EP1353069A2 - Membranpumpe - Google Patents
Membranpumpe Download PDFInfo
- Publication number
- EP1353069A2 EP1353069A2 EP03006884A EP03006884A EP1353069A2 EP 1353069 A2 EP1353069 A2 EP 1353069A2 EP 03006884 A EP03006884 A EP 03006884A EP 03006884 A EP03006884 A EP 03006884A EP 1353069 A2 EP1353069 A2 EP 1353069A2
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- EP
- European Patent Office
- Prior art keywords
- pump
- chambers
- chamber
- shut
- plates
- 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.)
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Classifications
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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
Definitions
- piston or diaphragm pumps are used for such tasks used.
- These types of pumps are oscillating positive displacement pumps.
- These pumps work on the displacement principle and are included
- Check valves equipped on the pump suction and pressure side A change in dosage is done by varying the piston or diaphragm stroke so that a changed dead space volume depending on the stroke set in the pump head.
- the check valves have a decisive influence on the pump function and the Dosing accuracy of the pumps.
- the well-known piston and diaphragm pumps are driven by a gear with cam or eccentric shaft driven.
- the direct coupling of these pumps with the Drive leads to large device dimensions, the design of which is miniaturized for many Test facilities is too large.
- the mechanical drives must be manufactured precisely and increase the investment costs.
- Pulsating displacement pumps are also equipped with magnetic drives. This makes the building dimensions of this Pump types slightly smaller and the pumps have a constant dead volume in the pump head.
- Microsystem pumps are known with which very small amounts of liquid can be used can be promoted.
- the micropumps are so-called precision pumps Function with the slightest contamination on the product side is no longer guaranteed.
- the flow channels and displacement spaces within the micropump heads have Dimensions of a few ⁇ meters. Contaminated products clog flow channels immediately, or block the dynamically moving pump parts so that a dosing process can be interrupted quickly. Leave small product channels Pumping and dosing of viscous substances does not lead to pressure loss is too big.
- micromembrane pumps which are based on piezoelectric or thermopneumatic drives very small structural dimensions and can dose small amounts of substance.
- DE 4402119 C2 describes a micro diaphragm pump that is also thermal is driven.
- These drive systems always work on the principle a thermally initiated volume expansion on a membrane side, so that the Delivery membrane of the pump generates a pumping effect by the deflection. With no greater differential pressures can be overcome in these drive systems at z.
- B a liquid substance in a container under higher pressure to dose.
- these pumps tend to become blocked, so that the operational Use in chemical laboratories is unsatisfactory and in preparative chemical laboratories such pumps are not used.
- Microsystem pumps so-called gerotor pumps, work at high speeds and create pressure in the annular gap. During the pressure build-up in the discharge In the area of the pump, there is a backflow into the suction area, in particular due to the mechanical tolerances of the rotor and stator of the pump, so the pump efficiency is greatly reduced. Because of the low The driving power of the microsystem pumps is the reproducible dosing of Low-viscosity substances against high pressure are generally not guaranteed.
- the invention has for its object to develop a pump that is strongly miniaturized, small volumes, e.g. from 5 ⁇ l to 1000 ⁇ l / stroke and per unit of time, promotes and has a high short-term dosing accuracy.
- the pump should have a good suction behavior and promote against pressure, so that even in pumping against pressure is possible when the pump head is not flooded.
- the dosing of substances with different densities is not intended to be essential Influence the delivery accuracy and the dosing behavior.
- the susceptibility to failure against constipation due to product contamination should be significantly reduced so that there is no need for additional fine filters on the suction side of the pump can be.
- required suction and pressure valves of the pump head should be independent of density, Open and close reproducibly, especially when closed Condition to be tight against gas pressure so that no back flow during pumping takes place, achieves a high degree of efficiency and therefore precise pumping against pressure is made possible.
- the dosing capacity of the volume flows to be conveyed must be easily adjustable or variable and should be 5 to 100,000 ⁇ l / stroke, preferably 10 to 10,000 ⁇ l / stroke and particularly preferably 10 to 1,000 ⁇ l / stroke be.
- the pump is designed in particular due to different corrosion requirements inexpensive in the chemical industry from various resistant materials be producible. Due to the occasional harsh operating conditions Repair and maintenance should be simple and inexpensive.
