Double Girder Gantry Crane in Outdoor Workshop

Key Features of Double Girder Gantry Crane in outdoor Workshop

1. Weather-Resistant Construction

Corrosion Protection – Galvanized steel or special anti-rust coatings.

Sealed Electrical Components – IP55 or higher protection against dust and water.

Wind-Resistant Design – Some models include anemometers to monitor wind speed and auto-braking systems.

2. High Load Capacity & Span

Typically ranges from 5 to 500+ tons.

Span can extend up to 40m or more (customizable).

3. Sturdy Mobility System

Rail-Mounted or Rubber-Tired Wheels – Depending on ground conditions.

Heavy-Duty Travel Motors – For smooth movement on uneven or rough terrain.

4. Advanced Control Systems

Radio Remote Control – Allows flexible operation from a safe distance.

Variable Frequency Drives (VFDs) – Ensure smooth acceleration and braking.

Cabin or Pendant Control – For precision handling.

5. Safety & Stability Enhancements

Anti-Sway Technology – Reduces load swinging in windy conditions.

Overload Protection – Prevents crane operation beyond safe limits.

Rail Clamps & Brakes – Prevent unintended movement.

 

Types of Double Girder Gantry Crane in outdoor Workshop

Type	Best For	Features
Rail-Mounted Gantry (RMG)	Ports, heavy industries	Runs on fixed rails, high precision
Rubber-Tired Gantry (RTG)	Container yards, uneven ground	Mobile, no rails needed
Adjustable Leg Gantry	Temporary construction sites	Legs can extend for different heights
Semi-Gantry Crane	One-side supported (wall/column)	Saves space, good for workshops with partial outdoor use

 

Lifting Capacity 320 tons
Span (Width) 3 - 12 meters (adjustable)
Lifting Height 3 - 10 meters
Working Class A3-A5 (light to medium duty)
Hoisting Speed 0.5 - 8 m/min (variable)
Main Beam Type Single/double girder (box-type)
Power Supply 220V/380V 3-phase or manual
Control Mode Pendant control/wireless remote
Hoist Type Electric chain hoist/wire rope hoist
Travel Drive Manual push or motorized
Corrosion Protection Hot-dip galvanized or marine-grade paint
Wind Resistance Up to Beaufort scale 6 (for outdoor use)
Operating Temp -20°C to +50°C

 

Here's a detailed breakdown of the components in an Double Girder Gantry Crane in outdoor Workshop, presented in a clear table format for easy reference:

1. Bridge Structure - Main girders (2) Primary load-bearing beams made of welded steel box sections or truss design
- End carriages Support structures connecting girders to legs with wheel assemblies
- Cross braces Provide lateral stability and prevent girder twisting

 

2. Hoisting System - Electric hoist (main) Primary lifting mechanism (5-550+ ton capacity)
- Trolley assembly Motorized unit that travels along girders carrying the hoist
- Wire rope & hook block Lifting medium with swivel hook for load attachment
- Optional auxiliary hoist Secondary lifting device for lighter loads

 

3. Motion Systems - Gantry travel mechanism Motorized wheels (4-16 wheels total) with rail clamping system
- Trolley travel mechanism Motorized movement along girder length
- Rail system Ground-mounted or embedded tracks for crane movement (typically QU70-QU120 rails)

 

4. Power & Control - Festoon system/conductor bars Power delivery system for trolley movement
- Control panel with VFDs Centralized control with variable frequency drives for smooth operation
- Operator interfaces Pendant station (IP65 rated), radio remote, or enclosed cabin

5. Electrical System - Main power supply (415V 3-phase) Primary energy source with cable reel management
- Limit switches Position control for hoist/trolley travel
- Emergency stop system Safety cutoff at multiple locations

 

 

 

6. Safety Features - Overload limiter Electronic load monitoring system
- Anti-collision system Laser or radar-based for multiple crane operations
- Anemometer (outdoor models) Wind speed monitoring with automatic shutdown
- Buffer & bumper system Energy absorption at travel limits

 

7. Structural Extras - Walkways & platforms Maintenance access with anti-slip surfaces
- Lighting system LED work area illumination for night operations
- Corrosion protection Special coatings or galvanization for outdoor use

SKETCH

 

Main technical

 

