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EP0265421A2 - Bar screen - Google Patents

Bar screen Download PDF

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Publication number
EP0265421A2
EP0265421A2 EP87890236A EP87890236A EP0265421A2 EP 0265421 A2 EP0265421 A2 EP 0265421A2 EP 87890236 A EP87890236 A EP 87890236A EP 87890236 A EP87890236 A EP 87890236A EP 0265421 A2 EP0265421 A2 EP 0265421A2
Authority
EP
European Patent Office
Prior art keywords
rods
screen according
bars
bar screen
carrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP87890236A
Other languages
German (de)
French (fr)
Other versions
EP0265421A3 (en
Inventor
Harald Dipl.-Ing. Dr. Hutterer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voestalpine AG
Original Assignee
Voestalpine AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voestalpine AG filed Critical Voestalpine AG
Publication of EP0265421A2 publication Critical patent/EP0265421A2/en
Publication of EP0265421A3 publication Critical patent/EP0265421A3/en
Withdrawn legal-status Critical Current

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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
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • 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
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets

Definitions

  • the invention relates to a bar screen with freely cantilevered, approximately parallel bars fixed on one side in a carrier, the screen passage being determined by the clear distance between the bars and the screen overflow exiting at the free end of the bars.
  • Such bar screens are advantageously suitable for the treatment of waste. Since the ends of the rods run free, the risk of clogging by flat or elongated parts in the waste, such as textiles, plastic films, cords, tapes, stockings, etc., is reduced compared to a sieve with sieve openings that are limited on all sides.
  • the sieve rods are arranged in one plane and the material to be sieved is transported in that the sieve rods are inclined downwards towards their free end. This enables linear transport, but there is no shifting of the material to be screened, so that the screen effect is incomplete.
  • a screening machine with a plurality of rotatably mounted, axially superimposed conical screen surfaces has become known.
  • a rotary sorting device can be found in DE-A1-31 19 728, in which a cylinder with recesses for removing sorted grains is provided.
  • a sieve drum for garbage has become known, in which stowage devices with baffles for pre-shredding the garbage are arranged.
  • the object of the invention is to improve the sieving effect of a bar sieve.
  • the invention consists essentially in that the carrier of the rods is rotatably mounted, that the carrier carries in the region of its periphery the rods which extend approximately in the direction of the axis of rotation, and that the carrier is hollow and has at least one feed opening at one end and is in open connection with the space enclosed by the rods at the other end.
  • the rods are connected to the carrier along a circle and describe a circular cylinder jacket. It is also possible that the space enclosed by the rods widens conically in the direction of the free end of the rods, but the arrangement of the rods on a circular cylinder jacket is more favorable.
  • the axis of rotation is advantageously inclined downwards in the direction of the free end of the rods, so that the screenings are transported in the direction of the free end of the rods.
  • An inclination of the axis of rotation of 3 to 8 ° is advantageous here.
  • At least one stationary obstacle is expediently arranged in the rotational path of the elastic rods, in the upper region thereof.
  • Such an obstacle causes the rods to vibrate during the rotation of the rod screen, which improves the transport of the screenings towards the free ends of the bars, the layering of the screenings and the screening effect and also a self-cleaning of the bars from stuck parts of the screenings is favored.
  • the obstacle is located in the upper area of the rotation path of the rods, it does not interfere with the sieve passage.
  • An obstacle located in the lower area would have the effect that parts of the sieve passage get caught on this obstacle.
  • the obstacle is from a role, the axis of rotation is approximately parallel to the axis of rotation and which is preferably coated with sound-absorbing material.
  • the rods can be arranged parallel to the generatrix of the cylinder jacket described by the rods.
  • the rods are preferably arranged obliquely to the generatrices, which also favors the sieving effect. Hiebei should preferably not or not significantly exceed the angle of inclination of the axis of rotation of the rods with the generatrix of the cylinder, so that the promotion of the screenings to the free ends of the rods is not affected by the inclination of the rods.
  • the rods preferably run in the direction of rotation in the direction of their free ends. This lagging arrangement promotes the conveyance of the screenings to the free ends of the rods.
  • the rods can advantageously be fixed to a retaining ring which is connected to the rotatable carrier in an exchangeable manner.
  • the bar screen can be adapted to the respective screening task.
  • the retaining ring can be exchanged in a simple manner and it is thus possible to use retaining rings with rods which are at different distances from one another.
  • Retaining rings can also be used which carry rods which form different angles with the generatrices of the circular cylinder described by the rods.
  • Devices for disintegrating the material to be screened can be arranged within the carrier formed by a closed drum.
  • the carrier can be designed as a sieve drum with particular advantage.
  • the end of the task is at the same height as or lower than the discharge end of the first conveyor belt. Since such elongated parts can only fall through the rods of the rod screen lying in the direction of the axis of rotation, they reach a conveyor belt running beneath the rod screen in the longitudinal direction of the conveyor belt.
  • the rods are 1 the rods, the free end of which is denoted by 2.
  • the rods are fixed to a hollow cylindrical support 3.
  • the cylinder 3 is a circular cylinder and the rods 1 describe a circular cylinder jacket.
  • the axis of rotation 4 of the bar screen is inclined towards the free ends 2 of the bars at an angle ⁇ of approximately 3 to 8 ° down to the horizontal 5.
  • the material to be screened for example the waste, is introduced into the hollow cylindrical carrier 3 via a conveyor belt 6.
  • the screenings are conveyed in the direction of arrow 7 to the discharge end formed by the free ends 2 of the bars 1.
  • a conveyor belt 8 is arranged below the area formed by the rods 1, the conveying direction of which is indicated by the arrow 9.
  • the sieve passage falling through the spaces between the rods 1 falls onto the conveyor belt 8 and is conveyed to the discharge end 10 of this conveyor belt 8.
  • the feed end 11 of a second conveyor belt 12 is arranged at a distance a from the discharge end 10 of the conveyor belt 8. This feed end 11 of the conveyor belt 12 is lower or at the same height as the discharge end 10 of the conveyor belt 8.
  • the sieve passage thus falls through the gap a onto an underlying conveyor belt 13 which removes the sieve passage.
  • the axis of rotation 4 of the bar screen is again inclined by the angle ⁇ with respect to the horizontal 5.
  • the embodiment according to FIGS. 3 and 4 differs from the embodiment according to FIG. 1 in that the rods 14 are inclined obliquely to the generatrices of the circular cylinder described by the rods. The angle of inclination of these rods to the generatrices is denoted by ⁇ .
  • the direction of rotation of the bar screen is indicated by arrows 15. The rods are therefore arranged obliquely to the direction of rotation towards the free ends 16 of the rods.

