JPS5883665U

JPS5883665U - High temperature glow plug

Info

Publication number: JPS5883665U
Application number: JP17987381U
Authority: JP
Inventors: 恒夫伊藤
Original assignee: 日本特殊陶業株式会社
Priority date: 1981-12-01
Filing date: 1981-12-01
Publication date: 1983-06-06

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図は本考案にかかる高温用グロープラグの断面図で
あり、第２図は発熱体アッセンブリの断面図である。図中１・・・取付金具、２・・・中心端子、３・・・金
属チューブ、４・・・溶射層、５・・・銀ろう付け、６
・・・発熱体、８，８・・・端子、９・・・先端キャッ
プ、１０・・・一つ穴碍管、１１・・・二つ穴碍管、１
２．１３・・・粉末、１４・・・ガラスシール。FIG. 1 is a sectional view of a high temperature glow plug according to the present invention, and FIG. 2 is a sectional view of a heating element assembly. In the figure 1... Mounting bracket, 2... Center terminal, 3... Metal tube, 4... Thermal spray layer, 5... Silver brazing, 6
...Heating element, 8,8...Terminal, 9...Tip cap, 10...Single hole insulator tube, 11...Double hole insulator tube, 1
2.13...Powder, 14...Glass seal.

Claims

[Scope of Claim for Utility Model Registration] 1. A metal tube with a closed end is fitted onto the front end of a hollow mounting bracket with the front end protruding, the fitting portion of both is brazed, and the outside of the metal tube is The sides are made of chromium oxide (
Powders of oxidation-resistant metal oxides such as Cr2.03) and aluminum oxide (A1203) are thermally sprayed, and inside the metal tube there are wires made of high melting point metals mainly composed of tungsten (W), molybdenum (MO), etc. A heating element is provided in the metal tube, and a fixture made of a ceramic insulator such as silicon nitride (Si3N4) is installed in the gap between the heating elements in the metal tube to fix the position of the heating element in the metal tube. In the gap between the heating elements, Si3N4, AIN, and B are used to prevent oxidation of the heating element.
filled with powder such as N, one terminal of the heating element is electrically connected to a rod-shaped center terminal inserted into the axis of the mounting bracket, and the other terminal of the heating element is electrically connected to the metal tube, Furthermore, a glow plug for high temperature use is characterized in that the gap between the mounting bracket and the rod-shaped center terminal is filled with a powder of Si3N4, AIN, BN, etc. for oxidation prevention, and further sealed with a glass seal. 2. The ceramic insulator fixture includes a centering tip cap provided inside the closed end of the metal tube, and a cylindrical body for preventing contact between the linear heating element and the metal tube. A high-temperature glow plug as set forth in claim 1 of the utility model registration claim, characterized in that: