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EP4291336A1 - Installation pour le déchiquetage de déchets métalliques, axe utilisable dans une telle installation, et disque utilisable dans un tel axe - Google Patents

Installation pour le déchiquetage de déchets métalliques, axe utilisable dans une telle installation, et disque utilisable dans un tel axe

Info

Publication number
EP4291336A1
EP4291336A1 EP22706906.9A EP22706906A EP4291336A1 EP 4291336 A1 EP4291336 A1 EP 4291336A1 EP 22706906 A EP22706906 A EP 22706906A EP 4291336 A1 EP4291336 A1 EP 4291336A1
Authority
EP
European Patent Office
Prior art keywords
lateral
disc
elements
disc according
central
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.)
Pending
Application number
EP22706906.9A
Other languages
German (de)
English (en)
Inventor
Cristian FRACASSI
Eric GHIDINELLI
Alessandro ROMAIOLI
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.)
Zato SpA
Original Assignee
Zato Srl
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 Zato Srl filed Critical Zato Srl
Publication of EP4291336A1 publication Critical patent/EP4291336A1/fr
Pending legal-status Critical Current

Links

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
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/142—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with two or more inter-engaging rotatable cutter assemblies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/146—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with a rotor comprising a plurality of axially contiguous disc-like segments each having at least one radially extending cutting element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B02C18/182—Disc-shaped knives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B02C18/182—Disc-shaped knives
    • B02C18/184—Disc-shaped knives with peripherally arranged demountable cutting tips or elements

