500 Ton Mg Double Girder Hoist Gantry Crane

Key Features:

Double girder structure: Provides maximum strength and rigidity for lifting extremely heavy loads.

Trolley hoist system: Travels along the girders and includes powerful hoisting mechanisms for smooth vertical lifting.

Gantry frame: Mounted on ground rails via motorized bogies or wheel assemblies for horizontal movement across large areas.

High lifting height and span: Customizable to meet specific project and site requirements.

Precision control systems: Supports automated and manual operation with safety and overload protection features.

Warranty of core components：1 Year

Core Components：PLC, Engine, Bearing, Gearbox, Motor, Pressure vessel, Gear, Pump

Condition：New

Place of Origin：Henan, China

Warranty：1 Year

Weight (KG)：50000 kg

Feature：Gantry Crane

Lifting Capacity：5-50 Ton

Lifting speed：8.5m/min

Power Supply：3 Phase 380V 50hz

Color：Customer Requirements

Double Main Girders

Two parallel horizontal beams that form the backbone of the crane.

Made of high-strength steel, engineered to bear heavy loads (up to 500 tons).

Designed for high rigidity, minimal deflection, and long spans.

Trolley with Hoisting Mechanism

Mounted on top of the double girders.

Moves laterally across the bridge to position the load.

Includes:

Hoist motor and gearbox

Drum and wire rope system

Hook or spreader beam (depending on application)

Load limiter and anti-sway system

3.Driver's cab:A fixed-cab crane is a vehicle used to lift and move heavy items in and out of loading docks, warehouses, or other areas with limited space. These machines are designed with a cab that extends over the top of a trailer or truck bed, allowing the operator to sit at the controls inside the vehicle.

Hoist:This part controls the vertical lifting and lowering. It is fixed to the trolley component, which allows it to move back and forth across the bridge as needed. Its load capacity depends on its design and construction.

Brake system:Brakes are commonly used in overhead crane systems due to their exceptional stopping power and reliability. These brakes consist of a rotating disc attached to the crane shaft and a stationary brake caliper.

6.Sketch:

 

 

Advantages of a 500-Ton MG Double Girder Hoist Gantry Crane

1. Ultra-Heavy Lifting Capacity

Designed to handle very large and exceptionally heavy loads (up to 500 tons).

Ideal for major infrastructure, shipbuilding, and heavy industrial applications.

2. High Structural Strength and Stability

The double girder design offers superior load distribution and minimized deflection, even under extreme weights.

Enhanced rigidity ensures precise lifting without structural compromise.

3. Wide Span and Customizable Dimensions

Supports long spans and high lifting heights, adaptable to specific site or project needs.

Excellent for large, open workspaces like fabrication yards, shipyards, and assembly plants.

4. Efficient and Precise Load Handling

Trolley and hoist mechanism allows smooth horizontal and vertical movement.

Equipped with VFD control systems for accurate positioning and reduced sway.

5. Long Travel Range with Fixed Rail Operation

Mounted on ground rails for stable, straight-line travel over long distances.

Perfect for applications requiring repetitive, large-scale material movement across defined paths.

6. Improved Safety and Control

Integrated with advanced safety systems, including:

Overload protection

Emergency stop

Limit switches

Anti-collision devices

Wind locks and storm brakes (for outdoor use)

7. Custom Hoisting Solutions

Supports auxiliary hoists, specialized hooks, or spreader beams to meet project-specific lifting needs.

Easily configurable for different types of heavy loads.

8. Reduced Operating Costs Over Time

Compared to multiple smaller cranes or mobile equipment, a single 500-ton gantry crane can perform high-capacity tasks more efficiently and cost-effectively.

Electric operation reduces fuel use and maintenance compared to diesel-powered lifting equipment.

9. Versatility Across Industries

Used in shipyards, hydropower stations, wind turbine manufacturing, bridge construction, and modular fabrication.

 

 

1. Shipbuilding and Marine Engineering

Use: Lifting and assembling ship hull blocks, engines, and large prefabricated modules.

