EP0662359A1 - Device for sealing without contact a gap on the outlet of a rolling stand - Google Patents

Device for sealing without contact a gap on the outlet of a rolling stand Download PDF

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Publication number
EP0662359A1
EP0662359A1 EP94120060A EP94120060A EP0662359A1 EP 0662359 A1 EP0662359 A1 EP 0662359A1 EP 94120060 A EP94120060 A EP 94120060A EP 94120060 A EP94120060 A EP 94120060A EP 0662359 A1 EP0662359 A1 EP 0662359A1
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EP
European Patent Office
Prior art keywords
gap
nozzle
roll
work roll
partitioning element
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
EP94120060A
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German (de)
French (fr)
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EP0662359B1 (en
Inventor
Wolfgang Denker
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SMS Siemag AG
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SMS Schloemann Siemag AG
Schloemann Siemag AG
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Publication of EP0662359A1 publication Critical patent/EP0662359A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • 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
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0278—Cleaning devices removing liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally

Definitions

  • the object is achieved with the invention by the features specified in claim 1, with the first being surprisingly effective and uncomplicated for a long time
  • the gap between the partition and the work roll is sealed with an energy-rich flow emerging from a gap nozzle.
  • the function is based on the effect of the "Prandtl-Meyer corner flow”.
  • the inventive design of the end-side partition element with its tapered end part and its arrangement relative to the work roll ensures that an injector-like flow cross section is formed between the latter and the roll. This creates a vacuum under the effect of the one-sided expanding, high-energy jet. As a result, large amounts of air are drawn in through the gap between the partitioning element and the roller and flow in the direction of the wet area.
  • blow-off and suction integrated into the partition in the tightest of spaces effectively supports the fume extraction and the belt edge blow-off and enables the dripping wet surfaces to dry quickly in the outlet of a rolling or reservation rolling mill.
  • the device can be used above and below the belt run. The arrangement can be used in many places on a rolling mill with the belt running or rotating where it is necessary to separate different air spaces.
  • FIG. 1 shows an end-side partition element (2) of the device shown completely in FIG. 2.
  • the partitioning element (2) or its end part (3) is arranged approximately tangentially to the surface of the work roll (20) and at a relatively short distance from it as well as to the surface (31) of the rolling stock (30), forming a contact-free gap.
  • It has at least one supply duct (11) for compressed air, which is connected to a compressed air source (10) and opens into a gap nozzle (12) which extends a short distance along the roll surface in the direction of the roll axis. From this the compressed air supplied with pressures between 0.5 and 4 bar emerges, forming an energy-rich air jet that covers the width of the roller (20).
  • An angle (alpha) is formed between the blow-out direction (yy) of the gap nozzle (12) and a normal (zz) extending from the nozzle mouth (13) to the axis of rotation of the work roll (20), which is in the direction of rotation of the roll (20) 0 and 45 degrees, preferably 30 degrees.
  • the air jet After leaving the nozzle gap (12), the air jet expands. Due to the air jet bursting on one side and redirected at an angle (alpha), the injector-like air is constantly expanding Flow channel (25) negative pressure, which sucks up to 20 times the volume of the propellant jet in air through the gap between the partitioning element (2) and roller (20) with the aid of its suction effect. In this way, the gap between the partitioning element (2) and the work roll (20) can be effectively partitioned off by a defined air flow in the direction of the wet area, without this causing an air build-up.
  • a favorable form of flow of the propellant jet for forming a negative pressure in the flow channel (25) is achieved according to FIG. 1 in that the gap nozzle between a step (14) of the end part (3) and an adjustable guide element (15) which determines the width of the nozzle gap (17) ) is trained.
  • the gap of the nozzle (12) is adjustable in widths between 0.1 mm and 4 mm, the preferred width is 0.2 mm.
  • the expansion of the nozzle jet is further promoted by the fact that the guide element (15), viewed in cross section, merges from the direction of the nozzle gap (17) into a backward curved flow guide surface (16). This results in a bumpless, steady spreading of the jet for a strong suction effect.
  • the gap of the gap nozzle (12) can be relatively larger in the area of the cylinder (20), whereby larger amounts of air are extracted here.
  • the suction effect is supported in that the partitioning element (2) has suction channels (4) arranged in the area between its free end and the gap nozzle (12) in the end part (3), each suction channel (4) being inclined upwards at an acute angle (Beta ) is directed against the roller surface.
  • the partitioning element (2) has at least one water drainage channel (26) at a distance behind the gap nozzle (12).
  • Figure 2 shows the arrangement according to the invention in the installed state within the bulkhead (1).
  • This arrangement results in a very effective combination of blowing off the roller (20) and suctioning off the surface (31) of the rolling stock (30) in a comparatively small installation space.
  • the partitioning element (2) is arranged on the lower area of the bulkhead wall (1), the gap nozzle (12) being formed between it and its end part (3).
  • the end part (3) lies contactlessly with a small gap-shaped spacing approximately tangentially on the surface of the roller (20).
  • the gap nozzle (12) is connected to the supply channel (11) for compressed air.
  • Above the partitioning element (2) in the bulkhead (1) there is a trough (40) with side drain pipes (41).
  • the trough (40) is used to collect liquid droplets, which are reflected in the wet flow of the flow channel (25 Fig. 1).
  • 2 shows the arrangement of blowing nozzles (45) on a nozzle head (44). These have the task of blowing off the edges of the rolled material strip (30) from entrained liquid such as water and / or rolling oil.
  • the air space (47) between the rollers (20, 21) and the bulkhead (1) is connected to an extractor fan (48).
  • the device is straightforward due to the Fluidic design very effective and optimally fulfills the task set out above.

