SU148552A1 - Electric furnace for graduation of noble metal thermocouples up to 1800 ' - Google Patents
Electric furnace for graduation of noble metal thermocouples up to 1800 'Info
- Publication number
- SU148552A1 SU148552A1 SU737359A SU737359A SU148552A1 SU 148552 A1 SU148552 A1 SU 148552A1 SU 737359 A SU737359 A SU 737359A SU 737359 A SU737359 A SU 737359A SU 148552 A1 SU148552 A1 SU 148552A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- electric furnace
- graduation
- noble metal
- furnace
- graphite
- Prior art date
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Description
Известные электропечи дл градуировки термопар из благородных металлов до 1800°, состо щие из печи электросопротивлени с трубчатым графитовым нагревателем, не могут обеспечить равномерное температурное поле в рабочем пространстве печи и предохранить от попадани в нее продуктов горенп графита. Вследствие этого в рабочем пространстве печи возникает восстановительна среда, вызывающа науглероживание благородных металлов.The known electric furnaces for the graduation of noble-metal thermocouples up to 1800 °, consisting of an electrical resistance furnace with a tubular graphite heater, cannot provide a uniform temperature field in the furnace working space and prevent the penetration of Gorenp graphite products into it. As a result, a reducing environment arises in the working space of the furnace, causing carburization of noble metals.
Предлагаема э.тектроиечь отличаетс от известных тем. что внутри , нагревател установлена труба из окиси алюмини и танталовы экраи между ни.ми. Это иозволит полностью предохранить рабочее простра}1ство печи от попадани в иее продуктов горени графита.The proposed ectectrum differs from the known topics. inside the heater, an alumina tube and a tantalum screen are installed between them. This will allow you to completely protect the working space} of the furnace from falling into its products of graphite combustion.
На чертеже изображена предлагаема электропечь д;1Я градуировки термопар из благородных металлов до 1800.The drawing shows the proposed electric furnace d; 1I graduations of thermocouples from precious metals up to 1800.
Нагревате.тьным эле.ментом э.тектропечи вл етс графитова труба /, вокруг которой размещен изол тор 2, выполненный, например, изламповой сажи. Лампова сажа создает восстановительную атмосферу вокруг графитового нагревател и предохран ет его от интенсивного; окислени . Внутри графитового нагревател установлена труба 3 из; окиси алюмини , внутри которой помещаете градуируема термопара.The heating element of the electric furnace is a graphite pipe / around which is placed an insulator 2, made, for example, of a lamp soot. Lamp soot creates a reducing atmosphere around the graphite heater and protects it from intense; oxidation. Inside the graphite heater is installed pipe 3 of; aluminum oxide, inside which you place a graduated thermocouple.
Дл защиты рабочего пространства печи от попадани в нее продуктов горени 1рафита .между нагревателе.м и трубой 3 установлен танталовый экран 4. Тантал обладает высокой химической активностью при повышенной те.мпературе, вследствие чего частицы графита вызывают его карбидизапию, что обеспечивает защиту благородных металлов термопары от науглероживани .To protect the furnace's working space from ingestion of raffit burning products between the heater and pipe 3, a tantalum screen 4 is installed. Tantalum has a high chemical activity at elevated temperature. As a result, graphite particles cause its carbidization, which ensures protection of noble metals from carburizing.
Д;1 охлаждени электропечи снаружи в ее стенках проложены змеевики 5, по которым циркулирует проточна вода.D; 1 of the cooling of the electric furnace, coils 5 are laid outside its walls, through which flowing water circulates.
Опытный образец электропечи, испытанный в ВНИИМ, показал, что в печи обеспечиваетс стабильна температура до 1800° с предохранением ее рабочего пространства от попадани продуктов горени графита . Срок службы одного графитового нагревател при температуре около 1800° составл ет 100-150 часов. При смене нагревател одновA prototype of an electric furnace, tested at VNIIM, showed that a stable temperature of up to 1800 ° C is maintained in the furnace with the protection of its working space from the entry of graphite burning products. The service life of one graphite heater at a temperature of about 1800 ° is 100-150 hours. When changing a single heater
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU737359A SU148552A1 (en) | 1961-07-05 | 1961-07-05 | Electric furnace for graduation of noble metal thermocouples up to 1800 ' |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU737359A SU148552A1 (en) | 1961-07-05 | 1961-07-05 | Electric furnace for graduation of noble metal thermocouples up to 1800 ' |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU148552A1 true SU148552A1 (en) | 1961-11-30 |
Family
ID=48303793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU737359A SU148552A1 (en) | 1961-07-05 | 1961-07-05 | Electric furnace for graduation of noble metal thermocouples up to 1800 ' |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU148552A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4525080A (en) * | 1983-02-08 | 1985-06-25 | The United States Of America As Represented By The Department Of Energy | Apparatus for accurately measuring high temperatures |
| US5608838A (en) * | 1994-12-07 | 1997-03-04 | Brookley; Charles E. | Blackbody type heating element for calibration furnace with pyrolytic graphite coating disposed on end cap electrode members |
| US6193411B1 (en) * | 1999-02-25 | 2001-02-27 | Industrial Technology Research Institute | Calibrator for contact and non-contact thermometer |
| US6398405B1 (en) * | 1998-12-11 | 2002-06-04 | Agency Of Industrial Science And Technology | Fixed-point crucible, fixed-point temperature realizing apparatus using the crucible and temperature calibration method |
-
1961
- 1961-07-05 SU SU737359A patent/SU148552A1/en active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4525080A (en) * | 1983-02-08 | 1985-06-25 | The United States Of America As Represented By The Department Of Energy | Apparatus for accurately measuring high temperatures |
| US5608838A (en) * | 1994-12-07 | 1997-03-04 | Brookley; Charles E. | Blackbody type heating element for calibration furnace with pyrolytic graphite coating disposed on end cap electrode members |
| US6398405B1 (en) * | 1998-12-11 | 2002-06-04 | Agency Of Industrial Science And Technology | Fixed-point crucible, fixed-point temperature realizing apparatus using the crucible and temperature calibration method |
| US6193411B1 (en) * | 1999-02-25 | 2001-02-27 | Industrial Technology Research Institute | Calibrator for contact and non-contact thermometer |
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