Mining cable with water-blocking isolation layer

Abstract

The invention discloses a mining cable with a water-blocking isolation layer, and the cable consists of a cable core, a conductor shielding layer, an insulating layer, an insulating shielding layer, awrapping tape and an outer sheath from the inside to the outside. The cable is characterized in that the insulating shielding layer is formed by the combination of a nonmetal semiconductive layer anda metal layer from the inside to the outside; the nonmetal semiconductive layer employs an extruded crosslinked sticking-type semiconductive material, and the metal layer employs a copper wire for shielding; the insulating layer is made of a crosslinked polyethylene material or a thermoplastic elastomer material; the outer sheath is a black sheath which is made of a thermoplastic elastomer with the cold resistance of -50 DEG C. The periphery of the wrapping tape is provided with a water-blocking isolation layer, and the periphery of the water-blocking isolation layer is provided with an armored part which is made of a non-ferromagnetic material. Because of the adding of the water-blocking isolation layer, the radial water-blocking performance of the cable is improved.

Description

technical field [0001] The invention relates to a cable, in particular to a cable for coal mines. Background technique [0002] Wires and cables are widely used in metallurgy, mining, construction, petrochemical, aerospace and other projects. Due to the vast territory of our country, the extreme temperature in winter in the northern region can reach minus 45°C. According to the current IEC standard, that is, the national standard GB12706-2008, the plastic insulated power cable is made of cross-linked polyethylene and polyvinyl chloride, and the sheath is polyvinyl chloride. The standard clearly stipulates that the low temperature performance test temperature of PVC insulation and sheath is minus 15°C, and the ambient temperature of PVC insulated or PVC sheathed cables should not be lower than 0°C during installation. The standard plastic insulated wires and cables are not suitable for winter construction and laying in Northeast my country, Inner Mongolia, Tibet and Xinjiang....

AI Technical Summary

Problems solved by technology

The standard clearly stipulates that the low temperature performance test temperature of PVC insulation and sheath is minus 15°C, and the ambient temperature of PVC insulated or PVC sheathed cables should not be lower than 0°C during installation. The standard plastic insulated wires and cables are not suitable for winter construction and laying in Northeast my country, Inner Mongolia, Tibet and Xinjiang.

The cables also need to be stored in a warehouse with heating, otherwise the cable sheath will crack under severe cold and harsh environment conditions, making the cables unusable

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