WO2004007960A1 - Mehrlagenmembran - Google Patents
Mehrlagenmembran Download PDFInfo
- Publication number
- WO2004007960A1 WO2004007960A1 PCT/EP2003/006229 EP0306229W WO2004007960A1 WO 2004007960 A1 WO2004007960 A1 WO 2004007960A1 EP 0306229 W EP0306229 W EP 0306229W WO 2004007960 A1 WO2004007960 A1 WO 2004007960A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- individual
- pump
- membranes
- layer membrane
- membrane according
- 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
- 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
- F04B43/0054—Special features particularities of the flexible members
-
- 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
- F04B43/009—Special features systems, control, safety measures leakage control; pump systems with two flexible members; between the actuating element and the pumped fluid
Definitions
- the present invention relates to a multi-layer membrane according to the features of preamble 1 and to a pump having the multi-layer membrane for conveying a fluid medium.
- a generic multi-layer membrane is known from EP 0 582 628 AI.
- This multilayer membrane is characterized in that the dome-shaped individual membranes are mechanically connected to one another in the middle, in which a connecting part is vulcanized into a single membrane.
- This connecting part extends through the other individual membrane with a molded-on part.
- the molded-on part has an external thread onto which a nut can be screwed, which, together with two membrane plates, presses the two individual membranes against one another, thus firmly securing the individual membranes in their central area. connects each other.
- the two individual membranes are firmly clamped by the housing halves in a circumferential clamping point, which is formed by the two housing halves of the pump.
- This construction disadvantageously requires a high accuracy of the mechanical connection in the middle area of the individual membranes. If the individual membranes are not centrally connected in the middle, which may be due to an eccentrically punched or drilled hole through the second individual membrane, the two individual membranes are clamped against each other by clamping in the clamping point by lateral force. This results in tensile and compressive forces in the diaphragms, since the diaphragms cannot escape due to the central connection and the lateral clamping in the housing. Due to the forces described above, flexing work takes place around the vulcanized connecting part and on the outer edge of the membrane plate, which causes cracks in the membranes, which lead to premature wear of the individual membranes.
- the mobility of the individual membranes is also severely restricted by the mechanical connection in the middle area of the membranes.
- the central mechanical connection also requires the two membranes to be sealed against one another so that there is no leakage.
- the additional seals disadvantageously cause additional sources of error during assembly.
- the complex structure of the multi-layer membrane also causes disadvantageously high manufacturing costs.
- the multilayer membrane according to the invention is advantageously characterized in that the two individual membranes are not connected to one another in the central region.
- the individual diaphragms are only mechanically pressurized against one another by the clamping point of the pump and are held in position with respect to one another.
- there are no tensile and compressive forces in the individual membranes which advantageously reduces wear due to internal flexing forces.
- they are inserted and adjusted together or one after the other in a clamping point of a housing part, after which the second housing half is mechanically connected to the first housing half, in particular by means of a screw connection.
- the multilayer membrane according to the invention is thus advantageously simple to install and low-wear.
- a lubricating film can be provided between the individual membranes lying one on top of the other to reduce the frictional forces, which also reduces the forces for moving the multi-layer membrane.
- the space between the individual membranes which is advantageously reduced to a minimum by a vacuum, can also be used to accommodate a leak detection medium. If no additional leakage detection medium is used, a medium that has passed through a single membrane due to a leakage is guided through the space to a leakage detection device.
- each individual membrane is advantageous dome-like shaped membranes. They are also advantageous stalt that they are arched from the clamping point to the central area only in one direction from the plane forming the clamping point, the central area of the membranes being on the other side of the plane, provided the membranes are unloaded.
- each individual membrane advantageously has a line of curvature which has at least two turning points starting from the edge region of the membrane, ie from the clamping point to the center region.
- the areas of the adjoining surfaces of the two individual membranes are of the same size in the mechanically unstressed state. This advantageously minimizes the friction when the membranes are deformed while the pump is operating. At the same time, the thickness of both individual membranes, in particular over their entire area, should be the same.
- the diameter of the neutral fibers of the circular individual membranes can be the same size in a further or the same embodiment, which likewise minimizes the internal flexing forces in the membranes.
- the individual membranes are made of a rubber-like material such as e.g. VITON® or EPDM® are manufactured, with a PTFE film being vulcanized on each flat side of one or both individual membranes for chemical resistance.
