EP1809903A1 - Pompe a membrane destinee au transport de liquides - Google Patents

Pompe a membrane destinee au transport de liquides

Info

Publication number
EP1809903A1
EP1809903A1 EP05792541A EP05792541A EP1809903A1 EP 1809903 A1 EP1809903 A1 EP 1809903A1 EP 05792541 A EP05792541 A EP 05792541A EP 05792541 A EP05792541 A EP 05792541A EP 1809903 A1 EP1809903 A1 EP 1809903A1
Authority
EP
European Patent Office
Prior art keywords
pump
valve
liquid
check
membrane
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.)
Withdrawn
Application number
EP05792541A
Other languages
German (de)
English (en)
Inventor
Dirk Budde
Roger Klein
Andreas Kneer
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.)
PSG Germany GmbH
Original Assignee
Almatec Maschinenbau 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 Almatec Maschinenbau GmbH filed Critical Almatec Maschinenbau GmbH
Publication of EP1809903A1 publication Critical patent/EP1809903A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0076—Piston machines or pumps characterised by having positively-driven valving the members being actuated by electro-magnetic means
    • 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
    • F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • F04B43/0736—Pumps having fluid drive the actuating fluid being controlled by at least one valve with two or more pumping chambers in parallel
    • 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
    • F04B53/04—Draining
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections

Definitions

  • the invention relates to a membrane pump for the transport of liquids.
  • a diaphragm pump in a design as a double diaphragm pump is known for example from DE 33 10 131 A1.
  • a pump housing has two product and two pressure chambers, which are each separated by a membrane.
  • the membranes are connected to each other via a common coupling rod, which is guided by the two pressure chambers.
  • compressed air is passed alternately into one of the two pressure chambers, the membrane of the pressurized chamber running a delivery stroke into the adjacent product chamber and the second membrane due to the coupling via the coupling rod performs a suction stroke.
  • the mutual loading and venting of the pressure chambers is achieved via a control slide device, which is arranged parallel to the Koppel ⁇ rod, and cyclically releases individual control ports.
  • Such diaphragm pumps are often used to convey high purity and / or flammable liquids. First, they have only static seals that come into contact with the pumped liquid, and are thus characterized by an extremely low contamination of the product liquid by wear particles. On the other hand, the drive and the reversal of the pump takes place on a purely mechanical basis, so that it can be apart from special safety measures for fire protection, as required for electrically driven or actuated pumps.
  • the invention is based on the problem, a diaphragm pump, as known for example from DE 33 10 131 A1, for conveying a liquid in the sterile area to improve and in particular to allow voll ⁇ permanent emptying and purging of the pump.
  • all fluid-carrying surfaces of the pump can be arranged inclined. This can prevent it When draining the pump to product deposits on non-sloping surfaces can come.
  • all surfaces are to be understood to mean an embodiment which relates at least to those surfaces which make it possible to carry out the object according to the invention substantially, i. advantageous over the prior art to solve.
  • inclined is understood to be a position of a surface (in the operating position of the pump) which is not perpendicular to the direction of gravity or a resultant of gravity and another force.
  • liquid-conducting surface is understood according to the invention to mean a surface which comes into contact with the liquid due to the effect of gravity or a resultant of gravity and another force, and consequently in particular the lower boundary surface or the lower surface segment (FIG. for example, in a circular cross-section) of a liquid-conducting chamber or conduit.
  • liquid-conducting surfaces of the pump are inclined, but all the surfaces that come into contact with the liquid.
  • the product chamber (s) of the pump can be flown by the inlet and / or outlet of the respective product chamber with the liquid to be conveyed in such a way that a direct flow of at least a portion of the membrane and / or an edge region of the product chamber is produced.
  • Direct inflow is understood to mean a flow of the fluid, which is directed in a targeted manner to particular locations within the product chamber, in which the fluid exchange during purging is rather low. These locations are often in the peripheral areas of the product chamber (s), and in particular at the joints where the membrane is connected to the housing of the product chamber (s).
  • the direct flow thus differs from the tangential flow used in such pumps, in which the fluid is conducted at the sharpest possible angle with respect to the membrane surface from the inlet and / or outlet into the working chamber.
  • the Tangentialanströmung the product chamber (s) of a diaphragm pump is characterized by a uniform flow as possible, with the disadvantages that problem areas are not optimally achieved. Due to the direct inflow according to the invention, the cleaning medium (flushing agent) is directed in a targeted manner in order to eliminate the aforementioned problem zones.
  • the relevant points within the product chamber at an angle of 90 ° ⁇ 20 °, preferably from 90 ° ⁇ 10 ° and particularly preferably from 90 ° ⁇ 5 ° (each comprising the entire area) are flown. This can provide a particularly good flushing of these sites by creating turbulences within the liquid flow, which positively influence the liquid exchange.
  • connection of two adjoining liquid-conducting surfaces of the pump is at least partially continuous.
  • valve seats of the check valves are shown as such stages.
  • An embodiment of a check valve according to the invention can therefore have a valve housing which has two sections with different inner dimensions, the transition between the sections constituting the valve seat, and the two sections being offset from one another such that the transition between the sections of the Valve housing is infinitely variable in a region of the valve seat.
  • housing sections of a ball return check valve with an (inner) circular cross section are suitable for this purpose.
  • the stepless portion of the valve seat is preferably arranged on that side of the check valve on which the liquid drains by gravity (gravity side).
  • a device may be provided which allows the locking bodies of the check valves of the pump, e.g. by raising a Magneti ⁇ 's field, independent of the pressure ratios generated by the pump from their valve seat lift off.
  • Check valves which are suitable for use in the pump according to the invention, have a valve housing and a locking element movably mounted therein. At least a portion of the barrier element has (ferro) magnetic or magnetizable properties and can be lifted by applying an external magnetic force from its valve seat.
  • the need to open the valves via a magnetic force is insbe ⁇ special for the reason that can be dispensed ver ⁇ on mechanical valve lifters, which are often performed from the outside through the valve body to the locking body and thus have the disadvantages that they represent further (movable) components within the pump and also cause an additional seal in the valve housing.
  • permanent magnets are used to generate the magnetic field, the temporary, i. only for
  • valve housing in the region of the valve seat has a circular cross-section, wherein the blocking element is designed in the form of a sphere.
  • ball check valves are characterized by a secure closing, so that it is possible to dispense with a special leadership of Sperr ⁇ elements.
  • the (ferro) like netic portion of the ball check valve may be designed in particular as a ball core.
  • the material of the ball shell can be selected as needed, for example, according to the liquid to be conveyed.
  • the sealing effect of the ball in its valve seat can be improved by the use of elastic materials as a jacket.
  • PTFE is used as the material for the ball jacket.
  • ferromagnetic materials especially iron are suitable for the formation of the ball core.
  • Another advantage of an iron core can be the increase in the specific gravity of the ball, which among other things can lead to an improvement in the suction effect. This can be influenced by dimensioning the iron core.
  • a check valve according to the invention can also have a shape of the valve seat, which corresponds to the contour of the blocking element in the contact area.
  • valve seat The adaptation of the annular surface of the valve seat to the contour of the Sperrele ⁇ element causes the effective sealing surface and thus the sealing effect is increased, whereas conventional ball valves usually have only one valve seat in the form of a (sealing) edge.
  • FIG. 1 shows a cross section through an inventive Doppelmembran ⁇ pump.
  • FIG. 2 is a side view of the double diaphragm pump of FIG. 1;
  • FIG. 3 shows an alternative embodiment of a double membrane diaphragm pump according to the invention
  • 4 shows a perspective detailed view of a housing of a check valve according to the invention
  • FIG. 5 shows a cross section through a Doppelmembran ⁇ pump according to the invention in a third embodiment.
  • Fig. 6 is a side view of the double diaphragm pump of Fig. 5;
  • FIG. 7 shows a cross section through a Doppelmembran ⁇ pump according to the invention in a fourth embodiment
  • FIG 8 shows a cross section through a double diaphragm pump according to the invention in a fifth embodiment.
  • 1 and 2 has a pump housing 1 with two product chambers 2, 3 lying in the outer regions of the pump housing 1, through which the product liquid is conveyed via feed lines 4 located outside the housing.
  • the two product chambers 2, 3 are each separated by a membrane 5, 6 from corresponding pressure chambers 7, 8.
  • Completely smooth, continuous membranes are used, for example made of PTFE or EPDM or another suitable material, without a diaphragm plate and other seals.
  • the pump is supplied with compressed air via a feed line (not shown). This is supplied via the spool 9 alternately either the left (8) or right (7) pressure chamber. During the admission of a pressure chamber, the respective other pressure chamber is vented. The filling of a pressure chamber 7, 8 with compressed air leads to a working stroke, the corresponding membrane 5, 6 in the product chamber 2, 3 into it (in Fig. 1, the right chamber 2). The working stroke of the right-hand diaphragm 5 thus reduces the effective volume of the product chamber 2 and conveys the product fluid through the right-hand outlet valve 10 to the pump outlet 11.
  • the left-hand membrane 6 is pulled back into the corresponding pressure chamber 8 by coupling the two membranes 5, 6 by means of a coupling rod 12, the latter being vented.
  • a coupling rod 12 By this suction stroke, the effective volume of the left product chamber 3 is increased and sucked liquid through the left inlet valve 13, wherein the blocking body is lifted in the form of a ball 14 of the valve seat 15 and thus releases a flow.
  • the movement of the balls 14 of the check valves is restricted by a stroke limiter 16.
  • the ball 14 of the left exhaust valve 17 is pulled into the valve seat 15, thereby closing the outlet.
  • the compressed air is diverted into the left-hand pressure chamber 8.
  • the left diaphragm 6 accordingly starts its working stroke, while the right diaphragm 5 performs a suction stroke.
  • permanent magnets 18 are placed on all valves - shown in Fig. 1 only for the right pump half.
  • the permanent magnets 18 generate a magnetic field that lifts the balls of the check valves having a ferromagnetic iron core (not shown) from the valve seats 15.
  • the liquid can - following the gravity, opposite to the conveying direction - run out of the pump.
  • a continuous operation of the pump with possibly reduced Schlag ⁇ number can still support the emptying of the pump.
  • the drainage of the liquid can be further assisted by a treatment of the surfaces with the aim of reducing the mean surface roughness.
  • valve housing are designed such that the effluent does not have to overcome paragraph.
  • valve housings consist of two circular sections which have a different diameter and are arranged offset from one another in such a way that they merge into one another in the lower area without offset and in a straight line.
  • the annular valve seat 15 and the plane formed thereby is not arranged perpendicular to the central axes of the two sections, but is in a position inclined thereto.
  • valve seats 15 are concave surface formed with a radius that corresponds to that of the ball substantially.
  • sealing surfaces between the valve seats 15 and the balls 14 are achieved, which can improve the seal in comparison to sealing edges (see also FIG. 4).
  • valve seats can be advantageously produced by the use of a ball mill. This would in the present embodiment parallel, but slightly offset from the central longitudinal axis of the smaller Ventil ⁇ housing section are supplied to this and the valve seat, which has already formed by the penetration of the two valve housing sections, the concave shape impress.
  • Fig. 3 shows an alternative embodiment of a pump according to the invention, which differs from that of Fig. 1 only by their design as a double diaphragm pump with Tandemmembranen 5a, b, 6a, b. Due to the blocking chambers 19, 20 within a tandem membrane 5a, b, 6a, b, they can also satisfy extreme safety requirements.
  • a double diaphragm pump according to the invention can be easily upgraded to a tandem pump.
  • the diaphragm pump according to the third embodiment differs from the previously described embodiments, in particular with regard to the shape of the product chambers 102, 103 and the course of the supply lines 104.
  • the supply lines (inflow / outflow) 4 are formed as a continuous pipe having only one side a connection to the working chambers 2, 3. Thereby, a straight, substantially laminar flow of the liquid between inlet and outlet can be achieved, which is advantageous in terms of flow resistance.
  • the supply lines 104 open into the product chambers 102, 103 with their full cross section. Furthermore, the supply lines are bent shortly before the outlet into the product chambers 102, 103 guided whereby the flow of the liquid impinges on the vertical planes of the membranes 105, 106 at a relatively large, almost vertical angle. This provides for increased turbulence within the fluid flows and thus for a good fluid exchange in the region of the mouths of the product chambers 102, 103.
  • Supply line 104 is the case: Since there is a risk that when emptying the pump
  • Flow resistance of the pump can affect.
  • the deflection is about 89 °.
  • FIG. 7 shows an embodiment in which the lower feed line 204 is designed angled to the same extent as the upper feed line 204.
  • Fig. 8 shows an embodiment of the pump, which differs from that of Figs. 5 and 6 only by the use of a double membrane 105a, b, 106a, b (with enclosed lock chamber 119, 120) per product chamber 102, 103.
  • a diaphragm pump it is now also suitable for use in the transport of liquids in the sterile field, for example in the pharmaceutical sector or in the field of biochemistry. For this purpose, only rotating pumps have hitherto been used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne une pompe à membrane destinée au transport de liquides. L'invention vise à améliorer cette pompe à membrane pour une utilisation dans le domaine stérile. A cet effet, toutes les surfaces qui viennent en contact avec le liquide à transporter, sont inclinées. En outre, toutes les transitions de surfaces guidant le liquide sont réalisées sans gradin. Pour faire fonctionner à vide la pompe à membrane, les éléments de blocage des clapets anti-retour présents sont soulevés de leur siège par la génération temporaire d'un champ magnétique. Un guidage ciblé amélioré de l'écoulement de liquide assure un bon rinçage sensiblement sans résidu de l'ensemble de la pompe.
EP05792541A 2004-09-17 2005-09-16 Pompe a membrane destinee au transport de liquides Withdrawn EP1809903A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004045687A DE102004045687A1 (de) 2004-09-17 2004-09-17 Membranpumpe für den Transport von Flüssigkeiten
PCT/EP2005/010018 WO2006029898A1 (fr) 2004-09-17 2005-09-16 Pompe a membrane destinee au transport de liquides

