CN101936412A - Right-angle backflow preventer - Google Patents
Right-angle backflow preventer Download PDFInfo
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- CN101936412A CN101936412A CN 201010236950 CN201010236950A CN101936412A CN 101936412 A CN101936412 A CN 101936412A CN 201010236950 CN201010236950 CN 201010236950 CN 201010236950 A CN201010236950 A CN 201010236950A CN 101936412 A CN101936412 A CN 101936412A
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- valve
- sealing gasket
- spring
- check valve
- backflow preventer
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Abstract
The invention relates to a right-angle backflow preventer, which is characterized by being provided with a backflow preventer body consisting of a valve body and a valve cover, wherein an inlet check valve, a water drain valve coaxial with the inlet check valve, and an outlet check valve which is vertical to the inlet check valve and the water drain valve are arranged in the backflow preventer body; a diaphragm is arranged between the valve body and the valve cover; an upper pressing plate is connected above the diaphragm and a lower pressing plate is connected below the diaphragm; and an annular through hole is formed among the diaphragm, the upper pressing plate and the lower pressing plate. The right-angle backflow preventer has reliable isolation performance and still can effectively prevent backflow from polluting a water source even if the seals of the two check valves are damaged under any working condition.
Description
Technical field
The present invention relates to a kind of valve, relate in particular to a kind of dirty stream isolating valve.
Background technique
Backflow preventer claims dirty stream isolating valve again, is the safety features of a kind of strictness polluted source when preventing that the Drinking Water pipeline from taking place to reflux.Decompression type backflow preventer is made up of the hydathode of two safety check that separate and a centre.Because its function admirable, reliable operation is widely adopted at present.What at present domestic relevant valve plant produced all is straight-through type, external also not being reported to rectangular shape.But find that in installation the orthogonal situation of connecting tube is of common occurrence, if adopt original straight-through type isolating valve, will cause the complexity of piping erection.
Summary of the invention
Main purpose of the present invention is to solve the existing in prior technology deficiency, thereby develops a kind of mutual vertically arranged rectangular shape backflow preventer of connecting tube that is applicable to.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of rectangular shape backflow preventer, it is characterized in that: have the backflow preventer body of forming by valve body and valve gap, be provided with inlet check valve in the described backflow preventer body, with the drain valve in the same axle center of inlet check valve, with inlet check valve, the vertically arranged outlet non-return valve of drain valve.
Technological scheme of the present invention can also be further perfect:
As preferably, be provided with diaphragm between described valve body and the valve gap, be connected with top board above the described diaphragm, be connected with press table below; The centre of described diaphragm, top board, press table is provided with manhole.
As preferably, described top board upper-end surface is provided with the annular sword limit that raises up along endoporus.
As preferably, be provided with boss in the middle of the lower end surface of described press table, it respectively forms a spring seat on inside and outside footpath, between spring seat on the described press table external diameter and the valve body spring one is housed.
As preferably, the lower end mouth of described valve body is provided with the annular sword limit that raises up, and described annular sword has sealing gasket two on the limit, and baffle plate two is arranged above the sealing gasket two; Described sealing gasket two, baffle plate two are connected on the valve rod, and described valve rod two ends respectively are provided with guide plate, between described baffle plate two and the press table spring two are installed; Drainage check valve is formed on described valve rod, guide plate, sealing gasket two, baffle plate two, spring one, spring two and valve body lower end choma shape sword limit.
As preferably, described inlet check valve is made up of guide plate, valve rod, baffle plate one, sealing gasket one, top board annular sword limit, upper end and spring two; On the annular sword limit of top board the sealing gasket one that is connected on the valve rod is installed, baffle plate one is arranged on the sealing gasket one, described valve rod is installed on the guide plate.
As preferably, described outlet non-return valve is by guide sleeve, guide rod, spring three, and the annular sword limit of sealing gasket three and valve body side is formed; Described side of valve body is provided with annular sword limit, and there is sealing gasket three front, described annular sword limit, and described sealing gasket three is installed on the guide rod, and described guide rod is connected in the guide sleeve, between described guide sleeve and sealing gasket three spring three is housed.
The invention has the beneficial effects as follows: the interrupting performance of backflow preventer is reliable, under any operating mode, even all destroyeds of the sealing of two safety check, the danger of the polluted source that also can effectively prevent to flow backwards.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present invention.
