JP2021117167A - Temperature measuring probe - Google Patents

Temperature measuring probe Download PDF

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JP2021117167A
JP2021117167A JP2020012062A JP2020012062A JP2021117167A JP 2021117167 A JP2021117167 A JP 2021117167A JP 2020012062 A JP2020012062 A JP 2020012062A JP 2020012062 A JP2020012062 A JP 2020012062A JP 2021117167 A JP2021117167 A JP 2021117167A
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temperature measuring
end side
tube
measuring probe
small tube
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JP7275443B2 (en
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克清 古川
Katsukiyo Furukawa
克清 古川
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TYK Corp
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Abstract

To provide a temperature measuring probe that is longer in an axial direction.SOLUTION: A temperature measuring probe 1 of the present invention includes: an internal protective tube 3 formed of a ceramic-based burned material; a temperature indicator 2 having a temperature measuring unit 20 for measuring the temperature of a temperature measurement object; and an external protective tube 4 formed of ceramic. The internal protective tube 3 includes a plurality of small tube members 31 and 32 arranged in an axial direction and engagement means 33 for making two adjacent small tube members 31 and 32 engaged with each other.SELECTED DRAWING: Figure 1

Description

本発明は、測温対象物の温度を測定する測温プローブに関する。 The present invention relates to a temperature measuring probe for measuring the temperature of a temperature measuring object.

溶鋼（金属溶湯）のような高温の測温対象物の温度の測定には、測温プローブが用いられる。測温プローブは、例えば、特許文献１に記載されている。 A temperature measuring probe is used to measure the temperature of a high temperature temperature measuring object such as molten steel (metal molten metal). The temperature measuring probe is described in Patent Document 1, for example.

特許文献１に記載の測温プローブは、測温対象物に接触する有底状の先端部及び中空室を形成する筒部をもつ内部保護管と、中空室に挿入され測温対象物の温度を測定する熱電対要素と、筒部の外周壁面を被覆する保護スリーブ（外部保護管）とを有する。この測温プローブは、溶鋼等の測温対象物に先端部を接触（挿入・浸漬）することで、内部保護管の先端部を介して熱電対要素で温度を測定する。
近年、溶鋼（金属溶湯）の湯面（スラグライン）から、より深い位置における温度を測定することが求められている。すなわち、軸方向の長さが長い測温プローブが求められている。 The temperature measuring probe described in Patent Document 1 has an internal protective tube having a bottomed tip portion in contact with the temperature measuring object and a tubular portion forming a hollow chamber, and the temperature of the temperature measuring object inserted into the hollow chamber. It has a thermocouple element for measuring the temperature and a protective sleeve (external protective tube) for covering the outer peripheral wall surface of the tubular portion. This temperature measuring probe measures the temperature with a thermocouple element via the tip of the internal protection tube by contacting (inserting / immersing) the tip with a temperature measuring object such as molten steel.
In recent years, it has been required to measure the temperature at a deeper position from the molten metal (slag line) of molten steel (metal molten metal). That is, there is a demand for a temperature measuring probe having a long axial length.

しかし、軸方向の長さが長い測温プローブは、その製造が困難となるという問題があった。具体的には、測温プローブの内部保護管は、加熱炉で焼成・焼結して製造される。この製造方法では、加熱炉のサイズより長い内部保護管の製造ができなかった。内部保護管の製造のためだけに大きな加熱炉を製造することは、コストの大幅な上昇を招く。 However, there is a problem that it is difficult to manufacture a temperature measuring probe having a long axial length. Specifically, the internal protection tube of the temperature measuring probe is manufactured by firing and sintering in a heating furnace. With this manufacturing method, it was not possible to manufacture an internal protection tube longer than the size of the heating furnace. Manufacturing a large heating furnace solely for the manufacture of internal protective tubes leads to a significant increase in cost.

特開２０１１−１６９７９８号公報Japanese Unexamined Patent Publication No. 2011-169798

本発明は上記実情に鑑みてなされたものであり、コストの増加を抑えつつ、軸方向の長さが長い測温プローブを提供することを課題とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a temperature measuring probe having a long axial length while suppressing an increase in cost.

上記課題を解決する本発明の測温プローブは、先端部が閉塞した有底筒状を有し、焼成体で形成された内部保護管と、前記内部保護管の内部に配された、測温対象物の温度を測定する測温部を有する温度計と、前記内部保護管を内部に配する筒状を有し、セラミックスで形成された外部保護管と、を有し、前記内部保護管は、軸方向に配列した複数の小管部材と、隣接した２つの前記小管部材を一体に係合する係合手段と、を有することを特徴とする。 The temperature measuring probe of the present invention that solves the above problems has a bottomed tubular shape with a closed tip, and has an internal protective tube formed of a fired body and a temperature measuring tube arranged inside the internal protective tube. It has a thermometer having a temperature measuring unit for measuring the temperature of an object, and an external protective tube having a tubular shape in which the internal protective tube is arranged and made of ceramics. , A plurality of small tube members arranged in the axial direction, and an engaging means for integrally engaging the two adjacent small tube members.

本発明の測温プローブは、金属とセラミックスとを含有する材料等よりなる焼成体で形成された内部保護管が複数の小管部材を係合手段で係合して形成される。この構成によると、長さが過剰に長い小管部材を用いることなく、全体の長さが長い内部保護管を形成できる。この結果、本発明の測温プローブは、コストの増加を抑えつつ、軸方向の長さが長い測温プローブとなる効果を発揮する。 The temperature measuring probe of the present invention is formed by engaging an internal protective tube made of a fired body made of a material containing metal and ceramics with a plurality of small tube members by engaging means. According to this configuration, it is possible to form an internal protective tube having a long overall length without using a small tube member having an excessively long length. As a result, the temperature measuring probe of the present invention exhibits the effect of becoming a temperature measuring probe having a long axial length while suppressing an increase in cost.

本発明の測温プローブは、前記外部保護管が、軸方向に配列した複数の管部材と、隣接した２つの前記管部材を接合する接合材と、を有し、２つの前記管部材が接合した接合部は、前記測温プローブにおける軸方向での位置が、２つの前記小管部材が係合した係合部と異なっていることが好ましい。この構成によると、測温プローブの先端部を測温対象物（金属溶湯）に浸漬してその温度を測定するときに、金属溶湯の流れを受けても、管部材や小管部材の過剰な変位が抑えられ、測温プローブの損傷（折損）が抑えられる。 In the temperature measuring probe of the present invention, the external protective tube has a plurality of tube members arranged in the axial direction and a joining material for joining two adjacent tube members, and the two tube members are joined. It is preferable that the joint portion formed is different in the axial position of the temperature measuring probe from the engaging portion in which the two small tube members are engaged. According to this configuration, when the tip of the temperature measuring probe is immersed in a temperature measuring object (melted metal) and the temperature is measured, excessive displacement of the tube member and the small tube member even if the molten metal is received. Is suppressed, and damage (breakage) of the temperature measuring probe is suppressed.

実施形態１の測温プローブの構成を示す断面図である。It is sectional drawing which shows the structure of the temperature measuring probe of Embodiment 1. FIG. 図１中のＩＩ−ＩＩ線での断面を示した断面図である。It is sectional drawing which showed the cross section in line II-II in FIG. 実施形態１の測温プローブの内部保護管の先端部近傍の構成を示した拡大断面図である。FIG. 5 is an enlarged cross-sectional view showing a configuration in the vicinity of the tip of the internal protection tube of the temperature measuring probe of the first embodiment. 実施形態１の測温プローブの内部保護管の係合部近傍の構成を示した拡大断面図である。FIG. 5 is an enlarged cross-sectional view showing a configuration in the vicinity of an engaging portion of an internal protection tube of the temperature measuring probe of the first embodiment. 実施形態１の変形形態の測温プローブの内部保護管の係合部近傍の構成を示した拡大断面図である。It is an enlarged cross-sectional view which showed the structure of the vicinity of the engaging part of the internal protection tube of the temperature measuring probe of the modified form of Embodiment 1. FIG. 実施形態２の測温プローブの内部保護管の係合部近傍の構成を示した拡大断面図である。It is an enlarged cross-sectional view which showed the structure of the vicinity of the engaging part of the internal protection tube of the temperature measuring probe of Embodiment 2. 図６中のＶＩＩ−ＶＩＩ線での断面を示した断面図である。It is sectional drawing which showed the cross section in line VII-VII in FIG. 実施形態３の測温プローブの内部保護管の係合部近傍の構成を示した拡大断面図である。It is an enlarged cross-sectional view which showed the structure of the vicinity of the engaging part of the internal protection tube of the temperature measuring probe of Embodiment 3. 実施形態４の測温プローブの構成を示した拡大断面図である。It is an enlarged cross-sectional view which showed the structure of the temperature measuring probe of Embodiment 4.

以下、本発明を実施するための形態について図面を参照しつつ説明する。なお、以下の各形態は、本発明を実施するための具体的な例であり、本発明が以下の各形態のみに限定されるものではない。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The following embodiments are specific examples for carrying out the present invention, and the present invention is not limited to the following embodiments.

［実施形態１］
本形態の測温プローブ１は、熱電対２，内部保護管３，外部保護管４，保護キャスタブル５，フランジ６を有する。本形態の測温プローブ１は、その構成を図１〜図４に示す。図１は、本形態の測温プローブ１の構成を示した断面図である。図２は、図１中のＩＩ−ＩＩ線での断面を示した断面図である。図３は、内部保護管３の先端部３０（熱電対２の測温部２０）近傍の構成を示した拡大断面図である。図４は、内部保護管３の係合部近傍の構成を示した拡大断面図である。 [Embodiment 1]
The temperature measuring probe 1 of this embodiment has a thermocouple 2, an internal protective tube 3, an external protective tube 4, a protective castable 5, and a flange 6. The configuration of the temperature measuring probe 1 of this embodiment is shown in FIGS. 1 to 4. FIG. 1 is a cross-sectional view showing the configuration of the temperature measuring probe 1 of the present embodiment. FIG. 2 is a cross-sectional view showing a cross section taken along line II-II in FIG. FIG. 3 is an enlarged cross-sectional view showing a configuration in the vicinity of the tip portion 30 (temperature measuring portion 20 of the thermocouple 2) of the internal protection tube 3. FIG. 4 is an enlarged cross-sectional view showing a configuration in the vicinity of the engaging portion of the internal protection tube 3.

本形態の測温プローブ１は、測温対象物としての金属溶湯（例えば、溶鋼）に先端部３０を浸漬し、金属溶湯の温度を測定する。例えば、金属溶湯を貯留する容器（例えば、タンディッシュ）の蓋に開口した開口部に測温プローブ１の先端側を挿入し、金属溶湯に先端部３０を浸漬して測温する。 In the temperature measuring probe 1 of this embodiment, the tip portion 30 is immersed in a molten metal (for example, molten steel) as a temperature measuring object, and the temperature of the molten metal is measured. For example, the tip end side of the temperature measuring probe 1 is inserted into an opening opened in the lid of a container (for example, a tundish) for storing the molten metal, and the tip 30 is immersed in the molten metal to measure the temperature.

本形態及び他の形態において、測温対象物（金属溶湯）に浸漬する先端部３０側を先端側とし、プローブ頭部２３側を基端側とする。軸方向とは、測温プローブ１（並びに内部保護管３及び外部保護管４）の延びている方向（具体的には、図１の上下方向）である。 In this embodiment and other embodiments, the tip portion 30 side to be immersed in the temperature measuring object (metal molten metal) is the tip end side, and the probe head 23 side is the base end side. The axial direction is the extending direction (specifically, the vertical direction in FIG. 1) of the temperature measuring probe 1 (and the internal protection tube 3 and the external protection tube 4).

（熱電対）
熱電対２は、測温対象物（金属溶湯）の温度を測定する測温部２０を有する温度計である。熱電対２は、測温対象物（金属溶湯）の温度域で温度を測定できる熱電対から適宜選択される。金属溶湯の温度を測定可能な熱電対２としては、例えば、白金ロジウム型，タングステンレニウム型，イリジウムロジウム型，アルメルクロメル型，ニッケルモリブデン型，ナイクロシル型等の熱電対を挙げることができる。 (thermocouple)
The thermocouple 2 is a thermometer having a temperature measuring unit 20 for measuring the temperature of a temperature measuring object (melted metal). The thermocouple 2 is appropriately selected from thermocouples capable of measuring the temperature in the temperature range of the object to be measured (molten metal). Examples of the thermocouple 2 capable of measuring the temperature of the molten metal include a thermocouple such as a platinum rhodium type, a tungsten rhenium type, an iridium rhodium type, an alumel chromel type, a nickel molybdenum type, and a nycrosyl type.

本形態の熱電対２は、白金ロジウム型の熱電対である。白金ロジウム型の熱電対は、熱電対２の＋側が白金ロジウム合金の導線２Ａよりなり、−側が白金ロジウム合金又は白金の導線２Ｂよりなり、２本の導線２Ａ，２Ｂの接合点が測温部２０となる熱電対である。白金ロジウム型の熱電対の具体的な組成及び構成は、従来公知の組成及び構成とすることができる。 The thermocouple 2 of this embodiment is a platinum rhodium type thermocouple. In the platinum rhodium type thermocouple, the + side of the thermocouple 2 is composed of the platinum rhodium alloy conductor 2A, the-side is composed of the platinum rhodium alloy or platinum conductor 2B, and the junction of the two conductors 2A and 2B is the temperature measuring part. It is a thermocouple of 20. The specific composition and composition of the platinum rhodium type thermocouple can be a conventionally known composition and composition.

熱電対２は、測温部２０が内部保護管３の先端部３０の内周面３ａに当接して組み付けられる。熱電対２（を構成する導線２Ａ，２Ｂ）の基端部は、プローブ頭部２３（ターミナルヘッドとも称される）を介して指示計（図示せず）に接続されている。熱電対２は、図２〜図３に示したように、互いに独立して軸方向に並走する一対の通孔２２（２２Ａ，２２Ｂ）を有する略円柱状の絶縁管２１の一方の通孔２２Ａに＋側の導線２Ａを、他方の通孔２２Ｂに−側の導線２Ｂを挿入し、かつ各導線の２Ａ，２Ｂの先端部が絶縁管２１の先端側の端面２１ａから突出した状態で組み付けられている。このとき、各導線２Ａ，２Ｂの先端部が接合した測温部２０は、内部保護管３の先端部３０の内周面３ａに当接している。なお、測温部２０は、内部保護管３の内周面３ａに当接せず、内周面３ａとの間に微少な間隔を隔てていてもよい。 The thermocouple 2 is assembled with the temperature measuring unit 20 in contact with the inner peripheral surface 3a of the tip portion 30 of the internal protection tube 3. The base end portion of the thermocouple 2 (the conducting wires 2A and 2B constituting the thermocouple 2) is connected to an indicator (not shown) via a probe head 23 (also referred to as a terminal head). As shown in FIGS. 2 to 3, the thermocouple 2 is one through hole of a substantially columnar insulating tube 21 having a pair of through holes 22 (22A, 22B) running in parallel in the axial direction independently of each other. The + side conductor 2A is inserted into 22A, the minus side conductor 2B is inserted into the other through hole 22B, and the tips of the conductors 2A and 2B are assembled in a state of protruding from the end surface 21a on the tip side of the insulating tube 21. Has been done. At this time, the temperature measuring portion 20 to which the tip portions of the conducting wires 2A and 2B are joined is in contact with the inner peripheral surface 3a of the tip portion 30 of the internal protection tube 3. The temperature measuring unit 20 may not come into contact with the inner peripheral surface 3a of the internal protection tube 3 and may be separated from the inner peripheral surface 3a by a small distance.

絶縁管２１は、熱電対２（の各導線２Ａ，２Ｂ）と内部保護管３とが電気的に接触することを抑えることができる絶縁性の材料で形成される。絶縁性の材料としては、アルミナ，マグネシア，ムライト等のセラミックスをあげることができる。本形態の絶縁管２１は、アルミナセラミックスよりなる。 The insulating tube 21 is formed of an insulating material capable of suppressing electrical contact between the thermocouple 2 (each of the conducting wires 2A and 2B) and the internal protective tube 3. Examples of the insulating material include ceramics such as alumina, magnesia, and mullite. The insulating tube 21 of this embodiment is made of alumina ceramics.

（内部保護管）
内部保護管３は、その内部に熱電対２を配することができる、先端が閉じた有底筒状をなしている部材である。内部保護管３は、図１及び図４に示すように、先端側小管部材３１，基端側小管部材３２及び係合筒３３からなる。先端側小管部材３１及び基端側小管部材３２は、請求項の小管部材に相当する。内部保護管３は、全体の形状が、先端部３０が滑らかな湾曲形状、より具体的には略半球形状をなすように閉じた形状の有底円筒形状の部材である。
熱電対２は、内部保護管３の内部に配され、測温部２０以外は内部保護管３に接触しない。 (Internal protection tube)
The internal protection tube 3 is a member having a bottomed tubular shape with a closed tip on which a thermocouple 2 can be arranged. As shown in FIGS. 1 and 4, the internal protection tube 3 includes a tip end side small tube member 31, a proximal end side small tube member 32, and an engaging cylinder 33. The tip side small tube member 31 and the proximal end side small tube member 32 correspond to the small tube member of the claim. The internal protective tube 3 is a bottomed cylindrical member having an overall shape that is closed so that the tip portion 30 has a smooth curved shape, more specifically, a substantially hemispherical shape.
The thermocouple 2 is arranged inside the internal protection tube 3, and does not come into contact with the internal protection tube 3 except for the temperature measuring unit 20.

先端側小管部材３１は、内部保護管３の先端部３０を形成する部材であり、先端部３０が閉じた円筒形状の部材である。先端側小管部材３１は、先端部３０が上記の略半球状をなし、その基端側は円筒形状をなしている。先端側小管部材３１は、基端側の端部の外周面にネジ山が形成された雄ネジ部３１０を有している。先端側小管部材３１は、径方向厚さがほぼ均一な厚さで形成されている。先端側小管部材３１は、基端側の端面が、軸方向に垂直な面に沿うように形成されている。 The tip-side small tube member 31 is a member that forms the tip 30 of the internal protection tube 3, and is a cylindrical member with the tip 30 closed. In the tip side small tube member 31, the tip portion 30 has a substantially hemispherical shape as described above, and the base end side thereof has a cylindrical shape. The tip-side small tube member 31 has a male screw portion 310 in which a thread is formed on the outer peripheral surface of the end portion on the proximal end side. The tip-side small tube member 31 is formed to have a substantially uniform radial thickness. The tip-side small tube member 31 is formed so that the end face on the proximal end side follows a plane perpendicular to the axial direction.

基端側小管部材３２は、内部保護管３の基端側の端部であって、プローブ頭部２３やフランジ６と接続する端部を形成する部材である。基端側小管部材３２は、先端側小管部材３１の先端部３０以外の円筒形状の部分と同径の円筒形状をなしている。基端側小管部材３２は、先端側の端部の外周面にネジ山が形成された雄ネジ部３２０を有している。基端側小管部材３２は、先端側の端面が軸方向に垂直な面に沿って形成されている。先端側小管部材３１の基端側の端面と、基端側小管部材３２の先端側の端面と、が同軸で当接した場合、対向する２つの端面はすき間なく全面で密着する。 The proximal end side small tube member 32 is an end portion on the proximal end side of the internal protection tube 3, and is a member forming an end portion connected to the probe head 23 and the flange 6. The proximal end side capillary member 32 has a cylindrical shape having the same diameter as the cylindrical portion other than the distal end portion 30 of the distal end side capillary member 31. The base end side small tube member 32 has a male screw portion 320 in which a thread is formed on the outer peripheral surface of the end portion on the tip end side. The proximal end side capillary member 32 is formed along a plane whose end surface on the distal end side is perpendicular to the axial direction. When the end face on the base end side of the tip end side small tube member 31 and the end face on the tip end side of the base end side small tube member 32 are coaxially contacted, the two opposite end faces are in close contact with each other on the entire surface without a gap.

係合筒３３は、先端側小管部材３１及び基端側小管部材３２を係合固定する円筒形状の部材である。係合筒３３は、先端側小管部材３１の雄ネジ部３１０及び基端側小管部材３２の雄ネジ部３２０と螺合するネジ山が内周面に形成された雌ネジ部３３０，３３１を有する。係合筒３３は、円筒形状の内周面の全面に（すなわち、係合筒３３の全長にわたって）、雄ネジ部３１０，３２０と螺合するネジ山が形成されている。係合筒３３は、先端側の端部側に先端側小管部材３１の雄ネジ部３１０と螺合するネジ山が形成された雌ネジ部３３０が、基端側の端部側に基端側小管部材３２の雄ネジ部３２０と螺合するネジ山が形成された雌ネジ部３３１が、それぞれ形成されている。雌ネジ部３３０と雌ネジ部３３１のそれぞれは、係合筒３３の軸方向長さの半分の長さで形成されている。 The engaging cylinder 33 is a cylindrical member that engages and fixes the tip end side small tube member 31 and the proximal end side small tube member 32. The engaging cylinder 33 has female threaded portions 330 and 331 having threads formed on the inner peripheral surface to be screwed with the male threaded portion 310 of the tip side small tube member 31 and the male threaded portion 320 of the proximal end side small tube member 32. .. The engaging cylinder 33 has a thread thread that is screwed with the male screw portions 310 and 320 on the entire surface of the inner peripheral surface of the cylindrical shape (that is, over the entire length of the engaging cylinder 33). The engaging cylinder 33 has a female threaded portion 330 having a thread formed on the distal end side to be screwed with the male threaded portion 310 of the distal end side small tube member 31, and has a proximal end side on the proximal end side. A female threaded portion 331 having a thread thread to be screwed with the male threaded portion 320 of the small tube member 32 is formed, respectively. Each of the female threaded portion 330 and the female threaded portion 331 is formed to have a length half the axial length of the engaging cylinder 33.

本形態の内部保護管３は、図４に示すように、係合筒３３の先端側から先端側小管部材３１が、係合筒３３の基端側から基端側小管部材３２が、それぞれ雄ネジ部３１０，３２０と雌ネジ部３３０，３３１とが螺合して組み付けられる。先端側小管部材３１と基端側小管部材３２は、係合筒３３の内部でありかつ軸方向長さの半分の位置で、互いに対向する端面同士が全面で密着して固定される。本形態では、先端側小管部材３１と基端側小管部材３２の端面同士の当接面を係合部３４とする。なお、係合筒３３での係合部３４の軸方向位置は、限定されない。先端側小管部材３１と基端側小管部材３２を係合・固定できる位置であれば、本形態よりも先端側又は基端側に位置していてもよい。
内部保護管３（具体的には、先端側小管部材３１，基端側小管部材３２及び係合筒３３のいずれも）は、焼成体で形成される。焼成体とは、加熱炉で熱処理されてなる材料である。
焼成体は、金属とセラミックスを含有する材料（金属−セラミックス複合材料），Ｓｉ３Ｎ４，サイアロン（シリコン・アルミナ窒化物）の少なくとも１種よりなる。 In the internal protection tube 3 of the present embodiment, as shown in FIG. 4, the tip side small tube member 31 from the tip side of the engaging cylinder 33 and the proximal end side small tube member 32 from the proximal end side of the engaging cylinder 33 are male, respectively. The threaded portions 310 and 320 and the female threaded portions 330 and 331 are screwed and assembled. The tip end side small tube member 31 and the proximal end side small tube member 32 are fixed in close contact with each other on the entire surface at a position inside the engaging cylinder 33 and at a position of half the axial length. In the present embodiment, the contact surface between the end faces of the distal end side small tube member 31 and the proximal end side small tube member 32 is used as the engaging portion 34. The axial position of the engaging portion 34 in the engaging cylinder 33 is not limited. As long as the tip side small tube member 31 and the base end side small tube member 32 can be engaged and fixed, the tip side small tube member 31 and the base end side small tube member 32 may be located on the tip side or the base end side of the present embodiment.
The internal protection tube 3 (specifically, any of the tip end side small tube member 31, the proximal end side small tube member 32, and the engaging cylinder 33) is formed of a fired body. The fired body is a material that has been heat-treated in a heating furnace.
It fired body material containing metal and ceramics (metal - ceramic composite material), Si 3 N 4, comprising at least one sialon (silicon-alumina nitride).

本形態の内部保護管３は、サーメットよりなる。サーメットは、金属とセラミックスを含有する材料（金属−セラミックス複合材料）である。サーメットは、測温プローブ１に用いたときに要求される硬度，温度即答性を満たすことができる材料である。内部保護管３を形成する具体的な材料、すなわちサーメットの組成は、測温対象物の温度域で要求される特性により適宜選択される。 The internal protective tube 3 of this embodiment is made of a cermet. Cermet is a material containing metal and ceramics (metal-ceramic composite material). Cermet is a material that can satisfy the hardness and temperature promptness required when used in the temperature measuring probe 1. The specific material forming the internal protection tube 3, that is, the composition of the cermet, is appropriately selected according to the characteristics required in the temperature range of the temperature-measured object.

サーメット（金属−セラミックス複合材）を形成する金属としては、Ｍｏ，Ｗ，Ｔｉより選ばれる少なくとも１種を用いることが好ましい。サーメットを形成するセラミックスとしては、アルミナ，ジルコニア，マグネシア，スピネル，ムライト，炭化珪素，イットリアより選ばれる少なくとも１種を用いることが好ましい。なお、サーメットを形成する金属及びセラミックスは、これらのみに限定されない。本形態のサーメットは、高い融点と強度を有するＭｏ−ＺｒＯ２系のＭｏ−ＺｒＯ２サーメットである。 As the metal forming the cermet (metal-ceramic composite material), it is preferable to use at least one selected from Mo, W, and Ti. As the ceramics forming the cermet, it is preferable to use at least one selected from alumina, zirconia, magnesia, spinel, mullite, silicon carbide, and yttria. The metals and ceramics that form the cermet are not limited to these. The cermet of this embodiment is a Mo-ZrO 2 system Mo-ZrO 2 cermet having a high melting point and strength.

