EP0976442A2 - Mixing device - Google Patents

Mixing device Download PDF

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Publication number
EP0976442A2
EP0976442A2 EP99114782A EP99114782A EP0976442A2 EP 0976442 A2 EP0976442 A2 EP 0976442A2 EP 99114782 A EP99114782 A EP 99114782A EP 99114782 A EP99114782 A EP 99114782A EP 0976442 A2 EP0976442 A2 EP 0976442A2
Authority
EP
European Patent Office
Prior art keywords
mixing device
wear
mixing
arms
bucket
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Withdrawn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
EP99114782A
Other languages
German (de)
French (fr)
Other versions
EP0976442A3 (en
Inventor
Franz Zettl
Stefan Dr. Zettl
Jorg Schwingel
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.)
F Zettl & Co GmbH
Original Assignee
F Zettl & Co GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE29820936U external-priority patent/DE29820936U1/en
Application filed by F Zettl & Co GmbH filed Critical F Zettl & Co GmbH
Publication of EP0976442A2 publication Critical patent/EP0976442A2/en
Publication of EP0976442A3 publication Critical patent/EP0976442A3/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05Stirrers
    • B01F27/051Stirrers characterised by their elements, materials or mechanical properties
    • B01F27/052Stirrers with replaceable wearing elements; Wearing elements therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05Stirrers
    • B01F27/07Stirrers characterised by their mounting on the shaft
    • B01F27/071Fixing of the stirrer to the shaft
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01FMIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms

Definitions

  • the invention relates to a mixing device with a mixing drum and one the ends of the mixing drum mounted mixer shaft, the mixer shaft itself has radially outwardly extending blade arms, at the ends of which are close to Blades reaching to the mixing drum wall are arranged.
  • Such mixing devices are already known from the prior art. she are operated continuously or discontinuously. These are typical Solid mixers, which are also used as mixing granulators. In continuous Operation can process high mass flows with these mixers become. When processing high mass flows, however, those are from the mixer shaft outgoing bucket arms or the bucket blades with high wear protection exposed. This leads to the use of a common material to produce the mixing device for undesirable abrasions.
  • the object of the invention is therefore to provide a generic mixing device of this type to further develop that even with the processing of high mass flows with abrasive Material the service life of the entire mixing device can be increased.
  • the wear protection of the airfoils preferably consists of a Hard overlay welding from tungsten carbide, in particular from spherically melted Tungsten carbide.
  • support plates can be welded onto the free ends of the bucket arms to which the blades can be screwed.
  • the central axes of the airfoils can in relation to the associated airfoil arms be inclined at an angle.
  • the blade arms can each be wear-resistant by means of a casing surrounding them Sleeve. It is precisely through this measure that wear protection becomes the mixing device significantly increased. Basically, the bucket arm could can also be provided with wear protection itself. But this would cause the bucket arm to no longer have the necessary ductility would, which is necessary to absorb impact loads from rough parts that are in the mixing goods can be endured.
  • Wear-resistant Sleeve becomes the function of the wear-resistant surface on the one hand and the necessary Ductility of the bucket arm, on the other hand, ideally with one another united.
  • the sleeve can preferably be made of a weldable steel, for example one ST 37, consist of a hard overlay made of wear-resistant material, preferably made of spherically melted tungsten carbide.
  • these receiving sleeves can be used be welded into which the bucket arms can be inserted and where these are attachable.
  • the sleeve can be fixed on the respective bucket arm using clamping screws his.
  • the sleeve is According to a preferred embodiment, it is shorter than the free length of the Bucket arms, as they can be moved by loosening the respective clamping screws is. The sleeve can therefore be pushed back to disassemble the blades to release the lower edge of the airfoil.
  • a two-part and replaceable shaft protection sleeve can also be used be provided as wear protection for the mixer shaft.
  • the receiving sleeves for the bucket arms i.e. the so-called Bucket arm pockets to be armored using wear protection plates.
  • a protective roof can be realized.
  • the abrasive product falling from above is deflected in such a way so that it can no longer fall directly onto the mixer shaft.
  • this canopy in the filler neck is also made of wear-resistant material exist or be coated with wear-resistant material.
  • 1 shows a mixing device 22, which is formed by a mixing drum. Inside the mixing drum 22 extends centrally at the ends of the Mixing drum 22 mounted mixer shaft 23, which by means of its own motor M is drivable.
  • the mixing blades 25 also have airfoils, the central axes 26 opposite the associated blade arms 24 (i.e. their longitudinal extent) with an angle ⁇ forward, i.e. in the direction of movement, and are inclined upwards.
  • angle ⁇ forward, i.e. in the direction of movement, and are inclined upwards.
  • the blade arm 24 consists of a ductile steel, for example an ST 52.
  • the bucket arm has a sufficiently high ductility to withstand blows Endure coarse parts in the mix.
  • the airfoil 38 has a hard overlay weld made of spherically melted tungsten carbide on Falls die Blade 38 are worn, they can be easily screwed to the Support plate 36 are replaced.
  • a wear-resistant sleeve 40 is mounted on the blade arm 24 . This can be done using clamping screws 42, 44 be determined.
  • the wear-resistant sleeve is made of a ductile steel that has a hard surfacing of tungsten carbide.
  • the sleeve 40 is dimensioned somewhat shorter than the length of the bucket arm 24. This allows the sleeve 40 from its normal Operating position, as shown in Fig. 5, in an exchange position, as it 4 is shifted. In the replacement position according to Fig. 4, the sleeve 40 releases the lower edge of the airfoil 38 so that the airfoil 38 is removable from the support plate 36.
  • the mixer shaft 23 is also surrounded with wear protection.
  • the wear protection is characterized here by exchangeable shaft protection sleeves 54 Special steel formed. These shaft protection sleeves serve to protect the mixer shaft 23 against abrasive wear.
  • shovel arm pockets 58 into which those not shown in FIG. 6 are shown Bucket arms 24 can be used are in the embodiment shown here provided with wear protection plates 50 and 52.
  • the shaft protection sleeves 54 are placed around the shaft 23, with cutouts 56 one Allow bucket arm pockets 58 to pass through.
  • a screw connection is made with armored screws 60.
  • the protective sleeves are secured against twisting 54 through the shovel pockets 58.
  • Buckets of screwed wear protection 50 and 52 of the bucket pocket 58 has elongated holes so that they are adjustable against the shaft protection sleeve 54 and prevent relative movements to the mixer shaft 23.
  • the bucket arm pocket 58 is also in the rear Area occupied. Therefore here is corresponding to the wear protection 50 in the front area also a wear plate 52 in the rear area executed.
  • FIG. 7 shows a front view of the mixing device according to the invention. From this illustration it can be seen that in the filler neck 29 a tapered Canopy 80 is executed in the mine of the filler neck is arranged that it is the mixer shaft 23, which is arranged in the mixing drum 22 is foreclosed. Thus, the wearing end filled through the filler neck 29 Product be distracted so that it is no longer directly on the mixer shaft 23 falls.
  • the canopy 80 can also be made of wear-resistant material consist.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

