JPS6316978Y2 - - Google Patents
Info
- Publication number
- JPS6316978Y2 JPS6316978Y2 JP15125981U JP15125981U JPS6316978Y2 JP S6316978 Y2 JPS6316978 Y2 JP S6316978Y2 JP 15125981 U JP15125981 U JP 15125981U JP 15125981 U JP15125981 U JP 15125981U JP S6316978 Y2 JPS6316978 Y2 JP S6316978Y2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- electromagnetic field
- mold
- alternating electromagnetic
- side wall
- 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.)
- Expired
Links
- 230000005672 electromagnetic field Effects 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000009749 continuous casting Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Continuous Casting (AREA)
Description
【考案の詳細な説明】
この考案は連続鋳造機におけるモールド内容鋼
の湯面レベル検出装置にかんする。[Detailed Description of the Invention] This invention relates to a device for detecting the level of molten steel in a mold in a continuous casting machine.
連続鋳造機において、モールド内湯面高さを所
定高さに保持しつつ溶鋼を注湯することは、製品
の品質管理と安定操業を確保する上で必要なこと
である。そのため、従来より種々の湯面レベル検
出装置が使用されている。最近応答性に優れ、そ
の取付が簡単な検出装置として電磁式レベル検出
装置が開発された。 In a continuous casting machine, pouring molten steel while maintaining the level of the molten metal in the mold at a predetermined level is necessary to ensure product quality control and stable operation. Therefore, various types of hot water level detection devices have been used in the past. Recently, an electromagnetic level detection device has been developed as a detection device with excellent responsiveness and easy installation.
その方法は第１図に示すように、発信コイル
１′と受信コイル３′とを、そのコイル向きを同一
として所定の間隔を保持し、モールド２′の側壁
上面に沿つて設置し、発信コイル１′よりモール
ド２′の内壁に向けて交番電磁界φ1′を発生させ
る。この交番電磁界φ1′はモールド２′の内壁銅板
に渦電流i″を誘発させることとなり、この渦電流
i″より発生する２次交番電磁界φ2′を受信コイル
３′がキヤツチし、受信コイルに電圧を誘起させ
る。 As shown in FIG. 1, the method is to install a transmitting coil 1' and a receiving coil 3' along the upper surface of the side wall of a mold 2', keeping the coil orientations the same and maintaining a predetermined interval, and then An alternating electromagnetic field φ 1 ' is generated from 1 ' toward the inner wall of the mold 2'. This alternating electromagnetic field φ 1 ' induces an eddy current i'' on the inner wall copper plate of the mold 2', and this eddy current
Receiving coil 3' catches the secondary alternating electromagnetic field φ 2 ' generated by i'', and induces a voltage in the receiving coil.
そして、前記のモールド２′の内壁銅板に誘発
される渦電流i″の大きさは銅板の広さ、即ち、溶
鋼４′のモールド内での湯面高さに応じて異つて
くるので、受信コイル３′に検出される２次交番
電磁界φ2′も、またこれにより誘起される電圧も
変化することとなる。従つて、電圧の変化量を検
出することにより、湯面の高さの変化を知ること
ができるようになつている。 The magnitude of the eddy current i'' induced in the copper plate on the inner wall of the mold 2' varies depending on the width of the copper plate, that is, the height of the molten steel 4' in the mold. The secondary alternating electromagnetic field φ 2 ' detected in the coil 3' and the voltage induced thereby also change. Therefore, by detecting the amount of change in voltage, the height of the hot water level can be determined. It is now possible to notice changes.
さて、従来装置では受信コイルは発信コイルに
対して、少くとも湯面レベル検出範囲の約２倍の
距離を隔てることが必要とされている。これは受
信コイルが発信コイルの近くにあると、発信コイ
ルより発生する交番電磁界が直接受信コイルを貫
通し、受信コイルに不必要な電圧が誘起され、該
受信コイルが２次交番電磁界よりうる溶鋼湯面検
出に必要な電圧に誤差を生じさせるためである。 Now, in conventional devices, the receiving coil is required to be separated from the transmitting coil by a distance that is at least twice as long as the hot water level detection range. This is because when the receiving coil is close to the transmitting coil, the alternating electromagnetic field generated by the transmitting coil directly passes through the receiving coil, and unnecessary voltage is induced in the receiving coil. This is because it causes an error in the voltage required for detecting the liquid level of molten steel.
