EP0081471A1 - Système de criblage - Google Patents

Système de criblage Download PDF

Info

Publication number
EP0081471A1
EP0081471A1 EP82850244A EP82850244A EP0081471A1 EP 0081471 A1 EP0081471 A1 EP 0081471A1 EP 82850244 A EP82850244 A EP 82850244A EP 82850244 A EP82850244 A EP 82850244A EP 0081471 A1 EP0081471 A1 EP 0081471A1
Authority
EP
European Patent Office
Prior art keywords
screen
elements
screening system
deck
stiffening
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.)
Granted
Application number
EP82850244A
Other languages
German (de)
English (en)
Other versions
EP0081471B1 (fr
Inventor
Bengt Lars Arne Dehlen
Sven Erik Dyrup
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.)
Trelleborg AB
Original Assignee
Trelleborg AB
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26658032&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0081471(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from SE8201272A external-priority patent/SE428763B/sv
Application filed by Trelleborg AB filed Critical Trelleborg AB
Priority to AT82850244T priority Critical patent/ATE28414T1/de
Publication of EP0081471A1 publication Critical patent/EP0081471A1/fr
Application granted granted Critical
Publication of EP0081471B1 publication Critical patent/EP0081471B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • B07B1/48—Stretching devices for screens
    • 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
    • B07B1/48—Stretching devices for screens
    • B07B1/49—Stretching devices for screens stretching more than one screen or screen section by the same or different stretching means

