Multi-metal lightning stroke overvoltage and overcurrent releaser

Abstract

The invention discloses a multi-metal lightning stroke overvoltage and overcurrent releaser, and belongs to the field of power tower lightning arrester manufacturing. A circular hoop consists of two semicircle hoops with the same shape, and two ends of each semicircle hoop are respectively provided with an ear plate through a bolt. Each semicircle hoop is uniformly provided with a plurality of crimping pieces in a welding manner. The crimping pieces formed by the stamping of metal sheets respectively consist of an inverted U-shaped piece, a left ear piece, and a right ear piece. Moreover, each crimping piece is provided with a bent metal circular strip in a plugging manner, wherein the bent metal circular strip is respectively fixed with arc-shaped wedges pressed in the left and right gaps of the corresponding crimping piece. The releaser is especially suitable for the reconstruction of a lightning-protection function of an old pole, cam effectively reduce the grounding resistance under the condition that the stability of the base of the old pole is not affected, and improves the lightning-protection reliability.

Description

technical field [0001] The invention relates to a lightning release device, in particular to a lightning release device for a power tower that has been put into operation and has a relatively large grounding resistance. Background technique [0002] 1. The influence of grounding resistance on lightning release [0003] We know that lightning is a natural law and is not yet controllable. Under the long-term research and exploration of the power system, preventive measures such as lightning rods, lightning arresters, and avoidance routes have been widely used. However, these devices have the function of attracting and blocking the lightning current and voltage, but the self-release and anti-discharge functions to the air are very poor. For this reason, according to the long-term operation experience, the way of leading the lightning current to the earth for discharge is generally adopted. [0004] The process of releasing the lightning current and voltage to the ground is al...

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Problems solved by technology

[0010] 3) The grounding wire itself is corroded or even broken

However, there are situations where the grounding resistance value is as high as dozens or hundreds of ohms, exceeding the specification requirements of 10Ω. This is relatively easy to handle in the newly installed towers, which can be constructed at the same time; but for some old electric piles that have been built and put into operation for a long time, it is even more difficult to handle. Because it is not only to reduce the resistance, but also to consider not affecting the stability of the original tower base and the convenience of transportation, etc.

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