EP0921865A1 - Flat sifter - Google Patents

Flat sifter

Info

Publication number
EP0921865A1
EP0921865A1 EP97922804A EP97922804A EP0921865A1 EP 0921865 A1 EP0921865 A1 EP 0921865A1 EP 97922804 A EP97922804 A EP 97922804A EP 97922804 A EP97922804 A EP 97922804A EP 0921865 A1 EP0921865 A1 EP 0921865A1
Authority
EP
European Patent Office
Prior art keywords
sieve
stacks
plansifter
compartments
stack
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
EP97922804A
Other languages
German (de)
French (fr)
Other versions
EP0921865B1 (en
Inventor
Marc-Leon Deillon
Christoph Keller
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 EP0921865A1 publication Critical patent/EP0921865A1/en
Application granted granted Critical
Publication of EP0921865B1 publication Critical patent/EP0921865B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B07B1/46—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

Definitions

  • the invention relates to a plan sifter, in particular a square plan sifter and its structure with respect to the load-bearing elements.
  • Such plansifters are used in particular for the screening of grist, semolina and / or flour-like products in the mill process technology, as well as for the sorting of various vegetable grains such as. B. wheat, rye or corn or generally for the separation of grain by different grain sizes.
  • Plansifters especially large and square plansifters, are part of the current state of the art, e.g. B. for separating or sieving / classifying or classifying grain products
  • a square plan sifter is known from WO 93/16815, which has a swing action which forces the plan sifter and all sieves to perform a circular movement, the plan sifter as a whole being suspended from bars in the usual way as a cantilever.
  • the frame of such a plan sifter is designed as a supporting housing, which receives and laterally supports the sieve stack, with a housing base which forms a support base for the sieve stack and on its upward-facing rare walls.
  • a plan sifter according to DE -PS 2256307 vertical clamping stacking devices whereby the forces of the vibration exciter are transmitted via vibration-stable ceiling and floor elements of rigid stacking frames.
  • the stacking frames are each characterized by two vertical elements, each of which is arranged in a plane containing the center of gravity of the stack, to the longitudinal plane perpendicular to the longitudinal plane through the stack and the vibration exciter, and which are rigidly connected to the ceiling and floor elements of the stacking frames.
  • the vertical elements form the vertical Edges of a parallelepiped-shaped vibrating frame, the vibrating bearings of the plan sifter being arranged on these vertical elements
  • the object of the invention is to design a generic plan sifter in such a way that its manufacture of the supporting structure is noticeably simplified by further developed modular construction. Furthermore, within the limits set by vibration technology, the dead weight is also to be reduced and sanitation and accessibility are to be improved This object is achieved on the basis of the features of the characterizing part of claim 1
  • the fact that the flow of forces can be realized via the supporting structure opens up further possibilities for modularization. The flow of forces is softer overall and a larger proportion of the flow of forces can be passed over the sieve stack in a function-enhancing manner.
  • Such a supporting structure is apparently comparable only with the basic elements base, vertical support and cover with the prior art according to DE-PS 2256307, but not in the detailed version, since it is not covered by the fundamental principles of vibration engineering. In particular, the manufacture and assembly of the parts of the supporting structure is simplified.
  • the plan sifter according to the invention consists of several double compartments in their supporting structure, which are laterally connected to each other and at the ends with Help be hung by
  • the double compartments consist of a lid and a base, which are connected by vertical profiles and which form side compartments (each) with two compartments (sieve compartment). This eliminates or a separate frame structure for the bottom and lid can be omitted
  • the side parts are positively and non-positively fastened, whereby the positive locking ensures tightness and thus sanitation.
  • Cold insulation or hot bridging is avoided by further insulation.
  • An air duct in the vertical profiles can cause the profile surface to heat up by flowing hot air through it, thereby Condensation is avoided. Such an option can be particularly useful for delicate products.
  • the hot air flow can be provided by separation from the product flow or separately
  • the sieve stacks can then be inserted and clamped, preferably in a form-fitting manner, into the supporting structure.
  • the sieve stacks can be braced both conventionally and in a further embodiment of the invention using pneumatic means.
  • An elastic, inflatable element is arranged in the space between the sieve stack and cover , which, when filled with air, ensures a defined, constant vertical tensioning and has the same sound-absorbing effect.
  • bracing from the inside is easier and more space-saving.
  • the outer side parts and also the doors consist of sandwich constructions or foamed elements, such sandwich elements being known as such, but not such an application.
  • the doors are preferably positively and non-positively inserted and braced between two vertical profiles and are easy to use.
  • Fig. 1 an exploded view of a plan sifter
  • Fig. 2 shows a double compartment
  • Fig. 3 is a sectional view of a compartment and a door
  • the drive unit represents an unbalance drive with an oscillating motor in order to set the double compartments and thus the stacked sieves in an oscillating movement via the drive, which is common with such plan sifters.
  • the plan sifter contains, as a square plan sifter, 5x2 sieve stacks (9) in this exemplary embodiment, analogous arrangements being possible from 1x2 sieve stacks (9) upwards.
  • the load-bearing structure consists of five double compartments connected laterally to one another and four vertical supports 3 attached to the transverse sides.
  • the double compartments themselves consist of a base 1 and a cover 2, which are connected by vertical profiles 5 and two compartments 4 with side panels 6 form.
  • the drive unit is arranged in each case in the space between the double compartments, taking into account the number of double compartments.
  • the side parts 6 with a foam sandwich construction are fitted into recesses 7 in the vertical profiles 5.
  • recesses 8 of the vertical profiles 5 are in sieve stacks 9 arranged sieves inserted and braced A complete horizontal bracing of the sieve stack 9 is ensured by the inserted doors 10, which consist of side parts 6, which are contained in door profiles 15.
  • the side parts 6 consist of metallic cover plates 12 (preferably aluminum) and an intermediate layer made of foam 13. Insulations (polymer insert) 14 in the vertical profiles 5 serve as cold bridges.
  • the side parts 6 are only inserted into the recesses 7 and tensioned and glued with the aid of teachings.
  • the continuous cavities in the vertical profiles 5 optionally serve as an additional air duct for warm air and prevent condensation.
  • the vertical profiles 5 themselves can consist of aluminum profiles as is customary in the trade
  • the frame of the door 10 is formed analogously to the formation of the vertical profiles 5, and the aforementioned also applies with regard to the connection to the door leaf (analog side part 6)
  • the vertical profiles 5 themselves are connected to the base 1 and the cover 2 by screw connections, so that the required shape and strength is given and the power flow takes place as mentioned above.
  • Base 1 and cover 2 are laser-cut and bent to give a shape before coating Cover elements (not shown) can be attached to the outer corner parts of the vertical profiles 5 in order to achieve flush, smooth outer contours of the plan sifter. The same applies to the upper and lower side edges.
  • the side parts 6 can already be coated with the required paint or the like, so that further treatment before, during or after assembly can be omitted.
  • a tubular element (not shown) arranged essentially on the sieve frame which, when filled with air or the like. Gases a defined, vertical bracing of the sieve stack 9 is made possible. There is a uniform clamping force that is measurable, which also increases operational safety.
  • a vibration exciter can be arranged according to DE-PS 2256307; the screening process will also be carried out analogously.
  • the drive is preferably preassembled as a subassembly and is mounted separately, which makes it possible to transport a plan sifter in subassemblies and to complete it comparatively easily on site.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Eye Examination Apparatus (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

