JP2002226862A - Method for observing and repairing combustion chamber of coke oven - Google Patents
Method for observing and repairing combustion chamber of coke ovenInfo
- Publication number
- JP2002226862A JP2002226862A JP2001031163A JP2001031163A JP2002226862A JP 2002226862 A JP2002226862 A JP 2002226862A JP 2001031163 A JP2001031163 A JP 2001031163A JP 2001031163 A JP2001031163 A JP 2001031163A JP 2002226862 A JP2002226862 A JP 2002226862A
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- Prior art keywords
- repair
- lance
- combustion chamber
- image
- observation
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、コークス炉の燃焼
室の壁面を観察して得られた目地切れや亀裂等の欠損部
を補修するコークス炉の燃焼室の観察補修方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for observing and repairing a combustion chamber of a coke oven for repairing a defect such as a joint break or a crack obtained by observing a wall surface of the combustion chamber of the coke oven.
【０００２】[0002]
【従来の技術】従来、コークス炉は、複数の炭化室を設
けており、各炭化室を挟んで両側に燃焼室が配置され、
全体を耐火煉瓦で築造している。しかも、国内に設置さ
れたコークス炉は、その殆どが３０〜４０年以上稼働し
ており、加熱と冷却を繰り返す過激な操業によって、炉
体の劣化が進行している。特に、耐火煉瓦の目地切れや
亀裂の発生が多く、炭化室からのガス洩れによって黒煙
が発生して環境上に支障になったり、燃焼室の燃焼排ガ
スが炭化室に流入して乾留したコークスの品質の低下等
の問題がある。この対策として、特公平５−１７２７７
号公報に記載されているように、テレビカメラと観察窓
を備えた観察装置と、プラズマ等の溶射ガンを内蔵した
補修装置とを用い、亀裂や目地切れ部をテレビカメラで
観察すると同時に、亀裂や目地切れ部に溶射ガンから溶
射材を吹き付けて補修を行うことが行われている。更
に、特開平７−２３４０７５号公報に記載されているよ
うに、冷却筒内にテレビカメラと観察窓を設けて壁面を
観察し、テレビカメラによって得られた撮像画像を基
に、補修位置及び補修パターンを演算により決定する演
算手段を用い、補修部位を区画化処理しておき、これ等
の情報を補修機のコントローラーに入力して自動で補修
することが行われている。2. Description of the Related Art Conventionally, a coke oven has a plurality of coking chambers, and combustion chambers are arranged on both sides of each coking chamber.
The whole is built with firebricks. In addition, most of coke ovens installed in Japan have been operating for 30 to 40 years or more, and the furnace body is being deteriorated due to the extreme operation of repeated heating and cooling. In particular, joints and cracks in refractory bricks often occur, and black gas is generated due to gas leakage from the carbonization chamber, which causes environmental problems. There is a problem such as a decrease in the quality of the product. As a countermeasure against this, Tokuhei 5-17277
As described in the publication, a crack and joint break are observed with a television camera using an observation device having a television camera and an observation window, and a repair device having a built-in spray gun such as plasma. Spray material is sprayed from a thermal spray gun to the joints and joints for repair. Further, as described in JP-A-7-234075, a television camera and an observation window are provided in a cooling cylinder to observe a wall surface, and a repair position and a repair position are determined based on a captured image obtained by the television camera. A repair part is partitioned by using a calculation means for determining a pattern by calculation, and information on such a section is input to a controller of the repair machine to perform repair automatically.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、特公平
５−１７２７７号公報に記載された方法では、テレビカ
メラで亀裂や目地切れ等の欠損部を観察すると共に、こ
の欠損部を見ながら溶射ガンから溶射材を吹き付けるた
め、観察窓近傍の粉塵濃度が高くなり、視界が阻害さ
れ、正確な観察と補修を行うことが困難になる。しか
も、観察窓近傍の粉塵がテレビカメラのレンズや光学器
に疵を与えたり、付着する等から観察、補修装置の寿命
が低下する。更に、特開平７−２３４０７５号公報に記
載された方法では、輝度の変化の大きい燃焼室の壁面を
テレビカメラによって撮像した目地切れや亀裂等の欠損
部の画像を処理するため、目地切れや亀裂等の欠損部を
正確に判別し難く、誤検出が増加し易くなり、実体に応
じた補修を行うことができないと言う重大な欠点があ
る。また、補修部位を区画化して自動補修するため、欠
損部の形状の変化が大きい場合では、補修パターンによ
って適正な補修を行うことができず、補修時間が延長
し、補修材の使用量が増加し、補修コストの上昇を招く
等の問題がある。However, according to the method described in Japanese Patent Publication No. 5-17277, a defect such as a crack or a break in a joint is observed with a television camera, and a spray gun is used while observing the defect. Since the spray material is sprayed, the dust concentration in the vicinity of the observation window becomes high, the visibility is hindered, and it becomes difficult to perform accurate observation and repair. In addition, the dust near the observation window scratches or adheres to the lens or optical device of the television camera, and the life of the observation and repair device is reduced. Furthermore, in the method described in Japanese Patent Application Laid-Open No. Hei 7-234075, the image of a defective portion such as a break or a crack obtained by imaging the wall surface of a combustion chamber having a large change in luminance with a television camera is processed. There is a serious drawback that it is difficult to accurately determine a defective part such as the like, erroneous detection tends to increase, and repair according to the entity cannot be performed. In addition, since the repair site is divided into sections and automatically repaired, if the shape of the defective part changes greatly, the repair pattern cannot be properly repaired, the repair time is extended, and the amount of repair material used increases However, there are problems such as an increase in repair costs.
【０００４】本発明はかかる事情に鑑みてなされたもの
で、目地切れや亀裂に応じて適正な補修を行ない補修効
率を向上し、補修コストを低減し、コークス炉の寿命の
延長を可能にするコークス炉の燃焼室の観察補修方法を
提供することを目的とする。[0004] The present invention has been made in view of the above circumstances, to improve the repair efficiency by performing appropriate repair according to joint breakage or cracks, to reduce the repair cost, and to extend the life of the coke oven. An object of the present invention is to provide a method for observing and repairing a combustion chamber of a coke oven.
