JPH035013A - Method for controlling cooling of hot rolled steel sheet - Google Patents
Method for controlling cooling of hot rolled steel sheetInfo
- Publication number
- JPH035013A JPH035013A JP14019389A JP14019389A JPH035013A JP H035013 A JPH035013 A JP H035013A JP 14019389 A JP14019389 A JP 14019389A JP 14019389 A JP14019389 A JP 14019389A JP H035013 A JPH035013 A JP H035013A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- water injection
- hot
- rolled steel
- injection control
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 80
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 50
- 239000010959 steel Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 84
- 238000002347 injection Methods 0.000 claims abstract description 69
- 239000007924 injection Substances 0.000 claims abstract description 69
- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims description 21
- 230000001351 cycling effect Effects 0.000 claims description 2
- 238000005098 hot rolling Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
- B21B37/76—Cooling control on the run-out table
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Control Of Heat Treatment Processes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、熱間仕上圧延機と巻取り機との間に設けられ
ている冷却装置による熱延鋼板の冷却制御方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for controlling cooling of a hot rolled steel plate by a cooling device provided between a hot finishing mill and a winding machine.
従来、熱間圧延工程において、仕上圧延後の熱延鋼板を
巻取り機で巻取るために行う冷却は、熱間仕上圧延機を
出た熱延鋼板の温度（以下圧延終了温度と言う）と巻取
り機に巻取る時の熱延鋼板の温度（以下巻取り温度と言
う）との間で冷却される熱延鋼板の材質面を考慮して最
適な冷却速度になるように冷却装置からの冷却水の注水
量を制御して行われている。Conventionally, in the hot rolling process, the cooling performed to wind up the hot-rolled steel plate after finishing rolling with a winding machine is based on the temperature of the hot-rolled steel plate leaving the hot finishing mill (hereinafter referred to as rolling end temperature). The temperature of the hot-rolled steel sheet when it is wound on the winding machine (hereinafter referred to as the winding temperature) and the material of the hot-rolled steel sheet that is cooled are taken into account, and the cooling rate from the cooling device is set to be optimal. This is done by controlling the amount of cooling water injected.
例えば、特開昭５３−９１００９号公報には、従来技術
として、熱間仕上圧延機と巻取り機との間に設けられて
いる冷却装置を複数の注水制御単位に分けて構成し、こ
れら複数の注水制御単位による比較的簡単な注水パター
ンからなる、主として巻取り温度のみを対象としだ熱延
鋼板の冷却制御を上げ、この従来技術に述べた注水制御
単位毎の冷却制御では、上述したような圧延終了温度か
ら巻取り温度までの冷却過程を制御する場合は、注水パ
ターンが非常に多くなり煩雑となることを指摘し、これ
を改善して、熱間仕上圧延機と巻取り機との間を複数個
の計算ゾーンに分割し、これらの計算ゾーンに１個以上
割当てられた各注水制御単位の水冷能力を算定するのに
、水冷時も常に空冷があるものと推定して必要冷却能力
からこの空冷能力を差引いて求めるようにし、且つこの
水冷能力から各計算ゾーンの必要注水制御単位数を算定
するのに、少なくとも（八）全注水制御単位に共通した
基本冷却能力すなわち基本熱流束ｑ０、（Ｂ）上流側の
注水状況による修正係数に５、 （Ｃ）各注水制御単位
固有の修正係数に２の積として求められる各水冷注水制
御単位の実水冷能力すなわち実熱流束Ｑ＋の総和から求
めるようにし、さらに各計算ゾーンにおける各注水制御
単位の冷却能力を空冷能力と水冷能力との和として求め
るようにして制御する熱延鋼板の冷却制御方法が開示さ
れている。For example, Japanese Unexamined Patent Publication No. 53-91009 discloses, as a prior art, a cooling device provided between a hot finishing rolling mill and a winding machine divided into a plurality of water injection control units. The cooling control of hot-rolled steel sheets is made by a relatively simple water injection pattern based on the water injection control unit, which mainly targets only the coiling temperature. He pointed out that when controlling the cooling process from the finishing temperature of rolling to the winding temperature, the number of water injection patterns becomes very large and complicated. To calculate the water cooling capacity of each water injection control unit assigned to one or more calculation zones by dividing the space into multiple calculation zones, calculate the required cooling capacity by assuming that air cooling is always available even during water cooling. In order to calculate the required number of water injection control units for each calculation zone from this water cooling capacity by subtracting this air cooling capacity from , (B) 5 for the correction coefficient depending on the water injection status on the upstream side, (C) From the sum of the actual water cooling capacity of each water cooling water injection control unit, that is, the actual heat flux Q+, which is obtained as the product of 2 and the correction coefficient specific to each water injection control unit. A cooling control method for a hot rolled steel sheet is disclosed in which the cooling capacity of each water injection control unit in each calculation zone is determined as the sum of the air cooling capacity and the water cooling capacity.