Abstract

Appts. for contactless sealing of a gap between a shield (1) and a work roll (20) at the exit of a rolling stand, in which the lower end of the shield (1) has a wiper unit (2) positioned tangentially to the roll surface relatively close to the latter and to the rolled strip (30). The wiper unit (2) has passages (11) connected to a compressed air supply (10) terminating in a nozzle slot (12) extending in close proximity along the roll surface in a direction at an angle ( alpha ) to a radial line (z-z) between nozzle exit and roll axis of between 0 and 45 degrees pref. 30 degrees in the direction of roll rotation. The wiper unit (2) has a sharp taper end piece (3), the upper surface of which is approximately tangential to the roll surface and in close proximity to the latter, and forms a divergent air channel (25) between it and the roll surface in the manner of an injector at least over the width of the rolled material.

Description

Im Auslauf von Walzwerken wird die Qualität eines Bandes entscheidend durch Trockenheit und Sauberkeit der Bandoberfläche beeinflußt. In der Praxis werden z. Zt. sehr unterschiedliche Arten von Abblasungen, Abschottungen und/oder Absaugungen sowie deren Kombinationen eingesetzt. Jedoch konnte bisher keine befriedigende Lösung gefunden werden. Dies liegt daran, daß bei Abblasungen dicht hinter der letzten Arbeitswalze ein Luftstau entsteht, wodurch Feuchtigkeit in Form von Tropfen und/oder andere Partikel auf das Band zurückfallen und somit die Bandqualität mindern. Um die sich hieraus ergebenden Schwierigkeiten zu überwinden, wurden bereits Kombinationen von Abblasungen und Absaugungen im Bereich eines Walzwerksauslaufs eingesetzt. Damit sind jedoch andere Nachteile verbunden, weil z. B. derartige Kombinationen infolge der großen mit Druck bzw. Unterdruck zu fördernden Luftmassen sehr aufwendig und teuer und damit unwirtschaftlich sind. Für große Luftmengen ausgelegt, verbauen sie zudem für andere Einrichtungen dringend benötigten Platz. Wenn zur Abhilfe dieser Schwierigkeit Abblasungen oder deren Kombination mit Absaugungen weiter in Richtung Auslauf positioniert werden, verlieren sie mit zunehmender Distanz erheblich an Wirkung und die Feuchtigkeit bleibt am Band haften.In the outlet of rolling mills, the quality of a strip is decisively influenced by the dryness and cleanliness of the strip surface. In practice, e.g. Currently, very different types of blow-offs, partitions and / or suction devices and their combinations are used. However, no satisfactory solution has yet been found. This is due to the fact that when there are blows just behind the last work roll, an air build-up occurs, as a result of which moisture in the form of drops and / or other particles fall back onto the belt and thus reduce the belt quality. In order to overcome the resulting difficulties, combinations of blow-offs and suction devices have already been used in the area of a rolling mill outlet. However, there are other disadvantages because z. B. such combinations are very complex and expensive and therefore uneconomical due to the large air masses to be promoted with pressure or vacuum. Designed for large amounts of air, they also obstruct space that is urgently needed for other facilities. If, to remedy this difficulty, blow-offs or their combination with suction devices are positioned further towards the outlet, they lose their effectiveness considerably with increasing distance and the moisture remains on the belt be liable.

Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung zum berührungsfreien Abdichten eines Spaltes im Auslauf eines Walzgerüstes so auszubilden, daß man unter Vermeidung der vorgenannten Schwierigkeiten und technischen Grenzen ein trockenes und sauberes Band erhält, wobei folgende Bedingungen zu erfüllen sind:

  • 1. Der gesamte Auslaufbereich des Bandes muß gegenüber Walzöl, das sich hinter dem Walzspalt im Auslauf befindet, oberhalb und unterhalb des Bandes abgeschottet sein;
  • 2. Spalten zwischen rotierenden, feststehenden oder linear bewegten Teilen müssen berührungsfrei mit einem definierten Luftstrom abgedichtet bzw. abgeschottet werden. Es ist eine anerkannte Forderung, daß an den Walzen keine Dichtungen schleifend anliegen dürfen;
  • 3. nasse Flächen, insbesondere in Reversiergerüsten, müssen mit Hilfe einer großen trockenen Luftmenge schnell getrocknet werden;
  • 4. mitgerissene Flüssigkeit seitlich der Bandkanten muß unmittelbar hinter dem Walzspalt abgelenkt werden, weil erfahrungsgemäß Flüssigkeitstropfen (Emulsion/Walzöl) nach Erreichen der Bandgeschwindigkeit nicht mehr mit Luft weggeblasen werden können.
Proceeding from this, the object of the invention is to design a device for the contact-free sealing of a gap in the outlet of a roll stand in such a way that a dry and clean strip is obtained while avoiding the aforementioned difficulties and technical limits, the following conditions being met:
  • 1. The entire outlet area of the strip must be sealed off from the rolling oil located behind the roll gap in the outlet, above and below the strip;
  • 2. Gaps between rotating, stationary or linearly moving parts must be sealed or sealed off without contact with a defined air flow. It is a recognized requirement that seals should not be rubbing against the rollers;
  • 3. Wet surfaces, especially in reversing stands, must be dried quickly using a large amount of dry air;
  • 4. entrained liquid to the side of the strip edges must be deflected immediately behind the roll gap, because experience has shown that liquid drops (emulsion / rolling oil) can no longer be blown away with air after the strip speed has been reached.

Die Lösung der Aufgabe gelingt mit der Erfindung durch die im Anspruch 1 angegebenen Merkmale, wobei erstmals in überraschend wirksamer und unkomplizierter Weise ein langer Spalt zwischen Abschottung und Arbeitswalze mit einer aus einer Spaltdüse austretenden energiereichen Strömung abgedichtet wird. Die Funktion beruht auf der Wirkung der "Prandtl-Meyer-Eckenströmung". Durch die erfindungsgemäße Ausbildung des endseitigen Abschottungselementes mit dessen schneidenartig verjüngtem Endteil und seiner Anordnung relativ zur Arbeitswalze wird erreicht, daß sich zwischen diesem und der Walze ein injektorartig erweiterter Strömungsquerschnitt bildet. In diesem entsteht unter der Wirkung des einseitig expandierenden, energiereichen Düsenstrahles ein Unterdruck. Dadurch werden große Mengen an Luft durch den Spalt zwischen Abschottungselement und Walze angesaugt, die in Richtung Naßbereich strömen. Hierdurch wird der Luftstau erheblich reduziert und es bildet sich eine definierte Strömung zwischen Abschottung und Walzgut, in deren Bereich die nasse Luft mit Tropfen und anderen Partikeln abgesaugt wird. Die auf diese Weise in die Abschottung auf engstem Raum integrierte Kombination aus Abblasung und Absaugung unterstützt wirksam die Dunstabsaugung sowie die Bandkantenabblasung und ermöglicht eine schnelle Trocknung der tropfnassen Flächen im Auslauf eines Walz- bzw. Reservierwalzwerkes. Die Vorrichtung läßt sich oberhalb und unterhalb des Bandlaufes einsetzen. Die Anordnung kann an vielen Stellen einer Walzstraße bei laufendem Band oder rotierendem Walzen dort eingesetzt werden, wo es erforderlich ist, unterschiedliche Lufträume zu trennen.The object is achieved with the invention by the features specified in claim 1, with the first being surprisingly effective and uncomplicated for a long time The gap between the partition and the work roll is sealed with an energy-rich flow emerging from a gap nozzle. The function is based on the effect of the "Prandtl-Meyer corner flow". The inventive design of the end-side partition element with its tapered end part and its arrangement relative to the work roll ensures that an injector-like flow cross section is formed between the latter and the roll. This creates a vacuum under the effect of the one-sided expanding, high-energy jet. As a result, large amounts of air are drawn in through the gap between the partitioning element and the roller and flow in the direction of the wet area. This considerably reduces the air build-up and a defined flow is formed between the bulkhead and the rolling stock, in the area of which the wet air is sucked off with drops and other particles. The combination of blow-off and suction integrated into the partition in the tightest of spaces effectively supports the fume extraction and the belt edge blow-off and enables the dripping wet surfaces to dry quickly in the outlet of a rolling or reservation rolling mill. The device can be used above and below the belt run. The arrangement can be used in many places on a rolling mill with the belt running or rotating where it is necessary to separate different air spaces.

