PVC insulated sheathed control cable

Abstract

The invention belongs to the technical field of electric power facilities, and particularly relates to a polyvinyl chloride insulation sheath control cable. The cable comprises conductors, insulatinglayers and a shielding layer, wherein the insulating layer wraps the surface of the conductor to form a wire core; the outer side of the shielding layer is coated with an inner sheath; the outer sideof the inner sheath is sleeved with an outer sheath; the surface of the side, which is away from the shielding layer, of the inner sheath is fixedly connected with uniformly distributed supporting bumps; a contraction bump is mounted between every two adjacent supporting bumps; first grooves which are uniformly distributed are formed in the surfaces of the supporting bumps; the first grooves are filled with silicone rubber; the surface of the side, which is close to the shielding layer, of the inner sheath is fixedly connected with uniformly arranged heat conduction graphite sheets; and the surface of the side, which is close to the inner sheath, of the heat conduction graphite sheet is fixedly connected with heat conduction wires which are uniformly distributed. According to the invention, heat emitted by the wire cores is transmitted to the contraction bumps and the silicone rubber through the heat conduction silica gel, the heat conduction graphite sheets and the heat conduction wires, so that uniform grooves are formed in the surface of the outer sheath, and the heat dissipation speed of the cable is increased.

Description

technical field [0001] The invention belongs to the technical field of power facilities, in particular to a polyvinyl chloride insulated and sheathed control cable. Background technique [0002] With the gradual acceleration of the urbanization process, urban planning is becoming more and more modernized. In the process of urban construction, cables need to have the characteristics of high strength, good rigidity and toughness, and fast heat dissipation, especially for control cables. , The cable core has been exposed to a high-temperature working environment of 75°C or 85°C for a long time. Excessively high temperature will accelerate the aging rate of the cable, thereby degrading the performance of the cable and eventually reducing the service life of the cable. For details, please refer to the journal Underground High-Voltage Power Cable Temperature Field Numerical Computation, Zhou Xiaohu, Northeast Electric Power University, 2008(03). [0003] A high heat dissipation c...

AI Technical Summary

Problems solved by technology

[0005] In order to make up for the deficiencies of the existing technology and solve the problem that the existing control cable is exposed to high temperature for a long time and the heat dissipation is not timely, which leads to the accelerated aging rate and shortened life of the cable, the PVC insulated sheathed control cable proposed by the present invention

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