〔発明が解決しようとする課題］
ところで、近年は、熱延鋼板の材質面からの要請による
冷却能力の範囲が拡大すると共に温度制御精度の向上が
必要になり、設備的には注水制御単位が細かくなってき
ており、このため、上記特開昭５３−９１００９号公報
に述べられている熱延鋼板の冷却制御方法では、計算ゾ
ーン数またはゾーン内の注水制御単位が多数となること
、上流注水状況による修正係数の場合が膨大となると共
に注水制御単位が細かいためその修正係数を得ることが
困難となること等、実用上困難が多い。一方、注水制御
単位が細かくなったことにより、使用頻度が少ない注水
制御単位が生じ、この使用頻度の少ない注水制御単位の
開閉バルブおよび／またはノズルがトラブルを起こし充
分な注水制御ができなかったり、あるいは使用頻度が少
ないまま、使用頻度の多いものとの寿命の兼合いで取替
えを余儀無くされている。[Problem to be solved by the invention] In recent years, the range of cooling capacity has expanded due to the material properties of hot-rolled steel sheets, and it has become necessary to improve temperature control accuracy. For this reason, in the hot rolled steel sheet cooling control method described in JP-A-53-91009, the number of calculation zones or water injection control units within a zone is large, and the upstream water injection There are many practical difficulties, such as the number of correction coefficients depending on the situation is enormous, and the water injection control units are small, making it difficult to obtain the correction coefficients. On the other hand, as water injection control units become more detailed, there are water injection control units that are used less frequently, and problems may occur with the opening/closing valves and/or nozzles of these less frequently used water injection control units, making it impossible to perform sufficient water injection control. Or, even though they are used infrequently, they are forced to replace them due to the lifespan of frequently used items.
〔課題を解決するための手段］
本発明は、上記事情に着目してなされたものであって、
その要旨は、熱間仕上圧延機と巻取り機との間に設けら
れている冷却装置にまり熱延鋼板を冷却制御する方法で
あって、冷却装置に設けられている多数のノズルヘッダ
を１個乃至数個を一つの開閉バルブにより開・閉する注
水制御単位として構成すると共に、この注水制御単位の
複数個を１グループ単位として複数のグループ単位に構
成する一方、これらグループ単位に対し熱延綱板の材質
面から要求される冷却能力に対応する注水パターンを設
定し、この設定された注水パターンによって決められる
注水制御単位の開閉バルブを開・閉して熱延鋼板を冷却
制御すると共に、グループ単位の注水パターンのうち、
バルブが開となっている注水制御単位数が同じ注水パタ
ーンが存在する時、それらの注水パターンを定期的にサ
イクルさせて熱延鋼板を冷却制御する熱延綱板の冷却制
御方法である。[Means for Solving the Problems] The present invention has been made focusing on the above circumstances, and includes:
The gist is a method for controlling the cooling of a hot-rolled steel sheet in a cooling device installed between a hot finishing mill and a winding machine. One or several water injection control units are configured as a water injection control unit that is opened and closed by one on-off valve, and a plurality of water injection control units are configured as one group and are configured into multiple groups. A water injection pattern corresponding to the cooling capacity required from the material aspect of the steel plate is set, and the opening/closing valve of the water injection control unit determined by this set water injection pattern is opened and closed to control cooling of the hot rolled steel plate. Of the water injection patterns for each group,
This is a cooling control method for hot-rolled steel sheets, in which when there are water injection patterns with the same number of water injection control units in which valves are open, those water injection patterns are periodically cycled to control cooling of the hot-rolled steel sheet.
