EP1767277B1 - Buse à jet conique plein - Google Patents

Buse à jet conique plein Download PDF

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Publication number
EP1767277B1
EP1767277B1 EP06015293A EP06015293A EP1767277B1 EP 1767277 B1 EP1767277 B1 EP 1767277B1 EP 06015293 A EP06015293 A EP 06015293A EP 06015293 A EP06015293 A EP 06015293A EP 1767277 B1 EP1767277 B1 EP 1767277B1
Authority
EP
European Patent Office
Prior art keywords
outlet
spray nozzle
chamber
nozzle according
solid cone
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.)
Active
Application number
EP06015293A
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German (de)
English (en)
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EP1767277A3 (fr
EP1767277A2 (fr
Inventor
Michael Lipthal
Markus Astfalk
Lars Vater
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.)
Lechler GmbH
Original Assignee
Lechler GmbH
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Filing date
Publication date
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Publication of EP1767277A2 publication Critical patent/EP1767277A2/fr
Publication of EP1767277A3 publication Critical patent/EP1767277A3/fr
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Publication of EP1767277B1 publication Critical patent/EP1767277B1/fr
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Classifications

    • 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
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • 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
    • 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
    • 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
    • B05B1/048—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 having a flow conduit with, immediately behind the outlet orifice, an elongated cross section, e.g. of oval or elliptic form, of which the major axis is perpendicular to the plane of the jet
    • 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

Definitions

  • the invention relates to a Vollkegelsprühdüse, in particular for spraying low-viscosity liquids for cooling in billet or Vorblockstranggussanlagen, with a mouthpiece, with an outlet chamber and an outgoing from the outlet chamber outlet opening with a smaller cross-section than the outlet chamber.
  • a mouthpiece of this nozzle has an outlet chamber with an outlet opening extending from the outlet chamber with a smaller cross section than the outlet chamber.
  • a swirl insert is arranged, with which the gas-liquid mixture is rotated before reaching the outlet opening in rotation, so that it can then emerge conically under pressure from the mouthpiece.
  • the swirl insert has several holes or circumferentially arranged Milled on, which are evenly distributed over the circumference.
  • a mixing chamber is provided upstream of the swirl insert and optionally separated by an extension tube from the mouthpiece in which a gas flow and a liquid flow are perpendicular to each other and thereby mixed. Due to the pronounced rotation of the gas-liquid mixture before reaching the outlet opening, other than circular spray cone shapes can not be satisfactorily molded.
  • a slot nozzle is provided for cooling in continuous casting plants.
  • an oval spray cone shape is to be achieved.
  • a mouthpiece has an outlet chamber with an outlet opening, which has a smaller cross section than the outlet chamber, wherein the outlet opening has an oval cross section.
  • a transverse web is arranged in the outlet chamber, which leaves free on both sides only in each case a circular segment-shaped inlet opening, which are arranged symmetrically to the center of the outlet chamber.
  • the wall of the outlet chamber is formed in the region of the outlet opening so that the liquid streams meet at or immediately before the outlet opening, in a range between 60 ° and 130 °.
  • This atomizing nozzle has a nozzle tip with a chamber arranged therein. At the upstream end of the chamber an inlet opening is provided, at its downstream end an outlet opening. Upstream of the outlet opening, a deflection pin is arranged in the chamber.
  • cooling nozzles Due to the larger roller spacing, several cooling nozzles must be used in part to cool the entire space between two spaced guide rollers. This results in a given amount of water to be applied to smaller nozzle cross-sections and thereby increased risk of clogging. If the space between two guide rollers is not completely covered by a spray jet, the strand shell of the continuous casting product may be reheated in the area not covered by the spray jet, which may result in cracks in the strand shell.
  • spray nozzles with an oval spray cone would therefore be desirable in order to be able to completely cover the surface of the continuous casting product in the space between two guide rollers with a single spray nozzle and at the same time to spray essentially only the continuous casting product itself in the transverse direction of the continuous casting product.