本形態の内部保護管３を形成するＭｏ−ＺｒＯ２サーメットは、ＭｏとＺｒＯ２との複合材料であり、ＭｏとＺｒＯ２の含有割合が限定されない。ＭｏがＺｒＯ２より多く含有した複合材料であることが好ましく、全体を１００ｍａｓｓ％としたときに、Ｍｏ：ＺｒＯ２が６５〜９０％：３５〜１０％の割合（質量比）で含まれるものであることがより好ましい。 Mo-ZrO 2 cermet to form an inner protective tube 3 in this embodiment is a composite of Mo and ZrO 2, the content of Mo and ZrO 2 is not limited. It is preferable that the composite material contains more Mo than ZrO 2 , and when the whole is 100 mass%, Mo: ZrO 2 is contained in a ratio (mass ratio) of 65 to 90%: 35 to 10%. More preferably.

内部保護管３を形成するサーメットは、強度及び伝熱性に優れることから、緻密体であることが好ましく、気孔率が小さいことが好ましい。ここで、サーメットの気孔率は、測定方法が限定されない。従来の測定装置を用いることができる。本形態では、ＪＩＳ Ｒ ２２０５に準拠して、見かけ密度から気孔率を算出する。サーメットは、気孔率が、０〜５％（すなわち、５％以下）が好ましく、０〜４％（すなわち、４％以下）であることがより好ましく、０〜３％（すなわち、３％以下）であることが更に好ましい。 The cermet forming the internal protective tube 3 is preferably a dense body and preferably has a small porosity because it is excellent in strength and heat transfer. Here, the method of measuring the porosity of cermet is not limited. A conventional measuring device can be used. In this embodiment, the porosity is calculated from the apparent density according to JIS R 2205. The cermet has a porosity of preferably 0 to 5% (ie, 5% or less), more preferably 0 to 4% (ie, 4% or less), and 0 to 3% (ie, 3% or less). Is more preferable.

内部保護管３は、先端側小管部材３１，基端側小管部材３２及び係合筒３３が全て同じ材料よりなる。内部保護管３が１つの材料で形成されることで、内部保護管３が全体として同一の特性を有するものとなる。特に、熱膨張係数が同じ材料であることで、熱膨張の差による損傷が抑えられる。 In the internal protection tube 3, the tip side small tube member 31, the proximal end side small tube member 32, and the engaging cylinder 33 are all made of the same material. By forming the internal protective tube 3 from one material, the internal protective tube 3 has the same characteristics as a whole. In particular, since the materials have the same coefficient of thermal expansion, damage due to the difference in thermal expansion can be suppressed.

内部保護管３を形成する先端側小管部材３１，基端側小管部材３２及び係合筒３３は、その軸方向長さが限定されない。先端側小管部材３１と基端側小管部材３２のそれぞれは、従来の測温プローブの内部保護管より短い長さであることが好ましい。すなわち、先端側小管部材３１と基端側小管部材３２のそれぞれは、従来の加熱炉で製造できる長さより短い長さであることが好ましい。 The axial lengths of the distal end side tubular member 31, the proximal end side tubular member 32, and the engaging cylinder 33 forming the internal protective tube 3 are not limited. It is preferable that each of the distal end side capillary member 31 and the proximal end side capillary member 32 has a length shorter than that of the internal protection tube of the conventional temperature measuring probe. That is, it is preferable that each of the tip end side small tube member 31 and the proximal end side small tube member 32 has a length shorter than the length that can be manufactured in a conventional heating furnace.

（外部保護管）
外部保護管４は、両端が開口した円筒形状の部材である。外部保護管４は、内部（軸芯の中空部）に内部保護管３を配置する。外部保護管４は、内部保護管３を内部に配置したときに、その内周面と内部保護管３の外周面との間に環状のすき間（小間隔）を有するように形成されている。外部保護管４の内径は、内部保護管３の外径（最大外径、係合筒３３の外径）よりもすき間の分だけ大きい。 (External protection tube)
The external protective tube 4 is a cylindrical member with both ends open. As for the external protective tube 4, the internal protective tube 3 is arranged inside (hollow portion of the shaft core). The outer protective tube 4 is formed so as to have an annular gap (small interval) between the inner peripheral surface thereof and the outer peripheral surface of the inner protective tube 3 when the inner protective tube 3 is arranged inside. The inner diameter of the outer protective tube 4 is larger than the outer diameter of the inner protective tube 3 (maximum outer diameter, outer diameter of the engaging cylinder 33) by the amount of the gap.

外部保護管４は、その具体的な形状が限定されない。外部保護管４の厚さも限定されず、従来の測温プローブでの厚さと同等とすることができる。外部保護管４の軸方向長さも限定されず、測温対象物（金属溶湯）の温度を測定するときに、先端側の端部が測温対象物（金属溶湯）に浸漬できる長さである。測温プローブ１の先端部３０を金属溶湯に浸漬したときに、測温対象物の湯面（スラグライン）が、外部保護管４の外周面と重なる。 The specific shape of the external protective tube 4 is not limited. The thickness of the external protection tube 4 is not limited, and can be made equivalent to the thickness of the conventional temperature measuring probe. The axial length of the external protective tube 4 is not limited, and when measuring the temperature of the temperature-measured object (metal molten metal), the end portion on the tip side can be immersed in the temperature-measured object (metal molten metal). .. When the tip 30 of the temperature measuring probe 1 is immersed in the molten metal, the molten metal surface (slag line) of the temperature measuring object overlaps with the outer peripheral surface of the external protective tube 4.

外部保護管４は、セラミックスで形成される。外部保護管４を形成する具体的なセラミックスは、測温対象物の温度域で要求される特性（例えば、耐熱性，耐熱衝撃性，強度）により適宜選択される。セラミックスとしては、例えば、アルミナを主成分とするセラミックスをあげることができる。本形態では、アルミナとカーボンとを混合させた混合材料である。 The outer protective tube 4 is made of ceramics. The specific ceramics forming the external protective tube 4 are appropriately selected according to the characteristics (for example, heat resistance, heat impact resistance, strength) required in the temperature range of the object to be measured. Examples of the ceramics include ceramics containing alumina as a main component. In this embodiment, it is a mixed material in which alumina and carbon are mixed.

アルミナとカーボンの混合材料では、アルミナとカーボンの含有割合が限定されない。アルミナをカーボンより多く含有した複合材料であることが好ましく、混合材料の全体を１００ｍａｓｓ％としたときに、アルミナが６５〜９０％、カーボンが１０〜３５％の割合で含まれるものであることが好ましい。より好ましくは、アルミナが６５〜８０％、カーボンが２０〜３５％で含まれるセラミックスである。 In the mixture material of alumina and carbon, the content ratio of alumina and carbon is not limited. It is preferable that the composite material contains more alumina than carbon, and when the total amount of the mixed material is 100 mass%, alumina is contained in a ratio of 65 to 90% and carbon is contained in a ratio of 10 to 35%. preferable. More preferably, it is a ceramic containing 65 to 80% of alumina and 20 to 35% of carbon.

外部保護管４のセラミックスは、複数の細孔をもつ多孔質体であることが好ましく、その気孔率が１〜３０％程度であることが好ましい。気孔率は、２〜２５％程度が好ましく、５〜２０％程度がより好ましい。外部保護管４のセラミックスの気孔率は、内部保護管３のサーメットの気孔率よりも大きいことが好ましい。 The ceramics of the outer protective tube 4 are preferably a porous body having a plurality of pores, and the porosity is preferably about 1 to 30%. The porosity is preferably about 2 to 25%, more preferably about 5 to 20%. The porosity of the ceramics of the outer protective tube 4 is preferably larger than the porosity of the cermet of the inner protective tube 3.

外部保護管４は、円筒形状の先端側管部材４０及び円筒形状の基端側管部材４１を同軸状態で接合材により接合してなる。すなわち、外部保護管４は、軸方向に隣接する複数の円筒形状の管部材を接合材で接合してなる。 The external protective tube 4 is formed by joining a cylindrical tip side pipe member 40 and a cylindrical base end side pipe member 41 in a coaxial state with a joining material. That is, the external protective tube 4 is formed by joining a plurality of cylindrical tube members adjacent in the axial direction with a joining material.

先端側管部材４０及び基端側管部材４１は、いずれも円筒形状を有する。先端側管部材４０及び基端側管部材４１は、内径及び外径が同じ円筒形状を有する。先端側管部材４０及び基端側管部材４１は、同軸で軸方向に隣接して配したときに、内周面及び外周面が連続したなめらかな（接合部４２で凹凸がない）表面を形成できる。 Both the distal end side tube member 40 and the proximal end side tube member 41 have a cylindrical shape. The distal end side tube member 40 and the proximal end side tube member 41 have a cylindrical shape having the same inner and outer diameters. When the distal end side tube member 40 and the proximal end side tube member 41 are arranged coaxially adjacent to each other in the axial direction, the inner peripheral surface and the outer peripheral surface form a continuous smooth surface (the joint portion 42 has no unevenness). can.

外部保護管４において、先端側管部材４０と基端側管部材４１が接合した接合部４２の軸方向位置が、内部保護管３の先端側小管部材３１と基端側小管部材３２の係合部３４の軸方向位置とは異なる位置となっている。具体的には、外部保護管４の先端側管部材４０と基端側管部材４１との接合部４２の軸方向位置は、測温プローブ１で金属溶湯の測温を行うときの金属溶湯の湯面（スラグライン）よりも基端側（図１で上方側）に位置する。外部保護管４の先端側管部材４０と基端側管部材４１の接合部４２の軸方向位置は、内部保護管３の先端側小管部材３１と基端側小管部材３２の係合部３４の軸方向位置より先端側（図１で下方側）に位置する。すなわち、測温プローブ１で金属溶湯の測温を行うときに、基端側から先端側に進むにつれて、係合部３４、接合部４２、金属溶湯の湯面がこの順序で位置する。
係合部３４と接合部４２との間隔（軸方向位置の間隔）は限定されない。５０ｍｍ以上であることが好ましく、５０〜１００ｍｍがより好ましく、６０〜９０ｍｍが更に好ましい。 In the external protective tube 4, the axial position of the joint portion 42 to which the distal end side tube member 40 and the proximal end side tubular member 41 are joined is the engagement between the distal end side tubular member 31 and the proximal end side tubular member 32 of the internal protective tube 3. The position is different from the axial position of the portion 34. Specifically, the axial position of the joint portion 42 between the distal end side tube member 40 and the proximal end side tube member 41 of the external protective tube 4 is the position of the molten metal when the temperature measuring probe 1 is used to measure the temperature of the molten metal. It is located on the base end side (upper side in FIG. 1) of the hot water surface (slag line). The axial position of the joint portion 42 between the distal end side tube member 40 and the proximal end side tubular member 41 of the external protective tube 4 is the engaging portion 34 between the distal end side tubular member 31 and the proximal end side tubular member 32 of the internal protective tube 3. It is located on the tip side (lower side in FIG. 1) from the axial position. That is, when the temperature measuring probe 1 measures the temperature of the molten metal, the engaging portion 34, the joint portion 42, and the molten metal surface of the molten metal are located in this order as the temperature is measured from the proximal end side to the distal end side.
The distance between the engaging portion 34 and the joining portion 42 (distance in the axial position) is not limited. It is preferably 50 mm or more, more preferably 50 to 100 mm, still more preferably 60 to 90 mm.

外部保護管４の先端側管部材４０と基端側管部材４１を接合する接合材は、２つの管部材４０，４１を接合できる接合材を用いることができる。この接合材としては、例えば、セラミックスを含むセメントを挙げることができる。 As the joining material for joining the distal end side pipe member 40 and the proximal end side pipe member 41 of the external protective pipe 4, a joining material capable of joining the two pipe members 40 and 41 can be used. Examples of the bonding material include cement containing ceramics.

本形態では、外部保護管４が先端側管部材４０と基端側管部材４１を接合材で接合しているが、３本以上の管部材から形成していてもよい。さらに、各管部材４０，４１も、軸方向に延びる柱状の部材を周方向で接合して形成したものでもよい。 In this embodiment, the external protective tube 4 joins the distal end side tube member 40 and the proximal end side tube member 41 with a joining material, but it may be formed of three or more tube members. Further, the pipe members 40 and 41 may also be formed by joining columnar members extending in the axial direction in the circumferential direction.