- the design of the control or drive technology should not have any influence on the pump head size and the possibility of integration in a miniaturized Take the test facility.
- the pump should be modular, so that through appropriate additions or replacement of module parts, the dosing pump can be easily modified.
- the change in dosing performance should take place without the displacement path of the membrane or piston in the pump head the dead volume increases so that the aspirated liquid volume increases is completely pushed out of the pump head at any time.
- a modular lamella-like structure pneumatically driven pump head that consists of at least three rigid Slats (plates) and in the area of the individual parting plane of the middle Plate and the adjacent adjacent plates at least one concave Well is present and each well is completely covered by an elastic membrane is covered and the membrane on one side part of the product space the pump and the other side is part of the control room.
- the wells one or on both sides of the membrane form the max. Way around the elastic membrane can be deflected.
- the invention relates to a diaphragm pump with a multi-part pump body, at least comprising three rigid plates and one between each of these plates arranged elastic membrane, the plates at least one pumping chamber and at least two shut-off chambers, in particular in a spatial form of a truncated spherical section of a spherical zone (spherical cap), cylinder or cone, with one inlet and one outlet opening for the material to be conveyed, and the Pump and shut-off chambers are connected to one another via connecting channels, and together with an inlet duct, the connecting ducts and an outlet duct form a passage channel, characterized in that the pump and Isolation chambers through the membranes into a product room and a control room are divided and the control rooms have control lines that are connected to a Control unit are connected.
- control room is opened in particular via a channel, which is passed through the respective outer plate, e.g. an electro-pneumatic Control unit, e.g. has a vacuum generator connected, to alternate pressurization or vacuum application to the control room enable.
- an electro-pneumatic Control unit e.g. has a vacuum generator connected
- a hydraulic fluid for pressure and To use train control.
- a tax program which has at least four successive control steps, each with an associated one Has time element, for example, the membranes in the pump and Shut-off chambers are deformed so that the control or product space alternates enlarged or reduced.
- the membrane opens or closes at the same time the inlet and outlet opening of the chambers in the membrane area, so that at least the supply channels in contact with the product are tightly closed during the closing process are and for a given control at least one in the direction of flow lying membranes produces a reproducible volume displacement.
- the control unit is particularly due to the degree of miniaturization required decentrally arranged and with pneumatic control e.g. with flexible Hoses connected to the pump head.
- a combination of electronic control and Understood actuators e.g. electro-pneumatic switching valves on a compressed air / vacuum distributor are mounted, which is located in a secondary line pneumatic vacuum generator.
- the electronic control and the Actuators can e.g. be assembled together in one housing.
- the electropneumatic Valves are operated by means of a control program to ensure an exact sequence of work steps for the pumping process.
- shut-off and pumping chambers are on the edge by the inserted and pressed membranes sealed.
- each shut-off and pumping chamber is an individual one has assigned membrane and the membranes are inserted between the plates.
- the membranes are clamped around in the Partition planes of the plates follow the pressurized control and product rooms tightly sealed on the outside.
- a preferred embodiment of the pump has at least in the product space Pump chamber has a groove that is the apex of the pump chamber with the outlet opening connects the pump chamber.
- the connecting groove from the apex to the pump chamber outlet increases the accuracy and reproducibility of the funding process by using a complete discharge of the dosing volume is guaranteed.
- the groove forms one dissipating collecting channel for the dosing material and compensates for deformation differences the elastic membrane. There must be one between the inlet of the chamber and the groove Surface to be in place so that the membrane is the inlet opening of the chamber to the groove can seal.
- the groove can be an elongated channel, the groove can also have a branched contour in the recess.
- control pressure is on the membrane in all control rooms can be set at least 0.1 bar higher than the prevailing pressure at the outlet channel, the control pressure is preferably at least around 0.5 bar higher and particularly preferably the control pressure is 1 bar higher than that Outlet port pressure.
- the higher differential pressure between the outlet duct and the control side pressure provides the tight sealing of the respective inlet openings in the chambers by the Membrane safe.
- the membranes preferably consist of an elastic material, in particular an elastomer, silicone, Viton, Teflon or an EPDM rubber.
- a preferred embodiment of the pump in which several Shut-off chambers have a common membrane.
- a preferred embodiment of the diaphragm pump is characterized in that the pump consists of at least three plates and the pumping and isolating chambers are formed by depressions in the plates.
