WO2004106787A1 - Separateur de systeme - Google Patents

Separateur de systeme Download PDF

Info

Publication number
WO2004106787A1
WO2004106787A1 PCT/EP2004/005843 EP2004005843W WO2004106787A1 WO 2004106787 A1 WO2004106787 A1 WO 2004106787A1 EP 2004005843 W EP2004005843 W EP 2004005843W WO 2004106787 A1 WO2004106787 A1 WO 2004106787A1
Authority
WO
WIPO (PCT)
Prior art keywords
base body
system separator
membrane
separator according
inlet
Prior art date
Application number
PCT/EP2004/005843
Other languages
German (de)
English (en)
Inventor
Stefan Müller
Willi Kumpf
Original Assignee
Delta Fluid Products Ltd.
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
Priority claimed from DE20308769U external-priority patent/DE20308769U1/de
Priority claimed from DE2003125388 external-priority patent/DE10325388A1/de
Application filed by Delta Fluid Products Ltd. filed Critical Delta Fluid Products Ltd.
Publication of WO2004106787A1 publication Critical patent/WO2004106787A1/fr

Links

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/022—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising a deformable member
    • F16K11/027—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising a deformable member the fluid flowing through a constrictable tubular diaphragm

Definitions

  • the invention relates to a system separator with a flow housing, which comprises an inlet-side backflow preventer, an outlet-side backflow preventer and a middle chamber which can be emptied via a drain valve depending on the pressure difference between the inlet side and the middle chamber.
  • a system separator is a safety valve that is installed in a drinking water pipe to prevent non-drinking water from flowing back into the drinking water pipe.
  • a fluid such as drinking water, normally flows through the system separator from the inlet side through the inlet-side backflow preventer into the middle chamber and from there through the outlet-side backflow preventer to the outlet side. If the pressure on the outlet side of the system separator increases, for example due to damage in the downstream system so that the medium is pushed back, or if the pressure on the inlet side of the system separator decreases, for example due to a pipe break, so that if suction is carried out, the flow is reversed in both cases due to a negative pressure difference.
  • the two backflow preventers close at a certain, minimal positive pressure difference of in particular 0.14 bar between the inlet side and the middle chamber.
  • the middle chamber is equipped with a drain valve to open a ventilation opening in the event of damage and also to drain the medium through an outlet opening. If the outlet check valve is leaking, If the pressure difference is negative, i.e. if the pressure on the outlet side is higher than on the inlet side of the system separator, the pressure in the middle chamber will increase. The increased pressure in the middle chamber causes the drain valve to open and open a flow path for the pressurizing medium into a relief chamber.
  • the drain valve which can also be called a relief valve, only closes when the pressure difference between the inlet side and the middle chamber is at least 0.14 bar.
  • Conventional system separators are often of complex design and are therefore expensive to manufacture.
  • the object of the invention is to provide a system separator of the type described at the outset, which is simple in construction and inexpensive to produce.
  • a system separator with a flow housing, which comprises an inlet-side backflow preventer, an outlet-side backflow preventer and a middle chamber, which can be emptied via a drain valve depending on the pressure difference between the inlet side and the middle chamber
  • the inlet-side backflow preventer comprises a backflow prevention section of a diaphragm which, depending on the inlet-side pressure, opens a flow path to the outlet-side backflow preventer
  • the discharge valve comprises a discharge section of the same membrane which, depending on the pressure difference between the inlet side and the middle chamber, has a flow path from the middle chamber releases to a drain.
  • the membrane performs both the function of the non-return valve on the inlet side and the drain valve.
  • the advantage is that the number of the required individual parts significantly reduced.
  • the membrane is preferably made of an elastic plastic, for example rubber.
  • a preferred exemplary embodiment of the system separator is characterized in that the membrane has an essentially tubular membrane base body. This shape has the advantage that the membrane can be produced simply and inexpensively, for example by injection molding.
  • the membrane is preferably formed from an elastomeric plastic.
  • Another preferred exemplary embodiment of the system separator is characterized in that a collar is formed at one end of the essentially tubular basic membrane body. The collar serves to fix and seal the membrane in the flow housing.
  • Another preferred exemplary embodiment of the system separator is characterized in that the backflow prevention section is arranged at one end of the essentially tubular membrane base body.
  • the backflow prevention section is preferably attached to the end of the basic membrane body opposite the collar.
  • Another preferred embodiment of the system separator is characterized in that the drain section, viewed in the axial direction, between the backflow prevention section and the opposite end of the substantially tubular membrane base body is arranged. In conjunction with other features, this is intended to ensure that the discharge section closes the flow path from the middle chamber to the drain before the inlet-side backflow prevention section clears the flow path to the outlet-side backflow preventer.
  • the essentially tubular membrane base body interacts with a support body which is arranged in the flow-through housing.
  • the support body carries the membrane and can be made of plastic.
  • the support body is preferably produced by injection molding.
  • the basic membrane body is partially sealing against the support body.
  • a further preferred exemplary embodiment of the system separator is characterized in that the support body has an essentially sleeve-shaped support base body which is open at its input end and closed in the region of its output end.
  • the medium can enter the support base body through the open end of the support base body.
  • the closed end of the support body prevents the medium from passing through the support body in the axial direction.
  • a further preferred exemplary embodiment of the system separator is characterized in that at least one radial opening is cut out in the essentially sleeve-shaped support base body, which connects the input side of the system separator with the inner circumferential surface of the essentially tubular membrane basic body connects.
  • the pressure prevailing on the inlet side can be applied to the membrane through the radial opening. If the pressure exceeds a predetermined value, the membrane lifts off the supporting base body, to which it otherwise, at least partially, bears in a sealing manner.
  • Another preferred exemplary embodiment of the system separator is characterized in that a collar is formed at one end of the essentially sleeve-shaped support base body. The collar serves to fix the support body and the membrane in the flow housing.
  • a further preferred exemplary embodiment of the system separator is characterized in that the essentially tubular membrane base body is dimensioned and designed such that the backflow prevention section bears against the support base body, in particular at one end of the support base body, when the pressure on the inlet side falls below a predetermined value in order to interrupt the flow path to the outlet-side backflow preventer, and is dimensioned and designed such that the backflow prevention section lifts off the support base body, in particular from the end of the support base body, in order to release the flow path between the inlet side and the outlet-side backflow preventer input pressure exceeds a predetermined value. This ensures the function of the non-return valve on the input side in a simple manner.
