WO2001027566A1 - Doser for solid matter - Google Patents
Doser for solid matter Download PDFInfo
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- WO2001027566A1 WO2001027566A1 PCT/FR2000/002858 FR0002858W WO0127566A1 WO 2001027566 A1 WO2001027566 A1 WO 2001027566A1 FR 0002858 W FR0002858 W FR 0002858W WO 0127566 A1 WO0127566 A1 WO 0127566A1
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- hopper
- axis
- rotation
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- metering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F13/00—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
- G01F13/001—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups for fluent solid material
Definitions
- the present invention relates to a divided solid matter metering apparatus; the device which makes it possible to carry out a regular flow at the outlet of the apparatus can also ensure a crushing and a calibration of the material when it is friable.
- the dosing of solid material is carried out by vibrating lanes, rotary turns, distributors with vibrating bowl for example; these are devices which generally operate with calibrated material, a prior stage of grinding-calibration in a specific device may then be necessary; the complexity of these materials or their maintenance and their size make it difficult to adapt them to conditions where reliability of operation, ease of intervention and small size are required, and these devices have limited characteristics of use (material, flow).
- French Patent 1,146,448 which constitutes the closest prior art, relates to the dosing of powders and comprises a hopper into which the powder is poured and a horizontal disc placed at a certain depth under the orifice at the base of the hopper. A portion of the powder rests on the disc by forming a cone -of slope defined by the coefficient of friction of the grains of the powder and of base surface defined by the height and the radius of the orifice hopper.
- a stationary knife of radial orientation, penetrates into the cone. As soon as the disc is rotated, the knife scrapes the powder from an invariable section of the cone, which is constantly reforming behind it, and the scraped powder is collected at a fixed rate depending on the speed of rotation of the disc.
- the device is quite bulky under the hopper, and above all the stability of the flow depends on the perfection of the cone, which cannot be guaranteed for heterogeneous, rough or roughly divided materials. It is also necessary to avoid vibrations and the generation of sensitive centrifugal forces by the disc.
- the metering device according to the invention can make it possible to carry out in one device the metering and grinding of solid material; in applications where grinding is necessary for regular dosing or obtaining a calibrated product, these dosing and grinding functions are performed by the same device fitted to the device.
- the apparatus comprises a hopper which contains the charge of material to be metered, and the base of which is partially obstructed by a member which constitutes the metering and possibly grinding device; in operation, this member is rotated by a rotating vertical axis.
- the organ can be suspended by the axis from a drive system comprising an overhanging motor, or supported by this system, which is then placed under the organ.
- the clearance between the base of the hopper and the rotary member is dimensioned to form a calibrated passage section.
- the device may have the following aspects:
- the metering member consists of a disc, the diameter and clearance of passage at the outlet of the hopper are appropriate to the particle size of the material and the desired flow range; the device could possibly be provided with fins or projections;
- the metering and grinding member consists of a conical-shaped twist or cutter with straight or helical grooves, the outlet of the hopper opposite this part having then similar grooves; the adjustment of the clearance of passage between the spin and the outlet end of the hopper makes it possible to obtain the particle size and the desired material flow rates.
- integral blades driven in rotation simultaneously with the metering member by the axis can promote the feeding of this member; scrapers driven by the axis simultaneously with the organ dosing improve the flow of the product on the internal face of the hopper; the above elements can be suspended from a load cell which allows permanent monitoring of the load and the regularity of the dosage; finally, the hopper and the metering device can be surrounded by a sealed enclosure which allows the operation to be confined by avoiding the dissemination of material which would be easily dispersible, and maintains atmospheric pressure or atmospheric conditions specific to the process that 'we undertake; a gas sweep of the enclosure can be carried out.
- FIG. 1 - represents a general section of the apparatus designed as a simple metering device
- the apparatus comprises a hopper whose bottom part is conical; on the top, an orifice allows filling by a loading pipe 13; the base of the hopper 1 is open and equipped with a metering member.
