EP1412639B1 - Pompe doseuse - Google Patents

Pompe doseuse Download PDF

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Publication number
EP1412639B1
EP1412639B1 EP02776914A EP02776914A EP1412639B1 EP 1412639 B1 EP1412639 B1 EP 1412639B1 EP 02776914 A EP02776914 A EP 02776914A EP 02776914 A EP02776914 A EP 02776914A EP 1412639 B1 EP1412639 B1 EP 1412639B1
Authority
EP
European Patent Office
Prior art keywords
metering pump
pistons
valve block
slide
pump according
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
EP02776914A
Other languages
German (de)
English (en)
Other versions
EP1412639A1 (fr
Inventor
Willi Hempelmann
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.)
Micro Mechatronic Technologies AG
Original Assignee
Micro Mechatronic Technologies AG
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 Micro Mechatronic Technologies AG filed Critical Micro Mechatronic Technologies AG
Publication of EP1412639A1 publication Critical patent/EP1412639A1/fr
Application granted granted Critical
Publication of EP1412639B1 publication Critical patent/EP1412639B1/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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • 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 metering pump, in particular a metering pump for small delivery quantities, as defined in the preamble of claims 1 and 2.
  • the invention provides a metering pump is proposed, which has a simple construction on and for dosing, especially for small quantities is versatile.
  • valve block 2 On a base plate 1 of a pump unit 100 (FIG. 5), a valve block 2 is fastened by means of screws 21, which accommodates a correspondingly conically shaped control plug 3 in a conical bore (FIG. 3). As shown in FIG. 1, the valve block 2 is provided on the underside with a suction hole 4 and diametrically opposite on the top with a discharge hole 5, wherein in the region of these holes 4 and 5 grooves 6 and 7 on the circumference are formed of the control block 3, each extending about half the circumference and by webs 8 and 8 'are separated from each other.
  • valve bores 9 and 10 are formed opposite to each other, where cylinder tubes 11 and 11 'are frontally attached, which are held by a holding plate 12 and 12' between this and the valve block 2 clamped ,
  • a piston 13 or 13 ' is guided in each of these cylinder tubes 11 and 11', the piston rod 30 of which is fastened to a slide arm 14 'or 14 "on the rear side of the base plate 1 (FIG Slider 14 out, which connects the two slide arms 14 'and 14 "together.
  • the electric motor 201 drives via a countershaft gear 202, which consists of, for example, two intermeshing gears, a threaded spindle 203, with a nut 204 is engaged, which is connected via a protruding bolt 205 with the slider 14 in conjunction
  • the direction of rotation of the motor 201 is switched over by limit switches 206 and 207 when an actuating element 208 adjustably mounted on the nut 204 comes into contact with the respective limit switches 206 and 207 when the end positions of the pistons 13 and 13 'are reached.
  • projections 16 are formed on the slide 14 at a distance from one another, which are displaceable in a recess 1a of the base plate 1 and to which a respective stop pin 17 or 17 'is adjustably mounted by a thread.
  • These stop pins 17 and 17 ' cooperate with a lever 18 which is eccentrically mounted on the back of the control block 3 such that upon contact of the stop pins 17, the control chick 3 is pivoted about its axis over a predetermined angular range, so when changing from the delivery to the suction stroke of the piston, the control chick 3 is pivoted.
  • the piston 13 In the operating position of Fig. 1, the piston 13 is at the end of the ejection movement, in which the medium contained in the cylinder tube 11 and in the circumferential groove 6 of the control plug 3 medium was ejected through the overhead dispensing bore 5, while the piston 13 ', a suction movement has performed, was sucked through the medium through the lower intake hole 4 in the circumferential groove 7 and in the cylinder tube 11 '.
  • the lever 18 may be attached to the control chick 3, so that the control chick 3 is switched directly by the stop pins 17.
  • a spring-loaded snap device is preferably provided.
  • the lever 18 is formed radially on a pin 42 projecting, which is rotatably mounted in a bore 214 of a housing 220 of the drive unit 200 via a ball bearing (Fig. 3).
  • the lever 18 on the pin 42 is designed as an eccentric, which engages in an approximately V-shaped recess 44 on the back of the control block 3.
  • the recess 44 is indicated, which widens radially outward. Furthermore, as shown in FIG.
  • a radially projecting lever 19 is used on the pin 42 via a polygonal pin 43, on which a spring 20 engages, which is fastened to the housing 220 at the other end (FIG. 3).
  • the tension spring 20 is moved over a dead center position, whereby the spring with snap effect pivots the pin 42 and thus the eccentric lever 18, so that the control chick 3 is accelerated to the intended pivot position is switched.
  • Fig. 4a shows a partial perspective view of the snap device, wherein the eccentric lever 18 rests against one side of the recess 44 and the control chicks 3 holds in the predetermined switching position.
  • the stopper pin 17 on the control chicks projecting section of the eccentric lever 18 comes to rest and this slightly pivoted counterclockwise in Fig. 4a, so the control chicks 3 is not yet moved by lifting the eccentric lever 18 from its position until the spring 20 comes after exceeding the dead center position to the effect and the pin 42nd accelerates further rotates, so that the eccentric lever 18 comes to rest from the position in Fig. 4a on the other side of the recess 44, whereby the control chick is accelerated in the other switching position is switched.
  • the juxtaposed pistons and cylinder tubes can have different diameters, so that there is a three-phase pump that delivers three different delivery volumes.
  • the smallest diameter piston pump having the smallest piston / cylinder diameter can be designed for flow rates of 1 to 1000 ⁇ l / hr, while the middle pump delivers 4 to 4000 ⁇ l / hr with a slightly larger piston / cylinder diameter.
  • the material flows delivered by the individual pumps are in a quantity ratio dependent on the piston diameter.
  • the three streams can be combined with each other via a downstream, not shown, valve device.
  • the streams delivered by the three pumps can also be completely different media.
  • the diameter of the cylinder tubes and piston can be designed the same in the illustrated three pumps. Depending on the intended use, the diameters of cylinder tube and piston in the individual pumps can be adapted to the respective requirements.
  • the Rumpentician 100 with the three individual pumps can be adjusted continuously via an unillustrated control electronics for the motor 201 in the entire volume range, the pump is self-priming and can produce high pressures.
  • the surface of the conical control plug 3 is lapped, so that a tight contact with the correspondingly machined surface of the conical bore in the valve block 2 results, whereby separate sealing elements between the individual pumps or between the individual circumferential grooves can be omitted.
  • the piston diameters are each made larger than the width of the grooves 6 and 7 on the control plug 3, so that the piston 13 can come to rest on the surface of the control plug 3.
  • the front side of the piston is chamfered and convex in accordance with the radius of the control block in the region of the respective cylinder bore.
  • the piston rod 30 is inserted via a projection 31 of smaller diameter in a central bore of the piston. Between the end face of this extension 31 and piston 13, an elastic member 32 is inserted, while the rear end face of the piston 13 has a small clearance relative to the portion of the piston rod 30 with a larger diameter.
  • the piston 13 can thereby be brought to rest on the peripheral surface of the control block 3 in order to keep dead spaces as low as possible without excessive pressure being exerted on the circumferential surface of the control plug by the piston rod 30.
  • the diameter of the cylinder bores 9 and 10 in the valve block 2 corresponds to the inner diameter of the cylinder tubes 11 and 11 ', so that the cylinder bore continues in each case the cylinder space formed by the cylinder bore 9, 10.
  • the cylinder tube 11 is inserted into a receiving bore 22 of the valve block 2, wherein a sealing ring 34 between the end face of the cylinder tube 11 and paragraph between the cylinder bore 9 and receiving bore 22 is provided.
  • a clamping element 35 (FIG. 3) surrounding the piston rod 30 with external thread is screwed into a threaded bore in the retaining plate 12. This clamping element 35 is located above a another sealing ring 36 on the outer end face of the cylinder tube 11 and holds this between the two sealing rings 34 and 36 clamped.
