JPH11193451A - High frequency electromagnet for levitating molten metal, and levitating pot provided with the electromagnet - Google Patents
High frequency electromagnet for levitating molten metal, and levitating pot provided with the electromagnetInfo
- Publication number
- JPH11193451A JPH11193451A JP10000095A JP9598A JPH11193451A JP H11193451 A JPH11193451 A JP H11193451A JP 10000095 A JP10000095 A JP 10000095A JP 9598 A JP9598 A JP 9598A JP H11193451 A JPH11193451 A JP H11193451A
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- hot
- electromagnet
- opening
- frequency electromagnet
- 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
- Coating With Molten Metal (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は溶融金属浮上用高周
波電磁石及びこの高周波電磁石を備えた空中ポットに関
し、空中ポットを使用する鋼帯の溶融めっき設備に適用
して有用なものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency electromagnet for levitation of molten metal and an aerial pot provided with the high-frequency electromagnet, and is useful when applied to a hot-dip plating facility for a steel strip using the aerial pot.
【０００２】[0002]
【従来の技術】通常、鋼帯の連続溶融めっき設備は、還
元焼鈍炉で表面活性化された鋼帯を溶融めっき浴に浸漬
し、シンクロールを周回させ、溶融めっき浴から垂直上
方に鋼帯を引き上げている。シンクロールは、溶融めっ
き浴に浸漬された状態で回転駆動されるが、溶融めっき
金属による腐食が激しく、頻繁に補修・交換をすること
が要求される。2. Description of the Related Art In general, a continuous hot-dip steel plating apparatus for steel strip is provided by immersing a steel strip surface-activated in a reduction annealing furnace in a hot-dip plating bath, rotating a sink roll, and vertically moving the steel strip from the hot-dip plating bath. Has been raised. The sink roll is driven to rotate while being immersed in a hot-dip plating bath, but is severely corroded by hot-dip metal, and requires frequent repair and replacement.
【０００３】還元焼鈍炉から溶融めっき浴に導入された
鋼帯の走行方向を変更するため、鋼帯表面と接触した状
態でシンクロールが回転する。このため、シンクロール
との接触不良に起因した擦り疵が鋼帯表面に発生するの
は避けられず、このことが鋼帯表面に形成されるめっき
層に悪影響を及ぼす。しかも、シンクロールによって鋼
帯に曲げが付与されるため、シンクロールを通過した後
の鋼帯に板幅方向の反りが発生し易くなる。この板幅方
向の反りは、溶融めっき浴から引き上げられた鋼帯をガ
スワイピングする際にワイピングノズルと鋼帯表面との
距離を変動させることを必要とし、結果として不均一ワ
イピングにより板幅方向に関するめっき付着量にバラツ
キが発生し易くなる。[0003] In order to change the running direction of the steel strip introduced from the reduction annealing furnace into the hot-dip plating bath, the sink roll rotates in contact with the steel strip surface. Therefore, it is inevitable that scratches due to poor contact with the sink roll occur on the surface of the steel strip, which adversely affects the plating layer formed on the surface of the steel strip. In addition, since the steel strip is bent by the sink roll, the steel strip after passing through the sink roll is likely to be warped in the plate width direction. This warpage in the strip width direction requires changing the distance between the wiping nozzle and the steel strip surface when gas wiping the steel strip pulled up from the hot-dip plating bath, and as a result, the non-uniform wiping causes a change in the strip width direction. Variations in the amount of plating are likely to occur.
【０００４】更に、溶融めっき浴にシンクロールが浸漬
されることから、大容量の溶融めっき槽が必要とされ、
浴組成の切り換えが困難になる。Furthermore, since the sink roll is immersed in the hot-dip plating bath, a large-capacity hot-dip bath is required.
Switching of bath composition becomes difficult.
【０００５】そこで、このような悪影響を排除して高品
質の溶融めっき鋼帯を製造するために、シンクロールを
使用しない溶融めっき設備を用い、鋼帯を下から上に一
方向に走行させて空中ポットに収容した溶融めっき金属
中を通過させる方式が検討されており、特開平８−３３
３６６３号公報等で提案されている。Therefore, in order to eliminate such adverse effects and produce a high quality hot-dip galvanized steel strip, a hot-dip galvanizing facility without using a sink roll is used to move the steel strip from bottom to top in one direction. A method of passing through a hot-dip metal coated in an aerial pot has been studied.
3663 and the like.
【０００６】図２は従来の空中ポットを使用した溶融め
っき設備の概略側面図、図３は図２のIII-III 線矢視の
拡大平面図、図４は図３のIV-IV 線矢視の拡大断面図で
ある。FIG. 2 is a schematic side view of a conventional hot-dip plating apparatus using an aerial pot, FIG. 3 is an enlarged plan view taken along the line III-III of FIG. 2, and FIG. 4 is a view taken along the line IV-IV of FIG. It is an expanded sectional view of.
【０００７】図２に示すように、シンクロールを使用し
ない溶融めっき設備では、還元焼鈍炉で表面活性化され
た鋼帯１は、導入室２内に配置されているデフレクタロ
ール３を経て上方へ引き上げられ、シールロール４，４
を経て空中ポット５に導入される。As shown in FIG. 2, in a hot-dip plating facility that does not use a sink roll, a steel strip 1 whose surface has been activated in a reduction annealing furnace passes upward through a deflector roll 3 disposed in an introduction chamber 2. Pulled up, seal rolls 4, 4
And is introduced into the aerial pot 5.
【０００８】鋼帯１の酸化を防止するため、導入室２内
にはＨ2 −Ｎ2 ガスが満たされており、シールロール
４，４と空中ポット５との間にはＮ2 ガスが満たされて
いる。シールロール４，４は、導入室２と空中ポット５
との間をガス遮断し、めっき開始時、めっき停止時等に
導入室２への大気侵入による爆発を防止する。In order to prevent the steel strip 1 from being oxidized, the introduction chamber 2 is filled with H 2 -N 2 gas, and the space between the seal rolls 4 and 4 and the air pot 5 is filled with N 2 gas. Have been. The seal rolls 4 and 4 are provided in the introduction chamber 2 and the air pot 5.
To prevent an explosion due to air intrusion into the introduction chamber 2 when plating is started or stopped.
【０００９】溶融めっき金属６は、ポンプ７によりサブ
ポット８から供給管９を経て空中ポット５へ送り込まれ
る。空中ポット５内の溶融めっき金属６は、鋼帯１と接
する側で上へ流れるように循環し、両側部からオーバー
フローして排出管１２が接続された室へ落ち、排出管１
２を経てサブポット８内へ流下する。The hot-dip metal 6 is sent from the sub-pot 8 to the aerial pot 5 by the pump 7 via the supply pipe 9. The hot-dip metal 6 in the aerial pot 5 circulates so as to flow upward on the side in contact with the steel strip 1, overflows from both sides and falls into a chamber to which the discharge pipe 12 is connected, and the discharge pipe 1
It flows down into the sub-pot 8 through 2.
【００１０】空中ポット５の浴槽１９の底部には鋼帯搬
入開口部１３が形成されており、この開口部１３から溶
融めっき金属６が漏出・流下しないように、溶融めっき
金属６に上向きの電磁力を付与する高周波電磁石１０
が、開口部１３の周囲に図３のように設けられている。At the bottom of the bathtub 19 of the aerial pot 5, there is formed an opening 13 for carrying in a steel strip, and an upward electromagnetic wave is applied to the hot-dip metal 6 so that the hot-dip metal 6 does not leak or flow down from this opening 13. High-frequency electromagnet 10 for applying force
Are provided around the opening 13 as shown in FIG.
【００１１】図４に示すように、従来の高周波電磁石１
０は、通常、開口部１３内を通過する鋼帯１の両面に対
向する配置で一対の磁極１７’，１７’を構成した鉄心
コア１５と、この鉄心コア１５の対称部に設けた複数個
の励磁コイル１６（図３）とで構成されている。そし
て、一対の磁極１７’，１７’は、開口部１３を挟んで
対峙しており、板幅方向と平行な面で向かい合い、相互
に一定の間隔ｇを隔てて設けられている。なお、図４中
の１８は、鉄心コア１５及び磁極１７’，１７’の上下
面を覆う真鍮等の覆板である。As shown in FIG. 4, a conventional high-frequency electromagnet 1
Reference numeral 0 denotes an iron core 15 having a pair of magnetic poles 17 ′ and 17 ′ arranged in opposition to both sides of the steel strip 1 passing through the opening 13, and a plurality of cores provided at symmetrical portions of the iron core 15. And the exciting coil 16 (FIG. 3). The pair of magnetic poles 17 ′, 17 ′ face each other across the opening 13, face each other in a plane parallel to the plate width direction, and are provided at a certain interval g from each other. Reference numeral 18 in FIG. 4 is a cover plate made of brass or the like that covers the upper and lower surfaces of the iron core 15 and the magnetic poles 17 ′, 17 ′.
【００１２】従って、この溶融めっき設備では、溶融め
っき金属６を満たした空中ポット５の底部の開口部１３
から鋼帯１を導入し、この鋼帯１を、溶融めっき金属６
と接触させた後、上方に引き上げることにより、溶融め
っきする。空中ポット５を出た後の鋼帯１はガスワイピ
ングノズル１１からワイピングガスが吹き付けられて過
剰量の溶融めっき金属６が除去される。かくして、めっ
き付着量が調整された溶融めっき鋼帯が製造される。Therefore, in this hot-dip plating equipment, the opening 13 at the bottom of the aerial pot 5 filled with the hot-dip metal 6 is provided.
The steel strip 1 is introduced from the
, And then hot-dip by pulling up. After leaving the aerial pot 5, the steel strip 1 is blown with a wiping gas from a gas wiping nozzle 11 to remove an excessive amount of the hot-dip plated metal 6. Thus, a hot-dip steel strip having an adjusted coating weight is produced.
【００１３】そして、このめっき作業中には、空中ポッ
ト５の排出管１２接続室側の壁をプラグ１４，１４で塞
ぎ、高周波電磁石１０による電磁力で開口部１３から溶
融めっき金属６が漏出・流下するのを阻止しながら、空
中ポット５内に所定量の溶融めっき金属６を保持する。
即ち、高周波電磁石１０の励磁コイル１６へ通電する
と、図４に示すように 磁極１７’，１７’間に鋼帯１
面と直角方向の磁力線Ｂが発生し、この磁力線Ｂにより
溶融めっき金属６内に生じる板幅方向の誘導渦電流Ｉに
よって、上向きの電磁押上力Ｆが発生する。そして、こ
の上向きの電磁押上力Ｆで開口部１３内の溶融めっき金
属６を押し上げ保持することにより、溶融めっき金属６
の漏出・流下を防止する。During the plating operation, the wall of the aerial pot 5 on the side of the discharge pipe 12 connection chamber is closed with the plugs 14 and 14, and the molten metal 6 leaks out of the opening 13 by the electromagnetic force of the high-frequency electromagnet 10. A predetermined amount of hot-dip metal 6 is held in the aerial pot 5 while preventing the metal from flowing down.
