EP1088166B1 - Membranpumpe und verfahren zur steuerung derselben - Google Patents
Membranpumpe und verfahren zur steuerung derselben Download PDFInfo
- Publication number
- EP1088166B1 EP1088166B1 EP99926372A EP99926372A EP1088166B1 EP 1088166 B1 EP1088166 B1 EP 1088166B1 EP 99926372 A EP99926372 A EP 99926372A EP 99926372 A EP99926372 A EP 99926372A EP 1088166 B1 EP1088166 B1 EP 1088166B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- displacer
- membrane
- space
- evaluation unit
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
-
- 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
- F04B2203/00—Motor parameters
- F04B2203/09—Motor parameters of linear hydraulic motors
- F04B2203/0903—Position of the driving piston
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/03—Pressure in the compression chamber
Definitions
- the invention relates to a diaphragm pump with a Device for controlling the position of a conveyor and a displacement space separating membrane and with a reservoir for the hydraulic medium that over a refill unit, which can be actuated by an evaluation unit, with the displacement space in Connection is established.
- the invention also relates to a method for Control of the position of a membrane, the conveying and separates the displacement space of a diaphragm pump and from an oscillating displacer via a hydraulic medium is driven, the displacement space via a Line is topped up with hydraulic medium if necessary.
- Such pumps are, for example, as Piston diaphragm pump known from EP A1 0 085 725.
- the Piston diaphragm pump has a displacement piston, the oscillating in a completely with hydraulic medium filled displacement room is moved back and forth. The between the pumping chamber and the displacement chamber arranged membrane thereby leads to the Piston stroke volume corresponding membrane stroke.
- the inevitable occurring losses of hydraulic medium cause that the diaphragm position at the end of the suction stroke slowly moving towards the displacement space, reaches the Membrane the support plate or the membrane system scanning plunger.
- the support plate or ram will from the diaphragm against the pressure of springs towards moved to the displacement workspace.
- the pestle either directly the membrane system or the support plate scans, mechanically releases a refill valve, that is the result of the in the displacement workroom prevailing negative pressure opens and out of one Hydraulic fluid reservoir in the Can flow in displacement workspace. Move through it the membrane and the support plate under pressure Springs back towards the delivery chamber. While this movement sequence also slips the guard locking of the Refill valve back towards the delivery chamber and closes the refill valve.
- vent valve is for example from the Company print "AREX" known to the applicant.
- DE 43 09 380 A1 describes a method for Monitoring a pump system is known, in which the by amount pumped in relation to the Pump actuation path set and when exceeded a limit alarm is triggered.
- the funded Quantity is determined indirectly via a kind of pressure sensor. There is no provision for regulating the position of the membrane.
- DE A1 43 36 823 is a device for electronic membrane system control in Membrane process pumps are known, in which by means of a electromechanical or electronic encoder and Receiver position of the membrane is determined.
- An electronic evaluation unit is used to exact regulation, by the break or premature Wear is prevented by overload, a signal generated that the inlet of the hydraulic medium in the Displacer controlled.
- To detect the Membrane system is an electromechanical transducer proposed the via a spring-loaded plunger The position of the membrane is recorded directly. In this case too the diaphragm is additionally affected by the force of the plunger encumbered, which basically leads to a decreased Life expectancy of the membrane leads.
- the object of the invention is to provide a diaphragm pump create the volume of the displacement space can be checked as easily as possible so that the Membrane is protected and the operational safety of the. Pump is increased overall.
- This task is in the generic diaphragm pump solved in that a pressure sensor in the displacement space is arranged, which is connected to the evaluation unit which is used to generate a refill signal Decrease in the pressure measured by the pressure sensor or a derived value below one predetermined limit value is formed, which means an active connection actuating a refill unit on.
- the pressure sensor located in the displacement chamber reports this Negative pressure occurs during the intake stroke the evaluation unit. There is this signal with a predetermined limit value compared. Once the falls below the specified limit value, generates the Evaluation unit a signal that the refill of the Displacement chamber with hydraulic fluid. On this will overload the membrane with Avoided security.
- the limit can easily match the can be adapted to different operating conditions.
- There the pressure sensor has no moving parts operational reliability compared to mechanical systems advantageously increased.
- the membrane is covered by the Pressure sensor is not additionally loaded because it is not is in direct contact with the membrane, but only comes into contact with the hydraulic medium.
- the invention is therefore based on the electronic Evaluation of the temporal pressure curve in the Displacement chamber of a hydraulically articulated Diaphragm pump.
- the correct filling of the displacement space is ensured by an algorithm running on a computer unit and operated by an active connection Refill unit ensured. Leakages occurring or a lack of hydraulic medium in the displacement space are recognized and supplemented again.
- Refilling can be particularly advantageous realize if the refill unit as a valve is formed, preferably as an electrically operated Valve located in the refill line Connection between the displacement space and the Can produce reservoir for the hydraulic medium. It is also advantageous to use those in operation Simply retrofit diaphragm pumps so that the advantages the electronic control of the refill valve too are to be used with older pumps.
- the fact that the evaluation unit has a ventilation signal is designed to generate a ventilation unit can be actuated at a time during a working cycle of the displacer in which the Pressure in the displacement space is greater than that Ambient pressure in the reservoir for the Hydraulic fluid, if necessary also released, Air originally dissolved in the hydraulic medium from the Displacement room are carried out.
- Both Functions can be performed by the same valve, if the vent valve and the refill valve as Unit are formed.
- the originally released in the hydraulic medium Air both through the refill valve itself as well by another, for example electromagnetic Controlled identical vent valve from the Displacement room are carried out.
- the refill and that Vent valve can be constructed identically. The venting and the refilling process take place each as needed and not necessarily for everyone Duty cycle.
- Position sensor Another way without using a Position sensor consists in the arrangement of a pressure sensor in the delivery chamber of the diaphragm pump with a Signal connection to the evaluation unit in addition to the Pressure sensor in the displacement space.
- the evaluation unit can link the two sensor signals for example via a difference and the refill or vent signals are generated. This is also a safe peeling of the Refill and vent valve also among all Operating conditions guaranteed.
- the pressure sensors can alternatively be used as sensors for Detection of the expansion of the housing components of the Conveying space and the displacement space to be executed. These deliver signals that match the pressure signals are proportional. With appropriate signal connections the evaluation can be used to generate the evaluation unit the refill or bleed signals occur.
- the one with the Hydraulic medium flowable support plate for the Displacement chamber equipped with a membrane Refill unit in connection with the displacement room sees the solution of the task before that the pressure signal in the displacement space of one Sensor is detected and sent to an evaluation unit, those when the pressure measured by the pressure sensor drops or a value derived from it below one predetermined limit value, if necessary, refilling the Displacement chamber with hydraulic medium and if necessary Vent the displacer space from released originally dissolved in the hydraulic medium, Causes gas fractions.
- measured actual pressure signal instead of measured actual pressure signal also a derivative after the Time or after the route can be processed as a signal.
- the pressure in the displacement space is also advantageous detected by a sensor and an evaluation unit forwarded from it according to a certain algorithm venting the displacement space.
- the reliability of the process is further enhanced by the Measure lifted that detects the position of the displacer for example by an angle encoder on the Drive shaft, and the evaluation unit is fed and the signal with the pressure in the displacement space from the Evaluation unit is linked.
- FIG. 1 the structure of a hydraulically articulated Diaphragm pump head with an inventive represented electronic regulation.
- this diaphragm pump head 12 occurs depending on the time typically a pressure curve according to FIG. 2 on.
- the oscillating movement of the displacer 3 is here by the contained in the displacement room 2, under Alternating hydraulic fluid on the membrane 4 transfer. Occurs intentionally or unforeseen Leakage in displacement space 2 occurs there Lack of hydraulic fluid. Achieved as a result the membrane 4 at the end of the suction stroke Displacer arranged flowable, preferably Your displacer trained as a perforated plate 5 rear system before the displacer 3 its rear dead center. The movement of the membrane 4 and the displacer 3 thereby decouple.
