CN103115169B - Check valve structure of anti-backflow device - Google Patents
Check valve structure of anti-backflow device Download PDFInfo
- Publication number
- CN103115169B CN103115169B CN201210539428.4A CN201210539428A CN103115169B CN 103115169 B CN103115169 B CN 103115169B CN 201210539428 A CN201210539428 A CN 201210539428A CN 103115169 B CN103115169 B CN 103115169B
- Authority
- CN
- China
- Prior art keywords
- valve
- valve seat
- backflow device
- valve plate
- described valve
- 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.)
- Active
Links
Landscapes
- Check Valves (AREA)
Abstract
The invention provides a check valve structure of an anti-backflow device. The check valve structure of the anti-backflow device comprises a valve body, a valve seat and a valve plate, wherein the valve seat is embedded on an opening of the valve body and is fixed with the valve body, the right end face of the valve plate is matched with the right end face of the valve seat in a sealed mode, the left end face of the valve plate is provided with a ring-shaped protrusion, the top end of the ring-shaped protrusion bends outwards, and a semi-circle groove which is matched with the ring-shaped protrusion is formed in the inner wall of the valve seat. The check valve structure of the anti-backflow device has the advantages that with the technical scheme, opening pressure of the valve plate is increased, the normal work of the anti-backflow device in a zero-flow state can be guaranteed, and that too much head loss after the complete opening of the anti-backflow device cannot occur is guaranteed.
Description
Technical field
The present invention relates to a kind of backflow preventer check valve structure.
Background technique
Backflow preventer safety check relies on spring that valve plate is resetted, therefore when valve plate is in closed condition, spring has certain pretightening force, this pretightening force determines initial sealing value i.e. the Initial head losses of safety check, the loss of head of the little then valve of initial tension of spring is little, and the loss of head of the large then valve of initial pretightening force is large.In general, backflow preventer had not only required to have little loss of head but also require larger initial sealing value, both is conflicting, and obtain less loss of head and rely on the pretightening force reducing spring to realize, pretightening force reduces the Safety performance of backflow preventer after reducing.This just needs a kind of backflow preventer check valve structure not only having had high Safety performance but also had low loss of head.
Summary of the invention
The object of this invention is to provide the backflow preventer check valve structure that a kind of structure is simple, safe and reliable.
Technological scheme of the present invention is: a kind of backflow preventer check valve structure, comprise valve body, valve seat and valve plate, described valve seat is embedded in the opening of described valve body and fixes with described valve body, match with the right side of described valve seat and seal in the left side of described valve plate, the left side of described valve plate is provided with annular projection, the top of described annular projection is bent outwardly, and the inwall of described valve seat is provided with the half slot coordinated with described annular projection.
Preferably, the outer rim of described valve plate is surrounded by rubber layer, and described annular projection is positioned on described rubber layer, and is rubber quality.
The advantage that the present invention has and good effect are:
Owing to adopting technique scheme, the cracking pressure of valve plate can be improved, the normal work of backflow preventer under dead head condition can be ensured, the backflow preventer loss of head that unlikely generation is excessive after opening completely can be ensured again.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the partial enlarged drawing of annular projection in the present invention.
In figure:
1, valve body 2, valve seat 3, valve plate 4, rubber layer
5, spring
Embodiment
Below in conjunction with the drawings and the specific embodiments, the invention will be further described.
As depicted in figs. 1 and 2, the present invention includes valve body 1, valve seat 2 and valve plate 3, described valve seat 2 is embedded in the opening of described valve body 1 and fixes with described valve body 1, match with the right side of described valve seat 2 and seal in the left side of described valve plate 3, the left side of described valve plate 3 is provided with annular projection, the top of described annular projection is bent outwardly, and the inwall of described valve seat 2 is provided with the half slot coordinated with described annular projection.The outer rim of described valve plate 3 is surrounded by rubber layer 4, and described annular projection is positioned on described rubber layer 4, and is rubber quality.
During use, valve left end is intake, and under the effect of hydraulic pressure, described annular projection will be close to described valve seat 2 inwall, increase described valve plate 3 and will open required pressure, namely increase the initial sealing value of valve, produce larger loss of head; When pressure increase is to certain value, described annular projection leaves the half slot of described valve seat 2 inwall, and described valve plate 3 leaves described valve seat 2 sealing surface, valve opening, and the now loss of head of valve is determined by the spring force of spring 5.
