JP3510167B2 - High frequency heating method - Google Patents
High frequency heating methodInfo
- Publication number
- JP3510167B2 JP3510167B2 JP34686899A JP34686899A JP3510167B2 JP 3510167 B2 JP3510167 B2 JP 3510167B2 JP 34686899 A JP34686899 A JP 34686899A JP 34686899 A JP34686899 A JP 34686899A JP 3510167 B2 JP3510167 B2 JP 3510167B2
- Authority
- JP
- Japan
- Prior art keywords
- heating coil
- heated
- heating
- heat
- current
- 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 - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- General Induction Heating (AREA)
- Heat Treatment Of Articles (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高周波電流を用い
て鉄系素材、鉄系製品などを加熱する技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for heating an iron-based material, an iron-based product, etc. using a high frequency current.
【０００２】[0002]
【従来の技術】従来、鉄鋼製品の溶接後熱処理などで実
施されている加熱装置として、図１１に示すような高周
波誘導加熱装置が使用されている。2. Description of the Related Art Conventionally, a high-frequency induction heating device as shown in FIG. 11 has been used as a heating device which is used for post-weld heat treatment of steel products.
【０００３】この高周波誘導加熱装置は、交流電源を直
流電流にする順変換回路９０、直流電流を高周波電流に
する逆変換回路９１、逆変換回路９１からの高周波電流
の電気レベルを加熱コイル９４の定格（電圧と電流）に
合わせる整合回路９２、高周波電流の通電により磁束を
発生して被加熱物９３を昇温させる加熱コイル９４、被
加熱物９３の発熱から加熱コイル９４を保護するととも
に加熱コイル９４から被加熱物９３への漏電防止のため
の絶縁性断熱材９６、および発熱部分を冷却するための
冷却装置９５などによって構成されている。In this high-frequency induction heating apparatus, a forward conversion circuit 90 for converting an alternating current power source into a direct current, an inverse conversion circuit 91 for converting a direct current into a high frequency current, and an electric level of the high frequency current from the inverse conversion circuit 91 in a heating coil 94. A matching circuit 92 that matches the rating (voltage and current), a heating coil 94 that generates a magnetic flux by applying a high-frequency current to raise the temperature of the object to be heated 93, and protects the heating coil 94 from heat generation of the object to be heated 93 and a heating coil. It is composed of an insulating heat insulating material 96 for preventing electric leakage from 94 to the object to be heated 93, a cooling device 95 for cooling a heat generating portion, and the like.
【０００４】高周波電流の通電によって加熱コイル９４
から発生する磁束が被加熱物９３と交差すると、被加熱
物９３内に高周波の渦電流が発生し、この電流が被加熱
物９３の固有抵抗に応じて流れることによって発熱す
る。The heating coil 94 is energized by applying a high frequency current.
When the magnetic flux generated from the object 93 crosses the object 93 to be heated, a high-frequency eddy current is generated in the object 93 to be heated, and this current flows according to the specific resistance of the object 93 to be heated to generate heat.
【０００５】実際の施工では、被加熱物９３の材質、形
状、熱処理条件などに対応して被加熱物９３に加えられ
る電力を調整する必要があるが、この場合、整合回路９
２を構成するトランス（図示せず）のタップを切り替え
ることにより、加熱コイル９４に通電される電圧、電流
を変化させている。In actual construction, it is necessary to adjust the electric power applied to the object to be heated 93 in accordance with the material, shape, heat treatment conditions, etc. of the object to be heated 93. In this case, the matching circuit 9
By switching the taps of the transformer (not shown) that constitutes No. 2, the voltage and current supplied to the heating coil 94 are changed.
【０００６】[0006]
【発明が解決しようとする課題】高周波誘導加熱は、加
熱コイルに９４流す高周波電流によって磁束を発生さ
せ、その磁束が被加熱物９３を通過することにより被加
熱物９３に発生する誘導電流で被加熱物９３自体を発熱
させる方式であるため、加熱コイル９４と被加熱物９３
との隙間は極力小さくする必要がある。In the high frequency induction heating, magnetic flux is generated by the high frequency current flowing through the heating coil 94, and the magnetic flux passes through the object 93 to be heated. Since the heating object 93 itself generates heat, the heating coil 94 and the object to be heated 93 are heated.
The gap between and should be as small as possible.
