JPH08104918A - Device for removing skid mark in walking beam type continuous heating furnace - Google Patents

Device for removing skid mark in walking beam type continuous heating furnace

Info

Publication number
JPH08104918A
JPH08104918A JP24277194A JP24277194A JPH08104918A JP H08104918 A JPH08104918 A JP H08104918A JP 24277194 A JP24277194 A JP 24277194A JP 24277194 A JP24277194 A JP 24277194A JP H08104918 A JPH08104918 A JP H08104918A
Authority
JP
Japan
Prior art keywords
furnace
skid
gas
heated
end parts
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
Application number
JP24277194A
Other languages
Japanese (ja)
Other versions
JP2656002B2 (en
Inventor
Tetsuo Akiyama
鉄夫 秋山
Hirotoshi Uejima
啓利 上島
Kiyokazu Nagai
精和 永井
Toshio Shimada
利生 嶋田
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.)
Chugai Ro Co Ltd
Original Assignee
Chugai Ro Co Ltd
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 Chugai Ro Co Ltd filed Critical Chugai Ro Co Ltd
Priority to JP6242771A priority Critical patent/JP2656002B2/en
Publication of JPH08104918A publication Critical patent/JPH08104918A/en
Application granted granted Critical
Publication of JP2656002B2 publication Critical patent/JP2656002B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

PURPOSE: To suppress occurrence of a skid mark by using the existing circulating fan, by adopting an accumulate heat regenerative circulating system, blowing high temp. gas at the opening hole part pair arranged near the skid mark occurring part and alternately executing the suction. CONSTITUTION: One pair of ducts 12 and 13 horizontally extended in the furnace width direction in a walking beam type continuous heating furnace 2 and closed at the tip end parts 12a, 13a are connected with tubes 12b, 13b having the opening hole parts at the tip end parts directed to near the position bringing a material S to the heated into contact with skid buttoms 5, 6. The end parts of the ducts 12, 13 extended outside the furnace are connected with each of the end parts of one pair of regenerators 16, 17 and the other end parts of the regenerators 16, 17 are connected with a suction part 25a of a circulating fan 25 with the piping through switch valves 20, 21 and a heat exchanger 24 and further, connected with gas exhausting part 25b of the circulating fan 25 through switch valves 29, 30. Then the suction of the high temp. gas in the furnace and the blowing-out of the regenerative high temp. gas are alternately executed between the ducts 12 and 13.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ウォーキングビーム式
連続鋼片加熱炉において被加熱材に発生するスキッドマ
ークの除去装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing skid marks generated on a material to be heated in a walking beam type continuous billet heating furnace.

【0002】[0002]

【従来の技術】ウォーキングビーム式連続加熱炉におい
て、炉内に装入された鋼片等の被加熱材は、図6に示す
ように、炉長方向に並列に延設された複数の固定スキッ
ドビーム62上に所定間隔ごとに配置されているスキッ
ドボタン65と、固定スキッドビーム62間に配設され
炉長方向に間欠的に矩形運動する可動スキッドビーム6
7上のスキッドボタン66に交互に置き換えながら炉抽
出側に搬送されるようになっている。
2. Description of the Related Art In a walking beam type continuous heating furnace, as shown in FIG. 6, a plurality of fixed skids extending in parallel in a furnace length direction are provided with a material to be heated such as a billet. A skid button 65 disposed at predetermined intervals on the beam 62; and a movable skid beam 6 disposed between the fixed skid beams 62 and intermittently moving in a rectangular direction in the furnace length direction.
It is designed to be transferred to the furnace extraction side while being alternately replaced with the skid button 66 on the 7 side.

【0003】この搬送過程で、被加熱材Sは所定温度で
加熱されることになるが、上記スキッドビーム62,6
7は内部を循環する冷却水によって炉内ガス温度より低
温になっており、また、炉壁61下部に設けたバーナ6
9から噴射される燃焼火炎からの輻射熱がスキッドビー
ム62,67によって遮られ、これらの陰に位置する被
加熱材Sの部分では伝熱特性が低くなっている。このた
め、スキッドボタン65,66との接触部位近傍および
上記伝熱特性の低い部分の被加熱材Sの温度が他の部分
に比べて低温となり、その結果、抽出後の被加熱材Sに
スキッドマークが発生していた。このスキッドマーク
は、圧延後の製品の寸法精度、品質等に悪影響を及ぼす
ため、これを発生させないことが望まれる。スキッドマ
ークの発生を抑えるために、炉長を長くしたり搬送速度
を遅くするなどして被加熱材Sの在炉時間を延ばす方法
もあるが、燃料消費量が増大してコストが高くなり、か
つ生産性の低下を招くことになる。
In the transport process, the material S to be heated is heated at a predetermined temperature.
Numeral 7 is lower than the gas temperature in the furnace by the cooling water circulating in the furnace.
Radiant heat from the combustion flame injected from the nozzle 9 is blocked by the skid beams 62 and 67, and the portion of the heated material S located behind these has low heat transfer characteristics. For this reason, the temperature of the heated material S in the vicinity of the contact portion with the skid buttons 65 and 66 and the portion having the low heat transfer characteristic is lower than the other portions, and as a result, the heated material S after extraction has a skid on the heated material S. A mark had occurred. This skid mark adversely affects the dimensional accuracy, quality, and the like of the product after rolling, and it is desired that the skid mark not be generated. In order to suppress the occurrence of skid marks, there is a method of extending the furnace time of the material S to be heated by elongating the furnace length or slowing down the conveying speed, but the fuel consumption increases and the cost increases, In addition, the productivity is reduced.

