Classifications

• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
  • C23C2/003—Apparatus
  • C23C2/0034—Details related to elements immersed in bath
  • C23C2/00342—Moving elements, e.g. pumps or mixers
  • C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
  • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
  • C23C2/06—Zinc or cadmium or alloys based thereon
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
  • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
  • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
  • C23C2/36—Elongated material
  • C23C2/40—Plates; Strips
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/53—Means to assemble or disassemble
  • Y10T29/53104—Roller or ball bearing

Definitions

• the invention relates to a device for placing at least one bottom roller in a liquid zinc bath of a continuous strip steel strip galvanizing line according to the preamble of claim 1.
• Figure 1 Typical arrangement of a galvanizing line by dipping steel strips in continuous scrolling.
• Figure 2 Typical arrangement of the zinc bath zone.
• FIG. 3 Typical Construction of a Roller Stand and Line Roller.
• a coating of zinc or zinc-based alloy is deposited on the surface of the steel strips.
• This coating is made on a continuous galvanizing line according to FIG. 1, which describes a typical arrangement of a galvanizing line for dipping continuous strip steel strip, which typically comprises:
• An inlet section with one or two belt unrollers 1, a guillotine shear 2, a stitching welder 3 to connect a tail of a belt from one of the unrollers 1 to the head of a next strip from the other unroller 1 and thus ensuring continuous operation of the line, a tape accumulator 4 which restores to the previously accumulated line of the tape when bearing upstream of the accumulator is stopped to perform a splicing weld,
• a degreasing section 5 cold rolled strips or acid pickling hot rolled strip • An annealing furnace 6 consisting of a heating section 7, a holding section 8, a cooling section 9 and a temperature-controlled holding section of the strip before it enters the zinc bath; a galvanizing section 11 comprising, in the strict sense, the zinc bath in which the steel strip is immersed; continuous scrolling, a device for wiping the liquid zinc 12 deposited on the strip, optionally an induction induction furnace 13, a cooling 14 and a quenching tank 15 of the strip,
• Figure 2 depicts a typical zinc coating arrangement for a continuous steel strip B in a bath of liquid zinc alloy 112.
• the strip B thereby exiting a sleeve 101 from a holding section to controlled temperature (section 10, Figure 1) plunges obliquely into the liquid zinc bath 112 contained in a coating tank 111.
• the band B is then deflected vertically by a bottom roller 113 immersed in the bath and then comes into contact with a anti-tile roll 114 for correcting a lateral curvature of the strip from its passage on the bottom roll, and then on a line roll 115 for adjusting the final vertical path of the strip B at the outlet of the coating bath .
• the strip B is thus covered on both sides with a layer of liquid zinc of more or less constant thickness which is transversely equalized and longitudinally between the dewatering devices 12 (see also Figure 1) of the liquid zinc.
• This arrangement of the members intended to deflect and maintain the band in the liquid zinc bath involves a set of structures able to support and maintain the said bodies immersed in the bath, organs necessary for the continuous conveyance of the band into the liquid bath. bath.
• this set of members comprises supports fixed to the ground on either side of a pit containing a liquid zinc crucible, a structure supporting the bottom roller and the pass-line roller, a supporting structure the anti-tile roller and fasteners of said structures on the supports fixed to the ground.
• the operating conditions of the immersed rollers are very difficult, and bearings supporting the ends of each of the rollers are subject to unavoidable degradation, which makes it necessary to maintain them at close intervals, of the order of 1 to 3 weeks. according to the required quality of the coated strip.
• This maintenance involves replacing the degraded equipment with replacement equipment in order to restart the galvanizing line with minimal loss of time.
• the roll holders are thus separated from a bearing structure located on either side of the liquid zinc crucible and transported to the maintenance workshop where the rollers are dismounted, freed of zinc adhesions, their re-machined tables if required and the bearings are changed.
• the rollers and their reconditioned bearings are then reassembled on the structures and their positions adjusted relative to the fasteners of the supports on the holding structures.
• the equipment is then available to be reassembled online.
• This reassembly on the galvanizing line is also preceded by a preheating of the supports and rollers to a temperature close to the operating temperature in the bath, in particular, to compensate for the inevitable dilations of the rollers and the metal supports which support them before immersion and fixation.
• the said roll carrying supports are then lifted by a handling means, such as a traveling crane often associated with a spreader, and are dipped immersed in the liquid zinc bath.
• the position of a center of gravity of the assembly varies constantly during the immersion, making the guidance from the roller towards pins or delicate fixing supports, especially in view of a high temperature environment and therefore of a hostile nature for operators providing said guidance.
