EP1729900B1 - Device for cooling metal sheets and strips - Google Patents

Device for cooling metal sheets and strips Download PDF

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Publication number
EP1729900B1
EP1729900B1 EP05707285A EP05707285A EP1729900B1 EP 1729900 B1 EP1729900 B1 EP 1729900B1 EP 05707285 A EP05707285 A EP 05707285A EP 05707285 A EP05707285 A EP 05707285A EP 1729900 B1 EP1729900 B1 EP 1729900B1
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EP
European Patent Office
Prior art keywords
nozzle
housing
coolant
gap
cooling
Prior art date
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Active
Application number
EP05707285A
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German (de)
French (fr)
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EP1729900A1 (en
Inventor
Hans-Jürgen Bender
Markus Cramer
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SMS Siemag AG
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SMS Demag AG
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Publication of EP1729900A1 publication Critical patent/EP1729900A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • 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
    • 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
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0254—Coating heads with slot-shaped outlet
    • B05C5/0262—Coating heads with slot-shaped outlet adjustable in width, i.e. having lips movable relative to each other in order to modify the slot width, e.g. to close it
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems

Definitions

  • the invention relates to a device for cooling of sheets and strips during their production, in particular after their rolls, which has a supply line for supplying a cooling medium, in particular water, which is connected to a housing, wherein in the housing two relatively slidably arranged nozzle rails are present, which can be arranged at a clearance and thereby form a rectangular cross-section nozzle gap for the cooling medium.
  • spray bars For cooling of sheets and strips in their manufacture spray bars are known with staggered nozzles, with which it is possible to spray a defined water flow in a certain geometric shape on the rolling stock. Both the amount of water per time and the type of water jet are crucial for the desired cooling effect. Depending on the application, full jet, flat jet or Kege jet nozzles are used.
  • spray bars are configured with a plurality (up to several hundred) of individual nozzles to a cooling system, which form a cooling line in a sheet metal manufacturing plant.
  • Difficulties are the selection of a suitable nozzle type and the determination of the nozzle arrangement, which defines the spray pattern.
  • it is often quite complicated to place the individual nozzles and to arrange by means of screw elements or by means of welds or adhesions.
  • the disadvantage here is further that known nozzles of the type mentioned can easily clog and it is a high cost to expose them again.
  • a flat rolling-type cooling apparatus in which cooling is performed by means of a laminar-flow water curtain.
  • a specially designed slot nozzle is provided, which consists of two L-shaped, relatively displaceable elements.
  • the DE 32 15 248 A1 discloses an apparatus for creating a closed curtain of water for cooling belts and sheets.
  • a cooling device for sheets and strips of the type mentioned is in the JP-A 57 10 37 28 described.
  • the housing of the cooling device is supplied with cooling water by means of a supply line.
  • the housing accommodates two nozzle rails, which are arranged so as to be displaceable relative to one another and which can be positioned at a predetermined distance.
  • a rectangular cross-section nozzle gap is created through which the water is discharged under pressure and passed to the rolling stock to be cooled.
  • the setting of the distance the nozzle rails and thus the width of the nozzle gap is accomplished by an electric motor.
  • the invention is therefore the object of a device for cooling of sheets and strips of the type mentioned in such a way that the disadvantages mentioned are avoided, d. H. that an absolutely uniform loading of the sheet or the tape with cooling medium is ensured.
  • the solution of this object by the invention is characterized in that in a device for cooling of sheets and strips between the entry point of the cooling medium in the housing and the nozzle gap at least one element is arranged, which forms a barrier to the cooling medium.
  • the element is designed as a baffle plate, which deflects the flow of the cooling medium in the interior of the housing.
  • the element may be formed as a flat plate extending parallel to the nozzle rails.
  • the length of the element preferably corresponds substantially to the length of the nozzle rails - viewed in the direction transverse to the conveying direction of the sheet or strip.
  • a preferred embodiment of the invention provides that the cooling medium is divided at the entry point into the housing into two symmetrical streams which are fed into two channels each a nozzle rail, wherein between the channel and nozzle rail or in channel at least one barrier element is arranged , It is particularly preferably provided that the element and a side facing away from the nozzle gap side of the nozzle rail forms a rectangular cross-section gap for the cooling medium.
  • the cooling medium is conducted from the gap to the nozzle gap, with both streams of the cooling medium reunite at the point of entry at the nozzle gap.
  • the channels in cross section have an arcuate, in particular circular arc, course.
  • An alternative embodiment of the invention provides that the cooling medium is divided at the entry point into two symmetrical streams, which are supplied in two channels to the nozzle gap, wherein a single element is arranged so that it narrows the cross section of both channels.
  • the element is designed as a plate, which is arranged between two housing walls, resulting in two passage gaps with a defined width.
  • the proposed device is characterized by a simple construction, which can be realized in a cost effective manner.
  • the proposed nozzle system can be easily cleaned, resulting in a high availability and reliability.
  • Fig. 1 is a device 1 for cooling sheets or strips outlined in their preparation.
  • a sheet 16 is moved in the direction of conveyance R under the device 1 at a constant speed.
  • cooling medium in the form of water must be injected in a defined manner on the surface of the sheet 16, which is accomplished by the device 1.
  • FIG. 1 shows a sectional view of the arrangement, wherein the sketched structure extends over a certain width perpendicular to the plane and the width of the device 1 is at least as large as the width of the sheet 16 to be cooled.
  • the device 1 To be able to inject cooling medium in the form of water in a defined manner on the surface of the sheet 16, the device 1, a housing 3, to which a supply line 2 is connected for water.
  • the water is conveyed within the housing 3 from the point of entry 7 of the water at the location of the supply line 2 to a nozzle gap 6, which is formed by two nozzle rails 4 and 5 arranged at a distance a from each other.
  • the two nozzle rails 4, 5 have in the cross section shown an L-shaped contour and can - which is not shown in detail - relative to each other in or against the conveying direction R are moved so that the desired clear distance a between the two legs 17th and 18 of the nozzle rails 4, 5 results.
  • the nozzle gap is defined by means of which it is possible to spray cooling medium in the form of a curtain of water on the sheet 16.
  • an element 8 is disposed within the housing 3 in the region of the flow path of the water between the entry point 7 and nozzle gap 6, which is a barrier to the water represents.
  • the element 8 is in the embodiment according to Fig. 1 formed as a baffle plate, which has the sketched rectangular contour and extends across the width of the device 1 perpendicular to the plane of the drawing.
  • the water divides into two symmetrical streams 9 'and 9 ", which in two arcuate channels 10' and 10" in the region of the opposite sides 11 'and 11 "of the legs 17 and 18 of the nozzle rails 4 or 5.
  • the baffle plate 8 is arranged, which forms a barrier to the water, so that it can be used in accordance with the Fig. 1 redirected to registered arrows.
  • the water is guided through a rectangular cross-section gap 12 'or 12 ", which results between the opposite sides 11' and 11" and the baffle plate 8 'and 8 ", respectively, in the upper end region of this gap 12' or 12 "The water is deflected again and directed to the entry point 13 of the nozzle gap 6.
  • the two streams 9 'and 9 "of the water unite again and exit together through the die gap 6.
  • the sheet 16 to be cooled from below is preferably, but not exclusively, a cooling device used, as in Fig. 2 outlined.
  • the sheet 16 is also conveyed here in the conveying direction R by means of guide rollers 19, wherein it is acted upon by means of the device 1 from below with water.
  • the basic structure of the device which in Fig. 2 can be seen corresponds to that according to Fig. 1 ,
  • the water passes at the entry point 7 of the supply line 1 in the housing 3.
  • the two nozzle rails 4, 5 are again formed L-shaped here, between the two legs 17, 18 of the nozzle rails 4, 5, the distance a forms and the Width of the nozzle gap 6 defined.
  • the water branches again into two symmetrical streams 9 'and 9 ", which are conducted via respective channels 10', 10" within the housing 3 to the nozzle gap 6.
  • the element 8 is formed as a single flat plate, which is so introduced into the region of the channels 10 ', 10 "that form two housing walls 14' and 14" passage column 15 'and 15 ", the each having a width b. After passing through the passage gaps 15 'or 15 ", the two water streams 9' and 9" unite at the entry point 13 into the die gap 6 and pass through it together.
  • the proposed embodiment results in an absolutely uniform loading of the sheet 16 with cooling water and thus the ability to adjust the technological boundary conditions to achieve desired material properties and thus to increase the quality of the produced strip or sheet.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Secondary Cells (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Manufacturing Of Electric Cables (AREA)

Abstract

Disclosed is a device (1) for cooling metal sheets and strips during the production thereof, particularly following rolling thereof. Said device (1) comprises a feeding duct (2) for delivering a cooling medium, especially water. Said feeding duct (2) is connected to a housing (3) inside which two nozzle rails (4, 5) are disposed so as to be movable relative to one another. Said two nozzle rails (4, 5) can be arranged at a short distance (a) from each other, thereby forming a nozzle gap (6) for the cooling medium, said nozzle gap (6) having a rectangular cross section. At least one element (8) that forms a barrier for the cooling medium is placed in the housing (3) between the point of entrance (7) of the cooling medium into the housing (3) and the nozzle gap (6).

Description

Die Erfindung betrifft eine Vorrichtung zum Kühlen von Blechen und Bändern bei deren Herstellung, insbesondere nach deren Walzen, die eine Zuführleitung zum Zuführen eines Kühlmediums, insbesondere von Wasser, aufweist, die mit einem Gehäuse verbunden ist, wobei im Gehäuse zwei relativ zueinander verschiebbar angeordnete Düsenschienen vorhanden sind, die in einem lichten Abstand angeordnet werden können und dabei einen im Querschnitt rechteckförmigen Düsenspalt für das Kühlmedium bilden.The invention relates to a device for cooling of sheets and strips during their production, in particular after their rolls, which has a supply line for supplying a cooling medium, in particular water, which is connected to a housing, wherein in the housing two relatively slidably arranged nozzle rails are present, which can be arranged at a clearance and thereby form a rectangular cross-section nozzle gap for the cooling medium.

