JPH02207911A - Cooling device for hot rolled steel plate - Google Patents
Cooling device for hot rolled steel plateInfo
- Publication number
- JPH02207911A JPH02207911A JP1030672A JP3067289A JPH02207911A JP H02207911 A JPH02207911 A JP H02207911A JP 1030672 A JP1030672 A JP 1030672A JP 3067289 A JP3067289 A JP 3067289A JP H02207911 A JPH02207911 A JP H02207911A
- Authority
- JP
- Japan
- Prior art keywords
- water
- water level
- rolled steel
- pump
- steel plate
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 28
- 239000010959 steel Substances 0.000 title claims abstract description 28
- 238000001816 cooling Methods 0.000 title claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 149
- 238000002347 injection Methods 0.000 claims abstract description 26
- 239000007924 injection Substances 0.000 claims abstract description 26
- 239000000498 cooling water Substances 0.000 claims abstract description 22
- 239000008400 supply water Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000002436 steel type Substances 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、熱延後の鋼板を少ない水量で効率良く冷却す
る装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for efficiently cooling a hot-rolled steel plate using a small amount of water.
熱延された鋼板を所定の材質及び組織にするため、仕上
圧延機に続いてランアウトテーブルを配置し、このテー
ブルに送り込まれた熱延鋼板を冷却している。In order to make the hot-rolled steel sheet into a predetermined material and structure, a run-out table is disposed following the finishing rolling mill, and the hot-rolled steel sheet fed into this table is cooled.
従来は、第６図に示すように、熱延鋼板への注水流量が
短時間に増減しても、注水ノズル位置での水圧が変化せ
ず注水ノズルからの流量が一定となるように、大容量ヘ
ッドタンクを備えた冷却装置が使用されている。すなわ
ち、給水ポンプ５１によってヘッドタンク５２に給水し
、ヘッドタンク５２に収容された冷却水５３を圧力調整
弁５４で圧力調整しながら、上部注水ヘッダー５５及び
下部注水ヘッダー５６から、走行中の熱延鋼板５７に注
水する。Conventionally, as shown in Figure 6, even if the flow rate of water injected into a hot rolled steel plate increases or decreases in a short period of time, the water pressure at the water injection nozzle position does not change and the flow rate from the water injection nozzle remains constant. A cooling device with a volumetric head tank is used. That is, water is supplied to the head tank 52 by the water supply pump 51, and while the pressure of the cooling water 53 contained in the head tank 52 is adjusted by the pressure regulating valve 54, the running hot rolling is supplied from the upper water injection header 55 and the lower water injection header 56. Water is poured into the steel plate 57.
このとき、熱延鋼板５７に供給される冷却水５３の水量
は、ヘッドタンク５２に収容されている冷却水５３の静
圧と圧力調整弁５４の設定圧力とに大きく影響される。At this time, the amount of cooling water 53 supplied to the hot rolled steel sheet 57 is greatly influenced by the static pressure of the cooling water 53 contained in the head tank 52 and the set pressure of the pressure regulating valve 54.
そこで、冷却水５３の水位を一定に維持するため、溢流
管５８から冷却水５３をオーバーフローさせている。Therefore, in order to maintain the water level of the cooling water 53 constant, the cooling water 53 is caused to overflow from the overflow pipe 58.
また、特開昭５８−１９９６１２号公報では、注水フィ
フクの応答遅れ時間を逐次測定演算し、この演算結果に
基づいて注水量を制御することが提案されている。Further, Japanese Patent Laid-Open No. 199612/1983 proposes that the response delay time of the water injection process is sequentially measured and calculated, and the amount of water injection is controlled based on the results of the calculations.
