EP2303481A1 - Device for cleaning a roll of a rolling mill - Google Patents

Device for cleaning a roll of a rolling mill

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Publication number
EP2303481A1
EP2303481A1 EP08874784A EP08874784A EP2303481A1 EP 2303481 A1 EP2303481 A1 EP 2303481A1 EP 08874784 A EP08874784 A EP 08874784A EP 08874784 A EP08874784 A EP 08874784A EP 2303481 A1 EP2303481 A1 EP 2303481A1
Authority
EP
European Patent Office
Prior art keywords
nozzles
cylinder
cleaning
roll
jack
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
EP08874784A
Other languages
German (de)
French (fr)
Other versions
EP2303481B1 (en
Inventor
Pierre Anglade
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Clecim SAS
Original Assignee
Siemens VAI Metals Technologies SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens VAI Metals Technologies SAS filed Critical Siemens VAI Metals Technologies SAS
Publication of EP2303481A1 publication Critical patent/EP2303481A1/en
Application granted granted Critical
Publication of EP2303481B1 publication Critical patent/EP2303481B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B28/00—Maintaining rolls or rolling equipment in effective condition
    • B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/024—Cleaning by means of spray elements moving over the surface to be cleaned

Definitions

  • the invention relates to high-pressure jet cleaning of a cylinder, for example a support cylinder or a working roll of a rolling mill, in particular a skin-pass mill.
  • the skin pass of a steel strip is a cold rolling operation under tension carried out with a moderate elongation.
  • a rolling mill capable of operating the skin-pass operations is incorporated in many steel strip processing lines where it is used essentially for the following purposes:
  • a surface of the rolls of the skin-pass mills may be polluted by adhesions that adversely affect the quality of the surface of the strip.
  • This is, for example, the case of rolling mills installed online in continuous galvanizing plants.
  • Zinc particles stick to the working cylinder. With each rotation of the cylinder, these particles print on a coating of the strip and can alter its surface quality.
  • Another example is in certain applications, where it is necessary to lubricate a working cylinder gap with an emulsion of water and lubricant. In this case, a greasy deposit is generally formed on the cylinder in areas that are not in contact with the bandaged. When changing the width of the strip, this deposit can be detrimental to a roughness transfer on the edges of the strip.
  • One solution employs cylinder cleaning devices by pressurized spraying of detergent fluids. These operations were first manual and then mechanized as described in JP 9 222 907. However, these devices, using low pressure spray and wide jet nozzles, are effective in degreasing coatings of a lubrication product, because of a detergent effect of a sprayed liquid, but they are not able to eliminate adhesions including zinc particles.
  • This method is limited by a low speed of displacement imposed by characteristics of the high pressure nozzles. Given a relatively small dimension of a jet impact, it is necessary to have a slow travel speed in order to guarantee a good recovery of the jet. the impact. For cylinders with a diameter of about 500 millimeters, a table length of about 2 meters and a peripheral band speed of about 120 m / min at 650 m / min, the travel time of a nozzle along the cylinder is about 1 minute 30 seconds. At the base of a constant spraying in and out, one end of the cylinder opposite the half-turn of the nozzle is cleaned every 3 minutes and one end of the U-turn is cleaned almost immediately, which constitutes a waste cleaning liquid and unnecessarily increases waste.
  • the object of the present invention is to solve problems of stability of the cleaning devices and problems of cleaning accuracy with respect to a surface to be cleaned of the cylinder, the problems being introduced by long strokes of the displacement members which cause a change.
  • the entire device has an important point of gravity and equally important forces that operate at the ends of the device, thus producing high material wear.
  • Another object of the present invention is to reduce a cleaning time of the cylinder at each round-trip in a fixed period adjustable between 30 seconds and 1 minute. As the spray is limited to one-way or return-only, the waste of cleaning liquid is removed.
  • the invention thus proposes a device for cleaning a cylinder of a steel strip processing plant, adapted for a displacement parallel to an axis of said cylinder, comprising: at least an even number of nozzles N> 0 for spraying parallel, said nozzles being perpendicular to the axis of the cylinder, a first number N / 2 of the nozzles being attached to a first arm of a support and a second number N / 2 of the nozzles being attached to a second arm of the support, said support being coupled to a displacement member, for example a jack, the jack having a stroke at least equal to 1 / N of a length of the cylinder.
  • one of the cylinder zones swept by at least one nozzle is no longer cleaned in a time varying for example from 0 to 3 minutes each round-trip, but in a fixed period adjustable between 30 seconds and 1 minute following the number N of nozzles chosen.
