EP1303700A1 - Thick matter pump - Google Patents
Thick matter pumpInfo
- Publication number
- EP1303700A1 EP1303700A1 EP01951644A EP01951644A EP1303700A1 EP 1303700 A1 EP1303700 A1 EP 1303700A1 EP 01951644 A EP01951644 A EP 01951644A EP 01951644 A EP01951644 A EP 01951644A EP 1303700 A1 EP1303700 A1 EP 1303700A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- pump
- cylinders
- piston
- rod
- 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
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 thick matter pump with two delivery cylinders opening into front end openings in a material feed container, with two hydraulic drive cylinders which are connected to an alternately reversible hydraulic pump on the rod-side or bottom-side pump connections and communicate with one another at their ends opposite the pump connections via a rocking oil line, the drive pistons the drive cylinder and the delivery pistons of the delivery cylinders are rigidly connected to one another in pairs via common piston rods, with compensation lines containing a check valve and connected in the area of the two ends of the drive cylinders, bridging the relevant drive pistons in their end positions, and with two at a defined distance from one of the End of the drive cylinder arranged, connected to a control device, an end position signal f when the associated piston passes r reversal of the hydraulic pump releasing position sensors.
- Two-cylinder thick matter pumps of this type are known in which the two position sensors are arranged on one of the two drive cylinders (EP-B 0 446 206). No end position monitoring is carried out on the other drive cylinder. It has been shown that the flow conditions within the cylinders, due to leakage currents past the piston, can lead to a rocking oil feed or a rocking oil loss, depending on the pressure conditions present, and consequently to a lead or lag of one of the pistons.
- the object of the invention is to provide a sensor arrangement in a thick matter pump of the type specified at the outset, which prevents both the end position popping in low-pressure operation and the formation of plugs in high-pressure operation.
- the solution according to the invention is based on the idea that a suitable arrangement of the position sensors on the drive cylinders prevents the formation of plugs in the delivery cylinders and end-position bumps, while an automatic stroke compensation can be achieved with additional correction means.
- the two position sensors are arranged at a defined distance from the rod-side ends of the two drive cylinders, and in addition a correction sensor is arranged at a defined distance from the bottom end of one of the drive cylinders, which instead of the rod-side position sensor of the other drive cylinder can be temporarily activated to trigger a reversal process.
- the purpose of the correction sensor is to carry out an automatic stroke correction if the drive piston in the relevant drive cylinder no longer moves over the position of the correction sensor, that is to say if the internal leakage oil conditions result in a stroke shortening.
- the correction sensor is activated at defined time intervals for a reversal process.
- a preferred embodiment of the invention provides a reversal as required. This can be done by activating the correction sensor in the absence of a piston signal from the correction sensor and when the piston signal from the position sensor arranged on the opposite drive cylinder is present. It has proven to be advantageous for the control arrangement to contain a delay circuit or a delay software with a time constant corresponding to at least twice the stroke time of the drive piston for activating the correction sensor, which can be triggered when there is no piston signal from the correction sensor and there is a piston signal from the position sensor arranged on the opposite drive cylinder occurring piston signal of the correction sensor is reset. In many applications, however, it is also sufficient if the correction sensor can be activated at defined intervals for a reversal process.
- the position sensors and the correction sensor can be designed as proximity switches or magnetic switches which respond when the piston passes in the direction of the end position and which can be arranged directly in the reversing circuit. In principle, however, it is also possible to design the position sensors and the correction sensor as signal transmitters, which emit an end position signal when the piston passes in the direction of the end position.
- the hydraulic pump is advantageously designed as a reversing pump, in particular as a swash plate axial piston pump.
- a unidirectional hydraulic pump also serves the same purpose.
- the pump connections of the drive cylinders are connected to the hydraulic pump via a directional valve.
- two or more hydraulic pumps can also be provided, which can be connected in parallel to the drive cylinders.
- Figure 1 is a two-cylinder slurry pump in a partially sectioned diagram.
- FIGS. 2a and b show a schematic of the drive hydraulics for the thick matter pump with a reversible pump connected to the rod with symbolic Arrow display of leakage currents in low-pressure and high-pressure operation;
- FIG. 3a and b show a diagram of the drive hydraulics with a reversing pump connected at the bottom in representations corresponding to FIG.
- FIG. 4 shows a diagram of the drive hydraulics for the thick matter pump with a unidirectional hydraulic pump in the closed hydraulic circuit connected to the bottom and reversible via a directional control valve;
- FIG. 5 shows a drive hydraulic system corresponding to FIG. 4 with an open hydraulic circuit.