【０００５】[0005]
【課題を解決するための手段】前記目的に沿う本発明の
コークス炉の燃焼室の観察補修方法は、コークス炉の燃
焼室に観察ランスを挿入して、該燃焼室の壁面を前記観
察ランスにより撮像して得られた欠陥部画像をモニター
に静止画像で表示しておき、前記壁面の欠陥部の位置に
補修ランスを挿入し、該補修ランスを操作して耐火材を
吹き付けた軌跡を前記モニターの欠陥部画像に重ねて該
欠陥部画像を前記吹き付け軌跡で塗り潰しながら補修を
行う。この方法により、オペレータが欠陥部画像を直接
に見ることにより、補修すべき壁面（耐火壁面）の目地
切れや亀裂等の欠陥部を正確に把握することができ、欠
陥部に補修ランスを容易に位置合わせできる。更に、補
修ランスから耐火材を吹き付けた補修の軌跡を、この欠
陥部画像の上に描きながら、欠陥部の全体を補修するの
で、逐次、補修状態を把握し、的確に欠陥部の補修を行
うことができる。According to the present invention, there is provided a method for observing and repairing a combustion chamber of a coke oven according to the present invention, wherein an observation lance is inserted into the combustion chamber of the coke oven, and the wall surface of the combustion chamber is moved by the observation lance. The image of the defective portion obtained by imaging is displayed as a still image on a monitor, a repair lance is inserted at the position of the defective portion on the wall surface, and the locus of refractory material sprayed by operating the repair lance is displayed on the monitor. The repair is performed while overlapping the defective portion image with the spray locus over the defective portion image. According to this method, the operator can directly grasp the defective portion such as a joint or crack of the wall to be repaired (fireproof wall surface) by directly viewing the defective portion image, and the repair lance can be easily attached to the defective portion. Can be aligned. Furthermore, since the entire defect is repaired while drawing the trajectory of the repair by spraying the refractory material from the repair lance on the image of the defective part, the repair state is sequentially grasped and the defective part is repaired accurately. be able to.
【０００６】ここで、前記壁面に等間隔の格子目を仮定
して前記モニターの静止画像に描き、前記格子目の数か
ら撮像された前記欠陥部の大きさを決定し、前記欠陥部
の補修の要否を判定することが好ましい。これにより、
ＣＣＤカメラで欠陥部を撮像してモニターに表示した欠
陥部画像に、壁面に仮定して描いた格子目を表示してい
るので、格子目の数から欠陥部の大きさを容易に把握す
ることができ、オペレータが欠陥部の状態を的確に把握
し易く、欠陥部の状態に応じた補修を行うことができ
る。しかも、複雑な演算処理や画像処理等が簡素化さ
れ、迅速な観察を行うことができる。[0006] Here, assuming grids at equal intervals on the wall surface, the monitor is drawn on a still image of the monitor, the size of the defective portion is determined from the number of the grids, and the repair of the defective portion is performed. Is preferably determined. This allows
The image of the defect with the CCD camera and the image of the defect displayed on the monitor display grids assumed on the wall, so that the size of the defect can be easily grasped from the number of grids. This makes it easy for the operator to accurately grasp the state of the defective part, and repairs can be performed according to the state of the defective part. In addition, complicated arithmetic processing, image processing, and the like are simplified, and quick observation can be performed.
【０００７】更に、前記欠陥部の位置を記憶演算装置に
入力しておき、前記補修ランスを前記記憶演算装置に記
憶された欠陥部の位置に合わせてから補修を行うと良
い。欠陥部の位置と補修ランスの位置を記憶演算装置に
記憶させるので、欠陥部の位置は、いつでも繰り返し取
り出して利用でき、補修ランスによる補修状態（位置）
を的確に把握して、容易に位置合わせすることができ、
位置合わせ精度及び作業効率が向上する。Further, it is preferable that the position of the defective portion is input to a storage arithmetic device, and the repair is performed after adjusting the repair lance to the position of the defective portion stored in the storage arithmetic device. Since the position of the defective part and the position of the repair lance are stored in the storage arithmetic unit, the position of the defective part can be repeatedly taken out and used at any time, and the repair state (position) by the repair lance
Can be accurately grasped and aligned easily,
The alignment accuracy and work efficiency are improved.
【０００８】[0008]
【発明の実施の形態】続いて、添付した図面を参照しつ
つ、本発明を具体化した実施の形態につき説明し、本発
明の理解に供する。図１はコークス炉の燃焼室内に観察
ランスを挿入した模式図、図２は本発明の一実施の形態
に係るコークス炉の燃焼室の観察補修方法に用いる観察
補修装置の全体構成図、図３は欠陥部とカメラレンズの
向きの関係を説明する模式図、図４は三次元画像のカメ
ラ映像と二次元座標の関係を説明する模式図、図５はモ
ニターに表示された目地切れ部及び溶射補修の軌跡の説
明図である。図１、図２に示すように、本発明の一実施
の形態に係るコークス炉の燃焼室の観察補修方法に用い
られる観察補修装置１０は、コークス炉のフリュー孔１
１から燃焼室１２内に挿入する観察ランス１３と補修ラ
ンス１４を備えている。観察ランス１３は、多重管から
なる内管に反射ミラー１５と、ＣＣＤカメラ１６及びＣ
ＣＤカメラ１６で撮像した画像を送信する信号ケーブル
１７と、観察ランス１３の全体を旋回する旋回装置１８
を有し、燃焼室１２の壁面１２ａを矢印方向に観察でき
るようにしている。更に、観察ランス１３の上方には、
ランスヘッド１９を設けており、冷却水や冷却気体等を
多重管の内部に供給し、反射ミラー１５やＣＣＤカメラ
１６を冷却するようにしている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. FIG. 1 is a schematic diagram in which an observation lance is inserted into a combustion chamber of a coke oven. FIG. 2 is an overall configuration diagram of an observation and repair apparatus used in an observation and repair method for a combustion chamber of a coke oven according to one embodiment of the present invention. FIG. 4 is a schematic diagram illustrating the relationship between the defective portion and the orientation of the camera lens, FIG. 4 is a schematic diagram illustrating the relationship between the camera image of a three-dimensional image and two-dimensional coordinates, and FIG. 5 is a joint break and a thermal spray displayed on a monitor. It is explanatory drawing of the locus | trajectory of a repair. As shown in FIGS. 1 and 2, an observation and repair apparatus 10 used in an observation and repair method for a combustion chamber of a coke oven according to an embodiment of the present invention includes a flue hole 1 of a coke oven.
