EP4012176B1 - Dispositif de transport de matières épaisses - Google Patents

Dispositif de transport de matières épaisses

Info

Publication number
EP4012176B1
EP4012176B1 EP21203291.6A EP21203291A EP4012176B1 EP 4012176 B1 EP4012176 B1 EP 4012176B1 EP 21203291 A EP21203291 A EP 21203291A EP 4012176 B1 EP4012176 B1 EP 4012176B1
Authority
EP
European Patent Office
Prior art keywords
shaft
bearing
thick matter
pipe switch
delivery device
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.)
Active
Application number
EP21203291.6A
Other languages
German (de)
English (en)
Other versions
EP4012176A1 (fr
Inventor
Johannes Fetzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Mischtecknik GmbH
Original Assignee
Liebherr Mischtecknik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Liebherr Mischtecknik GmbH filed Critical Liebherr Mischtecknik GmbH
Publication of EP4012176A1 publication Critical patent/EP4012176A1/fr
Application granted granted Critical
Publication of EP4012176B1 publication Critical patent/EP4012176B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • F04B7/0034—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 orbital movement, e.g. elbow-pipe type members
    • 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
    • F04B7/0233—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated a common distribution member forming a single discharge distributor for a plurality of pumping chambers
    • F04B7/0241—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated a common distribution member forming a single discharge distributor for a plurality of pumping chambers and having an oscillating movement
    • 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
    • F04B7/0233—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated a common distribution member forming a single discharge distributor for a plurality of pumping chambers
    • F04B7/0258—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated a common distribution member forming a single discharge distributor for a plurality of pumping chambers and having an orbital movement, e.g. elbow-pipe type members

