Compound insulator with umbrella-skirt structure

Abstract

A composite insulator with an inner shed structure relates to an insulator used in a high-voltage transmission line. It consists of a mandrel, a shed outside the mandrel and metal ends at both ends of the mandrel. An inner shed is added to the shed, the surface of the inner shed is covered with a metal coating, and the outer shed surrounds the inner shed. The invention adds an inner shed to the shed, increases the metal part of the composite insulator, improves the problem of extremely uneven electric field of the traditional composite insulator; increases the mechanical strength of the shed, and reduces the unknown flashover of the composite insulator; The stress-bearing part of the mandrel is increased to increase the mechanical strength of the mandrel; the external insulation capacity of the insulator is strengthened to form a backup protection for the aging or damage of the outer shed.

Description

technical field [0001] The invention relates to an insulator used in a high-voltage transmission line Background technique [0002] The function of the insulator is to separate the conductors with different potentials, so as not to allow current to pass between the conductors, so as to maintain different potentials between them. Insulators are generally made of insulating materials with extremely high resistance. This material can be used to isolate charged or different potential conductors, so that current can flow in a certain direction. [0003] According to different insulating materials, insulators can be divided into three categories: porcelain insulators, glass insulators and composite insulators. Composite insulators consist of three parts: mandrel, shed and metal end. The shed of the composite insulator is the outer insulating part of the insulator. Its function is to provide the necessary leakage distance and protect the core rod fro...

AI Technical Summary

Problems solved by technology

[0006] The insulator bears the working voltage during normal operation. However, due to various reasons, the voltage in the power system sometimes rises for a short time, that is, an overvoltage occurs. Although the action time of the overvoltage is very short, the overvoltage However, the value greatly exceeds the normal working voltage, so it is easy to cause insulation damage, so the insulator must be able to withstand the effect of overvoltage in addition to the continuous effect of working voltage;

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