【0004】そのため、従来よりスキッドマークを除去
するための装置、方法について種々のものが提案されて
いる。その代表的なものがスキッドマークの発生し易い
部分(以下、「スキッドマーク発生部」という。)に燃
焼火炎または高温の燃焼ガスをチューブを介して局部的
に吹き付けて加熱するものであり、例えば実公昭60−
38658号公報、実公昭57−27787号公報、実
公昭58−29168号公報に開示されている。
Therefore, various devices and methods for removing skid marks have been conventionally proposed. A typical example is a method in which a combustion flame or a high-temperature combustion gas is locally blown through a tube to a portion where a skid mark is likely to be generated (hereinafter, referred to as a “skid mark generation portion”) and heated. 60
38658, JP-B-57-27787, and JP-B-58-29168.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、上記各
公報に開示される構成は、炉内を加熱するメインバーナ
の他に複数の補助バーナを設けているので、そのための
配管、計装が必要であり、また上記チューブの材質は1
500〜1600℃の燃焼火炎に耐え得る超高温耐熱性
が要求されることから、設備コストが高くなるという問
題がある。特に、上記補助バーナの燃料として重油を使
用した場合には、ガス燃料を使用する場合よりもさらに
燃焼火炎が伸び、燃焼ガスを吹き付けるチューブの寿命
は一層短くなり、耐久性に欠けることになる。
However, in the configurations disclosed in the above publications, a plurality of auxiliary burners are provided in addition to the main burner for heating the inside of the furnace, so that piping and instrumentation for that are required. Yes, and the tube material is 1
Since ultrahigh-temperature heat resistance capable of withstanding a combustion flame of 500 to 1600 ° C. is required, there is a problem that equipment cost is increased. In particular, when heavy oil is used as the fuel for the auxiliary burner, the combustion flame extends further than when gas fuel is used, and the life of the tube for blowing the combustion gas is further shortened, resulting in lack of durability.

【0006】補助バーナを設ける構成とした場合には上
記のような問題があるため、炉内の高温ガスを強制的に
循環させてスキッドマーク発生部に吹き付ける方法も考
えられる。そのためには、例えば1300℃にもなる高
温ガスを循環可能な極めて高温耐熱性に優れたセラミッ
クス製ファンが必要となるが、このようなファンで長期
使用に耐え得るものは現状においては実用化されていな
い。
[0006] In the case where the auxiliary burner is provided, there is a problem as described above. Therefore, a method of forcibly circulating the high-temperature gas in the furnace and blowing it on the skid mark generating portion may be considered. For this purpose, for example, a ceramic fan having an extremely high heat resistance capable of circulating a high-temperature gas as high as 1300 ° C. is required. However, such a fan that can withstand long-term use is practically used at present. Not.

【0007】そこで、本発明は、補助バーナや超高温耐
熱性ファンを用いることなく、蓄熱再生循環方式を採用
することにより既存の循環ファンを用いて高温ガスをス
キッドマーク発生部に吹き付けることを可能にしたウォ
ーキングビーム式連続加熱炉におけるスキッドマーク除
去装置を提供することを目的とする。
Therefore, according to the present invention, it is possible to blow the high temperature gas to the skid mark generating portion by using the existing circulation fan by adopting the heat storage regeneration circulation system without using the auxiliary burner or the super high temperature heat resistant fan. An object of the present invention is to provide a skid mark removing device for a walking beam type continuous heating furnace.

