EP0924003A2 - Cooling device for cooling a moving hot metal strip - Google Patents

Cooling device for cooling a moving hot metal strip Download PDF

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Publication number
EP0924003A2
EP0924003A2 EP98122254A EP98122254A EP0924003A2 EP 0924003 A2 EP0924003 A2 EP 0924003A2 EP 98122254 A EP98122254 A EP 98122254A EP 98122254 A EP98122254 A EP 98122254A EP 0924003 A2 EP0924003 A2 EP 0924003A2
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EP
European Patent Office
Prior art keywords
coolant
cooling device
shut
coolant discharge
lines
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
EP98122254A
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German (de)
French (fr)
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EP0924003B1 (en
EP0924003A3 (en
Inventor
Gerlinde Dipl.-Ing. Djumlija
Jian Ing. Dr. Chen
Andreas Dipl.-Ing. Schweighofer
Johann Oberhumer
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Primetals Technologies Austria GmbH
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Voest Alpine Industrienlagenbau GmbH
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Publication of EP0924003A2 publication Critical patent/EP0924003A2/en
Publication of EP0924003A3 publication Critical patent/EP0924003A3/en
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Publication of EP0924003B1 publication Critical patent/EP0924003B1/en
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    • 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
    • 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

Definitions

  • the invention relates to a cooling device for cooling a hot moving metal strip by means of laminar coolant jets, consisting of at least one transverse to the tape running direction arranged water box into which at least one coolant supply line opens and from which a plurality of spaced-apart coolant outlets emerge.
  • the hot strip is cooled by laminar cooling water jets, whereby the cooling effect depends very much on the formation of these cooling water jets.
  • a Laminar cooling water jet leads to a much stronger cooling than a turbulent one Jet, since a laminar cooling water jet is able to stick to the hot strip surface break through forming vapor layer and thus achieve a higher cooling effect.
  • a laminar cooling water section essentially consists of several in a row arranged, extending transversely to the tape running water boxes, each Water box has a variety of cooling water drains.
  • Such Cooling device is already known from DE-OS 21 07 664.
  • the cooling water drains formed by siphon tubes arranged next to one another transversely to the direction of tape travel, through which the cooling water is applied to the belt surface.
  • the object of the invention is therefore to avoid these disadvantages and a cooling device to propose to cool a hot moving metal strip by means of laminar coolant jets, which not only during operation but also in the switch-on and Shutdown phase of the cooling device uniform flow conditions in the coolant jets occur and especially after switching off an uncontrolled flow of Coolant is safely avoided.
  • each coolant discharge has a shut-off device on the outlet side assigned.
  • the shut-off device is designed as a slide or ball valve.
  • a significant simplification of the cooling device results from the fact that several or all shut-off devices assigned to the individual coolant discharge lines are mechanically coupled and are connected to a common adjustment drive.
  • the mechanically coupled shut-off devices are formed by a shift shaft which is transverse to the longitudinal axis of the shift shaft at a distance of Coolant discharges to each other through openings and that with an adjustment drive from a position in which the through openings with the coolant drains aligned in a position in which the selector shaft blocks the coolant discharge is adjustable and vice versa.
  • the selector shaft is mounted in a multi-part housing, in which the coolant drains open, and in the area penetrated by through openings Switching shaft in the housing shells inserted annular sealing shells are arranged, which with the coolant discharge lines and the through openings penetrating the selector shaft have aligned through openings.
  • a further stabilization of the flow conditions is achieved in that each coolant drain a diffuser for bundling the coolant jet is assigned, the Shut-off device is arranged downstream of the diffuser and the diameter of the through opening is larger than the diameter of the outlet opening in the diffuser.
  • the coolant discharge lines are downpipes trained, which project substantially vertically upwards in the water tank.
  • the coolant discharge lines are downpipes trained, which project substantially vertically upwards in the water tank.
