EP1485539B1 - Ejecteur - Google Patents

Ejecteur Download PDF

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Publication number
EP1485539B1
EP1485539B1 EP03746544A EP03746544A EP1485539B1 EP 1485539 B1 EP1485539 B1 EP 1485539B1 EP 03746544 A EP03746544 A EP 03746544A EP 03746544 A EP03746544 A EP 03746544A EP 1485539 B1 EP1485539 B1 EP 1485539B1
Authority
EP
European Patent Office
Prior art keywords
air gap
eductor
return valve
water
venturi
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 - Lifetime
Application number
EP03746544A
Other languages
German (de)
English (en)
Other versions
EP1485539A1 (fr
Inventor
Barry DiverseyLever Equipment Ltd. Hague
Stephen DiverseyLever Equipment Ltd. Oliver
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.)
Diversey Inc
Original Assignee
JohnsonDiversey Inc
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 JohnsonDiversey Inc filed Critical JohnsonDiversey Inc
Priority to EP03746544A priority Critical patent/EP1485539B1/fr
Publication of EP1485539A1 publication Critical patent/EP1485539A1/fr
Application granted granted Critical
Publication of EP1485539B1 publication Critical patent/EP1485539B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/48—Mixing liquids with liquids; Emulsifying characterised by the nature of the liquids
    • B01F23/483—Mixing liquids with liquids; Emulsifying characterised by the nature of the liquids using water for diluting a liquid ingredient, obtaining a predetermined concentration or making an aqueous solution of a concentrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31243—Eductor or eductor-type venturi, i.e. the main flow being injected through the venturi with high speed in the form of a jet
    • 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
    • E03C1/04—Water-basin installations specially adapted to wash-basins or baths
    • E03C1/046—Adding soap, disinfectant, or the like in the supply line or at the water outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/24—Mixing of ingredients for cleaning compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying

Definitions

  • This invention relates to eductors, for mixing liquids, and non-return valves for use with these eductors. This invention also relates to methods of adapting air gap eductors.
  • Proportioning dispensing apparatus have been designed to achieve the desired dilution of the concentrated solution and dispense the mixed diluted solution.
  • venturi-type devices known as eductors
  • An eductor is normally arranged in an upright configuration and comprises a nozzle, for forming and directing a water jet downwards, an air gap below the nozzle, and a venturi structure located below the air gap.
  • a water jet passes across the air gap and enters the venturi structure.
  • the venturi structure comprises an inlet, a side passage for delivering a concentrated liquid and a chamber where the concentrated liquid is entrained by the flow of water.
  • a method of flow regulation is required to control the amount of concentrated solution drawn into the water flow.
  • eductors in particular eductors having means of flow regulation are described in US-A-5522419, this known eductor comprising the features of the preamble of claim 1 and WO94/04857.
  • eductors are operated with water provided directly from the mains supply.
  • water supply systems there is the possibility of transient conditions that could create a partial vacuum inside the water lines. This may cause reverse flow of the concentrated liquids into the water supply.
  • Air gap (AA) eductors have an air gap between the nozzle and the venturi structure, as discussed above. This provides back flow protection because water cannot pass back up the air gap to the water supply. Any water passing out of the venturi inlet under back flow conditions will simply spill out of the eductor without contaminating the water supply. Air gap eductors therefore provide a relatively high level of back flow protection but have a number of disadvantage which are discussed below.
  • DB Mechanical non-return valve or pipe interrupters
  • Known air gap eductors provide combined back flow protection and fluid dispensing in a single unit.
  • air gap eductors have several drawbacks.
  • the stream of water passing across the air gap is exposed to air, as is the nozzle directing the water.
  • Ingress of dust or other particulates from the operating environment may interfere with the performance of the jet, which can cause increased splash back and reduce the efficiency of the venturi stage. Obstruction of the jet will prevent effective operation of the eductor.
  • air gap eductors require regular maintenance.
  • the presence of the air gap also prevents the eductor from being used with a diluent other than water, since the diluent is exposed to air.
  • An alternative to an air gap eductor is to use a non-return valve upstream of an eductor without an air gap.
  • the non-return valve is positioned in series with the eductor and is a separate unit.
  • the convenience of a combined eductor and back flow prevention unit, as provided by the air gap eductor is lost.
  • the level of back flow protection is less than that provided by air gap eductors.
  • Other arrangements to prevent back flow are known, for example vacuum breaker arrangements.
  • An object of the present invention is to address the drawbacks of known eductor arrangements, in particular to provide a system that can be changed readily between an air gap arrangement and a non-return valve arrangement.
  • an eductor comprising a venturi structure, an air gap across which in air gap operational mode a liquid jet is passed to the venturi structure and a removable non-return valve located in the air gap, whereby the eductor is convertible between air gap operational mode and non-return valve operational mode.
  • the removable non-return valve may have any suitable non-return mechanism, e.g. selected from those known to the person skilled in the art.
  • the removable non-return valve may be selected to provide a particular degree of back flow protection.
  • the non-return valve may have one or more exit ports to allow fluid to vent from the eductor in the event of a back flow situation.
  • the removable non-return valve is constructed from material or materials resilient to chemicals that are likely to be encountered during normal operation.
  • This arrangement allows the eductor to operate either as an air gap eductor or a non-return valve eductor by simply adding or removing the non-return valve.
  • the non-return valve may be substituted for a nozzle in the eductor which provides the liquid jet across the air gap.
  • an eductor which can be easily converted between an air gap arrangement and a non-return valve arrangement, in e.g. a water dilution system, because the water source, flow rate and concentrated liquid may be changed during the lifetime of an eductor and so the requirements for back flow protection may also change.
  • the present invention provides an eductor having increased utility compared with known eductors because it can be used where air gap protection is required and where non-return valve back fill protection is required.
  • An eductor having a removable non-return valve according to the present invention may be adapted between air gap or non-return valve arrangements on site. This has significant advantages over known arrangements which cannot be adapted in this way and which would require the entire eductor arrangement to be replaced if the back flow protection requirements changed.
  • the present invention therefore provides savings in time and money when changing between an air gap and non-return valve arrangements.
  • non-return valve cartridge adapted to be removably installed in an air gap of an eductor having an air gap and a venturi inlet zone
  • the non-return valve cartridge comprises an inlet adapted to receive water from a supply line and an outlet adapted to deliver water to the venturi inlet zone, and a non-return valve between the inlet and the outlet.
  • the outlet comprises a sealing surface to provide sealing contact with the venturi inlet zone.
  • the inlet comprises a sealing surface to provide sealing contact with the supply line.
  • the non-return valve cartridge has a core, an expandable resilient sleeve arranged around and in sealing contact with the core to prevent fluid flow between the sleeve and the core, the sealing contact being broken when the resilient sleeve is expanded, wherein the resilient sleeve is expanded by fluid pressure from the inlet.
  • the non-return valve cartridge comprises an outer casing arranged around the resilient sleeve to limit the extent of expansion of the sleeve and seal to the sleeve during flow from the inlet to the outlet.
  • a back flow of water may pass between the outer casing and the sleeve when the path from the inlet to the outlet is closed.
  • the outer casing comprises an aperture through which fluid may exit the non-return valve if back flow occurs.
  • a non-return valve cartridge which can be reversibly installed in the air gap of an air gap eductor can provide a cheap and efficient way of modifying existing air gap eductors so that they operate with a non-return valve.
  • the present invention provides the means to modify the back flow protection of an eductor and provide the advantages of non-return valve protection without the expense and inconvenience of replacing the eductor unit or installing a separate non-return valve unit.
  • a method of adapting an air gap eductor having a venturi mixing portion and an air gap comprising installing a non-return valve in said air gap.
  • a mechanical barrier to back flow in the form of a non-return valve, may be particularly suitable when toxic or harmful fluids are used in the eductor.
  • Figs. 1 to 3 show an eductor 1 embodying the present invention, arranged in an upright position and comprising an inlet portion 2, a venturi structure 3, a main body 4 having an open ended horizontal cylindrical structure which defines an air gap 5 between the inlet portion 2 and the venturi structure 3.
  • the venturi structure 3 comprises an inlet 6, a side passage 7 for delivering concentrated liquid to the venturi structure 3, and an outlet portion 8.
  • the venturi structure 3 also comprises a venturi body (not shown) where mixing of the water and concentrated liquid occurs, and bypass passages (not shown) for liquid flow around the venturi body.
  • the venturi structure 3 is conventional and need not be described in detail here.
  • Fig. 1 also partially shows a water supply conduit 10 which delivers water to the eductor 1.
  • the conduit 10 includes a manually operable shut-off valve 11 in a conventional manner and a connection pipe 12 which is lockable into the inlet portion 2 by a bayonet fitting.
  • the inlet portion 2 contains, in conventional manner, a nozzle (not shown) which is sealed to the connection pipe 12 and directs a jet of water across the open air gap to the inlet 6 of the venturi structure 3.
  • a removable non-return valve 19 is shown in an exploded view in Fig. 1 and in use is located within the main body 4, in the air gap 5 (as shown in Fig. 3).
  • the non-return valve 19 comprises a core structure 20, a reversibly expandable resilient sleeve 25 acting as the valve member and an outer casing 26.
  • the core structure 20 has an inlet tube 21 in an upper part for receiving water from the water supply conduit 10, an elongate stem 22 extending below the inlet 21 and fluid outlets 23 (see Fig. 3) between ribs 24 connecting the inlet tube 21 and the elongate stem 22.
  • the expandable sleeve 25 is made from a rubber material, such as a silicone rubber, and covers the elongate stem 22 and the outlets 23 of the core structure 20 when the valve is assembled.
  • a rubber material such as a silicone rubber
  • the outer casing 26 comprises a main body 27 made from a rigid plastics material with a reinforcing helical rib 27a, vents 28 to allow fluid to pass from inside the outer casing into the air gap 5 when the valve is assembled and located in the air gap, and an outlet tube 29 for engaging the venturi inlet 6.
  • the outer casing surrounds the expandable sleeve 25 and core structure 20.
  • the inlet tube 21 of the non-return valve 19 has two 0-rings 21a by which it seals to the connection pipe 12 when inserted therein.
  • the outlet tube 29 has an O-ring 29a by which it seals to the inlet 6 of the venturi structure 3 when inserted therein.
  • the non-return valve cartridge is inserted into the eductor to correct it from air gap operational mode to non-return valve operational mode by uncoupling the supply 10 from the inlet portion 2, removing the water jet nozzle (not shown) from the inlet portion 2, inserting the valve 19 into and through the inlet portion so that the outlet tube 29 enters the inlet 6, and reconnecting the supply 10 to seal it to the inlet tube 21.
  • the upper end of the outer casing 26 in the assembled state presses the flange 25a of the sleeve 25 against the lower end of the inlet tube 21 to make a seal at this point.
  • a flow of water enters the inlet tube 21 from water supply 10 and exits the tube through the outlets 23.
  • the pressure of water causes the resilient sleeve 25 to expand away from the elongate stem 22. This expansion provides a flow pathway between the sleeve 25 and the stem 22.
  • the sleeve 25 expands to meet the main body 27 of the outer casing 26, which limits the extent to which the sleeve 25 can expand and seals the flow path through the valve 19 from its inlet to its outlet.
  • the water flows from the inlet tube 21 to the outlet tube 29 of the outer casing.
  • the outlet tube 29 creates a water jet directed into the venturi inlet 6 to cause entrainment of concentrated liquid supplied via the side passage 7 in the venturi in a known manner.
  • the water and entrained liquid exit the eductor at outlet portion 8.
  • the resilient sleeve 25 contracts and fits tightly around the elongate member 22, and in sealing contact with it. This will prevent any reverse flow of water through the non-return valve 19 to the water supply 10.
  • Fig. 3 shows the eductor with the non-return valve 19 assembled and located inside the main body 4, in the air gap 5.
  • the vents 28 in the main body 27 of the non-return valve 19 can be seen through the open ends of main body 4. Fluid flowing out of the non-return valve 19 through vents 28, for example in the situation where a back flow occurs in the venturi structure 3, is able to pass into the air gap and exit the eductor 1 through the open ends of the main body 4.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Check Valves (AREA)
  • Nozzles (AREA)
  • Saccharide Compounds (AREA)

