JP2000117406A - Instrument for detecting flow-out of slag - Google Patents
Instrument for detecting flow-out of slagInfo
- Publication number
- JP2000117406A JP2000117406A JP10290298A JP29029898A JP2000117406A JP 2000117406 A JP2000117406 A JP 2000117406A JP 10290298 A JP10290298 A JP 10290298A JP 29029898 A JP29029898 A JP 29029898A JP 2000117406 A JP2000117406 A JP 2000117406A
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- slag
- seal pipe
- air seal
- molten metal
- 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
Links
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、溶融金属とスラ
グが入った容器（例えば取鍋）から、エアシ−ルパイプ
を介して他の容器（例えばタンディッシュ）に溶融金属
を注入する際に、スラグがエアシ−ルパイプを通過して
他の容器に流出するのを検知するスラグ流出検知装置に
関する。BACKGROUND OF THE INVENTION The present invention relates to a method for injecting molten metal from a container (for example, a ladle) containing molten metal and slag into another container (for example, a tundish) through an air seal pipe. The present invention relates to a slag outflow detection device for detecting that a slag flows out of another container through an air seal pipe.
【０００２】[0002]
【従来の技術】転炉で精練された溶鋼は取鍋に移された
後、連続鋳造において、タンディッシュにエアシ−ルパ
イプを介して注湯される。2. Description of the Related Art Molten steel refined in a converter is transferred to a ladle and then poured into a tundish through an air seal pipe in continuous casting.
【０００３】通常、取鍋には溶鋼とともにスラグが入っ
ているため、取鍋からタンディッシュに溶鋼を注入する
際、注湯末期においてスラグが大量にタンディッシュに
流入すると、タンディッシュ内の溶鋼にスラグが混入
し、結果としてスラグが連続鋳造機の鋳型に巻き込ま
れ、連続鋳造された鋳片に内部欠陥として残留すること
になる。[0003] Usually, since slag is contained together with molten steel in the ladle, when the molten steel is poured into the tundish from the ladle, if a large amount of slag flows into the tundish at the end of pouring, the molten steel in the tundish is removed. The slag is mixed, and as a result, the slag is caught in the mold of the continuous casting machine and remains as an internal defect in the continuously cast slab.
【０００４】したがって、タンディッシュ内には極力ス
ラグを流出させないような操業が行われている。[0004] Therefore, an operation is performed so that slag is prevented from flowing into the tundish as much as possible.
【０００５】このようなスラグの取鍋からタンディッシ
ュへの流出を検知する従来の方法としては、特公平７−
４１４０２号公報に開示された技術がある。この技術に
基づくスラグの流出検知方法は、センサを構成する送信
コイルおよび受信コイルにより金属溶湯の流れ断面を包
囲し、複数の周波数を含む電流を送信コイルに印加し、
この電流により受信コイルに電圧を誘導し、周波数を選
択してこの電圧を評価し、この電圧のスペクトル状の複
合経過から流れ断面にわたる導電率分布を求め、それか
ら通過する金属溶湯のスラグの割合と、摩擦により変化
する流れ断面の直径とを求め、溶湯およびセンサの変化
する温度連続または準連続測定を行ない、温度デ−タと
誘導される電圧スペクトルの測定値との理論結合を行な
うものである。As a conventional method for detecting the outflow of slag from a ladle to a tundish, Japanese Patent Publication No.
There is a technique disclosed in Japanese Patent No. 41402. A slag outflow detection method based on this technology encloses a flow cross section of the molten metal by a transmission coil and a reception coil constituting a sensor, and applies a current including a plurality of frequencies to the transmission coil,
This current induces a voltage in the receiving coil, selects a frequency, evaluates this voltage, determines the conductivity distribution over the flow cross section from the spectral composite course of this voltage, and then determines the percentage of slag of the molten metal that passes through it. , The diameter of the flow cross section that changes due to friction, the continuous or quasi-continuous measurement of the molten metal and the sensor, and the theoretical connection between the temperature data and the measured value of the induced voltage spectrum. .
【０００６】また、特公昭６３−１１０９９号公報に開
示されたスラグ混入防止装置による方法もある。この装
置による方法は、エアシ−ルパイプを通過する溶鋼とス
ラグの振動変化を、振動検出個所を介して振動検知手段
により検知する。そして、溶鋼流出末期の溶鋼中のスラ
グの含有量の増加にともない、振動数が所定値より低下
する時点で、制御操作手段の作動により、ノズルの開閉
手段を自動的に閉止し、溶鋼の注入を直ちに停止すると
いうものである。[0006] There is also a method using a slag mixing prevention device disclosed in Japanese Patent Publication No. 63-11099. According to the method using this apparatus, a vibration change of molten steel and slag passing through an air seal pipe is detected by a vibration detecting means via a vibration detecting portion. At the time when the frequency falls below a predetermined value with the increase in the content of slag in the molten steel at the end of molten steel outflow, the control operation means is operated to automatically close the nozzle opening / closing means and to inject the molten steel. Stop immediately.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上述し
た従来のスラグの流出検知方法には、次のような問題点
がある。However, the above-mentioned conventional slag outflow detection method has the following problems.
