A fire-resistant control cable

Abstract

The invention relates to a fireproof control cable which comprises a sheath, an inner protective layer, outer insulating layers, outer conductors, radial interlayers, a main fireproof layer, an inner insulating layer and an inner conductor, wherein the axis of the main fireproof layer coincides with the axis of the sheath, the inner insulating layer is fixed in the main fireproof layer, the radial interlayers are evenly and symmetrically installed in an annular space formed by the main fireproof layer and the inner protective layer, and the outer insulating layers are evenly and symmetrically distributed in the fan-shaped space formed by the radial partition interlayers, the inner protective layer and the main fireproof layer. The fireproof control cable has the advantages of being reasonable in structural design, convenient to machine and high in durability. According to the fireproof control cable, mutual combustion is avoided, electrifying time can be guaranteed and prolonged when the cable burns in a high-temperature and flame environment, and therefore, control requirements in an emergency are met, the tenacity of the cable is improved, cable surface breakage or internal conductor breakage is avoided when the cable is bent or pulled, and the service life of the cable is prolonged.

Description

Technical field [0001] The invention relates to a cable, specifically a fire-resistant control cable. Background technique [0002] With the rapid development of China's wire and cable industry, the number of new companies has continued to rise, and the overall technical level of the industry has been greatly improved. There are many kinds of wire and cable products. Among them, fire-resistant control cables are used for the control, monitoring, measurement and protection circuits of emergency facilities such as AC power frequency voltage 0.6 / 1kV and below, fire alarm and fire equipment, emergency channel transportation, and lighting. It is suitable for important places requiring high safety, such as subways, shopping malls, high-rise buildings, and power stations. [0003] However, the traditional fire-resistant control cable is intertwined with its internal insulated wires and the structure design is unreasonable, resulting in a low fire-resistant temperature. Once a fire occurs...

AI Technical Summary

Problems solved by technology

[0003] However, the traditional fire-resistant control cables are intertwined with their own internal insulation wires, and the structural design is unreasonable, resulting in a low fire-resistant temperature. Once a fire occurs, it will burn in high temperature and flames, which can ensure a short power-on time and cannot ensure emergency situations. Control requirements

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