EP2698210A1 - Spray nozzle device, in particular for spraying a cast strand - Google Patents

Spray nozzle device, in particular for spraying a cast strand Download PDF

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Publication number
EP2698210A1
EP2698210A1 EP12005888.8A EP12005888A EP2698210A1 EP 2698210 A1 EP2698210 A1 EP 2698210A1 EP 12005888 A EP12005888 A EP 12005888A EP 2698210 A1 EP2698210 A1 EP 2698210A1
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EP
European Patent Office
Prior art keywords
spray nozzle
air
water
mixing chamber
nozzle device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12005888.8A
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German (de)
French (fr)
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EP2698210B1 (en
Inventor
Louis Kuster
Klaus Von Eynatten
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.)
SMS Concast AG
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SMS Concast AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to EP12005888.8A priority Critical patent/EP2698210B1/en
Application filed by SMS Concast AG filed Critical SMS Concast AG
Priority to CN201380042934.5A priority patent/CN104520012B/en
Priority to BR112015003028A priority patent/BR112015003028A2/en
Priority to US14/620,275 priority patent/US10286446B2/en
Priority to KR20157003906A priority patent/KR20150042208A/en
Priority to RU2015107120A priority patent/RU2015107120A/en
Priority to PCT/EP2013/066923 priority patent/WO2014026992A2/en
Publication of EP2698210A1 publication Critical patent/EP2698210A1/en
Application granted granted Critical
Publication of EP2698210B1 publication Critical patent/EP2698210B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1246—Nozzles; Spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0483—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with gas and liquid jets intersecting in the mixing chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D30/00—Cooling castings, not restricted to casting processes covered by a single main group
    • 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

Definitions

  • the invention relates to a spray nozzle device, in particular for spraying a casting strand, comprising a mixing body having a diffuser-like mixing chamber, which is provided with an air inlet, a water inlet and a nozzle outlet arranged on the side opposite the air inlet, through which an air / water mixture emerges.
  • Spray nozzles of this type are known to be used for cooling a casting strand during casting.
  • the aim is to achieve as uniform a cooling effect as possible in order to prevent cracks in the hot glasstrack during the cooling process.
  • the efforts to construct the spray nozzle so that the discharged cooling jet is structurally homogeneous.
  • the required cooling effect is different from case to case, both for procedural reasons as well as due to the dimensions and / or the geometry of the deducted format.
  • the conditions of use of the spray nozzle with respect to the air and / or water pressure or the air andlor water flow are variable.
  • a spray nozzle arrangement of this kind is in the EP-0 161 307 revealed. It consists of a Vorvernebelungskopf and a nozzle mouth piece with its own mixing chamber, which is provided with a discharge opening for narrow fan-shaped spray patterns.
  • the purpose of the arrangement is to produce in such spray patterns a spray jet which has a high degree of nebulization and contains liquid droplets of uniform size over the entire length and width.
  • the invention has for its object to provide a spray nozzle of the type mentioned, which ensures a high degree of nebulization and high uniformity of the spray regardless of the casting process or format of the product to be cooled. Furthermore, this should also be ensured regardless of the set media pressures.
  • the air inlet has a region projecting into the mixing chamber and is provided there with at least one air outlet bore directed approximately transversely to the longitudinal axis, while the water inlet is through at least one near the tip of the air inlet approximately transverse to the longitudinal axis directed bore ,
  • this arrangement has the advantage that in her the air flow or the air pressure and the water flow or the water pressure do not influence each other to any appreciable extent, so that in procedural or format-related changes of these sizes of votes from the spray nozzle Cooling beam remains stable with respect to the degree of atomization and the uniformity of the cooling jet.
  • the invention further provides that the air inlet of the mixing body is formed by a diaphragm projecting into the mixing chamber, which is provided in a plane transverse to its longitudinal axis with at least one circumferentially distributed radial outlet holes. This simplifies the manufacture, assembly and maintenance of the spray nozzle.
  • the region of the air inlet nozzle projecting into the mixing chamber has an outer diameter of less than half the inner diameter of the mixing chamber.
  • the air inlet nozzle can also be provided with a directed in the axial direction of the mixing chamber air outlet bore.
  • the operation of the spray nozzle advantageous if its mixing chamber is cylindrical and has a length of preferably twice the inner diameter.
  • the invention also provides that the mixing body has a replaceable nozzle head with an outlet opening for the air / water mixture, the geometry of which can be fixed according to the respectively required spray pattern. In this way, the nozzle can be easily adapted to variable operating conditions.
  • the spray nozzle device according to Fig. 1 to Fig. 4 is used to spray a cast strand with an air / water mixture to cool it during casting.
  • the mixing body 1 has a mixing chamber 2 which is provided with an air inlet 3, a water inlet 4 and a nozzle outlet 5.
  • the mixing chamber 2 of the mixing body 1 is cylindrical. Its length is about twice the inner diameter of the mixing chamber.
  • the air inlet 3 is arranged in an air inlet nozzle 6, the tip 7 of which protrudes into the upper region of the mixing chamber.
  • the air inlet nozzle 6 is aligned coaxially with the mixing chamber 2, and its outer diameter is smaller there than half the inner diameter of the mixing chamber. In this area, it is provided with air outlet bores 9 which extend radially from the latter approximately transversely to the longitudinal axis of the mixing chamber and which are distributed uniformly circumferentially in a plane transverse to the longitudinal axis.
  • the water inlet 4 opens into the mixing chamber 2 near the tip 7 of the air inlet 3 with a directed transversely to the longitudinal axis of the water outlet hole 11 whose distance from the tip 7 is dimensioned so that the water jet flowing from it does not affect the air outlet holes 9.
  • the described spray nozzle is equipped with only one water outlet hole. In principle, it can also be provided with a plurality of circumferentially distributed water outlet holes.
  • the water inlet 4 is formed by an approximately parallel to the longitudinal axis of the mixing body 1 extending bore 11 'and through this transverse water outlet hole 11.
  • a replaceable filter 19 and subsequently a diaphragm 4' included and also it is provided with an overbore 11 ", which is formed as an extension starting from the transverse water outlet bore 11 and for calming the guided into the water outlet hole 11 Water serves.
  • the radial air outlet holes 9 are designed with a slight angle to the vertical plane, wherein the inclination angle in a range of +/- max. 15 ° can vary. Moreover, they could also be oriented radially at least approximately tangentially, whereby a turbulence of the flowing into the mixing chamber water jet is generated, which brings a uniformly fine-structured nebulization of the air / water mixture with it.
  • the cylindrically shaped mixing body 1 has in extension of the mixing chamber 2 a likewise cylindrical projection 14, on whose End of a replaceable nozzle head 15 with an air / water mixture outlet opening 16 is mounted.
  • the compound of the nozzle head 15 on the mixing body 1 is arranged in the projection 14 of the mixing body.
  • centering means 17 for positioning the nozzle head 15 to the mixing body 1 are indicated on the lower end face of the cylindrical projection 14.
  • an orifice 4 'for throttling the supplied air or the water is provided in each case.
  • Both the air outlet holes and the water outlet holes can be aligned instead of radially at least approximately tangentially.
  • An extension tube could also be provided between the mixing body 1 and the nozzle outlet 5, for example if smaller formats of strands are cast.
  • the graph shows the water pressure (bar) in the x-axis and the water and air flow (l / min or m 3 / h) in the y-axis.
  • the air flow course 1A-2A and the water flow course 1B-2B are at a constant air pressure of 2 bar or 3 bar and a constant air flow of 6.0 m 3 / h and 7.8 m 3 / h shown.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Continuous Casting (AREA)

