A two-way sealing high-performance butterfly valve

Abstract

The invention provides a bi-directional sealing high-performance butterfly valve which comprises a valve body, a valve plate and a valve rod. A sealing base is arranged on the outer periphery of the valve plate. A boss is arranged on the inner periphery of the valve body. A sealing ring is arranged on one side of the boss and shaped like the Arabic number seven. The short edge of the sealing ring is arranged in the mode of facing the boss. The left side of the short edge is attached to the inner wall of the valve body. The long edge of the sealing ring is an arc edge matched with the sealing base. A pressing plate with the inverted-T-shaped cross section is arranged on the lower side of the short edge of the sealing ring. The vertical edge of the pressing plate makes contact with the short edge of the sealing ring. The left section of the transverse edge of the pressing plate is arranged on the step of the end of the valve body and fixedly connected with the step of the end of the valve body through a pressing bolt. An adjusting ring is arranged between the right section of the transverse edge of the pressing plate and the short edge of the sealing ring. The adjusting ring makes contact with the transverse edge of the pressing plate and is fixedly connected with the transverse edge of the pressing plate through a tightening bolt. An inner hole in the upper section of the adjusting ring is a conical hole decreasing gradually from top to bottom. The inner wall of the conical hole is matched with the lower end of the arc edge of the sealing ring. It can be ensured that the butterfly plate hardly rubs with the sealing ring in the opening process, the sealing effect is good, and the service life is long.

Description

technical field [0001] The invention relates to a butterfly valve for pipelines, in particular to a two-way sealing high-performance butterfly valve. Background technique [0002] In the known butterfly valve technology, its sealing form mostly adopts a sealing structure, and the sealing material is rubber, polytetrafluoroethylene, etc. Due to the limitations of structural features, it is not suitable for industries such as high temperature resistance, high pressure resistance, corrosion resistance, and wear resistance. [0003] In addition, there is a sealing structure, which uses an elastic metal sealing ring on the inner wall of the valve and a sealing seat on the outer circumference of the butterfly plate for sealing. The expected effect is not achieved, and due to the influence of temperature and passing medium during use, it is easy to fail and not easy to repair. Parts must be replaced to ensure the continued use of the butterfly valve, which will not only cause leak...

AI Technical Summary

Problems solved by technology

Due to the limitation of structural features, it is not suitable for industries such as high temperature resistance, high pressure resistance, corrosion resistance, and wear resistance.

[0003] In addition, there is a sealing structure, which uses an elastic metal sealing ring on the inner wall of the valve and a sealing seat on the outer circumference of the butterfly plate for sealing. The expected effect is not achieved, and due to the influence of temperature and passing medium during use, it is easy to fail and not easy to repair. Parts must be replaced to ensure the continued use of the butterfly valve, which will not only cause leakage problems, but also cause production costs increase

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