JP2014070272A - Water cooling device of continuous annealing equipment - Google Patents
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- JP2014070272A JP2014070272A JP2012220167A JP2012220167A JP2014070272A JP 2014070272 A JP2014070272 A JP 2014070272A JP 2012220167 A JP2012220167 A JP 2012220167A JP 2012220167 A JP2012220167 A JP 2012220167A JP 2014070272 A JP2014070272 A JP 2014070272A
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Abstract
Description
本発明は、連続式焼鈍設備の急冷帯に配置される水冷装置で冷却水を噴射するノズルの変形防止に優れるものに関する。 The present invention relates to a nozzle that is excellent in preventing deformation of a nozzle that injects cooling water with a water cooling device arranged in a quench zone of a continuous annealing facility.
図４は鋼帯の連続式焼鈍設備１の構成を説明する図で、コイルからペイオフリール２で払い戻された鋼帯ａは、予熱帯４と加熱帯５で所定の温度に加熱された後、鋼種に応じて急冷帯６で冷却され、過時効帯７、冷却帯８で所望する強度に調整されテンションリール１０で巻き取られる。 FIG. 4 is a diagram for explaining the structure of the continuous annealing equipment 1 for the steel strip. After the steel strip a repaid from the coil by the payoff reel 2 is heated to a predetermined temperature in the pre-tropical zone 4 and the heating zone 5, The steel is cooled in the quenching zone 6 according to the steel type, adjusted to a desired strength in the overaging zone 7 and the cooling zone 8, and taken up by the tension reel 10.
連続式焼鈍設備１を通過する鋼帯ａは、テンションリール１０により張力が負荷され、入側ルーパー３と出側ルーパー９で連続式焼鈍設備１内を通過する鋼帯ａが確保される。 The steel strip a passing through the continuous annealing equipment 1 is tensioned by the tension reel 10, and the steel strip a passing through the continuous annealing equipment 1 is secured by the entrance side looper 3 and the exit side looper 9.
図５は急冷帯６の構造を説明する図で、所定の温度に加熱された鋼帯ａはクエンチタンク１２内で、クエンチノズル１１のノズル（図示しない）から噴出する冷却水によって両側から急冷された後、シールロール１３、リンガーロール１４によって水きりした後、ドライヤー１５で乾燥され、次工程に進む。 FIG. 5 is a view for explaining the structure of the quenching zone 6. The steel strip a heated to a predetermined temperature is quenched from both sides in the quench tank 12 by cooling water ejected from a nozzle (not shown) of the quench nozzle 11. Then, after draining with the seal roll 13 and the ringer roll 14, it is dried with the dryer 15, and it progresses to the next process.
急冷帯６における冷却機構として、水溶液による水冷装置や水冷ロール装置が利用されている。図６は、水溶液による水冷装置に用いる、水浴中の鋼帯の表面の蒸気膜を破壊するために水を噴出させるクエンチノズルの概略構成を説明する垂直方向断面図で、鋼帯ａは図の上から下方向に移動する。 As a cooling mechanism in the quenching zone 6, a water cooling device or a water cooling roll device using an aqueous solution is used. FIG. 6 is a vertical sectional view for explaining a schematic configuration of a quench nozzle used for a water-cooling apparatus using an aqueous solution to eject water in order to destroy a vapor film on the surface of a steel strip in a water bath. Move from top to bottom.
図６は鋼帯ａを中心として左右対称に配置されるクエンチノズルの片側を示す図である。クエンチノズル１１は、水浴中の鋼帯の表面の蒸気膜を破壊するために水供給管１７からの水を噴出させるノズル１６を用いる。 FIG. 6 is a view showing one side of the quench nozzle arranged symmetrically about the steel strip a. The quench nozzle 11 uses a nozzle 16 that ejects water from the water supply pipe 17 in order to break the vapor film on the surface of the steel strip in the water bath.