Abstract

Spray nozzle device comprises a mixing chamber (2) which acts as a diffuser and has a mixing body (1). The mixing chamber is provided with an air inlet (3), a water inlet (4), and a nozzle outlet (5) oriented approximately in alignment with the air inlet through which an air or water mixture exits. The air inlet comprises a region projecting in the mixing chamber, and at least one air outlet hole, which is perpendicular to the longitudinal axis of the mixing chamber. The water enters near the tip through at least one water outlet hole, which is oriented perpendicular to the longitudinal axis.

Description

Die Erfindung betrifft eine Sprühdüseneinrichtung insbesondere zum Besprühen eines Giessstrangs, mit einem eine diffusorartig wirkende Mischkammer aufweisenden Mischkörper, der mit einem Lufteinlass, einem Wassereinlass und einer auf der zum Lufteinlass gegenüberliegenden Seite angeordneten Düsenauslass versehen ist, durch welchen ein Luft/Wassergemisch austritt.The invention relates to a spray nozzle device, in particular for spraying a casting strand, comprising a mixing body having a diffuser-like mixing chamber, which is provided with an air inlet, a water inlet and a nozzle outlet arranged on the side opposite the air inlet, through which an air / water mixture emerges.

Sprühdüsen dieser Art werden bekanntlich zum Kühlen eines Giessstranges während des Abgiessens eingesetzt. Hierbei wird eine möglichst gleichmässige Kühlwirkung angestrebt, um zu verhindern, dass beim Kühlvorgang Risse im heissen Glessstrang entstehen können. Daher die Bemühungen, die Sprühdüse so zu konstruieren, dass der abgegebene Kühlstrahl strukturell homogen ist. Die jeweils erforderliche Kühlwirkung ist allerdings von Fall zu Fall unterschiedlich, sowohl aus verfahrenstechnischen Gründen als auch aufgrund der Abmessungen und/oder der Geometrie des abzugiessenden Formats. Dadurch sind die Einsatzbedingungen der Sprühdüse hinsichtlich des Luft- und/oder Wasserdrucks bzw. der Luft- undloder Wasserströmung variabel.Spray nozzles of this type are known to be used for cooling a casting strand during casting. In this case, the aim is to achieve as uniform a cooling effect as possible in order to prevent cracks in the hot glasstrack during the cooling process. Hence the efforts to construct the spray nozzle so that the discharged cooling jet is structurally homogeneous. However, the required cooling effect is different from case to case, both for procedural reasons as well as due to the dimensions and / or the geometry of the deducted format. Thus, the conditions of use of the spray nozzle with respect to the air and / or water pressure or the air andlor water flow are variable.

