JPS5861236A - Cooler in continuous heat treating installation for steel strip - Google Patents

Cooler in continuous heat treating installation for steel strip

Info

Publication number
JPS5861236A
JPS5861236A JP15810681A JP15810681A JPS5861236A JP S5861236 A JPS5861236 A JP S5861236A JP 15810681 A JP15810681 A JP 15810681A JP 15810681 A JP15810681 A JP 15810681A JP S5861236 A JPS5861236 A JP S5861236A
Authority
JP
Japan
Prior art keywords
cooling
nozzles
nozzle
gas
water
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.)
Pending
Application number
JP15810681A
Other languages
Japanese (ja)
Inventor
Toshihiro Okochi
大河内 敏博
Kojiro Oikawa
及川 耕二郎
Yasuhiro Akita
秋田 靖博
Tetsuo Ohara
大原 哲夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP15810681A priority Critical patent/JPS5861236A/en
Publication of JPS5861236A publication Critical patent/JPS5861236A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54Furnaces for treating strips or wire
    • C21D9/56Continuous furnaces for strip or wire
    • C21D9/573Continuous furnaces for strip or wire with cooling

Landscapes

  • 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 Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

PURPOSE:To permit uniform and stable cooling of steel strips by providing liquid spray nozzles having prescribed spreading angles for spraying at prescribed angles with respect to gas ejecting nozzles which open spacially. CONSTITUTION:A titled device 8 consisting of gas ejecting nozzles 11 which open spacially and liquid spray nozzles 13 which are provided in the positions above or below the nozzles 11. Said nozzles 13 are disposed at 40-80 spreading angles for right and left liquid sprays and with inclination at 30-60 deg. in an ejection direction with respect to the plane perpendicular to the nozzles 11. By such device 8, a steel strip 6 is cooled extremely stably and efficiently.

Description

【発明の詳細な説明】 本発明は、銅帯の連続熱処理装置、特に連続焼鈍装置に
おける冷却装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous heat treatment apparatus for copper strips, particularly a cooling apparatus for a continuous annealing apparatus.

近時、自動車ボディー等に用いられる加工用冷延鋼帯の
熱処理(焼鈍)は、バッチ式焼鈍から、連続焼鈍方式に
かわりつ\あり、すでに、国内企はじめ、各国の鉄鋼メ
ーカーで採用、実用稼動している。
In recent years, the heat treatment (annealing) of cold-rolled steel strips used for car bodies, etc., has been changing from batch annealing to continuous annealing, which has already been adopted and put into practical use by steel manufacturers in both Japan and other countries. It is in operation.

この連続焼鈍設備は、概ね加熱帯、均熱帯、1次冷却帯
、過時効帯、2次冷却帯からなシ、さらに表面処理、調
質圧延等を適宜組合せた一連の構成からなっている。こ
れら各帯域においては、それぞれの目的に応した処理が
されるが、このうち1次冷却帯における処理手段として
は、いくつかの方法の提案があり、現在実用化さ、れて
いるものは、ガス冷却と、液体(水)冷却の2つに大別
される。
This continuous annealing equipment generally consists of a series of configurations including a heating zone, a soaking zone, a primary cooling zone, an overaging zone, a secondary cooling zone, and an appropriate combination of surface treatment, temper rolling, etc. In each of these zones, processing is carried out according to its own purpose, and among these, several methods have been proposed as treatment means for the primary cooling zone, and the ones currently in practical use are: There are two main types: gas cooling and liquid (water) cooling.

ガス冷却は、鋼板の冷却速度は水冷却に比して遅く、従
って所望温度まで冷却するのに冷却ラインが長くなる。
With gas cooling, the cooling rate of the steel plate is slower than with water cooling, and therefore the cooling line is longer to cool the steel plate to the desired temperature.

これに対し、水冷却は、前述した点は解決されるが、過
時効温度に再加熱する手段が必要となるほか、銅帯に変
形が起シやすい等の問題が残る。
On the other hand, although water cooling solves the above-mentioned problems, it requires a means for reheating to the overaging temperature and also leaves problems such as the copper strip being easily deformed.

