EP0641608A2 - Appareil cribleur - Google Patents

Appareil cribleur Download PDF

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Publication number
EP0641608A2
EP0641608A2 EP94112804A EP94112804A EP0641608A2 EP 0641608 A2 EP0641608 A2 EP 0641608A2 EP 94112804 A EP94112804 A EP 94112804A EP 94112804 A EP94112804 A EP 94112804A EP 0641608 A2 EP0641608 A2 EP 0641608A2
Authority
EP
European Patent Office
Prior art keywords
screen
screening machine
longitudinal
machine according
designed
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Withdrawn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
EP94112804A
Other languages
German (de)
English (en)
Other versions
EP0641608A3 (fr
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.)
Frambs & Freudenberg GmbH
Original Assignee
Frambs & Freudenberg 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
Application filed by Frambs & Freudenberg GmbH filed Critical Frambs & Freudenberg GmbH
Publication of EP0641608A2 publication Critical patent/EP0641608A2/fr
Publication of EP0641608A3 publication Critical patent/EP0641608A3/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Withdrawn legal-status Critical Current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
    • 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
    • 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 machine for classifying, dewatering, sorting or conditioning conversion of bulk goods, but also for separating foods such as sugar beets, potatoes, carrots or the like. of soil, also for separating fibrous materials from process water, for classifying wood chips and the like.
  • Such screening machines have a machine frame, the basic structure of which has two mutually parallel vertical side walls which are connected to one another by means of cross members.
  • a row of screen coverings is arranged in one plane on the cross members, which are generally arranged one above the other in several rows.
  • the machine frame is supported by spring bearings against foundations, in such a way that the screen coverings are arranged in an inclined or rising or horizontal plane from an inlet end to an outlet end.
  • a vibratory drive engages the machine frame.
  • wire mesh, wire mesh, plastic mesh, PU screen coverings, rubber screen coverings, screen coverings made of sheet steel or section steel or welding gap screens or ropes are used as screen coverings.
  • the screen coverings can be fastened in such a way that cross-tensioned screen coverings, longitudinally tensioned screen coverings, plane screen coverings, plug-in system screen coverings are involved.
  • the construction of the screening machines is adapted to the attachment of the screening surfaces, i.e. In order to replace a sieve covering of one type with a sieve covering of another category, considerable design changes to the sieving machine are required.
  • the invention has for its object to design a screening machine so that different screen linings are used on a screening machine can be made without having to change the design of the screening machine.
  • the basic principle is that when using different screen coverings, in particular plug-in system screen coverings, cross-tension screen coverings and longitudinal tension screen coverings, the machine frame and the clamping devices remain unchanged.
  • the design of the tensioning devices according to claim 2 and further according to claims 3 to 5 enables the tensioning devices push-fit system screen linings downward in the direction of the side members or cross-tensioning screen linings braced in the direction of the corresponding side wall, so that they relate to the cant - Bars are pressed.
  • the tensioning devices can also be provided with sealing lips for sealing against the screen covering and / or the side wall. The same applies to the use of longitudinal tension screen coverings according to claim 6.
  • the embodiment according to claim 7 ensures that when changing the type of screen covering only the supports have to be released from the side members.
  • These conditions can be formed according to claim 8 in the configuration of the screen coverings as plug-in system screen coverings as connecting elements which engage in adapted recesses of screen coverings. If, on the other hand, the screen coverings are designed as cross-tensioning screen coverings, then the supports are designed as cantilever strips, claims 10 and 11 reflecting particularly advantageous possibilities for this.
  • Claim 12 shows the corresponding design for longitudinal tension screen coverings.
  • the screening machine shown in particular in FIGS. 1 and 2 has an approximately box-shaped machine frame 1, which has two side walls 2, 3 arranged parallel to one another and vertically, which are joined together by a row of upper cross members 4 and a row of lower cross members 5 are connected so that this frame 1 is rigid in itself.
  • swing bearings 6 are attached, by means of which the frame 1 is supported on frame-like foundations 7, 8, which in turn are supported with respect to the floor 9. Due to the fact that one foundation 7 is higher than the other foundation 8, the frame 1 is arranged overall inclined, as can be seen from FIG. 1.