  • a Vollkegelsprühdüse in particular for spraying low viscosity liquids for cooling in billet or Vorblockstranggussanlagen be created in which a homogeneous liquid distribution is realized with low constipation sensitivity.
  • a Vollkegelsprühdüse in particular for spraying low viscous fluids for cooling in billet or Vorblockstranggussanlagen, provided with a mouthpiece with an outlet chamber and an outgoing from the outlet chamber outlet opening with a smaller cross-section than the outlet chamber, wherein an inlet opening into the outlet chamber has a smaller cross-section than the outlet chamber and at the downstream of the inlet opening in the outlet chamber a web-like Vorzerstäuberelement is arranged, on which a fluid jet after entering the outlet chamber at least partially impinges, wherein the inlet opening is provided in a diaphragm, which is inserted into a mouthpiece housing is, the web-like Vorzerstäuberelement is provided on a U-bracket, which is inserted into the mouthpiece housing, wherein the aperture and the U-bracket provided on a one-piece insert part sin d.
  • the web-like Vorzerstäuberelement on the one hand prevents the penetration of an incoming fluid flow to the outlet opening and on the other hand ensures a thorough rupture of the fluid jet. Since no pronounced rotation of the fluid jets occurs in the exit chamber, can not be generated circular cross-sectional shapes of a full cone beam with uniform distribution. This results in a uniform distribution of fluid in the spray cone at malleable cross-section of the spray cone, and at the same time large passage cross-sections are achieved in the spray nozzle, which ensure a low risk of clogging.
  • the fluid jet enters the outlet chamber parallel to a longitudinal axis of the nozzle and also the outlet opening lies in the longitudinal axis of the nozzle.
  • the size of the inlet opening can be changed by replacing the aperture, for example, to tune the spray nozzle to the intended use.
  • a distance between Vorzerstäuberelement and inlet opening and outlet opening can be changed by replacing the U-bracket to adapt the nozzle to a designated purpose.
  • the nozzle can be constructed of a few and in particular only two items, namely the mouthpiece housing with the outlet chamber and the outlet opening and the insert with the aperture with the inlet opening and the U-bracket with the pre-atomizing element.
  • the mouthpiece housing with the outlet chamber and the outlet opening and the insert with the aperture with the inlet opening and the U-bracket with the pre-atomizing element In addition, an exact distance between Vorzerstäuberelement and inlet opening can be ensured.
  • a sudden cross-sectional widening of a flow channel is provided at the transition of the inlet opening into the outlet chamber.
  • the inlet opening is provided in a diaphragm and has a radius of 2.5 mm.
  • the outlet chamber may then have, for example, a radius of about 6 mm, whereby even with a smaller cross-sectional widening, for example only to twice, a sufficient effect can occur.
  • a determination of the output fluid volume flow takes place by means of the cross section of the inlet opening.
  • the inlet opening is provided within a diaphragm, so that a different fluid volume flow can be realized by replacing the diaphragm.
  • the spray cone is shaped by means of the outlet opening and optionally by means of an outlet cone adjoining the outlet opening.
  • the exit cone or exit truncated cone in the mouthpiece housing can have an arbitrarily shaped, deviating from the circular shape cross-sectional shape. Since in the nozzle according to the invention, the rupture and atomization of an incoming fluid jet in the pre-atomizer and the outlet chamber, the shape of the outlet opening can be changed without a liquid distribution within the spray cone to change fundamentally by changing the shape of the outlet opening.
  • the outlet opening has an oval cross-sectional shape and, advantageously, an expanding outlet cone with an oval cross-section adjoins the outlet opening in the outlet direction.
  • an oval or oval shape is understood to mean an ellipse-like shape, but beyond that also an oval shape in the strict sense, that is to say two semicircles interconnected by straight lines.
  • the web-like Vorzerstäuberelement extends with its longitudinal direction substantially perpendicular to an incoming fluid jet through the outlet chamber, wherein the longitudinal direction relative to a longer axis of the oval outlet opening at an angle between 0 ° and 360 °, in particular 90 °, is arranged ,
  • the pre-atomizing element can be arranged in different angular positions relative to a longitudinal axis of the outlet opening.
  • an arrangement of the web-like pre-atomizing element has proven to be particularly advantageous at an angle of 90 ° to the longer axis of the oval outlet opening.
  • the outlet chamber has an oval cross-section in a plane perpendicular to the outlet direction.
  • Such an oval shape of the outlet chamber can serve, for example, to enable insertion of the pre-atomizing element in only one, predefined position.
  • a longitudinal axis of such an oval outlet chamber may be arranged parallel or perpendicular to the longer axis of an oval outlet opening.
  • the Vorzerstäuberelement is designed as a web with rechteckartigem cross section, wherein a narrow side of the rectangle faces the inlet opening.
  • the narrow side of the rectangle thereby forms an impact surface for at least part of the fluid jet entering through the inlet opening. If the narrow side is narrower than the inlet opening, an incoming fluid jet is divided into three partial streams. A first partial flow impinges on the pre-atomizer element, two further partial flows pass through the pre-atomizer element on the right or left side.
  • the Vorzerstäuberelement can be as wide as the inlet opening, so that then no division into partial beams takes place but the entire incoming fluid jet impinges on the Vorzerstäuberelement.
  • the web-like pre-atomizing element is designed as a round rod extending transversely through the outlet chamber.
  • a round rod can be inserted and fixed by providing a simple bore in the mouthpiece housing in this.
  • an impact surface facing the inlet opening of the web-like pre-atomizing element is curved outwardly toward the inlet opening, is flat or formed as an inner surface of a depression in the pre-atomizing element.
  • the recess may have a conical shape or a spherical shape.
  • the outlet opening is arranged in a chamber bottom of the outlet chamber, wherein the inner walls of the outlet chamber meet in an imaginary center of the outlet opening at an angle which is between 140 ° and 180 °, in particular between 170 ° and 180 °.
  • Such a design of the chamber base contributes to a uniform fluid distribution in the spray jet and to a formability of the spray jet cross section by changing the shape of the outlet opening.
  • the chamber bottom can be spherical or flat and the side walls of the outlet chamber can be arranged perpendicular to the flat chamber bottom or at an angle of less than 90 ° on the flat chamber bottom.
  • the side walls may be curved or straight in a sectional view.
  • the chamber bottom is formed by displacing a drill or milling cutter, in particular a ball-shaped drill bit, in at least one lateral direction.
  • a mixing chamber for liquid and gas is provided upstream of the inlet chamber.
  • the mixing chamber may be formed perpendicular to a gas flow for entry of a liquid flow, wherein a flow direction from the mixing chamber to the mouthpiece is substantially perpendicular to the direction of entry of the liquid flow into the mixing chamber.
  • an extension tube is provided between the mixing chamber and mouthpiece.
  • FIG. 1 shows a spray nozzle 10 according to the invention with a one-piece mouthpiece housing 12.
  • an outlet cone 14 can be seen, which is connected to an in Fig. 1 unrecognizable, oval outlet opening connects.
  • the exit cone 14 has a basically also oval cross-sectional shape, this being in the view of Fig. 1 can not be readily seen and cut through the provided at the transition of the end face to the side surface of the mouthpiece housing 12 bevel 16 and the lateral ends of the exit cone.
  • the mouthpiece housing 12 is generally cylindrical in shape and has a peripheral flange 18 at its rear end for connection to a fluid supply line.
  • the flange 18 is laterally provided with flats 20, wherein in the view of Fig. 1 only one flattening can be seen, but the opposite similar flattening is hidden.
  • Fig. 1 is a spray cone generated by the spray nozzle 10 indicated by dashed lines. As can be seen, this spray cone has a uniform, oval shape.