【０００７】ところが、６００℃〜７００℃程度まで昇
温させる必要がある被加熱物９３に加熱コイル９４を近
づけすぎると、加熱コイル９４の温度が自身の耐熱温度
を超えてしまい、加熱コイル９４が損傷、溶断すること
があるため、図に示すように、被加熱物９３と加熱コイ
ル９４との間に絶縁性断熱材９６を介在させる必要があ
る。したがって、被加熱物９３と加熱コイル９４との隙
間をある限度より小さくすることは困難であり、電流効
率向上の阻害要因の一つとなっている。However, if the heating coil 94 is brought too close to the object to be heated 93 that needs to be heated to about 600 ° C. to 700 ° C., the temperature of the heating coil 94 exceeds its own heat resistance temperature, and the heating coil 94 is heated. Since it may be damaged or melted, it is necessary to interpose an insulating heat insulating material 96 between the object to be heated 93 and the heating coil 94 as shown in the figure. Therefore, it is difficult to make the gap between the object to be heated 93 and the heating coil 94 smaller than a certain limit, which is one of the factors that hinder the improvement of current efficiency.
【０００８】また、絶縁性断熱材９６のみでは加熱コイ
ル９４の過熱を阻止できないことがあり、この場合、中
空素材の加熱コイルを使用し、中空部分に水や空気を通
して加熱コイル自体を冷却する方式が採用されている
が、構造が複雑であり、据え付けや撤収作業などにも多
大な労力と時間が必要である。In some cases, the insulating heat insulating material 96 alone cannot prevent overheating of the heating coil 94. In this case, a heating coil made of a hollow material is used and water or air is passed through the hollow portion to cool the heating coil itself. However, the structure is complicated, and a lot of labor and time are required for installation and removal work.
【０００９】本発明が解決しようとする課題は、被加熱
物を効率的に昇温させることができ、加熱コイルの冷却
が不要で、装置の据え付けや撤収作業が比較的容易な高
周波加熱技術を提供することにある。The problem to be solved by the present invention is to provide a high-frequency heating technique capable of efficiently raising the temperature of an object to be heated, requiring no cooling of a heating coil, and relatively easy to install or remove the device. To provide.
【００１０】[0010]
【課題を解決するための手段】前記課題を解決するた
め、本発明の高周波加熱方法は、通電によって発熱する
電熱線で製作した加熱コイルを被加熱物の露出面に電気
的絶縁状態に配置し、この加熱コイルに高周波電流を流
して被加熱物を昇温させることを特徴とする。このよう
な方法により、被加熱物は加熱コイルの発熱で加熱され
るとともに被加熱物に生じる誘導電流で被加熱物自体が
発熱するため、被加熱物を効率的に昇温させることがで
きる。In order to solve the above-mentioned problems, in the high-frequency heating method of the present invention, a heating coil made of a heating wire that generates heat when energized is arranged in an electrically insulated state on the exposed surface of the object to be heated. A high-frequency current is passed through the heating coil to raise the temperature of the object to be heated. By such a method, the object to be heated is heated by the heat generated by the heating coil and the object to be heated itself generates heat due to the induced current generated in the object to be heated, so that the object to be heated can be efficiently heated.
【００１１】ここで用いる電熱線としては、被加熱物の
加熱温度以上の耐熱性を有するとともに、被加熱物に対
して誘導電流を発生させることのできる材質のものを使
用することが必要である。このような材質としては、た
とえばＮｉ−Ｃｒ−Ｆｅ系、Ｆｅ−Ｃｒ−Ａｌ系、Ｆｅ
−Ｃｒ−Ｃｏ−Ａｌ系の合金が挙げられる。これらの合
金は、電気抵抗率が７〜１４５μΩ・ｃｍ（２０℃）
で、耐熱温度が１０００〜１４００℃程度であり、これ
らの合金で製作した加熱コイルに１本あたり２００〜６
００Ｖ、３０〜１００Ａ程度の高周波電流を通電するこ
とにより、加熱コイルは５００〜１０００℃程度に発熱
して被加熱物を加熱し、同時に被加熱物に誘導電流を生
じせしめて被加熱物を加熱する。As the heating wire used here, it is necessary to use a material having heat resistance equal to or higher than the heating temperature of the object to be heated and capable of generating an induced current to the object to be heated. . As such a material, for example, Ni-Cr-Fe system, Fe-Cr-Al system, Fe
-Cr-Co-Al type alloys can be mentioned. These alloys have an electrical resistivity of 7 to 145 μΩ · cm (20 ° C)
And, the heat resistant temperature is about 1000 to 1400 ° C, and the heating coil made of these alloys has 200 to 6 per coil.