また、両コイルを近づけると、湯面レベルが浅
い位置ではよいが、深い位置では湯面レベルの変
位に応じて受信コイルに誘起される電圧の変化量
が小さく、つまり感度がにぶくなるという湯面レ
ベル特性を持つからである。特にこのことはコイ
ル間隔を狭くすると、湯面レベル検出範囲を狭く
しなければならなくなる。 In addition, when both coils are brought close together, it works well at shallow hot water levels, but at deep hot water levels, the amount of change in the voltage induced in the receiving coil in response to the displacement of the hot water level is small, which means that the sensitivity becomes weaker. This is because it has level characteristics. In particular, if the coil spacing is narrowed, the hot water level detection range must be narrowed.
従つて、モールド側壁上でこの間隔がとれない
ビレツト、或いは小型サイズのブルームなどの鋳
込用モールドについては電磁式レベル検出装置が
使用できないと云う問題点があつた。 Therefore, there is a problem in that the electromagnetic level detection device cannot be used for casting molds such as billets or small-sized blooms in which this distance cannot be maintained on the mold side walls.
本考案はかかる問題点を改善するためになされ
たものであつて、発信コイルをモールドを構成す
る一つの側壁の開口端面上に、そのコイル軸方向
が開口端面延在方向と直交するように配置し、前
記発信コイルに対応する受信コイルを前記側壁に
隣接する側壁の開口端面上に、そのコイル軸方向
が開口端面延在方向と直交するように配置したも
のであつて、これによつて受信コイルには発信コ
イルよりの交番電磁界が直接影響することを少く
し、交番電磁界によつてモールド壁面及び溶鋼面
に誘発される渦電流より発生する３次交番電磁界
をキヤツチさせ、溶鋼レベルを検知するようにし
たものである。 The present invention was made to improve this problem, and the transmitter coil is arranged on the open end surface of one side wall constituting the mold so that the coil axis direction is perpendicular to the extending direction of the open end surface. and a receiving coil corresponding to the transmitting coil is arranged on the open end surface of the side wall adjacent to the side wall so that the axial direction of the coil is perpendicular to the extending direction of the opening end surface. The direct influence of the alternating electromagnetic field from the transmitter coil on the coil is reduced, and the tertiary alternating electromagnetic field generated by the eddy current induced on the mold wall surface and molten steel surface by the alternating electromagnetic field is caught, and the molten steel level is reduced. It is designed to detect.
これによつて受信コイルを発信コイルに近づけ
てセツトすることが可能となり、小型サイズのモ
ールドに対しても電磁式レベル検出装置を適用で
きるようになつた。以下図面に示した実施例に基
づいて説明する。 This makes it possible to set the receiving coil close to the transmitting coil, making it possible to apply the electromagnetic level detection device even to small-sized molds. The following will explain the embodiments shown in the drawings.
第２図において、１は発信コイルであつて、モ
ールド２の長辺側の側壁銅板上面に、そのコイル
軸方向が上面延在方向と直交するように固設され
ている。３は受信コイルであつて、発信コイル１
に対して直角となるようモールド２の短辺側の側
壁銅板上に、そのコイル軸方向が上面延在方向と
直交するように設けられている。つまり、受信コ
イル３は発信コイル１より発生する交番電磁界
φ1の接線方向で、しかも発信コイル１と直角と
なる位置に設けられることとなる（第３図参照）。 In FIG. 2, reference numeral 1 denotes a transmitter coil, which is fixed on the upper surface of the side wall copper plate on the longer side of the mold 2 so that the axial direction of the coil is perpendicular to the extending direction of the upper surface. 3 is a receiving coil, and transmitting coil 1
The coil is provided on the side wall copper plate on the shorter side of the mold 2 so that the coil axis direction is perpendicular to the upper surface extension direction. In other words, the receiving coil 3 is disposed in the tangential direction of the alternating electromagnetic field φ 1 generated by the transmitting coil 1 and at a right angle to the transmitting coil 1 (see FIG. 3).
４はモールド２内に注湯される溶鋼、５は発信
コイル１に接続された交流電磁発信器、６は受信
コイル３にキヤツチされる３次交番電磁界φ3を
検知するレベル信号受信器である。 4 is the molten steel poured into the mold 2, 5 is an AC electromagnetic transmitter connected to the transmitting coil 1, and 6 is a level signal receiver that detects the tertiary alternating electromagnetic field φ 3 caught by the receiving coil 3. be.