水冷装置で水冷しない操業の場合には、水冷装置内の雰囲気ガスの温度が約２５０℃で、ノズル先端１６ａが鋼帯ａ（約５５０〜７００℃）からの輻射熱に曝され、輻射熱により加熱されないノズル後端１６ｂとの温度差で生ずる熱膨張の差によりノズル１６が変形するおそれがある。 In the case of operation without water cooling by the water cooling device, the temperature of the atmospheric gas in the water cooling device is about 250 ° C., the nozzle tip 16a is exposed to radiant heat from the steel strip a (about 550 to 700 ° C.), and is not heated by radiant heat. The nozzle 16 may be deformed due to a difference in thermal expansion caused by a temperature difference from the nozzle rear end 16b.
特許文献１はライン上流側から水冷ロール装置と水溶液による水冷装置を直列に配したものを提案している。水冷装置を使用しない場合のノズル変形を防止するため、水冷装置のチャンバー内のスプレーノズルの背方にノズルボックスを設け、その中にスプレーノズルを後退させ、更にノズルボックス内に後退したスプレーノズルとストリップの間に熱遮蔽板を挿脱可能に装入できる構造とすることが記載されている。 Patent Document 1 proposes a water-cooled roll device and a water-cooled device using an aqueous solution arranged in series from the upstream side of the line. In order to prevent deformation of the nozzle when the water cooling device is not used, a nozzle box is provided behind the spray nozzle in the chamber of the water cooling device, the spray nozzle is retracted therein, and the spray nozzle is further retracted into the nozzle box. It is described that a heat shielding plate can be removably inserted between the strips.
実操業において水冷装置を使用しない場合は、クエンチノズルを炉外へ搬出することも行われている。 When a water cooling device is not used in actual operation, the quench nozzle is also carried out of the furnace.
特許文献１記載の水冷装置は、チャンバー内のスプレーノズルの背方に設けたノズルボックス部内にスプレーノズルを後退させ、更に熱遮蔽板を用いるが、ノズル先端はストリップに対向したままで、輻射熱に長時間曝された場合の影響が懸念される。スプレーノズルを後退させるのみでは、ストリップ側となるスプレーノズルの先端側のみが輻射熱に曝されて、後端側との熱歪によって変形する。 The water cooling device described in Patent Document 1 retreats the spray nozzle into a nozzle box provided behind the spray nozzle in the chamber, and further uses a heat shielding plate. However, the nozzle tip remains facing the strip and radiates heat. There are concerns about the effects of prolonged exposure. Only by retracting the spray nozzle, only the front end side of the spray nozzle on the strip side is exposed to radiant heat, and is deformed by thermal distortion with the rear end side.
また、ノズルを水冷装置から取り出して炉外へ搬出する方法は、その効果は確実に得られるが、ノズルの装入、搬出作業の間に炉を開放するため、連続式焼鈍設備の操業が休止し、生産性が大きく低下する。 In addition, the method of removing the nozzle from the water cooling device and carrying it out of the furnace is surely effective, but the operation of the continuous annealing equipment is suspended because the furnace is opened during the loading and unloading operations of the nozzle. And productivity is greatly reduced.
そこで、本発明は、連続式焼鈍設備の急冷帯において水冷をしない場合であっても、高温の鋼帯に曝される、冷却水を噴出させるノズルが変形しない水冷装置を提供することを目的とする。 Then, even if it is a case where water cooling is not performed in the quenching zone of a continuous annealing equipment, the present invention aims to provide a water cooling device that is exposed to a high-temperature steel strip and that does not deform a nozzle that ejects cooling water. To do.
本発明の課題は以下の手段で達成可能である。
１．連続式焼鈍設備の急冷帯に配置される水冷装置であって、前記水冷装置は、
クエンチタンクと前記クエンチタンク内で、間隔を設けて対向配置される、２台のクエンチノズルを有し、前記クエンチノズルは複数のノズルと前記ノズルに冷却水を供給する水供給管を備え、前記２台のクエンチノズルの各々の水平方向両端部は、前記クエンチタンク内に設けられた支持回転機構によって、前記水冷装置で鋼帯を水冷する場合は前記ノズルが前記２台のクエンチノズル間で前記鋼帯を挟んで対向し、前記水冷装置で鋼帯を水冷しない場合は前記鋼帯を挟んで背向するように回転可能に支持され、前記支持回転機構は、前記クエンチノズルの両端部を支持する機構の少なくとも一方に、前記クエンチノズルが膨張した際の膨張代を吸収する空隙を有していることを特徴とする連続式焼鈍設備の水冷装置。
２．前記２台のクエンチノズルは、前記ノズルの反対側となる外壁面が前記外壁面と空隙を有して取り付けられた防熱板で覆われていることを特徴とする１記載の連続式焼鈍設備の水冷装置。
３．前記支持回転機構が、前記クエンチタンク内で前記クエンチノズルを水平軸まわりに回転可能に支持する支持構造体と前記クエンチノズルを回転させる回転機構を備え、前記回転機構は、前記クエンチノズルのノズルを前記２台のクエンチノズル間で対向、または背向させるように前記クエンチノズルの水平方向両端部の少なくとも一方に取り付けたウォームホイールと、前記ウォームホイールに噛み合うウォームと前記ウォームを回転させる駆動機構を有し、前記駆動機構が前記支持構造体に取り付けられていることを特徴とする１または２記載の連続式焼鈍設備の水冷装置。
The object of the present invention can be achieved by the following means.
1. A water cooling device disposed in a quench zone of a continuous annealing facility, the water cooling device,
In the quench tank and the quench tank, there are two quench nozzles arranged to face each other with a gap, and the quench nozzle includes a plurality of nozzles and a water supply pipe for supplying cooling water to the nozzles, In the horizontal direction of each of the two quench nozzles, the nozzle rotates between the two quench nozzles when the steel strip is water-cooled by the water-cooling device by a support rotation mechanism provided in the quench tank. Opposing across the steel strip, if the steel strip is not water cooled by the water cooling device, it is supported so as to be able to rotate back so as to sandwich the steel strip, and the support rotation mechanism supports both ends of the quench nozzle A water-cooling device for a continuous annealing facility, wherein at least one of the mechanisms that perform the above-described process has a gap that absorbs an expansion allowance when the quench nozzle expands.
2. 2. The continuous quenching equipment according to claim 1, wherein the two quench nozzles are covered with a heat insulating plate attached to an outer wall surface opposite to the nozzles with a gap from the outer wall surface. Water cooling device.
3. The support rotation mechanism includes a support structure that rotatably supports the quench nozzle around a horizontal axis in the quench tank and a rotation mechanism that rotates the quench nozzle, and the rotation mechanism includes a nozzle of the quench nozzle. A worm wheel attached to at least one of both ends of the quench nozzle in the horizontal direction so that the two quench nozzles face or face each other, a worm meshing with the worm wheel, and a drive mechanism for rotating the worm. The water cooling device for continuous annealing equipment according to claim 1 or 2, wherein the drive mechanism is attached to the support structure.
本発明によれば、連続式焼鈍設備の急冷帯用の水冷装置として、水焼入れを行わない操業の場合でも、通板する鋼帯の輻射熱で、ノズルが変形しないものが得られ、急冷帯で水焼入れを行う操業と水焼入れを行わない操業とを炉の開放無しで連続して切り替えることができ、生産性が著しく向上し、産業上極めて有用である。 According to the present invention, as a water cooling device for the quenching zone of the continuous annealing equipment, even in the case of operation without water quenching, a radiant heat of the steel strip passing through the nozzle is obtained, and the quenching zone is obtained. The operation of performing water quenching and the operation of not performing water quenching can be continuously switched without opening the furnace, and the productivity is remarkably improved, which is extremely useful industrially.
