EP2265362B1 - Blender assembly and method for producing a preparation using said assembly - Google Patents

Blender assembly and method for producing a preparation using said assembly Download PDF

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Publication number
EP2265362B1
EP2265362B1 EP09726774A EP09726774A EP2265362B1 EP 2265362 B1 EP2265362 B1 EP 2265362B1 EP 09726774 A EP09726774 A EP 09726774A EP 09726774 A EP09726774 A EP 09726774A EP 2265362 B1 EP2265362 B1 EP 2265362B1
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EP
European Patent Office
Prior art keywords
rotor
assembly according
annular ring
mixing
mixture
Prior art date
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Active
Application number
EP09726774A
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German (de)
French (fr)
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EP2265362A1 (en
Inventor
José CHEIO DE OLIVEIRA
Henri Daheron
Pascal Ricard
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VMI SA
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VMI SA
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Publication of EP2265362A1 publication Critical patent/EP2265362A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/41—Emulsifying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/53—Mixing liquids with solids using driven stirrers
    • 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
    • B01F27/81—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow
    • B01F27/812—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis the stirrers having central axial inflow and substantially radial outflow the stirrers co-operating with surrounding stators, or with intermeshing stators, e.g. comprising slits, orifices or screens
    • 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
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • 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
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7176—Feed mechanisms characterised by the means for feeding the components to the mixer using pumps
    • 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
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/718—Feed mechanisms characterised by the means for feeding the components to the mixer using vacuum, under pressure in a closed receptacle or circuit system
    • 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
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71805—Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings
    • 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
    • B01F35/75—Discharge mechanisms
    • B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
    • B01F35/7547—Discharge mechanisms characterised by the means for discharging the components from the mixer using valves, gates, orifices or openings
    • 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
    • B01F2101/06—Mixing of food ingredients
    • 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
    • B01F2101/21—Mixing of ingredients for cosmetic or perfume compositions
    • 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
    • B01F2101/22—Mixing of ingredients for pharmaceutical or medical compositions

