Overhead Shop Bridge Crane

Overhead Shop Bridge Crane is a kind of heavy-duty material handling equipment widely used in various factories, warehouses, docks, construction sites and other places. It has stable performance, efficient carrying capacity and flexible operation mode, and is suitable for heavy lifting, handling and loading and unloading tasks in various environments.

Due to the support of the double-beam structure, the lifting weight range is large, usually reaching several tons to hundreds of tons, which is suitable for the handling and lifting of heavy objects. The double-beam bridge design enhances the rigidity of the structure, reduces the shaking of the crane during operation, and ensures the safety and precision of operation. The lifting trolley of this crane can move longitudinally along the crossbeam, and the bridge can move laterally along the track, which can cover the entire working area and realize a wide range of material transportation. It can be customized according to the special needs of users and is suitable for a variety of working environments, such as high temperature, low temperature, humidity, corrosive environment, etc. Through remote control operation or cab operation, the equipment design is ergonomic and reduces the labor intensity of the operator.

3. Overhead Shop Bridge Crane has become an indispensable and important equipment in many industrial sites with its efficient, reliable and flexible performance.

Warranty of core components：1 Year

Core Components：Engine, Bearing, Gearbox, Motor, Pressure vessel

Warranty：1 Year

Weight (KG)：10000 kg

Feature：Bridge Crane

Condition：New

Rated Lifting Moment：5-500 tons

Max. Lifting Load：500 tons

Span：4.5-31.5m

Keywords：Double Girder Overhead Crane

Power supply：3 Phase AC 380V 50HZ

Control method：remote Control, pendent control,cabin control

Lifting mechanism：Electric Hoist or trolley

Crane type：Double Girder

Travelling speed：20m/min,30m/min

Lifting speed：0.8/5m/min 1/6.3m/min

Pictures & Components

1.Main beam

1) Structural form of main beam

The main beam of Overhead Shop Bridge Crane usually adopts box structure or truss structure. The specific design is determined according to the load-bearing requirements and working environment of the crane.

Box structure: This structure is common in heavy-load cranes. It is a closed box welded from steel plates. It has high strength and torsion resistance and is suitable for heavy equipment lifting.

Truss structure: It is used in some occasions with small load capacity or weight requirements. It is usually used when the dead weight requirement is light or the span is large. It can save materials and reduce the weight of the bridge.

2) Materials and manufacturing process

The main beam is usually made of high-quality steel, such as structural steel such as Q235 or Q345, to ensure that it has good strength and toughness. During the manufacturing process, the main beam needs to undergo strict processing and welding processes to ensure its structural integrity and load-bearing capacity. After welding is completed, flaw detection is usually required to ensure that there are no weld defects, thereby improving safety.

Lifting System

Characteristics of the lifting mechanism

1) Strong lifting capacity: The lifting mechanism of the double-beam bridge crane has a strong lifting capacity and can carry heavy objects ranging from a few tons to hundreds of tons. The specific lifting capacity depends on the specifications and design parameters of the crane.

2) Stable operation: By using high-efficiency reducers and precision pulleys, the lifting mechanism can ensure the smooth operation of heavy objects during lifting and lowering, reducing shaking and impact.

3) High safety: The lifting mechanism is usually equipped with a variety of safety devices, such as limit switches, anti-fall devices, overload protection systems, etc., to ensure the safe lifting and lowering of heavy objects during operation.

4) High precision: The lifting mechanism has high control accuracy, especially in occasions where precise positioning and lifting are required, it can achieve precise control of heavy objects.

 

 

 

3.End carriage

Design features of end beams

1) High rigidity and strength: The end beam needs to bear the total weight of the bridge and the lifting object, so its design has high rigidity and strength to resist the impact of dynamic loads, especially under heavy loads or frequent use.

2) Precise symmetry: In order to ensure the smooth operation of the crane on the track, the design of the end beam requires a high degree of symmetry and precision. The installation position of the running wheel, the spacing of the wheelbase, the contact surface with the track, etc. must be accurate to avoid deviation or uneven wear.

3) Compact structural design: The end beam is usually designed to be relatively compact to save space and materials while ensuring structural strength. Especially in some space-constrained applications, the compact end beam design can improve the adaptability of the equipment.

 

4.Crane travelling mechanism

Characteristics of the crane operating mechanism

1) Powerful driving force: The crane operating mechanism usually requires a large driving force, especially when operating with heavy loads. The power of the motor and reducer must be large enough to ensure that the crane can still run smoothly when fully loaded.

2) High stability: By using an efficient reducer and an appropriate braking system, the crane operation can remain stable, avoiding the impact caused by sudden acceleration or deceleration when starting or stopping, reducing equipment wear and improving safety.

3) Wide operating range: The design of the crane operating mechanism enables the crane to cover a wide working area. Through electric control, it can be accurately positioned at any position in the working area, ensuring the flexibility and efficiency of material transportation.

4) Easy operation: The crane operating mechanism is usually operated by a remote control or a console in the cab, and the operator can easily control the start, stop, forward and backward of the crane.

5.Trolley travelling mechanism

In order to ensure the long-term stability and safety of the trolley's operating mechanism, daily maintenance is very important. The following are common maintenance tasks:

1) Wheel inspection: Regularly check the wear of the wheels to ensure that the wheels are in good contact with the track to prevent wheel rim wear or cracks. The wheels should be replaced in time if necessary.

2) Lubrication maintenance: Regularly lubricate key components such as drive wheels, bearings, and reducers to reduce friction, extend the service life of the equipment, and maintain the smooth movement of the trolley.

3) Motor and reducer maintenance: The motor and reducer are the core driving parts of the trolley. It is necessary to check their working status regularly to ensure that the output power is normal, the reducer oil level is sufficient, and the gears are prevented from wearing or overheating.

4) Brake inspection: The sensitivity and reliability of the braking system directly affect the safe shutdown of the trolley. Therefore, the brakes should be checked regularly and adjusted or replaced if necessary.

5) Track inspection and cleaning: Regularly clean the tracks on the main beam to avoid dust or debris affecting the smooth operation of the trolley. At the same time, check the flatness of the track to ensure that there is no deformation or excessive wear.

6.Crane wheel

1) Design features of wheels

High load-bearing capacity: The wheels must be strong enough to bear the weight of the crane itself and the load of the lifting object. Especially when operating under heavy load conditions, the materials and design of the wheels need to withstand great pressure and friction.

Wear resistance: The wheels are in contact with the rails for a long time, and wear will occur during operation. Therefore, the design of the wheels focuses on improving their wear resistance. The service life of the wheels is usually extended by surface heat treatment or the use of high-strength materials.

Anti-deviation design: The flanges on both sides of the wheels effectively prevent the wheels from derailing or deviating on the rails, ensuring the stability of the crane during operation.

Low friction coefficient: The contact surface between the wheel and the rail is carefully designed to reduce friction and reduce 2) Working principle of the wheel

The wheel contacts the rail through the drive system, and the drive motor provides power. The wheel rolls along the rail, thereby driving the crane to move. The driving wheel is responsible for providing driving force, while the driven wheel assists in maintaining balance. The stability during walking depends on the manufacturing accuracy of the wheel and the matching degree with the rail.

7.Crane Hook

As the end effector of the lifting mechanism, the hook mainly completes the work through the following steps:

1) Grab the heavy object: The hook is inserted into the ring or sling on the heavy object through the hook tip, and the hook tongue (if any) is automatically closed to ensure that the heavy object is safely hung.

2) Lift the heavy object: The lifting mechanism is started, and the hook and the heavy object are lifted to a predetermined height through a wire rope or chain.

3) Move and position: The hook can be horizontally displaced through the crane's trolley and car running mechanism to ensure that the heavy object is transported to the desired location.

4) Put down the heavy object: At the target location, the hook is gradually lowered by controlling the lifting mechanism until the heavy object is safely placed on the ground or in a designated area. The hook tongue opens and releases the heavy object.

Motor

Daily maintenance of the motor is the key to ensure the safe and stable operation of the double-beam bridge crane. The following are the key points of motor maintenance:

1) Regularly check the wiring and cables of the motor: Make sure that the cables are not worn, aged or loose to avoid electrical failures.

2) Lubricate the bearings: For motors with rolling bearings, regularly add or replace grease to ensure that the bearings run smoothly and reduce friction and wear.

3) Clean the motor: Keep the surface of the motor clean to prevent dust, impurities, etc. from entering the motor and affecting heat dissipation and operation.

4) Detect insulation resistance: Regularly check the insulation resistance of the motor to ensure that its insulation performance is good and prevent leakage or short circuit.

5) Temperature monitoring: The motor will generate heat during operation, and the operating temperature of the motor needs to be monitored by a temperature sensor or thermal protection device to prevent overheating damage.

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Sound and light alarm system & limit switch

1) Sound and light alarm system

The sound and light alarm system is used to send out warning signals during the operation of the crane to remind the operator and surrounding staff to pay attention to the operating status and potential dangers of the equipment. This system is usually activated in the following situations:

Overload alarm: When the hoisting load exceeds the rated load of the crane, the system will issue a sound and flash light prompt.

Lifting/descending limit: When the hook or other moving parts reach the set lifting or descending limit, the system will alert the operator to prevent equipment damage.