- the device also includes a motor 3 installed on top of the hopper 1 and which drives in rotation, by means of an axis 4 passing through the hopper and vertical, the metering member, which here consists of a disc 2 partially sealing the base of the hopper 1, extending beneath it and separated from this base by a circular clearance which is a function of the particle size of the product to be dosed and of the desired flow range: the diameter of the disc 2 and the clearance make it possible to deliver a zero flow of product when the axis 4 is at rest and a flow which depends on the speed of rotation, as well as on the width of the clearance, otherwise.
- scrapers 8 are still driven by the axis 4 and consist of wings which extend almost to the internal face of the hopper 1.
- the preceding elements are suspended from a load cell 9 via of a part called lantern 10, in fact an envelope which surrounds and protects the motor 3, and which measures the weight of these elements and that of the load of product to be metered which has been poured into the hopper 1: one can thus control at any time the degree of filling of the hopper 1 and the regularity of the dosage.
- the apparatus further comprises a two-part sealed enclosure, an envelope 11 to which is attached a cover 12 and which surrounds the preceding elements, the load cell 9 being fixed under the cover 12; the enclosure is crossed by the - loading pipe 13 through which the hopper is filled, by a flow pipe 14 at the base through which the metered product flows, and by connection passages 15 for electrical cables leading to the motor 3 and to the load cell 9 and which end with disconnectable sockets facing the outside; it can also receive a gas sweeping pipe 16 which also passes through it and makes it possible to inject gas to give a atmosphere of particular composition; the enclosure also makes it possible to maintain a pressure which, depending on its value, prohibits the risk of dissemination of the metered product, or makes it possible to degas its contents if necessary, - if no particular precaution must be taken, the enclosure can be omitted.
- the apparatus which must operate under conditions of stability required for regularity of dosage and validity of the weighing may however be integrated into a system producing vibrations; in this case, the connecting pipes are equipped with flexible portions such as bellows which will stop the vibrations, and the support of the assembly in the system may if necessary be stiffened or, on the contrary, made 'floating'.
- the device is equipped and adjusted according to the operating conditions, the solid material used and the flow rates sought.
- the motor 3 is started at the speed giving the desired flow rate to cause the product to flow around the periphery of the disc 2.
- Regular weighing makes it possible to control the operation.
- the passage section between the disc 2 and the base of the hopper 1 remains constant, which makes it possible to adjust the metering flow rate with great stability as a function of the speed of rotation, whatever the height of the product in the hopper 1 on the only condition that it occupies the entire section of the game.
- the game calibrates the flow of the material to be dosed.
- These dosers are used in a small vitrification installation of radioactive solutions, for dosing small quantities of waste at low flow rates. Two types of product are commonly dosed there:
- This type of metering is also possible for feeding more or less calibrated parts in metal smelting processes such as for example the remelting of cladding waste from nuclear fuels.
- these devices can be used for dosing and grinding divided solid matter.
- the disc 2 is replaced by a spin 5 which extends through the mouth of the hopper 1 and which allows not only to dose, but to grind and to calibrate the product escaping from the hopper 1; the mouth 6 of the hopper is then fitted with vertical or oblique grooves 17; blades 7, integral with the axis 4 in rotation, and which are inclined in this direction of rotation, produce a downward force on the contents of the hopper 1 and direct it towards the spin 5 to promote its feeding and the dosage.
- the grains of the solid to be dosed leave the hopper 1 through the circular clearance (here substantially vertical, while it was horizontal with the disc 2) formed between the spin 5 and the mouth 6, while being ground between the threads the spin 5 and the ridges between grooves 17 of the mouth 6.
- This game has, going downwards, first of a decreasing width which favors the regularity of the metering and of the grinding, then a constant width, the mouth 6 having a variable taper which becomes parallel to that of the spinner 5.
- the metering flow rate is proportional to the speed of rotation of the spinner 5 as a function of the width of the clearance.
