DE10351222A1 - Membrane pump used for conveying a medium for treating exhaust gases in diesel engines comprises a suction side and a pressure side that are short-circuited by a self-cleaning throttle point bridging a sealing region - Google Patents
Membrane pump used for conveying a medium for treating exhaust gases in diesel engines comprises a suction side and a pressure side that are short-circuited by a self-cleaning throttle point bridging a sealing region Download PDFInfo
- Publication number
- DE10351222A1 DE10351222A1 DE10351222A DE10351222A DE10351222A1 DE 10351222 A1 DE10351222 A1 DE 10351222A1 DE 10351222 A DE10351222 A DE 10351222A DE 10351222 A DE10351222 A DE 10351222A DE 10351222 A1 DE10351222 A1 DE 10351222A1
- Authority
- DE
- Germany
- Prior art keywords
- diaphragm pump
- membrane
- suction
- pump according
- pressure
- 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.)
- Withdrawn
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
- F04B43/025—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel
- F04B43/026—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel each plate-like pumping flexible member working in its own pumping chamber
-
- 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
- F04B53/10—Valves; Arrangement of valves
- F04B53/1037—Flap valves
- F04B53/1047—Flap valves the valve being formed by one or more flexible elements
- F04B53/106—Flap valves the valve being formed by one or more flexible elements the valve being a membrane
- F04B53/1065—Flap valves the valve being formed by one or more flexible elements the valve being a membrane fixed at its centre
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Die Erfindung betrifft eine Membranpumpe für ein flüssiges Medium nach dem Oberbegriff des Anspruches 1.The The invention relates to a diaphragm pump for a liquid medium according to the preamble of claim 1.
Membranpumpen werden in vielen Bereichen eingesetzt, häufig als Dosierpumpen im Lebensmittelbereich oder in der Labortechnik. Die Ventile der Membranpumpe sind so dicht, daß bei abgeschalteter Membranpumpe der Druck eines eingesperrten Flüssigkeitsvolumens aufrecht erhalten bleibt.diaphragm pumps are used in many areas, often as dosing pumps in the food industry or in laboratory technology. The valves of the diaphragm pump are so tight that at disconnected diaphragm pump the pressure of a trapped fluid volume is maintained.
Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Membranpumpe so auszubilden, daß der Druck eines im System eingesperrten Flüssigkeitsvolumens nach Abschalten der Membranpumpe über einen bestimmten Zeitraum langsam abgebaut wird.Of the Invention is based on the object, the generic diaphragm pump so that the Pressure of a fluid volume trapped in the system after shutdown the diaphragm pump over is slowly reduced over a certain period of time.
Diese Aufgabe wird bei der gattungsgemäßen Membranpumpe erfindungsgemäß mit den kennzeichnenden Merkmalen des Anspruches 1 gelöst.These Task is in the generic diaphragm pump according to the invention with the characterizing Characteristics of claim 1 solved.
Bei der erfindungsgemäßen Membranpumpe sorgt die Drosselstelle dafür, daß der Druck eines eingesperrten Flüssigkeitsvolumens innerhalb einer vorgegebenen Zeit abgebaut wird. Die Größe der Drosselstelle richtet sich danach, wie groß das eingesperrte Flüssigkeitsvolumen ist und innerhalb welcher Zeit dementsprechend der Druck dieses Mediums abgebaut werden muß. Da dieser Drosselquerschnitt sehr klein ist, würde er sich über die Zeit zusetzen und dadurch un wirksam. Um dies zu verhindern, wurde der Drosselquerschnitt auf die Membrane gelegt. Diese wird bei jeder Bestätigung verformt. Dadurch werden eventuell anhaftende Partikel abgeworfen. Die Drosselstelle wird während des Betriebs von selbst gereinigt. Die erfindungsgemäße Membranpumpe wird vorteilhaft zur Förderung eines Mediums für die Abgasnachbehandlung bei Dieselmotoren eingesetzt. Das Medium ist hierbei eine 32,5%ige Harnstoff-Wasser-Lösung. Sie wird in bekannter Weise in den Abgasstrom des Dieselmotors eingesprüht. Im Winter kann das Medium bei entsprechend tiefen Außentemperaturen gefrieren. Das in der Membranpumpe und im System eingesperrte Medium würde beim Einfrieren, wenn es unter Druck steht, erhebliche Schädigungen der Membranpumpe und/oder vor- bzw. nachgeordneter Bauteile des Dieselmotores hervorrufen. Infolge der erfindungsgemäßen Ausbildung kann der Druck des im System eingeschlossenen Flüssigkeitsvolumens jedoch über die Drosselstelle abgebaut werden, so daß beim Einfrieren das Medium nicht unter Druck steht. Die Drosselstelle ist so gestaltet, daß sie das Pumpverhalten der Membranpumpe bei normalem Betrieb nicht beeinträchtigt.at the membrane pump according to the invention the throttle point ensures that the Pressure of a trapped fluid volume is reduced within a predetermined time. The size of the throttle depends on how big that trapped fluid volumes is and within what time accordingly the pressure of this Medium must be removed. Since this throttle cross-section is very small, it would be over the Time and thus ineffective. To prevent this, was the throttle section is placed on the diaphragm. This one is at everyone confirmation deformed. As a result, any adhering particles are dropped. The throttle point is during the plant cleaned by itself. The diaphragm pump according to the invention will be beneficial for promotion a medium for the exhaust aftertreatment used in diesel engines. The medium Here is a 32.5% urea-water solution. It is sprayed in a known manner in the exhaust stream of the diesel engine. In the winter The medium can freeze at correspondingly low outside temperatures. The caged in the diaphragm pump and in the system medium would Freezing, when under pressure, causes serious damage the diaphragm pump and / or upstream or downstream components of Diesel engines cause. As a result of the inventive training However, the pressure of the trapped in the system volume of liquid on the Throttle be degraded, so that when freezing the medium not under pressure. The throttle point is designed so that they Pumping behavior of the diaphragm pump is not impaired during normal operation.