しかしながら、溢流管５８から冷却水５３をオーバーフ
ローさせてヘッドタンク５２に収容された冷却水５３の
水位を一定に維持する方式では、熱延鋼板５７の冷却に
使用されずに排出される冷却水５３の量が多いため、用
水量や揚水のために消費される電力が莫大なものとなり
、熱延鋼板の製造コストを上昇させる。However, in the system in which the water level of the cooling water 53 stored in the head tank 52 is maintained constant by overflowing the cooling water 53 from the overflow pipe 58, the cooling water is discharged without being used for cooling the hot-rolled steel sheet 57. Since the amount of 53 is large, the amount of water used and the power consumed for pumping water become enormous, which increases the manufacturing cost of hot-rolled steel sheets.
また、ヘッドタンク５２と注水ヘッダー５５．５６との
間に設けた圧力調整弁５４によって注水量を制御する場
合、注水ヘッダー５５．５６毎に設備される圧力調整弁
の数が多く、弁個体間の特性のバラツキや設備保全上の
トラブルが多発し易くなる。Furthermore, when controlling the amount of water injected using the pressure regulating valve 54 provided between the head tank 52 and the water injecting header 55, 56, a large number of pressure regulating valves are installed for each water injecting header 55, 56, and Variations in characteristics and equipment maintenance problems are likely to occur frequently.
そこで、本発明は、所定量の給水を行う機構を組み込む
ことにより、溢流によって一定水位を確保する大容量ヘ
ッドタンク及び圧力調整弁を省略し、消費される水量及
び電力の節減を図り、また熱延鋼板に対する注水を高精
度で行うことを目的とする。Therefore, the present invention incorporates a mechanism for supplying a predetermined amount of water, thereby omitting the large-capacity head tank and pressure regulating valve that ensure a constant water level through overflow, thereby reducing the amount of water and electricity consumed. The purpose is to inject water into hot rolled steel sheets with high precision.
本発明の熱延鋼板冷却装置は、その目的を達成するため
に、冷却水を給水管に送り込む給水ポンプと、前記給水
管から冷却水を熱延鋼板の表面に注水する注水ヘッダー
と、該注水ヘッダーからの注水ＷＩＱｌ を時々刻々予
測すると同時に、前記給水管に連結した補助タンクの水
位を検出して基準水位との差に応じた給水管への水量Δ
Ｑ、を算出し、給水管へ合計送水、ｆｆｉ Ｑ ｊ ＝
Ｑ １＋ΔＱ、を実現するためのポンプ回転数をポンプ
特性より算出する計算機と、該計算機からの指令回転数
を実現する制御機構とを備えていることを特徴とする。In order to achieve the object, the hot rolled steel plate cooling device of the present invention includes a water supply pump that sends cooling water to a water supply pipe, a water injection header that injects cooling water from the water supply pipe onto the surface of the hot rolled steel plate, and the water injection The water injection WIQl from the header is predicted moment by moment, and at the same time, the water level of the auxiliary tank connected to the water supply pipe is detected, and the amount of water Δ to the water supply pipe is determined according to the difference from the reference water level.
Q, and the total water supply to the water pipe, ffi Q j =
The present invention is characterized by comprising a computer that calculates the pump rotation speed for realizing Q1+ΔQ from pump characteristics, and a control mechanism that realizes the command rotation speed from the computer.
本実施例においては、第１図に示すようにヘッドタンク
を備えていない給水系統としている。In this embodiment, as shown in FIG. 1, the water supply system does not include a head tank.
すなわち、冷却水ｌは、給水ポンプ２によって給水管３
に直接送り込まれる。そして、冷却水１は、この給水管
３から、熱延鋼板４の両面に対向する注水ヘッダ−５，
６に供給され、熱延鋼板４の両面に注水される。一方、
給水管３内には、注水ヘッダー５，６から熱延鋼板４に
注水される水ｍ Ｑ ｌ を、鋼種、圧延寸法、圧延速
度、仕上出側実測温度１１巻取目標温度を考慮し、注水
制御モデルを用いて計算機により時々刻々予測する。That is, the cooling water l is pumped through the water supply pipe 3 by the water supply pump 2.
sent directly to. The cooling water 1 is supplied from this water supply pipe 3 to a water injection header 5 facing both sides of the hot rolled steel plate 4,
6, and water is poured onto both sides of the hot rolled steel sheet 4. on the other hand,
Water m Q l is injected into the hot rolled steel plate 4 from the water injection headers 5 and 6 into the water supply pipe 3, taking into account the steel type, rolling dimensions, rolling speed, finishing exit side actual measured temperature 11 and the winding target temperature. A computer uses a control model to make predictions every moment.
この予測に用いる注水制御モデルは、次の関数で表され
る。すなわち、仕上出側板厚をｈ１仕上出側板温をＴ
Ｐ ａ ａ ａ、圧延速度をｖ１巻取目標温度をＴＣ，
ａｌｍ、巻取実測温度をＴｅ１ｌａい板の比熱をＣ１板
と冷却水間の熱伝達率をα、板の比熱をγとすると、水
ｉｔ Ｑ ｌ は次の式で表される。The water injection control model used for this prediction is expressed by the following function. In other words, the finished exit side plate thickness is h1 and the finished exit side plate temperature is T.
P a a a, rolling speed v1, winding target temperature TC,
When the specific heat of the plate is C1, the heat transfer coefficient between the plate and the cooling water is α, and the specific heat of the plate is γ, the water it Q l is expressed by the following formula.
ココに、ｈ Ｖ ７ Ｃ（Ｔｒｅｅｓ Ｔｃａ＋ａ）
は巻取目標温度Ｔ ｅ ａ ｉ ｍを実現するために板
の着目点が仕上出側から巻取までの間に加熱されるべき
熱量であり、ｇ （Ｔｃ−＋−Ｔｃ−−−）は、巻取目
標温度と実測巻取温度差により修正する修正項、ｇは修
正するための関数である。また、ｈ ＊ Ｖ ｒ Ｔ
Ｆａ＠Ｓ ＊ Ｔｃａａｓは時々刻々実測によって得ら
れる値であり、γは鋼種により決まる物理定数、Ｃ１α
は鋼種と温度により決まる物理定数である。Here, h V 7 C (Trees Tca+a)
is the amount of heat that should be heated between the point of interest on the board from the finishing exit side to the winding in order to achieve the target winding temperature T e a i m, and g (Tc−+−Tc−−−) is , a correction term that is corrected based on the difference between the target winding temperature and the measured winding temperature, and g is a function for correction. Also, h * V r T
Fa@S * Tcaas is a value obtained by actual measurement from time to time, γ is a physical constant determined by the steel type, and C1α
is a physical constant determined by the steel type and temperature.
第１図に戻って、給水管３の上方には水位検出用の補助
タンク７を設けており、補助タンク７内に配置した水位
計８で給水管３内の水位を検出し、検出された水位は、
基準水位との差に応じた給水管への水量ΔＱ、 とし
て算出され、前記水ＩＱ。Returning to Figure 1, an auxiliary tank 7 for water level detection is provided above the water supply pipe 3, and a water level gauge 8 placed inside the auxiliary tank 7 detects the water level within the water supply pipe 3. The water level is
The water amount ΔQ to the water supply pipe according to the difference from the reference water level is calculated as the water IQ.
との合計水量Ｑ、を実現するためのポンプ回転数を計算
機９により算出し、制御信号ｌＯに変換し、給水ポンプ
２の回転数制御機構に人力される。その結果、鋼板への
注水量が時々刻々変化しても各ノズルからの注水量が一
定となるように、給水管内の水位を一定とするよう、給
水ポンプ２の駆動が制御され、所定量の冷却水がヘッダ
ー５．６から熱延鋼板４に注水される。The computer 9 calculates the pump rotation speed to achieve the total water amount Q, and converts it into a control signal lO, which is manually input to the rotation speed control mechanism of the water supply pump 2. As a result, the drive of the water supply pump 2 is controlled to keep the water level in the water supply pipe constant, so that even if the amount of water injected into the steel plate changes from moment to moment, the amount of water injected from each nozzle remains constant. Cooling water is poured into the hot rolled steel plate 4 from the header 5.6.
