JP5659094B2 - Induction heating device - Google Patents

Induction heating device Download PDF

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JP5659094B2
JP5659094B2 JP2011147984A JP2011147984A JP5659094B2 JP 5659094 B2 JP5659094 B2 JP 5659094B2 JP 2011147984 A JP2011147984 A JP 2011147984A JP 2011147984 A JP2011147984 A JP 2011147984A JP 5659094 B2 JP5659094 B2 JP 5659094B2
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heated
width direction
heating coil
induction heating
copper tube
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JP2013016341A (en
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英二 橋本
英二 橋本
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Toshiba Mitsubishi Electric Industrial Systems Corp
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Toshiba Mitsubishi Electric Industrial Systems Corp
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Priority to KR1020110099487A priority patent/KR101312729B1/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0227—Applications
    • H05B1/023—Industrial applications
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/40—Establishing desired heat distribution, e.g. to heat particular parts of workpieces

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)

Description

本発明は、例えば鉄鋼用熱間圧延ラインのような製鋼ラインに設置され、搬送される被加熱材を連続的に加熱する誘導加熱装置に関する。   The present invention relates to an induction heating apparatus that is installed in a steel making line such as a hot rolling line for steel and continuously heats a material to be heated.

誘導加熱装置は、交流電源に接続された加熱コイルを被加熱材の周辺に配置し、鎖交磁束により誘起される渦電流のジュール熱で被加熱材を加熱する。この誘導加熱装置として銅管を巻回した加熱コイル内に被加熱材を通して加熱するソレノイド型誘導加熱装置が広く知られている。   The induction heating device arranges a heating coil connected to an AC power supply around the material to be heated, and heats the material to be heated by Joule heat of eddy current induced by interlinkage magnetic flux. As this induction heating device, a solenoid type induction heating device that heats a material to be heated in a heating coil in which a copper tube is wound is widely known.

図６、図７において、従来のソレノイド型誘導加熱装置を示す。図６は例えば特許文献１などに示された従来のソレノイド型誘導加熱装置の構成を示す側断面図である。図７は図６における誘導加熱装置を示す正面図である。加熱コイル３は、被加熱材１の幅方向を周回するように楕円形状に銅管を巻回して形成される。耐熱部材４は、加熱コイル３の内側に配置され、被加熱材１の通路を形成する。コの字型鉄心５は、加熱コイル３の外側の磁路に沿って、被加熱材１の幅方向に複数個並設されている。   6 and 7 show a conventional solenoid type induction heating apparatus. FIG. 6 is a side sectional view showing a configuration of a conventional solenoid induction heating apparatus disclosed in, for example, Patent Document 1. FIG. 7 is a front view showing the induction heating apparatus in FIG. The heating coil 3 is formed by winding an elliptical copper tube around the width direction of the material 1 to be heated. The heat-resistant member 4 is disposed inside the heating coil 3 and forms a passage for the heated material 1. A plurality of U-shaped iron cores 5 are juxtaposed in the width direction of the material to be heated 1 along the magnetic path outside the heating coil 3.

一般に、粗圧延された板状の被加熱材１は、テーブルローラ２によって搬送され次工程に送られる間に放熱して温度が低下する。そこで、誘導加熱装置を配置し、誘導加熱装置は、被加熱材１を加熱コイル３の内側に形成される通路内を通過させ、被加熱材１を誘導加熱することにより、搬送中の温度低下を補償している。   In general, the roughly heated plate-shaped heated material 1 is radiated while being transported by the table roller 2 and sent to the next process, and the temperature is lowered. Therefore, an induction heating device is disposed, and the induction heating device causes the material to be heated 1 to pass through a passage formed inside the heating coil 3 and induction-heats the material to be heated 1 to reduce the temperature during conveyance. Is compensated.

