EP2633924B1 - Flip-flow screen - Google Patents

Flip-flow screen Download PDF

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Publication number
EP2633924B1
EP2633924B1 EP12197440.6A EP12197440A EP2633924B1 EP 2633924 B1 EP2633924 B1 EP 2633924B1 EP 12197440 A EP12197440 A EP 12197440A EP 2633924 B1 EP2633924 B1 EP 2633924B1
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Prior art keywords
frame
movable
crossbars
crossbar
screen
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EP12197440.6A
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German (de)
French (fr)
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EP2633924A1 (en
Inventor
Christian Karl
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IFE Aufbereitungstechnik GmbH
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IFE Aufbereitungstechnik GmbH
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Priority to SI201230639A priority Critical patent/SI2633924T1/en
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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
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling 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
    • B07B1/48—Stretching devices for screens
    • B07B1/485—Devices for alternately stretching and sagging screening surfaces

Definitions

  • the invention relates to a tensioning wave according to the preamble of claim 1, as shown in DE 34 11 719 known.
  • This document discloses a tensioning wave with obliquely to the vertical extending screen surface, in which each second cross bar is placed in approximately linear back-forth movement to alternately tension and flatten its adjacent flexible or elastic screen elements so as to prevent clogging and to move the estate.
  • This reciprocating motion is achieved by attaching the movable transverse rods to pendulums which are mounted above the screen lining and are provided with an additional mass below the screen lining so that they are in the Vibrations of the screen box get into commotion and thus effect the intended movement of the cross bars.
  • the invention thus has the goal to provide a simple and robust Spannwellensiebmaschine, which should also be easily adaptable to different Siebsituationen at least in one embodiment.
  • the movable transverse rods are arranged below the screen surface and resilient, either by torsion springs or by storage in rubber bearings, which also the restoring moments deliver, brought into a rest position, axis of rotation and center of gravity do not coincide (more precisely, instantaneous axis of rotation ⁇ main axis of inertia), this can be achieved by matching geometry.
  • the transverse rods have at least one radial arm on which an eccentric mass is provided, preferably the arm is provided on one of the ends of the transverse rods lying outside the frame.
  • eccentric masses are provided on both sides symmetrical to Siebstoffebene.
  • each cross bar forms according to its storage and its eccentric mass with the frame a resilient two-mass system and thus induced tilting movement of the movable cross bars is the Clamping and bulking motion as in conventional two-frame systems.
  • This tilting movement is reinforced by the correct choice of the spring properties, so that the natural frequency of the movable crossbar system is close to the drive frequency of the screening machine.
  • the storage of the movable cross bars can be done either in conventional shaft bearings (bearings or roller bearings) and the rest position is, for example, ensured by torsion springs, or it can be the storage in rubber bearings or the like. carried out, which apply the restoring force and also give a compliance in the direction of sifting and normal, which reduces impact load of the frame and the crossbar.
  • FIG. 1 a side perspective view of an inventively designed sieve with partially broken away side wall and the Fig. 2 the end of a crossbar together with its bearing in perspective view.
  • the Fig. 1 shows an inventively designed clamping wave in a horizontal arrangement.
  • a Siebbelag 3 is at the upper ends of movable transverse rods 1 and fixed transverse rods 12, which are arranged alternately in a frame 13 on the side walls 8, attached.
  • the frame 13 and thus the screen surface are suitably arranged obliquely during operation, wherein the bars 1, 12 extend horizontally.
  • the Fig. 2 shows the end of an inventively designed transverse bar 1 a Spannwellsiebmaschine.
  • a screen cover 2 is suitably fixed, this can be done by screwing, plugging into corresponding recesses of the transverse bar 1 or by other fastening means which are known in the art.
  • the screen covering 2 consists of individual elements which extend from transverse bar to transverse bar, as indicated by the continuous line 3 in the region of the transverse bar 1.
  • the crossbar 1 is rotatably mounted eccentrically by a pivot bearing 7 in the side cheek 8 of the screen frame, ie the center of gravity 6 (and thus each of the main axes of inertia of the transverse bar, but only that which is practically parallel to the axis of rotation 5) is significant, the cross bar is at a distance from the axis of rotation 5. Furthermore, by Attaching additional masses 11, the distance of the center of gravity 6 changed by the axis of rotation 5 and thus the natural frequency of the transverse bar 1 are changed.
  • the additional masses 11 can be mounted directly on the transverse bar 1 or by means of a lever 10 elsewhere in the system. Due to the better accessibility here, as is usually preferred, the attachment outside.
  • the eccentric mass 11 is not formed in one piece, but consists of a plurality of individual discs, which makes it possible to easily and quickly change the size of this mass and thus adapt to the particular circumstances. Also, it is not necessary that the eccentric mass having the illustrated cylindrical shape and it can be provided that the lever arm, the distance between the center of gravity of the eccentric mass 10 and the axis of rotation 5 is adjustable. A further embodiment of the eccentric displacement can also be done by tabs 4, by lever or other suitable way. Another embodiment is a central attachment of the transverse rod 1 to the axis of rotation 5, wherein by attaching additional masses 11 at a distance from the axis of rotation 5 of the center of gravity 6 is displaced from the axis of rotation.
  • the transverse bar 1 when rotated about the axis 5, as indicated by the double arrow 9, in its upper region, in which it is connected to the Siebbelag 2, performs a substantially linear reciprocating movements, whereby the Siebbelag 2 to the right or to the left of the transverse bar 1 alternately bagged and stretched.
  • the cross bar 1 performs a bow movement around a frame-fixed axis of rotation with correspondingly fixed support; when stored by means of rubber blocks or the like, only an approximately arcuate movement.
  • the side wall 8 of the screening device is suitably set in vibration, to a variety of devices are known in the art. It can take place this vibration parallel or obliquely to the plane of Siebbelages 2, if it is a linear Oscillation is, but it can also be a circular oscillation or elliptical vibration by eccentric or crankshafts, etc. are introduced against the foundation.
  • the storage of the transverse bar 1 in the side cheek 8 does not have to be done via a classic pivot bearing, but can also be realized for example by a storage in rubber blocks.
  • the rubber blocks take over both the restoring force and the restoring moment in a rotational sense about the axis of rotation 5 as well as a certain flexibility in both the vertical and in the horizontal direction (equivalent to the compliance in the direction normal to the axis 5 and parallel to the screen plane 2 and both normal to the axis 5 and to the screen plane 2 and along the axis 5); whereby by appropriate choice of the geometry or the composition of the rubber bearing and anisotropic spring characteristics are possible.
  • the screening device is extremely reduced in mass and volume, it is also possible with only one drive - possibly per side cheek - for the entire screen to find the Aus GmbH and by the good accessibility of the eccentric masses, it is easily possible to achieve an adaptation to the respective screening conditions.
  • the invention is not limited to the illustrated and discussed embodiment, but may be variously modified.
  • the radial arm 10 and the tabs 4 point in the same direction, this may be provided differently than shown in particular in very steeply placed screen coverings 2.
  • the radial arms can also be arranged inside the screen frame and thus "behind" the side wall 8, in particular in this opposite arrangement, which in particular facilitates the possibility of an enclosure, although the change of dynamic eccentricity is made more difficult because below the screen lining and inside the screen Framework must be worked.

