EP0536803A1 - Sieve-cleaning device, in particular for plansifter - Google Patents

Sieve-cleaning device, in particular for plansifter Download PDF

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Publication number
EP0536803A1
EP0536803A1 EP92118340A EP92118340A EP0536803A1 EP 0536803 A1 EP0536803 A1 EP 0536803A1 EP 92118340 A EP92118340 A EP 92118340A EP 92118340 A EP92118340 A EP 92118340A EP 0536803 A1 EP0536803 A1 EP 0536803A1
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EP
European Patent Office
Prior art keywords
screen
sieve
cleaner according
screen cleaner
floor
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EP92118340A
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German (de)
French (fr)
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EP0536803B1 (en
Inventor
Reinhard Rüter
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/50—Cleaning
    • B07B1/52—Cleaning with brushes or scrapers
    • B07B1/522—Cleaning with brushes or scrapers with brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/50—Cleaning
    • B07B1/54—Cleaning with beating devices

Definitions

  • the invention relates to a screen cleaner, in particular for the screen frames of plan sifters, as are used in mill operations for screening (sifting) the ground products.
  • a so-called square plan sifter is known from practice, in which the individual screen frames stacked one above the other have an essentially square outline shape.
  • Each sieve frame has a rectangular insert frame which is provided with a sieve covering.
  • the insertion frame is directly adjacent to the outer sieve frame on one side where the visible material is fed in, while on the three remaining sides product channels for removing the sieve overflow and the sieve diarrhea are incorporated into the outer sieve frame.
  • a further differentiation of the visible products is made possible by the fact that additional product channels are formed between the outer periphery of the sieve frame and a box-shaped sieve housing which accommodates the entire sieve stack.
  • the entire sieve compartment i.e. the sieve housing with one or more sieve stacks, is set in a horizontal circular oscillation during the viewing process.
  • Each sieve frame has a smooth bottom on which a freely movable floor scraper rests.
  • a corrugated grid for supporting screen cleaning bodies is arranged between the floor and the screen covering.
  • the screen cleaning bodies are formed, for example, by short pieces of braided belt material, which are provided with a metal button on the underside and which are excited to vibrate during their random movements over the corrugated grille, so that they easily strike against the screen covering.
  • This design of the screen cleaner causes considerable noise and contributes to a relatively high total weight of the screen frame.
  • the invention has for its object to provide a screen cleaner that enables a weight-saving and simple construction of the screen frame and with which a good cleaning effect can still be achieved.
  • the corrugated grids of the conventional screen frames can be omitted.
  • the cleaning of the sieve is also supported here by blows against the sieve covering, since the sieve cleaning bodies always have the tendency during their movement to tip over the lower end of their stem-like foot and thus strike the sieve covering with their outer upper edges. Tests have shown that the cleaning effect that can be achieved in this way is at least equal to the effect of conventional screen cleaning bodies on corrugated grids.
  • the screen cleaning body preferably has the shape of a three-armed star. Due to the cantilevered arms of the star, a high moment of inertia is achieved during the tilting movement with a relatively low overall weight, so that sufficiently violent blows are exerted on the fabric.
  • the star-shaped design also has the advantage that the arms of the screen cleaning body can penetrate well into the corners of the screen, so that an effective cleaning of the screen covering is also achieved there. While conventional sieve cleaning bodies made of belt material are rounded at the corners over time so that they can no longer penetrate into the corners of the sieve, the star-shaped sieve cleaning body retains its star-shaped shape even with partial wear.
  • the screen cleaning body preferably consists of a rubber-elastic plastic, so that at most very little wear occurs.
  • the spring action of the arms of the star when it hits the walls of the sieve frame also stimulates the sieve cleaning body to move violently, so that the cleaning effect is enhanced while on the other hand, due to the flexibility of the arms, excessive strain on the fabric is avoided. Because of these properties, the star-shaped screen cleaning body is also an advantage for conventional screen frames with corrugated grids.
  • the sieve cleaning element can also be combined with the floor clearers that are already on the sieve bottom. This enables a shortening of the stick-like foot and thus a saving in weight and a shortening of the tilting radius. Another advantage is that the engagement of the foot of the screen cleaning body in the floor scraper prevents the latter from being thrown out of the screen frame through the discharge slot for screen diarrhea.
  • An impact body is advantageously arranged on the sieve bottom, approximately below the middle of the sieve covering. While it can be observed with conventional screen cleaning bodies and screen frames that the screen cleaning body is mostly in the central region of the screen, the impact body has the function of driving the screen cleaning body into the edge and corner areas of the screen by frequent collisions.
  • a sieve compartment 10 of a plan sifter has a cylindrical sieve housing 12 which accommodates a number of sieve frames 14 stacked one above the other and exactly aligned with one another.
  • the sieve frames 14 are held at the corners by vertically extending strips 16 which are triangular in cross section and which are fastened to the inner wall of the sieve housing 12.
  • the sieve housing 12 is formed by two half-shells 18 made of aluminum sheet, which are detachably screwed together in a dividing plane running through two diagonally opposite corners of the sieve frame 14 via vertically extending flanges 20. After loosening one of the half-shells 18, the inserted screen frames 14 can be easily removed.
  • the segments of the half-shells 18 formed between the strips 16 each have a vertically extending, approximately trapezoidal stiffening profile 22 made of aluminum sheet on the inside.
  • the surfaces of the half-shells 18 and the stiffening profiles 22 and the strips 16 facing the interior of the screen housing are provided with a lining made of food-compatible, foamed plastic, felt or the like, which is not specified in any more detail.
  • the screen frame 14 has a cross grating 26 provided on its upper side with a screen covering 24, which is formed by outer frame members 28, 30 and central webs 32, 34.
  • a screen covering 24 is formed by outer frame members 28, 30 and central webs 32, 34.
  • the cross grille 26 is closed off by a smooth, continuous floor 36, which is on two opposite Edges are provided with spacer strips 38 for support on the next lower sieve frame.
  • the frame members 30 and the central web 32 are spaced apart from the bottom 36, so that discharge slots 40 are formed for the sieve diarrhea.
  • the sieve frame 14 constructed in this way consists only of a relatively small number of differently shaped woods, so that rational mass production is possible.
  • the product guidance described above can be changed in a simple manner by inserting the sieve frames 14 in different orientations and / or by attaching the feed plates 52, 54 to other sides of the sieve frame.
  • FIG. 2 shows two different embodiments of screen cleaning bodies 58 and 60, each of which has a stem-like foot 62.
  • the foot 62 engages in a recess in a disc-shaped bottom clearer 64 lying flat on the bottom 36, so that the bottom clearer 64 and the screen cleaning body 58 move together over the bottom surface during the shaking movements of the screen.
  • the foot 62 lies directly on the floor 36.
  • the lower end of the foot 62 is somewhat rounded, so that the screen cleaning body has a tendency to tip over until it strikes the screen covering 24 with its outer edge and rebounds.
  • the top of the screen cleaning bodies are provided with knobs or brushes 66 for gentle cleaning of the screen covering. Due to friction with the floor 36 and in particular due to collisions with the frame members or middle webs of the oscillating sieve frame, the sieve cleaning bodies are constantly held in an irregular tumbling movement, so that they gradually sweep over the entire sieve covering 24 at random.
  • baffles 68 fixed to the bottom 36 are provided, on which the bottom clearer 64 or the foot 62 is additionally pushed, so that the screen cleaning body is often thrown into the edge regions and corners of the screen frame.
  • the screen cleaning body 60 has the shape of a three-pointed star with relatively long and slender arms 70 which penetrate well into the corners of the screen covering.
  • the screen cleaning body 60 is made of a rubber-elastic material, so that the arms 70 in the event of collisions with the frame members of the sieve frame act like springs and stimulate the sieve cleaning body to undergo violent translational and rotational movements.
  • the elastic cushioning of the bumps also reduces noise.
  • the thickness of the screen cleaning body is dimensioned such that the arms have a softer suspension behavior when deflected vertically. In this way, good contact with the screen covering is ensured and overuse of the fine screen gauze is avoided.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Catching Or Destruction (AREA)