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  • Combined Means For Separation Of Solids (AREA)

Abstract

In a bar screen with freely projecting approximately parallel bars (1) fixed on one side in a carrier (3), the screen passage being determined by the clear distance between the bars (1) and the screen overflow coming out of the free end (2) of the bars (1), the carrier (3) is mounted rotatably and, in the region of its circumference, carries the bars which extend approximately in the direction of the axis of rotation (4). The carrier (3) is designed as a hollow cylinder and at one end has a feed orifice for the screen material and at the other end is connected openly to the space enclosed by the bars. The bars (1) are connected to the carrier (3) along a circle and describe a circular cylinder. As a result of the rotation of the bar screen and an inclination of the axis (4) of the latter which extends downwards in the direction of the free bar ends (2), the screen material is conveyed further. The screen passings fall through between the bars (1) and in the region of the free bar ends (2) the larger screen material arrives at the screen overflow. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Stangensieb mit in einem Träger einseitig festgelegten, frei auskragenden, ungefähr parallel verlaufenden Stangen, wobei der Siebdurchgang durch den lichten Abstand der Stangen bestimmt ist und der Sieb­überlauf am freien Ende der Stangen austritt. Solche Stangen­siebe sind mit Vorteil für die Aufbereitung von Müll geeig­net. Da die Enden der Stangen frei auslaufen, ist die Gefahr einer Verstopfung durch im Müll befindliche flächige oder langgestreckte Teile, wie Textilien, Kunststoffolien, Schnü­re, Tonbänder, Strümpfe, usf. gegenüber einem Sieb mit allseits begrenzten Sieböffnungen verringert. Bei den bekann­ten Stangensieben sind die Siebstangen in einer Ebene ange­ordnet und der Transport des Siebgutes erfolgt dadurch, daß die Siebstangen zu ihrem freien Ende abwärts geneigt sind. Hiedurch wird ein linearer Transport ermöglicht, jedoch ergibt sich keine Umschichtung des Siebgutes, so daß der Siebeffekt unvollständig ist.The invention relates to a bar screen with freely cantilevered, approximately parallel bars fixed on one side in a carrier, the screen passage being determined by the clear distance between the bars and the screen overflow exiting at the free end of the bars. Such bar screens are advantageously suitable for the treatment of waste. Since the ends of the rods run free, the risk of clogging by flat or elongated parts in the waste, such as textiles, plastic films, cords, tapes, stockings, etc., is reduced compared to a sieve with sieve openings that are limited on all sides. In the known rod sieves, the sieve rods are arranged in one plane and the material to be sieved is transported in that the sieve rods are inclined downwards towards their free end. This enables linear transport, but there is no shifting of the material to be screened, so that the screen effect is incomplete.

Aus der US-A-4 269 703 ist eine Siebmaschine mit einer Mehrzahl von rotierbar gelagerten, in Achsrichtung übereinan­der liegenden konischen Siebflächen bekanntgeworden. Aus der DE-A1-31 19 728 ist ein Rotations-Sortiergerät zu entnehmen, bei welchem ein Zylinder mit Ausnehmungen zum Beseitigen von aussortierten Körnern vorgesehen sind. Aus der DE-A1-31 02 846 ist eine Siebtrommel für Müll bekanntgeworden, in welcher Staueinrichtungen mit Prallflächen zur Vorzerkleinerung des Mülls angeordnet sind.From US-A-4 269 703 a screening machine with a plurality of rotatably mounted, axially superimposed conical screen surfaces has become known. A rotary sorting device can be found in DE-A1-31 19 728, in which a cylinder with recesses for removing sorted grains is provided. From DE-A1-31 02 846 a sieve drum for garbage has become known, in which stowage devices with baffles for pre-shredding the garbage are arranged.