  • the cleaning frequency is therefore able to be increased in favor of a better quality cleaning because it is more intensive.
  • Figure Example of a four-nozzle cleaning device.
  • the figure is divided into two parts 1a and 1b.
  • the two parts show a rolling mill cylinder (1) supported by bearings (2).
  • a cleaning device (3) is able to move towards the cylinder (1) parallel to an axis (5) of the cylinder (1) under the action of a jack (4).
  • the cleaning device (3) comprises two supports (31) and (32) each providing a cleaning liquid supply of four its (311, 312) and (321, 322) disposed in a first and a second pair of nozzles on each of the two supports (31, 32).
  • the first two nozzles (311, 312) are active and clean respectively a first zone (1-311) and a second zone (1- 312) of the cylinder, the two said zones being juxtaposed.
  • the second pair of nozzles (321, 322) is then inactive.
  • the second pair of the nozzles (321, 322) becomes active and cleans respectively a third zone (1-321) and a fourth zone (1-322). of the cylinder, the two said zones being juxtaposed and offset with respect to the preceding zones.
  • the first pair of nozzles (311, 312) is then inactive.
  • a stroke (41) of the cylinder (4) is at least equal to a quarter of a length (11) of the cylinder.
  • a major advantage of the invention is the fact that a displacement stroke of the nozzles is reduced to 1 / N of the length of the active surface of the cylinders, which makes it possible to reduce in the same proportion a stroke. of the cylinder (4). This improves the stability of the cleaning device (3) by minimizing a displacement of the center of gravity of the device, the displacement occurring with each stroke of the cylinder (4), as well as increasing the cleaning accuracy.
  • the number of nozzles N is equal to four.
  • the advantage in the metallurgical framework is to simplify the device (for example, to avoid an excessive number of nozzles) and likewise to considerably reduce a duration for a complete return of the nozzles (311, 312, 321, 322).
  • the N nozzles (311, 312, 321, 322) are capable of spraying a liquid at high pressure on a surface. face of the cylinder (1). Using high pressure nozzles improves cleaning with a reduced amount of cleaning fluid.
  • a high-pressure jet makes it possible to take advantage of a mechanical detachment of the particles present on the surface of the cylinder, apart from chemical detachment caused by a detergent, which makes it possible to reduce a percentage detergent present in the cleaning liquid.
  • the N nozzles (311, 312, 321, 322) are arranged at an equal mutual distance, said distance being equal to a portion 1 / N (inversely proportional to the number of nozzles N) of the length of the cylinder (1).
  • the distance between the nozzles is equal, making it possible to define for each of the N nozzles an exact cleaning part of the surface of the cylinder, avoiding cleaning areas superimposed, therefore superfluous.
  • the device comprises means for adjusting a distance between the N nozzles and the cylinder.
  • this variant makes it possible to adjust a width of the jet sprayed by the nozzles, in other words to adjust a contact surface of the jet with the cylinder. For example, in cases where spot cleaning is required, the distance will be decreased.
  • the cylinder (4) is arranged so that its stroke (minimized due to the number of nozzles distributed in a manner on the supports / arms adjoining the cylinder) is parallel to the axis of the cylinder (1). Because the invention provides that the stroke is minimized because of the number of nozzles distributed in the arms / supports adjoining the jack, the parallelism of the same stroke is all the easier to ensure, without resorting to a positioning system-cylinder heavy, bulky, complex and expensive.
  • the device comprises a control means adapted to activate a first part of the N nozzles (311, 312, 321, 322) and simultaneously to deactivate a second part of the remaining N nozzles during a first movement of the N nozzles caused by an output of the cylinder (4), said control means being also adapted to deactivate the first part and to activate the second part during a second movement of the N nozzles (311, 312, 321, 322) caused by a retraction of the jack (4).
  • the advantage produced is that a waste of cleaning liquid is reduced and that the round trip time of the nozzles is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

The present invention describes a device for cleaning a roll (1) of a steel strip conversion plant, which device is designed to move parallel to an axis (5) of said roll (1), comprising: at least an even number N (> 0) of parallel spray nozzles, said nozzles being perpendicular to the axis (5) of the roll, a first number N/2 of the nozzles (311, 312) being fixed to a first arm (31) of a supporting member (3) and a second number N/2 of nozzles (321, 322) being fixed to a second arm (32) of the supporting member (3), said supporting member (3) being coupled to an actuator (4), the actuator (4) having a travel of at least 1/N of the length of the roll (1).

