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Backflow prevention device

An anti-backflow and shell technology, which is applied in water supply devices, buildings, water supply main pipelines, etc., can solve problems such as water flow backflow, and achieve the effects of increasing service life, reducing hazards, and reducing vibration

Inactive Publication Date: 2012-09-26
GUANGXI FUBENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to provide an anti-backflow device to solve the problem of backflow of water flow when negative pressure is generated in the existing water supply pipe network, and at the same time reduce the vibration of the pipeline

Method used

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Examples

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Embodiment Construction

[0011] The present invention will be described in further detail below in conjunction with accompanying drawing implementation:

[0012] figure 1 The shown anti-backflow device includes a casing 1 with a water inlet 2 at one end and a water outlet 3 at the other end. The casing 1 is a spherical casing, and the cavity of the casing 1 gradually shrinks from the middle along the water outlet direction. This can increase the effect of buffering; there is an insulator hinged in the housing 1, and the insulator includes an outer frame 4, and the middle of the frame opening of the outer frame 4 is crimped and installed with a soft diaphragm 5 through a rivet, and the soft diaphragm 5 is used A polyvinyl chloride soft film with strong toughness and ductility (in other embodiments, the soft diaphragm can also be a soft film of rubber material); On the raised part, the isolation body covers the flow opening formed by the raised part. When the water flow enters the casing 1 from the wa...

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Abstract

The invention discloses a backflow prevention device, comprising a shell provided with a water inlet and a water outlet. A cavity of the shell is gradually reduced along a water outlet direction from a middle part; an isolation body is hinged on an inner wall of the shell; the isolation body comprises an outer frame and a flexible isolation membrane mounted at a frame opening of the outer frame; a convex part is arranged in the shell; the isolation body is erected on the convex part; and the isolation body shields an overflow opening formed by the convex part. With the adoption of the backflow prevention device provided by the invention, the problem of water backflow, caused by that the conventional water supply network has a negative pressure, can be solved; and meanwhile, the vibration of a pipeline can be reduced.

Description

technical field [0001] The invention relates to the technical field of water supply equipment, in particular to a device for preventing backflow of water in a water supply pipe network. Background technique [0002] At present, the water supply equipment used in high-rise residential buildings in China, when the water pump group stops working, the pressure of the water storage tank or water storage tank in the water supply pipe network will be lower than the pressure of the end household water pipe, resulting in secondary pollution of the water source due to backflow of water ;In addition, when the water pipes at the end of the pipe network are frequently switched on and off, the water will flow back from the water pipes at the end of the pipe instantly, resulting in pipe vibration and destructive water hammer, resulting in damage to water supply equipment such as pipes and water valves. Contents of the invention [0003] The problem to be solved by the present invention i...

Claims

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Application Information

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IPC IPC(8): E03B7/09
Inventor 黄文胜
Owner GUANGXI FUBENG TECH
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