EP4012181A1 - Dispositif de transport de matières épaisses - Google Patents

Dispositif de transport de matières épaisses Download PDF

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Publication number
EP4012181A1
EP4012181A1 EP21213106.4A EP21213106A EP4012181A1 EP 4012181 A1 EP4012181 A1 EP 4012181A1 EP 21213106 A EP21213106 A EP 21213106A EP 4012181 A1 EP4012181 A1 EP 4012181A1
Authority
EP
European Patent Office
Prior art keywords
thick matter
cylinder
conveying
suction opening
conveying 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.)
Granted
Application number
EP21213106.4A
Other languages
German (de)
English (en)
Other versions
EP4012181B1 (fr
Inventor
Johannes Fetzer
Dominik Bader
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 EP4012181A1 publication Critical patent/EP4012181A1/fr
Application granted granted Critical
Publication of EP4012181B1 publication Critical patent/EP4012181B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders

Definitions

  • the present invention relates to a thick matter conveying device, in particular a concrete pump, according to the preamble of claim 1.
  • thick matter pumps which pump the thick matter from a thick matter collection container into a delivery line by means of hydraulically driven delivery cylinders.
  • the delivery cylinders have an opening at one end which is connected to a corresponding intake opening in the housing of the thick matter collection container in order to be able to suck in the thick matter and then pump it into the delivery line by means of a pump stroke.
  • both tensile and compressive forces occur at the connection points of the delivery cylinders to the high-density matter collection container. It is characteristic that the tensile forces acting outwards are higher than the compressive forces acting in the opposite direction (towards the sludge collection tank).
  • the delivery cylinders are usually connected to the thick matter collection container via tie rods or flange connections and attached to the water box, with both the high tensile and low compressive forces being transmitted in the same way via the same bolted connections.
  • tie rods have a high dead weight, whereas flange connections on the outside of the thick matter collection tank (and on the water box) take up a lot of space, ie take up more space.
  • the object of the present invention is therefore to improve the connection of the delivery cylinders to the thick matter collection container.
  • a thick matter conveying device having the features of claim 1 .
  • a thick matter conveying device is proposed, in particular for conveying concrete, which comprises at least one conveying cylinder, by means of which thick matter can be conveyed from a thick matter collecting container into a conveying line.
  • the delivery cylinder is attached to the thick matter collection container in such a way that tensile forces of the delivery cylinder acting during the delivery of thick matter are transmitted to the thick matter collection container via a positive connection and pressure forces acting in the opposite direction are transmitted to the thick material collection container via a further connection, i.e. a different connection than the aforementioned positive connection.
  • the operating loads are transmitted on separate paths, in contrast to known devices. While the low compressive forces continue to be transmitted via a screw connection, for example, a connection based on positive locking is provided to transmit the higher tensile forces. In addition to a slim design, this enables the use of a connection designed for lower compressive forces, since the higher tensile forces are introduced in a different way by means of a form fit. The use of heavy tie rods can be dispensed with here.
  • the present invention provides a stable connection to the attachment point(s) of the delivery cylinder(s), which guarantees reliable transmission of the high forces during delivery operation and also allows the connection to be easily released from the service side. Furthermore, this type of connection achieves better voltage curves.
  • the further connection is a screw connection, a bolt connection or a positive connection using a securing element or securing ring. Combinations of these connection types for the further connection are also conceivable here.
  • the further connection is preferably not located on an outside of the thick matter collection container.
  • the further connection is therefore not a flange connection on the outside of the thick matter collection container.
  • a more compact design can be achieved by dispensing with bulky flange screw connections, which, for example, enables the use of larger delivery cylinders.
  • the element producing the form fit with the housing of the thick matter collecting container can itself be screwed to the thick matter collecting container.
  • the delivery cylinder has a cylinder housing with a cylinder opening, which is connected to a suction opening formed in a housing of the thick matter collection container, with the form-fitting connection preferably being located in or on the suction opening (or in the region of the suction opening).
  • the cylinder housing can be screwed to the housing of the thick matter collection container in or on the intake opening. Thick matter can be sucked out of the thick matter collection container via the suction opening and pushed through again, in particular via a transfer tube into a delivery line.
  • the suction opening thus also functions as a pressure opening.
  • the cylinder housing is at least partially accommodated in the intake opening.
  • the cylinder housing is thus passed entirely or partially through the intake port. It preferably reaches up to a wear plate mounted on the inside of the sludge collector.
  • the material to be conveyed can pass from the conveying cylinder directly through the wearing plate into the conveying line or a diverter valve that is preferably provided without interfering edges or a throttling effect.