第２図は前記制御機構の実施例の構成を示すブロック図
である。FIG. 2 is a block diagram showing the configuration of an embodiment of the control mechanism.
第２図において、ブロック２１は水位基準値ｈ ｒａｔ
を出力するものであり、その値はＣＴ Ｃ（Ｃｏｉｌｉ
ｎｇＴｅｍｐｅｒａｔｕｒｅ Ｃｏｎｔｒｏｌ：巻取温
度制御） コントローラから、冷却プロセスに応じた注
水流量に対応して与えられる。前記補助タンク７ （第
１図参照）内の水位りは水位計８によって測定され、水
位のフィードバック値ｈ ｒｂｋとして水位基準値ｈ
ｒ、ｔと比較され、その偏差Δｈは水位りと補助タンク
容積との関係を考慮した関数ΔＱｌ＝ｆ、（ｈ、 Δ
ｈ）によりポンプ流量ΔＱ、に換算される。In FIG. 2, block 21 represents the water level reference value h rat
The value is CT C (Coili
ngTemperature Control: Provided by the controller in accordance with the water injection flow rate according to the cooling process. The water level in the auxiliary tank 7 (see Figure 1) is measured by a water level meter 8, and a water level reference value h is determined as a water level feedback value hrbk.
r, t, and the deviation Δh is determined by a function ΔQl=f, (h, Δ
h) is converted into pump flow rate ΔQ.
さらに、ＣＴＣ機能により算出された時々刻々変化する
ヘッダー本数換算流量Ｑ、を加えた全流ＩＱ２からポン
プ特性を考慮して、ポンプ回転数指令Ｎ”ｆ２（Ｑ２）
を与える。このポンプ２は、回転数指令に基づいて、回
転数Ｎになるように制御され、結果としてほぼＱ２ に
等しい流量Ｑ３ の吐出量を得る。このポンプ流！ｔｑ
ｓ で表される水量のうち、大部分はコイル冷却流量（
ブロック２４）としてヘッダー５，６ （第１図参照）
に与えられ、残りは給水管に残留し、補助タンク７の水
位変動となって現れる。Furthermore, the pump rotation speed command N''f2 (Q2) is calculated by considering the pump characteristics from the total flow IQ2, which is calculated by adding the header number conversion flow rate Q, which changes from moment to moment, calculated by the CTC function.
give. This pump 2 is controlled to have a rotational speed N based on the rotational speed command, and as a result, a discharge amount of a flow rate Q3 approximately equal to Q2 is obtained. This pump style! tq
Of the water amount represented by s, most of it is the coil cooling flow rate (
Header 5, 6 (see Figure 1) as block 24)
The remainder remains in the water supply pipe and appears as water level fluctuations in the auxiliary tank 7.
第３図は、第２図のブロック図で示される制御系の具体
例を示すフローチャートである。ポンプ流ｍ Ｑ ｓ
とコイル冷却流量Ｑ ｏ ｕ Ｌ との差により、ある
時刻１における補助タンク７ （第１図参照）の水位Ｈ
ｔ が決まる（ブロック３１）。水位Ｈ＋ はサンプリ
ング毎に時々刻々変化しているため、前回求めた水位ｈ
ｌ−１に今回サンプリングで検出した水位Ｈ＋ を所定
のフィルタリング割合αで加え、今回の補助タンク内水
位り、とする（ブロック３２）。FIG. 3 is a flowchart showing a specific example of the control system shown in the block diagram of FIG. Pump flow m Q s
The water level H of the auxiliary tank 7 (see Figure 1) at a certain time 1 is determined by the difference between the coil cooling flow rate Q o u L and the coil cooling flow rate Q o u L
t is determined (block 31). Since the water level H+ changes from moment to moment for each sampling, the previously determined water level h
The water level H+ detected in the current sampling is added to l-1 at a predetermined filtering rate α to obtain the current water level in the auxiliary tank (block 32).
