100 Tons Mg Double Girder Trolley Gantry Crane

The 100 tons MG double girder trolley gantry crane is a heavy-duty lifting solution designed for large-scale material handling in industries such as steel, shipbuilding, construction, power plants, and ports. With a robust double-girder structure and rail-mounted design, this crane offers high lifting capacity, stability, and long service life.

Equipped with a trolley hoisting mechanism that runs along the double girders, the crane ensures precise and efficient lifting operations. The MG type structure provides excellent rigidity and adaptability for both indoor and outdoor applications, making it ideal for handling oversized, bulky, and extremely heavy loads.

The crane can be customized with various spans, lifting heights, and working speeds to meet different project requirements. Advanced control systems, such as cabin operation, wireless remote control, or pendant control, ensure safe and user-friendly operation. Safety features like overload protection, limit switches, windproof devices, and anti-collision systems further enhance reliability during heavy-duty operations.

With its 100-ton rated capacity, the MG double girder trolley gantry crane delivers outstanding performance for continuous, large-scale lifting and transporting tasks, ensuring efficiency, safety, and productivity in demanding industrial environments.

 

Core Components：Gearbox, Motor, Gear

Place of Origin：China

Warranty：1 Year

Weight (KG)：10000 kg

Video outgoing-inspection：Provided

Machinery Test Report：Provided

Rated Loading Capacity：50 Ton, 30 Ton, 40 ton, 5 ton, 20 Ton, 10 TON

Max. Lifting Height：30M

 

 

1.Double Girder Main Beam

Heavy-duty welded box structure ensuring high strength and rigidity.

Provides stable support for the trolley hoisting mechanism

1) The main beam of the biggest gantry cranes is typically referred to as the "girder" or "main girder". The girder is the central horizontal beam that supports the crane's load and is typically designed to handle massive weights. In the largest gantry cranes, such as those used in container ports or heavy-lift applications, the main girder can span hundreds of meters in length.

The main beam's construction is usually made from steel or reinforced concrete, depending on the crane's application and the required strength.This beam, often referred to as the "girder," is the primary load-bearing element of the crane and is responsible for supporting the load during lifting operations.

 

3) The main beam is typically made of high-strength steel or sometimes composite materials, depending on the crane's design requirements.The main beam usually includes reinforced sections or box girders to handle the heavy loads and resist bending or twisting under the forces during operation.The beam houses the crane's trolley, which moves along its length to carry the load (often containers or heavy equipment).

Trolley Hoisting Mechanism

Mounted on the girders, includes the main hoist and auxiliary hoist.

Features heavy-duty wire rope hoist or winch system for precise lifting.

Equipped with motors, reducers, and brakes for smooth and reliable operation.

Motor: The motor of the lifting system in a gantry crane is typically an electric motor that drives the winch or hoist mechanism responsible for lifting and lowering the load. The motor needs to be powerful enough to handle heavy loads, with torque and speed settings optimized for the specific crane's lifting capacity.

2) Reducer: The reducer in the lifting system of a gantry crane, particularly in the largest models, is a critical component for controlling the speed and torque of the crane's hoisting mechanism. It is part of the gearbox system, which helps in converting the high-speed rotation of the motor into the desired lower speed with increased torque needed for lifting heavy loads.

3) Drum: The drum holds and stores the wire rope or cable that is used by the gantry crane to lift and lower heavy loads. The rope is wound around the drum as the crane moves, allowing the hoist mechanism to raise or lower the load as required.The drum is driven by a motor or gearbox, which applies torque to the drum to wind or unwind the rope, depending on the direction of movement.The drum is typically made of high-strength steel to withstand the heavy loads and stresses involved in lifting large weights.

4) Wire rope: Wire ropes are typically made from high-strength steel alloys, such as carbon steel, stainless steel, or alloy steel, depending on the operating environment and load requirements.The strength of the wire rope is vital for handling heavy loads safely.

5) Pulley block:The pulley block is designed to reduce the amount of force required to lift heavy loads by using a system of pulleys (sheaves) and cables (or ropes).It transfers the lifting force from the crane's hoist mechanism to the load, increasing mechanical advantage through the use of multiple pulleys.

6) Lifting device: The lifting device in the lifting system of the largest gantry cranes is typically a hook block or a lifting beam, depending on the specific design of the crane.

3.End Carriages

Connect the girders to the crane legs.

Integrated with driving motors, wheels, and gearboxes to ensure stable traveling on rails.

1) The end carriage of the largest gantry cranes, often used in ports or heavy-duty industrial settings, is a critical component that supports the crane's main structure and facilitates its movement along rails. The size and design of the end carriage vary depending on the crane's load capacity, size, and intended application.