Weitere Ausgestaltungen der Erfindung sind entsprechend den Merkmalen der Unteransprüche vorgesehen. Die Erfindung wird in schematischen Zeichnungen in einer bevorzugten Ausführungsform gezeigt, wobei aus den Zeichnungen weitere vorteilhafte Einzelheiten der Erfindung entnehmbar sind.Further refinements of the invention are provided in accordance with the features of the subclaims. The invention is shown in schematic drawings in a preferred embodiment, further advantageous details of the invention being apparent from the drawings.

Es zeigen:

Fig. 1
in Seitenansicht ein endseitiges Abschottungselement der Vorrichtung mit Ausbildung einer Spaltdüse, teilweise im Schnitt,
Fig. 2
eine vollständige Vorrichtung zum berührungsfreien Abdichten eines Spaltes zwischen Abschottung und Arbeitswalze, in Seitenansicht.
Show it:
Fig. 1
in side view an end-side partition element of the device with the formation of a gap nozzle, partly in section,
Fig. 2
a complete device for contactless sealing of a gap between the partition and work roll, in side view.

Figur 1 zeigt ein endseitiges Abschottungselement (2) der in Figur 2 komplett dargestellten Vorrichtung. Das Abschottungselement (2) bzw. dessen Endteil (3) ist unter Ausbildung eines berührungsfreien Spaltes annähernd tangential zur Oberfläche der Arbeitswalze (20) und in relativ geringem Abstand zu dieser sowie zur Oberfläche (31) des Walzgutes (30) angeordnet. Es weist wenigstens einen an eine Druckluftquelle (10) angeschlossenen Zufuhrkanal (11) für Druckluft auf, welcher in eine sich in Richtung der Walzenachse in geringem Abstand entlang der Walzenoberfläche erstreckende Spaltdüse (12) einmündet. Aus dieser tritt die mit Drücken zwischen 0,5 und 4 bar zugeführte Druckluft unter Ausbildung eines energiereichen und die Breite der Walze (20) überdeckenden Luftstrahls aus. Dabei bildet sich zwischen der Ausblasrichtung (y-y) der Spaltdüse (12) und einer von der Düsenmündung (13) zur Rotationsachse der Arbeitswalze (20) verlaufenden Normalen (z-z) ein Winkel (Alpha) aus, der in Drehrichtung der Walze (20) zwischen 0 und 45 Grad, vorzugsweise 30 Grad beträgt. Nach Verlassen des Düsenspaltes (12) expandiert der Luftstrahl. Durch den einseitig aufgeplatzten und im Winkel (Alpha) umgelenkten Luftstrahl stellt sich in dem sich stetig erweiternden injektorartigen Strömungskanal (25) Unterdruck ein, der mit Hilfe seiner Saugwirkung ein bis zu 20-faches Volumen des Treibstrahles an Luft durch den Spalt zwischen Abschottungselement (2) und Walze (20) ansaugt. Auf diese Weise läßt sich der Spalt zwischen Abschottungselement (2) und Arbeitswalze (20) durch einen definierten Luftstrom in Richtung Naß-Bereich wirksam abschotten, ohne daß hierbei ein Luftstau entstehen kann.FIG. 1 shows an end-side partition element (2) of the device shown completely in FIG. 2. The partitioning element (2) or its end part (3) is arranged approximately tangentially to the surface of the work roll (20) and at a relatively short distance from it as well as to the surface (31) of the rolling stock (30), forming a contact-free gap. It has at least one supply duct (11) for compressed air, which is connected to a compressed air source (10) and opens into a gap nozzle (12) which extends a short distance along the roll surface in the direction of the roll axis. From this the compressed air supplied