本出願人は、上述した問題点を解決するため銅帯の冷却
速度を比較的大きくでき、しかも、所望の温度例えば、
後続する過時効処理温度近傍に角帯温度の冷却を制御で
きる気液混合冷却法をすでに提案した。しかし、この方
法では、単に気液混合体を銅帯に吹きつければよもとい
うものではなく、種々の解決すべき問題が残っている。
In order to solve the above-mentioned problems, the present applicant has realized that the cooling rate of the copper strip can be relatively increased, and the desired temperature, e.g.
We have already proposed a gas-liquid mixed cooling method that can control the cooling of the corner zone temperature near the subsequent overaging treatment temperature. However, with this method, it is not enough to simply spray a gas-liquid mixture onto the copper strip, and various problems remain to be solved.

本発明は上記した気液混合冷却装置における噴射手段を
改良し、竺却効率がよく、かつ銅帯の形状を損わない装
置を提供するものである。
The present invention improves the injection means in the above-mentioned gas-liquid mixing cooling device, and provides a device that has good cooling efficiency and does not damage the shape of the copper strip.

すなわち、本発明は、間隔をもって開口する気体噴出ノ
ズルと、これらの気体噴出ノズルの上部または下部位置
に設けた液体スプレーノズルよシなる冷却手段を、銅帯
進行方向には埋直交する方向に複数段設けた冷却設備に
おいて、前記液体スプレーノズルは、液体スプレーの左
右の噴霧広が多角が40〜80度になるようにすること
、かつ気体噴出ノズルに垂直な面に対して30〜60度
噴出方向に傾けて配置することf:特徴とする。
That is, the present invention provides cooling means such as gas jetting nozzles that open at intervals and liquid spray nozzles provided above or below these gas jetting nozzles, in a plurality of cooling means in a direction perpendicular to the direction in which the copper strip travels. In the cooling equipment provided in stages, the liquid spray nozzle is configured such that the left and right spray spread polygon of the liquid spray is 40 to 80 degrees, and the liquid spray is sprayed at an angle of 30 to 60 degrees with respect to a plane perpendicular to the gas jet nozzle. F: Characteristic: be arranged tilted in the direction.

以下末完#Jt−v!JK示す実施例にもとづいて説明
する。
The following is the end #Jt-v! This will be explained based on an example shown by JK.

本発明に係る冷却装置は、連続焼鈍5設備の1次冷却帯
あるいはその他の冷却帯に適用できるが、これに限定さ
れるものでなく、例えば連続亜鉛メンキ設備等のメッキ
設備にも使用できる。
The cooling device according to the present invention can be applied to the primary cooling zone or other cooling zones of continuous annealing equipment, but is not limited thereto, and can also be used, for example, to plating equipment such as continuous zinc coating equipment.

第1図は、本発明の冷却装置を連続処理ラインに設けた
場合の例を示すもので、1は冷却室を示し、該室Iは均
熱室(図示せず)からの通路2と、次工程例えば過時効
室(図示せず)への通路3と連続している。4および5
は通路2,3内に設けたハースロールであり、これを転
回点としてストリップ6を搬送している。冷却室1には
冷却装置8をストリップ6の巾方向に複数段一定間隔を
置いて設置する。
FIG. 1 shows an example in which the cooling device of the present invention is installed in a continuous processing line, where 1 indicates a cooling chamber, and the chamber I is connected to a passage 2 from a soaking chamber (not shown). It is continuous with a passage 3 to the next step, for example an overaging chamber (not shown). 4 and 5
is a hearth roll provided in the passages 2 and 3, and the strip 6 is conveyed using this as a turning point. In the cooling chamber 1, a plurality of cooling devices 8 are installed at regular intervals in the width direction of the strip 6.

第2図以下は、本発明冷却装置8の具体例を示すもので
、9はガスノズルへラダーでアシ、7ランジ10を介し
て取替え可能にガスノズル11fニ一定間隔(50〜2
50mピッチ)に取付ける。14はガスノズル11の開
口である。12は水ノズルヘッダーでアシ、ガスノズル
ヘッダー9よシ延長した支持板15に固定するか1.別
途適宜の手段で水スプレーへラダーを回動可能に取付け
てもよい。該ヘラ  ゛グー12には、ガスノズル開口
14の上部あるいは下部に水スプレーノズル13の噴出
口が位置するように、この水スプレーノズル13f、ガ
スノズル開口14に併設する。この際、水スプレーノズ
ル13については、次の条件内で設置する必要がある。
FIG. 2 and subsequent figures show a specific example of the cooling device 8 of the present invention, in which 9 is a ladder to the gas nozzle, 7 is a flange 10, and is replaceable between gas nozzles 11f at regular intervals (50 to 2
50m pitch). 14 is an opening of the gas nozzle 11. 12 is a water nozzle header and is fixed to a support plate 15 extending from the gas nozzle header 9. The rudder may be rotatably attached to the water spray by a separate appropriate means. A water spray nozzle 13f is attached to the gas nozzle opening 14 in the spatula 12 so that the spout of the water spray nozzle 13 is located above or below the gas nozzle opening 14. At this time, the water spray nozzle 13 must be installed within the following conditions.

すなわち、その設置角度(第3図α)は、ガスノズルI
IK垂直な面に対して30〜60度の範囲内テすること
、また水スプレーノズルから噴出する水スプレーの噴霧
広がシ巾は40〜80度であること、がそれである。
That is, the installation angle (Fig. 3 α) is the same as that of the gas nozzle I.
The angle is within the range of 30 to 60 degrees with respect to the plane perpendicular to the IK, and the width of the water spray ejected from the water spray nozzle is 40 to 80 degrees.

冷却室1に入るストリップ6は、再結晶温度以上に均熱
された後に適宜冷却され又は冷却されない高温状態にあ
シ、また0、1〜1.5 vmという薄いために、冷却
に対しては極めて敏感である。すなわち、冷却にむらが
あると、ストリップの形状が変化する。そのため、冷却
媒体は、ストリップ中方向の表面に間断なく均一に噴射
されなければならない。本発明における水スプレーのヘ
ッダー圧はノズルよシの噴流水が安定する0、 5〜1
.0 Kg/cdの間で選択されるが、この場合の水ス
プレーノズル13の角αは、実験の結果30〜60度の
範囲にあれば、はy均一のミスト流となり、前述した問
題点を解消できることがわかった。30度以下の狭い角
度になると噴射水とガス噴流との混合が不十分になるお
それがあシ、また60度よシ広くなるとガス噴流上方の
水が薄くなシ且つ下方が厚くなって均一なミスト流が得
られない。
The strip 6 entering the cooling chamber 1 is in a high temperature state, which may or may not be appropriately cooled after being soaked to a temperature above the recrystallization temperature, and because it is thin (0.1 to 1.5 vm), it is difficult to cool. Extremely sensitive. That is, uneven cooling causes changes in the shape of the strip. Therefore, the cooling medium must be sprayed uniformly and without interruption onto the surface of the strip. The header pressure of the water spray in the present invention is 0.5 to 1, which stabilizes the water jet from the nozzle.
.. The angle α of the water spray nozzle 13 in this case is in the range of 30 to 60 degrees as a result of experiments, resulting in a uniform mist flow and solving the above-mentioned problem. I found out that it can be resolved. If the angle is narrower than 30 degrees, there is a risk that the water injected and the gas jet will not mix sufficiently, and if the angle is wider than 60 degrees, the water above the gas jet will not be thin and will become thicker below, resulting in an uneven distribution. Unable to obtain mist flow.

第7図は本発明者らが行った適正噴霧域を得るための角
度αの選定実験の結果を示すもので、角度αが30〜6
0度の範囲内にあれば、きわめて安定した噴霧状態が得
られることがわかる。この角度範囲外では部分的に粗噴
霧域が生じ、均一なミスト流が得られ難い。
Figure 7 shows the results of an experiment conducted by the present inventors to select the angle α to obtain an appropriate spray area.
It can be seen that within the range of 0 degrees, an extremely stable spray state can be obtained. Outside this angular range, coarse spray areas occur partially and it is difficult to obtain a uniform mist flow.

本発明は、ストリングの冷却を気液混合(ミスト)の使
用に止まらず、第5図に示すように必要あれば高水量時
に水スプレーのみの場合にも選択使用が可能であり、こ
の場合に水スプレーの角αを30度以下の急峻角とすれ
゛ば、水スプレーのストリップへの到達距離が長くなシ
適切な冷却速度が得られない。このような角度範囲に操
業中に変更しようとする場合は、前記した如く水スズレ
ーヘツダーが回動するように構成すればよい。
The present invention is not limited to using a gas-liquid mixture (mist) to cool the string, but can also be selectively used when only water spray is used when the amount of water is high, as shown in Figure 5, if necessary. If the angle α of the water spray is set to a steep angle of 30 degrees or less, the reaching distance of the water spray to the strip is long and an appropriate cooling rate cannot be obtained. If it is desired to change this angle range during operation, the water volley header may be configured to rotate as described above.