Weitere Merkmale der Erfindung ergeben sich aus den weiteren Ansprüchen, der Beschreibung und den Zeichnungen.Further Features of the invention will become apparent from the other claims, the Description and the drawings.
Die Erfindung wird anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles näher erläutert. Es zeigenThe The invention will be explained in more detail with reference to an embodiment shown in the drawings. It demonstrate
Der
Aufbau der Membranpumpe ist an sich bekannt und wird darum nur kurz
erläutert.
Sie hat einen Pumpenkopf
Die
Hubmembran
Die beschriebene Membranpumpe wird bei Abgasnachbehandlungsanlagen von Dieselfahrzeugen eingesetzt. Mit der Membranpumpe wird eine 32,5%ige Harnstoff-Wasser-Lösung einem Abgasstrom zugeführt.The described diaphragm pump is in exhaust aftertreatment systems of Used diesel vehicles. With the diaphragm pump is a 32.5% Urea-water solution fed to an exhaust gas stream.
Die
Die
Ventilkörper
Der
Steckansatz
Die
beiden Ringnuten
Der
Querschnitt der Nut
Das
Druckventil
Innenseitig
ist der Ventilkörper
Auf
der Außenseite
des Ventilkörpers
Die
Nuten
Die
Nuten
Claims (14)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10351222A DE10351222A1 (en) | 2003-10-28 | 2003-10-28 | Membrane pump used for conveying a medium for treating exhaust gases in diesel engines comprises a suction side and a pressure side that are short-circuited by a self-cleaning throttle point bridging a sealing region |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10351222A DE10351222A1 (en) | 2003-10-28 | 2003-10-28 | Membrane pump used for conveying a medium for treating exhaust gases in diesel engines comprises a suction side and a pressure side that are short-circuited by a self-cleaning throttle point bridging a sealing region |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10351222A1 true DE10351222A1 (en) | 2005-06-02 |
Family
ID=34530059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10351222A Withdrawn DE10351222A1 (en) | 2003-10-28 | 2003-10-28 | Membrane pump used for conveying a medium for treating exhaust gases in diesel engines comprises a suction side and a pressure side that are short-circuited by a self-cleaning throttle point bridging a sealing region |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10351222A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19639555C1 (en) * | 1996-09-26 | 1997-11-20 | Knf Neuberger Gmbh | Reciprocating machine such as membrane pump or piston compressor |
US5791882A (en) * | 1996-04-25 | 1998-08-11 | Shurflo Pump Manufacturing Co | High efficiency diaphragm pump |
DE10117531A1 (en) * | 2001-04-07 | 2002-10-17 | Quattroflow Fluid Systems Gmbh | Membrane pump for pumping gaseous, liquid and pasty materials comprises a membrane valve having a holding-down device preventing downstream lifting of a valve membrane from a valve plate |
-
2003
- 2003-10-28 DE DE10351222A patent/DE10351222A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5791882A (en) * | 1996-04-25 | 1998-08-11 | Shurflo Pump Manufacturing Co | High efficiency diaphragm pump |
DE19639555C1 (en) * | 1996-09-26 | 1997-11-20 | Knf Neuberger Gmbh | Reciprocating machine such as membrane pump or piston compressor |
DE10117531A1 (en) * | 2001-04-07 | 2002-10-17 | Quattroflow Fluid Systems Gmbh | Membrane pump for pumping gaseous, liquid and pasty materials comprises a membrane valve having a holding-down device preventing downstream lifting of a valve membrane from a valve plate |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8110 | Request for examination paragraph 44 | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20120501 |