EP0925450B1 - Pump for thick substances - Google Patents

Pump for thick substances Download PDF

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Publication number
EP0925450B1
EP0925450B1 EP97936648A EP97936648A EP0925450B1 EP 0925450 B1 EP0925450 B1 EP 0925450B1 EP 97936648 A EP97936648 A EP 97936648A EP 97936648 A EP97936648 A EP 97936648A EP 0925450 B1 EP0925450 B1 EP 0925450B1
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EP
European Patent Office
Prior art keywords
container
thick matter
feed
matter pump
rib
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.)
Expired - Lifetime
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EP97936648A
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German (de)
French (fr)
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EP0925450A1 (en
Inventor
Hans Renz
Hellmut Hurr
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Putzmeister Concrete Pumps GmbH
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Putzmeister AG
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Publication of EP0925450A1 publication Critical patent/EP0925450A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0019Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers
    • F04B7/0034Piston 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

Definitions

  • the material being conveyed is during the backward stroke of the piston of the one feed cylinder from the material feed container into this cylinder sucked in while at the same time forward stroke the piston of the other delivery cylinder, the conveyed goods previously sucked into this through the swivel tube is pressed into the delivery line.
  • the wear ring arranged on the swivel tube that the swivel tube at the respective pressure stroke of a delivery cylinder tight against the front Spectacle-shaped openings delimiting openings of the delivery cylinders Wear plate is present to prevent Liquid or fine-grained components of the conveyed material can exit the material to be conveyed at this point.
  • the invention has for its object the known Thick matter pump of the type specified above to improve that a reliable seal between Swivel tube and delivery cylinders guaranteed during the pressure stroke is.
  • the invention proposes that the clearing rib on the wear ring the end facing away from the swivel tube a wear plate aligned vertically to the swivel axis bears against one on a conveyor tube side Container wall arranged and preferably adjustable axially parallel to this container wall Wear bar is present.
  • the wear plate is appropriately arranged at the level of the wear ring, while the swivel tube in a pivot bearing Back wall is axially slidably mounted.
  • the wear plate and form the associated wear strip a support bearing that has an axial limit in the area of the swivel tube pivot bearing, and that ensures that there is no pressure stroke on the axle shaft Attack tensile and bending forces.
  • Wear trap a simple and convenient readjustment of the swivel tube inside the material feed container without additional assembly work in the area of the switching mechanism possible.
  • the clearing rib is useful through in the two Swinging directions, mirror-symmetrical to one containing the swivel axis and the wear ring axis Radial plane arranged broad side surfaces limited. So that the material to be conveyed is on the ground lifted from the bottom of the container each time it switches over be mixed with the material above can, are according to a preferred embodiment of the invention, the broad side surfaces of the clearing rib free rib edge on the bottom with enlargement the rib wall thickness on opposite sides preferably curved outward by about 90 °.
  • the material feed container can be a easy to manufacture, concentric to the swivel axis have partially cylindrical bottom, while the container bottom facing rib edge also one for Pivot axis essentially coaxial, partially cylindrical can have convex curvature.
  • Two-cylinder thick matter pump is for use in stationary and mobile concrete pumps.
  • she consists consisting essentially of two delivery cylinders 10 pushing piston, not shown, a material feed container 14 and an in the material feed container 14 engaging S-shaped Swivel tube 16, which with a reversing mechanism 18th can be actuated.
  • the feed cylinder 10 are in the lower Area via openings 22 on the rear wall 24 of the material feed container 14 connected, the openings 22 on the inside of the material feed container 14 through an eyeglass-shaped wear plate 26 are limited.
  • the swivel tube 16 lies with its one a wear ring 28 bearing end against the Wear plate 26 and is by the reversing mechanism 18 depending on the direction of movement the delivery piston in the delivery cylinders 10 in front of one or other opening 22 pivoted. That way with the feed piston moved back, material from the material feed container 14 through the opening 22 in the concerned Feed cylinder 10 sucked in while over the other delivery piston material through the swivel tube 16 into an outside of the material feed container 14 located conveyor pipe 30 is transported.
  • the delivery pipe 30 can be connected to a delivery line, not shown of a concrete placing boom.
  • Fig. 1 that is essentially S-shaped swivel tube its end 32 opposite the wear ring 28 via a container-fixed, coaxial to its pivot axis 34
  • Pipe rotary connection 36 connected to the delivery pipe 30, while in the embodiment shown with FIG. 2 the end 32 of the swivel tube on the conveyor tube side by a simple rotary union 38 in the relevant container wall 40 is passed. in the latter case is an external pivot bearing with an additional pipe slewing ring required.
  • the container wall 40 is from the material feed container in both cases removable for assembly and disassembly purposes.
  • the swivel tube engages in the area of the rear wall 24 an axle shaft 42 designed as a drive shaft by a pivot bearing 44 of the material feed container 14 therethrough.
  • the axle shaft 42 is on the outside of the Material feed container 14 by the reversing mechanism 18 about the pivot axis 34 in the direction of the double arrow 46 (Fig. 3) pivoted back and forth. How 3 is the bottom 48 of the material feed container 14 along its entire length Pivot axis 34 is curved concentrically in a partially cylindrical manner.
  • Dead spaces within the material feed container 14 To avoid as much as possible is on the swivel tube 16 downward facing, almost the whole Swing tube length extending and close to the Container bottom 48 reaching broach 50 formed, the by mirror symmetry pointing in the two swivel directions to the pivot axis 34 and the Radial plane 54 containing wear ring axis 52 Broad side surfaces 56 is limited.
  • the Broad side surfaces 56 are for free bottom side Rib edge 58 towards increasing the thickness of the rib edge on the opposite sides concave to the outside curved and ensure that the material to be conveyed near the ground Range moved upwards with each switchover becomes.
  • the rib edge facing the container bottom 48 58 points in the embodiment shown a partially cylindrical convex to the pivot axis 34 Curvature so that between the bottom of the container and only a narrow gap 60 remains on the rib edge.
  • the end face On the locking ring 28 facing away from the swivel tube the end face carries the clearing rib 50 also a vertically aligned with the pivot axis 34, arranged at the level of the wear ring 28 wear plate 62, against one on the container wall 40 arranged and adjustable with respect to this axially parallel Wear bar 64 is present.
  • the wear bar is arranged on an adjuster for this purpose, which is guided in an opening 66 in the container wall 40, sealed against this and with a Adjustment mechanism arranged on the outside on the container wall 40 68 is displaceable.
  • the wear bar 64 serves the pivot tube as a support bearing, the one Axial limitation in the area of the swivel tube bearing dispensable and a tensile and bending stress the axle shaft 42 avoids. Besides, with these measures a simple adjustment of the swivel tube in the In the event of wear in the area of the wear ring 28 and the spectacle-shaped wear plate 26 possible.
  • the invention relates to a thick matter pump especially for promotion of concrete.
  • the thick matter pump has a material feed container 14, two with their front Openings 22 into the interior of the material feed container 14 discharge cylinder 10 and one in the material feed container 14 engaging, with one end cyclically alternating with the front openings 22 of the feed cylinder 10 communicating and with his other end 32 connected to a conveyor pipe 30 S-shaped swivel tube on.
  • the swivel tube is over one concentric to its end 32 on the conveyor tube side, horizontal arranged above the feed cylinder 10 Pivot axis 34 can be pivoted.

