Multi-stage telescopic type isolating switch and moving end assembly thereof

Abstract

The invention relates to a multi-stage telescopic type isolating switch and a moving end assembly thereof. The moving end assembly comprises a cylinder body and more than three stages of pistons, wherein the more than three stages of pistons include a first-stage piston, a second-stage piston and a last-stage piston; the first-stage piston is movably arranged on the cylinder body in a guide manner; the second-stage piston is movably arranged on the first-stage piston in a guide manner; the last-stage piston is provided with a moving contact; and reinforcing rods parallel to the axes of the pistons are fixed on at least two stages of pistons, the reinforcing rods are movably arranged on the cylinder body, the other stages of pistons or the reinforcing rods of the other stages of pistons along the direction parallel to the axes of the pistons in a guide manner. Due to the arrangement of the reinforcing rods, the pistons and the reinforcing rods can form a frame structure; the stability of the pistons is greatly improved; the friction force on the pistons can be reduced to reduce abrasion; an accurate movement locus of the moving contact is ensured; an offset is avoided; the structure is compact; the arrangement of other parts is not affected; the multi-stage telescopic type isolating switch is low in cost and easy to implement; and the stability of the telescopic type isolating switch with a relatively long breaking-closing travel can be effectively improved.

Description

technical field [0001] The invention relates to a multi-stage retractable isolating switch and its moving end assembly. Background technique [0002] The vertical opening and closing telescopic isolating switch has been widely used in places such as power transmission and power testing. Existing retractable isolating switches, such as a multi-section pneumatic isolating switch disclosed in a Chinese patent with the authorized announcement number CN 103681077 B, include a static end assembly and a moving end assembly, the static end assembly includes a static contact, and the moving end assembly includes a telescopic The telescopic cylinder is a multi-section cylinder, and any section of the multi-section cylinder includes a piston rod to form a section of piston. The whole cylinder includes a first-stage piston that is guided and moved on the cylinder body, and a first-stage piston that is guided and moved. The secondary piston on the piston and the final piston with moving...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-stage telescopic isolating switch and its moving end assembly to solve the problem that the position of the moving contact is easily shifted in the prior art

Images