  • an oscillating drive 10 is provided which extends through the frame 1 and thus acts in the same way on both side walls 2, 3 and which is designed in a conventional manner and which can basically be a circular oscillating drive, an eccentric oscillating drive or a linear oscillating drive. This is not important for the explanation of the screening machine.
  • longitudinal members 11 are attached parallel to one another and at equal lateral distances, the upper sides 12 of which are therefore each in one plane. Screen linings are supported on these side members 11 in a manner still to be shown. In the illustrated embodiment, it is the one on the upper cross members 4 supported screen covering around a plug-in system screen covering 13 and with a screen covering supported on the lower cross members 5 around a cross-tensioning screen covering 14.
  • an outwardly projecting inlet box 16 is attached to the upper inlet end 15 of the frame 1, in which the material to be screened or classified can be distributed over the full width of the frame 1 at the inlet.
  • an upper outlet area 18 is formed which is integrated into the frame 1 and projects beyond it.
  • the lower sieve coverings 14 there is no need for a separate inlet box 16, since only material that has been sieved through the upper sieve coverings 13 gets there.
  • the lower sieve coverings 14 also have a lower outlet area 19 integrated into the frame 1 and projecting therefrom in the material flow direction 17.
  • a funnel (not shown) is usually arranged below the sieve coverings 14, into which the material screened through the lower sieve coverings 14 passes.
  • the plug-in system screen coverings 13 are fastened on the longitudinal beams 11 by means of connecting elements 22 serving as supports.
  • These connecting elements 22 are designed in the form of strips and have a cross section as can be seen from the detailed illustration in FIG. 3.
  • Such a connecting element 22 has a semi-cylindrical head strip 23, which is supported against a base strip 25 via a web 24.
  • a connecting bar 26 extends downward from the underside of this base bar 25 and has a barbed widening locking bar 28 provided with a compression slot 27 in the middle.
  • the connecting bar 26 is adapted to the slot 29 in the top 12 of the respective longitudinal member 11 so that it sits firmly in this.
  • the locking bar 28 is located in the interior 30 of the side member 11 its outer inclined surfaces 31 and the compression slot 27, it can be pushed relatively easily through the slot 29 of the side member 11, after which it then springs open again and causes a firm locking between the connecting element 22 and the side member 11.
  • the strip-shaped connecting element 22 lies with its base strip 25 on the upper side 12 of the respective longitudinal member 11.
  • two screen coverings 13 arranged next to one another transversely to the material flow direction 17 are on the one hand by means of the head strip 23, the web 24 and the base strip 25 with a nose strip 34 in all directions transverse to the material flow direction 17 with one another and with the respective longitudinal member 11 and thus with the machine - Frame 1 connected.
  • a strip-shaped connecting element 22 ′ is provided for the plug-in system screen coverings 13 adjoining a side wall 2 or 3, as shown in FIG. 4.
  • the web 24 and the base strip 25 are replaced by a stiffening strip 38 with, for example, approximately a square cross-section, so that the half head strip 23 ', the half web 24' and the half base strip 25 'are still fixed the frame 33 are connected.
  • the plug-in system screen coverings 13 are designed in the form of plates, each extending from one side member 11 to the adjacent side member 11, the cross-tensioning screen coverings 14 extend over the full width of the machine frame 1, as shown in FIG. 2 below emerges. They are fastened between the side walls 2, 3 by means of a fastening strip 39 resting on the top of the associated side member 11. Between this respective fastening and the edge adjacent to the respective side wall 2 or 3, the screen coverings 14 are inflated, that is to say arched upwards. In the bottom left in Fig. 2 This is achieved by using longitudinal cantilever bars 40, 40 ', 40''which serve as supports and which are connected to the respective longitudinal beam 11 by means of a connecting bar 26 with a locking bar 28 on its underside.
  • the elevation is achieved by means of crossbars 41 serving as supports, which crosswise to the material flow direction 17 each from a side wall 2 or 3 to the center, i.e. extend to the mounting strip 39.
  • the cross bars 41 are arched upwards so that they give the cross tension screen covering 14 resting on them the described cant.
  • the crossbar 41 can be attached to the longitudinal beams 11 by a lock, as has already been shown and described for the connecting elements 22, 22 'and the longitudinal bars 40, 40', 40 '', the locking bars 28 and the connecting strips 26 in the material passage direction 17 have only a small length, which corresponds approximately to the thickness of the canting cross strips 41.