That is, when the excitation coil 16 of the high-frequency electromagnet 10 is energized, the steel strip 1 is placed between the magnetic poles 17 ', 17' as shown in FIG.
Lines of magnetic force B perpendicular to the surface are generated, and an induced electromagnetic eddy current I generated in the hot-dip metal 6 in the plate width direction by the lines of magnetic force B generates an upward electromagnetic pushing force F. Then, the hot-dip metal 6 in the opening 13 is pushed up and held by the upward electromagnetic pushing force F, so that the hot-dip metal 6
To prevent leakage and flow down.
【００１４】めっき作業を停止させるときには、プラグ
１４，１４を開放し、排出管１２，１２を経由して、空
中ポット５内の溶融めっき金属６をサブポット８に排出
する。When the plating operation is stopped, the plugs 14 are opened, and the hot-dip plated metal 6 in the air pot 5 is discharged to the sub-pot 8 via the discharge pipes 12.
【００１５】[0015]
【発明が解決しようとする課題】上記従来の溶融めっき
設備では、空中ポット５の開口部１３が溶融めっき金属
６で満たされた状態で、所定の電磁力が溶融めっき金属
６に対して流下阻止作用をするように高周波電磁石１０
を設計すると、めっき開始時には、開口部１３内に溶融
めっき金属６が溜まるまで電磁力が過剰となるため溶融
めっき金属６の底面が不安定となり、多量の溶融めっき
金属６が開口部１３から漏出・流下する。また、めっき
作業を停止するときにも、空中ポット５内の溶融めっき
金属６を排出管１２を経由してサブポット８に送り、開
口部１３内の溶融めっき金属６が少なくなると、同様に
電磁力が過剰となり、溶融めっき金属６が開口部１３か
ら漏出・流下する。In the above conventional hot-dip plating equipment, a predetermined electromagnetic force is prevented from flowing down to the hot-dip metal 6 while the opening 13 of the air pot 5 is filled with the hot-dip metal 6. High frequency electromagnet 10
When the plating is started, the electromagnetic force becomes excessive until the molten metal 6 is accumulated in the opening 13 at the start of plating, so that the bottom surface of the molten metal 6 becomes unstable, and a large amount of the molten metal 6 leaks from the opening 13.・ Run down. Also, when the plating operation is stopped, when the hot-dip metal 6 in the air pot 5 is sent to the sub-pot 8 via the discharge pipe 12 and the amount of the hot-dip metal 6 in the opening 13 is reduced, the electromagnetic force is similarly reduced. Becomes excessive, and the hot-dip plated metal 6 leaks and flows down from the opening 13.
【００１６】このめっき開始時やめっき停止時に漏出・
流下した溶融めっき金属６は、空中ポット５の下方に配
置されているシールロール４，４やデフレクタロール３
に付着・凝固し、シールロール４，４やデフレクタロー
ル３の円滑な回転を阻害する原因となる。また、ロール
３，４の表面に付着した溶融めっき金属６は、鋼帯１に
押し疵を発生させる原因となり、溶融めっき鋼帯の品質
や歩留りを低下させる。このため、開口部１３からの溶
融めっき金属６の漏出・流下を防止する種々の対策が検
討されている。When the plating is started or stopped,
The flowing hot-dip metal 6 flows into the seal rolls 4 and 4 and the deflector rolls 3 disposed below the aerial pot 5.
Adheres and solidifies to the seal rolls, which hinders smooth rotation of the seal rolls 4, 4 and the deflector roll 3. Further, the hot-dip coated metal 6 adhered to the surfaces of the rolls 3 and 4 causes a press flaw in the steel strip 1 and lowers the quality and yield of the hot-dip coated steel strip. For this reason, various countermeasures for preventing the molten plated metal 6 from leaking and flowing down from the opening 13 are being studied.
【００１７】図４に示す従来の高周波電磁石１０では、
一対の磁極１７’，１７’が板幅方向に平行な面で向き
合って配置されているため、この磁極１７’，１７’間
には上下で対称な磁場が発生する。このため、通常、こ
の磁場の中間高さ付近に開口部１３を配置し、磁気押上
力Ｆの作用で開口部１３内の溶融めっき金属６を押し上
げ浮上させて、漏出止めシールを行ってきた。In the conventional high-frequency electromagnet 10 shown in FIG.
Since the pair of magnetic poles 17 ', 17' are arranged facing each other on a plane parallel to the plate width direction, a vertically symmetric magnetic field is generated between the magnetic poles 17 ', 17'. For this reason, usually, the opening 13 is arranged near the intermediate height of the magnetic field, and the molten plating metal 6 in the opening 13 is pushed up and floated by the action of the magnetic lifting force F to perform the leakage prevention seal.
【００１８】ところが、開口部１３からの漏出止めシー
ル効果を高めるためには開口部１３のまわりの磁束密度
を高めることが必要になるが、図４に示す従来の高周波
電磁石１０では、磁極１７’，１７’間全体の磁束密度
を高めなければならず、そのために高い投入電力が必要
となっていた。そして、このことは、めっき開始時やめ
っき停止時に電磁力の過剰を招く要因となっていた。However, in order to enhance the effect of preventing leakage from the opening 13, it is necessary to increase the magnetic flux density around the opening 13. However, in the conventional high-frequency electromagnet 10 shown in FIG. , 17 ', the magnetic flux density of the whole must be increased, which requires a high input power. This has been a factor that causes an excessive electromagnetic force at the time of starting plating or at the time of stopping plating.
