CN2708284Y - Oxidation resistant tungsten-rhenium thermal couple - Google Patents
Oxidation resistant tungsten-rhenium thermal couple Download PDFInfo
- Publication number
- CN2708284Y CN2708284Y CN 200420060115 CN200420060115U CN2708284Y CN 2708284 Y CN2708284 Y CN 2708284Y CN 200420060115 CN200420060115 CN 200420060115 CN 200420060115 U CN200420060115 U CN 200420060115U CN 2708284 Y CN2708284 Y CN 2708284Y
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- protection tube
- tube
- rhenium
- filled
- thermopair
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Abstract
The utility model relates to an oxidation resistant tungsten-rhenium thermal couple continuously carrying out the measurement of high temperature in the oxidation environment, comprising an outer protection tube and an insulating tube inside the outer protection tube. The insulating tube is equipped with the tungsten-rhenium thermal couple wire, and an inner protection tube is arranged between the outer protection tube and the insulating tube. A first filler is filled between the outer protection tube and the inner protection tube, and a second filler is filled between the inner protection tube and the insulating tube. The thermal couple has stronger high temperature resistance and oxidation resistance, and can protect the stability of the thermoelectric force. The utility model not only can replace partial expensive platinum-rhodium thermal couples, but also can be used in the extraordinarily high temperature field of some special situations.
Description
Technical field
The utility model relates to a kind ofly can carry out pyrometric oxidation resistant tungsten-rhenium thermopair continuously in well-oxygenated environment.
Technical background
In commercial production and scientific research, temperature element is still based on thermopair, and it is the temperature measurement accuracy height not only, and is easy to realize the automatic control of heating process.Thermopair mainly is made up of terminal box and thermopair body, and the thermopair body comprises outer protection tube and interior insulation tube thereof, is provided with thermocouple wire in the insulation tube.In existing thermopair, more the high temperature field is adopted and is worth expensive noble-metal thermocouple (platinum rhodium thermocouple), though and other thermopair such as Wolfram rhenium heat electric couple can measure 2300 ℃, but because tungsten-rhenium wire has the build-in attribute that at high temperature is easy to oxidation, thereby Wolfram rhenium heat electric couple can't be used in well-oxygenated environment, but the test of temperature often is again to carry out in well-oxygenated environment in commercial production and the scientific research, so existing Wolfram rhenium heat electric couple can't be given full play to its thermoelectricity capability.In order to improve the oxidation resistance of Wolfram rhenium heat electric couple, adopted following solution at present: the one, adopt surface-treated method (as surface siliconization), though improved the oxidation resistance of thermocouple wire to a certain extent, but the serviceable life of thermocouple wire is not long, and, surface modification changes owing to causing thermoelectrical potential, simultaneously when high temperature uses, because the lining Elements Diffusion makes thermoelectrical potential produce drift; The 2nd, between the outer protection tube of thermopair and insulation tube, fill insulating powder and reductive agent, the protection thermocouple wire is had certain effect, but do not deal with problems yet at all, and reductive agent easily directly contacts with thermocouple wire, can make drift of thermo emf; Also having kind method is that thermocouple wire is packed in the quartz ampoule, and quartz ampoule is evacuated or charges into inert gas, the method complex process, and quartz ampoule can not be high temperature resistant, generally can only use below 1400 ℃, fail to give full play to the elevated temperature heat electrical property of Wolfram rhenium heat electric couple.
The utility model content
The purpose of this utility model provides a kind of oxidation resistant tungsten-rhenium thermopair that can use continuously in high temperature, well-oxygenated environment.
Oxidation resistant tungsten-rhenium thermopair described in the utility model; comprise outer protection tube and interior insulation tube thereof; be provided with the Wolfram rhenium heat electric couple silk in the insulation tube; also be provided with interior protection tube outside between protection tube and the insulation tube; be filled with first filling material between protection tube and the interior protection tube outside, between interior protection tube and insulation tube, be filled with second filling material.
Be filled with the 3rd filling material between protection tube top and the interior protection tube top outside.
Described first filling material that is filled between outer protection tube and the interior protection tube is the potpourri of insulating powder and reductive agent.
Second filling material in described being filled between protection tube and the insulation tube is the potpourri of insulating powder and oxygen scavenger.
Described the 3rd filling material that is filled between outer protection tube top and the interior protection tube top is the Heat Conduction Material with good heat conductive performance, as dag etc.
Oxidation resistant tungsten-rhenium thermopair described in the utility model, first filling material between its outer protection tube and the interior protection tube---insulating powder and reductive agent, can improve the heat-resisting quantity of thermopair, reduce the air content in the protection tube, and in use, even there is a spot of surrounding air (furnace gas) to infiltrate in the protection tube, the reductive agent reaction that also can be filled immediately in the thing generates reducibility gas and does not cause the thermocouple wire oxidation; Second filling material---insulating powder and oxygen scavenger in it between protection tube and the insulation tube, can make remaining air in space between the insulating powder and the space between insulation tube and thermocouple wire, at high temperature immediately with filling material in oxygen scavenger reaction and form inert gas, further stopped contacting of thermocouple wire and oxygen, and the reductive agent in the filling material does not directly contact with thermocouple wire, and can not make thermoelectrical potential produce drift, so structure of this double shielding tubular type of the utility model, both protected the stability of thermoelectrical potential, prevented the oxidation of thermocouple wire again, made the thermopair can be at high temperature with this kind structure, use continuously in the well-oxygenated environment; Simultaneously be filled with filling material between protection tube top and the interior protection tube top outside---Heat Conduction Material, can increase the thermal conductivity of thermopair body, influence the sensitivity of thermopair in one deck behind the protection tube to be unlikely having increased to temperature.
By changing protection tube material and fill material; can make the temperature-measuring range of the utility model thermopair extend to the high-temperature region from low-temperature space; and can extend to special media from general medium; not only can replace the platinum rhodium thermocouple of partial valence value costliness, but also can be applicable to the superhigh temperature field of some special occasions.
Description of drawings
Now in conjunction with the accompanying drawings the utility model is described in further detail.
Fig. 1 looks synoptic diagram for the master of a kind of concrete structure of oxidation resistant tungsten-rhenium thermopair described in the utility model.
Embodiment
As shown in Figure 1, this oxidation resistant tungsten-rhenium thermopair mainly is made up of terminal box 1 and thermopair body 2, wherein thermopair body 2 comprises outer protection tube 3 and interior insulation tube 7 thereof, be provided with Wolfram rhenium heat electric couple silk 9 in the insulation tube 7, protection tube 4 in also being provided with between protection tube 3 and the insulation tube 7 outside is filled with first filling material 5---insulating powder and reductive agent outside between protection tube 3 and the interior protection tube 4; Between interior protection tube 4 and insulation tube 7, be filled with second filling material 6---insulating powder and oxygen scavenger; Be filled with the 3rd filling material 8---Heat Conduction Material between protection tube 3 tops and interior protection tube 4 tops outside, this Heat Conduction Material is a dag.
Claims (2)
1, a kind of oxidation resistant tungsten-rhenium thermopair; comprise outer protection tube (3) and interior insulation tube (7) thereof; be provided with Wolfram rhenium heat electric couple silk (9) in the insulation tube (7); it is characterized in that: also be provided with interior protection tube (4) between protection tube (3) and the insulation tube (7) outside; be filled with first filling material (5) between protection tube (3) and the interior protection tube (4) outside, between interior protection tube (4) and insulation tube (7), be filled with second filling material (6).
2, oxidation resistant tungsten-rhenium thermopair according to claim 1 is characterized in that: be filled with the 3rd filling material (8) between protection tube (3) top and interior protection tube (4) top outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420060115 CN2708284Y (en) | 2004-07-03 | 2004-07-03 | Oxidation resistant tungsten-rhenium thermal couple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420060115 CN2708284Y (en) | 2004-07-03 | 2004-07-03 | Oxidation resistant tungsten-rhenium thermal couple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2708284Y true CN2708284Y (en) | 2005-07-06 |
Family
ID=34851980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420060115 Expired - Lifetime CN2708284Y (en) | 2004-07-03 | 2004-07-03 | Oxidation resistant tungsten-rhenium thermal couple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2708284Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7712957B2 (en) | 2005-08-24 | 2010-05-11 | Heraeus Electro-Nite International N.V. | Device for measuring temperature in molten metals |
| CN108955927A (en) * | 2018-07-24 | 2018-12-07 | 江苏兆龙电气有限公司 | One kind being suitable for the Wolfram rhenium heat electric couple of oxidation and reducing atmosphere at 800 ~ 2300 DEG C |
-
2004
- 2004-07-03 CN CN 200420060115 patent/CN2708284Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7712957B2 (en) | 2005-08-24 | 2010-05-11 | Heraeus Electro-Nite International N.V. | Device for measuring temperature in molten metals |
| US8033717B2 (en) | 2005-08-24 | 2011-10-11 | Heraeus Electro-Nite International N.V. | Device for measuring temperature in molten metals |
| CN108955927A (en) * | 2018-07-24 | 2018-12-07 | 江苏兆龙电气有限公司 | One kind being suitable for the Wolfram rhenium heat electric couple of oxidation and reducing atmosphere at 800 ~ 2300 DEG C |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140703 Granted publication date: 20050706 |