  • Another preferred exemplary embodiment of the system separator is characterized in that the essentially tubular membrane base body is dimensioned and designed such that the discharge section bears against the flow housing when the pressure difference between the inlet side and the middle chamber has a predetermined value of in particular 0.14 bar exceeds, and thereby closes a flow path from the central chamber between the support base body and the flow-through housing to a relief space. If the pressure difference between the inlet side and the middle chamber falls below the predetermined value, the membrane detaches from the flow housing and can come into contact with the supporting base body in order to open the flow path to the drain or relief space.
  • Another preferred exemplary embodiment of the system separator is characterized in that a filter element is arranged in the essentially sleeve-shaped support base body.
  • the filter element serves to filter the medium flowing into the system separator.
  • Figure 1 shows a system separator in longitudinal section in a first state in which the inlet-side backflow preventer is closed and the drain valve is open and
  • FIG. 2 shows the system separator from FIG. 1 in a second state, in which the backflow preventer on the inlet side is open and the drain valve is closed.
  • a system separator according to the invention is shown in longitudinal section in two different switching states.
  • the system separator has an essentially tubular flow-through housing 1, which has three axial sections 2, 3 and 4 with different outside and inside diameters.
  • the first section 2 has the largest diameter and the third section 4 the smallest diameter.
  • the second section 3 is arranged between the sections 2 and 4 and has a diameter which is smaller than that of section 2 but larger than that of section 4.
  • the input side 6 of the system separator is arranged.
  • the input side 6 is connected in a known manner to a drinking water supply line.
  • the output side 8 of the system separator is arranged.
  • the output side 8 is connected in a known manner to a system to be supplied with drinking water, for example a washing machine.
  • a central chamber 9 is formed in the flow-through housing 1 between the input side 6 and the output side 8.
  • the middle chamber 9 can be connected to a discharge space (not shown) via a drain connection 10.
  • a support body 12 is arranged in the central chamber 9 and has a support body 13 which is substantially conical-cylindrical in shape.
  • the support base body 13 is open at its input end and closed by a base 14 in the region of its output end. A flow through the support base body 13 in the axial direction is prevented by the base 14.
  • a collar 15 is formed, by means of which the support body 12 can be fixed in the flow housing 1.
  • a filter element 18 is arranged in the interior of the support base body 13 and serves to filter the fluid flowing in from the inlet side, in particular drinking water.
  • a plurality of openings in the support base body 13 which run in the axial direction are recessed in the input-side half of the support base body.
  • the openings 20 are arranged distributed uniformly in the circumferential direction of the support base body 13 and allow fluid to pass through in the radial direction.
  • the basic support body 13 is surrounded by a membrane 24, which has a substantially tubular basic membrane body 25, which bears against the basic support body 13.
  • a collar 26 is formed on the input-side end of the membrane basic body 25, which collar is pressed by the collar 15 of the support body 12 against a circumferential shoulder 28 in the flow-through housing 1.
  • a sealing contour 30 is fixed on the inside in the vicinity of the discharge nozzle 10 and forms a valve seat for a discharge section 50, which is provided approximately in the middle of the diaphragm base body 25.
  • a discharge section 50 bears against the support base body 13, as shown in FIG. 1, a flow path from the middle chamber 9 to the drainage connection 10 is released.
  • a backflow prevention section 52 bears against the base body end 13 in the region of the outlet end thereof. Thereby, a flow path from the middle chamber 9 between the support base body 13 and the backflow prevention section 52 of the membrane base body 25 interrupted through the openings 20 to the input side 6.
  • the membrane base body 25 with the backflow prevention section 52 forms, together with the support base body 13 and the openings 20 formed therein, the inlet-side backflow preventer.
  • the diaphragm base body 25 with the drain section 50 forms, together with the flow housing 1, the drain valve.
  • the discharge section 50 of the membrane 24 moves away from the support base body 13 and comes to bear against the sealing contour 30, so that the flow path, as shown in FIG. 2, from the central chamber 9 to the drain port 10 is interrupted.
  • the backflow prevention section 52 also moves away from the support base body 13, as is also shown in FIG. 2, and opens a flow path from the inlet side 6 to an outlet-side backflow preventer 60.
  • the outlet-side backflow preventer 60 comprises a spring-biased closing element, the structure and function of which are assumed to be known. If the pressure in the middle chamber 9 rises only slightly, then the outlet-side backflow preventer 60 opens the connection to the outlet side 8.
  • the water flows with a pressure drop from the inlet side 6 via the middle chamber 9 to the outlet side 8 and from there via an outlet (not shown) Pipe system to the consumer. If the consumption is throttled or completely shut off, then the backflow prevention section 52 comes into contact again with the support base body 13 and the outlet-side backflow preventer 60 also closes. In the event of a fault, for example if the outlet-side backflow preventer 60 leaks, the pressure in the central chamber 9 increases and the pressure drop between the inlet side 6 and the central chamber 9 decreases. When the pressure difference between the inlet side 6 and the middle chamber 9 is reduced, the discharge section 50 moves away from the sealing contour 30 and opens the flow path from the middle chamber 9 to the outlet connection 10.
  • the medium flowing through the backflow preventer 60 into the middle chamber 9 due to the fault can therefore flow unhindered through the drain port 10. Contamination of the drinking water on the inlet side 6 is thus ruled out, since the medium can flow out via the outlet connection 10 and at the same time a backflow of the medium to the inlet side 6 through the inlet-side backflow preventer 52 is prevented.
  • test connections 71, 72 and 73 can be used to measure the pressures on the inlet side 6, in the middle chamber 9 and on the outlet side 8 in order to check the correct functioning of the system separator shown in FIGS. 1 and 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne un séparateur de système comprenant un boîtier d'écoulement (1) qui comprend un clapet d'aspiration (12, 24) côté entrée, un clapet d'aspiration (60) côté sortie et une chambre centrale (9) qui peut être vidée par une soupape de décharge (12, 24) en fonction de la différence de pression entre le côté entrée (6) et la chambre centrale (9). Pour créer un séparateur de système de construction simple et de production économique, le clapet d'aspiration côté entrée comprend une section clapet d'aspiration (52) d'une membrane, cette section libérant une voie d'écoulement vers le clapet d'aspiration (60) côté sortie en fonction de la pression côté entrée. En outre, la soupape de décharge comprend une section de décharge (50) de la même membrane qui, en fonction de la différence de pression entre le côté entrée (6) et la chambre centrale (9), libère une voie d'écoulement de la chambre centrale (9) jusqu'à un déversoir (10).
PCT/EP2004/005843 2003-05-30 2004-05-29 Separateur de systeme WO2004106787A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE20308769U DE20308769U1 (de) 2003-05-30 2003-05-30 Systemtrenner
DE2003125388 DE10325388A1 (de) 2003-05-30 2003-05-30 Systemtrenner
DE20308769.0 2003-05-30
DE10325388.2 2003-05-30

