WO2022229094A1 - Method of unclogging a screen during operation - Google Patents

Method of unclogging a screen during operation Download PDF

Info

Publication number
WO2022229094A1
WO2022229094A1 PCT/EP2022/060888 EP2022060888W WO2022229094A1 WO 2022229094 A1 WO2022229094 A1 WO 2022229094A1 EP 2022060888 W EP2022060888 W EP 2022060888W WO 2022229094 A1 WO2022229094 A1 WO 2022229094A1
Authority
WO
WIPO (PCT)
Prior art keywords
screen
cluster
clusters
clogging
screening device
Prior art date
Application number
PCT/EP2022/060888
Other languages
German (de)
French (fr)
Inventor
Guido Leuschen
Original Assignee
Thyssenkrupp Industrial Solutions Ag
Thyssenkrupp Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from BE20215343A external-priority patent/BE1029358B1/en
Priority claimed from DE102021204393.3A external-priority patent/DE102021204393B3/en
Application filed by Thyssenkrupp Industrial Solutions Ag, Thyssenkrupp Ag filed Critical Thyssenkrupp Industrial Solutions Ag
Publication of WO2022229094A1 publication Critical patent/WO2022229094A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B07B1/284—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens with unbalanced weights
    • 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
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • B07B1/44—Balancing devices
    • 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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/14—Details or accessories
    • B07B13/18—Control

Definitions

  • the invention relates to a method for controlling a screening device in order to eliminate blockages in the screen during operation.
  • Screen systems with vibration exciters arranged in groups are known from DE 10 2017 218 371 B3 and from DE 10 2018 205 997 A1.
  • This arrangement in groups enables the operation of the screening device to be highly adaptable, which is not possible with the classic linear, elliptical or circular vibrators.
  • This group of screening devices thus enables completely new control schemes.
  • DE 102019 204 845 B3 discloses a method for setting and controlling at least one vibration mode of a screening device.
  • a method for controlling and regulating a screening device is known from DE 10 2019 214 864 B3.
  • the object of the invention is to provide a method for removing blockages in a screen.
  • the method according to the invention serves to control a screening device.
  • the screening device used for the method has at least and preferably exactly four clusters of imbalance exciter units, with each cluster having at least two imbalance exciter units. Each cluster is connected via a coupling point Impingement of the screening device formed with vibrations. Two front clusters are located closer to material application and two rear clusters are located closer to coarse material discharge.
  • the material to be screened is applied to the screen of the screening device.
  • the coarse material that does not fall through the screen migrates over the screen and reaches the coarse material discharge.
  • the fine material falls through the sieve and thus reaches the fine material discharge.
  • the phase offset between the imbalance exciter units within a cluster is controlled. This enables a very variable adjustment of the screen properties and is easily possible by arranging the imbalance exciter units in clusters.
  • an indicator of the clogging of the screen is recorded as an input variable.
  • the ratio between the mass flow of the coarse material discharge and the mass flow of the fine material discharge is used as an indicator of a blockage. If the proportion of fine material discharge falls with otherwise unchanged parameters, this can be an indication that the screen is clogged.
  • a natural vibration mode of the screen is used as an indicator of a blockage. Due to the objects that clog the holes in the screen, the mass of the screen increases, so that the natural frequencies of the screen change.
  • phase shift is set to between 0° and 5°, so that the blockage is knocked out of the sieve by loading the sieve as vertically as possible. Here, most of the blockages are knocked back up out of the sieve.
  • the indicator for the blockage is then preferably determined again and, by comparing it with the value before the cleaning, it is checked whether the blockage could be cleared.
  • material is supplied via the material application with a phase offset of 0° to 5° for the time of cleaning interrupted. Since there is practically no transport of material over the screen during cleaning, the loading would otherwise increase.
  • a phase offset of 0° means that the movement of the two adjacent unbalance exciter units is exactly the mirror image of each other.
  • a phase offset deviating from 0° means that one of the unbalance exciter units leads or lags the mirror-inverted movement of the other unbalance exciter unit by the corresponding angular amount.
  • Positive values are specified in such a way that the resulting force vector points in the direction of coarse material discharge, negative values are specified in such a way that the resulting force vector points in the direction of material application.
  • a screening device 10 is shown. This has a screen 20, for example a perforated plate. Material is applied to the material order 30 and conveyed over the screen 20 . Theoretically, all components that are smaller than the size of the screen holes fall through the screen 20 and are thus brought to the fine material outlet 50 . Anything larger is conveyed over the screen 20 and to the coarse material outlet 40.
  • the screening device has eight imbalance exciter units U, which are arranged in four clusters of two imbalance exciter units U each, with two imbalance exciter units U in each cluster each having a common coupling point for acting on the screening device 10 with Vibrations are formed.
  • an oscillation that is generated by superimposition of the oscillations generated by the two unbalance exciter units U is effectively impressed on the screening device 10 .
  • the example shown is the simplest version with two unbalance exciter units U per cluster and four clusters, a front left cluster 60, a front right cluster 70, a rear cluster 80 and a rear right cluster 90.
  • the clusters can also have three or more unbalance exciter units U and, for example, two additional clusters of imbalance exciter units U can also be arranged in the middle.
  • FIGS. 2 and 3 Two modes of operation of a cluster of imbalance exciter units U are shown in FIGS. 2 and 3 .
  • the arrow inside of the unbalance exciter units U indicates the respective force vector, the arrows outside indicate the direction of rotation of the unbalance exciter units U.
  • Fig. 2 shows both force vectors vertically (relative to the plane of the screen) upwards and those of unbalance exciter units U rotate in opposite directions to each other. A phase offset is not realized (0°), the cluster excitation is thus in the vertical direction, which leads to a very small movement of material over the screen. 2 describes an operating state which can be set/controlled, for example, for a cleaning function, in particular in connection with a variation in the speed of the respective imbalance exciter unit.
  • FIG. 1 Another operating state is shown in FIG.
  • one force vector (the one on the left in the illustration) points upwards
  • the second force vector (the one on the right in the illustration) points to the left, in particular orthogonally to the first force vector.
  • the imbalance exciter units rotate in opposite directions to each other.
  • the phase shift is 90°.
  • the resulting cluster excitation acts at an angle of 45° to the florizontal and thus leads to a comparatively fast transport of material over the wire.

Abstract

The invention relates to a method for controlling a screen device (10), said screen device (10) comprising at least four clusters of imbalance excitation units (U), each cluster including at least two imbalance excitation units (U) and each cluster being formed via a coupling point to apply vibrations to the screen device (10), two front clusters being located closer to the material feed point (30), and two rear clusters being located closer to the coarse material discharge point (40) such that the phase shift between the imbalance excitation units (U) within a cluster is, wherein an input measurement variable is acquired as an indicator for clogging of the screen (20), wherein the phase shift is set to 0° to 5° in case of suspected clogging so that the clogging is knocked out of the screen (20) by impacting the screen (20) as vertically as possible.

Description

Verfahren zur Entfernung von Verstopfungen eines Siebes im laufenden Betrieb Process for unclogging a sieve on the fly
Die Erfindung betrifft ein Verfahren zur Ansteuerung einer Siebvorrichtung um im laufenden Betrieb Verstopfungen des Siebes zu beheben. The invention relates to a method for controlling a screening device in order to eliminate blockages in the screen during operation.
Aus der DE 10 2017 218 371 B3 und aus der DE 10 2018 205 997 A1 sind Siebsysteme mit gruppenweise angeordneten Schwingungsanregern bekannt. Diese gruppenweise Anordnung ermöglicht eine starke Anpassungsfähigkeit der Betriebsweise der Siebvorrichtung, welche bei den klassischen Linearschwingern, Ellipsenschwingern oder Kreisschwingern nicht möglich ist. Diese Gruppe von Siebvorrichtungen ermöglicht damit ganz neue Ansteuerschemata. Screen systems with vibration exciters arranged in groups are known from DE 10 2017 218 371 B3 and from DE 10 2018 205 997 A1. This arrangement in groups enables the operation of the screening device to be highly adaptable, which is not possible with the classic linear, elliptical or circular vibrators. This group of screening devices thus enables completely new control schemes.
Aus der DE 102019 204 845 B3 ist ein Verfahren zum Einstellen und Regeln wenigstens einer Schwingungsmode einer Siebvorrichtung bekannt. DE 102019 204 845 B3 discloses a method for setting and controlling at least one vibration mode of a screening device.
Aus der DE 10 2019 214 864 B3 ist ein Verfahren zum Ansteuern und Regeln einer Siebvorrichtung bekannt. A method for controlling and regulating a screening device is known from DE 10 2019 214 864 B3.
Wünschenswert wäre es, eine Siebvorrichtung anhand von konkreten Messgrößen, die eine Korrelation zu Edukteigenschaften aufweisen, so anpassen zu können, dass gezielt die Produkteigenschaften einstellbar sind. It would be desirable to be able to adapt a screening device based on specific measured variables that have a correlation to educt properties in such a way that the product properties can be set in a targeted manner.
Aufgabe der Erfindung ist es, ein Verfahren bereit zu stellen, um die Verstopfungen eines Siebes zu beseitigen. The object of the invention is to provide a method for removing blockages in a screen.
Gelöst wird diese Aufgabe durch das Verfahren mit den in Anspruch 1 angegebenen Merkmalen. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen, der nachfolgenden Beschreibung sowie den Zeichnungen. This problem is solved by the method with the features specified in claim 1 . Advantageous developments result from the dependent claims, the following description and the drawings.
Das erfindungsgemäße Verfahren dient zur Steuerung einer Siebvorrichtung. Die für das Verfahren verwendete Siebvorrichtung weist wenigstens und bevorzugt genau vier Cluster von Unwuchterregereinheiten aufweist, wobei jeder Cluster wenigstens zwei Unwuchterregereinheiten auf. Jeder Cluster ist jeweils über einen Kopplungspunkt zur Beaufschlagung der Siebvorrichtung mit Schwingungen ausgebildet. Zwei vordere Cluster sind näher zum Materialauftrag angeordnet und zwei hintere Cluster sind näher zum Grobmaterialaustrag angeordnet. Am Materialauftrag wird das zu siebende Material auf das Sieb der Siebvorrichtung aufgetragen. Das grobe Material, welches nicht durch das Sieb fällt, wandert über das Sieb und gelangt zum Grobmaterialaustrag. Das feine Material fällt durch das Sieb und gelangt so zum Feinmaterialaustrag. The method according to the invention serves to control a screening device. The screening device used for the method has at least and preferably exactly four clusters of imbalance exciter units, with each cluster having at least two imbalance exciter units. Each cluster is connected via a coupling point Impingement of the screening device formed with vibrations. Two front clusters are located closer to material application and two rear clusters are located closer to coarse material discharge. At the material application, the material to be screened is applied to the screen of the screening device. The coarse material that does not fall through the screen migrates over the screen and reaches the coarse material discharge. The fine material falls through the sieve and thus reaches the fine material discharge.
Erfindungsgemäß wird der Phasenversatz zwischen den Unwuchterregereinheiten innerhalb eines Clusters gesteuert. Dieses ermöglicht eine sehr variable Anpassung der Siebeigenschaften und ist durch die Anordnung von Unwuchterregereinheiten in Clustern einfach möglich. According to the invention, the phase offset between the imbalance exciter units within a cluster is controlled. This enables a very variable adjustment of the screen properties and is easily possible by arranging the imbalance exciter units in clusters.
Erfindungsgemäß wird als Eingangsmessgröße ein Indikator zur Verstopfung des Siebes erfasst. Beispielsweise wird in einer Ausführungsform als Indikator für eine Verstopfung das Verhältnis zwischen dem Massestrom des Grobmaterialaustrags zu dem Massestrom des Feinmaterialaustrags verwendet. Sinkt der Anteil des Feinmaterialaustrags bei sonst unveränderten Parametern kann dieses ein Indiz sein, dass eine Verstopfung des Siebes vorliegt. Beispielsweise wird in einer weiteren Ausführungsform als Indikator für eine Verstopfung eine Eigenschwingungsmode des Siebes verwendet. Durch die Objekte, welche die Löcher des Siebes verstopfen, steigt die Masse des Siebes, sodass sich die Eigenfrequenzen des Siebes ändern. According to the invention, an indicator of the clogging of the screen is recorded as an input variable. For example, in one embodiment, the ratio between the mass flow of the coarse material discharge and the mass flow of the fine material discharge is used as an indicator of a blockage. If the proportion of fine material discharge falls with otherwise unchanged parameters, this can be an indication that the screen is clogged. For example, in a further embodiment, a natural vibration mode of the screen is used as an indicator of a blockage. Due to the objects that clog the holes in the screen, the mass of the screen increases, so that the natural frequencies of the screen change.
Bei einer vermuteten Verstopfung wird der Phasenversatz auf 0 ° bis 5 °gesetzt, sodass durch die möglichst senkrechte Belastung des Siebes die Verstopfung aus dem Sieb geschlagen werden. Hierbei werden die meisten Verstopfungen wieder nach oben aus dem Sieb herausgeschlagen. If a blockage is suspected, the phase shift is set to between 0° and 5°, so that the blockage is knocked out of the sieve by loading the sieve as vertically as possible. Here, most of the blockages are knocked back up out of the sieve.
Vorzugsweise wird anschließend erneut der Indikator zur Verstopfung festgestellt und durch mit dem Vergleich mit dem Wert vor der Reinigung überprüft, ob die Verstopfung behoben werden konnte. The indicator for the blockage is then preferably determined again and, by comparing it with the value before the cleaning, it is checked whether the blockage could be cleared.
In einer weiteren Ausführungsform der Erfindung wird für die Zeit der Reinigung mit einem Phasenversatz auf 0 ° bis 5 ° die Zuführung von Material über den Materialauftrag unterbrochen. Da durch die Reinigung praktisch kein Materialtransport über das Sieb erfolgt, würde die Beladung ansonsten steigen. In a further embodiment of the invention, material is supplied via the material application with a phase offset of 0° to 5° for the time of cleaning interrupted. Since there is practically no transport of material over the screen during cleaning, the loading would otherwise increase.
Ein Phasenversetz von 0 ° bedeutet, dass die Bewegung der beiden benachbarten Unwuchterregereinheit exakt spiegelbildlich zueinander verläuft. Ein von 0 ° abweichender Phasenversetz bedeutet, dass einer der Unwuchterregereinheiten der spiegelbildlichen Bewegung der anderen Unwuchterregereinheit um den entsprechenden Winkelbetrag vorläuft oder nachläuft. Positive Werte sind so angegeben, dass der resultierende Kraftvektor in Richtung Grobmaterialaustrag weist, negative Werte sind so angegeben, dass der resultierende Kraftvektor in Richtung Materialauftrag weist. A phase offset of 0° means that the movement of the two adjacent unbalance exciter units is exactly the mirror image of each other. A phase offset deviating from 0° means that one of the unbalance exciter units leads or lags the mirror-inverted movement of the other unbalance exciter unit by the corresponding angular amount. Positive values are specified in such a way that the resulting force vector points in the direction of coarse material discharge, negative values are specified in such a way that the resulting force vector points in the direction of material application.
Nachfolgend ist die für das erfindungsgemäße Verfahren einzusetzende Vorrichtung anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. The device to be used for the method according to the invention is explained in more detail below with reference to an exemplary embodiment illustrated in the drawings.
Fig. 1 Vorrichtung 1 device
Fig. 2 erster Betriebszustand Fig. 2 first operating state
Fig. 3 zweiter Betriebszustand Fig. 3 second operating state
In Fig. 1 ist eine Siebvorrichtung 10 gezeigt. Diese weist ein Sieb 20, beispielsweise ein Lochblech auf. Am Materialauftrag 30 wird Material aufgegeben und über das Sieb 20 gefördert. Theoretisch fallen dabei alle Bestandteile durch das Sieb 20 hindurch, deren Größe kleiner als die Größe der Sieblöcher ist, und so zum Feinmaterialausgang 50 gebracht. Alles was größer ist wird über das Sieb 20 und zum Grobmaterialausgang 40 gefördert. In Fig. 1 a screening device 10 is shown. This has a screen 20, for example a perforated plate. Material is applied to the material order 30 and conveyed over the screen 20 . Theoretically, all components that are smaller than the size of the screen holes fall through the screen 20 and are thus brought to the fine material outlet 50 . Anything larger is conveyed over the screen 20 and to the coarse material outlet 40.
Um die Siebvorrichtung 10 und damit das Sieb 20 zu bewegen weist die Siebvorrichtung acht Unwuchterregereinheiten U auf, die in vier Clustern zu je zwei Unwuchterregereinheiten U angeordnet sind, wobei jeweils zwei Unwuchterregereinheiten U in einem Cluster jeweils über einen gemeinsamen Kopplungspunkt zur Beaufschlagung der Siebvorrichtung 10 mit Schwingungen ausgebildet sind. Hierdurch wird effektiv eine Schwingung die durch Überlagerung der durch die beiden Unwuchterregereinheiten U erzeugten Schwingungen erzeugt wird auf die Siebvorrichtung 10 aufgeprägt. Das gezeigte Beispiel ist die einfachste Ausführung mit je zwei Unwuchterregereinheiten U je Cluster und vier Clustern, einem vorderen linken Cluster 60, einen vorderen rechten Cluster 70, einen hinteren Cluster 80 und einen hinteren rechten Cluster 90. Selbstverständlich können die Cluster auch drei oder mehr Unwuchterregereinheiten U aufweisen und beispielsweise können noch zusätzlich in der Mitte zwei weitere Cluster von Unwuchterregereinheiten U angeordnet werden. In order to move the screening device 10 and thus the screen 20, the screening device has eight imbalance exciter units U, which are arranged in four clusters of two imbalance exciter units U each, with two imbalance exciter units U in each cluster each having a common coupling point for acting on the screening device 10 with Vibrations are formed. As a result, an oscillation that is generated by superimposition of the oscillations generated by the two unbalance exciter units U is effectively impressed on the screening device 10 . The example shown is the simplest version with two unbalance exciter units U per cluster and four clusters, a front left cluster 60, a front right cluster 70, a rear cluster 80 and a rear right cluster 90. Of course, the clusters can also have three or more unbalance exciter units U and, for example, two additional clusters of imbalance exciter units U can also be arranged in the middle.
In Fig. 2 und Fig. 3 sind zwei Betriebsweisen eines Clusters von Unwuchterregereinheiten U gezeigt. Der Pfeil innerhalb der von Unwuchterregereinheiten U zeigt den jeweiligen Kraftvektor an, die Pfeile außerhalb die Drehrichtung der von Unwuchterregereinheiten U. Two modes of operation of a cluster of imbalance exciter units U are shown in FIGS. 2 and 3 . The arrow inside of the unbalance exciter units U indicates the respective force vector, the arrows outside indicate the direction of rotation of the unbalance exciter units U.
Fig. 2 zeigen beide Kraftvektoren vertikal (bezogen auf die Ebene des Siebes) nach oben und die von Unwuchterregereinheiten U rotieren entgegengesetzt zueinander. Ein Phasenversatz ist nicht realisiert (0 °), die Cluster-Anregung erfolgt somit in vertikaler Richtung, was zu einer sehr geringen Materialbewegung über das Sieb führt. Fig. 2 beschreibt einen Betriebszustand, welcher beispielsweise für eine Reinigungsfunktion einstellbar/regelbar ist, insbesondere in Verbindung mit einer Variation der Drehzahl der jeweiligen Unwuchterregereinheit. Fig. 2 shows both force vectors vertically (relative to the plane of the screen) upwards and those of unbalance exciter units U rotate in opposite directions to each other. A phase offset is not realized (0°), the cluster excitation is thus in the vertical direction, which leads to a very small movement of material over the screen. 2 describes an operating state which can be set/controlled, for example, for a cleaning function, in particular in connection with a variation in the speed of the respective imbalance exciter unit.
In Fig. 3 ist ein anderer Betriebszustand gezeigt. In diesem Fall weist der eine (der in der Darstellung linke) Kraftvektor nach oben, und der zweite (der in der Darstellung rechte) Kraftvektor weist nach links, insbesondere orthogonal zum ersten Kraftvektor. Die Unwuchterregereinheiten rotieren entgegengesetzt zueinander. Der Phasenversatz beträgt im hier gezeigten Betriebszustand 90 °. Die resultierende Cluster-Anregung wirkt in einem Winkel von 45 ° gegenüber der Florizontalen und führt somit zu einem vergleichsweise schnellen Materialtransport über das Sieb. Another operating state is shown in FIG. In this case, one force vector (the one on the left in the illustration) points upwards, and the second force vector (the one on the right in the illustration) points to the left, in particular orthogonally to the first force vector. The imbalance exciter units rotate in opposite directions to each other. In the operating state shown here, the phase shift is 90°. The resulting cluster excitation acts at an angle of 45° to the florizontal and thus leads to a comparatively fast transport of material over the wire.
Bezugszeichen U Unwuchterregereinheit Reference U imbalance exciter unit
10 Siebvorrichtung 20 Sieb 30 Materialauftrag 10 sieve device 20 sieve 30 material order
40 Grobmaterialaustrag40 coarse material discharge
50 Feinmaterialaustrag50 fine material discharge
60 vorderer linker Cluster 70 vorderer rechter Cluster60 front left cluster 70 front right cluster
80 hinterer linker Cluster80 posterior left cluster
90 hinter rechter Cluster 90 behind right cluster

Claims

Patentansprüche patent claims
1. Verfahren zur Steuerung einer Siebvorrichtung (10), wobei die Siebvorrichtung (10) wenigstens vier Cluster von Unwuchterregereinheiten (U) aufweist, wobei jeder Cluster wenigstens zwei Unwuchterregereinheiten (U) aufweist, wobei jeder Cluster jeweils über einen Kopplungspunkt zur Beaufschlagung der Siebvorrichtung (10) mit Schwingungen ausgebildet ist, wobei zwei vordere Cluster näher zum Materialauftrag (30) angeordnet sind, wobei zwei hintere Cluster näher zum Grobmaterialaustrag (40) angeordnet sind, dadurch gekennzeichnet, dass der Phasenversatz zwischen den Unwuchterregereinheiten (U) innerhalb eines Clusters gesteuert wird, wobei als Eingangsmessgröße ein Indikator zur Verstopfung des Siebes (20) erfasst wird, wobei bei einer vermuteten Verstopfung der Phasenversatz auf 0 ° bis 5 °gesetzt wird, sodass durch die möglichst senkrechte Belastung des Siebes (20) die Verstopfung aus dem Sieb (20) geschlagen werden. 1. A method for controlling a screening device (10), the screening device (10) having at least four clusters of imbalance exciter units (U), each cluster having at least two imbalance exciter units (U), each cluster having a coupling point for acting on the screening device ( 10) is designed with vibrations, with two front clusters being arranged closer to the material application (30), with two rear clusters being arranged closer to the coarse material discharge (40), characterized in that the phase offset between the imbalance exciter units (U) is controlled within a cluster , with an indicator of the clogging of the screen (20) being recorded as the input variable, with a suspected clogging of the phase offset being set to 0° to 5°, so that the clogging of the screen (20 ) are beaten.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass als Indikator für eine Verstopfung das Verhältnis zwischen dem Massestrom des Grobmaterialaustrags (40) zu dem Massestrom des Feinmaterialaustrags (50) verwendet wird. 2. The method according to claim 1, characterized in that the ratio between the mass flow of the coarse material discharge (40) to the mass flow of the fine material discharge (50) is used as an indicator for a blockage.
3. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass als Indikator für eine Verstopfung eine Eigenschwingungsmode des Siebes (20) verwendet wird. 3. The method according to claim 1, characterized in that a natural vibration mode of the screen (20) is used as an indicator for a blockage.
4. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass für die Zeit der Reinigung mit einem Phasenversatz auf 0 ° bis 5 ° die Zuführung von Material über den Materialauftrag (30) unterbrochen wird. 4. The method according to any one of the preceding claims, characterized in that for the time of cleaning with a phase offset of 0 ° to 5 °, the supply of material on the material application (30) is interrupted.
PCT/EP2022/060888 2021-04-30 2022-04-25 Method of unclogging a screen during operation WO2022229094A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
BE20215343A BE1029358B1 (en) 2021-04-30 2021-04-30 Process for unclogging a sieve on the fly
DE102021204393.3 2021-04-30
BEBE2021/5343 2021-04-30
DE102021204393.3A DE102021204393B3 (en) 2021-04-30 2021-04-30 Procedure for removing blockages from a screen during operation

Publications (1)

Publication Number Publication Date
WO2022229094A1 true WO2022229094A1 (en) 2022-11-03

Family

ID=81842048

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/060888 WO2022229094A1 (en) 2021-04-30 2022-04-25 Method of unclogging a screen during operation

Country Status (1)