Die Erfindung stellt sich zur Aufgabe, den Siebeffekt eines Stangensiebes zu verbessern. Zur Erfüllung dieser Aufgabe besteht die Erfindung im wesentlichen darin, daß der Träger der Stangen rotierbar gelagert ist, daß der Träger im Bereich seines Umfanges die Stangen trägt, welche sich angenähert in Richtung der Rotationsachse erstrecken, und daß der Träger hohl ausgebildet ist und an einem Ende wenigstens eine Aufgabeöffnung aufweist und am anderen Ende mit dem von den Stangen umschlossenen Raum in offener Verbindung steht.The object of the invention is to improve the sieving effect of a bar sieve. To achieve this object, the invention consists essentially in that the carrier of the rods is rotatably mounted, that the carrier carries in the region of its periphery the rods which extend approximately in the direction of the axis of rotation, and that the carrier is hollow and has at least one feed opening at one end and is in open connection with the space enclosed by the rods at the other end.

Dadurch, daß der Träger und der von den Stangen umschlossene Raum rotieren, wird eine Umschichtung des Siebgutes erreicht und es wird auf diese Weise der Siebeffekt verbessert. Gemäß einer bevorzugten Ausführungsform der Erfindung sind die Stangen entlang eines Kreises an den Träger angeschlossen und beschreiben einen Kreiszylindermantel. Es ist auch möglich, daß der von den Stangen umschlossene Raum sich in Richtung zum freien Ende der Stangen konisch erweitert, jedoch ist die Anordnung der Stangen auf einem Kreiszylindermantel günsti­ger.Because the carrier and the space enclosed by the rods rotate, the material to be sieved is shifted and the sieving effect is improved in this way. According to a preferred embodiment of the invention, the rods are connected to the carrier along a circle and describe a circular cylinder jacket. It is also possible that the space enclosed by the rods widens conically in the direction of the free end of the rods, but the arrangement of the rods on a circular cylinder jacket is more favorable.

Gemäß der Erfindung ist zweckmäßig die Rotationsachse in Richtung zum freien Ende der Stangen abwärts geneigt, so daß das Siebgut in Richtung zum freien Ende der Stangen transpor­tiert wird. Hiebei ist eine Neigung der Rotationsachse von 3 bis 8° vorteilhaft.According to the invention, the axis of rotation is advantageously inclined downwards in the direction of the free end of the rods, so that the screenings are transported in the direction of the free end of the rods. An inclination of the axis of rotation of 3 to 8 ° is advantageous here.

Gemäß der Erfindung ist zweckmäßig im Rotationsweg der elastischen Stangen, im oberen Bereich desselben, wenigstens ein ortsfestes Hindernis angeordnet. Durch ein solches Hindernis werden die Stangen bei der Rotation des Stangen­siebes in Schwingungen versetzt, wodurch der Transport des Siebgutes in Richtung zu den freien Enden der Stangen, die Umschichtung des Siebgutes und der Siebeffekt verbessert werden und auch eine Selbstreinigung der Stangen von hängen­gebliebenen Teilen des Siebgutes begünstigt wird. Da das Hindernis im oberen Bereich des Rotationsweges der Stangen angeordnet ist, stört es den Siebdurchgang nicht. Ein im unteren Bereich angeordnetes Hindernis würde den Effekt haben, daß Teile des Siebdurchganges an diesem Hindernis hängen bleiben. Gemäß einer bevorzugten Ausführungsform der Erfindung ist das Hindernis von einer Rolle, deren Drehachse ungefähr parallel zur Rotationsachse liegt und welche vor­zugsweise mit schalldämmendem Material beschichtet ist, gebildet.According to the invention, at least one stationary obstacle is expediently arranged in the rotational path of the elastic rods, in the upper region thereof. Such an obstacle causes the rods to vibrate during the rotation of the rod screen, which improves the transport of the screenings towards the free ends of the bars, the layering of the screenings and the screening effect and also a self-cleaning of the bars from stuck parts of the screenings is favored. Since the obstacle is located in the upper area of the rotation path of the rods, it does not interfere with the sieve passage. An obstacle located in the lower area would have the effect that parts of the sieve passage get caught on this obstacle. According to a preferred embodiment of the invention, the obstacle is from a role, the axis of rotation is approximately parallel to the axis of rotation and which is preferably coated with sound-absorbing material.

Die Stangen können parallel zu den Erzeugenden des von den Stangen beschriebenen Zylindermantels angeordnet sein. Vorzugsweise jedoch sind die Stangen schräg zu den Erzeu­genden angeordnet, wodurch auch wieder der Siebeffekt be­günstigt wird. Hiebei soll vorzugsweise der Winkel, welchen die Stangen mit den Erzeugenden des Zylinders einschließen, den Neigungswinkel der Rotationsachse nicht oder nicht wesentlich überschreiten, damit nicht durch die Schräg­stellung der Stangen die Förderung des Siebgutes zu den freien Enden der Stangen beeinträchtigt wird. Hiebei ver­laufen gemäß der Erfindung vorzugsweise die Stangen in Richtung zu ihren freien Enden in Rotationsrichtung nach­eilend. Durch diese nacheilende Anordnung wird die Förderung des Siebgutes zu den freien Enden der Stangen begünstigt.The rods can be arranged parallel to the generatrix of the cylinder jacket described by the rods. However, the rods are preferably arranged obliquely to the generatrices, which also favors the sieving effect. Hiebei should preferably not or not significantly exceed the angle of inclination of the axis of rotation of the rods with the generatrix of the cylinder, so that the promotion of the screenings to the free ends of the rods is not affected by the inclination of the rods. Here, according to the invention, the rods preferably run in the direction of rotation in the direction of their free ends. This lagging arrangement promotes the conveyance of the screenings to the free ends of the rods.

Gemäß der Erfindung können in vorteilhafter Weise die Stangen an einem Haltering festgelegt sein, welcher austauschbar mit dem rotierbaren Träger verbunden ist. Auf diese Weise kann das Stangensieb der jeweiligen Siebaufgabe angepaßt werden. Es kann in einfacher Weise der Haltering ausgewechselt werden und es können damit Halteringe mit in verschiedenen Abständen voneinander liegenden Stangen eingesetzt werden. Es können auch Halteringe eingesetzt werden, welche Stangen tragen, die verschiedene Winkel mit den Erzeugenden des von den Stangen beschriebenen Kreiszylinders einschließen.According to the invention, the rods can advantageously be fixed to a retaining ring which is connected to the rotatable carrier in an exchangeable manner. In this way, the bar screen can be adapted to the respective screening task. The retaining ring can be exchanged in a simple manner and it is thus possible to use retaining rings with rods which are at different distances from one another. Retaining rings can also be used which carry rods which form different angles with the generatrices of the circular cylinder described by the rods.

Innerhalb des von einer geschlossenen Trommel gebildeten Trägers können Vorrichtungen zum Aufschluß des Siebgutes angeordnet sein. Es können bespielsweise innerhalb dieser Trommel Vorrichtungen zum Aufreißen von Kunststoffsäcken vorgesehen sein. Mit besonderem Vorteil kann gemäß der Erfindung der Träger als Siebtrommel ausgebildet sein.Devices for disintegrating the material to be screened can be arranged within the carrier formed by a closed drum. For example, devices for tearing open plastic bags can be provided within this drum. According to the invention, the carrier can be designed as a sieve drum with particular advantage.

Dadurch wird vor Eintritt in den durch die Stangen begrenzten Raum des Stangensiebes Material von geringer Korngröße abgesondert. Es ist auf diese Weise möglich, eine Siebstufe vorzuschalten und dann die restlichen größeren Teile in Siebdurchgang und Siebüberlauf zu trennen. Langgestreckte, beispielsweise stangenförmige, Bestandteile des Materials ordnen sich durch die Rotation des Stangensiebes mit ihrer Längserstreckung parallel zur Rotationsachse ein. Solche Teile fallen mit dem Siebdurchgang zwischen den in der Richtung der Rotationsachse verlaufenden Stangen hindurch und sollten eigentlich zum Siebüberlauf gehören. Gemäß der Erfindung kann nun die Anordnung so getroffen sein, daß eine gegebenenfalls siebende Fördereinrichtung, wie z.B. ein Förderband, ein Flachsieb, eine Rüttelrinne od.dgl. ange­ordnet ist, über welches der Siebdurchgang abgeführt wird und an welche eine ggf. einstückig mit der ersten Fördereinrich­tung ausgebildetete weitere Fördereinrichtung, ggf. unter Freilassen einer Durchtrittsöffnung auf eine tieferliegende Abfördereinrichtung, insbesondere ein in Abstand vom Abwurf­ende des Förderbandes in gleicher Richtung wie dieses be­wegtes zweites Förderband, dessen Aufgabeende in gleicher Höhe wie oder tiefer als das Abwurfende des ersten Förder­bandes liegt, anschließt. Da solche langgestreckte Teile nur in Richtung der Rotationsachse liegend durch die Stangen des Stangensiebes hindurchfallen können, gelangen sie auf ein unterhalb des Stangensiebes verlaufendes Förderband in Längsrichtung des Förderbandes. Von diesem ersten Förderband werden die nicht langgestreckten Teile zum Siebdurchgang abgeworfen, da ja das Aufgabeende eines zweiten Föerderbandes in Abstand vom Abwurfende des ersten Förderbandes liegt. Langgestreckte Siebgutteile gelangen jedoch über diesen freien Abstand hinweg auf das zweite Förderband und werden von diesem zum Siebüberlauf gefördert. Ein gleicher Effekt wird mit anderen Fördereinrichtungen erzielt, wenn eine Durchtrittsöffnung für den Siebdurchgang freigelassen wird.As a result, material of small grain size is separated before entering the space of the bar screen delimited by the bars. In this way it is possible to precede a sieve stage and then to separate the remaining larger parts into the sieve passage and sieve overflow. Elongated, for example rod-shaped, components of the material arrange themselves through the rotation of the rod screen with its longitudinal extension parallel to the axis of rotation. Such parts fall with the sieve passage between the rods running in the direction of the axis of rotation and should actually belong to the sieve overflow. According to the invention, the arrangement can now be such that a possibly screening conveyor, such as a conveyor belt, a flat screen, a vibrating trough or the like. is arranged, via which the sieve passage is discharged and to which a further conveying device, possibly formed in one piece with the first conveying device, if necessary with the opening of a passage opening to a lower-lying conveying device, in particular a second moving at a distance from the discharge end of the conveyor belt in the same direction Conveyor belt, the end of the task is at the same height as or lower than the discharge end of the first conveyor belt. Since such elongated parts can only fall through the rods of the rod screen lying in the direction of the axis of rotation, they reach a conveyor belt running beneath the rod screen in the longitudinal direction of the conveyor belt. From this first conveyor belt the non-elongated parts are thrown off to the sieve passage, since the feeding end of a second conveyor belt is at a distance from the discharge end of the first conveyor belt. Elongated screenings, however, reach the second conveyor belt over this free distance and are conveyed by this to the screen overflow. The same effect is achieved with other conveyors if a passage opening for the sieve passage is left free.

In der Zeichnung ist die Erfindung anhand von Ausführungs­beispielen schematisch erläutert.

  • Fig. 1 und 2 zeigen ein rotierbares Stangensieb, wobei Fig. 1 eine Seitenansicht und Fig. 2 eine Ansicht in Richtung des Pfeiles II darstellt. Fig. 3 und 4 zeigen eine abgewandelte Ausführungsform, wobei Fig. 3 eine Seitenansicht und Fig. 4 eine Ansicht in Richtung des Pfeiles IV der Fig. 3 darstellt.
In the drawing, the invention is explained schematically using exemplary embodiments.
  • 1 and 2 show a rotatable bar screen, Fig. 1 is a side view and Fig. 2 is a view in the direction of arrow II. 3 and 4 show a modified embodiment, wherein FIG. 3 shows a side view and FIG. 4 shows a view in the direction of arrow IV of FIG. 3.

In Fig. 1 und 2 sind 1 die Stangen, deren freies Ende mit 2 bezeichnet ist. Die Stangen sind an einem hohlzylindrischen Träger 3 festgelegt. Der Zylinder 3 ist ein Kreiszylinder und die Stangen 1 beschreiben einen Kreiszylindermantel. Die Rotationsachse 4 des Stangensiebes ist in Richtung zu den freien Enden 2 der Stangen in einem Winkel α von ungefähr 3 bis 8° abwärts zur Horizontalen 5 geneigt. In den hohlzylind­rischen Träger 3 wird über ein Förderband 6 das Siebgut, beispielsweise der Müll, eingeführt. Infolge der Rotation des Stangensiebes und infolge der Neigung wird das Siebgut in Richtung des Pfeiles 7 zu dem durch die freien Enden 2 der Stangen 1 gebildeten Austragsende gefördert. Unterhalb des durch die Stangen 1 gebildeten Bereiches ist ein Förderband 8 angeordnet, dessen Förderrichtung durch den Pfeil 9 ange­deutet ist. Der durch die Zwischenräume zwischen den Stangen 1 hindurchfallende Siebdurchgang fällt auf das Förderband 8 und wird zum Abwurfende 10 dieses Förderbandes 8 gefördert. In einem Abstand a vom Abwurfende 10 des Förderbandes 8 ist das Aufgabeende 11 eines zweiten Förderbandes 12 angeordnet. Dieses Aufgabeende 11 des Förderbandes 12 liegt tiefer oder in gleicher Höhe wie das Abwurfende 10 des Förderbandes 8. Der Siebdurchgang fällt somit durch den Spalt a auf ein darunter liegendes Förderband 13, welches den Siebdurchgang abführt. Langgestreckte Teile des Siebdurchganges, welche zwischen den Stangen 1 hindurchfallen, liegen in Förder­richtung 9 des Förderbandes 8 auf dem Förderband 8 und gelangen daher über den Abstand a auf das nachfolgende Förderband 12, von welchem es zum Siebüberlauf gefördert wird.1 and 2 are 1 the rods, the free end of which is denoted by 2. The rods are fixed to a hollow cylindrical support 3. The cylinder 3 is a circular cylinder and the rods 1 describe a circular cylinder jacket. The axis of rotation 4 of the bar screen is inclined towards the free ends 2 of the bars at an angle α of approximately 3 to 8 ° down to the horizontal 5. The material to be screened, for example the waste, is introduced into the hollow cylindrical carrier 3 via a conveyor belt 6. As a result of the rotation of the bar screen and due to the inclination, the screenings are conveyed in the direction of arrow 7 to the discharge end formed by the free ends 2 of the bars 1. A conveyor belt 8 is arranged below the area formed by the rods 1, the conveying direction of which is indicated by the arrow 9. The sieve passage falling through the spaces between the rods 1 falls onto the conveyor belt 8 and is conveyed to the discharge end 10 of this conveyor belt 8. The feed end 11 of a second conveyor belt 12 is arranged at a distance a from the discharge end 10 of the conveyor belt 8. This feed end 11 of the conveyor belt 12 is lower or at the same height as the discharge end 10 of the conveyor belt 8. The sieve passage thus falls through the gap a onto an underlying conveyor belt 13 which removes the sieve passage. Elongated parts of the sieve passage, which fall between the rods 1, lie in the conveying direction 9 of the conveyor belt 8 on the conveyor belt 8 and therefore pass over the distance a to the next one Conveyor belt 12, from which it is conveyed to the screen overflow.