Bei der Herstellung von Blechen und Bändern, insbesondere in Flachwalzwerken, ist es an verschiedenen Stellen erforderlich, das Blech bzw. das Band zu kühlen, um die Materialeigenschaften des Walzguts gezielt zu beeinflussen und ihm damit gewünschte Eigenschaften zu verleihen. Im Stand der Technik sind hierzu diverse Kühlvorrichtungen bekannt.In the production of metal sheets and strips, in particular in flat rolling mills, it is necessary at various points to cool the sheet or the strip in order to influence the material properties of the rolling stock in a targeted manner and thus to give it desired properties. Various cooling devices are known in the prior art for this purpose.

Zum Kühlen von Blechen und Bändern bei deren Herstellung sind Spritzbalken mit versetzt angeordneten Düsen bekannt, mit denen es möglich ist, einen definierten Wasserstrom in bestimmter geometrischer Form auf das Walzgut aufzuspritzen. Sowohl die Wassermenge pro Zeit als auch die Art des Wasserstrahls sind dabei entscheidend für die gewünschte Kühlwirkung. Je nach Anwendung kommen Vollstrahl-, Flachstrahl- oder Kegeistrahldüsen zum Einsatz.For cooling of sheets and strips in their manufacture spray bars are known with staggered nozzles, with which it is possible to spray a defined water flow in a certain geometric shape on the rolling stock. Both the amount of water per time and the type of water jet are crucial for the desired cooling effect. Depending on the application, full jet, flat jet or Kege jet nozzles are used.

Mitunter werden Spritzbalken mit einer Vielzahl (bis zu mehreren hundert) einzelner Düsen zu einem Kühlsystem konfiguriert, die eine Kühlstrecke in einer Blechherstellanlage bilden.Sometimes spray bars are configured with a plurality (up to several hundred) of individual nozzles to a cooling system, which form a cooling line in a sheet metal manufacturing plant.

Schwierigkeiten bereitet dabei die Auswahl eines geeigneten Düsentyps und die Festlegung der Düsenanordnung, die das Spritzbild definiert. Bei der Herstellung des Kühlsystems ist es oft recht aufwändig, die einzelnen Düsen zu platzieren und mittels Schraubelementen bzw. mittels Schweißungen oder Klebungen anzuordnen. Nachteilig ist hierbei ferner, dass bekannte Düsen der genannten Art leicht verstopfen können und es einen hohen Aufwand darstellt, sie wieder freizulegen.Difficulties are the selection of a suitable nozzle type and the determination of the nozzle arrangement, which defines the spray pattern. In the production of the cooling system, it is often quite complicated to place the individual nozzles and to arrange by means of screw elements or by means of welds or adhesions. The disadvantage here is further that known nozzles of the type mentioned can easily clog and it is a high cost to expose them again.

In der DE 36 34 188 C2 wird eine Kühlvorrichtung für flaches Walzgut beschrieben, bei der das Kühlen mittels eines Wasservorhangs mit laminarer Strömung erfolgt. Um den Wasservorhang auf die Breite des zu kühlenden Gutes einzustellen, ist eine besonders ausgebildete Schlitzdüse vorgesehen, die aus zwei L-förmigen, relativ zueinander verschiebbaren Elementen besteht. Die DE 32 15 248 A1 offenbart eine Vorrichtung zur Erzeugung eines geschlossenen Wasservorhangs zur Kühlung von Bändern und Blechen. Um einen kohärenten Wasservorhang und eine große Benetzungsbreite bei großen Fallhöhen unter Verzicht auf verstell- bzw. verschwenkbare Wandteile der Düsen zu erhalten, ist hier vorgesehen, dass im Bereich des Düseneinlasses oder auf einem Teil der Fallhöhe der Wasserströmung durch gezielte Querschnittserweiterung ein Druckabfall und damit eine Herabsetzung der Ausströmgeschwindigkeit eingestellt wird. Ähnliche Lösungen, die sich mit einer besonders effizienten Ausbildung von Spritzdüsen bzw. Spritzbalken beschäftigen, gehen aus der DE 33 34 251 C2 , der JP-A 60 13 39 11 , der JP-A 80 39 126 und der JP-A 58 06 84 19 hervor.In the DE 36 34 188 C2 For example, a flat rolling-type cooling apparatus is described in which cooling is performed by means of a laminar-flow water curtain. In order to adjust the water curtain to the width of the material to be cooled, a specially designed slot nozzle is provided, which consists of two L-shaped, relatively displaceable elements. The DE 32 15 248 A1 discloses an apparatus for creating a closed curtain of water for cooling belts and sheets. In order to obtain a coherent water curtain and a large wetting width at large drop heights waiving adjustable or pivotable wall parts of the nozzles, it is provided here that in the region of the nozzle inlet or on a portion of the drop height of the water flow through targeted cross-sectional widening a pressure drop and thus a Reduction of the discharge velocity is set. Similar solutions, which deal with a particularly efficient formation of spray nozzles or spray bars, go from the DE 33 34 251 C2 , of the JP-A 60 13 39 11 , of the JP-A 80 39 126 and the JP-A 58 06 84 19 out.

