WO2014016388A1 - Dosieranlage sowie dosierpumpe hierfür - Google Patents
Dosieranlage sowie dosierpumpe hierfür Download PDFInfo
- Publication number
- WO2014016388A1 WO2014016388A1 PCT/EP2013/065756 EP2013065756W WO2014016388A1 WO 2014016388 A1 WO2014016388 A1 WO 2014016388A1 EP 2013065756 W EP2013065756 W EP 2013065756W WO 2014016388 A1 WO2014016388 A1 WO 2014016388A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- delivery chamber
- pressure
- metering
- suction
- dosing
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
-
- 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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/06—Venting
Definitions
- the present invention relates to a metering system for metering a liquid metering medium with a suction line which is filled with a metering medium with the liquid pressure ps, and a pressure line which is filled with the metering medium with the liquid pressure pd, wherein the suction line via a trained as a metering pump Dosing is connected to the pressure line. With the help of the dosing pump then dosing can be promoted from the suction line in the pressure line.
- the metering pump has a delivery chamber whose volume can be changed by means of a movable displacement element, for example a membrane, such that in a first position of the displacement element the delivery chamber has a minimum volume V m in and in a second position of the displacement element the delivery chamber has a maximum volume V ma x.
- the delivery chamber is connected via a pressure valve to the pressure line and a suction valve to the suction line, so sucked by an oscillating movement of the displacer in alternation dosing from the suction via the suction valve in the delivery chamber and dosing from the delivery chamber via the pressure valve in the Pressure line can be discharged.
- a movable displacement element for example a membrane
- EP 1 546 557 B1 describes a metering pump in the form of a diaphragm pump.
- the displacer element If, therefore, it is no longer possible for the displacer element to apply a sufficiently high pressure to open the pressure valve, the pumped medium is not pumped, that is to say the desired metering can not take place. In order to be able to leave this fault condition, it is necessary to restore the compressibility to the back pressure pd applied to the pressure port.
- the metering pump has a screwable vent opening to the delivery chamber, which can be opened manually, so that the metering pump does not have to work against the liquid pressure pd, but against the ambient pressure for a short time, so that the gas present in the delivery chamber can escape via the vent opening.
- a manual intervention is necessary.
- Another solution is to equip corresponding vents with an actively controllable valve and to open this valve in periodic sections.
- this method has the disadvantage that the vent opening is also opened when there is no gas in the pumping chamber and therefore a certain leakage current of the pumped medium occurs.
- an additional connection is provided between delivery chamber on the one hand and pressure connection on the other hand, which is opened intermittently to allow liquid to re-enter from the pressure line into the delivery chamber, whereby gas can simultaneously escape from the delivery chamber so that the ratio between compressible gases and incompressible fluids improves again and, ideally, the back pressure pd applied to the pressure port can be reached again in the delivery chamber.
- this solution is relatively complex, since in addition to an additional bypass line, a valve closing this and a driving device for driving the valve must be provided.
- the intermittent opening of the bypass valve reduces the efficiency of the pump, since the opening takes place even if no gas is contained in the pumping chamber.
- the exponent ⁇ is also referred to as adiabatic exponent and is a physical quantity describing the ratio of the specific heat capacity of a medium at constant pressure to the specific heat capacity of the medium at constant volume.
- the value ⁇ is different for each gas and also temperature-dependent. However, it has been shown that for ⁇ a value of 1.5 can be used to capture all practically relevant use cases.
- the displacement element must be able to withstand the back pressure, i. work the pressure pd on the pressure line. Since usually the delivery chamber is connected via a check valve to the pressure line, the displacer has to work against the spring of the check valve and optionally - depending on the arrangement of the closing body of the valve - against the weight of the closing body.
- the ratio of the maximum volume V ma x and the minimum volume V m in the delivery chamber is chosen so large that even when the delivery space is completely filled with air, the necessary pressure pd can be achieved.
- the liquid pressure of the metering medium in the suction line p s will correspond to the atmospheric pressure, but also applications are conceivable in which the suction line is already under positive or negative pressure.
- V ma x and V m are ratios between V ma x and V m in thus depends on the expected liquid pressure pd in the pressure line.
- the metering system in the pressure line to a liquid pressure pd> 7 bar, preferably pd> 10 bar and best pd> 16 bar. Especially at such high liquid pressures is a reliable vent for accurate dosing advantage.
- the appropriate choice of the ratio between the maximum volume and the minimum volume of the delivery chamber ensures that a dosing, in which the metering pump is used, ensures for most applications that even when completely filled with air delivery chamber, the inherent compressibility of the metering pump large enough is to promote the air from the delivery chamber against the liquid pressure pd of the pressure line.
- a third position of the displacement element in which the delivery chamber has a working volume VA, where Vmin ⁇ VA ⁇ V ma x, and Dosing pump has two modes of operation, wherein in a metering mode, the displacer is reciprocated between the first and the second position or between the second and the third position, and is reciprocated in a venting mode between the first and the second position.
