JPS5974687U

JPS5974687U - Sea heater

Info

Publication number: JPS5974687U
Application number: JP16962182U
Authority: JP
Inventors: 浩一日比野; 市村　伸男
Original assignee: 三菱電機株式会社
Priority date: 1982-11-09
Filing date: 1982-11-09
Publication date: 1984-05-21

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

[Brief explanation of the drawing]

第１図は従来のシーズヒータの端部を示す縦断面図、第
２図はこの考案の一実施例のシーズヒータの途中工程を
示す縦断面図、第３図はその完成した状態を示す縦断、
面図、第４図はその混合体層の拡大断面図、第５図はガ
ラス体層にクラックが入った状態を示す状態図、第６図
は他の実施例のシーズヒータのガラス体層にクラックが
入った状態を示す状態図である。図において、２は管、４は発熱線、５は口出線、７はガ
ラス体層、１４はマグネシア粉末、１８は混合体層、１
９はガラス体層である。各図中、同一符号は同一または
相当部分を示すものである。Fig. 1 is a longitudinal cross-sectional view showing the end of a conventional sheathed heater, Fig. 2 is a longitudinal cross-sectional view showing an intermediate process of the sheathed heater according to an embodiment of this invention, and Fig. 3 is a longitudinal cross-sectional view showing the completed state. ,
4 is an enlarged sectional view of the mixture layer, FIG. 5 is a state diagram showing a state in which a crack has appeared in the glass layer, and FIG. 6 is a diagram showing the glass layer of a sheathed heater of another example. FIG. 3 is a state diagram showing a cracked state. In the figure, 2 is a tube, 4 is a heating wire, 5 is an exit wire, 7 is a glass body layer, 14 is a magnesia powder, 18 is a mixture layer, 1
9 is a glass body layer. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

(1) A tube with an opening at one end, a heating wire provided in this tube, a sun wire connected to this heating wire and extending outside from the opening at one end of the tube, and a an electrically insulating powder filled between the heating wire and the heating wire; a glass layer that is melted and fixed between the tube and the Hiji wire in the tube to close an opening at one end of the tube; It is characterized by comprising a mixture layer in which a powder having rigidity and electrical insulation properties is mixed in a modified glass layer that is melted and fixed between the above-mentioned Hiji wire in the pipe and closes the opening at one end of the pipe. A sheathed heater.

(2) The sheathed heater according to claim 1, wherein the powder is made of magnesia.