EP1235982A1 - Dickstoffpumpe - Google Patents
DickstoffpumpeInfo
- Publication number
- EP1235982A1 EP1235982A1 EP00987322A EP00987322A EP1235982A1 EP 1235982 A1 EP1235982 A1 EP 1235982A1 EP 00987322 A EP00987322 A EP 00987322A EP 00987322 A EP00987322 A EP 00987322A EP 1235982 A1 EP1235982 A1 EP 1235982A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- suction
- thick matter
- pumping
- suction line
- 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
- 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
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
- F04B7/0019—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers
- F04B7/0026—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers and having an oscillating movement
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S417/00—Pumps
- Y10S417/90—Slurry pumps, e.g. concrete
Definitions
- the invention relates to a thick matter pump with at least two pump units alternating in pumping and suction operation, a delivery line, a suction line, and a changeover valve for switching between the pump units, with the changeover valve being a pump unit in pumping operation with the delivery line and a pumping unit in suction operation with the Suction line connected
- Thick matter pumps are used in many cases to convey concrete, but similar materials can also be required with such pump units.
- pump arrangements are known in which the pump units are formed by cylinder / piston pumps, which are alternately connected via a pipe switch with a delivery line or connected to a suction line
- the pipe switch is arranged within a storage container and in the suction mode the cylinder / piston pump sucks the thick matter directly out of the storage container.
- the storage container is in most cases open at the top so that Thick matter can be refilled
- the second pumping unit is still in pumping mode e of the pipe switch is permanently connected to the suction line section leading away from the storage container, whereas the delivery pipe is constantly connected to the cavity of the pipe switch housing.
- the prestressed thick material now comes into contact with the pressurized thick material in the pipe switch housing Vibration in the delivery column, since the preload is preferably at the pressure level in the delivery line and therefore the sludge column does not sag in the delivery line.
- the first pumping unit takes over the pumping operation the tube switch and opening the slide connected to the storage container The cycle starts again when the pump units are exchanged
- a boost pressure device which acts separately from the pump units, is provided for actively effecting a thick material pre-compression
- the suction line comprises an elastically deformable section and the boost pressure device has squeeze elements by means of which the elastically deformable section of the suction line can be compressed for an increase in pressure.
- a deformable section can advantageously be connected to a storage container. Suitable squeeze elements then ensure that the elastically deformable section is closed and pressure is subsequently built up. Due to the relatively low compressibility of the thick matter, mainly air pockets have to be overcome. The deformable section is therefore deformed until the desired pressure build-up in the suction line is established. This could also be done by several squeezing elements.
- the shape of a squeeze element can also be designed such that this function takes place in one operation.
- the elastically deformable section of the suction line is a piece of hose.
- Pieces of tubing that can withstand correspondingly high pressures are well known in the prior art.
- peristaltic pumps are already being used used for conveying concrete, so that sufficient examples can be found in the prior art with regard to the material selection and reinforcement of the hose piece.
- This piece of hose can preferably be inserted into the suction line by means of suitable coupling elements, which enables quick replacement in the event of repair or wear and also allows a more flexible arrangement. Adequate durability of suitable hose pieces for such crushing purposes is given.
- boost pressure device comprises a membrane.
- a membrane can be pressurized on one side through a wide variety of media, so that a bulge occurs, which achieves the desired pre-compression or re-pressing effect.
- the boost pressure device comprises a cylinder / piston unit.
- This unit could e.g. the same or similar to a pump unit, preferably with smaller dimensions, and e.g. open into the side of the suction line.
- the boost pressure device can start and superimpose its pre-compression process already during the suction operation, in particular in the final phase.
- the suction operation and the pre-compression process could be optimally coordinated so that both end at the same time.
- the boost pressure device can preferably comprise adjusting means for adjusting the thick matter compression.
- the force with which, for example, squeeze elements are pressed onto a piece of hose could advantageously be determined. This allows conclusions to be drawn about the pressure prevailing there without direct pressure measurement in the thick material line.
- the pressure setting can be used to optimize the pump behavior to reduce pump surges. For the different thick matter can be relevant different pre-compression pressures
- the boost pressure device can include an overload safety device to limit the maximum thick matter pre-compression. This could be of great advantage in the case of blockages or switching malfunctions, in particular to protect an elastically deformable section of the suction line
- the boost pressure device can work automatically or can be directly coupled to the drive of the pump units. According to one variant, it is advantageous if the squeeze elements of the boost pressure device can be actuated by means of a hydraulic device.
- the hydraulic circuit for the squeeze elements can be directly coupled to a hydraulic circuit for the pump units. so that there is a direct dependence.
- all other possible control constructions are also conceivable
- delivery cylinders with delivery pistons have proven particularly useful as pump units, which is why they are preferably used according to one embodiment.
- the pumps required for the delivery of concrete can be used to achieve very large pump heights by means of such pump units
- Pipe switches with a swivel pipe body have also been found to be suitable for such use as changeover valves, since they are relatively insensitive to the medium to be pumped.
- One variant provides a corresponding application
- the pipe switch comprises a housing that surrounds the swivel pipe body at least in regions at a distance, that a cavity formed between the housing and the swivel tube body is part of the delivery line and the swivel body which can be switched between the pump units is part of the suction line.
- This arrangement means that there are no sealing problems on the swivel tube body (in particular the S-tube) and an eyeglass plate. There are also little or no reaction forces on the swivel tube body (in particular S-tube) and its storage.
- a further embodiment is that the pipe switch comprises a housing which surrounds the swivel pipe body at least at a distance, which is a cavity formed between the housing and the swivel pipe body and is part of the suction line and the swivel pipe body which can be switched between the pump units is part of the delivery line.
- the conditions prevailing in such a variant are sufficiently known and manageable from conventional designs.
- the swivel tube body is switched over, there is the same pressure condition as in the other exemplary embodiment, since the housing is also under pressure by the boost pressure device.
- the inner wall of the housing is constantly in contact with thick matter and a swivel tube body runs along parts of the inner wall, it is provided according to a variant that at least some of the inner wall of the housing is provided with wear elements at least in some areas. These can then be exchanged.
- the housing has at least one lockable maintenance or cleaning opening.
- One end of the suction line can preferably be connected to a storage container.
- a storage container can be designed to be height-adjustable and pivotable. This is very easily possible, in particular, in embodiments in which the changeover valve is not arranged directly in the storage container itself. The height adjustment also increases the full pressure of the suction line
- the invention also relates to a suction / pumping method of a thick matter pump according to one of claims 1 to 11.
- the method comprises the following steps
- the first pump unit switches to pump mode
- the second pump unit switches to suction mode
- the method has the advantage that pre-compression by a boost pressure device can also take place separately from a pressure-applying pump unit.
- the control of the pump unit is much easier, since the pre-compression largely depends on a separate actuation of a boost pressure device.
- the method therefore provides a more continuous flow of demand Steps reproduced in claim 12 then run after a switching process for the other pumping unit (first pumping unit in suction mode, second pumping unit in pumping mode) until the cycle then begins again.
- the sequence of the individual method steps partly runs simultaneously or overlapping
- the pre-compression or post-pressure process can be carried out after the suction operation has ended, overlapping with the suction operation or during the suction operation with a simultaneous end
- the greatest simplification is achieved when the first pump unit stops during the pre-compression step by the boost pressure device or ends the suction operation.
- the optimal filling of the pump unit is then determined by the boost pressure device.This also corresponds to the maximum possible filling, through which the efficiency of the pump units is considerable let increase
- a further variant of the method then consists in that, in the final phase of the suction operation of the second pump unit, the boost pressure device is switched on with a power which superimposes the suction operation of the second pump unit.
- the final phase is therefore primarily determined by the boost pressure device, which then reprints the thick matter, but at the same time the second pump ends - Unit suction operation to still reach its maximum full position During this entire process, the desired thick matter compression can already occur, although the second pump unit is not yet completely finished with its suction operation
- the second pumping unit ends the suction operation at the same time as the pre-compression or post-pressure operation. This means that as soon as the second pumping unit is finished with the suction operation, a completely pre-tensioned thick matter column is available, which is then switched over to the Pump operation can be printed in the delivery line, so there is no loss of time due to pre-compression
- discontinuities in the flow in particular due to the backing up of the thick matter column in the discharge line, can be reduced by building up a pressure in the suction line due to the pre-compression, which essentially corresponds to the pressure in the delivery line during pump operation.
