JPS5958882A - Thermocouple - Google Patents
ThermocoupleInfo
- Publication number
- JPS5958882A JPS5958882A JP57168577A JP16857782A JPS5958882A JP S5958882 A JPS5958882 A JP S5958882A JP 57168577 A JP57168577 A JP 57168577A JP 16857782 A JP16857782 A JP 16857782A JP S5958882 A JPS5958882 A JP S5958882A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- thermocouple
- thickness
- wire
- coefficient
- 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
- 239000011521 glass Substances 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 abstract description 4
- 229910000809 Alumel Inorganic materials 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract description 3
- 229910001179 chromel Inorganic materials 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 230000008094 contradictory effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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′電対に関する。[Detailed description of the invention] [Technical field of invention] The present invention relates to thermocouples.
一般的に従来使用されている熱電対は測定雰囲気に直接
露呈される構造を採用しているものが多いが、熱・電対
が裸の才ま測定雰囲気にさらされると、熱電対の酸化に
より寿命が短くなる。熱電対は温度検出の検出端部だけ
でなく、これ以外の部分でも、比較的高い温度になるた
め、これらの部分で劣化が起こりやすく、その防止が望
まれている１゜
〔発明の目的〕
本発明は温度検出端部以外の素線部でも（１） 比較
的良好な耐熱性を有し、かつ（２） 耐酸化性を有す
る
熱電対を提供することを目的とする。Many of the conventionally used thermocouples have a structure that allows them to be exposed directly to the measurement atmosphere, but if the thermocouple is exposed to the measurement atmosphere, the thermocouple will oxidize. Life expectancy will be shortened. Thermocouples have relatively high temperatures not only at the detection end for temperature detection but also at other parts, so deterioration is likely to occur in these parts, and it is desired to prevent this.1゜[Objective of the Invention] An object of the present invention is to provide a thermocouple that has (1) relatively good heat resistance and (2) oxidation resistance even in wire portions other than the temperature detection end.
本発明に係る熱電対は素線部を熱膨張係数が約５．ＯＸ
ｌ ０−６／ｄ＝ｙ 〜４０．Ｘ１０−６／ｄｓ、ｔｙ
の範囲にあるガラスで被覆することにより、前記の目的
を達成することができる。In the thermocouple according to the present invention, the wire portion has a thermal expansion coefficient of about 5. OX
l 0-6/d=y ~40. X10-6/ds, ty
The above object can be achieved by coating with a glass in the range of .
熱電対の素線部の耐酸化性を改善する為に本発明ではガ
ラスで素線部を被覆する。これにより耐酸化性は飛躍的
に向上する。父、素線部の被覆には加工が答易なガラス
が、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する。In order to improve the oxidation resistance of the wire portion of the thermocouple, the wire portion is coated with glass in the present invention. This dramatically improves oxidation resistance. However, glass, which is easy to process, is suitable for covering the strands. However, depending on the glass, the heat resistance may be insufficient.
そこで耐熱性をも兼ね備える為にガラスを調べた７、そ
の結果、５．０ＸＩＯ６／ｄｅｙ 〜４０ＸＩＱ−６／
ｄｅｙ の範囲の熱膨張係数を有するガラスを用いるこ
とにより、前記の要求を満たずことが分った。Therefore, we investigated glass in order to have heat resistance as well7, and the result was 5.0XIO6/dey ~ 40XIQ-6/
It has been found that the above requirements are not met by using a glass having a coefficient of thermal expansion in the range dey.
これば、ガラスの熱膨張係数が約５．ＯＸ］Ｏ−６／ｄ
ｅｇ〜約４０Ｘ１０−６／ｄｇｙ の範囲に有ると、
比較的金属の係数に近似し、熱衝撃によるガラス層の剥
離が生じに＜＜、耐熱性の改善が図れる為である。In this case, the coefficient of thermal expansion of the glass is approximately 5. OX]O-6/d
If it is in the range of eg to about 40X10-6/dgy,
This is because the coefficient is relatively close to that of metal, and the glass layer does not peel off due to thermal shock, and the heat resistance can be improved.
この種のガラスとしては、例えはソーダガラス、ホウ酸
アルミナガラス、石英カラス、結晶化ガラス等がある。Examples of this type of glass include soda glass, boric alumina glass, quartz glass, and crystallized glass.