  • the from DE-OS 21 07 664 known U-tubes result in manufacturing advantages that lead to a substantial reduction in the cost of the cooling device. Overall, one emerges significantly more compact assembly, eliminating the risk of damage from rising or getting stuck Band is significantly reduced.
  • a flow stabilizer is installed in each Coolant drainage.
  • This flow stabilizer is formed by at least one insert, preferably of two at right angles to each other, inserted in the coolant drain and the cross-sectional area of the Coolant drainage in segments dividing guide elements, preferably composed of sheets is.
  • Fig. 1 shows a possible embodiment of the cooling device according to the invention for Cooling a moving hot metal strip 1 by means of laminar coolant jets.
  • the hot Metal strip 1 is in this case on a transport roller table indicated by a roller table roller 2 challenged from a rolling mill, not shown, or a single roll stand and at a distance below the cooling device with a preselected transport speed transported.
  • the cooling device consists of several in a row Water boxes 3 arranged in the direction of belt travel, one of which is shown in FIGS. 1 and 2 is shown.
  • the water tank 3 has a central coolant supply 4 and a large number of coolant discharge lines 5 arranged in two rows (FIG.
  • shut-off devices 6 which serve as downpipes are formed and protrude vertically upwards inside the water box 3. Exit side connect to the coolant discharge lines 5 shut-off devices 6, with which the exit of Coolant from all coolant discharge lines 5 interrupted or started at the same time can be.
  • the type of shut-off device is largely arbitrary. Is restrictive only to be taken into account here that the coolant jet leaving the shut-off device 6 must have laminar flow properties.
  • the shut-off devices 6 can for example be designed as a slide or ball valves.
  • the shut-off elements 6 are shown in FIGS. 1 and 2 coupled by a common switching shaft 7, which is connected to a common adjustment drive 9 is connected.
  • Fig. 3 this is by a continuous shift shaft 7 and a multi-part housing 10, 11, 12 to a single compact component shutoff 6 shown in detail.
  • the control shaft 7 is at a distance from the central axes 13, 14 of the coolant lines 5 from Passages through 15, which in the open position of the shift shaft 7 with the Coolant lines 5 are aligned.
  • the selector shaft 7 With the adjustment drive 9, the selector shaft 7 is in a 90 ° pivoted closed position blocking the flow of the coolant is rotatable.
  • the Switch shaft 7 is in a two-part housing formed by two housing shells 10, 11 via rotary bearings 16, 17 rotatably mounted and by means of axial bearings 18 in position to Coolant discharges 5 set.
  • the coolant discharge lines 5 open into the housing 12, each coolant discharge line 5 a diffuser 21 inserted into the housing 12 for sealing the bundling of the Coolant jets is assigned.
  • the clear width of the passage opening takes in the diffuser 21 linearly in the direction of flow and then expands in the shut-off device 6 erratic, so that the diameter of the through hole 15 is larger than the diameter the passage channel in the diffuser 21.
  • a flow stabilizer 22 is located in each coolant discharge line 5 to stabilize the flow built-in, of two guide elements standing cross-shaped at right angles to each other 23, 24, preferably sheet metal is formed, through which the open cross-sectional area of the coolant drain is divided into four segments of equal size over a limited distance.

Abstract

A cooling system for hot rolled metal strip has the strip passing under a curtain of coolant dropped by a line of dropper tubes fitted to a tank mounted over the strip feed. Each dropper pipe is fitted with a valve (6) which opens and closes the coolant flow via a common control (8). This enables the operator shut off the coolant rapidly and without excess flow. The flow valves are operated by a slider or by a rotating drive shaft (7). The slider/shaft has seals (19) to contain the coolant. The ends of the dropper tubes are fitted with flow control apertures to generate the coolant curtain.

Description

Die Erfindung betrifft eine Kühlvorrichtung zum Kühlen eines heißen bewegten Metallbandes mittels laminarer Kühlmittelstrahlen, bestehend aus mindestens einem quer zur Bandlaufrichtung angeordneten Wasserkasten, in den mindestens eine Kühlmittelzuführleitung mündet und aus dem eine Vielzahl von im Abstand voneinander angeordneten Kühlmittelableitungen austreten.The invention relates to a cooling device for cooling a hot moving metal strip by means of laminar coolant jets, consisting of at least one transverse to the tape running direction arranged water box into which at least one coolant supply line opens and from which a plurality of spaced-apart coolant outlets emerge.

