JPS6129038Y2 - - Google Patents
Info
- Publication number
- JPS6129038Y2 JPS6129038Y2 JP1980125221U JP12522180U JPS6129038Y2 JP S6129038 Y2 JPS6129038 Y2 JP S6129038Y2 JP 1980125221 U JP1980125221 U JP 1980125221U JP 12522180 U JP12522180 U JP 12522180U JP S6129038 Y2 JPS6129038 Y2 JP S6129038Y2
- Authority
- JP
- Japan
- Prior art keywords
- primary coil
- iron core
- induction furnace
- inductor
- refractory
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 18
- 230000006698 induction Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000011823 monolithic refractory Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 description 11
- 230000008018 melting Effects 0.000 description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- General Induction Heating (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Furnace Details (AREA)
Description
【考案の詳細な説明】
本考案は、閉路鉄心と一次コイルとの固定構造
を改良した溝形誘導炉に関する。[Detailed Description of the Invention] The present invention relates to a channel induction furnace with an improved fixing structure between a closed iron core and a primary coil.
一般に溝形誘導炉は、鋳鉄、亜鉛あるいは銅合
金などの溶解保持用に広く用いられている。 In general, channel induction furnaces are widely used for melting and holding cast iron, zinc, copper alloys, and the like.
この溝形誘導炉は、被溶解物を溶解保持する上
部溶解室と、この上部溶解室の下部にこれと連通
して設けられ、電気エネルギーを熱エネルギーに
変換して被溶解物を加熱する発熱室とを備えてい
る。 This groove-shaped induction furnace has an upper melting chamber that melts and holds the material to be melted, and a lower part of the upper melting chamber that communicates with the upper melting chamber to generate heat that converts electrical energy into thermal energy and heats the material to be melted. It is equipped with a room.
この発熱室は、従来第１図および第２図に示す
るように構成されている。即ち断面略々四角形を
した閉路鉄心１の角部に棒状の絶縁固定物２を介
して一次コイル３が巻回されて電気エネルギーを
熱エネルギーに変換するインダクター４が形成さ
れているこのインダクター４の外周には間隔をお
いて円筒状の冷却筒５が設けられ、更に冷却筒５
の外周には耐火ランニング材６を隔てて上部溶解
室７に連通する溶湯の二次溝８が形成されてい
る。 This heat generating chamber has conventionally been constructed as shown in FIGS. 1 and 2. That is, a primary coil 3 is wound around a corner of a closed circuit iron core 1 having a substantially rectangular cross section via a rod-shaped insulating fixture 2 to form an inductor 4 that converts electrical energy into thermal energy. Cylindrical cooling cylinders 5 are provided at intervals on the outer periphery, and cooling cylinders 5 are provided at intervals.
A secondary groove 8 for molten metal is formed on the outer periphery of the molten metal, which communicates with the upper melting chamber 7 with the refractory running material 6 in between.
上記溝形誘導炉の発熱原理は、既に公知の原理
であつて、変圧器の原理を応用したもので、一次
コイル３の誘導電流を二次溝８内の溶湯に発生さ
せて誘導加熱を行い、加熱された溶湯は、二次溝
８と連通する上部溶解室７に対流循環して所定の
温度に保持される。 The heating principle of the groove induction furnace is already a well-known principle, and is an application of the principle of a transformer, in which an induced current in the primary coil 3 is generated in the molten metal in the secondary groove 8 to perform induction heating. The heated molten metal is circulated by convection in the upper melting chamber 7 communicating with the secondary groove 8 and is maintained at a predetermined temperature.