【０００８】（１）特公平７−４１４０２号公報に開示
されたスラグの流出検知方法 取鍋ノズル取り囲むように検出コイルを設置する必要が
あるので、 取鍋ノズルを改造する必要がある。 使用する取鍋全てに検出コイルを設置する必要があ
る。 検出コイルの設置場所が取鍋内溶湯の流出口であるた
め、検出コイルが高温にさらされて劣化が早い。(1) Method for detecting slag outflow disclosed in Japanese Patent Publication No. Hei 7-41402 Since the detection coil needs to be installed so as to surround the ladle nozzle, the ladle nozzle needs to be modified. It is necessary to install a detection coil in all the ladles used. Since the installation location of the detection coil is the outlet of the molten metal in the ladle, the detection coil is exposed to high temperature and deteriorates quickly.
【０００９】したがって、スラグの流出を検知するため
に、高額な初期投資が必要であるとともに、検出精度を
維持するために、検出コイルの頻繁な取り替えが必要と
なり、保守費が高くなる。Therefore, a large initial investment is required to detect the outflow of the slag, and frequent replacement of the detection coil is required to maintain the detection accuracy, resulting in high maintenance costs.
【００１０】（２）特公昭６３−１１０９９号公報に開
示されたスラグ混入防止装置による方法 振動伝達手段の先端を、ノズル表面に溶接する方式のた
め、ノズルとセンサ部が一体として構成されており、チ
ャ−ジ毎のノズルの移動および数チャ−ジ毎のノズルの
交換時において、センサの取り外し等が必要となるた
め、作業性が悪い。また、ノズルとセンサ部とを容易に
取り外し可能に構成しようとした場合、振動の伝達が十
分に行なわれない可能性がある。(2) Method using a slag mixing prevention device disclosed in Japanese Patent Publication No. 63-11099 The nozzle and the sensor unit are integrally formed because the tip of the vibration transmitting means is welded to the nozzle surface. At the time of moving the nozzle for each charge and replacing the nozzle for every few charges, it is necessary to remove the sensor and the like, so that the workability is poor. In addition, when the nozzle and the sensor unit are configured to be easily detachable, the vibration may not be sufficiently transmitted.
【００１１】この発明は、従来技術の上述のような問題
点を解消するためになされたものであり、初期投資およ
び保守費用が低額で、かつ正確にスラグ流出を検知する
ことができるとともに、ノズルとセンサ部との切り離し
が可能であるためノズル交換時における作業性が阻害さ
れないスラグ流出検知装置を提供することを目的として
いる。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, has a low initial investment and maintenance cost, can accurately detect slag outflow, and has a nozzle. It is an object of the present invention to provide a slag outflow detecting device which can be separated from a sensor and a sensor unit, so that workability at the time of nozzle replacement is not hindered.
【００１２】[0012]
【課題を解決するための手段】この発明に係るスラグ流
出検知装置は、溶融金属とスラグが入った容器から、シ
−ルされた流通管を介して他の容器に前記溶融金属を注
入する際に、前記スラグが前記シ−ルされた流通管を通
過して前記他の容器に流出するのを検知するスラグ流出
検知装置であって、一端が前記シ−ルされた流通管の表
面に接触する棒状の振動伝達手段と、該棒状の振動伝達
手段の他端に取り付けられた振動検知手段と、棒状の振
動伝達手段の中間に設けた振動伝達制御手段とから構成
されるものである。SUMMARY OF THE INVENTION A slag outflow detecting device according to the present invention is used for injecting the molten metal from a container containing the molten metal and the slag into another container through a sealed flow pipe. A slag outflow detecting device for detecting the slag passing through the sealed flow pipe and flowing out to the other container, one end of which contacts a surface of the sealed flow pipe. And a vibration detection means attached to the other end of the rod-shaped vibration transmission means, and a vibration transmission control means provided in the middle of the rod-shaped vibration transmission means.
【００１３】取鍋内の溶湯はシ−ルされた流通管を通っ
て、重力により自由落下して、タンディッシュ内の湯面
に衝突する。この流体衝突により、シ−ルされた流通管
の先端が加振され、シ−ルされた流通管に振動が発生す
る。そして、溶湯に代わってスラグが流出した場合に
は、スラグの比重は溶湯の比重の１／３であるので、そ
の比重差により、流体衝突によって発生するシ−ルされ
た流通管への加振力が低下し、シ−ルされた流通管に発
生する振動強度は、溶湯の場合よりも減少する。The molten metal in the ladle passes through the sealed flow pipe, falls freely by gravity, and collides with the surface of the molten metal in the tundish. Due to this fluid collision, the tip of the sealed flow pipe is vibrated, and vibration is generated in the sealed flow pipe. When the slag flows out instead of the molten metal, the specific gravity of the slag is 1/3 of the specific gravity of the molten metal. The force is reduced, and the vibration intensity generated in the sealed flow pipe is lower than in the case of the molten metal.