Definitions

  • the invention relates to a mixing assembly comprising a mixing device, a method of manufacturing a preparation.
  • This mixing assembly is particularly intended for the manufacture of a preparation, and more particularly for the dispersion of particles in a preparation.
  • Such preparations are commonly manufactured for pharmaceutical, cosmetic or agri-food applications.
  • the incorporated particles may in particular constitute the active ingredient of the composition and must then be incorporated into the mixture in very precise proportions.
  • mixing sets are known. According to the most widespread technology, these comprise a tank, maintained under vacuum and intended to receive the mixture, and a mixing device comprising a rotor comprising mixing blades and cooperating with motor means in order to be rotated. and a stator comprising an annular ring surrounding the rotor and having radial orifices for the passage of the mixture radially projected by said rotor.
  • Such mixing devices are known in particular from EP0801974A1 , DE8006977U1 , EP1475143A1 , US 6866411 B1 and US 2002/0110539 A1 .
  • the particles are introduced by suction into the tank maintained under vacuum via a supply duct opening at the bottom of the tank, laterally to the rotor-stator unit.
  • the supply duct is equipped with a valve for controlling the introduction of the particles into the tank.
  • the particles to be incorporated in the mixture circulate in the tank approximately following the path of the arrows f 1.
  • the rate of introduction of the powder is directly related to the level of vacuum in the tank.
  • a too high vacuum level causes the particles to pass through the mixture too quickly and the particles sucked up against the upper part of the tank; which generates problems of cleaning and product loss.
  • the mixing set is equipped with an external piping allowing a re circulation of the preparation.
  • the powder particles are introduced into the tank via a supply duct opening into the outer pipework.
  • this method poses problems of cleaning the external circulation piping.
  • the rate of introduction of the powder is limited by the dimensions of the external piping and by the flow rate of circulation therein.
  • the invention aims to improve these devices of the prior art by proposing a mixing assembly for effectively dispersing particles in a mixture, to introduce said particles with a high flow rate and to reduce product losses, and whose cleaning is easy.
  • the powder particles are dispersed efficiently because the introduction of the particles is directly carried out in the turbulence zone.
  • the rate of introduction of the powders may be greater because it is possible to increase the level of vacuum in such an assembly without the particles being projected against the upper part of the tank.
  • the mixing assembly does not require an external circulation tube whose cleaning is difficult.
  • mixture assembly according to the invention makes it possible to reduce the time necessary to completely incorporate particles into the preparation.
  • the mixing device of the assembly according to the invention comprises a motor block comprising the rotor, the annular ring gear, motor means and a shaft connecting the rotor to the drive means and said engine block supports at least a portion of the supply duct.
  • the mixing device is compact and its installation on a mixing set is simple.
  • the supply duct is equipped with a valve supported by the engine block.
  • the valve is preferably a pneumatic valve with a valve.
  • the engine block comprises means for fixing to a mixing tank in order to facilitate the installation of the device on the tank of the mixing unit.
  • the fixing means are pressure-tight in order to allow the mixing tank equipped with such a mixing device to be depressurized.
  • the supply duct passes through said fixing means to a tank.
  • the tank equipped with such a mixing device has only one passage for the installation of the rotor, the annular ring and the supply duct.
  • the engine block comprises two coaxial rotors. This embodiment makes it possible to further reduce the production time of the preparation.
  • the rotor (s) comprise (s) mixing blades arranged to suck the mixture through the axial orifice of the annular ring and project it radially through the radial orifices of the ring. annular crown.
  • the supply conduit opens near the radial end of the mixing blades of the rotor.
  • the introduction of the particles into the tank is favored by the radial movement of the mixture.
  • the invention relates to a method of manufacturing a preparation comprising a mixing step by means of an assembly according to the above, and further comprising a step of introducing particles into said tank maintained in depression, via the interior of said annular ring, at the base of the rotor / annular ring system to incorporate the particles into the mixture.
  • At least two immiscible substances are mixed in order to manufacture an emulsion.
  • the figure 3 schematically illustrates a mixture assembly, according to the invention.
  • This assembly comprises a tank 1, a mixing device 14, inlet means 9 and means 10 for evacuating the fluids.
  • At least two fluids intended to be mixed in the tank 1 are conveyed by the arrival means 9, pass through the tank 1 and are evacuated by the evacuation means 10.
  • the means of arrival 9 and evacuation 10 comprise each a fluid passage pipe and a valve 12, 13 for regulating the flow of arrival and evacuation.
  • the mixing assembly is equipped with means, such as a pump 11, for evacuating the inside of the tank 1.
  • means such as a pump 11, for evacuating the inside of the tank 1.
  • the depression prevailing inside the tank may extend between 0 and 0.99 bar.
  • the mixing device according to the invention comprises a rotor 2 which rotates inside an annular ring 5.
  • the rotor 2 cooperates with motor means 4 in order to be rotated and comprises mixing blades 3a, 3b, 3c, 3d arranged to suck the mixture axially and project it radially through the rotor 2.
  • the rotor 2 is connected to the motor means 4 by a shaft 16 and comprises, for this purpose, a cylindrical bore 17 (see figures 7 and 8 ) for connecting the end of the shaft 16 to the rotor 2.
  • the mixing device further comprises an annular ring 5 surrounding the rotor 2.
  • the annular ring 5 may be fixed, and in this case will be called rotor, or mobile in rotation (not shown).
  • the ring 5 has an upper axial orifice 18 allowing the mixture sucked in by the rotor 2 to pass.
  • the annular ring 5 comprises, on its periphery, orifices 6 for the passage of the mixture radially projected by said rotor 2.
  • the orifices radial 6 are slots parallel to each other and are separated by parts serving as an impact surface.
  • the mixture projected by the rotor 2, through the openings 6, in the radial direction undergoes shear in this radial direction.
  • the gap between the rotor 2 and the annular ring 5 is sufficiently small so as to obtain the desired shear stresses.
  • the mixing assembly may comprise one or more turbines, not shown, arranged inside the vessel 1 and arranged to cause mixing , in the direction of the arrows f2, towards the axis of the rotor 2.
  • the mixing device is embodied in the form of a motor unit, comprising the motor means 4, the shaft 16, the rotor 2, the annular ring 5 and a casing 18 for accommodating the shaft 16.
  • the device comprises a duct 7 for supplying the particles into the tank 1.
  • the supply duct 7 opens directly into the annular ring 5.
  • Another end of the supply duct 7 is intended to be immersed in a particle reservoir so as to ensure the aspiration of the particles.
  • the introduction of the particles inside the tank 1 is ensured by the depression prevailing inside the tank 1 and a valve 8 equipping the supply duct 7 allows to regulate the rate of introduction of particles into the tank 1.
  • the supply duct 7 opens near the radial end of the blades 3a, 3b, 3c, 3d.
  • the introduction of the particles is encouraged by the radial projection of the mixture during the rotation of the rotor 2.
  • valve 8 is directly attached to the casing 18 of the engine block.
  • the valve 8 used is, for example, a pneumatic valve with a valve 23.
  • the annular ring 5 is supported by a circular plate 15.
  • This plate 15 is intended to be inserted into a central cavity of the tank 1.
  • the side wall of the plate 15 is equipped with a groove circular 19 and an O-ring housed in said circular groove 19. The seal ensures the tightness of the tank liquid and pressure.
  • the shaft 16 passes through a central bore formed in the plate 15 and is guided in rotation by guide bearings 20, 21 supported by the housing 18.
  • the housing 18 supports an O-ring 22 for sealing, with gas and liquids, the central bore of the plate 15.
  • the plate 15 comprises a particle feed port connected to the conduit 7 for feeding the particles.
  • the valve 23 of the valve 8 closes the passage between the supply duct and the supply port while in the open position, illustrated on the figure 7 the valve 23 of the valve 8 releases the passage space of the particles.
  • the valve 8 may be equipped with sensors making it possible to detect the position of the valve 23.
  • the engine block further comprises watertight fastening means to the tank 1, not shown, arranged between the rotor 2 and the supply duct 7.
  • the plate 15 is for example secured to the tank 1 by welding , or using screws inserted through orifices formed in the plate 15 and cooperating with orifices formed in the vessel 1.
  • the supply duct 7 passes through the fastening means.
  • the tank 1 has only one opening for the passage of the supply duct 7 of the rotor 2 and the annular ring 5.
  • the figure 8 illustrates a mixing device according to a second embodiment, comprising two coaxial rotors 2a, 2b for rotating in opposite directions.
  • the engine block comprises an outer shaft 16b rotatably mounted on the housing 18 by means of bearings 24 and cooperating with the outer rotor 2b, and an inner shaft 16a coaxial with the outer shaft 16b, guided in rotation on the outer shaft 16b by means of bearings 25 and cooperating with the central rotor 2a.
  • the two shafts 16a, 16b cooperate with motor means 4 so as to be driven in the opposite direction.
  • the rotational speed of the shafts 16a, 16b is of the order of 3000 revolutions / minute.
  • the tank 1 is kept under pressure by the pump 11.
  • valve 8 is moved to the open position, so that the particles coming from the supply duct 7 are sucked via the inside of the annular ring of the stator 5, inside the tank 1. valve 8 is then moved to its closed position when the desired amount of particles has been introduced.
  • the preparation is evacuated via the evacuation means 10.
  • two immiscible substances are mixed in order to obtain an emulsion.

