Bridge Overhead Crane

The Bridge Overhead Crane is a heavy-duty lifting device designed for industrial and commercial applications. As the name suggests, it features a double girder system that provides exceptional strength and stability during operation.Here are some key aspects of the product introduction for a double girder overhead crane:

Design and Structure: The Bridge Overhead Crane consists of two parallel girders or beams made from high-quality steel, providing a robust framework that can handle heavy loads. The double girder design helps in distributing the load more evenly, reducing the risk of bending or damage to the crane structure.

Lifting Capacity: Double girder overhead cranes are capable of handling very heavy loads, typically ranging from several tons to hundreds of tons, depending on the specific model and configuration. This makes them suitable for heavy industrial applications such as foundries, mills, shipyards, and large manufacturing facilities.

Overall, the Bridge Overhead Crane is a robust and reliable solution for heavy lifting needs in industrial settings. Its design and capabilities make it an invaluable asset for operations requiring the movement of large and heavy materials.

Max. Lifting Height：2.5m, 3M, 7.5m, 5M, 10M, 4M, 15M, 6m, 20M, Other

Warranty:1 Year

Weight (KG):200000 kg

Max. Lifting Load:100ton

Span:Clients' Requirements

Crane control mode: Floor control / Remote control / Cabin room

Whole set crane

A travelling gantry crane is a type of lifting device that consists of a horizontal beam or gantry, supported at both ends by vertical columns. The entire structure moves along rails or tracks on the ground, allowing the Bridge Overhead Crane to cover a larger area than a fixed crane. The crane can be equipped with various types of hoists and lifting mechanisms to handle different materials and loads.

Main girder

The main girder of a double girder overhead crane is a critical structural component that provides the primary support for the crane's lifting mechanism and carries the load during operation. Here are some key aspects of the main girder in a double girder overhead crane:

Design and Construction: The main girder is typically constructed from high-strength steel, ensuring it can withstand the heavy loads and stresses encountered during lifting operations. It is designed to be rigid and sturdy, minimizing deflection and maintaining stability even under full load capacity.

Function: The main girder serves as the foundation for the hoisting mechanism, which includes the hoist itself (such as a wire rope hoist or chain hoist), trolley, and other related components. It allows the hoist to move along its length, enabling precise positioning of the load.

Double Girder Configuration: In a double girder overhead crane, there are two main girders parallel to each other. This dual-beam configuration enhances the crane's lifting capacity and stability compared to single girder systems. The girders are connected at regular intervals by cross-braces or tie rods, which further strengthen the structure and maintain the alignment of the girders.

Load Distribution: The double girder design helps distribute the load more evenly across the crane, reducing the potential for uneven wear and tear on the crane's components. This distribution also helps in reducing the bending moment on the main girder, extending its lifespan and maintaining operational efficiency.

The main girder of a double girder overhead crane plays a vital role in supporting the crane's lifting operations. Its robust design and construction make it suitable for handling heavy loads in industrial environments, contributing to the overall performance and reliability of the crane.

3. Lifting System

The lifting system of a Bridge Overhead Crane is a complex and crucial component that enables the crane to perform its primary function: lifting and moving heavy loads. This system consists of several elements working together to ensure safe and efficient operation. Here's a breakdown of the main components and their functions:

Hoist Mechanism

The hoist mechanism is the central element of the lifting system. It typically includes:Hoist Drum(s) or Winding Gear: One or more drums around which wire ropes or chains are wound, used for lifting and lowering the load.

Hoist Motor(s): Electric motor(s) power the drum(s), controlled by operators to lift or lower the hook and consequently the load.

Hook or Grappler: The device at the end of the lifting mechanism, which attaches to the load.

Trolley System

The trolley allows the hoist to move horizontally along the girder:

Trolley Wheels: Mounted on the girder, these wheels allow the hoist to traverse back and forth.

Trolley Motor: Powered by an electric motor, it propels the trolley along the girder, thereby moving the load horizontally.Wire Ropes or Chains

Used to connect the hoist drum to the hook, these are essential for lifting:

Wire Ropes: Typically used in wire rope hoists, they have high elasticity and can be used for deep lifting.

Chains: Used in chain hoists; they provide a more rigid lifting option with less elasticity than wire ropes.

