EP1815906B1 - Mixer with stationary container in which the stirring assembly has a lid above the axis of rotation. - Google Patents

Mixer with stationary container in which the stirring assembly has a lid above the axis of rotation. Download PDF

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Publication number
EP1815906B1
EP1815906B1 EP07370002A EP07370002A EP1815906B1 EP 1815906 B1 EP1815906 B1 EP 1815906B1 EP 07370002 A EP07370002 A EP 07370002A EP 07370002 A EP07370002 A EP 07370002A EP 1815906 B1 EP1815906 B1 EP 1815906B1
Authority
EP
European Patent Office
Prior art keywords
vessel
kneading
rack
kneader
pan
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.)
Not-in-force
Application number
EP07370002A
Other languages
German (de)
French (fr)
Other versions
EP1815906A1 (en
Inventor
Christian c/o Couvrot SA Destombes
Eric c/o Couvrot SA Brunquet
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.)
COUVROT
Original Assignee
COUVROT
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Filing date
Publication date
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Priority to PL07370002T priority Critical patent/PL1815906T3/en
Publication of EP1815906A1 publication Critical patent/EP1815906A1/en
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Publication of EP1815906B1 publication Critical patent/EP1815906B1/en
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Classifications

    • 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
    • B28C5/16—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 the stirrers having motion about a vertical or steeply inclined axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/82—Pan-type mixers, i.e. mixers in which the stirring elements move along the bottom of a pan-shaped receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
    • B01F35/1452—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids
    • B01F35/1453—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids by means of jets of fluid, e.g. air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
    • B01F2035/35—Use of other general mechanical engineering elements in mixing devices
    • B01F2035/351—Sealings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/28—Mixing cement, mortar, clay, plaster or concrete ingredients
    • 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
    • B28C7/126—Supply means, e.g. nozzles

