EP1611355B9 - Pompe a membrane - Google Patents

Pompe a membrane Download PDF

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Publication number
EP1611355B9
EP1611355B9 EP04724563A EP04724563A EP1611355B9 EP 1611355 B9 EP1611355 B9 EP 1611355B9 EP 04724563 A EP04724563 A EP 04724563A EP 04724563 A EP04724563 A EP 04724563A EP 1611355 B9 EP1611355 B9 EP 1611355B9
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EP
European Patent Office
Prior art keywords
chambers
chamber
shut
pump
pumping
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
EP04724563A
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German (de)
English (en)
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EP1611355B1 (fr
EP1611355A1 (fr
Inventor
Peter Jähn
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Dritte Patentportfolio Beteiligungs GmbH and Co KG
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Dritte Patentportfolio Beteiligungs GmbH and Co KG
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Priority to PL04724563T priority Critical patent/PL1611355T3/pl
Publication of EP1611355A1 publication Critical patent/EP1611355A1/fr
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Publication of EP1611355B1 publication Critical patent/EP1611355B1/fr
Publication of EP1611355B9 publication Critical patent/EP1611355B9/fr
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    • 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
    • F04B43/0733—Pumps having fluid drive the actuating fluid being controlled by at least one valve with fluid-actuated pump inlet or outlet valves; with two or more pumping chambers in series
    • 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
    • F04B43/0081—Special features systems, control, safety measures
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F04B49/14—Adjusting abutments located in the path of reciprocation

