Self-control check valve

A check valve and valve body technology, applied in the direction of control valves, valve details, valve devices, etc., can solve problems such as increased energy consumption, increased pipeline layout costs, and difficulty in controlling the opening or closing time of check valves, etc., to achieve Effects of saving energy consumption and saving additional costs

Pending Publication Date: 2021-06-01
BEIJING VALVE GENERAL FACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the fields of water conservancy, hydropower, sewage treatment and seawater desalination and other fields, a large number of valves need to be arranged on the medium conveying pipeline, and check valves are usually arranged on some pipelines that need to prevent the medium from flowing backward. It can be opened automatically, and can be automatically closed when the medium flows in the reverse direction; because the opening or closing of the existing check valve depends on the force of the medium on the disc, it is difficult to control the opening or closing time of the existing check valve; when it is necessary to control the check valve When the return valve is opened or closed, an additional hydraulic control system is required, which will increase the cost of piping layout, and the hydraulic control system will increase energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment relates to a self-control check valve, refer to figure 1 and figure 2 As shown, it includes a valve body 1, in which a channel for medium circulation is provided, and a valve seat 2 is provided in the channel; the self-control check valve also includes a valve disc 3 and a self-control structure; wherein, the valve The disc 3 is rotatably arranged on the valve body 1, and the valve disc 3 can be rotated to cooperate with the valve seat 2, or disengage from the valve seat 2, and correspondingly block or allow the flow of the medium in the channel.

[0031] The self-control structure includes a piston chamber 101 arranged on the valve body 1, a piston 4 which is slidably arranged in the piston chamber 101 and divides the piston chamber 101 into an upper chamber and a lower chamber, and is arranged at the input end of the channel and the lower chamber. Between the first conduit 5, the second conduit 6 between the output end of the passage and the upper ch...

Embodiment 2

[0046] This embodiment relates to a self-control check valve, which has roughly the same structure as the self-control check valve described in Embodiment 1, the difference lies in: figure 1 and Figure 4 As shown, the piston chamber 101 of this embodiment includes a conical hole section 1011 and a straight hole section 1012 connected in series up and down, and along the direction from top to bottom, the section of the tapered hole section 1011 is gradually reduced, and the tapered hole section 1011 has a small diameter The diameter of the end is equal to the diameter of the straight hole section 1012.

[0047] By setting the structure of the piston cavity 101 according to the above structure, when the piston 4 slides in the piston cavity 101, it will have different sliding speeds. Specifically, the sliding speed of the piston 4 in the tapered hole section 1011 is faster than that of the piston 4. The sliding speed in the straight hole section 1012; that is, when the piston 4...

Embodiment 3

[0051] This embodiment relates to a self-control check valve, which has roughly the same structure as the self-control check valve described in Embodiment 2, the difference lies in: figure 1 As shown, in this embodiment, a water hammer absorption chamber 102 is constructed on the valve body 1, and the top end of the piston rod 41 extends into the piston chamber 101 after passing through the water hammer absorption chamber 102; A number of communication holes are opened on the bottom wall to form the communication between the water hammer absorption chamber 102 and the channel, and the water hammer absorption chamber 102 is provided with a water hammer absorption plate 8, and the water hammer absorption plate 8 is slidingly sleeved On the piston rod 41, the outer periphery of the water hammer absorption plate 8 abuts against the side wall of the water hammer absorption chamber 102, and an elastic Item 9.

[0052] In this example, refer to figure 1 As shown, a mounting part is...

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Abstract

The invention provides a self-control check valve. The self-control check valve comprises a valve body, a valve seat arranged in the valve body, a valve clack, a self-control structure and a water hammer absorption unit. The valve clack can rotate to be matched with the valve seat or separated from the valve seat, and correspondingly cuts off or allows a medium to flow in a channel; the self-control structure comprises a piston cavity formed in the valve body, a piston slidably arranged in the piston cavity and a transmission unit arranged between the piston and the valve clack; the piston cavity comprises a taper hole section and a straight hole section which are connected in series, so that the piston has different sliding speeds, the valve clack is correspondingly driven to have different rotating speeds, and the water hammer pressure is prevented from forming a peak value; and the water hammer absorption unit comprises a water hammer absorption disc slidably arranged on the valve body and an elastic piece connected between the water hammer absorption disc and the valve body in an abutting mode. According to the self-control check valve, the opening and closing time can be conveniently adjusted, the water hammer pressure can be well eliminated, and the safety of a pump station system is effectively improved.

Description

technical field [0001] The invention relates to the technical field of valve equipment, in particular to an automatic control check valve. Background technique [0002] In the fields of water conservancy, hydropower, sewage treatment and seawater desalination and other fields, a large number of valves need to be arranged on the medium conveying pipeline, and check valves are usually arranged on some pipelines that need to prevent the medium from flowing backward. It can be opened automatically, and can be automatically closed when the medium flows in the reverse direction; because the opening or closing of the existing check valve depends on the force of the medium on the disc, it is difficult to control the opening or closing time of the existing check valve; when it is necessary to control the check valve When the return valve is opened or closed, an additional hydraulic control system is required, which will increase the cost of pipeline layout, and the hydraulic control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/03F16K15/18F16K27/02F16K31/122
CPCF16K15/03F16K27/0209F16K31/122
Inventor 陈锦标
Owner BEIJING VALVE GENERAL FACTORY CO LTD
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