JPS644076Y2 - - Google Patents
Info
- Publication number
- JPS644076Y2 JPS644076Y2 JP8166484U JP8166484U JPS644076Y2 JP S644076 Y2 JPS644076 Y2 JP S644076Y2 JP 8166484 U JP8166484 U JP 8166484U JP 8166484 U JP8166484 U JP 8166484U JP S644076 Y2 JPS644076 Y2 JP S644076Y2
- Authority
- JP
- Japan
- Prior art keywords
- crucible
- antenna wire
- end surface
- heat
- electrode
- 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
- 239000000463 material Substances 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- PDKHNCYLMVRIFV-UHFFFAOYSA-H molybdenum;hexachloride Chemical compound [Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Mo] PDKHNCYLMVRIFV-UHFFFAOYSA-H 0.000 claims 1
- 239000011449 brick Substances 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 239000011823 monolithic refractory Substances 0.000 description 3
- YXTPWUNVHCYOSP-UHFFFAOYSA-N bis($l^{2}-silanylidene)molybdenum Chemical compound [Si]=[Mo]=[Si] YXTPWUNVHCYOSP-UHFFFAOYSA-N 0.000 description 2
- 229910021344 molybdenum silicide Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910016006 MoSi Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910000953 kanthal Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
Landscapes
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Furnace Details (AREA)
Description
【考案の詳細な説明】
（考案の属する技術分野〕
この考案は定形るつぼ形誘導炉において、るつ
ぼの湯漏れ検出用アンテナ線の溶断を防止するこ
とができるように改良したものに関する。[Detailed description of the invention] (Technical field to which the invention pertains) This invention relates to a fixed crucible-shaped induction furnace that is improved so as to be able to prevent melt cutting of the antenna wire for detecting leakage of the crucible.
定形るつぼ形誘導炉の従来例を第２図にもとづ
いて説明する。この図において、黒鉛からなる定
形るつぼ１が有底筒状の炉体２に挿入支持されて
いる。前記炉体２は筒状絶縁物３の外周に巻装し
た誘導加熱コイル４を二層の耐火断熱れんが５と
その中間の不定形耐火物６との三層からなる底壁
に載置した後コイル４の外周を耐火絶縁物７７で
包囲して形成される。前記るつぼ１と絶縁物３の
間にはすきまが設けられ、るつぼ１の減耗時に炉
体２をはく離等で損傷することなくるつぼ１を取
替えできるようにするためにるつぼ１の下部と炉
体２の間に粉末状の耐火離形剤８が充てんされて
いる。前記炉体２には底壁を貫通して先端部がる
つぼ１の底部下面と接触する湯漏れ検出用アンテ
ナ線９が設けられている。このアンテナ線９はコ
イル４との間に直流電圧を印加し、るつぼ１内の
金属溶湯１０が漏出してアンテナ線９とコイル４
に接触するとランプまたはブザー等で警報を出し
て湯漏れの発生によるコイル４の焼損を防止する
ためのもので、耐熱性と可とう性を備えたけい化
モリブデンMoSi2系材（商品名カンタル線等）で
形成される。
A conventional example of a regular crucible induction furnace will be explained based on FIG. In this figure, a regular crucible 1 made of graphite is inserted and supported in a cylindrical furnace body 2 with a bottom. The furnace body 2 is constructed by placing an induction heating coil 4 wound around the outer periphery of a cylindrical insulator 3 on a bottom wall consisting of three layers: two layers of refractory insulation bricks 5 and a monolithic refractory 6 in the middle. It is formed by surrounding the outer periphery of the coil 4 with a fireproof insulator 77. A gap is provided between the crucible 1 and the insulator 3, so that when the crucible 1 wears out, the crucible 1 can be replaced without damaging the furnace body 2 due to peeling or the like. A powdered refractory mold release agent 8 is filled in between. The furnace body 2 is provided with a leakage detection antenna wire 9 that penetrates the bottom wall and whose tip comes into contact with the lower surface of the bottom of the crucible 1. A DC voltage is applied between the antenna wire 9 and the coil 4, and the molten metal 10 in the crucible 1 leaks out between the antenna wire 9 and the coil 4.
This is a heat-resistant and flexible molybdenum silicide MoSi 2- based material (product name: Kanthal wire) that will issue an alarm with a lamp or buzzer when it comes into contact with the coil 4. etc.).
このような構造ではるつぼ１の底部下面が1000
℃以上の高温となりかつアンテナ線９の断面積が
小さいので、アンテナ線９が溶断して湯漏れ検出
不能となることがあるという欠点があつた。 With this structure, the bottom surface of crucible 1 is 1000
Since the temperature is higher than 0.degree. C. and the cross-sectional area of the antenna wire 9 is small, there is a drawback that the antenna wire 9 may melt and melt leakage cannot be detected.
この考案は前記の欠点を除去するために、湯漏
れ検出用アンテナ線の溶断を防止することができ
るようにした定形るつぼ形誘導炉を提供すること
を目的とする。
In order to eliminate the above-mentioned drawbacks, the object of this invention is to provide a regular crucible-shaped induction furnace that can prevent the antenna wire for detecting hot water leakage from melting down.
この考案は前記の目的を達成するために、耐熱
性を備えた炭化けい素系材からなる機械的強度の
大きい棒状電極をその一端面をるつぼの底部下面
に接触させて設け、この電極の他端面にけい化モ
リブデン系材からなるアンテナ線を接続して溶断
を防止しようとするものである。
In order to achieve the above-mentioned object, this invention provides a mechanically strong rod-shaped electrode made of a heat-resistant silicon carbide material with one end surface in contact with the lower surface of the bottom of the crucible. An antenna wire made of molybdenum silicide material is connected to the end face to prevent melting.
第１図はこの考案の実施例を示すもので、第２
図と同一符号で示すものは同一部品である。この
図において、炉体２の底壁の内側耐火断熱れんが
５に棒状電極１９が上下方向に埋設され、アンテ
ナ線９が外側耐火断熱れんが５と中間の不定形耐
火物６を貫通して電極１９の下端面に接続されて
いる。前記電極１９は1500℃前後の高温に耐える
耐熱性を備えた炭化けい素SiC系材でかつ機械的
強度の大きい棒状に形成され、上端面がるつぼ１
の自重で押しつけてその底部下面と接触するよう
になつている。前記不定形耐火物６部の温度は一
般に300℃程度以下であるのでアンテナ線９が溶
断することはない。
Figure 1 shows an embodiment of this invention.
Components indicated by the same reference numerals as those in the figures are the same parts. In this figure, a rod-shaped electrode 19 is buried vertically in the inner refractory insulating brick 5 of the bottom wall of the furnace body 2, and the antenna wire 9 penetrates the outer refractory insulating brick 5 and the intermediate monolithic refractory 6 to form the electrode 19. is connected to the lower end surface of the The electrode 19 is made of a silicon carbide SiC material with heat resistance that can withstand high temperatures of around 1500°C and is formed into a rod shape with high mechanical strength, and the upper end surface is similar to the crucible 1.
It is designed to be pressed by its own weight and come into contact with the lower surface of its bottom. Since the temperature of the monolithic refractory 6 is generally about 300° C. or lower, the antenna wire 9 will not melt.
この考案によれば定形るつぼ形誘導炉におい
て、耐熱性を備えた炭化けい素系材からなる機械
的強度の大きい棒状電極をその一端面をるつぼの
底部下面に接触させて設け、この電極の他端面に
湯漏れ検出用アンテナ線を接続するようにしたの
で、アンテナ線部が低温となり、これによりアン
テナ線の溶断による湯漏れ検出不能を防止するこ
とができるという効果が得られる。
According to this invention, in a regular crucible-shaped induction furnace, a mechanically strong rod-shaped electrode made of a heat-resistant silicon carbide material is provided with one end surface in contact with the lower surface of the bottom of the crucible. Since the antenna wire for detecting hot water leakage is connected to the end face, the temperature of the antenna wire portion becomes low, thereby making it possible to prevent the inability to detect hot water leakage due to melting of the antenna wire.
第１図はこの考案の実施例の縦断面図、第２図
は従来例の縦断面図である。
１……るつぼ、９……アンテナ線、１９……電
極。
FIG. 1 is a longitudinal sectional view of an embodiment of this invention, and FIG. 2 is a longitudinal sectional view of a conventional example. 1... Crucible, 9... Antenna wire, 19... Electrode.
Claims (1)
強度の大きい棒状電極をその一端面をるつぼの底
部下面に接触させて設け、この電極の他端面に耐
熱性と可とう性を備えたけい化モリブデン系材か
らなる前記るつぼの湯漏れ検出用アンテナ線を接
続してなることを特徴とする定形るつぼ形誘導
炉。 A mechanically strong rod-shaped electrode made of a heat-resistant silicon carbide-based material is provided with one end surface in contact with the lower surface of the bottom of the crucible, and a heat-resistant and flexible rod-shaped electrode is provided on the other end surface of the electrode. A regular crucible-shaped induction furnace, characterized in that the crucible is made of a molybdenum chloride-based material and is connected to an antenna wire for detecting leakage of hot water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8166484U JPS60194298U (en) | 1984-06-01 | 1984-06-01 | Fixed crucible induction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8166484U JPS60194298U (en) | 1984-06-01 | 1984-06-01 | Fixed crucible induction furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60194298U JPS60194298U (en) | 1985-12-24 |
| JPS644076Y2 true JPS644076Y2 (en) | 1989-02-02 |
Family
ID=30628654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8166484U Granted JPS60194298U (en) | 1984-06-01 | 1984-06-01 | Fixed crucible induction furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60194298U (en) |
-
1984
- 1984-06-01 JP JP8166484U patent/JPS60194298U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60194298U (en) | 1985-12-24 |
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