【００１４】本発明のスラグ流出検知装置は、シ−ルさ
れた流通管に発生する振動の上述のような強度の変化を
検出して、スラグ流出を検知するものである。そして、
シ−ルされた流通管に発生している振動を検知するため
に、振動検知手段を直接高温のシ−ルされた流通管の表
面に接触させることは難しいので、耐熱性に優れた材料
でできた棒状の振動伝達手段をシ−ルされた流通管の表
面に接触させ、この棒状の振動伝達手段のシ−ルされた
流通管の表面に接触しない方の端部に振動検知手段を取
り付け、振動検知手段の耐熱性を確保しつつ、シ−ルさ
れた流通管の振動を検知するようにしている。The slag outflow detecting device of the present invention detects a slag outflow by detecting a change in the intensity of the vibration generated in the sealed flow pipe as described above. And
In order to detect the vibration occurring in the sealed flow pipe, it is difficult to bring the vibration detecting means directly into contact with the surface of the high-temperature sealed flow pipe. The resulting rod-shaped vibration transmitting means is brought into contact with the surface of the sealed flow pipe, and the vibration detecting means is attached to the end of the rod-shaped vibration transmission means which does not contact the surface of the sealed flow pipe. In addition, the vibration of the sealed flow pipe is detected while ensuring the heat resistance of the vibration detection means.
【００１５】また、シ−ルされた流通管の振動を、振動
伝達手段を介して検知しようとしているので、その伝達
特性の影響を受けて、スラグ流出時の振動変化の検知精
度が悪くなる傾向にある。そこで、振動伝達手段の途中
に、振動伝達手段の伝達特性を制御する振動伝達制御手
段を設け、検知精度の悪化を防いでいる。Further, since the vibration of the sealed flow pipe is to be detected through the vibration transmitting means, the accuracy of detecting the vibration change when the slag flows out tends to deteriorate due to the influence of the transmission characteristics. It is in. Therefore, a vibration transmission control means for controlling the transmission characteristics of the vibration transmission means is provided in the middle of the vibration transmission means to prevent the detection accuracy from deteriorating.
【００１６】本発明のスラグ流出検知装置は、上述した
ような構成となっているため、取鍋を改造する必要もな
く、また全ての取鍋にスラグ流出検知装置を取り付ける
必要もない。Since the slag outflow detecting device of the present invention has the above-described configuration, it is not necessary to modify the ladle, and it is not necessary to attach the slag outflow detecting device to all the ladles.
【００１７】また、振動検知手段の耐熱性が確保されて
いるので、振動検知手段を頻繁に取り替える必要もな
い。Further, since the heat resistance of the vibration detecting means is secured, it is not necessary to frequently replace the vibration detecting means.
【００１８】さらには、シ−ルされた流通管に振動伝達
手段を接触させるだけの構造となっているので、取鍋ノ
ズル交換時に作業性を妨げることはない。Further, since the structure is such that the vibration transmitting means is merely brought into contact with the sealed flow pipe, the workability is not hindered when the ladle nozzle is replaced.
【００１９】[0019]
【発明の実施の形態】本発明の実施の形態を、図面を参
照して説明する。図1は本発明の実施の形態のスラグ流
出検知装置をエアシ−ルパイプに接触させている状態を
示す模式図である。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing a state in which a slag outflow detecting device according to an embodiment of the present invention is in contact with an air seal pipe.
【００２０】図1において、符号１はスラグ流出検知装
置、２は棒状の振動伝達手段、３は振動検知手段、４は
振動伝達制御手段、５は取鍋、６は取鍋５内のスラグ、
７は取鍋５内の溶鋼、８は取鍋ノズル、９はエアシ−ル
パイプ、１０はエアシ−ルパイプ９の支持ア−ム、１１
はタンディッシュ、１２は浸漬ノズル、１３は鋳型であ
る。In FIG. 1, reference numeral 1 is a slag outflow detecting device, 2 is a rod-shaped vibration transmitting means, 3 is a vibration detecting means, 4 is a vibration transmitting control means, 5 is a ladle, 6 is a slag in the ladle 5,
7 is molten steel in the ladle 5, 8 is a ladle nozzle, 9 is an air seal pipe, 10 is an arm for supporting the air seal pipe 9, 11
Denotes a tundish, 12 denotes an immersion nozzle, and 13 denotes a mold.
【００２１】このスラグ流出検知装置１は、一端がエア
シ−ルパイプ９の表面に接触する棒状の振動伝達手段２
と、該棒状の振動伝達手段２の他端に取り付けられた振
動検知手段３と、棒状の振動伝達手段２の中間に設けた
振動伝達制御手段４とから構成されている。The slag outflow detecting device 1 has a rod-shaped vibration transmitting means 2 having one end contacting the surface of the air seal pipe 9.
And a vibration detection means 3 attached to the other end of the rod-shaped vibration transmission means 2 and a vibration transmission control means 4 provided in the middle of the rod-shaped vibration transmission means 2.
