分类： Technical Resources

Metallurgical casting steel water-clad hoisting conditions are harsh and extremely risky. High temperature radiation at 800℃ and frequent heavy-duty operations can easily cause safety hazards such as aging and failure of ordinary cranes, braking failures, and load slippage.32t foundry ladle cranes is specially developed for molten metal hoisting scenarios. It is a special metallurgical casting crane adapted to high-temperature metallurgical casting conditions. High-temperature resistant 32t foundry ladle cranes are heavy-duty high-temperature cranes that have passed the A7-level heavy-duty work system certification. Relying on professional high-temperature thermal insulation engineering and dual emergency braking redundant protection design, it can withstand high-temperature thermal shock for a long time, stably lock heavy-duty loads, and effectively adapt to the high-strength casting production environment to ensure the safe, efficient and long-term operation of the production line. It is a special crane for the core of the foundry workshop.

Engineering for 800°C Radiant Heat

During the pouring and transportation of molten steel in the foundry, the high-temperature molten steel continuously releases high-intensity radiant heat at 800℃, which will quickly cause deformation of metal components of ordinary cranes, aging of rubber cables, failure of electrical components, and failure of lubricating oil carbonization. Major safety accidents such as leakage of molten steel and falling loads will be caused.Henan Mine Crane Factory supply 32t foundry ladle cranes has targeted a full set of 800℃ radiant heat protection projects. As a high-temperature-resistant explosion-proof crane, the heavy-duty and high-temperature-resistant 32t foundry ladle cranes has built a comprehensive high-temperature-resistant operation system from the three dimensions of component protection, material selection, and heat insulation of the electronic control system to ensure that this heavy-duty casting crane can operate stably under high temperature conditions for a long time.

Thermal protection of crane components

The core load-bearing and moving components of the whole machine adopt a layered thermal insulation and protection structure to completely isolate the penetrating damage of 800℃ radiant heat.The main beam, end beam, reel, pulley block and other core metal components of this special casting crane are sprayed with a special high-temperature thermal insulation coating on the surface. The coating can effectively block high-temperature radiation and avoid thermal fatigue deformation and strength degradation of the metal substrate due to long-term high-temperature baking. Problems.For the lifting operation area directly above the ladle, this high-temperature crane is equipped with detachable high-temperature thermal insulation panels to form a physical thermal insulation barrier to block direct high-temperature heat sources.

At the same time, the equipment optimizes the heat dissipation structure of the components, and reserves ventilation and heat dissipation channels in the heavy-duty parts to achieve passive air-cooled heat dissipation and avoid heat accumulation.For precision moving parts such as bearings, gears, pins, etc., a special lubricating medium for high temperature resistance is used, which can withstand high temperature conditions in a radiant heat environment of 800℃, eliminate grease carbonization, dry wear and wear of components and other failures, ensure the stability and flexibility of the mechanical transmission structure of this metallurgical crane, and greatly reduce the equipment failure rate of the crane in a high temperature environment.

Heat-resistant materials and insulation

The materials of the whole mechanism have been adapted and selected for high-temperature working conditions, abandoning ordinary carbon steel and general-purpose accessories, and adopting a full set of industrial-grade high-temperature-resistant special materials, which are suitable for long-term operation needs of 800℃ radiant heat.The main load-bearing structure is made of high-strength heat-resistant alloy steel, which has excellent high-temperature strength, thermal deformation resistance and fatigue resistance. Under continuous high-temperature radiation environment, there will be no deformation, cracking and other problems, and it professionally guarantees the structural stability and operational safety of this 32-ton casting crane for heavy-duty lifting.

The thermal insulation filling material adopts multi-layer composite high-temperature-resistant thermal insulation cotton, with a flame-retardant thermal insulation sealing structure, stable thermal insulation performance, high flame-retardant grade, and sustainable blocking of high temperature conduction.The steel wire rope adopts high-temperature-resistant steel core steel wire rope, abandoning ordinary fiber core material, avoiding high-temperature burning and aging, greatly improving tensile strength and high-temperature resistance, and adapting to the high-risk working conditions of molten metal hoisting.All sealing and cushioning accessories are made of high-temperature and flame-retardant rubber materials to prevent high-temperature softening, aging and cracking, and improve the overall heat resistance level and service life of the equipment in all directions.

Protection of electrical and control systems

The electrical and control system is the core brain of the crane, and it is also the most vulnerable component in a high temperature environment.For 800℃ radiant heat conditions, this 32t foundry ladle cranes, as a special metallurgical crane for industry, adopts an independent closed electronic control cabin design. The core electrical components such as electronic control cabinets, frequency converters, and PLC controllers are centrally arranged in a sealed electronic control room. The electronic control room is equipped with a special pressurized cooling system and industrial air conditioning to achieve constant temperature and heat insulation protection, isolate the intrusion of external high-temperature heat sources, and ensure the stable operation of the crane’s electronic control system.

The complete set of cables of the equipment adopts high-temperature and flame-retardant special cables, which can withstand high-temperature radiation for a long time without aging, short-circuiting, and leakage. The circuit joints are treated with high-temperature insulation and sealing to prevent poor contact with high-temperature oxidation.At the same time, the control system is equipped with a high-temperature real-time monitoring module, which can dynamically collect the operating temperature of the electronic control system, cables, and components. Once the temperature exceeds the safety threshold, the system automatically triggers an early warning and initiates a heat dissipation protection program to avoid the root cause of high temperature caused by electronic control failure, equipment out of control problems, to ensure accurate control and stable operation of the whole machine.

Dual Emergency Brakes for Critical Load Safety

Primary and secondary braking systems

The dual emergency braking system consists of two independent mechanisms, the main braking system and the backup auxiliary braking system. The two systems have no linkage dependence, independent power supply, independent control, and do not interfere with each other and are backed up by each other.The main braking system is a conventional operating braking mechanism, which adopts a hydraulic disc braking structure, with fast response speed and stable braking. It is responsible for the normal lifting, landing, start-stop, limit braking and other conventional working conditions of the crane. The braking accuracy is high, and it can achieve a smooth start and stop of 32 tons of heavy loads to prevent the steel ladle from shaking and shifting.The auxiliary emergency braking system is a purely mechanical spring braking structure, which is a passive safety protection device, does not require electric drive, and relies on mechanical elasticity to achieve locking braking.Under normal operating conditions, the auxiliary braking system is in a standby state and does not participate in conventional braking.When the main brake system fails, fails or is powered off, the auxiliary brake system will automatically activate instantly, without manual intervention throughout the process.The dual protection of the two sets of brake systems completely solves the industry shortcoming of insufficient reliability of the single brake structure, and greatly improves the safety factor of high-risk lifting conditions.

Emergency braking under abnormal conditions

In view of various sudden and abnormal working conditions in the foundry workshop, the dual emergency braking system can realize rapid response and intelligent locking in the whole scene.In emergency situations such as sudden power failure, electronic control system failure, main brake hydraulic failure, abnormal transmission mechanism, etc., the system recognizes danger signals at the millisecond level, immediately triggers the emergency braking program, and instantly locks the lifting reel and operating mechanism to prevent the molten steel from falling out of control and slipping.At the same time, the equipment is equipped with an intelligent discrimination system for abnormal working conditions, which can accurately identify dangerous states such as overload, overspeed, slip hook, tilt offset, etc., predict risks in advance and take the initiative to activate emergency braking.Compared with the single passive braking of ordinary cranes, the dual emergency braking system of this equipment can realize the dual protection of active early warning and passive locking. Regardless of electrical failure or mechanical failure, it can ensure that the equipment is stopped immediately under abnormal working conditions, the load is stably locked, and the high-risk operation risks are avoided in all directions.

Redundant load-holding protection

Key Design Features of a 32t Foundry Ladle Crane

Henan Mine Crane Factory supply 32t foundry ladle cranes are tailored based on special working conditions for metallurgical casting. Metallurgical-specific 32t foundry ladle cranes are customized industrial cranes, abandoning the standardized design of general cranes, focusing on the four core requirements of heavy-duty stability, high temperature tolerance, accurate control, safety and reliability, and integrating heavy-duty lifting structures, smooth lifting systems, all-round high temperature protection, intelligent monitoring systems and other core designs, suitable for small and medium-sized foundry workshops, full-process operations such as ladle transfer, pouring, and steel exchange, taking into account production efficiency and the long-term operating stability of the crane.

Heavy-duty lifting mechanism

Stable ladle handling

High-temperature protection

Continuing the core design of the 800℃ radiant heat engineering, the whole machine realizes full-dimensional high temperature protection, covering the whole mechanical, electrical, lubrication, and control system.In addition to the selection of heat insulation and high-temperature resistant materials for core components, the equipment is optimized for high-temperature vulnerable components. The brake system, bearings, couplings and other key moving parts are all customized with high temperature resistance, which can withstand high temperature radiation for a long time without failure.The constant temperature, dust-proof and heat-insulating design of the electrical system can prevent the double erosion of high temperature and dust, and ensure the stable operation of the electronic control components.At the same time, the equipment is equipped with a global high temperature monitoring and early warning system to monitor the temperature of key parts of the whole machine in real time. Once a local high temperature abnormality occurs, the early warning is triggered immediately and the heat dissipation and heat insulation protection procedures are activated to avoid high temperature failures in advance.The complete set of high temperature protection system can ensure continuous operation of the equipment under high temperature conditions throughout the year, no high temperature downtime, no aging and failure of components, and greatly improve the attendance rate of the equipment.

Reliable control and monitoring

The equipment is equipped with an industrial-grade intelligent centralized control system, which integrates operation monitoring, fault diagnosis, safety early warning, and data recording functions, making it easy to control and accurate to monitor.The system supports manual control, semi-automatic and precise control, dual-mode switching, and adapts to the needs of different operating scenarios. Operators can easily complete heavy-duty lifting, precise alignment, and smooth package drop operations.The whole machine is equipped with a full range of safety monitoring modules, which can monitor core parameters such as load weight, lifting height, operating stroke, equipment temperature, braking status, and wire rope wear status in real time, and all data are visualized in real time.In the event of hidden dangers such as overload, over-temperature, limit crossing, abnormal braking, etc., the system immediately warns of sound and light and automatically shuts down, while automatically recording fault data to facilitate later maintenance and maintenance.The intelligent monitoring system realizes that the whole process of equipment operation is controllable, verifiable, and traceable, and provides data support for safe production and equipment operation and maintenance.

Safety and Reliability in Foundry Crane Operation

Cast steel-clad cranes are special metallurgical high-risk cranes, and their operating safety and long-term reliability are directly related to the production safety and economic benefits of enterprises.32t foundry ladle cranes builds a full-cycle safe operation system of the crane from the four dimensions of load stability, high temperature protection, fault tolerance, and convenient operation and maintenance. The working condition-adapted 32t foundry ladle cranes relies on fail-safe design, comprehensive protection mechanism, and long-term reliable structure to achieve long-term stable, low-failure, and high-safety operation of the crane, which fully complies with the safety standards of special cranes in the metallurgical industry.

Load stability during lifting and transportation

Load stability is the core safety prerequisite for the lifting of molten steel.Through the dual guarantee of structure optimization and intelligent control, this equipment realizes zero shaking and zero offset of the load in the whole process of lifting.The heavy-duty rigid main beam structure eliminates heavy-duty deformation and jitter, frequency conversion flexible start-stop technology eliminates start-stop impact, and the intelligent anti-swing system accurately corrects the lifting trajectory to ensure that the molten steel package remains absolutely stable during the whole process of lifting, walking, landing, and standing.At the same time, the equipment is equipped with high-precision overload limiters and partial load protection devices, which can monitor the load status in real time to eliminate the load tilt and equipment overload damage caused by overload and partial load lifting.In the complex working conditions of the workshop, frequent start-stop, and cross-zone transfer scenarios, the load is always kept stable, and safety risks such as molten steel splashing and falling are completely avoided, so as to ensure the safety and controllability of the whole production process.

Protection against overheating

In view of the continuous 800℃ radiant heat environment of the foundry workshop, the equipment has built a dual anti-overheating system of active heat dissipation and passive heat insulation to eliminate the overheating failure of the equipment from the root cause.At the passive thermal insulation level, the multi-layer thermal insulation structure of the whole machine, high-temperature-resistant materials, and a closed electric control cabin effectively block external high-temperature heat sources.At the active cooling level, the dedicated cooling system of the electronic control system, the ventilation and cooling channels of mechanical components, and the cooling structure of moving parts work together to quickly dissipate the heat generated by the operation of the equipment and the heat transmitted by the environment.The global temperature monitoring system is on duty in real time 24 hours a day, accurately captures the hidden dangers of local overheating, and initiates the protection mechanism in advance to avoid high-temperature aging, carbonization, and failure of components.Under long-term high-temperature continuous operation, Henan Mine Crane Factory supply cranes can always maintain the rated operating temperature, without overheating and shutdown, and without thermal damage to components, greatly improving the continuous operation capacity and service life of the equipment.

Fail-safe system design

The whole machine adopts the industry’s top fail-safe design concept, and all safety agencies follow the principle of failure as safety locking to eliminate the risk of failure out of control.All safety components such as dual emergency braking system, load locking device, limit protection, power failure protection, overheating protection, etc., In the event of failure, failure or abnormal working conditions, the equipment will immediately automatically stop, lock the load, and enter a safe sleep state. There will be no dangerous situations such as loss of control, slippage, and malfunction.At the same time, the equipment is equipped with multiple fault tolerance mechanisms, a single component failure will not affect the core safety functions of the whole machine, and the redundant design guarantees absolute safety under high-risk working conditions.The complete set of fail-safe system covers the entire scene and working conditions of equipment operation, completely solves the safety shortcomings of traditional crane failures and out-of-control, and builds a strong safety line of defense for casting production.

Maintenance for long-term reliability

In order to meet the needs of continuous industrial production, the equipment adopts a modular and easy-to-maintain structure design, which greatly reduces the cost of late operation and maintenance and downtime.The standardized and modular layout of the core components makes it easy to disassemble, assemble and overhaul, without the need for large-scale disassembly of equipment.The high-temperature and vulnerable parts are designed independently and can be replaced separately to reduce maintenance costs.The intelligent equipment system has its own fault self-diagnosis function, which can accurately locate the fault point and prompt the operation and maintenance plan, greatly improving the maintenance efficiency.At the same time, the selection of materials with high temperature resistance, wear resistance and anti-aging greatly reduces the speed of component loss and extends the crane maintenance cycle.Manufacturers are equipped with a complete operation and maintenance guidance system, combined with equipment operation data, preventive maintenance can be achieved, potential failures can be investigated in advance, and sudden downtime can be avoided.Through scientific structural design and intelligent operation and maintenance system, the equipment can achieve long-term low-failure and high-reliability operation, greatly improving the service life of the equipment and the continuity of enterprise production.

Henan Mine Crane Factory Custom

Relying on mature 800℃ radiant heat engineering protection technology and dual emergency redundant braking safety system, 32t foundry ladle cranes accurately solves the core pain points of metallurgical casting high-temperature, heavy-duty, and high-risk operations. Each technology upgrade focuses on the actual needs of casting conditions, taking into account safety, stability, high efficiency and durability.Henan Mine Crane manufactured 32t foundry ladle cranes, equipped with mature 800℃ high temperature protection technology and dual emergency redundant braking system, accurately overcome the problems of high temperature, high risk and heavy load in casting conditions.The whole machine is in compliance with standards, has strong stability and low failure rate, and can be adapted to continuous high-intensity operations in the workshop, effectively helping enterprises avoid security risks, save operation and maintenance expenses, and increase production capacity.As a professional crane manufacturer, Henan Mine Crane Factory supports customization of working conditions and is a reliable choice for ladle-in-steel lifting equipment of major foundry companies.

Traditional bulk grain loading and unloading equipment has high dust, high grain loss, and high operation and maintenance costs, and cannot be adapted to the green, efficient, and compliant operating requirements of modern grain terminals.The 25-ton bulk grain gantry crane is equipped with a sealed hopper system.

It is suitable for bulk grain loading and unloading scenarios such as wheat, corn, soybeans, etc., relying on the advantages of sealing and dust suppression, intelligent control, and strong adaptability, it is the preferred equipment for grain terminal upgrades.This article explains its structure, advantages, selection and operation and maintenance specifications in detail, and provides a reference for the selection and standardized operation of port equipment.

What Is a 25t Agri-Bulk Grain Gantry Crane

The 25-ton agricultural bulk grain gantry crane is a heavy-duty rail loading and unloading equipment built for port grain terminals, grain and oil storage and grain logistics hubs. It mainly completes the loading and unloading of bulk grain ships, transshipment and warehousing.The whole machine consists of four modules: gantry, lifting trolley, walking mechanism, and electronic control system. It is equipped with a sealed hopper reclaiming system and is suitable for bulk grain operations such as wheat, corn, and soybeans. It is the main equipment of large and medium-sized grain ports.

Compared with ordinary door machines, this machine abandons traditional hooks and is equipped with closed/semi‑closed sealed hoppers to lock bulk grain throughout the transfer process to reduce dust spills and material spills; the electric-hydraulic system can accurately control the displacement and lift, support mechanization and automation of high-frequency operations, and meet the needs of large-throughput bulk grain loading and unloading in ports.

The standard operating procedures of the equipment form a closed loop, which is also the core working logic of bulk grain loading and unloading in the port.：

1. Precise alignment: The gantry crane travels smoothly along the dedicated track, accurately docks to the operating area of the ship’s cargo hold, and completes the calibration and positioning of the operating point, with no offset and no blind spots.；
2. Sealed reclaiming: The sealed hopper is smoothly lowered into the interior of the grain stack in the cargo hold, and the bulk grain material is captured in sufficient quantity through a precision closed structure. After it is closed, a fully sealed state is formed to lock the dust and material from the source.；
3. Smooth lifting: The equipment adopts a controllable acceleration lifting mode to smoothly lift the fully loaded hopper, which effectively reduces material shaking, grain scattering and dust lifting, and ensures the stability and safety of the lifting process.；
4. Precise transfer: the lifting trolley and the gantry work together to translate smoothly, and the sealed bulk grain materials are accurately transported to the terminal hopper and directly above the conveying equipment, and the whole process is stable without spilling.；
5. Fixed-point unloading: the hopper is opened accurately at the designated station, and the bulk grain falls into the back-end conveying system at a uniform speed, completing the efficient transfer of materials and eliminating material waste and site pollution.；
6. Circular operation: After the unloading is completed, the empty hopper quickly returns to reset, returns to the ship’s cargo hold to carry out a new round of reclaiming operations, and runs in a closed loop back and forth until the whole ship’s bulk grain unloading operations are all completed.

Core advantage

In the field of port bulk grain loading and unloading equipment, the 25-ton rated load is recognized by the industry as the gold standard for small and medium-sized grain terminals. The core advantages are concentrated in the three dimensions of working condition adaptation, safety redundancy, and investment cost performance, accurately matching the actual needs of mainstream bulk grain operation scenarios.

Advantages of adapting to working conditions

The operating parameters of the 25-ton bulk grain gantry crane are highly adapted to the loading and unloading conditions of mainstream bulk grain such as wheat, corn, and soybeans, and are perfectly adapted to the operating scale of most small and medium-sized grain and oil terminals, storage bases, and import and export logistics hubs.

The equipment can be flexibly adapted to different tonnage grain ships, standard terminal hoppers, conveying lines and silo storage systems. It has strong compatibility and can cover the whole process of conventional bulk grain loading and unloading, transshipment, warehousing, cross-modal transit and other operations in all directions. The versatility far exceeds that of special equipment for small tonnage.

Safety redundancy advantage

Sufficient safety margin is reserved for the rated load of the equipment, and the operating stability is extremely high.Taking wheat (bulk density of about 780kg/m3) as an example, the industry standard is equipped with a special sealed hopper of 2-3m3, and the weight of a single full load of grain is only 1.5-2.5 tons, which is much lower than the rated lifting weight of 25 tons.

Sufficient load margin can easily offset additional loads such as hopper weight, wind load, dynamic start-stop impact, etc., and avoid safety hazards such as overload, fuselage shaking, and material spilling throughout the process, and adapt to the high-frequency and continuous heavy-duty operation mode of the port.

Cost-effective advantage

The 25-ton model achieves the optimal balance between equipment investment and operating efficiency, and accurately adapts to the budget and production capacity requirements of the mid-range grain terminal.Compared with 50-ton and 100-ton large-scale ship unloading equipment, its procurement, infrastructure and operation and maintenance costs are lower, easy to deploy, and the threshold for landing is small.；

Compared with 10-ton and 16-ton small-tonnage equipment, the machine’s operating efficiency, load stability, and operating coverage are all-round advantages. It can effectively improve the throughput of the terminal and avoid the problems of insufficient production capacity and frequent start-up and stop of small equipment. It is a cost-effective choice for small and medium-sized grain and oil terminals and private grain storage bases.

Mainstream application scenarios

With its high adaptability, high flexibility and high stability, the 25-ton agricultural bulk grain gantry crane is widely used in various bulk grain processing scenarios, covering the whole chain of grain import and export, warehousing and transshipment.：

1. Port grain terminal: Focus on specialized loading and unloading operations of bulk grain ships, and efficiently complete the material transfer between ships and shore-based equipment. It is the core main loading and unloading equipment of grain ports.
2. Grain and oil import and export park: suitable for cross-border grain and oil bulk loading, unloading, transit and transshipment operation scenarios, can meet the needs of foreign trade grain standardization, high frequency, and large throughput operations.
3. Agricultural bulk grain yard: The whole process of bulk grain stacking, on-site transshipment, loading and warehousing can be mechanized in one stop, effectively improving the efficiency of warehouse turnover and the level of standardization of operations in the yard.
4. Professional ship unloading station: accurately adapt to the centralized unloading conditions of bulk grain ships, greatly shorten the length of time for ships to dock in the port, and significantly improve the utilization rate of dock berths and overall operating efficiency.
5. Grain silo transit base: it can be seamlessly connected with conveyors, hoists, and silo storage systems to realize the automation of the whole process of bulk grain transfer, transportation, and warehousing, and adapt to the needs of large-scale warehousing and transit.
6. Public railway-water multimodal transport hub: adapt to multi-scenario and multi-modal transport conditions, efficiently complete the bulk grain transit connection between waterways, railways, and roads, and ensure efficient and smooth logistics links.

How Sealed Bucket Unloaders Improve Bulk Grain Handling

The 25-ton agricultural bulk grain gantry crane is a special orbital loading and unloading equipment for grain terminals, warehousing and multimodal transport hubs. It is suitable for unloading, transshipment and warehousing of bulk grains such as wheat, corn and soybeans.The equipment consists of four core structures: a gantry, a lifting trolley, a walking mechanism, and an electronic control system. It is equipped with a special sealed hopper to adapt to various bulk grain operation scenarios.

