EP0353126A1 - Machine for screening dusty, floury or granular products - Google Patents

Machine for screening dusty, floury or granular products Download PDF

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Publication number
EP0353126A1
EP0353126A1 EP89402053A EP89402053A EP0353126A1 EP 0353126 A1 EP0353126 A1 EP 0353126A1 EP 89402053 A EP89402053 A EP 89402053A EP 89402053 A EP89402053 A EP 89402053A EP 0353126 A1 EP0353126 A1 EP 0353126A1
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EP
European Patent Office
Prior art keywords
chamber
screen
screening
rotor
housing
Prior art date
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Granted
Application number
EP89402053A
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German (de)
French (fr)
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EP0353126B1 (en
Inventor
James Rochette
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FORPLEX SA
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FORPLEX SA
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Priority to AT89402053T priority Critical patent/ATE73018T1/en
Publication of EP0353126A1 publication Critical patent/EP0353126A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/20—Stationary drums with moving interior agitators

Definitions

  • the present invention relates to a machine for sieving powdery, floury or granular products.
  • the purpose of sieving such products is to separate the particles either to remove unwanted foreign bodies or to obtain a desired particle size.
  • Rotary devices or machines comprising in a one-piece casing, made of sheet metal or cast iron, a chute for feeding the product to be screened, a cylindrical screen chamber in which a screen paddle rotor rotated rotated by a motor and cooperating with a generally cylindrical screen, and a product discharge hopper passing through said screen.
  • a second hopper for the evacuation of products rejected by the sieve.
  • FIG. 1 An example of known equipment is shown in Figure 1 in exploded view.
  • Known devices are not entirely removable for cleaning by immersion in a neutralization bath, for example.
  • An apparatus of the above type operates as follows: the product is introduced into the chute 2, the Archimedes screw 6 ′ drives it and projects it inside the sieve 7 which is fixed; the cooperation of the 6 pal pallets rotating at high speed (between 300 and 1,000 rpm) and the mesh of the sieve causes particles of size less than or equal to the mesh to pass outside the sieve 7, where they are channeled towards the discharge hopper 4 through the walls of the chamber 3.
  • the screen 7 tends to clog. It is therefore necessary to intervene relatively frequently to replace and / or clean it. Likewise, the interior of the screening chamber must also be cleaned so that it can properly fulfill its function of channeling and evacuating the screened particles. Indeed, the free space between the outer wall of the screen 7 and the inner wall of the chamber 3 is relatively small and the accumulation of particles in this space ends up causing clogging of the device.
  • the rotor shaft 6 is not normally removable without the intervention of a mechanic; it is therefore the assembly of the Archimedes screw and the pallets which is removably mounted on the shaft.
  • the invention aims to remedy the drawbacks of these known devices and to provide a screening device which can be very quickly and completely cleaned by unskilled personnel and in which the screen can be easily replaced without this causing prolonged immobilization of the 'apparatus.
  • the invention provides for using in combination a sieving chamber and its evacuation hopper forming a whole separable from the rest of the machine, a sieve without frame, means for fixing both said chamber and said sieve. outside the chamber, and means for mounting the rotor carrying the Archimedes screw and the paddles, such that the latter can be completely removed from the apparatus and does not have any bearing inside the chamber sieving.
  • the device is completely empty and only has the inlet of the product and the outlet of refusals.
  • the chamber is made of all light, waterproof, non-tearable materials, for example a synthetic fabric.
  • the chamber and the screen are independent of each other.
  • they are assembled as a whole and made from a disposable material.
  • the device comprises a frame consisting of two vertical plates 11 and 12 connected together by spacers 13 or any other means of spacing.
  • a housing 14 housing two bearings 15 and 16 for a shaft hollow 17, the end of which protrudes outside the housing 14 carries a pulley 18.
  • the other end of the hollow shaft 17 ends in a central hole in the plate 11.
  • the housing 14 also forms a support for an electric motor 19, the output shaft 20 of which also carries a pulley 21.
  • the two pulleys 18 and 21 are connected together by a belt, not shown.
  • the plate 11 carries a ferrule 22 secured to a flange 23 fixed in a removable manner on the plate 11 by bolts 24. At its upper part, this ferrule 22 carries a chute 25 for admitting products.
  • clamps 26 and 27 On the outer part of the shell 22 are threaded two clamps 26 and 27 whose role will be described in more detail later.
  • the plate 12 opposite the plate 11 is crossed by a second ferrule 28 which includes a hopper 29 for discharging products rejected by the sieve.
  • the plate 11 is removably mounted on the spacers 13 by means of the nuts 30.
  • the ferrule 28 can be either permanently fixed to the plate 12 or removably mounted for example by a flange with an assembly identical to that of the ferrule 22 on the plate 11 .
  • a collar 31 and a crown 32 On the ferrule 28 are threaded a collar 31 and a crown 32 whose arrangement and role will be described in detail later.
  • the free end of the ferrule 28 is closed by a removable plate 33.
  • a screening chamber 34 forming a whole with its evacuation hopper 35 (see Figure 3).
  • this chamber is made of deformable material so that it can be engaged on the two adjacent ends ferrules 22 and 28, by means of flanges 34 ′ bordering the openings 34 ⁇ made on its opposite side walls 34.
  • a cylindrical screen 36 without reinforcement can be engaged on said ends.
  • a rotor 37 carrying an Archimedes screw 38 and pallets 39 is provided with a shaft 40 whose diameter is equal to the internal diameter of the hollow shaft 17.
  • the shaft 40 ends in a threaded end 41 intended to make projection in condition of use outside the pulley 18 and to be fixed on it by means of the washer 42 and the nut 43.
  • the blocking of the shaft 40 on the pulley 18 ensures its immobilization with respect to the hollow shaft 17 which drives it in rotation. It is understood that the rotor 37 can thus very easily and quickly be removed from the machine.
  • the screen 36 which has no reinforcement can be deformed so as to be threaded on the two ferrules 22 and 28. It is immobilized on the ferrule 22 by the clamp 26.
  • the other end of the screen 36 is fixed, by a clamp not shown, on a crown 32 which slides on the ferrule 28.
  • the crown 32 is provided with radial lugs 32 ′ intended to cooperate with means adjustment in translation (not shown) carried by the plate 12, for example screws.
  • the separability of the different elements of the machine offers the advantage of allowing thorough cleaning of each element (ferrules 22 and 28, rotor 37, screen 36, chamber 34) by individual soaking in a bath, for example.
  • the sieve does not have to be fitted with reinforcements and the interior of the chamber and of the ferrules is free from any fitting and fixing apparatus for the sieve. Their internal walls are therefore smooth, which further facilitates cleaning.
  • the end of the screen 36 which cooperates with the tension ring 32 is fixed on the latter by a collar.
  • FIG 4 is shown an advantageous embodiment in which the chamber 34 is integral with the screen 36 which is fixed to the flanges 34 '. There is thus formed a monobloc assembly which can advantageously be manufactured in disposable materials. For the use of such an assembly, it is necessary to use only a single clamp and a tensioning ring on either side of the removable chamber.
  • This variant embodiment is particularly advantageous when the apparatus according to the invention is used in industries where there is total incompatibility between the products successively treated, in particular in the pharmaceutical industry and the dye industry.
  • the rotor is mounted in a housing external to the chamber by means of a hollow shaft, and the housing carries the drive motor.
  • the motor can be fixed on a special frame in alignment with the housing and the rotor shaft can be directly supported by the housing bearings, a quick coupling between the motor output shaft and the end of the rotor shaft being provided.