外部保護管４は、その内部（軸芯の中空部）に内部保護管３を収容する。このとき、外部保護管４の内周面と内部保護管３の外周面との間のすき間には、充填材４３が充填している。充填材４３としては、外部保護管４の接合材と同じ材料を挙げることができる。本形態では、充填材４３にセメントを用いた。 The external protective tube 4 accommodates the internal protective tube 3 inside (hollow portion of the shaft core). At this time, the gap between the inner peripheral surface of the outer protective tube 4 and the outer peripheral surface of the inner protective tube 3 is filled with the filler 43. As the filler 43, the same material as the joining material of the external protective tube 4 can be mentioned. In this embodiment, cement is used as the filler 43.

（保護キャスタブル）
保護キャスタブル５は、外部保護管４の基端側で、その外周面を覆うように、全体が円筒形状をなすように形成されている。保護キャスタブル５は、その内周面が外部保護管４の外周面に密着した状態で一体に形成されている。保護キャスタブル５は、外部保護管４の外周面が露出しないように形成される。保護キャスタブル５は、その下端の端部が、測温プローブ１で金属溶湯の測温を行うときの金属溶湯の湯面（スラグライン）よりも下方に位置する。 (Protective castable)
The protective castable 5 is formed on the base end side of the external protective tube 4 so as to cover the outer peripheral surface thereof so as to form an entire cylindrical shape. The protective castable 5 is integrally formed with its inner peripheral surface in close contact with the outer peripheral surface of the external protective tube 4. The protective castable 5 is formed so that the outer peripheral surface of the external protective tube 4 is not exposed. The lower end of the protective castable 5 is located below the surface (slag line) of the molten metal when measuring the temperature of the molten metal with the temperature measuring probe 1.

保護キャスタブル５は、不定形耐火物を成型して形成されている。保護キャスタブル５を形成する不定形耐火物の具体的な材料は限定されない。従来の測温プローブの外周面を形成するキャスタブルを用いることができる。本形態では、キャスタブルセメントを用いている。
保護キャスタブル５は、不定形耐火物を成型して形成されており、不定形耐火物の材料粒子が未焼結で形成されている。保護キャスタブル５は、外部保護管４よりも大きな気孔率を有する。 The protective castable 5 is formed by molding an amorphous refractory material. The specific material of the amorphous refractory forming the protective castable 5 is not limited. A castable that forms the outer peripheral surface of a conventional temperature measuring probe can be used. In this embodiment, castable cement is used.
The protective castable 5 is formed by molding an amorphous refractory, and the material particles of the amorphous refractory are formed unsintered. The protective castable 5 has a larger porosity than the external protective tube 4.

（フランジ）
フランジ６は、本体部６０、内側筒部６２，外側筒部６３を一体に備える。
本体部６０は、軸方向に垂直な方向に広がる、略円環形状の板状を有する。本体部６０は、略円環形状の軸芯部に、内部保護管３が挿通する挿通孔６１が形成されている。挿通孔６１は、内部保護管３が挿入可能な径で形成されている。本形態では、挿通孔６１の内周形状（内径）が、内部保護管３の外周形状（外径）と略一致する。挿通孔６１に内部保護管３を挿入したときに、挿通孔６１の内周面と内部保護管３の外周面とが全周にわたって密着する。 (Flange)
The flange 6 integrally includes a main body portion 60, an inner cylinder portion 62, and an outer cylinder portion 63.
The main body 60 has a substantially annular plate shape that extends in a direction perpendicular to the axial direction. The main body 60 has an insertion hole 61 through which the internal protective tube 3 is inserted in a substantially ring-shaped shaft core. The insertion hole 61 is formed with a diameter into which the internal protection tube 3 can be inserted. In this embodiment, the inner peripheral shape (inner diameter) of the insertion hole 61 substantially matches the outer peripheral shape (outer diameter) of the inner protective tube 3. When the internal protection tube 3 is inserted into the insertion hole 61, the inner peripheral surface of the insertion hole 61 and the outer peripheral surface of the internal protection tube 3 are in close contact with each other over the entire circumference.

内側筒部６２は、本体部６０の表面６０ａ（基端側に向いた面）から基端側に立設する筒状の部分である。内側筒部６２は、挿通孔６１の開口形状と一致する内径をもつ円筒形状を有する。内側筒部６２は、その内部に内部保護管３が挿通（あるいは嵌入）する。 The inner tubular portion 62 is a tubular portion that stands upright from the surface 60a (the surface facing the proximal end side) of the main body 60 to the proximal end side. The inner tubular portion 62 has a cylindrical shape having an inner diameter that matches the opening shape of the insertion hole 61. The inner protective tube 3 is inserted (or fitted) into the inner tubular portion 62.

内側筒部６２は、その軸方向長さが限定されない。すなわち、本体部６０の表面６０ａから立設する立設高さが限定されない。内側筒部６２の軸方向長さは、内側筒部６２及び挿通孔６１に挿通した内部保護管３を保持（支持又は固定）できる長さであればよい。内側筒部６２は、内側筒部６２に内部保護管３を保持（支持又は固定）する保持手段を設けてもよい。本形態では、内側筒部６２と内部保護管３との間に、接合材を配して接合（保持）している。本形態の接合材は、外部保護管４と内部保護管３とを接合する接合材を用いた。
内側筒部６２の基端側の端部は、プローブ頭部２３に接続する。 The axial length of the inner tubular portion 62 is not limited. That is, the height of standing upright from the surface 60a of the main body 60 is not limited. The axial length of the inner cylinder portion 62 may be a length that can hold (support or fix) the inner protection tube 3 inserted through the inner cylinder portion 62 and the insertion hole 61. The inner cylinder portion 62 may be provided with a holding means for holding (supporting or fixing) the internal protection tube 3 in the inner cylinder portion 62. In this embodiment, a joining material is arranged and joined (held) between the inner cylinder portion 62 and the inner protection pipe 3. As the joining material of this embodiment, a joining material for joining the outer protection tube 4 and the inner protection tube 3 was used.
The end portion of the inner tubular portion 62 on the proximal end side is connected to the probe head 23.

外側筒部６３は、本体部６０の裏面６０ｂから先端側に立設する筒状の部分である。外側筒部６３は、本体部６０の外周形状と一致する内径をもつ円筒形状を有する。外側筒部６３は、その内部に内部保護管３が挿通する。外側筒部６３は、その内部に接合材６４が充填され、フランジ６に外部保護管４及び保護キャスタブル５が接合される。 The outer tubular portion 63 is a tubular portion that stands upright from the back surface 60b of the main body portion 60 to the tip end side. The outer tubular portion 63 has a cylindrical shape having an inner diameter that matches the outer peripheral shape of the main body portion 60. An internal protective tube 3 is inserted into the outer tubular portion 63. The outer tubular portion 63 is filled with a joining material 64, and the outer protective tube 4 and the protective castable 5 are joined to the flange 6.

外側筒部６３は、その軸方向長さが限定されない。すなわち、本体部６０の裏面６０ｂから立設する立設高さが限定されない。外側筒部６３の軸方向長さは、外部保護管４及び保護キャスタブル５を接合材６４で接合できる長さであればよい。 The axial length of the outer tubular portion 63 is not limited. That is, the height of standing upright from the back surface 60b of the main body 60 is not limited. The axial length of the outer tubular portion 63 may be any length as long as the external protective tube 4 and the protective castable 5 can be joined by the joining material 64.

フランジ６は、本体部６０の裏面６０ｂ側に、従来の測温プローブで使用している耐熱材を配してもよい。耐熱材は、多孔質のセラミックス板よりなることが好ましい。耐熱材は、接合材６４で本体部６０に接合して固定する。 The flange 6 may be provided with a heat-resistant material used in a conventional temperature measuring probe on the back surface 60b side of the main body 60. The heat-resistant material is preferably made of a porous ceramic plate. The heat-resistant material is joined to and fixed to the main body 60 with the joining material 64.

接合材６４は、外部保護管４及び保護キャスタブル５をフランジ６に接合して固定する。接合材６４は、外部保護管４及び保護キャスタブル５の基端側の端面がフランジ６の裏面６０ｂに密着した状態（外部保護管４の端面がフランジ６に押しつけられた状態）で、接合し固定する。接合材６４は、従来の接合材を用いることができる。本形態において、接合材６４は、フランジ６の外側筒部６３の内部に充填されたセメントを固化して形成される。 The joining material 64 joins and fixes the external protective pipe 4 and the protective castable 5 to the flange 6. The joining material 64 is joined and fixed in a state where the end faces of the external protective tube 4 and the protective castable 5 on the base end side are in close contact with the back surface 60b of the flange 6 (the end face of the external protective tube 4 is pressed against the flange 6). do. As the joining material 64, a conventional joining material can be used. In the present embodiment, the joining material 64 is formed by solidifying the cement filled inside the outer tubular portion 63 of the flange 6.

本体部６０は、裏面６０ｂに、接合材６４の抜け落ちを防止するためのスタッドを有していてもよい。スタッドの形状や数等については限定されない。本体部６０がスタッドを有する場合、接合材６４は、スタッドを囲包する状態で充填されることが好ましい。 The main body 60 may have a stud on the back surface 60b to prevent the joining material 64 from falling off. The shape and number of studs are not limited. When the main body 60 has a stud, the joining material 64 is preferably filled so as to surround the stud.

（製造方法）
本形態の測温プローブ１は、その製造方法が限定されない。内部保護管３及び外部保護管４をそれぞれ製造した後に、従来の測温プローブ１と同様な製造方法で製造できる。
内部保護管３は、先端側小管部材３１と基端側小管部材３２及び係合筒３３となる各部材をそれぞれ形成する（具体的には、加熱炉で焼成して焼成体を得る）。そして、所定の端部に雄ネジ部３１０，３２０及び雌ネジ部３３０，３３１を形成（例えば、タップやダイスでネジ山を形成）する。その後、雄ネジ部３１０と雌ネジ部３３０、及び雄ネジ部３２０と雌ネジ部３３１のそれぞれを螺合して係合する。以上により、本形態の測温プローブ１を製造できる。 (Production method)
The manufacturing method of the temperature measuring probe 1 of this embodiment is not limited. After manufacturing the inner protection tube 3 and the outer protection tube 4, they can be manufactured by the same manufacturing method as the conventional temperature measuring probe 1.
The internal protection tube 3 forms each member to be the tip end side small tube member 31, the proximal end side small tube member 32, and the engaging cylinder 33 (specifically, a fired body is obtained by firing in a heating furnace). Then, male screw portions 310, 320 and female screw portions 330, 331 are formed at predetermined ends (for example, threads are formed with taps or dies). After that, the male screw portion 310 and the female screw portion 330, and the male screw portion 320 and the female screw portion 331 are screwed and engaged with each other. From the above, the temperature measuring probe 1 of this embodiment can be manufactured.

また、本形態において、フランジ６は、図１に示すように、本体部６０と外側筒部６３を有する耐熱性金属よりなる部材に、内側筒部６２を有する耐熱性金属よりなる部材を溶接で接合して形成しているが、この形態に限定されない。本体部６０、内側筒部６２、外側筒部６３となる部材を形成し、一体に接合して形成してもよい。 Further, in the present embodiment, as shown in FIG. 1, the flange 6 is formed by welding a member made of a heat-resistant metal having an inner cylinder portion 62 to a member made of a heat-resistant metal having a main body portion 60 and an outer cylinder portion 63. It is formed by joining, but it is not limited to this form. Members to be the main body portion 60, the inner cylinder portion 62, and the outer cylinder portion 63 may be formed and integrally joined to form.

（効果）
本形態の測温プローブ１は、先端部３０が閉塞した有底筒状を有し、サーメット（金属とセラミックスとを含有する材料）で形成された内部保護管３と、内部保護管３の内部に配された、測温対象物の温度を測定する測温部２０を有する熱電対（測温手段）２と、内部保護管３を内部に配する筒状を有し、セラミックスで形成された外部保護管４と、を有する。そして、内部保護管３は、先端側小管部材３１と基端側小管部材３２（軸方向に配列した複数の小管部材）と、先端側小管部材３１と基端側小管部材３２（隣接した２つの小管部材）を一体に係合する係合筒３３（係合手段）と、を有する。 (effect)
The temperature measuring probe 1 of this embodiment has a bottomed tubular shape in which the tip portion 30 is closed, and has an internal protective tube 3 formed of a cermet (a material containing metal and ceramics) and the inside of the internal protective tube 3. It has a thermocouple (temperature measuring means) 2 having a temperature measuring unit 20 for measuring the temperature of the object to be measured, and a tubular shape in which the internal protective tube 3 is arranged inside, and is made of ceramics. It has an external protective tube 4. The internal protection tube 3 includes a tip side small tube member 31 and a proximal side small tube member 32 (a plurality of small tube members arranged in the axial direction), and a distal end side small tube member 31 and a proximal end side small tube member 32 (two adjacent small tube members). It has an engaging cylinder 33 (engaging means) for integrally engaging the small tube member).

