JPH0213940B2 - - Google Patents
Info
- Publication number
- JPH0213940B2 JPH0213940B2 JP59025824A JP2582484A JPH0213940B2 JP H0213940 B2 JPH0213940 B2 JP H0213940B2 JP 59025824 A JP59025824 A JP 59025824A JP 2582484 A JP2582484 A JP 2582484A JP H0213940 B2 JPH0213940 B2 JP H0213940B2
- Authority
- JP
- Japan
- Prior art keywords
- nicrosil
- nisil
- thermocouple
- metal fitting
- temperature measuring
- 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
- 229910000829 Nisil Inorganic materials 0.000 claims description 16
- 229910000768 nicrosil Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 238000003466 welding Methods 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000002788 crimping Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910000809 Alumel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001179 chromel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
- G01K7/04—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples the object to be measured not forming one of the thermoelectric materials
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/81—Structural details of the junction
- H10N10/817—Structural details of the junction the junction being non-separable, e.g. being cemented, sintered or soldered
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Description
(1) 発明の分野
この発明は、高温における寿命の向上を図つた
熱電対に関するものである。
(2) 従来技術
従来からNiを主体としたＫ熱電対（クロメ
ル・アルメル）が知られているが、近年これの改
良として、Cr、Si、Mgを含み、耐熱性を向上さ
せたニクロシル・ニシル（nicrosil−nisil）熱電
対が開発された。その組成は次表の通りである。
(1) Field of the Invention The present invention relates to a thermocouple with improved lifespan at high temperatures. (2) Conventional technology K thermocouples (chromel/alumel), which mainly contain Ni, have been known for a long time, but in recent years, as improvements to these, nicrosil/nisil, which contains Cr, Si, and Mg and has improved heat resistance, has been known. (nicrosil-nisil) thermocouples were developed. Its composition is shown in the table below.
【表】
ニクロシル、ニシルの融点は共に1330℃以上で
あり、両者より構成される熱電対は1300℃以上の
測定が可能である。
ところが、第１図の従来例のように熱電対ニク
ロシル１、ニシル２の測温接点を溶接して構成す
る際、溶融部分３とニシル２の脚との境界に融点
の低い新たな合金層が形成される。例えば84％
Ni−13％Cr−３％Si等で、この場合の融点は約
1300℃となる。この合金層の為、ニクロシル・ニ
シル熱電対を1300℃で連続使用した場合、数十〜
数百時間で第２図のように、合金層付近が溶断し
てしまい、1300℃以上の雰囲気で長時間使用する
ことは困難であつた。
(3) 発明の目的
この発明の目的は、以上の点に鑑み、1300℃以
上の酸化雰囲気における耐熱寿命の向上を図つた
ニクロシル・ニシル熱電対を提供することであ
る。
(4) 発明の実施例
本願発明は、ニクロシル・ニシル熱電対の測温
接点部分にニシルの部材を溶接または圧着等で接
合したものである。
第３図は、この発明の一実施例を示す構成説明
図である。図において、１はニクロシル素線、２
はニシル素線、４１はニシルよりなる板状の小片
（部材）である。ニクロシル１と小片４１および
ニシル２と小片４１は軸方向に平行で長い溶接部
５１，５２によつて接続され、溶接部５１で測温
接点を形成している。
このように測温接点を形成すると合金層の境界
面積が大きくかつ小片４１はニシル２により保持
されているため、合金層が溶解しても分離断線は
生じ難い。
第４図は、他の実施例を示す。１はニクロシ
ル、２はニシルで、ニシルで製作した円筒状の金
具（部材）４２にニクロシル１を通し、金具４２
の上部および下部の溶接部５１で固定した後、ニ
シル２と金具４２を溶接部５２で溶接し、溶接部
５１で測温接点を形成したものである。この場
合、溶接部５１とニクロシル１は２箇所で強固に
接合しているため、溶接部５１と金具４２の境界
面にできた合金層が溶けても金具４２は一定位置
に保持され溶断し難い。金具４２にニクロシル１
を通した後、金具４２を外側から押しつぶし、金
具４２とニクロシル１を圧着しておいたり、ま
た、ニクロシル１と金具４２の接合面にネジを施
しておき、ネジ込んで止めておくとより強固な測
温接点が形成される。
第４図の場合、円筒４２をニシル２に通して溶
接するように構成しても第３図の場合と同様の理
由により、寿命の向上が図れる。
第５図に他の実施例を示す。第３図の小片４１
とし、ニシル素線を切断した小片（素線）４３を
用いている。
なお、部材４１，４２，４３のニクロシル１と
の溶接部５１は、軸方向に沿つて、全体の長さで
はなく、部分的な溶接でもよい。
(5) 発明の要約
以上述べたように、この発明は、ニクロシル・
ニシル熱電対両脚をニシルで製作した第３の小片
（部材）に溶接または圧着等により接合して測温
接点を形成した熱電対である。
(6) 発明の効果
1300℃以上の酸素雰囲気において、ニクロシ
ル・ニシル熱電対の耐熱寿命を向上することがで
きる。[Table] Both Nicrosil and Nisil have melting points of 1330°C or higher, and a thermocouple made of both can measure temperatures of 1300°C or higher. However, when constructing the temperature measuring junctions of the thermocouples NICROSIL 1 and NISCIL 2 by welding as in the conventional example shown in FIG. It is formed. For example 84%
Ni-13%Cr-3%Si etc., the melting point in this case is approx.