Definitions

  • the present invention relates to a diaphragm pump based on DE-A 102 16 146
  • a diaphragm pump with at least two channels for the liquid supply and liquid discharge but with variable displacement which is achieved by a metering device in the form of a dosing and the use of this diaphragm pump as a controllable valve or as controllable Mehrwege- distribution valves or multi-component distribution valves.
  • a diaphragm pump with a multi-part pump body and two channels which consists of at least three rigid plates and at least two elastic membranes arranged between these plates, the plates in particular a pumping chamber and at least two shut-off chambers each having an inlet and an outlet opening for the Form conveyed, and form the pumping chambers and shut-off chambers together with an inlet channel the connecting channels and an outlet channel, a passage, said pumping chamber and the shut-off chambers are divided by the membranes in each a product space and a control room and the control chambers have control lines, which are connected to a control unit are.
  • the solution of the problem and object of the present invention is a modular lamellar constructed electro-pneumatically driven pump head as a diaphragm pump (according to Fig.1 respectively.
  • Fig. 2 which consists of several parts of at least three rigid plates (lamellae) (201, 203, 205) and at least two arranged between these plates elastic membranes (204, 202), wherein the plates (201, 203, 205) at least one pumping chamber (211 ) and at least two shut-off chambers (210, 212), in particular in the geometry of a spherical section, a spherical zone, a cylinder or truncated cone, each with an inlet (240) and an outlet opening (241) for the conveyed form, and the pumping chamber ( 211) and the shut-off chambers (210, 212) together with an inlet channel (207), the connection channels ((208) and (209)) and an outlet channel (206) form a passage, wherein the pumping chamber (211) and
  • the diaphragm pump has a decentralized electro-pneumatic control unit (100, 115) with vacuum generator for driving the pump head and the center distance of the respectively adjacent inlet and the outlet of each pumping and shut-off chamber is two to ten times the largest hydraulic diameter of the respective inlet (240) or outlet opening (241).
  • the membrane pump according to the invention is preferably designed such that the pumping chamber (211) and the shut-off chambers (210, 212) are sealed at the edge by the membranes (204, 202).
  • the design of the outer plate (205) is carried out to such an extent that preferably the movable disk and the rod together with the external adjustment possibility are accommodated. This requires that the outer plate is usually thicker or stronger than the plates (201) or (203).
  • the clamped between the plates elastic membrane is pneumatically loaded and relieved by the drive (control unit), so that in closing operating the active membrane surface by the control pressure to the limiting wall of the product side pump or shut-off chamber and in the opening or unloaded operating condition by the The inherent elasticity of the diaphragm material and is deformed by the negative pressure to the limiting wall of the control room.
  • the largest applied motive force is rectified with the largest membrane deformation path.
  • the applied force for the conveying or closing movements of the membranes are greater than the force applied to retrieve the membranes.
  • the membrane load and membrane deformation is symmetrical, so that the dosing accuracy and the membrane life is increased.
  • the diaphragm pump according to the invention consisting of the pump head according to the invention and the decentralized control unit allows conveying small volumes per unit time, has a high short-term dosing accuracy based on the individual Dosierhub, shows a good intake behavior, can promote even in non-flooded state of the pump head against pressure and allowed also at any time the partial lift operation.
  • the membrane pump according to the invention allows in various applications, the conveyance of liquids having a viscosity range of 0.001 Pas to 10 Pas, preferably 0.001 to 5 Pas and more preferably of liquids having a viscosity of 0.001 to 2 Pas.
  • the disk (1001) in the control chamber of the pumping chamber (211) which can be moved in the axial direction by rotary or lifting movement makes it possible to vary the maximum stroke of the pumping diaphragm (204), so that pumping in a partial lifting operation is possible.
  • there is a further reduction of the membrane load so that depending on the elastic material used, the deformation occurring is reduced by changing the membrane stroke.
  • the movable disc reduces the deformation path in the unloaded state.
  • the axially movable wall (1001) within the control chamber of the pumping chamber varies the membrane movement in the axial direction in a range of 1% up to 100% of the design stroke, preferably the limitation of 10% to 100% and especially Preferably, the limitation is in a range of 20% to 100% of the stroke without increasing the dead space volume of the pumping chamber.
  • the area of the movable disk is slightly smaller than the area of the active-active membrane. Slight in the sense of the present invention means that the membrane-facing surface of the axially movable disc has a size of 60% of the active membrane surface, preferably a size of 61% to 80% and particularly preferably a size of 81% to 95% based on the active membrane surface.
  • the elastic membrane is supported over a large area during operation and increases the dosing accuracy.
  • the rod (1002) allows the movable disc (1001) to be adjusted from outside the diaphragm pump by passing it through the outer plate (205).
  • the adjustment is done by rotation or stroke adjustments, for example, manually, motor, hydraulic, pneumatic or piezo-operated, whereby an automatic fine adjustment of the partial stroke can be made.
  • the rod may for example be a threaded rod or be executed without a thread as a cylinder rod or as a square rod.
  • the movable disc or the rod is sealed with a seal to the plate (205) to the outside, so that the control chamber can be pressurized.
  • the axial disc adjustment within the control chamber of the pumping chamber can in a preferred embodiment of the invention via the rod (1002) also be carried out automatically or remotely controlled when an electrically operated motor, a hydraulic or a pneumatic actuator is mounted.
  • shut-off chambers also electrically, hydraulically or pneumatically.
  • An automatically adjustable partial lift of the pumping membranes forms an actuator, so that in combination with e.g. a flow sensor, a flow control can be established.
  • the set delivery rate of the pneumatic pump for example, can be controlled gravimetrically. If deviations from the predetermined metering power occur, the weighing sensor transmits a signal to the monitoring controller, and the controller sends a control signal to the adjustment drive, which is attached to the rod of the movable disk (1001) and adjusts the disk in the pump control chamber in the axial direction and thus a change of Pump stroke volume makes a correction of the pump delivery rate.
  • the axially movable disk (1001) used in the control chamber can have different shapes to the membrane side.
  • the disc may take the form of a flat cylindrical disc ( Fig. 2a ), a blunt cone ( Fig. 2b ) or the shape of a sphere section ( Fig. 2c ) to have.
  • a disk shape adapted to the pumping chamber has advantages in that, with maximum adjustment of the movable disk, the feeding and discharging connection channels (208/209) of the pumping chamber are closed.
  • the axially movable disc (1001) is provided with openings or bores (1007) and optionally additionally provided on the side facing away from the membrane with a concentrically raised ring (1008), so that upon complete recovery of the disc, the pneumatic connection can not be closed.
  • the movable disc ( Fig. 2c ) with unilaterally extended rod is bored on one side to allow the direct connection of the control energy to the movable disc.
  • the diaphragm pump is designed such that the movable disc (1001) is flat on the diaphragm side or shows a blunt cone or is adapted to the product-side pumping chamber and provided with a plurality of bores (1007).
  • the application of the partial stroke operation applies to pump chambers with a stroke volume of greater than 5 ⁇ l / stroke up to 1000 000 ⁇ l / stroke.
  • the membrane pump according to the invention can be produced inexpensively from various resistant materials due to different corrosion requirements in the chemical industry.
  • the design of the control or drive technology of the diaphragm pump according to the invention has no influence on the pump head size and the possibility of integration in a miniaturized pilot plant setup.
  • the membrane pump according to the invention can be modular, so that can be done by appropriate additions or replacement of modular parts, a slight task adaptation to the material to be conveyed.
  • the change in the dosing without the displacement of the membrane or the movable disc (1001) in the pump head increases the dead volume, so that the aspirated liquid volume is completely displaced from the pump head at any time.
  • control pressure on the diaphragm in all control chambers is at least 0.1 bar higher than the prevailing pressure at the outlet channel by a pressure regulator upstream of the control unit or at the inlet channel of the pump head, preferably the control pressure is at least 0.5 bar higher, and more preferably the control pressure is 1 bar higher than the expected pressure at the outlet or at the inlet channel.
  • outlet or inlet channel (206, 207) and control pressure ensures tight sealing of the respective inlet and outlet ports in the pump and shut-off chambers by the membrane.
  • the membranes (202, 204) are preferably made of an elastic material, particularly an elastomer, silicone, Viton ®, Teflon ®, or rubber, in particular of an elastic laminate of the at least two interconnected layers of material with different modulus of elasticity is.
  • a preferred embodiment of the membranes is characterized in that they consist of an elastic laminate consisting of at least two interconnected material layers with different modulus of elasticity. The individual layers are glued together or connected. In principle, this feature is also based on a diaphragm pump DE-A 102 16 146 applicable.
  • a preferred embodiment of the membranes used is characterized in that thin elastic films are partially chambered and the components or components for membrane chambering of corrosion-resistant materials and chambers up to 30% of the product-contacting membrane surface chambers, preferably up to 65% and more preferably up to 80% of the product-contacting membrane surface chambers.
  • the use of a chambered membrane reduces the plastic deformation that occurs during loading, so that under high load the membrane deformation is extremely low.
  • the two plate-shaped diaphragm chamber elements are preferably disk-shaped, and have on the outer diameter a concentric membrane ring formed to the side (1102, 1103), so that large membrane surface portions are clamped and subject in the chambered area no deformation force or tensile force.
  • chamber elements are used with a membrane diameter of greater than 10 mm to less than 1000 mm, preferably in a diameter range of greater than 50 mm less than 800 mm and more preferably used in a diameter range of greater than 100 mm to less than 500 mm.
  • the product-side surface (1104) of the membrane-chamber component may be provided with an elastic layer or foil to close tightly the feed and discharge connection channels of the pumping chamber (see Fig. 3 ).
  • Very large pumping chambers provided with chambered diaphragms may be provided with axial guidance for weight compensation caused by the weight of the chamber elements.
  • the axial guidance may alternatively take over the function of the rod (1002).
  • the axial guide may be a hollow rod (pipe).
