EP1303700B1 - Dickstoffpumpe - Google Patents
Dickstoffpumpe Download PDFInfo
- Publication number
- EP1303700B1 EP1303700B1 EP01951644A EP01951644A EP1303700B1 EP 1303700 B1 EP1303700 B1 EP 1303700B1 EP 01951644 A EP01951644 A EP 01951644A EP 01951644 A EP01951644 A EP 01951644A EP 1303700 B1 EP1303700 B1 EP 1303700B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- piston
- thick material
- pump
- pump according
- 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.)
- Expired - Lifetime
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
- 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
- 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
- F04B15/023—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 supply of fluid to the pump by gravity through a hopper, e.g. without intake valve
-
- 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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
- F04B9/117—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
- F04B9/1176—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor
- F04B9/1178—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor the movement in the other direction being obtained by a hydraulic connection between the liquid motor cylinders
Definitions
- the invention relates to a slurry pump with two frontal openings into a material feed bin, opening feed cylinders, with two hydraulic drive cylinders, the rod-side or bottom side Pump connections with an alternately reversible hydraulic pump are connected and at their pump ports opposite End communicate with each other via a swing oil pipe, wherein the Drive piston of the drive cylinder and the delivery piston of the delivery cylinder in pairs rigidly connected to each other via common piston rods are connected with in the region of the two ends of the drive cylinder, bridging the respective drive pistons in their end positions, a check valve containing compensating lines, and with two in arranged at a defined distance from one of the ends of the drive cylinder, connected to a control device, when passing the associated piston a limit signal for the reversal of the hydraulic pump dispensing position sensors.
- the object of the invention is a sensor arrangement to provide in a slurry pump of the type specified, the both the final blows in low pressure operation as well the plug formation prevented in high pressure operation.
- the solution according to the invention is based on the idea that by a suitable arrangement of the position sensors on the drive cylinders a plug formation in the delivery cylinders and end position bangs avoided while with additional correction means an automatic Hub compensation can be achieved.
- the invention proposes that the two position sensors in a defined Distance from the rod-side ends of the two drive cylinders are arranged, and that in addition a correction sensor in a defined distance from the bottom end of one of the drive cylinders is arranged instead of the rod-side position sensor of the other drive cylinder is temporarily activated to trigger a Um Kunststoffvorgangs.
- the Correction sensor has the task of an automatic stroke correction perform when the drive piston in the relevant drive cylinder the position of the correction sensor is not overridden, so it is comes due to the internal leakage oil ratios to a Hubverkürzung.
- the correction sensor at defined intervals in each case activated for a changeover process.
- the invention provides a demand-based reversal. This can thereby take place that the correction sensor in the absence of the piston signal of the Correction sensor and existing piston signal of the opposite Drive cylinder arranged position sensor is activated.
- the control arrangement has a delay circuit or a delay software with at least one the double stroke time of the drive piston corresponding time constants for activating the correction sensor, in the absence of a piston signal of the correction sensor and existing piston signal of the opposite one Drive cylinder arranged position sensor can be triggered and can be reset when occurring piston signal of the correction sensor.
- the position sensors and the correction sensor may be as if passing by the piston towards the end position responsive proximity switch or Magnet switch may be formed, which is arranged directly in the reversing circuit can be. In principle, however, it is also possible to use the position sensors and form the correction sensor as a signal generator, the Passing the piston in the direction of the end position, emit an end position signal.
- the hydraulic pump is advantageously as a reversing pump, in particular designed as a swash plate axial piston pump.
- the same purpose also fulfills a unidirectional hydraulic pump. In this case are the pump connections of the drive cylinder via a directional control valve with the Hydraulic pump connected.
- two or more hydraulic pumps can be provided be connected in parallel to the drive cylinder.
- the slurry pump shown in Fig. 1 consists essentially of two delivery cylinders 10, the frontal openings 12 in a material feed container 14 open and alternately during the pressure stroke (arrow 16) connectable via a diverter 18 with a delivery line 20 and during the suction stroke (arrow 22) while sucking material to the material feed container 14 are open.
