JPH0429385Y2 - - Google Patents
Info
- Publication number
- JPH0429385Y2 JPH0429385Y2 JP1985192930U JP19293085U JPH0429385Y2 JP H0429385 Y2 JPH0429385 Y2 JP H0429385Y2 JP 1985192930 U JP1985192930 U JP 1985192930U JP 19293085 U JP19293085 U JP 19293085U JP H0429385 Y2 JPH0429385 Y2 JP H0429385Y2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- corrosion resistance
- alumina
- inner tube
- zirconia
- 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.)
- Expired
Links
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 239000003575 carbonaceous material Substances 0.000 claims description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 238000005260 corrosion Methods 0.000 description 13
- 230000007797 corrosion Effects 0.000 description 13
- 230000001681 protective effect Effects 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000155 melt Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- LIXXICXIKUPJBX-UHFFFAOYSA-N [Pt].[Rh].[Pt] Chemical compound [Pt].[Rh].[Pt] LIXXICXIKUPJBX-UHFFFAOYSA-N 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は、高温において雰囲気と融体のいず
れの腐食にも優れた熱電対用保護管の改良に関す
る。[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to an improvement of a thermocouple protection tube that is excellent against both atmospheric and molten corrosion at high temperatures.
（従来の技術）
従来、高温における測温方法として熱電対を使
用する場合、外部からの物理的、化学的影響から
熱電対を保護し、安定して検出特性を維持するた
めに保護管が用いられており、この保護管とし
て、ムライト、アルミナ、ジルコニア等よりなる
ものが用いられているが、雰囲気ガス及び金属、
ガラス、スラグ、塩等の融体に対する耐食性が充
分ではない。この耐食性を改善するため、アルミ
ナに１〜35重量％のクロミアを添加して溶融金属
に対する耐食性を向上させるもの（特公昭57−
49512）、磁器質の保護管本体外周に溶融金属に対
する溶損性と断熱性を有する耐火物の保護層を設
けるもの（特公昭58−496692）、磁気質保護管に
炭素と耐火性成分からなる補助管をラバープレス
成形により被覆するもの（特公昭58−45653）、ま
たは、近年では石英ガラスの外側管とBN（窒化
ボロン）の内側管よりなる２重管を用いるもの
（特開昭59−86274、２重管として、特開昭59−
88881）等が提案されている。(Prior art) Conventionally, when using a thermocouple as a temperature measurement method at high temperatures, a protection tube is used to protect the thermocouple from external physical and chemical influences and to maintain stable detection characteristics. This protective tube is made of mullite, alumina, zirconia, etc., but it is
Corrosion resistance against melts such as glass, slag, and salt is insufficient. In order to improve this corrosion resistance, 1 to 35% by weight of chromia is added to alumina to improve its corrosion resistance against molten metal.
49512), a protective layer of refractory material with corrosion resistance and heat insulation properties against molten metal is provided around the outer periphery of the porcelain protective tube body (Special Publication No. 58-496692), a magnetic protective tube made of carbon and refractory components. A type in which the auxiliary tube is covered by rubber press molding (Japanese Patent Publication No. 58-45653), or, in recent years, a double tube consisting of an outer tube made of quartz glass and an inner tube made of BN (boron nitride) (Japanese Patent Publication No. 59-1989). 86274, as a double pipe, JP-A-59-
88881) etc. have been proposed.
（考案が解決しようとする問題点）
しかしながら、クロミアを添加するものは、こ
の添加により還元雰囲気に対する安定性を低下さ
せるものであり、他の提案は、いずれも融体や雰
囲気のいずれかに対応して考えられたものであつ
て、保護管がガラス、金属等に曝された状態にお
いて酸化あるいは還元する場合、融体までも酸
化、還元反応が生ずるため、雰囲気と融体の界面
は特に腐食が大きくなり、上記提案では対応する
ことができない。そこで、この考案は上記従来の
ものを改良するものであつて、雰囲気と融体のい
ずれに対しても耐食性のある保護管を得ようとす
るものである。(Problem that the invention attempts to solve) However, the addition of chromia reduces stability against reducing atmospheres, and all other proposals are compatible with either melts or atmospheres. When the protective tube is oxidized or reduced while being exposed to glass, metal, etc., the oxidation or reduction reaction also occurs in the molten material, so the interface between the atmosphere and the molten material is particularly susceptible to corrosion. becomes large, and cannot be handled by the above proposal. Therefore, this invention is an improvement on the above-mentioned conventional one, and aims to provide a protective tube that is resistant to corrosion both in the atmosphere and in the melt.