  • a preferred embodiment of the diaphragm pump or of the pump head in which a plurality of shut-off chambers have a common membrane ( Fig. 1 ).
  • a preferred embodiment of the diaphragm pump or the pump head is characterized in that the pump head consists of at least three plates and the pumping and shut-off chambers are formed by depressions in the plates ( Fig. 2 ).
  • the diaphragm pump or the pump head consists of at least three plates and the pumping and shut-off chambers (210, 211, 212) are formed by depressions in the middle plate.
  • diaphragm pump or of the pump head is characterized in that it consists of at least three plates and the pump and shut-off chambers (210, 212) by depressions (210 ', 211', 212 ') in the outer plates (201,203,205) are formed.
  • At least in the product space of the pumping chamber (211) is a groove (213) which connects the apex of the pumping chamber depression with the outlet opening of the pumping chamber.
  • the volume of the incorporated groove in the pumping chamber is equal to the dead space volume of the pumping chamber.
  • the dead space volume with respect to the pumping chamber volume is extremely small, sometimes less than 1%.
  • the walls of the control chambers opposite the membrane, but at least the pumping chamber have a compensation volume in the form of a flat depression.
  • the diaphragm can deform in pending negative pressure in the control room and in extreme cases cling to the limiting wall of the control room.
  • the maximum membrane elongation or membrane deformation is determined by determining the change in length between chord length and arc length of a circular segment.
  • the membrane is unloaded at the level of the chord of the circular section and loaded at the level of the arc length of the circular section.
  • the membrane elongation can be determined from the length difference between the tendon and the arch ( Fig. 8 ). By analogy, this procedure can also be transferred to other pumping and shut-off chamber geometries.
  • the maximum deformation of the active-active membrane into the larger product-side depression must be at most 20%, preferably 0.01% to 10% and particularly preferably the deformation must be 0.01% to 5% in order to achieve a high constant membrane movement and a high dosing accuracy. especially short-term accuracy, to obtain.
  • the determined membrane deformation limits therefore determine the heights of the shut-off and pump chamber as well as the control and product spaces formed by membranes, so that the dosing accuracy of the inventive diaphragm pump is improved substantially in comparison with known diaphragm pumps.
  • the compensation volume describes the space into which the existing membrane deforms when the vacuum is applied. If the compensating volume is increased and equipped with an adjustable disc (1001), then the compensating volume due to axial adjustment of the movable disc (1001) has no influence on the product-side recessed volume of the pumping chamber.
  • the product spaces of the shut-off chambers (210, 212) are made smaller than the product space of the pumping chamber (211).
  • the shut-off chamber volume is 5% to 50% of the product-side pumping chamber volume, preferably 5% to 30% and particularly preferably 5% to 20%.
  • this feature is also based on a diaphragm pump DE-A 102 16 146 applicable
  • the center distance of the respectively adjacent inlet and the outlet of each pumping or shut-off chamber is two to ten times the largest hydraulic diameter of the respective inlet (240) or outlet opening (241), preferably the center distance is twice to five times, and more preferably the two - up to four times, most preferably three to four times ..
  • the defined center distance is an important functional measure of the chambers. It ensures a tight closing of the incoming and outgoing channels or openings and increases the reproducible delivery of gaseous or liquid substances and influences the degree of miniaturization.
  • the connecting channels (208, 209) between the pump chamber and the shut-off chambers are straight in a preferred embodiment and have a ratio of channel length to the respective hydraulic diameter of the channels from 0.5 to 20, preferably 0.5 to 10, particularly preferably 0, 5 to 5, on.
  • the cross sections of the feeding channels to the pumping chamber are larger than the discharge channels to the outlet of the diaphragm pump according to the invention.
  • the connecting channels and sub-sections of the inlet and outlet channel are at an angle ⁇ , the angle ⁇ in a range of +/- 20 to 70 degrees, preferably in one Range of +/- 30 to 60 degrees ( Fig. 3b ).
  • the angle ⁇ is measured from the vertex of the lowest point of the respective chamber to the associated connection channel or inlet or outlet channel ( Fig. 3b ).
  • the angled channels and channel sections reduce flow losses during the suction and delivery process.
  • a pressure loss reduction is particularly advantageous because flow processes in the diaphragm pump according to the invention or in the pump head are initiated by abruptly changing changes of pressure and vacuum.
  • the obliquely extending connecting channels and inlet and outlet channels reduce the shear occurring during conveying, so that shear-sensitive substances in biological or medical technology are gently metered or conveyed. In principle, this feature is also based on a diaphragm pump / pump head DE-A 102 16 146 applicable.
  • the small dead space between the pump and shut-off chambers improves the suction capacity of the diaphragm pump or the pump head and avoids deposits in the dosing head.
  • diaphragm pump / pump head is characterized in that the pump head consists of at least three plates and at least one outer plate is formed tempered. In principle, this feature is also based on a diaphragm pump / pump head DE-A 10216 146 applicable.
  • the tempering of the outer plate is carried out by thermostating or by electrical heating with separate cooling device.
  • the present invention also preferably relates to a diaphragm pump with controllable valves and decentralized control unit, characterized in that in the pump head in the flow direction of the fluid, the inlet channel with flowed through the barrier chamber and connecting channel to the pumping chamber has a larger hydraulic cross-section than the dissipative connection channel with the following shut-off chamber and outlet channel.
  • the present invention particularly preferably relates to a diaphragm pump with controllable valves and decentralized control unit, characterized in that in the pump head, the volume of the pumping chamber (211) in the range of 0.005 ml to 1000 ml, preferably from 0.01 ml to 100 ml and more preferably the volume of the pumping chamber 0.1 ml to less than 10 ml.
  • the present invention particularly preferably relates to a diaphragm pump with controllable valves and decentralized control unit, characterized in that the dead space volume of the product space of the pumping chamber (211) is less than 20% in the pump head, preferably less than 10% and particularly preferably less than 5% of the pumping chamber volume is.
  • An increase in output, for example, by two pump heads with controllable valves and a decentralized control unit consisting of three plates and in the parting planes of the plates located wells with common inlet and outlet channels and angled connecting channels between pumping and shut-off is possible in a particularly compact design by a pump chamber (303, 303 ') and at least two shut-off chambers (301,305) are introduced in the middle plate on both sides and the inlet channel in ansaugender flow direction to a transverse channel opens the two shut-off chambers (301, 301 ') connects, and in the outgoing flow direction also a transverse channel two shut-off chambers (305, 305') connects and via the outlet channel to be conveyed material from the pump head and in conjunction with the decentralized control the actuation of all pumping and shut-off is switched so that the function of a double diaphragm pump with controllable valves is provided ( Fig. 3a ).
  • the membranes of the double membrane pump operate alternately, so that the pulsation of the fluid flow is almost completely compensated.
  • Each of a pumping chamber associated shut-off chambers must be controlled offset in time in the control process, so that the pulsations occurring are halved. This requires an extended control flow.
  • the three plates of this diaphragm pump according to Fig. 3a are preferably detachably connected to each other for cleaning and repair purposes.
  • the double diaphragm pump can be equipped such that at least one pumping chamber is equipped with a movable disk for a partial lifting operation.
  • a further preferred form of the membrane pump is characterized in that the pump consists of at least three plates and in the middle plate ( Fig. 4 or Fig. 4a ) is provided at least one pumping chamber and belong to each pumping chamber at least three smaller shut-off chambers and each shut-off chamber has a connection channel to the pumping chamber and an inlet or outlet channel for the supply or discharge of at least one fluid and all chambers are controlled separately via a decentralized control unit.
  • a diaphragm pump consisting of a pumping chamber and at least three associated shut-off chambers, allows the sequential or the alternate delivery of at least two different fluids.
  • a process can be supplied with two different substances with one pump, wherein the stroke ratio of the substances to be conveyed may be the same or different.
  • the setting of the stroke ratio is done via the decentralized control unit.
  • the advantages of the user are that with a dosing unit, with low investment and assembly costs as well as in the smallest space requirement with a pumping unit several substances in a desired ratio can be supplied to a process.
  • the use of the membrane pump according to the invention is particularly advantageous.
  • the diaphragm pump or pump head according to the invention is used as a conveying and removal device.
  • the diaphragm pump according to the invention or the pump head according to the invention is suitable for sampling liquids or gases from closed apparatus.
  • a pump connection for sampling and preparation is shown.
  • Two diaphragm pumps (700, 700 ') after Fig.4, 4a (400) are combined with a mixing chamber (701) so that all functional parts are incorporated in the three, but enlarged, pump plates.
  • the diaphragm pumps have a pumping chamber (702, 702 ') and each pumping chamber has four associated shut-off chambers (703, 704, 705, 706 and 703', 704 ', 705', 706 ').
  • the shut-off chambers are each inlet channels and outlet channels (in the Fig. 7 associated with flow arrows).
  • For an automated sampling with subsequent processing and removal to a connected analyzer are in the FIG. 7 all components shown. It was dispensed with the representation of the control unit for separate control of the chambers and a sectional view of the three plates.
  • a sample of substance can be aspirated when inlet channel (707) and outlet channel (708) are connected to a reactor.
  • inlet channel (707), suction valve (704), pumping chamber (702), pressure valve (705) and outlet channel (708) of the pump (700) a constant amount of substance can be pumped out of the reaction vessel.
  • the controller switches so that pressure valve (705) closes and valve (706) opens and a defined amount of substance is transferred through the outlet channel of the valve (706) into the mixing chamber (701) with the known pumping chamber volume.
  • the pump (700 ') starts to also generate a pump circulation to the mixing chamber.
  • the inlet channel of the valve (704 ') and the outlet channel of the valve (705') is connected to the mixing chamber.
  • the pump (700) can now, in parallel to the put into operation Umpumpniklauf the mixing chamber, via inlet channel (709) and valve (703) while the valve closed (704) promote an additional diluent in the mixing chamber, which is mixed with the substance sample there .
  • the diluted substance sample becomes a possible Analyzer promoted.