Advantages of Electric Double Girder Gantry Cranes

Feature	Benefit	Technical Specification
1. High Load Capacity	Handles 5-550+ tons (vs. single girder's 1-20 ton limit)	Box-section girders reduce deflection (<1/1000 span)
2. Extended Span	Covers 10-40m spans without intermediate support	Adjustable leg spacing for site flexibility
3. Superior Hook Height	Extra 1-2m lift compared to single girder (no lower beam obstruction)	Optimized girder geometry maximizes vertical space
4. Enhanced Durability	25-30 year lifespan with proper maintenance (M25 stress grade steel)	IP55 protection for outdoor components
5. Precision Control	±5mm positioning accuracy with VFDs and encoder feedback	4-step braking system for smooth stops
6. Safety Redundancy	Dual-circuit brakes + overload limiter + anemometer (for outdoor models)	SIL-3 rated safety systems
7. Customization	Configurable with magnets, grabs, or automated positioning systems	Up to 3 independent hoists on single crane
8. Energy Efficiency	Regenerative braking recovers 15-20% energy during lowering	IE4 premium efficiency

 

Heavy Manufacturing

Steel Mills: Coil handling (up to 400°C ambient)

Special Feature: Heat-resistant cables + thermal imaging

Shipbuilding: Gantry cranes with 50m+ spans

Example: Hyundai Heavy Industries' 800-ton capacity models

Infrastructure Projects

Bridge Construction: Precast segment installation

Case Study: Hong Kong-Zhuhai-Macao Bridge used 32m span cranes

Power Plants: Turbine erection (precision <10mm alignment)

Data Point: 2,000+ such cranes in Chinese power sector

 

The production process of aDouble Girder Gantry Crane in outdoor Workshop involves several stages, from design and engineering to fabrication, assembly, and testing. Below is a detailed breakdown of the typical production process:

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1. Design & Engineering

Conceptual Design: Engineers create initial sketches and 3D models based on load capacity (200 tons), reach, mobility, and environmental conditions (marine use).

Structural Analysis: Finite Element Analysis (FEA) ensures the crane can handle dynamic loads, wind, and wave forces.

Hydraulic & Electrical Systems: Design of hydraulic cylinders, winches, and control systems for smooth lifting operations.

Material Selection: High-strength steel (e.g., ASTM A514) for corrosion resistance in marine environments.

Regulatory Compliance: Meets standards like DNV-GL, ABS, or Lloyd's Register for marine cranes.

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2. Material Procurement

Steel Plates & Beams: Sourced for the boom, chassis, and structural framework.

Hydraulic Components: Pumps, cylinders, hoses, and valves from certified suppliers.

Electrical Systems: Motors, sensors, and control panels (often waterproof for marine use).

Wire Ropes & Sheaves: High-grade steel cables for lifting.

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3. Fabrication

A. Structural Fabrication

Cutting & Shaping: CNC plasma/laser cutting for precision parts.

Welding: Automated and manual welding (Submerged Arc Welding for thick sections).

Boom Construction: Lattice or telescopic design for strength and mobility.

Chassis & Outriggers: Reinforced for stability during lifts.

B. Hydraulic & Mechanical Assembly

Hydraulic System: Installation of pumps, cylinders, and hoses.

Winches & Drums: Mounted for lifting and lowering operations.

Slewing Mechanism: Allows 360° rotation (if applicable).

C. Electrical & Control Systems

Control Cabin: Waterproof operator station with joysticks/sensors.

Load Monitoring: Load cells and limit switches for safety.

Power Supply: Diesel engine or electric motor (marine-grade).

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4. Assembly & Integration

Boom Installation: Mounted onto the chassis with pivot points.

Counterweights: Added for balance (if required).

Final Wiring & Plumbing: Connecting hydraulic and electrical systems.

Painting & Coating: Anti-corrosion paint (epoxy or zinc coatings).

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5. Testing & Quality Control

Load Testing: Lifting 200 tons (+25% overload test, per standards).

Functional Tests: Checking hydraulic movements, rotation, and stability.

Environmental Tests: Salt spray tests for marine durability.

Safety Checks: Emergency stop systems, overload alarms.

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6. Delivery & Commissioning

Transport: Disassembled for shipping or delivered as a mobile unit.

On-Site Assembly: Reassembled at the dock or shipyard.

Operator Training: Handling and safety protocols.

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%.