Direct-current disc type suspension bell-shaped porcelain composite insulator dedicated to 210kN

Abstract

The invention discloses a direct-current disc type suspension bell-shaped porcelain composite insulator dedicated to 210kN. The direct-current disc type suspension bell-shaped porcelain composite insulator includes a steel cap, a porcelain umbrella plate, a groove and a steel pin, wherein the diameter of the insulator is 330mm, the creep distance of the insulator is 500mm, and the porcelain umbrella plate and the groove are comprehensively covered with a silicon sulfide rubber umbrella sleeve which is 6mm thick. Through forming the outer insulating component which is 6mm thick and formed by sulphuration on the surface of the insulator, the steep wave resistance of the direct-current disc type suspension bell-shaped porcelain composite insulator is greatly improved, the porcelain composite insulator can pass 2.85-time negative lightning impulse voltage check by an amplitude method; through the determination of an artificial pollution test, the disc type suspension bell-shaped porcelain composite insulator has good pollution resistance under the condition of IV-level pollution; under the conditions of the same salt density and dust density, the pollution flashover resistance of the disc type suspension bell-shaped porcelain composite insulator is at least 1.8 times that of a disc type suspension bell-shaped porcelain insulator.

Description

technical field [0001] The invention belongs to the technical field of disc-shaped suspension insulators, and in particular relates to a DC disc-shaped suspension bell jar-shaped porcelain composite insulator specially used for 210kN. Background technique [0002] At present, when the transmission lines of many provinces and cities in China, especially the northern provinces and cities, encounter weather conditions such as freezing rain and snowmelt in winter, the vertically suspended insulator strings will be bridged by icicles, and the insulation strength of the bridged insulator strings will be greatly reduced. , prone to flashover accidents. [0003] In order to prevent insulator strings from being bridged by ice skating, people have developed multiple directions of insulator technology. Among them, improving the wave-shaking tolerance and pollution resistance of insulators has become a main direction in people's research. Contents of the invention [0004] The purpos...

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Problems solved by technology

[0002] At present, when the transmission lines of many provinces and cities in China, especially the northern provinces and cities, encounter weather conditions such as freezing rain and snowmelt in winter, the vertically suspended insulator strings will be bridged by ice skating, and the insulation strength of the bridged insulator strings will be greatly reduced. , prone to flashover accidents

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