JPH1034226A - Method for cooling high-temperature metallic sheet and device therefor - Google Patents
Method for cooling high-temperature metallic sheet and device thereforInfo
- Publication number
- JPH1034226A JPH1034226A JP19921496A JP19921496A JPH1034226A JP H1034226 A JPH1034226 A JP H1034226A JP 19921496 A JP19921496 A JP 19921496A JP 19921496 A JP19921496 A JP 19921496A JP H1034226 A JPH1034226 A JP H1034226A
- Authority
- JP
- Japan
- Prior art keywords
- water
- metal plate
- cooling
- cooling water
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高温金属板の冷却
方法及び装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cooling a high-temperature metal plate.
【０００２】[0002]
【従来の技術】高温金属板の製造工程においてその温度
を目標通りに設定することは、目的とする材質を得るた
めに、極めて重要である。例えば、熱延金属板の巻取り
時の温度は金属板の強度など機械的性質を決定する重要
な因子である。したがって、製品の材質を均一にし、品
質の高い製品を製造するためには、巻取り温度が目標通
りで一定となるような制御をしなければならない。巻取
り温度は、一般に、仕上圧延後に通過する冷却装置内で
製品の寸法や搬送速度などに応じて、水冷ゾーンの長さ
や、水冷ゾーン内で金属板に供給する冷却水量を調整し
ながら制御している。2. Description of the Related Art It is extremely important to set a desired temperature in a manufacturing process of a high-temperature metal plate in order to obtain a desired material. For example, the temperature at the time of winding a hot-rolled metal sheet is an important factor that determines mechanical properties such as the strength of the metal sheet. Therefore, in order to make the material of the product uniform and to manufacture a high quality product, it is necessary to control the winding temperature to be constant as intended. In general, the winding temperature is controlled while adjusting the length of the water-cooling zone and the amount of cooling water supplied to the metal plate in the water-cooling zone according to the dimensions and the conveying speed of the product in a cooling device that passes after finish rolling. ing.
【０００３】[0003]
【発明が解決しようとする課題】高温金属板が水冷冷却
装置内を通過する際、金属板の温度降下は水冷によるも
のと空冷によるものがあるが、通常は水冷によるものが
ほとんどであるから、設定された水冷ゾーン以外で冷却
水を高温金属板に供給するようなことがあってはならな
い。ところが現在の技術ではいくつかの問題点がある。When a high-temperature metal plate passes through a water-cooled cooling device, the temperature drop of the metal plate is caused by water cooling or air cooling. Cooling water must not be supplied to the hot metal plate outside the set water cooling zone. However, the current technology has several problems.
【０００４】水冷ゾーン内で高温金属板に対し下方から
供給した冷却水は、その位置でそのまま自然落下するの
で、水冷ゾーン通過後以降は高温金属板の冷却には関与
しなくなるが、水冷ゾーン内で高温金属板に対し上方か
ら供給した冷却水は高温金属板上に滞留したまま高温金
属板とともに搬送されるので、水冷ゾーン通過後以降も
引き続き冷却を行う。[0004] The cooling water supplied from below to the high-temperature metal plate in the water-cooling zone naturally falls at that position, and thus does not participate in cooling the high-temperature metal plate after passing through the water-cooling zone. Since the cooling water supplied from above to the high-temperature metal plate is conveyed together with the high-temperature metal plate while staying on the high-temperature metal plate, cooling is continued after passing through the water-cooling zone.
【０００５】水冷ゾーン通過後も高温金属板上面に冷却
水が滞留すると、その時の温度降下は本来行われるはず
の空冷の場合と比べて非常に大きいので、巻取り温度が
低くなりすぎ、精度のよい温度制御ができない。また、
高温金属板上面のみが冷やされると上面での熱収縮が下
面に比べて大きくなるので、製品の板厚によっては高温
金属板が上方向にそってしまい、冷却装置出側に設置さ
れた幅計測装置を通過する際の幅測定が困難となる場合
がある。If the cooling water stays on the upper surface of the high-temperature metal plate even after passing through the water cooling zone, the temperature drop at that time is much larger than in the case of air cooling, which is supposed to be performed. Good temperature control is not possible. Also,
When only the upper surface of the hot metal plate is cooled, the heat shrinkage on the upper surface becomes larger than that on the lower surface, so depending on the thickness of the product, the high-temperature metal plate may move upward and the width measurement installed on the exit side of the cooling device It may be difficult to measure the width when passing through the device.
【０００６】水冷ゾーン通過後は、高温金属板上面に滞
留する冷却水をなるべくすみやかに排除することが望ま
しい。従来は、水冷ゾーンよりも搬送方向下流におい
て、搬送ラインの側方に設置した噴射装置から高圧水を
高温金属板上面に噴射することによって滞留水を排除し
ていた。一方、近年、高温金属板の生産性を向上させる
ため圧延速度、つまり冷却装置内の搬送速度をより高く
設定する傾向にある。搬送速度が高くなればなるほど高
温金属板の各部分に上記高圧水が噴射される時間が短く
なるので、滞留水が排除されにくくなる。また、搬送速
度を上げても通板の安定性を損なわないように、搬送テ
ーブルのローラピッチを従来よりも小さくするなどの装
置改造が行われることもあるが、この場合、噴射水とこ
れによって高温金属板上面から排除した滞留水は、ロー
ラ間に落下しにくくなり搬送テーブルの側壁にぶつかり
跳ね返って再び高温金属板上面に載ってしまう。したが
って、搬送速度が高くなると水冷ゾーン通過後に高温金
属板上面に滞留する冷却水を排除することが難しくな
り、巻取り温度の制御性が悪化する。[0006] After passing through the water cooling zone, it is desirable to remove the cooling water staying on the upper surface of the high-temperature metal plate as soon as possible. Conventionally, high-pressure water has been sprayed onto the upper surface of a high-temperature metal plate from a spray device installed on the side of the transfer line downstream of the water-cooling zone in the transfer direction, thereby eliminating accumulated water. On the other hand, in recent years, there has been a tendency to set a higher rolling speed, that is, a conveying speed in a cooling device, in order to improve productivity of a high-temperature metal plate. The higher the transport speed, the shorter the time during which the high-pressure water is jetted to each part of the high-temperature metal plate, and the more difficult it is to remove the retained water. In addition, in order to keep the stability of the sheet passing even if the transport speed is increased, the equipment may be modified such as making the roller pitch of the transport table smaller than before, but in this case, the jet water and The stagnant water removed from the upper surface of the high-temperature metal plate is less likely to fall between the rollers, collides with the side wall of the transfer table, rebounds, and is again placed on the upper surface of the high-temperature metal plate. Therefore, when the transport speed is increased, it becomes difficult to remove the cooling water remaining on the upper surface of the high-temperature metal plate after passing through the water cooling zone, and the controllability of the winding temperature is deteriorated.
【０００７】また、搬送される高温金属板の幅が広く、
板端と搬送ラインの側壁との間隔が狹い場合も同様に、
搬送テーブルの側壁にぶつかり跳ね返った水が再び高温
金属板上面に載ってしまうという問題が発生しやすい。
本発明は、高温金属板の冷却装置内において前記のよう
な水冷ゾーン通過後にも金属板上面に冷却水が滞留する
という問題を解決し、高温金属板の冷却を精度よく行う
ことができる冷却方法及び冷却装置を提供することを目
的とするものである。Further, the width of the high-temperature metal plate conveyed is wide,
Similarly, when the distance between the plate edge and the side wall of the transfer line is narrow,
The problem that water that hits and bounces off the side wall of the transfer table and reappears on the upper surface of the high-temperature metal plate is likely to occur.
The present invention solves the problem that cooling water stays on the upper surface of a metal plate even after passing through the water cooling zone as described above in a cooling device for a high-temperature metal plate, and a cooling method capable of accurately cooling a high-temperature metal plate. And a cooling device.
【０００８】[0008]
【課題を解決するための手段】本発明は上記問題点を解
決するために開発されたもので、その技術手段は、搬送
中の高温金属板の冷却方法において、上面冷却水を供給
した直後に、金属板搬送ラインの一方の側方斜め上方か
ら他方の側方に向けて金属板の上面に水を噴射し、金属
板上面に滞留する冷却水を金属板搬送ラインの他方の側
方に直ちに排水除去することを特徴とする高温金属板の
冷却方法を提供する。DISCLOSURE OF THE INVENTION The present invention has been developed to solve the above-mentioned problems, and its technical means is a method for cooling a high-temperature metal plate being conveyed, immediately after supplying top surface cooling water. Water is sprayed on the upper surface of the metal plate from one side obliquely above the metal plate transfer line toward the other side, and cooling water remaining on the upper surface of the metal plate transfer line is immediately applied to the other side of the metal plate transfer line. Provided is a method for cooling a high-temperature metal plate, characterized by removing waste water.
【０００９】上記本発明方法を好適に実施することがで
きる本発明の装置は、搬送中の高温金属板を冷却する装
置であって、高温金属板の上面に冷却水を供給する冷却
水供給手段と、この手段の直後に配設され水平面内で高
温金属板の搬送方向に対して９０°以上、鉛直面内で水
平線に対して下向きに０°以上の角度をなす方向に金属
板上に水を噴射する噴射装置と、金属板搬送ラインの側
方の噴射方向の延長線上に冷却水及び噴射水を排出する
排出手段とを備えたことを特徴とする高温金属板の冷却
装置である。An apparatus according to the present invention which can suitably carry out the method of the present invention is a device for cooling a high-temperature metal plate being conveyed, and a cooling water supply means for supplying cooling water to the upper surface of the high-temperature metal plate. And water on the metal plate disposed immediately after this means in a direction at an angle of 90 ° or more with respect to the transport direction of the hot metal plate in the horizontal plane and at a angle of 0 ° or more downward with respect to the horizontal in the vertical plane. And a discharge means for discharging the cooling water and the spray water on an extension of the spray direction on the side of the metal plate transport line.
