JP2596789B2 - Protection tube type thermometer - Google Patents
Protection tube type thermometerInfo
- Publication number
- JP2596789B2 JP2596789B2 JP63118975A JP11897588A JP2596789B2 JP 2596789 B2 JP2596789 B2 JP 2596789B2 JP 63118975 A JP63118975 A JP 63118975A JP 11897588 A JP11897588 A JP 11897588A JP 2596789 B2 JP2596789 B2 JP 2596789B2
- Authority
- JP
- Japan
- Prior art keywords
- protective tube
- main body
- temperature
- refractory layer
- protection tube
- 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 - Fee Related
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- Measuring Temperature Or Quantity Of Heat (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は溶融金属などの湯温を計測することのできる
熱電対保護管式の測温計に関するものである。Description: TECHNICAL FIELD The present invention relates to a thermocouple protection tube type thermometer capable of measuring the temperature of hot water such as molten metal.
［従来の技術］ 従来、溶銑、溶鋼等の溶融金属等の溶湯の温度を測定
する方法として一般に使用されているのは白金ロジウム
系熱電対（以下Ｂ熱電対と称す）の先端を石英管で保護
する消耗型温度計であり、通常溶銑、溶鋼等にその熱電
対を浸漬すると極めて短時間（10〜20秒間）のうちに感
熱部が溶融し使用不能となるので短時間に測温を終了し
なければならずかつ測定１回毎に熱電対を交換してい
た。このため、品質、操業の管理が困難で測温コストが
高いことから長時間連続して測温できる温度計が強く望
まれ、最近では溶融金属に耐食性の高いサイアロン、B
N,Al2O3−C,ZrO2−Moなどの熱電対保護管が提供されて
いる。[Prior Art] Conventionally, as a method of measuring the temperature of molten metal such as molten metal such as hot metal or molten steel, a platinum rhodium-based thermocouple (hereinafter referred to as a B thermocouple) is a quartz tube. This is a consumable thermometer that protects. Normally, when the thermocouple is immersed in hot metal, molten steel, etc., the thermosensitive part melts in a very short time (10 to 20 seconds) and becomes unusable, so the temperature measurement is completed in a short time And the thermocouple was replaced after each measurement. For this reason, it is difficult to control the quality and operation, and the cost of measuring the temperature is high.Therefore, a thermometer that can continuously measure the temperature for a long time is strongly desired.
Thermocouple protection tubes such as N, Al 2 O 3 —C, and ZrO 2 —Mo are provided.
［発明の解決しようとする課題］ しかしながら、これらの保護管を用いた温度計の場
合、溶銑や溶鋼での連続的測温では、投入の際の予熱や
測温中での酸化や耐食性が著しく悪く５〜30チャージぐ
らいで保護管が侵食されるため寿命が短い。[Problems to be Solved by the Invention] However, in the case of thermometers using these protective tubes, in continuous temperature measurement with hot metal or molten steel, oxidation and corrosion resistance during preheating during charging and during temperature measurement are remarkable. The service life is short because the protection tube is eroded by about 5 to 30 charges.
また、溶融金属中に投入する場合、ZrO2−Mo,Al2O3−
C,BN等の保護管を使用した熱電対保護管は熱衝撃性が高
いので、予熱は十分にしなくて使用されているが強度が
弱いことや酸化しやすいこと、耐食性が低いなどの点で
十分に長時間の測温に耐えうるものは少ない。Also, when injected into molten metal, ZrO 2 -Mo, Al 2 O 3-
Thermocouple protection tubes using protection tubes such as C and BN have high thermal shock resistance, so they are used without sufficient preheating.However, they have low strength, are easily oxidized, and have low corrosion resistance. Few can withstand a sufficiently long temperature measurement.