Die Abkühlung eines gewalzten Warmbandes im Bereich einer Warmwalzstraße, im besonderen am Auslaufrollgang einer Fertigstraße erfolgt üblicherweise in einer Laminarkühlstrecke. Das Warmband wird hierbei von laminaren Kühlwasserstrahlen abgekühlt, wobei die Kühlwirkung sehr stark von der Ausbildung dieser Kühlwasserstrahlen abhängt. Ein laminarer Kühlwasserstrahl führt zu einer deutlich stärkeren Abkühlung als ein turbulenter Strahl, da ein laminarer Kühlwasserstrahl in der Lage ist, die sich an der Warmbandoberfläche bildende Dampfschicht zu durchbrechen und so eine höhere Kühlwirkung zu erzielen.The cooling of a rolled hot strip in the area of a hot rolling mill, in Especially on the exit roller table of a finishing train, this is usually done in a laminar cooling section. The hot strip is cooled by laminar cooling water jets, whereby the cooling effect depends very much on the formation of these cooling water jets. A Laminar cooling water jet leads to a much stronger cooling than a turbulent one Jet, since a laminar cooling water jet is able to stick to the hot strip surface break through forming vapor layer and thus achieve a higher cooling effect.

Eine laminare Kühlwasserstrecke besteht im wesentlichen aus mehreren hintereinander angeordneten, sich quer zur Bandlaufrichtung erstreckenden Wasserkästen, wobei jeder Wasserkasten über eine Vielzahl von Kühlwasserableitungen verfügt. Eine derartige Kühlvorrichtung ist aus der DE-OS 21 07 664 bereits bekannt. Hier werden die Kühlwasserableitungen von quer zu Bandlaufrichtung nebeneinander angeordneten Siphonrohren gebildet, durch die das Kühlwasser auf die Bandoberfläche aufgebracht wird.A laminar cooling water section essentially consists of several in a row arranged, extending transversely to the tape running water boxes, each Water box has a variety of cooling water drains. Such Cooling device is already known from DE-OS 21 07 664. Here are the cooling water drains formed by siphon tubes arranged next to one another transversely to the direction of tape travel, through which the cooling water is applied to the belt surface.

Beim Einschalten der Kühlvorrichtung ist es erstrebenswert, daß sich der laminare Kühlwasserstrahl unmittelbar einstellt, um sofort eine gleichmäßige Kühlwirkung zu erreichen. Ein turbulenter Kühlwasserstrahl würde nach dem Einschalten zu einer verminderten und nicht reproduzierbaren Kühlwirkung führen. Ebenso ist eine definierte Situation beim Abschalten der Kühlvorrichtung erforderlich. Nachteilig bei Kühlvorrichtungen der oben zitierten Art ist, daß nach dem Abschalten der Kühlvorrichtung noch beträchtliche Mengen an Kühlwasser nachfließen, wobei dieses Nachfließen teilweise völlig ungleichmäßig erfolgt, sodaß wiederum nicht reproduzierbare Verhältnisse auftreten und nur eine sehr eingeschränkte Regelbarkeit gegeben ist.When switching on the cooling device, it is desirable that the laminar cooling water jet immediately to achieve an even cooling effect. A turbulent cooling water jet would decrease and not after switching on reproducible cooling effect. There is also a defined situation when switching off the Cooling device required. A disadvantage of cooling devices of the type cited above is that after switching off the cooling device, considerable amounts of cooling water still flow in, this subsequent flow is sometimes completely uneven, so again not reproducible conditions occur and only a very limited controllability is given is.

Aufgabe der Erfindung ist es daher diese Nachteile zu vermeiden und eine Kühlvorrichtung zum Kühlen eines heißen bewegten Metallbandes mittels laminarer Kühlmittelstrahlen vorzuschlagen, bei der nicht nur während des laufenden Betriebes sondern auch in der Einschalt- und Abschaltphase der Kühlvorrichtung gleichmäßige Strömungsverhältnisse in den Kühlmittelstrahlen auftreten und insbesondere nach dem Abschalten ein unkontrolliertes Nachfließen von Kühlmittel sicher vermieden wird.The object of the invention is therefore to avoid these disadvantages and a cooling device to propose to cool a hot moving metal strip by means of laminar coolant jets, which not only during operation but also in the switch-on and Shutdown phase of the cooling device uniform flow conditions in the coolant jets occur and especially after switching off an uncontrolled flow of Coolant is safely avoided.