- the refill process can now be carried out through the refill valve 9 take place because of a pressure drop from the below Hydraulic fluid in the ambient air pressure Storage container 11 to the displacement space 2 exists.
- the Detection of the pressure drop in the hydraulic room 2 to the end of the suction stroke takes place via the evaluation of the signal of the Pressure sensor 6 and if necessary additionally Link with the signal of the position sensor 7 in the Evaluation unit 8.
- the evaluation unit is free programmable computer unit is formed.
- the Position sensor 7 indicates the current position of the Displacer 3. Linking the signals from Position sensor 7 and pressure sensor 6 prevents for example, annoying pressure drops in the Displacement chamber 2 due to liquid vibrations or throttling due to narrowing of the cross section in the Lead the suction line to effect the refilling process.
- the algorithm running on the evaluation unit 8 therefore makes a sensible decision about blocking and release the refilling process through the refill valve 9.
- the algorithm on the computer unit 8 the vent valve 10 at a time other than release the refill valve 9 as soon as a pressure drop from displacement chamber 2 to the reservoir 11.
- excess can Hydraulic medium for example as a result of one Stroke change on the pump engine and / or free which were originally dissolved in the hydraulic medium Gases are expelled from the displacement space 2.
- the piston is in its membrane-side end position.
- the pressure valve 16 closes.
- the piston relaxes the delivery medium enclosed between the closed pressure valve 16 and the suction valve 15, including the hydraulic medium contained in the displacement chamber, until the media reach the mean pressure in the suction line p sm at time t1 and the suction valve 15 opens ,
- the piston continues to move and now sucks in the medium from the delivery line until the time t 2, the membrane 4 abuts the perforated plate 5 and the pressure in the displacement chamber 2 drops below the average pressure of the suction line p sm .
- the refill valve 9 opens briefly.
- the piston thus exceeds its reversing position and allows the suction valve 15 to close at time t 4 .
- the medium enclosed in the delivery chamber is then compressed down to the mean pressure and the pressure line p dm .
- the pressure valve opens at time t 5 .
- the delivery volume is expelled from the delivery chamber 1 through the pressure valve 16 until the piston reaches its other reverse position and the pressure valve is closed at time t 6 .
- a new work cycle begins.
- the diagram is an idealized representation. Deviations are common in practice. For example, the diagram may change due to impacts in the suction and pressure lines as well as ventilation processes.
- the Effecting the refill logs and the Frequency can also determine the functions of the Seals are checked. Depending on the leakage behavior maintenance can be carried out if necessary. Eventually the assembly of the pump is also more convenient because it can be adjusted the mechanical refill device is omitted. The necessary adjustments can be made directly on the Evaluation unit made during operation become.
- the evaluation device therefore advantageously has one non-volatile data storage that the corresponding data for a number of strokes in the case of a Interruption of operation for later diagnosis saves and then makes it readable.
