EP0672221B1 - Pompe de dosage comportant une soupape de degagement d'air - Google Patents

Pompe de dosage comportant une soupape de degagement d'air Download PDF

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Publication number
EP0672221B1
EP0672221B1 EP94901899A EP94901899A EP0672221B1 EP 0672221 B1 EP0672221 B1 EP 0672221B1 EP 94901899 A EP94901899 A EP 94901899A EP 94901899 A EP94901899 A EP 94901899A EP 0672221 B1 EP0672221 B1 EP 0672221B1
Authority
EP
European Patent Office
Prior art keywords
valve
metering pump
displacement
pump
chamber
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
EP94901899A
Other languages
German (de)
English (en)
Other versions
EP0672221A1 (fr
Inventor
Joachim Klein
Herbert Hunklinger
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.)
Ecolab Engineering GmbH
Original Assignee
Lang Apparatebau GmbH
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 Lang Apparatebau GmbH filed Critical Lang Apparatebau GmbH
Publication of EP0672221A1 publication Critical patent/EP0672221A1/fr
Application granted granted Critical
Publication of EP0672221B1 publication Critical patent/EP0672221B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/06—Venting

Definitions

  • the invention relates to a metering pump for metered conveying of liquids with a suction valve built into a suction line coming from a suction tank, a pump chamber behind it with a pump element changing its displacement volume, a pressure valve leading to the metering line connection and a ventilation and bypass built into a return line leading to the suction tank -Valve.
  • a metering pump of the above type is known from FR-PS 21 20 945. It is designed as a piston diaphragm pump, which has a comparatively large pump chamber, which has a suction valve at the bottom and a vent valve at the top, and a comparatively small metering cylinder space to be separated from it by a metering piston that is to be driven back and forth in the middle of a pumping membrane that forms the pump element which branches off the pressure valve to the metering line connection.
  • the invention is therefore based on the object of improving and perfecting a metering pump of the type mentioned at the outset in such a way that if the metering liquid is adequately vented, the necessary return flow via the venting and bypass valve is as small as possible and thus also the drive expenditure and the susceptibility to wear allowed to be kept correspondingly small.
  • This object is achieved on the basis of a metering pump of the type mentioned at the outset in that between the pressure valve and the pump chamber a valve chamber is provided which is separated from the latter by a non-return central valve and a movable control wall, into which the valve chamber controlled by the control wall is located at the respective position Suction stroke of the pump goose opening and during its pressure stroke closing vent valve is installed.
  • the metering pump can be operated in such a way that practically the entire amount of metering liquid conveyed by its pumping element is pressed into the metering line connection via the pressure valve, whereby during the respective suction stroke of the pumping element a permanent automatic venting of the metering back pressure that is independent Valve chamber is guaranteed via its ventilation and bypass valve.
  • a movable displacement wall the volume of which changes in the opposite direction to the control wall and is under pretension, is provided in the valve chamber. This can ensure that during the respective suction stroke of the pumping goose and the associated suction movement of the control wall and the opening of the ventilation and bypass valve caused by the latter, no back-suction to the valve chamber can occur, at least not if the displacement volume, especially as Membrane formed displacement wall is at least as large as the displacement volume of the control wall, in particular also designed as a membrane.
  • the displacement volume of the pumping gans which preferably consists of a conveying membrane to be driven back and forth, is in any case larger than that of the control membrane, preferably larger than its double displacement volume.
  • the control membrane along with the middle valve and the vent valve on the one hand and the pressure valve and the displacement membrane on the other hand are arranged opposite each other in the valve space below and above or to the left and right thereof.
  • the center valve is preferably integrated in the control membrane.
  • the latter can be provided in the center with a valve bushing which has the valve bore and the valve seat of the central valve and a support bush which is screwed thereto for the valve body of the venting valve connected thereto via individual support arms.
  • a pressure spring which places the valve ball at about 1 bar pretension and on the compensating diaphragm a pressure spring which sets it at about 0.5 bar.
  • the metering pump shown is provided with a basic housing body 1 and a valve housing 3 which is screw-connected to it via an intermediate body 2 and in which the valve chamber 4 is located.
  • the pump chamber 5 is located in the basic housing 1 with the pump element 6 present therein, which essentially consists of a delivery membrane 7 to be driven back and forth in the direction of the arrows.
  • the drive motor required for this is not shown.
  • the suction valve 8 is provided, the valve body of which, designed as a valve ball 8 ', rests on the seat seal 10 located in the connecting piece 9 or is pressed against it by the compression spring 8 " Suction tank to connect incoming suction line.
  • the pump chamber 5 is to be connected to the valve chamber 4 via the center bore 11 penetrating the intermediate body 2 and the non-return center valve generally designated 12 or to be separated therefrom in the closed position of the center valve.
  • the control membrane 13 is for this provided in the center with a valve sleeve 16 forming the valve bore 14 and the valve seat 15, which rests on the intermediate body 2 via arms 16 ′ present on it at the bottom such that the control diaphragm 13 is always completely acted upon by the liquid pressure present in the central bore 11.
  • a compression spring 17 is arranged which acts on the control wall or membrane 13 in the direction of the valve chamber 4.
  • the valve sleeve 16 is screwed under clamping of the inner parts of the control membrane 13 to the support sleeve 18, on which there are support arms 18 'which hold the control membrane 13 or its support sleeve 18 with the valve body 19 of the ventilation and bypass valve, generally designated 20 connect.
  • the valve body 19 is clipped with its lower end between the upper ends of the support arms 18 'like a barb. It is additionally held in it by the pressure spring 12 ′′, which is supported on the underside of it and presses the valve ball 12 ′ of the central valve 12 against its valve seat 15.
  • the pressure spring 12 ′′ and the valve ball 12 ′ are accommodated in the space lying between the support arms 18 ′ which is in constant communication with the actual valve chamber 4 via the gaps between the support arms 18 'or belongs to it.
  • the compression spring 12 "serves to ensure the valve function. However, it can also be omitted if the valve ball 12 'is held in its closed position under its own weight.
  • connection hole 21 for a return line leading to the suction tank, not shown.
  • the valve body 19 engages in the smaller bore section 21 'with its upper, approximately cruciform profiled guide projection 19'.
  • sealing ring 19 ′′ which cooperates with the wall of the bore section 21 ′ which has a smaller diameter and forms the valve seat surface.
  • a line leading to the metering line connection 22 branches off from the valve chamber 4 with the pressure valve 23, which line is also designed as a valve ball 23 ′ which is pretensioned by a compression spring 24.
  • the valve ball 23 ' is acted upon by the spring 24 with a preload pressure of approximately 1 bar.
  • a prestressing spring 25 here designed as a diaphragm, which can change the volume of the valve chamber 4 in opposite directions to the control membrane 13.
  • This displacement membrane 26 is acted upon by the compression spring 26 acting on it with a prestressing pressure of about 0.5 bar.
  • the displacement volume of the displacement membrane 26 is equal to or slightly larger than the displacement volume of the control membrane 13.
  • the space containing the compression spring 25 is connected to the outside atmosphere via the vent hole 27.
  • the displacement volume of the displacement membrane 26 can be adjusted, for example by any screw-adjustable design of the pot base 3 'forming the spring abutment in the valve housing 3, the pot base 3' then thus forming an adjusting screw accessible from the outside. Due to the pressure spring 8 ′′ present in the suction valve 8 ′′, when counterpressure is present in the suction valve during the movement of the delivery membrane 7, a precisely defined pressure difference between the valve chamber 4 and the pump chamber 5 is achieved and thus the switching accuracy of the ventilation device is increased.
  • the center valve 12 need not necessarily be integrated into the control membrane 13. Rather, it can also be arranged separately from the latter between the valve chamber 4 and the pump chamber 5.
  • the control membrane 13 is then designed as a closed membrane, which, however, still controls the valve body 19 belonging to the vent valve 20.
  • the control membrane 13 can in principle also be replaced by a control piston, which forms the control wall and is to be arranged accordingly, with a groove or O-ring as a sealing element.
  • the displacement membrane 26 which could be replaced by an appropriately designed and arranged displacement piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • External Artificial Organs (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Jet Pumps And Other Pumps (AREA)

Claims (16)

