EP0246454A2 - Device for producing a solid material aerosol - Google Patents

Device for producing a solid material aerosol Download PDF

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Publication number
EP0246454A2
EP0246454A2 EP87105705A EP87105705A EP0246454A2 EP 0246454 A2 EP0246454 A2 EP 0246454A2 EP 87105705 A EP87105705 A EP 87105705A EP 87105705 A EP87105705 A EP 87105705A EP 0246454 A2 EP0246454 A2 EP 0246454A2
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EP
European Patent Office
Prior art keywords
brush
solid
outlet channel
outlet
aerosol
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.)
Granted
Application number
EP87105705A
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German (de)
French (fr)
Other versions
EP0246454A3 (en
EP0246454B1 (en
Inventor
Leander Dipl.-Ing. Mölter
Wolfgang Dipl.-Phys. Mölter
Friedrich Munzinger
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Palas GmbH Partikel und Lasermesstechnik
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Palas GmbH Partikel und Lasermesstechnik
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Publication date
Application filed by Palas GmbH Partikel und Lasermesstechnik filed Critical Palas GmbH Partikel und Lasermesstechnik
Priority to AT87105705T priority Critical patent/ATE57316T1/en
Publication of EP0246454A2 publication Critical patent/EP0246454A2/en
Publication of EP0246454A3 publication Critical patent/EP0246454A3/en
Application granted granted Critical
Publication of EP0246454B1 publication Critical patent/EP0246454B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/144—Arrangements for supplying particulate material the means for supplying particulate material comprising moving mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/082—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to a condition of the discharged jet or spray, e.g. to jet shape, spray pattern or droplet size

Definitions

  • the invention relates to a device for generating a solid aerosol from a pile, with a solid container, a feed piston, a rotating brush, an air inlet and an outlet channel.
  • Such a device is known from DE-OS 25 33 554.
  • Filled, fine-grained and compressed solid in the cylindrical solid container is fed to a rotating element in the form of a brush with the aid of a piston.
  • the brush separates the solid in layers.
  • the required airflow is initially close to the rotary via air intakes axis of the brush and then to the circumference of the brush in the area in which the solid is detached from the pile by the brush.
  • an aerosol outlet nozzle through which air and solid matter is led outside.
  • an aerosol outlet nozzle through which air and solid matter is led outside.
  • the known device has a number of disadvantages, so the cross section of the outlet port is fixed and expands at least in parts of its length, which can lead to build-up in the outlet channel by adhering already dosed and entrained by the air, which eventually through periodic growth and detachment of solid particles leads to fluctuations in throughput.
  • the known device is not pressure-resistant; If there is a back pressure in the outlet area, this leads to air and solid particles partially striking back over the axle bearings of the brush, leading to deposits or escaping there, so that the results of the measurements are also falsified as a whole.
  • the known device is difficult to clean, particularly in the outlet area, in which, as mentioned, deposits can occur.
  • the invention is therefore based on the object, while avoiding the aforementioned disadvantages, to develop a device of the type mentioned in such a way that a reliable, constant throughput is achieved without fluctuations in density in the aerosol.
  • the stated object is achieved in a device of the generic type in that a control device connected to the drive feed piston is provided with a light detector device arranged in the outlet path of the solid aerosol.
  • the device according to the invention achieves excellent consistency in density.
  • the light detector arrangement comprises a light transmitter and has a light receiver which can be pivoted relative to one another about the axis of the solid aerosol jet.
  • the swiveling mobility of the light transmitter and light receiver can be achieved in that the light transmitter and light receiver are each arranged in articulated pipe parts, it being provided in particular that the pipe parts are connected to one another via ring-shaped guides that leave a passage for the solid aerosol are articulated.
  • an injector device is arranged in the aerosol jet, the injector device preferably being arranged behind the photo receiver device, so that the latter still works with a relatively dense aerosol flow, in that the absolute density fluctuations are greater than in the finally diluted aerosol flow.
  • the outlet channel has a non-increasing cross-section over its length with increasing depth. due to the cross-section increasing at least over partial areas in the known device, this leads to flow reductions and thus the deposits mentioned, while the inventive design reliably reduces the flow in the outlet channel is avoided, it being possible, according to a first preferred embodiment, for the cross section of the outlet channel to decrease over its length. In this case, the flow velocity increases.
  • a further extremely preferred embodiment provides that the cross section of the outlet channel remains constant over its entire length. It is essential that the cross-sectional shape does not remain the same over the entire length of the outlet channel, but rather changes from a relatively flat area where the solid is taken up to an outlet opening of the channel, in which the width and depth essentially match. It has emerged that the width and depth of the outlet duct cannot generally change linearly over the length, since then the cross-sectional area generally does not remain constant over the length, but rather has a maximum in a central region, that is to say over enlarged a partial area, which would lead to the speed reductions to be avoided and thus deposits.
  • the object according to the invention for avoiding solid deposits is in particular further supported in that the boundary walls of the outlet channel run without edges and that transitions between the depth and width of the boundary walls delimiting the outlet channel are at least rounded.
  • the cross section in the outlet area is such that the lower half of the outlet opening forms a semicircle, the radius of which is half the height of the outlet opening.
  • the outlet channel is arranged at a distance from the opening of the solid container to the brush chamber, the outlet channel being diametrically opposite the opening of the solid container to the brush chamber.
  • the outlet channel is in a separate from a housing of the brush, removable part is formed. In this way, on the one hand, the outlet ducts can be easily removed and then easily cleaned by replacing the removable part, which is designed in the form of a cover.
  • outlet channels adapted to the respective problem for example outlet channels adapted to different inner diameters of solid containers, can be used in a convenient manner and overall larger work areas with regard to throughput, mass concentration and volume flow can be covered.
  • the motor and drive of the brush are encapsulated airtight.
  • This configuration ensures that the device according to the invention is pressure-resistant and that aerosols can also be blown out against back pressure.
  • the bristles of the brush can be made of wire or suitable plastics.
  • the device 1 according to the invention shown in principle in FIG. 1, for producing a solid aerosol from a pile has a solid container 2 in which there are stuffed solid particles 3.
  • the solids container is cylindrical.
  • a feed piston 4 is arranged so as to be axially movable, by means of which the solid material 3 can be slowly moved upwards.
  • a peripheral brush 6, which has bristles 7 made of metal or plastic on its circumference.
  • an air inlet 11 and an outlet duct 12 for the air flow and the solids entrained by it are formed (FIG. 3).
  • the piston 4 in the solids container 2 is moved by a feed spindle 18 in a spindle guide 19, optionally via an intermediate element 20.
  • the solids container 2 has a collar 14, on which it is held securely by a locking plate 16 inserted into the housing 15, which has a handle 17, even when pressure builds up inside the device. This is important for the dosing constancy, since it could otherwise happen that the container lowers little without the loading the operator notices this, but this would suddenly pull off more solid particles and cause a metering boost, the reason for which is not readily apparent. This disadvantage is surely avoided by the locking plate.
  • the housing 15 of the actual particle generator 1 is immediately followed by a photo receiver arrangement 41, which has a regulator for regulating the voltage of the drive of the feed piston 4. Furthermore, in the exemplary embodiment shown, an injector device 42 is arranged downstream of the photo receiver arrangement 41, in which the aerosol jet generated by the particle generator 1 can be further diluted in a predetermined manner.
  • the photoreceiver arrangement 41 has two tube parts 43, 44 which are connected to one another in an articulated manner by means of guides 46 designed in the form of rings.
  • the ring-like guides 46 surround a passage 47 for the aerosol jet, the axis of the direction of movement being designated 48.
  • a light transmitter 49 and a photo receiver 51 are arranged in each of the two tube parts 43, 44.
  • the relative pivoting position shown in FIG. 6 with a relative angle of 90 degrees between the two tube parts 43, 44 is not inevitable; the tube parts 43, 44 can be pivoted relative to one another about the axis 48 in such a way that the stray light from the light transmitter falling on the photo receiver 51 49 is maximum, so that the photo receiver device has optimal sensitivity.
  • the light emitted by the light transmitter 49 is scattered on the particles of the solid aerosol jet passing through the passage 47, the maximum intensity of the scattered light depending on the particle size and the particle type.
  • the tubes 43 44 are pivoted relative to one another in such a way that the scatter signal picked up by the photo receiver 51 is at a maximum.
  • the light signal picked up by the photo receiver 51 fluctuates depending speed of the intensity or density of the aerosol passing through the device 41, namely essentially linear, the density of the aerosol itself depending on the bulk or material density of the aggregate 3 in the container 2 of the particle generator 1.
  • a different bulk or material density of the aggregate 3 is due to the fact that individual batches are entered discontinuously in the container 2 and each individually compacted.
  • the intensity fluctuations of the signal emitted by the photo receiver 51 control a control device which accelerates the drive if the light signal received by the receiver 51 is weakened due to the decreasing aerosol density and the reduction in covering delays the drive if the signal of the photo receiver 51 increases due to the higher aerosol density.
  • the regulation is sufficiently quick.
  • the photo-optical control provides significant improvements.
  • the mass flow fluctuations can be kept constant at better than 1% for dry powders and dusts with a diameter of 15 ⁇ m.
  • a further dilution of the aerosol generated in the generator 1 can be achieved by the subsequent injector device 42.
  • dilution factors of up to 10,000 can be achieved, and due to the overall device according to the invention, a significantly lower compressed air consumption is required for the same final dilution.
  • the outlet channel 12 for the solid aerosol is formed in a part 22 which is separate from the housing 21 of the brush 6 and can be separated off in the form of a cover.
  • the outlet channel 13 must have a width y in its receiving area 23 in the region of the brush apex, which corresponds at least to the variable inside diameter of the solid container 2, since the brush corresponds to the diameter of the solid container 2 during operation de width is provided with solid particles; on the other hand, the maximum width x of the outlet channel 12 should not be significantly above these values either.
  • the depth Z in the receiving area 23 of the channel 12 is negligible.
  • the aerosol jet emerging from the channel 12 - made of air and solid particles - should have a cross section with essentially the same width and depth, preferably a circular one, so that measurements are independent of the radial direction of incidence of a measurement light beam.
  • the transition in the outlet ducts of FIGS. 3 and 4 is selected such that the cross section of the duct 12 does not change over the length y, but remains constant. It is particularly important to ensure that the boundary walls of the channel run almost axially parallel to the air jet device both in the inlet area 23 and in the outlet area 24 and that the transitions are continuously smooth, that is to say there are no edges on the channel walls, so that vortices that are used for deposition and / or fluctuating particle flow can be avoided.
  • the outlet channel 12 is completely formed in the separate part or cover 22, so that it can be easily changed and adapted to different requirements or requirements, such as different solid container diameters, different air flow rates, etc.
  • the brush roller 6 is driven by a motor 26 which is completely encapsulated and the housing 27 of which is connected in an airtight manner to the housing 21 of the brush.
  • This embodiment has the effect that the device 1 according to the invention is pressure-resistant and can also be operated at counterpressure at the outlet opening 24 of the outlet channel 12, which could otherwise lead to the aerosol entering the brush and drive bearings.
  • the brush 6 is on the side opposite the motor 26 stored and held in a cover plate 31, which in turn is fastened by means of only two screws 32 to the rest of the housing 27 - which, for example, has a thread.
  • a handle (not shown) can be introduced and by means of this, after loosening the screws 32, the brush roller 6 with the cover plate 31 can be easily removed, which makes brush replacement very easy .
  • the piston feed and return movement, brush movement and air supply can be switched on and off, and the brush speed and feed speed can be regulated.
  • Brush speed, feed speed and fill level are measured and can be called up on a display.
  • a fill level display is provided by connecting a potentiometer to the drive spindle 18, from which a voltage value characteristic of the fill strength is taken and displayed as a fill level.
  • air monitoring is provided, which only enables the piston feed to be switched on when there is sufficient air flow. This also contributes to constant dosing.
  • the solid container 2 removed from the device 1 is carefully stuffed with the powdery solid so that a uniform stuffing density is achieved.
  • the solids container 2 is inserted and fixed in the device 1 in the manner described above.
  • the air supply, brush rotation and piston feed are then switched on.
  • the rotating brush removes a quantity of solid particles determined by the feed speed of the piston 4 from the surface of the solid matter aggregate 3 and conveys them into the air Inlet and the outlet channel 12.
  • the solid particles are loosened by the air flowing through from the brush and taken through the outlet channel 12 to its outlet 24 and carried in an aerosol jet with a high level of constancy, on which the desired measurements, such as measurements for Particle diameter, etc. can be made.

Abstract

1. Apparatus (1) for producing a solid aerosol from a bed, with a solids container (2), a feed piston (4) provided with a drive, a rotating brush (6), an air inlet (11) and an outlet (12), characterized in that a regulating device connected to the drive of the feed piston (4) with a light detector means (41) arranged in the outlet path of the solid aerosol is provided and that the light detector means (41) has a light transmitter (49) and a light receiver (51), which are pivotable relative to one another about the axis (48) of the solid aerosol jet.

Description

Die Erfindung betrifft eine Vorrichtung zur Erzeugung eines Fest­stoffaerosols aus einem Haufwerk, mit einem Feststoffbehälter, einem Vorschubkolben, einer umlaufenden Bürste, einem Lufteinlaß und einem Auslaßkanal.The invention relates to a device for generating a solid aerosol from a pile, with a solid container, a feed piston, a rotating brush, an air inlet and an outlet channel.

Eine derartige Vorrichtung ist aus der DE-OS 25 33 554 bekannt. In den zylindrischen Feststoffbehälter eingefüllter, feinkörni­ger und verdichteter Feststoff, wird mit Hilfe eines Kolbens einem rotierenden Element in Form einer Bürste zugeführt. Die Bürste trennt den Feststoff schichtweise ab. Der erforderliche Luftstrom wird über Lufteinlässe zunächst in die Nähe der Dreh­ achse der Bürste und dann zum Umfang der Bürste in den Bereich geführt, in dem der Feststoff durch die Bürste vom Haufwerk ab­gelöst wird. In diesem Bereich befindet sich ein Aerosolauslaß­stutzen, durch den Luft und Feststoff nach außen geleitet wird. In diesem Bereich befindet sich ein Aerosolauslaßstutzen, durch den Luft und Feststoff nach außen geleitet wird. Die bekannte Vorrichtung weist eine Reihe von Nachteilen auf, so ist der Quer­schnitt des Auslaßstutzens fest vorgegeben und erweitert sich im übrigen zumindestens in Teilbereichen seiner Länge, wodurch es zu Ansatzbildungen im Auslaufkanal durch Anhaften bereits dosierter und von der Luft mitgenommener Feststoffteilchen kom­men kann, was schließlich über periodisches Anwachsen und Ab­lösen von Feststoffteilchen zu Durchsatzschwankungen führt. Da­rüberhinauas ist die bekannte Vorrichtung nicht druckfest; wenn im Auslaßbereich ein Gegendruck herrscht, führt dies dazu, daß Luft und Feststoffteilchen teilweise über die Achslager der Bürste zurückschlagen, dort zu Ablagerungen führen oder austre­ten, so daß auch hierdurch insgesamt die Ergebnisse der Messun­gen verfälscht werden. Darüberhinaus ist die bekannte Vorrich­tung insbesondere im Auslaßbereich, in dem, wie gesagt, Abla­gerungen stattfinden können, schlecht zu reinigen.Such a device is known from DE-OS 25 33 554. Filled, fine-grained and compressed solid in the cylindrical solid container is fed to a rotating element in the form of a brush with the aid of a piston. The brush separates the solid in layers. The required airflow is initially close to the rotary via air intakes axis of the brush and then to the circumference of the brush in the area in which the solid is detached from the pile by the brush. In this area there is an aerosol outlet nozzle through which air and solid matter is led outside. In this area there is an aerosol outlet nozzle through which air and solid matter is led outside. The known device has a number of disadvantages, so the cross section of the outlet port is fixed and expands at least in parts of its length, which can lead to build-up in the outlet channel by adhering already dosed and entrained by the air, which eventually through periodic growth and detachment of solid particles leads to fluctuations in throughput. In addition, the known device is not pressure-resistant; If there is a back pressure in the outlet area, this leads to air and solid particles partially striking back over the axle bearings of the brush, leading to deposits or escaping there, so that the results of the measurements are also falsified as a whole. In addition, the known device is difficult to clean, particularly in the outlet area, in which, as mentioned, deposits can occur.

Beim Einfüllen der Feststoffpartikel in Form eines Hautwerks in den Feststoffbehälter ergibt sich aufgrund des chargenweise Einfüllens von Stoffen eine Schütt- oder Stopfdichtenschwankung der Feststoffteilchen. Diese zeigt sich im erzeugten Feststoff­aerosol als eine Aerosoldichteschwankung.When filling the solid particles in the form of a skin into the solid container, there is a bulk or stuffing density fluctuation of the solid particles due to the batch filling of substances. This shows up in the solid aerosol generated as an aerosol density fluctuation.

Der Erfindung liegt daher die Aufgabe zugrunde, unter Vermeidung der vorgenannten Nachteile, eine Vorrichtung der eingangs ge­nannten Art dahingehend weiterzubilden, daß ein zuverlässiger, konstanter Durchsatz ohne Dichteschwankungen im Aerosol erreicht wird.The invention is therefore based on the object, while avoiding the aforementioned disadvantages, to develop a device of the type mentioned in such a way that a reliable, constant throughput is achieved without fluctuations in density in the aerosol.

Erfindungsgemäß wird die genannte Aufgabe bei einer Vorrichtung der gattungsgemäßen Art dadurch gelöst, daß eine mit dem Antrieb Vorschubkolbens verbundenen Regeleinrichtung mit einer im Aus­laßweg des Feststoffaerosols angeordneten Lichtdetektoreinrich­tung vorgesehen ist. Hierdurch erreicht die erfindungsgemäße Vorrichtung eine ausgezeichnete Konstanz der Dichte.According to the invention, the stated object is achieved in a device of the generic type in that a control device connected to the drive feed piston is provided with a light detector device arranged in the outlet path of the solid aerosol. As a result, the device according to the invention achieves excellent consistency in density.

Da die Empfindlichkeit der Lichtdetektormeßeinrichtung und der Regelung bei maximalen Intensitätsänderungen, die bei vorgege­ner Aerosoldichte bei maximaler vom Fotodetektor aufgenommene Intensität gegeben sind, und die Intensität in Abhängigkeit von Teilchengrößen und Teilchenart veränderlich ist, sieht eine be­vorzugte Ausgestaltung der Erfindung vor, daß die Lichtdetektor­anordnung einen Lichtsender und einen Lichtempfänger aufweist, die relativ zueinander um die Achse des Feststoffaerosolstrahls verschwenkbar sind. In konstruktiv einfacher Weise, kann die Schwenkbeweglichkeit von Lichtsender und Lichtempfäng3er dadurch erreicht werden, daß Lichtsender und -empfänger jeweils in ge­lenkig miteinander verbundenen Rohrteilen angeordnet sind, wo­bei insbesondere vorgesehen ist, daß die Rohrteile über ringar­tig ausgebildete, einen Durchlaß für das Feststoffaerosol frei­lassende Führungen miteinander gelenkig verbunden sind.Since the sensitivity of the light detector measuring device and the control at maximum intensity changes, which are given with the opposite aerosol density at maximum intensity recorded by the photodetector, and the intensity is variable as a function of particle sizes and particle type, a preferred embodiment of the invention provides that the light detector arrangement comprises a light transmitter and has a light receiver which can be pivoted relative to one another about the axis of the solid aerosol jet. In a structurally simple manner, the swiveling mobility of the light transmitter and light receiver can be achieved in that the light transmitter and light receiver are each arranged in articulated pipe parts, it being provided in particular that the pipe parts are connected to one another via ring-shaped guides that leave a passage for the solid aerosol are articulated.

In weiterer Ausgestaltung kann zur weiteren Verdünnung vorge­sehen sein, daß im Aerosolstrahl eine Injektoreinrichtung ange­ordnet ist, wobei die Injektoreinrichtung vorzugsweise hinter der Fotoempfängereinrichtung angeordnet ist, damit letztere noch mit relativ dichtem Aerosolstrom arbeitet, indem die absoluten Dichtschwankungen größer als im endverdünnten Aerosolstrom sind. Eine bevorzugte Ausgestaltung sieht vor, daß der Auslaßkanal über seine Länge hin sich bei vergrößernder Tiefe nicht vergrös­serndem Querschnitt aufweist. durch zumindestens über Teilbe­reiche hin ansteigenden Querschnitt bei der bekannten Vorrich­tung, kommt es so zu Strömungsreduzierungen und damit den ge­nannten Ablagerungen, während durch die erfindungsgemäße Aus­gestaltung zuverlässig eine Strömungsreduzierung im Auslaßkanal vermieden wird, wobei gemäß einer ersten bevorzugten Ausgestal­tung vorgesehen sein kann, daß der Querschnitt des Auslaßkanals sich über dessen Länge hin verkleinert. In diesem Falle kommt es zu einer Erhöhung der Strömungsgeschwindigkeit. Sollte die Strömungsgeschwindigkeit über den gesamten Auslaßkanal hin kon­stant sein, so sieht eine weitere äußerst bevorzugte Ausgestal­tung vor, daß der Querschnitt des Auslaßkanals über dessen ge­samte Länge hin konstant bleibt. Wesentlich ist dabei, daß die Querschnittsform nicht über die gesamte Länge des Auslaßkanals gleichbleibt, sondern sich von einem relativ flachen Bereich dort, wo der Feststoff aufgenommen wird, zu einer Auslaßöffnung des Kanals verändert, bei der Breite und Tiefe im wesentlichen übereinstimmen. Es has sich herausgestallt, daß Breite und Tiefe des Auslaßkanals sich in der Regel nicht linear über die Länge hin ändern können, da dann im Regelfalle die Querschnittsfläche über die Länge hin nicht konstant bleibt, sondern in einem mitt­leren Bereich ein Maximum aufweist, sich also über einen Teilbe­reich vergrößert, was zu den zu vermeidenden Geschwindigkeits­reduzierungen und damit Ablagerungen führen würde. Die erfin­dungsgemäße Aufgabe zur Vermeidung von Feststoffablagerungen, wird insbesondere weiterhin dadurch unterstützt, daß die Begren­zungswandungen des Auslaßkanals ohne Kanten verlaufen und daß Übergänge zwischen Tiefe und Breite des Auslaßkanals begrenzen­den Begrenzungswänden zumindestens abgerundet sind. Insbesondere ist der Querschnitt im Auslaßbereich derart,daß die untere Hälfte der Auslaßöffnung einen Halbkreis bildet,dessen Radius die Hälfte der Höhe der Auslaßöffnung beträgt.In a further embodiment, for further dilution, it can be provided that an injector device is arranged in the aerosol jet, the injector device preferably being arranged behind the photo receiver device, so that the latter still works with a relatively dense aerosol flow, in that the absolute density fluctuations are greater than in the finally diluted aerosol flow. A preferred embodiment provides that the outlet channel has a non-increasing cross-section over its length with increasing depth. due to the cross-section increasing at least over partial areas in the known device, this leads to flow reductions and thus the deposits mentioned, while the inventive design reliably reduces the flow in the outlet channel is avoided, it being possible, according to a first preferred embodiment, for the cross section of the outlet channel to decrease over its length. In this case, the flow velocity increases. If the flow velocity is constant over the entire outlet channel, a further extremely preferred embodiment provides that the cross section of the outlet channel remains constant over its entire length. It is essential that the cross-sectional shape does not remain the same over the entire length of the outlet channel, but rather changes from a relatively flat area where the solid is taken up to an outlet opening of the channel, in which the width and depth essentially match. It has emerged that the width and depth of the outlet duct cannot generally change linearly over the length, since then the cross-sectional area generally does not remain constant over the length, but rather has a maximum in a central region, that is to say over enlarged a partial area, which would lead to the speed reductions to be avoided and thus deposits. The object according to the invention for avoiding solid deposits is in particular further supported in that the boundary walls of the outlet channel run without edges and that transitions between the depth and width of the boundary walls delimiting the outlet channel are at least rounded. In particular, the cross section in the outlet area is such that the lower half of the outlet opening forms a semicircle, the radius of which is half the height of the outlet opening.

In fertigungstechnischer und praktischer Hinsicht hat es sich als vorteilhaft herausgestellt, wenn der Auslaßkanal mit Abstand zur Öffnung des Feststoffbehälters zum Bürstenraum angeordnet ist, wobei der Auslaßkanal insbesondere diametral der Öffnung des Feststoffbehälters zum Bürstenraum hin gegenüberliegt. In diesen Fällen, kann nämlich weiterhin vorgesehen sein, daß der Auslaßkanal in einem von einem Gehäuse der Bürste separaten, abnehmbaren Teil ausgebildet ist. Hierdurch können einerseits die Auslaßkanäle durch Auswechseln des abnehmbaren Teils, daß in Form eines Deckels ausgebildet ist, leicht abgenommen und dann leicht gereinigt werden. Darüberhinaus können sie leicht ausgetauscht werden,wodurch einerseits jeweils in bequemer Weise an das jeweilige Problem angepaßte Auslaßkanäle, beispielsweise an verschiedene Innendurchmesser von Feststoffbehältern ange­paßte Auslaßkanäle eingesetzt werden können und insgesamt grös­sere Arbeitsbereiche,hinsichtlich durchsatz, Massenkonzentration und Volumenstrom überdeckt werden können.From a technical and practical point of view, it has proven to be advantageous if the outlet channel is arranged at a distance from the opening of the solid container to the brush chamber, the outlet channel being diametrically opposite the opening of the solid container to the brush chamber. In these cases, it can be provided that the outlet channel is in a separate from a housing of the brush, removable part is formed. In this way, on the one hand, the outlet ducts can be easily removed and then easily cleaned by replacing the removable part, which is designed in the form of a cover. In addition, they can be easily replaced, so that on the one hand outlet channels adapted to the respective problem, for example outlet channels adapted to different inner diameters of solid containers, can be used in a convenient manner and overall larger work areas with regard to throughput, mass concentration and volume flow can be covered.

Gemäß einer weiteren bevorzugten Ausgestaltung ist vorgesehen, daß Motor und Antrieb der Bürste luftdicht verkapselt sind. Durch diese Ausgestaltung wird erreicht, daß die erfindungsgemäße Vor­richtung druckfest ist und auch Aerosole gegen Gegendruck aus­geblasen werden können. Um beispielsweise ohne größere Probleme an schlecht zugänglichen Stellen Messungen durchführen zu können, ist in weiterer Ausgestaltung vorgesehen, daß sie eine lösbare und entfernbare Bedienungseinheit aufweist.Die Borsten der Bürste können aus Draht oder geeigneten Kunststoffen bestehen.According to a further preferred embodiment it is provided that the motor and drive of the brush are encapsulated airtight. This configuration ensures that the device according to the invention is pressure-resistant and that aerosols can also be blown out against back pressure. In order, for example, to be able to carry out measurements in poorly accessible places without major problems, it is provided in a further embodiment that it has a detachable and removable operating unit. The bristles of the brush can be made of wire or suitable plastics.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus den Ansprüchen und aus der nachfolgenden Beschreibung, in der Ausführungsbeispiele der erfindungsgemäßen Vorrichtung unter Bezugnahme auf die Zeichnung im einzelnen erläutert sind. Da­bei zeigt:

  • Fig. 1 eine schematische Darstellung mit Anordnung von Fotodetektor und Injektoreinrichtung ;
  • Fig. 2 eine schematische Darstellung des konstruktiven Aufbaus der Fotoempfängeranordnung;
  • Fig. 3 einen schematischen Schnitt durch eine erfindungs­gemäße Vorrichtung I-I der Figur 4;
  • Fig. 4 einen Detailschnitt wesentlicher Teile der erfin­dungsgemäßen Vorrichtung entsprechend II-II der Figur 3;
  • Fig. 5 eine Frontdarstellung mit der Andeutung zweier Schnitte, eine Aufsicht und einen Längsschnitt durch einen Auslaßkanal der erfindungsgemäßen Vor­richtung; und
  • Fig. 6 eine Aufsicht auf einen anderen Auslaßkanal.
Further advantages and features of the invention result from the claims and from the following description in which exemplary embodiments of the device according to the invention are explained in detail with reference to the drawing. It shows:
  • Figure 1 is a schematic representation with the arrangement of the photodetector and injector device.
  • Fig. 2 is a schematic representation of the construction of the photo receiver arrangement;
  • 3 shows a schematic section through a device II according to the invention from FIG. 4;
  • 4 shows a detail section of essential parts of the device according to the invention in accordance with II-II of FIG. 3;
  • 5 shows a front view with the indication of two cuts, a top view and a longitudinal section through an outlet channel of the device according to the invention; and
  • Fig. 6 is a plan view of another outlet channel.

Die in der Figur 1 prinzipiell dargestellte erfindungsgemäße Vorrichtung 1 zum Erzeugen eines Feststoffaerosols aus einem Haufwerk weist einen Feststoffbehälter 2 auf, indem sich ge­stopfte Feststoffpartikel 3 befinden. Der Feststoffbehälter ist zylinderförmig ausgebildet. Im Feststoffbehälter 2 ist ein Vor­schubkolben 4 axial beweglich angeordnet, mit dem das Feststoff­haufwerk 3 langsam nach oben befördert werden kann. Am oberen Ende des Feststoffbehälters 2 befindet sich eine umlaufende Bürste 6, die auf ihren Umfang Borsten 7 aus Metall oder Kunststoff aufweist. Auf der der Öffnung 8 des Feststoffbehälters 2 zum Bürstenraum 9 in abgewandter Seite der Bürste 6 ist ein Luft­einlaß 11 sowie ein Auslaßkanal 12 für den Luftstrom und von diesem mitgenommene Feststoff ausgebildet (Figur 3).The device 1 according to the invention, shown in principle in FIG. 1, for producing a solid aerosol from a pile has a solid container 2 in which there are stuffed solid particles 3. The solids container is cylindrical. In the solids container 2, a feed piston 4 is arranged so as to be axially movable, by means of which the solid material 3 can be slowly moved upwards. At the upper end of the solid container 2 there is a peripheral brush 6, which has bristles 7 made of metal or plastic on its circumference. On the opening 8 of the solids container 2 to the brush chamber 9 in the opposite side of the brush 6, an air inlet 11 and an outlet duct 12 for the air flow and the solids entrained by it are formed (FIG. 3).

Der Kolben 4 im Feststoffbehälter 2 wird von einer Vorschubspindel 18 in einer Spindelführung 19 gegebenenfalls über ein Zwischen­element 20 bewegt. Der Feststoffbehälter 2 weist einen Kragen 14 auf, an dem er durch eine in das Gehäuse 15 eingeschobene Sicherungsplatte 16, die eine Handhabe 17 aufweist sicher auch bei Druckaufbau im Inneren der Vorrichtung gehalten wird. Dies ist wichtig für die Dosierkonstanz, da es andernfalls passieren könnte, daß der Behälter sich wenig absenkt, ohne daß der Be­ diener dies merkt, wodurch aber plötzlich mehr Feststoffteilchen abgezogen würden und Dosierschub bewirkt werden könnte, dessen Grund nicht ohne weiteres erkennbar ist. Dieser Nachteil wird durch die Sicherungsplatte sicher vermieden.The piston 4 in the solids container 2 is moved by a feed spindle 18 in a spindle guide 19, optionally via an intermediate element 20. The solids container 2 has a collar 14, on which it is held securely by a locking plate 16 inserted into the housing 15, which has a handle 17, even when pressure builds up inside the device. This is important for the dosing constancy, since it could otherwise happen that the container lowers little without the loading the operator notices this, but this would suddenly pull off more solid particles and cause a metering boost, the reason for which is not readily apparent. This disadvantage is surely avoided by the locking plate.

Dem Gehäuse 15 des eigentlichen Partikelgenerators 1 ist unmit­telbar eine Fotoempfängeranordnung 41 nachgeorndet, die einen Regler zur Regelung der Spannung des Antriebs des Vorschubkol­bens 4 aufweist. Weiterhin ist der Fotoempfängeranordnung 41 beim dargestellten Ausführungsbeispiel eine Injektoreinrichtung 42 nachgeordnet, in der der durch den Partikelgenerator 1 er­zeugte Aerosolstrahl weiter in vorbestimmter Weise verdünnt wer­den kann.The housing 15 of the actual particle generator 1 is immediately followed by a photo receiver arrangement 41, which has a regulator for regulating the voltage of the drive of the feed piston 4. Furthermore, in the exemplary embodiment shown, an injector device 42 is arranged downstream of the photo receiver arrangement 41, in which the aerosol jet generated by the particle generator 1 can be further diluted in a predetermined manner.

Die Fotoempfängeranordnung 41, weist zwei Rohrteile 43, 44 auf, die über ringartig ausgebildete Führungen 46 gelenkig miteinan­der verbunden sind. die ringartigen Führungen 46 umgeben einen Durchlaß 47 für den Aerosolstrahl, dessen Achse der Bewegungs­richtung mit 48 bezeichnet ist. In den beiden Rohrteilen 43, 44 sind jeweils ein Lichtsender 49 und ein Fotoempfänger 51 an­geordnet. Die in der Figur 6 dargestellte Relativschwenkstellung mit einen Relativwinkel von 90 Grad zwischen den beiden Rohr­teilen 43, 44 ist nicht zwangsläufig, die Rohrteile 43, 44 kön­nen derart relativ zueinander um die Achse 48 verschwenkt wer­den, daß das auf den Fotoempfänger 51 fallende Streulicht des Lichtsenders 49 maximal ist, so daß die Fotoempfängereinrich­tung optimale Empfindlichkeit aufweist.The photoreceiver arrangement 41 has two tube parts 43, 44 which are connected to one another in an articulated manner by means of guides 46 designed in the form of rings. the ring-like guides 46 surround a passage 47 for the aerosol jet, the axis of the direction of movement being designated 48. A light transmitter 49 and a photo receiver 51 are arranged in each of the two tube parts 43, 44. The relative pivoting position shown in FIG. 6 with a relative angle of 90 degrees between the two tube parts 43, 44 is not inevitable; the tube parts 43, 44 can be pivoted relative to one another about the axis 48 in such a way that the stray light from the light transmitter falling on the photo receiver 51 49 is maximum, so that the photo receiver device has optimal sensitivity.

Das vom Lichtsender 49 ausgewandte Licht wird an den Teilchen des durch den Durchlaß 47 hindurchtretenden Feststoffaerosol­strahls gestreut, wobei die maximale Intensität des gestreuten Lichts von der Teilchengröße und der Teilchenart abhängt. Die Rohre 43 44 werden derart zueinander verschwenkt, daß das vom Fotoempfänger 51 aufgenommene Streusignal maximal ist. Das vom Fotoempfänger 51 aufgenommene Lichtsignal schwankt in Abhängig­ keit von der Intensität oder Dichte des durch die Einrichtung 41 hindurchtretende Aerosols und zwar im wesentlichen linear, wobei die Dichte des Aersols selbst von der Schütt- oder Stoff­dichte des Haufwerks 3 im Behälter 2 des Partikelgenerators 1 abhängt. Eine unterschiedliche Schütt- oder Stoffdichte des Hauf­werks 3 ist dadurch bedingt, daß in dem Behälter 2 diskontinu­ierlich einzelne Chargen eingegeben und jeweils einzeln ver­dichtet werden. Durch die Intensitätsschwankungen des vom Foto­empfänger 51 abgegebenen Signals wird eine Regeleinrichtung ge­steuert, die den Antrieb beschleunigt, wenn das vom Empfänger 51 aufgenommene Lichtsignal aufgrund abnehmender Aerosoldichte geschwächt wird und die Bespannungsverminderung den Antrieb ver­zögert, wenn das Signal des Fotoempfängers 51 aufgrund größerer Aerosoldichte ansteigt. Die Regelung ist ausreichend schnell. Gegenüber einen ungeregelten Aerosolstrahl werden durch die foto­optische Regelung wesentliche Verbesserungen erhalten. Die Mas­senstromschwankungen können bei trockenen Pulvern und Stäuben mit Durchmessern von 15 um besser als 1% konstant gehalten werden.The light emitted by the light transmitter 49 is scattered on the particles of the solid aerosol jet passing through the passage 47, the maximum intensity of the scattered light depending on the particle size and the particle type. The tubes 43 44 are pivoted relative to one another in such a way that the scatter signal picked up by the photo receiver 51 is at a maximum. The light signal picked up by the photo receiver 51 fluctuates depending speed of the intensity or density of the aerosol passing through the device 41, namely essentially linear, the density of the aerosol itself depending on the bulk or material density of the aggregate 3 in the container 2 of the particle generator 1. A different bulk or material density of the aggregate 3 is due to the fact that individual batches are entered discontinuously in the container 2 and each individually compacted. The intensity fluctuations of the signal emitted by the photo receiver 51 control a control device which accelerates the drive if the light signal received by the receiver 51 is weakened due to the decreasing aerosol density and the reduction in covering delays the drive if the signal of the photo receiver 51 increases due to the higher aerosol density. The regulation is sufficiently quick. Compared to an uncontrolled aerosol jet, the photo-optical control provides significant improvements. The mass flow fluctuations can be kept constant at better than 1% for dry powders and dusts with a diameter of 15 µm.

Durch die nachfolgende Injektoreinrichtung 42 kann eine weitere Verdünnung des im Generator 1 erzeugten Aerosols erreicht wer­den. Durch Kaskadenanordnungen von einzelnen Injektorelementen sind Verdünnungsfaktoren von bis zu 10.000 erzielbar, wobei auf­grund der erfindungsgemäßen Gesamtvorrichtung bei gleicher End­verdünnung ein wesentlich geringerer Preßluftverbrauch erfor­derlich ist.A further dilution of the aerosol generated in the generator 1 can be achieved by the subsequent injector device 42. Through cascade arrangements of individual injector elements, dilution factors of up to 10,000 can be achieved, and due to the overall device according to the invention, a significantly lower compressed air consumption is required for the same final dilution.

Der Auslaßkanal 12 für das Feststoffaerosol ist in einem vom Gehäuse 21 der Bürste 6 separaten und abtrennbaren Teil 22 in Form eines Deckels ausgebildet. Der Auslaßkanal 13 muß in sei­nem aufnahmebereich 23 im Bereich des Bürstenscheitels eine Breite y aufweisen,die zumindestens dem variablen Innendurchmes­ser des Feststoffbehälters 2 entspricht, da die Bürste im Betrieb über eine dem Durchmesser des Feststoffbehälters 2 entsprechen­ de Breite mit Feststoffteilchen versehen wird; andererseits soll die maximale Breite x des Auslaßkanals 12 auch nicht wesentlich über diesen Werten liegen. Die Tiefe Z im Aufnahmebereich 23 des Kanals 12 ist vernachlässigbar. Der aus dem Kanal 12 aus­tretende Aerosolstrahl - aus Luft und Feststoffpartikeln - sollte einen Querschnitt mit im wesentlichen gleicher Breite und Tiefe aufweisen, vorzugsweise einen kreisförmigen, damit Messungen unabhängig von der radialen Einstrahlrichtung eines Meßlicht­strahls sind. In bevorzugter Ausgestaltung ist der Übergang bei den Auslaßkanälen der Figuren 3 und 4 derart gewählt, daß der Querschnitt des Kanals 12 sich über die Länge y hin nicht än­dert, sondern konstant bleibt. Dabei ist insbesondere darauf geachtet, daß die Begrenzungswände des Kanals sowohl im Einlaß­bereich 23 als auch im Auslaßbereich 24 nahezu achsparallel zur Luftstrahleinrichtung verlaufen und die Übergänge stetig weich sind, also keine Kanten an den Kanalwänden vorhanden sind, so daß Wirbel, die zur Ablagerung und/oder schwankendem Partikel­mengenstrom führen könnte, vermieden werden.The outlet channel 12 for the solid aerosol is formed in a part 22 which is separate from the housing 21 of the brush 6 and can be separated off in the form of a cover. The outlet channel 13 must have a width y in its receiving area 23 in the region of the brush apex, which corresponds at least to the variable inside diameter of the solid container 2, since the brush corresponds to the diameter of the solid container 2 during operation de width is provided with solid particles; on the other hand, the maximum width x of the outlet channel 12 should not be significantly above these values either. The depth Z in the receiving area 23 of the channel 12 is negligible. The aerosol jet emerging from the channel 12 - made of air and solid particles - should have a cross section with essentially the same width and depth, preferably a circular one, so that measurements are independent of the radial direction of incidence of a measurement light beam. In a preferred embodiment, the transition in the outlet ducts of FIGS. 3 and 4 is selected such that the cross section of the duct 12 does not change over the length y, but remains constant. It is particularly important to ensure that the boundary walls of the channel run almost axially parallel to the air jet device both in the inlet area 23 and in the outlet area 24 and that the transitions are continuously smooth, that is to say there are no edges on the channel walls, so that vortices that are used for deposition and / or fluctuating particle flow can be avoided.

Der Auslaßkanal 12 ist vollständig in dem separaten Teil oder Deckel 22 ausgebildet, so daß er leicht gewechselt und an unter­schiedliche Voraussetzungen bzw. Anforderungen, wie unterschied­liche Feststoffbehälterdurchmesser, unterschiedliche Luftmengen­durchsätze etc. angepaßt werden kann.The outlet channel 12 is completely formed in the separate part or cover 22, so that it can be easily changed and adapted to different requirements or requirements, such as different solid container diameters, different air flow rates, etc.

Die Bürstenwalze 6 wird von einem Motor 26 angetrieben, der voll­ständig gekapselt ist, und dessen Gehäuse 27 luftdicht mit dem Gehäuse 21 den Bürste verbunden ist. Diese Ausgestaltung be­wirkt, daß die erfindungsgemäße Einrichtung 1 druckfest ist und auch bei Gegendruck an der Auslaßöffnung 24 des Auslaßkanals 12 betrieben werden kann, was andernfalls zu einem Eintreten des Aerosols in die Lager der Bürste und des Antriebs führen könnte.The brush roller 6 is driven by a motor 26 which is completely encapsulated and the housing 27 of which is connected in an airtight manner to the housing 21 of the brush. This embodiment has the effect that the device 1 according to the invention is pressure-resistant and can also be operated at counterpressure at the outlet opening 24 of the outlet channel 12, which could otherwise lead to the aerosol entering the brush and drive bearings.

Die Bürste 6 ist auf der den Motor 26 gegenüberliegenden Seite in eine Abdeckplatte 31 gelagert und gehalten, die wierderum mit­tels lediglich zweier Schrauben 32 am restlichen Gehäuse 27 - die beispielsweise ein Gewinde aufweist - befestigt ist. In eine Ausnehmung (33) des dem Motor 26 abgewandten Endes der Welle der Bürstenwalze 6, kann eine Handhabe (nicht dargestellt) ein­gebracht und mittels dieser nach Lösen der Schrauben 32 die Bürstenwalze 6 mit der Abdeckplatte 31 leicht entfernbar werden, was der Bürstenwechsel sehr erleichtert.The brush 6 is on the side opposite the motor 26 stored and held in a cover plate 31, which in turn is fastened by means of only two screws 32 to the rest of the housing 27 - which, for example, has a thread. In a recess (33) of the end of the shaft of the brush roller 6 facing away from the motor 26, a handle (not shown) can be introduced and by means of this, after loosening the screws 32, the brush roller 6 with the cover plate 31 can be easily removed, which makes brush replacement very easy .

Über ein im einzelnen nicht dargestelltes lösbares und entfern­bares Bedienungspaneel, können Kolbenvorschub und -Rückbewegung, Bürstenbewegung sowie Luftzufuhr ein und abgeschaltet sowie Bürstengeschwindigkeit und Vorschubgeschwindigkeit geregelt wer­den. Bürstendrehzahl, Vorschubgeschwindigkeit und Füllstand wer­den gemessen und können auf einer Anzeige abgerufen werden.Weiter­hin ist eine Füllstandsanzeige vorgesehen, indem mit der An­triebsspindel 18 ein Potentiometer verbunden ist, von welchem ein für den Füllstärt charakteristischer Spannungswert abgenom­men und als Füllstandshöhe angezeigt wird. Damit ein Vorschub des Kolbens im Feststoffbehälters bei keiner oder zu geringer Luftzufuhr verhindert wird, ist eine Luftüberwachung vorgesehen, die Einschalten des Kolbensvorschubs nur bei ausreichender Luft­strömung ermöglicht. Dies trägt ebenfalls zur Dosierkonstanz bei.Via a detachable and removable operating panel, not shown in detail, the piston feed and return movement, brush movement and air supply can be switched on and off, and the brush speed and feed speed can be regulated. Brush speed, feed speed and fill level are measured and can be called up on a display. Furthermore, a fill level display is provided by connecting a potentiometer to the drive spindle 18, from which a voltage value characteristic of the fill strength is taken and displayed as a fill level. To prevent the piston from advancing in the solids container when there is no or too little air supply, air monitoring is provided, which only enables the piston feed to be switched on when there is sufficient air flow. This also contributes to constant dosing.

Zur Erzeugung eines Feststoffaerosols wird der aus der Vorrich­tung 1 entnommene Feststoffbehälter 2 sorgfältig mit dem pulver­förmigen Feststoff gestopft, so daß eine gleichmäßige Stopfdich­te erreicht wird. Der Feststoffbehälter 2 wird in der oben be­schriebenen Weise in die Vorrichtung 1 eingesetzt und festge­legt. Anschließend werden Luftzufuhr, Bürstendrehung und Kolben­vorschub eingeschaltet. Die sich drehende Bürste nimmt mit ihren Borsten 7 von der Oberfläche des Feststoffhaufwerks 3 eine durch die Vorschubgeschwindigkeit des Kolbens 4 bestimmte Menge an Feststoffpartikeln ab und fördert diese in den Bereich des Luft­ einlasses und des Auslaßkanals 12. In diesem Bereich werden die Feststoffpartikel durch die durchströmende Luft von der Bürste gelöst und durch den Auslaßkanal 12 zu dessen Auslaß 24 hin mit­genommen und in einem Aerosolstrahl mit hoher Mengenkonstanz mitgenommen, an dem dann die gewünschten Messungen, wie Mes­sungen zum Partikeldurchmesser etc. vorgenommen werden können.To generate a solid aerosol, the solid container 2 removed from the device 1 is carefully stuffed with the powdery solid so that a uniform stuffing density is achieved. The solids container 2 is inserted and fixed in the device 1 in the manner described above. The air supply, brush rotation and piston feed are then switched on. With its bristles 7, the rotating brush removes a quantity of solid particles determined by the feed speed of the piston 4 from the surface of the solid matter aggregate 3 and conveys them into the air Inlet and the outlet channel 12. In this area, the solid particles are loosened by the air flowing through from the brush and taken through the outlet channel 12 to its outlet 24 and carried in an aerosol jet with a high level of constancy, on which the desired measurements, such as measurements for Particle diameter, etc. can be made.

Claims (15)

1. Vorrichtung zur Erzeugung eines Feststoffaerosols aus einem Haufwerk, mit einem Feststoffbehälter, einem mit einem An­trieb versehenen Vorschubkolben, einer umlaufenden Bürste, einem Lufteinlaß und einem Auslaß, insbesondere nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß eine mit dem Antrieb des Vorschubkolbens (4) verbundenen Regeleinrichtung mit einer im Auslaßweg des Feststoffaero­sols angeordneten Lichtdetektoreinrichtung (41) vorgesehen ist.1. Device for generating a solid aerosol from a pile, with a solid container, a drive piston provided with a drive piston, a rotating brush, an air inlet and an outlet, in particular according to one of the preceding claims, characterized in that one with the drive of the feed piston ( 4) connected control device is provided with a light detector device (41) arranged in the outlet path of the solid aerosol. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Lichtdetektoranordnung (41) einen Lichtsender (49) und einen Lichtempfänger (51) aufweist die relativ zueinander um die Achse (48) des Feststoffaerosolstrahls verschwenkbar sind.2. Device according to claim 1, characterized in that the light detector arrangement (41) has a light transmitter (49) and a light receiver (51) which can be pivoted relative to one another about the axis (48) of the solid aerosol jet. 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß Lichtsender (49) und empfänger (51) jeweils in gelenkig miteinander verbundenen Rohrteilen (43,44) angeordnet sind.3. Apparatus according to claim 2, characterized in that light transmitter (49) and receiver (51) are each arranged in articulated tubular parts (43,44). 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Rohrteile (43, 44) über ringartige ausgebildete einen Durchlaß für das Feststoffaerosol freilassende Führungen (45) miteinander gelenkig verbunden sind.4. The device according to claim 3, characterized in that the tubular parts (43, 44) via ring-shaped a passage for the solid aerosol leaving guides (45) are hinged together. 5. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet daß im Aerosolstrahl eine Injektoreinrich richtung (42) angeordnet ist.5. Device according to one of the preceding claims, characterized in that an injector device (42) is arranged in the aerosol jet. 6. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet daß der Auslaßkanal (12) mit Abstand zur Öffnung (7) des Feststoffbehälters (2) zum Bürstenraum (9) angeordnet ist.6. Device according to one of the preceding claims, characterized in that the outlet channel (12) is arranged at a distance from the opening (7) of the solids container (2) to the brush chamber (9). 7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der Auslaßkanal (12) der Öffnung (7) des Feststoffbehälters (2) zum Bürstenraum (9) diametral gegenüberliegt.7. The device according to claim 6, characterized in that the outlet channel (12) of the opening (7) of the solid container (2) to the brush chamber (9) is diametrically opposite. 8. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet daß der Auslaßkanal (12) in einem von einem Gehäuse (21) der Bürste (6) separaten, abnehmbaren Teil (22) ausgebildet ist.8. Device according to one of the preceding claims, characterized in that the outlet channel (12) in one of a housing (21) of the brush (6) separate, removable part (22) is formed. 9. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß Motor (26) und Antrieb der Bürste (6) luftdicht verkapselt ist.9. Device according to one of the preceding claims, characterized in that the motor (26) and drive of the brush (6) is encapsulated airtight. 10. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Feststoffbehälter (2) durch eine horizontal einschiebbare und festlegbare Sicherungsplatte (16) gehalten ist.10. Device according to one of the preceding claims, characterized in that the solids container (2) is held by a horizontally insertable and lockable securing plate (16). 11. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß eine abnehmbare seitliche Deckplatte (32) vorgesehen ist an der die Bürstenwalze (6) gelagert ist.11. Device according to one of the preceding claims, characterized in that a removable side cover plate (32) is provided on which the brush roller (6) is mounted. 12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß in dem Wellensatz der Bürstenwalze (6), mit der diese in der Abdeckplatte (32) gelagert ist, eine Ausnehmung (33) zur Aufnahme einer Handhabe ausgebildet ist.12. The apparatus according to claim 11, characterized in that in the shaft set of the brush roller (6) with which it is mounted in the cover plate (32), a recess (33) is formed for receiving a handle. 13. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der durch den Vorschubkolben gefährde­ten Feststoff aufnehmende Auslaßkanal (12) über seine Länge (y) hin bei vergrößernder Tiefe (z) sich nicht vergrößern­den Querschnitt aufweist.13. Device according to one of the preceding claims, characterized in that the outlet channel (12) receiving solid which is endangered by the feed piston has a non-increasing cross section over its length (y) with increasing depth (z). 14. Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß der Querschnitt des Auslaßkanals (12) sich über dessen Länge (y) hin verkleinert.14. The apparatus according to claim 13, characterized in that the cross section of the outlet channel (12) decreases over its length (y). 15. Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, daß der Querschnitt des Auslaßkanals (12) über dessen gesamte Länge (y) hin konstant bleibt.15. The apparatus according to claim 13, characterized in that the cross section of the outlet channel (12) remains constant over its entire length (y).
EP87105705A 1986-05-22 1987-04-16 Device for producing a solid material aerosol Expired - Lifetime EP0246454B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87105705T ATE57316T1 (en) 1986-05-22 1987-04-16 DEVICE FOR GENERATION OF A SOLID AEROSOL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3617232 1986-05-22
DE19863617232 DE3617232A1 (en) 1986-05-22 1986-05-22 DEVICE FOR PRODUCING A SOLID FEROSOL

Publications (3)

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EP0246454A2 true EP0246454A2 (en) 1987-11-25
EP0246454A3 EP0246454A3 (en) 1988-10-12
EP0246454B1 EP0246454B1 (en) 1990-10-10

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EP87105705A Expired - Lifetime EP0246454B1 (en) 1986-05-22 1987-04-16 Device for producing a solid material aerosol

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EP (1) EP0246454B1 (en)
AT (1) ATE57316T1 (en)
DE (2) DE3617232A1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2004097955A1 (en) * 2003-04-30 2004-11-11 Basf Aktiengesellschaft Pulverized organic semiconductors and method for vapor phase deposition onto a support
EP2944610A1 (en) * 2014-05-14 2015-11-18 Kalkfabrik Netstal AG Bearing forms for calcium oxide rich dusts and device and method for providing calcium oxide rich dusts

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017130981B3 (en) 2017-12-21 2019-06-19 Horiba Europe Gmbh System for providing an aerosol

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DE1261758B (en) * 1963-05-08 1968-02-22 Savin Business Machines Corp Electrophotographic copier
GB1173937A (en) * 1966-09-24 1969-12-10 Bosch Gmbh Robert Improvements in Apparatus for Measuring the Concentration of Flowing Gaseous Suspensions
US3997433A (en) * 1975-07-18 1976-12-14 Liu Benjamin Y H Method and apparatus for generating dry dust particles
GB2100145A (en) * 1981-06-16 1982-12-22 Ts K Bjuro Leninskaya Kuznitsa Apparatus for detonation coating
DE8515780U1 (en) * 1985-05-30 1985-08-01 Palas GmbH Partikel- und Lasermeßtechnik, 7514 Eggenstein-Leopoldshafen Device for generating a solid aerosol

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DE2533554A1 (en) * 1975-07-26 1977-02-10 Rumpf Hans Prof Dr Ing Feeder for fine powders used for gas-solid aerosols - with rotating brush prosecting the particles into an air stream

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1261758B (en) * 1963-05-08 1968-02-22 Savin Business Machines Corp Electrophotographic copier
GB1173937A (en) * 1966-09-24 1969-12-10 Bosch Gmbh Robert Improvements in Apparatus for Measuring the Concentration of Flowing Gaseous Suspensions
US3997433A (en) * 1975-07-18 1976-12-14 Liu Benjamin Y H Method and apparatus for generating dry dust particles
GB2100145A (en) * 1981-06-16 1982-12-22 Ts K Bjuro Leninskaya Kuznitsa Apparatus for detonation coating
DE8515780U1 (en) * 1985-05-30 1985-08-01 Palas GmbH Partikel- und Lasermeßtechnik, 7514 Eggenstein-Leopoldshafen Device for generating a solid aerosol

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004097955A1 (en) * 2003-04-30 2004-11-11 Basf Aktiengesellschaft Pulverized organic semiconductors and method for vapor phase deposition onto a support
EP2944610A1 (en) * 2014-05-14 2015-11-18 Kalkfabrik Netstal AG Bearing forms for calcium oxide rich dusts and device and method for providing calcium oxide rich dusts

Also Published As

Publication number Publication date
EP0246454A3 (en) 1988-10-12
DE3617232A1 (en) 1987-11-26
ATE57316T1 (en) 1990-10-15
EP0246454B1 (en) 1990-10-10
DE3765459D1 (en) 1990-11-15

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