Definitions

  • the present invention relates to a viscous material conveying device, in particular a concrete pump, according to the preamble of claim 1.
  • Special high-viscosity pumps are typically used to convey viscous materials such as concrete. These pumps employ hydraulically driven cylinders to pump the material from a collection container (e.g., a feed hopper) into a delivery line.
  • the cylinders in these pumps have an opening at one end that connects to a corresponding suction opening in the housing of the collection container, allowing the viscous material to be drawn in and then pumped into the delivery line.
  • Such high-solids conveying devices are operated as twin-cylinder pumps with two counter-acting delivery cylinders.
  • a pipe diverter usually designed as an S-pipe, is pivotally mounted inside the high-solids collection tank.
  • One end of this diverter is permanently connected to the conveying line and rotatable relative to it.
  • a typically hydraulic drive pivots the diverter back and forth so that the other opening alternately covers the two suction inlets.
  • the drives of the conveying cylinders and the pipe diverter are coordinated in such a way that the pipe diverter is always connected to the conveying cylinder currently performing a pumping stroke, so that this pumps the viscous material into the conveying line, while the other conveying cylinder, performing a suction stroke, draws viscous material from the interior of the viscous material collection container.
  • the pipe diverter which is a wear part and therefore requires regular maintenance or replacement, is typically rotatably mounted on a rigidly connected shaft in a front bearing on the front wall of the solids collection tank, where the suction openings for the conveying cylinders are located.
  • a rotary actuator typically consisting of two hydraulic rotary cylinders connected to a pivot lever mounted on or integrated into the shaft, is attached to the tank housing to drive the rotation of the shaft and pipe diverter.
  • the forces of the rotary actuator are transmitted as torque to the pipe diverter via the pivot lever, and the bearing also absorbs the loads on the pipe diverter resulting from pump operation.
  • a second, rear bearing is normally located at the back of the solids collection tank in the area of the conveying line and allows the pipe diverter to rotate relative to it.
  • Known solutions typically involve a design with a relatively thick and heavy base plate serving as the front wall (or part of the front wall) of the solids collection tank, housing the diverter valve drive, a one-piece front diverter valve bearing, and a diverter valve with an integrated shaft.
  • Such designs are heavy due to their robust construction.
  • assembling and disassembling such a diverter valve is difficult because the interface between the diverter valve and the pivot lever is located outside the solids collection tank housing. The rear bearing must therefore be removed to allow the shaft to be extracted from the front bearing. This represents a significant disadvantage when assembling or disassembling the heavy and regularly wearing diverter valve.
  • the object of the present invention is therefore to provide a simpler assembly or...
  • a viscous material conveying device is proposed, particularly for conveying concrete, comprising two conveying cylinders by means of which viscous material can be conveyed from a viscous material collection container into a conveying line.
  • the conveying cylinders can be driven such that one of the conveying cylinders performs a pumping stroke while simultaneously the other conveying cylinder performs a suction stroke.
  • a pipe diverter connected to the conveying line is pivotally mounted on the viscous material collection container and can be driven by a shaft rotatably mounted in a front bearing such that it alternately connects the conveying line to the conveying cylinder performing a pumping stroke.
  • the shaft is supported in the front bearing by at least two bearing points and is separable from the pipe diverter.
  • the bearing points are, in particular, axially spaced apart.
  • the double bearing of the shaft in the front bearing allows the slide system and the solids collection container to absorb the load occurring during conveying operation much more effectively than with a single-piece bearing, as the load is distributed across two bearing points.
  • the pipe diverter does not have an integrated shaft; instead, it can be separated and thus removed from the solids collection container without the shaft.
  • the separation point between the shaft and the pipe diverter, and between the pipe diverter and the pivot lever, is located inside the solids collection container.
  • the shaft is provided with a pivot lever by which it can be driven rotationally, the pivot lever preferably being arranged between the two bearing points.
  • This arrangement optimally distributes the load between the two bearing points.
  • the pivot lever preferably projects from one side of the shaft and serves in particular to connect one or more swivel cylinders.
  • the shaft and pivot lever can, in principle, be two separate parts, but preferably form a single unit.
  • the pivot lever is fixedly, and in particular integrally, connected to the shaft.
  • the shaft thus has an integrated pivot lever.
  • At least one hydraulic rotary cylinder is connected to the pivot lever for the rotational drive of the shaft.
  • This rotary cylinder is preferably mounted and/or designed such that the shaft coupled to it is axially displaceable.
  • two rotary cylinders are provided.
  • the at least one rotary cylinder is preferably attached at one end to the pivot lever and mounted at the other end on the solids conveying device, in particular on the solids collection container. Because the rotary cylinder(s) allow a certain axial displacement of the shaft, it can be moved in the front bearing for separation from the pipe diverter without having to remove the rotary cylinder(s). This greatly simplifies assembly and disassembly.
  • the front bearing comprises a removable bearing part which provides one of the two bearing points for the shaft.
  • the front bearing is therefore, in particular, constructed in two parts, although embodiments with more than two bearing parts and/or more than one removable bearing part are also possible.
  • the divisibility of the front bearing allows the shaft to be displaced axially in order to separate it from the pipe diverter.
  • the removable part is located at the end of the front bearing facing away from the pipe diverter and thus functions as a removable end piece.
  • the removable bearing component can also serve as reinforcement for the front wall of the solids collection container, thus eliminating the need for additional reinforcements or clamps to absorb tensile forces. This is particularly advantageous if the front wall is not designed as a solid base plate, as in similar designs, but as a lighter frame construction.
  • the front bearing is designed such that, after removal of the removable bearing part, the shaft can be separated from the pipe diverter by axial displacement relative to the remaining part of the front bearing.
  • the front bearing is arranged in a front wall of the solids collection container designed as a frame structure, the front wall preferably also having two suction openings through which the conveying cylinders are connected to the interior of the solids collection container.
  • the frame construction is lighter than the solid base plates used in previous devices and thus leads to a weight reduction of the entire solids conveying device.
  • the frame structure comprises two side walls, with each bearing point located in the area of one of the side walls. This allows the forces acting on the pipe diverter to be optimally transferred via the bearing points into the front wall or the side walls of the front wall, which is designed as a frame structure.
