JPS6231987A - Heating coil for induction type edge heater - Google Patents
Heating coil for induction type edge heaterInfo
- Publication number
- JPS6231987A JPS6231987A JP17003985A JP17003985A JPS6231987A JP S6231987 A JPS6231987 A JP S6231987A JP 17003985 A JP17003985 A JP 17003985A JP 17003985 A JP17003985 A JP 17003985A JP S6231987 A JPS6231987 A JP S6231987A
- Authority
- JP
- Japan
- Prior art keywords
- heating coil
- induction type
- edge heater
- iron core
- heater device
- 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
- General Induction Heating (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本光明１Ｊ、圧延ラインに流れる被圧延体のエツジ部分
にうず電流を流して加熱する誘導式エツジヒータ装置の
加熱コイルの改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in the heating coil of an induction type edge heater device that heats the edge portion of a rolled object flowing in a rolling line by passing an eddy current therethrough.
熱間圧延ラインの概略は、加熱炉により加熱された被圧
延体を粗圧延機ににり粗圧延し、この後ｆｔ上圧延機に
流して所定の板圧に圧延するものとなっている。ところ
が、粗圧延機に達する前および粗圧延機と仕上圧延機と
の間に流れる被圧延体は、エツジ部分と中央部分とでは
その温度が異なっており、エツジ部分の方が中央部分よ
りもかなり低くなっている。特に直送圧延において温度
差が顕著である。このため、鋼種にっては圧延により製
品に欠陥を生じて品質の低下さらには生産能率の低下と
いう問題が起こる。したがって、従来はＴ ｒａｎｓｖ
ｅｒｓ Ｆ ｌｕｘ方式によってうず電流をエツジ部
分に流してこのエツジ部分を誘導加熱している。第３図
はこの方式を適用した従来の誘導式Ｔツジヒータ装置の
加熱コイルの構成図である。The outline of the hot rolling line is such that a workpiece heated in a heating furnace is roughly rolled in a rough rolling mill, and then passed through a ft. upper rolling mill to be rolled to a predetermined sheet thickness. However, before reaching the rough rolling mill and between the rough rolling mill and the finishing mill, the temperature of the rolled material differs between the edge and center parts, with the edge part having a much higher temperature than the center part. It's getting lower. The temperature difference is particularly noticeable in direct rolling. For this reason, depending on the type of steel, rolling causes defects in the product, resulting in lower quality and lower production efficiency. Therefore, conventionally T transv
By using the ers F lux method, an eddy current is passed through the edge portion to inductively heat the edge portion. FIG. 3 is a configuration diagram of a heating coil of a conventional induction type T-shaped heater device to which this method is applied.
具体的に説明すると、被圧延体１０両エツジ部分にこの
被圧延体１を介して上部インダクタ２および下部インダ
クタ３を８Ｑ ＩＩする。なお、これらインダクタ２．
３は、それぞれ鉄心４．５とこれら鉄心４．５に巻回さ
れた各加熱コイル６．７とから構成されている。なお、
各加熱コイル６．７は絶縁等により２００℃以下に維持
する必要がある。Specifically, an upper inductor 2 and a lower inductor 3 are connected to the edge portions of the rolled object 10 via the rolled object 1. Note that these inductors 2.
3 is composed of iron cores 4.5 and heating coils 6.7 wound around these iron cores 4.5. In addition,
Each heating coil 6.7 must be maintained at a temperature of 200° C. or lower by insulation or the like.