- the pump consists of at least three Plates and the pumping and shut-off chambers are in one by depressions middle plate formed.
- diaphragm pump is characterized in that that the pump consists of at least three plates and the pump and Isolation chambers are formed by recesses in the outer plates.
- the membrane opposite Wall of the control room at least in the pumping chamber a compensation volume, in particular a flat recess, in which the membrane is under negative pressure nestles in the control room.
- this is Compensation volume at most 100% of the respective associated product space volume, the compensation volume is preferably at most 20%, and the compensation volume is particularly preferably at most 10% of the product space volume.
- the product spaces of the containment chambers are smaller than that Product chamber of the pump chamber executed.
- the center-to-center distance of the adjacent inlet and outlet of each Pump or shut-off chamber is two to ten times the largest hydraulic diameter of the respective inlet or outlet opening, preferred the center distance is twice to five times and particularly preferably that two to three times.
- the defined center distance is an important functional dimension of the chambers. He cares for tightly closing the supply and discharge channels or openings and increases the reproducible delivery of gaseous or liquid substances and influences the degree of miniaturization.
- the connecting channels between the pumping chamber and the isolation chambers are straight in a preferred embodiment and have a ratio of Channel length to the respective hydraulic diameter of the channels of at most 20, preferably at most 10, particularly preferably at most 5.
- the small dead space volume between the pump and shut-off chambers improves the Suction power of the pneumatic pump.
- the diaphragm pump plates are preferred for cleaning and repair purposes releasably connected.
- a decentralized electro-pneumatic control unit preferably also enables one synchronous control of several pump heads, so that several Pumping only one control unit is necessary.
- the control for the delivery with the diaphragm pump is preferably carried out in such a way that that a conveyor stroke consists of at least four individual consecutive ones Control steps exist and each individual control step with an intermediate constant or variable timing element for the subsequent control step is separated and the delivery or metering capacity of the pump by changing at least one timer can be changed.
- the timers interwoven between the control steps ensure that the Pneumatically triggered sub-steps of the pump stroke carried out precisely and completely and the individual steps are reproducible.
- the synchronous Changing all timers to regulate the delivery rate ensures an easy user-friendly handling of the pump.
- the timing elements belonging to the control range from T 0.1 seconds to 100 Seconds, preferably T 0.3 seconds to 30 seconds and particularly preferred the timer T is 0.5 seconds to 10 seconds.
- timers are synonymous with the presence of the control signal and ensure that the fast electronic control signals (signal runtime) not be stopped prematurely before the slower pneumatic Operations to deflect the membranes and the slower ones hydraulic displacement processes on the product-contacting side of the membrane Are completed. Especially when viscous substances are conveyed, the fluid dynamic processes take more time than the electronically triggered processes Control signals.
- the dosing cycle preferably consists of at least four control steps and has at least two different time elements, of which only one time element can be changed and used to regulate the pump cycle.
- the pneumatic opening and closing of the membranes in the shut-off chambers be provided with a non-adjustable smaller timer and a variable timer for opening / closing the middle larger pump chamber be used.
- Two different timing elements are particularly advantageous if the volume the isolation chamber is smaller than the volume of the pump chamber.
- each timing element is larger than the one required Switching time of the assigned electro-pneumatic multi-way valves.
- An electro-pneumatic control unit can run several diaphragm pumps in parallel control so that the pumps may have different sized pumping chambers synchronously different substances in different amounts at the same time can dose.
- 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 area of the apex the chamber (greatest extent over the membrane) is in particular larger than that 2 times the membrane thickness and less than 10 times the membrane thickness.
- the concave recesses in the plates can have different geometrical shapes Have shapes such as that of a cylinder, a spherical section or one Truncated cone.
- the diaphragm pump preferably has a shut-off chamber on the suction and pressure side smaller recesses than for the pump chamber, and all recesses are completely on the product side of the membrane side in the middle plates arranged.
- a variant of the diaphragm pump preferably consists of a pneumatically controlled one Pump chamber, combined with two solenoid-operated valves as shut-off chambers.
- the diaphragms used in the pump are preferably around in diameter designed at least 20% larger than the diameter of the chambers formed in the parting plane of the plates.
- metallic Membranes used as a pump membrane and inserted or insoluble with one of the Partial plates, in particular an outer plate connected by welding.