Definitions

  • the invention relates to a fixed bowl mixer, and will find a particular application for mixing wet or dry components, for example cement, silica sand or the like, to obtain concrete.
  • the document GB-A-2153696 exhibits a mixer of this type.
  • the fixed-tank mixers are in the form of a generally circular tank, inside which a mixing train provided with blades makes it possible to mix the components.
  • a drive unit housed in a casing adjacent to the upper wall of the vessel makes it possible to animate the kneading train with a complex rotational movement, in particular, epicyclic movement.
  • the train has for this purpose a first axis of rotation with a rotating shaft around which the train turns on itself relative to a rotating support, in particular constituted by a movable ring.
  • the second axis of rotation of the train is constituted by the axis of rotation of the rotating support, centered on the vessel.
  • the rotation shaft protrudes downwardly from the upper wall of the tank and inside the latter.
  • the rotation shaft is held by a hub projecting into the tank.
  • the hub is fixed, integral with said rotating support.
  • the lower end of the rotation shaft has a support for the arms of the kneading train.
  • An anti-projection plate is provided integral with the rotation shaft, and located between the arm support and the hub. Its function is to protect the hub against splashing of products, especially pulverulent materials, and liquids.
  • the present invention aims to overcome these disadvantages by providing a fixed bowl mixer for easy cleaning particularly after use.
  • Another object of the present invention is to provide a mixer whose mechanical members, including drive, are subject to a good protection vis-à-vis the dust and liquid projections.
  • Another object of the invention is to provide a mixer whose vessel height can be reduced without loss of performance or capacity.
  • the invention relates to a mixer with a fixed bowl, in particular for mixing wet or dry components, for example cement, silica sand or others, to obtain concrete, of a type generally. known today.
  • the figures 1 and 3 illustrate the assembly of the kneading train to the drive device of a kneader of the prior art.
  • the driving device 30 ' is housed in a casing adjacent to the upper wall 11' of the tank 2 '.
  • the shaft is held by a hub 10 'secured to the upper wall 11' projecting downwardly into the vessel 2 '.
  • An arm support 50 is secured to the lower end of the shaft 9 'of the kneader 3'.
  • the kneading train also has an anti-splash plate 60 in particular secured and rotating with said shaft in order to protect the hub 10 'from splashing during the stirring of the components by the kneading train.
  • the tank has a height h 1 at least equal to the sum of the height h m , separating the arm support from the bottom of the tank, plus the length of the hub 10 '.
  • the hub 10 ' is secured to the upper wall 11' in particular rotatably mounted relative to the rest of the tank, integral with a movable ring 7 'driven by the output gear 22' of a gear motor 23 '.
  • the kneading train 3 has, in addition, a pan 13 secured to said rotation shaft 9 and rotating with it, said pan 13 forming a sealed cover intended to cover said shaft and its hub in the tank in order to protect.
  • the pan 13 protects the hub 10 against liquids such as water and especially powdery products. It is also a tray for receiving grease and other lubricants.
  • the mixer 1 according to the invention may be equipped with one or more nozzles 70, fixed relative to the tank 2, for the projection of a liquid under pressure.
  • These nozzles 70 are designed for cleaning the mixing train 3, including pan 13, when the train 3 is driven in a rotational movement, in particular for cleaning the agglomerated powdery materials.
  • the sealed pot rotating on itself is thus easily cleaned.
  • the hub 10 of the rotation shaft 9 of the kneading train 3 is constituted by a tubular element 40 having a shoulder 41 at one of its ends for attachment to one of the inner walls, in particular upper 11 of the tank 2.
  • the internal diameter of the hub 10 forms a cage for receiving one or more bearings 42 intended to guide said rotary shaft 9.
  • a shutter 43 of ring shape provides a first seal between the rotation shaft 9 and the hub 10 at its low end.
  • the tank 2 has a bottom wall, a side wall and an upper wall covering, at least in part, the bottom wall.
  • the mixing train 3 protrudes downwardly from the upper wall 11, in particular constituted by a turntable, for stirring the components contained in the tank 2.
  • the pan 13 can then constitute a support for the arm or arms 4 of the kneading train 3.
  • the or the arms 4 of the kneading train 3 are secured radially on the side wall 14 of the pan 13 above the level of the lower end of the rotation shaft 9. This arrangement makes it possible to secure the upper end of the arms 4 around the hub 10 and the rotation shaft 9 and thus reduce the height "h 2 " of the vessel, in particular lower than the height "h 1 " kneading tanks of the state of the art.
  • the mixing train may have a plurality of arms distributed in star, in particular four in number and positioned at 90 ° relative to each other.
  • the upper free edge of the pan 13 and one of the inner walls of the tank 2, in particular upper11, are connected by means of a rotary joint 15.
  • the rotary joint 15 is more particularly illustrated. to the figure 5 .
  • the rotary joint 15 is constituted by a rim element 16 disposed around the rotation shaft 9 and fixed on one of the internal walls, in particular upper 11 of the tank 2, and for example constituted by a turntable.
  • Said rim element 16 has a circular inner shoulder 17 designed to cooperate intimately, in rotation, with an outer circular shoulder 18 of the free upper edge of the pan 13 so as to form a baffle 19 for the fluids.
  • said rim element 16 can be made by the shoulder 41 of the hub 10.
  • the rotary joint 15 furthermore has a tubular flexible gasket 20 forming a lip and whose inner diameter covers said baffle 19.
  • the tank 2 of the kneader may be cylindrical, said kneading train 3 being eccentric with respect to the axis of symmetry 6 of the tank.
  • the drive device makes it possible to animate the kneading train 3 in particular with a complex epicyclic rotation movement.
  • the driving device may consist of a ring gear 7 and a toothed wheel 8.
  • the ring gear 7 is rotatable and able to serve as a support for the kneading train 3 for rotating said train in the tank 2, said at least one kneading train 3 being mounted free to rotate on itself, directly or indirectly on said ring 7.
  • the wheel 8 is fixed and provided coaxial with said ring 7, the kneading train 3 having a pinion receiver 12 which meshes around said wheel, the torque thus received from the pinion causing a drive in rotation on itself of the kneading train 3.
  • the crown 7 can be driven by an output gear 22 of a gear motor 23.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Accessories For Mixers (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

The mixer (1) with a fixed drum (2) for materials to be mixed, such as cement and sand, has a mixing assembly (3) driven by a motor and reduction gear (23) and comprising a rotary shaft (9) and at least one arm (4) with mixing blades (5). It differs by having a sealed cover inside the drum (13) to protect the end of the shaft (9) and its hub (10). The drum is also equipped with a series of fixed nozzles (70) for spraying a liquid under pressure to clean the mixing assembly, including the shaft end cover (13) as it is rotated. The hub (10) is in the form of a tube (40) with a shoulder (41) at one end for fixing to the inner wall of the drum, and an interior containing bearings (42) to guide the rotary shaft.

Description

L'invention est relative à un malaxeur à cuve fixe, et trouvera une application particulière pour le mélange des composants humides ou secs, par exemple ciment, sable de silice ou autres, pour l'obtention de béton.The invention relates to a fixed bowl mixer, and will find a particular application for mixing wet or dry components, for example cement, silica sand or the like, to obtain concrete.

Le document GB-A-2153696 expose un malaxeur de ce type.The document GB-A-2153696 exhibits a mixer of this type.

Les malaxeurs à cuve fixe se présentent sous la forme d'une cuve généralement circulaire, à l'intérieur de laquelle un train de malaxage muni de pales permet le brassage des composants.The fixed-tank mixers are in the form of a generally circular tank, inside which a mixing train provided with blades makes it possible to mix the components.

Un dispositif d'entraînement logé dans un carter adjacent à la paroi supérieure de la cuve permet d'animer le train de malaxage d'un mouvement de rotation complexe, notamment, épicycloïdal.A drive unit housed in a casing adjacent to the upper wall of the vessel makes it possible to animate the kneading train with a complex rotational movement, in particular, epicyclic movement.

Le train présente à cet effet un premier axe de rotation avec un arbre de rotation autour duquel le train tourne sur lui-même par rapport à un support tournant, notamment constitué par une couronne mobile. Le deuxième axe de rotation du train est constitué par l'axe de rotation du support tournant, centré sur la cuve.The train has for this purpose a first axis of rotation with a rotating shaft around which the train turns on itself relative to a rotating support, in particular constituted by a movable ring. The second axis of rotation of the train is constituted by the axis of rotation of the rotating support, centered on the vessel.

De manière connue, l'arbre de rotation fait saillie vers le bas à partir de la paroi supérieure de la cuve et à l'intérieur de cette dernière. L'arbre de rotation est maintenu par un moyeu projetant dans la cuve. Le moyeu est fixe, solidaire par rapport audit support tournant.In known manner, the rotation shaft protrudes downwardly from the upper wall of the tank and inside the latter. The rotation shaft is held by a hub projecting into the tank. The hub is fixed, integral with said rotating support.

L'extrémité basse de l'arbre de rotation présente un support pour les bras du train de malaxage. Une plaque anti projection est prévue solidaire à l'arbre de rotation, et située entre le support de bras et le moyeu. Elle a pour fonction de protéger le moyeu contre les projections de produits, notamment des matières pulvérulentes, et des liquides.The lower end of the rotation shaft has a support for the arms of the kneading train. An anti-projection plate is provided integral with the rotation shaft, and located between the arm support and the hub. Its function is to protect the hub against splashing of products, especially pulverulent materials, and liquids.

Toutefois, ce montage du train de malaxage au dispositif d'entraînement présente trois inconvénients majeurs, à savoir :

  • Malgré la présence de la plaque anti projection, le moyeu doit être nettoyé par l'intermédiaire de buses par la pulvérisation d'eau sous pression. Contrairement au train de malaxage qui peut tourner sur lui-même et être ainsi aisément nettoyé, le moyeu est fixe par rapport au support tournant. Plusieurs buses réparties autour du moyeu doivent donc être utilisées pour traiter toute la circonférence du moyeu et obtenir un résultat satisfaisant.
  • Le dispositif d'entraînement du malaxeur, à savoir l'arbre de rotation et le moyeu doivent être fortement graissés, ces différents organes étant soumis à une forte corrosion lors des opérations de malaxage, notamment de composants humides. Il a été constaté que le montage actuel entre le moyeu et l'arbre de rotation laisse s'échapper de la graisse par gravité qui tombe ensuite dans la cuve et les produits.
  • L'extrémité supérieure des bras du train de malaxage est assujettie à un support de bras à l'extrémité inférieure de l'arbre de rotation. Le support de bras ne devant pas être en contact avec les produits, il est impérativement positionné à une hauteur « hm » minimale par rapport au fond de la cuve. Du fait du montage actuel du train au dispositif d'entraînement, la paroi supérieure de la cuve doit être positionnée à une hauteur qui ne peut être inférieure à la somme de la hauteur hm et de la longueur du moyeu projetant dans la cuve.
However, this mounting of the kneading train to the drive device has three major drawbacks, namely:
  • Despite the presence of the anti-splash plate, the hub must be cleaned via nozzles by the pressurized water spray. Unlike the mixing train which can turn on itself and thus be easily cleaned, the hub is fixed relative to the rotating support. Several nozzles distributed around the hub must therefore be used to treat the entire circumference of the hub and obtain a satisfactory result.
  • The drive device of the mixer, namely the rotation shaft and the hub must be heavily greased, these various bodies being subjected to strong corrosion during kneading operations, including wet components. It has been found that the current assembly between the hub and the rotating shaft allows gravity to escape from the grease which then falls into the tank and the products.
  • The upper end of the arms of the kneading train is secured to an arm support at the lower end of the rotation shaft. Since the arm support must not be in contact with the products, it is imperatively positioned at a minimum height "h m " with respect to the bottom of the tank. Due to the current assembly of the train to the drive device, the upper wall of the tank must be positioned at a height that can not be less than the sum of the height h m and the length of the hub projecting into the tank.

La présente invention a pour but de remédier à ces inconvénients en proposant un malaxeur à cuve fixe permettant un nettoyage aisé notamment après utilisation.The present invention aims to overcome these disadvantages by providing a fixed bowl mixer for easy cleaning particularly after use.

Un autre but de la présente invention est de proposer un malaxeur dont les organes mécaniques, notamment d'entraînement, fassent l'objet d'une bonne protection vis-à-vis des poussières et des projections de liquide.Another object of the present invention is to provide a mixer whose mechanical members, including drive, are subject to a good protection vis-à-vis the dust and liquid projections.

Un autre but de l'invention est de proposer un malaxeur dont la hauteur de cuve peut être réduite sans perte de performance, ni de capacité.Another object of the invention is to provide a mixer whose vessel height can be reduced without loss of performance or capacity.

D'autres buts et avantages de la présente invention apparaîtront au cours de la description qui va suivre qui n'est donnée qu'à titre indicatif et qui n'a pas pour but de la limiter.Other objects and advantages of the present invention will become apparent from the following description which is given for information only and which is not intended to limit it.

L'invention concerne un malaxeur à cuve fixe, notamment destiné au mélange de composants humides ou secs, par exemple, ciment, sable de silice ou autres, pour l'obtention de béton comprenant :

  • une cuve fixe dans laquelle sont introduits les différents composants à malaxer,
  • au moins un train de malaxage présentant un arbre de rotation et au moins un bras muni de pales, destiné à brasser les composants de mélange présents dans la cuve, le train de malaxage étant entraîné en rotation simple ou complexe par un dispositif d'entraînement,
  • ledit arbre de rotation et son moyeu faisant saillie au moins en partie à l'intérieur de la cuve, l'entrée de l'arbre coopérant avec le dispositif d'entraînement, la sortie de l'arbre étant solidaire, directement ou indirectement dudit au moins un bras,
caractérisé en ce que le train de malaxage présente, en outre, une casserole solidaire dudit arbre de rotation et tournant avec lui, ladite casserole, formant un capot étanche, destinée à recouvrir ledit arbre et son moyeu dans la cuve afin de les protéger.The invention relates to a mixer with a fixed bowl, in particular for mixing wet or dry components, for example cement, silica sand or the like, for obtaining concrete comprising:
  • a fixed vessel into which the various components to be kneaded are introduced,
  • at least one kneading train having a rotation shaft and at least one arm provided with blades, for stirring the mixing components present in the tank, the kneading train being driven in simple or complex rotation by a driving device,
  • said rotation shaft and its hub protruding at least partly inside the tank, the input of the shaft cooperating with the drive device, the output of the shaft being secured, directly or indirectly from said to least one arm,
characterized in that the kneading train further has a pan integral with said rotating shaft and rotating with it, said pan, forming a sealed cover, for covering said shaft and its hub in the tank to protect them.

L'invention sera mieux comprise à la lecture de la description suivante, accompagnée des dessins en annexe, parmi lesquels :

  • la figure 1 est une vue selon une coupe verticale d'un malaxeur à cuve fixe de l'art antérieur,
  • la figure 1A est une vue selon la coupe horizontale A-A du train de malaxage tel qu'illustré à la figure 1,
  • la figure 2 est une vue selon une coupe verticale du malaxeur à cuve fixe conforme à l'invention,
  • la figure 2A est une vue selon la coupe A-A telle qu'illustrée à la figure 2,
  • la figure 3 est une vue partielle droite du malaxeur de l'art antérieur tel qu'illustré à la figure 1,
  • la figure 4 est une vue partielle droite du malaxeur conforme à l'invention tel qu'illustré à la figure 2,
  • la figure 5 est une vue agrandie du cadre V du joint tournant tel qu'illustré à la figure 4.
The invention will be better understood on reading the following description, accompanied by the appended drawings, among which:
  • the figure 1 is a view in a vertical section of a fixed bowl mixer of the prior art,
  • the Figure 1A is a view along the horizontal section AA of the kneading train as illustrated in FIG. figure 1 ,
  • the figure 2 is a view in a vertical section of the fixed bowl mixer according to the invention,
  • the Figure 2A is a view in section AA as illustrated in figure 2 ,
  • the figure 3 is a partial right view of the kneader of the prior art as illustrated in FIG. figure 1 ,
  • the figure 4 is a partial partial view of the mixer according to the invention as illustrated in FIG. figure 2 ,
  • the figure 5 is an enlarged view of the V-frame of the rotary joint as shown in FIG. figure 4 .

L'invention est relative à un malaxeur à cuve fixe, notamment destiné au mélange de composants humides ou secs, par exemple ciment, sable de silice ou autres, pour l'obtention de béton, d'un type globalement connu aujourd'hui.The invention relates to a mixer with a fixed bowl, in particular for mixing wet or dry components, for example cement, silica sand or others, to obtain concrete, of a type generally. known today.

Les figures 1 et 3 illustrent le montage du train de malaxage au dispositif d'entraînement d'un malaxeur de l'art antérieur. Tel qu'illustré, le dispositif d'entraînement 30' est logé dans un carter adjacent à la paroi supérieure 11' de la cuve 2'. L'arbre est maintenu par un moyeu 10' assujetti à la paroi supérieure 11' faisant saillie vers le bas à l'intérieur de la cuve 2'.The figures 1 and 3 illustrate the assembly of the kneading train to the drive device of a kneader of the prior art. As illustrated, the driving device 30 'is housed in a casing adjacent to the upper wall 11' of the tank 2 '. The shaft is held by a hub 10 'secured to the upper wall 11' projecting downwardly into the vessel 2 '.