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

L'invention concerne un ensemble de mélange comprenant un dispositif de mélange, un procédé de fabrication d'une préparation.The invention relates to a mixing assembly comprising a mixing device, a method of manufacturing a preparation.

Cet ensemble de mélange est notamment destiné à la fabrication d'une préparation, et plus particulièrement à la dispersion de particules dans une préparation.This mixing assembly is particularly intended for the manufacture of a preparation, and more particularly for the dispersion of particles in a preparation.

ÉTAT DE LA TECHNIQUESTATE OF THE ART

Dans l'art antérieur, il est connu de produire des préparations en mélangeant dans une cuve des substances et en introduisant dans la cuve des particules de poudre afin de les incorporer au mélange.In the prior art, it is known to produce preparations by mixing substances in a tank and introducing particles of powder into the tank in order to incorporate them into the mixture.

De telles préparations sont couramment fabriquées pour des applications pharmaceutiques, cosmétiques ou agro-alimentaires. Pour des applications pharmaceutiques ou cosmétiques, les particules incorporées peuvent notamment constituer le principe actif de la composition et doivent alors être incorporées au mélange dans des proportions très précises.Such preparations are commonly manufactured for pharmaceutical, cosmetic or agri-food applications. For pharmaceutical or cosmetic applications, the incorporated particles may in particular constitute the active ingredient of the composition and must then be incorporated into the mixture in very precise proportions.

Afin de réaliser ces préparations, des ensembles de mélange sont connus. Selon la technologie la plus répandue, ceux-ci comprennent une cuve, maintenue en dépression et destinée à recevoir le mélange, et un dispositif de mélange comprenant un rotor comportant des pales de mélange et coopérant avec des moyens moteurs afin d'être entraîné en rotation et un stator comportant une couronne annulaire entourant le rotor et présentant des orifices radiaux pour le passage du mélange projeté radialement par ledit rotor.In order to carry out these preparations, mixing sets are known. According to the most widespread technology, these comprise a tank, maintained under vacuum and intended to receive the mixture, and a mixing device comprising a rotor comprising mixing blades and cooperating with motor means in order to be rotated. and a stator comprising an annular ring surrounding the rotor and having radial orifices for the passage of the mixture radially projected by said rotor.

De tels dispositifs de mélange sont connus notamment de EP0801974A1 , DE8006977U1 , EP1475143A1 , US 6866411 B1 et US 2002/0110539 A1 .Such mixing devices are known in particular from EP0801974A1 , DE8006977U1 , EP1475143A1 , US 6866411 B1 and US 2002/0110539 A1 .

Afin d'incorporer les particules à la préparation, deux méthodes sont couramment utilisées.In order to incorporate the particles into the preparation, two methods are commonly used.

Selon une première méthode, illustrée sur la figure 1, les particules sont introduites par aspiration dans la cuve maintenue en dépression via un conduit d'amenée débouchant en fond de cuve, latéralement à l'unité rotor-stator. Le conduit d'amenée est équipé d'une vanne permettant de commander l'introduction des particules dans la cuve. Les particules à incorporer dans le mélange circulent dans la cuve en suivant approximativement le trajet des flèches f 1. Toutefois, dans ce cas, le débit d'introduction de la poudre est directement lié au niveau de vide dans la cuve. Aussi, pour une vanne donnée, il faut augmenter le vide pour augmenter le débit de particules introduites. Toutefois, selon la viscosité du mélange dans la cuve, un niveau de vide trop élevé engendre un passage trop rapide des particules au travers le mélange et les particules aspirées viennent se coller contre la partie supérieure de la cuve ; ce qui génère des problèmes de nettoyage et de perte de produit.According to a first method, illustrated on the figure 1 the particles are introduced by suction into the tank maintained under vacuum via a supply duct opening at the bottom of the tank, laterally to the rotor-stator unit. The supply duct is equipped with a valve for controlling the introduction of the particles into the tank. The particles to be incorporated in the mixture circulate in the tank approximately following the path of the arrows f 1. However, in this case, the rate of introduction of the powder is directly related to the level of vacuum in the tank. Also, for a given valve, it is necessary to increase the vacuum to increase the flow rate of introduced particles. However, depending on the viscosity of the mixture in the tank, a too high vacuum level causes the particles to pass through the mixture too quickly and the particles sucked up against the upper part of the tank; which generates problems of cleaning and product loss.

Selon une seconde méthode, illustrée sur la figure 2, l'ensemble de mélange est équipé d'une tuyauterie extérieure permettant une re circulation de la préparation. Dans cette réalisation, les particules de poudre sont introduites dans la cuve via un conduit d'amenée débouchant dans la tuyauterie extérieure. Toutefois, cette méthode pose des problèmes de nettoyage de la tuyauterie extérieure de re circulation. En outre, le débit d'introduction de la poudre est limité par les dimensions de la tuyauterie extérieure et par le débit de circulation dans celle-ci.According to a second method, illustrated on the figure 2 , the mixing set is equipped with an external piping allowing a re circulation of the preparation. In this embodiment, the powder particles are introduced into the tank via a supply duct opening into the outer pipework. However, this method poses problems of cleaning the external circulation piping. In addition, the rate of introduction of the powder is limited by the dimensions of the external piping and by the flow rate of circulation therein.

