Middle and high pressure guiding type water pressure reducing valve
A pilot-operated valve and pilot-operated technology, applied in balance valves, valve devices, safety valves, etc., can solve problems such as corrosion, large leakage, cavitation, etc., to improve stability, reduce requirements and processing costs, and reduce pressure Effects of Shock and Oscillation Actions
Inactive Publication Date: 2007-07-18
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
[0004] The present invention proposes a medium-high pressure pilot-operated water pressure reducing valve. Aiming at the low viscosity of the water medium, cavitation drawing and severe pressure shock, it proposes corresponding solutions from the aspects of structural type and material selection, and overcomes the existing pilot-operated pressure reducing valve. The pressure reducing valve has problems such as large leakage, serious corrosion and cavitation
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[0011] Figure 1 shows an embodiment of the present invention, in the figure, valve body 1, outlet sealing ring 2, main valve damping screw plug 3, main valve core 4, valve sleeve sealing ring 5, combined sealing ring 6, valve sleeve 7 , spring seat 8, valve core sealing ring 9, main valve spring 10, pilot valve body 11, screw plug 12, screw plug sealing ring 13, bolt 14, spring washer 15, pilot valve seat 16, pilot valve damping screw plug 17 , Pilot valve body sealing ring 18, pilot valve core 19, leakage port sealing ring 20, pilot valve spring 21, adjusting rod 22, adjusting rod sealing ring 23, lock nut 24, adjusting handle 25, oil drain port 26, main valve Core right chamber 27, main valve throttle port 28, main valve core left chamber 29.
[0012] As shown in Figure 1, as an example, the rated working pressure of the valve is 21 MPa, the outlet working pressure is 10-16 MPa, and the rated flow rate is 40 L / min. By adjusting the handle 25, by compressing the pilot valve ...
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The invention is a medium- and high- pressure pilot water pressure reducing valve, mainly comprising main valve and pilot valve, where in the pilot valve is pilot valve seat, pilot valve core, pilot valve spring and regulating rod arranged in turn; the main valve body is made with water inlet and outlet, and internally equipped with valve sleeve, the valve sleeve is internally equipped with main valve core; and it is characterized in that: (1) when the pilot valve core cooperates with the pilot valve seat, two acute angle side-shaped orifices simultaneously play a throttling role; (2) the valve seat hole of the pilot valve seat is internally equipped with pilot valve damping plug screw; (3) the axis of the main valve core is made with connecting hole in which the main valve damping plug screw is arranged. On the premise of not increasing machining accuracy, it reduces valve leakage, improves gas corrosion resistance and pollution resistance, as well as stability, and can use sea and fresh water and other low viscosity fluids as working media.
Description
technical field [0001] The invention belongs to hydraulic transmission components, and in particular relates to a medium-high pressure pilot-operated water pressure reducing valve, which is applied in a hydraulic transmission system using low-viscosity fluids such as sea and fresh water as medium. Background technique [0002] The water hydraulic transmission technology that directly uses sea and fresh water as the working medium has outstanding advantages such as environmental protection, flame retardant, and low cost. However, due to the strong corrosiveness, high density, low viscosity and high vaporization pressure of water, the traditional oil pressure reducing valve directly uses water as the working medium, which has large leakage, serious cavitation and wire drawing erosion, and poor stability. question. If it is used in polluted environments such as rivers and oceans, the sediment in the water will also severely erode and scrape the valve core and valve seat. [0...
Claims
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Login to View More IPC IPC(8): F16K17/10G05D16/00
Inventor 刘银水杨友胜吴珊贺小峰李壮云
Owner HUAZHONG UNIV OF SCI & TECH