A flat sifter with self-supporting structure which is preferably used for sifting grain and flour-like products in mills. The aim is to markedly simplify the construction and assembly of such a flat sifter while improving the sanitary conditions. That aim is achieved by combining one or several double compartments, which are mounted laterally adjacent to one another with a universal drive unit.

Description

Plansichter Plansifter
Die Erfindung betrifft einen Plansichter, insbesondere einen Quadratplansichter und dessen Struktur bzgl. der tragenden Elemente.The invention relates to a plan sifter, in particular a square plan sifter and its structure with respect to the load-bearing elements.
Derartige Plansichter finden insbesondere Anwendung zur Sichtung von schrot-, griess- und/oder mehlartigen Produkten in der müllerischen Verfahrenstechnik, sowie zur Sortierung von verschiedenen pflanzlichen Kόmerarten wie z. B. Weizen, Roggen oder Mais bzw. allgemein zur Trennung von Korngut nach verschiedenen Komgrössen.Such plansifters are used in particular for the screening of grist, semolina and / or flour-like products in the mill process technology, as well as for the sorting of various vegetable grains such as. B. wheat, rye or corn or generally for the separation of grain by different grain sizes.
Plansichter, insbesondere Gross- und Quadratplansichter gehören zum gangigen Stand der Technik, z. B. zum Trennen bzw. Sieben/Sichten oder Klassifizieren von GetreidemahlproduktenPlansifters, especially large and square plansifters, are part of the current state of the art, e.g. B. for separating or sieving / classifying or classifying grain products
Die Arbeitsweise eines Plansichters wird von vielen Faktoren beeinflusst, wobei selbst im besten Zustand natürliche Leistungsgrenzen gesetzt sind. Ebenso ist die Intensität der Schwingbewegung (maximale Beschleunigung) begrenzt, sowohl durch das Bewegungsverhalten des Mahlgutes als auch durch die maximal zulassigen Kräfte im Gehäuse. Je nach spezifischer Qualltat der einzelnen Fraktionen sind die Leistungsdaten somit gegebenThe way a plan sifter works is influenced by many factors, even in the best condition there are natural performance limits. The intensity of the oscillating movement (maximum acceleration) is also limited, both by the movement behavior of the ground material and by the maximum permissible forces in the housing. The performance data are thus given depending on the specific quality of the individual fractions
Aus der WO 93/16815 ist ein Quadratplansichter bekannt, der einen Schwungan- tπeb aufweist, der dem Plansichter und allen Sieben eine kreisende Bewegung aufzwingt, wobei der Plansichter als Ganzes in üblicher Weise als Freischwinger an Stäben aufgehangen ist.A square plan sifter is known from WO 93/16815, which has a swing action which forces the plan sifter and all sieves to perform a circular movement, the plan sifter as a whole being suspended from bars in the usual way as a cantilever.
Bei derartigen Plansichtem werden waagerecht angeordnete Siebe unterschiedlicher Maschenweite vertikal zu Stapeln uberemanderliegend angeordnet. Die Siebe werden stapelformig zusammengestellt und in schrankform ige Siebgehause eingeschoben und verspannt Die Siebgehause sind zumeist symmetrisch beiderseits eines Unwuchtantriebes angeordnet Die Siebgehause bilden mit der Bodenplatte und durchgehenden Traversen eine tragende Konstruktion Die Siebgehause sind an ihren Stirnseiten mit dem zwischenliegenden Antπebsgehause über einen Ver- bindungstrager fest verbunden. Der Unwuchtantrieb kann hierbei eine Unwuchtmasse aufweisen, die drehzahlabhangig abstandsveranderhch mit der Antriebswelle verbunden ist (EP-A- 91331 ). Gemäss DE-PS 2823623 ist der Rahmen eines solchen Plansichters als ein, die Siebstapel aufnehmendes und seitlich abstützendes, tragendes Gehäuse mit einem, einen Tragboden für die Siebstapel ausbildenden Gehäuseboden und an dessen nach oben gerichteten Seltenwanden ausgeführt In einer anderen Form weist ein Plansichter gemäss DE-PS 2256307 Vertikalkrafte erzeugende Stapel-Spannvorrichtungen auf, wobei die Kräfte des Schwingungserregers über schwingungsstabile Decken- und Bodenelemente von starren Stapel- rahmen übertragen werden. Die Stapelrahmen sind gekennzeichnet durch je zwei Vertikalelemente, die jeweils in einer, den Stapelschwerpunkt enthaltenden, zu der durch die Stapel und den Schwingungserreger verlaufenden Langsebene rechtwinkligen Ebene angeordnet sind und die starr mit den Decken- und Bodenelementen der Stapelrahmen verbunden sind Die Vertikalelemente bilden die vertikalen Kanten eines quaderformigen Schwingrahmens, wobei die Schwingungslagerungen des Plansichters an diesen Vertikalelementen angeordnet sindIn such plan views, horizontally arranged screens of different mesh sizes are arranged vertically to form stacks one above the other. The sieves are put together in stacks and inserted and clamped in a cabinet-shaped sieve housing. The sieve housings are usually arranged symmetrically on both sides of an unbalance drive. The sieve housing forms a load-bearing structure with the base plate and continuous crossbeams. The unbalance drive can have an unbalanced mass which is connected to the drive shaft in a distance-dependent manner depending on the speed (EP-A-91331). According to DE-PS 2823623, the frame of such a plan sifter is designed as a supporting housing, which receives and laterally supports the sieve stack, with a housing base which forms a support base for the sieve stack and on its upward-facing rare walls. In another form, a plan sifter according to DE -PS 2256307 vertical clamping stacking devices, whereby the forces of the vibration exciter are transmitted via vibration-stable ceiling and floor elements of rigid stacking frames. The stacking frames are each characterized by two vertical elements, each of which is arranged in a plane containing the center of gravity of the stack, to the longitudinal plane perpendicular to the longitudinal plane through the stack and the vibration exciter, and which are rigidly connected to the ceiling and floor elements of the stacking frames. The vertical elements form the vertical Edges of a parallelepiped-shaped vibrating frame, the vibrating bearings of the plan sifter being arranged on these vertical elements
Solche Konstruktionen können zwar auch teilweise modular ausgeführt sein, ihre Herstellung ist jedoch aufwendigSuch constructions can also be partially modular, but their production is complex
Die Aufgabe der Erfindung besteht nun darin, einen gattungsgemassen Plansichter so auszubilden, dass deren Herstellung der tragenden Struktur durch weiterentwik- kelte Modulbauweise spurbar vereinfacht wird Des weiteren soll damit zugleich, innerhalb der schwingungstechnisch gesetzten Grenzen, das Eigengewicht verringert und die Sanitation und Zuganglichkeit verbessert werden Diese Aufgabe wird an Hand der Merkmale des Kennzeichens des Anspruchs 1 gelost Dadurch, dass der Kräftefluss über die tragende Struktur realisiert sein kann, ergeben sich weitergehende Möglichkeiten einer Modularisierung. Der Kräftefluss verläuft insgesamt weicher und es kann ein grosserer Anteil des Kräfteflusses funkti- onsfördernd über die Siebstapel geleitet werden Eine solche tragende Struktur ist nur von den Grundelementen Boden, Vertikaltrager und Deckel scheinbar mit dem Stand der Technik gemäss DE-PS 2256307 vergleichbar, nicht jedoch in der detaillierten Ausführung nahegelegt, da sie von den schwingungstechnischen Grundlagen her nicht erfasst ist Insbesondere ist die Herstellung und Montage der Teile der tragenden Struktur vereinfacht Der erfindungsgemässe Plansichter besteht in seiner tragenden Struktur aus mehreren Doppelabteilen, die miteinander seitlich verbunden sind und an den Enden mit Hilfe von Vertikaltragern aufgehängt werdenThe object of the invention is to design a generic plan sifter in such a way that its manufacture of the supporting structure is noticeably simplified by further developed modular construction. Furthermore, within the limits set by vibration technology, the dead weight is also to be reduced and sanitation and accessibility are to be improved This object is achieved on the basis of the features of the characterizing part of claim 1 The fact that the flow of forces can be realized via the supporting structure opens up further possibilities for modularization. The flow of forces is softer overall and a larger proportion of the flow of forces can be passed over the sieve stack in a function-enhancing manner. Such a supporting structure is apparently comparable only with the basic elements base, vertical support and cover with the prior art according to DE-PS 2256307, but not in the detailed version, since it is not covered by the fundamental principles of vibration engineering. In particular, the manufacture and assembly of the parts of the supporting structure is simplified. The plan sifter according to the invention consists of several double compartments in their supporting structure, which are laterally connected to each other and at the ends with Help be hung by vertical beams
Die Doppelabteile bestehen aus einem Deckel und einem Boden, die durch Verti- kalprofile verbunden sind und die mit Seitenteilen (je) zwei Abteile (Siebabteil) bil- den. Dadurch entfallt bzw kann eine gesonderte Rahmenkonstruktur für Boden und Deckel entfallenThe double compartments consist of a lid and a base, which are connected by vertical profiles and which form side compartments (each) with two compartments (sieve compartment). This eliminates or a separate frame structure for the bottom and lid can be omitted
In den Vertikalprofilen werden die Seitenteile formschlussig und kraftschlussig befestigt, wobei der Formschluss Dichtigkeit und damit Sanitation gewahrleistet Durch eine weitergehende Isolation werden Kalte- bzw Warmebrucken vermieden Ein Luftkanal in den Vertikalprofilen kann durch Durchstromung mit warmer Luft vom Deckel her ein Aufheizen der Profiloberflache bewirken, wodurch Kondensation vermieden wird Eine solche Option kann insbesondere bei heiklen Produkten sinnvoll sein Der Warmluftstrom kann durch Abscheidung vom Produktstrom oder auch separat bereitgestellt werdenIn the vertical profiles, the side parts are positively and non-positively fastened, whereby the positive locking ensures tightness and thus sanitation. Cold insulation or hot bridging is avoided by further insulation. An air duct in the vertical profiles can cause the profile surface to heat up by flowing hot air through it, thereby Condensation is avoided. Such an option can be particularly useful for delicate products. The hot air flow can be provided by separation from the product flow or separately