1 is provided with an observation lance 13 and a repair lance 14 to be inserted into the combustion chamber 12. The observation lance 13 includes a reflection mirror 15, a CCD camera 16 and a C
A signal cable 17 for transmitting an image captured by the CD camera 16 and a turning device 18 for turning the entire observation lance 13
So that the wall surface 12a of the combustion chamber 12 can be observed in the direction of the arrow. Furthermore, above the observation lance 13,
A lance head 19 is provided to supply cooling water, cooling gas, and the like to the inside of the multi-tube to cool the reflection mirror 15 and the CCD camera 16.
【０００９】補修ランス１４は、先端に耐火材の一例で
ある溶射材の吹き付けノズル２０と、全体を旋回する旋
回装置２１と、溶射材と溶射ガスを供給するランスヘッ
ド２２を設けている。これ等観察ランス１３及び補修ラ
ンス１４は、図示しないコークス炉の長手方向及び幅方
向に走行する台車に取付けられた昇降装置を介して、昇
降自在に保持されている。更に、観察ランス１３によっ
て撮像された欠陥部画像及び撮像条件（カメラ角度
等）、その時の壁面１２ａに対応する座標等を送信ケー
ブル１７から送信して入力する記憶演算装置２４と、こ
の記憶演算装置２４からの欠陥部の座標情報を受信して
補修ランス１４の動作を制御するランス駆動制御装置２
３を設けている。また、ランス駆動制御装置２３には、
画像表示用のモニター２５に表示された欠陥部画像に基
づいて、オペレータが操作するランス操作装置２６及び
溶射操作装置２７を備えている。The repair lance 14 is provided at its tip with a spray nozzle 20 for spraying a thermal spray material, which is an example of a refractory material, a swivel device 21 for rotating the whole, and a lance head 22 for supplying the thermal spray material and the thermal spray gas. The observation lance 13 and the repair lance 14 are held so as to be able to move up and down via a lifting device attached to a bogie that runs in the longitudinal direction and the width direction of the coke oven (not shown). Further, a storage operation device 24 for transmitting and inputting a defect image picked up by the observation lance 13 and imaging conditions (camera angle and the like), coordinates corresponding to the wall surface 12a at that time from the transmission cable 17, and the storage operation device 24 Lance drive control device 2 that receives the coordinate information of the defective portion from the lance 24 and controls the operation of the repair lance 14
3 are provided. In addition, the lance drive control device 23 includes:
A lance operating device 26 and a thermal spraying operating device 27 operated by an operator are provided based on the defective portion image displayed on the image display monitor 25.
【００１０】次に、本発明の一実施の形態に係る観察補
修装置１０を用いたコークス炉の燃焼室の観察補修方法
について説明する。観察を行いたい燃焼室１２のフリュ
ー孔１１の中心に、観察ランス１３を移動して位置を合
わせ、その後、昇降装置により観察ランス１３を下降さ
せてフリュー孔１１から縦５３５ｍｍ、横３５３ｍｍ、
高さ５ｍの直方体からなる燃焼室１２内に挿入する。そ
して、旋回装置１８を作動して０〜１８０°の範囲で観
察ランス１３を旋回させて、燃焼室１２の壁面１２ａを
観察し、反射ミラー１５から得られた壁面１２ａの状態
をＣＣＤカメラ１６で撮像し、下降（あるいは昇降）と
旋回を繰り返しながら、壁面１２ａの全体を観察する。
この観察ランス１３を用いた観察は、燃焼室１２が直方
体の角筒状であるため、対象までの距離が変化したり、
コーナ部近傍を斜視するため、モニター２５に表示され
る欠陥部画像によって欠陥部の大きさ等を判定すること
ができない。更に、画面上に等間隔の格子目（目盛り）
を表示して、この目盛りを基準にして、観察して得られ
た欠陥部画像から欠陥部の大きさや形状を判別しようと
した場合では、画面上の等間隔の格子目が実際の欠陥部
と合わなくなり、実際の欠陥部と異なるいわゆる誤差を
生じることになる。従って、画面上で正確に補修すべき
欠陥部の大きさを定量的に判別する方法としては、壁面
１２ａの表面上で等間隔に仮定して設けた格子目を画面
上でも等間隔になるように、ＣＣＤカメラ１６で撮像し
た際の条件を基に目盛りの補正を行うことが必要にな
る。この補正は、壁面１２ａの平面上の任意の点を、カ
メラ角度や壁面１２ａを撮像した時のＣＣＤカメラ１６
の視点距離（反射ミラー１５の中央からの距離）を用
い、画像上の位置に変換して補正し、多数の各点を同様
に補正して得られた目盛りを画面上に表示し、この目盛
りと対比して欠陥部の大きさを把握する。Next, a description will be given of an observation and repair method for a combustion chamber of a coke oven using the observation and repair apparatus 10 according to one embodiment of the present invention. The observation lance 13 is moved and aligned with the center of the flue hole 11 of the combustion chamber 12 to be observed, and then the observation lance 13 is lowered by the elevating device, and 535 mm long, 353 mm wide,
It is inserted into a combustion chamber 12 made of a rectangular parallelepiped having a height of 5 m. Then, the turning device 18 is operated to turn the observation lance 13 in the range of 0 to 180 °, observe the wall surface 12a of the combustion chamber 12, and use the CCD camera 16 to check the state of the wall surface 12a obtained from the reflection mirror 15. The entire wall surface 12a is observed while imaging and repeating the descending (or ascending and descending) and turning.
In the observation using the observation lance 13, since the combustion chamber 12 has a rectangular parallelepiped rectangular tube shape, the distance to the target changes,
Since the vicinity of the corner is oblique, the size and the like of the defect cannot be determined based on the defect image displayed on the monitor 25. Furthermore, grids (scales) at equal intervals on the screen
When the size and shape of the defective portion are determined from the image of the defective portion obtained by observation with reference to this scale, the grids at regular intervals on the screen are the same as the actual defective portion. This will cause a so-called error different from the actual defective portion. Therefore, as a method of quantitatively determining the size of a defective portion to be repaired accurately on the screen, grids provided on the surface of the wall surface 12a assuming equal intervals are arranged at equal intervals on the screen. In addition, it is necessary to correct the scale based on the conditions at the time of imaging with the CCD camera 16. This correction is performed by setting an arbitrary point on the plane of the wall surface 12a with the camera angle and the CCD camera 16 when the wall surface 12a is imaged.