しかし、最近このような保護管として好ましい材質、
即ち溶融金属に対して優れた耐食性かつ十分な強度、耐
熱性、熱伝導性を有するものとして硼化物系セラミック
スが提案されている。特にZrB2は前記の材質条件を最も
具備しており、本発明を適用する場合に好ましい材料と
いえる。しかるに、この硼化物系セラミックスは一般の
金属に比べ靭性が低く、耐熱衝撃性も劣るため、溶融金
属などの高温度の湯温を断続的に繰り返した場合、保護
管の温度は1400℃以上、500℃以下の温度を上昇下降の
繰り返しをすることになり、保護管の内部に微細な亀裂
が発生し全体の割れを引き起こし、長時間連続して測温
する場合に比べて寿命が低下する問題が起こり、このよ
うな断続的測温においても長時間安定して測温可能な技
術が強く望まれていた。However, recently, a preferable material for such a protective tube,
That is, boride-based ceramics have been proposed as having excellent corrosion resistance and sufficient strength, heat resistance, and thermal conductivity to molten metal. Particularly ZrB 2 is the most provided the material conditions, it can be said that the preferred material when applying the present invention. However, since the boride-based ceramics have lower toughness and lower thermal shock resistance than ordinary metals, when the temperature of hot water such as molten metal is intermittently repeated, the temperature of the protective tube is 1400 ° C. or higher. The temperature rises and falls repeatedly at temperatures below 500 ° C, causing fine cracks inside the protective tube, causing the whole to crack and shortening the service life compared to continuous temperature measurement for a long time. Therefore, a technology capable of stably measuring the temperature for a long time even in such an intermittent temperature measurement has been strongly desired.
［課題を解決するための手段］ 本発明は前述の問題点を解決するためになされたもの
であり、熱電対を有する測温センサーと、この測温セン
サーの外周を囲む、非酸化物を主成分とするセラミック
スからなる保護管本体と、この保護管本体の先端部を除
いた外周を所定の間隙を介して囲む耐火物層とを備えて
いることを特徴とする保護管式測温計を提供するもので
ある。Means for Solving the Problems The present invention has been made to solve the above-mentioned problems, and mainly includes a temperature sensor having a thermocouple and a non-oxide surrounding the outer periphery of the temperature sensor. A protective tube type thermometer characterized by comprising a protective tube main body made of ceramics as a component, and a refractory layer surrounding the outer periphery of the protective tube main body excluding a tip portion with a predetermined gap therebetween. To provide.
本発明によれば、保護管本体の材質として非酸化物を
主成分とするセラミックスを採用したことにより、溶融
金属に対して優れた耐食性が得られる。また、保護管本
体の外周を耐火物層で囲んだことにより、保護管本体に
対する熱衝撃や機械的衝撃が緩和され、保護管本体の割
損を防止できる。更に保護管本体と耐火物層との間に間
隙を介在させたことにより、熱膨張差に起因する応力が
保護管本体にかかることがなく、また、機械的衝撃が耐
火物層で受け止められるため、保護管本体の破損をより
効果的に防止し得る。更にまた、保護管本体の先端部
は、耐火物層で覆われることなく、露出させた構造とし
たことにより、熱応答性が損なわれることがない。ADVANTAGE OF THE INVENTION According to this invention, the outstanding corrosion resistance with respect to a molten metal is acquired by employ | adopting the ceramics which has a non-oxide as a main component as a material of a protective tube main body. In addition, since the outer periphery of the protection tube main body is surrounded by the refractory layer, thermal shock and mechanical shock to the protection tube main body are reduced, and breakage of the protection tube main body can be prevented. Furthermore, since a gap is interposed between the protective tube main body and the refractory layer, stress due to a difference in thermal expansion is not applied to the protective tube main body, and mechanical shock is received by the refractory layer. In addition, the protection tube main body can be more effectively prevented from being damaged. Furthermore, the distal end of the protective tube main body is exposed without being covered with the refractory layer, so that thermal responsiveness is not impaired.