Eine Kühlvorrichtung für Bleche und Bänder der eingangs genannten Art ist in der JP-A 57 10 37 28 beschrieben. Dem Gehäuse der Kühlvorrichtung wird mittels einer Zuführleitung Kühlwasser zugeführt. Das Gehäuse nimmt zwei relativ zueinander verschiebbar angeordnete Düsenschienen auf, die in einem vorgegebenen Abstand positionierbar sind. Hierdurch wird ein im Querschnitt rechteckförmiger Düsenspalt geschaffen, durch den das Wasser unter Druck ausgebracht und auf das zu kühlende Walzgut geleitet wird. Die Einstellung des Abstandes der Düsenschienen und damit der Breite des Düsenspalts wird durch einen Elektromotor bewerkstelligt.A cooling device for sheets and strips of the type mentioned is in the JP-A 57 10 37 28 described. The housing of the cooling device is supplied with cooling water by means of a supply line. The housing accommodates two nozzle rails, which are arranged so as to be displaceable relative to one another and which can be positioned at a predetermined distance. As a result, a rectangular cross-section nozzle gap is created through which the water is discharged under pressure and passed to the rolling stock to be cooled. The setting of the distance the nozzle rails and thus the width of the nozzle gap is accomplished by an electric motor.

Wenngleich mit einer Kühlvorrichtung dieser Art bereits ein gutes Arbeitsergebnis erzielt werden kann, hat es sich herausgestellt, dass die vorbekannte Ausgestaltung eines Kühlsystems noch nicht optimal arbeitet, weil die gleichmäßige Wasserverteilung auf das Kühlgut mitunter Probleme bereitet. Das vorbekannte System ist bezüglich Druckschwankungen in der Kühlmedienzufuhr empfindlich, so dass nicht unter allen Betriebsbedingungen sichergestellt werden kann, dass ein optimales Spritzbild und damit bestmögliche Materialeigenschaften bei der Herstellung des Blechs bzw. des Bands gewährleistet sind.Although a good work result can already be achieved with a cooling device of this type, it has been found that the previously known design of a cooling system does not work optimally because the uniform distribution of water on the goods to be cooled sometimes causes problems. The known system is sensitive to pressure fluctuations in the cooling medium supply, so that it can not be ensured under all operating conditions that an optimal spray pattern and thus the best possible material properties are ensured in the production of the sheet or the band.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung zum Kühlen von Blechen und Bändern der eingangs genannten Art so fortzubilden, dass die genannten Nachteile vermieden werden, d. h. dass eine absolut gleichmäßige Beaufschlagung des Blechs bzw. des Bands mit Kühlmedium sichergestellt ist.The invention is therefore the object of a device for cooling of sheets and strips of the type mentioned in such a way that the disadvantages mentioned are avoided, d. H. that an absolutely uniform loading of the sheet or the tape with cooling medium is ensured.

Die Lösung dieser Aufgabe durch die Erfindung ist dadurch gekennzeichnet, dass bei einer Vorrichtung zum Kühlen von Blechen und Bändern zwischen dem Eintrittspunkt des Kühlmediums in das Gehäuse und dem Düsenspalt mindestens ein Element angeordnet ist, das eine Barriere für das Kühlmedium bildet.The solution of this object by the invention is characterized in that in a device for cooling of sheets and strips between the entry point of the cooling medium in the housing and the nozzle gap at least one element is arranged, which forms a barrier to the cooling medium.

Bevorzugt ist das Element als Prallblech ausgebildet, das den Fluss des Kühlmediums im Inneren des Gehäuses ablenkt. Das Element kann dabei als ebene Platte ausgebildet sein, die sich parallel zu den Düsenschienen erstreckt. Die Länge des Elements entspricht bevorzugt im wesentlichen der Länge der Düsenschienen - in Richtung quer zur Förderrichtung des Blechs oder Bands betrachtet.Preferably, the element is designed as a baffle plate, which deflects the flow of the cooling medium in the interior of the housing. The element may be formed as a flat plate extending parallel to the nozzle rails. The length of the element preferably corresponds substantially to the length of the nozzle rails - viewed in the direction transverse to the conveying direction of the sheet or strip.

Eine bevorzugte Ausgestaltung der Erfindung sieht vor, dass das Kühlmedium am Eintrittspunkt in das Gehäuse in zwei symmetrische Ströme aufgeteilt wird, die in zwei Kanälen je einer Düsenschiene zugeführt werden, wobei zwischen Kanal und Düsenschiene bzw. im Kanal je mindestens ein Barriere-Element angeordnet ist. Dabei ist besonders bevorzugt vorgesehen, dass das Element und eine vom Düsenspalt abgewandte Seite der Düsenschiene einen im Querschnitt rechteckförmigen Spalt für das Kühlmedium bildet. Mit Vorteil wird das Kühlmedium vom Spalt zum Düsenspalt geleitet, wobei sich beide Ströme des Kühlmediums an der Eintrittsstelle am Düsenspalt wieder vereinigen. Schließlich kann bei dieser Ausgestaltung noch vorgesehen sein, dass die Kanäle im Querschnitt einen bogenförmigen, insbesondere kreisbogenförmigen, Verlauf aufweisen.A preferred embodiment of the invention provides that the cooling medium is divided at the entry point into the housing into two symmetrical streams which are fed into two channels each a nozzle rail, wherein between the channel and nozzle rail or in channel at least one barrier element is arranged , It is particularly preferably provided that the element and a side facing away from the nozzle gap side of the nozzle rail forms a rectangular cross-section gap for the cooling medium. Advantageously, the cooling medium is conducted from the gap to the nozzle gap, with both streams of the cooling medium reunite at the point of entry at the nozzle gap. Finally, it can still be provided in this embodiment that the channels in cross section have an arcuate, in particular circular arc, course.