Tungsten carbide is used as a wear resistant material, which is applied to the blade by welding. The rotor arm (24) projects radially from a rotor shaft (23) and holds a carrier (36) on which the mixer blade (38) is fitted. The carrier and blade are angled relative to the rotor arm axis. All items are joined demountably through bolts (34, 42, 44) for adjustment and replacement. The rotor arm is also protected by a tungsten carbide coated sleeve (40). A welded coating is preferred to a solid tungsten carbide part to retain the flexibility of the base metal, necessary to cope with shock loading.

Description

Die Erfindung betrifft eine Mischvorrichtung mit einer Mischtrommel und einer an den Enden der Mischtrommel gelagerten Mischerwelle, wobei die Mischerwelle sich radial nach außen erstreckende Schaufelarme aufweist, an deren Enden bis nahe zur Mischtrommelwand reichende Schaufelblätter angeordnet sind.The invention relates to a mixing device with a mixing drum and one the ends of the mixing drum mounted mixer shaft, the mixer shaft itself has radially outwardly extending blade arms, at the ends of which are close to Blades reaching to the mixing drum wall are arranged.

Derartige Mischvorrichtungen sind bereits aus dem Stand der Technik bekannt. Sie werden kontinuierlich bzw. diskontinuierlich betrieben. Es handelt sich hier um typische Feststoffmischer, die aber auch als Mischgranulatoren Einsatz finden. Im kontinuierlichen Betrieb können mit diesen Mischem hohe Massenströme verarbeitet werden. Bei der Verarbeitung hoher Massenströme sind allerdings die von der Mischerwelle ausgehenden Schaufelarme bzw. die Schaufelblätter hohem Verschleißschutz ausgesetzt. Dies führt bei der Verwendung eines gängigen Werkstoffes zur Herstellung der Mischvorrichtung zu unerwünschten Abrasionen. Such mixing devices are already known from the prior art. she are operated continuously or discontinuously. These are typical Solid mixers, which are also used as mixing granulators. In continuous Operation can process high mass flows with these mixers become. When processing high mass flows, however, those are from the mixer shaft outgoing bucket arms or the bucket blades with high wear protection exposed. This leads to the use of a common material to produce the mixing device for undesirable abrasions.

