Explosion-proof arrester

Abstract

The invention provides an explosion-proof arrester. The explosion-proof arrester comprises an outer sleeve, and an insulating core body arranged in the outer sleeve. The insulating core body comprisesan insulating cylinder vertically arranged therein, an upper electrode, a first spring and a number of valve sheets, wherein the upper electrode, the first spring and a number of valve sheets are electrically connected in the insulating cylinder from the top to the bottom. The valve sheets are electrically connected with a cushion block which is located below the valve sheets and pressed on the outer sleeve and a grounding bolt fastened to the cushion block through a second spring. The cushion block is pressed on an inner surface of the outer sleeve through a clamping mechanism at least partially sleeved on the outer sleeve. The joint of the cushion block and the outer sleeve is designed to be a pressure relief part that is first destroyed by high pressure gas present in the arrester. According to the mounting structure provided by the invention, directional drainage of the arrester can be realized to realize the explosion-proof function.

Description

technical field [0001] The invention relates to the field of lightning arresters, in particular to an explosion-proof detachment lightning arrester with directional drainage. Background technique [0002] Surge arrester is an electrical device that can release lightning or overvoltage energy during operation of electrical equipment, protect electrical equipment from instantaneous overvoltage hazards, and can cut off the freewheeling current so as not to cause a short circuit to the ground of the system. The arrester is usually connected between the live wire and the ground, and connected in parallel with the protected equipment. The main function of the arrester is to cut the amplitude of the intrusion flow wave and reduce the overvoltage value of the protected equipment through the function of the parallel discharge gap or the nonlinear resistance, thereby protecting the electrical equipment. Specifically, when the protected equipment is running under the normal working vo...

AI Technical Summary

Problems solved by technology

It is known that this kind of explosion-proof function can be divided into two types: heat-melt and thermal-explosive, but the current lightning arresters are not set to drain and protect the blasting device, which leads to the pressure release of the lightning arrester when a flashover occurs due to aging and other factors. It cannot be oriented to form a crushing explosion, and personal injury accidents often occur due to explosions at the high-pressure end

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