Operation status indication: When the crane starts, stops or changes the running direction, the sound and light alarm system will issue a corresponding alarm to improve operational safety.

2) Limit switch

The limit switch is used to monitor the position of each moving part of the crane to prevent it from exceeding the set range. Its main functions include:

Lifting limit: Prevent the hook or other lifting equipment from exceeding the highest point during lifting, avoiding equipment damage or accidents due to exceeding the limit.

Descending limit: Prevent the hook from exceeding the lowest point during descent, ensure the safe landing of heavy objects, and avoid damage to the ground or hoisted objects.

Horizontal displacement limit: When the trolley or car moves, monitor its operating range to ensure that it does not exceed the end point of the track.

10.Safety Devices

1) Overload protection device: Prevent the hoisted weight from exceeding the rated load of the crane, and avoid equipment damage or accidents caused by overload.

2) Limit switch: Monitor the position of each moving part of the crane to prevent it from exceeding the set range.

3) Sound and light alarm system: Issue a warning signal during the operation of the crane to remind the operator and surrounding staff to pay attention to the operating status and potential dangers of the equipment. Including sound alarm and light alarm, which will sound an alarm when overload, limit or other abnormal conditions occur.

4) Braking device: Ensure that the crane can stop moving quickly and safely when needed.

5) Safety device: Prevent heavy objects from falling accidentally in the event of a fault or abnormal situation. Generally composed of anti-fall device and anti-unhook device. The anti-fall device can be automatically locked in the event of a fault to prevent the hook from falling off.

6) Protective cover and guardrail: Protect the operator from accidental collision or heavy objects falling.

7) Electrical protection device: Protect the electrical system and equipment to prevent electrical faults such as overcurrent and overvoltage.

8) Safety signs and operating procedures: provide safe operation guidance and remind operators to pay attention to safety matters.

9) Emergency stop device: quickly stop the equipment in an emergency to protect the safety of operators and equipment.

11.Control Mode

1) Manual control: Direct control of the various moving parts of the crane is achieved through manual operation of manual controllers (such as buttons, rockers, etc.). Simple operation, easy maintenance and repair. Low cost, suitable for occasions where the operating accuracy is not high.

2) Electric control: Automatic control of the various moving parts of the crane is achieved through the electric control system. Commonly used control systems include contactor control and PLC control. High control accuracy and multiple operation modes can be achieved. Suitable for large-scale production or complex lifting operations to improve work efficiency.

3) Remote control: The movement of the crane is controlled by a wireless remote control, and the operator can operate at a safe distance. Improve operational safety and avoid people approaching dangerous areas. High flexibility, suitable for complex or special working environments.

4) Automatic control: Use advanced control technology (such as automatic control systems, sensors and computer systems) to automatically monitor and control the operation of the crane. High automation, reduce manual operation and improve work efficiency.

5) Variable frequency speed control: The frequency converter is used to adjust the speed of the motor to achieve smooth control of the various moving parts of the crane. It has good speed regulation performance and can achieve smooth starting and stopping.

12.Sketch

Main technical

 

 

1. Strong carrying capacity

High rated load: The double-beam design enables the crane to carry heavier objects, suitable for heavy lifting operations, and is widely used in metallurgy, shipbuilding, construction and other industries.

2. Good stability

Strong structural rigidity: The main beam of the double-beam bridge crane consists of two parallel beams, which makes the overall structure more stable and can effectively disperse the load.

Strong anti-overturning: Due to its wide supporting base, it can effectively resist overturning and rollover, and improve operational safety.

3. High lifting height

High space utilization: The double-beam design allows the crane to have a large lifting height, which is suitable for occasions where operations need to be performed at high altitudes, and can effectively utilize the vertical space of the factory.

4. Wide driving range

Strong adaptability: The crane can move freely on a long track, which is suitable for the lifting needs of a large working area and can cover a large working range.

5. Easy to operate

Multiple control methods: It can be operated in a variety of ways such as manual, remote control or automatic control, which is convenient for users to choose the appropriate operation method according to actual needs.

6. Easy maintenance

Reasonable design: The various components of the double-beam bridge crane are reasonably arranged, which is convenient for daily maintenance and overhaul, and reduces maintenance costs.

7. High safety

Multiple safety devices: Equipped with multiple safety devices such as limit switches, overload protection devices, sound and light alarm systems, etc., which can effectively prevent accidents and ensure the safety of operators and equipment.

8. Smooth operation

Frequency conversion speed regulation: It can achieve smooth starting and stopping, reduce impact force, reduce wear on equipment, and improve work efficiency.

 

 

1. Manufacturing industry

Heavy machinery manufacturing: In machinery manufacturing plants, double-beam bridge cranes are often used to move heavy machine tools, parts and assembly line heavy objects to ensure the efficiency and safety of the production process.

