High-voltage dragging rubber-sheathed flexible cable for mine

Abstract

The invention discloses a high-voltage dragging rubber-sheathed flexible cable for mine. The high-voltage dragging rubber jacketed flexible cable comprises a cable conductor which is formed by a plurality of power wire cores and a plurality of pilot wire cores through twisting, an inner sheath is extruded outside the cable conductor, an outer sheath is extruded at the outermost layer of the cable, and a reinforcement layer is woven between the inner sheath and the outer sheath. Each of the three power wire cores is composed of a power conductor and a semi-conductive inner shielding layer, a power wire core insulating layer, a semi-conductive outer shielding layer and a metal shielding layer which are extruded outside the monitoring conductor. By means of the high-voltage dragging rubber-sheathed flexible cable, performances of sheathes are improved, a flexible reinforcement structure is adopted, ground pilot wire cores and the reinforcement layer are added, so that not only the resistance to abrasion and corrosion and the anti-dragging tensile strength of the cable are improved, but also the safe use performance of the cable is added, and the deflection performance of the cable is not affected simultaneously.

Description

[0001] technical field [0002] The invention relates to the field of electric wires and cables, in particular to a mine-used high-voltage trailing rubber-sheathed flexible cable. Background technique [0003] Existing mine towing moving cables generally have three-core, four-core, five-core or six-core structures. Three-core cable core insulation is co-extruded with three layers, and the braided metal shielding layer doubles as the ground wire after extruding insulation. ; This type of mobile towing cable is directly extruded with a single-layer sheath without filling when it is cabled. The cable has no reinforcement layer and generally does not have a monitoring core. [0004] Existing mine towing mobile rubber cables are generally used on coal mine electric shovels, coal shearers, dredgers, bucket machines, conveyor belts and mobile power distribution devices. In the normal working environment, the moving speed is relatively slow, and the cable is collected and placed o...

AI Technical Summary

Problems solved by technology

Three-core cable core insulation is co-extruded with three layers, and the braided metal shielding layer doubles as the ground wire after extruding insulation. ; This type of mobile dragging cable is directly extruded with a single-layer sheath without filling, and the cable has no reinforcement layer, and generally there is no monitoring core

[0004] Existing mine towing mobile rubber cables are generally used on coal mine electric shovels, coal shearers, dredgers, bucket machines, conveyor belts and mobile power distribution devices. In a normal working environment, the moving speed is relatively slow, and the cable is collected and placed on the reel with a large bending radius. The cable does not need to bear the rolling and pulling force of the equipment, but only needs to bear part of its own weight.

[0005] With the continuous emergence of high-voltage and high-power heavy equipment in mines, the existing mobile cables can no longer meet the needs of the equipment

Such high-voltage, high-power equipment is often used in electric shovels, dredgers, buckets and other equipment used in open-pit coal mines. However, the existing cable sheath material is common chlorinated polyethylene or materials with equivalent properties. This sheath material is likely to cause wear and corrosion of the sheath layer in this environment for a long time, thereby affecting the safe service life of the cable; at the same time, Due to the limitation of large-scale construction machinery and equipment, such cables need to be dragged on the construction ground for a long time, and even need to withstand the rolling of equipment. The existing high-voltage mobile rubber cable core is easy to twist and break the core, and the single-layer sheath layer is easy to bulge , the service life is generally only half a year, which increases the user's use cost; secondly, the existing mine towed mobile cable does not have a grounding detection core. Insulation damage is prone to occur in the middle of the cable. If there is no grounding detection core and no reinforcement layer structure, when the main core of the cable is damaged, it cannot be fed back to the monitoring equipment in time, which will easily cause damage to the equipment and may even cause personal injury.

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