EP0316537B1 - Pompe doseuse - Google Patents

Pompe doseuse Download PDF

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Publication number
EP0316537B1
EP0316537B1 EP88115191A EP88115191A EP0316537B1 EP 0316537 B1 EP0316537 B1 EP 0316537B1 EP 88115191 A EP88115191 A EP 88115191A EP 88115191 A EP88115191 A EP 88115191A EP 0316537 B1 EP0316537 B1 EP 0316537B1
Authority
EP
European Patent Office
Prior art keywords
space
dosing
pump
plunger
defining element
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
EP88115191A
Other languages
German (de)
English (en)
Other versions
EP0316537A1 (fr
Inventor
Franz Röttel
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.)
Gruenbeck Wasseraufbereitung GmbH
Original Assignee
Gruenbeck Wasseraufbereitung 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 Gruenbeck Wasseraufbereitung GmbH filed Critical Gruenbeck Wasseraufbereitung GmbH
Priority to AT88115191T priority Critical patent/ATE65298T1/de
Publication of EP0316537A1 publication Critical patent/EP0316537A1/fr
Application granted granted Critical
Publication of EP0316537B1 publication Critical patent/EP0316537B1/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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • 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
    • 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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports

Definitions

  • the invention relates to a metering pump according to the first part of patent claim 1.
  • Such a metering pump is known from WO-A-8303447.
  • the metering piston creates a connection to a pre-delivery space arranged above it, so that any air that is present can escape into the pre-delivery space.
  • the pre-delivery space is delimited by a membrane which is firmly connected to the metering piston.
  • the excess dosing agent located in the pre-delivery chamber is conveyed back into the dosing agent container via the return line when the dosing piston moves downward.
  • the metering pump should be self-priming and self-venting.
  • the metering pump 1 has a housing 2 with a pump chamber 3 on its underside and an overlying piston chamber 4.
  • the pump chamber 3 can be connected on the input side to a dosing agent container 7 via a schematically indicated suction valve 5 and a suction line 6.
  • a metering piston 8 is guided in the housing 2 so that it emerges from the pump chamber 3 for the return stroke and plunges into the latter in the manner shown in FIG. 2 for the working stroke.
  • a compression O-ring 9 is provided, which surrounds the metering piston 8 in a sealing manner when immersed.
  • At a predetermined distance from the compression O-ring there is an outlet 10 to be connected to a dosing point with a pressure valve 11.
  • a return line 12 is connected via a pressure valve 13.
  • the metering piston 8 is guided so that it can be moved back and forth coaxially to the piston chamber 4.
  • a sealing sleeve 14 is provided around the metering piston 4 and is guided in a sleeve guide 15.
  • a sealing ring 16 is provided between the sleeve guide 15 and the metering piston 8 for sealing.
  • the sealing sleeve is moved by a compression spring 17 into the end position shown in FIG. 2, in which the sleeve guide is moved into an end position predetermined by a stop 18 on the metering piston 8.
  • the compression spring 17 is at one end on the adjacent underside of the sleeve guide 15 and at its other end to an abutment ring 19 which is fixedly connected to the metering piston and is optionally formed in one piece.
  • the piston chamber 4 is sealed from the outside by a sealing ring 20 arranged around the emerging metering piston.
  • the sealing collar 14 together with the collar guide 15 separates the piston chamber 4 into a lower piston chamber 21 which can be connected to the pump chamber 3 and an upper piston chamber 22 which is connected to the return line.
  • dosing agent is drawn into the pump chamber 3 by lifting the dosing piston 8 via the suction line 6.
  • the limiting element which separates the lower and upper piston chambers and consists of a sleeve guide and sealing sleeve, tends to move upward, so that the volume of the lower piston chamber increases.
  • There is a negative pressure in the lower piston chamber which leads to the compression spring 17 being compressed in the manner shown in FIG. 1 until the metering piston 8 emerges from the compression O-ring 9 and thus a connection between the pump chamber 3 and lower piston chamber is created.
  • the prestressed compression spring 17 is released and the limiting element consisting of the sealing sleeve and sleeve guide is accelerated towards the stop 18.
  • the dosing agent with any air bubbles present therein, is torn out of the pump chamber 3 and there is complete ventilation.
  • the excess dosing medium present in the upper piston chamber 22 is returned to the outside with air via the pressure valve 13 and the return line 12 and in particular into the storage container.
  • the dosing piston 8 moves into the pump chamber 3 and the dosing agent which has already been sucked in there becomes conveyed to the dosing point via the pressure valve 11 and the outlet 10.
  • the excess metering agent located in the lower piston chamber 21 is conveyed into the upper piston chamber 22 with air, if necessary, via the sealing sleeve which, although blocking the upper piston chamber to the lower piston chamber, allows medium and air to pass from the lower piston chamber to the upper piston chamber. The cycle described above is then repeated.
  • FIGS clamped membrane 23 is provided instead of the delimiting element consisting of a sealing sleeve and sleeve guide that divides the piston chamber 4 into a lower and an upper piston chamber.
  • the membrane is held on its inner side surrounding the metering piston 8 by an annular holder 24, which is sealed to the outside via a sealing ring 25 between the holder and the outer surface of the metering piston 8.
  • the compression spring 17 is again provided in such a way that the socket 24 bears against the stop 18 in its outermost position shown in FIG. 4.
  • dosing agents and air bubbles located therein are again torn out of the pump chamber 3, and venting takes place.
  • the dosing agent in the pump chamber 3 is conveyed to the dosing point via the outlet 10.
  • the membrane 23 conveys excess dosing agent and air via the pressure valve 13 and the return line 12 to the outside or back into the dosing agent container. The cycle described is then continued.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Reciprocating Pumps (AREA)

Claims (8)

1. Pompe doseuse comprenant une chambre de pompe (3) munie d'un piston doseur (8) pour le transport du produit à doser vers un point de dosage, la chambre de pompe (3) pouvant être raccordée par l'intermédiaire d'une conduite d'aspiration (6) présentant une soupape d'aspiration (5) avec un réservoir de produit à doser (7), une conduite de retour (12), un cylindre (4) situé entre la chambre de pompe (3) et la conduite de retour (12) et un élément de délimitation (14, 15; 23, 24) pour le cylindre, caractérisée en ce que l'élément de délimitation (14, 15; 23, 24) est précontraint de telle sorte que lors du raccordement de la chambre de pompe (3) et du cylindre (4) pendant la course d'aspiration, il fait augmenter brusquement, pour la purge, le volume du cylindre (4) raccordé avec la chambre de pompe (3) par un mouvement de l'élément de délimitation (14, 15; 23, 24) accéléré par rapport au mouvement du piston doseur (8).
2. Pompe doseuse selon la revendication 1, caractérisée en ce que l'élément de délimitation (14, 15) est précontraint au moyen d'un ressort (17) dans la position correspondant au plus grand volume,
3. Pompe doseuse selon l'une des revendications 1 ou 2, caractérisé en ce que l'élément de délimitation divise le cylindre (4) en un cylindre inférieur (21) voisin de la chambre de pompe (3) et un cylindre supérieur (22) raccordé avec la conduite de retour, de telle sorte que du fluide puisse passer du cylindre inférieur dans le cylindre supérieur.
4. Pompe doseuse selon la revendication 3, caractérisée en ce que l'élément de délimitation est un manchon d'étanchéité (14).
5. Pompe doseuse selon l'une des revendications 1 à 4, caractérisée en ce que l'élément de délimitation (14, 15; 23, 24) est monté coulissant sur le piston.
6. Pompe doseuse selon l'une des revendications 1 à 5, caractérisée en ce que l'élément de délimitation est constituée par une membrane (23).
7. Pompe doseuse selon la revendication 6, caractérisée en ce que dans la position de fonctionnement de la pompe doseuse, la chambre de pompe (3) se trouve sur le côté inférieur du cylindre (4) et la membrane (23) est au-dessus de la sortie vers la conduite de retour (12).
8. Pompe doseuse selon l'une des revendications 1 à 7, caractérisée en ce que lors du raccordement entre la chambre de pompe et le cylindre, l'élément de délimitation (14, 15; 23, 24) augmente brusquement le volume du cylindre (4).
EP88115191A 1987-11-13 1988-09-16 Pompe doseuse Expired - Lifetime EP0316537B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88115191T ATE65298T1 (de) 1987-11-13 1988-09-16 Dosierpumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3738656 1987-11-13
DE3738656A DE3738656C1 (de) 1987-11-13 1987-11-13 Dosierpumpe

Publications (2)

Publication Number Publication Date
EP0316537A1 EP0316537A1 (fr) 1989-05-24
EP0316537B1 true EP0316537B1 (fr) 1991-07-17

Family

ID=6340473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115191A Expired - Lifetime EP0316537B1 (fr) 1987-11-13 1988-09-16 Pompe doseuse

Country Status (3)

Country Link
EP (1) EP0316537B1 (fr)
AT (1) ATE65298T1 (fr)
DE (2) DE3738656C1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4127547C2 (de) * 1991-08-22 2001-04-26 Hedrich Vakuumanlagen Wilhelm Vorrichtung und Verfahren zur dosierten und kontrollierten Abgabe von Gießharz
DE9200243U1 (de) * 1992-01-11 1992-03-12 Wolter, Hans, 8941 Sontheim Dosierpumpe für Flüssigkeiten
DE29811215U1 (de) * 1998-06-23 1999-11-04 Heimberg, Wolfgang, Dr., 85560 Ebersberg Pumpenvorrichtung
ITTV20010073A1 (it) * 2001-06-01 2002-12-01 Tecnopro Snc Distributore di quantita' dosate di un additivo liquido in particolare per l'impiego in una macchina lavastoviglie per uso professionale
ITUB20150622A1 (it) * 2015-05-12 2016-11-12 Demak S R L Pompa degasante

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680985A (en) * 1970-12-28 1972-08-01 Mec O Matic The Pump
DE2651614C2 (de) * 1976-11-12 1984-10-04 Lang Apparatebau GmbH, 8227 Siegsdorf Dosierpumpe
FR2379712A1 (fr) * 1977-02-03 1978-09-01 Jules Michel Dispositif d'injection periodique d'un produit liquide ou pateux, en particulier d'un produit de graissage
DE3210821C2 (de) * 1982-03-24 1986-01-09 Grünbeck Wasseraufbereitung GmbH, 8884 Höchstädt Dosierpumpe
DE3300461A1 (de) * 1983-01-08 1984-08-30 Lang Apparatebau GmbH, 8227 Siegsdorf Kolben-membrandosierpumpe

Also Published As

Publication number Publication date
DE3738656C1 (de) 1989-03-23
ATE65298T1 (de) 1991-08-15
DE3863748D1 (de) 1991-08-22
EP0316537A1 (fr) 1989-05-24

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