Abstract

Sieve cleaning devices, in particular for sieve frames (14) of a plan sifter, which, offset via a foot (62), can be inserted in the sieve frame so as to be freely movable below the sieve covering (24), characterised in that the sieve cleaning devices are designed as cantilever arms (70) and engage in a bottom cleaning device (64), said sieve cleaning devices executing preferably a wobbling movement with the shaking motion of the sieve. <IMAGE>

Description

Die Erfindung betrifft einen Siebreiniger, insbesondere für die Siebrahmen von Plansichtern, wie sie in Mühlenbetrieben zum Absieben (Sichten) der Mahlprodukte eingesetzt werden.The invention relates to a screen cleaner, in particular for the screen frames of plan sifters, as are used in mill operations for screening (sifting) the ground products.

Aus der Praxis ist ein sogenannter Quadratplansichter bekannt, bei dem die einzelnen übereinandergestapelten Siebrahmen eine im wesentlichen quadratische Umrißform besitzen. Jeder Siebrahmen weist einen rechteckigen Einlegerahmen auf, der mit einer Siebbespannung versehen ist. Der Einlegerahmen grenzt an einer Seite, an der die Aufgabe des Sichtmaterials erfolgt, unmittelbar an den äußeren Siebrahmen an, während an die drei übrigen Seiten Produktkanäle zur Abführung des Siebüberlaufs und des Siebdurchfalls in den äußeren Siebrahmen eingearbeitet sind. Eine weitere Differenzierung der Sichtprodukte wird dadurch ermöglicht, daß zusätzliche Produktkanäle zwischen dem äußeren Umfang der Siebrahmen und einem kastenförmigen Siebgehäuse gebildet werden, das den gesamten Siebstapel aufnimmt. Das gesamte Siebabteil, d.h., das Siebgehäuse mit einem oder mehreren Siebstapeln wird während des Sichtvorgangs in eine horizontale Kreisschwingung versetzt.A so-called square plan sifter is known from practice, in which the individual screen frames stacked one above the other have an essentially square outline shape. Each sieve frame has a rectangular insert frame which is provided with a sieve covering. The insertion frame is directly adjacent to the outer sieve frame on one side where the visible material is fed in, while on the three remaining sides product channels for removing the sieve overflow and the sieve diarrhea are incorporated into the outer sieve frame. A further differentiation of the visible products is made possible by the fact that additional product channels are formed between the outer periphery of the sieve frame and a box-shaped sieve housing which accommodates the entire sieve stack. The entire sieve compartment, i.e. the sieve housing with one or more sieve stacks, is set in a horizontal circular oscillation during the viewing process.