Diese Aufgabe wird dadurch gelöst, daß jeder Kühlmittelableitung austrittsseitig ein Absperrorgan zugeordnet ist. Das Absperrorgan ist als Schieber oder Kugelhahn ausgebildet.This object is achieved in that each coolant discharge has a shut-off device on the outlet side assigned. The shut-off device is designed as a slide or ball valve.

Eine wesentliche Vereinfachung der Kühleinrichtung ergibt sich dadurch, däß mehrere oder alle der einzelnen Kühlmittelableitungen zugeordneten Absperrorgane mechanisch gekoppelt und mit einem gemeinsamen Verstellantrieb verbunden sind.A significant simplification of the cooling device results from the fact that several or all shut-off devices assigned to the individual coolant discharge lines are mechanically coupled and are connected to a common adjustment drive.

Eine vorteilhafte Ausgestaltung besteht darin, daß die mechanisch gekoppelten Absperrorgane von einer Schaltwelle gebildet sind, die quer zur Längsachse der Schaltwelle im Abstand der Kühlmittelableitungen zueinander Durchgangsöffnungen aufweist und die mit einem Verstellantrieb von einer Position in der die Durchgangsöffnungen mit den Kühlmittelableitungen fluchten in eine Position, in der die Schaltwelle die Kühlmittelableitungen sperrt, verstellbar ist und umgekehrt. Hierbei ist die Schaltwelle in einem mehrteiligen Gehäuse gelagert, in welches die Kühlmittelableitungen münden, und im Bereich der von Durchgangsöffnungen durchsetzten Schaltwelle in die Gehäuseschalen eingesetzte ringförmige Dichtschalen angeordnet sind, welche mit den Kühlmittelableitungen uind den die Schaltwelle durchsetzenden Durchgangsöffnungen fluchtende Durchtrittsöffnungen aufweisen.An advantageous embodiment is that the mechanically coupled shut-off devices are formed by a shift shaft which is transverse to the longitudinal axis of the shift shaft at a distance of Coolant discharges to each other through openings and that with an adjustment drive from a position in which the through openings with the coolant drains aligned in a position in which the selector shaft blocks the coolant discharge is adjustable and vice versa. Here, the selector shaft is mounted in a multi-part housing, in which the coolant drains open, and in the area penetrated by through openings Switching shaft in the housing shells inserted annular sealing shells are arranged, which with the coolant discharge lines and the through openings penetrating the selector shaft have aligned through openings.

Eine weitere Stabilisierung der Strömungsverhältnisse wird dadurch erzielt, daß jeder Kühlmittelableitung ein Diffusor zur Bündelung des Kühlmittelstrahles zugeordnet ist, wobei das Absperrorgan dem Diffusor nachgeordnet ist und der Durchmesser der Durchgangsöffnung größer ist als der Durchmesser der Austrittsöffnung im Diffusor. A further stabilization of the flow conditions is achieved in that each coolant drain a diffuser for bundling the coolant jet is assigned, the Shut-off device is arranged downstream of the diffuser and the diameter of the through opening is larger than the diameter of the outlet opening in the diffuser.

Nach einer weiteren vorteilhaften Ausgestaltung sind die Kühlmittelableitungen als Fallrohre ausgebildet, die im Wasserkasten im wesentlichen vertikal nach oben ragen. Gegenüber den aus der DE-OS 21 07 664 bekannten U-Rohren ergeben sich fertigungstechnische Vorteile, die zu einer wesentlichen Verbilligung der Kühleinrichtung führen. Insgesamt entsteht eine wesentlich kompaktere Baugruppe, wodurch die Gefahr von Schäden durch aufsteigendes oder steckengebliebenes Band deutlich vermindert wird.According to a further advantageous embodiment, the coolant discharge lines are downpipes trained, which project substantially vertically upwards in the water tank. Opposite the from DE-OS 21 07 664 known U-tubes result in manufacturing advantages that lead to a substantial reduction in the cost of the cooling device. Overall, one emerges significantly more compact assembly, eliminating the risk of damage from rising or getting stuck Band is significantly reduced.

