EP4012178B1 - Dispositif de transport des matières épaisses et procédé de fonctionnement des dispositifs d'agitation d'un tel dispositif - Google Patents

Dispositif de transport des matières épaisses et procédé de fonctionnement des dispositifs d'agitation d'un tel dispositif Download PDF

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Publication number
EP4012178B1
EP4012178B1 EP21202416.0A EP21202416A EP4012178B1 EP 4012178 B1 EP4012178 B1 EP 4012178B1 EP 21202416 A EP21202416 A EP 21202416A EP 4012178 B1 EP4012178 B1 EP 4012178B1
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EP
European Patent Office
Prior art keywords
stirring
density matter
conveying
conveying device
suction
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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
EP21202416.0A
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German (de)
English (en)
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EP4012178A1 (fr
Inventor
Johannes Fetzer
Dominik Bader
Tommy Stoffel
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
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Liebherr Mischtecknik GmbH
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Publication of EP4012178A1 publication Critical patent/EP4012178A1/fr
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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
    • 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

Definitions

  • the present invention relates to a thick matter conveying device, in particular a concrete pump, according to the preamble of claim 1 and a method for operating the stirring devices of such a thick matter conveying device.
  • Special high-density pumps are usually used to convey high-density materials such as concrete, which pump the high-density material from a generally funnel-shaped collection container into a delivery line by means of hydraulically driven delivery cylinders.
  • the delivery cylinders each have an opening at one end, which is connected to a corresponding suction opening in the housing of the feed hopper in order to be able to suck in the thick matter and then pump it into the delivery line.
  • Such thick matter conveying devices are often operated as two-cylinder pumps with two conveying cylinders working in push-pull.
  • a diverter valve is usually pivotally mounted within the thick matter collection tank, which is permanently connected to the delivery line at one end and is pivoted back and forth by a typically hydraulic drive in such a way that that the other opening of the transfer tube alternately covers the two suction openings.
  • the drives of the delivery cylinder and the diverter tube are coordinated in such a way that the diverter tube is always connected to the delivery cylinder that is currently executing a pump stroke, so that this thick matter pumps into the delivery line, while the other delivery cylinder, executing a suction stroke, sucks thick matter from the interior of the thick matter collection container .
  • agitators In order to keep the thick matter in the thick matter collection container in motion and to continuously feed it to the intake openings or delivery cylinders, agitators with rotating stirring elements or stirring paddles are typically used, which are arranged inside the thick matter collection container. This ensures that there is always excess thick matter at the intake openings and thick matter is prevented from sticking/binding in the collection container.
  • the axes of rotation of the agitators are collinear with one another and aligned transversely to the longitudinal direction of the delivery cylinder.
  • the agitator motors protrude from the side of the collection container housing, blocking space for the delivery line at this point and making access to the collection container opening more difficult.
  • the agitators can neither optimally transport the thick matter out of dead zones nor effectively guide it to the delivery cylinders. Furthermore, in known devices, the agitators must be permanently in operation due to the suboptimal supply of thick matter, which leads to increased wear and tear and energy consumption.
  • the object of the present invention is therefore to provide a thick matter conveying device with an improved agitator which overcomes the aforementioned problems.
  • a more energy-efficient and low-wear operation of the agitator should be made possible.
  • a thick matter conveying device having the features of claim 1 .
  • a thick matter conveying device is proposed, in particular for conveying concrete, the two conveying cylinders, by means of which thick matter can be conveyed from a thick matter collecting container into a conveying line, and comprises two rotatable stirring devices arranged inside the thick matter collecting container for stirring or mixing the thick matter.
  • the delivery cylinders are connected to the interior of the thick matter collection container via two intake openings and can be driven in push-pull such that one of the delivery cylinders performs a pumping stroke to pump thick matter into the delivery line, while the other delivery cylinder simultaneously performs a suction stroke to suck in thick matter from the thick matter collection container.
  • the axes of rotation of the stirring devices are not oriented collinear to one another.
  • the non-collinear arrangement of the agitators improves sludge flow within the sludge storage tank.
  • the thick matter can thus be guided more effectively to the suction openings or delivery cylinders.
  • the non-collinear alignment of the stirring devices according to the invention makes it possible to mount the drives or motors of the stirring devices in a more space-saving and protected manner on the thick matter collecting container than is the case with collinear solutions with laterally mounted drives.
  • the drives can be attached to the thick matter collection tank in such a way that the required installation space is not used up at the expense of other functions.
  • the drives can be arranged in such a way that they are not in the dirty area or in an area in which there is a risk of contamination and/or damage during operation and are therefore better protected.
  • the axes of rotation of the stirring devices are not oriented parallel to one another, with the extensions of the axes of rotation preferably intersecting at a common point.
  • the axes of rotation thus assume an acute angle (between 0° and 90°) relative to one another and are arranged in particular axially symmetrically within the thick matter collecting container. Due to the oblique arrangement of the axes of rotation, the thick matter can be conveyed better in the direction of the delivery cylinder and a space-saving arrangement of the stirring devices and their drives can be achieved.
  • each stirring device is assigned to one of the suction openings, with the axes of rotation of the stirring devices essentially pointing in the direction of the respectively assigned suction opening.
  • the latter feature is to be understood in such a way that the axes of rotation of the stirring devices point either directly to the intake openings or to a point to the side of it in the area of the intake openings.
  • the axes of rotation point directly to the suction openings (especially in a pushing operation) or slightly offset to the side (especially in suction operation, in which the drives are arranged in the area or on the side of the suction openings). In any case, the axes of rotation point more or less into the area of the suction openings where the excess thick matter is required, so that the thick matter is effectively conveyed to the delivery cylinders.
  • the axes of rotation of the stirring devices run neither in a horizontal nor in a vertical plane. Rather, the axes of rotation run obliquely in space within the thick material cylinder. This achieves a space-saving and gentle arrangement of the drives of the stirring devices and effective conveyance of thick matter.
  • the axes of rotation of the stirring devices assume an angle of less than 45° to the longitudinal axes of the delivery cylinders in plan view.
  • the axes of rotation are arranged approximately along the longitudinal axes of the delivery cylinders.
  • the stirring devices each comprise a drive arranged outside of the thick matter collecting container and a stirring element arranged inside the thick matter collecting container and rotatably drivable by the drive.
  • the drive is in particular a motor that drives the stirring element, for example a worm, screw, spiral or paddle, in rotation.
  • the drives are preferably attached to the outside of the thick matter collection container.
  • the stirring elements essentially have the shape of a helix, in particular a double helix, or a screw or snail.
  • the thick matter-carrying elements or surfaces of the stirring elements according to the invention are themselves helical or helix-shaped and preferably do not require supporting elements such as shafts or spirals.
  • the suction openings are formed in a front wall of the thick matter collection container, with the drives being arranged in particular in the area of the front wall and being designed to operate the stirring elements in suction operation or suction mode, in which thick matter is sucked in the direction of the suction openings becomes.
  • the conveying line preferably opens into a rear wall of the thick matter collecting container which is opposite the front wall.
  • the feature that the drives are arranged in the area of the front wall also includes an arrangement in which the drives are arranged on the adjacent side walls in the area of the front wall or in the area of the base plate.
  • the stirring elements are driven in such a way that the thick matter is sucked in the direction of the suction opening (whereby exactly taken also with the so-called “suction” here, a pressing or conveying of thick matter in the direction of the suction openings takes place, however - in comparison to a pressing operation in which the thick matter is pressed away from the drives - in the direction of the drives of the stirring devices).
  • the front wall therefore defines an intake side on which the delivery cylinders are located, while the rear wall defines an outlet side on which the delivery line is located.
  • the delivery line opens into a rear wall of the thick matter collection container, with the drives being arranged in particular in the area of the rear wall and being designed to operate the stirring elements in a pressure operation or pressure mode, in which thick matter is pressed in the direction of the suction openings becomes.
  • the suction openings are preferably formed in a front wall of the thick matter collecting container which is opposite the rear wall.
  • the feature that the drives are arranged in the area of the rear wall 16 also includes an arrangement in which the drives are arranged on the adjacent side walls in the area of the rear wall or in the area of the base plate. In the pressing operation, the stirring elements are driven in such a way that the thick material is pressed in the direction of the suction opening.
  • the stirring device may be more sensible to arrange the stirring device in suction mode or in pressure mode.
  • the flexibility of the arrangement of the drives due to the non-collinear alignment of the axes of rotation of the stirring devices or stirring elements according to the invention makes it possible to provide suction or pressure operation depending on the requirement and to place the drives on the outside of the thick matter collection container in such a way that the required installation space is not used up at the expense of other functions becomes.
  • the drives can be arranged in such a way that they are not in the dirty area and are therefore better protected against contamination and/or damage.
  • a further embodiment provides that each stirring device is assigned to one of the delivery cylinders (or one of the suction openings), the stirring devices being operable sequentially such that each stirring device is only in operation during a suction stroke of the assigned delivery cylinder.
  • the associated stirring device is inactive, so that the stirring devices are always operated alternately and synchronized with the delivery cylinders. Sequential operation of the agitators reduces power consumption and wear on the sludge conveyor while preventing sludge from sticking/binding in the sludge collector.
  • a diverter valve connected to the delivery line and preferably designed as an S-tube is pivotably mounted on the thick matter collection container, which can be driven in such a way that it alternately connects the delivery line to the delivery cylinder performing a pump stroke.
  • the thick matter collection container is preferably designed as a feed hopper.
  • the delivery cylinders are hydraulically driven in particular.
  • the delivery line can have a folding pipe.
  • the present invention further relates to a method for operating the stirring devices of a thick matter conveying device according to the invention.
  • each stirring device is assigned to one of the delivery cylinders, with the stirring devices being operated alternately, so that each stirring device is only in operation when the assigned delivery cylinder is currently performing a suction stroke.
  • the associated stirring device is inactive during a pumping stroke.
  • Power consumption and wear of the sludge conveyor device increase significantly.
  • the operation of the stirring devices for driving the delivery cylinders and a preferably provided transfer tube is synchronized.
  • the Figures 1a and 1b show a first exemplary embodiment of the thick matter conveying device 10 according to the invention, only the (left) half of the thick matter conveying device 10 being shown in each case.
  • the Figure 1a shows a side view looking at the rear wall 16, while the Figure 1b shows a view from above.
  • the thick matter conveying device 10 comprises a thick matter collection container 12 designed as a feed hopper or feed hopper, which has a front wall 14 with two suction openings 18 to which two hydraulically driven conveying cylinders (not shown) are connected. On the rear wall 16 opposite the front wall 14 (which is shown in the Figure 1a can be seen from the outside), an opening 20 is provided, via which the delivery line (not shown) is connected to the thick matter collection container 12.
  • the thick matter collection container 12 has a cleaning opening 24 with cleaning flap on the underside, which in the Figures 1a-b half can be seen.
  • the position of one of the suction openings 18 is in the Figure 1b represented by an arrow.
  • the thick matter conveying device 10 is a concrete pump designed as a two-piston pump, the two linear conveying cylinders alternately performing pumping and suction strokes in push-pull and pumping concrete from the thick matter collecting container 12 into the conveying line.
  • a hydraulically driven transfer tube (not shown here for the sake of clarity) is permanently connected to the delivery line and is pivoted back and forth between the suction openings 18 in such a way that the delivery cylinder performing the pumping stroke is always connected to the delivery line via the transfer tube, while the other , straight the suction stroke exporting delivery cylinder sucks concrete from the thick matter collection container 12.
  • the thick matter conveying device 10 comprises two separately driven stirring devices (not shown), which each comprise a drive, in particular a motor, arranged outside of the thick matter collecting container 12 and a stirring element 22 that can be driven in rotation by this.
  • the stirring elements 22 are spaced apart from one another and arranged symmetrically within the thick matter collecting container 12 and are used to stir or mix the concrete in the thick matter collecting container 12 so that there is always enough concrete at the suction openings 18 for the suction strokes of the delivery cylinders is available and so that the concrete is kept in motion in order to prevent the concrete from settling or setting.
  • the axes of rotation of the stirring devices or the stirring elements 22 are not collinear, but arranged obliquely (i.e. they run neither in a vertical plane parallel to the side walls of the thick matter collecting container 12 nor in a horizontal plane, but freely in space).
  • the axes of rotation are aligned in such a way that they essentially point in the direction of the suction openings 18 . So you run in the longitudinal direction rather than transverse to the longitudinal axes of the conveyor cylinder.
  • the stirring devices operate in push mode.
  • the drives are arranged in the area of the rear wall 16 of the thick matter collection container 12 .
  • the stirring elements 22 are driven in such a way that they push the concrete away from the drives in the direction of the suction openings 18 (pushing operation or pushing mode).
  • the drive is arranged in the upper corner area on the rear wall 16 of the thick matter collection container 12 so that the axis of rotation of the stirring device points obliquely downwards in the direction of the suction opening 18 .
  • all areas and corners of the interior of the thick matter collection container 12 are covered, which increases the effectiveness of the concrete pump 10 .
  • the arrangement of the drives in the area of the rear wall 16 means that they take up less critical installation space for other functions of the concrete pump on the sides. In addition, the drives in this area are better protected against dirt and damage.
  • FIGS. 2a-b show analogous to the views of Figures 1a-b the right halves of a second embodiment of the thick matter collection container 12 with a view of the rear wall 16 ( Figure 2a ) and in top view ( Figure 2b ).
  • the drives of the stirring devices are now arranged in the area of the front wall 14 of the thick matter collection container 12, i.e. on the side of the suction openings 18.
  • the stirring devices must therefore work in suction mode, in which the stirring elements 22 are driven in such a way that they concrete in the direction of the suction openings 18 "pull towards you" (suction operation or suction mode).
  • the drives are arranged in the area of the upper side, so that the axes of rotation run obliquely in space.
  • the position of one of the suction openings 18 is in the Figure 2b represented by an arrow.
  • the areas of action of the stirring devices are again shown as hatched quadrant segments or angular areas 30, with area 32 (the area of the right-angled corner) indicating the position of the drive in each case.
  • the axes of rotation are oriented in a similar way as in the push mode, with the axes of rotation running laterally next to the suction openings 18 due to the placement next to the suction openings 18 .
  • there are no dead zones so that the concrete is effectively conveyed to the suction openings 18 .
  • the conveying direction of the thick matter is again through a dashed arrow 40 indicated (in the suction mode, the arrow 40 points to the position 32 of the drive).
  • the thick matter conveying device 10 also enables a sequential drive of the stirring devices, in which only that stirring element 22 is driven which is assigned to the delivery cylinder just executing a suction stroke.
  • the stirring devices are operated alternately, synchronously with the feed cylinders. Only the stirring device required to support the suction is operated. On average, the stirring elements are idle for approximately half the operating time of the concrete pump 10 . As a result, wear and tear and energy consumption or drive power can be reduced, while sufficient mixing of the concrete continues to take place.
  • the figures 3a-d show four exemplary embodiments for stirring elements 22, which can be used in the thick matter conveying device 10 according to the invention.
  • the in the Figures 3a-b The stirring elements 22 shown have the shape of a double helix, the ends of which are connected to one another and lie on the axis of rotation.
  • the Figure 3a shows a form with a whorl in side view (above) and frontal view (below) and the Figure 3b an alternative form with two turns only in a side view.
  • stirring elements 22 have the shape of a screw, the embodiment according to Figure 3c rounded or curved edges and the embodiment according to Figure 3d Has angular or kinked edges or surfaces.
  • a characteristic feature of the stirring elements 22 shown here is the helix (or double helix) or screw shape.
  • the shapes shown here merely represent exemplary shapes for the stirring elements 22 according to the invention. Diverse variations are possible here. What the forms have in common is that they are not load-bearing Elements such as waves can get along and allow efficient suction or pushing of thick matter.
  • a common drive of the stirring elements 22 via a central shaft or central shaft can be dispensed with in the thick matter conveying device 10 according to the invention.
  • the stirring elements 22 can be driven individually and independently of one another. This increases the effectiveness of the stirring and conveying performance. This also prevents thick matter from adhering to the central shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)