Description

Die Erfindung betrifft eine Dickstoffpumpe mit einem Materialaufgabebehälter, zwei mit ihren stirnseitigen Öffnungen in das Innere des Materialaufgabebehälters mündenden Förderzylindern und einem in den Materialaufgabebehälter eingreifenden, mit seinem einen, einen axial verschiebbaren Verschleißring tragenden Ende taktweise abwechselnd mit den stirnseitigen Öffnungen der Förderzylinder kommunizierenden und mit seinem anderen Ende an ein Förderrohr angeschlossenen S-förmigen Schwenkrohr, das um eine zum förderrohrseitigen Ende konzentrische, oberhalb der Förderzylinder angeordnete horizontale Achse verschwenkbar ist, wobei an dem Schwenkrohr eine nach unten weisende, sich im wesentlichen über die Schwenkrohrlänge erstreckende und bis in die Nähe des Behälterbodens reichende Räumrippe angeformt ist. Solche Dickstoffpumpe ist zum Beispiel aus dem Dokument US-A-3 963 385 bekannt.The invention relates to a thick matter pump with a Material feed container, two with their front Openings in the interior of the material feed container opening delivery cylinders and one in the material feed container engaging, with his one, one axially displaceable wear ring bearing end cyclically alternating with the front openings the feed cylinder communicating and with its other S-shaped end connected to a delivery pipe Swivel tube that goes around one end of the conveyor tube concentric, arranged above the feed cylinder horizontal axis is pivotable, on which Swivel tube is a downward facing, essentially extending over the swivel tube length and up Räumrippe formed in the vicinity of the container bottom is. Such thick matter pump is, for example, out document US-A-3 963 385.