Eine Verbesserung der Strömungsverhältnisse ergibt sich weiters dadurch, daß in jede Kühlmittelableitung ein Strömungsstabilisator eingebaut ist. Dieser Strömungsstabilisator ist von mindestens einem Einsatz gebildet, der vorzugsweise aus zwei im rechten Winkel zueinander stehenden, in die Kühlmittelableitung eingesetzten und die Querschnittsfläche der Kühlmittelableitung in Segmente teilenden Leitelementen, vorzugsweise Blechen zusammengesetzt ist.An improvement in the flow conditions also results from the fact that in each Coolant drainage a flow stabilizer is installed. This flow stabilizer is formed by at least one insert, preferably of two at right angles to each other, inserted in the coolant drain and the cross-sectional area of the Coolant drainage in segments dividing guide elements, preferably composed of sheets is.

Weitere Vorteile und Merkmale der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung eines nicht einschränkenden Ausführungsbeispieles, wobei auf die beiliegenden Figuren Bezug genommen wird, die folgendes zeigen:

Fig. 1
einen Längsschnitt durch eine erfindungsgemäße Kühlvorrichtung zum Kühlen eines Metallbandes,.
Fig. 2
einen Querschnitt durch eine erfindungsgemäße Kühlvorrichtung zum Kühlen eines Metallbandes,
Fig. 3
einen Querschnitt durch das Absperrorgan.
Further advantages and features of the present invention result from the following description of a non-restrictive exemplary embodiment, reference being made to the accompanying figures, which show the following:
Fig. 1
a longitudinal section through a cooling device according to the invention for cooling a metal strip ,.
Fig. 2
3 shows a cross section through a cooling device according to the invention for cooling a metal strip,
Fig. 3
a cross section through the shut-off device.

Fig. 1 zeigt eine mögliche Ausführungsform der erfindungsgemäßen Kühlvorrichtung zum Kühlen eines bewegten heißen Metallbandes 1 mittels laminarer Kühlmittelstrahlen. Als Kühlmittel wird gereinigtes und gegebenenfalls aufbereitetes Wasser verwendet. Das heiße Metallband 1 wird hierbei auf einem durch eine Rollgangsrolle 2 angedeuteten Transportrollgang aus einer nicht dargestellten Walzstraße oder einem einzelnen Walzgerüst ausgefordert und im Abstand unterhalb der Kühlvorrichtung mit einer vorgewählten Transportgeschwindigkeit transportiert. Die Kühlvorrichtung besteht aus mehreren hintereinander in Bandlaufrichtung angeordneten Wasserkästen 3, von denen einer in den Fig. 1 und 2 dargestellt ist. Der Wasserkasten 3 weist eine zentrale Kühlmittelzufuhr 4 und eine Vielzahl von in zwei Reihen angeordneten Kühlmittelableitungen 5 auf (Fig. 2), die als Fallrohre ausgebildet sind und im Inneren des Wasserkastens 3 vertikal nach oben ragen. Austrittsseitig schließen an die Kühlmittelableitungen 5 Absperrorgane 6 an, mit denen der Austritt von Kühlmittel aus allen Kühlmittelableitungen 5 gleichzeitig unterbrochen oder in Gang gesetzt werden kann. Die Art der Absperrorgane ist weitgehend beliebig wählbar. Einschränkend ist hierbei nur zu berücksichtigen, daß der das Absperrorgan 6 verlassende Kühlmittelstrahl laminare Strömungseigenschaften aufweisen muß. Die Absperrorgane 6 können beispielsweise als Schieber oder Kugelhähne ausgebildet sein. In Fig. 1 und Fig. 2 sind die Absperrorgane 6 durch eine gemeinsame Schaltwelle 7 gekoppelt, die über ein Gestänge 8 mit einem gemeinsamen Verstellantrieb 9 verbunden ist.Fig. 1 shows a possible embodiment of the cooling device according to the invention for Cooling a moving hot metal strip 1 by means of laminar coolant jets. As Coolant is cleaned and, if necessary, treated water is used. The hot Metal strip 1 is in this case on a transport roller table indicated by a roller table roller 2 challenged from a rolling mill, not shown, or a single roll stand and at a distance below the cooling device with a preselected transport speed transported. The cooling device consists of several in a row Water boxes 3 arranged in the direction of belt travel, one of which is shown in FIGS. 1 and 2 is shown. The water tank 3 has a central coolant supply 4 and a large number of coolant discharge lines 5 arranged in two rows (FIG. 2), which serve as downpipes are formed and protrude vertically upwards inside the water box 3. Exit side connect to the coolant discharge lines 5 shut-off devices 6, with which the exit of Coolant from all coolant discharge lines 5 interrupted or started at the same time can be. The type of shut-off device is largely arbitrary. Is restrictive only to be taken into account here that the coolant jet leaving the shut-off device 6 must have laminar flow properties. The shut-off devices 6 can for example be designed as a slide or ball valves. The shut-off elements 6 are shown in FIGS. 1 and 2 coupled by a common switching shaft 7, which is connected to a common adjustment drive 9 is connected.

