EP0028792B1 - Multi-deck screening machine - Google Patents

Multi-deck screening machine Download PDF

Info

Publication number
EP0028792B1
EP0028792B1 EP80106751A EP80106751A EP0028792B1 EP 0028792 B1 EP0028792 B1 EP 0028792B1 EP 80106751 A EP80106751 A EP 80106751A EP 80106751 A EP80106751 A EP 80106751A EP 0028792 B1 EP0028792 B1 EP 0028792B1
Authority
EP
European Patent Office
Prior art keywords
deck
return
stack
screening machine
screen
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.)
Expired
Application number
EP80106751A
Other languages
German (de)
French (fr)
Other versions
EP0028792A2 (en
EP0028792A3 (en
Inventor
Ernst-Heinrich Dr.-Ing. Dressler
Hermann Rieschick
Klaus Dr.-Ing. Husemann
Frank Dr.-Ing. Puchalla
Götz Dr.rer.nat. Kneschke
Franz Dipl.-Ing. Brettschneider
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.)
Akademie der Wissenschaften der DDR
Original Assignee
Akademie der Wissenschaften der DDR
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 Akademie der Wissenschaften der DDR filed Critical Akademie der Wissenschaften der DDR
Priority to AT80106751T priority Critical patent/ATE19361T1/en
Publication of EP0028792A2 publication Critical patent/EP0028792A2/en
Publication of EP0028792A3 publication Critical patent/EP0028792A3/en
Application granted granted Critical
Publication of EP0028792B1 publication Critical patent/EP0028792B1/en
Expired legal-status Critical Current

Links

Images

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
    • B07B1/34—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro perpendicularly or approximately perpendiculary to the plane of the screen

Definitions

  • the invention relates to a multi-deck sieve machine designed as a throwing sieve of the type specified in the preamble of claim 1 for classifying dry, free-flowing bulk goods of small grain size, such as grinding and steel agents, in a large number of grain size classes in one operation.
  • screening machines are basically divided into throwing and face screening machines.
  • the sieving is carried out by vibrating the sieve in the horizontal and especially in the vertical direction, so that the material to be sieved carries out a throwing movement with a forward component.
  • plane screening machines the screening takes place without a throwing movement of the material to be screened by a type of shaking movement which takes place essentially parallel to the screen surface.
  • multi-deck screening machines Another shortcoming of such multi-deck screening machines is that with them only a small number of e.g. six grain size classes can be classified in one operation. If larger numbers of e.g. 10 to 25 grain size classes have to be classified, as is necessary for the production of abrasives or abrasives, several such multi-deck screening machines have to be set up and operated in parallel and in series. In addition, transfer devices for the screenings from one machine to another and mergers for the screenings are necessary.
  • multi-deck screening machines e.g. known from the company publication "Regula-Siebmaschinen" from Engelsmann AG, in which several screening, blind and return decks are clamped together in a frame to form a stack which is excited as a whole.
  • the inclination of the sieve stack can be adjusted depending on the required dwell time of the material to be sieved and its flowability.
  • the drive is preferably carried out by means of an eccentric acting in the horizontal direction.
  • this plan sieving machine allows the material to be returned, this type of sieving machine can also only be used to classify relatively small numbers of grain size classes in one operation.
  • the invention has for its object to provide a multi-deck sieve machine designed as a throwing sieve, which enables the material to be returned in a direction opposite to the direction of transport and which also works with a large degree of selectivity for a large number of grain size classes.
  • the return organs arranged according to the invention form a secondary vibrating system which is only excited by the vibration exciter of the screening machine and which, compared to the primary vibrating system of the vibrating frame and the screen deck, carries out natural vibrations which bring about the return of the material to be screened in the return organs.
  • the return elements are designed as channels which are inclined at an angle of 0 to 15 ° to the horizontal and which open out into channels located vertically in the sieve stack.
  • a plurality of return elements of a return deck can be coupled to one another, which enables the screen passages to be brought together from two upper screen decks.
  • the multi-deck screening machine according to the invention is preferably suitable for screening tasks in which the bulk material can be classified into up to 25 grain size classes with a relatively high selectivity in one operation, such as e.g. is required for abrasives and abrasives. Due to the type of vibration excitation in the sieve stack and the single or multiple return of the sieve passage from several sieve decks, a high degree of selectivity can be achieved even with fine-grained sieve material.
  • the throwing angle can be set from 45 to 85 ° to the horizontal or the point of action of the vibration exciter can be changed in order to create optimal sieving ratios for different screenings.
  • the multi-deck screen machine shown comprises a screen stack 1, which is arranged on a swing frame 2.
  • Sieve and blind decks 3 and return decks 4 are arranged one above the other in the sieve stack 1 and braced together by a base frame 5, a side frame 6, a cover frame 7 and a tensioning device 8.
  • a vibration exciter 10 is slidably and pivotably arranged.
  • its line of action 11 can be set such that the throw angle to the horizontal lies in the range from 45 to 85 °.
  • the screened-out granules are discharged via discharges 12.
  • channels 13 are provided in the return deck 4, which are inclined at an angle of 5 ° to the horizontal against the transport direction of the screened material. These channels 13 are suspended in a vertically free-swinging manner on springs 14 and are articulated at their ends to a frame 15 of the return deck 4 at 16. A plurality of channels 13 are coupled to one another at their ends 17 in order to bring together material flows of the same grain class.
  • the screen stack 1 rigidly arranged on the vibrating frame 2 is excited as a whole by the vibration exciter 10.
  • the vibrations can act on the screen stack 1 in accordance with the screening task to be solved.
  • the return of the material to be screened against the transport direction takes place through the vertical oscillating movements of the channels 13, which are caused by the excitation of the screen stack 1.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)
  • Seasonings (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)

Abstract

1. A multi-deck screening machine of the throwing-screen type comprising screening and blind decks (3) clamped in a vibrating frame (2, 5, 6) and forming a stack (1), and comprising vibration exciting means (10) arranged at the stack (1), characterized in that at least one return deck (4) for the screened material is provided, said return deck including return members (13) extending from the discharge side to the feeding side of the screen and being disposed vertically resiliently and having their ends pivotally connected to a frame.

Description

Die Erfindung betrifft eine als Wurfsieb ausgebildete Mehrdecksiebmaschine der im Oberbegriff des Patentanspruchs 1 angegebenen Gattung zur Klassierung trockener rieselfähiger Schüttgüter kleiner Korngrösse, wie Schleif- und Stahlmittel in eine Vielzahl von Korngrössenklassen in einem Arbeitsgang.The invention relates to a multi-deck sieve machine designed as a throwing sieve of the type specified in the preamble of claim 1 for classifying dry, free-flowing bulk goods of small grain size, such as grinding and steel agents, in a large number of grain size classes in one operation.

Nach der Funktionsweise werden Siebmaschinen grundsätzlich in Wurf- und Plansiebmaschinen unterteilt. Bei Wurfsiebmaschinen erfolgt die Siebung durch Schwingungen des Siebes in horizontaler und besonders in vertikaler Richtung, so dass das Siebgut eine Wurfbewegung mit einer Vorwärts-Komponente ausführt. Bei Plansiebmaschinen erfolgt die Siebung ohne Wurfbewegung des Siebgutes durch eine Art von Rüttelbewegungen, die sich im wesentlichen parallel zur Siebfläche vollziehen.According to the mode of operation, screening machines are basically divided into throwing and face screening machines. In the case of throwing sieve machines, the sieving is carried out by vibrating the sieve in the horizontal and especially in the vertical direction, so that the material to be sieved carries out a throwing movement with a forward component. In the case of plane screening machines, the screening takes place without a throwing movement of the material to be screened by a type of shaking movement which takes place essentially parallel to the screen surface.

Aus dem Prospekt «Hochleistungs-Schallsiebmaschinen» Bauart WA der Firma Rhewum ist eine als Wurfsieb ausgebildete Mehrdeckmaschine der angegebenen Gattung bekannt, bei welcher mehrere auf einem Grundrahmen übereinander gestapelte Siebdecks um Neigungswinkel von 30 bis 40° zur Waagerechten geneigt angeordnet sind. Der Antrieb der Siebmaschine erfolgt mit elektromagnetischen Schwingköpfen, die am Siebgehäuse angreifen. Zur Erregung des Siebgewebes sind Wellen unter dem Siebgewebe quer zur Förderrichtung angeordnet, die Schlagleisten tragen. Auf diesen Schlagleisten befindet sich eine Kunststoffummantelung, um das Siebgewebe zu schonen. Über die Stössel, deren Stösselköpfe, Winkelhebel und Schlagleisten werden die Schwingungen auf das Siebgewebe übertragen.From the brochure “High-performance sonic screening machines” type WA from the Rhewum company, a multi-deck machine of the specified type, known as a throwing screen, is known, in which several screen decks stacked on top of one another on a base frame are inclined at an angle of 30 to 40 ° to the horizontal. The screening machine is driven by electromagnetic oscillating heads that engage the screen housing. To excite the sieve fabric, waves are arranged under the sieve fabric transversely to the conveying direction, which carry blow bars. There is a plastic coating on these blow bars to protect the screen mesh. The vibrations are transferred to the screen fabric via the tappets, their tappet heads, angle levers and blow bars.

Bei einer aus dem Prospekt «Stössel-Schwingsiebmaschinen» des VEB Chemieanlagenbau Stassfurt, DDR bekannten anderen als Wurfsieb arbeitenden Mehrdecksiebmaschine erfolgt der Antrieb mittels elektromagnetischer Schwingungserreger, wobei die Schwingungen über Stössel direkt auf das Siebgewebe übertragen werden.In a multi-deck screening machine known from the brochure “Stössel vibrating screening machines” from VEB Chemieanlagenbau Stassfurt, GDR, which is known as a throwing screen, the drive is carried out by means of electromagnetic vibration exciters, whereby the vibrations are transmitted directly to the screen fabric via tappets.

Bei diesen besonders leistungsfähigen Mehrdecksiebmaschinen ist eine Rückführung des Siebgutes vom Austragsende eines Teils der Siebdecks zum Eintragsende von unteren Siebdecks nicht möglich, so dass sie zum Klassieren eines Korngemischs in eine Vielzahl von Korngrössenklassen in einem Arbeitsgang nicht geeignet sind. Die Siebböden schwingen mit horizontaler und mit ausgeprägter vertikaler Komponente, so dass eine Rückführung des Siebgutes entgegen der Wurfrichtung des Siebgutes auf den Siebflächen erfolgen müsste. Auch durch eine übergrosse Neigung der Rückführorgane vom Austragszum Eintragsende hin könnte aufgrund der Wurfbewegungen des Siebgutes eine Rückführung nicht sichergestellt werden, da sich das Siebgut trotz der starken Neigung im Rückführdeck stauen würde. Darüber hinaus hätte eine derartige Siebmaschine eine praktisch nicht akzeptable Bauhöhe. Ein weiterer Mangel derartiger Mehrdecksiebmaschinen besteht darin, dass mit diesen nur eine geringe Anzahl von z.B. sechs Korngrössenklassen in einem Arbeitsgang klassiert werden können. Wenn grössere Anzahlen von z.B. 10 bis 25 Korngrössenklassen klassiert werden müssen, wie dies zur Herstellung von Schleif- oder Strahlmitteln notwendig ist, müssen mehrere derartige Mehrdecksiebmaschinen in Parallel- und Reihenschaltung aufgestellt und betrieben werden. Zusätzlich sind Übergabeeinrichtungen für das Siebgut von einer Maschine zur anderen und Zusammenführungen für das Siebgut notwendig.With these particularly powerful multi-deck screening machines, it is not possible to return the material to be screened from the discharge end of part of the screen deck to the entry end of lower screen decks, so that they are not suitable for classifying a grain mixture into a large number of grain size classes in one operation. The sieve trays vibrate with horizontal and with pronounced vertical components, so that the material to be sieved should be returned on the sieve surfaces against the direction of throwing of the material to be sieved. Due to the throwing movements of the material to be screened, a return could not be ensured even if the return elements were inclined too large from the discharge end to the entry end, since the material to be screened would accumulate in the return deck despite the strong inclination. In addition, such a screening machine would have a practically unacceptable height. Another shortcoming of such multi-deck screening machines is that with them only a small number of e.g. six grain size classes can be classified in one operation. If larger numbers of e.g. 10 to 25 grain size classes have to be classified, as is necessary for the production of abrasives or abrasives, several such multi-deck screening machines have to be set up and operated in parallel and in series. In addition, transfer devices for the screenings from one machine to another and mergers for the screenings are necessary.

Ferner sind auch als Plansieb arbeitende Mehrdecksiebmaschinen, z.B. aus der Firmenschrift «Regula-Siebmaschinen» der Firma Engelsmann AG bekannt, bei denen mehrere Sieb-, Blind- und Rückführdecks in einem Rahmen miteinander zu einem Stapel verspannt sind, welcher als Ganzes erregt wird. Die Neigung des Siebstapels kann je nach der erforderlichen Verweilzeit des Siebgutes und seiner Fliessfähigkeit eingestellt werden. Der Antrieb erfolgt bevorzugt mittels eines in horizontaler Richtung wirkenden Exzenters. Obwohl diese Plansiebmaschine eine Rückführung des Siebgutes gestattet, können mit diesem Siebmaschinentyp ebenfalls nur relativ geringe Anzahlen an Korngrössenklassen in einem Arbeitsgang klassiert werden. Mit zunehmender Feinheit des Siebgutes werden die zusätzlich zur Schwerkraft wirksamen Haftkräfte grösser als die relativ geringen Schwerkräfte, wodurch die Trennschärfe der Siebmaschine im Feinkornbereich beeinträchtigt wird. Bedingt durch die typspezifische Siebbewegung können sich ausserdem auf den Siebböden grossflächige Verstopfungen ausbilden, die die Siebleistung verringern.Furthermore, multi-deck screening machines, e.g. known from the company publication "Regula-Siebmaschinen" from Engelsmann AG, in which several screening, blind and return decks are clamped together in a frame to form a stack which is excited as a whole. The inclination of the sieve stack can be adjusted depending on the required dwell time of the material to be sieved and its flowability. The drive is preferably carried out by means of an eccentric acting in the horizontal direction. Although this plan sieving machine allows the material to be returned, this type of sieving machine can also only be used to classify relatively small numbers of grain size classes in one operation. With increasing fineness of the screenings, the adhesive forces effective in addition to the force of gravity become greater than the relatively low gravitational forces, whereby the selectivity of the screening machine in the fine grain area is impaired. Due to the type-specific sieve movement, large blockages can also form on the sieve bottoms, which reduce the sieving capacity.

Schliesslich ist aus der CH-PS 413 564 ein Siebtrichter mit Vibrationsantrieb für die Getreidereinigung bekannt, bei dem unter jedem Siebboden je eine als starre Rutsche ausgebildete Rückleitfläche vorgesehen ist, die zumindest an ihrer Stirnseite fest mit dem Siebgehäuse verbunden ist.Finally, from CH-PS 413 564 a sieve funnel with vibration drive for grain cleaning is known, in which a return guide surface designed as a rigid slide is provided under each sieve plate, which is firmly connected to the sieve housing at least on its end face.

Der Erfindung liegt die Aufgabe zugrunde, eine als Wurfsieb ausgebildete Mehrdecksiebmaschine zu schaffen, die eine Rückführung des Siebgutes entgegen der Transportrichtung ermöglicht und die auch bei einer Vielzahl von Korngrössenklassen mit grosser Trennschärfe arbeitet.The invention has for its object to provide a multi-deck sieve machine designed as a throwing sieve, which enables the material to be returned in a direction opposite to the direction of transport and which also works with a large degree of selectivity for a large number of grain size classes.

Diese Aufgabe wird erfindungsgemäss durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst. Die erfindungsgemäss angeordneten Rückführorgane bilden ein sekundäres Schwingsystem, das nur von dem Schwingungserreger der Siebmaschine erregt wird und gegenüber dem primären Schwingungssystem des Schwingrahmens und der Siebdecks Eigenschwingungen ausführt, welche die Rückführung des Siebgutes in den Rückführorganen bewirken.According to the invention, this object is achieved by the characterizing features of patent claim 1. The return organs arranged according to the invention form a secondary vibrating system which is only excited by the vibration exciter of the screening machine and which, compared to the primary vibrating system of the vibrating frame and the screen deck, carries out natural vibrations which bring about the return of the material to be screened in the return organs.

Gemäss einer zweckmässigen Ausgestaltung der Erfindung sind die Rückführorgane als in einem Winkel von 0 bis 15° zur Waagerechten geneigt angeordnete Rinnen ausgebildet, die in senkrecht im Siebstapel befindliche Kanäle ausmünden.According to an expedient embodiment of the invention, the return elements are designed as channels which are inclined at an angle of 0 to 15 ° to the horizontal and which open out into channels located vertically in the sieve stack.