【００１９】従って本発明は上記従来技術に鑑み、最小
限の投入電力で必要な電磁押上力を得ることができる溶
融金属浮上用高周波電磁石及びこの高周波電磁石を備え
た空中ポットを提供することを課題とする。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a high-frequency electromagnet for levitation of a molten metal and an aerial pot provided with the high-frequency electromagnet, which can obtain a required electromagnetic pushing force with a minimum input power in view of the above prior art. And
【００２０】[0020]
【課題を解決するための手段】上記課題を解決する本発
明の溶融金属浮上用高周波電磁石は、鋼帯搬入開口部を
挟んで対峙する一対の磁極を、その下部側が一定の間隔
で向かい合う平行面部で構成し、その上部側が前記平行
面部に連続し上方に拡がるテーパ面部で構成してなるこ
とを特徴とする。According to the present invention, there is provided a high-frequency electromagnet for levitation of molten metal according to the present invention, comprising a pair of magnetic poles facing each other across a steel strip carry-in opening, and a parallel surface portion having lower portions facing each other at a predetermined interval. , And the upper side thereof is constituted by a tapered surface portion which is continuous with the parallel surface portion and expands upward.
【００２１】また、本発明の空中ポットは、空中ポット
の鋼帯搬入開口部に、溶融めっき金属の流下を防止する
高周波電磁石を設置してなる溶融めっき設備の空中ポッ
トであって、前記高周波電磁石の前記鋼帯搬入開口部を
挟んで対峙する一対の磁極を、その下部側が一定の間隔
で向かい合う平行面部で構成し、その上部側が前記平行
面部に連続し上方に拡がるテーパ面部で構成してなるこ
と特徴とする。Further, the aerial pot of the present invention is an aerial pot of a hot-dip plating facility in which a high-frequency electromagnet for preventing the flow of hot-dip metal is prevented from being installed at a steel strip carry-in opening of the aerial pot. A pair of magnetic poles facing each other with the steel strip carry-in opening therebetween being constituted by a parallel surface portion whose lower side faces at a constant interval, and an upper side thereof is constituted by a taper surface portion which is continuous with the parallel surface portion and expands upward. It is characterized.
【００２２】[0022]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づき詳細に説明する。なお、本発明は高周波電磁石
の磁極の構造に工夫を施したものであるため、ここで
は、この点について詳述し、その他の構成については従
来（図２，図３）と同様として、その詳細な説明及び図
示を省略する。Embodiments of the present invention will be described below in detail with reference to the drawings. In the present invention, the structure of the magnetic poles of the high-frequency electromagnet is devised, so that this point will be described in detail here, and the other configuration will be the same as the conventional one (FIGS. 2 and 3). Detailed description and illustration are omitted.
【００２３】図１は本発明の実施の形態に係る溶融金属
浮上用高周波電磁石及びこの高周波電磁石を備えた空中
ポットの要部断面図（図４に対応する図）である。FIG. 1 is a sectional view (corresponding to FIG. 4) of a main part of a high-frequency electromagnet for floating molten metal and an aerial pot provided with this high-frequency electromagnet according to an embodiment of the present invention.
【００２４】＜構成＞図１に示すように、空中ポット５
の浴槽１９の底部には鋼帯搬入開口部１３が形成されて
おり、この開口部１３から溶融めっき金属６が漏出・流
下しないように、溶融めっき金属６に上向きの電磁力を
付与する高周波電磁石１０が、開口部１３の周囲に設け
られている。<Structure> As shown in FIG.
A steel strip carry-in opening 13 is formed at the bottom of the bathtub 19, and a high-frequency electromagnet that applies an upward electromagnetic force to the hot-dip metal 6 so that the hot-dip metal 6 does not leak or flow down from this opening 13. 10 are provided around the opening 13.
【００２５】そして、この高周波電磁石１０の鋼帯１を
挟んで対峙する一対の磁極１７，１７は、その下部側が
一定の小さい間隔ｇ1 で向かい合う平行面部１７ａ，１
７ａで構成され、その上部側が前記平行面部１７ａ，１
７ａの上端に連続し上方に拡がるテーパ面部１７ｂ，１
７ｂで構成されている。テーパ面部１７ｂ，１７ｂの上
端における間隔はｇ2 （＞ｇ1 ）である。[0025] The pair of magnetic poles 17 and 17 facing each other across the steel strip 1 in the high-frequency electromagnet 10, parallel surface portions 17a facing the lower side in constant small gap g 1, 1
7a, the upper side of which is the parallel plane portion 17a, 1
7a, a tapered surface portion 17b, 1 continuing to the upper end and expanding upward
7b. The interval between the upper ends of the tapered surface portions 17b, 17b is g 2 (> g 1 ).
【００２６】また、空中ポット５の開口部１３は、その
下端が磁極１７，１７の平行面部１７ａ，１７ａ間に位
置し、磁極１７，１７の平行面部１７ａ，１７ａとテー
パ面部１７ｂ，１７ｂとに沿った形状となっている。The lower end of the opening 13 of the aerial pot 5 is located between the parallel planes 17a, 17a of the magnetic poles 17, 17, and is formed between the parallel planes 17a, 17a of the magnetic poles 17, 17 and the tapered planes 17b, 17b. It has a shape along.
