EP0415259B1 - Pompe doseuse - Google Patents

Pompe doseuse Download PDF

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Publication number
EP0415259B1
EP0415259B1 EP90116104A EP90116104A EP0415259B1 EP 0415259 B1 EP0415259 B1 EP 0415259B1 EP 90116104 A EP90116104 A EP 90116104A EP 90116104 A EP90116104 A EP 90116104A EP 0415259 B1 EP0415259 B1 EP 0415259B1
Authority
EP
European Patent Office
Prior art keywords
metering
stroke
space
plunger
sealing head
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
EP90116104A
Other languages
German (de)
English (en)
Other versions
EP0415259A1 (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 AT90116104T priority Critical patent/ATE97195T1/de
Publication of EP0415259A1 publication Critical patent/EP0415259A1/fr
Application granted granted Critical
Publication of EP0415259B1 publication Critical patent/EP0415259B1/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
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type

Definitions

  • the invention relates to a metering pump with a pump cylinder connected on the inlet side with a pre-delivery chamber and on the outlet side with a metering point and a metering piston interacting therewith and a membrane, the pre-delivery chamber can be above or to the side of the pump cylinder, and with a metering agent container via a suction line and a suction valve a return line having a pressure valve can be connected.
  • the pre-delivery chamber is connected to a metering agent container via a suction line having a suction valve and a return line having a pressure valve.
  • the pre-delivery takes place via the suction line and the suction valve to the pre-delivery room.
  • the dosing piston takes the required amount of dosing agent from the pre-delivery chamber. The excess amount of the dosing agent is conveyed back into the dosing agent container via the pressure valve and the return line.
  • the metering piston must emerge from the compression ring in the cylinder chamber so that the compression chamber is vented. When the dosing piston is immersed in the compression ring, it is mechanically worn out very quickly. This causes high replacement costs for a low-value part, such as a compression ring.
  • the object of the invention is therefore to provide a metering pump for metering liquid media, in particular also aggressive and / or outgassing media, in which the metering piston no longer emerges from the compression ring and the pump acts self-priming and self-venting even against pressure.
  • FIGS. 1 to 3 A first exemplary embodiment of the invention is explained with reference to FIGS. 1 to 3, while FIG. 4 represents another exemplary embodiment.
  • FIG. 1 and 2 show the metering pump according to the invention during the metering and suction stroke
  • FIG. 3 shows, on an enlarged scale, a specific position of the pump during the suction stroke.
  • a metering pump 1 is provided with a housing 2, which has a compression space 3 and an overlying cylinder space 4.
  • the compression chamber 3 is connected on the input side to a metering container 7 via a suction valve 5 and a suction line 6.
  • the metering piston 8 is designed as a hollow piston and is guided by means of a piston guide 9, in which a compression ring 10 is located.
  • the top of the hollow piston is designed as a sealing plate 11, wherein the sealing plate 11 can have a sealing bead 12 on its top.
  • the cylinder space 4 is delimited at the top by a stop ring 13, through which the lifting plunger 21 can move freely, i.e. A gap 17 remains between the lifting plunger 21 and the inside diameter of the stop ring 13, through which the dosing agent can pass from the cylinder space 4 into the membrane space 16.
  • the diaphragm space 16 is delimited at the top by the pre-delivery diaphragm 18 and is in contact with the cylinder space 4 as long as the sealing plate 11 does not abut the stop ring 13.
  • the excess pre-conveyed medium is returned via a return valve 19 and a return line 33 into the dosing agent container 7 during the return stroke.
  • the dosing medium When the dosing medium is sucked out of the dosing agent container 7, it is fed into the cylinder chamber 4 via the suction line 6 and the bypass line 15 and the check valve 20 and from there through the suction effect of the pre-delivery membrane 18 through the gap 17 between the inside diameter of the stop ring 13 and the outside diameter of the lifting tappet 21 promoted in the membrane space 16.
  • the return valve 19 is closed during suction.
  • the hollow piston 8 with the sealing plate 11 is pressed by a spring 24 against a seal 22 on the lifting plunger 21 until the sealing plate 11 bears against the stop ring 13 when the plunger 21 moves further.
  • the lifting plunger 21 After completion of the suction stroke during the dosing stroke (see FIG. 1) the lifting plunger 21 is moved in the other direction via the eccentric 24 and the yoke 25 until the lifting plunger 21 lies sealingly on the sealing bead 12 of the sealing plate 11 and thus the through bore 23 of the Hollow piston 8 closes. During the further metering stroke, the peripheral edge 26 of the lifting plunger 21 takes over the power transmission to the hollow piston 8 and the spring 24. This ensures a constant pressure rigidity during the metering stroke. After reaching the sealing plate 11, the lifting plunger 21 presses the hollow piston 8 against the spring up to the lower maximum value set on the stroke adjustment 27.
  • the suction valve 5 is pressed against the sealing seat 28 and closes the suction line 6.
  • the dosing agent in the compression chamber 3 is thereby pressed into the dosing line 32 via the hose valve 31 via the transverse bore 30 in the cylinder 29.
  • the dosing medium sucked in too much via the pre-delivery membrane 18 and any gas bubbles which may be present are simultaneously released via the return valve 19 and the dosing stroke Return line 33 is fed back into the metering container 7.
  • the gas bubbles returned to the metering container 7 rise to the atmosphere after exiting the return line within the metering container and are not sucked in again.
  • the medium is sucked directly into the hollow piston 8 via the suction line 6, the suction valve 5 and the through bore 23.
  • the lifting plunger 21 lifts off the sealing lip 12 of the plate 11.
  • the dosing medium is then conveyed through the hollow piston 8 via the gap 17 into the membrane space 16 via the pre-delivery membrane 18.
  • the compression chamber is completely filled with dosing agent and vented.
  • a bypass line 15 and a check valve 20 are not required.
  • the embodiment is particularly suitable for small metering strokes.

