Premium Double Beam Overhead And Bridge Crane

Why Choose This Crane?

✔ Best for steel-heavy industries – Maximizes productivity in metal handling.
✔ Reduces labor costs – Minimizes manual rigging work.
✔ Enhances workplace safety – No loose chains or slings.

 

Key Features & Components

1. Double Girder Bridge Structure

Two heavy-duty girders (box-type or truss design) for high load capacity (typically 5–100+ tons).

Provides better hook height and span than single-girder cranes.

2. Electromagnetic Lifter (Electromagnet)

Powered by DC current to generate a strong magnetic field.

Can lift flat steel plates, round bars, or scrap metal without slings/chains.

Adjustable lifting force (varies with material thickness and weight).

3. Trolley & Hoist System

Motorized trolley moves along the girders for precise positioning.

Hoist mechanism (chain or wire rope) raises/lowers the electromagnet.

Some models include a rotator for turning loads.

4. Power & Control System

Electric power supply (with backup battery for safety).

Cabin or remote control for operator flexibility.

Voltage regulator to adjust magnetic strength.

5. Safety Systems

Emergency power-off (EPO) in case of power failure.

Overload protection to prevent magnet detachment.

Anti-sway system for stable lifting.

 

Comparison: Electromagnetic vs. Hook-Based Overhead Cranes

Feature	Electromagnetic Crane	Standard Hook Crane
Load Type	Only ferrous metals	Any material (with slings)
Lifting Speed	Faster (no rigging)	Slower (requires attachment)
Precision	High (direct contact)	Depends on rigging skill
Maintenance	Higher (electrical parts)	Lower (mechanical only)

 

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 breakdown of the components of a Premium Double Beam Overhead and Bridge Crane:

 

1. Main Structural Components

A. Double Girder Bridge

Two parallel girders (box-type or truss design) spanning the crane bay.

Made of high-strength steel for heavy-duty lifting (5-100+ tons).

Provides greater hook height than single-girder cranes.

 

B. End Trucks (End Carriages)

Steel frames with wheels that run on runway rails.

Contain drive motors, brakes, and buffers for movement.

C. Runway Beams & Rails

Support the entire crane structure.

Installed on building columns or freestanding supports.

2. Lifting & Handling Components

A. Electromagnet (Lifting Magnet)

Core component that generates magnetic field when energized.

DC-powered (requires rectifier to convert AC to DC).

Types:

Rectangular magnets for plates/sheets.

Circular magnets for coils/scrap.

Multi-pole magnets for irregular shapes.

B. Magnet Power Supply System

Thyristor rectifier – Converts AC to DC for the magnet.

Cable reel or festoon system – Delivers power to the magnet.

Backup battery – Prevents load drops during power failure.

C. Hoist & Trolley

Electric hoist (chain or wire rope) – Raises/lowers the magnet.

Motorized trolley – Moves the magnet along the girders.

May include a rotator to turn loads.

 

3. Drive & Motion Systems

A. Bridge Drive

Motors, gearboxes, and wheels for longitudinal movement.

Frequency-controlled for smooth starts/stops.

B. Trolley Drive

Allows cross-travel along the girders.

Precision control for accurate positioning.

C. Braking Systems

Electromagnetic brakes – For immediate stopping.

Emergency brakes – Backup safety measure.

4. Electrical & Control Systems

A. Operator Controls

Pendant control (hang-down or wireless remote).

Cabin control (for large cranes with better visibility).

B. Electrical Panel

Main disconnect switch – For power cutoff.

Contactors, relays, and PLC – For automation.

Overload protection – Prevents magnet failure.

C. Safety Devices

Load limiter – Prevents overloading.

Limit switches – Stops crane at track ends.

Anti-sway system – Reduces load swing.

5. Auxiliary Components

Cooling system – Prevents magnet overheating.

Cable management – Festoon or reel for power/data cables.

Lighting & alarms – For visibility and warnings.

Sketch

Main technical

 

 

Advantages of Premium Double Beam Overhead and Bridge Crane

Efficient Material Handling

No slings/chains needed – The electromagnet directly lifts ferrous materials, reducing setup time.

Faster loading/unloading compared to traditional hook-based cranes.

High Precision & Control

Adjustable magnetic force allows handling of different material thicknesses.

Smooth positioning with variable speed control (via frequency drives).

Increased Safety

No manual rigging reduces worker injury risks.