【００２７】＜作用・効果＞本実施の形態に係る溶融金
属浮上用高周波電磁石１０及びこの高周波電磁石１０を
備えた空中ポット５によれば、次のような作用・効果が
得られる。<Operation / Effect> According to the high-frequency electromagnet 10 for floating molten metal and the aerial pot 5 having the high-frequency electromagnet 10 according to the present embodiment, the following operation / effect can be obtained.
【００２８】励磁コイル１６（図３参照）への通電によ
り図４に示すような磁極１７’，１７’間に発生する磁
場において、磁気抵抗をＲ、磁極１７’，１７’間にお
ける透磁率をμ0 （ほぼ一定値）、向かい合う磁極１
７’の面積をＡ、磁極１７’，１７’間の間隔をｇとす
ると、磁気抵抗Ｒは次式で表される。In a magnetic field generated between the magnetic poles 17 ', 17' as shown in FIG. 4 by energizing the exciting coil 16 (see FIG. 3), the magnetic resistance is R, and the magnetic permeability between the magnetic poles 17 ', 17' is μ 0 (almost constant), facing magnetic pole 1
If the area of 7 ′ is A and the interval between the magnetic poles 17 ′, 17 ′ is g, the magnetic resistance R is expressed by the following equation.
【００２９】 Ｒ＝ｇ／（μ0 ×Ａ） ・・・（１）R = g / (μ 0 × A) (1)
【００３０】また、励磁コイル１６への通電によって発
生する起磁力をｆ1 、磁力線Ｂの磁束密度をＢm 、磁気
抵抗をＲとすると、磁束密度Ｂm は、式（１）から、次
式で表される。Assuming that the magnetomotive force generated by energizing the exciting coil 16 is f 1 , the magnetic flux density of the line of magnetic force B is B m , and the magnetic resistance is R, the magnetic flux density B m is given by the following equation from equation (1). It is represented by
【００３１】 Ｂm ＝ｆ1 ／（Ｒ×Ａ）＝（μ0 ×ｆ1 ）／ｇ ・・・（２）B m = f 1 / (R × A) = (μ 0 × f 1 ) / g (2)
【００３２】一方、図１において、磁極１７の平行面部
１７ａ側の磁気抵抗をＲ1 、テーパ面部１７ｂ側の磁気
抵抗をＲ2 、平行面部１７ａ，１７ａ間の間隔をｇ1 、
テーパ面部１７ｂ，１７ｂ間の間隔を最大部で代表して
ｇ2 、間隔ｇ1 とｇ2 との関係を〔ｇ2 ＞ｇ1 〕、平行
面部１７ａの面積をＡ1 、テーパ面部１７ｂの面積をＡ
2 、面積Ａ1 とＡ2 の割合を〔Ａ1 ／Ａ2 ≦ｇ1 ／
ｇ2 〕とすると、式（１）から、次の関係が成り立つ。On the other hand, in FIG. 1, the magnetic resistance of the magnetic pole 17 on the parallel surface portion 17a side is R 1 , the magnetic resistance on the taper surface portion 17b side is R 2 , the interval between the parallel surface portions 17a, 17a is g 1 ,
Area of the tapered surface portion 17b, the distance between 17b and represented by the largest portion g 2, the relation between the distance g 1 and g 2 [g 2> g 1], the area of the parallel surface portions 17a A 1, tapered surface portion 17b A
2 , the ratio of the areas A 1 and A 2 is [A 1 / A 2 ≦ g 1 /
g 2 ], the following relationship holds from equation (1).
【００３３】 〔Ｒ1 ＝ｇ1 ／（μ0 ×Ａ1 ）〕＜〔Ｒ2 ＝ｇ2 ／（μ0 ×Ａ2 ）〕・・（３）[R 1 = g 1 / (μ 0 × A 1 )] <[R 2 = g 2 / (μ 0 × A 2 )] (3)
【００３４】また、磁極１７の平行面部１７ａ側の磁束
密度をＢm-1 、テーパ面部１７ｂ側の磁束密度をＢm-2
とすると、式（２）及び（３）から、次式の関係が成り
立つ。The magnetic flux density of the magnetic pole 17 on the parallel surface portion 17a side is B m -1 and the magnetic flux density on the taper surface portion 17b side is B m -2.
Then, from the equations (2) and (3), the following equation holds.
【００３５】 〔Ｂm-1 ＝ｆ1 ／（Ｒ1 ×Ａ1 ）＝（μ0 ×ｆ1 ）／ｇ1 〕 ＞〔Ｂm-2 ＝ｆ1 ／（Ｒ2 ×Ａ2 ）＝（μ0 ×ｆ1 ）／ｇ2 〕・・（４）[B m−1 = f 1 / (R 1 × A 1 ) = (μ 0 × f 1 ) / g 1 ]> [B m−2 = f 1 / (R 2 × A 2 ) = ( μ 0 × f 1 ) / g 2 ] (4)
【００３６】即ち、式（４）において、〔ｇ2 ＞ｇ1 〕
の関係にあるから、一定の投入電力による一定の起磁力
ｆ1 のもとでは、磁極１７の平行面部１７ａ側の磁束密
度Ｂ m-1 が常にテーパ面部１７ｂ側の磁束密度Ｂm-2 よ
りも大きく保たれる。That is, in equation (4), [gTwo> G1]
A constant magnetomotive force with a constant input power
f1, The magnetic flux density on the parallel surface 17a side of the magnetic pole 17
Degree B m-1Is always the magnetic flux density B on the tapered surface portion 17b side.m-2Yo
Is kept large.