以下図面を参照して説明する。 This will be described below with reference to the drawings.
第１図は、本発明の基本的構成を説明する断面図であ
る。本発明の保護管式測温計は、熱電対２を内蔵したAl
2O3などの絶縁管３を、同じくAl2O3などの保護管４に組
み込んでなる測温センサーを有する。そして、この測温
センサーの外周を保護管本体1aと耐火物層1bとからなる
熱電対保護管１で保護している。保護管本体1aは、測温
センサーの外周を完全に囲み、耐火物層1bは、保護管本
体1aとの間に間隙を介して、かつ、保護管本体1aの先端
部を露出させた状態で、保護管本体1aの外周を囲んでい
る。さらに、測温センサー、保護管本体1a及び耐火物層
1bは、それらの上端を固定金具５で保持されている。こ
うして構成された本発明の保護管式測温計は、その全体
を溶湯の中に挿入して連続的にまたは断続的に溶湯の温
度変化を計測するものである。FIG. 1 is a cross-sectional view illustrating a basic configuration of the present invention. The protective tube type thermometer of the present invention has a thermocouple 2 built-in Al.
It has a temperature measuring sensor in which an insulating tube 3 such as 2 O 3 is incorporated in a protective tube 4 also made of Al 2 O 3 or the like. The outer periphery of the temperature sensor is protected by a thermocouple protection tube 1 composed of a protection tube main body 1a and a refractory layer 1b. The protective tube main body 1a completely surrounds the outer periphery of the temperature measuring sensor, and the refractory layer 1b is provided with a gap between the protective tube main body 1a and the tip of the protective tube main body 1a exposed. , And surrounds the outer periphery of the protection tube main body 1a. In addition, temperature sensor, protective tube body 1a and refractory layer
1b, the upper ends thereof are held by the fixture 5. The protective tube type thermometer of the present invention configured as described above inserts the whole into the molten metal and continuously or intermittently measures the temperature change of the molten metal.
以下、保護管本体1a及び耐火物層1bからなる熱電対保
護管１についてさらに説明する。本発明において、保護
管本体1aは、非酸化物系セラミックス焼結体からなるも
ので溶湯に対する高温耐食性の点からZrB2（２硼化ジル
コニウム）を主成分とするものが最適である。Hereinafter, the thermocouple protection tube 1 including the protection tube main body 1a and the refractory layer 1b will be further described. In the present invention, the protection tube main body 1a is made of a non-oxide ceramic sintered body, and is most preferably composed mainly of ZrB 2 (zirconium diboride) from the viewpoint of high-temperature corrosion resistance to molten metal.
適切な焼結体は次のようなものである。 A suitable sintered body is as follows.
・組成 Zrの硼化物を主成分とするものであり、特には副成分
として、SiCやBNなどを含むものが好ましく、例えば重
量％でZrB295〜70％、SiC1〜15％、BN4〜29％などのも
のがそれである。A composition mainly composed of a boride having a composition of Zr, and particularly preferably a composition containing SiC or BN as an accessory component. For example, 95 to 70% by weight of ZrB 2, 1 to 15% of SiC, and 4 to 29 of BN. Something like% is that.
・物 性 嵩比重 3.0〜6.0 抗折強度 10Kg/mm2以上 熱膨張率 0.6％以下（1000℃） 比抵抗 10-1Ωcm以上（1500℃） 耐熱衝撃性（△Ｔ） 250〜1000℃ なお、耐熱衝撃性とは電気炉中で各温度に５分間急熱
し水中に急冷した試料の曲げ強度を測定し、強度が急激
に低下した試料の処理温度を示すもので（△Ｔ℃）で表
わす。- product of bulk density 3.0 to 6.0 bending strength 10 Kg / mm 2 or more thermal expansion of 0.6% or less (1000 ° C.) resistivity 10 -1 [Omega] cm or higher (1500 ° C.) thermal shock resistance (△ T) 250~1000 ℃ Incidentally, The thermal shock resistance is obtained by measuring the bending strength of a sample quenched in an electric furnace for 5 minutes at each temperature and quenched in water, and indicates the processing temperature of the sample whose strength has sharply decreased, and is represented by (ΔT ° C.).
