EP0861690A2 - Ejection nozzle for hot water / steam - Google Patents

Ejection nozzle for hot water / steam Download PDF

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Publication number
EP0861690A2
EP0861690A2 EP97121779A EP97121779A EP0861690A2 EP 0861690 A2 EP0861690 A2 EP 0861690A2 EP 97121779 A EP97121779 A EP 97121779A EP 97121779 A EP97121779 A EP 97121779A EP 0861690 A2 EP0861690 A2 EP 0861690A2
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EP
European Patent Office
Prior art keywords
funnel
jet nozzle
outlet
width
chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97121779A
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German (de)
French (fr)
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EP0861690A3 (en
Inventor
Hermann Schick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Hartmann-Kulba Bauchemie & Co KG GmbH
Original Assignee
Dr Hartmann-Kulba Bauchemie & Co KG GmbH
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Publication of EP0861690A2 publication Critical patent/EP0861690A2/en
Publication of EP0861690A3 publication Critical patent/EP0861690A3/en
Withdrawn legal-status Critical Current

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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
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • B05B1/042—Outlets having two planes of symmetry perpendicular to each other, one of them defining the plane of the jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
    • B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
    • B44D3/16—Implements or apparatus for removing dry paint from surfaces, e.g. by scraping, by burning

Definitions

  • the invention relates to a jet nozzle for use in devices for Removal of particularly coatings on surfaces by means of hot and pressurized water with a rotationally symmetrical chamber that a has axial inlet and an axial outlet for the hot water.
  • Such jet nozzles operated with hot water or hot steam are generally known, they are used for cleaning surfaces, for example Masonry, metal surfaces etc. used and especially if the Dirt on such surfaces can be removed more easily by the influence of heat are.
  • a jet nozzle of the type mentioned in that the axial outlet is closed off by means of a disk which closes the latter and has a funnel-shaped opening in the center thereof, the funnel of which widens towards the chamber, the funnel having a rectangular cross section has, whose width B is at least twice as large as the height H.
  • the design of the outlet of the jet nozzle as a rectangular opening, the width of which is substantially greater than its height, ensures that the hot water jet emerging from this opening has a corresponding configuration, that is to say it has only a small height for a certain width.
  • the hot water jet Due to this configuration of the hot water jet, it can be directed against the coating to be removed from the surface to be cleaned in the manner of a spatula, and this flat hot water jet works in such a way that it penetrates between the top of the surface to be cleaned on the one hand and the underside of the coating to be lifted off on the other, and thereby its high temperature heats the coating and makes it elastic so that it is lifted off the surface.
  • This cross-sectional size of the outlet area best ensures that the flat water jet emerging from the jet nozzle does not convert its aqueous aggregate state into a vaporous aggregate state immediately after leaving the jet nozzle.
  • the watery state of the cleaning jet is maintained for a length of up to 10 cm before it changes into the vaporous state.
  • the broad funnel surfaces are each inclined at an angle ⁇ with respect to the longitudinal axis of the jet nozzle running centrally through the outlet opening, and the narrow funnel surfaces are each inclined at an angle ⁇ with respect to the longitudinal axis, ⁇ preferably 15 ° and ⁇ preferably 80 ° is.
  • This configuration of the inclinations of the funnel surfaces to one another most advantageously ensures the formation of a cleaning jet which is as flat as possible but wide and emerges from the outlet region of the outlet opening.
  • the width B of the funnel on the side of the disk facing the chamber advantageously corresponds to the diameter D K of the chamber. This means that the corners of the opening of the funnel border on the cylindrical inner wall of the chamber.
  • the disc Due to the relatively flat design of the funnel and the width of the funnel limited by the preselected diameter of the jet nozzle, the disc would only have a very small thickness, which would possibly not be able to withstand the pressure of the hot water.
  • the thickness of the disk is greater than the depth of the rectangular funnel and the disk has a concentric bore which adjoins the outlet area and whose diameter D B is greater than the width of the outlet area of the funnel. This configuration of the disk ensures that it has the sufficient static thickness to withstand the water pressure present and, on the other hand, that the shape of the cleaning jet formed by the rectangular outlet area of the funnel is not changed by the bore provided in the disk.
  • the temperature of the water is between 100 and 150 ° C and that Water pressure between 50 and 250 bar.
  • FIG Drawings described below An embodiment, which does not limit the invention, is illustrated in FIG Drawings described below.
  • the jet nozzle 1 shown in longitudinal sections in FIGS. 1a and 1b has one cylindrical cross section with the longitudinal and symmetry axis L.
  • the body 4 of the jet nozzle 1 has a for the Connection of one intended for the supply of hot water and in the Drawings not shown supply line provided external thread 5 and a further, towards the axial outlet 3 towards further external thread 6, on which is screwed on a union nut 7, the one washer 8, the closes axial outlet 3 of the jet nozzle 1 against the body 4 of the jet nozzle 1 presses, with the interposition of a sealing ring 9.
  • This disc 8 has in its center a funnel-shaped opening 10, the Funnel 11 has a rectangular cross-section and to rotationally symmetrical chamber 12 of the jet nozzle 1 extended.
  • the width B of the funnel is approximately as large as the diameter D K of the chamber 12 of the jet nozzle 1. As can be seen in particular in FIG. 2, the width B of the funnel is significantly larger than its height H. The same applies accordingly to the Immediate exit area 13 of the funnel 11.
  • This special design of the funnel 11 ensures that the water jet emerging from the immediate exit area 13 has the desired configuration, namely a small height at a certain width, so in the manner of a spatula or other cutting tool acts on the coating to be removed from the surface to be cleaned. Since, due to the dimensions given by the jet nozzle 1, only a very small depth T of the funnel can result, the disk 8, if its thickness D S would correspond to this depth T, might not be able to withstand the pressure of the water present. For this reason, the thickness D S of the disk 8 is larger, for example twice the depth T of the funnel 11.
  • an outward-directed bore 14 adjoins this immediate exit area 13, the diameter D B of which is somewhat larger than the width B A of the immediate exit area 13 .
  • the wide ones Funnel surfaces 15 and 15 'with respect to the longitudinal axis L of the jet nozzle 1 preferably inclined at an angle ⁇ of 15 ° and the narrow funnel surfaces 16 or 16 'preferably at an angle of 80 °.
  • the angle ⁇ can, however vary between 10 ° to 45 ° and the angle ⁇ between 20 ° to 80 °.
  • the broad funnel surfaces 15 and 15 ' form the desired one, if possible razor-sharp flat jet, the narrow funnel surfaces 16 and 16 ' a compression of the inflowing hot water and thus an increase in Flow velocity and on the other hand also the width of the emerging Effect flat jet.
  • This is the previously described jet nozzle 1 according to the invention able to get the desired flat and dimensionally stable hot steam water jet train and in particular avoids that immediately after the Exit region 13 is a diffuse steam jet expanding in all directions developed.
  • This nozzle can be used, in particular, for dispersion paints, lacquers and especially heat-soluble impurities without the help of chemicals Remove gently from the surfaces to be cleaned. As a result of that Water without other additives is used Environmentally friendly jet nozzle.
  • thermo-abrasive cleaning can reduce water consumption by up to 50% because namely due to the strong compression of the superheated steam jet Efficiency of thermo-abrasive cleaning can be increased by up to 300%.