Using the viewpoint distance (distance from the center of the reflection mirror 15), the position is converted to a position on the image and corrected, and a scale obtained by similarly correcting many points is displayed on a screen. The size of the defective part is grasped in comparison with the above.
【００１１】具体的な補正については、まず、観察して
撮像した時の画像の中央点に当たる壁面１２ａ上の点に
原点（Ｘｒ0 、Ｙｒ0 ）を置き、画像上の横方向をＸ
軸、上下方向をＹ軸に取り、この壁面１２ａの平面上の
任意の座標を（Ｘ0 、Ｙ0 ）とする。次に図３に示すよ
うに、ＣＣＤカメラ１６（反射ミラー１５の中央）に三
次元座標の原点（Ｘ0 、Ｙ0 、Ｚ0 ）を置き、観察方向
をＺ軸、観察ランス１３の軸心方向をＹ軸、及び各々
Ｙ、Ｚ座標軸に垂直な方向をＸ軸に取った三次元座標を
とり、壁面１２ａ上の二次元座標上の任意の点Ｒ（Ｘ
ｒ、Ｙｒ）を前述の三次元座標系における座標に変換す
る演算を行う。即ち、壁面１２ａ上の二次元座標上の任
意の点Ｒ（Ｘｒ、Ｙｒ）における三次元系での位置関係
によって、三次元座標でのＸ軸座標は、壁面１２ａの平
面の法線方向と観察方向すなわち三次元座標でのＺ軸と
のなす角度δが燃焼室１２の構造及び撮像時の旋回角度
によって既知であり、且つ、ＣＣＤカメラ１６すなわち
三次元座標の原点（Ｘ0 、Ｙ0 、Ｚ0 ）から炉壁１２ａ
までの法線距離Ｌが燃焼室１２の構造及び撮像時の旋回
角度により既知であるので、壁面１２ａの二次元座標上
の任意の点Ｒ（Ｘｒ、Ｙｒ）と、前述の角度δ、Ｌ値を
用いて演算することによって、壁面１２ａの任意の点Ｒ
の三次元座標での座標（Ｘ、Ｙ、Ｚ）を求めることがで
きる。また、三次元座標での任意の点のＹ軸座標は、壁
面１２ａの二次元座標のＹ軸座標そのものである。三次
元座標での任意の点のＺ軸座標は、前述の既知の値であ
るδ、Ｌ値から演算して求めることができる。For specific correction, first, the origin (Xr 0 , Yr 0 ) is placed at a point on the wall surface 12a, which is the center point of the image when observed and picked up, and the horizontal direction on the image is X
The axis and the vertical direction are taken as the Y axis, and arbitrary coordinates on the plane of the wall surface 12a are defined as (X 0 , Y 0 ). Next, as shown in FIG. 3, the origin (X 0 , Y 0 , Z 0 ) of the three-dimensional coordinates is placed on the CCD camera 16 (center of the reflection mirror 15), the observation direction is the Z axis, and the axis of the observation lance 13 is the axis. The three-dimensional coordinates are obtained by taking the direction as the Y axis and the directions perpendicular to the Y and Z coordinate axes as the X axis, and obtain an arbitrary point R (X
(r, Yr) is converted into coordinates in the above-described three-dimensional coordinate system. That is, according to the positional relationship in the three-dimensional system at an arbitrary point R (Xr, Yr) on the two-dimensional coordinates on the wall surface 12a, the X-axis coordinates in the three-dimensional coordinates are different from the normal direction of the plane of the wall surface 12a. The direction, that is, the angle δ with the Z-axis in three-dimensional coordinates is known from the structure of the combustion chamber 12 and the turning angle at the time of imaging, and the CCD camera 16, that is, the origin (X 0 , Y 0 , Z 0 ) from the furnace wall 12a
Is known from the structure of the combustion chamber 12 and the swiveling angle at the time of imaging, so that an arbitrary point R (Xr, Yr) on the two-dimensional coordinates of the wall surface 12a and the aforementioned angle δ, L value , An arbitrary point R on the wall surface 12a can be calculated.
In three-dimensional coordinates (X, Y, Z) can be obtained. The Y-axis coordinate of an arbitrary point in the three-dimensional coordinates is the Y-axis coordinate itself of the two-dimensional coordinates of the wall surface 12a. The Z-axis coordinates of an arbitrary point in the three-dimensional coordinates can be obtained by calculating from the known values δ and L.
【００１２】このようにして、炉壁１２ａ上の二次元座
標の任意の点Ｒ（Ｘｒ、Ｙｒ）より、三次元座標上の座
標値（Ｘ、Ｙ、Ｚ）として下式により求めることができ
る。 Ｘ＝Ｘｒ×ｃｏｓδ ・・・・・ （１） Ｙ＝Ｙｒ ・・・・・ （２） Ｚ＝Ｌ／ｃｏｓδ＋Ｘｒ×ｓｉｎδ ・・・・・ （３） こうして求めた三次元座標をモニターの画像上の二次元
座標（Ｘ′、Ｙ′）に変換するために、図４に示すよう
に、二次元座標系として、画像中心に原点を取り、水平
方向にＸ軸、垂直方向にＹ軸をとり、下記式の演算を行
うことにより求めることができる。 Ｘ′＝ｋ×Ｘ／Ｚ ・・・・・ （４） Ｙ′＝ｋ×Ｙ／Ｚ ・・・・・ （５） ここで、ｋは、ＣＣＤカメラのレンズの倍率及び撮像素
子の大きさ等からきまる係数であり、例えば、ＣＣＤカ
メラのレンズ特性値から見たＸ′軸に関するｋは、−１
〜１、Ｙ′軸に関するｋで−０．７５〜０．７５とする
ことができる。In this manner, from an arbitrary point R (Xr, Yr) of the two-dimensional coordinates on the furnace wall 12a, it can be obtained as a coordinate value (X, Y, Z) on the three-dimensional coordinates by the following equation. . X = Xr × cosδ (1) Y = Yr (2) Z = L / cosδ + Xr × sinδ (3) The three-dimensional coordinates obtained in this manner are displayed on the monitor image. As shown in FIG. 4, in order to convert to the two-dimensional coordinates (X ′, Y ′), the origin is set at the center of the image, the X-axis is set in the horizontal direction, and the Y-axis is set in the vertical direction. , Can be obtained by calculating the following equation. X ′ = k × X / Z (4) Y ′ = k × Y / Z (5) where k is the magnification of the lens of the CCD camera and the size of the image sensor. For example, k regarding the X ′ axis viewed from the lens characteristic value of the CCD camera is −1.