以下、本発明を図面を用いて詳細に説明する。本発明は前図４、５で説明する連続式焼鈍設備の急冷帯に配置される水冷装置の構造に関し、当該水冷装置は、クエンチタンク１２とクエンチタンク１２の内部で、間隔を設けて対向配置される、２台のクエンチノズル１１（前図６に概略構造を示す）を有する。 Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention relates to the structure of a water cooling device arranged in the quenching zone of the continuous annealing equipment described in FIGS. 4 and 5, and the water cooling device is disposed opposite to each other inside the quench tank 12 and the quench tank 12. And two quench nozzles 11 (shown schematically in FIG. 6).
図３は本発明に係る水冷装置のクエンチタンク１２（図示しない）の内部構造を１台のクエンチノズル１１を用いて説明する概略図で、クエンチノズル１１の水平方向両端部は、クエンチタンク１２内に設けられた支持回転機構によって水平軸まわりに回転可能に支持されている。 FIG. 3 is a schematic diagram for explaining the internal structure of the quench tank 12 (not shown) of the water cooling apparatus according to the present invention using one quench nozzle 11, and both ends in the horizontal direction of the quench nozzle 11 are located in the quench tank 12. Is supported so as to be rotatable around a horizontal axis.
支持回転機構は、クエンチタンク１２内でクエンチノズル１１を水平軸まわりに回転可能に支持する支持構造体２３とクエンチノズル１１を回転させる回転機構を備える。支持構造体２３はクエンチタンク１２に脚部の先端が固定された門形構造で、両側の脚部の間で、クエンチノズル１１を水平軸まわりに回転可能に支持する支持機構（図示しない）を両側の脚部に有している。 The support rotation mechanism includes a support structure 23 that supports the quench nozzle 11 rotatably around the horizontal axis in the quench tank 12, and a rotation mechanism that rotates the quench nozzle 11. The support structure 23 is a portal structure in which the tip of the leg is fixed to the quench tank 12, and a support mechanism (not shown) that supports the quench nozzle 11 so as to be rotatable around the horizontal axis between the legs on both sides. Has on the legs on both sides.
支持機構は、例えば、回転軸受け構造で、水冷をしない操業の場合に、クエンチノズル１１が膨張しても回転可能なように膨張代を吸収する空隙を有する。 The support mechanism has, for example, a rotary bearing structure and has a gap that absorbs the expansion allowance so that the quench nozzle 11 can rotate even when the quench nozzle 11 expands in the case of operation without water cooling.
回転機構は、クエンチノズル１１の水平方向の端部に取り付けたウォームホイール２１ｂと、ウォームホイール２１ｂに噛み合うウォーム２１ａとウォーム２１ａを回転させる駆動機構を備える。駆動機構はモータ２０と減速機１９で構成され、支持構造体２３に取り付けられている。回転機構は、クエンチノズル１１の水平方向両端部の少なくとも一方に取り付ける。 The rotation mechanism includes a worm wheel 21b attached to the horizontal end of the quench nozzle 11, a worm 21a meshing with the worm wheel 21b, and a drive mechanism for rotating the worm 21a. The drive mechanism includes a motor 20 and a speed reducer 19 and is attached to the support structure 23. The rotation mechanism is attached to at least one of both ends of the quench nozzle 11 in the horizontal direction.
急冷帯の水冷装置で鋼帯（図示しない）を水冷する場合は、回転機構の駆動機構で２台のクエンチノズル１１を、ノズル１６が鋼帯を挟んで対向するように回転させる（前図６）。 When the steel strip (not shown) is water-cooled by the water cooling device in the quenching zone, the two quench nozzles 11 are rotated by the drive mechanism of the rotating mechanism so that the nozzles 16 face each other with the steel strip interposed therebetween (previous FIG. 6). ).