OBJET DE L'INVENTIONOBJECT OF THE INVENTION

L'invention vise à améliorer ces dispositifs de l'art antérieur en proposant un ensemble de mélange permettant de disperser efficacement des particules dans un mélange, d'introduire lesdites particules avec un débit élevé et de diminuer les pertes de produit, et dont le nettoyage est aisé.The invention aims to improve these devices of the prior art by proposing a mixing assembly for effectively dispersing particles in a mixture, to introduce said particles with a high flow rate and to reduce product losses, and whose cleaning is easy.

À cet effet, et selon un premier aspect, l'invention propose un ensemble de mélange comprenant :

  • une cuve,
  • des moyens pour faire le vide à l'intérieur de ladite cuve, et
  • un dispositif de mélange apte à générer une zone de turbulences et comprenant :
  • au moins un rotor destiné à coopérer avec des moyens moteurs afin d'être entraîné en rotation ; et
  • une couronne annulaire entourant le rotor et présentant au moins un orifice axial et des orifices radiaux pour le passage du mélange; et
  • un conduit d'amenée de particules destinées à être incorporées au mélange, débouchant à l'intérieur de ladite couronne annulaire à la base du système rotor couronne annulaire.
For this purpose, and according to a first aspect, the invention proposes a mixture assembly comprising:
  • a tank,
  • means for evacuating the interior of said tank, and
  • a mixing device adapted to generate a turbulence zone and comprising:
  • at least one rotor intended to cooperate with motor means in order to be rotated; and
  • an annular ring surrounding the rotor and having at least one axial orifice and radial orifices for the passage of the mixture; and
  • a particle supply duct intended to be incorporated into the mixture, opening inside said annular ring at the base of the annular ring rotor system.

Ainsi, les particules de poudre sont dispersées efficacement car l'introduction des particules est directement effectuée dans la zone de turbulences.Thus, the powder particles are dispersed efficiently because the introduction of the particles is directly carried out in the turbulence zone.

En outre, le débit d'introduction des poudres peut être plus important car il est possible d'augmenter le niveau de vide dans un tel ensemble sans pour autant que les particules soient projetées contre la partie supérieure de la cuve.In addition, the rate of introduction of the powders may be greater because it is possible to increase the level of vacuum in such an assembly without the particles being projected against the upper part of the tank.

Par ailleurs, l'ensemble de mélange ne nécessite pas de tube extérieur de re circulation dont le nettoyage est difficile.In addition, the mixing assembly does not require an external circulation tube whose cleaning is difficult.

Enfin, l'ensemble de mélange selon l'invention permet de diminuer le temps nécessaire pour incorporer complètement des particules dans la préparation.Finally, the mixture assembly according to the invention makes it possible to reduce the time necessary to completely incorporate particles into the preparation.

Avantageusement, le dispositif de mélange de l'ensemble selon l'invention comporte un bloc-moteur comportant le rotor, la couronne annulaire, des moyens moteurs et un arbre connectant le rotor aux moyens moteurs et ledit bloc-moteur supporte au moins une portion du conduit d'amenée.Advantageously, the mixing device of the assembly according to the invention comprises a motor block comprising the rotor, the annular ring gear, motor means and a shaft connecting the rotor to the drive means and said engine block supports at least a portion of the supply duct.

Ainsi, le dispositif de mélange est compact et son installation sur un ensemble de mélange est simple.Thus, the mixing device is compact and its installation on a mixing set is simple.

Avantageusement, le conduit d'amenée est équipé d'une vanne supportée par le bloc-moteur. La vanne est, de préférence, une vanne pneumatique à clapet.Advantageously, the supply duct is equipped with a valve supported by the engine block. The valve is preferably a pneumatic valve with a valve.

Dans un mode de réalisation, le bloc-moteur comprend des moyens de fixation à une cuve de mélange afin de faciliter l'installation du dispositif sur la cuve de l'ensemble de mélange. Les moyens de fixation sont étanches à la pression afin de permettre la mise en dépression de la cuve de mélange équipé d'un tel dispositif de mélange.In one embodiment, the engine block comprises means for fixing to a mixing tank in order to facilitate the installation of the device on the tank of the mixing unit. The fixing means are pressure-tight in order to allow the mixing tank equipped with such a mixing device to be depressurized.

Avantageusement, le conduit d'amenée traverse lesdits moyens de fixation à une cuve. Ainsi, la cuve équipée d'un tel dispositif de mélange ne présente qu'un seul passage pour l'installation du rotor, de la couronne annulaire et du conduit d'amenée.Advantageously, the supply duct passes through said fixing means to a tank. Thus, the tank equipped with such a mixing device has only one passage for the installation of the rotor, the annular ring and the supply duct.

Dans un mode de réalisation, le bloc-moteur comporte deux rotors coaxiaux. Ce mode de réalisation permet de diminuer davantage le temps de production de la préparation.In one embodiment, the engine block comprises two coaxial rotors. This embodiment makes it possible to further reduce the production time of the preparation.

