CN103511687A - Novel backflow prevention device structure - Google Patents
Novel backflow prevention device structure Download PDFInfo
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- CN103511687A CN103511687A CN201310429371.7A CN201310429371A CN103511687A CN 103511687 A CN103511687 A CN 103511687A CN 201310429371 A CN201310429371 A CN 201310429371A CN 103511687 A CN103511687 A CN 103511687A
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- Prior art keywords
- valve
- water
- main
- elastic sealing
- outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention provides a novel backflow prevention device structure. The novel backflow prevention device structure comprises a case, a water inlet valve, a water outlet valve, a water drainage valve and a main valve rod, wherein the water inlet valve, the water outlet valve, the water drainage valve and the main valve rod are arranged inside the case. The novel backflow prevention device structure further comprises an elastic sealing device. The elastic sealing device divides the interior of the case into a main cavity and a control cavity. A water inlet, a water outlet and a water drainage opening are formed in the case wall of the main cavity. The water inlet valve is installed on the water inlet, the water outlet valve is installed on the water outlet, and the water drainage valve is installed on the water drainage opening. One end of the main valve rod is connected with the water drainage valve, and the other end of the main valve rod is connected with the elastic sealing device. The novel backflow prevention device structure has the advantages that by adopting the technical scheme, the water inlet is provided with two valve plates, under the zero flow state of the water supply process, when the water supply pressure fluctuates, the control cavity is in a sealed state, the water drainage valve is arranged in the closed position, and waste of the water resource is prevented. When one valve plate is damaged and backflow occurs, the water can be drained in time, and pollution to water on the water inlet is avoided.
Description
Technical field
The present invention relates to field of check valves, especially relate to a kind of novel reverse flow preventing device structure.
Background technique
Current municipal water supply pressure transient, cause the water intake pressure of backflow preventer can produce fluctuation, when inlet pressure undulating value is greater than the drain valve starting differential pressure value Δ p of backflow preventer, the discharge opening of general backflow preventing structure can be opened to reduce middle pressure and meet Δ p value, in use can there is interrupted sluicing phenomenon when water (particularly in backflow preventer downstream not) in backflow preventer like this, causes the waste of water resources.This is not the sole mass problem of product, but municipal water supply working condition pressure changing value surpasses backflow preventer drain valve, opens settings, causes the unlatching of backflow preventer drain valve to cause.Therefore a lot of water utilities all refuse to use to backflow preventer, and one of reason is exactly to dislike water waste serious.If can not fundamentally not guarantee that again water quality is not polluted but do not install backflow preventer additional, this just needs a kind of structure, when normal water supply when there is fluctuation in water intake pressure, can prevent intermittently opening of drain valve, when medium occur to flow backwards and backflow preventer water inlet safety check damages or can open rapidly drain valve when poorly sealed, release refluence water simultaneously, effectively prevent from that water quality from flowing backwards to enter water supply network.
Summary of the invention
The object of this invention is to provide a kind of simple in structure, safe and reliable backflow preventer structure.
Technological scheme of the present invention is: a kind of novel reverse flow preventing device structure, comprise housing and the inlet valve that is positioned at described enclosure interior, outlet valve, drain valve and main valve stem, also comprise elastic sealing device, described elastic sealing device is divided into main chamber and two cavitys of control chamber by described enclosure interior, wherein on the shell wall in main chamber with water intake, these three openings of water outlet and discharge opening, described inlet valve, outlet valve and drain valve are arranged on respectively this three openings, one end of described main valve stem is connected with described drain valve, the other end is connected with described elastic sealing device,
Described housing is provided with passage I, and described passage I is communicated with described control chamber with described water intake, and described passage I is connecting port in the outlet at described water intake inwall place;
Described inlet valve is provided with seal arrangement A and B, described water intake is sealed, and lay respectively at the front and back position of described connecting port;
As water inlet hydraulic pressure P1 > 0 and while being less than setting value, only have described seal arrangement A to open, as P1 > during=setting value, described seal arrangement A and B open.