Description

Description Description
Dispositif de nettoyage d/ un cylindre d' un laminoirCleaning device for a roll of a rolling mill
L'invention se rapporte au nettoyage par jet à haute pression d'un cylindre, par exemple d'un cylindre d'appui ou d'un cylindre de travail d'un laminoir, en particulier d'un laminoir skin-pass .The invention relates to high-pressure jet cleaning of a cylinder, for example a support cylinder or a working roll of a rolling mill, in particular a skin-pass mill.
Le skin-pass d'une bande d'acier est une opération de laminage à froid sous traction réalisée avec un allongement modéré. Un laminoir apte à opérer les opérations de skin-pass est incorporé dans de nombreuses lignes de transformation de bandes d'acier où il est utilisé essentiellement aux fins sui- vantes:The skin pass of a steel strip is a cold rolling operation under tension carried out with a moderate elongation. A rolling mill capable of operating the skin-pass operations is incorporated in many steel strip processing lines where it is used essentially for the following purposes:
Effacer un palier élastique d' acier et permettre ainsi une meilleure qualité des emboutis qui seront ultérieurement réalisés dans les bandes, Améliorer une planéité de la bande, - Imprimer un état de surface particulier à la bande, en vue d'améliorer une tribologie d'emboutissage.Erase a steel elastic bearing and thus allow a better quality of the stampings which will be realized later in the bands, To improve a flatness of the band, - To print a state of surface particular to the band, in order to improve a tribology of stamping.
Dans certaines de leurs utilisations, une surface des cylindres des laminoirs skin-pass peut se trouver polluée par des adhérences qui nuisent à une qualité de surface de la bande. C'est, par exemple, le cas des laminoirs installés en ligne dans des installations de galvanisation en continu. De particules de zinc se collent sur le cylindre de travail. A chaque rotation du cylindre, ces particules s'impriment sur un revê- tement de la bande et peuvent altérer sa qualité de surface. Un autre exemple se trouve dans certaines applications, ou il est nécessaire d'assurer une lubrification d'un entrefer du cylindre de travail avec une émulsion d'eau et de lubrifiant. Dans ce cas, il se forme généralement un dépôt gras sur le cylindre dans des zones qui ne sont pas en contact avec la bande. Lors d'un changement de largeur de la bande, ce dépôt peut se révéler néfaste sur un transfert de rugosité sur les bords de la bande.In some of their uses, a surface of the rolls of the skin-pass mills may be polluted by adhesions that adversely affect the quality of the surface of the strip. This is, for example, the case of rolling mills installed online in continuous galvanizing plants. Zinc particles stick to the working cylinder. With each rotation of the cylinder, these particles print on a coating of the strip and can alter its surface quality. Another example is in certain applications, where it is necessary to lubricate a working cylinder gap with an emulsion of water and lubricant. In this case, a greasy deposit is generally formed on the cylinder in areas that are not in contact with the bandaged. When changing the width of the strip, this deposit can be detrimental to a roughness transfer on the edges of the strip.
Pour résoudre ces problèmes, quelques solutions ont été proposées. Une solution emploie des dispositifs de nettoyage des cylindres par pulvérisation sous pression de fluides détergents. Ces opérations ont d'abord été manuelles puis mécanisées comme décrit dans JP 9 222 907. Toutefois, ces disposi- tifs, faisant appel à des buses de pulvérisation à basse pression et au jet large, se montrent efficaces pour dégraisser des enductions d'un produit de lubrification, à cause d'un effet détergent d'un liquide pulvérisé, mais ils ne sont pas aptes à éliminer des adhérences notamment de particules de zinc.To solve these problems, some solutions have been proposed. One solution employs cylinder cleaning devices by pressurized spraying of detergent fluids. These operations were first manual and then mechanized as described in JP 9 222 907. However, these devices, using low pressure spray and wide jet nozzles, are effective in degreasing coatings of a lubrication product, because of a detergent effect of a sprayed liquid, but they are not able to eliminate adhesions including zinc particles.