Automobile manufacturing: Used for assembly, handling and testing of automobile production lines, capable of handling the lifting of large parts and complete vehicles.

2. Metallurgical industry

Steel mills: In the process of steel smelting, casting and processing, double-beam bridge cranes are used to move steel billets, castings and other heavy objects to ensure production continuity and safety.

Metal processing: In metal processing workshops, cranes are used to transport raw materials and finished products, providing efficient logistics support.

3. Construction industry

Construction site: On construction sites, double-beam bridge cranes are used to lift and move construction materials (such as steel beams, concrete components, etc.) to improve construction efficiency and safety.

High-rise buildings: In the construction of high-rise buildings, cranes can perform lifting operations at different heights to ensure the smooth progress of construction.

4. Ports and docks

Container loading and unloading: In ports and docks, double-girder bridge cranes are widely used in container loading and unloading operations, which can efficiently handle large quantities of goods and improve logistics efficiency.

Cargo handling: Suitable for the handling and loading and unloading of a variety of goods, especially in the handling of large goods and bulk goods.

5. Warehousing and logistics

Cargo storage: In large storage centers, double-girder bridge cranes are used to handle heavy goods, improve the efficiency of storage and retrieval, and optimize warehouse management.

Automated logistics: Combined with automated equipment, it improves the intelligence level of cargo handling.

6. Energy industry

Power plants: In the power industry, double-girder bridge cranes are used to carry power generation equipment, heavy components and maintenance tools to ensure the normal operation and maintenance of equipment.

Wind power and nuclear power: In wind farms and nuclear power plants, cranes are used to install and maintain large equipment to ensure the safety of energy production.

7. Aerospace

Aircraft manufacturing and maintenance: In the aerospace field, double-girder bridge cranes are used to hoist and move aircraft components to ensure high-precision and safe assembly and maintenance operations.

 

 

1. Design stage

Overhead Shop Bridge Crane

Requirement analysis: Understand the specific needs of customers, including the rated load, working environment, span and lifting height of the crane.

Technical design: Structural design is carried out according to the needs, including detailed design of components such as main beam, end beam, trolley, lifting mechanism, walking mechanism, etc.

Material selection: Select suitable materials, such as steel, aluminum alloy, etc., to ensure the strength and durability of the structure.

Calculation and simulation: Use computer software for structural analysis and simulation to verify the feasibility and safety of the design.

2. Material procurement

Procurement plan: Develop a material procurement plan according to design requirements.

Supplier selection: Select suitable suppliers to ensure the quality and delivery time of materials.

Material inspection: After receiving the materials, quality inspection is carried out to ensure that they meet the design standards.

3. Manufacturing stage

Main beam processing:

Cutting: Cut the steel into the required length and shape according to the design drawings.

Welding: Weld the cut steel to form the frame structure of the main beam.

Grinding and spraying: After welding, the main beam is polished to remove welding marks and sprayed with anti-rust paint to improve corrosion resistance.

Manufacture other parts:

End beam: Similar to the main beam, cut, weld and surface treat.

Trolley: Make the frame of the trolley and install the drive motor and travel wheels.

Lifting mechanism: Manufacture lifting components such as motors, drums, hooks, etc. to ensure that their performance meets the standards.

4. Assembly stage

Preliminary assembly: Perform preliminary assembly of various components in the factory to ensure that all parts fit well.

Connect the electrical system: Install the electronic control system, including motors, inverters, control panels, etc.

Install safety devices: Install safety devices such as limit switches, overload protection devices, sound and light alarms, etc. to ensure safe operation.

5. Testing stage

No-load test: Perform no-load test on the assembled crane to check whether the operation of each component is normal.

Load test: Perform load test in a safe environment to ensure the stability and safety of the crane under rated load.

Safety performance test: Test the functions of various safety devices to ensure that they can work normally under abnormal conditions.

6. Debugging and optimization

System debugging: Debug the electronic control system and various mechanisms to ensure flexible and stable operation.

Performance optimization: Make necessary adjustments and optimizations based on the test results to improve the overall performance of the equipment.

7. Delivery and installation

Customer training: Provide equipment operation training to customers before delivery to ensure that operators have mastered the knowledge of use and maintenance.

On-site installation: Perform on-site installation according to customer requirements to ensure the stability and safety of the crane.

Final acceptance: Conduct final acceptance of the equipment with the customer to confirm that the equipment meets the contract requirements.

8. After-sales service

Maintenance and maintenance: Provide regular maintenance and maintenance services to ensure the long-term stable operation of the equipment.

Troubleshooting: Provide troubleshooting and technical support to help customers solve problems in use.