- the pre-compressed thick material comes into contact with the thick material in the delivery line. Since both have essentially the same pressure, there are no vibrations in the thick material column.
- both pumping units operate with halved volume flow in pumping operation. Overlaps that e.g. by a changeover valve are compensated. As a result, a flow rate that is as constant as possible is also present during the switching process.
- Fig. 1 a to 1 d is a schematic sequence of the pumping process in a two-cylinder thick matter pump
- the thick matter pump shown in FIGS. 1a to 1d primarily serves to convey concrete.
- This comprises a first pump unit 1 and a second pump unit 2.
- the pump units 1 and 2 are cylinder / piston pumps, which either suck or pump the thick matter by means of a piston 3 and 4 which can be moved back and forth.
- Pistons 3 and 4 are Suitable hydraulic controls are controlled so that suitable pump pressures can be applied.
- the cross section of the pump units 1 and 2 is circular, so that circular openings 5 and 6 are present at one end thereof.
- the circular openings open into a tube switch housing 7 at a distance from one another.
- the pipe switch housing 7 has a further circular opening 8, to which a delivery line string (not shown) is connected.
- This conveyor line is thus in direct connection with the interior of the diverter housing 7.
- a further opening 9 is provided in the pipe switch housing 7, which is connected to a suction line section 10.
- the opening 9 does not open into the interior of the tube switch housing 7, but is part of an S-shaped swivel tube body 11.
- the swivel axis or axis of rotation of the swivel tube body 11 is at the same time the center axis of the opening 9.
- the opposite end of the swivel tube body 11 slides on a spectacle plate 12, which is part of the diverter housing 7. This opposite end can be brought into congruence with the opening 5 of the first pump unit 1 or with the opening 6 of the second pump unit 2.
- the suction line section 10 is therefore connected to the pump unit 1, as shown in FIG. 1 a, or in the other switch position to the pump unit 2, as shown in FIG. 1 d.
- the suction line section 10 is connected at its other end to a storage container or filling funnel 13, into which the thick material is filled. In the case of concrete, this is done e.g. using a concrete mixer truck.
- the suction line section 10 consists at least in part of an elastically deformable piece of hose. This is a high-strength, preferably armored elastomer hose, as is already used in hose pumps for the conveyance of thick matter.
- squeeze elements preferably rollers
- a hydraulic drive which can be coupled to the drive of the pump units 1 and 2.
- the squeeze elements 15, 16 can be moved axially to the suction line section 10 in addition to their radial actuation direction. They then roll around axes on its surface, in particular in the direction of the pump units 1 and 2.
- the thick material in particular concrete, is filled into the storage container 13.
- the squeeze elements 15, 16 of the boost pressure device 17 are in their open state.
- the thick material flows at least partially into the suction line section 10 due to its own weight and the storage container 13 which is usually arranged higher.
- the swivel tube body 1 1 is in the position shown in FIG. 1 a and connects the suction line section 10 to the pump unit 1.
- the piston 3 of the pump unit 1 is located near the opening 5. In this position, the suction operation of the pump unit starts 1 and the piston 3 moves back. Due to the negative pressure, thick matter is sucked into the pump unit 1 through the suction line section 10 and the swivel tube body 11.
- the boost pressure device 17 is actuated.
- the squeeze elements 15 and 16 move together and press the flexible suction line section 10 together until it is closed at the squeeze point reprinted the suction line section 10 via the swivel tube body 1 1 and into the pump unit 1 so that a pre-compression takes place.
- the thick matter itself is relatively uncompressible and mainly the much smaller percentage of air has to be compressed, a relatively small deformation of the suction line section 10 can result in a compression respectable pressure increase of the thick material can be achieved If the pure radial deformation of the suction line section 10 by the squeeze elements 15, 16 is not sufficient, these can also be moved axially, so that the pressure can be increased further
- FIG. 1 c Due to the pressing of the thick material into the pump unit 1, an optimal filling takes place with the piston 3 fully retracted. This state is shown in FIG. 1 c.
- the piston 4 of the pump unit 2 requests thick material into the delivery line by moving the piston 4 in the direction of the pipe switch housing 7, the thick material then located is printed into the cavity 14 and out of the opening 8 into the delivery line section arranged thereon.
