EP0781922A1 - Doppelmembranpumpe - Google Patents
Doppelmembranpumpe Download PDFInfo
- Publication number
- EP0781922A1 EP0781922A1 EP95203667A EP95203667A EP0781922A1 EP 0781922 A1 EP0781922 A1 EP 0781922A1 EP 95203667 A EP95203667 A EP 95203667A EP 95203667 A EP95203667 A EP 95203667A EP 0781922 A1 EP0781922 A1 EP 0781922A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- pump
- valve
- control
- double
- 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.)
- Granted
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
- F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
- F04B43/0736—Pumps having fluid drive the actuating fluid being controlled by at least one valve with two or more pumping chambers in parallel
Definitions
- the present invention relates to a double-acting membrane pump comprising a first pump chamber in which a first membrane is arranged a second pump chamber in which a second membrane, coupled to the first membrane, is arranged, each pump chamber being provided with a connection for working fluid and a control device being coupled to each of said connections, for the metered supply of working fluid, which control device comprises at least an electrically controlled pulsing control valve for applying or relieving the pressure on one of the connections to the relevant pump chamber.
- a double-acting membrane pump of this type is disclosed in both European Application 0 386 610 and US Patent 4 818 191.
- Pumps of this type are used, inter alia, for filling packs and other containers of all manner of types.
- One application is the filling of paint cans.
- the pump disclosed in the general prior art is provided with a control device which, like the pump, operates pneumatically.
- This control device comprises a pneumatic reciprocating piston which alternately brings the plenum chamber behind the first membrane and the plenum chamber behind the second membrane under pressure. Change-over from the one position to the other position of the control piston is determined by the relevant membranes coupled to one another reaching the extreme position.
- the reciprocating piston of the device moves to and fro with a specific frequency, which is dependent on the medium pumped and, to a lesser extent, on the pressure of the compressed air.
- This frequency cannot be influenced during the filling cycle.
- changing the air pressure supplied gives rise to the risk that the pump comes to a standstill.
- This too is a disadvantage because, when filling containers to a specific fill weight or volume, in the first instance material can be supplied at high speed whereas at a later stage it is necessary to work at a lower speed. This can be avoided by incorporating an air speed control upstream. With this arrangement the pump still has to execute complete strokes, which leads to the said poor meterability.
- a solution to this problem has been found by the provision of a valve or shut-off device which has various passages. That is to say, a pre-setting of the valve is achieved, by which means the metering accuracy can be set.
- the aim of the present invention is to provide a metering system with which it is possible to meter highly fluctuating amounts of fluid without this resulting in an excessive rise in the cost price of the double-acting membrane pump and the control thereof.
- control valve is constructed such that said valve has a position in which the pressure on both connections to the pump chambers is relieved at the same time in a manner controllable as a function of time.
- the insight on which the invention is based is not to allow the one stroke of the one membrane to follow directly on the preceding stroke of the other membrane.
- a controllable pause can be inserted using the valve according to the invention. As a result, it is also possible to allow only one membrane to carry out work.
- a control of this type can be achieved relatively simply using the microprocessors currently available.
- a three-position valve which can be set to a fixed position in each of the three positions.
- the first position is then, for example, the control for the one membrane, the second position the control for the second membrane and the third position a position in which the pressure on both membranes is relieved.
- the "flow" can be controlled by varying the frequency.
- the membrane pump according to the invention is, moreover, of double-acting construction, a continuous, non-pulsating, output flow of fluid can be obtained, the volume of which can be accurately controlled.
- a container can, for example, be filled accurately on the basis of weight or fill height.
- This control valves preferably have a throttle function.
- the control valves can be of rapidly pulsing design. By, for example, actuating a membrane for a specific time, such a membrane executes a stroke to one side. If the relevant air pulse is sufficiently large, the membrane will execute the complete stroke. In the case of a smaller air pulse, the membrane will execute a short stroke It is possible to reverse the direction of movement without the end position having to be reached.
- the delivery of the pump can be controlled by controlling the duration of the air pulses and the time at which these are applied. With short air pulses, the membranes of the pump will execute only short strokes, as a result of which a low flow can be realised. As a result of the double character of the pump, a pulsing action of this type is not reflected in the metered amount of fluid.
