Backflow preventing device

A technology of anti-backflow and valve body, which is applied in the direction of valve devices, control valves, functional valves, etc., can solve the problems of high manufacturing cost, complex structure, inconvenient installation and maintenance, etc., and achieve low manufacturing cost, small occupied space, Install covert effects
CN102486239AInactive Publication Date: 2012-06-06SHANDONG SHUANGLUN
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG SHUANGLUN
Publication Date
2012-06-06
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a backflow preventing device and relates to a fluid pipeline control device. A liquid inlet and a liquid outlet are respectively arranged in the upper end and the lower end of a valve body; a bracket is arranged in the valve body; a guide post is arranged on the bracket; a valve core is slidably arranged on the guide post; a spring is arranged between the upper end of the guide post and the valve core; a sealing gasket is arranged on the valve body at the lower side of the liquid inlet corresponding to the valve core; and a flange is arranged at the upper side of the valve body. The backflow preventing device disclosed by the invention is low in manufacturing cost and is simple and convenient for installation and maintenance; when the backflow preventing device is in use, the backflow preventing device is arranged in a liquid pipeline or a container inlet, so that the backflow preventing device is secretly arranged and is small in occupied space; the flange is arranged at the upper side of the valve body; and the installation direction is not limited.
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Description

technical field

[0001] The invention relates to a fluid pipeline control device, in particular to an anti-backflow device. Background technique

[0002] We know that in the existing fluid pipeline, the power source provides pressure for the fluid in the entire pipeline, so that the fluid in the pipeline flows in a specified direction. When the power source stops working or there is an abnormal situation in the pipeline, the fluid in the pipeline will often flow back. On the connection pipeline between the drinking water pipeline and the non-drinking water pipeline, and the water quality in the pipeline system For occasions with higher requirements, anti-backflow devices are required to avoid backflow pollution. Existing anti-backflow devices are various, but most of them have the disadvantages of complicated structure, high manufacturing cost, and inconvenient installation and maintenance. Contents of the invention

[0003] The technical problem solved by the present inv...

Claims

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