Soft sealing butterfly valve and method for preparing valve seat sealing ring thereof

Abstract

The invention relates to a soft sealing butterfly valve and a method for preparing a valve seat sealing ring thereof, wherein the valve body of the butterfly valve is provided internally with a valve seat; the valve seat is provided with a sealing ring for the soft sealing; the sealing side surface of the valve seat is provided with an annular groove the interior of which is large and the exterior of which is small; the sealing ring is fixed on the annular groove; the sealing surface of the top of the sealing ring is exposed outside the annular groove; and the part, positioned in the annular groove, of the sealing ring is matched with the groove wall of the annular groove. The method for preparing the sealing ring comprises: placing the main body of the sealing ring in the annular groove; pouring solidifiable resin in the annular center joint of the main body of the sealing ring through a through hole on the valve seat, and enabling two halves of the main body of the sealing ring to be expanded to cling to the side wall of the annular groove. According to the invention, the structure is simple, the sealing is reliable, and the sealing ring of the valve seat has less possibility of dropping and is suitable for various soft sealing butterfly valves.

Description

technical field [0001] The invention relates to a soft-sealing butterfly valve, and also relates to a preparation method of a valve seat sealing ring of the butterfly valve. Background technique [0002] Whether the rubber sealing ring of the traditional soft-sealed butterfly valve is fixed on the valve seat of the valve body or on the butterfly plate, it is necessary to fix the rubber sealing ring with a pressure plate and screws. Usually, the pressure plate and the rubber sealing ring The pressing surfaces of the valves are planes parallel to each other, which makes the fixing of the rubber sealing ring unreliable and easy to fall off. In actual use, the valve often fails due to the falling off of the sealing ring. Contents of the invention [0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a soft-sealed butterfly valve, and also provides a method for preparing a valve seat sealing ring of the soft-sealed butterfly ...

AI Technical Summary

Problems solved by technology

[0002] Whether the rubber sealing ring of the traditional soft-sealed butterfly valve is fixed on the valve seat of the valve body or on the butterfly plate, it is necessary to fix the rubber sealing ring with a pressure plate and screws. Usually, the pressure plate and the rubber sealing ring The pressing surfaces of the valves are parallel to each other, which makes the rubber sealing ring unreliable and easy to fall off. In actual use, the valve often fails due to the falling off of the sealing ring.

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