EP1449576A1 - Stirring device with axial propeller and lateral blades - Google Patents

Stirring device with axial propeller and lateral blades Download PDF

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Publication number
EP1449576A1
EP1449576A1 EP04290355A EP04290355A EP1449576A1 EP 1449576 A1 EP1449576 A1 EP 1449576A1 EP 04290355 A EP04290355 A EP 04290355A EP 04290355 A EP04290355 A EP 04290355A EP 1449576 A1 EP1449576 A1 EP 1449576A1
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EP
European Patent Office
Prior art keywords
blades
central shaft
rods
rod
tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04290355A
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German (de)
French (fr)
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EP1449576B1 (en
Inventor
Pascal Thomas
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Goavec Engineering
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Goavec Engineering
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Publication of EP1449576A1 publication Critical patent/EP1449576A1/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
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/113—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
    • 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • B01F27/1145—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections ribbon shaped with an open space between the helical ribbon flight and the rotating 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/191—Stirrers with two or more mixing elements mounted in sequence on the same axis with similar elements
    • 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
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements

Definitions

  • the present invention relates to a device for agitating a liquid, pasty or particulate product contained in a tank comprising a cylindrical side wall, this device comprising a central shaft arranged coaxially with the side wall of the tank and provided at its lower end with a set of blades angularly equidistant.
  • Agitation devices of this type are arranged in tanks intended to receive products to be homogenized or brewed before being marketed and / or used.
  • the present invention proposes to provide a solution to this problem and, to do so, it has as its object a device agitation having the structure indicated in the first paragraph above, this device being characterized in that it comprises in addition to at least one inclined blade extending near the wall side of the tank and twisted evenly from one to the other of its ends, this blade having a length representing approximately 20 to 100% of the circumference of the side wall of the tank.
  • the product is subjected to an action of mixing in addition to that of the blades and is therefore better homogenized.
  • the device according to the invention comprises two blades arranged symmetrically with respect to to the central tree and each having a length representing approximately 10 to 50% of the circumference of the side wall of the tank
  • the product contained in the tank can thus be subjected to a more vigorous mixing, which further improves its homogenization.
  • each of the blades are preferably connected by first and second rods, respectively to the tree central and to one of the blades.
  • the stirring device is in this case very solid and can easily withstand stresses during rotation often that the product exerts on it.
  • the middle part of each of the blades can also be connected to the central tree by a third rod.
  • the second rods can also be located in the extension of each other, just like the third rods.
  • the stirring device according to the invention comprises a second set of blades angularly equidistant, this second set being fixed on the tree, approximately at the height of the upper ends of the two blades.
  • the stirring device according to this embodiment can advantageously be used in a deep tank in which the product to be homogenized extends over a significant height.
  • each of the blades is connected to one of the blades of the first assembly by a first rod, while the upper end of each of these blades is connected to one of the blades of the second set by a second rod.
  • each of the blades can be connected to the central shaft by a third rod, the third rods extending radially and being located in the extension one from the other.
  • the device stirring according to the invention comprises two other blades arranged symmetrically with respect to the central tree and each having a length representing approximately 10 to 50% of the circumference of the side wall of the tank, the lower end of these other blades being connected to one of the blades of the second set by a fourth rod while the upper end of these others blades is connected to the central shaft by a fifth rod.
  • the middle part of each of said other blades can be connected to the central shaft by a sixth stem.
  • the fifth rods can be located in the extension of each other, as do the sixth rods.
  • the stirring device according to the invention is characterized by further in that its blades are of rectangular section and are twisted so that the long sides of the section of their lower end extend radially, while the large sides of the section of their upper terminal part form an acute angle with the direction of the central shaft.
  • the blades subject the product, during rotation of the stirring device, at a radial movement towards the shaft as well as a movement ascending.
  • the stirring device according to the invention is particularly effective for homogenizing a large quantity of product placed in a large diameter tank.
  • the stirring device visible in Figures 1 and 2 first comprises a vertical shaft 1 arranged along the axis longitudinal of a cylindrical tank 2 intended to contain the product to be homogenized.
  • the shaft 1 is connected at the level of its upper end to a not shown drive member located outside the tank and intended to drive it in rotation in the direction of arrow F.
  • the stirring device also includes three blades 4 attached to the lower end of the shaft 1, these blades being equidistant angularly and shaped to move the product contained in the tank, vertically downwards when the shaft is rotated in the direction of arrow F.
  • It also comprises two inclined blades 5 extending to near the side wall 3 of the tank and twisted evenly along their entire length.
  • the blades 5 are arranged symmetrically with respect to the tree 1 and have a length which corresponds to approximately 40 to 50% of the circumference of the side wall 3.
  • the lower ends of the blades 5 are each connected to a pale 4 via a first rod 6 extending horizontally.
  • the upper ends of these blades are further connected each to shaft 1 via a second rod horizontal 7.
  • the second rods 7 are located in the extension of one another and fixed on the shaft 1 by through a cylindrical sleeve 8.
  • each of the blades 5 is connected to the shaft 1 via a third rod horizontal 9.
  • the third rods 9 are located in the extension of one another and fixed on the shaft by means of another cylindrical sleeve 10.
  • the blades 5 are formed by flat sections rectangular and are twisted regularly over their entire length, their twist being such that the long sides of the section of their lower terminal part extend radially, and therefore horizontally, while the long sides of the section of their upper end form a acute angle ⁇ with the direction of the tree.
  • the blades 5 move the product contained in the tank 2 radially towards inside and vertically upward when the tree is rotated in the direction of arrow F.
  • the combined action of the blades 4 and the blades 5 ensures a intense mixing of the product and therefore allows homogenization of the latter.
  • the stirring device shown in Figure 3 differs of the one just described in that it comprises three blades 11 fixed on the shaft 1, approximately at the height of the upper ends of the blades 5.
  • the blades 11 are angularly equidistant and ensure the same function as the blades 4 of the stirring device shown in Figures 1 and 2.
  • the second rods 7 of the embodiment visible in FIGS. 1 and 2 have been replaced by two rods 12 each connecting a blade 11 to the upper end of a blade 5.
  • stirring device shown in Figure 4 differs from that visible in FIG. 3 in that it comprises two additional blades 13 identical to blades 5 of device visible in Figures 1 and 2.
  • the lower end of the blades 13 is connected to one of the blades 11 by a fourth rod 14.
  • the upper end and the middle part of these blades are further connected to the shaft 1, respectively by a fifth rod 15 and a sixth rod 16.
  • rods 14, 15 and 16 correspond respectively to rods 6, 7 and 9 of the first embodiment and exercise the same functions as these.
  • terminal parts upper and lower blades 13 are oriented as the upper and lower end portions of the blades 5, i.e. as shown in Figures 5 and 6.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