2) The design ensures the weight of the crane and its loads are evenly distributed across the rails and foundation.Typically, end carriages are made from high-strength steel, designed to withstand heavy loads and dynamic forces.The end carriages are usually equipped with electric motors, gearboxes, and rail wheel systems to allow smooth and controlled movement along the rails.

3) The end carriages typically support massive weights-some can lift container loads up to 65 tons per movement, and even more with specialized equipment. These end carriages can weigh hundreds of tons themselves, depending on the overall crane size and lifting capacity.

4.Crane travelling mechanism

1) Working principle

The crane traveling mechanism of a gantry crane is responsible for the horizontal movement of the crane along a defined path, typically on rails or tracks. This movement allows the crane to cover a large area to lift and move loads.

2) Functions of the crane operating mechanism

Horizontal movement: The traveling mechanism enables the gantry crane to move along a rail system, typically positioned on the ground or elevated tracks. This allows the crane to cover a wide area, such as a yard, warehouse, or construction site.

Load distribution: The traveling mechanism works in conjunction with the hoisting system and the gantry structure to support the load during lifting and movement. By traversing the rails, the crane positions itself to pick up and transport loads to specific locations.

Positioning accuracy: It facilitates precise positioning of the crane for accurate material handling. The traveling mechanism ensures the crane reaches the designated working locations, such as storage areas, ship holds, or container yards, for material pickup or delivery.

5.Trolley travelling mechanism

1) Structural composition

The trolley travelling mechanism in the biggest gantry cranes combines a series of high-strength steel components for structural integrity, advanced motor and gearbox systems for movement, and intricate safety systems to ensure precise and safe operation.

2) Function of the trolley operating mechanism

Horizontal Movement of the Trolley:The trolley moves back and forth along the length of the crane bridge. This allows the load to be positioned over various parts of the work area.It ensures that the crane can cover a wide span, enabling the lifting and transportation of materials across the designated work area.

Load Transport:The trolley is equipped with a hoisting mechanism (hook, clamp, or other lifting devices), which can pick up, move, and release loads. The traveling function enables the crane operator to precisely move loads over a specified path.

Load Transport:The trolley is equipped with a hoisting mechanism (hook, clamp, or other lifting devices), which can pick up, move, and release loads. The traveling function enables the crane operator to precisely move loads over a specified path.

6.Crane wheel

1) Function of wheels

Mobile support: The main function of the wheels is to support the movement of the crane on the track and ensure the smooth operation of the crane.

Load distribution: The wheels help to evenly distribute the load of the crane, reduce the pressure on the track, and increase the service life of the equipment.

2) Design requirements

Strength and rigidity: The wheels must have sufficient strength and rigidity to withstand the dead weight of the crane and various dynamic loads.

Wear resistance: Due to the continuous friction between the wheels and the track, the wheel material must have good wear resistance to extend the service life.

Anti-skid design: The wheel surface should be designed to be anti-skid to avoid sliding or slipping under heavy load.

7.Crane Hook

The crane hook of the largest gantry cranes is typically a heavy-duty, robust piece of equipment designed to handle extremely high lifting capacities. These cranes, used in large-scale industrial applications such as shipyards, ports, and construction sites, have hooks that can handle loads often exceeding several hundred tons.

Crane hooks are usually made from high-strength alloy steel to withstand the immense stresses from heavy loads. The hook may be forged to ensure toughness and reliability.The hook on a giant gantry crane can be very large, often weighing several tons itself, depending on the lifting capacity of the crane. For instance, cranes with lifting capacities in the range of 1,000 tons or more might have hooks that weigh several tons as well.The design may vary, but common types include single, double, or triple hook configurations, especially for larger cranes. Double or triple hooks can help distribute the load more evenly, which is particularly important when lifting very large or awkwardly shaped items.

Large gantry cranes are equipped with safety mechanisms to prevent hook damage and accidents. This includes features like automatic overload protection, anti-sway systems, and emergency brakes.On larger cranes, hooks often come with different types of rigging attachments (e.g., lifting slings, spreader bars) to facilitate safe and efficient load handling.

Motor

1) The motor system of such a massive crane would involve highly specialized motors capable of handling immense loads with precision. The crane's hoisting system would likely use several DC motors or AC motors with variable frequency drives (VFDs) for smooth and efficient control. The motors would be linked to a complex system of winches, pulleys, and lifting mechanisms to lift and move extremely heavy loads.

2) The crane is powered by a combination of electric motors for the lifting mechanism and hydraulic motors for certain parts of the crane, such as the trolley or the slewing mechanism. Specific details on the exact type and power of the motors aren't usually publicly available, but such a crane would require motors with several megawatts of power to perform its heavy-duty tasks effectively.

3) The crane is also equipped with sophisticated safety features and control systems to ensure stability and prevent overloads during operation.