Die bisher bekannten Sprühdüsen dieser Art haben den Nachteil, dass bei ihnen beide Grössen sich im Betrieb gegenseitig beeinflussen. Das führt zu einer ungleichmässigen Beaufschlagung des Giesstrangs mit sich punktuell bildenden Wassertropfenansammlungen, die örtlich die Kühlwirkung des Sprühstrahls in unzulässigem Mass beeinträchtigen.The previously known spray nozzles of this type have the disadvantage that in both sizes affect each other in operation. This leads to an uneven loading of Gießstrangs with punctiform water droplets accumulation, locally affect the cooling effect of the spray to an inadmissible degree.

Eine Sprühdüsenanordnung dieser Art ist in der EP-0 161 307 geoffenbart. Sie besteht aus einem Vorvernebelungskopf und einem Düsenmündungsstück mit einer eigenen Mischkammer, die mit einer Abgabeöffnung für schmale fächerförmige Sprühmuster versehen ist. Sinn und Zweck der Anordnung ist es, bei derartigen Sprühmustern einen Sprühstrahl zu erzeugen, der einen hohen Vernebelungsgrad aufweist und auf der gesamten Länge und Breite Flüssigkeitströpfchen gleichmässiger Grösse beinhaltet. Die aus der gegenseitigen Beeinflussung des Luft - und Wasserdrucks bzw. der Luft- und Wasserströmung herrührenden Probleme sind nicht zufriedenstellend gelöst.A spray nozzle arrangement of this kind is in the EP-0 161 307 revealed. It consists of a Vorvernebelungskopf and a nozzle mouth piece with its own mixing chamber, which is provided with a discharge opening for narrow fan-shaped spray patterns. The purpose of the arrangement is to produce in such spray patterns a spray jet which has a high degree of nebulization and contains liquid droplets of uniform size over the entire length and width. The problems resulting from the mutual influence of the air and water pressure or the air and water flow are not satisfactorily solved.

Der Erfindung liegt die Aufgabe zugrunde, eine Sprühdüse der eingangs genannten Art zu schaffen, die einen hohen Vernebelungsgrad und eine hohe Gleichmässigkeit des Sprühstrahls unabhängig vom Giessverfahren oder Format des abzukühlenden Produktes sicherstellt. Ferner soll dies auch unabhängig von den eingestellten Mediendrücken gewährleistet sein.The invention has for its object to provide a spray nozzle of the type mentioned, which ensures a high degree of nebulization and high uniformity of the spray regardless of the casting process or format of the product to be cooled. Furthermore, this should also be ensured regardless of the set media pressures.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass der Lufteinlass einen in die Mischkammer ragenden Bereich aufweist und dort mit mindestens einer annähernd quer zur deren Längsachse gerichteten Luftaustrittsbohrung versehen ist, während der Wassereinlass durch mindestens eine nahe der Spitze des Lufteinlasses annähernd quer zur Längsachse gerichtete Bohrung erfolgt.This object is achieved according to the invention in that the air inlet has a region projecting into the mixing chamber and is provided there with at least one air outlet bore directed approximately transversely to the longitudinal axis, while the water inlet is through at least one near the tip of the air inlet approximately transverse to the longitudinal axis directed bore ,

Wie entsprechende Versuche ergeben haben, hat diese Anordnung den Vorteil, dass sich bei ihr die Luftströmung bzw. der Luftdruck und die Wasserströmung bzw, der Wasserdruck nicht in nennenswertem Masse gegenseitig beeinflussen, so dass bei verfahrenstechnisch oder formatbedingten Veränderungen dieser Grössen der von der Sprühdüse abgegebene Kühlstrahl hinsichtlich des Vernebelungsgrades und der Gleichmässigkeit des Kühlstrahls stabil bleibt.As corresponding tests have shown, this arrangement has the advantage that in her the air flow or the air pressure and the water flow or the water pressure do not influence each other to any appreciable extent, so that in procedural or format-related changes of these sizes of votes from the spray nozzle Cooling beam remains stable with respect to the degree of atomization and the uniformity of the cooling jet.

Die Erfindung sieht ferner vor, dass der Lufteinlass des Mischkörpers durch eine in die Mischkammer ragende Blende gebildet ist, die in einer Ebene quer zu deren Längsachse mit mindestens einer umfänglich verteilt angeordneten Radialaustrittsbohrungen versehen ist. Dadurch wird die Fertigung, Zusammenbau und Wartung der Sprühdüse vereinfacht.The invention further provides that the air inlet of the mixing body is formed by a diaphragm projecting into the mixing chamber, which is provided in a plane transverse to its longitudinal axis with at least one circumferentially distributed radial outlet holes. This simplifies the manufacture, assembly and maintenance of the spray nozzle.