Une autre solution, décrite dans EP 0 995 504, utilise des buses de pulvérisation à jet étroit et à haute énergie, qui introduit deux difficultés: la nécessité d'ajuster avec précision une distance entre la buse et le cylindre à nettoyer, donc de s'adapter aux diamètres des différents cylindres utilisés,Another solution, described in EP 0 995 504, uses narrow-jet spray nozzles and high energy, which introduces two difficulties: the need to precisely adjust a distance between the nozzle and the cylinder to clean, so s to adapt to the diameters of the different cylinders used,
- la nécessité d'avoir un recouvrement de l'impact des jets tout au long du cylindre, conduisant à une mul- tiplication déraisonnable des buses de pulvérisation. Cette disposition impose une parfaite adaptation de la vitesse de déplacement de la lance à une vitesse de rotation du cylindre en fonction d'une largeur d'impact du jet. Le brevet décrit une possibilité d'ajustement d'une distance buse/cylindre et d'une vitesse de déplacement de la buse.the necessity of having an overlap of the impact of the jets all along the cylinder, leading to an unreasonable multiplication of the spray nozzles. This arrangement imposes a perfect adaptation of the speed of movement of the lance at a rotational speed of the cylinder according to a jet impact width. The patent discloses a possibility of adjusting a nozzle / cylinder distance and a speed of movement of the nozzle.
Cette méthode est limitée par une faible vitesse de déplacement imposée par des caractéristiques des buses à haute pression. Compte tenu d'une relativement faible dimension d'un impact du jet, il est nécessaire d'avoir une vitesse de dé- placement lente, afin de garantir un bon recouvrement de l'impact. Pour des cylindres de diamètre voisin de 500 millimètres, de longueur de table voisine de 2 mètres et pour une vitesse périphérique de bande voisine de 120m/min à 650m/min, le temps de parcours d'une buse le long du cylindre est d'environ 1 minute 30 secondes. A la base d'une pulvérisation constante à l'aller et au retour, une extrémité du cylindre opposée au demi-tour de la buse est nettoyée toutes les 3 minutes et une extrémité du demi-tour est nettoyée quasi immédiatement, ce qui constitue un gaspillage de liquide de net- toyage et augmente inutilement des rejets.This method is limited by a low speed of displacement imposed by characteristics of the high pressure nozzles. Given a relatively small dimension of a jet impact, it is necessary to have a slow travel speed in order to guarantee a good recovery of the jet. the impact. For cylinders with a diameter of about 500 millimeters, a table length of about 2 meters and a peripheral band speed of about 120 m / min at 650 m / min, the travel time of a nozzle along the cylinder is about 1 minute 30 seconds. At the base of a constant spraying in and out, one end of the cylinder opposite the half-turn of the nozzle is cleaned every 3 minutes and one end of the U-turn is cleaned almost immediately, which constitutes a waste cleaning liquid and unnecessarily increases waste.
Le but de la présente invention est de résoudre des problèmes de stabilité des dispositifs de nettoyage et des problèmes de précision du nettoyage par rapport à une surface à nettoyer du cylindre, les problèmes étant introduits par des longues courses des organes de déplacement qui provoquent un changement important de point de gravité du dispositif entier et des forces également importantes qui actionnent à des extrémités du dispositif, en conséquence produisant des usures élevées de matériel. un autre but de la présente invention est de réduire une durée de nettoyage du cylindre à chaque aller-retour selon une période fixe ajustable entre 30 secondes et 1 minute. La pulvérisation étant limitée au seul aller ou au seul retour, les gaspillages de liquide de nettoyage sont supprimés.The object of the present invention is to solve problems of stability of the cleaning devices and problems of cleaning accuracy with respect to a surface to be cleaned of the cylinder, the problems being introduced by long strokes of the displacement members which cause a change. The entire device has an important point of gravity and equally important forces that operate at the ends of the device, thus producing high material wear. Another object of the present invention is to reduce a cleaning time of the cylinder at each round-trip in a fixed period adjustable between 30 seconds and 1 minute. As the spray is limited to one-way or return-only, the waste of cleaning liquid is removed.
L'invention propose ainsi un dispositif de nettoyage d'un cylindre d'une installation de transformation de bande d'acier, adapté pour un déplacement parallèle à un axe dudit cylindre, comprenant : au moins un nombre pair de buses N > 0 à pulvérisation parallèle, lesdites buses étant perpendiculaires à l'axe du cylindre, un premier nombre N/2 des buses étant fixées à un premier bras d'un support et un seconde nombre N/2 des buses étant fixées à un deuxième bras du support, ledit support étant couplé à un organe de déplacement, par exemple un vérin, le vérin ayant une course au moins égale à 1/N d'une longueur du cylindre.The invention thus proposes a device for cleaning a cylinder of a steel strip processing plant, adapted for a displacement parallel to an axis of said cylinder, comprising: at least an even number of nozzles N> 0 for spraying parallel, said nozzles being perpendicular to the axis of the cylinder, a first number N / 2 of the nozzles being attached to a first arm of a support and a second number N / 2 of the nozzles being attached to a second arm of the support, said support being coupled to a displacement member, for example a jack, the jack having a stroke at least equal to 1 / N of a length of the cylinder.
Ces aspects sont en particulier retranscris au travers de la revendication 1.These aspects are in particular retranscribed through claim 1.
La course du vérin étant considérablement réductible (en comparaison de systèmes comportant une buse), il s'en suit que des déploiements du/des bras de portance des buses se font avec une stabilité mécanique avantageusement accrue permettant par exemple aux buses de rester à une distance très constante du cylindre, quelque soit leur déploiement.Since the stroke of the jack is considerably reducible (in comparison with systems comprising a nozzle), it follows that deployments of the nozzle lift arm (s) are done with a mechanical stability that is advantageously increased, which makes it possible, for example, for the nozzles to remain at a constant speed. very constant distance from the cylinder, whatever their deployment.
Dans ces conditions, une des zones de cylindre balayée par au moins une buse n'est plus nettoyée sous une durée variant par exemple de 0 à 3 minutes à chaque aller-retour, mais selon une période fixe ajustable entre 30 secondes et 1 minute suivant le nombre N de buses choisi. La fréquence de nettoyage est donc apte À être augmentée au profit d'un nettoyage de meilleure qualité, car plus intensif.Under these conditions, one of the cylinder zones swept by at least one nozzle is no longer cleaned in a time varying for example from 0 to 3 minutes each round-trip, but in a fixed period adjustable between 30 seconds and 1 minute following the number N of nozzles chosen. The cleaning frequency is therefore able to be increased in favor of a better quality cleaning because it is more intensive.
L'objet de l'invention et ses avantages seront mieux interprétés à l'aide de sous-revendications et d'exemples donnés par la figure suivante:The subject of the invention and its advantages will be better understood by means of subclaims and examples given by the following figure:
Figure : Exemple d'un dispositif de nettoyage à quatre buses.Figure: Example of a four-nozzle cleaning device.
La figure est divisée en deux parties la et Ib. Les deux par- ties montrent un cylindre de laminoir (1) supporté par des paliers (2) . un dispositif de nettoyage (3) est apte à se déplacer face au cylindre (1) parallèlement à un axe (5) du cylindre (1) sous l'action d'un vérin (4). Le dispositif de nettoyage (3) comporte deux supports (31) et (32) assurant chacun une alimentation en liquide de nettoyage de quatre bu- ses (311, 312) et (321, 322) disposées en une première et en une deuxième paire de buses sur chacun des deux supports (31, 32) .The figure is divided into two parts 1a and 1b. The two parts show a rolling mill cylinder (1) supported by bearings (2). a cleaning device (3) is able to move towards the cylinder (1) parallel to an axis (5) of the cylinder (1) under the action of a jack (4). The cleaning device (3) comprises two supports (31) and (32) each providing a cleaning liquid supply of four its (311, 312) and (321, 322) disposed in a first and a second pair of nozzles on each of the two supports (31, 32).
Pendant une phase de sortie du vérin (4) représentée en par- tie la de la figure, les deux premières buses (311, 312) sont actives et nettoient respectivement une première zone ,(1-311) et une deuxième zone (1-312) du cylindre, les deux dites zones étant juxtaposées. La deuxième paire des buses (321, 322) est alors inactive. Pendant la phase de rentrée du vérin (4) représentée en partie Ib de la figure, la deuxième paire des buses (321, 322) devient active et nettoie respectivement une troisième zone (1-321) et une quatrième zone (1-322) du cylindre, les deux dites zones étant juxtaposées et décalées par rapport aux zo- nés précédentes. La première paire des buses (311, 312) est alors inactive.During an output phase of the cylinder (4) shown in part la of the figure, the first two nozzles (311, 312) are active and clean respectively a first zone (1-311) and a second zone (1- 312) of the cylinder, the two said zones being juxtaposed. The second pair of nozzles (321, 322) is then inactive. During the retraction phase of the jack (4) shown in part Ib of the figure, the second pair of the nozzles (321, 322) becomes active and cleans respectively a third zone (1-321) and a fourth zone (1-322). of the cylinder, the two said zones being juxtaposed and offset with respect to the preceding zones. The first pair of nozzles (311, 312) is then inactive.
Une course (41) du vérin (4) est au moins égale au quart d'une longueur (11) du cylindre.A stroke (41) of the cylinder (4) is at least equal to a quarter of a length (11) of the cylinder.
Comme déjà abordé auparavant, un avantage majeur de l'invention est le fait qu'une course de déplacement des buses est réduite à 1/N de la longueur de la surface active des cylindres, ce qui permet de réduire dans la même proportion une course du vérin (4). Cela permet d'améliorer la stabili- té du dispositif de nettoyage (3) en minimisant un déplacement du centre de gravité du dispositif, le déplacement se produisant à chaque course du vérin (4), ainsi que d'augmenter la précision du nettoyage.As already discussed above, a major advantage of the invention is the fact that a displacement stroke of the nozzles is reduced to 1 / N of the length of the active surface of the cylinders, which makes it possible to reduce in the same proportion a stroke. of the cylinder (4). This improves the stability of the cleaning device (3) by minimizing a displacement of the center of gravity of the device, the displacement occurring with each stroke of the cylinder (4), as well as increasing the cleaning accuracy.
Dans une variante du dispositif le nombre des buses N est égal à quatre. L'avantage dans le cadre métallurgique est simplifier le dispositif (par exemple, éviter un nombre abusif de buses) et de même de réduire considérablement une durée pour un aller et retour complet des buses (311, 312, 321, 322) . Avantageusement, les N buses (311, 312, 321, 322) sont aptes à pulvériser un liquide à haute pression sur une sur- face du cylindre (1) . Une utilisation des buses à haute pression permet d'améliorer le nettoyage avec une quantité réduite de liquide de nettoyage. Un autre avantage est le fait qu'un jet à haute pression permet de profiter également d'un détachement mécanique des particules présentes sur la surface du cylindre, à part d'un détachement chimique provoqué par un détergent, ce que permet de réduire un pourcentage du détergent présent dans le liquide de nettoyage.In a variant of the device the number of nozzles N is equal to four. The advantage in the metallurgical framework is to simplify the device (for example, to avoid an excessive number of nozzles) and likewise to considerably reduce a duration for a complete return of the nozzles (311, 312, 321, 322). Advantageously, the N nozzles (311, 312, 321, 322) are capable of spraying a liquid at high pressure on a surface. face of the cylinder (1). Using high pressure nozzles improves cleaning with a reduced amount of cleaning fluid. Another advantage is that a high-pressure jet makes it possible to take advantage of a mechanical detachment of the particles present on the surface of the cylinder, apart from chemical detachment caused by a detergent, which makes it possible to reduce a percentage detergent present in the cleaning liquid.
