EP1964612B1 - Beater mill for crushing and/or grinding mineral matter comprising automated adjustment means - Google Patents

Beater mill for crushing and/or grinding mineral matter comprising automated adjustment means Download PDF

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Publication number
EP1964612B1
EP1964612B1 EP20080360002 EP08360002A EP1964612B1 EP 1964612 B1 EP1964612 B1 EP 1964612B1 EP 20080360002 EP20080360002 EP 20080360002 EP 08360002 A EP08360002 A EP 08360002A EP 1964612 B1 EP1964612 B1 EP 1964612B1
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EP
European Patent Office
Prior art keywords
frame
shock
beaters
stationary
shields
Prior art date
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Not-in-force
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EP20080360002
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German (de)
French (fr)
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EP1964612A1 (en
Inventor
Xavier Steiner
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Krupp Hazemag SAS
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Krupp Hazemag SAS
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Publication of EP1964612A1 publication Critical patent/EP1964612A1/en
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    • 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
    • B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
    • B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
    • B02C13/09—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate
    • B02C13/095—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate with an adjustable anvil or impact plate
    • 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
    • B02C13/31—Safety devices or measures

Definitions

  • the present invention relates to the general technical field of percussion machines for crushing and / or grinding fragments of mineral matter.
  • the machines concerned by the present invention are generally primary, secondary and tertiary crushers or grinders making it possible to process fragments or blocks of large dimensions, for example between 50 and 1000 mm) in order to reduce them to obtain different particle sizes.
  • a crusher is for example described in the document DE 39 11 086 A1 .
  • mineral matter it is meant any material used with different grain sizes that can meet specific standards for the realization of eg roads or buildings.
  • These machines are also used for the manufacture of sand and for the recycling of building materials such as concrete or bricks.
  • the known machines are generally constructed and dimensioned for particular applications, namely the treatment of low or medium abrasive mineral materials.
  • low or medium abrasive mineral materials By way of example, mention may be made of limestone.
  • the object of the present invention is to overcome the disadvantages presented above, by facilitating the adjustment operations of the machine.
  • the adjustment means comprise, on the one hand on each lateral side of the frame, a hydraulic cylinder comprising a cylinder rod and a cylinder connected respectively to the support structure and to a sliding mobile console. relative to a fixed part of the frame, and secondly electrical or electronic control means controlling the displacement of the cylinder rod, thus defining different lengths of cylinder, which each correspond to a determined spacing between the shock shields and the beaters.
  • the mobile console rests, in normal operation of the machine and when adjusting the distance between the impact screens and the beaters, on a fixed stop of the frame.
  • the support structure movable relative to the frame, is a cross member extending outside the frame and protruding with its ends on the lateral sides of the frame, for mounting the adjustment means and security means on said ends.
  • the impact screens are connected to the cross member via connecting rods passing through a wall of the frame.
  • Another object of the present invention is to provide a machine with extremely simple security means, inexpensive and able to cooperate with the adjustment means.
  • the machine according to the invention thus has the advantage that the initial setting of the shock screens is not altered during the passage of an uncrushable element.
  • the safety means cooperate with the hydraulic cylinder whose length does not change outside adjustment operations.
  • the hydraulic cylinder thus constitutes a simple connecting rod during passage of a non-breakable element in the machine, no damping or booster function being assigned to said hydraulic cylinder.
  • the complementary rod comprises at least one threaded portion on which is mounted the movable stop whose positioning by screwing allows to preload the return spring.
  • the adjustment means and the security means are for example juxtaposed. Simultaneous access to the adjustment means and the safety means on each lateral side of the machine facilitates inspection and maintenance operations.
  • a machine according to the invention is for example represented in the figure 1 .
  • This machine comprises a frame comprising a fixed base (1) supporting a fixed central portion (2), and a tilting rear portion (3).
  • the tilting rear part (3) is articulated on the fixed central part (2) by means of a hinge pin (5). It is possible with the opening of the frame to intervene inside the machine for maintenance operations.
  • An access window (2a), for example to control adjustment operations is also provided on the frame.
  • a rotor (6) driven by a motor (not shown) is rotatably mounted in the machine and in particular downwards in the fixed central portion (2).
  • the rotor (6) consists for example of a central tube (7) secured by any known means with a rotation shaft (8).
  • the rotor (6) also includes mechanically welded discs (not shown) on the central tube (7), to support the beaters.
  • the machine represented in figure 1 also comprises shock screens (9) on which shock plates (10) are mounted. Wear more or less marked shock plates (10) depending on their positioning relative to the rotor (6) imposes particular shapes and dimensions for said impact plates (10).
  • Adjusting means (11) for increasing and decreasing the distance between the impact screens (9) and the trajectory (6a) of the beaters are also provided.
  • the difference obtained through the adjustment means (11) is a function of the treated mineral material and the particle size desired for the final material.
  • the fixed central portion (2) is also provided with a feed opening (12) located substantially above an extension zone of the rotor (6).
  • the machine according to the invention is represented in closed configuration at the figure 1 .
  • the rear part (3) can be tilted in its open position by pivoting about the axis (5). This tilting operation is assisted by at least one hydraulic cylinder (not shown) articulated on the fixed base (1) and on an anchor point of the rear portion (3).
  • the figure 2 represents in partial section the adjustment means (11) actuated by means of a hydraulic cylinder (13).
  • the adjusting means (11) extend on each lateral side of the rear part (3) of the frame and are connected to the support structure.
  • the latter consists of a cross member (14) external to the rear portion (3), to change by its displacement, the position of the shock screens (9) relative to the rotor (6).
  • a connecting rod (15) is fixed by a first end (15a) on the cross member (14) and articulated on the shock screen (9) by a second end (15b).
  • the crossbar (14) has for example a U-shaped cross section, the bottom (14a) has an opening (14b) through which a complementary rod (16). The latter is also fixed on said cross member (14).
  • the hydraulic jack (13) is extended or contracted, causing the complementary rod (16) to be translated relative to a fixed stop (17) of the frame and therefore a displacement of the cross member (14) relative to the frame.
  • the shock screen (9) deviates from the rotor (6) exerting a strong thrust on the cross member (14).
  • the latter carries with it the complementary rod (16) and a movable stop (18) screwed on the free end of the complementary rod (16). It results from this displacement a compression of a return spring (19) bearing with its ends respectively on the fixed stops (17) and movable (18).
  • the hydraulic cylinder (13) consists of a cylinder rod (13a) and a cylinder (13b) as shown for example in figures 2 and 4 .
  • the stem of cylinder (13a) is articulated on the crossmember (14) and the cylinder (13b) cylinder is articulated on a mobile bracket (20).
  • This mobile bracket (20) is supported on a stop (21) integral with the frame and more particularly the rear portion (3).
  • This mobile bracket (20) for example supports a buffer (22) disposed between the stop (21) and said movable bracket (20).
  • Guide grooves (23) are also provided on the fixed part (3), in which is engaged a wall (20a) of the mobile bracket (20). The latter can slide in the grooves (23) when the crossbar (14) is raised and when the hydraulic cylinder (13) is in a frozen state, that is to say outside adjustment operations.
  • the complementary rods (16) secured to the crossmember (14) drive the movable stop (18) and compress the return spring (19), which will allow, through its restoring force, to bring back the impact shields ( 9) in their initial setting position.
  • the movable bracket (20) is driven upwardly to the extent that the hydraulic cylinder (13) is in a frozen state and its length is not changed.
  • the hydraulic cylinder (13) is associated with a hydraulic supply comprising a double ball valve (13c).
  • the latter actuates the hydraulic cylinders (13) when the user acts on the valves controlling said hydraulic cylinders (13).
  • the double ball valve (13c) remains closed, preventing any transfer of hydraulic fluid between the chambers of each cylinder (13). The latter then plays the role of a simple rigid connecting rod.
  • the hydraulic cylinder (13) is also dimensioned so as to give the cylinder rod (13a) an optimum stroke.
  • the latter makes it possible to obtain a length of the hydraulic cylinder (13) in a maximum contracted state, by which the impact plates (10) mounted on the impact screens (9) come into contact with the beaters mounted on the rotor (6). It is therefore appropriate in an initial setting of the machine, to respect or not to go beyond a given contraction of the hydraulic cylinder (13), to prevent the shock plates (10) from extending over the trajectories of the beaters. This allows, as and when wear of the beaters and shock plates (10) to readjust the relative positioning between said shock plates (10) and the beaters, to compensate for said wear.

