EP2011928A2 - Ensemble anti-retour - Google Patents

Ensemble anti-retour Download PDF

Info

Publication number
EP2011928A2
EP2011928A2 EP08154137A EP08154137A EP2011928A2 EP 2011928 A2 EP2011928 A2 EP 2011928A2 EP 08154137 A EP08154137 A EP 08154137A EP 08154137 A EP08154137 A EP 08154137A EP 2011928 A2 EP2011928 A2 EP 2011928A2
Authority
EP
European Patent Office
Prior art keywords
upstream
downstream
backflow preventer
piston
valve seat
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
EP08154137A
Other languages
German (de)
English (en)
Other versions
EP2011928B1 (fr
EP2011928A3 (fr
Inventor
Willi Hecking
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.)
Hans Sasserath GmbH and Co KG
Original Assignee
Hans Sasserath GmbH and Co KG
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
Application filed by Hans Sasserath GmbH and Co KG filed Critical Hans Sasserath GmbH and Co KG
Publication of EP2011928A2 publication Critical patent/EP2011928A2/fr
Publication of EP2011928A3 publication Critical patent/EP2011928A3/fr
Application granted granted Critical
Publication of EP2011928B1 publication Critical patent/EP2011928B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • Pipe separators or system separators serve to reliably prevent backflow of liquid from a downstream liquid system into an upstream liquid system.
  • the upstream fluid system may be a drinking water system.
  • the downstream fluid system may e.g. to be a heating system. It must be absolutely prevented that contaminated water from the heating system when refilling or refilling the heating system flows back into the drinking water system, for example, the fact that the pressure in the drinking water system collapses for some reason.
  • Backflow preventer There are so-called. Backflow preventer. These are spring-loaded valves which allow fluid flow in only one direction, namely from the upstream to the downstream system. However, such backflow preventers can become leaky. Therefore, e.g. For drinking water and heating water, a separation of the liquid systems alone by backflow preventer not allowed. There must be a physical separation of the fluid systems, so that in case of failure between the systems a connection to a drain and to the atmosphere is made.
  • System or pipe dividers include an upstream backflow preventer connected to the upstream liquid system and a downstream backflow preventer connected to the downstream system. Between the backflow preventers is disposed a pressure controlled dump valve which establishes a passage from the upstream liquid system to the downstream liquid system when there is a sufficient pressure differential between the two liquid systems so that the liquid can safely flow only from the upstream to the downstream liquid system. If this pressure drop does not exist, the drain valve establishes a connection of the space between the backflow preventers with the atmosphere and a drain.
  • the drain valve is a displaceable in a valve body piston.
  • This piston has a central passage and at its downstream end face an annular valve seat, which comes to a valve-tight ring seal axially to the plant.
  • the passage then establishes an atmosphere-closed connection between the upstream and downstream fluid systems.
  • the upstream backflow preventer sits in the passageway.
  • the pressure difference between the inlet pressure in the upstream fluid system and a mean pressure acting in a medium pressure space between the piston and the downstream non-return valve acts on the piston against an opening-acting spring. For a flow to the downstream system can take place, even this pressure difference must exceed a predetermined, determined by the spring force measure.
  • the drain valve body is arranged coaxially with the non-return valve.
  • the inlet pressure in the drinking water system initially forces the piston of the discharge valve against the action of the spring acting on it into its operating position in which it connects to the drinking water system Atmosphere and interrupts the process and establishes a connection between drinking water system and heating system. Then, the upstream and downstream backflow preventers are pressed. It streams drinking water to the heating system and fill it up or down.
  • the heating system is then filled to an outlet pressure that is below the inlet pressure.