Les N buses (311, 312, 321, 322) sont disposées à une distance mutuelle égale, ladite distance étant égale à une portion 1/N (inversement proportionnelle au nombre de buses N) de la longueur du cylindre (1) . La distance entre les buses est égale, permettant de définir pour chaque des N buses une partie à nettoyer exacte de la surface du cylindre, en évitant des zones de nettoyage superposées, donc superflues.The N nozzles (311, 312, 321, 322) are arranged at an equal mutual distance, said distance being equal to a portion 1 / N (inversely proportional to the number of nozzles N) of the length of the cylinder (1). The distance between the nozzles is equal, making it possible to define for each of the N nozzles an exact cleaning part of the surface of the cylinder, avoiding cleaning areas superimposed, therefore superfluous.
Dans une autre variante, le dispositif comprend des moyens d'ajustage d'une distance entre les N buses et le cylindre. Avantageusement cette variante permet de régler une largeur du jet pulvérisé par les buses, en d'autres termes de régler une surface de contact du jet avec le cylindre. Par exemple, dans des cas ou un nettoyage ponctuel est requis, la distance sera diminuée.In another variant, the device comprises means for adjusting a distance between the N nozzles and the cylinder. Advantageously, this variant makes it possible to adjust a width of the jet sprayed by the nozzles, in other words to adjust a contact surface of the jet with the cylinder. For example, in cases where spot cleaning is required, the distance will be decreased.
Le vérin (4) est disposé de façon à ce que sa course (minimisée en raison du nombre de buses placées de manière distribuée sur les support/bras attenants au vérin) soit parallèle à l'axe du cylindre (1). Du fait que l'invention prévoit que la course soit minimisée en raison du nombre de buses placées de manière distribuée sur les support/bras attenants au vérin, la parallélisme de cette même course est d'autant plus aisé à assurer, sans avoir recours à un système-vérin de positionnement lourd, encombrant, complexe et coûteux. Le dispositif comprend un moyen de commande adapté pour activer une première partie des N buses (311, 312, 321, 322) et simultanément pour désactiver une deuxième partie des N buses restantes lors d'un premier mouvement des N buses provoqué par une sortie du vérin (4), ledit moyen de commande étant aussi adapté pour désactiver la première partie et activer la seconde partie lors d'un deuxième mouvement des N buses (311, 312, 321, 322) provoqué par une rentrée du vérin (4) .The cylinder (4) is arranged so that its stroke (minimized due to the number of nozzles distributed in a manner on the supports / arms adjoining the cylinder) is parallel to the axis of the cylinder (1). Because the invention provides that the stroke is minimized because of the number of nozzles distributed in the arms / supports adjoining the jack, the parallelism of the same stroke is all the easier to ensure, without resorting to a positioning system-cylinder heavy, bulky, complex and expensive. The device comprises a control means adapted to activate a first part of the N nozzles (311, 312, 321, 322) and simultaneously to deactivate a second part of the remaining N nozzles during a first movement of the N nozzles caused by an output of the cylinder (4), said control means being also adapted to deactivate the first part and to activate the second part during a second movement of the N nozzles (311, 312, 321, 322) caused by a retraction of the jack (4).
L'avantage produit est ainsi qu'un gaspillage de liquide de nettoyage soit diminué et que le temps d'aller et retour des buses soit réduit. The advantage produced is that a waste of cleaning liquid is reduced and that the round trip time of the nozzles is reduced.
AbréviationsAbbreviations
1 = cylindre1 = cylinder
2 = paliers 3 = dispositif de nettoyage2 = bearings 3 = cleaning device
4 = vérin4 = cylinder
5 = axe du cylindre5 = cylinder axis
11 = longueur du cylindre11 = length of the cylinder
31 = premier bras 32 = deuxième bras31 = first arm 32 = second arm
41 = course du vérin41 = cylinder stroke
311 = première buse311 = first nozzle
312 = deuxième buse 321 = troisième buse 322 = quatrième buse312 = second nozzle 321 = third nozzle 322 = fourth nozzle
1-311 = première zone1-311 = first zone
1-312 = deuxième zone1-312 = second zone
1-321 = troisième zone1-321 = third zone
1-322 = quatrième zone 1-322 = fourth zone

