CN204254008U - Early warning type backflow preventer - Google Patents
Early warning type backflow preventer Download PDFInfo
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- CN204254008U CN204254008U CN201420616760.0U CN201420616760U CN204254008U CN 204254008 U CN204254008 U CN 204254008U CN 201420616760 U CN201420616760 U CN 201420616760U CN 204254008 U CN204254008 U CN 204254008U
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- backflow preventer
- inlet valve
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Abstract
The invention provides a kind of early warning type backflow preventer, comprise housing, described housing is provided with water intake, water outlet and discharge opening, and correspondence is provided with inlet valve, outlet valve and drain valve, described inlet valve comprises valve plate I and valve plate II, and point two-stage seals described water intake; Also comprise the elastic sealing device be connected with drain valve, described housing cavity body is divided into inner chamber and exocoel by described elastic sealing device, described inner chamber is only communicated with the cavity between described valve plate I and valve plate II by the passage on described housing, and described exocoel is communicated with described water intake, water outlet; Also comprise Pressure testing alarm, detect inner chamber, exocoel, water intake and water outlet pressure differential pressure everywhere, when pressure reduction is abnormal, give the alarm.The beneficial effect of the invention is: multistage non-return backflow preventer effectively can prevent the waste of water resources, stops improper sluicing; And Pressure testing alarm, can realize automatic alarm during hydraulic pressure exception.
Description
Technical field
The invention belongs to valve field, especially relates to a kind of early warning type backflow preventer.
Background technique
Current municipal water supply pressure transient, the water intake pressure of backflow preventer is caused to 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 the phenomenon that intermittently sluices (particularly when backflow preventer downstream is without water) in such backflow preventer, cause the waste of water resources.This just needs a kind of structure, when normal water supply when water intake despite pressure fluctuations, intermittently opening of drain valve can be prevented, simultaneously when medium occurs to flow backwards and backflow preventer water inlet safety check damages or poorly sealed time can open rapidly drain valve and release refluence water, effectively prevent water quality from flowing backwards and enter water supply network, and when a failure occurs it can automatic alarm.
Summary of the invention
The problem that the invention will solve avoids when pressure of supply water fluctuates, and drain valve is opened automatically, cuts the waste, and realizes automatic alarm.
For solving the problems of the technologies described above, the technological scheme that the invention adopts is: early warning type backflow preventer, comprise housing, described housing is provided with water intake, water outlet and discharge opening, and correspondence is provided with inlet valve, outlet valve and drain valve, described inlet valve comprises valve plate I and valve plate II, and point two-stage seals described water intake;
Also comprise the elastic sealing device be connected with drain valve, described housing cavity body is divided into inner chamber and exocoel by described elastic sealing device, described inner chamber is only communicated with the cavity between described valve plate I and valve plate II by the passage on described housing, described exocoel, when inlet valve, outlet valve are opened, is communicated with described water intake, water outlet;
Also comprise Pressure testing alarm, described Pressure testing alarm comprises detector, data processing system alarming controller and alarm buzzer, described detector detects inner chamber, exocoel, water intake and water outlet pressure differential pressure everywhere, described detector is connected with the described data processing system of outside, described data processing system is connected with described alarming controller, and described alarming controller is connected with described alarm buzzer.
Preferably, described drain valve is fixed on enclosure interior, described drain valve inside comprises drain valve seat, sluicing valve rod assembly and sluicing resetting means, described drain valve seat is fixed on housing, one end of described sluicing valve rod assembly is movably arranged on described drain valve seat, and discharge opening is closed by drain valve valve plate by its other end, and described sluicing valve rod is provided with sluicing resetting means, described sluicing valve rod through described elastic sealing device, and is fixed with it.
Preferably, described inlet valve also comprises inlet valve seat, water inlet valve rod and water inlet resetting means, one end of described water inlet valve rod is successively through described water inlet resetting means, inlet valve seat, valve plate I and valve plate II, described valve plate II is fixedly connected with described water inlet valve rod, described valve plate I is flexibly connected with described water inlet valve rod, be provided with elastic device between described valve plate II and described valve plate I, described water inlet resetting means is connected with fixing inlet valve seat on the housing.
Preferably, described inlet valve, outlet valve and drain valve can freely be dismantled.