急冷帯の水冷装置で鋼帯を水冷しない場合は、図１に示すように、回転機構の駆動機構で２台のクエンチノズル１１を、ノズル１６が鋼帯ａを挟んで背向するように回転させる（図１は鋼帯ａを中心として左右対称に配置されるクエンチノズルの片側を示す図である）。 When the steel strip is not cooled by the water cooling device in the quenching zone, as shown in FIG. 1, the two quench nozzles 11 are rotated by the drive mechanism of the rotation mechanism so that the nozzles 16 face away across the steel strip a. (FIG. 1 is a diagram showing one side of a quench nozzle arranged symmetrically about the steel strip a).
本発明によれば、ノズル１６と鋼帯ａとの間の距離が長くなり、更にノズル１６と鋼帯ａとの間にクエンチノズル１１を構成する外壁や水供給管１７が挟まれるため、鋼帯ａからノズル１６への輻射熱が遮られるとともに、ノズル１６におけるノズル先端１６ａとノズル後端１６ｂとの温度差も小さくなり、ノズル１６の変形が抑制される。 According to the present invention, the distance between the nozzle 16 and the steel strip a is increased, and the outer wall and the water supply pipe 17 constituting the quench nozzle 11 are further sandwiched between the nozzle 16 and the steel strip a. The radiant heat from the band a to the nozzle 16 is blocked, and the temperature difference between the nozzle front end 16a and the nozzle rear end 16b in the nozzle 16 is reduced, and deformation of the nozzle 16 is suppressed.
クエンチノズル１１でノズル１６の反対側となる外壁面を防熱板１８で覆うと更に鋼帯ａからの輻射熱の影響が軽減されて好ましい（図２）。防熱板１８は，防熱板１８とクエンチノズル１１との間に空隙が生じるように支持部材２２を介してクエンチノズル１１に取り付ける。 It is preferable to cover the outer wall surface on the opposite side of the nozzle 16 with the quench nozzle 11 with a heat insulating plate 18 because the influence of radiant heat from the steel strip a is further reduced (FIG. 2). The heat insulating plate 18 is attached to the quench nozzle 11 via the support member 22 so that a gap is generated between the heat insulating plate 18 and the quench nozzle 11.
図５に示す水冷装置を用いて、鋼帯ａに対してクエンチノズル１１を図６に示すように配置して、鋼帯ａを急冷しない操業を行った。ノズル１６に４０ｋｇｆ／ｍｍ２以上の熱応力が生じて、ノズル先端１６ａとノズル後端１６ｂの間に座屈が発生し、クエンチノズル１１を水冷装置の外に出さなければならなかった。 Using the water-cooling apparatus shown in FIG. 5, the quench nozzle 11 was arranged as shown in FIG. 6 with respect to the steel strip a, and the operation without rapidly cooling the steel strip a was performed. A thermal stress of 40 kgf / mm 2 or more was generated in the nozzle 16, causing buckling between the nozzle front end 16a and the nozzle rear end 16b, and the quench nozzle 11 had to be taken out of the water cooling device.
一方、本発明により、鋼帯ａに対してクエンチノズル１１を図１に示すように配置し、鋼帯ａを急冷しない操業を行った場合ではノズル１６の熱応力を６ｋｇｆ／ｍｍ２以下に低減でき、ノズル先端１６ａとノズル後端１６ｂの間での座屈発生が防止され、クエンチノズル１１を水冷装置の外に出す必要はなかった。 On the other hand, according to the present invention, when the quench nozzle 11 is arranged as shown in FIG. 1 with respect to the steel strip a and the operation is performed without rapidly cooling the steel strip a, the thermal stress of the nozzle 16 is reduced to 6 kgf / mm 2 or less. It was possible to prevent buckling between the nozzle front end 16a and the nozzle rear end 16b, and there was no need to take the quench nozzle 11 out of the water cooling device.
本発明によれば、水焼入れを行う操業と急冷を行わない操業との切替時間を半減できるようになった。 According to the present invention, it has become possible to halve the switching time between the operation of water quenching and the operation of not quenching.