Jeder Siebrahmen weist einen glatten Boden auf, auf dem ein frei beweglicher Bodenausräumer aufliegt. Zwischen dem Boden und der Siebbespannung ist ein Wellgitter zur Abstützung von Siebreinigungskörpern angeordnet. Die Siebreinigungskörper werden beispielsweise durch kurze Stücke aus geflochtenem Gurtmaterial gebildet, die an der Unterseite mit einem Metallknopf versehen sind und bei ihren zufälligen Bewegungen über das Wellgitter zu Vibrationen angeregt werden, so daß sie leicht gegen die Siebbespannung schlagen. Diese Konstruktion des Siebreinigers verursacht eine erhebliche Geräuschbildung und trägt zu einem relativ hohen Gesamtgewicht der Siebrahmen bei.Each sieve frame has a smooth bottom on which a freely movable floor scraper rests. A corrugated grid for supporting screen cleaning bodies is arranged between the floor and the screen covering. The screen cleaning bodies are formed, for example, by short pieces of braided belt material, which are provided with a metal button on the underside and which are excited to vibrate during their random movements over the corrugated grille, so that they easily strike against the screen covering. This design of the screen cleaner causes considerable noise and contributes to a relatively high total weight of the screen frame.

Der Erfindung liegt die Aufgabe zugrunde, einen Siebreiniger zu schaffen, der eine gewichtssparende und einfache Konstruktion der Siebrahmen ermöglicht und mit dem dennoch eine gute Reinigungswirkung erzielbar ist.The invention has for its object to provide a screen cleaner that enables a weight-saving and simple construction of the screen frame and with which a good cleaning effect can still be achieved.

Diese Aufgabe wird erfindungsgemäß gelöst durch Siebreiniger mit den in den unabhängigen Ansprüchen 1 und 11 angegebenen Merkmalen.This object is achieved according to the invention by screen cleaners with the features specified in independent claims 1 and 11.

Bei dieser Konstruktion der Siebreiniger können die Wellgitter der herkömmlichen Siebrahmen entfallen. Dennoch wird auch hier die Reinigung des Siebes durch Schläge gegen die Siebbespannung unterstützt, da die Siebreinigungskörper bei ihrer Bewegung ständig die Tendenz haben, um das untere Ende ihres stielartigen Fußes zu kippen und dadurch mit ihren äußeren oberen Rändern an der Siebbespannung anstoßen. Versuche haben ergeben, daß die auf diese Weise erzielbare Reinigungswirkung der Wirkung herkömmlicher Siebreinigungskörper auf Wellgittern zumindest ebenbürtig ist.With this design of the screen cleaner, the corrugated grids of the conventional screen frames can be omitted. Nevertheless, the cleaning of the sieve is also supported here by blows against the sieve covering, since the sieve cleaning bodies always have the tendency during their movement to tip over the lower end of their stem-like foot and thus strike the sieve covering with their outer upper edges. Tests have shown that the cleaning effect that can be achieved in this way is at least equal to the effect of conventional screen cleaning bodies on corrugated grids.

Bevorzugt hat der Siebreinigungskörper die Form eines dreiarmigen Sterns. Durch die weit auskragenden Arme des Sterns wird bei verhältnismäßig geringem Gesamtgewicht ein hohes Trägheitsmoment bei der Kippbewegung erreicht, so daß ausreichend heftige Schläge auf die Siebbespannung ausgeübt werden.The screen cleaning body preferably has the shape of a three-armed star. Due to the cantilevered arms of the star, a high moment of inertia is achieved during the tilting movement with a relatively low overall weight, so that sufficiently violent blows are exerted on the fabric.

Die sternförmige Gestaltung hat darüber hinaus den Vorteil, daß die Arme des Siebreinigungskörpers gut in die Ecken des Siebes eindringen können, so daß auch dort eine wirksame Reinigung der Siebbespannung erreicht wird. Während herkömmliche Siebreinigungskörper aus Gurtmaterial mit der Zeit an den Ecken abgerundet werden, so daß sie in die Ecken des Siebes nicht mehr eindringen können, behält der sternförmige Siebreinigungskörper auch bei teilweiser Abnutzung noch seine sternfömige Gestalt. Bevorzugt besteht der Siebreinigungskörper aus einem gummielastischen Kunststoff, so daß allenfalls eine sehr geringe Abnutzung eintritt. Durch die Federwirkung der Arme des Sterns beim Anstoßen an den Wänden des Siebrahmens wird der Siebreinigungskörper darüber hinaus zu heftigen Bewegungen angeregt, so daß die Reinigungswirkung verstärkt wird, während andererseits aufgrund der Nachgiebigkeit der Arme eine Überbeanspruchung der Siebbespannung vermieden wird. Aufgrund dieser Eigenschaften ist der sternförmige Siebreinigungskörper auch bei herkömmlichen Siebrahmen mit Wellgittern von Vorteil.The star-shaped design also has the advantage that the arms of the screen cleaning body can penetrate well into the corners of the screen, so that an effective cleaning of the screen covering is also achieved there. While conventional sieve cleaning bodies made of belt material are rounded at the corners over time so that they can no longer penetrate into the corners of the sieve, the star-shaped sieve cleaning body retains its star-shaped shape even with partial wear. The screen cleaning body preferably consists of a rubber-elastic plastic, so that at most very little wear occurs. The spring action of the arms of the star when it hits the walls of the sieve frame also stimulates the sieve cleaning body to move violently, so that the cleaning effect is enhanced while on the other hand, due to the flexibility of the arms, excessive strain on the fabric is avoided. Because of these properties, the star-shaped screen cleaning body is also an advantage for conventional screen frames with corrugated grids.

Bei Siebrahmen ohne Wellgitter kann der Siebreinigungskörper auch mit den ohnehin auf dem Siebboden liegenden Bodenausräumern kombiniert werden. Dies ermöglicht eine Verkürzung des stielartigen Fußes und damit ein Gewichtsersparnis sowie eine Verkürzung des Kippradius. Ein weiterer Vorteil besteht darin, daß durch den Eingriff des Fußes des Siebreinigungskörpers in den Bodenausräumer verhindert wird, daß letzterer durch den Ausgabeschlitz für den Siebdurchfall aus dem Siebrahmen herausgeschleudert wird.In the case of sieve frames without a corrugated grid, the sieve cleaning element can also be combined with the floor clearers that are already on the sieve bottom. This enables a shortening of the stick-like foot and thus a saving in weight and a shortening of the tilting radius. Another advantage is that the engagement of the foot of the screen cleaning body in the floor scraper prevents the latter from being thrown out of the screen frame through the discharge slot for screen diarrhea.

Mit Vorteil ist auf dem Siebboden etwa unter der Mitte der Siebbespannung ein Prallkörper angeordnet. Während bei herkömmlichen Siebreinigungskörpern und Siebrahmen zu beobachten ist, daß sich der Siebreinigungskörper zumeist im Mittelbereich des Siebes aufhält, hat der Prallkörper die Funktion, den Seibreinigungskörper durch häufige Kollisionen in die Rand- und Eckbereiche des Siebes zu treiben.An impact body is advantageously arranged on the sieve bottom, approximately below the middle of the sieve covering. While it can be observed with conventional screen cleaning bodies and screen frames that the screen cleaning body is mostly in the central region of the screen, the impact body has the function of driving the screen cleaning body into the edge and corner areas of the screen by frequent collisions.

Im folgenden werden bevorzugte Ausführungsbeispiele der Erfindung anhand der Zeichnungen näher erläutert.Preferred exemplary embodiments of the invention are explained in more detail below with reference to the drawings.

Es zeigen:

Fig. 1
einen Grundriß eines Siebabteils eines Plansichters;
Fig. 2
einen Schnitt durch einen Siebrahmen längs der Linie II-II in Fig. 1; und
Fig. 3
den Grundriß eines Siebreinigungskörpers.
Show it:
Fig. 1
a plan of a screen section of a plan sifter;
Fig. 2
a section through a screen frame along the line II-II in Fig. 1; and
Fig. 3
the outline of a screen cleaning body.

Ein Siebabteil 10 eines Plansichters weist gemäß Figur 1 ein zylindrisches Siebgehäuse 12 auf, das eine Anzahl übereinandergestapelter und exakt miteinander fluchtender Siebrahmen 14 aufnimmt. Die Siebrahmen 14 sind an den Ecken durch vertikal verlaufende, im Querschnitt dreieckige Leisten 16 gehalten, die an der Innenwand des Siebgehäuses 12 befestigt sind. Das Siebgehäuse 12 wird durch zwei Halbschalen 18 aus Aluminiumblech gebildet, die in einer durch zwei diagonal gegenüberliegende Ecken der Siebrahmen 14 verlaufenden Teilungsebene über vertikal verlaufende Flansche 20 lösbar miteinander verschraubt sind. Nach dem Lösen einer der Halbschalen 18 sind die eingelegten Siebrahmen 14 bequem entnehmbar.According to FIG. 1, a sieve compartment 10 of a plan sifter has a cylindrical sieve housing 12 which accommodates a number of sieve frames 14 stacked one above the other and exactly aligned with one another. The sieve frames 14 are held at the corners by vertically extending strips 16 which are triangular in cross section and which are fastened to the inner wall of the sieve housing 12. The sieve housing 12 is formed by two half-shells 18 made of aluminum sheet, which are detachably screwed together in a dividing plane running through two diagonally opposite corners of the sieve frame 14 via vertically extending flanges 20. After loosening one of the half-shells 18, the inserted screen frames 14 can be easily removed.