- Fig. 1 u. 2 cross-sectional representations through a multi-layer membrane, consisting of two individual membranes placed one on top of the other;
- Figures 1 and 2 show a cross-sectional view through a multi-layer membrane 1, which consists of two superimposed or lying individual membranes 2 and 3.
- a lubricating film can be applied to the contact surfaces A of the individual membranes 2 and 3 between the individual membranes 2 and 3.
- films, in particular made of PTFE films can be vulcanized onto the outwardly facing surfaces 2b and 3b.
- the individual membranes 2 and 3 have collar-like or bead-shaped circumferential projections, through which the individual membranes 2 and 3, as can be seen from FIG 4b 'are held in position.
- Figure 2 illustrates the shape of the multilayer membrane.
- the two individual membranes 2 and 3 first curve in the direction R1. Then there is one Reversal of direction and the individual membranes 2 and 3 bulge with their central area M in the direction R2, the first curvature W1 being smaller in terms of its deflection AI than the curvature W2 with its deflection A2 - measured in each case from the plane E, which is caused by the Clamping point is defined.
- the neutral fibers N2 and N3 are due to the uniform thickness of the two individual membranes 2 and 3 over the entire surface of the membranes directly in the middle of each individual membrane 2 and 3.
- the curvatures W1 and W2 are advantageous in terms of their deflections AI and A2 to be designed so that the total areas of the neutral fibers N2 and N3 are the same size.
- the thicknesses of the individual membranes and their deflections AI and A2 or their shape can be selected so that the contact surfaces A of both individual membranes 2 and 3 are also of the same size.
- FIG. 3 shows the clamping point 4a 'and 4b' formed by the two housing halves 4a and 4b.
- the clamping points 4a 'and 4b' are formed by circumferential grooves in the housing halves 4a and 4b, the cross-sectional shape of the grooves corresponding at least approximately to that of the edge regions 2a and 2b of the individual membranes 2 and 3, in particular in terms of shape and / or type ,
- the edge areas 2a and 2b of the individual membranes 2 and 3 are slightly larger in terms of their volume or their cross-sectional area than the grooves 4a ⁇ and 4b ⁇ , so that there is a tightness between the individual membranes 2 and 3 when the individual membranes 2 and 3 are clamped or clamped 3 and the housing halves 4a and 4b.
- the cavities 7 and 8, which are separated from one another by the individual membranes 2 and 3, are shaped in terms of their surface design so that the individual membranes 2 and 3 can each abut against them without the individual membranes 2 and 3 being stretched.
- the clamping point formed by the circumferential grooves 4a 'and 4b' is connected via a channel 5 to a leakage detection device 6. If one of the individual membranes 2 and 3 is leaking, the medium enters from the cavity 7 or 8 through the leaky individual membrane 2 or 3 into the space between the two individual membranes 2 and 3 where it passes from there via the channel 5 Leakage indicator 6 arrives.
- the shape of the two individual membranes can differ from the illustrated individual membranes 2 and 3 without deviating from the inventive concept.
- the first curvature W1 can also be larger than the curvature W2 in terms of its deflection AI.
- materials other than rubber can also be used for the individual membranes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003281062A AU2003281062A1 (en) | 2002-07-15 | 2003-06-13 | Multilayer membrane |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10231920A DE10231920B4 (de) | 2002-07-15 | 2002-07-15 | Mehrlagen-Membran |
DE10231920.0 | 2002-07-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004007960A1 true WO2004007960A1 (de) | 2004-01-22 |
Family
