JPS6320417A - Cooling method for hot rolled coil - Google Patents

Abstract

PURPOSE:To improve cooling efficiency and stock yard efficiency and to uniformize cooling by injecting cooling water upward from respective nozzles on both sides of coil receiving base facing the end faces of coils stacked in the and two stages in a down end state. CONSTITUTION:The many coil receiving bases 2 which are formed with many approximately V-shaped grooves 2A atop the same are spaced from each other and are installed onto a floor surface 1A of an outdoor hot coil yard 1. The hot rolled coils C1 are imposed in the down end state into the grooves 2A and are stacked in one stage. The hot rolled coils C2 are further disposed between the adjacent coils C1 stacked in one stage so that the coils are stacked in two stages. A 1st stage of pipings 3 and 2nd stage of pipings 4 which are looped are so disposed as to enclose the receiving base 2 and these pipings are connected via motor operated valves 5, 6 to a main piping 7. The many flat spray nozzles 8, 9 facing the end faces of the coils C1, C2 are projected to the long side parts of the pipings 3, 4 on both sides of the receiving bases 2. The cooling water is injected and sprayed therefrom from below to above, by which the force cooling is executed.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、熱間圧延さねた後、巻取られた熱延コイル
の冷却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 cooling a hot-rolled coil that has been hot-rolled and then wound.

〔従来技術とその問題点〕[Prior art and its problems]

この種の熱延コイルの温度は、一般に４００〜７００°
Ｃであり、この熱延コイルを次工程の酸洗ラインに挿入
するためには、約５０°Ｃ近傍まで冷却しなければなら
ない。そのため、従来は、熱延コイルを屋外に平積み、
あるいは一段積みして大気中で放冷していたが、冷却に
は４日間程度要していた。The temperature of this kind of hot rolled coil is generally 400-700°
C, and in order to insert this hot-rolled coil into the pickling line for the next process, it must be cooled to around 50°C. Therefore, in the past, hot-rolled coils were stacked flat outdoors.
Alternatively, they were stacked in a single layer and left to cool in the atmosphere, but cooling took about four days.

このような自然放冷する方法では、冷却効率が悪く、ス
トック量が膨大なものとなり、置場効率が悪化し、さら
に広い置場が必要となり、生産上、経済上、好ましくな
かった。This natural cooling method has poor cooling efficiency, a huge amount of stock, poor storage efficiency, and requires a larger storage space, which is unfavorable from a production and economic point of view.

このような問題点を解決すべく、水や空気を用いて熱延
コイルを強制冷却する方法が多数提案されており、例え
ば水没による冷却（Ｉ＃開昭５６−１１６８３４、特開
昭５７−１１７１２、特開昭５８−１４１３４０等）、
散水による冷却（特開昭５０−５０２１２、特開昭５５
−１０３５５等）、気体による冷却（特開昭４９−９４
５０８、実開昭５７−９８５８）などがあるが、いずれ
も冷却効率が悪い、置場効率が悪い、均一冷却ができな
い、設備費が高くなるなど、いずれかの問題点を有して
いる。In order to solve these problems, many methods have been proposed for forcibly cooling the hot-rolled coil using water or air. , Japanese Patent Publication No. 58-141340, etc.),
Cooling by water sprinkling (JP-A-50-50212, JP-A-55
-10355, etc.), cooling by gas (JP-A-49-94
508, Japanese Utility Model Application No. 57-9858), but all of them have problems such as poor cooling efficiency, poor storage space efficiency, inability to achieve uniform cooling, and high equipment costs.