- a pulsation damper is in the flow direction behind the pressure-side shut-off chamber, especially in the area the outlet channel of the diaphragm pump.
- the diaphragm pump is equipped with a integrated spring-loaded overflow valve equipped to an internal product circuit to generate in the diaphragm pump. If the connected control pressure An integrated relaxation option is greater than the desired pump pressure created from the pump pressure side to the pump suction side.
- the three rigid plates at least two pump units, consisting of two pumping chambers with associated four shut-off chambers to form a double diaphragm pump head arranged.
- the invention also relates to a pump set consisting of two or more Diaphragm pumps, the diaphragm pumps according to the invention having a common one Have control unit.
- a pump set is preferred in which the diaphragm pumps pass through continuously Have plates.
- the diaphragm pump according to the invention with a controllable suction and pressure valve or suction-side and pressure-side shut-off chamber can, depending on the design size very small volume flows of ⁇ 5 ⁇ l / stroke up to the ml range per Minutes are reproducibly promoted.
- the separate structure is particularly advantageous between the actual pump unit or pump head and the decentralized electrical or electro-pneumatic control unit, this is the required Space requirement for a continuously operating conveyor in a highly miniaturized Pilot plant for screening work very small.
- This pump principle works without mechanical gear and the necessary components of the pump head have no dynamic function, except for the deflection of the membrane in the area the shut-off and pumping chamber, so that even for a miniaturized version the pump components do not require precision manufacturing. Mechanical interference influences are missing due to the lack of mechanical parts and the manufacturing costs are for this reproducible diaphragm pump head significantly minimized.
- the pump only needs a power supply and a compressed air supply to be able to work; these are available in every laboratory.
- the use of the diaphragm pump for dosing is particularly advantageous very small quantities of liquid substance, the volume of which per pump stroke is essential is below the specific drop size.
- the extremely small hold-up of the pump head and the small dead space volume ensures good suction behavior and fast, reproducible dosing, in particular for applications involving new pharmaceutical substances that are in the early Developmental stages are only available in small quantities.
- Setting small dosing flows is particularly easy because the setting the dosing quantity with constant displacer volume with an intermediate one Timing in the control takes place. This makes it very easy to do without cross-checking Volume flows can be changed.
- the lamellar structure of the diaphragm pump with integrated controllable valves which generates a pulsating metering flow due to the pumping principle it is possible to multiply the dosing flow by multiplying the displacement unit and the valves to be comparable, the structural dimensions of the pump in the The pilot plant is not significantly enlarged.
- Figure 1 is a diaphragm pump 200 in cross section with the associated control 100 and housing and pneumatic distributor 115 shown.
- the housing has a display 101, an on / off switch 102 and several function buttons 103 to 109, with which needed Parameters entered for the pumping process or for the pumping process, optical can be tracked and saved.
- the electronic controller 100 enables different operating variants, so that with the button 103 on continuous Operation and switched with button 104 to discontinuous operation of the pump can be.
- the discontinuous operation of the pump can be done by a Preselectable number of pump strokes set and with button 105 in the control get saved.
- button 106 you can reduce the set value Parameters, button 107 is for increasing the variable parameters provided, which is then also with the button 105 as a newly selected operating parameter the diaphragm pump can be saved in the control.
- the button 108 allows you to choose between internal and external control, from, for example, an external process control system.
- the pump 200 starts work when button 109 is pressed and when the button is pressed repeatedly 109 the operation is stopped again.
- the electronics with the programmable The control unit sends electrical connection cables at the start of dosing 110 digital signals to the electro-pneumatic multi-way valves 111, 112, 113, 114, which are then in their defined open or closed position (Table 1) switch.
- the electro-pneumatic multi-way valves 111 to 114 (Manufacturer, for example, SMC Penumatik GmbH, Düsseldorf), are on one pneumatic distributor block 115 mounted.
- the distribution block has two Supply channels 116, 117.
- the supply channel 116 is directly connected to the compressed air supply connected and the distribution channel 117 is connected to a vacuum line the vacuum supply connected.
- the vacuum is created by the bypass installed vacuum generator 118, an injector, generated by the valve 114 Switching on the electrical control is constantly supplied with compressed air.