【００２２】このスラグ流出検知装置１を使用して、取
鍋５内のスラグ６が、エアシ−ルパイプ９を通ってタン
ディシュ１１に流出するのを検知する方法を説明する
と、次のとおりである。取鍋５内の溶湯７の湯面にはス
ラグ６が浮遊しているが、タンディッシュ１１への注湯
の進行にともない、溶湯５の湯面レベルが一定レベルま
で下がると、取鍋ノズル８の上部に渦が発生し、スラグ
６が溶湯７とともにタンディッシュ１１に流出する。A method of detecting the slag 6 in the ladle 5 flowing out to the tundish 11 through the air seal pipe 9 using the slag outflow detecting device 1 will be described as follows. The slag 6 floats on the surface of the molten metal 7 in the ladle 5, but when the level of the molten metal 5 falls to a certain level as the pouring into the tundish 11 proceeds, the ladle nozzle 8 The slag 6 flows out to the tundish 11 together with the molten metal 7.
【００２３】取鍋５内の溶湯７は、取鍋ノズル８および
エアシ−ルパイプ９を通って、重力により自由落下し
て、タンディッシュ１１内の湯面１１ａに衝突する。こ
の流体衝突により、シ−ルパイプ９の先端が加振され、
エアシ−ルパイプ９に振動が発生する。溶湯７に代わっ
てスラグ６が流出した場合には、スラグ６の比重は溶湯
７の比重の１／３であるので、その比重差により、流体
衝突によって発生するエアシ−ルパイプ９への加振力が
低下し、エアシ−ルパイプ９に発生する振動強度は、溶
湯７の場合よりも減少する。The molten metal 7 in the ladle 5 falls freely by gravity through the ladle nozzle 8 and the air seal pipe 9 and collides with the molten metal surface 11a in the tundish 11. Due to this fluid collision, the tip of the seal pipe 9 is vibrated,
Vibration occurs in the air seal pipe 9. When the slag 6 flows out in place of the molten metal 7, the specific gravity of the slag 6 is ３ of the specific gravity of the molten metal 7. And the vibration intensity generated in the air seal pipe 9 is reduced as compared with the case of the molten metal 7.
【００２４】本発明のスラグ流出検知装置１を使用し
て、スラグ流出を検知するに際しては、エアシ−ルパイ
プ９に発生する振動を、振動伝達手段２を介して振動検
知手段３に伝達し、振動検知手段３からの振動信号を経
時的に受信し、この信号の大きさが大きく変化した場合
に、スラグが流出したと判断するのである。When detecting the slag outflow using the slag outflow detection device 1 of the present invention, the vibration generated in the air seal pipe 9 is transmitted to the vibration detection means 3 through the vibration transmission means 2 and the vibration is transmitted. The vibration signal from the detection means 3 is received over time, and when the magnitude of this signal changes significantly, it is determined that the slag has flowed out.
【００２５】図２はスラグ流出検知装置の具体例を示す
断面図である。このスラグ流出検知装置は、一端２１ａ
が振動計測点となる棒状の振動伝達部材２１と、振動伝
達部材２１の他端部２１ｂに接続した振動センサ−２２
と、振動伝達部材２１の中間部分を支持する円筒状の支
持部材２３と、円筒状の支持部材２３の内部に挿入され
ているバネ２４と、バネ２４を円筒状の支持部材２３の
端面２３ａとの間で圧縮させてバネ２４に付勢力を与え
るストッパ−２５と、円筒状の支持部材２３を固定させ
るための固定部材２６とから構成されている。FIG. 2 is a sectional view showing a specific example of the slag outflow detecting device. This slag outflow detecting device has one end 21a.
Is a rod-shaped vibration transmission member 21 that serves as a vibration measurement point, and a vibration sensor 22 connected to the other end 21 b of the vibration transmission member 21.
A cylindrical support member 23 supporting an intermediate portion of the vibration transmission member 21, a spring 24 inserted inside the cylindrical support member 23, and an end face 23 a of the cylindrical support member 23. And a fixing member 26 for fixing the cylindrical support member 23 by applying a biasing force to the spring 24 by compressing the support member 23 between them.
【００２６】このスラグ流出検知装置にいては、棒状の
振動伝達部材２１の振動計測点２１ａがバネ２４によ
り、常に一定圧力でエアシ−ルパイプ９に押し付けられ
ている状態で、エアシ−ルパイプ９の振動が振動伝達部
材２１を介して伝達され、振動センサ−２２により計測
される。この例では、バネ２４が振動伝達制御手段とな
って、振動伝達手段である棒状の振動伝達部材２１の伝
達特性を制御しているが、振動伝達制御手段はこれに限
るものではなく、例えばダンパ−やダンパ−とバネの組
み合わせ等振動制御を可能とする機械部品の利用が可能
である。In this slag outflow detecting device, the vibration of the air seal pipe 9 is kept in a state where the vibration measuring point 21a of the rod-shaped vibration transmitting member 21 is constantly pressed against the air seal pipe 9 by the spring 24 at a constant pressure. Is transmitted through the vibration transmission member 21 and measured by the vibration sensor 22. In this example, the spring 24 serves as a vibration transmission control unit to control the transmission characteristics of the rod-shaped vibration transmission member 21 as the vibration transmission unit. However, the vibration transmission control unit is not limited to this. It is possible to use mechanical parts that enable vibration control, such as a combination of a damper and a spring with a spring.