  • Fig. 2 In the sectional view of Fig. 2 is the mouthpiece housing 12 and realized by a bore in the mouthpiece housing 12 outlet chamber 22 can be seen.
  • An oval or elliptical outlet opening 24 is arranged at a front end of the outlet chamber 22 and merges into the outlet cone 14.
  • an inlet opening 26 is provided at one of the outlet opening 24 opposite end of the outlet chamber 22, at one of the outlet opening 24 opposite end of the outlet chamber 22, at one of the outlet opening 24 opposite end of the outlet chamber 22, an inlet opening 26 is provided.
  • the inlet opening 26 has a circular cross section and is realized by means of a bore in an insert part 28 which is inserted into the outlet chamber 22.
  • the insert member 28 has an annular aperture 30 in which the inlet opening 26 is provided, and a U-like bracket 32 which extends from the annular aperture 30 and hineinerstreckt toward the outlet opening 24 into the outlet chamber 22.
  • a transverse web 34 is provided on the insert part 28.
  • the crosspiece 34 forms a pre-atomizing element, on which a fluid jet entering through the inlet opening 26 impinges.
  • FIG. 3 The perspective view of Fig. 3 also shows the spray nozzle 10 of Fig. 1 , wherein on and by themselves not visible parts are shown in dashed lines. It is in Fig. 3 to recognize that the U-bracket 32 of the insert member 28 has only a small thickness, so that, seen in the inlet direction, on both sides of the U-bracket 32 areas of the outlet chamber 22 are free, in which a fluid flow can propagate.
  • a fluid jet entering through the circular inlet opening 26 thus impinges on the transverse web 34 and is thereby divided into three partial streams.
  • a first partial flow is torn open by the impact on the transverse web 34.
  • a second and third partial flow respectively pass right and left past the crossbar 34 into the outlet chamber 22.
  • FIG. 3 is further to recognize the shape of the outlet chamber 22, which results from lateral displacement of a ball drill.
  • a base of the outlet chamber 22 surrounding the outlet opening 24 is thus constructed from two quarter-spherical surface segments and a half cylinder surface segment arranged between them. At an imaginary center of the outlet opening 24, the side walls of the outlet chamber 22 thus abut each other at an angle of 0 °.
  • the atomization effect in the nozzle according to the invention is not achieved by the collision of liquid jets in the region of the outlet opening, but that the atomization of the incoming fluid jets already occurs after passing through the diaphragm 30 or when hitting the transverse web 34 of Vorzerstäuberelements ,
  • the design of the chamber bottom is therefore of minor importance in the nozzle according to the invention for the function of the nozzle, but the design of the chamber bottom can of course affect the liquid distribution within the spray cone produced.
  • FIG. 4 shows the mouthpiece housing 12 of the spray nozzle the Fig. 1 from the side of the outlet opening 24. Good to see in this view, the oval or ellipse-like shape of the outlet opening 24. Also extending away from the outlet opening outwardly also oval cross-sectional shape of the outlet cone 14 is in the Fig. 4 clearly visible.
  • the exit cone 14 and the outlet opening 24 can For example, be formed by cutting with a suitable cutter in the mouthpiece housing 12.
  • FIG. 5 In the side view of Fig. 5 the cylindrical outer shape of the mouthpiece housing 12 can be seen.
  • the in and of itself not visible outlet chamber 22 is in Fig. 5 indicated by dashed lines.
  • the outlet chamber 22 faces the observer with its narrow side.
  • the outlet opening 24 and the outlet cone 14 are in the illustration of Fig. 5 on the other hand, with their broad side facing the viewer. It is thus to be noted that the longitudinal axis of the oval cross section of the outlet chamber 22 and the longitudinal axis of the oval or elliptical outlet opening 24 and the outlet cone 14 are arranged perpendicular to each other.
