EP0141068B2 - Pompe doseuse à plongeur - Google Patents

Pompe doseuse à plongeur Download PDF

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Publication number
EP0141068B2
EP0141068B2 EP84109239A EP84109239A EP0141068B2 EP 0141068 B2 EP0141068 B2 EP 0141068B2 EP 84109239 A EP84109239 A EP 84109239A EP 84109239 A EP84109239 A EP 84109239A EP 0141068 B2 EP0141068 B2 EP 0141068B2
Authority
EP
European Patent Office
Prior art keywords
piston
metering
pump
wear
subject
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
EP84109239A
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German (de)
English (en)
Other versions
EP0141068A3 (en
EP0141068A2 (fr
EP0141068B1 (fr
Inventor
Walter Eichner
Kay Bödecker
Wolfgang Huber
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
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Application filed by Lang Apparatebau GmbH filed Critical Lang Apparatebau GmbH
Priority to AT84109239T priority Critical patent/ATE48898T1/de
Publication of EP0141068A2 publication Critical patent/EP0141068A2/fr
Publication of EP0141068A3 publication Critical patent/EP0141068A3/de
Application granted granted Critical
Publication of EP0141068B1 publication Critical patent/EP0141068B1/fr
Publication of EP0141068B2 publication Critical patent/EP0141068B2/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

Definitions

  • the invention relates to a plunger metering pump with a metering piston designed as a plunger and a feed cylinder, preferably for metering an additional liquid into the injection point of a main liquid line, in particular a water line, with a replaceable wear part insert which, as a preassembled unit, comprises the metering piston and piston guide elements.
  • the metering pump can, for example, have a mechanical-hydraulic, mechanical-pneumatic or electric drive and is primarily arranged directly inside the metering agent container on its bottom.
  • the medium to be dosed should always be higher than the pump cylinder.
  • An electromagnetic vibrating armature pump with an insert consisting of metering pistons and piston guide elements to be replaced is known, for example, from DE-A-2 555 739.
  • a plunger pump which, although not a metering pump, has a pump cylinder inserted in a pump housing, which together with the sealing elements contained therein for the pump piston and a suction and pressure valve can be replaced. To do this, the pump piston must be removed from the pump drive and pulled out of the pump cylinder.
  • the invention has for its object to improve the plunger metering pump so that when wear occurs, a simple, quick and safe repair of the pump is possible without the need for an additional readjustment of the metered amount. Disassembly and assembly of the pump should, in particular, be carried out in such a way that the position of the metering piston relative to its sealing element is exactly maintained during the exchange.
  • the wear part insert contains a pump body surrounding the delivery cylinder space together with the metering piston immersing therein with its lower end, with a piston centering unit located therein, and a piston guide upper part connected to the piston and to be connected to a piston actuating plunger , and that the latter and the pump body are assigned their relative position correspondingly arranged contact points on the piston actuating plunger or on the pump receptacle.
  • the interchangeable wear part insert which also contains the dosing piston together with the upper part of the piston guide, and the two contact points for the upper part of the piston guide on the piston actuating plunger on the one hand and for the pump body on the pump receptacle on the other hand, the relative position required for metering operation is ensured during assembly. Accordingly, changing the wear part insert as a whole does not require readjustment of the pump described. Furthermore, with the tight manufacturing tolerance of the wear part insert being ensured, the defined position of the piston sealing element relative to the relative position of the metering piston is maintained each time the wear part insert is replaced.
  • the replaceable wear part insert according to the invention can contain, in addition to the aforementioned elements, in particular also a metering check valve protecting the metering line against the pump cylinder, preferably designed as a ring valve with a small dead space, and also a piston sealing element preferably designed as an O-ring.
  • a metering check valve protecting the metering line against the pump cylinder
  • a piston sealing element preferably designed as an O-ring.
  • the contact points on the pump receptacle and on the piston actuating plunger advantageously consist of the relative position of the metering piston and its sealing element with precisely defining contact edges.
  • a latchable connection of the upper piston guide part to the actuating plunger of the piston is also advantageous. As a result, a piston return spring can be dispensed with and the drive force can be reduced by the corresponding spring restoring force.
  • the plunger dosing pump shown in section and designated overall by 1 has a dosing piston 2 designed as a plunger.
  • the medium to be dosed in the upper piston position 3 runs through inlet slots 4 into a cylinder chamber 5.
  • the metering liquid present in the cylinder chamber 5 is expelled into the metering line 10 via the metering check valve 7, which is designed in particular as a ring valve, via the ring chamber 8 of the intermediate ring 9.
  • the individual parts of the metering pump 1 that are primarily exposed to wear are combined in a separate wear part insert 11.
  • the wearing part insert 13 is thus designed as an exchangeable pump module.
  • the module change does not require readjustment or readjustment of the specific metered quantity.
  • This advantage is achieved by a first contact edge 18 assigned to the wear part insert 11 to the lower part of the pump receptacle 19. With the aid of a further contact edge 20 - namely between the upper piston guide part 16 and the piston actuating plunger or lever 21 - the relative position of the metering piston 2 to its sealing element 12 can be ensured particularly reliably .
  • Another advantageous feature of the present metering pump is the snap-in connection of the piston guide upper part 16 and piston actuating plunger 21. With the aid of this connection, the metering piston 2 is carried along during the upward movement in the direction of arrow 22.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (6)