A mixer for a product in a container (2) with a cylindrical side wall comprises a central shaft (1) positioned coaxially with the container wall and having an assembly of evenly-spaced paddles (4) on its lower end, and one or more inclined blades (5). The blades are set close to the cylindrical wall of the container, run in uniform spirals between their upper and lower ends, and have a length equivalent to 20-100% of the container's circumference. The mixer can have, e.g. two symmetrical spiral blades, each with a length equivalent to 10-50% of the container's circumference and having their upper and lower ends connected to the shaft and paddles by rods (6, 7). Additional rods (9) connect the middle of the blades to the shaft, and the upper and middle rods are positioned radially.

Description

La présente invention concerne un dispositif pour agiter un produit liquide, pâteux ou particulaire contenu dans une cuve comportant une paroi latérale cylindrique, ce dispositif comprenant un arbre central disposé coaxialement avec la paroi latérale de la cuve et pourvu à son extrémité inférieure d'un ensemble de pales équidistantes angulairement.The present invention relates to a device for agitating a liquid, pasty or particulate product contained in a tank comprising a cylindrical side wall, this device comprising a central shaft arranged coaxially with the side wall of the tank and provided at its lower end with a set of blades angularly equidistant.

Les dispositifs d'agitation de ce type sont disposés dans des cuves destinées à recevoir des produits devant être homogénéisés ou brassés avant d'être commercialisés et/ou utilisés.Agitation devices of this type are arranged in tanks intended to receive products to be homogenized or brewed before being marketed and / or used.

Il arrive cependant que ces dispositifs n'assurent qu'une action imparfaite sur les produits, en particulier lorsque ces derniers sont introduits en grande quantité dans des cuves de grande contenance.However, these devices sometimes only provide imperfect action on products, especially when these the latter are introduced in large quantities into large tanks capacity.

La présente invention se propose d'apporter une solution à ce problème et, pour se faire, elle a pour objet un dispositif d'agitation ayant la structure indiquée au premier paragraphe ci-dessus, ce dispositif étant caractérisé en ce qu'il comprend en outre au moins une lame inclinée s'étendant à proximité de la paroi latérale de la cuve et vrillée uniformément de l'une à l'autre de ses extrémités, cette lame ayant une longueur représentant environ 20 à 100 % de la circonférence de la paroi latérale de la cuve.The present invention proposes to provide a solution to this problem and, to do so, it has as its object a device agitation having the structure indicated in the first paragraph above, this device being characterized in that it comprises in addition to at least one inclined blade extending near the wall side of the tank and twisted evenly from one to the other of its ends, this blade having a length representing approximately 20 to 100% of the circumference of the side wall of the tank.

Grâce à cette lame, le produit est soumis à une action de brassage s'ajoutant à celle des pales et est par conséquent mieux homogénéisé.Thanks to this blade, the product is subjected to an action of mixing in addition to that of the blades and is therefore better homogenized.

Selon un mode de réalisation préféré, le dispositif selon l'invention comprend deux lames disposées symétriquement par rapport à l'arbre central et ayant chacune une longueur représentant environ 10 à 50 % de la circonférence de la paroi latérale de la cuveAccording to a preferred embodiment, the device according to the invention comprises two blades arranged symmetrically with respect to to the central tree and each having a length representing approximately 10 to 50% of the circumference of the side wall of the tank

Le produit contenu dans la cuve peut ainsi être soumis à un brassage plus vigoureux, ce qui améliore encore son homogénéisation.The product contained in the tank can thus be subjected to a more vigorous mixing, which further improves its homogenization.

Dans le mode de réalisation ci-dessus, les extrémités inférieure et supérieure de chacune des lames sont de préférence reliées par des première et deuxième tiges, respectivement à l'arbre central et à l'une des pales.In the above embodiment, the ends lower and upper of each of the blades are preferably connected by first and second rods, respectively to the tree central and to one of the blades.

Le dispositif d'agitation est dans ce cas très solide et peut résister sans problème, pendant sa rotation, aux contraintes souvent élevées que le produit exerce sur lui. The stirring device is in this case very solid and can easily withstand stresses during rotation often that the product exerts on it.

Afin d'augmenter encore la solidité du dispositif d'agitation, la partie médiane de chacune des lames peut également être reliée à l'arbre central par une troisième tige.In order to further increase the strength of the stirring device, the middle part of each of the blades can also be connected to the central tree by a third rod.

Les deuxièmes tiges peuvent en outre être situées dans le prolongement l'une de l'autre, tout comme les troisièmes tiges.The second rods can also be located in the extension of each other, just like the third rods.

Selon un autre mode de réalisation, le dispositif d'agitation selon l'invention comprend un deuxième ensemble de pales équidistantes angulairement, ce deuxième ensemble étant fixé sur l'arbre, approximativement à la hauteur des extrémités supérieures des deux lames.According to another embodiment, the stirring device according to the invention comprises a second set of blades angularly equidistant, this second set being fixed on the tree, approximately at the height of the upper ends of the two blades.

Le dispositif d'agitation selon ce mode de réalisation peut avantageusement être utilisé dans une cuve profonde dans laquelle le produit à homogénéiser s'étend sur une hauteur importante.The stirring device according to this embodiment can advantageously be used in a deep tank in which the product to be homogenized extends over a significant height.

De préférence, l'extrémité inférieure de chacune des lames est reliée à l'une des pales du premier ensemble par une première tige, tandis que l'extrémité supérieure de chacune de ces lames est reliée à l'une des pales du deuxième ensemble par une deuxième tige.Preferably, the lower end of each of the blades is connected to one of the blades of the first assembly by a first rod, while the upper end of each of these blades is connected to one of the blades of the second set by a second rod.

En outre, la partie médiane de chacune des lames peut être reliée à l'arbre central par une troisième tige, les troisièmes tiges s'étendant radialement et étant situées dans le prolongement l'une de l'autre.In addition, the middle part of each of the blades can be connected to the central shaft by a third rod, the third rods extending radially and being located in the extension one from the other.