  • the valve (705 ') closes and the valve (706') opens. Due to the sum of all feeding pump strokes to the mixing chamber, the treated sample can be discharged via outlet channel (710) with the same number of strokes and conveyed for analysis.
  • the inlet channel (709) is extended to the valve (703 '), so that also the second pump can be flushed after the sample transport with diluent, when corresponding valves are switched.
  • the delivery and removal device has a low dead space volume.
  • This small dead space volume is necessary so that the analysis result is not falsified by old substances due to deposition and aging of the substances removed, the product-loaded channels are not blocked and a high operational availability is given.
  • the conveying device allows an exact sampling and a user-related volumetric delivery of liquids, gases, or liquefied compressed gases. It is particularly advantageous for this purpose, because the stroke volume of the pump head is easily adaptable to operational requirements, especially when pump chambers are equipped with adjustable disc for a Generalhub ceremonies.
  • the membrane pump / conveyor device is operated by means of a decentralized electro-pneumatic control unit which is provided with a sufficient number of connection options for controlling all required pumping and shut-off chambers.
  • the combination of at least one pumping and associated shut-off chambers with dwell, mixing and separation chambers and task-specific sensors offers the possibility of forming small and compact functional units that measure, treat, process and analyze their properties with liquid or gaseous substances.
  • the functional units have small dimensions and can therefore be easily integrated in analytical and medical devices. It is particularly advantageous that only small dead space volumes are present and only small amounts of substance are processed.
  • a decentralized electro-pneumatic control unit as in Fig. 1 But also allows a synchronous control of several pump heads.
  • the parallel operation of several pump heads with only one control unit allows the economical use of the membrane pump / conveyor according to the invention, for example in filling or bottling.
  • the invention therefore also relates to filling plants or filling devices which contain at least one membrane pump according to the invention.
  • a decentralized electro-pneumatic control unit also allows a staggered control of individual pump heads, so that a reduced pulsation occurs in the parallel operation of several pumps.
  • the inventive diaphragm pump with decentralized electro-pneumatic control unit and adjustable disc in the control chamber of the pumping chamber is an economical use with low investment costs possible. This is particularly visible when changing tasks require different sized flow rates that can not be covered with a pump head type. With different flow rates, only the pump head needs to be replaced while the control part remains unchanged. The replacement of the pump head is done by simply disconnecting the pneumatic control lines.
  • the control for conveying with the diaphragm pump is preferably carried out so that a delivery stroke consists of at least four individual successive control steps and each control step is separated with an intermediate or associated constant or variable timer for subsequent control step and the conveyor or Dosing the pump can be varied by changing at least one timer.
  • the timers interwoven between the control steps ensure that the pneumatically triggered substeps of the pumping stroke are carried out accurately and completely and that the individual steps are reproducible.
  • the synchronous modification of all timing elements for regulating the delivery rate ensures a simple, user-friendly handling of the pump.
  • the timing elements T belonging to the control are preferably 0.001 seconds to 100 seconds, preferably the range is between 0.03 seconds to 30 seconds, and more preferably the timer is 0.03 seconds to 10 seconds.
  • the timers ensure that the fast electronic control signals (signal transit time) do not prematurely discontinue the slower pneumatic operations to deflect the diaphragms and thereby the hydraulic displacement operations on the product contacted side of the diaphragm.
  • the fluid dynamic processes take more time than the electronically triggered signals of the controller.
  • the dosing cycle preferably consists of at least four control steps and has at least two different timers, of which only one timer is variable and is used to regulate the pumping cycle.
  • the pneumatic opening and closing operations of the diaphragms in the shut-off chambers can be provided with a non-adjustable smaller timer and a variable timer can be used for the open / close circuit of the central larger pumping chamber.
  • Each timer is in a particularly preferred mode of operation greater than the required switching time of the associated electro-pneumatic multi-way valves in the control unit.
  • the associated timer for the diaphragms of the shut-off chambers is 0.01 to 0.15 seconds and preferably 0.01 to 0.075 seconds, and more preferably 0.01 to 0.05 seconds.
  • At the electronic and the electro-pneumatic control unit preferably at least two diaphragm pumps are connected in parallel.
  • An electro-pneumatic control unit can control a number of diaphragm pumps in parallel, so that the pumps, with optionally different large pumping chambers, can synchronously dose different substances in different amounts at the same time.
  • the thickness of the elastic membrane is preferably greater than 0.1 mm and less than 5 mm and the height of the pumping and shut-off chamber in the region of the vertex of the chamber (maximum extent over the membrane) is less than 10 times the membrane thickness, preferably less than 5 times the membrane thickness used.
  • the concave depressions in the plates may have different geometric shapes, e.g. that of a cylinder, a sphere section or a truncated cone.
  • a variant of the diaphragm pump or of the pump head preferably consists of a pneumatically controlled pumping chamber combined with two solenoid-operated valves as shut-off chambers.
  • the membranes used in the membrane pump or in the pump head are preferably designed to be larger in diameter than the diameter formed by the chambers in the parting plane of the plates, and more preferably the membrane diameter is at least 20% larger.
  • metallic membranes are used as pumping membrane and inserted or inextricably connected by welding with one of the plates, in particular an outer plate.
  • a pulsation damper is mounted downstream of the pressure-side shut-off chamber, in particular in the region of the outlet channel of the diaphragm pump or of the pump head.
  • the diaphragm pump or the pump head is equipped with an integrated spring-loaded overflow valve in order to produce an internal product circuit in the pump head. If the connected control pressure is greater than the desired pump pressure, an integrated expansion possibility is created from the pump pressure side to the pump suction side.
  • At least two pump units consisting of two pump chambers with associated four shut-off chambers for forming a pump set are arranged side by side in the three rigid plates.
  • the invention also relates to a pump set consisting of two or more membrane or double diaphragm pumps, wherein the diaphragm pumps according to the invention have a common control unit.
  • the present invention relates to a diaphragm pump, which is used as a controllable multi-channel diaphragm valve consisting of three plates, characterized in that a distribution chamber having an inlet channel via a connecting channel has a single upstream controllable valve and at least one shut-off chamber having a Outlet channel has, is connected and the chambers have the same size recesses and are separately controllable, so that for the passage of a substance at least two chambers and the upstream valve must be opened simultaneously in the desired flow direction, and timed all chambers of a decentralized electro-pneumatic control unit be operated.
  • an enlarged pumping or distribution chamber is provided, so that the liquid quantity to be distributed is conveyed with pumping strokes in each case.
  • the diaphragm pump according to the invention is suitable as a multi-channel diaphragm valve, as it has a compact design, smallest dead spaces and due to the small control rooms low switching times to order from the OPEN position in the ZU- To get a position.
  • the membrane pump according to the invention can be used as a multi-channel distributor valve or the multi-channel distributor pump to pass more than two different liquids sequentially to a plurality of delivery points.
  • at least two shut-off chambers are connected to different fluid supplies, so that a distribution over the central distribution chamber (pumping chamber) to a plurality, at least more than two shut-off chambers with associated outlet channels is possible.
  • three chambers are opened for the sequential fluid passage.
  • at least two chambers of the multi-channel distribution valve are closed ( Fig. 6a ).
  • the fluid distribution can be done by means of the pump control or alternatively with a timed distribution.
  • the diaphragm pump according to the invention is used as a multi-channel distributor valve for the distribution of at least two different fluids to a plurality of consumers, it is also possible to speak of sending and dispensing shut-off chambers.
  • the diaphragm pump for the dosing of very small quantities of liquid substance whose volume per pump stroke is significantly below the specific droplet size. Due to the rapid application of the pneumatic conveying energy to the control side of the delivery membrane of the pumping chamber or the Absperrhuntmembranen the sucked product volume in the pumping chamber from the product spaces of the chambers and the Auslasskahal is thrown out and there is no so-called collecting drops at the discharge point of the pump. As a result, a dosage of small amounts of liquid in a reaction mixture is not delayed in time and a synthesis process is started synchronously with the dosage.
  • the metering of small amounts of substance against pressure is very easy to carry out, since the membranes of the shut-off chambers and the pumping chamber are elastic and close the incoming and outgoing product channels in the CLOSED position of the chambers gas-tight, so that via the gas phase of a connected pressure vessel no substance on the Outlet side of the pump head is pushed back to the inlet side of the pump and the suction at normal pressure is not interrupted.
  • an exact dosing of small amounts of liquid in an evacuated process plant is possible.
  • Another advantage over the prior art is that due to the small dead space and the dense shut-off and pumping chamber a sensitive product to be dosed without a large residence time and backmixing is supplied to the destination.
  • the pump in comparison to the microstructure technology offer advantages. Due to the large channel dimensions in relation to the dosing volume, the pump is less susceptible to contamination. A contamination caused by product contamination, which is manifested by an increasing dosing error, or can lead to failure of the pump, is greatly reduced due to the large product channels. Product contaminants may be flushed through the relatively large product channels during dosing.
  • the extremely low dead space volume ensures good intake behavior and rapid reproducible dosing, especially in applications involving new pharmaceutical substances. which are only available in small quantities in the early development stage. There are further advantages in applications in medical technology and in diagnostics.
  • Adjusting small liquid flows is particularly easy. It is possible by means of the adjustable disc to change the stroke volume roughly and additionally make an extreme fine adjustment on the time axis with an intermediate timer in the controller. As a result, volume flows can be changed very easily without counter-checking.
  • the lamellar structure of the diaphragm pump with integrated controllable valves can be designed as a double or multi-diaphragm pump to substantially equalize the occurring due to the pumping principle pulsating metering.