ブロック３３では、この水位ｈｌ と基準水位り１第
２図のｈ ｒａｔに相当）との偏差ｈ” ｈｔの値の
範囲を判断する。すなわち、基準水位ｈ９ に対して、
水位り、との偏差レベルを設定し、
■ 偏差が０と＋βとの間にあるとき。In block 33, the range of the value of the deviation h" ht between this water level hl and the reference water level 1 (corresponding to h rat in FIG. 2) is determined. That is, with respect to the reference water level h9,
Set the deviation level between the water level and ■ When the deviation is between 0 and +β.
（Ｑ＜ｈ”−ｈ、≦β） ■ 偏差が＋βと＋Ｔとの間にあるとき。(Q<h”-h, ≦β) ■ When the deviation is between +β and +T.
（β＜ｈ”−ｈ、≦γ） ■ 偏差が−δと０との間にあるとき。(β<h”−h, ≦γ) ■ When the deviation is between -δ and 0.
（−δ≦ｈ” ｈｔ＜０） ■ 偏差が−εと−δとの間にあるとき。(−δ≦h” ht<0) ■ When the deviation is between -ε and -δ.
（−ε≦ｈ”−ｈｔ＜−δ）
の場合に分類する（第４図参照）
前記の■、■の場合には、現在の水位り、が目標水位の
範囲に入っているため、水位偏差流量換算値ΔＱ１
として０を与える。(−ε≦h”−ht<−δ) (see Figure 4) In the cases of ■ and ■ above, the current water level is within the range of the target water level, so the water level Deviation flow rate conversion value ΔQ1
0 is given as
■の場合には、現在水位り、が下限値「βｊ°より低い
ため、水位偏差流量換算値ΔＱ、 とじて、ΔＱ＋
＝ ｆ ＋（ｈｔ、 ｈ” ｂ＋）・・・・（第２図
のブロック２２に相当）
を加算値として与える。In the case of ■, since the current water level is lower than the lower limit value "βj°," the water level deviation flow rate conversion value ΔQ, then ΔQ+
= f + (ht, h" b+)... (corresponding to block 22 in FIG. 2) is given as the addition value.
■の場合には、現在水位り、が上限値「δ」を超えてい
るため、水位偏差流量換算値ΔＱ１ として、
ΔＱ ＋ ＝ｆ ＋ （ｈ ＋ 、ｈ ” ｈ Ｉ）
・・・・（第２図のブロック２２に相当）
を減算値として与える。In the case of ■, the current water level exceeds the upper limit "δ", so the water level deviation flow rate conversion value ΔQ1 is ΔQ + = f + (h + , h '' h I)
... (corresponding to block 22 in FIG. 2) is given as the subtraction value.
一方、ＣＴＣコントローラ３５からは、時々刻々設定さ
れる冷却プロセスの注水ヘッダー本数の値が、所定時間
間隔で出力されている。ブロック３６では、その注水出
力ヘッダーを必要注水流量Ｑ１に換算している。次に、
必要注水流Ｗｋ ｃｔ ＋ と、前記の水位偏差流量
換算ブロックで演算された水位偏差流量換算値ΔＱ１
を加算又は減算し、Ｃ＋ ＋ΔＱ１ を算出する。次
のブロック３８では与えられたポンプ流ｆｆｉ Ｑ ２
を実現するポンプ回転数Ｎをポンプ特性より求め、ポ
ンプ回転数制御ブロック３９に出力する。On the other hand, the CTC controller 35 outputs the value of the number of water injection headers for the cooling process, which is set from time to time, at predetermined time intervals. In block 36, the water injection output header is converted into the required water injection flow rate Q1. next,
Required water injection flow Wk ct + and water level deviation flow rate conversion value ΔQ1 calculated by the water level deviation flow rate conversion block
C+ +ΔQ1 is calculated by adding or subtracting . In the next block 38, the given pump flow ffi Q 2
The pump rotation speed N that achieves this is determined from the pump characteristics and output to the pump rotation speed control block 39.
