JPS62149189U

JPS62149189U -

Info

Publication number: JPS62149189U
Application number: JP3598186U
Authority: JP
Priority date: 1986-03-12
Filing date: 1986-03-12
Publication date: 1987-09-21
Anticipated expiration: 2001-03-12
Also published as: JPH0514471Y2

Description

[Brief explanation of the drawing]

第１図と第３図は本考案の第１実施例と第２実
施例に係る誘導子の正面説明図、第２図は第１図
示の誘導子の斜視図、第４図と第５図は第１実施
例に係る誘導子と従来の誘導子の磁束分布図、第
６図Ａ、第６図Ｂと第７図は第１実施例、第２実
施例と従来の誘導子、及び誘導子の各導体を流れ
る電流密度分布と、電縫管に流れる誘起電流密度
の分布を示す図、第８図Ａ、第９図Ａ、第１０図
Ａはそれぞれ本考案の第１実施例と第２実施例と
従来例の誘導子により加熱した場合の管の周方向
の温度分布例を示す図、第８図Ｂ、第９図Ｂ、第
１０図Ｂは、それぞれ第８図Ａ、第９図Ａ、第１
０図Ａに対応する管の断面における温度分布例を
等温線で示す図、第１１図Ａ、第１２図は従来の
誘導子による熱処理装置の正面図と平面図、第１
１図Ｂは電縫管の断面図、第１３図は誘導子に流
れる電流と電縫管に流れる誘起電流を矢印で表示
した熱処理装置の主要部の斜視図、第１４図は誘
導子により加熱される管の溶接部近傍の被熱処理
部を示す説明図である。１……電縫管、７……誘導子、８……溶接部、
９……鉄心、１０……導体、１２……被熱処理部
、１１……切欠き部、１４……凹部。 1 and 3 are front explanatory views of inductors according to the first and second embodiments of the present invention, FIG. 2 is a perspective view of the inductor shown in FIG. 1, and FIGS. 4 and 5. 6A, 6B, and 7 are magnetic flux distribution diagrams of the inductor according to the first embodiment and the conventional inductor, and FIG. 6A, FIG. 6B, and FIG. Figures 8A, 9A, and 10A are diagrams showing the current density distribution flowing through each conductor of the wire and the distribution of the induced current density flowing through the ERW tube, respectively. Figures 8B, 9B, and 10B are diagrams showing examples of temperature distribution in the circumferential direction of the tube when heated by the inductor of the second embodiment and the conventional example, respectively. Figure A, 1st
A diagram showing an example of temperature distribution in the cross section of the tube corresponding to Figure 0A using isothermal lines; Figures 11A and 12 are a front view and a plan view of a conventional heat treatment apparatus using an inductor;
Figure 1B is a cross-sectional view of the ERW tube, Figure 13 is a perspective view of the main parts of the heat treatment equipment with arrows indicating the current flowing in the inductor and the induced current flowing in the ERW tube, and Figure 14 is the heating by the inductor. FIG. 2 is an explanatory diagram showing a heat-treated portion near a welded portion of a pipe. 1... ERW pipe, 7... Inductor, 8... Welded part,
9... Iron core, 10... Conductor, 12... Heat treated portion, 11... Notch, 14... Recessed portion.

Claims

[Scope of utility model registration request]

In an inductor for a device that locally heat-treats the vicinity of a welded part of a running electric resistance welded pipe by induction heating, the inductor consists of a current-carrying conductor and an iron core surrounding the conductor. 1. An inductor for an electric resistance welded tube local heat treatment device, characterized in that a notch is formed along the traveling direction of the electric resistance welded tube in a portion of an iron core in contact with a conductor.