- a compact construction is the distributor block 115 with the electro-pneumatic Multi-way valves and the vacuum generator 118 directly in the Housing of the controller 100, so that the compressed air supply to the supply channel 116 via a hose coupling 116 'and the pump head via the hose couplings 119 ', 120', 121 'can be connected.
- the freely programmable electronic Components, diodes for the optical function display, electrical power supply and an electrical circuit board is not shown in Figure 1.
- the freely programmable control of the pneumatically operated diaphragm pump 200 switches the electro-pneumatic multi-way valves 111 to 114 and directs the Pneumatic pressure present in distributor block 115 in channel 116 (pressure channel) or the vacuum in the distribution channel 117 (vacuum channel) through the control lines (Capillaries or tubing) 119, 120, 121 to the pneumatic control rooms (Pneumatic rooms) 220, 221, 222 in the pump 200.
- the valve 111 (V1) is through the control line 119 with the intake valve (lower Shut-off chamber 210) of the diaphragm pump 200 connected. According to the same scheme are the other valve 112 (V2) (upper shut-off chamber 212) and valve 113 (V3) connected to the pump chamber 211 of the pump 200.
- the valve 114 (V4) supplies the vacuum generator constantly with compressed air and is switched on as soon as the Electronics is supplied with electrical voltage.
- the diaphragm pump head 200 consists of the three sub-plates 201, 203, 205 and has inserted elastic membranes 202, 204 in the area of the pump chamber 211 and shut-off chambers 210, 212 are pneumatically deformable.
- the membranes 202, 204 have the same area as the panels 201, 203, 205 to provide a good seal to ensure the atmosphere.
- the Shut-off chambers 210, 212 are here, for example, in the plate 201 and the Pump chamber 211 is in the plate with a small volume equalization volume 205 and incorporated into the middle plate 203 with the larger volume fraction.
- shut-off chamber 210 e.g. the controllable suction valve of the pump head named.
- the pump chamber 211 accordingly represents the delivery chamber and the shut-off chamber 212 represents the controllable pressure valve of the pump head.
- the membranes 202, 204 divide the pump chamber 211 and shut-off chambers 210 and 212 in control rooms 220, 221, 222 and in product rooms 230, 231, 232.
- the pump chamber 211 and shut-off chambers 210 and 212 have the shape of truncated cones.
- the middle plate 203 has an intake duct 207 and an outlet duct 206. Both channels 206, 207 are each one welded capillary extended.
- the channels 209, 208 connect the Product spaces 230, 231, 232 of the chambers 210, 211, 212 with each other.
- the pump chamber 211 has a groove 213 as a connecting element from the deepest geometric point of the recess in the plate to the outlet opening or Connection channel 209. It is also clarified that between inlet channel 208 and Start of the outlet channel 209 with the connecting groove 213 is still sufficient there is a large gap to close the openings in the product space to enable the pumping chamber through the membrane 204.
- the diaphragm pump 200 is shown here in control step 4 (see Table 1).
- the area of the shut-off chamber 210 (controllable suction valve) is the membrane 202 the control chamber side 220 is pressurized so that the membrane 202 the Intake channel 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, see above that the membrane area stands out and the supply and discharge connection channel 208, 209 opens.
- the shut-off chamber 212 is also on the control side Vacuum applied so that the connecting channel 209 and the outlet channel 206 are opened in the following control step 5 (see table 1) the pump stroke volume to displace from the pumping chamber.
- control step 5 see table 1 the pump stroke volume to displace from the pumping chamber.
- Figure 1 are required Screws for pulling the panels together and pressing them together inserted membranes not shown.
- step V1 (111) suction valve V3 (113) displacer V2 (112) pressure valve V4 (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
- control sequence there is a changeable timer after each control step 1 - 5 programmed (not shown in Table 1), so that the individual one after the other The control steps taking place do not influence each other and are complete be carried out.
- the switching times of the electro-pneumatic valves are larger and therefore much slower than the time required to send the digital Signals.
- the pump function is activated by the intermediate timing elements reproducible and complete according to the control cycle 1-5 (see table 1) carried out.
- FIG. 2 shows a diaphragm pump similar to the pump described in FIG. 1, however, the chambers or the depressions 210 ', 211', 212 'are in the middle plate 203 '.