〔作 用］
本発明は、冷却装置に設けられている多数のノズルヘッ
ダを１個乃至数個を一つの開閉バルブにより開・閉する
注水制御単位として構成しであるので、熱延鋼板の材質
面から決定される強冷却を実現することができると共に
、熱延鋼板の温度制御精度を向上させることができる。[Function] The present invention is configured as a water injection control unit in which one or several nozzle headers provided in a cooling device are opened and closed by one opening/closing valve. In addition to being able to realize strong cooling determined from the surface, it is also possible to improve the temperature control accuracy of the hot rolled steel sheet.
さらに前記注水制御単位の複数個を１グループ単位とし
て複数のグループ単位に構成しであるので、容易にグル
ープごとの冷却能力を把握することができ、熱延鋼板の
温度制御へ反映することが可能となる。またさらに前記
グループ単位における注水パターンのうち、パルプが開
となっている注水制御単位数が同じ注水パターンが存在
する時、それらの注水パターンを定期的にサイクルさせ
て熱延鋼板を冷却制御するので、注水制御単位が平均し
て使用され、設備面での経時変化を均一化することがで
き、注水制御単位の開閉バルブおよび／またはノズルが
トラブルを起こすことが少なくなる上に、グループ単位
ごとのこれら機器の寿命が平均化されることから従来よ
りも全体の寿命が長くなる。尚、定期的にサイクルさせ
る時間は、０．５〜２４時間間隔で切換えるのが望まし
く、０．５時間より短いと熱延鋼板への冷却制御が不充
分になり、また２４時間超では、開閉バルブが設けられ
ている環境が熱間的な悪い環境であることから、開閉バ
ルブが円滑に作動しにくくなったり、冷却水中の水垢等
がノズル内にこびり付いてノズル詰まりを起こしたり、
あるいは下ノズルの場合は熱延鋼板からスケールが落下
して付着する等のトラブルが起こり易くなる。Furthermore, since the water injection control units are configured into multiple groups, it is possible to easily understand the cooling capacity of each group, and this can be reflected in the temperature control of hot rolled steel sheets. becomes. Furthermore, among the water injection patterns in the group unit, when there are water injection patterns with the same number of water injection control units in which the pulp is open, those water injection patterns are periodically cycled to control cooling of the hot rolled steel sheet. , the water injection control unit is used on average, it is possible to equalize changes over time in the equipment, and the opening/closing valve and/or nozzle of the water injection control unit is less likely to cause trouble. Since the lifespan of these devices is averaged, the overall lifespan will be longer than before. In addition, it is desirable that the period of periodic cycling be changed at intervals of 0.5 to 24 hours; if it is shorter than 0.5 hours, the cooling control to the hot rolled steel sheet will be insufficient, and if it exceeds 24 hours, the opening/closing time will be Because the environment in which the valve is installed is a hot and hostile environment, the opening/closing valve may not operate smoothly, and limescale etc. in the cooling water may become stuck inside the nozzle, causing nozzle clogging.
Alternatively, in the case of the lower nozzle, problems such as scale falling from the hot rolled steel plate and adhesion are likely to occur.
〔実 施 例］ 以下、本発明を実施例により説明する。〔Example] The present invention will be explained below with reference to Examples.
第１図は本発明の熱延鋼板の冷却制御方法に係わる熱間
仕上圧延機の出側設備を中心とした概略図である。図に
おいて、■は熱延鋼板、２は熱間仕上圧延機、３は冷却
装置、４はテーブルローラ５は巻取り機、６は熱間仕上
圧延機２の出側に設けられた温度計、７は巻取り機５の
直前に設けられた温度計を示す。また同図において、８
はヘッドタンク、９は貯水ピット、１０は給水ポンプ、
１１は主給水配管、１２はヘッドタンク８からの溢流水
を流す排水管、１３はスルースピット、１４は冷却水戻
り配管、１５はノズルヘッダ、１６は注水制御単位ごと
に設けられた開閉バルブ、１７は流量計、１８は支管、
１９は主管、２０はバルブを示し、これらによって冷却
装置３が構成されている。FIG. 1 is a schematic diagram mainly showing the exit side equipment of a hot finishing rolling mill related to the cooling control method for hot-rolled steel sheets of the present invention. In the figure, ■ is a hot rolled steel plate, 2 is a hot finishing rolling mill, 3 is a cooling device, 4 is a table roller 5 is a winding machine, 6 is a thermometer installed on the exit side of the hot finishing rolling mill 2, 7 shows a thermometer provided just before the winder 5. Also, in the same figure, 8
is the head tank, 9 is the water storage pit, 10 is the water pump,
11 is a main water supply pipe, 12 is a drain pipe through which overflow water from the head tank 8 flows, 13 is a through pit, 14 is a cooling water return pipe, 15 is a nozzle header, 16 is an on-off valve provided for each water injection control unit, 17 is a flow meter, 18 is a branch pipe,
Reference numeral 19 indicates a main pipe, and 20 indicates a valve, which constitute the cooling device 3.