- the pump shown in the single figure is indicated in its entirety by 1. This pump is controlled by a controller indicated in its entirety by 2.
- Pump 1 consists of a first pump chamber 3 and a second pump chamber 4. These chambers are separated by, respectively, a first membrane 5 and a second membrane 6 from a first plenum chamber 11 and a second plenum chamber 12. The membranes are connected to one another via a coupling rod 13. Plenum chambers 11 and 12 are provided with openings 7. In this way plenum chamber 11 is connected to line 14 and plenum chamber 12 to line 15. Line 14 is connected to the first control valve 8, whilst line 15 is connected to second control valve 9. These lines are supplied with air via a line 16. Valves 8 and 9 are controlled by a microprocessor 17. The latter is provided with an input 18 which can be connected to a further microprocessor, which, for example, can be controlled by a weighing unit.
- the common inlet of the membrane pump is indicated by 19 and the common outlet by 20. Ball valves 21 are present.
- a membrane pump of this type is generally known in the prior art.
- the pumps are marketed by Wilden, model M.025 and model M1.
- the apparatus described above functions as follows.
- microprocessor 17 controls control valves 8 and 9 in a pulsing manner with a specific frequency.
- a long pulse is emitted so that the membrane will travel over a relatively long path before the function of the valves 8 and 9 is reversed so that the working direction of the membranes is reversed.
- a short pulse is given, the stroke of the membrane concerned will likewise be shorter.
- throttle device 10 can be (partially) replaced.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95203667A EP0781922B1 (de) | 1995-12-28 | 1995-12-28 | Doppelmembranpumpe |
DE69519520T DE69519520T2 (de) | 1995-12-28 | 1995-12-28 | Doppelmembranpumpe |
AT95203667T ATE197837T1 (de) | 1995-12-28 | 1995-12-28 | Doppelmembranpumpe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95203667A EP0781922B1 (de) | 1995-12-28 | 1995-12-28 | Doppelmembranpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0781922A1 true EP0781922A1 (de) | 1997-07-02 |
EP0781922B1 EP0781922B1 (de) | 2000-11-29 |
Family
ID=8221029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95203667A Expired - Lifetime EP0781922B1 (de) | 1995-12-28 | 1995-12-28 | Doppelmembranpumpe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0781922B1 (de) |
AT (1) | ATE197837T1 (de) |
DE (1) | DE69519520T2 (de) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015119717A1 (en) * | 2014-02-07 | 2015-08-13 | Graco Minnesota Inc. | Pulseless positive displacement pump and method of pulselessly displacing fluid |
US10919060B2 (en) | 2008-10-22 | 2021-02-16 | Graco Minnesota Inc. | Portable airless sprayer |
US10926275B1 (en) | 2020-06-25 | 2021-02-23 | Graco Minnesota Inc. | Electrostatic handheld sprayer |
US10968903B1 (en) | 2020-06-04 | 2021-04-06 | Graco Minnesota Inc. | Handheld sanitary fluid sprayer having resilient polymer pump cylinder |
US11022106B2 (en) | 2018-01-09 | 2021-06-01 | Graco Minnesota Inc. | High-pressure positive displacement plunger pump |
US11174854B2 (en) | 2020-03-31 | 2021-11-16 | Graco Minnesota Inc. | Electrically operated displacement pump control system and method |
CN114922801A (zh) * | 2022-04-27 | 2022-08-19 | 上海侠飞泵业有限公司 | 高压气动隔膜泵 |
US11707753B2 (en) | 2019-05-31 | 2023-07-25 | Graco Minnesota Inc. | Handheld fluid sprayer |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10354314B4 (de) * | 2003-11-20 | 2006-06-01 | Thomas Kwapis | Unterwassermotorschlitten |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2518660A1 (fr) * | 1981-12-23 | 1983-06-24 | Champion Spark Plug Co | Pompe a diaphragmes |
US4818191A (en) * | 1982-03-31 | 1989-04-04 | Neyra Industries, Inc. | Double-acting diaphragm pump system |
EP0386610A1 (de) * | 1989-03-07 | 1990-09-12 | John Russell Schneider | Gleichstrompumpe |
WO1992019867A1 (de) * | 1991-05-03 | 1992-11-12 | Hans Willi Meinz | Verfahren und vorrichtung zur kontrollierten dosierung mindestenseiner fliessfähigen komponente |