Zweckmässig können mehrere Rückführorgane eines Rückführdecks miteinander gekoppelt sein, was die Zusammenführung der Siebdurchgänge aus zwei oberen Siebdecks ermöglicht.Advantageously, a plurality of return elements of a return deck can be coupled to one another, which enables the screen passages to be brought together from two upper screen decks.

Die erfindungsgemässe Mehrdecksiebmaschine eignet sich vorzugsweise für Siebaufgaben, bei denen das Schüttgut in einem Arbeitsgang in bis zu 25 Korngrössenklassen mit relativ hoher Trennschärfe zu klassieren ist, wie dies z.B. bei Schleif- und Strahlmitteln gefordert wird. Durch die Art der Schwingungserregung im Siebstapel und durch die ein- oder mehrmalige Rückführung des Siebdurchganges von mehreren Siebdecks kann selbst bei feinstkörnigem Siebgut eine hohe Trennschärfe erreicht werden.The multi-deck screening machine according to the invention is preferably suitable for screening tasks in which the bulk material can be classified into up to 25 grain size classes with a relatively high selectivity in one operation, such as e.g. is required for abrasives and abrasives. Due to the type of vibration excitation in the sieve stack and the single or multiple return of the sieve passage from several sieve decks, a high degree of selectivity can be achieved even with fine-grained sieve material.

Durch Verschieben oder Verschwenken des Schwingungserregers am Schwingrahmen kann der Wurfwinkel von 45 bis 85° zur Waagerechten eingestellt oder der Angriffspunkt des Schwingungserregers verändert werden, um auch für unterschiedliche Siebgüter jeweils optimale Siebverhältnisse zu schaffen.By moving or swiveling the vibration exciter on the vibrating frame, the throwing angle can be set from 45 to 85 ° to the horizontal or the point of action of the vibration exciter can be changed in order to create optimal sieving ratios for different screenings.

Im folgenden wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung im einzelnen beschrieben. Es zeigen:

  • Fig. 1 eine Mehrdecksiebmaschine in schematischer Seitenansicht;
  • Fig. 2 einen Vertikalschnitt 11-11 in Fig. durch ein Rückführdeck;
  • Fig. das Rückführdeck nach Fig. 1 in Draufsicht.
In the following an embodiment of the invention will be described in detail with reference to the drawing. Show it:
  • Figure 1 is a multi-deck screening machine in a schematic side view.
  • Fig. 2 is a vertical section 11-11 in Fig. Through a return deck;
  • Fig. The return deck of FIG. 1 in plan view.

Die dargestellte Mehrdecksiebmaschine umfasst einen Siebstapel 1, der auf einem Schwingrahmen 2 angeordnet ist. Im Siebstapel 1 sind Sieb- und Blinddecks 3 sowie Rückführdecks 4 übereinander angeordnet und durch einen Grundrahmen 5, einen Seitenrahmen 6, einen Deckrahmen 7 sowie eine Spanneinrichtung 8 miteinander verspannt. An dem auf Federn 9 gelagerten Schwingrahmen 2 ist ein Schwingungserreger 10 verschiebbar und schwenkbar angeordnet. Dadurch kann seine Wirkungslinie 11 so eingestellt werden, dass der Wurfwinkel zur Waagerechten im Bereich von 45 bis 85° liegt. Die ausgesiebten Körnungen werden über Austräge 12 abgeführt.The multi-deck screen machine shown comprises a screen stack 1, which is arranged on a swing frame 2. Sieve and blind decks 3 and return decks 4 are arranged one above the other in the sieve stack 1 and braced together by a base frame 5, a side frame 6, a cover frame 7 and a tensioning device 8. On the swing frame 2 mounted on springs 9, a vibration exciter 10 is slidably and pivotably arranged. As a result, its line of action 11 can be set such that the throw angle to the horizontal lies in the range from 45 to 85 °. The screened-out granules are discharged via discharges 12.

Wie aus Fig. 2, 3 ersichtlich, sind im Rückführdeck 4 mehrere Rinnen 13 vorgesehen, die entgegen der Transportrichtung des Siebgutes unter einem Winkel von 5° zur Waagerechten geneigt sind. Diese Rinnen 13 sind an Federn 14 vertikal freischwingend aufgehängt und an ihren Enden mit einem Rahmen 15 des Rückführdecks 4 bei 16 gelenkig verbunden. Zum Zusammenführen von Siebgutströmen gleicher Kornklasse sind mehrere Rinnen 13 an ihren Enden 17 miteinander gekoppelt.2, 3, several channels 13 are provided in the return deck 4, which are inclined at an angle of 5 ° to the horizontal against the transport direction of the screened material. These channels 13 are suspended in a vertically free-swinging manner on springs 14 and are articulated at their ends to a frame 15 of the return deck 4 at 16. A plurality of channels 13 are coupled to one another at their ends 17 in order to bring together material flows of the same grain class.

