EP2106882B1 - Controllable device and method for cleaning surfaces - Google Patents

Controllable device and method for cleaning surfaces Download PDF

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Publication number
EP2106882B1
EP2106882B1 EP08009040A EP08009040A EP2106882B1 EP 2106882 B1 EP2106882 B1 EP 2106882B1 EP 08009040 A EP08009040 A EP 08009040A EP 08009040 A EP08009040 A EP 08009040A EP 2106882 B1 EP2106882 B1 EP 2106882B1
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EP
European Patent Office
Prior art keywords
nozzle
jet pipe
carbon dioxide
feed
carrier gas
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EP08009040A
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German (de)
French (fr)
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EP2106882A1 (en
Inventor
Wolfgang Büst
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Linde GmbH
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Linde GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials

Definitions

  • the present invention relates to a device for cleaning surfaces comprising a first supply of liquid carbon dioxide, which is connectable to a nozzle, a second supply for a carrier gas, which opens into a nozzle body which connects the nozzle with a jet pipe, which also serves as a nozzle ,
  • a first narrowing in the flow direction in diameter and after a distance of constant diameter expanding nozzle is configured, wherein an impact body as built-in device in the nozzle body downstream of the inlet opening of the feed for carrier gas in the flowed through when using the device of carbon dioxide and carrier gas Area of the nozzle body is provided.
  • the present invention relates to a method for cleaning surfaces.
  • jet devices which are fed with liquid carbon dioxide and a carrier gas and have an expansion chamber, with the aid of dry snow or dry ice particles are generated, which then leave the jet device together with gaseous carbon dioxide and carrier gas as a dry ice jet be directed to the surface to be cleaned.
  • the expansion chamber is provided with one or more cross-sectional constrictions of a certain extent, wherein the constrictions, for example in the form of a directed with the tip or rounding upstream against the carbon dioxide flow cone, a hemisphere, ball, egg or rod shape is formed.
  • the constrictions for example in the form of a directed with the tip or rounding upstream against the carbon dioxide flow cone, a hemisphere, ball, egg or rod shape is formed.
  • Such internals may also protrude into the carrier gas stream or a chamber of the carrier gas stream.
  • the object of the present invention is to provide an improved apparatus and an improved method for cleaning surfaces.
  • the object is achieved on the device side, characterized in that the baffle body is designed in the form of a flattened ball which is rotatably mounted, and an adjusting device is provided, which causes a rotation of the baffle body.
  • the impact body serves as a control element.
  • the baffle body on two sides, running flattened opposite.
  • the passage cross-section is adjustable at this point and thus the flow adjustable.
  • the mixing of the supplied carrier gas with the liquid carbon dioxide is influenced and, for example, a more or less homogenized bundle jet is supplied to the jet pipe.
  • it can be used to adjust the pressure loss in the nozzle, for example.
  • the size of the perpendicular to the flow direction available baffle can be changed, which ultimately also the formation of the CO 2 snow particles (dry ice particles) can be influenced.
  • the hardness and size of the dry ice particles can be influenced.
  • CO 2 particle jet device is a CO 2 particle nozzle, which is also referred to as a two-component nozzle, in which via a feed for liquid carbon dioxide or for a mixture of liquid and gaseous carbon dioxide this can be supplied to an expansion nozzle.
  • the liquid carbon dioxide or the mixture of liquid and gaseous carbon dioxide is expanded through the expansion nozzle.
  • the resulting pressure reduction causes a partial conversion of the liquid carbon dioxide in CO 2 snow.
  • the CO 2 snow is entrained by the supplied via the supply line or during the expansion resulting gaseous carbon dioxide and an additionally supplied carrier gas and compressed downstream with suitable means.
  • suitable means for example, to understand a baffle.
  • the compressed CO 2 snow particles form, together with gaseous CO 2 and / or further carrier gas, the cleaning jet radiated by such a jet device, which is directed onto a surface to be cleaned.
  • the CO 2 particle jet thus contains dry ice particles, CO 2 cooling gas and carrier gas.
  • Such a jet can be used with particular advantage for cleaning surfaces, in particular surfaces of workpieces, but also for cooling surfaces and / or workpieces.
  • the carrier gas which may also be referred to as the complementary gas
  • air e.g. from compressor plants, nitrogen or carbon dioxide, both e.g. from bottles or bundles, in particular with adjustable back pressure, provided.
  • the device has a modular construction, in which the nozzle and / or the jet pipe are designed as interchangeable modules.
  • a modular design is particularly advantageous, since a structure of individual functional groups that complement each other, opens up possibilities of variation, with the help of quasi a control of individual elements of the beam characteristic of the device leaving the particle beam allows.