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  • Nozzles (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

A disc (8) closes the axial outlet (3), and in the centre of it is a funnel-shaped outlet aperture (10), the funnel (11) of which widens to the chamber (12). The funnel has a rectangular cross-section, the width of which is at least twice as large as its height. The cross-section of the outlet aperture (10) in its direct outlet area has preferred dimensions of width x height ie.1.6 mm x 0.7 mm. The wide funnel surfaces in relation to the longitudinal axis (L) of the jet nozzle (1) running through the outlet aperture are inclined at an angle alpha and the narrow funnel surfaces in relation to the longitudinal axis (11) at an angle beta. Alpha can vary between 10[deg] and 45[deg], but is preferably 15[deg] and beta can vary between 20[deg] and 80[deg], but preferably is 80[deg].

Description

Die Erfindung bezieht sich auf eine Strahldüse zum Einsatz bei Vorrichtungen zur Entfernung von insbesondere Beschichtungen auf Oberflächen mittels heißem und unter Druck stehendem Wasser mit einer rotationssymetrischen Kammer, die einen axialen Einlaß und einen axialen Auslaß für das heiße Wasser aufweist.The invention relates to a jet nozzle for use in devices for Removal of particularly coatings on surfaces by means of hot and pressurized water with a rotationally symmetrical chamber that a has axial inlet and an axial outlet for the hot water.

Solche mit heißem Wasser bzw. heißem Dampf betriebenen Strahldüsen sind allgemein bekannt, sie werden zur Reinigung von Oberflächen von beispielsweise Mauerwerk, Metallflächen etc. verwendet und speziell dann, wenn die Verschmutzungen auf solchen Oberflächen durch Wärmeeinfluß leichter entfernbar sind.Such jet nozzles operated with hot water or hot steam are generally known, they are used for cleaning surfaces, for example Masonry, metal surfaces etc. used and especially if the Dirt on such surfaces can be removed more easily by the influence of heat are.

Ein besonderes Problem stellt sich bei der Entfernung von auf den vorgenannten Oberflächen aufgetragenen Beschichtungen dar, die thermoplastischer Natur sind, beispielsweise farbanstriche auf Kunststoffbasis. Diese zu entfernenden Beschichtungen bilden eine im wesentlichen geschlossene und elastisch zusammenhängende Schicht, die auch bei Beaufschlagung durch heißes Wasser bzw. heißen Dampf mittels der bekannten Strahldüse nur sehr schwer zu entfernen ist und nicht ohne Einsatz zusätzlicher Hilfsmittel, wie beispielsweise Spachteln oder sonstige spanabhebende Werkzeuge durchzuführen ist.A particular problem arises in the removal of the above Surface applied coatings that are thermoplastic in nature, for example plastic-based paint coats. These to be removed Coatings form an essentially closed and elastic coherent layer, even when exposed to hot water or hot steam using the known jet nozzle is very difficult remove and not without the use of additional tools, such as Filling or other cutting tools is to be carried out.

Es ist deshalb Aufgabe der Erfindung, eine solche mittels heißem Wasser bzw. heißem Dampf betriebene Strahldüse zu schaffen, die aus ihrem axialen Auslaß einen Reinigungsstrahl mit einer besonderen Konfiguration abgibt, der nicht nur eine die zu entfernende Beschichtung aufwärmende Wirkung hat, sondern auch eine spanabhebende Wirkung, also ähnlich einem Spachtel unter die durch ihre besonderen thermoplastischen Eigenschaften zusammenhängende Beschichtung greift und deren Entfernung von der zu säubernden Oberfläche erleichtert.It is therefore an object of the invention to use hot water or hot steam powered jet nozzle to create its axial outlet emits a cleaning jet with a special configuration that not only has a heating effect on the coating to be removed, but also a cutting effect, so similar to a spatula under that by their special thermoplastic properties coherent coating engages and their removal from the surface to be cleaned easier.

Diese Aufgabe wird bei einer Strahldüse der eingangs genannten Art dadurch gelost, daß der axiale Auslaß mittels einer diesen verschließenden Scheibe bestimmter Dicke abgeschlossen ist, in deren Mitte eine trichterförmige Öffnung vorgesehen ist, deren Trichter sich zur Kammer hin erweitert, wobei der Trichter einen rechteckförmigen Querschnitt aufweist, dessen Breite B gegenüber der Höhe H mindestens doppelt so groß ist.
Die Ausbildung des Auslasses der Strahldüse als rechteckförmige Öffnung, wobei deren Breite wesentlich größer ist als deren Höhe, gewährleistet, daß der aus dieser Öffnung austretende heiße Wasserstrahl eine entsprechende Konfiguration aufweist, also bei einer bestimmten Breite eine nur geringe Höhe aufweist. Aufgrund dieser Konfiguration des Heißwasserstrahles kann dieser gegen die von der zu reinigenden Oberflache abzulösenden Beschichtung nach Art eines Spachtels gerichtet werden und dieser flache Heißwasserstrahl wirkt in der Weise, daß er zwischen Oberseite der zu reinigenden Oberfläche einerseits und Unterseite der abzuhebenden Beschichtung andererseits eindringt und dabei aufgrund seiner hohen Temperatur die Beschichtung erwärmt und elastisch macht, so daß sie von der Oberfläche abgehoben wird.This object is achieved in a jet nozzle of the type mentioned in that the axial outlet is closed off by means of a disk which closes the latter and has a funnel-shaped opening in the center thereof, the funnel of which widens towards the chamber, the funnel having a rectangular cross section has, whose width B is at least twice as large as the height H.
The design of the outlet of the jet nozzle as a rectangular opening, the width of which is substantially greater than its height, ensures that the hot water jet emerging from this opening has a corresponding configuration, that is to say it has only a small height for a certain width. Due to this configuration of the hot water jet, it can be directed against the coating to be removed from the surface to be cleaned in the manner of a spatula, and this flat hot water jet works in such a way that it penetrates between the top of the surface to be cleaned on the one hand and the underside of the coating to be lifted off on the other, and thereby its high temperature heats the coating and makes it elastic so that it is lifted off the surface.

Vorteilhaft weist der Querschnitt der Auslaßöffnung in ihrem unmittelbaren Austrittsbereich bevorzugt Abmessungen von B x H = 1,6mm x 0,7mm auf.
Diese Querschnittsgröße des Austrittsbereiches gewährleistet am besten, daß der aus der Strahldüse austretende flache Wasserstrahl nicht unmittelbar nach dem Verlassen der Strahldüse seinen wässrigen Aggregatszustand umwandelt in einen dampfförmigen Aggregatszustand. Versuche haben gezeigt, daß bei dieser vorgegebenen Konfiguration des Austrittsbereiches der Strahldüse der wasserförmige Aggregatzustand des Reinigungsstrahles auf eine Länge bis zu 10cm aufrechterhalten bleibt, bevor dieser sich in den dampfförmigen Aggregatzustand umwandelt.The cross section of the outlet opening advantageously has dimensions of W x H = 1.6 mm x 0.7 mm in its immediate exit area.
This cross-sectional size of the outlet area best ensures that the flat water jet emerging from the jet nozzle does not convert its aqueous aggregate state into a vaporous aggregate state immediately after leaving the jet nozzle. Experiments have shown that with this given configuration of the exit area of the jet nozzle, the watery state of the cleaning jet is maintained for a length of up to 10 cm before it changes into the vaporous state.

In weiterer vorteilhafter Ausbildung der Erfindung sind die breiten Trichterflächen gegenüber der mittig durch die Auslaßöffnung verlaufende Längsachse der Strahldüse jeweils unter einem Winkel α und die schmalen Trichterflächen gegenüber der Längsachse jeweils unter einem Winkel β geneigt, wobei α bevorzugt 15° und β bevorzugt 80° groß ist.
Diese Ausbildung der Neigungen der Trichterflächen zueinander gewährleistet am vorteilhaftesten die Ausbildung eines aus dem Austrittsbereich der Auslaßöffnung austretenden möglichst flachen, aber breiten Reinigungsstrahls.In a further advantageous embodiment of the invention, the broad funnel surfaces are each inclined at an angle α with respect to the longitudinal axis of the jet nozzle running centrally through the outlet opening, and the narrow funnel surfaces are each inclined at an angle β with respect to the longitudinal axis, α preferably 15 ° and β preferably 80 ° is.
This configuration of the inclinations of the funnel surfaces to one another most advantageously ensures the formation of a cleaning jet which is as flat as possible but wide and emerges from the outlet region of the outlet opening.

Vorteilhaft entspricht die Breite B des Trichters an der zur Kammer hin gerichteten Seite der Scheibe dem Durchmesser DK der Kammer. Dies bedeutet, daß die Ecken der Öffnung des Trichters an die zylindrische Innenwandung der Kammer grenzen.The width B of the funnel on the side of the disk facing the chamber advantageously corresponds to the diameter D K of the chamber. This means that the corners of the opening of the funnel border on the cylindrical inner wall of the chamber.

Aufgrund der verhältnismäßig flachen Ausbildung des Trichters und der durch den vorgewählten Durchmesser der Strahldüse begrenzten Breite des Trichters würde die Scheibe nur eine sehr geringe Dicke aufweisen, die gegebenenfalls dem anstehenden Druck des heißen Wassers nicht standhalten würde. Um einen solchen Nachteil zu vermeiden, ist erfindungsgemäß die Dicke der Scheibe größer als die Tiefe des rechteckigen Trichters und weist die Scheibe eine sich nach außen an den Austrittsbereich anschließende konzentrische Bohrung auf, deren Durchmesser DB größer als die Breite des Austrittsbereiches des Trichters ist.
Durch diese Ausbildung der Scheibe wird einerseits erreicht, daß diese die statisch ausreichende Dicke aufweist, um dem anstehenden Wasserdruck standzuhalten und andererseits die durch den rechteckigen Austrittsbereich des Trichters gebildete Form des Reinigungsstrahles nicht durch die in der Scheibe vorgesehene Bohrung verändert wird.Due to the relatively flat design of the funnel and the width of the funnel limited by the preselected diameter of the jet nozzle, the disc would only have a very small thickness, which would possibly not be able to withstand the pressure of the hot water. In order to avoid such a disadvantage, according to the invention the thickness of the disk is greater than the depth of the rectangular funnel and the disk has a concentric bore which adjoins the outlet area and whose diameter D B is greater than the width of the outlet area of the funnel.
This configuration of the disk ensures that it has the sufficient static thickness to withstand the water pressure present and, on the other hand, that the shape of the cleaning jet formed by the rectangular outlet area of the funnel is not changed by the bore provided in the disk.

Schließlich liegt die Temperatur des Wassers zwischen 100 und 150°C und der Druck des Wassers zwischen 50 und 250 bar.Finally, the temperature of the water is between 100 and 150 ° C and that Water pressure between 50 and 250 bar.

In diesen Temperatur- und Druckbereichen lassen sich die besten Reinigungsergebnisse mit der erfindungsgemäßen Strahldüse erreichen. The best can be found in these temperature and pressure ranges Achieve cleaning results with the jet nozzle according to the invention.

Ein die Erfindung nicht beschränkendes Ausführungsbeispiel wird anhand der Zeichnungen nachfolgend beschrieben.An embodiment, which does not limit the invention, is illustrated in FIG Drawings described below.

Es zeigen:

Fig. 1a
einen die Breite B des Trichters enthaltenden Längsschnitt durch die Strahldüse,
Fig. 1b
einen die Höhe H des Trichters enthaltenden Längsschnitt der Strahldüse,
Fig. 2
eine Ansicht der zur Kammer hin gerichteten Seite der den axialen Auslaß der Strahldüse abschließenden Scheibe,
Fig. 3
einen Schnitt gemäß Linie III-III in Fig. 2 und
Fig. 4
einen Schnitt gemäß Linie IV-IV in Fig. 2.
Show it:
Fig. 1a
a longitudinal section through the jet nozzle containing the width B of the funnel,
Fig. 1b
a longitudinal section of the jet nozzle containing the height H of the funnel,
Fig. 2
a view of the side facing the chamber of the disc closing the axial outlet of the jet nozzle,
Fig. 3
a section along line III-III in Fig. 2 and
Fig. 4
a section along line IV-IV in Fig. 2nd

Die in den Figuren 1a und 1b in Längsschnitten gezeigte Strahldüse 1 weist einen zylindrischen Querschnitt mit der Längs- und Symmetrieachse L auf.The jet nozzle 1 shown in longitudinal sections in FIGS. 1a and 1b has one cylindrical cross section with the longitudinal and symmetry axis L.

Das durch die Strahldüse 1 hindurchgeführte heiße und unter Druck stehende Wasser tritt in diese durch den axialen Einlaß 2 ein und verläßt die Strahldüse durch den axialen Auslaß 3. Der Körper 4 der Strahldüse 1 weist ein für den Anschluß einer für die Zuführung des heißen Wassers vorgesehenen und in den Zeichnungen nicht dargestellten Zuleitung vorgesehenes Außengewinde 5 und ein weiteres, zum axialen Auslaß 3 hin gerichtetes weiteres Außengewinde 6 auf, auf welches eine Überwurfmutter 7 aufgeschraubt ist, die eine Scheibe 8, die den axialen Auslaß 3 der Strahldüse 1 verschließt, gegen den Körper 4 der Strahldüse 1 drückt, und zwar unter Zwischenschaltung eines Dichtringes 9.The hot and pressurized passed through the jet nozzle 1 Water enters this through the axial inlet 2 and leaves the jet nozzle through the axial outlet 3. The body 4 of the jet nozzle 1 has a for the Connection of one intended for the supply of hot water and in the Drawings not shown supply line provided external thread 5 and a further, towards the axial outlet 3 towards further external thread 6, on which is screwed on a union nut 7, the one washer 8, the closes axial outlet 3 of the jet nozzle 1 against the body 4 of the jet nozzle 1 presses, with the interposition of a sealing ring 9.

Diese Scheibe 8 weist in ihrer Mitte eine trichterförmige Öffnung 10 auf, deren Trichter 11 einen rechteckigen Querschnitt aufweist und sich zur rotationssymmetrischen Kammer 12 der Strahldüse 1 hin erweitert. This disc 8 has in its center a funnel-shaped opening 10, the Funnel 11 has a rectangular cross-section and to rotationally symmetrical chamber 12 of the jet nozzle 1 extended.