- the thick material is prestressed in the suction line preferably with the same pressure as the thick material is pressed out by means of the piston 4 d a swiveling of the swivel tube body 11 so that the pump unit 1 is connected via the opening 5 to the cavity 14 of the pipe switch housing 7 and the pump unit 2 is connected to the suction line.
- the boost pressure device 17 opens by retracting the squeeze elements 15 and 16 (see Fig. 1 d).
- the prestressed content of the pump unit 1 is immediately in the tube switch housing 7 with the thick material, which is also under pressure in connection.
- the thick matter in the pump unit 1 is not compressed due to the delivery pressure now present, since this is already preloaded accordingly.
- both pistons 3 and 4 carry out a pumping stroke at half the conveying speed. In the second case, this means that piston 3 begins its movement when piston 4 is just finishing its pumping stroke.
- the piston 3 After complete switching over according to FIG. 1 d, the piston 3 then moves at full speed, while the piston 4 begins its suction stroke and sucks thick matter out of the storage container 13 via the suction line section. The pumping process then continues with swapped pump units.
- the capacity of the pump units 1 and 2 can be fully utilized by achieving an optimal filling of the pump units during suction operation and the additional preload by the boost pressure device 17. Compared to similar pump units, in which the compression is carried out by the pistons 3 or 4, there is an efficiency improvement of up to 20%.
- the pump unit 1 is in the suction mode and the pump unit 2 is in the pump mode.
- the boost pressure device 17 is open, so that suction can take place from the reservoir 13 into the pump unit 1.
- the Charge pressure device 17 is actuated so that the pump unit is completely filled
- the end of the swivel tube body lying against the spectacle plate 12 is not connected to any opening 5 or 6 of the pump units 1 or 2.
- the boost pressure device 17 opens by moving the squeeze elements 15 and 16 radially apart.
- the piston 4 ends its pumping stroke and essentially closes off with the goggle plate 12 and accordingly closes the opening 6.
- the piston 3 moves on at a normal forwarding speed, so that the volume flow that is pressed out of the opening 8 is maintained
- the charge pressure device 17 Towards the end of the suction operation according to FIGS. 2g and 2h, the charge pressure device 17 then starts again and ensures that the pump unit 2 is completely filled with a corresponding pretension.
- the pretension pressure here should also essentially correspond to the delivery pressure in the delivery line, in particular in the pipe line. chengehause 7, correspond
- adjusting means for adjusting the boost pressure device can also be provided in order to be able to adjust different thick matter densifications.
- the type of embodiment of a thick matter pump according to the invention is also outstandingly suitable for retrofitting in existing pumping systems.
- Even thick matter pumps that do not have pumping units that can be controlled according to the variant of FIGS. 2a to 2 ⁇ can be retrofitted with a boost pressure device, so that here too sets continuous flow of flow
- compression shocks that are suddenly eliminated by suddenly compressing the thick matter volume in a pumping unit when switching over by the pretension are eliminated
- the boost pressure device comprises a membrane or is formed by a cylindrical piston unit.
- the pumping power of the boost pressure device can also be greater than the suction power of one of the pump units.
- An advantageous housing is achieved in that at least part of the inner wall of the Housing can be provided with wear elements at least in some areas.
- the housing can have at least one lockable maintenance or cleaning opening.
- the method can also be supplemented by an additional step in which, in the final phase of the suction operation, one of the pump units switches on the boost pressure with a power which superimposes the suction operation of this pump unit.
