JPH09270293A - Heater terminal rod of heat treatment furnace - Google Patents
Heater terminal rod of heat treatment furnaceInfo
- Publication number
- JPH09270293A JPH09270293A JP7892296A JP7892296A JPH09270293A JP H09270293 A JPH09270293 A JP H09270293A JP 7892296 A JP7892296 A JP 7892296A JP 7892296 A JP7892296 A JP 7892296A JP H09270293 A JPH09270293 A JP H09270293A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- terminal rod
- heater
- heater terminal
- heat treatment
- 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.)
- Withdrawn
Links
Landscapes
- Coating By Spraying Or Casting (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Resistance Heating (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、炉内に配設された
電気抵抗式電熱ヒーターにより被熱処理材を加熱、均熱
あるいは徐冷する熱処理炉において、ヒーター絶縁不良
による通電不能をなくし、安定して通電可能な電熱ヒー
ターのヒーター端子棒に関する。TECHNICAL FIELD The present invention relates to a heat treatment furnace for heating, soaking or slowly cooling a material to be heat treated by an electric resistance type electric heater arranged in the furnace, thereby eliminating a failure of energization due to poor insulation of the heater and stabilizing the heat treatment. The present invention relates to a heater terminal rod of an electric heater that can be energized with electricity.
【０００２】[0002]
【従来の技術】図２は、従来の熱処理炉における電熱ヒ
ーターのヒーター端子棒の構造を示す。ヒーター端子棒
１は、炉内に配設された電熱ヒーター２と溶接等で接合
されており、厚さｌの炉壁を貫通して炉外に突出してい
る。炉外において、ヒーター端子棒１は電源ケーブル３
と接続金物９及び圧着端子４にて結線されている。ま
た、熱処理炉内は不活性ガス或いは還元性ガスにより充
満されており、これらの炉内雰囲気ガスが炉外へ漏洩す
るのを防止する必要がある為、ヒーター端子棒１はパッ
キン５及び１０によって炉内雰囲気ガスをシールしてい
る。2. Description of the Related Art FIG. 2 shows a structure of a heater terminal rod of an electric heater in a conventional heat treatment furnace. The heater terminal rod 1 is joined to the electric heater 2 arranged in the furnace by welding or the like, and penetrates the furnace wall having a thickness of 1 to project outside the furnace. Outside the furnace, the heater terminal rod 1 is connected to the power cable 3
And the connection hardware 9 and the crimp terminal 4. Further, since the inside of the heat treatment furnace is filled with an inert gas or a reducing gas, and it is necessary to prevent the atmosphere gas inside the furnace from leaking out of the furnace, the heater terminal rod 1 is packed by the packings 5 and 10. The atmosphere gas in the furnace is sealed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来の熱処理炉で使用されるヒーター端子棒では、炉昇温
時に一時的にヒーターの絶縁が悪くなり、最悪の場合は
漏電によりヒーターの通電が不能になることが生じてい
た。これは、定期修繕などで炉を大気開放した状態で一
定期間停止し、その後、再び昇温作業を開始する場合に
多発するトラブルである。However, in the heater terminal rod used in the above-mentioned conventional heat treatment furnace, the insulation of the heater is temporarily deteriorated when the temperature of the furnace is raised, and in the worst case, the heater cannot be energized due to electric leakage. Was happening. This is a frequent problem when the furnace is left open to the atmosphere for a fixed period of time due to periodic repairs or the like, and then the temperature raising work is started again.
【０００４】すなわち、炉を開放した状態で大気中の湿
分が炉壁の断熱材、特に鉄皮側内面に内張りされている
断熱ボードやセラミックファイバー等に吸湿され、昇温
作業の過程で吸湿された水分がヒーター端子棒と鉄皮の
間の空間部で高湿度状態で滞留するか、あるいは鉄皮内
面側で結露することに起因し、ヒーターの絶縁抵抗が低
下するものであった。本発明は、上記課題を解決するこ
とを目的とするものである。That is, with the furnace open, moisture in the atmosphere is absorbed by the heat insulating material of the furnace wall, especially the heat insulating board or ceramic fiber lined on the inner surface of the iron shell side, and is absorbed in the process of raising the temperature. The insulation resistance of the heater was lowered due to the accumulated water staying in a space between the heater terminal rod and the iron skin in a high humidity state or dew condensation on the inner surface of the iron skin. An object of the present invention is to solve the above problems.
【０００５】[0005]
【課題を解決するための手段】本発明請求項１に係わる
熱処理炉のヒーター端子棒は、炉内ヒーターと溶接等で
接合され、炉壁を貫通して炉外に突出し、炉外で電源ケ
ーブルと結線されているヒーター端子棒において、Ａｌ
2 Ｏ3 を主成分とする絶縁碍子スリーブをヒーター端子
棒の鉄皮側に遊挿したことを特徴とするものである。ま
た、本発明請求項２に係わる熱処理炉のヒーター端子棒
は、炉内ヒーターと溶接等で接合され、炉壁を貫通して
炉外に突出し、炉外で電源ケーブルと結線されているヒ
ーター端子棒において、ヒーター端子棒表面を絶縁特性
を有するセラミックスで溶射したことを特徴とするもの
である。本発明の熱処理炉のヒーター端子棒によれば、
構造が簡単な絶縁スリーブを設けるだけで、或いは、ヒ
ーター端子棒の表面を溶射するだけで、ヒーター端子棒
に起因する炉昇温時の漏電トラブルを防止できる。The heater terminal rod of the heat treatment furnace according to claim 1 of the present invention is joined to the heater inside the furnace by welding or the like, penetrates through the furnace wall and projects outside the furnace, and the power cable outside the furnace. In the heater terminal bar connected with
It is characterized in that an insulator sleeve containing 2 O 3 as a main component is loosely inserted in the iron skin side of the heater terminal rod. The heater terminal rod of the heat treatment furnace according to claim 2 of the present invention is joined to the heater inside the furnace by welding or the like, penetrates through the furnace wall and protrudes outside the furnace, and is connected to the power cable outside the furnace. In the rod, the surface of the heater terminal rod is sprayed with a ceramic having an insulating property. According to the heater terminal rod of the heat treatment furnace of the present invention,
Only by providing an insulating sleeve having a simple structure or by spraying the surface of the heater terminal rod, it is possible to prevent an electric leakage trouble at the time of heating the furnace due to the heater terminal rod.
【０００６】[0006]
【発明の実施の形態】本発明による熱処理炉のヒーター
端子棒の実施例について、図１（Ａ）、（Ｂ）を参照し
て説明する。尚、上記従来例と同一構成部分は、同符号
を付してその説明を省略する。本発明の熱処理炉のヒー
ター端子棒においては、図１（Ａ）に示す様にヒーター
端子棒１にＡｌ2 Ｏ3 を主成分とする絶縁碍子スリーブ
１ａが鉄皮面側に遊挿されている。或いは、図１（Ｂ）
に示す様にヒーター端子棒１の表面を絶縁特性を有する
セラミックス皮膜１ｂを溶射している。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a heater terminal rod of a heat treatment furnace according to the present invention will be described with reference to FIGS. 1 (A) and 1 (B). The same components as those in the above-mentioned conventional example are designated by the same reference numerals, and the description thereof will be omitted. In the heater terminal rod of the heat treatment furnace of the present invention, as shown in FIG. 1 (A), an insulator sleeve 1a containing Al 2 O 3 as a main component is loosely inserted in the iron surface of the heater terminal rod 1. . Alternatively, FIG. 1 (B)
As shown in (1), the surface of the heater terminal rod 1 is sprayed with a ceramic coating 1b having insulating properties.
【０００７】熱処理炉を定期修繕等の為に炉を大気開放
して一定期間中停止し、その後再び昇温を開始した場
合、炉壁の断熱材８に吸湿された大気中の湿分が、昇温
により炉内側から温度の低い鉄皮７側に移動し、鉄皮内
７面部で結露するか、もしくは、ヒーター端子棒１と鉄
皮７の間の空間で高湿度状態で滞留するが、Ａｌ2 Ｏ3
を主成分とする絶縁碍子スリーブ１ａ、もしくは、絶縁
特性を有するセラミックス皮膜１ｂにより遮蔽されるた
め、ターミナル棒と鉄皮の間で漏電トラブルを生じるこ
とはない。発明者らは絶縁碍子スリーブ１ａの長さある
いは、絶縁特性を有するセラミックス皮膜１ｂの溶射範
囲を、断熱材の厚さｌに対して２０〜５０％以上とする
ことにより十分な効果が得られることを見出した。When the heat treatment furnace is opened to the atmosphere for periodic repairs and stopped for a certain period of time, and then the temperature is restarted, moisture in the atmosphere absorbed by the heat insulating material 8 on the furnace wall is When the temperature rises, it moves from the inside of the furnace to the side of the lower temperature iron 7 and condenses on the inner surface of the iron 7 or stays in the space between the heater terminal rod 1 and the iron 7 in a high humidity state. Al 2 O 3
Since it is shielded by the insulator sleeve 1a containing as a main component or the ceramic film 1b having insulating properties, there is no occurrence of electric leakage trouble between the terminal rod and the iron shell. The inventors can obtain a sufficient effect by setting the length of the insulator sleeve 1a or the thermal spraying range of the ceramic coating 1b having insulating properties to 20 to 50% or more with respect to the thickness l of the heat insulating material. Found.
【０００８】[0008]
【発明の効果】以上説明した様に、本発明による熱処理
炉のヒーター端子棒においては、炉壁を貫通するヒータ
ー端子棒の鉄皮側にＡｌ2 Ｏ3 を主成分とする絶縁スリ
ーブを遊挿するか、もしくは、絶縁特性を有するセラミ
ックスをヒーター端子棒に溶射するだけで、炉昇温時の
漏電トラブルを回避でき、熱処理炉を短時間で定常運転
状態にすることが可能になる。As described above, in the heater terminal rod of the heat treatment furnace according to the present invention, the insulating sleeve containing Al 2 O 3 as a main component is loosely inserted into the iron shell side of the heater terminal rod which penetrates the furnace wall. Alternatively, or only by spraying the ceramics having insulating properties onto the heater terminal rod, it is possible to avoid the electric leakage trouble at the time of heating the furnace, and to bring the heat treatment furnace into a steady operation state in a short time.
【図１】本発明の熱処理炉のヒーター端子棒の一実施例
を示す図、FIG. 1 is a diagram showing an example of a heater terminal rod of a heat treatment furnace of the present invention,
【図２】従来の熱処理炉のヒーター端子棒の一例を示す
図である。FIG. 2 is a diagram showing an example of a heater terminal rod of a conventional heat treatment furnace.
1 ヒーター端子棒 １a 絶縁碍子スリーブ １b 絶縁セラミックス皮膜 2 電熱ヒーター 3 電源ケーブル 4 圧着端子 5 パッキン 6 絶縁ベース 7 鉄皮 8 断熱材 9 接続金物 1 0 パッキン 1 1 パッキン押え 1 Heater terminal rod 1a Insulator sleeve 1b Insulating ceramic film 2 Electric heater 3 Power cable 4 Crimp terminal 5 Packing 6 Insulation base 7 Iron shell 8 Insulation material 9 Connection hardware 1 0 Packing 1 1 Packing foot
Claims (2)
されたヒーター端子棒が、炉壁を貫通して炉外に突出し
炉外の電源ケーブルと結線されている熱処理炉の電気抵
抗式電熱ヒーターにおいて、前記ヒーター端子棒の鉄皮
面側にＡｌ2Ｏ3 を主成分とする絶縁碍子スリーブを遊
挿したことを特徴とする熱処理炉のヒーター端子棒。1. An electric resistance type electric heating for a heat treatment furnace in which a heater terminal rod joined to a heater in the heat treatment furnace by welding or the like penetrates through the furnace wall and projects outside the furnace to be connected to a power cable outside the furnace. In the heater, a heater terminal rod of a heat treatment furnace, characterized in that an insulator sleeve having Al 2 O 3 as a main component is loosely inserted on the iron surface side of the heater terminal rod.
されたヒーター端子棒が、炉壁を貫通して炉外に突出し
炉外の電源ケーブルと結線されている熱処理炉の電気抵
抗式電熱ヒーターにおいて、前記ヒーター端子棒の表面
を絶縁特性を有するセラミックスで溶射したことを特徴
とする熱処理炉のヒーター端子棒。2. An electric resistance type electric heating of a heat treatment furnace in which a heater terminal rod joined to a heater in the heat treatment furnace by welding or the like penetrates the furnace wall and projects outside the furnace to be connected to a power cable outside the furnace. In the heater, a heater terminal rod of a heat treatment furnace, characterized in that the surface of the heater terminal rod is sprayed with a ceramic having insulating properties.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7892296A JPH09270293A (en) | 1996-04-01 | 1996-04-01 | Heater terminal rod of heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7892296A JPH09270293A (en) | 1996-04-01 | 1996-04-01 | Heater terminal rod of heat treatment furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09270293A true JPH09270293A (en) | 1997-10-14 |
Family
ID=13675360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7892296A Withdrawn JPH09270293A (en) | 1996-04-01 | 1996-04-01 | Heater terminal rod of heat treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09270293A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009247637A (en) * | 2008-04-08 | 2009-10-29 | Tiger Vacuum Bottle Co Ltd | Electric rice cooker |
| CN115340301A (en) * | 2021-05-12 | 2022-11-15 | 韩国光洋热电系统有限公司 | Heater unit of heat treatment furnace |
-
1996
- 1996-04-01 JP JP7892296A patent/JPH09270293A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009247637A (en) * | 2008-04-08 | 2009-10-29 | Tiger Vacuum Bottle Co Ltd | Electric rice cooker |
| CN115340301A (en) * | 2021-05-12 | 2022-11-15 | 韩国光洋热电系统有限公司 | Heater unit of heat treatment furnace |
| CN115340301B (en) * | 2021-05-12 | 2024-04-19 | 韩国捷太格特热处理设备有限公司 | Heater unit of heat treatment furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20030603 |