EP0603233B1 - Pompe a membrane a piston pour refoulement dose de liquides - Google Patents

Pompe a membrane a piston pour refoulement dose de liquides Download PDF

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Publication number
EP0603233B1
EP0603233B1 EP92918598A EP92918598A EP0603233B1 EP 0603233 B1 EP0603233 B1 EP 0603233B1 EP 92918598 A EP92918598 A EP 92918598A EP 92918598 A EP92918598 A EP 92918598A EP 0603233 B1 EP0603233 B1 EP 0603233B1
Authority
EP
European Patent Office
Prior art keywords
pump
piston
diaphragm
pressure chamber
pump piston
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
EP92918598A
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German (de)
English (en)
Other versions
EP0603233A1 (fr
Inventor
Herbert Hunklinger
Joachim Klein
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
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Filing date
Publication date
Application filed by Lang Apparatebau GmbH filed Critical Lang Apparatebau GmbH
Publication of EP0603233A1 publication Critical patent/EP0603233A1/fr
Application granted granted Critical
Publication of EP0603233B1 publication Critical patent/EP0603233B1/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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/046—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor

Definitions

  • the invention relates to a piston diaphragm pump for the metered delivery of liquids, in particular surfactants, wetting agents or the like , Peripherally clamped in the pump housing and with one side facing the pump suction chamber pump membrane, which is penetrated centrally by the pump piston provided with a continuous longitudinal bore connecting the pressure chamber with the suction chamber and a piston valve installed therein.
  • a piston diaphragm pump of the above type is known from DE-OS 28 31 437. While the respective suction of the liquid into the suction chamber takes place via the flexible membrane, the liquid to be dosed is displaced out of the pressure chamber solely by the one firmly connected to the membrane Pump piston, which is sealingly guided in the pump tube surrounding the pressure chamber. This not only requires an appropriate seal, but can also cause the pump piston to stick if the metering liquid dries up after long periods of inactivity.
  • the pump piston has a substantially smaller effective cross-section than the pump diaphragm and both work with the same stroke height due to their fixed connection on both sides, less liquid is always displaced out of the pump pressure chamber during the respective delivery stroke than liquid is sucked in via the membrane into the suction chamber .
  • the suction chamber must be connected to the liquid storage container via a special liquid line which can be shut off by a non-return valve in order to return the excess amount of liquid conveyed into the suction chamber during the respective return stroke of the pump membrane back into the storage container.
  • Another disadvantage of the known pump is that the pump piston, because of its comparatively small delivery cross-section and thus ultimately also the membrane, has to perform comparatively large stroke movements in order to be able to deliver a certain amount of liquid in a metered manner.
  • the invention is therefore based on the object of improving and perfecting a piston diaphragm pump of the type mentioned at the outset in that it does not have the abovementioned shortcomings, rather manages with shorter pump strokes to convey comparable amounts of liquid, does not require a sealed guidance of the pump piston in the pump tube and therefore also prevents the piston from seizing after a long period of inactivity.
  • this object is achieved according to the invention in that the working space located on the side of the pump diaphragm facing away from the suction space serves as an additional pump pressure space, which has transverse channels in the pump piston behind the piston valve with the piston leading to the pump tube pressure space. Longitudinal bore is constantly connected.
  • the piston valve is expediently provided in the immediate vicinity of the pump piston end penetrating the pump membrane and the transverse channels immediately behind it. This results in a compact design in the part of the pump on the pressure chamber side, in particular if the pump housing is constricted in a funnel shape towards the pump pipe in its area surrounding the transverse channels and the membrane pressure chamber.
  • a pump piston stop provided with a seal is advantageously provided in the housing part surrounding the pump suction chamber, which acts in the region of the stop position of the pump piston caused by the return spring as a safety valve separating the pressure chamber from the suction chamber.
