EP0805273A2 - Thick matter pump - Google Patents

Thick matter pump Download PDF

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Publication number
EP0805273A2
EP0805273A2 EP97111499A EP97111499A EP0805273A2 EP 0805273 A2 EP0805273 A2 EP 0805273A2 EP 97111499 A EP97111499 A EP 97111499A EP 97111499 A EP97111499 A EP 97111499A EP 0805273 A2 EP0805273 A2 EP 0805273A2
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EP
European Patent Office
Prior art keywords
material feed
feed container
thick matter
tube
matter pump
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
EP97111499A
Other languages
German (de)
French (fr)
Other versions
EP0805273A3 (en
EP0805273B1 (en
Inventor
Klaus BÜHRER
Hellmut Hurr
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.)
Putzmeister Concrete Pumps GmbH
Original Assignee
Putzmeister AG
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
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Publication of EP0805273A2 publication Critical patent/EP0805273A2/en
Publication of EP0805273A3 publication Critical patent/EP0805273A3/en
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Publication of EP0805273B1 publication Critical patent/EP0805273B1/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/02—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated
    • F04B7/0233—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated a common distribution member forming a single discharge distributor for a plurality of pumping chambers
    • F04B7/0258—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated a common distribution member forming a single discharge distributor for a plurality of pumping chambers and having an orbital movement, e.g. elbow-pipe type members

