JP3206522B2 - Method and apparatus for draining steel sheet - Google Patents
Method and apparatus for draining steel sheetInfo
- Publication number
- JP3206522B2 JP3206522B2 JP30819997A JP30819997A JP3206522B2 JP 3206522 B2 JP3206522 B2 JP 3206522B2 JP 30819997 A JP30819997 A JP 30819997A JP 30819997 A JP30819997 A JP 30819997A JP 3206522 B2 JP3206522 B2 JP 3206522B2
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- Prior art keywords
- fluid
- steel sheet
- steel plate
- draining
- water
- Prior art date
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Description
【０００１】[0001]
【発明の属する技術分野】この発明は、熱間圧延された
高温の鋼板を水冷却するに際して、冷却される鋼板上に
滞留した冷却水を、流体の噴射で排除する水切り装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainer for cooling a hot-rolled high-temperature steel sheet with water, and removing cooling water retained on the cooled steel sheet by jetting a fluid.
【０００２】[0002]
【従来の技術】熱間圧延された高温の鋼板は、仕上圧延
機の下流側に設けられている冷却装置により冷却され
る。このような冷却装置は、鋼板の上面を冷却する冷却
装置と鋼板の下面を冷却する冷却装置とから構成されて
おり、それぞれの冷却装置は複数のバンクにより構成さ
れている。2. Description of the Related Art A hot-rolled high-temperature steel sheet is cooled by a cooling device provided downstream of a finishing mill. Such a cooling device is composed of a cooling device that cools the upper surface of the steel plate and a cooling device that cools the lower surface of the steel plate, and each cooling device is composed of a plurality of banks.
【０００３】上述した鋼板の上面を冷却する冷却装置に
は、一般にスリットラミナ−方式やスプレ−方式が採用
されている。そして、これらの冷却装置により鋼板の上
面を冷却するときには、鋼板の板面が水平状態にあるた
め、鋼板上面の冷却水は鋼板の通板方向または逆方向に
滞留水として流れ出る場合がある。[0003] As a cooling device for cooling the upper surface of the steel plate, a slit laminar system or a spray system is generally employed. When cooling the upper surface of the steel sheet by these cooling devices, the cooling water on the upper surface of the steel sheet may flow out as stagnant water in the direction of passing the steel sheet or in the opposite direction because the surface of the steel sheet is in a horizontal state.
【０００４】このような滞留水は鋼板上面を過冷却する
ため、鋼板の上下面で温度差が発生し、いわゆるＣ反り
の発生原因となる。このようなＣ反りが発生すると、プ
レスや矯正機によりＣ反りを矯正する作業が必要とな
り、製造コストが高くなる。[0004] Since such accumulated water supercools the upper surface of the steel sheet, a temperature difference occurs between the upper and lower surfaces of the steel sheet, which causes so-called C warpage. When such a C warpage occurs, an operation of correcting the C warpage by a press or a straightening machine is required, and the manufacturing cost increases.
【０００５】また、滞留水が他のバンクに流入すること
により、鋼板の冷却停止温度がばらついたり、板幅方向
の温度分布がばらつくので、鋼板の材質がばらつき品質
の低下を招く。[0005] In addition, when the accumulated water flows into another bank, the cooling stop temperature of the steel sheet varies, and the temperature distribution in the width direction of the steel sheet varies.
【０００６】このような理由から、鋼板上面の滞留水が
他のバンクに流入しないように水切りを行うこと、また
滞留水をできるだけ早く鋼板上面から排除することが重
要な課題となる。For these reasons, it is important to drain water so that the water remaining on the upper surface of the steel sheet does not flow into another bank, and to remove the water remaining from the upper surface of the steel sheet as soon as possible.
【０００７】高温の鋼板上面の滞留水の従来の水切り技
術としては、特公昭５９−１３５７３号公報に開示され
たものがある。この技術に基づく水切り方法は、上面冷
却バンクから鋼板上面に注水された冷却水が下流側に運
ばれようとするのを、鋼板の搬送ラインと直交する方向
から高圧流体を鋼板上面に噴射して、ライン外に吹き飛
ばすというものである。[0007] As a conventional draining technique for staying water on the upper surface of a high-temperature steel sheet, there is one disclosed in Japanese Patent Publication No. 59-13573. The draining method based on this technology is to inject the high-pressure fluid onto the upper surface of the steel sheet from a direction orthogonal to the steel sheet transport line so that the cooling water injected from the upper surface cooling bank to the upper surface of the steel sheet is about to be transported to the downstream side. And blow it off the line.
【０００８】また、鋼板搬送ラインの上方に配置したノ
ズルから、搬送方向上流側に向けて高圧流体を噴射し
て、滞留水をせき止める方法がある。There is also a method in which high-pressure fluid is jetted from a nozzle disposed above the steel sheet transfer line toward the upstream side in the transfer direction to dampen the retained water.
【０００９】さらには、水切りロ−ルを鋼板を挟んで搬
送ロ−ルと対応する位置に配置し、水切りロ−ルと搬送
ロ−ルとで鋼板を挟むことにより滞留水をせき止め、水
切りを行う方法もある。Further, a draining roll is arranged at a position corresponding to the transport roll with the steel plate interposed therebetween, and the steel plate is sandwiched between the drain roll and the transport roll to block the retained water and drain the water. There is also a way to do it.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら、上述し
た従来の水切り方法には、次のような問題点がある。 （１）特公昭５９−１３５７３号公報に開示された技術 厚鋼板の冷却の際のように大量の滞留水が流れてくる場
合には、滞留水の流れに打ち勝つだけの衝突圧力と運動
量が噴射する流体に要求されるが、水切り装置と鋼板と
の間の距離がある程度あるため（噴射ノズルがどのよう
なもので、どのように配置してあるからというような説
明がないと衝突圧力の低下の理由が理解できない）、流
体の衝突圧力の低下は避けられない。However, the conventional draining method described above has the following problems. (1) Technology disclosed in Japanese Patent Publication No. 59-13573 When a large amount of stagnant water flows as in the case of cooling a thick steel plate, the collision pressure and momentum enough to overcome the flow of the stagnant water are injected. Is required for the fluid to be discharged, but because there is a certain distance between the drainer and the steel plate (there is no explanation of what the injection nozzles are and how they are arranged, the collision pressure decreases. The reason for this cannot be understood), and a decrease in the collision pressure of the fluid is inevitable.
【００１１】したがって、十分な水切りを行うためには
噴射圧力を高くしなければならず、設備費が高くなる。[0011] Therefore, in order to sufficiently drain the water, the injection pressure must be increased, which increases the equipment cost.
【００１２】（２）搬送方向上流側に向けて高圧流体を
噴射する方法 噴射する流体が鋼板の板幅方向に広がる噴射ノズルを使
用しないと、鋼板全幅にわたって滞留水の流れをせき止
めることができないが、流体の噴射角度が広がる噴射ノ
ズルでは、流体の衝突圧力が低下する。(2) Method of injecting high-pressure fluid toward the upstream side in the transport direction Unless an injection nozzle is used in which the fluid to be ejected spreads in the width direction of the steel sheet, the flow of the stagnant water cannot be stopped over the entire width of the steel sheet. On the other hand, in the ejection nozzle in which the ejection angle of the fluid increases, the collision pressure of the fluid decreases.
【００１３】したがって、流体の衝突圧力を高めるため
には、噴射圧力を高くするか、噴射角度の狭い噴射ノズ
ルを多数使用する必要があり、設備費が高くなったり、
使用する流体の流量が増えて運転費が上昇する。Therefore, in order to increase the collision pressure of the fluid, it is necessary to increase the injection pressure or to use a large number of injection nozzles having a narrow injection angle, which increases the equipment cost,
The flow rate of the fluid used increases and the operating cost increases.
【００１４】（３）水切りロ−ルを使用する方法 冷却中に両板端部を上にして、または板中央部を上にし
て鋼板にＣ反りが発生した場合、鋼板に水切りロ−ルを
押しつけても、水切りロ−ルを鋼板上面に完全に押しつ
けることができず、鋼板と水切りロ−ルの間に隙間がで
きるので、滞留水がこの隙間から漏出する。(3) Method of Using a Draining Roll If a C-warp occurs in the steel sheet with both ends facing upward or the center of the sheet facing upward during cooling, a draining roll is applied to the steel sheet. Even when pressed, the drain roll cannot be completely pressed against the upper surface of the steel plate, and a gap is formed between the steel plate and the drain roll, so that accumulated water leaks from the gap.
【００１５】この発明は、従来技術の上述したような問
題点を解消するためになされたものであり、鋼板上面に
滞留する滞留水を、他の冷却ゾ−ンに流出させることな
く水切りして、鋼板上面から排除することのできる鋼板
の水切り装置を提供することを目的としている。The present invention has been made to solve the above-mentioned problems of the prior art, and drains water remaining on the upper surface of a steel sheet without flowing out to another cooling zone. It is an object of the present invention to provide a steel plate drainer that can be removed from the upper surface of a steel plate.
【００１６】[0016]
【課題を解決するための手段】 前述の課題を解決する
第一の手段は、鋼板幅方向の噴射幅が異なる２種類の流
体噴射ノズルを、噴射方向が鋼板のいずれか一方のエッ
ジ側に向くように、かつ噴射幅の広いほうの流体噴射ノ
ズルが噴射方向上流側に位置するように複数本配置し、
これら複数本の流体噴射ノズルから流体を鋼板上面に噴
射することにより、鋼板上面の滞留水を噴射した流体に
随伴させて鋼板上面の一方のエッジから他方のエッジへ
排出することを特徴とする鋼板の水切り方法である。Means for Solving the Problems A first means for solving the above-mentioned problem is to use two types of fluid ejection nozzles having different ejection widths in the steel sheet width direction so that the ejection direction is directed to one of the edge sides of the steel sheet. In this way, a plurality of fluid ejection nozzles having a larger ejection width are arranged so as to be located on the upstream side in the ejection direction,
By injecting fluid from the plurality of fluid injection nozzles onto the upper surface of the steel plate, the accumulated water on the upper surface of the steel plate is discharged from one edge of the upper surface of the steel plate to the other edge accompanying the injected fluid. This is the draining method.
【００１７】前述の課題を解決する第二の手段は、隣り
合うバンク間で、前記２種類の流体噴射ノズルの噴射方
向が異なるようにしたことを特徴とする鋼板の水切り方
法である。A second means for solving the above-mentioned problem is a method of draining a steel sheet, wherein the jet directions of the two types of fluid jet nozzles are different between adjacent banks.
【００１８】前述の課題を解決する第三の手段は、鋼板
幅方向の噴射幅が異なる２種類の流体噴射ノズルを噴射
方向が鋼板のいずれか一方のエッジ側に向くように、か
つ噴射幅の広いほうの流体噴射ノズルが噴射方向上流側
に位置するように複数本配置したことを特徴する鋼板の
水切り装置である。A third means for solving the above-mentioned problem is to use two kinds of fluid injection nozzles having different injection widths in the steel sheet width direction so that the injection direction is directed to one of the edge sides of the steel sheet, and A water draining device for a steel plate, wherein a plurality of wide fluid injection nozzles are arranged so as to be located on the upstream side in the injection direction.
【００１９】前述の課題を解決する第四の手段は、前記
流体噴射ノズルを配置した位置よりも上流側に水切りロ
−ルを設けたことを特徴とする前記第二の発明の鋼板の
水切り装置である。A fourth means for solving the above-mentioned problem is that a draining roll is provided upstream of a position where the fluid injection nozzle is arranged, wherein the draining roll for a steel sheet according to the second invention is provided. It is.
【００２０】前述の手段において、２種類の流体噴射ノ
ズルを用いたのは次の理由からである。In the above means, two types of fluid jet nozzles are used for the following reasons.
【００２１】噴射流体の鋼板への衝突断面積を小さくす
ると、単位面積当たりの流体の衝突圧力が高まり、滞留
水を水切りする能力が高まるので、鋼板の水切りに使用
する流体噴射ノズルは、できるだけ鋼板幅方向の噴射幅
の狭い流体噴射ノズルを用いるのがよい。When the cross-sectional area of the collision of the jet fluid with the steel sheet is reduced, the collision pressure of the fluid per unit area is increased, and the ability to drain the retained water is increased. It is preferable to use a fluid ejection nozzle having a narrow ejection width in the width direction.