- the delivery cylinders 10 are driven in a push-pull manner via hydraulic drive cylinders 24 ⁇ 24 ".
- the delivery pistons 26 are connected to the drive piston 30 ', 30" of the drive cylinders 24', 24 "via a common piston rod 28.
- a water tank 32 through which the piston rods 28 extend.
- the drive cylinders 24 ', 24 are on the rod-side connections 34', 34" (Fig. 2a, b) or on the bottom-side connections 36 ', 36 “(Fig. 3a, b) via pressure lines 38', 38" with the hydraulic connections 40 ', 40 "of a hydraulic pump 42 driven by a motor 43 and communicate at their opposite connections 36', 36" and 34 ', 34 " with each other via a rocking oil line 44.
- an equalizing line 48 containing a check valve 46 and bridging the respective drive piston 30 ', 30 "in its end positions is arranged at the two ends of the drive cylinders 24', 24".
- a hydraulic pump 42 designed as a reversing pump is provided in each case.
- the direction of movement of the drive piston 30 ', 30 "and thus the delivery piston 26 is reversed in that the swash plate 50 of the reversing pump 42 is triggered by a reversing signal swung through the zero position and thus the delivery direction of the pressure oil in the lines 38', 38" is reversed.
- the delivery rate of the reversing pump 42 is determined by the swivel angle of the swash plate 50 at a predetermined drive speed.
- the swash plate 50 of the reversing pump 42 is connected to a control arrangement 51, in which the end position signals output by the position sensors 52 ', 52 "are evaluated.
- the position sensors 52', 52" arranged on the rod ensure that the Delivery pistons 26 come into the immediate vicinity of the opening 12 with each delivery stroke, so that no concrete plug can form.
- a correction sensor 54 near the bottom end of the one drive cylinder 24 'is a correction sensor 54 which, instead of the rod-side position sensor 52 "of the other drive cylinder 24", can be activated temporarily via the control arrangement 51 to trigger a reversal process.
- FIGS. 2b and 3b show typical pressure values during high pressure operation.
- the pressure ratios in the drive cylinders 24 ', 24 "are calculated from the pressure in the pressure lines 38', 38", taking into account the piston surfaces on the bottom side and the rod side.
- the exemplary embodiments according to FIGS. 4 and 5 differ from the exemplary embodiment according to FIGS. 3a and b in that in each case a unidirectionally delivering hydraulic pump 42 is provided.
- the hydraulic connections between the two drive cylinders are reversed there by a directional valve 58 arranged in the pressure lines 38 ′, 38 ′′, which can be controlled via the position sensors 52 ′, 52 ′′ and the correction sensor 54 and the control arrangement 51 in the sense of FIGS. 3a and b is.
- a closed hydraulic circuit is provided; the oil return leads back to the hydraulic pump.
- an open hydraulic circuit is provided, in which the oil from a hydraulic liktank 60 is sucked in and the oil return is returned to the hydraulic tank 16.
- the hydraulic connections 40 ', 40 "of the hydraulic pump equivalent to FIGS. 3a and b are found in the exemplary embodiments according to FIGS. 4 and 5 on the outlet side of the directional control valves 58 facing the drive cylinders 24', 24".
- the invention relates to a thick matter pump, in particular for conveying concrete.
- the thick matter pump has two delivery cylinders 10 opening into front end openings 12 in a material feed container 14 and two hydraulic drive cylinders 24 ', 24 ", the pistons 26, 30', 30" of which are rigidly connected to one another in pairs by a common piston rod 28.
- they communicate with one another at their ends opposite the pump connections via a rocking oil line 44.
- the drive cylinders and thus the feed cylinders are driven in push-pull mode by the reversing pump 42.
