Medium-voltage flame-retardant power cable

Abstract

The invention discloses a medium-voltage flame-retardant power cable. The power cable comprises conductors, main cable cores, auxiliary cable cores and a middle cable core. Insulating layers are wrapped on the conductors in an extruding mode to form insulating cable cores, a fire-resistant oxygen isolating layer made of ceramic silicone rubber materials is wrapped on every three corresponding insulating cable cores in a lapping mode after the three insulating cable cores are stranded together, and outer semiconducting shielding layers are arranged outside the fire-resistant oxygen isolating layers to form the main cable cores. Each auxiliary cable core is formed by wrapping a fire-resistant oxygen isolating layer made of ceramic silicone rubber materials on two insulating cable cores in a lapping mode. The middle cable core is an insulating cable core. A polyurethane wrapping tape layer is wrapped on a cable core in a lapping mode after the cable core is formed by the main cable cores, the auxiliary cable cores and the middle cable core, and an outer semiconducting master shielding layer and an outer protection layer made of low-smoke zero-halogen flame-retardant polyolefin materials are sequentially arranged outside the polyurethane wrapping tape layer. Four control cable cores are arranged in the polyurethane wrapping tape layer. The power cable has high environment friendliness, produces less smoke and does not produce harmful hydracid substances when burnt and further has high fire resistance.

Description

technical field [0001] The invention belongs to the field of wires and cables, and relates to a medium-voltage flame-retardant power cable. Background technique [0002] The occurrence of fire accidents will cause tragic loss of people's lives and property. How to ensure unimpeded power and communication within a certain period of time in the event of a fire, and maximize the precious rescue time to reduce casualties and The loss of life and property is a topic that people have been paying attention to. At present, medium-voltage fire-resistant power cables are being actively researched and developed at home and abroad. After several years of research in China, there is still no ideal sample. Contents of the invention [0003] In order to overcome the defects of the prior art, the purpose of the present invention is to provide a medium-voltage flame-retardant power cable with high environmental protection performance, less smoke and no harmful halogen acid substances duri...

AI Technical Summary

Problems solved by technology

At present, medium-voltage fire-resistant power cables at home and abroad are actively researching and developing. After several years of research in China, there is no ideal sample yet.

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