EP2825774A1 - Verdrängerpumpe mit zwangsentlüftung - Google Patents
Verdrängerpumpe mit zwangsentlüftungInfo
- Publication number
- EP2825774A1 EP2825774A1 EP13709872.9A EP13709872A EP2825774A1 EP 2825774 A1 EP2825774 A1 EP 2825774A1 EP 13709872 A EP13709872 A EP 13709872A EP 2825774 A1 EP2825774 A1 EP 2825774A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- valve
- delivery chamber
- displacement pump
- groove
- 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
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 23
- 238000013022 venting Methods 0.000 title 1
- 238000007872 degassing Methods 0.000 claims abstract description 6
- 238000005086 pumping Methods 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 15
- 239000012530 fluid Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 239000012528 membrane Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010943 off-gassing Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- 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
-
- 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
- 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
-
- 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
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
- F04B7/02—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated
- F04B7/0266—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated the inlet and discharge means being separate members
Definitions
- the present invention relates to a positive displacement pump with a delivery chamber, which is connected to a pressure and a suction port.
- the displacement pump furthermore has a displacement element which determines the volume of the delivery space and which can be moved back and forth between a first position in which the delivery space has a smaller volume and a second position in which the delivery space has a larger volume.
- the pressure connection is usually connected to the delivery chamber via a pressure valve and the suction connection is connected to the delivery chamber via a suction valve.
- the displacer is oscillated between the first and second positions. During the movement of the displacement element from the first to the second position, the volume of the delivery chamber is increased. As a result, if the pressure in the delivery chamber drops below the pressure in a suction line connected to the suction connection, the suction valve opens and the medium to be conveyed is sucked into the delivery chamber via the suction connection. Once the displacer moves from the second position back toward the first position, i. If the volume in the delivery chamber decreases, the pressure in the delivery chamber increases. The suction valve is closed to prevent backflow of the medium to be pumped into the suction line. As soon as the pressure in the delivery chamber exceeds the pressure in a pressure line connected to the pressure connection, the pressure valve is opened so that the delivery medium located in the delivery chamber can be pressed into the delivery line.
- the pumped medium is not pumped, i. the desired dosage can not be made.
- This object is achieved in that, when the pressure valve is closed, a return flow channel conveying space and pressure connection with each other, back flow through the fluid from the pressure line into the pumping chamber and / or gas can escape from the pumping chamber into the pressure line.
- This backflow ensures that any gas present in the delivery chamber is compressed and at least partially flushed out of the delivery chamber.
- the return flow channel at its narrowest point has a cross-section which is smaller than 0.5 mm 2 , preferably smaller than 0, 1 mm 2 and most preferably smaller than 0.03 mm 2 .
- the smaller the cross-section of the return flow channel the lower the loss of delivery due to the presence of the return flow channel.
- the return flow channel must be able to conduct a sufficient amount of liquid from the pressure line connected to the pressure line in the pumping chamber. Therefore, it is provided in a preferred embodiment that the return flow channel at its narrowest point has a cross section which is greater than 0.005 mm 2 , preferably greater than 0.01 mm 2 and most preferably greater than 0.015 mm 2 . These values are particularly applicable to low-pressure pumps with a back pressure of up to 20 bar and when using aqueous Promotional media of advantage. At higher back pressures smaller cross-sections may be beneficial. For higher viscosity media, larger cross sections may be beneficial.
- the return flow channel can be arranged as desired, wherein it is preferably to be ensured that the end of the return flow channel connected to the delivery chamber is arranged as far as possible in the upper region of the delivery chamber to ensure that any gas present in the delivery chamber is flushed out via the return flow channel.
- the return flow channel is arranged in the pressure valve, whereby the time-consuming provision of a bypass connection is eliminated.
- the pressure valve has a valve body and a valve seat, wherein the valve body between an open position in which the valve body does not come into contact with the valve seat and the delivery chamber is connected to the pressure port, and a closed position in which the valve body with the Valve seat comes into contact, is reciprocable.
- the valve body may for example consist of a ball which is pressed with or without the aid of a spring in the valve seat.
- valve seat or valve body are designed such that in the closed position between the valve seat and the valve body, the return flow channel is formed.