熱延鋼板１は、図外の熱間圧延機により圧延され、最終
的には熱間仕上圧延機２により所定寸法に圧延される。The hot-rolled steel plate 1 is rolled by a hot rolling mill (not shown), and finally rolled into a predetermined size by a hot finishing mill 2.
この後、テーブルローラ４上を通板し、巻取り機５に巻
取られる。この間、熱延鋼板１は冷却装置３により、例
えば第２図に示すような冷却パターンで、熱間仕上圧延
機２の出側鋼板温度ＦＩＩＴから材質をつくり込む上で
要求される冷却速度ＣＲでもって巻取り温度ＣＴが得ら
れるように冷却制御される。ところで、最近はこのよう
な材質面から要求される冷却速度ＣＲおよび巻取り温度
ＣＴは従来と比べて範囲が拡大し、例えば、熱延鋼板１
の板厚４ｍｍ相当で、冷却速度ＣＲは１０〜１００’Ｃ
／ｓｅｃ、巻取り温度ＣＴは２００〜６００°Ｃとなっ
ている。Thereafter, the sheet is passed through a table roller 4 and wound up by a winding machine 5. During this time, the hot-rolled steel sheet 1 is cooled by the cooling device 3 in a cooling pattern as shown in FIG. Cooling is controlled so that the winding temperature CT is obtained. Incidentally, recently, the range of the cooling rate CR and coiling temperature CT required from the material aspect has expanded compared to the past.
The plate thickness is equivalent to 4 mm, and the cooling rate CR is 10 to 100'C.
/sec, and the winding temperature CT is 200 to 600°C.
このような状況の下で、設備的には水量密度が膨大とな
っており、これに対応させるため、給水面では第１図に
示すような冷却装置３としてヘッドタンク８を使用する
方式が採用され、また冷却制御部においては注水制御単
位が細分化され、１個乃至数個のノズルヘッダ１５を１
グループとして開閉バルブ１６を設は注水制御単位とし
ている。Under these circumstances, water density has become enormous in terms of equipment, and in order to cope with this, a system has been adopted for water supply that uses a head tank 8 as a cooling device 3, as shown in Figure 1. In addition, in the cooling control section, the water injection control unit is subdivided, and one to several nozzle headers 15 are divided into one unit.
The on-off valves 16 are set up as a group and are used as a water injection control unit.
第３図は上記注水制御単位を複数個集め、上グループＵ
１〜Ｕ７および下グループＬ１〜Ｌ７の各々７グループ
づつを例示する図で、Ｓ１〜Ｓ１３は熱間仕上圧延機２
と巻取り機５との間の計算セクションを示す。この図で
は計算セクションの長さとグループの長さとを同じ例を
示しているが、必ずしも同じにする必要はない。尚、等
ピッチに分割された計算セクション３１〜３１３を設定
するのは、熱延鋼板の冷却制御に当たり、冷却ゾーン内
における鋼板の温度降下量を予測することが必要となる
ので、この計算セクション３１〜Ｓ１３を元に鋼板温度
を予測すると同時に、鋼板の温度降下量を予測するため
である。Figure 3 shows the upper group U, which collects a plurality of the above water injection control units.
1 to U7 and lower groups L1 to L7, each of seven groups, S1 to S13 are hot finishing rolling mills 2
and the winder 5. Although this figure shows an example in which the length of the calculation section and the length of the group are the same, they do not necessarily have to be the same. The calculation sections 31 to 313 divided at equal pitches are set because it is necessary to predict the amount of temperature drop of the steel sheet in the cooling zone when controlling the cooling of the hot rolled steel sheet. This is to predict the temperature of the steel plate based on ~S13 and at the same time predict the amount of temperature drop of the steel plate.