したがって、各加熱コイル６．７は、約１０００℃の被
圧延体１からの輻射熱を防ぐために断熱材（不図示）に
よりモールドされている。また、各インダクタ２．３は
被圧延体１を効率良く加熱するためにその間隔を出来る
限り小さく設置してあり、かつ交流Ｎ８！８に接続され
て大電流が供給されるようになっている。このような構
成で各加熱コイル６．７に大電流が供給されると各加熱
コイル６．７間に磁束φが発生し、この磁束φがｍＩＥ
ｆ捧１に直交する。これにより被圧延体１にうず電流１
１．１２、ｉ３．１４が流れ、かくして被圧延体１はこ
れらうず電流により誘導加熱される。Therefore, each heating coil 6.7 is molded with a heat insulating material (not shown) to prevent radiant heat from the rolled object 1 at about 1000°C. In addition, each inductor 2.3 is installed with as small an interval as possible in order to efficiently heat the rolled object 1, and is connected to AC N8!8 so that a large current is supplied. . With such a configuration, when a large current is supplied to each heating coil 6.7, a magnetic flux φ is generated between each heating coil 6.7, and this magnetic flux φ becomes mIE
Orthogonal to f 1. As a result, an eddy current of 1
1.12 and i3.14 flow, and the rolled object 1 is thus induction heated by these eddy currents.
ところが、被圧延体１の表面には一次スケール、二次ス
ケールやヘゲ等の金属片が付着している。However, metal pieces such as primary scale, secondary scale, and sludge are attached to the surface of the rolled object 1.
よって、これら金属片が上記エツジヒータ装置設置位置
に達すると電磁力によって引き寄せられてしまい、場合
によっては強力な電磁力により金属片が断熱材を突き仇
けて加熱コイル６．７まで達することがある。そして、
Ｒ悪の場合この金属片が鉄心４．５と加熱コイル６．７
どの隙間に侵入してしまい、鉄心−加熱コイル間でアー
クが発生して加熱コイルが破損することがしばしばある
。Therefore, when these metal pieces reach the installation position of the edge heater device, they are attracted by the electromagnetic force, and in some cases, the strong electromagnetic force may cause the metal pieces to penetrate the insulation material and reach the heating coil 6.7. . and,
In the case of R-evil, this metal piece is the iron core 4.5 and the heating coil 6.7.
It often happens that the heating coil gets damaged due to the occurrence of an arc between the iron core and the heating coil.
そこで本発明は上記問題点を解決するためになされたも
ので、金属片がたとえ断熱材を突き抜けても鉄心と加熱
コイルと間でのアーク発生を防止できる誘導式エツジヒ
ータ装置の加熱コイルを提供することを目的とする。The present invention has been made to solve the above problems, and provides a heating coil for an induction type edge heater device that can prevent arcing between the iron core and the heating coil even if a metal piece penetrates the insulation material. The purpose is to
Ｃ問題点を解決するための手段〕
本発明は上記目的を達成するために、鉄心と加熱コイル
との隙間部分を加熱コイルから発生する磁束方向に対し
て覆う如く配置した比較的強度が＾くかつ耐熱性が良い
損傷保護体と、この損傷保護体が配置された加熱コイル
をモールドする断熱材とを備えた誘導式エツジヒータ装
置の加熱コイルである。Means for Solving Problem C] In order to achieve the above-mentioned object, the present invention has a comparatively strong steel core arranged so as to cover the gap between the iron core and the heating coil in the direction of the magnetic flux generated from the heating coil. The present invention is a heating coil for an induction type edge heater device, which includes a damage protector having good heat resistance and a heat insulating material molding the heating coil in which the damage protector is disposed.
本発明は、上記各手段を備えたことにより加熱コイルの
電磁力によって引き寄せられた金属片が断熱材を突き抜
けても損傷保護体に当たって鉄心とコイルとの隙間への
侵入が防止される。In the present invention, by providing each of the above-mentioned means, even if a metal piece drawn by the electromagnetic force of the heating coil penetrates through the heat insulating material, it hits the damage protector and is prevented from entering the gap between the iron core and the coil.
以下、本発明の一実施例について図面を参照して説明す
る。An embodiment of the present invention will be described below with reference to the drawings.