ID=30009989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/006229 WO2004007960A1 (de) | 2002-07-15 | 2003-06-13 | Mehrlagenmembran |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2003281062A1 (de) |
DE (1) | DE10231920B4 (de) |
WO (1) | WO2004007960A1 (de) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1712796A1 (de) * | 2005-04-12 | 2006-10-18 | J. Wagner AG | Membranpumpe |
WO2014095898A1 (en) * | 2012-12-21 | 2014-06-26 | Tetra Laval Holdings & Finance S.A. | A piston pump arrangement for hygienic processing applications |
US9084845B2 (en) | 2011-11-02 | 2015-07-21 | Smith & Nephew Plc | Reduced pressure therapy apparatuses and methods of using same |
US9427505B2 (en) | 2012-05-15 | 2016-08-30 | Smith & Nephew Plc | Negative pressure wound therapy apparatus |
US9901664B2 (en) | 2012-03-20 | 2018-02-27 | Smith & Nephew Plc | Controlling operation of a reduced pressure therapy system based on dynamic duty cycle threshold determination |
US9956121B2 (en) | 2007-11-21 | 2018-05-01 | Smith & Nephew Plc | Wound dressing |
CN109367145A (zh) * | 2018-08-16 | 2019-02-22 | 西安航天动力研究所 | 一种储能器用隔膜及其制造方法 |
US10307517B2 (en) | 2010-09-20 | 2019-06-04 | Smith & Nephew Plc | Systems and methods for controlling operation of a reduced pressure therapy system |
US10682446B2 (en) | 2014-12-22 | 2020-06-16 | Smith & Nephew Plc | Dressing status detection for negative pressure wound therapy |
US20220235757A1 (en) * | 2021-01-25 | 2022-07-28 | Ingersoll-Rand Industrial U.S., Inc. | Diaphragm pump |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB305235A (en) * | 1928-02-02 | 1930-05-01 | Tecalemit Ltd | Means for operating a flexible diaphragm more particularly adapted for diaphragm pumps |
DE1001111B (de) * | 1955-08-06 | 1957-01-17 | Pleuger & Co | Membrankolbenpumpe, insbesondere zur Foerderung von Fluessigkeiten aus grossen Tiefen |
US5062770A (en) * | 1989-08-11 | 1991-11-05 | Systems Chemistry, Inc. | Fluid pumping apparatus and system with leak detection and containment |
WO1992019866A1 (de) * | 1991-05-03 | 1992-11-12 | Hans Willi Meinz | Mehrlagen-membran mit leckage-ableitung für membranpumpen |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1552305A (de) * | 1967-12-15 | 1969-01-03 | ||
FI873787A (fi) * | 1987-09-04 | 1989-03-02 | Altukhova, Lilia Vsevolodovna | Foerbaettring roerande membranmaskin. |
DE9004560U1 (de) * | 1990-04-23 | 1991-08-22 | Bran + Luebbe Gmbh, 2000 Norderstedt, De |
-
2002
- 2002-07-15 DE DE10231920A patent/DE10231920B4/de not_active Expired - Lifetime
-
2003
- 2003-06-13 WO PCT/EP2003/006229 patent/WO2004007960A1/de not_active Application Discontinuation
- 2003-06-13 AU AU2003281062A patent/AU2003281062A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB305235A (en) * | 1928-02-02 | 1930-05-01 | Tecalemit Ltd | Means for operating a flexible diaphragm more particularly adapted for diaphragm pumps |
DE1001111B (de) * | 1955-08-06 | 1957-01-17 | Pleuger & Co | Membrankolbenpumpe, insbesondere zur Foerderung von Fluessigkeiten aus grossen Tiefen |
US5062770A (en) * | 1989-08-11 | 1991-11-05 | Systems Chemistry, Inc. | Fluid pumping apparatus and system with leak detection and containment |
WO1992019866A1 (de) * | 1991-05-03 | 1992-11-12 | Hans Willi Meinz | Mehrlagen-membran mit leckage-ableitung für membranpumpen |
Cited By (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1712796A1 (de) * | 2005-04-12 | 2006-10-18 | J. Wagner AG | Membranpumpe |
KR101291316B1 (ko) | 2005-04-12 | 2013-07-30 | 제이.와그너 아게 | 다이어프램 펌프 |
US9956121B2 (en) | 2007-11-21 | 2018-05-01 | Smith & Nephew Plc | Wound dressing |
US11364151B2 (en) | 2007-11-21 | 2022-06-21 | Smith & Nephew Plc | Wound dressing |
US11351064B2 (en) | 2007-11-21 | 2022-06-07 | Smith & Nephew Plc | Wound dressing |
US11179276B2 (en) | 2007-11-21 | 2021-11-23 | Smith & Nephew Plc | Wound dressing |
US11129751B2 (en) | 2007-11-21 | 2021-09-28 | Smith & Nephew Plc | Wound dressing |