The machine abandons the traditional hook structure and adopts a fully/semi-enclosed sealed hopper, which operates in a closed manner throughout the process, effectively controlling dust and preventing material from spilling.Relying on the electro-hydraulic collaborative system to achieve accurate start-stop translation, the degree of automation is high, which can meet the needs of high-frequency and large-capacity loading and unloading operations in grain ports.

Precise control

There are two major industry pain points of dust pollution and grain spilling and loss in bulk grain loading and unloading operations in grain ports, which not only increase the cost of operation and maintenance and cause waste of food resources, but also easily cause environmental protection problems and endanger the occupational health of operators.The 25-ton bulk grain gantry crane is equipped with an exclusive sealed hopper system to solve various disadvantages in a targeted manner from the source of the operation. The core values are reflected in three dimensions.：

Operating environment

The sealed hopper adopts a closed structure design, which firmly locks the fine grain dust and powder materials in the closed loop of grain grabbing, full load lifting, horizontal transfer, and fixed-point unloading operations, and eliminates the dust-raising problem of open grab operations from the source.

At the same time, it can be used with the terminal’s windproof hopper and dust collection equipment to work together to effectively resist the spread of dust caused by wind, greatly reduce the dust concentration in the operating area, and completely improve the dirty operating environment of the terminal.

Strictly control material spilling

Compared with the disadvantages of traditional grab gaps leaking materials and transportation spills, sealed hoppers rely on high-precision bite structure and flexible sealing accessories to achieve leak-free operation throughout the process.Effectively avoid the material loss of bulk grain in the transit process, minimize grain loss, greatly improve the utilization rate of bulk grain, reduce material loss costs for port enterprises, and achieve quality and efficiency improvement.

Adapt to environmental standards

The complete set of sealed unloading system fully conforms to the port’s environmental protection control and occupational safety protection regulations, effectively solves the problem of excessive dust in bulk grain loading and unloading, and avoids the risk of environmental penalties.A clean and low-dust operating environment can not only protect the occupational health of operators, but also help grain terminals build a green, standardized and compliant bulk grain operating system, which is suitable for the green development requirements of modern ports.

Controllable precise unloading

The sealed hopper is equipped with a hydraulic and electric dual-mode precision opening and closing mechanism, with fast response speed and high control accuracy. The operator can accurately control the timing and opening and closing amplitude of the hopper through the control system, and only complete the unloading operation directly above the receiving hopper and conveyor.

The hopper is precisely adapted to the terminal receiving equipment, which can realize the fixed-point unloading of grain and prevent material spilling and offset.It not only reduces the loss of grain and the amount of cleaning work, but also stabilizes the pace of transportation, and adapts to the large-scale and standardized efficient operation mode of the port.

Key Components of a 25t Grain Gantry Crane

Heavy-duty door-type main structure

The main body of the equipment adopts box-shaped double-beam welded steel structure, and high-strength industrial steel is selected. The overall structure is stable, the bearing capacity is strong, and the fatigue resistance is excellent.The complete set of door frame consists of the main steel beam, support legs, end beam, lower beam, walking platform, guardrail, access ladder, operation room and other accessories. The structure is reasonably laid out and the working space is sufficient to facilitate transportation, installation and daily maintenance.

In view of the high-frequency cycle operation conditions of the port, the main structure has been optimized by professional mechanics to withstand tens of thousands of repeated heavy loads, effectively resist the structural fatigue caused by sea breeze, vibration, and dynamic loads, and adapt to the long-term heavy-duty operation needs of outdoor ports to ensure the long-term stable operation of equipment.

Lifting mechanism

The lifting mechanism is the power core of the equipment, which directly determines the efficiency and safety of bulk grain loading and unloading. The core configuration includes a lifting motor, a deceleration gearbox, a wire rope reel, a braking system, and an overload protection device.The whole system has plenty of power and stable operation, and can achieve precise lifting and speed regulation.

The equipment is specially optimized for bulk grain operations, with low-speed and stable movement in the hopper compartment, dust suppression and anti-spreading, and air transportation to speed up and increase efficiency.With multiple braking and overload protection, it can lock the load in real time, automatically alarm and power off if it exceeds the standard, and build a strong lifting safety line of defense from the hardware level.

Sealed hopper for grain

As an exclusive operating accessory, the sealed hopper is customized according to the characteristics of grain materials, and its core advantages are outstanding: it matches the exclusive volume according to the bulk density of grain and the throughput of the operation; the inner wall is equipped with wear-resistant steel plates to resist grain friction, fine sand and gravel wear, and extend the service life.；

The occlusal part is equipped with high-elastic sealing tape to achieve full-dimensional dust-proof and leak-proof; it is equipped with a hydraulic/electric intelligent opening and closing mechanism, which has stable operation and low failure rate, and is suitable for long-term high-frequency operations.

The whole machine walking operation system

The equipment walking mechanism consists of an end beam, a load-bearing walking wheel, a dedicated port track, and a frequency conversion drive system (VFD), which is the key to ensure the precise alignment and smooth operation of the equipment.

The special heavy-duty track is adapted to the outdoor paving environment of the port, with strong bearing capacity and high stability, which can ensure the long-term smooth operation of the whole machine and cover a wide range of terminal operating areas.

Electrical intelligent control system

The equipment is equipped with a PLC intelligent control system, which supports multiple operating modes of cab, wired handle, and wireless remote, and is suitable for various operating scenarios.It has functions such as operation monitoring, fault alarm, emergency shutdown, and data recording, and can be connected to terminal automated transportation and storage equipment to realize the whole process of bulk grain loading, unloading, transshipment, and warehousing.

The electrical system adopts a special design for dustproof, moisture-proof and anti-corrosion, which is suitable for the high humidity, dust and salt spray environment of the port, and the redundant design of the control system greatly reduces the probability of electrical failure and guarantees the stable operation of the equipment around the clock.

Advantages of 25t Gantry Cranes for Port Grain Terminals

High work efficiency

The operation cycle of the equipment is stable and the rhythm is compact. With a customized sealed hopper, the single reclaiming volume is large and the cycle time is short, which can achieve high-frequency continuous operation.Compared with traditional loading and unloading equipment, it greatly improves the hourly throughput of bulk grain, effectively reduces the demurrage fee of ships in the port, improves the utilization rate of terminal berths, and adapts to the needs of large-scale grain import and export operations.

Green

Relying on the closed operation design of the sealed hopper, the problems of dust and material loss in bulk grain loading and unloading are solved from the source.The low dust concentration and very little material spilling in the operating area not only improve the operating environment of the terminal, reduce the cost of clean operation and maintenance, but also fully meet the environmental protection and compliance requirements of the port. It is the core standard equipment of the green grain terminal.

Flexible layout

The orbital gantry structure covers a wide range and can operate back and forth along the long-distance track of the terminal. A single equipment can cover multiple cargo compartments and multiple receiving points, which are suitable for different terminal layout and different storage and transshipment configurations.The equipment does not need to occupy a large area of the ground space of the terminal, optimize the layout of the site, and adapt to the renovation and new construction projects of the old and new grain terminals.

Strong outdoor weather resistance

In view of the harsh working conditions of high humidity, salt spray, high winds and rainy weather in coastal ports, the equipment adopts a full set of anti-corrosion, waterproof and dustproof designs.The main steel structure is equipped with a multi-layer anticorrosive coating, the electrical components are sealed with a high protection level, and are equipped with windproof anchoring and track clamping devices, which can withstand high winds, heavy rains, and salt spray corrosion. Stable outdoor operations all year round, and longer service life.

Multiple security protections

The equipment is equipped with a full set of intelligent safety protection systems, including travel limit switch, overload protection, emergency braking, anti-collision system, real-time load monitoring, fault alarm and other functions, to avoid safety hazards such as lifting overload, travel overrun, equipment collision, and sudden failure in all directions, to ensure the safety of personnel, equipment, and cargo, and to adapt to high-intensity and high-load operation scenarios in ports.

How to Select the Right 25t Grain Gantry Crane

Clear job throughput

Hourly operating throughput of equipment = weight of material in a single bucket × number of operating cycles per hour.The selection needs to be combined with the average daily and monthly grain operation volume of the terminal to match the adapted hopper volume and equipment operating speed, so as to avoid insufficient production capacity caused by too small selection and waste of resources caused by too large selection. At the same time, it matches the frequency of ships’ port operations to ensure that the operating efficiency matches the production capacity.

Analyze the characteristics of grain materials

The bulk density, fluidity, dust volume, and wear resistance of different grains vary greatly, which directly affects the hopper selection and equipment parameter configuration: the bulk density of wheat, corn, and soybeans is different, and the corresponding hopper volume needs to be matched; high-moisture grains are easy to clump, and the unloading structure needs to be optimized; grain categories with large dust volume need to strengthen the sealing configuration of the hopper; grains containing fine impurities need to strengthen the wear-resistant protection of the hopper.

Accounting for span and lifting height

According to the width of the pier trestle, the maximum width of the operating ship, the height of the cargo hold, and the installation location of the receiving hopper, the span and lifting height of the equipment are accurately calculated, and sufficient safe operating margin is reserved to ensure that the equipment can cover the entire operating area, there are no operating blind spots, and it is suitable for all kinds of conventional grain ship operations.

Match the working level of the equipment

The working level directly determines the service life and heavy-duty capacity of the equipment: for high-frequency large grain terminals that operate continuously in two or three shifts a day, the high-frequency A5 and A6 working levels need to be selected; for seasonal operations and low-frequency grain depots, the A4 level can be selected to meet the needs, and the precise selection can balance the cost and service life of the equipment.

Adapt to the outdoor environmental conditions of the port

Coastal ports need to focus on factors such as salt spray corrosion, high winds, high humidity, and temperature difference changes, and customize anticorrosive coatings, stainless steel fittings, high-protection electrical systems, and windproof safety devices; inland grain terminals can simplify anticorrosive configuration, focus on wear-resistant and dust-proof design, and fit actual working conditions to avoid over-configuration or under-configuration.

Safety and Environmental Considerations

Mechanical safety protection

The equipment is equipped with a full set of mechanical safety devices, and the overload protection system can monitor the load in real time and automatically stop and alarm if it exceeds the standard; the travel limit switches in all directions prevent over-range operations; the lifting and walking mechanisms are equipped with reliable braking systems, which can be quickly locked in emergency situations; the whole machine is equipped with an emergency shutdown button, which can be powered off and stopped with one key in case of sudden failure, avoiding the risks of mechanical operations in all directions.

Electrical safety protection

All electrical equipment adopts dust-proof, moisture-proof, and waterproof sealing design, which is suitable for the dusty and high-humidity environment of the port; the equipment is equipped with a perfect grounding system to eliminate the hidden dangers of static electricity in the dust environment; the motor is equipped with overheating protection, short circuit protection, and redundant design of key components of the control system to avoid safety accidents caused by electrical failures.

Special treatment of grain dust

With the dust control at the source of the sealed hopper as the core, it is equipped with the terminal pulse bag dust removal equipment, the dust-proof enclosure of the receiving hopper, and the closed design of the conveyor to form a complete dust control system.Regularly clean up the dust on the surface of the equipment to eliminate the hidden dangers of dust accumulation, not only to meet the requirements of environmental protection, but also to avoid the risk of grain dust explosion, and to ensure the safety and compliance of operations.

Special protection against corrosion and rust

In view of the corrosive environment of coastal ports, the main body of the equipment adopts the multi-layer anticorrosive process of sandblasting and rust removal + zinc-rich primer + intermediate paint + topcoat, and the exposed bolts and accessories are made of galvanized and stainless steel; the paint surface is regularly checked for integrity, and the wear and tear and shedding coatings are repaired in time to prevent the corrosion and aging of steel structures and extend the service life of the equipment.

Conclusion

The 25-ton agricultural bulk grain gantry crane is equipped with a sealed hopper unloading system, which is suitable for small and medium-sized and medium-sized grain terminals, grain and oil storage bases, and multimodal grain logistics hubs. It can take into account operational efficiency, equipment investment and safety margin. At the same time, it can improve the dust, spilling and material loss problems in traditional bulk grain loading and unloading.

The equipment adopts a sturdy steel structure, a precise control system and an outdoor weather-resistant design, and is equipped with multiple safety protections. The operation is stable, continuous and environmentally friendly.The whole machine supports the customization of working conditions of lifting weight, span, hopper and other parameters, which can improve quality and efficiency, reduce costs and consumption, and help the standardization and green operation of grain ports.

Henan Mine Crane can provide customized design and manufacturing solutions for 25-ton bulk grain gantry cranes and sealed hopper unloading systems according to the material characteristics, operating procedures and on-site working conditions of grain terminals.

The lifting operation of 12-18 meters long pipelines in steel pipe, oil and gas, infrastructure, ports and other industries is extremely difficult and risky.Traditional single-hook hoisting is prone to uneven load, pipe deformation, slippage and fall, which seriously affects operating efficiency and can easily cause pipe loss and safety accidents.

The 20-ton gantry crane equipped with hydraulic telescopic hoisting beams is a special and efficient equipment for hoisting long pipelines. With the advantages of precise hydraulic adjustment, multi-point balanced force, and stable and controllable hoisting, it completely solves the problem of long-span pipeline handling.

This article systematically explains the structure configuration, working principle, design points, safety specifications, application scenarios, selection standards and operation and maintenance plans of the equipment, and provides a professional reference for the selection and on-site operation and maintenance of pipeline hoisting equipment in industrial enterprises.

What Is a 20t Gantry Crane for Long Pipe Bundles

The special gantry crane for the 20-ton long pipeline is a self-supporting load-bearing structure, which does not need to rely on the support of the plant building, and is suitable for indoor and outdoor multi-scene operations. The core structural components have a clear division of labor and operate in concert to form a stable and efficient hoisting system.：

1. Main beam: As the core load-bearing component, the 20-ton equipment adopts a double main beam design as a priority. It has strong bearing capacity, large lifting height and high structural stability. It can be perfectly adapted to the installation and heavy-duty operation requirements of long hanging beams and special spreaders for pipelines, and effectively resist the lateral stress caused by long loads.
2. Outriggers: A double-sided vertical support structure, connecting the main beam and the end beam walking mechanism, which can evenly transmit the lifting load and equipment weight to the ground or track foundation to ensure that the whole machine operation has no offset and no overturning.
3. End beam and walking system: equipped with walking wheels, driving devices and braking mechanisms, it supports multiple walking modes of orbital and wheeled, which can realize fixed-point start-stop and smooth travel of the whole machine, and is suitable for a wide range of material transfer needs in pipeline depots.
4. Lifting mechanism: equipped with core components such as wire rope winches and lifting trolleys, it can be adapted to different lifting speeds and lifting heights according to operating conditions to meet the diversified operation needs of stacking pipeline bundles, vehicle loading and unloading, and precise alignment.
5. Control system and safety device: it supports three modes of flashlight, wireless remote control, and cab control. It comes standard with a frequency conversion speed control system, overload protection, travel limit, emergency braking and other safety configurations to avoid hoisting risks in all directions.

The rated lifting weight of 20 tons is the golden parameter range for long pipeline hoisting. It can cover the self-weight load of most steel pipes, oil and gas pipelines, and municipal pipelines on the market. It takes into account the cost performance of the equipment and the versatility of the operation, and is suitable for the normalization of small and medium-sized heavy-duty pipeline yards and production lines.

Reasons for the abandonment of single hook hoisting for long pipes

Conventional single-hook hoisting can be used for short-length and light-weight pipes, but the structural characteristics of ultra-long pipe bundles determine that single-hook hoisting has unavoidable technical defects and cannot meet safe operating standards at all.：

1. Load concentration: Single-hook single-point hoisting will concentrate the weight of the entire bundle of pipes in a small force area, and the force of the pipe at the edge of the bundle is unbalanced, which is prone to slippage, loose bundles, misalignment and other problems, resulting in pipe collision damage.
2. Rod deflection: Long pipes have a large span and long torque. When there is no support at both ends of the pipe when lifting at a single point, there will be significant sagging and deflection, resulting in deformation of the overall geometry of the pipe bundle, which can cause bending and cracking of the pipe in severe cases.
3. Lateral force: When a single hook is used with an oblique sling, it will produce a strong lateral extrusion force, squeezing the overall structure of the pipe bundle, destroying the arrangement structure of the pipe, and greatly increasing the risk of overturning and falling of the hoisting.
4. Therefore, the hoisting of long pipeline bundles must rely on a multi-point uniform force mode, and the hoisting beam equipment is the core device to achieve multi-point balanced hoisting.

Core role and operational advantages

The hanging beam is the core supporting tooling of the gantry crane, and it is also the key equipment for the safe hoisting of long pipeline bundles. It can completely subvert the force defects of single-hook hoisting. The core value is reflected in four aspects.：

1. Dispersed hoisting stress: The multi-point distributed force structure is adopted, which can evenly distribute the concentrated load to the whole of the pipeline bundle, eliminate the problem of local stress concentration, effectively avoid pressure damage to the pipe, and maximize the protection of the workpiece. Intact.
2. Stabilize the shape of the pipe bundle: accurately locate the lifting force point, so that the force of the whole bundle of pipes is balanced and arranged in a regular manner, effectively eliminate the problems of pipe displacement, loose baling, and misalignment during the lifting process, and ensure the integrity of the hoisting.
3. Optimize the force state of the sling: open the spacing between the sling points to keep the sling in a vertical force state, greatly reduce the tilt angle of the sling, eliminate the lateral extrusion force and the lateral load, and avoid the risk of pipeline extrusion deformation.
4. Improve the controllability and stability of hoisting: ensure the horizontal lifting and smooth movement of the pipeline bundle throughout the process, and the load attitude can be controlled, effectively reducing the probability of load swing and overturning, and reducing the difficulty of operation and control of operators.

How Hydraulic Spreader Beam Systems Work

Principle of hydraulic drive and expansion

The traditional fixed hanging beam has a fixed size and non-adjustable hanging point. It can only be adapted to a single-specification pipe bundle, and its versatility is extremely poor.The hydraulic hanging beam is equipped with a fully automatic hydraulic telescopic system, which does not require manual disassembly, assembly and debugging, and can be quickly adapted to pipe bundles of different lengths and diameters, and the adaptability is greatly improved.

The core of the system consists of a hydraulic power unit, a two-way hydraulic cylinder, a telescopic beam body, and a control valve body: the hydraulic power unit provides stable high-pressure hydraulic oil, controls the flow direction of hydraulic oil through the valve body, drives the cylinder to expand and expand, and drives the main body of the hanging beam to achieve stepless expansion and adjustment.

The operator can accurately adjust the total length of the hanging beam and the spacing between the hanging points through the control system, and quickly match the pipe bundles of different lengths and diameters of 9-18 meters. There is no need to manually disassemble the pin shaft and re-fix the hanging point, which greatly saves debugging time.

Load balancing hoisting principle

The most common problem with long pipe bundle hoisting is that the lifting at both ends is out of sync and the load is tilted and offset, which in turn leads to deformation of the pipe and unstable hoisting.The hydraulic hanging beam has an automatic load balancing function, which perfectly solves this pain point.

Each hydraulic cylinder of the equipment has equal force and interoperable pressure, which can automatically balance the load.When the force of the pipeline bundle is uneven, the hydraulic system compensates for the pressure difference in real time and evenly distributes the load at each lifting point to ensure the smooth horizontal lifting of the pipe, effectively avoiding partial load and pipe warping deformation.

Control method and operating characteristics

The hydraulic hoisting beam system is integrated with the main control system of the gantry crane, which is convenient to operate and accurate to control, and is suitable for industrial high-frequency operations.：

1. Proportional hydraulic control: The use of proportional control valve can accurately control the expansion speed and stroke of the cylinder, realize stepless speed regulation, eliminate the expansion and contraction of the hanging beam, the caton and jitter during load lifting, and ensure the stability of the operation.
2. Diversified control methods: it supports two modes of wired control of the flashlight door and wireless remote control. The operator can stay away from the load-bearing operation area and observe the posture of the pipeline throughout the process to avoid safety risks.
3. Integrated collaborative control: the functions of lifting beam telescopic, load lifting, walking of the whole machine, and braking start and stop can be operated cooperatively, without switching the control system, and the whole process of hoisting can be completed with one click, and the operating efficiency is greatly improved.

Key Design Considerations for 20t Pipe-Bundle Gantry Cranes

Load adaptation design

20 tons is the rated safe working load (SWL) of the equipment. When selecting and operating, it is not only necessary to refer to the static weight of the pipeline, but also to fully consider the impact of dynamic loads.Equipment start-up acceleration, walking braking, and load swing will all produce additional dynamic impact.

Therefore, in actual operations, it is recommended that the maximum lifting weight be 20%-30% lower than the rated load, and a safety margin be reserved.At the same time, the equipment design is fully compatible with dynamic load stress, and can be normalized to cope with high-frequency start-stop and continuous transfer operations, so as to avoid structural fatigue and component damage caused by long-term heavy-duty shocks.

Hanging beam size and adjustable design

The effective span of the hanging beam must match the length of the pipe. If the hanging beam is too short and the load is concentrated in the middle of the pipe, it will still cause the pipe to flex and deform.The hydraulically adjustable hanging beam can flexibly adjust the span according to the specifications of the pipeline bundle, which is suitable for multi-size pipe operations.

Compared with fixed hanging beams, hydraulic telescopic hanging beams do not require replacement of tooling or manual transformation. They can be adapted to all types of pipeline strapping and hoisting in the factory area, greatly improving the reuse rate of equipment and reducing the cost of enterprise equipment procurement.

Hanging point layout specification

The equipment supports two-point and four-point hoisting modes, which are adapted to the needs of different working conditions: short-length and light-weight pipe bundles can be hoisted at two points, with simple structure and efficient operation; long and heavy-duty pipe bundles over 12 meters need to be hoisted at four points.

The stress is further dispersed through distributed hanging points to avoid pipe deflection and deformation to the maximum extent possible.Before operation, it is necessary to accurately calculate the position of the center of gravity of the pipeline bundle, standardize the placement of the sling, ensure that the center of gravity of the load coincides with the lifting center, and eliminate the risk of partial load hoisting.

Door machine span and lifting height

The span of the equipment needs to match the maximum stacking width of the pipeline yard to ensure that the whole machine can span the working area without interference between the hanging beam and the pipe.The lifting height needs to meet the working conditions of pipeline stacking, truck loading and unloading, and ship transshipment. The double main beam structure can provide a larger effective lifting stroke, which is suitable for high stacking and high drop hoisting scenarios, and meets the safe lifting space of ultra-long pipeline bundles.

Work area adaptation design

The walking stroke of the whole machine needs to cover the entire operating range of the yard, and the customized design is carried out in combination with on-site ground hardening and track basic forms to achieve no dead-end transfer of the yard.At the same time, it combines the indoor and outdoor operating environment and the layout of material stacking to plan the walking path, and adapts to the needs of multiple operations such as normalized batch transfer, fixed-point stacking, and loading and unloading alignment.