Dans un mode de réalisation préférée, le(s) rotor(s) comporte(nt) des pales de mélange agencées pour aspirer le mélange au travers de l'orifice axial de la couronne annulaire et le projeter radialement au travers des orifices radiaux de la couronne annulaire.In a preferred embodiment, the rotor (s) comprise (s) mixing blades arranged to suck the mixture through the axial orifice of the annular ring and project it radially through the radial orifices of the ring. annular crown.

Avantageusement, le conduit d'amenée débouche à proximité de l'extrémité radiale des pales de mélange du rotor. Ainsi, l'introduction des particules dans la cuve est favorisée par le mouvement radial du mélange.Advantageously, the supply conduit opens near the radial end of the mixing blades of the rotor. Thus, the introduction of the particles into the tank is favored by the radial movement of the mixture.

Selon un deuxième aspect, l'invention concerne un procédé de fabrication d'une préparation comprenant une étape de mélange au moyen d'un ensemble conforme à ce qui précède, et comprenant en outre une étape d'introduction de particules dans ladite cuve maintenue en dépression, via l'intérieur de ladite couronne annulaire, à la base du système rotor/couronne annulaire afin d'incorporer les particules au mélange.According to a second aspect, the invention relates to a method of manufacturing a preparation comprising a mixing step by means of an assembly according to the above, and further comprising a step of introducing particles into said tank maintained in depression, via the interior of said annular ring, at the base of the rotor / annular ring system to incorporate the particles into the mixture.

Selon un mode de réalisation, on mélange au moins deux substances non-miscibles afin de fabriquer une émulsion.According to one embodiment, at least two immiscible substances are mixed in order to manufacture an emulsion.

BRÈVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres objets et avantages de l'invention apparaîtront au cours de la description qui suit, faite en référence aux dessins annexés, dans lesquels :

  • les figures 1 et 2 sont des vues schématiques illustrant des ensembles de mélange pour la production d'une émulsion selon l'art antérieur;
  • la figure 3 est une vue schématique d'un ensemble de mélange selon l'invention ;
  • la figure 4 est une vue schématique d'un rotor et d'une couronne annulaire ;
  • la figure 5 est une vue schématique en coupe radiale d'un dispositif de mélange ;
  • la figure 6 est une vue schématique en coupe radiale d'un dispositif de mélange comprenant deux rotors ;
  • la figure 7 est une vue schématique en coupe d'un dispositif de mélange, selon un premier mode de réalisation de l'invention, en fonctionnement ; les flèches représentant le mouvement du mélange à l'intérieur de la cuve ; et
  • la figure 8 est une vue schématique d'un dispositif de mélange selon un second mode de réalisation de l'invention.
Other objects and advantages of the invention will become apparent from the following description, made with reference to the appended drawings, in which:
  • the Figures 1 and 2 are schematic views illustrating mixing sets for the production of an emulsion according to the prior art;
  • the figure 3 is a schematic view of a mixture assembly according to the invention;
  • the figure 4 is a schematic view of a rotor and an annular ring;
  • the figure 5 is a schematic view in radial section of a mixing device;
  • the figure 6 is a schematic view in radial section of a mixing device comprising two rotors;
  • the figure 7 is a schematic sectional view of a mixing device, according to a first embodiment of the invention, in operation; the arrows representing the movement of the mixture inside the tank; and
  • the figure 8 is a schematic view of a mixing device according to a second embodiment of the invention.

EXEMPLE DE RÉALISATIONEXAMPLE OF REALIZATION

La figure 3 illustre schématiquement un ensemble de mélange, selon l'invention. Cet ensemble comprend une cuve 1, un dispositif de mélange 14, des moyens d'arrivée 9 et des moyens d'évacuation 10 des fluides.The figure 3 schematically illustrates a mixture assembly, according to the invention. This assembly comprises a tank 1, a mixing device 14, inlet means 9 and means 10 for evacuating the fluids.

Au moins deux fluides destinés à être mélangés dans la cuve 1 sont acheminés par les moyens d'arrivée 9, transitent dans la cuve 1 et sont évacués par les moyens d'évacuation 10. Les moyens d'arrivée 9 et d'évacuation 10 comportent chacun une canalisation de passage des fluides et une vanne 12, 13 permettant de réguler le débit d'arrivée et d'évacuation.At least two fluids intended to be mixed in the tank 1 are conveyed by the arrival means 9, pass through the tank 1 and are evacuated by the evacuation means 10. The means of arrival 9 and evacuation 10 comprise each a fluid passage pipe and a valve 12, 13 for regulating the flow of arrival and evacuation.

En outre, l'ensemble de mélange est équipé de moyens, tels qu'une pompe 11, permettant de faire le vide à l'intérieur de la cuve 1. En fonctionnement, la dépression régnant à l'intérieur de la cuve peut s'étendre entre 0 et 0,99 bar.In addition, the mixing assembly is equipped with means, such as a pump 11, for evacuating the inside of the tank 1. In operation, the depression prevailing inside the tank may extend between 0 and 0.99 bar.

Le dispositif de mélange selon l'invention comporte un rotor 2 qui tourne à l'intérieur d'une couronne annulaire 5.The mixing device according to the invention comprises a rotor 2 which rotates inside an annular ring 5.

