JPS6367760B2 - - Google Patents
Info
- Publication number
- JPS6367760B2 JPS6367760B2 JP11182681A JP11182681A JPS6367760B2 JP S6367760 B2 JPS6367760 B2 JP S6367760B2 JP 11182681 A JP11182681 A JP 11182681A JP 11182681 A JP11182681 A JP 11182681A JP S6367760 B2 JPS6367760 B2 JP S6367760B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- sheathed heater
- resin film
- sealed
- heating wire
- 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
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- -1 polytrifluoroethylene Polymers 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 6
- 239000003566 sealing material Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- ZQXCQTAELHSNAT-UHFFFAOYSA-N 1-chloro-3-nitro-5-(trifluoromethyl)benzene Chemical compound [O-][N+](=O)C1=CC(Cl)=CC(C(F)(F)F)=C1 ZQXCQTAELHSNAT-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Description
【発明の詳細な説明】
本発明はシーズヒータに係り、特にパイプの端
部開口の封口に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheathed heater, and particularly to sealing an opening at the end of a pipe.
従来、シーズヒータのパイプ端部開口をガラス
により完全封口し、パイプ内の電気絶縁粉末の吸
湿を遮断し、高絶縁抵抗値を維持していた。とこ
ろが、このようにガラスによつて封口したシーズ
ヒータは衝撃が加えられるとガラスが割れてしま
い、吸湿遮断の効果が期待できなくなるので取扱
いには注意を要するものであつた。また、このシ
ーズヒータを高温度で使用すると、パイプ内の酸
素が電熱線と反応して消費され、パイプ内圧力が
非常に低下し、このため電熱線の金属成分が遊離
し、寿命が短かくなつたり、耐電圧が劣化したり
する欠点があつた。 Conventionally, the pipe end opening of a sheathed heater was completely sealed with glass to block moisture absorption of the electrical insulating powder inside the pipe and maintain a high insulation resistance value. However, such a sheathed heater sealed with glass must be handled with care because the glass breaks when an impact is applied, and the effect of blocking moisture absorption can no longer be expected. In addition, when this sheathed heater is used at high temperatures, the oxygen in the pipe reacts with the heating wire and is consumed, causing the pressure inside the pipe to drop significantly, which causes the metal components of the heating wire to be liberated, shortening its life. There were drawbacks such as aging and deterioration of withstand voltage.
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、以下に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１，２図において、１は金属製のパイプ、２
はパイプ１に挿入されたコイル状の電熱線、３は
電熱線２の両端に接続された端子棒、４はパイプ
１内に充填されたマグネシア等の電気絶縁粉末で
ある。５はシリコンゴム製の絶縁性の封口材、６
は封口材５とパイプ１の間および封口材５と端子
棒３の間を封止する高真空グリース、７はパイプ
１の端部開口を封口するポリ三フツ化エチレン樹
脂フイルムである。第１図に示す実施例において
はパイプ１の端部開口を封口材５で封口し、つい
で高真空グリース６を埋め、さらにポリ三フツ化
エチレン樹脂フイルム７で封口してある。また、
第２図に示す実施例においてはパイプ１の端部開
口をポリ三フツ化エチレン樹脂フイルム７で封口
し、ついで高真空グリース６を埋め、さらに封口
材５で封口してある。 In Figures 1 and 2, 1 is a metal pipe, 2
3 is a coiled heating wire inserted into the pipe 1; 3 is a terminal bar connected to both ends of the heating wire 2; and 4 is an electrically insulating powder such as magnesia filled in the pipe 1. 5 is an insulating sealing material made of silicone rubber, 6
7 is a high vacuum grease that seals between the sealing material 5 and the pipe 1 and between the sealing material 5 and the terminal bar 3; and 7 is a polytrifluoroethylene resin film that seals the end opening of the pipe 1. In the embodiment shown in FIG. 1, the end opening of the pipe 1 is sealed with a sealing material 5, then filled with high vacuum grease 6, and further sealed with a polytrifluoroethylene resin film 7. Also,
In the embodiment shown in FIG. 2, the end opening of the pipe 1 is sealed with a polytrifluoroethylene resin film 7, then filled with high vacuum grease 6, and further sealed with a sealing material 5.