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

Description

La présente invention se rapporte au domaine technique général des machines à percussion pour le concassage et/ou le broyage de fragments de matières minérales. Les machines concernées par la présente invention sont en général des concasseurs ou broyeurs primaires, secondaires et tertiaires permettant de traiter des fragments ou des blocs de dimensions importantes par exemple entre 50 et 1 000 mm) afin de les réduire pour obtenir différentes granulométries. Un tel concasseur est par exemple décrit dans le document DE 39 11 086 A1 . Par matière minérale, il convient d'entendre toute matière utilisée avec différentes granulométries pouvant répondre à des normes déterminées pour la réalisation par exemple de routes ou de bâtiments. Ces machines sont également utilisées pour la fabrication de sable et pour le recyclage de matériaux de construction du type béton ou briques.The present invention relates to the general technical field of percussion machines for crushing and / or grinding fragments of mineral matter. The machines concerned by the present invention are generally primary, secondary and tertiary crushers or grinders making it possible to process fragments or blocks of large dimensions, for example between 50 and 1000 mm) in order to reduce them to obtain different particle sizes. Such a crusher is for example described in the document DE 39 11 086 A1 . By mineral matter, it is meant any material used with different grain sizes that can meet specific standards for the realization of eg roads or buildings. These machines are also used for the manufacture of sand and for the recycling of building materials such as concrete or bricks.

On connaît par exemple des machines à percussion pour le concassage ou le broyage de fragments d'une matière minérale, en vue d'obtenir une matière finale présentant une granulométrie déterminée, comportant :

  • un bâti comprenant une base fixe supportant une partie centrale fixe, une partie arrière basculante et une partie avant basculante articulées sur la partie centrale,
  • des plaques de blindages recouvrant les faces intérieures des parois du bâti,
  • un rotor d'axe horizontal, logé dans le bâti et supportant des battoirs,
  • un moteur entraînant en rotation le rotor,
  • des écrans de chocs sur lesquels sont montées des plaques de chocs, les battoirs projetant des fragments de matière minérale sur lesdites plaques de chocs,
  • des moyens de réglage pour augmenter et diminuer l'écart entre les écrans de chocs et la trajectoire des battoirs en fonction de la matière minérale et de la granulométrie recherchée,
  • une ouverture d'alimentation en matière minérale dans la partie centrale fixe, localisée sensiblement au dessus d'une zone d'extension du rotor,
  • une ouverture d'évacuation ménagée dans la base fixe pour l'évacuation par gravité de la matière finale,
  • et des moyens de sécurité écartant davantage les écrans de chocs de la trajectoire des battoirs de manière à réaliser un passage pour des fragments imbroyables, et rappelant les écrans de chocs dans leur position de réglage initial après le passage des fragments imbroyables.
For example, percussion machines are known for crushing or grinding fragments of a mineral material, in order to obtain a final material having a determined particle size, comprising:
  • a frame comprising a fixed base supporting a fixed central part, a tilting rear part and a tilting front part articulated on the central part,
  • armor plates covering the inner faces of the walls of the frame,
  • a rotor of horizontal axis, housed in the frame and supporting beaters,
  • a motor driving the rotor in rotation,
  • shock screens on which shock plates are mounted, the beaters projecting fragments of mineral material on said impact plates,
  • adjusting means for increasing and decreasing the distance between the impact screens and the trajectory of the beaters as a function of the mineral material and the desired grain size,
  • a mineral feed opening in the fixed central portion, located substantially above an extension zone of the rotor,
  • an evacuation opening in the fixed base for gravity evacuation of the final material,
  • and security means further spacing the impact screens from the trajectory of the beaters so as to make a passage for uncreachable fragments, and recalling the shock screens in their initial setting position after the passage of unburnable fragments.

Les machines connues sont en général construites et dimensionnées pour des applications particulières, à savoir le traitement de matières minérales peu ou moyennement abrasives. A titre d'exemple, on peut citer le calcaire.The known machines are generally constructed and dimensioned for particular applications, namely the treatment of low or medium abrasive mineral materials. By way of example, mention may be made of limestone.

Les machines connues présentent l'inconvénient de comporter des moyens de réglage manuels pour ajuster le positionnement des écrans de chocs disposés sur une partie haute du bâti et en particulier sur la partie arrière basculante du bâti. Pour les machines de très grande taille, l'utilisateur doit accéder à la partie haute de la machine pour procéder au réglage des écrans de chocs. Les opérations de réglage ainsi effectuées augmentent substantiellement les risques d'accident pour l'utilisateur. En outre un tel réglage manuel est souvent long et fatiguant.Known machines have the disadvantage of having manual adjustment means for adjusting the positioning of shock screens disposed on an upper part of the frame and in particular on the tilting rear part of the frame. For very large machines, the user must access the top of the machine to adjust the impact screens. The adjustment operations thus performed substantially increase the risk of accident for the user. In addition, such manual adjustment is often long and tiring.

Pour obtenir un réglage précis du positionnement des écrans de chocs grâce à des moyens de réglage manuels, il est nécessaire d'y consacrer du temps. Cet inconvénient est accentué par le fait que les opérations de réglage doivent s'effectuer deux fois lorsque les écrans de chocs sont pourvus de deux moyens de réglage, et ce pour tous les écrans de chocs disposés le long du rotor. Les coûts liés à ces opérations de réglage ne sont pas négligeables.To obtain a precise adjustment of the positioning of the shock screens by means of manual adjustment means, it is necessary to devote time to it. This disadvantage is accentuated by the fact that the adjustment operations must be performed twice when the shock screens are provided with two adjustment means, and this for all shock screens arranged along the rotor. The costs associated with these adjustment operations are not negligible.

Le but de la présente invention vise à palier les inconvénients présentés ci-dessus, en facilitant les opérations de réglage de la machine.The object of the present invention is to overcome the disadvantages presented above, by facilitating the adjustment operations of the machine.