  • strip-shaped tensioning devices 42 are provided, which are basically the same for the plug-in system screen coverings 13 on the one hand and the cross-tensioning screen coverings 14 on the other hand, as can be seen from FIGS. 4 and 5.
  • Each tensioning device 42 has a double-angled tensioning bracket 43, the transverse web 44 of which extends inclined upwards in the direction from the top of the respective screen covering 13 or 14 to the side wall 2 or 3.
  • An upper leg 45 extends from the crossbar 44 to the corresponding side 2 or 3 and is supported against this.
  • a lower leg 46 also extends to the corresponding side 2 or 3; but its free end 47 remains at a distance from the side wall 2 or 3.
  • the clamping bracket 43 is on its outside of the respective side wall 2 or 3 substantially facing away with a sliding and sealing coating 48, for example made of a sufficiently flexible plastic with high abrasion resistance, good sliding properties and good sealing effect.
  • This covering 48 has a sealing lip 49 in the area of the upper leg 45, which sealingly rests against the corresponding side 2 or 3 of the machine frame 1.
  • the covering 48 also has a sealing lip 51 protruding toward the sieve space 50 where it rests on the sieve covering 13 or 14.
  • the two sealing lips 49, 51 prevent material and suspension to be screened from reaching the area between the clamping bracket 43 and side wall 2 or 3.
  • a slotted box profile 52 is attached to the crossbar 44 thereof to form an undercut, into which a crossbar 53 of a T-shaped threaded bolt 54, which engages, engages an associated bore 55 engages in the side wall 2 or 3.
  • the tensioning bracket 43 is braced by means of a nut 56 to the side wall 2 or 3 and towards the screen covering 13 or 14, since the threaded bolt 54 extends approximately perpendicularly to the crossbar 44 of the tensioning bracket 43, that is to say it slopes downward from its own crossbar 53.
  • the nut 56 is supported by a spherical cap bearing 57 against the side wall 2 or 3, so that the clamping forces can be introduced evenly over the circumference or edge of the bore 55 in the side wall 2 or 3.
  • a plate spring 58 is arranged between the nut 56 and the spherical cap bearing 57 in order to have sufficient security against loosening of the nut 56 and thus the tensioning device 42 when the sieving machine is vibrating.
  • an upwardly projecting stop bar 38a is formed on the stiffening strip 38, against which the free end 47 of the lower leg 46 is supported.
  • the stiffening strip 38 is supported on the respective side wall 2 or 3 by means of support sections 38b.
  • the lower leg 46 of the tensioning bracket 43 engages in a hook-shaped edge 59 of the cross-tensioning screening covering 14, the free end 47 of the lower leg 46 being at the bottom 60 of the edge 59 abuts.
  • the threaded bolt 54 'serving as a clamping bolt is longer than the threaded bolt 54 in the exemplary embodiment according to FIG. 4, so that there is space for a disk spring package 61 between the spherical cap bearing 57 and the nut 56.
  • the clamping forces acting on the edge 59 of the respective cross-tensioning screen covering 14 and directed towards the side wall 2 or 3 can be kept constant even during the oscillating movements of the screening covering 14 and the associated work of the screening covering.
  • the cross-tension screen covering 14 is tensioned by the plate spring package 61.
  • drip strips 62 can be formed on the canting longitudinal strips 40 and equally on the longitudinal strips 40 ′ and 40 ′′, which have the effect that water does not run along the longitudinal beams 11 to the outlet end 21.
  • longitudinal longitudinal bars 64 extending in the material passage direction 17 are attached, for example with connecting bars, as is shown in FIGS. 3 and 4.
  • the longitudinal tensioning screen covering 63 has at its rear end in the material flow direction 17, in the upper and lower material outlet area 18 and 19, a downwardly bent hook-shaped edge 65, which is suspended via a stop bar 66 correspondingly connected to the machine frame 1.
  • the longitudinal clamping screen covering 63 has an upwardly bent hook-shaped edge 67 into which the lower leg 46 of a clamping device 42 engages, as is shown in detail in FIG. 5.
  • the longitudinal tensioning screen covering becomes 63 stretched towards an end wall 68 on the inlet side.
  • the lateral fastening and sealing, not shown, of the longitudinal tensioning screen covering 63 takes place with the tensioning devices 42 in the manner shown in FIG. 4, to which reference is made.
  • the clamping devices 42 also provide a seal to the end wall 68.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
EP94112804A 1993-09-03 1994-08-17 Appareil cribleur. Withdrawn EP0641608A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4329879 1993-09-03
DE19934329879 DE4329879A1 (de) 1993-09-03 1993-09-03 Siebmaschine

