WO1994000605A1 - Metal band cooling apparatus and cooling method therefor - Google Patents

Metal band cooling apparatus and cooling method therefor Download PDF

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Publication number
WO1994000605A1
WO1994000605A1 PCT/JP1993/000843 JP9300843W WO9400605A1 WO 1994000605 A1 WO1994000605 A1 WO 1994000605A1 JP 9300843 W JP9300843 W JP 9300843W WO 9400605 A1 WO9400605 A1 WO 9400605A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
nozzle
metal strip
cooling device
roll
Prior art date
Application number
PCT/JP1993/000843
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
Naoto Kitagawa
Sugao Omori
Takaya Seike
Koji Ohmori
Masayuki Yamazaki
Hiroaki Sato
Hitoshi Oishi
Masafumi Suzuki
Osamu Yoshioka
Yasuhiro Araki
Hiroshi Sawada
Kazunori Hashimoto
Hideo Kobayashi
Shuzo Uchino
Hideki Sato
Original Assignee
Nkk Corporation
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
Priority claimed from JP5112488A external-priority patent/JPH06306485A/ja
Priority claimed from JP5152636A external-priority patent/JPH06340928A/ja
Priority claimed from JP5152634A external-priority patent/JPH06340913A/ja
Priority claimed from JP15263593A external-priority patent/JP3191495B2/ja
Priority claimed from JP5156361A external-priority patent/JP2979902B2/ja
Priority claimed from JP5156362A external-priority patent/JP2979903B2/ja
Priority to KR1019940700085A priority Critical patent/KR0159121B1/ko
Priority to EP93913561A priority patent/EP0614992B1/en
Priority to DE69324566T priority patent/DE69324566T2/de
Application filed by Nkk Corporation filed Critical Nkk Corporation
Priority claimed from JP5173684A external-priority patent/JPH0711346A/ja
Priority claimed from JP5173682A external-priority patent/JP2979908B2/ja
Priority claimed from JP5173683A external-priority patent/JP2906927B2/ja
Publication of WO1994000605A1 publication Critical patent/WO1994000605A1/ja

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5735—Details
    • C21D9/5737—Rolls; Drums; Roll arrangements

Definitions

  • the present invention relates to a metal strip cooling device and a cooling method for a heat treatment line. Background technology
  • Japanese Patent Application Laid-Open No. 60-169694 describes a device that cools the metal strip X on the contact surface while rotating around a plurality of cooling rolls # 1 to # 4.
  • the gas jet devices 1 to ⁇ 4 arranged opposite to the cooling rolls # 1 to # 4 are divided into multiple pieces in the width direction of the metal strip X as shown in Fig. 41.
  • thermometers 90a to 90d for detecting the temperature distribution in the sheet width direction of the metal strip X shown in the preceding figure are used.
  • the temperature difference at each point in the plate width direction with respect to the average temperature is calculated, and when this temperature difference exceeds the allowable limit, the position in the plate width direction is detected, and the gas flow regulating valve 84a to 84d corresponding to this position is detected.
  • a metal strip cooling device including a sheet temperature control device 87a to 87d for adjusting 84e.
  • the non-contact length L of the metal band at both ends of the metal roll and the cooling roll at the both ends by the above-described winding of the cooling roll, and the lifting amount Z at both ends are expressed by the following equations (11) and (12).
  • the present invention has been made in order to solve the above problems, and has a metal strip cooling apparatus and a metal strip cooling apparatus which can rapidly cool a wide range of sizes while making the sheet temperature in the sheet width direction uniform at a low operating cost and at a low operating cost. It does not propose a cooling method. Disclosure of the invention
  • the metal band cooling device of the present invention is a roll cooling device that adjusts the contact length between the metal band and each cooling roll by winding the metal band around one or more cooling rolls.
  • the configuration is basically characterized by having a pressure regulating valve and a gas supply blower, which will be described later, and a valve opening degree adjustment thereof, which is equivalent to a configuration of a plate temperature control arithmetic unit that performs blower rotation speed control).
  • the w-shaped non-uniform temperature distribution hot point described above is narrow in width, and if a plurality of nozzles are provided in the metal band width direction as in the conventional configuration, it may be located at a location corresponding to the partition wall. If there is such a hot point, it is difficult to cool that part. If you try to cool it forcibly, the part around the hot point will be supercooled. In this configuration, the narrow nozzle header of the gas cooling device is moved just above the hot point, By blowing the cooling gas whose pressure or flow rate has been adjusted by the adjusting device toward the hot point, intensive cooling of that part is performed, and the uneven temperature distribution is not eliminated efficiently. .
  • the nozzle header is movable in the direction of movement of the cooling roll because the cooling roll can move in the direction perpendicular to the metal band pass line to change the contact length. It is necessary to always keep the nozzle header at a suitable distance (in this case, move in the same direction as the cooling roll moves), and make sure that the header does not contact the metal strip. Therefore, immediately before the cooling roll moves away from the metal band pass line, the nozzle header moves in the opposite direction to the retract position. When the cooling roller starts to contact the metal band pass line, the nozzle position moves. The nozzle header moves in the opposite direction so as to approach the cooling roll.
  • the nozzle openings of the nozzle header have a slit shape formed in a direction substantially perpendicular to the pass line of the metal band, and are formed in the direction of the pass line. It is good to use what was perforated in one line.
  • the cross-sectional shape of the nozzle port 11 is such that the inner edge of the nozzle port 11 has a cross section R in order to improve the heat transfer coefficient and reduce the pressure loss.
  • the nozzle hole 11 may be formed in a shape such as a shape or a taper, or as shown in (c) and (d) of FIG.
  • nozzle headers When two nozzle headers are provided in the roll body length direction, they are arranged at the ends of the metal band in the width direction, respectively, and when three nozzle headers are provided, one of the nozzle headers is located near the center of the metal band width direction.
  • the nozzle header located on the center side may be fixed to the center without moving in the roll body length direction), and the other two may be arranged at the ends in the width direction of the metal strip.
  • it is effective to eliminate the non-uniform temperature distribution of the w-shaped plate. (The non-uniform temperature distribution is generally higher at both ends than at the center, so the nozzle header moves to both ends.) Priority).
  • the present invention can be applied not only to a configuration having one cooling roll but also to a configuration having two or more cooling rolls.
  • a configuration having a plurality of cooling rolls at least three nozzle headers are provided for at least the first cooling roll.
  • these cooling rolls are divided into two parts, a front part and a rear part, and three nozzle headers are provided for the cooling part in the front part, and the above header arrangement is adopted, and the following part is arranged.
  • the cooling roll it is advisable to use two nozzle headers and to arrange the headers in the same case.
  • nozzle headers are required for the first cooling roll or the preceding cooling roll because the center of the metal band bulges at the start of the cooling roll contact as shown in Fig. 45 (a).
  • the body of Roll # 1 where the plate X is not in contact due to the defective plate shape, is cooled by the refrigerant inside the cooling roll from the contacting portion, and even if the plate shape becomes better,
  • the central part of the sheet X is not cooled, and the central part of the sheet is stretched more than the both end parts due to the sheet temperature difference in the width direction, as shown in FIG. This is called medium bulge.
  • the non-uniform temperature distribution increases thereafter.
  • at least the first cooling roll or the preceding cooling roll is provided with a nozzle header also at the center, and intensive cooling of that part and from the back This is because the swelling problem can be solved by spraying the gas (the thick roll is especially effective with the first roll).
  • a nozzle header is provided for both ends of the metal band in the cooling roll that follows. It will be enough.
  • the movement of the preceding nozzle in the roll movement direction and the movement of the subsequent nozzle header are set to be different. You can also. That is, in order to eliminate the non-uniform temperature distribution in the plate width direction caused by the saddle type deformation or the like, it is necessary to take as much cooling amount as possible on the upstream side where the deformation is generated. Aim to quickly eliminate plate shape defects near the start of contact with the cooling rolls (otherwise, the heat load is extremely low, and even the cooling rolls in the preceding stage may be cooled without reaching the maximum pushing amount. Therefore, it is necessary to increase the cooling amount of the back roll of the preceding stage as much as possible, and the distance between the cooling roll and the roll is constant.
  • the configuration is such that the nozzle header in the preceding stage can follow the movement so that the cooling effect in the preceding stage is high. More specifically, with the start of contact between the metal strip and the cooling roll in the pass line, the nozzle header is moved in a direction approaching the metal strip from the retracted retracted position, and further from this contact. When the amount of pushing of the cooling roll is large, move the cooling roll so that the separation distance from the metal strip can be kept constant. Further, when the metal strip and the cooling roll come out of contact, the nozzle header is moved to the retract position. On the other hand, the latter nozzle header does not necessarily have such a requirement, and it may be fixed.However, when the cooling roll reaches the maximum pushing amount, the length of the opposing nozzle header is maximized.
  • the nozzle header in the subsequent stage is set to move to the predetermined position during normal cooling, and to be retracted to the retract position only in an emergency or when cooling is not performed, so as not to simply follow the movement of the cooling roll. You can also keep.
  • the nozzle header is moved from the retracted retract position to the direction approaching the metal strip, and thereafter, the pushing amount of the cooling roll increases. Also, the nozzle header is evacuated again to the retraction position immediately before the metal strip and the cooling roll are out of contact with each other.
  • the cooling roll since the cooling roll is pushed in in order to increase the winding length sequentially from the first cooling roll, when the required cooling rate is low, or When the cooling amount is low [ie, the heat load (t / h) is low] due to the thickness of the sheet, etc., the cooling roll on the downstream side has a large distance between the nozzle header for backside cooling and the metal strip (when the cooling roll is not Even if it comes into contact, the backside cooling by the nozzle header can be performed). In order to reduce the energy loss at this time, when the distance between the nozzle header and the cooling roll is longer than a certain distance, the shutoff valve of the gas supply path installed in each nozzle header is closed.
  • the amount of movement of the soda in the cooling roll moving direction is made different to these nozzles, and the distance between the die and the cooling hole is made to each nozzle.
  • the difference can be made in the roll body length direction.
  • Such a configuration can be used for such a habit removal when there is a difference in cooling capacity in the roll body length direction. Also, when there is enough cooling capacity, the use of equipment such as gas blowers can be reduced, which is also effective in saving power.
  • the line width is changed in the case of a line having a large plate width change.
  • the movement of the nozzle headers at both ends of the metal band in the roll body length direction cannot keep up, and as a result, a new problem arises in that it becomes impossible to cool the back surface of the appropriate hot point. Therefore, in this configuration, at least the nozzle headers located on both ends of the metal band are composed of multiple header bodies connected in the roll body length direction to cool the header body near the plate edge when the plate width changes. Increasing the gas pressure or gas flow can also cover delays in nozzle header movement (low response).
  • the configuration of the nozzle header 1 includes a plurality of connected header bodies 10 in the metal strip running direction and a plurality of nozzle openings of the header body 10.
  • the 11th haze can be provided so as to be shifted in the roll body length direction between the upstream and downstream stages, whereby the position of the partition wall in one stage is the nozzle port in the upper or lower stage.
  • each header body The nozzle openings in each header body are provided at appropriate intervals, so there is no problem when ejecting gas.However, in this configuration where a plurality of these header bodies are connected in the roll body length direction, however, if the nozzle ports are located at the same position between both sides (the same position in the direction of the barrel length), turbulence is likely to be generated by the cooling gas ejected from them, and effective cooling cannot be performed.
  • the nozzle header T0 configuration is, as shown in FIG. 4B, a metal band between the adjacent header bodies 10 by connecting the positions of the nozzle ports 11 provided in each of the connected header bodies 10 to each other.
  • the tension of the metal band is preferably changed to be higher so that the shape of the metal band at the time of the contact is stabilized.
  • FIGS. 48 and 49 another configuration for reducing the delay in the movement of the nozzle header includes, as shown in FIGS. 48 and 49, a gas cooling device for cooling the back surface of the cooling roll and / or a cooling roll outlet side described later.
  • Nozzle headers aa, hi (!, / 9a, / 5c) located at least on both ends of the metal band provided in the auxiliary gas cooling device, and the header body is separated into two or more in the running direction of the metal band. , Ac2, 5al, 3a2, / 5cl,? C2) and move them independently in the roll body length direction (or metal band width direction).
  • the upstream end nozzles (aal, cK? al, yff cl) is moved to both ends of the metal band after the change, and the downstream end nozzle headers (a a2, a c2, a2,? c 2) are also set immediately before the sheet width change part enters there.
  • Fig. 50 shows the movement of the end nozzle header when the width is changed from wide to narrow
  • Fig. 51 shows the change in the opposite width).
  • the above configuration may be installed not only as the configuration of the gas cooling device and the auxiliary gas cooling device but also as an auxiliary cooling configuration provided on the inlet side of the roll cooling device.
  • the width change connection information device (the connection order by welding etc. is tracked from the line entry side based on the loading order and width of the metal band, and the measured metal band length, and is sent to the cooling roll.
  • metal band end position detectors photoelectric tube and receiver, laser and receiver, metal band Detector using a metal strip width direction sheet thermometer (profile thermometer) that can be distinguished from the difference in temperature between the high temperature part of the part and the low temperature part around the metal strip or a combination of these detectors]
  • At least one of the directional plate thermometers is arranged on the inlet side of the cooling port, and information on the width change portion and the width change amount is obtained based on this information, so that the nozzle header for the width direction end is made of metal.
  • It can be set at the end in the band width direction. That is, when a singular point of a connecting portion having a different board width enters, the singular point, information is tracked from the line entry side, and when the material changes from narrow material to wide material, immediately before entering the special point, Movement of the nozzle header to the specified position (the nozzle header moves in the direction away from it) has been completed, and conversely, if the material changes from a wide material to a narrow material, wait until the singular point passes the exit side. Then, the nozzle header is started to move toward a predetermined position (the nozzle headers move in directions approaching each other).
  • the nozzle header be moved to a predetermined location in advance, and that the metal strip and the cooling roll be brought into good contact by cooling the rear surface at the time of changing to a wide material. good.
  • the metal strip has meandering, these nozzle headers will move together in the meandering direction.
  • the nozzle header is composed of multiple header bodies connected in the roll body length direction (the metal band width direction), or when the nozzle body of the nozzle header located at both ends is two or more in the metal band running direction
  • the abnormal cooling portion of the plate width changing portion can be further reduced, and the nozzle width can also be narrowed, so that overcooling of the peripheral portion can be reduced.
  • the gas cooling apparatus arranged opposite to the cooling roll under the condition that the sheet thickness, the speed or the sheet temperature drop amount in the cooling device is large.
  • two or more nozzle headers for spraying gas in the width direction of the metal band are disposed on the exit side of the cooling rolls or the group of cooling rolls so as to face the metal band.
  • an auxiliary gas cooling device having at least one (more preferably two, especially one at each end) of these nozzle headers, which is movable in the metal band width direction.
  • the problem can be solved by further using a gas adjusting device for adjusting the cooling gas pressure or the gas flow rate inside the nozzle header.
  • the nozzle header located on the side of the head is composed of a plurality of header bodies connected in the metal band width direction, and at least one of these nozzle headers is movable in the metal band width direction.
  • FIG. 49 at least the nozzle headers located at both ends of the metal strip are separated into two or more in the running direction of the metal strip, and these are independently separated in the width direction of the metal strip. It is also possible to adopt a movable configuration.
  • one or more of the width change connection information device, the metal band end position detector, and the metal band width direction thermometer as described above should be provided on the inlet side of the cooling roll to obtain this information.
  • the information on the width change part and the width change amount is obtained based on the above, and the nozzle header for the width direction end of the gas cooling device and the two nozzle headers at both ends in the metal band width direction of the auxiliary gas cooling device are connected to the metal band width. If they are set at the end portions in the direction, it is possible to move each nozzle header to a predetermined location in advance or after entering, at the point of entry of a special point of a connection portion having a different plate width. become.
  • a metal strip width thermometer is arranged on the outlet side of the cooling roll or the outlet side of the auxiliary gas cooling device, and based on the information, each nozzle header and nozzle or auxiliary of the gas cooling device is used. Feedback control for setting each nozzle header of the gas cooling device at the end in the metal band width direction can also be performed.
  • each nozzle header of the gas cooling device and / or It can be performed by adjusting the cooling gas pressure or gas flow rate of each nozzle of each nozzle of the auxiliary gas cooling device.
  • the setting of the two nozzle headers at the ends in the metal band width direction and the adjustment of the cooling gas pressure or the gas flow rate of these nozzle headers can be performed together.
  • the specific configuration of the gas cooling device is as follows: two or more nozzle headers, which are provided with nozzles for ejecting gas to the metal strip, are narrower than the width of the metal strip, and the nozzle headers are perpendicular to the metal strip surface. And / or a moving table that moves in the width direction of the metal band.
  • the nozzle is moved to the area where the metal strip temperature distribution is not uniform by the moving table, and the cooling gas is blown at an appropriate distance (if two pieces are not enough, the metal strip width direction
  • the temperature distribution in the metal band width direction can be controlled.
  • the temperature distribution in the width direction of the metal band can be made uniform, and furthermore, the uniformity of the temperature distribution in the width direction can be achieved, so that the cooling rate can be made uniform, and the plate can be made uniform in the width direction. Since the temperature can be brought close to the target temperature, problems such as defective materials and shapes can be solved.
  • the above configuration consists of cooling the back of a roll cooling device that cools the metal band by wrapping a metal band around one or more rolls whose interior has been cooled (in this case, the nozzle header is curved according to the curvature of the hole.
  • the saddle type deformation of the metal band is a cause of insufficient cooling at the end of the metal band in the roll cooling device.
  • the nozzle header is flat) or an auxiliary gas cooling device installed on the outlet side. It can also be used as an arrangement configuration (in this case, a flat nozzle header is mainly used).
  • the metal strip pass line in these facilities is horizontal or vertical.
  • this configuration is used as the auxiliary cooling configuration on the inlet side of the roll cooling device or the configuration of the auxiliary gas cooling device on the output side, in addition to the case where the nozzle header and the moving table are provided only on one side of the metal strip, These can be provided on both front and back sides. If these are provided on both the front and back sides of the metal strip, the hot point (including the portion that should become the hot point) can be cooled from both sides, increasing cooling efficiency and suppressing metal strip flapping. it can.
  • nozzle headers in the metal strip width direction move the headers on both ends in the metal strip width direction where the temperature increases, and if there are three nozzle headers near the center of the next hottest metal strip.
  • the remaining nozzles may be moved, and in some cases, these may be moved to an appropriate position in a direction orthogonal to the surface of the metal strip to cool the hot point by the nozzle header. If there are three nozzle headers in the metal band width direction, fix the middle header at the center and do not move it in the metal band width direction (it may be possible to move it in the orthogonal direction). It is also possible.
  • the cooling roll of the roll cooling device When the cooling roll of the roll cooling device is movable in a direction orthogonal to the metal strip pass line for adjusting the cooling amount, a range where the cooling roll does not come into contact with the metal strip on the pass line.
  • the (curved) size of the subsequent nozzle header is determined according to the maximum pushing amount, it is necessary to reduce the cooling load or evacuate the cooling roll in an emergency. Depending on the position of the cooling roll, contact may occur if the nozzle header is left at the maximum push of the cooling roll.] Then, move the nozzle header with the moving base to match the movement of the cooling roll.
  • the headers move together at any time, there is a problem other than when the roll is retracted, that is, when the roll is retracted from the pass line when starting up the line, the end of the header is in contact. Therefore, according to the movement of the roll, If it moves independently, it will be in the range where it does not come into contact with the metal strip at any time.) Or move independently of this movement. Fine adjustments can be made so as to maintain a high appropriate separation distance and achieve high-efficiency cooling with a minimum amount of gas.)
  • this configuration when this configuration is applied as a configuration of the auxiliary cooling installed on the inlet side of the roll cooling device, the temperature distribution in the width direction of the metal strip is eliminated before the roll is cooled, or the roll is cooled. It is better to cool the hot spot area by cooling so that the temperature distribution is close to the uniform temperature distribution that occurs when the roll is cooled. Because of this, non-uniform temperature distribution is likely to occur and is promoted.) Also, when this configuration is provided as a configuration of the auxiliary gas cooling device on the roll cooling device outlet side, the non-uniform temperature distribution generated and promoted by the roll cooling and the non-uniform temperature distribution that could not be eliminated by the cooling of the back of the roll is also considered. It is also effective to eliminate this rejection device.
  • the nozzle headers 1 are not arranged in a line in the metal band width direction, but the flow of the metal band X is performed.
  • the position of It is also possible to cool the entire non-uniform part by ejecting water.
  • the configuration of the auxiliary gas cooling device is such that a moving device that can move in a direction parallel to the surface of the metal band and perpendicular to the flow of the pass line is installed on the pass line of the metal band.
  • a configuration in which a flexible portion or an expansion joint portion is provided in a part of the gas supply path may be used.
  • the nozzle header is moved to the area where the metal strip temperature distribution is not uniform by the moving device and the cooling gas is blown (if one is not enough, two, three, etc. It is also possible to eliminate the non-uniform temperature distribution in the metal band width direction, thereby making the temperature distribution in the metal band width direction uniform. Cooling from achieving uniform temperature distribution in the width direction Since the speed can be made uniform and the sheet temperature made uniform in the width direction can be brought close to the target temperature, problems such as defective materials and shapes can be solved.
  • At least a moving device, a nozzle header attached to the moving device, and a gas supply passage having a flexible portion or an expansion joint provided in the nozzle header are provided on both front and back surfaces of the metal strip. It is also possible to adopt a configuration in which gas cooling can be performed from both sides.
  • the above configuration also has an auxiliary cooling configuration of the roll cooling at the inlet side of the roll cooling device (the saddle type is formed by previously cooling the metal band edge by such gas cooling before the roll cooling device). Deformation can be reduced, and plate temperature unevenness in the roll cooling device can be improved.)
  • the gas jet cooling structure provided before and after the roll cooling device in the cooling process from recrystallization temperature to overaging treatment Can also be used.
  • a roll cooling device for winding a metal band around one or more cooling rolls and individually adjusting a contact length between the metal band and each cooling roll, wherein the roll cooling device is arranged so as to face the cooling roll, It has three or more nozzle headers in the roll body length direction, and these nozzle headers are configured to be movable in the moving direction of the cooling roll, and at least one of these nozzle headers is moved in the roll body length direction.
  • a movement adjustment device for adjusting the movement in the direction, a nozzle header position control calculation device for controlling the movement adjustment device based on a detection signal of the metal band end position detector, and a cooling row.
  • a forward / backward adjusting device that adjusts the position of the nozzle header in the direction of movement of the cooling roll based on the position signal of the metal strip;
  • a plate temperature control that calculates the temperature deviation from the target plate temperature distribution based on the plate thermometer and the temperature signal from this plate thermometer, and adjusts the cooling gas pressure or gas flow inside each nozzle header according to this temperature deviation.
  • a metal strip cooling device with an arithmetic unit is also proposed.
  • the nozzle header is moved in the roll body length direction by the nozzle position control arithmetic unit based on detection data detected by the metal band end position detectors. This is because the position where the plate temperature distribution of the belt is high is substantially determined in the width direction.
  • a position where the sheet temperature distribution is particularly high should be set as the movement position of the nozzle header as the plate end of the metal band. Can also.
  • the non-uniformity is obtained by the feedback control by the sheet temperature control arithmetic unit which receives the detection data of the metal band width direction sheet thermometer arranged on the outlet side of the cooling port or the outlet side of the auxiliary gas cooling device described later.
  • the plate temperature distribution is eliminated, and the non-uniformity is eliminated by adjusting the cooling gas pressure or gas flow inside each nozzle header according to the temperature deviation from the target plate temperature distribution.
  • the preset target plate temperature distribution may be a preset one.
  • the average plate temperature of the two quarters in the width direction of the metal strip (in some cases, there is a plus wire) is the center of the plate width.
  • a target temperature of also be due to a sheet temperature of the actually measured middle portion (in some cases also be 0 e C ⁇ 2 O e C lower than the temperature of its) and the target temperature of the plate width end portions Unishi good.
  • the auxiliary gas cooling device as described above including a configuration in which at least two nozzle headers among these nozzle headers, in particular, one nozzle header at each end portion is movable in the metal band width direction
  • a configuration using a metal strip width direction thermometer arranged on the outlet side of the auxiliary gas cooling device may be used.
  • the length of the sheet temperature deviation portion with respect to the average sheet temperature in the sheet width direction generated at both ends of the metal strip is relatively narrow as obtained by the equation (11).
  • the average sheet temperature deviation ⁇ at the end of the metal band defined by the following equation (13) is determined by the cooling width and the sheet thickness as shown in Fig. 54. It changes greatly. Therefore, both end portions of the metal band are detected by the metal band both end position detectors, and based on the position signals, the nozzle headers at both ends are appropriately adjusted in the roll body length direction (or the metal band plate width direction) using a movement adjusting device. By adjusting the cooling width to a suitable value, the sheet temperature deviation can be minimized.
  • t Sheet thickness (mm)
  • the length of unsteady cooling in the metal strip longitudinal direction at the end of the sheet is made as short as possible.
  • the length of the unsteady portion is experimentally set to within 0.9Lo of the path length Lo between the rolls of the heat treatment furnace. Must be I found it necessary.
  • the relationship with the nozzle width of the nozzle header at the plate edge at this time is expressed by the following equation (16).
  • V Moving speed of nozzle header at both ends (practice / min)
  • the nozzle width Be of the nozzle header at both ends can be minimized by selecting the dimension of the following formula 1 or 2 to minimize the sheet temperature deviation occurring at both ends of the metal strip. (If the thickness of the metal strip is not constant and has a certain range such as 1 ⁇ Omn! To 2.Omm, the nozzle width Be is determined based on the maximum thickness.)
  • V Nozzle in chill roll body length direction (or metal band width direction)
  • FIG. 7 shows the sheet temperature distribution in the vicinity of the end of the metal strip, and it can be seen that the present invention achieves a uniform sheet temperature distribution with less supercooled areas than the conventional technique.
  • Table 1 The experimental conditions at this time are shown in Table 1 below.
  • Threading 248 ° C / min metal strip tension 3.l kgf / mm 2 Average cooling plate inlet side plate temperature 600 ° C
  • Cooling roll diameter 1800 Mars Cooling roll average winding angle 1 12 °
  • the nozzle width B e of each central nozzle header of the gas cooling device facing the cooling roll and the auxiliary gas cooling device installed on the cooling roll cluster side is obtained by the following formula (3).
  • W Width of metal band (mm)
  • the area where the sheet temperature deviation occurs is symmetrical with respect to the center line in the metal band width direction, so that the center of the metal band width direction and the center of the center nozzle coincide.
  • the movement can be adjusted by using the movement adjusting device in the mouth body length direction (or the metal band width direction).
  • Figure 58 shows a comparison of the equipment cost / operating cost between the conventional technology and the present invention. By reducing the amount of cooling gas and the number of valves, etc., it is possible to reduce equipment costs and operating costs as shown in the figure.
  • the nozzle headers at both ends of the metal band are formed of a plurality of header bodies connected in the roll body length direction, and these are formed by the roll body. What is made movable in the longitudinal direction may be provided as a configuration of the gas cooling device.
  • the nozzle position control arithmetic unit detects the position detected by the metal band end position detector. Based on the data, the nozzle header is moved in the roll body length direction.
  • the cooling gas pressure of the header main body near the plate both ends is required for the nozzle header having the connected configuration.
  • the sheet temperature control that inputs the detection data of the metal band width direction sheet thermometer placed on the exit side of the cooling roll
  • the non-uniform plate temperature distribution is eliminated by the feed pack control by the arithmetic unit.
  • the method of eliminating the non-uniformity is to adjust the cooling gas pressure or gas flow inside each nozzle header according to the temperature deviation from the target plate temperature distribution. Is carried out.
  • the metal strip has three or more gas blowing nozzle headers in the width direction of the metal strip, and at least the nozzle headers on both ends of the metal strip are connected in the width direction of the metal strip.
  • the problem is caused by the combined use of an auxiliary gas cooling device that is formed of multiple header bodies and is movable in the metal band width direction, and a gas adjustment device that adjusts the cooling gas pressure or gas flow inside each nozzle header. Is resolved.
  • At least one of the nozzle headers on both ends of the metal band is formed of a plurality of header bodies connected in the metal band width direction, and is movable in the metal band width direction. This is for the same reason that a similar configuration is provided for the configuration of the nozzle header in the gas cooling device.
  • the area of the sheet temperature deviation with respect to the average sheet temperature in the sheet width direction generated in the center portion of the metal strip is within the range shown in FIG. 57, and the gas cooling device installed opposite to the cooling roll and the cooling roll exit
  • the width Be of the header main body of each nozzle header at the center of the auxiliary gas cooling device installed on the side is determined by the above formula, so that the cooling gas pressure inside each nozzle header or If the gas flow rate is adjusted according to the plate temperature deviation, the plate temperature deviation occurring at the center in the plate width direction as described above can be minimized.
  • the width Be of the header body is a total of the dimensions shown in the following formula 17
  • the width of the outer header body Beo is the dimension of the following equation (4)
  • the width of the header body located at the center of the header is Bee the dimension of the following equation (5) and (6).
  • the thickness of the metal strip is not constant and has a certain range, such as 1. Omn! To 2. Omm, determine the nozzle width Bee based on the case of the maximum thickness.
  • the sheet temperature deviation occurring at both ends of the metal strip can be minimized.
  • Wd Change in the width of the metal band when connecting from a wide to a narrow metal band connection (mm)
  • the cooling roll used for the roll quench of the continuous annealing furnace is cooling roll # 1 having the structure shown in Fig. 59.
  • the cooling roll # 1 is provided with a spiral refrigerant passage a inside the roll near the surface thereof, and cools the roll surface by flowing a coolant such as cooling water from one end of the medium passage a. After removing heat from the metal strip in contact therewith, the refrigerant is discharged from the other end. Therefore, a very high heat exchange rate can be obtained depending on the setting of the flow rate of the refrigerant, and the cooling amount can be easily adjusted by changing the contact length with the metal strip. It has excellent advantages.
  • a roll cooling device generally uses a plurality of the above cooling rolls to # 7 and alternately contacts the front and back surfaces of the metal strip X to perform rapid cooling. have.
  • the supply of the refrigerant to the cooling rolls # 7 is performed by flowing the refrigerant from one side of the equipment to the medium passageway of each roll, and the high-temperature refrigerant is collected on the other side and sent to the refrigerant heat exchanger. Where it is cooled and reused.
  • Such a metal band X cooled by the cooling rolls # 1 to # 7 usually has a non-uniform w-type temperature distribution shown in FIG. 43 described above in the width direction. This is a phenomenon that occurs when the cooling roll is pushed into the metal strip X to which tension is applied in the pass line direction as described above, and both ends of the metal strip X are turned up to cause the saddle type deformation.
  • the solution to eliminate that phenomenon has been described above. Certainly, these configurations promoted the elimination of the above-mentioned non-uniform temperature distribution, but did not completely eliminate them. Rather, as shown in FIG.
  • the temperature deviation at both ends t 1 the temperature deviation at both ends t 1
  • the temperature deviation ⁇ 2 between the two portions of the quorum increases, and the state of non-uniform temperature distribution further disappears in the metal band X width direction.
  • the supercooling caused by the tension causes unevenness of the elongated shape of the metal strip X, which causes the meandering of the metal strip X in the subsequent processing furnace or the unevenness of the material of the metal strip X. You will be rolling.
  • a plurality of cooling rolls are provided in the direction of the metal pass line, and a configuration of a roll cooling device that cools the metal by bringing a metal into contact with the surface of the roll is provided. It is configured to supply the refrigerant by inverting it one by one.
  • the ordinary cooling roll has a single-passage medium passage provided inside the roll peripheral surface, so that a sufficiently low-temperature refrigerant can freely move inside the passage during the movement.
  • heat exchange with the metal zone continues, and the heat exchange at the outlet is almost saturated, and if it is water, it has reached the state just before boiling.
  • the refrigerant passages are provided in multiple rows on the same plane, each length of the refrigerant passages with respect to the required cooling amount can be shortened, and the exchange heat amount of each refrigerant flowing through the refrigerant passages is reduced. It can be reduced.
  • the cooling of the metal is sufficiently effective even on the end roll surface near the outlet of each refrigerant passage, and after cooling, the metal has a symmetrical temperature distribution in the width direction.
  • the cooling device of the conventional configuration in which the coolant is supplied to all the cooling ports from the same side and discharged from the other side.
  • a temperature gradient between the end roll surface near the entrance and the end roll surface near the exit will occur in the same direction on each chill roll.
  • the second configuration described above since the direction of the flow of the refrigerant in the refrigerant passage of each cooling roll is reversed and supplied one by one, the above-mentioned temperature gradient is reversed for each roll. And the temperature gradient itself disappears in the subsequent cooling rolls.
  • the present invention also proposes a cooling method that can rapidly cool the metal strip width direction sheet temperature distribution close to the target sheet temperature distribution with a low operating cost for a wider range of sizes. That is, the cooling method proposed here is a metal band cooling method in which a metal band is wound around one or more cooling rolls to adjust the contact length between the metal band and each cooling roll.
  • the moving direction of the cooling roll and Using a gas cooling device provided with a nozzle header narrower than the width of the metal band movable in the roll body length direction cooling gas is blown from the nozzle header to cool the rear surface of the metal band, and in cooling the metal band,
  • the center plate temperature is adjusted based on the deviation of the metal strip from the target plate temperature
  • the metal belt and the nozzle are determined based on the position of the cooling roll and the position of the nozzle header.
  • at least one of the inlet and outlet sides of the cooling roll is constantly monitored for the temperature distribution in the metal band width direction to eliminate the temperature deviation from the target sheet temperature distribution.
  • the plate temperature distribution control based on the deviation from the target plate temperature distribution is performed.
  • the width of the hot points formed at the center and both ends is narrow, and it is difficult to effectively cool this portion with the conventional configuration disclosed in Japanese Patent Application Laid-Open No. 60-169524.
  • the heater is moved to a narrow nozzle of the gas cooling device just above the hot point, and the cooling gas is blown out toward the hot point, thereby concentrating the portion. Cooling can be performed efficiently, and uneven temperature distribution can be efficiently eliminated.
  • the sheet temperature deviation is obtained. The temperature of the central part is adjusted based on the above.
  • the distance between the metal strip and the nozzle header is adjusted from the position of the cooling roll and the position of the nozzle header.
  • the temperature distribution in the metal band width direction is always monitored on at least one of the inlet side and the outlet side of the cooling roll, and the target sheet temperature distribution (this target sheet temperature distribution may be preset.
  • the plate temperature distribution is controlled (that is, the plate temperature distribution is made uniform) by moving the nozzle header to a position that eliminates the temperature deviation from the plate temperature distribution.
  • the cooling gas pressure or gas flow rate inside the nozzle header is adjusted based on the temperature deviation.