Selon l'invention, les moyens de réglage comprennent d'une part sur chaque côté latéral du bâti, un vérin hydraulique comportant une tige de vérin et un cylindre reliés respectivement à la structure de support et à une console mobile, coulissante par rapport à une partie fixe du bâti, et d'autre part des moyens de commande électriques ou électroniques pilotant le déplacement de la tige de vérin, définissant ainsi différentes longueurs de vérin, lesquelles correspondent chacune à un écartement déterminé entre les écrans de choc et les battoirs.According to the invention, the adjustment means comprise, on the one hand on each lateral side of the frame, a hydraulic cylinder comprising a cylinder rod and a cylinder connected respectively to the support structure and to a sliding mobile console. relative to a fixed part of the frame, and secondly electrical or electronic control means controlling the displacement of the cylinder rod, thus defining different lengths of cylinder, which each correspond to a determined spacing between the shock shields and the beaters.

Il en résulte un gain de temps dans la mise en oeuvre des opérations de réglage, et une possibilité de mémoriser des positions de réglage antérieures, notamment grâce à des moyens électroniques.This results in a saving of time in the implementation of the adjustment operations, and a possibility of storing previous adjustment positions, including through electronic means.

Selon un exemple de réalisation, la console mobile repose, en fonctionnement normal de la machine et lors du réglage de l'écartement entre les écrans de chocs et les battoirs, sur une butée fixe du bâti.According to an exemplary embodiment, the mobile console rests, in normal operation of the machine and when adjusting the distance between the impact screens and the beaters, on a fixed stop of the frame.

Selon un exemple de réalisation, la structure de support, mobile par rapport au bâti, est une traverse s'étendant à l'extérieur du bâti et dépassant avec ses extrémités sur les côtés latéraux du bâti, pour le montage des moyens de réglage et des moyens de sécurité sur lesdites extrémités.According to an exemplary embodiment, the support structure, movable relative to the frame, is a cross member extending outside the frame and protruding with its ends on the lateral sides of the frame, for mounting the adjustment means and security means on said ends.

Selon un exemple de réalisation, les écrans de chocs sont reliés à la traverse par l'intermédiaire de tiges de liaison traversant une paroi du bâti.According to an exemplary embodiment, the impact screens are connected to the cross member via connecting rods passing through a wall of the frame.

Un autre but de la présente invention vise à réaliser une machine comportant des moyens de sécurité extrêmement simples, peu coûteux et pouvant coopérer avec les moyens de réglage.Another object of the present invention is to provide a machine with extremely simple security means, inexpensive and able to cooperate with the adjustment means.

Ainsi, selon l'invention, les moyens de sécurité comprennent sur chaque côté latéral :

  • la console mobile reliée à la structure de support par l'intermédiaire du vérin hydraulique ;
  • une tige complémentaire dont une extrémité est solidaire de la structure de support et dont une autre extrémité comporte une butée mobile se déplaçant avec la tige et la traverse ;
  • une butée fixe solidaire du bâti et traversée par la tige complémentaire; et
  • un ressort de rappel s'étendant entre les butées mobile et fixe en regard l'une de l'autre et prenant appui avec ses extrémités sur lesdites butées fixe et mobile.
Thus, according to the invention, the security means comprise on each lateral side:
  • the mobile console connected to the support structure via the hydraulic cylinder;
  • a complementary rod whose one end is secured to the support structure and another end has a movable stop moving with the rod and the cross;
  • a fixed stop secured to the frame and traversed by the complementary rod; and
  • a return spring extending between the movable stops and fixed facing one another and bearing with its ends on said fixed and movable stops.

La machine conforme à l'invention présente ainsi l'avantage que le réglage initial des écrans de chocs n'est pas altéré lors du passage d'un élément imbroyable. Les moyens de sécurité coopèrent avec le vérin hydraulique dont la longueur ne change pas en dehors d'opérations de réglage. Le vérin hydraulique constitue ainsi une simple tige de liaison lors du passage d'un élément imbroyable dans la machine, aucune fonction d'amortissement ou de rappel n'étant attribuée audit vérin hydraulique.The machine according to the invention thus has the advantage that the initial setting of the shock screens is not altered during the passage of an uncrushable element. The safety means cooperate with the hydraulic cylinder whose length does not change outside adjustment operations. The hydraulic cylinder thus constitutes a simple connecting rod during passage of a non-breakable element in the machine, no damping or booster function being assigned to said hydraulic cylinder.

Selon un exemple de réalisation, la tige complémentaire comporte au moins une partie filetée sur laquelle est montée la butée mobile dont le positionnement par vissage permet de précontraindre le ressort de rappel.According to an exemplary embodiment, the complementary rod comprises at least one threaded portion on which is mounted the movable stop whose positioning by screwing allows to preload the return spring.

Les moyens de réglage et les moyens de sécurité sont par exemple juxtaposés. L'accès simultané aux moyens de réglage et aux moyens de sécurité, sur chaque côté latéral de la machine, facilite les opérations de contrôle et de maintenance.The adjustment means and the security means are for example juxtaposed. Simultaneous access to the adjustment means and the safety means on each lateral side of the machine facilitates inspection and maintenance operations.