- V ma x - V m the maximum stroke volume (V ma x - V m) is achieved only during the bleeding mode, whereby during the normal dispensing stroke volume only (V ma x - VA) - or is (Vmin V A).
- a smaller stroke volume and, concomitantly, a smaller stroke of the displacement element can, in particular when the displacement element is designed as a membrane, extend the service life of the displacement element. Therefore, in a preferred embodiment, form provided that the maximum stroke takes place only in the venting mode, while in dosing only a reduced stroke takes place.
- a device which switches the metering pump at regular intervals for a short time in the venting mode.
- the metering pump could be switched to the venting mode every fiftieth or every two hundredth stroke for one stroke, whereby any gaseous medium possibly located in the delivery chamber is reliably pushed out of the delivery chamber.
- the metering pump may also have a device for detecting a gaseous medium in the delivery chamber, so that a control device may be provided which switches the metering pump in the venting mode when the detection device detects gaseous medium in the head.
- Figure 1 shows a cross section through a dosing of a metering pump according to the invention and Figure 2 is a perspective plan view of the embodiment shown in Figure 1.
- FIG. 1 shows a sectional view through a metering head of an embodiment of a metering pump according to the invention.
- the dosing head 10 has a displacement element 1, which is connected to a membrane 2. Due to the movement of the displacement element 1, the membrane 2 is moved back and forth, so that the volume of the delivery chamber 3 changes.
- the delivery chamber 3 is connected to a suction port 5 via two series-connected check valves 8, 9, which form the suction valve.
- a suction line of a dosing system can be connected to the suction connection 5, so that dosing medium is sucked out of the suction line into the delivery chamber 3, when the membrane 2 moves together with the displacement element 1 such that the volume of the delivery chamber 3 increases.
- the delivery chamber 3 is also connected to a pressure port 4 via two check valves 6, 7 arranged in series, which together form the pressure valve.
- the pressure connection can be connected to the pressure line of a metering system, so that when the membrane 2 moves together with the displacement element 1 such that the volume of the delivery chamber 3 is reduced, metering via the two check valves 6, 7 and the pressure port 4 in the Pressure line is pressed.
- FIG. 2 shows a perspective view of the dosing head 10 and one recognizes both the pressure connection 4 and the suction connection 5.
- the delivery chamber 3 consists on the one hand of the space in which the membrane moves back and forth and on the other hand from a pressure channel 1 1, which connects the membrane space with the check valve 7, and a suction channel 12, the membrane space with the check valve 9 connects. Both the pressure channel 1 1 and the suction channel 12 form part of the delivery chamber volume.
- both the pressure channel 1 1 and the suction channel 12 are arranged transversely to the direction of movement of the displacement element 1, that is, the direction of movement of the displacement element closes with the direction of movement of a closing element of the pressure valve and with the direction of movement of a closing element of the suction valve at an angle of about 45 °.
- the ratio V m ax / V m in at about 3.
- this ratio can be selected to be even greater if the metering pump is to pump against high pressures.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13742212.7A EP2877745B1 (de) | 2012-07-27 | 2013-07-25 | Dosieranlage sowie dosierpumpe hierfür |
JP2015523554A JP6339072B2 (ja) | 2012-07-27 | 2013-07-25 | 計量システム及びその軽量ポンプ |
US14/412,695 US9328722B2 (en) | 2012-07-27 | 2013-07-25 | Metering system and metering pump therefor |
RS20160967A RS55478B1 (sr) | 2012-07-27 | 2013-07-25 | Uređaj za doziranje kao i odgovarajuća pumpa za doziranje |
SI201330391A SI2877745T1 (sl) | 2012-07-27 | 2013-07-25 | Dozirni sistem in pa dozirna črpalka zanj |
DK13742212.7T DK2877745T3 (en) | 2012-07-27 | 2013-07-25 | Dosing system as well as a metering pump thereto. |
ES13742212.7T ES2607838T3 (es) | 2012-07-27 | 2013-07-25 | Instalación de dosificación así como bomba dosificadora para la misma |
HRP20161489TT HRP20161489T1 (hr) | 2012-07-27 | 2016-11-11 | Mjerni sustav i pripadajuća pumpa za mjerenje |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012106848.8 | 2012-07-27 | ||
