JKB Mine Hoist Product Introduction

1. Product Overview

JKB series mine hoists are flameproof single-rope winding hoisting equipment, specially designed for explosive environments containing gas or coal dust in coal mines, suitable for material lifting and personnel transportation in vertical and inclined shafts.

Its core advantages include strong explosion-proof performance, compact structure, and high safety factor, which complies with the "Coal Mine Safety Regulations" and AQ 1035-2007 "Safety Inspection Specifications for Single Rope Winding Mine Hoists for Coal Mines". 

This series of equipment supports variable frequency speed regulation and PLC control, and can adapt to complex underground working conditions, especially suitable for small and medium-sized mines with medium annual output and a depth of less than 400 meters.

2. Core structure and design features

Spindle device:

Adopts split drum structure (such as JKB-2.5×2P), which is convenient for underground transportation and installation. The material is 16Mn high-strength steel, and the surface is pressed with engineering plastic rope groove to reduce wear.

The spindle and reducer are directly connected through a gear coupling, with a transmission efficiency of ≥90%, and are supported by double-row spherical roller bearings with strong impact resistance.

Brake system:

Disc brake: rear-mounted cylinder design, the braking force is provided by a disc spring, supports secondary braking and constant deceleration mode, and the braking torque is ≥3 times the maximum static torque.

Hydraulic station: rated working oil pressure 6.3MPa, equipped with a proportional valve to adjust the pressure, supports automatic braking and redundant control when power is off.

Transmission system:

Planetary gear reducer: hardened tooth surface design (material 20CrMnTi carburized and quenched), transmission ratio range 20-31.5, low operating noise and long life;

Variable frequency speed motor: power range 200-800kW, suitable for explosion-proof environment, energy saving more than 30%.

3. Safety protection and explosion-proof characteristics

Explosion-proof design: electrical equipment complies with GB 3836.1/2 explosion-proof standards, and the motor and electronic control system adopt a fully enclosed explosion-proof structure;

Multiple monitoring: integrated overspeed, overwinding, loose rope, brake shoe wear sensors, interlocked control with the main motor;

Emergency mechanism: supports constant deceleration safety braking and secondary braking, and the hydraulic station automatically triggers redundant braking when power is off.

4. Application scenarios and restrictions

Applicable scenarios:

Lifting personnel in gas-containing environments in coal mines (JKB explosion-proof models are required);

Transportation of ore and gangue in inclined shafts (maximum load ≤ 160kN);

Suspension of vertical shaft excavation equipment (such as hoisting plates, water pumps).

Restrictions:

Non-explosion-proof models are strictly prohibited from being used in explosive environments;

Number of wire rope winding layers: single layer for vertical shafts, double layers for cargo, and three layers for inclined shafts.