【００２２】しかしながら、全ての流体噴射ノズルを噴
射幅の狭い流体噴射ノズルとすると、衝突面積が小さい
上に、噴射流体の噴射方向が鋼板のいずれか一方のエッ
ジ側に傾いているので、鋼板の滞留水が排出される側と
は反対側のエッジ近傍（噴射方向上流側）には、噴射流
体が当たりにくくなり、この付近に滞留する滞留水の水
切りが困難となる。However, if all the fluid ejection nozzles are fluid ejection nozzles with a small ejection width, the collision area is small, and the ejection direction of the ejection fluid is inclined to one of the edges of the steel sheet. In the vicinity of the edge opposite to the side from which the accumulated water is discharged (the upstream side in the ejection direction), the ejected fluid hardly hits, and it becomes difficult to drain the accumulated water staying in the vicinity.
【００２３】したがって、鋼板の滞留水が排出される側
とは反対側のエッジに配置した流体噴射ノズルのうち、
鋼板のエッジに対応する位置に配置した流体噴射ノズル
は、前述の噴射幅の狭い流体噴射ノズルではなくて、噴
射幅が広い流体噴射ノズルにする必要がある。したがっ
て、前述の手段においては、噴射幅が異なる２種類の流
体噴射ノズルを使用するようにしたのである。Therefore, of the fluid jet nozzles arranged on the edge of the steel plate opposite to the side from which the accumulated water is discharged,
The fluid ejection nozzle arranged at a position corresponding to the edge of the steel plate needs to be a fluid ejection nozzle having a wide ejection width instead of the above-described fluid ejection nozzle having a small ejection width. Therefore, in the above-described means, two types of fluid ejection nozzles having different ejection widths are used.
【００２４】なお、噴射幅の狭い流体噴射ノズルは、流
体が上面に当たったときの衝突面積が、ノズル出口面積
と同じであるようなストレ−トタイプの噴射ノズルが望
ましいが、噴射ノズルの鋼板幅方向の取り付け間隔の点
から、ある程度噴射幅が広がるもの、例えば噴射角度が
１５度程度以下のものでもよい。It should be noted that, for the fluid ejection nozzle having a small ejection width, a straight-type ejection nozzle is preferable in which the collision area when the fluid hits the upper surface is the same as the nozzle exit area. The jetting width may be widened to some extent from the viewpoint of the installation interval in the direction, for example, the jetting angle may be about 15 degrees or less.
【００２５】また、上記鋼板のエッジに対応する位置
は、鋼板の板幅によって変化するので、全ての板幅の鋼
板のエッジが完全に水切りされるように、上記噴射幅が
広い流体噴射ノズルは、鋼板の板幅の変動量に応じて少
なくとも１本以上配置する。Further, since the position corresponding to the edge of the steel sheet changes depending on the width of the steel sheet, the fluid injection nozzle having a wide injection width is used to completely drain the edges of the steel sheet having all the widths. At least one or more steel plates are arranged according to the amount of change in the width of the steel plate.
【００２６】また、噴射幅が広い流体噴射ノズルの噴射
角の選定は、流体噴射ノズルの取り付け高さ筒を考慮し
て行えばよい。Further, the selection of the ejection angle of the fluid ejection nozzle having a wide ejection width may be performed in consideration of the height cylinder of the fluid ejection nozzle.
【００２７】また、隣り合うバンク間で噴射方向が異な
るようにしたのは、全てのバンクで噴射方向を同じにす
ると、滞留水が排出される側の鋼板のエッジが過冷却さ
れるからである。The reason why the injection direction is different between the adjacent banks is that if the injection direction is the same in all the banks, the edge of the steel plate on the side from which the retained water is discharged is supercooled. .
【００２８】また、複数の流体噴射ノズルの上流側に水
切りロ−ルを配置すると、鋼板にＣ反りが発生していた
としても、かなりの量の滞留水を水切りロ−ルで水切り
することができ、流体噴射ノズルが配置してある方に流
れてくる滞留水の量が少なくなるので、相対的に噴射す
る流体の衝突圧力と運動量が滞留水の流れに十分に打ち
勝つだけ大きいものとなり、滞留水を効率よく水切りす
ることができる。Further, if a draining roll is arranged upstream of the plurality of fluid injection nozzles, a considerable amount of retained water can be drained by the draining roll even if the steel plate is warped in C. Since the amount of stagnant water flowing toward the side where the fluid ejection nozzle is disposed is reduced, the collision pressure and the momentum of the relatively ejected fluid become large enough to overcome the flow of the stagnant water, and Water can be drained efficiently.
