Measuring device

Abstract

The invention belongs to the technical field of circuit breakers, and discloses a measuring device which is used for measuring the deformation quantity of an elastic piece, the two ends of the elastic piece are connected to two mounting pieces respectively, at least one mounting piece can compress the elastic piece, and the measuring device comprises two connecting pieces, a displacement sensor and an adjusting assembly. The two connecting pieces are respectively used for connecting the two mounting pieces; the displacement sensor comprises a displacement sensor body and a measuring rod capable of sliding relative to the displacement sensor body; the number of the adjusting assemblies is two, each adjusting assembly comprises a connecting rod and a sleeve, the two connecting rods are connected to the two connecting pieces respectively, the two connecting rods penetrate through the two sleeves respectively in a sliding mode, one sleeve is connected to the displacement sensor body, and the other sleeve is connected to the measuring rod. The sliding direction of the measuring rod relative to the displacement sensor body and the sliding direction of the connecting rod relative to the sleeve form an included angle, so that the direction of the displacement sensor can be adjusted, the sliding direction of the measuring rod is consistent with the compression direction of the elastic piece, and the measuring error is reduced.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a measuring device. Background technique [0002] Circuit breakers are commonly used equipment in power facilities. Overtravel refers to the stroke that the compression spring continues to compress after the contacts of the vacuum circuit breaker are in full contact. Overtravel is an important parameter to ensure the contact pressure of contacts, and the measurement of overtravel is an essential step in the process of power operation and maintenance. [0003] At present, vernier calipers are mostly used for the measurement of overtravel. By manually operating the vernier calipers, the length of the compression spring of the circuit breaker when it is opened and closed is measured respectively. Get the value of overtravel. However, the problem with this solution is that since the opening spring in the circuit breaker is in a stretched state when the circuit breaker is i...

AI Technical Summary

Problems solved by technology

However, the problem with this solution is that since the opening spring in the circuit breaker is in a stretched state when the circuit breaker is in the closed state, when a mechanical failure or human misoperation occurs or the circuit breaker element is accidentally touched, the opening spring will Under the action of its own elastic force, the circuit breaker is opened, causing the measurement personnel to be injured; in addition, due to the narrow operating space in the circuit breaker, the measurement personnel need to put their hands into the circuit breaker to operate, which will cause the measurement operation to be inconvenient. Will increase the measurement error, resulting in a decrease in measurement accuracy

[0004] In order to solve the above problems, the existing technology uses a displacement sensor to measure the compression of the compression spring to measure the overtravel of the circuit breaker. However, since the displacement sensor is connected to the fixed position on both sides of the elastic member, when the measurement environment changes, It may cause the connection position of the measuring device on both sides of the elastic member to change, which will cause the measuring device to be unable to be installed at the original connection position, or the expansion and contraction direction of the displacement sensor is not parallel to the expansion and contraction direction of the elastic member, resulting in inaccurate measurement results. precise

Images