50T Double Beam Bridge Traveling Crane

A 50T double beam bridge traveling crane is a type of double girder overhead crane used for heavy-duty lifting in industrial environments such as warehouses, factories, power plants, steel mills, and shipyards. It is designed to lift loads up to 50 tons safely and efficiently.

 

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

 

 

1.Main beam

1)Box-type Welded Structure
High-strength design to reduce deflection and improve stability.
Welded from steel plates using automatic submerged arc welding (SAW).
Internal reinforcement plates for added stiffness.
2)Camber (Upward Arch)
Built-in camber typically between 1/1000 and 1/800 of the span to compensate for elastic deflection under full load.
3)Trolley Rail Installation
A square steel rail or flat rail is fixed on top of each beam for trolley movement.
Precisely aligned to ensure smooth trolley travel.

 

2.Lifting System

The lifting system is the core functional unit of the crane, responsible for lifting and lowering heavy loads. It consists of several integrated mechanical and electrical components mounted on the trolley that travels between the two bridge girders.

3.End carriage

Manufacturing & Assembly
Precision machining for wheel alignment to avoid rail wear.
Ultrasonic testing of welds and critical parts.
Shot blasting for anti-rust surface preparation.
Coated with anti-corrosive paint (epoxy/polyurethane).
Assembled and tested before shipment to ensure accuracy.

 

 

4.Crane travelling mechanism

Operating Principle
1)Drive motors rotate through gear reducers to transfer torque to the driven wheels.

2)Crane moves along the rails fixed on the runway beam of the workshop.

3)Trolley and hoisting system move with the crane while maintaining full stability.

4)Brakes automatically engage when travel command stops or power fails.

5.Trolley travelling mechanism

The trolley traveling mechanism is mounted on the bridge girders and enables the trolley (which houses the hoisting system) to move laterally (cross-travel) along the crane span. This mechanism is responsible for positioning the hoist precisely over the load or drop location.

7.Crane Hook

The crane hook is the final load-lifting component of the crane's lifting system. It directly engages with the load through slings, chains, or lifting fixtures and is critical for load safety, balance, and efficiency. For a 50-ton crane, it is typically part of a hook block with pulleys.

8.Motor

The motor system in a 50T bridge crane is one of the most critical power sources and is used in multiple crane mechanisms, including:

Lifting (hoisting)

Trolley traveling (cross travel)

Crane traveling (long travel)

Each of these systems typically uses a dedicated motor, designed for heavy-duty, high-torque, and frequent start/stop operations.

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9.Sound and light alarm system & limit switch

To ensure safe and efficient crane operations, a 50T bridge crane is equipped with an alarm system and multiple limit switches. These components provide audible/visual warnings and mechanical/electrical safety interlocks to prevent over-travel, collisions, and accidents.
1)Sound and Light Alarm System
Function
Alerts personnel to crane movement, load lifting, or emergencies via flashing lights and audible alarms.
2)Limit Switches
Function
Prevent mechanical over-travel or damage by stopping movement automatically when motion reaches its physical or preset limit.

10.Safety Devices

Due to the high load capacity and operating environment of a 50T crane, a full set of mechanical, electrical, and electronic safety devices is critical to protect:

Operators and personnel

Crane structure

Equipment and loads

These devices prevent accidents, extend crane lifespan, and ensure regulatory compliance (e.g., ISO, FEM, OSHA).

11.Control Mode

1)Improved operating precision and smoothness

2)Enhanced safety through emergency stops and interlocks

3)Increased operator comfort and mobility

4)Reduced mechanical wear by soft start/stop of motors

5)Remote operation capability for hazardous environments

6)Easy integration with monitoring and maintenance systems

 

12.Sketch

Main technical

 

 

1. High Load Capacity & Stability
Designed to safely lift and transport heavy loads up to 50 tons.

Double beam design provides superior strength and rigidity.

Less beam deflection under heavy loads, ensuring precise lifting.

2. Increased Span and Coverage
Suitable for wide workshop spans, allowing efficient coverage of large working areas.

Enables longer trolley travel for flexible load positioning.