Why: Heavy-duty lifting with long spans and high precision is crucial during ship assembly and maintenance.

⚡ 2. Hydropower and Energy Projects

Use: Handling turbine runners, generator rotors, transformers, and large mechanical parts in power stations.

Why: These projects involve extremely heavy components that require safe and accurate positioning.

🏗️ 3. Bridge and Infrastructure Construction

Use: Lifting precast bridge segments, beams, and concrete components.

Why: High lifting capacity and long travel distances make MG gantry cranes ideal for segmental bridge and viaduct construction.

🏢 4. Heavy Fabrication and Manufacturing Plants

Use: Moving large steel frames, structural components, machinery bases, or modules.

Why: Offers stability and strength for production lines requiring heavy lifting in repetitive operations.

🚆 5. Railway Industry

Use: Lifting rail cars, bogies, and long steel rails during assembly or maintenance operations.

Why: A large-span gantry crane provides efficient handling across rail yards or manufacturing bays.

💨 6. Wind Power Equipment Manufacturing

Use: Transporting and positioning nacelles, tower sections, and rotor blades.

Why: Components are large, heavy, and require precise maneuvering in assembly lines or loading zones.

🏭 7. Steel and Metal Yards

Use: Lifting steel coils, slabs, ingots, and castings.

Why: Gantry cranes handle high-capacity, continuous-duty operations in open yards and indoor bays.

 

 

 

 

 

 

Material Inspection

Quality Inspection: Strict quality inspection is carried out on the purchased raw materials to ensure that they meet the design requirements and national standards.

Material Storage: Qualified materials are stored according to classification to prevent corrosion or damage.

Cutting and Forming

Steel Cutting: Use plasma cutting, laser cutting or flame cutting and other technologies to cut the steel according to the size of the design drawing.

Forming Processing: Form the steel plate through bending, rolling, welding and other processes to manufacture the main beam, end beam and other structural parts.

Welding

Component Welding: The cut and formed steel parts are welded into the main structures such as the main beam, end beam and trolley. The welding process needs to be strictly controlled to ensure the structural strength and welding quality.

Weld Inspection: Use non-destructive testing technology (such as ultrasonic testing, radiographic testing) to inspect the welds to ensure that there are no cracks or other defects.

Machining

Precision Machining: Precision machining is performed on the key components of the crane, such as wheel sets, bearing seats, pulleys, etc., to ensure their dimensional accuracy and surface quality.

Assembly of the whole machine

General assembly: On the basis of pre-assembly, the overall assembly of the crane is carried out, including the final installation of the main beam, end beam, lifting mechanism, walking mechanism, etc.

Commissioning and testing

Under dynamic conditions, the operating performance of the crane is tested, including the testing of lifting, walking, steering and other functions. The overall size of the assembled bridge crane is checked to ensure that all dimensions meet the design requirements.

Spraying and anti-corrosion treatment

Surface treatment Rust removal: Rust removal on the surface of the crane, common methods include sandblasting, pickling, etc. Primer spraying: Spray anti-corrosion primer on the treated surface to prevent metal oxidation and corrosion. Topcoat spraying Color spraying: Spray topcoat according to customer requirements or industry standards to give the crane a protective and decorative effect. Marking: After spraying, mark the crane's identification information in accordance with the specifications, such as model, rated load, etc.

Factory and installation

Packaging and transportation

Packaging protection: Protectively package the key components of the crane to prevent damage during transportation. Transportation arrangement: According to the equipment size and transportation conditions, select a suitable transportation method to transport the crane to the customer's site.

Acceptance and delivery

Customer acceptance

On-site acceptance: The customer conducts on-site acceptance of the crane according to the contract requirements and technical specifications to check the performance and quality of the equipment.

Problem rectification: If any problems are found, the manufacturer needs to rectify them in time to ensure that the equipment fully meets the customer's requirements. Delivery and use Operation training: The manufacturer usually trains the customer's operators to ensure that they can operate the crane correctly and safely.

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