EP0084754B1 - Rückflussverhinderer für Druckleitungen - Google Patents
Rückflussverhinderer für Druckleitungen Download PDFInfo
- Publication number
- EP0084754B1 EP0084754B1 EP82420018A EP82420018A EP0084754B1 EP 0084754 B1 EP0084754 B1 EP 0084754B1 EP 82420018 A EP82420018 A EP 82420018A EP 82420018 A EP82420018 A EP 82420018A EP 0084754 B1 EP0084754 B1 EP 0084754B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow
- seat
- valve
- disconnecting apparatus
- discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000007788 liquid Substances 0.000 claims description 29
- 244000273618 Sphenoclea zeylanica Species 0.000 claims 1
- 230000005484 gravity Effects 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 239000012528 membrane Substances 0.000 abstract description 34
- 238000011144 upstream manufacturing Methods 0.000 description 29
- 239000012530 fluid Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000011109 contamination Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RJFAYQIBOAGBLC-UHFFFAOYSA-N Selenomethionine Natural products C[Se]CCC(N)C(O)=O RJFAYQIBOAGBLC-UHFFFAOYSA-N 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000021183 entrée Nutrition 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/02—Plumbing installations for fresh water
- E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
- E03C1/106—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using two or more check valves
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/02—Plumbing installations for fresh water
- E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
- E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2544—Supply and exhaust type
- Y10T137/2557—Waste responsive to flow stoppage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/3149—Back flow prevention by vacuum breaking [e.g., anti-siphon devices]
- Y10T137/3185—Air vent in liquid flow line
- Y10T137/3294—Valved
- Y10T137/3331—With co-acting valve in liquid flow path
Definitions
- the present invention relates to a backflow preventer, intended to equip hydraulic pipes, the pollution of which is to be avoided.
- the liquid circulating in these pipes can be of all kinds. It can be water, and in particular drinking water or various liquids used in the chemical industry.
- Backflow preventers operating according to this principle are known.
- the backflow preventer protects the upstream circuit and discharges the liquid from the downstream circuit to the outside. This is used for example in the chemical industry for highly polluting waters: polluted water is forbidden to go up towards the source of clean water, even if an ordinary valve, become defective, ceases to be waterproof.
- polluted water is forbidden to go up towards the source of clean water, even if an ordinary valve, become defective, ceases to be waterproof.
- the interior space of the backflow preventer defines a dead zone, it must be guaranteed that the water considered as polluted contained in this dead zone does not risk being sucked back towards the upstream circuit, that is to say towards the clean circuit:
- the present invention aims to avoid these drawbacks by providing a backflow preventer in which any operational incident gives rise to a visible leak from the outside without however allowing any rebreathing of the polluted downstream liquid.
- the invention aims to make a backflow preventer of simple construction, using only common type valves and membranes.
- a hydraulic backflow preventer according to the invention is defined in claim 1.
- the vertical rod of the discharge valve is hollow, its lower end being permanently open to the outside, while its upper end is capable of being closed off on an integral intermediate seat from the body.
- a spring bearing on this intermediate seat and under a lower cup fixed to the membrane tends to simultaneously separate the relief valve and the upper end of the hollow rod from their respective seats.
- the lower part of the intermediate cavity is formed of inclined vanes so as to cause a vortex to appear within the liquid which increases the rate of emptying of this intermediate zone when the discharge valve opens.
- an upper cup secured to the membrane and the lower cup is capable of cooperating with a fixed seat in the upper part of the body, the central part of this seat communicating with the pressure chamber upstream.
- the backflow preventer illustrated in the drawings comprises a hollow body 1 capped with a cover 2, which closes it tightly. Between the hollow body 1 and the cover 2 are clamped the edges of a flexible waterproof membrane 3, the central part of which remains mobile.
- the hollow body 1 is provided with an upstream connection tip 4 and a downstream connection tip 5.
- these two upstream 7 and downstream 11 valves are oriented in the same direction, that is to say that they both tend to open under the pressure of a fluid pressure when the liquid normally flows from the upstream nozzle 4 to the downstream nozzle 5, as shown diagrammatically in FIG. 2 by arrows 15 and 16.
