MG Double Girder Gantry Crane

 

MG Double girder gantry crane are available in a variety of sizes and configurations to meet different lifting requirements. They can be designed with adjustable height levels, rubber or steel wheels for mobility, and different types of power sources, such as diesel, electricity, or manual power.

 

Place of Origin:Henan, China

Warranty:2 years

Weight (KG):80000 kg

Video outgoing-inspection:Provided

Machinery Test Report:Provided

Application:warehouses,factory and other place

Crane type:box type gantry crane

Travelling speed:20m/min

Lifting mechanism:Electric Hoist

Control method:Ground Control+ Remote Control (customized)

Working duty:A5

Working Temperature:-20~+40℃

Industrial voltage:380V50HZ3Phanse or other

Packing:According to client request

Control method: Ground Control, Remote Control (customized)

Power supply: 3 Phase 380V 50hz/Custmized

 

 

1.Main beam

1. The main beam is usuallymade of steel or welded boxsections.
2. The main beam carries thetrolley and hoisting system,which moves along its length.
3. The main beam is designed tolimit deflection to a safe range toensure smooth operation of thecrane.
Electric Motor Driven:
The crane's movement is powered by an electric motor, which provides smooth and efficient operation.
The electric motor typically drives the trolley and hoist, allowing the crane to lift, lower, and move loads along the beam.

2.Lifting System

These components are responsible for lifting, moving, and positioning containers.

Trolley:

Moves along the main girder to position the spreader over the container.

Equipped with motors for horizontal movement.

Hoist Mechanism:

Includes the winch, wire ropes, and drums for lifting and lowering containers.

Designed for precise control and smooth operation.

Spreader:

A specialized lifting device that attaches to the top of a container.

Can handle different container sizes (20ft, 40ft, 45ft, etc.).

May include twist locks to securely grip the container.

Ropes and Pulleys:

High-strength steel wires and pulleys are used to lift and lower loads.

Regularly inspected for wear and tear.

3.Mobility Components

These enable the crane to move within the terminal or yard.

Wheels (for RTG Cranes):

Rubber-tired wheels allow the crane to move freely in the container yard.

Equipped with steering mechanisms for maneuverability.

Rail System (for RMG Cranes):

Fixed rails guide the crane's movement.

Provides stability and precision for high-volume operations.

Drive Motors:

Electric or hydraulic motors power the movement of the crane.

Equipped with brakes for safe stopping.

                                         

4.Power and Control Systems

These components ensure the crane operates efficiently and safely.

Electric Panels and Cabinets:

House the electrical components, including transformers, circuit breakers, and control systems.

Control Cabin:

The operator's station, equipped with joysticks, monitors, and control panels.

Provides a clear view of the operating area.

Automation Systems (Optional):

Advanced cranes may include automated control systems for unmanned operation.

Uses sensors, cameras, and software for precise container handling.

Power Supply:

Diesel generators (for RTG cranes) or electrified rails (for RMG cranes) provide power.

Some cranes use hybrid or battery-powered systems for energy efficiency.

 

5.Safety Components

These ensure safe operation and protect both the equipment and personnel.

Anti-Collision Systems:

Sensors and software to prevent collisions with other cranes, containers, or obstacles.

Overload Protection:

Prevents the crane from lifting loads beyond its rated capacity.

Limit Switches:

Automatically stops the crane at the end of its travel range.

Emergency Stop Buttons:

Installed at key locations for immediate shutdown in case of an emergency.

Wind Sensors:

Monitor wind speed and alert operators or shut down the crane in high winds.

Lighting and Alarms:

Warning lights and alarms to alert personnel during crane operation.

 

6.Crane wheel

1)Wheel Design and Structure
Wheel Diameter: The size and diameter of the wheels depend on the crane's design and the type of track system it operates on. Larger wheels can support higher load capacities, but they also require sturdier rails and track systems.
2)Wheel Material:
Most crane wheels are made from high-quality steel or alloy steel, providing strength and durability for handling heavy loads and resisting wear from prolonged use.
Rubber-coated wheels can be used for quieter operations or for cranes that are operating in environments where noise reduction is important.
Special alloy or hardened steel is often used for heavy-duty applications, such as lifting heavy materials in shipyards, ports, or steel mills.
3)Wheel Axle and Bearings
The wheels are mounted on axles, which are shafts that rotate along with the wheels. These axles transfer the torque from the motor and gearbox to the wheels.
Bearings: High-performance roller bearings or ball bearings are mounted on the axles to reduce friction and ensure smooth rotation of the wheels. Properly maintained bearings ensure minimal wear, which extends the lifespan of the crane's wheel system.