本形態の測温プローブ１は、係合手段が、先端側小管部材３１と基端側小管部材３２（隣接した２つの小管部材）の近接した端部のそれぞれに形成された雄ネジ部３１０，３２０と、雄ネジ部３１０（２つの雄ネジ部３１０，３２０の一方の雄ネジ部）に螺合する雌ネジ部３３０を一方の端部に、雄ネジ部３２０（２つの雄ネジ部３１０，３２０の他方の雄ネジ部）に螺合する雌ネジ部３３１を他方の端部に、それぞれ有する筒状の係合筒３３と、からなる。 In the temperature measuring probe 1 of the present embodiment, the engaging means is a male screw portion 310, which is formed at each of the adjacent end portions of the distal end side capillary member 31 and the proximal end side capillary member 32 (two adjacent small tube members). 320 and a female threaded portion 330 screwed into a male threaded portion 310 (one of the two male threaded portions 310, 320) are attached to one end, and a male threaded portion 320 (two male threaded portions 310, It is composed of a tubular engaging cylinder 33 having a female screw portion 331 screwed into the other male screw portion of 320) at the other end.

本形態の測温プローブ１は、サーメットよりなる内部保護管３が、隣接した先端側小管部材３１と基端側小管部材３２を係合筒３３で一体に係合してなる。この構成によると、長尺の測温プローブ１を、簡単かつ安価に製造することができる。 In the temperature measuring probe 1 of this embodiment, the internal protection tube 3 made of a cermet integrally engages the adjacent tip side small tube member 31 and the proximal end side small tube member 32 with the engaging cylinder 33. According to this configuration, the long temperature measuring probe 1 can be manufactured easily and inexpensively.

具体的には、従来の内部保護管３は、サーメットを焼成する焼成炉のサイズによりその長さが限定されていた。これに対し、本形態の測温プローブ１では、先端側小管部材３１と基端側小管部材３２を係合筒３３で一体に係合・固定することで、長尺のサーメットよりなる内部保護管３を得ることができる。先端側小管部材３１と基端側小管部材３２は、いずれも従来の内部保護管より長くする必要がない。先端側小管部材３１と基端側小管部材３２は、従来の製造方法（製造装置、加熱炉）を用いて製造することができる。この結果、従来の方法ではその製造が困難となっていた長尺の内部保護管３を用いた測温プローブ１を簡単かつ低コストで製造することができる。 Specifically, the length of the conventional internal protection tube 3 is limited by the size of the firing furnace for firing the cermet. On the other hand, in the temperature measuring probe 1 of this embodiment, the tip side small tube member 31 and the base end side small tube member 32 are integrally engaged and fixed by the engaging cylinder 33, so that an internal protective tube made of a long cermet is formed. 3 can be obtained. Neither the tip end side small tube member 31 nor the proximal end side small tube member 32 needs to be longer than the conventional internal protection tube. The tip end side small tube member 31 and the proximal end side small tube member 32 can be manufactured by using a conventional manufacturing method (manufacturing apparatus, heating furnace). As a result, the temperature measuring probe 1 using the long internal protection tube 3, which has been difficult to manufacture by the conventional method, can be manufactured easily and at low cost.

本形態では、従来の測温プローブの内部保護管を先端側小管部材３１に用い、先端側小管部材３１より短い基端側小管部材３２を用いることができる。そうすると、基端側小管部材３２のみを新たに設計・製造することで、内部保護管３を製造できる。この結果、先端側小管部材３１も新たに設計・製造する場合と比較して、より低コストで内部保護管３を製造することができる。先端側小管部材３１と基端側小管部材３２は、全体として内部保護管３を形成できる形状（軸方向長さ）であれば、具体的な形状（サイズ）が限定されない。例えば、基端側小管部材３２は軸方向長さが、２００ｍｍ以上であることが好ましく、２００〜５００ｍｍがより好ましく、２５０〜４００ｍｍが更に好ましい。ここで、基端側小管部材３２の軸方向長さは、フランジ６の本体部６０の裏面６０ｂからの長さとしてもよい。 In this embodiment, the internal protection tube of the conventional temperature measuring probe can be used for the tip side small tube member 31, and the proximal side small tube member 32 shorter than the tip side small tube member 31 can be used. Then, the internal protection tube 3 can be manufactured by newly designing and manufacturing only the proximal end side small tube member 32. As a result, the internal protection tube 3 can be manufactured at a lower cost as compared with the case where the tip side small tube member 31 is also newly designed and manufactured. The specific shape (size) of the tip end side small tube member 31 and the proximal end side small tube member 32 is not limited as long as it has a shape (axial length) capable of forming the internal protection tube 3 as a whole. For example, the proximal end side small tube member 32 preferably has an axial length of 200 mm or more, more preferably 200 to 500 mm, and even more preferably 250 to 400 mm. Here, the axial length of the proximal end side small tube member 32 may be the length from the back surface 60b of the main body 60 of the flange 6.

本形態の測温プローブ１は、外部保護管４が、軸方向に配列した先端側管部材４０と基端側管部材４１（複数の管部材）と、先端側管部材４０と基端側管部材４１を接合する接合材と、からなる。そして、外部保護管４における先端側管部材４０と基端側管部材４１が接合した接合部４２は、測温プローブ１における軸方向での位置が、内部保護管３における先端側小管部材３１と基端側小管部材３２の係合部３４と異なっている。より具体的には、内部保護管３の係合部３４は、外部保護管４の接合部４２より基端側に位置する。 In the temperature measuring probe 1 of this embodiment, the external protective tubes 4 are arranged in the axial direction of the distal end side tube member 40 and the proximal end side tube member 41 (a plurality of tubular members), and the distal end side tube member 40 and the proximal end side tube. It is composed of a joining material for joining the member 41. The joint portion 42 to which the distal end side tube member 40 and the proximal end side tube member 41 of the external protective tube 4 are joined is located at the axial position of the temperature measuring probe 1 with the distal end side small tube member 31 of the internal protective tube 3. It is different from the engaging portion 34 of the proximal end side capillary member 32. More specifically, the engaging portion 34 of the internal protective tube 3 is located on the proximal end side of the joint portion 42 of the external protective tube 4.

この構成によると、本形態の測温プローブ１の先端を測温対象物（金属溶湯）に浸漬してその温度を測定するときに、金属溶湯の流れに起因する軸方向に垂直な方向（横方向）の応力が測温プローブ１に加わっても、測温プローブ１の損傷（折損）が抑えられる。 According to this configuration, when the tip of the temperature measuring probe 1 of this embodiment is immersed in a temperature measuring object (melted metal) and the temperature is measured, the direction (horizontal) perpendicular to the axial direction caused by the flow of the molten metal. Even if the stress in the direction) is applied to the temperature measuring probe 1, damage (breakage) of the temperature measuring probe 1 can be suppressed.

具体的には、温度を測定する測温対象物（金属溶湯、例えば溶鋼）は、タンディッシュに貯留している状態では、静止しておらず、内部に流れが生じている。この状態で溶鋼に測温プローブ１の先端（すなわち、内部保護管３の先端部３０）を浸漬すると、測温プローブ１には、溶鋼の流れに起因する力が加わる。この力は、主に横方向（軸方向に垂直な面に沿う方向）に向かう力である。すなわち、測温プローブ１の内部保護管３と外部保護管４のそれぞれに、横方向の力が加わる。内部保護管３と外部保護管４のそれぞれは、基端側が固定し、先端側が固定されておらず、基端部を中心に測温プローブ１が揺動するように変位する。そして、測温プローブ１に横方向に加わった力は、内部保護管３の係合部３４と、外部保護管４の接合部４２のそれぞれに集中する。内部保護管３の係合部３４と外部保護管４の接合部４２の軸方向での位置が異なっていることで、測温プローブ１の軸方向で応力が集中しなくなる。この結果、測温プローブ１の損傷（折損）が抑えられる。 Specifically, the temperature-measuring object (molten metal, for example, molten steel) for which the temperature is measured is not stationary in the state of being stored in the tundish, and a flow is generated inside. When the tip of the temperature measuring probe 1 (that is, the tip 30 of the internal protection tube 3) is immersed in the molten steel in this state, a force due to the flow of the molten steel is applied to the temperature measuring probe 1. This force is mainly in the lateral direction (the direction along the plane perpendicular to the axial direction). That is, a lateral force is applied to each of the internal protection tube 3 and the external protection tube 4 of the temperature measuring probe 1. Each of the internal protection tube 3 and the external protection tube 4 is fixed on the proximal end side and not fixed on the distal end side, and the temperature measuring probe 1 is displaced so as to swing around the proximal end portion. Then, the force applied laterally to the temperature measuring probe 1 is concentrated on the engaging portion 34 of the internal protection tube 3 and the joint portion 42 of the external protection tube 4. Since the positions of the engaging portion 34 of the internal protection tube 3 and the joint portion 42 of the external protection tube 4 in the axial direction are different, the stress is not concentrated in the axial direction of the temperature measuring probe 1. As a result, damage (breakage) of the temperature measuring probe 1 is suppressed.

さらに詳しくは、内部保護管３に横方向の力が加わると、先端側小管部材３１と基端側小管部材３２のそれぞれに横向きの力が加わる。そして、横方向に向けて変形する。横方向への変形は、その変形量が、先端側が基端側より大きくなる。この変形量の差により係合部３４に応力が集中する。そして、先端側小管部材３１が大きく変形しようとしても、外部保護管４の基端側管部材４１によりそれ以上の変形が規制される。この結果、係合部３４に集中する応力を低減でき、内部保護管３の折損が抑えられる。同様に、外部保護管４に横方向の応力が加わって先端側管部材４０が変形しようとしても、その変形が内部保護管３（の先端側小管部材３１）に規制される。接合部４２に集中する応力を低減でき、外部保護管４の折損が抑えられる。この結果、測温プローブ１の損傷（折損）が抑えられる。 More specifically, when a lateral force is applied to the internal protection tube 3, a lateral force is applied to each of the distal end side small tube member 31 and the proximal end side small tube member 32. Then, it deforms in the lateral direction. The amount of deformation in the lateral direction is larger on the tip side than on the base end side. Due to this difference in the amount of deformation, stress is concentrated on the engaging portion 34. Then, even if the tip end side small tube member 31 is about to be significantly deformed, further deformation is restricted by the base end side tube member 41 of the external protection tube 4. As a result, the stress concentrated on the engaging portion 34 can be reduced, and the breakage of the internal protection tube 3 can be suppressed. Similarly, even if a lateral stress is applied to the external protective tube 4 and the tip side tube member 40 tries to be deformed, the deformation is restricted to the internal protection tube 3 (the tip side small tube member 31). The stress concentrated on the joint portion 42 can be reduced, and the breakage of the external protective pipe 4 can be suppressed. As a result, damage (breakage) of the temperature measuring probe 1 is suppressed.

対して、内部保護管３と外部保護管４のそれぞれの接合部の軸方向位置が同じとなると、先端側小管部材３１と先端側管部材４０の少なくとも一方が変形しようとしたときに、その変形が規制されない。この結果、内部保護管３の係合部３４と外部保護管４の接合部４２の少なくとも一方に応力が集中し、この位置で損傷（折損）が生じる。このように、内部保護管３と外部保護管４のそれぞれの接合部の軸方向位置が同じとなると、測温プローブ１に損傷（折損）が生じやすくなる。 On the other hand, when the axial positions of the joints of the inner protection tube 3 and the outer protection tube 4 are the same, when at least one of the tip side small tube member 31 and the tip side tube member 40 tries to be deformed, the deformation thereof. Is not regulated. As a result, stress is concentrated on at least one of the engaging portion 34 of the internal protective tube 3 and the joint portion 42 of the external protective tube 4, and damage (breakage) occurs at this position. As described above, when the axial positions of the joints of the internal protection tube 3 and the external protection tube 4 are the same, the temperature measuring probe 1 is likely to be damaged (broken).

本形態の測温プローブ１は、内部保護管３の係合手段が、軸方向で隣接する先端側小管部材３１と基端側小管部材３２の近接した端部のそれぞれの外周面に形成された雄ネジを有する雄ネジ部３１０，３２０と、両端部側の内周面に２つの雄ネジ部３１０，３２０の一方の雄ネジ部３１０に螺合する雌ネジ部３３０と、他方の雄ネジ部３２０に螺合する雌ネジ部３３１と、を有する筒状の係合筒３３と、からなる。 In the temperature measuring probe 1 of this embodiment, the engaging means of the internal protection tube 3 is formed on the outer peripheral surfaces of the distal end side small tube member 31 and the proximal end side small tube member 32 adjacent to each other in the axial direction. Male threaded portions 310 and 320 having male threads, female threaded portions 330 screwed into one male threaded portion 310 of two male threaded portions 310 and 320 on the inner peripheral surfaces on both end sides, and the other male threaded portion. It is composed of a tubular engaging cylinder 33 having a female screw portion 331 screwed into 320, and a tubular engaging cylinder 33.