Bei Dickstoffpumpen dieser Art wird das Fördergut während des Rückwärtshubs des Kolbens des einen Förderzylinders aus dem Materialaufgabebehälter in diesen Zylinder eingesaugt, während bei dem gleichzeitigen Vorwärtshub des Kolbens des anderen Förderzylinders, das zuvor in diesen eingesaugte Fördergut durch das Schwenkrohr hindurch in die Förderleitung gepreßt wird. Der auf dem Schwenkrohr angeordnete Verschleißring sorgt dafür, daß das Schwenkrohr bei dem jeweiligen Druckhub eines Förderzylinders dicht gegen eine die stirnseitigen Öffnungen der Förderzylinder begrenzende brillenförmige Verschleißplatte anliegt, um zu verhindern, daß Flüssigkeit oder feinkörnige Bestandteile des Förderguts an dieser Stelle aus dem Fördergut austreten können. Der Verschleißring ist zu diesem Zweck so konstruiert, daß er unter der Einwirkung des Förderdrucks beim Druckhub gegen die Verschleißplatte gepreßt wird. Aufgrund des beim Umschalten des Schwenkrohrs am Verschleißring und an der brillenförmigen Verschleißplatte auftretenden Verschleißes muß das Schwenkrohr von Zeit zu Zeit durch axiales Verschieben innerhalb des Materialaufgabebehälters nachgestellt werden. Hierzu ist im Bereich des Schwenkrohrlagers eine von außen zugängliche Verstellschraube angeordnet. Aufgrund der S-förmigen Krümmung des Schwenkrohrs sind je nach Konstruktion innerhalb des Materialaufgabebehälters mehr oder weniger große Toträume vorhanden, in denen sich Dickstoffmaterial ansammeln kann. Es ist deshalb wichtig, daß nach Abschluß eines jeden Pumpvorgangs der Materialaufgabebehälter entleert und gründlich gereinigt wird. Um die Toträume klein zu halten, wurde bereits vorgeschlagen, den Materialaufgabebehälter vor allem im Bodenbereich an den S-förmigen Verlauf des Schwenkrohrs anzupassen. Dies erfordert jedoch einen erheblichen baulichen Aufwand.In the case of thick matter pumps of this type, the material being conveyed is during the backward stroke of the piston of the one feed cylinder from the material feed container into this cylinder sucked in while at the same time forward stroke the piston of the other delivery cylinder, the conveyed goods previously sucked into this through the swivel tube is pressed into the delivery line. The wear ring arranged on the swivel tube that the swivel tube at the respective pressure stroke of a delivery cylinder tight against the front Spectacle-shaped openings delimiting openings of the delivery cylinders Wear plate is present to prevent Liquid or fine-grained components of the conveyed material can exit the material to be conveyed at this point. The wear ring is designed for this purpose that under the influence of the delivery pressure at Pressure stroke is pressed against the wear plate. by virtue of when switching the swivel tube on the wear ring and on the glasses-shaped wear plate The swivel tube must wear from time to time at times by moving axially within the material feed container be adjusted. For this is in Area of the swivel tube bearing an externally accessible Adjustment screw arranged. Because of the S-shaped The curvature of the swivel tube depends on the construction within the material feed container more or less large dead spaces exist in which thick material is found can accumulate. It is therefore important that after the completion of each pumping process, the material feed container is emptied and cleaned thoroughly. In order to keep the dead spaces small, it has already been proposed the material feed container, especially in the floor area to the S-shaped course of the swivel tube adapt. However, this requires a considerable amount construction effort.

Um diesen Nachteil zu vermeiden, wurde bereits die am Schwenkrohr angeformte, bis in die Nähe des Behälterbodens reichende Räumrippe vorgeschlagen. Damit wird erreicht, daß auch bei einem verhältnismäßig einfach konstruierten Materialaufgabebehälter keine großen Toträume auftreten können, in denen sich unbewegtes Fördergut ansammeln kann.In order to avoid this disadvantage, the am Molded swivel tube, close to the bottom of the container reaching clearing rib proposed. So that is achieved that even with a relatively simple construction Material feed container no large dead spaces can occur in which there is still material to be conveyed can accumulate.

Der Erfindung liegt die Aufgabe zugrunde, die bekannte Dickstoffpumpe der eingangs angegebenen Art dahingehend zu verbessern, daß eine zuverlässige Abdichtung zwischen Schwenkrohr und Förderzylindern beim Druckhub gewährleistet ist.The invention has for its object the known Thick matter pump of the type specified above to improve that a reliable seal between Swivel tube and delivery cylinders guaranteed during the pressure stroke is.

