CN2684173Y - Double-layer protected thermocouple - Google Patents
Double-layer protected thermocouple Download PDFInfo
- Publication number
- CN2684173Y CN2684173Y CNU2004200431305U CN200420043130U CN2684173Y CN 2684173 Y CN2684173 Y CN 2684173Y CN U2004200431305 U CNU2004200431305 U CN U2004200431305U CN 200420043130 U CN200420043130 U CN 200420043130U CN 2684173 Y CN2684173 Y CN 2684173Y
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- Prior art keywords
- layer
- model
- utility
- double
- thermopair
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- 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 - Fee Related
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model relates to a double-layer protected thermocouple. A thermoelectric electrode sheathed with an insulating tube is mounted in a protecting tube and connected with a connection box. The utility model is characterized in that the first layer of the protecting tube is an oxidizing layer, and the second layer is a nitridizing layer. The utility model has the advantages of high sensibility, long service life which can reach more than 2500 hours, fast response speed, and anti-contamination of the solution, and is mainly used for measuring and controlling the temperature of the metals of aluminum, magnesium, and zinc, or the fluid of aluminum alloy, magnesium alloy, and zinc alloy.
Description
Technical field
The utility model relates to a kind of thermopair, especially a kind of thermopair of double shielding.
Background technology
In aluminium, magnesium, zinc metal and the alloy production process; the measurement of temperature and control can reduce scaling loss; guarantee the quality of product; measurement and control instrument commonly used are thermopair; its protection tube is made with the 1Cr18Ni9Ti material; when the observing and controlling temperature, as easy as rolling off a log by metal liquid corrode, perforation, the serviceable life of thermopair is short.In order to prolong the serviceable life of thermopair, the technical scheme that people propose has: the composition that improves coating; The bimetal tube protection; At the nonmetal net of 1Cr8Ni9Ti protection tube outer wrapping multilayer, in the 1Cr18Ni9Ti protection tube, fill non-metallic material etc., these technical schemes are producing effect in varying degrees, but more or less there are some problems, come off easily as surface coating, each brushing all will slowly heat up and carefully toast; Appearance poor during the nonmetal net of metal tube outer wrapping, complex procedures; Fill non-metallic material and can not stop protection tube by corrode in the 1Cr18Ni9Ti protection tube, and thermode is difficult for taking out, maintenance difficulty is big, and influences heat-transfer effect.
Summary of the invention
The purpose of this utility model is exactly under the prerequisite that does not influence heat transfer efficiency, utilizes the oxide layer of ground floor and the nitration case double shielding of the second layer, metal liquid and thermode safety are isolated, thus the serviceable life of realizing the prolongation thermopair.
The utility model can be realized in the following manner: after thermode is with insulation tube, in the protection tube of packing into, be connected with terminal box, the protection tube ground floor is an oxide layer, and the second layer is a nitration case.Oxide layer is the potpourri of alundum (Al and titania or alundum (Al and zirconium dioxide.
The utlity model has highly sensitively, the life-span is long, and response speed is fast, is not stained with the characteristics of solution, and can reach more than 2500 hours serviceable life, is mainly used in the measurement and the control of aluminium, magnesium, zinc metal or aluminium alloy, magnesium alloy, kirsite fluid temperature.
Description of drawings
Below in conjunction with accompanying drawing, the utility model will be further described.
Fig. 1 is a structural representation of the present utility model.
At Fig. 1,1 is thermode, and 2 is insulation tube, and 3 is protection tube, and 4 is terminal box, and 5 is nitration case, and 6 is oxide layer.
Embodiment
Please read Fig. 1, on the basis of existing thermopair, after promptly thermode 1 is with insulation tube 2; pack in the protection tube 3; be connected with terminal box 4,1Cr18Ni9Ti protection tube 1 removes oil purification, through blasting treatment; place heating furnace; earlier get rid of furnace air with ammonia after going into stove, nitriding temperature is controlled at 500-560 ℃, ammonia will decomposite activated nitrogen atom under the high temperature; after protected pipe 3 surfaces absorb, form the nitration case 5 of 0.4-0.5mm and spread to nexine.After nitrogenize finished, protection tube 3 was cooled to below 200 ℃ with stove, stopped to come out of the stove for ammonia.The protection tube 3 that generates nitration case 5 is used the surface that is sprayed on nitration case 5 through the alundum (Al of high temperature melting and titania or alundum (Al and zirconium dioxide again, form the oxide layer 6 of 0.4-0.5mm.She Ji purpose is like this: oxide layer 6 has the extremely strong liquid of anti-aluminium corrode ability, but be not complete metallurgical binding by the spray metal, in case certain comes off, rely on nitration case 5, also can play a protective role.
When the utility model used, preheating on melting furnace then, was inserted thermopair in the aluminium alloy liquid, with the thermoelectrical potential of instrument detecting from terminal box 4 lead-in wires, just can show the temperature of aluminium alloy liquid.
Claims (2)
1, a kind of thermopair of double shielding after thermode (1) is with insulation tube (2), in the protection tube of packing into (3), is connected with terminal box (4), it is characterized in that protection tube (3) ground floor is oxide layer (6), and the second layer is nitration case (5).
2, the thermopair of double shielding according to claim 1 is characterized in that oxide layer (6) is the potpourri of alundum (Al and titania or alundum (Al and zirconium dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200431305U CN2684173Y (en) | 2004-02-26 | 2004-02-26 | Double-layer protected thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200431305U CN2684173Y (en) | 2004-02-26 | 2004-02-26 | Double-layer protected thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2684173Y true CN2684173Y (en) | 2005-03-09 |
Family
ID=34607967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200431305U Expired - Fee Related CN2684173Y (en) | 2004-02-26 | 2004-02-26 | Double-layer protected thermocouple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2684173Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936783A (en) * | 2010-08-03 | 2011-01-05 | 北京航空航天大学 | Thermoelectric couple with yttrium oxide protecting tube and method for manufacturing yttrium oxide protecting tube by jet injection moulding process |
-
2004
- 2004-02-26 CN CNU2004200431305U patent/CN2684173Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936783A (en) * | 2010-08-03 | 2011-01-05 | 北京航空航天大学 | Thermoelectric couple with yttrium oxide protecting tube and method for manufacturing yttrium oxide protecting tube by jet injection moulding process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050309 Termination date: 20120226 |