D'autres caractéristiques et avantages ressortiront de la description non limitative donnée ci-après, en référence aux dessins annexés à titre d'exemples dans lesquels :

  • la figure 1 est une vue latérale en coupe partielle d'un exemple de machine conforme à l'invention, comportant des moyens de réglage automatisés de l'écartement entre des écrans de chocs et un rotor pourvu de battoirs ;
  • la figure 2 représente un exemple de réalisation de moyens de réglage automatisés des écrans de chocs, associés à des moyens de sécurité dans une machine conforme à l'invention ;
  • la figure 3 est une coupe partielle selon la direction C de la figure 2 ;
  • la figure 4 est une vue selon la direction A de la figure 2 ; et
  • la figure 5 est une coupe selon la direction B de la figure 2.
Other features and advantages will become apparent from the nonlimiting description given below, with reference to the accompanying drawings by way of examples in which:
  • the figure 1 is a partial sectional side view of an exemplary machine according to the invention, comprising means for automatically adjusting the spacing between impact screens and a rotor provided with beaters;
  • the figure 2 represents an exemplary embodiment of automated control means shock screens, associated with security means in a machine according to the invention;
  • the figure 3 is a partial section along the direction C of the figure 2 ;
  • the figure 4 is a view along the direction A of the figure 2 ; and
  • the figure 5 is a section along the B direction of the figure 2 .

Une machine conforme à l'invention est par exemple représentée à la figure 1. Cette machine comporte un bâti comprenant une base fixe (1) supportant une partie centrale fixe (2), et une partie arrière (3) basculante. La partie arrière (3) basculante est articulée sur la partie centrale fixe (2) au moyen d'un axe d'articulation (5). Il est possible avec l'ouverture du bâti d'intervenir à l'intérieur de la machine pour des opérations de maintenance. Une fenêtre d'accès (2a), destinée par exemple à contrôler des opérations de réglage est également prévue sur le bâti.A machine according to the invention is for example represented in the figure 1 . This machine comprises a frame comprising a fixed base (1) supporting a fixed central portion (2), and a tilting rear portion (3). The tilting rear part (3) is articulated on the fixed central part (2) by means of a hinge pin (5). It is possible with the opening of the frame to intervene inside the machine for maintenance operations. An access window (2a), for example to control adjustment operations is also provided on the frame.

Un rotor (6) entraîné par un moteur (non représenté) est monté rotatif dans la machine et en particulier vers le bas dans la partie centrale fixe (2). Le rotor (6) est par exemple constitué d'un tube central (7) solidarisé par tout moyen connu avec un arbre de rotation (8). Le rotor (6) comporte également des disques mécano-soudés (non représentés) sur le tube central (7), permettant de supporter des battoirs.A rotor (6) driven by a motor (not shown) is rotatably mounted in the machine and in particular downwards in the fixed central portion (2). The rotor (6) consists for example of a central tube (7) secured by any known means with a rotation shaft (8). The rotor (6) also includes mechanically welded discs (not shown) on the central tube (7), to support the beaters.

Lorsque les battoirs sont montés sur le rotor (6), l'extrémité de ces derniers décrit une trajectoire circulaire (6a) schématisée à la figure 1.When the beaters are mounted on the rotor (6), the end of the latter describes a circular path (6a) schematized at the figure 1 .

La machine représentée à la figure 1 comporte également des écrans de chocs (9) sur lesquels sont montées des plaques de chocs (10). L'usure plus ou moins marquée des plaques de chocs (10) en fonction de leur positionnement par rapport au rotor (6) impose des formes et des dimensions particulières pour lesdites plaques de chocs (10).The machine represented in figure 1 also comprises shock screens (9) on which shock plates (10) are mounted. Wear more or less marked shock plates (10) depending on their positioning relative to the rotor (6) imposes particular shapes and dimensions for said impact plates (10).

Des moyens de réglage (11), permettant d'augmenter et de diminuer l'écart entre les écrans de chocs (9) et la trajectoire (6a) des battoirs, sont également prévus. L'écart obtenu par l'intermédiaire des moyens de réglage (11) est fonction de la matière minérale traitée et de la granulométrie recherchée pour la matière finale.Adjusting means (11) for increasing and decreasing the distance between the impact screens (9) and the trajectory (6a) of the beaters are also provided. The difference obtained through the adjustment means (11) is a function of the treated mineral material and the particle size desired for the final material.

La partie centrale fixe (2) est également pourvue d'une ouverture d'alimentation (12) localisée sensiblement au-dessus d'une zone d'extension du rotor (6).The fixed central portion (2) is also provided with a feed opening (12) located substantially above an extension zone of the rotor (6).