  • a configuration in which cooling gas is blown to the metal strip You may.
  • the premise that the nozzle header was movable in the direction of movement of the cooling roll was based on the premise that the cooling roll could be moved in a direction perpendicular to the metal band pass line in order to change the contact length. This is because it is necessary that the nozzle header always keeps a distance suitable for cooling the back surface of the roll, and that the header does not contact the metal strip.
  • the movement of these nozzle headers which is performed for sheet temperature distribution control based on the deviation from the target sheet temperature distribution, is performed at both ends of the metal strip.
  • the nozzle header is moved to a position where the temperature deviation from the temperature distribution is eliminated.
  • the non-uniformity of the w-shaped sheet temperature distribution is generally higher at both ends than at the center, as described above, and therefore, we decided to give priority to moving the nozzle header to both ends. It is.
  • a nozzle header may be separately provided at the center in the plate width direction to eliminate non-uniform temperature distribution. In that case, a structure that moves only in the direction of movement of the cooling roll but does not move in the roll body length direction is provided.
  • the plate temperature distribution control based on the deviation from the target plate temperature distribution, Only the cooling gas pressure or gas flow inside the header 'based on the temperature deviation is adjusted, and the cooling gas is blown to the metal strip.
  • the present invention can be applied not only to a configuration having one cooling roll but also to a configuration having two or more cooling rolls.
  • a configuration having a plurality of cooling rolls as described above, at least a nozzle is provided for at least the first cooling roll.
  • these cooling rolls are divided into two parts of the front part and the rear part, and three nozzle headers are provided for the cooling part of the front part.
  • the cooling roll at the subsequent stage should have two nozzle headers, and the header arrangement should be the same.
  • At least three nozzle headers are provided for the first cooling roll or the preceding cooling roll, for the same reason as described above.
  • a non-uniform temperature distribution occurs, and once the non-uniform temperature distribution occurs due to the characteristics of the cooling roll, the non-uniform temperature distribution increases thereafter.
  • a nozzle header is also provided in the center, and intensive cooling of that part and gas blowing from the back do not solve the problem of bulging in the middle. This is because Conversely, if at least the first cooling roll or the preceding cooling roll has a three-nozzle header configuration including the central nozzle header, the subsequent cooling rolls will have nozzle headers at both ends of the metal strip. It will be enough.
  • the nozzle head in the first stage can be configured to follow the movement of the cooling roll so that the separation distance from the roll becomes constant with the movement of the cooling roll. It may be set so that it is moved and evacuated to the retract position only in an emergency or when cooling is not performed, so that it does not follow the movement of the cooling roll.
  • cooling may be performed by maximizing the gas ejection capacity in order from the nozzle header on the upstream side, and the shortage may be compensated for on the downstream side, as described above.
  • average sheet temperature control is performed for the above three hot points. It is also possible. In this case, the control is performed by adjusting the contact length between the metal strip and the cooling roll, but the nozzle header of the gas cooling device installed opposite to each cooling roll is tracked by the metal strip wound around the cooling roll. It is effective for heat transfer to adjust the position while maintaining an appropriate separation distance in accordance with the above. If the distance between the nozzle header and the metal strip is 5 to 50mm, the cooling roll and nozzle This is effective in terms of the accuracy of each head movement adjustment and the prevention of contact between the metal strip with the defective shape (eg, edge wave) and the nozzle header.
  • the defective shape eg, edge wave
  • the sheet temperature distribution control based on the deviation from the target sheet temperature distribution is implemented.
  • the average sheet temperature deviation generated at the end of the steel band defined by the above equation (13) was calculated as shown in Fig. 54.
  • the thickness greatly changed depending on the sheet thickness. Therefore, while adjusting the distance between the metal band and the nozzle header from the position of the cooling roll and the position of the nozzle header, at least one end of the metal band is constantly monitored at least on the inlet side and the outlet side of the cooling roll.
  • the sheet temperature distribution in the metal band width direction is constantly monitored on the cooling roll exit side, and the deviation from the target sheet temperature distribution is calculated.
  • the cooling gas pressure or the gas flow rate inside these nozzle headers based on this and spraying the cooling gas on the metal strip, the unevenness of the sheet temperature distribution is eliminated.
  • the above configuration includes an auxiliary gas cooling device (a metal band width direction) that is provided auxiliary to the cooling roll exit side when unevenness of the plate temperature distribution is not solved by the configuration of the gas cooling device that performs cooling on the rear surface of the roll.
  • 3 or more nozzle headers, each of which is movable on the front and back sides of the metal band, are also applicable.
  • the temperature distribution is constantly monitored, and the center of gravity of the plate temperature deviation in the region where the temperature deviation occurs at the end and the center with respect to the target plate temperature is obtained, respectively, and the gas cooling device or the gas cooling device is used.
  • nozzle header at the end of the auxiliary gas cooling device For the nozzle header at the end of the auxiliary gas cooling device, move it so that the cooling width at the end is twice as long as the distance from the end of the metal strip at the center of gravity, and the nozzle at the center The header is moved so that the center of the header coincides with the center of gravity at the center of the metal band, and cooling gas is blown from each of these nozzle headers to the metal band.
  • FIG. 1 is a schematic diagram showing a continuous annealing furnace line configuration of a metal strip X having a roll cooling device provided with an embodiment of a metal strip cooling device of the present invention.
  • FIG. 2 is an explanatory view of a metal strip cooling device according to an embodiment of the present invention.
  • FIG. 3 is a perspective view of a gas cooling device arranged to face a cooling roll.
  • Fig. 4 is a perspective view of the auxiliary gas cooling device installed on the outlet side of the cooling roll group.
  • FIG. 5 is a perspective view of the gas cooling device according to claim 51 disposed opposite to the cooling roll.
  • FIG. 6 is a perspective view of the auxiliary gas cooling device of the embodiment installed on the outlet side of the cooling roll group.
  • FIG. 7 is a schematic diagram showing the configuration of a third embodiment in which the gas cooling device according to claim 32 of the present application is used for a roll back cooling configuration provided in a roll cooling device of a continuous annealing furnace for a metal strip. is there.
  • FIG. 8 is a partially enlarged view of the roll back cooling configuration of the present embodiment.
  • FIG. 9 is an explanatory diagram showing the configuration of the moving table of the present embodiment.
  • FIG. 10 is a plan view showing another embodiment configuration in which the gas cooling device according to claim 33 is used in a roll back cooling configuration in which the nozzle header at the center does not move in the left-right direction.
  • FIG. 11 is a cross-sectional view showing the cooling structure at the back of the mouth at the edge of the metal band.
  • FIG. 12 is a cross-sectional view showing the roll back cooling configuration at the center of the metal band.
  • FIG. 13 is a schematic diagram showing an example of the configuration of an embodiment in which the gas cooling device described in claim 34 is used as a roll rear cooling configuration for a roll cooling device for a horizontal metal band pass line.
  • FIG. 14 is a cross-sectional view of the portion of the cooling roll # 1 in the preceding figure.
  • FIG. 15 is a partially enlarged view showing a left-right movement configuration of the movable base in the present embodiment.
  • FIG. 16 is a cross-sectional view showing the moving configuration of the moving table in the left-right direction in the present embodiment.
  • FIG. 17 is a front view of a fourth embodiment of the auxiliary gas cooling device described in claim 41.
  • FIG. 18 is a side view of the auxiliary gas cooling device of the present embodiment.
  • FIG. 19 is an explanatory diagram showing an engagement state between the traveling carriage to which the nozzle header is attached and the guide rail.
  • FIG. 20 is an enlarged view showing the engagement state between the wheels of the upper traveling trolley and the guide rails.
  • FIG. 21 is an enlarged view showing the engagement state between the wheels of the lower traveling vehicle and the guide rails.
  • FIG. 22 is an explanatory diagram showing a drive synchronization configuration of the traveling mechanism.
  • FIG. 23 is an explanatory view showing a drive synchronization configuration of the upper traveling vehicle and the lower traveling vehicle.
  • FIG. 24 is an explanatory diagram showing the configuration of a pipe that follows the movement of the nozzle header in the present embodiment.
  • FIG. 25 is a cross-sectional view showing the configuration of a telescopic expansion joint.
  • Figure 26 is a metal strip
  • FIG. 4 is a plan view showing a cross section of this configuration applied to the roll cooling device when the pass line is horizontal.
  • FIG. 27 is a side view of the configuration of the embodiment.
  • FIG. 28 is an explanatory diagram showing the engagement state between the wheels of the traveling trolley on the entry side and the guide rails in the embodiment.
  • FIG. 29 is an explanatory view showing the engaged state of the wheels of the traveling trolley above the exit side and the guide rails in the embodiment.
  • FIG. 30 is an explanatory diagram showing the engagement state of the guide rails and the wheels of the traveling trolley below the entry side in the embodiment.
  • FIG. 31 is an explanatory diagram showing the engagement state between the wheels of the traveling truck on the exit side and the guide rails in the embodiment.
  • FIG. 32 is a sectional view showing a sectional structure of a cooling roll used in the roll cooling device.
  • Figure 33 is a development view showing the roll deployment state.
  • FIG. 34 is an explanatory diagram showing a cooling water flow system to the cooling rolls in the roll cooling device.
  • Fig. 35 is a graph showing the correlation between the heat transfer coefficient between the metal strip and the roll surface and the flow rate of the cooling water.
  • Figure 36 is a graph showing the correlation between the flow rate of the cooling water and the pressure loss of the pump.
  • FIG. 37 shows the heat transfer calculation for each roll, followed by the cooling rate CR (J), average cooling rate ACR, and average overall heat absorption rate AU of each roll.
  • FIG. 6 is a flowchart showing a procedure of the calculation.
  • FIG. 38 is an explanatory diagram showing a positional relationship between a metal band wound around two cooling rolls and a nozzle header of a gas cooling device.
  • Fig. 39 is a graph showing the sheet temperature distribution on the outlet side of the gas cooling device.
  • FIG. 40 is a side view of a cooling device for a metal strip showing one embodiment of the prior art.
  • FIG. 41 is a perspective view showing a configuration of a gas jet nozzle header used in the same configuration.
  • FIG. 42 is a graph showing the sheet temperature distribution in the sheet width direction when the sheet was cooled only by the cooling roll.
  • FIG. 43 is a perspective view showing a deformed state of the metal band when the metal band is wound around the cooling roll.
  • FIG. 44 is a cross-sectional view showing an example of the shape of the nozzle port provided in the nozzle header.
  • FIG. 45 is an explanatory diagram showing the state of the occurrence of the middle bulge at the center of the metal band.
  • FIG. 46 is an explanatory view showing the arrangement of the end nozzle headers in the vicinity of the connection portions of the metal strips having different plate widths.
  • FIG. 47 is an explanatory diagram showing the configuration of the nozzle header located at the end of the metal band.
  • FIG. 48 is a perspective view showing a state in which the nozzle headers at both ends of the gas cooling device for cooling the rear surface of the roll are separated in the running direction of the metal band.
  • FIG. 49 is a perspective view showing a state in which the nozzle headers at both ends of the auxiliary gas cooling device provided on the roll cooling device outlet side are separated in the metal band running direction.
  • FIG. 50 is an explanatory diagram showing a state of moving the separation nozzle header when there is a change in the plate width from a narrow material to a wide material.
  • Fig. 5 1 shows the sheet width from wide to narrow
  • FIG. 9 is an explanatory diagram showing a moving state of a separation nozzle header when there is a change.
  • FIG. 52 is a graph showing the heat cycle of continuous annealing of soft sheets.
  • Fig. 53 is an explanatory diagram showing an example in which the nozzle headers are slightly shifted in the flow direction of the metal strip when this configuration is used as the auxiliary cooling configuration on the inlet side or the outlet side of the roll cooling device. It is.
  • FIG. 54 is a graph showing the relationship between the cooling width of the plate edge and the sheet temperature deviation near the plate edge.
  • FIG. 55 is a schematic diagram showing the relationship between the nozzle position of the nozzle header of the gas cooling device and the cooling width at the plate edge when metal bands having different plate widths are connected.
  • Fig. 56 is a graph showing the sheet temperature distribution in the case where the sheet end of the metal strip is cooled by the gas cooling device arranged facing the cooling roll.
  • FIG. 57 is a graph showing the sheet temperature deviation at the center of the sheet and its range.
  • FIG. 58 is a graph showing a relative comparison between operating costs and equipment costs of the present invention and the conventional technology.
  • FIG. 59 is an explanatory view showing a conventional configuration of a cooling roll used for a roll quench of a continuous annealing furnace.
  • FIG. 60 is a schematic diagram showing the configuration of a roll cooling device that uses a total of seven cooling rolls and alternately contacts the front and back surfaces of the metal strip to rapidly cool the metal strip.
  • FIG. 61 is a graph showing a state in which the state of non-uniform temperature distribution is no longer symmetric in the metal band width direction.
  • FIG. 1 is a schematic view showing a configuration of a continuous annealing furnace line configuration of a metal strip X having a roll cooling device provided with an embodiment configuration of a metal strip cooling apparatus.
  • the metal strip X is unwound by the pay-off reel 2000, sheared by the entry shearing machine 2001, and then connected to the preceding coil and the following coil by the welding machine 2002.
  • the entrance looper 2005 through the tension leveler 2004 as a plate shape straightening machine.
  • Further heated to the preheating furnace is supplied to the 2006 and direct-fired type reducing furnace 2007 6 0 0 e C ⁇ 7 5 O e C, La di ant tube type heating furnace 2008 and radiant tube type soaking furnace predetermined 2009 After being heated to the temperature, it is soaked as it is, cooled to, for example, 600 ° C.
  • the roll cooling device 1000 After passing through the overage treatment zone 201 1 and the quenching furnace 2012 provided as an adjustment cooling facility with a cooling function, it was water-cooled and dried in the water cooling facility 2013 and the drying facility 2014. The surface of the plate is tempered, inspected by the surface defect meter 2017 and the oiling machine 2018, oiled, cut to a predetermined length by the outgoing shearing machine 2019, and wound up by the tension reel 2020 .
  • the configuration of the tension repeller 2004 is installed before the direct-fired reduction heating furnace 2007.
  • the reasons for the installation are described below.
  • the range of the burner flame formed in the direct-fired reduction heating furnace 2007 is limited to a range suitable for the reduction heating of the metal band X. Done.
  • the interval between the upper and lower rolls provided in the furnace must be at least 2 Om or more.
  • the metal strip X passing therethrough will be backed up between the rolls.
  • the shape of the metal band X may have irregularities or middle elongation at the center thereof, and a shape defect such as an ear wave at the end thereof.
  • the steepness a / w which is indicated by the ratio of the metal band width w to a
  • the shape defect becomes remarkable.
  • the distance between the upper and lower rolls provided in the furnace is at least 20 m or more, the metal band X will undulate due to the pressurizing pressure on the park as described above. Such undulation of the metal strip X causes the metal strip X to be out of contact with the perforated flame within the above-mentioned appropriate range of the perna flame, thereby causing a local oxidation problem.
  • the width of the metal band X The elongation that occurs at a predetermined location in the direction is not easily corrected, and when the sheet is passed through the gas jet cooling zone 2010 as it is, a narrowing occurs there. Insufficient contact or no contact, making it difficult to equalize the temperature distribution in the width direction of the sheet after final cooling. It is presumed.
  • a tension leveler 2004 for correcting the shape of the metal strip X is provided immediately before these heat treatment facilities, and thereby the shape correction is performed.
  • the present inventors have considered that these problems can be solved by heat-treating each of the metal strips X.
  • the shape correction of the metal strip X was performed with reference to this fact. It became clear that once the shape of the metal strip X was corrected just before the direct-fired reduction heating furnace 2007, the subsequent facilities would not have the problems described above. The above is the reason why the tension leveler 2004 is provided before the direct-fired reduction heating furnace 2007 in the present embodiment.
  • FIG. 2 is an explanatory view of a metal band cooling device according to an embodiment of the present invention as viewed from the side.
  • the metal strip X which was gradually cooled after heating and soaking, was given tension to the metal strip X in this cooling unit by bridging rolls £ 1 to £ 3 and £ 4 to £ 6 installed before and after the metal strip cooling device. Granted.
  • a gas cooling device having a set of three nozzle headers ⁇ 1 to ⁇ 4, a metal band end position detector 89 installed near the metal band cooling device entrance, and A movement adjustment device 82a to 82d for moving and adjusting these nozzle headers in the roll body length direction, and a nozzle header for controlling the movement adjustment devices 82a to 82d based on the detection signals of the metal band both end position detector 89.
  • the nozzle header groups a1 to 4 are adjusted in the cooling roll moving direction.
  • thermometer 90a placed on the outlet side of the cooling port group to detect the temperature distribution in the metal band width direction, and a temperature signal from the sheet thermometer 90a
  • the nozzle head position control arithmetic unit 88 calculates the roll body length of each nozzle of the nozzle header group ⁇ 1 to 4 based on the signal from the metal band both end position detector 89.
  • Direction position control commands are sent to the movement adjustment devices 82a to 82d. Therefore, the nozzle headers at both ends are moved and adjusted to the position corresponding to the end of the metal band, and the nozzle header at the center is moved and adjusted to the position corresponding to the center of the metal band.
  • the temperature signal from the sheet thermometer 90a installed on the exit side of the roll cooling device and capable of detecting the temperature distribution in the sheet width direction was used.
  • the sheet temperature at the center in the sheet width direction is obtained by the sheet temperature control arithmetic unit 87 based on the target sheet temperature set for performing a predetermined heat treatment on the metal strip X, and the sheet temperature at the center is obtained.
  • the temperature is compared by the control arithmetic unit 87, and the sheet temperature control arithmetic unit 87 A signal is sent to the adjusting roll contact length adjusting devices 80a to 80d to be adjusted.
  • the average temperature in the sheet width direction is obtained by the sheet temperature control arithmetic unit 87 based on the temperature signal from the sheet thermometer 90a.
  • the target temperature set for performing the predetermined heat treatment on the band X and the average temperature are compared by the sheet temperature control arithmetic unit 87, and in accordance with the deviation, the cooling temperature is calculated from the sheet temperature control arithmetic unit 87.
  • the signal may be sent to the contact length adjusting devices 80a to 80d).
  • the target temperature at the center in the sheet width direction and the measured sheet temperature at the center are calculated by the sheet temperature control arithmetic unit 87 to which the temperature signal from the sheet thermometer 90a is input, based on the average sheet temperature of both quarters. Then, the target temperatures at both ends of the plate are obtained, and the measured temperatures at both ends of the plate and the center of the plate are obtained, and these are compared with the target temperatures in the plate width direction.
  • the plate temperature control calculation device 87 uses at least one of the rotation speed control of the gas supply blower 85a and the opening adjustment of the pressure control valves 84a to 84d to control the cooling gas pressure inside each nozzle header (pressure). Adjustment is omitted). By the above adjustment, both ends of the metal band X and the central part of the metal band X are cooled by the gas ejected from the nozzle header groups ⁇ 1 to ⁇ 4 installed facing the cooling roll.
  • These nozzle header groups ⁇ 1 to ⁇ 4 are cooled by the advance / retreat adjusting devices 81a to 81d according to the positions of the cooling rolls # 1 to # 4 and the signals from the cooling port contact length adjusting devices 80a to 80d. The position is adjusted in the roll movement direction.
  • the nozzle headers 3 and 4 above are set at positions where the distance between the metal strip and the nozzle header group can be properly secured when the cooling rolls # 1 to # 4 are at the position where the maximum contact length can be obtained with the metal strip. And may be fixed.
  • the configuration of the auxiliary gas cooling device is provided on the outlet side of the cooling roll group, and even with the above cooling device configuration, it is difficult to completely overcome the metal strip X plate.
  • the temperature deviation in the width direction is eliminated. That is, according to the temperature signal from the sheet thermometer 90b or the sheet thermometer 90a installed near the outlet of the auxiliary gas cooling device and capable of detecting the temperature distribution in the sheet width direction, the sheet temperature control calculation device 87 The temperature and the temperature at the center of the plate are obtained and compared with the target temperature in the plate width direction, and at least one of the rotation speed control of the gas supply blower 85b and the opening degree adjustment of the pressure control valve 84e is adjusted in accordance with the deviation.
  • Each of the nozzle headers of the nozzle header groups 1 and / or 2 is provided with a position control command by the nozzle header position control arithmetic unit 88 which has received a signal from the metal band end position detector 89, and the movement adjusting devices 83a and 83b.
  • the nozzle headers at both ends are moved to the positions corresponding to the ends of the metal strip and the nozzles at the center are moved to the positions corresponding to the center of the metal strip by the movement adjusting devices 83a and 83b. The movement is adjusted.
  • FIG. 3 is a perspective view of the nozzle groups 1 to 4 arranged opposite to the cooling roll (in this drawing, the configuration of the advance / retreat adjusting device is omitted).
  • the nozzle headers a a and a c at both ends are used for cooling the plate edge
  • the center nozzle header a b is used for cooling the plate center.
  • These nozzle headers aa to ac are respectively controlled by the movement adjusting devices 820 to 822 according to the roll body length direction control command from the nozzle header position control arithmetic device 88, and the metal strip ends and the central portion are controlled. Moved and adjusted to the position.
  • the cooling gas pressure inside each of the nozzle headers a to c c is adjusted by a pressure from a plate temperature control arithmetic unit 87, which is installed in the middle of the piping leading to the nozzle headers aa to c.
  • the opening degree of the valves 840a to 840c is adjusted and implemented.
  • FIG. 4 is a perspective view of one side of a nozzle header group of the auxiliary gas cooling device disposed on the outlet side of the roll cooling device and opposed to the metal band.
  • the nozzle headers? A and /? C at both ends are used for cooling the plate edge, and the nozzle header /? B at the center is used for cooling the plate center.
  • These nozzle headers /? A ⁇ ? c is controlled by the movement adjustment devices 830 to 832 in accordance with the roll cylinder length direction control command from the nozzle head position control arithmetic unit 88, and moves to the position corresponding to the plate edge and center of the metal strip. It will be adjusted.
  • FIG. 5 is a perspective view showing the configuration of the nozzle header groups al and ⁇ 2 related to the gas cooling device of the metal strip cooling device described in claim 51 disposed opposite to the cooling roll.
  • the advance / retreat adjusting device is omitted in this drawing.
  • the central nozzle header ad (header body) shown in Figs. (A) and (b) is used to cool the center of the metal band, and both ends shown in Figs. (A) and (c).
  • the heads aa to c and ⁇ e to ag are used to cool the metal band edge.
  • aa and ag are the header body 10 located on the outside
  • ab and ⁇ f are the header body 10 located at the center
  • c3 ⁇ 4c and ae are the header body 10 located on the inside. is there.
  • the nozzle headers aa to ac and ae to ag at both ends of the metal strip are moved by the movement adjusting devices 820 and 822 in accordance with the position control command in the nozzle barrel length direction from the nozzle header position control arithmetic unit 88.
  • the nozzle header is positioned at the center, and is set at a position where an appropriate cooling width is ensured by the nozzle headers.
  • the cooling gas pressure inside each of the header bodies ab and af located at the center part of the nozzle header ad at the center part and the nozzle headers at both end parts C)
  • the cooling gas pressure inside each of the header bodies In the case of transition to a wider width, adjustment of the cooling gas pressure inside each of the header bodies aa and ag located on the outer side of the nozzle header on the end side, and conversely, the plate width shifts from wide to narrow
  • adjustment of the cooling gas pressure inside each of the header bodies ac and ae located inside is controlled by the sheet temperature control arithmetic unit 87b based on the signal from the computer C that has the metal band information of the next size. According to the order Will be.
  • FIG. 6 is a view showing a nozzle header group? 1, provided on an auxiliary gas cooling device in a metal band cooling device according to claim 52, which is provided on the outlet side of the cooling roll group and is arranged to face the metal band.
  • 3 is a perspective view of ff 2.
  • the header body ⁇ a ⁇ of the nozzle headers at both ends shown in Figs. c and /? e ⁇ ? g is used for cooling the end of the metal band.
  • a and> ff g are the header body located outside,?
  • B and 5 f are the header body located in the center, and 3 e and /? E are inside.
  • Header body /? A ⁇ ⁇ c and 5 e ⁇ ? g is moved toward both ends of the metal band by using the movement adjusting devices 830 and 832 in accordance with the position control command in the metal band width direction from the nozzle head position control arithmetic unit 88, and at that time, it is located at the center. Is set at a position where an appropriate cooling width is obtained by the header body /? B and /?
  • the inside of the header body at the center / 9 d and the inside of the header body at the center of the nozzle header at the end / b and 3 f The cooling gas pressure is adjusted in accordance with a control command from the sheet temperature control arithmetic unit 87a.
  • FIGS. 7 to 9 show an embodiment in which the gas cooling device is used for the back cooling structure of the nozzle provided in the roll cooling device of the continuous annealing furnace for metal strip X.
  • each nozzle header 1 is as shown in FIGS. 8 and 9.
  • the c the nozzle header 1 in the width direction hereinafter the horizontal direction hereinafter
  • straight direction orthogonal to the metal strip surface of the metal strip X mobile base 3 to move hereinafter referred to as longitudinal direction
  • the cooling rolls at the center and right and left are provided in the width direction of each cooling roll, and the curved size of the cooling roll on the rear side is determined according to the maximum pushing amount.
  • the gas outlet side surface is provided with a plurality of horizontally elongated slit-shaped nozzle openings. Behind it, a header supporting portion 100 for supplying a cooling gas from outside to the judder 1 and supporting the header 1 is provided. Since the header support portion 100 protrudes outside the furnace shell, a heat-resistant non-metallic jaw 101 is used between the periphery thereof and the penetrating portion of the furnace shell. Is ensured.
  • the moving table 3 includes guide rails 31 a and 31 b erected in the front-rear direction on the fixed table 30, a base 32 movable along the guide rails 31 a and 31 b, and a driving device for moving the base 32 in the front-rear direction.
  • 33 guide rails 34a to 34c independently erected in the left and right directions for the center and left and right on the base 32, and the horizontal movable bases 35a to 35c movable along the guide rails 34a to 34c.
  • Drive units 36a to 36c for independently moving the moving tables 35a to 35c in the left-right direction.
  • the header supporting units 100 are fixedly supported on the horizontal moving tables 35a to 35c.
  • the three nozzle headers 1 are simultaneously moved in the front-rear direction by the same amount by the driving device 33, but the nozzle headers 1 at the center left and right are independently moved left and right by the driving devices 36a to 36c.
  • the drive devices 33 and 36a to 36c are used for linear operation such as a hydraulic cylinder, an electric cylinder, a combination of a pole screw and an electric motor, and are used as guide rails 31a, 31b, 34a to 34c. If a linear bearing is used, the movement will be performed with high accuracy. It is desirable that the moving speed of the horizontal movement is determined by the following equation (18), and the moving speed of the front-rear movement is determined by the following equation (19). [Equation 18]
  • VN1 header moving speed (mm / niin)
  • VR Roll moving speed (mm / min)
  • the tension of the metal band X is changed to the roll use tension (3 kgf / mm 2 or more) by the bridle rolls £ 1 to £ 2.
  • each cooling roll # 1 to # 7 is moved in the horizontal direction, brought into contact with the metal strip X, and the cooling amount is adjusted while adjusting the pushing amount (contact length).
  • Non-uniform temperature distribution is likely to occur in the width direction of the metal band, and if such a non-uniform temperature distribution occurs in the preceding gas jet zone (not shown), it should be promoted by this roll cooling device. Therefore, the back surface of the roll is cooled by the gas cooling device. In the cooling of the back surface of the roll, there are adjustment of the movement of the nozzle header 1 in the front-rear direction and adjustment of the movement in the left-right direction, which will be described separately below.
  • the adjustment of the movement in the front-rear direction is as follows: the nozzle headers ⁇ 1 and ⁇ 2 that face the front cooling rolls # 1 and # 2, and the nozzle header ⁇ 3 that faces the rear cooling rolls # 3 to # 7.
  • the way of movement is different from ⁇ 7 group. That is, the headers ⁇ 1 and 2 move forward from the retracted retracted position, with the metal strip X in the pass line and the cooling roll and # 2 starting contacting with the maximum pushing amount, and Cooling rolls # 1 and # 2 When the push-in amount of the cooling rolls # 1 and # 2 decreases, the movement of the cooling rolls # 1 and # 2 decreases. Become) .
  • the headers 3 to ⁇ 7 are moved to the retracted retract position (the nozzle length at the maximum pushing amount of the nozzle). Is designed so that it can be removed as much as possible, so that when a certain roll becomes unusable due to a failure or the like, it moves once from the evacuation position (determined from the viewpoint of contact prevention), and then cools rolls # 3 to # 7 It does not move even if the pushing amount is large.
  • This difference in movement is due to the non-uniform temperature distribution in the width direction of the metal strip X caused by the saddle-shaped deformation of the metal strip X caused by the indentation of the cooling roll and the generation of a heat crown in the cooling roll. If not resolved early, the uneven temperature distribution will be further promoted (otherwise at very low heat loads, and even with # 2 cooling rolls, the maximum indentation cannot be reached. Cooling is also possible).
  • the temperature distribution in the metal strip X width direction is measured by the profile thermometer 91 on the exit side of the gas jet, and if the temperature distribution is non-uniform. Based on the measured data and the plate edge detection data from the profile thermometers 91 and 92, determine the cooling positions of the three nozzle headers 1 at the center and left and right for cooling the back of the roll, and determine the center in the width direction of the metal strip X and the left and right plate edges. Move these nozzle headers 1 individually to the hot point positions. The setting of the cooling position of the nozzle header 1 is also performed based on the measurement result of the sheet temperature distribution by the profile thermometer 92 on the roll cooling device outlet side.
  • the control of the cooling efficiency by blowing gas to each header is performed by controlling the amount of blowing gas or the gas pressure based on the measured value of the outlet profile thermometer 92.
  • Adjustment of the left and right movement of the nozzle header 1 is also necessary when connecting parts (singular points) with different plate widths enter.
  • this singular point information is tracked from the line entry side and changes from narrow material to wide material, before the singular point passes through the entry-side profile thermometer 91, the singular point is moved to a predetermined position on the left and right nozzle headers.
  • the singular point passes through the outlet-side profile thermometer 92, and then the left and right nozzle headers are directed to predetermined positions. And start moving.
  • each nozzle header is moved left and right in the rear, and cooling gas is ejected toward the hot point.
  • the sheet temperature distribution was non-uniform as shown in FIG. 42 in the X-width direction of the metal band, but by using the configuration of the present embodiment described above. Such unevenness in sheet temperature distribution was eliminated.
  • the sheet temperature deviation with respect to the average sheet temperature in the sheet width direction in the case of using the configuration of the present embodiment is smaller than that in the case of using the above-described conventional configuration. To a lesser degree, the plate temperature distribution was made uniform.
  • FIGS. 10 to 12 show an embodiment of the configuration according to claim 33, wherein the central nozzle header 1 does not move in the left-right direction, as described above. That is, the header support portion 100 of the central nozzle 1 is directly fixed on the base 32 of the moving base 3 of the embodiment (there is no guide rail 34b, lateral moving device 35b, driving device 36b, etc.). As shown in FIG. 11, the nozzle headers 1 at the left and right ends have a configuration capable of moving in the left and right direction, as in the above-described embodiment. In addition, in the state where the temperature distribution in the metal band X width direction is non-uniform, the temperature at the center of the plate is lower than that at the end of the plate. Therefore, in this embodiment, as shown in FIGS.
  • header 1 is smaller than that of left and right nozzle headers 1.
  • the above configuration is also applied when the pass line is horizontal.
  • FIGS. 13 to 16 show the configuration of claim 3.4 applied to the roll cooling device when the pass line of the metal band X is horizontal.
  • reference numerals # 1 to # 3 denote cooling rolls, and a curved nozzle header 1 is provided on the back surface thereof.
  • These header supports 100 are furnace shells , And protrudes to the outside, and a bellows 101 is attached to the penetrating portion.
  • FIG. 14 shows a cross section of the portion of the # 1 cooling roll in the preceding figure.
  • three nozzle headers 1 are provided in line with the width direction just above the metal strip X, and their header supporting portions 100 penetrate outside the furnace shell via bellows 101.
  • These header support portions 100 are supported by the movable base 3 so as to be movable in the front-rear direction and the left-right direction outside. That is, as shown in FIG. 15 and FIG. 16, the header support portions 100 penetrating the lift table 37 of the movable table 3 are provided with guide rails 34a to 34c installed on the lift table 37 in the left-right direction.
  • the header supporting portion 100 is connected to a rod of a driving device 36a to 36c, and is suspended from a horizontal moving table 35a to 35c that can move along the driving device 36a. To 36c, the three nozzle headers 1 can move left and right, respectively.
  • the elevating table 37 is connected to a rod of an elevating device 38a to 38b installed on a fixed portion of the furnace shell, and can be moved in the front-rear direction by driving the elevating devices 38a to 38b. .
  • FIGS. 17 to 18 show an embodiment configuration in which this configuration is used for the configuration of the auxiliary gas cooling device provided on the roll cooling device outlet side of the continuous annealing furnace for the metal strip X.
  • the cooling rolls # 1 to # 7 that are in contact with the metal strip X are continuously provided in the vertical direction, and further, the outlet side thereof
  • the configuration of the auxiliary gas cooling device of this configuration is provided in the same manner as in the third embodiment.
  • a guide rail 4 is laid horizontally parallel to the pass line of the metal strip X, and a traveling carriage 5 is provided along the guide rail 4 so as to be able to travel. It is established by the traveling carriage 5 has nozzles, which are narrower than the width of the metal strip provided with the gas ejection nozzles, and are parallel to the nozzle in the direction of the pass line, two on one side and four on the front and back. 1 to /? 4) Installed.
  • the traveling carriage 5 travels along the guide rail 4 by the traveling mechanism 6, thereby The header can be moved in the metal band X width direction.
  • each nozzle header is provided with a pipe 7 serving as a gas supply path, and this pipe 7 is branched into two at the center and connected above and below each nozzle header.
  • headers 5 and / or 6 (opposite side) are fixed to the central nozzle along the pass line substantially at the center of the metal strip X in the width direction.
  • the hot spot generated at the center of the metal strip in the X width direction can be cooled.
  • the hot point of this part is almost the same position even if the metal band X width changes, and since the normal temperature is lower than that at both ends in the metal band width direction, the header position does not change and its length is It is shorter than other nozzle headers.
  • the wheels 40 and 41 have a wedge-shaped cross section so that play does not occur when the wheels 500 having conical grooves of the upper traveling carts 50 to 53, which will be described later, are mounted.
  • the distance between the nozzle header and the metal strip X can be accurately determined.
  • the lower guide rails 42 and 43 take the shape of the spinning wheels of the lower carriages 54 to 57 in consideration of the effects of nozzle head thermal expansion and rail warpage.
  • both the upper and lower guide rails 4 are provided with shielding plates 502 on the side facing the metal band X so that they are not locally bent by the heat radiation from the metal band X. I have.
  • the traveling carriage 5 includes upper traveling carriages 50 to 53 in which the wheels 500 are mounted on the upper guide rails 40 and 41, and lower traveling carriages 54 to 53 in which the wheels 501 are loosely fitted in the lower guide rails 42 and 43.
  • 57 of which the upper carriages 50 to 53 are in a state where the nozzle heads are substantially suspended, and the lower carriages 54 to 57 have long nozzle headers parallel to the metal band X. So that it plays a role.