Selon un troisième mode de réalisation, le dispositif d'agitation selon l'invention comprend deux autres lames disposées symétriquement par rapport à l'arbre central et ayant chacune une longueur représentant environ 10 à 50 % de la circonférence de la paroi latérale de la cuve, l'extrémité inférieure de ces autres lames étant reliée à l'une des pales du deuxième ensemble par une quatrième tige, tandis que l'extrémité supérieure de ces autres lames est reliée à l'arbre central par une cinquième tige.According to a third embodiment, the device stirring according to the invention comprises two other blades arranged symmetrically with respect to the central tree and each having a length representing approximately 10 to 50% of the circumference of the side wall of the tank, the lower end of these other blades being connected to one of the blades of the second set by a fourth rod while the upper end of these others blades is connected to the central shaft by a fifth rod.

Selon ce mode de réalisation, la partie médiane de chacune desdites autres lames peut être reliée à l'arbre central par une sixième tige.According to this embodiment, the middle part of each of said other blades can be connected to the central shaft by a sixth stem.

Par ailleurs, les cinquièmes tiges peuvent être situées dans le prolongement l'une de l'autre, tout comme les sixièmes tiges.Furthermore, the fifth rods can be located in the extension of each other, as do the sixth rods.

Le dispositif d'agitation selon l'invention se caractérise en outre en ce que ses lames sont de section rectangulaire et sont vrillées de telle sorte que les grands cotés de la section de leur partie terminale inférieure s'étendent radialement, tandis que les grands cotés de la section de leur partie terminale supérieure forment un angle aigu avec la direction de l'arbre central.The stirring device according to the invention is characterized by further in that its blades are of rectangular section and are twisted so that the long sides of the section of their lower end extend radially, while the large sides of the section of their upper terminal part form an acute angle with the direction of the central shaft.

Grâce à leur vrillage particulier, les lames soumettent le produit, pendant la rotation du dispositif d'agitation, à un mouvement radial en direction de l'arbre ainsi qu'à un mouvement ascendant.Thanks to their particular twist, the blades subject the product, during rotation of the stirring device, at a radial movement towards the shaft as well as a movement ascending.

Etant donné que les pales fixées sur l'arbre sont normalement conformées pour soumettre le produit à un mouvement descendant, on conçoit aisément que le dispositif d'agitation selon l'invention est particulièrement efficace pour homogénéiser une importante quantité de produit disposée dans une cuve de grand diamètre.Since the blades attached to the shaft are normally shaped to subject the product to a downward movement, can easily see that the stirring device according to the invention is particularly effective for homogenizing a large quantity of product placed in a large diameter tank.

Trois modes d'exécution de la présente invention seront décrits ci-après à titre d'exemples nullement limitatifs en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en élévation schématique d'un dispositif d'agitation selon un premier mode de réalisation, la cuve dans laquelle ce dispositif d'agitation est utilisé étant esquissée par des traits mixtes ;
  • la figure 2 est une vue de dessus schématique du dispositif d'agitation visible sur la figure 1 ;
  • la figure 3 est une vue en élévation schématique d'un dispositif d'agitation selon un deuxième mode de réalisation ;
  • la figure 4 est une vue en élévation schématique d'un dispositif d'agitation selon un troisième mode de réalisation ;
  • la figure 5 est une vue en coupe selon la ligne V-V de la figure 2 ; et
  • la figure 6 est une vue en coupe selon la ligne VI-VI de la figure 2.
Three embodiments of the present invention will be described below by way of non-limiting examples with reference to the accompanying drawings in which:
  • Figure 1 is a schematic elevational view of a stirring device according to a first embodiment, the tank in which this stirring device is used being outlined by dashed lines;
  • Figure 2 is a schematic top view of the stirring device visible in Figure 1;
  • Figure 3 is a schematic elevational view of a stirring device according to a second embodiment;
  • Figure 4 is a schematic elevational view of a stirring device according to a third embodiment;
  • Figure 5 is a sectional view along line VV of Figure 2; and
  • FIG. 6 is a sectional view along line VI-VI of FIG. 2.

