CN2067405U - High-temp. oxidation-resistant w-re thermocouple - Google Patents
High-temp. oxidation-resistant w-re thermocouple Download PDFInfo
- Publication number
- CN2067405U CN2067405U CN 90205534 CN90205534U CN2067405U CN 2067405 U CN2067405 U CN 2067405U CN 90205534 CN90205534 CN 90205534 CN 90205534 U CN90205534 U CN 90205534U CN 2067405 U CN2067405 U CN 2067405U
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- thermocouple
- outer tube
- core
- resistant
- thermo wires
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Abstract
The utility model relates to a high-temperature oxidation-resistant W-Re thermocouple. The high-temperature oxidation-resistant W-Re thermocouple is suitable for using in the oxidative atmosphere of 800 to 1600 DEG C and more than 1600 DEG C for a long time. The high-temperature oxidation-resistant W-Re thermocouple is characterized in that the vacuum seals of W-Re thermocouple wires are arranged in a quartz tube with double holes and a thick wall; thermocouple wires on the both ends of a thermocouple core and the seal of the quartz tube are integrated into one unit; outer sleeves adopt a metal sleeve and a porcelain sleeve which are fire resistant. The explosion resistant performance and the devitrification resistant performance of the thermocouple core are excellent; even if the thermocouple core is softened at high temperature, the thermocouple wires can not denuded in atmosphere, so the utility model not only raises use temperature, but also prolongs service life.
Description
The utility model belongs to thermometric thermoelectric element---thermopair.Mainly be applicable to more than 800 ℃ continuous temperature measurement in the oxidizing atmosphere.
Usually, more than 800 ℃, when particularly in the oxidizing atmosphere more than 1300 ℃, measuring temperature,, adopt platinum-rhodium thermocouple comparatively suitable as thermoelectric sensitive element.But because platinum-rhodium scarcity of resources, platinum-rhodium thermocouple costs an arm and a leg.Whole nation every profession and trade needs about 100 kilograms of platinum rhodium thermo wires every year approximately, is worth about 1,500 ten thousand yuan.For this reason, people at its substitute of research, wherein comparatively it is desirable to tungsten-rhenium thermocouple.
But the major defect of tungsten-rhenium thermocouple is very easily oxidation in the atmosphere more than 400 ℃, can't operate as normal.
In order to solve anti-oxidant problem, way early is to adopt the fire resistive material filler that the W-Re thermo wires is filled in the magnetosheath pipe.But the magnetosheath pipe at high temperature still has the permeation phenomenon, and oxygen still can enter in the magnetic tube, in the fire resistive material filler powder residual air is arranged also in the pipe, and in fact thermo wires is not isolated fully with air.Therefore, this thermopair also is difficult at high temperature use for a long time.
Chinese patent CN88202938 has solved the anti-oxidant problem of W-Re thermo wires substantially.Its principal character be with W-Re thermo wires sealing by fusing or press seal in quartz ampoule, form even core.But because the quartz ampoule domestic demand is filled blanket gas, the manufacture craft more complicated; In addition, quartzy tube wall is thin, easily bursts, and outer tube adopts magnetic tube, and intensity is low.Under abominable condition of work,, just lost antioxidation in case protective casing breaks.It is only limited to is using below 1600 ℃.
The purpose of this utility model is to provide a kind of and is suitable at 800～1600 ℃ with at the medium-term and long-term tungsten-rhenium thermocouple of working of oxidizing atmosphere more than 1600 ℃.
In order to achieve the above object, its major technique measure be with W-Re thermo wires vacuum sealing by fusing in diplopore heavy wall quartz ampoule, form even core, after being about to the W-Re thermo wires and packing in the diplopore heavy wall quartz ampoule, be evacuated, with thermo wires and quartz ampoule sealing by fusing under vacuum at even core two is one, with the fire resistive material filler even core is fixed in the treated outer tube; Outer tube is divided into two kinds: when thermopair what use below 1300 ℃, adopt whole metal jacket pipe; What use more than 1300 ℃, outer tube is made up of two joints, and promptly head (near by the thermometric object) adopts the refractory ceramics outer tube, and afterbody (by connecting the connector portions of temperature instrumentation) adopts metal jacket pipe, and two joint outer tubes joints are one.
Compare with tungsten-rhenium thermocouple of the prior art, the utlity model has following advantage:
1. can not only be suitable for 800～1600 ℃, but also can use more than 1600 ℃.
2. because the thermo wires and the quartz ampoule sealing by fusing at even core two are one, thermo wires is subjected to the positive confinement of quartz ampoule, and wall thickness of quartz tube, thereby the frying tolerance and the devitrification tolerance of even core have been improved greatly, even at high temperature softening, thermo wires can not expose in atmosphere yet, has improved serviceability temperature.
