EP0758053B1 - Pompe doseuse encapsulée - Google Patents

Pompe doseuse encapsulée Download PDF

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Publication number
EP0758053B1
EP0758053B1 EP96112488A EP96112488A EP0758053B1 EP 0758053 B1 EP0758053 B1 EP 0758053B1 EP 96112488 A EP96112488 A EP 96112488A EP 96112488 A EP96112488 A EP 96112488A EP 0758053 B1 EP0758053 B1 EP 0758053B1
Authority
EP
European Patent Office
Prior art keywords
enclosure
diaphragm
dosing pump
pump according
capsule
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
EP96112488A
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German (de)
English (en)
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EP0758053A1 (fr
Inventor
Gerhard Habla
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Habla Gerhard
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Individual
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Publication of EP0758053A1 publication Critical patent/EP0758053A1/fr
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Publication of EP0758053B1 publication Critical patent/EP0758053B1/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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F04B43/0063—Special features particularities of the flexible members bell-shaped flexible members
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive

Definitions

  • the invention relates to a capsule pump in which the pump chamber is designed as a capsule, on the one hand by a rigid wall and on the other hand from a movable wall is limited in the form of a capsule membrane.
  • the fixed Capsule wall In the fixed Capsule wall are formed an inlet and an outlet.
  • the Inlet is an outlet check valve and the outlet is an Outlet check valve assigned.
  • the capsule is with one Actuating plunger connected and between a limit position with minimum capsule volume and a limit position with maximum Capsule volume movable.
  • a capsule pump of this type is from U.S. Patent 3,672 791 known.
  • the capsule membrane comprises only a flatly curved one Ball segment with a relatively small deflection range and low funding volume.
  • the one connected to the capsule membrane Actuating plunger has a pneumatically actuated Piston connected and drives the capsule membrane only the return stroke movement in the corresponding to the maximum capsule volume Extreme position on while driving the capsule membrane during the pre-stroke movement into the minimum capsule volume corresponding extreme position through direct pneumatic Actuation of the capsule membrane back takes place, whereby another biasing spring the capsule membrane movement during the forward stroke supports, but mainly serves the capsule membrane hold in the front position when the pump is not in operation.
  • the invention has for its object one as a metering pump trained capsule pump to create the large capsule volume a defined volume of liquid per stroke of Encapsulates capsule membrane, that is, one that is as precisely defined as possible Maximum and minimum volume in the corresponding extreme positions the capsule membrane has.
  • the invention begins with the knowledge that the problem case not the defective one with a conventional capsule pump Reproducibility of the maximum capsule volume, but the poor reproducibility of the minimum capsule volume represents. Because, sufficiently precise movement strokes or Extreme positions of the plunger actuating the capsule membrane provided that what is not a problem is due to the Dimensioning and the bending behavior of the capsule membrane in their extreme position corresponding to the maximum capsule volume a sufficiently reproducible maximum Capsule volume easily reached, while with bulging Capsule membrane, i.e. in the minimum capsule volume Extreme position, one that is sufficiently precise practically impossible to achieve reproductive capsule membrane shape lets what but with the usual, serving the promotional purpose only Capsule pumps doesn't matter.
  • the solution to the problem according to the invention is that Minimum volume of the pump capsule approximately to the value zero is reduced by the fixed capsule wall with a for bulging the capsule membrane in the foremost position complementary shape is formed and ensured that the capsule membrane is in the foremost position essentially all over the complementary shaped fixed capsule wall, so there is none in between can form uncontrolled liquid pockets.
  • FIGS. 1 to 4 a metering pump designed as a capsule pump from a front end flange 1 (left in Fig. 1), one rear flange 2 (right in Fig. 1), one in between axially extending cylindrical tube wall 3, which is opposite to the front End flange 1 sealed by means of a seal 4 and four outside the tube wall 3 between the flanges 1 and 2 extending tie rods 5 with washers 6 and Nuts 7.
  • the movable capsule wall is formed by a capsule membrane 13, the one with its rear end between conical peripheral region of the rear flange 2 and one put on the outer, in axial section, as shown, wedge-shaped clamping ring 14 is clamped. On the Clamping ring 14 is also the tube wall 3 with the rear Flange 2 connected.
  • the capsule membrane 13 also has a cylindrical, on the Pipe wall 3 interior section and a front work area on, in the front position shown complementary to the concave wall of the base 8 rests and in the rearmost position, as dashed is drawn, bent back.
  • the middle part of the working area of the capsule membrane 13 is between a front molded body 15 and a rear Shaped body 16 clamped on an actuating plunger 17th attached, by means of fasteners 18 and 19th
  • the rear flange 2 of the metering pump represents a middle flange represents, because it includes (on the right in Fig. 1) Pneumatic cylinder with a cylinder wall 20 between the flange 2 and a cylindrical end flange 21, the arrangement being held together by tie rods 22 becomes.
  • the cylinder is a pneumatic cylinder with a and movable double-acting piston 23, connected to the rear end of the operating plunger 17 and drives it.
  • a compressed air connection 21a in the cylinder face flange 21 Via a compressed air connection 21a in the cylinder face flange 21 the right side of the piston 23 in FIG. 1 can be acted upon, around the actuating plunger 17 and thus the capsule membrane 13 to move to the foremost position, and over a compressed air connection 24 in the flange 2 and one itself subsequent axial bore is the left side in Fig. 1 of the Piston 23 can be pressurized to the actuating plunger 17th and to move the capsule membrane 13 to the rearmost position.
  • An axial bore extends within the actuating plunger 17 25, which has a radial outlet bore 26 with the space is connected behind the capsule membrane 13, and the at the rear end of the plunger with a ball check valve 27 Housing components 28 and 29 in that part of the cylinder space opens, the pressurization of the piston 23 with the actuating plunger and the capsule membrane 13 in the foremost Position.
  • the ball check valve 27 is as shown, oriented so that when pressurized of the piston 23 on the right side in FIG. 1, that is to say in the direction of forward movement, the ball check valve 27 opens and air through the axial tappet bore 25 and the radial Outlet bore 26 into the space behind the capsule membrane 13 can emerge, which, like the one on the right or in FIG. rear side of the piston 23 is pressurized.
  • the Capsule membrane 13 is therefore full on the bottom piece 8 pressed so that between the bottom piece and the Capsule membrane there are no remaining fluid pockets can train during the push stroke.
  • the outlet side of the ball check valve 31 also via an axial bore 33 connected to the compressed air connection 24 formed in the flange 2, and a displaceable control piston sits in the bore 33 34.
  • the ball check valve 30 is in the closing direction biased so that when the No compressed air can escape in the space behind the capsule membrane 13 can.
  • the control piston 34 in the bore 33 is like this trained that he when the compressed air connection is pressurized 24 in the flange 2 on the right in Fig. 1 with Compressed air is applied, thereby shifting to the left and with its front end the valve ball of the Ball check valve 30 against the spring preload in Open position presses. So it is an unlockable Ball check valve, and the function of the arrangement is as follows:
  • the outlet channel 32 serves to vent the space behind the capsule membrane 13.
  • the pressurization of the room behind the capsule membrane 13 during the forward stroke and the lowering of the pressure caused by the outlet channel 32 during the reverse stroke also a constant flushing of the room behind the Capsule membrane, so that any occurring during operation low leakage does not remain in the pump and even if it is aggressive substances, the pump mechanism cannot attack or impair.
  • Fig. 5 shows in axial section a modified embodiment a metering pump designed as a capsule pump, the compared to that described above with reference to Figures 1 to 4 Embodiment still further significant improvements has, which are described in more detail below become.
  • FIG. 5 a front End flange 1, a rear flange 2, one in between running cylindrical tube wall 3, seals 4, tie rods 5 with washers 6 and nuts 7, a base piece 8 and this fastening screws 9 and seals 10, one in front end flange 1 formed inlet 11 and an outlet (not visible here), a capsule membrane 13 and one this clamping wedge-shaped clamping ring 14.
  • the capsule pump according to FIG. 5 also closes as in the previously described embodiment on the rear Flange 2 is a pneumatic cylinder with a cylinder wall 20 and a rear cylinder end flange 21, in which a double-acting piston 23 is arranged, the via an actuating plunger 17 with the front part of the Capsule membrane 13 is connected.