3. Smooth and Efficient Operation
Equipped with advanced hoisting and traveling motors (often with VFD control) for smooth start/stop and speed regulation.

Reduces mechanical shock and prolongs equipment lifespan.

4. Enhanced Safety Features
Integrated with multiple safety devices such as overload limiters, limit switches, emergency stops, anti-derailment devices.

Sound and light alarms warn personnel, reducing accident risk.

5. Versatility and Application Range
Can be customized with various lifting attachments (hooks, grabs, magnets) to handle diverse loads.

Widely used in manufacturing, warehouses, shipyards, steel mills, and heavy industry.

6. Durability and Low Maintenance
Robust structure with corrosion-resistant coatings.

High-quality motors and components ensure long service intervals.

Modular design allows easy inspection and part replacement.

7. Operator Comfort and Control
Multiple control modes (pendant, cabin, remote) provide flexible operation.

Smooth controls improve operator accuracy and reduce fatigue.

 

1. Heavy Manufacturing Plants
Handling large components such as engines, turbines, presses, and heavy machinery.

Assembly line transport of heavy parts.

2. Steel Mills and Foundries
Lifting heavy steel coils, slabs, and castings.

Moving molten metal containers and large molds safely.

3. Shipyards and Ports
Loading/unloading heavy ship parts, containers, and equipment.

Assisting in shipbuilding and repairs by moving large hull sections.

4. Construction Sites
Transporting heavy building materials like steel beams, concrete modules, and prefabricated structures.

Assisting in erecting large frameworks.

5. Warehouses and Logistics Centers
Moving bulky and heavy goods within large storage facilities.

Loading and unloading trucks or railcars.

6. Power Plants
Handling turbines, generators, transformers, and other heavy power equipment.

Maintenance and installation tasks requiring precise heavy lifting.

7. Automotive and Aerospace Industries
Moving heavy vehicle parts, engines, and assemblies during manufacturing.

Transporting aircraft components within production facilities.
 

 

 

1. Design and Engineering
Confirm technical specifications (load capacity, span, lifting height).

Structural design of main beams, end carriages, trolley, and hoisting system using CAD and FEA software.

Electrical and control system layout design.

Compliance checks with relevant standards (ISO, FEM, OSHA).

2. Material Procurement
Source high-quality steel plates, structural steel sections, motors, electrical components, limit switches, and safety devices.

Verify material certifications and quality standards.

3. Fabrication of Main Components
Cutting & Shaping: Use CNC plasma cutting or laser cutting for steel plates.

Welding: Assemble main beams, end carriages, trolley frames using precise welding techniques.

Heat Treatment: Stress relief welding distortion by heat treatment if required.

Machining: Machine wheel seats, bearing seats, shaft holes, and motor mounting points.

Surface Treatment: Sandblasting and applying primer, then coating with anti-corrosion paint.

4. Assembly of Mechanical Parts
Assemble main beams with end carriages.

Install wheelsets and axle assemblies.

Mount trolley frame and hoisting mechanism (drum, wire rope, hook block).

Install brakes and gearbox on motors.

5. Electrical System Installation
Install motors (hoist, trolley, bridge travel).

Mount electrical panels, control cabinets.

Wire all sensors, limit switches, alarms, and control devices.

Connect power cables and control cables.

6. Quality Control & Testing
Non-destructive testing (NDT): Weld inspections by ultrasonic or magnetic particle methods.

Dimensional inspection: Check critical dimensions and tolerances.

Electrical tests: Insulation resistance, continuity, and control circuit tests.

Load testing: Perform static and dynamic load tests at 100% and 125% rated load.

Functional testing: Test all crane movements, alarms, safety devices, and control systems.

7. Painting and Finishing
Final painting for corrosion resistance and aesthetics.

Apply safety markings and labels.

8. Packaging and Delivery
Disassemble components if needed for transport.

Secure packaging to avoid damage during shipment.

Prepare manuals, certificates, and test reports.

9. Installation and Commissioning (On-site)
Assemble crane components on-site.

Align rails and fix end stops.

Connect power supply and control system.

Conduct on-site testing and operator training.

Final acceptance and handover.

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%.