EP0692314B1 - Process and device for intensifying the contact between a rolled strip and a fluid - Google Patents
Process and device for intensifying the contact between a rolled strip and a fluid Download PDFInfo
- Publication number
- EP0692314B1 EP0692314B1 EP95108373A EP95108373A EP0692314B1 EP 0692314 B1 EP0692314 B1 EP 0692314B1 EP 95108373 A EP95108373 A EP 95108373A EP 95108373 A EP95108373 A EP 95108373A EP 0692314 B1 EP0692314 B1 EP 0692314B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolled strip
- liquid
- flow
- bath
- slot nozzle
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 10
- 239000012530 fluid Substances 0.000 title 1
- 239000007788 liquid Substances 0.000 claims description 52
- 238000005554 pickling Methods 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000002826 coolant Substances 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 210000000056 organ Anatomy 0.000 description 3
- 230000000284 resting effect Effects 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- 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 method and an apparatus to intensify the contact between a rolled strip and a liquid in a cooling or pickling device, wherein the liquid under pressure from a supply to an outlet member and exiting from this with an energetic flow in a closed beam with one extending across and across the width of the roll relatively narrow flow profile at high speed perpendicular to the rolled strip discharged, then the beam is continuously deflected into a flow parallel to the strip and the flow along a contact path on the rolled strip guided in parallel flow and then from the rolled strip is dissipated.
- the belt cooling is preferably relaxed Water and a suitable for descaling the surface Pickling liquid used.
- FR-A-2.223.096 is a cooling machine known for cooling sheet metal, consisting of two in parallel running flat walls, between which the sheet is guided becomes.
- a cooling water flow in circulation brought below and above the Sheet metal formed chambers.
- the cooling water flow that over Lines arranged perpendicular to the sheet on the sheet abandoned and discharged by gravity or removed from a storage container by means of a pump.
- the belt runs through the pickling agent in the immersion bath. This results in the requirement that partially used Stain exchanged for fresh stain as soon as possible and this is fed over the bandwidth. Because it depends the pickling effect and accordingly the permissible speed of the strip as it passes through the pickling bath. With others The duration of the tape is within the words Pass-through route in direct connection with to be conveyed and fresh stain to be brought into contact with the belt.
- the invention has for its object a method and specify a device with which it is possible to sufficiently large amount of coolant or pickling liquid in intensive contact with a rolled strip for cooling or pickling bring with the liquid with predetermined Flow energy and in an even distribution over the Width and length of a wetting surface of the belt without danger a hooking of the band to be threaded can be fed and a corresponding device a particularly simple and should have robust construction.
- the problem is solved with a method of Preamble of claim 1 type with the invention in that the exit of the closed Liquid jet from the mouthpiece of the as a slot nozzle trained outlet member of the cooling or pickling device below the level of a still liquid bath at such a high speed that by transmission from kinetic energy of the highly accelerated liquid jet to the stationary one Parts of this liquid bath entrained and are conveyed through the contact path.
- a device for performing the method is with a Storage container for the liquid with attached Booster pump designed and with a pressure line and one connected to it, at least one Outlet member for the pressure chamber containing liquid equipped, with the exit organ one over the Width of the band extending slot nozzle, the transverse to Wide, relatively narrow mouthpiece perpendicular to the band is directed against this, to the slot nozzle downstream then a mouthpiece lengthening Flow guide body is arranged, one in the direction which forms a continuously curved flow guide surface downstream after deflection by approximately 90 ° parallel to the belt and in given distance to this below Formation of a contact line extends into one Liquid drain channel opens.
- the cooling or pickling device is so deep immersed in a still liquid bath that the The mouthpiece of the slot nozzle is below the bath level and that forming the contact path parallel to the rolled strip extending part of the flow guide body above the Bath level.
- the invention is based on a pure represented schematic drawing. As the figure shows the belt (1) moves in the direction of the arrow (2) over the Device (40) for supplying liquid.
- the Device (40) occasionally in any number can be arranged one behind the other.