  • the invention also provides that a rectifier converting its supply current into pulsating direct current is installed in the current supply line to the magnetic coil , which is preferably integrated in the pump housing part surrounding the electromagnetic coil. This ensures a quiet and energy-saving diaphragm pump drive via the pump piston, which acts as an electrical anchor. It goes without saying that the switching on and switching off of the electro-magnetic diaphragm drive is generally controlled by a pulse generator which is built into the consumer line or container to be charged with the liquid to be dosed and which responds to the metering liquid requirement present here in each case.
  • the piston diaphragm pump shown has a multiply subdivided pump housing 1, which is divided into an upper suction region 1 'and a lower pressure region 1' ', which also contains the pump drive, by the pump diaphragm 2 clamped in its circumference in the housing.
  • the suction chamber 4 In the suction area 1 'is between the housing part 3 and the membrane 2, the suction chamber 4. This is via the suction valve consisting of the spring 5, the valve ball 6 and the associated seal 7 via the connecting piece 8 and a feed line to be attached to it, with a not shown Connect the metering liquid reservoir. Furthermore, the stroke adjustment screw 9, which is adjustably mounted therein, is located in the upper housing part 3. It is guided in a sealed manner with respect to the housing part 3 via the O-ring 10. Furthermore, the stroke adjustment screw 9 has a front end 9 'with a diameter which, together with the O-ring 11 embedded therein, acts both as a pump piston stop and in cooperation with the facing pump piston end as a safety valve, as will be described in more detail below.
  • the pump tube 13 which surrounds the pump pressure chamber 12 and which is firmly connected at its upper end to the middle housing part 14.
  • This housing part 14 is funnel-shaped towards the pump tube 13 narrowed. It encloses with the pump membrane 2 an additional pump pressure chamber 12 'which is in constant communication with the above-mentioned pressure chamber 12 enclosed by the tube 13.
  • the pump piston 15 which is made of soft iron, is guided such that it can be moved.
  • This pump piston is firmly connected at its upper end 15 'to the membrane 2, which is penetrated centrally by it.
  • the bushing 16 which is to be screwed onto the pump piston end 15 'and which projects above the piston end 15' and, in the illustrated rest position of the pump piston 15, engages over the front end 9 'and the O-ring seal 11 of the stroke adjustment screw 9 thereon and thus acts as a safety valve .
  • the pump piston 15 is under the action of the return spring 17, which tries to keep it in the rest position shown.
  • the piston 15 is further provided with a continuous longitudinal bore 18, at the upper end in the immediate vicinity of the membrane 2, the piston valve consisting of the valve ball 19 and the return spring 20 is installed.
  • the abutment piece 21 installed in the longitudinal bore 18 of the piston 15 serves to support the two springs 17 and 20.
  • the transverse channels 22 are incorporated in the piston, via which the diaphragm pressure chamber 12 'with the longitudinal bore 18 and thus also with the pressure chamber 12 is constantly connected.
  • the rooms 12 and 12 'thus form a common, comparatively large-volume pump pressure chamber.
  • the pump pressure chamber 12 is closed on the underside by the closure piece 23, which is firmly connected to the pump tube 13 and which contains the pump pressure valve consisting of the spring 24 and the valve ball 25, which shut off or open the pressure line channel 26 located in the closure piece 23 leading to the consumer allowed.
  • the magnet coil 27 is arranged, which, with appropriate current excitation, allows the pump piston 15 to be driven against the action of the return spring 17 acting on it for the respective medium delivery.
  • the magnetic coil 27 is covered by the plastic jacket 28 and this in turn is enclosed by the housing part 29 on which the two power line connections 30 are located on the outside.
  • a known rectifier (not shown) is accommodated in the housing 29, which converts the supply current to the solenoid 27 into pulsating direct current.
  • the solenoid 27 is energized by a pulse generator (not shown) that is present in the consumer area and monitors the metering liquid requirement, the pump piston 15 and the diaphragm 2 firmly connected to it are moved downwards in the drawing, thereby firstly metering liquid from the common pressure chamber 12, 12 'is fed into the consumer line via the pressure valve 25, while on the other hand through the membrane 2 the suction chamber 4 is refilled with the corresponding metering liquid quantity via the then opening suction valve 6.
  • the piston valve 19 is closed during the membrane and piston movement described above. If the electromagnetic drive is switched off after sufficient metered liquid has been delivered, the pump piston 15 and the membrane 2 firmly connected to it return to their rest position shown in the drawing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Claims (8)