- evaluation unit 8 additionally with a Interface to a communication network equipped is, it is possible to operate the pump from the To check remotely and, if necessary, to identify errors.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Description
- Figur 1:
- Skizze eines hydraulisch angelenkten Membranpumpenkopfes mit elektronischer Regelung der Befüllung des Verdrängerraums,
- Figur 2:
- Diagramm des Druckverlaufes im Förderraum einer hydraulisch angelenkten Membranpumpe ohne Nachfüllvorgang, und
- Figur 3:
- Diagramm des Druckverlaufes im Verdrängerraum einer hydraulisch angelenkten Membranpumpe
- 1
- Förderraum
- 2
- Verdrängerraum
- 3
- Kolben (Verdränger)
- 4
- Membran
- 5
- Lochplatte (Stützplatte)
- 6
- Drucksensor
- 7
- Positionssensor
- 8
- Auswerteeinheit
- 9
- Nachfüllventil
- 10
- Entlüftungsventil
- 11
- Vorratsbehälter für Hydraulikflüssigkeit
- 12
- Membranpumpenkopf
- 13
- Saugleitung
- 14
- Druckleitung
- 15
- Ansaugventil
- 16
- Druckventil
- 17
- Steuerleitung
- 18
- Signalleitung
- 19
- Drucksensor
Claims (12)
- Membranpumpe mit einer Vorrichtung zur Steuerung der Lage einer einen Förder- (1) und einen Verdrängerraum (2) trennenden Membran (4) und mit einem Vorratsbehälter (11) für das Hydraulikmedium, der über eine durch eine Auswerteeinheit betätigbare Nachfülleinheit mit dem Verdrängerraum (2) in Verbindung steht, dadurch gekennzeichnet, daß im Verdrängerraum (2) ein Drucksensor (6) angeordnet ist, der mit der Auswerteeinheit (8) verbunden ist, die zur Erzeugung eines Nachfüllsignals bei Absinken des vom Drucksensor (6) gemessenen Drucks oder eines daraus abgeleiteten Wertes unter einen vorgegebenen Grenzwert ausgebildet ist, das mittels einer Wirkverbindung (17) die Nachfülleinheit betätigend schaltet.
- Membranpumpe nach Anspruch 1, dadurch gekennzeichnet, daß im Verdrängerraum (2) eine Stützplatte (5) für die Membran (4) angeordnet ist.
- Membranpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Nachfülleinheit als Ventil (9) ausgebildet ist, vorzugsweise als elektrisch betätigtes Ventil, das in der Nachfüllleitung angeordnet ist.
- Membranpumpe nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Auswerteeinheit (8) ein Entlüftungssignal erzeugend ausgebildet ist, das ein Entlüftungsventil (10) betätigend geschaltet ist.
- Membranpumpe nach Anspruch 1, 2, 3 oder 4, dadurch gekennzeichnet, daß das Entlüftungsventil (10) und das Nachfüllventil (9) als Baueinheit ausgebildet sind.
- Membranpumpe nach einem oder mehreren der vorherigen Ansprüche, dadurch gekennzeichnet, daß ein zweiter Drucksensor (19) im Förderraum (1) angeordnet ist, der eine Signalverbindung (18) zur Auswerteeinheit (8) aufweist.
- Membranpumpe nach einem oder mehreren der vorherigen Ansprüche, dadurch gekennzeichnet, daß der Drucksensor (6, 19) als Dehnungssensor ausgebildet ist, der die Dehnung des Gehäuses erfaßt.
- Membranpumpe nach einem oder mehreren der vorherigen Ansprüche, dadurch gekennzeichnet, daß ein Positionssensor (7) zur Signalisierung der Verdrängerlage (3) vorgesehen ist und eine Signalverbindung (18) vom Positionssensor (7) zur Auswerteeinheit (8) vorgesehen ist.
- Verfahren zur Steuerung der Lage einer Membran (4), die den Förder- (1) und den Verdrängerraum (2) einer Membranpumpe trennt und von einem oszillierenden Verdränger (3) über ein Hydraulikmedium angetrieben ist, wobei der Verdrängerraum (2) über eine Leitung mit Hydraulikmedium bei Bedarf nachgefüllt wird, dadurch gekennzeichnet, daß der Druck im Verdrängerraum (2) von einem Sensor (6) erfaßt und einer Auswerteeinheit (8) zugeleitet wird, die bei Absinken des vom Drucksensor (6) gemessenen Druckes oder eines daraus abgeleiteten Wertes unter einen vorgegebenen Grenzwert das Nachfüllen des Verdrängerraumes (2) mit Hydraulikmedium bewirkt.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß der Druck im Verdrängerraum (2) von einem Sensor (6) erfaßt und einer Auswerteeinheit (8) zugeleitet wird, die daraus nach einem bestimmten Algorithmus das Entlüften des Verdrängerraumes (2) bewirkt.