この発明は、このような事情に鑑みて提案されたもので
、比較的簡単な構成で、冷却効率および置場効率が良く
、さらに均一冷却が可能であるとともにハンドリングの
容易な熱延コイルの冷却方法を提供することを目的とす
る。This invention was proposed in view of the above circumstances, and provides a method for cooling hot-rolled coils that has a relatively simple configuration, has good cooling efficiency and storage efficiency, and is also capable of uniform cooling and is easy to handle. The purpose is to provide

〔問題点を解決するための手段・作用〕この発明に係る
熱延コイルの冷却方法は、熱間圧延・巻取後の熱延コイ
ルを、ダウンエンド状態でコイル受台上に間隔をおいて
一段積みあるいは一段積みし、コイル受台の両側方に、
各熱延コイルの端面に向かうノズルを多数配設し、各ノ
ズルから１０〜９　Ｑ　ｔ／ｒｍｎの冷却水を下方から
上方へ向けて熱延コイルの端面に噴射・散水し、各コイ
ルの両端面を同時に強制冷却し、４００〜７００°Ｃの
熱延コイルを５０″Ｃ近傍まで比較的短時間で冷却でき
るようにしたものである。[Means/effects for solving the problem] The hot-rolled coil cooling method according to the present invention involves placing the hot-rolled coil after hot rolling and winding on a coil pedestal at intervals in a down-end state. Stacked in one layer or stacked in one layer, on both sides of the coil holder,
A large number of nozzles facing the end face of each hot-rolled coil are arranged, and each nozzle injects and sprinkles cooling water of 10 to 9 Qt/rmn from the bottom to the top on the end face of the hot-rolled coil. The hot-rolled coil at 400 to 700°C can be cooled down to around 50''C in a relatively short time by forcing both surfaces to cool at the same time.

〔実　施　例〕〔Example〕

以下、この発明を図示する一実施例に基づいて説明する
。The present invention will be described below based on an illustrated embodiment.

矛１図、牙２図に示すように、屋外ホットコイル場１の
コンクリート床面ＩＡ上に、上面に略Ｖ字状溝２人が多
数形成されたコイル受台２を、間隔をおいて多数設置し
、熱延コイルＣ１をダウンエンド状態で溝２Ａに載置し
て一段積みするとともに、−段積みされた隣り合う熱延
コイル０１間に熱延コイルＣ２を載置して一段積みする
。As shown in Fig. 1 and Fig. 2, on the concrete floor IA of the outdoor hot coil field 1, a large number of coil holders 2 each having a large number of roughly V-shaped grooves formed on the upper surface are placed at intervals. The hot-rolled coils C1 are placed in the groove 2A in a down-end state and stacked in one layer, and the hot-rolled coils C2 are placed between adjacent hot-rolled coils 01 stacked in one layer.

さらに、コイル受台２を取囲むように、ループ状の一段
目用配管３および二段目配管４を配設し、各配管３，４
を電動弁（あるいは電磁弁）５．６を介して主配管７に
接続する。Furthermore, loop-shaped first-stage piping 3 and second-stage piping 4 are arranged so as to surround the coil pedestal 2, and each piping 3, 4
is connected to the main pipe 7 via an electric valve (or solenoid valve) 5.6.

配管３，４のコイル受台両側方における長辺部分には、
各熱延コイルＣ１、各熱延コイルＣ２の端面に向かうフ
ラットスプレーノズル８．９を多数突設し、各熱延コイ
ルＣ１＋　Ｃ２を２つのフラットスプレーノズルを用い
て両端面から同時に強制冷却する。On the long sides of the pipes 3 and 4 on both sides of the coil holder,
A large number of flat spray nozzles 8.9 are protruded toward the end faces of each hot-rolled coil C1 and each hot-rolled coil C2, and each hot-rolled coil C1+C2 is forcedly cooled simultaneously from both end faces using two flat spray nozzles.

