Double Girder Overhead Crane For Coal Mining

Key Features of Double Girder Overhead Cranes in Coal Mining:

High Load Capacity (Up to 500+ Tons)

Designed to lift heavy coal mining equipment, machinery, and bulk materials.

Suitable for moving large components like crushers, draglines, and conveyor systems.

Long Span & Heavy-Duty Performance

Can cover large work areas in coal processing plants, mines, and storage yards.

Built to withstand harsh mining environments (dust, moisture, vibrations).

Explosion-Proof & Corrosion-Resistant Options

Explosion-proof motors and electrical components for hazardous coal dust environments.

Corrosion-resistant coatings to protect against moisture and chemicals.

Customizable Lifting Attachments

Equipped with grabs, magnets, or clamshell buckets for handling coal, ore, and waste material.

Can integrate with automated systems for efficient coal loading/unloading.

Enhanced Safety & Reliability

Fail-safe brakes, overload protection, and limit switches to prevent accidents.

Closed girder design for better dust and debris resistance.

 

 

Considerations When Choosing:

Duty Class (FEM, ISO, or CMAA Standards) – Typically Class E (Heavy Duty) or Class F (Severe Duty) for coal mining.

Environmental Conditions – Explosion-proofing, dust sealing, and heat resistance may be required.

Automation & Remote Control – For safer operation in hazardous zones.

 

Comparison with Other Lifting Methods

Feature	Overhead Crane	Mobile Crane	Forklift
Load Capacity	Up to 500+ tons	Limited (usually <100 tons)	Low (<50 tons)
Space Efficiency	Best (overhead operation)	Requires ground space	Limited reach
Safety in Coal Dust	Explosion-proof options	Risky (diesel/engine sparks)	Limited safety
Maintenance	Low (fewer moving parts)	High (engine, hydraulics)	Moderate
Automation	Easily automated	Manual operation	Limited

 

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

 

A double girder overhead crane used in coal mining consists of several critical components designed for heavy-duty, reliable, and safe operation in harsh environments. Below is a breakdown of the key components:

 

1. Bridge Structure (Main Load-Bearing Frame)

Double girders (box-type or truss design) – Provide high strength and stability for heavy loads.

End trucks (with wheels) – Allow the crane to move along the runway rails.

Buffers & bumpers – Absorb shock during travel limits.

2. Hoisting Mechanism

Electric hoist (wire rope or chain) – Lifts and lowers loads.

Wire rope hoist (preferred for heavy coal loads, e.g., 5–500+ tons).

Chain hoist (for lighter-duty applications).

Drum or sheave assembly – Guides the lifting rope/chain.

Hook block & pulley system – Distributes load weight evenly.

3. Trolley & Traveling Mechanism

Trolley frame – Moves horizontally along the bridge girders.

Trolley wheels & drive motors – Enable smooth travel across the span.

Braking system – Ensures controlled stopping.

4. Runway System

Runway beams (steel or reinforced concrete) – Supports the crane's movement.

Rail tracks – Guides the crane's travel path.

Rail clamps & anti-derailment devices – Prevent accidental dislodging.

5. Electrical & Control System

Explosion-proof motors & wiring – Essential for coal dust environments (ATEX/IECEx certified).

Variable Frequency Drives (VFDs) – Ensure smooth acceleration/deceleration.

Control options:

Pendant control (wired or wireless) – Manual operation.

Radio remote control – For safer operation in hazardous zones.

Automated control (PLC-based) – For integration with coal handling systems.

6. Safety & Auxiliary Components

Overload limit switch – Prevents lifting beyond capacity.

Emergency stop (E-stop) button – Immediate shutdown in case of danger.

Anti-collision system – Used when multiple cranes operate in the same area.

Dust & moisture-resistant enclosures – Protect electrical components.

Cabin (optional) – For operator control in harsh conditions.

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7. Special Attachments for Coal Handling

Grab buckets – For bulk coal lifting and dumping.

Electromagnetic lifters – For handling scrap metal in maintenance areas.

Rotating hooks – For precise positioning of heavy mining equipment.

Key Considerations for Coal Mining Applications

✔ Explosion-proofing – Required in areas with coal dust (ATEX, IECEx standards).
✔ Corrosion resistance – Coatings (epoxy, galvanized) to prevent rust from moisture and chemicals.
✔ High-duty cycle – Designed for continuous operation (FEM/ISO Class F).
✔ Maintenance-friendly design – Easy access to lubrication points and wear parts.