Es ist hierbei zweckmässig, wenn der in die Mischkammer ragende Bereich der Lufteinlassdüse einen Aussendurchmesser von weniger als die Hälfte des Innendurchmessers der Mischkammer aufweist.It is expedient here if the region of the air inlet nozzle projecting into the mixing chamber has an outer diameter of less than half the inner diameter of the mixing chamber.

Es ist für die angestrebten Wirkungsweise des Mischkörpers vorteilhaft, wenn die Radialaustrittsbohrungen quer zur Längsachse der Mischkammer einen Winkel von 90° +/- max. 15° aufweisen.It is advantageous for the desired mode of action of the mixing body when the radial outlet holes transverse to the longitudinal axis of the mixing chamber an angle of 90 ° +/- max. 15 °.

Die Lufteinlassdüse kann auch zusätzlich mit einer in Achsrichtung der Mischkammer gerichteten Luftaustrittsbohrung versehen sein.The air inlet nozzle can also be provided with a directed in the axial direction of the mixing chamber air outlet bore.

Es ist auch für die Wirkungsweise der Sprühdüse von Vorteil, wenn ihre Mischkammer zylindrisch ausgebildet ist und eine Länge von vorzugsweise zweimal der Innendurchmesser aufweist.It is also for the operation of the spray nozzle advantageous if its mixing chamber is cylindrical and has a length of preferably twice the inner diameter.

Die Erfindung sieht ebenfalls vor, dass der Mischkörper einen auswechselbaren Düsenkopf mit einer Austrittsöffnung für das Luft/Wassergemisch aufweist, deren Geometrie nach dem jeweils erforderlichen Sprühbild festlegbar ist. Auf diese Weise lässt sich die Düse leicht an variable Einsatzbedingungen anpassen.The invention also provides that the mixing body has a replaceable nozzle head with an outlet opening for the air / water mixture, the geometry of which can be fixed according to the respectively required spray pattern. In this way, the nozzle can be easily adapted to variable operating conditions.

Die Erfindung sowie weitere Vorteile derselben sind nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung näher erläutert. Es zeigen:

Fig. 1
einen erfindungsgemässen Mischkörper einer Sprühdüseneinrichtung, im Schnitt und schematisch gezeigt,
Fig. 2
die Sprühdüseneinrichtung nach Fig. 1, in einer Ansicht in Richtung des Pfeils II dargestellt,
Fig. 3
perspektivische Ansicht der Sprühdüseneinrichtung nach Fig. 1 ohne Düsenkopf,
Fig. 4
eine Seitenansicht der Sprühdüse nach Fig. 1 ohne Düsenkopf; und
Fig. 5
ein Wasserdruck- Wasserströmungsdiagramm für die Sprühdüse nach Fig. 1 mit zwei verschiedenen Werten des Luftdrucks.
The invention and further advantages thereof are explained in more detail below with reference to an embodiment with reference to the drawing. Show it:
Fig. 1
an inventive mixing body of a spray nozzle device, in section and shown schematically,
Fig. 2
the spray nozzle device after Fig. 1 , shown in a view in the direction of the arrow II,
Fig. 3
perspective view of the spray nozzle device according to Fig. 1 without nozzle head,
Fig. 4
a side view of the spray nozzle after Fig. 1 without nozzle head; and
Fig. 5
a water pressure water flow diagram for the spray nozzle after Fig. 1 with two different values of air pressure.

Die Sprühdüseneinrichtung gemäss Fig. 1 bis Fig. 4 dient zum Besprühen eines Giessstrangs mit einem Luft/Wassergemisch, um ihn während des Abgiessens abzukühlen. Der Mischkörper 1 weist eine Mischkammer 2 auf, die mit einem Lufteinlass 3, einem Wassereinlass 4 und einem Düsenauslass 5 versehen ist.The spray nozzle device according to Fig. 1 to Fig. 4 is used to spray a cast strand with an air / water mixture to cool it during casting. The mixing body 1 has a mixing chamber 2 which is provided with an air inlet 3, a water inlet 4 and a nozzle outlet 5.

Die Mischkammer 2 des Mischkörpers 1 ist zylindrisch ausgebildet. Ihre Länge beträgt ca. zweimal der Innendurchmesser der Mischkammer. Der Lufteinlass 3 ist in einer Lufteinlassdüse 6 angeordnet, deren Spitze 7 in den oberen Bereich der Mischkammer hineinragt. Die Lufteinlassdüse 6 ist koaxial zur Mischkammer 2 ausgerichtet, und ihr Aussendurchmesser ist dort kleiner als der halbe Innendurchmesser der Mischkammer. In diesem Bereich ist sie mit von dieser annähernd quer zur Längsachse der Mischkammer radial ausgehenden Luftaustrittsbohrungen 9 versehen, die umfänglich in einer Ebene quer zur Längsachse gleichmässig verteilt sind.The mixing chamber 2 of the mixing body 1 is cylindrical. Its length is about twice the inner diameter of the mixing chamber. The air inlet 3 is arranged in an air inlet nozzle 6, the tip 7 of which protrudes into the upper region of the mixing chamber. The air inlet nozzle 6 is aligned coaxially with the mixing chamber 2, and its outer diameter is smaller there than half the inner diameter of the mixing chamber. In this area, it is provided with air outlet bores 9 which extend radially from the latter approximately transversely to the longitudinal axis of the mixing chamber and which are distributed uniformly circumferentially in a plane transverse to the longitudinal axis.