【００２９】なお、流体噴射ノズルから噴射される水切
り用の流体としては、通常の水の他に圧縮空気や水と圧
縮空気の混合流体でもよい。The draining fluid ejected from the fluid ejecting nozzle may be compressed air or a mixed fluid of water and compressed air in addition to ordinary water.
【００３０】[0030]
【発明の実施の形態】以下、添付図面を参照して本発明
の実施の形態について説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００３１】図１はこの発明の第一の実施の形態の鋼板
の水切り装置の正面図である。この鋼板の水切り装置１
は、搬送ロ−ル２１によって搬送される鋼板２２の上方
かつ鋼板２２の幅方向に沿って直線的に配置され、噴射
方向が鋼板２２の一方のエッジ２２ａ側に傾いた複数本
（図１では３本）の噴射幅の狭い流体噴射ノズル（以下
狭幅噴射ノズルという）２と、これら複数本の狭幅噴射
ノズル２の噴射方向最上流側、すなわち鋼板２２の他方
のエッジ２２ｂ側に配置され、狭幅噴射ノズル２と同じ
ように噴射方向が鋼板２２の一方のエッジ２２ａ側に傾
いた複数本（図１では２本）の噴射幅の広い流体噴射ノ
ズル（以下広幅噴射ノズルという）３とから構成されて
いる。FIG. 1 is a front view of a steel plate drainer according to a first embodiment of the present invention. This steel plate drainer 1
Are arranged linearly above the steel sheet 22 conveyed by the conveying roll 21 and along the width direction of the steel sheet 22 and have a plurality of jets whose injection direction is inclined toward one edge 22a of the steel sheet 22 (in FIG. 1, (3) narrow fluid ejection nozzles (hereinafter referred to as narrow ejection nozzles) 2 and a plurality of narrow ejection nozzles 2 arranged on the most upstream side in the ejection direction, that is, on the other edge 22b side of the steel plate 22. A plurality of (two in FIG. 1) fluid ejection nozzles (hereinafter, referred to as wide ejection nozzles) 3 having an ejection direction inclined toward one edge 22a of the steel plate 22 in the same manner as the narrow ejection nozzle 2; It is composed of
【００３２】この水切り装置１で、鋼板２２の上面に滞
留する滞留水を水切りするときには、複数本の狭幅噴射
ノズル２からは、流体を鋼板２２の上面に向けて、流体
の噴射時の断面積と鋼板２２に衝突した時の流体の断面
積ができるだけ変わらないようにして噴射する。When the retained water remaining on the upper surface of the steel plate 22 is drained by the drainer 1, the fluid is directed from the plurality of narrow jet nozzles 2 toward the upper surface of the steel plate 22 to cut off the fluid when the fluid is jetted. The fluid is injected such that the area and the cross-sectional area of the fluid when the fluid collides with the steel plate 22 are not changed as much as possible.
【００３３】また、広幅噴射ノズル３からは、流体を鋼
板２２の上面に向けて、流体の噴射時の断面積よりも、
鋼板２２に衝突した時の流体の断面積が大きくなるよう
にして噴射する。From the wide jet nozzle 3, the fluid is directed toward the upper surface of the steel plate 22 so that the cross-sectional area at the time of jetting the fluid is
The fluid is jetted such that the cross-sectional area of the fluid when colliding with the steel plate 22 is increased.
【００３４】このようにして、流体を噴射することによ
り、滞留水の流れに対して大きい衝突圧力と大きい運動
量を有する流体が衝突することになり、滞留水は鋼板２
２の上面に衝突した後の流体の流れに随伴され、鋼板２
２の一方のエッジ２２ａ側に水切りされる。By injecting the fluid in this manner, the fluid having a large collision pressure and a large momentum collides with the flow of the stagnant water, and the stagnant water is applied to the steel plate 2.
2 accompanying the flow of the fluid after colliding with the upper surface of the steel plate 2
2 is drained to one edge 22a side.
【００３５】また、狭幅噴射ノズル２のみであると、鋼
板２２の他方のエッジ２２ｂ近傍は、流体の噴射角度が
鋼板２２の一方のエッジ２２ａ側に傾いているため、流
体が当たらなくて水切りされない可能性があるが、この
鋼板の水切り装置１は鋼板２２の他方のエッジ２２ｂ側
に、広幅噴射ノズル３を配置しているので、水切りが完
全な形で行われる。If only the narrow jet nozzle 2 is used, the fluid jetting angle in the vicinity of the other edge 22b of the steel plate 22 is inclined toward the one edge 22a of the steel plate 22, so that the fluid does not hit and the drainage is performed. Although it may not be performed, the draining device 1 for the steel plate has the wide jet nozzle 3 disposed on the other edge 22b side of the steel plate 22, so that the draining is completely performed.