【0008】[0008]

【課題を解決するための手段】上記目的を達成するため
に本発明は、被加熱材をスキッドビームで支持・搬送し
つつ加熱するウォーキングビーム式連続加熱炉における
スキッドマーク除去装置において、上記被加熱材が上記
スキッドビームと接触する部位近傍に向けた開口部を有
する対をなす高温ガス用ダクトをそれと対応して対をな
す蓄熱器の一端部にそれぞれ連結し、これら対をなす蓄
熱器の他端部を複数の開閉弁または1つの切替弁を介し
て配管により循環ファンの吸引部と排気部とにそれぞれ
接続し、上記開閉弁または切替弁の操作に基づき上記対
をなすダクトの間で炉内高温ガスの吸引と再生高温ガス
の吹き出しを交番的に行うようにしたものである。
In order to achieve the above object, the present invention relates to a skid mark removing device in a walking beam type continuous heating furnace in which a material to be heated is heated while being supported and transported by a skid beam. A pair of hot gas ducts each having an opening directed toward the vicinity of the portion where the material contacts the skid beam are connected to one end of a corresponding pair of regenerators, respectively. The ends are connected to the suction part and the exhaust part of the circulation fan by piping through a plurality of on-off valves or one switching valve, respectively, and a furnace is provided between the pair of ducts based on the operation of the on-off valves or the switching valves. The suction of the high temperature gas and the blowing of the regenerated high temperature gas are alternately performed.

【0009】[0009]

【作用】蓄熱循環方式の一方のダクトの開口部を介して
吸引された炉内高温ガスは、上記ダクトに対応した蓄熱
器を通過する間に熱回収されて低温ガスとなった後、上
記蓄熱器に通じる開閉弁または切替弁を介して循環ファ
ンに送られる。循環ファンによって昇圧された低温ガス
は蓄熱循環方式の他方の開閉弁または上記切替弁を介し
て他方の蓄熱器に送られ、そこで前回の循環動作の際に
回収された蓄熱により加熱されて再生高温ガスとなった
後、他方のダクトの開口部から吹き出されて被加熱材が
上記スキッドビームと接触する部位近傍を局部的に加熱
する。この循環動作を所定時間継続した後、上記開閉弁
または切替弁を操作して、上記他方のダクトから炉内高
温ガスを吸引し上記一方のダクトから再生高温ガスを吹
き出す状態に切り替える。このように高温ガスの循環動
作を交番的に繰り返すことにより、上記被加熱材のスキ
ッドとの接触部位近傍を局部的に加熱し、被加熱材の不
均一加熱を是正する。
The high temperature gas in the furnace sucked through the opening of one duct of the heat storage circulation system is recovered into low temperature gas while passing through the heat accumulator corresponding to the duct, and then the above heat storage It is sent to the circulation fan through an on-off valve or a switching valve that leads to the vessel. The low-temperature gas boosted by the circulation fan is sent to the other heat storage device via the other open / close valve of the heat storage circulation system or the switching valve, where it is heated by the heat storage recovered during the previous circulation operation and regenerated at high temperature. After becoming gas, it is blown out from the opening of the other duct and locally heats the vicinity of the portion where the material to be heated contacts the skid beam. After the circulation operation is continued for a predetermined time, the on-off valve or the switching valve is operated to switch the state in which the in-furnace hot gas is sucked from the other duct and the regenerated hot gas is blown out from the one duct. By alternately repeating the circulation operation of the high-temperature gas in this manner, the vicinity of the contact portion of the heated material with the skid is locally heated, and the uneven heating of the heated material is corrected.

【0010】[0010]

【実施例】以下、添付図面を参照して本発明の実施例に
ついて説明する。図1は本発明にかかるスキッドマーク
除去装置をウォーキングビーム式連続加熱炉に適用した
場合の概略構成を示したものである。
Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a schematic configuration in a case where the skid mark removing apparatus according to the present invention is applied to a walking beam type continuous heating furnace.

【0011】上記ウォーキングビーム式連続加熱炉2に
おいて炉壁3に囲まれた炉内には、耐火物層で被覆され
内部に冷却水が循環する複数の固定スキッドビーム4が
炉長方向に沿って平行に延設されいる。固定スキッドビ
ーム4の上部には、被加熱材Sを支持するためのスキッ
ドボタン5が所定間隔ごとに配設されている。また、固
定スキッドビーム4の間には、この固定スキッドビーム
4と同様の構成を有し上部にスキッドボタン6を取り付
けた可動スキッドビーム7が炉長方向に複数配設され、
各可動スキッドビーム7が炉長方向に沿って間欠的に矩
形運動を繰り返すことにより、被加熱材Sが炉抽出側に
向かって順次搬送されるようになっている。さらに、炉
壁3の下部にはバーナ(図示せず、図6参照)が炉長方
向に所定間隔ごとに配設され、炉内を所定温度に加熱し
ている。
In the walking beam type continuous heating furnace 2, a plurality of fixed skid beams 4, which are covered with a refractory layer and in which cooling water circulates, are provided along a furnace length direction in a furnace surrounded by a furnace wall 3. It extends in parallel. Skid buttons 5 for supporting the material S to be heated are arranged above the fixed skid beam 4 at predetermined intervals. Further, between the fixed skid beams 4, a plurality of movable skid beams 7 having the same configuration as the fixed skid beams 4 and having a skid button 6 mounted thereon are arranged in the furnace length direction,
Each movable skid beam 7 intermittently repeats a rectangular movement along the furnace length direction, so that the material S to be heated is sequentially conveyed toward the furnace extraction side. Further, burners (not shown, see FIG. 6) are arranged at predetermined intervals in the furnace length direction at a lower portion of the furnace wall 3 to heat the inside of the furnace to a predetermined temperature.

【0012】本実施例のスキッドマーク除去装置1は、
炉内で炉幅方向に水平にそれぞれ伸び、先端部12a,
13aが閉塞された対をなす第1ダクト12と第2ダク
ト13を備えている。これらダクト12,13は例えば
セラミック(SiN,SiC等)から構成され、炉床8
に立設した支持台14,15によって適当な位置でそれ
ぞれ支持されている。また、固定スキッドビーム4と可
動スキッドビーム7の間には、ダクト12,13から上
方に向かってそれぞれ分岐して伸びる高温ガス誘導用の
チューブ12b,13bが配置されている。そして、こ
れらチューブ12b,13bの先端開口部が被加熱材S
の下面がスキッドボタン5,6と接触する部位近傍に向
けられている。
The skid mark removing device 1 of the present embodiment is
In the furnace, they extend horizontally in the furnace width direction, and each has a tip 12a,
The first duct 12 and the second duct 13 are provided as a pair in which 13a is closed. These ducts 12 and 13 are made of, for example, ceramics (SiN, SiC, etc.),
Are supported at appropriate positions by support stands 14 and 15 erected at the respective positions. Further, between the fixed skid beam 4 and the movable skid beam 7, tubes 12b and 13b for guiding high-temperature gas, which are branched from ducts 12 and 13 and extend, respectively, are arranged. The opening of the distal end of each of the tubes 12b and 13b is
Is directed to the vicinity of the portion that comes into contact with the skid buttons 5 and 6.

【0013】上記ダクト12,13の炉壁3を貫通して
炉外に伸びた他端部は、第1蓄熱器16および第2蓄熱
器17の一端部にそれぞれ連結されている。これら蓄熱
器16,17は、その内周が断熱材で覆われ、内部には
例えばセラミックボールなどの耐熱性粒状物が充填され
た蓄熱体16a,17aが収容されており、粒状物間の
隙間をガスが通気可能になっている。一方、蓄熱器1
6,17の他端部には、開閉弁20,21を備えた配管
22,23がそれぞれ接続されており、これら配管2
2,23は集合したのち熱交換器24を介して循環ファ
ン25の吸引部25aに接続されている。また、循環フ
ァン25の排気部25bには配管26が接続され、この
配管26は2つの配管27,28に分岐して開閉弁2
9,30を介して蓄熱器16,17の他端部にそれぞれ
接続されている。
The other ends of the ducts 12 and 13 that extend through the furnace wall 3 to the outside of the furnace are connected to one ends of the first regenerator 16 and the second regenerator 17, respectively. These heat accumulators 16 and 17 have their inner circumferences covered with a heat insulating material, and accommodate heat accumulators 16a and 17a filled with heat-resistant granules such as ceramic balls in the interior thereof, and the gaps between the granules The gas can be vented. On the other hand, regenerator 1
The other ends of the pipes 6 and 17 are connected to pipes 22 and 23 having on-off valves 20 and 21 respectively.
After being assembled, the units 2 and 23 are connected to the suction unit 25 a of the circulation fan 25 via the heat exchanger 24. Further, a pipe 26 is connected to an exhaust portion 25b of the circulation fan 25, and the pipe 26 branches into two pipes 27 and 28, and is opened and closed.
They are connected to the other ends of the heat accumulators 16 and 17 via 9, 30 respectively.

【0014】なお、本実施例では蓄熱器16,17を炉
外に設ける構成としたが、これらを炉壁3に組み込むよ
うにしてもよい。また、循環ファン25として、例えば
200℃程度のガス循環に耐え得るものを用いた場合に
は、上記熱交換器24を省略してもよい。
In this embodiment, the regenerators 16 and 17 are provided outside the furnace, but they may be incorporated in the furnace wall 3. When a fan capable of withstanding gas circulation at, for example, about 200 ° C. is used as the circulation fan 25, the heat exchanger 24 may be omitted.

