EP3132896B1 - Nozzle system for device for dispensing a fluid jet under pressure and lance with such a nozzle system - Google Patents

Nozzle system for device for dispensing a fluid jet under pressure and lance with such a nozzle system Download PDF

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Publication number
EP3132896B1
EP3132896B1 EP16183516.0A EP16183516A EP3132896B1 EP 3132896 B1 EP3132896 B1 EP 3132896B1 EP 16183516 A EP16183516 A EP 16183516A EP 3132896 B1 EP3132896 B1 EP 3132896B1
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EP
European Patent Office
Prior art keywords
nozzle
nozzle system
coupling nut
union nut
insertion opening
Prior art date
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EP16183516.0A
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German (de)
French (fr)
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EP3132896A1 (en
Inventor
Yves Gnägi
Alessandro Campa
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Mvt Micro-Verschleiss-Technik AG
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Mvt Micro-Verschleiss-Technik AG
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Publication of EP3132896A1 publication Critical patent/EP3132896A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
    • B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
    • 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
    • B05B1/002—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to reduce the generation or the transmission of noise or to produce a particular sound; associated with noise monitoring means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/14—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts
    • B05B15/18—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts for improving resistance to wear, e.g. inserts or coatings; for indicating wear; for handling or replacing worn parts
    • 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
    • B24C5/04—Nozzles therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet

Definitions

  • the invention relates to a nozzle system for a device for dispensing a fluid jet under pressure according to the preamble of the independent claim.
  • the invention further relates to a (robot) lance for a surface processing device and / or material removal device with a nozzle system according to the invention.
  • the nozzle In known nozzle systems, the nozzle is subject to wear and is therefore usually plugged into the end of a fluid line and secured by means of a securing element with a thread or a bayonet lock in order to connect the nozzle to the end of the fluid line in a form-fitting manner and at the same time to make it interchangeable.
  • known nozzle systems are less suitable for the application of high pressures at the nozzle. Leakage problems also arise when the nozzle is inserted into the end of the fluid line, which necessitates the time-consuming replacement of seals each time the nozzle is changed.
  • US 2008/191066 A1 , US 5,226,597 and US 4,162,763 show a nozzle system in which the nozzle is firmly connected to a union nut by pressing the nozzle or a holding element into a corresponding opening.
  • JP 2012 228743 A shows another nozzle system.
  • the nozzle system for a device for dispensing a fluid jet under pressure comprises a nozzle with an inlet side and an outlet side and with at least one nozzle opening for at least one fluid and a union nut for fastening the nozzle at the end of a fluid line.
  • the nozzle is connected to the union nut. This makes it easier to install, remove and replace the nozzle, since the nozzle cannot be used incorrectly or incorrectly, for example. Furthermore, only one spare part needs to be replaced. The exchange can therefore be done with one hand.
  • the nozzle is preferably connected to the union nut via a positive and non-detachable connection.
  • the union nut and the nozzle are designed as a separate component and subsequently joined together, so that removal of the nozzle is preferably only possible by damaging the nozzle and / or the union nut.
  • the nozzle is rotationally symmetrical and has a circumferential external groove.
  • the union nut has a circumferential inner groove.
  • the nozzle and the union nut are connected to one another via a snap ring arranged in the outer groove and in the inner groove.
  • a rotationally symmetrical nozzle can be manufactured simply and precisely.
  • the connection by means of a snap ring indicates a simple type of connection, and on the other hand the removal of the nozzle from the nozzle holder is therefore without Damage to the nozzle and / or the union nut is practically impossible.
  • the union nut preferably has an insertion opening for the nozzle with a flat abutment surface, an end face abutting the abutment surface on the outlet side of the nozzle.
  • the abutment of the end face against the stop face of the union nut enables a precise alignment of the nozzle, so that the direction of flow of the fluid through the nozzle can be precisely adjusted.
  • the length of the nozzle is preferably only partially inserted into the insertion opening. More preferably, the nozzle is inserted into the insertion opening less than half of its length.
  • the part of the nozzle which has not been inserted into the insertion opening and consequently protrudes is preferably inserted into an appropriately dimensioned opening at the end of the fluid line. This allows easy handling and centering of the nozzle system when installing it.
  • a further preferred embodiment provides that an annular space is formed between the section of the nozzle which is not inserted into the insertion opening and an inner wall of the union nut.
  • the nozzle preferably has a conical sealing surface in the area of the inlet side.
  • the conical sealing surface which cooperates with a corresponding conically shaped surface of the fluid line when the nozzle system is assembled, can improve the sealing of the transition between the nozzle and the fluid line and at the same time center the nozzle in the radial direction.
  • the union nut has radial relief bores, which particularly preferably open into the annular space.
  • the relief bores allow fluid to escape if there is a leak in the transition area between the nozzle system and the fluid line.
  • the leak can be determined optically and / or acoustically.
  • the relief holes also prevent dangerous pressure build-up in the nozzle system in the event of leaks.
  • the nozzle is particularly preferably subject to play and particularly preferably inserted into the union nut with a radial and / or axial play.
  • the play of the nozzle enables the nozzle to be centered with the fluid line during the assembly of the nozzle system, in particular if the nozzle is connected to the union nut with radial play and has a conical sealing surface.
  • the nozzle is made of steel and has an inserted nozzle block made of a ceramic material.
  • the stone is particularly preferably glued to the nozzle.
  • the invention also relates to a water jet cutting device with a nozzle system according to the invention.
  • a nozzle system according to the invention allows an operating pressure of up to 3000 bar.
  • FIG. 1 A preferred embodiment of a nozzle system according to the invention is shown.
  • the nozzle system of the Figure 1 is preferably used with a cutting lance 15, as in the Figure 3 shown.
  • the Figure 2 shows a nozzle 1, which is rotationally symmetrical.
  • the nozzle 1 has a central, continuous bore through which a fluid can be conveyed from an inlet side to an outlet side of the nozzle 1 and is indicated schematically by the arrow A.
  • the inlet and outlet sides of the nozzle are in the Figures 1 to 3 each left or right of the nozzle 1.
  • a nozzle opening 2 is formed on the outlet side of the nozzle 1, which is shown schematically with an arrow.
  • An edge in the area of the inlet side of the nozzle 1 is chamfered in such a way that a conical sealing surface 12 is formed, the operation of which will be explained later.
  • An end face 9 in the region of the outlet side of the nozzle 1 forms a plane which is perpendicular to an axis of rotation of the nozzle 1.
  • a nozzle block 14 made of a ceramic material is inserted in the nozzle 1 and glued to the nozzle 1. Furthermore, the nozzle has a circumferential outer groove 5.
  • the union nut 3 is also designed as a rotationally symmetrical component with an inner, continuous bore.
  • the inner bore of the union nut 3 has areas of different diameters along the direction of arrow A.
  • the area with the larger diameter has an inner wall 10 with an internal thread.
  • This is followed by an insertion opening for the nozzle 1 with a smaller diameter, which has a circumferential inner groove 6 and a flat stop surface 8.
  • the stop surface 8 is also perpendicular to an axis of rotation of the union nut 3.
  • the stop surface 8 also has an outlet opening for the fluid, which, as in FIGS Figures 1 and 3 visible, the nozzle opening 2 exposes to the outside.
  • the nozzle 1 and the union nut 3 are connected to one another by the snap ring 7.
  • a radial depth of the outer groove 5 allows the snap ring 7 to be completely compressed and lowered into the outer groove 5 during assembly.
  • the nozzle 1 can thus be inserted into the insertion opening of the union nut 3 until the outer groove 5 coincides with the inner groove 6 and the snap ring 7 can expand again and engage in the inner groove 6.
  • the outer groove 5, the inner groove 6 and the snap ring 7 are also matched to one another in such a way that an axial play of the nozzle 1 is ensured.
  • the nozzle 1 and the insertion opening of the union nut 3 are also matched to one another in such a way that the nozzle 1 is received with a radial play in the insertion opening of the union nut 3.
  • the connection between the nozzle 1 and the union nut 3 can also no longer be released without the nozzle 1 and / or the union nut 3 being damaged
  • annular space 11 is visible, which is formed when the nozzle 1 is inserted into the insertion opening of the union nut 3 between the inner wall 10 of the union nut 3 and the nozzle 1.
  • the relief bores 13 In the case of gases as a fluid, it is also conceivable for the relief bores 13 to be designed in such a way that evasion of gas produces a whistling noise which can be heard acoustically.

Description

Die Erfindung betrifft ein Düsensystem für eine Vorrichtung zur Abgabe eines Fluidstrahls unter Druck nach dem Oberbegriff des unabhängigen Anspruchs. Die Erfindung betrifft ferner eine (Roboter-) Lanze für eine Oberflächenbearbeitungsvorrichtung und/oder Materialabtragsvorrichtung mit einem erfindungsgemässen Düsensystem.The invention relates to a nozzle system for a device for dispensing a fluid jet under pressure according to the preamble of the independent claim. The invention further relates to a (robot) lance for a surface processing device and / or material removal device with a nozzle system according to the invention.

Bei bekannten Düsensystemen unterliegt die Düse einem Verschleiss und wird daher üblicherweise am Ende einer Fluidleitung eingesteckt und mittels eines Sicherungselements mit einem Gewinde oder Bajonettverschluss gesichert, um die Düse formschlüssig mit dem Ende der Fluidleitung zu verbinden und gleichzeitig austauschbar zu machen. Es hat sich jedoch gezeigt, dass bekannte Düsensysteme weniger geeignet für die Anwendung von hohen Drucken an der Düse sind. Ferner entstehen beim Einstecken der Düse in das Ende der Fluidleitung Undichtigkeitsprobleme, welche das aufwendige Austauschen von Dichtungen bei jedem Düsenwechsel erfordern.In known nozzle systems, the nozzle is subject to wear and is therefore usually plugged into the end of a fluid line and secured by means of a securing element with a thread or a bayonet lock in order to connect the nozzle to the end of the fluid line in a form-fitting manner and at the same time to make it interchangeable. However, it has been shown that known nozzle systems are less suitable for the application of high pressures at the nozzle. Leakage problems also arise when the nozzle is inserted into the end of the fluid line, which necessitates the time-consuming replacement of seals each time the nozzle is changed.

Die US 2008/191066 A1 , US 5,226,597 und US 4,162,763 zeigen ein Düsensystem, bei welchem die Düse mit einer Überwurfmutter durch einpressen der Düse oder eines Halteelementes in eine entsprechende Öffnung fest verbunden ist. JP 2012 228743 A zeigt ein weiteres Düsensystem.The US 2008/191066 A1 , US 5,226,597 and US 4,162,763 show a nozzle system in which the nozzle is firmly connected to a union nut by pressing the nozzle or a holding element into a corresponding opening. JP 2012 228743 A shows another nozzle system.

Es ist daher Aufgabe der Erfindung ein Düsensystem der eingangs genannten Art anzugeben, welche die Nachteile des Bekannten vermeidet und insbesondere den Betrieb bei hohen Drücken erlaubt. Ferner will die Erfindung das Austauschen der Düse unter Gewährleistung der Dichtigkeit verbessern.It is therefore an object of the invention to provide a nozzle system of the type mentioned, which avoids the disadvantages of the known and in particular allows operation at high pressures. Furthermore, the invention aims to improve the replacement of the nozzle while ensuring tightness.

Die Aufgabe wird von einem Düsensystem nach dem Kennzeichen des unabhängigen Anspruchs gelöst.The object is achieved by a nozzle system according to the characterizing part of the independent claim.

Das Düsensysteme für eine Vorrichtung zur Abgabe eines Fluidstrahls unter Druck umfasst eine Düse mit einer Eintrittsseite und einer Austrittsseite sowie mit wenigstens einer Düsenöffnung für zumindest ein Fluid und eine Überwurfmutter zur Befestigung der Düse am Ende einer Fluidleitung.The nozzle system for a device for dispensing a fluid jet under pressure comprises a nozzle with an inlet side and an outlet side and with at least one nozzle opening for at least one fluid and a union nut for fastening the nozzle at the end of a fluid line.

Die Düse ist mit der Überwurfmutter verbunden. Damit wird eine Vereinfachung des Ein-, Ausbaus und Austauschs der Düse ermöglicht, da die Düse beispielsweise nicht falsch oder verkehrt eingesetzt werden kann. Ferner muss nur ein Ersatzteil ausgetauscht werden. Das Austauschen kann somit insbesondere einhändig erfolgen.The nozzle is connected to the union nut. This makes it easier to install, remove and replace the nozzle, since the nozzle cannot be used incorrectly or incorrectly, for example. Furthermore, only one spare part needs to be replaced. The exchange can therefore be done with one hand.