【００３６】なお、鋼板２２の幅は図１に示すように、
最小幅Ｗmin から最大幅Ｗ maxまで変化するので、広幅
噴射ノズル３が一番外側の１本のみではカバ−できな
い、すなわち流体が鋼板２２の他方のエッジ２２ｂに当
たらない場合もあるので、その時は図１に示すように、
２本あるいはそれ以上配置する。The width of the steel plate 22 is, as shown in FIG.
Since the width W changes from the minimum width W min to the maximum width W max , the wide jet nozzle 3 cannot be covered by only the outermost one, that is, the fluid may not hit the other edge 22 b of the steel plate 22. Is as shown in FIG.
Place two or more.
【００３７】図２はこの発明の第二の実施の形態の鋼板
の水切り装置の正面図である。この水切り装置４は、第
一の実施の形態の鋼板の水切り装置１の上流側に、鋼板
２２の搬送ロ−ル２３と対応させて水切りロ−ル５を配
置したものであり、鋼板２２を搬送ロ−ル２３と水切り
ロ−ル５で挟み込んで、水切りができるようになってい
る。FIG. 2 is a front view of a steel plate drainer according to a second embodiment of the present invention. This draining device 4 has a draining roll 5 arranged upstream of the steel plate draining device 1 of the first embodiment in correspondence with the transport roll 23 of the steel plate 22. Draining can be performed by being sandwiched between the transporting roll 23 and the draining roll 5.
【００３８】この水切り装置４の場合には、鋼板２２に
Ｃ反りが発生していたとしても、かなりの量の滞留水を
水切りロ−ル５で水切りするこができ、流体噴射ノズル
２および３が配置してある下流側のバンクに流れてくる
滞留水の量が少なくなるので、噴射する流体の衝突圧力
と運動量が滞留水の流れに十分に打ち勝つだけ大きいも
のとなり、滞留水を効率よく水切りすることができる。In the case of this water draining device 4, even if the steel plate 22 is warped in C, a considerable amount of retained water can be drained by the water draining roll 5, and the fluid injection nozzles 2 and 3 can be drained. Since the amount of stagnant water flowing to the downstream bank where the is located is reduced, the collision pressure and momentum of the injected fluid are large enough to overcome the stagnant water flow, and the stagnant water is drained efficiently. can do.
【００３９】なお、水切り流体として水を使用する場合
には、図３の平面図に示すように、鋼板２２の滞留水が
排出される側のエッジ２２ａに近づくにしたがって、滞
留水と水切り水とが混合された流れ６はその流量が増加
し、鋼板２２の一方のエッジ２２ａが過冷却されがちに
なる。したがって、水切り装置を鋼板２２の搬送方向に
沿って複数配置したときには、滞留水と水切り水とが混
合された流れ６の方向が交互に変わるようにするとよ
い。In the case where water is used as the draining fluid, as shown in the plan view of FIG. Is increased, and the one edge 22a of the steel plate 22 tends to be supercooled. Therefore, when a plurality of draining devices are arranged along the transport direction of the steel plate 22, the direction of the flow 6 in which the stagnant water and the draining water are mixed may be alternately changed.
【００４０】図３は水切りロ−ル５を配置した第二の実
施の形態の鋼板の水切り装置の例であるが、第一の実施
の形態の鋼板の水切り装置においても、滞留水と水切り
水とが混合された流れ６の方向が交互に変わるようにす
るとよい。FIG. 3 shows an example of the steel plate draining device according to the second embodiment in which the draining rolls 5 are disposed. However, in the steel plate draining device according to the first embodiment, the accumulated water and the drainage water are also used. And the direction of the flow 6 in which is mixed is preferably changed alternately.