- Verfahren nach Anspruch 9 oder 10 dadurch gekennzeichnet, daß zur Bewirkung des Nachfüllens und/oder Entlüftens des Verdrängerraumes (2) die Lage des Verdrängers (3) erfaßt und der Auswerteeinheit (8) zugeleitet wird und mit dem Druck im Verdrängerraum (2) von der Auswerteeinheit (8) verknüpft wird.
- Verfahren nach Anspruch 9, 10 oder 11, dadurch gekennzeichnet, daß zur Bewirkung des Nachfüllens und/oder Entlüftens des Verdrängerraumes (2) der Druck im Förderraum (1) erfaßt und der Auswerteeinheit (8) zugeleitet wird und mit dem Druck im Verdrängerraum (2) von der Auswerteeinheit (8) verknüpft wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19826610A DE19826610A1 (de) | 1998-06-16 | 1998-06-16 | Membranpumpe und Vorrichtung zur Steuerung derselben |
DE19826610 | 1998-06-16 | ||
PCT/EP1999/003541 WO1999066204A1 (de) | 1998-06-16 | 1999-05-22 | Membranpumpe und vorrichtung zur steuerung derselben |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1088166A1 EP1088166A1 (de) | 2001-04-04 |
EP1088166B1 true EP1088166B1 (de) | 2002-07-31 |
Family
ID=7870931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99926372A Expired - Lifetime EP1088166B1 (de) | 1998-06-16 | 1999-05-22 | Membranpumpe und verfahren zur steuerung derselben |
Country Status (7)
Country | Link |
---|---|
US (1) | US6554578B1 (de) |
EP (1) | EP1088166B1 (de) |
JP (1) | JP4153166B2 (de) |
AT (1) | ATE221620T1 (de) |
DE (2) | DE19826610A1 (de) |
ES (1) | ES2183566T3 (de) |
WO (1) | WO1999066204A1 (de) |
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US5056036A (en) | 1989-10-20 | 1991-10-08 | Pulsafeeder, Inc. | Computer controlled metering pump |
NL9101556A (nl) * | 1991-09-16 | 1993-04-16 | Holthuis Bv | Besturingssysteem voor zuigermembraanpomp. |
US5249932A (en) * | 1991-10-07 | 1993-10-05 | Erik Van Bork | Apparatus for controlling diaphragm extension in a diaphragm metering pump |
DE4309380C2 (de) | 1993-03-23 | 2000-01-05 | Infors Ag Bottmingen | Verfahren zur Überwachung eines Systems |
DE4420863C2 (de) * | 1994-06-15 | 1998-05-14 | Ott Kg Lewa | Gesteuerte Schnüffelbehinderung für Hochdruck-Membranpumpen |
-
1998
- 1998-06-16 DE DE19826610A patent/DE19826610A1/de not_active Withdrawn
-
1999
- 1999-05-22 WO PCT/EP1999/003541 patent/WO1999066204A1/de active IP Right Grant
- 1999-05-22 DE DE59902205T patent/DE59902205D1/de not_active Expired - Lifetime
- 1999-05-22 EP EP99926372A patent/EP1088166B1/de not_active Expired - Lifetime
- 1999-05-22 US US09/719,650 patent/US6554578B1/en not_active Expired - Lifetime
- 1999-05-22 JP JP2000554993A patent/JP4153166B2/ja not_active Expired - Fee Related
- 1999-05-22 ES ES99926372T patent/ES2183566T3/es not_active Expired - Lifetime
- 1999-05-22 AT AT99926372T patent/ATE221620T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US6554578B1 (en) | 2003-04-29 |
DE59902205D1 (de) | 2002-09-05 |
JP2002518635A (ja) | 2002-06-25 |
WO1999066204A1 (de) | 1999-12-23 |
JP4153166B2 (ja) | 2008-09-17 |
ES2183566T3 (es) | 2003-03-16 |
EP1088166A1 (de) | 2001-04-04 |
DE19826610A1 (de) | 1999-12-23 |
ATE221620T1 (de) | 2002-08-15 |
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