  • the actuating plunger 17 is fixed to the piston 23 by means of a nut 17a.
  • a pressurized air port 21a the piston 23 formed for the forward stroke; the compressed air connection to act on the other piston side for the reverse stroke is because not lying in the drawing plane, not shown.
  • FIG. 5 is now intended to provide some modification options that described with reference to FIGS. 1 to 4 basic embodiment and in particular two essential show further improvements.
  • the first major improvement is training of the bottom piece 8.
  • This is according to the embodiment Fig. 1 designed as a solid ring body, the central opening is large enough to support the structure (15, 16) of the front end part of the capsule membrane 13 to record.
  • the bottom piece 8 is in the embodiment 5 with a wreath-like arrangement of channels 8a equipped, which in the space connected to the inlet 11 the central opening of the annular base piece 8 with the radially outer transition area between that of the capsule membrane 13 facing bottom piece face and the inner wall connect the cylindrical tube wall 3.
  • the second of the arrangement shown in FIG. 5 is essential Improvement refers to the formation of the capsule membrane 13.
  • the capsule membrane is punched at its front end to between the moldings 15 and 16 from the front end of the operating plunger 17th
  • the front part of the capsule membrane so to speak the bottom area of that formed by the capsule membrane Cup, continuously closed and without any opening, which of course is a special type of fastening on the front end of the plunger, which is still described becomes.
  • This completely closed training of Capsule membrane 13 ensures absolutely 100% sealing of the space in front of the capsule membrane and the space behind the capsule membrane.
  • the bead is formed front middle part 13a of the capsule membrane on a knob-like front support structure of the mounting plunger 17 fixed.
  • knob-like holding structure from a bead ring 41 made of malleable, for example rubber-like plastic, a mushroom-shaped Retaining cap 42, which by means of a screw 43 on the front End part of the actuating plunger 13 is screwed on, and an annular counter-holder disc 44 with a concave curvature front face.
  • a ring 46 Outside on the bead wedge 13a of the capsule membrane 13 sits a ring 46, the inner diameter of which is smaller than the largest outer diameter of the bead ring 41 and the Counterholder ring 44 are.
  • the assembly takes place as follows:
  • the Actuating plunger 17 On the externally threaded front end of the Actuating plunger 17 is first in the drawing screwed behind the retaining ring 44 nut 45 and turned to the rearmost position, then the Counter-holding ring 44 is put on, then ring 46 is put on, and finally the bead ring 41 with the retaining cap 42 screwed onto the front end of the actuating plunger 17. Now the capsule membrane 13 is placed in which she has with her rear edge ahead between the bead ring 41 and the ring 46 and the counter-holder disc 44 (the is located at an axial distance from the bead ring 41). Then the nut 45 is tightened, i.e. she turns on the thread of the front actuation plunger end in front and clamps the counter-holder ring 44 against the bead ring 41. As a result, the knob-like holding structure the bead 13a of the capsule membrane 13 firmly clamped.
  • an adjusting device 48 attached with an adjusting screw 49, with which the suction stroke and thus the respective dosing volume is adjustable.
  • the front end of the adjustment screw 49 serves as a limit stop for the rear end of the operating plunger 17.
  • the actuating plunger 17 instead of a double-acting Compressed air pistons also via another drive element, for example hydraulic or electric motor or to drive mechanically in any other way.
  • the compressed air supply or discharge then takes place in FIG. 5 illustrated way in synchronism with the lifting movements.
  • two or more such pumps in parallel switch and synchronously in phase or out of phase operate, namely as pure metering pumps or as metering feed pumps.
  • a combination of two or more dosing pumps same or different dosing volume from different suction lines Suck medium and into a common delivery line to promote.
  • a dosing pump or Metering feed pump according to the invention which instead of with a Inlet is provided with two or more inlets, two or more different supply lines either simultaneously or suck in with a time delay and when ejecting into a common exhaust line to mix the sucked media.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Closures For Containers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Claims (14)

