JPH0138874Y2 - - Google Patents
Info
- Publication number
- JPH0138874Y2 JPH0138874Y2 JP17362286U JP17362286U JPH0138874Y2 JP H0138874 Y2 JPH0138874 Y2 JP H0138874Y2 JP 17362286 U JP17362286 U JP 17362286U JP 17362286 U JP17362286 U JP 17362286U JP H0138874 Y2 JPH0138874 Y2 JP H0138874Y2
- Authority
- JP
- Japan
- Prior art keywords
- heating element
- furnace
- collar
- electrode
- suspended
- 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
- 238000010438 heat treatment Methods 0.000 claims description 35
- NFYLSJDPENHSBT-UHFFFAOYSA-N chromium(3+);lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+3].[La+3] NFYLSJDPENHSBT-UHFFFAOYSA-N 0.000 claims description 5
- 229910052573 porcelain Inorganic materials 0.000 claims description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 4
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052863 mullite Inorganic materials 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Resistance Heating (AREA)
- Furnace Details (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案はランタンクロマイト管による電気炉用
発熱体に関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a heating element for electric furnaces using a lanthanum chromite tube.
従来の技術とその問題点
従来、ランタンクロマイト管による電気炉用発
熱体として、発熱体下端を台に載せ、発熱体の上
側電極に取付けられたリード線により発熱体上側
を支持するという仕様の下に電気炉にセツトする
ものがあつた。Conventional technology and its problems Conventionally, as a heating element for an electric furnace using a lanthanum chromite tube, the lower end of the heating element is placed on a stand, and the upper side of the heating element is supported by a lead wire attached to the upper electrode of the heating element. There was something to set in the electric furnace.
この従来の電気炉用発熱体では、炉内の高温
（通常、1800℃）で発熱体の軸線歪みにおいて約
５〜10mmの曲がりが発生し、そのため当該曲がり
部分での折損、溶断または発熱体より発生する三
二酸化クロムから炉室を保護するため発熱体を覆
つているアルミナ、ジルコニア、ムライト質のチ
ユーブとの反応による溶断がみられ、発熱体の寿
命を低下していた。 In this conventional heating element for electric furnaces, a bend of about 5 to 10 mm occurs due to the axial strain of the heating element at the high temperature inside the furnace (usually 1800°C), and as a result, the heating element may break, melt, or break at the bent part. Melting occurred due to a reaction with the alumina, zirconia, and mullite tubes that cover the heating element to protect the furnace chamber from the generated chromium sesquioxide, reducing the lifespan of the heating element.
また従来の電気炉用発熱体では、炉体とこれを
貫通する発熱体上部との間の隙間から対流、輻射
によりかなりの熱が外部に出るため、発熱体の上
側電極周辺の温度は約500〜700℃と高かつた。こ
のため、電極部に使用している金属の安定性が劣
り、また電極部の使用金属の選択に制限があつ
た。 In addition, in conventional heating elements for electric furnaces, a considerable amount of heat escapes to the outside through convection and radiation through the gap between the furnace body and the upper part of the heating element that passes through it, so the temperature around the upper electrode of the heating element is approximately 500%. The temperature was as high as ~700℃. For this reason, the stability of the metal used in the electrode part was poor, and there were restrictions on the selection of the metal used in the electrode part.
本考案は曲がりが殆どなく、上記曲がりによる
弊害を除去でき、また上側電極周辺の温度を低下
させ、該電極部金属の安定化をはかることができ
る電気炉用発熱体を提供することを目的としてい
る。 The object of the present invention is to provide a heating element for an electric furnace that has almost no bending, can eliminate the adverse effects caused by the bending, and can lower the temperature around the upper electrode and stabilize the electrode metal. There is.
問題点を解決するための手段
上記本考案の目的は、ランタンクロマイト管に
よる電気炉用発熱体であつて、上部に耐熱性磁器
のつばを固定し、該つばにて電気炉の上面に吊り
架け、以て下端側を宙に浮かした状態下で炉にセ
ツトするようにした電気炉用発熱体によつて達成
される。Means for Solving the Problems The object of the present invention is to provide a heating element for an electric furnace using a lanthanum chromite tube. This is achieved by a heating element for an electric furnace that is set in a furnace with its lower end suspended in the air.
実施例
次に本考案の実施例を添付図面を参照して説明
する。Embodiments Next, embodiments of the present invention will be described with reference to the accompanying drawings.
図で１がランタンクロマイト管による電気炉用
発熱体であり、該発熱体１は上端側に電極２を、
下端側に電極３をそれぞれ有し、電極２，３には
リード線４，５が取付けられている。 In the figure, 1 is a heating element for an electric furnace made of a lanthanum chromite tube, and the heating element 1 has an electrode 2 on the upper end side.
Each has an electrode 3 on the lower end side, and lead wires 4 and 5 are attached to the electrodes 2 and 3, respectively.