第４図は本発明に係わる冷却制御方法を説明するための
説明図であって、第４図（ａ）は上記ノズルヘッダ１５
と開閉バルブ１６とから構成される注水制御単位の６個
を１グループとしたものの注水パターンを示すもので、
開閉バルブ１６が全て開になった注水パターン（イ）か
ら全て閉になった注水パターン（日までの７通りの注水
パターンを示す。また、第４図（ハ）は上記第４図（ａ
）に示した注水パターン（ロ）と同じ注水パターンを示
すもので、このように、グループ単位内に同じ注水パタ
ーンが存在する時、これらの注水パターンを定期的にサ
イクルさせると、ノズルへラダ１５に取付けられている
ノズル（図示せず）や開閉バルブ１６が平均して使用さ
れ、これらの経時変化を均一化することができ、且つこ
れらによるトラブルを軽減できる。FIG. 4 is an explanatory diagram for explaining the cooling control method according to the present invention, and FIG. 4(a) shows the nozzle header 15.
This shows a water injection pattern for a group of six water injection control units each consisting of an on-off valve 16 and an on-off valve 16.
Seven water injection patterns are shown, from the water injection pattern (a) in which the on-off valves 16 are all open to the water injection pattern (day) in which all the on-off valves 16 are closed.
) shows the same water injection pattern as the water injection pattern (b) shown in (b). In this way, when the same water injection pattern exists in a group unit, if these water injection patterns are periodically cycled, the rudder 15 to the nozzle The nozzles (not shown) and the on-off valves 16 attached to the tubes are used on average, so that changes over time can be made uniform and troubles caused by these can be reduced.
第５図は本発明の熱延鋼板の冷却制御方法に係わる制御
系ブロック図であって、回において、初期情報とは、鋼
種、板厚、通板速度、予測熱間仕上圧延温度、注水パタ
ーン、目標巻取り温度等の初期情報を意味する。初期設
定は、前記初期情報０
および後記する学習制御により得られた情報等に基づき
、各グループ単位毎の注水すべき制御単位を決定し、注
水指令を出す。ダイナミック制御は、実測されてくる板
厚、通板速度、熱間仕上圧延温度および巻取り温度の情
報と、後記する学習制御やフィードバック制御により得
られた情報に基づき、注水すべき制御単位をオン・オフ
制御する。学習制御は、目標巻取り温度と実測巻取り温
度とに誤差が生じた時、実測熱間仕上圧延温度、実測巻
取り温度および注水実績に基づき、計算セクションを元
にした鋼板温度予測に当たって補正する。フィードバッ
ク制御は、目標巻取り温度と実測巻取り温度とに誤差が
生じた時、巻取り機５に近い方の注水制御単位の一部を
、計算セクションを元にした鋼板温度予測にて注水する
制御単位とは独立にオン・オフ制御する。実績値収集は
、初期情報の他、鋼板の温度、学習係数等を収集貯蔵す
る。FIG. 5 is a control system block diagram related to the cooling control method for hot-rolled steel sheets of the present invention. , means initial information such as target winding temperature. In the initial setting, a control unit to be injected with water for each group is determined based on the initial information 0 and information obtained by learning control described later, and a water infusion command is issued. Dynamic control turns on the control units that should be injected with water based on the information obtained from the actually measured plate thickness, threading speed, hot finish rolling temperature, and coiling temperature, as well as information obtained through learning control and feedback control, which will be described later. - Control off. When an error occurs between the target winding temperature and the measured winding temperature, the learning control corrects the steel plate temperature prediction based on the calculation section based on the measured hot finish rolling temperature, the measured winding temperature, and the water injection record. . In the feedback control, when an error occurs between the target winding temperature and the measured winding temperature, water is injected into a part of the water injection control unit closer to the winder 5 based on the steel plate temperature prediction based on the calculation section. On/off control is performed independently of the control unit. Actual value collection collects and stores the steel plate temperature, learning coefficient, etc. in addition to initial information.