- the chambers 210 'to 212' here have the shape of a spherical section. It can be seen that the height at the apex of the depression Pump chamber is larger than the thickness of the membrane.
- the Center distance of the supply and discharge channels 207, 208 on the intake side of the Pump (chamber 210 ') larger than the center distance of the supply and discharge Channels 209, 206 of the pressure valve (chamber 212 ').
- the bigger one Center distance on the suction valve increases the tightness of the suction valve and one Backflow of the product prevented during the pumping process.
- FIG. 3 shows a variant of the pump 200 from FIG. 2 with three separately inserted ones Membranes 300, 301, 302.
- the membranes 300, 301, 302 are in operation via the control room side via a hole according to the control program pressurized with compressed air or vacuum to close the pump function guarantee.
- FIG. 4 shows, for example, the parallel operation of three diaphragm pumps 200a, 200b, 200c of the type shown in FIG. 3 again in the uncontrolled state. These are parallel to the lines of the pressure distributor 115, as in FIG. 1 connected.
- the pneumatic multi-way valves of the pressure distributor 115 are actuated and effect by means of the electrical control, not shown here via the control lines 119 to 121, which branches here to the three pump heads are connected, the actuation of the membranes.
- FIGS. 5 and 5a show an embodiment of the diaphragm pump 200d in which two Pump units or two pump heads have common sub-plates.
- the partial plates are clamped with the screws 500.
- the main contours like Pump chambers and connecting channels inside the pump head are shown in the figure 5 a shown with broken lines.
- the double pump head can be used with one Control unit operated so that with a control stroke (accordingly Step 1-5; Table1, Fig.1) double the delivery rate per stroke can be metered.
- Another use is when the size is the same or different Pump chambers are introduced into the partial plates, so that with a control unit two different substances can be pumped in sync, or they can be Pump head two control units for the generation of different material flows connected.
- FIG. 5a clearly shows that the outer contours (501, 502, 503) of the chambers in the different levels of the plates overlap one another low dead space volume and therefore good output behavior of the pump guarantee. Furthermore, a particularly compact pump head design possible.
- FIG. 6 shows in cross section two sections of the plates 203, 205 in the region of the Pump chamber 211 of a diaphragm pump similar to Figure 1.
- the volume of the pump chamber is distributed in the same proportion on both plates, so that the inserted Membrane 301 is clamped over a concentric sealing surface 214 and the Seals product space 231 and the control space 221 to the outside
- FIG. 7a shows the top view of the recess in a diaphragm pump in the form of a Spherical section geometry of the pump chamber 211.
- the intended one can be seen Groove 213, which runs from the apex of the pump chamber to the connecting channel 209 runs and as a collecting channel for a complete emptying of the product space serves.
- FIG. 7a shows a further special embodiment of a branched groove 213 ' or the collecting channel 213 shown.
- FIG. 8 shows the diaphragm pump head 200 according to the invention with a Pump chamber 211 "and two shut-off chambers 210", 212 “and the one between the Plates 201 “, 203", 205 “, inserted elastic membrane 202" and 204 ".
- the diaphragm pump has recesses in the outer Plates 201 “, 205" and the collecting channel 213 "are in plate 203".
- Figure 9 shows a combined arrangement of the connecting channels of the pump head.
- the middle plate is shown in a sectional view and the outer Plates 201 ', 205' can be reduced in size due to the arrangement of the passage channel become.
- the inlet channel 207 'and connecting channel 208' between the pump chamber and the shut-off chamber on the suction side are at right angles to the outer plate contour introduced so that the connecting channel 208 'is straight and short.
- the dead space volume of the connecting channel 208 ' is thereby minimized.
- the connecting channel to the pressure side shut-off chamber has a greater length and a larger Dead space. This design requires a third reduced plate 205 'for the structure of the pump.
- FIG. 9a shows an optimized pump with a small dead space volume. wherein the central plate 203 'is shown in a sectional view.
- the geometric areas of the recesses of the shut-off chambers are partially or completely in the shadow of the geometrical surface of the pump chamber recess, see above that the connection channels from the pump chamber to the shut-off chambers are extremely short are and an optimized suction behavior of the pump is made possible.
- the shut-off chamber 212 'from the pump chamber 211' to the pressure side is the Connection channel 209 'positioned at the apex of the pump chamber recess, see above that the collecting channel (see FIG. 7) is omitted.
- the dead space volume of the pump forms from the volume of the two connecting channels 208 ', 209'.
- the channel length ratio 208 'to diameter is 3.5.
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Abstract
Description
- Figur 1
- zeigt den schematischen Aufbau einer lamellenartig aufgebauten pneumatischen Membranpumpe mit zugehörender elektro-pneumatischer Steuereinheit und programmierbarer elektronischer Steuerung sowie den Verbindungsleitungen.
- Figur 2
- zeigt beispielhaft eine Membranpumpe bei der Vertiefungen in der mittleren Platte eingearbeitet sind und die Pump- und Absperrkammern bilden.
- Figur 3
- zeigt einen Pumpenkopf mit separat eingelegten elastischen Membranen für jede Kammer.
- Figur 4
- zeigt eine Anwendung bei der mehrere Pumpen mit einer Steuereinheit verschaltet sind.
- Figuren 5, 5a
- zeigen eine Doppel-Membranpumpe mit gemeinsamen Platten.
- Figur 6
- zeigt ausschnittsweise eine Pumpkammer mit Ausgleichsvolumen in der Steuerkammer.
- Figuren 7, 7a
- zeigen die Anordnung und Ausgestaltung der Nut bzw. des Sammelkanals in z. B. einer Pumpkammer.
- Figur 8
- zeigt eine Pumpe mit Kammern in den äußeren Platten.
- Figuren 9, 9a
- zeigen Ausführungen der Membranpumpe mit Kammern in der inneren Platte.
Schritt | V1 (111) Saugventil | V3 (113) Verdränger | V2 (112) Druckventil | V4 (114) Vakuum |
Grundstellung | 1 | 1 | 1 | 1 |
1. Schritt | 0 | 1 | 1 | 1 |
2. Schritt | 0 | 0 | 1 | 1 |
3. Schritt | 1 | 0 | 1 | 1 |
4. Schritt | 1 | 0 | 0 | 1 |
5. Schritt | 1 | 1 | 0 | 1 |
Zurück nach Schritt 1 |
Claims (18)
- Membranpumpe mit einem mehrteiligen Pumpenkörper, wenigstens umfassend drei starre Platten (201, 203, 205) und mindestens zwei zwischen diesen Platten (201, 203, 205) angeordnete elastische Membranen (204, 202), wobei die Platten (201, 203, 205), mindestens eine Pumpkammer (211) und mindestens zwei Absperrkammern (210, 212), insbesondere in der Geometrie eines Kugelabschnitts, einer Kugelzone, eines Zylinders oder abgestumpften Kegels, mit je einer Einlass- (240) und einer Auslassöffnung (241) für das Fördergut bilden, und die Pumpkammer (211) und Absperrkammern (210, 212) zusammen mit einem Einlasskanal (207) den Verbindungskanälen (208) und (209) sowie einem Auslasskanal (206) einen Durchlasskanal bilden, dadurch gekennzeichnet, dass die Pumpkammer (211) und die Absperrkammern (210, 212) durch die Membranen (204, 202) in je einen Produktraum (230, 231, 232) und einen Steuerraum (220, 221, 222) getrennt sind und die Steuerräume (220, 221, 222) Steuerleitungen (119, 120, 121) aufweisen, die mit einer Steuereinheit (100, 115) verbunden sind.
- Membranpumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Pumpe im Produktraum (231) eine Nut (213) aufweist, die vom Scheitelpunkt des Produktraumes zur Auslassöffnung verläuft.
- Membranpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Pumpkammer (211) und die Absperrkammern (210, 212) randseitig durch die Membranen (204, 202) abgedichtet sind.
- Membranpumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Membranen (204, 202) aus einem elastischen Material, insbesondere einem Elastomer, Silikon, Viton, Teflon oder einem EPDM-Kautschuk bestehen.
- Membranpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Absperrkammern (210, 212) eine gemeinsame Membran (202) aufweisen.
- Membranpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Pumpe aus mindestens drei Platten (201, 203, 205) besteht und die Pumpkammer (211) und die Absperrkammern (210, 212) durch Vertiefungen (210', 211', 212') in den Platten (201, 203, 205) gebildet sind.