- the delivery cylinder 10 are hydraulic Drive cylinder 24 ', 24 "driven in push-pull
- the delivery piston 26 via a common piston rod 28 with the drive piston 30 ', 30 "of the drive cylinder 24', 24" connected.
- a water box 32 In the area between the delivery cylinders 10 and the drive cylinders 24 ', 24 "is located a water box 32 through which the piston rods 28 pass.
- the drive cylinders 24 ', 24 are at rod-side terminals 34', 34" (Fig. 2a, b) or at bottom-side terminals 36 ', 36 “(Fig. 3a, b) via Pressure lines 38 ', 38 "with the hydraulic connections 40', 40” one on a Motor 43 driven hydraulic pump 42 connected and communicate at their opposite terminals 36 ', 36 “and 34', 34", respectively via a swing oil pipe 44 with each other.
- stroke correction is at the two ends of the drive cylinder 24 ', 24 "one each concerned Drive piston 30 ', 30 "in its end positions bridging, a check valve 46 containing balancing line 48 arranged.
- Reversing pump trained hydraulic pump 42 is provided.
- the direction of movement the drive piston 30 ', 30 "and thus the delivery piston 26th is thereby reversed that the swash plate 50 of the reversing 42th triggered by a Um Kunststoffsignal swung through the Nullage and thus the conveying direction of the pressure oil in the lines 38 ', 38 "vice versa becomes.
- the flow rate of the reversing 42 is given at Drive speed determined by the tilt angle of the swash plate 50.
- 2a, b and 3a, b are each for the low-pressure operation (idling or cleaning operation) and the high-pressure operation (thick matter delivery) typical Indicated pressure values in the rod-side and bottom-side cylinder chamber, which lead to a leakage oil flow around the drive pistons 30 ', 30 "
- the pressure difference occurring leakage currents are determined by the length of the arcuate arrows 56 ', 56 "symbolically quantified in Figures 2a and 3a the typical pressure conditions are given in low-pressure operation, while in Figs. 2b and 3b typical pressure values at high pressure operation are indicated.
- the pressure conditions in the drive cylinders 24 ', 24 “calculate from the pressure in the pressure lines 38 ', 38 "under consideration the piston surfaces on the bottom side and the rod side.
- This process can be done via the correction sensor 54 are monitored. Once the drive piston 30 'in the movement the correction sensor 54 is no longer achieved, is not on the shown control arrangement after a delay time of Correction sensor 54 for the Um Tavernvorgang activated and the position sensor 52 ". This causes the rod end position of the Drive piston 30 "rocker oil over the adjacent equalization line 48 to the low pressure side in the pressure line 38 "urged until the drive piston 30 'arrives in its bottom end position. In this way you reach with a single switching over the correction sensor 54 a automatic stroke compensation.
- FIGS. 4 and 5 differ from the Embodiment of Fig. 3a and b characterized in that in each case a unidirectional promotional hydraulic pump 42 is provided.
- the reversal of the Hydraulic connections between the two drive cylinders take place there by a in the pressure lines 38 ', 38 "arranged directional control valve 58, the via the position sensors 52 ', 52 "and the correction sensor 54 and the Control arrangement 51 in the sense of Fig. 3a and b is controllable.
- in the Case of Figure 4 is provided a closed hydraulic circuit.
- the oil return leads back to the hydraulic pump.
- Fig. 5 is a open hydraulic circuit provided, wherein the oil from a hydraulic tank 60 is sucked and returned the oil return in the, hydraulic tank 60 is.
- the to Fig. 3a and b equivalent hydraulic connections 40 ', 40 "of the hydraulic pump can be found in the embodiments 4 and 5 on the drive cylinders 24 ', 24 "facing outlet side the directional valves 58.
- the invention relates to a slurry pump, in particular for the delivery of concrete.
- the sludge pump has two over-front openings 12 in a material feed container 14 opening delivery cylinder 10 and two hydraulic drive cylinder 24 ', 24 ", the piston 26,30', 30" in pairs over a common Piston rod 28 are rigidly interconnected.