Publications (1)

Publication Number Publication Date
EP1809903A1 true EP1809903A1 (fr) 2007-07-25

Family

ID=35453428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05792541A Withdrawn EP1809903A1 (fr) 2004-09-17 2005-09-16 Pompe a membrane destinee au transport de liquides

Country Status (3)

Country Link
EP (1) EP1809903A1 (fr)
DE (1) DE102004045687A1 (fr)
WO (1) WO2006029898A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006046567B3 (de) * 2006-08-30 2008-03-06 Knf Neuberger Gmbh Membranpumpe mit wenigstens zwei in unterschiedlichen Ebenen angeordneten Membranen
USD923060S1 (en) 2018-08-09 2021-06-22 Psg Germany Gmbh Pump

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE697303C (de) * 1938-05-01 1940-10-10 Pleiger Paul Membranpumpe
DE825798C (de) * 1950-06-13 1951-12-20 Georg Volland Dr Ing Vorrichtung zum Entleeren von Fluessigkeitspumpen
DE1961838U (de) * 1966-10-14 1967-06-08 Realpa A G Rueckschlagventil.
US4381180A (en) * 1981-07-13 1983-04-26 Sell John R Double diaphragm pump with controlling slide valve and adjustable stroke
US4854832A (en) * 1987-08-17 1989-08-08 The Aro Corporation Mechanical shift, pneumatic assist pilot valve for diaphragm pump
DE3737350A1 (de) * 1987-11-04 1989-05-24 Kopperschmidt Mueller & Co Pumpenanordnung mit doppelpumpe
GB2222230A (en) * 1988-08-23 1990-02-28 Score A pipeline check valve
DE3909800A1 (de) * 1989-03-24 1990-09-27 Neuhaeuser Gmbh & Co Membranpumpe zum pneumatischen foerdern von fluidisierten schuettguetern
US5205819A (en) * 1989-05-11 1993-04-27 Bespak Plc Pump apparatus for biomedical use

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006029898A1 *

Also Published As

Publication number Publication date
DE102004045687A1 (de) 2006-03-23
WO2006029898A1 (fr) 2006-03-23

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