【００４１】[0041]
【実施例】１０バンクから構成され、各バンク間には搬
送ロ−ルと対応して水切りロ−ルが配置してあるスリッ
トラミナ−（各バンクにおける冷却水量２０００ｌ／ｍ
2・ｍｉｎ）による冷却装置に、水切りロ−ルを下ろし
た状態で温度８００℃、板幅４．５ｍおよび２ｍの鋼板
を通過させて冷却を行った。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A slit laminator comprising ten banks, and a draining roll is arranged between each bank in correspondence with a transport roll (a cooling water amount of 2000 l / m in each bank)
The cooling was performed by passing a steel plate having a temperature of 800 ° C., a width of 4.5 m and a width of 2 m into a cooling device for 2 min with the draining roll lowered.
【００４２】そして、第１バンクの入口（水切りロ−ル
の上流側）と第１０バンクの出口（水切りロ−ルの下流
側）に配置した本発明の水切り装置（狭幅噴射ノズル３
本、広幅噴射ノズル２本で構成）から、圧力６ｋｇ／ｃ
ｍ2 の水をノズル１本当たり８０ｌ／ｍｉｎの割合で噴
射した。The draining device of the present invention (narrow jet nozzle 3) disposed at the entrance of the first bank (upstream of the draining roll) and at the exit of the tenth bank (downstream of the draining roll).
Pressure, 6 kg / c
m 2 of water was sprayed at a rate of 80 l / min per nozzle.
【００４３】このようにして冷却した鋼板の幅方向の温
度分布を調べたところ、板幅４．５ｍおよび２ｍの鋼板
とも、板幅方向の温度差は±１０℃であり、同時に調べ
た幅方向の硬度分布についても大きな硬度差はなく、冷
却による冷却ムラは発生しなかった。When the temperature distribution in the width direction of the steel sheet cooled in this manner was examined, the temperature difference in the sheet width direction was ± 10 ° C. for both the 4.5 m and 2 m width steel sheets, No significant difference in hardness distribution was observed, and no cooling unevenness due to cooling occurred.
【００４４】なお、同じような条件で冷却し、本発明の
水切り装置を使用しなかった比較例の場合には、板幅
４．５ｍおよび２ｍの鋼板とも、板幅方向の温度差は±
１００℃であり、同時に調べた幅方向の硬度分布につい
ても、両エッジ部に硬度の高い部分が発生していた。In the case of the comparative example cooled under the same conditions and not using the draining device of the present invention, the temperature difference in the width direction of the steel sheets of 4.5 m and 2 m was ±±.
It was 100 ° C., and the hardness distribution in the width direction examined at the same time also showed high hardness portions at both edges.
【００４５】このことから、本発明の水切り装置を使用
することにより、冷却ムラを低減することができ、鋼板
の変形や材質のバラツキを無くすことができることが分
かる。From this, it can be seen that the use of the water draining device of the present invention can reduce cooling unevenness and eliminate deformation of the steel sheet and variation in the material.
【００４６】[0046]
【発明の効果】この発明により、鋼板を冷却するに際し
て、鋼板の幅方向に沿って均一に冷却することができる
ので、材質のばらつきや鋼板の変形が少なくなり、鋼板
の製品歩留が向上する。According to the present invention, when cooling a steel sheet, the steel sheet can be cooled uniformly in the width direction of the steel sheet, so that variations in the material and deformation of the steel sheet are reduced, and the product yield of the steel sheet is improved. .
【００４７】また、鋼板の変形を矯正するための作業が
低減するので、製造コストを削減することができる。Further, since the work for correcting the deformation of the steel plate is reduced, the manufacturing cost can be reduced.
【図１】この発明の第一の実施の形態の鋼板の水切り装
置の正面図である。FIG. 1 is a front view of a steel plate drainer according to a first embodiment of the present invention.
【図２】この発明の第二の実施の形態の鋼板の水切り装
置の正面図である。FIG. 2 is a front view of a steel plate drainer according to a second embodiment of the present invention.
【図３】この発明の第二の実施の形態の鋼板の水切り装
置の水切りの方向を交互に変更した場合の平面図であ
る。FIG. 3 is a plan view of a steel plate drainer according to a second embodiment of the present invention, in which the direction of drainage is alternately changed.