１ 連続式焼鈍設備
２ ペイオフリール
３ 入側ルーパー
４ 予熱帯
５ 加熱帯
６ 急冷帯
７ 過時効帯
８ 冷却帯
９ 出側ルーパー
１０ テンションリール
１１ クエンチノズル
１２ クエンチタンク
１３ シールロール
１４ リンガーロール
１５ ドライヤー
１６ ノズル
１６ａ ノズル先端
１６ｂ ノズル後端
１７ 水供給管
１８ 防熱板
１９ 減速機
２０ モータ
２１ａ ウォーム
２１ｂ ウォームホイール
２２ 支持部材
２３ 支持構造体
ａ 鋼帯
DESCRIPTION OF SYMBOLS 1 Continuous annealing equipment 2 Payoff reel 3 Entrance side looper 4 Pre-tropical zone 5 Heating zone 6 Quench zone 7 Overaging zone 8 Cooling zone 9 Exit side looper 10 Tension reel 11 Quench nozzle 12 Quench tank 13 Seal roll 14 Ringer roll 15 Dryer 16 Nozzle 16a Nozzle tip 16b Nozzle rear end 17 Water supply pipe 18 Heat shield 19 Reduction gear 20 Motor 21a Worm 21b Worm wheel 22 Support member 23 Support structure a Steel strip
Claims (3)
クエンチタンクと前記クエンチタンク内で、間隔を設けて対向配置される、２台のクエンチノズルを有し、前記クエンチノズルは複数のノズルと前記ノズルに冷却水を供給する水供給管を備え、前記２台のクエンチノズルの各々の水平方向両端部は、前記クエンチタンク内に設けられた支持回転機構によって、前記水冷装置で鋼帯を水冷する場合は前記ノズルが前記２台のクエンチノズル間で前記鋼帯を挟んで対向し、前記水冷装置で鋼帯を水冷しない場合は前記鋼帯を挟んで背向するように回転可能に支持され、前記支持回転機構は、前記クエンチノズルの両端部を支持する機構の少なくとも一方に、前記クエンチノズルが膨張した際の膨張代を吸収する空隙を有していることを特徴とする連続式焼鈍設備の水冷装置。 A water cooling device disposed in a quench zone of a continuous annealing facility, the water cooling device,
In the quench tank and the quench tank, there are two quench nozzles arranged to face each other with a gap, and the quench nozzle includes a plurality of nozzles and a water supply pipe for supplying cooling water to the nozzles, In the horizontal direction of each of the two quench nozzles, the nozzle rotates between the two quench nozzles when the steel strip is water-cooled by the water-cooling device by a support rotation mechanism provided in the quench tank. Opposing across the steel strip, if the steel strip is not water cooled by the water cooling device, it is supported so as to be able to rotate back so as to sandwich the steel strip, and the support rotation mechanism supports both ends of the quench nozzle A water-cooling device for a continuous annealing facility, wherein at least one of the mechanisms that perform the above-described process has a gap that absorbs an expansion allowance when the quench nozzle expands.
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| JP2017119912A (en) * | 2015-12-28 | 2017-07-06 | Ｊｆｅスチール株式会社 | Quick-cooling quenching apparatus, and quick-cooling quenching method |
| WO2017115742A1 (en) * | 2015-12-28 | 2017-07-06 | Ｊｆｅスチール株式会社 | Rapid cooling quenching device and rapid cooling quenching method |
| CN112626318A (en) * | 2020-12-07 | 2021-04-09 | 江苏江顺精密机电设备有限公司 | Standing wave water-cooling online quenching device |
| WO2023105846A1 (en) * | 2021-12-10 | 2023-06-15 | Ｊｆｅスチール株式会社 | Steel strip production device, continuous annealing facility, and production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017119912A (en) * | 2015-12-28 | 2017-07-06 | Ｊｆｅスチール株式会社 | Quick-cooling quenching apparatus, and quick-cooling quenching method |
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| JP7473006B2 (en) | 2021-12-10 | 2024-04-23 | Ｊｆｅスチール株式会社 | Steel strip manufacturing equipment, continuous annealing equipment and manufacturing method |
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