Publications (1)

Publication Number Publication Date
WO2004106787A1 true WO2004106787A1 (fr) 2004-12-09

Family

ID=33491660

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/005843 WO2004106787A1 (fr) 2003-05-30 2004-05-29 Separateur de systeme

Country Status (1)

Country Link
WO (1) WO2004106787A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009013771U1 (de) 2009-10-02 2010-07-22 Hidde, Axel R., Dr. System- oder Rohrtrenner in Modulbauweise als Patrone

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952766A (en) * 1974-08-13 1976-04-27 Jh Industries, Inc. Backflow preventer
US5454396A (en) * 1993-08-17 1995-10-03 Kwc Ag Sanitary safety device for preventing the backflow of water

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952766A (en) * 1974-08-13 1976-04-27 Jh Industries, Inc. Backflow preventer
US5454396A (en) * 1993-08-17 1995-10-03 Kwc Ag Sanitary safety device for preventing the backflow of water

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202009013771U1 (de) 2009-10-02 2010-07-22 Hidde, Axel R., Dr. System- oder Rohrtrenner in Modulbauweise als Patrone
DE102009048093A1 (de) 2009-10-02 2011-04-07 Hidde, Axel R., Dr. System- oder Rohrtrenner in Modulbauweise als Patrone
DE102009048093B4 (de) 2009-10-02 2022-09-01 Axel R. Hidde System- oder Rohrtrenner in Modulbauweise als Patrone

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