Der starr auf dem Schwingrahmen 2 angeordnete Siebstapel 1 wird vom Schwingungserreger 10 als Ganzes erregt. Durch Verändern der Angriffsstelle des Schwingungserregers 10 am Schwingrahmen und durch Verstellen des Wurfwinkels a können die Schwingungen entsprechend der zu lösenden Siebaufgabe auf den Siebstapel 1 einwirken. Die Rückführung des Siebgutes entgegen der Transportrichtung erfolgt durch die vertikalen Schwingbewegungen der Rinnen 13, die durch die Erregung des Siebstapels 1 hervorgerufen werden.The screen stack 1 rigidly arranged on the vibrating frame 2 is excited as a whole by the vibration exciter 10. By changing the point of attack of the vibration exciter 10 on the vibrating frame and by adjusting the throwing angle a, the vibrations can act on the screen stack 1 in accordance with the screening task to be solved. The return of the material to be screened against the transport direction takes place through the vertical oscillating movements of the channels 13, which are caused by the excitation of the screen stack 1.

Claims (5)

1. A multi-deck screening machine of the throwing-screen type comprising screening and blind decks (3) clamped in a vibrating frame (2, 5, 6) and forming a stack (1), and comprising vibration exciting means (10) arranged at the stack (1), characterized in that at least one return deck (4) for the screened material is provided, said return deck including return members (13) extending from the discharge side to the feeding side of the screen and being disposed vertically resiliently and having their ends pivotally connected to a frame.
2. A multi-deck screening machine as claimed in claim 1, characterized in that the return members (13) are chutes terminating in vertical channels provided in the stack (1).
3. A multi-deck screening machine as claimed in claim 1 or claim 2, characterized in that several return members (13) of a return deck (4) are coupled to one another.
4. A multi-deck screening machine as claimed in any of the claims 1 to 3, characterized in that the vibration exciting means (10) is arranged at the stack (1) for shifting and swinging motion in such a way that its working line (11) acts on the stack (1) at an angle of 45° to 85° relative to the horizontal.
5. A multi-deck screening machine as claimed in any of the claims 1 to 4, characterized in that the chutes (13) are disposed at an inclination of 0 to 15° relative to the horizontal.
EP80106751A 1979-11-08 1980-11-03 Multi-deck screening machine Expired EP0028792B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80106751T ATE19361T1 (en) 1979-11-08 1980-11-03 MULTI DECK SCREEN.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD79216758A DD151882A1 (en) 1979-11-08 1979-11-08 multi deck
DD216758 1979-11-08

Publications (3)

Publication Number Publication Date
EP0028792A2 EP0028792A2 (en) 1981-05-20
EP0028792A3 EP0028792A3 (en) 1983-03-23
EP0028792B1 true EP0028792B1 (en) 1986-04-23

Family

ID=5520964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106751A Expired EP0028792B1 (en) 1979-11-08 1980-11-03 Multi-deck screening machine

Country Status (4)

Country Link
EP (1) EP0028792B1 (en)
AT (1) ATE19361T1 (en)
DD (1) DD151882A1 (en)
DE (1) DE3071571D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111014022A (en) * 2019-12-13 2020-04-17 长沙而道新能源科技有限公司 Tea processing equipment

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3524895C1 (en) * 1985-07-12 1986-12-18 Hein, Lehmann AG, 4000 Düsseldorf Screening machine
DD256227A3 (en) * 1985-09-23 1988-05-04 Akad Wissenschaften Ddr type of screen
EP2745941A1 (en) * 2012-12-21 2014-06-25 Sandvik Mining and Construction Oy Vibrating equipment and method of processing material
CN105107718A (en) * 2015-08-24 2015-12-02 海安县万力振动机械有限公司 Closed vibrating screen
CN105621005A (en) * 2016-03-07 2016-06-01 四川江油新川矿山机械有限公司 Screening and vibrating feeding machine
CN107716283A (en) * 2017-10-27 2018-02-23 安徽星辉工业科技有限公司 A kind of steaming utensil type vibration screening mechanism device for conveyer
CN110586465B (en) * 2019-10-11 2024-04-02 安徽康博特保健食品有限公司 Screening device for manufacturing health-care product tablets