  • the nozzle header is long in the direction of the pass line.
  • a plurality of nozzles that are long in the width direction of the metal band X are provided on the surface in the longitudinal direction, and the nozzle width is determined in advance by the temperature distribution. Further, between the nozzle and the metal band X The gap must be such that the required heat transfer coefficient is obtained and contact with the metal strip X is avoided.
  • the nozzle headers are substantially suspended from the upper traveling vehicles 50 to 53, and are supported by the lower traveling vehicles 54 to 57 in an auxiliary manner.
  • the traveling mechanism 6 has a metal strip X provided on the outside of the furnace shell along the 4 directions of the guide rails.
  • a drive shaft 602 connected peripherally with an expansion 601 is provided, and one is provided on each side of the metal band X in the width direction to apply a driving force to each of the screw jacks 600.
  • the roller chain 606 is turned. That is, as shown in FIGS.
  • the driving motor 603a or 603b is provided on each side of the furnace shell, and the rotating shaft thereof is connected to the gear box 604 and branched into two shafts.
  • the shafts are respectively connected to the input shafts of screw jacks 600 installed on the lower side, and drive shafts 602 connected to each screw jack 600 are moved forward and backward. Since the respective drive shafts 602 are connected to the lower traveling vehicles 54 and 56 or 55 and 57, the lower traveling vehicles travel along the lower guide rails 42 and 43 as the drive shaft 602 advances and retreats. .
  • the synchronous rotating gear 605 for transmitting driving force which is attached to the shaft of both screw jacks 600, transmits its rotational driving force to the synchronous rotating gear 605 on the upper screw jack 600 by the roller chain 606, Move the drive shaft 602 connected to the screwdriver 600 in the same way. Therefore, with the rotation of one driving mode 603a or 603b, the four vertical traveling carriages 5 on both sides in the X direction of the metal strip can travel along the upper and lower guide rails 40 to 43 in synchronization with each other. become. Since this vertical carriage moves in the same direction by the same amount on both sides of the metal belt X, the nozzle heads ⁇ ⁇ ,?
  • Reference numeral 607 in FIG. 22 is a sensor for detecting the position of the header.
  • the sensor 607 reads the number of rotations of the screw wrench 600 and transmits it to the motor control device 608. Control the rotation of b It will be. At this time, the moving amount of the traveling vehicle is determined in consideration of the width of the metal strip X to be inserted.
  • the pipe 7 penetrates from the outside of the furnace shell to the inside, branches up and down there, and communicates with the upper and lower parts of one nozzle header. Cooling gas is supplied to the nozzle from the outside to the nozzle.
  • the pipe 7 since the nozzle headers /? 1 to /? 4 move in the metal band X width direction by traveling of the traveling carriages 50 to 57, the pipe 7 also expands halfway at the place where it is branched up and down. As shown in FIG. 24, the nozzle 70 can follow the movement of the nozzle yffl to /? 4 with the John 70 interposed.
  • the cooling amount adjustment by 1 to 34 is performed by adjusting the gas pressure or the gas flow rate of the cooling gas supplied by the pipe 7.
  • a telescopic 71 as shown in FIG. 25 may be interposed in the middle of the expansion joint, or a deformable flexible structure that can be used in an airtight state may be used. .
  • the operation state of the auxiliary gas cooling device of this configuration in the above roll cooling device will be described below. As described above, when the tension of the metal strip X is changed to the roll use tension (3 kgf / mm 2 or more) by the bridle rolls £ 1 to £ 2, the cooling rolls # 1 to # 7 are horizontally moved. To adjust the amount of cooling while adjusting the amount of contact (contact length) with the metal strip X.
  • the roll cooling device also cools the back of the roll with the above gas cooling device.
  • this roll back cooling the adjustment of the movement in the direction perpendicular to the surface of the metal band X of the above-mentioned cooling holes 1 to ⁇ 7 of the roll rear cooling header and the adjustment of the movement in the width direction thereof make these hot points.
  • the headers ⁇ 1 to ⁇ 7 are respectively moved, and the back surface of the portion is cooled while maintaining an appropriate separation distance.
  • the auxiliary gas cooling device of the present embodiment which is provided at the subsequent stage as an auxiliary cooling configuration of the roll cooling device, is intended to eliminate the nonuniform temperature distribution in the metal belt X width direction which cannot be removed by the above-described roll back cooling configuration.
  • the respective nozzle headers 51 to /? 4 are moved left and right in the rear, and the cooling gas is jetted from both sides of the metal strip X toward the hot point.
  • the temperature distribution in the metal strip X width direction was measured by the profile thermometer 92 on the exit side of the roll cooling device, and the temperature distribution was uneven. If so, the cooling positions of the four nozzle headers 1 to /? 4 are determined based on the measurement data and the plate edge detection data obtained by the profile thermometers 91 and 92. 603b to drive the traveling carriages 50, 52, 54, 56 and the traveling carriages 51, 53, 55, 57 separately, and move them to the hot strips at the left and right plate edges in the metal strip X width direction. Move the nozzle headers /? 1 and / 53, and? 2 and /? 4, which move together on both sides of the metal strip X, to the position.
  • the position of the hot point in the center does not usually change even when the plate width changes, and the temperature is lower than the end of the plate.
  • the nozzle headers 5 to 6 are fixed at the center and do not move, and the cooling capacity of the headers is also smaller than the left and right nozzle headers 51 to 4.
  • Adjustment of the movement of nozzle headers 1 to 4 in the metal band X width direction is also required when connecting portions (singular points) having different plate widths enter.
  • this singular point information is tracked from the line entrance side and changes from narrow material to wide material, before the singular point passes through the entrance-side profile thermometer 91, the nozzles are fed to these nozzles 1 to /? 4 has been moved to a predetermined position, and if the material changes from a wide material to a narrow material, the singular point passes through the outlet profile thermometer 92 and then goes to these nozzles. , Start to move soda 1 to / 5 4 toward a predetermined position.
  • FIGS. 26 to 31 show the structure of claim 41 applied to the roll cooling device when the pass line of the metal strip X is horizontal.
  • Fig. 26 is a plan view of one side of the horizontal pass line of the metal strip X.
  • a guide rail 4 is suspended in parallel with the pass line of the metal strip X, and a traveling carriage 5 is provided along the guide rail 4 so as to be able to travel.
  • the traveling carriage 5 has a nozzle header ⁇ which is narrower than the width of the metal strip provided with the gas ejection nozzles, and is installed in the pass line direction parallel thereto. Have been.
  • the traveling cart 5 is Line mechanism 6 (a total of eight screw guides 600 provided outside the furnace shell along the guide rails 4 direction, a drive shaft 602 connected around these by expansion 601, and these screws
  • Driving motors 603a and 603b for applying a driving force to the input shaft of the jackjack 600, respectively, a synchronous rotating gear 605 for driving force transmission provided on each rotating shaft of the screwjacket 600, and their synchronous rotation.
  • a roller chain 606 wound around the gear 605) and travels along the guide rail 4, so that the nozzle header can move in the metal band X width direction.
  • Fig. 28 shows the engagement state between the wheel 503 of the traveling carriage 51 above the entrance side and the guide rail 40 in the preceding figure
  • Fig. 29 shows the engagement state between the wheel 504 of the traveling carriage 55 above the exit side and the guide rail 42
  • Fig. 30 shows the engagement state between the wheel 503 of the traveling carriage 53 below the entry side and the guide rail 41
  • Fig. 31 shows the engagement state between the wheel 504 of the traveling carriage 57 below the exit side and the guide rail 43. Is shown.
  • the guide rails 40 and 41 on the upper and lower entrance sides prevent play when the wheels 503 having the conical grooves of the traveling carriages 51 and 53 are mounted.
  • the guide rails 42 and 43 on the upper and lower sides of the upper and lower sides of the upper and lower sides of the disk-shaped normal wheel 504 take into account the thermal expansion amount ⁇ 1 of the nozzle header. It has a planar configuration having a width of at least ⁇ 1 so that it can be slid.
  • a roll main body is composed of an inner cylinder 1001 having a water passage a as a refrigerant passage and an outer cylinder 1002 fixed therearound by shrink fitting.
  • the water passage a formed on the inner cylinder 1001 side has six lines a1 to a6 which are spirally arranged in parallel on the same plane, and spirally in the roll axis direction. ing.
  • the cooling water supply system for cooling rolls # 1 to # 7 has two cooling water supply pipes 1010 and two cooling water drain pipes 1011.
  • one water supply pipe 1010a and one drainage pipe 1011b are piped every other pipe, and on the other side, the corresponding drainage pipe 101la and water supply pipe 1010b are piped.
  • the water supply and drainage pipes are connected by the front and rear cooling rolls so that they are opposite each other. Therefore, the flow direction of the cooling water in the water passages of the cooling rolls # 1 to # 7 can be reversed and supplied one by one.
  • the number of the water passages is six (a1 to a6).
  • the general method of determining the number of waterways is shown below.
  • the flow velocity of the cooling water flowing into the water channel must be set to 1.3 to 4. Om / sec at the wall near the outlet side of the water channel where the temperature becomes high. This is because (1) it is necessary to prevent the cooling water from boiling in the water passage at the cooling hole of the roll cooling device with high heat load (large winding angle), and the flow velocity in that case is 1.3 m / (2)
  • the required amount of exchange heat is determined for each roll cooling device.However, the flow rate of cooling water in the water passage that can obtain the required amount of exchange heat or more is determined from Fig. 35 etc.
  • condition (1) is rate-limiting.
  • the flow velocity exceeds 4. Om / sec, as shown in Figure 36, the pressure loss of the pump that sends the cooling water will decrease by 4%. . 4 kg / cm 2 or more to reach, so that the power loss and scale adhesion during pressure drop increase is significant, the upper limit of the flow rate determined This is because to be.
  • the number of water passages satisfying these is selected from the above cooling water flow rate, roll outlet water temperature, cooling rate CR (J) of each roll, average cooling rate ACR, and average overall heat absorption rate AUo.
  • the calculation shown in the flowchart of FIG. 37 is as follows. First, the roll position [X (I), Y (I)] at the time of the maximum winding of the metal strip X is read, and that position is set as the initial value. And the roll length LS (I) of the metal band X and the winding angle AR
  • the roll exit plate temperature TSD Assuming the roll exit sheet temperature TSD, the cooling heat quantity Qs of the metal strip X is obtained from the following equation (20). (2) Using the cooling heat Qs as the heat Qw to carry away the cooling water, calculate the shell inner surface temperature TRS I from the following equation (21).
  • the outlet plate temperature TSD of the cooling roll is set as the inlet plate temperature TSI of the next cooling roll, and the other TWD and U are set.
  • the tension leveler 2004 is disposed in the upstream of the direct-fired reduction heating furnace 2007, so that the inside of the heating furnace 2007 can be obtained.
  • the plateability of the metal strip X is improved, and the reduction heating characteristics in the direct-fired reduction heating furnace 2007 can be stably obtained.
  • the tension leveler 2004 makes it possible to correct the shape of the portion where the metal strip X elongates.
  • the drawing and non-uniform cooling in the roll cooling device 1000 are reduced. It was greatly improved, and as a result, the meandering of the metal strip X in the line was eliminated, and the quality of the obtained product was improved.
  • the problem of contact with ⁇ 7 and the contact with the gas jet nozzle in the rapid heating furnace 2012 has also been eliminated.
  • the cooling water is supplied to the water supply system shown in FIG. 34, and the direction of the flow of the cooling water in all the six water passages a1 to a6 of each cooling roll. Is supplied in reverse for each roll.
  • a bridle roll of £ 1 After changing the tension of the metal strip X to the working tension of the roll (S kgfZmm 2 or more) with the pressure roll and £ 2, move each cooling roll # 1 to # 7 in the horizontal direction, contact the metal strip X, and further press the amount Adjust the cooling amount while adjusting (contact length).
  • each length of the water passages a1 to a6 can be shortened as a whole.
  • the amount of exchange heat of each cooling water flowing through the water channel can be reduced.
  • the cooling of the metal strip X is sufficiently effective even at the end roll surface near the outlet side of each water passage, and after cooling, the metal strip X has a substantially symmetrical temperature distribution in the width direction.
  • the direction of the flow of cooling water in each of the cooling rollers # 7 to # 7 is reversed and supplied one by one, it is close to the roll surface on the end side near the inlet side of the water channel and near the outlet side.
  • the temperature gradient between the end roll surface and each roll is reversed for each roll, and finally the temperature gradient itself disappears in the subsequent cooling roll.
  • the back surface of the roll is cooled by the metal band cooling configuration described below.
  • the sheet temperature distribution in the width direction of the metal strip X is detected by the sheet thermometer 90a installed on the outlet side of the cooling roll group to # 4, and based on the temperature signal, the sheet temperature control arithmetic unit 87 causes the sheet temperature in the center of the metal strip to be measured. And the target sheet temperature, and for the average sheet temperature control based on the sheet temperature deviation, the contact length adjusting device 80 adjusts the contact length between each roll of the cooling roll groups # 1 to # 4 and the metal strip X. Do.
  • the sheet temperature distribution control based on the target sheet temperature distribution first, make sure that the metal strip X does not come into contact with the nozzle headers 1 to 4 of the gas cooling device installed facing the cooling rolls # 1 to # 4.
  • the trajectory of the metal band X wound around these cooling rolls is obtained from the position of each roll of the cooling roll groups # 1 to # 4, and the gas cooling is performed using the advance / retreat adjusting device 81 so that the proper separation distance is obtained.
  • the gas cooling device and the cooling roll group # The position control arithmetic unit 88 estimates both ends and the center in the width direction of the metal strip X at the respective positions of the auxiliary gas cooling devices installed on the outlet side of Nos. 1 to # 4, and the above gas cooling device and auxiliary gas cooling device Using the movement adjusting devices 82 and 83 connected to the respective nozzle headers, the nozzle headers at both ends and the central portion are moved in the metal band width direction.
  • the cooling width (the cooling width of the overlapping part of the nozzle header and the metal band) shown in the formula (9) is used, and the center of the nozzle header at the center is in the width direction of the metal band and the center of the nozzle header.
  • the heads aa and ac of the nozzles at both ends of each gas cooling device installed opposite to the cooling roll are The position is adjusted by using the movement adjusting devices 820 and 822 connected to the nozzle headers at both ends, and the center nozzle header ab of the movement adjusting device 82 is connected to the movement adjusting device 821 connected to the center nozzle header. The position is adjusted using.
  • the nozzle headers a and /? C at both ends of the auxiliary gas cooling device installed on the outlet side of the cooling roll groups # 1 to # 4 are connected to the nozzle headers at both ends of the movement adjusting device 83.
  • the position is adjusted using the adjusted movement adjusting devices 830 and 832, and the central nozzle header / 5b is adjusted using the adjusted movement device 831 connected to the central nozzle header of the adjusted movement devices 83. The position is adjusted.
  • Cooling gas pressure pressure gauge is omitted
  • Adjustment is performed using at least one of the rotation speed of the cooling gas supply blowers 85a and 85b or the opening of the pressure control valves 84a to 84e, and the adjusted cooling gas is discharged. Spray on metal strip X.
  • the cooling gas is supplied from the inside of the furnace (omitted in FIG. 2) to each gas cooling device and the auxiliary gas cooling device through the heat exchange device 86 and the cooling gas supply blower 85.
  • the sheet thermometer is connected to the outlets of cooling rolls # 1 to # 4 and the outlet of the auxiliary gas cooling device. Although they are installed on each side, they may be installed only on the outlet side of the auxiliary gas cooling device.
  • the roll radius is F1 and F2
  • the distance between the roll centers is L0
  • the roll is from the reference line when the roll and metal strip X are not in contact.
  • the lengths protruding to the side are L1 and L2, the winding angle ⁇ between the roll and the metal band X, and the angles 7-1 and 772 of the nozzle headers ⁇ 1, ⁇ 2.
  • Equation 26 the coordinates of point ⁇ , which is the point of contact between metal strip X and lower cooling roll # 2, are expressed by Equation 26 below.
  • the first is the quantification of sheet temperature distribution. That is, the sheet temperature distribution in the metal band width direction can be expressed by a fourth power series represented by the following equation (35).
  • ⁇ (X) a 1 X + a 2 X 3 + a a X 2 + a i X + a 5
  • Equation 35 is obtained using the least squares method from the measurement results of the plate thermometer (90 in FIG. 2).
  • the position of the nozzle header in the metal band width direction is calculated. If the sheet temperature distribution in the sheet width direction on the side where the chill rolls come out obtained by the above quantification is as shown in Fig. 39, the temperature defect area on the higher temperature side than the target sheet temperature distribution T '(X) Is
  • XI, X2, X3, X4 High temperature side sheet temperature defective area boundary (Refer to the shaded area in Fig. 39).
  • the center of gravity Xe Xe 2 of the region where the plate temperature deviation occurs at the end and the center of gravity Xc of the region where the plate temperature deviation occurs at the center are calculated by the center of gravity calculation of the following equations (36), (37) and (38). Desired.
  • Equation 38 Accordingly, the end nozzle headers 1 and 2 are adjusted so that the end cooling widths le and le 2 are given by the following equations (39) and (40), and the center of the nozzle header ⁇ 2 at the center is positioned at the position of Xc. Adjust the cooling gas pressure inside the gutter to each nozzle according to the plate temperature deviation in each area, and spray the adjusted cooling gas to the metal strip X. Accordingly, it is possible to cope with a change in the sheet temperature distribution shape.
  • the nozzle head is moved to the area where the metal strip temperature distribution is not uniform by the moving table or the moving device.
  • the temperature distribution in the metal band width direction can be uniformly controlled by moving the die and blowing the cooling gas with an appropriate separation distance.
  • each length of the refrigerant passage can be shortened as a whole, and each of the refrigerant passages flowing through the refrigerant passage can be shortened.
  • the amount of exchange heat of the medium can be reduced.
  • the present invention can be applied to a roll backside cooling configuration of a roll cooling device in a heat treatment line for a metal strip.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
PCT/JP1993/000843 1992-06-23 1993-06-22 Metal band cooling apparatus and cooling method therefor WO1994000605A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE69324566T DE69324566T2 (de) 1992-06-23 1993-06-22 Kühlungsvorrichtung und -verfahren für metallband
EP93913561A EP0614992B1 (en) 1992-06-23 1993-06-22 Metal band cooling apparatus and cooling method therefor
KR1019940700085A KR0159121B1 (ko) 1992-06-23 1993-06-22 금속대 냉각장치 및 그 냉각방법

