WO2003028891A1 - Technique de broyage et de criblage de bois et broyeuse a cet effet - Google Patents

Technique de broyage et de criblage de bois et broyeuse a cet effet Download PDF

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Publication number
WO2003028891A1
WO2003028891A1 PCT/EP2002/010664 EP0210664W WO03028891A1 WO 2003028891 A1 WO2003028891 A1 WO 2003028891A1 EP 0210664 W EP0210664 W EP 0210664W WO 03028891 A1 WO03028891 A1 WO 03028891A1
Authority
WO
WIPO (PCT)
Prior art keywords
grinder
container
screws
grinding
grinding blades
Prior art date
Application number
PCT/EP2002/010664
Other languages
English (en)
Inventor
Giuseppe Loppoli
Original Assignee
Giuseppe Loppoli
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 Giuseppe Loppoli filed Critical Giuseppe Loppoli
Priority to EP02777181A priority Critical patent/EP1429867A1/fr
Publication of WO2003028891A1 publication Critical patent/WO2003028891A1/fr

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
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/22—Crushing mills with screw-shaped crushing means
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K5/00—Feeding devices for stock or game ; Feeding wagons; Feeding stacks
    • A01K5/001—Fodder distributors with mixer or shredder
    • A01K5/002—Fodder distributors with mixer or shredder with mixing or shredding element rotating on horizontal axis
    • 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
    • B02C18/141—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with axial flow
    • 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