Load Block

The load block is attached to the hook and contains sheaves (pulleys) to guide the wire ropes or chain:

Sheaves: They reduce the force required to lift heavy loads by redirecting the angle of the wire rope or chain.

Each component of the lifting system is designed with precision to ensure that the Bridge Overhead Crane can handle heavy loads safely and efficiently. Proper maintenance, including regular inspections and necessary lubrication, is essential to maintain the smooth operation of the lifting system and to prevent accidents or downtime due to equipment failure.

 

4.End Carriages

End carriages, also known as end trucks or end wheels, are critical components of a double girder overhead crane. They play a vital role in supporting the crane's structure and enabling it to move along the runway beam. Here's a detailed explanation of end carriages:

Design and Functionality

End carriages are located at both ends of the double girder overhead crane and are responsible for connecting the crane to the runway beam. Each end carriage typically consists of:

Wheels or Rollers: These are mounted on an axle and ride along the top of the runway beam, allowing the crane to travel back and forth. The wheels are usually made of durable materials such as steel or cast iron to withstand the heavy loads and frequent movement.

Bearings and Axles: The axles support the wheels and are equipped with bearings to ensure smooth rotation. These bearings are critical for reducing friction and wear, which can impact the crane's performance and lifespan.

Mounting Hardware: This includes bolts, pins, and other fasteners that securely attach the end carriage to the crane's girder. Proper mounting is essential to maintain the structural integrity of the Bridge Overhead Crane during operation.

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Crane traveling mechanism

The crane traveling mechanism of a double girder overhead crane enables the crane to move along its fixed runway beam or rail. This mechanism is crucial for positioning the crane to lift and transport loads to different locations within its operational area. Here's a detailed description of the components involved in the crane traveling mechanism:

End Trucks or End Wheels: These are located at both ends of the crane and support the weight of the crane while allowing it to move along the runway beam. The end trucks typically consist of wheels or rollers that run along the top of the runway beam.

Drive Wheels/Motors: One or more wheels on the end trucks may be powered to propel the crane along the runway beam. These drive wheels are typically connected to electric motors that provide the necessary force to move the Bridge Overhead Crane.

Runway Wheels: In addition to the drive wheels, there are usually additional non-powered wheels on the end trucks that run along the runway beam. These wheels stabilize the crane and distribute its weight evenly.

Electric Motors: The electric motors are responsible for powering the drive wheels. They are controlled by the crane's operator using a pendant or radio remote control system.

During operation, the crane traveling mechanism works in coordination with the hoisting mechanism and trolley system. As the crane moves along the runway beam, the hoisting mechanism can lift or lower the load, and the trolley system can move the load horizontally along the girder. This coordinated movement allows for precise positioning of the load in three dimensions within the crane's operational area.

6.Trolley traversing mechanism

Components of the Trolley Traversing Mechanism

1.Trolley: The trolley is a wheeled carriage that rides on flanged tracks or rails mounted on the top of the girders. It contains the hoist mechanism and is responsible for moving the hoist along the girder.

2.Trolley Wheels: These wheels are mounted on the trolley and run along the flanged rails or tracks on the girder. They support the weight of the hoist and the load being carried.

3.Drive Wheels/Motors: One or more wheels on the trolley may be powered to move the trolley along the girder. These drive wheels are typically connected to electric motors that provide the necessary force to propel the trolley.

7.Crane wheel

The crane wheels of a double girder overhead crane are crucial components that allow the crane to move along its runway beam or rail. These wheels are designed to support the weight of the Bridge Overhead Crane and its loads, ensuring stable and reliable movement. Here's a detailed explanation of the crane wheels and their functions:

2.Types of Crane Wheels

Crane wheels can be categorized based on their design and functionality:Runway Wheels: These wheels are mounted on the end trucks at both ends of the crane and run along the top of the runway beam. They are responsible for supporting the weight of the crane and allowing it to move back and forth along the beam. Runway wheels can be further classified into:.Flanged Wheels: These wheels have a flange on one or both sides to prevent the crane from accidentally derailing from the runway beam. Non-flanged Wheels: Without the flange, these wheels rely on the design of the runway beam to keep the crane in place.

