EP0574728A1 - Checking and transporting of a building material mixture - Google Patents

Checking and transporting of a building material mixture Download PDF

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Publication number
EP0574728A1
EP0574728A1 EP93108255A EP93108255A EP0574728A1 EP 0574728 A1 EP0574728 A1 EP 0574728A1 EP 93108255 A EP93108255 A EP 93108255A EP 93108255 A EP93108255 A EP 93108255A EP 0574728 A1 EP0574728 A1 EP 0574728A1
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EP
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Prior art keywords
mixing
mixture
screw
mixing tube
baffle plate
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EP93108255A
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German (de)
French (fr)
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EP0574728B1 (en
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Martin Theodor Melchior
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/12—Supplying or proportioning liquid ingredients
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/1238—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
    • B28C5/1292—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices with rotating stirring and feeding or discharging means fixed on the same axis, e.g. in an inclined container fed at its lower part

Definitions

  • the invention relates to a method and a device for the continuous production and simultaneous delivery of a water and hydraulically bindable solid material in a homogeneous mixture containing pumpable building material mixture such as plastering mortar.
  • Methods and devices for producing a pumpable mortar for example for plastering walls or ceilings, are known. These are often designed to carry out a discontinuous mode of operation, ie the device has a separate mixing device, in which the mixture is prepared and this is then poured into a delivery container with a thick material pump flanged on from the mixing device and conveyed from there to the construction site.
  • discontinuously operating systems consist, inter alia, in that a prolonged interruption between the preparation of the mixture and its further processing can result in harmful segregation.
  • discontinuous operation has fundamental disadvantages compared to a continuous mode of operation, because interruptions in processing occur between the individual batches, which lead to losses in working hours and productivity and thus unnecessarily burden the construction costs.
  • the invention has for its object to provide a method and an apparatus of the type mentioned in the preamble of claim 1, with which the difficulties and technical limits mentioned are overcome and which a continuous production of a mixture free of air inclusions with the smallest possible volume and weight of Device allows.
  • a device for carrying out the method is characterized by the features a) to g) specified in the characterizing part of claim 3.
  • the device shown in the figure has a mixing tube (1) which is circular in cross section and in the interior of which a mixing screw (3) with worm spirals (4) is arranged which rotates around a drive shaft (2).
  • a mixing tube (1) which is circular in cross section and in the interior of which a mixing screw (3) with worm spirals (4) is arranged which rotates around a drive shaft (2).
  • a feed opening (5) Approximately half the length of the mixing tube (1) has a feed opening (5) and within it a metering device (6) for metering solids.
  • a concentric water injection device (7) rotating in a peripheral arrangement inside the mixing tube (1).
  • This consists of an annular hollow profile welded to the inner wall of the mixing tube (1) in a watertight manner and, in accordance with the exemplary embodiment shown, has an angular cross section.
  • the hollow profile can also have a semicircular or U-shaped or similar cross section.
  • Distributed nozzle bores (19) are located on the circumference of the hollow profile, from which the mixing water for mashing the solid is injected under pressure in concentric jets into the solid.
  • the water injection device (7) has a water connection (24) which is connected to a pressurized water source via a line (not shown) with an adjustable metering device.
  • a breather (9) At the drive end (8) of the mixing screw (3) in the upper area of the mixing tube (1) there is a breather (9).
  • the mixing device at the output end (10) on the mixing screw (3) has a baffle plate (11) which releases a peripheral annular gap (13) between the inner wall of the mixing tube 1 and its outer edge (12).
  • the mixing tube (1) has a concentric discharge opening at a distance from the baffle plate (11) in the discharge direction (14) having a comparatively smaller diameter than the baffle plate (11), to which the housing (15) of a thick material kneading pump (16) connects.
  • the drive shaft (2) of the mixing screw (3) is rotatably connected to the rotor (18) of the pump (16) via a coupling (17).
  • the solids feed opening (5) very advantageously has a collar (20) with a flange (21) for the substructure on a solids silo container with intermediate arrangement of the solids metering device (6).
  • This is advantageously designed as a rotary valve.
  • the coupling (17) between the drive shaft (2) and the pump rotor (18) is designed as an elastic coupling with coupling intermediate members made of elastic material such as rubber or plastic.
  • the coupling (17) can be equipped with an overload safety device, for example with a shear pin safety device (22).
  • the mixing screw (3) can also be at least partially equipped with mixing paddles instead of part or all of its screw turns (4). Further alternative configurations relate to the position of the mixing tube (1). This can either be arranged with a vertical axis (yy), as shown, or also with a horizontal axis.
  • the device according to the invention is suitable with great advantage for fully automatic, continuous operation for the production and simultaneous delivery of water and hydraulically bindable solid in a homogeneous mixture containing pumpable building material mixture such as plastering mortar.
  • Its special design and mode of operation according to the invention ensures that no air inclusions are conveyed during this continuous operation, which enables a completely undisturbed, uniform application of the cleaning material to the construction site while overcoming the difficulties that existed to date.
  • the device is uncomplicated, requires only a comparatively small construction volume and light weight and is distinguished by a high degree of reliability. In this respect, the invention optimally fulfills the task set out above.