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Sound and light alarm system & limit switch

1) Sound and light alarm system

The audible alarm is used to alert personnel of critical conditions, such as an overload, malfunction, or unsafe operation.Continuous Alarm is typically used for emergency situations like a malfunction or overload condition.Intermittent Beeps may be used for warnings (e.g., when a limit is approaching, such as a crane nearing its maximum load or operating range).A louder sound that may be employed to indicate an emergency or during high-risk operations.The alarm system should be loud enough to be heard above the noise of the crane's operation and from a distance, considering the size of the crane and the surrounding environment.

Visual Indicators (Lights): The visual light system serves as a secondary alert, helping workers who may be in areas where the sound alarm cannot be heard (e.g., in loud environments, or when they are visually monitoring crane operations). Flashing lights may be used to attract attention in emergency situations or to indicate an ongoing hazard.These lights are usually mounted on the crane's main structure and the gantry, visible from all directions where people might be working. The lights may also be installed at key control panels or ground-based operational stations.

Red Lights: Indicate critical failure, emergency, or unsafe conditions, such as crane overload or mechanical failure.

Yellow/Amber Lights: Warn of non-critical issues or impending danger, like approaching operational limits.

Green Lights: Indicate normal operation or that the crane is operating within safe parameters.

2) Limit switch

A limit switch on such a gantry crane plays a crucial role in safety and operational control. It is a mechanical or electronic device used to define the travel limits of the crane's movement. Limit switches are typically installed on the crane's trolley or gantry structure to prevent over-travel, which could cause mechanical damage or dangerous situations. They ensure that the crane does not move beyond its safe operating range in horizontal, vertical, or rotational directions.

Horizontal (longitudinal) travel limit switches – These prevent the crane from moving too far along the dock or construction site.

Vertical (hoisting) limit switches – These prevent the hook or lifting mechanism from traveling beyond its designed upper or lower limits.

Lateral (trolley or gantry) limit switches – These help prevent the trolley or gantry structure from moving out of its designated track or path.

Rotational limit switches – In cases where the crane has a rotating boom or arm, rotational limit switches help avoid over-rotation.

10.Safety Devices

1) Overload protection device: Overload Limiters: These devices monitor the load being lifted. If the crane exceeds its rated lifting capacity, the system will automatically stop operation or issue an alert.Continuously checks the load and boom angle, ensuring the crane does not exceed safe lifting conditions.

2) Anti-Sway Systems: Reduces the swinging motion of the load to prevent accidents or loss of control, especially when moving heavy or suspended loads.Some cranes use automated systems that control the speed of the crane or implement counterweights to manage the sway of the load.

3) Collision Prevention Systems: Prevent the crane from moving beyond safe limits. These switches stop the crane if it reaches dangerous positions (e.g., near another crane or an obstacle). Detect objects or personnel near the crane and prevent movement in hazardous areas.

4) Emergency Stop Systems: Strategically located emergency stop buttons can immediately halt crane operations in case of an emergency.Some large gantry cranes are equipped with a remote emergency shutdown feature to allow operators to stop the crane from a distance if needed.

5) Crane Monitoring Systems: Video surveillance cameras mounted on the crane or its operator cabin provide visibility of blind spots and ensure safe operations.These systems provide real-time data on crane performance, diagnostics, and usage. Operators and maintenance teams can monitor crane status remotely.

6) Wind and Weather Sensors: Detects wind speed to ensure that the crane doesn't operate in hazardous weather conditions, such as high winds.Detect adverse conditions (e.g., lightning, heavy rain, extreme temperatures) and may restrict crane movement if dangerous weather is detected.

11.Control Mode

1) Manual Control via Joysticks or Consoles: Operators can use sophisticated control panels to maneuver the crane. This may involve controlling the main hoist, the trolley, the gantry's lateral movement, and rotation of the crane.

2) Automated Systems: Some modern gantry cranes are equipped with automation and AI-based control systems to optimize efficiency, safety, and reduce human error. These systems can assist in performing repetitive tasks, positioning containers, or adjusting crane speeds based on cargo weight and environmental factors.

3) Remote Control: Many of the largest cranes are equipped with remote control systems, allowing operators to control the crane from a distance, often in a cab or even from a control room. This gives them a better view of the task and allows for safer operations in challenging environments.

4) Safety Systems: These cranes also feature robust safety systems to prevent accidents. These may include load sensors, anti-collision technology, and emergency stop mechanisms.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12.Sketch

 

Main technical

 

 

Advantages of 100 Tons MG Double Girder Trolley Gantry Crane

High Lifting Capacity

With a rated capacity of 100 tons, the crane is ideal for handling oversized and extremely heavy loads with stability and safety.

Robust Double Girder Structure

The box-type double girder ensures excellent strength, rigidity, and durability, suitable for long spans and heavy-duty applications.

Efficient Trolley Hoisting Mechanism

The trolley design allows smooth movement along the girders, enabling precise positioning and efficient handling of bulky materials.