このように、従来のソレノイド型誘導加熱装置は、被加熱材１の搬送中の温度低下補償を目的としていた。しかしながら、磁束量は、加熱コイル３を形成する銅管近傍であるほど多いため、被加熱材１と加熱コイル３を形成する銅管との物理的な距離の遠近により、被加熱材幅方向で温度差が生じていた。   As described above, the conventional solenoid induction heating apparatus is intended to compensate for a temperature drop during the conveyance of the material to be heated 1. However, since the amount of magnetic flux is so large that it is near the copper tube which forms the heating coil 3, it depends on the distance of the physical distance between the heated material 1 and the copper tube which forms the heating coil 3 in the width direction of the heated material. There was a temperature difference.

特に、パイプやビレットなどの鉄鋼製品を、ソレノイド型誘導加熱装置を用いて複数本同時加熱する場合においては、被加熱材幅方向中央部に位置するものよりも幅方向端部に位置するものが、加熱コイル３とパイプやビレットとが物理的に近距離にあった。このため、幅方向端部の鎖交磁束が多くなり加熱されやすい。これによって、幅方向の中央部と端部が均一に加熱されなかった。  In particular, in the case of simultaneously heating a plurality of steel products such as pipes and billets using a solenoid induction heating device, the one located at the end in the width direction is more than the one located in the center in the width direction of the material to be heated. The heating coil 3 and the pipe or billet were physically close to each other. For this reason, the flux linkage at the end in the width direction increases and is easily heated. Thereby, the center part and the edge part of the width direction were not heated uniformly.

加熱コイルを被加熱材周囲に巻回する形式の誘導加熱装置は多分野に亘り利用されており、上記のように複数の長尺形状の被加熱材を取り扱う際の幅方向均熱化を図った誘導加熱装置が提案されている（例えば、特許文献２）。   Induction heating devices of a type in which a heating coil is wound around a material to be heated are used in many fields, and as described above, it is intended to equalize the width direction when handling a plurality of elongate materials to be heated. An induction heating apparatus has been proposed (for example, Patent Document 2).

特許文献２では、光学レンズ等の製造工程において、母型の周囲を巻回する加熱コイルを有するモールドプレス成型装置を用いている。均熱性確保のために、従来発熱量の小さい位置（幅方向中央部）では加熱コイルを被加熱材に接近させ、従来発熱量の大きい位置（幅方向端部）では加熱コイルを被加熱材から遠ざける形状としている。   In Patent Document 2, a mold press molding apparatus having a heating coil that winds around a mother die is used in a manufacturing process of an optical lens or the like. In order to ensure heat uniformity, the heating coil is moved closer to the material to be heated at a position where the conventional heat generation amount is small (the central portion in the width direction), and the heating coil is moved from the material to be heated at a position where the conventional heat generation amount is large (the end portion in the width direction) The shape is kept away.

また、特許文献２は、被加熱材の発熱量に応じて加熱コイルの接近量を調整可能とし、これにより、被加熱材の温度制御をきめ細かく行えることを特長としている。   Further, Patent Document 2 is characterized in that the approaching amount of the heating coil can be adjusted according to the heat generation amount of the heated material, and thereby the temperature of the heated material can be finely controlled.

特開平１０−１３４９４９号公報Japanese Patent Laid-Open No. 10-134949 特開２００４―２６９３３９号公報JP 2004-269339 A

しかしながら、特許文献２の目的は、あくまでも複数の長尺形状の被加熱材の均熱達成であり、幅方向の温度分布を制御すること、例えば端部や中央部などの特定部位の温度を上げるような特長までは持ち合わせていない。   However, the purpose of Patent Document 2 is to achieve soaking of a plurality of elongated materials to be heated, and to control the temperature distribution in the width direction, for example, to increase the temperature of a specific part such as an end or a center. I do not have such features.

また、従来のソレノイド型誘導加熱装置では、被加熱材幅方向中央部に位置する部分よりも幅方向端部に位置する部分が、加熱コイルを形成する銅管と近くなり、幅方向端部の鎖交磁束が多くなるため、被加熱材幅方向における端部と中央部で加熱温度に温度差が生じていた。   Further, in the conventional solenoid type induction heating device, the portion located at the end in the width direction is closer to the copper tube forming the heating coil than the portion located at the center in the width direction of the material to be heated. Since the interlinkage magnetic flux increases, there is a temperature difference in the heating temperature between the end portion and the center portion in the heated material width direction.

本発明は上記課題を解決するためになされたものであり、被加熱材の幅方向の均熱を図るとともに、幅方向中央部・端部の昇温、変熱を含めた幅方向温度制御を達成する誘導加熱装置を提供することにある。   The present invention has been made in order to solve the above-mentioned problems, and it is intended to perform soaking in the width direction of the material to be heated, and to perform temperature control in the width direction including temperature rise and heat change at the center and end of the width direction. It is to provide an induction heating device to achieve.

上記課題を解決するために、本発明における誘導加熱装置は、以下のような手段を有している。   In order to solve the above problems, the induction heating apparatus according to the present invention has the following means.

請求項１記載の誘導加熱装置は、導電部材が被加熱材の幅方向を周回するように巻回され且つ入口側から出口側に前記被加熱材が挿通される加熱コイルと、前記加熱コイルの入口側及び出口側のそれぞれに前記加熱コイルに対向して設置され且つ前記被加熱材の幅方向を周回するように巻回された閉ループ状のシールド銅管と、前記加熱コイルの上下面に設置されたコの字型鉄心とを備え、前記シールド銅管は、前記被加熱材の幅方向に対して、前記加熱コイルに近接する近接部と前記加熱コイルから遠ざかる遠隔部とが形成されてなることを特徴とする。 Induction heating apparatus comprising a heating coil conductive member the material to be heated from the wound and the inlet side to the outlet side so as to surround the width direction of the material to be heated is inserted, the heating coil Closed loop shield copper pipes installed on the inlet side and the outlet side so as to face the heating coil and wound around the width direction of the heated material, and installed on the upper and lower surfaces of the heating coil The shielded copper pipe is formed with a proximity part close to the heating coil and a remote part away from the heating coil in the width direction of the material to be heated. It is characterized by that.

請求項２記載の前記コの字型鉄心は、前記加熱コイルの上下面で且つ前記被加熱材の温度を上昇させたい箇所に配置されることを特徴とする。   The said U-shaped iron core of Claim 2 is arrange | positioned in the location which wants to raise the temperature of the said to-be-heated material on the upper and lower surfaces of the said heating coil.

請求項３記載の前記シールド銅管は、前記被加熱材の幅方向端部に前記近接部が形成され、前記被加熱材の幅方向中央部に前記遠隔部が形成されていることを特徴とする。   The shield copper pipe according to claim 3, wherein the proximity portion is formed at an end portion in the width direction of the heated material, and the remote portion is formed at a center portion in the width direction of the heated material. To do.

請求項１に係る誘導加熱装置によれば、被加熱材の幅方向を周回するように巻回された閉ループ状のシールド銅管が加熱コイルと近接する近接部は、シールド銅管に、加熱コイルに流れる電流とは逆向きの誘起電流が流れることにより被加熱材の鎖交磁束を弱める。加熱コイルから遠ざかる遠隔部は、シールド銅管に流れる逆向きの誘起電流が被加熱材の鎖交磁束量に影響を及ぼさない十分な距離を持たせることで、加熱に寄与する鎖交磁束量を幅方向で調節することにより被加熱材幅方向の温度を制御できる。

According to the induction heating apparatus of the first aspect, the proximity portion in which the closed loop shield copper tube wound so as to circulate in the width direction of the material to be heated is adjacent to the heating coil is connected to the shield copper tube. The interlinkage magnetic flux of the material to be heated is weakened by the induced current flowing in the direction opposite to the current flowing through the material. The remote part away from the heating coil has a sufficient distance that the induced current flowing in the shield copper tube does not affect the amount of interlinkage flux of the material to be heated. The temperature in the width direction of the heated material can be controlled by adjusting in the width direction.

本発明の請求項２に係る誘導加熱装置において、加熱コイル上下面にコの字型鉄心を配置することにより、その部分の磁束量を集中でき、その部分の被加熱材温度をより上昇させることができる。   In the induction heating device according to claim 2 of the present invention, by arranging the U-shaped iron cores on the upper and lower surfaces of the heating coil, the amount of magnetic flux in that portion can be concentrated, and the temperature of the heated material in that portion can be further increased. Can do.

例えば、被加熱材幅方向中央部を、より昇温させたいとき、コの字型鉄心を加熱コイル上下面の中央部に配置することにより幅方向中央部の加熱に寄与する磁束量が増え、幅方向中央部の昇温が可能となる。   For example, when it is desired to further raise the temperature of the heated material width direction central part, the amount of magnetic flux contributing to the heating of the width direction central part is increased by arranging the U-shaped iron core at the central part of the upper and lower surfaces of the heating coil, It is possible to raise the temperature in the center in the width direction.

本発明における第１の実施の形態に係る鉄鋼用ソレノイド型誘導加熱装置を示す斜視図である。It is a perspective view which shows the solenoid type induction heating apparatus for steel which concerns on 1st Embodiment in this invention. 本発明における第１の実施の形態に係る鉄鋼用ソレノイド型誘導加熱装置の通電方向と磁束方向を説明するための上面図である。It is a top view for demonstrating the electricity supply direction and magnetic flux direction of the solenoid type induction heating apparatus for steel which concerns on 1st Embodiment in this invention. 本発明における第１の実施の形態に係る鉄鋼用ソレノイド型誘導加熱装置の幅方向中央部と幅方向端部の通電方向と磁束方向を説明するための側面図である。It is a side view for demonstrating the energization direction and magnetic flux direction of the width direction center part and width direction edge part of the solenoid type induction heating apparatus for steel which concern on 1st Embodiment in this invention. 本発明における第１の実施の形態に係る鉄鋼用ソレノイド型誘導加熱装置の幅方向中央部の通電方向と磁束方向を説明するための斜視図である。It is a perspective view for demonstrating the energization direction and magnetic flux direction of the center part of the width direction of the solenoid type induction heating apparatus for steel which concerns on 1st Embodiment in this invention. 本発明における第２の実施の形態に係る鉄鋼用ソレノイド型誘導加熱装置を示す斜視図である。It is a perspective view which shows the solenoid type induction heating apparatus for steel which concerns on 2nd Embodiment in this invention. 従来の鉄鋼用ソレノイド型誘導加熱装置を示す側断面図である。It is a sectional side view which shows the conventional solenoid type induction heating apparatus for steel. 従来の鉄鋼用ソレノイド型誘導加熱装置を示す正面図である。It is a front view which shows the conventional solenoid type induction heating apparatus for steel.

（第１の実施の形態）
以下、本発明に係る第１の実施の形態のソレノイド型誘導加熱装置を図１〜図４に基づいて詳細に説明する。 (First embodiment)
Hereinafter, a solenoid type induction heating apparatus according to a first embodiment of the present invention will be described in detail with reference to FIGS.

図１は、本発明における第１の実施の形態に係る鉄鋼用ソレノイド型誘導加熱装置を示す斜視図である。図１において、加熱コイル３は、電流が流れる導電部材としての銅管が図３に示す被加熱材１を覆うように複数巻回され、コイル入口側からコイル出口側に被加熱材１が挿通されるようになっている。   FIG. 1 is a perspective view showing a solenoid induction heating apparatus for steel according to a first embodiment of the present invention. In FIG. 1, the heating coil 3 is wound a plurality of times so that a copper tube as a conductive member through which current flows covers the material to be heated 1 shown in FIG. 3, and the material to be heated 1 is inserted from the coil inlet side to the coil outlet side. It has come to be.

図１では、被加熱材１の幅方向端部と加熱コイル３の物理的距離の近さによる加熱特性を是正するために、被加熱材１の幅方向の鎖交磁束量を調整するためのコの字型鉄心５と、凸型シールド銅管６とが配置されている。  In FIG. 1, in order to correct the heating characteristics due to the close physical distance between the width direction end of the heated material 1 and the heating coil 3, the amount of flux linkage in the width direction of the heated material 1 is adjusted. A U-shaped iron core 5 and a convex shield copper tube 6 are arranged.

コの字型鉄心５は、加熱コイル３の上下面で且つ被加熱材１の温度を上昇させたい箇所に配置されている。  The U-shaped iron core 5 is disposed on the upper and lower surfaces of the heating coil 3 and at a location where the temperature of the heated material 1 is to be increased.

凸型シールド銅管６は、加熱コイル３の入口側及び出口側（開口部分）に配置され、被加熱材１の幅方向に対して、加熱コイル３に近接する近接部６ａと加熱コイル３から遠ざかる遠隔部６ｂとが形成されてなる。図１に示す例では、シールド銅管６は、被加熱材１の幅方向端部に近接部６ａが形成され、被加熱材１の幅方向中央部に遠隔部６ｂが形成されている。  The convex shield copper tube 6 is disposed on the inlet side and the outlet side (opening portion) of the heating coil 3, and from the proximity portion 6 a and the heating coil 3 adjacent to the heating coil 3 in the width direction of the heated material 1. The remote part 6b which goes away is formed. In the example shown in FIG. 1, the shield copper tube 6 has a proximity portion 6 a formed at the end in the width direction of the heated material 1 and a remote portion 6 b formed at the center in the width direction of the heated material 1.

図２は、加熱コイル３の通電方向を一方向に仮定した場合の、加熱コイル３及び凸型シールド銅管６に流れる電流方向と磁束方向を示した上面図である。図３は、加熱コイル３の通電方向を一方向に仮定した場合の、加熱コイル３及び凸型シールド銅管６に流れる電流方向と磁束方向を示した側面図である。なお、図３では凸型シールド銅管６の幅方向端部の効果を明確化するため、幅方向中央部のコの字型鉄心５は図示していない。   FIG. 2 is a top view showing a current direction and a magnetic flux direction flowing in the heating coil 3 and the convex shield copper tube 6 when the energization direction of the heating coil 3 is assumed to be one direction. FIG. 3 is a side view showing a current direction and a magnetic flux direction flowing through the heating coil 3 and the convex shield copper tube 6 when the energization direction of the heating coil 3 is assumed to be one direction. In addition, in order to clarify the effect of the width direction edge part of the convex shield copper tube 6 in FIG. 3, the U-shaped iron core 5 of the width direction center part is not illustrated.

この例では、凸型シールド銅管６により加熱コイル３と近接する近接部６ａが被加熱材１の幅方向端部に形成される。幅方向端部では、加熱コイル３に流れる電流Ｉａの変化により磁束Φ１が発生し、電流Ｉａにより凸型シールド銅管６に流れる逆向きの誘起電流Ｉｂが誘起され、逆向きの誘起電流Ｉｂにより磁束Φ２が発生する。このため、被加熱材１の鎖交磁束Φ１，Φ２が図２、図３の円枠部で相殺方向となることで弱まる。  In this example, a proximity portion 6 a that is close to the heating coil 3 is formed at the end in the width direction of the heated material 1 by the convex shield copper tube 6. At the end in the width direction, a magnetic flux Φ1 is generated by a change in the current Ia flowing through the heating coil 3, and a reverse induced current Ib flowing through the convex shield copper tube 6 is induced by the current Ia. Magnetic flux Φ2 is generated. For this reason, the interlinkage magnetic fluxes Φ1 and Φ2 of the material to be heated 1 are weakened by being in the canceling direction in the circular frame portions of FIGS.

一方、加熱コイル３から遠ざかる遠隔部６ｂは、幅方向中央部に形成されることにより、凸型シールド銅管６に流れる逆向きの誘起電流Ｉｂが被加熱材１の中央部の鎖交磁束量においては影響を及ぼさない。即ち、シールド銅管６に流れる逆向きの誘起電流Ｉｂが被加熱材１の鎖交磁束量に影響を及ぼさない十分な距離を持たせることにより、幅方向中央部では、磁束が幅方向端部よりも効率的に被加熱材１に鎖交され、幅方向中央部の温度は上昇する。即ち、加熱に寄与する鎖交磁束量を被加熱材１の幅方向で調節することにより被加熱材１の幅方向の温度を制御できる。   On the other hand, the remote portion 6b moving away from the heating coil 3 is formed in the center portion in the width direction, so that the reverse induced current Ib flowing in the convex shield copper tube 6 causes the amount of interlinkage magnetic flux in the center portion of the heated material 1. Does not have any effect. That is, by providing a sufficient distance so that the reverse induced current Ib flowing through the shielded copper tube 6 does not affect the amount of flux linkage of the material to be heated 1, the magnetic flux is at the end in the width direction at the center in the width direction. More efficiently, the material to be heated is linked to the material to be heated 1, and the temperature in the center in the width direction rises. That is, the temperature in the width direction of the heated material 1 can be controlled by adjusting the amount of flux linkage that contributes to heating in the width direction of the heated material 1.

図４は幅方向中央部の通電方向と磁束方向を説明するための斜視図である。コの字型鉄心５を被加熱材１の幅方向中央部に配置したことにより、被加熱材１の幅方向中央部の磁束は幅方向端部より効率的に被加熱材１に鎖交され、幅方向中央部の温度は上昇する。   FIG. 4 is a perspective view for explaining the energization direction and the magnetic flux direction in the central portion in the width direction. By arranging the U-shaped iron core 5 at the center in the width direction of the material to be heated 1, the magnetic flux at the center in the width direction of the material to be heated 1 is linked to the material to be heated 1 more efficiently than the end in the width direction. The temperature at the center in the width direction rises.

このように、実施例１のソレノイド型誘導加熱装置によれば、加熱コイル３に近接する近接部６ａと加熱コイル３から遠ざかる遠隔部６ｂを有するシールド銅管６と、コの字型鉄心５とを備えたので、被加熱材の幅方向の均熱を図るとともに、被加熱材１の幅方向の温度分布を柔軟に制御でき、例えば端部や中央部などの特定部位の温度を上げることもできる。   Thus, according to the solenoid type induction heating device of the first embodiment, the shield copper pipe 6 having the proximity portion 6a close to the heating coil 3 and the remote portion 6b far from the heating coil 3, the U-shaped iron core 5, Therefore, the temperature distribution in the width direction of the material to be heated can be uniformly controlled, and the temperature distribution in the width direction of the material to be heated 1 can be flexibly controlled. For example, the temperature of a specific part such as an end portion or a central portion can be increased. it can.

（第２の実施の形態）
図５は、本発明における第２の実施の形態に係る鉄鋼用ソレノイド型誘導加熱装置を示す斜視図である。第２の実施の形態は、シールド銅管６Ａは、被加熱材１の幅方向端部に遠隔部６ｄが形成され、被加熱材１の幅方向中央部に近接部６ｃが形成されている。また、コの字型鉄心５Ａを加熱コイル３の両端部の上下面に配置している。 (Second Embodiment)
FIG. 5 is a perspective view showing a solenoid type induction heating device for steel according to a second embodiment of the present invention. In the second embodiment, the shield copper tube 6 </ b> A has a remote portion 6 d formed at the end in the width direction of the heated material 1, and a proximity portion 6 c formed at the center in the width direction of the heated material 1. Further, the U-shaped iron core 5 </ b> A is disposed on the upper and lower surfaces of both ends of the heating coil 3.

このように、実施例２の誘導加熱装置によれば、幅方向中央部に形成された近接部６ｃを加熱コイル３と近接させ、幅方向端部に形成された遠隔部６ｄを加熱コイル３と遠ざかる形状となる、いわば凹型のシールド銅管６Ａを加熱コイル３の入出口側双方に配置することにより、幅方向中央部の加熱を抑制することができる。   Thus, according to the induction heating apparatus of Example 2, the proximity portion 6c formed at the center in the width direction is brought close to the heating coil 3, and the remote portion 6d formed at the end in the width direction is connected to the heating coil 3. By disposing the so-called concave shield copper pipe 6 </ b> A, which is in a shape that moves away, on both the entrance and exit sides of the heating coil 3, heating in the center portion in the width direction can be suppressed.

また、コの字型鉄心５Ａを加熱コイル３の両端分の上下面に配置することにより、幅方向端部の温度を上昇させることができる。   Further, by arranging the U-shaped iron core 5A on the upper and lower surfaces corresponding to both ends of the heating coil 3, the temperature at the end in the width direction can be raised.

なお、本発明は、シールド銅管６の被加熱材１の幅方向に対する凹凸形状の位置については幅方向中央部や幅方向端部の位置に限定されることなく、幅方向のその他の位置であっても良い。   In the present invention, the position of the uneven shape with respect to the width direction of the heated material 1 of the shield copper tube 6 is not limited to the position of the center portion in the width direction or the position of the end portion in the width direction, but at other positions in the width direction. There may be.

本発明は、鉄鋼用熱間圧延ラインで運用される誘導加熱装置に適用可能である。   The present invention is applicable to an induction heating apparatus operated in a hot rolling line for steel.

１ 被加熱材
２ テーブルローラ
３ 加熱コイル
４ 耐熱部材
５ コの字型鉄心
６ 凸型シールド銅管
６ａ，６ｃ 近接部
６ｂ，６ｄ 遠隔部 DESCRIPTION OF SYMBOLS 1 Material to be heated 2 Table roller 3 Heating coil 4 Heat-resistant member 5 U-shaped iron core 6 Convex shield copper tube 6a, 6c Proximity part 6b, 6d Remote part

Claims (4)

導電部材が被加熱材の幅方向を周回するように巻回され且つ入口側から出口側に前記被加熱材が挿通される加熱コイルと、
前記加熱コイルの入口側及び出口側のそれぞれに前記加熱コイルに対向して設置され且つ前記被加熱材の幅方向を周回するように巻回された閉ループ状のシールド銅管と、
前記加熱コイルの上下面に設置されたコの字型鉄心とを備え、
前記シールド銅管は、前記被加熱材の幅方向に対して、前記加熱コイルに近接する近接部と前記加熱コイルから遠ざかる遠隔部とが形成されてなることを特徴とする誘導加熱装置。 A heating coil conductive member the material to be heated from the wound and the inlet side to the outlet side so as to surround the width direction of the material to be heated is inserted,
A closed loop shielded copper tube that is installed on each of the inlet side and the outlet side of the heating coil so as to face the heating coil and wound around the width direction of the material to be heated ;
A U-shaped iron core installed on the upper and lower surfaces of the heating coil;
The induction heating apparatus, wherein the shield copper tube is formed with a proximity part close to the heating coil and a remote part away from the heating coil in the width direction of the material to be heated. 前記コの字型鉄心は、前記加熱コイルの上下面で且つ前記被加熱材の温度を上昇させたい箇所に配置されることを特徴とする請求項１記載の誘導加熱装置。   The induction heating apparatus according to claim 1, wherein the U-shaped iron core is disposed on the upper and lower surfaces of the heating coil and at a location where the temperature of the heated material is to be increased. 前記シールド銅管は、前記被加熱材の幅方向端部に前記近接部が形成され、前記被加熱材の幅方向中央部に前記遠隔部が形成されていることを特徴とする請求項１又は請求項２記載の誘導加熱装置。   2. The shield copper tube, wherein the proximity portion is formed at an end portion in the width direction of the material to be heated, and the remote portion is formed at a center portion in the width direction of the material to be heated. The induction heating apparatus according to claim 2. 前記シールド銅管は、前記被加熱材の幅方向端部に前記遠隔部が形成され、前記被加熱材の幅方向中央部に前記近接部が形成されていることを特徴とする請求項１又は請求項２記載の誘導加熱装置。   2. The shield copper tube, wherein the remote portion is formed at an end portion in the width direction of the heated material, and the proximity portion is formed at a central portion in the width direction of the heated material. The induction heating apparatus according to claim 2.
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