Die Düse ist bevorzugt über eine formschlüssige und unlösbare Verbindung mit der Überwurfmutter verbunden. Die Überwurfmutter und die Düse sind als separates Bauteil ausgebildet und nachträglich zusammengefügt, so dass ein Entfernen der Düse bevorzugt nur durch Beschädigung der Düse und/oder der Überwurfmutter möglich ist.The nozzle is preferably connected to the union nut via a positive and non-detachable connection. The union nut and the nozzle are designed as a separate component and subsequently joined together, so that removal of the nozzle is preferably only possible by damaging the nozzle and / or the union nut.

Erfindungsgemäss ist die Düse rotationssymmetrisch ausgebildet und weist eine umlaufende Aussennut auf. Entsprechend weist die Überwurfmutter eine umlaufende Innennut auf. Die Düse und die Überwurfmutter sind dabei miteinander über einen in der Aussennut und in der Innennut angeordneten Sprengring verbunden.According to the invention, the nozzle is rotationally symmetrical and has a circumferential external groove. Accordingly, the union nut has a circumferential inner groove. The nozzle and the union nut are connected to one another via a snap ring arranged in the outer groove and in the inner groove.

Eine rotationssymmetrische Düse kann einfach und präzise gefertigt werden. Durch die Verbindung mittels eines Sprengrings wird einerseits eine einfache Art der Verbindung angegeben, andererseits ist somit die Entfernung der Düse aus dem Düsenhalter ohne Beschädigung der Düse und/oder der Überwurfmutter praktisch unmöglich.A rotationally symmetrical nozzle can be manufactured simply and precisely. The connection by means of a snap ring on the one hand indicates a simple type of connection, and on the other hand the removal of the nozzle from the nozzle holder is therefore without Damage to the nozzle and / or the union nut is practically impossible.

Die Überwurfmutter weist bevorzugt eine Einstecköffnung für die Düse mit einer planen Anschlagfläche auf, wobei eine Stirnfläche an der Austrittsseite der Düse an der Anschlagfläche anliegt.The union nut preferably has an insertion opening for the nozzle with a flat abutment surface, an end face abutting the abutment surface on the outlet side of the nozzle.

Das Anliegen der Stirnfläche an der Anschlagfläche der Überwurfmutter ermöglicht eine präzise Ausrichtung der Düse, so dass die Strömungsrichtung des Fluides durch die Düse genau einstellbar ist.The abutment of the end face against the stop face of the union nut enables a precise alignment of the nozzle, so that the direction of flow of the fluid through the nozzle can be precisely adjusted.

Bevorzugt wird die Düse nur teilweise bezüglich ihrer Länge in die Einstecköffnung eingesteckt. Weiter bevorzugt wird die Düse weniger als die Hälfte ihrer Länge in die Einstecköffnung eingesteckt.The length of the nozzle is preferably only partially inserted into the insertion opening. More preferably, the nozzle is inserted into the insertion opening less than half of its length.

Der Teil der Düse, welcher nicht in die Einstecköffnung eingesteckt worden ist und folglich hervorsteht wird bevorzugt in eine entsprechend bemasste Öffnung am Ende der Fluidleitung eingesteckt. Das erlaubt eine einfache Handhabung und Zentrierung des Düsensystems beim Einbau desselben.The part of the nozzle which has not been inserted into the insertion opening and consequently protrudes is preferably inserted into an appropriately dimensioned opening at the end of the fluid line. This allows easy handling and centering of the nozzle system when installing it.

Eine weitere bevorzugte Ausführungsform sieht vor, dass zwischen dem nicht in die Einstecköffnung eingesteckten Abschnitt der Düse und einer Innenwand der Überwurfmutter ein ringförmiger Raum gebildet wird.A further preferred embodiment provides that an annular space is formed between the section of the nozzle which is not inserted into the insertion opening and an inner wall of the union nut.

Dadurch entsteht ein mäanderförmiger Verlauf der Übergangsfläche zwischen Düsensystem und Fluidleitung, welcher die Dichteigenschaften verbessert.This creates a meandering course of the transition surface between the nozzle system and the fluid line, which improves the sealing properties.

