A bellows two-way hard seal butterfly valve

Abstract

The invention discloses a corrugated pipe bidirectional hard-sealing butterfly valve which comprises a valve seat. Two connecting plates are arranged on the valve seat and located on the edges of the front end and the rear end of the valve seat correspondingly. A supporting plate is arranged at the upper ends of the two connecting plates. An operation mechanism is arranged at the upper end of the supporting plate. A hand wheel is arranged at the upper end of the operation mechanism. The lower end of the operation mechanism is connected with a valve rod. The end, away from the operation mechanism, of the valve rod penetrates through the supporting plate and extends to the lower portion of the supporting plate. Elastic pieces are arranged on the side walls at the left end and the right end of the valve rod, and located below the supporting plate. A disc plate is connected with the lower end of the valve rod, a groove is formed in the side wall of the front end of the disc plate, and the lower end of the valve rod is located in the groove. Two cavities are formed in the disc plate and located in the portions, on the left side and the right side of the groove, of the disc plate correspondingly. A through hole enabling the interior to communicate with the exterior is formed in the side wall of the front end of each cavity, and a rotary shaft is arranged in the through hole in a penetrating mode. According to the corrugated pipe bidirectional hard-sealing butterfly valve, the disc plate can be replaced conveniently, and the service life of the butterfly valve can be effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of butterfly valves, in particular to a bellows bidirectional hard-sealed butterfly valve. Background technique [0002] Butterfly valve, also known as flap valve, is a regulating valve with simple structure, which can be used for switch control of low-pressure pipeline medium. It is 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, which rotates around its own axis in the valve body, so as to achieve the purpose of opening and closing or adjustment. In the existing bellows two-way hard-sealed butterfly valve, the butterfly plate is fixed in the valve body It is not easy to replace, and the wear caused by long-term use is reduced and the sealing performance...

AI Technical Summary

Problems solved by technology

The opening and closing part of the butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body, so as to achieve the purpose of opening and closing or adjustment. In the existing bellows two-way hard-sealed butterfly valve, the butterfly plate is fixed in the valve body It is not easy to replace, and the wear caused by long-term use is reduced and the sealing performance of the butterfly valve is reduced

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