【００２７】なお、振動センサ２２における振動制御
は、次のような考え方で行なえばよい。The vibration control in the vibration sensor 22 may be performed based on the following concept.
【００２８】図３の振動モデル図に示すように、棒状の
振動伝達部材２１の振動計測点２１ａが接触しているエ
アシ−ルパイプ９の表面上の点Ａでの振動とほぼ同じ振
動を棒状の振動伝達部材２１の他端部２１ｂで測定する
ためには、まず点Ａにおいて振動伝達部材２１とエアシ
−ルパイプ９が離れない条件として、（１）式が成立し
なければならない。 ｋ・ｌ0／ｍ＞（αA）max……（１） ただし、 ｋ：バネ２４のバネ定数 ｌ0：振動伝達部材をエアシ−ルパイプに押さえ付けた
ときのバネ２４の変位 ｍ：振動伝達部材２１の質量 （αA）max：点Ａにおける最大加速度As shown in the vibration model diagram of FIG. 3, the rod-shaped vibration transmission member 21 has substantially the same vibration as the vibration at the point A on the surface of the air seal pipe 9 with which the vibration measurement point 21a is in contact. In order to measure at the other end 21b of the vibration transmitting member 21, first, the condition (1) must be satisfied as a condition that the vibration transmitting member 21 and the air seal pipe 9 do not separate at the point A. k · l 0 / m> (α A ) max (1) where k: spring constant of the spring 24 l 0 : displacement of the spring 24 when the vibration transmitting member is pressed against the air seal pipe m: vibration transmission Mass of member 21 (α A ) max : maximum acceleration at point A
【００２９】また、振動伝達部材２１が剛体として運動
するためには、振動伝達部材２１自身のバネ定数ｋ′
が、次の（２）式を満足しなければならない。 ｋ′≫ｋ……（２）In order for the vibration transmitting member 21 to move as a rigid body, the spring constant k '
However, the following equation (2) must be satisfied. k'≫k ... (2)
【００３０】さらに、振動伝達部材２１の振動が、エア
シ−ルパイプ９の振動に影響を与えないためには、次の
（３）式および（４）式を満足しなければならない。 ｍ≪Ｍ……（３） ただし、Ｍ：エアシ−ルパイプ９の質量 ｋ≪Ｋ……（４） ただし、Ｋ：スラグ流出検知装置全体のバネ定数Further, in order that the vibration of the vibration transmitting member 21 does not affect the vibration of the air seal pipe 9, the following expressions (3) and (4) must be satisfied. m≪M (3) where M: mass of air seal pipe 9 k≪K (4) where K: spring constant of entire slag outflow detection device
【００３１】これら（１）〜（４）式を満足するよう
に、振動伝達部材２１の質量ｍ、バネ２４のバネ定数ｋ
およびバネ変位ｌ0を決めればよい。The mass m of the vibration transmitting member 21 and the spring constant k of the spring 24 are set so as to satisfy the expressions (1) to (4).
And the spring displacement l 0 may be determined.
【００３２】図４はエアシ−ルパイプ９の支持ア−ム１
０の下面に、上述したスラグ流出検知装置を取り付けた
状態を示す側面図であり、（ａ）はエアシ−ルパイプ９
が支持ア−ム１０で支持され、振動伝達部材２１がエア
シ−ルパイプ９に接触している状態を、（ｂ）はエアシ
−ルパイプ９が支持ア−ム１０で支持されておらず、振
動伝達部材２１がエアシ−ルパイプ９から離れている状
態を示す。この場合には、エアシ−ルパイプ９が支持ア
−ム１０で支持されておれば、必ず振動伝達部材２１が
エアシ−ルパイプ９に接触しているので、支持ア−ム１
０がエアシ−ルパイプ９を支持したまま移動する場合に
も、スラグ流出の検知は可能である。FIG. 4 shows a support arm 1 of the air seal pipe 9.
0 is a side view showing a state in which the above-mentioned slag outflow detection device is attached to the lower surface of the air seal pipe 9;
Are supported by the supporting arm 10 and the vibration transmitting member 21 is in contact with the air seal pipe 9. FIG. 4B shows the state where the air sealing pipe 9 is not supported by the supporting arm 10 and the vibration is transmitted. The state where the member 21 is separated from the air seal pipe 9 is shown. In this case, if the air seal pipe 9 is supported by the support arm 10, the vibration transmitting member 21 is always in contact with the air seal pipe 9, so that the support arm 1
Even when 0 moves while supporting the air seal pipe 9, slag outflow can be detected.
【００３３】図５はエアシ−ルパイプに発生する振動
を、本発明のスラグ流出検知装置に取り付けた振動計で
計測したときの振動伝達特性（点線）と、エアシ−ルパ
イプに直接取り付けた振動計で計測したときの振動伝達
特性（実線）とを示すグラフである。この計測は、実物
大のエアシ−ルパイプに本発明のスラグ流出検知装置に
取り付けた振動伝達部材を接触させ、加振装置で他の振
動計が取り付けられているエアシ−ルパイプを加振させ
る方法で行なった。FIG. 5 shows a vibration transmission characteristic (dotted line) when vibration generated in the air seal pipe is measured by a vibrometer attached to the slag outflow detecting device of the present invention, and a vibration meter directly attached to the air seal pipe. 6 is a graph showing vibration transmission characteristics (solid line) when measured. This measurement is performed by bringing a vibration transmitting member attached to the slag outflow detecting device of the present invention into contact with a full-sized air seal pipe and vibrating an air seal pipe to which another vibrometer is attached with a vibration device. Done.
