Arc extinguishing and lightning protection insulator

Abstract

The invention discloses an arc extinguishing and lightning protection insulator which comprises a foot ball, an insulator body, an arc extinguishing channel, a plurality of skirt hems and an arc blocking skirt hem, wherein the foot ball is fixedly connected with the insulator body; an arc striking electrode (11) is arranged at the top of the insulator body (1); the arc striking electrode is embedded in the foot ball; a cap groove is formed in the bottom of the insulator body; the arc extinguishing channel is spirally formed in the surface of the insulator body; the skirt hems are fixedly arranged on the insulator body; an arc blocking fence is arranged in the arc blocking skirt hem; the diameters of the skirt hems and the arc blocking skirt hem are 300 to 450 mm; arc guiding metal balls are fixedly arranged in the arc extinguishing channel at a certain distance; and in an inner cavity of the arc extinguishing channel, the arc striking electrode is connected with the first arc guiding metal ball in the arc extinguishing channel through a lead wire, and the last arc guiding metal ball is connected with the bottom of the arc extinguishing channel through the cap groove.

Description

technical field [0001] The invention relates to the technical field of arc extinguishing and lightning protection for insulators, in particular to an arc extinguishing and lightning protection insulator. Background technique [0002] Insulators are necessary on high-voltage and ultra-high-voltage power transmission lines. Their function is to separate conductors with different potentials and prevent current from passing between conductors to maintain different potentials between them. Insulators are generally made of insulating materials with extremely high resistance. This material can be used to isolate charged or different potential conductors, so that current can flow in a certain direction. According to different insulating materials, insulators can be divided into three categories: porcelain insulators, glass insulators and composite insulators. At the earliest, there were only porcelain and glass insulators. The overall mechanical and electrical properties of porcela...

AI Technical Summary

Problems solved by technology

Although the addition of a parallel arc extinguishing device solves the problem of lightning flashover, the number of arc extinguishing is limited, and regular maintenance is required, which increases the operating cost of the transmission line, and the arc extinguishing device increases the cost of the transmission line. Due to its own weight, it is necessary to further enhance the load-bearing capacity of the tower

[0004] When encountering severe weather with thunderstorms, the creepage distance of the above insulators is small, and the arc is easy to form a symmetrical distribution with the arc extinguishing channel, which greatly reduces the arc extinguishing effect and arc extinguishing efficiency of the insulator

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