It becomes 1300℃. Because of this alloy layer, when Nicrosil/Nisil thermocouples are used continuously at 1300℃, tens of
After several hundred hours, as shown in Figure 2, the vicinity of the alloy layer melted, making it difficult to use it for a long time in an atmosphere of 1300°C or higher. (3) Purpose of the Invention In view of the above points, the purpose of the present invention is to provide a Nicrosil-Nisil thermocouple that has an improved heat-resistant life in an oxidizing atmosphere of 1300° C. or higher. (4) Embodiments of the Invention The present invention is one in which a Nisil member is joined to the temperature measuring contact portion of a Nicrosil/Nisil thermocouple by welding, crimping, or the like. FIG. 3 is a configuration explanatory diagram showing an embodiment of the present invention. In the figure, 1 is a nicrosyl wire, 2
is a Nisil wire, and 41 is a plate-shaped piece (member) made of Nisil. The NICROSIL 1 and the small piece 41 and the NICROSIL 2 and the small piece 41 are connected by long welding parts 51 and 52 parallel to the axial direction, and the welding part 51 forms a temperature measuring contact. When the temperature measuring contact is formed in this way, the boundary area of the alloy layer is large and the small piece 41 is held by the Nishiru 2, so even if the alloy layer melts, separation and disconnection are unlikely to occur. FIG. 4 shows another embodiment. 1 is Nicrosil, 2 is Nisil, and the Nicrosil 1 is passed through a cylindrical metal fitting (member) 42 made of Nisil, and the metal fitting 42 is
After fixing at the upper and lower welding parts 51, the Nishiru 2 and the metal fitting 42 are welded at the welding parts 52, and the welding parts 51 form temperature measuring contacts. In this case, since the welded part 51 and the NICROSIL 1 are firmly joined at two places, even if the alloy layer formed at the interface between the welded part 51 and the metal fitting 42 melts, the metal fitting 42 is held in a fixed position and is difficult to melt. . Nikrosil 1 on metal fittings 42
After passing through, crush the metal fitting 42 from the outside and press the metal fitting 42 and NICROSIL 1 together, or add a screw to the joint surface of NICROSIL 1 and the metal fitting 42 and tighten it to make it stronger. A temperature measuring junction is formed. In the case of FIG. 4, even if the cylinder 42 is welded through the cylinder 2, the service life can be improved for the same reason as in the case of FIG. FIG. 5 shows another embodiment. Piece 41 in Figure 3
A small piece (wire) 43 obtained by cutting a Nisil wire is used. Note that the welded portions 51 of the members 41, 42, and 43 with the NICROSIL 1 may be partially welded along the axial direction instead of the entire length. (5) Summary of the invention As stated above, this invention
This is a thermocouple in which both legs of the thermocouple are joined to a third piece (member) made of Nisil by welding or crimping to form a temperature measuring junction. (6) Effects of the invention In an oxygen atmosphere of 1300° C. or higher, the heat-resistant life of Nicrosil/Nisil thermocouples can be improved.
第１図、第２図は、従来例を示す構成説明図、
第３図、第４図、第５図は、この発明の一実施例
を示す構成説明図である。
１……ニクロシル、２……ニシル、４１，４
２，４３……部材。
1 and 2 are configuration explanatory diagrams showing a conventional example,
FIG. 3, FIG. 4, and FIG. 5 are configuration explanatory diagrams showing one embodiment of the present invention. 1...Nicrosil, 2...Nicil, 41,4
2,43...member.
Claims (1)
て、その測温接点部分にニシルよりなる部材を接
合したことを特徴とする熱電対。 ２ 前記部材として、板、円筒、また素線を用い
たことを特徴とする特許請求の範囲第１項記載の
熱電対。[Scope of Claims] 1. A thermocouple made of Nicrosil/Nisil, characterized in that a member made of Nisil is bonded to its temperature-measuring contact portion. 2. The thermocouple according to claim 1, wherein a plate, a cylinder, or a wire is used as the member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59025824A JPS60170271A (en) | 1984-02-14 | 1984-02-14 | Thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59025824A JPS60170271A (en) | 1984-02-14 | 1984-02-14 | Thermocouple |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60170271A JPS60170271A (en) | 1985-09-03 |
| JPH0213940B2 true JPH0213940B2 (en) | 1990-04-05 |
Family
ID=12176604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59025824A Granted JPS60170271A (en) | 1984-02-14 | 1984-02-14 | Thermocouple |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60170271A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60262377A (en) * | 1984-05-07 | 1985-12-25 | ニクロベル プロプライエタリー リミテッド | Stable high temperature cable and device formed therefrom |
-
1984
- 1984-02-14 JP JP59025824A patent/JPS60170271A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60170271A (en) | 1985-09-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |