EP0752273B1 - Vertical-shaft crusher - Google Patents

Vertical-shaft crusher Download PDF

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Publication number
EP0752273B1
EP0752273B1 EP19960401485 EP96401485A EP0752273B1 EP 0752273 B1 EP0752273 B1 EP 0752273B1 EP 19960401485 EP19960401485 EP 19960401485 EP 96401485 A EP96401485 A EP 96401485A EP 0752273 B1 EP0752273 B1 EP 0752273B1
Authority
EP
European Patent Office
Prior art keywords
grid
hammers
grill
vertical
grinder
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.)
Expired - Lifetime
Application number
EP19960401485
Other languages
German (de)
French (fr)
Other versions
EP0752273A1 (en
Inventor
Gérard Pierre Heurgue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HEURGUE CONSEIL SA
Original Assignee
HEURGUE CONSEIL SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HEURGUE CONSEIL SA filed Critical HEURGUE CONSEIL SA
Publication of EP0752273A1 publication Critical patent/EP0752273A1/en
Application granted granted Critical
Publication of EP0752273B1 publication Critical patent/EP0752273B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/282—Shape or inner surface of mill-housings
    • B02C13/284—Built-in screens

Definitions

  • the present invention relates to improvements vertical shredders.
  • a vertical crusher consists of a drive shaft on which are keyed discs having at their periphery articulated hammers, this assembly being housed in an enclosure cylindrical, the lateral part of which consists of a grid, the products to be ground being introduced at the top of said pregnant.
  • the device described in this document does not, in particular, compensate, in a satisfactory manner, the wear of the hammers so as to that this has no influence on the particle size.
  • the present invention which remedies these drawbacks, relates a grinder comprising a grid in the form of a cylindrical shell which can be moved axially relative to the axis hammer drive, said crusher being characterized in that the grid consists of a ferrule without perforation in its part upper and having perforations at its lower part, the grain size adjustment by moving the bottom edge of the grid in relation to the hammers.
  • the crusher has a first grid in the form of a ferrule cylindrical which can be moved axially relative to the axis of the hammers, and it is characterized in that it comprises a second grid, the two grids being coaxial and superimposed and having different characteristics, the grain size adjustment being carried out by moving the lower edge of the assembly, formed by the two grids, compared to hammers.
  • the grinder is consisting of discs 1, driven by a shaft 2 with a vertical axis, each of said discs comprising hammers 3 at its periphery.
  • This set is arranged in a delimited enclosure, laterally, by a cylindrical grid 4, at the bottom, by a bottom 5 and, above, by the lower part 6 of a loading hopper 7.
  • the mill is completed by a cylindrical ferrule 8 spanning between its face internal and the grid 4 an annular space 9 for recovering grinds.
  • the products to be ground are introduced from above and are subjected to the action of the first stage of hammers. As a result of this action, a certain part of the product passes through the grid 4 while the rest is taken up by the lower stage of the mill and so on.
  • the result obtained depends on a certain number of parameters such as: the grid mesh dimensions, the distance from the end of the hammers, the number of hammer stages and their rotational speed. he So it turns out that the only parameter on which it is easy to act is the speed of rotation of the hammers. Experience has shown that this adjustment was insufficient given the different situations that the grinder is used.
  • the grid 4 which is in the form a cylindrical shell, can be moved along the axis of the shaft 2 hammer drive.
  • the grid 4 is maintained by two rings 10 joined by columns 11 comprising, of preferably, the aforementioned guide members.
  • Figure 2 shows the position of the movable grid of the invention for a product and a given particle size.
  • the term "grain size" is not entirely correct because in many many cases what is sought is an end product with a certain percentage of very fine grains compared to a average particle size.
  • the grid 4 will be located towards the the higher the percentage of very fine grains will be low and Conversely.
  • the crusher can include two grids 4 and 4a as shown in FIG. 2.
  • the grid 4a has perforations whose dimensions are different from those in grid 4.
  • the characteristics of the grid 4a are different from those in grid 4.
  • the diameter of the grid 4a is different from that of grid 4. This characteristic which makes it possible to cooperate in adjusting the particle size allows also to compensate for the wear of the hammers and to reduce the time intervention on these.
  • the grid 4a is used; after a certain wear, grid 4 is used.
  • the mesh dimensions of the two grids are, from preferably identical.
  • the crusher of the invention can have more than two grids mobile.
  • the same grid can present different diameters.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)

Description

La présente invention est relative à des perfectionnements aux broyeurs verticaux.The present invention relates to improvements vertical shredders.

Un broyeur vertical se compose d'un arbre d'entraínement sur lequel sont clavetés des disques comportant à leur périphérie des marteaux articulés, cet ensemble étant logé dans une enceinte cylindrique dont la partie latérale est constituée par une grille, les produits à broyer étant introduits à la partie supérieure de ladite enceinte.A vertical crusher consists of a drive shaft on which are keyed discs having at their periphery articulated hammers, this assembly being housed in an enclosure cylindrical, the lateral part of which consists of a grid, the products to be ground being introduced at the top of said pregnant.

Par le document EP-A-0 525 362, on connaít un broyeur comportant une grille cylindrique pouvant être déplacée selon l'axe de rotation des marteaux.By document EP-A-0 525 362, we know a grinder comprising a cylindrical grid which can be moved along the axis of hammer rotation.

Le dispositif décrit dans ce document ne permet pas, notamment, de compenser, de façon satisfaisante, l'usure des marteaux de façon à ce que celle-ci soit sans influence sur la granulométrie.The device described in this document does not, in particular, compensate, in a satisfactory manner, the wear of the hammers so as to that this has no influence on the particle size.

La présente invention, qui remédie à ces inconvénients, concerne un broyeur comportant une grille se présentant sous la forme d'une virole cylindrique pouvant être déplacée axialement par rapport à l'axe d'entraínement des marteaux, ledit broyeur étant caractérisé en ce que la grille est constituée par une virole sans perforation à sa partie supérieure et comportant des perforations à sa partie inférieure, le réglage de la granulométrie s'effectuant en déplaçant le bord inférieur de la grille par rapport aux marteaux.The present invention, which remedies these drawbacks, relates a grinder comprising a grid in the form of a cylindrical shell which can be moved axially relative to the axis hammer drive, said crusher being characterized in that the grid consists of a ferrule without perforation in its part upper and having perforations at its lower part, the grain size adjustment by moving the bottom edge of the grid in relation to the hammers.

Selon une autre caractéristique de l'invention, le broyeur comporte une première grille se présentant sous la forme d'une virole cylindrique pouvant être déplacée axialement par rapport à l'axe des marteaux, et il est caractérisé en ce qu'il comporte une seconde grille, les deux grilles étant coaxiales et superposées et présentant des caractéristiques différentes, le réglage de la granulométrie s'effectuant en déplaçant le bord inférieur de l'ensemble, formé par les deux grilles, par rapport aux marteaux.According to another characteristic of the invention, the crusher has a first grid in the form of a ferrule cylindrical which can be moved axially relative to the axis of the hammers, and it is characterized in that it comprises a second grid, the two grids being coaxial and superimposed and having different characteristics, the grain size adjustment being carried out by moving the lower edge of the assembly, formed by the two grids, compared to hammers.

D'autres caractéristiques et avantages de l'invention ressortiront mieux par la description qui va suivre faite en se reférant aux dessins annexés à titre d'exemple indicatif, seulement, sur lesquels :

  • la figure 1 est une vue en coupe verticale d'un broyeur conforme à l'invention;
  • la figure 2 est une vue, très schématique, analogue à celle 1, montrant une variante de réalisation.
Other characteristics and advantages of the invention will emerge more clearly from the description which follows, given with reference to the accompanying drawings by way of indicative example only, in which:
  • Figure 1 is a vertical sectional view of a mill according to the invention;
  • Figure 2 is a view, very schematic, similar to that 1, showing an alternative embodiment.

En se reportant aux dessins, on voit que le broyeur est constitué par des disques 1, entraínés par un arbre 2 à axe vertical, chacun desdits disques comportant à sa périphérie des marteaux 3. Cet ensemble est disposé dans une enceinte délimitée, latéralement, par une grille cylindrique 4, en bas, par un fond 5 et, en haut, par la partie inférieure 6 d'une trémie de chargement 7. Le broyeur est complété par une virole cylindrique 8 ménageant entre sa face interne et la grille 4 un espace annulaire 9 de récupération des moutures.Referring to the drawings, it can be seen that the grinder is consisting of discs 1, driven by a shaft 2 with a vertical axis, each of said discs comprising hammers 3 at its periphery. This set is arranged in a delimited enclosure, laterally, by a cylindrical grid 4, at the bottom, by a bottom 5 and, above, by the lower part 6 of a loading hopper 7. The mill is completed by a cylindrical ferrule 8 spanning between its face internal and the grid 4 an annular space 9 for recovering grinds.

Les produits à broyer sont introduits par le haut et sont soumis à l'action du premier étage de marteaux. A la suite de cette action, une certaine partie du produit traverse la grille 4 tandis que le reste est repris par l'étage inférieur du broyeur et ainsi de suite.The products to be ground are introduced from above and are subjected to the action of the first stage of hammers. As a result of this action, a certain part of the product passes through the grid 4 while the rest is taken up by the lower stage of the mill and so on.

Le résultat obtenu dépend d'un certain nombre de paramètres tels que : les dimensions des mailles de la grille, la distance séparant celle-ci de l'extrémité des marteaux, le nombre d'étages de marteaux et la vitesse de rotation de ces derniers. Il s'avère donc que le seul paramètre sur lequel il est facile d'agir est la vitesse de rotation des marteaux. L'expérience a montré que ce réglage était insuffisant compte tenu des différentes situations selon lesquelles le broyeur est utilisé.The result obtained depends on a certain number of parameters such as: the grid mesh dimensions, the distance from the end of the hammers, the number of hammer stages and their rotational speed. he So it turns out that the only parameter on which it is easy to act is the speed of rotation of the hammers. Experience has shown that this adjustment was insufficient given the different situations that the grinder is used.

Selon l'invention, la grille 4, qui se présente sous la forme d'une virole cylindrique, peut être déplacée selon l'axe de l'arbre 2 d'entraínement des marteaux.According to the invention, the grid 4, which is in the form a cylindrical shell, can be moved along the axis of the shaft 2 hammer drive.

Naturellement, des moyens sont prévus pour guider la grille. Ces moyens sont à la portée de l'homme de l'art et non pas été représentés. A titre d'exemple on peut concevoir que la grille 4 présente des patins, ou analogues, guidés sur trois rails verticaux disposés contre la paroi interne de la virole 8. On peut concevoir, également que le déplacement de la grille soit assuré par un, ou plusieurs , vérin disposé dans l'espace annulaire 9.Naturally, means are provided to guide the grid. These means are within the reach of those skilled in the art and not been represented. As an example, we can imagine that the grid 4 has skids, or the like, guided on three vertical rails arranged against the internal wall of the shell 8. It is conceivable, also that the movement of the grid is ensured by a, or several, jack arranged in the annular space 9.

Selon un mode de réalisation, la grille 4 est maintenue par deux anneaux 10 réunis par des colonnes 11 comportant, de préférence, les organes de guidage précités.According to one embodiment, the grid 4 is maintained by two rings 10 joined by columns 11 comprising, of preferably, the aforementioned guide members.

La figure 2 montre la position de la grille mobile de l'invention pour un produit et une granulométrie donnée. En fait, le terme "granulométrie" n'est pas tout à fait exact car dans de nombreux cas ce qui est recherché c'est un produit final comportant un certain pourcentage de grains très fins par rapport à une granulométrie moyenne. Ainsi, dans le cas de la figure 2 et pour une vitesse de rotation donnée, plus la grille 4 sera située vers le haut plus le pourcentage de grains très fins sera faible et inversement.Figure 2 shows the position of the movable grid of the invention for a product and a given particle size. In fact, the the term "grain size" is not entirely correct because in many many cases what is sought is an end product with a certain percentage of very fine grains compared to a average particle size. Thus, in the case of FIG. 2 and for a given speed, the more the grid 4 will be located towards the the higher the percentage of very fine grains will be low and Conversely.

On peut concevoir une grille mixte c'est-à-dire ne comportant des perforations que vers sa partie inférieure.We can design a mixed grid, i.e. one that does not include perforations only towards its lower part.

Il ressort de l'invention que, par un déplacement judicieux de la grille (4-10-11) il est possible de démasquer totalement les marteaux 3 pour permettre leur remplacement à partir d'une ouverture 12 prévue dans la virole 8 et normalement obturée par un volet, non représenté.It emerges from the invention that, by judicious displacement of the grid (4-10-11) it is possible to completely unmask the hammers 3 to allow their replacement from a opening 12 provided in the shell 8 and normally closed by a shutter, not shown.

Selon une autre caractéristique de l'invention, le broyeur peut comporter deux grilles 4 et 4a comme cela ressort de la figure 2.According to another characteristic of the invention, the crusher can include two grids 4 and 4a as shown in FIG. 2.

La grille 4a présente des perforations dont les dimensions sont différentes de celles de la grille 4.The grid 4a has perforations whose dimensions are different from those in grid 4.

D'une façon générale les caractéristiques de la grille 4a sont différentes de celles de la grille 4.In general, the characteristics of the grid 4a are different from those in grid 4.

Selon une caractéristique de l'invention le diamètre de la grille 4a est différent de celui de la grille 4. Cette caractéristique qui permet de coopérer au réglage de la granulométrie permet aussi de compenser l'usure des marleaux et de réduire le temps d'intervention sur ces derniers. Lorsque les marteaux sont neufs, la grille 4a est utilisée; après une certaine usure, on utilise la grille 4. Dans ce cas, les dimensions des mailles des deux grilles sont, de préférence, identiques.According to a characteristic of the invention, the diameter of the grid 4a is different from that of grid 4. This characteristic which makes it possible to cooperate in adjusting the particle size allows also to compensate for the wear of the hammers and to reduce the time intervention on these. When the hammers are new, the grid 4a is used; after a certain wear, grid 4 is used. In this case, the mesh dimensions of the two grids are, from preferably identical.

Le broyeur de l'invention peut comporter plus de deux grilles mobiles. The crusher of the invention can have more than two grids mobile.

Bien entendu, la présente invention ne se limite pas aux modes de réalisation décrits et représentés, mais s'étend au contraire à toutes variantes de formes et dimensions.Of course, the present invention is not limited to embodiments described and shown, but extends to contrary to all variants of shapes and dimensions.

C'est ainsi, entre autres, que la même grille peut présenter des diamètres différents.Thus, among other things, the same grid can present different diameters.

Claims (3)

  1. Grinder with vertical axis comprising a grill (4) appearing in the form of a cylindrical ferrule able to be moved axially with respect to the drive axis of hammers (3), characterised in that the grill (4) is constituted by a ferrule having no perforations at its upper portion and comprising perforations at its lower portion, the adjustment of the size grading being effected by moving the lower edge of the grill (4) with respect toe hammers.
  2. Vertical grinder comprising a first grill (4) appearing in the form of a cylindrical ferrule able to be moved axially with respect to the axis of the hammers, characterised in that the grinder comprises a second grill (4a), the two grills (4, 4a) being coaxial and superimposed and having different characteristics, the adjustment of the size grading being effected by moving the lower edge of the unit formed by the grills (4, 4a) with respect to the hammers.
  3. Grinder according to claim 2, characterised in that the diameters of the grills (4, 4a) are different.
EP19960401485 1995-07-07 1996-07-05 Vertical-shaft crusher Expired - Lifetime EP0752273B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9508225A FR2736283B1 (en) 1995-07-07 1995-07-07 VERTICAL AXIS CRUSHER
FR9508225 1995-07-07

Publications (2)

Publication Number Publication Date
EP0752273A1 EP0752273A1 (en) 1997-01-08
EP0752273B1 true EP0752273B1 (en) 2002-06-12

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ID=9480780

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Application Number Title Priority Date Filing Date
EP19960401485 Expired - Lifetime EP0752273B1 (en) 1995-07-07 1996-07-05 Vertical-shaft crusher

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EP (1) EP0752273B1 (en)
DE (1) DE69621702D1 (en)
ES (1) ES2177744T3 (en)
FR (1) FR2736283B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1506815B1 (en) * 2003-08-13 2007-10-17 Satake Corporation Impact grinding apparatus for cereal

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2227090A (en) * 1940-04-01 1940-12-31 Don E Hughes Crushing and grinding machine
FR1288196A (en) * 1961-02-09 1962-03-24 Comm Salins Du Midi Soc Multifunctional grinding machine
ZA717546B (en) * 1971-11-09 1972-12-27 V Acton Improvements in impact crushers
ES2005139A6 (en) * 1987-04-09 1989-03-01 Martinez Aranda Santiago Mill with beaters
DE8810234U1 (en) * 1988-08-12 1988-09-22 Torfwerk Gebr. Brill Gmbh & Co. Kg, 4458 Georgsdorf, De
CH684059A5 (en) * 1991-07-22 1994-07-15 Buehler Ag Hammer mill.

Also Published As

Publication number Publication date
FR2736283A1 (en) 1997-01-10
ES2177744T3 (en) 2002-12-16
FR2736283B1 (en) 1997-09-26
DE69621702D1 (en) 2002-07-18
EP0752273A1 (en) 1997-01-08

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