  • the nozzle is releasably secured and thereby exchangeable, wherein by replacing a first nozzle with a second nozzle having a different geometry from the first nozzle, in particular with deviating cross sections and / or length ratios, a second different from the first flow characteristic for the device is adjustable.
  • a second different from the first flow characteristic for the device is adjustable.
  • the supplied amount of liquid carbon dioxide is specified by the geometry of the nozzle.
  • the jet pipe is releasably secured and thereby replaceable, wherein by replacing a first jet pipe against a second jet pipe with a deviating from the first jet pipe geometry, in particular with different cross-sections and / or length ratios and / or sequence of constriction and widening the diameter, a second of the first different flow characteristics for the device is adjustable.
  • a second of the first different flow characteristics for the device is adjustable.
  • the flow per unit time, the flow velocity and the pressure drop at relaxation as elements of the flow characteristic or as a flow characteristic to be considered.
  • the shaping of the particle beam which can be designated, for example, as hard, soft, stronger or less strongly focused and as flat or three-dimensional, in particular circular in cross-section.
  • the shape of the jet pipe mouth determines the spray pattern, wherein For example, a large-area, less focused beam or a slender, highly focused beam can be generated by varying the geometry of the beam tube mouth.
  • a large-area jet preferably with a short distance to the jet pipe, is provided for large area, easily removable impurities and a slender jet preferably for punctual removal of stubborn impurities.
  • interfaces for replacing a module between the supply of liquid carbon dioxide and the nozzle body and / or between the nozzle body and the jet pipe are provided.
  • Such interfaces preferably have easy-to-use devices for quick connection of the individual modules.
  • connection option is designed as a connection fitting.
  • a double nipple is provided for connecting the feed for liquid carbon dioxide to the nozzle.
  • the use of a double nipple allows easy connection and disconnection of various connections.
  • the object is achieved in that during the cleaning process, the orientation of the baffle body is changed in the flow, whereby an influence on the properties of the apparatus for cleaning leaving and directed to the surface to be cleaned beam is made possible, an adaptation of the properties allows the beam to the cleaning task.
  • the relationship of degree of soiling and required for cleaning beam intensity, hardness, - focusing (degree of focus) and the preferred particle size can be considered and it can be optimally adapted to the cleaning task.
  • At least two tests with respectively mutually different settings of the impact body for determining the optimum setting of the impending cleaning task are preferably preparatory Impact body performed.
  • a sample area is subjected to a particle beam as a test test.
  • the cleaning result achieved is assessed. If the cleaning result is not satisfactory, the baffle is adjusted and carried out a new test attempt.
  • the settings of the impact body are documented to then take over the setting that has led to the best cleaning result for the upcoming cleaning task.
  • the object is achieved by the method in that a device according to one of claims 1 to 7 is used.
  • the invention offers a whole series of advantages, of which again the possibility of expanding the range of use and the possibility of optimizing the use for certain cleaning tasks should be mentioned here.
  • FIG. 1 a double nipple 5, to the left of the supply of liquid carbon dioxide is connected, a nozzle 2 and a nozzle body 1.
  • the supply for a carrier gas 6 opens into the nozzle body 1, which connects the nozzle 2 with a jet pipe 3, which is also formed as a nozzle is, wherein a first narrowing in the flow direction in diameter and expanding after a distance of constant diameter jet pipe 3 in the FIG. 1 is shown.
  • An impact body 4 is provided as a built-in in the nozzle body 1 downstream of the inlet opening of the feed for carrier gas 6 in the flowed through when using the device of CO 2 and carrier gas 6 region of the nozzle body 1, which may also be referred to as a mixing chamber.
  • the baffle body 4 Due to the shape of the impact body 4 as a flattened ball, which is rotatably mounted, and an adjusting device 7, which causes a rotation of the baffle body, the baffle body 4 is capable of as a control element to serve.
  • the baffle 4 is here formed on two sides, flattened opposite.
  • FIG. 2 shows a plan view of a section of the representation of FIG. 1 in which the adjusting device 7 can be seen for rotating the impact body 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Cleaning In General (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning Or Drying Semiconductors (AREA)

Abstract

The device has an inlet for liquid carbon dioxide connected to a nozzle (2) using a double nipple (5). Another inlet (6) for carrier gas i.e. air, connects the nozzle with a jet pipe (3). An impact body (4) is attached in a nozzle body (1) downstream to an opening of the inlet (6). The impact body is formed as a flattened ball and is rotatably supported, and an adjusting device rotates the impact body. Cut surfaces interchange a module between the inlet for liquid carbon dioxide and the nozzle body, and between the nozzle body and the jet pipe. An independent claim is also included for a method for cleaning a surface.

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zur Reinigung von Oberflächen aufweisend eine erste Zuführung für flüssiges Kohlendioxid, die an eine Düse anschließbar ist, eine zweite Zuführung für ein Trägergas, die in einen Düsenkörper mündet, der die Düse mit einem Strahlrohr verbindet, das ebenfalls als Düse, insbesondere als eine sich zunächst in Strömungsrichtung im Durchmesser verengende und sich nach einer Strecke von konstantem Durchmesser aufweitende Düse, ausgestaltet ist, wobei ein Prallkörper als Einbaute im Düsenkörper stromabwärts der Eintrittsöffnung der Zuführung für Trägergas in den bei Verwendung der Vorrichtung von Kohlendioxid und Trägergas durchströmten Bereich des Düsenkörpers vorgesehen ist. Des Weiteren betrifft die vorliegende Erfindung ein Verfahren zur Reinigung von Oberflächen.The present invention relates to a device for cleaning surfaces comprising a first supply of liquid carbon dioxide, which is connectable to a nozzle, a second supply for a carrier gas, which opens into a nozzle body which connects the nozzle with a jet pipe, which also serves as a nozzle , In particular, as a first narrowing in the flow direction in diameter and after a distance of constant diameter expanding nozzle, is configured, wherein an impact body as built-in device in the nozzle body downstream of the inlet opening of the feed for carrier gas in the flowed through when using the device of carbon dioxide and carrier gas Area of the nozzle body is provided. Furthermore, the present invention relates to a method for cleaning surfaces.

Zur Reinigung von Oberflächen ist es bekannt, Strahlvorrichtungen einzusetzen, die mit flüssigem Kohlendioxid und einem Trägergas gespeist werden und eine Expansionskammer aufweisen, mit deren Hilfe Trockenschnee- bzw. Trockeneispartikel erzeugt werden, die dann zusammen mit gasförmigem Kohlendioxid und Trägergas als Trockeneisstrahl die Strahlvorrichtung verlassen und auf die zu reinigende Oberfläche gerichtet werden.For cleaning surfaces, it is known to use jet devices, which are fed with liquid carbon dioxide and a carrier gas and have an expansion chamber, with the aid of dry snow or dry ice particles are generated, which then leave the jet device together with gaseous carbon dioxide and carrier gas as a dry ice jet be directed to the surface to be cleaned.

Aus der Offenlegungsschrift DE 10 2004 051 005 A1 ist eine Strahlvorrichtung mit speziellen Ausbildungen der Expansionskammer zur Erhöhung von Größe und Härte der erzeugten Trockeneispartikel bekannt. Dazu ist die Expansionskammer mit einer oder mehreren Querschnittsverengungen eines bestimmten Ausmaßes versehen, wobei die Verengungen z.B. in Form eines mit der Spitze oder Rundung stromaufwärts gegen den Kohlendioxidstrom gerichteten Kegels, einer Halbkugel, Kugel, Ei- oder Stabform ausgebildet ist. Derartige Einbauten können dabei auch in den Trägergasstrom oder eine Kammer des Trägergassstroms einragen.From the publication DE 10 2004 051 005 A1 For example, there is known a blasting apparatus with special expansion chamber designs for increasing the size and hardness of the dry ice particles produced. For this purpose, the expansion chamber is provided with one or more cross-sectional constrictions of a certain extent, wherein the constrictions, for example in the form of a directed with the tip or rounding upstream against the carbon dioxide flow cone, a hemisphere, ball, egg or rod shape is formed. Such internals may also protrude into the carrier gas stream or a chamber of the carrier gas stream.

Aufgabe der vorliegenden Erfindung ist es, eine verbesserte Vorrichtung und ein verbessertes Verfahren zur Reinigung von Oberflächen zur Verfügung zu stellen. Die gestellte Aufgabe wird vorrichtungsseitig dadurch gelöst, dass der Prallkörper in Form einer abgeflachten Kugel ausgeführt ist, die drehbar gelagert ist, und eine Verstelleinrichtung vorgesehen ist, die ein Drehen des Prallkörpers bewirkt. Hierbei dient also der Prallkörper als Regelorgan. Beispielsweise ist der Prallkörper zweiseitig, gegenüberliegend abgeflacht ausgeführt. Mit Hilfe eines solchen verstellbaren Prallkörpers ist der Durchgangsquerschnitt an dieser Stelle einstellbar und somit der Durchfluss regelbar. Dadurch wird die Vermischung des zugeführten Trägergases mit dem flüssigen Kohlendioxid beeinflusst und beispielsweise ein mehr oder minder homogenisierter Bündelstrahl dem Strahlrohr zugeführt. Letztlich kann damit z.B. der Druckverlust in der Düse eingestellt werden.The object of the present invention is to provide an improved apparatus and an improved method for cleaning surfaces. The object is achieved on the device side, characterized in that the baffle body is designed in the form of a flattened ball which is rotatably mounted, and an adjusting device is provided, which causes a rotation of the baffle body. Here, therefore, the impact body serves as a control element. For example, the baffle body on two sides, running flattened opposite. With the help of such an adjustable impact body, the passage cross-section is adjustable at this point and thus the flow adjustable. As a result, the mixing of the supplied carrier gas with the liquid carbon dioxide is influenced and, for example, a more or less homogenized bundle jet is supplied to the jet pipe. Ultimately, it can be used to adjust the pressure loss in the nozzle, for example.

Darüberhinaus ist z.B. die Größe der senkrecht zur Strömungsrichtung zur Verfügung stehenden Prallfläche veränderbar, wodurch letztlich auch die Bildung der CO2-Schnee-Partikel (Trockeneispartikel) beeinflusst werden kann. Beispielsweise kann auf die Härte und Größe der Trockeneispartikel Einfluss genommen werden.In addition, for example, the size of the perpendicular to the flow direction available baffle can be changed, which ultimately also the formation of the CO 2 snow particles (dry ice particles) can be influenced. For example, the hardness and size of the dry ice particles can be influenced.

Zum besseren Verständnis soll hier das allgemeine Prinzip einer CO2-Partikel-Strahlvorrichtung, näher erläutert werden. In der Regel handelt es sich um eine CO2-Partikel-Düse, die auch als Zweistoff-Düse bezeichnet wird, bei der über eine Zuführung für flüssiges Kohlendioxid oder für ein Gemisch aus flüssigem und gasförmigem Kohlendioxid dieses einer Expansionsdüse zugeführt werden kann. Das flüssige Kohlendioxid oder das Gemisch aus flüssigem und gasförmigem Kohlendioxid wird über die Expansionsdüse entspannt. Die dabei auftretende Druckminderung verursacht eine teilweise Umwandlung des flüssigen Kohlendioxids in CO2-Schnee. Der CO2-Schnee wird von dem über die Zuleitung zugeführten bzw. bei der Entspannung entstehenden gasförmigen Kohlendioxid und von einem zusätzlich zugespeisten Trägergas mitgerissen und stromabwärts mit geeigneten Mitteln verdichtet. Als geeignetes Mittel ist beispielsweise eine Prallfläche zu verstehen. Die verdichteten CO2-Schnee-Partikel bilden zusammen mit gasförmigem CO2 und/oder weiterem Trägergas den von einer solchen Strahlvorrichtung abgestrahlten Reinigungsstrahl, der auf eine zu reinigende Oberfläche gerichtet wird. Der CO2-Partikelstrahl enthält somit Trockeneispartikel, CO2-Kaltgas und Trägergas. Ein solcher Strahl kann mit besonderem Vorteil zur Reinigung von Oberflächen, insbesondere Oberflächen von Werkstücken, aber auch zur Kühlung von Oberflächen und/oder Werkstücken eingesetzt werden.For a better understanding, the general principle of a CO 2 particle jet device will be explained in more detail. In general, it is a CO 2 particle nozzle, which is also referred to as a two-component nozzle, in which via a feed for liquid carbon dioxide or for a mixture of liquid and gaseous carbon dioxide this can be supplied to an expansion nozzle. The liquid carbon dioxide or the mixture of liquid and gaseous carbon dioxide is expanded through the expansion nozzle. The resulting pressure reduction causes a partial conversion of the liquid carbon dioxide in CO 2 snow. The CO 2 snow is entrained by the supplied via the supply line or during the expansion resulting gaseous carbon dioxide and an additionally supplied carrier gas and compressed downstream with suitable means. As a suitable means, for example, to understand a baffle. The compressed CO 2 snow particles form, together with gaseous CO 2 and / or further carrier gas, the cleaning jet radiated by such a jet device, which is directed onto a surface to be cleaned. The CO 2 particle jet thus contains dry ice particles, CO 2 cooling gas and carrier gas. Such a jet can be used with particular advantage for cleaning surfaces, in particular surfaces of workpieces, but also for cooling surfaces and / or workpieces.

Als Trägergas, das auch als Komplementärgas bezeichnet werden kann, ist bevorzugt Luft, z.B. aus Kompressoranlagen, Stickstoff oder Kohlendioxid, beides z.B. aus Flaschen oder Bündel, insbesondere mit einstellbarem Hinterdruck, vorgesehen.As the carrier gas, which may also be referred to as the complementary gas, air, e.g. from compressor plants, nitrogen or carbon dioxide, both e.g. from bottles or bundles, in particular with adjustable back pressure, provided.

Bevorzugt weist die Vorrichtung einen modularen Aufbau auf, bei dem die Düse und/oder das Strahlrohr als auswechselbare Module ausgebildet sind. Ein modularer Aufbau ist besonders vorteilhaft, da ein Aufbau aus einzelnen Funktionsgruppen, die sich gegenseitig ergänzen, Variationsmöglichkeiten eröffnet, mit deren Hilfe quasi eine Regelung einzelner Elemente der Strahlcharakteristik des die Vorrichtung verlassenden Partikelstrahls ermöglicht.Preferably, the device has a modular construction, in which the nozzle and / or the jet pipe are designed as interchangeable modules. A modular design is particularly advantageous, since a structure of individual functional groups that complement each other, opens up possibilities of variation, with the help of quasi a control of individual elements of the beam characteristic of the device leaving the particle beam allows.

Besonders bevorzugt ist die Düse lösbar befestigt und dadurch auswechselbar, wobei durch ein Auswechseln einer ersten Düse gegen eine zweite Düse mit einer von der ersten Düse abweichenden Geometrie, insbesondere mit abweichenden Querschnitten und/oder Längenverhältnissen, eine zweite von der ersten verschiedene Strömungscharakteristik für die Vorrichtung einstellbar ist. Dabei sind hier z.B. der Durchfluss pro Zeiteinheit, die Strömungsgeschwindigkeit sowie der Druckabfall bei Entspannung als Elemente der Strömungscharakteristik bzw. als Strömungscharakteristik zu betrachten. Insbesondere wird durch die Geometrie der Düse die zugeführte Menge an flüssigem Kohlendioxid vorgegeben.Particularly preferably, the nozzle is releasably secured and thereby exchangeable, wherein by replacing a first nozzle with a second nozzle having a different geometry from the first nozzle, in particular with deviating cross sections and / or length ratios, a second different from the first flow characteristic for the device is adjustable. In this case, e.g. the flow per unit time, the flow velocity and the pressure drop at relaxation as elements of the flow characteristic or to consider as a flow characteristic. In particular, the supplied amount of liquid carbon dioxide is specified by the geometry of the nozzle.

Gemäß einer besonders vorteilhaften Ausgestaltung der Erfindung ist das Strahlrohr lösbar befestigt und dadurch auswechselbar, wobei durch ein Auswechseln eines ersten Strahlrohres gegen ein zweites Strahlrohr mit einer von dem ersten Strahlrohr abweichenden Geometrie, insbesondere mit abweichenden Querschnitten und/oder Längenverhältnissen und/oder Abfolge von Verengung und Aufweitung des Durchmessers, eine zweite von der ersten verschiedene Strömungscharakteristik für die Vorrichtung einstellbar ist. Hier sind ebenfalls z.B. der Durchfluss pro Zeiteinheit, die Strömungsgeschwindigkeit sowie der Druckabfall bei Entspannung als Elemente der Strömungscharakteristik bzw. als Strömungscharakteristik zu betrachten. Dabei wird hier besondere Aufmerksamkeit auf die Formung des Partikelstrahls gelegt, der z.B. als hart, weich, stärker oder weniger stark fokussiert sowie als flächig oder dreidimensional, insbesondere kreisförmig im Querschnitt, bezeichnet werden kann. Insbesondere bestimmt die Ausformung des Strahlrohrmundes das Strahlbild, wobei z.B. ein großflächiger, wenig fokussierter Strahl oder ein schlanker, stark fokussierter Strahl durch Variation der Geometrie des Strahlrohrmundes erzeugt werden kann. Dabei ist ein großflächiger Strahl, bevorzugt mit kurzem Abstand zum Strahlrohr, für großflächige, leicht abtragbare Verunreinigungen und eine schlanker Strahl bevorzugt zur punktuellen Abtragung hartnäckiger Verunreinigungen vorgesehen.According to a particularly advantageous embodiment of the invention, the jet pipe is releasably secured and thereby replaceable, wherein by replacing a first jet pipe against a second jet pipe with a deviating from the first jet pipe geometry, in particular with different cross-sections and / or length ratios and / or sequence of constriction and widening the diameter, a second of the first different flow characteristics for the device is adjustable. Here, too, for example, the flow per unit time, the flow velocity and the pressure drop at relaxation as elements of the flow characteristic or as a flow characteristic to be considered. In this case, particular attention is paid to the shaping of the particle beam, which can be designated, for example, as hard, soft, stronger or less strongly focused and as flat or three-dimensional, in particular circular in cross-section. In particular, the shape of the jet pipe mouth determines the spray pattern, wherein For example, a large-area, less focused beam or a slender, highly focused beam can be generated by varying the geometry of the beam tube mouth. In this case, a large-area jet, preferably with a short distance to the jet pipe, is provided for large area, easily removable impurities and a slender jet preferably for punctual removal of stubborn impurities.

Zweckmäßigerweise sind bei dem modularen Aufbau der Vorrichtung Schnittstellen zum Auswechseln eines Moduls zwischen der Zuführung für flüssiges Kohlendioxid und dem Düsenkörper und/oder zwischen dem Düsenkörper und dem Strahlrohr vorgesehen. Derartige Schnittstellen verfügen bevorzugt über einfach zu bedienende Vorrichtungen zur Schnellverbindung der einzelnen Module.Conveniently, in the modular structure of the device interfaces for replacing a module between the supply of liquid carbon dioxide and the nozzle body and / or between the nozzle body and the jet pipe are provided. Such interfaces preferably have easy-to-use devices for quick connection of the individual modules.

Mit besonderem Vorteil ist für die Düse eine metallisch dichtende Anschlussmöglichkeit an den Düsenkörper vorgesehen. Bevorzugt ist eine solche Anschlussmöglichkeit als Anschlussverschraubung ausgebildet.With particular advantage, a metallically sealing connection possibility to the nozzle body is provided for the nozzle. Preferably, such a connection option is designed as a connection fitting.

Gemäß einer zweckmäßigen Weiterbildung der Erfindung ist ein Doppelnippel zum Anschluss der Zuführung für flüssiges Kohlendioxid an die Düse vorgesehen. Der Einsatz eines Doppelnippels ermöglicht ein einfaches An- und Abkoppeln verschiedener Anschlüsse.According to an expedient development of the invention, a double nipple is provided for connecting the feed for liquid carbon dioxide to the nozzle. The use of a double nipple allows easy connection and disconnection of various connections.

Verfahrensseitig wird die gestellte Aufgabe dadurch gelöst, dass während des Reinigungsvorganges die Ausrichtung des Prallkörpers in der Strömung verändert wird, wodurch eine Einflussnahme auf die Eigenschaften eines die Vorrichtung zum Reinigen verlassenden und auf die zu reinigende Oberfläche gerichteten Strahls ermöglicht wird, die eine Anpassung der Eigenschaften des Strahls an die Reinigungsaufgabe ermöglicht. Dabei kann vorteilhaft der Zusammenhang von Verschmutzungsgrad und zur Reinigung erforderlicher Strahlintensität, -härte, - fokussierung (Grad der Fokussierung) sowie die bevorzugte Partikelgröße berücksichtigt werden und es können die genannten Eigenschaften auf die Reinigungsaufgabe optimal abgestimmt werden.The method, the object is achieved in that during the cleaning process, the orientation of the baffle body is changed in the flow, whereby an influence on the properties of the apparatus for cleaning leaving and directed to the surface to be cleaned beam is made possible, an adaptation of the properties allows the beam to the cleaning task. In this case, the relationship of degree of soiling and required for cleaning beam intensity, hardness, - focusing (degree of focus) and the preferred particle size can be considered and it can be optimally adapted to the cleaning task.

Bevorzugt werden vor dem eigentlichen Reinigungsvorgang vorbereitend mindestens zwei Versuche mit jeweils voneinander verschiedenen Einstellungen des Prallkörpers zur Ermittlung der für die bevorstehende Reinigungsaufgabe optimalen Einstellung des Prallkörpers durchgeführt. Dabei wird z.B. ein Probebereich mit einem Partikelstrahl als Testversuch beaufschlagt. Das erzielte Reinigungsergebnis wird beurteilt. Wenn das Reinigungsergebnis nicht zufriedenstellend ist, wird der Prallkörper verstellt und ein erneuter Testversuch durchgeführt. Die Einstellungen des Prallkörpers werden dokumentiert, um dann die Einstellung, die zum besten Reinigungsergebnis geführt hat, für die bevorstehende Reinigungsaufgabe zu übernehmen.Before the actual cleaning process, at least two tests with respectively mutually different settings of the impact body for determining the optimum setting of the impending cleaning task are preferably preparatory Impact body performed. In this case, for example, a sample area is subjected to a particle beam as a test test. The cleaning result achieved is assessed. If the cleaning result is not satisfactory, the baffle is adjusted and carried out a new test attempt. The settings of the impact body are documented to then take over the setting that has led to the best cleaning result for the upcoming cleaning task.

Desweiteren wird die gestellte Aufgabe verfahrensseitig dadurch gelöst, dass eine Vorrichtung nach einem der Ansprüche 1 bis 7 eingesetzt wird.Furthermore, the object is achieved by the method in that a device according to one of claims 1 to 7 is used.

Die Erfindung bietet eine ganze Reihe von Vorteilen, von denen hier nochmal die Möglichkeit der Erweiterung des Einsatzspektrums und die Möglichkeit, den Einsatz für bestimmte Reinigungsaufgaben zu optimieren, genannt werden sollen.The invention offers a whole series of advantages, of which again the possibility of expanding the range of use and the possibility of optimizing the use for certain cleaning tasks should be mentioned here.

Die Erfindung sowie weitere Ausgestaltungen der Erfindung werden im Folgenden anhand der in den Figuren dargestellten Ausführungsbeispiele näher erläutert. Die Figuren zeigen:

Figur 1
eine erfindungsgemäße Vorrichtung mit einem Prallkörper in Stellung 1,
Figur
eine Draufsicht auf einen Ausschnitt der Darstellung der Figur 1 (Ansicht A im Maßstab 2:1).
The invention and further embodiments of the invention are explained in more detail below with reference to the exemplary embodiments illustrated in the figures. The figures show:
FIG. 1
a device according to the invention with an impact body in position 1,
figure
a plan view of a section of the representation of FIG. 1 (View A in 2: 1 scale).

Im Einzelnen zeigt die Figur 1 einen Doppelnippel 5, an den links die Zuführung für flüssiges Kohlendioxid anschließbar ist, eine Düse 2 und einen Düsenkörper 1. Die Zuführung für ein Trägergas 6 mündet in den Düsenkörper 1, der die Düse 2 mit einem Strahlrohr 3 verbindet, das ebenfalls als Düse ausgebildet ist, wobei eine sich zunächst in Strömungsrichtung im Durchmesser verengendes und sich nach einer Strecke von konstantem Durchmesser aufweitendes Strahlrohr 3 in der Figur 1 dargestellt ist. Ein Prallkörper 4 ist als Einbaute im Düsenkörper 1 stromabwärts der Eintrittsöffnung der Zuführung für Trägergas 6 in den bei Verwendung der Vorrichtung von CO2 und Trägergas 6 durchströmten Bereich des Düsenkörpers 1, der auch als Mischkammer bezeichnet werden kann, vorgesehen. Durch die Ausformung des Prallkörpers 4 als abgeflachte Kugel, die drehbar gelagert ist, und eine Verstelleinrichtung 7 aufweist, die ein Drehen des Prallkörpers bewirkt, ist der Prallkörper 4 in der Lage als Regelorgan zu dienen. Der Prallkörper 4 ist hier zweiseitig, gegenüberliegend abgeflacht ausgebildet.In detail, the shows FIG. 1 a double nipple 5, to the left of the supply of liquid carbon dioxide is connected, a nozzle 2 and a nozzle body 1. The supply for a carrier gas 6 opens into the nozzle body 1, which connects the nozzle 2 with a jet pipe 3, which is also formed as a nozzle is, wherein a first narrowing in the flow direction in diameter and expanding after a distance of constant diameter jet pipe 3 in the FIG. 1 is shown. An impact body 4 is provided as a built-in in the nozzle body 1 downstream of the inlet opening of the feed for carrier gas 6 in the flowed through when using the device of CO 2 and carrier gas 6 region of the nozzle body 1, which may also be referred to as a mixing chamber. Due to the shape of the impact body 4 as a flattened ball, which is rotatably mounted, and an adjusting device 7, which causes a rotation of the baffle body, the baffle body 4 is capable of as a control element to serve. The baffle 4 is here formed on two sides, flattened opposite.

Die Figur 2 zeigt eine Draufsicht auf einen Ausschnitt der Darstellung der Figur 1, in der die Verstelleinrichtung 7 zum Drehen des Prallkörpers 4 zu erkennen ist.The FIG. 2 shows a plan view of a section of the representation of FIG. 1 in which the adjusting device 7 can be seen for rotating the impact body 4.

Claims (10)

  1. Device for cleaning surfaces, having a first feed for liquid carbon dioxide, which can be connected to a nozzle (2), a second feed for a carrier gas (6), which opens out into a nozzle body (1), which connects the nozzle (2) to a jet pipe (3), which is likewise designed as a nozzle, in particular as a nozzle first narrowing in diameter in the direction of flow and then widening after a section of constant diameter, an impact body (4) being provided as an internal component in the nozzle body (1) downstream from the inlet opening of the feed for carrier gas (6) into the region of the nozzle body (1) through which carbon dioxide and carrier gas flow when the device is in use, characterized in that the impact body (4) is configured in the form of a flattened ball which is rotatably mounted, and an adjusting device (7) which brings about turning of the impact body is provided.
  2. Device according to Claim 1, characterized in that the device has a modular construction, in which the nozzle (2) and/or the jet pipe (3) are formed as exchangeable modules.
  3. Device according to Claim 1, characterized in that the nozzle (2) is detachably fastened and therefore exchangeable, the exchange of a first nozzle (2) for a second nozzle with a geometry deviating from the first nozzle (2), in particular with deviating cross sections and/or relative lengths, allowing the setting of a second flow characteristic for the device, differing from the first characteristic.
  4. Device according to Claim 1 or 2, characterized in that the jet pipe (3) is detachably fastened and therefore exchangeable, the exchange of a first jet pipe (3) for a second jet pipe with a geometry deviating from the first jet pipe (3), in particular with deviating cross sections and/or relative lengths and/or sequence of narrowing and widening of the diameter, allowing the setting of a second flow characteristic for the device, differing from the first characteristic.
  5. Device according to one of Claims 2 to 4, characterized in that, in the modular construction of the device, interfaces for exchanging a module are provided between the feed for liquid carbon dioxide and the nozzle body (1) and/or between the nozzle body (1) and the jet pipe (3).
  6. Device according to one of Claims 2 to 5, characterized in that a means for the metallically sealing connection of the nozzle (2) to the nozzle body (1) is provided.
  7. Device according to one of Claims 1 to 6, characterized in that a double nipple (5) is provided for the connection of the feed for liquid carbon dioxide to the nozzle.
  8. Method for cleaning surfaces in which liquid carbon dioxide is fed by way of a first feed to a nozzle (2) and a carrier gas (6) is fed by way of a second feed to a nozzle body (1), which connects the nozzle (2) to a jet pipe (3), which is likewise designed as a nozzle, in particular as a nozzle first narrowing in diameter in the direction of flow and then widening after a section of constant diameter, the flow passing an impact body (4) as an internal component in the nozzle body (1) downstream from the inlet opening of the feed for carrier gas (6), that is to say in the region of the nozzle body (1) through which carbon dioxide and carrier gas flow, characterized in that, during the cleaning operation, the alignment of the impact body in the flow is changed, thereby making it possible to influence the properties of a jet leaving the device for cleaning and directed at the surface to be cleaned, and allowing the properties of the jet to be adapted to the cleaning task.
  9. Method according to Claim 8, characterized in that, before the actual cleaning operation, in preparation, at least two trials are carried out with settings of the impact body (4) that are in each case different from one another to determine the setting of the impact body (4) that is optimum for the forthcoming cleaning task.
  10. Method for cleaning surfaces, characterized in that a device according to one of Claims 1 to 7 is used.
EP08009040A 2008-04-04 2008-05-15 Controllable device and method for cleaning surfaces Not-in-force EP2106882B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008017340 2008-04-04

Publications (2)

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EP2106882A1 EP2106882A1 (en) 2009-10-07
EP2106882B1 true EP2106882B1 (en) 2010-11-03

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Application Number Title Priority Date Filing Date
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EP (1) EP2106882B1 (en)
AT (1) ATE486693T1 (en)
DE (3) DE102008018933A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102841182A (en) * 2012-09-24 2012-12-26 重庆大学 Tester for cleaning dry ice
CN112191376A (en) * 2020-08-19 2021-01-08 厦门理工学院 Solid CO2 cleaning nozzle structure

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102580940A (en) * 2012-02-15 2012-07-18 上海鸣华化工科技有限公司 Uniformly and stably jetted liquid carbon dioxide cleaning spray gun
CN102527660A (en) * 2012-02-15 2012-07-04 上海鸣华化工科技有限公司 Cleaning method using uniformly and stably jet cleaning agent formed by separately using liquid carbon dioxide or mixing liquid carbon dioxide and compressed gas
CN104118730B (en) * 2014-07-24 2016-08-24 唐学功 A kind of pneumatic material carrier
CN104801444B (en) * 2015-04-29 2017-06-27 中国石油天然气集团公司 A kind of independent increment fluid jet nozzle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29622088U1 (en) * 1996-12-19 1998-04-16 Kipp Jens Werner Blasting device
MXPA05003096A (en) * 2002-09-20 2005-11-17 Wener Kipp Jens Method and device for jet cleaning.
DE102004051005A1 (en) 2004-07-13 2006-02-02 Jens Werner Kipp Jet device for effective conversion of liquid carbon dioxide to dry snow or dry ice particles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102841182A (en) * 2012-09-24 2012-12-26 重庆大学 Tester for cleaning dry ice
CN102841182B (en) * 2012-09-24 2014-12-10 重庆大学 Tester for cleaning dry ice
CN112191376A (en) * 2020-08-19 2021-01-08 厦门理工学院 Solid CO2 cleaning nozzle structure

Also Published As

Publication number Publication date
ATE486693T1 (en) 2010-11-15
EP2106882A1 (en) 2009-10-07
DE102008018934A1 (en) 2009-10-08
DE502008001706D1 (en) 2010-12-16
DE102008018933A1 (en) 2009-10-08

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