EP0545144B1 - Screening drum - Google Patents
Screening drum Download PDFInfo
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- EP0545144B1 EP0545144B1 EP92119676A EP92119676A EP0545144B1 EP 0545144 B1 EP0545144 B1 EP 0545144B1 EP 92119676 A EP92119676 A EP 92119676A EP 92119676 A EP92119676 A EP 92119676A EP 0545144 B1 EP0545144 B1 EP 0545144B1
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- European Patent Office
- Prior art keywords
- built
- screening drum
- drum according
- screen
- fingers
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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
- B07B1/24—Revolving drums with fixed or moving interior agitators
Definitions
- the invention relates to a sieve drum, in particular for household waste or household waste-like commercial waste, compost, shredder scrap of any kind, with fingers attached to the inner surface of the perforated screen.
- sieve sections would take an infinitely long time to sieve a sieve practically one hundred percent. In practice, however, only finite lengths of the sieve drum are allowed, which correspond approximately to three to four times the sieve drum diameter, although the pure sieve section is somewhat less; in known drum screens for larger throughputs, for example, drum screens of 8 to 12 m in length are required.
- the sieve drums for steel shredder scrap for example, are even shorter and are only half of the values given above. So that a good screening result can be achieved, it is therefore necessary to ensure that the screenings are mixed very well by means of additional internals.
- guide and mixing blades are therefore arranged in the interior of the drum in the form of flat sheet metal strips and of different lengths, heights and, if necessary, in an inclined position.
- a screening drum of the type mentioned at the outset has become known from US Pat. No. 4,018,675.
- the internals formed there in the form of radially inward, directed against the drum axis are arranged in rows running parallel to each other.
- the cylindrical fingers should, supported by the variation of the rotational speed of the sieve drum, ensure that screenings sized in particular larger than the sieve perforation are accelerated in the sieve drum and passed to the overflow at the other end of the sieve drum.
- a screening drum with internals in the form of rectangular, web-like fingers is also known from FR 26 37 514 A1, but there for classifying granular screenings, namely grain kernels, e.g. Oats.
- granular screenings namely grain kernels, e.g. Oats.
- Several fingers arranged side by side in the inside of the screening drum form combs which are arranged parallel to the axis of the screening drum and directed radially inwards.
- EP-OS 0 008 621 So that not only a classification but also a sorting of the material to be screened can be achieved, it is known from EP-OS 0 008 621 to also provide such internals in the interior of the screen drum, which is mounted at a slightly inclined angle, in addition to storage devices in the form of an impeller crushing garbage into bales or filling in paper or plastic bags; for this purpose, crushing internals with sawtooth-shaped driver plates and baffle plates are installed, which, together with circumferential cleaning brushes arranged parallel to the axis, enable classification and sorting.
- the stowage devices result in a compact, short design of the screening drum, and the selective crushing, in particular brittle screenings, in the waste mixture such as glass, porcelain, bricks from building rubble etc., serve the baffles that fall in the falling stream of material within the drum are effective, so that the screenings can be sorted after crushing.
- a sieve drum with radially arranged on the inside of the drum, triangular impact plates for pre-comminuting the waste and with at least one storage device inside the drum has also become known from EP-PS 0 070 292.
- the sieve drum is octagonal in cross section there, and the stowage devices each consist of four rectangular sheets, one side of which is equal to the width of the octagon side and the other side of which is the catheter length of the right-angled, isosceles triangle above the octagon side.
- the rectangular sheets are arranged in one plane in such a way that a square passage opening remains free in the middle of the screening drum.
- the impact plates are offset helically in the accumulation sections between each two accumulation devices, the lower part of the direction of rotation running ahead.
- SU-A-1 143 478 it is known to provide finger or needle-like internals attached to the inner surface of the perforated screen in a sieve drum which is suitable for processing domestic waste or commercial waste similar to household waste, compost and shredder scrap. that lie in the screen surface development on straight lines running at an angle to the conveying direction.
- the aim of this is to increase the quality of the separation of the goods to be separated by separating the movement zones of a bulk, lumpy and / or tortuous goods.
- finger-like or needle-like internals in particular do not solve the problem of the formation of tufts described above (sausage formation).
- the invention has for its object to provide a design and arrangement of the internals in a screening drum, with which the above disadvantages can be avoided and an improved mode of operation results.
- three fingers form a y-shaped built-in star.
- individual fingers in the screen surface development can lie on straight lines running at an angle to the conveying direction.
- moist screenings e.g. Compost
- these fingers that are relatively long compared to their thickness (or diameter), e.g. consist of flat iron with the dimensions 150 mm x 15 mm and are 600 mm long, and especially for light, moist screenings, e.g. Compost, relatively thin and should be arranged in a more frequent distribution, can surprisingly achieve different effects at the same time.
- the material to be screened is loosened and mixed constantly, maintaining constant contact with the sieve openings and baking the material to be screened to a large extent excluded; in addition, the sieve openings not involved in the sieving process and lying in the rotating shadow are reduced to a minimum and the sausage formation of the material to be sieved is prevented by a cutting effect of the fingers acting in the direction of rotation.
- the sausage-avoiding cutting effect can be further increased if, according to a preferred embodiment of the invention, the finger pointing with its narrow side in the direction of rotation is shorter than the other two fingers of the associated built-in star.
- the shorter, wedge-shaped, leading finger also means even better mixing of the material and increased clearance of the screen openings.
- the quality of the sieve is further promoted by the fact that the built-in star in the surface of the sieve lies on straight lines that run at an angle to the conveying direction.
- the direction of inclination of the straight line is selected such that the installation star initially lying on the feed side lags in the direction of rotation with respect to those adjacent to the good discharge and lying on the same straight line.
- the built-in star is preferably arranged at the corners of the screen plates in order to increase the stability.
- Each shot preferably has a length of 1250 to 1500 mm, so that, depending on the desired length of the sieve drum, two to eight shots are generally joined together.
- the eight sieve plates mentioned per circumference and weft apply preferably to a drum diameter of 2.5 to 3.0 m.
- y-shaped built-in stars 9, each consisting of three elongated, relatively long and thin fingers 8a, 8b and 8c, are welded uniformly distributed in the area of the perforated screen 6 to the webs located between the screen openings 7 (cf. 2 to 4), namely there is a built-in star 9 in each corner of a screen plate 10.
- a finger 8a which is shorter than the other two fingers 8b and 8c of the built-in star 9, is in each case with its free, narrow end face in the direction of rotation 11 or 12 (the direction of rotation arrow 12 is shown in dashed lines in FIG. 1) pointing perpendicular to the central axis 5.
- an angle iron can also be used for the fingers 8b and 8c of each built-in star 9.
- the built-in star can also be produced as cast steel parts.
- twelve y-shaped built-in stars 9 are provided, in an arrangement in which three built-in stars 9 each lie on the straight lines 13, 13a extending at an angle ⁇ to the conveying direction in the screen surface processing, and each of the fingers 8a in Direction of rotation 11 or 12 points.
- the installation star 9 is as in FIG. 1 with solid lines and in FIG. 2 as a detail shown in the form of an upside down Y arranged on the straight line 13.
- the drum rotates in the direction of the directional arrow 12 shown in dashed lines in FIG. 1, the installation stars are shown in dashed lines in FIG. 1 and, as a detail in FIG.
- the built-in star 9 is placed in the screen plate corners.
- the number of screen plates 10 (lengthways and over the circumference) differs according to the different drum dimensions. The number of built-in stars 9 thus changes, but the arrangement described is retained.
- the material to be screened is constantly loosened and mixed on its way from the entry 3 to the discharge 4 without losing contact with the screen openings 7.
- the sieve openings 7, which are not involved in the sieving process due to the installation star 9, are reduced to a minimum, and in the direction of rotation there is a cutting effect which prevents the sausage from forming the sieved material (see FIG. 3).
- the installation star 9 are preferably used for shredder scrap and all materials that contain heavy parts and inhomogeneous large parts, e.g. Garbage and untreated incinerator slag.
- the type of internals according to the invention is selected essentially as a function of the feed material, but also taking into account the sieve hole diameter required for the desired sieve passage.
- the built-in star 9 is particularly suitable for sieve hole diameters ⁇ 40 mm.
Description
Die Erfindung betrifft eine Siebtrommel, insbesondere für Hausmüll oder hausmüllähnlichen Gewerbemüll, Kompost, Shredderschrott jeder Art, mit auf der Innenfläche des Lochsiebes befestigten Fingern.The invention relates to a sieve drum, in particular for household waste or household waste-like commercial waste, compost, shredder scrap of any kind, with fingers attached to the inner surface of the perforated screen.
Um ein Siebgut praktisch hundertprozentig abzusieben, bedürfte es im Grunde unendlich langer Siebstrecken. Die Praxis erlaubt aber nur endliche Längen der Siebtrommel, die etwa dem drei- bis vierfachen Siebtrommeldurchmesser entsprechen, wobei allerdings die reine Siebstrecke etwas geringer ist; bei bekannten Trommelsieben für größere Durchsatzleistungen werden beispielsweise Trommelsiebe von 8 bis 12 m Länge benötigt. Aus Aufstellungs- und Kostengründen sowie vor allem wegen des sehr hohen, die Laufräder der Siebtrommel belastenden Eigengewichtes des Siebgutes sind beispielsweise die Siebtrommeln für Stahl-Shredderschrott sogar noch kürzer und betragen lediglich die Hälfte der oben angegebenen Werte. Damit sich ein gutes Siebergebnis erreichen läßt, ist es daher erforderlich, durch zusätzliche Einbauten dafür zu sorgen, daß das Siebgut sehr gut gemischt wird. In der Regel sind deshalb im Trommelinnern Leit- und Mischschaufeln in Form von flachen Blechstreifen sowie unterschiedlicher Länge, Höhe und gegebenenfalls in Schräglage angeordnet.Basically, sieve sections would take an infinitely long time to sieve a sieve practically one hundred percent. In practice, however, only finite lengths of the sieve drum are allowed, which correspond approximately to three to four times the sieve drum diameter, although the pure sieve section is somewhat less; in known drum screens for larger throughputs, for example, drum screens of 8 to 12 m in length are required. For setup and cost reasons, and above all because of the very high weight of the material to be screened, which weighs on the impellers of the sieve drum, the sieve drums for steel shredder scrap, for example, are even shorter and are only half of the values given above. So that a good screening result can be achieved, it is therefore necessary to ensure that the screenings are mixed very well by means of additional internals. As a rule, guide and mixing blades are therefore arranged in the interior of the drum in the form of flat sheet metal strips and of different lengths, heights and, if necessary, in an inclined position.
Eine Siebtrommel der eingangs genannten Art ist durch die US 4 018 675 A bekanntgeworden. Die dort in Form von radial nach innen, gegen die Trommelachse gerichteten Fingern ausgebildeten Einbauten sind in parallel zueinander verlaufenden Reihen angeordnet. Die zylindrischen Finger sollen, unterstützt durch das Variieren der Rotationsgeschwindigkeit der Siebtrommel, dafür sorgen, daß insbesondere größer als die Sieblochung bemessenes Siebgut in der Siebtrommel beschleunigt und zum Überlauf am anderen Siebtrommelende hindurchgeführt wird.A screening drum of the type mentioned at the outset has become known from US Pat. No. 4,018,675. The internals formed there in the form of radially inward, directed against the drum axis are arranged in rows running parallel to each other. The cylindrical fingers should, supported by the variation of the rotational speed of the sieve drum, ensure that screenings sized in particular larger than the sieve perforation are accelerated in the sieve drum and passed to the overflow at the other end of the sieve drum.
Eine Siebtrommel mit Einbauten in Form von rechteckigen, stegartigen Fingern ist weiterhin aus der FR 26 37 514 A1 bekannt, dort allerdings zum Klassieren von körnigem Siebgut, nämlich Getreidekörnern, z.B. Hafer. Mehrere im Innern der Siebtrommel nebeneinander angeordnete Finger bilden Kämme, die parallel zur Achse der Siebtrommel radial nach innen gerichtet angeordnet sind.A screening drum with internals in the form of rectangular, web-like fingers is also known from FR 26 37 514 A1, but there for classifying granular screenings, namely grain kernels, e.g. Oats. Several fingers arranged side by side in the inside of the screening drum form combs which are arranged parallel to the axis of the screening drum and directed radially inwards.
Damit sich nicht nur eine Klassierung, sondern gleichzeitig eine Sortierung des Siebgutes erreichen läßt, ist es aus der EP-OS 0 008 621 bekannt, im Innern der im Betrieb etwas schräg geneigt gelagerten Siebtrommel neben Staueinrichtungen in Form eines Flügelrades außerdem solche Einbauten vorzusehen, die zu Ballen gepreßten oder in Papier- oder Plastiksäcken abgefüllten Müll zerkleinern; dazu sind Zerkleinerungs-Einbauten mit sägezahnförmigen Mitnehmerplatten und Prallbleche eingebaut, die zusammen mit achsparallel angeordneten, umlaufenden Reinigungsbürsten ein Klassieren und Sortieren ermöglichen. Durch die Staueinrichtungen ergibt sich eine kompakte, kurze Bauweise der Siebtrommel, und dem selektiven Zerkleinern, insbesondere spröder Siebgut-Stoffe im Abfallgemisch wie Glas, Porzellan, Ziegelsteine aus Bauschutt etc., dienen die Prallflächen, die im herabfallenden Gutstrom innerhalb der Trommel wirksam sind, so daß sich das Siebgut nach dem Zerkleinern sortieren läßt.So that not only a classification but also a sorting of the material to be screened can be achieved, it is known from EP-OS 0 008 621 to also provide such internals in the interior of the screen drum, which is mounted at a slightly inclined angle, in addition to storage devices in the form of an impeller crushing garbage into bales or filling in paper or plastic bags; for this purpose, crushing internals with sawtooth-shaped driver plates and baffle plates are installed, which, together with circumferential cleaning brushes arranged parallel to the axis, enable classification and sorting. The stowage devices result in a compact, short design of the screening drum, and the selective crushing, in particular brittle screenings, in the waste mixture such as glass, porcelain, bricks from building rubble etc., serve the baffles that fall in the falling stream of material within the drum are effective, so that the screenings can be sorted after crushing.
Eine Siebtrommel mit radial an der Trommelinnenseite angeordneten, dreieckförmigen Aufprallblechen zur Vorzerkleinerung des Mülls und mit mindestens einer Staueinrichtung im Trommelinnern ist weiterhin durch die EP-PS 0 070 292 bekanntgeworden. Die Siebtrommel ist dort im Querschnitt achteckig, und die Staueinrichtungen bestehen jeweils aus vier Rechteckblechen, deren eine Seite gleich der Breite der Achteckseite und deren andere Seite gleich der Kathetenlänge des rechtwinkligen, gleichschenkligen Dreiecks über der Achteckseite ist. Die Rechteckbleche sind in einer Ebene derart angeordnet, daß in der Mitte der Siebtrommel eine quadratische Durchtrittsöffnung freibleibt. Die Aufprallbleche sind in den Staustrecken zwischen jeweils zwei Staueinrichtungen schraubenlinienförmig versetzt, wobei der niedrigere Teil der Drehrichtung vorausläuft.A sieve drum with radially arranged on the inside of the drum, triangular impact plates for pre-comminuting the waste and with at least one storage device inside the drum has also become known from EP-PS 0 070 292. The sieve drum is octagonal in cross section there, and the stowage devices each consist of four rectangular sheets, one side of which is equal to the width of the octagon side and the other side of which is the catheter length of the right-angled, isosceles triangle above the octagon side. The rectangular sheets are arranged in one plane in such a way that a square passage opening remains free in the middle of the screening drum. The impact plates are offset helically in the accumulation sections between each two accumulation devices, the lower part of the direction of rotation running ahead.
Bei den bekannten Siebtrommeln haben sich jedoch verschiedene Nachteile herausgestellt. Da aufgrund der bekannten Anordnung und Gestaltung viele Sieböffnungen im Drehschatten der Einbauten liegen, können sich diese Sieböffnungen nicht mehr an der Absiebung beteiligen, was einer Reduzierung der freien Siebfläche gleichkommt. Das gemischte Siebgut wird zwar in Drehrichtung der Siebtrommel mitgenommen, jedoch trifft es bei normal befüllter Trommel beim Herabfallen nicht die Sieböffnungen, sondern fällt auf das andere Siebgut bzw. auf die Einbauten. Kritische, zum Anbacken neigende Siebgüter (u.a. feuchte Materialien, Komposte) verursachen im Drehschatten der Einbauten häufig unerwünschte Anbackungen, die nach einer gewissen Betriebszeit einen Großteil der Sieböffnungen völlig verschließen. Siebgüter, die dazu neigen, sich ineinander zu verkrallen, wie insbesondere Stahl-Shredderschrott, bilden Siebgutbüschel (Wurstbildung), die sich in Trommel-Längsrichtung drehen; dieser Effekt wird vor allem durch schaufelartige Einbauten eher noch begünstigt als verringert.Various disadvantages have been found in the known screening drums. Since, due to the known arrangement and design, there are many screen openings in the rotating shadow of the internals, these screen openings can no longer participate in the screening, which is equivalent to a reduction in the free screen area. The mixed screenings are taken along in the direction of rotation of the screening drum, but with a normally filled drum it does not hit the screen openings when falling down, but falls on the other screenings or on the internals. Critical screenings that tend to cake (including moist materials, composts) often cause undesirable caking in the rotating shade of the internals, which completely closes a large part of the screen openings after a certain operating time. Screenings that tend to cling to each other, such as steel shredder scrap, form clusters of screenings (sausage formation) which rotate in the longitudinal direction of the drum; This effect is particularly favored rather than reduced by shovel-like installations.
Nach der SU-A-1 143 478 ist es bekannt, in eine Siebtrommel, die für die Aufbereitung von Hausmüll oder hausmüllähnlichem Gewerbemüll, Kompost sowie Shredderschrott jeder Art geeignet ist, auf der Innenfläche des Lochsiebes befestigte, finger- bzw. nadelartige Einbauten vorzusehen, die in der Siebflächenabwicklung auf im Winkel zur Förderrichtung verlaufenden Geraden liegen. Damit soll eine Qualitätserhöhung der Trennung des zu separierenden Gutes durch die Trennung der Bewegungszonen eines Schütt-, stückigen und/oder gewundenen Gutes erzielt werden.
Es hat sich jedoch in praktischen Versuchen gezeigt, daß allein finger- bzw. nadelartige Einbauten insbesondere das Problem der oben beschriebenen Büschelbildung (Wurstbildung) nicht lösen.According to SU-A-1 143 478, it is known to provide finger or needle-like internals attached to the inner surface of the perforated screen in a sieve drum which is suitable for processing domestic waste or commercial waste similar to household waste, compost and shredder scrap. that lie in the screen surface development on straight lines running at an angle to the conveying direction. The aim of this is to increase the quality of the separation of the goods to be separated by separating the movement zones of a bulk, lumpy and / or tortuous goods.
However, it has been shown in practical experiments that finger-like or needle-like internals in particular do not solve the problem of the formation of tufts described above (sausage formation).
Der Erfindung liegt die Aufgabe zugrunde, bei einer Siebtrommel eine Gestaltung und Anordnung der Einbauten vorzusehen, mit denen sich die vorstehenden Nachteile vermeiden lassen und sich eine verbesserte Betriebsweise ergibt.The invention has for its object to provide a design and arrangement of the internals in a screening drum, with which the above disadvantages can be avoided and an improved mode of operation results.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß jeweils drei Finger einen y-förmigen Einbaustern bilden. Bei einer zweckmäßigen Ausführung können einzelne Finger in der Siebflächenabwicklung auf im Winkel zur Förderrichtung verlaufenden Geraden liegen. Mit diesen Fingern, die im Vergleich zu ihrer Dicke (bzw. Durchmesser) relativ lang sind, z.B. aus Flacheisen mit den Abmessungen 150 mm x 15 mm bestehen und 600 mm lang sind, und insbesondere bei leichtem, feuchtem Siebgut, z.B. Kompost, relativ dünn und in häufigerer Verteilung angeordnet sein sollten, lassen sich überraschend verschiedene Wirkungen gleichzeitig erzielen. Das Siebgut wird nämlich ständig aufgelockert und gemischt, dabei ein ständiger Bewegungskontakt zu den Sieböffnungen aufrechterhalten und ein Anbacken des Siebgutes weitestgehend ausgeschlossen; außerdem werden die nicht am Siebvorgang beteiligten, im Drehschatten liegenden Sieböffnungen auf ein Minimum reduziert und wird durch einen in Drehrichtung wirkenden Schneide-Effekt der Finger die Wurstbildung des Siebgutes verhindert.This object is achieved in that three fingers form a y-shaped built-in star. In an expedient embodiment, individual fingers in the screen surface development can lie on straight lines running at an angle to the conveying direction. With these fingers that are relatively long compared to their thickness (or diameter), e.g. consist of flat iron with the dimensions 150 mm x 15 mm and are 600 mm long, and especially for light, moist screenings, e.g. Compost, relatively thin and should be arranged in a more frequent distribution, can surprisingly achieve different effects at the same time. The material to be screened is loosened and mixed constantly, maintaining constant contact with the sieve openings and baking the material to be screened to a large extent excluded; in addition, the sieve openings not involved in the sieving process and lying in the rotating shadow are reduced to a minimum and the sausage formation of the material to be sieved is prevented by a cutting effect of the fingers acting in the direction of rotation.
Mit den drei zu einem y-förmigen Einbaustern zusammengesetzten Fingern, wobei vorzugsweise ein Finger jedes Einbausterns mit seiner Schmalseite in Drehrichtung weist, lassen sich vor allem für schweres Siebgut (z.B. Shredderschrott) geeignete, wirkungsvolle und stabile Einbauten erreichen, wobei der Wurstbildungen vermeidende Schneideffekt noch dadurch vergrößert werden kann, wenn nach einem bevorzugten Ausführungsbeispiel der Erfindung der mit seiner Schmalseite in Drehrichtung weisende Finger kürzer ist als die beiden übrigen Finger des zugehörigen Einbausterns. Mit dem kürzeren, keilförmigen, voreilenden Finger ist auch eine noch bessere Gutdurchmischung und ein gesteigertes Freihalten der Sieböffnungen verbunden.With the three fingers assembled to form a y-shaped built-in starter, preferably one finger of each built-in star with its narrow side pointing in the direction of rotation, suitable, especially for heavy screenings (eg shredder scrap) achieve effective and stable internals, the sausage-avoiding cutting effect can be further increased if, according to a preferred embodiment of the invention, the finger pointing with its narrow side in the direction of rotation is shorter than the other two fingers of the associated built-in star. The shorter, wedge-shaped, leading finger also means even better mixing of the material and increased clearance of the screen openings.
Bei Einbausternen, die eine mindestens dem 0,2-fachen Trommeldurchmesser entsprechende Länge besitzen, läßt sich eine optimierte, für ein ständiges Auflockern und Mischen sorgende Betriebsweise der Siebtrommel erreichen.In the case of built-in stars which have a length corresponding to at least 0.2 times the drum diameter, an optimized mode of operation of the sieve drum which ensures constant loosening and mixing can be achieved.
Schließlich wird die Siebgüte noch dadurch gefördert, daß die Einbausterne in der Siebflächenabwicklung auf im Winkel zur Förderrichtung verlaufenden Geraden liegen, die sich im Falle eines aus mehreren Teilen zusammengesetzten Lochsiebes aus der Anzahl der das Lochsieb bildenden Siebbleche (trommelgrößenabhängig) ergeben. Dabei ist die Neigungsrichtung der Geraden so gewählt, daß die der Gutaufgabeseite zunächst liegenden Einbausterne gegenüber den dem Gutaustrag benachbarten, auf derselben Geraden liegenden in Drehrichtung nacheilen. Vorzugsweise sind die Einbausterne an den Ecken der Siebbleche angeordnet, um die Stabilität zu erhöhen.Finally, the quality of the sieve is further promoted by the fact that the built-in star in the surface of the sieve lies on straight lines that run at an angle to the conveying direction. The direction of inclination of the straight line is selected such that the installation star initially lying on the feed side lags in the direction of rotation with respect to those adjacent to the good discharge and lying on the same straight line. The built-in star is preferably arranged at the corners of the screen plates in order to increase the stability.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung, in der Ausführungsbeispiele des Gegenstandes der Erfindung anhand der Zeichnung näher erläutert sind. Es zeigen:
- Fig. 1
- eine mit erfindungsgemäßen Einbauten in Form von y-förmigen Einbausternen versehene Siebtrommel, abgewickelt dargestellt,
- Fig. 2
- als Einzelheit vergrößert den in Fig. 1 strichpunktiert eingekreisten und mit "A" bezeichneten Trommelausschnitt,
- Fig. 3
- eine Seitenansicht des Gegenstandes der Fig. 2 und
- Fig. 4
- als Einzelheit vergrößert den in Fig. 1 strichpunktiert eingekreisten und mit "B" bezeichneten Trommelabschnitt.
- Fig. 1
- a screen drum provided with internals according to the invention in the form of y-shaped built-in stars, shown unwound,
- Fig. 2
- as a detail enlarges the drum cutout, which is circled in dash-dot lines in FIG. 1 and is labeled "A",
- Fig. 3
- a side view of the object of FIGS. 2 and
- Fig. 4
- as a detail, the drum section circled in FIG. 1 and designated by "B" is enlarged.
Eine über nicht dargestellte Mittel angetriebene Siebtrommel 1, von der in den Fig. 1 und 5 lediglich ihr abgewickelter Trommelmantel 2 gezeigt ist, besitzt einen Siebguteintrag 3 und einen Siebgutaustrag 4. Die drehbare, eine zum Siebgutaustrag 4 hin vorzugsweise geneigte Mittelachse 5 aufweisende Siebtrommel 1 ist von einem feststehenden, zylindrischen Gehäuse (nicht dargestellt) gekapselt. Das zwischen dem Siebguteintrag 3 und dem Siebgutaustrag 4 befindliche Lochsieb 6 ist mit zahlreichen kreisförmigen Sieböffnungen 7 versehen (vgl. die Fig. 2 und 4) und besteht gemäß Fig. 1 aus zwei (Zylinder-)Schüssen, von denen jeder aus acht mit ihrer Längsachse in Förderrichtung angeordneten Siebblechen 10 zusammengesetzt ist. Jeder Schuß besitzt bevorzugt eine Länge von 1250 bis 1500 mm, so daß je nach gewünschter Siebtrommellänge im allgemeinen zwei bis acht Schüsse aneinandergefügt werden. Dabei gelten die erwähnten acht Siebbleche pro Umfang und Schuß vorzugsweise für einen Trommeldurchmesser von 2,5 bis 3,0 m.A
Im Innern der Siebtrommel 2 sind gemäß Fig. 1 mehrere aus jeweils drei länglichen, relativ langen und dünnen Fingern 8a, 8b und 8c bestehende y-förmige Einbausterne 9 im Bereich des Lochsiebes 6 an den zwischen den Sieböffnungen 7 befindlichen Stegen gleichmäßig verteilt angeschweißt (vgl. Fig. 2 bis 4), und zwar befindet sich ein Einbaustern 9 jeweils in einer Ecke eines Siebbleches 10. Ein Finger 8a, der kürzer als die beiden anderen Finger 8b und 8c des Einbausterns 9 ist, ist jeweils mit seiner freien, schmalen Stirnseite in Drehrichtung 11 bzw. 12 (der Drehrichtungspfeil 12 ist in Fig. 1 gestrichelt dargestellt) weisend senkrecht zur Mittelachse 5 angeordnet. Anstatt einzelner Flacheisen kann für die Finger 8b und 8c jedes Einbausterns 9 auch ein Winkeleisen verwendet werden. Im Rahmen der Erfindung können die Einbausterne auch als Stahlgußteile hergestellt sein.1, several y-shaped built-in
Bei der Verteilung gemäß Fig. 1 sind zwölf y-förmige Einbausterne 9 vorgesehen, und zwar in einer Anordnung, bei der in der Siebflächenabwicklung jeweils drei Einbausterne 9 auf im Winkel α zur Förderrichtung verlaufenden Geraden 13, 13a liegen und wobei jeweils der Finger 8a in Drehrichtung 11 bzw. 12 weist. Dreht sich die Siebtrommel 1 in Richtung des mit durchgezogenen Linien dargestellten Drehrichtungspfeils 11, so sind die Einbausterne 9 wie in Fig. 1 mit durchgezogenen Linien und in Fig. 2 als Einzelheit dargestellt in Form eines auf den Kopf gestellten Y auf der Geraden 13 angeordnet. Dreht sich die Trommel hingegen in Richtung des in Fig. 1 gestrichelt eingezeichneten Richtungspfeils 12, so sind die Einbausterne wie in Fig. 1 gestrichelt und in Fig. 4 als Einzelheit dargestellt in Y-Ausrichtung auf der Geraden 13a angeordnet. Aus Stabilitätsgründen werden die Einbausterne 9 in die Siebblechecken plaziert. Die Anzahl der Siebbleche 10 (längs und über dem Umfang) ist entsprechend den verschiedenen Trommelabmessungen unterschiedlich. Damit ändert sich zwar die Anzahl der Einbausterne 9, die beschriebene Anordnung bleibt jedoch erhalten.In the distribution according to FIG. 1, twelve y-shaped built-in
Durch die beschriebene Gestaltung und Anordnung der Finger 8 bzw. Einbausterne 9 wird das Siebgut auf seinem Weg vom Eintrag 3 zum Austrag 4 hin ständig aufgelockert und durchmischt, ohne dabei den Kontakt zu den Sieböffnungen 7 zu verlieren. Die aufgrund der Einbausterne 9 nicht am Siebvorgang beteiligten, sich im Drehschatten befindenden Sieböffnungen 7 sind auf ein Minimum reduziert, und in Drehrichtung ergibt sich ein die Wurstbildung des Siebgutes verhindernder Schneideeffekt (vgl. Fig.3).Due to the described design and arrangement of the fingers 8 or built-in
Die Einbausterne 9 werden bevorzugt für Shredderschrott und alle Materialien verwendet, die Schwerteile und inhomogene Großteile enthalten, z.B. Müll und unvorbehandelte Müllverbrennungsschlacke.The
Wie bereits erwähnt, wird die Art der erfindungsgemäßen Einbauten im wesentlichen in Abhängigkeit vom Aufgabegut gewählt, jedoch auch unter Berücksichtigung der für den gewünschten Siebdurchgang erforderlichen Sieblochdurchmesser. So sind die Einbausterne 9 besonders für Sieblochdurchmesser ≧ 40 mm geeignet.As already mentioned, the type of internals according to the invention is selected essentially as a function of the feed material, but also taking into account the sieve hole diameter required for the desired sieve passage. The built-in
Claims (10)
- A screening drum, in particular for domestic waste or domestic-type industrial waste, compost as well as all types of shredder materials, with fingers attached to the interior surface of the punched screen, characterized in that three fingers respectively (8a, 8b, 8c) form a y-shaped built-in star (9).
- A screening drum according to claim 1, characterized in that in the rotating screen surface the individual built-in stars (9) are located on straight lines at an angle (a) to the direction of conveying (13, 13a).
- A screening drum according to claims 1 or 2, characterized in that the fingers (8) consist of flat steel, with their longitudinal axis pointing to the rotational axis (5) of the screening drum (1).
- A screening drum according to one of claims 1 to 3, characterized in that the small side of one finger (8a) of each built-in star (9) points to the direction of rotation (11 or 12 respectively).
- A screening drum according to claim 4, characterized in that the finger (8a) whose small side points to the direction of rotation (11 or 12 respectively) is shorter than the two remaining fingers (8b, 8c) of the said built-in star (9).
- A screening drum according to claim 5, characterized in that the shorter finger (8a) at its upper, free face is bevelled in the shape of a wedge, in the direction of rotation.
- A screening drum according to one of claims 1 to 6, characterized in that the length of the fingers (14) or of the built-in stars (8 or 9) respectively, is at least equal to 0.2 times the drum diameter.
- A screening drum according to one of claims 1 to 7, characterized by an inclination (13, 13a) of the straight-line in which the built-in stars (9) located closest to the inlet side (3) follows those built-in stars (9) located closest to the retaining side (4) in the direction of rotation (11 or 12) along the same straight line (13, 13a).
- A screening drum according to one of claims 1 to 8, characterized in that the punched screen (6) consists of several screen panels (10).
- A screening drum according to one of claims 1 to 9, characterized in that at least one built-in star (9) each is located in at least one corner of the screen panels (10) comprising the punched screen (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4140343 | 1991-12-06 | ||
| DE4140343A DE4140343C2 (en) | 1991-12-06 | 1991-12-06 | Sieve drum |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0545144A2 EP0545144A2 (en) | 1993-06-09 |
| EP0545144A3 EP0545144A3 (en) | 1994-05-18 |
| EP0545144B1 true EP0545144B1 (en) | 1997-03-12 |
Family
ID=6446487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92119676A Expired - Lifetime EP0545144B1 (en) | 1991-12-06 | 1992-11-19 | Screening drum |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0545144B1 (en) |
| DE (2) | DE4140343C2 (en) |
| ES (1) | ES2041225T3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4335401C2 (en) * | 1993-10-18 | 1995-11-23 | Bfi Entsorgungstech | Separator and use of the same |
| AT2514U1 (en) * | 1997-12-17 | 1998-12-28 | Burgstaller Gmbh H | SCREEN DRUM FOR DRUM SCREENING MACHINE |
| EP3533525B1 (en) * | 2018-02-28 | 2023-01-11 | Senro B.V. | Waste separation device |
| NL2021040B1 (en) * | 2018-02-28 | 2019-08-30 | Senro B V | WASTE SEPARATION DEVICE |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4018675A (en) * | 1975-05-19 | 1977-04-19 | Petrucci Ben G | Waste sorting machine |
| SU778816A1 (en) * | 1976-01-12 | 1980-11-15 | Управление Строительства Нурекской Гэс "Нурекгэсстрой" | Apparatus for separating loose materials by side |
| DE2839604A1 (en) * | 1978-09-12 | 1980-03-13 | Peter Voelskow | DRUM SCREEN |
| DE3102846A1 (en) * | 1981-01-29 | 1982-08-19 | Mannesmann Veba Umwelttechnik GmbH, 4690 Herne | SCREEN DRUM FOR MUELL AND METHOD FOR THEIR OPERATION |
| SU1143478A1 (en) * | 1983-07-27 | 1985-03-07 | Всесоюзный Научно-Исследовательский И Проектный Институт Вторичных Цветных Металлов | Separator for dissociating lump,loose and bindweed-like materials |
| DE8805674U1 (en) * | 1988-04-29 | 1988-09-15 | Dederichs, Knut, 2059 Broehten, De | |
| FR2637514B1 (en) * | 1988-10-12 | 1991-11-08 | Marot Ste Nle Emile | CEREAL GRAIN CALIBRATION MACHINE, OF THE TYPE INCLUDING A ROTATING SCREEN |
-
1991
- 1991-12-06 DE DE4140343A patent/DE4140343C2/en not_active Expired - Fee Related
-
1992
- 1992-11-19 DE DE59208173T patent/DE59208173D1/en not_active Expired - Fee Related
- 1992-11-19 ES ES92119676T patent/ES2041225T3/en not_active Expired - Lifetime
- 1992-11-19 EP EP92119676A patent/EP0545144B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59208173D1 (en) | 1997-04-17 |
| ES2041225T3 (en) | 1997-08-16 |
| EP0545144A3 (en) | 1994-05-18 |
| DE4140343A1 (en) | 1993-06-09 |
| EP0545144A2 (en) | 1993-06-09 |
| DE4140343C2 (en) | 1993-09-30 |
| ES2041225T1 (en) | 1993-11-16 |
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