この溝形誘導炉の発熱室では、電気エネルギー
を熱エネルギーに変換する際に生ずる一次コイル
３からの銅損、および閉路鉄心１からの鉄損など
により、かなりの熱が発生する。従来の構造の発
熱室では、この発熱を一次コイル３に冷却水を通
水して冷却させると共に、閉路鉄心１は鉄心断面
積を大きくして磁束密度を小さくし発熱を低く抑
え、更にインダクター４を構成する閉路鉄心１
と、一次コイル３との間隙に、強制風冷フアン９
により冷却風を通風させて冷却し、インダクター
４を熱的な悪影響から保護している。 In the heat generating chamber of this channel induction furnace, a considerable amount of heat is generated due to copper loss from the primary coil 3 and iron loss from the closed circuit iron core 1 that occur when electrical energy is converted into thermal energy. In a heat generation chamber with a conventional structure, this heat generation is cooled by passing cooling water through the primary coil 3, and the closed circuit iron core 1 has a large cross-sectional area to reduce the magnetic flux density to suppress heat generation. Closed circuit core 1 that constitutes
A forced air cooling fan 9 is installed between the primary coil 3 and the primary coil 3.
This allows cooling air to pass through and cool the inductor 4, thereby protecting the inductor 4 from adverse thermal effects.
しかしながらこのような閉路鉄心１と一次コイ
ル３との間に間隙があるインダクター４では一次
コイル３への通電による振動等により、棒状の絶
縁固定物２が損傷脱落したり、あるいは溶湯飛散
の巻込みや、導電性のある塵埃などが侵入して付
着し、閉路鉄心１と一次コイル３との間でレヤー
シヨートを誘発することがある。このようなレヤ
ーシヨートが発生すると、インダクター４を溶損
し、遂には溝形誘導炉の操業停止に至るなどの欠
点があつた。またインダクター４の組立のため
に、閉路鉄心１の角部に棒状の絶縁固定物２を介
在させて一次コイル３を取付けなければならず、
組立て作業もめんどうであつた。 However, in such an inductor 4 where there is a gap between the closed circuit iron core 1 and the primary coil 3, the rod-shaped insulating fixed object 2 may be damaged or fall off due to vibrations caused by energizing the primary coil 3, or the molten metal may become trapped. , conductive dust, etc. may enter and adhere thereto, inducing layer short between the closed circuit iron core 1 and the primary coil 3. When such a layer shod occurs, the inductor 4 is melted and damaged, which ultimately leads to the shutdown of the channel induction furnace. Furthermore, in order to assemble the inductor 4, the primary coil 3 must be attached to the corner of the closed circuit iron core 1 with a rod-shaped insulating fixture 2 interposed therebetween.
Assembly work was also troublesome.
本考案は上記欠点を除去し、レヤーシヨートに
よるインダクターの溶損事故を防止して、安定し
た操業を行うことができると共に、組立て作業性
を向上させた溝形誘導炉を提供することを目的と
するものである。 The purpose of the present invention is to eliminate the above-mentioned drawbacks, prevent inductor melting accidents due to layer shots, and provide a trench induction furnace that can perform stable operations and improve assembly workability. It is something.
以下、本考案を図面に示す一実施例を参照して
詳細に説明する。 Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings.
第３図および第４図は本考案の一実施例を示す
もので、耐火ランニング材６により、被溶解物を
収容する上部溶解室７が形成され、更にこの下部
に発熱室が設けられている。この発熱室は前記上
部溶解室７の底部に設けられた開口１０に連通
し、耐火ランニング材６で形成された略環状の二
次溝８と、この中央部に設けられたインダクター
４とから構成されている。 FIGS. 3 and 4 show an embodiment of the present invention, in which an upper melting chamber 7 for accommodating the material to be melted is formed by a refractory running material 6, and a heat generating chamber is provided below this. . This heat generating chamber communicates with an opening 10 provided at the bottom of the upper melting chamber 7, and is composed of a substantially annular secondary groove 8 formed of a refractory running material 6, and an inductor 4 provided in the center thereof. has been done.