Die zwischen den Leisten 16 gebildeten Segmente der Halbschalen 18 weisen jeweils auf der Innenseite ein vertikal verlaufendes, etwa trapezförmiges Versteifungsprofil 22 aus Aluminiumblech auf. Die dem Inneren des Siebgehäuses zugewandten Oberflächen der Halbschalen 18 und der Versteifungsprofile 22 sowie der Leisten 16 sind mit einer nicht näher bezeichneten Auskleidung aus lebensmittelverträglichem, geschäumtem Kunststoff, Filz oder dergleichen versehen.The segments of the half-shells 18 formed between the strips 16 each have a vertically extending, approximately trapezoidal stiffening profile 22 made of aluminum sheet on the inside. The surfaces of the half-shells 18 and the stiffening profiles 22 and the strips 16 facing the interior of the screen housing are provided with a lining made of food-compatible, foamed plastic, felt or the like, which is not specified in any more detail.

Der Siebrahmen 14 weist gemäß Figur 2 ein an seiner Oberseite mit einer Siebbespannung 24 versehenes Kreuzgitter 26 auf, das durch äußere Rahmenhölzer 28,30 und Mittelstege 32,34 gebildet wird. An der Unterseite wird das Kreuzgitter 26 durch einen glatten, durchgehenden Boden 36 abgeschlossen, der an zwei gegenüberliegenden Rändern mit Distanzleisten 38 zur Abstützung auf dem nächsttieferen Siebrahmen versehen ist. Die Rahmemhölzer 30 und der Mittelsteg 32 verlaufen in Abstand zu dem Boden 36, so daß Ausgabeschlitze 40 für den Siebdurchfall gebildet werden. Der in dieser Weise aufgebaute Siebrahmen 14 besteht nur aus einer verhältnismäßig geringen Anzahl verschieden gestalteter Hölzer, so daß eine rationelle Massenfertigung ermöglicht wird.According to FIG. 2, the screen frame 14 has a cross grating 26 provided on its upper side with a screen covering 24, which is formed by outer frame members 28, 30 and central webs 32, 34. On the underside, the cross grille 26 is closed off by a smooth, continuous floor 36, which is on two opposite Edges are provided with spacer strips 38 for support on the next lower sieve frame. The frame members 30 and the central web 32 are spaced apart from the bottom 36, so that discharge slots 40 are formed for the sieve diarrhea. The sieve frame 14 constructed in this way consists only of a relatively small number of differently shaped woods, so that rational mass production is possible.

Zwischen den äußeren Rahmenhölzern 28,30 der Siebrahmen 14 und den gegenüberliegenden Segmenten des Siebgehäuses 12 werden vier gegeneinander abgedichtete Produktkanäle 42,44, 46,48 zur Zu- und Abführung des Sichtmaterials gebildet. Im Bedarfsfall können die Hohlräume der Versteifungsprofile 22 als zusätzliche Produktkanäle 50 genutzt werden.Between the outer frame members 28, 30 of the sieve frame 14 and the opposite segments of the sieve housing 12, four product channels 42, 44, 46, 48 are sealed against each other for supplying and removing the visible material. If necessary, the cavities of the stiffening profiles 22 can be used as additional product channels 50.

An einem der Rahmenhölzer 28 des Siebrahmens 14 ist eine waagerecht in den Produktkanal 42 vorspringende Aufgabeplatte 52 angebracht, deren äußerer Rand dicht an der Auskleidung des Siebgehäuses 12 anliegt. Über diese Aufgabeplatte 52 wird das durch den Produktkanal 42 zugeführte Sichtmaterial auf die Siebbespannung 24 geleitet. Das gesamte Siebabteil 10 führt eine Kreisschwingung in der Zeichenebene der Figur 1 aus, so daß das Sichtmaterial über die Siebbespannung 24 verteilt und gesiebt wird. Der Siebdurchfall wird über die Ausgabeschlitze 40 in die Produktkanäle 46 und 48 abgegeben, während der Siebüberlauf über den Produktkanal 44 auf eine in Figur 2 gestrichelt angedeutete Aufgabeplatte 54 des nächsttieferen Siebrahmens geleitet wird.On one of the frame members 28 of the sieve frame 14 there is a feed plate 52 projecting horizontally into the product channel 42, the outer edge of which rests closely on the lining of the sieve housing 12. The visible material fed through the product channel 42 is guided onto the screen covering 24 via this feed plate 52. The entire sieve compartment 10 executes a circular oscillation in the plane of the drawing in FIG. 1, so that the visible material is distributed and sieved over the sieve covering 24. The sieve diarrhea is discharged into the product channels 46 and 48 via the discharge slots 40, while the sieve overflow is directed via the product channel 44 onto a feed plate 54 of the next lower sieve frame, indicated by dashed lines in FIG.

Die oben beschriebene Produktführung kann auf einfache Weise dadurch geändert werden, daß die Siebrahmen 14 in unterschiedlichen Orientierungen eingelegt werden und/oder daß die Aufgabeplatten 52,54 an anderen Seiten des Siebrahmens angebracht werden. Wahlweise ist es auch möglich, den Boden 36 mit Durchbrüchen zu versehen, so daß der Siebdurchfall unmittelbar auf das darunterliegende Sieb geleitet wird.The product guidance described above can be changed in a simple manner by inserting the sieve frames 14 in different orientations and / or by attaching the feed plates 52, 54 to other sides of the sieve frame. Alternatively it is possible to provide the bottom 36 with openings so that the sieve diarrhea is passed directly to the underlying sieve.