Description of reference numerals: 1 jump ring, 2 guide plates, 3 valve rods, 4 baffle plates, one, 5 sealing gasket, one, 6 top board, 7 valve gaps, 8 diaphragms, 9 valve bodies, 10 press tables, 11 springs, one, 12 spring two, 13 baffle plates, two, 14 sealing gaskets, two, 15 sealing gaskets, three, 16 springs, three, 17 guide rods, 18 guide sleeves.
Embodiment
Below by embodiment also in conjunction with the accompanying drawings, technological scheme of the present invention is further described in detail.
Embodiment:
Rectangular shape backflow preventer as shown in Figure 1, has the backflow preventer body of forming by valve body and valve gap, be provided with inlet check valve in the backflow preventer body, with the drainage check valve in the same axle center of inlet check valve, with inlet check valve, the vertically arranged outlet non-return valve of drainage check valve.
Drainage check valve is formed on valve rod 3, guide plate 2, sealing gasket 2 14, baffle plate 2 13, spring 1, spring 2 12 and valve body 9 lower end mouth annular sword limit.
Inlet check valve and drainage check valve link.
During valve rod 3 motion, by two guide plates 2 guiding up and down, two guide plates 2 and guide sleeve 18 are fixing by jump ring 1 respectively; The interior annulus of diaphragm 8 is compressed by top board 6, press table 10 usefulness bolts, and the outer toroid of diaphragm 8 is compressed with bolt by the flange of valve gap 7 and valve body 9, and the epicoele of diaphragm 8 is the suction side of inlet check valve, and cavity of resorption is an intermediate cavity; Valve rod 3 passes the center hole of top board 6, diaphragm 8, press table 1 joint; One end of spring 2 12 is located in the inboard of press table 10 boss, and the other end is located on the corresponding shaft shoulder in valve rod 3 belows, and therefore the tendency that inlet check valve is closed is arranged all the time; One end of spring 1 is located in the outside of press table 10 boss, and the other end is located on the shoulder of the interior corresponding hole of valve body, and therefore the tendency that drain valve is opened is arranged all the time.
During normal water supply, the high pressure water of import overcomes the resistance of spring 1, spring 2 12, pushes away diaphragm 8 and moves down, and inlet check valve is opened, and water enters intermediate cavity, overcomes the resistance of spring 3 16 simultaneously, and outlet non-return valve is also opened.When high pressure water entered intermediate cavity, owing to overcome the resistance and the overcurrent loss of head of spring 11, spring 2 12, the hydraulic pressure P2 of intermediate cavity was lower than snout cavity hydraulic pressure P1, so sealing gasket 2 14 is pressed on the respective annular sword limit in the valve body drain shut valve.
Pipeline no user behind valve, water is static, as long as import hydraulic pressure is constant, promptly has certain pressure reduction, drain shut valve before and after the inlet check valve.
If import hydraulic pressure descends, when pressure reduction drops to certain value before and after the inlet check valve, at first under the acting in conjunction of spring 1, spring 2 12, diaphragm 8 rises, be pressed on until sealing gasket 1 on the annular sword limit of top board 6 upper ends, impacting force equals the pretightening force of spring 2 12, and inlet check valve is closed.If import hydraulic pressure continues to descend, when pressure reduction was lower than the pressure of spring 1, under the effect of spring 1, diaphragm 8 continued to rise, and drainage check valve is opened, and the water of intermediate cavity is discharged from drain opening.When pressure release pressure reduction before and after the inlet check valve returned to certain value, drainage check valve was closed again automatically.
When import hydraulic pressure reduces to zero or during negative pressure, drainage check valve is opened fully, baffle plate 1 rose to corresponding anchor ring in the valve gap 7 and contact this moment, and air enters intermediate cavity from drain opening, forms the air partition, has prevented siphon refluence phenomenon.
During inlet pressure P1, if the outlet non-return valve good seal, high pressure water can not flow backwards, drain shut valve, not draining before the ductwork pressure P3 behind the valve raise to surpass valve; If producing, the outlet non-return valve seal break-off leaks, intermediate cavity hydraulic pressure raises, when being lower than certain value with the import differential water pressures, diaphragm 8 rises, and inlet check valve is closed, drainage check valve is opened simultaneously, the draining pressure release, a large amount of air enter intermediate cavity from drain opening and form the air partition, if the sealing of inlet check valve also destroys simultaneously at this moment, owing to, therefore can not flow backwards back into the mouth safety check from the high pressure water pressure release that outlet non-return valve is refunded.
From above analysis as can be known, the present invention is under any operating mode, though all destroyeds of the sealing of two safety check, the danger of the polluted source that also can effectively prevent to flow backwards.