  1. Pompe doseuse encapsulée présentant les caractéristiques suivantes :
    a) l'encapsulage de la pompe est délimité par une paroi d'encapsulage rigide (1, 8) comportant une entrée (11) et une sortie (12) y intégrées et une paroi d'encapsulage mobile dans la forme d'un diaphragme d'encapsulage (13),
    b) la paroi d'encapsulage rigide est formée par une bride de front avant (1) du boítier de pompe et d'une paroi tubulaire (3) du boítier de pompe adjacente,
    c) le diaphragme d'encapsulage (13) présente une zone de travail avant et une partie arrière cylindrique adjacente à la paroi tubulaire (3) du boítier de pompe,
    d) le diaphragme d'encapsulage est raccordé au milieu de sa zone de travail avant à un moyen d'actionnement (17) pour le mouvement périodique en va-et-vient entre une position bombée en avant correspondant à un volume d'encapsulage minimal et une position rétractée correspondant à un volume d'encapsulage maximal,
    e) le moyen d'actionnement (17) sert tant à la commande du diaphragme d'encapsulage, tant vers l'avant dans la positon bombée en avant qu'à la commande du diaphragme d'encapsulage en arrière dans la position rétractée,
    f) la paroi d'encapsulage rigide présente une surface de paroi bombée concave complémentaire au contour du diaphragme d'encapsulage (13) dans sa position bombée en avant, à laquelle dans la position bombée en avant le diaphragme d'encapsulage s'appose substantiellement sur toute la surface, et
    g) un dispositif pneumatique provoque à chaque course du diaphragme d'encapsulage dans la position bombée en avant une pressurisation de l'espace à l'arrière du diaphragme d'encapsulage (13) et une décompression de cet espace à chaque course du diaphragme d'encaspulage dans la position rétractée.
  2. Pompe doseuse selon la revendication 1, caractérisée en ce que la surface de paroi bombée de manière complémentaire de la paroi d'encapsulage rigide est formée sur une pièce de fond (8) de forme correspondante, qui est fixée à la bride de front du boítier (1) du côté intérieur.
  3. Pompe doseuse selon les revendications 1 ou 2, caractérisée en ce que la paroi d'encapsulage rigide (1, 8) ou la pièce de fond (8) est formée en comportant des canaux de guidage (8a) s'étendant à partir de la zone médiane vers la zone radiale extérieure du diaphragme d'encapsulage (13).
  4. Pompe doseuse selon l'une quelconque des revendications 1 à 3, caractérisée en ce que l'espace à l'arrière du diaphragme d'encapsulage (13) est délimité par une bride de boítier arrière (2), à laquelle le diaphragme d'encapsulage (13) est fixé par son extrémité arrière et qui est traversée par le moyen d'actionnement (17).
  5. Pompe doseuse selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le moyen d'actionnement du diaphragme d'encapsulage (13) est un poussoir (17) actionné pneumatiquement ou par un moteur.
  6. Pompe doseuse selon la revendication 4, caractérisée en ce que sur la bride de boítier arrière (2) un cylindre pneumatique (20), comportant à l'intérieur un piston pneumatique (23) à double action pouvant être déplacé, est monté, qui est raccordé à l'extrémité arrière du poussoir (17).
  7. Pompe doseuse selon les revendications 5 ou 6, caractérisée en ce que le poussoir (17) présente un alésage axial (25) qui est en liaison avec l'espace à l'arrière du diaphragme d'encapsulage (13) et qui sert à pressuriser cet espace, l'extrémité arrière de l'alésage du poussoir (25) débouchant dans l'espace du cylindre pneumatique servant à mouvoir le poussoir (17) pneumatiquement en avant dans la position bombée en avant du diaphragme d'encapsulage et qu'une soupape de retenue précontrainte en direction de la fermeture est associée à l'alésage du poussoir.
  8. Pompe doseuse selon l'une quelconque des revendications 3 à 7, caractérisée en ce que la bride de boítier arrière (2) présente un canal de sortie (32) comportant une soupape de retenue (30) précontrainte en direction de la fermeture pour décomprimer l'espace à l'arrière du diaphragme d'encapuslage (13), et que le piston de commande (34) est raccordé à l'espace du cylindre pneumatique, ou à son amenée de gaz sous pression, provoquant la pressurisation pour ramener le poussoir (17) dans la position de diaphragme rétractée, lequel piston de commande étant également actionné pneumatiquement.
  9. Pompe doseuse selon l'une quelconque des revendications 1 à 8, caractérisée en ce que la partie d'extrémité avant du moyen d'actionnement (17) sort d'une ouverture médiane du diaphragme d'encapsulage (13) et que la zone médiane du diaphragme d'encapsulage entourant l'ouverture est serrée entre deux pièces moulées (15, 16) fixées à l'extrémité avant du moyen d'actionnement (17).
  10. Pompe doseuse selon l'une quelconque des revendications 1 à 8, caractérisée en ce que le diaphragme d'encapsulage (13) présente une partie médiane (13a) à la manière d'un bourrelet, qui est maintenue moyennant un anneau (46) à un dispositif de maintien en pommeau (41, 42, 44) à l'extrémité avant du moyen d'actionnement (17).
  11. Pompe doseuse selon la revendication 10, caractérisé en ce que le dispositif de maintien en pommeau consiste en deux parties annulaires (41, 44) axialement serrées ensemble, qui présentent un diamètre axial en amont et en aval dudit anneau (46) qui est supérieur au diamètre intérieur de l'anneau (46).
  12. Pompe doseuse selon la revendication 4, caractérisée en ce que dans la bride du boítier arrière (2) au moins un raccordement de conduite (50) est formé qui est raccordé à l'espace à l'arrière du diaphragme d'encapsulage (13) pour la pressurisatoin ou la décompression de cet espace.
  13. Pompe doseuse selon la revendication 5, caractérisée en ce que la course de retour du poussoir (17) peut être réglée par une butée de délimitation (49) réglable.
  14. Pompe doseuse selon les revendications 8 ou 12, caractérisée en ce qu'un appareil de contrôle de fuites est raccordé au canal de sortie (32) ou au raccordement de conduite (50).
EP96112488A 1995-08-07 1996-08-02 Pompe doseuse encapsulée Expired - Lifetime EP0758053B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29512694U 1995-08-07
DE29512694U DE29512694U1 (de) 1995-08-07 1995-08-07 Als Kapselpumpe ausgebildete Dosierpumpe