  • FIG. 6 shows a section along the line VI-VI in Fig. 5 , In this view, the wider side of the exit chamber 22 faces the viewer. Because of that go in the view of Fig. 6 the side walls of the outlet chamber 22 flush in the side walls of the input bore 38 via.
  • the insert 28, which is in Fig. 2 is thus only on a portion of its circumference on the paragraphs 36 on.
  • Fig. 7 shows the mouthpiece housing 12 from the side of the input bore 38 forth. Good to see is the arrangement of the oval in cross-section outlet chamber 22 with its longer axis perpendicular to the longer axis of the oval or elliptical outlet opening 24. Together with Fig. 2 and Fig. 7 It can be seen that the insert member 28 is inserted into the outlet chamber 22, that the aperture 30 rests on the shoulders 36 and then the transverse web 34 extends parallel to the longer axis of the outlet chamber 22 and thus perpendicular to the longer axis of the outlet opening 24. Due to the oval cross-section of the outlet chamber 22, the insert part 28 can be inserted into the mouthpiece housing 12 in only two positions rotated by 180 °.
  • FIG. 8 shows the insert 28 of the Fig. 2 detail. It can be seen that the insert part 28 is constructed in one piece and, for example, from a cylinder which has been milled in sections on both sides. A bore parallel to the longitudinal axis of this cylinder forms the inlet opening 26 and allows the U-bracket 32 and the transverse web 34 arise. Of course, the machining operations can also be reversed, so that only the bore is introduced and then segments of the cylinder are milled.
  • a drill bit with a conical tip was used, so that a baffle surface 40, which forms a side face of the transverse web 34 facing the inlet opening 26, is provided with a conical section-shaped depression.
  • This depression of the baffle 40 serves to control the rupture of the impact beam impinging on the transverse web 34.
  • it can be provided, for example, a spherical segment-shaped depression, a flat baffle or a to the inlet opening 26 outwardly curved baffle.
  • the insert 28 of Fig. 8 ensures a precise distance between the baffle 40 of the transverse web 34 and the inlet opening 26. Since the insert member 28 is merely inserted into the mouthpiece housing 12, the spray behavior of the nozzle can be changed by simply replacing the insert member 28.
  • FIG. 9 shows an insert 42 according to an alternative embodiment.
  • the insert 42 has a transverse web 44 with respect to the rest of the U-bracket lesser thickness.
  • FIG. 10 Another alternative embodiment shows the perspective view of Fig. 10 ,
  • the insert member 46 here has a U-bracket, which has a reduced width in the region of the transverse web, so that in each case a gap remains between the right and the left end of the transverse web 48 and the inner wall of the outlet chamber. This can also influence the spray pattern of the spray nozzle according to the invention.
  • FIG. 11 shows a further embodiment of an insert member 48.
  • the thickness of a crosspiece 50 decreases in the direction away from the inlet opening, so that a cross-piece like crosspiece 50 is formed.
  • FIG. 12 shows a further embodiment of an insert member 52.
  • a cross bar 54 is formed here on its, the inlet opening facing away in the aperture side rounded and the inlet opening facing the baffle 56 is rectangular and flat.
  • FIG. 13 shows a possible alternative embodiment of a mouthpiece housing 58.
  • a chamber bottom 60 is here just formed and the side walls of an outlet chamber 62 run at an angle of less than 90 ° to the flat chamber base 60 to.
  • the mouthpiece housing 58 can be made, for example, by laterally displacing a so-called offset drill, that is, a drill having curved tip surfaces.
  • FIG. 14 shows a further alternative embodiment of a mouthpiece housing 64.
  • a chamber bottom 66 is flat and the side walls of an outlet chamber 68 run at right angles to the flat chamber bottom 66.
  • Fig. 15 In the side view of Fig. 15 is the spray nozzle 10 of Fig. 1 attached to a mixing chamber housing 70.
  • the mouthpiece housing 12 is fastened here by means of a union nut 72 to an external thread of the mixing chamber housing 70.