Stable Rail-Mounted Operation

Equipped with heavy-duty wheels and drive systems, ensuring smooth and reliable traveling along ground tracks even under full load.

Flexible Operation Modes

Offers multiple control options: cabin operation, pendant control, or wireless remote control, allowing operators to choose the safest and most convenient mode.

Comprehensive Safety Features

Includes overload protection, limit switches, emergency stop systems, anti-collision devices, and windproof rail clamps for safe operations in demanding environments.

Customizable Design

Available in different spans, lifting heights, and working speeds to meet diverse project and industry requirements.

Durability in Harsh Environments

Designed with corrosion-resistant materials, protective coatings, and windproof devices, making it suitable for outdoor use in shipyards, steel plants, and construction sites.

Reduced Maintenance Needs

High-quality motors, gearboxes, and electrical systems extend service life while minimizing downtime and maintenance costs.

Enhanced Productivity

Capable of continuous heavy-duty operation, ensuring efficient material handling and improving workflow in large-scale industrial projects.

 

 

Applications of 100 Tons MG Double Girder Trolley Gantry Crane

Shipbuilding Industry

Handling large ship components, steel plates, and heavy blocks during ship assembly and repair.

Steel and Metallurgy Plants

Lifting and transporting heavy steel coils, billets, slabs, and casting products.

Construction and Infrastructure Projects

Moving oversized precast concrete segments, bridge beams, and heavy construction materials.

Power Plants

Installing and maintaining large turbines, generators, and other heavy equipment.

Railway and Highway Projects

Used for lifting and placing railway tracks, highway girders, and bridge construction elements.

Ports and Logistics Yards

Loading, unloading, and stacking heavy cargo, containers, and machinery in port terminals.

Mining and Heavy Machinery

Transporting oversized mining equipment, crushers, and large mechanical parts.

Aerospace and Heavy Engineering

Handling large aerospace components and heavy-duty industrial machinery with precision.

 

 

1. Design Phase: A team of engineers drafts the initial design, considering the required lifting capacity, dimensions, environmental factors (wind, seismic activity), and operational needs (speed, controls).The crane's frame is designed to support massive loads. This involves calculations for strength and stability, including stress tests to ensure safety.High-strength steel and alloys are selected for various crane components, such as beams, legs, and the gantry structure. Corrosion-resistant materials may also be chosen for parts exposed to harsh environments.

2. Component Fabrication: The gantry frame, which includes the legs, cross beams, and the top structure, is fabricated. This involves cutting, welding, and assembling steel sections.The legs, which are the primary load-bearing components, are fabricated as large vertical structures and then welded and reinforced.The crane's wheels or tracks are manufactured, allowing the gantry to move along the rails or ground track system. This is critical for positioning the crane for different operations.

3. Jacking and Assembly of the Main Frame: Large sections of the gantry crane are often built in a modular fashion, meaning various components are fabricated in different locations and then assembled at the site.For the assembly of the largest components, specialized equipment like jacks, cranes, and forklifts are used to lift and position individual pieces.Assembling the gantry structure requires precise alignment of each section. This often involves using advanced laser-guided systems to ensure everything is in place.

4. Installation of Hoisting System: This includes the main hoist, which is responsible for lifting loads. The hoist may have a series of pulleys, winches, and cables that need to be installed and tested.The crane requires a powerful motor to lift and lower heavy loads. This motor, often an electric or hydraulic system, is integrated into the hoist assembly and connected to the control system.

5. Electrical and Control Systems: The crane's electrical systems are installed, including sensors, safety features, and control systems. These include anti-collision systems, load sensors, and the software used to operate the crane remotely.Extensive testing is done to ensure the crane can be operated safely, with precision, and without errors. This includes testing for load balancing, movement control, and emergency shutdown systems.

6. Testing and Calibration: The crane undergoes rigorous load tests to ensure it can handle the maximum weight it's designed for. This includes static tests (no movement) and dynamic tests (moving with a load).The crane's movement, including its speed, lifting capacity, and range of motion, is tested under real-world conditions. This ensures the crane operates as intended.Extensive safety inspections are performed to verify compliance with international standards for heavy lifting and industrial operations.

7. Final Assembly and Commissioning: Once all systems are tested and fully functional, the crane is completed and prepared for commissioning.If the crane was partially constructed elsewhere, the final assembly might take place on-site, where the crane is moved to its designated operational area.Operators and maintenance staff are trained in the operation of the gantry crane, which includes safety procedures, operational protocols, and routine maintenance tasks.

8. Operational Use and Maintenance: The crane will undergo periodic inspections and maintenance to ensure its continued functionality and safety. This includes checking for wear and tear on critical components like cables, motors, and hoists.Over time, the crane may undergo upgrades or modifications to improve its efficiency, safety, or lifting capacity.

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%.