Double Girder Bridge Mobile Overhead Crane 80 Ton With Hoist

A Double Girder Bridge Mobile Overhead Crane 80 Ton with Hoist is a heavy-duty lifting solution designed for industrial applications requiring high capacity, precision, and durability. Here's a detailed breakdown of its key features, components, and applications:

Key Features:

Lifting Capacity:

Rated for 80 metric tons  suitable for heavy loads in factories, steel plants, warehouses, and shipyards.

Double Girder Design:

Two robust bridge girders provide superior strength and stability compared to single-girder cranes, enabling higher capacities and longer spans.

Span & Coverage:

Customizable span (typically 10–35 meters) to fit workshop or facility dimensions.

Lifting Height:

Adjustable (usually 6–30 meters), depending on hoist type and building structure.

Hoisting Mechanism:

Electric wire rope hoist (e.g., 35/10 ton double hoist for main + auxiliary lifting) or chain hoist options.

Slow-speed precision lifting for delicate operations.

Traveling:

Crane Travel: Motorized movement along runway rails (longitudinal).

Trolley Travel: Cross-movement along girders (transverse).

Control: Pendant (push-button) or radio remote control; optional cabin operation.

Duty Class:

FEM/ISO standards (e.g., FEM 1Am–2m, ISO M4–M6) for moderate to heavy usage.

Safety Features:

Overload limit switch, emergency stop, anti-collision system, and overload protection.

Insulated options for hazardous environments (e.g., steel mills).

Core Components：Bearing, Gearbox, Motor, Pump

Place of Origin：Henan, China

Warranty：1 Year

Weight (KG)：2000 kg

Video outgoing-inspection：Provided

Machinery Test Report：Provided

Design：Double beam

Effectiveness：high efficiency

Operating speed：High speed operation

Stability：Anti-swing function

Color：Optional

Power Source：110V/220V/230V/380V/440V,customized

Span：7.5-31.5m

Here's a detailed technical specification of all major components in a double girder overhead crane system with hook:

1. Bridge Structure

Main Girders (2) – Primary load-bearing beams that span the width of the bay.

End Trucks (2) – Houses wheels and connects girders to runway beams.

Cross Connection (Diaphragm) – Provides lateral stability between girders.

2. Hoisting Mechanism

Hoist Motor – Powers the lifting operation (typically AC or DC).

Wire Rope/Drum or Chain Hoist – Lifting medium (usually wire rope for 35-ton capacity).

Hook Block – Equipped with a heavy-duty hook for load attachment.

Braking System – Ensures safe load control (disc or drum brakes).

3. Trolley Assembly

Trolley Frame – Moves along the bridge girders.

Trolley Motor & Drive – Powers horizontal movement.

Wheels & Rail – Guides trolley movement on girders.

4. Runway System

Runway Beams – Supports the crane (mounted on building columns or freestanding).

Runway Rails – Provides a smooth path for crane movement.

End Stops & Buffers – Prevents overtravel.

5. Electrical System

Control Panel – Houses contactors, PLCs, and overload protection.

Operator Controls – Pendant station, radio remote, or cabin control.

Festoon/Cable Reel System – Manages power and signal cables.

6. Safety Components

Limit Switches – Prevents over-hoisting or over-travel.

Overload Protection – Load cell or torque limiter.

Emergency Stop (E-Stop) – Immediate shutdown.

Anti-Collision System (if multiple cranes operate in same bay).

7. Optional Features

Cabin (Operator Cab) – For seated control.

Magnetic or Grab Attachments – For specialized loads.

Variable Frequency Drives (VFDs) – Smooth acceleration/deceleration.

Technical Specifications Table

Sketch

Main technical

A Double Girder Bridge Mobile Overhead Crane 80 Ton with Hoist is a heavy-duty lifting solution widely used in industries like steel, construction, shipping, and manufacturing. Here are its key advantages:

1. Higher Load Capacity

Designed to handle heavy loads up to 35 tons (and beyond with customization).

More stable than single-girder cranes for extreme weights.

2. Greater Span & Coverage

Double girders provide better structural integrity, allowing longer spans (up to 30m+).