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  • Combined Means For Separation Of Solids (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Description

Die Erfindung betrifft ein Spannwellensieb entsprechend dem Oberbegriff des Anspruches 1, wie aus der DE 34 11 719 bekannt.The invention relates to a tensioning wave according to the preamble of claim 1, as shown in DE 34 11 719 known.

Diese Druckschrift offenbart ein Spannwellensieb mit schräg zur Vertikalen verlaufender Siebfläche, bei dem jeder zweite Querstab in angenähert lineare hin-her Bewegung versetzt wird, um die ihm benachbarten, biegsamen bzw. elastischen Siebelemente abwechselnd zu spannen und zu bauschen um so das Verstopfen zu verhindern und das Gut zu bewegen. Diese hin-her gehende Bewegung, eigentlich eine Bewegung entlang eines Abschnittes eines Kreisbogens, wird dadurch erzielt, dass die beweglichen Querstäbe an Pendeln befestigt sind, die oberhalb des Siebbelags gelagert sind und unterhalb des Siebbelags mit einer zusätzlichen Masse versehen sind, sodass sie bei den Schwingungen des Siebkastens ins Pendeln geraten und so die beabsichtigte Bewegung der Querstäbe bewirken.This document discloses a tensioning wave with obliquely to the vertical extending screen surface, in which each second cross bar is placed in approximately linear back-forth movement to alternately tension and flatten its adjacent flexible or elastic screen elements so as to prevent clogging and to move the estate. This reciprocating motion, actually a movement along a section of a circular arc, is achieved by attaching the movable transverse rods to pendulums which are mounted above the screen lining and are provided with an additional mass below the screen lining so that they are in the Vibrations of the screen box get into commotion and thus effect the intended movement of the cross bars.

Wegen der aufwendigen Konstruktion, der asymmetrischen Lage bezüglich des schrägen Siebes, der damit bedingten Begrenzung der Schräglage und der Schmutz- und Störanfälligkeit zufolge eingeklemmten Gutes und der fehlenden Möglichkeit, mehrere Siebdecks übereinander anzubringen, hat sich dieses Sieb nicht durchgesetzt.Because of the complex construction, the asymmetric position with respect to the oblique sieve, the consequent limitation of the inclination and the dirt and susceptibility to jammed goods and the lack of ability to install several sieve decks on top of each other, this sieve has not prevailed.

Eine Weiterentwicklung des Siebes der vorgenannten Druckschrift ist in der EP 197 191 beschrieben, bei der die beweglichen Querstäbe normal zur Siebebene beweglich gelagert sind, mittels Federn im Ruhezustand an vorgegebener Stelle gehalten werden und durch die Bewegung des Siebkastens in etwa lineare Bewegung versetzt werden. Durch diese Maßnahme erfolgt das Spannen und Bauschen des Siebbelags simultan stets in beiden Siebfeldern symmetrisch zu den beweglichen Querstäben, was für die Förderung des Siebgutes nicht günstig ist. Durch die Bewegung der Querstäbe normal zur Siebebene kommt es zu äußerst geringen Reinigungsleistung im Siebbelag, vermutlich weil kein richtiges Bauschen erfolgt, da die Bewegung des beweglichen Querstabes dies nicht zulässt. In einer Variante werden die beweglichen Querstäbe einzeln angetrieben. Diese Vorrichtung hat sich in der Praxis nicht bewährt und ist dort nicht zu finden.A further development of the screen of the aforementioned document is in the EP 197 191 described, in which the movable transverse rods are mounted to be movable normal to the plane of the sieve, are held by means of springs at rest at a predetermined position and are offset by the movement of the sieve box in approximately linear movement. By this measure, the tensioning and bulging of Siebbelags always takes place simultaneously in both screen fields symmetrical to the movable transverse bars, which is not favorable for the promotion of the screenings. The movement of the transverse rods normal to the screen level results in extremely low cleaning performance in the screen lining, presumably because no proper bulging takes place since the movement of the movable transverse rod does not permit this. In one variant, the movable cross bars are driven individually. This device has not been proven in practice and is not found there.

Aus der DE 2 108 924 ist ein Sieb bekannt, bei dem alle Querträger drehbar im Siebrahmen gelagert sind und mittels eines Drehkurbelantriebs jeweils abwechselnd über zwei Längsstangen um ihre Ruhelage gegengleich verschwenkt werden, wodurch der Siebbelag zwischen den Querträgern abwechselnd gestaucht und gestrafft wird. Es stellt dieses zwangsgeführte Sieb, dynamisch gesehen, den Gegenpol zum eingangs genannten Sieb gemäß der DE 34 11 719 dar. Wegen seiner Zwangsführung ist es so gut wie unmöglich, die Straffung des Siebbelags auf Dauer (Dehnung im Laufe der Zeit und abhängig von der Temperatur, etc.) im Richtigen Bereich zu halten, so stark, dass er gereinigt wird, so schwach, dass er nicht zerstört wird; und hat sich daher nicht durchgesetzt.From the DE 2 108 924 a sieve is known in which all cross members are rotatably mounted in the screen frame and are pivoted by means of a rotary crank drive in each case alternately over two longitudinal rods about their rest position gegengleich, whereby the Siebbelag between the cross members is alternately compressed and tightened. It represents this positively driven sieve, seen dynamically, the opposite pole to the aforementioned sieve according to the DE 34 11 719 Because of its constraint, it is virtually impossible to keep the firming of the screen covering in the right area (stretching over time and depending on the temperature, etc.) so strong that it is cleaned so weakly, that he is not destroyed; and therefore has not prevailed.

Aus der EP 1 228 814 ist eine äußerst komplex aufgebaute Siebmaschine bekannt, bei der die Komplexität bewusst in Kauf genommen wurde um sie voll einhausbar ausgestalten zu können. Bei dieser Siebmaschine ist der Siebbelag auf Längsstäben, die entlang der Falllinie verlaufen, angeordnet, die wiederum kippbar auf Querstreben montiert sind, wobei sie durch Federelemente in einer Ruhelage gehalten werden. Der Antrieb erfolgt als Unwuchtantrieb auf den Rahmen, die Drehachse des Unwuchtantriebs liegt parallel zu den Querträgern, dennoch kommt es in den Lagern der Längsträger durch dort vorgesehene exzentrische Massen dazu, dass diese Längsträger die vorgesehene Kippbewegung ausführen und so die Streckung bzw. Bauschung des Siebbelages von Querwand zu Querwand bewirken. Interessant ist, dass prinzipiell vorgesehen ist, jeden Längsträger kippbar auszubilden und dass nur in einer Ausgestaltung zusätzliche, nicht näher beschriebene, unbewegliche Hilfsträger vorgesehen sind.From the EP 1 228 814 is a very complex screening machine known, in which the complexity was deliberately accepted in order to make them fully einhausbar. In this screening machine of Siebbelag is arranged on longitudinal bars which extend along the fall line, which in turn are mounted tiltably on cross struts, being held by spring elements in a rest position. The drive takes place as an imbalance drive on the frame, the axis of rotation of the imbalance drive is parallel to the cross members, yet it comes in the camps of the longitudinal beams by eccentric masses provided there cause that these longitudinal members perform the intended tilting movement and thus the stretching or bulk of Siebbelages effect from transverse wall to transverse wall. It is interesting that it is provided in principle to make each longitudinal member tiltable and that only in one embodiment, additional, unspecified, immobile subcarriers are provided.

