Control valve

Abstract

The invention provides a control valve. The control valve is characterized in that a valve body part comprises a first sealing gasket, a second sealing gasket, a valve element and a first one-way fluid control part, in the valve closing state, the first sealing gasket is abutted against the valve element to form a first sealing part, the second sealing gasket is abutted against the valve element to form a second sealing part, a valve cavity, isolated by the first sealing part and the second sealing part, of the control valve is an inner cavity, a first cavity is formed between an inner ring part and an outer ring part of the first one-way fluid control part, a circulation channel is formed in the outer ring part and / or a base part, the circulation channel communicates with the inner cavityand the first cavity, the valve body part comprises a first fluid port, after an elastic deformation part of the inner ring part deforms, a radial gap is formed between at least part of the elastic deformation part and a first valve seat, and fluids can unidirectionally circulate from the first fluid port to the inner cavity through a radial gap. When the control valve is closed, the pressure ofthe fluids borne by the two sides of the first sealing gasket tends to be balanced, the acting force of the first sealing gasket on the valve element is reduced, and the torque needed by a valve rod to drive the valve element to rotate during valve opening is reduced.

Description

technical field [0001] The invention relates to the technical field of fluid control, in particular to a control valve. Background technique [0002] figure 1 Shown is a schematic structural diagram of a control valve in the background technology. [0003] Such as figure 1 As shown, the control valve includes a valve body 01, a valve seat 02, a first connecting pipe 03, a second connecting pipe 04, a valve stem 05, and a valve core 06. The valve body 01 is fixedly connected with the valve seat 02, the valve body 01 is fixedly connected with the first connecting pipe 03, and the valve seat 02 is fixedly connected with the second connecting pipe 04. By rotating the valve rod 05, the valve core 06 can be driven to rotate to realize opening and closing the valve. In the control valve, a seal 07 is provided between the valve core 06 and the valve body 01 , and a seal 08 is provided between the valve core 06 and the valve seat 02 . When the high-pressure fluid flows in from t...

AI Technical Summary

Problems solved by technology

When the high-pressure fluid flows in from the first connecting pipe 03, the left side of the seal 07 is high pressure, and the right side of the seal 07 is low pressure, the pressure difference force on the seal 07 acts on the valve core 06, and the valve stem 05 drives the valve core 06 to rotate The required torque becomes larger, which will affect the valve opening performance of the control valve

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