Darüber hinaus besteht die Möglichkeit, die Aufgabeplatte 52 zu kürzen, wie durch eine gestrichelte Linie 56 in Figur 1 angedeutet wird. In diesem Fall wird nur ein Teil des Materialstroms durch die Aufgabeplatte 52 aufgefangen und auf die Siebbespannung 24 gelenkt, während ein anderer Teilstrom des Materials durch die in dem Produktkanal 42 verbleibenden Öffnungen hindurchfällt und in einer tieferen Position parallel mit Hilfe eines anderen Siebes verarbeitet wird.In addition, there is the possibility of shortening the feed plate 52, as is indicated by a broken line 56 in FIG. 1. In this case, only a part of the material flow is caught by the feed plate 52 and directed onto the screen covering 24, while another part flow of the material falls through the openings remaining in the product channel 42 and is processed in parallel in a lower position with the aid of another sieve.

In Figur 2 sind zwei verschiedene Ausführungsformen von Siebreinigungskörpern 58 und 60 dargestellt, die jeweils einen stielartigen Fuß 62 aufweisen. Bei dem Siebreinigungskörper 58 greift der Fuß 62 in eine Ausnehmung eines flach auf dem Boden 36 aufliegenden scheibenförmigen Bodenausräumers 64 ein, so daß der Bodenausräumer 64 und der Siebreinigungskörper 58 sich bei den Rüttelbewegungen des Siebes gemeinsam über die Bodenfläche bewegen. Bei dem Siebreinigungskörper 60 liegt der Fuß 62 dagegen unmittelbar auf dem Boden 36 auf. In beiden Fällen ist das untere Ende des Fußes 62 etwas abgerundet, so daß der Siebreinigungskörper die Tendenz zu kippen hat, bis er mit seinem äußeren Rand an der Siebbespannung 24 anschlägt und zurückprallt. Die Siebreinigungskörper sind an der Oberseite mit Noppen bzw. Bürsten 66 zur schonenden Reinigung der Siebbespannung versehen. Durch Reibung mit dem Boden 36 und insbesondere durch Zusammenstöße mit den Rahmenhölzern bzw. Mittelstegen des oszillierenden Siebrahmens werden die Siebreinigungskörper ständig in einer unregelmäßigen taumelnden Bewegung gehalten, so daß sie nach dem Zufallsprinzip nach und nach die gesamte Siebbespannung 24 überstreichen.FIG. 2 shows two different embodiments of screen cleaning bodies 58 and 60, each of which has a stem-like foot 62. In the screen cleaning body 58, the foot 62 engages in a recess in a disc-shaped bottom clearer 64 lying flat on the bottom 36, so that the bottom clearer 64 and the screen cleaning body 58 move together over the bottom surface during the shaking movements of the screen. In contrast, in the screen cleaning body 60, the foot 62 lies directly on the floor 36. In both cases, the lower end of the foot 62 is somewhat rounded, so that the screen cleaning body has a tendency to tip over until it strikes the screen covering 24 with its outer edge and rebounds. The top of the screen cleaning bodies are provided with knobs or brushes 66 for gentle cleaning of the screen covering. Due to friction with the floor 36 and in particular due to collisions with the frame members or middle webs of the oscillating sieve frame, the sieve cleaning bodies are constantly held in an irregular tumbling movement, so that they gradually sweep over the entire sieve covering 24 at random.

Die Reinigungswirkung wird dadurch unterstützt, daß die Siebreinigungskörper kippelnde Bewegungen ausführen und dadurch die Siebbespannung in Vibration versetzen. In der Mitte der einzelnen Felder der Siebbespannung sind fest an dem Boden 36 befestigte Prallkörper 68 vorgesehen, an denen der Bodenausräumer 64 bzw. der Fuß 62 zusätzlich angestoßen wird, so daß der Siebreinigungskörper häufig in die Randbereiche und Ecken des Siebrahmens geschleudert wird.The cleaning effect is supported in that the screen cleaning bodies perform tilting movements and thereby set the screen covering in vibration. In the middle of the individual fields of the screen covering, baffles 68 fixed to the bottom 36 are provided, on which the bottom clearer 64 or the foot 62 is additionally pushed, so that the screen cleaning body is often thrown into the edge regions and corners of the screen frame.

Wie in Figur 3 zu erkennen ist, weist der Siebreinigungskörper 60 die Form eines dreizackigen Sterns mit relativ langen und schlanken Armen 70 auf, die gut in die Ecken der Siebbespannung eindringen, Der Siebreinigungskörper 60 ist aus einem gummielastischen Material hergestellt, so daß die Arme 70 bei Zusammenstößen mit den Rahmenhölzern des Siebrahmens wie Sprungfedern wirken und den Siebreinigungskörper zu heftigen Translations- und Rotationsbewegungen anregen. Durch die elastische Abfederung der Stöße wird zugleich eine Geräuschminderung erreicht. Die Dicke des Siebreinigungskörpers ist so bemessen, daß die Arme bei vertikaler Auslenkung ein weicheres Federungsverhalten aufweisen. Auf diese Weise wird ein guter Berührungskontakt mit der Siebbespannung gewährleistet und eine Überbeanspruchung der feinen Siebgaze vermieden.As can be seen in FIG. 3, the screen cleaning body 60 has the shape of a three-pointed star with relatively long and slender arms 70 which penetrate well into the corners of the screen covering. The screen cleaning body 60 is made of a rubber-elastic material, so that the arms 70 in the event of collisions with the frame members of the sieve frame act like springs and stimulate the sieve cleaning body to undergo violent translational and rotational movements. The elastic cushioning of the bumps also reduces noise. The thickness of the screen cleaning body is dimensioned such that the arms have a softer suspension behavior when deflected vertically. In this way, good contact with the screen covering is ensured and overuse of the fine screen gauze is avoided.

Claims (15)

Siebreiniger, insbesondere für Siebrahmen (14) eines Plansichters, welche über einen Fuß (62) abgesetzt frei beweglich unter der Siebbespannung (24) in den Siebrahmen einlegbar sind, dadurch gekennzeichnet, daß die Siebreiniger als auskragende Arme (70) ausgebildet sind und in einen Bodenreiniger eingreifen, wobei sie mit der Rüttelbewegung des Siebes vorzugsweise eine kippelnde Bewegung ausführen.Sieve cleaner, in particular for sieve frames (14) of a plan sifter, which can be inserted in a freely movable manner under the sieve covering (24) into the sieve frame via a foot (62), characterized in that the sieve cleaners are designed as projecting arms (70) and in one Intervene with floor cleaners, preferably performing a rocking motion with the shaking motion of the sieve. Siebreiniger nach Anspruch 1, dadurch gekennzeichnet, daß die auskragenden Arme (70) an ihrer Oberseite mit Noppen oder Bürsten (66) versehen sind.Screen cleaner according to claim 1, characterized in that the projecting arms (70) are provided with knobs or brushes (66) on their upper side. Siebreiniger nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Siebreiniger über einen vorstehenden Fuß (62) abgestützt sind.Screen cleaner according to claim 1 or 2, characterized in that the screen cleaners are supported by a projecting foot (62). Siebreiniger nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der stielartige Fuß (62) zur unmittelbaren Auflage auf dem glatten Boden (26) ausgebildet ist.Screen cleaner according to one of claims 1 to 3, characterized in that the stem-like foot (62) is designed for direct support on the smooth floor (26). Siebreiniger nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die auskragenden Arme (70) als Füße ausgebildet sind.Screen cleaner according to one of claims 1 to 4, characterized in that the projecting arms (70) are designed as feet. Siebreiniger nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Bodenreiniger als Bodenausräumer (64) scheibenförmig ausgebildet ist, zur direkten Auflage auf einem glatten Siebboden (36).Screen cleaner according to one of claims 1 to 5, characterized in that the floor cleaner is designed as a floor scraper (64) in the form of a disc, for direct support on a smooth screen bottom (36). Siebreiniger nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß er aus einem elastischen Material besteht und insbesondere bei vertikaler Auslenkung ein weiches Federungsverhalten aufweist.Screen cleaner according to one of claims 1 to 6, characterized in that it consists of an elastic material and has a soft suspension behavior in particular with vertical deflection. Siebreiniger nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß er im Grundriß eine Sternform aufweist.Screen cleaner according to one of claims 1 to 7, characterized in that it has a star shape in plan. Siebreiniger nach Anspruch 8, dadurch gekennzeichnet, daß er als dreiarmiger Stern ausgebildet ist.Screen cleaner according to claim 8, characterized in that it is designed as a three-armed star. Siebreiniger nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß er in einem wellgitterfreien Siebrahmen in Kombination zur Reinigung der Siebbespannung und zur Aufräumung des glatten Bodens durch eine freie kippelnde Wanderbewegung einsetzbar ist.Screen cleaner according to one of claims 1 to 9, characterized in that it can be used in a screen frame free of corrugated mesh in combination for cleaning the screen covering and for clearing up the smooth floor by a free tilting traveling movement. Siebreiniger, der frei beweglich unter der Siebbespannung (24) in den Siebrahmen (14) eines Plansichters einlegbar ist und einen stielartigen Fuß (62) aufweist, mit dem er sich kippbar mittelbar oder unmittelbar auf dem glatten Siebboden (36) abstützt, dadurch gekennzeichnet, daß der Siebreiniger (58;60) auskragende Arme (70) aus elastischem Material aufweist.Screen cleaner, which can be freely moved under the screen covering (24) in the screen frame (14) of a plan sifter and has a stick-like foot (62) with which it can be tiltably or indirectly supported on the smooth screen bottom (36), characterized in that that the screen cleaner (58; 60) has cantilevered arms (70) made of elastic material. Siebreiniger nach Anspruch 11, dadurch gekennzeichnet, daß er die Form eines dreiarmigen Sterns aufweist.Screen cleaner according to claim 11, characterized in that it has the shape of a three-armed star. Siebreiniger nach Anspruch 11 oder 12, dadurch gekennzeichnet, daß die Dicke der Arme (70) so bemessen ist, daß diese Arme bei vertikaler Auslenkung ein weicheres Federungsverhalten aufweisen als bei horizontaler Auslenkung.Screen cleaner according to claim 11 or 12, characterized in that the thickness of the arms (70) is dimensioned such that these arms have a softer suspension behavior with vertical deflection than with horizontal deflection. Siebreiniger nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, daß er mit einem Bodenausräumer (64) kombiniert ist.Screen cleaner according to one of claims 10 to 13, characterized in that it is combined with a floor scraper (64). Plansichter, gekennzeichnet durch durch Siebreiniger nach einem der vorstehenden Ansprüche.Plansifter, characterized by a screen cleaner according to one of the preceding claims.
EP92118340A 1988-01-30 1989-01-30 Sieve-cleaning device, in particular for plansifter Expired - Lifetime EP0536803B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3802799 1988-01-30
DE3802799A DE3802799A1 (en) 1988-01-30 1988-01-30 SCHEDULER
EP89101573A EP0330846A3 (en) 1988-01-30 1989-01-30 Plansifter