- the second pump unit can operate the suction operation simultaneously with the pre-compression or post-pressure process break up
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19957337A DE19957337A1 (de) | 1999-11-29 | 1999-11-29 | Dickstoffpumpe |
DE19957337 | 1999-11-29 | ||
PCT/EP2000/011966 WO2001040649A1 (de) | 1999-11-29 | 2000-11-29 | Dickstoffpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1235982A1 true EP1235982A1 (de) | 2002-09-04 |
EP1235982B1 EP1235982B1 (de) | 2006-04-12 |
Family
ID=7930682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00987322A Expired - Lifetime EP1235982B1 (de) | 1999-11-29 | 2000-11-29 | Dickstoffpumpe |
Country Status (7)
Country | Link |
---|---|
US (1) | US6793467B2 (de) |
EP (1) | EP1235982B1 (de) |
CN (1) | CN1298996C (de) |
AU (1) | AU2361001A (de) |
DE (2) | DE19957337A1 (de) |
ES (1) | ES2262556T3 (de) |
WO (1) | WO2001040649A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009008517A1 (de) | 2009-02-11 | 2010-08-12 | Hudelmaier, Götz | Hydraulischer Antrieb einer Dickstoffpumpe |
DE102012107933A1 (de) | 2012-08-28 | 2014-03-06 | Götz Hudelmaier | Dickstoffpumpe zur Erzeugung eines kontinuierlichen Dickstoffstroms sowie Verfahren zum Betrieb einer Dickstoffpumpe zur Erzeugung eines kontinuierlichen Dickstoffstroms |
WO2016181405A1 (en) * | 2015-05-08 | 2016-11-17 | Amit Arun Gokhale | A reciprocating piston concrete pump having a force multiplier cum automatic overload protection & disengaging device separate from its drive mechanism |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19959217A1 (de) * | 1999-12-08 | 2001-06-13 | Putzmeister Ag | Verfahren und Anordnung zum Betonieren von vertikalen Schächten |
DE10240256A1 (de) * | 2002-08-31 | 2004-03-11 | Hudelmaier, Gerhard, Dr. | Dickstoffpumpe |
DE102004009362B4 (de) * | 2004-02-26 | 2008-01-24 | Schwing Gmbh | Kolben-Dickstoffpumpe |
JP4168198B2 (ja) * | 2005-05-26 | 2008-10-22 | 兵神装備株式会社 | 容器内貯留液の汲み出し方法とその装置 |
US7513758B2 (en) * | 2005-11-08 | 2009-04-07 | Good Earth Tools, Inc. | Sealing rings for abrasive slurry pumps |
DE102009056689B4 (de) * | 2009-12-02 | 2015-10-15 | Prometal Rct Gmbh | Beschichter für eine Rapid-Prototyping-Anlage |
CN101832259B (zh) * | 2010-04-16 | 2012-07-04 | 三一重工股份有限公司 | 混凝土泵用分配阀及混凝土泵 |
CN102536788A (zh) * | 2012-01-31 | 2012-07-04 | 三一重工股份有限公司 | 一种分配阀、物料输送系统及工程机械 |
CN107355358A (zh) * | 2017-08-04 | 2017-11-17 | 中铁工程装备集团隧道设备制造有限公司 | 无间隙连续泵送的活塞式泵送装置及其控制方法 |
DE102018208125A1 (de) * | 2018-05-23 | 2019-11-28 | Putzmeister Engineering Gmbh | System zur Vermeidung einer Dickstoffverstopfung in einer Dickstoffförderleitung beim Anpumpen von Dickstoff in der Dickstoffförderleitung |
DE102018208121A1 (de) * | 2018-05-23 | 2019-11-28 | Putzmeister Engineering Gmbh | System zur Erfassung und zur Lösung einer teilweisen oder vollständigen Dickstoffverstopfung in einer Dickstoffförderleitung |
CN110043438A (zh) * | 2019-05-24 | 2019-07-23 | 徐州徐工施维英机械有限公司 | 糊状物料输送装置和工程车辆 |
CN110757641B (zh) * | 2019-10-25 | 2021-09-10 | 苏师大半导体材料与设备研究院(邳州)有限公司 | 一种陶瓷浆料的泵送方法 |
DE102021100981B3 (de) * | 2021-01-19 | 2022-04-28 | Putzmeister Engineering Gmbh | Dickstoffventil und Verfahren zum Betätigen eines Dickstoffventils |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR737900A (fr) | 1932-05-31 | 1932-12-17 | Refouleur-transporteur de bétons, mortiers ou matériaux analogues | |
