CN103511687B - A kind of Novel backflow prevention device structure - Google Patents
A kind of Novel backflow prevention device structure Download PDFInfo
- Publication number
- CN103511687B CN103511687B CN201310429371.7A CN201310429371A CN103511687B CN 103511687 B CN103511687 B CN 103511687B CN 201310429371 A CN201310429371 A CN 201310429371A CN 103511687 B CN103511687 B CN 103511687B
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- Prior art keywords
- valve
- water
- sealing device
- water inlet
- main
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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
-
- 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 present invention provides a kind of Novel backflow prevention device 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, with water inlet, outlet and discharge opening these three opening on the shell wall in the most 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 using technique scheme, water inlet is provided with two pieces of valve plates, under the dead head condition of water supply process, during the raw fluctuation of pressure of supply water, controlling chamber and be in air-tight state, drain valve is in the closed position, prevents the waste of water resource；And when arbitrary valve plate damages and occurs to flow backwards, can 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 Novel backflow prevention device structure.
Background technology
Municipal water supply pressure transient, causes the water inlet pressure of backflow preventer can produce fluctuation, works as inlet-pressure at present
When fluctuation 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
Meeting Δ p value with the pressure in the middle of reducing, such backflow preventer in use can exist and discontinuously sluices phenomenon (particularly
When backflow preventer downstream is without water), cause the waste of water resource.This is not the sole mass problem of product, but municipal
Water supply condition change value of pressure exceedes the unlatching of backflow preventer drain valve and arranges value, causes backflow preventer drain valve to be opened and is made
Become.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
Not installing backflow preventer additional and can not fundamentally ensure that water quality is not contaminated again, this is accomplished by a kind of structure, at normal water supply
Time when water inlet despite pressure fluctuations, can prevent discontinuously opening of drain valve, occur to flow backwards and flow backwards to prevent when medium simultaneously
Device water inlet check-valves can be opened rapidly drain valve when damaging or be poorly sealed and release refluence water, effectively prevents water quality from flowing backwards and enters confession
Grid.
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 Novel backflow prevention device structure, including housing be positioned at described enclosure interior
Water intaking valve, outlet valve, drain valve and main valve stem, also include elastic sealing device, described elastic sealing device is by described housing
Inside is divided into main chamber and controls two, chamber cavity, on the shell wall in the most main chamber with water inlet, outlet and discharge opening this three
Individual opening, described water intaking valve, outlet valve and drain valve be separately mounted to these three opening part, and one end of described main valve stem is with described
Drain valve connects, 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, and described passage I exists
Outlet at described water inlet inwall is connected entrance；
Described water intaking valve is provided with sealing device A and B, seals described water inlet, and lays respectively at described connection
Position before and after Kou；
When water inlet hydraulic pressure P1 > 0 and less than setting value time, the most described sealing device A opens, and works as P1 >=setting value
Time, described sealing device A and B opens.
The present invention has the advantage that with good effect:
Owing to using technique scheme, water intaking valve is provided with under sealing device A and B, normal water supply and backflow preventer
When trip is for dead head condition, now sealing device A and B is in closed mode, and passage I is closed by sealing device A, controls chamber and becomes
Being an airtight cavity, pressure is P2.When outlet valve damages, and main cavity pressure P3 is equal to the pressure P4 of outlet, when outlet pressure
Will rise by intake pressure P1 relatively when power rises for a certain reason, i.e. Δ P=(P1-P3) reduces, when water intaking valve sealing device
A and B is intact and does not has to control chamber during jam to be airtight cavity, and main valve stem can not move upward, i.e. drain valve is closed,
Will not sluice, prevent the waste of water resource；When the device any sealing together of water intaking valve is damaged or jam and generation
When water quality flows backwards, controlling chamber and connect with water inlet or main chamber, main valve stem moves upward and drives drain valve unlatching to release refluence in time
Water, it is to avoid the refluence water quality pollution to water inlet water quality.