- the device (40) has a storage container (20) for the Liquid with a booster pump arranged on it (21) and a pressure line (22). To the pressure line (22) a pressure chamber (23) closes with an outlet member (24). This is considered to be across the width of the band (1) extending slot nozzle (24) with a transverse to the width relatively narrow mouthpiece (25). The slot nozzle (24) with its mouthpiece (25) is perpendicular to the band (1) directed against this. This will work under all circumstances avoided that a newly threaded band (1) on or in the Can hook nozzle (24). At the slot nozzle (24) or that Mouthpiece (25) downstream is a Flow guide body (27) arranged.
- This has an in Direction of flow flow continuously curved downstream (28), which are parallel after deflection by approximately 90 ° to the belt (1) and at a specified distance from it below Forming a contact path (26) extends. This ends into a liquid drain channel (29).
- the contact route (26) is between the flow guide surface (28) and the belt (1) formed with a predetermined flow cross-section and has a predetermined length.
- a cooler (30) is arranged in the liquid drain channel (29) . It is on the tape (1) the coolant transferred heat and dissipated to this Way ensured that the circuit of the coolant is not is sustainably heated or can be supported by the Liquid in the closed circuit the temperature of the Liquid kept at a certain temperature level become.
- the figure further shows that the device (40) in turn is trained to be at rest Liquid (13) in the form of a liquid bath with the Bath level (12) partially immersed.
- the resting Liquid (13) parts of this entrained and through the Contact path (26) within the flow (11) conveyed through.
- Large quantities of liquid are in Movement set and through the contact path (26) promoted.
- the figure also shows that the design of the device (40) is very simple and robust. It results from the forced flow (11) in the contact path (26) a large Wetting distance with a defined relative speed between the flow (26) and the belt (1). Next is too notice that at low belt speed the Flow direction of the contact section also the direction of tape travel can be rectified.
- the device is (40) for supplying liquid by 180 ° compared to the Display rotated. Because in the contact line (26) no high specific pressure against the tape (1) is built up and also a uniform Pressure distribution over the cooling or pickling cross section given is the method or the trained for this Device also for cooling thinly cast tapes be used.
Description
Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zur Intensivierung des Kontaktes zwischen einem Walzband und einer Flüssigkeit in einer Kühl- oder Beizvorrichtung, wobei die Flüssigkeit unter Druck aus einem Vorrat zu einem Austrittsorgan und aus diesem austretend mit einer energiereichen Strömung in geschlossenem Strahl mit einem sich über die Breite des Walzbandes erstreckenden und quer dazu relativ engen Strömungsprofil unter hoher Geschwindigkeit senkrecht gegen das Walzband ausgetragen, sodann der Strahl in eine zum Bandverlauf parallel gerichtete Strömung stetig umgelenkt und die Strömung über eine Kontaktstrecke am Walzband mit paralleler Strömung entlang geführt und danach vom Walzband abgeführt wird.The invention relates to a method and an apparatus to intensify the contact between a rolled strip and a liquid in a cooling or pickling device, wherein the liquid under pressure from a supply to an outlet member and exiting from this with an energetic flow in a closed beam with one extending across and across the width of the roll relatively narrow flow profile at high speed perpendicular to the rolled strip discharged, then the beam is continuously deflected into a flow parallel to the strip and the flow along a contact path on the rolled strip guided in parallel flow and then from the rolled strip is dissipated.
Bei Bandanlagen von Warm- und Kaltwalzwerken sowie Beizen ist es in vielen Fällen erforderlich, dass das Band von einer oder beiden Seiten mit einem flüssigen Medium in intensiven Kontakt gebracht wird, und zwar:
- bei Warm- und Kaltwalzwerken zur Bandkühlung,
- beim Beizen zur Oberflächenentzunderung.
- in hot and cold rolling mills for strip cooling,
- when pickling for surface descaling.