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  • Combined Means For Separation Of Solids (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Fertilizers (AREA)

Abstract

Screening apparatus. It comprises, in combination, the screening chamber (34) and its discharge hopper (35) which form a unit which can be separated from the rest of the machine, an unreinforced screen (36), means (26, 27, 31, 32) outside the chamber for fastening both the said chamber and the said screen, and means (14, 17, 42, 43) for mounting the rotor (37) in such a way that the latter can be removed entirely from the apparatus and has no support piece inside the screening chamber. <IMAGE>

Description

La présente invention concerne une machine pour le tamisage de produits poudreux, farineux ou granuleux.The present invention relates to a machine for sieving powdery, floury or granular products.

Le tamisage de tels produits a pour but d'opérer une séparation des particules soit pour éliminer des corps étrangers indésirables soit pour obtenir une granulométrie recherchée.The purpose of sieving such products is to separate the particles either to remove unwanted foreign bodies or to obtain a desired particle size.

Le tamisage de produits poudreux, farineux ou granuleux est d'un emploi très répandu dans les industries agro-­alimentaires et chimiques.The sieving of powdery, floury or granular products is widely used in the food and chemical industries.

On utilise à cet effet des appareils ou machines rotatifs comprenant dans un carter monobloc, en tôle ou en fonte, une goulotte d'alimentation du produit à tamiser, une chambre de tamisage cylindrique dans laquelle tourne un rotor à palettes de tamisage entraîné en rotation par un moteur et coopérant avec un tamis généralement cylindrique, et une trémie d'évacuation des produits passant au travers dudit tamis. A l'extrémité de l'appareil se trouve une seconde trémie pour l'évacuation des produits refusés au tamis.Rotary devices or machines are used for this purpose, comprising in a one-piece casing, made of sheet metal or cast iron, a chute for feeding the product to be screened, a cylindrical screen chamber in which a screen paddle rotor rotated rotated by a motor and cooperating with a generally cylindrical screen, and a product discharge hopper passing through said screen. At the end of the device is a second hopper for the evacuation of products rejected by the sieve.

Un exemple de matériel connu est représenté sur la figure 1 en vue éclatée.An example of known equipment is shown in Figure 1 in exploded view.

On y voit de droite à gauche le moteur d'entraînement 1, la goulotte d'admission 2 des produits à tamiser. La chambre de tamisage 3 avec sa trémie d'évacuation inférieure 4 et sa trappe de visite 5, le rotor 6 entraîné en rotation par le moteur 1 avec sa vis d'Archimède 6′ d'entraînement du produit et ses palettes 6˝ destinées à coopérer avec le tamis cylindrique 7, la bride de montage 8 du tamis 7 et la plaque de fermeture 9 de la chambre 3.We see from right to left the drive motor 1, the inlet chute 2 of the products to be screened. The screening chamber 3 with its lower discharge hopper 4 and its inspection hatch 5, the rotor 6 driven in rotation by the motor 1 with its Archimedes screw 6 ′ for driving the product and its pallets 6˝ intended for cooperate with the cylindrical screen 7, the mounting flange 8 of the screen 7 and the closure plate 9 of the chamber 3.

Près de la plaque de fermeture 9, se trouve la deuxième trémie 10 d'évacuation des produits refusés par le tamis 7.Near the closure plate 9, there is the second hopper 10 for discharging products rejected by the screen 7.

Les appareils connus ne sont pas démontables entièrement pour un nettoyage par immersion dans un bain de neutralisation, par exemple.Known devices are not entirely removable for cleaning by immersion in a neutralization bath, for example.

Un appareil du type ci-dessus fonctionne de la manière suivante : le produit est introduit dans la goulotte 2, la vis d'Archimède 6′ l'entraîne et le projette à l'intérieur du tamis 7 qui est fixe ; la coopération des palettes 6˝ tournant à grande vitesse (entre 300 et 1.000 t/mn) et des mailles du tamis provoque le passage des particules de taille inférieure ou égale aux mailles à l'extérieur du tamis 7, où elles sont canalisées vers la trémie d'évacuation 4 par les parois de la chambre 3.An apparatus of the above type operates as follows: the product is introduced into the chute 2, the Archimedes screw 6 ′ drives it and projects it inside the sieve 7 which is fixed; the cooperation of the 6 pal pallets rotating at high speed (between 300 and 1,000 rpm) and the mesh of the sieve causes particles of size less than or equal to the mesh to pass outside the sieve 7, where they are channeled towards the discharge hopper 4 through the walls of the chamber 3.

Les particules de taille trop importante pour traverser le tamis s'accumulent sur celui-ci en direction de la plaque de fermeture 9 et passent dans la deuxième trémie d'évacuation 10.Particles too large to pass through the sieve accumulate thereon in the direction of the closing plate 9 and pass into the second discharge hopper 10.

On comprend qu'au bout d'un certain temps de fonctionnement, le tamis 7 à tendance à se colmater. Il faut donc intervenir relativement fréquemment pour le remplacer et/ou le nettoyer. De même, il faut également nettoyer l'intérieur de la chambre de tamisage pour qu'elle puisse remplir correctement sa fonction de canalisation et d'évacuation des particules tamisées. En effet, l'espace libre entre la paroi extérieure du tamis 7 et la paroi intérieure de la chambre 3 est relativement faible et l'accumulation de particules dans cet espace finit par provoquer un colmatage de l'appareil.It is understood that after a certain operating time, the screen 7 tends to clog. It is therefore necessary to intervene relatively frequently to replace and / or clean it. Likewise, the interior of the screening chamber must also be cleaned so that it can properly fulfill its function of channeling and evacuating the screened particles. Indeed, the free space between the outer wall of the screen 7 and the inner wall of the chamber 3 is relatively small and the accumulation of particles in this space ends up causing clogging of the device.