7.Crane Hook

1. The hook is usually made ofhigh-strength steel or alloymaterial

2. The hook is designed in acurved or C-shaped shape tofix the sling, chain or loadlifting attachment.

3. The hook is connected to thehoist drum or wire ropethrough a hook pulley or fixedsuspension device.

8.Motor

1. The motor must be sized tohandle the maximum load thatthe crane will lif.

2. The motor may be equippedwith forced ventilation ornatural cooling to preventoverheating during longperiods of operation.

3. The motor has different ratedvoltage levels depending onthe design requirements

.

Sound and light alarm system & limit switch

1)Sound and Light Alarm System
The sound and light alarm system is designed to alert operators and personnel to various crane operating conditions, such as the crane moving, the load being lifted or lowered, or an emergency situation. It can be integrated into the crane control system for real-time feedback.
2)Limit Switch System
A limit switch is an essential safety feature in a gantry crane. It prevents the crane from exceeding its designated operational limits, helping to protect the crane structure, motor, and load. Limit switches automatically stop or reverse the crane's movements once it reaches predefined limits.

10.Safety Devices

1)Overload Protection System
The overload protection system is one of the most critical safety devices for a gantry crane. It ensures that the crane does not lift loads exceeding its designed capacity, preventing potential damage to the crane and ensuring safe lifting operations.
2)Anti-Collision System
The anti-collision system prevents the gantry crane from colliding with other cranes, structures, or equipment. This is particularly important in areas with multiple cranes or dense operation spaces.
3)Emergency Stop System
The emergency stop system is essential for immediately halting the crane's operation in case of an emergency. This system helps prevent accidents or damage by quickly stopping the crane when necessary.
4)Limit Switches
Limit switches are crucial for preventing the crane from exceeding its safe operational limits. They stop the crane from moving beyond a specific range, thus avoiding damage to the crane, equipment, or structure.
5)Safety Locking Mechanism
A safety locking mechanism is used to prevent accidental movement of the crane or its components, especially during maintenance or when the crane is idle.

11.Control Mode

1)Manual Control Mode
This is the most basic and widely used control mode for gantry cranes, where the operator has full control over all crane movements using control buttons, joysticks, or levers.
2)Wireless Remote Control Mode
This mode enables the operator to control the crane from a distance, improving safety by allowing the operator to avoid hazardous areas or work in more convenient locations.
3)Cab Control Mode
In this mode, the operator controls the crane from a fixed cabin located on the crane itself. This mode is common for large gantry cranes operating in harsh environments, such as ports or shipyards.
4)Automated or Semi-Automated Control Mode
This control mode involves the automation of certain crane functions, reducing the need for manual intervention. The level of automation can range from semi-automatic (operator intervention is still required) to fully automatic (no human involvement in routine operations).
5)Dual Control Mode (Manual + Automatic)
In this hybrid mode, the crane can be operated manually or automatically depending on the situation, giving operators the flexibility to switch between control methods.

Sketch

Main technical

 

Advantages of MG double girder gantry crane

Stability and reliability:

MG double girder gantry crane adopt a double-girder structure. This design provides greater stability and balance, ensuring good mechanical stability when lifting and moving heavy objects. Compared with single-girder cranes, the double-girder structure can withstand larger lifting loads while reducing structural stress and wear caused by uneven loads.

Efficient lifting capacity:

MG double girder gantry crane are designed with optimized lifting mechanisms and are usually equipped with electric hoists. These hoists are characterized by high efficiency and quick response. This means that when performing lifting tasks, the crane can quickly raise or lower the load and position it accurately, thereby improving overall work efficiency.

Flexibility and adaptability:

MG double girder gantry crane can be customized according to different industrial applications, such as track span, lifting height and load capacity can be adjusted according to actual needs. This ability to customize allows it to adapt to a variety of work environments, such as factory floors, warehouses, docks and even outdoor job sites.

Environmental protection and energy saving:

The MG double girder gantry crane pays more attention to environmental protection and energy saving when designing, using high-efficiency motors and energy recovery systems to reduce energy consumption and operating costs. These environmentally friendly designs not only reduce the company's operating expenses, but also meet the requirements of modern industrial production for sustainable development.

 

Applications of MG double girder gantry crane

MG double girder gantry crane are utilized in a wide range of industries and applications where heavy loads need to be lifted and moved. Some of the common applications of double beam gantry cranes include:

 

1. Manufacturing industry:

MG double girder gantry crane are extensively used in the manufacturing industry to move heavy components and products around the factory. They are commonly used for lifting and transporting large machinery, equipment, and raw materials.

 

2. Construction industry:

MG double girder gantry crane are used in construction projects to assist with the lifting and moving of heavy materials such as steel beams, large concrete blocks, and construction equipment.

