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Check valve

A technology of check valve and cavity, which is applied in the field of check valves, can solve the problems such as stopping the pump, closing the valve, water hammer, etc., and achieves the effect of no vibration and small water loss

Pending Publication Date: 2018-08-14
ANHUI REDSTAR VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, when stopping the pump and closing the valve, the problem of water hammer caused by stopping the pump and closing the valve cannot be eliminated.

Method used

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Embodiment Construction

[0048] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0049] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0050] Techniques and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques and devices should be considered part of the description.

[0051] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have different values.

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Abstract

The invention discloses a check valve. The check valve comprises a first cavity and a second cavity, wherein the first cavity is used for liquid flow, and the second cavity is located at one end of the first cavity. A liquid inlet, a liquid outlet and a butterfly plate which is located between the liquid inlet and the liquid outlet are arranged on the first cavity. An elastic member is arranged inthe second cavity. A pivot is arranged on the butterfly plate. The butterfly plate is pivoted into the first cavity through the pivot. The check valve is further provided with a connecting rod. One end of the connecting rod is movably connected to the lower portion of the pivot on the butterfly plate, and the other end of the connecting rod is arranged in the second cavity in a sliding mode and abuts against the elastic member. The connecting rod comprises an isolation member for slidably sealing the second cavity and the first cavity, and the isolation member can move in the second cavity. The water pressure action area of the isolation member is smaller than the water pressure action area of the butterfly plate facing the liquid outlet. Therefore, the zero flow velocity can be traced automatically, and the zero flow velocity of the check valve can be closed.

Description

technical field [0001] The invention relates to the field of valves, in particular to a check valve. Background technique [0002] Check valve is one of many pipeline valves, which is widely used to control the one-way flow of liquid medium in pipelines. In the drainage system, the traditional check valve generally adopts a through-flow structure design, and is usually installed at the liquid outlet of the water pump to prevent the water from flowing backwards and causing damage to the water pump. , Open and close sensitive and so on. [0003] However, in the prior art, the problem of water hammer caused by stopping the pump and closing the valve cannot be eliminated when the pump is stopped and the valve is closed. Especially in special cases, in relatively large waterways, the water hammer problem is likely to cause great damage to pipelines and even electric pumps. [0004] Therefore, it is necessary to improve the existing check valve to overcome the above-mentioned d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/03F16K15/18
CPCF16K15/033F16K15/1821
Inventor 何锐韩安伟
Owner ANHUI REDSTAR VALVE
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