−1, k in the Y ′ axis can be −0.75 to 0.75.
【００１３】以上の演算を行って、例えば炉壁１２ａ上
に５ｍｍピッチの等間隔の格子目の交点を記憶演算装置
２４によって画像上の座標に変換し、画像上に重ねて表
示することにより、画像の５ｍｍピッチの間隔（目盛
り）を基準にして、欠陥部画像と目盛りを対比して見る
ことによって、実際の欠陥部の大きさや形状を把握する
ことができ、正確に補修すべき対象を判定することがで
きる。更に、５ｍｍピッチの画像の例えば輪郭線上の点
の中で隣り合った点どうしを結んだ線分を表示するよう
にすれば、目盛り状の表示となり、補修すべき対象の大
きさや形状の把握がより容易になる。このように、欠陥
部を撮像してＣＣＤカメラ１６から信号ケーブル１７を
介して欠陥部の画像情報を得ると共に、欠陥部の撮像時
の観察ランス１３の旋回角度と昇降距離を記憶演算装置
２４に記録する。そして、観察ランス１３による観察を
終了し、観察ランス１３を燃焼室１２から上昇させて、
燃焼室１２外に移動する。By performing the above calculations, for example, the intersections of the grids at equal intervals of 5 mm pitch on the furnace wall 12a are converted into coordinates on the image by the storage operation device 24 and displayed on the image in a superimposed manner. The size and shape of the actual defective part can be grasped by comparing the defective part image and the scale based on the interval (scale) of the image at a pitch of 5 mm, and accurately determine the target to be repaired. can do. Further, if a line segment connecting adjacent points among points on a contour line of an image of a 5 mm pitch is displayed, a scale-like display is provided, and the size and shape of the object to be repaired can be grasped. It will be easier. As described above, the image of the defective portion is obtained, the image information of the defective portion is obtained from the CCD camera 16 via the signal cable 17, and the turning angle and the elevating distance of the observation lance 13 at the time of imaging the defective portion are stored in the storage arithmetic device 24. Record. Then, the observation by the observation lance 13 is completed, the observation lance 13 is raised from the combustion chamber 12, and
It moves out of the combustion chamber 12.
【００１４】次に、補修ランス１４を燃焼室１２のフリ
ュー孔１１の中心に移動して位置合わせを行う。オペレ
ータは、ランス操作装置２６の操作スイッチを操作し
て、観察ランス１３と同様に補修ランス１４を燃焼室１
２のフリュー孔１１の中心に移動して位置合わせをし、
その後、補修ランス１４を下降させてフリュー孔１１か
ら燃焼室１２内に挿入する。そして、旋回装置２１を作
動して０〜１８０°の範囲で補修ランス１４を旋回させ
て、モニター２６の画像上に表示された欠陥部画像の例
えば上端位置に、補修ランス１４の吹き付けノズル２０
の位置を合わせる。補修ランス１４の壁面１２ａへの向
け先位置についても、同様にして、壁面上座標より画像
上での二次元座標に先に述べた手順で求めることができ
る。この変換された二次元座標の座標値を基に、現在の
補修ランス１４の補修ランス１４の壁面１２ａへの向け
先位置を観察時に撮像して表示した二次元座標の画像上
に重畳表示する。この表示を見ながら、補修を行いたい
画像上の位置に補修ランス１４を合わせる。Next, the repair lance 14 is moved to the center of the flue hole 11 of the combustion chamber 12 for positioning. The operator operates the operation switch of the lance operating device 26 to connect the repair lance 14 to the combustion chamber 1 in the same manner as the observation lance 13.
Move to the center of 2 flew hole 11 for positioning,
Thereafter, the repair lance 14 is lowered and inserted into the combustion chamber 12 through the flue hole 11. Then, the turning device 21 is operated to turn the repair lance 14 in the range of 0 to 180 °, and the spray nozzle 20 of the repair lance 14 is placed at, for example, the upper end position of the defective portion image displayed on the image of the monitor 26.
Adjust the position of. The destination position of the repair lance 14 toward the wall surface 12a can be similarly obtained from the coordinates on the wall surface to the two-dimensional coordinates on the image according to the procedure described above. Based on the converted coordinate values of the two-dimensional coordinates, the current destination position of the repair lance 14 toward the wall surface 12a of the repair lance 14 is superimposed and displayed on the image of the two-dimensional coordinates captured and displayed during observation. While looking at this display, the repair lance 14 is adjusted to the position on the image to be repaired.
【００１５】この二次元座標変換された座標を用いるこ
とにより、欠陥部の位置に補修ランス１４を正確に合わ
せることができる。補修ランス１４の位置が決定した
ら、溶射材の吹き付け厚み、吹き付け幅等を予め実験し
て求めておき、この結果から得られた複数の溶射補修パ
ターンを設定した溶射操作装置２７の溶射補修パターン
選択し、操作を行って補修ランス１４を下降しながら溶
射補修を行う。即ち、図５に示すように、モニター２５
に表示された壁面１２ａの炉壁レンガ２８に発生した欠
陥部の一例である例えば目地切れ部２９が撮像角度やカ
メラ特性等をそのまま反映した画像で表示されている。
この目地切れ部２９は、モニター２５の右方向になるに
つれてＣＣＤカメラ１６の角度が大きくなって距離も長
くなり、炉壁レンガ２８が小さく見える画像であり、壁
面１２ａに等間隔で描いた格子目３１の間隔も右方向に
なるにつれて間隔が小さく見える。しかし、格子目３１
の正規の間隔が５ｍｍであるので、この格子数と対比し
て見ることにより、目地切れ部２９の大きさを正確に把
握できる。By using the coordinates converted into the two-dimensional coordinates, the repair lance 14 can be accurately adjusted to the position of the defective portion. When the position of the repair lance 14 is determined, the spray thickness, spray width, etc. of the spray material are determined in advance by experiments, and the spray repair pattern selection of the spray operation device 27 in which a plurality of spray repair patterns obtained from the results is set. Then, the spraying repair is performed while lowering the repair lance 14 by performing the operation. That is, as shown in FIG.
