Occlusion depth gauge

Abstract

The invention discloses an occlusion depth gauge, which comprises a positioning cylinder and a measuring ruler inserted in the positioning cylinder and moving along the axial and guiding direction. The left section of the measuring ruler is a scale section and the right end part is provided with an ejection push part; a one-way locking mechanism which can prevent the measuring ruler from retreating to the right when the measuring ruler moves to the left is arranged between the positioning cylinder and the measuring ruler; the mechanism comprises a ratch arranged on the measuring ruler and along the length direction of the measuring ruler and a one-way lock locked and matched with the ratch in a one-way mode; the one-way lock is a pawl hinged inside the positioning cylinder; the hinged shaft of the pawl is sleeved with a torsion spring; and the end part, far away from the pawl part of the pawl, is an unlocking force-applying part. The structure of the entire gauge is simple, the measurement mode is convenient and quick, the measuring efficiency is high, labor intensity of workers can be reduced to a large degree, and more importantly, through one-way locking and matching between the one-way lock and the ratch, the movement amount of the measuring ruler can be ensured to be not influenced by other factors during the process during which a static contact pushes the measuring ruler to move, and the measuring precision is high.

Description

technical field [0001] The invention relates to a measuring instrument which can be used for measuring the engagement depth of dynamic and static contacts of a high-voltage vacuum circuit breaker. Background technique [0002] The cooperation between the moving contact and the static contact of the high-voltage vacuum circuit breaker adopts the way of occlusion, wherein the moving contact includes a cylindrical contact arm and a plum blossom contact fixed at one end of the contact arm, and the static contact is a Cylindrical structure, when engaged, one end of the static contact extends into the plum blossom contact and makes close contact with each contact finger of the plum blossom contact, thereby realizing the closing of the circuit breaker. Since the depth of the static contact protruding into the plum blossom contact (that is, the bite depth of the moving and static contacts) directly affects the electrical conductivity of the moving contact and the static contact, the...

AI Technical Summary

Problems solved by technology

Since the depth of the static contact protruding into the plum blossom contact (that is, the bite depth of the moving and static contacts) directly affects the electrical conductivity of the moving contact and the static contact, the bite depth must meet the specified size requirements, while the traditional bite Depth measurement is to apply conductive paste on the outer peripheral surface of the static contact first, then shake the handcart of the circuit breaker to make the dynamic and static contacts bite, and then shake it out, by measuring the scratch left by the plum blossom contact on the static contact The length of the scratch is used to determine the bite depth; this measurement method needs to apply conductive paste on the static contact before measuring, and then use a ruler to measure the length of the scratch. The steps are cumbersome and inefficient, which undoubtedly increases the labor intensity of the workers, and Manual measurement with a ruler still has measurement errors

Images