CN2063228U - Thermocouple - Google Patents
Thermocouple Download PDFInfo
- Publication number
- CN2063228U CN2063228U CN 90202596 CN90202596U CN2063228U CN 2063228 U CN2063228 U CN 2063228U CN 90202596 CN90202596 CN 90202596 CN 90202596 U CN90202596 U CN 90202596U CN 2063228 U CN2063228 U CN 2063228U
- Authority
- CN
- China
- Prior art keywords
- thermode
- negative
- positive
- thermopair
- cross
- 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.)
- Withdrawn
Links
Images
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model relates to a thermocouple whose positive and negative electrodes are made of platinum-rhodium wires. The cross-section diameter of the positive electrode is the 0.7 to 0.8 time of the cross-section diameter of the negative electrode.
Description
The present invention relates to the thermometry field, relate in particular to thermopair.
The present invention can be used for thermoelectric pickup effectively, comprising being used in the thermoelectric pickup of metal associated media that disposable measurement melted and neutral medium temperature.
When the design sensor, especially based on the sensor of noble metal, the optimal selection in thermode cross section is significant.
Known thermopair (
KypuTHblK,
C.bypxaHOB, E.
CTa
Hblk, " MaTepna
Bl BblcokoTeMnepaTypHo
TepMoMeTpnn ", " MeTannyp
" Moscow) 1986 years the 17th～26 page) comprise that the lead as positive and negative thermode, its diameter are 0.1～1 millimeter, by the alloy composition of platinum (Pt) or platinum and rhodium (Ph), for example: Pt; Pt+6%Rh; Pt+10%Rh; Pt+13%Rh; Pt+20%Rh; Pt+30%Rh; Pt+40%Rh.
Wire producing thermode with same diameter will cause noble metal consumption increase, thermopair inertia to increase and discern the complexity of positive and negative thermode method.
Known another kind of thermopair (RO, A, 79369), its negative thermal electrode is made with platinum, and hot electrode is made with platinum-rhodium alloy Pt+10%Rh, and the hot junction part of thermode is to be that 0.5 millimeter round conductor is made by same diameter, and in cold alloy part, the cross section of two thermodes all is foursquare, and the length of side is 0.35 millimeter, thereby has saved some noble metals.
Yet this thermopair is very complicated on making, because need use supplementary equipment therefore for the thermode that obtains square sectional.In addition, in order under various conditions of work, to use this known thermopair, the each length ratio relation that all must select round section and square-section part.
Task of the present invention is to make such thermopair, and the version of its thermode can be matched the optimal proportion relation of thermode xsect.
Being proposed of task is to solve like this: this thermopair contains the positive and negative thermode of being made by Pt-Rh wire, and according to the present invention, the diameter of hot electrode xsect is selected by following formula:
D
p＝（0.7～0.8）D
n
D in the formula
pAnd D
nIt is respectively the diameter of positive and negative thermode xsect.
One of making in two thermodes of the present invention can save 50% metal, thereby reduces the inertia of thermopair and simplify the recognition methods of positive and negative thermode.
Accompanying drawing illustrates thermopair synoptic diagram of the present invention.
Thermocouple of the present invention comprises the positive and negative thermode made from Pt-Rh wire, and its composition is: Pt; Pt+6%Rh; Pt+10%Rh; Pt+20%Rh; Pt+30%Rh; Pt+40%Rh; Etc.. And hot electrode always contains more rhodium than negative thermal electrode, and thinner, and its diameter is about 0.7～0.8 times of negative thermal electrode. For example, at the diameter D of the negative thermal electrode made from Pt or Pt+6%Rh silknWhen equaling 0.1,0.3,0.5 millimeter, first kind of situation of hot electrode is to make with alloy Pt+10%Rh or Pt+13%Rh, the second situation is to make with alloy Pt+30%Rh, the diameter that make used B alloy wire this moment is respectively 0.07,0.21 and 0.4 millimeter, that is (0.7～0.8) Dn.
This proportionate relationship is to determine according to equal strength and the stable condition thereof of thermode in the scope of application. Work as DpDuring＜0.7Dn, same strength is destroyed, and causes the additional unstability of thermode.
Thermocouple is worked as follows, and the diameter of positive electrode cross section is 0.7～0.8 times of negative electrode cross-sectional diameter, and an end of positive and negative electrode is connected into the working end. This working end is placed on the measuring object, for example is placed in electric arc furnaces or the Martin furnace, in the liquid metal district. The free end of thermode is received on the measuring instrument by means of compensating wire (or directly).
In view of the proportionate relationship of advising of thermode cross-sectional diameter, can keep strength characteristics and the stability thereof of thermocouple, (reach 50%) significantly simultaneously and saved noble metal, reduced inertia, simplified the identification of thermode.
Claims (1)
1, thermopair, it comprises the positive and negative thermode of making of Pt-Rh wire, it is characterized in that: the cross-sectional diameter of hot electrode is selected by following formula:
D
p=(0.7～0.8)D
n
D in the formula
pAnd D
nIt is respectively the cross-sectional diameter of positive and negative thermode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90202596 CN2063228U (en) | 1990-03-09 | 1990-03-09 | Thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90202596 CN2063228U (en) | 1990-03-09 | 1990-03-09 | Thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2063228U true CN2063228U (en) | 1990-10-03 |
Family
ID=4883964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90202596 Withdrawn CN2063228U (en) | 1990-03-09 | 1990-03-09 | Thermocouple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2063228U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111492214A (en) * | 2017-12-21 | 2020-08-04 | Avl李斯特有限公司 | Thermocouple, temperature measuring system and thermocouple manufacturing method |
-
1990
- 1990-03-09 CN CN 90202596 patent/CN2063228U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111492214A (en) * | 2017-12-21 | 2020-08-04 | Avl李斯特有限公司 | Thermocouple, temperature measuring system and thermocouple manufacturing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3607084A (en) | Combustible gas measurement | |
| EP0329323A3 (en) | Thermocouples | |
| CA1154610A (en) | Thermocouple apparatus for indicating liquid level in a container | |
| GB2202083A (en) | Thermocouples | |
| CN2063228U (en) | Thermocouple | |
| US3159460A (en) | Composite material | |
| US4479868A (en) | Gas measuring probe | |
| JP6545627B2 (en) | Temperature sensor | |
| CN85102991A (en) | high-temperature thermistor with high reproducibility | |
| DE4223432A1 (en) | Gas sensor for use in IC engine exhaust gas analysers - has a thermoelement as a temp. probe on a common carrier substrate | |
| CN1101600C (en) | Temp sensor (F element) with analog, binary and frequency outputs | |
| US4698454A (en) | Lightweight thermocouple assembly | |
| DE272448C (en) | ||
| FR2656923A3 (en) | Thermocouple | |
| US3901734A (en) | Thermocouple | |
| US6020551A (en) | Multi-wire self-diagnostic thermocouple | |
| JP3129673B2 (en) | Thermocouple calibration furnace and thermocouple calibration method | |
| US2588998A (en) | Thermocouple | |
| JPS5533671A (en) | Lead wire for temperature measuring resistor | |
| JPH01233331A (en) | Sheathed thermocouple | |
| CN111289565B (en) | Method and device for nondestructive testing of quality of conductive material based on continuously acquired information | |
| SU1200143A1 (en) | Compensation wire for thermocouple | |
| CN2281534Y (en) | Chemically sensing hydrogen determining instrument | |
| JPH04130046U (en) | thermocouple | |
| Itsushiki | Highly sensitive contact combustion type carbon monoxide gas sensor using ultrafine Pd-Fe filament |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |