EP0574728B1 - Fabrication et transport d'un mélange de matériaux de construction - Google Patents

Fabrication et transport d'un mélange de matériaux de construction Download PDF

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Publication number
EP0574728B1
EP0574728B1 EP93108255A EP93108255A EP0574728B1 EP 0574728 B1 EP0574728 B1 EP 0574728B1 EP 93108255 A EP93108255 A EP 93108255A EP 93108255 A EP93108255 A EP 93108255A EP 0574728 B1 EP0574728 B1 EP 0574728B1
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EP
European Patent Office
Prior art keywords
mixing
mixture
screw
mixing tube
coupling
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
Application number
EP93108255A
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German (de)
English (en)
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EP0574728A1 (fr
Inventor
Martin Theodor Melchior
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Individual
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Individual
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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 process for the continuous production and simultaneous conveyance of a pumpable building material mixture, such as plastering mortar, containing water and hydraulically bindable solid in a homogeneous mixture, solid and water being 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 rotating mass flow while building up a dynamic pressure, and partial air inclusions emerge from the resulting mixture in the opposite direction of the dynamic pressure gradient and are discharged from the mixing chamber at a point opposite the conveying direction of the mixing chamber. Furthermore, the invention relates to a device for performing the method.
  • a pumpable building material mixture such as plastering mortar, containing water and hydraulically bindable solid in a homogeneous mixture, solid and water being 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
  • 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.
  • discontinuous systems in that, in the case of a long interruption between the preparation of the mixture and its further processing, harmful segregation can take place.
  • 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.
  • material losses e.g. in that a mixture produced is not completely consumed, and besides the loss there are also disposal problems.
  • 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.
  • DE-B-1 277 819 describes a device for the continuous mixing of powdery to fine-grained bulk material, in particular building materials, and a liquid, with a storage container which holds the bulk material and is arranged essentially vertically, a mixing container directly downstream of this , which has a shaft with attached mixing tools and with in the longitudinal direction of the shaft extending through elevations for venting the resulting mixture and further with a feed pump downstream of the mixing tank, proposed that the mixing tank has a venting device at its higher end.
  • a device for mixing and conveying mortar or similar materials in which the material is fed to a metering device and mixed with liquid, mixed and conveyed.
  • the device has a flow baffle which is designed as a baffle plate or as a conically shaped plate.
  • an air-entrained mortar mixture is produced in a separate mixing room by introducing air under pressure.
  • the invention has for its object to provide a method of the type mentioned in the preamble of claim 1 and an apparatus for performing the method which, while avoiding the aforementioned difficulties and technical limits, the production of a homogeneous, pumpable and sprayable water / solid mortar mixture uniform high quality and without air pockets with the smallest possible construction volume and weight of the device.
  • a device for carrying out the method is characterized by the features a) to d) specified in the characterizing part of claim 2.
  • 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 around the 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 around the 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.
  • 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 into the solid under pressure in concentric jets.
  • 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) is arranged in the upper area of the mixing tube (1).
  • 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 connected to the rotor (18) of the pump (16) in a rotationally fixed manner via a coupling (17).
  • the solids feed opening (5) very advantageously has a collar (20) with a flange (21) for mounting 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 conveyance of a pumpable building material mixture, such as plastering mortar, containing water and hydraulically bindable solid in a homogeneous mixture.
  • a 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.

Claims (5)

  1. Procédé pour la préparation en continu et le transport simultané d'un mélange homogène d'un matériau de construction apte à être pompé, contenant de l'eau ainsi qu'un solide apte à assurer un lien hydraulique, tel que du mortier pour enduit, le solide et l'eau étant fournis dans une chambre de mélange, sensiblement dans la région centrale de son espace de mélange, avec dosage en continu des proportions mutuelles du mélange, et étant ensuite transportés sous la forme d'un écoulement massique en forme de tore, avec établissement d'une pression d'accumulation, pour être ainsi mélangés, au moyen d'une vis de mélange comportant des volutes hélicoïdales entourant un arbre, les inclusions d'air sortant du mélange ainsi obtenu, à contre-courant du gradient d'accumulation de pression et étant extraites hors de la chambre de mélange en un emplacement de l'espace de mélange qui est opposé à la direction du transport, caractérisé en ce que les solides sont introduits dans la chambre de mélange avec dosage volumétrique au moyen d'une écluse à roue cellulaire, et que l'eau est introduite dans la chambre de mélange sous pression, avec dosage volumétrique et par un grand nombre de jets de projection périphériques et concentriques, et en ce que,
       à l'extrémité du parcours de mélange, l'écoulement massique du mélange s'effectue autour d'une plaque de retenue concentrique, est introduit du côté introduction d'une pompe à matières denses à partir des régions périphériques de la chambre de mélange, et y est réalisé plus loin avec l'établissement d'une pression de pompage.
  2. Dispositif pour la préparation en continu et le transport simultané d'un mélange homogène d'un matériau de construction apte à être pompé, contenant de l'eau ainsi qu'un solide apte à assurer un lien hydraulique, tel que du mortier pour enduit, en vue de la réalisation du procédé selon la revendication 1, comprenant:
    un tube de mélange (1) à l'intérieur duquel sont disposés une vis de mélange (3) présentant des volutes hélicoïdales (4) entourant un arbre d'entraînement (2), comme organe de mélange, et
    à l'extrémité (8), située du côté de l'entraînement, de la vis de mélange (3), un organe de désaération (9) situé dans la région supérieure du tube de mélange (1), et
    l'arbre d'entraînement (2) de la vis de mélange (3) étant relié à rotation solidaire au rotor (18) de la pompe (16) à matières denses par l'intermédiaire d'un accouplement (17), caractérisé par les particularités:
    a) sensiblement à la moitié de la longueur du tube de mélange (1), est disposée une ouverture d'alimentation (5), avec à l'intérieur de celle-ci un dispositif de dosage (6) des matières solides qui comporte une écluse à roue cellulaire,
    b) à côté de l'ouverture d'alimentation (5), à l'intérieur du tube de mélange (1), on trouve un dispositif périphérique d'injection d'eau (7), lequel est un profité creux de forme annulaire, soudé de manière étanche à la paroi interne du tube de mélange (1) et présentant un grand nombre d'alésages d'injection (19) disséminés à la périphérie, présentant par exemple une section transversale en forme d'angle ou en forme de U ou en forme de demi-cercle,
    c) à l'extrémité (10) située du côté de la sortie, la vis de mélange (3) présente une plaque de retenue (11) qui laisse libre un interstice annulaire périphérique (13) entre la paroi interne du tube de mélange (1) et le bord externe (12) de la plaque de retenue (11);
    d) en remplacement d'au moins une partie de ses volutes hélicoïdales (4), la vis de mélange (3) est équipée d'aubes de mélange.
  3. Dispositif selon la revendication 2, caractérisé en ce que l'accouplement (17) entre l'arbre d'entraînement (2) et le rotor de la pompe (18) de la pompe (16) à matières denses est configuré comme accouplement élastique qui présente des organes intermédiaires d'accouplement réalisés en un matériau élastique tel que caoutchouc ou plastique.
  4. Dispositif selon les revendications 2 ou 3, caractérisé en ce que l'accouplement (17) est équipé d'une protection contre les surcharges, par exemple une protection (22) à boulon d'arrachement.
  5. Dispositif selon la revendication 2, caractérisé en ce que l'organe de désaération (9) est disposé sur le tube de mélange (11), dans la région sèche (23) de celui-ci.
EP93108255A 1992-06-19 1993-05-21 Fabrication et transport d'un mélange de matériaux de construction Expired - Lifetime EP0574728B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4219880A DE4219880C2 (de) 1992-06-19 1992-06-19 Vorrichtung zur kontinuierlichen Herstellung und simultanen Förderung eines Wasser sowie hydraulisch bindungsfähigen Feststoff in homogener Mischung enthaltenden pumpfähigen Baustoffgemisches wie Putzmörtel
DE4219880 1992-06-19

Publications (2)

Publication Number Publication Date
EP0574728A1 EP0574728A1 (fr) 1993-12-22
EP0574728B1 true EP0574728B1 (fr) 1997-04-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP93108255A Expired - Lifetime EP0574728B1 (fr) 1992-06-19 1993-05-21 Fabrication et transport d'un mélange de matériaux de construction