熱電対の温度検出部以外の素線部では、耐熱性及び耐酸
性が兼ねそなえられていれば、十分であるが、温度検出
端部では、更に速い熱応答性を求められる場合もある。Although it is sufficient for the wire portions of the thermocouple other than the temperature detection portion to have both heat resistance and acid resistance, even faster thermal response may be required at the temperature detection end portion.
そこで熱伝導性を向上す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 for improving 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、熱伝導性を向上させ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ずこと
が分った。In the present invention, as a result of studying these conflicting demands, it was found that these demands could not be met by adjusting the thickness of the glass.
すなわち、被覆するガラスの厚さを約０．０１朋〜２
ｍｍの範囲、好ましくは約Ｑ、 ｌ ｍｔｎ〜１、Ｏｍ
ｍ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。That is, the thickness of the glass to be coated is approximately 0.01 to 2.
in the range of mm, preferably about Q, l mtn~1, Om
It has been found that both characteristics can be achieved by using a range of m.
更に被覆ガラス？こついて述べると、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、被憬作業中、熱電対を酸化させやすい事による。More coated glass? To be specific, it is desirable that the coated glass resist oxidation of the thermocouple during the coating process. This is because the thermocouple is easily oxidized during the work.
熱電対を酸化させにくいガラスとしては、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
で融着可能であり、更にこの温度よりかなり高温の軟化
点まで固化状態を保つ。したがって、比較的低温で被覆
作業ができ、熱電対を酸化させにくい。又、結晶化ガラ
スは８５００ｋｇ／−〜１２０００１ｃｇ ／ ７１Ｉ
ｉ程度の弾性係数を有し、機械的強度に潰れる為、薄く
しやすく、熱応答性の改善に役立つ。結晶化カラスの組
成例の一部を第１表に示す。Examples of glasses that do not easily oxidize thermocouples include crystallized glass. Crystallized glass can be fused at relatively low crystallization temperatures and remains solid up to its softening point, which is significantly higher than this temperature. Therefore, the coating can be performed at a relatively low temperature, and the thermocouple is less likely to be oxidized. Also, crystallized glass is 8500kg/-~120001cg/71I
It has an elastic modulus of about i and is crushed by mechanical strength, so it can be easily made thin and helps improve thermal response. Table 1 shows some composition examples of crystallized glass.
第１表 結晶化ガラスの組成例
第１表に示されている組成を用いる場合、酸化亜鉛（Ｚ
ｒＬＯ）が結晶の核となり、結晶化ガラスが形成される
。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℃〜８５０℃の範囲で変えることがで
きる。Table 1 Composition Examples of Crystallized Glass When using the composition shown in Table 1, zinc oxide (Z
rLO) becomes a crystal nucleus, and crystallized glass is formed. The crystallization temperature can be varied within the range of about 300°C to 850°C by changing the composition of the ingredients.
〔発明の実施例１ 実施例１ 本発明の熱′１対の一実施例を図面を用いて説明する。[Embodiment 1 of the invention Example 1 An embodiment of the thermal pair 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を接合した熱電対の素線部
３を、熱膨張係数が約９０×１０−６／ｄａｙ で、結
晶化温度が約６２０ ℃で軟化点が約９６０℃の結晶化
ガラス４で被覆する。その際、熱電対はほとんど酸化さ
れなかった。The wire part 3 of the thermocouple, which is made by joining the alumel wire 1 and the chromel wire 2, is crystallized with a thermal expansion coefficient of about 90 x 10-6/day, a crystallization temperature of about 620 °C, and a softening point of about 960 °C. Cover with glass 4. At that time, the thermocouple was hardly oxidized.
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、ガラス被覆された素線部で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 0.degree. C., it was found that the glass-coated wire portion had good heat resistance and oxidation resistance.
