A butterfly valve elastic metal sealing ring and its processing technology

Abstract

The invention relates to a butterfly valve elastic metal sealing ring and a machining technology thereof. The butterfly valve elastic metal sealing ring structurally comprises a metal sealing ring body which is provided with an installation hole matched with a butterfly plate. The butterfly valve elastic metal sealing ring is characterized in that planes on the two sides of the metal sealing ringbody are internally provided with elastic grooves correspondingly, the direction of the elastic grooves on the two sides and an inclined cone formed by the sealing surface of the metal sealing ring body are the same, and the inclined cone center line formed by the elastic grooves coincides with the inclined cone center line formed by the sealing surface of the metal sealing ring body; and a positioning step is arranged in the plane on one side of the metal sealing ring body. The elastic grooves are subjected to track simulating machining and is high in consistency with the curve of the sealingsurface of the metal sealing ring body. The butterfly valve elastic metal sealing ring has the advantages that the rigidity is good, the elastic compensation reliability of the sealing surface is good, and the bidirectional sealing performance of a sealing pair formed by the butterfly valve elastic metal sealing ring and a valve seat in a matched is good.

Description

technical field [0001] The invention is applicable to the field of valves, in particular to the structure and processing technology of a butterfly valve metal sealing ring. The invention is suitable for the sealing ring of the triple eccentric metal sealing butterfly valve. Background technique [0002] At present, the metal sealing ring of the triple eccentric metal sealing butterfly valve produced at home and abroad generally adopts an integral structure or a J-shaped elastic ring structure. The metal sealing ring of the integral structure has no elasticity, and the forced sealing between the metal sealing ring and the valve seat can only be realized simply. One-way sealing, full-pressure sealing cannot be achieved in the reverse direction, and the metal sealing ring has no elastic compensation. After the valve is opened and closed several times, the metal sealing surface is scratched to cause leakage, and the sealing effect is not ideal. The metal sealing ring with J-sha...

AI Technical Summary

Problems solved by technology

[0002] At present, the metal sealing ring of the triple eccentric metal sealing butterfly valve produced at home and abroad generally adopts an integral structure or a J-shaped elastic ring structure. The metal sealing ring of the integral structure has no elasticity, and the forced sealing between the metal sealing ring and the valve seat can only be realized simply. One-way sealing, full-pressure sealing cannot be achieved in the reverse direction, and the metal sealing ring has no elastic compensation. After the valve is opened and closed several times, the metal sealing surface is scratched to cause leakage, and the sealing effect is not ideal.

The metal sealing ring with J-shaped elastic ring structure is generally made of steel plate through pressing process. It has low rigidity and poor pressure resistance. During use, its elasticity will gradually decrease, or even lose its elasticity, resulting in a decrease in sealing performance. leakage

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