  • the difference between inlet pressure and outlet pressure is determined by the pressure drop across the backflow preventers, that is, by the strength of the return valve springs.
  • the medium pressure is appropriate the pressure drop across the upstream backflow preventer and the pressure drop across the upstream backflow preventer therebetween.
  • the pressure difference between the inlet pressure and the mean pressure must be greater than a limit determined by the loading spring of the valve body of the drain valve.
  • the known pipe cutters consist predominantly of metallic components, e.g. made of brass or copper.
  • the drain valve is thus arranged perpendicular to the flow direction between the backflow preventer. Accordingly, the housing with smaller dimensions, in particular with a smaller overall length and smaller diameter can be performed. This is associated with a considerable saving of material which reduces the manufacturing costs.
  • the housing has two coaxial connecting pieces for installation in a pipeline and a nozzle perpendicular to the axis of the connecting piece, in which an insert part is inserted with the seat seal of the drain valve.
  • the components are easily accessible eg for maintenance or replacement.
  • the insert may have a drain funnel. It may further comprise a guide member for guiding the movable valve seat.
  • the insert part is made of plastic.
  • the insert is not just a funnel, but also forms part of the drain valve. With the use of an integrated plastic part significantly less metallic material is required. As a result, the valve can be made more economical.
  • the valve seat has a smaller diameter than the piston.
  • the input pressure acting on the piston thus generates a larger force in the closing direction of the drain valve than would be the case with the valve seat due to the larger diameter.
  • the sealing force of the drain valve is correspondingly better.
  • piston and the valve seat may be formed as an integrated plastic element.
  • the upstream backflow preventer is constituted by a backflow preventer cartridge inserted in a male member, the male member being provided with outer ribs whose interspace provides communication between the communicating passage and the inlet.
  • the insertion part can also be made of plastic.
  • Fig.1 is a generally designated 10 fitting in the form of a pipe separator arrangement shown.
  • the pipe separator assembly 10 includes a housing 12 having an inlet formed as an inlet port 14 and a coaxially arranged outlet 16 as an outlet.
  • the pipe separator arrangement 10 is installed in a pipeline (not shown), for example, between a drinking water supply arranged on the inlet side in front of a heating system (not shown) arranged on the outlet side. The water thus flows from the drinking water supply through the inlet into the fitting and from there out of the outlet.
  • an upstream 18 and a downstream backflow preventer 20 are provided between inlet and outlet.
  • the backflow preventers 18 and 20 open in the direction of the outlet.
  • the backflow preventer 18 and 20 sit in a rinse tank 22 of known design and therefore need not be further described here.
  • the downstream non-return valve 20 is inserted coaxially with the outlet 16 directly with a seal 24 in a housing bore 26.
  • a respective test port 32 and 34 closed with a plug 28 or 30 is provided above the backflow preventer 18 and 20, a respective test port 32 and 34 closed with a plug 28 or 30 is provided above the backflow preventer 18 and 20, a respective test port 32 and 34 closed with a plug 28 or 30 is provided above the backflow preventer 18 and 20, a respective test port 32 and 34 closed with a plug 28 or 30 is provided.
  • the test port 32 is connected to the inlet.
  • the test port 34 is connected to the outlet. In this way, e.g. be determined by means of a pressure gauge of the input and output pressure.
  • the upstream backflow preventer 18 is seated in an insertion part 36.
  • the insertion part is in Figure 6 shown separately.
  • the insertion part is cylindrical and has ribs 38 on the lateral surface.
  • the intermediate spaces 40 formed between the ribs 38 allow a flow of water between the inlet and the test port in the form of the channel 32.
  • At the end faces of the insertion part 36 is open.
  • the use of the insertion part makes it possible to further center the test port for checking the input pressure, whereby the arrangement is particularly compact.
  • the housing 12 has a further housing bore 40.
  • the housing bore 40 is perpendicular to the housing bore 26. It opens into a downward in Fig.1 projecting nozzle 42.
  • a generally designated 44 insert part is screwed in the neck 42.
  • the insert 44 is in Figure 5 shown separately.
  • the screw 44 is constructed substantially cylindrical and has a thread 48 in the middle part 46. With the thread 48, the insert 44 is screwed into the socket 42 until it with a shoulder 50 at the end face of the neck 42 strikes.
  • the outlet funnel 52 is connected via webs 54 with the central part 46.
  • An upper part 56 of the insert 44 projecting into the neck 42 has a smaller diameter than the middle part 46.
  • Radially extending webs 60 connect the threaded portion 48, the outer part with a seat seal 64 receiving central portion 62.
  • the seat seal 64 (FIG. Fig.1 ) is held in place with a plate 66.
  • the plate 66 has a threaded pin which is screwed into the central part 62.
  • the webs 60 connect the middle part 46 further with a guide member 68.
  • the guide member 68 is also inserted with a seal 70 in the nozzle 42.
  • the guide member has a central bore 72.
  • a cooperating with the seat seal 64 coaxial with the longitudinal axis of the nozzle 42 movable valve seat 74 is guided.
  • the seat seal 64 and the valve seat 74 form a drain valve.
  • the valve seat 74 thus has a smaller diameter than the housing bore 40 and as the nozzle 42nd
  • valve seat 74 of the drain valve is fixedly connected via webs 78 to the downstream side of a piston 76 which is movable in the housing bore 40 perpendicular to the opening direction of the non-return valves 18 and 20.
  • the thus formed piston-seat part 80 is in FIG. 4 shown separately. It can be seen that the effective piston area 82 is greater than the seat diameter of the seat 74.
  • a spring 84 is supported on the one hand on the underside 86 of the piston 76. On the other hand, the spring is supported on the upper side 88 of the housing-fixed insert part 44. The spring 84 seeks the piston up in Fig.1 to press and so to hold the valve seat 74 connected to the piston 76 in an open position of the drain valve.
  • the housing bores 26 and 40 form in the intersecting region below the piston 76, a medium-pressure chamber.
  • the medium-pressure chamber is bounded by the piston 76 and the top 88 of the insert 44 on the one hand and on the other hand by the backflow preventers 18 and 20.
  • At low inlet pressure in inlet 14 is the in Fig.1 presented situation.
  • the backflow preventers 18 and 20 are closed.
  • the piston 76 is in an upper position.
  • the valve seat 74 is in an upper, open position. Now, when the downstream backflow preventer 20 is leaking, the water flows down into the medium pressure chamber and down through the drain valve into the atmosphere.
  • a barrier (not shown) is opened. Then there is an increased inlet pressure in the inlet 14. This situation is in Fig.2 shown.
  • the piston 76 is always acted upon by a past the upstream remindftussverhinderer 18 connecting channel 32 and a passage 90 on the test piece against the spring action of the loading spring 84 with input pressure.
  • the piston becomes like in Fig.2 shown pressed down. Then open the backflow preventer 18 and 20. Then prevails in the medium pressure chamber inlet pressure.
  • the water flows through the upstream backflow preventer 18 into the medium pressure chamber and from there through the downstream backflow preventer 20 to the outlet 16.
  • the force of the inlet pressure acting on the piston is greater than the spring force and the force acting from below on the piston the medium pressure.
  • the drain valve is thereby closed.
  • Figure 3 shows the arrangement in perspective view. It can be seen that the arrangement is particularly compact. The overall length is low compared to known arrangements. The diameters are also small. Since the insert 44 and the piston 76 are made of plastic, the material consumption for metal is low.
  • Figure 7 shows the arrangement along the section line AA in Fig.1 , Here, the test piece 100 for checking the medium pressure can be clearly seen.
  • An opposite test piece has the same function and allows the direction-independent installation of the assembly in a pipeline, for example, along a wall.