【００１０】本発明では、上面冷却水の供給が終了した
直後に、金属板上面に滞留する冷却水を直ちに排水除去
する。このことによって、従来に比べて冷却制御の精度
を格段に向上させることが可能となる。水の噴射方向
は、金属板搬送ラインの一方の側方斜め上方から少なく
とも搬送方向上流側に向けて金属板の上面に噴射する。
そして、金属板搬送ラインの他方の側方に直ちに排水除
去する。In the present invention, immediately after the supply of the upper surface cooling water is completed, the cooling water remaining on the upper surface of the metal plate is immediately drained and removed. This makes it possible to significantly improve the accuracy of the cooling control as compared with the related art. The water is sprayed on the upper surface of the metal plate from at least one side diagonally above the metal plate transfer line toward at least the upstream side in the transfer direction.
Then, the drainage is immediately removed to the other side of the metal plate transport line.
【００１１】本発明の装置は、冷却水供給手段の直後流
に配設され水平面内で高温金属の搬送方向に対して９０
°以上、鉛直面内で水平線に対して下向きに０°以上の
角度をなす方向に水を噴射する噴射装置を備える。水平
面内で高温金属板の搬送方向に対して９０°以上とは、
少なくとも搬送方向に対して直角又は上流側に向く方向
である。これによって、搬送される金属板上の滞留水が
搬送されるのを押し止め、金属板側方に排出することが
可能となる。また、鉛直面内で水平線に対して下向きに
０°以上の角度をなす方向に金属板上に高圧水を噴射す
るので、金属板上面の滞留水を排除することが可能とな
る。そして、金属板搬送ラインの側方の噴射方向の延長
線上に冷却水及び噴射水を排出する排出手段を備えるこ
とによって、噴射水は金属板上面の滞留水を巻き込んで
そのまま排出口に流れ込み、金属板上面の滞留水の排水
を完全にすることができる。[0011] The apparatus of the present invention is disposed immediately downstream of the cooling water supply means, and is located 90 degrees in the horizontal plane with respect to the direction of transport of the hot metal.
Injection device for injecting water in a direction at an angle of 0 ° or more in a vertical plane with respect to a horizontal line at an angle of 0 ° or more. 90 ° or more with respect to the transport direction of the high-temperature metal plate in the horizontal plane
This is at least a direction perpendicular to the transport direction or an upstream side. Thereby, it is possible to prevent the stay water on the conveyed metal plate from being conveyed, and to discharge the water to the side of the metal plate. Further, since high-pressure water is sprayed onto the metal plate in a direction making an angle of 0 ° or more downward with respect to the horizontal line in the vertical plane, it is possible to eliminate water remaining on the upper surface of the metal plate. By providing a discharge means for discharging the cooling water and the jet water on an extension of the side of the metal plate transport line in the jet direction, the jet water entrains the stagnant water on the upper surface of the metal plate and flows into the discharge port as it is. The accumulated water on the plate upper surface can be completely drained.
【００１２】以上のように、側方からの高圧水の噴射方
向を水平方向ないしは斜め下方とするから、金属板上面
に滞留する水を押し寄せ、排除することができる。ま
た、水平面上で高温金属板の搬送方向とほぼ直角方向又
は上流側に向けて噴射するから、滞留水を噴射装置と反
対側に排出することができる。高温金属板の長手方向の
複数の箇所について、板厚、冷却開始温度（通常は仕上
げ圧延終了直後の温度）、目標巻取り温度、搬送速度パ
ターンなどの条件に従って、開放するバルブの数を求め
る設定計算を行う。この設定計算で見積もる熱伝達係数
は、通常、冷却水が供給されるゾーン（以下、水冷ゾー
ンとよぶ）で数百Ｗ／ｍ2 ℃、冷却水を供給しないゾー
ン（以下、空冷ゾーンとよぶ）で数十Ｗ／ｍ2 ℃であ
る。空冷ゾーンの冷却能力は水冷ゾーンの冷却能力と比
べて小さいが、搬送方向上流で供給された冷却水が高温
金属板上に滞留し、そのまま移送されるとこの間の温度
降下は、空冷として見積もっていたものよりも大きくな
ってしまう。滞留水がある状態での熱伝達係数を予め求
めておけばよいという考え方もあるが、高温金属板上に
冷却水が滞留するかどうか、あるいはどれだけの時間滞
留するかというのは、高温金属板の幅や形状、搬送速度
などによって異なり、再現性が非常に悪い。したがって
巻取り温度の精度を向上させるためには、水冷ゾーンを
通過した直後に高温金属板上の滞留水を完全に排除し、
冷却装置内の各位置で、設定計算で見積もったとおりの
冷却能力を得ることが必要である。このために、水を噴
射して滞留水を排除する手段を用いる。上述のように、
水冷ゾーンの長さは、板厚、冷却開始温度、目標巻取り
温度、搬送速度パターンなどによって変わるからスプレ
ーは冷却装置内にある程度の間隔で複数設置することが
望ましい。As described above, since the high-pressure water is sprayed from the side in the horizontal direction or obliquely downward, water staying on the upper surface of the metal plate can be pushed in and eliminated. In addition, since the water is sprayed on the horizontal surface in a direction substantially perpendicular to the transport direction of the high-temperature metal plate or toward the upstream side, the retained water can be discharged to the side opposite to the spraying device. Setting to determine the number of valves to be opened at multiple locations in the longitudinal direction of the high-temperature metal sheet according to conditions such as sheet thickness, cooling start temperature (usually immediately after finishing rolling), target winding temperature, and transfer speed pattern. Perform calculations. The heat transfer coefficient estimated by this setting calculation is usually several hundred W / m 2 ° C in a zone where cooling water is supplied (hereinafter referred to as a water cooling zone), and a zone where cooling water is not supplied (hereinafter referred to as an air cooling zone). And several tens of W / m 2 ° C. Although the cooling capacity of the air cooling zone is smaller than the cooling capacity of the water cooling zone, if the cooling water supplied upstream in the transport direction stays on the hot metal plate and is transported as it is, the temperature drop during this time is estimated as air cooling. It will be larger than the one that was. There is an idea that the heat transfer coefficient in the presence of stagnant water may be determined in advance.However, whether or not cooling water stays on a high-temperature metal plate, or how long the stagnant water stays, depends on the high-temperature metal. The reproducibility is very poor, depending on the width and shape of the plate, the transport speed, etc. Therefore, in order to improve the accuracy of the winding temperature, the water remaining on the hot metal plate is completely eliminated immediately after passing through the water cooling zone,
At each position in the cooling device, it is necessary to obtain the cooling capacity as estimated by the setting calculation. For this purpose, a means for injecting water to remove the retained water is used. As mentioned above,
Since the length of the water cooling zone varies depending on the plate thickness, the cooling start temperature, the target winding temperature, the transfer speed pattern, and the like, it is desirable that a plurality of sprays be provided at a certain interval in the cooling device.
【００１３】水の噴射は水冷ゾーンが終了する位置より
金属板搬送方向下流側であって、そこから最も近い位置
にあるスプレーを噴射させる。噴射させるスプレーの数
は１個でもよいが、金属板上の滞留水をより完全に排除
したい場合は２個以上としてもよい。噴射水は高圧であ
る必要はなく、低圧でも滞留水を反対側に押し寄せるた
めに、噴射量を多くすればよい。The water is sprayed at a position downstream of the position where the water-cooling zone ends and in a position closest to the metal plate in the metal sheet transport direction. The number of sprays to be sprayed may be one, but two or more sprays may be used when it is desired to completely remove the water remaining on the metal plate. The injection water does not need to be at a high pressure, and the injection amount may be increased to push the stagnant water to the opposite side even at a low pressure.
【００１４】本発明の装置を用いると、水冷ゾーン通過
後に金属板上面に滞留する冷却水の影響によって発生し
ていた冷却むらがなくなる。これによって、高温金属板
の巻取り温度などの温度制御性が飛躍的に向上し、材料
の機械的強度などの性質にむらがなくなり、高品質な金
属板製品を製造することが可能となる。The use of the apparatus according to the present invention eliminates uneven cooling caused by the effect of cooling water remaining on the upper surface of the metal plate after passing through the water cooling zone. Thereby, the temperature controllability such as the winding temperature of the high-temperature metal sheet is remarkably improved, and the properties such as the mechanical strength of the material are not uneven, and a high-quality metal sheet product can be manufactured.
【００１５】[0015]
【発明の実施の形態】実施例として、高温金属板である
熱延薄鋼板について、その仕上圧延後の水冷装置に本発
明の装置を設置した場合について説明する。図２は、仕
上圧延機出側の高温金属板の冷却プロセスを模式的に表
した図である。図２において、熱延鋼板（高温金属板）
１は、仕上圧延機２にて圧延された後、複数の冷却ヘッ
ダ群からなる水冷装置３を鋼板の上下双方に配した冷却
装置内を通り、巻取り機４にて巻取られる。図２の水冷
装置３は冷却水を供給するノズルを鋼板幅方向に並べて
構成されるヘッダが、複数、鋼板搬送方向に数十ｃｍの
間隔で平行に配設されている。冷却水供給の開始および
停止は、ヘッダの根元にあるバルブの開閉によって行
う。ちなみに、熱延鋼板の冷却装置は非常に多くのヘッ
ダが配設されているので、各ヘッダの根元にバルブを設
けると設備コストが非常に高くなるので、一般にはフィ
ードバック制御などで用いる一部のゾーンを除き複数の
ヘッダをひとまとめにして１つのバルブを開閉制御して
いる。熱延鋼板の搬送中、水冷装置３では、１個または
複数個の電磁弁５によってオーバーヘッドタンク６から
の給水が開閉制御される。各水冷装置間の搬送ラインの
側方には、噴射装置１０が設置されており、給水槽１３
から取水し、ポンプ１１によって加圧された噴射水が、
配管１２を経て供給される。スプレーノズルからの噴射
は電磁弁１５の開閉制御によって行われる。なお、電磁
弁５、１５の開閉指令は演算装置７によって出力されて
いる。図２はスプレーが３ケ所ある場合を示したが、本
発明はこれに限られるものではない。BEST MODE FOR CARRYING OUT THE INVENTION As an example, a case will be described where a hot-rolled thin steel sheet as a high-temperature metal sheet is installed in a water-cooling apparatus after finish rolling. FIG. 2 is a diagram schematically illustrating a cooling process of the high-temperature metal plate on the exit side of the finishing mill. In FIG. 2, a hot-rolled steel sheet (high-temperature metal sheet)
1 is rolled by a finishing mill 2, then passed through a cooling device in which water cooling devices 3 each composed of a plurality of cooling header groups are arranged on both the upper and lower sides of a steel sheet, and are wound by a winder 4. The water cooling device 3 shown in FIG. 2 has a plurality of headers configured by arranging nozzles for supplying the cooling water in the width direction of the steel plate, and is arranged in parallel at an interval of several tens cm in the conveyance direction of the steel plate. The start and stop of the cooling water supply are performed by opening and closing a valve at the root of the header. By the way, the cooling device for hot rolled steel sheets has a very large number of headers, so if valves are provided at the root of each header, the equipment cost will be very high. Except for the zone, a plurality of headers are collectively controlled to open and close one valve. During the transportation of the hot-rolled steel sheet, in the water cooling device 3, the supply of water from the overhead tank 6 is controlled to be opened and closed by one or a plurality of solenoid valves 5. An injection device 10 is provided on the side of the transport line between the water cooling devices, and a water supply tank 13 is provided.