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR646966A (en) * 1928-01-11 1928-11-19 Anciens Etablissements Lhuilli Improvements to shaker sieves
FR765692A (en) * 1932-12-15 1934-06-14 Method and devices for adjusting the movements of vibrating apparatus
US2238454A (en) * 1939-04-03 1941-04-15 Oliver W Steele Method for sizing corn
GB611289A (en) * 1946-04-26 1948-10-27 Simon Ltd Henry Improvements in plansifters
CH298059A (en) * 1950-09-15 1954-04-30 Limited Henry Simon Holdings Crusher for seeds.
CH413564A (en) * 1964-04-02 1966-05-15 Muehlenbau Dresden Veb Sieve sifter with vibration drive for grain cleaning
FR2314776A1 (en) * 1975-06-16 1977-01-14 Babbitless Sa DIRECTED ACTION VIBRATING DEVICE

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Firmenschrift "Regula-Siebmaschinen" der Firma Englesmann AG *
Prospekt "Hochleistungs-Schallschieb-maschine" Bauart WA der Firma Rhewum *
Prospekt "Stössel-Schhwungsiebmaschinen" des VEB Chemieanlagenbau Stassgut *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111014022A (en) * 2019-12-13 2020-04-17 长沙而道新能源科技有限公司 Tea processing equipment

Also Published As

Publication number Publication date
DE3071571D1 (en) 1986-05-28
EP0028792A2 (en) 1981-05-20
DD151882A1 (en) 1981-11-11
EP0028792A3 (en) 1983-03-23
ATE19361T1 (en) 1986-05-15

Similar Documents

Publication Publication Date Title
EP0155537B1 (en) Device for cleaning semolina
DE102006041989B4 (en) Sieving machine especially for difficult to separate mixtures, such as heavy oil-sand mixtures
DE10305589B4 (en) sieve
AT6073U1 (en) multi deck
DE2855436A1 (en) VIBRATION DEVICE
DE3826996A1 (en) VIBRATION SCREENER
DE3109319C2 (en) Multi-sieve apparatus
EP0028792B1 (en) Multi-deck screening machine
DE3932645C2 (en) Material classifier
EP0139783A1 (en) Device for processing scrap, waste or the like
DE3741966C2 (en)
EP0316461B1 (en) Vibratory screen
DE102020125280B3 (en) Vibrating screening machine
DE3221344C1 (en) Screening machine
DE1813224A1 (en) Method and device for sieving granular material that can be poured out
DE2923662C2 (en) Vibrating screen, especially circular vibrating screen
DE19517850C2 (en) Screening machine for pre-sorting material mixtures
DE2923474C2 (en) Sieving machine
DE3132140C1 (en) Screening machine
DE3018741C2 (en)
AT386769B (en) Air-jet multi-deck sieving machine
DD151882B1 (en) multi deck
DE2922814C3 (en) Scattering device for producing a chip fleece that can be pressed into chipboard.
DE577130C (en) Shuette sieve suspended on wire ropes, moved by unbalanced swing weight
AT393466B (en) VIBRATION SEPARATOR

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE GB LI SE

RBV Designated contracting states (corrected)

Designated state(s): AT BE CH GB LI SE

RBV Designated contracting states (corrected)

Designated state(s): AT BE CH DE GB LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH DE GB LI SE

17P Request for examination filed

Effective date: 19830831

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE GB LI SE

REF Corresponds to:

Ref document number: 19361

Country of ref document: AT

Date of ref document: 19860515

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3071571

Country of ref document: DE

Date of ref document: 19860528

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19921016

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19921021

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19921022

Year of fee payment: 13

Ref country code: CH

Payment date: 19921022

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19921027

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930126

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19931103

Ref country code: AT

Effective date: 19931103

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19931104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19931130

Ref country code: CH

Effective date: 19931130

Ref country code: BE

Effective date: 19931130

BERE Be: lapsed

Owner name: AKADEMIE DER WISSENSCHAFTEN DER DDR

Effective date: 19931130

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19931103

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940802

EUG Se: european patent has lapsed

Ref document number: 80106751.3

Effective date: 19940610