Definitions

  • the invention relates to a thick matter pump with a material feed container, two hydraulically driven conveying cylinders opening with their front openings into the interior of the material feed container, an engaging in the material feed container, with one end alternating in cycles with the front openings of the feed cylinders and communicating with its other end a feed pipe connected swivel pipe.
  • Thick matter pumps of this type are mainly used for pumping concrete and more or less viscous sludge, which can solidify after a long standstill. Therefore, the pipes of the thick matter pump and the material feed container have to be emptied and cleaned at the end of a conveying process.
  • the delivery line which is usually attached to a placing boom in concrete pumps, can be emptied either by sucking back the concrete it contains into the material feed container through the thick matter pump itself or under pressure in the opposite direction with the help of a pressure medium, such as compressed air or water, pressed into the delivery line will.
  • the pipelines are wiped out by means of elastomeric sponge balls or cleaning bodies, which are either sucked over the free end of the delivery pipe or to the material feed container be pressed in the opposite direction using suitable pipeline fittings. Furthermore, it is known to provide closable cleaning openings in the pipeline wall in the region of the swivel tube, through which access into the interior of the pipeline is possible for cleaning purposes. The problem of emptying using the residual concrete in the material feed container has not yet been satisfactorily solved.
  • the invention has for its object to improve the known concrete pumps of the type mentioned in such a way that the material feed container can be almost completely emptied with simple means.
  • the end-of-the-line feed cylinder openings opening into the material feed container are at least partially coverable or closable against air access from the material feed container into the vicinity of the container bottom, preferably by means of a slide.
  • a preferred embodiment of the invention provides that a transport pipe is connected to the cleaning opening of the swivel pipe or delivery pipe, via which the material feed container can be emptied to a small remaining amount with the aid of the delivery cylinder.
  • a shut-off device closing the delivery pipe or the swivel pipe to the free end of the delivery pipe is provided.
  • the shut-off device can be designed, for example, as a gate valve, which is expediently arranged in the region of a connecting flange on the delivery pipe outside the material feed container.
  • the shut-off device can also be designed as a sealing body which can be pressed into the inside of the pipe against the conveyor pipe or swivel pipe, preferably deformable under the influence of pressure, which can be inserted into the delivery or swivel pipe from the cleaning cartridge and in this preferably by means of a limp, band-like or chain-like holding member is positionable.
  • a seat or support member for the sealing body which engages in the pipe interior, preferably from the cleaning opening, can be provided independently of the holding member or in addition thereto.
  • a preferred embodiment of the invention provides that the sealing body as expandable under the action of a pressure medium, preferably compressed air or pressure fluid, and against the inner surface of the tube or ball can be pressed.
  • the two-cylinder slurry pumps shown in the drawing are intended for use in stationary and mobile concrete pumps. They essentially consist of two delivery cylinders 10 with delivery pistons 12 driven hydraulically in push-pull, a material feed container 14 and a slide device 20 which engages with a swivel tube 16 in the material feed container 14 and can be actuated with a reversing mechanism 18.
  • the delivery cylinders 10 are in the lower region Connected via openings 22 to the rear wall 24 of the material feed container 14, the openings 22 on the inside of the material feed container 14 being delimited by an eyeglass-shaped wear plate 26.
  • the swivel tube 16 abuts with its one end, which carries a wear ring 28, against the wear plate 26 and is swiveled in front of one or the other opening 22 by the reversing mechanism 18 depending on the direction of movement of the delivery pistons 12 in the delivery cylinders 10.
  • the delivery pipe 42 can be connected to a delivery line, not shown, of a concrete placing boom.
  • the exemplary embodiments shown in FIGS. 1 and 2 differ primarily in the shape of the swivel tube 16.
  • the swivel tube is essentially S-shaped. It is connected at its end opposite the feed cylinders to the feed pipe 42 via a tubular pipe joint 43 which is fixed to the container and coaxial with its pivot axis, and engages on the other side with an axle shaft 45 designed as a drive shaft Pivot bearing 47 of the material feed container 14 therethrough.
  • the outwardly projecting stub shaft of the axle shaft 45 is rotatably connected to a reversing lever 46 of the reversing mechanism 18, which at its upward-facing end facing two opposite sides, designed as ball sockets 48 for the connection of a piston-side ball head 50 of the two drive cylinders 52 Reversing mechanism 18 has.
  • the drive cylinders 52 are supported with a further ball head 54 in a bearing point 56 which is fixed to the delivery cylinder and is designed as a ball socket.
  • a C-shaped swivel tube 16 is provided which engages in the material feed container 14 from above.
  • the swivel tube 16 is connected via a flange 40 to the delivery tube 42, which is designed as an extension tube and which in turn is connected to a delivery line of a concrete placing boom via an unillustrated tube rotary connection.
  • the flange 40 is detachably connected by means of two clamping screws 44 to the reversing lever 46 of the reversing mechanism 18, which has at its lower end two bearing points 48, which are designed as ball sockets, for the connection of one piston-side spherical head 50 each of the two drive cylinders 52 of the reversing mechanism 18 at its lower end .
  • the drive cylinders 52 are equipped with a further ball head 54, each in a delivery cylinder fixed Ball socket trained bearing 56 stored.
  • the drive cylinders 52 can be pressurized with pressure oil on one side and contain a plunger 60 that supports the ball head 50.
  • cleaning openings 80 are provided in the area of the tube walls of the swivel tube 16 (FIG. 2) and / or the delivery tube 42, which can be closed with a cover 82 and a coupling element 84.
  • an opening 72 On the underside of the material feed container 14 there is an opening 72 which can be closed with a swivel lid 70 and through which the material feed container 14 can be completely emptied.
  • the material feed container 14 can also be emptied via the concrete pump.
  • the cleaning opening 80 on the swivel tube 16 is equipped with a pressure hose 122 and the path to the delivery tube 42 is blocked by the balloon 98.
  • the slide 124 arranged in the area of the spectacle-shaped wear plate 26, which can be moved from top to bottom, ensures that only the lower area of the feed cylinder openings 22 to the material feed container 14 is open during suction, the material feed container can be almost completely emptied with these measures will. The remaining concrete then remaining can be removed via the opening 72.
  • the invention relates to a thick matter pump, in particular a concrete pump, with a material feed container 14, two conveying cylinders 10 opening with their end openings 22 into the interior of the material feed container 14, and one end intermittently engaging in the material feed container 14 alternately with the end openings 22 of the feed cylinder communicating and with its other end connected to a feed tube 42 and with a pivot tube 16 near the end of the feed tube 42 on the pivot tube side or in a section of the pivot tube 16 arranged outside the material feed container in the relevant tube wall Cleaning opening 80.
  • the end-side delivery cylinder openings 22 opening into the material feed container are at least partially up to the point of preventing air from entering the material feed container 14 he the bottom of the material feed container, preferably covered or connectable by means of a slide 122.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

Die Erfindung bezieht sich auf eine Dickstoffpumpe, insbesondere eine Betonpumpe, mit einem Materialaufgabebehälter (14), zwei mit ihren stirnseitigen Öffnungen (22) in das Innere des Materialaufgabebehälters (14) mündenden Förderzylindern (10), einem in den Materialaufgabebehälter (14) eingreifenden, mit seinem einen Ende taktweise abwechselnd mit den stirnseitigen Öffnungen (22) der Förderzylinder kommunizierenden und mit seinem anderen Ende an ein Förderrohr (42) angeschlossenen Schwenkrohr (16) und mit einer in der Nähe des schwenkrohrseitigen Endes des Förderrohrs (42) oder in einem außerhalb des Materialaufgabebehälters angeordneten Abschnitt des Schwenkrohrs (16) in der betreffenden Rohrwand angeordneten verschließbaren Reinigungsöffnung (80). Erfindungsgemäß sind die in den Materialaufgabebehälter mündenden stirnseitigen Förderzylinderöffnungen (22) gegen Luftzutritt aus dem Materialaufgabebehälter (14) zumindest teilweise bis in die Nähe des Materialaufgabebehälterbodens, vorzugsweise mittels eines Schiebers (122) abdeckbar oder anschließbar. <IMAGE>The invention relates to a thick matter pump, in particular a concrete pump, with a material feed container (14), two conveying cylinders (10) opening into the interior of the material feed container (14) with their front openings (22), and one that engages in the material feed container (14). with one end intermittently alternating with the front openings (22) of the delivery cylinder and communicating with the other end to a delivery pipe (42) connected to the delivery pipe (16) and with one near the delivery pipe side end of the delivery pipe (42) or in an outside of the material feed container arranged section of the swivel tube (16) in the relevant tube wall arranged closable cleaning opening (80). According to the invention, the front-side delivery cylinder openings (22) opening into the material feed container can be at least partially covered or connected against air access from the material feed container (14) up to the vicinity of the material feed container bottom, preferably by means of a slide (122). <IMAGE>