Zur Lösung dieser Aufgabe wird gemäß der Erfindung vorgeschlagen, daß die Räumrippe an ihrem dem Verschleißring des Schwenkrohrs abgewandten stirnseitigen Ende eine zur Schwenkachse vertikal ausgerichtete Verschleißplatte trägt, die gegen eine an einer förderrohrseitigen Behälterwand angeordnete und vorzugsweise gegenüber dieser Behälterwand achsparallel verstellbare Verschleißleiste anliegt. Die Verschleißplatte ist hierzu zweckmäßig auf der Höhe des Verschleißring angeordnet, während das Schwenkrohr in einem Drehlager der Rückwand axial verschiebbar gelagert ist. Die Verschleißplatte und die zugehörige Verschleißleiste bilden ein Stützlager, das eine Axialbegrenzung im Bereich des Schwenkrohr-Drehlagers entbehrlich macht, und das sicherstellt, daß beim Druckhub an der Achswelle keine Zug- und Biegekräfte angreifen. Weiter ist damit im Verschleißfalle eine einfache und bequeme Nachstellung des Schwenkrohrs innerhalb des Materialaufgabebehälters ohne zusätzlichen Montageaufwand im Bereich des Umschaltmechanismus möglich.To achieve this object, the invention proposes that the clearing rib on the wear ring the end facing away from the swivel tube a wear plate aligned vertically to the swivel axis bears against one on a conveyor tube side Container wall arranged and preferably adjustable axially parallel to this container wall Wear bar is present. The wear plate is appropriately arranged at the level of the wear ring, while the swivel tube in a pivot bearing Back wall is axially slidably mounted. The wear plate and form the associated wear strip a support bearing that has an axial limit in the area of the swivel tube pivot bearing, and that ensures that there is no pressure stroke on the axle shaft Attack tensile and bending forces. Next is in Wear trap a simple and convenient readjustment of the swivel tube inside the material feed container without additional assembly work in the area of the switching mechanism possible.

Eine weitere Verbesserung in dieser Hinsicht wird dadurch erzielt, daß die Verschleißleiste an einem in einem Durchbruch der förderrohrseitigen Behälterwand angeordneten, gegenüber diesem abgedichteten und mit einem außenseitig an der Behälterwand angeordneten Verstellmechanismus verschiebbaren Nachstellbalken angeordnet ist.This will further improve this achieved that the wear bar on one in one Breakthrough of the container wall on the conveyor pipe side, sealed against this and with a Adjustment mechanism arranged on the outside of the container wall slidable adjuster bar arranged is.

Die Räumrippe ist zweckmäßig durch in die beiden Schwenkrichtungen weisende, spiegelsymmetrisch zu einer die Schwenkachse und die Verschleißringachse enthaltenden Radialebene angeordnete Breitseitenflächen begrenzt. Damit das am Boden befindliche Fördergut bei jedem Umschaltvorgang vom Behälterboden abgehoben und mit dem darüber befindlichen Fördergut durchmischt werden kann, sind gemäß einer bevorzugten Ausgestaltung der Erfindung die Breitseitenflächen der Räumrippe zum freien bodenseitigen Rippenrand hin unter Vergrößerung der Rippenwandstärke nach entgegengesetzen Seiten vorzugsweise um etwa 90° konkav nach außen gekrümmt. Der Materialaufgabebehälter kann in diesem Fall einen leicht herstellbaren, zur Schwenkachse konzentrischen teilzylindrischen Boden aufweisen, während der dem Behälterboden zugewandte Rippenrand ebenfalls eine zur Schwenkachse im wesentlichen koaxiale, teilzylindrisch konvexe Krümmung aufweisen kann.The clearing rib is useful through in the two Swinging directions, mirror-symmetrical to one containing the swivel axis and the wear ring axis Radial plane arranged broad side surfaces limited. So that the material to be conveyed is on the ground lifted from the bottom of the container each time it switches over be mixed with the material above can, are according to a preferred embodiment of the invention, the broad side surfaces of the clearing rib free rib edge on the bottom with enlargement the rib wall thickness on opposite sides preferably curved outward by about 90 °. The In this case, the material feed container can be a easy to manufacture, concentric to the swivel axis have partially cylindrical bottom, while the container bottom facing rib edge also one for Pivot axis essentially coaxial, partially cylindrical can have convex curvature.

Die einfache konstruktive Gestaltung des Materialaufgabebehälters mit teilzylindrischem Boden ermöglicht es, daß die förderrohrseitige Behälterwand mit dem Materialaufgabebehälter lösbar verbunden und daher zu Montage- und Demontagezwecken einfach abnehmbar ist. The simple constructive design of the material feed container with partially cylindrical bottom it that the conveyor tube-side container wall with the material feed container releasably connected and therefore too Assembly and disassembly purposes is easily removable.