La machine conforme à l'invention est représentée en configuration fermée à la figure 1. La partie arrière (3) peut être basculée dans sa position d'ouverture en pivotant autour de l'axe (5). Cette opération de basculement est assistée par au moins un vérin hydraulique (non représenté) articulé sur la base fixe (1) ainsi que sur un point d'ancrage de la partie arrière (3).The machine according to the invention is represented in closed configuration at the figure 1 . The rear part (3) can be tilted in its open position by pivoting about the axis (5). This tilting operation is assisted by at least one hydraulic cylinder (not shown) articulated on the fixed base (1) and on an anchor point of the rear portion (3).

La figure 2 représente en coupe partielle les moyens de réglage (11), actionnés grâce à un vérin hydraulique (13). Les moyens de réglage (11) s'étendent sur chaque côté latéral de la partie arrière (3) du bâti et sont reliés à la structure de support. Cette dernière est constituée d'une traverse (14) extérieure à la partie arrière (3), permettant de modifier par son déplacement, la position des écrans de chocs (9) par rapport au rotor (6). Une tige de liaison (15) est fixée par une première extrémité (15a) sur la traverse (14) et articulée sur l'écran de chocs (9) par une seconde extrémité (15b).The figure 2 represents in partial section the adjustment means (11) actuated by means of a hydraulic cylinder (13). The adjusting means (11) extend on each lateral side of the rear part (3) of the frame and are connected to the support structure. The latter consists of a cross member (14) external to the rear portion (3), to change by its displacement, the position of the shock screens (9) relative to the rotor (6). A connecting rod (15) is fixed by a first end (15a) on the cross member (14) and articulated on the shock screen (9) by a second end (15b).

La traverse (14) présente par exemple une section transversale en forme de U, dont le fond (14a) comporte une ouverture (14b) traversée par une tige complémentaire (16). Cette dernière est également fixée sur ladite traverse (14).The crossbar (14) has for example a U-shaped cross section, the bottom (14a) has an opening (14b) through which a complementary rod (16). The latter is also fixed on said cross member (14).

Lors d'une opération de réglage de la position d'un écran de chocs (9), on procède à une extension ou à une contraction du vérin hydraulique (13), engendrant une translation de la tige complémentaire (16) par rapport à une butée fixe (17) du bâti et par conséquent un déplacement de la traverse (14) par rapport au bâti.During an operation of adjusting the position of a shock screen (9), the hydraulic jack (13) is extended or contracted, causing the complementary rod (16) to be translated relative to a fixed stop (17) of the frame and therefore a displacement of the cross member (14) relative to the frame.

Lorsqu'un fragment imbroyable traverse la machine, l'écran de chocs (9) s'écarte du rotor (6) en exerçant une forte poussée sur la traverse (14). Cette dernière entraîne avec elle la tige complémentaire (16) et une butée mobile (18) vissée sur l'extrémité libre de la tige complémentaire (16). Il résulte de ce déplacement une compression d'un ressort de rappel (19) prenant appui avec ses extrémités respectivement sur les butées fixe (17) et mobile (18).When an uncrossable fragment passes through the machine, the shock screen (9) deviates from the rotor (6) exerting a strong thrust on the cross member (14). The latter carries with it the complementary rod (16) and a movable stop (18) screwed on the free end of the complementary rod (16). It results from this displacement a compression of a return spring (19) bearing with its ends respectively on the fixed stops (17) and movable (18).

Le vérin hydraulique (13) est constitué d'une tige de vérin (13a) ainsi que d'un cylindre (13b) comme cela est représenté par exemple aux figures 2 et 4. La tige de vérin (13a) est articulée sur la traverse (14) et le cylindre (13b) de vérin est articulé sur une console mobile (20). Cette console mobile (20) prend appui sur un arrêt (21) solidaire du bâti et plus particulièrement de la partie arrière (3). Cette console mobile (20) prend par exemple appui sur un tampon (22) disposé entre l'arrêt (21) et ladite console mobile (20).The hydraulic cylinder (13) consists of a cylinder rod (13a) and a cylinder (13b) as shown for example in figures 2 and 4 . The stem of cylinder (13a) is articulated on the crossmember (14) and the cylinder (13b) cylinder is articulated on a mobile bracket (20). This mobile bracket (20) is supported on a stop (21) integral with the frame and more particularly the rear portion (3). This mobile bracket (20) for example supports a buffer (22) disposed between the stop (21) and said movable bracket (20).

En fonctionnement normal de la machine ou lors d'une opération de réglage des écrans de chocs (9), la console mobile (20) repose sur le tampon (22).In normal operation of the machine or during an adjustment operation shock screens (9), the mobile bracket (20) rests on the buffer (22).

Des rainures de guidage (23) sont également prévues sur la partie fixe (3), dans lesquelles est engagée une paroi (20a) de la console mobile (20). Cette dernière peut ainsi coulisser dans les rainures (23) lorsque la traverse (14) est soulevée et lorsque le vérin hydraulique (13) se trouve dans un état figé, c'est-à-dire en dehors d'opérations de réglage.Guide grooves (23) are also provided on the fixed part (3), in which is engaged a wall (20a) of the mobile bracket (20). The latter can slide in the grooves (23) when the crossbar (14) is raised and when the hydraulic cylinder (13) is in a frozen state, that is to say outside adjustment operations.

