JPS5947873B2 - Sea heater - Google Patents
Sea heaterInfo
- Publication number
- JPS5947873B2 JPS5947873B2 JP12155976A JP12155976A JPS5947873B2 JP S5947873 B2 JPS5947873 B2 JP S5947873B2 JP 12155976 A JP12155976 A JP 12155976A JP 12155976 A JP12155976 A JP 12155976A JP S5947873 B2 JPS5947873 B2 JP S5947873B2
- Authority
- JP
- Japan
- Prior art keywords
- heater
- sheathed heater
- metal pipe
- siloxane
- silicone resin
- 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
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 18
- 239000000395 magnesium oxide Substances 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 8
- 229920002050 silicone resin Polymers 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- -1 siloxane chain Chemical group 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000005871 repellent Substances 0.000 description 4
- 229910018557 Si O Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 125000000732 arylene group Chemical group 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Landscapes
- Resistance Heating (AREA)
- Silicon Polymers (AREA)
Description
【発明の詳細な説明】
本発明は吸湿によるシーズヒータの絶縁抵抗特性の改良
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improving the insulation resistance characteristics of a sheathed heater due to moisture absorption.
従来のシーズヒータは、一般に第１図に示すように、金
属パイプ１と、端子棒２を溶接したコイル状ヒータ３と
の間に電気絶縁材料４を充填しているっこの際電気絶縁
材料４としてはマグネシア粉末が最も広く使用されるが
、マグネシア粉末は吸湿性があるため、室内雰囲気で容
易に吸湿し絶縁抵抗を劣化させるという欠点があつた。In a conventional sheathed heater, as shown in FIG. 1, an electrically insulating material 4 is generally filled between a metal pipe 1 and a coiled heater 3 to which a terminal bar 2 is welded. Magnesia powder is most widely used as a material, but since magnesia powder is hygroscopic, it has the disadvantage that it easily absorbs moisture in indoor atmosphere and deteriorates insulation resistance.
そこで、このマグネシア粉末にシリコン樹脂を混合した
後加熱し、マグネシア粉末表面にシリコン樹脂被膜を形
成させることにより、充填材表面が撥水性を持ち、外部
の湿気を容易に吸湿しなくなり、絶縁性能の劣化を防止
する方法が提案されている。しかし、この方法では、シ
リコン樹脂の耐熱温度が約３５０℃と低いため、高温使
用後においてはシリコン樹脂の分解により撥水性が低下
し、室内雰囲気中で充填材が吸湿をおこし、絶縁特性の
劣化をおこしやすいという欠点があつた。本発明は、か
かる欠点を克服するもので、すなわちシーズヒータの高
温使用によつても絶縁特性が劣化しないように、電気絶
縁材料に用いるマグネシア粉末など自体の表面に高温加
熱後も劣化しない撥水性を附与し、かつ長期間の使用に
よつても変質しないシーズヒータを提供するものである
。Therefore, by mixing silicone resin with this magnesia powder and heating it to form a silicone resin film on the surface of the magnesia powder, the surface of the filler becomes water repellent and does not easily absorb moisture from the outside, improving insulation performance. Methods have been proposed to prevent deterioration. However, with this method, the heat resistance of silicone resin is as low as approximately 350°C, so after high-temperature use, the silicone resin decomposes and water repellency decreases, and the filler absorbs moisture in the indoor atmosphere, causing deterioration of insulation properties. The disadvantage is that it is easy to cause The present invention overcomes these drawbacks, namely, in order to prevent the insulation properties from deteriorating even when the sheathed heater is used at high temperatures, the surface of magnesia powder used as an electrical insulating material has a water-repellent property that does not deteriorate even after high-temperature heating. The present invention provides a sheathed heater which provides a sheathed heater with the following properties and which does not deteriorate even after long-term use.
以下本発明の一実施例を第２図に基ずいて説明すると、
第２図において５はシーズヒータの外筐体を構成する金
属パイプで、その中央にはヒータ６を有し、かつこのヒ
ータ６の両端にはそれぞれ金属パイプ５より突出する端
子棒Ｔを設けている。８は金属パイプ５内に充填された
マグネシア粉末に、ポリシルフエニレンシロキサンなど
のポリシルアリーレンシロキサン耐熱。An embodiment of the present invention will be described below based on FIG. 2.
In FIG. 2, reference numeral 5 denotes a metal pipe constituting the outer casing of the sheathed heater, which has a heater 6 in its center, and terminal rods T protruding from the metal pipe 5 at both ends of the heater 6. There is. 8 is a heat-resistant polysylarylene siloxane such as polysylphenylene siloxane in the magnesia powder filled in the metal pipe 5.
撥水性樹脂を混合混和させた電気絶縁材料である。上記
の如く作られたシーズヒータに通電する事により混合附
与されたポリシルアリーレンシロキサンは加熱され粘度
が低下しマグネシア表面に被着し、ポリシルアリーレン
シロキサン層を形成する事により、充填材は撥水性を発
揮する。It is an electrical insulating material mixed with water-repellent resin. By applying electricity to the sheathed heater made as described above, the mixed and added polysylarylene siloxane is heated, its viscosity decreases, and it adheres to the surface of magnesia, forming a polysylarylene siloxane layer. Demonstrates water repellency.
かかるポリシルアリーレンシロキサンは、下記の一般式
で表わされ、ポリシルフエニレンシロキサンで代表され
るように、従来のシリコン樹脂中のＳｉ−Ｏ骨格をＳｉ
−Ａｒ−Ｓｉ−Ｏ骨格（（Ａｒはアリーレン基）レＣ変
換したものである。Such polysylarylene siloxane is represented by the general formula below, and as represented by polysylphenylene siloxane, the Si-O skeleton in the conventional silicone resin is replaced with Si.
-Ar-Si-O skeleton ((Ar is an arylene group) is converted to C.
−Ｈｉ−゜Ｓ■ｉ−Ｏ− ただしＲは有機基を示す。-Hi-゜S■i-O- However, R represents an organic group.
このようにシロキサン連鎖のなかにシルアリーレン基を
組み込んだ樹脂は、１００℃以上も熱的に安定となるた
め、シリコン樹脂よりも高温に耐えられる撓水性樹脂で
ある。A resin in which a silarylene group is incorporated into a siloxane chain in this way is thermally stable at temperatures of 100° C. or higher, and is therefore a water-repellent resin that can withstand higher temperatures than silicone resins.
上記の樹脂を被着させたマグネシアを絶縁材料として用
いたシーズヒータで、シリコン樹脂を被着させたものよ
り１００℃以上の耐熱．撓水性が得られた。以上のよう
に、本発明シーズヒータは、金属パイプ内にヒータおよ
び端子部を絶縁保持する充填材料の粒子表面にポリシル
フエニレンシロキサンなどのポリシルアリーレンシロキ
サン層を施しているため、充填材料は撓水性を持ち、か
つ高温に加熱された後もその撓水性を失わない。This is a sheathed heater that uses magnesia coated with the above resin as an insulating material, and has a heat resistance of 100°C or more compared to those coated with silicone resin. Water repellency was obtained. As described above, in the sheathed heater of the present invention, a layer of polysylarylene siloxane such as polysylphenylenesiloxane is applied to the surface of the particles of the filling material that insulates and holds the heater and the terminal portion within the metal pipe. It has water repellency and does not lose its water repellency even after being heated to high temperatures.
さらに、それらの樹脂が分解しても電気絶縁体のシリカ
となり、電気絶縁特性を保持させるなどの特長を有し、
その工業的価値は大である。Furthermore, even when these resins decompose, they become silica, an electrical insulator, and retain their electrical insulation properties.
Its industrial value is great.
第１図は従来のシーズヒータの断面図、第２図は本発明
のーー実施例を示すシーズヒータの断面図である．５・
・・・・・金属パイプ、６・・・・・化−タ、Ｔ・・・
・・・端子棒、８・・・・・・電気絶縁材料。FIG. 1 is a sectional view of a conventional sheathed heater, and FIG. 2 is a sectional view of a sheathed heater showing an embodiment of the present invention. 5.
...Metal pipe, 6...Converter, T...
...Terminal bar, 8...Electrical insulating material.
Claims (1)
間にマグネシア粉末などの電気絶縁材料を充填してなる
シーズヒータにおいて、前記充填材に、シリコン樹脂中
のシロキサン連鎖のなかにシルアリーレン基を組み込ん
だ重合体を混合附与させ、前記金属パイプ内に充填する
ことを特徴とするシーズヒータ。1. In a sheathed heater in which an electrical insulating material such as magnesia powder is filled between a coiled heater equipped with a terminal bar and a metal pipe, the filling material contains a silarylene group in the siloxane chain in the silicone resin. A sheathed heater characterized in that the incorporated polymer is mixed and applied and filled into the metal pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12155976A JPS5947873B2 (en) | 1976-10-08 | 1976-10-08 | Sea heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12155976A JPS5947873B2 (en) | 1976-10-08 | 1976-10-08 | Sea heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5345742A JPS5345742A (en) | 1978-04-24 |
| JPS5947873B2 true JPS5947873B2 (en) | 1984-11-21 |
Family
ID=14814225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12155976A Expired JPS5947873B2 (en) | 1976-10-08 | 1976-10-08 | Sea heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5947873B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58156448U (en) * | 1982-04-15 | 1983-10-19 | 株式会社岡村製作所 | Rotatable telescoping device for chairs, etc. |
-
1976
- 1976-10-08 JP JP12155976A patent/JPS5947873B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5345742A (en) | 1978-04-24 |
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