Fail-safe mechanisms (backup power, emergency brakes) prevent load drops.

Versatile Load Handling

Can lift steel plates, coils, pipes, scrap metal, and machinery parts.

Suitable for both stacked and loose materials.

Space-Saving Design

Double girder structure maximizes hook height, allowing better warehouse space utilization.

No need for additional clamping tools.

Automation Compatibility

Can integrate with PLC systems for automated factory operations.

Supports remote monitoring for Industry 4.0 applications.

 

Applications of Premium Double Beam Overhead and Bridge Crane

1. Steel Mills & Metal Fabrication

Handling steel coils, sheets, and plates in rolling mills.

Transporting castings, billets, and structural beams.

2. Scrap Yards & Recycling Plants

Sorting and moving ferrous scrap metal.

Loading/unloading shredded steel for recycling.

3. Shipbuilding & Heavy Machinery

Lifting steel hull sections, engine parts, and large metal components.

Positioning welded structures in assembly lines.

4. Construction & Infrastructure

Handling reinforcement bars (rebar), girders, and steel frameworks.

Transporting prefabricated steel modules.

5. Automotive & Manufacturing

Moving stamped metal parts in production lines.

Handling press molds and dies.

6. Ports & Logistics

Loading/unloading steel cargo from ships and trucks.

Stacking steel containers and coils in storage yards.

 

The production procedure for a Premium Double Beam Overhead and Bridge Crane involves several key stages, from design to final testing. Below is a detailed step-by-step overview:

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1. Design & Engineering

Load & Span Calculation: Determine crane capacity (45 tons), span (distance between rails), lifting height, and duty cycle (FEM/ISO classification).

Structural Design:

Main girders (box-type or truss design)

End carriages (for movement along rails)

Hoist and trolley mechanism

Electrical & Mechanical Design:

Motor power, gearbox, brakes, and control system

Wiring, pendant/radio remote control, or cabin operation

Software & Simulation: Finite Element Analysis (FEA) for stress testing.

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2. Material Procurement

Steel Plates & Profiles: High-quality Q235B/Q345B steel for girders.

Electrical Components: Motors (hoist/travel), brakes, limit switches, and control panels.

Mechanical Parts: Wheels, gears, wire ropes, hooks, and bearings.

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3. Fabrication of Main Components

A. Double Girder Fabrication

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

Assembly: Align and weld girders with end carriages.

Shot Blasting & Painting: Anti-rust treatment (primer + topcoat).

B. Hoist & Trolley Assembly

Hoist Mechanism:

45-ton electric wire rope hoist (or chain hoist).

Drum, motor, gearbox, and brake assembly.

Trolley Frame: Fabrication and mounting of wheels, motors, and rails.

C. End Carriages

Frame Construction: Welded steel with wheel assemblies.

Buffers & Bumpers: Installation for collision protection.

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4. Electrical System Installation

Wiring & Controls:

Power supply (3-phase AC)

Variable Frequency Drives (VFDs) for smooth operation

Pendant/remote control system

Safety Devices:

Overload limiter

Limit switches (upper/lower travel)

Emergency stop

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5. Assembly & Integration

Erection of Girders: Mount double girders onto end carriages.

Trolley & Hoist Installation: Position trolley between girders; secure hoist.

Rail Alignment: Ensure runway rails are level and parallel.

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6. Testing & Quality Control

A. Factory Testing (Before Shipment)

No-Load Test: Run crane without load to check movement, brakes, and controls.

Load Test:

Static Test: 1.25 × rated load (56.25 tons) for 10 mins.

Dynamic Test: 1.1 × rated load (49.5 tons) with movements.

Safety Checks: Verify limit switches, emergency stop, and overload protection.

B. On-Site Testing (After Installation)

Re-run load tests under customer supervision.

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7. Painting & Corrosion Protection

Final Coating: Weather-resistant paint (e.g., epoxy zinc-rich primer).

Markings: Labels for load capacity, warnings, and manufacturer info.

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8. Packaging & Delivery

Disassembly (if needed): For easy transport.

Packaging: Waterproof wrapping for sea/land shipping.

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9. Installation & Commissioning (On-Site)

Runway Beam Inspection: Ensure proper alignment and strength.

Crane Assembly: Reassemble girders, hoist, and electrical systems.

Final Testing: Conduct load tests and operator 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%.