Lorsqu'un élément imbroyable pénètre dans la machine, les écrans de chocs (9) sont écartés du rotor (6) entraînant une compression du ressort de rappel (19) entre les butées fixe (17) et mobile (18). Cette compression du ressort de rappel (19) ainsi que le coulissement vers le haut de la console mobile (20) résultent du déplacement vers le haut de la traverse (14). Ce mouvement vers le haut de la traverse (14) résulte d'un écartement non habituel des écrans de chocs (9) du rotor (6) et lequel est transmis à ladite traverse (14) par l'intermédiaire des tiges de liaison (15).When an uncrushable element enters the machine, the impact screens (9) are spaced from the rotor (6) causing a compression of the return spring (19) between the fixed stops (17) and movable (18). This compression of the return spring (19) and the upward sliding of the mobile bracket (20) result from the upward movement of the cross member (14). This upward movement of the crossmember (14) results from an unusual spacing of the impact screens (9) of the rotor (6) and which is transmitted to said crossmember (14) via the connecting rods (15). ).

Les tiges complémentaires (16) solidaires de la traverse (14), entraînent la butée mobile (18) et compriment le ressort de rappel (19), lequel permettra par l'intermédiaire de sa force de rappel, de ramener les écrans de chocs (9) dans leur position de réglage initial. Lors d'un tel déplacement de la traverse (14), la console mobile (20) est entraînée par coulissement vers le haut dans la mesure où le vérin hydraulique (13) est dans un état figé et sa longueur n'est pas modifiée.The complementary rods (16) secured to the crossmember (14) drive the movable stop (18) and compress the return spring (19), which will allow, through its restoring force, to bring back the impact shields ( 9) in their initial setting position. During such a displacement of the crossbar (14), the movable bracket (20) is driven upwardly to the extent that the hydraulic cylinder (13) is in a frozen state and its length is not changed.

A titre d'exemple, le vérin hydraulique (13) est associé à une alimentation hydraulique comportant un double clapet à billes (13c). Ce dernier actionne les vérins hydrauliques (13) lorsque l'utilisateur agit sur les vannes pilotant lesdits vérins hydrauliques (13). En l'absence de pression hydraulique d'alimentation des vérins (13), le double clapet à billes (13c) demeure fermé, empêchant tout transfert de fluide hydraulique entre les chambres de chaque vérin (13). Ce dernier joue alors le rôle d'une simple tige de liaison rigide.For example, the hydraulic cylinder (13) is associated with a hydraulic supply comprising a double ball valve (13c). The latter actuates the hydraulic cylinders (13) when the user acts on the valves controlling said hydraulic cylinders (13). In the absence of hydraulic supply pressure of the cylinders (13), the double ball valve (13c) remains closed, preventing any transfer of hydraulic fluid between the chambers of each cylinder (13). The latter then plays the role of a simple rigid connecting rod.

Le vérin hydraulique (13) est également dimensionné de façon à conférer à la tige de vérin (13a) une course optimale. Cette dernière permet d'obtenir une longueur du vérin hydraulique (13) dans un état contracté maximal, par laquelle les plaques de chocs (10) montées sur les écrans de chocs (9) viennent en contact avec les battoirs montés sur le rotor (6). Il convient donc dans un réglage initial de la machine, de respecter ou de ne pas aller au-delà d'une contraction donnée du vérin hydraulique (13), afin d'éviter que les plaques de chocs (10) ne s'étendent sur les trajectoires des battoirs. Ceci permet au fur et à mesure de l'usure des battoirs et des plaques de chocs (10) de réajuster le positionnement relatif entre lesdites plaques de chocs (10) et les battoirs , pour compenser ladite usure.The hydraulic cylinder (13) is also dimensioned so as to give the cylinder rod (13a) an optimum stroke. The latter makes it possible to obtain a length of the hydraulic cylinder (13) in a maximum contracted state, by which the impact plates (10) mounted on the impact screens (9) come into contact with the beaters mounted on the rotor (6). It is therefore appropriate in an initial setting of the machine, to respect or not to go beyond a given contraction of the hydraulic cylinder (13), to prevent the shock plates (10) from extending over the trajectories of the beaters. This allows, as and when wear of the beaters and shock plates (10) to readjust the relative positioning between said shock plates (10) and the beaters, to compensate for said wear.