  1. Pompe à piston et membrane pour le refoulement dosé de liquides, en particulier d'agents tensio-actifs, d'agents mouillants ou l'équivalent, comprenant un piston (15) à coulissement guidé dans un cylindre de pompe (13) délimitant la chambre de compression (12) de la pompe, et susceptible d'être entraîné par de l'énergie électromagnétique produite par une bobine magnétique (27) entourant ledit cylindre, à l'encontre de l'action d'un ressort de rappel (17), ainsi qu'une membrane (2), solidarisée audit piston du côté aspiration, enserrée sur sa périphérie dans le carter (1) de la pompe et orientée, d'un de ses côtés, vers la chambre d'aspiration (4) de la pompe, ladite membrane étant traversée, en son centre, par le piston (15) pourvu d'un alésage longitudinal continu (18), reliant la chambre de compression (12) à la chambre d'aspiration (4), et d'un clapet de piston (19) implanté dans cet alésage, caractérisée en ce que la chambre de travail se trouvant du côté de la membrane orienté à l'opposé de la chambre d'aspiration (4), sert de chambre de compression supplémentaire (12'), qui est toujours en communication, par l'intermédiaire de canaux transversaux (22) prévus dans le piston (15), derrière son clapet (19), avec l'alésage longitudinal (18) du piston conduisant à la chambre de compression (12) du cylindre de la pompe.
  2. Pompe selon la revendication 1, caractérisée en ce que le clapet de piston (19) est prévu à proximité immédiate de l'extrémité (15') du piston traversant la membrane (2), et les canaux transversaux (22) sont prévus immédiatement derrière lui.
  3. Pompe selon la revendication 2, caractérisée en ce que dans sa zone (14) entourant les canaux transversaux et la chambre de compression (12') de la membrane, le carter de pompe (1) s'évase, en présentant un étranglement vers le cylindre de pompe (13).
  4. Pompe selon l'une des revendications 1 à 3, caractérisée en ce que dans la partie de carter (3) entourant la chambre d'aspiration (4) de la pompe, il est prévu une butée de piston munie d'un joint (11), cette butée agissant comme une soupape de sûreté séparant la chambre de compression (12, 12') de la chambre d'aspiration (4), dans la zone de la position d'appui contre la butée du piston (15) engendrée par le ressort de rappel (17).
  5. Pompe selon la revendication 4, caractérisée en ce que la butée du piston est formée par l'extrémité frontale (9'), pointée vers le piston (15), d'une vis de réglage de levée (9) montée avec une possibilité de réglage dans le carter (3), ladite extrémité frontale étant de diamètre réduit, dotée d'un anneau d'étanchéité torique (11) servant de joint, et susceptible d'être éclipsée de façon étanche par l'extrémité (15') du piston (15) qui lui fait face, lorsque cette dernière est en position d'appui contre la butée.
  6. Pompe selon la revendication 5, caractérisée en ce qu'il est prévu, sur l'extrémité (15') du piston (15) traversant la membrane (2), une douille filetée (16) serrant la membrane (2) sur ladite extrémité, et avec laquelle le piston (15) s'engage, dans sa position de repos ou d'appui contre la butée, par-dessus l'extrémité frontale (9') de la vis de réglage de levée (9).
  7. Pompe selon l'une des revendications 1 à 6, caractérisée en ce qu'un redresseur transformant le courant d'alimentation, en courant continu pulsé, est implanté dans la ligne d'alimentation en courant desservant la bobine magnétique (27).
  8. Pompe selon la revendication 7, caractérisée en ce que le redresseur est intégré dans la partie (29) du carter de la pompe entourant la bobine électromagnétique (27).
EP92918598A 1991-09-11 1992-09-03 Pompe a membrane a piston pour refoulement dose de liquides Expired - Lifetime EP0603233B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4130166 1991-09-11
DE4130166A DE4130166C1 (fr) 1991-09-11 1991-09-11
PCT/EP1992/002029 WO1993005293A1 (fr) 1991-09-11 1992-09-03 Pompe a membrane a piston pour refoulement dose de liquides

