EP0521361A2 - Sieve drum - Google Patents

Sieve drum Download PDF

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Publication number
EP0521361A2
EP0521361A2 EP92110438A EP92110438A EP0521361A2 EP 0521361 A2 EP0521361 A2 EP 0521361A2 EP 92110438 A EP92110438 A EP 92110438A EP 92110438 A EP92110438 A EP 92110438A EP 0521361 A2 EP0521361 A2 EP 0521361A2
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EP
European Patent Office
Prior art keywords
drum
mesh size
section
sieve
sections
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Granted
Application number
EP92110438A
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German (de)
French (fr)
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EP0521361B1 (en
EP0521361A3 (en
Inventor
Klaus Thesenfitz
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ASCO ASPHALT-CONTAINER AKTIENGESELLSCHAFT
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Lintec GmbH and Co KG
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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
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/05—Crushing, pulverising or disintegrating apparatus; Aggregate screening, cleaning, drying or heating apparatus; Dust-collecting arrangements specially adapted therefor

Definitions

  • the invention relates to a sieve drum for conditioning and classifying granular material with at least one input device at one end of the drum rotating about its longitudinal axis and an output of the conditioned material at the other end of the drum into a first annular space between the drum and successive in the longitudinal direction of the drum Inner ring screen sections concentrically surrounding the drum, the mesh size of the ring screen sections changing such that the section with the smaller mesh size is the axially closest to the output, the section with the largest mesh size is the most distant ring screen section, and with the underside of the drum arranged silos for receiving screenings of different particle sizes.
  • Such screening drums are used, for example, to process the material of road surfaces using bitumen or old asphalt and grit of different grain sizes. Coarse grit grit is used to build a support structure, smaller grit grit is used to partially fill the cavities of the support structure and the bitumen penetrating into the remaining cavities serves to bind the other covering components.
  • a generic screening drum can be used to bring the individual components into the correct mixing ratio and, in particular, to prepare them by tempering in the heated mixing drum if the individual components of the road surface are to be applied to the road base at the same time.
  • the object of the invention is to design a generic device such that the individual ring screen sections can be assigned to the drum in a particularly expedient manner.
  • "as practical as possible” means in particular that the ring screen sections can be assembled and disassembled as quickly as possible and with a minimum of tooling, and that the assembled ring screens are reliably attached to the drum in the assembled state.
  • this is to be understood to mean that the ring sieve sections are assigned to one another in such a way that the sieves are acted upon in accordance with their mesh size in accordance with the particle distribution in the material to be sieved.
  • outer ring sieve sections are used, the individual mesh sizes being different and being selected such that not the full amount of the sieved material is passed over the finest sieve, but in the range from 50 to 60% of the sieved material. This can be achieved by a pre-sieve with a larger mesh size arranged upstream of the ring screen cut with the smallest mesh size.
  • the outer ring screen sections are designed in the form of windows in which the individual screens are fastened. It is sufficient to simply place the sieves on the frame and fasten them to this frame, the frames additionally being provided with guide parts which project radially inwards when placed on the sieve drum and ensure that the material to be sieved in the outer annular space performs the desired axial movement.
  • a drum 2 In a fixed housing 1, a drum 2 is rotatably mounted about its longitudinal axis 3. A burner 40, whose longitudinal flame axis coincides with the longitudinal drum axis 3, projects into the drum 2 from the drum end on the left in the illustration. The burner 40 can be operated with gas or oil.
  • the drum 2 is driven by a motor (not shown) via a gear unit which includes a race 5 surrounding the drum and firmly connected to it.
  • a number of so-called hot silos 6 are arranged in succession in the longitudinal direction of the drum. These hot silos are funnel-shaped containers that are largely insulated from temperature radiation and hold screenings or grit of different particle sizes emerging from the drum 1.
  • inner ring sieve sections NW10, NW25 and NW32 built up successively from partial segments in the drum longitudinal direction are arranged on the drum 2 such that an inner annular space 8 exists between the casing of the drum 2 and the ring sieve sections.
  • the ring screen sections have different mesh sizes
  • the ring screen sections 10 have a mesh size 10
  • the ring screen sections 32 have a mesh size 32, for example.
  • the annular space 8 communicates with the interior of the drum 2 via openings which are evenly distributed over the drum circumference at the drum end on the left in the drawing.
  • the dust and moisture are discharged through an exhaust stack 19 at the right-hand end of the drum.
  • FIG. 2 shows not only the radially inner ring sieve sections NW10, NW25 and NW32, but also the outer ring sieve sections NW4, NW18 and NW25, which are also arranged at a greater radial distance.
  • the outer ring screen sections are separated from the inner ring screen sections by an annular space 108.
  • the hot silo 0 - 4 receives material with the smallest particle size, corresponding to the smallest mesh size NW4.
  • NW10 corresponds to the smaller mesh size, NW18 the medium, NW25 the larger and NW 32 the largest mesh size.
  • a collecting device G32 is provided for the oversize grain at the right-hand end of the drum, whereby the oversize grain can also be directed into the adjacent silo by means of a switching flap, which is in itself intended for the grain sizes between NW25 and NW32.
  • the individual ring screen sections are provided with the reference number which corresponds to the mesh size of the associated screen.
  • the NW32 sieve therefore has a mesh size of 32, making it the sieve with the largest mesh size.
  • the NW4 sieve is the sieve with the smallest mesh size and so on.
  • 100% denotes the entire screenings which arrive at the left-hand end of the drum 2 and enter the radially inner annular space 8 through the openings 9.
  • the material to be sieved reaches the ring sieve section NW10 and all particles larger than the mesh size NW10 reach the sieves NW25 and NW32 in the axial direction.
  • the particles falling through the ring sieve sections 10 enter the outer annular space 108.
  • the smaller particles fall through the ring sieve sections NW4.
  • the screenings in question here are at least 40% of the total screenings. Particles with a size between the mesh size 10 and 4 advance in the axial direction and are collected in an additional collecting section. This portion of the screenings has about 20% of the total screenings.
  • Material larger than NW10 reaches the ring screen sections NW32 in the axial direction.
  • the larger particles go as quantity G32 into a separate collection container, which in turn is about 20% of the total quantity.
  • the proportion of the amount of material to be screened which falls through the ring sieve sections 32 is divided into the ring sieve sections NW18 and NW25 into the quantities with grain sizes 18-10 and 25-18, experience having shown that the two proportions are each 10%.
  • the sensitive, finest ring sieve section NW4 is only acted upon with 60% of the total quantity of sieved material.
  • the parts of the quantity of material to be screened that do not fall through the ring sieve sections NW4 are particles with only a slightly larger particle size than the mesh size of the ring sieve section NW4, i.e. the finest sieve is not particularly mechanically stressed by such particles.
  • the screening drum 2 can also be operated with an inclined axis, both on the one hand and on the other end, so that the material to be screened remains correspondingly longer on the screens.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Centrifugal Separators (AREA)
  • Toys (AREA)
  • Harvester Elements (AREA)
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Abstract

