Power cable

Abstract

The invention discloses a power cable. The power cable comprises a supporting core, single-core bodies and an insulating layer, wherein the supporting core and the single-core bodies are located in the insulating layer, the supporting core is located in the center of the insulating layer, the number of the single-core bodies is larger than one, and the single-core bodies are circumferentially distributed in layers in an annular cavity formed by the supporting core and the insulating layer; each single-core body comprises a hollow conducting layer, insulating medium filler and an insulating medium protective sleeve, the insulating medium filler is arranged in the hollow conducting layer, wrinkle-shaped texture is arranged on the periphery of the insulating medium protective sleeve, an inner sheath is arranged outside the insulating layer, a refractory layer is arranged outside the inner sheath, a steel wire armoring layer is arranged outside the refractory layer in a single-strand spirally twisted mode and is made of round galvanized steel wires, and an outer sheath is arranged outside the steel wire armoring layer. According to the power cable, the thermal shrinkage problem of the cable can be effectively solved, and meanwhile mechanical damage during underground construction and damage of underground animals can be 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

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