本考案は以上の通りに構成され、次にその作用
について述べる。発信コイル１は交流電流発信器
５より送られる交流電流を受けて交番電磁界φ1
を発生させる。そして受信コイル３はこの電磁界
φ1内に設置されるが、該電磁界φ1に対して接線
方向に設けられているので、電磁界φ1が受信コ
イル３のコイル内を貫通することが少なくなり、
このため受信コイル３に交番電磁界φ1によつて
直接誘起される電圧は小さくなる。 The present invention is constructed as described above, and its operation will be described next. The transmitting coil 1 receives an alternating current sent from an alternating current transmitter 5 and generates an alternating electromagnetic field φ 1
to occur. The receiving coil 3 is installed within this electromagnetic field φ 1 , but since it is installed in a tangential direction to the electromagnetic field φ 1 , the electromagnetic field φ 1 cannot penetrate through the inside of the receiving coil 3 . becomes less,
Therefore, the voltage directly induced in the receiving coil 3 by the alternating electromagnetic field φ 1 becomes small.
次に、交番電磁界φ1はモールド２の長辺側の
側壁銅板及び溶鋼４面に渦電流ｉ，i1を誘発させ
るが、溶鋼４面には側壁銅板に誘発される渦電流
ｉにより誘起される交番電磁界φによつても渦電
流i1を誘発させる。この両者の渦電流i1により誘
起される２次交番電磁界φ2は、モールド２の短
辺側の側壁銅板に２次渦電流i2を発生させること
となる。そして、この渦電流i2より誘起される３
次交番電磁界φ3の強さが電圧として検出され、
受信コイル３に接続されるレベル信号受信器６に
溶鋼レベルが検知できることとなる。 Next, the alternating electromagnetic field φ 1 induces eddy currents i, i 1 on the sidewall copper plate on the long side of the mold 2 and on the 4th surface of the molten steel, but the eddy current i induced on the sidewall copper plate on the 4th side of the molten steel induces An eddy current i 1 is also induced by the alternating electromagnetic field φ. The secondary alternating electromagnetic field φ 2 induced by these two eddy currents i 1 generates a secondary eddy current i 2 in the side wall copper plate on the short side of the mold 2 . Then, 3 induced by this eddy current i 2
The strength of the alternating electromagnetic field φ 3 is detected as a voltage,
The level signal receiver 6 connected to the receiving coil 3 can detect the molten steel level.
即ち、溶鋼４の湯面が高い位置にあれば３次交
番電磁界φ3は大となり、湯面が低い位置に下が
ると受信コイル３にキヤツチされる電磁界φ3は
小となつて、レベル信号受信器６に溶鋼レベルが
表示される。 In other words, when the level of the molten steel 4 is high, the tertiary alternating electromagnetic field φ 3 becomes large, and when the molten metal level falls to a low position, the electromagnetic field φ 3 caught by the receiving coil 3 becomes small, and the level The molten steel level is displayed on the signal receiver 6.
第４図は本考案と従来型の電磁レベル検出装置
との、コイル間隔によるレベル検出範囲の比較を
示す実施例である。Ａは本考案による実測値、Ｂ
は従来型による実測値であつて、横軸にコイル間
隔Ｄをとり、縦軸にレベル検出範囲Ｃをとつてい
る。 FIG. 4 is an example showing a comparison of the level detection range depending on the coil spacing between the present invention and a conventional electromagnetic level detection device. A is the actual measured value according to the present invention, B
is an actual value measured by a conventional type, with the horizontal axis representing the coil spacing D and the vertical axis representing the level detection range C.
この例によれば、検出範囲120mmにすると（例
えば、モールドの上面から深さ、40mmから160
mm）、本考案によればコイル間隔は145mm程度にで
きるが、従来型では280mm必要である。また、検
出範囲を100mmとしても、従来型のものはコイル
間隔を230mm程度は必要とするが、本考案によれ
ば110mm程度でよいことになる。 According to this example, if the detection range is 120 mm (for example, depth from the top of the mold, 40 mm to 160 mm)
According to the present invention, the coil spacing can be approximately 145 mm, whereas the conventional type requires 280 mm. Furthermore, even if the detection range is 100 mm, the conventional type requires a coil spacing of about 230 mm, but according to the present invention, it is sufficient to have a coil spacing of about 110 mm.
この実験結果からも本考案によればコイル間隔
を近づけ得ることがわかる。尚、コイル間隔Ｄは
従来型では第１図に示すごとく両コイルの軸芯間
距離を、本考案においては第２図に示すごとく発
信コイルの軸芯から受信コイルの前面までの距離
をとつている。 This experimental result also shows that the coil spacing can be made closer according to the present invention. In addition, the coil spacing D is the distance between the axes of both coils in the conventional type as shown in Figure 1, and in the present invention it is the distance from the axis of the transmitting coil to the front of the receiving coil as shown in Figure 2. There is.
