CN102691337A - Backflow prevention device - Google Patents
Backflow prevention device Download PDFInfo
- Publication number
- CN102691337A CN102691337A CN2012102111813A CN201210211181A CN102691337A CN 102691337 A CN102691337 A CN 102691337A CN 2012102111813 A CN2012102111813 A CN 2012102111813A CN 201210211181 A CN201210211181 A CN 201210211181A CN 102691337 A CN102691337 A CN 102691337A
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- Prior art keywords
- housing
- slider
- water
- barrier film
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
The present invention relates to the supply equipment technical field, especially a kind of device that current flow backwards in the pipe network that prevents that is used for water supply network.
Background technology
At present, the domestic supply equipment that is used for high residential building in water pump group out-of-work moment, reservoir or the water tank pressure phenomenon less than terminal resident family siphon pressure can occur in the pipe of water supply network, causes current to flow backwards and causes the secondary pollution at water source; In addition, under the situation of the frequent switch of the terminal resident family's water pipe of pipe network, can cause that also current flow backwards moment in terminal resident family water pipe, produce pipe vibration and destructive water hammer, cause the damage of supply equipments such as pipeline and water valve.
Summary of the invention
Problem to be solved by this invention provides a kind of anti-backflow device, occurs the problem that current flow backwards to solve when existing water supply network produces negative pressure, can alleviate Analysis of Pipe Vibrations simultaneously.
In order to address the above problem, technical scheme of the present invention is: this anti-backflow device comprises the housing that is provided with water inlet and delivery port, and said housing cavity is dwindled from the middle part along the water outlet direction gradually; A hinged slider on the inwall of said housing, said slider comprise a housing and are installed on the soft barrier film of said outer circle mouth; Be provided with lug boss in the said housing, said slider overlap joint is on said lug boss, and said slider hides the head piece of crossing of said lug boss formation.
In the technique scheme, more concrete scheme can be: said soft barrier film can also be the mantle of elastomeric material.Said soft barrier film is the polyvinyl chloride mantle.Said housing is the ball-type housing.
Owing to adopted technique scheme, the present invention compared with prior art has following beneficial effect:
1, this anti-backflow device adopts the mantle of clamping in housing to make the buffering slider, will get lodged in the slider place of housing from the flow backwards current of housing into of delivery port, when preventing negative pressure to occur in the water supply network, occurs the phenomenon that current flow backwards in the pipe;
2, adopt and to have the elastomeric polyvinyl chloride mantle of high ductibility or elastomeric elastomeric material is made soft barrier film;, tap water forms water pocket when flowing backwards through slider; The buffering method of this flexibility; It is rigid in the vibration that produces owing to tap water receives to have alleviated pipeline, has reduced the harm of vibration to pipeline, has increased the application life of pipeline and water facilities.
Description of drawings
Fig. 1 is the sectional view of the embodiment of the invention one;
Fig. 2 is the sectional view of the embodiment of the invention two.
The specific embodiment
Implement the present invention is made further detailed description below in conjunction with accompanying drawing:
Anti-backflow device shown in Figure 1 comprises that an end is provided with the housing 1 that water inlet 2 and the other end are provided with delivery port 3, and this housing 1 is the ball-type housing, and this housing 1 cavity dwindles from the middle part along the water outlet direction gradually, can increase the effect of buffering like this; Be hinged with a slider in the housing 1; Said slider comprises a housing 4; Crimping and one soft barrier film 5 is installed in the middle of the frame mouth of this housing 4 through rivet; This soft barrier film 5 uses the polyvinyl chloride mantle with obdurability and ductility, (said in other embodiments soft barrier film can also be the mantle of elastomeric material); Be provided with lug boss in the housing 1, slider overlaps on this lug boss, and slider hides the head piece of crossing of said lug boss formation.When current when water inlet 2 gets into housings 1, current are washed the slider that housing 4 and soft barrier film 5 form open and are flow through housing 1; When negative pressure occurring in the pipe network, current advance housing 1 from delivery port 3 refluences, because the lug boss behind the housing 4 withstands housing 4; Current are trapped in housing 4 and barrier film 5 places; Can't pass through housing 1, play the anti counter-flowing effect, adopt soft elastic membrane to make the buffering slider; When tap water flows backwards through slider, form water pocket, it is rigid in the vibration that produces owing to tap water receives to have alleviated pipeline.