 

 

8.Crane hook

The crane hook of a Bridge Overhead Crane is the component at the bottom of the lifting mechanism that directly attaches to the load. The hook is a critical part of the crane's hoisting system and is designed to lift, lower, and move loads safely and efficiently. Here's a detailed description of the crane hook and its functions:

Components of the Crane Hook

Hook Body: The hook body is the main structure of the hook and is typically made from high-strength steel. It has an opening at one end for attachment to the lifting cable or chain and a curved end for engaging with the load.

Throat: The throat is the curved end of the hook where the load is engaged. It is designed to securely hold the load during lifting and prevent it from slipping off.

Safety Latch: Many hooks are equipped with a safety latch or locking mechanism that secures the load to the hook. This latch helps to prevent accidental release of the load and increases safety during operation.

Attachment Point: The attachment point is where the hook connects to the lifting cable or chain. This connection must be secure and capable of withstanding the forces exerted during lifting operations.

Handle: Some hooks may have a handle or loop for manual engagement and disengagement of the load. This handle can also be used to control the orientation of the load during lifting.

 

 

9.Motor

1.The motor of double-beam bridge crane is the key component of the crane power source, responsible for providing the necessary power for the lifting mechanism and the running mechanism of the cart and the trolley.

2.In the double-beam bridge crane, the selection and application of the motor is very important, and its performance directly affects the operating efficiency and stability of the Bridge Overhead Crane. Since this type of crane is designed to handle heavy loads, the motor must be able to provide enough power and torque to lift and move heavy loads smoothly. The motor is generally located at both ends of the main beam and on the lifting trolley, and is connected with the drum, pulley and wheel through the precision transmission system to ensure that all parts can work synchronously and efficiently.

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Sound and light alarm system & limit switch

1.The audible and visual alarm system and limit switch of the double-beam bridge crane are key components to ensure safe operation, alerting the operator and preventing the crane from operating beyond the limit.

2.The audible and visual alarm system is mainly responsible for sending visual and auditory signals under specific conditions to remind the surrounding personnel and operators to pay attention to the status of the Bridge Overhead Crane. These specific conditions include cranes reaching operating boundaries, loads exceeding design limits, or failures. For example, when a crane nears the end of its track, an audible and visual alarm system activates, alerting the operator to the need to slow down or stop through flashing lights and a loud alarm tone.

3.The limit switch is a safety protection device used to automatically cut off the power source when the crane components reach their physical limit position, so as to avoid equipment damage and safety accidents. According to the regulations of the State Administration for Market Supervision and Administration, all newly delivered bridge cranes must be installed with two sets of different forms of height limit devices to ensure the safety of the lifting mechanism

Safety Devices

Bridge overhead crane Safety Devices:

The safety equipment of the bridge crane includes a variety of mechanical and electrical protection devices designed to ensure the safety of the operator and equipment. These safety devices are designed to provide maximum safety during crane operation and prevent accidents. The details are as follows:

1.Limit switch and safety brake:

The upper limit switch and lower limit switch of the lifting mechanism ensure that the hook operates within a safe range and avoids excessive winding or excessive lowering.

The safety brake can start quickly in unexpected situations (such as motor loss of power) to ensure that the lift will not accidentally fall.

2.Overload limiter and load display:

The overload limiter monitors the weight of the items being lifted and, once the maximum rated load of the crane is exceeded, will sound an alarm and stop the lifting operation to protect the Bridge Overhead Crane and avoid structural damage.

The large screen display is used to display the current load weight in real time to remind the operator to pay attention to the load.

3.Anti-collision system and audible and visual alarm:

The anti-collision system uses radar or infrared detectors to detect obstacles within the working range and prevent collisions between the various components of the crane.

The audible and visual alarm system reminds the operator to take timely measures through sound and light when the crane is near the end of its track or there is an operation anomaly.

4.Protective railings and buffers:

The high-altitude operating platform and walkway are equipped with protective railings to ensure the safety of the operator when working at a high altitude and prevent accidental falls.

The buffer is installed on the walking mechanism of the crane, which can reduce the impact force when it encounters the end of the track or other obstacles, and protect the equipment and structural stability.

5.Emergency shutdown and maintenance protection:

The emergency stop button can immediately cut off the power in an emergency and stop all actions of the crane to cope with emergencies.

During maintenance and inspection, locking protection devices are applied to ensure that maintenance personnel can perform maintenance without danger.

6.Personal Protective Equipment and operating Procedures:

All operators must wear personal protective equipment such as hard hats, protective shoes and safety ropes to ensure personal safety during operation.