Claims (12)

  1. Dispositif de transport de matière épaisse (10), notamment pour le transport de béton, comprenant deux cylindres de transport, au moyen desquels une matière épaisse peut être transportée à partir d'un récipient collecteur de matière épaisse (12) dans une conduite de transport, et deux dispositifs d'agitation rotatifs agencés à l'intérieur du récipient collecteur de matière épaisse (10) pour le brassage de la matière épaisse, les cylindres de transport étant reliés par l'intermédiaire de deux ouvertures d'aspiration (18) à l'espace intérieur du récipient collecteur de matière épaisse (12) et pouvant être entraînés de telle sorte que l'un des cylindres de transport effectue une course de pompage tandis que l'autre cylindre de transport effectue simultanément une course d'aspiration,
    caractérisé en ce que
    les axes de rotation des dispositifs d'agitation sont orientés de manière non colinéaire l'un par rapport à l'autre.
  2. Dispositif de transport de matière épaisse (10) selon la revendication 1, caractérisé en ce que les axes de rotation des dispositifs d'agitation ne sont pas orientés parallèlement l'un à l'autre, les prolongements des axes de rotation se coupant de préférence en un point commun.
  3. Dispositif de transport de matière épaisse (10) selon la revendication 1 ou 2, caractérisé en ce que chaque dispositif d'agitation est associé à une ouverture d'aspiration (18), les axes de rotation des dispositifs d'agitation pointant essentiellement en direction de l'ouverture d'aspiration (18) associée.
  4. Dispositif de transport de matière épaisse (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que les axes de rotation des dispositifs d'agitation ne s'étendent ni dans un plan horizontal ni dans un plan vertical.
  5. Dispositif de transport de matière épaisse (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que les axes de rotation des dispositifs d'agitation forment, en vue de dessus, un angle inférieur à 45° par rapport aux axes longitudinaux des cylindres de transport.
  6. Dispositif de transport de matière épaisse (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que les dispositifs d'agitation comprennent chacun un entraînement agencé à l'extérieur du récipient collecteur de matière épaisse (12) ainsi qu'un élément d'agitation (22) agencé à l'intérieur du récipient collecteur de matière épaisse (12) et pouvant être entraîné en rotation par l'entraînement.
  7. Dispositif de transport de matière épaisse (10) selon la revendication 6, caractérisé en ce que les éléments d'agitation (22) présentent essentiellement la forme d'une hélice, notamment d'une double hélice, ou d'une vis, et ne comprennent de préférence aucun élément porteur.
  8. Dispositif de transport de matière épaisse (10) selon la revendication 6 ou 7, caractérisé en ce que les ouvertures d'aspiration (18) sont formées dans une paroi avant (14) du récipient collecteur de matière épaisse (12) et la conduite de transport débouche de préférence dans une paroi arrière (16) du récipient collecteur de matière épaisse (12) située en face de la paroi avant (14), les entraînements étant agencés notamment dans la zone de la paroi avant (14) et étant conçus pour faire fonctionner les éléments d'agitation (22) dans un mode d'aspiration dans lequel la matière épaisse est aspirée en direction des ouvertures d'aspiration (18).
  9. Dispositif de transport de matière épaisse (10) selon la revendication 6 ou 7, caractérisé en ce que la conduite de transport débouche dans une paroi arrière (16) du récipient collecteur de matière épaisse (12) et les ouvertures d'aspiration (18) sont de préférence formées dans une paroi avant (14) du récipient collecteur de matière épaisse (12) située en face de la paroi arrière (16), les entraînements étant agencés notamment dans la zone de la paroi arrière (16) et étant conçus pour faire fonctionner les éléments d'agitation (22) dans un mode de pression dans lequel la matière épaisse est pressée en direction des ouvertures d'aspiration (18).
  10. Dispositif de transport de matière épaisse (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque dispositif d'agitation est associé à l'un des cylindres de transport, les dispositifs d'agitation pouvant fonctionner séquentiellement de telle sorte que chaque dispositif d'agitation ne fonctionne que pendant une course d'aspiration du cylindre de transport associé.
  11. Dispositif de transport de matière épaisse (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que, sur le récipient collecteur de matière épaisse (12), est monté pivotant un aiguillage tubulaire relié à la conduite de transport et configuré de préférence sous la forme d'un tube en S, qui peut être entraîné de telle sorte qu'il relie la conduite de transport alternativement au cylindre de transport effectuant respectivement une course de pompage.
  12. Procédé pour faire fonctionner les dispositifs d'agitation d'un dispositif de transport de matière épaisse (10) selon l'une quelconque des revendications précédentes, dans lequel chaque dispositif d'agitation est associé à l'un des cylindres de transport et dans lequel les dispositifs d'agitation fonctionnent en alternance de telle sorte que chaque dispositif d'agitation ne fonctionne que lorsque le cylindre de transport associé effectue une course d'aspiration.
EP21202416.0A 2020-12-10 2021-10-13 Dispositif de transport des matières épaisses et procédé de fonctionnement des dispositifs d'agitation d'un tel dispositif Active EP4012178B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020133022.7A DE102020133022A1 (de) 2020-12-10 2020-12-10 Dickstofffördervorrichtung und Verfahren zum Betrieb der Rührvorrichtungen einer solchen