上記構成において、ポリ三フツ化エチレン樹脂
フイルム７は湿気を遮断するが、酸素や窒素等の
みを透過する性質を有し、従つて電気絶縁粉末４
が外部の湿気を吸湿することがなく、絶縁抵抗の
劣化を防止することができる。また、電熱線２と
パイプ１内の気体が反応し、パイプ１内の気体が
消費されても、外部からポリ三フツ化エチレン樹
脂フイルム７を通して気体が供給されるのでパイ
プ１内が減圧状態とならず、電熱線２の金属成分
の遊離を防止することができる。従つて、高温度
にて使用されても寿命が長く、かつ高絶縁抵抗が
維持される。 In the above configuration, the polytrifluoroethylene resin film 7 blocks moisture but has the property of transmitting only oxygen, nitrogen, etc., and therefore the electrical insulating powder 4
does not absorb external moisture, and can prevent deterioration of insulation resistance. In addition, even if the heating wire 2 reacts with the gas in the pipe 1 and the gas in the pipe 1 is consumed, the gas is supplied from the outside through the polytrifluoroethylene resin film 7, so the pressure inside the pipe 1 remains reduced. Therefore, the metal components of the heating wire 2 can be prevented from being released. Therefore, even when used at high temperatures, it has a long life and maintains high insulation resistance.
以上の説明から明らかなように、本発明のシー
ズヒータはパイプの端部開口をポリ三フツ化エチ
レン樹脂フイルムを用いて封口したので、電気絶
縁粉末の吸湿を防止するとともに、パイプ内の減
圧を防止し、長寿命で絶縁抵抗が高く、その工業
的価値は大なるものである。 As is clear from the above description, in the sheathed heater of the present invention, the end opening of the pipe is sealed using a polytrifluoroethylene resin film, which prevents the electrical insulating powder from absorbing moisture and reduces the pressure inside the pipe. It has a long life, high insulation resistance, and has great industrial value.
第１図は本発明の一実施例を示すシーズヒータ
の要部断面図、第２図は本発明の他の実施例を示
すシーズヒータの要部断面図である。
１……パイプ、７……ポリ三フツ化エチレン樹
脂フイルム。
FIG. 1 is a sectional view of a main part of a sheathed heater showing one embodiment of the present invention, and FIG. 2 is a sectional view of a main part of a sheathed heater showing another embodiment of the invention. 1...Pipe, 7...Polyethylene trifluoride resin film.
Claims (1)
脂フイルムにより封口してなるシーズヒータ。1. A sheathed heater formed by sealing the end opening of a pipe with a polytrifluoroethylene resin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56111826A JPS5812280A (en) | 1981-07-16 | 1981-07-16 | Sea heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56111826A JPS5812280A (en) | 1981-07-16 | 1981-07-16 | Sea heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5812280A JPS5812280A (en) | 1983-01-24 |
| JPS6367760B2 true JPS6367760B2 (en) | 1988-12-27 |
Family
ID=14571127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56111826A Granted JPS5812280A (en) | 1981-07-16 | 1981-07-16 | Sea heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5812280A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63152190U (en) * | 1987-03-26 | 1988-10-06 | ||
| JPH0759217B2 (en) * | 1989-08-04 | 1995-06-28 | 三菱電機ホーム機器株式会社 | Electric rice cooker |
| DE4338807C1 (en) * | 1993-11-12 | 1995-01-26 | Heraeus Quarzglas | Moulding having a high content of silicon dioxide, and process for the production of such mouldings |
-
1981
- 1981-07-16 JP JP56111826A patent/JPS5812280A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5812280A (en) | 1983-01-24 |
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