Entsprechend wird zur Bandkühlung vorzugsweise entspanntes Wasser und zur Oberflächenentzunderung eine geeignete Beizflüssigkeit verwendet.Accordingly, the belt cooling is preferably relaxed Water and a suitable for descaling the surface Pickling liquid used.
Bisher wurden bei Kaltwalzwerken Einzeldüsen oder kurze Schlitzdüsen eingesetzt. Bauartbedingt muss der Düsenaustritt gegen Einhaken des Bandes geschützt sein. Darüber hinaus ist eine Einstellung der Düsen nach Bandbreite erforderlich. Bei Warmwalzwerken werden üblicherweise sogenannte Laminarkühlstrecken verwendet, die aus einer Vielzahl von mit Düsen bestückten Einzelrohren bestehen.So far, single nozzles or short ones have been used in cold rolling mills Slot nozzles used. The nozzle outlet must be designed be protected against hooking the tape. Beyond that adjustment of the nozzles according to bandwidth required. At Hot rolling mills are usually called Laminar cooling lines are used, which consist of a variety of Individual tubes fitted with nozzles.
Aus der FR-A-2.223.096 ist beispielsweise eine Kühlmaschine zum Kühlen von Blechen bekannt, bestehend aus zwei parallel verlaufenden planen Wänden, zwischen denen das Blech geführt wird. Durch die auf diese Weise unterhalb und oberhalb des Bleches gebildeten Kammern wird ein Kühlwasserstrom in Umlauf gebracht. Quer zur Längsrichtung des Bleches sind Führungsrollen angeordnet, um die der Kühlwasserstrom teilweise geführt wird. Der Kühlwasserstrom, der über senkrecht zum Blech angeordnete Leitungen auf das Blech aufgegeben und wieder abgeführt wird, wird durch Schwerkraft oder mittels einer Pumpe aus einem Vorratsbehälter entnommen.FR-A-2.223.096, for example, is a cooling machine known for cooling sheet metal, consisting of two in parallel running flat walls, between which the sheet is guided becomes. By the way below and above the Sheet metal formed chambers is a cooling water flow in circulation brought. Are transverse to the longitudinal direction of the sheet Guide rollers arranged around which the cooling water flow is partially managed. The cooling water flow that over Lines arranged perpendicular to the sheet on the sheet abandoned and discharged by gravity or removed from a storage container by means of a pump.
Beim Beizen durchläuft das Band das Beizmittel im Tauchbad. Hierbei ergibt sich die Forderung, dass teilweise verbrauchte Beize so schnell wie möglich gegen frische Beize ausgetauscht und diese über die Bandbreite zugeführt wird. Denn davon hängt die Beizwirkung und entsprechend die zulässige Geschwindigkeit des Bandes beim Durchlauf durch das Beizbad ab. Mit anderen Worten steht die Verweildauer des Bandes innerhalb der Durchlaufstrecke in direktem Zusammenhang mit nachzufördernder und mit dem Band in Kontakt zu bringender frischer Beize.When pickling, the belt runs through the pickling agent in the immersion bath. This results in the requirement that partially used Stain exchanged for fresh stain as soon as possible and this is fed over the bandwidth. Because it depends the pickling effect and accordingly the permissible speed of the strip as it passes through the pickling bath. With others The duration of the tape is within the words Pass-through route in direct connection with to be conveyed and fresh stain to be brought into contact with the belt.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung anzugeben, mit welchen es gelingt, eine ausreichend große Menge an Kühl- oder Beizflüssigkeit in intensiven Kontakt mit einem Walzband zum Kühlen oder Beizen zu bringen, wobei die Flüssigkeit mit vorgegebener Strömungsenergie sowie in gleichmäßiger Verteilung über die Breite und Länge einer Benetzungsfläche des Bandes ohne Gefahr eines Einhakens des einzufädelnden Bandes zuführbar sein und eine entsprechende Vorrichtung eine besonders einfache und robuste Bauweise aufweisen soll.The invention has for its object a method and specify a device with which it is possible to sufficiently large amount of coolant or pickling liquid in intensive contact with a rolled strip for cooling or pickling bring with the liquid with predetermined Flow energy and in an even distribution over the Width and length of a wetting surface of the belt without danger a hooking of the band to be threaded can be fed and a corresponding device a particularly simple and should have robust construction.
Die Lösung der Aufgabe gelingt bei einem Verfahren der im Oberbegriff von Anspruch 1 genannten Art mit der Erfindung dadurch, dass der Austritt des geschlossenen Flüssigkeitsstrahls aus dem Mundstück des als Schlitzdüse ausgebildeten Austrittsorgans der Kühl- oder Beizvorrichtung unterhalb des Badspiegels eines ruhenden Flüssigkeitsbades mit einer so hohen Geschwindigkeit erfolgt, dass durch Übertragung von kinetischer Energie des hochbeschleunigten Flüssigkeitsstrahls an das ruhende Flüssigkeitsbad Teile dieses Flüssigkeitsbades mitgerissen und durch die Kontaktstrecke hindurch gefördert werden.The problem is solved with a method of Preamble of claim 1 type with the invention in that the exit of the closed Liquid jet from the mouthpiece of the as a slot nozzle trained outlet member of the cooling or pickling device below the level of a still liquid bath at such a high speed that by transmission from kinetic energy of the highly accelerated liquid jet to the stationary one Parts of this liquid bath entrained and are conveyed through the contact path.
Durch diese Maßnahmen werden große Mengen Flüssigkeit in Bewegung gesetzt und durch die Kontaktstrecke hindurch gefördert, da nicht nur die aus dem Austrittsorgan ausgetragene Flüssigkeit, sondern auch noch mitgerissene Flüssigkeitsteile aus dem ruhenden Flüssigkeitsbad durch die Kontaktstrecke geführt werden.Through these measures, large amounts of liquid are in Movement set and through the contact path promoted, since not only those from the exit organ discharged liquid, but also entrained liquid Parts of liquid from the resting liquid bath through the Contact route are performed.
Mit großem Vorteil wird durch die zwangsweise Zuführung der Flüssigkeit eine vorgegebene Menge an Kühl- oder Beizflüssigkeit gleichmäßig über die Breite des Bandes zugeführt, wobei sich über die gesamte Kontaktstrecke im Gleichgewicht zwischen dem dort ausgebildeten Strömungsquerschnitt und der zugeführten Flüssigkeitsmenge zwangsweise eine Strömungsgeschwindigkeit ausbildet, die zu einer Intensivierung des Kontaktes zwischen Walzband und Flüssigkeit führt.The forced feeding of the Liquid a predetermined amount of cooling or Pickling liquid evenly across the width of the belt supplied, with over the entire contact distance in Balance between what is trained there Flow cross section and the amount of liquid supplied inevitably forms a flow rate that too an intensification of the contact between the rolled strip and Liquid leads.
Dabei ergibt sich im Falle der Bandkühlung ein vergleichsweise hoher Wärmeübergang zwischen der strömenden Kühlflüssigkeit und dem Band, und im Falle der Beizung ein intensiver Austausch von verbrauchter Beize gegen frische Beize durch die erzwungene und damit intensive Strömung der Flüssigkeiten mit hoher Relativgeschwindigkeit zum Band.This results in a comparative case in the case of strip cooling high heat transfer between the flowing coolant and the tape, and in the case of pickling an intense one Exchange of used stain for fresh stain by the forced and thus intensive flow of liquids with high relative speed to the belt.
Durch Umlenkung der Austrittsrichtung der druckbeaufschlagten Flüssigkeit um 90° ist es möglich, ein Strömungsprofil über die gesamte Breite des Bandes aufzubauen, ohne dass die Gefahr besteht, dass das Band am Austrittsorgan einhaken könnte.By redirecting the outlet direction of the pressurized Liquid at 90 ° it is possible to have a flow profile build up the entire width of the tape without the risk there is that the band could hook on the exit organ.