  • the outer end of the piston rod 30 is fixed via a locking screw 37 in a bore of the slide arm 14 'or 14 ", so that a fine adjustment of the piston position can be made relative to the control chick 3.
  • the power train between the drive motor 201 and the piston 13 of the pumps is designed without play.
  • the motor 201 drives the zero-clearance countershaft gear 202, through which the threaded spindle 203 mounted in bearings 209 and 209 'is turned backlash-free in the two directions of rotation when the rotational movement of the motor is switched over.
  • the nut 204 is slotted and provided with a clamping element, such as a screw, which is indicated at 210, so that the engagement of the nut 204 can be adjusted without play with the threaded spindle 203.
  • a flange 240 is mounted, which has a recess in which an eccentric ring 241 is mounted with the outer circumference.
  • a further flange 242 is mounted, which is fastened by screws to a stationary element 243 of the housing 220.
  • the threaded spindle 203 is engaged with a threaded ring 245, which is rotatably mounted in the bearing 209.
  • the threaded spindle is located on a shoulder on the bearing 209 '.
  • the threaded spindle can be kept clamped on the bearing 209 ', so that the bearing of the threaded spindle is free of play.
  • the spring element 211 between pin 205 and bore circumference may be, for example, a spring ring corrugated along the circumference.
  • FIG. 6 The schematically illustrated in Fig. 6 structure of the drive train between the motor 201 and bolt 205 is housed in the housing 220 of the drive unit 200, wherein the bolt 205 protrudes from the front of the housing 220 in a slot 213, as shown in FIG. In the housing 220 and the drive electronics, not shown, for the control of the motor 201 is housed.
  • a bearing ball 216 (FIG. 5) is arranged in a bore, which is spring-loaded and concentrically abuts the back of the control block 3 during assembly of the drive unit and pump unit 100 in order to provide the control chick with a predetermined contact force to hold the conical bore of the valve block in the axial direction.
  • the bearing ball 216 acting spring 217 can be changed by an adjusting device, not shown in their contact force so that the bearing ball 216 rests with a predetermined contact pressure on the flat rear side of the control block.
  • clamping elements 230 in the form of pivotable hooks on the opposite sides are attached to the housing 220 and cooperate with pins 40 projecting laterally from the base plate 1 of the pump unit 100.
  • pins 40 projecting laterally from the base plate 1 of the pump unit 100.
  • the hook-shaped clamping elements 230 can also be replaced by a single clamping bracket, which connects the drive unit 200 to the pump unit 100.
  • the pump unit 100 can be quickly released from the drive unit 200, so that the pump unit z. B. can be sterilized in an autoclave at higher temperatures.
  • the pump unit can be dismantled in a short time, with all media-carrying components such as pistons, cylinder tubes and control chicks are freely accessible for cleaning purposes.
  • the pump unit 100 can be coupled quickly to the drive unit 200 via the clamping elements 230, wherein the pin 205 engages in the bore 43 on the slider 14 and the eccentric 43 in the recess 44 on the back of the control block 3. This engagement is performed by engaging in the mating holes 41 of the base plate 1 dowel pins 231.
  • the metering pump By conditioning the piston 13 on the peripheral surface of the control block 3, the metering pump is constructed so that there are no possible dead spaces. If air is to be sucked in through the lower intake bores 4, it will rise with the delivery flow upwards to the delivery bores 5, whereby possibly present air bubbles will be accelerated to the discharge bores by the pivoting movement of the control plug 3 during the switchover from delivery to intake stroke.
  • control chick 3 is switched as soon as the pistons 13 have reached their final stroke, so that the drive direction of the slide 14 and the control chick 3 are changed over substantially simultaneously.
  • the limit switch By separating the reversal of the motor by the limit switch on the one hand and the reversal of the plug by the stop pins 17 on the other hand, it is also possible to adjust by adjusting the limit switches 206 and 207, the drive direction of the slider 14, without at the same time the control chicks 3 is switched.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Vending Machines For Individual Products (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Peptides Or Proteins (AREA)