• a bent shape of the carrying structure of the bottom roller and the line roller and a position of said rolls which can vary according to their wear, compared to a position of fasteners of the bearing structure of rollers on the ground supports, the naturally immersed position is variable and never allows to ensure a perfect contact of fixing plates of the carrying structure and the ground supports.
• a major object of the present invention is to present a device for setting up (immersion, removal) of rollers in a liquid galvanizing bath for a steel strip in continuous scrolling, said setting up being free of any human intervention in its environment.
• This device should a fortiori allow after installation of the roller, a use of positioning and fixing members (up to lock / lock) simple and fast, said bodies can also be operated remotely.
• this device should be able to be implemented on new installations or instead of the usual devices on existing installations.
• a device adapted for placing at least one roller in a liquid zinc bath of a galvanizing line of a continuous strip of steel is thus proposed according to claim 1.
• Embodiments of said device and their advantageous aspects are also transcribed by a set of subclaims.
• Figures 3a, 3b typical device of a bottom roller support and line roller ( Figures 3a, 3b respectively showing a front view and a side view with respect to the continuous movement of the steel strip);
• FIGS. 4a, 4b First embodiment of a device adapted for placing a bottom roller and a line roller according to the invention
• Figures 5a, 5b Second Embodiment of a Roller Bracket and Line Roller According to the invention
• Figure 6a, 6b Variant of the second embodiment.
• FIG. 3a (and FIG. 3b to better interpret the device in perspective), it is thus presented a typical device for supporting a bottom roller and a pass-through roll adapted for placing at least one roller.
• Pl working position
• the installation according to FIGS. 3a, 3b more particularly comprises a carrying structure composed of two supports (116) placed above and on either side of a pit containing the coating tank (111), itself comprising the zinc bath (112).
• the beam (117) extended by fixing brackets (118) is fixed by bolts (119) above the liquid bath (112).
• the bottom roller (113) is supported by two bearings (1131) which are themselves integral with the two arms (1132) and which are assembled with the beam (117) in an adjustable manner by means of a key or slide system (1133). ) and fixing bolts (1134).
• a roll of line (114) is carried by two bearings (1141) themselves secured to two arms (1142) which are assembled with the two arms (1132) in an adjustable manner by means of a control system.
• the movers ments (here in the form of a balance of the roll arms) to the working position (Pl) and the naturally immersed position (P2) of the bottom roll and the line roll are synchronous, so as to immerse or withdraw the two rolls in / of zinc bath.
• Figures 4a, 4b show a first embodiment of a device adapted for an implementation of bottom roller and pass line roller according to the invention.
• this first device is suitable for placing at least one roller in a liquid zinc bath of a galvanizing line of a continuously moving steel strip (B), comprising a beam (117) to which is connected a first (1132) pair of arms, the first pair of arms (1132) carrying a bottom roller (113), the roller being adapted to be immersed in the liquid zinc bath ( 112) (by means of moving the first pair of arms) to a working position of the bottom roller (P1, Fig. 4b where the bottom roller is plunged to its full immersion position in the zinc bath , said position being predefined and adapted to strip galvanization) relative to a naturally immersed position of the bottom roller (P2, Fig.
• Said device is characterized by: a) a second cylindrical support (1172) fixed to each of two ends of the beam (117) and distinct from the first cylindrical support (1171) on the same beam end section ( 117), b) a thrust device (11614) interacting with the at least one of the first and second cylindrical supports (1171, 1172) so that in the working position, the first and second cylindrical supports (1171, 1172) are held in a single predefined plane (here vertical), and that the first cylindrical support (1171) is disposed under the second cylindrical support (1172).
• the cylindrical supports (1171, 1172) are thus comparable to support bars / axes or rollers, fixed to and out of the lateral sections of the beam (117), said beam (117) itself supporting the first pair of arms (1132).
• a second pair of arms (1142) supporting a line roller (114) may also be attached to the beam (117) or to the first arm (1132) to provide synchronous movement of the bottom rolls (113). ) and pass line (114).
• the thrust device comprises a first pusher element (11614) able to rock the second cylindrical support (1172) with respect to the first cylindrical support (1171) housed in a half-bearing opening (1161). carrying, so that it can rotate freely about its own axis between the two positions called dive and survey.
• This first pusher element ideally has a contact surface having a curvature adapted to the cylindricity of the second cylindrical support (1172) so as to slide it better on the same contact surface, in particular during the plunge.
• the thrust device may also comprise a second pusher element (11613) cooperating by opposing (and synchronous) movement to the first pusher (11614) so as to pick up the second cylindrical support (1172) in working position of the roll background.
• the thrust and the tightening by means of the push elements (11613, 11614) are provided for example by hydraulic cylinders (not shown).
• the pushing elements (11613, 11614) of the thrust device are for example lockable by pinning or by a system with self-locking levers in the required working position during the galvanizing operation. No human intervention is therefore required for a plunging roll (x) as for maintaining the galvanizing position.
• Figures 5a, 5b show a second embodiment of a device adapted for an installation of bottom roller and pass line roller according to the invention.
• this second device is suitable for placing at least one roller in a liquid zinc bath of a galvanizing line of a continuously moving steel strip (not shown), having a beam (117) to which is connected a first (1132) pair of arms, the first pair of arms (1132) carrying a bottom roller (113), the roller being intended to be immersed in the bath of liquid zinc (112) (by means of moving the first pair of arms) to a working position (P1, Fig. 5b where the bottom roller is plunged to its full immersion position in the zinc bath, said position being predefined and adapted to the web galvanization) of the bottom roller relative to a raised position (P2, Fig.
• Said device is characterized by: a) a second cylindrical support (1172) fixed to each of two ends of the beam (117) and distinct from the first cylindrical support (1171) on the same beam end section ( 117), b) a thrust device (11614) interacting with at least one of the first and second cylindrical supports (1171, 1172) so that in the working position the first and second cylindrical supports (1171, 1172 ) are maintained in a single predefined plane (here close to the vertical), and that the first cylindrical support (1171) is disposed under the second cylindrical support (1172).
• the thrust device (11614) comprises two slide columns (1162). ) arranged such that an anti-pivoting of the first and second cylindrical supports (1171, 1172) is ensured during their lowering one above the other free slide between two sliding columns (1162) while maintaining an angle (A) for holding the first pair of arms (1132) relative to the vertical.
• the sliding columns exert a lateral thrust on the two cylindrical supports (1171, 1172) or rollers such that the bottom roll is placed at a desired height and side deviation of the columns (hence the angle -pivot A of arms) in the zinc bath.
• the two cylindrical supports (1171, 1172) are sliders that can be lowered in particular by pushing or mechanical lateral pressure between the two columns (1162) so that the bottom roller (113) reaches its final dive position at an angle (A) for holding the arms (1132).
• their guidance is advantageously very accurate to ensure a positioning of the bottom roller (113) also very accurate in the zinc bath (112).
• a second pair of arms (1142) supporting a line roller (114) may also be attached to the beam (117) or to the first arm (1132) to provide synchronous and accurate movement of the bottom rollers and line of pas- se.
• the slide columns (1162) each comprise at least one vertical guide track (11621) adapted to guide mechanically without human intervention each of the ends of the beam (117) here horizontal and connecting the arms of the first pair of arms.
• the alignment of the sliders (1171, 1172) in beam section (117) is inclined by the angle (A) relative to the first pair of arms (1132) as previously mentioned. In this way, it is thus possible to place the slides in a predefined plane close to the vertical in the working position and thus, to incline by precise adjustment the arms and the bottom roller of the angle (A) in the bath zinc (112).
• Figures 6a, 6b show a variant of the second embodiment of the device according to the invention (in connection with Figures 5a, 5b).
• Figure 6a shows a side view of the device in the same manner as in FIGS. res 5a, 5b.
• Figures 6b shows a perspective view of Figure 6a.
• the slide columns (1162) (initially guiding the roll dive) are themselves pivotable about a horizontal axis carried by a clevis (1163) underlying said columns and under the action of a turnbuckle or a jack (1164), placed laterally to the columns and resting on the screed.
• This mechanically controllable pivoting makes it possible to more precisely adjust the position of the structure in the galvanizing position, that is to say in the working position of the bottom roll and the line roll.
• the biasing device is unlockable by holding the beam off the slide columns (1162).
• the locking devices are released so as to allow the extraction of the supporting structure of the bottom roller by means of handling means such as a crane.
• the carrying structure of the bottom roller and the line roll includes locking means / locking the bottom roller in the working position adapted to ensure a firm positioning of the bottom roller and line of pass during the galvanizing phase.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Coating With Molten Metal (AREA)

Applications Claiming Priority (1)

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• 2008
  • 2008-07-21 US US13/055,205 patent/US20110119905A1/en not_active Abandoned
  • 2008-07-21 KR KR1020117001495A patent/KR20110042170A/ko not_active Application Discontinuation
  • 2008-07-21 EP EP08875604A patent/EP2300629A1/fr not_active Withdrawn
  • 2008-07-21 CN CN2008801304488A patent/CN102099504B/zh not_active Expired - Fee Related
  • 2008-07-21 BR BRPI0822961A patent/BRPI0822961A2/pt not_active IP Right Cessation
  • 2008-07-21 RU RU2011106296/02A patent/RU2468115C2/ru not_active IP Right Cessation
  • 2008-07-21 JP JP2011519202A patent/JP2011528754A/ja active Pending
  • 2008-07-21 AU AU2008359685A patent/AU2008359685A1/en not_active Abandoned
  • 2008-07-21 CA CA2731419A patent/CA2731419A1/en not_active Abandoned
  • 2008-07-21 WO PCT/FR2008/001075 patent/WO2010010236A1/fr active Application Filing

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