Abstract

The invention relates to a process for the continuous production and simultaneous transporting of a pumpable building material (construction material) mixture, such as plaster mortar, containing water and hydraulically bindable solid in a homogeneous mixture. The process is characterised in that solid and water are charged to a mixing chamber, approximately in the central region of its mixing space, with continuous metering of proportional mixture components and are transported using a mixing screw (3) with screw helices (4) circulating around a shaft, in a toroidal material flow, with the build-up of a backpressure. In the process they are mixed, proportional air inclusions emerging from the resulting mixture in the opposite direction to the backpressure gradient and being discharged from the mixing chamber at a point in the mixing space opposite to the transport direction. The process is also characterised in that the material flow of the mixture is transported around a concentric baffle plate (11) at the end of the mixing zone, is charged from circumferential regions of the mixing space into the feed side of a slurry pump (16) and is transported further therein with the build-up of a pump pressure. A device is described. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zur kontinuierlichen Herstellung und simultanen Förderung eines Wasser sowie hydraulisch bindungsfähigen Festoff in homogener Mischung enthaltenden pumpfähigen Baustoffgemisches wie Putzmörtel.The invention relates to a method and a device for the continuous production and simultaneous delivery of a water and hydraulically bindable solid material in a homogeneous mixture containing pumpable building material mixture such as plastering mortar.

Verfahren und Vorrichtungen zur Herstellung eines pumpfähigen Mörtels beispielsweise zum Verputzen von Wänden bzw. Decken sind bekannt. Diese sind vielfach zur Durchführung einer diskontinuierlichen Betriebsweise ausgebildet, d.h. die Vorrichtung besitzt eine separate Mischeinrichtung, worin die Mischung bereitet und diese dann in einen von der Mischeinrichtung getrennten Lieferbehälter mit angeflanschter Dickstoffpumpe umgefüllt und daraus zur Baustelle gefördert wird.
Nachteile derartiger diskontinuierlich arbeitender Systeme bestehen u. a. darin, daß bei einer längeren Unterbrechung zwischen Bereitung der Mischung und deren Weiterverarbeitung eine schädliche Entmischung stattfinden kann. Darüberhinaus hat ein diskontinuierlicher Betrieb gegenüber einer kontinuierlichen Betriebsweise grundsätzliche Nachteile, weil zwichen den einzelnen Chargen Unterbrechungen bei der Verarbeitung auftreten, die zu Verlusten an Arbeitszeiten und Produktivität führen und somit die Baukosten unnötig belasten. Und schließlich ergeben sich Materialverluste z.B. dadurch, daß eine hergestellte Mischung nicht vollständig verbraucht wird, wobei neben dem Verlust auch noch Entsorgungsprobleme entstehen. Darüberhinaus beanspruchen die diskontinuierlich arbeitenden Geräte zur Herstellung und Förderung von Putzmitteln einen vergleichweise großen maschinellen Aufwand mit relativ hohem Transportgewicht und entsprechend erhöhten Kosten.Methods and devices for producing a pumpable mortar, for example for plastering walls or ceilings, are known. These are often designed to carry out a discontinuous mode of operation, ie the device has a separate mixing device, in which the mixture is prepared and this is then poured into a delivery container with a thick material pump flanged on from the mixing device and conveyed from there to the construction site.
Disadvantages of such discontinuously operating systems consist, inter alia, in that a prolonged interruption between the preparation of the mixture and its further processing can result in harmful segregation. In addition, discontinuous operation has fundamental disadvantages compared to a continuous mode of operation, because interruptions in processing occur between the individual batches, which lead to losses in working hours and productivity and thus unnecessarily burden the construction costs. And finally, material losses result, for example, from the fact that a mixture produced is not complete is consumed, and besides the loss there are also disposal problems. In addition, the discontinuously operating devices for the production and conveyance of cleaning agents require a comparatively large amount of mechanical effort with a relatively high transport weight and correspondingly increased costs.