【0015】次に、上記構成からなるスキッドマーク除
去装置1の動作について説明する。まず、電気的または
高圧空気によって開閉する上記開閉弁20,21,2
9,30について、開閉弁20,30を開状態、開閉弁
21,29を閉状態に設定する。この状態で、炉内の例
えば1300℃の高温ガスが、循環ファン25の吸引作
用によって上記チューブ12bから第1ダクト12に吸
引され、第1蓄熱器16に送られる。ここで、高温ガス
は第1蓄熱器16を通過する間に蓄熱体16aに熱回収
されて、200℃程度の低温ガスになる。第1蓄熱器1
6から開閉弁20、配管22を介して熱交換器24に送
られた低温ガスは、ここを通過する間にさらに熱回収さ
れて100℃程度の低温ガスとなり、循環ファン25の
吸引部25aに吸引される。循環ファン25で昇圧され
排気部25bから送り出された低温ガスは、配管26,
28、開閉弁30を介して第2蓄熱器17に流入する。
この第2蓄熱器17の蓄熱体17aは前回の循環動作の
際に蓄熱しているため、低温ガスは蓄熱体17aを通過
する間に加熱され、1200℃程度の再生高温ガスとな
って第2ダクト13に送られる。そして、再生高温ガス
はチューブ13bの先端開口部から吹き出され、被加熱
材Sがスキッドボタン5,6と接触する部位近傍を局部
的に加熱する。
Next, the operation of the skid mark removing apparatus 1 having the above configuration will be described. First, the on-off valves 20, 21, and 22 that are opened and closed by electric or high-pressure air.
For valves 9 and 30, the on-off valves 20 and 30 are set to the open state, and the on-off valves 21 and 29 are set to the closed state. In this state, the high-temperature gas of, for example, 1300 ° C. in the furnace is sucked into the first duct 12 from the tube 12 b by the suction action of the circulation fan 25 and sent to the first regenerator 16. Here, the high temperature gas is heat-recovered by the heat storage body 16a while passing through the first heat storage unit 16, and becomes a low temperature gas of about 200 ° C. 1st heat storage 1
The low-temperature gas sent from 6 to the heat exchanger 24 via the on-off valve 20 and the pipe 22 is further heat-recovered while passing therethrough and becomes a low-temperature gas of about 100 ° C. Sucked. The low-temperature gas pressurized by the circulation fan 25 and sent out from the exhaust part 25b is supplied to the pipe 26,
28, and flows into the second regenerator 17 via the on-off valve 30.
Since the heat storage body 17a of the second heat storage 17 has stored heat during the previous circulation operation, the low-temperature gas is heated while passing through the heat storage body 17a, and becomes a regenerated high-temperature gas of about 1200 ° C. It is sent to the duct 13. Then, the regenerated high-temperature gas is blown out from the tip end opening of the tube 13b, and locally heats the vicinity of the portion where the heated material S contacts the skid buttons 5 and 6.

【0016】上記循環動作をタイマなどで制御して所定
時間(限定的ではないが20秒〜2分程度)継続した
後、今度は図2に示すように、開閉弁20,30を閉状
態、開閉弁21,29を開状態に設定し、上記とは逆方
向の循環動作に移行する。すなわち、1300℃の炉内
高温ガスを第2ダクト13に連通するチューブ13bか
ら吸引し、1200℃程度の再生高温ガスを第1ダクト
12を介してチューブ12b先端の開口部から吹き出
し、被加熱材Sを局部加熱する。この循環動作を所定時
間継続した後、開閉弁20,30を開状態、開閉弁2
1,29を閉状態に設定し、再び図1に示す循環動作に
切り替える。
After the circulation operation is controlled by a timer or the like and continued for a predetermined time (for example, about 20 seconds to 2 minutes, although not limited), the open / close valves 20 and 30 are closed as shown in FIG. The on-off valves 21 and 29 are set to the open state, and the circulation operation in the opposite direction to the above is performed. That is, the high-temperature gas in the furnace at 1300 ° C. is sucked from the tube 13 b communicating with the second duct 13, and the high-temperature regenerated gas at approximately 1200 ° C. is blown out from the opening at the tip of the tube 12 b via the first duct 12 to heat the material to be heated. S is locally heated. After continuing this circulation operation for a predetermined time, the on-off valves 20 and 30 are opened, and the on-off valves 2 and 30 are opened.
1 and 29 are set in the closed state, and the circulation operation shown in FIG. 1 is switched again.