- connection between the pumping chamber on the one hand and pressure line on the other hand even if the valve body is seated in the valve seat, not completely closed, but it remains a small return flow channel open.
- Such a reflux channel can be realized for example by a bore through the valve seat or the valve body.
- the valve body may have, at its face contacting the valve seat, a groove arranged such that the groove forms the return flow channel in the closed position.
- the valve seat may have a sealing surface arranged such that the valve body contacts the sealing surface in the closed position and does not contact the sealing surface in the open position, the sealing surface having a groove , which is arranged such that the groove in the closed position forms the degassing connection between the delivery chamber and the pressure port.
- This embodiment can be easily realized even with already existing positive displacement pumps by only a corresponding groove is introduced into the sealing surface of the valve seat. It has been found that the groove best has a depth which is less than 0.2 mm, preferably less than 0.1 mm and most preferably between 0.01 and 0.09 mm.
- the groove may have any cross-section, such as rectangular or triangular. However, the best results were obtained when the groove has a curved groove bottom.
- the groove bottom has a radius of curvature which is less than 1 mm, preferably less than 0.5 mm and most preferably between 0.15 mm and 0.4 mm.
- FIG. 1 shows a cross section through a dosing with ball valves of the prior art
- Figure 2 is a perspective view of a first embodiment of a valve seat according to the invention
- Figure 3 shows a second embodiment of a valve seat according to the invention
- Figure 4 is a partial cross-sectional view through the valve seat of the first embodiment.
- the dosing head 5 has a delivery chamber 4, the volume of which is defined by the delivery element 3 designed as a metering diaphragm. As indicated by the double arrow, this dosing membrane 3 can be moved back and forth between two positions, whereby the volume of the delivery chamber 4 can be varied.
- the delivery chamber 4 is on the one hand on the Suction valve 7 connected to a suction line 1 and on the other hand via the pressure valve 6 with a pressure line 2 connectable.
- the pressure valve 6 has a valve seat 10, against which by means of a spring element 9 designed as a valve body ball 8 is pressed. Alternatively, the valve element could also be pressed by means of its weight against the valve seat.
- the suction valve connected to the suction line is constructed in the same way.
- the metering membrane in FIG. 1 is moved to the right, i. increases the volume of the pumping chamber 4, the pressure in the pumping chamber initially decreases until the pressure in the suction line is greater than the pressure in the pumping chamber. Then, the suction valve 7 opens, so that pumped medium is sucked from the suction line into the pumping chamber 4. Now, if the movement of the membrane 3 is reversed, i. the volume in the pumping chamber 4 is reduced again, the pressure in the pumping chamber 4 increases, the suction valve 7 is closed in order to prevent pumped fluid from being pushed back from the pumping chamber 4 into the suction line 1.
- the ball 8 is pressed against the spring force 9, the weight of the ball 8 and the force applied by the medium in the pressure line on the valve ball force from the valve seat 10, so There is an opening between the pumping chamber 4 and the pressure line 2, through which the pumped medium can be transported from the pumping chamber into the pressure line 2.
- the dosing membrane 3 By means of an oscillating movement of the dosing membrane 3, the delivery medium from the suction line can be dosed into the pressure line.
- gas may have formed in the conveying space 4, in particular after a longer standstill of the pump.
- valve seats 10 'and 10 "according to the invention are therefore shown in Figures 2 and 3. These valve seats can be used at the position of the valve seat 10 shown in Figure 1.
- the valve seats have sealing surfaces 1 1, 12, wherein in FIG 2 In the first embodiment, the valve seat has a conical sealing surface, while in the second embodiment shown in FIG. 3 the valve seat has a spherically shaped sealing surface 12. It is understood that the sealing surfaces of the valve seat must be formed corresponding to the shape of the valve body 8.
- the valve seat now has a groove 13, 14, which preferably extends through the entire sealing surface.
- This groove ensures that even when the sealing body 8 rests on the sealing surface 1 1, 12 of the valve seat 10 ', 10 ", a return flow channel is provided by the groove, through which a small amount of fluid from the pressure connection back into the In the embodiments shown in Figures 2 and 3, the grooves 13, 14 bridge the shortest way the sealing surfaces 1 1, 12.
- the groove on not In addition, of course, a plurality of grooves may be provided, which need not necessarily all be arranged in the valve seat, but could for example also be arranged on the outside of the valve body 8.
- FIG. 4 shows a cross section through the groove 13 of the first embodiment of FIG. It can be seen that the groove has a curved groove bottom with a radius of curvature r, resulting in a groove width d and a groove depth t.
- the groove width d is preferably selected in the range between 0.15 and 0.5 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
- Safety Valves (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI201330609A SI2825774T1 (sl) | 2012-03-13 | 2013-03-12 | Iztiskovalna črpalka s prisilnim odzračevanjem |
PL13709872T PL2825774T3 (pl) | 2012-03-13 | 2013-03-12 | Pompa wyporowa z wymuszonym odpowietrzeniem |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201210102088 DE102012102088A1 (de) | 2012-03-13 | 2012-03-13 | Verdrängerpumpe mit Zwangsentlüftung |
PCT/EP2013/054976 WO2013135681A1 (de) | 2012-03-13 | 2013-03-12 | Verdrängerpumpe mit zwangsentlüftung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2825774A1 true EP2825774A1 (de) | 2015-01-21 |
EP2825774B1 EP2825774B1 (de) | 2017-02-01 |
Family
ID=47891684
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13709872.9A Active EP2825774B1 (de) | 2012-03-13 | 2013-03-12 | Verdrängerpumpe mit zwangsentlüftung |
Country Status (12)
Country | Link |
---|---|
US (1) | US10677243B2 (de) |
EP (1) | EP2825774B1 (de) |
JP (1) | JP6266541B2 (de) |
CA (1) | CA2866784C (de) |
DE (1) | DE102012102088A1 (de) |
DK (1) | DK2825774T3 (de) |
ES (1) | ES2621665T3 (de) |
HU (1) | HUE032314T2 (de) |
PL (1) | PL2825774T3 (de) |
PT (1) | PT2825774T (de) |
SI (1) | SI2825774T1 (de) |
WO (1) | WO2013135681A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4977791B1 (ja) | 2011-07-01 | 2012-07-18 | 株式会社タクミナ | ポンプ及びポンプの運転方法 |
DE102014112833A1 (de) | 2014-09-05 | 2016-03-10 | Prominent Gmbh | Verdrängerpumpe mit Fluidreservoir |
DE102016222576A1 (de) | 2016-11-16 | 2018-05-17 | Robert Bosch Gmbh | Ventilanordnung, Bremssystem und Verfahren zum Betreiben einer Ventilanordnung |
US10941868B2 (en) | 2016-12-13 | 2021-03-09 | Iwaki Co., Ltd. | Valve seat and valve structure |
GB2570648B (en) * | 2018-01-26 | 2020-10-14 | Delphi Tech Ip Ltd | Fuel Pump |
CN114746649A (zh) * | 2020-11-09 | 2022-07-12 | 深圳市大疆创新科技有限公司 | 柱塞泵、植保无人机及喷洒设备 |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1151329A (en) * | 1912-06-20 | 1915-08-24 | Christopher H Audett | Gas-generating oil-burner. |
US3727635A (en) * | 1971-07-12 | 1973-04-17 | T Todd | Pressure compensating trickle rate fluid outlet |
US4662392A (en) * | 1983-07-29 | 1987-05-05 | Intevep, S.A. | Check valve |
US4601305A (en) * | 1984-11-29 | 1986-07-22 | Nordskog Robert A | Compact gas compressor check valve |
JPH0249071A (ja) | 1988-08-11 | 1990-02-19 | Dai Ichi Kogyo Seiyaku Co Ltd | 染料分散剤 |
JPH02139375U (de) * | 1989-04-26 | 1990-11-21 | ||
DE4029156A1 (de) * | 1989-10-09 | 1991-04-11 | Volkswagen Ag | Hydraulisch unterstuetztes lenkungssystem |