この構成によると、先端側小管部材３１と基端側小管部材３２が、簡単な構成で強固に係合・固定した内部保護管３となる。また、係合筒３３が、先端側小管部材３１と基端側小管部材３２の端部を係合する構成となっており、内部保護管３に横方向の応力が加わっても、先端側小管部材３１と基端側小管部材３２の係合部３４（端部同士が対向した部分）を覆う係合筒３３が応力の集中を抑える。この結果、本形態の測温プローブ１は、その損傷（折損）をより確実に抑えることができる。 According to this configuration, the distal end side capillary member 31 and the proximal end side capillary member 32 form an internal protective tube 3 that is firmly engaged and fixed with a simple configuration. Further, the engaging cylinder 33 is configured to engage the end portion of the distal end side capillary member 31 and the proximal end side capillary member 32, and even if lateral stress is applied to the internal protection tube 3, the distal end side capillary tube 3 is applied. The engaging cylinder 33 that covers the engaging portion 34 (the portion where the ends face each other) of the member 31 and the proximal end side small tube member 32 suppresses the concentration of stress. As a result, the temperature measuring probe 1 of this embodiment can more reliably suppress its damage (breakage).

さらに、係合筒３３は、先端側小管部材３１と基端側小管部材３２の端部（係合部３４）を全周で覆う円筒形状を有しており、内部保護管３（測温プローブ１）に加わる応力の方向によらず、上記効果を発揮できる。すなわち、本形態の測温プローブ１は、流れのある測温対象物（金属溶湯）の温度を測定するときに、測温対象物（金属溶湯）の流れの向きによらずに損傷を抑えつつ温度を測定できる。また、測温対象物（金属溶湯）の温度を測定しているときに、測温対象物（金属溶湯）の流れの向きが変化しても、測温プローブ１が損傷（折損）することが抑えられる。 Further, the engaging cylinder 33 has a cylindrical shape that covers the end portion (engaging portion 34) of the distal end side tubular member 31 and the proximal end side capillary member 32 all around, and the internal protective tube 3 (temperature measuring probe). The above effect can be exhibited regardless of the direction of the stress applied to 1). That is, the temperature measuring probe 1 of this embodiment suppresses damage regardless of the direction of the flow of the temperature measuring object (metal molten metal) when measuring the temperature of the temperature measuring object (metal molten metal) having a flow. The temperature can be measured. Further, even if the direction of the flow of the temperature measuring object (metal molten metal) changes while the temperature of the temperature measuring object (metal molten metal) is being measured, the temperature measuring probe 1 may be damaged (broken). It can be suppressed.

本形態の測温プローブ１は、不定形耐火物よりなり、外部保護管４の外周面を被覆する、保護キャスタブル５を有する。この構成によると、外部保護管４の外周面が露出することが抑えられ、外部保護管４が金属溶湯により摩耗損傷することが抑えられる。特に、保護キャスタブル５が金属溶湯のスラグラインに対応する位置に形成されており、外部保護管４が金属溶湯の湯面の固形物（スラグ）により摩耗損傷することが抑えられる。 The temperature measuring probe 1 of this embodiment is made of an amorphous refractory material and has a protective castable 5 that covers the outer peripheral surface of the external protective tube 4. According to this configuration, the outer peripheral surface of the external protective tube 4 is suppressed from being exposed, and the external protective tube 4 is prevented from being abraded and damaged by the molten metal. In particular, the protective castable 5 is formed at a position corresponding to the slag line of the molten metal, and the external protective tube 4 is prevented from being abraded and damaged by solid matter (slag) on the surface of the molten metal.

［実施形態１の変形形態］
本形態は、内部保護管３の係合手段（係合部３４近傍の構成）が異なること以外は、実施形態１と同様な構成の測温プローブ１である。本形態で特に言及しない構成は、実施形態１と同様な構成である。本形態の測温プローブ１の内部保護管３の係合部近傍の構成を図５に拡大断面図で示す。 [Modified form of embodiment 1]
This embodiment is a temperature measuring probe 1 having the same configuration as that of the first embodiment except that the engaging means of the internal protection tube 3 (the configuration in the vicinity of the engaging portion 34) is different. The configuration not particularly mentioned in this embodiment is the same as that of the first embodiment. The configuration in the vicinity of the engaging portion of the internal protection tube 3 of the temperature measuring probe 1 of this embodiment is shown in an enlarged cross-sectional view in FIG.

先端側小管部材３１は、基端側の端部に雄ネジ部３１０が形成されている。先端側小管部材３１は、基端側の端部（すなわち、雄ネジ部３１０が形成されている部分）の外径が、その他の部分より縮径して形成されている。具体的には、図５に示すように、先端側小管部材３１は、基端側の端部が他の部分（先端部３０を除く）よりも縮径した円筒形状に形成され、その外周面にネジ山が形成された雄ネジ部３１０となっている。雄ネジ部３１０のネジ山は、その最外径が、雄ネジ部３１０以外の円筒形状の部分の外径より小さく形成されている。 The tip-side small tube member 31 has a male screw portion 310 formed at an end portion on the proximal end side. The tip-side small tube member 31 is formed so that the outer diameter of the end portion on the proximal end side (that is, the portion where the male screw portion 310 is formed) is smaller than the other portions. Specifically, as shown in FIG. 5, the tip-side small tube member 31 is formed in a cylindrical shape in which the end portion on the proximal end side has a smaller diameter than other portions (excluding the tip portion 30), and the outer peripheral surface thereof. It is a male screw portion 310 having a thread formed therein. The outermost diameter of the thread of the male threaded portion 310 is formed to be smaller than the outer diameter of the cylindrical portion other than the male threaded portion 310.

基端側小管部材３２は、先端側の端部の外周面に雄ネジ部３２０が形成されている。基端側小管部材３２は、先端側の端部（すなわち、雄ネジ部３２０が形成されている部分）の外径が、その他の部分より縮径した状態で形成されている。具体的には、基端側小管部材３２は、先端側の端部が他の部分よりも縮径した円筒形状に形成され、その外周面にネジ山が形成された雄ネジ部３２０となっている。雄ネジ部３２０のネジ山は、その最外径が、雄ネジ部３２０以外の円筒形状の部分の外径より小さく形成されている。 The base end side small tube member 32 has a male screw portion 320 formed on the outer peripheral surface of the end portion on the tip end side. The proximal end side small tube member 32 is formed in a state where the outer diameter of the distal end portion (that is, the portion where the male screw portion 320 is formed) is smaller than the other portions. Specifically, the proximal end side small tube member 32 becomes a male threaded portion 320 in which the end portion on the distal end side is formed in a cylindrical shape having a diameter smaller than that of other portions, and a thread is formed on the outer peripheral surface thereof. There is. The outermost diameter of the thread of the male threaded portion 320 is formed to be smaller than the outer diameter of the cylindrical portion other than the male threaded portion 320.

係合筒３３は、先端側小管部材３１の雄ネジ部３１０及び基端側小管部材３２の雄ネジ部３２０と螺合する円筒形状の部材である。係合筒３３は、外径及び内径が異なること以外は、実施形態１の係合筒３３と同様な構成である。係合筒３３は、雄ネジ部３１０，３２０と螺合する雌ネジ部３３０，３３１が形成されている。すなわち、係合筒３３は、先端側小管部材３１及び基端側小管部材３２の外径が縮径した端部に対応した内径で形成されている。 The engaging cylinder 33 is a cylindrical member that is screwed with the male threaded portion 310 of the tip side small tube member 31 and the male threaded portion 320 of the proximal end side small tube member 32. The engaging cylinder 33 has the same configuration as the engaging cylinder 33 of the first embodiment except that the outer diameter and the inner diameter are different. The engaging cylinder 33 is formed with female threaded portions 330 and 331 that are screwed with the male threaded portions 310 and 320. That is, the engaging cylinder 33 is formed with an inner diameter corresponding to the end portion where the outer diameter of the tip end side small tube member 31 and the proximal end side small tube member 32 is reduced.

係合筒３３は、その外径が、先端側小管部材３１及び基端側小管部材３２のそれぞれと同じ外径となっている。内部保護管３は、先端側小管部材３１及び基端側小管部材３２が係合筒３３に螺合したときに、その外周面が連続した滑らかな面（軸方向で凹凸がない外周面）をなしている。 The outer diameter of the engaging cylinder 33 is the same as that of the tip end side small tube member 31 and the proximal end side small tube member 32, respectively. When the tip end side small tube member 31 and the proximal end side small tube member 32 are screwed into the engaging cylinder 33, the internal protection tube 3 has a smooth surface (outer peripheral surface having no unevenness in the axial direction) whose outer peripheral surface is continuous. I'm doing it.

（効果）
本形態の測温プローブ１は、内部保護管３の係合構造が異なること以外は、実施形態１と同様な構成を有しており、実施形態１と同様な効果を発揮する。
本形態の測温プローブ１は、内部保護管３がその外周面に凹凸がない形状を有している。この構成によると、内部保護管３の外周面と外部保護管４の内周面との間のすき間を小さくすることができる。そうすると、内部保護管３と外部保護管４とが互いに変形を規制する効果をより発揮でき、測温プローブ１の損傷（折損）をより抑えることができる。 (effect)
The temperature measuring probe 1 of this embodiment has the same configuration as that of the first embodiment except that the engaging structure of the internal protection tube 3 is different, and exhibits the same effect as that of the first embodiment.
In the temperature measuring probe 1 of this embodiment, the internal protective tube 3 has a shape in which the outer peripheral surface thereof is not uneven. According to this configuration, the gap between the outer peripheral surface of the inner protective tube 3 and the inner peripheral surface of the outer protective tube 4 can be reduced. Then, the internal protection tube 3 and the external protection tube 4 can exert the effect of restricting the deformation of each other, and the damage (breakage) of the temperature measuring probe 1 can be further suppressed.

［実施形態２］
本形態は、内部保護管３の係合手段（係合部３４の近傍の構成）が異なること以外は、実施形態１と同様な構成の測温プローブ１である。本形態で特に言及しない構成は、実施形態１と同様な構成である。本形態の測温プローブ１の内部保護管３の係合部近傍の構成を図６〜図７に部分拡大断面図で示す。図７は、図６中のＶＩＩ−ＶＩＩ線での断面図である。
内部保護管３は、先端側小管部材３１、基端側小管部材３２、係止板３５、２本の係止ピン３６（３６０，３６１）を有する。
先端側小管部材３１は、基端側の端部近傍の外周面に係止ピン３６（３６０）が係止する係止穴３１１が開口している。
基端側小管部材３２は、先端側の端部近傍の外周面に係止ピン３６（３６１）が係止する係止穴３２２が開口している。
係止板３５は、軸方向に長く延びた板状（帯状）を有する。係止板３５は、内部保護管３の外周面に当接した状態で配される板状（帯状）の部材であり、帯状の幅方向が周方向に沿って湾曲している。 [Embodiment 2]
This embodiment is a temperature measuring probe 1 having the same configuration as that of the first embodiment except that the engaging means of the internal protection tube 3 (the configuration in the vicinity of the engaging portion 34) is different. The configuration not particularly mentioned in this embodiment is the same as that of the first embodiment. The configuration of the temperature measuring probe 1 of the present embodiment in the vicinity of the engaging portion of the internal protection tube 3 is shown in FIGS. 6 to 7 in a partially enlarged cross-sectional view. FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG.
The internal protection tube 3 has a tip end side small tube member 31, a proximal end side small tube member 32, a locking plate 35, and two locking pins 36 (360, 361).
The tip-side small tube member 31 has a locking hole 311 for locking the locking pin 36 (360) on the outer peripheral surface near the end on the proximal end side.
The base end side small tube member 32 has a locking hole 322 for locking the locking pin 36 (361) on the outer peripheral surface near the end end on the tip end side.
The locking plate 35 has a plate shape (strip shape) that extends long in the axial direction. The locking plate 35 is a plate-shaped (band-shaped) member arranged in contact with the outer peripheral surface of the internal protection tube 3, and the band-shaped width direction is curved along the circumferential direction.

係止板３５は、隣接する先端側小管部材３１と基端側小管部材３２との端部同士をつなぐように、各小管部材３１，３２の外周に配される。係止板３５は、係止穴３５０、及び係止穴３５１が設けられている。係止穴３５０は、係止板３５の先端側小管部材３１の係止穴３１１の径方向外方の位置に設けられ、係止ピン３６（具体的には、係止ピン３６０）が挿通する。係止穴３５１は、係止板３５の基端側小管部材３２の係止穴３２２の径方向外方の位置に設けられ、係止ピン３６（具体的には、係止ピン３６１）が挿通する。
係止穴３５０，３５１は、係止ピン３６（３６０，３６１）が嵌合・固定されるように、その内径が係止ピン３６の外径と一致するように形成されている。 The locking plate 35 is arranged on the outer periphery of each of the small tube members 31 and 32 so as to connect the ends of the adjacent tip side small tube member 31 and the proximal end side small tube member 32 to each other. The locking plate 35 is provided with a locking hole 350 and a locking hole 351. The locking hole 350 is provided at a position outside the radial direction of the locking hole 311 of the small tube member 31 on the tip side of the locking plate 35, and the locking pin 36 (specifically, the locking pin 360) is inserted therethrough. .. The locking hole 351 is provided at a position outward in the radial direction of the locking hole 322 of the proximal end side small tube member 32 of the locking plate 35, and the locking pin 36 (specifically, the locking pin 361) is inserted. do.
The locking holes 350 and 351 are formed so that the inner diameter thereof matches the outer diameter of the locking pin 36 so that the locking pins 36 (360, 361) are fitted and fixed.