Definitions

  • the present invention generally relates to the field of plant engineering and it particularly relates to a metal waste shredding plant, as well as an axis and a disc which can be used in such plant.
  • Conventional waste shredding plants generally comprise shredding means such as a plurality of counter-rotating axes designed to shred waste.
  • each axis A comprises a plurality of discs D equally spaced and staggered with respect to the adjacent axis A so that upon rotating the axes, the lateral faces F of the discs D face each other and they are substantially at contact with each other.
  • each disc D comprises a central portion integrally joined with a rotary shaft and a plurality of peripheral cutting modules M which can be removably coupled with the central portion by means of a high number of through screws.
  • the material is deposited on the plane defined by the axes A and it is cut by the lateral faces F of the cutting modules M with an action similar to that of a pair of scissors.
  • replacing a disc D requires stopping the plant, removing the axis A, removing all the discs D until one reaches the worn or damaged disc, replacing it with a new disc and refitting all the discs D on the axis A.
  • disassembling one or more modules M requires stopping the plant and operating directly therein.
  • the operator must act on the plurality of screws, generally 9-12 screws, of each module M to remove and replace it. This operation is particularly difficult both because of the working conditions in the middle of sharp waste residues, as well as due to the size and weight of each individual module M.
  • the modules M have a particularly high cost due to the materials used and require appropriate expensive disposal processes.
  • the operations of replacing the discs D or the modules M are particularly slow and require a machine downtime amounting to several days, generally one week.
  • a further drawback is therefore that the plant operates with a reduced shredding efficacy for different time, even for months.
  • a further drawback of the plant described in this document lies in the fact that it is not particularly effective, in particular in relation to the fact that the waste remains blocked on the discs and wrap around them.
  • An object of the present invention is to at least partly overcome the drawbacks illustrated above by providing a metal waste shredding plant that is highly efficient and cost- effective.
  • An object of the present invention to provide a metal waste shredding plant with minimum maintenance costs and times.
  • An object of the present invention is to at least partly overcome the drawbacks illustrated above by providing a disc that is highly efficient and cost-effective.
  • Another object of the present invention to provide a disc easy to maintain.
  • Another object of the present invention to provide a disc that avoids the blocking of the material around it.
  • FIG. 1A is an axonometric view of a pair of counter-rotating axes A with a plurality of discs D of the state of the art with FIG. IB showing an enlargement of FIG. 1A which schematically shows a detail of the disc D;
  • FIG. 2 is an axonometric view of a disc 100
  • FIGS. 3 and 4 are a partially exploded axonometric view of the disc 100
  • FIG. 5 is an axonometric view of a plant 1 with a plurality of axes 10.
  • a plant 1 for shredding waste and, in particular, for shredding metal waste.
  • the plant 1 may comprise:
  • - drive means 6 for example a diesel or electric engine, operatively connected to the shredding means 5.
  • the shredding means 5 may comprise at least one axis 10 operatively connected with the drive means 6 so that the latter activate the former.
  • the shredding means 5 may comprise a plurality of axes 10.
  • the axes 10 may be configured in a manner such that two adjacent axes 10 are counter-rotating with respect to each other.
  • Each axis 10 may comprise a shaft 101 and a plurality of discs 100 keyed onto the shaft 101.
  • the discs 100 may therefore be coupled to the shaft 101 so as to rotate with the latter around a rotation axis X.
  • the shaft 101 may define such rotation axis X.
  • the shaft 101 may be shaped, while the disc 100 may comprise a central portion 110 with a counter-shaped inner surface 111.
  • the shaft 101 may have a hexagonal cross-section and the inner surface 111 may also be hexagonal, as schematically illustrated in FIG. 2.
  • the discs 100 of an axis 10 may have a distance along the shaft 101 substantially equal to the width of the disc 100. Furthermore, the distance between two adjacent shafts 101 may be substantially smaller than the diameter of the discs 100, while the discs 100 of two adjacent shafts 101 may be mutually staggered so that during use, that is during rotation of the axes 10, the discs 100 have respective lateral faces 120 facing each other or at contact.
  • the counter-rotation of two adjacent shafts 101 may promote the cutting and therefore the shredding of the metal waste.
  • This cutting action may be mainly carried out by the lateral faces 120, and in particular by the outer edges 121 thereof.
  • the lateral faces 120 of the disc may define a plane p substantially perpendicular to the axis X.
  • the disc 100 may comprise an outer surface 130 substantially perpendicular to said plane p. Such surface 130 may be designed to come into contact with the waste.
  • the outer surface 130 and the lateral faces 120 may define the edges 121 which may be sharp-edged.
  • an edge of about 90° may be provided for interposed between the outer surface 130 and the lateral faces 120 defining the edge 121.
  • the disc 100 may comprise a plurality of cutting modules 150 which may be coupled with the central portion 110 peripherally thereto.
  • the central portion 110 may have a hexagonal inner surface 111 and a pentagonal outer surface 112. It is clear that such surfaces have a polygonal shape considering a section in the plane p.
  • each cutting module 150 may comprise a lower surface 151 which may remain facing or at contact with one of the sections 112'. In other words, should the outer surface 112 be pentagonal, five cutting modules 150 may be provided for.
  • the cutting modules 150 may be coupled to the central portion 110 in a per se known manner, for example by means of screw-and-nut means 190.
  • a plurality of screws may be provided for, while both the central portion 110 and the cutting module 150 may comprise a plurality of radial holes 116.
  • each of the latter may have respective lateral faces 153, 113 which may cooperate to define the lateral faces 120 of the disc.
  • the lateral faces 153, 113 may be substantially flush so that the lateral surface 120 of the disc 100 is substantially planar and continuous.
  • This characteristic may allow to prevent the waste from being blocked between the discs and wrapping around them.
  • the outer surface 130 of the disc 100 may be in proximity of the opposite shaft 101.
  • the surfaces 120 of discs of two adjacent axes 10 may remain in proximity, almost at contact, so as to prevent the waste from being interposed between two discs 100, jeopardising the shredding efficacy and/or jeopardising the durability of the discs 100.
  • the lateral face 153 of the cutting module 150 may therefore comprise the cutting edge 121.
  • the cutting modules 150 may interact with the metal waste S so as to shred the latter.
  • each module may comprise a central element 155 and a pair of lateral elements 157 which may be coupled with the central element 155 on opposite sides thereof, preferably which can be coupled removably.
  • the central element 155 may comprise a pair of opposite lateral faces 155', 155"
  • the lateral element 157 may comprise a respective pair of opposite lateral faces 157', 157".
  • the lateral elements 157 may therefore be coupled on opposite sides with respect to the central element 155, so that the face 157' of the former is arranged thereat or at contact with the face 155' of the central element 155 and so that the face 157" of the latter is arranged thereat or at contact with the face 155" of the central element 155.
  • the face 157" of the former and the face 157' of the latter may define the respective lateral faces 153 of the cutting module 150.
  • the outer lateral faces 157', 157" of the lateral elements 157 may be flush with the outer surface 113 of the central portion 110 so as to define the flat surface 120 with the advantages described above.
  • the lateral face 120 of the disc 100 may comprise the outer face 157" or 157' of the lateral element 157 depending on how the latter is positioned.
  • a lateral face 120 may comprise the lateral face 157" while the opposite face 120 may comprise the lateral face 157'.
  • the lateral elements 157 may have a thickness s7 substantially smaller than the thickness s5 of the central elements 155. It is clear that the total thickness of the disc 100 may be equal to the sum of the thickness s7 of two lateral elements 157 and to the thickness s5 of the central element 155.
  • the lateral elements 157 and the elements 155 may be coupled by means of a screw- and-nut means 191 of the per se known type.
  • the lateral elements 157 may comprise a plurality of through holes 158 while the central elements 155 may comprise a plurality of holes 156.
  • the holes 158 and 156 may therefore be mutually configured so that upon coupling the lateral elements 157 and the central elements 155, the respective holes 156, 158 are arranged thereat.
  • the holes 158 may be through holes. In this manner, a plurality of screws 191 may be provided passing through the holes 158 and interacting with the holes 156 and may therefore be internally threaded.
  • the holes 156 may be blind.
  • each face 155', 155" may comprise a plurality of blind holes 156 for coupling a respective lateral element 157.
  • the holes 156 may be of the passing through type so as to simplify the operations for manufacturing the central element 155.
  • both the holes 156 and the holes 158 may have respective axes substantially parallel to the axis X.
  • each central module 155 and each lateral portion 157 may comprise a respective upper surface 131, 132.
  • the surfaces 131 and 132 may cooperate to define the outer surface 152 of the module 150, that is, the surface designed to interact with the waste.
  • outer surfaces 152 of two or more modules 150 may cooperate to define the outer surface 130 of the disc 100.
  • the central modules 155 and the lateral portions 157 may comprise respective lower surfaces 134, 135 opposite the upper surfaces 131, 132 which may remain facing the central portion 110 of the disc 100 to define the inner surface 151 of the module 150.
  • the surface 131 of the central module 155 may be without seats for the screws.
  • the outer surface 131 may be substantially continuous.
  • This characteristic may allow to prevent the waste from being blocked on the surface, causing malfunctions of the system, for example wrapping around the disc 100.
  • the surface 132 of the lateral elements 157 may be without seats for the screws.
  • the outer surface 131 may be substantially continuous.
  • the entire outer surface 152 may be without seats for the screws and therefore continuous.
  • the entire outer surface 130 may be substantially continuous.
  • outer surface 131 or the surface 152 may be flat although it may have any dents or cuts due to the shredded waste.
  • the expression continuous surface is used to indicate that this surface is without seats for the screws 190 and therefore that the fastening screws 190 are not accessible from the external.
  • the holes 116 of the central portion 110 may be through holes, while the holes of the cutting module 150 may be blind.
  • the holes 116 of the central portion 110 and of the cutting module 150 may be mutually configured so that upon positioning the cutting modules 150 on the surface 112', the respective holes are arranged thereat.
  • the head of the screws 190 may remain inside the central portion 110, that is at the surface 111, and it may therefore remain protected from dirt and waste. This will allow to prevent the materials from sealing the head of the screw 190 due to the high pressures, preventing or making it difficult to unscrew it in the event of maintenance and/or replacement of a module 150.
  • the surfaces 131 and 132 may be flush irrespective of whether the surface 131 is without the screw seats. Due to these characteristics, the outer surface 152 may be substantially flat. In other words, the outer surface 152 may be without steps or grooves considering a plane substantially perpendicular to the plane p passing through the axis X, that is, an axial plane of the disc 100. Suitably, the entire outer surface 130 may be substantially flat.
  • outer surface 130 may have a substantially planar extension although, due to wear, the surface 130 may have cuts or dents.
  • the surface 152 along a radial plane parallel to p may have a non-circular profile and it may have a shape which may for example comprise a cusp, or other interruptions such as steps, although not shown in the attached figures.
  • the outer surface 130 when the surfaces 131, 132 are flush, the outer surface 130 may be flat, while when the screws 190 are positioned inside, the outer surface 130 may be substantially continuous, that is, without the holes for the screws so that - in use - the heads of the screws 190 are inside as described above.
  • the surface 130 may be continuous and flat with all the advantages described above.
  • the central elements 155 and the lateral elements 157 may have the same height and width and they may have a different thickness.
  • the central elements 155 and the lateral elements 157 may have the same shape considering a section in the plane p or a plane parallel thereto.
  • the cutting modules 150 may all be identical to each other.
  • the outer lateral surface 157" and 157' of the former may be substantially flush with the lateral faces 113 so as to cooperate with the latter to define the lateral faces 120 of the disc 100.
  • the lateral elements 157 may comprise the cutting edge 121.
  • the lateral elements 157 may define the part of the disc 100 which is subject to greater wear.
  • the characteristics described above allow to remove a single lateral element 157 of a single cutting module 150 in order to replace it in case of wear of the cutting edge 121.
  • the position of two cutting modules 157 may also be inverted with respect to the central element 155.
  • the face 157" of a first module and the face 157' of the opposite module, that is the outer faces, may wear out during use.
  • the screws 190 may therefore be removed, and the right and left lateral elements may be inverted. Therefore, the worn-out face 157" of the right lateral element 157 may abut against the face 155" of the central element and the face 157' not worn out may remain outside. Similarly, the left lateral element 157 may have the respective worn-out face 157' facing the face 155' and the face 157" not worn-out facing outwards.
  • the lateral elements 157 may be made of a particularly hard material.
  • special steel for tools, hardened steel, nitrided steel or other steel of the per se known type may be used for the production of disc cutting modules of shredding plants.
  • the lateral elements 157 and the central elements 155 may be made of materials different from each other.
  • the lateral elements 157 may be made of a material which is harder than the central elements 155.
  • the lateral elements 157 subjected to wear may be made of hard and expensive material, while the central elements 155 may be made of cheaper and lighter materials.
  • the lateral elements 157 may be easier to handle due to the small dimensions and weights thereof with respect to a whole disc 100.
  • the characteristics described above allow to carry out maintenance on the disc 100, for example one or more lateral elements 157 may be replaced, without having to remove the disc 100 from the shaft 101 or to completely remove the cutting module 150.
  • this operation for replacing or inverting the lateral elements 157 may be carried out simply by stopping the axis 10 and by acting on the disc 100 positioned on the shaft 101.
  • the cutting modules 150 may be coupled to the central portion 110 by means of radial screws 190 as described above, or by means of radial screws positioned so as to allow access from the outer surface 130, for example as shown in FIG. IB of the state of the art.
  • the radial screws 190 may be arranged at the central element 155 only. This will allow to easily replace or change the position of lateral elements 157, while the central element 155 may remain in position and which may be replaced much less frequently.
  • the lateral elements 157 may be displaced on different discs 100 and not only from one side of the disc 100 to the other.
  • the lateral elements 157 of the discs 100 positioned centrally on the shaft 101 may wear out more than the peripheral ones. Therefore, this may allow to change one or more lateral elements 157 with the discs 100 positioned along the shaft 101 without having to remove all the discs 100.