Description

Die Erfindung betrifft eine Dickstoffpumpe mit einem Materialaufgabebehälter, zwei mit ihren stirnseitigen Öffnungen in das Innere des Materialaufgabebehälters mündenden, hydraulisch angetriebenen Förderzylindern, einem in den Materialaufgabebehälter eingreifenden, mit seinem einen Ende taktweise abwechselnd mit den stirnseitigen Öffnungen der Förderzylinder kommunizierenden und mit seinem anderen Ende an ein Förderrohr angeschlossenen Schwenkrohr.The invention relates to a thick matter pump with a material feed container, two hydraulically driven conveying cylinders opening with their front openings into the interior of the material feed container, an engaging in the material feed container, with one end alternating in cycles with the front openings of the feed cylinders and communicating with its other end a feed pipe connected swivel pipe.

Dickstoffpumpen dieser Art werden vor allem zum Fördern von Beton und von mehr oder weniger dickflüssigen Schlämmen eingesetzt, die bei längerem Stillstand erstarren können. Deshalb müssen die Rohrleitungen der Dickstoffpumpe und der Materialaufgabebehälter am Ende eines Fördervorgangs entleert und gereinigt werden. Die Förderleitung, die bei Betonpumpen meist an einem Verteilermast befestigt ist, kann entweder durch Zurücksaugen des in ihr enthaltenen Betons in den Materialaufgabebehälter durch die Dickstoffpumpe selbst oder unter Druck in umgekehrter Richtung mit Hilfe eines in die Förderleitung eingepreßten Druckmittels, wie Druckluft oder Wasser, entleert werden. Das Auswischen der Rohrleitungen erfolgt mittels elastomerer Schwammkugeln oder Reinigungskörper, die entweder über das freie Förderrohrende zum Materialaufgabebehälter gesaugt oder über geeignete Rohrleitungsarmaturen in die entgegengesetzte Richtung gedrückt werden. Weiter ist es bekannt, im Bereich des Schwenkrohrs verschließbare Reinigungsöffnungen in der Rohrleitungswand vorzusehen, durch die hindurch zu Reinigungszwecken ein Zugriff in das Rohrleitungsinnere möglich ist. Noch nicht befriedigend gelöst ist bisher das Problem der Entleerung unter Verwertung des im Materialaufgabebehälter befindlichen Restbetons.Thick matter pumps of this type are mainly used for pumping concrete and more or less viscous sludge, which can solidify after a long standstill. Therefore, the pipes of the thick matter pump and the material feed container have to be emptied and cleaned at the end of a conveying process. The delivery line, which is usually attached to a placing boom in concrete pumps, can be emptied either by sucking back the concrete it contains into the material feed container through the thick matter pump itself or under pressure in the opposite direction with the help of a pressure medium, such as compressed air or water, pressed into the delivery line will. The pipelines are wiped out by means of elastomeric sponge balls or cleaning bodies, which are either sucked over the free end of the delivery pipe or to the material feed container be pressed in the opposite direction using suitable pipeline fittings. Furthermore, it is known to provide closable cleaning openings in the pipeline wall in the region of the swivel tube, through which access into the interior of the pipeline is possible for cleaning purposes. The problem of emptying using the residual concrete in the material feed container has not yet been satisfactorily solved.

Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, die bekannten Betonpumpen der eingangs angegebenen Art dahingehend zu verbessern, daß der Materialaufgabebehälter mit einfachen Mitteln nahezu vollständig entleert werden kann.Proceeding from this, the invention has for its object to improve the known concrete pumps of the type mentioned in such a way that the material feed container can be almost completely emptied with simple means.

Zur Lösung dieser Aufgabe werden die im Patentanspruch 1 angegebenen Merkmale vorgeschlagen. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.To achieve this object, the features specified in claim 1 are proposed. Advantageous refinements and developments of the invention result from the dependent claims.