Der in geschlossenem Kreislauf nach ihrem Austritt aus der Kontaktstrecke wieder in den Vorrat zurückgeförderten Flüssigkeit wird im Falle einer Walzbandkühlung die vom Walzband übertragene Wärme durch Zwischenkühlung entzogen.The in a closed circuit after leaving the Contact route promoted back into the stock In the case of cooling of the strip, liquid becomes the from The heat transferred from the rolled strip is removed by intercooling.
Eine Vorrichtung zur Durchführung des Verfahrens ist mit einem Vorratsbehälter für die Flüssigkeit mit daran angeordneter Druckerhöhungspumpe ausgebildet sowie mit einer Druckleitung und einer an diese angeschlossenen, wenigstens ein Austrittsorgan für die Flüssigkeit aufweisenden Druckkammer ausgestattet, wobei das Austrittsorgan eine sich über die Breite des Bandes erstreckende Schlitzdüse ist, deren quer zur Breite relativ enges Mundstück im Abstand vom Band lotrecht gegen dieses gerichtet ist, wobei an die Schlitzdüse stromabwärts anschließend ein deren Mundstück verlängernder Strömungsleitkörper angeordnet ist, der eine in Richtung stromabwärts stetig gekrümmte Strömungsleitfläche bildet, die sich nach Umlenkung um annähernd 90° parallel zum Band und im vorgegebenen Abstand zu diesem unter Ausbildung einer Kontaktstrecke erstreckt und in einen Flüssigkeitsablaufkanal einmündet.A device for performing the method is with a Storage container for the liquid with attached Booster pump designed and with a pressure line and one connected to it, at least one Outlet member for the pressure chamber containing liquid equipped, with the exit organ one over the Width of the band extending slot nozzle, the transverse to Wide, relatively narrow mouthpiece perpendicular to the band is directed against this, to the slot nozzle downstream then a mouthpiece lengthening Flow guide body is arranged, one in the direction which forms a continuously curved flow guide surface downstream after deflection by approximately 90 ° parallel to the belt and in given distance to this below Formation of a contact line extends into one Liquid drain channel opens.
Mit großem Vorteil ergibt sich durch Ausbildung des Strömungsleitkörpers ein definierter Strömungsweg entlang einer Kontaktstrecke von vorgegebener Breite und Länge je nach Anordnung unterhalb oder oberhalb oder zu beiden Seiten des Bandes, wobei im Bereich dieser Kontaktstrecke eine intensive Benetzung bzw. Bespülung der Bandoberfläche mit Kühl- oder Beizflüssigkeit zwangsläufig gegeben ist.With great advantage results from training the Flow guide body along a defined flow path a contact distance of predetermined width and length depending on Arrangement below or above or on both sides of the Band, with an intensive in the area of this contact route Wetting or flushing the belt surface with cooling or Pickling liquid is inevitable.
Gemäß der Erfindung ist die Kühl- oder Beizvorrichtung so tief in ein ruhendes Flüssigkeitsbad eingetaucht, dass das Mundstück der Schlitzdüse sich unterhalb des Badspiegels und der die Kontaktstrecke bildende parallel zum Walzband sich erstreckenden Teil des Strömungsleitkörpers sich oberhalb des Badspiegels befindet.According to the invention, the cooling or pickling device is so deep immersed in a still liquid bath that the The mouthpiece of the slot nozzle is below the bath level and that forming the contact path parallel to the rolled strip extending part of the flow guide body above the Bath level.
Die Erfindung wird im folgenden anhand einer rein schematischen Zeichnung dargestellt. Wie die Figur zeigt, bewegt sich das Band (1) in Richtung des Pfeiles (2) über die Vorrichtung (40) zur Zuführung von Flüssigkeit hinweg. Dabei sei bemerkt, dass derartige Vorrichtungen (40) fallweise in beliebiger Anzahl hintereinander angeordnet sein können.The invention is based on a pure represented schematic drawing. As the figure shows the belt (1) moves in the direction of the arrow (2) over the Device (40) for supplying liquid. Here it should be noted that such devices (40) occasionally in any number can be arranged one behind the other.
Die Vorrichtung (40) weist einen Vorratsbehälter (20) für die Flüssigkeit mit einer daran angeordneten Druckerhöhungspumpe (21) und einer Druckleitung (22) auf. An die Druckleitung (22) schließt sich eine Druckkammer (23) mit einem Austrittsorgan (24) an. Dieses ist als eine sich über die Breite des Bandes (1) erstreckende Schlitzdüse (24) mit einem quer zur Breite relativ engen Mundstück (25) ausgebildet. Die Schlitzdüse (24) mit ihrem Mundstück (25) ist im Abstand vom Band (1) lotrecht gegen dieses gerichtet. Dadurch wird unter allen Umständen vermieden, dass ein neu eingefädeltes Band (1) an oder in die Düse (24) einhaken könnte. An die Schlitzdüse (24) bzw. das Mundstück (25) stromabwärts anschließend ist ein Strömungsleitkörper (27) angeordnet. Dieser weist eine in Richtung stromabwärts stetig gekrümmte Strömungsleitfläche (28) auf, die sich nach Umlenkung um annähernd 90° parallel zum Band (1) und im vorgegebenen Abstand zu diesem unter Ausbildung einer Kontaktstrecke (26) erstreckt. Diese mündet in einen Flüssigkeitsablaufkanal (29) ein. Die Kontaktstrecke (26) ist zwischen der Strömungsleitfläche (28) und dem Band (1) mit einem vorgegebenen Strömungsquerschnitt ausgebildet und weist eine vorgegebene Länge auf.The device (40) has a storage container (20) for the Liquid with a booster pump arranged on it (21) and a pressure line (22). To the pressure line (22) a pressure chamber (23) closes with an outlet member (24). This is considered to be across the width of the band (1) extending slot nozzle (24) with a transverse to the width relatively narrow mouthpiece (25). The slot nozzle (24) with its mouthpiece (25) is perpendicular to the band (1) directed against this. This will work under all circumstances avoided that a newly threaded band (1) on or in the Could hook nozzle (24). At the slot nozzle (24) or that Mouthpiece (25) downstream is a Flow guide body (27) arranged. This has an in Direction of flow flow continuously curved downstream (28), which are parallel after deflection by approximately 90 ° to the belt (1) and at a specified distance from it below Forming a contact path (26) extends. This ends into a liquid drain channel (29). The contact route (26) is between the flow guide surface (28) and the belt (1) formed with a predetermined flow cross-section and has a predetermined length.
Wie die Figur weiterhin zeigt, ist im Flüssigkeitsablaufkanal (29) ein Kühler (30) angeordnet. Darin wird vom Band (1) auf die Kühlflüssigkeit übertragene Wärme abgeführt und auf diese Weise dafür gesorgt, dass der Kreislauf des Kühlmittels nicht nachhaltig aufgeheizt wird bzw. kann bei Förderung der Flüssigkeit im geschlossenen Kreislauf die Temperatur der Flüssigkeit auf einem bestimmten Temperaturniveau gehalten werden.As the figure also shows, is in the liquid drain channel (29) a cooler (30) is arranged. It is on the tape (1) the coolant transferred heat and dissipated to this Way ensured that the circuit of the coolant is not is sustainably heated or can be supported by the Liquid in the closed circuit the temperature of the Liquid kept at a certain temperature level become.