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)
  • Check Valves (AREA)
EP20080154137 2007-07-02 2008-04-07 Ensemble anti-retour Active EP2011928B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007030654A DE102007030654A1 (de) 2007-07-02 2007-07-02 Rohrtrenneranordnung

Publications (3)

Publication Number Publication Date
EP2011928A2 true EP2011928A2 (fr) 2009-01-07
EP2011928A3 EP2011928A3 (fr) 2011-04-06
EP2011928B1 EP2011928B1 (fr) 2014-02-26

Family

ID=39855330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080154137 Active EP2011928B1 (fr) 2007-07-02 2008-04-07 Ensemble anti-retour

Country Status (2)

Country Link
EP (1) EP2011928B1 (fr)
DE (1) DE102007030654A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012126287A1 (fr) * 2011-03-22 2012-09-27 Li Feiyu Dispositif de prévention d'écoulement de retour raccordé entre une installation de salle de bains et un système d'eau potable

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009001957U1 (de) 2009-03-10 2010-07-29 Hans Sasserath & Co Kg Heizungsarmatur
DE202011000549U1 (de) 2011-03-10 2012-06-11 Hans Sasserath & Co Kg Rückflussverhinderer-Patrone
DE202012101123U1 (de) 2011-05-27 2012-04-26 Hans Sasserath & Co. Kg Rohrtrenneranordnung
DE102012102701B3 (de) 2012-03-29 2013-06-20 Hans Sasserath & Co. Kg Rohrtrenneranordnung
DE202012105029U1 (de) 2012-12-21 2014-03-24 Hans Sasserath & Co. Kg Rohrtrenneranordnung
EP2644789B1 (fr) 2012-03-29 2017-08-09 Hans Sasserath GmbH & Co. KG. Ensemble modulaire d'un agencement de séparation de tuyaux
DE102012106957B4 (de) 2012-07-31 2014-12-11 Klaus Wittwer Speiseanordnung für Heizungsanlagen
DE102012025706B3 (de) * 2012-07-31 2015-03-12 Klaus Wittwer Speiseanordnung für Heizungsanlagen
DE202013104285U1 (de) 2013-09-19 2014-12-22 Hans Sasserath Gmbh & Co. Kg Systemtrenneranordnung
DE202014105292U1 (de) 2014-11-04 2016-02-05 Hans Sasserath Gmbh & Co. Kg Systemtrenneranordnung
DE202015100340U1 (de) 2015-01-26 2016-04-29 Hans Sasserath Gmbh & Co. Kg Systemtrenneranordnung
DE202017101225U1 (de) 2017-03-03 2018-06-05 Hans Sasserath Gmbh & Co. Kg Wasserarmatur mit Systemtrenner und Druckminderer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19854951C2 (de) 1998-11-27 2001-11-15 Rudolf Vollmer Systemtrenner
DE10214747A1 (de) 2002-04-03 2003-10-16 Sasserath & Co Kg H Ventilanordnung für einen Rohrtrenner
DE102005031422B3 (de) 2005-07-04 2006-12-21 Hans Sasserath & Co. Kg Systemtrenner

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4232704A (en) * 1978-03-28 1980-11-11 Amtrol Inc. In line back flow preventer
EP0189499B1 (fr) * 1985-01-30 1987-05-20 Honeywell-Braukmann GmbH Déconnecteur de tuyau
DE19819852C2 (de) * 1998-05-05 2000-09-07 Gruenbeck Josef Wasseraufb Rohrtrennvorrichtung und hydraulisch angetriebene Hebevorrichtung mit einer solchen Rohrtrennvorrichtung
DE19840315C1 (de) * 1998-09-04 1999-10-14 Preussag Ag Minimax Systemtrenner mit integrierter Signalabgabe
DE10128435A1 (de) * 2001-06-12 2002-12-19 Sasserath & Co Kg H Rohrtrenner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19854951C2 (de) 1998-11-27 2001-11-15 Rudolf Vollmer Systemtrenner
DE10214747A1 (de) 2002-04-03 2003-10-16 Sasserath & Co Kg H Ventilanordnung für einen Rohrtrenner
DE102005031422B3 (de) 2005-07-04 2006-12-21 Hans Sasserath & Co. Kg Systemtrenner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012126287A1 (fr) * 2011-03-22 2012-09-27 Li Feiyu Dispositif de prévention d'écoulement de retour raccordé entre une installation de salle de bains et un système d'eau potable

Also Published As

Publication number Publication date
EP2011928B1 (fr) 2014-02-26
DE102007030654A1 (de) 2009-01-08
EP2011928A3 (fr) 2011-04-06

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