- the reversing pump 42 are two at a defined distance from one of the ends of the drive cylinder arranged, on a passing drive piston 30 ', 30 "responsive Position sensors 52 ', 52 "provided.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Description
- Fig. 1
- eine Zweizylinder-Dickstoffpumpe in teilweise geschnittener schaubildlicher Darstellung;
- Fig. 2a und b
- ein Schema der Antriebshydraulik für die Dickstoffpumpe mit stangenseitig angeschlossener Reversierpumpe mit symbolischer Pfeildarstellung der Leckströme beim Niederdruck- und Hochdruckbetrieb;
- Fig. 3a und b
- ein Schema der Antriebshydraulik mit bodenseitig angeschlossener Reversierpumpe in Darstellungen entsprechend Fig. 2a und b;
- Fig. 4
- ein Schema der Antriebshydraulik für die Dickstoffpumpe mit bodenseitig angeschlossener, über ein Wegeventil umsteuerbarer unidirektionaler Hydraulikpumpe in geschlossenem Hydraulikkreis;
- Fig. 5
- eine Antriebshydraulik entsprechend Fig. 4 mit offenem Hydraulikkreis.
Claims (12)
- Dickstoffpumpe mit zwei über stirnseitige Öffnungen (12) in einen Materialaufgabebehälter (14) mündenden Förderzylindern (10), mit zwei hydraulischen Antriebszylindern (24',24"), die über stangenseitige oder bodenseitige Pumpenanschlüsse (34',34";36',36") mit einer alternierend umsteuerbaren Hydraulikpumpe (42) verbunden sind und an ihren den Pumpenanschlüssen gegenüberliegenden Enden über eine Schaukelölleitung (44) miteinander kommunizieren, wobei die Antriebskolben (30',30") der Antriebszylinder (24',24") und die Förderkolben (26) der Förderzylinder (10) paarweise über gemeinsame Kolbenstangen (28) starr miteinander verbunden sind, mit an den Antriebszylindern (24',24") im Bereich ihrer Enden angeschlossenen, die zugehörigen Antriebskolben (30',30") in deren Endlagen überbrückenden, ein Rückschlagventil (46) enthaltenden Ausgleichsleitungen (48) und mit zwei in definiertem Abstand von einem der Enden der Antriebszylinder angeordneten, an eine Steuerungsanordnung (51) angeschlossenen, auf den vorbeilaufenden Antriebskolben (30',30") ansprechenden und ein Endlagensignal für die Umsteuerung der Hydraulikpumpe (42) abgebenden Positionssensoren (52',52"), dadurch gekennzeichnet, daß die beiden Positionssensoren (52',52") im Abstand von den stangenseitigen Enden der beiden Antriebszylinder (24',24") angeordnet sind, und daß zusätzlich ein Korrektursensor (54) in definiertem Abstand vom bodenseitigen Ende eines der Antriebszylinder (24') angeordnet ist, der anstelle des Positionssensors (52") des anderen Antriebszylinders (24") zeitweilig zur Auslösung eines Umsteuervorgangs aktivierbar ist.
- Dickstoffpumpe nach Anspruch 1, dadurch gekennzeichnet, daß der Korrektursensor (54) vorzugsweise in definierten Zeitabständen jeweils für einen Umsteuervorgang aktivierbar ist.
- Dickstoffpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Steuerungsanordnung (51) eine Verzögerungsschaltung oder einem Prozessor mit einer Verzögerungssoftware, zur Aktivierung des Korrektursensors (54) enthält.
- Dickstoffpumpe nach Anspruch 3, dadurch gekennzeichnet, daß die Verzögerungsschaltung oder die Verzögerungssoftware eine Zeitkonstante aufweist, die mindestens der doppelten Hubzeit der Antriebskolben entspricht.
- Dickstoffpumpe nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Verzögerungsschaltung bei fehlendem Endlagensignal des Korrektursensors (54) und vorhandenem Endlagensignal d,es am gegenüberliegenden Antriebszylinder (24") angeordneten Positionssensors (52") auslösbar und bei auftretendem Endlagensignal des Korrektursensors zurücksetzbar ist.
- Dickstoffpumpe nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß die Verzögerungsschaltung als retriggerbares Zeitrelais ausgebildet ist.
- Dickstoffpumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß jeweils zwei redundante stangenseitige Positionssensoren (52',52") vorgesehen sind.
- Dickstoffpumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Positionssensoren (52',52") und der Korrektursensor (54) als beim Vorbeilaufen des jeweiligen Antriebskolbens (30',30") in Richtung Endlage ansprechende Näherungsschalter oder Magnetschalter ausgebildet sind.
- Dickstoffpumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Positionssensoren (52',52") und der Korrektursensor (54) als beim Vorbeilaufen des jeweiligen Antriebskolbens (30',30") in Richtung. Endlage ein Endlagensignal abgebende Signalgebe ausgebildet sind.
- Dickstoffpumpe nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Hydraulikpumpe als Reversierpumpe (42), insbesondere als Schrägscheiben-Axialkolbenpumpe ausgebildet ist.
- Dickstoffpumpe nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Hydraulikpumpe (42) unidirektional fördert und daß die Pumpenanschlüsse (36',36") der Antriebszylinder (24',24") über ein Wegeventil (58) mit der Hydraulikpumpe (42) verbunden sind.
- Dickstoffpumpe nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß mindestens zwei parallelgeschaltete Hydraulikpumpen (42) vorgesehen sind.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10036202A DE10036202A1 (de) | 2000-07-24 | 2000-07-24 | Dickstoffpumpe |
DE10036202 | 2000-07-24 | ||
PCT/EP2001/007415 WO2002008605A1 (de) | 2000-07-24 | 2001-06-28 | Dickstoffpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1303700A1 EP1303700A1 (de) | 2003-04-23 |
EP1303700B1 true EP1303700B1 (de) | 2005-08-31 |
Family
ID=7650150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01951644A Expired - Lifetime EP1303700B1 (de) | 2000-07-24 | 2001-06-28 | Dickstoffpumpe |
Country Status (7)
Country | Link |
---|---|
US (1) | US6929454B2 (de) |
EP (1) | EP1303700B1 (de) |
JP (1) | JP4320172B2 (de) |
KR (1) | KR100803842B1 (de) |
DE (2) | DE10036202A1 (de) |
ES (1) | ES2247148T3 (de) |
WO (1) | WO2002008605A1 (de) |
Cited By (3)
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DE102005039238A1 (de) * | 2005-08-19 | 2007-02-22 | Schwing Gmbh | Betonfördervorrichtung mit einem Wasserkasten |
CN104696296A (zh) * | 2013-12-04 | 2015-06-10 | 佛山市恒力泰机械有限公司 | 一种具有双向补排油功能的液压同步油路结构 |
WO2020048204A1 (zh) * | 2018-09-03 | 2020-03-12 | 三一汽车制造有限公司 | 一种泵送机械 |
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DE10145448A1 (de) * | 2001-09-14 | 2003-05-22 | Bayerische Motoren Werke Ag | Vorrichtung zum Fördern von Pulver und Verfahren zu deren Betrieb |
US6712587B2 (en) * | 2001-12-21 | 2004-03-30 | Waters Investments Limited | Hydraulic amplifier pump for use in ultrahigh pressure liquid chromatography |
US7241080B2 (en) * | 2004-03-22 | 2007-07-10 | Durr Industries, Inc. | Pump for transferring particulate material |