DE9101038U1 (de) * | 1991-01-30 | 1991-04-18 | Kern, Hans, Dipl.-Ing. (FH), 8221 Vachendorf | Dosierpumpe |
US5261447A (en) * | 1992-11-25 | 1993-11-16 | Fred Knapp Engraving Co., Inc. | Pneumatic regulating valve |
DE4241030C1 (de) * | 1992-12-05 | 1994-06-01 | Lang Apparatebau Gmbh | Dosierpumpe mit Entlüftungsventil |
DE19712096C1 (de) * | 1997-03-22 | 1998-04-02 | Lang Apparatebau Gmbh | Dosierpumpe zum dosierten Fördern von Flüssigkeiten |
EP0997643B1 (de) | 1998-09-25 | 2006-07-12 | ALLDOS Eichler GmbH | Membrandosierpumpe |
AT408480B (de) * | 1999-12-07 | 2001-12-27 | Hoerbiger Hydraulik | Drosselrückschlagventil und verfahren zu dessen herstellung |
DE10233281A1 (de) * | 2002-07-23 | 2004-02-05 | Ksb Aktiengesellschaft | Einrichtung zur Erhaltung der Saugfähigkeit einer Tauchmotorpumpe |
US7175397B2 (en) | 2002-09-27 | 2007-02-13 | Pulsafeeder, Inc. | Effervescent gas bleeder apparatus |
JP4543721B2 (ja) * | 2004-03-26 | 2010-09-15 | パナソニック電工株式会社 | 圧電ダイヤフラムポンプ |
US20080178948A1 (en) * | 2007-01-26 | 2008-07-31 | Max Wilmshurst | Safety Leaky Check Valve for Slow Bleed of Compressed Air |
US7444990B1 (en) * | 2007-12-12 | 2008-11-04 | Robert Bosch Gmbh | Fuel line check valve |
EP2154371B1 (de) | 2008-08-14 | 2018-09-19 | Bran + Lübbe GmbH | Pumpenvorrichtung |
DE102008061904A1 (de) * | 2008-12-15 | 2010-06-17 | Alldos Eichler Gmbh | Verfahren und Vorrichtung zur Entgasung des Förderraums einer Dosierpumpe |
JP2011147043A (ja) * | 2010-01-18 | 2011-07-28 | Panasonic Corp | 口腔内カメラと、その照明の制御方法 |
JP4977791B1 (ja) | 2011-07-01 | 2012-07-18 | 株式会社タクミナ | ポンプ及びポンプの運転方法 |
-
2012
- 2012-03-13 DE DE201210102088 patent/DE102012102088A1/de not_active Withdrawn
-
2013
- 2013-03-12 SI SI201330609A patent/SI2825774T1/sl unknown
- 2013-03-12 HU HUE13709872A patent/HUE032314T2/en unknown
- 2013-03-12 WO PCT/EP2013/054976 patent/WO2013135681A1/de active Application Filing
- 2013-03-12 CA CA2866784A patent/CA2866784C/en not_active Expired - Fee Related
- 2013-03-12 EP EP13709872.9A patent/EP2825774B1/de active Active
- 2013-03-12 PT PT137098729T patent/PT2825774T/pt unknown
- 2013-03-12 ES ES13709872.9T patent/ES2621665T3/es active Active
- 2013-03-12 US US14/383,622 patent/US10677243B2/en active Active
- 2013-03-12 JP JP2014561414A patent/JP6266541B2/ja active Active
- 2013-03-12 PL PL13709872T patent/PL2825774T3/pl unknown
- 2013-03-12 DK DK13709872.9T patent/DK2825774T3/en active
Also Published As
Publication number | Publication date |
---|---|
WO2013135681A1 (de) | 2013-09-19 |
JP2015515568A (ja) | 2015-05-28 |
CA2866784A1 (en) | 2013-09-19 |
CA2866784C (en) | 2018-04-17 |
PL2825774T3 (pl) | 2017-07-31 |
DE102012102088A1 (de) | 2013-09-19 |
ES2621665T3 (es) | 2017-07-04 |
US10677243B2 (en) | 2020-06-09 |
JP6266541B2 (ja) | 2018-01-24 |
SI2825774T1 (sl) | 2017-05-31 |
EP2825774B1 (de) | 2017-02-01 |
PT2825774T (pt) | 2017-04-24 |
US20150110654A1 (en) | 2015-04-23 |
DK2825774T3 (en) | 2017-04-24 |
HUE032314T2 (en) | 2017-09-28 |
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