US10016309B2 (en) | 2007-11-21 | 2018-07-10 | Smith & Nephew Plc | Wound dressing |
US10744041B2 (en) | 2007-11-21 | 2020-08-18 | Smith & Nephew Plc | Wound dressing |
US10231875B2 (en) | 2007-11-21 | 2019-03-19 | Smith & Nephew Plc | Wound dressing |
US10555839B2 (en) | 2007-11-21 | 2020-02-11 | Smith & Nephew Plc | Wound dressing |
US11534540B2 (en) | 2010-09-20 | 2022-12-27 | Smith & Nephew Plc | Pressure control apparatus |
US11623039B2 (en) | 2010-09-20 | 2023-04-11 | Smith & Nephew Plc | Systems and methods for controlling operation of a reduced pressure therapy system |
US10307517B2 (en) | 2010-09-20 | 2019-06-04 | Smith & Nephew Plc | Systems and methods for controlling operation of a reduced pressure therapy system |
US11027051B2 (en) | 2010-09-20 | 2021-06-08 | Smith & Nephew Plc | Pressure control apparatus |
US11253639B2 (en) | 2011-11-02 | 2022-02-22 | Smith & Nephew Plc | Reduced pressure therapy apparatuses and methods of using same |
US11648342B2 (en) | 2011-11-02 | 2023-05-16 | Smith & Nephew Plc | Reduced pressure therapy apparatuses and methods of using same |
US9084845B2 (en) | 2011-11-02 | 2015-07-21 | Smith & Nephew Plc | Reduced pressure therapy apparatuses and methods of using same |
US10143783B2 (en) | 2011-11-02 | 2018-12-04 | Smith & Nephew Plc | Reduced pressure therapy apparatuses and methods of using same |
US10881764B2 (en) | 2012-03-20 | 2021-01-05 | Smith & Nephew Plc | Controlling operation of a reduced pressure therapy system based on dynamic duty cycle threshold determination |
US11730877B2 (en) | 2012-03-20 | 2023-08-22 | Smith & Nephew Plc | Controlling operation of a reduced pressure therapy system based on dynamic duty cycle threshold determination |
US9901664B2 (en) | 2012-03-20 | 2018-02-27 | Smith & Nephew Plc | Controlling operation of a reduced pressure therapy system based on dynamic duty cycle threshold determination |
US9545465B2 (en) | 2012-05-15 | 2017-01-17 | Smith & Newphew Plc | Negative pressure wound therapy apparatus |
US10299964B2 (en) | 2012-05-15 | 2019-05-28 | Smith & Nephew Plc | Negative pressure wound therapy apparatus |
US10702418B2 (en) | 2012-05-15 | 2020-07-07 | Smith & Nephew Plc | Negative pressure wound therapy apparatus |
US9427505B2 (en) | 2012-05-15 | 2016-08-30 | Smith & Nephew Plc | Negative pressure wound therapy apparatus |
CN104884805A (zh) * | 2012-12-21 | 2015-09-02 | 利乐拉瓦尔集团及财务有限公司 | 一种用于卫生处理应用的活塞泵装置 |
JP2016503852A (ja) * | 2012-12-21 | 2016-02-08 | テトラ・ラヴァル・ホールディングス・アンド・ファイナンス・ソシエテ・アノニムTetra Laval Holdings & Finance S.A. | 衛生加工機器のためのピストンポンプ装置 |
WO2014095898A1 (en) * | 2012-12-21 | 2014-06-26 | Tetra Laval Holdings & Finance S.A. | A piston pump arrangement for hygienic processing applications |
US10973965B2 (en) | 2014-12-22 | 2021-04-13 | Smith & Nephew Plc | Systems and methods of calibrating operating parameters of negative pressure wound therapy apparatuses |
US10737002B2 (en) | 2014-12-22 | 2020-08-11 | Smith & Nephew Plc | Pressure sampling systems and methods for negative pressure wound therapy |
US10780202B2 (en) | 2014-12-22 | 2020-09-22 | Smith & Nephew Plc | Noise reduction for negative pressure wound therapy apparatuses |
US11654228B2 (en) | 2014-12-22 | 2023-05-23 | Smith & Nephew Plc | Status indication for negative pressure wound therapy |
US10682446B2 (en) | 2014-12-22 | 2020-06-16 | Smith & Nephew Plc | Dressing status detection for negative pressure wound therapy |
CN109367145A (zh) * | 2018-08-16 | 2019-02-22 | 西安航天动力研究所 | 一种储能器用隔膜及其制造方法 |
US20220235757A1 (en) * | 2021-01-25 | 2022-07-28 | Ingersoll-Rand Industrial U.S., Inc. | Diaphragm pump |
US11767840B2 (en) * | 2021-01-25 | 2023-09-26 | Ingersoll-Rand Industrial U.S. | Diaphragm pump |
Also Published As
Publication number | Publication date |
---|---|
AU2003281062A1 (en) | 2004-02-02 |
DE10231920B4 (de) | 2006-10-19 |
DE10231920A1 (de) | 2004-02-05 |
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