In like manner, if water inlet pressure reduces for a certain reason or during decompression, Δ P reduces or becomes negative value, works as water inlet
Valve sealing means A and B is intact and does not has to control chamber during jam to be airtight cavity, and main valve stem can not move upward, i.e. at drain valve
In closed mode, will not sluice, prevent the waste of water resource；Be damaged when the device any sealing together of water intaking valve or
Jam and occur water quality flow backwards time, control chamber connect with water inlet or main chamber, main valve stem move upward drive drain valve unlatching and
Time release refluence water, it is to avoid the refluence water quality pollution to water inlet water quality.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is valve seat and the structural representation of 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 accompanying drawings and detailed description of the invention 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, sluices
Valve 2 and main valve stem 3, also include elastic sealing device 4, and described enclosure interior is divided into main chamber 5 He by described elastic sealing device 4
Control 6 two, chamber cavity, with water inlet 7, outlet 8 and discharge opening 9 these three opening on the shell wall in the most 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 and described drain valve 2
Connecting, the other end is connected with described elastic sealing device 4；Described elastic sealing device 4 is rubber diaphragm.、
Described sealing device A is valve plate I 103, and described sealing device B is valve plate II 104.
Described water intaking valve includes valve seat 101, valve rod 102, valve plate I 103, valve plate II 104 and resetting means 105, described valve
One end of bar 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
Being connected with described the fixing of valve rod 102, described valve plate I 103 is flexibly connected with described valve rod 102, and described valve plate II 104 is with described
Being provided with elastic device 106 between valve plate I 103, described resetting means 105 is connected with fixing valve seat 101 on the 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, described
One end of 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, described
The passage I 10 opening at described water inlet 7 is positioned on described valve seat 101, and described valve plate I 103 when not being stressed to it
Seal；
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 step at, and described valve plate I 103 is stuck at described step, and described valve seat 101
It is provided with a circle projection I with the step of described valve plate I 103 contact outside, when described valve plate I 103 contacts with protruding I, permissible
Play sealing effectiveness, between described valve plate I 103 and the inwall of described valve seat 101, have gap, the bottom of described valve seat 101 and institute
State a side contacts of 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 is with protruding
During II contact, can play sealing effectiveness, 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 the most movable that pressure of supply water P1 orders about described valve plate I 103, opens the passage on described valve seat 101
II, make water enter and control chamber 6, push down diaphragm, drive described main valve stem 3 downward actuation to cause described drain valve 2 to be closed, along with entering
The increase of water pressure, press water pushes described valve plate II 104 open, and water is normal through backflow preventer, and described drain valve 2 cuts out and do not lets out
Water, now water inlet pressure P1 is equal to controlling cavity pressure P2, there is a pressure differential Δ P between the pressure P3 of P1 and main intracavity,
As P1-P3 > Δ P time drain valve close, as P1-P3 Δ P drain valve open.
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 be in closed mode, described passage II is closed, described control chamber 6 is air-tight state, described
In controlling chamber 6, medium can not pass in and out, and main valve stem 3 will not produce motion, and described drain valve 2 is closed.
When damaging when described outlet valve 1 or occur to flow backwards because of other situations, main cavity pressure P3 increases, 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
Move up, open drain valve 2, sluice.
The present invention is it is achieved that during water inlet, in the case of pressure of supply water P1 fluctuates, drain valve is also in cut out
State, prevents the waste of water resource；And when occurring to flow backwards, can sluice in time, it is to avoid dirt to water inlet water quality
Dye.
The present invention has been described in detail by above example, but described content is only presently preferred embodiments of the present invention, no
The practical range for limiting the present invention can be considered.All impartial changes made according to the present patent application scope and improvement etc., all
Within should still belonging to the patent covering scope of the present invention.
Claims (1)
1. a Novel backflow prevention device structure, including housing be positioned at the water intaking valve of described enclosure interior, outlet valve (1), let out
Water valve (2) and main valve stem (3), it is characterised in that: also including elastic sealing device (4), described elastic sealing device (4) is by described
Enclosure interior is divided into main chamber (5) and controls (6) two, chamber cavity, on the shell wall of the most main chamber (5) with water inlet (7), go out
The mouth of a river (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), and the other end is with described elastic sealing device (4) even
Connect；
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),
The outlet at described water inlet (7) inwall of the described passage I (10) is connected entrance；
Described water intaking valve is provided with sealing device A and B, seals described water inlet (7), and lays respectively at described connected entrance
Before and after position；
When water inlet (7) place hydraulic pressure P1 > 0 and less than setting value time, the most described sealing device A opens, as P1 >=setting value time,
Described sealing device A and B opens.
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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
|---|---|
| CN103511687A CN103511687A (en) | 2014-01-15 |
| CN103511687B true CN103511687B (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310429371.7A Active CN103511687B (en) | 2013-09-17 | 2013-09-17 | A kind of Novel backflow prevention device structure |
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| CN (1) | CN103511687B (en) |
Families Citing this family (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)
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|---|---|---|---|---|
| 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 |
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| CN103511687A (en) | 2014-01-15 |
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