【0017】このように、上記チューブ12b,13b
の間で高温ガスの吸い込みと吹き出しを所定時間ごとに
交番的に繰り返すことにより被加熱材Sの不均一加熱が
是正され、スキッドマークの発生を防止することができ
る。例えば炉内温度1300℃、被加熱材最高温度11
50℃、在炉時間同一の条件で、上記スキッドマーク除
去装置1を適用しないウォーキングビーム式連続加熱炉
で被加熱材Sを加熱した場合、図3に示すように、伝熱
特性の高い被加熱材Sの幅方向両端部a,kと、固定ス
キッドボタン65または可動スキッドボタン66の接触
部位近傍b,d,f,h,jとの温度差は約80℃であ
ったが、上記スキッドマーク除去装置1を適用した場合
には、図4に示すように、被加熱材S全体を1150℃
マイナス20℃程度の範囲内に加熱することができ、圧
延後の製品に悪影響を及ぼさない範囲に温度差を抑える
ことができた。
As described above, the tubes 12b, 13b
By alternately repeating the suction and the blowing of the high temperature gas at predetermined intervals, the non-uniform heating of the material S to be heated can be corrected and the generation of skid marks can be prevented. For example, the temperature inside the furnace is 1300 ° C, the maximum temperature of the material to be heated is 11
When the material S to be heated is heated in a walking beam type continuous heating furnace to which the skid mark removing device 1 is not applied under the same conditions of 50 ° C. and in-furnace time, as shown in FIG. The temperature difference between the widthwise both ends a, k of the material S and the vicinity b, d, f, h, j of the contact point of the fixed skid button 65 or the movable skid button 66 was about 80 ° C. When the removing device 1 is applied, as shown in FIG.
Heating could be performed within a range of about minus 20 ° C., and the temperature difference could be suppressed within a range that did not adversely affect the product after rolling.

【0018】なお、上記スキッドマーク除去装置1は、
蓄熱器の効率の制約に基づき再生高温ガスは炉内ガスよ
り低温になるので、被加熱材Sの加熱温度が再生高温ガ
スの温度より低い帯域に適用するのが好ましい。また、
上記スキッドマーク除去装置1は、ウォーキングビーム
式連続加熱炉2の炉長方向の適宜位置に複数設けるのが
望ましい。
The skid mark removing device 1 is
Since the temperature of the regenerated hot gas is lower than that of the gas in the furnace due to the restriction of the efficiency of the regenerator, it is preferable to apply the regenerated hot gas to a zone where the heating temperature of the material to be heated S is lower than the temperature of the regenerated hot gas. Also,
It is desirable to provide a plurality of the skid mark removing devices 1 at appropriate positions in the furnace length direction of the walking beam type continuous heating furnace 2.

【0019】次に、図5を参照して上記スキッドマーク
除去装置1の変形例について説明する。上記スキッドマ
ーク除去装置1では高温ガスの循環方向の切り替えを4
つの開閉弁20,21,29,30で行うようにした
が、これらの開閉弁に代えて1つの四方弁34を用いて
行ってもよい。この場合、四方弁34の第1ポート35
は配管40を介して第1蓄熱器16に、第2ポート36
は配管41を介して第2蓄熱器17にそれぞれ接続され
ている。また、四方弁34の第3ポート37は熱交換機
24、配管42を介して循環ファン25の吸引部25a
に、第4ポート38は配管43を介して循環ファン25
の排気部25bにそれぞれ接続されている。さらに、四
方弁34内部に回転自在に設けられた回転弁39により
隣接する2つのポートが連通するようになっている。な
お、これら以外の構成は上記スキッドマーク除去装置1
と同様であるため説明を省略する。
Next, a modification of the skid mark removing device 1 will be described with reference to FIG. In the skid mark removing device 1, switching of the circulation direction of the high-temperature gas is performed by four times.
Although the on-off valves 20, 21, 29 and 30 are used, the four on-off valves 34 may be used instead of the on-off valves. In this case, the first port 35 of the four-way valve 34
Is connected to the first heat storage device 16 via the pipe 40 and the second port 36.
Are connected to the second regenerator 17 via a pipe 41, respectively. The third port 37 of the four-way valve 34 is connected to the suction unit 25a of the circulation fan 25 via the heat exchanger 24 and the pipe 42.
The fourth port 38 is connected to the circulation fan 25 through a pipe 43.
, Respectively. Further, a rotary valve 39 rotatably provided inside the four-way valve 34 allows two adjacent ports to communicate with each other. In addition, other configurations are the same as those of the skid mark removing device 1 described above.
The description is omitted because it is the same as.

【0020】以上の構成を有する変形例では、回転弁3
9が実線位置にあるとき、ダクト12を介して炉内高温
ガスが吸引され、ダクト13を介して再生高温ガスが炉
内に吹き出される。この循環状態を所定時間継続した
後、四方弁34の回転弁39をほぼ90°回転させて点
線位置に設定し、上記とは逆方向の循環状態に移行す
る。このような循環動作が回転弁39の回転に基づき所
定時間ごとに交番的に繰り返される。したがって、この
変形例においても上記スキッドマーク除去装置1と同様
の効果を得ることができるほか、切替弁の数削減により
配管や設備メンテナンスが容易になるという効果もあ
る。
In the modified example having the above configuration, the rotary valve 3
When 9 is in the solid line position, the hot gas in the furnace is sucked through the duct 12 and the regenerated hot gas is blown into the furnace through the duct 13. After continuing this circulation state for a predetermined time, the rotary valve 39 of the four-way valve 34 is rotated by about 90 ° to the dotted line position, and the circulation state in the opposite direction to the above is entered. Such a circulating operation is alternately repeated every predetermined time based on the rotation of the rotary valve 39. Therefore, in this modification as well, the same effects as those of the skid mark removing device 1 can be obtained, and there is an effect that maintenance of piping and equipment becomes easy by reducing the number of switching valves.