Publications (2)

Publication Number Publication Date
EP0603233A1 EP0603233A1 (fr) 1994-06-29
EP0603233B1 true EP0603233B1 (fr) 1996-03-20

Family

ID=6440337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92918598A Expired - Lifetime EP0603233B1 (fr) 1991-09-11 1992-09-03 Pompe a membrane a piston pour refoulement dose de liquides

Country Status (10)

Country Link
US (1) US5492449A (fr)
EP (1) EP0603233B1 (fr)
JP (1) JP3288043B2 (fr)
AT (1) ATE135798T1 (fr)
AU (1) AU659489B2 (fr)
CA (1) CA2118799C (fr)
DE (2) DE4130166C1 (fr)
DK (1) DK0603233T3 (fr)
ES (1) ES2084378T3 (fr)
WO (1) WO1993005293A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE19515782A1 (de) * 1995-04-28 1996-10-31 Ficht Gmbh Kraftstoff-Einspritzvorrichtung für Brennkraftmaschinen
CH688811A5 (de) * 1995-05-26 1998-04-15 Trimed Ag Muttermilchpumpe.
DE19712096C1 (de) * 1997-03-22 1998-04-02 Lang Apparatebau Gmbh Dosierpumpe zum dosierten Fördern von Flüssigkeiten
US5913665A (en) * 1997-03-28 1999-06-22 Tetra Laval Holdings & Finance, Sa Fill pump with rolling diaphragms attached by vacuum to the piston
DE29708906U1 (de) * 1997-05-21 1997-07-17 Lang Apparatebau Gmbh, 83313 Siegsdorf Kolbenmembranpumpe mit dichtungsloser Kolben-Zylindereinheit
US6099269A (en) * 1997-10-06 2000-08-08 Fin Robur Absorption refrigeration system having a diaphragm pump and a hydraulic piston pump
US6021925A (en) * 1998-04-21 2000-02-08 Millipore Corporation Apparatus for dispensing precise volumes of a liquid
DE19844163C1 (de) * 1998-09-25 2000-01-05 Ficht Gmbh & Co Kg Pumpverfahren und Pumpvorrichtung
FR2797260B1 (fr) * 1999-08-03 2002-03-01 Sidel Sa Dispositif de commande d'un debit de fluide et machine de remplissage comportant un tel dispositif
GB2366335B (en) * 2000-08-22 2004-09-01 Imi Cornelius Valve
ITMI20010420A1 (it) * 2001-03-01 2002-09-01 Inc Dell Orto S P A Pompa comandata da elettromagnete
US6997921B2 (en) * 2001-09-07 2006-02-14 Medtronic Minimed, Inc. Infusion device and driving mechanism for same
US20090118711A1 (en) * 2001-09-07 2009-05-07 Medtronic, Inc. Reduced-noise implantable infusion device
US6932584B2 (en) * 2002-12-26 2005-08-23 Medtronic Minimed, Inc. Infusion device and driving mechanism and process for same with actuator for multiple infusion uses
US7631788B2 (en) * 2003-10-15 2009-12-15 Zavida Coffee Company Inc Fluid dispensing system suitable for dispensing liquid flavorings
US7494028B2 (en) * 2003-10-15 2009-02-24 Zavida Coffee Company Inc. Fluid dispensing system suitable for dispensing liquid flavorings
US20070134112A1 (en) * 2005-12-14 2007-06-14 Hupp Evan L Button diaphragm piston pump
US7673819B2 (en) * 2006-06-26 2010-03-09 Battelle Memorial Institute Handheld sprayer with removable cartridge and method of using same
WO2008002556A1 (fr) * 2006-06-26 2008-01-03 Battelle Memorial Institute Cartouche à garniture à action automatique destinée à une vis-mère mouillée
ATE512300T1 (de) * 2006-07-12 2011-06-15 Delphi Tech Holding Sarl Dosierpumpe für eines reduktionsmittels
WO2008090137A1 (fr) * 2007-01-23 2008-07-31 Inergy Automotive Systems Research (Société Anonyme) Procédé pour injecter un additif liquide dans un réservoir de carburant
FR2911641B1 (fr) * 2007-01-23 2009-03-13 Inergy Automotive Systems Res Pompe de dosage.
US9968733B2 (en) * 2008-12-15 2018-05-15 Medtronic, Inc. Air tolerant implantable piston pump
DE102010047365A1 (de) * 2010-10-05 2012-04-05 Krones Aktiengesellschaft Vorrichtung zum Fördern von Flüssigkeiten
EP2503122B1 (fr) * 2011-03-22 2014-10-08 Delphi International Operations Luxembourg S.à r.l. Ensemble formant pompe de dosage de réactifs
DE102012200501A1 (de) * 2012-01-13 2013-07-18 Robert Bosch Gmbh Mikrodosierpumpe und Verfahren zum Herstellen einer Mikrodosierpumpe
ES1123905Y (es) * 2014-08-19 2015-01-23 Teylor Intelligent Processes Sl Empresa Sistema magnético para bomba de camara estanca
CN109296524A (zh) * 2018-11-22 2019-02-01 邹俊 一种用于陶瓷压铸机的无动力自吸送料泵
DE102022115955A1 (de) 2022-06-27 2023-12-28 Prominent Gmbh Dosierpumpe mit Hubeinstellung