前記インダクター４は二次溝８を構成する耐火
ランニング材６の中央部に、枠状をなす閉路鉄心
１の一脚部を挿着し、この外周に銅線を巻回して
一次コイル３を形成している。また前記閉路鉄心
１と一次コイル３との間には、キヤスタブルセメ
ント、モルタルなどの耐熱絶縁性を有する不定形
耐火物１１を充填して一体構成となつている。 The inductor 4 is constructed by inserting one leg of a frame-shaped closed loop iron core 1 into the center of a refractory running material 6 constituting a secondary groove 8, and forming a primary coil 3 by winding a copper wire around the outer periphery of the leg. are doing. Moreover, a monolithic refractory material 11 having heat-resistant insulation, such as castable cement or mortar, is filled between the closed circuit iron core 1 and the primary coil 3 to form an integral structure.
この一次コイル３の外周には間隔をおいて、金
属板からなる冷却筒５が二次溝８を形成する耐火
ランニング材６の内側を覆うように設けられてい
る。更にこの冷却筒５の一方の開口端側には強制
風冷フアン９が取付けられ、冷却風を一次コイル
３と冷却筒５との間の間隔に通風するようになつ
ている。 Cooling cylinders 5 made of metal plates are provided at intervals around the outer circumference of the primary coil 3 so as to cover the inside of the refractory running material 6 forming the secondary grooves 8. Further, a forced-air cooling fan 9 is attached to one open end side of the cooling cylinder 5 to blow cooling air into the space between the primary coil 3 and the cooling cylinder 5.
従つて上記構成の本考案による溝形誘導炉によ
れば、閉路鉄心１と一次コイル３との間に不定形
耐火物１１が充填され、一体に固定されているの
で、一次コイル３の誘導電流によつて二次溝８内
の溶湯を誘動加熱する際に生ずるインダクター４
の振動によつても不定形耐火物１１の脱落がな
く、強固に保持され、レヤーシヨートを防止でき
る。 Therefore, according to the channel induction furnace of the present invention having the above configuration, the monolithic refractory 11 is filled between the closed circuit iron core 1 and the primary coil 3 and are fixed together, so that the induced current in the primary coil 3 is reduced. The inductor 4 generated when the molten metal in the secondary groove 8 is inductively heated by
The monolithic refractory 11 does not fall off even when subjected to vibrations, is firmly held, and layering can be prevented.
また閉路鉄心１と一次コイル３との間に間隙が
ないので、外部からの溶湯飛散の巻込みや、導電
性のある塵埃の侵入付着がなく、これらに起因す
るレヤーシヨートも確実に防止することができ
る。 In addition, since there is no gap between the closed circuit iron core 1 and the primary coil 3, there is no entrainment of molten metal scattering from the outside, no infiltration of conductive dust, and layer shorts caused by these can be reliably prevented. can.
更にインダクター４を組立てる場合にも、従来
の如く絶縁固定物２を介在させる必要がなく、単
に不定形耐火物１１を充填固化させるだけで良い
ので、組立作業性にも優れている。 Further, when assembling the inductor 4, there is no need to interpose the insulating fixture 2 as in the conventional case, and it is sufficient to simply fill and solidify the monolithic refractory 11, so that the assembling workability is excellent.
なお、上記実施例では、一次コイル３として銅
線を用いた場合について示したが、水冷銅管を巻
回して一次コイル３としたものでもよい。この構
造のものは一次コイル３からの銅損をコイル自身
で冷却することができると共に、充填した不定形
耐火物１１の熱伝導により閉路鉄心１からの鉄損
による発熱を併せて効率よく冷却することができ
る。この結果、磁束密度を増大させても十分に冷
却できるので、閉路鉄心断面を小さくできると共
に、これに伴つて巻回される一次コイル３、およ
びこれを囲む冷却筒５などを小型化できることか
ら、発熱室全体の小型化を図ることができる。 In the above embodiment, a copper wire is used as the primary coil 3, but the primary coil 3 may be formed by winding a water-cooled copper tube. With this structure, the copper loss from the primary coil 3 can be cooled by the coil itself, and the heat generated by the iron loss from the closed circuit iron core 1 can also be efficiently cooled by the heat conduction of the filled monolithic refractory 11. be able to. As a result, sufficient cooling can be achieved even when the magnetic flux density is increased, so the cross section of the closed circuit core can be made smaller, and the primary coil 3 wound thereon and the cooling tube 5 surrounding it can also be made smaller. The entire heat generating chamber can be downsized.
また本考案は水冷銅管で一次コイル３を構成す
る場合に限らず、冷却筒５自体にも水冷管を取付
けて全体を水冷することにより、強制風冷フアン
９を省いた構造のものにも適用することができ
る。 Furthermore, the present invention is not limited to the case where the primary coil 3 is configured with a water-cooled copper tube, but can also be applied to a structure in which the forced air cooling fan 9 is omitted by attaching a water-cooling tube to the cooling cylinder 5 itself and cooling the entire body with water. Can be applied.
以上説明した如く、本考案によれば、閉路鉄心
と一次コイルとの間に耐熱絶縁性を有する不定形
耐火物を充填することにより、レヤーシヨートに
よるインダクターの溶損事故を防止して、安定し
た操業を行うことができると共に、組立作業性を
向上させた溝形誘導炉を得ることができる。 As explained above, according to the present invention, by filling the space between the closed circuit iron core and the primary coil with a monolithic refractory having heat-resistant insulation, it is possible to prevent the melting of the inductor due to the layer short, thereby ensuring stable operation. In addition, it is possible to obtain a groove-shaped induction furnace with improved assembly workability.
第１図は従来の溝形誘導炉を示す縦断正面図、
第２図は第１図の縦断側面図、第３図は本考案の
一実施例による溝形誘導炉を示す縦断正面図、第
４図は第３図の縦断側面図である。
１……閉路鉄心、２……絶縁固定物、３……一
次コイル、４……インダクター、５……冷却筒、
６……耐火ランニング材、７……上部溶解室、８
……二次溝、９……強制風冷フアン、１０……開
口、１１……不定形耐火物。
Figure 1 is a longitudinal sectional front view showing a conventional channel induction furnace.
2 is a longitudinal sectional side view of FIG. 1, FIG. 3 is a longitudinal sectional front view showing a channel induction furnace according to an embodiment of the present invention, and FIG. 4 is a longitudinal sectional side view of FIG. 3. 1...Closed iron core, 2...Insulating fixed object, 3...Primary coil, 4...Inductor, 5...Cooling tube,
6... Fireproof running material, 7... Upper melting chamber, 8
... Secondary groove, 9 ... Forced air cooling fan, 10 ... Opening, 11 ... Monolithic refractory.
Claims (1)
却筒を有し、更にこの外周に耐火ランニング材で
形成された溶湯の二次溝を設けた溝形誘導炉にお
いて、前記閉路鉄心と、一次コイルとの間に耐熱
絶縁性を有する不定形耐火物を充填したことを特
徴とする溝形誘導炉。 In a channel induction furnace, a cooling cylinder is provided on the outer periphery of a primary coil wound around a closed iron core, and a secondary groove for molten metal formed of a refractory running material is provided on the outer periphery. A channel induction furnace characterized in that a monolithic refractory having heat-resistant insulation is filled between the coil and the coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980125221U JPS6129038Y2 (en) | 1980-09-03 | 1980-09-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980125221U JPS6129038Y2 (en) | 1980-09-03 | 1980-09-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5749699U JPS5749699U (en) | 1982-03-20 |
| JPS6129038Y2 true JPS6129038Y2 (en) | 1986-08-27 |
Family
ID=29485705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980125221U Expired JPS6129038Y2 (en) | 1980-09-03 | 1980-09-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6129038Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5385453A (en) * | 1977-01-06 | 1978-07-27 | Canon Inc | Distance detecting method |
-
1980
- 1980-09-03 JP JP1980125221U patent/JPS6129038Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5385453A (en) * | 1977-01-06 | 1978-07-27 | Canon Inc | Distance detecting method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5749699U (en) | 1982-03-20 |
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