【００３７】従って、本実施の形態に係る高周波電磁石
１０によれば、高周波電磁石１０の一対の磁極１７，１
７を、その下部側が一定の間隔で向かい合う平行面部１
７ａ，１７ａで構成し、上部側が前記平行面部１７ａ，
１７ｂに連続し上方に拡がるテーパ面部１７ｂ，１７ｂ
で構成することによって、磁極１７，１７間に発生する
磁力線Ｂを、前述した作用のもとでスムースに平行面部
１７ａ，１７ａ側に集中させることができる。Therefore, according to the high-frequency electromagnet 10 according to the present embodiment, the pair of magnetic poles 17, 1 of the high-frequency electromagnet 10 are provided.
7, a parallel surface portion 1 whose lower side faces at a fixed interval.
7a, 17a, and the upper side is the parallel plane portion 17a, 17a.
Tapered surface portions 17b, 17b continuing from 17b and expanding upward
With this configuration, the lines of magnetic force B generated between the magnetic poles 17, 17 can be smoothly concentrated on the parallel plane portions 17a, 17a under the action described above.
【００３８】そして、この高周波電磁石１０を備えた空
中ポット５によれば、空中ポット５の開口部１３の下端
を磁極１７，１７の平行面部１７ａ，１７ａ間の磁力線
Ｂの集中する磁場内に維持することにより、同一投入電
力のもとで従来よりも溶融めっき金属６の保持力（電磁
押上力）Ｆを高めることができる。即ち、最小限の投入
電力で、空中ポット５の開口部１３からの漏出・流下を
効率よく防止することできる。According to the aerial pot 5 having the high-frequency electromagnet 10, the lower end of the opening 13 of the aerial pot 5 is maintained in a magnetic field in which the lines of magnetic force B between the parallel surfaces 17a, 17a of the magnetic poles 17, 17 are concentrated. By doing so, it is possible to increase the holding force (electromagnetic push-up force) F of the hot-dip plated metal 6 under the same input power as compared with the related art. That is, it is possible to efficiently prevent leakage and flow down from the opening 13 of the aerial pot 5 with minimum input power.
【００３９】しかも、投入電力を低減することができる
ため、めっき開始時やめっき停止時に電磁力が過剰とな
って溶融めっき金属６が開口部１３から漏出・流下して
しまうのを防止することができる。In addition, since the input power can be reduced, it is possible to prevent the molten metal 6 from leaking or flowing down from the opening 13 due to excessive electromagnetic force at the start of plating or at the stop of plating. it can.
【００４０】[0040]
【発明の効果】以上、発明の実施の形態と共に具体的に
説明したように、本発明の溶融金属浮上用高周波電磁石
は、鋼帯搬入開口部を挟んで対峙する一対の磁極を、そ
の下部側が一定の間隔で向かい合う平行面部で構成し、
その上部側が前記平行面部に連続し上方に拡がるテーパ
面部で構成してなることを特徴とする。As described above in detail with the embodiments of the present invention, the high-frequency electromagnet for levitation of molten metal of the present invention has a pair of magnetic poles opposed to each other with the steel strip carry-in opening therebetween. Consisting of parallel plane parts facing each other at regular intervals,
The upper side is constituted by a tapered surface portion which is continuous with the parallel surface portion and expands upward.
【００４１】また、本発明の空中ポットは、空中ポット
の鋼帯搬入開口部に、溶融めっき金属の流下を防止する
高周波電磁石を設置してなる溶融めっき設備の空中ポッ
トであって、前記高周波電磁石の前記鋼帯搬入開口部を
挟んで対峙する一対の磁極を、その下部側が一定の間隔
で向かい合う平行面部で構成し、その上部側が前記平行
面部に連続し上方に拡がるテーパ面部で構成してなるこ
と特徴とする。The aerial pot of the present invention is an aerial pot of a hot-dip plating facility in which a high-frequency electromagnet for preventing hot-dip metal from flowing down is installed in a steel strip carry-in opening of the aerial pot. A pair of magnetic poles facing each other with the steel strip carry-in opening therebetween being constituted by a parallel surface portion whose lower side faces at a constant interval, and an upper side thereof is constituted by a taper surface portion which is continuous with the parallel surface portion and expands upward. It is characterized.
【００４２】従って、本発明の溶融金属浮上用高周波電
磁石によれば、高周波電磁石の一対の磁極を、その下部
側が一定の間隔で向かい合う平行面部で構成し、その上
部側が前記平行面部に連続し上方に拡がるテーパ面部で
構成することによって、前記磁極間に発生する磁力線Ｂ
を、スムースに前記平行面部側に集中させることができ
る。Therefore, according to the high frequency electromagnet for levitation of molten metal of the present invention, the pair of magnetic poles of the high frequency electromagnet are constituted by parallel plane portions whose lower sides face at a fixed interval, and the upper side thereof is continuous with the parallel plane section and extends upward. The magnetic force lines B generated between the magnetic poles
Can be smoothly concentrated on the parallel plane portion side.
【００４３】そして、この高周波電磁石を備えた本発明
の空中ポットによれば、空中ポットの鋼帯搬入開口部の
下端を前記磁極の平行面部間の磁力線の集中する磁場内
に維持することにより、同一投入電力のもとで従来より
も溶融めっき金属の保持力（電磁押上力）を高めること
ができる。即ち、最小限の投入電力で、空中ポットの鋼
帯搬入開口部からの漏出・流下を効率よく防止すること
できる。According to the aerial pot of the present invention having the high-frequency electromagnet, the lower end of the steel strip carrying opening of the aerial pot is maintained in a magnetic field in which the lines of magnetic force between the parallel plane portions of the magnetic poles are concentrated. With the same input power, the holding force (electromagnetic pushing force) of the hot-dip metal can be increased as compared with the conventional case. That is, it is possible to efficiently prevent the air pot from leaking and flowing down from the steel strip carry-in opening with the minimum input power.
【００４４】しかも、投入電力を低減することができる
ため、めっき開始時やめっき停止時に電磁力が過剰とな
って溶融めっき金属が鋼帯搬入開口部から漏出・流下し
てしまうのを防止することができる。In addition, since the input power can be reduced, it is possible to prevent the molten metal from leaking and flowing down from the steel strip carry-in opening due to an excessive electromagnetic force at the start of plating or at the stop of plating. Can be.
【図１】本発明の実施の形態に係る溶融金属浮上用高周
波電磁石及びこの高周波電磁石を備えた空中ポットの要
部断面図（図４に対応する図）である。FIG. 1 is a sectional view (corresponding to FIG. 4) of a main part of a high-frequency electromagnet for floating molten metal and an aerial pot provided with the high-frequency electromagnet according to an embodiment of the present invention.
【図２】従来の空中ポットを使用した溶融めっき設備の
概略側面図である。FIG. 2 is a schematic side view of a conventional hot-dip plating facility using an aerial pot.
【図３】図２のIII-III 線矢視の拡大平面図である。FIG. 3 is an enlarged plan view taken along line III-III of FIG. 2;
【図４】図３のIV-IV 線矢視の拡大断面図である。FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG. 3;
１ 鋼帯 ５ 空中ポット ６ 溶融めっき金属 １３ 鋼帯搬入開口部 １５ 鉄心コア １７ 磁極 １７ａ 平行面部 １７ｂ テーパ面部 １９ 空中ポットの浴槽 Ａ1 平行面部の面積 Ａ2 テーパ面部の面積 ｇ1 平行面部の間隔 ｇ2 テーパ面部の間隔 Ｒ1 平行面部の磁気抵抗 Ｒ2 テーパ面部の磁気抵抗 Ｂ 磁力線 Ｂm-1 平行面部の磁束密度 Ｂm-2 テーパ面部の磁束密度 Ｉ 誘導渦電流 Ｆ 電磁押上力Reference Signs List 1 steel strip 5 aerial pot 6 hot-dip plated metal 13 steel strip carry-in opening 15 iron core 17 magnetic pole 17a parallel face 17b tapered face 19 bath pot of aerial pot A 1 area of parallel face A 2 area of taper face g 1 space of parallel face g 2 magnetic flux density I induced eddy currents F electromagnetic push-up force of the magnetic flux density B m-2 tapered surface portion of the magnetoresistive B field lines B m-1 parallel surface portions of the magnetic resistance R 2 tapered surface portion of the interval R 1 parallel surface portion of the tapered surface portion
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山下 一郎 広島県広島市西区観音新町四丁目６番22号 三菱重工業株式会社広島研究所内 (72)発明者 末盛 秀昭 広島県広島市西区観音新町四丁目６番22号 三菱重工業株式会社広島製作所内 (72)発明者 加藤 千昭 千葉県千葉市中央区川崎町１番地 川崎製 鉄株式会社技術研究所内 (72)発明者 天笠 敏明 千葉県千葉市中央区川崎町１番地 川崎製 鉄株式会社千葉製鉄所内 (72)発明者 細見 和昭 大阪府堺市石津西町５番地 日新製鋼株式 会社技術研究所内 (72)発明者 川口 靖隆 愛媛県東予市北条962番地14号 日新製鋼 株式会社東予建設本部内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ichiro Yamashita 4-22, Kannonshinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Inside the Hiroshima Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Hideaki Suemori 4-chome, Kannonshinmachi, Nishi-ku, Hiroshima-shi, Hiroshima 6-22 Mitsubishi Heavy Industries, Ltd.Hiroshima Plant (72) Inventor Chiaki Kato 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Engineering Co., Ltd. (72) Inventor Toshiaki Amagasa Kawasaki, Chuo-ku, Chiba-shi, Chiba No. 1 Kawasaki Steel Corporation Chiba Works (72) Inventor Kazuaki Hosomi 5 Ishizu Nishimachi Sakai City, Osaka Prefecture Nisshin Steel Co., Ltd.Technical Research Institute (72) Inventor Yasutaka Kawaguchi 962 Hojo, Toyo City, Ehime Prefecture 14 No. Nisshin Steel Co., Ltd.
