Heat insulation protection cable

Abstract

The invention discloses a heat insulation protection cable. The cable comprises an outer protective layer, an inner protective layer and three wire. The outer protective layer is positioned outside the inner protective layer; the three wires are located in the inner protective layer, a flame-retardant layer is fixedly installed on an inner wall of the outer protective layer, a heat insulation layer is fixedly installed on an inner wall of the flame-retardant layer, a waterproof insulation layer is fixedly installed on an inner wall of the heat insulation layer, a fire extinguishing cavity is formed between the waterproof insulation layer and the inner protective layer, and a steel sheet is fixedly installed in the fire extinguishing cavity. By setting the heat insulation layer, a three-layer heat insulation function can be realized outside the wires; the high temperature resistance and the heat insulation performance of a first heat insulation filling layer and a second heat insulationfilling layer are utilized, the high temperature resistance and the heat insulation performance of the cable are greatly improved, the normal work of the cable can be prevented from being influencedby external temperature factors, workers can be prevented from being scalded by too high temperature when the cable works, and the cable has very good safety.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a thermal insulation protection cable. Background technique [0002] The cable is usually a rope-like cable twisted by several or several groups of wires (at least two in each group). Each group of wires is insulated from each other and is often twisted around a center. Insulated covering layer, the cable has the characteristics of internal energization and external insulation. The wire and cable industry is the second largest industry in China after the automobile industry. The product variety satisfaction rate and domestic market share both exceed 90%. Worldwide, China's wire and cable output has surpassed that of the United States, becoming the world's largest producer of wire and cable. With the rapid development of China's wire and cable industry, the number of new enterprises has been increasing, and the overall technical level of the industry has been greatly improved. ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing cables are mainly composed of PVC plastic particle processing sheath insulation and copper wire cores of various specifications. The conductors are often covered with PVC insulation. The thermal conductivity of commonly used PVC insulation is about 0.14W. / mk, the heat insulation effect is average. In the long-term high-temperature environment of the power distribution room, the temperature of the cable will often increase, which will affect the service life of the cable. In addition, when there is a short circuit, the cable will also spontaneously ignite, which will cause a fire.

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