FR42578E (fr) | 1932-08-16 | 1933-08-23 | Refouleur transporteur de bétons, mortiers ou matériaux analogues | |
US3327641A (en) * | 1965-03-08 | 1967-06-27 | Air Placement Equipment Co Inc | Concrete pump |
US3704967A (en) | 1969-12-22 | 1972-12-05 | Luigi Tarulli | Reciprocating pump for concrete |
DE2040400A1 (de) | 1970-08-13 | 1972-02-17 | Bors Heinz J | Vorrichtung zum Foerdern diekfluessiger Stoffe |
US3663129A (en) * | 1970-09-18 | 1972-05-16 | Leon A Antosh | Concrete pump |
US3854694A (en) | 1970-10-01 | 1974-12-17 | M Coone | Apparatus for an aggregate pump |
US3682575A (en) * | 1970-12-10 | 1972-08-08 | Karl Guddal | Concrete pump |
US3829251A (en) * | 1971-02-11 | 1974-08-13 | F Schwing | Squeeze pumps for delivering concrete |
US3771561A (en) * | 1972-03-14 | 1973-11-13 | J Santamaria | Valve |
AU492344B1 (en) | 1973-05-02 | 1975-11-06 | Hubert Jozef Sangen | Concrete pumping apparatus |
ATE59435T1 (de) * | 1987-06-27 | 1991-01-15 | Putzmeister Maschf | Zweizylinder-dickstoffpumpen. |
US4884594A (en) | 1987-10-07 | 1989-12-05 | Marlen Research Corporation | Compact twin piston pump |
DE3738359A1 (de) | 1987-11-12 | 1989-05-24 | Putzmeister Maschf | Dickstoff-pumpe |
DE19641771A1 (de) | 1996-10-10 | 1998-04-16 | Schwing Gmbh F | Dickstoffpumpe |
DE19735091B4 (de) | 1997-08-13 | 2006-03-02 | Schwing Gmbh | Zweizylinder-Dickstoffpumpe |
-
1999
- 1999-11-29 DE DE19957337A patent/DE19957337A1/de not_active Withdrawn
-
2000
- 2000-11-29 ES ES00987322T patent/ES2262556T3/es not_active Expired - Lifetime
- 2000-11-29 US US10/129,953 patent/US6793467B2/en not_active Expired - Lifetime
- 2000-11-29 EP EP00987322A patent/EP1235982B1/de not_active Expired - Lifetime
- 2000-11-29 DE DE50012582T patent/DE50012582D1/de not_active Expired - Lifetime
- 2000-11-29 AU AU23610/01A patent/AU2361001A/en not_active Abandoned
- 2000-11-29 CN CNB00818707XA patent/CN1298996C/zh not_active Expired - Fee Related
- 2000-11-29 WO PCT/EP2000/011966 patent/WO2001040649A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO0140649A1 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009008517A1 (de) | 2009-02-11 | 2010-08-12 | Hudelmaier, Götz | Hydraulischer Antrieb einer Dickstoffpumpe |
DE102012107933A1 (de) | 2012-08-28 | 2014-03-06 | Götz Hudelmaier | Dickstoffpumpe zur Erzeugung eines kontinuierlichen Dickstoffstroms sowie Verfahren zum Betrieb einer Dickstoffpumpe zur Erzeugung eines kontinuierlichen Dickstoffstroms |
DE102012107933B4 (de) * | 2012-08-28 | 2017-09-21 | Götz Hudelmaier | Dickstoffpumpe zur Erzeugung eines kontinuierlichen Dickstoffstroms sowie Verfahren zum Betrieb einer Dickstoffpumpe zur Erzeugung eines kontinuierlichen Dickstoffstroms |
WO2016181405A1 (en) * | 2015-05-08 | 2016-11-17 | Amit Arun Gokhale | A reciprocating piston concrete pump having a force multiplier cum automatic overload protection & disengaging device separate from its drive mechanism |
Also Published As
Publication number | Publication date |
---|---|
AU2361001A (en) | 2001-06-12 |
CN1298996C (zh) | 2007-02-07 |
EP1235982B1 (de) | 2006-04-12 |
DE50012582D1 (de) | 2006-05-24 |
US20030143089A1 (en) | 2003-07-31 |
US6793467B2 (en) | 2004-09-21 |
WO2001040649A1 (de) | 2001-06-07 |
ES2262556T3 (es) | 2006-12-01 |
CN1433506A (zh) | 2003-07-30 |
DE19957337A1 (de) | 2001-05-31 |
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