with pressures between 0.5 and 4 bar emerges, forming an energy-rich air jet that covers the width of the roller (20). An angle (alpha) is formed between the blow-out direction (yy) of the gap nozzle (12) and a normal (zz) extending from the nozzle mouth (13) to the axis of rotation of the work roll (20), which is in the direction of rotation of the roll (20) 0 and 45 degrees, preferably 30 degrees. After leaving the nozzle gap (12), the air jet expands. Due to the air jet bursting on one side and redirected at an angle (alpha), the injector-like air is constantly expanding Flow channel (25) negative pressure, which sucks up to 20 times the volume of the propellant jet in air through the gap between the partitioning element (2) and roller (20) with the aid of its suction effect. In this way, the gap between the partitioning element (2) and the work roll (20) can be effectively partitioned off by a defined air flow in the direction of the wet area, without this causing an air build-up.

Eine günstige Strömungsform des Treibstrahls zur Ausbildung eines Unterdrucks im Strömungskanal (25) wird nach Fig. 1 dadurch erreicht, daß die Spaltdüse zwischen einer Abstufung (14) des Endteils (3) und einem die Breite des Düsenspaltes (17) bestimmenden einstellbaren Leitorgan (15) ausgebildet ist. Der Spalt der Düse (12) ist in Breiten zwischen 0,1 mm und 4 mm einstellbar, die bevorzugte Breite beträgt 0,2 mm. Das Expandieren des Düsenstrahls wird weiterhin dadurch begünstigt, daß das Leitorgan (15), im Querschnitt gesehen, ausgehend von der Richtung des Düsenspaltes (17) in eine rückwärts gekrümmte Strömungsleitfläche (16) übergeht. Dadurch ergibt sich eine stoßfreie, stetige Ausbreitung des Düsenstrahls für eine kräftige Saugwirkung.A favorable form of flow of the propellant jet for forming a negative pressure in the flow channel (25) is achieved according to FIG. 1 in that the gap nozzle between a step (14) of the end part (3) and an adjustable guide element (15) which determines the width of the nozzle gap (17) ) is trained. The gap of the nozzle (12) is adjustable in widths between 0.1 mm and 4 mm, the preferred width is 0.2 mm. The expansion of the nozzle jet is further promoted by the fact that the guide element (15), viewed in cross section, merges from the direction of the nozzle gap (17) into a backward curved flow guide surface (16). This results in a bumpless, steady spreading of the jet for a strong suction effect.

Im Lynettenbereich der Walze (20) kann der Spalt der Spaltdüse (12) relativ größer sein, wodurch hier größere Luftmengen abgesaugt werden.The gap of the gap nozzle (12) can be relatively larger in the area of the cylinder (20), whereby larger amounts of air are extracted here.

Weiterhin wird die Saugwirkung dadurch unterstützt, daß das Abschottungselement (2) im Bereich zwischen seinem freien Ende und der Spaltdüse (12) im Endteil (3) angeordnete Ansaugkanäle (4) aufweist, wobei jeder Ansaugkanal (4) schräg aufwärts im spitzen Winkel (Beta) gegen die Walzenoberfläche gerichtet ist.Furthermore, the suction effect is supported in that the partitioning element (2) has suction channels (4) arranged in the area between its free end and the gap nozzle (12) in the end part (3), each suction channel (4) being inclined upwards at an acute angle (Beta ) is directed against the roller surface.