１ 水切り装置 ２ 狭幅噴射ノズル ３ 広幅噴射ノズル ４ 水切り装置 ５ 水切りロ−ル ６ 滞留水と水切り水とが混合された流れ DESCRIPTION OF SYMBOLS 1 Drainer 2 Narrow jetting nozzle 3 Wide jetting nozzle 4 Drainer 5 Draining roll 6 Flow which mixed residence water and draining water
───────────────────────────────────────────────────── フロントページの続き (72)発明者 平田 直人 東京都千代田区丸の内一丁目１番２号 日本鋼管株式会社内 (72)発明者 井上 義隆 東京都千代田区丸の内一丁目１番２号 日本鋼管株式会社内 (72)発明者 藤田 米章 東京都千代田区丸の内一丁目１番２号 日本鋼管株式会社内 (56)参考文献 特開 昭59−13573（ＪＰ，Ａ) 特開 昭59−16617（ＪＰ，Ａ) 特公 昭46−19774（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B21B 45/02 320 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Naoto Hirata 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Yoshitaka Inoue 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Yoneaki Fujita 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (56) References JP-A-59-13573 (JP, A) JP-A-59-16617 ( JP, A) JP-B-46-19774 (JP, B2) (58) Field surveyed (Int. Cl. 7 , DB name) B21B 45/02 320
Claims (4)
体噴射ノズルを、噴射方向が鋼板のいずれか一方のエッ
ジ側に向くように、かつ噴射幅の広いほうの流体噴射ノ
ズルが噴射方向上流側に位置するように複数本配置し、
これら複数本の流体噴射ノズルから流体を鋼板上面に噴
射することにより、鋼板上面の滞留水を噴射した流体に
随伴させて鋼板上面の一方のエッジから他方のエッジへ
排出することを特徴とする鋼板の水切り方法。1. A fluid jet nozzle having two jets having different jet widths in the steel sheet width direction, wherein the jet direction is directed to one edge side of the steel sheet, and the fluid jet nozzle having a wider jet width is jet direction. Arrange more than one so as to be located on the upstream side,
By injecting fluid from the plurality of fluid injection nozzles onto the upper surface of the steel plate, the accumulated water on the upper surface of the steel plate is discharged from one edge of the upper surface of the steel plate to the other edge accompanying the injected fluid. Draining method.
噴射ノズルの噴射方向が異なるようにしたことを特徴と
する請求項１に記載の鋼板の水切り方法。2. The method for draining a steel sheet according to claim 1, wherein the injection directions of the two types of fluid injection nozzles are different between adjacent banks.
体噴射ノズルを噴射方向が鋼板のいずれか一方のエッジ
側に向くように、かつ噴射幅の広いほうの流体噴射ノズ
ルが噴射方向上流側に位置するように複数本配置したこ
とを特徴とする鋼板の水切り装置。3. The two types of fluid injection nozzles having different injection widths in the width direction of the steel sheet, so that the injection direction is directed to one of the edge sides of the steel sheet, and the fluid injection nozzle having the wider injection width is upstream of the injection direction. A water draining device for a steel sheet, wherein a plurality of water draining devices are arranged so as to be positioned on the side.
も上流側に水切りロ−ルを設けたことを特徴とする請求
項３に記載の鋼板の水切り装置。4. The steel plate draining device according to claim 3, wherein a draining roll is provided upstream of a position where the fluid injection nozzle is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30819997A JP3206522B2 (en) | 1997-11-11 | 1997-11-11 | Method and apparatus for draining steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30819997A JP3206522B2 (en) | 1997-11-11 | 1997-11-11 | Method and apparatus for draining steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11138207A JPH11138207A (en) | 1999-05-25 |
| JP3206522B2 true JP3206522B2 (en) | 2001-09-10 |
Family
ID=17978119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30819997A Expired - Fee Related JP3206522B2 (en) | 1997-11-11 | 1997-11-11 | Method and apparatus for draining steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3206522B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4544234B2 (en) * | 2005-11-11 | 2010-09-15 | Ｊｆｅスチール株式会社 | Apparatus and method for cooling hot-rolled steel strip |
| CN101300089B (en) | 2005-11-11 | 2012-05-02 | 杰富意钢铁株式会社 | Cooling device and cooling method for hot-rolled steel strip |
| CA2644514C (en) | 2006-03-03 | 2012-01-17 | Jfe Steel Corporation | Hot-strip cooling device and cooling method |
| EP2697004B1 (en) * | 2011-03-18 | 2017-05-03 | Novelis, Inc. | Method and apparatus for removing coolant liquid from moving metal strip |
-
1997
- 1997-11-11 JP JP30819997A patent/JP3206522B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11138207A (en) | 1999-05-25 |
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