JPS57119228A - Method of manufacturing protective tube for thermocouple - Google Patents
Method of manufacturing protective tube for thermocoupleInfo
- Publication number
- JPS57119228A JPS57119228A JP56005604A JP560481A JPS57119228A JP S57119228 A JPS57119228 A JP S57119228A JP 56005604 A JP56005604 A JP 56005604A JP 560481 A JP560481 A JP 560481A JP S57119228 A JPS57119228 A JP S57119228A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- thermocouple
- innermost
- high temperature
- exchanging
- 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
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
- G01K1/12—Protective devices, e.g. casings for preventing damage due to heat overloading
- G01K1/125—Protective devices, e.g. casings for preventing damage due to heat overloading for siderurgical use
-
- 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
- H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
- H10N10/17—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
PURPOSE:To eliminate a need of exchanging thermocouples immediately after exchange of a protective tube and to permit stable measurement of temperature for a long term by a method wherein a Ni.Cr alloy or so forming an innermost tube of a thermocouple protective tube for measuring high temperature is heat-treated in a range of high temperature lower than a melting point of the alloy thereby to prevent deterioration of thermocouples due to generation of metal vapor. CONSTITUTION:An innermost tube 3 of a thermocouple protective tube 5 for measuring temperature under conditions of high temperature and pressure in hot blast stoves or so is formed of a Ni.Cr aloy (Ni 80%, Cr 20%) and then heat-treated longer than about 50hr at temperature of 1,000-1,350 deg.C not exceeding a melting point of the alloy. A Pt.PtRh thermocouple 1 is coated with the three-layer protective tube 5 comprising an Al2O3 protective body tube 2, the innermost tube 3 and a non-treated outer tube 4 formed of the same material as the innermost tube 3. In such a manner, the thermocouple 1 is prevented from deteriorating due to metal vapor generated from the tube 3 at high temperature. Heretofore there has been a need of exchanging the thermocouple 1 several times for a short period of time after exchange of the innermost tube 3, but the use of the innermost tube 3 according to this invention eliminates the need of exchanging the thermocouple practically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56005604A JPS57119228A (en) | 1981-01-16 | 1981-01-16 | Method of manufacturing protective tube for thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56005604A JPS57119228A (en) | 1981-01-16 | 1981-01-16 | Method of manufacturing protective tube for thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57119228A true JPS57119228A (en) | 1982-07-24 |
Family
ID=11615813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56005604A Pending JPS57119228A (en) | 1981-01-16 | 1981-01-16 | Method of manufacturing protective tube for thermocouple |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57119228A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5456761A (en) * | 1993-07-15 | 1995-10-10 | Alcan International Limited | High temperature and abrasion resistant temperature measuring device |
| CN102721482A (en) * | 2012-07-04 | 2012-10-10 | 重庆材料研究所 | Temperature sensor with resistance against high temperature, high pressure and high humidity |
| US9702764B2 (en) | 2010-03-31 | 2017-07-11 | Cambridge Enterprise Limited | Thermocouple apparatus and method |
-
1981
- 1981-01-16 JP JP56005604A patent/JPS57119228A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5456761A (en) * | 1993-07-15 | 1995-10-10 | Alcan International Limited | High temperature and abrasion resistant temperature measuring device |
| US9702764B2 (en) | 2010-03-31 | 2017-07-11 | Cambridge Enterprise Limited | Thermocouple apparatus and method |
| US10168228B2 (en) | 2010-03-31 | 2019-01-01 | Cambridge Enterprise Limited | Thermocouple apparatus and method |
| CN102721482A (en) * | 2012-07-04 | 2012-10-10 | 重庆材料研究所 | Temperature sensor with resistance against high temperature, high pressure and high humidity |
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