- Membranpumpe nach Anspruch 6, dadurch gekennzeichnet, dass die Pumpe aus mindestens drei Platten (201, 203, 205) besteht und die Pumpkammer (211) und die Absperrkammern (210, 212) durch Vertiefungen (210', 211', 212') in einer mittleren Platte (203') gebildet sind.
- Membranpumpe nach Anspruch 6, dadurch gekennzeichnet, dass die Pumpe aus drei Platten (201, 203, 205) besteht und die Pumpkammer (211) und die Absperrkammern (210, 212) durch Vertiefungen (210", 211", 212") in den äußeren Platten (201", 205") gebildet sind.
- Membranpumpe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Mittenabstand des jeweils benachbarten Einlasses (240) und des Auslasses (241) der Pumpkammer (211) oder der Absperrkammern (210, 212) mindestens das zweifache bis zehnfache des größten hydraulischen Durchmessers der jeweiligen Einlassöffnung (240) oder Auslassöffnung (241) beträgt.
- Membranpumpe nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Steuerräume mit Luft oder Hydraulikflüssigkeit betreibbar sind.
- Membranpumpe nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass der Einlasskanal (207) und der Auslasskanal (206) untereinander über eine Nebenleitung mit einem Überströmventil verbunden sind.
- Membranpumpe nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die Platten (201, 203, 205) lösbar miteinander verbunden sind.
- Membranpumpe nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die der Membrane (204) gegenüberliegende Wand des Steuerraums (221) mindestens in der Pumpkammer (211) ein Ausgleichsvolumen insbesondere eine flächige Vertiefung aufweist.
- Membranpumpe nach Anspruch 13, dadurch gekennzeichnet, dass das Ausgleichsvolumen höchstens 100 %, bevorzugt höchstens 20 % und besonders bevorzugt höchstens 10 % des zugehörenden Volumens des Produktraums (231) beträgt.
- Membranpumpe nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass die äußeren Konturen der Pump- und Absperrkammern in verschiedenen Ebenen überlagert angeordnet sind.
- Membranpumpe nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass die Verbindungskanäle zwischen der Pumpkammer (211') und den Absperrkammern (210', 212') ein Verhältnis von Kanallänge zu hydraulischem Durchmesser von höchstens 20 bzw. höchstens 10, besonders bevorzugt von höchstens 5 aufweisen.
- Pumpensatz bestehend aus zwei oder mehr Membranpumpen gemäß einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass die Membranpumpen eine gemeinsame Steuereinheit (100, 115) aufweisen.
- Pumpensatz nach Anspruch 17, dadurch gekennzeichnet, dass mindestens zwei Membranpumpen gemeinsame durchgehende Platten (201, 203, 205) aufweisen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10216146A DE10216146A1 (de) | 2002-04-12 | 2002-04-12 | Membranpumpe |
DE10216146 | 2002-04-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1353069A2 true EP1353069A2 (de) | 2003-10-15 |
EP1353069A3 EP1353069A3 (de) | 2004-08-25 |
Family
ID=28051271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03006884A Withdrawn EP1353069A3 (de) | 2002-04-12 | 2003-03-31 | Membranpumpe |
Country Status (5)
Country | Link |
---|---|
US (1) | US20030194332A1 (de) |
EP (1) | EP1353069A3 (de) |
JP (1) | JP2003307178A (de) |
CA (1) | CA2424872A1 (de) |
DE (1) | DE10216146A1 (de) |
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WO2018114862A1 (de) * | 2016-12-21 | 2018-06-28 | 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 |
CN110088474A (zh) * | 2016-12-21 | 2019-08-02 | 费森尤斯医疗护理德国有限责任公司 | 操作装置和用于运行操作装置的方法以及具有操作装置和隔膜泵装置的隔膜泵和具有隔膜泵的血液处理设备 |
US11441554B2 (en) | 2016-12-21 | 2022-09-13 | Fresenius Medical Care Deutschland Gmbh | Operating device, method for operating an operating device, diaphragm pump having an operating device and a diaphragm pump device, and a blood treatment apparatus having a diaphragm pump |
Also Published As
Publication number | Publication date |
---|---|
JP2003307178A (ja) | 2003-10-31 |
DE10216146A1 (de) | 2003-10-30 |
EP1353069A3 (de) | 2004-08-25 |
US20030194332A1 (en) | 2003-10-16 |
CA2424872A1 (en) | 2003-10-12 |
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