Le dispositif d'agitation visible sur les figures 1 et 2 comprend tout d'abord un arbre vertical 1 disposé suivant l'axe longitudinal d'une cuve cylindrique 2 destinée à contenir le produit à homogénéiser.The stirring device visible in Figures 1 and 2 first comprises a vertical shaft 1 arranged along the axis longitudinal of a cylindrical tank 2 intended to contain the product to be homogenized.

D'une manière connue en soi, l'arbre 1 est relié au niveau de son extrémité supérieure à un organe moteur non représenté situé à l'extérieur de la cuve et destiné à l'entraíner en rotation dans le sens de la flèche F. In a manner known per se, the shaft 1 is connected at the level of its upper end to a not shown drive member located outside the tank and intended to drive it in rotation in the direction of arrow F.

Il est normalement suspendu à l'organe moteur mais son extrémité inférieure pourrait éventuellement prendre appui contre le fond de la cuve afin qu'il demeure dans une position parfaitement coaxiale avec la paroi latérale 3 de la cuve.It is normally suspended from the motor organ but its lower end could possibly lean against the bottom of the tank so that it remains in a position perfectly coaxial with the side wall 3 of the tank.

Le dispositif d'agitation comprend également trois pales 4 fixées à l'extrémité inférieure de l'arbre 1, ces pales étant équidistantes angulairement et conformées pour déplacer le produit contenu dans la cuve, verticalement vers le bas lorsque l'arbre est entraíné en rotation dans le sens de la flèche F.The stirring device also includes three blades 4 attached to the lower end of the shaft 1, these blades being equidistant angularly and shaped to move the product contained in the tank, vertically downwards when the shaft is rotated in the direction of arrow F.

Il comprend par ailleurs deux lames inclinées 5 s'étendant à proximité de la paroi latérale 3 de la cuve et vrillées uniformément sur toute leur longueur.It also comprises two inclined blades 5 extending to near the side wall 3 of the tank and twisted evenly along their entire length.

Les lames 5 sont disposées symétriquement par rapport à l'arbre 1 et ont une longueur qui correspond à environ 40 à 50 % de la circonférence de la paroi latérale 3.The blades 5 are arranged symmetrically with respect to the tree 1 and have a length which corresponds to approximately 40 to 50% of the circumference of the side wall 3.

Les extrémités inférieures des lames 5 sont reliées chacune à une pâle 4 par l'intermédiaire d'une première tige 6 s'étendant horizontalement.The lower ends of the blades 5 are each connected to a pale 4 via a first rod 6 extending horizontally.

Les extrémités supérieures de ces lames sont en outre reliées chacune à l'arbre 1 par l'intermédiaire d'une deuxième tige horizontale 7.The upper ends of these blades are further connected each to shaft 1 via a second rod horizontal 7.

Dans l'exemple représenté, les deuxièmes tiges 7 sont situées dans le prolongement l'une de l'autre et fixées sur l'arbre 1 par l'intermédiaire d'un manchon cylindrique 8.In the example shown, the second rods 7 are located in the extension of one another and fixed on the shaft 1 by through a cylindrical sleeve 8.

Par ailleurs, la partie médiane de chacune des lames 5 est reliée à l'arbre 1 par l'intermédiaire d'une troisième tige horizontale 9.Furthermore, the middle part of each of the blades 5 is connected to the shaft 1 via a third rod horizontal 9.

Toujours dans l'exemple représenté, les troisièmes tiges 9 sont situées dans le prolongement l'une de l'autre et fixées sur l'arbre par l'intermédiaire d'un autre manchon cylindrique 10.Still in the example shown, the third rods 9 are located in the extension of one another and fixed on the shaft by means of another cylindrical sleeve 10.

En se référant maintenant aux figures 5 et 6, on remarquera que les lames 5 sont constituées par des plats de section rectangulaire et sont vrillées régulièrement sur toute leur longueur, leur vrillage étant tel que les grands côtés de la section de leur partie terminale inférieure s'étendent radialement, et donc horizontalement, tandis que les grands côtés de la section de leur partie terminale supérieure forment un angle aigu α avec la direction de l'arbre.Referring now to Figures 5 and 6, it will be noted that the blades 5 are formed by flat sections rectangular and are twisted regularly over their entire length, their twist being such that the long sides of the section of their lower terminal part extend radially, and therefore horizontally, while the long sides of the section of their upper end form a acute angle α with the direction of the tree.