【0021】[0021]

【発明の効果】以上の説明で明らかなように、本発明の
ウォーキングビーム式連続加熱炉におけるスキッドマー
ク除去装置では、蓄熱再生循環方式により炉内高温ガス
を循環させ、蓄熱器で再生した高温ガスを被加熱材の伝
熱特性の低い部分に吹き付けて被加熱材の不均一加熱を
是正している。
As is apparent from the above description, in the skid mark removing apparatus in the walking beam type continuous heating furnace according to the present invention, the high temperature gas in the furnace is circulated by the heat storage regeneration circulation system, and the high temperature gas regenerated by the heat storage device is circulated. Is sprayed onto a portion of the material to be heated having a low heat transfer characteristic to correct uneven heating of the material to be heated.

【0022】このため、ウォーキングビーム式連続加熱
炉において被加熱材をほぼ均一に加熱するために要する
在炉時間の短縮を、補助バーナを用いることなく達成す
ることができ、燃料の大幅な節約と生産性の向上を図る
ことができる。また、炉内高温ガスを循環させる構成と
しているので、ダクトは炉内温度に耐え得るだけの耐熱
性を備えていれば足りる。したがって、補助バーナを使
用した場合のように超高温耐熱性のあるチューブが要求
されることがなく、設備の材料選定が容易になるととも
に装置の耐久性が向上する。
[0022] For this reason, in the walking beam type continuous heating furnace, shortening of the furnace time required for heating the material to be heated substantially uniformly can be achieved without using an auxiliary burner. Productivity can be improved. In addition, since the high-temperature gas in the furnace is circulated, the duct only needs to have heat resistance enough to withstand the temperature in the furnace. Therefore, unlike the case where the auxiliary burner is used, a tube having heat resistance at an ultrahigh temperature is not required, which facilitates selection of material for equipment and improves durability of the apparatus.

【0023】さらに、炉内高温ガスの循環に蓄熱再生方
式を採用したことにより、高温耐熱性の高い循環ファン
や開閉弁は必要なく既存の安価な循環ファン、開閉弁等
を使用して高温ガス循環が可能になった。加えて、補助
バーナを用いた場合のように炉内に新たな酸素を供給す
ることがないので、被加熱材のスケールロスが増加する
こともない。
Further, by adopting a heat storage regeneration system for circulating the high-temperature gas in the furnace, a high-temperature heat-resistant circulating fan or an on-off valve is not required, and an existing inexpensive circulating fan or on-off valve is used. Circulation is now possible. In addition, since no new oxygen is supplied into the furnace as in the case of using the auxiliary burner, the scale loss of the material to be heated does not increase.

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

【図1】 本発明にかかる実施例のウォーキングビーム
式連続加熱炉におけるスキッドマーク除去装置の概略構
成と、炉内ガスの循環状態を説明する図である。
FIG. 1 is a diagram illustrating a schematic configuration of a skid mark removing device in a walking beam type continuous heating furnace according to an embodiment of the present invention and a state of circulation of gas in the furnace.

【図2】 図1の循環方向とは逆方向の炉内ガスの循環
状態を説明する図である。
FIG. 2 is a diagram illustrating a state of circulation of gas in the furnace in a direction opposite to the circulation direction of FIG.

【図3】 上記スキッドマーク除去装置を適用しない場
合における被加熱材の加熱状態を示すグラフである。
FIG. 3 is a graph showing a heating state of a material to be heated when the skid mark removing device is not applied.

【図4】 上記スキッドマーク除去装置を適用した場合
における被加熱材の加熱状態を示すグラフである。
FIG. 4 is a graph showing a heating state of a material to be heated when the skid mark removing device is applied.

【図5】 上記スキッドマーク除去装置の変形例を示す
部分構成図である。
FIG. 5 is a partial configuration diagram showing a modified example of the skid mark removing device.

【図6】 ウォーキングビーム式連続加熱炉の一般構成
を説明する炉幅方向断面図である。
FIG. 6 is a cross-sectional view in the furnace width direction illustrating a general configuration of a walking beam type continuous heating furnace.

【符号の説明】[Explanation of symbols]

1…スキッドマーク除去装置、2…ウォーキングビーム
式連続加熱炉、4…固定スキッドビーム、5,6…スキ
ッドボタン、7…可動スキッドビーム、12…第1ダク
ト、13…第2ダクト、16…第1蓄熱器、17…第2
蓄熱器、20,21,29,30…開閉弁、25…循環
ファン、34…四方弁(切替弁)
DESCRIPTION OF SYMBOLS 1 ... Skid mark removal apparatus, 2 ... Walking beam type continuous heating furnace, 4 ... Fixed skid beam, 5, 6 ... Skid button, 7 ... Movable skid beam, 12 ... 1st duct, 13 ... 2nd duct, 16 ... No. 1 heat storage, 17 ... second
Regenerator, 20, 21, 29, 30 ... open / close valve, 25 ... circulation fan, 34 ... four-way valve (switching valve)

───────────────────────────────────────────────────── フロントページの続き (72)発明者 嶋田 利生 大阪府大阪市西区京町堀2丁目4番7号 中外炉工業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Shimada 2-4-7 Kyomachibori, Nishi-ku, Osaka City, Osaka Prefecture Chugai Furnace Industry Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 被加熱材をスキッドビームで支持・搬送
しつつ加熱するウォーキングビーム式連続加熱炉におけ
るスキッドマーク除去装置において、 上記被加熱材が上記スキッドビームと接触する部位近傍
に向けた開口部を有する対をなす高温ガス用ダクトをそ
れと対応して対をなす蓄熱器の一端部にそれぞれ連結
し、これら対をなす蓄熱器の他端部を複数の開閉弁また
は1つの切替弁を介して配管により循環ファンの吸引部
と排気部とにそれぞれ接続し、上記開閉弁または切替弁
の操作に基づき上記対をなすダクトの間で炉内高温ガス
の吸引と再生高温ガスの吹き出しを交番的に行うように
したことを特徴とするウォーキングビーム式連続加熱炉
におけるスキッドマーク除去装置。
1. A skid mark removing device in a walking beam type continuous heating furnace for heating a material to be heated while supporting and transporting the material to be heated by a skid beam, wherein an opening is formed near a portion where the material to be heated contacts the skid beam. And a pair of hot gas ducts each having a pair are respectively connected to one ends of the paired regenerators, and the other ends of the paired regenerators are connected via a plurality of on-off valves or one switching valve. Connected to the suction part and the exhaust part of the circulation fan by piping, respectively, alternating the suction of the hot gas in the furnace and the blowing of the regenerated hot gas between the pair of ducts based on the operation of the on-off valve or the switching valve. A skid mark removal device in a walking beam type continuous heating furnace, which is characterized in that it is performed.
JP6242771A 1994-10-06 1994-10-06 Skid mark removal device in walking beam type continuous heating furnace Expired - Fee Related JP2656002B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6242771A JP2656002B2 (en) 1994-10-06 1994-10-06 Skid mark removal device in walking beam type continuous heating furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6242771A JP2656002B2 (en) 1994-10-06 1994-10-06 Skid mark removal device in walking beam type continuous heating furnace

Publications (2)

Publication Number Publication Date
JPH08104918A true JPH08104918A (en) 1996-04-23
JP2656002B2 JP2656002B2 (en) 1997-09-24

Family

ID=17094041

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6242771A Expired - Fee Related JP2656002B2 (en) 1994-10-06 1994-10-06 Skid mark removal device in walking beam type continuous heating furnace

Country Status (1)

Country Link
JP (1) JP2656002B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108517396A (en) * 2018-04-26 2018-09-11 许国华 A kind of stepping heated type aluminium bar stove

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS563743A (en) * 1979-06-22 1981-01-16 Keisuke Shimizu Building board
JPS5879402A (en) * 1981-11-06 1983-05-13 Japanese National Railways<Jnr> Controller for electric motor vehicle
JPS6038658U (en) * 1983-08-19 1985-03-18 日本碍子株式会社 Ladle for molten metal
JPS63109113A (en) * 1986-10-24 1988-05-13 Nippon Steel Corp Heating device in heating furnace

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS563743A (en) * 1979-06-22 1981-01-16 Keisuke Shimizu Building board
JPS5879402A (en) * 1981-11-06 1983-05-13 Japanese National Railways<Jnr> Controller for electric motor vehicle
JPS6038658U (en) * 1983-08-19 1985-03-18 日本碍子株式会社 Ladle for molten metal
JPS63109113A (en) * 1986-10-24 1988-05-13 Nippon Steel Corp Heating device in heating furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108517396A (en) * 2018-04-26 2018-09-11 许国华 A kind of stepping heated type aluminium bar stove

Also Published As

Publication number Publication date
JP2656002B2 (en) 1997-09-24

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