Claims (8)
1. rectangular shape backflow preventer, it is characterized in that: have the backflow preventer body of forming by valve body and valve gap, be provided with inlet check valve in the described backflow preventer body, with the drainage check valve in the same axle center of inlet check valve, with inlet check valve, the vertically arranged outlet non-return valve of drainage check valve.
2. rectangular shape backflow preventer according to claim 1 is characterized in that: be provided with diaphragm between described valve body and the valve gap, be connected with top board above the described diaphragm, be connected with press table below; The centre of described diaphragm, top board, press table is provided with manhole.
3. rectangular shape backflow preventer according to claim 2 is characterized in that: described top board upper-end surface is provided with the annular sword limit that raises up along endoporus.
4. rectangular shape backflow preventer according to claim 2 is characterized in that: be provided with boss in the middle of the lower end surface of described press table, it respectively forms a spring seat on inside and outside footpath, between spring seat on the described press table external diameter and the valve body spring one is housed.
5. according to claim 1 or 2 or 3 or 4 described rectangular shape backflow preventers, it is characterized in that: the lower end mouth of valve body is provided with the annular sword limit that raises up, and described annular sword has sealing gasket two on the limit, and baffle plate two is arranged above the sealing gasket two; Described sealing gasket two, baffle plate two are connected on the valve rod, and two ends of valve rod have guide plate, and spring two is installed between baffle plate two and the press table; Drainage check valve is formed on described valve rod, guide plate, sealing gasket two, baffle plate two, spring one, spring two and valve body lower end choma shape sword limit.
6. according to claim 1 or 2 or 3 or 4 described rectangular shape backflow preventers, it is characterized in that: inlet check valve is made up of guide plate, valve rod, baffle plate one, sealing gasket one, top board annular sword limit, upper end and spring two; On the annular sword limit of top board the sealing gasket one that is connected on the valve rod is installed, baffle plate one is arranged on the sealing gasket one, two ends of described valve rod have guide plate.
7. rectangular shape backflow preventer according to claim 5 is characterized in that: inlet check valve is made up of guide plate, valve rod, baffle plate one, sealing gasket one, top board annular sword limit, upper end and spring two; On the annular sword limit of top board the sealing gasket one that is connected on the valve rod is installed, baffle plate one is arranged on the sealing gasket one, two ends of described valve rod have guide plate.
8. according to claim 1 or 2 or 3 or 4 described rectangular shape backflow preventers, it is characterized in that: outlet non-return valve is by guide sleeve, guide rod, spring three, and the annular sword limit of sealing gasket three and valve body side is formed; Side of valve body is provided with the annular sword limit of projection forward, and there is sealing gasket three front, annular sword limit, and sealing gasket three is installed on the guide rod, states guide rod and is connected in the guide sleeve, between guide sleeve and sealing gasket three spring three is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010236950 CN101936412B (en) | 2010-07-26 | 2010-07-26 | Right-angle backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010236950 CN101936412B (en) | 2010-07-26 | 2010-07-26 | Right-angle backflow preventer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101936412A true CN101936412A (en) | 2011-01-05 |
| CN101936412B CN101936412B (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010236950 Active CN101936412B (en) | 2010-07-26 | 2010-07-26 | Right-angle backflow preventer |
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| CN (1) | CN101936412B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821969A (en) * | 2014-01-28 | 2014-05-28 | 何际跃 | Follow-up backflow preventer |
| CN105202236A (en) * | 2015-09-30 | 2015-12-30 | 沈阳工业大学通益科技有限公司 | High-temperature electric submersible pump safety valve |
| CN105370924A (en) * | 2015-10-28 | 2016-03-02 | 杭州春江阀门有限公司 | Side valve type decompression backflow preventer |
| CN105909833A (en) * | 2016-06-27 | 2016-08-31 | 天津市国威给排水设备制造有限公司 | Air supplementing device of backflow preventer |
| CN108487386A (en) * | 2018-03-20 | 2018-09-04 | 浙江三泉智能科技有限公司 | Air is every dirty device and intelligent closestool |
| WO2019119414A1 (en) | 2017-12-22 | 2019-06-27 | Fresenius Medical Care Deutschland Gmbh | Backflow Prevention Device and Dialysis Apparatus with the Backflow Prevention Device |
| CN111267813A (en) * | 2020-01-19 | 2020-06-12 | 中车青岛四方机车车辆股份有限公司 | Drain valve, rail vehicle with drain valve and control method of drain system |
| CN112412722A (en) * | 2020-11-05 | 2021-02-26 | 太原理工大学 | High-speed active lubrication radial static balance plunger pump for high-water-based medium |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4013089A (en) * | 1975-09-17 | 1977-03-22 | Braukmann Armaturen Ag | Back flow preventer valve |
| US4117856A (en) * | 1976-09-27 | 1978-10-03 | Mark Controls Corporation | Frostproof backflow preventer |
| CN2381857Y (en) * | 1999-08-17 | 2000-06-07 | 北京融洋技术研究所 | Liquid backflow preventor |
| CN201288864Y (en) * | 2008-10-29 | 2009-08-12 | 张明亮 | Welding stainless steel backflow preventer |
| CN201507001U (en) * | 2009-09-24 | 2010-06-16 | 宁波埃美柯铜阀门有限公司 | Safe sanitary antifouling block valve |
| CN101749460A (en) * | 2008-12-10 | 2010-06-23 | 刘永 | Dual-membrane micro-resistant ultrashort backflow preventer |
| CN201739574U (en) * | 2010-07-26 | 2011-02-09 | 杭州春江阀门有限公司 | Right angle type backflow preventing device |
-
2010
- 2010-07-26 CN CN 201010236950 patent/CN101936412B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4013089A (en) * | 1975-09-17 | 1977-03-22 | Braukmann Armaturen Ag | Back flow preventer valve |
| US4117856A (en) * | 1976-09-27 | 1978-10-03 | Mark Controls Corporation | Frostproof backflow preventer |
| CN2381857Y (en) * | 1999-08-17 | 2000-06-07 | 北京融洋技术研究所 | Liquid backflow preventor |
| 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 |
| CN201507001U (en) * | 2009-09-24 | 2010-06-16 | 宁波埃美柯铜阀门有限公司 | Safe sanitary antifouling block valve |
| CN201739574U (en) * | 2010-07-26 | 2011-02-09 | 杭州春江阀门有限公司 | Right angle type backflow preventing device |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821969A (en) * | 2014-01-28 | 2014-05-28 | 何际跃 | Follow-up backflow preventer |
| CN105202236A (en) * | 2015-09-30 | 2015-12-30 | 沈阳工业大学通益科技有限公司 | High-temperature electric submersible pump safety valve |
| CN105202236B (en) * | 2015-09-30 | 2018-04-24 | 中国石油辽河油田曙光采油厂 | High-temperature submersible electric pump safety valve |
| CN105370924A (en) * | 2015-10-28 | 2016-03-02 | 杭州春江阀门有限公司 | Side valve type decompression backflow preventer |
| CN105370924B (en) * | 2015-10-28 | 2017-08-01 | 杭州春江阀门有限公司 | Side valve type pressure reduction type backflow preventer |
| CN105909833A (en) * | 2016-06-27 | 2016-08-31 | 天津市国威给排水设备制造有限公司 | Air supplementing device of backflow preventer |
| EP3728912A4 (en) * | 2017-12-22 | 2021-09-01 | Fresenius Medical Care Deutschland GmbH | Backflow prevention device and dialysis apparatus with the backflow prevention device |
| WO2019119414A1 (en) | 2017-12-22 | 2019-06-27 | Fresenius Medical Care Deutschland Gmbh | Backflow Prevention Device and Dialysis Apparatus with the Backflow Prevention Device |
| US11273242B2 (en) | 2017-12-22 | 2022-03-15 | Fresenius Medical Care Deutschland Gmbh | Backflow prevention device and dialysis apparatus with the backflow prevention device |
| CN108487386A (en) * | 2018-03-20 | 2018-09-04 | 浙江三泉智能科技有限公司 | Air is every dirty device and intelligent closestool |
| CN108487386B (en) * | 2018-03-20 | 2024-03-22 | 山东联大凯威实业发展有限公司 | Air dirt isolation device and intelligent closestool |
| CN111267813B (en) * | 2020-01-19 | 2021-03-09 | 中车青岛四方机车车辆股份有限公司 | Drain valve, rail vehicle with drain valve and control method of drain system |
| CN111267813A (en) * | 2020-01-19 | 2020-06-12 | 中车青岛四方机车车辆股份有限公司 | Drain valve, rail vehicle with drain valve and control method of drain system |
| CN112412722A (en) * | 2020-11-05 | 2021-02-26 | 太原理工大学 | High-speed active lubrication radial static balance plunger pump for high-water-based medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101936412B (en) | 2012-10-10 |
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