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EP0768123A1 - Crible à doigts - Google Patents

Crible à doigts Download PDF

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Publication number
EP0768123A1
EP0768123A1 EP96116370A EP96116370A EP0768123A1 EP 0768123 A1 EP0768123 A1 EP 0768123A1 EP 96116370 A EP96116370 A EP 96116370A EP 96116370 A EP96116370 A EP 96116370A EP 0768123 A1 EP0768123 A1 EP 0768123A1
Authority
EP
European Patent Office
Prior art keywords
profile
strip
screening device
support
profile strip
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.)
Withdrawn
Application number
EP96116370A
Other languages
German (de)
English (en)
Inventor
Anton Bokor
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.)
Ludwig Krieger Draht und Kunststofferzeugnisse GmbH
Original Assignee
Ludwig Krieger Draht und Kunststofferzeugnisse GmbH
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 US08/540,744 external-priority patent/US5769240A/en
Priority claimed from US08/630,422 external-priority patent/US5816412A/en
Application filed by Ludwig Krieger Draht und Kunststofferzeugnisse GmbH filed Critical Ludwig Krieger Draht und Kunststofferzeugnisse GmbH
Publication of EP0768123A1 publication Critical patent/EP0768123A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • B07B1/12—Apparatus having only parallel 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
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • 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