In Fig. 3 ist dieses durch eine durchgehende Schaltwelle 7 und ein mehrteiliges Gehäuse 10, 11, 12 zu einem einzigen kompakten Bauteil verbundene Absperrorgan 6 im Detail dargestellt. Die Schaltwelle 7 ist im Abstand der Mittelachsen 13, 14 der Kühlmittelableitungen 5 von Durchgangsöffnungen 15 durchsetzt, die in der Offen-Position der Schaltwelle 7 mit den Kühlmittelableitungen 5 fluchten. Mit dem Verstellantrieb 9 ist die Schaltwelle 7 in eine um 90° verschwenkte, den Durchfluß des Kühlmittels sperrende Geschlossen-Position verdrehbar. Die Schaltwelle 7 ist in einem von zwei Gehäuseschalen 10, 11 gebildeten zweiteiligen Gehäuse über Radiallager 16, 17 drehbar gelagert und mittels Axiallager 18 in ihrer Positon zu den Kühlmittelableitungen 5 festgelegt. Im Bereich der die Schaltwelle 7 durchsetzenden Durchgangsöffnungen 15 sind in die Gehäuseschalen 10, 11 eingesetzte, ringförmige, die Schaltwelle 7 umgreifende Dichtschalen 19 eingesetzt, die mit den Kühlmittelableitungen 5 und den Durchgangsöffnungen 15 der Schaltwelle 7 fluchtende Durchtrittsöffnungen 20 aufweisen. Die Kühlmittelableitungen 5 münden im Gehäuse 12, wobei jeder Kühlmittelableitung 5 ein in das Gehäuse 12 dichtend eingesetzter Diffusor 21 zur Bündelung der Kühlmittelstrahlen zugeordnet ist. Die lichte Weite der Durchtrittsöffnung nimmt im Diffusor 21 in Strömungsrichtung linear ab und erweitert sich im Anschluß daran im Absperrorgan 6 sprunghaft, sodaß der Durchmesser der Durchgangsöffnung 15 größer ist als der Durchmesser der Durchtrittskanal im Diffusor 21.In Fig. 3 this is by a continuous shift shaft 7 and a multi-part housing 10, 11, 12 to a single compact component shutoff 6 shown in detail. The control shaft 7 is at a distance from the central axes 13, 14 of the coolant lines 5 from Passages through 15, which in the open position of the shift shaft 7 with the Coolant lines 5 are aligned. With the adjustment drive 9, the selector shaft 7 is in a 90 ° pivoted closed position blocking the flow of the coolant is rotatable. The Switch shaft 7 is in a two-part housing formed by two housing shells 10, 11 via rotary bearings 16, 17 rotatably mounted and by means of axial bearings 18 in position to Coolant discharges 5 set. In the area of the shaft 7 passing through Through openings 15 are inserted into the housing shells 10, 11, the Switch shaft 7 encompassing sealing shells 19 used with the coolant discharge lines 5th and the through openings 15 of the selector shaft 7 are aligned through openings 20 exhibit. The coolant discharge lines 5 open into the housing 12, each coolant discharge line 5 a diffuser 21 inserted into the housing 12 for sealing the bundling of the Coolant jets is assigned. The clear width of the passage opening takes in the diffuser 21 linearly in the direction of flow and then expands in the shut-off device 6 erratic, so that the diameter of the through hole 15 is larger than the diameter the passage channel in the diffuser 21.