Avec un appereil monobloc de ce type connu, ces opérations de nettoyage du carter et de remplacement du tamis sont relativement nombreuses, longues, nécessitent un personnel spécialisé et provoquent une immobilisation prolongée de l'appareil . En effet, outre l'inconvénient propre à la disposition de la chambre de tamisage, celle-ci est encombrée à l'intérieur par les dispositifs de fixation et de centrage du tamis (glissières et couronne de centrage) ainsi que par l'arbre sur lequel sont calées la vis d'Archimède et des palettes.With a monobloc device of this known type, these operations of cleaning the casing and replacing the screens are relatively numerous, long, require specialized personnel and cause prolonged immobilization of the device. Indeed, in addition to the drawback specific to the arrangement of the screening chamber, it is cluttered inside by the devices for fixing and centering the screen (slides and centering ring) as well as by the shaft on which are wedged the Archimedes screw and pallets.

En effet, dans les appareils connus, l'arbre du rotor 6 n'est pas normalement démontable sans l'intervention d'un mécanicien ; c'est donc l'ensemble de la vis d'Archimède et des palettes qui est monté amovible sur l'arbre.Indeed, in known devices, the rotor shaft 6 is not normally removable without the intervention of a mechanic; it is therefore the assembly of the Archimedes screw and the pallets which is removably mounted on the shaft.

L'invention vise à remédier aux inconvénients de ces appareils connus et à procurer un appareil de tamisage qui puisse être très rapidement et complètement nettoyé par un personnel non spécialisé et dans lequel on puisse remplacer facilement le tamis sans que cela provoque une immobilisation prolongée de l'appareil.The invention aims to remedy the drawbacks of these known devices and to provide a screening device which can be very quickly and completely cleaned by unskilled personnel and in which the screen can be easily replaced without this causing prolonged immobilization of the 'apparatus.

A cet effet, l'invention prévoit d'utiliser en combinaison une chambre de tamisage et sa trémie d'évacuation formant un tout séparable du reste de la machine, un tamis sans armature, des moyens pour fixer à la fois ladite chambre et ledit tamis à l'extérieur de la chambre, et des moyens de montage du rotor portant la vis d'Archimède et les palettes, tels que celui-ci puisse être entièrement ôté de l'appareil et ne comporte aucun palier à l'intérieur de la chambre de tamisage.To this end, the invention provides for using in combination a sieving chamber and its evacuation hopper forming a whole separable from the rest of the machine, a sieve without frame, means for fixing both said chamber and said sieve. outside the chamber, and means for mounting the rotor carrying the Archimedes screw and the paddles, such that the latter can be completely removed from the apparatus and does not have any bearing inside the chamber sieving.

Ainsi, l'appareil est entièrement vide et ne comporte plus que l'entrée du produit et la sortie des refus.Thus, the device is completely empty and only has the inlet of the product and the outlet of refusals.

Avec un appareil de cette conception, il suffit d'ôter le rotor portant la vis d'Archimède et les palettes pour remplacer très rapidement l'ensemble de la chambre et du tamis qui peuvent être soit nettoyés à part soit jetés s'ils sont en matériau à bas prix. La chambre est réalisée en tous matériaux légers, étanchés, non déchirables, par exemple une toile synthétique.With a device of this design, it suffices to remove the rotor carrying the Archimedes screw and the paddles to replace very quickly the whole chamber and the sieve which can either be cleaned separately or discarded if they are made of low-cost material. The chamber is made of all light, waterproof, non-tearable materials, for example a synthetic fabric.

Selon une première forme de réalisation de l'invention, la chambre et le tamis sont indépendants l'un de l'autre.According to a first embodiment of the invention, the chamber and the screen are independent of each other.

Selon une deuxième forme de réalisation, ils sont assemblés comme un tout et fabriqués dans un matériau jetable.According to a second embodiment, they are assembled as a whole and made from a disposable material.

L'invention sera mieux comprise à l'aide des exemples de réalisation qui seront décrits ci-après en relation avec les dessins annexé sur lesquels :

  • La figure 1 est une vue de profil éclatée d'un appareil de tamisage de type connu;
  • La figure 2 est une vue schématique de profil en coupe d'un exemple de réalisation d'un appareil selon l'invention;
  • La figure 3 est une vue en perspective d'une chambre et d'un tamis en deux pièces séparées selon l'invention;
  • La figure 4 est une vue en perspective d'une chambre et d'un tamis monobloc selon une variante de réalisation de l'invention.
The invention will be better understood with the aid of the exemplary embodiments which will be described below in relation to the appended drawings in which:
  • Figure 1 is an exploded side view of a screening device of known type;
  • Figure 2 is a schematic sectional profile view of an embodiment of an apparatus according to the invention;
  • Figure 3 is a perspective view of a chamber and a screen in two separate parts according to the invention;
  • Figure 4 is a perspective view of a chamber and a one-piece screen according to an alternative embodiment of the invention.