In Fig. 2 ist das Förderband, welches mit dem Siebdurchgang belastet wird, wieder mit 13 bezeichnet.In Fig. 2, the conveyor belt, which is loaded with the sieve passage, is again designated 13.

Bei der Ausführungsform nach Fig. 3 und 4 ist wieder die Rotationsachse 4 des Stangensiebes um den Winkel α gegenüber der Horizontalen 5 geneigt. Die Ausführungsform nach Fig. 3 und 4 unterscheidet sich von der Ausführungsform nach Fig. 1 dadurch, daß die Stangen 14 schräg zu den Erzeugenden des von den Stangen beschriebenen Kreiszylinders geneigt sind. Der Neigungswinkel dieser Stangen zu den Erzeugenden ist mit β bezeichnet. Die Drehrichtung des Stangensiebes ist mit Pfeilen 15 bezeichnet. Die Stangen sind daher nacheilend zur Drehrichtung zu den freien Enden 16 der Stangen hin schräg angeordnet.In the embodiment according to FIGS. 3 and 4, the axis of rotation 4 of the bar screen is again inclined by the angle α with respect to the horizontal 5. The embodiment according to FIGS. 3 and 4 differs from the embodiment according to FIG. 1 in that the rods 14 are inclined obliquely to the generatrices of the circular cylinder described by the rods. The angle of inclination of these rods to the generatrices is denoted by β. The direction of rotation of the bar screen is indicated by arrows 15. The rods are therefore arranged obliquely to the direction of rotation towards the free ends 16 of the rods.

Claims (14)

1. Stangensieb mit in einem Träger (3) einseitig festge­legten, frei auskragenden, ungefähr parallel verlaufenden Stangen (1,14), wobei der Siebdurchgang durch den lichten Abstand der Stangen bestimmt ist und der Siebüberlauf am freien Ende der Stangen austritt, dadurch gekennzeichnet, daß der Träger (3) rotierbar gelagert ist, daß er im Bereich seines Umfanges die Stangen (1, 14) trägt, welche sich angenähert in Richtung der Rotationsachse (4) erstrecken, und daß der Träger (3) hohl ausgebildet ist und an einem Ende wenigstens eine Aufgabeöffnung aufweist und am anderen Ende mit dem von den Stangen umschlossenen Raum in offener Ver­bindung steht.1. rod screen with freely projecting, approximately parallel rods (1, 14) fixed on one side in a carrier (3), the sieve passage being determined by the clear distance between the rods and the sieve overflow exiting at the free end of the rods, characterized in that that the carrier (3) is rotatably mounted, that it carries the rods (1, 14) in the area of its circumference, which extend approximately in the direction of the axis of rotation (4), and that the carrier (3) is hollow and attached to one End has at least one task opening and at the other end is in open connection with the space enclosed by the rods. 2. Stangensieb nach Anspruch 1, dadurch gekennzeichnet, daß die Stangen (1) entlang eines Kreises an den Träger (3) ange­schlossen sind.2. Bar screen according to claim 1, characterized in that the bars (1) are connected along a circle to the carrier (3). 3. Stangensieb nach Anspruch 1 oder 2, dadurch gekennzeich­net, daß die Stangen (1, 14) einen Kreiszylindermantel be­schreiben.3. bar screen according to claim 1 or 2, characterized in that the rods (1, 14) describe a circular cylinder jacket. 4. Stangensieb nach Anspruch 1, 2 oder 3, dadurch gekenn­zeichnet, daß die Rotationsachse (4) in Richtung zum freien Ende (2) der Stangen (1, 14) abwärts geneigt ist.4. bar screen according to claim 1, 2 or 3, characterized in that the axis of rotation (4) towards the free end (2) of the bars (1, 14) is inclined downwards. 5. Stangensieb nach Anspruch 4, dadurch gekennzeichnet, daß die Neigung (α) 3 bis 8° beträgt.5. bar screen according to claim 4, characterized in that the inclination (α) is 3 to 8 °. 6. Stangensieb nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß im Rotationsweg der elastischen Stangen (1, 14), im oberen Bereich desselben, wenigstens ein orts­festes Hindernis angeordnet ist.6. bar screen according to one of claims 1 to 5, characterized in that in the rotational path of the elastic rods (1, 14), in the upper region thereof, at least one stationary obstacle is arranged. 7. Stangensieb nach Anspruch 6, dadurch gekennzeichnet, daß das Hindernis von einer Rolle, deren Drehachse ungefähr parallel zur Rotationsachse (4) liegt und welche vorzugsweise mit schalldämmendem Material beschichtet ist, gebildet ist.7. Bar screen according to claim 6, characterized in that the obstacle is formed by a roller, the axis of rotation of which is approximately parallel to the axis of rotation (4) and which is preferably coated with sound-absorbing material. 8. Stangensieb nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Stangen (14) schräg zu den Erzeugen­den des von den Stangen (14) beschriebenen Zylindermantels angeordnet ist.8. bar screen according to one of claims 1 to 7, characterized in that the rods (14) is arranged obliquely to the generatrix of the cylinder jacket described by the rods (14). 9. Stangensieb nach Anspruch 8, dadurch gekennzeichnet, daß der Winkel (β), welchen die Stangen (14) mit den Erzeugenden des Zylinders einschließen, den Neigungswinkel (α) der Rotationsachse (4) nicht oder nicht wesentlich überschreitet.9. A bar screen according to claim 8, characterized in that the angle (β) which the bars (14) enclose with the generatrix of the cylinder does not, or does not substantially, exceed the angle of inclination (α) of the axis of rotation (4). 10. Stangensieb nach Anspruch 8 oder 9, dadurch gekenn­zeichnet, daß die Stangen (14) in Richtung zu ihren freien Enden (16) in Rotationsrichtung (15) nacheilend verlaufen.10. A bar screen according to claim 8 or 9, characterized in that the bars (14) lagging towards their free ends (16) in the direction of rotation (15). 11. Stangensieb nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Stangen (1, 14) an einem Haltering festgelegt sind, welcher austauschbar mit dem rotierbaren Träger (3) verbunden ist.11. Rod screen according to one of claims 1 to 10, characterized in that the rods (1, 14) are fixed to a retaining ring which is connected to the rotatable carrier (3) in an exchangeable manner. 12. Stangensieb nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß innerhalb des von einer geschlossenen Trommel gebildeten Trägers (3) Vorrichtungen zum Aufschluß des Siebgutes angeordnet sind.12. Bar screen according to one of claims 1 to 11, characterized in that devices for disintegrating the material to be screened are arranged within the carrier (3) formed by a closed drum. 13. Stangensieb nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß der Träger (3) als Siebtrommel ausge­bildet ist.13. Bar screen according to one of claims 1 to 12, characterized in that the carrier (3) is designed as a screening drum. 14. Stangensieb nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß unterhalb des von den Stangen (1, 14) gebildeten Bereiches des Stangensiebes eine ggf. siebende Fördereinrichtung (8), wie z.B. ein Förderband, ein Flach­sieb, eine Rüttelrinne od.dgl., angeordnet ist, über welches der Siebdurchgang abgeführt wird und ggf. unter Freilassen einer Durchtrittsöffnung auf eine tieferliegende Abförder­einrichtung (13), insbesondere ein in Abstand vom Abwurfende des Förderbandes in gleicher Richtung wie dieses bewegtes zweites Förderband (12), dessen Aufgabeende (11) in gleicher Höhe oder tiefer als das Abwurfende (10) des ersten Förder­bandes (8) liegt, anschließt.14. Bar screen according to one of claims 1 to 13, characterized in that below the area of the bar screen formed by the bars (1, 14) a possibly screening Conveying device (8), such as a conveyor belt, a flat screen, a vibrating trough or the like, is arranged, via which the screen passage is discharged and, if necessary, leaving a passage opening to a lower-lying discharge device (13), in particular one at a distance from the discharge end of the conveyor belt in the same direction as this moving second conveyor belt (12), the feed end (11) of which is at the same height or lower than the discharge end (10) of the first conveyor belt (8).
EP87890236A 1986-10-24 1987-10-23 Bar screen Withdrawn EP0265421A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2841/86 1986-10-24
AT284186A AT386764B (en) 1986-10-24 1986-10-24 ROD SCREEN

Publications (2)

Publication Number Publication Date
EP0265421A2 true EP0265421A2 (en) 1988-04-27
EP0265421A3 EP0265421A3 (en) 1989-01-18

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EP87890236A Withdrawn EP0265421A3 (en) 1986-10-24 1987-10-23 Bar screen