Strict operating procedures and training procedures ensure that operators have the necessary skills and knowledge to regulate operating behavior and reduce safety incidents.

7.In summary, the safety equipment equipped with double-beam bridge cranes not only covers a variety of mechanical and electrical protection devices, but also includes strict operating procedures and personal protection measures. These multi-level safety measures work together to provide a comprehensive safety guarantee for Bridge Overhead Crane operation. In actual operation, these safety equipment should be regularly checked and maintained to ensure that they are in good condition, so as to effectively prevent and reduce accidents.

 

Control Mode

Crane control mode cover the operation room control, ground wired control, wireless control and multi-point control and other ways, with the progress of technology, intelligent control has become a new trend in the development of cranes. In specific applications, these control methods can be selected or combined according to the actual needs and working environment to achieve the best operating results. The following is a detailed introduction to the main control methods of the crane:

1.Operation room control

Button control box: The button control box is provided with control buttons, control switches and indicators, which can be used separately to control the crane or combined with other controllers.

CAM controller: It is used to convert the wiring of the main circuit and the control circuit in a predetermined sequence to control the starting, speed regulation, braking and reversing of the motor. A CAM controller can generally control only one or two transmission mechanisms, if you need to control more transmission mechanisms, you need multiple CAM controllers.

Linkage controller: Based on the principle of CAM controller, through the centralized control of each transmission mechanism, to achieve simple operation. The left and right control boxes of the linkage controller can realize the operation of each transmission mechanism, including the linkage operation of the double transmission mechanism.

Industrial computer: The use of advanced control schemes (such as frequency conversion technology combined with PLC control technology), remote control through computer hardware and software and network. Due to the special environment and high requirements of the crane, the use conditions of the computer are strict.

2.Ground wired control

Control device: The operator operates the button, switch and other operating elements on the suspended control device on the ground, and controls the motor of the crane transmission mechanism through the signal transmission of the suspended communication cable.

Safety requirements: The power supply in the ground wired control device should not exceed 250V, the housing material should be completely insulated or with insulating protective layer, and the metal housing or metal parts that can be directly touched should be individually grounded.

3.Wireless control,Multipoint control,Intelligent control. In summary, the control mode of the crane has developed from the traditional operation room control and ground wired control to wireless control and intelligent control, and constantly adapt to the needs of modern industrial production. In the future, with the continuous progress of technology, the control mode of the crane will be further developed towards automation, intelligence and remote, so as to improve operational efficiency and safety.

 

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1.Reasonable structure

Light weight and large load: the double-beam bridge adopts two main beams and two end beams to form the bridge frame, which not only reduces the weight, but also improves the load capacity. The main beam mainly adopts I-beam or steel plate composite section, which enhances the bearing capacity of the whole structure.

Strong wind resistance: The structure of the double-beam bridge makes it have good wind resistance and can operate normally in bad weather conditions. This feature is especially important for outdoor operations to ensure stable operation of the equipment.

2.Superior performance

Efficient handling: The lifting mechanism, trolley operation mechanism and trolley operation mechanism of the double-beam bridge ensure its flexible movement in the three-dimensional space, and can efficiently handle and load and unload materials. This design greatly improves the working efficiency and reduces the working time.Easy to adjust: the lifting weight, lifting height, span and other parameters of the crane can be adjusted according to the work needs. This allows the double-beam bridge to adapt to different working environments and task requirements, providing customized services.

3.Easy to operate

Advanced control system: Equipped with advanced control system, you can achieve automated operations, only a simple setting can achieve precise control. This system not only improves operational efficiency, but also reduces the risk of human error.

Easy maintenance: Due to the relatively simple structure, the maintenance of the double-beam bridge is very convenient, only need to check and replace the vulnerable parts regularly. Fewer parts and easy access further reduce maintenance costs.

4.Safe and reliable

Multiple safety protection: equipped with overload limiter, height limiter, travel limit switch and various interlocking mechanisms to ensure that the equipment operates within a safe range. These devices can effectively prevent improper operation and equipment failure, and ensure the safety of personnel and equipment.

Strict quality control: The double-beam bridge machine has undergone strict quality control and testing in the manufacturing process to ensure that each component meets national safety standards. This high standard manufacturing process ensures the long-term stable operation of the equipment.