  1. Pompe de dosage pour le refoulement dosé de liquides avec une soupape d'aspiration (8) montée dans une conduite d'aspiration venant d'un réservoir d'alimentation, une chambre de pompe (5) située derrière avec un organe de pompe (6) modifiant son volume de déplacement, une soupape de compression (23) conduisant au raccordement de la conduite de dosage (22) et une soupape de purge d'air et de by-pass (20) montée dans une conduite de retour (21) conduisant au réservoir d'alimentation,
    caractérisée en ce que
    entre la soupape de compression (23) et la chambre de pompe (5) est prévue une chambre de soupape (4) séparée de cette dernière par une soupape centrale anti-retour (12) et une paroi de commande (13) mobile, chambre (4) dans laquelle est insérée la soupape de purge (20) commandée par la paroi de commande (13), s'ouvrant lors de la course d'aspiration respective de l'organe de pompe (6) et se fermant lors de sa course de compression.
  2. Pompe de dosage selon la revendication 1,
    caractérisée en ce que
    dans la chambre de soupape (4) est prévue une paroi de déplacement mobile (26), se trouvant en prétention, modifiant son volume respectivement en sens opposé à la paroi de commande 13.
  3. Pompe de dosage selon la revendication 1,
    caractérisée en ce que
    la paroi de commande est réalisée en une membrane de commande (13).
  4. Pompe de dosage selon la revendication 1,
    caractérisée en ce que
    l'organe de pompe (6) se compose d'une membrane de refoulement (7) à manoeuvrer en va-et-vient, dont le volume de déplacement est plus grand que celui de la membrane de commande (13) et dont le volume de déplacement est à nouveau égal ou plus petit que le volume de déplacement de la paroi de déplacement (26) également réalisée sous forme de membrane.
  5. Pompe de dosage selon la revendication 4,
    caractérisée en ce que
    le volume de déplacement de la membrane de refoulement (7) est plus grand que le double du volume de déplacement de la membrane de commande (13).
  6. Pompe de dosage selon une des revendications 1 à 5,
    caractérisée en ce que
    la paroi de commande (13) avec la soupape centrale (12) et la soupape de purge d'air (20) d'une part ainsi que la soupape de compression (23) et la membrane de déplacement (26) d'autre part sont disposées dans la chambre de soupape (4) respectivement en face les unes des autres en bas et en haut ou à gauche et à droite.
  7. Pompe de dosage selon une des revendications 1 à 6,
    caractérisée en ce que
    la soupape centrale (12) est intégrée dans la membrane de commande (13).
  8. Pompe de dosage selon la revendication 7,
    caractérisée en ce que
    la membrane de commande (13) est munie au centre d'une douille de soupape (16) comportant l'alésage de soupape (14) et le siège de soupape (15) de la soupape centrale (12) et d'une douille porteuse (18) pour le corps de soupape (19) de la soupape de purge d'air (20) reliée avec lui par des bras de support individuels (18').
  9. Pompe de dosage selon la revendication 8,
    caractérisée en ce que
    le corps de soupape réalisé en bille (12') de la soupape centrale (12) et un ressort de pression (12") la sollicitant sont logés entre les bras de support (18') de la douille porteuse (18).
  10. Pompe de dosage selon la revendication 9,
    caractérisée en ce que
    le corps de soupape (19) est enclipsé entre les extrémités supérieures des bras de support (18') à la manière d'un contre-crochet et du côté inférieur est appuyé sur le ressort de compression (12") sollicitant la bille de soupape (12') de la soupape centrale (12).
  11. Pompe de dosage selon une des revendications 1 à 10,
    caractérisée en ce que
    sur la membrane de commande (13) s'accroche un ressort de compression (17) la sollicitant en direction de la chambre de soupape (4).
  12. Pompe de dosage selon une des revendications 1 à 11,
    caractérisée en ce que
    sur le corps de soupape de la soupape de compression (23) réalisée sous forme de bille (23') s'appuie un ressort de pression (24) se trouvant sous une prétension d'environ 1 bar et sur la membrane de déplacement 26) vient en prise un ressort de compression (25) sous environ 0,5 bar.
  13. Pompe de dosage selon la revendication 12,
    caractérisée en ce que
    le volume de déplacement de la membrane (26) doit s'ajuster par modification de la prétension de son ressort de compression (25), par exemple en réalisant un réglage par vis de la butée à ressort (3').
  14. Pompe de dosage selon une des revendications 1 à 14,
    caractérisée en ce que
    la soupape centrale anti-retour (12) séparée par la membrane de commande (13) est placée entre la chambre de pompe (5) et la chambre de soupape (4).
  15. Pompe de dosage selon une des revendications 1 à 4,
    caractérisée en ce que
    le corps de soupape (8') réalisé sous forme de bille de la soupape d'aspiration (8) se trouve soumis à l'effet d'un ressort de compression (8") cherchant à le comprimer contre le siège de soupape (10).
  16. Pompe de dosage selon une des revendications 1 à 15,
    caractérisée en ce que
    la paroi de commande (13) et/ou la paroi de déplacement (26) sont réalisées en piston de commande ou de déplacement.
EP94901899A 1992-12-05 1993-11-27 Pompe de dosage comportant une soupape de degagement d'air Expired - Lifetime EP0672221B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4241030A DE4241030C1 (de) 1992-12-05 1992-12-05 Dosierpumpe mit Entlüftungsventil
DE4241030 1992-12-05
PCT/EP1993/003333 WO1994013956A1 (fr) 1992-12-05 1993-11-27 Pompe de dosage comportant une soupape de degagement d'air

Publications (2)

Publication Number Publication Date
EP0672221A1 EP0672221A1 (fr) 1995-09-20
EP0672221B1 true EP0672221B1 (fr) 1996-09-18

Family

ID=6474513

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94901899A Expired - Lifetime EP0672221B1 (fr) 1992-12-05 1993-11-27 Pompe de dosage comportant une soupape de degagement d'air

Country Status (8)

Country Link
US (1) US5588809A (fr)
EP (1) EP0672221B1 (fr)
AT (1) ATE143101T1 (fr)
CA (1) CA2151030A1 (fr)
DE (2) DE4241030C1 (fr)
DK (1) DK0672221T3 (fr)
ES (1) ES2091686T3 (fr)
WO (1) WO1994013956A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4418314C1 (de) * 1994-05-26 1996-01-04 Prominent Dosiertechnik Gmbh Flüssigkeitsdosierpumpe
DE4439962A1 (de) * 1994-11-09 1996-05-15 Lang Apparatebau Gmbh Dosierpumpe mit Entlüftungseinrichtung
DE19712096C1 (de) * 1997-03-22 1998-04-02 Lang Apparatebau Gmbh Dosierpumpe zum dosierten Fördern von Flüssigkeiten
IT244069Y1 (it) * 1998-06-17 2002-03-07 Ulka Srl Dispositivo applicabile a pompa a vibrazione realizzante funzioni diautoinnesco in condizioni di contropressione di compensazione di
US6139286A (en) * 1998-09-28 2000-10-31 Pulsafeeder, Inc. Automatic venting back pressure valve
NL1025793C2 (nl) * 2004-03-23 2005-09-26 Bba Pompen B V Ontluchtingsinrichting voor een plunjerpomp.
DE102012102088A1 (de) * 2012-03-13 2013-09-19 Prominent Dosiertechnik Gmbh Verdrängerpumpe mit Zwangsentlüftung
FR3021713B1 (fr) * 2014-05-27 2019-04-05 Milton Roy Europe Pompe a membrane a commande hydraulique comprenant un chemin de degazage dedie
DE102014112833A1 (de) * 2014-09-05 2016-03-10 Prominent Gmbh Verdrängerpumpe mit Fluidreservoir
DE102016223898A1 (de) * 2016-12-01 2018-06-07 Henkel Ag & Co. Kgaa Membranventil mit Verdrängungskompensierung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB304905A (en) * 1928-01-12 1929-01-31 Otto Siemen Improvements in or relating to pump valves
US3680985A (en) * 1970-12-28 1972-08-01 Mec O Matic The Pump
US3870436A (en) * 1974-03-18 1975-03-11 Gorman Rupp Co Air release valve for self-priming pumps
DE2803470B2 (de) * 1978-01-27 1980-06-04 Dulger, Viktor, 6900 Heidelberg Entlüftungsvorrichtung fur eine Flussigkeitskolbenpumpe, insbesondere Dosierpumpe
US4507054A (en) * 1982-06-28 1985-03-26 Carr-Griff, Inc. Liquid dispensing system
DE3631984C1 (de) * 1986-09-19 1987-12-17 Hans Ing Kern Dosierpumpe
DE3631982C1 (de) * 1986-09-19 1988-02-04 Hans Ing Kern Dosierpumpe
DE3827489C1 (fr) * 1988-08-12 1989-10-12 Gruenbeck Wasseraufbereitung Gmbh, 8884 Hoechstaedt, De

Also Published As

Publication number Publication date
WO1994013956A1 (fr) 1994-06-23
DE4241030C1 (de) 1994-06-01
DE59303903D1 (de) 1996-10-24
DK0672221T3 (fr) 1997-03-17
CA2151030A1 (fr) 1994-06-23
EP0672221A1 (fr) 1995-09-20
US5588809A (en) 1996-12-31
ATE143101T1 (de) 1996-10-15
ES2091686T3 (es) 1996-11-01

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