  • the shaft has a toothed section at the end facing the pipe diverter, which engages with corresponding teeth on the pipe diverter and can be separated from it.
  • the toothed section of the shaft can be separated from the teeth of the pipe diverter by axial displacement of the shaft relative to the pipe diverter.
  • the toothed section converts a rotation of the shaft into a rotation or pivoting movement of the pipe diverter.
  • a releasable locking or fastening mechanism for the shaft in a receptacle of the pipe diverter can be provided.
  • At least one hydraulic swivel cylinder for rotary driving of the shaft is connected to the swivel lever, which is mounted in such a way that, after separating the removable bearing part from the front bearing, the shaft coupled to the swivel cylinder is axially displaceable.
  • a hinged bend provided on the conveying line is opened to relieve the pipe diverter.
  • Figure 1 shows an embodiment of the thick-substantiate conveying device 10 according to the invention, illustrating different steps in the disassembly process of the pipe diverter 18 from the thick-substantiate collection container 14.
  • the drawings depict longitudinal sections through the pipe diverter 18 and its bearings in the front wall 40 of the thick-substantiate collection container 14 and on the conveying line 16. An enlarged section of the front bearing 20, as shown in the Figure 1 The circle shown is in the Figure 6 to see.
  • the pipe diverter 18 which is designed as an S-pipe, serves to alternately connect the conveying line 16 to one of two hydraulically driven conveying cylinders 12.
  • the conveying cylinders 12 have cylinder openings at their ends facing the solids collection container 14, which cover corresponding suction openings in the front wall 40. Through these suction openings, they alternately draw solids (e.g., concrete) from the solids collection container 14 and, by means of a pump stroke, push them through the pipe diverter 18 into the conveying line 16.
  • solids e.g., concrete
  • the front end of the pipe diverter 18, which faces the pumping cylinders 12, is pivoted back and forth between the suction openings, so that the pumping cylinder 12 that is currently pumping is always connected to the pumping line 16, while the other pumping cylinder 12 draws in thick material through the free suction opening.
  • the pipe diverter 18 is rotatably attached to the conveying line 16 via a rear bearing 21.
  • the connection of the pipe diverter 18 to the rear bearing 21 can be detached for disassembly of the pipe diverter 18.
  • the pipe diverter 18 is pivotally mounted in a front bearing 20 on the front wall 40 of the solids collection container 14.
  • a shaft 22 is connected to the pipe diverter 18 and is rotatably mounted in the front bearing 20.
  • the front bearing 20 is integrated into the front wall 40 and is designed as a two-part bearing with two axially spaced bearing surfaces 24, over which the shaft 22 is supported.
  • the shaft 22 has a radially projecting pivot lever 26, which is integrally, i.e., inseparably, connected to the shaft 22.
  • Two hydraulic swivel cylinders (not shown) are attached to the end of the pivot lever 26 and are synchronized with the hydraulic drive of the conveying cylinders 12 in such a way that the movement of the pipe diverter 18 described above is achieved.
  • the front wall 40 of the thick material collection container 14 forms a frame structure with two side walls, between which the swivel lever 26 and the swivel cylinders are arranged. This optimally protects these components from The frame construction protects the pump from contamination and damage typical of pump operation. Furthermore, the frame design results in a significantly lighter construction of the solids collection tank 14 than would be possible with a one-piece base plate of the same thickness as the entire frame structure.
  • the two-part bearing arrangement of the shaft 22, via the two bearing points 24 located above or in the area of one of the two side walls of the front wall 40 optimally absorbs the forces and loads and transfers them into the front wall 40.
  • the fully assembled state of the pipe diverter 18 and the front bearing 20 is shown in the Figure 1 An enlarged view of the front bearing 20 is shown in the Figure 6 to see.
  • the front bearing 20 comprises a bearing part 30 that is permanently integrated into (i.e., remaining in) the front wall 40, and a bearing part 28 that is removable from the front wall 40, with one of the bearing points 24 being arranged in/on each of the two bearing parts 28, 30.
  • the removable bearing part 28 forms the end part of the front bearing 20 that encloses the shaft 22 at its end facing away from the pipe diverter 18.
  • the removable bearing part 28 can be detachably connected or locked to the front wall 40 and/or to the remaining bearing part 30.
  • the shaft 22 has a radially circumferential toothing 32 at its other end, the end facing the pipe diverter 18. In the assembled state, this toothing engages with corresponding teeth in a receptacle 34 located at the upper end of the pipe diverter 18, which surrounds the end of the shaft 22. The engagement of the teeth translates a rotational movement of the shaft 22 into a pivoting movement of the conveying cylinder-side opening of the pipe diverter 18.
  • the separable connection of the shaft 22 in the receptacle 34 of the pipe diverter 18 may include an additional releasable connection or locking mechanism.
  • the rear bearing 21 of the pipe diverter 18 is then detached from the conveying line 16.
  • the rear bearing 21 can remain attached to either the pipe diverter 18 or the conveying line 16.
  • the rear bearing 21 is composed of several parts, with one part remaining attached to the pipe diverter 18 and another part remaining attached to the conveying line 16. It may be provided that the bearing, or the part remaining attached to the conveying line 16, can be moved rearward for the removal of the pipe diverter 18 without being completely removed.
  • the conveying line 16 also has a pivotable hinged bend 36. This is opened before the pipe diverter 18 is removed in order to relieve the pipe diverter 18. Now the pipe diverter 18 can be removed from the solids collection container 14, as shown in the Figure 5
  • the shaft 22, including the pivot lever 26, remains in the front bearing 20 or in the remaining bearing part 30.
  • the pipe diverter 18 is assembled in reverse order.
  • the removable bearing part 28 also serves to reinforce the frame construction of the front wall 40, so that additional reinforcements or clamps to absorb the tensile forces are no longer necessary.
  • FIG. 7 Figure 1 shows the front bearing 20 of the pipe diverter 18, which is designed as an S-pipe, of a thick material conveying device known from the prior art.
  • the shaft 22 is fixedly installed in or connected to the pipe diverter 18 and supported by a one-piece front bearing 20 in a solid base plate.
  • the front wall 40 of the thick material collection container 14 is supported.
  • a pivot lever 26 is attached to the outside of the thick material collection container 14, at the end of the shaft 22 opposite the pipe diverter 18, to which the pivot cylinders (not shown) are connected.
  • the pivot lever 26 is detached from the shaft 22, meaning the separation point between the pipe diverter 18 and the pivot lever 26 lies outside the solids collection container 14.
  • the shaft 22 must also be removed and laboriously maneuvered out of the front bearing 20, which is difficult due to the massive and heavy construction of the pipe diverter 18.
  • the rear bearing 21 of the pipe diverter 18 must be laboriously dismantled to allow the shaft 22 to be removed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Refuse Collection And Transfer (AREA)
  • Screw Conveyors (AREA)