（問題点を解決するための手段）
アルミナ、ジルコニアとマグネシア質の１種以
上よりなる外側管及び内側管の間に、炭素質より
なる中間管を設け、更には、中間管以外に非酸化
性ガスを充填して構成するものである。(Means for solving the problem) An intermediate tube made of carbonaceous material is provided between the outer tube and the inner tube made of one or more of alumina, zirconia, and magnesia, and furthermore, a non-oxidizing material other than the intermediate tube is provided. It is constructed by filling it with gas.
（作用）
この考案は上記のように構成されるので、還元
雰囲気下において安定し、かつスラグに対する耐
食性、高熱伝導率を原因とする耐久ポーリング
性、高温強度に極めて優れている炭素質材料を、
内外においてアルミナ、ジルコニアもしくはアル
ミナ質により被覆するので、炭素質材料よりなる
保護管の近傍においては還元雰囲気が維持され、
炭素質材料の使用範囲を中性もしくは弱酸化雰囲
気において、特に充分高温下においても耐食性を
もつものとなつたのである。(Function) Since this invention is constructed as described above, a carbonaceous material that is stable in a reducing atmosphere and has excellent corrosion resistance against slag, durable poling property due to high thermal conductivity, and high-temperature strength is used.
Since the inside and outside are coated with alumina, zirconia, or alumina, a reducing atmosphere is maintained near the protective tube made of carbonaceous material.
Carbonaceous materials can now be used in neutral or weakly oxidizing atmospheres, and in particular, have corrosion resistance even at sufficiently high temperatures.
上記炭素質材料の耐食性は、炭素含有量が高
く、高密度である程良好であり、通常の黒鉛質成
形体を使用できる。また、内外側管は不純物が少
なく高密度の方が耐食性、気密性に優れ、この特
性に加え、中間管に間隙を設けることにより内外
側管の熱膨張差を吸収し、中間管の割れを防止す
るものであり、この間隙に非酸化性ガスを封入す
ることにより、これらの特性を一層向上すること
ができる。 The higher the carbon content and the higher the density, the better the corrosion resistance of the carbonaceous material, and a normal graphite molded body can be used. In addition, if the inner and outer tubes have fewer impurities and are denser, they have better corrosion resistance and airtightness.In addition to these characteristics, providing a gap in the intermediate tube absorbs the difference in thermal expansion between the inner and outer tubes, preventing cracks in the intermediate tube. By filling this gap with non-oxidizing gas, these characteristics can be further improved.
内側管は、炭素質保護管近傍の雰囲気保持効果
があり、白金−白金ロジウムの熱電対については
内側管の存在が不可欠となるものである。 The inner tube has the effect of maintaining the atmosphere near the carbonaceous protection tube, and the presence of the inner tube is essential for platinum-platinum rhodium thermocouples.
（実施例）
この考案を図に示す実施例について説明する。
１は外側管、２は内側管であり、ともにアルミ
ナ、ジルコニア及びマグネシア質材料の１種以上
より構成され、内側管２内には、白金−白金ロジ
ウム、タングステン、レニウム等よりなる熱電対
５を収納する。外側管１と内側管２間には炭素質
材料よりなる中間管３を介在し、必要に応じ、第
２図に示すように中間管３の内外すなわちいずれ
もアルミナ質の外側管１、内側管２との間に炭素
粉末４を充填したり、第３図に示すように中間管
３とマグネシア質外側管１とアルミナ質内側管２
との間にそれぞれアルゴンガス６を封入したもの
であり、後端をろう材７により封塞されるもので
ある。(Example) An example of this invention shown in the drawings will be described.
1 is an outer tube, and 2 is an inner tube, both of which are made of one or more of alumina, zirconia, and magnesia materials. Inside the inner tube 2 is a thermocouple 5 made of platinum-platinum rhodium, tungsten, rhenium, etc. Store it. An intermediate tube 3 made of carbonaceous material is interposed between the outer tube 1 and the inner tube 2, and if necessary, as shown in FIG. 2, the outer tube 1 and the inner tube are both made of alumina. 2, or as shown in FIG.
Argon gas 6 is sealed between the two, and the rear end is sealed with a brazing filler metal 7.