Le rotor 2 coopère avec des moyens moteurs 4 afin d'être entraîné en rotation et comporte des pâles 3a, 3b, 3c, 3d de mélange agencés pour aspirer axialement le mélange et le projeter radialement au travers du rotor 2. Le rotor 2 est connecté aux moyens moteurs 4 par un arbre 16 et comporte, à cet effet, un alésage cylindrique 17 (voir figures 7 et 8) permettant de connecter l'extrémité de l'arbre 16 au rotor 2.The rotor 2 cooperates with motor means 4 in order to be rotated and comprises mixing blades 3a, 3b, 3c, 3d arranged to suck the mixture axially and project it radially through the rotor 2. The rotor 2 is connected to the motor means 4 by a shaft 16 and comprises, for this purpose, a cylindrical bore 17 (see figures 7 and 8 ) for connecting the end of the shaft 16 to the rotor 2.

Le dispositif de mélange comporte en outre une couronne annulaire 5 entourant le rotor 2. La couronne annulaire 5 peut être fixe, et sera dans ce cas appelée rotor, ou mobile en rotation (non représentée). La couronne 5 présente un orifice axial 18 supérieur permettant le passage du mélange aspiré par le rotor 2. En outre, la couronne annulaire 5 comporte, sur sa périphérie, des orifices 6 pour le passage du mélange projeté radialement par ledit rotor 2. Les orifices radiaux 6 sont des fentes parallèles entre elles et sont séparées par des parties servant de surface d'impact. Le mélange projeté par le rotor 2, à travers les ouvertures 6, selon la direction radiale subit un cisaillement selon cette direction radiale. Par ailleurs, l'interstice entre le rotor 2 et la couronne annulaire 5 est suffisamment faible de manière à obtenir les contraintes de cisaillement souhaitées.The mixing device further comprises an annular ring 5 surrounding the rotor 2. The annular ring 5 may be fixed, and in this case will be called rotor, or mobile in rotation (not shown). The ring 5 has an upper axial orifice 18 allowing the mixture sucked in by the rotor 2 to pass. In addition, the annular ring 5 comprises, on its periphery, orifices 6 for the passage of the mixture radially projected by said rotor 2. The orifices radial 6 are slots parallel to each other and are separated by parts serving as an impact surface. The mixture projected by the rotor 2, through the openings 6, in the radial direction undergoes shear in this radial direction. Moreover, the gap between the rotor 2 and the annular ring 5 is sufficiently small so as to obtain the desired shear stresses.

Conformément aux flèches de la figure 7, illustrant le mouvement du mélange dans la cuve 1, lorsque le rotor 2 est entraîné en rotation, le mélange est aspiré en direction axiale suivant les flèches f1 et projeté vers l'extérieur au travers de fentes radiales, suivant les flèches f2. Le mélange est ainsi forcé de s'écouler à travers les fentes de la couronne 5. Avantageusement, l'ensemble de mélange peut comprendre une ou plusieurs turbines, non représentées, disposées à l'intérieur de la cuve 1 et agencées pour entraîner le mélange, selon la direction des flèches f2, vers l'axe du rotor 2.In accordance with the arrows of the figure 7 , illustrating the movement of the mixture in the tank 1, when the rotor 2 is driven in rotation, the mixture is sucked in the axial direction along the arrows f1 and projected outwardly through radial slots, according to the arrows f2. The mixture is thus forced to flow through the slots of the crown 5. Advantageously, the mixing assembly may comprise one or more turbines, not shown, arranged inside the vessel 1 and arranged to cause mixing , in the direction of the arrows f2, towards the axis of the rotor 2.

Dans le mode de réalisation représenté sur les figures 7 et 8, le dispositif de mélange est réalisé sous la forme d'un bloc-moteur, comprenant les moyens moteurs 4, l'arbre 16, le rotor 2, la couronne annulaire 5 et un carter 18 permettant de loger l'arbre 16.In the embodiment shown on the figures 7 and 8 , the mixing device is embodied in the form of a motor unit, comprising the motor means 4, the shaft 16, the rotor 2, the annular ring 5 and a casing 18 for accommodating the shaft 16.

Le dispositif comporte un conduit d'amenée 7 des particules dans la cuve 1. Selon l'invention, afin de disperser efficacement les particules dans le mélange, le conduit d'amenée 7 débouche directement à l'intérieur de la couronne annulaire 5. L'autre extrémité du conduit d'amenée 7 est destinée à être plongée dans un réservoir de particules de manière à assurer l'aspiration des particules. L'introduction des particules à l'intérieur de la cuve 1 est assurée par la dépression régnant à l'intérieur de la cuve 1 et une vanne 8 équipant le conduit d'amenée 7 permet de réguler le débit d'introduction de particules dans la cuve 1. Avantageusement, le conduit d'amenée 7 débouche à proximité de l'extrémité radiale des pales 3a, 3b, 3c, 3d. Ainsi, l'introduction des particules est encouragée par la projection radiale du mélange lors de la rotation du rotor 2.The device comprises a duct 7 for supplying the particles into the tank 1. According to the invention, in order to effectively disperse the particles in the mixture, the supply duct 7 opens directly into the annular ring 5. L Another end of the supply duct 7 is intended to be immersed in a particle reservoir so as to ensure the aspiration of the particles. The introduction of the particles inside the tank 1 is ensured by the depression prevailing inside the tank 1 and a valve 8 equipping the supply duct 7 allows to regulate the rate of introduction of particles into the tank 1. Advantageously, the supply duct 7 opens near the radial end of the blades 3a, 3b, 3c, 3d. Thus, the introduction of the particles is encouraged by the radial projection of the mixture during the rotation of the rotor 2.

Dans les modes de réalisation représentés, la vanne 8 est directement fixée au carter 18 du bloc-moteur. La vanne 8 utilisée est par exemple une vanne pneumatique à clapet 23.In the embodiments shown, the valve 8 is directly attached to the casing 18 of the engine block. The valve 8 used is, for example, a pneumatic valve with a valve 23.

Dans le mode de réalisation détaillée sur la figure 7, la couronne annulaire 5 est supportée par un plateau circulaire 15. Ce plateau 15 est destiné à être inséré dans une cavité centrale de la cuve 1. Afin d'assurer l'étanchéité, la paroi latérale du plateau 15 est équipée d'une rainure circulaire 19 et d'un joint torique logé dans ladite rainure circulaire 19. Le joint permet d'assurer l'étanchéité de la cuve au liquide et à la pression.In the detailed embodiment on the figure 7 , the annular ring 5 is supported by a circular plate 15. This plate 15 is intended to be inserted into a central cavity of the tank 1. In order to seal, the side wall of the plate 15 is equipped with a groove circular 19 and an O-ring housed in said circular groove 19. The seal ensures the tightness of the tank liquid and pressure.

Afin de permettre la transmission du mouvement de rotation des moyens moteurs 4 vers le rotor 2, l'arbre 16 traverse un alésage central formé dans le plateau 15 et est guidé en rotation par des paliers de guidage 20, 21 supportés par le carter 18. En outre, le carter 18 supporte un joint torique 22 permettant d'étanchéifier, au gaz et aux liquides, l'alésage central du plateau 15.In order to allow the transmission of the rotational movement of the drive means 4 to the rotor 2, the shaft 16 passes through a central bore formed in the plate 15 and is guided in rotation by guide bearings 20, 21 supported by the housing 18. In addition, the housing 18 supports an O-ring 22 for sealing, with gas and liquids, the central bore of the plate 15.

Par ailleurs, le plateau 15 comporte un orifice d'amenée des particules relié au conduit 7 d'amenée des particules. En position fermée, le clapet 23 de la vanne 8 obture le passage entre le conduit d'amenée et l'orifice d'amenée alors qu'en position ouverte, illustrée sur la figure 7, le clapet 23 de la vanne 8 dégage l'espace de passage des particules. Dans un mode de réalisation avantageux de l'invention, la vanne 8 peut être équipée de capteurs permettant de détecter la position du clapet 23.Furthermore, the plate 15 comprises a particle feed port connected to the conduit 7 for feeding the particles. In the closed position, the valve 23 of the valve 8 closes the passage between the supply duct and the supply port while in the open position, illustrated on the figure 7 the valve 23 of the valve 8 releases the passage space of the particles. In an advantageous embodiment of the invention, the valve 8 may be equipped with sensors making it possible to detect the position of the valve 23.

Le bloc-moteur comporte en outre des moyens de fixation étanche à la cuve 1, non illustrés, disposés entre le rotor 2 et le conduit d'amenée 7. A cet effet, le plateau 15 est par exemple solidarisé à la cuve 1 par soudage, ou à l'aide de vis insérées au travers d'orifices formés dans le plateau 15 et coopérant avec des orifices formés dans la cuve 1.The engine block further comprises watertight fastening means to the tank 1, not shown, arranged between the rotor 2 and the supply duct 7. For this purpose, the plate 15 is for example secured to the tank 1 by welding , or using screws inserted through orifices formed in the plate 15 and cooperating with orifices formed in the vessel 1.

Le conduit d'amenée 7 traverse les moyens de fixation. Ainsi, la cuve 1 ne comporte qu'une seule ouverture pour le passage du conduit d'amenée 7 du rotor 2 et de la couronne annulaire 5.The supply duct 7 passes through the fastening means. Thus, the tank 1 has only one opening for the passage of the supply duct 7 of the rotor 2 and the annular ring 5.

La figure 8 illustre un dispositif de mélange selon un second mode de réalisation, comprenant deux rotors coaxiaux 2a, 2b destinés à tourner dans des sens opposés.The figure 8 illustrates a mixing device according to a second embodiment, comprising two coaxial rotors 2a, 2b for rotating in opposite directions.

À cet effet, le bloc-moteur comporte un arbre extérieur 16b monté en rotation sur le carter 18 au moyen de paliers 24 et coopérant avec le rotor extérieur 2b, et un arbre intérieur 16a coaxial à l'arbre extérieur 16b, guidé en rotation sur l'arbre extérieur 16b au moyen de paliers 25 et coopérant avec le rotor central 2a. Les deux arbres 16a, 16b coopèrent avec des moyens moteurs 4 de sorte à être entraînés en sens inverse. La vitesse de rotation des arbres 16a, 16b est de l'ordre de 3000 tours/minute.For this purpose, the engine block comprises an outer shaft 16b rotatably mounted on the housing 18 by means of bearings 24 and cooperating with the outer rotor 2b, and an inner shaft 16a coaxial with the outer shaft 16b, guided in rotation on the outer shaft 16b by means of bearings 25 and cooperating with the central rotor 2a. The two shafts 16a, 16b cooperate with motor means 4 so as to be driven in the opposite direction. The rotational speed of the shafts 16a, 16b is of the order of 3000 revolutions / minute.

