a valve plate

Abstract

The invention discloses a valve plate, which comprises a valve plate body, wherein the valve plate body is shaped into a regular hexagon; a through groove is formed in the middle position of the valve plate body; a plurality of through holes also are formed around the through groove respectively, and comprise first through holes, second through holes and third through holes; the first through holes are formed in the left and right sides of the valve plate body; the second through holes are formed in the upper and lower sides of the valve plate body; the third through holes are formed in the upper side of the valve plate body. The valve plate is molded at one time by powder metallurgy, the through groove is formed in the middle position of the valve plate body, and the through holes also are formed around the through groove respectively, so that the valve plate has the advantage of compact and firm structure, and can be completely attached to the sealing surface of a valve seat, a good sealing effect can be maintained, and the leakage of a medium can be minimized.

Description

technical field [0001] The invention relates to the field of CNC machine tools, in particular to a valve plate. Background technique [0002] When the traditional gate valve is in high temperature or temperature alternating conditions, the valve plate and seat are prone to thermal expansion, deformation and creep when heat treatment process or workload is carried out. The shape of the valve seat is generally a cylindrical ring, and the deformation is uniform when the overall temperature is close to the medium temperature. The valve plate is approximately rectangular, and the temperature of the part in contact with the medium is higher than that of other surrounding parts. The temperature field is unevenly distributed, resulting in uneven deformation, which makes the valve seat and the valve plate poor contact, and the sealing surface cannot be completely fitted, resulting in This will result in problems such as excessive local sealing specific pressure, easy scratches on th...

AI Technical Summary

Problems solved by technology

The valve plate is approximately rectangular, and the temperature of the part in contact with the medium is higher than that of other surrounding parts. The temperature field is unevenly distributed, resulting in uneven deformation, which makes the valve seat and the valve plate poor contact, and the sealing surface cannot be completely fitted, resulting in Cause local sealing specific pressure to be too large, sealing surface is easy to scratch, gaps, leakage increase and sealing requirements cannot be met, and even cause accidents such as device shutdown

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