Towing cable for down-hole digger and method for preparing

Abstract

The invention relates to an improvement to a pulling cable used for an under-well mining machine. The invention is characterized in that a chlorosulfonated polyethylene rubber internal-protection layer is directly extruded and coated on the outer part of an intertwisted flexible cable core; a fiber weaved layer which is provided with a 20 to 40 percent weaving density and can resist sulfuration temperature is directly coated without sulfuration process, and a chlorosulfonated polyethylene rubber external-protection layer is directly extruded and coated on the outer part of the weaved layer, and then a one time sulfuration shaping process is carried out. The jointing between the cable core, internal protection layer and the external protection layer are better, and a force is brought not only to the internal and external protection layers together, but also to the cable core; and a cable frequent coiling anti-pulling force is brought to an integrated cable but not the external protection layer alone, thus the integrated tensile capacity of the cable is greatly enhanced and the service life can be prolonged by 10 to 15 times. And a '3 plus 3' structure of the cable core not only can lead the bending radius to be reduced to 6 times of that of a cable diameter, but also can enhance the stability of the cable structure and is good for being against bending and wearing. The cable of the invention has good bending capability and is resistant for frequent moving, collecting and expanding, and the protection layer has high tensile strength.

Description

technical field [0001] The invention is an improvement to the towing cable for underground mining machines, in particular to a towing cable for underground mining machines with high tensile strength, resistance to frequent bending and movement, and long service life. Background technique [0002] Towing cables for excavators such as iron ore, phosphate rock, and coal mines are used to connect frequently moving excavators in mine roadways to fixed power control cabinets. One end of the cable is fixed to the power control cabinet, and the other end is connected to the mining machine. When the mining machine frequently moves back and forth in the mine roadway, the take-up roller takes up and releases the cable. The towing cable has a high frequency of rewinding and rewinding, more than 100 times a day, which requires the cable to have good tensile and bending properties. The towing cable in the prior art is an ordinary rubber-sheathed soft cable. After the twisted cable core i...

AI Technical Summary

Problems solved by technology

[0009] Furthermore, the cable cores of the existing towing cables for power distribution basically adopt a "3+1" twisted structure of 4 insulated wire cores. In this combination, the outer diameter of the cable is relatively large, which will also affect the bending of the cable. Winding performance, and structural stability for frequent bending

Images