EP3930925B1 - Sieb zur verwendung in spanplattenfabriken - Google Patents

Sieb zur verwendung in spanplattenfabriken Download PDF

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Publication number
EP3930925B1
EP3930925B1 EP20712836.4A EP20712836A EP3930925B1 EP 3930925 B1 EP3930925 B1 EP 3930925B1 EP 20712836 A EP20712836 A EP 20712836A EP 3930925 B1 EP3930925 B1 EP 3930925B1
Authority
EP
European Patent Office
Prior art keywords
screen
frame module
modules
module
screen according
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.)
Active
Application number
EP20712836.4A
Other languages
English (en)
French (fr)
Other versions
EP3930925A1 (de
Inventor
Ari MÄNNIKKO
Roland Schweizer
Dieter GEUGIS
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.)
Dieffenbacher GmbH Maschinen und Anlagenbau
Original Assignee
Dieffenbacher GmbH Maschinen und Anlagenbau
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
Priority claimed from FI20195146A external-priority patent/FI129210B/en
Priority claimed from DE102019131708.8A external-priority patent/DE102019131708A1/de
Application filed by Dieffenbacher GmbH Maschinen und Anlagenbau filed Critical Dieffenbacher GmbH Maschinen und Anlagenbau
Publication of EP3930925A1 publication Critical patent/EP3930925A1/de
Application granted granted Critical
Publication of EP3930925B1 publication Critical patent/EP3930925B1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B07B1/284—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens with unbalanced weights
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4645—Screening surfaces built up of modular elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens

Definitions

  • the object of the present invention is a screen according to the preamble of claim 1, the screen to be used in chipboard and OSB factories, the screen being implemented by means of meshes of different mesh sizes and comprising a number of mesh levels one above another, with which screen wood-based raw material is screened into different-sized fractions after chipping and drying, which screen comprises a frame part and a moving part.
  • OSB means Oriented Strand Board and is a well known term in this art of technology.
  • chipboard factory that could also include OSB factory.
  • the invention thus relates to a screen, making a circular motion, to be used in chipboard factories, with which screen wood-based raw material is screened into different fractions after chipping and drying.
  • the raw material is screened into face particles and core particles to be used in the chipboard manufacturing process.
  • Screens making a circular movement to be used in a chipboard factory are typically large steel structures in which a welded steel structure forms the frame of the device.
  • the screens in question conventionally comprise 2-4 screening levels formed from screen meshes that are inclined slightly with respect to the horizontal plane. The angle of inclination is generally 5-10°. The material being screened flows in the direction of the inclination.
  • the screen meshes are detachable and replaceable via doors or hatches in the outer sides of the screen.
  • the screen structure is arranged to move on an essentially circular path on the horizontal plane.
  • the screen in question is not, therefore, a screen vibrating back and forth, but instead is a screen making a circular motion, in which a constant centripetal acceleration rotating around an essentially vertical axis gets the material to be screened on top of and through the mesh levels.
  • a typical diameter of an orbit is 40-80 mm and the circulation speed 150-200 r/min.
  • the screens are supported on the frame structure either with suspension means, which are e.g. cables or hinged rods.
  • Another typical support structure is supporting from below on top of flexibly fastened supports that allow the relatively small circular screening motion of the screen with a relatively small resisting force.
  • a screen of double-layered structure is formed from two structures, each functioning essentially as a single-layer screen, one above the other.
  • the screening capacity can be substantially increased, in principle doubled, for a certain-sized area.
  • the screens making a circular movement to be used in a chipboard factory are typically large steel structures in which the width of the frame exceeds 3 m and the length of the frame is generally between 5-10 m. Such large steel structures are demanding to fabricate and, because of their large dimensions, expensive to transport.
  • CA 1 246 012 A which discloses a screen according to the preamble of claim 1, discloses such and similar screen arrangements.
  • the aim of the present invention is to provide a new type of rotary-motion screen for a chipboard factory, with which screen a cheaper manufacturing price and more advantageous transportation are achieved, and with which screen safe and economic dust explosion management in the case of double-layer screens is also realized.
  • the invention provides a screen according to claim 1.
  • the screen is characterized in that the moving part of the screen comprises two screen modules and one frame module and in that the frame module is between the screen modules.
  • One preferred embodiment of the screen according to the invention is characterized in that the walls facing towards the frame module of the screen modules are provided with explosion hatches for directing the pressure of a possible dust explosion into the space between the screen modules and from there either upwards or downwards into a free space.
  • Yet another preferred embodiment of the screen according to the invention is characterized in that the pressure of a dust explosion possibly occurring in a screen module is conducted in the frame module via at least one flame extinguisher.
  • center frame and the screen modules are different structures and are also manufactured in different ways, the manufacturing of them can be done in a factory specialized in the relevant manufacturing method for reducing manufacturing costs.
  • the auxiliary means to be used in manufacture e.g. welding jigs, are smaller and more ergonomic.
  • repairing a screen comprised of separate modules in the event of possible damage is less expensive than in screens according to prior art.
  • Fig. 1 thus presents the screen according to one embodiment of the invention. It comprises a frame structure and a moving part suspended from it.
  • the moving part of the screen could also be supported from below instead of being suspended.
  • the suspension here is implemented with hinged rods 3.
  • the moving part comprises two screen modules 4 and a frame module 5 between them.
  • a screen module comprises one screening chamber or a number of screening chambers essentially one above another separated structurally from each other, e.g. with a solid intermediate level, in each of which chambers the material for screening is screened into at least two fractions.
  • the screen is double-layered, in other words there are two screening chambers, one above the other, in each screen module 4.
  • the material to be screened is fed into the feeder hoppers in the manner indicated by the arrows 6 and the screened fractions are removed from the other end of the screen in a manner that is per se known in the art. Each fraction to its own conveyor.
  • the screen modules 4 comprise screening levels 7 ( Fig. 3 ) comprising screen meshes in a manner known in the art.
  • the screens and their screening levels 7 are inclined e.g. approx. 5-10° with respect to the horizontal plane, in which case the material being screened flows in the direction of the inclination when a horizontal rotating movement is induced in the moving part of the screen. Suspension from above or support from below permits the rotating movement in question.
  • the rotating movement can be brought about with at least one, but in the embodiment according to Fig. 2 with two, drive machineries 8 that are eccentric in their mass and at least mostly situated inside the frame module 5, the drive machineries having rotating shafts 9 that are essentially vertical and that produce in the screen a rotating force in relation to the vertical axis and thus a rotating trajectory on essentially the horizontal plane.
  • the eccentric masses of the rotation shafts 9 are marked with the reference number 10 and they are situated inside the frame module 5 thus reducing the space required by the screen.
  • center of mass of the one or more rotating drive shafts 9 disposed in the frame module 5 can be on essentially the same plane as the center of mass of the screen modules 4, which is the plane in the direction of mesh levels 7 of the screen module 4.
  • the screen in Fig. 3 is presented as viewed from the end and partly opened/sectioned.
  • the screening chambers of the screen modules are provided with explosion hatches that are per se known in the art.
  • the screen structure according to the invention having a frame module 5 in the center and screen modules 4 on both sides of the frame module, makes it possible that the walls facing towards the frame module 5 of the screen modules 4 or towards their screening chambers can be provided with explosion hatches 11 for directing the pressure of a possible dust explosion into the space between the screen modules (into the frame module 5) and from there either upwards or downwards into a free space. In the embodiment of Fig. 3 it is directed upwards, as the arrows indicate.
  • the pressure of a dust explosion can additionally be conducted via at least one flame extinguisher 12 in the frame module 5.
  • the screen modules 4 and the frame module 5 are dimensioned for transporting in a standard-sized sea container, which is advantageous for transporting them.
  • the screen has two drive shafts 9 that have rotating masses of different magnitudes to each other, in which case the resultant of the forces producing a rotational movement is directed at the center of mass of the moving structure.