Selon l'invention, afin de réaliser la préparation, on introduit au moins deux substances dans la cuve via les moyens d'arrivée 9 et l'on entraîne le(s) rotor(s) 2, 2a, 2b du dispositif de mélange. La cuve 1 est maintenue en dépression par la pompe 11.According to the invention, in order to carry out the preparation, at least two substances are introduced into the tank via the inlet means 9 and the rotor (s) 2, 2a, 2b of the mixing device are driven. The tank 1 is kept under pressure by the pump 11.

Par la suite, la vanne 8 est déplacée en position ouverte, de telle sorte que les particules provenant du conduit d'amenée 7 soient aspirées via l'intérieur de la couronne annulaire du stator 5, à l'intérieur de la cuve 1. La vanne 8 est ensuite déplacée vers sa position de fermeture lorsque la quantité de particules désirée à été introduite.Subsequently, the valve 8 is moved to the open position, so that the particles coming from the supply duct 7 are sucked via the inside of the annular ring of the stator 5, inside the tank 1. valve 8 is then moved to its closed position when the desired amount of particles has been introduced.

Lorsque les particules ont été intégrées la préparation, celle-ci est évacuée via les moyens d'évacuation 10.When the particles have been integrated, the preparation is evacuated via the evacuation means 10.

Dans un mode de réalisation particulier, on mélange deux substances non-miscibles afin d'obtenir une émulsion.In a particular embodiment, two immiscible substances are mixed in order to obtain an emulsion.

L'invention est décrite dans ce qui précède à titre d'exemple. Il est entendu que l'homme du métier est à même de réaliser différentes variantes de réalisation de l'invention sans pour autant sortir du cadre de l'invention.The invention is described in the foregoing by way of example. It is understood that the skilled person is able to achieve different embodiments of the invention without departing from the scope of the invention.

En particulier, on pourra notamment prévoir de former le conduit d'amenée 7 des particules à l'intérieur de l'arbre moteur 16.In particular, it will be possible in particular to provide the supply duct 7 of the particles inside the drive shaft 16.

Claims (15)

  1. A mixing assembly comprising:
    ■ a vessel (1),
    ■ means (11) for setting up a vacuum inside the said vessel, and
    ■ a mixing device (4) capable of generating a turbulence region and comprising:
    - at least one rotor (2) intended to cooperate with motor means (4) so that it can be driven in rotation; and
    - an annular ring (5) surrounding the rotor (2) and having at least one axial orifice and radial orifices (6) through which the mixture can pass;
    - a feed line (7) to feed particles intended to be incorporated in the mixture, which leads into the inside of the said annular ring (5) at the base of the rotor/annular ring system.
  2. The assembly according to claim 1, wherein the said mixing device (14) includes a motor unit which comprises motor means (4) and a shaft (16) connecting the rotor (2) to the motor means (4).
  3. The assembly according to claim 2, wherein the motor unit supports at least one portion of the feed line (7).
  4. The assembly according to one of claims 2 or 3 wherein the feed line (7) is equipped with a valve (8) supported by the motor unit.
  5. The assembly according to claim 4, wherein the valve (8) is a check valve (23).
  6. The assembly according to one of claims 4 or 5, wherein the valve (8) is a pneumatic valve.
  7. The assembly according to one of claims 2 to 6 wherein the motor unit comprise the rotor (2) and the annular ring (5).
  8. The assembly according to one of claims 2 to 7 wherein the said motor unit comprises means for securing to the said mixing vessel (1).
  9. The assembly according to claim 8 wherein the said securing means are pressure-tight.
  10. The assembly according to claim 8 or 9 wherein the said feed line (7) passes through the said means for securing to the said vessel (1).
  11. The assembly according to one of claims 2 to 10 wherein the motor unit comprises two coaxial rotors (2a, 2b).
  12. The assembly according to any of the preceding claims wherein the rotor (2) comprises mixing impellers (3a, 3b, 3c, 3d) arranged to aspirate the mixture through the axial orifice of the annular ring (5) and to spray it radially through the radial orifices (6) of the annular ring (5).
  13. The assembly according to claim 12 wherein the feed line (7) leads into the vicinity of the radial end of the mixing impellers (3a, 3b, 3c, 3d) of the rotor (2).
  14. A method for manufacturing a preparation, comprising a mixing step by means of an assembly conforming to any of the preceding claims, further comprising a step to add particles by aspiration to the said vessel (1) held in a vacuum, via the inside of the said annular ring (5) at the base of the rotor/annular ring system, for incorporation of the particles into the mixture.
  15. The method according to claim 14, wherein at least two non-miscible substances are mixed to manufacture an emulsion.
EP09726774A 2008-03-31 2009-02-11 Blender assembly and method for producing a preparation using said assembly Active EP2265362B1 (en)

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FR0801761A FR2929133B1 (en) 2008-03-31 2008-03-31 MIXING DEVICE COMPRISING A CONDUIT OF PARTICLE MECHANISM DEBOUCHING IN THE TURBULENCE AREA
PCT/FR2009/000151 WO2009122021A1 (en) 2008-03-31 2009-02-11 Blender assembly and method for producing a preparation using said assembly

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EP (1) EP2265362B1 (en)
CA (1) CA2717460A1 (en)
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FR2929133A1 (en) 2009-10-02
CA2717460A1 (en) 2009-10-08
US8960993B2 (en) 2015-02-24
US20110026358A1 (en) 2011-02-03
EP2265362A1 (en) 2010-12-29
WO2009122021A1 (en) 2009-10-08
ES2401411T3 (en) 2013-04-19
FR2929133B1 (en) 2010-12-10

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