EP1224984A2 - Sieve - Google Patents

Sieve Download PDF

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Publication number
EP1224984A2
EP1224984A2 EP01126559A EP01126559A EP1224984A2 EP 1224984 A2 EP1224984 A2 EP 1224984A2 EP 01126559 A EP01126559 A EP 01126559A EP 01126559 A EP01126559 A EP 01126559A EP 1224984 A2 EP1224984 A2 EP 1224984A2
Authority
EP
European Patent Office
Prior art keywords
sieve
box
screen
plansifter
corners
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
EP01126559A
Other languages
German (de)
French (fr)
Other versions
EP1224984A3 (en
EP1224984B1 (en
Inventor
Marc Bachmann
Jürgen Moosmann
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.)
Buehler AG
Original Assignee
Buehler AG
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 Buehler AG filed Critical Buehler AG
Publication of EP1224984A2 publication Critical patent/EP1224984A2/en
Publication of EP1224984A3 publication Critical patent/EP1224984A3/en
Application granted granted Critical
Publication of EP1224984B1 publication Critical patent/EP1224984B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B07B1/38—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens oscillating in a circular arc in their own plane; Plansifters
    • 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
    • B07B2201/02—Fastening means for fastening screens to their frames which do not stretch or sag the screening surfaces

Definitions

  • Another task is to develop a plansifter that is simple and safe horizontal tensioning or relaxation of screens and / or screen stacks allows.
  • An automatic clamping device for stacks of sieves is also made possible in a plan sifter, which is also a start-up control and an automatic, horizontal, controlled retensioning includes.
  • a sieve has a sieve frame 1 with web strips 2 and a sieve fabric 3, the is placed in a sieve box 4.
  • the screen frame is preferably made of aluminum or a PUR foam.
  • the base plate 5 has web strips 6 and also preferably 2 web strips on its outside on, which are designed so that they, on a screen 3 below arranged sieve can be immersed in the ground material layer. In addition to one Stiffening of the base plate 5 cause such outer web strips also lead the ground material on the sieve below it in a plan sifter.
  • the screens arranged in a plansifter 10 in stacks are in the horizontal direction tense or tense.
  • Such sieve stacks are arranged e.g. after in EP-B-584 302.
  • the vertical bracing takes place e.g. by means of a clamping means 11, which is below a ceiling frame 13 is arranged.
  • the drive station is preferably completely within a central part of a plan sifter compartment arranged.
  • the sieves or sieve stacks are horizontal with a defined force braced.
  • an adjustable force is created in two side edges of a sieve initiated so that the sieve with the opposite side wall or the opposite Side edges are pressed against the frame of the plan sifter 10.
  • the adjustable force enables safe clamping while taking into account the respective Operating conditions etc.
  • the force is introduced via an element 15, which divides the force into a component along the direction of force application and angled approximately in the direction of the middle of the screen to the direction of force transmission enables.
  • the corners must also be used for this the sieves have surfaces 7 that correspond to a corresponding surface 17 of the element 15 correspond.
  • the element 15 is therefore preferably designed as an isosceles triangle and is arranged on a longitudinal member 14 with a spring 16. A flexible one System of the sieve box 4 is thus guaranteed in the sieve stack.
  • the opposite corners of the sieve box 4 preferably have analog surfaces 7 on, so that in a system against a spring element a comparable force distribution he follows.
  • the four corners of a sieve box 4 can thus be fixed in a horizontal position. Both too small (insufficient) and too intense (deforming) This prevents tensioning, regardless of the operating conditions (Temperature etc.)

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Supports For Plants (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Catching Or Destruction (AREA)

Abstract

The screen sifter comprises a screen box (4) with base plate and with at least two corners of the box having a flat surface area (7). The screen can be horizontally tensioned by tensioning elements (15) of triangular cross-section with one surface adjoining a corresponding flat surface area of one corner.