Definitions

  • the invention relates to a screening device according to the preamble of claim 1.
  • Finger screens are used in particular to classify difficult screenings, which quickly lead to screen clogging on conventional mesh screens. They are used in particular for pre-classifying the screenings in order to separate adhering, possibly also lubricating fine particles from the screenings to be obtained.
  • the invention has for its object to design a screening device so that each finger screen field can be easily replaced and the exchange remains essentially limited to the bars of a field in the event of wear or breakage. Furthermore, it is an object of the invention to provide an embodiment in which the rod spacing can be chosen as desired, in particular compared to the known sieves with fastening means reaching through between the rods.
  • the rods are firmly embedded at one end in the rubber-elastic profile strip, e.g. poured.
  • the rubber-elastic profile strip e.g. poured.
  • castable polyurethane in particular has proven to be particularly suitable.
  • this rubber-elastic profile strip is not firmly inserted into a support profile that meets the dynamic stresses and this is then fixed to the support structure with a large number of fastening means, but an intermediate element in the form of the support strip is proposed, which is attached to the support structure and the profile bar rests, which in turn is attached to the support bar.
  • the support strip is fastened only in the region of the side cheeks and on the longitudinal beams extending in the conveying direction Support structure is supported and that the fastening means penetrating through the profile strip and the supporting strip engage under the longitudinal beams, which form an abutment for the fastening means.
  • the longitudinal beams of the supporting structure of the sieve device merely form an abutment for the fastening means, in which they engage under the longitudinal beams, while they are supported on the profile strip at the opposite upper end, so that the latter is braced against the supporting structure together with the supporting strip.
  • a similar design is obtained when the supporting structure has appropriately designed crossbeams by providing several supporting strips running parallel in the conveying direction, which are supported on crossbeams of the supporting structure and are connected at the end to the supporting structure, and in that the fastening means penetrating the profiled strip and the supporting strip reach under the crossbeams, which form an abutment for the fasteners.
  • fastening means are designed as bolts which at one end have a fold under the longitudinal beams or the cross beams, at their other end the profile bar has a thread for a screw to be screwed against the profile bar Have mother.
  • the bolt which is approximately J-shaped, is inserted from below against the longitudinal or cross member and through corresponding openings in the support bar and the profile bar until the fold lies on the underside of the longitudinal or cross member.
  • the nut is then screwed onto the free end of the bolt on the profile bar until the profile bar and the support bar are firmly clamped against the cross member or longitudinal member.
  • the profile strip has a recess on its upper side, into which the nut is sunk.
  • the rods are firmly embedded at one end in a rubber-elastic profile strip, the profile strip on at least one extending between the side walls and with the Supporting structure connected support bar rests and is overlapped on the back and top by an angle profile and is releasably clamped between the support bar and the angle profile by means of fastening means reaching through the support bar.
  • the profile strip and support strip are also releasably attached and need Exchange only the profile bar with the rods to be replaced.
  • This embodiment also has the advantage that the fastening means do not engage between the bars, but the profile bar is clamped over its entire length between the angle profile and the support bar, so that the distance between the bars and thus the size of the sieve passage can be reduced.
  • the fasteners are also not exposed to wear, since they lie below the profile strip.
  • the rubber-elastic profile strip has a trapezoidal cross section and the upper leg of the U-shaped clamping profile forms an angle greater than 90 ° with the web, the inclination of the respective upper leg of the angle profile and the clamping profile being adapted to the profile strip and limit this receiving trapezoidal space.
  • the profile strip is evenly pretensioned on the clamping surfaces and pressed in the direction of the long leg of the angle profile.
  • a further preferred embodiment is characterized in that the angular profile has terminal end plates which are fastened to the side cheeks of the screening device by means of three screws, two screws penetrating elongated holes in the end plates, which lie on a circular arc with respect to the third screw, so that the inclination of the bars in the conveying direction of the material to be screened is adjustable.
  • the mounting rail with the end plates, which have a three-point fastening on the side walls of the Screening device is fixed, can be positioned due to the circular-shaped elongated holes in the end plates so that the rods have the desired inclination to the conveying direction to influence the dwell time of the material to be screened on the finger screen field.
  • FIG. 1 shows a first embodiment of a screening device, designated overall by 10, which consists of a vibrating screen 12, finger screen fields 14 and fastening units 16.
  • the vibrating screen 12 has a longitudinal axis extending in the direction of the arrow “X” and a transverse axis “Y” extending at right angles thereto.
  • the vibrating screen also has longitudinal members 32, 33.
  • the fastening units 16 are in particular intended to be fixed on the side members 32, 33 of the vibrating screen.
  • 1 has side walls 20 and 22, which are arranged vertically and essentially parallel to one another, and a rear wall 24, which is likewise arranged vertically and transversely to the side walls 20, 22. These walls enclose a substantially rectangular space 18.
  • upper cross members 29 and 34 and lower cross members 30 are provided, which are connected to the side members 32 and the side walls 20, 22 of the rear wall 24.
  • a vibration drive 100 has an eccentric shaft housing 102 which is fastened to the side cheeks 20, 22 via fastening elements 104.
  • a conventional eccentric mechanism 110 is arranged within the space formed by the eccentric shaft housing 102.
  • the Eccentric mechanism usually consists of a central drive shaft 112 with a central section 114, an intermediate section 116 and an end section 118.
  • the intermediate section 116 has a smaller diameter than the central section 114 and the end section 118 in turn has a smaller diameter than the intermediate section 116.
  • a pair of bearing flanges 120 with ball bearings are arranged on the intermediate section 116.
  • the bearing flanges 120 have a plurality of holes 122 which are aligned with corresponding holes 124 and the side cheeks 20 and 22 and through which fastening elements 104 pass.
  • Eccentric counterweights 126 with holes 128 are supported and reset on the intermediate section 116 to vibrate the finger screen fields 14.
  • the face plates 130 and 136 have openings 132 that are aligned with corresponding openings in the counterweights 126.
  • the face plates 130 and 136 and the counterweights 126 are connected to one another by screws 134.
  • the face plate 136 is at the same time the drive pulley and is surrounded by a belt 138, which in turn wraps around a pulley on the output shaft of a drive motor 140.
  • the screening device 10 has longitudinally extending clamping rails 35 with a series of holes 38 for receiving fastening means 64 in order to fasten the clamping rails 35 to the side cheeks 20 and 22.
  • the rods 44 or 45 can be stabilized by cross wires 49 which are designed in the manner of weft threads of a fabric. This also allows the sieve passage in the largest dimension of the particulate material to be determined (FIGS. 7 and 9).
  • the sieve device also has fastening units 16 for releasably fastening the finger sieve fields 14 to the vibrating sieve 12.
  • Each fastening unit 16 consists of a support strip 50 in the form of a strip section 51 which has a plurality of holes 52.
  • the strip section 51 also has a pair of substantially parallel flanges 54 which are used for attachment to the terminal strips 35.
  • the transverse distance between adjacent finger screen fields 14 can be determined by specifying the transverse dimension of the flanges 54.
  • fastening means 60, 62 are provided. These are inserted into holes 48 and 52 and then connected to the vibrating screen.
  • the fastening means have J-shaped bolts 62, which preferably have a U-shaped lower fold 63. These fastening means 62 pass through the holes 48 and 52 and, with their fold, reach under the middle longitudinal members 33. The fastening of the finger screen fields with the middle longitudinal member 33 and thus with the vibrating screen 12 is described in more detail in FIGS. 3 and 4.
  • the end flanges 54 engage behind the longitudinal clamping rails 35. It should also be pointed out that the underside of the support strips 50 rest on the longitudinal member with the interposition of a rubber-elastic damping strip 37.
  • the finger screen system 10a according to FIG. 2 differs from that according to FIG. 1 in that it has lower cross members 31 and a transverse clamping rail 36 instead of longitudinal clamping rails 35.
  • the clamping rail 36 is attached to cross beams 31a and 31b by clamping rail fastening elements 64, which pass through holes 38 in the clamping rails 36 and are fixed by means of a nut and washer.
  • the fastening unit 16a is provided, which has transverse support strips 50 with holes 52 and longitudinal support strips 55 with holes 56.
  • the connecting strips 55 also have upward-facing flanges 57 and downward-facing flanges 58, which correspond to one another and serve to connect the connecting strips 52 to the transverse clamping rail 36 and the terminal cross member 31b.
  • the finger screen field 14 in turn has a profile strip 40 in which the rods 44 are firmly embedded.
  • the finger screen field is attached to the side walls of the screening machine with end plates 59.
  • the finger screen field 14 has an angular profile 67 which has an upper leg 68 and an essentially upright longer leg 69.
  • the angle between the upper leg 68 and the upright leg 69 is less than 90 °, so the upper leg 68 is bent slightly downwards.
  • the rods 44 are embedded with their fastening-side end in the rubber-elastic profile strip 40, which has a trapezoidal cross section. Their opposing surfaces 70, 71 thus diverge in the direction of the upright long leg 69 of the angle profile 67 bent transversely to the rod axis.
  • the end plates 59 are fastened to the side cheeks by means of three screws.
  • the end plates 59 have a circular hole 80 and two elongated holes 81, 82, the axis of which describes an arc around the hole 80.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
EP96116370A 1995-10-11 1996-10-11 Crible à doigts Withdrawn EP0768123A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US540744 1983-10-11
US08/540,744 US5769240A (en) 1995-10-11 1995-10-11 Screening systems and methods for screening particulate material
US08/630,422 US5816412A (en) 1996-04-02 1996-04-02 Screening systems and methods for screening particulate material
US630422 1996-04-02