Why Hydraulic Spreader Beams Improve Long Pipe Handling

Compared with traditional fixed hoisting beams and single-hook hoisting methods, hydraulic telescopic hoisting beams have outstanding advantages in load balance, operating stability, adaptability to working conditions and operating safety, completely solving many shortcomings of traditional hoisting, and greatly improving overall operating efficiency and economy.

Load balancing ability

It is difficult for traditional hoisting structures to achieve uniform force at multiple points, and problems such as partial load and local overload can easily occur during operation, and the stability is insufficient.The hydraulic lifting beam is equipped with an automatic load balancing system, which can balance the force state of each lifting point in real time, avoid the hidden dangers of partial load from the source, and ensure that the lifting force is always uniform and stable.

Long size load stability

The traditional hoisting method has limited support for ultra-long pipe bundles, and the pipes are prone to problems such as tilt, deflection, and misalignment of loose bundles, and the scrap rate is high.The hydraulic hanging beam adopts a multi-point balanced support structure, which can lock the load attitude throughout the process, effectively suppress the deformation and shaking of the pipe, and make the lifting of ultra-long components stable and controllable throughout the process.

Hanging point adjustment efficiency

The traditional single-point, narrow-domain hoisting force is concentrated, which can easily produce a large lateral extrusion force, resulting in pipe extrusion deformation, coating damage, and pipe bump damage.The hydraulic hoisting beam can effectively disperse the hoisting stress, weaken the lateral extrusion load, maximize the protection of the appearance and structural integrity of the pipeline, and reduce material loss.

Pipe protection performance

Traditional fixed hanging beams can only be adapted to a single-size pipe bundle, with poor versatility and low equipment reuse rate. Multi-specification production requires multiple sets of tooling and high input costs.The hydraulic telescopic hanging beam supports stepless telescopic adjustment, and can be flexibly adapted to pipe bundles of different lengths and diameters. One machine is suitable for all types of pipe operations, and it is extremely adaptable.

Multi-specification adaptation performance

The traditional hoisting control accuracy is limited, and the load attitude is easily offset, which requires frequent manual correction by the operator.The hydraulic system is equipped with a proportional and precise control module, which makes the lifting beam telescopic, load lifting, and equipment start and stop smooth and smooth throughout the process, greatly reducing manual intervention, reducing the difficulty of operation, and improving the alignment accuracy.

Hoisting control accuracy

In view of the factory conditions of mixed production of multi-specification pipes and high-frequency continuous transportation, the hydraulic hoisting beam completely abandons the cumbersome process of traditional manual replacement and manual adjustment of parameters, greatly compressing the single hoisting cycle, and the on-site operation efficiency can be increased by more than 30%.Under long-term operation, the comprehensive utilization rate of equipment is higher, the labor cost is lower, and the economic benefits are significant.

The hoisting of ultra-long pipeline bundles has a large span, large inertia, and easy to slip, which is a high-risk lifting operation.Standardizing and standardizing operating procedures and implementing all-round safety control are the core keys to avoiding pipe falls, equipment overturning, and personnel injuries.

Safety Considerations When Lifting Long Pipe Bundles

Special spreaders and slings need to be matched according to pipeline material, pipe diameter size, and surface anticorrosive coating. Priority is given to lifting and basket hoisting structures, and single-point clamp hard hoisting is prohibited.Thoroughly check the fastening status of the pipe bundle and the wear of the sling before the operation, and match non-slip cushioning accessories for galvanized and anticorrosive coated pipes to prevent pipe slippage, loosening, and shedding during the hoisting process.

Prevent pipe slippage and loose bundles

Sling tooling is selected according to pipe material, pipe diameter, and coating, priority is given to lifting and basket hoisting, and single-point clamp hoisting is disabled.Before operation, make sure that the hanging point is firm and the pipe binding is reliable. Galvanized and anticorrosive coated pipes are equipped with non-slip cushioning parts to prevent the pipe from slipping and falling off.

Stable hoisting posture

The equipment is equipped with frequency conversion drive (VFD) to achieve flexible start-stop, stepless speed regulation, and reduce load swing.Hoisting maintains a uniform speed of lifting and walking, and high-speed start-stop and forced alignment are prohibited; long-distance transportation plans the path in advance and slows down and buffers to maintain a stable load attitude.

Overload safety protection

The equipment is equipped with a high-precision load limiter and an intelligent overload protection system. The lifting load overrun can automatically alarm and cut off the lifting power to avoid the risk of overload from the hardware level.Before operation, the total weight of the pipe bundle must be accurately calculated, including the weight of ancillary equipment such as hanging beams and spreaders. Illegal operations such as overloading, partial loading, and cable-stayed crooked hoisting are strictly prohibited.

On-site vision and safety control

Priority is given to wireless remote control, the operator maintains a good field of vision, and monitors the status of both ends of the tube bundle.The ultra-long pipe hoisting equipment is equipped with full-time signal command, unified instructions and gestures, and a warning zone is delineated, and unrelated personnel are prohibited from entering the area under the load and the passage of equipment to prevent the risk of falling and bumping.

Applications of 20t Gantry Cranes With Hydraulic Spreader Beams

Steel pipe manufacturing workshop

It is suitable for the whole-process transfer operation of steel pipe production lines, and can complete the transfer of finished pipes after forming, welding, anticorrosion, and spraying, connect various production processes, realize the automated flow of materials in the workshop, and adapt to the needs of mass production and high-frequency operations.

It can safely carry 12-18 meters of ultra-long oil and gas high-pressure pipeline bundles, and stably complete high-frequency operations such as stacking, sorting, loading, and unloading.The equipment is resistant to high and low temperatures, dust, wind and rain, and can adapt to harsh outdoor working conditions. It is the core lifting equipment of the oil and gas pipeline storage yard.

Oil and gas pipeline storage yard

For oil and gas engineering, 12-18 meters of ultra-long high-pressure pipeline equipment can safely complete stacking, sorting, loading and unloading operations. The equipment can adapt to harsh environments such as outdoor high temperature, dust, wind and rain. It is the core hoisting equipment of oil and gas pipeline yard.

Municipal infrastructure projects

It is widely used in municipal pipeline projects such as water supply and drainage, pile foundations, electric power, and gas. It can accurately complete on-site pipe hoisting, alignment, laying, and storage operations, taking into account the needs of temporary construction sites and fixed yard operations, and has strong adaptability and high stability.

Port logistics and transshipment

It is suitable for port pipe loading and unloading, ship cargo transshipment, and yard stacking operations. It can quickly switch between different specifications of pipeline strapping and hoisting modes, efficiently connect trucks, ships, and yard material flow, greatly improve the efficiency of port cargo turnover, and adapt to large-volume export pipe operation scenarios.

Pipe processing and assembly workshop

It can accurately locate the position of ultra-long pipes, provide stable support for pipeline welding, beveling processing, coating repair, and assembly joints, and has a controllable hoisting attitude and high alignment accuracy, which can effectively improve the quality of pipe processing and the pass rate of finished products, and adapt to the needs of refined processing and production.

How to Specify a 20t Gantry Crane for Long Pipe Bundles

When purchasing and selecting models, enterprises need to clarify the core parameters in accordance with on-site working conditions to avoid insufficient equipment adaptability and redundant parameters. The core selection parameters are as follows：

• Rated load: The standard safety load of 20 tons of equipment includes a full set of tooling weight, combined with the dynamic working conditions of long pipeline hoisting to reserve the impact load margin, which can offset the instantaneous impact force generated by start-stop, walking, and load swing, effectively avoiding the risk of overload, and ensuring the stability and safety of high-frequency heavy-duty operations.
• Pipe adaptation parameters: The selection needs to accurately confirm the parameters such as the weight of the on-site pipe bundle, the pipe diameter interval, and the maximum length of the 12-18-meter pipe, so as to match the load-bearing, lifting point and hydraulic system performance of the equipment, so as to avoid the problem of insufficient bearing capacity or redundant waste of equipment parameters, and fit the actual operating conditions.
• Hanging beam parameters: The basic length and telescopic stroke of the hanging beam are selected according to the span of the mainstream pipe, to ensure that the adjustable span is adapted to various pipe specifications, to achieve multi-point balanced force, to prevent the deformation of the pipe caused by the concentration of the load, and the long hanging beam causes interference in the operation, so as to give full play to the advantages of equipment adaptation.
• Operating size parameters: combine the layout of the yard, loading and unloading conditions to customize the span, lifting height and walking stroke of the door machine, fully cover the operating area, no dead ends of hoisting, and adapt to multi-scene operations such as pipe stacking, truck and ship transshipment to avoid space and travel restrictions.
• Operating speed parameters: The lifting and walking operating speed can be customized as needed, the fine chemical conditions are adapted to the low-speed smooth mode, and the large-volume transportation is adapted to the high-efficiency mode to balance the operating efficiency and hoisting stability, and prevent the pipe from shaking, shifting, and bumping. Damage.
• Environmental parameters of working conditions: distinguish between indoor and outdoor operation scenarios and match the protection configuration. Outdoor equipment is equipped with anti-corrosion, windproof, dustproof, and high and low temperature resistant structures to resist harsh environmental erosion, delay the aging of equipment components, and improve the durability and stability of outdoor operation of equipment.
• Control system configuration: support wired and wireless multi-mode control, with frequency conversion speed regulation and intelligent anti-swing system, to achieve flexible start-stop, smooth speed regulation, effectively suppress pipe shaking, wireless control allows operators to stay away from dangerous areas, taking into account the convenience of control and operational safety.
• Safety protection configuration: The equipment is equipped with safety modules such as overload protection, stroke limit, emergency braking, and hydraulic voltage regulation as standard, which can monitor the load in real time, avoid over-range collisions, quickly emergency shutdown, and stabilize the lifting force. , All-round prevention of hoisting safety hazards, to ensure the safety of man-machine operations.
• Qualification and customization: The equipment complies with GB, ASME, CE and other domestic and foreign standards, can provide compliance qualifications, and is suitable for domestic construction and foreign trade projects; supports OEM/ODM personalized customization, and can optimize the equipment configuration for special working conditions, sites, and pipe requirements.

How to Improve Efficiency in Long Pipe Bundle Handling

• Standardize the standardized specifications of pipe bales: Unify the binding method, stacking size and forming standards of pipe bales in the factory area, organize the material specifications, reduce the frequency of frequent expansion and commissioning of hanging beams, greatly reduce the adaptation and commissioning time of a single hoisting, and improve the efficiency of batch operations.
• Curing optimal hoisting parameters: According to the conventional pipe specifications in the factory area, the core parameters such as optimal hoisting point spacing and hydraulic telescopic stroke are documented to form a standardized parameter library.On-site operations can directly retrieve the adaptation parameters, without repeated calculation and debugging, to achieve rapid alignment and hoisting.
• Popularize hydraulic adjustable hoisting beams globally: give full play to the core advantages of stepless expansion and multi-specification adaptation of hydraulic hoisting beams, comprehensively replace traditional fixed hoisting beams, realize universal hoisting of all types of pipes, greatly improve the reuse rate of equipment, and reduce redundant investment in tooling.
• Optimize the movement line of on-site operations: combine the material layout of the yard and the loading and unloading points to plan the optimal walking path of the door machine, avoid redundant operations such as invalid displacement and repeated alignment, streamline the hoisting operation process, and improve the fluency of site transfer.
• Linkage of the logistics rhythm of the factory area: deeply match the operation rhythm of production line discharge, truck loading and unloading, and ship transshipment, do a good job of process convergence, reduce the standby, waiting, and idling time of equipment, and realize the integrated and efficient linkage of logistics hoisting and hoisting.
• Implement a preventive maintenance mechanism: establish a normalized and periodic equipment maintenance ledger, investigate hidden dangers in hydraulic, electrical, walking and other systems in advance, prevent sudden equipment failures and shutdowns, and ensure the continuous and stable development of hoisting operations.
• Carry out special operation training: in view of the load characteristics, operating difficulties and safety risks of long-span pipeline bundle hoisting, carry out special skills training for personnel, standardize and standardize operating procedures, and improve the practical ability of operators and the level of emergency response to sudden working conditions.

Conclusion

A 20-ton gantry crane equipped with hydraulic telescopic hoisting beams is suitable for hoisting and transshipment of heavy pipes such as long pipes and steel pipe bundles.Through a stable door structure, hydraulic telescopic adjustment and load balancing design, problems such as uneven force, pipe damage and specification adaptation in traditional hoisting can be improved.

While ensuring the safety of hoisting, it improves operational efficiency. It is suitable for steel pipe manufacturing, oil and gas storage, ports and pipe processing scenarios.Henan Mine Crane can provide corresponding gantry crane configuration and technical support according to different working conditions to help users optimize pipe hoisting solutions.

In the lifting, transshipment and precise alignment of 20-ton heavy objects in heavy industrial plants, the 20-ton double-girder bridge crane is a stable and efficient core equipment.The selection of equipment cannot only focus on the rated load and the double-beam infrastructure. The parameters such as the lifting height, span, working level, and trolley layout of the hook adapted to the working conditions of the plant are the key to determining the adaptability and operating efficiency of the equipment.

This article is a professional selection guide for 20-ton double-girder bridge cranes. It systematically explains the equipment structure, hook height optimization, core parameters, safety configuration, installation and maintenance, selection misunderstandings and procurement lists. It can provide accurate and practical selection reference for supporting new plant equipment and upgrading old plant equipment.

What Is a 20t Double Girder Overhead Crane

The core structure of the double-girder bridge crane is a rigid bridge frame composed of two parallel main beams and end beams, which spans the working area of the plant and can walk along the longitudinal track of the plant, cooperating with the horizontal operation of the lifting trolley to complete the lifting and translation operations of heavy objects.The core components of the complete set of equipment are as follows：

• Parallel double main beam: The core load-bearing body of the equipment adopts rolled steel or welded box structure to carry all lifting loads, greatly improving the structural rigidity and operating stability of the whole machine, and adapting to 20 tons of heavy-duty working conditions.
• End beam and operating track system: connect the two ends of the double main beam and match the walking wheel assembly to support the smooth reciprocating operation of the entire crane along the longitudinal track of the plant to ensure the walking accuracy and load-bearing balance of the cart.
• Electric hoist/lifting trolley: mounted on the top of the main beam track, it can walk accurately laterally along the main beam to realize the horizontal displacement and alignment adjustment of heavy objects, and flexibly adapt to the needs of multi-station lifting.
• The hook group and the lifting mechanism: directly connect to carry heavy objects, relying on the coordinated transmission of motors, reels, and wire ropes to smoothly complete the core operations of lifting, lifting, and dropping heavy objects. It is the core execution unit of lifting operations.
• Electrical control and safety system: integrated operation control, travel limit, safety protection, sound and light alarm and other multi-function modules to control the operation of the equipment throughout the process, avoid the risk of heavy-duty operations, and ensure the safe and compliant operation of the whole machine.

Compared with the single-beam structure, the overall stiffness of the double-beam bridge is stronger and the force is more uniform. It can be adapted to large-span, high-load, and high-frequency heavy-duty operation scenarios. It is the mainstream structural form of 20-ton lifting operations.

Core advantage

20 tons is a medium- and heavy-duty lifting load. The structural strength and stability of a single-girder crane are difficult to adapt to this working condition for a long time, while the double-girder structure relies on its unique design advantages to perfectly match the 20-ton material handling requirements.：

• Excellent structural rigidity: the symmetrical bearing structure of the double main beam can effectively suppress the deformation and deflection deviation of the bridge frame during operation, and the rigidity, deformation resistance and smooth operation of the whole machine are better than that of single-girder cranes, and it is suitable for long-term heavy-duty working conditions.
• Suitable for large-span and heavy-duty working conditions: The structure has sufficient carrying margin, can be adapted to the layout of the large-span plant, and stably carries a rated load of 20 tons, which perfectly meets the needs of high-frequency handling and assembly of large components and heavy machinery and equipment.
• Higher effective lifting height: the hooks are embedded in the gap position of the double main beam, which is different from the external structure of the single beam, which greatly frees up the vertical working space, maximizes the use of the headroom of the plant, and realizes a higher effective lifting stroke of the hook.
• Strong stability in heavy-duty operation: the whole machine has a small amount of shaking during operation and high load alignment accuracy. It can adapt to high-intensity and continuous heavy-duty material handling operations, with low equipment failure rate and stronger adaptability to working conditions.

Typical application scenarios

The 20-ton double-girder bridge crane has a sturdy structure, sufficient load and stable operation. It has the core advantages of high effective lifting height and high safety redundancy. It can be adapted to large-span, large-workpiece, and high-intensity heavy-duty continuous operation conditions. It is not limited by complex production scenarios and is widely used in various heavy-duty industrial fields. Core application scenarios include：

• Steel structure processing workshop: suitable for the loading, transportation, unloading and finished product stacking of heavy raw materials such as large steel components, steel beams, steel columns, steel plates, etc., to meet the high-frequency hoisting needs of large-size and heavy-weight workpieces.
• Large-scale machinery manufacturing plants: used for parts handling, assembly line assembly, and finished product transportation of heavy machine tools, construction machinery, and complete sets of equipment to ensure the stability and accuracy of precision equipment assembly.
• Foundry workshop: it can withstand harsh working conditions such as high temperature and dust in the workshop, and is suitable for the lifting operations of large castings, steel castings, molds and smelting supporting equipment, and is suitable for harsh heavy-duty production environments.
• Shipyard area: to meet the cross-station transfer and assembly hoisting of hull components, marine supporting heavy equipment, and large segmented structures, and to adapt to the needs of large-span and high-lifting operations.
• Prefabricated concrete component factory: it is specially used for the release, displacement, storage and loading and transportation of prefabricated wall panels, beams and columns, and large concrete components. It has strong carrying capacity and stable operation, and is suitable for mass production conditions.
• Heavy equipment assembly workshop: for the whole machine assembly, alignment installation, and test machine displacement of large-scale heavy industry equipment, electric power equipment, and mining machinery, it effectively solves the problem of precise assembly of heavy and large parts.
• Oversized and heavy-duty cargo storage workshop: responsible for the warehousing and storage of heavy-duty finished products, large-scale spare parts, and industrial raw materials, outbound loading, and cross-regional transshipment, greatly improving the material turnover efficiency of heavy-duty warehousing.

The equipment can efficiently complete the lifting, assembly, and transshipment of steel coils, large castings, prefabricated components, heavy machinery and equipment, and other materials. It is the core supporting equipment for heavy industrial production.

Understanding Optimal Hook Height in a Heavy Industrial Bay

The lifting height of the hook (also known as the lifting height) refers to the vertical distance from the ground of the plant to the centerline of the hook when the hook rises to the highest point.When selecting the type, it is necessary to strictly distinguish between the rated lifting height and the actual available lifting height.：

The rated height marked in the equipment sample is the theoretical parameter, and the roof structure of the plant, the height of the track, the thickness of the main beam, the size of the trolley, the volume of the hook group and the safety gap will compress the actual available vertical working space, and there is usually a significant gap between the two.

The importance of hook lifting height

Reasonable hook lifting height is the key to ensuring efficient operation of the workshop, which directly determines the vertical space utilization rate of the workshop. The core value is reflected in：

• Revitalize the plant space: relying on precisely adapted lifting parameters, the vertical space utilization rate of the plant can be deeply tapped, and the hoisting of ultra-high-size workpieces can be efficiently completed without the need to transform the original plant structure, and the adaptability is extremely strong.
• Ensure operation safety: smoothly lift all kinds of ultra-high and heavy-duty workpieces, effectively avoid the risk of collision between the workpieces and the equipment body and the building structure of the plant, eliminate the safety hazards of high-altitude hoisting from the source, and ensure compliance and safety throughout the operation.
• Eliminate blind spots in hoisting: effectively avoid the problem of spatial interference between heavy objects and various machinery and equipment in the workshop and station facilities, completely remove obstacles to hoisting and blind spots in operation, and realize hoisting operations without dead ends.
• Improve production efficiency: comprehensively optimize the entire operation process of material handling, equipment assembly, and cross-station transfer, streamline redundant processes, shorten hoisting cycles, and greatly improve the overall heavy-duty operation efficiency of the workshop.

Hook lifting height and plant clearance

The total height of the plant is not equal to the available lifting height of the crane. From the headroom of the plant to the actual lifting height of the hook, a number of structural space needs to be deducted. The core influencing factors are as follows：

1. Roof structure: The top truss, load-bearing steel beam, roof roof and other components of the plant directly define the upper limit of the maximum vertical operation of the equipment, which is the primary condition that restricts the effective lifting space of the hook.
2. Track installation height: The actual erection elevation of the driving track determines the installation reference of the crane bridge, which directly locks the vertical operation baseline of the whole machine, affecting the overall lifting margin.
3. Main beam height: The structural thickness of the double-beam main beam will fixedly occupy a part of the vertical headroom of the plant, further compressing the actual effective lifting stroke of the hook.
4. Hoist and trolley structure: The structural size gap between conventional trolleys and low-headroom compact trolleys is obvious, which has a great impact on the vertical space occupation, and is the core controllable factor for optimizing the lifting height.
5. Hook group size: The structure of the hook group adapted to 20 tons of heavy-duty working conditions is too large, which will occupy part of the vertical lifting space, directly reducing the actual lifting height of the operation.
6. Safety reserved gap: The safety spacing between equipment, workpieces and plant structures that are mandatory to be reserved by industry specifications cannot be reduced at will. It is a necessary loss parameter for calculating the effective lifting height.

For conventional 20-ton double-girder wire rope bridge cranes, the clearance under the track needs to be not less than 5.5 meters. If the total height of the plant is only 6 meters and there is excess structural shielding, it will lead to a serious shortage of actual available lifting height, which cannot meet the needs of heavy-duty operations.

How to Determine the Right Hook Height for a 20t Crane

Actual required lifting height

The calculation of the lifting height of the hook needs to be based on the actual operating needs, abandon the one-sided method of simply referring to the parameters of the plant, and accurately count the four core working condition data to provide a reliable basis for parameter customization.：

1. The maximum height of the workpiece: the maximum vertical dimensions of various types of workpieces to be hoisted in the workshop；
2. Workpiece safety clearance: After the workpiece is lifted into place, the minimum vertical safety distance reserved to avoid obstacles at the top；
3. Transit span height: The maximum vertical height of various types of equipment and tooling that need to be crossed during the transit of workpieces across stations；
4. Site equipment height: The highest vertical elevation of all fixed equipment and tooling facilities on the workshop floor.

By superimposing the above four parameters and calculating them, the minimum hook lifting height required for the operation can be obtained. On this basis, reasonable safety redundancy is reserved. The final parameters can be used as the core benchmark for crane customization and selection, which is fully adapted to the heavy-duty hoisting conditions of the workshop.