ここで、配管３，４はほぼ同一レベルにあり、二段目用
配管４のフラットスプレーノズル９の方が熱延コイルＣ
の端面より遠（位置しているため、二段目用配管４の方
を一段目配管３よりも高圧とする。例えば、主配管の圧
力を２　Ｋｇ／ｃＪとし、電動弁５．６により一段目用
配管３の圧力を０．５　ｘｇ／ｉ、二段目用配管４の圧
力をＩ　Ｋｆ／ｉとする。Here, the pipes 3 and 4 are on almost the same level, and the flat spray nozzle 9 of the second-stage pipe 4 is closer to the hot-rolled coil C.
Since the second-stage pipe 4 is located further away from the end face of The pressure in the eye pipe 3 is 0.5 x g/i, and the pressure in the second stage pipe 4 is I Kf/i.

また電動弁（あるいは電磁弁）５．６は、列毎に遠隔操
作するとともにこれにタイマーをセットして自動的に散
水開始・終了を行なえるものとする。Furthermore, the electric valves (or solenoid valves) 5 and 6 can be remotely operated for each row and can be set with a timer to automatically start and end watering.

矛３図に示すように、各７ラツトスプレーノズル８．９
からの冷却水が下方から上方へと噴射・散水され、各熱
延コイルＣ１＋Ｃ２が同時にかつ均一に冷却される。な
お、床面ＩＡには傾斜を付けて使用後の冷却水を容易に
回収ピット１０に回収で営るようにする。As shown in Figure 3, each 7 rat spray nozzle 8.9
Cooling water is injected and sprinkled from below to above, and each hot-rolled coil C1+C2 is cooled simultaneously and uniformly. Incidentally, the floor surface IA is sloped so that the used cooling water can be easily collected into the collection pit 10.

矛４図、、１’５図に示すような寸法のコイル、装置レ
イアウトであれば、−段目用フラットスプレーノズル８
は、スプレー角５０°、傾斜角１０°。If the coil and equipment layout are as shown in Figures 4 and 1'5, flat spray nozzle 8 for the -th stage will be used.
The spray angle is 50° and the tilt angle is 10°.

二段目用フラットスプレーノズル９は、スプレー角２５
°、傾斜角８°とする。冷却水使用量は、１Ｋｇ／ａｄ
　　の−段目用配管３で１ノズル当り２５ｔ／ｍｉｎ、
　ｏ、ｓＫ９／−の二段目用配管４で１ノズル当り２１
１　／ｍｉｎ　である。The second stage flat spray nozzle 9 has a spray angle of 25
The angle of inclination is 8°. Cooling water consumption is 1Kg/ad
25t/min per nozzle for - stage piping 3,
o, 21 per nozzle for second stage piping 4 of sK9/-
1/min.

このような冷却設備によってコイル幅、コイル重量の異
なる熱延コイルを冷却したところ、次表に示すように幅
、重量に関係なくｏ、９ｍｙｔ穆度で冷却が可能であり
、冷却のランニングコストも少額となり、便益大である
。When hot-rolled coils with different coil widths and coil weights were cooled using this type of cooling equipment, as shown in the following table, it was possible to cool the coils with a degree of 0.9 myt, regardless of the width or weight, and the running cost of cooling was also reduced. The cost is small and the benefits are large.

散水時間と水使用量 さらに、矛６図に示すように、ダウンコイラ巻取完了か
ら５０℃冷却まで、１ｏ〜１４時間で可能であり、冷却
に要する時間は従来の約１／８となり、大幅なリードタ
イムの短縮を図れる。Watering time and water usage In addition, as shown in Figure 6, it is possible to cool the down coiler to 50℃ from the completion of winding it in 1 to 14 hours, and the time required for cooling is approximately 1/8 of the conventional time, which is a significant improvement. Lead time can be shortened.

なお、以上は一段積みの例を示したが、−段積みでも一
段目用配管３のみを使用すれば良く、−段積みの冷却を
除外する意図ではない。In addition, although the example of one-stage stacking has been shown above, it is sufficient to use only the first-stage pipe 3 even in the case of -stage stacking, and this is not intended to exclude cooling of -stage stacking.