比抵抗は、４端子法で高温で測定した値を示す。（Ω
cm,1500℃） 本発明における非酸化物系セラミックス焼結体として
は、このZrB2系のほか、TiB2系、サイアロン系なども使
用可能であるが、ZrB2に比べ高温でのスラグや溶湯に対
する耐食性が低く、TiB2では耐酸化性が悪くなるなどの
点で劣るものであることは否めない。The specific resistance indicates a value measured at a high temperature by a four-terminal method. (Ω
cm, 1500 ° C) As the non-oxide ceramic sintered body in the present invention, in addition to this ZrB 2 system, TiB 2 system and sialon system can be used, but slag and molten metal at a higher temperature than ZrB 2 can be used. It is undeniable that TiB 2 is inferior in that it has low corrosion resistance and the oxidation resistance is poor.
次に保護管本体の外面に配置されている耐火物層1bに
ついて説明する。前述のごとく、ZrB2質などの非酸化物
系セラミックスからなる保護管本体1aは、溶湯に投入
し、温度上昇、下降を繰り返す場合特に高温域からの温
度降下時しばしば500〜600℃の領域で本体1aのセラミッ
クス内部の組織に微細な亀裂が発生しそれが顕著な場合
にはセラミックス全体の割れに至ることがある。この原
因は明らかでないが、熱膨張率、酸化特性、ヤング率な
どの急激な変化や熱応力によるものと思われる。しかる
に高炉や連続鋳造設備において溶銑、溶鋼の測温をする
場合、１タップの出銑毎１キャストの鋳造毎に測温を中
断することになり、硼化物系セラミックスを用いた保護
管の場合その侵食量より早い時期に保護管が割損する場
合が多い。Next, the refractory layer 1b disposed on the outer surface of the protection tube main body will be described. As described above, the protective tube main body 1a made of non-oxide ceramics such as ZrB 2 is poured into the molten metal, and when the temperature is repeatedly increased and decreased, particularly when the temperature is decreased from a high temperature region, the temperature is often in the range of 500 to 600 ° C. Fine cracks are generated in the structure inside the ceramics of the main body 1a, and when the cracks are remarkable, the whole ceramics may be cracked. Although the cause is not clear, it is thought to be due to rapid changes in thermal expansion coefficient, oxidation characteristics, Young's modulus, etc., and thermal stress. However, when measuring the temperature of hot metal or molten steel in a blast furnace or continuous casting facility, the temperature measurement must be interrupted for each tapping of one tap and for each cast cast. The protective tube often breaks earlier than the amount of erosion.
本発明はこれを防止するために該保護管本体1aの外部
にAl2O3−C,ZrO2−Ｃなどの耐熱衝撃性、高耐食性、断
熱性及び機械的強度のある耐火物層1bを配し、断続的な
温度上昇下降を繰り返しても保護管本体1aが割損するこ
となく安定して測温できるようにしたものである。According to the present invention, in order to prevent this, a refractory layer 1b having heat shock resistance, high corrosion resistance, heat insulation and mechanical strength such as Al 2 O 3 —C, ZrO 2 —C is provided outside the protective tube main body 1a. In this arrangement, the temperature of the protection tube main body 1a can be stably measured without breaking even if the temperature is repeatedly increased and decreased intermittently.