Im folgenden wird die Erfindung anhand der Zeichnung näher erläutert. Es zeigen:

Fig. 1
einen Schnitt durch den Materialaufgabebehälter einer Zweizylinder-Dickstoffpumpe mit Sförmigem Schwenkrohr;
Fig. 2
ein abgewandeltes Ausführungsbeispiel eines Materialaufgabebehälters mit S-Rohr in einer Schnittdarstellung entsprechend Fig. 1;
Fig. 3
einen Schnitt entlang der Schnittlinie III-III der Fig. 1.
The invention is explained in more detail below with reference to the drawing. Show it:
Fig. 1
a section through the material feed container of a two-cylinder thick matter pump with S-shaped swivel tube;
Fig. 2
a modified embodiment of a material feed container with an S-tube in a sectional view corresponding to FIG. 1;
Fig. 3
a section along the section line III-III of Fig. 1st

Die in der Zeichnung ausschnittsweise dargestellte Zweizylinder-Dickstoffpumpe ist für den Einsatz in stationären und fahrbaren Betonpumpen bestimmt. Sie besteht im wesentlichen aus zwei Förderzylindern 10 mit im Gegentakt angetriebenen, nicht dargestellten Förderkolben, einem Materialaufgabebehälter 14 und einem in den Materialaufgabebehälter 14 eingreifenden S-förmigen Schwenkrohr 16, der mit einem Umsteuermechanismus 18 betätigbar ist. Die Förderzylinder 10 sind im unteren Bereich über Öffnungen 22 an die Rückwand 24 des Materialaufgabebehälters 14 angeschlossen, wobei die Öffnungen 22 auf der Innenseite des Materialaufgabebehälters 14 durch eine brillenförmige Verschleißplatte 26 begrenzt sind. Das Schwenkrohr 16 liegt mit seinem einen, einen Verschleißring 28 tragenden Ende gegen die Verschleißplatte 26 an und wird durch den Umsteuermechanismus 18 in Abhängigkeit von der Bewegungsrichtung der Förderkolben in den Förderzylindern 10 vor die eine oder andere Öffnung 22 geschwenkt. Auf diese Weise wird bei zurückbewegtem Förderkolben Material aus dem Materialaufgabebehälter 14 durch die Öffnung 22 in den betreffenden Förderzylinder 10 angesaugt, während über den anderen Förderkolben Material durch das Schwenkrohr 16 hindurch in ein außerhalb des Materialaufgabebehälters 14 befindliches Förderrohr 30 transportiert wird. Das Förderrohr 30 kann an eine nicht dargestellte Förderleitung eines Betonverteilermasts angeschlossen werden.The part shown in the drawing Two-cylinder thick matter pump is for use in stationary and mobile concrete pumps. she consists consisting essentially of two delivery cylinders 10 pushing piston, not shown, a material feed container 14 and an in the material feed container 14 engaging S-shaped Swivel tube 16, which with a reversing mechanism 18th can be actuated. The feed cylinder 10 are in the lower Area via openings 22 on the rear wall 24 of the material feed container 14 connected, the openings 22 on the inside of the material feed container 14 through an eyeglass-shaped wear plate 26 are limited. The swivel tube 16 lies with its one a wear ring 28 bearing end against the Wear plate 26 and is by the reversing mechanism 18 depending on the direction of movement the delivery piston in the delivery cylinders 10 in front of one or other opening 22 pivoted. That way with the feed piston moved back, material from the material feed container 14 through the opening 22 in the concerned Feed cylinder 10 sucked in while over the other delivery piston material through the swivel tube 16 into an outside of the material feed container 14 located conveyor pipe 30 is transported. The delivery pipe 30 can be connected to a delivery line, not shown of a concrete placing boom.

Bei dem in Fig. 1 gezeigten Ausführungsbeispiel ist das im wesentlichen S-förmig ausgebildete Schwenkrohr an seinem dem Verschleißring 28 gegenüberliegenden Ende 32 über eine behälterfeste, zu seiner Schwenkachse 34 koaxiale Rohrdrehverbindung 36 mit dem Förderrohr 30 verbunden, während bei den mit Fig. 2 gezeigten Ausführungsbeispiel das förderrohrseitige Ende 32 des Schwenkrohrs durch eine einfache Drehdurchführung 38 in der betreffenden Behälterwand 40 hindurchgeführt ist. Im letzteren Falle ist ein außenliegendes Drehlager ggf. mit einer zusätzlichen Rohrdrehverbindung erforderlich. Die Behälterwand 40 ist in beiden Fällen vom Materialaufgabebehälter zu Montage- und Demontagezwecken abnehmbar.In the embodiment shown in Fig. 1 that is essentially S-shaped swivel tube its end 32 opposite the wear ring 28 via a container-fixed, coaxial to its pivot axis 34 Pipe rotary connection 36 connected to the delivery pipe 30, while in the embodiment shown with FIG. 2 the end 32 of the swivel tube on the conveyor tube side by a simple rotary union 38 in the relevant container wall 40 is passed. in the the latter case is an external pivot bearing with an additional pipe slewing ring required. The container wall 40 is from the material feed container in both cases removable for assembly and disassembly purposes.

Im Bereich der Rückwand 24 greift das Schwenkrohr mit einer als Antriebswelle ausgebildeten Achswelle 42 durch ein Drehlager 44 des Materialaufgabebehälters 14 hindurch. Die Achswelle 42 wird auf der Außenseite des Materialaufgabebehälters 14 durch den Umsteuermechanismus 18 um die Schwenkachse 34 in Richtung des Doppelpfeils 46 (Fig. 3) begrenzt hin- und hergeschwenkt. Wie aus Fig. 3 zu ersehen ist, ist der Boden 48 des Materialaufgabebehälters 14 über seine ganze Länge zur Schwenkachse 34 konzentrisch teilzylindrisch gekrümmt. Um Toträume innerhalb des Materialaufgabebehälters 14 weitgehend zu vermeiden, ist an dem Schwenkrohr 16 eine nach unten weisende, sich annähernd über die gesamte Schwenkrohrlänge erstreckende und bis in die Nähe des Behälterbodens 48 reichende Räumrippe 50 angeformt, die durch in die beiden Schwenkrichtungen weisende, spiegelsymmetrisch zu einer die Schwenkachse 34 und die Verschleißringachse 52 enthaltenden Radialebene 54 angeordnete Breitseitenflächen 56 begrenzt ist. Die Breitseitenflächen 56 sind zum freien bodenseitigen Rippenrand 58 hin unter Vergrößerung der Rippenrandstärke nach entgegengesetzten Seiten konkav nach außen gekrümmt und sorgen dafür, daß das Fördergut im bodennahen Bereich bei jedem Umschaltvorgang nach oben aufgerührt wird. Der dem Behälterboden 48 zugewandte Rippenrand 58 weist bei dem gezeigten Ausführungsbeispiel eine zur Schwenkachse 34 koaxiale teilzylindrisch konvexe Krümmung auf, so daß zwischen dem Behälterboden und dem Rippenrand nur ein schmaler Spalt 60 verbleibt.The swivel tube engages in the area of the rear wall 24 an axle shaft 42 designed as a drive shaft by a pivot bearing 44 of the material feed container 14 therethrough. The axle shaft 42 is on the outside of the Material feed container 14 by the reversing mechanism 18 about the pivot axis 34 in the direction of the double arrow 46 (Fig. 3) pivoted back and forth. How 3 is the bottom 48 of the material feed container 14 along its entire length Pivot axis 34 is curved concentrically in a partially cylindrical manner. Dead spaces within the material feed container 14 To avoid as much as possible is on the swivel tube 16 downward facing, almost the whole Swing tube length extending and close to the Container bottom 48 reaching broach 50 formed, the by mirror symmetry pointing in the two swivel directions to the pivot axis 34 and the Radial plane 54 containing wear ring axis 52 Broad side surfaces 56 is limited. The Broad side surfaces 56 are for free bottom side Rib edge 58 towards increasing the thickness of the rib edge on the opposite sides concave to the outside curved and ensure that the material to be conveyed near the ground Range moved upwards with each switchover becomes. The rib edge facing the container bottom 48 58 points in the embodiment shown a partially cylindrical convex to the pivot axis 34 Curvature so that between the bottom of the container and only a narrow gap 60 remains on the rib edge.

An ihrem dem Verschließring 28 des Schwenkrohrs abgewandten stirnseitigen Ende trägt die Räumrippe 50 außerdem eine zur Schwenkachse 34 vertikal ausgerichtete, auf der Höhe des Verschleißrings 28 angeordnete Verschleißplatte 62, die gegen eine an der Behälterwand 40 angeordnete und gegenüber dieser achsparallel verstellbare Verschleißleiste 64 anliegt. Die Verschleißleiste ist zu diesem Zweck an einem Nachstellbalken angeordnet, der in einem Durchbruch 66 der Behälterwand 40 geführt, gegenüber diesem abgedichteten und mit einem außenseitig an der Behälterwand 40 angeordneten Verstellmechanismus 68 verschiebbar ist. Die Verschleißleiste 64 dient dem Schwenkrohr als Stützlager, das eine Axialbegrenzung im Bereich des Schwenkrohrlagers entbehrlich macht und eine Zug- und Biegebeanspruchung der Achswelle 42 meidet. Außerdem ist mit diesen Maßnahmen eine einfache Nachstellung des Schwenkrohrs im Falle eines Verschleißes im Bereich des Verschleißrings 28 und der brillenförmigen Verscheißplatte 26 möglich.On the locking ring 28 facing away from the swivel tube the end face carries the clearing rib 50 also a vertically aligned with the pivot axis 34, arranged at the level of the wear ring 28 wear plate 62, against one on the container wall 40 arranged and adjustable with respect to this axially parallel Wear bar 64 is present. The wear bar is arranged on an adjuster for this purpose, which is guided in an opening 66 in the container wall 40, sealed against this and with a Adjustment mechanism arranged on the outside on the container wall 40 68 is displaceable. The wear bar 64 serves the pivot tube as a support bearing, the one Axial limitation in the area of the swivel tube bearing dispensable and a tensile and bending stress the axle shaft 42 avoids. Besides, with these measures a simple adjustment of the swivel tube in the In the event of wear in the area of the wear ring 28 and the spectacle-shaped wear plate 26 possible.

Zusammenfassend ist folgendes festzustellen: Die Erfindung betrifft eine Dickstoffpumpe insbesondere zur Förderung von Beton. Die Dickstoffpumpe weist einen Materialaufgabebehälter 14, zwei mit ihren stirnseitigen Öffnungen 22 in das Innere des Materialaufgabebehälters 14 mündende Förderzylinder 10 und ein in den Materialaufgabebehälter 14 eingreifendes, mit seinem einen Ende taktweise abwechselnd mit den stirnseitigen Öffnungen 22 der Förderzylinder 10 kommunizierendes und mit seinem anderen Ende 32 an ein Förderrohr 30 angeschlossenes S-förmiges Schwenkrohr auf. Das Schwenkrohr ist um eine zu seinem förderrohrseitigen Ende 32 konzentrische, oberhalb der Förderzylinder 10 angeordnete horizontale Schwenkachse 34 verschwenkbar. An dem Schwenkrohr ist eine sich im wesentlichen über die Schwenkrohrlänge erstreckende und bis in die Nähe des Behälterbodens 38 reichende Räumrippe 50 angeformt. Die Räumrippe weist an ihrem den Förderzylindern 10 abgewandten Ende eine zur Schwenkachse 34 senkrecht ausgerichtete Verschleißplatte 62 auf, die gegen eine an einer förderrohrseitigen Behälterwand 40 angeordnete, gegen dieser achsparallel verstellbare Verschleißleiste 64 anliegt.In summary, the following can be stated: The invention relates to a thick matter pump especially for promotion of concrete. The thick matter pump has a material feed container 14, two with their front Openings 22 into the interior of the material feed container 14 discharge cylinder 10 and one in the material feed container 14 engaging, with one end cyclically alternating with the front openings 22 of the feed cylinder 10 communicating and with his other end 32 connected to a conveyor pipe 30 S-shaped swivel tube on. The swivel tube is over one concentric to its end 32 on the conveyor tube side, horizontal arranged above the feed cylinder 10 Pivot axis 34 can be pivoted. On the swivel tube is an essentially the length of the swivel tube extending and close to the bottom of the container 38 reaching broach 50 molded. The Broaching rib points at its facing away from the feed cylinders 10 End one aligned perpendicular to the pivot axis 34 Wear plate 62 on one against one Conveyor tube-side container wall 40 arranged against this axially adjustable wear bar 64 is present.

Claims (10)

