Symmetry degree Measuring method of ball valve two end faces

Abstract

Provided is a symmetry degree measuring method of ball valve two end faces. An A face and a B face are machined on two end faces of a ball valve (7) . A measuring device comprises a measuring platform (1), a compressing bolt (2), a V-shaped block (3), a measuring meter (4), cushion blocks (5) with various heights and a meter seat (6). The symmetry degree measuring method of ball valve two end faces comprises the following steps: fixing measuring meter with a journey equaling to or larger than R minusing half H on a fixing meter seat through the compressing bolt, placing the ball valve of 2R inside the V-shaped block and enabling the A face and the B face of the ball valve to be in a mutual parallel mode with a symmetrical center line through the cushion blocks with various heights, the parallel mode reading out a basic value H 0 through a maximum retraction quantity. Measured and calculated symmetrical values of the A face and the B face being respectively delta HA equalling to H0 minus HA and delta HB equalling to H0 minus HB. If delta HA equals to delta HB, the A face and the B face are symmetrical corresponding to the ball valve center line. If delta HA is larger or smaller than delta HB, the A face and the B face are asymmetrical. The symmetry degree measuring method of ball valve two end faces is simple, convenient, fast and accurate.

Description

technical field [0001] The invention belongs to the technical field of measurement, in particular to a method for measuring the symmetry of both ends of a ball valve. Background technique [0002] The structure of the ball valve is as figure 1 As shown, the two ends of the ball valve 7 have A surface and B surface, A surface is parallel to B surface, a through hole is arranged between A surface and B surface and along the center line of ball valve 7, and the width from A surface to B surface is H, the distance from surface A to the centerline of the ball valve and the distance from surface B to the centerline of the ball valve must be equal to H / 2, in order to ensure that the post-processed guide groove 7.1 has symmetry with respect to surfaces A and B, if the distance is not If it is equal to H / 2 or the distance deviation is large, the guide groove 7.1 does not have symmetry with respect to the A surface and the B surface. [0003] Since the ball valve 7 is ...

AI Technical Summary

Problems solved by technology

[0003] Since the ball valve 7 is used on the sliding doors of automobiles, trains, trains or airplanes, the higher the symmetry of the guide groove 7.1 relative to the A surface and the B surface, the higher the opening flexibility of the sliding door. 7.1 When the transition is biased to the A side or the B side, the sliding door will be stuck, and the consequences will be serious

Images