Existing clearance conditions of the plant

It is necessary to accurately survey the overall vertical space of the plant and comprehensively investigate all kinds of top shelter structures.Focus on measuring the vertical height from the ground to the bottom of the roof truss and from the ground to the centerline of the track beam.

At the same time, the installation height of top obstacles such as lighting equipment, ventilation pipes, and various pipelines is counted.Such facilities will occupy effective operating headroom. Only by comprehensive survey and statistics can the actual available lifting height of the crane be accurately calculated.

Confirm the core parameters

In the selection process, it is necessary to accurately distinguish the three core parameters, avoid the problem of parameter confusion and blindly high matching, and reasonably control the cost of equipment. The professional interpretation of each parameter is as follows：

• Lifting height: Refers to the complete vertical stroke that the hook can run, that is, the vertical distance from the lowest working position of the hook to the highest limit position, which is the core parameter that determines the height of the lifting operation.；
• Headroom height: Specifically refers to the vertical spacing from the top surface of the track to the bottom of the load-bearing structure at the top of the plant, which is a hard plant condition that restricts the effective lifting space of the crane.；
• The limit proximity distance of the hook: The minimum horizontal distance at which the centerline of the hook can be close to the end of the track directly determines the operating coverage of the equipment against the wall and against the station.

Do not blindly increase the lifting height parameters. Excessive configuration will increase the main beam specifications, hoist power, and wire rope usage, increase equipment procurement and operation and maintenance costs for no reason, and fail to adapt to the headroom restrictions of the plant, resulting in a waste of resources.

Key Specifications for a 20t Double Girder Overhead Crane

The 20-ton double-girder bridge crane supports the customization of working conditions and parameters, and is suitable for various heavy industry scenarios.The working level of the equipment is A3-A7, the working temperature is -25℃~40℃, and the European-style structure is optional to improve the stability.The following are the general standard parameters, which can be used for reference in procurement and selection：

Parameter item	General parameter range/value	Remarks
Rated lifting weight	20 tons (20000kg)	Rated load of the main hook, optional auxiliary hook
span	10.5m – 31.5m	Can be customized according to the opening of the factory
Lifting height	6m-30m or more	It is necessary to distinguish between the rated height and the actual available height
Track length	Customized on demand	Match the total length of plant operations
Main lifting speed	0.5 – 8m/min	Frequency conversion and speed regulation are recommended for smoother operation
Trolley running speed	2 – 40m/min	Can be adjusted according to the operating accuracy
Cart running speed	10 – 80m/min	Adapt to different track length working conditions
Work level	A3 – A7（ISO）/ B-F（CMAA）	Determined by operating frequency and load conditions
Power supply method	380V/415V/480V, three-phase, 50/60Hz	Matching factory power supply standards
Control method	Handle control/wireless remote control/cab control	Choose according to working height and working conditions
Minimum approach distance of hook	300 – 600mm	Adapt to the operation requirements of the wall station
Operating ambient temperature	-25℃ ~ +40℃	Special configuration can be customized for extreme environments
Executive standard	ISO, FEM, CMAA, GB, EN	Follow local industry norms
Single wheel wheel pressure	Changes with span and main beam design	Used for plant track and infrastructure design

Safety Features for 20t Heavy-Duty Overhead Cranes

The safety system is the core standard configuration of heavy-duty cranes and is not an optional accessory. A full set of protective devices can effectively avoid the risks of heavy-duty operations and ensure the safety of personnel and equipment. The core safety configuration and functions are as follows：

• Overload protection device: dedicated load protection mechanism, real-time monitoring of hoisting weight, automatic triggering of sound and light alarms when the equipment is overloaded, and locking the lifting mechanism at the same time, prohibiting overloading operations, and eliminating safety accidents such as deformation, falling objects, and collapses caused by overload from the root cause.
• Upper and lower limit switches: accurately control the lifting limit stroke of the hook, effectively prevent the hook from rushing to the top and falling hook failure, avoid excessive tightening or relaxation of the wire rope, off-groove, wear and fracture and other problems, and ensure the stable operation of the lifting mechanism.
• Emergency stop device: equipped with a one-button emergency stop function, when encountering sudden dangers such as equipment failure, personnel intrusion, material shaking, etc., the operation power of the whole machine can be instantly cut off, all operating actions can be terminated, and the risk-averse stop loss can be quickly avoided.
• Walking limit switch: limit the operating boundaries of the cart and trolley separately, prevent the equipment from traveling over the range, effectively avoid the crane hitting the limit stops at both ends of the track, and prevent the fuselage from shaking, structural damage, and material offset.
• Anti-collision system: adapted to the working conditions of multi-machine shared track, through induction monitoring of equipment spacing, automatic early warning or restricted operation, to avoid collisions during multiple crane operations, and to ensure the safety of multi-equipment parallel operations.
• Sound and light alarm device: Sound and light warnings are continuously issued during the start and stop, operation and failure of the equipment, and on-site operators and inspectors are reminded to avoid the work area in a timely manner to avoid safety hazards caused by human-machine interference.
• Braking system: Adopts a high-reliability braking structure. When the equipment is powered off, fails to stop or the operation is stopped, the load can be instantly locked, and the position of heavy objects can be firmly fixed to prevent the risk of heavy objects slipping and falling.
• Multiple control modes: it supports three control modes: handle, wireless remote control, and cab. It can be flexibly switched according to operating height, operating conditions, and operating accuracy, and can be adapted to complex operating scenarios, greatly improving operation convenience and safety.

How Optimal Hook Height Improves Workshop Productivity

Maximize the use of vertical space

The precisely matched lifting height of the hook can be fully adapted to the lifting needs of the highest-size workpieces in the workshop. There is no need to transform the plant structure and split the workpieces. The lifting of ultra-high materials can be completed at once to avoid production capacity bottlenecks.

Improve the alignment accuracy of heavy objects

Sufficient lifting space allows the operator to freely adjust the height of heavy objects, and accurately complete high-precision operations such as equipment assembly, component alignment, mold installation, etc., without the need to temporarily raise and adjust the tooling, greatly improving the assembly accuracy and operation quality.

Reduce material handling restrictions

The double-beam structure hook can run close to the end of the track, with a minimum proximity distance of as low as 300mm, and can directly complete the lifting of heavy objects next to the wall station and equipment, avoiding the problem of space interference, and covering all working areas of the workshop.

Optimize the overall workflow

A reasonable lifting height can realize the smooth operation of the whole process of materials from storage, transportation, processing to assembly, without the need to repeatedly adjust the lifting plan, simplify the operation process, shorten the handling cycle, and comprehensively improve the overall production capacity of the workshop.

Common Mistakes When Specifying a 20t Overhead Crane

Various problems such as poor adaptability of workshop cranes, low operating efficiency, and frequent failures are mostly due to misjudgment of parameters and configuration misunderstandings in the early selection.In order to help users select types scientifically and avoid hidden dangers, the main points of high-frequency selection and pit avoidance in the industry are as follows：

• Single focus on the rated load: the selection only focuses on the rated lifting weight of 20 tons, ignoring the core parameters such as the lifting height of the hook, the span of the plant, and the working level of the equipment, resulting in a serious mismatch between the equipment and the actual working conditions, which cannot meet the production needs.
• Misjudgment of the effective headroom of the plant: The total height of the plant is purely used as the basis for selection, and the height of the track installation, the thickness of the main beam structure, and the space occupied by various equipment are not deducted. The actual available lifting headroom is overestimated, resulting in limited operation after the installation of the equipment.
• Redundancy of optional hoist specifications: blindly choose large-size hoists, which take up a lot of additional vertical working space, directly compress the effective lifting stroke of the hook, and waste the inherent headroom resources of the plant.
• Ignoring obstacles to blocking the top: Obstacles such as roof trusses, ventilation pipes, and lighting fixtures are ignored during the survey phase, and problems such as hoisting interference and inability to operate at full load occur after the equipment is installed, which greatly reduces the practicality of the equipment.
• Ignore the proximity performance of the hook: The limit proximity distance parameters of the hook are not considered, and the equipment cannot cover corner stations such as leaning against the wall and equipment. There are fixed blind spots and insufficient coverage of workshop operations.
• Improper selection of working level: the working level is determined only based on the maximum lifting load, and the selection is not combined with the frequency of daily operations and the length of continuous heavy loads, resulting in long-term overloaded operation of the equipment, early aging, and rising failure rate.
• Lack of long-term adaptation planning: the selection only meets the current production needs, and the adaptation space for capacity upgrading and workpiece size iteration is not reserved. The versatility of the equipment is poor, and it is difficult to adapt to the expansion and transformation of the workshop in the later stage.

Installation and Maintenance Considerations

Pre-installation survey and evaluation

Before the equipment enters the field, it is necessary to complete a comprehensive survey: test the load-bearing capacity of the plant’s columns, roofing, and infrastructure; verify the existing track specifications, flatness, and alignment accuracy; confirm the power supply voltage and capacity of the plant; accurately measure all headroom dimensions and obstacle locations to ensure that the equipment can be installed smoothly and operate in compliance.

Equipment commissioning and acceptance

After the installation is completed, it must be debugged and accepted in strict accordance with industry standards, and then complete the no-load test operation, static load test, and dynamic operation test in turn, and perform overload detection according to 125% of the rated load.

Comprehensively verify the structural strength, braking performance, limit device, safety system, and smooth operation. All test data are archived and retained as the basis for the compliance operation of the equipment.The acceptance of equipment must comply with the corresponding industry specifications such as ASME, EN, GB, etc.

Preventive regular maintenance

• Wire rope and hooks: Normalize the inspection of wire rope wear, broken wire, corrosion, hook deformation, cracks and other loss problems, and replace aging and failed accessories in time to eliminate hidden dangers of lifting and carrying.
• Braking system: regularly check the wear thickness of the brake pads and the accuracy of the brake clearance, adjust the braking performance, ensure that the locking is stable and reliable when the equipment starts and stops, and the risk of slippage and slippage is eliminated.
• Gear box and walking wheels: check the oil level and oil status of the lubricating oil of the gear box, investigate wheel wear, stagnation, deviation and other faults, and ensure the smooth operation and smooth transmission of the walking mechanism.
• Electrical system: Comprehensively detect the working conditions of frequency converters, contactors, circuits and grounding devices, investigate hidden dangers such as circuit aging, poor contact, and grounding failure, and avoid electrical failures and safety risks.
• Equipment structure body: regularly inspect the core structures such as main beam welds, connecting bolts, and bridge arches to investigate hidden dangers of structural fatigue, loosening, and deformation to ensure the structural stability of the whole machine.
• Regular lubrication of components: regularly fill bearings, reels, gears and other motion transmission components with lubricating grease to reduce mechanical friction losses, extend the service life of equipment, and reduce the probability of abnormal operating noise and failure.

Conclusion

The 20-ton double-girder bridge crane is not a simple standardized equipment. The key to its performance lies in the precise matching of load, span, headroom, lifting height and operating frequency.Reasonable optimization of hook height and overall configuration can make full use of plant space, improve hoisting efficiency and reduce long-term operation and maintenance costs.

When selecting the model, you should avoid only looking at the rated load of 20 tons, but customize the design based on the actual working conditions.Henan Mine Crane can provide customized solutions for 20-ton double-girder bridge cranes according to plant structure and operating needs to help customers achieve safe, efficient and stable heavy-duty handling.

Outdoor steel yards and steel structure processing sites generally face the difficult working conditions of long-span operations, heavy-duty material hoisting, and all-weather open-air construction, and have extremely high requirements for crane carrying capacity, structural stability, and environmental adaptability.Relying on high-quality double-girder structure design, the 20t double-girder gantry crane has strong bearing capacity, deformation resistance, and excellent wind and weather resistance. It can stably complete the transportation and loading and unloading of heavy steel such as steel plates, steel components, and profiles, and effectively solve the problems of shaking, deformation, and poor safety in long-span floating operations. It is the core main lifting equipment for steel yards to improve operating efficiency, ensure construction safety, and reduce operation and maintenance losses.

Why Choose a 20t Double Girder Gantry Crane for Steel Yards?

Heavy load handling

The core pain points of steel yard operations are large material loads, high density, and complex hoisting conditions. Ordinary light cranes cannot meet the needs of high-frequency and heavy-duty operations.The rated load of Henan Mine Crane manufactured 20t double-girder gantry crane is accurately adapted to the mainstream hoisting needs of small and medium-sized steel yards, and can stably carry heavy-duty materials such as steel plates, steel coils, shaped steel, and prefabricated steel components. It is compatible with continuous operation at full load and complex working conditions such as partial load and intermittent heavy load.

The crane adopts a double-main beam box load-bearing structure, with a professional load balancing design, and optimized calculations by finite element mechanics to effectively disperse the single-point lifting pressure and eliminate the deformation, sagging, fatigue damage and other problems of the main beam caused by long-term heavy-duty operations.Different from the short board of single-girder cranes with insufficient bearing capacity and severe heavy-duty shaking, the 20t double-girder gantry crane can achieve smooth lifting, translation, and positioning of the rated load of 20 tons, with high positioning accuracy and large operating fault tolerance. It is perfectly adapted to the large-volume and high-intensity hoisting operation rhythm of the steel yard, greatly improving the efficiency of material turnover.

Outdoor operating conditions

The outdoor steel yard is not shaded by a closed factory building, and faces harsh working conditions such as high winds, heavy rains, high and low temperatures, sand and dust, and large temperature differences between day and night all year round. The weather resistance, environmental adaptability, and operating stability of the crane are extremely demanding.Ordinary indoor crane modification equipment is prone to paint corrosion, loose structure, electrical failure, wind shaking and other problems, which not only affects production, but also has major safety risks.

The 20t double-girder gantry crane is specially customized and optimized for outdoor open-air scenes. The whole machine adopts Q345B high-strength structural steel and is processed by automatic submerged arc welding process to eliminate residual welding stress and has excellent deformation, corrosion and fatigue resistance.The equipment is adapted to a wide temperature operating environment from -20℃ to 40℃, and is equipped with outdoor special waterproof, dustproof, and lightning-proof electrical systems. All wiring ports and control boxes are sealed and protected to resist outdoor sand, dust and rain erosion.At the same time, the operating logic is optimized for different working conditions of outdoor windless, light breeze, and strong wind, and the operation is stable at low speed and stable at high speed. It completely solves the pain points of easy failure, poor stability, and high failure rate of outdoor equipment, and realizes uninterrupted operation all year round.

Double girder advantages

The double-beam structure is the core advantage of Henan Mine Crane manufactured20t gantry crane for long-span and high-stability operations in steel yards, and it is also a key highlight that distinguishes it from single-beam gantry cranes.The single-girder crane has a thin structure and insufficient rigidity. It is prone to tremor of the main beam and shaking of the fuselage during long-span operations, which cannot meet the precise hoisting needs of heavy steel, and long-term use is prone to structural aging, deformation and failure, and its service life is greatly shortened.

The symmetrical box structure design of the double main beam greatly improves the bending, torsional and deformation resistance of the whole machine, and the structural rigidity and overall stability are doubled and upgraded.Under the same span conditions, the double-beam equipment runs more smoothly and the load distribution is more uniform, which can support longer site span coverage and adapt to the global operation needs of large steel yards.At the same time, the double-beam structure reserves sufficient equipment installation space, and can be equipped with upgraded configurations such as double hoists, frequency conversion speed regulation, intelligent limit, and remote control, which have greater operational flexibility and functionality.In terms of service life, safety factor, and operation and maintenance convenience, the double-beam models far exceed the single-beam equipment of the same specification, and are a cost-effective choice for long-term stable production in outdoor steel yards.

Key Structural Features of a 20t Gantry Crane

Main girder design

The main beam is the core load-bearing component of the Henan Mine Crane manufactured 20t double-girder gantry crane, which directly determines the long-span carrying capacity and operating stability of the equipment.The crane adopts the national standard high-strength box-shaped double main beam structure, abandoning the traditional simple welding process, and is integrated by automatic submerged arc welding. The welds are uniform and dense, and the structural integrity is extremely strong, so as to avoid hidden dangers such as cracking and desoldering of the main beam from the root cause.

In the production stage, the precise upper arch of 1.2‰ will be preset according to the crane span, which will perfectly offset the downward deflection deformation caused by heavy-duty hoisting, ensuring that the main beam remains horizontal during full-load operation, and eliminating material shaking and hoisting offset problems.At the same time, reinforced ribs and reinforced partitions are added inside the main beam to further enhance the rigidity of the structure and effectively resist the torque, pressure and wind impact in long-span operations.The surface of the main beam has undergone dual treatment of rust removal and anti-corrosion spraying, which is resistant to outdoor corrosion and wear resistance. It is not easy to rust and age during long-term open-air operations, which greatly extends the service life of the equipment and reduces the cost of late maintenance.

Leg and support structure

The outriggers and support structure are the key structures to ensure the stability of the long-span Henan Mine Crane manufactured gantry crane and resist the interference of outdoor external forces.The 20t double-girder gantry crane adopts a standardized U-shaped/tubular reinforced outrigger design with an integrated welded base. The structure has strong load-bearing capacity and uniform force, which can perfectly withstand the heavy-duty pressure transmitted by the main beam and the outdoor horizontal wind.

The outriggers adopt segmented reinforcement technology, and the key force parts are thickened to eliminate the tilt, deformation, and loosening of the outriggers caused by long-term heavy loads and windy weather.At the same time, the outriggers, the main beam and the walking base are fixed by high-strength bolts and welding, which are tightly connected without gaps, and the integrity of the whole machine is extremely strong.For long-span models, the spacing of the outriggers has been accurately calculated by mechanics, which greatly improves the anti-overturning ability of the whole machine. Even under unilateral heavy loads and strong horizontal winds, the fuselage can still be kept stable, and the safety of outdoor steel yard operations is guaranteed in all directions.

Lifting mechanism

The lifting mechanism is the core execution unit of equipment operations, which directly affects the stability, accuracy and operating efficiency of hoisting.The 20t double-girder gantry crane is equipped with an industrial-grade special hoist/winch system, which is suitable for the needs of 20-ton heavy-duty and high-frequency hoisting. The lifting speed is stable, the braking is accurate, and there is no slip hook or caton problem.

The crane adopts a frequency conversion speed control system, which can freely switch between fast and slow speeds, and the heavy-duty lifting buffer is stable, effectively avoiding the shaking of the fuselage and material swing caused by instant start and stop, and greatly improving the stability of long-span operations.At the same time, it is equipped with multiple safety protection devices, including overload limit, lifting height limit, travel limit, and emergency braking device. In the event of hidden dangers such as overload, over-travel, and abnormal shaking, the equipment can be stopped immediately for protection.All core accessories of the lifting mechanism are made of wear-resistant, high-strength industrial accessories, which are suitable for harsh outdoor working conditions, with low failure rate and strong durability to ensure long-term continuous and stable operation.

How to Ensure Stability in High-Span Gantry Cranes

Span and load distribution

Large span is an essential attribute of outdoor large-scale steel yard cranes, but the larger the span, the more complex the force of the equipment, and the more prone it is to uneven force, local deformation, and fuselage shaking. Therefore, span planning and load distribution are the core foundations of stable operation.The 20t double-girder gantry crane supports customization of large spans of 5-40 meters. All span parameters have been calculated by professional mechanical simulation to match the corresponding main beam specifications, outrigger spacing and structural reinforcement scheme to eliminate the safety risks caused by blind large-span design.

The crane adopts a symmetrical load distribution design, and the double main beams evenly distribute the lifting weight to avoid structural tilt and deformation caused by excessive force on one side.At the same time, the force balance is adjusted in real time through the intelligent control system during the operation, and the load distribution is automatically optimized for different working conditions such as midpoint hoisting and offset hoisting to ensure consistent hoisting stability throughout the span.In addition, the equipment strictly follows the rated load operation standards, eliminates long-term overload and partial load operations, and cooperates with reasonable span adaptation schemes to ensure the structural stability of large-span working conditions from the two dimensions of design and use.

Wind resistance

The outdoor steel yard is unobstructed. Windy weather is the main factor affecting the stability of gantry cranes and causing safety accidents. Wind resistance design is the core technical focus of long-span models.The 20t double-girder gantry crane has been optimized for all-round wind resistance in outdoor wind conditions. The structure of the whole machine adopts a streamlined mechanical design, which effectively reduces wind resistance and reduces the impact of horizontal wind on the fuselage.

The equipment is equipped with professional windproof devices, including track clamps, windproof anchoring devices, and wind monitoring alarms, which can monitor outdoor wind speed in real time. When the wind speed exceeds the safe operating threshold, it will automatically warn and lock the walking mechanism to prevent the crane from sliding and shaking with the wind.The long-span main beam and outrigger structure have been reinforced and optimized for wind resistance, and the overall wind resistance level meets the standards of outdoor open-air operations, which can withstand conventional windy weather.At the same time, for strong wind areas such as coastal and wilderness areas, enhanced windproof configurations can be customized, windproof brackets and locking systems can be upgraded, and equipment stability and operational safety under harsh wind conditions can be improved in all directions.

Rail and foundation design

The track and foundation are the basic carriers for the stable operation of the Henan Mine Crane manufactured crane. Insufficient foundation bearing capacity, uneven track laying, and weak fixation will directly cause the operation of the long-span crane to shake, tilt the fuselage, and fatigue damage to the structure, seriously affecting the safety of operations and equipment life.The 20t long-span double-girder gantry crane has standardized and specialized supporting requirements for foundation and track design.

The foundation needs to be reinforced and poured with concrete according to the span, weight, and rated load of the equipment to ensure uniform load-bearing, no settlement, and no cracking of the foundation, and to eliminate the hidden dangers of the tilt of the fuselage from the bottom.The track adopts national standard heavy-duty steel rails, which are adapted to the needs of 20 tons of heavy-duty walking. The track is accurately leveled and the spacing is calibrated throughout the laying process, and the fixing bolts are encrypted and reinforced to ensure that the track is straight and stable, with no offset and no loosening.At the same time, it is equipped with track limits and cushioning devices to avoid the vibration and structural damage of the fuselage caused by over-range and collision of the equipment.The standardized foundation and track design can maximize the structural performance of the equipment and ensure the stability and stability of long-span and long-distance walking operations.

20t Double Girder Gantry Crane Price and Customization

Main cost factors

There is no fixed standard for the market price of 20t double-girder gantry cranes. It is mainly affected by the four core factors of core configuration, structural parameters, material technology, and functional upgrade. The price gap between different configurations of equipment is significant.The first is the span and lifting height. The larger the span and the higher the lifting height, the more materials are used for the main beam and outriggers, the higher the process requirements, and the simultaneous increase in equipment costs are the core factors affecting pricing.