- the intermediate chamber 6 defined between the seats 8 and 12 of the two aforementioned valves also opens outwards thanks to a fixed seat 17 located at its lower part.
- This fixed discharge seat 17 cooperates with a discharge valve 18 capable of coming seal it tightly.
- the shutter 18 is located at the lower part of a vertical movable rod 19, the upper part of which is connected to the central part of the membrane 3, by means which will now be described.
- the vertical rod 19 of the discharge shutter is hollow: an axial bore 20 traverses it over its entire length so as to be permanently in communication with the external atmosphere, by its lower end passing through the center of the seat 17.
- the upper end of this rod forming a shutter 21 is capable of coming to cooperate with a seat 22 in the lower part of a chamber in communication with the axial bore 20.
- the hollow rod is provided with radial arms 23 passing through the intermediate seat in order to be fixed on the lower cup 24 so as to secure the action of the membrane with the relief valve 18 and the shutter 21 of air intake.
- the lower part of the intermediate cavity is formed of inclined blades 25 so as to make appear within the liquid a vortex or vortex increasing the rate of emptying of the liquid in this zone when the discharge valve 17-18 is open.
- a compression spring 26 On the upper face of the intermediate seat is supported a compression spring 26, the top of which bears under the lower cup 24. The action of this spring tends to lift the relief valve 18 above its seat, on the other hand to raise the shutter 21 above its seat 22.
- an upper cup is fixed by a central hole to the membrane on the lower cup.
- the membrane 3 is thus clamped and shouldered between the cups 24 and 27.
- the upper cup is provided with an annular seal 28 capable of cooperating with a seat 29 located on the central part of the cover 2.
- a pressure chamber 30 is thus defined inside the cover above the upper cup 27 on its seat 28. This pressure chamber communicates directly with the upstream connection nozzle 4, by a channel 31 which opens upstream of the valve 7.
- a second chamber 32 is also defined, still inside the cover 2, between the shutter 28 and the membrane 3.
- the backflow preventer When the backflow preventer is connected between an upstream circuit connected to the nozzle 4 and a downstream circuit connected to the nozzle 5, it retains the rest position illustrated in FIG. 1 if the upstream pressure in the nozzle 4 and in the chamber 30 is insufficient to cause the closure of the shutter of the relief valves 17, 18, 21, 22.
- downstream circuit tends to push back (arrow 35) while the membrane 3 is punctured. Upstream fluid therefore tends to penetrate through the membrane 3 into the chamber 6 to flow outward through the seat 17 and attract the attention of users. If the downstream valve 11 is sealed, nothing else happens. If on the contrary, the valve 11 is also deteriorated, the downstream liquid discharging into the chamber 6 also flows through the seat of the relief valve 17, 18, the seal 28 being on its seat 29, increasing the flow rate of the leak visible from the outside, but without risking contaminating the clean liquid in the upstream circuit 4.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Safety Valves (AREA)