Advantage and good effect that the present invention has are:
Owing to adopting technique scheme, inlet valve is provided with seal arrangement A and B, when normal water supply and backflow preventer downstream are dead head condition, now seal arrangement A and B are all in closed condition, seal arrangement A is by the sealing of passage I, and control chamber becomes an airtight cavity, and pressure is P2.When outlet valve damages, main cavity pressure P3 equals the pressure P 4 of water outlet, when water outlet pressure rises for a certain reason, intake pressure P1 rises relatively, be that Δ P=(P1-P3) reduces, when inlet valve seal arrangement A and B is intact and while there is no jam control chamber be airtight cavity, main valve stem can not move upward, drain valve is in closed condition, can not sluice, prevent the waste of water resources; When the device any sealing together of inlet valve is damaged or jam and when water quality occurring flowing backwards, control chamber is communicated with water intake Huo Zhu chamber, main valve stem moves upward and drives drain valve unlatching to release in time refluence water, has avoided the pollution of refluence water quality to water inlet water quality.
In like manner, if water intake pressure reduces for a certain reason or during decompression, Δ P reduces or becomes negative value, when inlet valve seal arrangement A and B is intact and while there is no jam control chamber be airtight cavity, main valve stem can not move upward, be drain valve in closed condition, can not sluice, prevent the waste of water resources; When the device any sealing together of inlet valve is damaged or jam and when water quality occurring flowing backwards, control chamber is communicated with water intake Huo Zhu chamber, main valve stem moves upward and drives drain valve unlatching to release in time refluence water, has avoided the pollution of refluence water quality to water inlet water quality.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of valve seat and valve plate joint in the present invention.
In figure:
1, outlet valve 2, drain valve 3, main valve stem 4, elastic sealing device
5 ,Zhu chambeies 6, control chamber 7, water intake 8, water outlet
9, discharge opening 10, passage I 101, valve seat 102, valve rod
103, valve plate I 104, valve plate II 105, resetting means
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 housing and the inlet valve, outlet valve 1, drain valve 2 and the main valve stem 3 that are positioned at described enclosure interior, also comprise elastic sealing device 4, described elastic sealing device 4 is divided into main chamber 5 and 6 two cavitys of control chamber by described enclosure interior, wherein on the shell wall in main chamber 5 with water intake 7, water outlet 8 and discharge opening 9 these three openings, described inlet valve, outlet valve 1 and drain valve 2 are arranged on respectively this three openings, one end of described main valve stem 3 is connected with described drain valve 2, and the other end is connected with described elastic sealing device 4; Described elastic sealing device 4 is elastomer diaphragm.、
Described seal arrangement A is valve plate I 103, and described seal arrangement B is valve plate II 104.
Described inlet valve comprises valve seat 101, valve rod 102, valve plate I 103, valve plate II 104 and resetting means 105, described valve rod 102 one end is successively through described resetting means 105, valve seat 101, valve plate I 103 and valve plate II 104, described valve plate II 104 is fixedly connected with described valve rod 102, described valve plate I 103 is flexibly connected with described valve rod 102, between described valve plate II 104 and described valve plate I 103, be provided with elastic device 106, described resetting means 105 is connected with the valve seat 101 being fixed on described housing;
Described resetting means 105 be end cap and and spring, described end cap is fixed on the other end of described valve rod 102, one end of described spring props up described end cap, the other end is fixed on described valve seat 101.
The elastic device 106 arranging between described valve plate II 104 and described valve plate I 103 is several little springs.
Described housing is provided with passage I 10, and described passage I 10 is communicated with described control chamber 6 with described water intake 7, and described passage I 10 is positioned on described valve seat 101 at the opening at described water intake 7 places, and described valve plate I 103 seals it when not being stressed;
Described valve plate II 104 seals described water intake 7 when not being stressed.