この耐火物層1bの本体1aへの配し方についてはどのよ
うな手段を用いてもよいが、図面では本体1aを取付けて
いる固定金具５に取付けられており本体1aとは接触して
いない構造となっている。この保護管１が溶湯の中に投
入された場合、また高温から取り出された場合（１タッ
プの出銑毎または１キャストの鋳造毎）この耐火物層1b
が熱衝撃性の緩和となり、冷却時に本体1aが急冷される
ことなく耐火物層1bが保存し割損を防止する。又、耐火
物層1bは本体1aと接触していないために投入時引出時の
機械的衝撃のクッション材にもなり本体1aを保護され
る。さらにこの耐火物層1bは溶湯中に投入された場合あ
る程度の耐食性を保持しつつ、溶鋼やスラグを付着しや
すくこの付着層が本体1aの保護コートを形成することに
なり断続的に使用される場合の熱衝撃の緩和層となる。Any method may be used for disposing the refractory layer 1b on the main body 1a. However, in the drawing, the refractory layer 1b is attached to the fixture 5 to which the main body 1a is attached, and does not contact the main body 1a. It has a structure. When the protective tube 1 is put into the molten metal, or when it is taken out from a high temperature (for each tapping of one tap or each casting of one cast), the refractory layer 1b
The thermal shock resistance is alleviated, and the refractory layer 1b is preserved without cooling the main body 1a during cooling, thereby preventing breakage. Further, since the refractory layer 1b is not in contact with the main body 1a, the refractory layer 1b also serves as a cushioning material for a mechanical shock at the time of insertion and withdrawal, thereby protecting the main body 1a. In addition, this refractory layer 1b is easily used to adhere molten steel and slag while maintaining a certain degree of corrosion resistance when put into the molten metal, and this adhered layer forms a protective coat of the main body 1a and is used intermittently. In this case, it becomes a thermal shock relaxation layer.
そしてこの耐火物層1bは煉瓦的組織を有するカーボン
を配合した耐熱衝撃性、耐食性、機械的強度、断熱性の
あるAl2O3−ＣやZrO2−Ｃ質の耐火物が好ましい。適切
な耐火物の例は次のようなものである。The refractory layer 1b is preferably made of Al 2 O 3 —C or ZrO 2 —C refractories having a thermal shock resistance, corrosion resistance, mechanical strength, and heat insulating properties containing carbon having a brick structure. Examples of suitable refractories are:
・組成 ZrO2やAl2O3を主成分とし、耐熱衝撃性、耐食性付与
のためにカーボンを含むもの例えばAl2O3又はZrO260〜9
5％、C40〜５％等のもの。- The composition ZrO 2, Al 2 O 3, or the as a main component, thermal shock resistance, those containing carbon for corrosion resistance imparting, for example, Al 2 O 3 or ZrO 2 60-9
5%, C40-5% etc.
・物 性 嵩比重 2.5〜3.5g/cm2 曲げ強度 80〜250kg/cm2（at.1400℃） 熱伝導率 10〜15Kcal/m.h.℃ 耐熱衝撃性 △Ｔ≧1000℃ 熱膨張率 0.5〜0.8％（at.1000℃） また、耐火物層1bは、厚みとして５〜50mm程度が適当
であり、さらに保護管本体1aの外表面への配し方につい
ては、好ましくは保護管本体の長さ方向ほぼ全長とする
ことであるが、先端部は、保護管本体1aの先端が露出す
るように開口させて、熱電対２の応答速度、精度を向上
させる。・ Physical properties Bulk specific gravity 2.5-3.5g / cm 2 Flexural strength 80-250kg / cm 2 (at.1400 ℃) Thermal conductivity 10-15Kcal / mh ℃ Thermal shock resistance △ T ≧ 1000 ℃ Thermal expansion coefficient 0.5-0.8% (At. 1000 ° C.) The thickness of the refractory layer 1b is suitably about 5 to 50 mm, and the arrangement on the outer surface of the protective tube main body 1a is preferably in the longitudinal direction of the protective tube main body. Although the length is set to be substantially the entire length, the distal end portion is opened so that the distal end of the protective tube main body 1a is exposed to improve the response speed and accuracy of the thermocouple 2.