Claims (13)

  1. Dispositif de transport de matière épaisse (10), notamment pour le transport de béton, comportant deux vérins de transport (12) au moyen desquels de la matière épaisse peut être transportée d'un récipient collecteur de matière épaisse (14) vers une conduite de transport (16), les vérins de transport (12) pouvant être entraînés de telle sorte que l'un des vérins de transport (12) effectue une course de pompage tandis que l'autre vérin de transport (12) effectue simultanément une course d'aspiration, et un inverseur de tuyauterie (18) relié à la conduite de transport (16) étant monté de manière pivotante sur le récipient collecteur de matière épaisse (14), lequel aiguillage peut être entraîné par l'intermédiaire d'un arbre (22) monté de manière rotative dans un palier avant (20) de telle sorte qu'il relie la conduite de transport (16) en alternance avec le vérin de transport (12) effectuant respectivement une course de pompage, l'arbre (22) étant monté dans le palier avant (20) par l'intermédiaire d'au moins deux points d'appui (24) et pouvant être séparé de l'inverseur de tuyauterie (18),
    caractérisé en ce que
    le palier avant (20) comprend une partie de palier amovible (28) qui présente l'un des deux points d'appui (24) pour l'arbre (22), la partie de palier amovible (28) se trouvant à l'extrémité du palier avant (20) détournée de l'inverseur de tuyauterie (18) et servant de pièce d'extrémité amovible.
  2. Dispositif de transport de matière épaisse (10) selon la revendication 1, caractérisé en ce que l'arbre (20) présente un levier pivotant (26) par l'intermédiaire duquel il peut être entraîné en rotation, le levier pivotant (26) étant de préférence agencé entre les deux points d'appui (24).
  3. Dispositif de transport de matière épaisse (10) selon la revendication 2, caractérisé en ce que le levier pivotant (26) est relié de manière fixe, notamment d'un seul tenant, à l'arbre (22).
  4. Dispositif de transport de matière épaisse (10) selon la revendication 2 ou 3, caractérisé en ce qu'au moins un vérin pivotant hydraulique est relié au levier pivotant (26) pour entraîner en rotation l'arbre (22), lequel est de préférence monté de telle manière et/ou réalisé de telle sorte que l'arbre (22) couplé au vérin pivotant peut être déplacé axialement.
  5. Dispositif de transport de matière épaisse (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le palier avant (20) est réalisé de telle sorte qu'après avoir retiré la partie de palier amovible (28), l'arbre (22) peut être séparé de l'inverseur de tuyauterie (18) par déplacement axial par rapport à la partie restante (30) du palier avant (20).
  6. Dispositif de transport de matière épaisse (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le palier avant (20) est agencé dans une paroi avant (40) du récipient collecteur de matière épaisse, réalisée sous forme de structure en cadre (14), la paroi avant (40) présentant de préférence en outre deux ouvertures d'aspiration par l'intermédiaire desquelles les vérins de transport (12) sont reliés à l'espace intérieur du récipient collecteur de matière épaisse (14).
  7. Dispositif de transport de matière épaisse (10) selon les revendications 4 et 6, caractérisé en ce que le levier pivotant (26) et l'au moins un vérin pivotant sont agencés à l'intérieur de la structure en cadre de la paroi avant (40).
  8. Dispositif de transport de matière épaisse (10) selon la revendication 6 ou 7, caractérisé en ce que la structure en cadre comprend deux parois latérales, chacun des points d'appui (24) étant agencé dans la zone de l'une des parois latérales.
  9. Dispositif de transport de matière épaisse (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'arbre (22) présente, à l'extrémité tournée vers l'inverseur de tuyauterie (18), une denture (32) qui s'engrène avec une denture correspondante de l'inverseur de tuyauterie (18) et peut être séparée de celle-ci, notamment par déplacement axial de l'arbre (22) par rapport à l'inverseur de tuyauterie (18).
  10. Dispositif de transport de matière épaisse (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'inverseur de tuyauterie (18) est monté de manière rotative dans une zone arrière du récipient collecteur de matière épaisse (14), notamment dans la zone de la conduite de transport (16), par l'intermédiaire d'un palier arrière (21).
  11. Dispositif de transport de matière épaisse (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'inverseur de tuyauterie (18) est un tuyau en S, le palier avant (20) étant de préférence agencé au-dessus de deux ouvertures d'aspiration par l'intermédiaire desquelles les vérins de transport (12) sont reliés à l'espace intérieur du récipient collecteur de matière épaisse (14).
  12. Procédé de démontage de l'inverseur de tuyauterie (18) d'un dispositif de transport de matière épaisse (10) selon la revendication 5, comprenant les étapes suivantes :
    - le retrait de la partie de palier amovible (28) du palier avant (20),
    - le déplacement axial de l'arbre (22) par rapport à la partie restante (30) du palier avant (20) en direction du côté extérieur du récipient collecteur de matière épaisse (14) afin de séparer l'arbre (22) de l'inverseur de tuyauterie (18),
    - le détachement de la liaison de l'inverseur de tuyauterie (18) à la conduite de transport (16), et
    - la sortie de l'inverseur de tuyauterie (18) du récipient collecteur de matière épaisse (14).
  13. Procédé selon la revendication 12, caractérisé en ce qu'au moins un vérin pivotant hydraulique est relié au levier pivotant (26) pour entraîner en rotation l'arbre (22), lequel est monté de telle sorte qu'après la séparation de la partie de palier amovible (28) du palier avant (20), l'arbre (22) couplé au vérin pivotant peut être déplacé axialement.
EP21203291.6A 2020-12-10 2021-10-18 Dispositif de transport de matières épaisses Active EP4012176B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020133021.9A DE102020133021A1 (de) 2020-12-10 2020-12-10 Dickstofffördervorrichtung