When a high-frequency current of about 00 V and about 30 to 100 A is applied, the heating coil generates heat at about 500 to 1000 ° C. to heat the object to be heated, and at the same time, an induced current is generated in the object to be heated to heat the object to be heated. To do.
【００１２】前記高周波加熱方法において、少なくとも
加熱コイルおよび加熱コイルが配置されている被加熱物
の露出面を断熱材で被覆することが望ましい。これによ
り、加熱コイルや被加熱物からの放熱が抑制されるの
で、電流効率が向上する。In the high-frequency heating method, it is desirable that at least the heating coil and the exposed surface of the object to be heated on which the heating coil is arranged are covered with a heat insulating material. Thereby, heat radiation from the heating coil and the object to be heated is suppressed, so that the current efficiency is improved.
【００１３】また、本発明の高周波加熱装置は、通電に
よって発熱する電熱線で製作した加熱コイルと、加熱コ
イルと被加熱物との間の電気的絶縁手段と、加熱コイル
に高周波電流を供給する高周波電源とを備えたことを特
徴とする。このような構成とすることにより、被加熱物
を効率的に加熱することができるとともに、加熱コイル
は電熱線で製作されているので冷却装置が不要で、構造
の簡素化が可能であり、装置の据え付けや撤収作業も比
較的容易となる。Further, the high frequency heating apparatus of the present invention supplies a high frequency current to the heating coil, which is made of a heating wire which generates heat when energized, an electrically insulating means between the heating coil and the object to be heated, and the heating coil. It is provided with a high frequency power supply. With such a configuration, the object to be heated can be efficiently heated, and since the heating coil is made of a heating wire, a cooling device is not required and the structure can be simplified. Installation and withdrawal work will be relatively easy.
【００１４】前記電気的絶縁手段は、電熱線に複数の耐
熱性絶縁体を数珠状に取り付ける構成とすることができ
る。このような構成とすることにより、被加熱物の露出
面に耐熱性絶縁体が接触する状態にまで、加熱コイルを
被加熱物に接近させて配置することができるので、電流
効率が向上し、かつ漏電も防止できる。数珠状に取り付
けられた耐熱性絶縁体は、電熱線の屈曲変形を妨げない
ので被加熱物の露出面の形状に沿って加熱コイルを形成
可能であり、セッティング性が良好である。The electrical insulation means may be constructed such that a plurality of heat resistant insulators are attached to the heating wire in a beaded shape. With such a configuration, the heating coil can be placed close to the object to be heated until the heat-resistant insulator comes into contact with the exposed surface of the object to be heated, so that the current efficiency is improved, In addition, leakage can be prevented. Since the heat-resistant insulator attached in a beaded shape does not hinder the bending deformation of the heating wire, the heating coil can be formed along the shape of the exposed surface of the object to be heated, and the setting property is good.
【００１５】[0015]
【発明の実施の形態】図１は実施の形態である高周波加
熱装置を示す構成図、図２は前記高周波加熱装置の一部
切欠斜視図、図３は図１のＡ−Ａ線における断面図、図
４は図１のＢ−Ｂ線における断面図である。1 is a block diagram showing a high frequency heating apparatus according to an embodiment, FIG. 2 is a partially cutaway perspective view of the high frequency heating apparatus, and FIG. 3 is a sectional view taken along line AA of FIG. 4 is a sectional view taken along the line BB in FIG.
【００１６】本実施形態の高周波加熱装置は、鋼管の溶
接部を加熱するための装置であり、複数のセラミックス
リング１１が数珠状に取り付けられた電熱線１０を被加
熱物１２の外周に巻回して加熱コイル１３が形成され、
加熱コイル１３および加熱コイル１３が配置された被加
熱物１２の外周面が断熱材１４で覆われ、高周波電流を
供給するための高周波電源１５の出力ケーブル１６，１
７が加熱コイル１３に接続されている。The high-frequency heating apparatus of this embodiment is an apparatus for heating a welded portion of a steel pipe. A heating wire 10 having a plurality of ceramic rings 11 attached in a beaded shape is wound around an object 12 to be heated. Heating coil 13 is formed,
The heating coil 13 and the outer peripheral surface of the object to be heated 12 in which the heating coil 13 is arranged are covered with a heat insulating material 14, and output cables 16 and 1 of a high frequency power supply 15 for supplying a high frequency current.
7 is connected to the heating coil 13.
【００１７】高周波電源１５から加熱コイル１３に高周
波電流を供給すると、加熱コイル１３が発熱して被加熱
物１２を加熱するとともに、加熱コイル１３に流れる高
周波電流によって被加熱物１２に生じる誘導電流で被加
熱物１２自体が発熱するため、これら二つの作用によっ
て被加熱物１２を被加熱物を効率的に昇温させることが
できる。When a high-frequency current is supplied from the high-frequency power source 15 to the heating coil 13, the heating coil 13 generates heat to heat the object 12 to be heated, and an induction current generated in the object 12 to be heated by the high-frequency current flowing through the heating coil 13 is generated. Since the article to be heated 12 itself generates heat, the article to be heated 12 can be efficiently heated by these two actions.
【００１８】加熱コイル１３は、耐熱性に優れたＮｉ−
Ｃｒ−Ｆｅ系合金製の電熱線１０で製作されているの
で、空冷装置や水冷装置などの冷却装置が不要であり、
これによって、構造が簡素化されるため、装置の据え付
けや撤収作業も容易となる。The heating coil 13 is made of Ni- which has excellent heat resistance.
Since the heating wire 10 is made of a Cr-Fe alloy, a cooling device such as an air cooling device or a water cooling device is unnecessary,
This simplifies the structure and facilitates installation and removal of the device.
【００１９】加熱コイル１３と被加熱物１２との間の電
気的絶縁手段として、電熱線１０に耐熱性絶縁体である
セラッミクスリング１１が数珠状に取り付けられている
ので、被加熱物１２の露出面にセラッミクスリング１１
を接触させた状態で加熱コイル１３を配置することがで
きる。したがって、被加熱物１２と加熱コイル１３との
距離を極力小さくすることができ、電流効率が向上する
とともに、漏電のおそれもない。また、数珠状に取り付
けたセラッミックスリング１１は、電熱線１０の屈曲変
形を妨げないので、被加熱物１２の外周面形状に沿って
加熱コイル１３を形成することができ、セッティング性
に優れている。As a means for electrical insulation between the heating coil 13 and the object 12 to be heated, a ceramic ring 11, which is a heat-resistant insulator, is attached to the heating wire 10 in a beaded shape, so that the object 12 to be heated is exposed. Ceramic ring 11 on the surface
The heating coil 13 can be arranged in a state where they are in contact with each other. Therefore, the distance between the object to be heated 12 and the heating coil 13 can be made as small as possible, the current efficiency is improved, and there is no risk of leakage. Moreover, since the ceramic ring 11 attached in a beaded shape does not hinder the bending deformation of the heating wire 10, the heating coil 13 can be formed along the outer peripheral surface shape of the object to be heated 12, and the setting property is excellent. ing.
【００２０】また、加熱コイル１３および加熱コイル１
３が配置されている被加熱物１２の外周面が断熱材１４
で被覆されているため、加熱コイル１３や被加熱物１２
からの放熱が抑制され、高い電流効率を維持することが
できる。Further, the heating coil 13 and the heating coil 1
3 is arranged on the outer peripheral surface of the article to be heated 12
Since it is covered with, the heating coil 13 and the object to be heated 12
It is possible to suppress heat radiation from the device and maintain high current efficiency.
【００２１】なお本実施形態は例示であるため、電熱線
はＮｉ−Ｃｒ−Ｆｅ系合金製に限定されるものではな
く、また絶縁体もセラッミクスリングに限定されるもの
ではない。また、高周波電源の出力、周波数なども施工
条件に応じて任意に定めることができる。Since this embodiment is an example, the heating wire is not limited to the Ni--Cr--Fe alloy and the insulator is not limited to the ceramics ring. Further, the output and frequency of the high frequency power source can be arbitrarily determined according to the construction conditions.