  • the mixing chamber housing 70 has a first inlet 74 for liquid, for example water and a second inlet 76 for gas, for example compressed air.
  • a water jet is introduced transversely to a longitudinal axis of a mixing chamber 78 and on a, the inlet nozzle opposite side of the mixing chamber 38 is a conical baffle provided.
  • Compressed air is introduced into the mixing chamber 78 through the connection 76 at a right angle to the liquid jet, so that intimate mixing between gas and liquid occurs in the mixing chamber and enters the mouthpiece housing 12 as a fluid mixture.
  • the fluid mixture then passes through the inlet opening in the panel of the insert and a part of the fluid jet impinges on the crosspiece of the insert part. Due to the abrupt cross-sectional widening at the transition from the diaphragm into the outlet chamber, the incoming fluid jet is torn open. Finally, the swirling fluid then exits the outlet opening 24.
  • the spray nozzle 10 according to the invention is in the embodiment of the FIGS. 15 and 16 thus operated as Zweistoffsprühdüse, but it is equally suitable as Einstoffsprühdüse.
  • a fluid volume flow through the outlet opening 24 is determined in the spray nozzle 10 according to the invention by the size of the inlet opening in the aperture of the insert part.
  • the outlet opening 24 and the exit cone 24 adjoining the outlet opening 14 are then responsible for the formation of the spray cone.
  • the spray nozzle according to the invention can therefore be produced with different shapes of outlet openings and outlet cones, so that the spray cone shape required for an intended application can be realized. Since the output fluid volume flow is determined by the inlet opening in the diaphragm, such an adaptation of the shape of the outlet opening does not lead to a change in the dispensed fluid volume flow. Conversely, the output fluid volume flow can be adjusted by changing the aperture without significantly changing the shape of the dispensed spray cone.
  • the spray nozzle 10 according to the invention has large passage cross-sections and is therefore less susceptible to clogging.
  • the full spray cone with an oval cross-section produced at the spray nozzle 10 is generated by means of a single outlet opening 24 and also the aperture has a single inlet opening which is thus large in cross-section.
  • FIG. 17 shows a further embodiment of a non-inventive spray nozzle 80.
  • the spray nozzle 80 has an oval Outlet opening 82 and an outlet chamber 84 with an oval cross section.
  • a longer axis of the oval exit chamber 84 is disposed perpendicular to a longer axis of the oval exit opening 82.
  • a round rod 86 is arranged in the outlet chamber 84.
  • the round rod 86 serves as Vorzerstäuberelement and is inserted into a bore which passes through a mouthpiece housing 88.
  • an annular aperture 90 is inserted with a central inlet opening.
  • a jet of fluid passes through the inlet 92 and impinges on the rod 86. Due to the impact and the abrupt cross-sectional widening at the transition from the aperture 90 into the outlet chamber 84, the incoming fluid jet is torn open, so that after discharge through the outlet opening 82 a full spray cone with an oval cross-sectional shape can be produced.
  • the spray nozzle 80 is little clogging sensitive and easy to manufacture, since the round rod 86 and the aperture 90 can be produced as a simple turned parts.
  • FIG. 18 shows the spray nozzle 10 of Fig. 15 who is also in there Fig. 15 shown mixing chamber housing 70 is connected upstream. Between mixing chamber housing 70 and spray nozzle 10, an extension tube 92 is arranged. By means of the extension tube 92, the spray nozzle can be arranged in tight spaces close to the intended spray point, for example between guide rollers of a continuous casting plant.