【００３４】点線および実線で示した曲線とも、測定し
ようとする周波数範囲において、ほぼ同一の特性を示
し、振動伝達部材を介して振動を測定する本発明のスラ
グ流出検知装置が、十分な検知性能を有していることが
分かる。The curves shown by the dotted line and the solid line show almost the same characteristics in the frequency range to be measured, and the slag outflow detecting device of the present invention for measuring vibration through the vibration transmitting member has sufficient detection performance. It can be seen that this has
【００３５】図6は実物大加振実験を行なったときの振
動の減衰曲線を示すグラフであり、（ａ）はエアシ−ル
パイプの減衰曲線を、（ｂ）はエアシ−ルパイプの支持
ア−ムの減衰曲線を示す。FIGS. 6A and 6B are graphs showing a damping curve of vibration when a full-scale vibration experiment is performed. FIG. 6A shows a damping curve of an air seal pipe, and FIG. 6B shows a supporting arm of the air seal pipe. 3 shows the decay curve of the sample.
【００３６】この加振実験においては、エアシ−ルパイ
プを周波数０〜４００Ｈｚでランダム加振し、加振を停
止した後の振動を、エアシ−ルパイプの振動は、エアシ
−ルパイプに直接取り付けた振動計により、支持ア−ム
の振動は、垂直方向の振動が測定できるように支持ア−
ムに取り付けた振動計により測定した。In this vibration experiment, the air seal pipe was randomly vibrated at a frequency of 0 to 400 Hz, the vibration after stopping the vibration, and the vibration of the air seal pipe were measured by a vibrometer directly attached to the air seal pipe. Thus, the vibration of the supporting arm can be measured so that the vertical vibration can be measured.
It was measured by a vibrometer attached to the system.
【００３７】図６から明らかなように、エアシ−ルパイ
プの振動が減衰した後も、支持ア−ムの振動は継続して
いる。そして、このことから、エアシ−ルパイプの支持
ア−ムに振動センサを設置した振動測定では、精度のよ
い振動測定は困難であり、本発明のスラグ流出検知装置
を使用して、エアシ−ルパイプの振動を測定した方が精
度のよい測定ができることが分かる。As is clear from FIG. 6, even after the vibration of the air seal pipe has been attenuated, the vibration of the supporting arm continues. From this, it is difficult to measure the vibration accurately with the vibration measurement in which the vibration sensor is installed on the support arm of the air seal pipe, and the slag outflow detecting device of the present invention is used to measure the vibration of the air seal pipe. It can be seen that more accurate measurement can be obtained by measuring the vibration.
【００３８】また、エアシ−ルパイプの支持ア−ムに発
生する振動は、その支持方法より上下（垂直）方向が主
成分であるため、エアシ−ルパイプの振動測定において
は、本発明のスラグ流出検知装置を使用し、振動センサ
を水平方向に設置して測定するのが有利であることが分
かる。この際、振動センサには支持ア−ムの振動が伝播
してくるが、振動方向が上下方向であるため、水平方向
に取り付けた振動センサにとっては、上下方向の感度が
小さいため、その影響を小さくできるという効果も、合
わせて発揮することができる。The vibration generated in the supporting arm of the air seal pipe is mainly in the vertical direction (vertical direction) due to the supporting method. Therefore, in measuring the vibration of the air seal pipe, the slag outflow detection of the present invention is used. It can be seen that it is advantageous to use the device and place the vibration sensor horizontally to measure. At this time, the vibration of the supporting arm propagates to the vibration sensor, but since the vibration direction is the vertical direction, the sensitivity of the vibration sensor mounted in the horizontal direction is small in the vertical direction. The effect that the size can be reduced can also be exhibited.
【００３９】図7はスラグ流出時の振動の減衰率を示す
グラフであり、（ａ）は本発明のスラグ流出検知装置を
使用してエアシ−ルパイプの振動を測定した場合、
（ｂ）は、支持ア−ムの振動を支持ア−ムに取り付けた
振動計で測定した場合（従来法）である。FIG. 7 is a graph showing the damping rate of the vibration when the slag flows out. FIG. 7A shows the case where the vibration of the air seal pipe is measured using the slag outflow detecting device of the present invention.
(B) is a case where the vibration of the supporting arm is measured by a vibrometer attached to the supporting arm (conventional method).
【００４０】スラグ流出時の振動減衰率が従来法では５
２％であったのに比較し、本発明のスラグ流出検知装置
を使用した測定方法では７５％となり、スラグ流出を精
度よく測定することが可能となった。The vibration damping rate at the time of slag outflow is 5 in the conventional method.
Compared to 2%, the measurement method using the slag outflow detecting device of the present invention was 75%, and it was possible to accurately measure the slag outflow.
【００４１】[0041]
【実施例】図２に示すスラグ流出検知装置を用いて、連
続鋳造設備におけるスラグ流出検知テストを、１１０チ
ャ−ジを対象として行なった。検知性能を比較するため
に、エアシ−ルパイプ９の支持ア−ム１０に振動センサ
−を設置した場合の検知テストも合わせて行なった。こ
の場合、支持ア−ム１０が振動伝達手段として機能する
が、振動伝達制御手段がない装置でスラグ流出を検知す
る場合に匹敵する。EXAMPLE Using a slag outflow detecting device shown in FIG. 2, a slag outflow detection test in a continuous casting facility was performed for 110 chargers. In order to compare the detection performance, a detection test in which a vibration sensor was installed on the support arm 10 of the air seal pipe 9 was also performed. In this case, the support arm 10 functions as a vibration transmitting means, but this is equivalent to a case where the slag outflow is detected by a device having no vibration transmitting control means.
【００４２】さらには、スラグ流出時に、タンディッシ
ュ１１側の湯面１１ａに浮いてくるスラグを、オペレ−
タが目視で検知する方法も同時に行なった。そして、オ
ペレ−タが目視で検知したタイミングを基準として、本
発明のスラグ流出検知装置やエアシ−ルパイプ９の支持
ア−ム１０に振動センサ−を設置した場合の検知性能を
評価した。Further, when the slag flows out, the slag floating on the surface 11a of the tundish 11 is removed from the
At the same time, the method of visual inspection by the operator was performed. The detection performance of the slag outflow detection device of the present invention and the detection performance when a vibration sensor was installed on the support arm 10 of the air seal pipe 9 was evaluated based on the timing visually detected by the operator.
【００４３】その結果、本発明のスラグ流出検知装置に
よる検知は、オペレ−タの検知タイミングに対して平均
で５．２秒早く、エアシ−ルパイプ９の支持ア−ム１０
に振動センサ−を設置した場合の検知は、オペレ−タの
検知タイミングに対して平均で２．１秒早かった。As a result, the detection by the slag outflow detecting device of the present invention is 5.2 seconds earlier on average than the detection timing of the operator, and the supporting arm 10 of the air seal pipe 9 is detected.
The detection when the vibration sensor was installed was 2.1 seconds earlier on average than the detection timing of the operator.
【００４４】また、検知率も本発明のスラグ流出検知装
置による検知率は１００％、エアシ−ルパイプ９の支持
ア−ム１０に振動センサ−を設置した場合の検知率は７
０％であり、本発明のスラグ流出検知装置を使用すれ
ば、早いタイミングで１００％スラグの流出を把握する
ことができ、タンディッシュへのスラグの流出を最小限
にすることができるということが分かった。The detection rate of the slag outflow detecting device of the present invention is 100%, and the detection rate when the vibration sensor is installed on the supporting arm 10 of the air seal pipe 9 is 7%.
0%, and the use of the slag outflow detection device of the present invention makes it possible to grasp the outflow of 100% slag at an early timing and minimize the outflow of slag to the tundish. Do you get it.
【００４５】[0045]
【発明の効果】この発明により、オペレ−タの目視検知
に比較してスラグ流出の検知タイミングが早くなり、タ
ンディッシュへのスラグ流出量を減少させることができ
るので、鋳造製品の品質を向上させることができる。According to the present invention, the timing of detecting the outflow of slag is earlier than the visual detection of the operator, and the amount of outflow of slag to the tundish can be reduced, thereby improving the quality of the cast product. be able to.
【００４６】また、電磁式スラグ流出検知装置に比較し
て、初期投資や保守費用の低減が可能になった。Further, as compared with the electromagnetic slag outflow detecting device, the initial investment and the maintenance cost can be reduced.
【００４７】また、エアシ−ルパイプに振動伝達手段を
接触させるだけの構造となっているので、取鍋ノズル交
換時に作業性を妨げることはない。Further, since the structure is such that the vibration transmitting means is merely brought into contact with the air seal pipe, the workability is not hindered when the ladle nozzle is replaced.
【図１】本発明の実施の形態のスラグ流出検知装置をエ
アシ−ルパイプに接触させている状態を示す模式図であ
る。FIG. 1 is a schematic diagram showing a state in which a slag outflow detecting device according to an embodiment of the present invention is in contact with an air seal pipe.
【図２】スラグ流出検知装置の具体例を示す断面図であ
る。FIG. 2 is a sectional view showing a specific example of a slag outflow detecting device.
【図３】振動制御を行なうときの振動モデル図である。FIG. 3 is a vibration model diagram when performing vibration control.
【図４】エアシ−ルパイプの支持ア−ムの下面にたスラ
グ流出検知装置を取り付けた状態を示す側面図であり、
（ａ）はエアシ−ルパイプが支持ア−ムで支持され、振
動伝達部材がシ−ルパイプに接触している状態を、
（ｂ）はエアシ−ルパイプが支持ア−ムで支持されてお
らず、振動伝達部材がエアシ−ルパイプから離れている
状態を示す。FIG. 4 is a side view showing a state in which a slag outflow detecting device is attached to a lower surface of a support arm of the air seal pipe;
(A) shows a state in which the air seal pipe is supported by the support arm and the vibration transmitting member is in contact with the seal pipe.
(B) shows a state where the air seal pipe is not supported by the support arm and the vibration transmitting member is separated from the air seal pipe.
【図５】本発明のスラグ流出検知装置に取り付けた振動
計で計測したときの振動伝達特性と、エアシ−ルパイプ
に直接取り付けた振動計で計測したときの振動伝達特性
とを示すグラフである。FIG. 5 is a graph showing a vibration transmission characteristic measured by a vibration meter attached to the slag outflow detecting device of the present invention and a vibration transmission characteristic measured by a vibration meter directly attached to an air seal pipe.
【図６】実物大加振実験を行なったときの振動の減衰曲
線を示すグラフであり、（ａ）はエアシ−ルパイプの減
衰曲線を、（ｂ）はエアシ−ルパイプの支持ア−ムの減
衰曲線を示す。6A and 6B are graphs showing a damping curve of vibration when a full-scale vibration experiment is performed, wherein FIG. 6A is a damping curve of an air seal pipe, and FIG. 6B is a damping of a support arm of the air seal pipe. The curve is shown.
【図７】スラグ流出時の振動の減衰率を示すグラフであ
り、（ａ）は本発明のスラグ流出検知装置を使用してエ
アシ−ルパイプの振動を測定した場合、（ｂ）は、支持
ア−ムの振動を支持ア−ムに取り付けた振動計で測定し
た場合である。FIGS. 7A and 7B are graphs showing a damping rate of vibration at the time of slag outflow. FIG. 7A shows a case where the vibration of the air seal pipe is measured using the slag outflow detecting device of the present invention, and FIG. -The vibration of the arm was measured by a vibrometer attached to the supporting arm.
１ スラグ流出検知装置 ２ 振動伝達手段 ３ 振動検知手段 ４ 振動伝達制御手段 ２１ 振動伝達部材 ２２ 振動センサ− ２３ 支持部材 ２４ バネ ２５ ストッパ− ２６ 固定部材 DESCRIPTION OF SYMBOLS 1 Slag outflow detection apparatus 2 Vibration transmission means 3 Vibration detection means 4 Vibration transmission control means 21 Vibration transmission member 22 Vibration sensor-23 Support member 24 Spring 25 Stopper-26 Fixing member
───────────────────────────────────────────────────── フロントページの続き (72)発明者 明智 吉弘 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 Ｆターム(参考） 4E004 MB19 PA10 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yoshihiro Akechi 1-2-1 Marunouchi, Chiyoda-ku, Tokyo F-term in Nihon Kokan Co., Ltd. 4E004 MB19 PA10
Claims (1)
−ルされた流通管を介して他の容器に前記溶融金属を注
湯する際に、前記スラグが前記シ−ルされた流通管を通
過して前記他の容器に流出するのを検知するスラグ流出
検知装置であって、一端が前記シ−ルされた流通管の表
面に接触する棒状の振動伝達手段と、該棒状の振動伝達
手段の他端に取り付けられた振動検知手段と、棒状の振
動伝達手段の中間に設けた振動伝達制御手段とから構成
されることを特徴とするスラグ流出検知装置。When a molten metal is poured from a container containing molten metal and slag into another container through a sealed flow pipe, the slag is filled with the flow pipe. A slag outflow detecting device for detecting flow out of the slag to the other container after passing through, the rod-shaped vibration transmission means having one end contacting the surface of the sealed flow pipe, and the rod-shaped vibration transmission A slag outflow detection device comprising: a vibration detection means attached to the other end of the means; and a vibration transmission control means provided between the rod-shaped vibration transmission means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29029898A JP3603620B2 (en) | 1998-10-13 | 1998-10-13 | Slag outflow detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29029898A JP3603620B2 (en) | 1998-10-13 | 1998-10-13 | Slag outflow detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000117406A true JP2000117406A (en) | 2000-04-25 |
| JP3603620B2 JP3603620B2 (en) | 2004-12-22 |
Family
ID=17754328
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29029898A Expired - Fee Related JP3603620B2 (en) | 1998-10-13 | 1998-10-13 | Slag outflow detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3603620B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105382914A (en) * | 2015-11-18 | 2016-03-09 | 安徽云天冶金科技股份有限公司 | Using method for positioning vibration table for floating plug guiding bar pouring |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105382915B (en) * | 2015-11-18 | 2017-07-11 | 安徽云天冶金科技股份有限公司 | A kind of vibration production method of floating plug guide rod |
-
1998
- 1998-10-13 JP JP29029898A patent/JP3603620B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105382914A (en) * | 2015-11-18 | 2016-03-09 | 安徽云天冶金科技股份有限公司 | Using method for positioning vibration table for floating plug guiding bar pouring |
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| Publication number | Publication date |
|---|---|
| JP3603620B2 (en) | 2004-12-22 |
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