Zur Lösung dieser Aufgabe wird gemäß der Erfindung vorgeschlagen, daß die in den Materialaufgabebehälter mündenden stirnseitigen Förderzylinderöffnungen zumindest teilweise gegen Luftzutritt aus dem Materialaufgabebehälter bis in die Nähe des Behälterbodens vorzugsweise mittels eines Schiebers abdeckbar oder verschließbar sind.To achieve this object, it is proposed according to the invention that the end-of-the-line feed cylinder openings opening into the material feed container are at least partially coverable or closable against air access from the material feed container into the vicinity of the container bottom, preferably by means of a slide.

Eine bevorzugte Ausgestaltung der Erfindung sieht vor, daß an die Reinigungsöffnung des Schwenkrohrs oder Förderrohrs ein Transportrohr angeschlossen wird, über welches der Materialaufgabebehälter mit Hilfe der Förderzylinder bis auf eine kleine Restmenge entleert werden kann. Dabei ist zusätzlich ein das Förderrohr oder das Schwenkrohr zum freien Förderrohrende hin verschließendes Absperrorgan vorgesehen.A preferred embodiment of the invention provides that a transport pipe is connected to the cleaning opening of the swivel pipe or delivery pipe, via which the material feed container can be emptied to a small remaining amount with the aid of the delivery cylinder. In addition, a shut-off device closing the delivery pipe or the swivel pipe to the free end of the delivery pipe is provided.

Das Absperrorgan kann beispielsweise als Absperrschieber ausgebildet sein, der zweckmäßig im Bereich eines förderrohrseitigen Anschlußflansches außerhalb des Materialaufgabebehälters angeordnet ist.The shut-off device can be designed, for example, as a gate valve, which is expediently arranged in the region of a connecting flange on the delivery pipe outside the material feed container.

Grundsätzlich kann das Absperrorgan auch als in das Rohrinnere gegen die Förderrohr- oder Schwenkrohrwand anpreßbarer, vorzugsweise unter Druckeinwirkung verformbarer Dichtkörper ausgebildet sein, der von der Reinigungspatrone aus in das Förder- oder Schwenkrohr einführbar und in diesem vorzugsweise mittels eines biegeschlaffen, band- oder kettenartigen Halteorgans positionierbar ist. Um sicherzustellen, daß der Dichtkörper nicht ungewollt aus dem Förderrohr oder dem Schwenkrohr herausgedrängt wird, kann unabhängig von dem Halteorgan oder zusätzlich dazu ein in das Rohrinnere, vorzugsweise von der Reinigungsöffnung aus eingreifendes Sitz- oder Stützorgan für den Dichtkörper vorgesehen werden. Eine bevorzugte Ausgestaltung der Erfindung sieht vor, daß der Dichtkörper als unter der Einwirkung eines Druckmediums, vorzugsweise von Druckluft oder Druckflüssigkeit aufspreizbarer, und gegen die Rohrinnenfläche anpreßbarer Ball oder Ballon ausgebildet ist.In principle, the shut-off device can also be designed as a sealing body which can be pressed into the inside of the pipe against the conveyor pipe or swivel pipe, preferably deformable under the influence of pressure, which can be inserted into the delivery or swivel pipe from the cleaning cartridge and in this preferably by means of a limp, band-like or chain-like holding member is positionable. In order to ensure that the sealing body is not inadvertently forced out of the delivery pipe or the swivel tube, a seat or support member for the sealing body, which engages in the pipe interior, preferably from the cleaning opening, can be provided independently of the holding member or in addition thereto. A preferred embodiment of the invention provides that the sealing body as expandable under the action of a pressure medium, preferably compressed air or pressure fluid, and against the inner surface of the tube or ball can be pressed.

Im folgenden wird die Erfindung anhand einiger in der Zeichnung in schematischer Weise dargestellter Ausführungsbeispiele näher erläutert. Es zeigen

Fig. 1
eine schaubildliche Darstellung einer Dickstoffpumpe mit S-förmigem Schwenkrohr;
Fig. 2
eine schaubildliche Darstellung einer Dickstoffpumpe mit C-förmigem Schwenkrohr;
Fig. 3a
eine Seitenansicht der Dickstoffpumpe nach Fig. 2 teilweise im Schnitt mit am Schwenkrohr angeflanschtem Transportrohr und mit förderzylinderseitigen Begrenzungsschiebern;
Fig. 3b
eine Stirnseitenansicht der Begrenzungsschieber nach Fig. 3a.
In the following, the invention will be explained in more detail with reference to some exemplary embodiments shown schematically in the drawing. Show it
Fig. 1
a diagram of a thick matter pump with an S-shaped swivel tube;
Fig. 2
a diagram of a thick matter pump with a C-shaped swivel tube;
Fig. 3a
a side view of the thick matter pump of Figure 2, partly in section with flanged on the swivel tube transport tube and with delivery cylinder side limit slides.
Fig. 3b
an end view of the limit slide according to Fig. 3a.

Die in der Zeichnung dargestellten Zweizylinder-Dickstoffpumpen sind für den Einsatz in stationären und fahrbaren Betonpumpen bestimmt. Sie bestehen im wesentlichen aus zwei Förderzylindern 10 mit hydraulisch im Gegentakt angetriebenen Förderkolben 12, einem Materialaufgabebehälter 14 und einem mit einem Schwenkrohr 16 in den Materialaufgabebehälter 14 eingreifenden, mit einem Umsteuermechanismus 18 betätigbaren Schiebervorrichtung 20. 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 12 in den Förderzylindern 10 vor die eine oder andere Öffnung 22 geschwenkt. Auf diese Weise wird bei in Richtung des Pfeils 30 zurückbewegtem Förderkolben 12 Material aus dem Materialaufgabebehälter 14 durch die Öffnung 22 in Richtung des Pfeils 32 in den betreffenden Förderzylinder 10 angesaugt, während über den anderen Förderkolben 12 Material in Richtung der Pfeile 34,36,38 durch das Schwenkrohr 16 hindurch in ein außerhalb des Materialaufgabebehälters 14 befindliches Förderrohr 42 transportiert wird. Das Förderrohr 42 kann an eine nicht dargestellte Förderleitung eines Betonverteilermasts angeschlossen werden.The two-cylinder slurry pumps shown in the drawing are intended for use in stationary and mobile concrete pumps. They essentially consist of two delivery cylinders 10 with delivery pistons 12 driven hydraulically in push-pull, a material feed container 14 and a slide device 20 which engages with a swivel tube 16 in the material feed container 14 and can be actuated with a reversing mechanism 18. The delivery cylinders 10 are in the lower region Connected via openings 22 to the rear wall 24 of the material feed container 14, the openings 22 on the inside of the material feed container 14 being delimited by an eyeglass-shaped wear plate 26. The swivel tube 16 abuts with its one end, which carries a wear ring 28, against the wear plate 26 and is swiveled in front of one or the other opening 22 by the reversing mechanism 18 depending on the direction of movement of the delivery pistons 12 in the delivery cylinders 10. In this way, when the delivery piston 12 moves back in the direction of the arrow 30, material is sucked out of the material feed container 14 through the opening 22 in the direction of the arrow 32 into the relevant delivery cylinder 10, while material in the direction of the arrows 34, 36, 38 via the other delivery piston 12 is transported through the swivel tube 16 into a conveying tube 42 located outside the material feed container 14. The delivery pipe 42 can be connected to a delivery line, not shown, of a concrete placing boom.

Die in Fig. 1 und 2 gezeigten Ausführungsbeispiele unterscheiden sich vor allem in der Form des Schwenkrohrs 16. Bei dem Ausführungsbeispiel nach Fig. 1 ist das Schwenkrohr im wesentlichen S-förmig ausgebildet. Es ist an seinem den Förderzylindern gegenüberliegenden Ende über eine behälterfeste, zu seiner Schwenkachse koaxiale Rohrdrehverbindung 43 mit dem Förderrohr 42 verbunden, und greift auf der anderen Seite mit einer als Antriebswelle ausgebildeten Achswelle 45 durch ein Drehlager 47 des Materialaufgabebehälters 14 hindurch. Der nach außen überstehende Wellenstumpf der Achswelle 45 ist drehfest mit einem Umsteuerhebel 46 des Umsteuermechanismus 18 verbunden, der an seinem nach oben weisenden Ende zwei nach entgegengesetzten Seiten weisende, als Kugelpfannen ausgebildete Lagerstellen 48 für den Anschluß je eines kolbenseitigen Kugelkopfes 50 der beiden Antriebszylinder 52 des Umsteuermechanismus 18 aufweist. Auf der Zylinderseite sind die Antriebszylinder 52 mit einem weiteren Kugelkopf 54 in je einer förderzylinderfesten, als Kugelpfanne ausgebildeten Lagerstelle 56 gelagert.The exemplary embodiments shown in FIGS. 1 and 2 differ primarily in the shape of the swivel tube 16. In the exemplary embodiment according to FIG. 1, the swivel tube is essentially S-shaped. It is connected at its end opposite the feed cylinders to the feed pipe 42 via a tubular pipe joint 43 which is fixed to the container and coaxial with its pivot axis, and engages on the other side with an axle shaft 45 designed as a drive shaft Pivot bearing 47 of the material feed container 14 therethrough. The outwardly projecting stub shaft of the axle shaft 45 is rotatably connected to a reversing lever 46 of the reversing mechanism 18, which at its upward-facing end facing two opposite sides, designed as ball sockets 48 for the connection of a piston-side ball head 50 of the two drive cylinders 52 Reversing mechanism 18 has. On the cylinder side, the drive cylinders 52 are supported with a further ball head 54 in a bearing point 56 which is fixed to the delivery cylinder and is designed as a ball socket.