  • the pump diaphragm and the controllable valves are actuated directly electrically (supply voltage, for example, 6 or 12 volts).
  • supply voltage for example, 6 or 12 volts
  • the electrical supply of the controller then takes place in mobile applications directly via a battery or a fuel cell, so that over a long time the control unit remains functional.
  • the power supply for operating the diaphragm pump according to the invention opens up the use in medical technology by z .B. to allow a constant drug delivery and the recipient is still mobile.
  • Another mobile use of the membrane pump according to the invention with pneumatically operated working membrane for the promotion of liquid substances is carried out with a portable two-chamber compressed air reservoir, which may be made of plastic, for reasons of weight.
  • the diaphragm pump according to the invention whose pump and valve chambers have a small control chamber volume, can be supplied with compressed air via the one chamber of the compressed air reservoir for a long time, so that the second chamber of the compressed air reservoir can be used for the storage of e.g. can be used to be applied liquid substance.
  • the inventive diaphragm pump lends itself to mobile applications, for example in the application of pesticides in difficult terrain.
  • FIG. 1 a diaphragm pump with pump head (200) in cross section with associated control (100) and housing and pneumatic distributor (115) is shown.
  • a movable disc (1001) has been used with one side attached rod to allow the outside of the manual axial adjustment of the disc.
  • the housing contains electronic components and a freely programmable electrical control.
  • a power supply, not shown, is used to supply power to the electronic components.
  • the housing has a display (101), an on / off switch (102) and a plurality of function buttons (103 to 109), with which required parameters for the pumping sequence or for the pumping process can be entered, visually tracked and stored.
  • the electronic control (100) allows different operating variants, so that with the button (103) on continuous operation and with a button (104) can be switched to discontinuous operation of the pump.
  • the discontinuous operation of the pump can be adjusted by a preselectable number of pump strokes and stored with buttons (105) in the controller.
  • the button (106) is a reduction of the set parameters, the button (107) is provided for increasing the variable parameters, which could then also be stored with the button (105) as newly selected operating parameters of the diaphragm pump in the controller.
  • the time constants can be changed with buttons (106, 107).
  • the button (108) allows the choice between internal and external control, for example from an external process control system.
  • the pumphead (200) will start to operate when the button (109) is pressed, and if the button (109) is pressed again, the operation will be stopped again.
  • the programmable controller electronics at the beginning of dosing, send electrical signals via electrical connection cables (110) to the multi-path electro-pneumatic valves (111, 112, 113, 114), which then move to their defined open or closed position (Table 1) switch.
  • the electro-pneumatic multi-way valves (111 to 114) are mounted on a pneumatic manifold block (115).
  • the manifold block has two supply channels (116, 117).
  • the supply channel (116) is directly connected to the compressed air supply and the distribution channel (117): is connected by a line to the vacuum supply.
  • the vacuum is generated by the vacuum generator (118) installed in the bypass, an injector, which is constantly supplied with compressed air by the valve (114) when the electrical control is switched on.
  • an injector which is constantly supplied with compressed air by the valve (114) when the electrical control is switched on.
  • the freely programmable control of the pneumatically operated diaphragm pump with pump head (200) switches the electro-pneumatic multi-way valves (111 to 114) and directs the pressure in the manifold (115) pending pneumatic pressure in the channel (116) (pressure channel) or the vacuum in the distribution channel (117) (Vacuum channel) through the control lines (capillaries or hoses) (119, 120, 121) on the pneumatic control chambers (pneumatic chambers) (220, 221, 222) in the pump head (200).
  • the valve (111) is connected to the suction valve (lower shut-off chamber (210) of the pump head (200) through the control line (119).)
  • the other valve (112) upper shut-off chamber (212)) and valve (113) are the same. connected to the pump chamber (211) of the pump head (200)
  • the valve (114) constantly supplies the vacuum generator with compressed air and is switched immediately as soon as the electronics are supplied with electrical voltage.
  • the diaphragm pump head (200) consists of the three partial plates (201, 203, 205) and has inserted elastic membranes (202, 204) which are pneumatically deformable in the area of the pumping chamber (211) and shut-off chambers (210, 212).
  • the membranes (202, 204) are slightly smaller than the plates (201, 203, 205) to ensure a good seal with the atmosphere.
  • recesses are recessed, which form the pumping or shut-off chambers (210, 211, 212), wherein the respective compensating volume of the shut-off chambers (210, 212) in the plate (201) is introduced.
  • the pumping chamber (211) is incorporated with a small volume balance volume in the plate (205) and with the larger pump volume fraction in the middle plate (203).
  • shut-off chamber (210) is e.g. named the controllable intake valve of the pump head.
  • the pumping chamber (211), the delivery chamber and the shut-off chamber (212) is the controllable pressure valve of the pump head.
  • the diaphragms (202, 204) divide the pumping and shut-off chambers into control spaces (220, 221, 222) and product spaces (230, 231, 232).
  • the pumping or shut-off chambers (210, 211, 212) are in the form of spherical sections on one half and cylinders on the opposite pane.
  • the middle plate (203) has an intake passage (207) and an exhaust passage (206). Both channels (206, 207) are each extended with a welded capillary.
  • the channels (209, 208) interconnect the product spaces (230, 231, 232) of the chambers (210, 211, 212).
  • the pumping chamber (211) has a groove (213) as a connecting element from the lowest geometric point of the depression in the plate to the outlet opening or to the connecting channel (209). It is also clarified that between the inlet channel (208) and the beginning of the outlet channel (209) with the connecting groove (213) is still a sufficiently large distance to allow a tight closure of the openings in the product space of the pumping chamber through the membrane (204).
  • the pump head (200) is shown here in control step 4 (see Table 1).
  • the membrane (202) on the control chamber side (220) is pressurized, so that the membrane (202) the suction passage (207) at the inlet (240) ( Fig. 2 ) and the connecting channel (208) at the outlet (241) ( Fig.2 ) blocked.
  • the associated control chamber (221) is subjected to a vacuum, so that the actively active membrane area abuts against the disc (1001) and opens the supply and discharge connecting channel (208, 209).
  • the shut-off chamber (212) is also supplied with a vacuum on the control side so that the connecting channel (209) and the outlet channel (206) are open in order to displace the liquid volume from the pumping chamber in the following control step 5 (see Table 1). It can be seen that the respective membrane movement extends over the entire height of the depression. In Fig. 1 required screws for the contraction of the releasable plates and simultaneous pressing of the inserted membranes are not shown.
  • the order of the programmable control steps and the position of the valves (111 to 114) are shown in Table 1 below. It means as digital signal “1" compressed air pending (result: membrane is pressed against the plate (203) and closes) and the signal "0" vacuum pending (diaphragm is raised in the control room and opens).
  • the electronic control is supplied with electrical voltage and switched on with the button (102)
  • the programmed control switches the valves (111 to 114) into a defined start or home position.
  • the control of a complete pump stroke consists here, for example, of five individual steps. If the pumping process is interrupted or terminated, the control jumps to the start or home position.
  • step (111) Suction valve (113) displacer (112) Pressure valve (114) Vacuum initial position 1 1 1 1 1 Step 1 0 1 1 1 2nd step 0 0 1 1 3rd step 1 0 1 1 4th step 1 0 0 1 5th step 1 1 0 1 Back to step 1
  • a variable timer is programmed for each control step 1-5 and assigned (not shown in Table 1), so that the individual consecutive control steps are not mutually influenced and executed completely.
  • the switching times of the electro-pneumatic valves are larger and thus much slower than the time required to send the digital signals.
  • the intermediary of the timers, the pumping function according to the control cycle 1-5 (see Table 1) is reproducibly and completely stirred.
  • Fig. 2 is a pump head (200) consisting of the plates (201, 203, 205) shown in a sectional view. Evident are the clamped in the parting planes of the plates elastic membranes (202, 204), and the shut-off chambers and the pumping chamber with the associated recesses in the middle and the outer plates.
  • the outer plate (205) is made thicker, so that the control chamber (221) is enlarged beyond the associated compensation volume.
  • the control chamber is also extended by a smaller cylindrical recess (1000) and a threaded hole that is led to the outside.
  • the stepped disc (1001) is installed with a cylinder on one side, in which a remote threaded rod (1002), which is moved by the outer plate, is fastened, so that the outer knurled nut (1003) fastened on the threaded rod (1002) is already rotated slightly ), the disc (1001) moves axially in the control chamber or moves.
  • the threaded rod is offset and releasably secured by two pins (1004) with the receiving cylinder of the disc.
  • a seal (1005) is positioned to to seal the control chamber, which is pressurized with pneumatic pressure, to the outside.
  • the disc (1001) is provided with a plurality of bores (1007) and a concentrically raised ring (1008) to promote pressurization of the entire control space and to prevent closure of the bore (1006) upon full recovery of the disc.
  • the adjustable disc has the contour of a spherical section and is thus adapted to the contour of the process-side recess.
  • the disc (1001) can be axially displaced even with a slight manual rotation of the knurled nut (1003), thereby changing the membrane path which at the same time determines the volume of fluid to be delivered.
  • Fig. 2a and Fig. 2b show further embodiments, in particular different contours of the movable disc.
  • the membrane-side contour of the disc (1001 ') in Fig. 2a is even while the contour of the disc (1001 ") in 2b shows a blunt cone.
  • the two figures show that the disc with one-sided cylinder and directly machined threaded rod is to be manufactured in order to reduce the number of components, costs and assembly work as possible.
  • Fig. 2c shows a further embodiment of the movable disc (1001 "') with the disc contour adapted to the pumping chamber The disc is bored on one side so that the control line can be connected directly to the disc and the power connector (1006) in the plate (205) eliminated.
  • FIG. 3 By way of example, the chambering of a pumping membrane (204) is shown in a sectional view. In the upper part of the figure, the chambered chamber (204) is not in the working state, while in the lower part of the figure, the control chamber (221) of the membrane (204 ') is pressurized and it comes to the deflection of the membrane. It can also be seen that the membrane between the plates (203, 205) is clamped and in the plate (203) parts of the connecting channels (208, 209) are present. The pumping membrane is clamped in the outer region between the plates, while in the center of the membrane is open, so that on both sides chamber elements (1100, 1101) can be attached. The chamber members have towards the elastic membrane a raised rounded concentric outer ring (1102, 1103), so that during the screwing together of the chamber elements, the enclosed membrane surface is no longer subjected to force.