, And the jet water pressurized by the pump 11 is
It is supplied via a pipe 12. Injection from the spray nozzle is performed by controlling the opening and closing of the solenoid valve 15. The opening / closing command for the solenoid valves 5 and 15 is output by the arithmetic unit 7. FIG. 2 shows a case where there are three sprays, but the present invention is not limited to this.
【００１６】図１は、本発明装置の実施例の構成を表し
た図である。図１において、鋼板１は多数平行に配列さ
れたテーブルローラ２０の上を搬送される。噴射装置１
０には３個のスプレーノズル１０ａ，１０ｂ，１０ｃが
設けられている。図１では同じ位置に噴射角度を少しず
つ変えた３個のスプレーノズルを示しているが、滞留水
を手前から順に側方へ押し寄せる効果がある。なお、同
じ位置に複数のスプレーノズルを設置することは、異な
る幅の鋼板を製造する場合にも有効である。各ノズルは
それぞれ図３、４および表１に示すように、水平面上で
鋼板の搬送方向３１に対してなす角αが１００〜１１０
°、水平面に対し下向きになす角βが３０〜４５°の角
度をなして設置されている。噴射装置１０の設置位置よ
り鋼板搬送方向上流が水冷ゾーン、下流が空冷ゾーンで
ある場合に限り、ノズル１０ａ，１０ｂ，１０ｃから高
圧水が噴射される。図１中の実線の矢印２４は高圧水の
噴射方向を、点線の矢印２５は高圧水が鋼板上面に当た
った後に、上流側から流れ込んでくる滞留冷却水２６を
巻き込んで流れていく方向を表わしている。図３、図４
は高圧水の噴射方向をそれぞれ水平面、垂直面に投影し
たベクトル３２、３６の説明図である。高圧水の噴射角
度を、図３に示したように、水平面上で鋼板搬送方向３
１に対しα＝９０°以上とし、さらに図４に示すよう
に、鉛直面３４内において水平方向３５に対し下向きに
β＝０°以上とした。高圧水は確実に鋼板１の上面に当
たり、その後の流れは上流から搬送されてくる滞留冷却
水２６をせき止め、これを巻き込んで側方に押し寄せる
ことができた。３個のノズル１０ａ，１０ｂ，１ｃの噴
射角度を表１に示すように少しずつ変えたから、滞留冷
却水は図２に示すように手前から順に側方に押し寄せら
れ、鋼板上面から完全に排除された。FIG. 1 is a diagram showing the configuration of an embodiment of the apparatus of the present invention. In FIG. 1, a steel plate 1 is conveyed on a plurality of table rollers 20 arranged in parallel. Injection device 1
0 is provided with three spray nozzles 10a, 10b, 10c. FIG. 1 shows three spray nozzles in which the spray angle is slightly changed at the same position, but has an effect of sequentially pushing the staying water to the side from the near side. Note that installing a plurality of spray nozzles at the same position is also effective when manufacturing steel plates having different widths. As shown in FIGS. 3 and 4 and Table 1, each nozzle has an angle α of 100 to 110 with respect to the transport direction 31 of the steel sheet on the horizontal plane.
°, an angle β formed downward with respect to the horizontal plane is set at an angle of 30 to 45 °. High-pressure water is injected from the nozzles 10a, 10b, 10c only when the upstream of the installation position of the injection device 10 in the steel sheet transport direction is a water cooling zone and the downstream is an air cooling zone. In FIG. 1, a solid arrow 24 indicates a direction in which the high-pressure water is sprayed, and a dotted arrow 25 indicates a direction in which the high-pressure water impinges on the accumulated cooling water 26 flowing from the upstream side and then flows. ing. 3 and 4
FIG. 3 is an explanatory diagram of vectors 32 and 36 in which the injection direction of high-pressure water is projected on a horizontal plane and a vertical plane, respectively. As shown in FIG. 3, the spray angle of the high-pressure water is set to 3
4, α is set to 90 ° or more, and further, as shown in FIG. The high-pressure water surely hit the upper surface of the steel sheet 1, and the subsequent flow damped the stagnant cooling water 26 conveyed from the upstream, and was able to get involved and push it to the side. Since the injection angles of the three nozzles 10a, 10b, and 1c were changed little by little as shown in Table 1, the accumulated cooling water was pushed sideways in order from the front as shown in FIG. 2 and completely removed from the upper surface of the steel plate. Was.