DE102004015181A1 (de) * | 2004-03-25 | 2005-10-13 | Putzmeister Ag | Materialaufgabebehälter für eine Dickstoffpumpe |
DE102004015415A1 (de) * | 2004-03-26 | 2005-10-13 | Putzmeister Ag | Vorrichtung und Verfahren zur Steuerung einer Zweizylinder-Dickstoffpumpe |
DE102004015416A1 (de) * | 2004-03-26 | 2005-10-13 | Putzmeister Ag | Vorrichtung und Verfahren zur Steuerung einer Dickstoffpumpe |
DE102004015419A1 (de) * | 2004-03-26 | 2005-10-13 | Putzmeister Ag | Vorrichtung und Verfahren zur Steuerung einer Dickstoffpumpe |
KR100529000B1 (ko) * | 2004-05-08 | 2005-11-21 | 원덕수 | 기능성 마스크 |
WO2005121555A1 (en) * | 2004-06-07 | 2005-12-22 | Hunter Hitech Pty Ltd | A pump assembly |
AU2005252262B2 (en) * | 2004-06-07 | 2011-07-28 | Hitech Hippo Australia Ltd | A pump assembly |
KR101197406B1 (ko) * | 2005-07-28 | 2012-11-05 | 그라코 미네소타 인크. | 전자식으로 모니터되는 에어 밸브 및 피스톤을 구비한 왕복펌프 |
US9677549B2 (en) * | 2005-07-28 | 2017-06-13 | Graco Minnesota Inc. | Reciprocating pump with electronically monitored air valve and piston |
WO2007111689A2 (en) * | 2005-11-08 | 2007-10-04 | Good Earth Tools, Inc. | Sealing rings for abrasive slurry pumps |
US7402251B2 (en) * | 2005-12-28 | 2008-07-22 | Mann Welding Company | Chromatography column and method of operation |
DE102006016083A1 (de) * | 2006-04-04 | 2007-10-11 | Putzmeister Ag | Kolbenpumpe für Dickstoffe |
US7775790B2 (en) * | 2007-01-23 | 2010-08-17 | Formax, Inc. | Food molding mechanism for a food patty molding machine |
DE102007005313A1 (de) * | 2007-02-02 | 2008-08-07 | Itw Gema Ag | Beschichtungspulver-Fördervorrichtung |
ES2332842B1 (es) * | 2007-08-21 | 2011-01-07 | Hidraulica, Construccion Y Conservacion, S.A | Bomba de inyeccion de polimeros a alta presion. |
US20090252626A1 (en) * | 2008-04-08 | 2009-10-08 | Andre Salvaire | Rotary Distributor for Pressure Multiplier |
CN102209675B (zh) | 2008-11-14 | 2014-07-23 | 电源开发工程技术株式会社 | 闭锁料斗 |
US20100243252A1 (en) * | 2009-03-31 | 2010-09-30 | Rajesh Luharuka | Apparatus and Method for Oilfield Material Delivery |
DE102011004035A1 (de) * | 2011-02-14 | 2012-08-16 | Illinois Tool Works Inc. | Pulverpumpe zum Fördern von Beschichtungspulver |
DE102011052432A1 (de) * | 2011-04-15 | 2012-10-18 | Reinhausen Plasma Gmbh | Membranpumpe und Verfahren zum Fördern von feinkörnigen Pulvern mit Hilfe einer Membranpumpe |
CN103104434B (zh) * | 2011-11-14 | 2015-06-03 | 徐州徐工施维英机械有限公司 | 闭式泵送系统中砼活塞自动退回装置 |
DE102012209142A1 (de) | 2012-05-31 | 2013-12-05 | Putzmeister Engineering Gmbh | Hydrauliksystem |
DE102012216242A1 (de) * | 2012-09-13 | 2014-03-13 | Putzmeister Engineering Gmbh | Vorrichtung zur Antriebssteuerung einer Zweizylinder-Dickstoffpumpe |
CN103671316B (zh) * | 2013-12-18 | 2016-03-23 | 中联重科股份有限公司 | 泵送液压系统及泵送设备 |
US9926925B2 (en) * | 2014-09-04 | 2018-03-27 | Schwing Bioset, Inc. | Sludge flow measuring system |
CN105840587B (zh) * | 2015-01-12 | 2018-01-02 | 中联重科股份有限公司 | 一种泵送装置补泄油控制设备、系统、方法及工程机械 |
CN106246493A (zh) * | 2016-09-19 | 2016-12-21 | 李星宇 | 一种无脉冲液压4缸直驱式泥浆泵系统 |