Preferably, described elastic sealing device is rolling diaphragm.
Preferably, described detection alarm device can be sent to long-range for signal on computer or mobile phone.
The advantage that the invention has and good effect are:
Owing to adopting technique scheme, inlet valve is provided with two pieces of valve plates, when normal water supply and backflow preventer downstream are dead head condition, now inlet valve two pieces of valve plates are all in closed condition, lead to the channel enclosed of cavity between described valve plate I and valve plate II, inner chamber becomes an airtight cavity, and pressure is P2.When outlet valve damages, the chamber pressure P3 of enclosure interior equals the pressure P 4 of water outlet, will relatively rise by intake pressure P1 when water outlet pressure rises for a certain reason, namely Δ P=(P1-P3) reduces, when inlet valve two pieces of valve plates intact and when there is no jam inner chamber be airtight cavity, drain valve is in closed condition, can not sluice, and prevents the waste of water resources; When any one piece of valve plate of inlet valve be damaged or jam and occur water quality flow backwards time, inner chamber is communicated with the cavity of water intake or enclosure interior, and refluence water is released in drain valve unlatching in time, avoids the pollution of refluence water quality to water inlet water quality.
In like manner, if water intake pressure reduces for a certain reason or decompression time, Δ P reduce or become negative value, when inlet valve two pieces of valve plates intact and when there is no jam inner chamber be airtight cavity, drain valve is in closed condition, can not sluice, and prevents the waste of water resources; When any one piece of valve plate of inlet valve be damaged or jam and occur water quality flow backwards time, inner chamber is communicated with the cavity of water intake or enclosure interior, and refluence water is released in drain valve unlatching in time, avoids the pollution of refluence water quality to water inlet water quality.
And Pressure testing alarm, can realize automatic alarm during hydraulic pressure exception.
Accompanying drawing explanation
In order to be illustrated more clearly in the invention embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only the embodiment of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the invention;
Fig. 2 is the structural representation of drain valve part in the invention.
Embodiment
Below in conjunction with the accompanying drawing in the invention embodiment, be clearly and completely described the technological scheme in the invention embodiment, obviously, described embodiment is only the invention part embodiment, instead of whole embodiments.Based on the embodiment in the invention, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the invention protection.
Set forth a lot of detail in the following description so that fully understand the invention, but the invention can also adopt other to be different from alternate manner described here to implement, those skilled in the art can do similar popularization under the condition without prejudice to the invention intension, and therefore the invention is not by the restriction of following public specific embodiment.
Secondly; the invention is described in detail in conjunction with schematic diagram; when describing the invention embodiment in detail; for ease of explanation; the sectional drawing of indication device part structure can be disobeyed general ratio and be made partial enlargement; and described schematic diagram is example, it should not limit the scope of the invention protection at this.In addition, the three-dimensional space of length, width and height should be comprised in actual fabrication.
As depicted in figs. 1 and 2, the invention comprises housing, described housing is provided with water intake, water outlet and discharge opening, and correspondence is provided with inlet valve 1, outlet valve 2 and drain valve 3, it is characterized in that: described inlet valve 1 comprises valve plate I 11 and valve plate II 12, and point two-stage seals described water intake;
Also comprise the elastic sealing device be connected with drain valve, described housing cavity body is divided into inner chamber 31 and exocoel 32 by described elastic sealing device, described inner chamber 31 is only communicated with the cavity between described valve plate I 11 and valve plate II 12 by the passage on described housing, described exocoel 32, when inlet valve 1, outlet valve 2 are opened, is communicated with described water intake, water outlet;
Also comprise Pressure testing alarm, described Pressure testing alarm comprises detector, data processing system alarming controller and alarm buzzer, described detector detects inner chamber 31, exocoel 32, water intake and water outlet pressure differential pressure everywhere, described detector is connected with the described data processing system of outside, described data processing system is connected with described alarming controller, and described alarming controller is connected with described alarm buzzer.
Described drain valve 3 is fixed on enclosure interior, described drain valve 3 inside comprises drain valve seat 33, sluicing valve rod assembly 34 and sluicing resetting means, described drain valve seat 33 is fixed on housing, one end of described sluicing valve rod assembly 34 is movably arranged on described drain valve seat 33, discharge opening is closed by drain valve valve plate by its other end, described sluicing valve rod 34 is provided with sluicing resetting means, and described sluicing valve rod 34 through described elastic sealing device, and is fixed with it.
Described inlet valve 1 also comprises inlet valve seat, water inlet valve rod and water inlet resetting means, one end of described water inlet valve rod is successively through described water inlet resetting means, inlet valve seat, valve plate I 11 and valve plate II 12, described valve plate II 12 is fixedly connected with described water inlet valve rod, described valve plate I 11 is flexibly connected with described water inlet valve rod, be provided with elastic device between described valve plate II 12 and described valve plate I 11, described water inlet resetting means is connected with fixing inlet valve seat on the housing.
Described inlet valve 1, outlet valve 2 and drain valve 3 can freely be dismantled, easy access.
Described elastic sealing device is rolling diaphragm, can save space.
During normal water inlet, it is movable that pressure of supply water P1 orders about described valve plate I 11, water is made to enter inner chamber 31 by passage, push down diaphragm, described drain valve 3 is caused to be closed, along with the increase of intake pressure, press water pushes described valve plate II 12 open, water is normal through backflow preventer, described drain valve 3 cuts out and does not sluice, and now water intake pressure P 1 equals chamber pressure P2, there is a pressure difference Δ P between the pressure P 3 of the cavity of P1 and enclosure interior, as P1-P3> Δ P, drain valve cuts out, and as P1-P3≤Δ P, drain valve is opened.
When backflow preventer is in dead head condition and water intake decompression or water intake pressure produce fluctuation, described valve plate I 11 and valve plate II 12 are all in closed condition, described inner chamber 31 is air-tight state, and in described inner chamber 31, medium can not pass in and out, and described drain valve 3 is in closed condition.
When damaging when described outlet valve or occur to flow backwards because of other situations, the chamber pressure P3 of enclosure interior increases, if now valve plate I 11 and valve plate II 12 do not have jam or damage, then drain valve 3 is in closed condition, and drain valve 3 can not open sluicing; If valve plate I 11 and valve plate II 12 have jam or damage, then, during P1-P3< Δ p, drain valve 3 will be opened, and sluices.
The invention can realize, and in water inlet process, when pressure of supply water P1 fluctuates, the state that drain valve is also cutting out, prevents the waste of water resources; And when occurring to flow backwards, can sluice in time, avoiding the pollution to water inlet water quality.
Differential pressure change between Pressure testing alarm can realize two monitoring points and provide alarm signal.Under normal circumstances, certain pressure difference value is all there is before and after valve plate at different levels, and upper lower limit value can be set according to product actual conditions arbitrarily to this pressure difference value, exceed the upper limit or send alarm signal in limited time lower than lower monitoring pressure difference before and after each valve plate, alarm host machine will be blown a whistle and reported to the police and light alarm indicator lamp, until pressure recover is normal or just understand stop alarm after power cutoff.When before and after certain one-step valve plate, reporting to the police appears in pressure difference, drain valve can not sluice, and before and after only having secondary or the above valve plate of secondary, pressure difference value just can open sluicing lower than drain valve during lower limit.
Pressure testing alarm dials the telephone number set automatically after also can arranging warning, allow administrative staff know and occur extremely.
Above an embodiment of the invention has been described in detail, but described content being only the preferred embodiment of the invention, the practical range for limiting the invention can not being considered to.All equalization changes done according to the invention application range with improve, within the patent covering scope that still all should belong to the invention.
Claims (6)
1. early warning type backflow preventer, comprise housing, described housing is provided with water intake, water outlet and discharge opening, and correspondence is provided with inlet valve (1), outlet valve (2) and drain valve (3), it is characterized in that: described inlet valve (1) comprises valve plate I (11) and valve plate II (12), and point two-stage seals described water intake;
Also comprise the elastic sealing device be connected with drain valve, described housing cavity body is divided into inner chamber (31) and exocoel (32) by described elastic sealing device, described inner chamber (31) is only communicated with the cavity between described valve plate I (11) and valve plate II (12) by the passage on described housing, described exocoel (32), when inlet valve (1), outlet valve (2) are opened, is communicated with described water intake, water outlet;
Also comprise Pressure testing alarm, described Pressure testing alarm comprises detector, data processing system alarming controller and alarm buzzer, described detector detects inner chamber (31), exocoel (32), water intake and water outlet pressure differential pressure everywhere, described detector is connected with the described data processing system of outside, described data processing system is connected with described alarming controller, and described alarming controller is connected with described alarm buzzer.
