Replacement-free bar-shaped suspension type line composite insulator

Abstract

The invention relates to a replacement-free bar-shaped suspension type line composite insulator, wherein an upper accessory system is arranged on a grounding electrode of the insulator, a lower accessory system is arranged on a conductive electrode of the insulator, and at least one intermediate accessory system is arranged on an insulating part between the grounding electrode and the conductive electrode of the insulator; the upper accessory system is composed of an upper insulating part and an upper conductive part, and the upper insulating part is in close contact with the upper conductive part; the lower accessory system is composed of a lower insulating part and a lower conductive part, and the lower insulating part is in close contact with the lower conductive part; and the intermediate accessory system is made of an insulating material. According to the invention, most of the grounding electrode and the conductive electrode are isolated from the external air, thereby eliminating the corona discharge probability of the electrodes and improving the initial corona voltage and the dry flashover voltage; the ultraviolet rays and the rain water are shielded, so the wet flashover voltage is improved, and the pollution flashover probability is reduced; and the insulating parts of the upper accessory system, the lower accessory system and the intermediate accessory system can replace the sheds of the original insulator. By adopting the invention, as long as the mechanical strength of the insulator does not change, the insulator does not need to be replaced.

Description

technical field [0001] The invention relates to a replacement-free rod-shaped suspension line composite insulator. Background technique [0002] Line insulators are insulating parts used to fix wires in power transmission and distribution lines. Line insulators are divided into three types according to their structures: needle type, suspension type and cross arm. [0003] With the development of the economy, the pollution problem has become a serious problem accompanied by the rapid economic growth. Operating experience proves that pollution flashover of insulators is one of the main reasons for line outage under normal operating conditions. How to improve the anti-pollution flashover capability of transmission lines has become a big problem faced by power companies at home and abroad. [0004] In recent decades, power systems at home and abroad have widely used composite materials to replace traditional porcelain and glass materials to make insulators. Composite materials...

AI Technical Summary

Problems solved by technology

The strong electric field will cause corona discharge on the surface of the metal fittings, accelerate the aging of the outer insulating material, and then affect the operating characteristics of the insulating material, posing a serious threat to the safe operation of electricity

[0007] During the operation of the rod-shaped suspension line composite insulator with two-element structure, the silicone rubber material of the composite insulator will show different degrees of aging phenomenon, and some deterioration phenomena will pose a threat to the safe operation of the insulator after a long period of operation. Therefore, many power companies stipulate that after the composite insulator has been in operation for more than ten years, the insulator must be replaced, otherwise it may cause serious consequences

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