Outer tube adopt metal with refractory ceramics, so outer tube intensity and refractoriness improve the growth in serviceable life.
4. manufacture craft is simple.
Description of drawings
Accompanying drawing is a high-temperature oxidation resistant tungsten-rhenium thermocouple synoptic diagram.
In the accompanying drawing, 1 is outer tube, wherein below 1300 ℃, is the bulk metal outer tube; More than 1300 ℃, outer tube 1 is made up of two joints, and head is the refractory ceramics outer tube, and afterbody adopts metal jacket pipe, and two joint outer tubes joints are one; 2 is the tungsten-rhenium thermo wires; 3 is diplopore heavy wall quartz ampoule; 4 is the fire resistive material filler; 5 is binding post; 6 is patching panel.
After packing into W-Re thermo wires 2 in the diplopore heavy wall quartz ampoule 3, under vacuum, thermo wires and the quartz ampoule sealing by fusing with even core two is one again; The even core that sealing by fusing is good is packed in the outer tube 1, and fire resistive material filler 4 is inserted in the centre, with its fixing even core.The thermo wires that is exposed on the outside in the idol core directly is connected with binding post 5.
Claims (2)
1, a kind of Wolfram rhenium heat electric couple, pack into by the W-Re thermo wires and to form even core in the quartz ampoule, the idol core is packed in the outer tube, by fire resistive material filler 4 fixing even cores, it is characterized in that W-Re thermo wires 2 is to be contained in to form even core in the diplopore heavy wall quartz ampoule 3, the thermo wires at even core two and quartz ampoule sealing by fusing under vacuum is an one; And outer tube adopts two kinds of versions.
2, thermopair according to claim 1, it is characterized in that when thermopair when using below 1300 ℃, outer tube adopts whole metal sleeve; What use more than 1300 ℃, outer tube saves by two to be formed, and promptly head (near by the thermometric object) adopts the refractory ceramics outer tube, and afterbody adopts metal jacket pipe, and two joint outer tubes joints are one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90205534 CN2067405U (en) | 1990-05-04 | 1990-05-04 | High-temp. oxidation-resistant w-re thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90205534 CN2067405U (en) | 1990-05-04 | 1990-05-04 | High-temp. oxidation-resistant w-re thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2067405U true CN2067405U (en) | 1990-12-12 |
Family
ID=4886288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90205534 Withdrawn CN2067405U (en) | 1990-05-04 | 1990-05-04 | High-temp. oxidation-resistant w-re thermocouple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2067405U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156003A (en) * | 2011-02-25 | 2011-08-17 | 武汉武钢维苏威高级陶瓷有限公司 | Thermocouple assembly and manufacturing process |
| CN101663569B (en) * | 2007-05-24 | 2012-08-08 | Asm美国公司 | Thermocouple |
| CN104501524A (en) * | 2014-12-22 | 2015-04-08 | 合肥美的电冰箱有限公司 | Temperature sensing component and refrigeration equipment with same |
| CN105571734A (en) * | 2014-11-05 | 2016-05-11 | 张培康 | W-Re thermocouple working in high-precision ultra-high temperature oxidation, reduction and vacuum atmosphere |
| CN105628235A (en) * | 2014-09-29 | 2016-06-01 | 张培康 | Method for manufacturing high-performance tungsten-rhenium (W-Re) thermocouple by high-temperature double-sealing special filling vacuum |
-
1990
- 1990-05-04 CN CN 90205534 patent/CN2067405U/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101663569B (en) * | 2007-05-24 | 2012-08-08 | Asm美国公司 | Thermocouple |
| CN102156003A (en) * | 2011-02-25 | 2011-08-17 | 武汉武钢维苏威高级陶瓷有限公司 | Thermocouple assembly and manufacturing process |
| CN102156003B (en) * | 2011-02-25 | 2013-09-25 | 武汉武钢维苏威高级陶瓷有限公司 | Thermocouple assembly and manufacturing process |
| CN105628235A (en) * | 2014-09-29 | 2016-06-01 | 张培康 | Method for manufacturing high-performance tungsten-rhenium (W-Re) thermocouple by high-temperature double-sealing special filling vacuum |
| CN105571734A (en) * | 2014-11-05 | 2016-05-11 | 张培康 | W-Re thermocouple working in high-precision ultra-high temperature oxidation, reduction and vacuum atmosphere |
| CN104501524A (en) * | 2014-12-22 | 2015-04-08 | 合肥美的电冰箱有限公司 | Temperature sensing component and refrigeration equipment with same |
| CN104501524B (en) * | 2014-12-22 | 2017-09-19 | 合肥美的电冰箱有限公司 | The temperature module and the refrigeration plant with it |
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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 |