Landscapes

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

Abstract

L'invention concerne un disque qui peut être utilisé dans une installation de déchiquetage de déchets métalliques qui peut être couplé à un arbre rotatif (101) pour tourner avec celui-ci. Le disque comprend une partie centrale (110) conçue pour interagir avec l'arbre (101), pour tourner d'un seul tenant avec celui-ci autour d'un axe de rotation (X) et une pluralité de modules de coupe (150) accouplés à la partie centrale (110) de manière périphérique à celle-ci. Les modules de coupe (150) sont conçus pour interagir avec les déchets métalliques pendant l'utilisation. Chacun des modules de coupe (150) comprend un élément central (155) et une paire d'éléments latéraux (157) qui peuvent être accouplés amovibles à l'élément central (155) sur des côtés opposés.
EP22706906.9A 2021-02-11 2022-02-01 Installation pour le déchiquetage de déchets métalliques, axe utilisable dans une telle installation, et disque utilisable dans un tel axe Pending EP4291336A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102021000003074A IT202100003074A1 (it) 2021-02-11 2021-02-11 Impianto per la triturazione di rifiuti metallici, asse impiegabile in tale impianto, nonché disco impiegabile in tale asse
PCT/IB2022/050850 WO2022172126A1 (fr) 2021-02-11 2022-02-01 Installation pour le déchiquetage de déchets métalliques, axe utilisable dans une telle installation, et disque utilisable dans un tel axe

Publications (1)

Publication Number Publication Date
EP4291336A1 true EP4291336A1 (fr) 2023-12-20

Family

ID=75769736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22706906.9A Pending EP4291336A1 (fr) 2021-02-11 2022-02-01 Installation pour le déchiquetage de déchets métalliques, axe utilisable dans une telle installation, et disque utilisable dans un tel axe

Country Status (3)

Country Link
EP (1) EP4291336A1 (fr)
IT (1) IT202100003074A1 (fr)
WO (1) WO2022172126A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL131654U1 (pl) * 2023-09-08 2025-03-10 Instytut Techniki Górniczej Komag Nóż tnący, szczególnie dla urządzeń rozdrabniających zużyte sprzęty zawierające magnesy neodymowe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2911403B2 (ja) * 1996-04-25 1999-06-23 株式会社キンキ 二軸剪断式破砕機の回転刃
FR2809333B1 (fr) * 2000-05-25 2002-08-16 Precimeca Broyeur de dechets perfectionne, parties constitutives et procede de maintenance
FR2892952B1 (fr) * 2005-11-04 2008-03-21 Sarl Mecanique Conception Ind Machine de broyage de materiaux, comprenant un premier et un deuxieme rotors paralleles montes rotatifs sur un chassis fixe.

Also Published As

Publication number Publication date
IT202100003074A1 (it) 2022-08-11
WO2022172126A1 (fr) 2022-08-18

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Owner name: ZATO S.P.A.