EP0084754A1 - Rückflussverhinderer für Druckleitungen - Google Patents

Rückflussverhinderer für Druckleitungen Download PDF

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Publication number
EP0084754A1
EP0084754A1 EP82420018A EP82420018A EP0084754A1 EP 0084754 A1 EP0084754 A1 EP 0084754A1 EP 82420018 A EP82420018 A EP 82420018A EP 82420018 A EP82420018 A EP 82420018A EP 0084754 A1 EP0084754 A1 EP 0084754A1
Authority
EP
European Patent Office
Prior art keywords
upstream
seat
valve
downstream
backflow preventer
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.)
Granted
Application number
EP82420018A
Other languages
English (en)
French (fr)
Other versions
EP0084754B1 (de
EP0084754B2 (de
Inventor
Jean François Comeau
Bernard Neuzeret
Jean Richard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Socla SAS
Original Assignee
Socla SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8189963&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0084754(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Socla SAS filed Critical Socla SAS
Priority to EP82420018A priority Critical patent/EP0084754B2/de
Priority to DE8282420018T priority patent/DE3266453D1/de
Priority to AT82420018T priority patent/ATE15822T1/de
Priority to US06/349,748 priority patent/US4478236A/en
Priority to CA000398392A priority patent/CA1210665A/fr
Publication of EP0084754A1 publication Critical patent/EP0084754A1/de
Publication of EP0084754B1 publication Critical patent/EP0084754B1/de
Publication of EP0084754B2 publication Critical patent/EP0084754B2/de
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 prohibited from going up to the source of clean water, even if an ordinary valve, which has become defective, ceases to be waterproof.
  • polluted water is prohibited from going up to the source of clean water, even if an ordinary valve, which has 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 object of the present invention is 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 re-aspiration of the polluted downstream liquid.
  • the invention aims to produce a backflow preventer of simple construction, using only type valves and membranes. current.
  • a hydraulic backflow preventer comprises a hollow body provided with an upstream connection end piece and a downstream connection end piece equipped respectively with an automatic valve with upstream spring and an automatic valve with downstream spring, while between the seats of these two valves are defined by an intermediate chamber at the lower part of which is a fixed seat for a discharge opening which opens towards the outside, this seat cooperating with a discharge valve situated at the part bottom of a vertical movable rod, the upper part of which is connected to a membrane surmounted by a pressure chamber which communicates directly with the upstream connection nozzle.
  • the vertical rod of the relief valve is hollow, its lower end being permanently open to the outside, while its upper end is capable of being closed off on an intermediate seat secured to the body .
  • a spring bearing on this intermediate seat and under a lower cup fixed to the membrane tends to move the relief valve and the upper end of the hollow rod away from their respective seats simultaneously.
  • the lower part of the intermediate cavity is formed of inclined blades 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 s' open.
  • 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 upstream pressure chamber.
  • 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 nozzle 4 and a downstream connection nozzle 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 the 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 shutter 18 capable of sealing it.
  • 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 cause a liquid vortex or vortex to appear within the liquid, increasing the rate of emptying of the liquid in this zone when the relief 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 located thus defined in inside of 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 in order to steal towards the exterior through the seat 17 and attract the attention of the users. If the downstream valve 11 is sealed, nothing else occurs. 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 of the upstream circuit 4.
EP82420018A 1982-01-26 1982-01-26 Rückflussverhinderer für Druckleitungen Expired - Lifetime EP0084754B2 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP82420018A EP0084754B2 (de) 1982-01-26 1982-01-26 Rückflussverhinderer für Druckleitungen
DE8282420018T DE3266453D1 (en) 1982-01-26 1982-01-26 Back flow preventer for hydraulic conduits
AT82420018T ATE15822T1 (de) 1982-01-26 1982-01-26 Rueckflussverhinderer fuer druckleitungen.
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 true EP0084754A1 (de) 1983-08-03
EP0084754B1 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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4309085C1 (de) * 1993-03-20 1995-01-05 Schubert & Salzer Ag Systemtrenner
EP0671514A3 (de) * 1993-11-02 1996-03-06 Desch Kurt Michael Kombinierte Badewannen- Ein- und Überlauf-Armatur mit Dusch-Umschaltung und integriertem Systemtrenngerät (BA).
DE4409104B4 (de) * 1993-03-20 2004-10-28 Desch, Kurt Michael, Dipl.-Ing. (FH) Hydraulisches Drei-Kammer-Systemtrenngerät
CN103511686A (zh) * 2013-09-17 2014-01-15 天津市倒流防止器制造有限公司 一种倒流防止器结构
EP2400067A3 (de) * 2010-06-23 2015-08-26 Honeywell Technologies Sarl Systemtrenner

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2544832B1 (fr) * 1983-04-22 1986-05-09 Bayard Sa Ets Dispositif anti-retour pour reseau d'alimentation en eau
FR2561346B1 (fr) * 1984-03-14 1986-09-19 Bayard Ets Appareil anti-retour pour reseaux d'alimentation en eau
US4658852A (en) * 1985-10-21 1987-04-21 Zvi Weingarten Backflow preventer apparatus for fluid flow lines
US4733919A (en) * 1987-03-10 1988-03-29 Hwp Group, Inc. Integrated pressure exhaust valve and fluid coupling
JPH02504300A (ja) * 1988-04-22 1990-12-06 バーネッタ　プロプライエタリー　リミテッド 逆流防止弁
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
DE3936962A1 (de) * 1989-11-07 1991-05-08 Waletzko Armaturen Gmbh Rueckflussverhinderer, insbesondere zum einbau in trinkwasserleitungen
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
IT1258989B (it) * 1992-06-12 1996-03-11 Disconnettore a tre vie particolarmente per impianti di distribuzione di acqua sanitaria
US5279324A (en) * 1992-11-20 1994-01-18 Kwc Ag Anti-siphoning valve assembly and plumbing fixture including same
US6021805A (en) * 1998-06-09 2000-02-08 Watts Investment Company Backflow preventer assembly
US6325090B1 (en) 1998-06-09 2001-12-04 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
JP6183648B2 (ja) * 2013-07-25 2017-08-23 株式会社ノーリツ 逆流防止装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH431407A (de) * 1961-06-26 1967-02-28 G Griswold Donald Einrichtung zur Verhinderung der Zurückströmung von verunreinigtem Wasser in Wasserversorgungsanlagen
DE2854003A1 (de) * 1978-03-28 1979-10-11 Amtrol Inc Vorrichtung zur verhinderung des rueckflusses von wasser von einer verbrauchsstelle in eine wasserversorgungsleitung
DE2925179A1 (de) * 1978-06-23 1980-01-24 Griswold Controls Vorrichtung zur verhinderung von rueckstrom
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503424A (en) * 1945-01-15 1950-04-11 Leonard L Snyder Backflow preventer
DE1902948C3 (de) * 1969-01-22 1980-06-04 Ortmann & Herbst, 2000 Hamburg Füllventil fur Gegendruckflaschenfüller

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH431407A (de) * 1961-06-26 1967-02-28 G Griswold Donald Einrichtung zur Verhinderung der Zurückströmung von verunreinigtem Wasser in Wasserversorgungsanlagen
DE2854003A1 (de) * 1978-03-28 1979-10-11 Amtrol Inc Vorrichtung zur verhinderung des rueckflusses von wasser von einer verbrauchsstelle in eine wasserversorgungsleitung
DE2925179A1 (de) * 1978-06-23 1980-01-24 Griswold Controls Vorrichtung zur verhinderung von rueckstrom
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

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4309085C1 (de) * 1993-03-20 1995-01-05 Schubert & Salzer Ag Systemtrenner
EP0634529A1 (de) * 1993-03-20 1995-01-18 SCHUBERT & SALZER INGOLSTADT-ARMATUREN GmbH Systemtrenner
DE4409104B4 (de) * 1993-03-20 2004-10-28 Desch, Kurt Michael, Dipl.-Ing. (FH) Hydraulisches Drei-Kammer-Systemtrenngerät
EP0671514A3 (de) * 1993-11-02 1996-03-06 Desch Kurt Michael Kombinierte Badewannen- Ein- und Überlauf-Armatur mit Dusch-Umschaltung und integriertem Systemtrenngerät (BA).
EP2400067A3 (de) * 2010-06-23 2015-08-26 Honeywell Technologies Sarl Systemtrenner
CN103511686A (zh) * 2013-09-17 2014-01-15 天津市倒流防止器制造有限公司 一种倒流防止器结构
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

Also Published As

Publication number Publication date
CA1210665A (fr) 1986-09-02
ATE15822T1 (de) 1985-10-15
EP0084754B1 (de) 1985-09-25
US4478236A (en) 1984-10-23
EP0084754B2 (de) 1991-12-11
DE3266453D1 (en) 1985-10-31

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