  1. A thick matter pump comprising a material feed container (14), two feed cylinders (10) which open into the interior of the material feed container with their respective end-face openings (22), and an S-shaped swing pipe which extends into the material feed container (14) and whose one end, which preferably carries an axially moveable wear ring (28), alternatingly communicates with the end-face openings (22) of the feed cylinders (10) and whose other end (32) is connected to a feed pipe (30), the swing pipe being adapted to pivot about a horizontal pivot axis (34) which is concentric to its feed pipe-sided end (32) and disposed above the feed cylinders (10), wherein a clearing rib (50) is integrally formed to the swing pipe (16), which clearing rib is oriented downwardly, extends substantially along the length of the swing pipe, and reaches to the vicinity of the container base (48), characterized in that the clearing rib (50) comprises at its face end remote from the wear ring (28) of the swing pipe (16) a wear plate (62) which is aligned perpendicularly to the pivot axis (34) and which abuts a wear strip (64) disposed on a container wall (40) on the feed pipe side.
  2. The thick matter pump of claim 1, characterized in that the clearing rib (50) is delimited by areas (56) at its broad side which face both pivot directions and which are disposed symmetrically to a radial plane (54) which contains the pivot axis (34) and the wear ring axis (52).
  3. The thick matter pump of claim 2, characterized in that the broad side areas (56) of the clearing rib (50) are concavely curved outward in opposing directions, preferably by approximately 90°, toward the free rib edge at the base side such that the rib wall thickness is increased.
  4. The thick matter pump of one of claims 1 to 3, characterized in that the material feed container (14) comprises a partial cylindrically-shaped container base (48) which is concentric to the pivot axis (34).
  5. The thick matter pump of claim 3 or 4, characterized in that the rib edge (58) facing the container base (48) comprises a partial cylindrically convex curvature which is substantially coaxial to the pivot axis (34).
  6. The thick matter pump of one of claims 1 to 5, characterized in that the wear strip (64) is adapted to be adjusted axially parallel with respect to the container wall (40) at the feed pipe side.
  7. The thick matter pump of claim 6, characterized in that the wear plate (62) is disposed at the height of the wear ring (28).
  8. The thick matter pump of claim 6 or 7, characterized in that the wear strip (64) is disposed on an adjusting bar which is disposed in an opening (66) in the feed pipe side container wall (40) and sealed with respect thereto, and which is adapted to be displaced by means of an adjusting mechanism (68) disposed on the outside of the corresponding container wall (40).
  9. The thick matter pump of one of claims 1 to 8, characterized in that the swing pipe (16) is adapted to be axially displaced in a rotational feed-through (38) or rotational bearing in the feed pipe side container wall (40).
  10. The thick matter pump of one of claims 1 to 9, characterized in that the feed pipe side container wall (40) is adapted to be removed from the material feed container (14).
EP97936648A 1996-09-14 1997-07-22 Pump for thick substances Expired - Lifetime EP0925450B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19637560 1996-09-14
DE19637560 1996-09-14
PCT/EP1997/003948 WO1998011346A1 (en) 1996-09-14 1997-07-22 Pump for thick substances

Publications (2)

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EP0925450A1 EP0925450A1 (en) 1999-06-30
EP0925450B1 true EP0925450B1 (en) 2002-04-17

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EP97936648A Expired - Lifetime EP0925450B1 (en) 1996-09-14 1997-07-22 Pump for thick substances

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EP (1) EP0925450B1 (en)
JP (1) JP2001508516A (en)
DE (2) DE19731335A1 (en)
WO (1) WO1998011346A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10155787A1 (en) * 2001-11-14 2003-05-22 Putzmeister Ag Material feed container for two-cylinder thick matter pumps
DE10342338A1 (en) * 2003-09-11 2005-05-25 Putzmeister Ag Slider device for a slurry pump and wear strip therefor
GB2416569A (en) 2004-07-27 2006-02-01 Clarke Uk Ltd Method of and a pump for pumping drill cuttings
DE102007037148B4 (en) 2007-08-07 2011-04-21 Krüger, Holger Wear body for a concrete pump and method for producing a wear body for a concrete pump
CN103216439B (en) * 2013-04-03 2015-12-23 三一重工股份有限公司 The dynamic sealing assembly of pumping mechanism, the detection system of this dynamic sealing assembly and detecting method
DE102022112508A1 (en) 2022-05-18 2023-11-23 Schwing Gmbh Pipe diverter housing for a thick matter pump and a thick matter pump

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963385A (en) * 1975-05-05 1976-06-15 Caban Angel M Valve assembly for concrete pumps
DE2632816C2 (en) * 1976-07-21 1982-07-29 Friedrich Wilh. Schwing Gmbh, 4690 Herne Sealing device for a double cylinder pump, especially for pumping concrete
DE3122825C2 (en) * 1981-06-09 1984-11-08 Maschinenfabrik Walter Scheele GmbH & Co KG, 4750 Unna-Massen Device for conveying pasty masses, in particular concrete
DE59504991D1 (en) * 1994-04-28 1999-03-11 Putzmeister Ag FUEL PUMP

Also Published As

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JP2001508516A (en) 2001-06-26
WO1998011346A1 (en) 1998-03-19
EP0925450A1 (en) 1999-06-30
DE59707070D1 (en) 2002-05-23
DE19731335A1 (en) 1998-03-19

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