The second is the steel material and production process. The cost difference between ordinary carbon steel and Q345B high-strength anticorrosive steel is large. High-end processes such as automatic welding, precision machining, and anticorrosive spraying will slightly increase the cost, but the stability and service life of the crane can be greatly improved.In addition, the electrical and safety configuration, ordinary contactor control and frequency conversion intelligent control, basic safety protection and a full set of intelligent early warning system, the price gap is obvious.Finally, there is the operating level. The conventional working conditions of A5 are different from the heavy-duty continuous operating level of A6-A7. The configuration standards of the core accessories are different, which directly affects the overall cost of the crane.

Custom design options

In order to adapt to the site size, operating conditions, and production needs of different steel yards, the 20t double-girder gantry crane supports full-dimensional personalized customization, which can accurately match various outdoor operation scenarios.In terms of structure, different spans, lifting heights, and cantilever lengths can be customized to adapt to large and small yard sites; in terms of working conditions, the heavy-duty operation configuration can be upgraded to meet the needs of high-frequency and continuous heavy-duty operations and adapt to high-intensity production scenarios.

In terms of functions, it supports upgraded configurations such as frequency conversion speed regulation, remote wireless control, intelligent weighing, wind speed monitoring, fault self-diagnosis, and unattended intelligent operation to improve operational efficiency and intelligence.In terms of environmental adaptation, special models for enhanced anti-corrosion, high temperature resistance, low temperature resistance, and strong wind resistance can be customized to adapt to special outdoor scenes such as coastal, wilderness, alpine, and high temperature.At the same time, special spreaders and anti-skid devices can be customized according to the material type, and the steel hoisting operation experience can be optimized in a targeted manner.

Installation and delivery costs

The complete crane procurement cost not only includes the price of the equipment body, but also covers supporting costs such as transportation, installation, commissioning, and after-sales.Transportation costs are mainly calculated based on the size, weight and transportation distance of the equipment. Large-span models are large-scale equipment, and the transportation cost is slightly higher than that of conventional equipment. Manufacturers can provide nationwide logistics and distribution services to ensure the safe and lossless delivery of equipment.

The installation and commissioning costs include on-site foundation docking, track calibration, equipment assembly, system commissioning, safety testing and other full-process services. Professional manufacturers are equipped with licensed installation teams and operate in strict accordance with national standard construction standards to ensure equipment installation accuracy, stable operation, and compliance with standards.At the same time, regular manufacturers will provide free technical guidance, acceptance and docking, operator training services, and follow-up long-term warranty, maintenance, and parts replacement after-sales support, greatly reducing users’ later operation and maintenance costs, and realizing one-stop procurement and worry-free use.

Henan Mine Crane Factory Custom

With its powerful heavy-duty capacity, extreme outdoor environmental adaptability, and stable long-span structural performance, the 20t double-girder gantry crane has become an indispensable core lifting equipment for outdoor steel yards.The exclusive double-beam structure, scientific span load design, all-round wind-resistant stability scheme, and standardized foundation track adaptation have solved the problems of operational stability under long-span, heavy-duty, and harsh outdoor working conditions in the steel yard in an all-round way.At the same time, Henan Mine Crane Factory‘s flexible customized solutions, transparent price system, and perfect supporting services can meet the equipment upgrade and procurement needs of enterprises of different sizes.For steel yard companies, choosing Henan Mine Crane Manufactured 20t double-girder gantry crane with stable structure, suitable configuration and reliable technology can not only improve material hoisting efficiency and ensure operation safety, but also reduce long-term operation and maintenance costs, and build a solid foundation for the stable operation of the production line.

The 100-ton high-precision heavy-duty hoisting scenarios in heavy industries such as large-scale infrastructure, shipbuilding, iron and steel metallurgy, electric power and energy have put forward strict requirements for the performance of lifting bridge cranes, and conventional lifting bridge cranes are no longer able to adapt to the needs of complex working conditions.The 200-ton super-heavy bridge crane is suitable for high-frequency, high-load, and high-stability hoisting operations. It relies on a reinforced load-bearing structure and an exclusive customized beam system to effectively solve industry problems such as uneven lifting force, load offset, and poor stability. It is the core main equipment for the transfer of heavy-duty components and the installation of bridge cranes for various large-scale heavy-industry projects.

200t Overhead Crane Specifications for Ultra-Heavy Lifting

Lifting capacity and load control

The 200-ton super-heavy bridge crane adopts the industry standard rated load design, and the rated lifting weight of the main hook can reach 200t. It can be equipped with 32t and 50t auxiliary hooks as needed, taking into account the main lifting of overweight and large parts and the auxiliary lifting of small and medium-sized components, and is suitable for multi-scene composite operation needs.The bridge crane strictly follows the GB/T 3811-2025 lifting machinery design specifications and is equipped with an intelligent load control system that supports real-time load acquisition, precise counterweight adjustment and dynamic load limit.The system can automatically identify the load fluctuations in the hoisting process, and make intelligent corrections for eccentric force and dynamic impact loads to eliminate the risk of overload and partial load operations.Compared with traditional lifting bridge cranes, its load control accuracy is increased by more than 90%, and it can achieve smooth start and stop of heavy objects of 100 tons without impact displacement, which is perfectly adapted to the lifting protection needs of large precision heavy-duty components.

Span and lifting height

In order to adapt to the large-space operation scenarios of large-scale factories, shipyards, and steel mills, the span of the 200t super-heavy bridge crane supports customized design from 10m to 35m. The commonly used spans for mainstream projects are 24m, 28m, 32m, and 36m, which can fully cover the space layout requirements of various heavy industry workshops and open-air work areas.The effective lifting height range of the bridge crane is 6m-30m. The main trolley and the auxiliary trolley can realize differentiated lifting height configuration, and the maximum lifting operation can be achieved at 24m ultra-high, which meets the requirements of high-level installation of large bridge cranes and stacking and transporting of heavy components.All spans and lifting heights can be non-standard customized according to the size of the customer’s site, the installation height of the bridge crane, and the operating process to maximize the use of operating space, avoid the operating blind spots caused by the height and span restrictions of the site, and adapt to the site working conditions of various large and medium-sized super projects.

Hoisting and travel speed

The core pain point of heavy-duty operations lies in the balance between speed and stability. The 200t super-heavy bridge crane adopts a graded adjustable operating speed design to completely solve the problem of heavy-duty start-stop shaking and large displacement deviation.The lifting speed range of the bridge crane is 0.5-10m/min, which automatically rises steadily at low speed under heavy load, and can run at high speed under no load, taking into account operation safety and construction efficiency.The operating speed of the cart is 10-40m/min, and the operating speed of the trolley is 5-30m/min. It supports stepless speed regulation and smooth variable speed throughout the process, without frustration.At the same time, it is equipped with a synchronous operation control system, and the error of multi-agency collaborative operation is ≤0.1mm, which can achieve ultra-long-distance and long-span accurate displacement, effectively improve the accuracy of alignment and installation of large components, and greatly reduce the rework rate of heavy lifting. , Suitable for high-frequency, high-precision, and heavy-duty continuous operation scenarios.

Duty class

In view of the characteristics of the high-frequency, high-intensity and long-term working conditions of super engineering, Henan Mine Crane manufactured 200t ultra heavy bridge crane is equipped with A6-A7 advanced working level as standard, which far exceeds the A3-A5 working condition level of ordinary industrial cranes. It is an exclusive configuration for harsh working conditions such as metallurgy, shipbuilding, and electric power.The A6-A7 heavy-duty working condition level means that the bridge crane can achieve 24-hour uninterrupted continuous operation, withstand harsh working conditions such as high temperature, dust, heavy-duty impact, frequent start and stop, and greatly improve the fatigue strength, wear resistance, and stability of the bridge crane.Compared with ordinary cranes, the service life of the bridge crane is extended by more than 30%, and the failure and shutdown rate is reduced by 60%. It is perfectly adapted to high-intensity operation scenarios such as molten metal transfer in steel workshops, segmented hoisting of large parts in shipyards, and maintenance of heavy-duty bridge cranes in power plants all year round to meet the continuous construction needs of super projects.

200t Overhead Crane Design for Megaprojects

Double-girder structure

The 200-ton super-heavy bridge crane adopts a heavy-duty double-main beam core structure, and some high-end engineering models adopt a four-beam and four-rail double-trolley reinforced structure, which completely subverts the carrying limit of ordinary double-girder cranes.The main beam adopts an integral welded box structure and uses Q420B high-strength alloy steel, which has the core advantages of high strength, high toughness, fatigue resistance and deformation resistance.The symmetrical layout design of the double main beam can evenly disperse the heavy-duty pressure of the 100-ton class, eliminating the problem of uneven force on the single beam and bending and deformation of the main beam.The structure has been optimized by finite element stress analysis, and the bending moment, shear force, and impact force during heavy-duty hoisting are strengthened in all directions. The rigidity of the whole machine is stronger, and the deflection deformation under no-load and heavy-load conditions is controlled within the minimum range of industry standards to ensure the structural stability of long-term high-intensity operations. It is the core structural guarantee of super heavy-duty engineering projects.

Heavy-duty hoisting system

The bridge crane is equipped with a customized heavy-duty lifting system, equipped with a large-diameter high-strength reel, thickened wear-resistant steel wire rope, a heavy-duty reducer and a special brake motor. The complete lifting mechanism has been designed with heavy-duty reinforcement and can withstand long-term impact operations with a rated load of 200t.The wire rope adopts a multi-layer winding and wear-resistant configuration, with anti-slotting and anti-wear protection devices, which greatly improves the service life of lifting accessories.The lifting system adopts hydraulic synchronous lifting technology, multiple lifting points work together, and the synchronization error is strictly controlled within 0.1mm, which can realize the overall smooth lifting of ultra-large components, and avoid the deformation of components and the tilt of hoisting caused by excessive single-point force.At the same time, the mechanism has overload self-locking and power-off protection functions, which can be locked instantly under sudden working conditions to eliminate the risk of heavy objects falling, and is suitable for all kinds of ultra-high-risk heavy-duty hoisting operations.

Load distribution design

In view of the problems of load concentration and local force exceeding that are prone to 100-ton heavy-duty hoisting, the 200t super heavy-duty bridge crane is equipped with a scientific load distribution design.Through the structural logic of symmetrical force on the double main beam, balanced load-bearing at multiple lifting points, and multi-point force transmission of the trolley, the concentrated load is evenly dispersed to the structure of the whole machine and the track foundation to avoid overload damage to the local structure.Cooperating with customized spreader beam, it can convert single-point hoisting loads into multi-point uniform forces, completely solving the problems of uneven force, local deformation, and tilt offset of large planar components and ultra-long and overweight bridge cranes during hoisting, and greatly improving the safety and component integrity of heavy-duty hoisting, especially suitable for precision heavy-duty components, large hull segments, and large steel structure modules. Lifting protection needs.

Structural reinforcement

In order to adapt to the extremely harsh working conditions of the super project, the bridge crane has undergone all-round structural strengthening treatment.The core force components such as the main beam, end beam, and trolley frame are welded with thickened steel plates, and the key welds are tested with non-destructive flaw detection to eliminate welding defects.Heavy-duty special accessories are selected for transmission load-bearing accessories such as walking wheels, bearings, pins, etc. to withstand high-frequency impact loads.At the same time, for special working conditions such as high temperature, dust, humidity, corrosion, etc., the surface of the bridge crane is sandblasted and rust-proof, anti-corrosion spraying treatment, and the core electrical components are equipped with dust-proof, waterproof, and high-temperature protective housings.The deformation, corrosion and fatigue resistance of the whole machine are fully upgraded, and it can adapt to harsh operating environments such as steel mills, shipyards, and outdoor infrastructure for a long time, greatly reducing the operation and maintenance costs of bridge cranes and improving the continuity of engineering construction.

Custom Spreader Beams for 200t Overhead Cranes

Spreader beam capacity

The customized distribution beam is the core supporting system of the 200t super heavy-duty bridge crane. It is specially developed for extreme heavy-duty hoisting of 200 tons. The rated carrying capacity exactly matches the host load, and can stably withstand 200t static load and dynamic impact load. Sufficient safety redundancy coefficient is reserved, which far exceeds the industry’s general safety standards.The beam has undergone professional load verification and can be adapted to various complex hoisting conditions such as full load, partial load, dynamic load, etc., to eliminate the risk of deformation, fracture, and instability of the beam.In view of the special lifting needs of oversized parts, the reinforced beam can be upgraded to improve the impact resistance and deformation resistance, and meet the lifting and carrying requirements of ultra-long, ultra-wide, and overweight special-shaped components. It is an indispensable core supporting bridge crane for large-scale heavy-duty precision hoisting.

Beam dimensions

The size of the distribution beam supports 100% non-standard customization, and can be accurately matched according to the length, width, weight, shape and structure of the hoisting components.The beam length interval of the conventional 200t crane is 6m-20m, and the cross-section height and width are optimized according to the carrying stress, taking into account the structural strength and lightweight characteristics, so as to avoid excessive beam weight and increase the load of the bridge crane.All beam sizes are optimized based on finite element simulation calculations, and customized for hoisting scenarios with different spans and different hoisting point spacing, which not only ensures the overall structural rigidity and carrying stability, but also avoids the waste of working space caused by dimensional redundancy, and is perfectly adapted to the exclusive hoisting needs of various large bridge cranes, steel structure modules, and hull segments.

Lifting point design

The customized distribution beam adopts a multi-hanging point modular design, and comes standard with 4 hanging points, 6 hanging points, and 8 hanging point layout. The spacing and force angle of the hanging points can be flexibly adjusted according to the structure of the workpiece, completely solving the disadvantages of single-point and double-point hoisting force concentration.The hanging point adopts high-strength forged lugs, one-piece molding without welded joints, stable load-bearing performance, and strong tensile and fracture resistance.The spacing of the hoisting points can be freely adjusted, supporting a variety of symmetrical and asymmetric hoisting layouts, and adapting to the hoisting needs of rectangular, special-shaped, ultra-long and overweight workpieces, effectively avoiding the tilt, distortion and deformation of the workpieces during the hoisting process, and ensuring the hoisting accuracy and integrity of precision heavy-duty components.

Load stability

The core value of customized beams is to greatly improve the load stability of heavy-duty hoisting. Through multi-point balanced force, lateral limit, and torque balance design, they can effectively offset the interference factors such as inertial shaking, wind offset, and load deviation during hoisting.Compared with the traditional direct hoisting method, with a customized beam hoisting system, the shaking amplitude of the workpiece is reduced by more than 85%, and the horizontal offset is controlled at the millimeter level.In high-altitude, long-span, and long-distance transportation operations, the horizontal stability of the workpiece can always be maintained, the problem of swing collision and position offset can be eliminated, and the accuracy of alignment and installation of large components can be greatly improved. At the same time, the safety risks of high-altitude heavy-duty operations can be reduced, and it is perfectly adapted to the high-precision and high-safety hoisting standards of super engineering.

Safety Systems for 200t Overhead Crane Operations

Overload protection

Henan Mine Crane manufactured 200t ultra-heavy bridge crane is equipped with multiple intelligent overload protection systems, which is the basic safety guarantee for heavy-duty operations.The bridge crane is equipped with high-precision load sensors to collect lifting weight data in real time. When the load is close to the rated load and there is a trend of overload, the system automatically warns with sound and light.Once the rated load is exceeded, mandatory shutdown and lifting instructions will be triggered immediately to eliminate the risk of overloading operations from the source.At the same time, it is equipped with a partial load protection function, which can monitor the deviation of the left and right, front and rear loads in real time, and automatically limit and correct the partial load hoisting, so as to avoid structural damage caused by eccentric force, tilt and fall of workpieces, and ensure the safety of bridge cranes and operations in all directions.

Emergency braking

The whole machine is equipped with multiple emergency braking systems, the lifting mechanism, the cart operating mechanism, and the trolley operating mechanism are all equipped with independent electromagnetic braking and mechanical braking dual protection devices, and the braking response speed is millisecond.During normal operation, the braking is stable and impact-free. In emergency situations such as sudden power failure, bridge crane failure, and personnel misoperation, all operating mechanisms can be locked instantly, and the position of heavy objects can be firmly fixed to prevent heavy objects from falling, bridge cranes from sliding, and collision accidents.The braking system has undergone millions of heavy-duty fatigue tests and is adapted to 200t heavy-duty impact conditions. The braking is stable without slippage and failure. It can cope with various emergency scenarios and provide ultimate safety protection for heavy-duty operations of super projects.

Load monitoring

The bridge crane is equipped with an intelligent real-time load monitoring system and a high-definition data display screen, which can visually display core data such as lifting weight, lifting height, operating speed, load distribution, and working conditions of the bridge crane in real time.The system supports full data recording, storage and traceability, can identify problems such as abnormal load, abnormal structural stress, and operating failures in real time, and simultaneously push early warning information.The operator can grasp the operation status of the whole machine in real time, and the background management system can remotely monitor the operation data of the bridge crane to realize visual control of the whole process of the operation, facilitate the operation and maintenance of the bridge crane, working condition analysis and safety traceability, and adapt to the standardized and intelligent safety management needs of large-scale engineering projects.

Safety testing

All 200t ultra-heavy bridge cranes have undergone rigorous all-round safety testing before leaving the factory, including rated load testing, 1.25 times overload static load testing, 1.1 times dynamic load testing, structural stress testing, braking performance testing, electrical system testing, safety device linkage testing and other complete processes.The core steel structure adopts non-destructive flaw detection to eliminate internal cracks and welding defects.All safety devices, transmission mechanisms, and electrical systems are checked one by one to ensure that the performance of the whole machine is up to standard.Henan Mine Crane manufactured bridge crane is shipped with a full set of inspection reports and qualification certificates. After the on-site installation and commissioning is completed, the heavy-duty trial operation of the whole machine will be tested again, and it can be put into use after passing the acceptance to ensure the safety, stability and compliance of each bridge crane.

200t Overhead Crane Applications in Heavy Industry

Shipbuilding projects

Shipbuilding is the core application scenario of 200t ultra-heavy bridge cranes. The weight of components such as large hull segments, bow, stern, cabin heavy bridge cranes, deck modules, etc. in shipyards generally reaches 100 tons, and conventional lifting bridge cranes cannot meet the lifting needs.The bridge crane is equipped with customized multi-lifting point distribution beams, which can realize smooth lifting of oversized hull segments and precise alignment splicing, effectively avoiding hull structure deformation and splicing deviation problems.The characteristics of bridge cranes with large span, high lifting and high stability are perfectly adapted to the large workshop working space of the shipyard. They can complete the whole process of hull assembly, bridge crane installation, component transfer, and finished product displacement. It is the core main equipment of large shipyards and ship-building super projects.

Steel manufacturing

The working conditions of the iron and steel metallurgical workshop are harsh, and the high temperature, dust, heavy-duty, and high-frequency operations are normalized. The 200t A6-A7 heavy-duty bridge crane is specially adapted for metallurgical scenarios and can complete the steel ladle, iron ladle transfer, large steel billet, steel plate, rolling bridge crane hoisting, steelmaking workshop heavy-duty bridge crane maintenance and other operations.Henan Mine Crane manufactured bridge crane has high temperature resistance, fatigue resistance, and strong continuous operation ability. With a load balancing system, it can eliminate the deformation and load offset of the bridge crane under high temperature and heavy load conditions, and ensure the continuous and stable operation of the steel production line. It is widely used in the core sections of large steel mills, rolling mills, and metallurgical foundries.

Power plants

For thermal power, hydropower, nuclear power, wind power and other power engineering projects, there are a large number of 100-ton heavy-duty bridge cranes hoisting operations, including the installation and maintenance of bridge cranes such as generator sets, steam turbines, transformers, large towers, and steel structures in computer rooms.Relying on the advantages of high precision, high safety and high stability, the 200t ultra-heavy bridge crane can complete the precise hoisting and alignment of the power core bridge crane to prevent collision damage to the precision bridge crane.Bridge cranes can be adapted to multi-scene working conditions such as indoor computer rooms and outdoor operating platforms of power plants, and can meet the heavy-duty hoisting needs of power engineering construction and bridge crane operation and maintenance around the clock. They are the key lifting equipment for power and energy super projects.

Infrastructure projects

Super projects such as large-scale bridges, rail transit, municipal hubs, and large-scale plant infrastructure need to complete heavy-duty hoisting operations such as large-scale steel structure beams and columns, prefabricated components, construction machinery, and formwork brackets.The 200t ultra-heavy bridge crane can be adapted to the operation needs of temporary construction sites, prefabricated component workshops, and large-scale infrastructure construction sites. It covers the construction area with a long span and efficiently completes the transfer, installation, and stacking of heavy components.The bridge crane can be customized according to the non-standard parameters of the infrastructure site and adapted to the working conditions of the complex site, greatly improving the construction efficiency of large-scale infrastructure projects, shortening the project construction cycle and reducing construction costs.

200t Overhead Crane Customization Options

Crane configuration

Support the modular and non-standard customization of the whole machine, and the core configurations such as single and double hook configuration, working level, operating mode, and protection level can be selected according to the operating conditions.Users can choose A6/A7 heavy-duty working condition level, ordinary/metallurgical special/shipbuilding special models as needed, with different power drive systems, suitable for conventional, high temperature, dust, corrosion, outdoor and other working conditions.At the same time, the cart track model and walking mechanism form can be customized to meet the needs of different ground foundations and operating spans.

Spreader beam customization

The distribution beam supports full-dimensional customization, including beam length, cross-section specifications, number of hanging points, hanging point spacing, load-bearing grade, material technology, etc.Symmetrical/asymmetric hanging point layout and fixed/adjustable hanging point structure can be customized according to the weight, size, shape, and accuracy requirements of the hoisting workpiece, and exclusive beam solutions can be created for ultra-long, ultra-wide, special-shaped, and precision heavy-duty workpieces to maximize hoisting stability and workpiece safety.

Control system

Provide customized options for multiple types of control systems, including three control modes of cab operation, wireless remote control, and ground operation linkage, which can be used alone or in combination.The standard intelligent frequency conversion control system supports stepless speed regulation, smooth start and stop, and precise alignment.High-end models can be upgraded with intelligent PLC automatic control system, equipped with remote monitoring, data traceability, fault self-diagnosis, and intelligent early warning functions, to realize intelligent, unmanned and efficient operation of bridge cranes, and adapt to the needs of modern heavy industry intelligent factories.

Site-specific design

Provide exclusive site-specific customized designs for the site restrictions, operating processes, and working conditions of different projects.The parameters and structural layout of the bridge crane can be optimized according to the floor height of the plant, the track foundation, the span of the workshop, and the blind area of the operation.For special environments such as high temperature, low temperature, high corrosion, and high dust, anti-corrosion, high temperature resistance, dust-proof, and explosion-proof enhancement programs are customized.Combined with the project construction process, optimize the operating trajectory and operating radius of the bridge crane to maximize the utilization rate of site space and fully meet the personalized construction needs of the project.