Claims (6)

  1. Ejecteur comprenant une structure de type venturi (3), un intervalle d'air (5) à travers lequel, en mode de fonctionnement à intervalle d'air, un jet de liquide passe dans la structure de type venturi (3) et un clapet de non-retour amovible (19) situé dans l'intervalle d'air (5), moyennant quoi l'éjecteur est convertible entre un mode de fonctionnement à intervalle d'air et un mode de fonctionnement à clapet de non-retour.
  2. Ejecteur selon la revendication 1, dans lequel, en mode de fonctionnement à intervalle d'air, l'éjecteur comporte une buse pour fournir ledit jet de liquide, la buse étant amovible et remplacée par le clapet de non-retour (19) lors d'une conversion.
  3. Ejecteur selon la revendication 1 ou la revendication 2, dans lequel le clapet de non-retour comporte une sortie (29) fournissant, en utilisation, un jet de fluide dirigé vers la structure de type venturi.
  4. Ejecteur selon l'une quelconque des revendications 1 à 3, dans lequel le clapet de non-retour fournit un premier chemin d'écoulement fermé hermétiquement à travers l'intervalle d'air lorsqu'il est ouvert pour qu'un liquide s'écoule vers la structure de type venturi et fournit un second chemin d'écoulement pour un écoulement retour depuis la structure de type venturi vers l'intervalle d'air hors du clapet de non-retour lorsque ledit premier chemin d'écoulement est fermé.
  5. Procédé d'adaptation d'un éjecteur à intervalle d'air comprenant une partie de mélange de type venturi (3) et un intervalle d'air (5), comprenant l'installation d'un clapet de non-retour (19) dans ledit intervalle d'air.
  6. Procédé selon la revendication 5, dans lequel l'éjecteur à intervalle d'air comprend une buse destinée à diriger un jet d'eau et le procédé comprend l'étape consistant à retirer la buse de l'éjecteur.
EP03746544A 2002-04-09 2003-03-20 Ejecteur Expired - Lifetime EP1485539B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03746544A EP1485539B1 (fr) 2002-04-09 2003-03-20 Ejecteur

