CN103511686B - A kind of backflow preventer structure - Google Patents
A kind of backflow preventer structure Download PDFInfo
- Publication number
- CN103511686B CN103511686B CN201310428497.2A CN201310428497A CN103511686B CN 103511686 B CN103511686 B CN 103511686B CN 201310428497 A CN201310428497 A CN 201310428497A CN 103511686 B CN103511686 B CN 103511686B
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- Prior art keywords
- valve
- valve plate
- described valve
- water
- water inlet
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Classifications
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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
Abstract
The present invention provides a kind of backflow preventer structure, including housing and be positioned at the water intaking valve of described enclosure interior, outlet valve, drain valve and main valve stem, also include elastic sealing device, described enclosure interior is divided into main chamber and controls two, chamber cavity by described elastic sealing device, wherein with water inlet, outlet and discharge opening these three opening on the shell wall in main chamber, described water intaking valve, outlet valve and drain valve are separately mounted to these three opening part, one end of described main valve stem is connected with described drain valve, and the other end is connected with described elastic sealing device.The invention has the beneficial effects as follows: owing to adopting technique scheme, water inlet is provided with two pieces of valve plates, under the dead head condition of water supply process, during pressure of supply water life fluctuation, controlling chamber and be in air-tight state, drain valve is in the closed position, it is prevented that the waste of water resource；And when arbitrary valve plate damages and occurs to flow backwards, it is possible to sluice in time, it is to avoid pollution to water inlet water quality.
Description
Technical field
The present invention relates to field of check valves, especially relate to a kind of backflow preventer structure.
Background technology
Current municipal water supply pressure transient, the water inlet pressure causing backflow preventer can produce fluctuation, when inlet pressure undulating value is more 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 the pressure of centre and meet Δ p value, in use can there is the phenomenon that discontinuously sluices (particularly when backflow preventer downstream is without water) in such backflow preventer, cause the waste of water resource.This is not the sole mass problem of product, but municipal water supply working condition pressure changing value exceedes the unlatching of backflow preventer drain valve and arranges value, causes what the unlatching of backflow preventer drain valve caused.Therefore backflow preventer is all refused to use by a lot of Running-water Companies, and one of reason dislikes water waste serious exactly.If but do not install backflow preventer additional and can not fundamentally ensure that again water quality is not subjected to pollute, this is accomplished by a kind of structure, when normal water supply when water inlet despite pressure fluctuations, discontinuously opening of drain valve can be prevented, drain valve can be opened rapidly when refluence occurs medium and backflow preventer water inlet check-valves damages or be poorly sealed simultaneously and release refluence water, effectively prevent water quality from flowing backwards and enter water supply network.
Summary of the invention
It is an object of the invention to provide a kind of simple in construction, safe and reliable backflow preventer structure.
The technical scheme is that a kind of backflow preventer structure, including housing and be positioned at the water intaking valve of described enclosure interior, outlet valve, drain valve and main valve stem, also include elastic sealing device, described enclosure interior is divided into main chamber and controls two, chamber cavity by described elastic sealing device, wherein with water inlet, outlet and discharge opening these three opening on the shell wall in main chamber, described water intaking valve, outlet valve and drain valve are separately mounted to these three opening part, one end of described main valve stem is connected with described drain valve, and the other end is connected with described elastic sealing device；
Described housing is provided with passage I, and described control chamber is connected by described passage I with described water inlet；
Described water intaking valve includes valve plate I and valve plate II, and the described passage I opening in described water inlet, when not being stressed, is sealed by described valve plate I；Described water inlet is sealed by described valve plate II when not being stressed.
Preferably, described water intaking valve also includes valve seat, valve rod and resetting means, one end of described valve rod sequentially passes through described resetting means, valve seat, valve plate I and valve plate II, described valve plate II is connected with the fixing of described valve rod, described valve plate I is connected with described valve handle activity, being provided with elastic device between described valve plate II and described valve plate I, described resetting means is connected with fixing valve seat on the housing.
Preferably, the inner chamber of described valve seat has place's step, described valve plate I is stuck in described step place, and the step of described valve seat and described valve plate I contact outside is provided with a circle projection I, when described valve plate I contacts with protruding I, sealing effectiveness can be played, gap is had between described valve plate I and the inwall of described valve seat, one side contacts of the bottom of described valve seat and described valve plate II, and the bottom of described valve seat is provided with a circle projection II, when described valve plate II contacts with protruding II, sealing effectiveness can be played, the described passage I opening in described water inlet is positioned on described valve seat, and enclose between projection described two.
Preferably, described resetting means be end cap and and spring, described end cap is fixed on the other end of described valve rod, and one end of described spring props up described end cap, and the other end is fixed on described valve seat.
Preferably, described elastic sealing device is rubber diaphragm.
Preferably, it is provided with sealing ring between described valve plate I and described valve rod.
Preferably, the elastic device arranged between described valve plate II and described valve plate I is several little springs.