In Fig. 1 ist ferner gezeigt, daß das Abschottungselement (2) im Abstand hinter der Spaltdüse (12) wenigstens eine Wasserablaufrinne (26) aufweist. Dadurch wird im Luftstrom mitgerissene Flüssigkeit, die sich in Tropfenform auf dem Abschottungselement (2) niederschlägt, zur Seite abgeleitet und damit verhindert, daß Flüssigkeit zurückläuft.In Fig. 1 it is also shown that the partitioning element (2) has at least one water drainage channel (26) at a distance behind the gap nozzle (12). As a result, liquid entrained in the air stream, which is deposited in droplet form on the partitioning element (2), is discharged to the side and thus prevents liquid from running back.

Figur 2 zeigt die erfindungsgemäße Anordnung im Einbauzustand innerhalb der Schottwand (1). Diese Anordnung ergibt eine sehr wirksame Kombination von Abblasung der Walze (20) und Absaugung der Oberfläche (31) des Walzgutes (30) auf vergleichsweise engem Bauraum. Am unteren Bereich der Schottwand (1) ist das Abschottungselement (2) angeordnet, wobei zwischen diesem und dessen Endteil (3) die Spaltdüse (12) ausgebildet ist. Das Endteil (3) liegt berührungslos mit einem geringen spaltförmigen Abstand annähernd tangential an der Oberfläche der Walze (20) an. Die Spaltdüse (12) ist mit dem Zuführungskanal (11) für Druckluft verbunden. Oberhalb des Abschottungselementes (2) ist in der Schottwand (1) eine Abflußrinne (40) mit seitlichen Ablaufrohren (41) angeordnet. Die Abflußrinne (40) dient zum Auffangen von Flüssigkeitströpfchen, die sich aus der nassen Strömung des Strömungskanals (25 Fig. 1) niederschlagen. Weiterhin zeigt Fig. 2 die Anordnung von Blasdüsen (45) an einem Düsenkopf (44). Diese haben die Aufgabe, die Ränder des Walzgutbandes (30) von mitgeführter Flüssigkeit wie Wasser und/oder Walzöl abzublasen. Der Luftraum (47) zwischen den Walzen (20, 21) und der Schottwand (1) ist an eine Dunstabsaugung (48) angeschlossen.Figure 2 shows the arrangement according to the invention in the installed state within the bulkhead (1). This arrangement results in a very effective combination of blowing off the roller (20) and suctioning off the surface (31) of the rolling stock (30) in a comparatively small installation space. The partitioning element (2) is arranged on the lower area of the bulkhead wall (1), the gap nozzle (12) being formed between it and its end part (3). The end part (3) lies contactlessly with a small gap-shaped spacing approximately tangentially on the surface of the roller (20). The gap nozzle (12) is connected to the supply channel (11) for compressed air. Above the partitioning element (2) in the bulkhead (1) there is a trough (40) with side drain pipes (41). The trough (40) is used to collect liquid droplets, which are reflected in the wet flow of the flow channel (25 Fig. 1). 2 shows the arrangement of blowing nozzles (45) on a nozzle head (44). These have the task of blowing off the edges of the rolled material strip (30) from entrained liquid such as water and / or rolling oil. The air space (47) between the rollers (20, 21) and the bulkhead (1) is connected to an extractor fan (48).

Die Vorrichtung ist unkompliziert, durch die strömungstechnische Ausgestaltung sehr wirksam und erfüllt in optimaler Weise die eingangs gestellte Aufgabe.The device is straightforward due to the Fluidic design very effective and optimally fulfills the task set out above.