該発熱体１の上部にアルミナ、ジルコニア、ム
ライト質等の耐熱性磁器のつば６を固定し、該つ
ば６にて電気炉７の上面に発熱体１を吊り架ける
ことにより、これを下端側が宙に浮いた状態下で
炉１にセツトする。発熱体１を炉１にセツトする
に当つては、必要に応じつば６と炉７の上面の間
にアルミナ、ジルコニア、ムライト質等の耐熱性
磁器のカラー８を介設してもよい。 A collar 6 made of heat-resistant porcelain such as alumina, zirconia, or mullite is fixed to the upper part of the heating element 1, and the heating element 1 is suspended from the upper surface of the electric furnace 7 by the collar 6, so that the lower end side is in the air. Set it in furnace 1 while floating on the surface. When the heating element 1 is set in the furnace 1, a collar 8 made of heat-resistant porcelain such as alumina, zirconia, or mullite may be interposed between the collar 6 and the upper surface of the furnace 7, if necessary.
９は発熱体１から発生する三二酸化クロムより
炉７室を保護するため発熱体１を覆つているアル
ミナ、ジルコニア、ムライト質のチユーブであ
る。 Reference numeral 9 denotes a tube made of alumina, zirconia, or mullite that covers the heating element 1 in order to protect the furnace chamber 7 from chromium sesquioxide generated from the heating element 1.
上記発熱体１の上部のつば６は、炉７上面に対
する該つばの載架により炉１に発熱体１をその下
端側は宙に浮かした状態とし上端側のみで吊架さ
せるのに寄与すると共に、炉７とこれを貫通する
発熱体１上部との間の隙間から熱が外部に出るの
を遮断する働きをする。 The upper collar 6 of the heating element 1 contributes to suspending the heating element 1 in the furnace 1 with its lower end suspended in the air by placing the collar on the upper surface of the furnace 7 and suspending it only at its upper end. , functions to block heat from going outside through the gap between the furnace 7 and the upper part of the heating element 1 passing through it.
考案の効果
上記のように本考案によれば、下端側は宙に浮
かした状態とし上端側のみで吊架した状態下に発
熱体を炉にセツトし得るから、炉内の高温下で従
来のような自重がかかることがないため、発熱体
が曲がることは殆どなく、曲がりによる弊害を除
去することができると共に、発熱体の寿命が向上
する。Effects of the invention As described above, according to the invention, the heating element can be set in the furnace with the lower end suspended in the air and only the upper end suspended. Since no such weight is applied to the heating element, the heating element is hardly bent, and the adverse effects caused by bending can be eliminated, and the life of the heating element is improved.
更にまた本考案では炉とこれを貫通する発熱体
上部との間の隙間から熱が外部に出るのを遮断し
得るので、発熱体の上側電極周辺の温度を低下さ
せ、該電極部金属の安定化をはかることができ
る。 Furthermore, with the present invention, it is possible to block heat from going outside through the gap between the furnace and the upper part of the heating element that passes through it, thereby lowering the temperature around the upper electrode of the heating element and improving the stability of the electrode metal. It is possible to make changes.
第１図は本考案の一実施例を示す縦断面図、第
２図は第１図の部の拡大図、第３図は第１図の
部の拡大図、第４図は第１図の平面図である。
１……発熱体、２，３……電極、４，５……リ
ード線、６……つば、７……炉、８……カラー。
Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is an enlarged view of the part shown in Fig. 1, Fig. 3 is an enlarged view of the part shown in Fig. 1, and Fig. 4 is an enlarged view of the part shown in Fig. 1. FIG. 1... Heating element, 2, 3... Electrode, 4, 5... Lead wire, 6... Collar, 7... Furnace, 8... Color.
Claims (1)
あつて、上部に耐熱性磁器のつばを固定し、該つ
ばにて電気炉の上面に吊り架け、以て下端側を宙
に浮かした状態下で炉にセツトするようにした電
気炉用発熱体。 This is a heating element for an electric furnace made of a lanthanum chromite tube. A heat-resistant porcelain collar is fixed to the upper part, and the collar is suspended from the upper surface of the electric furnace, so that the lower end is suspended in the air. A heating element for electric furnaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17362286U JPH0138874Y2 (en) | 1986-11-11 | 1986-11-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17362286U JPH0138874Y2 (en) | 1986-11-11 | 1986-11-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6379089U JPS6379089U (en) | 1988-05-25 |
| JPH0138874Y2 true JPH0138874Y2 (en) | 1989-11-20 |
Family
ID=31111256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17362286U Expired JPH0138874Y2 (en) | 1986-11-11 | 1986-11-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0138874Y2 (en) |
-
1986
- 1986-11-11 JP JP17362286U patent/JPH0138874Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6379089U (en) | 1988-05-25 |
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