〔発明の効果〕〔Effect of the invention〕

前述のとおり、本発明によれば、−段積みあるいは一段
積みされた各熱延コイルの端面に向かうノズルを多数配
設し、各ノズルから冷却水を下方から上方へと向けて熱
延コイル端面に噴射・散水して、各熱延コイルの両端面
を同時に冷却するようにしたため、次のような効果を奏
する。As described above, according to the present invention, - A large number of nozzles are provided to direct toward the end face of each hot-rolled coil stacked or stacked in a single layer, and cooling water is directed from the bottom to the top from each nozzle to the end face of the hot-rolled coil. Since both end faces of each hot-rolled coil are cooled at the same time by being sprayed with water, the following effects can be achieved.

（ｉ）　　冷却効率が従来の約１／８と大幅に向上し、
置場効率が極めて向上する。(i) Cooling efficiency has been significantly improved to approximately 1/8 of the conventional level,
Storage efficiency is greatly improved.

（１１）　　多数の熱延コイルを同時にかつ均一に冷却
し得る。(11) A large number of hot rolled coils can be cooled simultaneously and uniformly.

（１１０散水量を０．９ｍンを程度となり、冷却のラン
ニングコストも少な（てすむ。(110) The amount of water sprayed is approximately 0.9 m, and the running cost for cooling is also low.

ｆｉｖ）　　コイル受台にダウンエンド状態で積むだけ
でよいので、ハンドリングが容易である。fiv) Handling is easy because it is only necessary to stack the coils in the down-end state on the coil cradle.

（ｖ）現設備を簡単に改造するだけでよいので、イニシ
ャルコストも少なくてすむ。(v) Since it is only necessary to simply modify the existing equipment, the initial cost can be reduced.

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

矛１図、矛２図はこの発明に係る冷却方法を実施するた
めの設備を示す正面図、平面図、矛３図はその散水状態
を示す正面図、矛４図、牙５図は冷却設備の具体例を示
す正面図、側面図、矛６図はコイル温度と冷却時間の関
係を示すグラフである。 １・・・・・・屋外ホットコイル場、ＩＡ・・・・・・
床面、２・・・・・・コイル受台、２Ａ・・・・・・略
■字状溝、３・・・−段目用配管、４・・・・・・二段
目用配管、５，６・・・電動弁（電磁弁）、７・・・・
・・主配管、８．９・・・・・・フラットスプレーノズ
ル、１０・・・・・・回収ピットｎ　ヤ　東　咽　招　
ｐFigures 1 and 2 are a front view and a plan view showing the equipment for carrying out the cooling method according to the present invention, Figure 3 is a front view showing the water sprinkling state, and Figures 4 and 5 are cooling equipment. A front view, a side view, and a graph showing the relationship between coil temperature and cooling time are graphs showing specific examples. 1...Outdoor hot coil field, IA...
Floor surface, 2... Coil pedestal, 2A... Approximate ■-shaped groove, 3... Piping for -stage, 4... Piping for second stage, 5, 6...Electric valve (solenoid valve), 7...
...Main piping, 8.9...Flat spray nozzle, 10...Collection pit
p

Claims (1)

【特許請求の範囲】[Claims] （１）熱間圧延・巻取後の熱延コイルを、ダウンエンド
状態でコイル受台上に間隔をおいて一段積みあるいは一
段積みし、前記コイル受台の両側方に、各熱延コイルの
端面に向かうノズルを多数配設し、各ノズルから冷却水
を下方から上方へ向けて熱延コイルの端面に噴射。 散水することを特徴とする熱延コイルの冷却方法。(1) The hot-rolled coils after hot rolling and winding are stacked in a single layer or one layer at intervals on a coil pedestal in a down-end state, and each hot-rolled coil is stacked on both sides of the coil pedestal. A large number of nozzles are installed that face the end face, and each nozzle injects cooling water from the bottom to the top onto the end face of the hot-rolled coil. A method for cooling a hot-rolled coil characterized by sprinkling water.