上述の熱延鋼板の冷却制御方法に係わる制御系を元に、
熱間圧延仕上温度約９００°Ｃの厚さ４ｍｍの１
鋼板（コイル長さ約７１０ｍ）を、通板速度条件；初期
６１抛／ｆｆ１ｉｎ、加速度０．１ｍ／ｓ２で、巻取り
温度６００°Ｃを目標に冷却制御を行ったところ、冷却
制御における途中の状態は第６図に示すような結果であ
って、的確な冷却制御がなされていた。尚、図において
、ＦＤＴは熱間圧延仕上温度、ＣＴＮは冷却途中の温度
、ＣＴは巻取り温度をそれぞれ示す。また熱間圧延仕上
温度が蛇行しているのは、加熱の際に生じたスキッドマ
ークである。Based on the control system related to the cooling control method for hot-rolled steel sheets mentioned above,
A 4 mm thick 1 steel plate (coil length of about 710 m) with a hot rolling finishing temperature of about 900°C was rolled at a winding temperature of 600°C under threading speed conditions of 61 strokes/ff1in initially and an acceleration of 0.1 m/s2. When cooling control was performed with this as the goal, the intermediate state of the cooling control was as shown in FIG. 6, indicating that accurate cooling control was being performed. In the figure, FDT indicates the hot rolling finishing temperature, CTN indicates the temperature during cooling, and CT indicates the winding temperature. Furthermore, the meandering of the hot rolling finishing temperature is due to skid marks generated during heating.
以上説明したように、本発明によれば、冷却装置に設け
られている多数のノズルヘッダを１個乃至数個を一つの
開閉バルブにより開・閉する注水制御単位として構成し
であるので、熱延網板の材質面から決定される強冷却を
実現することができると共に、熱延鋼板の温度制御精度
を向上させることができる。さらに前記注水制御単位の
複数個を１グループ単位として複数のグループ単位に構
成しであるので、容易にグループごとの冷却能力を把握
することができ、熱延鋼板の温度制御へ反２
映することが可能となる。またさらに前記グループ単位
における注水パターンのうち、パルプが開となっている
注水制御単位数が同じ注水パターンが存在する時、それ
らの注水パターンを定期的にサイクルさせて熱延鋼板を
冷却制御するので、注水制御単位が平均して使用され、
設備面での経時変化を均一化することができ、注水制御
単位の開閉バルブおよび／またはノズルがトラブルを起
こすことが少なくなる上に、グループ単位ごとのこれら
機器の寿命が平均化されることから従来よりも全体の寿
命が長くなる。As explained above, according to the present invention, a large number of nozzle headers provided in a cooling device are configured as a water injection control unit in which one or several nozzle headers are opened and closed by one opening/closing valve. It is possible to realize strong cooling determined from the material quality of the rolled net plate, and to improve the temperature control accuracy of the hot rolled steel plate. Furthermore, since the water injection control unit is configured into a plurality of groups, the cooling capacity of each group can be easily grasped, and this can be reflected in the temperature control of the hot-rolled steel sheet. becomes possible. Furthermore, among the water injection patterns in the group unit, when there are water injection patterns with the same number of water injection control units in which the pulp is open, those water injection patterns are periodically cycled to control cooling of the hot rolled steel sheet. , the water injection control unit is used on average,
Changes in equipment over time can be equalized, and problems with the on-off valve and/or nozzle of the water injection control unit will be less likely to occur, and the lifespan of these devices for each group will be averaged. The overall lifespan is longer than before.
第１図は本発明の熱延鋼板の冷却制御方法に係わる熱間
仕上圧延機の出側設備を中心とした概略間、第２図は鋼
板の材質面から要求される冷却パターンの何回、第３図
および第４図は本発明に係わる冷却制御方法を説明する
ための説明図、第５図は本発明の熱延鋼板の冷却制御方
法に係わる制御系ブロック図、第６図は本発明の熱延鋼
板の冷却制御方法による冷却制御状態図である。
熱間仕上圧延機
テーブルローラ
７ 温度計
ノズルヘッダ
流量計
主管
熱延鋼板 ２
冷却装置 ４
巻取り機、 ６゜
ヘッドタンク １５
開閉バルブ １７
支管 １９
バルブ
熱間仕上圧延機の出側鋼板温度
冷却速度 ＣＴ 巻取り温度冷却途中の温度
上グループ単位
下グループ単位
計算セクションFig. 1 shows a schematic diagram of the exit equipment of a hot finishing rolling mill related to the cooling control method for hot-rolled steel sheets of the present invention, and Fig. 2 shows the number of times of the cooling pattern required from the material aspect of the steel plate. 3 and 4 are explanatory diagrams for explaining the cooling control method according to the present invention, FIG. 5 is a control system block diagram related to the cooling control method for hot rolled steel sheets according to the present invention, and FIG. 6 is a diagram for explaining the cooling control method according to the present invention. FIG. 3 is a cooling control state diagram according to the cooling control method for a hot rolled steel sheet. Hot finishing mill table roller 7 Thermometer nozzle header flow meter Main pipe hot rolled steel plate 2 Cooling device 4 Winding machine, 6° head tank 15 Opening/closing valve 17 Branch pipe 19 Valve Temperature cooling rate of steel plate on exit side of hot finishing mill CT Winding temperature Temperature during cooling Upper group unit Lower group unit calculation section
Claims (1)
る冷却装置により熱延鋼板を冷却制御する方法であって
、冷却装置に設けられている多数のノズルヘッダを１個
乃至数個を一つの開閉バルブにより開・閉する注水制御
単位として構成すると共に、この注水制御単位の複数個
を１グループ単位として複数のグループ単位に構成する
一方、これらグループ単位に対し熱延鋼板の材質面から
要求される冷却能力に対応する注水パターンを設定し、
この設定された注水パターンによって決められる注水制
御単位の開閉バルブを開・閉して熱延鋼板を冷却制御す
ると共に、グループ単位の注水パターンのうち、バルブ
が開となっている注水制御単位数が同じ注水パターンが
存在する時、それらの注水パターンを定期的にサイクル
させて熱延鋼板を冷却制御することを特徴とする熱延鋼
板の冷却制御方法。(1) A method for controlling the cooling of a hot rolled steel plate using a cooling device installed between a hot finishing rolling mill and a winding machine, in which a large number of nozzle headers installed in the cooling device are Several water injection control units are configured as a water injection control unit that is opened and closed by one opening/closing valve, and a plurality of water injection control units are configured as one group and are configured into multiple groups. We set a water injection pattern that corresponds to the cooling capacity required from the material standpoint,
The hot-rolled steel sheet is cooled by opening and closing the on-off valve of the water injection control unit determined by the set water injection pattern, and the number of water injection control units whose valves are open in the water injection pattern for each group is controlled. A method for controlling cooling of a hot-rolled steel sheet, characterized in that when the same water-filling pattern exists, the cooling of the hot-rolled steel sheet is controlled by periodically cycling those water-filling patterns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14019389A JPH082461B2 (en) | 1989-05-31 | 1989-05-31 | Cooling control method for hot rolled steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14019389A JPH082461B2 (en) | 1989-05-31 | 1989-05-31 | Cooling control method for hot rolled steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH035013A true JPH035013A (en) | 1991-01-10 |
| JPH082461B2 JPH082461B2 (en) | 1996-01-17 |
Family
ID=15263076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14019389A Expired - Lifetime JPH082461B2 (en) | 1989-05-31 | 1989-05-31 | Cooling control method for hot rolled steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH082461B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013030945A1 (en) * | 2011-08-30 | 2013-03-07 | 東芝三菱電機産業システム株式会社 | Energy-saving device for rolling plant |
| TWI731809B (en) * | 2020-10-21 | 2021-06-21 | 中國鋼鐵股份有限公司 | Control method for improving coiling temperature vibration on steel bar |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5685208B2 (en) * | 2012-01-24 | 2015-03-18 | 株式会社日立製作所 | Control device for hot rolling mill for thin plate and control method for hot rolling mill for thin plate |
| CN104338758B (en) * | 2013-07-31 | 2017-07-28 | 宝山钢铁股份有限公司 | A kind of method for improving hot rolling new varieties new spec Strip Steel Coiling Temperature control accuracy |
-
1989
- 1989-05-31 JP JP14019389A patent/JPH082461B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013030945A1 (en) * | 2011-08-30 | 2013-03-07 | 東芝三菱電機産業システム株式会社 | Energy-saving device for rolling plant |
| CN103764306A (en) * | 2011-08-30 | 2014-04-30 | 东芝三菱电机产业系统株式会社 | Energy saving device for rolling equipment |
| JPWO2013030945A1 (en) * | 2011-08-30 | 2015-03-23 | 東芝三菱電機産業システム株式会社 | Energy saving equipment for rolling plant |
| CN103764306B (en) * | 2011-08-30 | 2015-12-16 | 东芝三菱电机产业系统株式会社 | Energy saving device for rolling equipment |
| US9511401B2 (en) | 2011-08-30 | 2016-12-06 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Energy-saving device for rolling plant |
| TWI731809B (en) * | 2020-10-21 | 2021-06-21 | 中國鋼鐵股份有限公司 | Control method for improving coiling temperature vibration on steel bar |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH082461B2 (en) | 1996-01-17 |
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