実施例２
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 2 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を接合した熱電対の素線部
３に熱膨張係数が約９０Ｘ］０−’／ ｄｅｙで、軟化
点が約９６０℃の結晶化ガラスを厚さ約０．９朋に被覆
する。The wire part 3 of the thermocouple, which is made by joining the alumel wire 1 and the chromel wire 2, is made of crystallized glass having a thermal expansion coefficient of about 90X]0-'/dey and a softening point of about 960°C, with a thickness of about 0.9 mm. coated with
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ガラス被覆された素線部
で良好であることがわかった。虹に熱応答性は常温から
沸騰している水の中にこの熱電対を入れ、電位差計で１
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, a test similar to that in Example 1 was conducted, and it was found that the glass-coated wire portion had good heat resistance and oxidation resistance. The thermoresponsiveness of the rainbow is determined by placing this thermocouple in water that is at room temperature to boiling, and measuring 1 with a potentiometer.
Measure the pressure and find 90% of the temperature difference between room temperature and boiling water.
This was determined by measuring the time it takes for the voltage to change to the equivalent of . As a result, the thermal response was relatively good.
本発明の熱電対は、素線部を、熱膨張係数が５．０Ｘ１
０−６／ｄす〜４０Ｘ１０−６／ｄａｙの範囲にあるガ
ラスで被覆することにより、比較的良好な耐酸化性及び
耐熱性を有することができる。The thermocouple of the present invention has a wire portion with a thermal expansion coefficient of 5.0X1
Relatively good oxidation resistance and heat resistance can be achieved by coating with glass in the range of 0-6/day to 40×10-6/day.
図面は本発明の熱電対の一実施例を示す断面図である。 ３・・・・・素線部 ４・・・・・ガラス The drawing is a sectional view showing an embodiment of the thermocouple of the present invention. 3...Element wire part 4...Glass
Claims (1)
Ｉ Ｏ−’／ｄｅ、ｑの範囲の熱膨張係数を有するガラ
スで被検された熱電対。 ２、 被覆するガラスの厚さが０．０１皿〜２朋の範囲
にある特許請求の範囲第１項に記載の熱電対。 ３、 被覆するガラスの厚さがＱ、 ］ ｍｒｎ〜１．
０開の範囲にある特許請求の範囲第１項に記載の熱電対
５ ４、 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. The strand portion is 5. OXl 0-6/del ~40X
A thermocouple tested in glass with a coefficient of thermal expansion in the range I O-'/de,q. 2. The thermocouple according to claim 1, wherein the thickness of the coated glass is in the range of 0.01 mm to 2 mm. 3. The thickness of the glass to be coated is Q, ] mrn~1.
Thermocouple 54 according to claim 1 in the range of 0 open, Claim 1 in which the glass is crystallized glass
Thermocouple according to items 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57168577A JPS5958882A (en) | 1982-09-29 | 1982-09-29 | Thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57168577A JPS5958882A (en) | 1982-09-29 | 1982-09-29 | Thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5958882A true JPS5958882A (en) | 1984-04-04 |
Family
ID=15870624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57168577A Pending JPS5958882A (en) | 1982-09-29 | 1982-09-29 | Thermocouple |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5958882A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008145244A (en) * | 2006-12-08 | 2008-06-26 | Sukegawa Electric Co Ltd | Thermocouple |
| JP2017050325A (en) * | 2015-08-31 | 2017-03-09 | 学校法人東京理科大学 | Thermoelectric transducer and manufacturing method therefor |
| KR20240050441A (en) | 2021-10-21 | 2024-04-18 | 가부시키가이샤 후루야긴조쿠 | thermocouple structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4965880A (en) * | 1972-10-24 | 1974-06-26 | ||
| JPS572584A (en) * | 1980-06-06 | 1982-01-07 | Tdk Corp | Thermoelectric element and manufacture thereof |
-
1982
- 1982-09-29 JP JP57168577A patent/JPS5958882A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4965880A (en) * | 1972-10-24 | 1974-06-26 | ||
| JPS572584A (en) * | 1980-06-06 | 1982-01-07 | Tdk Corp | Thermoelectric element and manufacture thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008145244A (en) * | 2006-12-08 | 2008-06-26 | Sukegawa Electric Co Ltd | Thermocouple |
| JP2017050325A (en) * | 2015-08-31 | 2017-03-09 | 学校法人東京理科大学 | Thermoelectric transducer and manufacturing method therefor |
| KR20240050441A (en) | 2021-10-21 | 2024-04-18 | 가부시키가이샤 후루야긴조쿠 | thermocouple structure |
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