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Publication number Priority date Publication date Assignee Title
CA593400A (en) * 1960-03-01 The S.U. Carburetter Company Limited Electrically-operated pumps
FR54797E (fr) * 1946-07-10 1950-08-01 Mécanisme moteur à mouvement alternatif et son application aux pompes volumétriques
US3381616A (en) * 1966-07-13 1968-05-07 Bendix Corp Electromagnetic fluid pump
US3518030A (en) * 1968-04-12 1970-06-30 Gen Motors Corp Fluid supply system
DE2831437C2 (de) * 1978-07-18 1983-12-15 Webasto-Werk W. Baier GmbH & Co, 8035 Gauting Förder- und Dosierpumpe
US4278406A (en) * 1979-11-07 1981-07-14 R. W. Beckett Corporation Electromagnetic pump
US4383504A (en) * 1981-11-23 1983-05-17 Outboard Marine Corporation Marine propulsion device with mechanical fuel pressure operated device for supplying a fuel/oil mixture
US4643653A (en) * 1984-10-15 1987-02-17 Jidosha Kiki Co., Ltd. Electromagnetic pump

Also Published As

Publication number Publication date
EP0603233A1 (fr) 1994-06-29
AU2495192A (en) 1993-04-05
US5492449A (en) 1996-02-20
JP3288043B2 (ja) 2002-06-04
CA2118799A1 (fr) 1993-03-18
ES2084378T3 (es) 1996-05-01
DE59205780D1 (de) 1996-04-25
DE4130166C1 (fr) 1993-03-11
JPH06510583A (ja) 1994-11-24
AU659489B2 (en) 1995-05-18
CA2118799C (fr) 2001-12-04
DK0603233T3 (da) 1996-08-05
ATE135798T1 (de) 1996-04-15
WO1993005293A1 (fr) 1993-03-18

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