Publications (2)

Publication Number Publication Date
EP4012178A1 EP4012178A1 (fr) 2022-06-15
EP4012178B1 true EP4012178B1 (fr) 2023-08-16

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EP21202416.0A Active EP4012178B1 (fr) 2020-12-10 2021-10-13 Dispositif de transport des matières épaisses et procédé de fonctionnement des dispositifs d'agitation d'un tel dispositif

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Country Link
EP (1) EP4012178B1 (fr)
DE (1) DE102020133022A1 (fr)
ES (1) ES2964688T3 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989010486A1 (fr) * 1988-04-23 1989-11-02 Putzmeister-Werk Maschinenfabrik Gmbh Recipient d'alimentation pour pompes a liquides epais

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06288340A (ja) 1993-04-05 1994-10-11 Ishikawajima Constr Mach Co 粘性流体用ホッパ内攪拌機の制御装置
JPH08144942A (ja) * 1994-11-24 1996-06-04 Ishikawajima Constr Mach Co 揺動弁形コンクリートポンプ
DE19820509A1 (de) * 1998-05-08 1999-11-11 Putzmeister Ag Materialaufgabebehälter, insbesondere für Dickstoffpumpen
GB2443196A (en) 2006-10-27 2008-04-30 Clarke Uk Ltd Method of assembling a dual cylinder positive displacement drill cuttings pump
DE102013208101A1 (de) 2013-05-03 2014-11-20 Putzmeister Engineering Gmbh Behälter zur Aufnahme von Dickstoffen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989010486A1 (fr) * 1988-04-23 1989-11-02 Putzmeister-Werk Maschinenfabrik Gmbh Recipient d'alimentation pour pompes a liquides epais

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DE102020133022A1 (de) 2022-06-15
EP4012178A1 (fr) 2022-06-15

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