Eine alternative Ausgestaltung der Erfindung sieht vor, dass das Kühlmedium am Eintrittspunkt in zwei symmetrische Ströme aufgeteilt wird, die in zwei Kanälen dem Düsenspalt zugeführt werden, wobei ein einziges Element so angeordnet ist, dass es den Querschnitt beider Kanäle verengt. Bevorzugt ist das Element als Platte ausgebildet, die so zwischen zwei Gehäusewandungen angeordnet ist, dass sich zwei Durchtrittsspalte mit definierter Breite ergeben.An alternative embodiment of the invention provides that the cooling medium is divided at the entry point into two symmetrical streams, which are supplied in two channels to the nozzle gap, wherein a single element is arranged so that it narrows the cross section of both channels. Preferably, the element is designed as a plate, which is arranged between two housing walls, resulting in two passage gaps with a defined width.

Mit dem erfindungsgemäßen Vorschlag werden verschiedene Vorteile erzielt:With the proposal according to the invention various advantages are achieved:

Zunächst ist es durch das Verschieben der beiden Düsenschienen, d. h. durch deren Einstellung auf einen gewünschten lichten Abstand in einfacher Weise möglich, die Schlitzdüsenbreite einzustellen und damit eine gewünschte Strahldicke zu erzielen. Der Strahl ist über die gesamte Band- bzw. Blechbreite konstant. Die Dicke des Kühlstrahls kann also in Folge der Einstellbarkeit auf die jeweiligen technologischen Erfordernisse leicht eingestellt werden.First, it is possible by the displacement of the two nozzle rails, ie by adjusting them to a desired clear distance in a simple manner to adjust the slot width and thus to achieve a desired beam thickness. The beam is constant over the entire belt or sheet width. The thickness of the cooling jet can thus be easily adjusted as a result of the adjustability to the respective technological requirements.

Durch die Bauart ist nicht zu befürchten, dass es zu Kühlstreifen kommt, d. h. zu Bereichen im Blech bzw. Band, die im Verhältnis zu anderen Bereichen unterschiedlich stark abgekühlt werden.Due to the design is not to be feared that it comes to cooling strips, d. H. to areas in the sheet or strip, which are cooled differently in relation to other areas.

Die vorgeschlagene Vorrichtung zeichnet sich durch eine einfache Konstruktion aus, die in kostengünstiger Weise realisierbar ist.The proposed device is characterized by a simple construction, which can be realized in a cost effective manner.

Besonders hervorzuheben ist eine absolut gleichmäßige Wasserbeaufschlagung des zu kühlenden Blechs bzw. Bands, wodurch eine maximale Homogenität der Materialstruktur im Blech bzw. Band erzielbar ist. Kühlstreifenbildung auf dem Blech bzw. Band ist damit ausgeschlossen.Particularly noteworthy is an absolutely uniform application of water to be cooled sheet or strip, whereby a maximum homogeneity of the material structure in the sheet or strip can be achieved. Chill formation on the sheet or strip is thus excluded.

Im Falle einer Verunreinigung kann das vorgeschlagene Düsensystem leicht gereinigt werden, wodurch sich eine hohe Verfügbarkeit und Betriebssicherheit ergibt.In case of contamination, the proposed nozzle system can be easily cleaned, resulting in a high availability and reliability.

In der Zeichnung sind zwei Ausführungsbeispiele der Erfindung dargestellt.In the drawing, two embodiments of the invention are shown.

Es zeigen:

Fig. 1
die Schnittdarstellung einer Vorrichtung zum Kühlen eines Blechs bzw. Bands in der Seitenansicht und
Fig. 2
eine zu Fig. 1 alternative Ausgestaltung.
Show it:
Fig. 1
the sectional view of a device for cooling a sheet or strip in the side view and
Fig. 2
one too Fig. 1 alternative embodiment.

In Fig. 1 ist eine Vorrichtung 1 zum Kühlen von Blechen bzw. Bändern bei deren Herstellung skizziert. Ein Blech bzw. Band 16 wird in Förderichtung R unter der Vorrichtung 1 mit konstanter Geschwindigkeit bewegt. Zur Erzielung gewünschter Materialeigenschaften muss Kühlmedium in Form von Wasser in definierter Weise auf die Oberfläche des Blechs 16 gespritzt werden, was durch die Vorrichtung 1 bewerkstelligt wird.In Fig. 1 is a device 1 for cooling sheets or strips outlined in their preparation. A sheet 16 is moved in the direction of conveyance R under the device 1 at a constant speed. To achieve desired material properties cooling medium in the form of water must be injected in a defined manner on the surface of the sheet 16, which is accomplished by the device 1.

Es sei angemerkt, dass die Darstellung gemäß Fig. 1 eine Schnittdarstellung der Anordnung zeigt, wobei sich die skizzierte Struktur über eine gewisse Breite senkrecht zur Zeichenebene erstreckt und die Breite der Vorrichtung 1 mindestens so groß wie die Breite des zu kühlenden Blechs 16 ist.It should be noted that the illustration according to Fig. 1 shows a sectional view of the arrangement, wherein the sketched structure extends over a certain width perpendicular to the plane and the width of the device 1 is at least as large as the width of the sheet 16 to be cooled.

