Dragging cable for underground digger

Abstract

A dragging cable for an underground digger comprises a cable core, an inner sheath 9, an anti-torsion woven layer 10 and an outer sheath 11. The cable core is formed by twisting three power wire cores, three ground wire cores and a Y-shaped filling core. The lay ratio of the cable core is 8 to 11 times. The cable core is sequentially coated with the inner sheath 9, the anti-torsion woven layer 10 and the outer sheath 11 from inside to outside. The Y-shaped filling core is formed by a center monitoring wire core and a Y-shaped support 12. The center monitoring wire core is formed by a conductor B5 and an insulation layer B6. The center of the Y-shaped support 12 is provided with a through hole 12-1 for containing the center monitoring wire core and the Y-shaped support 12 is provided with three equally-divided vertex angles 12-2. The dragging cable can completely meet the requirement for use in various weather conditions, conductive performance and flexibility are good, the winding radius is small, electromagnetic immunity is high, the tensile strength of the wire cores is effectively improved, bending performance, monitoring performance and the stability of the cable structure are obviously enhanced, and service life is greatly prolonged.

Description

technical field [0001] The invention relates to a towing cable, in particular to a towing cable for an underground mining machine. Background technique [0002] In the prior art, for mining machines used in coal mines, iron mines, zinc mines and other underground occasions, one end of the cable is fixed on the power control cabinet, and the other end is connected to the take-up drum on the mining machine. It needs to be moved frequently and coiled frequently during use, so the cable is required to have good tensile and bending properties. The existing dragging cable is an ordinary rubber-sheathed soft cable, and the core and the filling are not easy to slip relative to each other when it is frequently coiled. This will cause the outer axis of the cable to be elongated and the inner axis to be compressed. Long-term use will easily cause the cable conductor to be damaged. Core breakage occurs, resulting in accidents; secondly, because the core and the filling are not easy to ...

AI Technical Summary

Problems solved by technology

The existing dragging cable is an ordinary rubber-sheathed soft cable, and the core and the filling are not easy to slip relative to each other when it is frequently coiled. This will cause the outer axis of the cable to be elongated and the inner axis to be compressed. Long-term use will easily cause the cable conductor to be damaged. Core breakage occurs, resulting in accidents; secondly, because the core and the filling are not easy to slip relative to each other, even if a small slip can occur, the friction force when sliding is very large, which is easy to cause the rubber sheath to bulge, crack, damage, and lose the sheath Protective effect, thus reducing the insulation performance of the cable

All of these will result in a shorter service life of the cable

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