Sur la figure 2, on voit que l'appareil comporte un bâti constitué par deux plaques verticales 11 et 12 reliées entre elles par des entretoises 13 ou tout autre moyen d'écartement.In Figure 2, we see that the device comprises a frame consisting of two vertical plates 11 and 12 connected together by spacers 13 or any other means of spacing.

Sur la face extérieure de la plaque 11 est fixé un boîtier 14 logeant deux paliers 15 et 16 pour un arbre creux 17 dont l'extrémité faisant saillie à l'extérieur du boîtier 14 porte une poulie 18. L'autre extrémité de l'arbre creux 17 aboutit dans un trou central de la plaque 11.On the outer face of the plate 11 is fixed a housing 14 housing two bearings 15 and 16 for a shaft hollow 17, the end of which protrudes outside the housing 14 carries a pulley 18. The other end of the hollow shaft 17 ends in a central hole in the plate 11.

Le boîtier 14 forme également support pour un moteur électrique 19 dont l'arbre de sortie 20 porte également une poulie 21. Les deux poulies 18 et 21 sont reliées entre elles par une courroie non représentée.The housing 14 also forms a support for an electric motor 19, the output shaft 20 of which also carries a pulley 21. The two pulleys 18 and 21 are connected together by a belt, not shown.

A l'opposé du boîtier 14, la plaque 11 porte une virole 22 solidaire d'une bride 23 fixée de manière démontable sur la plaque 11 par des boulons 24. A sa partie supérieure, cette virole 22 porte une goulotte 25 d'admission des produits.Opposite the housing 14, the plate 11 carries a ferrule 22 secured to a flange 23 fixed in a removable manner on the plate 11 by bolts 24. At its upper part, this ferrule 22 carries a chute 25 for admitting products.

Sur la partie extérieure de la virole 22 sont enfilés deux colliers de serrage 26 et 27 dont le rôle sera décrit plus en détail ultérieurement.On the outer part of the shell 22 are threaded two clamps 26 and 27 whose role will be described in more detail later.

La plaque 12 opposée à la plaque 11 est traversée par une deuxième virole 28 qui comporte une trémie 29 d'évacuation des produits refusés au tamis. La plaque 11 est montée amovible sur les entretoises 13 au moyen des écrous 30. La virole 28 peut être soit fixée définitivement sur la plaque 12 soit montée amovible par exemple par une bride avec un montage identique à celui de la virole 22 sur la plaque 11.The plate 12 opposite the plate 11 is crossed by a second ferrule 28 which includes a hopper 29 for discharging products rejected by the sieve. The plate 11 is removably mounted on the spacers 13 by means of the nuts 30. The ferrule 28 can be either permanently fixed to the plate 12 or removably mounted for example by a flange with an assembly identical to that of the ferrule 22 on the plate 11 .

Sur la virole 28 sont enfilés un collier 31 et une couronne 32 dont l'agencement et le rôle seront décrits en détail ultérieurement. L'extrémité libre de la virole 28 est fermée par une plaque amovible 33.On the ferrule 28 are threaded a collar 31 and a crown 32 whose arrangement and role will be described in detail later. The free end of the ferrule 28 is closed by a removable plate 33.

Dans l'espace libre entre les deux viroles est disposée une chambre de tamisage 34 formant un tout avec sa trémie d'évacuation 35 (voir figure 3). De préférence, cette chambre est en matériau déformable de manière à pouvoir être engagée sur les deux extrémités adjacentes des viroles 22 et 28, au moyen des collerettes 34′ bordant les ouvertures 34˝ pratiquées sur ses parois latérales opposées 34.In the free space between the two ferrules is disposed a screening chamber 34 forming a whole with its evacuation hopper 35 (see Figure 3). Preferably, this chamber is made of deformable material so that it can be engaged on the two adjacent ends ferrules 22 and 28, by means of flanges 34 ′ bordering the openings 34˝ made on its opposite side walls 34.

De même, un tamis cylindrique 36 sans armature peut être engagé sur lesdites extrémités.Likewise, a cylindrical screen 36 without reinforcement can be engaged on said ends.

