JPS6117353B2 - - Google Patents
Info
- Publication number
- JPS6117353B2 JPS6117353B2 JP479680A JP479680A JPS6117353B2 JP S6117353 B2 JPS6117353 B2 JP S6117353B2 JP 479680 A JP479680 A JP 479680A JP 479680 A JP479680 A JP 479680A JP S6117353 B2 JPS6117353 B2 JP S6117353B2
- Authority
- JP
- Japan
- Prior art keywords
- sheathed heater
- terminal
- glass
- metal pipe
- molded body
- 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
Links
- 239000011521 glass Substances 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 10
- 229910052573 porcelain Inorganic materials 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000565 sealant Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000005394 sealing glass Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- -1 steatite Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Description
【発明の詳細な説明】
本発明はガラス封口が施されたシーズヒータに
関し、外部衝撃によるガラスの割れを防止し、絶
縁特性の優れたシーズヒータを提供しようとする
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheathed heater with a glass seal, and an object thereof is to prevent the glass from breaking due to external impact and to provide a sheathed heater with excellent insulation properties.
従来、この種のシーズヒータは第１図に示すよ
うな構成であつた。すなわち、第１図において、
１は金属パイプであり、両端に端子棒２を備えた
電熱線３が挿入されている。４は金属パイプ１に
充填されたマグネシア等の絶縁粉末、５は金属パ
イプ１の両端部を封口するガラスである。 Conventionally, this type of sheathed heater has had a configuration as shown in FIG. That is, in Figure 1,
Reference numeral 1 designates a metal pipe into which a heating wire 3 having terminal rods 2 at both ends is inserted. 4 is an insulating powder such as magnesia filled in the metal pipe 1, and 5 is glass for sealing both ends of the metal pipe 1.
従来のシーズヒータにおいてガラス５はPbO−
B2O3系低融点ガラス等が使用されているが、こ
の種のガラスによる封口は非常に高い気密性を有
し、かつ電気特性に優れている。しかし、機械的
強度が弱く、端子棒にわずか２〜３Kgの荷重が加
わるだけでガラスが割れてしまう。このため、こ
の封口ガラスの割れたシーズヒータを多湿雰囲気
中に放置すると絶縁粉末が吸湿し、電気絶縁特性
が著しく低下して使用に耐えなくなる。このよう
な欠点があるにもかかわなず、ガラスで封口して
いるのが実情であつた。 In the conventional sheathed heater, the glass 5 is PbO−
B 2 O 3 type low-melting glass is used, and sealing with this type of glass has extremely high airtightness and excellent electrical properties. However, the mechanical strength is weak, and the glass will break if a load of only 2 to 3 kg is applied to the terminal bar. For this reason, if a sheathed heater with a broken sealing glass is left in a humid atmosphere, the insulating powder will absorb moisture, and its electrical insulation properties will drop significantly, making it unusable. Despite these drawbacks, the reality was that they were sealed with glass.
本発明は上記従来のシーズヒータの欠点を解消
するもので、以下本発明の実施例について添付図
面を参照して説明する。 The present invention solves the above-mentioned drawbacks of the conventional sheathed heater, and embodiments of the present invention will be described below with reference to the accompanying drawings.
第２図において、６はアルミナ、ステアタイ
ト、シリカ等からなる有底筒状の磁器成型体であ
り、底部には棒状のリード端子７が貫通状態で支
持されている。８はリード端子７の内側端に接続
された弾性を有する導電性コイルである。この磁
器成型体６を従来と同様のシーズヒータの金属パ
イプ１の端部を覆うように取付け、導電性コイル
８の他端を端子棒２に接続してシーズヒータが完
成される。なお、導電性コイル８と端子棒２はス
ポツト溶接にて一体化したり、端子棒２にネジ加
工を施し導電性コイル８を螺着させたりすればよ
い。また、磁器成型体６と金属パイプ１は特別な
考慮を配する必要がなく、導電性コイル８の張力
で充分である。また、特に強固な接着を必要とす
る場合には第４図に示すように耐熱性接着剤９を
使用すればよい。ただし、使用する耐熱性接着剤
９の硬化温度はガラス封口剤５の硬化温度以下で
あることが必要である。 In FIG. 2, reference numeral 6 denotes a bottomed cylindrical porcelain molded body made of alumina, steatite, silica, etc., and a rod-shaped lead terminal 7 is supported through the bottom thereof. Reference numeral 8 denotes an elastic conductive coil connected to the inner end of the lead terminal 7. This porcelain molded body 6 is attached to cover the end of the metal pipe 1 of a conventional sheathed heater, and the other end of the conductive coil 8 is connected to the terminal bar 2 to complete the sheathed heater. The conductive coil 8 and the terminal bar 2 may be integrated by spot welding, or the terminal bar 2 may be threaded and the conductive coil 8 may be screwed onto the terminal bar 2. Further, there is no need to take any special consideration to the porcelain molded body 6 and the metal pipe 1, and the tension of the conductive coil 8 is sufficient. Furthermore, if particularly strong adhesion is required, a heat-resistant adhesive 9 may be used as shown in FIG. However, the curing temperature of the heat-resistant adhesive 9 used needs to be lower than the curing temperature of the glass sealant 5.
上記構成において、リード端子７に荷重を加
え、ガラス封口剤５を調べたところ20Kgの荷重ま
では割れが全く見られなかつた。これはリード端
子７に加わる荷重が導電性コイル８または金属パ
イプ１に分散することにより端子棒２に直接荷重
がかからないためである。 In the above configuration, when a load was applied to the lead terminal 7 and the glass sealant 5 was examined, no cracks were observed up to a load of 20 kg. This is because the load applied to the lead terminal 7 is distributed to the conductive coil 8 or the metal pipe 1, so that no load is applied directly to the terminal bar 2.
以上の説明から明らかなように、本発明のシー
ズヒータは金属パイプの端部を覆う有底筒状の磁
器成型体にリード端子を支持し、このリード端子
と端子棒とを弾力性を有する導電性コイルで接続
したので外部衝撃が端子棒に直接加わることはな
く、ガラス封口剤の割れが生ぜず、電気絶縁特性
の良好なシーズヒータが得られる。 As is clear from the above description, the sheathed heater of the present invention supports lead terminals on a bottomed cylindrical porcelain molded body that covers the end of a metal pipe, and connects the lead terminals and terminal rods to conductive conductors having elasticity. Since the terminal rod is connected with a magnetic coil, no external impact is applied directly to the terminal rod, and the glass sealant does not crack, making it possible to obtain a sheathed heater with good electrical insulation properties.
第１図は従来のシーズヒータの一部欠截断面
図、第２図は本発明の一実施例を示すシーズヒー
タの要部斜視図、第３図は同シーズヒータの一部
欠截断面図、第４図は本発明の他の実施例におけ
るシーズヒータの要部正面図である。
１……金属パイプ、２……端子棒、３……電熱
線、４……絶縁粉末、５……ガラス、６……磁器
成型体、７……リード端子、８……導電性コイ
ル。
FIG. 1 is a partially cutaway sectional view of a conventional sheathed heater, FIG. 2 is a perspective view of essential parts of a sheathed heater showing an embodiment of the present invention, and FIG. 3 is a partially cutaway sectional view of the same sheathed heater. , FIG. 4 is a front view of essential parts of a sheathed heater in another embodiment of the present invention. 1... Metal pipe, 2... Terminal bar, 3... Heating wire, 4... Insulating powder, 5... Glass, 6... Porcelain molded body, 7... Lead terminal, 8... Conductive coil.
Claims (1)
挿入し、絶縁粉末を充填するとともに両端部をガ
ラス封口してなるシーズヒータにおいて、金属パ
イプの端部を覆う有底筒状の磁器成型体と、この
磁器成型体の底部を貫通するリード端子と、この
リード端子と前記端子棒を接続する弾性を有する
導電性コイルを備えたことを特徴とするシーズヒ
ータ。1 In a sheathed heater in which a heating wire with terminal rods at both ends is inserted into a metal pipe, filled with insulating powder, and both ends sealed with glass, a bottomed cylindrical porcelain molded body that covers the end of the metal pipe A sheathed heater comprising: a lead terminal passing through the bottom of the porcelain molded body; and an elastic conductive coil connecting the lead terminal and the terminal bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP479680A JPS56102091A (en) | 1980-01-19 | 1980-01-19 | Sheathed heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP479680A JPS56102091A (en) | 1980-01-19 | 1980-01-19 | Sheathed heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56102091A JPS56102091A (en) | 1981-08-15 |
| JPS6117353B2 true JPS6117353B2 (en) | 1986-05-07 |
Family
ID=11593729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP479680A Granted JPS56102091A (en) | 1980-01-19 | 1980-01-19 | Sheathed heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56102091A (en) |
-
1980
- 1980-01-19 JP JP479680A patent/JPS56102091A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56102091A (en) | 1981-08-15 |
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