第１図は誘導式エツジヒータ装置の加熱コイルの断面構
成図であり、第２図は断熱材を覆う前の構成図である。FIG. 1 is a sectional view of the heating coil of the induction type edge heater device, and FIG. 2 is a view of the configuration before covering with a heat insulating material.
同図において１０は上部インダクタであり、２０は下部
インダクタであって、被圧延体１のエッチ部分に被圧延
体１を介して対向する位置にそれぞれ設置されている。In the figure, 10 is an upper inductor, and 20 is a lower inductor, which are installed at positions facing the etched portion of the rolled object 1 with the rolled object 1 interposed therebetween.
なお、被圧延体１は圧延ライン方向くイ）に流れている
ものとする。ところで、上部インダクタ１０は次のよう
な構成となっている。すなわち、鉄心１１の凸部１２．
１３にそれぞれ加熱コイル１４．１５が巻回されている
。そして、第２図に示す如くこれら鉄心１１の凸部１２
．１３と各加熱コイル１４．１５との隙間１６．１７を
磁束の発生方向に対して覆うように損傷保護体つまりセ
ラミックスタイル１８が複数設置されている。このセラ
ミックスタイル１８は、耐火断熱性をもつセラミックフ
ァイバーと白セメントとを混合してペースト状に形成し
たもので、化学的に安定なアルミナ成分に富み（含有率
約９６％）、耐熱性（約１６００℃）が高く、乾燥また
は加熱により比較的高い強度を発揮し、しかも高い表面
強度（硬度的１５００Ｈｍｖ）をもった特性を有してい
る。そうして、これらセラミックタイル１８が敷き詰め
られた後、断熱材１９により各加熱コイル１４．１５が
モールドされる構成となっている。It is assumed that the rolled object 1 is flowing in the direction of the rolling line (a). Incidentally, the upper inductor 10 has the following configuration. That is, the convex portion 12 of the iron core 11.
Heating coils 14 and 15 are wound around each of 13 and 13, respectively. As shown in FIG.
．． A plurality of damage protectors, that is, ceramic tiles 18 are installed so as to cover the gaps 16.17 between the heating coils 13 and each heating coil 14.15 in the direction of generation of magnetic flux. Ceramic Style 18 is made into a paste by mixing ceramic fiber with fire-resistant and heat-insulating properties and white cement.It is rich in chemically stable alumina components (approximately 96% content) and has heat resistance (approx. 1600° C.), exhibits relatively high strength when dried or heated, and has high surface strength (1500 Hmv in terms of hardness). After these ceramic tiles 18 are laid, each heating coil 14, 15 is molded with a heat insulating material 19.
一方、下部インダクタ２０の構成は上部インダクタ１０
を被圧延体１を介して対称的なものとなっている。つま
り、２１が鉄心、２２．２３が加熱コイル、２４がセラ
ミックタイル、２５が断熱材である。なお、各加熱コイ
ル１４．１５．２２、２３は交流電源に接続されて大電
流が供給されるものとなっている。なお、供給電力は約
２４００ｋｗとなっている。On the other hand, the configuration of the lower inductor 20 is that of the upper inductor 10.
are symmetrical with respect to the rolled object 1. That is, 21 is an iron core, 22, 23 is a heating coil, 24 is a ceramic tile, and 25 is a heat insulating material. Note that each of the heating coils 14, 15, 22, 23 is connected to an AC power source and is supplied with a large current. The power supplied is approximately 2400kw.
次に上記の如く構成された加熱コイルの作用について説
明する。加熱炉１こより加熱され粗圧延機により′＃Ｕ
斤延された被圧延体１は圧延ラインに流されて次の仕上
圧延機に送られる。ここで、粗圧延機から什−１：Ｊｌ
ｉ：延機に流れている被圧延体１は、エツジ部分の温度
が中央部分の温度よりもかなり低くなっている。したが
って、什−Ｆ圧延機に送られる前に第１図に示す装置に
よってエッチ部分が加熱される。つまり、各加熱コイル
１４．１５．２２．２３に大電流が供給されて磁束が発
生する。Next, the operation of the heating coil configured as described above will be explained. It is heated from one heating furnace and rolled by a rough rolling mill.