Publications (2)

Publication Number Publication Date
EP4012176A1 EP4012176A1 (fr) 2022-06-15
EP4012176B1 true EP4012176B1 (fr) 2025-12-31

Family

ID=78500405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21203291.6A Active EP4012176B1 (fr) 2020-12-10 2021-10-18 Dispositif de transport de matières épaisses

Country Status (2)

Country Link
EP (1) EP4012176B1 (fr)
DE (1) DE102020133021A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2244085B1 (fr) * 1973-09-17 1979-10-19 Case Co J I
DE2632816C2 (de) * 1976-07-21 1982-07-29 Friedrich Wilh. Schwing Gmbh, 4690 Herne Abdichtvorrichtung für eine Doppelzylinderpumpe, insbesondere für die Förderung von Beton
DE2729159A1 (de) 1977-06-28 1979-01-11 Rotacrete Ltd Kolbenpumpe
GB1585794A (en) 1977-07-05 1981-03-11 Relf D Reciprocating pumps
DE2903749C2 (de) * 1979-02-01 1983-11-10 Karl Dipl.-Ing. 7000 Stuttgart Schlecht Kolbenpumpe mit S-förmig gekrümmtem Schwenkrohr
DE2933128C2 (de) * 1979-08-16 1985-09-26 Friedrich Wilh. Schwing Gmbh, 4690 Herne Dickstoffpumpe, insbesondere zur Förderung von Beton
US4298288A (en) * 1980-01-25 1981-11-03 Anthony Industries, Inc. Mobile concreting apparatus and method
AU7811481A (en) * 1980-11-28 1982-06-03 H.A. Wentworth Pty Ltd Swinging value for twin cylinder concrete pump
GB2416569A (en) 2004-07-27 2006-02-01 Clarke Uk Ltd Method of and a pump for pumping drill cuttings

Also Published As

Publication number Publication date
DE102020133021A1 (de) 2022-06-15
EP4012176A1 (fr) 2022-06-15

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