Intelligent fireproof medium-voltage cable and preparation method thereof

Abstract

The invention discloses an intelligent fireproof medium-voltage cable and a preparation method thereof. The intelligent fireproof medium-voltage cable comprises a main cable body, a temperature measurement layer and a sheath which are sequentially arranged from inside to outside; the main cable body comprises an insulating cable, a cooling metal pipe, a filler and a flame-retardant buffer layer which are sequentially arranged from inside to outside, the insulating cable is formed by tightly wrapping a conductor, a composite insulating layer, a semi-conductive buffer layer and a metal shieldinglayer in sequence from inside to outside, and the cooling metal pipe is arranged on the periphery of the metal shielding layer; the temperature measurement layer comprises a heat insulation layer, temperature measurement optical fiber units, a cooling metal tube and a buffer layer which are sequentially coated from inside to outside, each temperature measurement optical fiber unit comprises a temperature measurement optical fiber and a cooling metal tube, the plurality of temperature measurement optical fiber units are uniformly wrapped between the heat insulation layer and the buffer layer,and the temperature measurement layer is located between the main cable body and the sheath; and the sheath comprises a metal sheath and an outer sheath which are sequentially coated from inside to outside. The temperature measurement optical fiber units independently arranged in the temperature measurement layer are convenient to install and maintain, and the false alarm rate of the uniformly distributed temperature measurement optical fiber units is low.

Description

technical field [0001] The invention relates to the technical field of fireproof medium-voltage cables, in particular to an intelligent fireproof medium-voltage cable and a preparation method thereof. Background technique [0002] According to statistics, it is found that more than 60% of all kinds of electrical fires in our country are caused by wires and cables. Among them, medium-voltage cables are widely laid in various places in cities, and medium-voltage cables play an important role in power transportation. Therefore, temperature monitoring and fire performance of medium voltage cables are important indicators of medium voltage cables. [0003] The Chinese utility model with the notification number CN209199657U discloses a temperature-measuring medium-voltage cross-linked power cable, which includes three medium-voltage cross-linked polyethylene insulated wire cores, which are sequentially coated on the three medium-voltage cross-linked polyethylene insulated wires ...

AI Technical Summary

Problems solved by technology

[0004] The applicant found that the above-mentioned temperature-measuring medium-voltage XLPE power cable has only one temperature-measuring optical fiber unit installed between the three medium-voltage XLPE insulated wire cores, and the distance between the three medium-voltage XLPE insulated wire cores when energized The temperature of the part is easy to rise, and the temperature measurement fiber unit is easy to be damaged. Only one temperature measurement fiber unit is prone to false alarms and affects the normal use of the cable.

On the other hand, the fire and heat resistance of the cable is poor

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