Landscapes

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

Claims (7)

  1. Pompe de dosage comprenant un espace de pré-alimentation du côté d'admission et un cylindre de pompe du côté de débit, qui est raccordé à un point de dosage, ainsi qu'un piston de dosage pour ooopérer avec ledit cylindre de pompe, un diaphragme, et un passage d'admission pour être raccordé à un récipient à des moyens de dosage, lequel passage comprend une soupape d'admission et un passage de retour renfermant une soupape de pression,
    caractérisée en ce que ledit piston de dosage (8) est configuré en forme d'un piston creux ayant une tête d'étanchéité (11) annulaire du côté opposé audit passage de dosage (32), laquelle tête d'étanchéité est pressée, par l'influence d'une force, contre une extremité du poussoir d'élévation (21), en ce que le volume du cylindre (4) est défini par une couronne de butée (13) du côté dudit poussoir d'élévation (21) pour le passage libre dudit poussoir d'élévation (21) en formant une fente (17), en ce que l'extremité du côté de débit dudit volume de cylindre (4) est formée par un guide de piston (9) par lequel ledit piston creux (9) se déplace pendant l'entière course d'admission et de dosage, et en ce que la distance entre le volume de compression (3) et ladite tête d'étanchéité (11), ainsi que la position de ladite couronne de butée (13) dans le volume du cylindre (4) et la grandeur de la course dudit poussoir d'élévation (21) sont si dimensionnés que, dans une deuxième phase de la course d'admission, ladite tête d'étanchéité (11) porte bien, de façon étanche, contre ladite couronne de butée (13) et qu'au bout de la course d'admission et dans une première phase de la course de dosage le medium peut s'écouler du volume du diaphragme (16) par passage traversant (23) dudit piston creux (8) dans ledit volume de compression (3).
  2. Pompe de dosage selon la revendication 1,
    caractérisée en ce que ledit volume de cylindre (4) est raccordé audit récipient à des moyens de dosage (7) par une dérivation (15) comprenant une soupape d'admission (20).
  3. Pompe de dosage selon la revendication 2,
    caractérisée en ce que ledit guide de piston (9) comprend une couronne de compression (10).
  4. Pompe de dosage selon la revendication 1,
    caractérisée en ce que ladite tête d'étanchéité (11) présente un bourrelet d'étanchéité (12) de son côté qui porte contre ledit poussoir d'élévation (21).
  5. Pompe de dosage selon la revendication 1,
    caractérisée en ce que ladite couronne de butée (13) comprend au moins un anneau d'étanchéité (14) de son côté qui porte contre ladite tête d'étanchéité (11).
  6. Pompe de dosage selon la revendication 1,
    caractérisée en ce que ledit poussoir d'élévation (21) comprend un bord périphérique (26) de son côté qui porte contre ladite tête d'étanchéité (11).
  7. Pompe de dosage selon la revendication 1,
    caractérisée en ce que ladite connexion par l'influence d'une force est établie par un ressort (24) qui s'appuie sur ledit guide de piston (9) et sur ladite tête d'étanchéité (11).
EP90116104A 1989-08-28 1990-08-22 Pompe doseuse Expired - Lifetime EP0415259B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90116104T ATE97195T1 (de) 1989-08-28 1990-08-22 Dosierpumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3928411 1989-08-28
DE3928411A DE3928411A1 (de) 1989-08-28 1989-08-28 Dosierpumpe