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Claims (10)

  1. Sieb, zur Verwendung in Spanplatten- und OSB-Fabriken, wobei das Sieb mittels Maschen mit unterschiedlichen Maschenweiten umgesetzt ist und eine Reihe von Maschenebenen (7), die übereinander liegen, umfasst, wobei mit dem Sieb holzbasiertes Rohmaterial nach dem Zerkleinern und Trocknen in unterschiedlich große Fraktionen gesiebt wird, wobei das Sieb einen Rahmenteil (1) und einen beweglichen Teil (2) umfasst, das einen kreisförmige Bewegungsbahn beschreibt, wobei der bewegliche Teil (2) des Siebes zwei Siebmodule (4) und ein Rahmenmodul (5) umfasst, dadurch gekennzeichnet, dass sich das Rahmenmodul (5) zwischen den Siebmodulen (4) befindet.
  2. Sieb nach Anspruch 1, dadurch gekennzeichnet, dass die dem Rahmenmodul (5) zugewandten Wände der Siebmodule (4) mit Explosionsluken (11) versehen sind, um den Druck einer möglichen Staubexplosion in den Raum zwischen den Siebmodulen (4) und von dort entweder nach oben oder nach unten in einen freien Raum zu leiten.
  3. Sieb nach Anspruch 2, dadurch gekennzeichnet, dass der Druck einer möglicherweise in einem Siebmodul (4) auftretenden Staubexplosion über mindestens eine Flammenlöschvorrichtung (12) in das Rahmenmodul (5) geleitet wird.
  4. Sieb nach einem der Ansprüche 1-3, dadurch gekennzeichnet, dass das Rahmenmodul (5) mindestens eine Antriebsmaschine (8) umfasst, die hinsichtlich ihrer Masse exzentrisch ist und die eine im Wesentlichen vertikale Drehachse (9) aufweist, und die in dem Sieb eine Rotationskraft in Bezug auf die vertikale Achse und somit eine im Wesentlichen rotierende Bewegungsbahn auf der horizontalen Ebene erzeugt.
  5. Sieb nach einem der Ansprüche 1-4, dadurch gekennzeichnet, dass der bewegliche Teil (2) des Siebes von einer darunter liegenden Stützstruktur getragen wird, die eine kreisförmige Bewegungsbahn ermöglicht.
  6. Sieb nach einem der Ansprüche 1-4, dadurch gekennzeichnet, dass der bewegliche Teil (2) des Siebes von einer darüber liegenden Stützstruktur getragen wird, die eine kreisförmige Bewegungsbahn ermöglicht.
  7. Sieb nach einem der Ansprüche 1-6, dadurch gekennzeichnet, dass das Siebmodul (4) eine Siebkammer oder eine Reihe von Siebkammern umfasst, die im Wesentlichen übereinander liegen und strukturell voneinander getrennt sind, z. B. mit einer festen Zwischenebene, wobei in jeder der Kammern das Siebgut jeweils in mindestens zwei Fraktionen gesiebt wird.
  8. Sieb nach einem der Ansprüche 1-7, dadurch gekennzeichnet, dass die Siebmodule (4) und das Rahmenmodul (5) zum Transportieren in einem Seecontainer in Standardgröße dimensioniert sind.
  9. Sieb nach einem der Ansprüche 4-8, dadurch gekennzeichnet, dass sich der Massenschwerpunkt der einen oder mehreren rotierenden Antriebswellen (9), die in dem Rahmenmodul (5) angeordnet sind, im Wesentlichen auf derselben Ebene wie der Massenschwerpunkt der Siebmodule befindet, wobei es sich bei dieser um die Ebene in Richtung der Maschenebenen (7) des Siebmoduls (4) handelt.
  10. Sieb nach einem der Ansprüche 4-9, dadurch gekennzeichnet, dass das Sieb zwei Antriebswellen (9) aufweist, wobei die Antriebswellen rotierende Massen aufweisen, deren Größe sich voneinander unterscheidet, wobei in diesem Fall die Resultierende der Kräfte, die eine Rotationsbewegung erzeugt, auf den Massenschwerpunkt der sich bewegenden Struktur gerichtet ist.
EP20712836.4A 2019-02-28 2020-02-28 Sieb zur verwendung in spanplattenfabriken Active EP3930925B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20195146A FI129210B (en) 2019-02-28 2019-02-28 Sieve for use in chipboard factories
DE102019131708.8A DE102019131708A1 (de) 2019-11-25 2019-11-25 Sieb zur Benutzung in Anlagen zur Herstellung von Pressspanplatten
PCT/EP2020/055374 WO2020174098A1 (en) 2019-02-28 2020-02-28 A screen to be used in chipboard factories

Publications (2)

Publication Number Publication Date
EP3930925A1 EP3930925A1 (de) 2022-01-05
EP3930925B1 true EP3930925B1 (de) 2023-09-06

Family

ID=69903082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20712836.4A Active EP3930925B1 (de) 2019-02-28 2020-02-28 Sieb zur verwendung in spanplattenfabriken

Country Status (3)

Country Link
EP (1) EP3930925B1 (de)
CN (1) CN113710381A (de)
WO (1) WO2020174098A1 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1299522A (en) * 1969-02-24 1972-12-13 Douglas Ross Mullen Screening apparatus for granular materials
CH631092A5 (de) * 1978-05-02 1982-07-30 Buehler Ag Geb Freischwingender plansichter.
CA1130761A (en) * 1981-03-06 1982-08-31 Cecil T. Humphrey Multi deck suspended cleaner/classifier with centrally located eccentric vibrator
CA1246012A (en) * 1983-05-16 1988-12-06 Cecil T. Humphrey Vertically spaced eccentric weight agitators in a multi-deck classifier
ATE467451T1 (de) * 2003-06-12 2010-05-15 Axiom Process Ltd Vorrichtung und verfahren zum sieben von bohrschlamm
ITUD20070061A1 (it) * 2007-03-23 2008-09-24 Sergio Vecchiato Vaglio oscillante
CN101850335B (zh) * 2009-03-31 2014-05-21 株式会社佐竹 净化装置
CN108619810A (zh) * 2018-06-08 2018-10-09 金方圆安全技术研究院（苏州）有限公司 一种木质粉尘高效除尘控爆安全工程集成系统

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Publication number Publication date
WO2020174098A1 (en) 2020-09-03
CN113710381A (zh) 2021-11-26
EP3930925A1 (de) 2022-01-05

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