5.Energy saving and environmental protection

Low energy consumption and low noise: the equipment can effectively reduce energy consumption and noise during operation, which meets the requirements of green construction. The advanced power system and transmission system design make the double-beam bridge more energy efficient during operation with less impact on the environment.

6.Long service life

High-strength steel: The main beam is made of high-strength steel with strong wear resistance and corrosion resistance. This material choice guarantees a long service life in harsh environments, usually up to 20 years or more.

7.Convenient transportation

Easy disassembly: the elastic rod legs and site steering of the double-beam bridge can be disassembled into a single part, which is easy to transport and install on site. The unique steel pin connection is not only firm and reliable, but also greatly reduces the assembly time.

 

 

1.Industrial production

Workshop operation: The double-beam bridge is used in all kinds of production workshops for handling and loading and unloading raw materials, semi-finished products and finished products, especially in steel manufacturing, automobile manufacturing and other industries, and its efficient operation greatly improves production efficiency.

Equipment maintenance: In the maintenance and overhaul of large equipment, the double beam bridge is used to lift heavy parts and ensure that the equipment can be put back into production in the shortest time.

2.Port terminal

Cargo handling: The double-beam bridge is used to load and unload containers and bulk cargo in the port terminal, and its large span and high lifting height meet the operational needs of large ships, which greatly improves the cargo handling efficiency.

Equipment maintenance: In the maintenance of port equipment, double beam bridge is widely used to lift heavy equipment and components, reducing maintenance time and improving equipment utilization.

3.Logistics warehousing

Warehouse management: The double-beam bridge is used in large warehouses for storing and handling bulk goods, and its flexible operation and efficient handling capabilities make inventory management more convenient.

Distribution center: In the logistics distribution center, the double-beam bridge is used to sort and pack goods, ensuring timely and accurate order processing.

4.Building construction

Construction operations: The double-beam bridge is used in the construction site to lift concrete components, steel bars and large decoration materials, and its high strength and stability meet the needs of complex construction environments.

Equipment installation: During the installation of construction equipment, the double beam bridge is responsible for the lifting and positioning of large equipment to ensure accurate and efficient installation of equipment.

5.Special environment

High temperature operation: The double-beam bridge can operate in a high temperature environment, such as the metallurgical industry, and its high temperature resistance design ensures the normal operation of the equipment.

Hazardous environment: In high-risk environments such as chemical production and handling, the remote operation mode of the double-beam bridge ensures a safe distance for personnel and reduces operational risks.

 

 

1.Industrial production

Workshop operation: The double-beam bridge is used in all kinds of production workshops for handling and loading and unloading raw materials, semi-finished products and finished products, especially in steel manufacturing, automobile manufacturing and other industries, and its efficient operation greatly improves production efficiency.

Equipment maintenance: In the maintenance and overhaul of large equipment, the double beam bridge is used to lift heavy parts and ensure that the equipment can be put back into production in the shortest time.

2.Port terminal

Cargo handling: The double-beam bridge is used to load and unload containers and bulk cargo in the port terminal, and its large span and high lifting height meet the operational needs of large ships, which greatly improves the cargo handling efficiency.

Equipment maintenance: In the maintenance of port equipment, double beam bridge is widely used to lift heavy equipment and components, reducing maintenance time and improving equipment utilization.

3.Logistics warehousing

Warehouse management: The double-beam bridge is used in large warehouses for storing and handling bulk goods, and its flexible operation and efficient handling capabilities make inventory management more convenient.

Distribution center: In the logistics distribution center, the double-beam bridge is used to sort and pack goods, ensuring timely and accurate order processing.

4.Building construction

Construction operations: The double-beam bridge is used in the construction site to lift concrete components, steel bars and large decoration materials, and its high strength and stability meet the needs of complex construction environments.

Equipment installation: During the installation of construction equipment, the double beam bridge is responsible for the lifting and positioning of large equipment to ensure accurate and efficient installation of equipment.

5.Special environment

High temperature operation: The double-beam bridge can operate in a high temperature environment, such as the metallurgical industry, and its high temperature resistance design ensures the normal operation of the equipment.

Hazardous environment: In high-risk environments such as chemical production and handling, the remote operation mode of the double-beam bridge ensures a safe distance for personnel and reduces operational risks.

 

 

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached.

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