Der Wassereinlass 4 mündet in die Mischkammer 2 nahe der Spitze 7 des Lufteinlasses 3 mit einer quer zu deren Längsachse gerichteten Wasseraustrittsbohrung 11, deren Abstand zur Spitze 7 so bemessen ist, dass der aus ihr strömende Wasserstrahl die Luftaustrittsbohrungen 9 nicht tangiert. Die beschriebene Sprühdüse ist mit nur einer Wasseraustrittsbohrung ausgestattet. Sie kann im Prinzip aber auch mit mehreren umfänglich verteilt angeordneten Wasseraustrittsbohrungen versehen sein.The water inlet 4 opens into the mixing chamber 2 near the tip 7 of the air inlet 3 with a directed transversely to the longitudinal axis of the water outlet hole 11 whose distance from the tip 7 is dimensioned so that the water jet flowing from it does not affect the air outlet holes 9. The described spray nozzle is equipped with only one water outlet hole. In principle, it can also be provided with a plurality of circumferentially distributed water outlet holes.

Der Wassereinlass 4 ist durch eine annähernd parallel zur Längsachse des Mischkörpers 1 verlaufenden Bohrung 11' und durch diese quere Wasseraustrittsbohrung 11 gebildet. In der Bohrung 11' ist eingangs ein auswechselbarer Filter 19 und nachfolgend eine Blende 4' enthalten und zudem ist sie mit einer Überbohrung 11" versehen, die als Verlängerung ausgehend von der queren Wasseraustrittsbohrung 11 ausgebildet ist und für eine Beruhigung des in die Wasseraustrittsbohrung 11 geleiteten Wassers dient.The water inlet 4 is formed by an approximately parallel to the longitudinal axis of the mixing body 1 extending bore 11 'and through this transverse water outlet hole 11. In the bore 11 'is initially a replaceable filter 19 and subsequently a diaphragm 4' included and also it is provided with an overbore 11 ", which is formed as an extension starting from the transverse water outlet bore 11 and for calming the guided into the water outlet hole 11 Water serves.

Ferner sind die radialen Luftaustrittsbohrungen 9 mit einem leichten Winkel zur senkrechten Ebene ausgeführt, wobei der Neigungswinkel in einem Bereich von +/- max. 15° variieren kann. Darüberhinaus könnten sie auch statt radial zumindest annähernd tangential ausgerichtet sein, wodurch eine Verwirbelung des in die Mischkammer strömenden Wasserstrahls erzeugt wird, die eine gleichmässig feinstrukturierte Vernebelung des Luft/Wassergemisches mit sich bringt.Furthermore, the radial air outlet holes 9 are designed with a slight angle to the vertical plane, wherein the inclination angle in a range of +/- max. 15 ° can vary. Moreover, they could also be oriented radially at least approximately tangentially, whereby a turbulence of the flowing into the mixing chamber water jet is generated, which brings a uniformly fine-structured nebulization of the air / water mixture with it.

Der zylindrisch ausgebildete Mischkörper 1 weist in Verlängerung der Mischkammer 2 einen ebenfalls zylindrischen Ansatz 14 auf, an dessen Ende ein auswechselbarer Düsenkopf 15 mit einer Luft/Wassergemisch-Austrittsöffnung 16 angebracht ist. Die Verbindung des Düsenkopfes 15 am Mischkörper 1 ist im Ansatz 14 des Mischkörpers angeordnet.The cylindrically shaped mixing body 1 has in extension of the mixing chamber 2 a likewise cylindrical projection 14, on whose End of a replaceable nozzle head 15 with an air / water mixture outlet opening 16 is mounted. The compound of the nozzle head 15 on the mixing body 1 is arranged in the projection 14 of the mixing body.

Statt einer solchen einwandfrei funktionierenden Schraubverbindung könnte auch ein Bajonettverschluss oder eine ähnlich lösbare Verbindung verwendbar. Durch die Auswechselbarkeit des Düsenkopfes 15 kann das Sprühbild der Düse je nach Form der einen oder mehreren Austrittsöffnungen von Fall zu Fall leicht den jeweiligen Einsatzbedingungen angepasst werden.Instead of such a properly functioning screw and a bayonet closure or a similar detachable connection could be used. Due to the interchangeability of the nozzle head 15, the spray pattern of the nozzle depending on the shape of the one or more outlet openings from case to case can be easily adapted to the respective conditions of use.