For example, a joint cutout 29, which is an example of a defective portion generated in the furnace wall brick 28 of the wall surface 12a shown in FIG.
The joint cutout portion 29 is an image in which the angle of the CCD camera 16 increases and the distance increases as the position becomes rightward of the monitor 25, and the furnace wall brick 28 looks small. The spacing of 31 also appears to be smaller as going to the right. However, grid 31
Is 5 mm, the size of the joint cutout portion 29 can be accurately grasped by comparing it with the number of grids.
【００１６】そして、目地切れ部２９のＡ′点の位置に
補修ランス１４を合わせ、同時に、溶射操作装置２７を
操作して溶射が開始されてＡ点まで移動して溶射補修軌
跡３０のように補修する。この補修ランス１４の移動
（下降）に伴う耐火材を溶射して補修した溶射補修軌跡
３０をモニター２５に表示された静止画像の目地切れ部
２９に上書きし、目地切れ部２９の塗り潰しを行い、順
次、補修ランス１４の操作を行って、目地切れ部２９の
全てを塗り潰すまで補修を行う。この補修は、補修時に
実際に見ることができない目地切れ部２９をモニター２
５の画面で見ながら補修ランス１４で補修でき、しか
も、補修の仕上がり状態をリアルタイムで把握すること
ができ、補修精度の向上、補修耐火材コストの低減、作
業効率の向上を図ることができる。更に、画面の欠陥部
画像をオペレータが直接に見ることができるので、欠陥
部が適正に補修されたか否かの判定を的確に行うことが
でき、誤検出を防止することができる。補修を終了した
補修ランス１４は、ランス操作装置２６のスイッチをオ
ペレータが操作して、燃焼室１２内から上昇して系外に
待機する。Then, the repair lance 14 is adjusted to the position of the point A 'of the joint cutout 29, and at the same time, the thermal spraying operation device 27 is operated to start the thermal spraying and moves to the point A, as shown in the thermal spray repair locus 30. To repair. The spray repair trajectory 30 sprayed and repaired with the refractory material accompanying the movement (downward) of the repair lance 14 is overwritten on the joint cutout 29 of the still image displayed on the monitor 25, and the joint cutout 29 is painted. The repair lance 14 is sequentially operated to perform the repair until all the joint cutouts 29 are painted out. In this repair, the joints 29 that cannot be actually seen at the time of repair are monitored by the monitor 2.
The repair lance 14 can be repaired while looking at the screen 5 and the finished state of the repair can be grasped in real time, so that the repair accuracy can be improved, the repair refractory material cost can be reduced, and the work efficiency can be improved. Furthermore, since the image of the defective portion on the screen can be directly viewed by the operator, it can be accurately determined whether or not the defective portion has been properly repaired, and erroneous detection can be prevented. After the repair, the repair lance 14 is raised by the operator of the switch of the lance operating device 26 from within the combustion chamber 12 and stands by outside the system.
【００１７】[0017]
【実施例】次に、コークス炉の燃焼室の観察補修方法の
実施例について説明する。コークス炉の燃焼室の観察ラ
ンスを挿入し、壁面に発生している目地切れ部を撮像し
た画面と、同時に５ｍｍの等間隔の格子目をモニターに
表示した。そして、格子目の間隔（数）から目地切れ部
を目視判断を行い、推定した大きさ幅２０ｍｍ、長さ２
５０ｍｍの目地切れであることが判った。オペレータが
モニターに表示された目地切れ部の上端に溶射材の吹き
付けノズルを備えた補修ランスを位置合わせし、同時
に、補修ランスから溶射材を２０ｋｇ／時間、火炎温度
を１５００℃で溶射しながら、下降速度を１０００ｍｍ
／分にして補修ランスを下降させ、幅１５ｍｍの溶射補
修の軌跡を形成してモニター２６上の目地切れ部に上書
きして塗り潰し、更に、残部の反対側の目地切れ部に対
し、補修ランスを横移動してから上昇させながら同条件
で溶射を行い目地切れ部の全体を塗り潰した。そして、
再度、燃焼室の補修箇所に観察ランスを挿入して補修の
状態を確認した。その結果、目地切れ部は、溶射補修の
軌跡を用いてモニター上に表示された塗り潰しの通りに
溶射補修が行われており、補修効果として十分であっ
た。しかも、欠陥部の補修状況の判定を正確に行うこと
ができ、補修作業能率、補修材の使用コスト等が低減で
きた。これに対し、従来行われているテレビカメラによ
って得られた画像を処理して区画化し、補修位置及び補
修パターンを演算手段によって得られた条件を補修機の
コントローラーに入力して自動で補修を行った。その結
果、欠陥部を正確に判別することができず、誤検出が発
生し、補修箇所の増加となり、補修材の使用コストが上
昇する等の問題があった。Next, an embodiment of a method for observing and repairing a combustion chamber of a coke oven will be described. An observation lance of the combustion chamber of the coke oven was inserted, and a screen image of joint breaks generated on the wall surface and, at the same time, 5 mm grids at equal intervals were displayed on the monitor. Then, from the interval (number) of the grids, a joint break is visually determined, and the estimated size width 20 mm, length 2
It was found that the joint was cut off by 50 mm. The operator positions a repair lance having a spray nozzle for the spray material on the upper end of the joint cutout indicated on the monitor, and simultaneously sprays the spray material from the repair lance at 20 kg / hour and a flame temperature of 1500 ° C. 1000mm descent speed
/ Min, the repair lance is lowered, a trajectory of the thermal spray repair having a width of 15 mm is formed, and the joint cut on the monitor 26 is overwritten and painted over. Thermal spraying was performed under the same conditions while moving up after raising the lateral direction, and the entire joint cutout was painted. And
Again, an observation lance was inserted into the repair area of the combustion chamber to check the repair condition. As a result, the joint breakage was repaired by spraying as indicated by the solid color displayed on the monitor using the trajectory of the spraying repair, which was sufficient as a repair effect. Moreover, the repair status of the defective portion can be accurately determined, and the repair work efficiency, the use cost of the repair material, and the like can be reduced. On the other hand, the image obtained by the conventional TV camera is processed and sectioned, and the repair position and the repair pattern are input to the controller of the repair machine by inputting the conditions obtained by the arithmetic means, and the repair is automatically performed. Was. As a result, a defective portion cannot be accurately determined, erroneous detection occurs, the number of repaired parts increases, and there is a problem that the use cost of the repair material increases.
【００１８】以上、本発明の実施の形態を説明したが、
本発明は、上記した形態に限定されるものでなく、要旨
を逸脱しない条件の変更等は全て本発明の適用範囲であ
る。例えば、壁面の欠陥部と補修ランス１４（吹き付け
ノズル２０）の位置合わせは、欠陥部の観察時に記憶演
算装置２４に入力された観察ランス１３の位置（座標）
を用い、補修ランス１４の下降や旋回角度等を自動で行
うこともできる。更に、燃焼室の壁面の吹き付け補修
は、溶射吹き付けの他に、一般に行われている乾式の耐
火材の吹き付け方法を用いて行うことができる。また、
欠陥部に補修ランスの位置合わせを行う際に、補修ラン
スの吹き付けノズルの部位をモニター上にマーカーで表
示し、モニターに表示された欠陥部画像とマーカーを見
ながら、ランス駆動制御装置を操作することによって欠
陥部とマーカーの位置合わせをして補修を行うことがで
きる。The embodiment of the present invention has been described above.
The present invention is not limited to the above-described embodiment, and all changes in conditions that do not depart from the gist are within the scope of the present invention. For example, the position of the defective portion of the wall surface and the repair lance 14 (the spray nozzle 20) are determined by the position (coordinates) of the observation lance 13 input to the storage arithmetic device 24 when observing the defective portion.
, The lowering of the repair lance 14, the turning angle, and the like can be automatically performed. Further, spray repair of the wall surface of the combustion chamber can be performed by using a commonly used method of spraying a refractory material in addition to spraying. Also,
When aligning the repair lance with the defective part, the location of the spray nozzle of the repair lance is displayed on the monitor with a marker, and the lance drive control device is operated while looking at the defective part image and the marker displayed on the monitor. This makes it possible to perform repair by aligning the defective portion with the marker.
【００１９】[0019]
【発明の効果】請求項１〜３記載のコークス炉の燃焼室
の観察補修方法は、コークス炉の燃焼室に観察ランスを
挿入して、燃焼室の壁面を観察ランスにより撮像して得
られた欠陥部画像をモニターに静止画像で表示してお
き、欠陥部の位置に補修ランスを挿入し、補修ランスを
操作して耐火材を吹き付けた軌跡をモニターに表示され
た欠陥部画像に重ねることにより欠陥部画像を塗り潰し
ながら補修を行うので、目地切れや亀裂に応じて適正な
補修を行なうことができ、補修効率を向上し補修コスト
を低減して、コークス炉の寿命化を図ることができる。The observation and repair method of the combustion chamber of the coke oven according to the first to third aspects is obtained by inserting an observation lance into the combustion chamber of the coke oven and imaging the wall surface of the combustion chamber with the observation lance. By displaying the defective part image as a still image on the monitor, inserting a repair lance at the position of the defective part, operating the repair lance and overlaying the trajectory of spraying refractory material on the defective part image displayed on the monitor Since the repair is performed while filling the defective portion image, appropriate repair can be performed according to joint breaks or cracks, and the repair efficiency can be improved, the repair cost can be reduced, and the life of the coke oven can be extended.
【００２０】特に、請求項２記載のコークス炉の燃焼室
の観察補修方法は、壁面に等間隔の格子目を仮定して描
き、格子目の数から撮像された欠陥部の大きさを決定
し、欠陥部の補修の可否を判定するので、オペレータが
欠陥部の状態を可視化して的確に把握し易くなり、欠陥
部の状態に応じた補修をより確実に行うことができ、安
定して補修効率の向上や補修コストの低減を達成するこ
とができる。In particular, in the method for observing and repairing the combustion chamber of a coke oven according to the second aspect, the size of the defect portion imaged is determined based on the number of grids by drawing the grids at equal intervals on the wall surface. In addition, since it is determined whether or not a defective part can be repaired, the operator can easily visualize and accurately grasp the state of the defective part, and can more reliably perform repairs according to the state of the defective part, and stably repair the defective part. The efficiency can be improved and the repair cost can be reduced.
【００２１】請求項３記載のコークス炉の燃焼室の観察
補修方法は、欠陥部の位置を記憶演算装置に入力してお
き、補修ランスを記憶演算装置に記憶された欠陥部の位
置に合わせてから補修を行うので、位置合わの精度を向
上でき、作業効率をより向上することができる。According to a third aspect of the present invention, in the method for observing and repairing a combustion chamber of a coke oven, the position of a defective portion is input to a storage and calculation device, and the repair lance is adjusted to the position of the defective portion stored in the storage and calculation device. Since the repair is performed from the beginning, the accuracy of the alignment can be improved, and the working efficiency can be further improved.
【図１】コークス炉の燃焼室内に観察ランスを挿入した
模式図である。FIG. 1 is a schematic diagram in which an observation lance is inserted into a combustion chamber of a coke oven.
【図２】本発明の一実施の形態に係るコークス炉の燃焼
室の観察補修方法に用いる観察補修装置の全体構成図で
ある。FIG. 2 is an overall configuration diagram of an observation and repair apparatus used in an observation and repair method for a combustion chamber of a coke oven according to an embodiment of the present invention.
【図３】欠陥部とカメラレンズの向きの関係を説明する
模式図である。FIG. 3 is a schematic diagram illustrating a relationship between a defective portion and a direction of a camera lens.
【図４】三次元画像のカメラ映像と二次元座標の関係を
説明する模式図である。FIG. 4 is a schematic diagram illustrating a relationship between a camera image of a three-dimensional image and two-dimensional coordinates.
【図５】モニターに表示された目地切れ部及び溶射補修
の軌跡の説明図である。FIG. 5 is an explanatory diagram of a joint break and a trajectory of thermal spray repair displayed on a monitor.