The rolled object 1 is passed through a rolling line and sent to the next finishing mill. Here, from the rough rolling mill -1: Jl
i: The temperature of the edge portion of the rolled object 1 flowing through the rolling mill is considerably lower than the temperature of the center portion. Therefore, the etched areas are heated by the apparatus shown in FIG. 1 before being sent to the F-F mill. That is, a large current is supplied to each heating coil 14, 15, 22, 23, and magnetic flux is generated.
この磁束は被圧延体１に対して直交するもので、この磁
束により被圧延体１にうず電流が流れる。This magnetic flux is orthogonal to the object to be rolled 1, and an eddy current flows through the object to be rolled 1 due to this magnetic flux.
かくして、あず電流により被圧延体１のエッチ部分は誘
導加熱される。ところが、被圧延体１には一次スカ流、
二次スケールやヘゲ等の金属片が付着しているため、こ
れら金属片が各加熱コイル１４．１５．２２．２３間に
生じている電磁力によって各加熱コイル１４．１５．２
２．２３に比較的強い吸引力で引き寄せられる。これに
より各金属片は断熱材１９または２５を突き抜けてセラ
ミックタイル１８または２４に達する。しかし、このセ
ラミックタイル１８．２４はその強度が高いため金属片
は刺さることはあるが突き抜けてさらに侵入することは
ない。Thus, the etched portion of the rolled object 1 is heated by induction due to the anodic current. However, in the rolled object 1, there is a primary scar flow,
Since metal pieces such as secondary scale and sludge are attached, these metal pieces are caused by the electromagnetic force generated between each heating coil 14.15.2.
2.23 is attracted by a relatively strong attraction. This causes each metal piece to penetrate through the insulation 19 or 25 and reach the ceramic tile 18 or 24. However, the strength of the ceramic tiles 18, 24 is so high that metal pieces can get stuck in them, but they will not penetrate further.
このように上記一実施例においては、鉄心１１．２１と
各加熱］イル１４．１５．２２．２３との隙間を覆うよ
うにセラミックタイル１８．２４を設置したので、−次
スケール、二次スケールやヘゲ等が断熱材を突き抜けた
としても、これら金属片はセラミックタイル１８．２４
で止められて鉄心１１．２１と加熱コーイル１４．１５
．２２．２３との隙間には侵入しない。したがって、鉄
心１１．２１と加熱コイル１４．１５．２２．２３との
間でアークは発生せずに各加熱］イル１４．１５．２２
．２３の損傷を防止できる。さらに、金 Ｉ膜片の侵
入を防止できるので、上部インダクタ１０と下部インダ
クタ２０との間隔を短くできて効率良くエツジ部分を加
熱できる。なお、間隔は従来２０ ｍ ｌｌｌであった
のが約１５ ｍ ｍに短く段間できる。In this way, in the above embodiment, the ceramic tiles 18.24 were installed to cover the gaps between the iron core 11.21 and the heating tiles 14, 15, 22, 23. Even if debris such as sludge or sludge penetrates the insulation, these metal pieces will
Iron core 11.21 and heating coil 14.15 are stopped by
．． Do not enter the gap between 22 and 23. Therefore, no arc is generated between the iron core 11.21 and the heating coil 14.15.22.23, and each heating coil 14.15.22
．． 23 damage can be prevented. Furthermore, since the invasion of gold I film pieces can be prevented, the distance between the upper inductor 10 and the lower inductor 20 can be shortened, and the edge portion can be heated efficiently. Note that the gap between stages, which was conventionally 20 mm, can be reduced to about 15 mm.
以上詳記したように本発明によれば、加熱コイルの電磁
力によって引き寄せられた金属片が断熱材を突き抜けて
も損傷保護体に当たるので、金属片がたとえ断熱材を突
き措けても鉄心と加熱コイルと間でのアーク発生を防止
できる誘導式エツジヒータ装置の加熱コイルを提供でき
る。As detailed above, according to the present invention, even if a metal piece drawn by the electromagnetic force of the heating coil passes through the insulation material, it will hit the damage protector, so even if the metal piece breaks through the insulation material, it will not connect to the iron core. It is possible to provide a heating coil for an induction type edge heater device that can prevent arcing between the heating coil and the heating coil.
第１図は本発明に係わる誘導式エツジヒータ装置の加熱
コイルの一実施例を示す断面構成図、第２図は本発明加
熱コイルにおける断熱材のない状態の構成図、第３図は
従来における加熱コイルの構成図である。
１・・・・・・被圧延体、 １０・・・・・・−上
部インダクタ、 ２０・・・・・・下部インダクタ
、 １１゜２１・・・・・・鉄心、 １４．１
５．２２．２３・・・・・・加熱コイル、 １８．
２４・・・・・・セラミックタイル。
−〇−Fig. 1 is a cross-sectional configuration diagram showing one embodiment of the heating coil of the induction type edge heater device according to the present invention, Fig. 2 is a configuration diagram of the heating coil of the present invention without heat insulating material, and Fig. 3 is a conventional heating coil. It is a block diagram of a coil. 1... Rolled object, 10... Upper inductor, 20... Lower inductor, 11゜21... Iron core, 14.1
5.22.23...Heating coil, 18.
24... Ceramic tile. −〇−
Claims (2)
て圧延ラインに流れる被圧延体のエッジ部分にうず電流
を流して前記エッジ部分を加熱する誘導式エッジヒータ
装置において、前記鉄心と前記加熱コイルとの隙間部分
を前記磁束方向に対して覆う如く配置した比較的強度が
高くかつ耐熱性が良い損傷保護体と、この損傷保護体が
配置された前記コイルをモールドする断熱材とを備えた
ことを特徴とする誘導式エッジヒータ装置の加熱コイル
。(1) In an induction edge heater device that generates magnetic flux by a heating coil wound around an iron core and flows an eddy current through an edge portion of a rolled object flowing to a rolling line to heat the edge portion, the iron core and the A damage protector having relatively high strength and good heat resistance is arranged so as to cover the gap between the heating coil and the magnetic flux direction, and a heat insulating material is provided to mold the coil in which the damage protector is arranged. A heating coil for an induction type edge heater device.
トとを混合して乾燥し形成した特許請求の範囲第（１）
項記載の誘導式エッジヒータ装置の加熱コイル。(2) The damage protector is formed by mixing ceramic fiber and white cement and drying it.
A heating coil of the induction type edge heater device described in 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17003985A JPS6231987A (en) | 1985-08-01 | 1985-08-01 | Heating coil for induction type edge heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17003985A JPS6231987A (en) | 1985-08-01 | 1985-08-01 | Heating coil for induction type edge heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6231987A true JPS6231987A (en) | 1987-02-10 |
| JPH0256794B2 JPH0256794B2 (en) | 1990-12-03 |
Family
ID=15897476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17003985A Granted JPS6231987A (en) | 1985-08-01 | 1985-08-01 | Heating coil for induction type edge heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6231987A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01159991A (en) * | 1987-12-16 | 1989-06-22 | Nkk Corp | induction heating device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07246968A (en) * | 1994-03-11 | 1995-09-26 | Seiichi Nakajima | Bicycle saddle having reflecting mirror and bicycle having the same |
-
1985
- 1985-08-01 JP JP17003985A patent/JPS6231987A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01159991A (en) * | 1987-12-16 | 1989-06-22 | Nkk Corp | induction heating device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0256794B2 (en) | 1990-12-03 |
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