Sieve drum (2) for conditioning and classifying granular material, having a feed device (100) and inner annular sieve sections (NW32, NW25, NW10) in succession in the longitudinal direction of the drum. The mesh size of the annular sieve sections changes in such a manner that the section (NW10) with relatively small mesh size is the annular sieve section closest to the discharge (9) and the section (NW32) with the largest mesh size is the annular sieve section axially furthest removed from the discharge (9). Outer annular sieve sections (NW4, NW18) with different mesh sizes are arranged radially outside the inner annular sieve sections (NW10, NW25, NW32). The section (NW4) with the smallest mesh size is the annular sieve section axially closest to the discharge (9), section (NW18) with medium mesh size is axially furthest removed from the discharge (9). A catch region (4-10) for sieved material with a particle size between the smaller (NW10) and the smallest mesh size (NW4) is arranged axially between the outer annular sieve sections with the smallest and the medium mesh size (NW4, NW18). <IMAGE>

Description

Die Erfindung bezieht sich auf eine Siebtrommel zum Konditionieren und Klassieren von körnigem Gut mit mindestens einer Eingabevorrichtung an einem Stirnende der um ihre liegende Längsachse drehenden Trommel und einer Ausgabe des konditionierten Gutes am anderen Trommelende in einen ersten Ringraum zwischen der Trommel und in Trommellängsrichtung aufeinanderfolgenden, die Trommel konzentrisch umgebenden inneren Ringsiebabschnitten, wobei sich die Maschenweite der Ringsiebabschnitte derart verändert, daß der Abschnitt mit kleinerer Maschenweite der der Ausgabe axial nächste, der Abschnitt mit der größten Maschenweite der der Ausgabe axiel am weitesten entfernte Ringsiebabschnitt ist, und mit an der Unterseite der Trommel angeordneten Silos zur Aufnahme von Siebgut unterschiedlicher Partikelgröße.The invention relates to a sieve drum for conditioning and classifying granular material with at least one input device at one end of the drum rotating about its longitudinal axis and an output of the conditioned material at the other end of the drum into a first annular space between the drum and successive in the longitudinal direction of the drum Inner ring screen sections concentrically surrounding the drum, the mesh size of the ring screen sections changing such that the section with the smaller mesh size is the axially closest to the output, the section with the largest mesh size is the most distant ring screen section, and with the underside of the drum arranged silos for receiving screenings of different particle sizes.