2. early warning type backflow preventer according to claim 1, it is characterized in that: described drain valve (3) is fixed on enclosure interior, described drain valve (3) inside comprises drain valve seat (33), sluicing valve rod assembly (34) and sluicing resetting means, described drain valve seat (33) is fixed on housing, one end of described sluicing valve rod assembly (34) is movably arranged on described drain valve seat (33), discharge opening is closed by drain valve valve plate by its other end, described sluicing valve rod (34) is provided with sluicing resetting means, described sluicing valve rod (34) is through described elastic sealing device, and fix with it.
3. early warning type backflow preventer according to claim 1 and 2, it is characterized in that: described inlet valve (1) also comprises inlet valve seat, water inlet valve rod and water inlet resetting means, one end of described water inlet valve rod is successively through described water inlet resetting means, inlet valve seat, valve plate I (11) and valve plate II (12), described valve plate II (12) is fixedly connected with described water inlet valve rod, described valve plate I (11) is flexibly connected with described water inlet valve rod, elastic device is provided with between described valve plate II (12) and described valve plate I (11), described water inlet resetting means is connected with fixing inlet valve seat on the housing.
4. early warning type backflow preventer according to claim 1 and 2, is characterized in that: described inlet valve (1), outlet valve (2) and drain valve (3) can freely be dismantled.
5. early warning type backflow preventer according to claim 1 and 2, is characterized in that: described elastic sealing device is rolling diaphragm.
6. early warning type backflow preventer according to claim 1 and 2, is characterized in that: described detection alarm device can be sent to long-range for signal on computer or mobile phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420616760.0U CN204254008U (en) | 2014-10-23 | 2014-10-23 | Early warning type backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420616760.0U CN204254008U (en) | 2014-10-23 | 2014-10-23 | Early warning type backflow preventer |
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| CN204254008U true CN204254008U (en) | 2015-04-08 |
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| CN201420616760.0U Active CN204254008U (en) | 2014-10-23 | 2014-10-23 | Early warning type backflow preventer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042122A (en) * | 2015-08-26 | 2015-11-11 | 天津市塘沽沃特斯阀门有限公司 | Water-saving minitype backflow preventer |
| 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 |
| CN110255666A (en) * | 2019-06-20 | 2019-09-20 | 西安热工研究院有限公司 | A method of prevent high flow rate mixed bed ion exchange resin from flowing backward |
| CN110332341A (en) * | 2019-08-23 | 2019-10-15 | 德尔保定智能流体有限公司 | A kind of backflow preventer |
| CN113063008A (en) * | 2021-03-30 | 2021-07-02 | 铜陵兴荣阀门管件有限公司 | Single-diaphragm low-resistance backflow preventer |
| CN113532554A (en) * | 2021-06-21 | 2021-10-22 | 中恒水务科技有限公司 | Water affair backflow prevention monitoring system and backflow prevention method thereof |
-
2014
- 2014-10-23 CN CN201420616760.0U patent/CN204254008U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042122A (en) * | 2015-08-26 | 2015-11-11 | 天津市塘沽沃特斯阀门有限公司 | Water-saving minitype backflow preventer |
| 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 |
| CN110255666A (en) * | 2019-06-20 | 2019-09-20 | 西安热工研究院有限公司 | A method of prevent high flow rate mixed bed ion exchange resin from flowing backward |
| CN110332341A (en) * | 2019-08-23 | 2019-10-15 | 德尔保定智能流体有限公司 | A kind of backflow preventer |
| CN113063008A (en) * | 2021-03-30 | 2021-07-02 | 铜陵兴荣阀门管件有限公司 | Single-diaphragm low-resistance backflow preventer |
| CN113063008B (en) * | 2021-03-30 | 2024-01-26 | 铜陵兴荣阀门管件有限公司 | Single-diaphragm low-resistance backflow preventer |
| CN113532554A (en) * | 2021-06-21 | 2021-10-22 | 中恒水务科技有限公司 | Water affair backflow prevention monitoring system and backflow prevention method thereof |
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