【００１７】鋼板上面から排除された水は排出口２７に
流れ込んで排水除去してしまうから、従来のように高圧
の噴射水がガイドに跳ね返って再び鋼板上面にのってし
まうということがなくなった。排出口２７はスプレーの
噴射方向の延長線上で搬送ラインのガイド２２を一部切
り欠いて設置したものである。従来は、先端通板時に鋼
板が蛇行して搬送ラインから飛び出すおそれがあったか
ら、ガイドに切欠き部を設けるようなことはしなかっ
た。本発明装置では、排出口２７のすぐ上流側に鋼板搬
送方向と１５°の角度をなす案内板２３を設置したか
ら、鋼板が蛇行してもその先端は案内板２３に当たって
進行方向が修正され、鋼板１が排出口２７に突っ込みト
ラブルを起すようなことはない。Since the water removed from the upper surface of the steel plate flows into the discharge port 27 and is drained and removed, it is no longer necessary that the high-pressure jet water rebounds on the guide and gets on the upper surface of the steel plate again. . The discharge port 27 is provided by partially cutting out the guide 22 of the transport line on an extension of the spraying direction of the spray. Conventionally, there has been a risk that the steel sheet may meander and jump out of the transport line when the leading edge is passed, so that a notch is not provided in the guide. In the apparatus of the present invention, since the guide plate 23 that forms an angle of 15 ° with the steel plate transport direction is installed immediately upstream of the discharge port 27, even if the steel plate meanders, its tip hits the guide plate 23 and the traveling direction is corrected, The steel plate 1 does not plunge into the discharge port 27 to cause a trouble.
【００１８】なお、本発明の実施例では高圧水を噴射す
るスプレーノズル１０ａ，１０ｂ，１０ｃの３個を配列
した噴射装置１０を示したが、ノズルの個数を限定する
ものではない。本発明はスプレーの噴射方向の延長線上
に排出口２７があればよく、排出口２７を設置しても先
端通板性を損なわないようにするために、案内板２３を
配設した場合を示したが、案内板２３は必ずしも必要で
はない。例えば、排出口２７にもガイドを設け、この部
分を開閉式とし、先端通過時にこれを閉じ、それ以外の
時にこれを開くこととしてもよい。In the embodiment of the present invention, the spray device 10 in which three spray nozzles 10a, 10b and 10c for spraying high-pressure water are arranged is shown, but the number of nozzles is not limited. The present invention shows a case where the guide plate 23 is provided so that the outlet 27 only needs to be on the extension of the spraying direction of the spray, and even if the outlet 27 is provided, the leading end passing property is not impaired. However, the guide plate 23 is not always necessary. For example, a guide may be provided in the discharge port 27, and this portion may be opened and closed, and may be closed when the front end passes, and may be opened at other times.
【００１９】本発明の実施例のスプレーの圧力は１０ｋ
ｇｆ／ｃｍ2 を使用したが、必要なのは圧力ではなく
て、滞留水を反対側へ押し寄せるために側方から当てる
水の運動量であり、低圧でも噴射流量を多くすればよ
い。以上のように、本発明装置によって、水冷中に鋼板
上面に滞留していた冷却水を冷却ゾーン通過後に速やか
に排除することができたので、巻取り温度の制御性を飛
躍的に向上させることができた。これによって、製品の
機械的強度などの性質にむらがなくなり、高品質な製品
を製造することができるようになった。The spray pressure in the embodiment of the present invention is 10 k.
Although gf / cm 2 was used, what is needed is not the pressure but the momentum of water applied from the side to push the stagnant water to the opposite side. It is sufficient to increase the injection flow rate even at a low pressure. As described above, the cooling water staying on the upper surface of the steel plate during water cooling can be quickly removed after passing through the cooling zone by the apparatus of the present invention, so that the controllability of the winding temperature can be significantly improved. Was completed. As a result, the properties such as the mechanical strength of the product are not uneven, and a high-quality product can be manufactured.
【００２０】以上の実施例では、熱延薄鋼板の仕上圧延
後の水冷装置の場合について示したが、本発明は搬送中
の高温金属板を冷却する装置であればよく、熱延薄鋼板
の冷却装置に限るものではない。例えば、本実施例と同
様な装置を、熱延厚鋼板の圧延後の水冷装置に設置して
もよいし、アルミニウムなど他の金属板の製造プロセス
においても冷却装置が必要であれば、それが熱間圧延後
のプロセスでない他のプロセスであっても用いることが
できる。In the above embodiment, the case of the water-cooling device after the finish rolling of the hot-rolled thin steel plate is described. However, the present invention may be any device that cools the high-temperature metal plate being conveyed. It is not limited to a cooling device. For example, a device similar to that of the present embodiment may be installed in a water cooling device after rolling of a hot-rolled thick steel plate, or if a cooling device is required in a manufacturing process of another metal plate such as aluminum, it may be installed. Other processes other than the process after hot rolling can be used.