Definitions

  • the present invention relates to a method of grinding and screening wooden materials and a grinder to carry out said method, particularly adapted to grind continuously logs, branches and generally wooden materials of different origin.
  • a first type of grinders of the prior art generally consists of a container into which the material to be ground is introduced and provided with means for conveying the material to a hammer rotor.
  • a first drawback of this technique consists in that a portion of the material undergoes several crushing treatments before being discharged, thus decreasing the output of the grinder.
  • Another drawback of this technique consists in that a great power is required because the rotor to be able to carry out properly its function, must have a big mass to acquire a sufficient kinetic energy to overcome the stronger resistance to crushing opposed by the material.
  • a further drawback consists of the high noise during operation, due to the high number of revolutions of the rotor and the impact of the hammers against the material.
  • Another drawback consists of the high dustiness caused in the environment where the grinder is located, due to the ventilation generated by the drum and the hammers during rotation.
  • Another grinder of the prior art generally consists of a container on whose bottom two juxtaposed screws are arranged, provided with spirals rotating in opposite directions in operation. In this way the material loaded on the screws, is ground by the two spirals in proximity of the central zone between the two screws where the two spirals are cooperating.
  • a grating arranged at the zone under the screws carries out screening of the crushed pieces before the discharge.
  • the material of bigger size that does not pass through the grating undergoes a further crushing treatment in the zone between the spirals and the underlying grating.
  • a first drawback of such technique as in the preceding case consists in that a portion of the material undergoes several crushing treatments before being discharged, thus decreasing the hourly output of the grinder.
  • Another drawback of this technique consists in using a high power to allow crushing of the material by the screw spirals.
  • a further drawback consists in that the product to be crushed is easily jammed, getting stuck between the two spirals or between the spirals and the underlying grating.
  • the present invention aims at overcoming said drawbacks.
  • a first object of the invention is to provide a method of grinding and screening wooden materials and a grinder to carry out said method, allowing to obtain higher hourly outputs relative to the grinders of the prior art with equivalent loading capacity using the known grinding and screening methods.
  • Another object of the invention is to provide a grinder requiring lower powers relative to equivalent grinders of known type.
  • a further object of the invention is to provide a grinder having a more reliable operation relative to the grinders of known type.
  • a last but not least object of the invention is to reduce the dust emissions in comparison with the machines of the prior art.
  • a method to carry out grinding and screening of wooden materials using a grinder comprising a container receiving the materials to be ground provided near its bottom with one or more screws having on the spirals peripheral cutting elements cooperating with grinding blades fixed inside said container, said method according to the contents of the first claim, being characterized in that said screening operation of said materials occurs during the grinding process when said material is passing through the gaps defined between said grinding blades and said spirals of said screws.
  • the grinder to carry out said method is of the type comprising:
  • each of said screws comprising a cylindrical element on which at least a couple of spirals are wound with opposite winding directions and converging to the center of the cylindrical element on which they are wound;
  • the grinder of the invention has a container with open bottom and a plurality of grinding blades centrally arranged in said container.
  • These grinding blades are supported by a holding structure developed longitudinally to the container and has the cross sectional shape of a triangle with the vertex turned upwards, the base turned downwards and the slanted sides supporting two rows of grinding blades.
  • These grinding blades cooperate with the cutting elements of the spirals of two parallel and juxtaposed screws near the container bottom.
  • the opening of the container bottom allows a discharge of the ground material that in this way is not put again in the cycle so that it is not ground again passing through the same grinding blades.
  • the coaxial and opposite winding directions of the spirals of the same screw cause the material to be ground to flow to the center of the container along the longitudinal direction of said container. The material which was not ground and reaches the central zone of the screw and the container, at this point undergoes a mixing up avoiding stay of the material and the consequent possible jams.
  • FIG. 3 is a front view of the grinder of fig. 1 without the end wall;
  • Fig. 4 is an isometric view of the grinder inside without the screws;
  • FIG. 7 shows the grinder of fig. 3 in operation.
  • the grinder of the invention is shown in fig. 1 where it is generally indicated with numeral 1.
  • the grinder is preferably constructed and shown in the figures as a towed cart, but it is obvious that in other embodiments the grinder could be an independent fixed unit.
  • the grinder 1 of the invention comprises a container 2 at whose bottom 2a two screws 3, 4 are arranged, each comprising a cylindrical element 5, 6 on which a couple of spirals 7, 8 and 9, 10 are wound with coaxial and opposite winding directions, converging to the center of the cylindrical element 5, 6.
  • each screw 3, 4 defines the longitudinal rotation axes 3b, 4b of said screws 3, 4 and is connected to driving means, not shown in the drawings for sake of illustrative simplicity, adapted to put them in rotation along the directions indicated by arrows 13, 14 as shown in fig. 3.
  • Said driving means could for instance consist of an electric motor or in case the grinder is self propelled, could consist of the same engine driving the grinder.
  • a plurality of grinding blades generally indicated with 12 are fixed inside the container 2 and are adapted to cooperate with the cutting elements 11 of the screws 3, 4 to carry out the starting phase of the grinding operation.
  • the container 2 at its lower part and below the screws 3, 4 there is a free space adapted to allow the ground material T to fall down by gravity.
  • the free space is obtained by making the container 2 open at the bottom.
  • the ground material T that for instance could consist of conveyor belts, screws or other discharging means of a known type.
  • the grinding blades 12 As shown more particularly in fig. 5, they have a flat profile 15 arranged longitudinally to the container 2 on which a plurality of teeth 16 having a generally triangular shape are provided. It is clear that in other embodiments such a profile may have different shapes, in any case adapted to give to said flat profile 15 a generally comb-like shape.
  • the grinding blades 12 are arranged at the center of the container 2 and are supported by a holding structure generally indicated with 17, also developed longitudinally to the container 2 and having a cross sectional general shape of a triangle with the vertex turned upwards and the base turned to the bottom 2a of the container 2.
  • each slanted side 17a, 17b four grinding blades 12 are fixed and parallel to each other with the teeth 16 turned to the corresponding screws 3, 4.
  • the number of the grinding blades is preferably four but it is clear that in different embodiments it could be a different number and as described below, it will have different effects on the grinding operation.
  • the grinding blades 12 and more particularly the triangular teeth 16, cooperate and graze the cutting elements 11 arranged on the spirals 7, 8 and 9, 10 of the screws 3, 4 as shown in fig. 6, to carry out the cutting operation of the material M when contacted thereby.
  • openings 18 are preferably provided, making easier the internal inspection of the container in case of malfunctioning or maintenance.
  • the geometry of the gaps 19 is particularly defined by the profile and number of the grinding blades 12, the pitch and the angle of the spirals 7, 8, 9, 10 of the screws 3, 4.
  • the opening at the bottom of the container causes all the ground material T to be immediately discharged thus avoiding the possibility that the material is again put in the cycle and undergoes further grinding stages. This involves an increase of the grinding performance and therefore a greater hourly output relative to the grinders of the prior art.
  • the arrangement of the spirals 7, 8 and 9, 10 with opposite directions to the center of the screws 3, 4, causes the material to be ground M to follow a path going from the lateral walls to the centre of the container 2.
  • the material M that was not ground reaches the centre of the screws 3, 4, it undergoes a whirling mixing up with the overlying material thus preventing its stay and jamming.
  • Such variations may for instance consist of a different number of screws, a different number of spirals for each screw, a different number and arrangement of the grinding blades, or even a different shape of the teeth of the grinding blades.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Birds (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Disintegrating Or Milling (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)