- Check Valves (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Fluid-Driven Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Claims (11)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP82420018A EP0084754B2 (de) | 1982-01-26 | 1982-01-26 | Rückflussverhinderer für Druckleitungen |
AT82420018T ATE15822T1 (de) | 1982-01-26 | 1982-01-26 | Rueckflussverhinderer fuer druckleitungen. |
DE8282420018T DE3266453D1 (en) | 1982-01-26 | 1982-01-26 | Back flow preventer for hydraulic conduits |
US06/349,748 US4478236A (en) | 1982-01-26 | 1982-02-18 | Disconnector for hydraulic circuits |
CA000398392A CA1210665A (fr) | 1982-01-26 | 1982-03-15 | Disjoncteur a vidage automatique pour de canalisations hydrauliques |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP82420018A EP0084754B2 (de) | 1982-01-26 | 1982-01-26 | Rückflussverhinderer für Druckleitungen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0084754A1 EP0084754A1 (de) | 1983-08-03 |
EP0084754B1 true EP0084754B1 (de) | 1985-09-25 |
EP0084754B2 EP0084754B2 (de) | 1991-12-11 |
Family
ID=8189963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82420018A Expired - Lifetime EP0084754B2 (de) | 1982-01-26 | 1982-01-26 | Rückflussverhinderer für Druckleitungen |
Country Status (5)
Country | Link |
---|---|
US (1) | US4478236A (de) |
EP (1) | EP0084754B2 (de) |
AT (1) | ATE15822T1 (de) |
CA (1) | CA1210665A (de) |
DE (1) | DE3266453D1 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2544832A1 (fr) * | 1983-04-22 | 1984-10-26 | Bayard Sa Ets | Dispositif anti-retour pour reseau d'alimentation en eau |
FR2561346A1 (fr) * | 1984-03-14 | 1985-09-20 | Bayard Ets | Appareil anti-retour pour reseaux d'alimentation en eau |
AU582923B2 (en) * | 1985-10-21 | 1989-04-13 | Zvi Weingarten | Backflow preventer apparatus for fluid flow lines |
WO1989010509A1 (en) * | 1988-04-22 | 1989-11-02 | Burnetta Pty. Ltd. | Backflow prevention valve |
WO1991006716A1 (de) * | 1989-11-07 | 1991-05-16 | Waletzko Armaturen Gmbh | Rückflussverhinderer, insbesondere zum einbau in trinkwasserleitungen |
EP0573980A1 (de) * | 1992-06-12 | 1993-12-15 | BRANDONI S.p.A. | Dreiwege-Absperrventil insbesondere für sanitäre Verteilungssysteme |
EP0671514A2 (de) * | 1993-11-02 | 1995-09-13 | Kurt Michael Dipl.-Ing. Desch | Kombinierte Badewannen- Ein- und Überlauf-Armatur mit Dusch-Umschaltung und integriertem Systemtrenngerät (BA) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4733919A (en) * | 1987-03-10 | 1988-03-29 | Hwp Group, Inc. | Integrated pressure exhaust valve and fluid coupling |
FR2634268B1 (fr) * | 1988-07-15 | 1990-11-16 | Socla | Vanne, organe de commande pour fluide et appareil de protection contre les retours de fluide la comportant |
US4984306A (en) * | 1989-04-17 | 1991-01-15 | Sumerix Carl L | Chemical injector assembly |
US5103856A (en) * | 1991-02-11 | 1992-04-14 | Kohler Co. | Anti-siphoning valve assembly |
DE4204386C2 (de) * | 1992-02-14 | 1994-01-20 | Honeywell Braukmann Gmbh | Systemtrenner |
US5279324A (en) * | 1992-11-20 | 1994-01-18 | Kwc Ag | Anti-siphoning valve assembly and plumbing fixture including same |
DE4409104B4 (de) * | 1993-03-20 | 2004-10-28 | Desch, Kurt Michael, Dipl.-Ing. (FH) | Hydraulisches Drei-Kammer-Systemtrenngerät |
DE4309085C1 (de) * | 1993-03-20 | 1995-01-05 | Schubert & Salzer Ag | Systemtrenner |
US6325090B1 (en) | 1998-06-09 | 2001-12-04 | Watts Investment Company | Backflow preventer assembly |
US6021805A (en) * | 1998-06-09 | 2000-02-08 | Watts Investment Company | Backflow preventer assembly |
EP1239201A1 (de) * | 2001-03-08 | 2002-09-11 | Bestobell Valves | Ventilsystem |