第２図の炭素粉末を充填するものは、これによ
り断熱され、熱電対の応答性は若干低下するもの
であるが、第３図の非酸化性ガスを封入したもの
は、応答性もよく、高い耐食性をもつものであ
る。 The one shown in Figure 2 filled with carbon powder is insulated and the responsiveness of the thermocouple is slightly reduced, but the one filled with non-oxidizing gas shown in Figure 3 has good responsiveness. It has high corrosion resistance.
（考案の効果）
以上のとおり、この考案の複合管よりなるもの
は、雰囲気と融体のいずれに対する耐食性も良好
であり、かつ中間管の割れを防止することができ
石炭ガス化、液化プラント、MHD発電等におい
て好適に利用できるという優れた効果をもつもの
である。(Effects of the invention) As described above, the composite pipe of this invention has good corrosion resistance against both the atmosphere and the melt, and can prevent cracks in the intermediate pipe, making it suitable for use in coal gasification and liquefaction plants. It has an excellent effect that it can be suitably used in MHD power generation, etc.
第１図乃至第３図はこの考案の異なる実施例の
縦断面図である。
１……外側管、２……内側管、３……中間管、
４……炭素粉末、５……熱電対、６……非酸化性
ガス、７……ろう材。
1 to 3 are longitudinal sectional views of different embodiments of this invention. 1...outer tube, 2...inner tube, 3...middle tube,
4... Carbon powder, 5... Thermocouple, 6... Non-oxidizing gas, 7... Brazing metal.
Claims (1)
種以上より形成される外側管及び内側管の間に
炭素質よりなる中間管を介在させ、この中間管
と外側管との間及び、中間管と内側管との間に
間隙を有する複合管型熱電対用保護管。 (2) 中間管の内方及び又は外方に非酸化性ガスを
封入してなる実用新案登録請求の範囲第１項記
載の複合管型熱電対用保護管。[Scope of utility model registration claims] (1) Alumina, zirconia and magnesia 1
A composite tube type in which an intermediate tube made of carbonaceous material is interposed between an outer tube and an inner tube formed from two or more materials, and gaps are provided between the intermediate tube and the outer tube and between the intermediate tube and the inner tube. Protection tube for thermocouples. (2) The composite tube-type thermocouple protection tube as set forth in claim 1 of the utility model registration claim, which is formed by sealing a non-oxidizing gas inside and/or outside of the intermediate tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985192930U JPH0429385Y2 (en) | 1985-12-17 | 1985-12-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985192930U JPH0429385Y2 (en) | 1985-12-17 | 1985-12-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62102133U JPS62102133U (en) | 1987-06-29 |
| JPH0429385Y2 true JPH0429385Y2 (en) | 1992-07-16 |
Family
ID=31148474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985192930U Expired JPH0429385Y2 (en) | 1985-12-17 | 1985-12-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0429385Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006138647A (en) * | 2004-11-10 | 2006-06-01 | Ricoh Co Ltd | Thermocouple, reaction system, and crystal growth device |
| JP2006170692A (en) * | 2004-12-14 | 2006-06-29 | Toho Titanium Co Ltd | Thermometer for measuring temperature in chlorination furnace |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10215645B2 (en) | 2013-08-08 | 2019-02-26 | Furuya Metal Co., Ltd. | Thermometer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5340354A (en) * | 1976-09-24 | 1978-04-12 | Tokyo Juki Industrial Co Ltd | Auxiliary bed for sewing machine |
| JPS53107378A (en) * | 1977-03-01 | 1978-09-19 | Toshiba Ceramics Co | Protection tubing for measuring temperature of melting metal continuously and method for manufacturing said tubing |
-
1985
- 1985-12-17 JP JP1985192930U patent/JPH0429385Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5340354A (en) * | 1976-09-24 | 1978-04-12 | Tokyo Juki Industrial Co Ltd | Auxiliary bed for sewing machine |
| JPS53107378A (en) * | 1977-03-01 | 1978-09-19 | Toshiba Ceramics Co | Protection tubing for measuring temperature of melting metal continuously and method for manufacturing said tubing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006138647A (en) * | 2004-11-10 | 2006-06-01 | Ricoh Co Ltd | Thermocouple, reaction system, and crystal growth device |
| JP2006170692A (en) * | 2004-12-14 | 2006-06-29 | Toho Titanium Co Ltd | Thermometer for measuring temperature in chlorination furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62102133U (en) | 1987-06-29 |
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