Claims (8)

Vorrichtung zum berührungsfreien Abdichten eines Spaltes zwischen einer Abschottung (1) und einer Arbeitswalze (20) im Auslauf eines Walzgerüstes, gekennzeichnet durch die Merkmale a) die Abschottung (1) weist ein endseitiges Abschottungselement (2) auf, welches annähernd tangential zur Oberfläche der Arbeitswalze (20) und in relativ geringem Abstand zu dieser sowie zur Oberfläche (31) des Walzgutes (30) angeordnet ist; b) das Abschottungselement (2) weist wenigstens einen an eine Druckluftquelle (10) angeschlossenen Zufuhrkanal (11) für Druckluft auf, welcher in eine sich in Richtung der Walzenachse in geringem Abstand entlang der Walzenoberfläche erstreckende Spaltdüse (12) einmündet; c) zwischen der Ausblasrichtung (y-y) der Spaltdüse (12) und einer von der Düsenmündung (13) zur Rotationsachse der Arbeitswalze (20) verlaufenden Normalen (z-z) ergibt sich ein Winkel (Alpha), der in Drehrichtung der Walze (20) zwischen 0 und 45°, und vorzugsweise 30° beträgt; d) das Abschottungselement (2) weist an seiner Vorderseite ein annähernd tangential und mit geringem Abstand zur Walzenoberfläche angeordnetes, sich schneidenartig verjüngendes Endteil (3) auf, welches derart ausgebildet und angeordnet ist, daß sich zwischen diesem und der Walzenoberfläche nach Art eines Injektors ein im Querschnitt stetig erweiternder Strömungskanal (25) bildet, der sich zumindest in der Breite des Walzgutes (30) achsparallel zur Arbeitswalze (20) erstreckt. Device for the contactless sealing of a gap between a partition (1) and a work roll (20) in the outlet of a roll stand, characterized by the features a) the bulkhead (1) has an end bulkhead element (2) which is arranged approximately tangentially to the surface of the work roll (20) and at a relatively short distance from it and to the surface (31) of the rolling stock (30); b) the partitioning element (2) has at least one supply duct (11) for compressed air which is connected to a compressed air source (10) and which opens into a gap nozzle (12) which extends in the direction of the roll axis at a small distance along the roll surface; c) between the blow-out direction (yy) of the gap nozzle (12) and a normal (zz) extending from the nozzle mouth (13) to the axis of rotation of the work roll (20), there is an angle (alpha) between the direction of rotation of the roll (20) 0 and 45 °, and preferably 30 °; d) the partitioning element (2) has on its front side an approximately tangential and at a short distance from the roller surface, cutting-like tapering end part (3), which is designed and arranged such that there is an injector between it and the roller surface in cross-section continuously expanding flow channel (25) that forms extends at least in the width of the rolling stock (30) axially parallel to the work roll (20). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Spaltdüse (12) zwischen einer Abstufung (14) des Endteils (3) des Abschottungselementes (2) und einem die Breite des Düsenspaltes (17) einstellbar bestimmenden Leitorgan (15) ausgebildet ist.Apparatus according to claim 1, characterized in that the gap nozzle (12) is formed between a step (14) of the end part (3) of the partitioning element (2) and a guide member (15) which determines the width of the nozzle gap (17) in an adjustable manner. Vorrichtung nach Anspruch 1 oder 2,dadurch gekennzeichnet, daß der Düsenspalt in Breiten zwischen 0,1 mm und 4 mm einstellbar ist und die bevorzugte Breite 0,2 mm beträgt, wobei im Lynettenbereich der Arbeitswalze (20) der Spalt relativ größer ist.Apparatus according to claim 1 or 2, characterized in that the nozzle gap is adjustable in widths between 0.1 mm and 4 mm and the preferred width is 0.2 mm, the gap being relatively larger in the area of the lamination of the work roll (20). Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Leitorgan (15), im Querschnitt gesehen, ausgehend von der Richtung des Düsenspaltes (17) in eine rückwärts gekrümmte Strömungsleitfläche (16) übergeht.Device according to one or more of claims 1 to 3, characterized in that the guide member (15), viewed in cross section, merges from the direction of the nozzle gap (17) into a backward curved flow guide surface (16). Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Endteil (3) im Bereich zwischen seinem freien Ende und der Spaltdüse (12) wenigstens einen dieses durchdringenden Ansaugkanal (4) aufweist, der schräg-aufwärts im spitzen Winkel (Beta) gegen die Walzenoberfläche gerichtet ist.Device according to one or more of claims 1 to 4, characterized in that the end part (3) in the area between its free end and the gap nozzle (12) has at least one suction channel (4) penetrating it, which is inclined upwards at an acute angle ( Beta) is directed against the roller surface. Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Abschottungselement (2) im Abstand hinter der Spaltdüse (12) wenigstens eine Wasserablaufrinne (26) aufweist.Device according to one or more of claims 1 to 5, characterized in that the partitioning element (2) has at least one water drainage channel (26) at a distance behind the gap nozzle (12). Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Abschottungselement (2) durch einen unteren Durchbruch in einem Teil der Schottwand (1) oder des Schwenkrahmens hindurchragend mit einem Schlitten an einer Führung angeordnet und mit Hilfe einer Antriebsvorrichtung linear verfahrbar und relativ zur Walzenoberfläche mit definiertem Abstand einstellbar ist.Device according to one or more of claims 1 to 6, characterized in that the partitioning element (2) projects through a lower opening in part of the bulkhead wall (1) or the swivel frame with a slide on a guide and can be moved linearly with the aid of a drive device and is adjustable relative to the roller surface with a defined distance. Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Luftraum (47) zwischen den Walzen (20, 21) und der Schottwand (1) an eine Dunstabsaugung (48) angeschlossen ist.Device according to one or more of claims 1 to 7, characterized in that the air space (47) between the rollers (20, 21) and the bulkhead wall (1) is connected to an extractor fan (48).
EP94120060A 1994-01-08 1994-12-17 Device for sealing without contact a gap on the outlet of a rolling stand Expired - Lifetime EP0662359B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4400423 1994-01-08
DE4400423 1994-01-08

