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Check valve with low flow resistance and small pressure difference

A technology of low flow resistance and check valve, applied in the direction of valve details, control valves, valve devices, etc., can solve the problems of difficult closing, large flow resistance of swing check valves, etc., and achieve reduced flow resistance and accurate feedback Effect

Pending Publication Date: 2022-02-01
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the current swing check valve has a large flow resistance, requires a certain medium pressure to ensure the opening of the valve plate, and is prone to the problem of difficulty in closing. The purpose is to provide a new low flow check valve. Small pressure difference check valve, when the system has a medium flowing through the check valve in the forward direction, only a small pressure can make the valve plate meet the small pressure difference opening requirements, and when the medium flows in the reverse direction, it can quickly close the check valve Return valve, so that the opening angle of the valve plate is not limited, reducing the flow resistance of the valve

Method used

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  • Check valve with low flow resistance and small pressure difference
  • Check valve with low flow resistance and small pressure difference

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Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1As shown, a low flow resistance and small pressure difference check valve provided by the embodiment of the present invention consists of a valve body assembly 1, a valve plate 2, a counterweight mechanism 3, a valve closing auxiliary mechanism 4, a valve shaft 5, a valve cover 6, It consists of a wedge-shaped gasket 7, a four-way ring 8, a support ring 9, and a signal feedback mechanism 10, including a valve body assembly 1, a valve plate 2, and a valve shaft 5. It is characterized in that the valve shaft 5 can rotate freely around its own axis, and also includes The counterweight mechanism 3 and the valve closing auxiliary mechanism 4; the counterweight mechanism 3 is fixedly installed on the valve shaft 5, and the counterweight mechanism 3 is connected with the valve plate 2, and the counterweight mechanism 3 is used to make the center of gravity of the valve plate 2 It falls on the center of the valve shaft 5; the valve closing auxiliary mechanism 4 ...

Embodiment 2

[0045] A low flow resistance and small differential pressure check valve provided by an embodiment of the present invention, the signal feedback mechanism 10 includes a cam 11, a feedback lever 12, a spring 13, a shielding sleeve 14, a magnetic induction switch, and a sealed housing 15; the cam 11 is installed on one end of the valve shaft 5 and rotates synchronously with the valve shaft 5; a permanent magnet is installed on the feedback rod 12, the feedback rod 12 is set in the shielding sleeve 14, and a spring 13 is installed between the feedback rod 12 and the shielding sleeve The magnetic induction switch is set in the sealed housing 15; the rotation of the cam 11 and the spring 13 can push the feedback rod 12 to reciprocate up and down, so that the permanent magnet triggers or disconnects the contact of the magnetic induction switch.

[0046] When the check valve is closed, the feedback lever is at the low point of the cam, and the permanent magnet at the upper end of the ...

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Abstract

The invention discloses a check valve with low flow resistance and small pressure difference. The check valve comprises a valve body assembly, a valve plate and a valve shaft, and is characterized in that the valve shaft can freely rotate around the axis of the valve shaft, and the check valve further comprises a balance weight mechanism and a valve closing auxiliary mechanism; the balance weight mechanism is fixedly mounted on the valve shaft, is connected with the valve plate, and is used for enabling the gravity center of the valve plate to fall on the center of the valve shaft; the valve closing auxiliary mechanism is installed on the valve shaft and can freely rotate around the axis of the valve shaft, the valve closing auxiliary mechanism is suspended above the valve plate and supported on the valve body assembly, and after the valve plate is opened by a certain angle, the valve plate can make contact with the valve closing auxiliary mechanism. According to the check valve, when a medium in a system flows through the check valve in the forward direction, the valve plate can meet the small-pressure-difference opening requirement only through small pressure, when the medium flows in the reverse direction, the check valve can be rapidly closed, the opening angle of the valve plate is not limited, and the circulation resistance of the valve is reduced.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a check valve with low flow resistance and small pressure difference. Background technique [0002] The ordinary swing check valve wears the valve plate on the valve shaft. The valve plate can rotate around the valve shaft at a certain angle. When the medium is not introduced, the valve plate is in a closed state. When the force of the swing check valve is greater than the weight of the valve plate, the valve plate will open. Since medium pressure is required to ensure that the valve plate is opened, the flow resistance of the swing check valve is relatively large. Heavy swing check valve structure, but it is prone to difficult closing problems; moreover, in order to ensure reliable closing, the swing check valve needs to limit the opening angle of the valve plate to not be too large, which increases the flow resistance of the whole valve. In addition, since the check valve is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/18F16K15/03F16K37/00F16K27/08
CPCF16K37/0041F16K27/08
Inventor 宋丹戎钟发杰李庆谭术洋曾畅蔡志云任云
Owner NUCLEAR POWER INSTITUTE OF CHINA