Isolated flexible mineral insulated fireproof cable for nuclear industry

Abstract

The invention discloses an isolation type flexible mineral insulation fireproof cable for the nuclear industry. The cable comprises a hinged copper conductor, a polyester tape and mica tape insulation wrapping layer, a nanometer aluminum base alloy sheath, a double-layer cross-linked polyolefin co-extrusion layer, a filling strip, a flame-retardant tape wrapping layer and a low-smoke halogen-free polyolefin sheath layer. The polyester tape and mica tape insulation wrapping layer wraps the surface of the stranded copper conductor, and the nano aluminum-based alloy sheath wraps the surface of the polyester tape and mica tape insulation wrapping layer. The invention relates to the technical field of fireproof cables. According to the isolation type flexible mineral insulation fireproof cable for the nuclear industry, through the design of the fireproof performance of the cable, the feasible fireproof performance of the grouting component filling layer, the double-layer cross-linked polyolefin co-extrusion layer and the like is provided, and the realizability of the fireproof performance of the cable is effectively achieved; and various fire disasters caused by short circuit of the cable in use are avoided.

Description

technical field [0001] The invention relates to the technical field of fireproof cables, in particular to an isolated flexible mineral insulated fireproof cable for the nuclear industry. Background technique [0002] Since power cables need to pass through building facilities and relatively densely populated areas, and power cables in these areas are more prone to power accidents due to the influence of complex natural factors, in order to prevent power accidents from causing fires, or in the event of fire damage It will not cause power cables to cause secondary accidents, and requires power cables to have reliable fire protection functions. Its function is that when a fire occurs, the fire alarm circuit and important power supply cables can maintain normal and continuous power supply for a specified time under the specified flame temperature, so as to facilitate fire rescue and minimize casualties and economic losses. Therefore, increasing the refractory temperature and pr...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides an isolated flexible mineral insulated fireproof cable for the nuclear industry, which solves the problem of poor high temperature resistance and high temperature flame easy to damage, can not work under extreme conditions

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