Claims

Revendications claims
1. Dispositif de nettoyage d'un cylindre (1) d'une installation de transformation de bande d' acier, adapté pour un déplacement parallèle à un axe (5) dudit cylindre (1) , comprenant : au moins un nombre pair de buses N > 0 à pulvérisation parallèle, lesdites buses étant perpendiculaires à l'axe (5) du cylindre, un premier nombre N/2 des buses (311, 312) étant fixées à un premier bras (31) d'un support1. A device for cleaning a cylinder (1) of a steel strip processing plant, adapted for a displacement parallel to an axis (5) of said cylinder (1), comprising: at least an even number of nozzles N> 0 with parallel spraying, said nozzles being perpendicular to the axis (5) of the cylinder, a first number N / 2 of the nozzles (311, 312) being fixed to a first arm (31) of a support
(3) et un seconde nombre N/2 des buses (321, 322) étant fixées à un deuxième bras (32) du support (3), ledit support (3) étant couplé à un vérin (4), le vérin (4) ayant une course au moins égale à 1/N d'une longueur du cylindre (1) .(3) and a second number N / 2 of the nozzles (321, 322) being attached to a second arm (32) of the support (3), said support (3) being coupled to a jack (4), the jack (4 ) having a stroke at least equal to 1 / N of a length of the cylinder (1).
2. Dispositif selon la revendication 1, caractérisé en ce que le nombre des buses N est égal à quatre.2. Device according to claim 1, characterized in that the number of nozzles N is equal to four.
3. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les N buses (311, 312, 321, 322) sont disposées à une distance mutuelle égale, ladite distance étant égale à une portion 1/N de la longueur du cylindre (1) .3. Device according to any one of the preceding claims, characterized in that the N nozzles (311, 312, 321, 322) are arranged at an equal mutual distance, said distance being equal to a portion 1 / N of the length of the cylinder (1).
4. Dispositif selon l'une quelconque des revendications précédentes, comprenant des moyens d'ajustage d'une distance entre les N buses et le cylindre.4. Device according to any one of the preceding claims, comprising means for adjusting a distance between the N nozzles and the cylinder.
5. Dispositif selon l'une quelconque des revendications précédentes, comprenant un moyen de commande adapté pour activer une première partie des N buses (311, 312, 321, 322) et simultanément pour désactiver une deuxième partie des N buses restantes lors d'un premier mouvement des N buses provoqué par une sortie du vérin (4), ledit moyen de commande étant aussi adapté pour désactiver la première partie et activer la seconde partie lors d'un deuxième mouvement des N buses (311, 312, 321, 322) provoqué par une rentrée du vérin (4) . 5. Device according to any one of the preceding claims, comprising a control means adapted to activate a first part of the N nozzles (311, 312, 321, 322) and simultaneously to deactivate a second part of the N remaining nozzles during a first movement of the N nozzles caused by an output of the jack (4), said control means being also adapted to deactivate the first part and activate the second part during a second movement of the N nozzles (311, 312, 321, 322) caused by a retraction of the jack (4).
EP08874784.5A 2008-06-27 2008-06-27 Device for cleaning a roll of a rolling mill Active EP2303481B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2008/000920 WO2009156598A1 (en) 2008-06-27 2008-06-27 Device for cleaning a roll of a rolling mill

Publications (2)

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EP2303481A1 true EP2303481A1 (en) 2011-04-06
EP2303481B1 EP2303481B1 (en) 2013-10-16

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US (1) US20110168215A1 (en)
EP (1) EP2303481B1 (en)
CN (1) CN102076437B (en)
ES (1) ES2442267T3 (en)
WO (1) WO2009156598A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2592338C2 (en) * 2011-05-16 2016-07-20 Ниппон Стил Энд Сумикин Инджиниринг Ко., Лтд. Device for cleaning forming roll mill and method of cleaning
ITPC20120001A1 (en) * 2012-01-19 2013-07-20 Nordmeccanica Spa DEVICE AND METHOD FOR CLEANING ROLLERS OF A COATING GROUP
EP3546080A1 (en) * 2018-03-27 2019-10-02 Hydro Aluminium Rolled Products GmbH Rolling purification method with rolling purification device
CN110314884A (en) * 2019-05-28 2019-10-11 唐山钢铁集团有限责任公司 The control method of high pressure water trolley

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Publication number Priority date Publication date Assignee Title
US4893642A (en) * 1989-01-11 1990-01-16 Grapar Corporation Production line part deburring apparatus
US5460023A (en) * 1991-09-13 1995-10-24 International Rolling Mill Consultants Inc. Roll surface restoration system and method
WO2000003042A1 (en) * 1998-07-10 2000-01-20 Ipsco Inc. Method and apparatus for producing martensite- or bainite-rich steel using steckel mill and controlled cooling
DE19848174A1 (en) * 1998-10-20 2000-05-04 Bwg Bergwerk Walzwerk Method and device for cleaning rolls and / or rolls in strip casting plants, rolling mills and / or strip processing lines, in particular skin pass mills or the like
DE102004048619A1 (en) * 2004-10-06 2006-04-13 Sms Demag Ag Method and device for cleaning rollers

Non-Patent Citations (1)

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Title
See references of WO2009156598A1 *

Also Published As

Publication number Publication date
EP2303481B1 (en) 2013-10-16
US20110168215A1 (en) 2011-07-14
WO2009156598A1 (en) 2009-12-30
CN102076437A (en) 2011-05-25
ES2442267T3 (en) 2014-02-10
CN102076437B (en) 2014-03-19

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