Pressure reducing valve with two-stage pressure reducing structure
A pressure reducing valve and valve technology, which is applied in the field of pressure reducing valves, can solve the problems affecting the stability and accuracy of the pressure reducing valve, and cannot be used as valve trims that carry cavitation, so as to achieve the effect of maintaining stability and adjusting accuracy.
Pending Publication Date: 2021-02-05
SHANGHAI AUTOMATION INSTRAION CO LTD +1
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Problems solved by technology
[0003] Due to structural limitations and other factors, the pressure reducing valve in the prior art cannot be used as a valve trim for cavitation, which affects the stability and accuracy of the pressure reducing valve under high pressure difference
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Embodiment Construction
[0012] The present invention will be further described below in conjunction with accompanying drawing and embodiment:
[0013] figure 1 It is a structural schematic diagram of a pressure reducing valve with a two-stage decompression structure of the present invention, please refer to figure 1 , a pressure reducing valve with a two-stage pressure reducing structure, comprising: a pressure reducing valve assembly, characterized in that two pressure reducing valve assemblies are installed in a valve body 1: a first pressure reducing valve assembly 3, a second pressure reducing valve assembly Component 5, hard seal is used in the first valve component, and soft seal is used in the second pressure reducing valve component 5; the valve upper cavity of the first pressure reducing valve component 3 communicates with the valve lower cavity of the second pressure reducing valve component 5, through The flow channel 4 inside the valve body 1 is connected; the valve body 1 has an inlet 2...
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The invention discloses a pressure reducing valve with a two-stage pressure reducing structure. The pressure reducing valve comprises pressure reducing valve components, wherein two pressure reducingvalve components including a first pressure reducing valve component and a second pressure reducing valve component are mounted in a valve body, a hard seal is adopted in the first pressure reducing valve component, and a soft seal is adopted in the second pressure reducing valve component; a valve upper cavity of the first pressure reducing valve component is communicated with a valve lower cavity of the second pressure reducing valve component; and the valve body is provided with an inlet and an outlet, a valve lower cavity of the first pressure reducing valve component is communicated withthe inlet, and a valve upper cavity of the second pressure reducing valve component is communicated with the outlet. According to the pressure reducing valve, the two independent pressure reducing valve components are installed in the same valve body, the two pressure reducing valve components are communicated, the hard seal is adopted in the first pressure reducing valve component, the soft sealis adopted in the second pressure reducing valve component, and therefore stability and adjusting accuracy can be kept under the conditions of high pressure difference, high leakage requirements and large valve front pressure fluctuation.
Description
technical field [0001] The invention relates to a decompression valve, in particular to a decompression valve with a two-stage decompression structure. Background technique [0002] The role of the pipeline pressure reducing valve is to maintain a stable pressure in the pipeline downstream of the pressure reducing valve. Pressure reducing valves are structurally divided into two types: external pressure taking and internal pressure taking. For high-pressure pressure reducing valves, due to the high pressure, it is not suitable to use pressure reducing valves with external pressure taking structures. The principle of the internal pressure reducing valve is a valve. The pressure behind the pressure reducing valve is applied to the isolation layer (diaphragm or piston) in the valve body to balance the thrust generated by the spring force above the valve body to achieve stability. The effect of post-valve pressure. [0003] Due to structural limitations and other factors, the...
Claims
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IPC IPC(8): F16K17/30F16K17/34F16K27/02F16K31/122
CPCF16K17/30F16K17/34F16K27/0254F16K31/1221
Inventor 郭雄雄卢安乐周强强吴逸超邱健黄春霞乐秀辉徐邱伟屈飞飞
Owner SHANGHAI AUTOMATION INSTRAION CO LTD