Ideal for large workshops, warehouses, and outdoor applications.

3. Enhanced Lifting Height

The double-girder design allows more hook height compared to single-girder cranes.

Suitable for tall buildings or deep lifting needs (e.g., steel mills, shipyards).

4. Improved Stability & Durability

Twin girders distribute weight evenly, reducing deflection and sway.

Robust construction ensures longer service life, even in harsh environments.

5. Smooth & Precise Operation

Equipped with high-performance hoists (wire rope or chain).

Advanced controls (VFD drives) enable smooth acceleration/deceleration, minimizing load swing.

6. Flexible Customization

Can be fitted with auxiliary hoists (for dual lifting).

Options like cabin control, remote operation, or automation for specialized needs.

7. Safety Features

Includes overload protection, limit switches, emergency stop, and anti-collision systems.

Complies with international standards (ISO, FEM, DIN, CMAA).

8. Low Maintenance

High-quality components reduce wear and tear.

Easy access for inspections and repairs.

9. Wide Application

Used in steel plants, ports, power stations, aerospace, and heavy machinery industries.

Common Applications:

Steel & Metal Industry – Handling coils, sheets, and heavy molds.

Power Plants – Moving turbines, generators, and large equipment.

Shipbuilding & Ports – Lifting heavy ship parts and containers.

Mining & Heavy Machinery – Transporting large mining equipment.

Automotive Manufacturing – Handling presses, dies, and large assemblies.

Construction & Cement Plants – Moving pre-cast concrete segments and raw materials.

Producing a Double Girder Bridge Mobile Overhead Crane 80 Ton with Hoist involves several stages, from design and material procurement to manufacturing, assembly, testing, and delivery. Below is an overview of the production process:

1. Design & Engineering

Load & Span Calculation: Determine crane span (distance between rails), lifting height, and duty class (FEM/ISO standard).

Structural Design: CAD modeling for main girders, end carriages, hoist, and trolley.

Electrical & Control System: Motor power, frequency inverter selection, and safety systems (limit switches, overload protection).

Compliance Check: Ensure adherence to ISO, FEM, ASME, or CMAA standards.

2. Material Procurement

Main Girders: Fabricated from high-quality steel (Q235B/Q345B) for strength and durability.

End Carriages: Reinforced steel with wheels, drive motors, and buffers.

Hoist & Trolley:

Hoist: 35-ton capacity with wire rope or chain, gearbox, and brake system.

Trolley: Includes motorized travel mechanism.

Electrical Components: Motors, control panels, pendant/radio remote, and festoon/cable reeling system.

3. Manufacturing Process

A. Main Girder Fabrication

Cutting & Welding: CNC plasma cutting for precision; automatic submerged arc welding (SAW) for strength.

Shot Blasting & Painting: Anti-rust treatment with primer and topcoat (usually epoxy paint).

B. End Carriage Assembly

Wheel & Rail Alignment: Precision machining for smooth travel.

Drive Mechanism: Mounting of motors, gearboxes, and brakes.

C. Hoist & Trolley Assembly

Gearbox & Motor: Mounted with proper torque calibration.

Brake System: Fail-safe disc or drum brakes.

D. Electrical System Integration

Control Panel: Includes PLC, contactors, and overload protection.

Wiring & Sensors: Limit switches, overload sensors, and emergency stop.

4. Quality Control & Testing

Dimensional Inspection: Verify girder straightness, wheel alignment.

Load Testing (per ISO 4310):

Static Test: 1.25 × SWL (43.75 tons).

Dynamic Test: 1.1 × SWL (38.5 tons) with functional checks.

Electrical Safety Test: Insulation resistance, emergency stop function.

5. Packaging & Delivery

Disassembly (if needed): For easier shipping.

Packaging: Waterproof wrapping for sea freight.

Documentation: Manuals, test reports, and certifications (CE, ISO, etc.).

6. Installation & Commissioning

On-Site Assembly: Re-erection of girders, hoist, and electrical connections.

Final Testing: Operational checks under load.

Training: Operator and maintenance training.

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%.