【００２２】次に、図５〜図１０を参照して、加熱コイ
ルに関する他の実施の形態について説明する。図５、図
６に示す実施の形態では、複数のセラッミクスリング２
０が数珠状に取り付けられたＮｉ−Ｃｒ−Ｆｅ系合金製
の電熱線２１を被加熱物２２の表面上でドーナツ状に巻
いて加熱コイル２３を形成し、これらの上面を断熱材２
４で被覆している。本実施形態は、被加熱物２２が鋼板
である場合に好適であり、図１〜図４に示す実施形態と
同様、被加熱物２２を効率的に昇温させることができ、
構造が簡素であるため、装置の据え付けや撤収作業も容
易である。Next, another embodiment of the heating coil will be described with reference to FIGS. In the embodiment shown in FIGS. 5 and 6, a plurality of ceramic rings 2 are used.
A heating wire 21 made of a Ni—Cr—Fe alloy, in which 0s are attached in a beaded shape, is wound in a donut shape on the surface of the object 22 to be heated to form a heating coil 23, and the upper surface of these is heat insulating material 2
It is covered with 4. The present embodiment is suitable when the object to be heated 22 is a steel plate, and like the embodiments shown in FIGS. 1 to 4, the object to be heated 22 can be efficiently heated,
Since the structure is simple, it is easy to install and remove the device.
【００２３】図７、図８に示す実施の形態では、複数の
セラッミクスリング２０が数珠状に取り付けられた電熱
線２１を被加熱物２５の表面上で渦巻き状に巻いて加熱
コイル２６を形成し、これらの上面を断熱材２７で被覆
している。本実施形態は、図５、図６に示す実施の形態
より加熱温度が低い場合に好適であり、その他の機能、
効果については図１〜図４に示す実施形態と同様であ
る。In the embodiment shown in FIGS. 7 and 8, a heating wire 21 having a plurality of ceramics rings 20 attached in a beaded shape is spirally wound on the surface of an object to be heated 25 to form a heating coil 26. The upper surfaces of these are covered with a heat insulating material 27. This embodiment is suitable when the heating temperature is lower than those of the embodiments shown in FIGS. 5 and 6, and other functions,
The effect is similar to that of the embodiment shown in FIGS.
【００２４】図９、図１０に示す実施の形態では、複数
のセラッミクスリング２０が数珠状に取り付けられた電
熱線２１を被加熱物２８の表面上で角形リング状に巻い
て加熱コイル３０を形成し、これらの上面を断熱材２９
で被覆している。本実施形態は、図５〜図８に示す実施
の形態より加熱面積が狭い場合に好適であり、その他の
機能、効果については図１〜図４に示す実施形態と同様
である。In the embodiment shown in FIGS. 9 and 10, a heating wire 21 having a plurality of ceramics rings 20 attached in a beaded shape is wound on the surface of the object to be heated 28 in a rectangular ring shape to form a heating coil 30. The upper surface of these with heat insulating material 29
It is covered with. This embodiment is suitable when the heating area is smaller than that of the embodiment shown in FIGS. 5 to 8, and other functions and effects are the same as those of the embodiment shown in FIGS.
【００２５】[0025]
【発明の効果】本発明により、以下に示す効果を奏す
る。The present invention has the following effects.
【００２６】（１）通電によって発熱する電熱線で製作
した加熱コイルを被加熱物の露出面に電気的絶縁状態に
配置し、この加熱コイルに高周波電流を流して被加熱物
を昇温させることにより、被加熱物は加熱コイルの発熱
で加熱されるとともに被加熱物に生じる誘導電流で被加
熱物自体が発熱するため、被加熱物を効率的に昇温させ
ることができる。加熱コイルは電熱線で形成されている
ので冷却が不要であり、構造の簡素化が図られ、装置の
据え付けや撤収作業も比較的容易となる。(1) A heating coil made of a heating wire that generates heat when energized is arranged in an electrically insulated state on the exposed surface of the object to be heated, and a high frequency current is passed through the heating coil to raise the temperature of the object to be heated. As a result, the object to be heated is heated by the heat generated by the heating coil and the object to be heated itself generates heat due to the induced current generated in the object to be heated, so that the object to be heated can be efficiently heated. Since the heating coil is formed of a heating wire, it does not need to be cooled, the structure can be simplified, and the installation and removal work of the device can be relatively easy.
【００２７】（２）加熱コイルおよび加熱コイルが配置
されている被加熱物の露出面を断熱材で被覆することに
より、加熱コイルや被加熱物からの放熱が抑制されるの
で、電流効率が向上する。(2) By covering the heating coil and the exposed surface of the object to be heated on which the heating coil is arranged with a heat insulating material, heat dissipation from the heating coil and the object to be heated is suppressed, so that the current efficiency is improved. To do.
【００２８】（３）電熱線に耐熱性絶縁体を数珠状に取
り付けることにより、被加熱物の露出面に耐熱性絶縁体
が接触する状態にまで加熱コイルを被加熱物に接近させ
て配置することができるので、電流効率が向上し、漏電
も防止できる。数珠状に取り付けられた耐熱性絶縁体
は、電熱線の屈曲変形を妨げないので、被加熱物の露出
面の形状に沿って加熱コイルを形成可能であり、セッテ
ィング性が良好である。(3) By attaching the heat resistant insulator to the heating wire in a beaded shape, the heating coil is placed close to the object to be heated until the heat resistant insulator comes into contact with the exposed surface of the object to be heated. Therefore, the current efficiency is improved and the leakage current can be prevented. Since the heat-resistant insulator attached in a beaded shape does not hinder the bending deformation of the heating wire, the heating coil can be formed along the shape of the exposed surface of the object to be heated, and the setting property is good.
【図１】 実施の形態である高周波加熱装置を示す構成
図である。FIG. 1 is a configuration diagram showing a high-frequency heating device according to an embodiment.
【図２】 図１の高周波加熱装置の一部切欠斜視図であ
る。2 is a partially cutaway perspective view of the high frequency heating device of FIG. 1. FIG.
【図３】 図１のＡ−Ａ線における断面図である。3 is a sectional view taken along the line AA of FIG.
【図４】 図１のＢ−Ｂ線における断面図である。4 is a cross-sectional view taken along the line BB in FIG.
【図５】 加熱コイルに関する他の実施の形態を示す平
面図である。FIG. 5 is a plan view showing another embodiment of the heating coil.
【図６】 図５のＣ−Ｃ線における断面図である。6 is a cross-sectional view taken along the line CC of FIG.
【図７】 加熱コイルに関する他の実施の形態を示す平
面図である。FIG. 7 is a plan view showing another embodiment of the heating coil.
【図８】 図７のＤ−Ｄ線における断面図である。8 is a cross-sectional view taken along the line DD of FIG.
【図９】 加熱コイルに関する他の実施の形態を示す平
面図である。FIG. 9 is a plan view showing another embodiment of the heating coil.
【図１０】 図９のＥ−Ｅ線における断面図である。10 is a cross-sectional view taken along the line EE of FIG.
【図１１】 従来の高周波加熱装置を示す構成図であ
る。FIG. 11 is a configuration diagram showing a conventional high-frequency heating device.
１０，２１ 電熱線 １１，２０ セラミックスリング １２，２２，２５，２８ 被加熱物 １３，２３，２６，３０ 加熱コイル １４，２４，２７，２９ 断熱材 １５ 高周波電源 １６，１７ 出力ケーブル 10,21 heating wire 11,20 Ceramic ring 12, 22, 25, 28 Heated object 13,23,26,30 heating coil 14, 24, 27, 29 Thermal insulation 15 High frequency power supply 16,17 output cable
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｈ０５Ｂ 6/36 Ｈ０５Ｂ 6/36 Ｚ (58)調査した分野(Int.Cl.7，ＤＢ名) C21D 1/02 - 1/84 H05B 6/00 - 6/10 H05B 6/14 - 6/44 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI H05B 6/36 H05B 6/36 Z (58) Fields investigated (Int.Cl. 7 , DB name) C21D 1/02-1 / 84 H05B 6/00-6/10 H05B 6/14-6/44
Claims (2)
付けられたＮｉ−Ｃｒ−Ｆｅ系合金製の電熱線、複数の
セラミックリングが数珠状に取り付けられたＦｅ−Ｃｒ
−Ａｌ系合金製の電熱線または複数のセラミックリング
が数珠状に取り付けられたＦｅ−Ｃｒ−Ｃｏ−Ａｌ系合
金製の電熱線を被加熱物である鋼管の外周に巻回して加
熱コイルを形成し、前記加熱コイルの外側を断熱材で覆
い、前記加熱コイルに高周波電流を流して、前記鋼管に
生じる誘導電流による発熱および前記加熱コイルを流れ
る電流による前記加熱コイルの発熱からの輻射熱によっ
て前記鋼管を昇温させることを特徴とする高周波加熱方
法。1. A plurality of ceramic rings beaded the attached Ni-Cr-Fe based alloy heating wire, a plurality of
Fe-Cr with ceramic rings attached in a beaded shape
-Al-based alloy heating wire or multiple ceramic rings
To form a heating coil by winding a heating wire made of Fe-Cr-Co-Al-based alloy attached in a beaded shape on the outer circumference of a steel pipe that is an object to be heated, and covering the outside of the heating coil with a heat insulating material, A high-frequency heating method, wherein a high-frequency current is passed through the heating coil, and the temperature of the steel pipe is raised by radiant heat generated by heat generated by an induction current generated in the steel pipe and heat generated by the heating coil by a current flowing through the heating coil.
付けられたＮｉ−Ｃｒ−Ｆｅ系合金製の電熱線、複数の
セラミックリングが数珠状に取り付けられたＦｅ−Ｃｒ
−Ａｌ系合金製の電熱線または複数のセラミックリング
が数珠状に取り付けられたＦｅ−Ｃｒ−Ｃｏ−Ａｌ系合
金製の電熱線を被加熱物である鋼板の表面上でドーナツ
状に巻いて加熱コイルを形成し、前記加熱コイルの外側
を断熱材で覆い、前記加熱コイルに高周波電流を流し
て、前記鋼板に生じる誘導電流による発熱および前記加
熱コイルを流れる電流による前記加熱コイルの発熱から
の輻射熱によって前記鋼板を昇温させることを特徴とす
る高周波加熱方法。2. A plurality of ceramic rings beaded the attached Ni-Cr-Fe based alloy heating wire, a plurality of
Fe-Cr with ceramic rings attached in a beaded shape
-Al-based alloy heating wire or multiple ceramic rings
Are wound in a donut shape on the surface of a steel plate, which is an object to be heated, to form a heating coil, and a heating coil made of an Fe-Cr-Co-Al-based alloy attached in a beaded shape is formed on the outside of the heating coil. > Is covered with a heat insulating material, a high-frequency current is passed through the heating coil, and the temperature of the steel plate is raised by radiant heat from heat generated by the induced current generated in the steel plate and heat generated by the heating coil due to the current flowing through the heating coil. Characteristic high-frequency heating method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34686899A JP3510167B2 (en) | 1999-12-06 | 1999-12-06 | High frequency heating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34686899A JP3510167B2 (en) | 1999-12-06 | 1999-12-06 | High frequency heating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001164315A JP2001164315A (en) | 2001-06-19 |
| JP3510167B2 true JP3510167B2 (en) | 2004-03-22 |
Family
ID=18386365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34686899A Expired - Lifetime JP3510167B2 (en) | 1999-12-06 | 1999-12-06 | High frequency heating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3510167B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013229178A (en) * | 2012-04-25 | 2013-11-07 | Netsusan Heat Kk | Flexible surface-like heater, and metal member heating method using the same |
| KR101915972B1 (en) * | 2017-04-20 | 2018-11-07 | 강신복 | Energy saving heat treatment furnace |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4731302B2 (en) * | 2005-12-05 | 2011-07-20 | 日立アプライアンス株式会社 | Induction heating device |
| JP6329846B2 (en) * | 2014-08-12 | 2018-05-23 | 三菱日立パワーシステムズ株式会社 | Pipe heat treatment method and apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2681589B2 (en) * | 1992-12-28 | 1997-11-26 | 日揮株式会社 | Heat treatment method for welded pipe joints |
| JPH11102781A (en) * | 1997-09-29 | 1999-04-13 | Nippon Thermal Engineering Kk | High-frequency forced cooling composite conductor and electromagnetic induction heating coil |
-
1999
- 1999-12-06 JP JP34686899A patent/JP3510167B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013229178A (en) * | 2012-04-25 | 2013-11-07 | Netsusan Heat Kk | Flexible surface-like heater, and metal member heating method using the same |
| KR101915972B1 (en) * | 2017-04-20 | 2018-11-07 | 강신복 | Energy saving heat treatment furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001164315A (en) | 2001-06-19 |
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