ATEX Certified Mining Winch For Heavy Loads

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ATEX Certified Mining Winch For Heavy Loads

ATEX certified mining winch for heavy loads is a hydraulic driven transportation equipment specially developed for the complex tunnel environments in underground mines, suitable for various operation scenarios such as mines and slopes. The core structure of the equipment includes the hydraulic drive unit, tracked walking mechanism, hydraulic braking system and control components. Through the precise drive of the hydraulic motor, the tracked mechanism operates smoothly, and the strong adhesion design between the tracked wheels and the ground ensures the stable transportation of coal and mining equipment. It is a key supporting equipment for efficient underground mining operations.

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Product Introduction

Application scenarios and working conditions compatibility

The core lifting equipment specially designed for explosive environments is compatible with the following demanding working conditions:

Operating Environment

Underground: Suitable for shaft/tilt shaft operations in high-gas coal mines and metal mines. It must meet ATEX explosion-proof requirements and can handle harsh environments such as high concentrations of gas, dust, and humidity;

· Open-pit: Applicable for heavy-load traction and lifting operations in open-pit coal mines and metal mines. It features resistance to sandstorms, corrosion, high/low temperatures.

Mine type compatibility

Coal mines: Must obtain ATEX Class I or II explosion-proof certification, suitable for personnel, ore, and material lifting in high-gas mines;

· Metal mines: Applicable to heavy-load lifting requirements in metal mines (both non-ferrous and ferrous), enhancing structural strength and wear resistance to handle large-tonnage ores and waste rocks.

Usage of the equipment

Traction: Dragging heavy equipment and supporting materials in underground tunnels, and transporting large construction machinery in open-pit mines;

· Hoisting: Elevating personnel, ore, and drilling equipment in vertical shafts, and transporting coal or waste rock in inclined shafts;

· Transportation: Facilitating long-distance material transfer through the track system, such as underground branch line transportation and horizontal towing in open-pit mines.

Installation location

Underground: Usually installed at the bottom yard of the mine, at the entrance of the roadway, or in a dedicated winch chamber, and should be far away from areas with gas accumulation;

· Open-pit: Mostly arranged near the mine entrance, at the crushing station or the material transfer yard, and needs to be fixed on a concrete foundation.

Product Structure and Core Components

The ATEX-certified heavy-duty mining winch adopts a modular explosion-proof design. The core components include:

Component Name	Functional Description
Cylinder System	Multi-layer wound cylinder with rope guide device; surface clad with wear-resistant alloy. The wire rope fixation device features an explosion-proof design
Transmission System	Includes hard-toothed reducer (planetary or cylindrical gear structure), explosion-proof coupling, and transmission shaft
Braking System	Equipped with explosion-proof disc brake or block brake, hydraulic station or pneumatic station, with dual braking functions
Drive System	Uses ATEX-certified explosion-proof motor and variable frequency control cabinet, supporting continuous speed adjustment
Safety System	Includes over-winding protection device, rope slack protection device, explosion-proof load sensor, and depth indicator
Explosion-proof Shell	Manufactured from high-strength cast steel or aluminum alloy; passes water pressure testing at 1.5 times the reference pressure

Working principle and operation logic

Motor drive method:

Utilizing ATEX-certified intrinsically safe asynchronous motors, it supports variable frequency speed control to achieve continuous speed adjustment;

The motor housing has an Exd IIB or Exd IIC explosion-proof rating, suitable for various environments with different explosion risks.

Deceleration and braking mechanism:

Deceleration: The high-speed low-torque is converted into low-speed high-torque through a hard toothed reducer, with a transmission efficiency of ≥ 90%.

Braking: It is equipped with a working brake (for normal parking) and a safety brake (for emergency stopping), using hydraulic/pneumatic servo control. The braking response time is ≤ 0.2 seconds.

Load Control:

Utilize a closed-loop control system to monitor the tension of the steel wire rope and the lifting load in real time;

Have the functions of constant-speed lifting and constant-torque output, automatically identifying the load weight and adjusting the operating parameters;

Cooperate with the depth indicator to achieve precise control of the travel distance, preventing over-pulling and over-releasing accidents.

Key technical parameters (typical configuration)

Parameter Category	Typical Value Range	Explanation
Rated Load	10–200 Tons (Customizable Up to 300 Tons)	Classified according to mining grade; heavy-duty models can exceed 300 tons
Steel Wire Rope Speed	0.5–10 m/s (Variable Frequency Adjustable)	Variable frequency control models can achieve continuous speed adjustment from 0.1–12 m/s
Drum Capacity	100–2000 Meters (Customized According to Well Depth)	Customized based on mine depth; single-layer and multi-layer winding options available
Motor Power	30–1000 kW	Matched with load and lifting speed; explosion-proof models require ATEX certification
Power Supply	380V / 660V / 1140V / 3300V	660V and 1140V explosion-proof power supplies are commonly used in underground applications
Working Slope Angle	0° (Horizontal) ~ 45° (Inclined Shaft)	Suitable for different shaft types; additional anti-slip devices required for steep inclinations

Safety performance and mine compliance standards

The ATEX-certified heavy-duty mine hoist must meet strict international explosion-proof standards:

· Explosion-proof design: Compliant with the EU ATEX Directive (2014/34/EU), using Exd flameproof type or Exi intrinsically safe type design;

· Emergency braking: Equipped with a two-stage braking system, with a braking deceleration not exceeding 5m/s², ensuring smooth stopping under heavy-load conditions;

· Overload protection: Integrated with explosion-proof load sensors, automatically shutting down and alarming when the load exceeds the rated value by 110%;

· Compliance with standards: Adheres to the EN 60079 series of explosion-proof standards, GB/T 20961-2007 "Single-rope winding type mine hoist" and other.

Materials, Durability and Industrial Grade

High-strength steel structure:

The drum is forged from Q345B or 45# steel as a whole, and the frame is welded with thick steel plates, with tensile strength ≥ 600MPa;

Wear-resistant components

The surface of the drum is welded with a wear-resistant alloy layer (hardness ≥ HRC45), the steel wire rope is treated with galvanization or plastic coating, and the brake pads use wear-resistant materials with high friction coefficient;

Industrial grade

IP65 protection level, suitable for harsh environments in underground mines with temperatures ranging from -20℃ to 40℃ and humidity of 95%, and certified by international standards such as ATEX and IECEx.

Installation method and operation maintenance

Installation requirements

· It should be fixed on a concrete foundation with sufficient strength, with a horizontal error of ≤ 0.1‰;

· For underground installation, ventilation and maintenance spaces need to be reserved, and it should be linked with the gas monitoring system, with a grounding resistance of ≤ 1Ω;

· The cable introduction device must use explosion-proof flange heads certified by ATEX, with a torque error of ≤ ±10%.

Operation features

· Equipped with a visual explosion-proof operation console, integrating start-stop, speed adjustment, and emergency braking buttons. Some models support remote control;

· Uses a human-machine interface, displaying real-time parameters such as lifting height, load, and speed, with automatic fault diagnosis and prompt.

Daily maintenance

· Daily check the wear of brake shoe, steel wire rope tension, and lubrication conditions;

· Weekly conduct temperature and vibration detection of the reducer and motor;

· Monthly calibrate the depth indicator and overload protection device, and conduct an explosion-proof surface inspection every 3 months. If the gap exceeds 0.1mm, it needs to be replaced;

· Conduct a comprehensive disassembly and maintenance once every half year.