DE10335380B3 (de) * | 2003-07-28 | 2004-11-25 | Alfred Kärcher Gmbh & Co. Kg | Rückflußverhinderer |
IL163133A (en) * | 2004-07-21 | 2008-06-05 | A R I Flow Control Accessories | Prevents backflow |
DE102004044832B3 (de) * | 2004-09-14 | 2006-01-19 | Alfred Kärcher Gmbh & Co. Kg | Rückflussverhinderer |
US20080185549A1 (en) * | 2007-02-02 | 2008-08-07 | Steinbuchel Herman J | Differential valve |
GB2453126B (en) | 2007-09-26 | 2013-02-06 | Intelligent Energy Ltd | Fuel cell system |
GB2453127A (en) | 2007-09-26 | 2009-04-01 | Intelligent Energy Ltd | Fuel Cell System |
JP5189399B2 (ja) * | 2008-04-07 | 2013-04-24 | 国立大学法人信州大学 | 逆止弁 |
JP5189403B2 (ja) * | 2008-05-08 | 2013-04-24 | 国立大学法人信州大学 | 逆流防止装置 |
DE102010024786A1 (de) * | 2010-06-23 | 2011-12-29 | Honeywell Technologies S.A.R.L. | Systemtrenner |
JP6183648B2 (ja) * | 2013-07-25 | 2017-08-23 | 株式会社ノーリツ | 逆流防止装置 |
CN103511686B (zh) * | 2013-09-17 | 2016-07-06 | 天津市倒流防止器制造有限公司 | 一种倒流防止器结构 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2503424A (en) * | 1945-01-15 | 1950-04-11 | Leonard L Snyder | Backflow preventer |
US3173439A (en) * | 1961-06-26 | 1965-03-16 | Donald G Griswold | Backflow prevention device |
DE1902948C3 (de) * | 1969-01-22 | 1980-06-04 | Ortmann & Herbst, 2000 Hamburg | Füllventil fur Gegendruckflaschenfüller |
US4232704A (en) * | 1978-03-28 | 1980-11-11 | Amtrol Inc. | In line back flow preventer |
MX150564A (es) * | 1978-06-23 | 1984-05-30 | Griswold Controls | Aparato mejorado para evitar el reflujo para una instalacion entre una tuberia de abastecimiento y una tuberia de descarga |
US4231387A (en) * | 1979-01-11 | 1980-11-04 | Chas. M. Bailey Co., Inc. | Backflow preventing valve |
US4244392A (en) * | 1979-02-09 | 1981-01-13 | Griswold Controls | Backflow prevention apparatus |
-
1982
- 1982-01-26 DE DE8282420018T patent/DE3266453D1/de not_active Expired
- 1982-01-26 AT AT82420018T patent/ATE15822T1/de not_active IP Right Cessation
- 1982-01-26 EP EP82420018A patent/EP0084754B2/de not_active Expired - Lifetime
- 1982-02-18 US US06/349,748 patent/US4478236A/en not_active Expired - Lifetime
- 1982-03-15 CA CA000398392A patent/CA1210665A/fr not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2544832A1 (fr) * | 1983-04-22 | 1984-10-26 | Bayard Sa Ets | Dispositif anti-retour pour reseau d'alimentation en eau |
FR2561346A1 (fr) * | 1984-03-14 | 1985-09-20 | Bayard Ets | Appareil anti-retour pour reseaux d'alimentation en eau |
AU582923B2 (en) * | 1985-10-21 | 1989-04-13 | Zvi Weingarten | Backflow preventer apparatus for fluid flow lines |
WO1989010509A1 (en) * | 1988-04-22 | 1989-11-02 | Burnetta Pty. Ltd. | Backflow prevention valve |
WO1991006716A1 (de) * | 1989-11-07 | 1991-05-16 | Waletzko Armaturen Gmbh | Rückflussverhinderer, insbesondere zum einbau in trinkwasserleitungen |
EP0573980A1 (de) * | 1992-06-12 | 1993-12-15 | BRANDONI S.p.A. | Dreiwege-Absperrventil insbesondere für sanitäre Verteilungssysteme |
EP0671514A2 (de) * | 1993-11-02 | 1995-09-13 | Kurt Michael Dipl.-Ing. Desch | Kombinierte Badewannen- Ein- und Überlauf-Armatur mit Dusch-Umschaltung und integriertem Systemtrenngerät (BA) |
Also Published As
Publication number | Publication date |
---|---|
DE3266453D1 (en) | 1985-10-31 |
US4478236A (en) | 1984-10-23 |
EP0084754A1 (de) | 1983-08-03 |
CA1210665A (fr) | 1986-09-02 |
EP0084754B2 (de) | 1991-12-11 |
ATE15822T1 (de) | 1985-10-15 |
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