Rotary control valve with high flow controllability

Abstract

The invention belongs to the technical field of valves, and discloses a rotary control valve with high flow controllability. The rotary control valve with the high flow controllability comprises a valve body, a valve rod and a valve plate. The valve rod penetrates through the top and bottom of the valve body and is connected with the valve body at the penetrating positions through bearings. The valve body comprises a medium inlet and a medium outlet, and a rubber sealing ring matched with the valve plate is installed in the valve body and located at the medium inlet end. An arc-shaped protrusion is arranged on the surface, facing towards the medium outlet, of the valve plate, the arc-shaped protrusion is arranged close to the periphery of the valve plate, and the convex surface of the arc-shaped protrusion and the rubber sealing ring can be in contact with each other or form a gap of less than 5mm when the valve plate rotates by 0-70 degrees. By arranging the arc-shaped protrusion on the valve plate, the medium resistance is high at the contact point or the gap between the arc-shaped protrusion and the rubber sealing ring, so that flow cannot pass through the contact or the gap, thus, the flow at the medium outlet is limited, and the low opening controllability of the rotary control valve is improved effectively.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a rotary control valve with strong flow controllability. Background technique [0002] A rotary control valve is a rotary valve. A common rotary valve such as a butterfly valve is a mechanical device that changes the valve from an open position to a closed position by rotating a rotating part such as a rotating baffle (valve plate). The valve plate rotates at a certain angle to make the rotation After the valve has a certain opening, the medium will flow along the openings on both sides formed by the valve plate and the valve body. Even if the opening is low, the valve plate will still form a large gap with the valve body, which cannot be flexible. Control the excess flow of the medium, and when the medium passes through the gap, a large noise will be generated. Contents of the invention [0003] The technical problem solved by the present invention is to overcome the defects o...

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Problems solved by technology

[0002] A rotary control valve is a rotary valve. A common rotary valve such as a butterfly valve is a mechanical device that changes the valve from an open position to a closed position by rotating a rotating part such as a rotating baffle (valve plate). The valve plate rotates at a certain angle to make the rotation After the valve has a certain opening, the medium will flow along the openings on both sides formed by the valve plate and the valve body. Even if the opening is low, the valve plate will still form a large gap with the valve body, which cannot be flexible. Control the excess flow of the medium, and when the medium passes through the gap, it will generate a lot of noise

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