Un rotor 37 portant une vis d'Archimède 38 et des palettes 39 est muni d'un arbre 40 dont le diamètre est égal au diamètre interne de l'arbre creux 17. L'arbre 40 se termine par une extrémité filetée 41 destinée à faire saillie en condition d'utilisation à l'extérieur de la poulie 18 et à être fixée sur elle au moyen de la rondelle 42 et de l'écrou 43. Le blocage de l'arbre 40 sur la poulie 18 assure son immobilisation par rapport à l'arbre creux 17 qui l'entraîne en rotation. On comprend que le rotor 37 peut ainsi très facilement et rapidement être retiré de la machine.A rotor 37 carrying an Archimedes screw 38 and pallets 39 is provided with a shaft 40 whose diameter is equal to the internal diameter of the hollow shaft 17. The shaft 40 ends in a threaded end 41 intended to make projection in condition of use outside the pulley 18 and to be fixed on it by means of the washer 42 and the nut 43. The blocking of the shaft 40 on the pulley 18 ensures its immobilization with respect to the hollow shaft 17 which drives it in rotation. It is understood that the rotor 37 can thus very easily and quickly be removed from the machine.

Le tamis 36 qui ne comporte aucune armature peut être déformé pour être enfilé sur les deux viroles 22 et 28. Il est immobilisé sur la virole 22 par le collier de serrage 26.The screen 36 which has no reinforcement can be deformed so as to be threaded on the two ferrules 22 and 28. It is immobilized on the ferrule 22 by the clamp 26.

Sur la virole 28, l'autre extrémité du tamis 36 est fixée, par un collier de serrage non représenté, sur une couronne 32 qui coulisse sur la virole 28. La couronne 32 est munie de pattes radiales 32′ destinées à coopérer avec des moyens de réglage en translation (non représenté) portés par la plaque 12, par exemple des vis.On the ferrule 28, the other end of the screen 36 is fixed, by a clamp not shown, on a crown 32 which slides on the ferrule 28. The crown 32 is provided with radial lugs 32 ′ intended to cooperate with means adjustment in translation (not shown) carried by the plate 12, for example screws.

Sur la figure 2, le mouvement de translation de la couronne 32 est symbolisé par la flèche F.In FIG. 2, the translational movement of the crown 32 is symbolized by the arrow F.

La traction des vis sur la couronne 32 assurera la mise en tension du tamis 36, indispensable au bon fonctionnement de l'appareil. Le tamis doit en effet être suffisamment tendu pour vibrer sous l'effet de la rotation des pales du rotor.The traction of the screws on the crown 32 will ensure the tensioning of the screen 36, essential for the proper functioning of the device. The sieve must indeed be sufficiently tight to vibrate under the effect of the rotation of the rotor blades.

Pour mettre l'appareil en condition de fonctionnement, il suffit d'enfiler le tamis 36 dans la chambre de tamisage 34, de déformer l'ensemble pour l'adapter sur les extrémités adjacentes des viroles 22 et 28 de serrer les colliers 26, 27 et 31, et de tendre la couronne 32. Puis on enfile le rotor dans l'arbre creux 17 et on le bloque avec la rondelle 42 et l'écrou 43. On referme ensuite la plaque d'extrémité 33.To put the device in operating condition, it suffices to thread the screen 36 into the screening chamber 34, to deform the assembly to adapt it to the adjacent ends of the ferrules 22 and 28 to tighten the collars 26, 27 and 31, and to tighten the crown 32. Then the rotor is threaded into the hollow shaft 17 and it is blocked with the washer 42 and the nut 43. The end plate 33 is then closed.

L'ensemble de ces opérations peut être effectué très rapidement par un personnel non spécialisé avec des outils très simples.All of these operations can be carried out very quickly by non-specialized personnel with very simple tools.

L'accessibilité à toutes les pièces de l'appareil rend leur nettoyage très aisé.Accessibility to all parts of the device makes cleaning very easy.

En outre la séparabilité des différents éléments de la machine offre l'avantage de permettre un nettoyage poussé de chaque élément (viroles 22 et 28, rotor 37, tamis 36, chambre 34) par trempage individuel dans un bain, par exemple.In addition, the separability of the different elements of the machine offers the advantage of allowing thorough cleaning of each element (ferrules 22 and 28, rotor 37, screen 36, chamber 34) by individual soaking in a bath, for example.

Du fait que la fixation de la chambre et le réglage de la tension du tamis s'effectue par l'extérieur, on obtient une grande simplification des diverses parties de l'appareil. En particulier, le tamis n'a pas a être équipé d'armatures et l'intérieur de la chambre et des viroles est libre de tout appareillage d'adaptation et de fixation du tamis. Leurs parois internes sont donc lisses, ce qui facilite encore le nettoyage.Due to the fact that the fixing of the chamber and the adjustment of the screen tension takes place from the outside, a great simplification of the various parts of the apparatus is obtained. In particular, the sieve does not have to be fitted with reinforcements and the interior of the chamber and of the ferrules is free from any fitting and fixing apparatus for the sieve. Their internal walls are therefore smooth, which further facilitates cleaning.

Dans l'exemple qui vient d'être décrit, l'extrémité du tamis 36 qui coopère avec la couronne de tension 32 est fixée sur cette dernière par un collier.In the example which has just been described, the end of the screen 36 which cooperates with the tension ring 32 is fixed on the latter by a collar.

Sur la figure 4 est représenté un mode de réalisation avantageux dans lequel la chambre 34 est solidaire du tamis 36 qui est par fixé sur les collerettes 34′. Il est ainsi constitué un ensemble monobloc qui peut être avantageusement fabriqué dans des matériaux jetables. Pour l'utilisation d'un tel ensemble , il est nécessaire de n'utiliser qu'un seul collier de serrage et qu'une couronne de mise en tension de part et d'autre de la chambre amovible.In Figure 4 is shown an advantageous embodiment in which the chamber 34 is integral with the screen 36 which is fixed to the flanges 34 '. There is thus formed a monobloc assembly which can advantageously be manufactured in disposable materials. For the use of such an assembly, it is necessary to use only a single clamp and a tensioning ring on either side of the removable chamber.

Cette variante de réalisation est particulièrement avantageuse lors de l'utilisation de l'appareil selon l'invention dans des industries où il y a une totale incompatibilité entre les produits successivement traités, notamment dans l'industrie pharmaceutique et l'industrie des colorants.This variant embodiment is particularly advantageous when the apparatus according to the invention is used in industries where there is total incompatibility between the products successively treated, in particular in the pharmaceutical industry and the dye industry.

Dans l'exemple de réalisation décrit, le rotor est monté dans un boîtier extérieur à la chambre au moyen d'un arbre creux, et le boîtier porte le moteur d'entraînement.In the embodiment described, the rotor is mounted in a housing external to the chamber by means of a hollow shaft, and the housing carries the drive motor.

On peut sans sortir du cadre de l'invention adopter d'autres dispositions. Par exemple, le moteur peut être fixé sur un bâti spécial dans l'alignement du boîtier et l'arbre du rotor peut être directement supporté par les paliers du boîtier, un accouplement rapide entre l'arbre de sortie du moteur et l'extrémité de l'arbre du rotor étant prévu.Without departing from the scope of the invention, other provisions can be adopted. For example, the motor can be fixed on a special frame in alignment with the housing and the rotor shaft can be directly supported by the housing bearings, a quick coupling between the motor output shaft and the end of the rotor shaft being provided.

Claims (5)

1. Appareil de tamisage du type comportant un rotor, muni d'une vis d'Archimède et des palettes, entraîné en rotation dans un ensemble comportant une goulotte d'amenée des produits à traiter, une chambre de tamisage logeant un tamis et munie d'une trémie d'évacuation du produit tamisé, et une seconde trémie d'évacuation des produits refusés au tamis, caractérisé en ce qu'il comporte en combinaison la chambre de tamisage (34) et sa trémie d'évacuation (35) formant un tout séparable au reste de la machine, un tamis sans armature (36), des moyens (26, 27, 31, 32) pour fixer à la fois ladite chambre et ledit tamis à l'extérieur de la chambre, et des moyens (14, 17, 42, 43) pour monter le rotor (37) de telle sorte que celui-ci puisse être entièrement ôté de l'appareil et ne comporte aucune pièce de support à l'intérieur de la chambre de tamisage.1. Screening device of the type comprising a rotor, provided with an Archimedes screw and pallets, driven in rotation in an assembly comprising a chute for supplying the products to be treated, a screening chamber housing a screen and provided with '' a hopper for evacuating the sieved product, and a second hopper for evacuating products rejected by the sieve, characterized in that it comprises in combination the sieving chamber (34) and its evacuation hopper (35) forming a all separable from the rest of the machine, a screen without reinforcement (36), means (26, 27, 31, 32) for fixing both said chamber and said screen outside the chamber, and means (14 , 17, 42, 43) for mounting the rotor (37) in such a way that it can be completely removed from the device and does not have any supporting part inside the screening chamber. 2. Appareil selon la revendication 1, caractérisé en ce que la chambre de tamisage (34) et le tamis (36) sont en deux pièces séparées.2. Apparatus according to claim 1, characterized in that the screening chamber (34) and the screen (36) are in two separate parts. 3. Appareil selon la revendication 1, caractérisé en ce que la chambre de tamisage (34) et le tamis (36) sont en une seule pièce.3. Apparatus according to claim 1, characterized in that the screening chamber (34) and the screen (36) are in one piece. 4. Appareil selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le rotor (37) est monté dans un arbre creux (17) logé dans un boîtier (14) disposé à l'extérieur de la chambre de tamisage et dans l'alignement de celle-ci et en ce que ledit boîtier porte également le moteur d'entraînement.4. Apparatus according to any one of claims 1 to 3, characterized in that the rotor (37) is mounted in a hollow shaft (17) housed in a housing (14) disposed outside of the screening chamber and in alignment with it and in that said housing also carries the drive motor. 5. Appareil selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le tamis (36) est monté sur une couronne (32) qui coulisse à l'extérieur de l'appareil et qui coopére avec des mécanismes de tension solidaires du bâti de l'appareil.5. Apparatus according to any one of claims 1 to 4, characterized in that the screen (36) is mounted on a ring (32) which slides outside the apparatus and which cooperates with tensioning mechanisms integral of the appliance body.
EP89402053A 1988-07-25 1989-07-19 Machine for screening dusty, floury or granular products Expired - Lifetime EP0353126B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89402053T ATE73018T1 (en) 1988-07-25 1989-07-19 MACHINE FOR SCREENING DUSTY, FLOURY OR GRAINY PRODUCTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8810012 1988-07-25
FR8810012A FR2619324B1 (en) 1988-07-25 1988-07-25 MACHINE FOR SIEVING POWDERY, FLOUROUS OR GRANULAR PRODUCTS

Publications (2)

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EP0353126A1 true EP0353126A1 (en) 1990-01-31
EP0353126B1 EP0353126B1 (en) 1992-03-04

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EP89402053A Expired - Lifetime EP0353126B1 (en) 1988-07-25 1989-07-19 Machine for screening dusty, floury or granular products

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EP (1) EP0353126B1 (en)
AT (1) ATE73018T1 (en)
DE (1) DE68900914D1 (en)
FR (1) FR2619324B1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2686273A1 (en) * 1992-01-22 1993-07-23 Forplex Sieving (sifting) apparatus
EP0815957A1 (en) * 1996-06-25 1998-01-07 Rudolf Schinke Sieving device for sieving powdery material
EP0917911A2 (en) * 1997-11-20 1999-05-26 AZO GmbH &amp; Co Screening device
EP1813356A2 (en) 2006-01-25 2007-08-01 Jorma Kivimäki Fines separator
EP2676742A2 (en) * 2012-06-19 2013-12-25 Kek-Gardner Limited Centrifugal sifting apparatus
DE202016003780U1 (en) 2016-06-17 2017-06-21 Azo Holding Gmbh Screening machine with a rotating in a basket basket rotor and screen basket for such a screening machine
EP3810328A4 (en) * 2018-06-19 2022-03-23 Ecomill LLC Method for separating fine fractures and coarse fractures using a vacuum

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1050203A (en) * 1952-02-05 1954-01-06 Machine for cleaning and aerating flour and other products
DE1255461B (en) * 1965-06-05 1967-11-30 Adolf Zimmermann Maschb Sieve drum with rotating beater mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1050203A (en) * 1952-02-05 1954-01-06 Machine for cleaning and aerating flour and other products
DE1255461B (en) * 1965-06-05 1967-11-30 Adolf Zimmermann Maschb Sieve drum with rotating beater mechanism

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2686273A1 (en) * 1992-01-22 1993-07-23 Forplex Sieving (sifting) apparatus
EP0815957A1 (en) * 1996-06-25 1998-01-07 Rudolf Schinke Sieving device for sieving powdery material
EP0917911A2 (en) * 1997-11-20 1999-05-26 AZO GmbH &amp; Co Screening device
EP0917911A3 (en) * 1997-11-20 2000-07-12 AZO GmbH &amp; Co Screening device
EP1813356A2 (en) 2006-01-25 2007-08-01 Jorma Kivimäki Fines separator
EP1813356A3 (en) * 2006-01-25 2008-07-23 Jorma Kivimäki Fines separator
EP2676742A2 (en) * 2012-06-19 2013-12-25 Kek-Gardner Limited Centrifugal sifting apparatus
EP2676742A3 (en) * 2012-06-19 2014-02-12 Kek-Gardner Limited Centrifugal sifting apparatus
DE202016003780U1 (en) 2016-06-17 2017-06-21 Azo Holding Gmbh Screening machine with a rotating in a basket basket rotor and screen basket for such a screening machine
EP3810328A4 (en) * 2018-06-19 2022-03-23 Ecomill LLC Method for separating fine fractures and coarse fractures using a vacuum

Also Published As

Publication number Publication date
FR2619324A1 (en) 1989-02-17
DE68900914D1 (en) 1992-04-09
EP0353126B1 (en) 1992-03-04
FR2619324B1 (en) 1991-05-10
ATE73018T1 (en) 1992-03-15

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