Definitions

  • the present invention relates to a screen comprising a screen frame with supporting elements for a screen deck inserted in the screen frame, and fastening means for the screen deck.
  • screening machines with small individually fastenable screen elements are not often used since they necessitate reconstruction of existing screening machines.
  • the most commonly used variant of screening machines makes use instead of screen cloths of substantial size, very often 1-2 m 2 per unit.
  • This type of screen cloths are fastened in the screen frames by providing the screen cloth units with hooks by which the screen cloth units are clamped between opposed edges of the screen frame.
  • An example of such a clamping method is disclosed in DE-OS 2,005,376.
  • This fastening method is utilized for the majority of all screening machines which at present are manufactured all over the world, as a result of which the frame constructions of most screening machines are of a similar kind.
  • it has been tried to divide the screen deck into smaller units which are readily exchangeable to facilitate rapid exchange of a worn section and also to afford an opportunity for rapidly shifting from one hole size to another within a section of the screen deck.
  • a screen comprising a screen frame with supporting elements for a screen deck mounted in the screen frame and fastening means for the screen deck, that the said screen deck comprises several elongated screen elements placed adjacent each other and having stiffening elements which are included in the screen elements and which, upon mounting in the screen frame, are prestressed against the supporting elements by elastic deformation.
  • the invention thus is based on the idea that the separate screen elements forming said screen deck should be formed as elongated and rigid plank-like elements and, upon mounting, be subjected to an elastic deformation in order to provide the required holding-down force against the supporting elements of the screen frame.
  • the present invention makes it much easier to apply the requisite holding-down force against the supporting elements of the screen frame.
  • the screen frame is designed in such a manner that the supporting elements force the screen elements to curve convexly, the screening elements can be formed with straight stiffening elements.
  • One end of the screen elements is then secured to the frame, and the screen elements are bent over the supporting elements to be secured underneath a hold-down rib at the opposite side of the screen frame.
  • the force required for bending the screen elements will be considerably less than a force directed in the plane of the screen elements and applied in order to stretch the screen elements to such an extent that- the same holding-down force is obtained.
  • the screening system according to the invention can be utilized not only for screening machines in which the screen decks are curved convexly, but also in screening machines with planar decks. In such a case, it is possible, according to a development of the invention, to plastically deform the stiffening elements in a direction opposite to the elastic deformation to which the stiffening elements are subjected during mounting of the screen elements in the screening machine. In the present invention, it is best if the stiffening elements, when the screen elements are mounted in the screen frame, are subjected to an elastic deformation whose spring-back force resultant is at least as large as an inertia resultant acting on the screen elements in the opposite direction, when the screen elements are used in a dynamic screening machine.
  • the present invention therefore relates also to a screening system comprising a screen frame with supporting elements for a screen deck mounted in the screen frame, and fastening means for the screen elements, said system being characterised in that the screen deck comprises several juxtaposed elongated screen elements in which stiffening elements are inserted at least on the opposite long sides thereof, and that the fastening means comprise permanent magnets and armatures of magnetic material cooperating therewith. As has been mentioned before, these armatures may form the stiffening elements in the screen deck.
  • the screen elements in the screening system of the present invention preferably are formed for overlap jointing at their side edges extending along one another.
  • the screen elements should be formed as elongated elements similar to planks.
  • the elements In order to promote the elastic deformation which is required for bringing about the necessary holding-down force, it is best if the elements have a length to width ratio of at least 3:1, preferably at least 4:1 or, which is even better, at least 5:1.
  • the stiffening elements will lie closer to one another, and thus the total holding-down force will be greater, without it being necessary, upon mounting of the individual elements, to exert an inconveniently great force on the free ends of the elements when they are bent down and mounted in the screen frame.
  • these magnets should be disposed on the supporting elements of the screen frame, preferably by being connected therewith via elastic dampers.
  • Fig. 1 shows a screen element consisting of an - elastomer, for instance natural or synthetic rubber, such as polyurethane.
  • the screen element has holes 2 made during the manufacture of the element.
  • Reinforcing or stiffening elements 3 are inserted along the longitudinal sides of the screen element. These reinforcing elements are made of rigid material and may consist of metallic square tubes, as illustrated in the drawings. If necessary, the screen elements may also be reinforced with a suitable number of laid-in stiffening elements 4 extending at right angles to the stiffening or reinforcing elements 3.
  • the screen element is then formed for overlap jointing by being provided with a recess 5 at one long side and an overlap flange 6 at the other long side.
  • Fig. 2 shows an example of a screen frame in a screening machine.
  • the screen frame has side members 7, hold-down ribs 8 and longitudinal supporting elements 9.
  • the side members 7 also are provided with supporting surfaces 10.
  • the supporting surfaces 10 and the supporting elements 9 are mounted at different levels, such that the screen elements 1 will curve upwardly over the supporting elements 9.
  • the screen elements are mounted by clamping their one ends against the supporting surface 10 by means of the hold-down rib 8, whereupon the elements are pressed down over the supporting elements 9 by being subjected to a force in the direction of the arrow 11. Finally, the elements 1 are retained in this elastically deformed position by securing the hold-down rib 8 to the left in Fig. 2.
  • the present invention thus utilizes the elasticity or spring force provided by the stiffening elements 3 in order to obtain the requisite holding-down action against the supporting elements 9 during the subsequent use of the screening machine.
  • the holding-down action can.be very large if an appropriate material is selected for the stiffening elements 3.
  • These elements may - consist of, for example, metallic material which is rigid and can be subjected to heavy elastic deformation without surpassing the 0.2% yield strength during mounting.
  • the invention has been utilized in connection with a screening machine with a convexly curved screen deck.
  • the invention may also be utilized with screening machines in which the finished screen deck is planar, in which case the stiffening elements may have been subjected to a plastic predeformation (see Fig. 3) such that the screen elements are curved in a direction opposite to the elastic deformation imparted to them during mounting.
  • this plastic predeformation is illustrated by the arrows 12 which indicate the amount by which the screen elements deviate from a straight line 13.
  • Figs. 4-6 it is possible in accordance with Figs. 4-6, to provide a holding-down force by means of permanent magnets 13 which, by means of resilient holders 14 serving as dampers, are mounted on the longitudinal supporting elements 9 of the screen frame.
  • the holders 14 are fixedly mounted on the longitudinal supporting elements 9 by means of a holder plate 15 secured by means of bolts 16 (Fig. 5) or by welding (Fig. 6).
  • the permanent magnets 13 attract the stiffening elements 3 which are inserted in the screen elements and which, in this instance, must consist of magnetic material to be able to function as armatures. As will appear from Fig. 4, the magnets 13 can be placed at suitable intervals across the screening surface, such that the magnets can be used for retaining the stiffening elements 3 of two juxtaposed screen elements.
  • the use of magnetic retention means makes mounting and dismounting much simpler than in known mounting systems. With magnets, the magnetic force can be used as the only retention force, but it is also possible to utilize the above-mentioned deformation of the screen elements to produce a more powerful holding-down action.
  • the invention has been described above with reference to a screen frame in which the screening cloth elements extend from one side to the other. However, the invention may be used also with screening machines designed in a different manner, in which the screening deck is divided into two or more juxtaposed areas, as shown in Fig. 7.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Vehicle Body Suspensions (AREA)
  • Eye Examination Apparatus (AREA)
  • Transplanting Machines (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Surgical Instruments (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Bipolar Transistors (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Paper (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP82850244A 1981-12-07 1982-11-29 Système de criblage Expired EP0081471B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82850244T ATE28414T1 (de) 1981-12-07 1982-11-29 Siebsystem.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8107293 1981-12-07
SE8107293 1981-12-07
SE8201272 1982-03-02
SE8201272A SE428763B (sv) 1981-12-07 1982-03-02 Anordning vid en sikt

Publications (2)

Publication Number Publication Date
EP0081471A1 true EP0081471A1 (fr) 1983-06-15
EP0081471B1 EP0081471B1 (fr) 1987-07-22

Family

ID=26658032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82850244A Expired EP0081471B1 (fr) 1981-12-07 1982-11-29 Système de criblage

Country Status (11)

Country Link
EP (1) EP0081471B1 (fr)
JP (1) JPS58502040A (fr)
AT (1) ATE28414T1 (fr)
AU (1) AU554492B2 (fr)
CA (1) CA1202602A (fr)
DE (1) DE3276789D1 (fr)
DK (1) DK151461C (fr)
ES (1) ES8308232A1 (fr)
FI (1) FI73901C (fr)
NO (1) NO156438C (fr)
WO (1) WO1983002075A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996026017A1 (fr) * 1995-02-24 1996-08-29 Svedala Faço Ltda. Tamis vibrant modulaire
WO2000066281A1 (fr) * 1999-05-03 2000-11-09 Usf Johnson Screens Pty Ltd Materiel de criblage
EP2081697A1 (fr) * 2006-09-29 2009-07-29 M-I Llc Serrage magnétique de tamis
CN102873025A (zh) * 2012-09-29 2013-01-16 山东润科机电设备有限公司 振动筛
EP4176981A1 (fr) * 2021-11-09 2023-05-10 Steinhaus GmbH Système de fixation de panneau de criblage à positionnement automatique

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3628418A1 (de) * 1986-08-21 1988-02-25 Krupp Gmbh Sieb mit auswechselbarem siebbelag
US5586661A (en) * 1994-12-15 1996-12-24 Illinois Tool Works Inc. Dam member for a screen deck
US5755334A (en) * 1996-03-19 1998-05-26 Illinois Tool Works Inc. Method and apparatus for mounting a panel on a support member
CN113893599B (zh) 2020-07-06 2022-07-01 河北冠能石油机械制造有限公司 用于泥浆振动筛的振动筛筛网

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2910180A (en) * 1955-03-07 1959-10-27 Tyler Co W S Screen deck structure
CH495791A (de) * 1968-09-25 1970-09-15 Steinhaus Gmbh Siebboden aus vorgefertigten, elastischen Platten
FR2047758A1 (fr) * 1969-05-16 1971-03-12 Bridgestone Tire Co Ltd
DE2461237A1 (de) * 1974-12-23 1976-07-01 Hein Lehmann Ag Spannbarer, elastischer siebboden
US4120784A (en) * 1976-06-16 1978-10-17 N. Greening Limited Screening apparatus
US4141821A (en) * 1976-05-21 1979-02-27 Firma Steinhaus Gmbh Screening deck assembly
DE2754374A1 (de) * 1977-12-07 1979-06-13 Kueper Gummi Spannbarer siebboden
DE2932696A1 (de) * 1979-08-11 1981-02-19 Heinz D Gaertner Gmbh Siebboden aus gummi oder kunststoff fuer spann- oder plansiebe

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5521037B1 (fr) * 1971-03-23 1980-06-06
JPS6018525Y2 (ja) * 1979-09-04 1985-06-05 不二サッシ株式会社 引戸戸先の引寄せ装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2910180A (en) * 1955-03-07 1959-10-27 Tyler Co W S Screen deck structure
CH495791A (de) * 1968-09-25 1970-09-15 Steinhaus Gmbh Siebboden aus vorgefertigten, elastischen Platten
FR2047758A1 (fr) * 1969-05-16 1971-03-12 Bridgestone Tire Co Ltd
DE2461237A1 (de) * 1974-12-23 1976-07-01 Hein Lehmann Ag Spannbarer, elastischer siebboden
US4141821A (en) * 1976-05-21 1979-02-27 Firma Steinhaus Gmbh Screening deck assembly
US4120784A (en) * 1976-06-16 1978-10-17 N. Greening Limited Screening apparatus
DE2754374A1 (de) * 1977-12-07 1979-06-13 Kueper Gummi Spannbarer siebboden
DE2932696A1 (de) * 1979-08-11 1981-02-19 Heinz D Gaertner Gmbh Siebboden aus gummi oder kunststoff fuer spann- oder plansiebe