 

SKETCH

Main technical

 

 

Overhead cranes (especially double girder types) are essential in coal mining due to their strength, efficiency, and safety. Key advantages include:

1. High Load Capacity & Durability

Can handle 5–500+ tons, making them ideal for heavy coal, machinery, and equipment.

Reinforced steel construction withstands shock loads, vibrations, and harsh mining conditions.

2. Efficient Material Handling

Faster loading/unloading of coal compared to manual or forklift methods.

Grab buckets, magnets, and clamshell attachments optimize coal transport.

3. Space Optimization

Operates overhead, freeing up floor space for other mining operations.

Ideal for coal processing plants, stockyards, and workshops.

4. Enhanced Safety

Explosion-proof motors & electrical systems (ATEX/IECEx certified) for coal dust environments.

Overload protection, limit switches, and anti-collision systems prevent accidents.

5. Reduced Downtime & Labor Costs

Automated & remote-controlled options minimize human intervention in hazardous zones.

Low maintenance compared to mobile cranes (fewer moving parts).

6. Adaptability to Harsh Conditions

Corrosion-resistant coatings protect against moisture and chemicals.

Dust-proof and heat-resistant designs for coal mines and processing plants.

 

1. Coal Handling & Transport

Loading/Unloading – Transferring coal from trucks, railcars, and ships to processing plants.

Stockpile Management – Stacking and reclaiming coal in storage yards using grab buckets.

2. Processing Plant Operations

Moving coal through crushers, screens, and conveyor systems.

Handling heavy machinery parts during maintenance.

3. Workshop & Maintenance

Lifting draglines, excavators, and conveyor components for repairs.

Underground mining support (in large-scale operations).

4. Waste & Byproduct Handling

Removing slag, rocks, and mining debris from processing areas.

5. Integration with Automation

Automated stacking & reclaiming in modern coal terminals.

Remote-controlled operation in hazardous or high-dust zones.

 

 

1. Order Confirmation & Design
Review customer requirements (capacity, span, lifting height, environment).

Engineering team develops detailed design drawings and 3D models based on FEM/DIN standards.

Confirm technical specs, materials, and delivery schedule with the client.

Obtain client approval on final design.

2. Material Procurement
Source high-quality steel plates, profiles, motors, electrical components, and accessories.

Verify material certifications (e.g., steel grade, motor specs).

Inspect and store raw materials properly to prevent damage.

3. Steel Fabrication
Cut, shape, and machine steel plates and profiles for main girders, end carriages, and trolley frames using CNC machines.

Weld components following strict welding procedures (e.g., MIG/MAG welding) with certified welders.

Perform non-destructive testing (NDT) such as ultrasonic or magnetic particle inspection on welds to ensure quality.

4. Main Beam Assembly
Assemble double girders with cross beams and stiffeners.

Align and weld main beam sections precisely.

Conduct dimensional checks to meet design tolerances.

Apply surface treatment (sandblasting and primer coating).

5. Component Assembly
Assemble end carriages, trolley frame, hoisting mechanism (hook block, drum, wire rope), motors, brakes, and gearboxes.

Fit mechanical components and test moving parts for smooth operation.

6. Surface Treatment & Painting
Clean all steel surfaces (blast cleaning).

Apply high-quality industrial coatings or paint systems, typically anti-corrosion primer plus finish paint (usually RAL colors).

Allow proper drying and curing to ensure durability.

7. Electrical Wiring & Control System Installation
Install motors, control panels, and electrical wiring according to electrical schematics.

Mount control devices such as pendant controls, limit switches, alarms, and sensors.

Integrate PLC or VFD drives as required.

Conduct insulation resistance and continuity tests.

8. Initial Testing & Quality Inspection
Perform no-load test runs for lifting, trolley travel, and bridge travel.

Verify all safety devices (limit switches, overload protection, emergency stop).

Inspect welds, alignments, and surface finish.

Document test results and corrections.

9. Load Testing
Perform load test according to FEM/ISO standards with a test load (usually 125% of rated capacity).

Observe crane behavior under load: lifting, lowering, travel motions, brakes.

Record results and certify load test completion.

10. Final Inspection & Packing
Conduct a final comprehensive inspection.

Package crane components securely for transport (especially if shipped in parts).

Prepare all documentation: manuals, certifications, test reports.

11. Delivery & Installation
Transport crane to customer site.

Assist or supervise installation and commissioning.

Provide operator training and maintenance guidance.

12. After-Sales Support
Offer maintenance, spare parts supply, and technical support.

Follow up on customer satisfaction and crane performance.

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%.