Claims (20)

  1. Buse à jet conique plein, en particulier pour pulvériser des liquides peu visqueux pour le refroidissement dans des installations de coulée continue de billettes ou de blooms, pourvue d'un bec avec une chambre d'éjection (22 ; 62 ; 68 ; 84) et un orifice de sortie (24 ; 82) partant de la chambre d'éjection (22 ; 62 ; 68 ; 84) présentant une coupe transversale plus petite que la chambre d'éjection (22 ; 62 ; 68 ; 84), sachant qu'un orifice d'entrée (26) dans la chambre d'éjection (22 ; 62 ; 68 ; 84) présente une coupe transversale plus petite que la chambre d'éjection (22 ; 62 ; 68 ; 84) et qu'est disposé en aval de l'orifice d'entrée (26), dans la chambre d'éjection (22 ; 62 ; 68 ; 84), un élément de prépulvérisation (34 ; 44 ; 48 ; 50 ; 54 ; 86) en forme de barre sur lequel un jet de fluide est projeté au moins en partie après être entré dans la chambre d'éjection (22 ; 62 ; 68 ; 84), sachant que l'orifice d'entrée (26) est prévu dans un obturateur (30) placé dans un boîtier de bec (12) et que l'élément de prépulvérisation (34 ; 44 ; 48 ; 50 ; 54) en forme de barre est prévu sur un étrier en U (32) placé dans le boîtier de bec (12), caractérisée en ce que l'obturateur (30) et l'étrier en U (32) sont prévus sur une pièce d'insertion (28 ; 42 ; 46 ; 49 ; 52) en une seule partie.
  2. Buse à jet conique plein selon la revendication 1, caractérisée en ce qu'un élargissement brusque de la coupe transversale d'un canal d'écoulement est prévu sur le passage de l'orifice d'entrée (26) dans la chambre d'éjection (22 ; 62 ; 68 ; 84).
  3. Buse à jet conique plein selon la revendication 1 ou 2, caractérisée en ce que le débit volumétrique de fluide délivré est déterminé au moyen de la coupe transversale de l'orifice d'entrée (26).
  4. Buse à jet conique plein selon au moins l'une des revendications précédentes, caractérisée en ce que le cône de pulvérisation est façonné au moyen de l'orifice de sortie (24 ; 82) et, le cas échéant, au moyen d'un cône de sortie (14) rattaché à l'orifice de sortie (24 ; 82).
  5. Buse à jet conique plein selon au moins l'une des revendications précédentes, caractérisée en ce que l'orifice de sortie (24 ; 82) présente une coupe transversale ovale.
  6. Buse à jet conique plein selon la revendication 5, caractérisée en ce qu'un cône de sortie (14) s'élargissant et présentant une coupe transversale ovale se rattache à l'orifice de sortie (24 ; 82) dans la direction de sortie.
  7. Buse à jet conique plein selon la revendication 5 ou 6, caractérisée en ce que l'élément de prépulvérisation (34 ; 44 ; 48 ; 50 ; 54 ; 86) en forme de barre s'étend dans sa direction longitudinale pour l'essentiel perpendiculairement au jet de fluide entrant, à travers la chambre d'éjection (22 ; 62 ; 68 ; 84), sachant que la direction longitudinale est disposée, par rapport à un axe le plus long de l'orifice de sortie (24 ; 82) ovale, à un angle compris entre 0° et 360° , en particulier de 90°.
  8. Buse à jet conique plein selon au moins l'une des revendications précédentes, caractérisée en ce que la chambre d'éjection (22 ; 62 ; 68 ; 84) présente une coupe transversale ovale sur un plan perpendiculaire à la direction de sortie.
  9. Buse à jet conique plein selon au moins l'une des revendications précédentes, caractérisée en ce que l'élément de prépulvérisation (34 ; 44 ; 48 ; 50 ; 54) en forme de barre est conçu sous forme de barre présentant une coupe transversale rectangulaire, sachant qu'un petit côté du rectangle est tourné vers l'orifice d'entrée (26).
  10. Buse à jet conique plein selon au moins l'une des revendications 1 à 8, caractérisée en ce que l'élément de prépulvérisation en forme de barre est conçu comme une barre ronde (86) s'étendant à travers la chambre d'éjection (84).