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EP0662359A1 true EP0662359A1 (en) 1995-07-12
EP0662359B1 EP0662359B1 (en) 1998-03-25

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US (1) US5628223A (en)
EP (1) EP0662359B1 (en)
JP (1) JP3814307B2 (en)
KR (1) KR100337224B1 (en)
CN (1) CN1066647C (en)
DE (2) DE4422422A1 (en)
ES (1) ES2114651T3 (en)
TW (1) TW275661B (en)

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CN106424144A (en) * 2016-12-27 2017-02-22 中冶南方工程技术有限公司 Hot rolling work roll water scraping fuel injection system and method
EP3354362A1 (en) 2017-01-30 2018-08-01 Achenbach Buschhütten GmbH & Co. KG Method and device for reducing the rolling oil load of a rolled strip
WO2023165797A1 (en) 2022-03-01 2023-09-07 Sms Group Gmbh Scraping device

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CN102671972B (en) * 2012-05-04 2014-11-05 中冶南方工程技术有限公司 Process for cleaning and planishing non-degreased strip steel
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CN111050936B (en) * 2018-06-13 2022-08-30 诺维尔里斯公司 System and method for containing viscous material in roll processing
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DE102014222530A1 (en) 2014-05-05 2015-11-05 Sms Group Gmbh Band deflector and roller assembly
RU2657888C2 (en) * 2014-05-05 2018-06-18 Смс Груп Гмбх Deflection device for stripe and rolling system
CN106424144A (en) * 2016-12-27 2017-02-22 中冶南方工程技术有限公司 Hot rolling work roll water scraping fuel injection system and method
CN106424144B (en) * 2016-12-27 2018-04-17 中冶南方工程技术有限公司 A kind of Heat Working Rolls scrape water injection system and method
EP3354362A1 (en) 2017-01-30 2018-08-01 Achenbach Buschhütten GmbH & Co. KG Method and device for reducing the rolling oil load of a rolled strip
DE102017101713A1 (en) 2017-01-30 2018-08-02 Achenbach Buschhütten GmbH & Co. KG Method and device for reducing the rolling stock load of a rolled strip
WO2023165797A1 (en) 2022-03-01 2023-09-07 Sms Group Gmbh Scraping device
DE102022202100A1 (en) 2022-03-01 2023-09-07 Sms Group Gmbh scraper device

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CN1066647C (en) 2001-06-06
US5628223A (en) 1997-05-13
JPH07256329A (en) 1995-10-09
DE4422422A1 (en) 1995-07-13
TW275661B (en) 1996-05-11
EP0662359B1 (en) 1998-03-25
DE59405529D1 (en) 1998-04-30
JP3814307B2 (en) 2006-08-30
KR950031260A (en) 1995-12-18
ES2114651T3 (en) 1998-06-01
KR100337224B1 (en) 2002-10-25
CN1113170A (en) 1995-12-13

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