ストリップ面に尚るξストを均一にするためには、第6
図に示すように水ノズル13の広がシ角度θを40〜8
0度の範囲に規定する必要がある。
In order to make the ξ strain uniform on the strip surface, the sixth
As shown in the figure, the spreading angle θ of the water nozzle 13 is set to 40 to 8.
It is necessary to specify a range of 0 degrees.

すなわち、広がシ角度θが広ぐなシ過ぎるとミスト流に
むらが生じる。従って、むらのないミスト流を得るため
には80度が限界であシ、又40度以下になると、ノズ
ル配置の間隔が短かく、設置本数が必要以上に多くなる
次め設備的に不経済である。更に・、水ノズル孔径が小
さくなることから、詰りゃすくなシ、実用的でない(通
常2〜3M以上の孔径が良いとされている)。
That is, if the spread angle θ is too wide, unevenness will occur in the mist flow. Therefore, in order to obtain an even mist flow, the limit is 80 degrees, and if the angle is less than 40 degrees, the spacing between the nozzles will be short and the number of nozzles installed will be larger than necessary, which is uneconomical in terms of equipment. It is. Furthermore, since the water nozzle hole diameter becomes small, it is difficult to clog and is not practical (usually, a hole diameter of 2 to 3 M or more is considered good).

第8図は噴霧広がシ角θを変化させた場合の噴θ 霧状態の良否を実験した結果であシ、−が20〜40度
即ち角度θが40〜80度の範囲とするのが適正噴霧域
となることを示している。この範囲以下では適正噴霧域
が狭くて実用的でなく、又この範囲を超えると粗噴霧域
が生じ均一なミスト流が得られない。
Figure 8 shows the results of an experiment to determine the quality of the spray when the spray spread angle θ was varied. This indicates that the spray area is appropriate. Below this range, the appropriate spray range is too narrow to be practical, and above this range, a coarse spray range occurs, making it impossible to obtain a uniform mist flow.

以上説明し之よ5に1本発明は連続熱処理装置の冷却を
、極めて安定し且つ効率よく達成することができる。さ
らに次のような効果がある。すなわち、水スグレーその
ものが巾をもっているので、ノズルの左右ピッチを粗く
できるためノズル数が少くなり装置製作及び整備上有利
である。
As explained above, the present invention can achieve extremely stable and efficient cooling of a continuous heat treatment apparatus. Furthermore, there are the following effects. That is, since the water sugley itself has a width, the left and right pitch of the nozzles can be made coarser, which reduces the number of nozzles, which is advantageous in terms of device manufacturing and maintenance.