Solche Siebtrommeln werden beispielsweise angewendet, um das Material von Straßendecken unter Verwendung von Bitumen bzw. Altasphalt und Splitt unterschiedlicher Körnung aufzubereiten. Splitt grober Körnung wird für den Aufbau eines Stützgerüstes, Splitt kleinerer Körnung wird zum teilweisen Füllen der Hohlräume des Stützgerüstes verwendet und das in die verbleibenden Hohlräume eindringende Bitumen dient der Bindung der übrigen Belagbestandteile. Eine gattungsgemäße Siebtrommel kann dabei zum Einsatz kommen, um die einzelnen Bestandteile in das richtige Mischungsverhältnis zu bringen und insbesondere durch Temperieren in der beheizten Mischtrommel aufzubereiten, wenn die einzelnen Komponenten der Straßendecke gleichzeitig auf dem Straßenunterbau aufgebracht werden sollen.Such screening drums are used, for example, to process the material of road surfaces using bitumen or old asphalt and grit of different grain sizes. Coarse grit grit is used to build a support structure, smaller grit grit is used to partially fill the cavities of the support structure and the bitumen penetrating into the remaining cavities serves to bind the other covering components. A generic screening drum can be used to bring the individual components into the correct mixing ratio and, in particular, to prepare them by tempering in the heated mixing drum if the individual components of the road surface are to be applied to the road base at the same time.

Bei einer bekannten, auf den gleichen Erfinder zurückgehenden Siebtrommel (deutsches Patent 38 01 383) sind Ringsiebabschnitte mit drei unterschiedlichen Maschenweiten vorgesehen, und hierbei wird das Sieb mit der kleinsten Maschenweite mit dem gesamten Siebgut beaufschlagt, d.h. dieses feine Sieb wird auch mit den größten Partikeln belastet, was zu einem raschen Verschleiß des Siebes mit der kleinsten Maschenweite führt. Darüber hinaus ist der Wirkungsgrad des Siebvorganges nicht optimal, da beispielsweise die größeren Partikel durchaus kleinere Partikel mitnehmen können, so daß die kleineren Partikel nicht durch das vorgesehene Sieb hindurchfallen können.In a known sieve drum dating back to the same inventor (German patent 38 01 383), ring sieve sections with three different mesh sizes are provided, and in this case the sieve with the smallest mesh size is loaded with the entire material to be sieved, i.e. this fine sieve is also loaded with the largest particles, which leads to rapid wear of the sieve with the smallest mesh size. In addition, the efficiency of the sieving process is not optimal, since, for example, the larger particles can take smaller particles with them, so that the smaller particles cannot fall through the sieve provided.

Aufgabe der Erfindung ist es, eine gattungsgemäße Vorrichtung so auszubilden, daß die einzelnen Ringsiebabschnitte in besonders zweckmäßiger Weise der Trommel zugeordnet werden können. Unter einer "möglichst zweckmäßigen Weise" wird insbesondere verstanden, daß die Ringsiebabschnitte möglichst rasch und mit einem Minimum an Werkzeugaufwand montiert und demontiert werden können, und daß die montierten Ringsiebe im montierten Zustand zuverlässig an der Trommel befestigt sind. Weiterhin soll hierunter verstanden werden, daß die Ringsiebabschnitte so einander zugeordnet werden, daß die Siebe hinsichtlich ihrer Maschenweite der Partikelverteilung im Siebgut entsprechend beaufschlagt werden.The object of the invention is to design a generic device such that the individual ring screen sections can be assigned to the drum in a particularly expedient manner. By "as practical as possible" means in particular that the ring screen sections can be assembled and disassembled as quickly as possible and with a minimum of tooling, and that the assembled ring screens are reliably attached to the drum in the assembled state. Furthermore, this is to be understood to mean that the ring sieve sections are assigned to one another in such a way that the sieves are acted upon in accordance with their mesh size in accordance with the particle distribution in the material to be sieved.