Zur Abhilfe wurden bereits Geräte mit kontinuierlicher Arbeitsweise für Aufbereitung und Förderung in einem geschlossenen System entwickelt. Dabei ergab sich die Schwierigkeit, daß beim Mischprozeß mit dem Feststoff Luftanteile in die Mischung eingeschlossen werden, welche dann bei der Verarbeitung zu Schwierigkeiten führen und insbesondere die Gleichmäßigkeit des Auftrages von Putzmaterial auf Decken und Wände erheblich stören.To remedy this, devices with continuous operation for processing and conveying in a closed system have already been developed. The difficulty arose that during the mixing process with the solid air portions are included in the mixture, which then lead to difficulties during processing and, in particular, considerably disrupt the uniformity of the application of cleaning material to ceilings and walls.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren sowie eine Vorrichtung der im Oberbegriff von Anspruch 1 genannten Art anzugeben, mit welchen die genannten Schwierigkeiten und technischen Grenzen überwunden werden und welche eine kontinuierliche Herstellung einer von Lufteinschlüssen freien homogenen Mischung bei möglichst geringem Bauvolumen und Gewicht der Vorrichtung ermöglicht.The invention has for its object to provide a method and an apparatus of the type mentioned in the preamble of claim 1, with which the difficulties and technical limits mentioned are overcome and which a continuous production of a mixture free of air inclusions with the smallest possible volume and weight of Device allows.

Die Lösung der Aufgabe gelingt bei einem Verfahren der eingangs genannten Art mit den im Kennzeichnungsteil von Anspruch 1 angegebenen Verfahrensschritten.The problem is solved in a method of the type mentioned at the outset with the method steps specified in the characterizing part of claim 1.

Eine Vorrichtung zur Durchführung des Verfahrens ist durch die im Kennzeichnungsteil von Anspruch 3 angegebenen Merkmale a) bis g) gekennzeichnet.A device for carrying out the method is characterized by the features a) to g) specified in the characterizing part of claim 3.

Weitere Ausgestaltungen des Verfahrens und der Vorrichtung sind entsprechend den Unteransprüchen vorgesehen.Further refinements of the method and the device are provided in accordance with the subclaims.

Die Erfindung wird in einer rein schematischen Zeichnung in beispielhafter Ausführungsform gezeigt, wobei aus deren Beschreibung weitere Einzelheiten und Vorteile entnehmbar sind.The invention is shown in a purely schematic drawing in an exemplary embodiment, further details and advantages being apparent from the description thereof.

Die in der Figur gezeigte Vorrichtung weist ein im Querschnitt kreisförmiges Mischrohr (1) auf, in dessen Innern als Mischorgan eine um eine Antriebswelle (2) umlaufende Mischschnecke (3) mit Schneckenwendeln (4) angeordnet ist. Etwa in der halben Länge des Mischrohres (1) ist eine Aufgabeöffnung (5) und innerhalb derselben eine Dosiereinrichtung (6) zur dosierenden Aufgabe von Feststoffen angeordnet. Neben der Aufgabeöffung (5) befindet sich im Innern des Mischrohres (1) eine in peripherer Anordnung umlaufende konzentrische Wassereindüsungseinrichtung (7). Diese besteht aus einem ringförmigen, mit der Innenwand des Mischrohres (1) wasserdicht verschweißten Hohlprofil und weist entsprechend dem gezeigten Ausführungsbeispiel einen winkelförmigen Querschnitt auf. Das Hohlprofil kann jedoch auch einen halbkreisförmigen bzw. U-förmigen oder ähnlichen Querschnitt aufweisen. Am Umfang des Hohlprofiles befinden sich verteilt angeordnete Düsenbohrungen (19), aus welchen das Anmachwasser zum Anmaischen des Feststoffes unter Druck in konzentrischen Strahlen in den Feststoff eingedüst wird. Die Wassereindüsungsvorrichtung (7) weist einen Wasseranschluß (24) auf, der über eine (nicht gezeigte) Leitung mit einer einstellbaren Dosiereinrichtung an eine Druckwasserquelle angeschlossen ist.
Am antriebsseitigen Ende (8) der Mischschnecke (3) ist im oberen Bereich des Mischrohres (1) ein Entlüfungsorgan (9) angeordnet. Weiterhin weist die Mischvorrichtung am abtriebsseitigen Ende (10) an der Mischschnecke (3) eine Stauscheibe (11) auf, die zwischen Innenwandung des Mischrohres 1 und ihrem Außenrand (12) einen peripheren Ringspalt (13) freigibt.The device shown in the figure has a mixing tube (1) which is circular in cross section and in the interior of which a mixing screw (3) with worm spirals (4) is arranged which rotates around a drive shaft (2). Approximately half the length of the mixing tube (1) has a feed opening (5) and within it a metering device (6) for metering solids. In addition to the feed opening (5), there is a concentric water injection device (7) rotating in a peripheral arrangement inside the mixing tube (1). This consists of an annular hollow profile welded to the inner wall of the mixing tube (1) in a watertight manner and, in accordance with the exemplary embodiment shown, has an angular cross section. However, the hollow profile can also have a semicircular or U-shaped or similar cross section. Distributed nozzle bores (19) are located on the circumference of the hollow profile, from which the mixing water for mashing the solid is injected under pressure in concentric jets into the solid. The water injection device (7) has a water connection (24) which is connected to a pressurized water source via a line (not shown) with an adjustable metering device.
At the drive end (8) of the mixing screw (3) in the upper area of the mixing tube (1) there is a breather (9). Furthermore, the mixing device at the output end (10) on the mixing screw (3) has a baffle plate (11) which releases a peripheral annular gap (13) between the inner wall of the mixing tube 1 and its outer edge (12).

Eine Ausgestaltung sieht vor, daß das Mischrohr (1) in Austragsrichtung im Abstand der Stauscheibe (11) eine konzentrische Austragsöffnung (14) mit zur Stauscheibe (11) vergleichsweise kleinerem Durchmesser aufweist, an die sich das Gehäuse (15) einer Dickstoff-Knetpumpe (16) anschließt. Die Antriebswelle (2) der Mischschnecke (3) ist über eine Kupplung (17) mit dem Rotor (18) der Pumpe (16) drehfest verbunden.One embodiment provides that the mixing tube (1) has a concentric discharge opening at a distance from the baffle plate (11) in the discharge direction (14) having a comparatively smaller diameter than the baffle plate (11), to which the housing (15) of a thick material kneading pump (16) connects. The drive shaft (2) of the mixing screw (3) is rotatably connected to the rotor (18) of the pump (16) via a coupling (17).

Beim Betrieb der erfindungsgemäßen Vorrichtung wird Feststoff und Wasser unter kontinuierlicher Dosierung ihrer verhältnismäßigen Mischungsanteile dem Mischrohr (1) aufgegeben. Dabei erfolgt die volumetrische Dosierung der Feststoffe durch eine Zellenradschleuse (6) und die volumetrische Dosierung des Anmaischwassers mit Hilfe einer an sich bekannten, nicht gezeigten Flüssigkeitsdosiereinrichtung. Beide Dosiereinrichtungen können nach Programm von einem vollautomatischen Leitstand aus angesteuert werden. Durch intensive Drehbewegung der Mischschnecke (3) und ihrer an der Antriebswelle (2) angeordneten Schneckenwendel (4) wird im Mischrohr (1) eine torusförmige Massenströmung erzeugt, wobei Wasser und Feststoff innig homogen gemischt werden. Durch die Massenströmung und die Steigung der Schneckenwende (4) wird in der Materialsäule ein Staudruck aufgebaut, wobei anteilige Lufteinschlüsse in Gegenrichtung des Staudruckgradienten aus der entstehenden Mischung austreten und an einer der Förderrichtung entgegengesetzten Stelle des Mischraumes in dessen Trockenbereich (23) aus dem Mischrohr (1) ausgetragen werden.
Mit großem Vorteil wird dabei der Massenstrom der Mischung am Ende der Mischstrecke um die konzentrische (11) Stauscheibe herum durch den Ringspalt (13) zwischen der Innenwand des Mischrohres (1) und dem Außenrand (12) der Stauscheibe (11) hindurchgefördert. Dadurch wird sichergestellt, daß ausschließlich peripheres Mischgut ohne Lufteinschlüsse gefördert und in die aufgabenseitige Öffnung (25) des Pumpengehäuses (15) eingetragen wird.
Sehr vorteilhaft weist die Feststoff-Aufgabeöffnung (5) einen Kragen (20) mit einem Flansch (21) zum Unterbau an einen Feststoff-Silobehälter unter Zwichenanordnung der Feststoff-Dosiereinrichtung (6) auf. Diese ist vorteilhaft als Zellenradschleuse ausgebildet.
Mit Vorteil ist vorgesehen, daß die Kupplung (17) zwischen Antriebswelle (2) und Pumpenrotor (18) als elastische Kupplung mit aus elastischem Material wie Gummi oder Plastik ausgebildeten Kupplungs-Zwischengliedern ausgebildet ist.
Weiterhin kann die Kupplung (17) mit einer Überlastsicherung, beispielsweise mit einer Scherbolzensicherung (22) ausgerüstet sein. Auch kann die Mischschnecke (3) anstelle eines Teils oder aller ihrer Schneckenwenden (4) wenigstens teilweise mit Misch-Paddeln ausgerüstet sein. Weitere alternative Ausgestaltungen betreffen die Lage des Mischrohres (1). Dieses kann entweder mit vertikaler Achse (y-y), wie gezeigt, oder auch mit horizontaler Achse angeordnet sein.When the device according to the invention is in operation, solid and water are added to the mixing tube (1) while continuously metering their proportionate proportions of the mixture. The volumetric metering of the solids takes place through a rotary valve (6) and the volumetric metering of the mashing water with the aid of a liquid metering device, not known, which is known per se. Both dosing devices can be controlled according to the program from a fully automatic control center. The torch-shaped mass flow is generated in the mixing tube (1) by intensive rotation of the mixing screw (3) and its screw spiral (4) arranged on the drive shaft (2), water and solids being mixed intimately and homogeneously. Due to the mass flow and the incline of the screw turn (4), a dynamic pressure is built up in the material column, whereby proportionate air inclusions emerge from the resulting mixture in the opposite direction of the dynamic pressure gradient and from the mixing tube (23) in the drying area (23) of the mixing chamber ( 1) are carried out.
The mass flow of the mixture at the end of the mixing section around the concentric (11) baffle plate is conveyed with great advantage through the annular gap (13) between the inner wall of the mixing tube (1) and the outer edge (12) of the baffle plate (11). This ensures that only peripheral mix without air inclusions is conveyed and entered into the opening (25) of the pump housing (15).
The solids feed opening (5) very advantageously has a collar (20) with a flange (21) for the substructure on a solids silo container with intermediate arrangement of the solids metering device (6). This is advantageously designed as a rotary valve.
It is advantageously provided that the coupling (17) between the drive shaft (2) and the pump rotor (18) is designed as an elastic coupling with coupling intermediate members made of elastic material such as rubber or plastic.
Furthermore, the coupling (17) can be equipped with an overload safety device, for example with a shear pin safety device (22). The mixing screw (3) can also be at least partially equipped with mixing paddles instead of part or all of its screw turns (4). Further alternative configurations relate to the position of the mixing tube (1). This can either be arranged with a vertical axis (yy), as shown, or also with a horizontal axis.

Die Vorrichtung nach der Erfindung ist mit großem Vorteil zum vollautomatischen, kontinuierlichen Betrieb für die Herstellung und simultane Förderung eines Wasser sowie hydraulisch bindungsfähigen Feststoff in homogener Mischung enthaltenden pumpfähigen Baustoffgemisches wie Putzmörtel geignet. Durch ihre besondere Ausgestaltung und Betriebsweise nach der Erfindung ist sichergestellt, daß bei diesem kontinuierlichen Betrieb keine Lufteinschlüsse mitgefördert werden, wodurch unter Überwindung der bisher bestehenden Schwierigkeiten ein völlig ungestörtes, gleichmäßiges Auftragen des Putzmaterials an der Baustelle ermöglicht wird. Darüberhinaus ist die Vorrichtung unkompliziert, beansprucht nur vergleichsweise geringes Bauvolumen und geringes Gewicht und zeichnet sich durch einen hohen Grad an Zuverlässigkeit aus. Insofern erfüllt die Erfindung in optimaler Weise die eingangs gestellte Aufgabe.The device according to the invention is suitable with great advantage for fully automatic, continuous operation for the production and simultaneous delivery of water and hydraulically bindable solid in a homogeneous mixture containing pumpable building material mixture such as plastering mortar. Its special design and mode of operation according to the invention ensures that no air inclusions are conveyed during this continuous operation, which enables a completely undisturbed, uniform application of the cleaning material to the construction site while overcoming the difficulties that existed to date. In addition, the device is uncomplicated, requires only a comparatively small construction volume and light weight and is distinguished by a high degree of reliability. In this respect, the invention optimally fulfills the task set out above.