DE102012106848.8A DE102012106848A1 (de) | 2012-07-27 | 2012-07-27 | Dosieranlage sowie Dosierpumpe hierfür |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014016388A1 true WO2014016388A1 (de) | 2014-01-30 |
Family
ID=48877238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2013/065756 WO2014016388A1 (de) | 2012-07-27 | 2013-07-25 | Dosieranlage sowie dosierpumpe hierfür |
Country Status (13)
Country | Link |
---|---|
US (1) | US9328722B2 (de) |
EP (1) | EP2877745B1 (de) |
JP (1) | JP6339072B2 (de) |
DE (1) | DE102012106848A1 (de) |
DK (1) | DK2877745T3 (de) |
ES (1) | ES2607838T3 (de) |
HR (1) | HRP20161489T1 (de) |
HU (1) | HUE030145T2 (de) |
PL (1) | PL2877745T3 (de) |
PT (1) | PT2877745T (de) |
RS (1) | RS55478B1 (de) |
SI (1) | SI2877745T1 (de) |
WO (1) | WO2014016388A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3298276A4 (de) * | 2015-05-21 | 2019-01-23 | Henkel IP & Holding GmbH | Negativrückschlagventil |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985001993A1 (en) * | 1983-11-01 | 1985-05-09 | Ab Rovac | Metering device |
DE19623537A1 (de) * | 1996-06-13 | 1997-12-18 | Bwt Wassertechnik Gmbh | Dosierpumpe und Dosierverfahren für Flüssigkeiten |
EP1546557B1 (de) | 2002-09-27 | 2008-07-30 | Pulsafeeder, Inc. | Dosierpumpe mit gasentfernungsvorrichtung |
EP2362102A1 (de) * | 2010-02-18 | 2011-08-31 | Grundfos Management A/S | Dosierpumpenaggregat |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3330218A (en) * | 1965-06-11 | 1967-07-11 | James H Bumstead | Metering pump |
DE3238421A1 (de) * | 1981-10-17 | 1983-05-05 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Foerdereinrichtung fuer fluessige oder gasfoermige medien |
JPH0512669U (ja) * | 1991-07-26 | 1993-02-19 | 日本フイーダー工業株式会社 | 往復動ポンプのストローク調整機構 |
WO1996035876A1 (de) * | 1995-05-11 | 1996-11-14 | Sawatzki Harry L | Fördervorrichtung |
DE10238600A1 (de) * | 2002-08-22 | 2004-03-04 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Peristaltische Mikropumpe |
US7665974B2 (en) * | 2007-05-02 | 2010-02-23 | Wanner Engineering, Inc. | Diaphragm pump position control with offset valve axis |
US8128378B2 (en) * | 2007-07-30 | 2012-03-06 | Honeywell International Inc. | Dual mode compensation for variable displacement pump fluid metering system |
-
2012
- 2012-07-27 DE DE102012106848.8A patent/DE102012106848A1/de not_active Withdrawn
-
2013
- 2013-07-25 EP EP13742212.7A patent/EP2877745B1/de active Active
- 2013-07-25 RS RS20160967A patent/RS55478B1/sr unknown
- 2013-07-25 DK DK13742212.7T patent/DK2877745T3/en active
- 2013-07-25 SI SI201330391A patent/SI2877745T1/sl unknown
- 2013-07-25 PT PT137422127T patent/PT2877745T/pt unknown
- 2013-07-25 US US14/412,695 patent/US9328722B2/en active Active
- 2013-07-25 ES ES13742212.7T patent/ES2607838T3/es active Active
- 2013-07-25 WO PCT/EP2013/065756 patent/WO2014016388A1/de active Application Filing
- 2013-07-25 JP JP2015523554A patent/JP6339072B2/ja active Active
- 2013-07-25 HU HUE13742212A patent/HUE030145T2/en unknown
- 2013-07-25 PL PL13742212T patent/PL2877745T3/pl unknown
-
2016
- 2016-11-11 HR HRP20161489TT patent/HRP20161489T1/hr unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985001993A1 (en) * | 1983-11-01 | 1985-05-09 | Ab Rovac | Metering device |
DE19623537A1 (de) * | 1996-06-13 | 1997-12-18 | Bwt Wassertechnik Gmbh | Dosierpumpe und Dosierverfahren für Flüssigkeiten |
EP1546557B1 (de) | 2002-09-27 | 2008-07-30 | Pulsafeeder, Inc. | Dosierpumpe mit gasentfernungsvorrichtung |
EP2362102A1 (de) * | 2010-02-18 | 2011-08-31 | Grundfos Management A/S | Dosierpumpenaggregat |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3298276A4 (de) * | 2015-05-21 | 2019-01-23 | Henkel IP & Holding GmbH | Negativrückschlagventil |
US10823166B2 (en) | 2015-05-21 | 2020-11-03 | Henkel IP & Holding GmbH | Negating check valve |
Also Published As
Publication number | Publication date |
---|---|
DK2877745T3 (en) | 2016-12-12 |
ES2607838T3 (es) | 2017-04-04 |
US20150159639A1 (en) | 2015-06-11 |
DE102012106848A1 (de) | 2014-01-30 |
EP2877745A1 (de) | 2015-06-03 |
PL2877745T3 (pl) | 2017-05-31 |
PT2877745T (pt) | 2016-12-30 |
JP2015522761A (ja) | 2015-08-06 |
US9328722B2 (en) | 2016-05-03 |
JP6339072B2 (ja) | 2018-06-06 |
HUE030145T2 (en) | 2017-04-28 |
HRP20161489T1 (hr) | 2016-12-16 |
SI2877745T1 (sl) | 2016-12-30 |
RS55478B1 (sr) | 2017-04-28 |
EP2877745B1 (de) | 2016-10-12 |
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