Gelöst wird diese Aufgabe durch die im kennzeichnenden Teil des Patentanspruchs angegebenen Merkmale.This object is achieved by the features specified in the characterizing part of the patent claim.

Bei der vorliegenden Erfindung werden neben radial inneren Ringsiebabschnitten äußere Ringsiebabschnitte eingesetzt, wobei die einzelnen Maschenweiten unterschiedlich sind und so gewählt werden, daß über das feinste Sieb nicht die volle Menge des Siebgutes, sondern im Bereich von 50 bis 60 % des Siebgutes geleitet werden. Dies kann durch ein dem Ringsiebschnitt mit kleinster Maschenweite vorgeordnetes Vorsieb mit größerer Maschenweite erreicht werden.In the present invention, in addition to radially inner ring sieve sections, outer ring sieve sections are used, the individual mesh sizes being different and being selected such that not the full amount of the sieved material is passed over the finest sieve, but in the range from 50 to 60% of the sieved material. This can be achieved by a pre-sieve with a larger mesh size arranged upstream of the ring screen cut with the smallest mesh size.

Der Erfindung entsprechend sind die äußeren Ringsiebabschnitte in Form von Fenstern ausgebildet, in denen die einzelnen Siebe befestigt sind. Es genügt, die Siebe lediglich auf die Rahmen aufzulegen und an diesen Rahmen zu befestigen, wobei die Rahmen zusätzlich auch noch mit Leitteilen versehen sind, die im auf die Siebtrommel aufgelegten Zustand radial nach innen vorstehen und dafür sorgen, daß das Siebgut im äußeren Ringzwischenraum die gewünschte axiale Bewegung durchführt.According to the invention, the outer ring screen sections are designed in the form of windows in which the individual screens are fastened. It is sufficient to simply place the sieves on the frame and fasten them to this frame, the frames additionally being provided with guide parts which project radially inwards when placed on the sieve drum and ensure that the material to be sieved in the outer annular space performs the desired axial movement.

Die Erfindung wird nachstehend anhand der Zeichnung beispielsweise erläutert.

Fig. 1
ist eine schaubildliche Darstellung einer Trommel in Seitenansicht, wobei die äußeren Ringsiebabschnitte entfernt worden sind.
Fig. 2
ist eine der Figur 1 entsprechende Darstellung, jedoch mit den äußeren Ringsiebabschnitten.
Fig. 3
ist eine schematische Darstellung des Siebprinzipes, das der vorliegenden Erfindung zugrunde liegt.
The invention is explained below with reference to the drawing, for example.
Fig. 1
is a perspective view of a drum in side view with the outer ring screen sections removed.
Fig. 2
is a representation corresponding to Figure 1, but with the outer ring screen sections.
Fig. 3
is a schematic representation of the sieve principle on which the present invention is based.

In einem feststehenden Gehäuse 1 ist eine Trommel 2 um ihre Längsachse 3 drehbar gelagert. In die Trommel 2 ragt von dem in der Darstellung linken Trommelende aus ein Brenner 40 hinein, dessen Flammenlängsachse mit der Trommellängsachse 3 zusammenfällt. Der Brenner 40 kann mit Gas oder Öl betrieben werden. Der Antrieb der Trommel 2 erfolgt von einem nicht dargestellten Motor aus über ein Getriebe, das einen die Trommel umgebenden, fest mit dieser verbundenen Laufring 5 einschließt. An der Unterseite des Gehäuses 1 sind mehrere sogenannte Heißsilos 6 in Trommellängsrichtung aufeinanderfolgend angeordnet. Diese Heißsilos sind gegen Temperaturabstrahlung weitgehend isolierte trichterförmige Behälter, die aus der Trommel 1 austretendes Siebgut oder Splitt unterschiedlicher Partikelgröße aufnehmen.In a fixed housing 1, a drum 2 is rotatably mounted about its longitudinal axis 3. A burner 40, whose longitudinal flame axis coincides with the longitudinal drum axis 3, projects into the drum 2 from the drum end on the left in the illustration. The burner 40 can be operated with gas or oil. The drum 2 is driven by a motor (not shown) via a gear unit which includes a race 5 surrounding the drum and firmly connected to it. On the underside of the housing 1, a number of so-called hot silos 6 are arranged in succession in the longitudinal direction of the drum. These hot silos are funnel-shaped containers that are largely insulated from temperature radiation and hold screenings or grit of different particle sizes emerging from the drum 1.

Um die Klassierung des Gutes vornehmen zu können, sind in Trommellängsrichtung aufeinanderfolgend aus Teilsegmenten aufgebaute innere Ringsiebabschnitte NW10, NW25 und NW32 auf der Trommel 2 derart angeordnet, daß zwischen dem Mantel der Trommel 2 und den Ringsiebabschnitten ein innerer Ringraum 8 besteht. Die Ringsiebabschnitte haben unterschiedliche Maschenweiten, die Ringsiebabschnitte 10 eine Maschenweite 10 und die Ringsiebabschnitte 32 eine Maschenweite 32 beispielsweise. Der Ringraum 8 steht mit dem Innenraum der Trommel 2 über Öffnungen in Verbindung, die an dem in der Zeichnung linken Trommelende gleichmäßig auf den Trommelumfang verteilt sind.In order to be able to classify the material, inner ring sieve sections NW10, NW25 and NW32 built up successively from partial segments in the drum longitudinal direction are arranged on the drum 2 such that an inner annular space 8 exists between the casing of the drum 2 and the ring sieve sections. The ring screen sections have different mesh sizes, the ring screen sections 10 have a mesh size 10 and the ring screen sections 32 have a mesh size 32, for example. The annular space 8 communicates with the interior of the drum 2 via openings which are evenly distributed over the drum circumference at the drum end on the left in the drawing.

Beim Betrieb der Anlage kann nun an beiden Trommelenden unterschiedliches Gut über je eine Aufgabevorrichtung 100 und 11 in die Trommel 2 eingegeben werden. Über die Aufgabevorrichtung 100 am rechten, dem Brenner 40 abgekehrten Ende der Trommel, wird z.B. neues Gut im kalten Zustand, also insbesondere Splitt unterschiedlicher Körnung, in die Trommel eingegeben und dieses Gut wandert der Flamme des Brenners 40 entgegen und wird dabei auf die gewünschte Temperatur aufgeheizt. Über die Aufgabevorrichtung 11 am Trommelende des Brenners 40 wird z.B. Altasphalt in die Trommel eingegeben. Das Gemisch aus Altasphalt und Splitt gelangt durch die Öffnungen 9 hindurch in den Ringraum 8 und von dort, klassiert nach der jeweiligen Splittgröße, in die Heißsilos 6.During operation of the system, different goods can now be input into the drum 2 at both drum ends via one feed device 100 and one each. Via the feed device 100 at the right end of the drum facing away from the burner 40, for example, new material in the cold state, in particular chippings of different grain sizes, is introduced into the drum and this material migrates to the flame of the burner 40 and is heated to the desired temperature. Via the feed device 11 at the drum end of the burner 40, for example, old asphalt is fed into the drum. The mixture of old asphalt and grit passes through the openings 9 into the annular space 8 and from there, classified according to the size of the grit, into the hot silos 6.

Der Staub- und Feuchtigkeitsaustrag erfolgt durch einen Abgaskamin 19 am rechtsseitigen Trommelende.The dust and moisture are discharged through an exhaust stack 19 at the right-hand end of the drum.

In Fig. 2 sind nicht nur die radial inneren Ringsiebabschnitte NW10, NW25 und NW32 gezeigt, sondern auch die darüber hinaus in größerem radialen Abstand angeordneten äußeren Ringsiebabschnitte NW4, NW18 und NW25. Die äußeren Ringsiebabschnitte sind von den inneren Ringsiebabschnitten durch einen Ringzwischenraum 108 getrennt.2 shows not only the radially inner ring sieve sections NW10, NW25 and NW32, but also the outer ring sieve sections NW4, NW18 and NW25, which are also arranged at a greater radial distance. The outer ring screen sections are separated from the inner ring screen sections by an annular space 108.