Diese Vorrichtung ist extrem aufwendig und letztlich auch fragil, vermutlich nur wegen der Möglichkeit, eine solche Siebvorrichtung gut einhausen zu können, ist dieser Aufwand bei verschiedenen Siebvorgängen vertretbar.This device is extremely expensive and ultimately fragile, probably only because of the ability to einhausen such a sieve well, this effort in various screening operations is justifiable.

Die Erfindung hat somit das Ziel eine einfache und robuste Spannwellensiebmaschine anzugeben, die zumindest in einer Ausgestaltung auch leicht auf unterschiedliche Siebsituationen anpassbar sein soll.The invention thus has the goal to provide a simple and robust Spannwellensiebmaschine, which should also be easily adaptable to different Siebsituationen at least in one embodiment.

Erfindungsgemäß werden diese Ziele durch die im kennzeichnenden Teil des Anspruches 1 angegebenen Merkmale erreicht. Mit anderen Worten, es werden die beweglichen Querstäbe unterhalb der Siebfläche angeordnet und federnd, entweder durch Torsionsfedern oder durch Lagerung in Kautschuklagern, die auch die Rückstellmomente liefern, in eine Ruhelage gebracht, Drehachse und Schwerpunkt fallen nicht zusammen (genauer: momentane Drehachse ≠ Hauptträgheitsachse), dies kann durch passende Geometrie erreicht werden.According to the invention, these objects are achieved by the features stated in the characterizing part of claim 1. In other words, the movable transverse rods are arranged below the screen surface and resilient, either by torsion springs or by storage in rubber bearings, which also the restoring moments deliver, brought into a rest position, axis of rotation and center of gravity do not coincide (more precisely, instantaneous axis of rotation ≠ main axis of inertia), this can be achieved by matching geometry.

Dadurch entsteht ein schwingfähiges System, ohne dass die beweglichen Querstäbe eines eigenen Antriebs bedürfen. Durch die Anordnung unterhalb der Siebfläche sind die beweglichen Querstäbe hervorragend gegen Verschmutzung und Beschädigung geschützt.This creates a vibratory system without the need for the movable cross bars of its own drive. Due to the arrangement below the screen surface, the movable cross bars are perfectly protected against dirt and damage.

In einer Ausgestaltung verfügen die Querstäbe zumindest über einen radialen Arm, auf dem eine Exzentermasse vorgesehen ist, bevorzugt ist der Arm an einem der außerhalb des Rahmens liegenden Enden der Querstäbe vorgesehen. Besonders bevorzugt sind derartige Exzentermassen beidseits symmetrisch zur Siebmittelebene vorgesehen.In one embodiment, the transverse rods have at least one radial arm on which an eccentric mass is provided, preferably the arm is provided on one of the ends of the transverse rods lying outside the frame. Particularly preferred such eccentric masses are provided on both sides symmetrical to Siebmittelebene.

Wenn nun bei einem solchen Sieb der Rahmen in Schwingung versetzt wird, sei es in lineare Schwingungen oder in kreisförmige Schwingungen, so bildet jeder Querstab zufolge seiner Lagerung und seiner Exzentermasse mit dem Rahmen ein federndes Zweimassensystem und durch die so induzierte Kippbewegung der beweglichen Querstäbe erfolgt die Spann- und Bauschbewegung wie bei herkömmlichen Zweirahmensystemen.If now in such a sieve of the frame is set in vibration, be it in linear vibrations or in circular oscillations, each cross bar forms according to its storage and its eccentric mass with the frame a resilient two-mass system and thus induced tilting movement of the movable cross bars is the Clamping and bulking motion as in conventional two-frame systems.

Verstärkt wird diese Kippbewegung durch die richtige Wahl der Federeigenschaften, so dass die Eigenfrequenz des beweglichen Querstab-Systems nahe der Antriebsfrequenz der Siebmaschine liegt.This tilting movement is reinforced by the correct choice of the spring properties, so that the natural frequency of the movable crossbar system is close to the drive frequency of the screening machine.

Die Lagerung der beweglichen Querstäbe kann entweder in üblichen Wellenlagern (Gleitlager oder Rollenlager) erfolgen und die Ruhelage wird, zum Beispiel durch Torsionsfedern sichergestellt, oder aber es kann die Lagerung in Kautschuklagern odgl. erfolgen, die die Rückstellkraft aufbringen und auch eine Nachgiebigkeit in der Siebrichtung und normal dazu verleihen, was stoßende Belastung des Rahmens und des Querstabes verringert.The storage of the movable cross bars can be done either in conventional shaft bearings (bearings or roller bearings) and the rest position is, for example, ensured by torsion springs, or it can be the storage in rubber bearings or the like. carried out, which apply the restoring force and also give a compliance in the direction of sifting and normal, which reduces impact load of the frame and the crossbar.

Die Erfindung wird im Folgenden anhand der Zeichnung näher erläutert. Dabei zeigt
die Fig. 1 eine perspektivische Seitenansicht eines erfindungsgemäß ausgebildeten Siebes mit zum Teil weg gebrochener Seitenwand und
die Fig. 2 das Ende eines Querstabes samt seinem Lager in perspektivischer Ansicht.The invention will be explained in more detail below with reference to the drawing. It shows
the Fig. 1 a side perspective view of an inventively designed sieve with partially broken away side wall and
the Fig. 2 the end of a crossbar together with its bearing in perspective view.

Die Fig. 1 zeigt ein erfindungsgemäß ausgebildetes Spannwellensieb in horizontaler Anordnung. Ein Siebbelag 3 ist an den oberen Enden von beweglichen Querstäben 1 und festen Querstäben 12, die abwechselnd in einem Rahmen 13 an dessen Seitenwangen 8 angeordnet sind, befestigt. Der Rahmen 13 und damit die Siebfläche sind während des Betriebs passenderweise Schräg angeordnet, wobei die Stäbe 1, 12 horizontal verlaufen.The Fig. 1 shows an inventively designed clamping wave in a horizontal arrangement. A Siebbelag 3 is at the upper ends of movable transverse rods 1 and fixed transverse rods 12, which are arranged alternately in a frame 13 on the side walls 8, attached. The frame 13 and thus the screen surface are suitably arranged obliquely during operation, wherein the bars 1, 12 extend horizontally.

Die Fig. 2 zeigt das Ende eines erfindungsgemäß ausgebildeten Querstabes 1 einer Spannwellsiebmaschine. Am oberen Rand des Querstabes 1 ist ein Siebbelag 2 passend befestigt, dies kann durch Anschrauben, Einstecken in entsprechende Ausnehmungen des Querstabes 1 oder durch andere Befestigungsmittel, die im Stand der Technik bekannt sind, erfolgen. Zumeist besteht der Siebbelag 2 aus einzelnen Elementen, die von Querstab zu Querstab reichen, wie es durch die durchgehende Linie 3 im Bereich des Querstabs 1 angedeutet ist.The Fig. 2 shows the end of an inventively designed transverse bar 1 a Spannwellsiebmaschine. At the upper edge of the transverse bar 1, a screen cover 2 is suitably fixed, this can be done by screwing, plugging into corresponding recesses of the transverse bar 1 or by other fastening means which are known in the art. In most cases, the screen covering 2 consists of individual elements which extend from transverse bar to transverse bar, as indicated by the continuous line 3 in the region of the transverse bar 1.

Der Querstab 1 ist exzentrisch durch ein Drehlager 7 in der Seitenwange 8 des Siebrahmens drehbar gelagert, d.h. der Schwerpunkt 6 (und damit jede der Hauptträgheitsachsen des Querstabes, bedeutsam ist aber nur die, die praktisch parallel zur Drehachse 5 verläuft) des Querstabs liegt im Abstand von der Drehachse 5. Weiters kann durch Anbringen von Zusatzmassen 11 der Abstand des Schwerpunktes 6 von der Drehachse 5 verändert und damit die Eigenfrequenz des Querstabes 1 verändert werden. Die Zusatzmassen 11 können direkt am Querstab 1 angebracht werden oder mittels eines Hebels 10 an anderer Stelle des Systems. Auf Grund der besseren Zugänglichkeit wird hier, wie zumeist, die Anbringung außen bevorzugt.The crossbar 1 is rotatably mounted eccentrically by a pivot bearing 7 in the side cheek 8 of the screen frame, ie the center of gravity 6 (and thus each of the main axes of inertia of the transverse bar, but only that which is practically parallel to the axis of rotation 5) is significant, the cross bar is at a distance from the axis of rotation 5. Furthermore, by Attaching additional masses 11, the distance of the center of gravity 6 changed by the axis of rotation 5 and thus the natural frequency of the transverse bar 1 are changed. The additional masses 11 can be mounted directly on the transverse bar 1 or by means of a lever 10 elsewhere in the system. Due to the better accessibility here, as is usually preferred, the attachment outside.

Wie in der Figur angedeutet, ist die Exzentermasse 11 nicht einstückig ausgebildet, sondern besteht aus einer Mehrzahl von einzelnen Scheiben, was es ermöglicht, die Größe dieser Masse leicht und schnell zu verändern und so an die jeweiligen Gegebenheiten anzupassen. Auch ist es nicht notwendig, dass die Exzentermasse die dargestellte zylindrische Form aufweist und es kann vorgesehen sein, dass der Hebelsarm, der Abstand zwischen dem Schwerpunkt der Exzentermasse 10 und der Drehachse 5 verstellbar ausgebildet ist. Eine weitere Ausführung der exzentrischen Verlagerung kann auch durch Laschen 4, durch Hebel oder auf andere geeignete Art erfolgen. Eine wieder andere Ausführungsmöglichkeit ist eine zentrische Anbringung des Querstabes 1 zur Drehachse 5, wobei durch Anbringung von Zusatzmassen 11 in einem Abstand zur Drehachse 5 der Schwerpunkt 6 aus der Drehachse verschoben wird.As indicated in the figure, the eccentric mass 11 is not formed in one piece, but consists of a plurality of individual discs, which makes it possible to easily and quickly change the size of this mass and thus adapt to the particular circumstances. Also, it is not necessary that the eccentric mass having the illustrated cylindrical shape and it can be provided that the lever arm, the distance between the center of gravity of the eccentric mass 10 and the axis of rotation 5 is adjustable. A further embodiment of the eccentric displacement can also be done by tabs 4, by lever or other suitable way. Another embodiment is a central attachment of the transverse rod 1 to the axis of rotation 5, wherein by attaching additional masses 11 at a distance from the axis of rotation 5 of the center of gravity 6 is displaced from the axis of rotation.

Es ist offensichtlich, dass der Querstab 1 bei Verdrehung um die Achse 5, wie durch den Doppelpfeil 9 angedeutet, in seinem oberen Bereich, in dem er mit dem Siebbelag 2 verbunden ist, eine im wesentlichen lineare hin-her gehende Bewegungen vollführt, wodurch der Siebbelag 2 zur Rechten bzw. zur Linken des Querstabes 1 abwechselnd gebauscht und gespannt wird. Genau genommen vollführt der Querstab 1 bei entsprechend fester Lagerung eine Bogenbewegung um eine rahmenfeste Drehachse; bei Lagerung mittels Kautschukblöcken oder ähnlichem eine nur annähernd bogenförmige Bewegung. Aus diesem Grund wurde weiter oben von der "Momentandrehachse" gesprochen, in realitas liegen alle diese Momentandrehachsen maximal einige Millimeter voneinander, entsprechend der maximalen linearen Auslenkung der Kautschuklage in einer Ebene parallel zur Seitenwange 8.It is obvious that the transverse bar 1 when rotated about the axis 5, as indicated by the double arrow 9, in its upper region, in which it is connected to the Siebbelag 2, performs a substantially linear reciprocating movements, whereby the Siebbelag 2 to the right or to the left of the transverse bar 1 alternately bagged and stretched. Strictly speaking, the cross bar 1 performs a bow movement around a frame-fixed axis of rotation with correspondingly fixed support; when stored by means of rubber blocks or the like, only an approximately arcuate movement. For this reason, the "instantaneous rotational axis" was spoken above, in realitas all these instantaneous rotational axes are at most a few millimeters apart, corresponding to the maximum linear deflection of the rubber layer in a plane parallel to the side cheek 8.

Die Seitenwange 8 der Siebvorrichtung wird passend in Schwingung versetzt, dazu sind im Stand der Technik die verschiedensten Vorrichtungen bekannt. Es kann diese Schwingung parallel oder schräg zur Ebene des Siebbelages 2 erfolgen, wenn es sich um eine lineare Schwingung handelt, es kann aber auch eine Kreisschwingung oder elliptische Schwingung durch Exzenter- oder Kurbelwellen, etc. gegenüber dem Fundament eingeleitet werden. Völlig unabhängig von der Art der Schwingung und der Art der Einleitung der Schwingung auf die Siebvorrichtung und damit auf die Seitenwange 8 bildet die Gesamtmasse, die fest (soweit dies technisch möglich ist sogar starr) mit der Seitenwange 8 verbunden ist, über die Lagerung im Drehlager 7 mit ihrer Drehbarkeit um die Achse 5 und die Exzentermasse 11 ein 2-Massen-Schwingsystem, bei dem das Querstabsystem in seiner Gesamtheit, somit der Querstab 1, die Lasche 4, die Drehlager 7, der radiale Arm 10 und die Exzentermasse 11, sowie gegebenenfalls ein entsprechender Arm samt Exzentermasse auf der Gegenseite, in Schwingung versetzt werden. Durch diese Schwingung und die so induzierte hin-her Bewegung des Querstabs 1 um die Achse 5 erfolgt das angestrebte abwechselnde Spannen und Bauschen des Siebbelags 2.The side wall 8 of the screening device is suitably set in vibration, to a variety of devices are known in the art. It can take place this vibration parallel or obliquely to the plane of Siebbelages 2, if it is a linear Oscillation is, but it can also be a circular oscillation or elliptical vibration by eccentric or crankshafts, etc. are introduced against the foundation. Completely independent of the type of vibration and the nature of the initiation of the vibration on the screening device and thus on the side wall 8, the total mass, the fixed (as far as this is technically possible even rigid) is connected to the side wall 8, about the bearing in the pivot bearing 7 with its rotation about the axis 5 and the eccentric mass 11, a 2-mass vibration system in which the cross bar system in its entirety, thus the cross bar 1, the tab 4, the pivot bearing 7, the radial arm 10 and the eccentric mass 11, and if necessary, a corresponding arm including eccentric mass on the opposite side, be set in vibration. By this oscillation and the thus induced back-movement of the cross bar 1 about the axis 5, the desired alternating clamping and bulging of the Siebbelags second

Wie bereits eingangs erwähnt, muss die Lagerung des Querstabes 1 in der Seitenwange 8 nicht über ein klassisches Drehlager erfolgen, sondern kann beispielsweise auch durch eine Lagerung in Kautschukblöcken verwirklicht sein. Dabei übernehmen die Kautschukblöcke sowohl die Rückstellkraft bzw. das Rückstellmoment im rotatorischen Sinn um die Drehachse 5 als auch eine gewisse Nachgiebigkeit sowohl in vertikaler als auch in horizontaler Richtung (gleichbedeutend mit der Nachgiebigkeit in der Richtung normal auf die Achse 5 und parallel zur Siebebene 2 und sowohl normal auf die Achse 5 als auch auf die Siebebene 2 und entlang der Achse 5); wobei durch entsprechende Wahl der Geometrie bzw. der Zusammensetzung der Gummilager auch anisotrope Federcharakteristiken möglich sind.As already mentioned, the storage of the transverse bar 1 in the side cheek 8 does not have to be done via a classic pivot bearing, but can also be realized for example by a storage in rubber blocks. The rubber blocks take over both the restoring force and the restoring moment in a rotational sense about the axis of rotation 5 as well as a certain flexibility in both the vertical and in the horizontal direction (equivalent to the compliance in the direction normal to the axis 5 and parallel to the screen plane 2 and both normal to the axis 5 and to the screen plane 2 and along the axis 5); whereby by appropriate choice of the geometry or the composition of the rubber bearing and anisotropic spring characteristics are possible.

Als Materialien für derartige Querstäbe samt Exzentermassen kommen alle im Siebbau bekannten Materialien in Frage, in Kenntnis der Erfindung ist es für den Fachmann ein leichtes sie entsprechend auszuwählen und zu dimensionieren. Die anderen Bestandteile entsprechen dem Stand der Technik, einschließlich der Fundamentlager und dem Antrieb und erfordern daher hier keiner näheren Erläuterung.As materials for such cross bars including eccentric masses all materials known in the sieve construction in question, in the knowledge of the invention it is easy for the expert to select and dimension them accordingly. The other components correspond to the state of the art, including the foundation bearings and the drive and therefore require no further explanation here.

Insgesamt ist der Vorteil gegenüber dem Stand der Technik durch die kompakte Ausbildung und den vollständigen Verzicht auf einen zweiten Rahmen, der mit den beweglichen Querstäben verbunden wäre und in seiner Gesamtheit gegenüber der Seitenwange 8 schwingt, gegeben, die Siebvorrichtung ist extrem an Masse und Volumen reduziert, es ist weiterhin möglich, mit nur einem Antrieb - gegebenenfalls pro Seitenwange - für das gesamte Sieb das Auslangen zu finden und durch die gute Zugänglichkeit der Exzentermassen ist es leicht möglich, eine Anpassung an die jeweiligen Siebbedingungen zu erreichen.Overall, the advantage over the prior art by the compact design and the complete abandonment of a second frame, which would be connected to the movable transverse rods and in its entirety compared to the Sidewall 8 vibrates, given, the screening device is extremely reduced in mass and volume, it is also possible with only one drive - possibly per side cheek - for the entire screen to find the Auslangen and by the good accessibility of the eccentric masses, it is easily possible to achieve an adaptation to the respective screening conditions.

Die Erfindung ist nicht auf das dargestellte und besprochene Ausführungsbeispiel beschränkt, sondern kann verschiedentlich abgewandelt werden. So ist es nicht notwendig, dass der radiale Arm 10 und die Laschen 4 in die gleiche Richtung weisen, dies kann insbesondere bei sehr steil aufgestellten Siebbelägen 2 anders als dargestellt vorgesehen sein. Es können die radialen Arme insbesondere bei dieser entgegengesetzten Anordnung auch innerhalb des Siebrahmens und somit "hinter" der Seitenwange 8 angeordnet sein, was insbesondere die Möglichkeit einer Einhausung erleichtert, wenn auch die Änderung der dynamischen Exzentrizität erschwert wird, weil unterhalb des Siebbelags und Innerhalb des Rahmens gearbeitet werden muss.The invention is not limited to the illustrated and discussed embodiment, but may be variously modified. Thus, it is not necessary that the radial arm 10 and the tabs 4 point in the same direction, this may be provided differently than shown in particular in very steeply placed screen coverings 2. The radial arms can also be arranged inside the screen frame and thus "behind" the side wall 8, in particular in this opposite arrangement, which in particular facilitates the possibility of an enclosure, although the change of dynamic eccentricity is made more difficult because below the screen lining and inside the screen Framework must be worked.

Schließlich kann, wenn auf ein einfaches ändern der dynamischen Exzentrizität kein Wert gelegt wird, diese auch durch entsprechende Ausgestaltung des Querstabes 1, mit Schwerpunkt außerhalb der Drehachse, bewirkt werden, wesentlich ist, dass durch eine federnde Kraft die Nulllage des Querstabes mit richtig positioniertem oberen Bereich sichergestellt wird.Finally, if no importance is attached to a simple change of the dynamic eccentricity, these are also caused by appropriate design of the transverse bar 1, with emphasis outside the axis of rotation, it is essential that by a resilient force, the zero position of the transverse bar with properly positioned upper Area is ensured.

Claims (4)

  1. Flip flow screen comprising screen surfaces which are at an angle relative to the vertical, comprising a frame (13) which can be caused to oscillate by means of a drive, said frame comprising side walls (8), in which crossbars (1, 12) are fastened, which crossbars support a screen lining (3), every second crossbar (1) alternately being movably mounted in the side walls (8) such that said crossbar can be moved in arc-shaped or approximately linear to and fro movements relative to the frame, and every intermediate crossbar (12) being rigidly mounted in the side walls (8), the principle axis of inertia (6) of the movable crossbars (1) having a spacing from the current rotational axis (5) of the to and fro movement and the resting rotational position of the movable crossbars (1) relative to the frame (13) being maintained by means of resilient torques, characterised in that the current rotational axis (5) is located under the screening surface (2), and in that
    either the movable crossbars (1) are pushed into the resting rotational position thereof by means of a torsion spring in the bearing region,
    or the movable crossbeams (1) are mounted in rubber bearings which provide the restyling torques for the resting rotational position.
  2. Flip flow screen according to claim 1, characterised in that the movable crossbars (1) comprise a radial arm (10) on at least one of the crossbar ends, said arm supporting an eccentric mass (11).
  3. Flip flow screen according to claim 2, characterised in that the eccentric mass consists of a plurality of individually mountable partial masses.
  4. Flip flow screen according to either claim 2 or claim 3, characterised in that the radial arm (10) is provided outside the frame (13).
EP12197440.6A 2012-02-29 2012-12-17 Flip-flow screen Active EP2633924B1 (en)

Priority Applications (1)

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SI201230639A SI2633924T1 (en) 2012-02-29 2012-12-17 Flip-flow screen

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ATA257/2012A AT511949B1 (en) 2012-02-29 2012-02-29 Spannwellensieb

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AU (1) AU2013200433A1 (en)
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Publication number Priority date Publication date Assignee Title
CN106824761B (en) * 2017-01-22 2020-09-08 安徽农业大学 Oscillating stoner
CN107042199A (en) * 2017-05-12 2017-08-15 刘云龙 A kind of concrete raw material screening installation poured into a mould for Bridge guardrail
CN110026337B (en) * 2019-05-05 2020-09-04 温州瓯厦建设有限公司 Quick sieving mechanism of granular material of building energy saving material production
CN110605236B (en) * 2019-10-21 2024-06-25 中国矿业大学(北京) Double-rocker self-balancing elastic driving type relaxation sieve
CN114506177B (en) * 2022-02-22 2023-03-31 深圳孚视科技有限公司 Hot-fix rhinestone processing equipment and technological process thereof
CN114887895B (en) * 2022-05-26 2024-01-12 临沂联承新材料科技有限公司 Granule sieving device

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DE2108924A1 (en) * 1971-02-25 1972-09-07 Wehner, Albert, 7881 Wieladingen Flexible sieve edge seal - of bellows type wall prevents edge spillage
AT384961B (en) * 1983-04-11 1988-02-10 Binder Co Ag SCREEN DEVICE
NL8403518A (en) * 1984-11-19 1986-06-16 Flow Control Service B V I O SHAKE SCREEN.
DE3512215A1 (en) * 1985-04-03 1986-10-16 Carl Schenck Ag, 6100 Darmstadt SCREENING MACHINE WITH A FLEXIBLE SCREENING
DE4101710A1 (en) * 1991-01-22 1992-07-23 Hein Lehmann Trenn Foerder SCREEN AREA FOR A SCREENING MACHINE
DE19601206C2 (en) * 1996-01-15 1998-08-20 Herhof Umwelttechnik Gmbh Method and device for separating compost or other bulk material
DE10016979C1 (en) * 2000-04-06 2001-08-30 Joest Gmbh & Co Kg Sieve device, for sifting damp or sticking material, includes vibrating frame coupled to carrier frame using torsion-rod springs
AT4530U1 (en) * 2001-02-05 2001-08-27 Binder Co Ag SCREENING MACHINE WITH MOVING SCREEN
GB0302927D0 (en) * 2003-02-08 2003-03-12 Axiom Process Ltd Screen mounting system

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AT511949A4 (en) 2013-04-15
AT511949B1 (en) 2013-04-15
BR102013004505A2 (en) 2016-02-23
EP2633924A1 (en) 2013-09-04
ES2575674T3 (en) 2016-06-30
PL2633924T3 (en) 2016-10-31
SI2633924T1 (en) 2016-08-31
AU2013200433A1 (en) 2013-09-12

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