Overview
The 2JKB series mine hoist is a fire-resistant dual-drum single-rope coiling device specifically designed for explosive environments in coal mines containing gases or coal dust; it complies with the AQ 1035-2007 “Safety Inspection Code for Single-Rope Coiled Mine Hoists” and the GB/T 20961-2007 standard. Its core function is to lift materials, personnel, and equipment vertically or in inclined shafts by synchronously coiling steel cables through dual drums. It is particularly suitable for small and medium-sized mines with moderate annual output and a depth of ≤ 400 m. It also features high explosion resistance, a compact structure, and stable operation.
Core Configuration and Design Features
It employs a split-type drum structure, facilitating underground transportation and installation. The material is 16Mn high-strength steel, with a surface featuring a molded grooved channel made of engineering plastic to reduce wear;
The spindle and reducer are directly connected via a gear coupling, providing a transmission efficiency of ≥90%. The bearings are double-row spherical roller bearings with high impact resistance.
Disc brake: rear-mounted cylinder design; braking force is provided by disc springs; supports secondary braking and constant deceleration mode; braking torque is ≥3 times the maximum static torque;
Hydraulic unit: rated oil pressure of 6.3 MPa; equipped with an electro-hydraulic proportional valve; supports automatic power braking and redundant control; and features an adjustable rope clutch (suitable for dual-cylinder models).
Planetary gear reducer: tooth surface hardening design (material: 20CrMnTi, carburized and quenched); transmission ratio range: 20–31.5; low operating noise and long service life;
Variable-frequency motor: power range 315–550 kW; suitable for explosion-proof environments; energy savings exceed 30%.
Integrates a PLC control system, supports manual, semi-automatic, and fully automatic operating modes, and is equipped with the ASCS-3 digital speed control system;
The depth indication system employs a dual-redundant design combining a mechanical pointer with a digital display, providing a positioning error of less than 0.5 meters.
Safety Protection and Explosion-Proof Characteristics
Application Scenarios and Limitations
Parameter
| (2JKB) Technical Parameters | ||||||||||||||||||
| model | drum | Maximum tensile force of the steel wire rope | Maximum tension difference of the steel wire rope | Maximum lifting height or transport length | wirerope | reduction gear ratio | Average improvement rate | electric motor | ||||||||||
| number | diameter | width | Center-to-center distance between the two rollers | manned | Load | somebody | Load | One layer of wrapping | Two-layer winding | Three-layer winding | Maximum diameter | Total fracture strength | speed | maximum power | ||||
| unit | m | Kn | m | mm | Kn | M/s | r/min | KW | ||||||||||
| parameter | 2JKB-2×1P | 2 | 2.0 | 1.0 | / | 60 | 40 | 165 | 363 | 591 | 32 | 540 | 31.5 | 4 | 750 | 185 | ||
| 2JKB-2×1.25P | 2 | 2.0 | 1.25 | / | 222 | 477 | 763 | 32 | 540 | 31.5 | 4 | 750 | 185 | |||||
| 2JKB-2.5×1.2P | 2 | 2.5 | 1.2 | / | 90 | 55 | 228 | 489 | 787 | 40 | 810 | 31.5 | 4.8 | 750 | 315 | |||
| 2JKB-2.5×1.5P | 2 | 2.5 | 1.5 | / | 302 | 638 | 1013 | 40 | 810 | 31.5 | 4.8 | 750 | 315 | |||||
| 2JKB-3×1.5P | 2 | 3.0 | 1.5 | / | 130 | 80 | 280 | 594 | 952 | 50 | 1170 | 31.5 | 6.5 | 750 | 560 | |||
| 2JKB-3×1.8P | 2 | 3.0 | 1.8 | / | 351 | 737 | 1169 | 50 | 1170 | 31.5 | 6.5 | 750 | 560 | |||||
| 2JKB-3.5×1.7P | 2 | 3.5 | 1.7 | / | 170 | 115 | 426 | 862 | / | 58 | 1530 | 31.5 | 8.6 | 750 | 900 | |||
| 2JKB-3.5×2.1P | 2 | 3.5 | 2.1 | / | 462 | 915 | / | 58 | 1530 | 31.5 | 8.6 | 750 | 900 | |||||