Abstract

On utilise, dans le cadre de cette technique de broyage et de criblage de bois (M), une broyeuse (1) constituée d'un contenant (2) dans lequel on place les matériaux (M) à broyer et près du fond (2a) duquel se trouvent une ou plusieurs vis (3, 4) dont le pourtour des spires (7, 8, 9, 10) sont pourvues d'outils de coupe (11) coopérant avec des lames broyeuses (12) fixées à l'intérieur du contenant. On fait passer, pour le broyer, ce matériau (M) par les espaces (19) délimités par les lames broyeuses et les spires (7, 8, 9, 10) des vis (3, 4). Sous ces vis (3, 4), la partie inférieure du contenant comporte un espace libre dans lequel le matériau broyé (T) tombe sous l'effet de la pesanteur.
PCT/EP2002/010664 2001-09-24 2002-09-23 Technique de broyage et de criblage de bois et broyeuse a cet effet WO2003028891A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02777181A EP1429867A1 (fr) 2001-09-24 2002-09-23 Technique de broyage et de criblage de bois et broyeuse a cet effet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI20010201 ITVI20010201A1 (it) 2001-09-24 2001-09-24 Metodo per la triturazione e la vagliatura di materiali legnosi e trituratore atto a realizzare tale metodo
ITVI2001A000201 2001-09-24

Publications (1)

Publication Number Publication Date
WO2003028891A1 true WO2003028891A1 (fr) 2003-04-10

Family

ID=11461705

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/010664 WO2003028891A1 (fr) 2001-09-24 2002-09-23 Technique de broyage et de criblage de bois et broyeuse a cet effet

Country Status (3)

Country Link
EP (1) EP1429867A1 (fr)
IT (1) ITVI20010201A1 (fr)
WO (1) WO2003028891A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI20090250A1 (it) * 2009-10-15 2011-04-16 Giuseppe Loppoli Trituratore perfezionato per biomasse organiche
EP2438991A1 (fr) * 2010-09-28 2012-04-11 UPM-Kymmene Corporation Procédé de traitement de matiere premiere de bois, et broyeur pour matiere premiere de bois
WO2017069621A1 (fr) * 2015-10-23 2017-04-27 Peeters Landbouwmachines B.V. Chariot mélangeur
CN108347900A (zh) * 2015-10-23 2018-07-31 佩特斯兰得堡机械有限公司 混合供料装置
RU193155U1 (ru) * 2019-04-15 2019-10-15 федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет" (ДГТУ) Установка для измельчения твердых материалов

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8805191U1 (de) * 1988-04-19 1988-10-27 Sax, Albert, 8300 Landshut Zerkleinerungsvorrichtung
DE3910115A1 (de) * 1988-04-13 1989-10-26 Duesterloh Gmbh Walzenbrecher
EP0699388A2 (fr) * 1994-08-31 1996-03-06 ZAGO S.r.l. Remorque pour la démêlage, le hachage, le mixage et distribution de balles de fourage ou d'ensilage
US6000649A (en) * 1995-11-14 1999-12-14 Seko Spa Screw feeders with perfected profile for cutter-mixer-feeder wagon for fodder and grass or straw silage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3910115A1 (de) * 1988-04-13 1989-10-26 Duesterloh Gmbh Walzenbrecher
DE8805191U1 (de) * 1988-04-19 1988-10-27 Sax, Albert, 8300 Landshut Zerkleinerungsvorrichtung
EP0699388A2 (fr) * 1994-08-31 1996-03-06 ZAGO S.r.l. Remorque pour la démêlage, le hachage, le mixage et distribution de balles de fourage ou d'ensilage
US6000649A (en) * 1995-11-14 1999-12-14 Seko Spa Screw feeders with perfected profile for cutter-mixer-feeder wagon for fodder and grass or straw silage

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVI20090250A1 (it) * 2009-10-15 2011-04-16 Giuseppe Loppoli Trituratore perfezionato per biomasse organiche
EP2438991A1 (fr) * 2010-09-28 2012-04-11 UPM-Kymmene Corporation Procédé de traitement de matiere premiere de bois, et broyeur pour matiere premiere de bois
WO2017069621A1 (fr) * 2015-10-23 2017-04-27 Peeters Landbouwmachines B.V. Chariot mélangeur
CN108347900A (zh) * 2015-10-23 2018-07-31 佩特斯兰得堡机械有限公司 混合供料装置
EP3364753B1 (fr) 2015-10-23 2019-09-11 Peeters Landbouwmachines B.V. Melangeuse
US10827723B2 (en) 2015-10-23 2020-11-10 Peeters Landbouwmachines B.V. Mixing wagon
RU193155U1 (ru) * 2019-04-15 2019-10-15 федеральное государственное бюджетное образовательное учреждение высшего образования "Донской государственный технический университет" (ДГТУ) Установка для измельчения твердых материалов

Also Published As

Publication number Publication date
ITVI20010201A1 (it) 2003-03-24
EP1429867A1 (fr) 2004-06-23

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