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【発明の効果】搬送速度を１０００ｍｐｍ、巻取り温度
の目標を５００℃として、５０ｋｇｆ／ｍｍ2 の強度を
もつ板厚３．２ｍｍの鋼板を製造する場合を例にとり、
鋼板の長手方向の巻取り温度及び材質のばらつきを比較
すると、従来のように滞留水を排除する排出口がない場
合、巻取り温度は全長について、５００±４５℃の範囲
でばらついており、得られた材質（強度）は５０±４．
５ｋｇｆ／ｍｍ2 の範囲内でばらついていた。According to the present invention, a 3.2 mm-thick steel sheet having a strength of 50 kgf / mm 2 is manufactured by setting the conveying speed to 1000 mpm and the target of the winding temperature to 500 ° C.
Comparing the winding temperature and the material variation in the longitudinal direction of the steel sheet, if there is no outlet to remove the stagnant water as in the conventional case, the winding temperature varies over the entire length in the range of 500 ± 45 ° C. The material (strength) provided is 50 ± 4.
It varied within a range of 5 kgf / mm 2 .
【００２３】これに対し、本発明の高圧水噴射ノズルを
備え、滞留水を排除するの排出口を設けた場合、巻取り
温度は全長について、５００±２５℃の範囲内におさめ
ることができ、得られた材質（強度）は５０±２．５ｋ
ｇｆ／ｍｍ2 の範囲内に収まり、より品質の高い製品を
製造することが可能となった。On the other hand, when the high-pressure water injection nozzle of the present invention is provided and a discharge port for eliminating the retained water is provided, the winding temperature can be kept within the range of 500 ± 25 ° C. over the entire length. The obtained material (strength) is 50 ± 2.5k
It was within the range of gf / mm 2 , and it was possible to manufacture a higher quality product.
【図面の簡単な説明】[Brief description of the drawings]
【図１】実施例の構成を示す斜視図である。FIG. 1 is a perspective view illustrating a configuration of an embodiment.
【図２】鋼板の冷却プロセスの模式系統図である。FIG. 2 is a schematic system diagram of a steel plate cooling process.
【図３】噴射高圧水のベクトルの水平面への投影を示す
説明図である。FIG. 3 is an explanatory diagram showing projection of a vector of injected high-pressure water onto a horizontal plane.
【図４】噴射高圧水のベクトルの垂直面への投影を示す
説明図である。FIG. 4 is an explanatory diagram showing projection of a vector of injected high-pressure water onto a vertical plane.
１ 高温金属板（鋼板） ２ 仕上圧延機 ３ 水冷装置 ４ 巻取り機 ５ 電磁弁 ６ オーバーヘッドタンク ７ 演算装置 １０ 噴射装置 １０ａ，１０ｂ，１０ｃ スプレーノズル １１ ポンプ １２ 配管 １３ 給水槽 １５ 電磁弁 ２０ テーブルローラ ２１ 搬送方向 ２２ ガイド ２３ 案内板 ２４，２５ 矢印 ２６ 滞留冷却水 ２７ 排出口 ３１、３３ 搬送方向 ３２ 水平面への投影ベクトル ３４ 鉛直面 ３５ 水平方向 ３６ 鉛直面への投影ベクトル DESCRIPTION OF SYMBOLS 1 High temperature metal plate (steel plate) 2 Finishing rolling mill 3 Water cooling device 4 Winding machine 5 Solenoid valve 6 Overhead tank 7 Computing device 10 Injection device 10a, 10b, 10c Spray nozzle 11 Pump 12 Piping 13 Water tank 15 Solenoid valve 20 Table roller 21 Transport direction 22 Guide 23 Guide plate 24, 25 Arrow 26 Retained cooling water 27 Outlet 31, 33 Transport direction 32 Projection vector on horizontal plane 34 Vertical plane 35 Horizontal direction 36 Projection vector on vertical plane
Claims (2)
て、上面冷却水を供給した直後に、金属板搬送ラインの
一方の側方斜め上方から他方の側方に向けて金属板の上
面に水を噴射し、金属板上面に滞留する冷却水を金属板
搬送ラインの他方の側方に排水除去することを特徴とす
る高温金属板の冷却方法。In a method for cooling a high-temperature metal plate during transportation, immediately after supplying top surface cooling water, water is applied to the upper surface of the metal plate from one side obliquely above the metal plate conveyance line to the other side. And cooling water remaining on the upper surface of the metal plate is drained and removed to the other side of the metal plate transport line.