Publications (2)

Publication Number Publication Date
EP0758053A1 EP0758053A1 (fr) 1997-02-12
EP0758053B1 true EP0758053B1 (fr) 1999-10-06

Family

ID=8011484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96112488A Expired - Lifetime EP0758053B1 (fr) 1995-08-07 1996-08-02 Pompe doseuse encapsulée

Country Status (4)

Country Link
US (1) US5782617A (fr)
EP (1) EP0758053B1 (fr)
AT (1) ATE185402T1 (fr)
DE (3) DE29512694U1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2780451B1 (fr) 1998-06-29 2002-02-08 Imaje Sa Pompe a membrane
US7097569B2 (en) * 2000-05-18 2006-08-29 Brobeck William I Restorable sand or pellet pile device
US6568926B1 (en) * 2001-10-31 2003-05-27 The Gorman-Rupp Company Fluid metering pump
WO2005001285A2 (fr) * 2003-06-26 2005-01-06 The Gorman-Rupp Company Pompe a membrane
WO2006122268A2 (fr) * 2005-05-10 2006-11-16 Pendotech Pompe a membrane sanitaire pour applications dans des processus biologiques critiques

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1767453A1 (de) * 1968-05-11 1971-09-16 Petrocarb Inc Verfahren und Vorrichtung zur pneumatischen Injektion fester Teilchen in eine Hochdruckzone
US3544239A (en) * 1968-11-25 1970-12-01 George C Graham Vacuum operated compound double-acting piston pump or compressor
US3672791A (en) * 1970-07-17 1972-06-27 Ladish Co Pumping system with controlled liquid addition
US3781141A (en) * 1971-07-12 1973-12-25 Dorr Oliver Inc Air pressure actuated single-acting diaphragm pump
DE2939765A1 (de) * 1979-10-01 1981-04-16 Erich 7990 Friedrichshafen Roser Druckluftmotor
IT1251398B (it) * 1991-09-06 1995-05-09 Nuovopignone Ind Meccaniche Ef Pompa a membrana perfezionata, particolarmente adatta per fluidi contenenti gas.

Also Published As

Publication number Publication date
DE29512694U1 (de) 1995-10-19
ATE185402T1 (de) 1999-10-15
US5782617A (en) 1998-07-21
EP0758053A1 (fr) 1997-02-12
DE29612987U1 (de) 1996-10-10
DE59603272D1 (de) 1999-11-11

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