Deformable spherical face eccentric valve

Abstract

The invention relates to a deformable spherical face eccentric valve which comprises a valve body, a valve rod and a start-stop part. The start-stop part is located in the valve body, the valve rod isconnected with the start-stop part which is provided with a sealing ring, a valve base is arranged in the valve body, the valve base and the sealing ring are closed to form a sealing face which is ahook face, the radial section of the sealing face is a perfect circle section, an included angle a is formed between the inclined line formed through the circle center of the perfect circle section and the center line of a valve flow pass, the plane formed by the inclined line and the center line of the valve flow pass is perpendicular to the axial center line of the valve rod, the axial center line of the valve rod and the center line of the valve flow way are eccentrically arranged, the circle center of the radial section, away from the valve rod, of all the radial sections of the sealing face is also located n the center line of the valve flow pass, the sealing face is a spherical face when the inclined line coincides with the center line of the valve flow pass, the sealing ring is onepart of a sphere, and the spherical center of the sphere is on the center line of the valve flow pass. The structure is simple, start-stop torque can be reduced, sealing performance is good, and the service life of the valve is prolonged.

Description

Technical field [0001] The invention relates to a valve, in particular to a deformed spherical eccentric valve. Background technique [0002] Ball valves and butterfly valves are the two most widely used and most widely used valves in today's valves. They are simple and easy to operate, and can cut off and cut off the pipeline medium. Ball valve, a valve in which the opening and closing parts (ball) are driven by the valve stem and rotate around the axis of the ball valve. It can also be used for fluid adjustment and control. The hard-sealed V-shaped ball valve has a strong shear force between the V-shaped core and the metal seat of the hard alloy overlay, which is especially suitable for fibers and small solid particles. And other media. The multi-way ball valve can not only flexibly control the confluence, divergence, and flow direction switching of the medium on the pipeline, but also close any channel and connect the other two channels. This type of valve should generally ...

AI Technical Summary

Problems solved by technology

Existing butterfly plates or ball valves have serious wear, high pressure, poor sealing performance, large opening and closing torque, and short service life

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