The present invention has the advantage that and has the benefit effect that
Owing to adopting technique scheme, water intaking valve is provided with two pieces of valve plates, normal water supply and backflow preventer downstream when being dead head condition, now two pieces of valve plates of water intaking valve are in closed mode, passage I is closed by valve plate I, controls chamber and becomes an airtight cavity, and pressure is P2.When outlet valve damages, main cavity pressure P3 is equal to the pressure P 4 of outlet, will relatively rise by intake pressure P1 when outlet pressure rises for a certain reason, namely Δ P=(P1-P3) reduces, controlling chamber when two pieces of valve plates of water intaking valve are intact and do not have jam is airtight cavity, and main valve stem can not move upward, and namely drain valve is closed, will not sluice, it is prevented that the waste of water resource；When any one piece of valve plate of water intaking valve is damaged or jam and when occurring water quality to flow backwards, controlling chamber and connect with water inlet or main chamber, main valve stem moves upward and drives drain valve unlatching to release refluence water in time, it is to avoid the pollution to water inlet water quality of the refluence water quality.
In like manner, if water inlet pressure reduces for a certain reason or during decompression, Δ P reduces or becomes negative value, controlling chamber when two pieces of valve plates of water intaking valve are intact and do not have jam is airtight cavity, main valve stem can not move upward, namely drain valve is closed, and will not sluice, it is prevented that the waste of water resource；When any one piece of valve plate of water intaking valve is damaged or jam and when occurring water quality to flow backwards, controlling chamber and connect with water inlet or main chamber, main valve stem moves upward and drives drain valve unlatching to release refluence water in time, it is to avoid the pollution to water inlet water quality of the refluence water quality.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of valve seat and valve plate junction in the present invention.
In figure:
1, outlet valve 2, drain valve 3, main valve stem 4, elastic sealing device
5, main chamber 6, control chamber 7, water inlet 8, outlet
9, discharge opening 10, passage I 101, valve seat 102, valve rod
103, valve plate I 104, valve plate II 105, resetting means
Detailed description of the invention
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 is positioned at the water intaking valve of described enclosure interior, outlet valve 1, drain valve 2 and main valve stem 3, also include elastic sealing device 4, described enclosure interior is divided into main chamber 5 and controls 6 two, chamber cavity by described elastic sealing device 4, wherein with water inlet 7, outlet 8 and discharge opening 9 these three opening on the shell wall in main chamber 5, described water intaking valve, outlet valve 1 and drain valve 2 are separately mounted to these three opening part, 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 rubber diaphragm.
Described water intaking valve includes valve seat 101, valve rod 102, valve plate I 103, valve plate II 104 and resetting means 105, one end of described valve rod 102 sequentially passes through described resetting means 105, valve seat 101, valve plate I 103 and valve plate II 104, described valve plate II 104 is connected with described the fixing of valve rod 102, described valve plate I 103 is flexibly connected with described valve rod 102, being provided with elastic device 106 between described valve plate II 104 and described valve plate I 103, described resetting means 105 is connected with fixing valve seat 101 on the housing；
It is provided with sealing ring between described valve plate I 103 and described valve rod 102.
Described resetting means 105 be end cap and and spring, described end cap is fixed on the other end of described valve rod 102, and one end of described spring props up described end cap, and the other end is fixed on described valve seat 101.
The elastic device 106 arranged 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 control chamber 6 is connected by described passage I 10 with described water inlet 7, and the described passage I 10 opening at described water inlet 7 place is positioned on described valve seat 101, and it is sealed by described valve plate I 103 when not being stressed；
Described water inlet 7 is sealed by described valve plate II 104 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 the step of described valve seat 101 and described valve plate I 103 contact outside is provided with a circle projection I, when described valve plate I 103 contacts with protruding I, sealing effectiveness can be played, gap is had 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, sealing effectiveness can be played, the described passage I 10 opening in described water inlet is positioned on described valve seat 101, and enclose between projection described two.
When normally intaking, 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 and control chamber 6, push down diaphragm, described main valve stem 3 downward actuation is driven to cause that described drain valve 2 cuts out, increase along with intake pressure, press water pushes described valve plate II 104 open, water is normal through backflow preventer, described drain valve 2 cuts out and does not sluice, now water inlet pressure P 1 is equal to controlling cavity pressure P2, a pressure differential Δ P is there is between the pressure P 3 of P1 and main intracavity, as P1-P3 > Δ P time drain valve close, as P1-P3 Δ P, drain valve is opened.
When backflow preventer is in dead head condition and water inlet decompression or water inlet pressure produces fluctuation, described valve plate I 103 and valve plate II 104 are in closed mode, described passage II is closed, described control chamber 6 is air-tight state, in described control chamber 6, medium can not pass in and out, main valve stem 3 will not produce motion, and described drain valve 2 is closed.
When described outlet valve 1 damages or because when refluence occurs other situations, main cavity pressure P3 increase, if now valve plate I 103 and valve plate II 104 do not have jam or damage, then drain valve 2 is closed, and drain valve will not open sluicing；If valve plate I 103 and valve plate II 104 have jam or damage, then 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 is it is achieved that in water inlet process, when pressure of supply water P1 fluctuates, drain valve is also in the state cut out, it is prevented that the waste of water resource；And when occurring to flow backwards, it is possible to sluice in time, it is to avoid pollution to water inlet water quality.
