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EP0427988B1 - Pompe à membrane - Google Patents

Pompe à membrane Download PDF

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Publication number
EP0427988B1
EP0427988B1 EP90120510A EP90120510A EP0427988B1 EP 0427988 B1 EP0427988 B1 EP 0427988B1 EP 90120510 A EP90120510 A EP 90120510A EP 90120510 A EP90120510 A EP 90120510A EP 0427988 B1 EP0427988 B1 EP 0427988B1
Authority
EP
European Patent Office
Prior art keywords
valve
diaphragm pump
inlet
pump according
pump
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
EP90120510A
Other languages
German (de)
English (en)
Other versions
EP0427988A1 (fr
Inventor
Harald Dr. Dipl.-Biol. Schnepple
Gert Semler
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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 Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Priority to AT90120510T priority Critical patent/ATE84122T1/de
Publication of EP0427988A1 publication Critical patent/EP0427988A1/fr
Application granted granted Critical
Publication of EP0427988B1 publication Critical patent/EP0427988B1/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
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • 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
    • 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
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1097—Valves; Arrangement of valves with means for lifting the closure member for pump cleaning purposes

Definitions

  • the invention relates to a diaphragm pump, in particular for plants in biological process technology, food technology and medical technology.
  • a disadvantage of the previously described meterable feed devices for correction agents has been their comparatively low delivery accuracy, which also has a negative effect on the implementation which affects biological processes and which can only be compensated for by a comparatively complex, additionally carried out volume flow measurement.
  • connection line between the reaction container and the template container for the correction agent which is connected downstream of the dosing device, is usually sterilized in such a way that the steam is fed into the connection line at the uppermost point of the line, in the vicinity of the reaction container, and the latter then flows through against the conveying direction of the correction medium following the natural gradient, the condensate formed being discharged at the lowest point of the arrangement.
  • the delivery direction is predetermined in diaphragm pumps of the generic type due to self-closing inlet and outlet valves, the condensate drain would be blocked during the sterilization process and such a successful sterilization of the arrangement would be impossible if such a pump were used.
  • the object of the invention is therefore to design a diaphragm pump of the generic type in such a way that it can be completely sterilized by a sterilization process in which the superheated steam used for this process flows through the pump in the opposite direction to the delivery direction for the medium to be metered.
  • FIG. 1 shows a reaction container 1 for carrying out biotechnological processes, to which a liquid correction agent located in a storage container 3 can be added via a connecting line 2.
  • the correction agent is conveyed and metered via a diaphragm pump 4.
  • a feed point for superheated steam is provided in the vicinity of the reaction container 1. In the course of the sterilization, this flows through the connecting line 2 in a direction which is opposite to the conveying direction of the correction means - indicated by solid arrows - and which is indicated in the figure by dashed arrows.
  • the resulting condensate passes through a further branching of the connecting line 2 into a collecting container 5.
  • the conveyance of the correction agent and the feeding and forwarding of the steam are controlled via a total of four valves 6 to 9, which are arranged in the different branches of the connecting line and of which there are two in the open and two in the closed state.
  • the illustration in FIG. 2 shows the diaphragm pump 4 in a vertically sectioned illustration in an operating state such as is provided for carrying out the sterilization process.
  • the membrane pump 4 consists of a pump head 10 and a drive housing 11, between which a membrane 12 is arranged.
  • the latter can be pneumatic, hydraulic or else can also be operated mechanically.
  • cylindrical recesses 13 and 14 are made, which can be closed by likewise cylindrical inserts 15 and 16 provided with a flange.
  • the inserts 15 and 16 are provided with central through bores 17 and 18, which are coupled to the connecting line 2 on the outside of the inserts 15 and 16 via pipe connecting elements 19 and 20, and which are on the inside of the inserts 15 and 16, respectively open into a self-locking or self-closing outlet valve 21 or inlet valve 22 arranged there.
  • the valves 21 and 22 are arranged in such a way that their opening direction corresponds to the flow direction of the correction means indicated by the solid arrows in the figure.
  • a bore 26 and 27 running perpendicular to the conveying channel 23 and 24 also leads into the inlet and outlet area of the two valves 21 and 22, while the area with an enlarged diameter Delivery channels 23 and 24 each have a second bore 28 and 29, which runs parallel to the first bore, extends directly into the annular space formed by the recesses 13 and 14 and the associated insert 15 and 16, respectively.
  • a further bore 30 or 31 leads from this annulus into the through bore 17 or 18.
  • the bores 28 and 30 or 29 and 31 form bypass lines for the outlet valve 21 and the inlet valve 22 together with the respectively associated enlarged regions of the delivery channels 23 and 24.
  • These bypass lines are, according to the principle of the corner valve , can be shut off via valve spindles 32 to 35, which are respectively arranged in the extension of the delivery channels 23 and 24 and at the height of the bores 30 and 31 and which are designed as piston seat valves in the arrangement shown in FIGS. 2 and 3.
  • the front part of the valve spindles 32 to 35 has a region of reduced diameter, whereby an annular space is created between this region of the spindle and the associated bore when the valve spindles are open.
  • the stroke of the valve spindles 32 to 35 is limited in the exemplary embodiment shown here by a bracket 36.
  • the inserts 15 and 16 are sealed by means of outer sealing O-rings 37 and 38, below which the inserts for forming the annular spaces already mentioned, into which the bores 30 and 31 open, are reduced in diameter.
  • the inserts 15 and 16 are fixed by means of dowel bolts 39 and 40, the attachment to the pump head 10 by means of bolts 41 and 42.
  • valve spindles 32 to 35 assume the closed position shown in FIG. 3 and thus shut off the bypass lines.
  • the liquid correction agent is conveyed from the supply container 3 into the reaction container 1 by means of the pressurized membrane 12 via the inlet valve 22, the delivery channel 24, the displacement chamber 25, the delivery channel 23 and the outlet valve.
  • valve spindles 32 to 35 are opened so that the superheated steam arriving via the connecting line 2 flows through the bore 30 into the annular space surrounding the outlet valve 21 and thereby heats the valve.
  • the latter is important because any condensate forming in this valve cannot flow out due to the valve's closing direction.
  • the hot steam passes through the bore 28 into the further pump areas in contact with the product, i.e. the delivery channels 23 and 24, the displacement chamber 25 and, via the second bypass line, into the annular space surrounding the inlet valve 22.
  • the steam and the condensate formed are discharged via the bore 18 and the adjoining part of the connecting line 2 into the collecting container 5 serving as a condensate drain.
  • valve spindles 132 and 133 are designed in this case as cone seat valves and on the other hand in that the outlet valve 121 is integrated in the insert 115.
  • the inlet area of the pump, not shown here, is constructed identically. The mode of operation of this pump corresponds entirely to that of the arrangement according to FIGS. 2 and 3.
  • valve spindles 232 and 235 are offset by 90 ° from the valve spindles 233 and 234, as are the bores in the inserts 215 and 216 (the latter not shown in the figure). This arrangement facilitates the attachment of a drive for external control of the valve spindles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • External Artificial Organs (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Claims (8)

  1. Pompe à diaphragme, en particulier pour des installations utilisées dans la technologie des procédés biologiques industriels, dans la technologie alimentaire, et dans la technologie médico-biologique, comprenant un diaphragme influant sur une chambre de déplacement, au moins respectivement une soupape d'admission et de sortie à fermeture automatique, ainsi que des conduites de circulation qui raccordent ladite chambre à déplacement auxdites soupapes d'admission et de sortie, caractérisée en ce que des voies de conduit (13, 28, 30 ou respectivement 14, 29, 31) arrêtables sont prévues pour relier ces zones desdites soupapes d'admission ou de sortie (21, 22) qui sont respectivement opposées à ladite chambre de déplacement à la conduite respective (23, 24) y affectée.
  2. Pompe à diaphragme selon la revendication 1, caractérisée en ce que une part desdites voies de conduit est respectivement configurée sous forme d'un creux (13, 14) qui entoure ladite soupape d'admission ou de sortie.
  3. Pompe à diaphragme selon la revendication 2, caractérisée en ce que ledit creux (13, 14) est configuré sous forme d'un espacement annulaire.
  4. Pompe à diaphragme selon une quelconque des revendications 1 à 3, caractérisée en ce que lesdites voies de conduit (13, 28, 30 ou respectivement 14, 29, 31) sont arrêtables au moyen des tiges de soupape (32-35, 132-135).
  5. Pompe à diaphragme selon la revendication 4, caractérisée en ce que lesdites tiges de soupape (32-35, 132-135) présentent une section transversale réduite dans la zone du siège de soupape.
  6. Pompe à diaphragme selon la revendication 4 ou 5, caractérisée en ce que lesdites tiges de soupape (32-35) sont configurées sous forme des soupapes à piston et à siège.
  7. Pompe à diaphragme selon la revendication 4 ou 5, caractérisée en ce que lesdites tiges de soupape (132-135) sont configurées sous forme des robinets à pointeau et à siège.
  8. Pompe à diaphragme selon une quelconque des revendications 1 à 7, caractérisée en ce que ladite soupape d'admission ou de sortie (121) est respectivement formée intégralement sur un insert (115) qui obture lesdits creux (13, 14).
EP90120510A 1989-11-14 1990-10-25 Pompe à membrane Expired - Lifetime EP0427988B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90120510T ATE84122T1 (de) 1989-11-14 1990-10-25 Membranpumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3937847 1989-11-14
DE3937847A DE3937847C1 (fr) 1989-11-14 1989-11-14

Publications (2)

Publication Number Publication Date
EP0427988A1 EP0427988A1 (fr) 1991-05-22
EP0427988B1 true EP0427988B1 (fr) 1992-12-30

Family

ID=6393496

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120510A Expired - Lifetime EP0427988B1 (fr) 1989-11-14 1990-10-25 Pompe à membrane

Country Status (3)

Country Link
EP (1) EP0427988B1 (fr)
AT (1) ATE84122T1 (fr)
DE (2) DE3937847C1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE504043C2 (sv) * 1995-02-06 1996-10-21 Carl Goeran Hellstroem Kolvpump samt backventilarrangemang för en dylik kolvpump
US7175397B2 (en) 2002-09-27 2007-02-13 Pulsafeeder, Inc. Effervescent gas bleeder apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3181474A (en) * 1962-06-04 1965-05-04 Union Pump Co Dismountable pressure pump
US3802807A (en) * 1972-06-02 1974-04-09 Precision Control Prod Corp Pump
US3819303A (en) * 1973-06-13 1974-06-25 Ecodyne Corp Relief-release pumps
DE2814086C2 (de) * 1978-04-01 1980-01-10 Milch-Union Oberbayern Gmbh & Co Kg, 8000 Muenchen Dosierpumpe für Milch u.dgl
GB2192673A (en) * 1986-06-02 1988-01-20 Thomas Leslie Seaborne Improved diaphragm milk pump

Also Published As

Publication number Publication date
EP0427988A1 (fr) 1991-05-22
ATE84122T1 (de) 1993-01-15
DE59000693D1 (de) 1993-02-11
DE3937847C1 (fr) 1991-02-28

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