Un support de bras 50 est assujetti à l'extrémité basse de l'arbre 9' du train de malaxage 3'. Le train de malaxage présente en outre une plaque anti projection 60 notamment assujettie et tournante avec ledit arbre afin de protéger le moyeu 10' des projections lors du brassage des composants par le train de malaxage.An arm support 50 is secured to the lower end of the shaft 9 'of the kneader 3'. The kneading train also has an anti-splash plate 60 in particular secured and rotating with said shaft in order to protect the hub 10 'from splashing during the stirring of the components by the kneading train.

Dans ce cas, la cuve présente une hauteur h1 au moins égale à la somme de la hauteur hm, séparant le support de bras du fond de la cuve, plus la longueur du moyeu 10'. Le moyeu 10' est assujetti à la paroi supérieure 11' notamment montée tournante par rapport au reste de la cuve, solidaire d'une couronne mobile 7' entraînée par le pignon de sortie 22' d'un moto réducteur 23'.In this case, the tank has a height h 1 at least equal to the sum of the height h m , separating the arm support from the bottom of the tank, plus the length of the hub 10 '. The hub 10 'is secured to the upper wall 11' in particular rotatably mounted relative to the rest of the tank, integral with a movable ring 7 'driven by the output gear 22' of a gear motor 23 '.

Telle qu'illustrée aux figures 2 et 4 notamment, la présente invention concerne un malaxeur 1 à cuve fixe, notamment destiné au mélange de composants humides ou secs, par exemple, sable de silice ou autres, pour l'obtention de béton comprenant :

  • une cuve fixe 2 dans laquelle sont introduits les différents composants à malaxer,
  • au moins un train de malaxage 3 présentant un arbre de rotation 9 et au moins un bras 4 muni de pales 5, destiné à brasser les composants de mélange présents dans la cuve 2, le train de malaxage 3 étant entraîné en rotation simple ou complexe par un dispositif d'entraînement 30,
  • ledit arbre de rotation 9 et son moyeu 10 faisant saillie au moins en partie à l'intérieur de la cuve 2, l'entrée de l'arbre 9 coopérant avec le dispositif d'entraînement 30, la sortie de l'arbre 9 étant solidaire, directement ou indirectement, dudit au moins un bras 4.
As illustrated in figures 2 and 4 in particular, the present invention relates to a mixer 1 with a fixed bowl, in particular for mixing wet or dry components, for example, silica sand or the like, for obtaining concrete comprising:
  • a fixed tank 2 into which the various components to be kneaded are introduced,
  • at least one kneading train 3 having a rotation shaft 9 and at least one arm 4 provided with blades 5, for stirring the mixing components present in the tank 2, the kneading train 3 being driven in simple or complex rotation by a drive device 30,
  • said rotation shaft 9 and its hub 10 projecting at least partly inside the tank 2, the input of the shaft 9 cooperating with the drive device 30, the output of the shaft 9 being secured to , directly or indirectly, of said at least one arm 4.

Selon l'invention, le train de malaxage 3 présente, en outre, une casserole 13 solidaire dudit arbre de rotation 9 et tournant avec lui, ladite casserole 13 formant un capot étanche destiné à recouvrir ledit arbre et son moyeu dans la cuve afin de les protéger.According to the invention, the kneading train 3 has, in addition, a pan 13 secured to said rotation shaft 9 and rotating with it, said pan 13 forming a sealed cover intended to cover said shaft and its hub in the tank in order to protect.

Telle qu'illustrée à la figure 4, la casserole 13 permet de protéger le moyeu 10 contre les liquides tels que l'eau et notamment les produits pulvérulents. Elle constitue également un bac de réception de graisse et autres lubrifiants.As illustrated in figure 4 , the pan 13 protects the hub 10 against liquids such as water and especially powdery products. It is also a tray for receiving grease and other lubricants.

Le malaxeur 1 conforme à l'invention peut être équipé d'une ou plusieurs buses 70, fixes par rapport à la cuve 2, pour la projection d'un liquide sous pression. Ces buses 70 sont conçues pour le nettoyage du train de malaxage 3, casserole 13 comprise, lorsque le train 3 est animé d'un mouvement de rotation, notamment pour le nettoyage des matières pulvérulentes agglomérées. La casserole étanche tournant sur elle-même est ainsi aisément nettoyée.The mixer 1 according to the invention may be equipped with one or more nozzles 70, fixed relative to the tank 2, for the projection of a liquid under pressure. These nozzles 70 are designed for cleaning the mixing train 3, including pan 13, when the train 3 is driven in a rotational movement, in particular for cleaning the agglomerated powdery materials. The sealed pot rotating on itself is thus easily cleaned.

Tel qu'illustré aux figures 4 et 5, le moyeu 10 de l'arbre de rotation 9 du train de malaxage 3 est constitué par un élément tubulaire 40 présentant un épaulement 41 au niveau de l'une de ses extrémités pour la fixation sur l'une des parois internes, notamment supérieures 11 de la cuve 2.As illustrated in Figures 4 and 5 , the hub 10 of the rotation shaft 9 of the kneading train 3 is constituted by a tubular element 40 having a shoulder 41 at one of its ends for attachment to one of the inner walls, in particular upper 11 of the tank 2.

Le diamètre interne du moyeu 10 forme une cage pour la réception d'un ou plusieurs roulements 42 destinés à assurer le guidage dudit arbre de rotation 9. Un obturateur 43 de forme en anneau vient assurer une première étanchéité entre l'arbre de rotation 9 et le moyeu 10 à son extrémité basse.The internal diameter of the hub 10 forms a cage for receiving one or more bearings 42 intended to guide said rotary shaft 9. A shutter 43 of ring shape provides a first seal between the rotation shaft 9 and the hub 10 at its low end.

Telle qu'illustrée à la figure 2 notamment, la cuve 2 présente une paroi de fond, une paroi latérale et une paroi supérieure recouvrant, au moins en partie, la paroi de fond. Le train de malaxage 3 fait saillie vers le bas à partir de la paroi supérieure 11, notamment constitué par un plateau tournant, pour venir brasser les composants contenus dans la cuve 2.As illustrated in figure 2 in particular, the tank 2 has a bottom wall, a side wall and an upper wall covering, at least in part, the bottom wall. The mixing train 3 protrudes downwardly from the upper wall 11, in particular constituted by a turntable, for stirring the components contained in the tank 2.

La casserole 13 peut alors constituer un support pour le ou les bras 4 du train de malaxage 3. Selon un mode de réalisation avantageux, le ou les bras 4 du train de malaxage 3 sont assujettis radialement sur la paroi latérale 14 de la casserole 13 au-dessus du niveau de l'extrémité inférieure de l'arbre de rotation 9. Cette disposition permet d'assujettir l'extrémité supérieure des bras 4 autour du moyeu 10 et de l'arbre de rotation 9 et ainsi de réduire la hauteur « h2 » de la cuve, notamment inférieure à la hauteur « h1» des cuves de malaxage de l'état de la technique.The pan 13 can then constitute a support for the arm or arms 4 of the kneading train 3. According to an advantageous embodiment, the or the arms 4 of the kneading train 3 are secured radially on the side wall 14 of the pan 13 above the level of the lower end of the rotation shaft 9. This arrangement makes it possible to secure the upper end of the arms 4 around the hub 10 and the rotation shaft 9 and thus reduce the height "h 2 " of the vessel, in particular lower than the height "h 1 " kneading tanks of the state of the art.

Tel qu'illustré à la figure 2A, le train de malaxage peut présenter plusieurs bras répartis en étoile notamment au nombre de quatre et positionnés à 90° l'un par rapport à l'autre.As illustrated in Figure 2A , the mixing train may have a plurality of arms distributed in star, in particular four in number and positioned at 90 ° relative to each other.

Selon un mode de réalisation, le bord libre supérieur de la casserole 13 et l'une des parois internes de la cuve 2, notamment supérieure11, sont liés par l'intermédiaire d'un joint tournant 15. Le joint tournant 15 est plus particulièrement illustré à la figure 5.According to one embodiment, the upper free edge of the pan 13 and one of the inner walls of the tank 2, in particular upper11, are connected by means of a rotary joint 15. The rotary joint 15 is more particularly illustrated. to the figure 5 .

Selon un mode de réalisation, le joint tournant 15 est constitué par un élément jante 16 disposé autour de l'arbre de rotation 9 et fixé sur l'une des parois internes, notamment supérieure 11 de la cuve 2, et par exemple constituée par un plateau tournant.According to one embodiment, the rotary joint 15 is constituted by a rim element 16 disposed around the rotation shaft 9 and fixed on one of the internal walls, in particular upper 11 of the tank 2, and for example constituted by a turntable.

Ledit élément jante 16 présente un épaulement intérieur circulaire 17 prévu pour coopérer intimement, en rotation, avec un épaulement circulaire extérieur 18 du bord supérieur libre de la casserole 13 de telle façon à constituer une chicane 19 pour les fluides. Selon un mode de réalisation, ledit élément jante 16 peut être réalisé par l'épaulement 41 du moyeu 10.Said rim element 16 has a circular inner shoulder 17 designed to cooperate intimately, in rotation, with an outer circular shoulder 18 of the free upper edge of the pan 13 so as to form a baffle 19 for the fluids. According to one embodiment, said rim element 16 can be made by the shoulder 41 of the hub 10.

Le joint tournant 15 présente en outre un joint souple tubulaire 20 formant une lèvre et dont le diamètre interne vient recouvrir ladite chicane 19.The rotary joint 15 furthermore has a tubular flexible gasket 20 forming a lip and whose inner diameter covers said baffle 19.

La cuve 2 du malaxeur peut être cylindrique, ledit train de malaxage 3 étant excentré par rapport à l'axe de symétrie 6 de la cuve. Le dispositif d'entraînement permet d'animer le train de malaxage 3 notamment d'un mouvement de rotation complexe, épicycloïdal.The tank 2 of the kneader may be cylindrical, said kneading train 3 being eccentric with respect to the axis of symmetry 6 of the tank. The drive device makes it possible to animate the kneading train 3 in particular with a complex epicyclic rotation movement.

Le dispositif d'entraînement peut être constitué par une couronne dentée 7 et une roue dentée 8.The driving device may consist of a ring gear 7 and a toothed wheel 8.

La couronne 7 est mobile en rotation et apte à servir de support au train de malaxage 3 pour la mise en rotation dudit train dans la cuve 2, ledit au moins un train de malaxage 3 étant monté libre en rotation sur lui-même, directement ou indirectement sur ladite couronne 7.The ring gear 7 is rotatable and able to serve as a support for the kneading train 3 for rotating said train in the tank 2, said at least one kneading train 3 being mounted free to rotate on itself, directly or indirectly on said ring 7.

La roue 8 est fixe et prévue coaxiale à ladite couronne 7, le train de malaxage 3 présentant un pignon récepteur 12 qui vient engrener autour de ladite roue, le couple ainsi reçu du pignon provoquant un entraînement en rotation sur lui-même du train de malaxage 3.The wheel 8 is fixed and provided coaxial with said ring 7, the kneading train 3 having a pinion receiver 12 which meshes around said wheel, the torque thus received from the pinion causing a drive in rotation on itself of the kneading train 3.

Telle qu'illustrée, la couronne 7 peut être entraînée par un pignon de sortie 22 d'un moto réducteur 23.As illustrated, the crown 7 can be driven by an output gear 22 of a gear motor 23.

Naturellement, d'autres modes de mise en oeuvre, à la portée de l'homme de l'art, auraient pu encore être envisagés sans pour autant sortir du cadre de l'invention.Of course, other modes of implementation, within the reach of those skilled in the art, could still be envisaged without departing from the scope of the invention.

Claims (11)

  1. A kneader (1) with a fixed vessel, in particular intended for the mixture of humid or dry components, for instance cement or silica sand, for obtaining concrete, comprising :
    - a fixed vessel (2) wherein are inserted the different components to be kneaded,
    - at least one kneading rack (3) exhibiting a rotary shaft (9) and at least one arm (4) fitted with blades (5), intended for stirring the mixture components present in the vessel (2), the kneading rack (3) being driven into simple or complex rotation by a driving device (30),
    - said rotary shaft (9) and its hub (10) protruding at least partially inside the vessel (2), the inlet of the shaft (9) co-operating with the driving device (30), the outlet of the shaft (9) being interconnected, directly or indirectly, of said at least one arm (4),
    characterised in that the kneading rack (3) exhibits, moreover, a pan (13) interconnected with said rotary shaft (9) and revolving therewith, said pan (13) forming a waterproof cover intended for covering said shaft (9) and its hub (10) in the vessel (2) in order to protect them.
  2. A kneader (1) according to claim 1, wherein the kneader (1) exhibits one or several nozzles (70) fixed relative to the vessel (2), for the projection of a pressurised liquid, and designed for cleaning the kneading rack (3), pan (13) included, when said rack is driven by a rotational movement, in particular for cleaning agglomerated pulverulent matters.
  3. A kneader (1) according to claim 1 or 2, wherein the hub (10) of the rotary shaft (9) of the kneading rack (3) is formed by a tubular element (40) exhibiting a shoulder (41) at one of its ends for the fastening thereof to one of the internal walls of the vessel (2) and whereof the internal diameter forms a cage for the reception of one or several bearings (42) intended for ensuring the guiding of said rotary shaft (9).
  4. A kneader (1) according to any of the claims 1 to 3, wherein the vessel (2) exhibits a bottom wall, at least one lateral wall and an upper wall covering, at least partially, the bottom wall, the kneading rack (3) protruding downwards from the upper wall for stirring the components contained in the vessel (2).
  5. A kneader according to claim 4, wherein the pan (13) forms a bracket for the arm(s) (4) of the kneading rack (3).
  6. A kneader according to claim 5, wherein the arm(s) (4) of the kneading rack (3) are slaved radially on the lateral wall (14) of the pan (13) above the level of the lower end of the rotary shaft (9).
  7. A kneader according to claim 5, wherein the kneading rack (3) exhibits several arms (4) star-distributed.
  8. A kneader according to any of the claims 1 to 7, wherein the upper free edge of the pan (13) and one of the internal walls of the vessel (2) are associated by means of a revolving seal (15).
  9. A kneader according to claim 8, wherein the revolving seal (15) is formed by a rim element (16) arranged around the rotary shaft (9) and fixed to one of the internal walls of the vessel (2), said rim assembly (16) exhibiting a circular inner shoulder (17) provided for co-operating tightly rotatably with an outer circular shoulder (18) of the upper free edge of said pan (13) so as to provide a baffle plate (19) for fluids.
  10. A kneader according to claim 9, wherein the revolving seal (15) exhibits a flexible tubular seal (20) whereof the internal diameter covers said baffle plate (19).
  11. A kneader (1) according to any of the claims 1 to 10, wherein the vessel is cylindrical, said kneading rack (3) being off-centred relative to the axis of symmetry (6) of the vessel, wherein the driving device enables to drive the kneading rack (3) with a complex, epicycloid rotational movement, and wherein:
    - the driving device is formed by a toothed ring (7) and a toothed wheel (8),
    - the ring (7) is mobile rotatably and capable to act as a support for the kneading rack (3) for putting said rack into rotation, in the vessel (2), said at least one kneading rack (3) being mounted freely rotatably around itself, directly or indirectly, on said ring (7),
    - said wheel (8) is fixed and provided coaxial to said ring (7) the kneading rack (3) exhibiting a receiving pinion (12) which meshes around said wheel, the torque thus received from the pinion causing the kneading rack (3) to rotate around itself.
EP07370002A 2006-02-01 2007-01-25 Mixer with stationary container in which the stirring assembly has a lid above the axis of rotation. Not-in-force EP1815906B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07370002T PL1815906T3 (en) 2006-02-01 2007-01-25 Mixer with stationary container in which the stirring assembly has a lid above the axis of rotation.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0600919A FR2896706B1 (en) 2006-02-01 2006-02-01 FIXED TANK MIXER INCLUDING THE MIXING TRAIN HAS A SOLIDARITY PAN ABOVE THE ROTATION TREE.

Publications (2)

Publication Number Publication Date
EP1815906A1 EP1815906A1 (en) 2007-08-08
EP1815906B1 true EP1815906B1 (en) 2008-04-09

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Application Number Title Priority Date Filing Date
EP07370002A Not-in-force EP1815906B1 (en) 2006-02-01 2007-01-25 Mixer with stationary container in which the stirring assembly has a lid above the axis of rotation.

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EP (1) EP1815906B1 (en)
AT (1) ATE391550T1 (en)
DE (1) DE602007000010T2 (en)
ES (1) ES2306447T3 (en)
FR (1) FR2896706B1 (en)
PL (1) PL1815906T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPG20130015A1 (en) * 2013-04-15 2014-10-16 Officine Galletti Omg Srl MIXING SHOVEL
CN106983395A (en) * 2017-04-14 2017-07-28 深圳市捷耐电器有限公司 Stirring container rotation is revolved round the sun eggbeater again
CN107557206A (en) * 2017-09-07 2018-01-09 重庆市红槽坊酒业有限公司 One kind production wine is with without dead angle spice equipment
CN108657422A (en) * 2018-04-07 2018-10-16 曾浩 A kind of automatic dispensation apparatus of unmanned plane
CN111645192B (en) * 2020-06-23 2021-04-02 广西东林尧它建材科技有限公司 A agitated vessel for building concrete mixing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069145A (en) * 1959-10-26 1962-12-18 Bernhard V Fejmert Machine for mixing different kinds of materials
GB2027353B (en) * 1978-08-02 1982-09-29 Fejmert B Concrete mixers
US4506984A (en) * 1983-06-09 1985-03-26 Mixer Systems, Inc. Pan type mixing machine
GB2153696B (en) * 1984-02-10 1987-08-05 Croker Ltd Improvements in mixing machines
DE3405385A1 (en) * 1984-02-15 1985-08-22 Stetter Gmbh, 8940 Memmingen Annular-trough forced mixer
DE19611303C2 (en) * 1996-03-22 1998-07-02 Verschleis Technik Dr Ing Hans Ring trough mixer

Also Published As

Publication number Publication date
DE602007000010T2 (en) 2009-05-14
PL1815906T3 (en) 2008-09-30
ATE391550T1 (en) 2008-04-15
DE602007000010D1 (en) 2008-05-21
FR2896706A1 (en) 2007-08-03
ES2306447T3 (en) 2008-11-01
FR2896706B1 (en) 2008-04-04
EP1815906A1 (en) 2007-08-08

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