One end of the housing 1 of anti-backflow device shown in Figure 2 is provided with water inlet 11, and its delivery port 12 is arranged on the end perpendicular to the water inlet direction, can also use other part-structures such as embodiment one as union elbow.
Claims (4)
1. anti-backflow device, it is characterized in that: comprise the housing that is provided with water inlet and delivery port, said housing cavity is dwindled from the middle part along the water outlet direction gradually; A hinged slider on the inwall of said housing, said slider comprise a housing and are installed on the soft barrier film of said outer circle mouth; Be provided with lug boss in the said housing, said slider overlap joint is on said lug boss, and said slider hides the head piece of crossing of said lug boss formation.
2. anti-backflow device according to claim 1 is characterized in that: said soft barrier film is the mantle of elastomeric material.
3. anti-backflow device according to claim 1 is characterized in that: said soft barrier film is the polyvinyl chloride mantle.
4. according to claim 1,2 or 3 described anti-backflow devices, it is characterized in that: said housing is the ball-type housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102111813A CN102691337A (en) | 2012-06-26 | 2012-06-26 | Backflow prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102111813A CN102691337A (en) | 2012-06-26 | 2012-06-26 | Backflow prevention device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102691337A true CN102691337A (en) | 2012-09-26 |
Family
ID=46857062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102111813A Pending CN102691337A (en) | 2012-06-26 | 2012-06-26 | Backflow prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102691337A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08312871A (en) * | 1995-05-19 | 1996-11-26 | Kurimoto Ltd | Water hammer buffering device |
| CN2292198Y (en) * | 1997-03-11 | 1998-09-23 | 北京融洋技术研究所 | Elastic membrane type check valve |
| CN2578635Y (en) * | 2002-10-06 | 2003-10-08 | 石景东 | Check valve with flexible outward segment |
| US7128090B1 (en) * | 2005-09-01 | 2006-10-31 | Tozen Corporation | Water-hammer preventing unit for check valve |
| CN201696683U (en) * | 2010-01-27 | 2011-01-05 | 铜陵国方水暖科技有限责任公司 | Built-in buffering check valve |
| CN202767170U (en) * | 2012-06-26 | 2013-03-06 | 广西佛泵科技有限公司 | Backflow prevention device |
-
2012
- 2012-06-26 CN CN2012102111813A patent/CN102691337A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08312871A (en) * | 1995-05-19 | 1996-11-26 | Kurimoto Ltd | Water hammer buffering device |
| CN2292198Y (en) * | 1997-03-11 | 1998-09-23 | 北京融洋技术研究所 | Elastic membrane type check valve |
| CN2578635Y (en) * | 2002-10-06 | 2003-10-08 | 石景东 | Check valve with flexible outward segment |
| US7128090B1 (en) * | 2005-09-01 | 2006-10-31 | Tozen Corporation | Water-hammer preventing unit for check valve |
| CN201696683U (en) * | 2010-01-27 | 2011-01-05 | 铜陵国方水暖科技有限责任公司 | Built-in buffering check valve |
| CN202767170U (en) * | 2012-06-26 | 2013-03-06 | 广西佛泵科技有限公司 | Backflow prevention device |
Non-Patent Citations (1)
| Title |
|---|
| 张金海等: "新型铰接式单向阀流场数值模拟分析", 《流体机械》, vol. 38, no. 6, 30 June 2010 (2010-06-30) * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120926 |