- two position sensors 52 ', 52 " which are arranged at a defined distance from one of the ends of the drive cylinders and respond to a driving piston 30', 30" are provided
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10036202A DE10036202A1 (en) | 2000-07-24 | 2000-07-24 | Slurry pump |
DE10036202 | 2000-07-24 | ||
PCT/EP2001/007415 WO2002008605A1 (en) | 2000-07-24 | 2001-06-28 | Thick matter pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1303700A1 true EP1303700A1 (en) | 2003-04-23 |
EP1303700B1 EP1303700B1 (en) | 2005-08-31 |
Family
ID=7650150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01951644A Expired - Lifetime EP1303700B1 (en) | 2000-07-24 | 2001-06-28 | Thick matter pump |
Country Status (7)
Country | Link |
---|---|
US (1) | US6929454B2 (en) |
EP (1) | EP1303700B1 (en) |
JP (1) | JP4320172B2 (en) |
KR (1) | KR100803842B1 (en) |
DE (2) | DE10036202A1 (en) |
ES (1) | ES2247148T3 (en) |
WO (1) | WO2002008605A1 (en) |
Families Citing this family (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10145448A1 (en) * | 2001-09-14 | 2003-05-22 | Bayerische Motoren Werke Ag | Device for conveying powder and method for operating it |
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 (en) * | 2004-03-25 | 2005-10-13 | Putzmeister Ag | Material feed container for a slurry pump |
DE102004015416A1 (en) * | 2004-03-26 | 2005-10-13 | Putzmeister Ag | Apparatus and method for controlling a slurry pump |
DE102004015419A1 (en) * | 2004-03-26 | 2005-10-13 | Putzmeister Ag | Apparatus and method for controlling a slurry pump |
DE102004015415A1 (en) * | 2004-03-26 | 2005-10-13 | Putzmeister Ag | Device and method for controlling a two-cylinder slurry pump |
KR100529000B1 (en) * | 2004-05-08 | 2005-11-21 | 원덕수 | Functional Mask |
AU2005252262B2 (en) * | 2004-06-07 | 2011-07-28 | Hitech Hippo Australia Ltd | A pump assembly |
WO2005121555A1 (en) * | 2004-06-07 | 2005-12-22 | Hunter Hitech Pty Ltd | A pump assembly |
US9677549B2 (en) * | 2005-07-28 | 2017-06-13 | Graco Minnesota Inc. | Reciprocating pump with electronically monitored air valve and piston |
CN101233321B (en) * | 2005-07-28 | 2010-06-16 | 格雷索明尼苏达有限公司 | Reciprocating pump with electronically monitored air valve and piston |
DE102005039238B4 (en) * | 2005-08-19 | 2016-05-25 | Schwing Gmbh | Concrete conveyor with a water tank |
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 (en) * | 2006-04-04 | 2007-10-11 | Putzmeister Ag | Piston pump for thick materials |
US7775790B2 (en) * | 2007-01-23 | 2010-08-17 | Formax, Inc. | Food molding mechanism for a food patty molding machine |
DE102007005313A1 (en) * | 2007-02-02 | 2008-08-07 | Itw Gema Ag | Coating powder conveying device |
ES2332842B1 (en) * | 2007-08-21 | 2011-01-07 | Hidraulica, Construccion Y Conservacion, S.A | HIGH PRESSURE POLYMER INJECTION PUMP. |
US20090252626A1 (en) * | 2008-04-08 | 2009-10-08 | Andre Salvaire | Rotary Distributor for Pressure Multiplier |
WO2010055861A1 (en) | 2008-11-14 | 2010-05-20 | ジェイパワー・エンテック株式会社 | Lock hopper |
US20100243252A1 (en) | 2009-03-31 | 2010-09-30 | Rajesh Luharuka | Apparatus and Method for Oilfield Material Delivery |
DE102011004035A1 (en) * | 2011-02-14 | 2012-08-16 | Illinois Tool Works Inc. | Powder pump for conveying coating powder |
DE102011052432A1 (en) * | 2011-04-15 | 2012-10-18 | Reinhausen Plasma Gmbh | Diaphragm pump and method for conveying fine-grained powders by means of a diaphragm pump |
CN103104434B (en) * | 2011-11-14 | 2015-06-03 | 徐州徐工施维英机械有限公司 | Concrete piston automatic returning device in closed type pumping system |
DE102012209142A1 (en) * | 2012-05-31 | 2013-12-05 | Putzmeister Engineering Gmbh | hydraulic system |
DE102012216242A1 (en) * | 2012-09-13 | 2014-03-13 | Putzmeister Engineering Gmbh | Device for drive control of a two-cylinder slurry pump |