Im Unterschied dazu ist bei dem in Fig. 2 gezeigten Ausführungsbeispiel ein C-förmiges Schwenkrohr 16 vorgesehen, das von oben her in den Materialaufgabebehälter 14 eingreift. Das Schwenkrohr 16 ist über einen Flansch 40 mit dem als Verlängerungsrohr ausgebildeten Förderrohr 42 verbunden, das seinerseits über eine nicht dargestellte Rohrdrehverbindung an eine Förderleitung eines Betonverteilermasts angeschlossen ist. Der Flansch 40 ist mittels zweier Spannschrauben 44 mit dem Umsteuerhebel 46 des Umsteuermechanismus 18 lösbar verbunden, der an seinem unteren Ende zwei nach entgegengesetzten Seiten weisende, als Kugelpfannen ausgebildete Lagerstellen 48 für den Anschluß je eines kolbenseitigen Kugelkopfes 50 der beiden Antriebszylinder 52 des Umsteuermechanismus 18 aufweist. Auf der Zylinderseite sind die Antriebszylinder 52 mit einem weiteren Kugelkopf 54 in je einer förderzylinderfesten, als Kugelpfanne ausgebildeten Lagerstelle 56 gelagert. Die Antriebszylinder 52 sind einseitig mit Drucköl beaufschlagbar und enthalten einen den Kugelkopf 50 tragenden Plungerkolben 60.In contrast to this, in the exemplary embodiment shown in FIG. 2, a C-shaped swivel tube 16 is provided which engages in the material feed container 14 from above. The swivel tube 16 is connected via a flange 40 to the delivery tube 42, which is designed as an extension tube and which in turn is connected to a delivery line of a concrete placing boom via an unillustrated tube rotary connection. The flange 40 is detachably connected by means of two clamping screws 44 to the reversing lever 46 of the reversing mechanism 18, which has at its lower end two bearing points 48, which are designed as ball sockets, for the connection of one piston-side spherical head 50 each of the two drive cylinders 52 of the reversing mechanism 18 at its lower end . On the cylinder side, the drive cylinders 52 are equipped with a further ball head 54, each in a delivery cylinder fixed Ball socket trained bearing 56 stored. The drive cylinders 52 can be pressurized with pressure oil on one side and contain a plunger 60 that supports the ball head 50.

Am Ende eines Fördervorgangs müssen die Rohrleitungen der Dickstoffpumpe und der Materialaufgabebehälter entleert und gereinigt werden. Zu diesem Zweck sind im Bereich der Rohrwandungen des Schwenkrohrs 16 (Fig. 2) und/oder des Förderrohrs 42 Reinigungsöffnungen 80 vorgesehen, die mit einem Deckel 82 und einem Kupplungsorgan 84 verschließbar sind.At the end of a conveying process, the pipes of the thick matter pump and the material feed container must be emptied and cleaned. For this purpose, cleaning openings 80 are provided in the area of the tube walls of the swivel tube 16 (FIG. 2) and / or the delivery tube 42, which can be closed with a cover 82 and a coupling element 84.

An der Unterseite des Materialaufgabebehälters 14 befindet sich eine mit einem Schwenkdeckel 70 verschließbare Öffnung 72, über die der Materialaufgabebehälter 14 vollständig entleert werden kann.On the underside of the material feed container 14 there is an opening 72 which can be closed with a swivel lid 70 and through which the material feed container 14 can be completely emptied.

Bei dem in Fig. 3a und b gezeigten Ausführungsbeispiel kann der Materialaufgabebehälter 14 auch über die Betonpumpe entleert werden. Dazu wird die Reinigungsöffnung 80 am Schwenkrohr 16 mit einem Druckschlauch 122 bestückt und der Weg zum Förderrohr 42 durch den Ballon 98 versperrt. Wenn zusätzlich über die im Bereich der brillenförmigen Verschleißplatte 26 angeordneten, von oben nach unten verschiebbaren Schieber 124 dafür gesorgt wird, daß beim Ansaugen nur der untere Bereich der Förderzylinderöffnungen 22 zum Materialaufgabebehälter 14 hin offen ist, kann der Materialaufgabebehälter mit diesen Maßnahmen nahezu vollständig entleert werden. Der dann noch verbleibende Restbeton kann über die Öffnung 72 entfernt werden.In the embodiment shown in FIGS. 3a and b, the material feed container 14 can also be emptied via the concrete pump. For this purpose, the cleaning opening 80 on the swivel tube 16 is equipped with a pressure hose 122 and the path to the delivery tube 42 is blocked by the balloon 98. If, in addition, the slide 124 arranged in the area of the spectacle-shaped wear plate 26, which can be moved from top to bottom, ensures that only the lower area of the feed cylinder openings 22 to the material feed container 14 is open during suction, the material feed container can be almost completely emptied with these measures will. The remaining concrete then remaining can be removed via the opening 72.