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EP (1) EP0574728B1 (fr)
AT (1) ATE151008T1 (fr)
DE (2) DE4219880C2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29804459U1 (de) * 1998-03-12 1998-08-13 Bug Betriebs & Grundbesitz Vorrichtung zur baustellenseitigen Herstellung von pumpfähigen Mörtelmassen
EP1000718A3 (fr) * 1998-11-05 2002-06-05 Wildgruber Baustoffwerke GmbH & Co. KG Mélangeur pour l'obtention d'un enduit pompable
CN1114473C (zh) * 2000-06-19 2003-07-16 乔辛姆·霍尔兹 制备固体－水混合物的装置和方法
CN102233614A (zh) * 2011-04-22 2011-11-09 三一重工股份有限公司 一种液体称重进料装置及包括其的混凝土生产设备
CH708983B1 (de) * 2013-12-10 2017-12-29 S&P Clever Reinforcement Company Ag Misch- und Förderanlage für eine Mörtelmischung.
CN107269002A (zh) * 2016-04-07 2017-10-20 中建四局第六建筑工程有限公司 一种高标号山砂混凝土超高泵送方法及装置
CN111350353B (zh) * 2020-04-07 2020-10-23 永康克卡自动化设备有限公司 一种每次传送固定质量的建筑送料机

Family Cites Families (13)

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DE1277819B (de) * 1965-05-12 1968-09-19 Karl Schlecht Dipl Ing Vorrichtung zum kontinuierlichen Mischen von pulverfoermigem bis feinkoernigem Schuettgut
DE1950910C3 (de) * 1969-10-09 1980-05-08 Beton- Und Monierbau Ag, 4000 Duesseldorf Verfahren zum selbsttätigen Regeln der Wasserzugabe bei der Betonherstellung und Vorrichtung zur Durchführung des Verfahrens
DE2129250A1 (de) * 1971-06-12 1973-01-04 Zyklos Metallbau Kg Mischmaschine zum herstellen von putzmassen
DE2218418A1 (de) * 1972-04-17 1973-10-31 Wilhelm Fleissner Misch- und spritzvorrichtung fuer plastisches und koerniges gut
DE2340246A1 (de) * 1973-08-09 1974-09-19 Karl Dipl-Ing Schlecht Kontinuierliche mischpumpe
AT346746B (de) * 1974-04-02 1978-11-27 Hellfried Kiwisch Ges M B H Vorrichtung zur kontinuierlichen herstellung einer spritzfaehigen masse aus einem trockenen, feinkoernigen gut und einer fluessigkeit
DE3041107C2 (de) * 1980-10-31 1985-01-31 Anton 8973 Hindelang Wachter Vorrichtung zum kontinuierlichen Anmachen von Mörtel
DE3242492C2 (de) * 1982-11-18 1985-10-10 P.F.T. Putz- und Fördertechnik GmbH, 8715 Iphofen Vorrichtung zum Erzeugen einer luftporenhaltigen Mischung eines Baustoffs mit Wasser
DE3421916A1 (de) * 1984-06-13 1985-12-19 Hasit Trockenmörtel GmbH & Co KG, 8050 Freising Vorrichtung fuer die herstellung von daemm-moertel
DE3809661C2 (de) * 1988-03-23 1999-02-18 Reburg Patentverwertungs Gmbh Vorrichtung zum kontinuierlichen Mischen eines Baustoffs
DE3914471C1 (en) * 1989-05-02 1990-07-26 Michael Glatt Maschinenbau Gmbh, 8423 Abensberg, De Line dosing device - includes advancing member, quenching vessel, line inlet and water supply point
DE9105027U1 (fr) * 1991-04-24 1991-09-19 Winkler, Hans, 7801 Bollschweil, De
DE9111754U1 (fr) * 1991-09-20 1991-11-28 Adolf A. Fleischmann Inh. Werner Fleischmann, 6000 Frankfurt, De

Also Published As

Publication number Publication date
ATE151008T1 (de) 1997-04-15
DE59306008D1 (de) 1997-05-07
DE4219880A1 (de) 1993-12-23
DE4219880C2 (de) 1996-07-18
EP0574728A1 (fr) 1993-12-22

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