JPH05167103A - Thermocouple - Google Patents
ThermocoupleInfo
- Publication number
- JPH05167103A JPH05167103A JP3352169A JP35216991A JPH05167103A JP H05167103 A JPH05167103 A JP H05167103A JP 3352169 A JP3352169 A JP 3352169A JP 35216991 A JP35216991 A JP 35216991A JP H05167103 A JPH05167103 A JP H05167103A
- Authority
- JP
- Japan
- Prior art keywords
- thermocouples
- ceramics
- thermocouple
- electromotive force
- hardly occurs
- 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.)
- Pending
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ガラス繊維紡糸装置、
ガラス溶融装置、高温容器等に取り付けられる熱電対の
改良に関する。BACKGROUND OF THE INVENTION The present invention relates to a glass fiber spinning device,
The present invention relates to improvement of a thermocouple attached to a glass melting device, a high temperature container, or the like.
【０００２】[0002]
【従来の技術と課題】熱電対は、前記装置本体に溶接に
てとりつけられて装置の温度管理、制御に用いられてい
るが、通常２ケ月ぐらいの操業で熱電対が断線してしま
うという課題があった。またその交換に手間隙がかかり
煩雑で生産性を低下させていた。2. Description of the Related Art Thermocouples are attached to the main body of the apparatus by welding and are used for temperature control and control of the apparatus, but the problem is that the thermocouple breaks after about two months of operation. was there. In addition, it takes a lot of time to replace them, which is complicated and reduces productivity.
【０００３】これは、前記装置本体が 800〜1000℃の高
温中で使用されるので、熱電対の成分であるＰｔ及びＲ
ｈの揮発、Ｒｈの転移、拡散により起電力が低下する
他、線径が細くなりまた、高温中での使用されるので、
材料の結晶粗大化により脆化することから更に装置の温
度の加熱、冷却の繰り返しから材料の膨張収縮（ハンチ
ング）が重なり従って機械的強度が劣化し、断線に至る
ものであった。This is because the main body of the apparatus is used at a high temperature of 800 to 1000 ° C., so Pt and R which are the components of the thermocouple.
The electromotive force decreases due to the volatilization of h, the transfer and diffusion of Rh, and the wire diameter becomes thin and it is used at high temperature.
Since the material becomes brittle due to coarsening of the crystal, the expansion and contraction (hunting) of the material are repeated due to repeated heating and cooling of the temperature of the apparatus, resulting in deterioration of mechanical strength and disconnection.
【０００４】[0004]
【発明の目的】本発明は、上記課題を解決すべくなされ
たもので、高温中の使用においても起電力の低下のない
断線しにくい熱電対を提供するものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a thermocouple which does not cause a decrease in electromotive force even when it is used at a high temperature and is hard to break.
【０００５】[0005]
【発明の構成】上記課題を解決する為の本発明の熱電対
は、セラミックスがコーティングされてなることを特徴
とするものである。The thermocouple of the present invention for solving the above-mentioned problems is characterized by being coated with ceramics.
【０００６】[0006]
【作用】上記のように構成された本発明の熱電対によれ
ば、セラミックスがコーティングされてなるので、Ｐ
ｔ、Ｒｈの揮発がなく線径が細くなることがないので断
線がない。また、Ｒｈの転移、拡散が防止されるので、
起電力の低下がない。更に、セラミックスにより機械的
強度が補強されるものである。なお、コーティングの厚
みは0.03mm〜 0.5mmが好ましく0.03mm未満だとコーティ
ングの効果が少なく、また 0.5mmを超えると厚付けのコ
ーティング作業がたいへんとなり厚くしたことに見合う
効果も期待できないが特に限定するものではない。ま
た、コーティングの方法はハケ塗り等適宜公知の技術に
て行うものである。According to the thermocouple of the present invention constructed as described above, since it is coated with ceramics, P
Since t and Rh do not volatilize and the wire diameter does not become thin, there is no breakage. Moreover, since the transfer and diffusion of Rh are prevented,
No reduction in electromotive force. Furthermore, the mechanical strength is reinforced by ceramics. The thickness of the coating is preferably 0.03 mm to 0.5 mm, and if it is less than 0.03 mm, the effect of the coating is small, and if it exceeds 0.5 mm, the coating work of thickening becomes difficult and the effect commensurate with thickening can not be expected, but it is particularly limited. Not something to do. The coating method is a known technique such as brush coating.
【０００７】[0007]
【実施例】以下に実施例と従来例について述べる。ま
ず、実施例としてガラス繊維紡糸装置加熱部本体側面に
材質Ｐｔ及びＰｔＲｈ13％からなる外径0.75mmＲタイプ
熱電対を２セット溶接固定し、その後主成分Ａｌ2 Ｏ3
からなる東亜化学（株）製「アロン・セラミックス」を
ハケ塗りにて溶接部を含め塗布し、ドライヤーにて乾燥
し、更に 500℃にて焼成して厚さ70μｍのセラミックス
のコーティングされた熱電対とした。EXAMPLES Examples and conventional examples will be described below. First, as an example, two sets of 0.75 mm outer diameter R type thermocouples made of Pt and PtRh 13% were fixed by welding on the side surface of the heating unit main body of the glass fiber spinning device, and then the main component Al 2 O 3
Toa Kagaku Co., Ltd. "Aron ceramics" is applied by brush coating including the welded part, dried with a dryer, and further baked at 500 ° C to form a ceramics thermocouple with a thickness of 70 μm. And
【０００８】一方、従来例としてコーティングしない他
は実施例と同一にしてガラス繊維紡糸装置加熱部本体に
ＰＲ熱電対を２セット溶接固定した。然して実施例、従
来例の装置にて各々連続操業した結果、従来例において
は２ケ月で２セットとも断線したのに対し、実施例にお
いては７ケ月経っても断線することがなく、起電力の低
下もなかった。On the other hand, two sets of PR thermocouples were welded and fixed to the main body of the heating part of the glass fiber spinning device in the same manner as in the example except that no coating was performed as a conventional example. However, as a result of continuous operation by the apparatus of the example and the conventional example, both sets were disconnected in two months in the conventional example, whereas no disconnection occurred even after seven months in the example, and the electromotive force There was no decline.
【０００９】[0009]
【発明の効果】以上の結果から明らかなように、本発明
の熱電対によれば、セラミックスがコーティングされて
なるのでＰｔ、Ｒｈの揮発がなく、またＲｈの転移、拡
散が防止され更にセラミックスにより機械的強度が補強
されるので、高温中の使用においても起電力の低下のな
い断線しにくい熱電対が得られるという優れた効果を有
するものである。As is apparent from the above results, according to the thermocouple of the present invention, since the ceramics are coated, Pt and Rh are not volatilized, and the transfer and diffusion of Rh are prevented, and the ceramics are used. Since the mechanical strength is reinforced, it has an excellent effect that a thermocouple which does not cause a decrease in electromotive force and does not easily break even when used at high temperatures is obtained.
Claims (1)
ことを特徴とする熱電対。1. A thermocouple characterized by being coated with ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3352169A JPH05167103A (en) | 1991-12-13 | 1991-12-13 | Thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3352169A JPH05167103A (en) | 1991-12-13 | 1991-12-13 | Thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05167103A true JPH05167103A (en) | 1993-07-02 |
Family
ID=18422254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3352169A Pending JPH05167103A (en) | 1991-12-13 | 1991-12-13 | Thermocouple |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05167103A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015041315A1 (en) * | 2013-09-20 | 2015-03-26 | 株式会社フルヤ金属 | Thermocouple and manufacturing method for same |
-
1991
- 1991-12-13 JP JP3352169A patent/JPH05167103A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015041315A1 (en) * | 2013-09-20 | 2015-03-26 | 株式会社フルヤ金属 | Thermocouple and manufacturing method for same |
| JPWO2015041315A1 (en) * | 2013-09-20 | 2017-03-02 | 株式会社フルヤ金属 | Thermocouple and manufacturing method thereof |
| US10281337B2 (en) | 2013-09-20 | 2019-05-07 | Furuya Metal Co., Ltd. | Thermocouple and manufacturing method for same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3348929A (en) | Protecting carbon materials from oxidation | |
| JP3151778B2 (en) | Coated ceramic products | |
| JPH0613416B2 (en) | Clad precious metal bush | |
| JPH05167103A (en) | Thermocouple | |
| US3083445A (en) | Method of making an electrical resistance device | |
| JPH04269436A (en) | X-ray-tube anode | |
| JPH0220688A (en) | Fe-cr-ni-b-sic solder foil | |
| JPS61124534A (en) | Roll for heat treating furnace | |
| JPS63233289A (en) | Crucible for melting uranium | |
| JPH05299156A (en) | High-melting point metal heater and its manufacture | |
| JP4090767B2 (en) | Heat-generating material mainly composed of MoSi2 having a low oxygen diffusible glassy coating | |
| JPS6353249A (en) | Roller for heat-treatment furnace | |
| JP2769567B2 (en) | Joint of ceramic and metal | |
| KR100321402B1 (en) | Molybdenum silicide based heater which has the glassy surface layer with low oxygen diffusivity | |
| JP4034390B2 (en) | Protective film regeneration method for molybdenum disilicide heating elements | |
| JP3076888B2 (en) | 2 melting point heat-resistant sprayed material and heat-resistant member processed by thermal spraying | |
| JPH0790619A (en) | High temperature heat resistant member | |
| JPH05175555A (en) | Thermocouple | |
| JPS62202836A (en) | Heating furnace for optical fiber drawing | |
| JPS61213374A (en) | Jig | |
| JPH02129035A (en) | Mold for molding optical element | |
| JPS58120543A (en) | Production of metal coated fiber | |
| JPH0323072A (en) | Ferrule for stud welding | |
| JPH0350169A (en) | Formation of glass coating film | |
| JP2599442B2 (en) | Method for producing Pt / Mo clad wire |