Check valve

A check valve, valve seat technology, applied in valve details, control valves, valve devices, etc., can solve problems such as leakage, impact buffer effect, complex structure, etc., to ensure work safety, avoid impact, and eliminate water hammer. Effect

Inactive Publication Date: 2008-08-27
JIANGSU YUANYANG VALVE INTELLIGENT CONTROL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of device has a complex structure, which not only requires many fittings to be connected with pipes, but also easily produces external leakage after a short period of use, which also affects the cushioning effect

Method used

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  • Check valve
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Experimental program
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Effect test

Embodiment Construction

[0012] A preferred embodiment of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0013] like figure 1 As shown, the check valve of the present invention includes a valve seat 1 and a valve disc 2, wherein the valve disc 2 rotates along the rotating shaft 4 through a rotating rod 3 fixedly connected thereto. Under the action of the valve, its sealing surface is closely matched with the sealing surface of the valve seat 1, thus closing the valve and preventing the medium from flowing backward. The present invention also includes a damper 5, the damper 5 is rotatably hingedly installed on the inner cavity wall of the valve seat 1, and its end is connected with the valve disc 2 through flexible parts such as chains or wire ropes 6 .

[0014] like figure 2 As shown, the damper 5 includes a rear cover 51 and a cylinder body 52. ​​A piston 53 is arranged in the cylinder body 52, and a piston rod 54 is connected to the pis...

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PUM

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Abstract

The invention discloses a check valve comprising a valve seat and a valve flap, in particular, the check valve comprises a damper arranged on the inner cavity wall of the valve seat, wherein the end part of the damper are connected with the valve flap through a flexible element. The damper produces reverse resistance to the valve flap when the valve flap approaches the closed position of the valve flap; the closing speed of the valve flap is slowed down, and the impact force to the sealing surface of the valve seat is reduced. The check valve has a simple structure, can effectively eliminate the impact and water hammer between the valve flap and the sealing seat, and prevents the media leakage in the valve cavity.

Description

technical field [0001] The invention relates to a valve, in particular to a check valve widely used in flowing liquid pipelines. Background technique [0002] Check valves are also called one-way valves, which can prevent downstream media from flowing backwards and are widely used in pipeline systems. The existing general-purpose swing check valve is provided with a disc-shaped valve disc in the valve seat, which can rotate around the rotating shaft provided in the valve seat. When the fluid medium in the pipeline flows back, the valve disc Under the action of the backflow medium, its sealing surface is closely matched with the sealing surface of the valve seat, so that the valve can be closed quickly and prevent the backflow of the medium. However, when the valve is closed, the sealing surface of the disc impacts the sealing surface of the valve seat at a high speed due to the fast flow of the medium back and the high instantaneous pressure, causing damage to the sealing s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/03F16K47/02F16K31/12F16F9/19
Inventor 胡金木
Owner JIANGSU YUANYANG VALVE INTELLIGENT CONTROL CO LTD
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