Zusammenfassend ist folgendes festzustellen: Die Erfindung bezieht sich auf eine Dickstoffpumpe, insbesondere eine Betonpumpe, mit einem Materialaufgabebehälter 14, zwei mit ihren stirnseitigen Öffnungen 22 in das Innere des Materialaufgabebehälters 14 mündenden Förderzylindern 10, einem in den Materialaufgabebehälter 14 eingreifenden, mit seinem einen Ende taktweise abwechselnd mit den stirnseitigen Öffnungen 22 der Förderzylinder kommunizierenden und mit seinem anderen Ende an ein Förderrohr 42 angeschlossenen Schwenkrohr 16 und mit einer in der Nähe des schwenkrohrseitigen Endes des Förderrohrs 42 oder in einem außerhalb des Materialaufgabebehälters angeordneten Abschnitt des Schwenkrohrs 16 in der betreffenden Rohrwand angeordneten verschließbaren Reinigungsöffnung 80. Erfindungsgemäß sind die in den Materialaufgabebehälter mündenden stirnseitigen Förderzylinderöffnungen 22 gegen Luftzutritt aus dem Materialaufgabebehälter 14 zumindest teilweise bis in die Nähe des Materialaufgabebehälterbodens, vorzugsweise mittels eines Schiebers 122 abdeckbar oder anschließbar.In summary, the following can be stated: The invention relates to a thick matter pump, in particular a concrete pump, with a material feed container 14, two conveying cylinders 10 opening with their end openings 22 into the interior of the material feed container 14, and one end intermittently engaging in the material feed container 14 alternately with the end openings 22 of the feed cylinder communicating and with its other end connected to a feed tube 42 and with a pivot tube 16 near the end of the feed tube 42 on the pivot tube side or in a section of the pivot tube 16 arranged outside the material feed container in the relevant tube wall Cleaning opening 80. According to the invention, the end-side delivery cylinder openings 22 opening into the material feed container are at least partially up to the point of preventing air from entering the material feed container 14 he the bottom of the material feed container, preferably covered or connectable by means of a slide 122.

Claims (8)

