JPS5958883A - Thermocouple - Google Patents
ThermocoupleInfo
- Publication number
- JPS5958883A JPS5958883A JP57168578A JP16857882A JPS5958883A JP S5958883 A JPS5958883 A JP S5958883A JP 57168578 A JP57168578 A JP 57168578A JP 16857882 A JP16857882 A JP 16857882A JP S5958883 A JPS5958883 A JP S5958883A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- thermocouple
- thickness
- heat resistance
- coated
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は熱電対に係り、特に温度検出端部の改良に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to thermocouples, and more particularly to improvements in temperature sensing ends.
一般に使用されている熱電対ば、その温度検出部を測定
雰囲気に直接露呈される構造を採用しているものが多い
。この棟の熱′電対では測定雰囲気の状態に起因して、
温度検出端部が酸化され、起電力の変化及び接合部の破
壊を生じる恐れがある。Many commonly used thermocouples have a structure in which their temperature detection portion is directly exposed to the measurement atmosphere. Due to the condition of the measurement atmosphere, the thermocouples in this building
The temperature sensing end may be oxidized, causing a change in electromotive force and destruction of the junction.
そこで本発明者らは温度検出部をガラスで被覆すること
によりこの問題を解決することを考えた。しかし、この
種の熱電対では、高温領域での使用や急激な温度変化中
での使用に耐えられない場合があり、これを更に解決す
ることが望まれた。The inventors of the present invention therefore considered solving this problem by covering the temperature detection section with glass. However, this type of thermocouple may not be able to withstand use in high-temperature regions or during rapid temperature changes, and it has been desired to further solve this problem.
本発明の熱電対は、高温領域や急激な温度変化中での使
用を目的とし、
（１１耐熱性が比較的良好でかつ
（２） 耐酸化性を有する
熱電対を提供することにある。The purpose of the thermocouple of the present invention is to provide a thermocouple that is intended to be used in a high temperature region or during rapid temperature changes, and has (11) relatively good heat resistance and (2) oxidation resistance.
本発明に係る熱電対は、検出端部を、熱膨張係数が、５
．０Ｘ１０−６７”７〜４０ＸｌＯ−６／ｄｅｇの範囲
にあり、軟化点が、６００℃以上であるガラスで被覆す
ることによりなされているものである９
検出ｙ、！、！部の耐酸化性を改善する為に本発明では
ガラスで検出端部を被覆する。これにより耐酸化性は飛
躍的に向上する。又、検出端部は比リタ的伏雑な形状を
している為、加工が容易なガラスは、その被覆に適して
いる。しかし、ガラスによっては耐熱性の点で不十分と
なる場合を生ずる。The thermocouple according to the present invention has a detection end with a coefficient of thermal expansion of 5.
．． 0X10-67" is in the range of 7 to 40XlO-6/deg, and the softening point is 600°C or higher. In order to improve this, in the present invention, the detection end is covered with glass.This dramatically improves the oxidation resistance.Also, the detection end has a relatively rough shape, so it is easy to process. Glass is suitable for the coating.However, depending on the glass, there may be cases where the heat resistance is insufficient.
そこで耐熱性をも兼ね備える為にガラスを調べた。その
結果、５．ＯＸ］Ｏ−６／ｄす〜４０×ＪＱ−６／ｄＣ
ｇ の範囲の熱膨張係数を有し、６００℃以上の軟化点
を有するガラスを用いることにより、前記の要求を満た
すことが分った。Therefore, we investigated glass that also has heat resistance. As a result, 5. OX] O-6/dsu~40×JQ-6/dC
It has been found that the above requirements can be met by using a glass having a coefficient of thermal expansion in the range of g and a softening point above 600°C.
これは、カラスの熱膨張係数が約５．０Ｘ１０−６／ｄ
ｅｎ〜約４０Ｘ］０ ’／ｄｅｇ Ｏ範囲ＩＣ有６
と、比較的金属の係数に近似し、熱歯撃によるガラス層
の剥離が生じにくく、耐熱性の改善が図れる為であり、
又、ガラスの最高使用温度は軟化点で決りこの温度以下
で使用されるがガラスの軟化点が約・６００℃以上であ
ると、その使用領域が板ガラスより高温側へ拡大され、
耐熱性の改善が図れる為である。This means that the coefficient of thermal expansion of glass is approximately 5.0X10-6/d
en ~ approx. 40X] 0'/deg O range with IC 6
This is because the coefficient is relatively similar to that of metal, and the glass layer is less likely to peel off due to thermal toothing, improving heat resistance.
In addition, the maximum operating temperature of glass is determined by its softening point, and it is used below this temperature, but if the softening point of glass is about 600°C or higher, its range of use will be expanded to higher temperatures than flat glass.
This is because heat resistance can be improved.
この種のガラスとしては、例えば石英ガラス結晶化ガラ
ス等がある。Examples of this type of glass include quartz glass and the like.
以上、耐熱性及び耐酸化性を兼ねそなえる熱電対につい
て述べたが、更に速い熱応答性を求められる場合もある
。Although the thermocouples that have both heat resistance and oxidation resistance have been described above, there are cases where even faster thermal response is required.
そこで熱伝導性をも兼ね備える方法として次の方法が考
えられる。Therefore, the following method can be considered as a method that also has thermal conductivity.
それは、被覆ガラスの厚さを薄くすることである。その
ことにより、熱伝導性を向上さぜることが可能である。The goal is to reduce the thickness of the coated glass. Thereby, it is possible to improve thermal conductivity.
しかし、あまり薄すぎると、機械的強度が低下し、ガラ
スが破壊してしまう。However, if it is too thin, the mechanical strength will decrease and the glass will break.
本発明では、これらの相反する要求について検討の結果
、ガラスの厚さの調整によりこれらの要求を満たすこと
が分った。In the present invention, as a result of studying these conflicting demands, it was found that these demands can be met by adjusting the thickness of the glass.
ずなわぢ、被覆するガラスの厚さを約０，０１韻〜２間
の範囲、好ましくは約０．１ ｍｍ〜１．０ｍｍの範囲
にすると、両方の特性がかねそなえられることがわかっ
た。It has been found that both properties can be achieved by coating the glass with a thickness in the range between about 0.01 mm and 2 mm, preferably between about 0.1 mm and 1.0 mm.
更に被覆ガラスについて述べると、被覆ガラスは、被覆
作業中に熱電対を酸化させにくい方が望ましい。これは
、本発明では、比較的高い軟化Ｔｌ１Ａ度を有するガラ
スが用いられる為被覆作業中、熱電対を特に酸化させや
すい事による、
熱電対を酸化させにくいガラスとしてｔま、例えば結晶
化ガラスがある。結晶化ガラスは、比較的低温の結晶温
度で融着可能であるが、この温度よりかなり高温の軟化
黒味で固化状態を保つ。したがって、比較的低温で被覆
作業ができ、熱′区対が酸化されにくい。又、結晶ｆヒ
カラスは８５００に９／１ｒｎ１〜１２０００／ｃｇ／
−程度の弾性係数を有し、機械的強度に後れる為、薄く
しやすく熱応答性の改善に役立つ。結晶化ガラスの組成
例９一部を表１表に示す。Furthermore, regarding the coated glass, it is desirable that the coated glass resist oxidation of the thermocouple during the coating operation. This is because in the present invention, glass having a relatively high degree of softening Tl1A is used, which makes the thermocouple particularly susceptible to oxidation during the coating process. be. Crystallized glass can be fused at a relatively low crystallization temperature, but remains solidified with a softened black color at a temperature considerably higher than this temperature. Therefore, the coating operation can be carried out at a relatively low temperature, and the heat exchanger is less likely to be oxidized. Also, crystal f Hikarasu is 8500 to 9/1rn1~12000/cg/
It has an elastic modulus of -, which lags behind its mechanical strength, so it is easy to make thin and helps improve thermal response. A part of Composition Example 9 of crystallized glass is shown in Table 1.
第１表 結晶化ガラスの組成例
ラスが形成される。そして、その結晶化温度は、成分の
組成を変えることにより、約３００′Ｃ〜８５０℃の範
囲で変えることができる。Table 1 Composition Examples of Crystallized Glass Glass is formed. The crystallization temperature can be varied within the range of about 300'C to 850C by changing the composition of the ingredients.
実施例１
本発明のＢ ’ｒｆ（対の一実施例を図面を用いて説明
する。Example 1 An example of the B'rf pair of the present invention will be described with reference to the drawings.
一γルメル線１にクロメル線２を接合した検出端部３を
、熱膨張係数が約９０ ＸＩ Ｏ−６／ｄ、ｅｇで、結
晶化温度が約６２０℃で、軟化点が約９６０℃の結晶化
ガラス４で被覆した。The detection end 3, which is made by joining the chromel wire 2 to the 1gamma lumel wire 1, has a thermal expansion coefficient of about 90 XI O-6/d, eg, a crystallization temperature of about 620°C, and a softening point of about 960°C. It was coated with crystallized glass 4.
その際、熱′電対はほとんど１俊化されなかった。At that time, thermocouples were hardly reduced to 1.
この熱電対を用いて、大気雰囲気で、室温から約８５０
℃の温度範囲で耐酸化試験及び急冷試験を行なったとこ
ろ、耐熱性及び耐酸化性が良好であることがわかった。Using this thermocouple, approximately 850
When an oxidation resistance test and a quenching test were conducted in the temperature range of °C, it was found that the heat resistance and oxidation resistance were good.
実施例
本発明の熱′電対の他の一実施例を図面を用いて説明す
る。Embodiment Another embodiment of the thermocouple of the present invention will be described with reference to the drawings.
アルメル線１にクロメル線２を接合した検出、７；Ａｔ
部３を、熱膨張係数が約９０Ｘ１０−’／ｃｔｅｇで、
軟化点が約９６０℃の結晶化ガラスを厚さ約０．９ ｍ
ｍに被覆した。Detection of joining chromel wire 2 to alumel wire 1, 7; At
Part 3 has a coefficient of thermal expansion of about 90×10-'/cteg,
Crystallized glass with a softening point of approximately 960°C is approximately 0.9 m thick.
coated on m.
この熱電対を用いて、実施例１と同様な試験を行なった
ところ、耐熱性及び耐酸化性が良好であることがわかっ
た。更に熱応答性は常温から沸騰している水の中に熱電
対を入れ電位差計で電圧を測定し、常温と沸騰している
水との温度差の９０％に相当する電圧に変化するまでの
時間を計ることによって調べられた。その結果、熱応答
性は比較的良好であった。Using this thermocouple, the same test as in Example 1 was conducted, and it was found that the thermocouple had good heat resistance and oxidation resistance. Furthermore, the thermal response is measured by placing a thermocouple into boiling water from room temperature and measuring the voltage with a potentiometer. This was determined by measuring time. As a result, the thermal response was relatively good.
本発明の熱電対は、検出端部を、熱膨張係数が５．ＯＸ
］ ０−６／ｄｇｇ 〜４０ＸＩ Ｏ−６／ｄｅ、ｑ
Ｏ範囲にあり、軟化点が６００℃以上であるカラスで被
覆することにより、比較的高温で良好な耐酸化性及び耐
熱性を有する。The thermocouple of the present invention has a detection end having a thermal expansion coefficient of 5. OX
] 0-6/dgg ~40XI O-6/de, q
By coating with glass having a softening point of 600° C. or higher, it has good oxidation resistance and heat resistance at relatively high temperatures.
図面は本発明のｐｐ；電対の一実施例を示す断面図であ
る。
３・・・検出端部
４・ガラスThe drawing is a sectional view showing an embodiment of the pp couple of the present invention. 3...Detection end 4/Glass
Claims (1)
”／ｄｅｇの範囲の熱膨張係数を有し、６００℃以上の
軟化点を有するガラスで被覆された検出端部を具備して
なる熱電対、。 ２、被キＡするガラスの厚さが０．０１ ｍｒｎ〜２朋
の範囲にある特許請求の範囲ｇ １項に記載の熱電対５ ３ 被覆するカラスの厚さが０．１韻〜１．０北の範囲
にある特許請求の範囲第１項に記載の熱′１０１対。 ４、被覆するカラスが結晶化ガラスである特許請求の範
囲第１項乃至第３項に記載の熱゛電対[Claims] 1, 5. OXl 0-6/day ~40X10
A thermocouple comprising a sensing end coated with glass having a coefficient of thermal expansion in the range of "/deg and a softening point of 600° C. or higher. 2. The thickness of the glass to be coated is 0. Thermocouple 5 according to claim 1 Claim 1 in which the thickness of the covering glass is in the range of 0.1 mrn to 1.0 mrn 4. The thermocouple according to Claims 1 to 3, wherein the covering glass is crystallized glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57168578A JPS5958883A (en) | 1982-09-29 | 1982-09-29 | Thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57168578A JPS5958883A (en) | 1982-09-29 | 1982-09-29 | Thermocouple |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5958883A true JPS5958883A (en) | 1984-04-04 |
| JPH059949B2 JPH059949B2 (en) | 1993-02-08 |
Family
ID=15870643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57168578A Granted JPS5958883A (en) | 1982-09-29 | 1982-09-29 | Thermocouple |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5958883A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340465A (en) * | 2021-04-29 | 2021-09-03 | 慧石（上海）测控科技有限公司 | Quick response temperature sensing probe and temperature sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS572584A (en) * | 1980-06-06 | 1982-01-07 | Tdk Corp | Thermoelectric element and manufacture thereof |
-
1982
- 1982-09-29 JP JP57168578A patent/JPS5958883A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS572584A (en) * | 1980-06-06 | 1982-01-07 | Tdk Corp | Thermoelectric element and manufacture thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340465A (en) * | 2021-04-29 | 2021-09-03 | 慧石（上海）测控科技有限公司 | Quick response temperature sensing probe and temperature sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH059949B2 (en) | 1993-02-08 |
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