How to Choose a 200t Overhead Crane Manufacturer

Heavy-load experience

Henan Mine Crane manufactured 200t super heavy-duty bridge crane belongs to a high-end heavy-duty special bridge crane, and the manufacturing threshold is extremely high. The manufacturer’s heavy-duty project experience is the core guarantee of the quality of the bridge crane.When selecting models, priority should be given to professional manufacturers with more than ten years of experience in R&D and manufacturing of 100-ton heavy-duty cranes, and who have served super projects such as shipbuilding, metallurgy, electric power, and large-scale infrastructure.Mature manufacturers have a wealth of experience in landing projects under complex working conditions, which can accurately match various non-standard customization requirements, avoid loopholes in working conditions adaptation, and ensure the long-term stable operation of bridge cranes.

Engineering capabilities

The core engineering R&D capabilities determine the safety and adaptability of bridge cranes.High-quality manufacturers need to have independent structural design, mechanical verification, program customization, and drawing optimization capabilities. They can complete the structural optimization and safety redundancy design of bridge cranes through finite element analysis and working condition simulation, and independently complete the non-standard customization of the whole machine, exclusive beam system research and development, and intelligent system adaptation.At the same time, it can provide full-process services for preliminary working condition survey, program design, and technical docking, and provide exclusive solutions for complex super projects.

Quality and testing

The quality and testing of heavy-duty lifting bridge cranes are the bottom line of safety. Regular manufacturers need to strictly follow the national lifting machinery industry standards, choose high-strength original steel and brand core accessories, and standardize the welding, processing, and assembly processes of the whole machine.At the same time, it has a full set of factory inspection bridge cranes and rigorous testing processes, and can complete full-dimensional testing such as load testing, non-destructive flaw detection, performance verification, and safety linkage testing, and provide complete qualification certificates, inspection reports, and compliance information to ensure that bridge cranes meet the standards, comply with regulations, and are safe and durable.

Installation and service

The installation and commissioning of large 200t bridge cranes, after-sales operation and maintenance directly affect the project construction progress and the service life of bridge cranes.Preferred manufacturers need to provide one-stop services, including pre-survey, program design, manufacturing, on-site installation, commissioning and acceptance, operator training, and after-sales maintenance process services.With a professional installation team and national after-sales outlets, it can quickly respond to bridge crane failure repair, regular maintenance, and parts replacement needs, and provide all-weather technical support for super engineering projects to prevent bridge crane downtime from affecting construction progress.

Henan Mine Crane Factory Custom

The 200t super-heavy bridge crane with a customized distribution beam system is the core just-needed equipment of the modern heavy industry super project. With its large carrying capacity, high-strength structural design, precise and intelligent control, all-round safety protection, and full-scene adaptation capabilities, it completely solves the hoisting problems of large and heavy-duty components, and widely empowers core heavy industries such as shipbuilding, steel, electric power, and infrastructure.For large-scale engineering projects, the choice of Henan Mine Crane manufactured 200t heavy-duty crane with suitable parameters, reliable structure, high degree of customization, and excellent safety performance, combined with professional Henan Mine Crane Factory technology and after-sales guarantee, can greatly improve construction efficiency, reduce safety risks, save long-term operation and maintenance costs, and build a solid equipment foundation for the high-quality landing of super projects.

The 20-ton bridge crane is the core heavy asset equipment of the factory, warehousing, and heavy industry.When overseas buyers connect with Chinese OEMs, they generally face quotation chaos: the quotation of the same equipment varies greatly, and the low price is often accompanied by the shrinking of the configuration, and the high price is prone to budget waste.

This article will comprehensively disassemble the pricing logic of the 20-ton bridge crane, the full-dimensional cost composition, the cost performance of single and double-beam models, and the Chinese OEM procurement rules, with RFQ inquiry, price comparison, and hidden cost control lists that can be directly applied, to provide professional and landing budget procurement reference for overseas procurement.

What Is the Typical Price of a 20-Ton Overhead Crane

20 tons is a common tonnage for large and medium-sized bridge cranes. Single-beam and double-beam models can be adapted, but minor differences in parameters and configuration will directly affect the price of the whole machine. The core influencing factors are divided into six categories.：

• Rated lifting weight: 20 tons is a fixed rated load and the basic threshold for pricing. Compared with 10-ton and 16-ton models, the material and process standards of steel structures, hoist mechanisms, and load-bearing components are more demanding, and the basic cost is higher.
• Span and lifting height: The longer the crane span (track center distance), the higher the amount of steel used for the main beam and the cost of structural reinforcement process; the greater the lifting height, it is necessary to match longer wire ropes, larger reels, and high-power motors, and the overall equipment cost will rise simultaneously.
• Single-beam/double-beam structure: The 20-ton single-beam bridge crane has a simple structure and light weight, which is suitable for light and moderate operations; the double-beam model has stronger rigidity and higher carrying stability, and is suitable for high-frequency and heavy-duty working conditions. The manufacturing cost is 40%-50% higher than that of a single beam.
• Working level and operating frequency: The working level (ISO/FEM/CMAA standard) directly defines the operating intensity of the equipment, and the low-frequency and light-load operating conditions are adapted to ordinary configurations. High-frequency continuous operation requires upgrading the motor, gearbox, and braking system, which greatly increases the cost of the equipment.
• Hoist/trolley configuration: The cost of ordinary electric hoists is lower, and the frequency conversion trolley, two-speed lifting trolley, and intelligent lifting trolley have higher accuracy and better stability. It is the core price increase configuration of high-end 20-ton cranes.
• Control and electrical system: basic handle control, ordinary electronic control, cost-effective, wireless remote control, cab control, PLC automatic frequency conversion control system, can optimize the operation experience and safety, but will increase the cost of electrical supporting.

20-Ton Overhead Crane Cost Breakdown

The total cost of purchasing a 20-ton bridge crane is not only the bare metal price of the equipment, but the whole chain costs from production, packaging, logistics to installation and after-sales need to be included in the budget.The following is a standardized cost checklist, covering all expense categories：

1. The main steel structure of the crane: verify the rationality of the design of the main beam structure, the national standard original steel material, the precision welding process and the quality of the anti-corrosion and anti-rust coating of the whole machine, and strictly verify the dimensional accuracy of the equipment to ensure that it fully complies with industry safety and compliance standards.
2. Crane/operating trolley: Verify the brand qualification of the supporting motor, gearbox specifications, reel process parameters and hook assembly quality to ensure the lifting accuracy, stability and adaptation performance of the equipment with a rated load of 20 tons.
3. End beam walking mechanism: check the wear-resistant walking wheels, standard drive motors, and intelligent brake protection system to ensure that the crane walks smoothly, accurately positioned, and runs durable throughout the process, and is suitable for high-frequency operating conditions.
4. Electrical control system: equipped with a standardized control cabinet and a frequency conversion drive device, it integrates multiple protection functions of overload, short circuit, and voltage regulation to build a safe, stable, and low-failure electrical operation system.
5. Control system: Supports multiple control modes of handle, wireless remote control, and cab, strictly controls the brand quality and service life of the control components, and adapts to the operation needs of different operating scenarios.
6. Track supporting system: it includes a complete set of supporting components such as walking track, fixing bracket, load-bearing column, and special fasteners. The structure is stable and can ensure the long-term, continuous and stable operation of the crane.
7. Safety protection device: standard with a full set of safety accessories such as stroke limit, overload protection, emergency sound and light alarm, buffer, anti-decoupling, etc., to build an all-round protection system to eliminate safety hazards in lifting operations.
8. Installation and commissioning costs: it covers one-stop landing service costs such as on-site construction labor, installation and commissioning of the whole machine, no-load/rated load testing, equipment commissioning and on-site compliance rectification.
9. Packaging cost: The standard packaging for export fumigation is adopted, with multiple protection processes of anti-corrosion, moisture-proof and shock-proof, which is fully adapted to the international ocean-going transportation environment to avoid equipment transportation losses.
10. Logistics and transportation expenses: it includes the whole chain of logistics supporting expenses such as inland transshipment, international shipping, port loading and unloading, and cargo escort in the factory area, covering the whole process of cross-border transportation.
11. Taxes and customs clearance fees: it covers all official fees required for cross-border compliance such as import duties, value-added tax, customs clearance fees, and qualification filing fees in the destination country.
12. Spare parts cost: It includes the cost of stocking core wearing parts such as motors, wire ropes, brake pads, control switches, etc., which effectively reduces the risk of failure and downtime in the later operation and maintenance of the equipment.

Single-Girder vs. Double-Girder: Which Is More Cost-Effective at 20 Tons

20 tons is the critical point for the adaptation of single-girder and double-girder bridge cranes. The adaptation scenarios, procurement costs, and use costs of the two models are very different. When purchasing, it is necessary to combine the working conditions and select the models comprehensively. Don’t just look at the initial quotation.

20 ton single-girder bridge crane

The 20-ton single-girder bridge crane adopts a lightweight integrated structure design, with mature technology and streamlined structure. It has high adaptability and cost performance in small and medium-sized lifting conditions. The core advantages are as follows：

• Lower cost: the structure of the whole machine is streamlined, there are fewer steel consumables, the production process is mature and simplified, and the production cost is effectively compressed.Compared with similar equipment, the procurement threshold is lower, which can significantly reduce the initial equipment input cost of the project, and the cost-effective advantage is significant.
• Convenient installation and construction: the equipment is light in weight, compact and regular in structure, and the installation process is simple and easy to operate, without the need for complex construction equipment and professional qualified personnel.Significantly shorten the on-site construction cycle, effectively save labor costs and project landing time, and quickly put into operation.
• Strong site adaptability: the equipment covers a small area and the overall volume is compact, and the adaptation requirements for the height of the plant, the load-bearing on the ground, and the installation space are lower.There is no need to carry out structural transformation of the walls, floors, and floor heights of the original factory buildings, and it is suitable for all kinds of new and old small and medium-sized factories and storage sites, with a wider range of applications.
• Applicable site scenarios: Mainly adapted to indoor standardized operating environments, covering conventional industrial plants, small and medium-sized production workshops, warehousing and logistics warehouses, material turnover warehouse areas and other sites.The equipment occupies a small area and has a low threshold for site adaptation. There is no need to transform the building structure, and it can be quickly put into use.

Suitable for application scenarios: This model is designed for light and moderate lifting conditions. It is mainly suitable for indoor conventional factories, ordinary production workshops, warehousing and logistics scenarios. It is suitable for environments with a span of less than 30 meters, an average daily operating time of less than 6 hours, low operating frequency, and no continuous high-intensity heavy-duty operation requirements.

20 ton double girder bridge crane

The 20-ton double-girder bridge crane adopts a symmetrical load-bearing structure with double main beams. The overall structure has high rigidity, strong deformation resistance, and excellent load-bearing stability. The overall performance far exceeds that of single-girder models of the same tonnage. It can be adapted to complex, high-strength, and long-term heavy-duty operating conditions. The core advantages are as follows：

• Stronger structural stability: the symmetrical force structure of the double main beam is adopted, the rigidity of the whole machine is sufficient, the deformation is minimal, and the operation is stable and there is no significant shaking during heavy-duty takeoff and landing and vertical and horizontal movement.Effectively improve the accuracy of operations and ensure the long-term safe and stable operation of equipment from the structural level.
• A wider range of working conditions: it supports long-span and high-lifting operation scenarios, and can stably undertake full-load, high-frequency, and continuous industrial operations under a rated load of 20 tons. The working level of the whole machine is high, and it can be adapted to high-intensity and normalized production conditions.
• Excellent functional expandability: the fuselage reserves sufficient space for modification and upgrade, supports personalized function selection and customization, and can be equipped with anti-swing system, intelligent weighing module, PLC automation control system, dual hoist linkage device and explosion-proof and anti-corrosion protection configuration on demand, suitable for diversified intelligence and special working conditions.
• The service life of the whole machine is longer: the core load-bearing components are evenly stressed and the load is dispersed, which effectively reduces the fatigue loss of long-term operations.The equipment has superior wear resistance, impact resistance and deformation resistance, and low failure rate for long-term heavy-duty operation, which can greatly reduce late operation and maintenance costs and downtime losses.

Suitable for application scenarios: This model focuses on high-strength, high-frequency, high-stability heavy-duty operations, and is widely adapted to various harsh industrial scenarios, including heavy industry manufacturing workshops, metallurgical processing, large-scale mold hoisting, steel structure production, and large-span factories.

Outdoor open-air work sites, as well as special working conditions such as explosion-proof, anti-corrosion, high temperature, and high humidity, are suitable for production lines that operate continuously for a long time and lift at high frequencies.

Selection principle

Procurement and selection must not be based on the lowest quotation as the only criterion. Although the initial investment of low-cost single-girder cranes is small, they are prone to structural deformation, rapid component wear, frequent failures and other problems under high-frequency operations, and later maintenance costs and downtime losses are extremely high.

To compare the cost performance, it is necessary to comprehensively consider the service life of the equipment, the average annual maintenance cost, energy consumption, downtime and failure rate, and operating efficiency.In long-term heavy-duty operation scenarios, the whole life cycle cost of double-girder cranes is lower; in light-load and low-frequency scenarios, single-girder cranes are the most cost-effective.

China OEM Sourcing: What Does the Quotation Usually Include

Regular Chinese bridge crane OEM source manufacturers, standardized quotations are one-stop supporting solutions for the whole machine, which are different from the fragmented quotations of trading companies. The complete quotations contain the following content, which is also the core standard for procurement to verify the completeness of quotations.：

• Customized design and load calculation for exclusive working conditions: according to the site span, lifting height, operating frequency, environment and power supply conditions, a one-to-one customized engineering plan, optimize equipment drawings and operating parameters, and improve safety redundancy through professional load verification to ensure that the equipment is accurately adapted to on-site working conditions.
• Precision machining and anticorrosive treatment of steel structures: core structures such as main beams and end beams are processed from original national standard steel, relying on precision welding and CNC cutting technology to ensure the accuracy of the whole machine; with multiple rust removal and anticorrosive coatings, it effectively resists oxidation and corrosion, and is suitable for complex working conditions and cross-border shipping.
• A full set of core lifting and walking accessories: equipped with 20 tons of special electric hoist, frequency conversion trolley, trolley walking mechanism and other core components, the accessories parameters are adapted and compatible, and the whole machine is debugged and optimized to ensure stable lifting, accurate walking, and smooth start and stop.
• Electrical control and safety protection system: equipped with a standardized frequency conversion electronic control and voltage regulation protection system, which supports dual-mode control of handle and remote control; equipped with multiple safety devices such as limit, overload, alarm, and anti-decoupling to build a perfect protection system to ensure the safe operation of equipment with low failure.
• Certified transmission and braking power components: equipped with national standard and internationally certified special lifting motors, transmission and braking assemblies, stable power, efficient transmission, sensitive braking, wear-resistant and fatigue-resistant, can be adapted to conventional and high-frequency heavy-duty operations, greatly reducing the equipment failure rate.
• Full-dimensional factory quality inspection and acceptance: After the equipment is assembled, complete the full working condition test of no-load, full load, and overload, and conduct all-round testing of the structure, transmission, electrical, and safety systems of the whole machine, and issue a formal quality inspection report to ensure that the equipment complies with the standards and has reliable performance.
• Export standard protective packaging: special packaging for international shipping, with fumigation wooden frame, waterproof, shockproof, anti-rust multiple protection processes, all-round protective equipment, to prevent moisture, corrosion, bump damage and other problems in ocean-going transportation.
• A full set of qualifications and customs clearance information: supporting drawings, instructions, quality inspection reports, certificates of conformity, international certifications and other complete technical qualification documents, equipped with standardized export customs clearance information, to meet overseas customs clearance, equipment acceptance and post-maintenance needs.
• Core procurement recommendations: All manufacturers’ quotations must require itemized detailed quotations, and refuse to accept total price quotations.The detailed quotation can clearly check each configuration, brand, and specification, effectively avoiding the problem of configuration shrinkage and invisible allocation reduction.

10 Key Specifications That Can Change Your 20-Ton Crane Price

With the same 20-ton bridge crane, fine-tuning the parameters can bring about price fluctuations of tens of thousands of yuan. The following 10 core parameters are the focus of budget control and the core source of differences in manufacturers’ quotations.：

• Span: Span is the first element that affects the cost of steel structures. For every 1 meter increase in span, the amount of steel used for the main beam and the cost of structural reinforcement will increase simultaneously. At the same time, the supporting cost of the track system will be increased. The production process of large-span models is difficult, and the quality inspection standards are higher, and the quotation has risen significantly.
• Lifting height: The higher the lifting height, the longer the length of the wire rope and reel required, and the higher the motor power and lifting torque requirements. At the same time, the frequency conversion control system needs to be upgraded to ensure the stability of lifting, and the structural design adapted to aerial work will also increase production costs.
• Total length of track: The track system is an independent charging project and does not belong to the bare metal configuration of the crane.The longer the total length of the track, the higher the cost of track, brackets, fixed accessories, and civil construction supporting, which is the most easily missed budget item for overseas procurement.
• Work level: The work level corresponds to the operating intensity of the equipment. High-frequency and heavy-duty working conditions require upgrading of high-strength motors, thickened steel structures, and wear-resistant brake components. The material and process costs are greatly increased. Low-level equipment cannot be adapted to high-intensity operations, and forced use can easily cause safety accidents.
• Lifting speed: Ordinary single-speed lifting has the lowest cost, and two-speed lifting takes into account the needs of fast and slow operations. Frequency conversion and speed regulation can achieve accurate and stable lifting and eliminate impact and shaking. The cost of electronic control and motors with different speed configurations increases step by step.
• Operating speed: The faster the operation speed of large vehicles and small cars, the higher the requirements for motor power, braking system, and electronic control stability. High-speed models can improve operating efficiency, but they will increase equipment manufacturing costs and energy consumption costs.
• Power supply parameters: domestic 380V/50Hz three-phase electricity is the standard configuration, and there is no need to increase the price; if the on-site voltage, frequency, and phase number are special, the electrical system and frequency conversion device need to be customized to adapt, resulting in customized transformation costs.
• Operating environment: The conventional indoor dry environment is the basic configuration, and the outdoor open air, high temperature, low temperature, dust, humidity, corrosion, flammable and explosive special environments need to be installed with special anti-corrosion, explosion-proof, temperature control, and dust-proof configurations to greatly increase the cost of equipment.
• Control method: handle control is the most cost-effective, wireless remote control improves operation safety and flexibility, cab control is suitable for large and heavy-duty equipment, PLC automatic control can achieve unmanned operation, the higher the configuration level, the higher the price.
• Special customization requirements: explosion-proof configuration, electromagnetic lifting, grab adaptation, double hoist linkage, anti-swing system, intelligent weighing system, automated operation and other customized functions are all independent price-increasing items, which can be selectively installed according to job requirements.

Core reminder: Do not judge the merits of the quotation based on the single price alone.Local low-cost quotations often delete core safety configurations and reduce supporting services, while Chinese OEMs’ one-stop complete quotations, although they need to bear logistics tariffs, are fully configured and highly standardized, which can effectively reduce the hidden costs of late integration, rectification, and maintenance.

Hidden Costs to Include in Your China Crane Sourcing Budget

Most procurement budget overspending stems from ignoring various hidden expenses.The complete Chinese OEM procurement budget must include the following hidden costs of the whole chain of pre-production, logistics, installation, and after-sales：

Before shipment

It mainly includes pre-compliance costs such as customized transformation of working conditions, third-party authoritative quality inspection, factory acceptance testing (FAT), export qualification review, and a full set of customs declaration documents.This part of the cost is used to ensure that the equipment is produced in accordance with local working conditions and meets export specifications, to ensure production compliance, smooth customs declaration, and smooth delivery.

Logistics clearance

It includes freight insurance, ocean shipping, port loading and unloading, warehousing and escrow, destination country import tariffs, professional customs clearance service fees, and landing short-distance transshipment and other full-link expenses, fully covering cross-border logistics and customs clearance compliance costs, which is an indispensable core sector in overseas procurement budgets.

On-site landing

It covers one-stop landing expenses such as on-site assembly and commissioning of equipment, supporting construction of rail civil construction, docking and integration of on-site electrical systems, and professional skills training of operators, and fully guarantees the compliance installation and one-time commissioning of equipment to meet the standards, so as to achieve stable landing and commissioning, long-term stable and compliance operation.

Long-term after-sales

Including long-term operating costs such as stocking procurement of core vulnerable parts, on-site technical services during the warranty period, annual equipment overhaul and maintenance, and daily operation and maintenance consumables procurement, it can effectively avoid additional hidden expenses such as sudden equipment downtime and temporary maintenance premiums, and ensure long-term stable and low-cost operation of equipment.

How to Compare Quotes From Chinese Overhead Crane Manufacturers

When purchasing 20-ton bridge cranes overseas, identifying the source manufacturers of regular OEMs and avoiding middleman premiums and procurement risks are the key to controlling the quality and budget of equipment.Before formally placing an order, buyers must verify the following 10 core issues with the manufacturer to ensure the rights and interests of procurement and the quality of equipment delivery in all directions.：

1. Is your company a self-owned production plant or a trade intermediary?Does it support customers to inspect the factory on site or online video to verify the production workshop?
2. What are the specific cooperative brands of motors, electrical components, and mechanical core accessories included in this quotation?Can you provide brand qualification certificate?
3. What industry operating standards (ISO/FEM /CMAA) does the equipment follow?Please clarify the specific working level of the equipment.
4. Does it support equipment customization and adaptation according to the purchaser’s local power supply parameters and special operating environment?
5. What international general certifications can the equipment provide?Can a complete set of certification documents and compliance information be provided with the goods?
6. What is the specific content of the equipment warranty period and the official warranty coverage?Clarify the scenarios and terms that are not part of the warranty payment.
7. What standardized testing items will be performed before the equipment leaves the factory?Can you provide the official load test report and factory quality inspection certificate?
8. Does it provide free remote installation guidance, equipment debugging and operation teaching services?Does the large order support the on-site landing service of engineers?
9. What is the supply method of vulnerable parts and spare parts in the later stage of the equipment?How long is the production cycle and delivery time of conventional accessories?
10. Please clarify the equipment standard production and delivery cycle, export packaging implementation standards, and the complete process of logistics docking and customs declaration and shipment.

Conclusion

The price of a 20-ton bridge crane depends on the span, lifting height, working level, configuration, installation and transportation costs. You can’t just look at the bare metal quotation.When choosing a Chinese OEM manufacturer, more attention should be paid to customization capabilities, product quality and life cycle costs.

Henan Mine Crane can provide customized solutions and quotations for 20-ton bridge cranes according to actual working conditions.Purchasing a 20-ton bridge crane?Welcome to contact us for professional selection suggestions.

The 16-ton double-girder bridge crane is mostly used in the heavy industry. There are generally space constraints in old factories. The lifting height of traditional models is insufficient and the adaptability is poor, and the cost of plant transformation is high.

The low-clearance double-girder crane has been optimized in structure, with a compact fuselage and a larger lifting height. There is no need to transform the plant, and the space utilization rate and operating stability are better.This article comprehensively introduces the performance parameters, adaptation scenarios and operation and maintenance selection points of the equipment, and provides a basis for equipment procurement.

What Is a 16t Double Girder Overhead Crane

The 16-ton double-girder bridge crane is a cross-frame material handling equipment. The core relies on two parallel main beams to span the tracks on both sides of the workshop, and cooperates with multi-system linkage to achieve three-dimensional space lifting operations.The whole machine has a precise structure and a clear division of labor, and the four core subsystems constitute a complete operating system.：

• Double main beams (2 pieces): The core load-bearing body of the equipment, which spans the span of the workshop, undertakes all vertical loads and dynamic operating loads to ensure the structural stiffness, smooth operation and positioning accuracy of the whole machine.；
• End beam: symmetrically connect the ends of the two main beams, integrate the walking wheels of the cart, and be responsible for the longitudinal walking of the whole machine. At the same time, the equipment and lifting load are evenly distributed to optimize the overall force.；
• Cart operating mechanism: it is composed of a motor, a reducer, and a walking wheel, which provides stable power for the longitudinal movement of the whole machine along the track of the plant.；
• Hoist and trolley mechanism: equipped with a hook pulley block, it can walk laterally along the main beam track, and cooperate with the vertical lifting action of the hoist to complete the precise lifting, alignment and handling of materials.

How it works

The crane as a whole is erected on the operating tracks on both sides of the plant through the end beam wheels, and the trolley operating mechanism drives the whole machine to move vertically and long distances along the track; at the same time, the hoist trolley relies on the dedicated track on the top of the main beam to realize horizontal walking.

Combined with the vertical lifting function of the hoist, the three motion dimensions cooperate with each other, which can cover the entire workshop operation area under the track, realize no dead ends, material handling, positioning, assembly and other operations, and adapt to various medium and heavy industrial hoisting scenarios.

Why Choose Double Girder for 16t Capacity

16 tons is a medium- and heavy-duty lifting load. Single-girder cranes are limited by structural stiffness and load distribution, and cannot be adapted to long-term, high-frequency, and long-span operation needs. The structural advantages of double-girder cranes are fully highlighted under this tonnage. It is also the mainstream selection scheme for industrial scenarios.

Higher structural stiffness

The parallel force structure of the double main beam greatly improves the overall bending stiffness of the crane bridge, and the span deflection under full load can strictly comply with FEM, ISO, GB/T and other industry standards, effectively suppressing the shaking and vibration during equipment operation, start and stop.

For a rated load of 16 tons, the high-stiffness structure can ensure accurate hoisting and positioning, avoid safety risks caused by load offset and equipment jitter, and adapt to precision assembly and heavy material displacement scenarios.

More reasonable load distribution

Compared with only 2 load-bearing wheels at both ends of the single-girder crane, the 16-ton double-girder crane is equipped with a total of 8 load-bearing wheels at both ends, which can evenly distribute the load and hoisting load of the whole machine to the operating track and the plant column.

The single-wheel load is greatly reduced, which not only reduces the force and pressure of the track beam, but also reduces the carrying load of the foundation and column of the plant, adapts to long-term heavy-duty operations, and extends the service life of equipment and plant infrastructure.

Long-span and high-load adaptability

The upper limit of the economic span of conventional single-girder cranes is 20-22 meters, and after the tonnage exceeds 12 tons, the weight surges and the cost performance drops significantly.The 16-ton double-girder crane can be adapted to a workshop span of 18-28 meters. While ensuring structural stability, there is no need to increase the weight of the fuselage excessively, and it is perfectly adapted to the high-frequency and continuous heavy-duty operations of large and medium-sized production workshops.

Lifting height advantage

This is the core advantage of double-girder cranes for low-clearance workshops.The single-girder crane hoist is suspended under the main beam, taking up a lot of vertical space; the double-girder crane can arrange the hoist trolley between the two main beams or on top of the main beam. Through the compact structure design, the vertical space occupied by the whole machine is greatly reduced, and the limited headroom of the plant is maximized. , Improve the effective lifting height.

Typical Applications of 16t Double Girder Overhead Crane

With a moderate load capacity of 16 tons, stable operating performance and flexible space adaptability, the equipment is widely used in various heavy industry production, processing, and maintenance scenarios.：

Machinery manufacturing workshop

It is suitable for loading and unloading, cross-station transfer and precision assembly alignment of large-scale castings, welded components and machine equipment. It can be stably adapted to the normalization and high-frequency hoisting of medium and heavy workpieces, and perfectly matches the modern production conditions of large-scale and high-precision.

Steel structure processing plant

It can efficiently undertake the transportation and hoisting of shaped steel, thick steel plates, and large-scale welded welded parts, covering all processes from cutting, welding, finishing to finished product outbound, and is perfectly adapted to the continuous, high-load, and large-scale mass production rhythm of steel structure factories.

Automobile production workshop

It is highly adapted to the precision and high-beat production needs of intelligent automotive manufacturing, and can stably complete the hoisting and transportation of stamping molds, body assemblies, power assemblies, and large-scale tooling fixtures, rapid mold replacement, and precise alignment assembly, fully in line with the strict operating standards of high precision, high frequency, and continuity in the automotive industry.

Foundry and heavy industry workshop

It is perfectly adapted to the harsh operating environment of high temperature, dust, and high load in the foundry workshop, and can stably complete the efficient transfer and alignment of molds, castings, and heavy-duty accessories. After being equipped with special protection and supporting devices, it can safely undertake the special hoisting process of high-temperature special materials such as steel ladles, and the adaptability of working conditions and operating safety are extremely strong.

Equipment repair and assembly workshop

It is suitable for the maintenance and assembly scenarios of heavy equipment such as large motors, gearboxes, industrial units, etc., and can accurately complete the disassembly, displacement, alignment and assembly of heavy components, effectively improve the operation accuracy and maintenance efficiency of large-scale equipment maintenance, and ensure the efficient landing of equipment operation and maintenance processes.

Key Design Parameters for a 16t Low-Clearance Overhead Crane

Accurate parameter selection is the key to adapting the equipment to the working conditions of the workshop. The following are the standardized design parameters and selection basis of the 16-ton low-clearance double-girder crane, which can be directly used as a reference for procurement and customization.：

• Rated load: The standard rated lifting weight is 16 tons, including the weight of the hook and spreader; safety load redundancy can be customized according to heavy-duty, eccentric, and high-frequency impact conditions, which complies with FEM, ISO and national standard safety specifications to ensure the stability and safety of heavy-duty operations.；
• Span: It can be precisely customized according to the spacing of the workshop columns and track parameters, and is suitable for the mainstream span of 18-28 meters.Through the optimization of the main beam structure, the deflection is effectively controlled to ensure smooth operation and accurate positioning over a long span.；
• Lifting height: combine the net height of the plant, the elevation of the track and the obstacles on the top to customize the maximum lifting stroke, fully tap the vertical space, and match the actual production hoisting needs without retrofitting the plant.；
• Work level: conventional processing and assembly workshops are adapted to A5–A6 levels; casting, heavy industry and other high-load continuous working conditions can be upgraded to A7 levels to strengthen the fatigue resistance and wear resistance of the whole machine, and adapt to long-term high-frequency operations.；
• Hoist type: standard low-clearance compact wire rope hoist, with integrated structure and high-strength rope configuration, stable start and stop, wear-resistant and fatigue-resistant, designed for low-rise workshop space-restricted working conditions；
• Trolley layout: The compact layout embedded on the inside of the double beam is adopted, and the core components of the hoist are integrated in the gap of the main beam, eliminating the traditional external stacking structure, greatly reducing the size of the vertical envelope, and effectively increasing the effective lifting height.；
• Operating speed: equipped with a frequency conversion speed control system, the cart is 20–80m/min, the trolley is 10–40m/min, and the lifting is 1–8m/min to achieve stepless and smooth start and stop, reduce load shaking, and take into account the transfer efficiency and alignment accuracy.；
• Power supply method: adapt to industry standard voltage, support two power supply modes of sliding contact line and cable pulley, and can be flexibly selected according to workshop layout and operation frequency, stable operation and convenient maintenance；
• Control mode: Support three modes of handle, wireless remote control, and cab control. It can be used alone or in combination to adapt to close-range precision positioning, flexible remote control, and heavy-duty operation scenarios in large workshops.；
• Safety configuration: A full set of safety interlocking systems such as overload protection, two-way limit, emergency stop, travel limit, anti-collision device and failure protection brake are standard. Multiple protections effectively avoid risks such as overload, offside, collision, and falling objects, and ensure the safe operation of equipment and human-machine.

16t Double Girder vs. Single Girder for Low-Clearance Workshops

Under the conditions of 16-ton tonnage and low headroom, the overall performance of double-girder cranes far exceeds that of single-girder cranes, and the structure, space utilization, and cost performance of the two are significantly different.

Core structure differences

The single-girder crane is a single main beam load-bearing, and the hoist is suspended at the bottom of the main beam. The load is concentrated and the structural deflection is large; the double-girder crane relies on the symmetrical load-bearing of the double main beam, and the trolley walks above or inside the main beam.

The load is evenly dispersed and the structural stiffness is stronger.At the same time, the size of the main beam of the single-girder crane is greatly thickened under the working conditions of 16 tons, and its own weight is bloated, while the size of the double-girder structure is more reasonable and the operation is more stable.

Comparison of headroom adaptation capabilities

The “single beam is more space-saving” generally recognized by the industry is only applicable to light-load conditions below 10 tons.Under 16-ton working conditions, the thickness of the main beam of the single-girder crane is extremely large, and the hoist sagging takes up a lot of vertical space, and the effective lifting height is extremely low.；

The optimized compact double-girder crane can lift the hook to a higher position. Under the same workshop headroom, the effective lifting height of the double-girder model is far better than that of the single-girder.Therefore, the selection of low headroom needs to be based on the overall operating envelope size of the equipment, rather than simply distinguishing single and double beams.

Cost and performance trade-off

In terms of initial procurement costs, the price of single-girder cranes is lower, but under 16-ton working conditions, the adaptability is poor, the failure rate is high, and the cost of plant transformation is high; the initial investment of compact double-girder cranes is slightly higher.

However, there is no need to retrofit the plant, adapt to high-frequency heavy-duty operations, low operation and maintenance costs, and longer service life.In the long run, the comprehensive price ratio, stability and adaptability of 16-ton double-girder cranes under low headroom conditions are comprehensively ahead of single-girder models.

How to Design the Crane Around Existing Workshop Dimensions

Low-clearance cranes cannot be applied to standard models, and need to be customized in combination with the actual size of the workshop. The standardized five-step process can be accurately adapted to on-site working conditions.：

1. Accurately survey the headroom size of the workshop and accurately measure the minimum obstacle height of the roof, the raised size of the beams and columns, the bottom elevation of the pipeline and the top elevation of the existing track. The minimum headroom boundary of the site is used as the design benchmark to avoid equipment installation interference and space conflicts from the source.；
2. The effective lifting height required for approved production is combined with the maximum lifting height of the workpiece, the safe reserved gap above the material, and the closed size of the hook pulley block to accurately calculate the minimum effective lifting stroke to meet the production process to ensure that the lifting operation is in compliance with the available；
3. Calculate the available installation envelope space of the equipment through the difference between the height of the track elevation and the height of the limit hook, calculate the maximum vertical installation size allowed by the crane and trolley, lock the upper limit of the equipment structure design, and adapt to the restricted headroom on the site；
4. The configuration of the low-headroom compact trolley is preferred to standardize the core parameters of the standard trolley and the low-headroom trolley, and the customized trolley layout with small hook size, small vertical footprint and sufficient maintenance space is preferred to balance the space utilization rate and equipment maintainability.；
5. Verify the structure and electrical conditions of the site, comprehensively verify the carrying capacity of the existing track, the load margin of the plant column and foundation, the power supply parameters of the workshop and the supporting electrical conditions, to ensure that the structure is stable, the electrical matching, and the operation is safe and stable after the installation of the equipment.

Safety Considerations for 16t Overhead CraneCranes

The low-headroom workshop has compact working space and small equipment operating margin, which is prone to safety hazards such as insufficient limits and structural collisions, which puts forward higher requirements for the safety and protection performance of lifting equipment.Therefore, the 16-ton low-clearance double-girder crane must be equipped with a full set of customized safety protection system to avoid the risks of narrow space operations in all directions and ensure the safety of man-machine and the stable operation of equipment.：

Overload protection device

The equipment is equipped with a high-precision overload protection system. When the load reaches 110% of the rated 16 tons, the sound and light alarm is automatically triggered and the lifting power is cut off to prevent overload operations, effectively protect the crane’s main beam, walking track and plant infrastructure structure, and avoid structural deformation and equipment damage caused by overload.；

Two-way multiple limit system

It is equipped with multiple protective devices for the upper and lower lifting limits of the hooks, the vertical and horizontal walking limits of the carts and trolleys, and the operating boundaries of the equipment are accurately restricted.It can effectively eliminate high-risk problems such as hook rushing to the top, touching the structure of the trolley, and equipment offside collision and stroke overrun under low headroom conditions.；

Global emergency stop system

Configure the emergency stop button in multiple positions of the operation handle, wireless remote control, and cab, covering all operation scenarios.In case of emergency situations such as sudden failure, space interference, and personnel intrusion, the power of the whole machine can be cut off with one key, and the machine can be stopped instantly to avoid danger, and dangerous operations can be terminated quickly.；

Intelligent anti-collision protection device

For multi-machine operation on the same track and narrow workshop conditions, it is equipped with an infrared intelligent anti-collision system to monitor the spacing of equipment in real time.When the distance between the two cranes is less than the safety threshold, it will automatically slow down, give early warning, and stop, completely avoiding equipment collision accidents.；

Failed self-locking brake system

All series are equipped with power-off self-locking safety brakes, which have automatic locking functions for failure, power failure, and voltage loss.In the event of a sudden power failure or system failure, the lifting and walking mechanisms can be locked instantly to prevent major safety hazards such as heavy objects falling and equipment slipping.；

Strict factory load testing

The equipment strictly implements the national standard load test before leaving the factory, completes the 125% rated static load test pressure and 110% rated dynamic load test operation, and comprehensively verifies the structural strength, braking performance and stability of the whole machine to ensure safety and reliability under full load and fluctuating operating conditions.；

Visual safety operation mechanism

The wireless remote control is equipped with a professional living person protection function, which strictly limits the visual range of operations, eliminates blind spot hoisting and long-distance illegal operations, avoids safety risks such as material collisions and accidental injuries to personnel from the operating level, and adapts to a complex operating environment with low headroom.

Dedicated debugging precautions

The upper travel margin of the hook of the low-clearance crane is very small and the structural gap is compact. The upper limit position parameters must be accurately calibrated during the installation and commissioning of the equipment, and the limit lifting position of the hook must be strictly controlled to prevent hard collisions between the hook, pulley block, trolley and main beam, and ensure the long-term safe operation of the equipment.

Conclusion

With its high structural stiffness, reasonable load distribution and high space utilization rate, the 16-ton double-girder bridge crane is suitable for medium and heavy lifting in low-clearance workshops.Through compact trolleys, optimized lifting size and customized structural design, the effective lifting height can be increased while reducing the renovation of the plant.

When selecting the type, the headroom, operating envelope, lifting height, structural safety and maintenance requirements of the plant should be considered comprehensively, rather than just looking at the tonnage.Henan Mine Crane can provide customized solutions for low-clearance double-girder bridge cranes according to workshop structure and hoisting conditions to help customers achieve safe and efficient space optimization hoisting.

The space of the underground mine workshop is small, the dust is large, and the load fluctuates violently, and the requirements for bridge cranes are much higher than that of ordinary workshops.The 150-ton mine maintenance bridge crane is dedicated to the disassembly, assembly and overhaul of the core components of large-scale mining equipment such as mining dump trucks, loaders, excavators, electric shovels, etc.

The key to its adaptation to underground working conditions lies in the protective design of peak lifting capacity, compact structure, heavy-duty reliability and dust-proof gearboxes.This paper analyzes the core technology and application value of the crane from the misunderstandings of equipment design, working condition adaptation, selection, operation and maintenance selection.

What Makes a 150t Mining Maintenance Overhead Crane Suitable for Underground Workshops?

Large lifting capacity

The 150t rated load can complete the disassembly, assembly and hoisting of heavy-duty assemblies such as large equipment engines and buckets such as mining dump trucks and excavators. The weight of rigging, hoisting beams, etc. needs to be included in the hoisting.Before operation, the load needs to be reviewed, the spreader is optional, and the 5–20t auxiliary hoist is used to handle small pieces.The selection should be based on the maximum peak load of maintenance, not the average load, and a safety margin should be reserved to avoid heavy-duty overhaul from being unable to be constructed.

Adapt to underground space

Underground clearance, roadways, and tracks are limited. The crane adopts a low clearance design and relies on a compact trolley and a double-beam structure to lift the available height of the hook.The limit distance of the main beam, end beam, and hook affects the operation of the station.The whole machine is modular and split design, and the parts are easy to transport downhole and assemble on site; the installation is adapted to the downhole anchoring conditions, and the alignment and load tests are completed.

Harsh mining conditions

The crane is equipped with fatigue-resistant main beam, heavy-duty lifting mechanism, redundant braking and dust-proof and moisture-proof electrical, which meets the FEM/ISO M5-M7 heavy-duty level.Frequency conversion micro-speed control realizes smooth lifting and precise positioning of the load, and is suitable for continuous overhaul of multiple shifts.Dust protection is the focus of the reliable operation of the whole machine, and the dust-proof sealed gearbox is the core component of longevity and failure reduction.

Why Dust-Sealed Gearboxes Matter in Underground Mining Environments

• The harm of dust to the gearbox: underground hard dust invades the gearbox, contaminates the lubricating oil, wears out the gear bearings, causes overheating, early damage to components, and causes maintenance shutdowns and mine production losses.
• The principle of dust-proof gearbox protection: A fully sealed box, multi-stage sealing and filtration and ventilation device are used to suppress the “breathing effect” of dust.Dustproof does not mean that it is waterproof or completely isolated from dust. The protection effect is determined by the IP rating, design and operation and maintenance.
• Gearbox material, lubrication and heat dissipation: quenched alloy gears are equipped with heavy-duty lubricating oil, and the oil change cycle is set as needed; the heat dissipation structure controls the temperature rise, and the oil and temperature monitoring are used to check for faults in advance.

Key Design Features of a 150t Mining Maintenance Overhead Crane

Main lifting mechanism

• The core transmission unit is composed of a high-torque heavy-duty motor, a dust-proof sealed gearbox, a wire rope reel, and multiple redundant braking systems. The transmission is stable and reliable.
• Equipped with frequency conversion speed regulation and micro-speed fine-tuning functions, the lifting starts and stops smoothly, which can realize the precise alignment and installation of large and heavy-duty components, and is suitable for underground overhaul scenarios.
• Built-in load limiting device, which can monitor the hoisting load in real time, and trigger protection immediately once the limit is exceeded, ensuring the safety of underground maintenance operations in all directions.

Main beam and operating mechanism

• The whole machine adopts a double main beam structure, with high overall stiffness and excellent deformation resistance. At the same time, sufficient maintenance space is reserved to facilitate later equipment maintenance.
• With customized heavy-duty wheel sets, after rigorous wheel pressure verification and calculation, it is adapted to the carrying conditions of underground track and roadway support.
• The carts and trolleys are all driven by frequency conversion, which can walk smoothly and smoothly, reducing the shaking of the hanging objects; the whole machine is optimized for fatigue resistance and is suitable for long-term continuous operation.

Electrical and control

• Support three operating modes: suspension handle, cab console, and wireless remote control, which can be flexibly switched according to the layout of the underground site and the field of view.
• Integrated travel limit, overload protection, emergency shutdown, and fault self-diagnosis functions to quickly identify abnormal conditions and reduce operating risks.
• All electrical components are sealed and protected with high IP rating, with dust and moisture-proof capabilities, and effectively resist the erosion of underground dust and humid environments.

Security configuration

• The hardware level is equipped with load protection, stroke limit, dual redundant braking, and multi-machine anti-collision devices to avoid the risks of overload, over-stroke, collision, and slip hook from the source.
• Supporting standardized hoisting operation specifications, clarifying the hoisting restricted area, operation process and on-site communication mechanism, and standardizing the operation behavior of on-site personnel.
• The complete safety system is designed in strict accordance with the relevant standards of mine lifting equipment to meet the compliance and safety requirements of underground high-risk operations.

How Dust-Sealed Gearboxes Improve Maintenance Efficiency and Operating Costs

Reduce early gearbox wear

The dust-proof sealing structure restricts dust from invading the interior of the gearbox from the source, continuously guarantees the cleanliness of the lubricating oil, greatly reduces the grinding and wear of gears and bearings, and delays the aging rate of core components.

Under the premise of standardized sealing maintenance and regular oil changes, component damage and equipment failure maintenance caused by dust pollution can be minimized, and the service life of the gearbox and the core transmission components of the whole machine can be significantly extended.

Reduce the risk of unplanned downtime

The sudden failure of the gearbox is the core factor that causes the maintenance and shutdown of downhole equipment. It will directly interrupt the replacement of heavy-duty components and regular maintenance of equipment, resulting in long-term idle and shutdown of mining equipment.

Relying on the stable performance of the dust-proof gearbox, combined with operation and maintenance methods such as condition monitoring, preventive inspections, and planned oil changes, sudden transmission failures can be completely avoided, cranes can be guaranteed to be on call at any time, and mining equipment maintenance work can be stably supported in an orderly manner.

Optimize the full cycle cost of equipment

Dust-proof heavy-duty gearboxes will slightly increase the initial procurement cost of equipment, but they can significantly reduce the frequency of lubricating oil replacement, parts replacement costs, and labor maintenance costs in long-term operations, especially to avoid high production losses.

Equipment selection needs to focus on the whole life cycle cost (TCO), rather than a single purchase price. Long-term stable reliability can help mining companies achieve cost reduction and efficiency, and create higher long-term operating value.

How to Select the Right 150t Mining Maintenance Overhead Crane

Approved load and hoisting requirements

Before selecting the type, it is necessary to accurately count the maximum weight of the downhole maintenance components, the additional weight of the rigging tooling, the required lifting height, crane span, hook coverage, equipment dimensions and operating frequency.

At the same time, the 150-ton load is clearly defined as the main hoist independent load or the multi-hoist combined load. According to the operation needs of light-duty parts, an auxiliary hoist system adapted to the specifications is selected to achieve full coverage of large and small working conditions.

Assess dust and environmental conditions

On-site investigation of underground dust type, dust concentration, environmental humidity, perennial temperature range, water seepage risk and other working condition parameters, targeted matching of gearbox sealing scheme, electrical protection level, and dust-proof configuration of the whole machine.Abandon the general concept of ”dustproof”, and take the specific IP protection level, sealing structure type, and working condition adaptation test data as the basis for selection to ensure that the equipment’s protection ability matches the actual working conditions.

Matching equipment operating condition level

According to the average daily operating time of the equipment, the frequency of hoisting, the proportion of full-load operations, and the number of operating cycles, the crane operating condition level is determined, and the FEM M5-M7 and CMAA D/E heavy-duty operating condition models are preferred.

Manufacturers are required to verify the working condition level of the equipment and the service life of the core components according to the actual operating load spectrum of the mine to ensure that the equipment can be adapted to high-intensity underground maintenance operations for a long time.

Verify the convenience of installation, operation and maintenance

Verify the basic parameters such as the effective headroom height of the underground, the bearing capacity and flatness of the track, the size of the equipment transportation channel, the assembly operation space, and the power supply conditions in advance.Plan in advance the downhole maintenance and replacement plans of core components such as gearboxes, motors, and brakes, confirm the manufacturer’s spare parts supply capabilities and on-site technical support services, and ensure convenient and efficient operation and maintenance of equipment in the later stages.

Installation, Inspection, and Maintenance Best Practices

• Pre-installation engineering verification: verify the track flatness, installation tolerances, support bearing capacity, power supply and construction space before installation, and confirm that the installation standards are met on site.After the installation is completed, check the equipment configuration and parameters, and then debug and put into operation after it is consistent with the requirements of the drawings.
• Normalization inspection specifications of gearboxes: Daily inspections focus on checking gear box seals, oil levels, oil quality, leakage, abnormal noise and temperature rise, and promptly clean up the seals and dust accumulation in the ventilation valves.Implement the inspection cycle and oil change specifications according to the manufacturer’s requirements.
• Preventive operation and maintenance and condition monitoring: establish a maintenance ledger of the whole machine, covering all core components.Vibration, oil, temperature monitoring and other means can be used to identify potential faults in advance and realize predictive maintenance.
• Safety management of maintenance operations: power failure and isolation are implemented during maintenance; the load needs to be supported on the ground for maintenance of heavy-duty components, and floating operations are prohibited.The operators are licensed to take the job, and the operation can only resume after the overhaul is completed and the acceptance is qualified.。

Common Mistakes When Specifying Mining Maintenance Overhead Cranes

• Selection is carried out based on the daily average load, and the peak load of underground maintenance operations is not fully considered, which will cause the crane to have insufficient heavy-duty operation capacity and cannot meet the hoisting needs of the core assembly of large-scale mining equipment.
• One-sided use of the dust-proof seal of the gearbox as a complete environmental protection plan, ignoring the supporting protection systems such as electrical dust-proof, equipment anticorrosion, and vehicle seal, it is difficult to resist the complex and harsh underground environment.
• Ignoring spatial and structural constraints such as underground effective clearance height, hook limit proximity distance, track carrying capacity, equipment transfer and installation conditions, etc., ultimately leads to equipment that cannot be adapted to on-site working conditions.
• Blindly choosing the sealing structure of the gearbox, without combining the comprehensive evaluation of factors such as equipment operating temperature rise, environmental humidity, shaft end speed, and convenience of late maintenance and maintenance, the sealing reliability is greatly reduced.
• The selection does not reasonably match the crane working condition level, and the carrying strength of the equipment cannot be adapted to high-frequency and heavy-duty underground operations, which will accelerate the fatigue loss of the whole machine and cause the equipment to age and fail in advance.
• Equipment acceptance standards, daily inspection specifications, on-site after-sales technical support and spare parts supply services have not been clearly agreed during the procurement phase, and the operation and maintenance guarantee of the equipment after it is put into use is insufficient.

Conclusion

The 150-ton underground mine maintenance bridge crane integrates heavy-duty capacity, compact structure, dust-proof gearbox and multiple safety protections, and is suitable for small underground, high-dust, and high-intensity maintenance environments.Reasonable configuration can meet the needs of large-scale mining equipment hoisting and maintenance, and reduce the risk of downtime caused by equipment failure.

The selection needs to comprehensively evaluate the load, space, dust, and operating intensity, take into account the whole life cycle cost, and cooperate with standardized operation and maintenance to ensure the stability of the equipment.Henan Mine Crane can customize a 150-ton underground bridge crane, supporting heavy-duty, dust-proof and safety solutions, and serving the maintenance of mining equipment.

Fire, nuclear, hydroelectric and steam turbine plants have extremely high standards for the accuracy, stability and safety of lifting equipment.A special bridge crane for a 150-ton power station, equipped with a double-beam heavy-duty structure and multi-drive redundancy technology, is suitable for large-load, high-precision, and restricted space hoisting scenarios in the plant, which can avoid traditional crane failures, uneven loads, positioning deviations and other disadvantages.

Ensure the smooth and accurate installation and full-cycle maintenance of heavy and valuable equipment such as steam turbine rotors and generator stators.This article analyzes the structural parameters, redundancy principle, performance advantages, safety configuration and key points of selection and maintenance of this model, and provides a professional reference for the selection of lifting equipment for steam turbine plants of electric power enterprises.

What Is a 150t Heavy Engineering Bridge Crane

The 150-ton heavy-duty engineering bridge crane is a large-tonnage bridge lifting equipment specially customized for high-end heavy industry and power station scenarios. The rated main lifting load is 150 tons. This rated parameter does not simply refer to the equipment’s own weight carrying capacity.

It is a comprehensive lifting upper limit that includes hoisting components, hoisting beams, spreaders, wire ropes and dynamic load margins. 10%-25% safety redundancy is reserved in actual operations, which can effectively resist hoisting fluctuations, weight deviations and dynamic impact forces, and adapt to heavy precision equipment hoisting conditions.

The core of the equipment adopts a double-beam bridge structure, which spans the span of the steam turbine plant as a whole, and relies on the top track system to achieve global coverage. It is the preferred structural form for large-tonnage precision hoisting scenarios.The complete set of equipment consists of five core subsystems, each performing its own duties and operating in concert to ensure the stable operation of the whole machine.：

• Main lifting mechanism: core load-bearing components, which undertake the task of 150-ton rated heavy-duty hoisting, and are suitable for the core large-scale hoisting of steam turbines and generators.；
• Auxiliary lifting mechanism: auxiliary lifting unit for small and medium loads, used for lightweight operations such as parts transfer, equipment alignment, auxiliary maintenance, etc., to improve operational flexibility；
• Lifting trolley: equipped with a lifting mechanism, it walks laterally along the main beam to achieve accurate lateral displacement and positioning of the load；
• End beam walking mechanism: connect the main beam and the track, carry the load of the whole machine and drive the crane to walk vertically and globally；
• Track operation system: The dedicated elevated track infrastructure of the plant provides support for the stable operation of the crane and the uniform transmission of the load.

Unlike high-frequency cranes for metallurgy and heavy industry, 150-ton cranes for steam turbine plants are low-frequency and highly reliable models, and most of the core large-piece hoisting is annual maintenance and unit overhaul phased operations.

Therefore, the CMAA A-level working level is adopted to ensure the performance of extreme working conditions while greatly improving the service life and operating stability of the equipment.All series are equipped with frequency conversion drive system, which can realize millimeter-level micro-speed alignment and meet the installation requirements of precision equipment.

Why Turbine Hall Installations Demand High-Reliability Crane Systems

The steam turbine plant is the core area of the power unit. The value of the hoisting operation object is extremely high, the working conditions and environment are complex, and the fault tolerance rate is extremely low. Ordinary industrial cranes cannot meet the operating requirements. It is necessary to rely on a special 150-ton bridge crane with high reliability, high accuracy and high safety.

Overweight lifting load

The core components such as steam turbine rotor, generator stator, and cylinder body can weigh up to 100 tons per unit, and the cost of a single set of unit equipment is often tens of millions. It is the core fixed asset of a power plant.The fault tolerance rate of hoisting such high-priced heavy equipment is zero.

Once there are problems such as unstable load, positioning offset, shaking and tilting, it will not only cause permanent damage to the equipment, but may also cause safety accidents, delay the production and maintenance cycle of the unit, and cause huge economic losses.Highly reliable lifting equipment is the basis for ensuring equipment safety and avoiding operational risks.

Rigorous precision hoisting

The core components of the steam turbine are not only heavy in weight, but also extremely precise. The assembly gap accuracy of the rotor and stator can reach the millimeter level, which requires extremely high lifting stability and positioning accuracy.Ordinary cranes have a large impact on start and stop, obvious shaking in operation, and uncontrollable speed, which can easily cause wear and alignment deviation of precision contact surfaces.

Limited working space in the plant

The internal equipment of the steam turbine plant is dense, the layout of pipelines, platforms, and fixed units is complex, the working space is narrow, and the hoisting path is severely restricted.During the hoisting process, heavy-duty components need to avoid all kinds of fixed equipment and accurately travel through small spaces, which requires extremely high crane walking accuracy, operating range, and geometric adaptability.

The customized design of the 150-ton bridge crane can optimize the hook stroke, end distance and lifting height, adapt to restricted space operations, and eliminate the risk of collision.

Full-cycle maintenance and adaptation requirements

The 150-ton bridge crane is not only used for one-time hoisting during the construction phase of the unit, but is the core equipment that runs through the decades-long operation cycle of the power plant.For daily maintenance, regular overhaul, and component replacement of the unit, it is necessary to rely on the crane to complete the work of rotor extraction, cylinder disassembly, and parts replacement.

This means that the reliability of the crane is just needed in the whole life cycle. A single failure and shutdown will lead to the postponement of the maintenance of the unit and the shutdown of the power plant to reduce production. Therefore, the equipment must have the characteristics of long-term stability, low failure, and easy maintenance.

Multi-Drive Redundancy: The Core Technology Behind Reliable 150t Cranes

The lifting mechanism of the 150-ton crane adopts multiple redundant safety designs and is equipped with multiple sets of independent lifting, braking, and transmission units. The braking bearing capacity reaches 150%-180% of the hoisting load, which meets international safety standards.

The electronic control system of the equipment synchronizes the operating parameters in real time to avoid problems such as partial load and stress concentration.Relying on the fail-safe braking mechanism, the load can be automatically locked in the event of failure or power failure, the risk of slipping hooks and falling objects can be thoroughly prevented, and the safety of hoisting can be guaranteed.

Cart walking

The end beams of both ends of the 150-ton crane cart are equipped with multiple sets of independent drive motors and reducers, and the distributed load sharing design is adopted.During normal operation, multiple sets of drive units operate synchronously and evenly distribute the walking load, reducing the operating load of a single component and extending the service life of the equipment.

The technology is equipped with multiple sets of independent drive units such as motor, brake, PLC control, etc. to share the equipment load.It relies on the systematic collaborative design of fault adaptation under working conditions, rather than the simple stacking of equipment, which can ensure non-stop equipment failure, balanced load, and controllable operation.

Lifting system

The lifting mechanism of the 150-ton crane adopts multiple redundant safety designs and is equipped with multiple sets of independent lifting, braking, and transmission units. The braking bearing capacity reaches 150%-180% of the hoisting load, which meets international safety standards.

The electronic control system of the equipment synchronizes the operating parameters in real time to avoid problems such as partial load and stress concentration.Relying on the fail-safe braking mechanism, the load can be automatically locked in the event of failure or power failure, the risk of slipping hooks and falling objects can be thoroughly prevented, and the safety of hoisting can be guaranteed.

Drive synchronization and intelligent control

The stable operation of multi-drive redundancy, relying on the collaborative support of a full set of intelligent electronic control systems, the core configuration includes three core modules: frequency conversion drive (VFD), encoder feedback, and PLC centralized control.：

• Variable frequency drive system (VFD): The core is responsible for speed and power control, supports stepless speed regulation and flexible start-stop throughout the process, effectively eliminates mechanical shocks during equipment start-stop and variable speed, and ensures smooth and smooth heavy-duty hoisting. At the same time, it has energy-saving cushioning effect.
• High-precision encoder feedback: As a “perception sensor” of the equipment, it collects accurate position data such as crane cart walking, trolley displacement, and lifting height in real time, and dynamically feedback the operating status of the equipment to provide core data support for accurate correction and synchronous control.
• PLC central controller: assumes the function of the system’s “central brain”, coordinates and dispatches all drive units, and completes core logic operations such as torque equalization distribution, operating speed synchronization, fuselage anti-deviation correction, and equipment failure monitoring in real time.

The linkage of the three can correct the operation problems of the cart skew, uneven load, speed deviation, etc. in real time, to ensure that multiple sets of independent drive units work together and operate stably with high precision.

How Multi-Drive Redundancy Improves Turbine Hall Crane Performance

• Equipment reliability is greatly improved: the multi-drive redundant design gets rid of the dependence of a single component and eliminates the hidden danger of a single point of failure.With the real-time fault monitoring function, abnormal motors, brakes, and loads can be identified in advance, sudden shutdowns during critical periods of overhaul and maintenance can be avoided, and the continuous and stable operation of the power plant can be guaranteed.
• More balanced load distribution and lower operation and maintenance losses: traditional single-drive models have concentrated loads and serious wear.The multi-unit load sharing structure can evenly disperse the heavy-duty pressure, reduce the local load of the motor, reducer, wheel and rail, reduce rail gnawing, deformation, structural fatigue and other problems, and extend the life of the equipment and plant structure.
• Smoother operation and protection of precision equipment: Relying on VFD flexible speed regulation and multi-drive synchronous control, the equipment realizes impact-free start and stop, uniform speed operation and precise braking, effectively suppresses load shaking and inertial offset, and protects high-precision core components such as steam turbines and generators to the greatest extent to avoid assembly damage.
• Significant upgrade of precise positioning capabilities: through PLC collaborative control and encoder high-precision feedback, the cart and trolley linkage corrects the walking deviation and fuselage skew, supports millimeter-level micro-speed alignment, adapts to the precision assembly conditions of the power station, and greatly improves the hoisting accuracy and installation efficiency.

Electrical and Control Systems for High-Capacity Bridge Cranes

The 150-ton heavy-duty crane is equipped with a full set of intelligent electronic control system, with PLC as the core, VFD as the drive, sensor as the perception, and remote operation and maintenance as the auxiliary, to achieve intelligent control of the whole process.：

• PLC centralized control system: As the control core of the whole machine, it co-ordinates and manages the whole process of walking, lifting, and safety protection, receives operating instructions and sensing signals in real time, and realizes precise logic control and fault linkage protection.；
• VFD frequency conversion drive system: supports stepless speed regulation, flexible start-stop and regenerative braking, effectively cushioning mechanical shocks, reducing operating energy consumption, and ensuring stable and controllable heavy-duty hoisting and no setbacks throughout the process.；
• Encoder position feedback: high-precision real-time collection of equipment walking and lifting position data, to provide accurate data support for drive synchronization, anti-skew correction, and millimeter-level accurate alignment to ensure equipment operation accuracy；
• Multiple overload protection: equipped with high-precision load sensors, real-time dynamic monitoring of hook load, overload conditions automatically trigger early warning and lock the lifting action to eliminate the safety hazards of overload operations from the root cause；
• Limit and emergency stop system: full coverage of two-way limit protection for lifting and walking, with multi-point emergency stop device, which can quickly cut off power and emergency braking under sudden failure conditions to achieve safe shutdown；
• Brake condition monitoring: monitor brake operating conditions and brake pad wear status in real time around the clock, predict and warn of brake hidden dangers in advance, and ensure the long-term stable and reliable operation of the brake system；
• Remote intelligent diagnosis and operation and maintenance: automatically record data such as equipment operation, hoisting load, fault log, etc., support remote monitoring, fault prediction and predictive maintenance, and can be seamlessly connected to the factory automation operation and maintenance platform.

Safety Features for 150t Heavy Engineering Cranes

Overload safety protection

Equipped with a high-precision load sensor, the hook load is dynamically monitored in real time. When the load is close to the rated limit, the system automatically triggers an early warning; when the rated load is exceeded, the lifting action is immediately locked to prevent structural deformation, component damage, falling objects and other risks caused by overloading and hoisting, and the safety of operation is guaranteed throughout the process.

Redundant protection of lifting brake

All systems adopt a dual-channel independent electromagnetic braking system, which has fail-safe characteristics, and automatically locks the brake and locks the load under power failure, failure, and emergency conditions.The brake redundancy design eliminates slip hook accidents caused by a single brake failure, multiple guarantees the safety of high-priced equipment hoisting, and adapts to the high-level safety requirements of power stations.

Anti-swing system

The intelligent anti-swing algorithm can correct the action in real time according to the load state and walking speed, suppress the swing of lifting heavy objects, and maintain the load stability without manual precise control.The anti-skew system compares the walking position of the end beams at both ends in real time, dynamically adjusts the driving speed, keeps the fuselage perpendicular to the track, and eliminates problems such as deviation, rail gnawing, and structural stress damage.

Fault emergency stop and failure

Emergency stop devices are configured in the cab, handheld remote control, and multiple locations along the track. In emergency conditions, all power can be cut off and all braking systems can be closed with one key.The equipment is equipped with ISO 13849-1 standard safety relay circuit, automatic fault alarm, controllable shutdown, to eliminate the risk of out-of-control.

Visual operation and communication system

The cab adopts a panoramic field of view design to cover the core hoisting operation area; it is equipped with an on-board surveillance camera to make up for the blind spot of the restricted space field of view.It supports three operating modes of cab operation, suspension handle, and wireless remote control, which are adapted to different operating scenarios to improve operation convenience and safety.

Designing a 150t Bridge Crane for Turbine Hall Installation

Clarify the full cycle load requirements

In the early stage of the design, it is necessary to co-ordinate the hoisting requirements of the unit construction, overhaul, and maintenance process, calculate the maximum hoisting weight, equipment center of gravity, spreader weight and dynamic load, and reserve sufficient safety margin to ensure that the equipment is adapted to heavy-duty working conditions throughout the life cycle, and avoid problems such as insufficient load and insufficient safety redundancy.

Accounting for span and lifting height

Determine the crane span according to the opening size of the steam turbine plant, and customize the lifting height based on the lifting height of the equipment, the travel of the spreader, and the safety clearance to ensure that the hook can cover all core lifting points, without operating blind spots, and adapt to the lifting needs of restricted spaces.

Match and adapt to the work level

Combined with the low-frequency and high-reliability operating characteristics of the power station, the CMAA A-level operating level is preferred, which is suitable for the core large-piece hoisting and normalization of lightweight maintenance operations several times a year, balancing equipment performance, service life and cost, and avoiding the problem of redundant waste of high-frequency models and insufficient performance of low-frequency models.

Adapt to the building structure of the plant

In the design stage, the soil construction and structural engineering teams are linked to accurately calculate the track load, column load-bearing, and roof clearance size, optimize the track installation accuracy, equipment walking clearance, and reserve sufficient maintenance and operation space to achieve seamless adaptation of equipment and plant infrastructure.

Maintenance Strategies for 150t Turbine Hall Cranes

A scientific maintenance system is the key to ensuring the stable operation of the crane throughout its life cycle. Combined with the characteristics of equipment structure and working conditions, it is necessary to establish a preventive + predictive dual maintenance mechanism.：

1. Normalized preventive inspection: Establish a standardized inspection ledger, regularly investigate core components such as motors, reducers, braking mechanisms, wire ropes, hooks, wheels and rails, and find potential hidden dangers such as wear, loosening, and aging in a timely manner to ensure the basic operating status of the equipment.
2. Special testing of key components: regularly carry out brake performance verification, wire rope nondestructive testing, wheel and rail wear measurement and electrical insulation testing, and conduct accurate verification of vulnerable and high-risk components to eliminate the risk of structural and functional failure.
3. Special maintenance of the electronic control system: regularly clean the electrical cabinet, calibrate the operating parameters of the VFD, and verify the accuracy of the encoder and sensor to ensure the stability of the control system signal and accurate operation, and maintain the high-precision control level of the whole machine.
4. Standardized lubrication and maintenance: strictly follow the manufacturer’s technical specifications, and regularly lubricate the moving parts such as transmission, walking, and rotation at fixed points to reduce mechanical friction losses and extend the service life of the equipment.
5. Intelligent predictive maintenance: relying on multi-dimensional data such as equipment load, temperature, vibration, and running time, the working condition of the equipment is dynamically judged, and hidden faults are predicted in advance to achieve on-demand maintenance, effectively reducing invalid downtime and excessive maintenance.

How to Choose a 150t Heavy Engineering Bridge Crane Manufacturer

Steam turbine plant cranes are customized high-end heavy industry equipment. The selection of manufacturers directly determines the performance and operation and maintenance guarantee of the equipment. The core selection criteria are as follows：

1. Practical experience in mature industries: with mature design, production and project landing cases of special cranes for 100-ton power plants, deep cultivation of complex working conditions in steam turbine plants, familiar with power station hoisting specifications and on-site construction requirements；
2. Professional engineering R&D capabilities: with finite element structure verification, fatigue strength verification, and redundant drive system customization design capabilities, personalized working condition adaptation design can be completed according to plant span, load characteristics, and space constraints.；
3. Core complete set of technical reserves: proficient in core key technologies such as multi-drive synchronous load, intelligent anti-skew, VFD frequency conversion, precise speed regulation, remote condition monitoring and predictive operation and maintenance；
4. Standardized quality control system: Holds a full set of ISO9001 quality system certification, and strictly implements the whole process of quality inspection standards such as factory factory testing, rated load testing, on-site commissioning and acceptance.；
5. One-stop full-process service: it can provide integrated closed-loop services for working condition survey, custom design, intelligent manufacturing, on-site installation, commissioning and acceptance, spare parts matching, and after-sales maintenance.；
6. Long-term operation and maintenance guarantee capabilities: equipped with a professional and rapid response after-sales team, it can provide technical support, equipment maintenance and system upgrade iteration services for the whole life cycle of the project.

Conclusion

The 150-ton steam turbine plant bridge crane, relying on double-beam heavy-duty structure, multi-drive redundancy technology, intelligent control and full-dimensional safety protection, is perfectly adapted to the heavy-duty, precision and restricted space hoisting conditions of the power station, and can efficiently complete the installation and maintenance of the core equipment of the unit.

The multi-drive redundant design effectively avoids a single point of failure, balances the load, and improves the stability and service life of the equipment.Henan Mine Crane can customize exclusive 150-ton bridge crane solutions according to the requirements of plant span, lifting height, operating accuracy and other working conditions to ensure the long-term safe and stable operation of power station equipment.