EP1981653A1 - Sieb - Google Patents

Sieb

Info

Publication number
EP1981653A1
EP1981653A1 EP07700128A EP07700128A EP1981653A1 EP 1981653 A1 EP1981653 A1 EP 1981653A1 EP 07700128 A EP07700128 A EP 07700128A EP 07700128 A EP07700128 A EP 07700128A EP 1981653 A1 EP1981653 A1 EP 1981653A1
Authority
EP
European Patent Office
Prior art keywords
sieve
screen
box
diarrhea
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.)
Granted
Application number
EP07700128A
Other languages
English (en)
French (fr)
Other versions
EP1981653B1 (de
Inventor
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 EP1981653A1 publication Critical patent/EP1981653A1/de
Application granted granted Critical
Publication of EP1981653B1 publication Critical patent/EP1981653B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B07B1/28—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
    • 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

Definitions

  • the invention relates to a sieve, in particular a sieve for use in Plansichtem or the like screening and viewing devices for the screening of floury, granular or granular products.
  • Such screens have a sieve box with bottom plate and fines discharge as well as a sieve frame covered with sieve cloth. Like the sieve box, the sieve frame is divided into sections with webs, can be inserted into the sieve box without any connection elements and with a positive fit.
  • Such an insert screen frame has a sufficiently high inherent rigidity so that it is not deformed and does not have to be fixed with fastening elements on the screen box.
  • the screen frame is preferably made of metallic materials and covered with screen mesh.
  • the product-carrying surfaces of the sieve box are preferably coated with plastic, the bottom plate is made of metal or plastic.
  • the invention has for its object to develop a screen that allows a better performance adjustment to the product flow in the classifier, in particular Plansichter and is particularly suitable for very high performance.
  • the solution of the task The sieve box has at least one diarrhea, the width of which is much higher than usual (usually about 6 cm), preferably at least 1.5 times as wide. For example, a width of about 13 cm.
  • two large outlet channels are preferably provided, which are arranged parallel to each other on the outer sides of the screen box.
  • Sieves with such large diarrhea channels for the overflow are particularly for Kontrollsichtungen at high powers, eg. B. of up to 40 t / h per Siebabteil applicable. At the same time they allow better air circulation in the plan sifter.
  • the outer dimensions (base area) of the screen are preferably identical in all embodiments.
  • the sieve boxes are preferably filled with foam and provided with insertion sieves whose frames are made of metal, preferably of stainless steel, based on the disclosure according to EP-B-584302.
  • the outlet box preferably has a modular construction, which, with a small number of molded parts, enables a high variety of outlet variants, also with regard to the number of product runs.
  • Fig. 2 the bottom view of a foamed screen box.
  • a foamed from PUR sieve box 1 a sieve has a bottom plate 2 and partitions 4 for receiving a Einlegesiebrahmens 5 with webs and continue discharge channels and is bounded by side walls 3.
  • the frame height of the screen box 1 is about 8 cm.
  • the screen box 1 also has specifically designed corner pieces 7, on the one hand enable a good centering within outer side walls 3 and on the other hand large outlet channels and diarrhea channels 6.
  • the width of these diarrhea channels 6 is about 13 cm, which allows a visual performance of about 35 t / h.
  • the foamed screen box 1 has no sharp corners and edges, which simplifies cleaning. The wear is low.
  • the insert screen frame 5 made of stainless steel is provided with a contour-matched seal, which ensures optimum tightness between insert screen frame 5 and screen box 1.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

Sieb
Die Erfindung betrifft ein Sieb, insbesondere ein Sieb zur Anwendung in Plansichtem oder dergleichen Sieb- und Sichteinrichtungen zur Sichtung von mehligen, granulären oder körnigen Produkten.
In der EP-B-584302 sind Vorrichtungen für Plansichter, insbesondere auch Siebe und Siebrahmen offenbart. Solche Siebe weisen einen Siebkasten mit Bodenplatte und Feingutaustrag sowie einen mit Siebgewebe bespannten Siebrahmen auf. Der Siebrahmen ist, wie auch der Siebkasten mit Stegen in Felder unterteilt, ist verbindungsele- mentefrei und formschlüssig in den Siebkasten einlegbar. Ein solcher Einlegesiebrah- men weist eine ausreichend hohe Eigensteifigkeit auf, so dass er nicht verformt wird und nicht mit Befestigungselementen auf dem Siebkasten fixiert werden muss. Der Siebrahmen wird bevorzugt aus metallischen Werkstoffen hergestellt und mit Siebgewebe bespannt. Die produktführenden Flächen des Siebkastens sind bevorzugt mit Kunststoff beschichtet, die Bodenplatte besteht aus Metall oder Kunststoff.
Es ist auch bekannt, Siebrahmen aus Kunststoffen herstellen und zur Versteifung ein Metallskelett vorzusehen. Das Siebgewebe kann durch Umschäumen mit dem Siebrahmen verbunden werden.
Femer ist es nach der DE-A-10105647 bekannt, solche Siebkästen aus einem Kunststoff auszuschäumen. Hierbei kann für einen Steg noch ein Einleger in der Schäumform vorgesehen sein, der während des Ausschäumens schwimmend gelagert ist und beim abkühlen frei schrumpfen kann.
Der Erfindung liegt die Aufgabe zugrunde, ein Sieb zu entwickeln, das eine bessere Leistungsanpassung an den Produktfluss im Sichter, insbesondere Plansichter ermöglicht und insbesondere für sehr hohe Leistungen geeignet ist. Die Lösung der Aufgabe erfolgt mit den Merkmalen des Patentanspruchs 1. Der Siebkasten weist mindestens einen Durchfallkanal auf, dessen Breite wesentlich höher als üblich (üblich sind ca. 6 cm) ist, bevorzugt mindestens 1 ,5fach so breit. Zum Beispiel eine Breite von ca. 13 cm.
Vorteilhafte Ausgestaltungen sind in den Unteransprüchen offenbart. So sind bevorzugt zwei grosse Auslaufkanäle vorgesehen, die parallel zueinander an den Aussenseiten des Siebkastens angeordnet sind. Siebe mit derart grossen Durchfallkanälen für den Überlauf sind besonders für Kontrollsichtungen bei hohen Leistungen, z. B. von bis zu 40 t/h je Siebabteil anwendbar. Sie ermöglichen zugleich eine bessere Luftzirkulation im Plansichter.
Die Aussenabmessungen (Grundfläche) des Siebes sind bei allen Ausführungsformen vorzugsweise gleich.
In weiterer Ausgestaltung sind die Siebkästen vorzugsweise ausgeschäumt und mit Einlegesieben versehen, deren Rahmen aus Metall bestehen, vorzugsweise aus rostfreiem Stahl, in Anlehnung an die Offenbarung gemäss EP-B-584302.
Der Auslaufkasten weist bevorzugt einen modularen Aufbau auf, was bei geringer Anzahl von Formteilen eine hohe Vielfalt an Auslaufvarianten ermöglicht, auch bzgl. der Anzahl der Produktläufe.
Die Erfindung wird nachfolgend in einem Ausführungsbeispiel anhand einer Zeichnung näher beschrieben. In der Zeichnung zeigen die
Fig. 1 : einen Siebkasten in Draufsicht,
Fig. 2: die Unteransicht eines geschäumten Siebkastens.
Ein aus PUR geschäumter Siebkasten 1 eines Siebes weist eine Bodenplatte 2 sowie Zwischenwände 4 zur Aufnahme eines Einlegesiebrahmens 5 mit Stegen und weiterhin Auslaufkanäle auf und ist von Seitenwänden 3 begrenzt. Die Rahmenhöhe des Siebkastens 1 beträgt ca. 8 cm. Der Siebkasten 1 weist zudem spezifisch ausgebildete Eckstücke 7 auf, die einerseits ein gutes zentrieren innerhalb äusserer Seitenwände 3 und andererseits grosse Auslaufkanäle und Durchfallkanäle 6 ermöglichen.
Vorgesehen sind zwei breite Durchfallkanäle 6, die zwischen Siebrahmen 5 und Aus- senwand des Siebkastens 1 angeordnet sind. Die Breite dieser Durchfallkanäle 6 beträgt ca. 13 cm, was eine Sichtleistung von ca. 35 t/h ermöglicht.
Der geschäumte Siebkasten 1 weist keine scharfen Ecken und Kanten auf, was die Reinigung vereinfacht. Der Verschleiss ist gering.
Der Einlegesiebrahmen 5 aus rostfreiem Stahl ist mit einer konturangepassten Dichtung versehen, was eine optimale Dichtheit zwischen Einlegesiebrahmen 5 und Siebkasten 1 gewährleistet.