  • the use of intermediate rings can advantageously be dispensed with.
  • the delivery cylinder is positively connected via a stop to a housing of the thick matter collection container.
  • the stop can be formed directly on the cylinder housing, for example as a projection or collar that is welded on or formed in one piece, or can be realized via a separate component.
  • the form fit created by the stop acts in the direction of the acting tensile forces, i.e. outwards starting from the housing of the thick matter collector.
  • a counter-stop is provided on the housing of the thick matter collection container, which interacts with the stop in order to block movement of the delivery cylinder away from the suction opening by means of a form fit, with the counter-stop preferably being formed within the suction opening or formed by the inside of the thick matter collecting container .
  • the counter-stop can be formed, for example, by a groove or edge within the suction opening or simply result from the edge at the transition/mouth area of the suction opening on the inside of the thick matter collection container.
  • the stop is accommodated in a recess, in particular a groove, of the cylinder housing and can preferably be removed from the delivery cylinder.
  • the stop is a separate component from the cylinder housing, which is used to produce the positive connection in the Recess of the cylinder housing can be used. This simplifies the assembly and maintenance of the delivery cylinder of the device according to the invention.
  • the stop is firmly connected to the housing of the thick matter collection container, in particular screwed.
  • This connection is in particular the previously mentioned “further connection” which transmits the pressure forces occurring during the conveyance to the housing of the thick matter collecting container.
  • a space-saving and protected screw connection can be realized by screwing the stop.
  • the screws are countersunk in a corresponding recess so that they do not protrude from the housing.
  • the stop is designed as an insert ring, which is arranged inside the suction opening and is received in a groove that runs at least partially around the cylinder housing, with an edge that runs at least partially surrounding the cylinder housing being designed as a counter-stop, which is connected to the Stop forms a form fit.
  • the insert ring is easy to mount or replace if necessary.
  • the insert ring is firmly connected, in particular screwed, to the counter-stop.
  • the delivery cylinder is held in the suction opening by a component mounted on the inside of the thick matter collecting container, in particular a wearing plate with an opening covering the suction opening.
  • the wear plate can serve as a stop, which is screwed to the inside of the housing of the sludge collector.
  • the intake opening is designed in such a way that the insert ring can be introduced into the intake opening from the inside of the thick matter collection container for mounting on the cylinder housing.
  • the delivery cylinder is pushed into the intake opening from the outside and from the inside of the thick matter collection tank by inserting the insert ring secured.
  • the insert ring is screwed to the housing of the thick matter collector at specially provided points or the wear plate, which fixes the delivery cylinder in the suction opening, is screwed on so that the delivery cylinder is secured against slipping through into the interior.
  • a wearing plate with an opening covering the suction opening is mounted on the inside of the thick matter collecting container, the delivery cylinder reaching through the suction opening to the wearing plate.
  • each of the delivery cylinders is fastened to the thick matter collection container via a form-fitting connection for introducing the tensile forces and a further connection for introducing the compressive forces.
  • the linear delivery cylinders are preferably driven hydraulically, in particular via drive cylinders connected to the axially movable delivery pistons of the delivery cylinders, and can each have one or a common water tank.
  • the thick matter collection container is, in particular, a feed or feed hopper. This can have an agitator to improve the flow of the conveyed material.
  • a hydraulically driven transfer tube is provided in the thick matter collection container, one end of which is permanently connected to the delivery line and the other end of which can be moved back and forth between the suction openings in such a way that the delivery cylinder performing a pumping stroke with is connected to the delivery line, while the delivery cylinder executing the suction stroke is connected to the interior of the thick matter collecting container.
  • the transfer tube which is in particular an S-tube, can be driven by one or more hydraulic swivel cylinders.
  • the fastening according to the invention of the at least one delivery cylinder via a form-fit connection and a further connection can also be provided for fastening the delivery cylinder to a water tank.
  • the water box can be located at an end of the at least one delivery cylinder that is opposite the thick matter collection container.
  • the water tank can be used for cooling, lubrication and/or cleaning.
  • a piston rod of the delivery cylinder is preferably passed through the water tank, with a cylinder housing (quasi as a continuation of the cylinder housing connected to the thick matter collection container) also being able to be located on the other side of the water tank. Access to the interior of the delivery cylinder or to the piston rod is thus obtained in particular via the water tank.
  • connection of the at least one delivery cylinder to the water tank can be designed according to one or more of the embodiments described above.
  • the previous statements therefore apply analogously to the possible connection to the water box.
