JPS6161031B2 - - Google Patents
Info
- Publication number
- JPS6161031B2 JPS6161031B2 JP54088140A JP8814079A JPS6161031B2 JP S6161031 B2 JPS6161031 B2 JP S6161031B2 JP 54088140 A JP54088140 A JP 54088140A JP 8814079 A JP8814079 A JP 8814079A JP S6161031 B2 JPS6161031 B2 JP S6161031B2
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- molded body
- ceramic fiber
- buried
- fiber molded
- 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
Landscapes
- Resistance Heating (AREA)
- Furnace Details (AREA)
Description
【発明の詳細な説明】
この発明は、セラミツクフアイバ成形体の一方
の側に電気抵抗発熱体を埋設した発熱体埋設ヒー
タに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heating element embedded heater in which an electrical resistance heating element is embedded in one side of a ceramic fiber molded body.
近時、電気炉などにおいて、セラミツクフアイ
バ成形体に電気抵抗発熱体を埋設してなる埋設ヒ
ータが発熱体兼炉内壁として使用されている。耐
熱性無機質繊維に少量のバインダを加えてブロツ
ク状に成形したいわゆるセラミツクフアイバ成形
体は、軽量であり断熱特性が優れているために炉
壁として好適なものであるが、しかしながら、セ
ラミツクフアイバ成形体に電気抵抗発熱体を埋設
して埋設ヒータとして使用する場合、セラミツク
フアイバ成形体の断熱特性が極めて良好であるた
めに、埋設された発熱体が必要以上に過熱され、
その発熱体の耐久性が損なわれる難点がある。 2. Description of the Related Art Recently, in electric furnaces and the like, embedded heaters in which an electric resistance heating element is embedded in a ceramic fiber molded body are used as the heating element and the inner wall of the furnace. Ceramic fiber molded products, which are made by adding a small amount of binder to heat-resistant inorganic fibers and molding them into a block shape, are suitable for furnace walls because they are lightweight and have excellent heat insulation properties. When an electric resistance heating element is buried in a ceramic fiber and used as a buried heater, the ceramic fiber molded body has extremely good insulation properties, so the buried heating element is overheated more than necessary.
There is a drawback that the durability of the heating element is impaired.
このため、この種の埋設ヒータを使用しようと
する場合においては、発熱体をセラミツクフアイ
バ成形体の表面にできるだけ近接させて、あるい
は、発熱体の一部が該成形体の表面から露出する
程度に接近させて埋設し、発熱体が極度に過熱さ
れるのを防いでいる。しかしながら、セラミツク
フアイバ成形体はそれ自体が軟弱であり、外力の
作用により容易に変形破損し易いものであるため
に、セラミツクフアイバ成形体の表面に近接させ
て電気抵抗発熱体を埋設して使用する場合、使用
時の発熱体の熱変形によりセラミツクフアイバ成
形体表面が損傷され発熱体が脱落し易い欠点があ
り、この種の埋設ヒータの利用範囲が制限されて
いた。 Therefore, when using this type of buried heater, the heating element should be placed as close as possible to the surface of the ceramic fiber molded body, or the heating element should be placed as close as possible to the surface of the molded body to the extent that part of the heating element is exposed from the surface of the molded body. They are buried close together to prevent the heating element from becoming extremely overheated. However, the ceramic fiber molded body itself is soft and easily deformed and damaged by the action of external force, so an electrical resistance heating element is buried close to the surface of the ceramic fiber molded body. In this case, the surface of the ceramic fiber molded body is damaged due to thermal deformation of the heating element during use, and the heating element tends to fall off, which limits the scope of use of this type of buried heater.
この発明は、電気抵抗発熱体をセラミツクフア
イバ成形体の一側に埋設してなる従来の埋設ヒー
タにおける上記欠点を解消し、埋設ヒータの用途
の制限を除去することを目的としてなされたもの
で、セラミツクフアイバ成形体の一側の溝内の耐
火材中に電気抵抗発熱体を埋設し、この電気抵抗
発熱体を係止片で保持する埋設ヒータに係る。 The present invention was made with the aim of eliminating the above-mentioned drawbacks of conventional buried heaters in which an electric resistance heating element is buried in one side of a ceramic fiber molded body, and to remove restrictions on the use of buried heaters. This invention relates to an embedded heater in which an electrical resistance heating element is embedded in a refractory material in a groove on one side of a ceramic fiber molded body, and the electrical resistance heating element is held by a locking piece.
本発明の実施例を説明する。 Examples of the present invention will be described.
セラミツクフアイバ成形体１の表面に発熱体を
収容する溝４を予め成形し、該溝４に、係止片
３，３…を有する発熱体２を、該係止片３，３、
…を成形体１を貫通させて挿入し、成形体の裏面
にて係止片３，３、…を折曲げ発熱体２を成形体
１に固定した後、該溝４に耐火材５を埋込むこと
により図に示す如き埋設ヒータとすることもでき
る。 A groove 4 for accommodating a heating element is formed in advance on the surface of the ceramic fiber molded body 1, and a heating element 2 having locking pieces 3, 3, . . . is placed in the groove 4.
... is inserted through the molded body 1, and the locking pieces 3, 3, ... are bent on the back side of the molded body to fix the heating element 2 to the molded body 1, and then the refractory material 5 is filled in the groove 4. It is also possible to create an embedded heater as shown in the figure by inserting the heater into the heater.
ここで、溝４に埋込まれる耐火材５としては、
セラミツクフアイバ短繊維をバインダと水とで混
練したもの、あるいはこれに更にアルミナ粉、シ
リカ粉等を加えたもの、もしくは、アルミナ粉、
シリカ粉、ジルコニア粉などをエチルシリケート
またはアルコールで混練したものが有効に使用さ
れる。 Here, as the refractory material 5 embedded in the groove 4,
Ceramic fiber short fibers kneaded with a binder and water, or to which alumina powder, silica powder, etc. are added, or alumina powder,
A material obtained by kneading silica powder, zirconia powder, etc. with ethyl silicate or alcohol is effectively used.
なお、上記の如き構成の埋設ヒータにおいて、
電気抵抗発熱体２の埋設されている側に、スラリ
ー状にした耐火材を含浸付着させて乾燥した耐火
材含浸付着層６を形成させると、セラミツクフア
イバ成形体１の表面層が強化され、該成形体の表
面のくずれがなく係止片３，３、……の係止効果
と相俟つて成形体からの発熱体の脱落がより効果
的に防止される。 In addition, in the buried heater configured as above,
By impregnating and adhering a refractory material in the form of a slurry to the side where the electric resistance heating element 2 is buried and forming a dry refractory material impregnated adhesion layer 6, the surface layer of the ceramic fiber molded body 1 is strengthened. There is no deformation of the surface of the molded body, and together with the locking effect of the locking pieces 3, 3, . . . , the heating element is more effectively prevented from falling off from the molded body.
また、耐火材含浸付着層６部分は、成形体１の
他の部分に比べその熱伝率が大であり、従つて、
発熱体から発生する熱を効果的に放散させ埋設ヒ
ータ自身の熱放散特性を改善するに有効である。 Further, the heat conductivity of the refractory material impregnated adhesion layer 6 portion is higher than that of other portions of the molded body 1, and therefore,
This is effective in effectively dissipating the heat generated from the heating element and improving the heat dissipation characteristics of the embedded heater itself.
ここで、成形体表面に含浸付着するスラリー状
耐火材としては、コロイダルシリカあるいはコロ
イダルアルミナなどが有効であるが、アルミナ
粉、ジルコニア粉、シリカ粉等の耐火材をエチル
シリケート等のバインダを含む溶液に加えてスラ
リー状にしたもの、あるいはこれに更にセラミツ
クフアイバの短繊維を混ぜたものなどが使用され
る。 Here, colloidal silica or colloidal alumina is effective as the slurry refractory material to be impregnated and adhered to the surface of the compact, but refractory materials such as alumina powder, zirconia powder, and silica powder are mixed with a solution containing a binder such as ethyl silicate. In addition to this, a slurry is used, or a mixture of ceramic fiber short fibers is used.
図は本考案の一例を示す断面図である。
図中、１……セラミツクフアイバー成形体、２
……電気抵抗発熱体、３……係止片、４……溝、
５……耐火材。
The figure is a sectional view showing an example of the present invention. In the figure, 1...ceramic fiber molded body, 2
... Electric resistance heating element, 3 ... Locking piece, 4 ... Groove,
5... Fireproof material.
Claims (1)
ツクフアイバ成形体、該溝内に配された電気抵抗
発熱体、該溝内に埋込まれた耐火材、および一端
が前記電気抵抗発熱体に係止され且つ他端が前記
セラミツクフアイバ成形体の他側に係止される係
止片とを有する発熱体埋設ヒータ。1 A ceramic fiber molded body having a plurality of grooves spaced apart on one side thereof, an electric resistance heating element arranged in the grooves, a refractory material embedded in the grooves, and one end of which is engaged with the electric resistance heating element. and a locking piece whose other end is locked to the other side of the ceramic fiber molded body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8814079A JPS5612987A (en) | 1979-07-13 | 1979-07-13 | Heating element imbedded heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8814079A JPS5612987A (en) | 1979-07-13 | 1979-07-13 | Heating element imbedded heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5612987A JPS5612987A (en) | 1981-02-07 |
| JPS6161031B2 true JPS6161031B2 (en) | 1986-12-23 |
Family
ID=13934621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8814079A Granted JPS5612987A (en) | 1979-07-13 | 1979-07-13 | Heating element imbedded heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5612987A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57183689U (en) * | 1981-05-19 | 1982-11-20 | ||
| JP2861746B2 (en) * | 1993-09-17 | 1999-02-24 | 日本電気株式会社 | Multi-cavity klystron and driving method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4812597U (en) * | 1971-06-23 | 1973-02-12 | ||
| JPS537748U (en) * | 1976-07-06 | 1978-01-23 |
-
1979
- 1979-07-13 JP JP8814079A patent/JPS5612987A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5612987A (en) | 1981-02-07 |
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