Um Kühlmedium in Form von Wasser in definierter Weise auf die Oberfläche des Blechs 16 spritzen zu können, weist die Vorrichtung 1 ein Gehäuse 3 auf, an das eine Zuführleitung 2 für Wasser angeschlossen ist. Das Wasser wird innerhalb des Gehäuses 3 vom Eintrittspunkt 7 des Wassers am Ort der Zuführleitung 2 zu einem Düsenspalt 6 gefördert, der durch zwei in einem Abstand a zueinander angeordneten Düsenschienen 4 und 5 gebildet wird. Die beiden Düsenschienen 4, 5 weisen im dargestellten Querschnitt eine L-förmige Kontur auf und können - was im Detail nicht dargestellt ist - relativ zueinander in bzw. entgegen Förderrichtung R so bewegt werden, dass sich der gewünschte lichte Abstand a zwischen den beiden Schenkeln 17 und 18 der Düsenschienen 4, 5 ergibt. Hierdurch wird der Düsenspalt definiert, mittels dem es möglich ist, Kühlmedium in Form eines Wasservorhangs auf das Blech 16 aufzuspritzen.To be able to inject cooling medium in the form of water in a defined manner on the surface of the sheet 16, the device 1, a housing 3, to which a supply line 2 is connected for water. The water is conveyed within the housing 3 from the point of entry 7 of the water at the location of the supply line 2 to a nozzle gap 6, which is formed by two nozzle rails 4 and 5 arranged at a distance a from each other. The two nozzle rails 4, 5 have in the cross section shown an L-shaped contour and can - which is not shown in detail - relative to each other in or against the conveying direction R are moved so that the desired clear distance a between the two legs 17th and 18 of the nozzle rails 4, 5 results. As a result, the nozzle gap is defined by means of which it is possible to spray cooling medium in the form of a curtain of water on the sheet 16.

Um das Wasser aus dem Düsenspalt 6 in möglichst gleichmäßiger Weise auszubringen und damit Kühlstreifenbildung auf dem Blech 16 zu verhindern, ist innerhalb des Gehäuses 3 im Bereich des Fließweges des Wassers zwischen Eintrittspunkt 7 und Düsenspalt 6 ein Element 8 angeordnet, das eine Barriere für das Wasser darstellt. Das Element 8 ist im Ausführungsbeispiel gemäß Fig. 1 als Prallblech ausgebildet, das die skizzierte rechteckförmige Kontur hat und sich über die Breite der Vorrichtung 1 senkrecht zur Zeichenebene erstreckt.In order to bring out the water from the nozzle gap 6 in the most uniform manner and thus prevent cooling strip formation on the plate 16, an element 8 is disposed within the housing 3 in the region of the flow path of the water between the entry point 7 and nozzle gap 6, which is a barrier to the water represents. The element 8 is in the embodiment according to Fig. 1 formed as a baffle plate, which has the sketched rectangular contour and extends across the width of the device 1 perpendicular to the plane of the drawing.

Vom Eintrittspunkt 7 aus teilt sich das Wasser in zwei symmetrischen Ströme 9' und 9" auf, das in zwei kreisbogenförmig ausgebildeten Kanälen 10' und 10" in den Bereich der abgewandten Seiten 11' bzw. 11" der Schenkel 17 bzw. 18 der Düsenschienen 4 bzw. 5 gelangt. Dort allerdings ist das Prallblech 8 angeordnet, das eine Barriere für das Wasser bildet, so dass es gemäß den in Fig. 1 eingetragenen Pfeilen umgelenkt wird. Das Wasser wird durch einen im Querschnitt rechteckförmigen Spalt 12' bzw. 12" geführt, der sich zwischen den abgewandten Seiten 11' bzw. 11" und dem Prallblech 8' bzw. 8" ergibt. Im oberen Endbereich dieses Spalts 12' bzw. 12" wird das Wasser erneut umgelenkt und zur Eintrittsstelle 13 des Düsenspalts 6 geleitet. Hier vereinigen sich die beiden Ströme 9' und 9" des Wassers wiederum und treten gemeinsam durch den Düsenspalt 6 aus.From the entry point 7, the water divides into two symmetrical streams 9 'and 9 ", which in two arcuate channels 10' and 10" in the region of the opposite sides 11 'and 11 "of the legs 17 and 18 of the nozzle rails 4 or 5. However, there the baffle plate 8 is arranged, which forms a barrier to the water, so that it can be used in accordance with the Fig. 1 redirected to registered arrows. The water is guided through a rectangular cross-section gap 12 'or 12 ", which results between the opposite sides 11' and 11" and the baffle plate 8 'and 8 ", respectively, in the upper end region of this gap 12' or 12 "The water is deflected again and directed to the entry point 13 of the nozzle gap 6. Here the two streams 9 'and 9 "of the water unite again and exit together through the die gap 6.

Die in Fig. 1 skizzierte Kühlvorrichtung eignet sich besonders gut dafür, um von oben Wasser auf das Blech 16 zu leiten.In the Fig. 1 sketched cooling device is particularly well suited for directing water from above to the plate 16.