  • the figure 1 shows a side view of a section through a delivery cylinder 12 of a preferred embodiment of the thick matter delivery device 10 according to the invention.
  • the latter is in particular a concrete pump with two linear delivery cylinders 12 arranged in parallel, which alternately carry out pumping and suction strokes in push-pull and concrete from a thick matter collection container 18, in particular feed hopper 18, pump into a delivery line, not shown here.
  • a hydraulically driven diverter valve (not shown) designed as an S-pipe is permanently connected to the delivery line and is pivoted back and forth between the suction openings 22 formed in the housing 20 of the thick matter collection container 18 such that the delivery cylinder 12 executing the pumping stroke always passes over the transfer tube is connected to the delivery line and concrete is pumped into the delivery line via the associated suction opening 22, while the other delivery cylinder 12 just executing the suction stroke sucks in concrete from the thick matter collecting container 18 via the associated suction opening 22.
  • the figure 2 shows the in the figure 1 attachment area of the delivery cylinder 12 indicated as circle A in an enlarged view.
  • the term "delivery cylinder” is used for the entire piston-cylinder unit.
  • the delivery cylinders 12 comprise a cylinder housing 14 (which could also be referred to as a cylinder tube 14) and have a cylinder opening 16 at the end facing the thick matter collecting container 18, which is connected to the interior of the thick matter collecting container 18 via the suction opening 22.
  • the feed cylinder 12 are attached to the housing 20 of the sludge collector 18, which in the figure 1 is only partially shown.
  • the delivery cylinders 12 are driven in particular by hydraulic drive cylinders (not shown), which are connected to the delivery piston of the associated delivery cylinder 12 via a piston rod that is guided through the water tank 13 .
  • the present invention provides for the delivery cylinder 12 (in the following only one delivery cylinder 12 will be referred to - but the statements obviously apply to all delivery cylinders 12 provided for the thick matter delivery device 10) on the housing in this way 20 of the thick matter collection container 18 so that the strong tensile forces and the weaker compressive forces are introduced into the housing 20 via separate paths, i.e. via different connections 30, 32.
  • the delivery cylinder 12 is positively connected to the housing 20 in the direction of the tensile forces acting, while a screw connection 32 is provided for the transmission of the compressive forces acting in the opposite direction.
  • the positive connection 30 is generated by an insert ring 24 inserted into a circumferential groove 28 provided in the cylinder housing 14 and resting against a circumferential edge 26 formed inside the intake opening 22, which thus forms a counter-stop.
  • the cylinder housing 14 is connected through the intake opening 22 led and held in this.
  • the edge 26 is realized in that the suction opening 22 is enlarged towards the inside 19 of the thick matter collection container 18 , ie a circumferential recess 27 adjoining the suction opening 22 is provided in the housing 20 on the inside 19 .
  • the insert ring 24 is screwed to the edge 26 forming the counter-stop via a screw connection 32 formed by a plurality of screws 33 distributed around the circumference (or via a flange with screws 33).
  • the lengths of the screws 33 are dimensioned in such a way that they are countersunk in the recess 27 and therefore do not protrude into the interior of the thick matter collection container 18 .
  • This makes it possible to attach a wear plate (not shown) for the S-tube to the inside 19 which covers the screw connection 32 .
  • the fastening according to the invention makes it possible to place the feed cylinder 12 completely in the suction opening 22 and to bring it up to the wear plate.
  • the concrete can be pumped directly from the delivery cylinder 12 via the wearing plate into the S-tube without any protruding edges or a throttling effect. Due to the form fit in the main load direction (tensile forces), the screws 33 are subjected to significantly less stress.
  • the diameter of the suction opening 22 tapers slightly from the outside to the insert ring 24 .
  • the thickness of the cylinder housing 14 is correspondingly slightly reduced in steps and has two circumferential seals 23 on the outside in order to seal off the interior of the thick matter collection container 18 from the outside.
  • the cylinder housing 14 is pushed into the suction opening 22.
  • the insert ring 24 is pushed from the inside 19 over the end of the cylinder housing 14 on the inside side, which is made possible by the circumferential recess 27 .
  • the insert ring 24 is placed in the groove 24 so that it rests against the edge 26 and positively blocks displacement of the delivery cylinder 12 in the direction of the outside.
  • the insert ring 24 is fixed in the recess 27 and the feed cylinder 12 is thus fastened. He can't either be moved more towards the inside 19. Now the wear plate or the wear plate can be installed. Replacing the insert ring 24 or the feed cylinder 12 is just as easy.
  • a corresponding combination of positive locking and screw connection can also be provided on the water tank 13 .
  • a circumferential insert ring 24 a plurality of individual stops which engage in corresponding recesses in the cylinder housing 14 can also be provided.
  • assembly is particularly simple.
  • the connection 32 by means of the countersunk screws 33, the wear plate screwed to the inside 19 in any case can be used to produce the further connection 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Treatment Of Sludge (AREA)
  • Screw Conveyors (AREA)
EP21213106.4A 2020-12-10 2021-12-08 Dispositif de transport de matières épaisses Active EP4012181B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020133038.3A DE102020133038A1 (de) 2020-12-10 2020-12-10 Dickstofffördervorrichtung