Grâce à leur configuration vrillée particulière, les lames 5 déplacent le produit contenu dans la cuve 2 radialement vers l'intérieur et verticalement vers le haut lorsque l'arbre est entraíné en rotation dans le sens de la flèche F.Thanks to their particular twisted configuration, the blades 5 move the product contained in the tank 2 radially towards inside and vertically upward when the tree is rotated in the direction of arrow F.

L'action combinée des pales 4 et des lames 5 assure un brassage intense du produit et permet par conséquent une homogénéisation de ce dernier.The combined action of the blades 4 and the blades 5 ensures a intense mixing of the product and therefore allows homogenization of the latter.

Le dispositif d'agitation représenté sur la figure 3 diffère de celui qui vient d'être décrit en ce qu'il comprend trois pales 11 fixées sur l'arbre 1, approximativement à la hauteur des extrémités supérieures des lames 5.The stirring device shown in Figure 3 differs of the one just described in that it comprises three blades 11 fixed on the shaft 1, approximately at the height of the upper ends of the blades 5.

Les pales 11 sont équidistants angulairement et assurent la même fonction que les pales 4 du dispositif d'agitation représenté sur les figures 1 et 2.The blades 11 are angularly equidistant and ensure the same function as the blades 4 of the stirring device shown in Figures 1 and 2.

Compte tenu de la présence des pales 11, les deuxièmes tiges 7 du mode de réalisation visible sur les figures 1 et 2 ont été remplacées par deux tiges 12 reliant chacune une pale 11 à l'extrémité supérieure d'une lame 5.Given the presence of the blades 11, the second rods 7 of the embodiment visible in FIGS. 1 and 2 have been replaced by two rods 12 each connecting a blade 11 to the upper end of a blade 5.

Quant au dispositif d'agitation représenté sur la figure 4, il diffère de celui visible sur la figure 3 en ce qu'il comporte deux lames supplémentaires 13 identiques aux lames 5 du dispositif visible sur les figures 1 et 2.As for the stirring device shown in Figure 4, it differs from that visible in FIG. 3 in that it comprises two additional blades 13 identical to blades 5 of device visible in Figures 1 and 2.

L'extrémité inférieure des lames 13 est reliée à l'une des pales 11 par une quatrième tige 14. L'extrémité supérieure et la partie médiane de ces lames sont en outre reliées à l'arbre 1, respectivement par une cinquième tige 15 et une sixième tige 16.The lower end of the blades 13 is connected to one of the blades 11 by a fourth rod 14. The upper end and the middle part of these blades are further connected to the shaft 1, respectively by a fifth rod 15 and a sixth rod 16.

On conçoit aisément que les tiges 14, 15 et 16 correspondent respectivement aux tiges 6, 7 et 9 du premier mode de réalisation et exercent les mêmes fonctions que celles-ci.It is easy to see that the rods 14, 15 and 16 correspond respectively to rods 6, 7 and 9 of the first embodiment and exercise the same functions as these.

Pour être complet, on précisera que les parties terminales supérieure et inférieure des lames 13 sont orientées comme les parties terminales supérieure et inférieure des lames 5, c'est-à-dire comme représenté sur les figures 5 et 6.To be complete, we will specify that the terminal parts upper and lower blades 13 are oriented as the upper and lower end portions of the blades 5, i.e. as shown in Figures 5 and 6.

Les deux modes de réalisation représentés sur les figures 3 et 4 sont destinés à homogénéiser des quantités de produit plus grandes que celles que peut agiter le dispositif visible sur les figures 1 et 2. Les cuves dans lesquelles ils sont utilisés doivent nécessairement être plus profonde que la cuve 2 pour que la totalité des pales et des lames exercent convenablement leurs fonctions.The two embodiments shown in Figures 3 and 4 are intended to homogenize more product quantities larger than those which the visible device can shake on Figures 1 and 2. The tanks in which they are used must necessarily be deeper than tank 2 in order for all the blades and blades properly exercise their functions.