 

3. Ports and shipyards:

MG double girder gantry crane are commonly used in ports and shipyards to move containers and cargo on and off ships. Double beam gantry cranes are particularly useful for handling oversized and heavy cargo.

 

4. Warehouses and logistics:

MG double girder gantry crane are used to move and stack heavy loads in warehouses, logistics centers, and distribution hubs. These cranes are particularly useful for handling large pallets of goods.

 

5. Mining industry:

MG double girder gantry crane are commonly used in the mining industry to assist with the movement of heavy machinery and equipment, as well as transporting extracted minerals from one location to another.

 

6. Power plants:

MG double girder gantry crane are essential for the installation and maintenance of equipment in power plants that are typically large and heavy.

 

7. Aerospace industry:

MG double girder gantry crane are used in the aerospace industry to lift and move aircraft components such as engines, wings, and fuselage.

 

Overall, double beam gantry cranes are an essential tool for industries that require the lifting and moving of heavy loads across various locations.

 

1. Requirement Analysis & Technical Design
Client Consultation: Understand the customer's specific needs (load capacity, span, lifting height, working environment, control system, safety features).
Site Assessment: Evaluate the installation site, environmental conditions, and any special constraints.
Engineering Design:
Develop detailed 3D CAD drawings and structural calculations for the girder, end carriages, trolley, hoist, and electric systems.
Customize components such as motors, brakes, control panels, and safety devices based on project specifications.
Ensure compliance with international standards (ISO, FEM, CMAA, etc.).
2. Material Procurement
Steel Structure Materials: Source high-quality steel plates, beams, and profiles (Q235B/Q355B or equivalent) for the girder and frame.
Electrical & Mechanical Components: Purchase motors, gearboxes, brakes, hoists, control panels, limit switches, cables, and other electrical components from approved suppliers.
Specialty Items: Order additional customized parts (e.g., explosion-proof motors, stainless steel components, or corrosion-resistant finishes if needed).
3. Steel Structure Fabrication
Cutting: Use CNC cutting machines or laser cutters to process steel plates and profiles according to design specifications.
Beveling: Perform edge preparation for welding using beveling machines.
Welding:
Weld the main girder, end carriages, and other structural components according to certified welding procedures.
Conduct weld inspections (visual inspection, ultrasonic or X-ray testing if required).
Straightening: Use hydraulic presses to ensure the girder and frame are straight and dimensionally accurate.
Machining: Machine key connection points (e.g., wheel bases, trolley rails) for precise assembly.
4. Surface Treatment
Sandblasting/Shot Blasting: Remove rust, scale, and surface impurities from the steel structure to achieve SA2.5 or better surface grade.
Painting/Coating:
Apply primer and finishing coats based on the environmental working conditions (e.g., marine-grade paint for outdoor cranes).
Optional: Apply anti-corrosion, anti-static, or explosion-proof coatings depending on the client's requirements.
5. Component Assembly
Hoist & Trolley Assembly:
Assemble the electric hoist and trolley system, including motors, gear reducers, wire ropes or chains, and hook blocks.
Pre-install limit switches, brakes, and cable reels.
End Carriage Assembly:
Install traveling wheels, bearings, buffers, and drives onto the end carriages.
Electrical Wiring:
Pre-wire key components (e.g., hoist motor, trolley motor) in accordance with the electrical layout.
Install control systems, power supply cables, festoon systems, or cable carriers.
6. Pre-Assembly & Trial Fitting
Pre-assemble the girder, end carriages, hoist, trolley, and electrical system at the factory to ensure proper fit and alignment.
Conduct tolerance checks on critical dimensions (e.g., span, wheelbase, and diagonal measurements).
7. Factory Testing (Pre-Delivery Inspection)
Mechanical Testing: Perform no-load and partial-load tests on hoisting, trolley travel, and crane travel systems to verify smooth and reliable operation.
Electrical Testing: Verify proper functioning of motors, control panels, limit switches, alarms, and safety devices.
Safety Inspection:
Overload protection testing.
Emergency stop and brake system verification.
Check for proper function of sound and light alarms.
Note: A third-party inspection can be arranged if required by the client.
8. Disassembly & Packaging
Disassemble major components (girder, trolley, hoist, end carriages) for transport.
Protect all surfaces with anti-corrosion oil or protective wraps.
Use reinforced wooden crates or steel frames for sensitive components like motors, control systems, and electrical parts.
9. Delivery & Logistics
Organize transportation (by truck, rail, or sea) to the customer's site.
Provide detailed installation manuals, electrical diagrams, and operation guides along with the shipment.

Workshop view:

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 85%.