Publications (1)

Publication Number Publication Date
EP0768123A1 true EP0768123A1 (fr) 1997-04-16

Family

ID=27066515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96116370A Withdrawn EP0768123A1 (fr) 1995-10-11 1996-10-11 Crible à doigts

Country Status (1)

Country Link
EP (1) EP0768123A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT412788B (de) * 2003-10-15 2005-07-25 Andritz Ag Maschf Sieb- bzw. sortiervorrichtung
DE202009016047U1 (de) 2009-11-24 2010-02-18 Gustav Meister GmbH Spezialfabrik für Industriesiebe Siebelement, Siebelementträger und Siebfläche für eine Siebmaschine
DE202013100941U1 (de) 2013-03-05 2013-04-15 Spaleck Gmbh & Co Kg Siebvorrichtung mit mindestens einem Fingersieb
CN104549985A (zh) * 2014-11-21 2015-04-29 椿中岛机械（重庆）有限公司 钢球自动分选装置
EP3566785A1 (fr) * 2018-04-20 2019-11-13 Terex GB Limited Appareil de criblage à support de crible amélioré
CN111992488A (zh) * 2020-09-17 2020-11-27 济南中燃科技发展有限公司 一种复合振动筛筛分装置及振动筛

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3241671A (en) * 1964-02-12 1966-03-22 Herbert C Brauchla Vibratory comb sizer
GB1322014A (en) * 1970-05-09 1973-07-04 Tufdura Ltd Resilient screen plate for grading particulate materials
GB2233582A (en) * 1989-07-13 1991-01-16 Bord Na Mona Screening apparatus
GB2247850A (en) * 1990-08-24 1992-03-18 Shattock Ltd A screen
EP0631825A1 (fr) * 1993-06-30 1995-01-04 SBM WAGENEDER Gesellschaft m.b.H. Crible à doigts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3241671A (en) * 1964-02-12 1966-03-22 Herbert C Brauchla Vibratory comb sizer
GB1322014A (en) * 1970-05-09 1973-07-04 Tufdura Ltd Resilient screen plate for grading particulate materials
GB2233582A (en) * 1989-07-13 1991-01-16 Bord Na Mona Screening apparatus
GB2247850A (en) * 1990-08-24 1992-03-18 Shattock Ltd A screen
EP0631825A1 (fr) * 1993-06-30 1995-01-04 SBM WAGENEDER Gesellschaft m.b.H. Crible à doigts

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT412788B (de) * 2003-10-15 2005-07-25 Andritz Ag Maschf Sieb- bzw. sortiervorrichtung
DE202009016047U1 (de) 2009-11-24 2010-02-18 Gustav Meister GmbH Spezialfabrik für Industriesiebe Siebelement, Siebelementträger und Siebfläche für eine Siebmaschine
DE202013100941U1 (de) 2013-03-05 2013-04-15 Spaleck Gmbh & Co Kg Siebvorrichtung mit mindestens einem Fingersieb
CN104549985A (zh) * 2014-11-21 2015-04-29 椿中岛机械（重庆）有限公司 钢球自动分选装置
EP3566785A1 (fr) * 2018-04-20 2019-11-13 Terex GB Limited Appareil de criblage à support de crible amélioré
US11607708B2 (en) 2018-04-20 2023-03-21 Terex Gb Limited Screening apparatus with improved screen media
CN111992488A (zh) * 2020-09-17 2020-11-27 济南中燃科技发展有限公司 一种复合振动筛筛分装置及振动筛

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