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- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
Description
DOSEUR POUR MATIERE SOLIDE SOLID MATERIAL DOSER
DESCRIPTIONDESCRIPTION
La présente invention concerne un appareil de dosage de matière solide divisée ; le dispositif qui permet d'effectuer un écoulement régulier en sortie de l'appareil peut également assurer un broyage et un calibrage de la matière lorsqu'elle est friable.The present invention relates to a divided solid matter metering apparatus; the device which makes it possible to carry out a regular flow at the outlet of the apparatus can also ensure a crushing and a calibration of the material when it is friable.
Habituellement, le dosage de matière solide est réalisé par des couloirs vibrants, des spires rotatives, des distributeurs à bol vibrant par exemple ; ce sont des appareils qui fonctionnent en général avec de la matière calibrée, une étape préalable de broyage-calibrage dans un appareil spécifique pouvant alors être nécessaire ; la complexité de ces matériels ou de leur entretien et leur encombrement rendent difficile leur adaptation à des conditions où fiabilité de fonctionnement, facilité d'intervention et faible encombrement sont requis, et ces appareils ont des caractéristiques d'utilisation (matière, débit) limitées.Usually, the dosing of solid material is carried out by vibrating lanes, rotary turns, distributors with vibrating bowl for example; these are devices which generally operate with calibrated material, a prior stage of grinding-calibration in a specific device may then be necessary; the complexity of these materials or their maintenance and their size make it difficult to adapt them to conditions where reliability of operation, ease of intervention and small size are required, and these devices have limited characteristics of use (material, flow).
Le brevet français 1 146 448, qui constitue l'art antérieur le plus proche, est relatif au dosage de poudres et comprend une trémie dans laquelle la poudre est versée et un disque horizontal placé à une certaine profondeur sous l'orifice à la base de la trémie. Une portion de la poudre repose sur le disque en formant un cône -de pente définie par le coefficient de frottement des grains de la poudre et de superficie de base définie par la hauteur et le rayon de l'orifice de la trémie. De plus, un couteau fixe, d'orientation radiale, pénètre dans le cône. Dès que le disque est mis en rotation, le couteau racle la poudre d'une section invariable du cône, qui se reforme sans cesse derrière lui, et la poudre raclée est recueillie à un débit fixe en fonction de la vitesse de rotation du disque. Toutefois, le dispositif est assez encombrant sous la trémie, et surtout la stabilité du débit dépend de la perfection du cône, qu'on ne peut garantir pour des matières hétéroclites, rugueuses ou grossièrement divisées. Il faut aussi éviter les vibrations et la production de forces centrifuges sensibles par le disque .French Patent 1,146,448, which constitutes the closest prior art, relates to the dosing of powders and comprises a hopper into which the powder is poured and a horizontal disc placed at a certain depth under the orifice at the base of the hopper. A portion of the powder rests on the disc by forming a cone -of slope defined by the coefficient of friction of the grains of the powder and of base surface defined by the height and the radius of the orifice hopper. In addition, a stationary knife, of radial orientation, penetrates into the cone. As soon as the disc is rotated, the knife scrapes the powder from an invariable section of the cone, which is constantly reforming behind it, and the scraped powder is collected at a fixed rate depending on the speed of rotation of the disc. However, the device is quite bulky under the hopper, and above all the stability of the flow depends on the perfection of the cone, which cannot be guaranteed for heterogeneous, rough or roughly divided materials. It is also necessary to avoid vibrations and the generation of sensitive centrifugal forces by the disc.
Le doseur selon l'invention peut permettre de réaliser en un seul appareil le dosage et le broyage de matière solide ; dans les applications où le broyage est nécessaire pour la régularité du dosage ou l'obtention d'un produit calibré, ces fonctions de dosage et de broyage sont effectuées par le même dispositif équipant l'appareil.The metering device according to the invention can make it possible to carry out in one device the metering and grinding of solid material; in applications where grinding is necessary for regular dosing or obtaining a calibrated product, these dosing and grinding functions are performed by the same device fitted to the device.
L'appareil comprend une trémie qui contient la charge de matière à doser, et dont la base est partiellement obstruée par un organe qui constitue le dispositif de dosage et éventuellement de broyage ; en fonctionnement, cet organe est entraîné en rotation par un axe vertical tournant. L'organe peut être suspendu par l'axe à un système d'entraînement comprenant un moteur surplombant, ou supporté par ce système, qui est alors placé sous l'organe. De façon caractéristique, le jeu entre la base de la trémie et l'organe rotatif est dimensionné pour former une section calibrée de passage de la matière à doser : en l'absence d'un autre moyen, le débit de matière dosée ne dépend que de la vitesse de rotation de l'organe tournant et des forces d'entraînement, notamment centrifuges, qu'il exerce sur la portion de la charge qui lui est adjacente. Le réglage de débit est alors très stable en dépit des incertitudes ou des irrégularités de taille des grains de la charge.The apparatus comprises a hopper which contains the charge of material to be metered, and the base of which is partially obstructed by a member which constitutes the metering and possibly grinding device; in operation, this member is rotated by a rotating vertical axis. The organ can be suspended by the axis from a drive system comprising an overhanging motor, or supported by this system, which is then placed under the organ. Typically, the clearance between the base of the hopper and the rotary member is dimensioned to form a calibrated passage section. of the material to be dosed: in the absence of any other means, the flow of dosed material only depends on the speed of rotation of the rotating member and on the drive forces, in particular centrifugal, which it exerts on the portion of the load adjacent to it. The flow control is then very stable despite the uncertainties or irregularities in grain size of the feed.
Selon les matières ou les conditions d'utilisation, l'appareil pourra avoir les aspects suivants :Depending on the materials or conditions of use, the device may have the following aspects:
- pour de la matière ne nécessitant pas de broyage, l'organe de dosage est constitué d'un disque dont le diamètre et le jeu de passage en sortie de la trémie sont appropriés à la granulométrie de la matière et la plage de débit souhaitée ; le dispositif pourra éventuellement être pourvu d'ailettes ou de saillies ;- For material that does not require grinding, the metering member consists of a disc, the diameter and clearance of passage at the outlet of the hopper are appropriate to the particle size of the material and the desired flow range; the device could possibly be provided with fins or projections;
- pour le dosage et le broyage de matière friable, l'organe de dosage et broyage est constitué d'une vrille ou fraise de forme conique à rainures droites ou hélicoïdales, la sortie de la trémie en vis-à-vis de cette pièce ayant alors des rainures similaires ; le réglage du jeu de passage entre la vrille et l'embout de sortie de la trémie permet d'obtenir la granulométrie et les débits de matière souhaités.- for metering and grinding of friable material, the metering and grinding member consists of a conical-shaped twist or cutter with straight or helical grooves, the outlet of the hopper opposite this part having then similar grooves; the adjustment of the clearance of passage between the spin and the outlet end of the hopper makes it possible to obtain the particle size and the desired material flow rates.
Selon quelques autres aspects de l'invention, des pales solidaires entraînées en rotation simultanément à l'organe de dosage par l'axe peuvent favoriser l'alimentation de cet organe ; des racleurs entraînés par l'axe simultanément à l'organe de dosage améliorent l'écoulement du produit sur la face interne de la trémie ; les éléments précédents peuvent être suspendus à un peson qui permet de contrôler en permanence la charge et la régularité du dosage ; enfin, la trémie et le dispositif de dosage peuvent être entourés d'une enceinte étanche qui permet de confiner l'opération en évitant la dissémination de matière qui serait facilement dispersable, et maintient des conditions de pression ou d'ambiance atmosphérique propres au procédé qu'on entreprend ; un balayage de gaz de l'enceinte peut être réalisé.According to some other aspects of the invention, integral blades driven in rotation simultaneously with the metering member by the axis can promote the feeding of this member; scrapers driven by the axis simultaneously with the organ dosing improve the flow of the product on the internal face of the hopper; the above elements can be suspended from a load cell which allows permanent monitoring of the load and the regularity of the dosage; finally, the hopper and the metering device can be surrounded by a sealed enclosure which allows the operation to be confined by avoiding the dissemination of material which would be easily dispersible, and maintains atmospheric pressure or atmospheric conditions specific to the process that 'we undertake; a gas sweep of the enclosure can be carried out.
La nature particulière de l'invention sera mieux comprise au vu des figures suivantes qui en représentent deux réalisations principales : " la figure 1 -représente une coupe générale de l'appareil conçu comme un doseur simple,The particular nature of the invention will be better understood in the light of the following figures which represent two main embodiments thereof: "FIG. 1 - represents a general section of the apparatus designed as a simple metering device,
• et la figure 2 représente un organe de dosage également apte à broyer la matière dosée ; cet appareil pouvant remplacer l'organe de dosage dans l'appareil de la figure 1.• and Figure 2 shows a metering member also capable of grinding the metered material; this device being able to replace the metering member in the device of FIG. 1.
On se réfère désormais aux dessins et tout d'abord à la première figure.We now refer to the drawings and first of all to the first figure.
L'appareil comprend une trémie dont la partie basse est conique ; sur le dessus, un orifice permet le remplissage par une tuyauterie de chargement 13 ; la base de la trémie 1 est ouverte et équipée d'un organe de dosage. L'appareil comprend aussi un moteur 3 implanté sur le dessus de la trémie 1 et qui entraîne en rotation, par l'intermédiaire d'un axe 4 traversant la trémie et vertical, l'organe de dosage, qui est ici constitué par un disque 2 obturant partiellement la base de la trémie 1, s ' étendant sous elle et séparé de cette base par un jeu circulaire qui est fonction de la granulométrie du produit à doser et de la gamme de débit recherchés : le diamètre du disque 2 et le jeu permettent de délivrer un débit nul de produit quand l'axe 4 est au repos et un débit qui dépend de la vitesse de rotation, ainsi que de la largeur du jeu, dans le cas contraire. Dans cette réalisation, des racleurs 8 sont encore entraînés par l'axe 4 et consistent en des ailes qui s'étendent presque jusqu'à la face interne de la trémie 1. Les éléments -précédents sont suspendus à un peson 9 par l'intermédiaire d'une pièce appelée lanterne 10, en fait une enveloppe qui entoure et protège le moteur 3 , et qui mesure le poids de ces éléments et celui de la charge de produit à doser qui a été versée dans la trémie 1 : on peut ainsi contrôler à tout instant le degré de remplissage de la trémie 1 et la régularité du dosage. L'appareil comprend encore une enceinte étanche en deux parties, une enveloppe 11 à laquelle est adjointe un couvercle 12 et qui entoure les éléments précédents, le peson 9 étant fixé sous le couvercle 12 ; l'enceinte est traversée par la - tuyauterie de chargement 13 par laquelle on emplit la trémie, par une tuyauterie d'écoulement 14 à la base par laquelle s'écoule le produit dosé, et par des passages de connexion 15 pour des câbles électriques menant au moteur 3 et au peson 9 et qui s'achèvent par des prises déconnectables donnant sur l'extérieur ; elle peut aussi recevoir une tuyauterie de balayage de gaz 16 qui la traverse elle aussi et permet d'injecter du gaz pour donner une atmosphère de composition particulière ; l'enceinte permet aussi de maintenir une pression qui, selon sa valeur, interdit le risque de dissémination du produit dosé, ou permet de dégazer son contenu si nécessaire ,- si aucune précaution particulière ne doit être prise, l'enceinte peut être omise.The apparatus comprises a hopper whose bottom part is conical; on the top, an orifice allows filling by a loading pipe 13; the base of the hopper 1 is open and equipped with a metering member. The device also includes a motor 3 installed on top of the hopper 1 and which drives in rotation, by means of an axis 4 passing through the hopper and vertical, the metering member, which here consists of a disc 2 partially sealing the base of the hopper 1, extending beneath it and separated from this base by a circular clearance which is a function of the particle size of the product to be dosed and of the desired flow range: the diameter of the disc 2 and the clearance make it possible to deliver a zero flow of product when the axis 4 is at rest and a flow which depends on the speed of rotation, as well as on the width of the clearance, otherwise. In this embodiment, scrapers 8 are still driven by the axis 4 and consist of wings which extend almost to the internal face of the hopper 1. The preceding elements are suspended from a load cell 9 via of a part called lantern 10, in fact an envelope which surrounds and protects the motor 3, and which measures the weight of these elements and that of the load of product to be metered which has been poured into the hopper 1: one can thus control at any time the degree of filling of the hopper 1 and the regularity of the dosage. The apparatus further comprises a two-part sealed enclosure, an envelope 11 to which is attached a cover 12 and which surrounds the preceding elements, the load cell 9 being fixed under the cover 12; the enclosure is crossed by the - loading pipe 13 through which the hopper is filled, by a flow pipe 14 at the base through which the metered product flows, and by connection passages 15 for electrical cables leading to the motor 3 and to the load cell 9 and which end with disconnectable sockets facing the outside; it can also receive a gas sweeping pipe 16 which also passes through it and makes it possible to inject gas to give a atmosphere of particular composition; the enclosure also makes it possible to maintain a pressure which, depending on its value, prohibits the risk of dissemination of the metered product, or makes it possible to degas its contents if necessary, - if no particular precaution must be taken, the enclosure can be omitted.
L'appareil qui doit fonctionner dans des conditions de stabilité requises pour la régularité de dosage et la validité de la pesée peut cependant être intégré dans un système produisant des vibrations ; dans ce cas, les tuyauteries de liaison sont équipées de portions souples telles que des soufflets qui arrêteront les vibrations, et le support de l'ensemble dans le système pourra si nécessaire être raidi ou au contraire rendu 'flottant.The apparatus which must operate under conditions of stability required for regularity of dosage and validity of the weighing may however be integrated into a system producing vibrations; in this case, the connecting pipes are equipped with flexible portions such as bellows which will stop the vibrations, and the support of the assembly in the system may if necessary be stiffened or, on the contrary, made 'floating'.
L'appareil est équipé et réglé en fonction des conditions de service, de la matière solide utilisée et des débits recherchés. Après le chargement de la trémie, le moteur 3 est mis en marche à la vitesse donnant le .débit voulu pour faire s'écouler le produit à la périphérie du disque 2. La pesée régulière permet de contrôler l'opération. La section de passage entre le disque 2 et la base de la trémie 1 reste constante, ce qui permet de régler avec une grande stabilité le débit de dosage en fonction de la vitesse de rotation, quelle que soit la hauteur du produit dans la trémie 1 à la seule condition qu'il occupe toute la section du jeu. En d'autres termes, le jeu calibre l'écoulement de la matière à doser. Ces doseurs sont utilisés dans une installation de petite taille de vitrification de solutions radioactives, pour doser de petites quantités de déchets à faible débit. Deux types de produit y sont couramment dosés :The device is equipped and adjusted according to the operating conditions, the solid material used and the flow rates sought. After loading the hopper, the motor 3 is started at the speed giving the desired flow rate to cause the product to flow around the periphery of the disc 2. Regular weighing makes it possible to control the operation. The passage section between the disc 2 and the base of the hopper 1 remains constant, which makes it possible to adjust the metering flow rate with great stability as a function of the speed of rotation, whatever the height of the product in the hopper 1 on the only condition that it occupies the entire section of the game. In other words, the game calibrates the flow of the material to be dosed. These dosers are used in a small vitrification installation of radioactive solutions, for dosing small quantities of waste at low flow rates. Two types of product are commonly dosed there:
- de la fritte utilisée comme additif de vitrification, qui se présente sous forme de petites paillettes de taille habituelle autour de 2 mm ; sont dosées les charges allant jusqu'à 1,5 kg pour des débits typiques se situant autour de 300 g à- frit used as a vitrification additive, which is in the form of small flakes of usual size around 2 mm; loads of up to 1.5 kg are dosed for typical flow rates of around 300 g at
1 ' heure ,- - du calcinât : il s'agit du résidu sec de la calcination des solutions à vitrifier. Il se présente sous la forme de grains friables de granulométrie assez dispersée ; ces grains sont broyés et dosés simultanément, ce qui permet d'obtenir à la fois un débit régulier, une granulométrie finale (environ 2 mm pour cette application) optimale pour la qualité de la vitrification, et l'absence de rétention dans le doseur ; sont dosées des charges allant jusqu'à 450 g pour des débits typiquement autour de 80 g à1 hour, - - calcine: this is the dry residue from the calcination of the solutions to be vitrified. It is in the form of friable grains of fairly dispersed particle size; these grains are ground and dosed simultaneously, which makes it possible to obtain both a regular flow rate, a final particle size (about 2 mm for this application) optimal for the quality of the vitrification, and the absence of retention in the doser; are metered loads of up to 450 g for flow rates typically around 80 g to
1 ' heure .1 hour .
Ce type de dosage est également envisageable pour l'alimentation de pièces plus ou moins calibrées dans des procédés de fusion des métaux comme par exemple la refusion des déchets de gainage des combustibles nucléaires. Mais de manière générale, ces appareils peuvent être utilisés pour le dosage et le broyage de matières solides divisées.This type of metering is also possible for feeding more or less calibrated parts in metal smelting processes such as for example the remelting of cladding waste from nuclear fuels. In general, however, these devices can be used for dosing and grinding divided solid matter.
Dans la réalisation de la figure 2, le disque 2 est remplacé par une vrille 5 qui s'étend à travers l'embouchure de la trémie 1 et qui permet non seulement de doser, mais de broyer et de calibrer le produit s ' échappant de la trémie 1 ; l'embouchure 6 de la trémie est alors équipée de rainures 17 verticales ou obliques ; des pales 7, solidaires de l'axe 4 en rotation, et qui sont inclinées dans ce sens de rotation, produisent une force descendante sur le contenu de la trémie 1 et le dirigent vers la vrille 5 pour favoriser son alimentation et le dosage. Les grains du solide à doser quittent la trémie 1 à travers le jeu circulaire (ici vertical sensiblement, alors qu'il était horizontal avec le disque 2) formé entre la vrille 5 et l'embouchure 6, tout en étant broyés entre les filets de la vrille 5 et les crêtes entre rainures 17 de l'embouchure 6. Ce jeu a, en allant vers le bas, d'abord une largeur décroissante qui favorise la régularité du dosage et du broyage, puis une largeur constante, l'embouchure 6 ayant une conicité variable qui devient parallèle à celle de la vrille 5. Ici aussi le débit de dosage est proportionnel à la vitesse de rotation de la vrille 5 en fonction de la largeur du jeu.In the embodiment of Figure 2, the disc 2 is replaced by a spin 5 which extends through the mouth of the hopper 1 and which allows not only to dose, but to grind and to calibrate the product escaping from the hopper 1; the mouth 6 of the hopper is then fitted with vertical or oblique grooves 17; blades 7, integral with the axis 4 in rotation, and which are inclined in this direction of rotation, produce a downward force on the contents of the hopper 1 and direct it towards the spin 5 to promote its feeding and the dosage. The grains of the solid to be dosed leave the hopper 1 through the circular clearance (here substantially vertical, while it was horizontal with the disc 2) formed between the spin 5 and the mouth 6, while being ground between the threads the spin 5 and the ridges between grooves 17 of the mouth 6. This game has, going downwards, first of a decreasing width which favors the regularity of the metering and of the grinding, then a constant width, the mouth 6 having a variable taper which becomes parallel to that of the spinner 5. Here also the metering flow rate is proportional to the speed of rotation of the spinner 5 as a function of the width of the clearance.
Il est clair que de nombreuses autres formes de rotation sont possibles, avec des organes de dosage ou de broyage différents, et des combinaisons quelconques d'éléments optionnels tels que les pales 7 et les racleurs 8. It is clear that many other forms of rotation are possible, with different metering or grinding members, and any combination of optional elements such as blades 7 and scrapers 8.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9912823A FR2799836B1 (en) | 1999-10-14 | 1999-10-14 | SOLID MATERIAL DOSER |
| FR99/12823 | 1999-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001027566A1 true WO2001027566A1 (en) | 2001-04-19 |
Family
ID=9550928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2000/002858 Ceased WO2001027566A1 (en) | 1999-10-14 | 2000-10-13 | Doser for solid matter |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2799836B1 (en) |
| WO (1) | WO2001027566A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2240511C1 (en) * | 2003-01-30 | 2004-11-20 | Самарская государственная академия путей сообщения (СамГАПС) | Batcher for loose materials |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2293952C1 (en) * | 2005-10-14 | 2007-02-20 | Общество с ограниченной ответственностью "Ставрон" | Batcher for free-flowing substances |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1146448A (en) * | 1956-04-05 | 1957-11-12 | Etablissements Daubron Soc D | Powder feeder |
| GB804408A (en) * | 1955-11-16 | 1958-11-12 | Anna Guenther | Colloid mill with pre-cutting attachment |
| US3804303A (en) * | 1971-03-05 | 1974-04-16 | A Fassauer | System for metering particulate material |
| US3845886A (en) * | 1972-11-17 | 1974-11-05 | T Kokeisl | Device for metering flowable solids from a container |
| US4040570A (en) * | 1971-08-31 | 1977-08-09 | Wasag Chemie Gmbh | Preparation of uniform black powder granules |
| DE3933763A1 (en) * | 1989-10-10 | 1991-04-18 | Eberhard Jost | Weighing arrangement for bulk material - has weighing container with casing raisable w.r.t. conical base for emptying and suspended from weighing cell |
| US5709322A (en) * | 1995-12-08 | 1998-01-20 | Acrison, Inc. | Dry solids metering system with means for self-emptying and quick-emptying/cleanout |
-
1999
- 1999-10-14 FR FR9912823A patent/FR2799836B1/en not_active Expired - Fee Related
-
2000
- 2000-10-13 WO PCT/FR2000/002858 patent/WO2001027566A1/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB804408A (en) * | 1955-11-16 | 1958-11-12 | Anna Guenther | Colloid mill with pre-cutting attachment |
| FR1146448A (en) * | 1956-04-05 | 1957-11-12 | Etablissements Daubron Soc D | Powder feeder |
| US3804303A (en) * | 1971-03-05 | 1974-04-16 | A Fassauer | System for metering particulate material |
| US4040570A (en) * | 1971-08-31 | 1977-08-09 | Wasag Chemie Gmbh | Preparation of uniform black powder granules |
| US3845886A (en) * | 1972-11-17 | 1974-11-05 | T Kokeisl | Device for metering flowable solids from a container |
| DE3933763A1 (en) * | 1989-10-10 | 1991-04-18 | Eberhard Jost | Weighing arrangement for bulk material - has weighing container with casing raisable w.r.t. conical base for emptying and suspended from weighing cell |
| US5709322A (en) * | 1995-12-08 | 1998-01-20 | Acrison, Inc. | Dry solids metering system with means for self-emptying and quick-emptying/cleanout |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2240511C1 (en) * | 2003-01-30 | 2004-11-20 | Самарская государственная академия путей сообщения (СамГАПС) | Batcher for loose materials |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2799836B1 (en) | 2001-11-23 |
| FR2799836A1 (en) | 2001-04-20 |
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