In Fig. 2 sind die einzelnen Heißsilos 6 wiedergegeben, wobei sich die in den einzelnen Silos befindlichen Zahlen auf die Partikelgröße beziehen. Der Heißsilo 0 - 4 erhält Material mit der kleinsten Partikelgröße, entsprechend der kleinsten Maschenweite NW4. NW10 entspricht der kleineren Maschenweite, NW18 der mittleren, NW25 der größeren und NW 32 der größten Maschenweite. Es ist zu erkennen, daß für das Überkorn eine Sammeleinrichtung G32 am rechtsseitigen Ende der Trommel vorgesehen ist, wobei durch eine Umschaltklappe das Überkorn auch in den benachbarten Silo gelenkt werden kann, der an und für sich für die Korngrößen zwischen NW25 und NW32 gedacht ist.2 shows the individual hot silos 6, the numbers in the individual silos relating to the particle size. The hot silo 0 - 4 receives material with the smallest particle size, corresponding to the smallest mesh size NW4. NW10 corresponds to the smaller mesh size, NW18 the medium, NW25 the larger and NW 32 the largest mesh size. It can be seen that a collecting device G32 is provided for the oversize grain at the right-hand end of the drum, whereby the oversize grain can also be directed into the adjacent silo by means of a switching flap, which is in itself intended for the grain sizes between NW25 and NW32.

Das in Fig. 3 gezeigte Siebschema ist schematisch ausgeführt worden, um die der Erfindung zugrunde liegende Idee besser darstellen zu können.3 has been carried out schematically in order to better illustrate the idea on which the invention is based.

Die einzelnen Ringsiebabschnitte sind mit derjenigen Bezugszahl versehen, die der Maschenweite des zugehörigen Siebes entspricht. Das Sieb NW32 hat also entsprechend eine Maschenweite von 32, ist also das Sieb mit der größten Maschenweite. Das Sieb NW4 ist das Sieb mit der kleinsten Maschenweite und so fort.The individual ring screen sections are provided with the reference number which corresponds to the mesh size of the associated screen. The NW32 sieve therefore has a mesh size of 32, making it the sieve with the largest mesh size. The NW4 sieve is the sieve with the smallest mesh size and so on.

Mit 100% ist das gesamte Siebgut bezeichnet, das am linksseitigen Ende der Trommel 2 ankommt und durch die Öffnungen 9 in den radial inneren Ringraum 8 hineingelangt.100% denotes the entire screenings which arrive at the left-hand end of the drum 2 and enter the radially inner annular space 8 through the openings 9.

Das Siebgut gelangt auf den Ringsiebabschnitt NW10 und alle Partikel größer als die Maschenweite NW10 gelangen in axialer Richtung weiter zu den Sieben NW25 und NW32.The material to be sieved reaches the ring sieve section NW10 and all particles larger than the mesh size NW10 reach the sieves NW25 and NW32 in the axial direction.

Die durch die Ringsiebabschnitte 10 hindurchfallenden Partikel gelangen in den äußeren Ringraum 108. Die kleineren Partikel fallen durch die Ringsiebabschnitte NW4 hindurch. Es handelt sich erfahrungsgemäß bei dem hier in Frage kommenden Siebgut um immerhin 40 % des gesamten Siebgutes. Partikel mit einer Größe zwischen der Maschenweite 10 und 4 gelangen in axialer Richtung weiter und werden in einen zusätzlichen Sammelabschnitt aufgefangen. Dieser Anteil des Siebgutes hat etwa 20 % des gesamten Siebgutes.The particles falling through the ring sieve sections 10 enter the outer annular space 108. The smaller particles fall through the ring sieve sections NW4. Experience has shown that the screenings in question here are at least 40% of the total screenings. Particles with a size between the mesh size 10 and 4 advance in the axial direction and are collected in an additional collecting section. This portion of the screenings has about 20% of the total screenings.

Material größer als NW10 gelangt in axialer Richtung auf die Ringsiebabschnitte NW32. Die größeren Partikel gehen als Menge G32 in einen separaten Auffangbehälter, es handelt sich hierbei wiederum um ca. 20 % der Gesamtmenge. Der Anteil von der Siebgutmenge, der durch die Ringsiebabschnitte 32 hindurchfällt, wird auf die Ringsiebabschnitte NW18 und NW25 unterteilt in die Mengen mit Korngrößen 18-10 und 25-18, wobei die beiden Anteile erfahrungsgemäß jeweils 10 % betragen dürften.Material larger than NW10 reaches the ring screen sections NW32 in the axial direction. The larger particles go as quantity G32 into a separate collection container, which in turn is about 20% of the total quantity. The proportion of the amount of material to be screened which falls through the ring sieve sections 32 is divided into the ring sieve sections NW18 and NW25 into the quantities with grain sizes 18-10 and 25-18, experience having shown that the two proportions are each 10%.

Bei den gewählten Siebgrößen und den Verhältnissen ist ersichtlich, daß der empfindliche feinste Ringsiebabschnitt NW4 lediglich mit 60 % der gesamten Siebgutmenge beaufschlagt wird. Bei den nicht durch die Ringsiebabschnitte NW4 fallenden Teilen der Siebgutmenge handelt es sich um Teilchen mit nur einer geringfügig größeren Teilchengröße als der Maschenweite des Ringsiebabschnittes NW4, d.h. durch derartige Partikel wird das feinste Sieb nicht sonderlich mechanisch beansprucht.With the selected sieve sizes and the conditions, it can be seen that the sensitive, finest ring sieve section NW4 is only acted upon with 60% of the total quantity of sieved material. The parts of the quantity of material to be screened that do not fall through the ring sieve sections NW4 are particles with only a slightly larger particle size than the mesh size of the ring sieve section NW4, i.e. the finest sieve is not particularly mechanically stressed by such particles.

Es wird zusätzlich noch darauf hingewiesen, daß mit dem Siebprinzip gemäß der vorliegenden Erfindung mit Hilfe von vier Sieben Mengen herausgesiebt werden, die in fünf unterschiedliche Teilchengrößen unterteilt werden können.It is additionally pointed out that with the sieve principle according to the present invention, four sieves are used to sieve out quantities which can be divided into five different particle sizes.

Gemäß der Erfindung kann die Siebtrommel 2 auch mit geneigter Achse betrieben werden, und zwar sowohl zum einen als auch zum anderen Ende, damit das Siebgut entsprechend länger auf den Sieben verbleibt.According to the invention, the screening drum 2 can also be operated with an inclined axis, both on the one hand and on the other end, so that the material to be screened remains correspondingly longer on the screens.

Claims (1)

Siebtrommel (2) zum Konditionieren und Klassieren von körnigem Gut mit mindestens einer Eingabevorrichtung (100) an einem Stirnende der um ihre liegende Längsachse (3) drehenden Trommel und einer Ausgabe (9) des konditionierten Gutes am anderen Trommelende in einen ersten Ringraum (8) zwischen der Trommel (2) und in Trommellängsrichtung aufeinanderfolgenden, die Trommel konzentrisch umgebenden inneren Ringsiebabschnitten (NW32, NW25, NW10), wobei sich die Maschenweite der Ringsiebabschnitte derart verändert, daß der Abschnitt (NW10) mit kleinerer Maschenweite der der Ausgabe (9) axial nächste, der Abschnitt (NW32) mit der größten Maschenweite der der Ausgabe (9) axial am weitesten entfernte Ringsiebabschnitt ist, und mit an der Unterseite der Trommel (2) angeordneten Silos (6) zur Aufnahme von Siebgut unterschiedlicher Partikelgröße, dadurch gekennzeichnet, daß radial außerhalb zu den inneren Ringsiebabschnitten (NW10, NW25, NW32) die Trommel (2) konzentrisch umgebene äußere Ringsiebabschnitte (NW4, NW18) mit unterschiedlichen Maschenweiten angeordnet sind, wobei der Abschnitt (NW4) mit der kleinsten Maschenweite der der Ausgabe (9) axial nächste, der Abschnitt (NW18) mit mittlerer Maschenweite der der Ausgabe (9) axial am weitesten entfernte Ringsiebabschnitt ist und axial zwischen den äußeren Ringsiebabschnitten mit der kleinsten und der mittleren Maschenweite (NW4, NW18) ein Auffangbereich (4 - 10) für Siebgut mit einer Partikelgröße zwischen der kleineren (NW 10) und der kleinsten Maschenweite (NW 4) angeordnet ist.Sieve drum (2) for conditioning and classifying granular material with at least one input device (100) at one end of the drum rotating about its longitudinal axis (3) and an outlet (9) of the conditioned material at the other end of the drum into a first annular space (8) between the drum (2) and successive in the longitudinal direction of the drum, concentrically surrounding the inner ring screen sections (NW32, NW25, NW10), the mesh size of the ring screen sections changing in such a way that the section (NW10) with a smaller mesh size that of the output (9) axially next, the section (NW32) with the largest mesh size is the ring screen section axially the most distant from the outlet (9), and with silos (6) arranged on the underside of the drum (2) for receiving screenings of different particle sizes, characterized in that radially outside to the inner ring screen sections (NW10, NW25, NW32) the drum (2) concentrically surrounded ere ring sieve sections (NW4, NW18) are arranged with different mesh sizes, the section (NW4) with the smallest mesh size axially closest to the output (9), the section (NW18) with the medium mesh size axially the most distant Ring sieve section and axially between the outer ring sieve sections with the smallest and the middle mesh size (NW4, NW18) is a collecting area (4 - 10) for screenings with a particle size between the smaller (NW 10) and the smallest mesh size (NW 4).
EP92110438A 1991-06-29 1992-06-20 Sieve drum Expired - Lifetime EP0521361B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4121585A DE4121585C1 (en) 1991-06-29 1991-06-29
DE4121585 1991-06-29

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EP0521361A2 true EP0521361A2 (en) 1993-01-07
EP0521361A3 EP0521361A3 (en) 1993-03-10
EP0521361B1 EP0521361B1 (en) 1995-01-11

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EP (1) EP0521361B1 (en)
AT (1) ATE116875T1 (en)
DE (2) DE4121585C1 (en)
FI (1) FI94730C (en)
GB (1) GB2249271B (en)

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Publication number Priority date Publication date Assignee Title
WO2007065503A1 (en) * 2005-12-08 2007-06-14 Lintec Gmbh & Co. Kg Screening drum for screening granular material
DE102007046779A1 (en) * 2007-09-29 2009-11-12 Künkel-Wagner Prozesstechnologie GmbH Selecting an old sand stream that accumulates after casting
CN109382307A (en) * 2018-11-26 2019-02-26 南京芬钢环保科技有限公司 Steel slag preselects rotary screen and the bored slag pre-selection method of heat
CN113786925A (en) * 2021-09-10 2021-12-14 广东灿城农产品集团有限公司 Multi-stage automatic production line for agricultural product processing

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DE9206445U1 (en) * 1992-05-13 1992-10-01 Heller, Bernhard, 8201 Tuntenhausen Composter
DE19543976C2 (en) * 1995-01-18 1999-07-08 Lintec Gmbh & Co Kg Sieve drum for conditioning and classifying granular material
FI107176B (en) * 1999-01-08 2001-06-15 Saarijaerven Seudun Yrityspalv Stone heating unit
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FR2951095B1 (en) * 2009-10-09 2012-10-05 Suez Environnement PROCESS AND PLANT FOR TREATING HOUSEHOLD WASTE AND OTHER ASSIMILATED WASTE
CN103126055B (en) * 2013-03-06 2014-12-24 湖北中烟工业有限责任公司 Multistage drum screening thresher
CN103301910B (en) * 2013-06-04 2015-07-15 广西华锡集团股份有限公司 Cylinder screen for prescreening ore pulp at discharging port of ball grinder and assembling process of cylinder screen
CN103286070B (en) * 2013-06-13 2015-10-28 无锡朗特机械设备有限公司 Screw-pitch-variablehole-pitch-variable hole-pitch-variable drum screen separator
CN103286069B (en) * 2013-06-13 2015-10-28 无锡朗特机械设备有限公司 Hole-pitch-variable drum screen separator
DE102021107719B3 (en) 2021-03-26 2022-04-28 Soil2Sand UG (haftungsbeschränkt) Process for obtaining a sand-like soil building material and its use for the production of concrete
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007065503A1 (en) * 2005-12-08 2007-06-14 Lintec Gmbh & Co. Kg Screening drum for screening granular material
DE102007046779A1 (en) * 2007-09-29 2009-11-12 Künkel-Wagner Prozesstechnologie GmbH Selecting an old sand stream that accumulates after casting
CN109382307A (en) * 2018-11-26 2019-02-26 南京芬钢环保科技有限公司 Steel slag preselects rotary screen and the bored slag pre-selection method of heat
CN113786925A (en) * 2021-09-10 2021-12-14 广东灿城农产品集团有限公司 Multi-stage automatic production line for agricultural product processing
CN113786925B (en) * 2021-09-10 2022-04-12 广东灿城农产品集团有限公司 Multi-stage automatic production line for agricultural product processing

Also Published As

Publication number Publication date
DE4121585C1 (en) 1992-08-06
ATE116875T1 (en) 1995-01-15
FI920789A (en) 1992-12-30
DE59201176D1 (en) 1995-02-23
FI94730C (en) 1995-10-25
FI94730B (en) 1995-07-14
GB2249271A (en) 1992-05-06
GB9123533D0 (en) 1992-01-02
GB2249271B (en) 1993-11-17
EP0521361B1 (en) 1995-01-11
FI920789A0 (en) 1992-02-24
EP0521361A3 (en) 1993-03-10

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