Claims (2)
磁極を、その下部側が一定の間隔で向かい合う平行面部
で構成し、その上部側が前記平行面部に連続し上方に拡
がるテーパ面部で構成してなることを特徴とする溶融金
属浮上用高周波電磁石。1. A pair of magnetic poles facing each other across a steel strip carry-in opening portion are formed by parallel plane portions whose lower sides face at a fixed interval, and an upper side thereof is formed by a tapered surface section which is continuous with the parallel plane section and expands upward. A high-frequency electromagnet for levitation of molten metal, comprising:
っき金属の流下を防止する高周波電磁石を設置してなる
溶融めっき設備の空中ポットであって、 前記高周波電磁石の前記鋼帯搬入開口部を挟んで対峙す
る一対の磁極を、その下部側が一定の間隔で向かい合う
平行面部で構成し、その上部側が前記平行面部に連続し
上方に拡がるテーパ面部で構成してなること特徴とする
空中ポット。2. An aerial pot of a hot-dip plating facility in which a high-frequency electromagnet for preventing the molten metal from flowing down is installed in a steel strip carry-in opening of the aerial pot, wherein the steel strip carry-in opening of the high-frequency electromagnet is provided. An aerial pot comprising: a pair of magnetic poles facing each other with a lower surface formed of parallel surface portions facing each other at a fixed interval, and an upper side formed of a tapered surface portion continuous with the parallel surface portion and extending upward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00009598A JP3706473B2 (en) | 1998-01-05 | 1998-01-05 | High-frequency electromagnet for levitation of molten metal and air pot equipped with this high-frequency electromagnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00009598A JP3706473B2 (en) | 1998-01-05 | 1998-01-05 | High-frequency electromagnet for levitation of molten metal and air pot equipped with this high-frequency electromagnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11193451A true JPH11193451A (en) | 1999-07-21 |
| JP3706473B2 JP3706473B2 (en) | 2005-10-12 |
Family
ID=11464557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00009598A Expired - Fee Related JP3706473B2 (en) | 1998-01-05 | 1998-01-05 | High-frequency electromagnet for levitation of molten metal and air pot equipped with this high-frequency electromagnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3706473B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005005681A1 (en) * | 2003-07-08 | 2005-01-20 | Sms Demag Aktiengesellschaft | Device for hot dip coating a metal strip |
| WO2007003315A3 (en) * | 2005-07-01 | 2007-06-07 | Sms Demag Ag | Apparatus for hot-dip coating a metal bar |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017109559B3 (en) * | 2017-05-04 | 2018-07-26 | Fontaine Engineering Und Maschinen Gmbh | Apparatus for treating a metal strip |
-
1998
- 1998-01-05 JP JP00009598A patent/JP3706473B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005005681A1 (en) * | 2003-07-08 | 2005-01-20 | Sms Demag Aktiengesellschaft | Device for hot dip coating a metal strip |
| US7476276B2 (en) | 2003-07-08 | 2009-01-13 | Sms Demag Ag | Device for hot dip coating a metal strip |
| WO2007003315A3 (en) * | 2005-07-01 | 2007-06-07 | Sms Demag Ag | Apparatus for hot-dip coating a metal bar |
| JP2008545062A (en) * | 2005-07-01 | 2008-12-11 | エス・エム・エス・デマーク・アクチエンゲゼルシャフト | Metal dip melt dip coating equipment |
| AU2006265440B2 (en) * | 2005-07-01 | 2010-11-11 | Sms Siemag Aktiengesellschaft | Apparatus for hot-dip coating a metal bar |
| JP2013067868A (en) * | 2005-07-01 | 2013-04-18 | Sms Siemag Ag | Hot-dip coating device of metallic continuous body |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3706473B2 (en) | 2005-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2010052906A1 (en) | Device for continuously casting steel | |
| KR100290447B1 (en) | Coating method and apparatus for strip material surface | |
| CA2196056C (en) | Electro-magnetic plugging means for hot dip coating pot | |
| JPH11193451A (en) | High frequency electromagnet for levitating molten metal, and levitating pot provided with the electromagnet | |
| JP2008183597A (en) | Continuous casting method of steel, and method for manufacturing steel plate | |
| ITMI20071166A1 (en) | METHOD AND DEVICE FOR THE CONTROL OF THE COATING THICKNESS OF A METAL METAL PRODUCT | |
| JPH02298247A (en) | Plating method with molten metal | |
| US6106620A (en) | Electro-magnetic plugging means for hot dip coating pot | |
| JPH11158593A (en) | Floating-up pot in air in hot dipping equipment | |
| JPH11209858A (en) | Aerial pot for floating hot dipping metal | |
| JPH1046310A (en) | Hot dip coating method without using sinkroll and coating device | |
| JPH051359A (en) | Method for coating hot-dip metal coated steel sheet | |
| KR100312131B1 (en) | Vertical floating type hot dip coating method and apparatus using linear induction motors and high frequency coils | |
| JP3498430B2 (en) | Manufacturing equipment for hot-dip coated steel sheets | |
| JPH1046311A (en) | Hot dip coating device provided with electromagnetic sealing mechanism | |
| JPH0293052A (en) | Galvanizing equipment | |
| JP2010110766A (en) | Continuous casting apparatus for steel and continuous casting method for steel | |
| JPH1192901A (en) | Hot dip metal coating device | |
| Lloyd-Jones et al. | Investigation into magnetic wiping techniques as alternative to gas wiping on hot dip galvanising lines | |
| KR20040019730A (en) | Apparatus for floating molten metal in the molten metal plating process using ac eletromanetic field, floating method thereof | |
| JP3034958B2 (en) | Method and apparatus for holding molten metal | |
| JPH11222657A (en) | Continuous hot dip metal plating device | |
| KR100234004B1 (en) | Melting coating knife apparatus | |
| JP3217718B2 (en) | Hot-dip metal plating equipment | |
| JP2010013705A (en) | Device for controlling molten metal bath and method for manufacturing hot-dipped metal strip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040914 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20041006 |
|
| A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A711 Effective date: 20041006 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20041006 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050628 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050705 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050729 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080805 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090805 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090805 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100805 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100805 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110805 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110805 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120805 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130805 Year of fee payment: 8 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |