Power cable

Abstract

The invention discloses a power cable comprising a supporting core, single core bodies, and an insulation layer. The supporting core and the single core bodies are disposed in the insulation layer. The supporting core is disposed on the central position of the insulation position, and the number of the single core bodies is more than one. The single core bodies are in a circular arrangement, and are disposed in an annular cavity formed by the supporting core and the insulation layer. Each of the single core bodies comprises a hollow conductive layer, an insulation medium filler, and an insulation medium protection sleeve. The insulation medium filler is disposed in the hollow conductive layer, and the periphery of the insulation medium protection sleeve is provided with wrinkled textures. The outer side of the insulation layer is provided with an inner sheath, the outer side of which is provided with a fireproof layer. The outer side of the fireproof layer is provided with a steel wire armor layer in a single-stranded and twisted way, and the steel wire armor layer adopts galvanized circular steel wires. The outer side of the steel wire armor layer is provided with an outer sheath. The thermal shrinkage problem of the cable is effectively solved, and at the same time, mechanical damages of underground machinery construction and subterranean animals are prevented.

Description

technical field [0001] In particular the invention relates to a power cable. Background technique [0002] Wires and cables refer to wires used for power, communication and related transmission purposes. They are indispensable basic equipment for transmitting electric energy, transmitting information, performing electromagnetic conversion, and manufacturing various motors, electrical appliances, and instruments. At present, the world's resources are increasingly tight, and the materials used for wires are also extremely strict. For electronic materials used in lead frames, terminals, connectors, etc., high strength and high electrical conductivity or thermal conductivity are required as basic characteristics of products. Both sexes. [0003] The continuous and rapid growth of China's economy has provided a huge market space for cable products. The strong temptation of the Chinese market has made the world focus on the Chinese market. In just a few decades of reform and open...

AI Technical Summary

Problems solved by technology

[0004] The current cable sheath is mainly made of PVC material. When the ambient temperature is high, the PVC material sheath will have a relatively large shrinkage. The greater the heat shrinkage, the easier the sheath will be separated from the cable core, thus the poorer the protection of the cable, and the existing cables are extremely vulnerable to damage by external mechanical forces such as excavators or underground animals such as rats during road renovation or re-construction the destruction of

Images