１０：観察補修装置、１１：フリュー孔、１２：燃焼
室、１２ａ：壁面、１３：観察ランス、１４：補修ラン
ス、１５：反射ミラー、１６：ＣＣＤカメラ、１７：信
号ケーブル、１８：旋回装置、１９：ランスヘッド、２
０：吹き付けノズル、２１：旋回装置、２２：ランスヘ
ッド、２３：ランス駆動制御装置、２４：記憶演算装
置、２５：モニター、２６：ランス操作装置、２７：溶
射操作装置、２８：炉壁レンガ、２９：目地切れ部、３
０：溶射補修軌跡、３１：格子目10: observation and repair device, 11: flew hole, 12: combustion chamber, 12a: wall surface, 13: observation lance, 14: repair lance, 15: reflection mirror, 16: CCD camera, 17: signal cable, 18: swivel device, 19: Lance head, 2
0: spray nozzle, 21: swivel device, 22: lance head, 23: lance drive control device, 24: memory operation device, 25: monitor, 26: lance operation device, 27: thermal spray operation device, 28: furnace wall brick, 29: Joint break, 3
0: Thermal spray repair track, 31: Grid
フロントページの続き (72)発明者 戸高 和則 福岡県北九州市戸畑区飛幡町１番１号 新 日本製鐵株式会社八幡製鐵所内 (72)発明者 田原 伸一郎 福岡県北九州市戸畑区飛幡町２番２号 ニ ッテツ八幡エンジニアリング株式会社内 Ｆターム(参考） 2G051 AA83 AA90 AB03 AC17 CA04 EA12 EA14 FA01 Continuing from the front page (72) Inventor Kazunori Todaka 1-1, Hibata-cho, Tobata-ku, Kitakyushu-shi, Fukuoka New Nippon Steel Corporation Yawata Works (72) Inventor Shinichiro Tahara No. 2, Tobata-cho, Tobata-ku, Kitakyushu-shi, Fukuoka No. 2 Nitsutsu Yawata Engineering Co., Ltd. F-term (reference) 2G051 AA83 AA90 AB03 AC17 CA04 EA12 EA14 FA01
Claims (3)
して、該燃焼室の壁面を前記観察ランスにより撮像して
得られた欠陥部画像をモニターに静止画像で表示してお
き、前記壁面の欠陥部の位置に補修ランスを挿入し、該
補修ランスを操作して耐火材を吹き付けた軌跡を前記モ
ニターの欠陥部画像に重ねて該欠陥部画像を前記吹き付
け軌跡で塗り潰しながら補修を行うことを特徴とするコ
ークス炉の燃焼室の観察補修方法。1. An observation lance is inserted into a combustion chamber of a coke oven, and a defect image obtained by imaging a wall surface of the combustion chamber with the observation lance is displayed as a still image on a monitor. Inserting a repair lance at the position of the defective part, performing repair while operating the repair lance and superimposing the trajectory of spraying the refractory material on the defective part image of the monitor, and filling the defective part image with the spray trajectory. A method for observing and repairing a combustion chamber of a coke oven characterized by the following.
察補修方法において、前記壁面に等間隔の格子目を仮定
して前記モニターの静止画像に描き、前記格子目の数か
ら撮像された前記欠陥部の大きさを決定し、前記欠陥部
の補修の要否を判定することを特徴とするコークス炉の
燃焼室の観察補修方法。2. A method for observing and repairing a combustion chamber of a coke oven according to claim 1, wherein said wall is assumed to have grids at equal intervals, and is drawn on a still image of said monitor, and imaged from the number of grids. A method for observing and repairing a combustion chamber of a coke oven, comprising determining a size of the defective portion and determining whether or not the defective portion needs to be repaired.
室の観察補修方法において、前記欠陥部の位置を記憶演
算装置に入力しておき、前記補修ランスを前記記憶演算
装置に記憶された欠陥部の位置に合わせてから補修を行
うこと特徴とするコークス炉の燃焼室の観察補修方法。3. The method for observing and repairing a combustion chamber of a coke oven according to claim 1, wherein the position of the defective portion is input to a storage arithmetic device, and the repair lance is stored in the storage arithmetic device. An observation and repair method for a combustion chamber of a coke oven, wherein repair is performed after adjusting the position of the defective portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001031163A JP2002226862A (en) | 2001-02-07 | 2001-02-07 | Method for observing and repairing combustion chamber of coke oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001031163A JP2002226862A (en) | 2001-02-07 | 2001-02-07 | Method for observing and repairing combustion chamber of coke oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002226862A true JP2002226862A (en) | 2002-08-14 |
Family
ID=18895287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001031163A Pending JP2002226862A (en) | 2001-02-07 | 2001-02-07 | Method for observing and repairing combustion chamber of coke oven |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002226862A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008303227A (en) * | 2007-06-05 | 2008-12-18 | Nippon Steel Corp | Hot repairing method for crack in coke oven |
| KR101461570B1 (en) * | 2012-09-05 | 2014-11-13 | 주식회사 포스코 | Monitoring apparatus of combustion chamber and the method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07126637A (en) * | 1993-10-29 | 1995-05-16 | Kawasaki Steel Corp | Mending of furnace wall of coke oven and apparatus therefor |
| JPH07234075A (en) * | 1994-02-21 | 1995-09-05 | Harima Ceramic Co Ltd | Automatic repairing device for high temperature furnace wall |
| JP2000136386A (en) * | 1998-10-30 | 2000-05-16 | Nippon Steel Corp | Apparatus for inspecting and repairing coke oven and method for repairing coke oven |
-
2001
- 2001-02-07 JP JP2001031163A patent/JP2002226862A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07126637A (en) * | 1993-10-29 | 1995-05-16 | Kawasaki Steel Corp | Mending of furnace wall of coke oven and apparatus therefor |
| JPH07234075A (en) * | 1994-02-21 | 1995-09-05 | Harima Ceramic Co Ltd | Automatic repairing device for high temperature furnace wall |
| JP2000136386A (en) * | 1998-10-30 | 2000-05-16 | Nippon Steel Corp | Apparatus for inspecting and repairing coke oven and method for repairing coke oven |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008303227A (en) * | 2007-06-05 | 2008-12-18 | Nippon Steel Corp | Hot repairing method for crack in coke oven |
| KR101461570B1 (en) * | 2012-09-05 | 2014-11-13 | 주식회사 포스코 | Monitoring apparatus of combustion chamber and the method thereof |
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