Publications (2)

Publication Number Publication Date
EP4012181A1 true EP4012181A1 (fr) 2022-06-15
EP4012181B1 EP4012181B1 (fr) 2023-07-05

Family

ID=78824943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21213106.4A Active EP4012181B1 (fr) 2020-12-10 2021-12-08 Dispositif de transport de matières épaisses

Country Status (3)

Country Link
EP (1) EP4012181B1 (fr)
DE (1) DE102020133038A1 (fr)
ES (1) ES2958342T3 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2010246A1 (de) * 1970-03-05 1971-09-23 Putzmeister GmbH, Chur (Schweiz) Hydraulische Betonpumpe
EP0854285A2 (fr) * 1997-01-17 1998-07-22 Gian Guido Ravellini Pompe à béton

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3410211A1 (de) 1984-03-20 1985-10-03 Gerhard Dr. 7900 Ulm Hudelmaier Vorrichtung zum dichten einer betonpumpe
JPH08105378A (ja) 1994-08-09 1996-04-23 Hitachi Zosen Corp 圧送ポンプ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2010246A1 (de) * 1970-03-05 1971-09-23 Putzmeister GmbH, Chur (Schweiz) Hydraulische Betonpumpe
EP0854285A2 (fr) * 1997-01-17 1998-07-22 Gian Guido Ravellini Pompe à béton

Also Published As

Publication number Publication date
EP4012181B1 (fr) 2023-07-05
ES2958342T3 (es) 2024-02-07
DE102020133038A1 (de) 2022-06-15

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