Claims (10)

  1. Une pompe dosage comprenante des pistons (13, 13') opposés guidés dans des cylindres (11, 11') et reliés l'un avec l'autre par un curseur (14) brimbalé par un moteur d'entrâinement (201), un mécanisme de déplacement étant prévu dans un bloc clapet (2) entre les pistons (13, 13') et reliant à tour de rôle les espaces des cylindres avec une aperture aspirante (4) et une aperture de sortie (5).
  2. Une pompe dosage comprenante
    deux groupes des pistons (13, 13') guidés dans des cylindres (11, 11'),
    un curseur (14) relié à les deux groupes des pistons brimbalé par un moteur d'entrâinement (201) et brimbalant les groupes des pistons, et
    un mécanisme de déplacement prévu entre les deux groupes des pistons reliant à tour de rôle les espaces des cylindres avec une aperture aspirante (4) et une aperture de sortie (5),
    le mécanisme de déplacement étant actionné par le curseur (14).
  3. Une pompe dosage selon la revendication 1 ou 2, dans laquelle le mécanisme de déplacement est formé comme un robinet d'arrêt rotatif prévu dans le bloc clapet (2) et équipé sur le périmètre même de rainures (6, 7) séparées l'un de l'autre par des traverses, et
    dans laquelle l'une rainure (6) est reliée avec un alésage (9) du cylindre dans le bloc clapet (2) et l'autre rainure (7) est reliée avec un alésage (10) du cylindre dans le bloc clapet opposé, et au moyen du mouvement avant arrière du robinet d'arrêt (3), l'une rainure est reliée avec l'aperture aspirante (4) formée dans le bloc clapet, pendant l'autre rainure est reliée avec l'aperture de sortie (5) formée dans le bloc clapet, et vice versa.
  4. Une pompe dosage selon la revendication 2, dans laquelle des arrêts (17, 17') prévus au curseur (14) pressurisent un levier (18) monté au robinet d'arrêt dans l'étendue des positions finales des pistons, pour déplacer le robinet d'arrêt.
  5. Une pompe dosage selon la revendication 2, dans laquelle un dispositif mousqueton (19, 20) est formé, par laquelle le robinet d'arrêt (3) est pivoté de manière accélérée quand un arrêt (17) bute au levier (18).
  6. Une pompe dosage selon les revendications précédentes, dans laquelle une pluralité de tubes des cylindres (11, 11') juxtaposés est prévue au bloc clapet (2) et une pluralité correspondante de pistons (13, 13') est prévue au curseur (14).
  7. Une pompe dosage selon les revendications précédentes, dans laquelle le bloc clapet (2) avec les tubes des cylindres (11) et le curseur (14) est monté à une plaque de base (1) pour former une unité de pompe (100) relâchablement reliée avec une unité d'èntrâinement.
  8. Une pompe dosage selon la revendication 7, dans laquelle des goupilles d'ajustage (231) dépassent de l'unité d'entrâinment (200) et s'enclenchent avec des trous alignés (41) à la plaque de base (1) de l'unité de pompe (100).
  9. Une pompe dosage selon la revendication 8, dans laquelle du moins un élément de tension (230) est monté à l'unité d'entrâinement et coopère avec un élément d'enclenchement (40) à la plaque de base (1).
  10. Une pompe dosage selon la revendication 7, dans laquelle un goujon (205) saillit de l'unité d'entrâinement (200), ledit goujon dépasse d'un écrou qui s'enclenche avec un tourillon fileté (203), et ledit goujon s'enclenche avec un trou (43) du curseur (14) à l'unité de pompe (100).
EP02776914A 2001-07-20 2002-07-19 Pompe doseuse Expired - Lifetime EP1412639B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10135495A DE10135495A1 (de) 2001-07-20 2001-07-20 Dosierpumpe
DE10135495 2001-07-20
PCT/EP2002/008084 WO2003010435A1 (fr) 2001-07-20 2002-07-19 Pompe doseuse

Publications (2)

Publication Number Publication Date
EP1412639A1 EP1412639A1 (fr) 2004-04-28
EP1412639B1 true EP1412639B1 (fr) 2007-03-07

Family

ID=7692566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02776914A Expired - Lifetime EP1412639B1 (fr) 2001-07-20 2002-07-19 Pompe doseuse

Country Status (5)

Country Link
US (1) US20040161349A1 (fr)
EP (1) EP1412639B1 (fr)
AT (1) ATE356292T1 (fr)
DE (2) DE10135495A1 (fr)
WO (1) WO2003010435A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10360806A1 (de) * 2003-12-23 2005-07-28 Micro Mechatronic Technologies Ag Dosierpumpe

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1598311A (en) * 1919-12-02 1926-08-31 Boyts Porter & Co Steam chest for pumps
US4184817A (en) * 1977-12-01 1980-01-22 Lear Siegler, Inc. High pressure multi-cylinder pump
DE3105649A1 (de) * 1981-02-17 1982-09-30 Hartmann & Lämmle GmbH & Co KG, 7255 Rutesheim Dosierpumpe
SE466765B (sv) * 1989-04-18 1992-03-30 Pharmacia Biosensor Ab Pump- och doseringsanordning
GB9027859D0 (en) * 1990-12-21 1991-02-13 Cmb Foodcan Plc Metering apparatus
JPH074487A (ja) * 1993-06-17 1995-01-10 Ouken Seiko Kk クランク駆動機構
US5626465A (en) * 1993-12-15 1997-05-06 Unipat Ag Hydraulic piston machines
DE9420962U1 (de) * 1994-12-31 1995-02-23 Klotz, Markus, 75242 Neuhausen Doppelkolbenpumpe
DE19511758A1 (de) * 1995-03-30 1996-10-02 Klaus Obermann Gmbh Dosier- und Injektionspumpenanordnung

Also Published As

Publication number Publication date
WO2003010435A1 (fr) 2003-02-06
DE50209667D1 (de) 2007-04-19
ATE356292T1 (de) 2007-03-15
DE10135495A1 (de) 2003-02-06
EP1412639A1 (fr) 2004-04-28
US20040161349A1 (en) 2004-08-19

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