Qdy Overhead Crane

Why Choose QDY for Coal Mining?

✔ Legal Compliance: Meets strict safety regulations for hazardous areas.
✔ Risk Mitigation: Eliminates ignition sources in explosive atmospheres.
✔ Long-Term Savings: Reduces accident risks and unplanned downtime.

 

Comparison with Standard Cranes

Feature	QDY Crane	Standard Crane
Explosion Proofing	Yes (ATEX/IECEx)	No
Coal Mine Use	Safe for methane/dust zones	Prohibited in hazardous areas
Maintenance	Sealed components, less frequent	Higher frequency
Cost	Higher initial cost	Lower, but unsafe for coal mines

 

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

 

 

The QDY explosion-proof overhead crane consists of specialized components designed for safe operation in hazardous coal mining environments. Here's a detailed breakdown of its key components:

 

1. Explosion-Proof Bridge Structure

Double box girders (heavy-duty welded steel construction)

Flameproof end carriages with non-sparking wheel materials

Buffers with anti-static coating (Zone 1/21 compliant)

2. Hazardous Area Hoisting Mechanism

Ex d flameproof hoist motor (GB3836.2/ATEX certified)

Spark-resistant wire rope drum with special lubrication

Intrinsically safe limit switches (dual-circuit design)

Non-sparking hook block (copper-aluminum alloy sheaves)

3. Explosion-Proof Trolley System

Pressurized control cabinet (prevents dust ingress)

Ex e increased safety trolley motors

Grounding brushes on all moving parts

Special alloy wheel flanges (spark-resistant)

4. Hazardous Location Electrical System

Intrinsically safe control circuit (<24V DC)

Ex d flameproof junction boxes

Anti-static pendant station (with mechanical e-stop)

Explosion-proof frequency converter (for soft starts)

5. Special Safety Components

Methane detection interlock (auto-shutdown at 1% LEL)

Static electricity discharge system

Dust-tight cable entries (IP66 rated)

Temperature monitoring sensors on all bearings

6. Runway System for Coal Mines

Galvanized runway beams with extra corrosion protection

Explosion-proof rail clamps

Conductive rail joints (for proper grounding)

Dust-proof rail sweeps

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7. Optional Coal-Specific Attachments

Explosion-proof grab bucket (for coal handling)

ATEX-certified electromagnetic lifter

Dust-suppression spray system (for loading zones)

Critical Material Specifications

Housing materials: Aluminum alloy (for non-sparking)

Cable insulation: XLPE with anti-static coating

Lubricants: Non-flammable synthetic grease

Paint: Conductive epoxy coating (surface resistance <1GΩ)

 

SKETCH

Main technical

 

 

Key Advantages of QDY Overhead Cranes in Coal Mining

1. Explosion-Proof Safety

Certified for Hazardous Zones: Complies with ATEX, IECEx, and GB3836 standards for use in methane (Zone 1) and coal dust (Zone 21) environments.

Spark-Free Operation: All electrical components (motors, controls, wiring) are intrinsically safe or flameproof.

Static Control: Grounding systems and non-sparking materials prevent static electricity buildup.

2. Heavy-Duty Performance

High Capacity: Handles 5–320 tons, ideal for coal, mining equipment, and machinery.

Robust Construction: Reinforced steel girders with anti-corrosion coatings for humid, abrasive environments.

3. Operational Efficiency

Automation Ready: Integrates with remote control or PLC systems for automated coal handling.

Low Maintenance: Sealed bearings and dust-proof enclosures reduce downtime.

4. Enhanced Safety Features

Methane Detection: Auto-shutdown if gas concentration exceeds safe limits.

Dual Braking System: Mechanical + electromagnetic brakes for fail-safe load holding.

Anti-Collision: Sensors prevent clashes with other equipment in congested mines.

 

1. Underground Mining

Equipment Handling: Moves heavy machinery (drill rigs, conveyors) in methane-prone areas.

Coal Transport: Transfers raw coal from extraction points to storage or processing.

2. Surface Operations

Coal Loading/Unloading: Uses explosion-proof grab buckets for trucks, railcars, or ships.

Stockpile Management: Stacking and reclaiming coal in open yards.

3. Processing Plants

Crusher/Washer Maintenance: Lifts and positions heavy components during repairs.

Dusty Environments: Operates safely in coal preparation plants (Zone 22).

4. Hazardous Zone Support

Ventilation Shafts: Installed in areas with high gas/dust concentrations.

Emergency Response: Used for equipment recovery in accident-prone 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%.