A butterfly valve with excellent sealing effect due to improved butterfly plate

Abstract

The invention discloses a butterfly valve with excellent sealing effect by improvement of a butterfly plate. The butterfly valve comprises a valve body which is of a cylindrical structure; an annular clamping groove is formed in the inner surface of the valve body; a through hole formed in the outer surface of the valve body is connected with a bushing; the top of the bushing is connected with a turntable; in addition, the butterfly plate is arranged in the valve body and is of a hollow structure; the outer surface of the butterfly plate is symmetrically connected with a first valve rod and a second valve rod; one end, far away from the butterfly plate, of the first valve rod sequentially penetrates through the annular clamping groove and the through hole formed in the outer surface of the valve body and is connected with the bottom of the turntable; one end, far away from the butterfly plate, of the second valve rod penetrates through the annular clamping groove and extends into the inner wall of the valve body; a circular storage box is arranged in the center in the butterfly plate; and in addition, limiting grooves formed in the outer side of the circular storage box are formed in the inner wall of the butterfly plate. According to the butterfly valve with excellent sealing effect by improvement of the butterfly plate, a sealing manner of a sealing ring and the butterfly plate in the prior art is replaced, so that the sealing effect is more excellent, in addition, the service life of the butterfly valve is greatly increased, and the applicability is higher.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a butterfly valve whose sealing effect is excellent due to an improved butterfly plate. Background technique [0002] Butterfly valve, also known as flap valve, is a regulating valve with simple structure, which can be used for switching control of low-pressure pipeline medium. A kind of valve, the valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays the role of cutting and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjustment. [0003] When the existing butterfly valve is sealed, the butterfly plate and the sealing ring are cooperated to achieve the sealing effect, but the butterfly plat...

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Problems solved by technology

[0003] When the existing butterfly valve is sealed, the butterfly plate and the sealing ring are cooperated to achieve the sealing effect, but the butterfly plate will rub against the sealing ring during the rotation process, so the longer the time, the degree of wear of the sealing ring will be reduced. It will be higher, so that the sealing effect of the butterfly valve will be reduced, and the service life of the butterfly valve will be reduced.

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