Country Link
WO (1) WO2022229094A1 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2551396A1 (en) * 1975-11-15 1977-05-18 Licentia Gmbh Horizontal force component prodn. for vibrating sieve - use two unbalanced motor one switchable to freewheel to change vibration vector
GB1536765A (en) * 1975-06-16 1978-12-20 Babbitless Sa Vibratory screening or feeding device with controlled actuation
EP0094741A2 (en) * 1982-04-09 1983-11-23 William F. Hahn Differential rate screening
FR2550471A1 (en) * 1983-08-08 1985-02-15 Strasbourg Ste Indle Forges Vibrator for adjusting the phase shift in a vibrating apparatus.
EP0296273A2 (en) * 1987-06-26 1988-12-28 Hein, Lehmann Trenn- und Fördertechnik GmbH Method of making a screen element and screen element made by said method
DE102017218371B3 (en) 2017-10-13 2018-09-20 Thyssenkrupp Ag Screening system with vibration-node-arranged vibration systems
DE102018205997A1 (en) 2018-04-19 2019-10-24 Thyssenkrupp Ag Screening system with grooved trusses
DE102019214864B3 (en) 2019-09-27 2020-06-18 Thyssenkrupp Ag Method and device for controlling and regulating a screening device and use
DE102019204845B3 (en) 2019-04-04 2020-07-09 Thyssenkrupp Ag Device and method for setting and regulating at least one vibration mode by means of the plurality of unbalance excitation units on a screening device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1536765A (en) * 1975-06-16 1978-12-20 Babbitless Sa Vibratory screening or feeding device with controlled actuation
DE2551396A1 (en) * 1975-11-15 1977-05-18 Licentia Gmbh Horizontal force component prodn. for vibrating sieve - use two unbalanced motor one switchable to freewheel to change vibration vector
EP0094741A2 (en) * 1982-04-09 1983-11-23 William F. Hahn Differential rate screening
FR2550471A1 (en) * 1983-08-08 1985-02-15 Strasbourg Ste Indle Forges Vibrator for adjusting the phase shift in a vibrating apparatus.
EP0296273A2 (en) * 1987-06-26 1988-12-28 Hein, Lehmann Trenn- und Fördertechnik GmbH Method of making a screen element and screen element made by said method
DE102017218371B3 (en) 2017-10-13 2018-09-20 Thyssenkrupp Ag Screening system with vibration-node-arranged vibration systems
DE102018205997A1 (en) 2018-04-19 2019-10-24 Thyssenkrupp Ag Screening system with grooved trusses
DE102019204845B3 (en) 2019-04-04 2020-07-09 Thyssenkrupp Ag Device and method for setting and regulating at least one vibration mode by means of the plurality of unbalance excitation units on a screening device
DE102019214864B3 (en) 2019-09-27 2020-06-18 Thyssenkrupp Ag Method and device for controlling and regulating a screening device and use

Similar Documents

Publication Publication Date Title
DE102021204393B3 (en) Procedure for removing blockages from a screen during operation
DE102021204394B3 (en) Procedure for removing blockages from a screen during operation
DE102021204392B3 (en) Method for operating a screening device as a circular, elliptical or linear oscillator depending on the moisture content of the material to be screened
DE102021204377A1 (en) Process for operating a screening device to keep the product quality constant with a fluctuating mass flow
DE102021204390A1 (en) Process for particle size-dependent efficient use of a screening device
DE102021204391A1 (en) Process for particle size-dependent optimization of a sieve with regard to product quality
DE102021204388A1 (en) Method for using screening devices that are as light as possible
DE112017002324B4 (en) Adjustable rotating sifter with divided weight
DE102012206347B4 (en) screening device
DE2429211A1 (en) VIBRATION SCREEN DEVICE
BE1029358B1 (en) Process for unclogging a sieve on the fly
WO2022229094A1 (en) Method of unclogging a screen during operation
BE1029360B1 (en) Process for unclogging a sieve on the fly
EP1740319B1 (en) Vibrating sieve machine and method for operation of a vibrating sieve machine
WO2022229085A1 (en) Method for unclogging a screen during operation
BE1029362B1 (en) Method of preventing feedback between a mill and a screening device
BE1029353B1 (en) Process for particle size-dependent efficient use of a screening device
BE1029359B1 (en) Process for operating a screening device to keep the product quality constant with a fluctuating mass flow
BE1029354B1 (en) Process for particle size-dependent optimization of a sieve with regard to product quality
BE1029355B1 (en) Method for operating a screening device as a centrifugal, elliptical or linear vibrator depending on the moisture content of the material to be screened
BE1029352B1 (en) Method for using screening devices that are as light as possible
WO2022229083A1 (en) Method for operating a screen device as a gyroscopic vibrator, elliptic vibrator or linear vibrator according to the moisture of the material to be screened
WO2022229093A1 (en) Method for operating a screen device for maintaining the product quality constant at a varying mass flow rate
BE1030008B1 (en) Vibrating conveyor with imbalance exciter units arranged in clusters
EP4149687A1 (en) Method for cleaning blinding particles in crushers

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22725244

Country of ref document: EP

Kind code of ref document: A1