Dabei ist die Breite B des Trichters annähernd so groß wie der Durchmesser DK der Kammer 12 der Strahldüse 1. Wie insbesondere der Fig. 2 zu entnehmen ist, ist die Breite B des Trichters deutlich größer als seine Höhe H. Gleiches gilt entsprechend für den unmittelbaren Austrittsbereich 13 des Trichters 11. Diese besondere Ausgestaltung des Trichters 11 gewährleistet, daß der aus dem unmittelbaren Austrittsbereich 13 austretende Wasserstrahl die gewünschte Konfiguration, nämlich bei einer bestimmten Breite eine geringe Höhe aufweist, um so nach Art eines Spachtels oder eines sonstigen spanabhebenden Werkzeuges auf die von der zu reinigenden Oberfläche zu entfernenden Beschichtung einwirkt. Da sich aufgrund der durch die Strahldüse 1 vorgegebenen Abmessungen nur eine sehr geringe Tiefe T des Trichters ergeben kann, könnte die Scheibe 8, wenn ihre Dicke DS dieser Tiefe T entsprechen würde, gegebenenfalls nicht dem Druck des anstehenden Wassers standhalten. Aus diesem Grunde ist die Dicke DS der Scheibe 8 größer, beispielsweise doppelt so groß wie die Tiefe T des Trichters 11 gewählt.The width B of the funnel is approximately as large as the diameter D K of the chamber 12 of the jet nozzle 1. As can be seen in particular in FIG. 2, the width B of the funnel is significantly larger than its height H. The same applies accordingly to the Immediate exit area 13 of the funnel 11. This special design of the funnel 11 ensures that the water jet emerging from the immediate exit area 13 has the desired configuration, namely a small height at a certain width, so in the manner of a spatula or other cutting tool acts on the coating to be removed from the surface to be cleaned. Since, due to the dimensions given by the jet nozzle 1, only a very small depth T of the funnel can result, the disk 8, if its thickness D S would correspond to this depth T, might not be able to withstand the pressure of the water present. For this reason, the thickness D S of the disk 8 is larger, for example twice the depth T of the funnel 11.

Um den aus dem unmittelbaren Austrittsbereich 13 des Trichters austretenden flachen Wasserstrahl nicht in seiner Konfiguration zu behindern, schließt sich an diesen unmittelbaren Austrittsbereich 13 eine nach außen gerichtete Bohrung 14 an, deren Durchmesser DB etwas größer ist als die Breite BA des unmittelbaren Austrittsbereiches 13.In order not to impede the configuration of the flat water jet emerging from the immediate exit area 13 of the funnel, an outward-directed bore 14 adjoins this immediate exit area 13, the diameter D B of which is somewhat larger than the width B A of the immediate exit area 13 .

Bei dem in den Figuren gezeigten rechteckförmigen Trichter 10 sind die breiten Trichterflächen 15 und 15' gegenüber der Längsachse L der Strahldüse 1 bevorzugt unter einem Winkel α von 15° geneigt und die schmalen Trichterflächen 16 bzw. 16' bevorzugt unter einem Winkel von 80°. Der Winkel α kann allerdings zwischen 10° bis 45° und der Winkel β zwischen 20° bis 80° variieren.In the rectangular funnel 10 shown in the figures, the wide ones Funnel surfaces 15 and 15 'with respect to the longitudinal axis L of the jet nozzle 1 preferably inclined at an angle α of 15 ° and the narrow funnel surfaces 16 or 16 'preferably at an angle of 80 °. The angle α can, however vary between 10 ° to 45 ° and the angle β between 20 ° to 80 °.

Die breiten Trichterflächen 15 bzw. 15' formen den gewünschten, möglichst messerscharfen Flachstrahl aus, wobei die schmalen Trichterflächen 16 bzw. 16' eine Verdichtung des anströmenden heißen Wassers und somit eine Erhöhung der Strömungsgeschwindigkeit und zum anderen auch die Breite des austretenden Flachstrahls bewirken. Diese vorbeschriebene erfindungsgemäße Strahldüse 1 ist in der Lage, den gewünschten flachen und formstabilen Heißdampfwasserstrahl auszubilden und vermeidet insbesondere, daß sich unmittelbar nach dem Austrittsbereich 13 ein diffuser und in alle Richtungen expandierender Dampfstrahl entwickelt.The broad funnel surfaces 15 and 15 'form the desired one, if possible razor-sharp flat jet, the narrow funnel surfaces 16 and 16 ' a compression of the inflowing hot water and thus an increase in Flow velocity and on the other hand also the width of the emerging Effect flat jet. This is the previously described jet nozzle 1 according to the invention able to get the desired flat and dimensionally stable hot steam water jet train and in particular avoids that immediately after the Exit region 13 is a diffuse steam jet expanding in all directions developed.

Mittels dieser Düse lassen sich insbesondere Dispersionsfarben, Lacke sowie hitzelösliche Verunreinigungen ohne Zuhilfenahme von Chemikalien besonders materialschonend von den zu reinigenden Oberflächen entfernen. Dadurch, daß Wasser ohne sonstige Zusätze verwendet wird, ist der Einsatz einer solchen Strahldüse umweltschonend.This nozzle can be used, in particular, for dispersion paints, lacquers and especially heat-soluble impurities without the help of chemicals Remove gently from the surfaces to be cleaned. As a result of that Water without other additives is used Environmentally friendly jet nozzle.

Im übrigen ist auch festzustellen, daß sich durch die Verwendung dieser Düse mit in einem Bereich von 50-250 bar unter Druck stehendem und in einem Bereich von 100 bis 150° heißem Wasser der Wasserverbrauch bis zu 50% reduzieren laßt, da nämlich aufgrund der starken Komprimierung des Heißdampfstrahls der Wirkungsgrad der thermo-abrasiven Reinigung bis zu 300% erhöhen läßt.It should also be noted that the use of this nozzle with in a range of 50-250 bar under pressure and in a range of 100 to 150 ° hot water can reduce water consumption by up to 50% because namely due to the strong compression of the superheated steam jet Efficiency of thermo-abrasive cleaning can be increased by up to 300%.

Claims (7)

Strahldüse zum Einsatz bei Vorrichtungen zur Entfernung von insbesondere Beschichtungen auf Oberflächen mittels heißem und unter Druck stehendem Wasser mit einer rotationssymmetrischen Kammer, die einen axialen Einlaß und einen axialen Auslaß für das Wasser aufweist, dadurch gekennzeichnet, daß der axiale Auslaß (3) mittels einer diesen verschlielßenden Scheibe (8) bestimmter Dicke DS abgeschlossen ist, in deren Mitte eine trichterförmige Auslaßöffnung (10) vorgesehen ist, deren Trichter (11) sich zur Kammer (12) hin erweitert, wobei der Trichter (11) einen rechteckförmigen Querschnitt aufweist, dessen Breite B gegenüber seiner Höhe H mindestens doppelt so groß ist.Jet nozzle for use in devices for removing in particular coatings on surfaces by means of hot and pressurized water with a rotationally symmetrical chamber which has an axial inlet and an axial outlet for the water, characterized in that the axial outlet (3) by means of one of these closing disc (8) of certain thickness D S is completed, in the middle of which a funnel-shaped outlet opening (10) is provided, the funnel (11) of which extends towards the chamber (12), the funnel (11) having a rectangular cross section, the Width B is at least twice as large as its height H. Strahldüse nach Anspruch 1, dadurch gekennzeichnet, daß der Querschnitt der Auslaßöffnung (10) in ihrem unmittelbaren Austrittsbereich (13) bevorzugt eine Abmessung von B x H = 1,6mm x 0,7mm aufweist.Jet nozzle according to claim 1, characterized in that the cross section the outlet opening (10) in its immediate outlet area (13) is preferred has a dimension of W x H = 1.6mm x 0.7mm. Strahldüse nach Anspruch 1, dadurch gekennzeichnet, daß die breiten Trichterflächen (15 bzw 15') gegenüber der mittig durch die Auslaßöffnung (10) verlaufende Längsachse (L) der Strahldüse (1) jeweils unter einem Winkel α und die schmalen Trichterflächen (16 bzw. 16') gegenüber der Längsachse (11) jeweils unter einem Winkel β geneigt sind, wobei α zwischen 10° bis 45° variieren kann, aber bevorzugt 15° beträgt und β zwischen 20° bis 80° variieren kann, bevorzugt aber 80° beträgt.Jet nozzle according to claim 1, characterized in that the wide Funnel surfaces (15 or 15 ') opposite to the center through the outlet opening (10) longitudinal axis (L) of the jet nozzle (1) at an angle α and the narrow funnel surfaces (16 or 16 ') with respect to the longitudinal axis (11) in each case are inclined at an angle β, where α can vary between 10 ° to 45 °, but is preferably 15 ° and β can vary between 20 ° to 80 °, preferred but is 80 °. Strahldüse nach Anspruch 1, dadurch gekennzeichnet, daß die Breite B des Trichters an der zur Kammer (12) hin gerichteten Seite der Scheibe (8) dem Durchmesser (DK) der Kammer (12) entspricht.Jet nozzle according to claim 1, characterized in that the width B of the funnel on the side of the disc (8) facing the chamber (12) corresponds to the diameter (D K ) of the chamber (12). Strahldüse nach Anspruch 1, dadurch gekennzeichnet, daß die Dicke (DS) der Scheibe (8) größer ist als die Tiefe (T) des rechteckigen Trichters (11) und die Scheibe (8) eine sich nach außen an den Austrittsbereich (13) anschließende konzentrische Bohrung (14) aufweist, deren Durchmesser (DB) größer als die Breite (B) des Austrittsbereichs (13) des Trichters (11) ist.Blasting nozzle according to claim 1, characterized in that the thickness (D S ) of the disc (8) is greater than the depth (T) of the rectangular funnel (11) and the disc (8) is directed outwards towards the outlet region (13) subsequent concentric bore (14), the diameter (D B ) is greater than the width (B) of the outlet region (13) of the funnel (11). Strahldüse nach Anspruch 1, dadurch gekennzeichnet, daß die Temperatur des Wassers zwischen 100°C und 150°C liegt.Jet nozzle according to claim 1, characterized in that the temperature the water is between 100 ° C and 150 ° C. Strahldüse nach Anspruch 1, dadurch gekennzeichnet, daß der Druck des Wassers zwischen 50 und 250 bar liegt.Jet nozzle according to claim 1, characterized in that the pressure of the Water is between 50 and 250 bar.
EP97121779A 1997-01-02 1997-12-10 Ejection nozzle for hot water / steam Withdrawn EP0861690A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997100054 DE19700054C1 (en) 1997-01-02 1997-01-02 Jet nozzle for equipment used to remove coatings on surfaces
DE19700054 1997-01-02

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EP0861690A2 true EP0861690A2 (en) 1998-09-02
EP0861690A3 EP0861690A3 (en) 1999-03-17

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10163102A1 (en) * 2001-12-20 2003-07-10 Alto Deutschland Gmbh High pressure nozzle, in particular for a high pressure cleaning device
DE10049108B4 (en) * 2000-10-04 2006-02-09 Remmers Baustofftechnik Gmbh Jet nozzle assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1373520A (en) * 1963-10-31 1964-09-25 Projection head in particular for sprayer or other applications, as well as sprayers or others provided with this device or similar device
FR2353335A1 (en) * 1976-06-04 1977-12-30 Instruments Sa Strip-section jet nozzle for continuous laser - has parallel diametral lips forming tapering passage leading to constant section passage
FR2449486A1 (en) * 1979-02-21 1980-09-19 Kaercher Gmbh & Co Alfred LIQUID NOZZLE FOR HIGH PRESSURE CLEANING APPARATUS
DE4104019C1 (en) * 1991-02-09 1992-04-23 Robert Bosch Gmbh, 7000 Stuttgart, De
EP0655281A1 (en) * 1993-11-25 1995-05-31 Kew Industri A/S Flat-jet nozzle, especially for use in a high-pressure cleaner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9320958U1 (en) * 1993-02-09 1995-07-06 Kaercher Gmbh & Co Alfred Flat jet nozzle for a high pressure cleaning device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1373520A (en) * 1963-10-31 1964-09-25 Projection head in particular for sprayer or other applications, as well as sprayers or others provided with this device or similar device
FR2353335A1 (en) * 1976-06-04 1977-12-30 Instruments Sa Strip-section jet nozzle for continuous laser - has parallel diametral lips forming tapering passage leading to constant section passage
FR2449486A1 (en) * 1979-02-21 1980-09-19 Kaercher Gmbh & Co Alfred LIQUID NOZZLE FOR HIGH PRESSURE CLEANING APPARATUS
DE4104019C1 (en) * 1991-02-09 1992-04-23 Robert Bosch Gmbh, 7000 Stuttgart, De
EP0655281A1 (en) * 1993-11-25 1995-05-31 Kew Industri A/S Flat-jet nozzle, especially for use in a high-pressure cleaner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10049108B4 (en) * 2000-10-04 2006-02-09 Remmers Baustofftechnik Gmbh Jet nozzle assembly
DE10163102A1 (en) * 2001-12-20 2003-07-10 Alto Deutschland Gmbh High pressure nozzle, in particular for a high pressure cleaning device

Also Published As

Publication number Publication date
EP0861690A3 (en) 1999-03-17
DE19700054C1 (en) 1998-04-30

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