Die Figur zeigt weiterhin, dass die Vorrichtung (40) ihrerseits so ausgebildet ist, dass sie in eine ruhende Flüssigkeit (13) in Form eines Flüssigkeitsbades mit dem Badspiegel (12) teilweise eintaucht. In diesem Falle liegt der Austritt des geschlossenen Flüssigkeitsstrahles (10) aus dem Mundstück (25) der Schlitzdüse (24) austretend unterhalb des Badspiegels (12) der ruhenden Flüssigkeit (13). Dabei werden durch Übertragung von kinetischer Energie des hoch beschleunigten Flüssigkeitsstrahles (10) an die ruhende Flüssigkeit (13) Teile dieser mitgerissen und durch die Kontaktstrecke (26) innerhalb der Strömung (11) hindurchgefördert. Dabei werden große Mengen Flüssigkeit in Bewegung gesetzt und durch die Kontaktstrecke (26) hindurch gefördert.The figure further shows that the device (40) in turn is trained to be at rest Liquid (13) in the form of a liquid bath with the Bath level (12) partially immersed. In this case the Exit of the closed liquid jet (10) from the Mouthpiece (25) of the slot nozzle (24) emerging below the Bath level (12) of the resting liquid (13). In doing so by transferring kinetic energy to the high accelerated liquid jet (10) to the resting Liquid (13) parts of this entrained and through the Contact path (26) within the flow (11) conveyed through. Large quantities of liquid are in Movement set and through the contact path (26) promoted.
Die Figur zeigt ferner, dass die Bauart der Vorrichtung (40) sehr einfach und robust ist. Dabei ergibt sie durch die erzwungene Strömung (11) in der Kontaktstrecke (26) eine große Benetzungsstrecke mit definierter Relativgeschwindigkeit zwischen der Strömung (26) und dem Band (1). Weiter ist zu bemerken, dass bei geringer Bandgeschwindigkeit die Strömungsrichtung der Kontaktstrecke auch der Bandlaufrichtung gleichgerichtet sein kann. In diesem Falle ist die Vorrichtung (40) zur Zuführung von Flüssigkeit um 180° gegenüber der Darstellung gedreht angeordnet. Weil in der Kontaktstrecke (26) kein hoher spezifischer Druck gegen das Band (1) aufgebaut wird und darüberhinaus eine gleichmäßige Druckverteilung über den Kühl- bzw. Beizquerschnitt gegeben ist, kann das Verfahren bzw. die hierfür ausgebildete Vorrichtung auch zum Kühlen von dünn gegossenen Bändern eingesetzt werden.The figure also shows that the design of the device (40) is very simple and robust. It results from the forced flow (11) in the contact path (26) a large Wetting distance with a defined relative speed between the flow (26) and the belt (1). Next is too notice that at low belt speed the Flow direction of the contact section also the direction of tape travel can be rectified. In this case the device is (40) for supplying liquid by 180 ° compared to the Display rotated. Because in the contact line (26) no high specific pressure against the tape (1) is built up and also a uniform Pressure distribution over the cooling or pickling cross section given is the method or the trained for this Device also for cooling thinly cast tapes be used.
Claims (5)
- Method for the intensification of contact between a rolled strip (1) and a liquid in a cooling or pickling device (40), wherein the liquid is discharged under pressure from a reservoir (20) to an outlet element and, issuing from this with a high-energy flow, at high speed perpendicularly against the rolled strip (1) in a closed jet with a relatively narrow flow profile extending over the width of the rolled strip (1) and transversely thereto, so that the jet is constantly deflected into a flow directed parallelly to the strip advance and the flow is guided along over a contact path (26) at the rolled strip (1) with parallel flow (11) and thereafter led off from the rolled strip (1) back to the reservoir (20), characterised in that the issue of the closed liquid jet (10) from the mouthpiece (25) of the outlet element, which is formed as a slot nozzle (24), of the cooling or pickling device (40) takes place below the bath surface (12) of a quiescent liquid bath (13) at a speed of such a height that, through transmission of kinetic energy of the highly accelerated liquid jet (10) to the quiescent liquid bath (13), portions of this liquid bath (13) are entrained and conveyed through the contact path (26).
- Method according to claim 1, characterised in that the liquid jet (10) discharged from the slot nozzle (24) initially perpendicularly against the rolled strip (1) is constantly deflected through about 90° parallel to the rolled strip (1) by way of a flow guide body (27), the flow guide surface (28) of which prolongs the mouthpiece (25) of the slot nozzle (24) in downstream direction (in arrow direction (11)).