Soll das Blech 16 von unten gekühlt werden, kommt bevorzugt, jedoch nicht ausschließlich, eine Kühlvorrichtung zum Einsatz, wie sie in Fig. 2 skizziert ist.If the sheet 16 to be cooled from below, is preferably, but not exclusively, a cooling device used, as in Fig. 2 outlined.

Das Blech 16 wird auch hier in Förderrichtung R mittels Führungsrollen 19 gefördert, wobei es mittels der Vorrichtung 1 von unten mit Wasser beaufschlagt wird.The sheet 16 is also conveyed here in the conveying direction R by means of guide rollers 19, wherein it is acted upon by means of the device 1 from below with water.

Der prinzipielle Aufbau der Vorrichtung, die in Fig. 2 zu sehen ist, entspricht derjenigen gemäß Fig. 1. Das Wasser gelangt am Eintrittspunkt 7 von der Zuführleitung 1 in das Gehäuse 3. Die beiden Düsenschienen 4, 5 sind auch hier wieder L-förmig ausgebildet, wobei sich zwischen den beiden Schenkeln 17, 18 der Düsenschienen 4, 5 der Abstand a ausbildet und die Breite des Düsenspalts 6 definiert.The basic structure of the device, which in Fig. 2 can be seen corresponds to that according to Fig. 1 , The water passes at the entry point 7 of the supply line 1 in the housing 3. The two nozzle rails 4, 5 are again formed L-shaped here, between the two legs 17, 18 of the nozzle rails 4, 5, the distance a forms and the Width of the nozzle gap 6 defined.

Am Eintrittspunkt 7 verzweigt sich das Wasser wiederum in zwei symmetrische Ströme 9' und 9", die über jeweilige Kanäle 10', 10" innerhalb des Gehäuses 3 zum Düsenspalt 6 geleitet werden.At the entry point 7, the water branches again into two symmetrical streams 9 'and 9 ", which are conducted via respective channels 10', 10" within the housing 3 to the nozzle gap 6.

In diesem Falle ist das Element 8 als eine einzige ebene Platte ausgebildet, die so in den Bereich der Kanäle 10', 10" eingebracht ist, dass sich zu zwei Gehäusewandungen 14' bzw. 14" Durchtrittsspalte 15' bzw. 15" ausbilden, die jeweils eine Breite b aufweisen. Nach dem Passieren der Durchtrittsspalte 15' bzw. 15" vereinigen sich die beiden Wasserströme 9' und 9" an der Eintrittsstelle 13 in den Düsenspalt 6 und treten durch diesen gemeinsam hindurch.In this case, the element 8 is formed as a single flat plate, which is so introduced into the region of the channels 10 ', 10 "that form two housing walls 14' and 14" passage column 15 'and 15 ", the each having a width b. After passing through the passage gaps 15 'or 15 ", the two water streams 9' and 9" unite at the entry point 13 into the die gap 6 and pass through it together.

Durch die vorgeschlagene Ausgestaltung ergibt sich eine absolut gleichmäßige Beaufschlagung des Blechs 16 mit Kühlwasser und damit die Möglichkeit, die technologischen Randbedingungen zur Erzielung gewünschter Materialeigenschaften genau einzustellen und damit die Qualität des herzustellenden Bandes bzw. Bleches zu erhöhen.The proposed embodiment results in an absolutely uniform loading of the sheet 16 with cooling water and thus the ability to adjust the technological boundary conditions to achieve desired material properties and thus to increase the quality of the produced strip or sheet.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Vorrichtungcontraption
22
Zuführleitungfeed
33
Gehäusecasing
44
Düsenschienenozzle rail
55
Düsenschienenozzle rail
66
Düsenspaltdie gap
77
Eintrittspunkt des KühlmediumsEntry point of the cooling medium
88th
Elementelement
8'8th'
Elementelement
8"8th"
Elementelement
9'9 '
Kühlmedien-StromCooling media power
9"9 "
Kühlmedium-StromCooling medium flow
10'10 '
Kanalchannel
10"10 "
Kanalchannel
11'11 '
Seite der DüsenschieneSide of the nozzle rail
11"11 "
Seite der DüsenschieneSide of the nozzle rail
12'12 '
Spaltgap
12"12 "
Spaltgap
1313
Eintrittsstelle am DüsenspaltEntry point at the nozzle gap
14'14 '
Gehäusewandunghousing
14"14 "
Gehäusewandunghousing
15'15 '
DurchtrittsspaltPassage gap
15"15 "
DurchtrittsspaltPassage gap
1616
Blech, BandSheet metal, tape
1717
Schenkelleg
1818
Schenkelleg
1919
Führungsrolleleadership
aa
Abstanddistance
bb
Breitewidth
RR
Förderrichtungconveying direction

Claims (10)