Die Düse weist bevorzugt im Bereich der Eintrittsseite eine konische Dichtfläche auf.The nozzle preferably has a conical sealing surface in the area of the inlet side.

Durch die konische Dichtfläche, welche beim Zusammenbau des Düsensystems mit einer entsprechen konisch geformten Fläche der Fluidleitung zusammenwirkt, kann die Abdichtung des Überganges zwischen Düse und Fluidleitung verbessert werden und gleichzeitig die Düse in radialer Richtung zentriert werden.The conical sealing surface, which cooperates with a corresponding conically shaped surface of the fluid line when the nozzle system is assembled, can improve the sealing of the transition between the nozzle and the fluid line and at the same time center the nozzle in the radial direction.

Die Überwurfmutter weist radiale Entlastungsbohrungen auf, welche besonders bevorzugt in den ringförmigen Raum münden.The union nut has radial relief bores, which particularly preferably open into the annular space.

Die Entlastungsbohrungen erlauben ein Entweichen von Fluid, falls eine Undichtigkeit im Übergangsbereich zwischen dem Düsensystem und der Fluidleitung auftreten sollte. Dabei kann die Undichtigkeit optisch und/oder akustisch feststellbar sein. Die Entlastungsbohrungen verhindern auch einen gefährlichen Druckaufbau im Düsensystem bei Undichtigkeiten.The relief bores allow fluid to escape if there is a leak in the transition area between the nozzle system and the fluid line. The leak can be determined optically and / or acoustically. The relief holes also prevent dangerous pressure build-up in the nozzle system in the event of leaks.

Besonders bevorzugt ist die Düse spielbehaftet und besonders bevorzugt mit einem radialen und/oder axialen Spiel in die Überwurfmutter eingesteckt.The nozzle is particularly preferably subject to play and particularly preferably inserted into the union nut with a radial and / or axial play.

Das Spiel der Düse ermöglicht eine Zentrierung der Düse mit der Fluidleitung bei der Montage des Düsensystems, insbesondere wenn die Düse radial spielbehaftet mit der Überwurfmutter verbunden ist und eine konische Dichtfläche aufweist. Die Düse ist aus Stahl gefertigt und mit einem eingesetzten Düsenstein aus einem keramischen Werkstoff versehen. Der Stein ist besonders bevorzugt mit der Düse verklebt.The play of the nozzle enables the nozzle to be centered with the fluid line during the assembly of the nozzle system, in particular if the nozzle is connected to the union nut with radial play and has a conical sealing surface. The nozzle is made of steel and has an inserted nozzle block made of a ceramic material. The stone is particularly preferably glued to the nozzle.

Die Erfindung betrifft ausserdem eine Wasserstrahlschneidvorrichtung mit einem erfindungsgemässen Düsensystem.The invention also relates to a water jet cutting device with a nozzle system according to the invention.

Ein erfindungsgemässes Düsensystem erlaubt einen Betriebsdruck von bis zu 3000 bar.A nozzle system according to the invention allows an operating pressure of up to 3000 bar.

Die Erfindung wird nachfolgend Anhand eines bevorzugten Ausführungsbeispiels in Verbindung mit der Zeichnung besser beschrieben. Es zeigen:

Fig. 1
eine Schnittansicht einer bevorzugten Ausführungsform eines erfindungsgemässen Düsensystems,
Fig. 2
eine Explosionsdarstellung des Düsensystems der Figur 1, und
Fig. 3
eine Schneidlanze mit angeschraubtem Düsensystem gemäss Figuren 1 und 2.
The invention is described below with reference to a preferred embodiment in connection with the drawing. Show it:
Fig. 1
2 shows a sectional view of a preferred embodiment of a nozzle system according to the invention,
Fig. 2
an exploded view of the nozzle system of the Figure 1 , and
Fig. 3
a cutting lance with screwed nozzle system according to Figures 1 and 2nd .

In den Figuren 1, 2 und 3 ist eine bevorzugte Ausführungsform eines erfindungsgemässen Düsensystems gezeigt. Das Düsensystem der Figur 1 wird bevorzugt bei einer Schneidlanze 15 verwendet, wie in der Figur 3 gezeigt.In the Figures 1 , 2nd and 3rd A preferred embodiment of a nozzle system according to the invention is shown. The nozzle system of the Figure 1 is preferably used with a cutting lance 15, as in the Figure 3 shown.

Die Figur 2, aus welcher die Aufbaudetails besser ersichtlich sind, zeigt eine Düse 1, welche rotationssymmetrisch ausgebildet ist.The Figure 2 , from which the construction details can be seen better, shows a nozzle 1, which is rotationally symmetrical.

Die Düse 1 weist eine zentrale, durchgehende Bohrung auf, durch welche ein Fluid von einer Eintrittsseite zur einer Austrittsseite der Düse 1 gefördert werden kann und schematisch durch den Pfeil A angedeutet wird. Eintrittsseite und Austrittsseite der Düse befinden sich in den Figuren 1 bis 3 jeweils links bzw. rechts der Düse 1. An der Austrittsseite der Düse 1 ist eine Düsenöffnung 2 ausgebildet, welche schematisch mit einem Pfeil gezeigt wird.The nozzle 1 has a central, continuous bore through which a fluid can be conveyed from an inlet side to an outlet side of the nozzle 1 and is indicated schematically by the arrow A. The inlet and outlet sides of the nozzle are in the Figures 1 to 3 each left or right of the nozzle 1. A nozzle opening 2 is formed on the outlet side of the nozzle 1, which is shown schematically with an arrow.

Eine Kante im Bereich der Eintrittsseite der Düse 1 ist derart angeschrägt, dass eine konische Dichtfläche 12 gebildet wird, deren Funktionsweise später erläutert wird. Eine Stirnfläche 9 im Bereich der Austrittsseite der Düse 1 bildet eine Ebene, welche senkrecht zu einer Rotationsachse der Düse 1 steht.An edge in the area of the inlet side of the nozzle 1 is chamfered in such a way that a conical sealing surface 12 is formed, the operation of which will be explained later. An end face 9 in the region of the outlet side of the nozzle 1 forms a plane which is perpendicular to an axis of rotation of the nozzle 1.

In der Düse 1 ist ein Düsenstein 14 aus einem keramischen Werkstoff eingesetzt und mit der Düse 1 verklebt worden. Ferner weist die Düse eine umfängliche Aussennut 5 auf.A nozzle block 14 made of a ceramic material is inserted in the nozzle 1 and glued to the nozzle 1. Furthermore, the nozzle has a circumferential outer groove 5.

Die Überwurfmutter 3 ist ebenfalls als rotationssymmetrisches Bauteil mit einer inneren, durchgehenden Bohrung ausgebildet. Die innere Bohrung der Überwurfmutter 3 weist entlang der Richtung des Pfeils A Bereiche unterschiedlichen Durchmessers auf. Der Bereich mit dem grösseren Durchmesser weist eine Innenwand 10 mit einem Innengewinde auf. Dem folgt eine Einstecköffnung für die Düse 1 mit kleinerem Durchmesser, welcher eine umlaufende Innennut 6 und eine ebene Anschlagfläche 8 aufweist. Die Anschlagfläche 8 steht ebenfalls senkrecht zu einer Rotationsachse der Überwurfmutter 3. Die Anschlagfläche 8 weist ferner eine Austrittsöffnung für das Fluid auf, welche, wie in den Figuren 1 und 3 sichtbar, die Düsenöffnung 2 nach Aussen hin freigibt.The union nut 3 is also designed as a rotationally symmetrical component with an inner, continuous bore. The inner bore of the union nut 3 has areas of different diameters along the direction of arrow A. The area with the larger diameter has an inner wall 10 with an internal thread. This is followed by an insertion opening for the nozzle 1 with a smaller diameter, which has a circumferential inner groove 6 and a flat stop surface 8. The stop surface 8 is also perpendicular to an axis of rotation of the union nut 3. The stop surface 8 also has an outlet opening for the fluid, which, as in FIGS Figures 1 and 3 visible, the nozzle opening 2 exposes to the outside.

Die Düse 1 und die Überwurfmutter 3 werden durch den Sprengring 7 miteinander verbunden. Eine radiale Tiefe der Aussennut 5 erlaubt, dass der Sprengring 7 beim Zusammenbauen komplett in die Aussennut 5 zusammendrückbar und absenkbar ist. Die Düse 1 kann somit, in die Einstecköffnung der Überwurfmutter 3 eingefügt werden, bis die Aussennut 5 mit der Innennut 6 übereinstimmt und der Sprengring 7 sich wieder ausdehnen und in die Innennut 6 eingreifen kann. Die Aussennnut 5, die Innennut 6 und der Sprengring 7 sind ferner derart aufeinander abgestimmt, dass ein axiales Spiel der Düse 1 gewährleistet ist. Ferner sind die Düse 1 und die Einstecköffnung der Überwurfmutter 3 ebenfalls derart aufeinander abgestimmt, dass die Düse 1 mit einem radialen Spiel in die Einstecköffnung der Überwurfmutter 3 aufgenommen wird. Die Verbindung zwischen Düse 1 und Überwurfmutter 3 kann ferner nicht mehr gelöst werden, ohne dass die Düse 1 und/oder die Überwurfmutter 3 beschädigt wirdThe nozzle 1 and the union nut 3 are connected to one another by the snap ring 7. A radial depth of the outer groove 5 allows the snap ring 7 to be completely compressed and lowered into the outer groove 5 during assembly. The nozzle 1 can thus be inserted into the insertion opening of the union nut 3 until the outer groove 5 coincides with the inner groove 6 and the snap ring 7 can expand again and engage in the inner groove 6. The outer groove 5, the inner groove 6 and the snap ring 7 are also matched to one another in such a way that an axial play of the nozzle 1 is ensured. Furthermore, the nozzle 1 and the insertion opening of the union nut 3 are also matched to one another in such a way that the nozzle 1 is received with a radial play in the insertion opening of the union nut 3. The connection between the nozzle 1 and the union nut 3 can also no longer be released without the nozzle 1 and / or the union nut 3 being damaged

Beim Aufschrauben der Überwurfmutter 3 auf das Ende einer Fluidleitung 4, wie in Figur 3 dargestellt, erfährt die Stirnfläche 9 der Düse 1 einen Anschlag gegen die Anschlagfläche 8 der Überwurfmutter 3 und wird somit ausgerichtet und abgedichtet. Die konische Dichtfläche 12 der Düse 1 wirkt mit einer entsprechenden Fläche der Fluidleitung 4 zusammen und bewirkt eine radiale Zentrierung und ebenfalls eine Abdichtung der Düse 1.When screwing the union nut 3 onto the end of a fluid line 4, as in Figure 3 shown, the end face 9 of the nozzle 1 experiences a stop against the stop surface 8 of the union nut 3 and is thus aligned and sealed. The conical sealing surface 12 of the nozzle 1 interacts with a corresponding surface of the fluid line 4 and effects radial centering and also a sealing of the nozzle 1.

In den Figuren 1 und 3 ist ein ringförmiger Raum 11 sichtbar, welcher beim Einstecken der Düse 1 in die Einstecköffnung der Überwurfmutter 3 zwischen der Innenwand 10 der Überwurfmutter 3 und der Düse 1 gebildet wird. Entlastungsbohrungen 13, von denen nur eine in den Figuren mit einem Bezugszeichen versehen ist, verbinden eine Aussenseite der Schneidlanze 15 mit dem ringförmigen Raum 11, so dass bei einer Undichtigkeit des Überganges zwischen Düse 1, Überwurfmutter 3 und/oder Fluidleitung 4 Leckfluid über die Entlastungsbohrungen 13 entweichen kann. Ein Leck kann somit optisch ermittelt werden. Bei Gasen als Fluid ist es zudem denkbar, dass die Entlastungsbohrungen 13 derart ausgebildet sind, dass ein Ausweichen von Gas ein Pfeifgeräusch erzeugt, welches akustisch wahrnehmbar ist.In the Figures 1 and 3 an annular space 11 is visible, which is formed when the nozzle 1 is inserted into the insertion opening of the union nut 3 between the inner wall 10 of the union nut 3 and the nozzle 1. Relief bores 13, only one of which is provided with a reference symbol in the figures, connect an outer side of the cutting lance 15 to the annular space 11, so that in the event of a leak in the transition between the nozzle 1, union nut 3 and / or fluid line 4, leakage fluid via the relief bores 13 can escape. A leak can thus be determined optically. In the case of gases as a fluid, it is also conceivable for the relief bores 13 to be designed in such a way that evasion of gas produces a whistling noise which can be heard acoustically.

Claims (9)

  1. Nozzle system for a device for delivering a fluid jet under pressure comprising:
    - a nozzle (1) with an inlet side and an outlet side and with at least one nozzle opening (2) for at least one fluid, and
    - a coupling nut (3) for fixing the nozzle (1) at the end of a fluid line (4),
    wherein the nozzle (1) is connected to the coupling nut (3), in particular via a form-fitting and non-detachable connection, wherein the nozzle (1) is of rotationally symmetrical design and has a circumferential outer groove (5), and in that the coupling nut (3) has a circumferential inner groove (6), wherein nozzle (1) and coupling nut (3) are connected to each other via a snap ring (7) arranged in the outer groove (5) and in the inner groove (6), characterised in that the coupling nut (3) has radial relief bores (13).
  2. Nozzle system according to claim 1, characterized in that the coupling nut (3) has an insertion opening for the nozzle (1) with a plane stop surface (8), an end face (9) on the outlet side of the nozzle (1) resting against the stop surface (8)
  3. Nozzle system according to claim 2, characterized in that the nozzle (1) is only partially inserted into the insertion opening with respect to its length, preferably less than half of its length.
  4. Nozzle system according to claim 3, characterized in that an annular space (11) is formed between the portion of the nozzle (1) not inserted into the insertion opening and an inner wall (10) of the coupling nut (3).
  5. Nozzle system according to one of claims 1 to 4, characterized in that the nozzle (1) has a conical sealing surface (12) in the region of the inlet side.
  6. Nozzle system according to claims 1 and 4, characterized in that the relief bores open into the annular space (11).
  7. Nozzle system according to one of claims 1 to 6, characterised in that the nozzle (1) is subject to play, in particular is inserted into the coupling nut with radial and/or axial play.
  8. Nozzle system according to any of the preceding claims, characterized by a nozzle (1) of steel with an inserted nozzle stone (14) of a ceramic material.
  9. Cutting lance (15) for a surface processing device and/or material removal device with a nozzle system according to one of claims 1 to 8.
EP16183516.0A 2015-08-21 2016-08-10 Nozzle system for device for dispensing a fluid jet under pressure and lance with such a nozzle system Active EP3132896B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01213/15A CH711443B1 (en) 2015-08-21 2015-08-21 Nozzle system for a device for delivering a fluid jet under pressure, nozzle for such a nozzle system and cutting lance with such a nozzle system.

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EP3132896A1 EP3132896A1 (en) 2017-02-22
EP3132896B1 true EP3132896B1 (en) 2020-05-27

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114178065A (en) * 2021-11-22 2022-03-15 拉思丁科技(深圳)有限公司 High-pressure water jet gem nozzle

Citations (1)

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Publication number Priority date Publication date Assignee Title
JP2012228743A (en) * 2011-04-26 2012-11-22 Toshiba Mach Co Ltd Jet gun for liquid honing

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US3705693A (en) * 1971-07-16 1972-12-12 Norman Franz Means for sealing fittings and nozzle assemblies at extremely high fluid pressures
US4162763A (en) * 1978-01-10 1979-07-31 Camsco, Inc. Water jet valve assembly
SU1199271A1 (en) * 1983-12-20 1985-12-23 Специальное Конструкторское Бюро Гидроимпульсной Техники Со Ан Ссср Injector for obtaining the cutting jet of liquid
US5226597A (en) * 1991-09-16 1993-07-13 Ursic Thomas A Orifice assembly and method providing highly cohesive fluid jet
US5730358A (en) * 1995-12-22 1998-03-24 Flow International Corporation Tunable ultrahigh-pressure nozzle
US20080191066A1 (en) * 2007-02-13 2008-08-14 Ted Jernigan Water cutting assembly and nozzle nut
JP6243745B2 (en) * 2014-01-27 2017-12-06 株式会社スギノマシン Fluid nozzle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012228743A (en) * 2011-04-26 2012-11-22 Toshiba Mach Co Ltd Jet gun for liquid honing

Also Published As

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CH711443B1 (en) 2019-05-31
EP3132896A1 (en) 2017-02-22
CH711443A1 (en) 2017-02-28

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