Zur Stabilisierung der Strömung ist in jeder Kühlmittelableitung 5 ein Strömungsstabilisator 22 eingebaut, der von zwei in rechten Winkel kreuzförmig zueinander stehenden Leitelementen 23, 24, vorzugsweise Blechen gebildet ist, durch die die offene Querschnittsfläche der Kühlmittelableitung aufeiner begrenzten Wegstrecke in vier gleich große Segmente geteilt wird.A flow stabilizer 22 is located in each coolant discharge line 5 to stabilize the flow built-in, of two guide elements standing cross-shaped at right angles to each other 23, 24, preferably sheet metal is formed, through which the open cross-sectional area of the coolant drain is divided into four segments of equal size over a limited distance.

Claims (10)

Kühlvorrichtung zum Kühlen eines heißen bewegten Metallbandes (1) mittels laminarer Kühlmittelstrahlen, bestehend aus mindestens einem quer zur Bandlaufrichtung angeordneten Wasserkasten (3), in den mindestens eine Kühlmittelzuführleitung (4) mündet und aus dem eine Vielzahl von im Abstand voneinander angeordneten Kühlmittelableitungen (5) austreten, dadurch gekennzeichnet, daß jeder Kühlmittelableitung (5) austrittsseitig ein Absperrorgan (6) zugeordnet ist.Cooling device for cooling a hot moving metal strip (1) by means of laminar coolant jets, consisting of at least one water box (3) arranged transversely to the strip running direction, into which at least one coolant supply line (4) opens and from which a multiplicity of coolant lines (5) arranged at a distance from one another emerge, characterized in that each coolant discharge (5) is assigned a shut-off device (6) on the outlet side. Kühlvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Absperrorgan (6) als Schieber ausgebildet ist.Cooling device according to claim 1, characterized in that the shut-off element (6) is designed as a slide. Kühlvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Absperrorgan (6) als Kugelhahn ausgebildet ist.Cooling device according to claim 1, characterized in that the shut-off element (6) is designed as a ball valve. Kühlvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß mehrere oder alle der einzelnen Kühlmittelableitungen (5) zugeordneten Absperrorgane (6) mechanisch gekoppelt und mit einem gemeinsamen Verstellantrieb (9) verbunden sind.Cooling device according to one of claims 1 to 3, characterized in that several or all shut-off elements (6) assigned to the individual coolant discharge lines (5) are mechanically coupled and connected to a common adjustment drive (9). Kühlvorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die mechanisch gekoppelten Absperrorgane (6) von einer Schaltwelle gebildet (7) gebildet sind, die quer zur Längsachse der Schaltwelle (7) im Abstand der Kühlmittelableitungen (5) zueinander Durchgangsöffnungen (15) aufweist und die mit einem Verstellantrieb (9) von einer Position in der die Durchgangsöffnungen (15) mit den Kühlmittelableitungen (5) fluchten in eine Position, in der die Schaltwelle (7) die Kühlmittelableitungen (5) sperrt, verstellbar ist und umgekehrt.Cooling device according to claim 4, characterized in that the mechanically coupled shut-off elements (6) are formed by a control shaft (7) which has through openings (15) at right angles to the longitudinal axis of the control shaft (7) at a distance from the coolant lines (5) and which with an adjustment drive (9) from a position in which the through openings (15) are aligned with the coolant lines (5) to a position in which the selector shaft (7) blocks the coolant lines (5), is adjustable and vice versa. Kühlvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Schaltwelle (7) in einem mehrteiligen Gehäuse (10, 11) gelagert ist, in welches die Kühlmittelableitungen (5) münden, und im Bereich der von Durchgangsöffnungen (15) durchsetzten Schaltwelle (7) in die Gehäuseschalen eingesetzte ringförmige Dichtschalen (19) angeordnet sind, welche mit den Kühlmittelableitungen (5) und den die Schaltwelle (7) durchsetzenden Durchgangsöffnungen (15) fluchtende Durchtrittsöffnungen (20) aufweisen.Cooling