Constant power heating cable for rail transit

Abstract

The invention relates to the technical field of cable structures, and provides a constant power heating cable for rail transit, comprising a cable core and a heating wire, wherein the outer surfaces of the cable core and the heating wire are provided with insulating layers, the cable core and the heating wire are integrally coated in an aluminum foil wrapping layer, the outer surface of the aluminum foil wrapping layer is provided with a low-smoke halogen-free flame-retardant strip, a glass fiber filament is arranged between the aluminum foil wrapping layer and the low-smoke halogen-free flame-retardant strip, the outer surface of the low-smoke halogen-free flame retardant strip is provided with a copper woven mesh, the outer surface of the copper woven mesh is provided with a heat sink, the outer surface of the heat sink is provided with a sheath, the sheath comprises an oxygen barrier layer, and the outer surface of the oxygen barrier layer is provided with a waterproof layer. The cable, which overcomes the shortcomings of the prior art and has reasonable design and compact structure, can be heated and kept at a constant temperature when encountering cold weather, which not onlymelts the snow and ice covered on the cable, but also avoids cracking due to low temperature, insect biting and the like, thereby increasing the service life of the cable.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a constant power heating cable for rail transit. Background technique [0002] With the rapid development of my country's economy, the development speed of urban rail transit has also been accelerated, the coverage rate has become wider and wider, and the demand for cables has also increased. [0003] Since the cables are mostly installed outdoors, when encountering cold weather, the surface is easily covered with rain, snow and ice, which not only causes the cables to crack easily in low temperature environments, affects the service life and performance of the cables, but also easily pulls the cables, causing the cables to lose power In the case of a tower or utility pole being toppled. Contents of the invention [0004] (1) Solved technical problems [0005] Aiming at the deficiencies of the prior art, the present invention provides a constant power heating cable for r...

AI Technical Summary

Problems solved by technology

[0003] Since the cables are mostly installed outdoors, when encountering cold weather, the surface is easily covered with rain, snow and ice, which not only causes the cables to crack easily in low temperature environments, affects the service life and performance of the cables, but also easily pulls the cables, causing the cables to lose power When a tower or utility pole is pulled down

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