又水ノズル口径を大きくできることから、詰り防止の面
でもすぐれている。さらに高水量時、通常水ノズルヘラ
・ダー圧力で0.5〜1. OKVcrA以上の場合は
水スプレー単独で、均一で安定した冷却が得られる。従
ってこの時は気体噴霧用の動力が不要となシ、省エネル
ギー的にも有利な気水冷却装置といえる。
Furthermore, since the diameter of the water nozzle can be increased, it is also excellent in preventing clogging. Furthermore, when the water flow is high, the normal water nozzle pressure is 0.5 to 1. When the temperature is above OKVcrA, uniform and stable cooling can be obtained with water spray alone. Therefore, in this case, there is no need for power for gas spraying, and it can be said that the air/water cooling device is advantageous in terms of energy saving.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係る冷却装置の構成図、第2図は同冷
却装置の正面図、第3図は同玲却ノズルの第2図ト」m
断面図、第4図は気水噴霧の一部断面状態説明図、第4
図は本発明冷却ノズルを水噴霧に適用した場合の一部断
面説明図、第6図は水スプレー、ノズルの噴出広がり角
説明図、第7図は水スズレーノズルの噴出角度αを選定
する実験結果を示す図表、第8図はノズルの広がり角度
θを選定する実験結果を示す図表である。 1・・・冷却室、2,3・・・通路、4,5・・・ノ・
−スロール、6・・・ストリップ、8・・・冷却装置、
9・・・ガスノズルヘッダー、10・・・7ランジ、1
1・・・ガスノズル、12・・・水ノズルヘッダー、1
3・・・水スプレーノズル、】4・・・ガスノズル開口
、15・・・支持板。 特許出願人 代理人 弁理士 矢 葺 知 之 (ほか1名) 第 1vJ 第3図 第5図 第4図 第6図 ^ 手続補正書(方式) 昭和57年3月23日 特許庁1長官 島 Rイ 毎 塑 殿 1、事f牛の表示 昭和56年 特 許 願第1581
06号2、開明の名称 事件との関係 出願人 住 所(居所)東京都千代田区大手町二丁目6番3号氏
 名(名称)  (665+新日本製鐵株式会社4、代
 理 人 (ほか1名) 5補正命令の日付  昭和−i7年2月4日0、補正の
対果 明@書の図面の簡単な説明の欄 7、補正の内容 (1)明細書第8頁16〜17行の「第4図は本廃明冷
却ノズルを水噴霧に適用した場合の一部断面説明図、J
を「第5図は本発明冷却ノズルを水噴霧に適用した場合
の一部断面説明図、1と訂正する。
Fig. 1 is a block diagram of the cooling device according to the present invention, Fig. 2 is a front view of the cooling device, and Fig. 3 is a diagram of the cooling nozzle.
Cross-sectional view, Figure 4 is a partial cross-sectional state explanatory diagram of air water spray, Figure 4
The figure is a partially cross-sectional explanatory diagram when the cooling nozzle of the present invention is applied to water spray, Figure 6 is a diagram illustrating the water spray and the jet spread angle of the nozzle, and Figure 7 is the experimental result for selecting the jet angle α of the water spray nozzle. FIG. 8 is a chart showing experimental results for selecting the nozzle spread angle θ. 1... Cooling room, 2, 3... Passage, 4, 5... No.
- throttle, 6... strip, 8... cooling device,
9...Gas nozzle header, 10...7 lunge, 1
1...Gas nozzle, 12...Water nozzle header, 1
3...Water spray nozzle, ]4...Gas nozzle opening, 15...Support plate. Patent Applicant Representative Patent Attorney Tomoyuki Yafuki (and 1 other person) Figure 1vJ Figure 3 Figure 5 Figure 4 Figure 6 Procedural amendment (method) March 23, 1980 Patent Office 1 Commissioner R. Shima 1. Display of Cow 1981 Patent Application No. 1581
06 No. 2, relationship with the Kaimei name case Applicant address (residence) 2-6-3 Otemachi, Chiyoda-ku, Tokyo Name (665 + Nippon Steel Corporation 4, agent (etc.) 1 person) 5. Date of amendment order February 4, 1939 0, Brief explanation of the drawings in column 7 of the statement of the results of the amendment, Contents of the amendment (1) Page 8 of the specification, lines 16-17 ``Figure 4 is a partial cross-sectional explanatory diagram when the present cooling nozzle is applied to water spray, J
``Figure 5 is a partially cross-sectional explanatory diagram when the cooling nozzle of the present invention is applied to water spray,'' is corrected to ``1''.

Claims (1)

【特許請求の範囲】[Claims] 銅帯の連続熱処理設備に設けた冷却装置において、間隔
をもって開口する気体噴出ノズルと、これらの気体噴出
ノズルの上部または下部位置に設けた液体スプレーノズ
ルからなる気液噴出ノズルを有し、前記液体スプレーノ
ズルは、液体スプレーの左右の噴霧広が多角度が40〜
80度で、かつ気体噴出ノズルに垂直な面に対して30
〜60度噴出方向に傾けて配設したことを特徴とする銅
帯の連続熱処理設備における冷却装置。
A cooling device installed in a continuous heat treatment facility for copper strips has a gas-liquid jet nozzle consisting of gas jet nozzles that open at intervals and a liquid spray nozzle installed above or below these gas jet nozzles; The spray nozzle has a multi-angle range of 40~
80 degrees and 30 degrees to the plane perpendicular to the gas jet nozzle.
1. A cooling device for continuous heat treatment equipment for copper strips, characterized in that the device is installed at an angle of ~60 degrees in the direction of ejection.
JP15810681A 1981-10-06 1981-10-06 Cooler in continuous heat treating installation for steel strip Pending JPS5861236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15810681A JPS5861236A (en) 1981-10-06 1981-10-06 Cooler in continuous heat treating installation for steel strip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15810681A JPS5861236A (en) 1981-10-06 1981-10-06 Cooler in continuous heat treating installation for steel strip

Publications (1)

Publication Number Publication Date
JPS5861236A true JPS5861236A (en) 1983-04-12

Family

ID=15664428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15810681A Pending JPS5861236A (en) 1981-10-06 1981-10-06 Cooler in continuous heat treating installation for steel strip

Country Status (1)

Country Link
JP (1) JPS5861236A (en)

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