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EP (1) EP0265421A3 (en)
AT (1) AT386764B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5285905A (en) * 1992-07-16 1994-02-15 Laprade Real R Screening assembly for soil
US6609617B1 (en) 2002-04-08 2003-08-26 Inco Limited Trommel
DE102013106570A1 (en) 2013-06-24 2014-12-24 Thyssenkrupp Resource Technologies Gmbh Sieve bar, bar screen and method of making a sieve
EP3248695A1 (en) * 2016-05-27 2017-11-29 Schlüter Friedrich-Wilhelm Screening device
CN110918469A (en) * 2019-12-10 2020-03-27 李燕 Gravel and sand sieving mechanism is used in construction of building bridge
CN114210542A (en) * 2022-01-20 2022-03-22 射阳三德机械制造有限公司 Screening equipment for building engineering

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1389231A (en) * 1915-03-30 1921-08-30 Drakes Ltd Mechanism for screening or sifting granulated substances
FR1449000A (en) * 1965-06-30 1966-03-18 Perrussel Freres Ets Cylindrical sizer for roots and tubers, rotating around its axis and whose wall is made up of rigid elements, movable in the crowns ensuring their fixation
DE3102846A1 (en) * 1981-01-29 1982-08-19 Mannesmann Veba Umwelttechnik GmbH, 4690 Herne SCREEN DRUM FOR MUELL AND METHOD FOR THEIR OPERATION
EP0086488A2 (en) * 1982-02-16 1983-08-24 Deutsche Kommunal-Anlagen Miete GmbH Discharging device for a rotary drum furnace
SU1050757A1 (en) * 1982-07-07 1983-10-30 Московский Ордена Трудового Красного Знамени Автомобильно-Дорожный Институт Apparatus for recovering solid particles off suspensions
EP0103831A2 (en) * 1982-09-17 1984-03-28 Mogensen GmbH & Co KG Screening device, particularly for material difficult to screen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2810587C2 (en) * 1978-03-11 1984-11-08 Siebtechnik GmbH, 4330 Mülheim Sieving machine
DE3119728A1 (en) * 1980-12-18 1982-07-29 Seirei Industry Co., Ltd., Okayama Cylinder-type rotary sorting device
BE897002A (en) * 1983-06-09 1983-10-03 Backus Petrus A M Length sorter e.g. for agricultural products - by aligning on vibrating plate and passing by belts over increasingly spaced plates above troughs

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1389231A (en) * 1915-03-30 1921-08-30 Drakes Ltd Mechanism for screening or sifting granulated substances
FR1449000A (en) * 1965-06-30 1966-03-18 Perrussel Freres Ets Cylindrical sizer for roots and tubers, rotating around its axis and whose wall is made up of rigid elements, movable in the crowns ensuring their fixation
DE3102846A1 (en) * 1981-01-29 1982-08-19 Mannesmann Veba Umwelttechnik GmbH, 4690 Herne SCREEN DRUM FOR MUELL AND METHOD FOR THEIR OPERATION
EP0086488A2 (en) * 1982-02-16 1983-08-24 Deutsche Kommunal-Anlagen Miete GmbH Discharging device for a rotary drum furnace
SU1050757A1 (en) * 1982-07-07 1983-10-30 Московский Ордена Трудового Красного Знамени Автомобильно-Дорожный Институт Apparatus for recovering solid particles off suspensions
EP0103831A2 (en) * 1982-09-17 1984-03-28 Mogensen GmbH & Co KG Screening device, particularly for material difficult to screen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED, Woche 84/28, 22. August 1984, Zusammenfassung Nr. 84-175033/28, Derwent Publications Ltd, London, GB; & SU-A-1 050 757 (MOSCOW AUTO ROAD CONSTR.) 30-10-1983 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5285905A (en) * 1992-07-16 1994-02-15 Laprade Real R Screening assembly for soil
US6609617B1 (en) 2002-04-08 2003-08-26 Inco Limited Trommel
WO2003086663A1 (en) * 2002-04-08 2003-10-23 Inco Limited Trommel
DE102013106570A1 (en) 2013-06-24 2014-12-24 Thyssenkrupp Resource Technologies Gmbh Sieve bar, bar screen and method of making a sieve
WO2014206772A1 (en) * 2013-06-24 2014-12-31 Thyssenkrupp Steel Europe Ag Screen bar, bar screen and method for producing a screen bar
AU2014301397B2 (en) * 2013-06-24 2018-03-22 Flsmidth A/S Screen bar, bar screen and method for producing a screen bar
US10124372B2 (en) 2013-06-24 2018-11-13 Thyssenkrupp Steel Europe Ag Screen bar, bar screen and method for producing a screen bar
EP3248695A1 (en) * 2016-05-27 2017-11-29 Schlüter Friedrich-Wilhelm Screening device
CN110918469A (en) * 2019-12-10 2020-03-27 李燕 Gravel and sand sieving mechanism is used in construction of building bridge
CN114210542A (en) * 2022-01-20 2022-03-22 射阳三德机械制造有限公司 Screening equipment for building engineering

Also Published As

Publication number Publication date
AT386764B (en) 1988-10-10
ATA284186A (en) 1988-03-15
EP0265421A3 (en) 1989-01-18

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