DE102018208263A1 (de) | 2018-05-25 | 2019-11-28 | Putzmeister Engineering Gmbh | Vorrichtung zur Förderung von Dickstoff |
DE102018209513B3 (de) * | 2018-06-14 | 2019-10-17 | Putzmeister Engineering Gmbh | Hydraulikantriebssystem für eine Baustoffpumpe und Baustoffpumpe |
DE102018130480A1 (de) * | 2018-11-30 | 2020-06-04 | Liebherr-Betonpumpen Gmbh | Zweizylinder-Dickstoffpumpe |
CN109854472A (zh) * | 2019-04-12 | 2019-06-07 | 湖南凯利特泵业有限公司 | 双缸双作用液压往复泵 |
CN114687980B (zh) * | 2020-12-29 | 2023-10-10 | 三一汽车制造有限公司 | 泵送设备、泵送系统及其换向参数调节方法 |
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DE3840892A1 (de) * | 1988-12-05 | 1990-06-07 | Putzmeister Maschf | Verfahren und vorrichtung zur steuerung einer zweizylinder-dickstoffpumpe |
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DE19716030C1 (de) * | 1997-04-17 | 1998-03-26 | Sievers Hans Wilhelm | Verfahren zum Betreiben einer Dickstoffkolbenpumpe und Vorrichtung zur Durchführung des Verfahrens |
US6100608A (en) * | 1997-06-13 | 2000-08-08 | Japan Pneumatics Co., Ltd. | Proximity switch |
KR100281932B1 (ko) * | 1998-10-10 | 2001-09-22 | 양재신 | 드라이브 실린더 유압장치 |
US6454542B1 (en) * | 2000-11-28 | 2002-09-24 | Laibe Corporation | Hydraulic cylinder powered double acting duplex piston pump |
US6712587B2 (en) * | 2001-12-21 | 2004-03-30 | Waters Investments Limited | Hydraulic amplifier pump for use in ultrahigh pressure liquid chromatography |
-
2000
- 2000-07-24 DE DE10036202A patent/DE10036202A1/de not_active Withdrawn
-
2001
- 2001-06-28 US US10/333,807 patent/US6929454B2/en not_active Expired - Lifetime
- 2001-06-28 ES ES01951644T patent/ES2247148T3/es not_active Expired - Lifetime
- 2001-06-28 JP JP2002514262A patent/JP4320172B2/ja not_active Expired - Fee Related
- 2001-06-28 WO PCT/EP2001/007415 patent/WO2002008605A1/de active IP Right Grant
- 2001-06-28 KR KR1020037000141A patent/KR100803842B1/ko active IP Right Grant
- 2001-06-28 DE DE50107303T patent/DE50107303D1/de not_active Expired - Lifetime
- 2001-06-28 EP EP01951644A patent/EP1303700B1/de not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005039238A1 (de) * | 2005-08-19 | 2007-02-22 | Schwing Gmbh | Betonfördervorrichtung mit einem Wasserkasten |
DE102005039238B4 (de) * | 2005-08-19 | 2016-05-25 | Schwing Gmbh | Betonfördervorrichtung mit einem Wasserkasten |
CN104696296A (zh) * | 2013-12-04 | 2015-06-10 | 佛山市恒力泰机械有限公司 | 一种具有双向补排油功能的液压同步油路结构 |
WO2020048204A1 (zh) * | 2018-09-03 | 2020-03-12 | 三一汽车制造有限公司 | 一种泵送机械 |
Also Published As
Publication number | Publication date |
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EP1303700A1 (de) | 2003-04-23 |
US6929454B2 (en) | 2005-08-16 |
US20030170127A1 (en) | 2003-09-11 |
JP2004505191A (ja) | 2004-02-19 |
KR100803842B1 (ko) | 2008-02-14 |
DE10036202A1 (de) | 2002-02-07 |
KR20030015369A (ko) | 2003-02-20 |
ES2247148T3 (es) | 2006-03-01 |
WO2002008605A1 (de) | 2002-01-31 |
DE50107303D1 (de) | 2005-10-06 |
JP4320172B2 (ja) | 2009-08-26 |
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