Bidirectional soft and hard seal eccentric half-ball valve

Abstract

The invention discloses a bidirectional soft / hard sealing eccentric half-ball valve, comprising a valve body which is connected with a valve cover; the valve body is internally provided with an eccentric crankshaft which passes through the valve cover and is hermetically connected with the valve cover; the eccentric crankshaft is connected with a spherical crown; a runway at one side of the valve body is connected with a valve base which is used for positive hard sealing; the valve base is internally provided with a sealing trough which is internally provided with a sealing ring used for reverse soft sealing; the sealing trough is communicated with the runway at the side of the sealing trough; one side of the eccentric half-ball valve corresponding to the runway adopts two sealing structures: soft sealing and hard sealing, which have different directions; therefore, the bidirectional sealing of the eccentric half-ball valve is achieved, the eccentric half-ball valve can be installed in the positive direction or the reverse direction and the applicable range of the eccentric half-ball valve is enlarged; during the reverse sealing, the sealing ring is closely combined with the spherical crown under the water pressure; the bidirectional soft / hard sealing eccentric half-ball valve has simple and reasonable structure and smart arrangement, and is an eccentric half-ball valve with completely new sealing structure.

Description

Technical field [0001] The invention belongs to a pipeline control valve, and specifically relates to an eccentric hemispherical valve. Background technique [0002] There are many types of ball valves that cut off the medium in the pipeline, including hard-seal eccentric hemispherical valves and soft-seal eccentric hemispherical valves. The hard seal eccentric hemispherical valve has a metal-to-metal seal, and the product has a cutting function, but there is a certain amount of leakage when sealing. The seal of the soft-seal eccentric hemispherical valve is metal-to-rubber, and the product has no cutting function, but the seal can achieve zero leakage. The hard-sealed ball valve can cut off the debris in the pipeline on the pipeline, so that the pipeline is unblocked, and the excess flow is large. However, due to its sealing structure, there is a certain amount of leakage, which will cause energy loss. The soft sealing ball valve can achieve zero leakage in the pipeline, but it ...

AI Technical Summary

Problems solved by technology

The hard-sealed ball valve can cut off the sundries in the pipeline on the pipeline, so that the pipeline is smooth and the flow rate is large. However, due to its sealing structure, there is a certain amount of leakage, which will cause energy loss.

The soft-sealed ball valve can achieve zero leakage on the pipeline, but it cannot cut off the sundries in the pipeline. If there are too many sundries in the pipeline, it will cause the pipeline to be blocked

And the above-mentioned eccentric hemispherical valves can only achieve one-way sealing, that is, one-way use, the ball crown can achieve sealing along the direction of water flow, and the ball crown can hardly achieve sealing against the direction of water flow

Images