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Check valve structure

A check valve and cavity technology, applied in the field of liquid check valve structure, can solve the problems of short service life, inconvenient assembly, many parts, etc., and achieve the effect of ingenious structure design, prevention of sewage backflow, and fewer parts.

Inactive Publication Date: 2009-02-11
浙江世进水控股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of check valve structure uses many parts, which is inconvenient to assemble, and the spring is thin and easy to corrode, with high failure rate and short service life

Method used

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Embodiment Construction

[0024] Such as figure 2 , 3 As shown in and 4, a check valve structure includes a joint body 1, and the joint body is provided with a first cavity 11 communicating up and down. Here, there may be one, two or more through holes. At the same time, the joint body 1 is also provided with a second cavity 12 that directly communicates with the side of the joint body. The second cavity 12 communicates with the first cavity 11 through a connecting hole 13, and the mouth of the connecting hole 13 is movably equipped with a piston 2. The length of the piston 2 placed in the connecting hole 13 is less than the depth of the connecting hole 13. Here, in order to ensure the sealing of the mouth of the piston 2 and the connecting hole 13, a sealing surface 21 is provided at the connection between the two. In this embodiment, the second cavity 12 has a structure of four air holes, which are evenly distributed around the circumference, and here, the number of air holes can also be one, two ...

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Abstract

The invention discloses a check valve structure which comprises a fittings body that is provided with two cavities and a piston; wherein, a first cavity is communicated with the two ends of the fittings body, and a second cavity is communicated with the lateral surface of the fittings body; the second cavity is communicated with the first cavity by a connecting hole; the piston is movably arranged at the opening part of the connecting hole, and a sealing surface is arranged in the connecting part of the two; the length of the piston in the connecting hole is shorter than the depth of the connecting hole. Owing to the defect of the existing check valve, the invention redesigns non-return structure, adopts a principle of directly removing a valve body or the vacuum in a water pipe to solve the problem of reverse pumping of polluted water, and has the advantages of smart design, little parts and simple and reliable structure.

Description

technical field [0001] The invention relates to a check valve structure, which is especially suitable for the check valve structure in the aspect of liquid. Background technique [0002] In people's life, the phenomenon of sudden water cut-off occurs from time to time when the joint body is opened. At the moment of water cut-off, due to the flow inertia of the liquid, when the fluid in the front part of the joint body suddenly stops, the liquid in the back part will continue to flow. As a result, a vacuum will be generated in the cavity of the joint body, causing sewage to flow back, polluting the joint body or corroding parts in the joint body. In order to avoid the occurrence of this phenomenon, people often connect and arrange a check valve structure at the water outlet. [0003] Existing check valve structure, as the check valve of publication number CN2821326, its structure is as follows figure 1 As shown, it includes valve body 1', valve core 2', spring 3' and spring...

Claims

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Application Information

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IPC IPC(8): F16K15/02
Inventor 周礼黄晓峰艾金辉林岳华陈长珠
Owner 浙江世进水控股份有限公司
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