The present invention has been described in detail by above example, but described content is only presently preferred embodiments of the present invention, it is impossible to be considered the practical range for limiting the present invention.All equalizations made according to the present patent application scope change and improvement etc., all should still belong within the patent covering scope of the present invention.
Claims (7)
1. a backflow preventer structure, including housing and the water intaking valve being positioned at described enclosure interior, outlet valve (1), drain valve (2) and main valve stem (3), it is characterized in that: also include elastic sealing device (4), described enclosure interior is divided into main chamber (5) and controls (6) two, chamber cavity by described elastic sealing device (4), wherein with water inlet (7) on the shell wall of main chamber (5), outlet (8) and discharge opening (9) these three opening, described water intaking valve, outlet valve (1) and drain valve (2) are separately mounted to these three opening part, 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 control chamber (6) is connected by described passage I (10) with described water inlet (7)；
Described water intaking valve includes valve plate I (103) and valve plate II (104), and the described passage I (10) opening at described water inlet (7) place, when not being stressed, is sealed by described valve plate I (103)；Described water inlet (7) is sealed by described valve plate II (104) when not being stressed.
2. backflow preventer structure according to claim 1, it is characterized in that: described water intaking valve also includes valve seat (101), valve rod (102) and resetting means (105), one end of described valve rod (102) sequentially passes through described resetting means (105), valve seat (101), valve plate I (103) and valve plate II (104), described valve plate II (104) is fixing with described valve rod (102) to be connected, described valve plate I (103) is flexibly connected with described valve rod (102), elastic device (106) it is provided with between described valve plate II (104) and described valve plate I (103), described resetting means (105) is connected with fixing valve seat (101) on the housing.
null3. backflow preventer structure according to claim 2，It is characterized in that: the inner chamber of described valve seat (101) has place's step，Described valve plate I (103) is stuck in described step place，And the step of described valve seat (101) and described valve plate I (103) contact outside is provided with a circle projection I，When described valve plate I (103) contacts with protruding I，Sealing effectiveness can be played，Gap is had between the inwall of described valve plate I (103) and 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，Sealing effectiveness can be played，The described passage I (10) opening in described water inlet is positioned on described valve seat (101)，And enclose between projection described two.
4. the backflow preventer structure according to Claims 2 or 3, it is characterized in that: described resetting means (105) is end cap and spring, described end cap is fixed on the other end of described valve rod (102), and one end of described spring props up described end cap, and the other end is fixed on described valve seat (101).
5. backflow preventer structure according to claim 1 and 2, it is characterised in that: described elastic sealing device (4) is rubber diaphragm.
6. the backflow preventer structure according to Claims 2 or 3, it is characterised in that: it is provided with sealing ring between described valve plate I (103) and described valve rod (102).
7. the backflow preventer structure according to Claims 2 or 3, it is characterised in that: the elastic device (106) arranged between described valve plate II (104) and described valve plate I (103) is several little springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310428497.2A CN103511686B (en) | 2013-09-17 | 2013-09-17 | A kind of backflow preventer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310428497.2A CN103511686B (en) | 2013-09-17 | 2013-09-17 | A kind of backflow preventer structure |
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| Publication Number | Publication Date |
|---|---|
| CN103511686A CN103511686A (en) | 2014-01-15 |
| CN103511686B true CN103511686B (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310428497.2A Active CN103511686B (en) | 2013-09-17 | 2013-09-17 | A kind of backflow preventer structure |
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| CN (1) | CN103511686B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982682B (en) * | 2014-05-26 | 2016-07-06 | 天津市国威给排水设备制造有限公司 | A kind of on-bne repair backflow preventer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5478928U (en) * | 1977-11-14 | 1979-06-05 | ||
| EP0084754A1 (en) * | 1982-01-26 | 1983-08-03 | SOCLA SA Société dite | Back flow preventer for hydraulic conduits |
| 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 |
| CN102261499A (en) * | 2011-05-17 | 2011-11-30 | 天津市国威给排水设备制造有限公司 | Double-diaphragm backflow preventer without external piping and capable of preventing abnormal water drainage of water draining opening |
| CN103104724A (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 with spring pre-tightening force adjustable |
| CN203477486U (en) * | 2013-09-17 | 2014-03-12 | 天津市倒流防止器制造有限公司 | Backflow prevention device structure |
-
2013
- 2013-09-17 CN CN201310428497.2A patent/CN103511686B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5478928U (en) * | 1977-11-14 | 1979-06-05 | ||
| EP0084754A1 (en) * | 1982-01-26 | 1983-08-03 | SOCLA SA Société dite | Back flow preventer for hydraulic conduits |
| 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 |
| CN102261499A (en) * | 2011-05-17 | 2011-11-30 | 天津市国威给排水设备制造有限公司 | Double-diaphragm backflow preventer without external piping and capable of preventing abnormal water drainage of water draining opening |
| CN103104724A (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 with spring pre-tightening force adjustable |
| CN203477486U (en) * | 2013-09-17 | 2014-03-12 | 天津市倒流防止器制造有限公司 | Backflow prevention device structure |
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| CN103511686A (en) | 2014-01-15 |
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