The inner chamber of described valve seat 101 has place's step, described valve plate I 103 is stuck in described step place, and described valve seat 101 is provided with a circle projection I with the step of described valve plate I 103 outer side contacts, when described valve plate I 103 contacts with protruding I, can play sealing effect, gapped between described valve plate I 103 and the inwall of described valve seat 101, one side contacts of the bottom of described valve seat 101 and described valve plate II 104, and the bottom of described valve seat 101 is provided with a circle projection II, when described valve plate II 104 contacts with protruding II, can play sealing effect, the opening of described passage I 10 in described water inlet is positioned on described valve seat 101, and between described two circle projections.
During normal water inlet, it is movable to the right that pressure of supply water P1 orders about described valve plate I 103, open the passage II on described valve seat 101, make water enter control chamber 6, push down diaphragm, drive the action downwards of described main valve stem 3 to cause described drain valve 2 to be closed, increase along with intake pressure, press water is pushed described valve plate II 104 open, water normally passes through backflow preventer, described drain valve 2 cuts out and does not sluice, now water intake pressure P 1 equals control chamber pressure P 2, between pressure P 3 in P1Yu Zhu chamber, there is a pressure difference Δ P, as P1-P3 > drain valve cuts out during Δ P, when P1-P3≤Δ P, drain valve is opened.
When backflow preventer is when dead head condition and water intake decompression or water intake pressure produce fluctuation, described valve plate I 103 and valve plate II 104 are all in closed condition, described passage II is sealed, described control chamber 6 is air-tight state, the interior medium of described control chamber 6 can not pass in and out, main valve stem 3 can not produce motion, and described drain valve 2 is in closed condition.
When described outlet valve 1 damages or because other situations are while occurring to flow backwards, main cavity pressure P3 increases, if now valve plate I 103 and valve plate II 104 do not have jam or damage, drain valve 2 is in closed condition, and drain valve can not opened sluicing; If valve plate I 103 and valve plate II 104 have jam or damage, during P1-P3 < Δ p, described diaphragm moves upward and drives described main valve stem 3 to move up, and opens drain valve 2, sluices.
The present invention can realize, and in water inlet process, in the situation that pressure of supply water P1 fluctuates, drain valve, also at the state of cutting out, prevents the waste of water resources; And when occurring to flow backwards, can sluice in time, avoid the pollution of Liao Dui water inlet water quality.
Above embodiment has been described in detail the present invention, 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 equalization variations of doing according to the present patent application scope and improvement etc., within all should still belonging to patent covering scope of the present invention.
Claims (1)
1. a novel reverse flow preventing device structure, comprise housing and the inlet valve that is positioned at described enclosure interior, outlet valve (1), drain valve (2) and main valve stem (3), it is characterized in that: also comprise elastic sealing device (4), described elastic sealing device (4) is divided into main chamber (5) and (6) two cavitys of control chamber by described enclosure interior, wherein on the shell wall of main chamber (5) with water intake (7), these three openings of water outlet (8) and discharge opening (9), described inlet valve, outlet valve (1) and drain valve (2) are arranged on respectively this three openings, one end of described main valve stem (3) is connected with described drain valve (2), the other end is connected with described elastic sealing device (4),
Described housing is provided with passage I (10), and described passage I (10) is communicated with described control chamber (6) with described water intake (7), and described passage I (10) is connecting port in the outlet at described water intake (7) inwall place;