Claims (7)

  1. Percussive machine for crushing or grinding fragments of mineral matter in order to obtain a final matter having a particular particle size, comprising:
    - a frame comprising a stationary base (1) supporting a stationary central portion (2), a tilting rear portion (3), and a tilting front portion hinged on the central portion (2),
    - shielding plates covering the inner surfaces of the walls of the frame,
    - a rotor (6) with a horizontal axis, housed in the frame and supporting beaters,
    - a motor rotating the rotor (6),
    - shock shields (9) on which shock plates (10) are fastened, the beaters projecting fragments of the mineral matter on said shock plates (10), said shock shields (9) being mounted on a support structure movable relative to the frame;
    - adjustment means (11) for increasing and decreasing the gap between the shock screens (9) and the beaters as a function of the mineral matter, the desired particle size, or the wear of said shields (9) and the beaters,
    - an opening (12) for supplying mineral matter in the stationary central portion (2), located substantially above an extension zone of the rotor (6),
    - a discharge opening formed stationary base (1) to discharge the final matter by gravity,
    - safety means spacing the shock shields (9) further away from the trajectory of the beaters (6a) so as to produce a passage for unshreddable fragments and returning the shock shields (9) to their initial adjustment position after the passage of the unshreddable fragments,
    characterized in that the adjustment means (11) on the one hand comprise, on each lateral side of the frame, a hydraulic jack (13) comprising a cylinder rod (13a) and a cylinder (13b) respectively connected to the support structure (14) and a work column (20), which slides relative to a stationary portion of the frame, and on the other hand, electrical or electronic control means steering the movement of the cylinder rod (30), thereby defining different cylinder lengths, which each correspond to a predetermined spacing between the shock shields (9) and the beaters.
  2. The machine according claim 1, characterized in that the work column (20) rests, during normal operation of the machine and during the adjustment of the spacing between the shock shields (9) and the beaters, on a stationary stop of the frame.
  3. The machine according to claim 1 or 2, characterized in that the support structure, which is movable relative to the frame, is a crosspiece (14) extending to the outside of the frame and protruding, with its ends, on the lateral sides of the frame, for the assembly of the adjustment means (11) and the safety means on said ends.
  4. The machine according to claim 3, characterized in that the shock shields (9) are connected to the crosspiece (14) by means of connecting rods (15) passing through a wall of the frame.
  5. The machine according to any one of claims 1 to 4, characterized in that the safety means include, on each lateral side:
    - the work column (20) connected to the support structure (14) by means of the hydraulic jack;
    - a complementary rod (16) whereof one end is secured to the support structure and another end of which comprises a movable stop (18) moving with the rod (16) and the support structure (14);
    - a stationary stop (17) secured to the frame and passed through by the complementary rod (16); and
    - a return spring (19) extending between the mobile (18) and stationary (17) stops opposite one another and bearing, with its ends, on said movable (18) and stationary (17) stops.
  6. The machine according to claim 5, characterized in that the complementary rod (16) comprises at least one threaded portion on which the movable stop (18) is mounted, whereof the positioning by screwing makes it possible to pre-stress the return spring (19).
  7. The machine according to any one of claims 1 to 6, characterized in that the adjustment means (11) and the safety means are juxtaposed.
EP20080360002 2007-02-28 2008-02-28 Beater mill for crushing and/or grinding mineral matter comprising automated adjustment means Not-in-force EP1964612B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0701476A FR2912934B1 (en) 2007-02-28 2007-02-28 PERCUSSION MACHINE FOR CRUSHING AND / OR GRINDING MINERAL MATERIALS COMPRISING AUTOMATED ADJUSTING MEANS

Publications (2)

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EP1964612A1 EP1964612A1 (en) 2008-09-03
EP1964612B1 true EP1964612B1 (en) 2012-06-06

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Application Number Title Priority Date Filing Date
EP20080360002 Not-in-force EP1964612B1 (en) 2007-02-28 2008-02-28 Beater mill for crushing and/or grinding mineral matter comprising automated adjustment means

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EP (1) EP1964612B1 (en)
FR (1) FR2912934B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE534783C2 (en) 2010-04-16 2011-12-20 Sandvik Intellectual Property Impact crusher with horizontal axis
SE534694C2 (en) * 2010-04-16 2011-11-22 Sandvik Intellectual Property Impact crusher with horizontal axis
CN104826699B (en) * 2015-05-08 2017-12-15 中联重科股份有限公司 Disintegrating machine and its adjusting apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3911086C2 (en) * 1988-10-10 1994-10-20 Gronholz Claus Impact crusher
DE19511097C1 (en) * 1995-03-25 1996-07-11 Krupp Foerdertechnik Gmbh Comminution machine, esp. striker and breaker
JP4022406B2 (en) * 2001-08-27 2007-12-19 株式会社小松製作所 Method for controlling impact crusher gap adjusting device and gap adjusting device therefor
ITVE20040043A1 (en) * 2004-11-05 2005-02-05 Franzoi Metalmeccanica S R L DEVICE FOR ADJUSTING THE HORSES IN MILLS FOR INERT MATERIALS AND / OR RECYCLING.

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FR2912934A1 (en) 2008-08-29
EP1964612A1 (en) 2008-09-03
FR2912934B1 (en) 2009-04-24

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