以上の制御機構により、補助タンク７の水位を一定とす
るよう、給水ポンプ２の駆動が制御され、所定量の冷却
水１がヘッダー５．６から熱延鋼板４に給水される。The above control mechanism controls the driving of the water supply pump 2 so as to keep the water level in the auxiliary tank 7 constant, and a predetermined amount of cooling water 1 is supplied from the header 5.6 to the hot rolled steel plate 4.
なお、本実施例で使用する給水ポンプ２としては、回転
数一定時に吐出圧力の変動に対し、吐出量が大幅に増減
する特性を有するブースターポンプ等の使用が好ましい
（第５図参照）
このときには、補助タンクの水位りが基準水位より下が
ると吐出圧力が下がり、吐出量が大幅に増大するため、
補助タンク内の基準水位から下がりにくくなる。逆に、
補助タンクの水位りが基準水位より上がると吐出圧力が
上昇し、吐出量が大幅に減少するため、補助タンク内の
基準水位から上がりにくくなる。したがって、この水位
制御系は、系内に自動復元機能を有する安定な制御を実
現し易い特性を有する。As the water supply pump 2 used in this example, it is preferable to use a booster pump or the like that has the characteristic that the discharge amount increases or decreases significantly in response to fluctuations in discharge pressure when the rotation speed is constant (see Fig. 5). Sometimes, when the water level in the auxiliary tank falls below the standard water level, the discharge pressure decreases and the discharge volume increases significantly.
The water becomes difficult to drop below the standard water level in the auxiliary tank. vice versa,
When the water level in the auxiliary tank rises above the standard water level, the discharge pressure increases and the discharge amount decreases significantly, making it difficult for the water level in the auxiliary tank to rise above the standard water level. Therefore, this water level control system has characteristics that make it easy to realize stable control with an automatic restoring function within the system.
以上に説明したように、本発明においては、必要とする
水量で冷却水を熱延鋼板に注水することができ、しかも
大容量ヘッドタンクや多数の圧力調整弁を省略すること
ができる。そのため、設備構成が簡単なものとなること
は勿論、消費される水量や電力を大幅に節減することが
可能となる。As explained above, in the present invention, cooling water can be poured into a hot rolled steel sheet in the required amount, and a large capacity head tank and a large number of pressure regulating valves can be omitted. Therefore, not only the equipment configuration becomes simple, but also the amount of water and electricity consumed can be significantly reduced.
また、注水へラグ−に加わる水圧は、給水管内の基準水
位を変更することによって調整されるため、多数の圧力
調整弁を設けた場合に見られたような冷却水量のバラツ
キが発生することなく、熱延鋼板の冷却が均質に行われ
る。・このようにして、本発明によるとき、優れた材質
及び組織をもつ鋼板が製造される。In addition, the water pressure applied to the water injection lug is adjusted by changing the reference water level in the water supply pipe, so there is no variation in the amount of cooling water that would occur if multiple pressure adjustment valves were installed. , the hot-rolled steel sheet is cooled uniformly. - In this way, according to the present invention, a steel plate with excellent material quality and structure is manufactured.
第１図は本発明実施例で使用した設備の基本的な構成を
示す概略図、第２図は本発明制御機構の制御系のブロッ
ク図、第３図は制御機構の具体例のフローチャート、第
４図は補助タンクにおける基準水位と各偏差の関係を示
す説明図、第５図はブースターポンプの特性を示すグラ
フ、第６図は従来の冷却装置の構造を示す概略図である
。
１：冷却水 ２：給水ポンプ３：給水管
４：熱延鋼板
５．６：注水ヘッダー ７＝補助タンク８：水位計
９二計Ｗ、機
１０：制御信号FIG. 1 is a schematic diagram showing the basic configuration of the equipment used in the embodiment of the present invention, FIG. 2 is a block diagram of the control system of the control mechanism of the present invention, FIG. 3 is a flowchart of a specific example of the control mechanism, and FIG. FIG. 4 is an explanatory diagram showing the relationship between the reference water level in the auxiliary tank and each deviation, FIG. 5 is a graph showing the characteristics of the booster pump, and FIG. 6 is a schematic diagram showing the structure of a conventional cooling device. 1: Cooling water 2: Water supply pump 3: Water supply pipe
4: Hot rolled steel plate 5.6: Water injection header 7 = Auxiliary tank 8: Water level gauge
92 total W, machine 10: control signal
Claims (1)
管から冷却水を熱延鋼板の表面に注水する注水ヘッダー
と、該注水ヘッダーからの注水量Ｑ＿１を時々刻々予測
すると同時に、前記給水管に連結した補助タンクの水位
を検出して基準水位との差に応じた給水管への水量ΔＱ
＿１を算出し、給水管へ合計送水量Ｑ＿２＝Ｑ＿１＋Δ
Ｑ＿１を実現するためのポンプ回転数をポンプ特性より
算出する計算機と、該計算機からの指令回転数を実現す
る制御機構とを備えていることを特徴とする熱延鋼板冷
却装置。1. A water supply pump that sends cooling water to the water supply pipe, a water injection header that injects cooling water from the water supply pipe onto the surface of the hot rolled steel plate, and a water injection header that momentarily predicts the water injection amount Q_1 from the water injection header, and at the same time Detects the water level of the auxiliary tank connected to the water supply pipe and calculates the amount of water ΔQ to the water supply pipe according to the difference from the standard water level.
Calculate _1, total amount of water sent to the water pipe Q_2 = Q_1 + Δ
A hot-rolled steel sheet cooling device comprising: a computer that calculates a pump rotation speed to achieve Q_1 from pump characteristics; and a control mechanism that realizes a command rotation speed from the computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1030672A JPH02207911A (en) | 1989-02-08 | 1989-02-08 | Cooling device for hot rolled steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1030672A JPH02207911A (en) | 1989-02-08 | 1989-02-08 | Cooling device for hot rolled steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02207911A true JPH02207911A (en) | 1990-08-17 |
Family
ID=12310215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1030672A Pending JPH02207911A (en) | 1989-02-08 | 1989-02-08 | Cooling device for hot rolled steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02207911A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011218418A (en) * | 2010-04-12 | 2011-11-04 | Sumitomo Metal Ind Ltd | Method of manufacturing steel sheet using pump for driving cooling system |
| CN102397893A (en) * | 2011-11-30 | 2012-04-04 | 东北大学 | Water supply device of after-rolling cooling system |
| CN104805260A (en) * | 2015-04-10 | 2015-07-29 | 北京首钢股份有限公司 | Cooling water supply system and buffer water supply method thereof |
| CN104971947A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Method for controlling liquid level of laminar flow water tank |
| CN109365545A (en) * | 2018-10-26 | 2019-02-22 | 山西太钢不锈钢股份有限公司 | Section cooling water supply amount control system and its method |
| WO2020062620A1 (en) * | 2018-09-29 | 2020-04-02 | 北京力升高科科技有限公司 | Internal cooling system for robot |
-
1989
- 1989-02-08 JP JP1030672A patent/JPH02207911A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011218418A (en) * | 2010-04-12 | 2011-11-04 | Sumitomo Metal Ind Ltd | Method of manufacturing steel sheet using pump for driving cooling system |
| CN102397893A (en) * | 2011-11-30 | 2012-04-04 | 东北大学 | Water supply device of after-rolling cooling system |
| CN104971947A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Method for controlling liquid level of laminar flow water tank |
| CN104805260A (en) * | 2015-04-10 | 2015-07-29 | 北京首钢股份有限公司 | Cooling water supply system and buffer water supply method thereof |
| CN104805260B (en) * | 2015-04-10 | 2017-01-18 | 北京首钢股份有限公司 | Cooling water supply system and buffer water supply method thereof |
| WO2020062620A1 (en) * | 2018-09-29 | 2020-04-02 | 北京力升高科科技有限公司 | Internal cooling system for robot |
| CN109365545A (en) * | 2018-10-26 | 2019-02-22 | 山西太钢不锈钢股份有限公司 | Section cooling water supply amount control system and its method |
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