-
1995
- 1995-12-28 EP EP95203667A patent/EP0781922B1/de not_active Expired - Lifetime
- 1995-12-28 DE DE69519520T patent/DE69519520T2/de not_active Expired - Fee Related
- 1995-12-28 AT AT95203667T patent/ATE197837T1/de not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2518660A1 (fr) * | 1981-12-23 | 1983-06-24 | Champion Spark Plug Co | Pompe a diaphragmes |
US4818191A (en) * | 1982-03-31 | 1989-04-04 | Neyra Industries, Inc. | Double-acting diaphragm pump system |
EP0386610A1 (de) * | 1989-03-07 | 1990-09-12 | John Russell Schneider | Gleichstrompumpe |
WO1992019867A1 (de) * | 1991-05-03 | 1992-11-12 | Hans Willi Meinz | Verfahren und vorrichtung zur kontrollierten dosierung mindestenseiner fliessfähigen komponente |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10919060B2 (en) | 2008-10-22 | 2021-02-16 | Graco Minnesota Inc. | Portable airless sprayer |
US11779945B2 (en) | 2008-10-22 | 2023-10-10 | Graco Minnesota Inc. | Portable airless sprayer |
US11759808B1 (en) | 2008-10-22 | 2023-09-19 | Graco Minnesota Inc. | Portable airless sprayer |
US11623234B2 (en) | 2008-10-22 | 2023-04-11 | Graco Minnesota Inc. | Portable airless sprayer |
US11446689B2 (en) | 2008-10-22 | 2022-09-20 | Graco Minnesota Inc. | Portable airless sprayer |
US11446690B2 (en) | 2008-10-22 | 2022-09-20 | Graco Minnesota Inc. | Portable airless sprayer |
CN105980709B (zh) * | 2014-02-07 | 2018-01-19 | 固瑞克明尼苏达有限公司 | 无脉冲式正排量泵和无脉冲式排出流体的方法 |
US9777722B2 (en) | 2014-02-07 | 2017-10-03 | Graco Minnesota Inc. | Pulseless positive displacement pump and method of pulselessly displacing fluid |
US10161393B2 (en) | 2014-02-07 | 2018-12-25 | Graco Minnesota Inc. | Mechanical drive system for a pulseless positive displacement pump |
WO2015119717A1 (en) * | 2014-02-07 | 2015-08-13 | Graco Minnesota Inc. | Pulseless positive displacement pump and method of pulselessly displacing fluid |
US11867165B2 (en) | 2014-02-07 | 2024-01-09 | Graco Minnesota Inc. | Drive system for a positive displacement pump |
CN105980709A (zh) * | 2014-02-07 | 2016-09-28 | 固瑞克明尼苏达有限公司 | 无脉冲式正排量泵和无脉冲式排出流体的方法 |
US9638185B2 (en) | 2014-02-07 | 2017-05-02 | Graco Minnesota Inc. | Pulseless positive displacement pump and method of pulselessly displacing fluid |
US10072650B2 (en) | 2014-02-07 | 2018-09-11 | Graco Minnesota, Inc. | Method of pulselessly displacing fluid |
US9784265B2 (en) | 2014-02-07 | 2017-10-10 | Graco Minnesota Inc. | Electric drive system for a pulseless positive displacement pump |
US9777721B2 (en) | 2014-02-07 | 2017-10-03 | Graco Minnesota Inc. | Hydraulic drive system for a pulseless positive displacement pump |
US11022106B2 (en) | 2018-01-09 | 2021-06-01 | Graco Minnesota Inc. | High-pressure positive displacement plunger pump |
US11707753B2 (en) | 2019-05-31 | 2023-07-25 | Graco Minnesota Inc. | Handheld fluid sprayer |
US11655810B2 (en) | 2020-03-31 | 2023-05-23 | Graco Minnesota Inc. | Electrically operated displacement pump control system and method |
US11434892B2 (en) | 2020-03-31 | 2022-09-06 | Graco Minnesota Inc. | Electrically operated displacement pump assembly |
US11174854B2 (en) | 2020-03-31 | 2021-11-16 | Graco Minnesota Inc. | Electrically operated displacement pump control system and method |
US10968903B1 (en) | 2020-06-04 | 2021-04-06 | Graco Minnesota Inc. | Handheld sanitary fluid sprayer having resilient polymer pump cylinder |
US11738358B2 (en) | 2020-06-25 | 2023-08-29 | Graco Minnesota Inc. | Electrostatic handheld sprayer |
US10926275B1 (en) | 2020-06-25 | 2021-02-23 | Graco Minnesota Inc. | Electrostatic handheld sprayer |
CN114922801A (zh) * | 2022-04-27 | 2022-08-19 | 上海侠飞泵业有限公司 | 高压气动隔膜泵 |
CN114922801B (zh) * | 2022-04-27 | 2023-11-28 | 上海侠飞泵业有限公司 | 高压气动隔膜泵 |
Also Published As
Publication number | Publication date |
---|---|
ATE197837T1 (de) | 2000-12-15 |
DE69519520D1 (de) | 2001-01-04 |
EP0781922B1 (de) | 2000-11-29 |
DE69519520T2 (de) | 2001-06-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA1134332A (en) | Precision material filling systems | |
EP0781922B1 (de) | Doppelmembranpumpe | |
EP1030972B1 (de) | Ausgabegerät für eine maschine zur ausgabe von flüssigkeit sowie maschine,die ein solches ausgabegerät beinhaltet | |
US4540349A (en) | Air driven pump | |
US4863066A (en) | System for dispensing precisely metered quantities of a fluid and method of utilizing the system | |
US4026439A (en) | Precision fluid dispensing and mixing system | |
US4771726A (en) | Apparatus for dispensing flowable materials | |
GB2071785A (en) | Arrangement for pulsation-free delivery of a liquid medium especially road-marking machine with expulsion pumps for pulsation-free delivery of the marking material | |
JP4598377B2 (ja) | 複数成分の計量及び分配装置 | |
EP1455567B2 (de) | Dauerdosierung und -korrektur verwendende elektronische dosiervorrichtung | |
US4708603A (en) | Variable displacement pump | |
US5961303A (en) | Positive displacement dispensing pump system | |
EP0248514B1 (de) | System und Verfahren zur Abgabe von abgemessenen Flüssigkeitsmengen | |
TW336977B (en) | A variable displacement metering pump and a method of operating the same | |
US20050089428A1 (en) | Pump pulsation dampening attachment and method for dampening pump pulsations | |
EP0386610A1 (de) | Gleichstrompumpe | |
RU2003170C1 (ru) | Способ выброса воздуха из установки дл наполнени емкости заданным количеством жидкости и устройство дл его осуществлени | |
EP0479559A1 (de) | Vorrichtung zum Füllen von Behältern mit Flüssigkeiten | |
CA2222927A1 (en) | Apparatus and method for dispensing fluid material | |
EP1762138B1 (de) | Elektronische proportionierpumpe mit ununterbrochener messung und korrektur | |
US3637116A (en) | Fluid-operated piston for metering gravity fed material | |
CN2361099Y (zh) | 一种高精度定量供液装置 | |
CN1086120C (zh) | 一种高精度定量供液(气)体的方法及装置 | |
EP0928412B1 (de) | Flüssigkeitsmessverfahren | |
CN216401863U (zh) | 灌装效率高的环保型计量泵及其控制装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE |
|
17P | Request for examination filed |
Effective date: 19971201 |
|
17Q | First examination report despatched |
Effective date: 19991123 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20001129 Ref country code: GR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001129 Ref country code: ES Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 20001129 Ref country code: CH Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20001129 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20001129 |
|
REF | Corresponds to: |
Ref document number: 197837 Country of ref document: AT Date of ref document: 20001215 Kind code of ref document: T |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001228 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001228 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20001229 Year of fee payment: 6 Ref country code: FR Payment date: 20001229 Year of fee payment: 6 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001231 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20001231 Year of fee payment: 6 |
|
REF | Corresponds to: |
Ref document number: 69519520 Country of ref document: DE Date of ref document: 20010104 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20010112 Year of fee payment: 6 |
|
ITF | It: translation for a ep patent filed |
Owner name: SAMA PATENTS |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010129 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20010228 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20010228 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20010228 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
BERE | Be: lapsed |
Owner name: VAN WIJK ENGINEERING B.V. Effective date: 20001231 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20011228 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020701 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020702 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20011228 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020830 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20020701 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051228 |