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP02252539 2002-04-09
EP02252539A EP1353012A1 (fr) 2002-04-09 2002-04-09 Dispositif d'éduction
EP03746544A EP1485539B1 (fr) 2002-04-09 2003-03-20 Ejecteur
PCT/US2003/008428 WO2003087483A1 (fr) 2002-04-09 2003-03-20 Ejecteur

Publications (2)

Publication Number Publication Date
EP1485539A1 EP1485539A1 (fr) 2004-12-15
EP1485539B1 true EP1485539B1 (fr) 2005-05-25

Family

ID=28051843

Family Applications (2)

Application Number Title Priority Date Filing Date
EP02252539A Withdrawn EP1353012A1 (fr) 2002-04-09 2002-04-09 Dispositif d'éduction
EP03746544A Expired - Lifetime EP1485539B1 (fr) 2002-04-09 2003-03-20 Ejecteur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP02252539A Withdrawn EP1353012A1 (fr) 2002-04-09 2002-04-09 Dispositif d'éduction

Country Status (13)

Country Link
EP (2) EP1353012A1 (fr)
JP (1) JP2006501047A (fr)
KR (1) KR20040106334A (fr)
CN (1) CN1314479C (fr)
AT (1) ATE296384T1 (fr)
AU (1) AU2003225867A1 (fr)
BR (1) BR0309066A (fr)
CA (1) CA2480492A1 (fr)
DE (1) DE60300719T2 (fr)
ES (1) ES2239309T3 (fr)
MX (1) MXPA04009851A (fr)
NZ (1) NZ535703A (fr)
WO (1) WO2003087483A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070028980A1 (en) 2005-08-02 2007-02-08 Lohr James H Mixing eductor
US7445025B2 (en) * 2006-03-13 2008-11-04 Itt Manufacturing Enterprises, Inc Combination valve
CN203546865U (zh) * 2012-03-13 2014-04-16 纽珀有限公司 用于坐浴器的回流截止器
CN107130401B (zh) * 2014-09-11 2019-01-01 南安市丽迪家居用品有限公司 一种复位阀及选用这种复位阀的分体式流量阀
CN105457515B (zh) * 2014-09-12 2017-08-25 中山市雅西环保科技有限公司 一种同步混合装置
US10550012B2 (en) * 2018-01-05 2020-02-04 Culligan International Company Softener eductor with embedded check valve

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3607606A1 (de) * 1986-03-07 1987-09-24 Dagma Gmbh & Co Wasserstrahl-injektionsvorrichtung an dispensern zum herstellen und abgeben von mischgetraenken aus fruchtsirup oder konzentrat und wasser
US5253677A (en) 1991-07-18 1993-10-19 Hydro Systems Company Chemical eductor with integral elongated air gap
CN2239841Y (zh) * 1995-04-03 1996-11-13 安赫洛·马塞 混合注射器
US5522419A (en) 1995-06-26 1996-06-04 Hydro Systems Company Chemical eductor with integral elongated air gap

Also Published As

Publication number Publication date
ES2239309T3 (es) 2005-09-16
CN1653235A (zh) 2005-08-10
DE60300719T2 (de) 2005-10-13
ATE296384T1 (de) 2005-06-15
CN1314479C (zh) 2007-05-09
AU2003225867A1 (en) 2003-10-27
JP2006501047A (ja) 2006-01-12
EP1353012A1 (fr) 2003-10-15
MXPA04009851A (es) 2004-12-07
CA2480492A1 (fr) 2003-10-23
BR0309066A (pt) 2005-02-22
EP1485539A1 (fr) 2004-12-15
KR20040106334A (ko) 2004-12-17
NZ535703A (en) 2006-07-28
DE60300719D1 (de) 2005-06-30
WO2003087483A1 (fr) 2003-10-23

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