  11. Buse à jet conique plein selon au moins l'une des revendications précédentes, caractérisée en ce qu'une surface d'impact (40 ; 56), tournée vers l'orifice d'entrée, de l'élément de prépulvérisation en forme de barre est, en direction de l'orifice d'entrée, incurvée vers l'extérieur, plane ou conçue sous forme de surface intérieure d'un affaissement dans l'élément de prépulvérisation.
  12. Buse à jet conique plein selon au moins l'une des revendications précédentes, caractérisée en ce que l'orifice de sortie (24 ; 82) est disposé dans un fond de la chambre d'éjection, sachant que les parois intérieures de la chambre d'éjection se rencontrent en un milieu imaginaire de l'orifice de sortie (24 ; 82) à un angle compris entre 140° et 180°, en particulier entre 170° et 180°.
  13. Buse à jet conique plein selon au moins l'une des revendications précédentes, caractérisée en ce que le fond de la chambre est conçu sous forme sphérique.
  14. Buse à jet conique plein selon au moins l'une des revendications 1 à 12, caractérisée en ce que le fond de la chambre (60 ; 66) est conçu sous forme plane.
  15. Buse à jet conique plein selon la revendication 14, caractérisée en ce que des parois intérieures de la chambre d'éjection (68) sont disposées perpendiculairement au fond plan (66) de la chambre.
  16. Buse à jet conique plein selon la revendication 14, caractérisée en ce que des parois intérieures de la chambre d'éjection (62) rejoignent le fond plan (60) de la chambre à un angle de moins de 90°.
  17. Buse à jet conique plein selon au moins l'une des revendications 1 à 12, caractérisée en ce que le fond de la chambre est formé en déplaçant un foret ou une fraise, en particulier un foret de perçage à tête sphérique, dans au moins une direction latérale.
  18. Buse à jet conique plein selon au moins l'une des revendications précédentes, caractérisée en ce qu'une chambre de mélange (78) pour liquide et gaz est prévue en amont de l'orifice d'entrée (26).
  19. Buse à jet conique plein selon la revendication 18, caractérisée en ce que la chambre de mélange (78) est conçue pour une entrée d'un courant de fluide verticale par rapport à un courant de gaz, sachant qu'un sens d'écoulement de la chambre de mélange (78) vers le bec a lieu pour l'essentiel perpendiculairement au sens d'entrée du courant de fluide dans la chambre de mélange (78).
  20. Buse à jet conique plein selon la revendication 18 ou 19, caractérisée en ce qu'un tube prolongateur (92) est prévu entre la chambre de mélange (78) et le bec.
EP06015293A 2005-09-23 2006-07-22 Buse à jet conique plein Active EP1767277B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005047195A DE102005047195B3 (de) 2005-09-23 2005-09-23 Vollkegelsprühdüse

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EP1767277A2 EP1767277A2 (fr) 2007-03-28
EP1767277A3 EP1767277A3 (fr) 2008-03-05
EP1767277B1 true EP1767277B1 (fr) 2010-03-17

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US (1) US7552881B2 (fr)
EP (1) EP1767277B1 (fr)
KR (1) KR101110721B1 (fr)
CN (1) CN1935386B (fr)
AT (1) ATE460992T1 (fr)
DE (2) DE102005047195B3 (fr)
ES (1) ES2340788T3 (fr)

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Also Published As

Publication number Publication date
EP1767277A3 (fr) 2008-03-05
ES2340788T3 (es) 2010-06-09
CN1935386B (zh) 2011-06-08
US7552881B2 (en) 2009-06-30
KR101110721B1 (ko) 2012-02-17
ATE460992T1 (de) 2010-04-15
DE102005047195B3 (de) 2007-06-06
KR20070034437A (ko) 2007-03-28
EP1767277A2 (fr) 2007-03-28
DE502006006428D1 (de) 2010-04-29
US20070069049A1 (en) 2007-03-29
CN1935386A (zh) 2007-03-28

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