Applications Claiming Priority (24)

Application Number Priority Date Filing Date Title
JP4/187440 1992-06-23
JP4/187441 1992-06-23
JP18744192 1992-06-23
JP18744092 1992-06-23
JP4/187439 1992-06-23
JP18743992 1992-06-23
JP5/112488 1993-04-16
JP5112488A JPH06306485A (ja) 1993-04-16 1993-04-16 金属帯の熱処理装置
JP15263593A JP3191495B2 (ja) 1993-06-01 1993-06-01 金属帯のガス冷却装置
JP5152634A JPH06340913A (ja) 1993-06-01 1993-06-01 金属帯のガス冷却装置
JP5152636A JPH06340928A (ja) 1993-06-01 1993-06-01 冷却ロール及びそれを使用したロール冷却設備
JP5/152636 1993-06-01
JP5/152635 1993-06-01
JP5/152634 1993-06-01
JP5156361A JP2979902B2 (ja) 1992-06-23 1993-06-03 金属帯冷却装置
JP5/156362 1993-06-03
JP5156362A JP2979903B2 (ja) 1992-06-23 1993-06-03 金属帯冷却方法
JP5/156361 1993-06-03
JP5/173682 1993-06-22
JP5173684A JPH0711346A (ja) 1993-06-22 1993-06-22 金属帯ガス冷却装置
JP5173682A JP2979908B2 (ja) 1992-06-23 1993-06-22 金属帯冷却装置
JP5/173684 1993-06-22
JP5/173683 1993-06-22
JP5173683A JP2906927B2 (ja) 1993-06-22 1993-06-22 金属帯冷却装置

