Movable switch knife

Abstract

The invention discloses a movable switch knife, relating to the manufacturing technical field of middle-high voltage electrical appliances. The movable switch knife comprises a left movable knife voltage balancing element, a right movable knife voltage balancing element, a left movable knife, a right movable knife, a movable knife supporting element, a movable knife pin, a movable knife connecting lever, a connecting bolt, a fastening nut and a disk spring, wherein the left and right movable knife voltage balancing elements are in hemispherical structures and have a plurality of holes, a plurality of holes in one-to-one correspondence to the left and right movable knife voltage balancing elements are formed in the left movable knife and the right movable knife, the movable knife supporting element is installed between the left movable knife and the right movable knife, and the movable knife connecting lever is used for connecting the left movable knife with the right movable knife through the movable knife pin; and the connecting bolt, the fastening nut and the disk spring are arranged in the left and right movable knife voltage balancing elements. The disk spring is composed of a plurality of pieces; and the left and right movable knife voltage balancing elements are riveted into a whole with the left movable knife and the right movable knife. The movable switch knife can be used for solving the problems of liable insulation flashover, bad insulation strength, poor environmental adaptability and severe partial discharge.

Description

technical field [0001] The invention relates to the technical field of manufacturing medium and high voltage electrical appliances, in particular to a switch movable knife that can be used for load switches, isolating switches and grounding switches. Background technique [0002] In the field of medium-voltage switchgear, the isolation and grounding switch in the switchgear is generally in the form of a rotary knife switch. In the SF6 gas-insulated ring main unit, the knife switch can also be used as a load switch with an appropriate arc suppression device. The knife switch The form of the switch is widely adopted in the industry because of its simple structure and low cost. Although the structure of the switching knife of the medium-voltage products on the market is slightly different, its structure is similar. It basically includes a moving knife, a support Parts, pressure springs, bolts, nuts, because the bolts, nuts and pressure springs have sharp corners that are unavoi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a switch movable knife, which can solve the problems of easy insulation flash, poor insulation strength, poor environmental adaptability, and serious partial discharge

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