いて、高温金属板の上面に冷却水を供給する冷却水供給
手段と該手段の直後に配設され水平面内で高温金属板の
搬送方向に対して９０°以上、鉛直面内で水平線に対し
て下向きに０°以上の角度をなす方向に金属板上に水を
噴射する噴射装置と、金属板搬送ラインの側方の噴射方
向の延長線上に冷却水及び噴射水を排出する排出手段と
を備えたことを特徴とする高温金属板の冷却装置。2. An apparatus for cooling a hot metal plate being conveyed, comprising: a cooling water supply means for supplying cooling water to an upper surface of the hot metal plate; and a conveying direction of the hot metal plate in a horizontal plane disposed immediately after the means. And a spraying device that sprays water onto the metal plate in a direction that makes an angle of 0 ° or more downward with respect to the horizontal line in the vertical plane at 90 ° or more, and an extension of the lateral spraying direction of the metal plate transport line A cooling device for a high-temperature metal plate, comprising: a discharge means for discharging cooling water and jet water on a line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19921496A JP3644140B2 (en) | 1996-07-29 | 1996-07-29 | High temperature metal plate cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19921496A JP3644140B2 (en) | 1996-07-29 | 1996-07-29 | High temperature metal plate cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1034226A true JPH1034226A (en) | 1998-02-10 |
| JP3644140B2 JP3644140B2 (en) | 2005-04-27 |
Family
ID=16404040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19921496A Expired - Fee Related JP3644140B2 (en) | 1996-07-29 | 1996-07-29 | High temperature metal plate cooling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3644140B2 (en) |
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|---|---|---|---|---|
| KR20010008943A (en) * | 1999-07-06 | 2001-02-05 | 이구택 | Equipment for the elimination of the remaining coolant by the upper impingement liquid jet with V+I type |
| KR100805013B1 (en) * | 2001-12-19 | 2008-02-20 | 주식회사 포스코 | Apparatus for removing cooling water remained on a strip |
| JP2008221298A (en) * | 2007-03-14 | 2008-09-25 | Jfe Steel Kk | Cooling facility for hot-rolled steel strip |
| CN100430163C (en) * | 2006-09-30 | 2008-11-05 | 南京钢铁股份有限公司 | Laminated flowing cooling water side-jetting sweeping system after high-strength low-alloy steel being rolled |
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|---|---|---|---|---|
| KR20010008943A (en) * | 1999-07-06 | 2001-02-05 | 이구택 | Equipment for the elimination of the remaining coolant by the upper impingement liquid jet with V+I type |
| KR100805013B1 (en) * | 2001-12-19 | 2008-02-20 | 주식회사 포스코 | Apparatus for removing cooling water remained on a strip |
| KR100916084B1 (en) * | 2002-11-06 | 2009-09-08 | 주식회사 포스코 | Dewatering apparatus comprising squeezing roll mounted on rotary housing |
| CN100430163C (en) * | 2006-09-30 | 2008-11-05 | 南京钢铁股份有限公司 | Laminated flowing cooling water side-jetting sweeping system after high-strength low-alloy steel being rolled |
| JP2008221298A (en) * | 2007-03-14 | 2008-09-25 | Jfe Steel Kk | Cooling facility for hot-rolled steel strip |
| KR101175782B1 (en) * | 2009-10-29 | 2012-08-21 | 현대제철 주식회사 | Cooling device for run out table |
| KR101204840B1 (en) * | 2010-07-29 | 2012-11-26 | 현대제철 주식회사 | Cooling device for run out table |
| KR101204841B1 (en) * | 2010-07-29 | 2012-11-26 | 현대제철 주식회사 | Cooling device for run out table |
| JP2012218026A (en) * | 2011-04-08 | 2012-11-12 | Jp Steel Plantech Co | Roller leveler and leveling roller unit used for the same |
| KR101366495B1 (en) * | 2011-04-08 | 2014-02-24 | 스틸플랜테크가부시키가이샤 | Roller leveler and leveling roll therefor |
| WO2016006402A1 (en) * | 2014-07-10 | 2016-01-14 | 新日鐵住金株式会社 | Water deflecting device and water deflecting method for steel plate cooling water in hot rolling step |
| JPWO2016006402A1 (en) * | 2014-07-10 | 2017-04-27 | 新日鐵住金株式会社 | Draining apparatus and draining method for steel sheet cooling water in hot rolling process |
| US20170136512A1 (en) * | 2014-07-10 | 2017-05-18 | Nippon Steel & Sumitomo Metal Corporation | Water removing apparatus and water removing method for steel sheet cooling water in hot rolling process |
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| US10512958B2 (en) | 2014-07-10 | 2019-12-24 | Nippon Steel Corporation | Water removing apparatus and water removing method for steel sheet cooling water in hot rolling process |
| CN110314945A (en) * | 2018-03-30 | 2019-10-11 | 宝山钢铁股份有限公司 | A kind of side spray method of hot-strip roller repairing |
| CN110314945B (en) * | 2018-03-30 | 2020-12-22 | 宝山钢铁股份有限公司 | Side spraying method for cooling hot rolled strip after rolling |
| EP3778047A4 (en) * | 2018-03-30 | 2021-06-30 | Baoshan Iron & Steel Co., Ltd. | Side spray method for cooling after rolling of hot-rolled strip steel |
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|---|---|
| JP3644140B2 (en) | 2005-04-27 |
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