Aufgabe der Erfindung ist es daher, eine gattungsgemäße Mischvorrichtung derart weiterzubilden, daß auch bei der Verarbeitung hoher Massenströme mit abrasivem Material die Standzeit der gesamten Mischvorrichtung erhöht werden kann.The object of the invention is therefore to provide a generic mixing device of this type to further develop that even with the processing of high mass flows with abrasive Material the service life of the entire mixing device can be increased.

Diese Aufgabe wird erfindungsgemäß ausgehend von einer Mischvorrichtung mit den Merkmalen des Oberbegriffs des Anspruchs 1 durch die Kombination mit den Merkmalen des kennzeichnenden Teils des Anspruchs 1 gelöst. Demnach weisen die Schaufelblätter einen Verschleißschutz in Form einer Hartauftragsschweißung aus einem verschleißfesten Material auf.This object is achieved with a mixing device the features of the preamble of claim 1 by the combination with the Features of the characterizing part of claim 1 solved. Accordingly point the airfoils wear protection in the form of hard surfacing made of a wear-resistant material.

Besonders vorteilhafte Ausführungen der Erfindung ergeben sich aus den sich an den Hauptanspruch anschließenden Unteransprüchen.Particularly advantageous embodiments of the invention result from the the main claim subsequent sub-claims.

Demnach besteht der Verschleißschutz der Schaufelblätter vorzugsweise aus einer Hartauftragsschweißung aus Wolframkarbid, insbesondere aus sphärisch geschmolzenem Wolframkarbid. Um die Schaufelblätter entsprechend austauschbar zu gestalten, können an den freien Enden der Schaufelarme Tragplatten fest aufgeschweißt sein, an die die Schaufelblätter aufschraubbar sind.Accordingly, the wear protection of the airfoils preferably consists of a Hard overlay welding from tungsten carbide, in particular from spherically melted Tungsten carbide. Interchangeably interchangeable to design, support plates can be welded onto the free ends of the bucket arms to which the blades can be screwed.

Die Mittelachsen der Schaufelblätter können zu den zugehörigen Schaufelarmen in einem Winkel geneigt sein.The central axes of the airfoils can in relation to the associated airfoil arms be inclined at an angle.

Die Schaufelarme können jeweils mittels einer diese umkleidenden verschleißfesten Hülse umhüllt sein. Gerade durch diese Maßnahme wird der Verschleißschutz der Mischvorrichtung wesentlich erhöht. Grundsätzlich könnte zwar der Schaufelarm auch selbst mit einem Verschleißschutz versehen werden. Dies würde aber dazu führen, daß der Schaufelarm nicht mehr die notwendige Duktilität aufweisen würde, die notwendig ist, um Schlagbeanspruchungen durch grobe Teile, die im zu mischenden Gut vorhanden sein können, auszuhalten. Durch die verschleißfeste Hülse wird die Funktion der verschleißfesten Oberfläche einerseits und der notwendigen Duktilität des Schaufelarms andererseits in idealer Weise miteinander vereint. The blade arms can each be wear-resistant by means of a casing surrounding them Sleeve. It is precisely through this measure that wear protection becomes the mixing device significantly increased. Basically, the bucket arm could can also be provided with wear protection itself. But this would cause the bucket arm to no longer have the necessary ductility would, which is necessary to absorb impact loads from rough parts that are in the mixing goods can be endured. Through the wear-resistant Sleeve becomes the function of the wear-resistant surface on the one hand and the necessary Ductility of the bucket arm, on the other hand, ideally with one another united.

Vorzugsweise kann die Hülse aus einem schweißbaren Stahl, beispielsweise einem ST 37, bestehen, der mit einer Hartauftragsschweißung aus verschleißfestem Material, vorzugsweise aus sphärisch geschmolzenem Wolframkarbid, versehen ist.The sleeve can preferably be made of a weldable steel, for example one ST 37, consist of a hard overlay made of wear-resistant material, preferably made of spherically melted tungsten carbide.

Zur Aufnahme des Schaufelarms an der Mischerwelle können an diese Aufnahmehülsen angeschweißt sein, in die die Schaufelarme jeweils einsteckbar sind und wo diese befestigbar sind.To accommodate the shovel arm on the mixer shaft, these receiving sleeves can be used be welded into which the bucket arms can be inserted and where these are attachable.

Die Hülse kann auf den jeweiligen Schaufelarm über Klemmschrauben festlegbar sein. Um die Schaufelblätter montieren bzw. demontieren zu können, ist die Hülse gemäß einer bevorzugten Ausführungsform kürzer ausgeführt als die frei Länge der Schaufelarme, da diese dadurch durch Lösen der jeweiligen Klemmschrauben verschieblich ist. Zur Demontage der Schaufelblätter kann daher die Hülse zurückgeschoben werden, um den unteren Rand des Schaufelblattes freigeben zu können.The sleeve can be fixed on the respective bucket arm using clamping screws his. In order to be able to assemble or disassemble the blades, the sleeve is According to a preferred embodiment, it is shorter than the free length of the Bucket arms, as they can be moved by loosening the respective clamping screws is. The sleeve can therefore be pushed back to disassemble the blades to release the lower edge of the airfoil.

Vorzugsweise kann zusätzlich eine zweiteilige und austauschbare Wellenschutzhülse als Verschleißschutz der Mischerwelle vorgesehen werden.Preferably, a two-part and replaceable shaft protection sleeve can also be used be provided as wear protection for the mixer shaft.

Auch können die Aufnahmehülsen für die Schaufelarme, d.h. die sogenannten Schaufelarmtaschen, mittels Verschleißschutzblechen gepanzert werden.The receiving sleeves for the bucket arms, i.e. the so-called Bucket arm pockets to be armored using wear protection plates.

Zusätzlich kann gemäß einer vorteilhaften Ausführungsform zur Verhinderung des Verschleißes der Mischerwelle am Einfüllstutzen ein Schutzdach realisiert sein. Hierdurch wird das von oben herabfallende verschleißende Produkt derart abgelenkt, so daß es nicht mehr direkt auf die Mischerwelle fallen kann. Vorteilhaft kann dieses Schutzdach im Einfüllstutzen ebenfalls aus verschleißgeschütztem Material bestehen bzw. mit verschleißgeschütztem Material beschichtet sein.In addition, according to an advantageous embodiment for preventing the Wear of the mixer shaft on the filler neck a protective roof can be realized. As a result, the abrasive product falling from above is deflected in such a way so that it can no longer fall directly onto the mixer shaft. Can be beneficial this canopy in the filler neck is also made of wear-resistant material exist or be coated with wear-resistant material.

Erfindungsgemäß kann die Mischvorrichtung auch als Mischgranulator Verwendung finden. Weitere Einzelheiten und Vorteile der Erfindung werden anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:

Fig. 1-3:
Schnittdarstellungen einer Mischvorrichtung gemäß der vorliegenden Erfindung und
Fig. 4 u. 5:
Details der erfindungsgemäßen Schaufelarme mit Schaufelblättern,
Fig. 6:
eine modifizierte Ausführungsform der Mischerwelle und
Fig. 7:
eine Frontansicht der erfindungsgemäßen Mischvorrichtung.
According to the invention, the mixing device can also be used as a mixing granulator. Further details and advantages of the invention will be explained in more detail with reference to an embodiment shown in the drawing. Show it:
Fig. 1-3:
Sectional views of a mixing device according to the present invention and
Fig. 4 u. 5:
Details of the bucket arms according to the invention with bucket blades,
Fig. 6:
a modified embodiment of the mixer shaft and
Fig. 7:
a front view of the mixing device according to the invention.

In Fig. 1 ist eine Mischvorrichtung 22 gezeigt, von einer Mischtrommel gebildet ist. Im Inneren der Mischtrommel 22 erstreckt sich zentral eine an den Enden der Mischtrommel 22 gelagerte Mischerwelle 23, die mittels eines eigenen Motors M antreibbar ist.1 shows a mixing device 22, which is formed by a mixing drum. Inside the mixing drum 22 extends centrally at the ends of the Mixing drum 22 mounted mixer shaft 23, which by means of its own motor M is drivable.

An der Mischerwelle 23 sind Schaufelarme 24, die sich radial nach außen erstrecken, befestigt. Diese Schaufelarme 24 tragen Mischschaufeln 25. Die Mischschaufeln 25 weisen ebenfalls Schaufelblätter auf, deren Mittelachsen 26 gegenüber den zugehörigen Schaufelarmen 24 (d.h. deren Längserstreckung) mit einem Winkel β nach vorne, d.h. in Bewegungsrichtung, und nach oben geneigt sind. In jeweils radialer Projektion der Mittelachse 26 der Schaufelblätter zur Mittelachse 27 der Mischerwelle 23 ergibt sich ein Neigungswinkel α zwischen der Projektion der Mittelachse 26 der Schaufelblätter und der Mittelachse 27 der Mischerwelle 23.On the mixer shaft 23 there are paddle arms 24 which extend radially outwards attached. These blade arms 24 carry mixing blades 25. The mixing blades 25 also have airfoils, the central axes 26 opposite the associated blade arms 24 (i.e. their longitudinal extent) with an angle β forward, i.e. in the direction of movement, and are inclined upwards. In each radial Projection of the central axis 26 of the airfoils to the central axis 27 of the mixer shaft 23 there is an angle of inclination α between the projection of the central axis 26 of the airfoils and the central axis 27 of the mixer shaft 23.

In der hier dargestellten kontinuierlich betriebenen Mischtrommel 22 wird das zu mischende Gut über die Öffnung 1 im Einfüllstutzen 29 eingebracht und über die Öffnung 2 wieder ausgebracht. Das Einsatzmaterial wird hier ruhig geführt und es erfolgt ein Schubmischen im Haufwerk. Mit 30 ist ein Stutzen bezeichnet, über den für den Fall, daß die Mischvorrichtung als Mischgranulator eingesetzt werden soll, eine entsprechende Flüssigkeit eingebracht werden kann. In den Fig. 4 und 5 ist die Mischerwelle 23 im Schnitt gezeigt. An dieser ist eine Aufnahmehülse 32 angeschweißt. Der Schaufelarm 24 ist in die Hülse 32 eingesteckt und dort mittels Schrauben 34 festgelegt. Der Schaufelarm 24 weist an seinem freien Ende einen im Querschnitt dreieckigen Einschnitt auf, in welchen eine Tragplatte 36 eingeschweißt ist. Auf die Tragplatte 36 ist ein Schaufelblatt 38 in dem vorbestimmten Winkel, wie er zuvor beschrieben worden ist, aufgeschraubt.In the continuously operated mixing drum 22 shown here, this becomes too Mixing material introduced through the opening 1 in the filler neck 29 and through the Opened opening 2 again. The feed material is kept calm here and it there is a shear mixing in the pile. At 30, a nozzle is referred to in the event that the mixing device is to be used as a mixing granulator, an appropriate liquid can be introduced. 4 and 5 is the Mixer shaft 23 shown in section. A receiving sleeve 32 is welded to this. The blade arm 24 is inserted into the sleeve 32 and there by means of Screws 34 set. The blade arm 24 has one at its free end in cross section triangular incision in which a support plate 36 is welded is. On the support plate 36 is an airfoil 38 in the predetermined Angle, as described above, screwed on.

Der Schaufelarm 24 besteht aus einem duktilen Stahl, beispielsweise einem ST 52. Hierdurch hat der Schaufelarm eine hinreichend hohe Duktilität, um Schläge durch im Mischgut vorhandene grobe Teile auszuhalten.The blade arm 24 consists of a ductile steel, for example an ST 52. As a result, the bucket arm has a sufficiently high ductility to withstand blows Endure coarse parts in the mix.

Zur Verbesserung des Verschleißschutzes weist das Schaufelblatt 38 eine Hartauftragsschweißung aus sphärisch geschmolzenem Wolframkarbid auf Falls die Schaufelblätter 38 abgenutzt sind, können sie einfach durch Verschrauben mit der Tragplatte 36 ausgewechselt werden. Auf dem Schaufelarm 24 ist verschieblich eine verschleißfeste Hülse 40 gelagert. Diese kann über Klemmschrauben 42, 44 festgelegt werden. Die verschleißfeste Hülse besteht aus einem duktilen Stahl, der eine Hartauftragsschweißung aus Wolframkarbid aufweist.To improve wear protection, the airfoil 38 has a hard overlay weld made of spherically melted tungsten carbide on Falls die Blade 38 are worn, they can be easily screwed to the Support plate 36 are replaced. On the blade arm 24 is slidable a wear-resistant sleeve 40 is mounted. This can be done using clamping screws 42, 44 be determined. The wear-resistant sleeve is made of a ductile steel that has a hard surfacing of tungsten carbide.

Wie den Fig. 4 und 5 zu entnehmen ist, ist die Hülse 40 etwas kürzer bemessen als die Länge des Schaufelarms 24. Hierdurch kann die Hülse 40 von ihrer normalen Betriebsstellung, wie sie in Fig. 5 dargestellt ist, in eine Auswechselstellung, wie sie in Fig. 4 dargestellt ist, verschoben werden. In der Auswechselstellung gemäß Fig. 4 gibt die Hülse 40 die Unterkante des Schaufelblattes 38 frei, so daß das Schaufelblatt 38 von der Tragplatte 36 abnehmbar ist.As can be seen in FIGS. 4 and 5, the sleeve 40 is dimensioned somewhat shorter than the length of the bucket arm 24. This allows the sleeve 40 from its normal Operating position, as shown in Fig. 5, in an exchange position, as it 4 is shifted. In the replacement position according to Fig. 4, the sleeve 40 releases the lower edge of the airfoil 38 so that the airfoil 38 is removable from the support plate 36.

In der Fig. 6 ist auch die Mischerwelle 23 mit einem Verschleißschutz umgeben. Der Verschleißschutz ist hier durch auswechselbare Wellenschutzhülsen 54 aus Spezialstahl gebildet. Diese Wellenschutzhülsen dienen zum Schutz der Mischerwelle 23 gegen abrasiven Verschleiß. 6, the mixer shaft 23 is also surrounded with wear protection. The wear protection is characterized here by exchangeable shaft protection sleeves 54 Special steel formed. These shaft protection sleeves serve to protect the mixer shaft 23 against abrasive wear.

Auch die Schaufelarmtaschen 58, in welche die in der Fig. 6 nicht näher dargestellten Schaufelarme 24 einsetzbar sind, sind in der hier dargestellten Ausführungsform mit Verschleißschutzblechen 50 und 52 versehen.Also the shovel arm pockets 58, into which those not shown in FIG. 6 are shown Bucket arms 24 can be used are in the embodiment shown here provided with wear protection plates 50 and 52.

Die Wellenschutzhülsen 54 sind um die Welle 23 gelegt, wobei Ausschnitte 56 eine Durchführung der Schaufelarmtaschen 58 zulassen. Eine Verschraubung erfolgt mit aufgepanzerten Schrauben 60. Gegen Verdrehen gesichert sind die Schutzhülsen 54 durch die Schaufeltaschen 58. Der zusammen mit den hier nicht näher dargestellten Schaufeln verschraubte Verschleißschutz 50 und 52 der Schaufeltasche 58 besitzt Langlöcher, so daß diese gegen die Wellenschutzhülse 54 einstellbar sind und Relativbewegungen zur Mischerwelle 23 verhindern.The shaft protection sleeves 54 are placed around the shaft 23, with cutouts 56 one Allow bucket arm pockets 58 to pass through. A screw connection is made with armored screws 60. The protective sleeves are secured against twisting 54 through the shovel pockets 58. The together with those not shown here Buckets of screwed wear protection 50 and 52 of the bucket pocket 58 has elongated holes so that they are adjustable against the shaft protection sleeve 54 and prevent relative movements to the mixer shaft 23.

Im Bereich des Materialabwurfs wird die Schaufelarmtasche 58 auch im hinteren Bereich beansprucht. Deshalb ist hier entsprechend zusätzlich zu dem Verschleißschutz 50 im vorderen Bereich jeweils auch ein Verschleißblech 52 im hinteren Bereich ausgeführt.In the area of material discharge, the bucket arm pocket 58 is also in the rear Area occupied. Therefore here is corresponding to the wear protection 50 in the front area also a wear plate 52 in the rear area executed.

In Fig. 7 ist eine Frontansicht der erfindungsgemäßen Mischvorrichtung gezeigt. Aus dieser Darstellung ist ersichtlich, daß in dem Einfüllstutzen 29 ein spitz zulaufendes Schutzdach 80 ausgeführt ist, das in der Mine des Einfüllstutzens derart angeordnet ist, daß es die Mischerwelle 23, die in der Mischtrommel 22 angeordnet ist, abschottet. Somit kann das durch den Einfüllstutzen 29 eingefüllte schleißende Produkt derart abgelenkt werden, daß es nicht mehr unmittelbar auf die Mischerwelle 23 fällt. Das Schutzdach 80 kann ebenfalls aus verschleißgeschützem Material bestehen.7 shows a front view of the mixing device according to the invention. From this illustration it can be seen that in the filler neck 29 a tapered Canopy 80 is executed in the mine of the filler neck is arranged that it is the mixer shaft 23, which is arranged in the mixing drum 22 is foreclosed. Thus, the wearing end filled through the filler neck 29 Product be distracted so that it is no longer directly on the mixer shaft 23 falls. The canopy 80 can also be made of wear-resistant material consist.

Claims (14)

Mischvorrichtung mit einer Mischtrommel und einer an den Enden der Mischtrommel gelagerten Mischerwelle, wobei die Mischerwelle sich radial nach außen erstreckende Schaufelarme aufweist, an deren Enden bis nahe zur Mischtrommelwand reichende Schaufelblätter angeordnet sind,
dadurch gekennzeichnet,
daß die Schaufelblätter einen Verschleißschutz in Form einer Hartauftragsschweißung aus einem verschleißfesten Material aufweisen.
Mixing device with a mixing drum and a mixer shaft mounted on the ends of the mixing drum, the mixer shaft having blade arms which extend radially outward and at the ends of which are arranged blade blades which extend close to the wall of the mixing drum,
characterized by
that the blades have wear protection in the form of hard overlay welding made of a wear-resistant material.
Mischvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Hartauftragsschweißung aus Wolframkarbid, insbesondere sphärisch geschmolzenem Wolframkarbid, besteht. Mixing device according to claim 1, characterized in that the Hard overlay welding from tungsten carbide, especially spherically melted Tungsten carbide. Mischvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mit den freien Enden der Schaufelarme Tragplatten fest verbunden sind, auf die die Schaufelblätter aufschraubbar sind.Mixing device according to claim 1 or 2, characterized in that with the free ends of the bucket arms are firmly connected to the the blades can be screwed on. Mischvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Mittelachsen der Schaufelblätter zu den zugehörigen Schaufelarmen mit einem Winkel geneigt sind.Mixing device according to one of claims 1 to 3, characterized in that that the central axes of the airfoils to the associated airfoil arms are inclined at an angle. Mischvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Schaufelarme jeweils mittels einer diese umkleidenden und auswechselbaren verschleißfesten Hülse umhüllt sind.Mixing device according to one of claims 1 to 4, characterized in that that the bucket arms each by means of a lining and replaceable wear-resistant sleeve are encased. Mischvorrichtung nach einem der Anspruch 5, dadurch gekennzeichnet, daß die Hülse aus einem schweißbaren Stahl besteht, der mit einer Panzeraufschweißung aus verschleißfestem Material, vorzugsweise aus Wolframkarbid versehen ist.Mixing device according to one of claim 5, characterized in that the sleeve is made of a weldable steel with a welded armor made of wear-resistant material, preferably tungsten carbide is provided. Mischvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß an der Mischerwelle Aufnahmehülsen angeschweißt sind, in die die Schaufelarme jeweils einsteckbar und festlegbar sind.Mixing device according to one of claims 1 to 6, characterized in that that receiving sleeves are welded to the mixer shaft, in which the Bucket arms can each be inserted and fixed. Mischvorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Hülse auf den jeweiligen Schaufelarm über Klemmschrauben festlegbar ist.Mixing device according to one of claims 1 to 7, characterized in that that the sleeve on the respective bucket arm via clamping screws is definable. Mischvorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Hülse kürzer ausgeführt ist als die freie Länge der Schaufelarme, so daß sie zur Montage bzw. Demontage der Schaufelblätter verschiebbar ist. Mixing device according to one of claims 1 to 8, characterized in that the sleeve is shorter than the free length of the bucket arms, so that it can be moved to assemble or disassemble the blades. Mischvorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Mischerwelle mittels mindestens einer Wellenschutzhülle aus Spezialstahl umhüllt ist.Mixing device according to one of claims 1 to 9, characterized in that that the mixer shaft by means of at least one protective shaft cover Special steel is coated. Mischvorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Aufnahmehülsen für die Schaufelarme mittels Verschleißschutzblechen geschützt sind.Mixing device according to one of claims 1 to 10, characterized in that that the receiving sleeves for the bucket arms by means of wear protection plates are protected. Mischvorrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß im Bereich eines Einfüllstutzens, der an der Mischtrommel angeordnet ist, ein Schutzdach derart eingesetzt ist, daß die Mischerwelle gegenüber dem durch den Einfüllstutzen eingefüllten Produkt abgeschottet ist.Mixing device according to one of claims 1 to 11, characterized in that that in the area of a filler neck, which is arranged on the mixing drum is, a canopy is inserted so that the mixer shaft opposite the product filled in through the filler neck is sealed off. Mischvorrichtung nach Anspruch 12, dadurch gekennzeichnet, daß das Schutzdach aus verschleißfestem Material besteht oder einen Verschleißschutz in Form einer Hartauftragsschweißung aus einem verschleißfestem Material aufweist.Mixing device according to claim 12, characterized in that the Canopy is made of wear-resistant material or wear protection in the form of hard overlay welding from a wear-resistant Has material. Verwendung einer Mischvorrichtung nach einem der Ansprüche 1 bis 11 als Mischgranulator.Use of a mixing device according to one of claims 1 to 11 as Mixing granulator.
EP99114782A 1998-07-31 1999-07-28 Mixing device Withdrawn EP0976442A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE29813742 1998-07-31
DE29813742U 1998-07-31
DE29820936U 1998-11-23
DE29820936U DE29820936U1 (en) 1998-07-31 1998-11-23 Mixing device

Publications (2)

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EP0976442A2 true EP0976442A2 (en) 2000-02-02
EP0976442A3 EP0976442A3 (en) 2002-06-05

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Cited By (12)

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EP1149631A1 (en) * 2000-04-28 2001-10-31 Heissenberger & Pretzler Ges.m.b.H. Tool mounting for a rotary cutter
EP1365853A1 (en) * 2000-07-28 2003-12-03 David Little Thermokinetic mixer, compositions and structural products
CN100515645C (en) * 2007-04-20 2009-07-22 青铜峡铝业集团有限公司 Welding process of motor driven rimer for kneading machine
MD163Z5 (en) * 2009-12-24 2010-10-31 Институт Сельскохозяйственной Техники "Mecagro" Biomass flow conditioning mixer
WO2014000733A1 (en) * 2012-06-26 2014-01-03 Krauskopf Gerhard Mixing tool holder comprising interchangeable mixing blades
CN103817068A (en) * 2014-03-02 2014-05-28 苏州信文食品有限公司 Powder food mixing rolling screening machine
CH708182A1 (en) * 2013-06-10 2014-12-15 Axpo Kompogas Engineering Ag Agitator shaft of a fermenter and fixing method of stirring arms.
WO2019086116A1 (en) * 2017-11-02 2019-05-09 Ammann Schweiz Ag Construction material mixer
US10456758B2 (en) 2016-04-08 2019-10-29 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Mixing shaft
EP3608014A1 (en) 2018-08-07 2020-02-12 Pioonier GmbH Thermokinetic mixer for melt mixing of plastic waste products
WO2020048929A1 (en) * 2018-09-03 2020-03-12 Detloff GmbH Mixer with arm
WO2021155875A1 (en) 2020-02-04 2021-08-12 Reimund Dann Thermokinetic mixer for melt-mixing waste plastic products

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1149631A1 (en) * 2000-04-28 2001-10-31 Heissenberger & Pretzler Ges.m.b.H. Tool mounting for a rotary cutter
EP1365853A1 (en) * 2000-07-28 2003-12-03 David Little Thermokinetic mixer, compositions and structural products
EP1365853A4 (en) * 2000-07-28 2004-11-10 David Little Thermokinetic mixer, compositions and structural products
CN100515645C (en) * 2007-04-20 2009-07-22 青铜峡铝业集团有限公司 Welding process of motor driven rimer for kneading machine
MD163Z5 (en) * 2009-12-24 2010-10-31 Институт Сельскохозяйственной Техники "Mecagro" Biomass flow conditioning mixer
EP2864027B1 (en) 2012-06-26 2016-08-03 Krauskopf, Gerhard Mixing tool holder comprising interchangeable mixing blades
WO2014000733A1 (en) * 2012-06-26 2014-01-03 Krauskopf Gerhard Mixing tool holder comprising interchangeable mixing blades
CH708182A1 (en) * 2013-06-10 2014-12-15 Axpo Kompogas Engineering Ag Agitator shaft of a fermenter and fixing method of stirring arms.
WO2014198666A1 (en) * 2013-06-10 2014-12-18 Axpo Kompogas Engineering Ag Agitator shaft of a fermenter and method for fastening agitating arms
CN103817068A (en) * 2014-03-02 2014-05-28 苏州信文食品有限公司 Powder food mixing rolling screening machine
US10456758B2 (en) 2016-04-08 2019-10-29 Maschinenfabrik Gustav Eirich Gmbh & Co. Kg Mixing shaft
WO2019086116A1 (en) * 2017-11-02 2019-05-09 Ammann Schweiz Ag Construction material mixer
EP3608014A1 (en) 2018-08-07 2020-02-12 Pioonier GmbH Thermokinetic mixer for melt mixing of plastic waste products
WO2020048929A1 (en) * 2018-09-03 2020-03-12 Detloff GmbH Mixer with arm
WO2021155875A1 (en) 2020-02-04 2021-08-12 Reimund Dann Thermokinetic mixer for melt-mixing waste plastic products

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