Gemäss Fig. 3 und Fig. 4 sind ferner an der unteren Stirnseite des zylindrischen Ansatzes 14 noch Zentriermittel 17 für eine Positionierung der Düsenkopfes 15 zum Mischkörper 1 angedeutet.According to FIG. 3 and FIG. 4 Furthermore centering means 17 for positioning the nozzle head 15 to the mixing body 1 are indicated on the lower end face of the cylindrical projection 14.

Beim Lufteinlass 3 und Wassereinlass 4 ist jeweils eine Blende 4' zur Drosselung der zugeführten Luft bzw. des Wassers vorgesehen.In the case of the air inlet 3 and water inlet 4, an orifice 4 'for throttling the supplied air or the water is provided in each case.

Die Vorteile der erfindungsgemässen Sprühdüse gelten selbstverständlich auch, wenn als Kühlmittel anstelle des Luft/Wassergemisches ein anderes vergleichbar geartetes Gas/Flüssigkeitsgemisch eingesetzt wird.Of course, the advantages of the spray nozzle according to the invention also apply if, as a coolant, another gas / liquid mixture of comparable type is used instead of the air / water mixture.

Sowohl die Luftaustrittsbohrungen als auch die Wassersaustrittsbohrungen können statt radial zumindest annähernd tangential ausgerichtet sein.Both the air outlet holes and the water outlet holes can be aligned instead of radially at least approximately tangentially.

Es könnte auch ein Verlängerungsrohr zwischen dem Mischkörper 1 und dem Düsenauslass 5 vorgesehen sein, wenn beispielsweise kleinere Formate von Strängen gegossen werden.An extension tube could also be provided between the mixing body 1 and the nozzle outlet 5, for example if smaller formats of strands are cast.

Bei einem Betriebsunterbruch oder Giessstopp könnte auch nur Luft durch die Sprühdüseneinrichtung zugeführt werden, um eine ausreichende Kühlung derselben zu gewährleisten.In the event of a stoppage or cessation of casting, only air could be supplied through the spray nozzle device in order to ensure sufficient cooling thereof.

Zum Ermitteln der Sprühleistung der Düse wurden Versuche mit variablen Druck- und Strömungswerten durchgeführt. Wie aus dem Diagramm gemäss Fig. 5 ersichtlich, geht aus den Versuchsergebnissen hervor, dass bei der erfindungsgemässen Sprühdüse beide Grössen sich nicht gegenseitig beeinflussen. Auf dem Diagramm sind in der x-Achse der Wasserdruck (bar) und in der y-Achse die Wasser- und Luftströmung (l/min bzw. m3/h) eingetragen. Mit den Linien 12a, 12b und 13 sind der Luftstromverlauf 1A - 2A und der Wasserstromverlauf 1B - 2B bei einem konstanten Luftdruck von 2 bar bzw. 3 bar und einer konstanten Luftströmung von 6.0 m3/h bzw. 7,8 m3/h dargestellt.To determine the spraying power of the nozzle, tests were carried out with variable pressure and flow values. As shown in the diagram Fig. 5 it can be seen from the test results that both sizes do not influence one another in the spray nozzle according to the invention. The graph shows the water pressure (bar) in the x-axis and the water and air flow (l / min or m 3 / h) in the y-axis. With the lines 12a, 12b and 13, the air flow course 1A-2A and the water flow course 1B-2B are at a constant air pressure of 2 bar or 3 bar and a constant air flow of 6.0 m 3 / h and 7.8 m 3 / h shown.

Bei den Versuchen wurden folgende Druck- und Strömungswerte festgestellt: Beispiel Luftdruck Wasserdruck Luftström. Wasserström. 1 2 bar 0,5 bar 1A-2A: 6,0 m2/h 1B: 0,8 l/min 2 2 bar 8,0 bar 1A-2A: 6,0 m3/h 2B: 3,4 l/min 3 bar 0,5 bar 7,8 m3/h 1B: 0,8 l/min 3 bar 8,0 bar 7,8 m3/h 2B: 3,4 l/min The following pressure and flow values were determined during the tests: example air pressure water pressure Air stream. Wasserström. 1 2 bar 0.5 bar 1A-2A: 6.0 m 2 / h 1B: 0.8 l / min 2 2 bar 8.0 bar 1A-2A: 6.0 m 3 / h 2B: 3.4 l / min 3 bar 0.5 bar 7.8 m 3 / h 1B: 0.8 l / min 3 bar 8.0 bar 7.8 m 3 / h 2B: 3.4 l / min

Aus der Tabelle ist zu entnehmen, dass der Kurvenverlauf 1B-2B der Wasserströmung bei Steigerung des Luftdrucks von 2 auf 3 bar bzw. bei Anhebung der Luftströmung von 6,0 auf 7,8 m3/h konstant bleibt. Die erfindungsgemässe Sprühdüse gewährleistet damit eine gleichmässig homogene Beschaffenheit des Luft/Wassergemisches, unabhängig der jeweils geforderten Kühlwirkung. Es besteht somit eine gegenseitige Unabhängigkeit Ober einen grossen Druckbereich des Luft- bzw. Wasserdruckes.From the table it can be seen that the curve 1B-2B of the water flow remains constant with increase of the air pressure from 2 to 3 bar or with increase of the air flow from 6.0 to 7.8 m 3 / h. The spray nozzle according to the invention thus ensures a uniform homogeneous composition of the air / water mixture, regardless of the respective required cooling effect. There is thus a mutual independence Ober a large pressure range of the air or water pressure.

Claims (12)

Sprühdüseneinrichtung insbesondere zum Besprühen eines Giessstrangs, mit einem eine diffusorartig wirkende Mischkammer (2) aufweisenden Mischkörper, der mit einem Lufteinlass (3), einem Wassereinlass (4) und einer auf der zum Lufteinlass (3) gegenüberliegenden Seite angeordneten Düsenauslass (5) versehen ist, durch welchen ein Luft/Wassergemisch austritt, dadurch gekennzeichnet, dass der Lufteinlass (3) einen in die Mischkammer (2) ragenden Bereich aufweist und dort mit mindestens einer annähernd quer zur deren Längsachse gerichteten Luftaustrittsbohrung (9) versehen ist, während der Wassereinlass (4) durch mindestens eine nahe der Spitze (7) des Lufteinlasses (3) annähernd quer zur Längsachse gerichtete Bohrung (11) erfolgt.Spray nozzle device, in particular for spraying a casting strand, with a mixing body having a diffuser-like mixing chamber (2), which is provided with an air inlet (3), a water inlet (4) and a nozzle outlet (5) on the side opposite the air inlet (3) through which an air / water mixture emerges, characterized in that the air inlet (3) has a region projecting into the mixing chamber (2) and is provided there with at least one air outlet bore (9) directed approximately transversely to its longitudinal axis, while the water inlet (3) 4) by at least one near the tip (7) of the air inlet (3) approximately transversely to the longitudinal axis directed bore (11). Sprühdüseneinrichtung nach Anspruch 1,
dadurch gekennzeichnet, dass
der Lufteinlass (3) durch eine in die Mischkammer (2) ragende Lufteinlassdüse (6) gebildet ist, die in einer Ebene quer zur Längsachse mit der mindestens einen umfänglich verteilt angeordneten Luftaustrittsbohrung (9) versehen ist.Spray nozzle device according to claim 1,
characterized in that
the air inlet (3) is formed by an air inlet nozzle (6) projecting into the mixing chamber (2), which is provided with the at least one circumferentially distributed air outlet bore (9) in a plane transverse to the longitudinal axis. Sprühdüseneinrichtung nach Anspruch 2,
dadurch gekennzeichnet, dass
der in die Mischkammer (2) ragende Bereich der Lufteinlassdüse (6) einen Aussendurchmesser von weniger als die Hälfte des Innendurchmessers der Mischkammer (2) aufweist.Spray nozzle device according to claim 2,
characterized in that
the region of the air inlet nozzle (6) projecting into the mixing chamber (2) has an outer diameter of less than half the inner diameter of the mixing chamber (2). Sprühdüseneinrichtung nach Anspruch 2 oder 3,
dadurch gekennzeichnet, dass
die Mischkammer (2) zylindrisch ausgebildet ist und eine annähernd zweifache Länge gegenüber ihres Innendurchmessers aufweist.Spray nozzle device according to claim 2 or 3,
characterized in that
the mixing chamber (2) is cylindrical and has an approximately twice the length relative to its inner diameter. Sprühdüseneinrichtung nach einem der Ansprüche 2 bis 4,
dadurch gekennzeichnet, dass
die Luftaustrittsbohrungen (9) quer zur Längsachse der Mischkammer (2) einen Winkel von 90° +/- max. 15° aufweisen, wobei die mindestens eine Wasseraustrittsbohrung (11) so plaziert ist, dass der aus ihr austretende Wasserstrahl an den Luftaustrittsbohrungen (9) vorbeiströmtSpray nozzle device according to one of claims 2 to 4,
characterized in that
the air outlet holes (9) transverse to the longitudinal axis of the mixing chamber (2) an angle of 90 ° +/- max. 15 °, wherein the at least one water outlet bore (11) is placed so that the water jet emerging from it flows past the air outlet holes (9) Sprühdüseneinrichtung nach einem der Ansprüche 2 bis 5,
dadurch gekennzeichnet, dass
die Luftaustrittsbohrungen (9) in der Ebene quer zur Längsachse der Mischkammer (2) fächerförmig abgewinkelt sind.Spray nozzle device according to one of claims 2 to 5,
characterized in that
the air outlet holes (9) in the plane transverse to the longitudinal axis of the mixing chamber (2) are fan-shaped angled. Sprühdüseneinrichtung nach einem der Ansprüche 2 bis 6,
dadurch gekennzeichnet, dass
die Lufteinlassdüse (6) zusätzlich mit einer in Achsrichtung der Mischkammer (2) gerichteten Luftaustrittsbohrung (8) versehen ist.Spray nozzle device according to one of claims 2 to 6,
characterized in that
the air inlet nozzle (6) is additionally provided with an air outlet bore (8) directed in the axial direction of the mixing chamber (2). Sprühdüseneinrichtung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, dass
der Düsenauslass (5) einen auswechselbaren Düsenkopf (15) mit einer Austrittsöffnung (16) für das Luft/Wassergemisch aufweist, deren Geometrie nach dem jeweils erforderlichen Sprühbild festlegbar ist.Spray nozzle device according to one of claims 1 to 7,
characterized in that
the nozzle outlet (5) has a replaceable nozzle head (15) with an outlet opening (16) for the air / water mixture, the geometry of which can be determined according to the respectively required spray pattern. Sprühdüseneinrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, dass
ein Verlängerungsrohr zwischen dem Mischkörper (1) und dem Düsenauslass (5) vorgesehen ist.Spray nozzle device according to one of claims 1 to 8,
characterized in that
an extension tube is provided between the mixing body (1) and the nozzle outlet (5). Sprühdüseneinrichtung nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, dass
beim Wassereinlass (4) und Lufteinlass (3) je eine Blende (4') zur Drosselung des zugeführten Wassers bzw. der Luft vorgesehen ist.Spray nozzle device according to one of claims 1 to 9,
characterized in that
at the water inlet (4) and the air inlet (3) is provided in each case a diaphragm (4 ') for throttling the supplied water or the air. Sprühdüseneinrichtung nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet, dass
der Wassereinlass (4) durch eine annähernd parallel zur Längsachse des Mischkörpers (1) verlaufenden Bohrung (11') und durch diese quere Wasseraustrittsbohrung (11) gebildet ist, wobei in der Bohrung (11') eine Blende (4') enthalten ist.Spray nozzle device according to one of claims 1 to 10,
characterized in that
the water inlet (4) is formed by an approximately parallel to the longitudinal axis of the mixing body (1) extending bore (11 ') and through this transverse water outlet bore (11), wherein in the bore (11') an aperture (4 ') is included. Sprühdüseneinrichtung nach Anspruch 11,
dadurch gekennzeichnet, dass
die Bohrung (11') mit einer als Verlängerung ausgehend von der queren Wasseraustritfisbohrung (11) vorgesehenen Überbohrung (11") versehen ist, die für zur Beruhigung des in die Wasseraustrittsbohrung (11) geleiteten Wassers dient.Spray nozzle device according to claim 11,
characterized in that
the bore (11 ') is provided with an overbore (11 ") provided as an extension starting from the transverse Wasseraustritfisbohrung (11), which serves for calming the guided into the water outlet bore (11) water.
EP12005888.8A 2012-08-15 2012-08-15 Spray nozzle device, in particular for spraying a cast strand Active EP2698210B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP12005888.8A EP2698210B1 (en) 2012-08-15 2012-08-15 Spray nozzle device, in particular for spraying a cast strand
BR112015003028A BR112015003028A2 (en) 2012-08-15 2013-08-13 spray nozzle device, in particular for spraying long bars
US14/620,275 US10286446B2 (en) 2012-08-15 2013-08-13 Spray nozzle device, in particular for spraying a cast strand
KR20157003906A KR20150042208A (en) 2012-08-15 2013-08-13 Spray nozzle device, in particular for spraying a cast strand
CN201380042934.5A CN104520012B (en) 2012-08-15 2013-08-13 Spray nozzle device, in particular for spraying a cast strand
RU2015107120A RU2015107120A (en) 2012-08-15 2013-08-13 CONSTRUCTION OF THE SPRAY NOZZLE, IN PARTICULAR, FOR SPRAYING THE CASTING CONTINUOUS PREPARATION
PCT/EP2013/066923 WO2014026992A2 (en) 2012-08-15 2013-08-13 Spray nozzle device, in particular for spraying a cast strand

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12005888.8A EP2698210B1 (en) 2012-08-15 2012-08-15 Spray nozzle device, in particular for spraying a cast strand

Publications (2)

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EP2698210A1 true EP2698210A1 (en) 2014-02-19
EP2698210B1 EP2698210B1 (en) 2020-01-01

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US (1) US10286446B2 (en)
EP (1) EP2698210B1 (en)
KR (1) KR20150042208A (en)
CN (1) CN104520012B (en)
BR (1) BR112015003028A2 (en)
RU (1) RU2015107120A (en)
WO (1) WO2014026992A2 (en)

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CN107649879A (en) * 2017-11-20 2018-02-02 湖州织里川蜀机械有限公司 A kind of novel double-end drilling tapping machine
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US10286446B2 (en) 2019-05-14
EP2698210B1 (en) 2020-01-01
US20150231694A1 (en) 2015-08-20
RU2015107120A (en) 2016-10-10
CN104520012A (en) 2015-04-15
CN104520012B (en) 2021-03-30
BR112015003028A2 (en) 2017-07-04
WO2014026992A3 (en) 2014-04-10
KR20150042208A (en) 2015-04-20
WO2014026992A2 (en) 2014-02-20

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