Rod-shaped multi-gap arc extinguishing and lightning protection device based on double hemisphere T-shaped ceramic discharge tube

Abstract

The invention discloses a rod-shaped multi-gap arc extinguishing lightning protection device based on a double-hemisphere T-shaped ceramic discharge tube, which relates to an arc extinguishing lightning protection device applied to overhead lines above 10KV level. The invention comprises a spherical electrode, an insulating umbrella tray, an internal insulating layer, a double-hemisphere T-shapedceramic discharge tube and a bolt electrode. 30 to 40 double hemisphere T-shape ceramic discharge tubes and bolt electrode are sequentially connected to form a rod-type integral body; An internal insulation layer is uniformly wrapped on the whole rod type, and an insulation umbrella tray is arranged on the external insulation layer of the internal insulation layer. The lightning current is elongated, elongated and ejected to extinguish the electric arc, thereby avoiding the occurrence of inter-phase short circuit fault and reducing the counterattack probability caused by lightning strike lightning protection wire; and the lightning current is elongated, elongated and ejected. Strong ability to withstand lightning surge, large flow capacity, high security; Discharge gap size consistency isgood, impulse discharge, power frequency discharge is stable; The utility model has the advantages of simple structure, high reliability and easy mass production.

Description

technical field [0001] The invention relates to an arc extinguishing and lightning protection device applied to overhead lines above 10KV, in particular to a rod-shaped multi-gap arc extinguishing and lightning protection device based on double hemispherical T-shaped ceramic discharge tubes. Background technique [0002] Lightning is an important factor affecting the safety of transmission lines. It has long occupied the first place in line fault tripping. It is a natural process of atmospheric activity and has not been controlled so far. Lightning strikes will cause overvoltage, which may cause damage to insulators and transmission lines; cause flashover discharge of insulators. In this regard, the power sector generally adopts the installation of line lightning arresters on overhead lines to achieve protection. At present, the line arresters used on overhead lines mainly include: zinc oxide arresters, protection gap arresters and new multi-gap arresters. Zinc oxide arres...

AI Technical Summary

Problems solved by technology

Zinc oxide arresters are susceptible to moisture, aging, high failure rate, and difficult to repair and maintain; protective gap arresters cannot extinguish the arc after lightning protection action, and cannot effectively solve the tripping and disconnection accidents caused by lightning strikes; new multi-gap arresters mostly use a single Metal spherical electrodes, metal spherical electrodes are ablated by power frequency arc for many times and are easy to melt and change, resulting in short connection between gaps, complex structure, difficult production, poor product consistency, unstable power frequency discharge and impact discharge

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