  • the contour of the process-side chamber element (1104) of the depression contour is adapted so that the dead space volume of the pumping chamber does not increase significantly. If the product-side chamber element is provided or coated with an elastic film (1105), then the connection channels can be sealed in the loaded membrane state.
  • the degree of deformation due to the small deflection which is to be regarded as a function of the membrane diameter, is negligible.
  • membrane materials that would be less suitable due to the high permanent deformation.
  • Fig. 3b schematically a diaphragm pump, consisting of three plates (201, 203, 205) is shown, in particular it can be seen that connecting channels (208, 209) and portions of the supply and outlet channel (207, 206) are at an angle ⁇ , so at fast changing flow conditions no large pressure losses occur.
  • a double diaphragm pump with controllable valves is shown, which consists of three plates and all pumping and shut-off chambers have been introduced in the middle plate.
  • the inlet channel (300) is T-shaped and connects the left and right suction-side shut-off chambers (301, 301 '), so that both shut-off chambers have a common inlet channel.
  • From each shut-off chamber extends an angled connecting channel (302, 302 ') to the pumping chamber (303, 303'). Almost mirror-inverted to the inflow area, the downstream outflow area of the double diaphragm pump is designed.
  • connection channels (304, 304 ') connect the pumping chambers (303, 303') to the shut-off chambers (305, 305 ') on the outlet side, and the shut-off chambers of the outlet side are connected to a common outlet channel (306).
  • a double-diaphragm pump is described, with a split internal passageway.
  • the double diaphragm pump is equipped in this example with movable discs (1001) for a possible partial lift operation. In the FIG. 3a If no detachable connection elements of the plates are shown, the pump head is not in working condition.
  • the flow direction of the double diaphragm pump is indicated by arrows.
  • FIG. 4a Figure 4 shows the front views of a middle plate (plate 400) in which four shut-off chambers (1200, 1201, 1202, 1203) are associated with a diaphragm chamber (1205).
  • the chambers are formed by depressions with the shape of a spherical segment (calotte).
  • each Shut-off chambers has a connecting channel (1206) to the central pumping chamber (1205), in addition, two shut-off chambers with a separate inlet channel (1207, 1208) and two shut-off chambers with a separate outlet channel (1209, 1210) are provided.
  • two different substances may be delivered sequentially or alternately with a pump head.
  • the second inlet channel could also be used to pump a cleaning fluid and initiate a flushing process.
  • An alternative use of the second inlet channel is when a vapor connection is realized and thereby at any time a sterilization process could be initiated.
  • the inlet channel (1207) may be connected to a supply line for a substance to be metered. The substance passes into the pumping chamber (1205) during the suction process to then be pushed through the blocking chamber (1202) into the outlet channel (1209). A sterilization process requires a vapor port at the inlet port (1208). The steam could pass through the shut-off chamber (1201) into the pumping chamber (1205) to then pass through a connecting channel to the shut-off chamber (1203) and to the outlet channel (1210).
  • FIG. 4 there is shown an angled collecting groove (1215) in the pumping chamber (1205) and bores (1216) for receiving tie rods or releasable fasteners with which all three plates can be secured.
  • the Fig. 4 Visibly shows the pumping chamber, connecting channels (eg 1206) and a groove (1215) for better product discharge from the pumping chamber.
  • Fig. 4a Visibly shows the shut-off chambers with inlet and outlet openings.
  • a chamber interconnection is shown schematically, wherein a pumping chamber (1205) and six shut-off chambers (eg 1200), which are shown in the figure as a circle, and with associated inlet channels (1207, 1208, 1213) and outlet channels (1209, 1210, 1214) are linked. Due to the separate control of each individual chamber, a plurality of different fluid streams can be interconnected sequentially or alternately via a common pumping chamber (1205) to all available outlet channels.
  • a pumping chamber with more than three shut-off chambers and the corresponding inlet and outlet channels can be used for an automated sampling system.
  • a pumped circulation in the bypass can be generated.
  • the outlet channel (1209) and the outlet channel (1210) close, so that a sufficiently large amount of substance
  • the pumping chamber is cleaned via the inlet channel (1208) with an inert rinsing agent, whereby the cleaning liquid can be drained off separately via the outlet channel (1214).
  • the inlet channel (1213) is provided by way of example for a final sterilization procedure after completion of the reaction.
  • Fig. 5 is a diaphragm pump as Mehrwege- distribution valve, consisting of three plates in analogy to the pump structure shown. Furthermore, it can be seen that elastic membranes (1303, 1304) are clamped between the plates (1300, 1301, 1302) and thereby divide introduced depressions in the middle plate into a product and a control space. In this illustration, the control chambers of the chambers are not expanded, so that the membranes in the separation area on the outer plates are tight.
  • pneumatic connection connections (1305, 1306, 1307) are indicated by double arrows.
  • the distribution valve is shown in the open state, so that, for example, the elastic membranes deflected by an applied pneumatic pressure and thereby close the connection channels.
  • FIG. 5 A multi-way distribution valve is shown having a central inlet channel (1308) in the outer plate (1300), followed by a connecting channel (1309) to the distribution space (1310).
  • the distribution chamber has two connection channels (1311, 1312) to smaller shut-off chambers (1313, 1314), which in turn have outlet channels (1315, 1316) for fluid discharge.
  • a connected electro-pneumatic control unit has to control at least two chambers in order to release a switching path for the passage of a substance.
  • the multi-way diverter valve may selectively direct a supply of material to the left exhaust passage (1315) or the right exhaust passage (1316).
  • both outlet channels can be opened simultaneously, so that a parallel distribution is possible.
  • the electro-pneumatic control unit does not need a vacuum generator because fluid supplies usually have an outlet pressure.
  • the connecting channels are incorporated on one side into the surface of the plate (1301), so that at the same time all connecting channels are sealed with each other and to the outside through the inserted large-area membrane. Therefore, multi-way distributor valves in the parting planes of the plates are preferably provided with full-surface elastic films to simplify assembly and, in the case of cleaning, simplify operations. Due to the central feed of a substance to be distributed, is in the elastic film (1303) provided a circular opening, so that the inlet channel (1308) and connecting channel (1309) have a flow-through connection.
  • Distribution and shut-off chamber are pneumatically with e.g. Compressed air or hydraulically controllable with liquid.
  • electromagnetic drives can also be used.
  • the plates of the multi-way distribution valve are detachably connected to each other.
  • Fig. 6 is the middle plate of a multi-way distribution valve shown schematically.
  • a central fabric inlet channel (1308 ') with a distribution chamber (1310') and a plurality of connecting channels (1312 ') with associated shut-off chambers (1314') and subsequent outlet channels (1316 ').
  • a fluid may be passed sequentially or in parallel to a plurality of consumers, with two chambers always having to be switched to an open state.
  • a pump connection for sampling and preparation is shown.
  • Two diaphragm pumps (700, 700 ') according to Fig. 4 were combined with a mixing chamber (701) so that all functional parts are incorporated in three, but enlarged, pump plates.
  • the diaphragm pumps have a pumping chamber (702, 702 ') and each pumping chamber has four associated shut-off chambers (703, 704, 705, 706 and 703', 704 ', 705', 706 ').
  • the shut-off chambers are each associated with inlet channels and outlet channels (indicated in the figure with flow arrows).
  • For an automated sampling with subsequent processing and removal to a connected analyzer are in the FIG. 7 all components shown. It was dispensed with the representation of the control unit for separate control of the chambers.
  • a sample of substance can be aspirated when inlet channel (707) and outlet channel (708) are connected to a reactor.
  • inlet channel (707), suction valve (704), pumping chamber (702), pressure valve (705) and outlet channel (708) a constant amount of substance can be pumped out of the reaction vessel.
  • the controller switches so that pressure valve (705) closes and valve (706) opens and a defined amount of substance is transferred through the outlet channel of the valve (706) into the mixing chamber (701) with the known pumping chamber volume.
  • the pump starts (700 ') to also produce a pumped circulation to the mixing chamber.
  • the inlet channel of the valve (704 ') and the outlet channel of the valve (705') is connected to the mixing chamber.
  • the pump (700) can now, parallel to the put into operation pumping circulation of the mixing chamber, via inlet channel (709), and valve (703) with simultaneously closed valve (704) promote an additional diluent in the mixing chamber, which is mixed with the substance sample there .
  • the diluted substance sample is conveyed to a possible analyzer.
  • the valve (705 ') closes and the valve (706') opens. Due to the sum of all feeding pumping strokes to the mixing chamber, the treated sample can be discharged via outlet channel (710) with the same number of strokes and, if necessary, conveyed for analysis.
  • the inlet channel (709) is extended to the valve (703 '), so that also the second pump can be flushed after the sample transport with diluent, when corresponding valves are switched.
  • Fig. 8 schematically two plates 800, 801 are shown with clamped elastic membrane 802.
  • the plate 800 the product-side pumping chamber 800 'and in the plate 801, the control chamber 801' of the pumping chamber is indicated.
  • the diaphragm movement or diaphragm deformation always takes place between the limiting wall of the control chamber and the limiting wall of the pumping chamber, so that the maximum movement of the diaphragm is predetermined by the contours of the chambers.
  • the clamped in the plates and pneumatically actuated membrane (chord length 807) can deform up to the chamber height 804 and thereby assumes the arc length 803.
  • the expansion of the membrane takes place up to the chamber height 806 with the arc length 805, so that the membrane is significantly more deformed relative to the chord length than in the first load case.
  • Larger membrane deformations cause a plastic wrinkling, so that the individual delivery stroke and thus the important displacement volume reduced by forming wrinkles.
  • the wrinkling of the membrane prevents the tight closing of the feeding and discharging channels in the pump and shut-off chambers.
  • the dosing head is adjusted with a movable disc (1001) in the basic position so that the membrane is not deformed.
  • the membrane path in the predetermined geometry space of the pumping chamber can then be reduced by adjusting the movable disk (1001).
  • the design with regard to membrane deformation relates primarily to the product-side chamber contour.