本考案は以上詳述したとおり、受信コイルを発
信コイルより発生する交番電磁界の接線方向で、
しかも発信コイルに対して横向きに設けることに
より、両コイルを近接させて設置することが可能
となり、各サイズのモールドに電磁式レベル検出
装置を使用でき、特にこれまで電磁式レベル計の
設置が難しかつた小さいサイズのモールドに対し
ても適切に用いることができると云う効果があ
る。 As detailed above, the present invention moves the receiving coil in the tangential direction of the alternating electromagnetic field generated by the transmitting coil.
Moreover, by installing it horizontally with respect to the transmitter coil, it is possible to install both coils close to each other, and an electromagnetic level detection device can be used for molds of various sizes, making it especially difficult to install an electromagnetic level meter until now. It has the advantage that it can be used appropriately even for small-sized molds.
第１図は従来の電磁式レベル検出装置の斜視
図、第２図は本考案の電磁式レベル検出装置の実
施例を示す斜視図、第３図は発信コイル、受信コ
イルの位置関係を示す概略図、第４図は本考案と
従来型の電磁レベル検出装置との、コイル間隔に
よるレベル検出範囲の比較を示す実験例である。
１……発信コイル、２……モールド、３……受
信コイル、φ1……交番電磁界、φ2……２次交番
電磁界、φ3……３次交番電磁界、ｉ，i1，i2……
渦電流。
Fig. 1 is a perspective view of a conventional electromagnetic level detector, Fig. 2 is a perspective view showing an embodiment of the electromagnetic level detector of the present invention, Fig. 3 is a schematic diagram showing the positional relationship between the transmitter coil and the receiver coil, and Fig. 4 is an experimental example showing a comparison of the level detection range of the present invention and a conventional electromagnetic level detector depending on the coil spacing. 1... transmitter coil, 2... mold, 3... receiver coil, φ1 ... alternating electromagnetic field, φ2 ... secondary alternating electromagnetic field, φ3 ... tertiary alternating electromagnetic field, i, i1 , i2 ...
Eddy currents.
Claims (1)
開口端面上に、そのコイル軸方向が開口端面延在
方向と直交するように配置し、 前記発信コイルに対応する受信コイルを前記側
壁に隣接する側壁の開口端面上に、そのコイル軸
方向が開口端面延在方向と直交するように配置
し、 前記発信コイルから発生する交番電磁界で当該
発信コイルが設けられたモールド側壁面上及び溶
鋼湯面上に渦電流を発生させ、 これらの渦電流で発生される２次交番電磁界で
前記受信コイルの設けられたモールド側壁面上に
２次渦電流を発生させ、 さらに前記受信コイルは前記２次渦電流に起因
する３次交番電磁界レベルを計測するよう構成さ
れたことを特徴とする連続鋳造機における電磁式
レベル検出装置。[Claims for Utility Model Registration] A transmitter coil is disposed on the open end surface of one side wall constituting the mold so that the axial direction of the coil is perpendicular to the extending direction of the open end surface, and a receiver coil corresponding to the transmitter coil. is arranged on the open end surface of the side wall adjacent to the side wall so that the axial direction of the coil is orthogonal to the extending direction of the open end surface, and the alternating electromagnetic field generated from the transmitting coil is applied to the mold side where the transmitting coil is provided. Generate eddy currents on the wall surface and the molten steel surface, generate secondary eddy currents on the side wall surface of the mold where the receiving coil is provided with a secondary alternating electromagnetic field generated by these eddy currents, and further An electromagnetic level detection device for a continuous casting machine, wherein the receiving coil is configured to measure a tertiary alternating electromagnetic field level caused by the secondary eddy current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15125981U JPS5856929U (en) | 1981-10-12 | 1981-10-12 | Electromagnetic level detection device in continuous casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15125981U JPS5856929U (en) | 1981-10-12 | 1981-10-12 | Electromagnetic level detection device in continuous casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5856929U JPS5856929U (en) | 1983-04-18 |
| JPS6316978Y2 true JPS6316978Y2 (en) | 1988-05-13 |
Family
ID=29943950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15125981U Granted JPS5856929U (en) | 1981-10-12 | 1981-10-12 | Electromagnetic level detection device in continuous casting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5856929U (en) |
-
1981
- 1981-10-12 JP JP15125981U patent/JPS5856929U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5856929U (en) | 1983-04-18 |
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