Dickstoffpumpe mit einem Materialaufgabebehälter (14), zwei mit ihren stirnseitigen Öffnungen (22) in das Innere des Materialaufgabebehälters (14) mündenden, hydraulisch angetriebenen Förderzylindern (10), einem in den Materialaufgabebehälter (14) eingreifenden, mit seinem einen Ende taktweise abwechselnd mit den stirnseitigen Öffnungen (22) der Förderzylinder (10) kommunizierenden und mit seinem anderen Ende an ein Förderrohr (42) angeschlossenen Schwenkrohr (16), dadurch gekennzeichnet, daß die in den Materialaufgabebehälter (14) mündenden stirnseitigen Förderzylinderöffnungen (22) gegen Luftzutritt aus dem Materialaufgabebehälter (14) zumindest teilweise bis in die Nähe des Materialaufgabebehälterbodens, vorzugsweise mittels eines Schiebers (122) abdeckbar oder verschließbar sind.Thick matter pump with a material feed container (14), two with its front openings (22) opening into the interior of the material feed container (14), hydraulically driven delivery cylinders (10), one engaging in the material feed container (14), with one end alternating with the cycles End openings (22) of the conveying cylinder (10) communicating and with its other end connected to a conveying tube (42) pivoting tube (16), characterized in that the end conveying cylinder openings (22) opening into the material feed container (14) prevent air from entering the material feed container (14) can be covered or closed at least partially up to the vicinity of the material feed container bottom, preferably by means of a slide (122). Dickstoffpumpe nach Anspruch 1 mit einer in der Nähe des schwenkrohrseitigen Endes des Förderrohrs (42) oder in einem außerhalb des Materialaufgabebehälters (14) angeordneten Abschnitt des Schwenkrohrs (16) in der betreffenden Rohrwand angeordneten verschließbaren Reinigungsöffnung (80), dadurch gekennzeichnet, daß an die Reinigungsöffnung (80) ein Transportrohr (122) anschließbar ist und daß das Förderrohr (42) oder das Schwenkrohr (16) zum freien Förderrohrende hin mittels eines Absperrorgans (98) verschließbar ist.Thick matter pump according to Claim 1 with a closable cleaning opening (80) arranged in the vicinity of the end of the delivery tube (42) on the side of the pivoting tube or in a section of the pivoting tube (16) arranged outside the material feed container (14), characterized in that the Cleaning opening (80) a transport pipe (122) can be connected and that the delivery pipe (42) or the swivel pipe (16) to the free end of the delivery pipe by means of a shut-off device (98) can be closed. Dickstoffpumpe nach Anspruch 2, dadurch gekennzeichnet, daß das Absperrorgan als Absperrschieber ausgebildet ist.Thick matter pump according to claim 2, characterized in that the shut-off element is designed as a gate valve. Dickstoffpumpe nach Anspruch 3, dadurch gekennzeichnet, daß der Absperrschieber im Bereich eines förderrohrseitigen Anschlußflanschs (40) außerhalb des Materialaufgabebehälters (14) angeordnet ist.Thick matter pump according to claim 3, characterized in that the gate valve is arranged in the region of a connecting flange (40) on the conveyor pipe outside the material feed container (14). Dickstoffpumpe nach Anspruch 2, dadurch gekennzeichnet, daß das Absperrorgan als im Rohrinneren gegen die Förderrohr- oder Schwenkrohrwand anpreßbarer, vorzugsweise unter Druckeinwirkung verformbarer Dichtkörper (98) ausgebildet ist.Thick matter pump according to Claim 2, characterized in that the shut-off element is designed as a sealing body (98) which can be pressed against the wall of the delivery pipe or swivel pipe, preferably deformable under the action of pressure. Dickstoffpumpe nach Anspruch 5, dadurch gekennzeichnet, daß der Dichtkörper (98) von der Reinigungspatrone aus in das Förder- oder Schwenkrohr einführbar und in diesem vorzugsweise mittels eines biegeschlaffen, band- oder kettenartigen Halteorgans (116) positionierbar ist.Thick matter pump according to claim 5, characterized in that the sealing body (98) can be inserted into the conveying or pivoting tube from the cleaning cartridge and can be positioned therein preferably by means of a limp, band-like or chain-like holding member (116). Dickstoffpumpe nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß der Dichtkörper (98) als unter der Einwirkung eines Druckmediums, vorzugsweise von Druckluft oder Druckflüssigkeit aufspreizbarer, gegen die Rohrinnenfläche anpreßbarer Ballon oder Ball ausgebildet ist.Thick matter pump according to Claim 5 or 6, characterized in that the sealing body (98) is designed as a balloon or ball which can be expanded under the action of a pressure medium, preferably compressed air or pressure liquid, and can be pressed against the inner surface of the pipe. Dickstoffpumpe nach einem der Ansprüche 5 bis 7, gekennzeichnet durch ein in das Rohrinnere, vorzugsweise von der Reinigungsöffnung aus eingreifendes Sitz- oder Stützorgan (118) für den Dichtungskörper (98).Thick matter pump according to one of claims 5 to 7, characterized by a seat or support member (118) for the sealing body (98) which engages in the tube interior, preferably from the cleaning opening.
EP97111499A 1994-04-28 1995-04-21 Thick matter pump Expired - Lifetime EP0805273B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4414845 1994-04-28
DE4414845 1994-04-28
EP95917350A EP0757756B1 (en) 1994-04-28 1995-04-21 Thick matter pump

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EP95917350A Division EP0757756B1 (en) 1994-04-28 1995-04-21 Thick matter pump
EP95917350.1 Division 1995-11-09

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EP0805273A2 true EP0805273A2 (en) 1997-11-05
EP0805273A3 EP0805273A3 (en) 1998-01-07
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EP95917350A Expired - Lifetime EP0757756B1 (en) 1994-04-28 1995-04-21 Thick matter pump
EP97111498A Expired - Lifetime EP0805272B1 (en) 1994-04-28 1995-04-21 Thick matter pump

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EP (3) EP0805273B1 (en)
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DE (4) DE59510098D1 (en)
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Also Published As

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EP0805272A3 (en) 1998-01-07
EP0757756B1 (en) 1999-01-27
JPH09512321A (en) 1997-12-09
DE19514750A1 (en) 1995-11-02
EP0805272A2 (en) 1997-11-05
EP0805272B1 (en) 2002-03-06
US5957675A (en) 1999-09-28
DE59510098D1 (en) 2002-04-11
WO1995030088A1 (en) 1995-11-09
ES2128725T3 (en) 1999-05-16
EP0805273A3 (en) 1998-01-07
DE59504991D1 (en) 1999-03-11
EP0757756A1 (en) 1997-02-12
DE59510099D1 (en) 2002-04-11
EP0805273B1 (en) 2002-03-06
ES2171784T3 (en) 2002-09-16
ES2171785T3 (en) 2002-09-16

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