Description

Die Erfindung betrifft ein Sieb, insbesondere ein Sieb bzw. einen Siebkasten für Plansichter nach dem Oberbegriff des Anspruchs 1, sowie einen Plansichter.The invention relates to a sieve, in particular a sieve or a sieve box for plan sifters according to the preamble of claim 1, and a plansifter.

Gattungsgemässe Siebe, insbesondere für Plansichter und dergleichen weisen einen Siebkasten mit einer Bodenplatte auf, in bzw. auf welchen ein mit Siebgewebe bespannter Siebrahmen ein- bzw. aufgelegt wird (EP-A-330846 oder WO-A-93/16815). Derartige Siebe kommen bereits ohne Wellgitter oder Tragroste aus. Die Siebrahmen können aus Leichtmetall oder auch einem Metall-Holzverbund und auch die Bodenplatte kann aus Metall oder Kunststoff bestehen (EP-A-584302).Generic screens, in particular for plansifters and the like, have one Sieve box with a base plate on, in or on which a screen fabric is covered Sieve frame is inserted or placed on (EP-A-330846 or WO-A-93/16815). Such screens already do without corrugated grids or support gratings. The sieve frames can be made of light metal or a metal-wood composite and also the base plate can be made of metal or plastic (EP-A-584302).

Nach der EP-B-536803 sind Siebrahmen bekannt, die im Siebstapel an ihren Ecken durch vertikal verlaufende, im Querschnitt dreieckige fest angeordnete Leisten gehalten werden, die wiederum im zylindrischen Gehäuse eines Plansichters angeordnet sind.According to EP-B-536803 sieve frames are known which are in the sieve stack at their corners held by vertically running, triangular cross-section strips are, which in turn are arranged in the cylindrical housing of a plan sifter.

Die Aufgabe der Erfindung besteht nun darin, ein Sieb zu entwickeln, das einzeln oder im Siebstapel horizontal einfach verspannbar ist. Die Lösung der Aufgabe erfolgt anhand der kennzeichnenden Merkmale des Anspruchs 1.The object of the invention is now to develop a screen that individually or can be easily clamped horizontally in the sieve stack. The task is solved on the basis of the characterizing features of claim 1.

Eine weitere Aufgabe besteht in der Entwicklung eines Plansichters, der ein einfaches und sicheres horizontales Spannen bzw. Entspannen von Sieben und/oder Siebstapeln ermöglicht.Another task is to develop a plansifter that is simple and safe horizontal tensioning or relaxation of screens and / or screen stacks allows.

Eine Lageänderung der Siebe im Betrieb des Plansichters wird unterbunden, Toleranzen von Siebrahmen sind besser ausgleichbar.A change in the position of the screens in the operation of the plan sifter is prevented, tolerances sieve frames are easier to compensate.

Anstelle von individuellen Spanneinrichtungen für ein einzelnes Sieb oder in Kombination hiermit, können auch Gruppen von Sieben oder der ganze Siebstapel mit nur einer Spanneinrichtung gespannt werden. Instead of individual clamping devices for a single screen or in combination Hereby, groups of seven or the whole stack of sieves can be made with just one Clamping device to be clamped.

Ermöglicht wird dabei auch eine automatische Spannvorrichtung für Stapel von Sieben in einem Plansichter, die zugleich eine Anlaufkontrolle sowie ein automatisches, horizontales, kontrolliertes Nachspannen beinhaltet.An automatic clamping device for stacks of sieves is also made possible in a plan sifter, which is also a start-up control and an automatic, horizontal, controlled retensioning includes.

Ebenso ist ein schneller Wechsel auf ein konventionelles, mechanisches Spannen der Siebstapel möglich. Hierbei wird mittels mindestens eines Stellmotors oder dergleichen mit variablem Hub, gegen mindestens ein Sieb des Stapels gefahren und somit wird der Siebstapel in horizontaler Richtung verspannt bis zu einer maximalen, definierten Kraft.There is also a quick change to conventional, mechanical clamping Sieve stack possible. Here, by means of at least one servomotor or the like with variable stroke, driven against at least one sieve of the stack and thus the Sieve stack clamped in the horizontal direction up to a maximum, defined force.