Claims

Patentansprüche
1. Sieb, insbesondere ein Sieb zur Anwendung in Plansichtem oder dergleichen Sieb- und Sichteinrichtungen zur Sichtung von mehligen, granulären oder körnigen Produkten, bestehend aus einem Siebkasten mit Bodenplatte und mindestens einem Durchfallkanal für Produkt sowie einem Einlegesiebrahmen, der mit einem Siebgewebe bespannt ist, dadurch gekennzeichnet, dass der mindestens eine Durchfallkanal (6) eine Breite aufweist, die das mindestens 1 ,5fache üblicher Siebe beträgt.
2. Sieb nach Anspruch 1 , dadurch gekennzeichnet, dass der Durchfallkanal (6) etwa doppelt so breit wie üblich ist.
3. Sieb nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zwei Durchfallkanäle (6) vorgesehen sind.
4. Sieb nach mindestens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Siebkasten (1) aus einem Kunststoff besteht, insbesondere aus einem schäumbaren Kunststoff.
5. Sieb nach mindestens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Einlegesiebrahmen (5) aus Metall, insbesondere aus einem rostfreien Stahl besteht.
6. Sieb nach Anspruch 1 oder 5, dadurch gekennzeichnet, dass der Siebkasten (1) Eckstücke (7) aufweist.
EP07700128A 2006-02-08 2007-01-26 Sieb Active EP1981653B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006005967A DE102006005967A1 (de) 2006-02-08 2006-02-08 Sieb
PCT/CH2007/000035 WO2007090304A1 (de) 2006-02-08 2007-01-26 Sieb

Publications (2)

Publication Number Publication Date
EP1981653A1 true EP1981653A1 (de) 2008-10-22
EP1981653B1 EP1981653B1 (de) 2011-10-19

Family

ID=38282277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07700128A Active EP1981653B1 (de) 2006-02-08 2007-01-26 Sieb

Country Status (12)

Country Link
US (1) US20090084712A1 (de)
EP (1) EP1981653B1 (de)
JP (1) JP2009525852A (de)
KR (1) KR20080098483A (de)
CN (1) CN101378848B (de)
AT (1) ATE529197T1 (de)
AU (1) AU2007214235B2 (de)
BR (1) BRPI0707707A2 (de)
DE (1) DE102006005967A1 (de)
ES (1) ES2373332T3 (de)
WO (1) WO2007090304A1 (de)
ZA (1) ZA200806151B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20110094A1 (it) * 2011-03-28 2012-09-29 Omas Srl Telaio porta setacci
CH720205A1 (de) * 2022-11-07 2024-05-15 Swisca Ag Siebvorrichtung für Plansichter zum Fraktionieren von Getreidemahlprodukten

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455383A (en) * 1947-09-16 1948-12-07 Richmond Mfg Company Screen for gyratory sifters, screens, or bolting equipment
US3422955A (en) * 1966-04-11 1969-01-21 Smico Inc Superimposed gyratory sifters
CH625430A5 (en) * 1977-11-22 1981-09-30 Budapesti Elelmiszeripari Gepg Basic frame for screening boxes
DE4101710A1 (de) * 1991-01-22 1992-07-23 Hein Lehmann Trenn Foerder Siebflaeche fuer eine siebmaschine
CH685604A5 (de) * 1992-02-29 1995-08-31 Buehler Ag Plansichter.
JP3316032B2 (ja) * 1993-05-11 2002-08-19 日清製粉株式会社 粉粒体篩機用の篩枠
JP3479565B2 (ja) * 1994-10-28 2003-12-15 日清製粉株式会社 粉粒体篩装置に用いる多段積層式用の篩枠
US5598931A (en) * 1994-10-11 1997-02-04 Nisshin Flour Milling Co., Ltd. Sifter frame for powder particle sifter
DE19706601C1 (de) * 1997-02-20 1998-11-12 Buehler Ag Siebrahmen für Plansichter und Verfahren zu dessen Herstellung
DE19825617A1 (de) * 1998-06-08 1999-12-09 Filip Gmbh Muellereibuersten Vorrichtung zur Siebrahmen- und Bodenreinigung eines Siebkastens
JP4176226B2 (ja) * 1999-02-25 2008-11-05 日清製粉株式会社 粉粒体の篩い分け方法
DE102007004150A1 (de) * 2007-01-22 2008-07-24 Bühler AG Plansichter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007090304A1 *

Also Published As

Publication number Publication date
AU2007214235A1 (en) 2007-08-16
KR20080098483A (ko) 2008-11-10
CN101378848B (zh) 2013-02-13
WO2007090304A1 (de) 2007-08-16
EP1981653B1 (de) 2011-10-19
AU2007214235B2 (en) 2011-04-21
JP2009525852A (ja) 2009-07-16
US20090084712A1 (en) 2009-04-02
ATE529197T1 (de) 2011-11-15
DE102006005967A1 (de) 2007-08-09
CN101378848A (zh) 2009-03-04
ES2373332T3 (es) 2012-02-02
BRPI0707707A2 (pt) 2011-05-10
ZA200806151B (en) 2009-04-29

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