Related Parent Applications (2)

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EP89101573.7 Division 1989-01-30
EP89101573A Division EP0330846A3 (en) 1988-01-30 1989-01-30 Plansifter

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EP0536803A1 true EP0536803A1 (en) 1993-04-14
EP0536803B1 EP0536803B1 (en) 1995-08-30

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EP89101573A Withdrawn EP0330846A3 (en) 1988-01-30 1989-01-30 Plansifter
EP92118340A Expired - Lifetime EP0536803B1 (en) 1988-01-30 1989-01-30 Sieve-cleaning device, in particular for plansifter

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Application Number Title Priority Date Filing Date
EP89101573A Withdrawn EP0330846A3 (en) 1988-01-30 1989-01-30 Plansifter

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EP (2) EP0330846A3 (en)
AT (1) ATE127043T1 (en)
DE (2) DE8816420U1 (en)
ES (1) ES2078624T3 (en)

Cited By (4)

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EP0919293A1 (en) * 1997-11-29 1999-06-02 Reinhard Rüter Sieve cleaner for plansifter
EP0962262A2 (en) * 1998-06-04 1999-12-08 Filip GmbH Müllereibürsten Device for cleaning the frame and the bottom of a screen
EP1078697A1 (en) * 1999-08-18 2001-02-28 ALLGAIER WERKE GmbH Screen bottom for circular screen
US10335831B2 (en) 2014-10-24 2019-07-02 Bühler AG Sieve cleaners, sieve unit, and methods

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CH685604A5 (en) 1992-02-29 1995-08-31 Buehler Ag Plansifter.
TR199802567T2 (en) 1996-08-20 1999-05-21 Bhler Ag D�z Kalbur Tertibat�
DE19706601C1 (en) * 1997-02-20 1998-11-12 Buehler Ag Screen frame for plansifter and process for its production
DE10105647A1 (en) * 2001-01-19 2002-07-25 Buehler Ag Sieve and method for producing sieves
EP2465616B1 (en) 2010-12-15 2013-11-06 Sefar AG Filter cleaner for plansifter
KR101571955B1 (en) * 2014-01-27 2015-11-25 장상국 Grain sorting device for horizontal and vertical vibration
CN112938019B (en) * 2021-04-06 2022-07-12 江西诺泰生物科技有限公司 Detachable dog-house edulcoration device of solid beverage packagine machine
EP4197655A1 (en) 2021-12-20 2023-06-21 Bühler AG Sieve and frame with improved connectability

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EP0919293A1 (en) * 1997-11-29 1999-06-02 Reinhard Rüter Sieve cleaner for plansifter
WO1999028053A1 (en) * 1997-11-29 1999-06-10 Bühler AG Sieve cleaner for a plansifter
US6336557B1 (en) 1997-11-29 2002-01-08 Buhler Ag Sieve cleaner for a plansifter
EP0962262A2 (en) * 1998-06-04 1999-12-08 Filip GmbH Müllereibürsten Device for cleaning the frame and the bottom of a screen
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EP1078697A1 (en) * 1999-08-18 2001-02-28 ALLGAIER WERKE GmbH Screen bottom for circular screen
US6364118B1 (en) 1999-08-18 2002-04-02 Allgaier Werke Gmbh Sieve insert for a cylinder sieve machine
US10335831B2 (en) 2014-10-24 2019-07-02 Bühler AG Sieve cleaners, sieve unit, and methods

Also Published As

Publication number Publication date
DE3802799A1 (en) 1989-08-10
DE3802799C2 (en) 1989-12-21
EP0330846A3 (en) 1990-06-27
ES2078624T3 (en) 1995-12-16
EP0536803B1 (en) 1995-08-30
EP0330846A2 (en) 1989-09-06
ATE127043T1 (en) 1995-09-15
DE8816420U1 (en) 1989-08-10

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