Publications (2)

Publication Number Publication Date
EP0415259A1 EP0415259A1 (fr) 1991-03-06
EP0415259B1 true EP0415259B1 (fr) 1993-11-10

Family

ID=6388043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90116104A Expired - Lifetime EP0415259B1 (fr) 1989-08-28 1990-08-22 Pompe doseuse

Country Status (5)

Country Link
US (1) US5017105A (fr)
EP (1) EP0415259B1 (fr)
JP (1) JPH03117687A (fr)
AT (1) ATE97195T1 (fr)
DE (2) DE3928411A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4219663C2 (de) * 1992-06-16 1996-01-18 Prominent Dosiertechnik Gmbh Flüssigkeits-Dosierpumpe
US5290159A (en) * 1993-03-04 1994-03-01 Exxon Production Research Company Downhole pump of constant differential hydraulic pressure
US6164924A (en) * 1998-09-01 2000-12-26 Oil-Rite Corporation Piston and drive assembly for use in a pump
CN110194364B (zh) * 2019-05-08 2021-03-02 胡乔生 一种两级计量的分配系统及其控制方法
DE102022115955A1 (de) 2022-06-27 2023-12-28 Prominent Gmbh Dosierpumpe mit Hubeinstellung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4898632A (fr) * 1972-03-27 1973-12-14
DE7733135U1 (de) * 1977-10-27 1978-03-23 Sukatsch, Alexander, 6702 Bad Duerkheim Dosierpumpe
DE2831437C2 (de) * 1978-07-18 1983-12-15 Webasto-Werk W. Baier GmbH & Co, 8035 Gauting Förder- und Dosierpumpe
DE2831625C2 (de) * 1978-07-19 1987-01-29 Lang Apparatebau GmbH, 8227 Siegsdorf Vorrichtung zum Dosieren einer Chemikalienlösung in strömende Frischflüssigkeit
US4278406A (en) * 1979-11-07 1981-07-14 R. W. Beckett Corporation Electromagnetic pump
DE3134940C2 (de) * 1981-09-03 1983-12-15 Grünbeck Wasseraufbereitung GmbH, 8884 Höchstädt Dosierpumpe
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
DE3928411A1 (de) 1991-03-07
US5017105A (en) 1991-05-21
DE3928411C2 (fr) 1993-05-13
ATE97195T1 (de) 1993-11-15
DE59003436D1 (de) 1993-12-16
EP0415259A1 (fr) 1991-03-06
JPH03117687A (ja) 1991-05-20

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