  1. Device (1) for cooling sheets and strips during manufacture thereof, particularly after rolling thereof, which comprises a feed line (2) for the feed of a coolant, particularly water, which is connected with a housing (3), wherein present in the housing (3) are two nozzle rails (4, 5) which are arranged to be displaceable relative to one another and which can be disposed at a clear spacing (a) and in that case form a nozzle gap (6) of rectangular cross-section for the coolant, characterised in that at least one element (8) forming a barrier for the coolant is arranged in the housing (3) between the entry point (7) of the coolant into the housing (3) and the nozzle gap (6).
  2. Device according to claim 1, characterised in that the element (8) is constructed as a baffle plate which diverts the flow of the coolant in the interior of the housing (3).
  3. Device according to claim 1 or 2, characterised in that the element (8) is constructed as a flat plate which extends parallel to the nozzle rails (4, 5).
  4. Device according to claim 3, characterised in that the length of the element (8) substantially corresponds with that of the nozzle rails (4, 5).
  5. Device according to any one of claims 1 to 4, characterised in that the coolant at the entry point (7) into the housing (3) is divided up into two symmetrical flows (9', 9"), which are fed in two channels (10', 10") to a respective nozzle rail (4, 5), wherein a respective element (8', 8") is arranged in the channel (10', 10") in front of the nozzle rail (4, 5) in the direction of flow.
  6. Device according to claim 5, characterised in that the element (8', 8") and a side (11', 11") of the nozzle rail (4, 5) remote from the nozzle gap (6) form a gap (12', 12") of rectangular cross-section for the coolant.
  7. Device according to claim 6, characterised in that the coolant is conducted from the gap (12', 12") to the nozzle gap (6), wherein the two flows (9', 9") of the coolant reunite at the entry point (13) at the nozzle gap (6).
  8. Device according to any one of claims 5 to 7, characterised in that the channels (10', 10") have a curved, particularly circularly arcuate, course at least in sections in cross-section.
  9. Device according to any one of claims 1 to 4, characterised in that the coolant at the entry point (7) into the housing (3) is divided up into two symmetrical flows (9', 9"), which are fed in two channels (10', 10") to the nozzle gap (6), wherein a single element (8) is so arranged that it narrows the cross-section of both channels (10', 10"),
  10. Device according to claim 9, characterised in that the element (8) is constructed as a plate which is so arranged between two housing walls (14', 14") that two passage gaps (15', 15") with defined width (b) result.
EP05707285A 2004-03-29 2005-02-09 Device for cooling metal sheets and strips Active EP1729900B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004015741A DE102004015741A1 (en) 2004-03-29 2004-03-29 Device for cooling sheets and strips
PCT/EP2005/001296 WO2005105334A1 (en) 2004-03-29 2005-02-09 Device for cooling metal sheets and strips

Publications (2)

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EP1729900A1 EP1729900A1 (en) 2006-12-13
EP1729900B1 true EP1729900B1 (en) 2008-12-03

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US (1) US7690215B2 (en)
EP (1) EP1729900B1 (en)
JP (1) JP4781348B2 (en)
KR (1) KR101121995B1 (en)
CN (1) CN100471590C (en)
AT (1) ATE416044T1 (en)
BR (1) BRPI0509196A (en)
CA (1) CA2561760C (en)
DE (2) DE102004015741A1 (en)
ES (1) ES2315840T3 (en)
RU (1) RU2365443C2 (en)
TW (1) TWI324540B (en)
UA (1) UA85873C2 (en)
WO (1) WO2005105334A1 (en)
ZA (1) ZA200605450B (en)

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CN102703614B (en) * 2012-06-11 2015-04-22 深圳市合川科技有限公司 Spray agent type cooling system
EP2783766A1 (en) * 2013-03-25 2014-10-01 Siemens VAI Metals Technologies GmbH Cooling section with lower spray bar
EA027490B1 (en) * 2013-04-17 2017-07-31 Общество С Ограниченной Ответственностью Научно-Производственное Предприятие "Томская Электронная Компания" Device for thermally processing rails
CN107649525B (en) * 2017-10-27 2019-07-05 中冶南方工程技术有限公司 Prevent the spray header and Cold Rolling System of dropping liquid
DE102017220891A1 (en) * 2017-11-22 2019-05-23 Sms Group Gmbh Method for cooling a metallic material and cooling beam
JP7357937B2 (en) 2018-01-23 2023-10-10 ア－ル デー ピー グループ リミテッド Shipping pallets and/or decks useful for shipping
DE102018202843A1 (en) * 2018-02-26 2019-08-29 Sms Group Gmbh Cooling device for cooling a material to be cooled

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UA85873C2 (en) 2009-03-10
ATE416044T1 (en) 2008-12-15
TWI324540B (en) 2010-05-11
ES2315840T3 (en) 2009-04-01
CN1938111A (en) 2007-03-28
BRPI0509196A (en) 2007-09-18
US7690215B2 (en) 2010-04-06
JP4781348B2 (en) 2011-09-28
ZA200605450B (en) 2007-09-26
TW200531757A (en) 2005-10-01
DE502005006140D1 (en) 2009-01-15
CN100471590C (en) 2009-03-25
DE102004015741A1 (en) 2005-10-20
KR101121995B1 (en) 2012-03-09
US20080264073A1 (en) 2008-10-30
WO2005105334A1 (en) 2005-11-10
CA2561760C (en) 2011-10-25
EP1729900A1 (en) 2006-12-13
KR20060128923A (en) 2006-12-14
RU2365443C2 (en) 2009-08-27
CA2561760A1 (en) 2005-11-10
RU2006133645A (en) 2008-03-27

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