Die Erfindung wird nachfolgend in einem Ausführungsbeispiel an Hand einer Zeichnung näher beschrieben. In der Zeichnung zeigen die

Fig. 1:
ein vollständiges Sieb
Fig. 2:
eine Teilansicht Plansichter
Fig. 3:
eine Teilansicht eines Siebes im Plansichter
The invention is described in more detail in an exemplary embodiment with reference to a drawing. In the drawing they show
Fig. 1:
a full sieve
Fig. 2:
a partial view plansifter
Fig. 3:
a partial view of a sieve in the plansifter

Ein Sieb weist einen Siebrahmen 1 mit Stegleisten 2 und einem Siebgewebe 3 auf, der in einen Siebkasten 4 eingelegt wird. Der Siebrahmen besteht bevorzugt aus Aluminium oder einem PUR-Schaumstoff.A sieve has a sieve frame 1 with web strips 2 and a sieve fabric 3, the is placed in a sieve box 4. The screen frame is preferably made of aluminum or a PUR foam.

Die Bodenplatte 5 weist Stegleisten 6 und auch auf ihrer Aussenseite bevorzugt 2 Stegleisten auf, die so ausgebildet sind, dass sie in die, auf einem Siebgewebe 3 eines darunter angeordneten Siebes befindliche Mahlgutschicht eintauchen können. Neben einer Versteifung der Bodenplatte 5 bewirken solche äusseren Stegleisten auch ein führen des Mahlgutes auf dem jeweils darunter liegenden Sieb in einem Plansichter.The base plate 5 has web strips 6 and also preferably 2 web strips on its outside on, which are designed so that they, on a screen 3 below arranged sieve can be immersed in the ground material layer. In addition to one Stiffening of the base plate 5 cause such outer web strips also lead the ground material on the sieve below it in a plan sifter.

Die in einem Plansichter 10 in Stapeln angeordneten Siebe sind in horizontaler Richtung verspannt bzw. spannbar. Die Anordnung solcher Siebstapel erfolgt z.B. nach der in EP-B-584 302 beschriebenen Weise.The screens arranged in a plansifter 10 in stacks are in the horizontal direction tense or tense. Such sieve stacks are arranged e.g. after in EP-B-584 302.

Die vertikale Verspannung erfolgt z.B. mittels eines Spannmittels 11, welches unterhalb eines Deckenrahmens 13 angeordnet ist. The vertical bracing takes place e.g. by means of a clamping means 11, which is below a ceiling frame 13 is arranged.

Die Antriebsstation ist bevorzugt vollständig innerhalb eines Mittelteiles eines Plansichterabteiles angeordnet.The drive station is preferably completely within a central part of a plan sifter compartment arranged.

Im weiteren sind die Siebe bzw. Siebstapel horizontal mit einer definierten Kraft verspannbar. Hierbei wird eine einstellbare Kraft in je zwei Seitenkanten eines Siebes eingeleitet, so dass das Sieb mit der gegenüberliegenden Seitenwand bzw. den gegenüberliegenden Seitenkanten gegen den Rahmen des Plansichters 10 gedrückt wird. Die einstellbare Kraft ermöglicht ein sicheres Spannen unter Beachtung der jeweiligen Betriebsbedingungen etc.Furthermore, the sieves or sieve stacks are horizontal with a defined force braced. Here, an adjustable force is created in two side edges of a sieve initiated so that the sieve with the opposite side wall or the opposite Side edges are pressed against the frame of the plan sifter 10. The adjustable force enables safe clamping while taking into account the respective Operating conditions etc.

Die Kraft wird über je ein Element 15 eingeleitet, welches eine Aufteilung der Kraft in eine Komponente längs zur Krafteinleitungsrichtung und winklig etwa in Richtung auf die Siebmitte zur Krafteinleitungsrichtung ermöglicht. Hierzu müssen auch die Ecken der Siebe Flächen 7 aufweisen, die einer entsprechenden Fläche 17 des Elementes 15 entsprechen. Das Element 15 ist daher bevorzugt als gleichschenkliges Dreieck ausgebildet und ist mit einer Feder 16 jeweils an einem Längsträger 14 angeordnet. Eine flexible Anlage des Siebkastens 4 ist damit im Siebstapel gewährleistet.The force is introduced via an element 15, which divides the force into a component along the direction of force application and angled approximately in the direction of the middle of the screen to the direction of force transmission enables. The corners must also be used for this the sieves have surfaces 7 that correspond to a corresponding surface 17 of the element 15 correspond. The element 15 is therefore preferably designed as an isosceles triangle and is arranged on a longitudinal member 14 with a spring 16. A flexible one System of the sieve box 4 is thus guaranteed in the sieve stack.

Die gegenüberliegenden Ecken des Siebkastens 4 weisen bevorzugt analoge Flächen 7 auf, so dass bei einer Anlage gegen ein Federelement eine vergleichbare Kraftaufteilung erfolgt. Die vier Ecken eines Siebkastens 4 sind damit in horizontaler Lage fixierbar. Sowohl ein zu geringes (unzureichendes) als ein zu intensives (deformierendes) Spannen wird dadurch verhindert, unabhängig von den Betriebsbedingungen (Temperatur u.a.)The opposite corners of the sieve box 4 preferably have analog surfaces 7 on, so that in a system against a spring element a comparable force distribution he follows. The four corners of a sieve box 4 can thus be fixed in a horizontal position. Both too small (insufficient) and too intense (deforming) This prevents tensioning, regardless of the operating conditions (Temperature etc.)

Die Siebe stehen in den Ecken genau übereinander, so dass auch untereinander eine Dichtheit gegeben ist. The sieves are exactly one above the other in the corners, so that there is one underneath them Tightness is given.

Kurzzeichenabbreviations

11
Siebrahmenscreen frame
22
Stegleisteweb strip
33
Siebgewebemesh
44
Siebkastenscreenbox
55
Bodenplattebaseplate
66
Stegleisteweb strip
77
Flächearea
1010
PlansichterPlansichter
1111
Spannmittelclamping means
1313
Deckenrahmenceiling frame
1414
Längsträgerlongitudinal beams
1515
Elementelement
1616
Federfeather
1717
Flächearea

Claims (5)

Sieb, aufweisend einen Siebkasten (4) mit einer Bodenplatte (5) und einen Siebrahmen (1), dadurch gekennzeichnet, dass mindestens zwei Ecken des Siebkastens (4) eine Fläche (7) aufweisen.Sieve, comprising a sieve box (4) with a base plate (5) and a sieve frame (1), characterized in that at least two corners of the sieve box (4) have a surface (7). Sieb nach Anspruch 1, dadurch gekennzeichnet, dass zwei sich jeweils gegenüber liegende Flächen (7) parallel zueinander angeordnet sind.Screen according to claim 1, characterized in that two opposing surfaces (7) are arranged parallel to each other. Plansichter, aufweisend Siebabteile zu Aufnahme von Siebstapeln, dadurch gekennzeichnet, dass Spannmittel zur horizontalen Spannung eines Siebes bzw. eines ganzen Siebstapels vorgesehen sind.Plansifter, comprising sieve compartments for receiving sieve stacks, characterized in that clamping means are provided for the horizontal tensioning of a sieve or an entire sieve stack. Plansichter nach Anspruch 3, dadurch gekennzeichnet, dass die Spannmittel Elemente (15), bevorzugt mit dreieckigem Querschnitt, enthalten, wobei deren eine Fläche (17) an einer entsprechenden Fläche (7) einer Ecke des Siebkastens (4) flächig anliegt und wobei jeweils mindestens zwei Ecken eines Siebkastens (4) an Flächen (17) anliegen.Plansifter according to claim 3, characterized in that the clamping means contain elements (15), preferably with a triangular cross-section, one surface (17) of which rests flatly on a corresponding surface (7) of a corner of the screen box (4) and at least in each case two corners of a sieve box (4) lie against surfaces (17). Plansichter nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass zwei sich jeweils gegenüberliegende Flächen (7) eines Siebkastens (4) parallel zueinander angeordnet sind.Plansifter according to claim 3 or 4, characterized in that two opposite surfaces (7) of a screen box (4) are arranged parallel to each other.
EP01126559A 2001-01-19 2001-11-15 Sieve and plansifter Expired - Lifetime EP1224984B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10105647A DE10105647A1 (en) 2001-01-19 2001-01-19 Sieve and method for producing sieves
DE10105647 2001-01-19

Publications (3)

Publication Number Publication Date
EP1224984A2 true EP1224984A2 (en) 2002-07-24
EP1224984A3 EP1224984A3 (en) 2002-11-27
EP1224984B1 EP1224984B1 (en) 2006-12-06

Family

ID=7673237

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01126559A Expired - Lifetime EP1224984B1 (en) 2001-01-19 2001-11-15 Sieve and plansifter

Country Status (3)

Country Link
EP (1) EP1224984B1 (en)
AT (1) ATE347453T1 (en)
DE (2) DE10105647A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015126335A1 (en) * 2014-02-18 2015-08-27 Sedat Kunduraci A modular sieving box
CN109070139A (en) * 2016-05-03 2018-12-21 M-I有限公司 For fastening the equipment, system and method for sieve on rotary flat screen

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006005969B4 (en) * 2006-02-08 2013-11-21 Bühler AG scree
DE102006005971B4 (en) * 2006-02-08 2011-04-07 Bühler AG Plansichter
DE102007041444A1 (en) 2007-08-31 2009-03-05 Bühler AG Filter for use in e.g. plan sifter, has filter box with base plate and drop-through channel for product, and inserting filter frame covered with filter screen, where drop-through channel exhibits specific width
DE102007042838A1 (en) 2007-09-10 2009-03-12 Bühler AG scree
CN102485351A (en) * 2010-12-03 2012-06-06 河南太行振动机械股份有限公司 Floating-type sieve plate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE228064C (en) *
DE2755573A1 (en) * 1977-12-09 1979-06-13 Gabona Troeszt Kutatointezete Foundation frame for multipurpose sieves - has main axes including acute angle with sides of adjoining work-surface (HU 28.2.78)
EP0330846A2 (en) * 1988-01-30 1989-09-06 Reinhard Rüter Plansifter
WO1993016815A1 (en) * 1992-02-29 1993-09-02 Bühler AG Device for plansifter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE228064C (en) *
DE2755573A1 (en) * 1977-12-09 1979-06-13 Gabona Troeszt Kutatointezete Foundation frame for multipurpose sieves - has main axes including acute angle with sides of adjoining work-surface (HU 28.2.78)
EP0330846A2 (en) * 1988-01-30 1989-09-06 Reinhard Rüter Plansifter
WO1993016815A1 (en) * 1992-02-29 1993-09-02 Bühler AG Device for plansifter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015126335A1 (en) * 2014-02-18 2015-08-27 Sedat Kunduraci A modular sieving box
CN109070139A (en) * 2016-05-03 2018-12-21 M-I有限公司 For fastening the equipment, system and method for sieve on rotary flat screen
US11285514B2 (en) 2016-05-03 2022-03-29 Schlumberger Technology Corporation Apparatus, system and method for fastening a screen on a gyratory sifter

Also Published As

Publication number Publication date
DE50111585D1 (en) 2007-01-18
DE10105647A1 (en) 2002-07-25
EP1224984A3 (en) 2002-11-27
ATE347453T1 (en) 2006-12-15
EP1224984B1 (en) 2006-12-06

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