Above embodiment is to invention has been detailed description, but described content is only preferred embodiment of the present invention, can not be considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (2)
1. a backflow preventer check valve structure, comprise valve body (1), valve seat (2) and valve plate (3), described valve seat (2) is embedded in the opening of described valve body (1) and fixes with described valve body (1), match with the right side of described valve seat (2) and seal in the left side of described valve plate (3), it is characterized in that: the left side of described valve plate (3) is provided with annular projection, the top of described annular projection is bent outwardly, and the inwall of described valve seat (2) is provided with the half slot coordinated with described annular projection.
2. backflow preventer check valve structure according to claim 1, is characterized in that: the outer rim of described valve plate (3) is surrounded by rubber layer (4), and described annular projection is positioned on described rubber layer (4), and is rubber quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210539428.4A CN103115169B (en) | 2012-12-11 | 2012-12-11 | Check valve structure of anti-backflow device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210539428.4A CN103115169B (en) | 2012-12-11 | 2012-12-11 | Check valve structure of anti-backflow device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103115169A CN103115169A (en) | 2013-05-22 |
| CN103115169B true CN103115169B (en) | 2015-04-08 |
Family
ID=48413583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210539428.4A Active CN103115169B (en) | 2012-12-11 | 2012-12-11 | Check valve structure of anti-backflow device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103115169B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251202A (en) * | 2008-03-24 | 2008-08-27 | 广东联塑科技实业有限公司 | One-way horizontal check valve |
| CN101324281A (en) * | 2008-07-24 | 2008-12-17 | 李习洪 | Novel reverse flow preventing device |
| CN202056363U (en) * | 2011-05-17 | 2011-11-30 | 天津市国威给排水设备制造有限公司 | Dual-diaphragm micro-resistance ultrashort backflow preventer |
| CN202937844U (en) * | 2012-12-11 | 2013-05-15 | 天津市国威给排水设备制造有限公司 | Check valve structure of backflow checker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040038319A (en) * | 2002-10-31 | 2004-05-08 | 손열삼 | Check valve |
-
2012
- 2012-12-11 CN CN201210539428.4A patent/CN103115169B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251202A (en) * | 2008-03-24 | 2008-08-27 | 广东联塑科技实业有限公司 | One-way horizontal check valve |
| CN101324281A (en) * | 2008-07-24 | 2008-12-17 | 李习洪 | Novel reverse flow preventing device |
| CN202056363U (en) * | 2011-05-17 | 2011-11-30 | 天津市国威给排水设备制造有限公司 | Dual-diaphragm micro-resistance ultrashort backflow preventer |
| CN202937844U (en) * | 2012-12-11 | 2013-05-15 | 天津市国威给排水设备制造有限公司 | Check valve structure of backflow checker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103115169A (en) | 2013-05-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2009123805A3 (en) | Methods and devices for isolating wellhead pressure | |
| CN202937844U (en) | Check valve structure of backflow checker | |
| CN103115169B (en) | Check valve structure of anti-backflow device | |
| CN204114254U (en) | self-closing stop valve | |
| CN105962790A (en) | Exhaust valve for sparkling water making machine | |
| CN206054891U (en) | A kind of improved automatic pressure regulator | |
| CN203757088U (en) | Pressure stabilizing check valve | |
| DK2859258T3 (en) | CURRENT CLAP SEAL WITH STEP INTERNAL SURFACE | |
| CN102954236A (en) | Stop valve based on high-tightness valve clack | |
| CN202580100U (en) | Two-way hard seal half ball valve | |
| CN104896157B (en) | Direct-power safety valve | |
| CN205423998U (en) | Safety valve | |
| CN201547342U (en) | Bivalve check valve | |
| CN205806588U (en) | The control valve controlled based on pressure medium | |
| CN203857075U (en) | Dual-seal ball valve | |
| CN204127409U (en) | Ultralow temperature pilot operated safety valve | |
| CN204127378U (en) | Floating valve seat | |
| CN204175985U (en) | Be provided with the butterfly valve of hydraulic sealing structure | |
| CN204664532U (en) | Direct-power safety valve | |
| CN202768897U (en) | Spherical valve seat | |
| CN203115192U (en) | Check valve | |
| CN203131139U (en) | Safety valve | |
| CN204253483U (en) | Deep fat relief valve | |
| CN204083451U (en) | For the switch valve of soda drinking machine | |
| CN202992213U (en) | Double sealing subsidiary stop valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |