EP2722103A2 - Forced mixer with self-cleaning function and use of air inlets therefor - Google Patents

Forced mixer with self-cleaning function and use of air inlets therefor Download PDF

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Publication number
EP2722103A2
EP2722103A2 EP20130189061 EP13189061A EP2722103A2 EP 2722103 A2 EP2722103 A2 EP 2722103A2 EP 20130189061 EP20130189061 EP 20130189061 EP 13189061 A EP13189061 A EP 13189061A EP 2722103 A2 EP2722103 A2 EP 2722103A2
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EP
European Patent Office
Prior art keywords
mixing
shaft
air
compulsory mixer
agitator
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.)
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Application number
EP20130189061
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German (de)
French (fr)
Other versions
EP2722103A3 (en
Inventor
Harald Kniele
Alexander Kniele
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Individual
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Individual
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Publication date
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Publication of EP2722103A2 publication Critical patent/EP2722103A2/en
Publication of EP2722103A3 publication Critical patent/EP2722103A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/102—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration with means for agitating the liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/09—Stirrers characterised by the mounting of the stirrers with respect to the receptacle
    • B01F27/091—Stirrers characterised by the mounting of the stirrers with respect to the receptacle with elements co-operating with receptacle wall or bottom, e.g. for scraping the receptacle wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/19—Stirrers with two or more mixing elements mounted in sequence on the same axis
    • B01F27/192—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements
    • B01F27/1921—Stirrers with two or more mixing elements mounted in sequence on the same axis with dissimilar elements comprising helical elements and paddles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/84—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with two or more stirrers rotating at different speeds or in opposite directions about the same axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/402—Mixers using gas or liquid agitation, e.g. with air supply tubes comprising supplementary stirring elements
    • B01F33/4021—Mixers using gas or liquid agitation, e.g. with air supply tubes comprising supplementary stirring elements the gas being introduced through the shaft of the stirring element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
    • B01F35/1452—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/46—Arrangements for applying super- or sub-atmospheric pressure during mixing; Arrangements for cooling or heating during mixing, e.g. by introducing vapour
    • B28C5/462—Mixing at sub- or super-atmospheric pressure

Definitions

  • the invention relates to a compulsory mixer for mixing liquid, powdery and / or granular components, such as concrete mixtures, and the use of air inlets, in particular for cleaning such a forced mixer.
  • a compulsory mixer of the type mentioned is for example from the DE 1 116 195 B or the EP 1 121 193 B1 known.
  • the mixers described in these publications each have a mixing container, along the central axis of which an internal agitator is mounted, which is in the form of a screw.
  • an external agitator is still present, which performs an edge-side mixing of the material to be mixed and can be in contact with walls of the mixing container or can reach near the walls.
  • a compulsory mixer for mixing components comprises a mixing vessel, wherein an agitator is formed along an axis of the mixing vessel, comprising a shaft with mixing blades attached thereto, wherein at least one air inlet, preferably several air inlets, e.g. Air nozzles are coupled to the shaft, which are designed for feeding air into the mixing container.
  • mixing blade as used in the context of the invention, it is intended to include any type of mixing tool which is suitable for imparting a relative movement to the components to be mixed.
  • the special shape of the mixing blades is not decisive here.
  • mixing blades can be used in blade form, as helixes or in the form of coulters.
  • the shaft of the agitator fulfills two functions: Firstly, the material present in the mixing container is mixed when the shaft of the mixing container rotates about its own axis, as is usual in such mixers, wherein they also mix the mixing blades Rotational movement are entrained around this axis.
  • air can be introduced into the mixing vessel or into the material to be mixed via the shaft through air inlets provided therefor.
  • the air supply is preferably controllable by the user regardless of the rotational movement of the shaft.
  • the time and duration of the connection of the Lucaseinspeisevorraum can be selected by the user depending on the need for cleaning.
  • air is introduced into the mixing tank filled with water.
  • the resulting air bubbles cause, depending on their size and amount turbulence and turbulence of the water and the aggregates, resulting in particular along the inside of the housing and the agitator to higher flow velocities, which impurities are "entrained".
  • the internal agitator can run forward and backward during cleaning, resulting in a further improvement of the cleaning effect.
  • the air feed can also take place when the mixing container is filled with a mixed material.
  • a mixed material For example, when producing lightweight concrete, it is possible to introduce any amount of air into the material to be mixed.
  • the shaft is designed as a hollow shaft, wherein the Heileinspeisevortechnik is provided inside the hollow shaft.
  • the Lufteinspeisevorectomy has the advantage that the Heileinspeisevorectomy claimed in addition to the necessary for mixing components of the agitator no additional space in the interior of the mixing container.
  • the connection of the Heileinspeisevortechnik outward can be realized in this embodiment, for example by means of a rotary feedthrough.
  • the air inlets are preferably provided at the lower end of the shaft. But they can also extend along the entire height or portions of the shaft. It is particularly advantageous if the air inlets a so-called Ausströmerstein is connected upstream. Depending on the nature and condition of the Ausströmersteins the bubble size can be varied accordingly and thus a homogeneous mixing can be achieved.
  • the air inlets prefferably be arranged exclusively or additionally along the inside of the housing jacket in order to feed air from outside into the mixing container.
  • the air feed device has a control device, wherein the air flow rate is adjustable by a user.
  • the air flow rate is adjustable by a user.
  • the control device it can be integrated into the controller for the mixed operation of the forced mixer.
  • the controller is designed so that the air feed device is driven in the interval mode. That is, when a drive mode for the interval operation is selected by the user, the air supply device turns on and off after a predetermined time interval, respectively.
  • This activation mode can be particularly advantageous in optimizing the cleaning or mixing process.
  • the air supply via the air supply line can be done for example by means of an electric air pump.
  • the compulsory mixer can be, for example, a so-called “cone mixer", in which the mixing container is funnel-shaped or cone-shaped.
  • the compulsory mixer may comprise, in addition to an internal stirrer, which may be in the form of a screw, for example, a further agitator having mixing blades which are drivable for rotational movement along an inner wall of the funnel-shaped mixing container.
  • the additional or external agitator causes an additional mixing of the mixed material, whereby the mixing container is optimally utilized.
  • the invention further relates to the use of air intakes for feeding air into such a forced mixer.
  • FIG. 1 an embodiment of a compulsory mixer according to the invention in cross section.
  • FIG. 1 shown compulsory mixer is indicated in its entirety by the reference numeral 10. It comprises a mixing container 1, which, as can be seen in the figure, is formed at least in its lower part with a conical or funnel-shaped housing 1a.
  • the shape of the mixing container However, in the context of the present invention, FIG. 1 is not to be regarded as limiting.
  • the agitator 2, 3 comprises an internal agitator 2, which is constructed from a shaft 2a and mixing blades 2b mounted thereon, wherein the mixing blades 2b are here arranged helically on the shaft 2a.
  • the shaft 2a extends along an axis A of the mixing container 1, wherein the axis A is indicated in the figure by a dashed line.
  • the outer agitator 3 comprises a shaft 3a, which is here arranged concentrically to the shaft 2a, with mixing arms 3b attached thereto, which are provided at their ends with mixing blades 3c.
  • the mixing blades 3c stroke along the inside of the housing 1a of the mixing container 1. It should be noted that the presence of the outer agitator 3 in the context of the present invention is not mandatory.
  • the embodiment according to the invention has air inlets 4b, which are formed here at the lower end of the shaft 2a.
  • the air supply line 4 a is inserted into the interior of the shaft 2 a according to this embodiment, so that it does not claim any additional space in the interior of the mixing container 1.
  • additional air inlets are provided in the form of nozzles on the housing 1a.
  • the air feed device 4 comprises an air feed line 4a and the air inlets 4b connected to the air feed line.
  • the air supply line 4a is guided in the interior of the shaft 2a down.
  • the air supply line 4a is connected via a rotary feedthrough 5 to the outside, wherein the rotary feedthrough 5 simultaneously seals the interior of the shaft 2a to the outside.
  • the air supply can be done by an electric air pump (not shown in the figure) via the air supply line 4a.
  • the cleaning water or mixed material air is supplied in the form of air bubbles in the desired amount and the compulsory mixer 10 can also be cleaned with little effort, or can be easily manufactured lightweight concrete.
  • the connection of the air feed device 4 can be carried out both during the mixing process, when the mixing blades 2 b driven by the shaft 2 a perform a rotational movement, as well as at standstill of the forced mixer 10.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

The forced concrete mixer (10) has agitator (2) in form of screw, which is provided along an axis (A) of the mixing container (1). The agitator comprises mixing blades (2b) attached to shaft (2a). An air inlet (4b) is coupled to the shaft and is designed to feed air into mixing container. The shaft is designed as hollow shaft.

Description

Die Erfindung betrifft einen Zwangsmischer zum Mischen von flüssigen, pulverförmigen und/oder körnigen Komponenten, wie beispielsweise Betonmischungen, sowie die Verwendung von Lufteinlässen, insbesondere zum Reinigen eines solchen Zwangsmischers.The invention relates to a compulsory mixer for mixing liquid, powdery and / or granular components, such as concrete mixtures, and the use of air inlets, in particular for cleaning such a forced mixer.

Ein Zwangsmischer der genannten Art ist beispielsweise aus der DE 1 116 195 B oder der EP 1 121 193 B1 bekannt. Die in diesen Druckschriften beschriebenen Mischer weisen jeweils einen Mischbehälter auf, entlang dessen Mittelachse ein inneres Rührwerk montiert ist, welches in Form einer Schnecke ausgebildet ist. Darüber hinaus ist noch jeweils ein äußeres Rührwerk vorhanden, welches eine randseitige Durchmischung des zu mischenden Materials durchführt und mit Wänden des Mischbehälters in Kontakt stehen kann bzw. in die Nähe der Wände heranreichen kann.A compulsory mixer of the type mentioned is for example from the DE 1 116 195 B or the EP 1 121 193 B1 known. The mixers described in these publications each have a mixing container, along the central axis of which an internal agitator is mounted, which is in the form of a screw. In addition, an external agitator is still present, which performs an edge-side mixing of the material to be mixed and can be in contact with walls of the mixing container or can reach near the walls.

Für gewöhnlich werden derartige Zwangsmischer nach ihrer Benutzung mit Hochdruckreinigern oder unter Zuhilfenahme eines Wasserschlauchs gesäubert. Insbesondere beim Einsatz des Zwangsmischers zum Mischen von Beton kommt es jedoch vor, dass gerade an dem Mischwerkzeug des inneren Rührwerks Betonklumpen haften bleiben, wobei es in einem solchen Fall häufig notwendig ist, diese Verunreinigungen manuell mittels Hämmern und Meißeln zu entfernen. Diese Art der Reinigung ist jedoch sehr zeit- und arbeitsaufwändig. Die Entfernung der genannten Verschmutzungen ist somit mit einem verhältnismäßig hohen Zeitaufwand und dem Einsatz verschiedener Hilfsmittel verbunden.Usually, such compulsory mixers are cleaned after use with high-pressure cleaners or with the aid of a water hose. In particular, when using the compulsory mixer for mixing concrete, it happens, however, that just adhere to the mixing tool of the internal agitator concrete clumps, and it is often necessary in such a case to remove these impurities manually by hammering and chiselling. However, this type of cleaning is very time consuming and labor intensive. The removal of said contaminants is thus associated with a relatively high amount of time and the use of various tools.

Es ist daher eine Aufgabe der Erfindung, einen Zwangsmischer der eingangs genannten Art bereitzustellen, bei dem der Reinigungsaufwand beträchtlich verringert werden kann. Darüber hinaus ist es eine Aufgabe der Erfindung, die Verwendung einer geeigneten Reinigungsvorrichtung für den Zwangsmischer aufzuzeigen.It is therefore an object of the invention to provide a compulsory mixer of the type mentioned, in which the cleaning effort can be considerably reduced. Moreover, it is an object of the invention to demonstrate the use of a suitable cleaning device for the compulsory mixer.

Diese Aufgaben werden erfindungsgemäß durch einen Zwangsmischer nach den Ansprüchen 1 und 3 sowie eine Verwendung nach Anspruch 10 gelöst. Bevorzugte Ausgestaltungen sind Gegenstand der Unteransprüche.These objects are achieved by a compulsory mixer according to claims 1 and 3 and a use according to claim 10. Preferred embodiments are the subject of the dependent claims.

Ein Zwangsmischer zum Mischen von Komponenten gemäß den Ausführungsformen der Erfindung weist einen Mischbehälter auf, wobei entlang einer Achse des Mischbehälters ein Rührwerk ausgebildet ist, welches eine Welle mit daran angebrachten Mischflügeln umfasst, wobei mindestens ein Lufteinlass, vorzugsweise mehrere Lufteinlässe, wie z.B. Luftdüsen an die Welle gekoppelt sind, die zur Einspeisung von Luft in den Mischbehälter ausgelegt sind.A compulsory mixer for mixing components according to embodiments of the invention comprises a mixing vessel, wherein an agitator is formed along an axis of the mixing vessel, comprising a shaft with mixing blades attached thereto, wherein at least one air inlet, preferably several air inlets, e.g. Air nozzles are coupled to the shaft, which are designed for feeding air into the mixing container.

Was den Ausdruck "Mischflügel" betrifft, wie er im Rahmen der Erfindung verwendet wird, so soll er jede Art von Mischwerkzeug umfassen, welches dazu geeignet ist, den zu mischenden Komponenten eine Relativbewegung zu erteilen. Dabei ist die spezielle Form der Mischflügel nicht ausschlaggebend. So können beispielsweise Mischflügel in Schaufelform, als Wendeln oder in Form von Scharen eingesetzt werden.As regards the term "mixing blade", as used in the context of the invention, it is intended to include any type of mixing tool which is suitable for imparting a relative movement to the components to be mixed. The special shape of the mixing blades is not decisive here. Thus, for example, mixing blades can be used in blade form, as helixes or in the form of coulters.

Bei dem erfindungsgemäßen Zwangsmischer erfüllt die Welle des Rührwerks zwei Funktionen: Zum einen wird das in dem Mischbehälter vorhandene Material vermischt, wenn die Welle des Mischbehälters sich um die eigene Achse dreht, wie dies bei derartigen Mischern üblich ist, wobei sie die Mischflügel ebenfalls zu einer Rotationsbewegung um diese Achse mitführt werden. Darüber hinaus kann über die Welle jedoch durch daran vorgesehene Lufteinlässe, Luft in den Mischbehälter bzw. in das zu mischende Material eingebracht werden. Die Luftzufuhr ist dabei vorzugsweise vom Benutzer unabhängig von der Rotationsbewegung der Welle steuerbar. Auch der Zeitpunkt sowie die Dauer des Zuschaltens der Lufteinspeisevorrichtung können dabei vom Benutzer je nach Reinigungsbedarf gewählt werden.In the compulsory mixer according to the invention, the shaft of the agitator fulfills two functions: Firstly, the material present in the mixing container is mixed when the shaft of the mixing container rotates about its own axis, as is usual in such mixers, wherein they also mix the mixing blades Rotational movement are entrained around this axis. In addition, however, air can be introduced into the mixing vessel or into the material to be mixed via the shaft through air inlets provided therefor. The air supply is preferably controllable by the user regardless of the rotational movement of the shaft. Also, the time and duration of the connection of the Lufteinspeisevorrichtung can be selected by the user depending on the need for cleaning.

Um die Reinigungseffizienz zu erhöhen, wird in den mit Wasser befüllten Mischbehälter, Luft eingebracht. Die entstehenden Luftblasen bewirken je nach deren Größe und Menge Verwirbelungen und Turbulenzen des Wassers und der Zuschläge, was vor allem entlang der Innenseite des Gehäuses und am Rührwerk zu höheren Strömungsgeschwindigkeiten führt, wodurch Verunreinigungen "mitgerissen" werden. Zusätzlich kann das innere Rührwerk bei der Reinigung vorwärts und rückwärts laufen, was eine weitere Verbesserung der Reinigungswirkung mit sich bringt.To increase the cleaning efficiency, air is introduced into the mixing tank filled with water. The resulting air bubbles cause, depending on their size and amount turbulence and turbulence of the water and the aggregates, resulting in particular along the inside of the housing and the agitator to higher flow velocities, which impurities are "entrained". In addition, the internal agitator can run forward and backward during cleaning, resulting in a further improvement of the cleaning effect.

Des Weiteren kann die Lufteinspeisung aber auch erfolgen, wenn der Mischbehälter mit einem Mischmaterial befüllt ist. So ist es beispielsweise bei der Erzeugung von Leichtbeton möglich, beliebige Mengen an Luft in das zu vermischende Material einzubringen.Furthermore, the air feed can also take place when the mixing container is filled with a mixed material. For example, when producing lightweight concrete, it is possible to introduce any amount of air into the material to be mixed.

Gemäß einer bevorzugten Ausgestaltung ist die Welle als eine Hohlwelle ausgebildet, wobei die Lufteinspeisevorrichtung im Inneren der Hohlwelle vorgesehen ist. Dies hat den Vorteil, dass die Lufteinspeisevorrichtung neben den für das Mischen notwendigen Komponenten des Rührwerks keinen zusätzlichen Platz im Inneren des Mischbehälters beansprucht. Die Verbindung der Lufteinspeisevorrichtung nach außen kann bei dieser Ausgestaltung beispielsweise mittels einer Drehdurchführung verwirklicht werden.According to a preferred embodiment, the shaft is designed as a hollow shaft, wherein the Lufteinspeisevorrichtung is provided inside the hollow shaft. This has the advantage that the Lufteinspeisevorrichtung claimed in addition to the necessary for mixing components of the agitator no additional space in the interior of the mixing container. The connection of the Lufteinspeisevorrichtung outward can be realized in this embodiment, for example by means of a rotary feedthrough.

Wie dies bekannt ist, werden derartige Durchführungen allgemein für die Übertragung von Medien zwischen feststehenden und rotierenden Maschinenteilen eingesetzt.As is known, such bushings are generally used for the transfer of media between fixed and rotating machine parts.

Die Lufteinlässe sind vorzugsweise am unteren Ende der Welle vorgesehen. Sie können sich aber auch entlang der gesamten Höhe oder Teilbereichen der Welle erstrecken. Besonders vorteilhaft ist es, wenn den Lufteinlässen ein so genannter Ausströmerstein vorgeschaltet ist. Je nach Art und Beschaffenheit des Ausströmersteins kann die Luftblasengröße entsprechend variiert und so eine homogene Durchmischung erzielt werden.The air inlets are preferably provided at the lower end of the shaft. But they can also extend along the entire height or portions of the shaft. It is particularly advantageous if the air inlets a so-called Ausströmerstein is connected upstream. Depending on the nature and condition of the Ausströmersteins the bubble size can be varied accordingly and thus a homogeneous mixing can be achieved.

Es ist auch möglich, dass die Lufteinlässe ausschließlich oder zusätzlich entlang der Innenseite des Gehäusemantels angeordnet sind, um Luft von außen in den Mischbehälter einzuspeisen.It is also possible for the air inlets to be arranged exclusively or additionally along the inside of the housing jacket in order to feed air from outside into the mixing container.

Bei einer weiteren bevorzugten Ausführungsform weist die Lufteinspeisevorrichtung eine Steuereinrichtung auf, wobei der Luftdurchsatz, von einem Benutzer einstellbar ist. Auf diese Weise ist es für den Benutzer möglich, die Menge an einzubringender Luft je nach Art der Benutzung und/oder Art des verwendeten Mischmaterials einzustellen. Was die Steuereinrichtung betrifft, so kann diese in die Steuerung für den Mischbetrieb des Zwangsmischers integriert sein.In a further preferred embodiment, the air feed device has a control device, wherein the air flow rate is adjustable by a user. In this way, it is possible for the user to adjust the amount of air to be introduced depending on the type of use and / or type of mixed material used. As far as the control device is concerned, it can be integrated into the controller for the mixed operation of the forced mixer.

Gemäß einer weiteren Ausgestaltung ist die Steuerung so ausgebildet, dass die Lufteinspeisevorrichtung im Intervallbetrieb angesteuert wird. Dies bedeutet, dass sich die Lufteinspeisevorrichtung, wenn ein Ansteuerungsmodus für den Intervallbetrieb vom Benutzer ausgewählt wird, nach einem vordefinierten Zeitintervall jeweils ein- bzw. ausschaltet. Dieser Ansteuerungsmodus kann insbesondere bei der Optimierung des Reinigungs- bzw. Mischvorgangs von Vorteil sein.According to a further embodiment, the controller is designed so that the air feed device is driven in the interval mode. That is, when a drive mode for the interval operation is selected by the user, the air supply device turns on and off after a predetermined time interval, respectively. This activation mode can be particularly advantageous in optimizing the cleaning or mixing process.

Soll dem Mischmaterial keine zusätzliche Luft zugeführt werden, wird während des Mischvorgangs keine Luft eingedüst.If the mixing material no additional air to be supplied, no air is injected during the mixing process.

Die Luftzufuhr über die Luftzuleitung kann beispielsweise mittels einer elektrischen Luftpumpe erfolgen.The air supply via the air supply line can be done for example by means of an electric air pump.

Bei dem Zwangsmischer kann es sich beispielsweise um einen so genannten "Konusmischer" handeln, bei dem der Mischbehälter trichterförmig bzw. konusförmig ausgebildet ist. Der Zwangsmischer kann neben einem inneren Rührwerk, welches beispielsweise in Form einer Schnecke ausgebildet sein kann, ein weiteres Rührwerk umfassen, welches Mischscharen aufweist, die zu einer Rotationsbewegung entlang einer Innenwand des trichterförmigen Mischbehälters antreibbar sind. Das weitere oder äußere Rührwerk bewirkt eine zusätzliche Durchmischung des Mischmaterials, wodurch der Mischbehälter optimal ausgenutzt wird.The compulsory mixer can be, for example, a so-called "cone mixer", in which the mixing container is funnel-shaped or cone-shaped. The compulsory mixer may comprise, in addition to an internal stirrer, which may be in the form of a screw, for example, a further agitator having mixing blades which are drivable for rotational movement along an inner wall of the funnel-shaped mixing container. The additional or external agitator causes an additional mixing of the mixed material, whereby the mixing container is optimally utilized.

Die Erfindung betrifft ferner die Verwendung von Lufteinässen zur Einspeisung von Luft in einen solchen Zwangsmischer.The invention further relates to the use of air intakes for feeding air into such a forced mixer.

Weitere Merkmale und Vorteile der Erfindung werden nachstehend anhand eines Ausführungsbeispiels mit Bezug auf die beigefügte Zeichnung beschrieben. In der Zeichnung zeigt Fig. 1 eine Ausführungsform eines erfindungsgemäßen Zwangsmischers im Querschnitt.Further features and advantages of the invention will be described below with reference to an embodiment with reference to the accompanying drawings. In the drawing shows Fig. 1 an embodiment of a compulsory mixer according to the invention in cross section.

Der in Figur 1 gezeigte Zwangsmischer ist in seiner Gesamtheit mit dem Bezugszeichen 10 gekennzeichnet. Er umfasst einen Mischbehälter 1, der, wie in der Figur zu erkennen ist, zumindest in seinem unteren Teil mit einem konusförmig bzw. trichterförmig verlaufenden Gehäuse 1a ausgebildet ist. Die Form des Mischbehälters 1 ist jedoch im Rahmen der vorliegenden Erfindung nicht als beschränkend anzusehen.The in FIG. 1 shown compulsory mixer is indicated in its entirety by the reference numeral 10. It comprises a mixing container 1, which, as can be seen in the figure, is formed at least in its lower part with a conical or funnel-shaped housing 1a. The shape of the mixing container However, in the context of the present invention, FIG. 1 is not to be regarded as limiting.

In den Mischbehälter 1 wird das zu mischende Material eingebracht und mittels eines Rührwerks 2, 3 durchmischt. Das Rührwerk 2, 3 umfasst ein inneres Rührwerk 2, welches aus einer Welle 2a und daran angebrachten Mischflügeln 2b aufgebaut ist, wobei die Mischflügel 2b hier schneckenförmig an der Welle 2a angeordnet sind. Die Welle 2a erstreckt sich entlang einer Achse A des Mischbehälters 1, wobei die Achse A in der Figur durch eine gestrichelte Linie angedeutet ist.In the mixing container 1, the material to be mixed is introduced and mixed by means of a stirrer 2, 3. The agitator 2, 3 comprises an internal agitator 2, which is constructed from a shaft 2a and mixing blades 2b mounted thereon, wherein the mixing blades 2b are here arranged helically on the shaft 2a. The shaft 2a extends along an axis A of the mixing container 1, wherein the axis A is indicated in the figure by a dashed line.

Das äußere Rührwerk 3 umfasst eine Welle 3a, welche hier konzentrisch zu der Welle 2a angeordnet ist, mit daran angebrachten Mischarmen 3b, welche an ihren Enden mit Mischscharen 3c versehen sind. Im Betrieb streichen die Mischscharen 3c, wie hier gezeigt, entlang der Innenseite des Gehäuses 1a des Mischbehälters 1. Es ist anzumerken, dass das Vorhandensein des äußeren Rührwerks 3 im Zusammenhang mit der vorliegenden Erfindung nicht zwingend ist.The outer agitator 3 comprises a shaft 3a, which is here arranged concentrically to the shaft 2a, with mixing arms 3b attached thereto, which are provided at their ends with mixing blades 3c. In operation, the mixing blades 3c, as shown here, stroke along the inside of the housing 1a of the mixing container 1. It should be noted that the presence of the outer agitator 3 in the context of the present invention is not mandatory.

Neben den genannten Bestandteilen des Zwangsmischers 10 weist die erfindungsgemäße Ausführungsform Lufteinlässe 4b auf, die hier am unteren Ende der Welle 2a ausgebildet sind. Die Luftzuleitung 4a ist gemäß dieser Ausführungsform in das Innere der Welle 2a eingeführt, so dass sie keinen zusätzlichen Raum im Inneren des Mischbehälters 1 beansprucht. In einer besonders bevorzugten Ausführungsform sind zusätzliche Lufteinlässe in Form von Düsen am Gehäuse 1a vorgesehen.In addition to the constituents of the compulsory mixer 10, the embodiment according to the invention has air inlets 4b, which are formed here at the lower end of the shaft 2a. The air supply line 4 a is inserted into the interior of the shaft 2 a according to this embodiment, so that it does not claim any additional space in the interior of the mixing container 1. In a particularly preferred embodiment, additional air inlets are provided in the form of nozzles on the housing 1a.

Die Lufteinspeisevorrichtung 4 umfasst eine Luftzuleitung 4a sowie die mit der Luftzuleitung verbundenen Lufteinlässe 4b. Die Luftzuleitung 4a ist im Inneren der Welle 2a nach unten geführt.The air feed device 4 comprises an air feed line 4a and the air inlets 4b connected to the air feed line. The air supply line 4a is guided in the interior of the shaft 2a down.

Die Luftzuleitung 4a ist über eine Drehdurchführung 5 nach außen verbunden, wobei die Drehdurchführung 5 gleichzeitig das Innere der Welle 2a nach außen abdichtet. Die Luftzufuhr kann durch eine elektrische Luftpumpe (in der Figur nicht gezeigt) über die Luftzuleitung 4a erfolgen.The air supply line 4a is connected via a rotary feedthrough 5 to the outside, wherein the rotary feedthrough 5 simultaneously seals the interior of the shaft 2a to the outside. The air supply can be done by an electric air pump (not shown in the figure) via the air supply line 4a.

Auf diese Weise wird dem Reinigungswasser oder Mischmaterial Luft in Form von Luftblasen in gewünschter Menge zugeführt und der Zwangsmischer 10 kann zudem mit geringem Aufwand gereinigt, bzw. kann auf einfache Weise Leichtbeton hergestellt werden. Das Zuschalten der Lufteinspeisevorrichtung 4 kann dabei sowohl während des Mischvorgangs, wenn die Mischflügel 2b von der Welle 2a angetrieben eine Rotationsbewegung ausführen, als auch bei Stillstand des Zwangsmischers 10 erfolgen.In this way, the cleaning water or mixed material air is supplied in the form of air bubbles in the desired amount and the compulsory mixer 10 can also be cleaned with little effort, or can be easily manufactured lightweight concrete. The connection of the air feed device 4 can be carried out both during the mixing process, when the mixing blades 2 b driven by the shaft 2 a perform a rotational movement, as well as at standstill of the forced mixer 10.

Gemäß einer nicht dargestellten Alternative ist es auch möglich, die Lufteinspeisevorrichtung 4 außen an der Welle 2a anzubringen.According to an alternative, not shown, it is also possible to attach the Lufteinspeisevorrichtung 4 outside of the shaft 2a.

Claims (11)

Zwangsmischer (10) zum Mischen von Komponenten, aufweisend einen Mischbehälter (1), wobei entlang einer Achse A des Mischbehälters (1) ein Rührwerk (2) ausgebildet ist, welches eine Welle (2a) mit daran angebrachten Mischflügeln (2b) umfasst, dadurch gekennzeichnet, dass mindestens ein Lufteinlass (4b) an die Welle (2a) gekoppelt ist, der zur Lufteinspeisung in den Mischbehälter (1) ausgelegt ist.Compulsory mixer (10) for mixing components, comprising a mixing vessel (1), along an axis A of the mixing container (1), an agitator (2) is formed, which has a shaft (2a) having mounted thereon mixing blades (2b), characterized in that at least one air inlet (4b) is coupled to the shaft (2a) which is designed to feed air into the mixing container (1). Zwangsmischer (10) nach Anspruch 1, dadurch gekennzeichnet, dass mindestens ein Lufteinlass (4b) zusätzlich am Gehäusemantel (1a) vorgesehen ist.Compulsory mixer (10) according to claim 1, characterized in that at least one air inlet (4b) is additionally provided on the housing casing (1a). Zwangsmischer (10) zum Mischen von Komponenten, aufweisend einen Mischbehälter (1), wobei entlang einer Achse A des Mischbehälters (1) ein Rührwerk (2) ausgebildet ist, welches eine Welle (2a) mit daran angebrachten Mischflügeln (2b) umfasst, dadurch gekennzeichnet, dass mindestens ein Lufteinlass (4b) am Gehäusemantel (1a) vorgesehen ist, der zur Lufteinspeisung in den Mischbehälter (1) ausgelegt ist.Compulsory mixer (10) for mixing components, comprising a mixing vessel (1), along an axis A of the mixing container (1), an agitator (2) is formed, which has a shaft (2a) having mounted thereon mixing blades (2b), characterized in that at least one air inlet (4b) is provided on the housing jacket (1a), which is designed to feed air into the mixing container (1). Zwangsmischer (10) nach Anspruch 3, dadurch gekennzeichnet, dass mindestens ein Lufteinlass (4b) zusätzlich an die Welle (2a) gekoppelt ist.Compulsory mixer (10) according to claim 3, characterized in that at least one air inlet (4b) is additionally coupled to the shaft (2a). Zwangsmischer (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Rührwerk (2) in Form einer Schnecke ausgebildet ist.Compulsory mixer (10) according to one of the preceding claims, characterized in that the agitator (2) is designed in the form of a screw. Zwangsmischer (10) nach einem der Ansprüche 1, 2, 4 oder 5, dadurch gekennzeichnet, dass die Welle (2a) als eine Hohlwelle ausgebildet ist, wobei der mindestens eine Lufteinlass (4b) entlang der Hohlwelle (2a) vorgesehen ist.Compulsory mixer (10) according to any one of claims 1, 2, 4 or 5, characterized in that the shaft (2a) is formed as a hollow shaft, wherein the at least one air inlet (4b) along the hollow shaft (2a) is provided. Zwangsmischer (10) nach Anspruch 6, dadurch gekennzeichnet, dass im Inneren der Hohlwelle (2a) ein Ausströmerstein vorgesehen ist.Compulsory mixer (10) according to claim 6, characterized in that in the interior of the hollow shaft (2a) a Ausströmerstein is provided. Zwangsmischer (10) nach einem der Ansprüche 6 oder 7, dadurch gekennzeichnet, dass eine Luftzuleitung (4a) innerhalb der Hohlwelle (2a) vorgesehen ist.Compulsory mixer (10) according to any one of claims 6 or 7, characterized in that an air supply line (4a) within the hollow shaft (2a) is provided. Zwangsmischer (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Mischbehälter (1) trichterförmig ausgebildet ist und der Zwangsmischer ein zweites Rührwerk (3) umfasst, welches Mischscharen (3c) aufweist, die zu einer Rotationsbewegung entlang der Innenseite des Gehäusemantels (1a) des trichterförmigen Mischbehälters (1) antreibbar sind.Compulsory mixer (10) according to any one of the preceding claims, characterized in that the mixing vessel (1) is funnel-shaped and the compulsory mixer comprises a second agitator (3), which mixing shafts (3c), which to a rotational movement along the inside of the housing shell ( 1a) of the funnel-shaped mixing container (1) are drivable. Verwendung von mindestens einem Lufteinlass (4b) zum Einbringen von Luft in den Mischbehälter (1) eines Zwangsmischers (10) nach einem der Ansprüche 1 bis 7.Use of at least one air inlet (4b) for introducing air into the mixing tank (1) of a forced mixer (10) according to one of claims 1 to 7. Verwendung nach Anspruch 10, dadurch gekennzeichnet, dass die Welle (2a) als eine Hohlwelle ausgebildet ist und die Luftzufuhr in die Hohlwelle erfolgt.Use according to claim 10, characterized in that the shaft (2a) is formed as a hollow shaft and the air is supplied into the hollow shaft.
EP13189061.8A 2012-10-19 2013-10-17 Forced mixer with self-cleaning function and use of air inlets therefor Withdrawn EP2722103A3 (en)

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