Positioning fixture for processing bevel sealing working surface of valve

Abstract

The invention relates to the technical field of valve production, and discloses a positioning fixture for processing a bevel sealing working surface of a valve. The positioning fixture for processingthe bevel sealing working surface of the valve comprises an upper positioning cover and a lower positioning cover which are arranged oppositely; the upper positioning cover comprises an upper positioning plate and a positioning table arranged in the middle of the bottom end of the upper positioning plate; through holes are formed in the upper positioning cover at intervals in the transverse direction and the vertical direction; an abutting table among the through holes is arranged at the top end of the upper positioning cover; the lower positioning cover comprises a lower positioning plate; bolt holes a used for connection are formed in the lower positioning plate corresponding to the through holes; the upper positioning cover is connected with the lower positioning cover through at leasttwo transversely symmetrical screw rods; one ends of the screw rods extend out of the through holes to be connected with nuts; and a positioning groove is formed in the middle of the top surface of the lower positioning plate downwards; and vertical columns are mutual symmetrically arranged on the edge of the side wall of the lower positioning plate. According to the fixture, the positioning can be realized by utilizing the wall surface of a valve body, and the fixture is matched with a processing center to achieve the purpose of simultaneously processing three surfaces of the end surfaces ofvalve covers and the end surface of the pipeline.

Description

technical field [0001] The invention relates to the technical field of valve production, in particular to a processing and positioning fixture for a bevel sealing working surface of a valve. Background technique [0002] For gate valves, the valve sealing surface refers to the part where the valve plate and the valve disc are in contact with each other to form a seal. The cavity is tightly combined to control the opening or closing of the valve. Compared with the flat sealing form, the contact zone between the valve plate and the inner cavity is processed into double slopes in the inner cavity of the valve, so that the valve plate can use the pressure of the fluid in the pipeline in the closed state, thereby improving the sealing degree. [0003] Most gate valve bodies have three end faces extending outward: the end face of the bonnet connected to the valve bonnet and the two end faces of the pipe connected to the pipeline; because the surface of the valve body is not easy ...

AI Technical Summary

Problems solved by technology

[0003] Most gate valve bodies have three end faces extending outward: the end face of the bonnet connected to the bonnet of the valve and two end faces of the pipe connected to the pipeline; because the surface of the valve body is not easy to clamp, in the prior art, the bonnet is often covered with clamps The horizontal plane at the port is limited and fixed, and the simultaneous processing of three ports cannot be realized

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