Die Siebstapel können dann, vorzugsweise rein formschlussig in die tragende Struktur eingesetzt und verspannt werden Die Verspannung dieser Siebstapel kann sowohl konventionell als auch in weiterer Ausbildung der Erfindung mit pneu- matischen Mitteln erfolgen Hierbei wird im Zwischenraum zwischen Siebstapel und Deckel ein elastisches, aufblasbares Element angeordnet, das bei Befullung mit Luft für ein definiertes, gleichbleibendes vertikales Verspannen sorgt und das zu- gleich geräuschdämmend wirkt. Im Gegensatz zum konventionellen Verspannen, welches von aussen erfolgt, kann somit einfacher und platzsparender von innen verspannt werden.The sieve stacks can then be inserted and clamped, preferably in a form-fitting manner, into the supporting structure. The sieve stacks can be braced both conventionally and in a further embodiment of the invention using pneumatic means. An elastic, inflatable element is arranged in the space between the sieve stack and cover , which, when filled with air, ensures a defined, constant vertical tensioning and has the same sound-absorbing effect. In contrast to conventional bracing, which takes place from the outside, bracing from the inside is easier and more space-saving.
In weiterer Ausbildung der Erfindung bestehen die äusseren Seitenteile und auch die Türen aus Sandwichkonstruktionen bzw. geschäumten Elementen, wobei derartige Sandwichelemente als solche bekannt sind, nicht jedoch eine solche Anwendung. Die Türen sind vorzugsweise form- und kraftschlüssig zwischen zwei Vertikalprofilen eingesetzt und verspannt und dabei leicht einsetzbar.In a further embodiment of the invention, the outer side parts and also the doors consist of sandwich constructions or foamed elements, such sandwich elements being known as such, but not such an application. The doors are preferably positively and non-positively inserted and braced between two vertical profiles and are easy to use.
Die Erfindung wird nachfolgend in einem Ausführungsbeispiel an Hand einer Zeichnung näher erläutert. In der Zeichnung zeigen dieThe invention is explained in more detail in an exemplary embodiment with reference to a drawing. In the drawing they show
Fig. 1 : eine Explosionsdarstellung eines PlansichtersFig. 1: an exploded view of a plan sifter
Fig. 2 ein DoppelabteilFig. 2 shows a double compartment
Fig. 3: eine Schnittdarstellung eines Abteils und einer TurFig. 3 is a sectional view of a compartment and a door
Fig 4* einen Deckel, von unten gesehenFig 4 * a lid, seen from below
Derartige Plansichter werden in hangender Anordnung betrieben, was in den Figuren nicht naher dargestellt ist. Ebenso nicht im Detail dargestellt ist der Unwuchtantrieb, der als eigenständige Antriebseinheit im Unterschied zum Stand der Technik als separate Baugruppe seitlich in den Plansichter eingeschoben und so mit den Doppelabteilen verbunden ist.Such plansifters are operated in a hanging arrangement, which is not shown in the figures. Also not shown in detail is the unbalance drive, which, as an independent drive unit, in contrast to the prior art, is inserted as a separate assembly into the side of the plan sifter and is thus connected to the double compartments.
Die Antriebseinheit stellt einen Unwuchtantrieb mit mitschwingendem Motor dar, um über den Antrieb die Doppelabteile und damit die stapelformig angeordneten Siebe in eine Schwingungsbewegung zu versetzen, die bei solchen Plansichtern üblich ist. Der Plansichter enthält als Quadratplansichter in diesem Ausführungsbeispiel 5x2 Siebstapel (9), wobei analoge Anordnungen von 1x2 Siebstapel (9) an aufwärts erfolgen können. Die tragende Struktur besteht nach diesem Beispiel aus fünf seitlich miteinander verbundenen Doppelabteilen sowie vier an den Querseiten ange- brachten Vertikaltragern 3. Die Doppelabteile selbst bestehen aus einem Boden 1 und einem Deckel 2, die durch Vertikalprofile 5 verbunden sind und mit Seitenteilen 6 zwei Abteile 4 bilden. Die Antriebseinheit ist jeweils im Zwischenraum der Doppelabteile angeordnet, unter Beachtung der Anzahl der Doppelabteile In die Vertikalprofile 5 sind die Seitenteile 6 mit einem Schaumstoff-Sandwichauf bau in Vertie- fungen 7 der Vertikalprofile 5 eingepasst In weiteren Aussparungen 8 der Vertikalprofile 5 sind in Siebstapeln 9 angeordnete Siebe eingesetzt und verspannt Eine vollständige horizontale Verspannung der Siebstapel 9 wird durch die eingesetzten Türen 10, die aus Seitenteilen 6, die in Turprofilen 15 gefasst sind, bestehen, gewährleistet. Die Seitenteile 6 bestehen aus metallischen Deckplatten 12 (vorzugsweise Aluminium) und einer Zwischenlage aus Schaumstoff 13 Isolationen (Polymereinlage) 14 in den Vertikalprofilen 5 dienen als Kaltebrucken. Die Seitenteile 6 werden lediglich in die Vertiefungen 7 eingesetzt und unter Zuhilfenahme von Lehren gespannt und geklebt.The drive unit represents an unbalance drive with an oscillating motor in order to set the double compartments and thus the stacked sieves in an oscillating movement via the drive, which is common with such plan sifters. The plan sifter contains, as a square plan sifter, 5x2 sieve stacks (9) in this exemplary embodiment, analogous arrangements being possible from 1x2 sieve stacks (9) upwards. According to this example, the load-bearing structure consists of five double compartments connected laterally to one another and four vertical supports 3 attached to the transverse sides. The double compartments themselves consist of a base 1 and a cover 2, which are connected by vertical profiles 5 and two compartments 4 with side panels 6 form. The drive unit is arranged in each case in the space between the double compartments, taking into account the number of double compartments. In the vertical profiles 5, the side parts 6 with a foam sandwich construction are fitted into recesses 7 in the vertical profiles 5. In further recesses 8 of the vertical profiles 5 are in sieve stacks 9 arranged sieves inserted and braced A complete horizontal bracing of the sieve stack 9 is ensured by the inserted doors 10, which consist of side parts 6, which are contained in door profiles 15. The side parts 6 consist of metallic cover plates 12 (preferably aluminum) and an intermediate layer made of foam 13. Insulations (polymer insert) 14 in the vertical profiles 5 serve as cold bridges. The side parts 6 are only inserted into the recesses 7 and tensioned and glued with the aid of teachings.
Die in den Vertikalprofilen 5 vorhandenen, durchgehenden Hohlräume dienen optional als zusätzlicher Luftkanal für warme Luft und verhindern Kondensbildung Die Vertikalprofile 5 selbst können handelsüblich aus Aluminiumprofilen bestehenThe continuous cavities in the vertical profiles 5 optionally serve as an additional air duct for warm air and prevent condensation. The vertical profiles 5 themselves can consist of aluminum profiles as is customary in the trade
Analog zur Ausbildung der Vertikalprofile 5 erfolgt die Ausbildung der Rahmen der Tur 10, auch im Hinblick auf die Verbindung mit dem Turblatt (analoges Seitenteil 6) trifft das vorgenannte zuThe frame of the door 10 is formed analogously to the formation of the vertical profiles 5, and the aforementioned also applies with regard to the connection to the door leaf (analog side part 6)
Die Vertikalprofile 5 selbst werden durch Schraubverbindungen mit dem Boden 1 und dem Deckel 2 verbunden, so dass die erforderliche Form und Festigkeit gege- benen ist und der Kraftfluss wie vorgenannt erfolgt Boden 1 und Deckel 2 werden lasergeschnitten und vor dem Beschichten formgebend gebogen Auf die äusseren Eckteile der Vertikalprofile 5 können Deckelemente befestigt sein (nicht dargestellt), um bündige, glattflächige Aussenkonturen des Plansichters zu erreichen. Analog auch an den oberen und unteren Seitenkanten.The vertical profiles 5 themselves are connected to the base 1 and the cover 2 by screw connections, so that the required shape and strength is given and the power flow takes place as mentioned above. Base 1 and cover 2 are laser-cut and bent to give a shape before coating Cover elements (not shown) can be attached to the outer corner parts of the vertical profiles 5 in order to achieve flush, smooth outer contours of the plan sifter. The same applies to the upper and lower side edges.
Die Seitenteile 6 können bereits mit dem erforderlichen Anstrich o. dgl. beschichtet sein, so dass eine weitergehende Behandlung vor, während oder nach der Montage entfallen kann.The side parts 6 can already be coated with the required paint or the like, so that further treatment before, during or after assembly can be omitted.
Ebenfalls optional ist im Zwischenraum zwischen dem Deckel 2 und dem obersten Sieb eines Siebstapels 9 ein schlauchförmiges Element (nicht dargestellt) so im wesentlichen auf dem Siebrahmen angeordnet, das bei Befüllung mit Luft o. a. Gasen ein definiertes, vertikales verspannen der Siebstapel 9 ermöglicht wird. Es liegt dabei eine gleichmässige Spannkraft an, die messbar ist, was auch die Betriebssicherheit erhöht.Also optionally in the space between the cover 2 and the uppermost sieve of a sieve stack 9 is a tubular element (not shown) arranged essentially on the sieve frame which, when filled with air or the like. Gases a defined, vertical bracing of the sieve stack 9 is made possible. There is a uniform clamping force that is measurable, which also increases operational safety.
Die Anordnung eines Schwingungserregers kann gemäss DE-PS 2256307 erfolgen, analog wird auch der Siebvorgang erfolgen. Bevorzugt ist der Antrieb als Baugruppe vormontiert und wird separat montiert, wodurch es möglich ist, den Transport eines Plansichters in Baugruppen zu bewerkstelligen und diesen vergleichs- weise aufwandsarm vor Ort zu komplettieren. A vibration exciter can be arranged according to DE-PS 2256307; the screening process will also be carried out analogously. The drive is preferably preassembled as a subassembly and is mounted separately, which makes it possible to transport a plan sifter in subassemblies and to complete it comparatively easily on site.
Verzeichnis der KurzzeichenList of abbreviations
1 Boden1 floor
2 Deckel2 lids
3 Vertikalträger3 vertical beams
4 Abteil4 compartment
5 Vertikalprofil 6 Seitenteil5 vertical profile 6 side part
7 Vertiefung7 deepening
8 Aussparung8 recess
9 Siebstapel9 sieve stacks
10 Tür 11 Zwischenraum10 door 11 space
12 Deckplatte12 cover plate
13 Schaumstoff13 foam
14 Isolation14 isolation
15 Türprofil 15 door profile