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996026017A1 (fr) * 1995-02-24 1996-08-29 Svedala Faço Ltda. Tamis vibrant modulaire
WO2000066281A1 (fr) * 1999-05-03 2000-11-09 Usf Johnson Screens Pty Ltd Materiel de criblage
US6685028B1 (en) 1999-05-03 2004-02-03 Weatherford Australia Pty. Limited Screening equipment
EP2081697A1 (fr) * 2006-09-29 2009-07-29 M-I Llc Serrage magnétique de tamis
EP2081697A4 (fr) * 2006-09-29 2012-11-28 Mi Llc Serrage magnétique de tamis
CN102873025A (zh) * 2012-09-29 2013-01-16 山东润科机电设备有限公司 振动筛
EP4176981A1 (fr) * 2021-11-09 2023-05-10 Steinhaus GmbH Système de fixation de panneau de criblage à positionnement automatique

Also Published As

Publication number Publication date
DE3276789D1 (en) 1987-08-27
FI831639L (fi) 1983-06-08
DK278683A (da) 1983-06-23
NO831442L (no) 1983-06-23
WO1983002075A1 (fr) 1983-06-23
DK278683D0 (da) 1983-06-16
ATE28414T1 (de) 1987-08-15
FI831639A0 (fi) 1983-05-11
FI73901C (fi) 1987-12-10
ES517937A0 (es) 1983-08-16
DK151461C (da) 1988-05-30
ES8308232A1 (es) 1983-08-16
DK151461B (da) 1987-12-07
JPS58502040A (ja) 1983-12-01
CA1202602A (fr) 1986-04-01
EP0081471B1 (fr) 1987-07-22
AU554492B2 (en) 1986-08-21
NO156438C (no) 1987-09-23
AU1016083A (en) 1983-06-30
FI73901B (fi) 1987-08-31
NO156438B (no) 1987-06-15

Similar Documents

Publication Publication Date Title
US5361911A (en) Screening panel attachment system
US4120784A (en) Screening apparatus
US5377846A (en) Particle screening system
US6153041A (en) Screen assembly for vibratory screening machine and method of fabrication thereof
US6220448B1 (en) Screen assembly for vibratory screening machine
US6253926B1 (en) Modular screen panel
EP0081471A1 (fr) Système de criblage
EP1205261A3 (fr) Renforcement pour un cadre d'appui moulé d'un tamis de filtrage
US4190527A (en) Interlocking screen elements
EP0364541B1 (fr) Tamis avec elements de toile de tamis se chevauchant
US5735409A (en) Screen cloth element and screen cloth for making the same
US5829599A (en) Screening apparatus
EP0062675B1 (fr) Tamis
DE69701616T2 (de) Fachbildungsvorrichtung, Verfahren für deren Zusammenbau und Jacquardwebmaschine mit einer solchen Vorrichtung
AU9721898A (en) Particle screening system
WO1998033604A1 (fr) Crible dote d'elements a toile de criblage allonges se chevauchant
DE3811641A1 (de) Siebmatte aus gewebe
SE428763B (sv) Anordning vid en sikt
EP0185409A3 (fr) Tamis vibrant
SU1641469A1 (ru) Вибрационный грохот
US4545421A (en) Nonskid box studs
AU729679B2 (en) Particle screening system
CA1184538A (fr) Ecran ajoure
WO2003047771A1 (fr) Moyens de fixation pour ecrans
CS251411B1 (cs) Třídicí plocha vibračního třídiče

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE DE FR GB IT SE

17P Request for examination filed

Effective date: 19831214

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE FR GB IT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19870722

Ref country code: AT

Effective date: 19870722

REF Corresponds to:

Ref document number: 28414

Country of ref document: AT

Date of ref document: 19870815

Kind code of ref document: T

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3276789

Country of ref document: DE

Date of ref document: 19870827

ITF It: translation for a ep patent filed

Owner name: ING. A. GIAMBROCONO & C. S.R.L.

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: STEINHAUS GMBH

Effective date: 19880420

26 Opposition filed

Opponent name: SKEGA AB

Effective date: 19880421

Opponent name: STEINHAUS GMBH

Effective date: 19880420

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19891107

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19891121

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19891127

Year of fee payment: 8

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19891130

Year of fee payment: 8

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19900507

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state
EUG Se: european patent has lapsed

Ref document number: 82850244.3

Effective date: 19900926