- Method according to claim 1 or 2, characterised in that in the case of a slower speed of the rolled strip, the flow direction (11) of the liquid in the contact path (26) corresponds to the conveying direction of the rolled strip (in arrow direction (2)).
- Device withcharacterised in that for performance of the method according to claim 1, 2 or 3 the cooling or pickling device (40) is immersed so deeply in a quiescent liquid bath (13), that the mouthpiece (25) of the slot nozzle (24) is disposed under the surface of the bath (12) and the part of the flow guide body (27), which forms the contact path (26) and extends parallel to the rolled strip (1), is disposed above the bath surface (12).(a) a pressure chamber (23), which is connected with a pressure increasing pump (21) by way of a pressure duct (22) and the outlet element of which is constructed in the form of a slot nozzle (24) extending over the entire width of the rolled strip (1) and(b) with a flow guide body (27), which prolongs the mouthpiece (25) of the slot nozzle (24) in downstream direction and which forms a flow guide surface (28), which is constantly curved in downstream direction and extends, after deflection through approximately 90°, parallel to the rolled strip (1) while forming a contact path (26) and which opens into a liquid discharge channel (29),
- Device according to claim 4, characterised in that the device (40) together with the flow guide surface (28) is arranged to be oriented the same as or opposite to the strip running direction (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4421082 | 1994-06-16 | ||
| DE4421082A DE4421082A1 (en) | 1994-06-16 | 1994-06-16 | Method and device for intensifying the contact between a rolled strip with a liquid |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0692314A2 EP0692314A2 (en) | 1996-01-17 |
| EP0692314A3 EP0692314A3 (en) | 1996-12-11 |
| EP0692314B1 true EP0692314B1 (en) | 2000-03-15 |
Family
ID=6520761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95108373A Expired - Lifetime EP0692314B1 (en) | 1994-06-16 | 1995-06-01 | Process and device for intensifying the contact between a rolled strip and a fluid |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0692314B1 (en) |
| JP (1) | JPH0857524A (en) |
| DE (2) | DE4421082A1 (en) |
| ES (1) | ES2144541T3 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19702639C1 (en) * | 1997-01-25 | 1998-06-18 | Sundwiger Eisen Maschinen | Continuous chemical descaling of metal strip |
| DE10161985C1 (en) * | 2001-12-17 | 2003-07-03 | Airmatic Ges Umwelt & Tech Mbh | Cleaner for conveyed metal strip prior to coating has feed rollers for strip though housing with low pressure ventilator and spray nozzles |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2223096B1 (en) * | 1973-03-26 | 1976-09-10 | Usinor | |
| FR2261816B1 (en) * | 1974-02-21 | 1976-12-03 | Pechiney Aluminium | |
| JPH0680531B2 (en) * | 1984-12-11 | 1994-10-12 | 富士写真フイルム株式会社 | Magnetic recording medium coating method |
| JP2684485B2 (en) * | 1992-02-13 | 1997-12-03 | 富士写真フイルム株式会社 | Coating device |
-
1994
- 1994-06-16 DE DE4421082A patent/DE4421082A1/en not_active Withdrawn
-
1995
- 1995-06-01 DE DE59507983T patent/DE59507983D1/en not_active Expired - Fee Related
- 1995-06-01 ES ES95108373T patent/ES2144541T3/en not_active Expired - Lifetime
- 1995-06-01 EP EP95108373A patent/EP0692314B1/en not_active Expired - Lifetime
- 1995-06-14 JP JP7147702A patent/JPH0857524A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0857524A (en) | 1996-03-05 |
| EP0692314A3 (en) | 1996-12-11 |
| DE4421082A1 (en) | 1995-12-21 |
| DE59507983D1 (en) | 2000-04-20 |
| ES2144541T3 (en) | 2000-06-16 |
| EP0692314A2 (en) | 1996-01-17 |
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