  1. Pompe doseuse (1) à piston plongeur pourvue d'un piston doseur (2) réalisé sous la forme d'un piston plongeur, et d'un cylindre de refoulement, pour doser de préférence l'introduction d'un liquide d'appoint au point d'injection d'une conduite principale pour des liquides, en particulier une conduite d'eau, ainsi que d'une cartouche d'usure (11) remplaçable constituée par une unité montée au préalable et comprenant le piston doseur (2) et les éléments de guidage du piston, caractérisée par le fait que la cartouche d'usure remplaçable (11) renferme, d'une part, un corps de pompe (17) dans lequel est placée une unité (13) de centrage du piston et qui entoure le corps (5) du cylindre de refoulement dans lequel est engagée l'extrémité inférieure du piston doseur (2) et, d'autre part, un élément supérieur (16) de guidage du piston relié à celui-ci ainsi qu'à la tige de commande (21) du piston, et du fait que des emplacements de positionnement (20 et 18 respectivement), situés au niveau de la tige de commande (21) du piston et du logement (19) de la pompe respectivement, sont prévus associés à l'élément supérieur (16) de guidage du piston et au corps de la pompe (17) et sont disposés de manière à correspondre à la position relative de ces derniers.
  2. Pompe selon la revendication 1, caractérisée par le fait que la cartouche d'usure remplaçable (11) renferme un clapet de dosage anti-retour (7) se présentant, de préférence, sous la forme d'un clapet annulaire à faible espace mort.
  3. Pompe selon l'une ou l'autre des revendications 1 ou 2, caractérisée par le fait que la cartouche d'usure remplaçable (11) comprend un élément d'étanchéité du piston (12) se présentant, de préférence, sous la forme d'un joint torique.
  4. Pompe selon l'une quelconque des revendications 1 à 3, caractérisée par le fait que le corps de pompe (17) et ses éléments d'étanchéité (14, 15) faisant partie de la cartouche d'usure remplaçable (11), de même que le clapet de dosage anti-retour (7) sont entourés d'un anneau intermédiaire de protection (9).
  5. Pompe selon l'une quelconque des revendications 1 à 4, caractérisée par le fait que les emplacements de positionnement sont constitués, au niveau du logement (19) de la pompe, ainsi qu'au niveau de la tige de commande (21) du piston, par des bords d'appui (18 et 20 respectivement) définissant exactement la position relative du piston doseur (2) et de son élément d'étanchéité (12).
  6. Pompe selon l'une quelconque des revendications 1 à 5, caractérisée par le fait que l'élément supérieur (16) de guidage du piston faisant partie de la cartouche d'usure remplaçable (11) s'enclenche dans la tige de commande (21) du piston.
EP84109239A 1983-08-11 1984-08-03 Pompe doseuse à plongeur Expired - Lifetime EP0141068B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84109239T ATE48898T1 (de) 1983-08-11 1984-08-03 Tauchkolben-dosierpumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3329006A DE3329006C2 (de) 1983-08-11 1983-08-11 Tauchkolben-Dosierpumpe
DE3329006 1983-08-11

Publications (4)

Publication Number Publication Date
EP0141068A2 EP0141068A2 (fr) 1985-05-15
EP0141068A3 EP0141068A3 (en) 1986-05-14
EP0141068B1 EP0141068B1 (fr) 1989-12-20
EP0141068B2 true EP0141068B2 (fr) 1994-03-16

Family

ID=6206311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84109239A Expired - Lifetime EP0141068B2 (fr) 1983-08-11 1984-08-03 Pompe doseuse à plongeur

Country Status (3)

Country Link
EP (1) EP0141068B2 (fr)
AT (1) ATE48898T1 (fr)
DE (2) DE3329006C2 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE330902C (de) * 1919-11-05 1920-12-23 Carl Schmidt Einfach wirkende Tauchkolbenpumpe mit Einsatzzylinder
US2766701A (en) * 1953-03-09 1956-10-16 Nat Supply Co Plunger and cylinder for pump
FR1074110A (fr) * 1953-10-26 1954-10-01 Pompe perfectionnée
US3223040A (en) * 1962-04-09 1965-12-14 Stewart Warner Corp Two component pumping and proportioning system
AT363782B (de) * 1978-07-19 1981-08-25 Lang Apparatebau Gmbh Vorrichtung zum dosieren einer chemikalienloesung in stroemende frischfluessigkeit
US4242063A (en) * 1979-06-13 1980-12-30 Lear Siegler, Inc. High pressure multi-cylinder pump
DE3134940C2 (de) * 1981-09-03 1983-12-15 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
EP0141068A3 (en) 1986-05-14
DE3480802D1 (de) 1990-01-25
DE3329006A1 (de) 1985-02-28
DE3329006C2 (de) 1993-12-09
ATE48898T1 (de) 1990-01-15
EP0141068A2 (fr) 1985-05-15
EP0141068B1 (fr) 1989-12-20

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