具体的には上記の組成、物性を有する耐火物1bを本体
1aの取付け金具にネジ止めして固定し、本体1aと耐火物
層1bとの間は一体化せずゆるい接触又は間隙を設けてお
くことが望ましい態様である。なぜならこの間隙が断熱
層となり、また一体化している場合、両者の熱膨張に起
因する熱応力の発生もないためである。Specifically, the refractory 1b having the above composition and physical properties
In this embodiment, it is desirable that the main body 1a and the refractory layer 1b are not integrated with each other, but are provided with a loose contact or a gap. This is because, when the gap serves as a heat insulating layer and is integrated, there is no generation of thermal stress due to thermal expansion of both.
本発明の方法を用いれば、断続的な測温においても保
護管の早期損傷が発生せず、侵食により保護管の寿命が
尽きるまで長時間にわたり測温することが可能となる。According to the method of the present invention, even if the temperature is intermittently measured, the protective tube is not damaged at an early stage, and the temperature can be measured for a long time until the life of the protective tube has expired due to erosion.
［実施例］ ZrB2粉末（１μ以下純度99％以上）にBN粉末（１μ以
下純度99％以上）を重量％で10％添加し、SiCボールで
ポットミルを用いエタノール溶媒で３日間粉砕し取出し
後、有機バインダーを添加しスプレイドライヤーで造粒
した。又、同様にZrB2粉末をSiCボールを用い粉砕し造
粒して粉末を得た。この粉末を用いラバープレスにより
2000kg/cm2で成形し、Ar雰囲気下で2100℃×3hr焼成
し、内径15φ、外径25φ、長さ850mmlの保護管本体を製
作した。それぞれの焼結体の分析値は重量％でZrB285
％,BN10％,SiC5％およびZrB295％,SiC5％であった。[Example] 10% by weight of BN powder (less than 1μ purity 99% or more) was added to ZrB 2 powder (less than 99% purity 1μ), pulverized with ethanol solvent using a pot mill with SiC balls for 3 days and taken out. , An organic binder was added, and the mixture was granulated with a spray drier. Similarly, ZrB 2 powder was pulverized using SiC balls and granulated to obtain a powder. Using a rubber press with this powder
It was molded at 2000 kg / cm 2 and fired at 2100 ° C. for 3 hours in an Ar atmosphere to produce a protective tube body having an inner diameter of 15φ, an outer diameter of 25φ, and a length of 850 mml. The analysis value of each sintered body was ZrB 2 85
%, BN 10%, SiC 5% and ZrB 2 95%, SiC 5%.
この保護管を取付け金具に装着し保護管の外側にはAl
2O3−Ｃ質ロングストッパーの使用済み廃材を先端のみ
切断し、取付け金具にネジ固定した。このAl2O3−Ｃ質
耐火物層の寸法は外径140φ、内径50φ、長さ650mmlの
ものを用いた。ネジはロングストッパーとしてもともと
ネジ切りしてあるためそのネジ寸法に合わせて金具を作
った。この保護管の内部に熱電対JIS−Ｂ（Pt/Rh6〜30
％）に絶縁管を配しAl2O3保護管に内装したものを組込
み保護管式測温計を製作した。なお、Al2O3−Ｃの分析
値は重量％でAl2O355％、C30％、SiC10％であった。This protection tube is attached to the mounting bracket, and Al
The used waste material of the 2 O 3 -C quality long stopper was cut only at the tip, and fixed to the mounting bracket with screws. The dimensions of the Al 2 O 3 -C refractory layer were an outer diameter of 140 φ, an inner diameter of 50 φ, and a length of 650 mml. Since the screws were originally threaded as long stoppers, fittings were made according to the screw dimensions. Thermocouple JIS-B (Pt / Rh6 ~ 30
%), An insulating tube was provided, and the inside of an Al 2 O 3 protective tube was incorporated to produce a protective tube type thermometer. Incidentally, the analysis value of the Al 2 O 3 -C is Al 2 O 3 55% by weight%, C30%, was SiC 10%.