Publications (2)

Publication Number Publication Date
EP0641608A2 true EP0641608A2 (fr) 1995-03-08
EP0641608A3 EP0641608A3 (fr) 1995-12-20

Family

ID=6496815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94112804A Withdrawn EP0641608A3 (fr) 1993-09-03 1994-08-17 Appareil cribleur.

Country Status (2)

Country Link
EP (1) EP0641608A3 (fr)
DE (1) DE4329879A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9931672B2 (en) 2016-04-08 2018-04-03 W.S. Tyler Canada Ltd. Side tensioning system for retaining screen media in a vibrating-type screening machine
CN113385414A (zh) * 2021-07-17 2021-09-14 安徽方园毅智筛分科技有限责任公司 一种涨紧式筛网安装用固定弯铁
US20250058356A1 (en) * 2023-08-15 2025-02-20 Kleemann Gmbh Screen tensioner for tensioning a screen lining
US20250153221A1 (en) * 2023-11-15 2025-05-15 Kleemann Gmbh Screening machine having a screen tray

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007030188A1 (de) * 2007-06-27 2009-01-08 Haver & Boecker Ohg Siebmaschine zum Entwässern
DE102009051946A1 (de) * 2009-11-04 2011-05-05 Ludwig Krieger Draht- Und Kunststofferzeugnisse Gmbh Siebmaschine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922510A (en) * 1956-05-18 1960-01-26 Kolman Mfg Company Screening plant
SE359235C (sv) * 1966-04-15 1976-09-27 Skelleftea Gummifabriks Ab Siktelement
FR2631255B1 (fr) * 1988-05-16 1990-08-24 Szilvasi Peter Cadres amovibles de cribles type cassette ou cartouche

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9931672B2 (en) 2016-04-08 2018-04-03 W.S. Tyler Canada Ltd. Side tensioning system for retaining screen media in a vibrating-type screening machine
US10421102B2 (en) 2016-04-08 2019-09-24 W.S. Tyler Canada Ltd. Side tensioning system for retaining screen media in a vibrating-type screening machine
CN113385414A (zh) * 2021-07-17 2021-09-14 安徽方园毅智筛分科技有限责任公司 一种涨紧式筛网安装用固定弯铁
CN113385414B (zh) * 2021-07-17 2025-06-06 方园(安徽)智能装备有限责任公司 一种涨紧式筛网安装用固定弯铁
US20250058356A1 (en) * 2023-08-15 2025-02-20 Kleemann Gmbh Screen tensioner for tensioning a screen lining
US12605742B2 (en) * 2023-08-15 2026-04-21 Kleemann Gmbh Screen tensioner for tensioning a screen lining
US20250153221A1 (en) * 2023-11-15 2025-05-15 Kleemann Gmbh Screening machine having a screen tray
US12485452B2 (en) * 2023-11-15 2025-12-02 Kleemann Gmbh Screening machine having a screen tray

Also Published As

Publication number Publication date
DE4329879A1 (de) 1995-03-09
EP0641608A3 (fr) 1995-12-20

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