CN104696296A (en) * | 2013-12-04 | 2015-06-10 | 佛山市恒力泰机械有限公司 | Hydraulic synchronization oil channel structure with bi-directional oil replenishing and discharging function |
CN103671316B (en) * | 2013-12-18 | 2016-03-23 | 中联重科股份有限公司 | Hydraulic system of pump and pumping equipment |
US9926925B2 (en) * | 2014-09-04 | 2018-03-27 | Schwing Bioset, Inc. | Sludge flow measuring system |
CN105840587B (en) * | 2015-01-12 | 2018-01-02 | 中联重科股份有限公司 | A kind of pumping installations mends draining control device, system, method and engineering machinery |
CN106246493A (en) * | 2016-09-19 | 2016-12-21 | 李星宇 | A kind of no pulse hydraulic pressure 4 cylinder direct driving type slush pump system |
DE102018208263A1 (en) | 2018-05-25 | 2019-11-28 | Putzmeister Engineering Gmbh | Device for conveying thick matter |
DE102018209513B3 (en) * | 2018-06-14 | 2019-10-17 | Putzmeister Engineering Gmbh | Hydraulic drive system for a building material pump and building material pump |
CN108799040A (en) * | 2018-09-03 | 2018-11-13 | 三汽车制造有限公司 | A kind of pumping machine |
DE102018130480A1 (en) * | 2018-11-30 | 2020-06-04 | Liebherr-Betonpumpen Gmbh | Two-cylinder slurry pump |
CN109854472A (en) * | 2019-04-12 | 2019-06-07 | 湖南凯利特泵业有限公司 | Double cylinder double acting hydraulic reciprocating pump |
CN114687980B (en) * | 2020-12-29 | 2023-10-10 | 三一汽车制造有限公司 | Pumping equipment, pumping system and reversing parameter adjusting method thereof |
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GB1452561A (en) * | 1973-11-16 | 1976-10-13 | Fogt Indmasch | Apparatus for pumping wet concrete |
EP0080385A1 (en) | 1981-11-25 | 1983-06-01 | Hands-England Drilling Limited | Pump systems |
DE3834678A1 (en) | 1988-10-12 | 1990-04-19 | Putzmeister Maschf | METHOD AND DEVICE FOR CORRECTING THE PISTON STROKE IN THE CYLINDERS OF A TWO-CYLINDER FUEL PUMP |
DE3840892A1 (en) * | 1988-12-05 | 1990-06-07 | Putzmeister Maschf | METHOD AND DEVICE FOR CONTROLLING A TWO-CYLINDER FUEL PUMP |
DE9218858U1 (en) * | 1991-05-16 | 1995-12-07 | Sandoz-Patent-GmbH, 79539 Lörrach | Double piston pump |
US5332366A (en) * | 1993-01-22 | 1994-07-26 | Schwing America, Inc. | Concrete pump monitoring system |
DE19542258A1 (en) * | 1995-11-13 | 1997-05-15 | Putzmeister Maschf | Method and device for controlling a two-cylinder thick matter pump |
DE19716030C1 (en) * | 1997-04-17 | 1998-03-26 | Sievers Hans Wilhelm | Method of viscous fluid piston pump operation |
US6100608A (en) * | 1997-06-13 | 2000-08-08 | Japan Pneumatics Co., Ltd. | Proximity switch |
KR100281932B1 (en) * | 1998-10-10 | 2001-09-22 | 양재신 | Drive cylinder hydraulics |
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/en not_active Withdrawn
-
2001
- 2001-06-28 KR KR1020037000141A patent/KR100803842B1/en active IP Right Grant
- 2001-06-28 EP EP01951644A patent/EP1303700B1/en not_active Expired - Lifetime
- 2001-06-28 WO PCT/EP2001/007415 patent/WO2002008605A1/en active IP Right Grant
- 2001-06-28 ES ES01951644T patent/ES2247148T3/en not_active Expired - Lifetime
- 2001-06-28 JP JP2002514262A patent/JP4320172B2/en not_active Expired - Fee Related
- 2001-06-28 US US10/333,807 patent/US6929454B2/en not_active Expired - Lifetime
- 2001-06-28 DE DE50107303T patent/DE50107303D1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0208605A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2002008605A1 (en) | 2002-01-31 |
EP1303700B1 (en) | 2005-08-31 |
KR20030015369A (en) | 2003-02-20 |
ES2247148T3 (en) | 2006-03-01 |
US20030170127A1 (en) | 2003-09-11 |
JP2004505191A (en) | 2004-02-19 |
JP4320172B2 (en) | 2009-08-26 |
DE10036202A1 (en) | 2002-02-07 |
DE50107303D1 (en) | 2005-10-06 |
US6929454B2 (en) | 2005-08-16 |
KR100803842B1 (en) | 2008-02-14 |
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