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Claims (10)

  1. Tête de pompe en plusieurs parties, comportant au minimum trois plaques rigides (201, 203, 205) et au moins deux membranes élastiques (204, 202) disposées entre ces plaques (201, 203, 205), les plaques (201, 203, 205) formant au moins une chambre de pompage (211) et au moins deux chambres d'obturation (210, 212) présentant notamment la géométrie d'une section sphérique, d'une zone sphérique, d'un cylindre ou d'un cône tronqué et comportant chacune une ouverture d'entrée (240) et une ouverture de sortie (241) pour le produit à refouler, et la chambre de pompage (211) et les chambres d'obturation (210, 212) formant, avec un canal d'entrée (207), les canaux de connexion (208) et (209) ainsi qu'un canal de sortie (206), un canal de passage, la chambre de pompage (211) et les chambres d'obturation (210, 212) étant chacune divisées par les membranes (204, 202) en un compartiment de produit (230, 231, 232) et un compartiment de commande (220, 221, 222), et les compartiments de commande (220, 221, 222) présentant des conduites de commande (119, 120, 121) connectées à une unité de commande (100, 115), caractérisée en ce que la plaque extérieure (205) est configurée de manière à recevoir le disque mobile, suite à quoi le compartiment de commande de la chambre de pompage est agrandi et un disque axialement mobile (1001) pourvu d'une tige allongée apposée d'un côté (1002) est inséré dans celui-ci, de sorte que la tige apposée d'un côté du disque mobile est allongée jusqu'à l'extérieur de la tête de dosage et peut être réglée manuellement (1003) à l'extérieur de la pompe et que de ce fait le disque (1001) se trouvant dans le compartiment de commande est mu axialement et réduit ou agrandit la course de membrane maximale réglée dans la chambre de pompage, de sorte que le volume de liquide dosé est variable par course de refoulement et la pompe fonctionne dans un mode de course partielle sans que le volume de compartiment mort dans le compartiment de produit soit modifié, la surface du disque mobile est légèrement plus petite que la surface de la membrane active pour le refoulement et l'écartement moyen de l'entrée respectivement contiguë et de la sortie de chaque chambre de pompage et d'obturation soit de deux à dix fois égale au plus grand diamètre hydraulique de l'ouverture d'entrée (240) ou de sortie (241) respective.
  2. Pompe à membrane selon la revendication 1, caractérisée en ce qu'il s'agit d'une pompe à double membrane qui est constituée de trois plaques et où toutes les chambres de pompage et d'obturation ont été logées dans la plaque médiane.
  3. Pompe à membrane selon la revendication 1 ou 2, caractérisée en ce que, dans la plaque médiane, au moins trois, de préférence quatre chambres d'obturation (1200, 1201, 1202, 1203) sont attribuées à une chambre de pompage à membrane (1205).
  4. Pompe à membrane selon l'une ou plusieurs des revendications 1 à 3, caractérisée en ce que le disque mobile (1001) à tige allongée (1002) est pourvu d'un entraînement pneumatique, électrique, hydraulique ou piézo adapté, pour un réglage à distance automatisé de la course partielle par mouvement de rotation ou de montée-descente.
  5. Pompe à membrane selon l'une ou plusieurs des revendications 1 à 4, caractérisée en ce que les sections de connexion ou de séparation des canaux d'entrée et de sortie sont inclinés.
  6. Pompe à membrane selon l'une ou plusieurs des revendications 1 à 5, caractérisée en ce que plusieurs canaux d'entrée ou de sortie à chambres d'obturation sont attribués à une chambre de pompage, et une chambre de mélange destinée à recevoir une quantité partielle d'échantillon est prévue dans au moins un canal de sortie, et une deuxième chambre de pompage comportant plusieurs canaux d'entrée et de sortie et compartiments d'obturation est attribuée à la chambre de mélange pour repomper la quantité partielle d'échantillon recueillie dans la chambre de mélange, de telle façon qu'en cas d'amenée d'un diluant séparé dans la chambre de mélange, l'échantillon qui s'y trouve peut être dilué ou mélangé, afin de prélever par pompage et d'analyser l'échantillon dilué après le mélange.
  7. Pompe à membrane selon l'une ou plusieurs des revendications 1 à 6, caractérisée en ce que ladite pompe est constituée de trois plaques et peut être utilisée comme vanne de distribution à plusieurs voies.
  8. Utilisation de la pompe à membrane selon l'une ou plusieurs des revendications 1 à 7 comme dispositif de refoulement ou comme système de prélèvement d'échantillon ou dans des dispositifs de remplissage et installations de remplissage.
  9. Utilisation de la pompe à membrane selon la revendication 8 comme vanne de distribution à plusieurs voies, caractérisée en ce que celle-ci est constituée d'un canal d'entrée de matière (1308') comportant une chambre de distribution (1310') et d'une multitude de canaux de connexion (1312') comportant des chambres d'obturation attribuées (1314') et de canaux de sortie (1316') consécutifs.
  10. Utilisation d'une pompe à membrane selon la revendication 9, caractérisée en ce que les chambres présentent des évidements de même taille et sont pilotables séparément de sorte que, pour le passage d'une matière, au moins deux chambres doivent être ouvertes en même temps dans le sens d'écoulement souhaité, et toutes les chambres sont actionnées depuis une unité de commande décentralisée.
EP04724563A 2003-04-10 2004-03-31 Pompe a membrane Expired - Lifetime EP1611355B9 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04724563T PL1611355T3 (pl) 2003-04-10 2004-03-31 Pompa membranowa