係止ピン３６（３６０）は、径方向で連通した係止穴３１１，３５０を貫通して組み付けられ、先端側小管部材３１と係止板３５を係止・固定する。係止ピン３６（３６１）は、径方向で連通した係止穴３２２，３５１を貫通して組み付けられ、基端側小管部材３２と係止板３５を係止・固定する。 The locking pin 36 (360) is assembled so as to penetrate the locking holes 311, 350 that communicate with each other in the radial direction, and locks and fixes the tip side small tube member 31 and the locking plate 35. The locking pin 36 (361) is assembled through the locking holes 322 and 351 that communicate with each other in the radial direction, and locks and fixes the proximal end side small tube member 32 and the locking plate 35.

係止ピン３６（３６０，３６１）は、その具体的な形状が限定されない。係止ピン３６（３６０，３６１）は、係止穴３１１，３５０及び係止穴３２２，３５１の内周形状と一致する外周形状（具体的には、円柱形状）を有する。係止ピン３６（３６０，３６１）は、頭部（径方向外方側の端部）が拡径したリベット形状等の形状であってもよい。 The specific shape of the locking pin 36 (360, 361) is not limited. The locking pins 36 (360, 361) have an outer peripheral shape (specifically, a cylindrical shape) that matches the inner peripheral shape of the locking holes 311, 350 and the locking holes 322, 351. The locking pin 36 (360, 361) may have a shape such as a rivet shape in which the head (end portion on the outer side in the radial direction) has an enlarged diameter.

（効果）
本形態の測温プローブ１は、内部保護管３の係合構造が異なること以外は、実施形態１と同様な構成を有しており、実施形態１と同様な効果を発揮する。
本形態の測温プローブ１における係合手段は、軸方向に延びる板状を有するとともに、隣接した先端側小管部材３１と基端側小管部材３２（隣接した２つの小管部材）の隣接した端部同士をつなぐように配された係止板３５と、係止板３５を厚さ方向で貫通し、その内径側の先端が先端側小管部材３１（一方の小管部材）に係止する係止ピン３６０（第１ピン）と、係止板３５を厚さ方向で貫通し、その内径側の先端が基端側小管部材３２（他方の小管部材）に係止する係止ピン３６１（第２ピン）と、を有している。この構成によると、先端側小管部材３１、基端側小管部材３２及び係止板３５が係止ピン３６（３６０，３６１）で係止され、固定される。すなわち、先端側小管部材３１と基端側小管部材３２が簡単な構成で強固に固定された内部保護管３となる。 (effect)
The temperature measuring probe 1 of this embodiment has the same configuration as that of the first embodiment except that the engaging structure of the internal protection tube 3 is different, and exhibits the same effect as that of the first embodiment.
The engaging means in the temperature measuring probe 1 of this embodiment has a plate shape extending in the axial direction, and is adjacent to the end end side small tube member 31 and the proximal end side small tube member 32 (two adjacent small tube members). A locking pin 35 arranged so as to connect each other and a locking pin that penetrates the locking plate 35 in the thickness direction and locks the tip on the inner diameter side to the tip side small tube member 31 (one small tube member). Locking pin 361 (second pin) that penetrates 360 (first pin) and the locking plate 35 in the thickness direction and locks the tip on the inner diameter side to the proximal end side small tube member 32 (the other small tube member). ) And. According to this configuration, the distal end side capillary member 31, the proximal end side capillary member 32 and the locking plate 35 are locked and fixed by the locking pins 36 (360, 361). That is, the internal protective tube 3 in which the distal end side tubular member 31 and the proximal end side tubular member 32 are firmly fixed in a simple configuration.

［実施形態２の変形形態］
実施形態２は、軸方向に並んだ先端側小管部材３１と基端側小管部材３２とを係止板３５と係止ピン３６（３６０，３６１）とで係止・固定しているが、先端側小管部材３１と基端側小管部材３２との双方に係止できるものであれば係止板３５の数は限定されない。係止板３５は、２つ以上としてもよい。２つ以上の複数の係止板３５を用いる場合、それぞれの係止板３５は、周方向で等間隔の位置に配することが好ましい。
係止板３５は、帯状の長手方向が軸方向に沿って延びた形状だけでなく、帯状の長手方向が内部保護管３の外周面をらせん状に沿って延びた形状であってもよい。 [Modified form of embodiment 2]
In the second embodiment, the tip end side small tube member 31 and the proximal end side small tube member 32 arranged in the axial direction are locked and fixed by the locking plate 35 and the locking pin 36 (360, 361), but the tip is locked. The number of locking plates 35 is not limited as long as it can be locked to both the side small tube member 31 and the proximal end side small tube member 32. The number of locking plates 35 may be two or more. When two or more locking plates 35 are used, it is preferable that the respective locking plates 35 are arranged at equidistant positions in the circumferential direction.
The locking plate 35 may have a shape in which the strip-shaped longitudinal direction extends along the axial direction, or a shape in which the strip-shaped longitudinal direction extends along the outer peripheral surface of the internal protection tube 3 in a spiral shape.

係止板３５は、帯状の幅方向が内部保護管３の外周面の全周にわたって形成された円筒形状や、周方向の一部が切れた円筒形状をなしていてもよい。つまり、軸方向に垂直な断面の断面形状が円形形状や、Ｃ字形状であってもよい。 The locking plate 35 may have a cylindrical shape in which the width direction of the band is formed over the entire circumference of the outer peripheral surface of the internal protection tube 3, or a cylindrical shape in which a part of the peripheral direction is cut off. That is, the cross-sectional shape of the cross section perpendicular to the axial direction may be circular or C-shaped.

さらに、係止板３５を、先端側小管部材３１や基端側小管部材３２に係止する係止ピン３６の数についても限定されない。係止ピン３６（及び係止穴３１１，３５０，３２２，３５１）の数が多くなれば、係止板３５を先端側小管部材３１や基端側小管部材３２に係止する係止箇所が多くなり、より確実に先端側小管部材３１と基端側小管部材３２を係止板３５に固定できる。 Further, the number of locking pins 36 that lock the locking plate 35 to the tip end side small tube member 31 and the proximal end side small tube member 32 is also not limited. If the number of locking pins 36 (and locking holes 311, 350, 322, 351) is large, there are many locking points for locking the locking plate 35 to the tip end side small tube member 31 and the proximal end side small tube member 32. Therefore, the tip end side small tube member 31 and the proximal end side small tube member 32 can be more reliably fixed to the locking plate 35.

［実施形態３］
本形態は、内部保護管３の係合手段（係合部の構成）が異なること以外は、実施形態１と同様な構成の測温プローブ１である。本形態で特に言及しない構成は、実施形態１と同様な構成である。本形態の測温プローブ１の内部保護管３の係合部近傍の構成を図８に示す。 [Embodiment 3]
This embodiment is a temperature measuring probe 1 having the same configuration as that of the first embodiment except that the engaging means (configuration of the engaging portion) of the internal protection tube 3 is different. The configuration not particularly mentioned in this embodiment is the same as that of the first embodiment. FIG. 8 shows a configuration in the vicinity of the engaging portion of the internal protection tube 3 of the temperature measuring probe 1 of this embodiment.

内部保護管３は、先端側小管部材３１の基端側の端部に雄ネジ部３１０が、基端側小管部材３２の先端側の端部に雌ネジ部３２１が、それぞれ形成されている。そして、雄ネジ部３１０と雌ネジ部３２１が螺合し、先端側小管部材３１と基端側小管部材３２が一体に係合・固定された内部保護管３が形成されている。 The internal protective tube 3 has a male threaded portion 310 formed at the distal end side of the distal end side capillary member 31 and a female threaded portion 321 formed at the distal end side of the proximal end side tubular member 32, respectively. Then, the male screw portion 310 and the female screw portion 321 are screwed together to form an internal protective tube 3 in which the tip end side small tube member 31 and the proximal end side small tube member 32 are integrally engaged and fixed.

先端側小管部材３１は、実施形態１の変形形態の場合と同様に、基端側の端部が縮径し、その外周面に雄ネジ部３１０が形成されている。具体的には、図８に示すように、先端側小管部材３１は、基端側の端部が他の部分（先端部３０を除く）よりも縮径した円筒形状に形成され、その外周面に雄ネジ部３１０が形成されている。雄ネジ部３１０の雄ネジは、その最外径が、雄ネジ部３１０以外の円筒形状の部分の外径より小さく形成されている。 As in the case of the modified form of the first embodiment, the tip-side small tube member 31 has a reduced diameter at the base end-side end, and a male screw portion 310 is formed on the outer peripheral surface thereof. Specifically, as shown in FIG. 8, the tip-side small tube member 31 is formed in a cylindrical shape in which the end portion on the proximal end side has a diameter smaller than that of other portions (excluding the tip portion 30), and the outer peripheral surface thereof. A male screw portion 310 is formed on the surface. The outermost diameter of the male screw of the male screw portion 310 is formed to be smaller than the outer diameter of the cylindrical portion other than the male screw portion 310.

基端側小管部材３２は、先端側の端部の内周面に、雄ネジ部３１０に螺合する雌ネジ部３２１が形成されている。具体的には、図８に示すように、基端側小管部材３２は、先端側の端部が他の部分よりも拡径した内径の円筒形状に形成され、その拡径した部分の内周面に雌ネジ部３２１が形成されている。 The proximal end side small tube member 32 has a female threaded portion 321 screwed into the male threaded portion 310 formed on the inner peripheral surface of the end end on the distal end side. Specifically, as shown in FIG. 8, the proximal end side small tube member 32 is formed in a cylindrical shape having an inner diameter whose end portion on the distal end side has a larger diameter than other portions, and the inner circumference of the enlarged diameter portion. A female screw portion 321 is formed on the surface.

先端側小管部材３１と基端側小管部材３２のそれぞれは、内部保護管３を形成したときに、連続した滑らかな外周面を形成するように、雄ネジ部３１０及び雌ネジ部３２１が形成されていない部分（先端部３０を除く）は、外径が同じとなるように形成されている。内部保護管３は、雄ネジ部３１０と雌ネジ部３２１とが螺合して内部保護管３を形成したときに、その内周面及び外周面が連続した滑らかな面（軸方向で凹凸がない面）を形成する。
なお、本形態では、先端側小管部材３１に雄ネジ部３１０が、基端側小管部材３２に雌ネジ部３２１が、それぞれ形成されているが、この形態に限定されるものではなく、雄ネジ部と雌ネジ部をそれぞれ逆の小管部材に形成してもよい。具体的には、先端側小管部材３１の基端側の端部に雌ネジ部を、基端側小管部材３２の先端側の端部に雌ネジ部を、それぞれ形成してもよい。 The male threaded portion 310 and the female threaded portion 321 of each of the tip end side small tube member 31 and the proximal end side small tube member 32 are formed so as to form a continuous smooth outer peripheral surface when the internal protection tube 3 is formed. The non-existing portion (excluding the tip portion 30) is formed so that the outer diameter is the same. When the male threaded portion 310 and the female threaded portion 321 are screwed together to form the internal protective tube 3, the internal protective tube 3 has a smooth surface (unevenness in the axial direction) in which the inner peripheral surface and the outer peripheral surface thereof are continuous. No surface) is formed.
In this embodiment, the male screw portion 310 is formed on the tip side small tube member 31 and the female thread portion 321 is formed on the proximal end side small tube member 32, but the present invention is not limited to this form and is not limited to this form. The portion and the female screw portion may be formed on opposite small tube members. Specifically, a female threaded portion may be formed at the distal end side of the distal end side capillary member 31, and a female threaded portion may be formed at the distal end side of the proximal end side capillary member 32.

（効果）
本形態の測温プローブ１は、内部保護管３の係合構造が異なること以外は、実施形態１と同様な構成を有しており、実施形態１と同様な効果を発揮する。
本形態の測温プローブ１は、係合手段が、先端側小管部材３１の雄ネジ部３１０（隣接した２つの小管部材のうち、一方の小管部材の端部に形成された雄ネジ部）と、基端側小管部材３２の雌ネジ部３２１（隣接した２つの小管部材のうち、他方の小管部材の端部の端部に形成された、雄ネジ部と螺合する雌ネジ部）と、からなる。この構成によると、先端側小管部材３１と基端側小管部材３２を簡単な構成で強固に係合し固定することができる。
さらに、実施形態１の変形形態と同様に、内部保護管３の外周面と外部保護管４の内周面との間のすき間を小さくすることができ、内部保護管３と外部保護管４とが互いに変形を規制する効果をより発揮できる。 (effect)
The temperature measuring probe 1 of this embodiment has the same configuration as that of the first embodiment except that the engaging structure of the internal protection tube 3 is different, and exhibits the same effect as that of the first embodiment.
In the temperature measuring probe 1 of this embodiment, the engaging means is the male screw portion 310 of the tip side small tube member 31 (the male screw portion formed at the end of one of the two adjacent small tube members). , The female threaded portion 321 of the proximal end side capillary member 32 (the female threaded portion formed at the end of the end of the other small tube member of the two adjacent small tube members) and the female threaded portion screwed with the male threaded portion. Consists of. According to this configuration, the distal end side capillary member 31 and the proximal end side capillary member 32 can be firmly engaged and fixed with a simple configuration.
Further, as in the modified form of the first embodiment, the gap between the outer peripheral surface of the inner protection tube 3 and the inner peripheral surface of the outer protection tube 4 can be reduced, and the inner protection tube 3 and the outer protection tube 4 can be reduced. Can exert the effect of regulating deformation with each other.

［実施形態４］
本形態の測温プローブは、内部保護管３が３つの小管部材から形成されていること以外は実施形態１と同様な構成の測温プローブ１である。本形態で特に言及しない構成は、実施形態１と同様な構成である。本形態の測温プローブ１の内部保護管３の構成を図９に示す。 [Embodiment 4]
The temperature measuring probe of this embodiment is a temperature measuring probe 1 having the same configuration as that of the first embodiment except that the internal protection tube 3 is formed of three small tube members. The configuration not particularly mentioned in this embodiment is the same as that of the first embodiment. FIG. 9 shows the configuration of the internal protection tube 3 of the temperature measuring probe 1 of this embodiment.

内部保護管３は、先端側小管部材３１、中間小管部材３７及び基端側小管部材３２が軸方向に沿って配列した状態で、それぞれ係合し固定して形成されている。内部保護管３において、先端側小管部材３１と中間小管部材３７の係合手段、及び基端側小管部材３２と中間小管部材３７の係合手段は、いずれも実施形態１と同様な係合手段としての係合筒３３である。すなわち、各小管部材３１，３２，３７の端部の雄ネジ部と係合筒３３の雌ネジ部とが螺合することで、各小管部材３１，３２，３７が係合し、固定される。 The internal protective tube 3 is formed by engaging and fixing the tip side small tube member 31, the intermediate small tube member 37, and the proximal side small tube member 32 in a state of being arranged along the axial direction. In the internal protection tube 3, the engaging means of the distal end side small tube member 31 and the intermediate small tube member 37 and the engaging means of the proximal end side small tube member 32 and the intermediate small tube member 37 are all the same engaging means as in the first embodiment. The engaging cylinder 33 as. That is, by screwing the male threaded portion at the end of each small tube member 31, 32, 37 and the female threaded portion of the engaging cylinder 33, the small tube members 31, 32, 37 are engaged and fixed. ..

中間小管部材３７は、軸方向の両端部に雄ネジ部が形成されていること以外は、実施形態１の基端側小管部材３２と同様な円筒形状の部材である。中間小管部材３７の両端部の雄ネジ部は、実施形態１の各雄ネジ部３１０，３２０と同様な構成である。 The intermediate small tube member 37 is a cylindrical member similar to the proximal end side small tube member 32 of the first embodiment, except that male screw portions are formed at both ends in the axial direction. The male threaded portions at both ends of the intermediate small tube member 37 have the same configuration as the male threaded portions 310 and 320 of the first embodiment.

中間小管部材３７の数は限定されない。２本以上の複数としてもよい。２つ以上の中間小管部材３７のそれぞれは、実施形態１と同様に雄ネジ部及び係合筒部の雌ネジ部とが螺合することより係合・固定することができる。 The number of intermediate small tube members 37 is not limited. It may be a plurality of two or more. Each of the two or more intermediate small tube members 37 can be engaged and fixed by screwing the male screw portion and the female screw portion of the engaging cylinder portion as in the first embodiment.

（効果）
本形態は、先端側小管部材３１と中間小管部材３７の係合手段、及び基端側小管部材３２と中間小管部材３７の係合手段が実施形態１と同様に形成されており、実施形態１と同様な効果を発揮する。
本形態の測温プローブ１は、中間小管部材３７を有することで、実施形態１の内部保護管よりも、長尺の内部保護管３を形成できる。すなわち、軸方向長さがより長い測温プローブとなる。すなわち、実施形態１の測温プローブよりも、測温対象物（金属溶湯）の湯面（スラグライン）からより深い位置での温度を測定することができる。 (effect)
In this embodiment, the engaging means of the distal end side capillary member 31 and the intermediate capillary member 37 and the engaging means of the proximal end side capillary member 32 and the intermediate capillary member 37 are formed in the same manner as in the first embodiment. It has the same effect as.
By having the intermediate small tube member 37, the temperature measuring probe 1 of the present embodiment can form the internal protection tube 3 which is longer than the internal protection tube of the first embodiment. That is, the temperature measuring probe has a longer axial length. That is, it is possible to measure the temperature at a position deeper than the temperature measuring probe of the first embodiment from the molten metal surface (slag line) of the temperature measuring object (metal molten metal).

本形態では、先端側小管部材３１と中間小管部材３７の係合手段、及び基端側小管部材３２と中間小管部材３７の係合手段は、実施形態１の係合手段を用いているが、この係合手段に限定されない。上記の各形態から任意の係合手段を選択することができる。１つの測温プローブ１で、異なる複数の係合手段を用いてもよい。 In the present embodiment, the engaging means of the distal end side small tube member 31 and the intermediate small tube member 37 and the engaging means of the proximal end side small tube member 32 and the intermediate small tube member 37 use the engaging means of the first embodiment. It is not limited to this engaging means. Any engaging means can be selected from each of the above forms. A plurality of different engaging means may be used in one temperature measuring probe 1.

［その他の変形形態］
上記の各形態では、外部保護管４が円筒形状を有しているが、この形状に限定されない。外部保護管４は、内部に内部保護管３を収容する有底筒状の形状を有していてもよい。例えば、内部保護管３と同様に先端が閉じた形状としてもよい。
保護キャスタブル５についても、外部保護管４の外周を覆う円筒形状を有しているが、この形状に限定されない。保護キャスタブル５は、内部保護管３及び外部保護管４の外周面を覆う形状を有していてもよい。 [Other variants]
In each of the above forms, the external protective tube 4 has a cylindrical shape, but is not limited to this shape. The external protective tube 4 may have a bottomed tubular shape that houses the internal protective tube 3 inside. For example, the shape may be such that the tip is closed as in the internal protection tube 3.
The protective castable 5 also has a cylindrical shape that covers the outer circumference of the external protective tube 4, but is not limited to this shape. The protective castable 5 may have a shape that covers the outer peripheral surfaces of the internal protective tube 3 and the external protective tube 4.

１：測温プローブ
２：熱電対、２０：測温部、２１：絶縁管、２２：通孔
３：内部保護管、３０：先端部、３１：先端側小管部材、３２：基端側小管部材、３３：係合筒、３４：係合部、３５：係止板、３６：係止ピン、３７：中間小管部材
４：外部保護管、４０：先端側管部材、４１：基端側管部材、４２：接合部、４３：充填材
５：保護キャスタブル
６：フランジ 1: Temperature measuring probe 2: Thermocouple, 20: Temperature measuring part, 21: Insulated tube, 22: Through hole 3: Internal protection tube, 30: Tip part, 31: Tip side small tube member, 32: Base end side small tube member , 33: Engagement tube, 34: Engagement part, 35: Locking plate, 36: Locking pin, 37: Intermediate small tube member 4: External protection tube, 40: Tip side tube member, 41: Base end side tube member , 42: Joint, 43: Filler 5: Protective castable 6: Flange

Claims (8)

先端部が閉塞した有底筒状を有し、焼成体で形成された内部保護管と、
前記内部保護管の内部に配された、測温対象物の温度を測定する測温部を有する温度計と、
前記内部保護管を内部に配する筒状を有し、セラミックスで形成された外部保護管と、
を有し、
前記内部保護管は、軸方向に配列した複数の小管部材と、隣接した２つの前記小管部材を一体に係合する係合手段と、を有することを特徴とする測温プローブ。 An internal protective tube having a bottomed tubular shape with a closed tip and formed of a fired body,
A thermometer arranged inside the internal protection tube and having a temperature measuring unit for measuring the temperature of the object to be measured, and a thermometer.
An external protective tube having a tubular shape in which the internal protective tube is arranged and made of ceramics, and an external protective tube.
Have,
The internal protection tube is a temperature measuring probe comprising a plurality of small tube members arranged in the axial direction and an engaging means for integrally engaging two adjacent small tube members. 前記焼成体は、金属とセラミックスの複合材料，Ｓｉ３Ｎ４，サイアロンの少なくとも１種よりなる請求項１記載の測温プローブ。 The sintered body, metal and composite materials of ceramics, Si 3 N 4, comprising at least one sialon claim 1 temperature measuring probe according. 前記外部保護管は、軸方向に配列した複数の管部材と、隣接した２つの前記管部材を接合する接合材と、を有し、
２つの前記管部材が接合した接合部は、前記測温プローブにおける軸方向での位置が、２つの前記小管部材が係合した係合部と異なっている請求項１〜２のいずれか１項に記載の測温プローブ。 The external protective tube has a plurality of tube members arranged in the axial direction and a joining material for joining two adjacent tube members.
One of claims 1 and 2, wherein the joint portion in which the two tube members are joined differs from the engaging portion in which the two small tube members are engaged in the axial position in the temperature measuring probe. The temperature measuring probe described in. 前記係合手段は、
隣接した２つの前記小管部材の近接した端部のそれぞれに形成された雄ネジ部と、
２つの前記雄ネジ部の一方に螺合する雌ネジ部を一方の端部に、２つの前記雄ネジ部の他方に螺合する雌ネジ部を他方の端部に、それぞれ有する筒状の係合筒と、
からなる請求項１〜３のいずれか１項に記載の測温プローブ。 The engaging means is
A male threaded portion formed at each of the adjacent ends of the two adjacent small tube members,
A tubular engagement having a female threaded portion screwed into one of the two male threaded portions at one end and a female threaded portion screwing into the other of the two male threaded portions at the other end. Combined cylinder and
The temperature measuring probe according to any one of claims 1 to 3. 前記係合手段は、
軸方向にのびる板状を有するとともに、隣接した２つの前記小管部材の隣接した端部同士をつなぐように前記小管部材の外周に配置された係止板と、
前記係止板を厚さ方向で貫通し、その内径側の先端が一方の前記小管部材に係止する第１ピンと、
前記係止板を厚さ方向で貫通し、その内径側の先端が他方の前記小管部材に係止する第２ピンと、
からなる請求項１〜３のいずれか１項に記載の測温プローブ。 The engaging means is
A locking plate having a plate shape extending in the axial direction and arranged on the outer periphery of the small tube member so as to connect the adjacent ends of the two adjacent small tube members.
A first pin that penetrates the locking plate in the thickness direction and has a tip on the inner diameter side that locks to one of the small tube members.
A second pin that penetrates the locking plate in the thickness direction and has a tip on the inner diameter side that locks to the other small tube member.
The temperature measuring probe according to any one of claims 1 to 3. 隣接した２つの前記小管部材のそれぞれは、軸方向に垂直な面に沿って形成された端面を有し、
対向する２つの前記端面が密着した状態で係合される請求項１〜５のいずれか１項に記載の測温プローブ。 Each of the two adjacent small tube members has an end face formed along a plane perpendicular to the axial direction.
The temperature measuring probe according to any one of claims 1 to 5, wherein the two opposing end faces are engaged in close contact with each other. 前記係合手段は、
隣接した２つの前記小管部材のうち、一方の前記小管部材の端部に形成された雄ネジ部と、
他方の前記小管部材の端部に形成された、前記雄ネジ部と螺合する雌ネジ部と、
からなる請求項１〜３のいずれか１項に記載の測温プローブ。 The engaging means is
Of the two adjacent small tube members, a male threaded portion formed at the end of one of the small tube members,
A female threaded portion formed at the end of the other small tube member and screwed with the male threaded portion, and a female threaded portion.
The temperature measuring probe according to any one of claims 1 to 3. 不定形耐火物よりなり、前記外部保護管の外周面を被覆する、保護キャスタブルを有する請求項１〜７のいずれか１項に記載の測温プローブ。 The temperature measuring probe according to any one of claims 1 to 7, which is made of an amorphous refractory and has a protective castable that covers the outer peripheral surface of the external protective tube.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5597540U (en) * 1978-12-26 1980-07-07
JP2006242601A (en) * 2005-02-28 2006-09-14 Tokyo Yogyo Co Ltd Probe device for temperature measurement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5597540U (en) * 1978-12-26 1980-07-07
JP2006242601A (en) * 2005-02-28 2006-09-14 Tokyo Yogyo Co Ltd Probe device for temperature measurement

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