device according to claim 5, characterized in that the control shaft (7) is mounted in a multi-part housing (10, 11) into which the coolant discharge lines (5) open, and in the area of the control shaft (7) penetrated by through-openings (15) the housing shells are arranged in the form of annular sealing shells (19) which, with the coolant discharge lines (5) and the through openings (15) penetrating the switching shaft (7), have through openings (20) in alignment. Kühlvorrichtung nach einem der Ansprüche 1 und 4 bis 6, dadurch gekennzeichnet, daß jeder Kühlmittelableitung (5) zusätzlich ein Diffusor (21) zur Bündelung des Kühlmittelstrahles zugeordnet ist, wobei das Absperrorgan (6) dem Diffusor (21) nachgeordnet ist und der Durchmesser der Durchgangsöffnung (15) größer ist als der Durchmesser der Austrittsöffnung im Diffusor (21).Cooling device according to one of claims 1 and 4 to 6, characterized in that each coolant discharge (5) is additionally assigned a diffuser (21) for bundling the coolant jet, the shut-off element (6) being arranged downstream of the diffuser (21) and the diameter of the Through opening (15) is larger than the diameter of the outlet opening in the diffuser (21). Kühlvorrichtung nach einem der Ansprüche 1 und 4 bis 7, dadurch gekennzeichnet, daß die Kühlmittelableitungen (6) als Fallrohre ausgebildet sind, die im Wasserkasten (3) im wesentlichen vertikal nach oben ragen.Cooling device according to one of claims 1 and 4 to 7, characterized in that the coolant discharge lines (6) are constructed as downpipes which project substantially vertically upwards in the water tank (3). Kühlvorrichtung nach einem der Ansprüche 1 und 4 bis 8, dadurch gekennzeichnet, daß in jede Kühlmittelableitung (5) ein Strömungsstabilisator (22) eingebaut ist.Cooling device according to one of claims 1 and 4 to 8, characterized in that a flow stabilizer (22) is installed in each coolant discharge line (5). Kühlvorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß der Strömungsstabilisator (22) von mindestens einem Einsatz gebildet ist, der vorzugsweise zwei im rechten Winkel zueinanderstehenden, in die Kühlmittelableitung eingesetzten und die Querschnittsfläche der Kühlmittelableitung in Segmente teilenden Leitelementen (23, 24), vorzugsweise Blechen zusammengesetzt ist.Cooling device according to claim 9, characterized in that the flow stabilizer (22) is formed by at least one insert, which is preferably two guide elements (23, 24), preferably sheets, which are at right angles to one another and are inserted into the coolant discharge and divide the cross-sectional area of the coolant discharge into segments is composed.
EP98122254A 1997-12-18 1998-11-23 Cooling device for cooling a moving hot metal strip Expired - Lifetime EP0924003B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT213897 1997-12-18
AT0213897A AT406834B (en) 1997-12-18 1997-12-18 COOLING DEVICE FOR COOLING A HOT MOVING METAL STRIP

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EP0924003A2 true EP0924003A2 (en) 1999-06-23
EP0924003A3 EP0924003A3 (en) 2000-08-16
EP0924003B1 EP0924003B1 (en) 2002-10-16

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EP98122254A Expired - Lifetime EP0924003B1 (en) 1997-12-18 1998-11-23 Cooling device for cooling a moving hot metal strip

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EP (1) EP0924003B1 (en)
AT (2) AT406834B (en)
DE (1) DE59805962D1 (en)

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CN102266831B (en) * 2011-07-08 2012-11-07 东北大学 Cooling device capable of forming high-density jet stream and producing method thereof
CN108941222A (en) * 2018-09-28 2018-12-07 南京先河工程技术有限公司 A kind of closed cooling water tank device of modularized design and quick change method

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ATA213897A (en) 2000-02-15
ATE226118T1 (en) 2002-11-15
AT406834B (en) 2000-09-25
DE59805962D1 (en) 2002-11-21
EP0924003B1 (en) 2002-10-16
EP0924003A3 (en) 2000-08-16
US6178768B1 (en) 2001-01-30

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