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10316395A DE10316395B4 (de) 2003-04-10 2003-04-10 Membranpumpe
PCT/EP2004/003378 WO2004090334A1 (fr) 2003-04-10 2004-03-31 Pompe a membrane

Publications (3)

Publication Number Publication Date
EP1611355A1 EP1611355A1 (fr) 2006-01-04
EP1611355B1 EP1611355B1 (fr) 2010-10-20
EP1611355B9 true EP1611355B9 (fr) 2011-02-23

Family

ID=33103301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04724563A Expired - Lifetime EP1611355B9 (fr) 2003-04-10 2004-03-31 Pompe a membrane

Country Status (8)

Country Link
EP (1) EP1611355B9 (fr)
AT (1) ATE485448T1 (fr)
DE (2) DE10316395B4 (fr)
DK (1) DK1611355T3 (fr)
ES (1) ES2354864T3 (fr)
PL (1) PL1611355T3 (fr)
PT (1) PT1611355E (fr)
WO (1) WO2004090334A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005035502A1 (de) * 2005-07-26 2007-02-01 Mingatec Gmbh Kolben-Membranpumpe
DE102008043309A1 (de) * 2008-10-30 2010-05-06 Robert Bosch Gmbh Membranpumpe mit einem mehrteiligen Pumpengehäuse
DE102009038492A1 (de) * 2009-08-21 2011-02-24 Bürkert Werke GmbH Dosiereinheit
JP7150726B2 (ja) * 2016-12-21 2022-10-11 フレセニウス・メディカル・ケア・ドイチュラント・ゲーエムベーハー 膜ポンプデバイスおよび膜ポンプデバイスと作動デバイスとを有する膜ポンプ
DE102016015207A1 (de) * 2016-12-21 2018-06-21 Fresenius Medical Care Deutschland Gmbh Betätigungseinrichtung und Verfahren zum Betreiben einer Betätigungseinrichtung sowie Membranpumpe mit einer Betätigungseinrichtung und einer Membranpumpeneinrichtung und eine Blutbehandlungsvorrichtung mit einer Membranpumpe
CN111534411A (zh) * 2020-04-03 2020-08-14 利穗科技(苏州)有限公司 一种交替切向流罐装培养装置及其控制方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2391703A (en) * 1943-03-06 1945-12-25 Infilco Inc Proportioning pump
DE1528459A1 (de) * 1965-01-22 1970-07-30 Licentia Gmbh Dosierpumpe fuer Fluessigkeiten oder Gase
GB1311901A (en) * 1970-04-15 1973-03-28 Bertil Nystroem Ernst Holger Membrane pump
CH608115A5 (fr) * 1975-07-04 1978-12-15 Welp Microbox Dr Gmbh & Co
EP1072868A1 (fr) * 1999-07-09 2001-01-31 Sawatec Ag Dispositif de dosage de liquides
DE10216146A1 (de) * 2002-04-12 2003-10-30 Bayer Ag Membranpumpe

Also Published As

Publication number Publication date
WO2004090334A1 (fr) 2004-10-21
DE502004011798D1 (de) 2010-12-02
DE10316395B4 (de) 2008-04-17
PT1611355E (pt) 2011-01-19
DE10316395A1 (de) 2004-11-04
DK1611355T3 (da) 2011-01-31
EP1611355B1 (fr) 2010-10-20
PL1611355T3 (pl) 2011-04-29
ES2354864T3 (es) 2011-03-18
ATE485448T1 (de) 2010-11-15
EP1611355A1 (fr) 2006-01-04

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