Described inlet valve is provided with seal arrangement A and B, described water intake (7) is sealed, and lay respectively at the front and back position of described connecting port;
When water intake (7) is located hydraulic pressure P1 > 0 and while being less than setting value, only have described seal arrangement A to open, as P1 > during=setting value, described seal arrangement A and B open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310429371.7A CN103511687B (en) | 2013-09-17 | 2013-09-17 | A kind of Novel backflow prevention device structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310429371.7A CN103511687B (en) | 2013-09-17 | 2013-09-17 | A kind of Novel backflow prevention device structure |
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|---|---|
| CN103511687A true CN103511687A (en) | 2014-01-15 |
| CN103511687B CN103511687B (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310429371.7A Active CN103511687B (en) | 2013-09-17 | 2013-09-17 | A kind of Novel backflow prevention device structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178635A (en) * | 2017-07-01 | 2017-09-19 | 宁波华成阀门有限公司 | A kind of copper modeling composite pressure reducing formula backflow preventer and its manufacture method |
| CN109307100A (en) * | 2018-11-30 | 2019-02-05 | 天津市国威给排水设备制造有限公司 | A kind of backflow preventer sluicing judgment method and backflow preventer |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11223268A (en) * | 1998-02-06 | 1999-08-17 | Tabuchi Corp | Method and device for detecting discharged fluid for reduced pressure type reverse-flow preventing device |
| CN2381857Y (en) * | 1999-08-17 | 2000-06-07 | 北京融洋技术研究所 | Liquid backflow preventor |
| US6443184B1 (en) * | 2000-07-25 | 2002-09-03 | Conbraco Industries, Inc. | Radially loaded, poppet-type check valve |
| CN2744741Y (en) * | 2004-08-19 | 2005-12-07 | 李四波 | Antipollution block valve |
| CN2789538Y (en) * | 2005-03-01 | 2006-06-21 | 张意 | Full-automatic energy-saving water valve without maintenance |
| CN201288864Y (en) * | 2008-10-29 | 2009-08-12 | 张明亮 | Welding stainless steel backflow preventer |
| CN101614292A (en) * | 2009-07-21 | 2009-12-30 | 武汉大禹阀门制造有限公司 | Backflow preventer |
| CN101749460A (en) * | 2008-12-10 | 2010-06-23 | 刘永 | Dual-membrane micro-resistant ultrashort backflow preventer |
| CN101985989A (en) * | 2010-10-12 | 2011-03-16 | 杭州春江阀门有限公司 | Backflow preventer with fault signal emitting device |
| CN203477487U (en) * | 2013-09-17 | 2014-03-12 | 天津市倒流防止器制造有限公司 | Novel backflow preventer structure |
-
2013
- 2013-09-17 CN CN201310429371.7A patent/CN103511687B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11223268A (en) * | 1998-02-06 | 1999-08-17 | Tabuchi Corp | Method and device for detecting discharged fluid for reduced pressure type reverse-flow preventing device |
| CN2381857Y (en) * | 1999-08-17 | 2000-06-07 | 北京融洋技术研究所 | Liquid backflow preventor |
| US6443184B1 (en) * | 2000-07-25 | 2002-09-03 | Conbraco Industries, Inc. | Radially loaded, poppet-type check valve |
| CN2744741Y (en) * | 2004-08-19 | 2005-12-07 | 李四波 | Antipollution block valve |
| CN2789538Y (en) * | 2005-03-01 | 2006-06-21 | 张意 | Full-automatic energy-saving water valve without maintenance |
| CN201288864Y (en) * | 2008-10-29 | 2009-08-12 | 张明亮 | Welding stainless steel backflow preventer |
| CN101749460A (en) * | 2008-12-10 | 2010-06-23 | 刘永 | Dual-membrane micro-resistant ultrashort backflow preventer |
| CN101614292A (en) * | 2009-07-21 | 2009-12-30 | 武汉大禹阀门制造有限公司 | Backflow preventer |
| CN101985989A (en) * | 2010-10-12 | 2011-03-16 | 杭州春江阀门有限公司 | Backflow preventer with fault signal emitting device |
| CN203477487U (en) * | 2013-09-17 | 2014-03-12 | 天津市倒流防止器制造有限公司 | Novel backflow preventer structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178635A (en) * | 2017-07-01 | 2017-09-19 | 宁波华成阀门有限公司 | A kind of copper modeling composite pressure reducing formula backflow preventer and its manufacture method |
| CN109307100A (en) * | 2018-11-30 | 2019-02-05 | 天津市国威给排水设备制造有限公司 | A kind of backflow preventer sluicing judgment method and backflow preventer |
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| CN103511687B (en) | 2017-01-04 |
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