Fluid automatic check valve
An automatic shut-off and shut-off valve technology, used in safety valves, balance valves, valve devices, etc., can solve the problems of large cost response time, loss of control of the safety system, etc., to reduce costs, prevent accidents, and increase safety. Effect
Inactive Publication Date: 2009-06-03
上海航天动力科技工程有限公司
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Problems solved by technology
However, the cost of using this method is relatively high, and signal transmission requires a certain reaction time. In addition, when an emergency occurs, if the signal transmission system is also destroyed, the safety system will lose control.
Method used
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[0006] The present invention will be described in further detail below in conjunction with the accompanying drawings and examples.
[0007] like figure 1 A fluid automatic shut-off valve is shown, which is composed of a baffle 1, a valve core 2, a shut-off valve casing 3, a spring 4, a spring seat 5, a regulating screw plug 6, a fluid inlet 7 and a fluid outlet 8: the baffle 1 and the shut-off valve The inner diameter of the outer casing 3 is closely matched, and there is a fluid inlet 7 in the middle of the baffle plate 1. The valve core 2 is placed in the cavity composed of the baffle plate 1 and the stop valve outer casing 3, and is in direct contact with one end of the spring 4. The gap between the circle and the inner circle of the globe valve casing 3 is different from the cross-sectional area of the fluid inlet 7. Therefore, a pressure difference is generated when the fluid passes through, and the force generated by the pressure difference acts on the valve core 2, ca...
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The invention discloses a fluid automatic check valve, belonging to the technical field of valves; the fluid automatic check valve consists of a baffle, a valve core, a check valve sleeve, a spring, a spring seat, an adjusting plug screw, a fluid inlet and a fluid outlet; the pressure difference generated by a fluid passage leads the valve core to move towards the downstream; the movement of the valve core is stopped by the spring which is arranged at the fluid outlet so that the fluid can pass normally according to the flux requirement of the system. When the flux of the fluid exceeds technical specified value, the force acted on the valve core is increased more than the supporting force of the spring; the valve core is close to the internal wall of the check valve sleeve, increases the flowing speed and the pressure difference continuously; the sealing surface between the valve core and the check valve sleeve is completely contacted and sealed, the flowing of the fluid is stopped and the valve is closed automatically. The fluid automatic check valve can close the fluid immediately when the high-pressure fluid conveying pipeline is broken, thus preventing the occurring of contingency and increasing the safety of conveying the high-pressure fluid. Compared with the safety system employing the electromagnetic valve, the cost of the fluid automatic check valve is greatly reduced.
Description
technical field [0001] The invention relates to the technical field of valves, in particular to a fluid automatic shut-off valve that can be automatically closed immediately when the flow rate of the fluid accidentally exceeds a specified value. Background technique [0002] The high-pressure fluid in the high-pressure pipeline transportation system usually includes natural gas, hydrogen and other fluids, such as natural gas used in natural gas vehicles, hydrogen used in hydrogen fuel cell vehicles, etc. Their common characteristics are that the fluid in the fuel supply pipeline has high pressure, large flow, Flammable, and some fluids are harmful to humans and the environment. In the event of an accident, a large amount of high-pressure flammable fluid will leak instantly after the fuel pipeline is broken, which will cause huge economic losses and personal injury. In order to strengthen the safe transportation of high-pressure fluids in pipelines, the current safety measur...
Claims
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IPC IPC(8): F16K17/24
Inventor 陈卫国郭正柔
Owner 上海航天动力科技工程有限公司