Claims (13)

Verfahren zur kontinuierlichen Herstellung und simultanen Förderung eines wasser- sowie hydraulisch bindungsfähigen Feststoff in homogener Mischung enthaltenden pumpfähigen Baustoffgemisches wie Putzmörtel, dadurch gekennzeichnet, daß Feststoff und Wasser unter kontinuierlicher Dosierung verhältnismäßiger Mischungssanteile einer Mischkammer etwa im mittleren Bereich ihres Mischraumes aufgegeben und dabei unter Verwendung einer Mischschnecke mit um eine Welle umlaufenden Schnekkenwendeln in einer torusförmigen Massenströmung unter Aufbau eines Staudruckes gefördert und dabei gemischt werden, wobei anteilige Lufteinschlüsse in Gegenrichtung des Staudruckgradienten aus der entstehenden Mischung austreten und an einer der Förderrichtung entgegengesetzten Stelle des Mischraumes aus der Mischkammer ausgetragen werden, und daß der Massenstrom der Mischung am Ende der Mischstrecke um eine konzentrische Stauscheibe herumgefördert dabei, aus peripheren Bereichen des Mischraumes in die Aufgabeseite einer Dickstoff-Pumpe eingetragen und darin unter Aufbau eines Pumpdruckes weitergefördert wird.Process for the continuous production and simultaneous conveyance of a pumpable building material mixture, such as plastering mortar, which contains water and hydraulically bindable solid in a homogeneous mixture, characterized in that solid and water are added to a mixing chamber approximately in the central region of its mixing space while continuously metering proportionate proportions of the mixture, using a mixing screw are conveyed and mixed with screw spirals rotating around a shaft in a toroidal mass flow while building up a dynamic pressure, partial air inclusions emerging in the opposite direction of the dynamic pressure gradient from the resulting mixture and being discharged from the mixing chamber at a point opposite the conveying direction of the mixing chamber, and that Mass flow of the mixture at the end of the mixing section conveyed around a concentric baffle plate from peripheral areas of the mixing space i n the feed side of a thick matter pump is entered and conveyed further under the build-up of a pump pressure. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß Feststoff in volumetrischer Dosierung unter Verwendung einer Zellenradschleuse und Wasser in volumetrischer Dosierung sowie mit einer Vielzahl peripherer, konzentrischer Düsenstrahlen unter Druck in die Mischkammer eingetragen werden.A method according to claim 1, characterized in that solid in volumetric metering using a rotary valve and water in volumetric metering and with a plurality of peripheral, concentric jet nozzles are introduced under pressure into the mixing chamber. Vorrichtung zur kontinuierlichen Herstellung und simultanen Förderung eines Wasser sowie hydraulisch bindungsfähigen Feststoff in homogener Mischung enthaltenden pumpfähigen Bauststoffgemisches wie Putzmörtel, zur Durchführung des erfindungsgemäßen Verfahrens, dadurch gekennzeichnet, daß diese folgende Elemente aufweist: a) ein Mischrohr (1), in dessen Innerem als Mischorgan eine um eine Antriebswelle (2) umlaufende Mischschnecke (3) mit Schneckenwendeln (4) angeordnet ist; b) etwa in der halben Länge des Mischrohres (1) ist eine Aufgabeöffnung (5) und innerhalb derselben eine Dosiereinrichtung (6) zur dosierenden Aufgabe von Feststoffen angeordnet; c) neben der Aufgabeöffnung (5) befindet sich im Inneren des Mischrohres (1) eine in peripherer Anordnung umlaufende, konzentrische Düsen (19) aufweisende Wassereindüsungseinrichtung (7); d) am antriebsseitigen Ende (8) der Mischschnecke (3) ist im oberen Bereich des Mischrohres (1) ein Entlüftungsorgan (9) angeordnet; e) am abtriebsseitigen Ende (10) weist die Mischschnecke (3) eine Stauscheibe (11) auf, die zwischen Innenwandung des Mischrohres (1) und dem Außenrand (12) der Stauscheibe (11) einen peripheren Ringspalt (13) freigibt; f) das Mischrohr (1) weist in Austragsrichtung im Abstand der Stauscheibe (11) eine konzentrische Austragsöffnung (14) mit zur Stauscheibe (11) vergleichsweise kleinerem Durchmesser auf, an die sich das Gehäuse (15) einer Dickstoff-Pumpe (16) anschließt; g) die Antriebswelle (2) der Mischschnecke (3) ist über eine Kupplung (17) mit dem Rotor (18) der Dickstoff-Pumpe (16) drehfest verbunden. Device for the continuous production and simultaneous delivery of a pumpable building material mixture, such as plastering mortar, containing water and hydraulically bindable solid in a homogeneous mixture, for carrying out the process according to the invention, characterized in that it has the following elements: a) a mixing tube (1), in the interior of which a mixing screw (3) with screw spirals (4) is arranged, which rotates around a drive shaft (2); b) about half the length of the mixing tube (1) has a feed opening (5) and within it a dosing device (6) for dosing feeding solids; c) in addition to the feed opening (5), in the interior of the mixing tube (1) there is a water injection device (7) which revolves in a peripheral arrangement and has concentric nozzles (19); d) at the drive end (8) of the mixing screw (3) in the upper area of the mixing tube (1) there is a ventilation element (9); e) at the output end (10), the mixing screw (3) has a baffle plate (11) which releases a peripheral annular gap (13) between the inner wall of the mixing tube (1) and the outer edge (12) of the baffle plate (11); f) the mixing tube (1) has in the discharge direction at a distance from the baffle plate (11) a concentric discharge opening (14) with the baffle plate (11) comparatively smaller diameter, to which the housing (15) of a thick matter pump (16) connects ; g) the drive shaft (2) of the mixing screw (3) is rotatably connected to the rotor (18) of the thick matter pump (16) via a coupling (17). Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Wassereindüsungsvorrichtung (7) ein ringörmiges, mit der Innenwand des Mischrohres (1) wasserdicht verschweißtes, eine Vielzahl am Umfang verteilt angeordnete Düsenbohrungen (19) aufweisendes Hohlprofil ist und beispielsweise einen winkelförmigen bzw. U-förmigen bzw. halbkreisförmigen Querschnitt aufweist.Apparatus according to claim 3, characterized in that the water injection device (7) is an annular hollow profile which is welded to the inner wall of the mixing tube (1) in a watertight manner and has a plurality of nozzle bores (19) distributed around the circumference and is, for example, an angular or U-shaped one or semicircular cross section. Vorrichtung nach den Ansprüchen 3 und 4, dadurch gekennzeichnet, daß die Feststoff-Aufgabeöffnung (5) einen Kragen (20) mit einem Flansch (21) zum Unterbau unter einen Feststoff-Silobehälter unter Zwischenanordnung der Dosiereinrichtung (6) aufweist.Device according to claims 3 and 4, characterized in that the solids feed opening (5) has a collar (20) with a flange (21) for mounting under a solids silo container with the metering device (6) arranged in between. Vorrichtung nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß die Dosiereinrichtung (6) für Feststoff eine Zellenradschleuse ist.Device according to one of claims 3 to 5, characterized in that the metering device (6) for solids is a cellular wheel sluice. Vorrichtung nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß die Kupplung (17) zwischen Antriebswelle (2) und Pumpenrotor (18) der Dickstoff-Pumpe (16) als elastische Kupplung mit aus elastischem Material wie Gummi oder Plastik bestehenden Kupplungs-Zwischengliedern ausgebildet ist.Device according to one of claims 3 to 6, characterized in that the coupling (17) between the drive shaft (2) and pump rotor (18) of the thick matter pump (16) as an elastic coupling with coupling intermediate members made of elastic material such as rubber or plastic is trained. Vorrichtung nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, daß die Kupplung (17) mit einer Überlastsicherung, beispielsweise mit einer Scherbolzensicherung (22) ausgerüstet ist.Device according to one of claims 3 to 7, characterized in that the coupling (17) is equipped with an overload safety device, for example with a shear pin safety device (22). Vorrichtung nach einem der Ansprüche 3 bis 8, dadurch gekennzeichnet, daß das Entlüftungsorgan (9) am Mischrohr (1) in dessen Trockenbereich (23) eingeordnet ist.Device according to one of claims 3 to 8, characterized in that the ventilation element (9) on the mixing tube (1) is arranged in its drying area (23). Vorrichtung nach einem der Ansprüche 3 bis 9, dadurch gekennzeichnet, daß die Mischschnecke (3) anstelle eines Teiles oder aller ihrer Schneckenwendeln (4) wenigstens teilweise mit Misch-Paddeln ausgerüstet ist.Device according to one of claims 3 to 9, characterized in that the mixing screw (3) is at least partially equipped with mixing paddles instead of part or all of its screw spirals (4). Vorrichtung nach einem der Ansprüche 3 bis 10, dadurch gekennzeichnet, daß das Mischrohr (1) mit kreisförmigem Querschnitt ausgebildet ist.Device according to one of claims 3 to 10, characterized in that the mixing tube (1) is designed with a circular cross section. Vorrichtung nach einem der Ansprüche 3 bis 11, dadurch gekennzeichnet, daß das Mischrohr (1) mit vertikaler Achse (y-y) angeordnet ist.Device according to one of claims 3 to 11, characterized in that the mixing tube (1) is arranged with a vertical axis (yy). Vorrichtung nach einem der Ansprüche 3 bis 12, dadurch gekennzeichnet, daß das Mischrohr (1) mit horizontaler Achse angeordnet ist.Device according to one of claims 3 to 12, characterized in that the mixing tube (1) is arranged with a horizontal axis.
EP93108255A 1992-06-19 1993-05-21 Checking and transporting of a building material mixture Expired - Lifetime EP0574728B1 (en)

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DE4219880 1992-06-19
DE4219880A DE4219880C2 (en) 1992-06-19 1992-06-19 Device for the continuous production and simultaneous delivery of a pumpable building material mixture, such as plastering mortar, containing water and hydraulically bindable solid in a homogeneous mixture

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EP0574728A1 true EP0574728A1 (en) 1993-12-22
EP0574728B1 EP0574728B1 (en) 1997-04-02

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EP0941827A2 (en) * 1998-03-12 1999-09-15 Wildgruber Baustoffwerke GmbH &amp; Co. KG Apparatus for on-site production of pumpable mortars
EP1000718A2 (en) * 1998-11-05 2000-05-17 Wildgruber Baustoffwerke GmbH &amp; Co. KG Mixer for making a pumpable mortar
CN1114473C (en) * 2000-06-19 2003-07-16 乔辛姆·霍尔兹 Method for preparing soild-water compound and method for implementing the method
CN102328348A (en) * 2011-04-22 2012-01-25 三一重工股份有限公司 Liquid weighing and feeding device and concrete production device comprising same
WO2015087214A1 (en) * 2013-12-10 2015-06-18 S&P Clever Reinforcement Company Ag Mixing and conveying system for dry mortar materials from a storage silo
CN107269002A (en) * 2016-04-07 2017-10-20 中建四局第六建筑工程有限公司 A kind of high grade rock sand concrete super high pump-conveying method and device

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CN111350353B (en) * 2020-04-07 2020-10-23 永康克卡自动化设备有限公司 Construct feeder of fixed quality of conveying at every turn

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EP0941827A2 (en) * 1998-03-12 1999-09-15 Wildgruber Baustoffwerke GmbH &amp; Co. KG Apparatus for on-site production of pumpable mortars
EP0941827A3 (en) * 1998-03-12 2001-02-28 Wildgruber Baustoffwerke GmbH &amp; Co. KG Apparatus for on-site production of pumpable mortars
EP1000718A2 (en) * 1998-11-05 2000-05-17 Wildgruber Baustoffwerke GmbH &amp; Co. KG Mixer for making a pumpable mortar
EP1000718A3 (en) * 1998-11-05 2002-06-05 Wildgruber Baustoffwerke GmbH &amp; Co. KG Mixer for making a pumpable mortar
CN1114473C (en) * 2000-06-19 2003-07-16 乔辛姆·霍尔兹 Method for preparing soild-water compound and method for implementing the method
CN102328348A (en) * 2011-04-22 2012-01-25 三一重工股份有限公司 Liquid weighing and feeding device and concrete production device comprising same
WO2015087214A1 (en) * 2013-12-10 2015-06-18 S&P Clever Reinforcement Company Ag Mixing and conveying system for dry mortar materials from a storage silo
US10427323B2 (en) 2013-12-10 2019-10-01 S&P Clever Reinforcement Company Ag Mixing and conveying facility for dry building materials from a supply silo
CN107269002A (en) * 2016-04-07 2017-10-20 中建四局第六建筑工程有限公司 A kind of high grade rock sand concrete super high pump-conveying method and device

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DE4219880A1 (en) 1993-12-23
ATE151008T1 (en) 1997-04-15
DE4219880C2 (en) 1996-07-18
DE59306008D1 (en) 1997-05-07
EP0574728B1 (en) 1997-04-02

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