Spring operating mechanism buffer for circuit breaker

Abstract

The invention discloses a spring operating mechanism buffer for a circuit breaker. The spring operating mechanism buffer comprises an inner cylinder body and an outer cylinder body which are in sleeved mounting in a clearance manner, wherein a clearance cavity is formed by an outer circumference face of the inner cylinder body and an inner circumference face of the outer cylinder body; a piston for driving hydraulic oil to flow between an inner cavity of the inner cylinder body and the clearance cavity is assembled in the inner cylinder body in a reciprocating motion manner; a through-flow hole for communicating the inner cavity of the inner cylinder body with the clearance cavity and capable of satisfying switch-off performance of the circuit breaker is formed in the inner cylinder body; an acceleration channel is arranged in the outer cylinder body; one end of the acceleration channel is communicated with the inner cavity of the inner cylinder body; the other end of the acceleration channel is communicated with the clearance cavity; and a check valve structure for controlling breakover of the acceleration channel in a switch-on process of the circuit breaker and cutoff of the acceleration channel in a switch-off process of the circuit breaker is arranged on the acceleration channel. The buffer can effectively solve the problem of low switch-on speed in a test process of the circuit breaker, does not influence technical parameters in the switch-off process of the circuit breaker, and improves reliability and stability of circuit breaker products.

Description

technical field [0001] The invention belongs to the technical field of a spring operating mechanism for a high-voltage circuit breaker, and in particular relates to a spring operating mechanism buffer for a circuit breaker. Background technique [0002] The opening and closing speed of the high-voltage circuit breaker is relatively high, while the movement stroke of the contact is relatively small. In order to stop the moving parts with high speed within a short stroke, buffers must be used to absorb the kinetic energy of the moving parts, thereby preventing some parts in the circuit breaker from being damaged due to huge impacts. [0003] For example, an oil buffer for a circuit breaker is disclosed in the Chinese utility model patent specification whose authorized announcement number is CN201315270Y. The outer cylinder of the oil buffer is fitted with an inner cylinder, and the reciprocating movement of the inner cylinder is equipped with a piston. The piston is equipped ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a spring operating mechanism buffer for a circuit breaker that can increase the closing speed during the closing process of the circuit breaker without changing the technical parameters of the opening process, so as to solve the problem of directly adjusting the size of the flow hole in the prior art. The technical problems that will affect the technical parameters of the circuit breaker opening process when the position relationship

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