Claims (12)

Dispositif pour agiter un produit liquide, pâteux ou particulaire contenu dans une cuve (2) comportant une paroi latérale cylindrique (3), dispositif comprenant un arbre central (1) s'étendant coaxialement avec la paroi latérale de la cuve, un ensemble de pales équidistantes angulairement (4) prévu à l'extrémité inférieure de l'arbre central, et deux lames inclinées (5) s'étendant à proximité de la paroi latérale de la cuve, ces deux lames ayant une section rectangulaire et étant disposées symétriquement par rapport à l'arbre central, caractérisé en ce que les deux lames (5) sont uniformément vrillées de l'une à l'autre de leurs extrémités, les grands cotés de la section de leur partie terminale inférieure s'étendant radialement, tandis que les grands cotés de la section de leur partie terminale supérieure forment un angle aigu avec la direction de l'arbre central.Device for agitating a liquid, pasty or particulate product contained in a tank (2) having a cylindrical side wall (3), device comprising a central shaft (1) extending coaxially with the side wall of the tank, a set of blades angularly equidistant (4) provided at the lower end of the central shaft, and two inclined blades (5) extending near the side wall of the tank, these two blades having a rectangular section and being arranged symmetrically with respect to to the central shaft, characterized in that the two blades (5) are uniformly twisted from one to the other of their ends, the long sides of the section of their lower terminal portion extending radially, while the long sides of the section of their upper end form an acute angle with the direction of the central shaft. Dispositif selon la revendication 1, caractérisé en ce que les deux lames (5) ont chacune une longueur représentant environ 10 à 50 % de la circonférence de la paroi latérale (3) de la cuve (2).Device according to claim 1, characterized in that the two blades (5) each have a length representing approximately 10 to 50% of the circumference of the side wall (3) of the tank (2). Dispositif selon la revendication 1 ou 2, caractérisé en ce que les extrémités inférieure et supérieure de chacune des lames (5) sont reliées par des première et deuxième tiges (6,7), respectivement à l'une des pales (4) et à l'arbre central (1).Device according to claim 1 or 2, characterized in that the lower and upper ends of each of the blades (5) are connected by first and second rods (6,7), respectively to one of the blades (4) and to the central shaft (1). Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la partie médiane de chacune des lames (5) est reliée à l'arbre central (1) par une troisième tige (9).Device according to any one of claims 1 to 3, characterized in that the middle part of each of the blades (5) is connected to the central shaft (1) by a third rod (9). Dispositif selon la revendication 3 ou 4, caractérisé en ce que les deuxièmes tiges (7) s'étendent radialement et sont situées dans le prolongement l'une de l'autre, tout comme les troisièmes tiges (9).Device according to claim 3 or 4, characterized in that the second rods (7) extend radially and are located in the extension of one another, like the third rods (9). Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il comprend un deuxième ensemble de pales (11) équidistantes angulairement, ce deuxième ensemble étant fixé sur l'arbre (1), approximativement à la hauteur des extrémités supérieures des deux lames (5).Device according to any one of Claims 1 to 5, characterized in that it comprises a second set of angularly equidistant blades (11), this second set being fixed on the shaft (1), approximately at the height of the upper ends two blades (5). Dispositif selon la revendication 6, caractérisé en ce que l'extrémité inférieure de chacune des lames (5) est reliée à l'une des pales (4) du premier ensemble par une première tige (6), tandis que l'extrémité supérieure de chacune de ces lames est reliée à l'une des pales (11) du deuxième ensemble par une deuxième tige (12).Device according to claim 6, characterized in that the lower end of each of the blades (5) is connected to one of the blades (4) of the first set by a first rod (6), while the upper end of each of these blades is connected to one of the blades (11) of the second set by a second rod (12). Dispositif selon la revendication 7, caractérisé en ce que la partie médiane de chacune des lames (5) est reliée à l'arbre central (1) par une troisième tige (9), les troisièmes tiges s'étendant radialement et étant situées dans le prolongement l'une de l'autre.Device according to claim 7, characterized in that the middle part of each of the blades (5) is connected to the central shaft (1) by a third rod (9), the third rods extending radially and being located in the extension of each other. Dispositif selon l'une quelconque des revendications 6 à 8, caractérisé en ce qu'il comprend deux autres lames (13) disposées symétriquement par rapport à l'arbre central (1) et ayant chacune une longueur représentant environ 10 à 50 % de la circonférence de la paroi latérale de la cuve, l'extrémité inférieure de ces autres lames (13) étant reliée à l'une des pales (11) du deuxième ensemble par une quatrième tige (14), tandis que l'extrémité supérieure de ces autres lames est reliée à l'arbre central (1) par une cinquième tige (15).Device according to any one of Claims 6 to 8, characterized in that it comprises two other blades (13) arranged symmetrically with respect to the central shaft (1) and each having a length representing approximately 10 to 50% of the circumference of the side wall of the tank, the lower end of these other blades (13) being connected to one of the blades (11) of the second set by a fourth rod (14), while the upper end of these other blades is connected to the central shaft (1) by a fifth rod (15). Dispositif selon la revendication 9, caractérisé en ce que la partie médiane de chacune desdites autres lames (13) est reliée à l'arbre central (1) par une sixième tige (16).Device according to claim 9, characterized in that the middle part of each of said other blades (13) is connected to the central shaft (1) by a sixth rod (16). Dispositif selon la revendication 8 ou 9, caractérisé en ce que les cinquièmes tiges (15) sont situées dans le prolongement l'une de l'autre, tout comme les sixièmes tiges (16).Device according to claim 8 or 9, characterized in that the fifth rods (15) are located in the extension of one another, just like the sixth rods (16). Dispositif selon l'une quelconque des revendications 9 à 11, caractérisé en ce que les lames (13) ont une section rectangulaire et son vrillées de telle sorte que les grands côtés de la section de leur partie terminale inférieure s'étendent radialement, tandis que les grands côtés de la section de leur partie terminale supérieure forment un angle aigu avec la direction de l'arbre central.Device according to any one of Claims 9 to 11, characterized in that the blades (13) have a rectangular section and its twist so that the long sides of the section of their lower terminal part extend radially, while the long sides of the section of their upper terminal part form an acute angle with the direction of the central shaft.
EP04290355A 2003-02-19 2004-02-11 Stirring device with axial propeller and lateral blades Expired - Lifetime EP1449576B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0302019A FR2851177B1 (en) 2003-02-19 2003-02-19 AGITATOR DEVICE WITH AXIAL BLADES AND SIDE BLADES
FR0302019 2003-02-19

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EP1449576A1 true EP1449576A1 (en) 2004-08-25
EP1449576B1 EP1449576B1 (en) 2005-10-26

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AT (1) ATE307663T1 (en)
DE (1) DE602004000148D1 (en)
FR (1) FR2851177B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017110079A1 (en) * 2017-05-10 2018-11-15 EKATO Rühr- und Mischtechnik GmbH Rührorganvorrichtung

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Publication number Priority date Publication date Assignee Title
CH406149A (en) * 1960-09-05 1966-01-31 Ici Ltd Process for stirring liquids and mixtures of liquids with gases or solids and application of the process for carrying out a polyester reaction
US3292911A (en) * 1964-03-23 1966-12-20 Shell Oil Co Mixing device having adjustable wall scrapers
US4509860A (en) * 1983-05-03 1985-04-09 Lasar Manufacturing Co. Dual action mixer
EP1142471A1 (en) * 2000-04-06 2001-10-10 Egidio Pecis Mixer for preparing feedstuffs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH406149A (en) * 1960-09-05 1966-01-31 Ici Ltd Process for stirring liquids and mixtures of liquids with gases or solids and application of the process for carrying out a polyester reaction
US3292911A (en) * 1964-03-23 1966-12-20 Shell Oil Co Mixing device having adjustable wall scrapers
US4509860A (en) * 1983-05-03 1985-04-09 Lasar Manufacturing Co. Dual action mixer
EP1142471A1 (en) * 2000-04-06 2001-10-10 Egidio Pecis Mixer for preparing feedstuffs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017110079A1 (en) * 2017-05-10 2018-11-15 EKATO Rühr- und Mischtechnik GmbH Rührorganvorrichtung
US10857509B2 (en) 2017-05-10 2020-12-08 EKATO Rühr- und Mischtechnik GmbH Stirring element device

Also Published As

Publication number Publication date
ATE307663T1 (en) 2005-11-15
EP1449576B1 (en) 2005-10-26
FR2851177A1 (en) 2004-08-20
DE602004000148D1 (en) 2005-12-01
FR2851177B1 (en) 2007-04-06

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