この組合せの保護管式測温計を用い40tonのタンディ
ッシュ鍋で1550℃の溶鋼中に浸漬し、測温を行なった。
測温は各25回鋳造時毎、保護管は温度上昇下降を繰り返
し行なわれ、各々合計85時間の間正常に測温ができた。
測温85時間終了後取り出して保護管を調べたが、ZrB2保
護管にはスラグ地金の付着したコートが覆われていた。Using a protective tube type thermometer of this combination, the sample was immersed in molten steel at 1550 ° C. in a 40-ton tundish pan to measure the temperature.
The temperature was measured 25 times each time casting was performed, and the temperature of the protective tube was repeatedly increased and decreased, and the temperature was measured normally for a total of 85 hours.
After the temperature measurement was completed for 85 hours, the protective tube was taken out and examined. As a result, the protective tube with ZrB 2 was covered with a coat of slag metal.
この保護管を半分に切断して断面や内面を調べたが亀
裂は認められずZrB2の保護管の外表面の侵食量も1.5〜2
mm程度の軽微であった。The protective tube was cut in half and its cross section and inner surface were examined.No cracks were observed and the amount of erosion on the outer surface of the protective tube of ZrB 2 was 1.5 to 2
It was slight of about mm.
これに対しZrB2質保護管の外部にAl2O3−Ｃ質耐火物
層を配しなかった保護管を同様に使用し断続的測温を行
なったところ、１回の温度上昇下降における測温で約３
〜４時間の測温終了後早くも保護管に損傷を来し、測温
不能となった。取出して調査した結果、保護管の外表面
に発生した亀裂を通じて溶鋼が侵入していた。又半分に
切断して、断面を調べたところ微細な亀裂が無数認めら
れた。On the other hand, intermittent temperature measurement was performed using a protective tube without an Al 2 O 3 -C refractory layer outside the ZrB 2 protective tube in the same manner. About 3
The protective tube was damaged as soon as the temperature measurement was completed for about 4 hours, and the temperature could not be measured. As a result of taking out and investigating, it was found that molten steel had penetrated through cracks generated on the outer surface of the protective tube. When cut in half and the cross section was examined, countless fine cracks were found.
［発明の効果］ 本発明の方法によれば長時間安定して溶融金属の断続
的測温が可能となるため測温コストが低減でき、温度計
の信頼性が大幅に向上する。これを使用することによっ
て自動化ラインによる省力化や操業・品質の管理精度向
上による操業安定化、品質向上、生産向上等に役立ちそ
の工業的価値は多大である。[Effects of the Invention] According to the method of the present invention, it is possible to stably measure the temperature of the molten metal intermittently for a long time, so that the temperature measurement cost can be reduced and the reliability of the thermometer is greatly improved. By using this, it is useful for labor saving by an automated line and operation stability, quality improvement, production improvement, etc. by improving operation and quality control accuracy, and its industrial value is enormous.
第１図は、本発明の基本的構造を説明する一部切り欠い
た縦断面説明図である。 図面にて 1:熱電対保護管部分 1a:保護管本体 1b:耐火物層 2:熱電対 3:Al2O3絶縁管 4:Al2O3保護管 5:固定金具FIG. 1 is a partially cutaway longitudinal sectional view illustrating a basic structure of the present invention. In the drawing 1: Thermocouple protection tube part 1a: Protection tube body 1b: Refractory layer 2: Thermocouple 3: Al 2 O 3 insulating tube 4: Al 2 O 3 protection tube 5: Fixing bracket
───────────────────────────────────────────────────── フロントページの続き (72)発明者 村山 幸雄 愛知県東海市東海町５―３ 新日本製鐵 株式會社名古屋製鐵所内 (72)発明者 大槌 幸男 愛知県東海市東海町５―３ 新日本製鐵 株式會社名古屋製鐵所内 (72)発明者 木田 音次郎 神奈川県横浜市緑区十日市場1686―１ (72)発明者 武次 浩 兵庫県高砂市緑丘２―４―10―106 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yukio Murayama 5-3 Tokaicho, Tokai City, Aichi Prefecture Inside Nippon Steel Corporation Nagoya Works (72) Inventor Yukio Otsuchi 5-3 Tokaicho, Tokai City, Aichi Prefecture New Nippon Steel Corporation Nagoya Works (72) Inventor Koji Otojiro 166-1-1, Tokaichiba, Midori-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Hiroshi Takeji 2-4-10-106, Midorioka, Takasago-shi, Hyogo Prefecture
Claims (1)
センサーの外周を囲む、非酸化物を主成分とするセラミ
ックスからなる保護管本体と、この保護管本体の先端部
を除いた外周を所定の間隙を介して囲む耐火物層とを備
えていることを特徴とする保護管式測温計。1. A temperature measuring sensor having a thermocouple, a protective tube main body surrounding a periphery of the temperature measuring sensor and made of ceramics mainly composed of non-oxide, and an outer periphery of the protective tube main body excluding a tip portion. And a refractory layer surrounding the refractory layer via a predetermined gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63118975A JP2596789B2 (en) | 1988-05-16 | 1988-05-16 | Protection tube type thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63118975A JP2596789B2 (en) | 1988-05-16 | 1988-05-16 | Protection tube type thermometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01288741A JPH01288741A (en) | 1989-11-21 |
| JP2596789B2 true JP2596789B2 (en) | 1997-04-02 |
Family
ID=14749915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63118975A Expired - Fee Related JP2596789B2 (en) | 1988-05-16 | 1988-05-16 | Protection tube type thermometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2596789B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007057528A (en) * | 2005-08-24 | 2007-03-08 | Heraeus Electro-Nite Internatl Nv | Temperature measuring instrument for molten metal |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5180228A (en) * | 1989-09-18 | 1993-01-19 | Asahi Glass Company Ltd. | Radiation thermometer for molten iron and method for measuring the temperature of molten iron |
| EP0454846B1 (en) * | 1989-11-22 | 1996-09-11 | Nippon Steel Corporation | Thermocouple-type temperature sensor and method of measuring temperature of molten steel |
| JPH075049A (en) * | 1991-02-22 | 1995-01-10 | Akechi Ceramics Kk | Continuous thermometer for molten metal |
| US7080941B1 (en) * | 2001-11-13 | 2006-07-25 | Lam Research Corporation | Temperature sensing system for temperature measurement in a high radio frequency environment |
| JP5155246B2 (en) * | 2008-05-09 | 2013-03-06 | 日本特殊陶業株式会社 | Temperature sensor |
| JP5795568B2 (en) * | 2012-12-17 | 2015-10-14 | 鈴鹿エンヂニヤリング株式会社 | Mounting structure of thermocouple temperature detector for kneading machine for high viscosity kneading materials |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JPS62163941A (en) * | 1986-01-16 | 1987-07-20 | Toshiba Ceramics Co Ltd | Continuous temperature sensor for molten metal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0339701Y2 (en) * | 1985-11-19 | 1991-08-21 |
-
1988
- 1988-05-16 JP JP63118975A patent/JP2596789B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JPS62163941A (en) * | 1986-01-16 | 1987-07-20 | Toshiba Ceramics Co Ltd | Continuous temperature sensor for molten metal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007057528A (en) * | 2005-08-24 | 2007-03-08 | Heraeus Electro-Nite Internatl Nv | Temperature measuring instrument for molten metal |
| US8033717B2 (en) | 2005-08-24 | 2011-10-11 | Heraeus Electro-Nite International N.V. | Device for measuring temperature in molten metals |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01288741A (en) | 1989-11-21 |
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