Claims

Patentanspruch Claim
1. Plansichter mit Schwingungslagerungen und wenigstens zwei durch eine Anzahl übereinander angeordneter Siebe gebildeten Siebstapel (9), die gegenüber einem Schwingungserreger in symmetrischen Lagen angeordnet sind, wobei die Siebstapel (9) horizontal und vertikal verspannt sind und die Kräfte des Schwingungserregers über schwingungsstabile Siebabteile auf die Siebstapel (9) übertragen werden, dadurch gekennzeichnet, dass die Siebstapel (9) zwischen jeweils vier Vertikalprofilen (5) aufgenommen und verspannt sind , und formschlussig eingesetzte und verspannte Seitenteile (6) und Türen (10) die Siebstapel (9) staubdicht umgeben, wobei die Türen (10) zugleich zur Verspannung der Siebstapel (9) beitragen1. Plansifter with vibration bearings and at least two sieve stacks (9) formed by a number of sieves arranged one above the other, which are arranged in symmetrical positions with respect to a vibration exciter, the sieve stacks (9) being braced horizontally and vertically and the forces of the vibration exciter via vibration-stable sieve compartments the sieve stacks (9) are transmitted, characterized in that the sieve stacks (9) are received and braced between each four vertical profiles (5), and positively inserted and braced side parts (6) and doors (10) surround the sieve stacks (9) in a dust-tight manner , wherein the doors (10) also contribute to the bracing of the sieve stack (9)
2 Plansichter nach Anspruch 1 , dadurch gekennzeichnet, dass die Seitenteile (6) Sandwichplatten sind, die aus metallischen Deckplatten (12) und einer Zwischenlage aus Schaumstoff (13) bestehen2 plansifter according to claim 1, characterized in that the side parts (6) are sandwich panels which consist of metallic cover plates (12) and an intermediate layer of foam (13)
3 Plansichter nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass in den Vertikalprofilen (5) und Turprofilen (15) Isolationen (14) zur Vermeidung von Kaltebrucken angeordnet sind, wobei eine Verbindung zu den Seitenteilen (6) gegeben ist3 plansifter according to claims 1 and 2, characterized in that in the vertical profiles (5) and door profiles (15) insulations (14) are arranged to avoid cold bridges, whereby a connection to the side parts (6) is provided
4 Plansichter nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass in den Vertikalprofilen (5) ein jeweils durchgehender Luftkanal vorgesehen ist4 plansifter according to claims 1 to 3, characterized in that a continuous air duct is provided in the vertical profiles (5)
5 Plansichter nach Anspruch 1 , dadurch gekennzeichnet, dass in einem Zwischenraum zwischen dem Deckel (2) und dem Siebstapel (9) auf dem obersten Siebrahmen des Siebstapel (9) ein flexibles, aufblasbares Element zur vertikalen Verspannung des Siebstapels (9) angeordnet ist 5 plansifter according to claim 1, characterized in that a flexible, inflatable element for vertical bracing of the sieve stack (9) is arranged in an intermediate space between the lid (2) and the sieve stack (9) on the top sieve frame of the sieve stack (9)
6. Plansichter nach Anspruch 1 , dadurch gekennzeichnet, dass eine Antriebseinheit mit dem Schwingungserreger als vollständig separat montierbare Baugruppe ausgebildet ist.6. Plansifter according to claim 1, characterized in that a drive unit with the vibration exciter is designed as a completely separately mountable assembly.
7. Plansichter nach Anspruch 1 , dadurch gekennzeichnet, dass die Siebabteile in Form von Doppelabteilen als vollständig separat montierbare Baugruppe ausgebildet sind, wobei mindestens ein Doppelabteil vorgesehen ist.7. Plansifter according to claim 1, characterized in that the sieve compartments are designed in the form of double compartments as a completely separately mountable assembly, at least one double compartment being provided.
8. Plansichter nach Anspruch 1 , dadurch gekennzeichnet, dass die Elemente aus zwei hochfesten Schichten (Boden (1 ) und Deckel (2)) sowie einem weicheren Kern (Abteil (4)) analog der Sandwichbauweise ausgebildet sind. 8. Plansifter according to claim 1, characterized in that the elements of two high-strength layers (bottom (1) and cover (2)) and a softer core (compartment (4)) are formed analogously to the sandwich construction.
GEÄNDERTE ANSPRÜCHECHANGED REQUIREMENTS
[beim Internationalen Büro am 24 November 1997 (24.11.97) eingegangen , ursprüngl iche Ansprüche 1 -8 durch neve Ansprüche[Received at the International Bureau on November 24, 1997 (November 24, 1997), original claims 1 -8 through new claims
1 -5 ersetzt (2 Seiten)]1 -5 replaced (2 pages)]
1. Plansichter mit Schwingungslagerungen und wenigstens zwei durch eine Anzahl übereinander angeordneter Siebe gebildeten Siebstapel (9), die gegenüber einem Schwingungsβrreger in symmetrischen Lagen angeordnet sind, wobei die Siθbstapel (9) horizontal und vertikal verspannt sind und die Kräfte des Schwingungserregers über schwingungsstabile Siebabteile auf die Siebstapel (9) übertragen werden, und dass die Siebstapel (9) zwischen jeweils vier Vertikalprofilen (5) aufgenommen und verspannt sind , und formschlüssig eingesetzte und verspannte Seitenteile (6) und Türen (10) die Siebstapel (9) staubdicht umgeben, wobei die Türen (10) zugleich zur Verspannung der Siebstapel (9) beitragen, dadurch gekennzeichnet, dass Siebabteile in Form von Doppelabteilen als vollständig separat montiβrbare Baugruppe ausgebildet sind, wobei mindestens ein Doppelabteil vorgesehen ist, und die Seitenteile (6) Sandwichplatten sind, die aus metallischen Deckplatten (12) und einer Zwischenlage aus Schaumstoff (13) bestehen und dass weiterhin in den Vertikalprofilen (5) und Türprofilen (15) Isolationen (14) zur Vermeidung von Kältebrücken angeordnet sind, wobei eine Verbindung zu den Seitenteilen (6) gegeben ist.1. Plansifter with vibration bearings and at least two sieve stacks (9) formed by a number of sieves arranged one above the other, which are arranged in symmetrical positions with respect to a vibration exciter, the sieve stacks (9) being braced horizontally and vertically and the forces of the vibration exciter via vibration-stable sieve compartments the sieve stacks (9) are transmitted, and that the sieve stacks (9) are received and braced between each four vertical profiles (5), and positively inserted and braced side parts (6) and doors (10) surround the sieve stacks (9) in a dust-tight manner, whereby the doors (10) also contribute to the bracing of the sieve stacks (9), characterized in that sieve compartments in the form of double compartments are designed as a completely separately mountable assembly, at least one double compartment being provided, and the side parts (6) are sandwich panels made of metallic cover plates (12) and an intermediate layer made of Sc consist of foam (13) and that furthermore insulations (14) are arranged in the vertical profiles (5) and door profiles (15) to avoid cold bridges, whereby there is a connection to the side parts (6).
2. Plansichter nach Anspruch 1 , dadurch gekennzeichnet, dass in den Vertikalprofilen (5) ein jeweils durchgehender Luftkanal vorgesehen ist.2. Plansifter according to claim 1, characterized in that a continuous air duct is provided in the vertical profiles (5).
3. Plansichter nach Anspruch 1 , dadurch gekennzeichnet, dass in einem Zwischenraum zwischen dem Deckel (2) und dem Siebstapel (9) auf dem obersten Siebrahmen des Siebstapel (9) ein flexibles, aufblasbares Element zur vertikalen Verspannung des Siebstapels (9) angeordnet ist. 3. Plansifter according to claim 1, characterized in that a flexible, inflatable element for vertical bracing of the sieve stack (9) is arranged in an intermediate space between the lid (2) and the sieve stack (9) on the uppermost sieve frame of the sieve stack (9) .
4. Plansichter nach Anspruch 1 , dadurch gekennzeichnet, dass eine Antriebseinheit mit dem Schwingungserreger als vollständig separat montierbare Baugruppe ausgebildet ist.4. Plansifter according to claim 1, characterized in that a drive unit with the vibration exciter is designed as a completely separately mountable assembly.
5. Plansichter nach Anspruch 1 , dadurch gekennzeichnet, dass die Elemente aus zwei hochfesten Schichten (Boden (1 ) und Deckel (2)) sowie einem weicheren Kern (Abteil (4)) analog der Sandwichbauweise ausgebildet sind. 5. Plansifter according to claim 1, characterized in that the elements of two high-strength layers (bottom (1) and cover (2)) and a softer core (compartment (4)) are formed analogously to the sandwich construction.
EP97922804A 1996-08-20 1997-06-04 Flat sifter Expired - Lifetime EP0921865B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH204296 1996-08-20
CH204296 1996-08-20
PCT/CH1997/000227 WO1998007529A1 (en) 1996-08-20 1997-06-04 Flat sifter

Publications (2)

Publication Number Publication Date
EP0921865A1 true EP0921865A1 (en) 1999-06-16
EP0921865B1 EP0921865B1 (en) 2001-01-17

Family

ID=4224587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97922804A Expired - Lifetime EP0921865B1 (en) 1996-08-20 1997-06-04 Flat sifter

Country Status (11)

Country Link
US (1) US6260710B1 (en)
EP (1) EP0921865B1 (en)
JP (1) JP4001924B2 (en)
KR (1) KR100472014B1 (en)
CN (1) CN1072986C (en)
AT (1) ATE198716T1 (en)
DE (1) DE59702932D1 (en)
ES (1) ES2154041T3 (en)
RU (1) RU2165803C2 (en)
TR (1) TR199802567T2 (en)
WO (1) WO1998007529A1 (en)

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WO2007061447A2 (en) * 2005-11-15 2007-05-31 Sefar Filtration Inc. Disposable pre-tensioned sieve frame and method of making same
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TR201005603A2 (en) 2010-07-09 2011-08-22 Yükseli̇ş Maki̇na Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Metal applications in single plates and frames in modular sieves.
ITPD20100342A1 (en) * 2010-11-16 2012-05-17 Omas Srl MODULAR AND MODULAR FRAME FOR VIBROSETACCI
CN102489447A (en) * 2011-12-02 2012-06-13 郑州飞机装备有限责任公司 Overlay type sifting lattices for square plansifter
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Also Published As

Publication number Publication date
CN1225596A (en) 1999-08-11
KR20000065232A (en) 2000-11-06
CN1072986C (en) 2001-10-17
JP4001924B2 (en) 2007-10-31
DE59702932D1 (en) 2001-02-22
RU2165803C2 (en) 2001-04-27
WO1998007529A1 (en) 1998-02-26
EP0921865B1 (en) 2001-01-17
JP2000516845A (en) 2000-12-19
ES2154041T3 (en) 2001-03-16
KR100472014B1 (en) 2005-05-03
ATE198716T1 (en) 2001-02-15
US6260710B1 (en) 2001-07-17
TR199802567T2 (en) 1999-05-21

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