Publications (1)

Publication Number Publication Date
WO1994000605A1 true WO1994000605A1 (en) 1994-01-06

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Country Status (7)

Country Link
EP (1) EP0614992B1 (ru)
KR (1) KR0159121B1 (ru)
CN (1) CN1040130C (ru)
CA (1) CA2116230A1 (ru)
DE (1) DE69324566T2 (ru)
RU (1) RU2120482C1 (ru)
WO (1) WO1994000605A1 (ru)

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CN109116891A (zh) * 2018-08-01 2019-01-01 首钢智新迁安电磁材料有限公司 一种热处理炉带钢缓慢冷却的控制方法
CN110699522A (zh) * 2019-11-23 2020-01-17 宁波蜗牛锻造有限公司 一种用于控制臂的冷却设备结构
CN115889711A (zh) * 2022-12-22 2023-04-04 常州创明磁性材料科技有限公司 一种纳米晶带材在线冷却装置及冷却方法

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EP1375685B1 (en) * 2001-04-02 2007-10-10 Nippon Steel Corporation Rapid cooling process for steel band in continuous annealing equipment
SE524588C2 (sv) * 2002-12-23 2004-08-31 Sandvik Ab Förfarande jämte anordning för att kyla band- och trådmaterial
FR2897620B1 (fr) * 2006-02-21 2008-04-04 Stein Heurtey Procede et dispositif de refroidissement et de stabilisation de bande dans une ligne continue
JP5197967B2 (ja) * 2007-02-06 2013-05-15 三菱日立製鉄機械株式会社 水切り装置
DE102007053523A1 (de) * 2007-05-30 2008-12-04 Sms Demag Ag Vorrichtung zur Beeinflussung der Temperaturverteilung über der Breite
CN101993994B (zh) * 2010-11-29 2012-08-08 苏州中门子科技有限公司 带材热处理设备上的水冷装置
JP2014091157A (ja) * 2012-11-06 2014-05-19 Saco Llc 非晶質合金箔帯の製造装置および非晶質合金箔帯の製造方法
FR3014447B1 (fr) * 2013-12-05 2016-02-05 Fives Stein Procede et installation de traitement thermique en continu d'une bande d'acier
CN105648196B (zh) * 2014-10-11 2017-12-15 江苏菲亚德印务有限公司 钢带高频淬火机
TWI616537B (zh) * 2015-11-19 2018-03-01 財團法人金屬工業研究發展中心 金屬材熱處理方法
JP2019203186A (ja) * 2018-05-25 2019-11-28 光洋サーモシステム株式会社 熱処理装置および金属部品の製造方法
JP7139151B2 (ja) * 2018-05-25 2022-09-20 株式会社ジェイテクトサーモシステム 熱処理装置および金属部品の製造方法
CN109333374A (zh) * 2018-12-03 2019-02-15 山西太钢不锈钢股份有限公司 钢板表面氧化物去除方法
CN109722526B (zh) * 2019-01-15 2020-01-07 重庆市霆驰新材料科技有限公司 一种防止键合金丝退火后产生粘连现象的冷却装置
CN111571235B (zh) * 2020-05-12 2022-06-14 艾伯纳工业炉(太仓)有限公司 一种金属板材的热成型生产线
CN111593291B (zh) * 2020-06-24 2022-05-27 合肥学院 一种高温诱导钛锆基合金表面耐蚀氧化层的制备方法
WO2022083857A1 (en) * 2020-10-21 2022-04-28 Applied Materials, Inc. Drum device for use in a web coating process, web coating apparatus and method for controlling the temperature of a web in a web coating process

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109116891A (zh) * 2018-08-01 2019-01-01 首钢智新迁安电磁材料有限公司 一种热处理炉带钢缓慢冷却的控制方法
CN109116891B (zh) * 2018-08-01 2021-04-09 首钢智新迁安电磁材料有限公司 一种热处理炉带钢缓慢冷却的控制方法
CN110699522A (zh) * 2019-11-23 2020-01-17 宁波蜗牛锻造有限公司 一种用于控制臂的冷却设备结构
CN115889711A (zh) * 2022-12-22 2023-04-04 常州创明磁性材料科技有限公司 一种纳米晶带材在线冷却装置及冷却方法
CN115889711B (zh) * 2022-12-22 2024-01-23 常州创明磁性材料科技有限公司 一种纳米晶带材在线冷却装置及冷却方法

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DE69324566D1 (de) 1999-05-27
CN1040130C (zh) 1998-10-07
EP0614992B1 (en) 1999-04-21
EP0614992A1 (en) 1994-09-14
KR0159121B1 (ko) 1999-01-15
EP0614992A4 (en) 1996-10-30
CA2116230A1 (en) 1994-01-06
DE69324566T2 (de) 1999-10-28
RU94016952A (ru) 1997-02-27
CN1088621A (zh) 1994-06-29
RU2120482C1 (ru) 1998-10-20

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