DE431715C

DE431715C - Vortex mill, from which the material to be ground is discharged by a blow stream through an opening in the mill housing

Info

Publication number: DE431715C
Application number: DEH99198D
Authority: DE
Original assignee: HARTSTOFF METALL AKT GES HAMET
Current assignee: HARTSTOFF METALL AKT GES HAMET
Publication date: 1926-07-19

Description

Die Erfindung bezieht sich auf eine Ein- j richtung an Wirbelmühlen (Patent 400307), j bei denen das Mahlgut durch eine im Mittel- j teil des Mühlengehäuses befindliche öffnung vermittels eines Blasstromes ausgetragen wird, die dazu dient, noch nicht hinreichend zerkleinerte, aber bereits aus dem Gehäuse ausgetretene Mahlgutteilchen zurückzuhalten und kurzer Hand wieder dem Mahlprozeß zuzuführen. The invention relates to a device on vortex mills (patent 400307), j in which the ground material through an opening located in the middle part of the mill housing is discharged by means of a blow stream, which serves to do so, is not yet sufficient to hold back crushed, but already out of the housing grist particles and without further ado to feed it back into the grinding process.

Die Aufgabe der neuen Einrichtung besteht darin, solche Teile abzufangen und gleich- j zeitig Verstopfungen an der Fangvorrichtung j zu vermeiden, die besonders deshalb leicht auftreten, weil durch den Blasstrom in der Hauptsache das feine Mahlgut ausgetragen wird.The task of the new facility is to intercept such parts and to j to avoid early blockages on the safety gear j, which is therefore particularly easy occur because mainly the fine grist is discharged by the blow stream will.

Es geschieht dies gemäß der Erfindung dadurch, daß in den Weg des Blasstromes Prallao flächen gebracht werden, welche den Strom aus der ursprünglichen Richtung abfangen, jedoch ein Zurückfallen der zu groben Teile ermöglichen. Außerdem werden noch entsprechend bemessene Siebe oder gelochte Bleche zur Anwendung gebracht, die den Durchgang zu grober Teile verhindern. Das System der Siebe und Prallflächen wird dabei zweckmäßig so befestigt, daß es Bewegungen , ausführt, die etwaige Verstopfungen verhindert. Die Einrichtung wird dabei so getroffen, daß aus der Mühle austretende zu grobe Teile selbst den Anstoß zu den genann- ; ten Bewegungen geben; auch können diese in j wirksamer Weise dadurch gefördert werden, daß man in entsprechenden Zeitabständen das frisch zugegebene Mahlgut dagegen fallen läßt und die Fangvorrichtung auf diese Weise erschüttert.It does this according to the invention in that Prallao in the path of the blow stream surfaces that intercept the current from the original direction, however allow the excessively coarse parts to fall back. Also, will still be appropriate sized sieves or perforated sheets are used to prevent the passage of too large parts. That The system of sieves and baffles is expediently attached in such a way that there are movements, that prevents any blockages. The facility is designed in such a way that that too coarse parts emerging from the mill are themselves the impetus for the named-; give th movements; these can also be effectively promoted by that you drop the freshly added grist at appropriate time intervals leaves and shakes the safety gear in this way.

Die Abbildung zeigt ein Ausführungsbeispiel der Erfindung. Das Mühlengehäuse 1, in welchem in bekannter Weise die gegenläufigen Propeller 24 angeordnet sind, besitzt im mittleren Teil nach oben gerichtet eine Auslaßöffnung 3. Über diese gestülpt ist ein zylinderischer Behälter 2, der am oberen Ende den Auslaßstutzen 20 trägt, durch welchen das Mahlgut in die Sichtvorrichtungen oder Auffangbehälter gelangt.The figure shows an embodiment of the invention. The mill housing 1, in which the counter-rotating propellers 24 are arranged in a known manner an outlet opening 3 is directed upwards in the middle part cylindrical container 2, which carries the outlet nozzle 20 at the upper end, through which the grist ends up in the separators or collecting containers.

Der Zylinder 2 bildet gegenüber der öffnung 3 eine erweiterte Kammer 25, die in ihrem oberen Teil durch einen vorspringenden Rand 4 wiederum verengt wird, so daß nur die Durchtrittsöffnung 5 verbleibt. Der Zylinder erweitert sich 'wiederum zu der Kammer 26 und wird nochmals durch den, vorspringenden Ring 27 verengt, um sich abermals zu dem Raum 28 zu erweitern, an dem der Stutzen 20 angeschlossen ist. Ein Deckel 19 schließt den Zylinder 2 nach oben hin ab. Der Deckel 19 trägt in seinem oberen Teil einen mit Hilfe der Schraubenmutter 18 gesicherten, in der hohen Lage verstellbaren Haken 17. An diesem ist der kegelförmige Körper 8 eingehängt. Der Kegel 8 ist durch eine Stange 15 mit einem Zylinder 9 verschraubt, der seinerseits die Stange 14 trägt, an welcher ein ebenfalls kegelförmiges Dach 6 befestigt ist. Das Dach 6 hängt in den erweiterten Raum 25 hinein, so daß allseits ein möglichst gleicher Abstand -von der Wandung gegeben ist. An dem Zylinder 9 sind außerdem die schräg nach unten gerichteten Arme befestigt, die einen Ring 12 tragen. Dieser reicht bis dicht an den nach abwärts abgeschrägten vorspringenden Rand 27 heran. Die Arme 9 tragen ferner nach oben vorspringende Lappen 13; an diesen und an dem unteren Rand des Kegels 8 ist ein Sieb 10 von kreisförmigem Querschnitt befestigt. Ein zweites Sieb 11 umgibt das letztere mit einigem Abstand und wird einerseits von einem vorspringenden Rande des Kegels 8, andererseits von der Außenkante des Ringes 12 getragen. Das aus der Mühle austretende Gut stößt zunächst durch die Öffnung 3 gegen das Dach 6 und wird dann aus seinem Wege abgelenkt, indem es genötigt wird, um die Außenkante des Daches 6 herumzuströmen. Es tritt darauf durch die Öffnung 25 in den Raum 26 und von da in den Raum 28. Zunächst steigt es dabei an dem inneren Siebe 10 in die Höhe, tritt erst durch dieses und dann durch das Sieb 11 hindurch in den Ringraum, welcher zwischen dem letzteren und der Wandung des Zylinders 2 besteht, um dann durch den Stutzen 20 zu entweichen. DasThe cylinder 2 forms an enlarged chamber 25 opposite the opening 3, which in FIG its upper part is again narrowed by a projecting edge 4, so that only the passage opening 5 remains. The cylinder expands again to that Chamber 26 and is again narrowed by the projecting ring 27 to itself again to expand to the space 28 to which the nozzle 20 is connected. A Cover 19 closes the cylinder 2 at the top. The cover 19 carries in its upper Part of a secured with the help of the nut 18, adjustable in the high position Hook 17. The conical body 8 is suspended from this. The cone 8 is through a rod 15 is screwed to a cylinder 9 which in turn carries the rod 14, on which a likewise conical roof 6 is attached. The roof 6 hangs in the extended Space 25 into it, so that the same distance as possible from the wall on all sides given is. On the cylinder 9 are also the obliquely downward arms attached, which wear a ring 12. This extends right up to the downward sloping one protruding edge 27 approach. The arms 9 also carry upwardly projecting tabs 13; on this and on that A sieve 10 of circular cross-section is attached to the lower edge of the cone 8. A second sieve 11 surrounds the latter at some distance and is on the one hand by a projecting edge of the cone 8, on the other hand from the outer edge of the ring 12 worn. The material emerging from the mill first pushes against through the opening 3 the roof 6 and is then deflected out of its way by being forced to the Outer edge of the roof 6 to flow around. It then occurs through the opening 25 in the Room 26 and from there to room 28. First, it rises on the inner sieve 10 upwards, first passes through this and then through the sieve 11 into the annular space, which exists between the latter and the wall of the cylinder 2 in order to then escape through the connecting piece 20. That

*} Von dem Patentsucher sind als die Erfinder angegeben worden:*} The patent seeker stated that the inventors were:

Dr.-Ing. Erwin Kramer in Berlin und Dr. Emil Pods\ns in Friedriclishagen.Dr.-Ing. Erwin Kramer in Berlin and Dr. Emil Pods \ ns in Friedriclishagen.

Claims

Sieve 11 is chosen so that only the desired grain size can pass through it. The sieve ίο has considerably larger openings and is mainly used to protect the finer sieve ii by protecting the same from the ingress of too coarse components. The very coarsest constituents are already caught by the roof 6, the next ίο finer components rise even higher and are caught by the sieve io, while the even finer constituents are retained by the sieve Ii. Only those parts which have received the desired fineness emerge through the connecting piece 20. The parts held back by the roof 6 easily fall back into the mill; those parts which are blocked by the sieve 10 also have an almost straight path downwards in order to get back into the mill. Those parts, finally, which have passed through the sieve 10, but are held in the sieve 11, fall down into the annular space between 10 and n and slide on the inner edge of the ring 12 also back into the downward central opening. The annular projection 27 serves to prevent the ground material from easily entering the annular space between the sieve 11 and the wall of the cylinder housing 2. The ring 12 leaves only a fine gap open to the upper edge of the projection 27; this serves to allow particles falling out of the blowing stream back down into the annular space between the sieve 11 and the housing wall. The counter-impact of coarse particles against the roof 6 continuously causes small impacts which cause the entire screen body to vibrate and prevent clogging of the screens 10 and 11 as a result of the resulting vibration. If the edge of the ring 12 hits the projection 27, the vibrations become even more effective, and the already fairly fine material stuck in the gap between 12 and 27 is hit and slides downwards. In order to make the vibrations of the sieve system even more effective, the connector 21, which leads to the storage container 23, is connected to the chamber 26, directed obliquely upward. Between the two there is a conveyor wheel 22, the drive of which is not shown here. The same is fresh ground material in the interstices in the connection piece 2i, where it falls down and hits the roof 6. The resulting low shock causes further vibration of the sieves 10 and 11, and the roof 6 is moved back and forth, so that blockages in the chamber 25 are also avoided. This is all the more important when coarse or bulky ground material is freshly added. The protruding edge 4 serves, on the one hand, to allow the ground material emerging from the nozzle 21 to fall as effectively as possible onto the roof 6, on the other hand it protects the nozzle 21 from the penetration of parts thrown out of the mill. The facility can of course be changed in many ways; For example, the type of transport device 22 is irrelevant, you can use only one instead of two sieves 10 and the like with PaTKN T-Aν Proverbs:

1. Vortex mill, from which the ground material is blown through an im Mill housing located opening is discharged, characterized in that that behind the outlet opening in a connecting to the discharge line Housing arranged a viewing device consisting of a baffle and a filter arranged above it by which too large parts are separated from the material flow to fall back into the mill.

2. Embodiment according to claim 1, characterized in that the from a single or multiple hose strainer existing filter and the impact body connected to it movable are suspended so that they can be easily shaken.

3. Embodiment according to claim 1 and 2, characterized in that the lower screen frame and the housing wall opposite it is provided with inclined surfaces that between a narrow gap remains for both of them.

4. Embodiment according to claim 1 to 3, characterized in that the Fresh goods storage container with the housing containing the viewing device through a sloping downwardly leading, laterally attached nozzle is connected, which opens above the impact body but below the screen body, so that the fresh material is supplied above the impact body and shakes the same by hitting it.

1 sheet of drawings.