JP5092701B2 - Molten metal sampling probe - Google Patents

Molten metal sampling probe Download PDF

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JP5092701B2
JP5092701B2 JP2007292727A JP2007292727A JP5092701B2 JP 5092701 B2 JP5092701 B2 JP 5092701B2 JP 2007292727 A JP2007292727 A JP 2007292727A JP 2007292727 A JP2007292727 A JP 2007292727A JP 5092701 B2 JP5092701 B2 JP 5092701B2
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JP2009121822A (en
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幸生 寺内
俊夫 田村
貴樹 麻生
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ヘレウス・エレクトロナイト株式会社
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Description

本発明は、溶融金属のサンプルを取得して元素分析できるとともにカーボンの凝固温度測定を行うことのできる溶融金属試料採取プローブに関する。   The present invention relates to a molten metal sampling probe capable of obtaining a molten metal sample and performing elemental analysis and measuring a solidification temperature of carbon.

この種の溶融金属試料採取プローブは、従来、試料流入口を備える筒状本体部内に金属製の溶融金属採取室と該溶融金属採取室内に試料流入口を通じて流入する溶融金属試料の凝固温度を測定するための熱電対を設けたものが種々提供されている（例えば、特許文献１、２参照。）。これら従来からの溶融金属試料採取プローブは、溶融金属が流入する採取室が上端開口した採取容器より構成され、上記凝固温度の測定とともに、該採取容器内で凝固したサンプルが後で取り出され元素分析等される。   This type of molten metal sampling probe conventionally measures the solidification temperature of a molten metal sampling chamber made of metal into a cylindrical main body provided with a sample inlet and the molten metal sample flowing into the molten metal sampling chamber through the sample inlet. Various types of thermocouples are provided (see, for example, Patent Documents 1 and 2). These conventional molten metal sampling probes are composed of a sampling container whose upper end is opened in a sampling chamber into which molten metal flows, and along with the measurement of the solidification temperature, the sample solidified in the sampling container is later taken out and elemental analysis is performed. Is equal.

このサンプル取り出しに際し、とくに自動サンプル搬送装置が設置されている製鉄所においてはロボットハンドでプローブごと採取容器の位置を把持して固定し、上部を切断してプローブを逆転させることによりサンプルを取り出すが、このプローブ固定の際、採取容器の強度が不足していると採取室が押し潰され、中の凝固サンプルに圧力がかかり取り出せなくなる虞がある。また、採取容器自体、高温に耐える必要がある。よって、採取容器は最低限の厚さ寸法が維持されている。しかしながら、このような採取容器に流入した溶融金属の凝固温度を測定すると、後述する図５（ｂ）のグラフに示すように凝固温度波形のフラット部分が短く不安定であり、測定精度の向上に一定の限界があった。   When taking out this sample, particularly in an ironworks where an automatic sample transport device is installed, the position of the collection container with the probe is held and fixed with a robot hand, and the sample is taken out by cutting the upper part and reversing the probe. When fixing the probe, if the strength of the collection container is insufficient, the collection chamber may be crushed and pressure may be applied to the coagulated sample therein, making it impossible to remove it. Also, the collection container itself needs to withstand high temperatures. Therefore, the minimum thickness dimension of the collection container is maintained. However, when the solidification temperature of the molten metal flowing into such a sampling container is measured, the flat portion of the solidification temperature waveform is short and unstable as shown in the graph of FIG. There was a certain limit.

特開２０００−２１４１２７号公報JP 2000-214127 A 特開２０００−２８４３８号公報JP 2000-28438 A

そこで、本発明が前述の状況に鑑み、解決しようとするところは、測定精度をより向上できる溶融金属試料採取プローブを提供する点にある。   Therefore, in view of the above-described situation, the present invention is to provide a molten metal sampling probe that can further improve measurement accuracy.

本発明者は、前述の課題解決のために鋭意検討した結果、溶融金属採取室を構成している採取容器を薄型化することで、流入した溶融金属試料が冷め難くなり凝固温度波形のフラット部分を長く安定化させることが可能になるとともに、薄型化による採取容器の強度の低下については該容器を隙間を介した二重構造とすることで冷め難くさを維持しつつ強度を補強できる点を見出し、本発明を完成するに至った。   As a result of diligent study to solve the above-mentioned problems, the present inventor has made the collection container constituting the molten metal collection chamber thinner, so that the molten metal sample that has flowed in becomes difficult to cool and the flat portion of the solidification temperature waveform It is possible to reinforce the strength while maintaining the difficulty of cooling by making the container a double structure through a gap with respect to the decrease in strength of the sampling container due to the thinning. The headline and the present invention were completed.

すなわち本発明は、試料流入口を備える筒状本体部内に、金属製の溶融金属採取室を設けるとともに、先端測温部が前記溶融金属採取室内に位置され、該溶融金属採取室内に前記試料流入口を通じて流入する溶融金属試料の凝固温度を測定するための熱電対を設けた溶融金属試料採取プローブにおいて、前記溶融金属採取室を、内側の金属製薄型採取容器と、該採取容器に隙間を介して外装される金属製外装体とより構成したことを特徴とする溶融金属試料採取プローブである。   That is, the present invention provides a molten metal collection chamber made of metal in a cylindrical main body having a sample inlet, and a tip temperature measuring section is located in the molten metal collection chamber, and the sample flow is placed in the molten metal collection chamber. In the molten metal sampling probe provided with a thermocouple for measuring the solidification temperature of the molten metal sample flowing through the inlet, the molten metal sampling chamber is connected to the inner metal thin sampling container and the sampling container through a gap. A molten metal sampling probe characterized by comprising a metal exterior body that is exteriorly mounted.

ここで、前記金属製薄型採取容器を、底部から高さ方向に沿って次第に薄肉に形成し、前記熱電対の測温部が位置する高さでの肉厚を２．０〜４．０ｍｍに設定することが好ましい。   Here, the metal thin sampling container is gradually formed to be thin along the height direction from the bottom, and the thickness at the height at which the temperature measuring part of the thermocouple is located is 2.0 to 4.0 mm. It is preferable to set.

また、前記薄型採取容器と金属製外装体との間に、全周にわたって紙製シート体を介装したものが好ましい。   Further, it is preferable that a paper sheet body is interposed over the entire circumference between the thin sampling container and the metal exterior body.

また、前記金属製外装体を、該薄型採取容器の外径寸法よりも大きな内径寸法を有する両端開放の筒状部材としたものが好ましい。   Moreover, what made the said metal exterior body the cylindrical member of both ends open | released which has a larger internal diameter dimension than the outer diameter dimension of this thin collection container is preferable.

また、前記薄型採取容器の底部に、外側面が前記金属製外装体の外側面と略面一となる紙製の筒状支持体を取り付け、該筒状支持体の前記薄型採取容器底部より外方に突出しているフランジ部分で前記薄型採取容器に装着した金属製外装体を係止するものが好ましい。   In addition, a paper cylindrical support whose outer surface is substantially flush with the outer surface of the metal outer casing is attached to the bottom of the thin sampling container, and is outside the bottom of the thin sampling container of the cylindrical support. It is preferable that the metal outer body mounted on the thin collection container is locked by a flange portion protruding in the direction.

特に、前記薄型採取容器の外側面より底部側に延びる金属製薄板を単又は複数設け、該金属製薄板に対して前記筒状支持体を固定したものが好ましい。   In particular, it is preferable to provide one or a plurality of thin metal plates extending from the outer surface of the thin collection container to the bottom side, and fix the cylindrical support to the thin metal plate.

更に、前記筒状支持体を、外側面が前記薄型採取容器の外側面と略面一となる筒状の内側支持体と、該内側支持体に外装され、外側面が前記金属製外装体の外側面と略面一となる外側支持体とより二重筒構造に構成し、前記金属製薄板をこれら内側支持体と外側支持体の間に挟み込んで固定したものが好ましい。   Further, the cylindrical support is covered with a cylindrical inner support whose outer surface is substantially flush with the outer surface of the thin collection container, and the outer support is covered with the inner support. It is preferable that the outer support is substantially flush with the outer surface, and that the metal sheet is sandwiched and fixed between the inner support and the outer support.

以上にしてなる本願発明に係る溶融金属試料採取プローブは、内側の金属製薄型採取容器と該採取容器に隙間を介して外装される金属製外装体とで溶融金属採取室を構成したので、薄型の採取容器内に流入した溶融金属を冷め難くし、カーボン凝固温度のフラット部分（波形平衡部）が長く安定するようにして測定精度を著しく向上させることができると同時に、その外側に金属製外装体を設けているので、薄型化した溶融金属採取室の機械的強度を確実に補強し、ロボットハンドで把持しても変形せずに凝固したサンプルをスムーズに取り出すことができる。また、両者間には隙間が存在するため薄型採取容器から金属製外装体への熱伝導を防止でき、上記溶融金属の冷め難くい現象をそのまま維持でき、金属製外装体の伝熱による変形も防止できる。   Since the molten metal sampling probe according to the present invention configured as described above has a molten metal sampling chamber composed of an inner metal thin sampling container and a metal outer casing that is externally mounted on the sampling container through a gap, the thin metal sampling chamber is thin. Makes it difficult to cool the molten metal that has flowed into the sampling container and stabilizes the flat part (waveform equilibrium part) of the carbon solidification temperature for a long time, and at the same time, the measurement accuracy can be significantly improved. Since the body is provided, the mechanical strength of the thinned molten metal collection chamber is surely reinforced, and the solidified sample can be smoothly taken out without being deformed even if it is grasped by the robot hand. In addition, since there is a gap between the two, heat conduction from the thin collection container to the metal outer body can be prevented, the phenomenon that the molten metal is difficult to cool can be maintained as it is, and deformation of the metal outer body due to heat transfer is also possible. Can be prevented.

また、金属製薄型採取容器を底部から高さ方向に沿って次第に薄肉に形成し、前記熱電対の測温部が位置する高さでの肉厚を２．０〜４．０ｍｍに設定したので、最低限の強度を維持しつつ少なくとも熱電対の測温部付近の溶融金属が冷め難くなる。   In addition, since the metal thin collection container is gradually formed thin from the bottom along the height direction, the thickness at the height where the thermocouple temperature measuring part is located is set to 2.0 to 4.0 mm. In addition, it is difficult to cool the molten metal at least near the temperature measuring portion of the thermocouple while maintaining the minimum strength.

また、薄型採取容器と金属製外装体との間に全周にわたって紙製シート体を介装したので、薄型採取容器と金属製外装体の直接接触が避けられ、接触による熱伝導によって溶融金属が冷めてしまうことを防止できるとともに、薄型採取容器及び金属製外装体が熱変形することも防止できる。   In addition, since a paper sheet body is interposed between the thin sampling container and the metal outer casing, the direct contact between the thin sampling container and the metal outer casing is avoided, and the molten metal is prevented by heat conduction due to the contact. While being able to prevent cooling, it can also prevent that a thin collection container and a metal exterior body are thermally deformed.

また、金属製外装体を薄型採取容器の外径寸法よりも大きな内径寸法を有する両端開放の筒状部材としたので、隙間を維持して熱伝導や金属製外装体の変形を回避できるとともに装着容易であり、試料採取後の取り外しも容易である。また、筒状部材で構成したので薄型採取容器を全周にわたり確実に補強することができる。   In addition, since the metal outer casing is a cylindrical member with both ends open and having an inner diameter larger than the outer diameter of the thin collection container, it is possible to avoid heat conduction and deformation of the metal outer casing while maintaining a gap. It is easy to remove after sampling. Moreover, since it comprised with the cylindrical member, a thin collection container can be reliably reinforced over the perimeter.

また、薄型採取容器の底部に外側面が前記金属製外装体の外側面と略面一となる紙製の筒状支持体を取り付け、該筒状支持体の前記薄型採取容器底部より外方に突出しているフランジ部分で前記薄型採取容器に装着した金属製外装体を係止したので、薄型採取容器底部からの伝熱が遮断でき、先端測温センサのリード線に伝熱してその測定を乱すことを防止できるとともに、金属製外装体を係止し、軸方向へのズレ落ちを防止できる。   In addition, a paper tubular support whose outer surface is substantially flush with the outer surface of the metal exterior body is attached to the bottom of the thin collection container, and the tubular support is outward from the bottom of the thin collection container. Since the metal outer body attached to the thin collection container is locked by the protruding flange part, heat transfer from the bottom of the thin collection container can be cut off, and heat is transferred to the lead wire of the tip temperature measurement sensor to disturb the measurement. In addition to being able to prevent this, it is possible to lock the metal exterior body and prevent the axial displacement.

また、薄型採取容器の外側面より底部側に延びる金属製薄板を単又は複数設け、該金属製薄板に対して前記筒状支持体を固定したので、筒状支持体を簡単な構造で確実に固定でき、熱伝導も金属製薄板を介した最小限の伝熱となる。   In addition, since one or more metal thin plates extending from the outer surface of the thin collection container to the bottom side are provided and the cylindrical support is fixed to the metal thin plate, the cylindrical support can be reliably secured with a simple structure. It can be fixed, and the heat conduction is minimal heat transfer through the metal sheet.

また、筒状支持体を外側面が前記薄型採取容器の外側面と略面一となる筒状の内側支持体と、該内側支持体に外装され、外側面が前記金属製外装体の外側面と略面一となる外側支持体とより二重筒構造に構成し、前記金属製薄板をこれら内側支持体と外側支持体の間に挟み込んで固定したので、筒状支持体を容易且つ確実に固定できる。   Further, the cylindrical support is covered with the cylindrical inner support whose outer surface is substantially flush with the outer surface of the thin collection container, and the outer surface is the outer surface of the metal outer package. And the outer support that is substantially flush with each other, and the metal thin plate is sandwiched and fixed between the inner support and the outer support so that the cylindrical support can be easily and reliably Can be fixed.

次に、本発明の実施形態を添付図面に基づき詳細に説明する。   Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

図１は、本発明に係る溶融金属試料採取プローブ１の概略構成を示す要部断面図であり、図１〜４は代表的実施形態を示し、図中符号１は溶融金属試料採取プローブ、２は筒状本体部、３はサブスリーブ、４は中軸管、５はカーボンセンサ、６は溶融金属採取室をそれぞれ示している。   FIG. 1 is a cross-sectional view of a principal part showing a schematic configuration of a molten metal sampling probe 1 according to the present invention. FIGS. 1 to 4 show typical embodiments. In FIG. Are a cylindrical main body, 3 is a sub-sleeve, 4 is a central shaft tube, 5 is a carbon sensor, and 6 is a molten metal collection chamber.

溶融金属試料採取プローブ１は、図１に示すように、筒状本体部２の先端側にセラミックヘッド１０を介して測温センサ１１のカバー部材１３が突設され、基端側に中軸管４が内嵌接合されるとともに、この中軸管４に外嵌接合し且つ後方の図示しないホルダーに連結するサブスリーブ３が設けられている。筒状本体部２の紙製外管２０の内部には、熱電対８よりなるカーボンセンサ５、溶融金属採取室６、アルミニウム等のキル材７０を有する脱酸室７などが設けられており、外管２０の脱酸室７に対応する位置には流入口２１が開設されている。流入口２１から流入した溶融金属は、脱酸室７内のキル材７０で脱酸された後、溶融金属採取室６内に流入し、カーボンセンサ５により凝固温度が測定されるとともに凝固したサンプルが元素分析されることとなる。   As shown in FIG. 1, the molten metal sampling probe 1 has a cover member 13 of a temperature measuring sensor 11 protruding from a distal end side of a cylindrical main body 2 via a ceramic head 10, and a central shaft tube 4 at a proximal end side. Are internally fitted and joined, and a sub-sleeve 3 is provided which is fitted to the central tube 4 and is connected to a holder (not shown) on the rear side. Inside the paper outer tube 20 of the cylindrical main body 2 are provided a carbon sensor 5 made of a thermocouple 8, a molten metal collection chamber 6, a deoxidation chamber 7 having a kill material 70 such as aluminum, and the like. An inlet 21 is opened at a position corresponding to the deoxidation chamber 7 of the outer tube 20. The molten metal flowing in from the inlet 21 is deoxidized by the kill material 70 in the deoxidizing chamber 7 and then flows into the molten metal collecting chamber 6 where the solidification temperature is measured by the carbon sensor 5 and solidified. Will be subjected to elemental analysis.

本発明では特に、溶融金属採取室６が内側の金属製薄型採取容器６０と該採取容器６０に隙間を介して外装される金属製外装体６１とで構成され、溶融金属採取室の溶融金属を冷め難くして熱電対８で測定されるカーボン凝固温度の波形平衡部を安定化させることができると同時に、薄型採取容器６０の機械的強度を確実に補強してロボットハンドによる把持でも採取室が変形せずにサンプルの取り出しを可能とし、隙間を介したことで金属製外装体への熱伝導及びそれによる外装体の変形も防止できることを特徴としている。   In the present invention, in particular, the molten metal collection chamber 6 is composed of an inner metal thin collection container 60 and a metal exterior body 61 that is externally attached to the collection container 60 via a gap, and the molten metal in the molten metal collection chamber is used. It is possible to stabilize the waveform equilibrium portion of the carbon solidification temperature measured by the thermocouple 8 by making it difficult to cool, and at the same time, the mechanical strength of the thin collection container 60 is surely reinforced and the collection chamber can be held even by gripping with a robot hand. It is characterized in that the sample can be taken out without being deformed, and the heat conduction to the metal exterior body and the deformation of the exterior body due to the gap can be prevented.

測温センサ１１は、鉄製のカバー部材１３で覆われた内部に、図示しないアーチ状の石英保護管付き熱電対を配設したものであり、その頂点付近に熱電対の測温接点を有した測温部を備えている。またカバー部材１３はさらに紙キャップ１２で覆われている。熱電対によって測定される測温値は、溶融金属の温度変化をリアルタイムに測温する為の手段として利用される。   The temperature sensor 11 has an arch-shaped thermocouple with a quartz protective tube (not shown) disposed in an interior covered with an iron cover member 13, and has a thermocouple temperature measuring contact near its apex. A temperature sensor is provided. The cover member 13 is further covered with a paper cap 12. The temperature measurement value measured by the thermocouple is used as a means for measuring the temperature change of the molten metal in real time.

またカーボンセンサ５は、先端の測温部８１が溶融金属採取室６内の深さ方向略中央に位置される熱電対８より構成されており、この熱電対８は脱酸室７でサポータ８０により固定されている。溶融金属採取室６内に溶融金属が流入すると、熱電対８によりその凝固温度が測定され、後方に位置する測定器により溶鋼中の炭素濃度が算出される。   The carbon sensor 5 is composed of a thermocouple 8 having a temperature measuring part 81 at the front end positioned substantially in the center in the depth direction in the molten metal collection chamber 6. The thermocouple 8 is a deoxidation chamber 7 and a supporter 80. It is fixed by. When the molten metal flows into the molten metal collection chamber 6, the solidification temperature is measured by the thermocouple 8, and the carbon concentration in the molten steel is calculated by a measuring instrument located at the rear.

溶融金属採取室６を構成している薄型採取容器６０は、図２に示すように底部から高さ方向に沿って次第に薄肉となるテーパー状に構成されており、具体的には熱電対８の測温部８１が位置する高さでの肉厚ｔは２．０〜４．０ｍｍとなるように設定され、少なくとも測温部８１にて溶融金属の冷却速度が遅くなるようにされている。２．０ｍｍよりも薄いと強度が不足し、４．０ｍｍよりも厚いと冷却速度が速くなり凝固温度波形に安定した平衡部が得られなくなる。肉厚ｔは、より好ましくは２．５〜３．０ｍｍ、更に好ましくは２．７〜２．８ｍｍに設定される。   As shown in FIG. 2, the thin collection container 60 constituting the molten metal collection chamber 6 has a tapered shape that gradually becomes thinner from the bottom along the height direction. The wall thickness t at the height at which the temperature measuring unit 81 is located is set to be 2.0 to 4.0 mm, and at least the temperature measuring unit 81 is configured to reduce the cooling rate of the molten metal. If it is thinner than 2.0 mm, the strength is insufficient, and if it is thicker than 4.0 mm, the cooling rate is increased and a stable equilibrium portion in the solidification temperature waveform cannot be obtained. The wall thickness t is more preferably set to 2.5 to 3.0 mm, still more preferably 2.7 to 2.8 mm.

ただし、溶融金属採取室の全体の容量は従来と同じに設定され、側壁が薄くなった分、底壁の厚みは従来より厚く設定されている。このように底壁が厚くなると底壁に接する底部分から先に冷却され、サンプル切断分析位置に引け巣（サンプル分析不良の原因となる）が生じにくくなるメリットがある。尚、側壁を上記のようなテーパー状とせず、高さ方向に沿って均一な肉薄構造とすることも可能である。   However, the entire capacity of the molten metal collection chamber is set to be the same as that of the conventional one, and the thickness of the bottom wall is set to be thicker than the conventional one because the side wall is thinned. When the bottom wall becomes thick in this way, there is an advantage that the bottom portion in contact with the bottom wall is cooled first, and a shrinkage nest (which causes sample analysis failure) hardly occurs at the sample cutting analysis position. In addition, it is also possible to make the side wall into a uniform thin structure along the height direction without forming the tapered shape as described above.

薄型採取容器６０の外側に装着される金属製外装体６１は、薄型採取容器６０の外径寸法よりも大きな内径寸法を有する両端開放の筒状部材で構成されており、内部の溶融金属が冷め難くい薄型の採取容器を採用しつつ金属製外装体６１を断熱性の高い空気層の隙間を介して外周に配置することで、断熱効果を維持するとともに金属製外装体６１自体の熱変形も防止し、薄型採取容器６０の機械的強度を確実に補強している。この隙間は、例えば１ｍｍ以下とされ、本例では０．７５ｍｍ程度の隙間が維持されている。このように外側の金属製外装体６１はロボットハンドによる把持によっても採取室が変形しないように補強するための部材であり、金属製の構造用強化パイプが用いられ、内側の薄型採取容器６０と略同じ高さに設定されている。符号６５は上端部において両者の隙間を封止するシール材である。   The metal outer body 61 attached to the outside of the thin collection container 60 is composed of a cylindrical member having an inner diameter larger than the outer diameter of the thin collection container 60 and having both ends open, and the molten metal inside is cooled. The metal exterior body 61 is disposed on the outer periphery through a gap of a highly heat-insulating air layer while adopting a difficult-to-thin collection container, so that the heat insulation effect is maintained and the metal exterior body 61 itself is also thermally deformed. The mechanical strength of the thin collection container 60 is reliably reinforced. This gap is, for example, 1 mm or less, and in this example, a gap of about 0.75 mm is maintained. As described above, the outer metal exterior body 61 is a member for reinforcing the collection chamber so as not to be deformed even by gripping by the robot hand, and a metal structural reinforcement pipe is used, and the inner thin collection container 60 and It is set to approximately the same height. Reference numeral 65 denotes a sealing material that seals the gap between the two at the upper end.

本例では金属製外装体６１を構造用強化パイプを切断した一体の筒状体で構成されているが、本発明はこのような外装体の構造に何ら限定されず、例えば図４（ａ）に示すように半割状等の分割部材６１Ａ，６１Ｂを組み合わせて構成したものや、図中（ｂ）に示すように長手方向に亘るスリット６１ｄを設けて断面視略Ｃ字状に構成したもの、或いは図中（ｃ）に示すように長手方向に延びるスリット６１ｄを周方向に複数設けたもの等、補強目的に適うものであれば種々の構造を採用できる。   In this example, the metal outer body 61 is formed of an integral cylindrical body obtained by cutting the structural reinforcing pipe. However, the present invention is not limited to the structure of such an outer body, and for example, FIG. As shown in FIG. 5, the one formed by combining split members 61A, 61B such as a half-like shape, or the one formed in a substantially C shape in sectional view by providing a slit 61d extending in the longitudinal direction as shown in FIG. Alternatively, various structures can be adopted as long as they are suitable for the purpose of reinforcement, such as those provided with a plurality of slits 61d extending in the longitudinal direction in the circumferential direction as shown in FIG.

薄型採取容器６０と金属製外装体６１との間には、図２に示すように全周にわたって紙製シート体６２が介装され、両者間の直接接触による熱伝導を回避している。紙製シート体６２は、図３に示すように薄型採取容器６０の外周部分に紙製テープを巻回したものであり、その巻回厚みは薄型採取容器６０と金属製外装体６１の隙間よりも薄く、且つ少なくとも後述の金属製薄板６３よりも厚く設定され、金属製薄板６３が金属製外装体６１の内周面に直接接触して該薄板を介して熱伝導が生じないようにされている。本例では薄型採取容器６０と金属製外装体６１との間の隙間（約０．７５ｍｍ）に対して紙製シート体６２の厚みを１／４〜１／３程度（約０．２ｍｍ）とし、接触を回避しつつ十分な空気層の厚みが維持されている。   As shown in FIG. 2, a paper sheet body 62 is interposed between the thin collection container 60 and the metal exterior body 61 so as to avoid heat conduction due to direct contact therebetween. As shown in FIG. 3, the paper sheet body 62 is obtained by winding a paper tape around the outer peripheral portion of the thin collection container 60, and the winding thickness is determined by the gap between the thin collection container 60 and the metal exterior body 61. And is set to be at least thicker than a metal thin plate 63, which will be described later, so that the metal thin plate 63 is in direct contact with the inner peripheral surface of the metal exterior body 61 so that heat conduction does not occur through the thin plate. Yes. In this example, the thickness of the paper sheet body 62 is set to about 1/4 to 1/3 (about 0.2 mm) with respect to the gap (about 0.75 mm) between the thin sampling container 60 and the metal exterior body 61. A sufficient air layer thickness is maintained while avoiding contact.

紙製シート体６２としては、このように紙製テープを巻回すること以外に、紙製筒体を薄型採取容器６０の外周面に装着するものや、その他の構成でもよい。また、紙製シート体６２は必ずしも必須の部材ではなく、例えば薄型採取容器６０の外周面上に突起部を周方向に複数設け、金属製外装体６１との接触を該突起部のみで最小限に抑える構造も好ましい。   As the paper sheet body 62, in addition to winding the paper tape in this manner, a paper cylinder body mounted on the outer peripheral surface of the thin collection container 60 or other configurations may be used. Further, the paper sheet body 62 is not necessarily an essential member. For example, a plurality of protrusions are provided in the circumferential direction on the outer peripheral surface of the thin collection container 60, and the contact with the metal exterior body 61 is minimized only by the protrusions. It is also preferable to have a structure that suppresses the above.

薄型採取容器６０の底部６０ｂには紙製の筒状支持体９が同軸状に取り付けられ、該筒状支持体９の薄型採取容器底部６０ｂよりも外方に突出しているフランジ部分９ｃで該薄型採取容器底部６０ｂに外装される金属製外装体６１の下端部が係止されている。筒状支持体９の外側面９ａは係止している金属製外装体６１の外側面６１ａと略面一となるように設定されているが、これはプローブ内に装着しやすいように考慮されたものであり、特に限定されるものではない。   A paper cylindrical support 9 is coaxially attached to the bottom 60 b of the thin collection container 60, and the thin portion is formed by a flange portion 9 c protruding outward from the thin collection container bottom 60 b of the cylindrical support 9. The lower end portion of the metal exterior body 61 that is exteriorly mounted on the collection container bottom portion 60b is locked. The outer side surface 9a of the cylindrical support body 9 is set to be substantially flush with the outer side surface 61a of the metal exterior body 61 that is locked, but this is considered to be easily mounted in the probe. There is no particular limitation.

筒状支持体９は、筒状の内側支持体９０とこれに外装される同じく筒状の外側支持体９１とよりなる二重筒構造とされており、内側支持体９０の外側面は薄型採取容器６０の外側面と略面一に設定され、外側支持体９１の外側面は上述のとおり金属製外装体６１の外側面と略面一に設定されている。そして、薄型採取容器６０の外側面上の１８０°対向する位置に溶接等でそれぞれ底部側に向けて金属製薄板６３，６３が延設され、該金属製薄板６３，６３をこれら内側支持体９０と外側支持体９１の間に挟み込み、外側支持体９１の外側方から打ち込んだステープル６４を介して内側支持体９０及び外側支持体９１が金属製薄板６３，６３に対して一体的に固定されている。   The cylindrical support 9 has a double cylinder structure including a cylindrical inner support 90 and a similar cylindrical outer support 91 that is externally mounted on the cylindrical support 9, and the outer surface of the inner support 90 is thinly sampled. The outer surface of the container 60 is set to be substantially flush with the outer face of the outer support 91, and the outer face of the metal exterior body 61 is set to be substantially flush with the outer surface of the metal outer casing 61 as described above. Metal thin plates 63 and 63 are extended toward the bottom side by welding or the like on the outer surface of the thin collection container 60 at 180 °, and the metal thin plates 63 and 63 are connected to the inner support 90. The inner support 90 and the outer support 91 are integrally fixed to the metal thin plates 63 and 63 via staples 64 that are sandwiched between the outer support 91 and the outer support 91 and driven from the outside. Yes.

尚、筒状支持体９はこのように二重筒構造とすることなく金属製薄板６３を差し込む等により薄型採取容器６０の底部に固定することも可能である。また、金属製薄板６３を介することなく直接接着等により固定してもよい。更に、ステープル以外にネジやリベット、釘等を用いて固定することも可能である。   The cylindrical support 9 can be fixed to the bottom of the thin collection container 60 by inserting the metal thin plate 63 without using a double cylinder structure in this way. Moreover, you may fix by direct adhesion | attachment etc., without going through the metal thin plate 63. FIG. Furthermore, it is also possible to fix using screws, rivets, nails or the like other than staples.

筒状支持体９の内部には、溶融金属採取室６の熱が底部６０ｂから測温センサ１１側に伝わることを遮断するセラミック製のフィルタ９２（綿状の部材）が設置されており、これにより測温センサ１１のリード線に伝熱してその測定を乱すことが防止される。   Inside the cylindrical support 9, a ceramic filter 92 (cotton-like member) is installed to block the heat of the molten metal collection chamber 6 from being transmitted from the bottom 60b to the temperature sensor 11 side. This prevents heat from being transferred to the lead wire of the temperature sensor 11 and disturbing the measurement.

中軸管４は、測温センサ１１及びカーボンセンサ５から導出されるリード線を接続したコネクタ４０が内部に設けられており、サブスリーブ３の図示しない電気接点と接続して各センサからの信号を外部に伝送するように構成されている。   The central tube 4 is provided with a connector 40 to which lead wires led out from the temperature sensor 11 and the carbon sensor 5 are connected, and is connected to an electrical contact (not shown) of the sub-sleeve 3 to receive a signal from each sensor. It is configured to transmit to the outside.

以上、本発明の一実施形態について説明したが、本発明はこうした実施形態に何ら限定されるものではなく、例えば測温センサがないものや他のセンサを併設したものなど、本発明の要旨を逸脱しない範囲において種々なる形態で実施し得ることは勿論である。   As mentioned above, although one embodiment of the present invention has been described, the present invention is not limited to such an embodiment. For example, the gist of the present invention, such as a device without a temperature sensor or another sensor, is provided. Of course, various forms can be implemented without departing from the scope.

図１に示した溶融金属試料採取プローブのサンプル（実施例１）、該プローブの薄型採取容器及び金属製外装体の代わりに、従来からの厚肉の採取容器を装着したサンプル（比較例１）を作製し、これらサンプル（実施例１、比較例１）を用いて同一条件下で転炉内の溶鋼温度および凝固温度を測定した。なお、カーボンセンサの温接点位置は、実施例１が採取室底面より３１．５ｍｍの位置、比較例１が採取室底面より３４ｍｍの位置にあり、各位置での採取容器の側壁厚みは、実施例１が２．７７ｍｍ、比較例１が４．９５ｍｍであった。   Sample of a molten metal sample collection probe shown in FIG. 1 (Example 1), a sample equipped with a conventional thick collection container (Comparative Example 1) instead of a thin collection container and a metal outer casing of the probe And the molten steel temperature and solidification temperature in the converter were measured under the same conditions using these samples (Example 1, Comparative Example 1). The position of the hot contact point of the carbon sensor is 31.5 mm from the bottom of the sampling chamber in Example 1 and 34 mm from the bottom of the sampling chamber in Comparative Example 1. The side wall thickness of the sampling container at each position is Example 1 was 2.77 mm, and Comparative Example 1 was 4.95 mm.

測定結果の一例を図５のグラフに示す。図中（ａ）のグラフは実施例１、図中（ｂ）のグラフは比較例１のサンプルによる測定結果を示し、横軸は経過時間（秒；sec）を示している。図５の測定結果より、実施例１では比較例１に比べて溶鋼温度が高くないのに、凝固温度波形の波形平衡部ｓがより高温域で現われ、且つ２倍程度の長く安定したものとなり、測定精度を著しく向上できることが分かる。   An example of the measurement result is shown in the graph of FIG. The graph of (a) in the figure shows the measurement result of the sample of Example 1, and the graph of (b) in the figure shows the measurement result by the sample of Comparative Example 1, and the horizontal axis shows the elapsed time (seconds; sec). From the measurement results of FIG. 5, the molten steel temperature in Example 1 is not higher than that in Comparative Example 1, but the waveform equilibrium portion s of the solidification temperature waveform appears in a higher temperature range and is stable about twice as long. It can be seen that the measurement accuracy can be remarkably improved.

本発明の代表的実施形態に係る溶融金属試料採取プローブの概略構成を示す要部断面図。The principal part sectional view showing the schematic structure of the molten metal sampling probe concerning the typical embodiment of the present invention. 同じく溶融金属試料採取プローブの溶融金属採取室を構成する各部材を示す断面図。Sectional drawing which similarly shows each member which comprises the molten metal sampling chamber of a molten metal sampling probe. 薄型採取容器、金属製外装体及び筒状支持体の分解斜視図。The disassembled perspective view of a thin collection container, a metal exterior body, and a cylindrical support body. （ａ）〜（ｃ）は金属製外装体の変形例を示す斜視図。(A)-(c) is a perspective view which shows the modification of a metal exterior body. 転炉内の溶鋼温度および凝固温度を測定した結果のグラフであり、（ａ）は実施例１、（ｂ）は比較例１のグラフ。It is a graph of the result of having measured the molten steel temperature and solidification temperature in a converter, (a) is Example 1 and (b) is a graph of the comparative example 1. FIG.

符号の説明Explanation of symbols

１ 溶融金属試料採取プローブ ２ 筒状本体部
３ サブスリーブ ４ 中軸管
５ カーボンセンサ ６ 溶融金属採取室
７ 脱酸室 ８ 熱電対
９ 筒状支持体 ９ａ 外側面
９ｃ フランジ部分 １０ セラミックヘッド
１１ 測温センサ １２ 紙キャップ
１３ カバー部材 ２０ 紙製外管
２１ 流入口 ４０ コネクタ
６０ 薄型採取容器 ６０ｂ 底部
６１ 金属製外装体 ６１ａ 外側面
６１ｄ スリット ６１Ａ，６１Ｂ 分割部材
６２ 紙製シート体 ６３ 金属製薄板
６４ ステープル ６５ シール材
７０ キル材 ８０ サポータ
８１ 測温部 ９０ 内側支持体
９１ 外側支持体 ９２ フィルタ DESCRIPTION OF SYMBOLS 1 Molten metal sample collection probe 2 Cylindrical main-body part 3 Sub sleeve 4 Medium-axis tube 5 Carbon sensor 6 Molten metal collection chamber 7 Deoxidation chamber 8 Thermocouple 9 Cylindrical support body 9a Outer side surface 9c Flange part 10 Ceramic head 11 Temperature sensor 12 Paper Cap 13 Cover Member 20 Paper Outer Tube 21 Inlet 40 Connector 60 Thin Sampling Container 60b Bottom 61 Metal Exterior Body 61a Outer Side 61d Slit 61A, 61B Split Member 62 Paper Sheet 63 Metal Sheet 64 Staple 65 Seal Material 70 Kill material 80 Supporter 81 Temperature measuring part 90 Inner support 91 Outer support 92 Filter

Claims (6)

試料流入口を備える筒状本体部内に、金属製の溶融金属採取室を設けるとともに、先端測温部が前記溶融金属採取室内に位置され、該溶融金属採取室内に前記試料流入口を通じて流入する溶融金属試料の凝固温度を測定するための熱電対を設けた溶融金属試料採取プローブにおいて、前記溶融金属採取室を、内側の金属製薄型採取容器と、該採取容器に隙間を介して外装される金属製外装体とより構成し、前記金属製外装体を、該薄型採取容器の外径寸法よりも大きな内径寸法を有する両端開放の筒状部材としたことを特徴とする溶融金属試料採取プローブ。 A molten metal sampling chamber made of metal is provided in a cylindrical main body having a sample inlet, and a tip temperature measuring unit is positioned in the molten metal sampling chamber, and the molten metal flows into the molten metal sampling chamber through the sample inlet. In a molten metal sample collection probe provided with a thermocouple for measuring a solidification temperature of a metal sample, the molten metal collection chamber is provided with an inner metal thin collection container and a metal sheathed on the collection container through a gap A molten metal sample-collecting probe comprising: a metal-made exterior body, wherein the metal exterior body is a cylindrical member having both ends open and having an inner diameter larger than the outer diameter of the thin collection container . 前記金属製薄型採取容器を、底部から高さ方向に沿って次第に薄肉に形成し、前記熱電対の測温部が位置する高さでの肉厚を２．０〜４．０ｍｍに設定してなる請求項１記載の溶融金属試料採取プローブ。   The metal thin sampling container is formed to be gradually thinner from the bottom along the height direction, and the thickness at the height at which the temperature measuring part of the thermocouple is located is set to 2.0 to 4.0 mm. The molten metal sampling probe according to claim 1. 前記薄型採取容器と金属製外装体との間に、全周にわたって紙製シート体を介装してなる請求項１又は２記載の溶融金属試料採取プローブ。   The molten metal sample collection probe according to claim 1 or 2, wherein a paper sheet body is interposed between the thin collection container and the metal exterior body over the entire circumference. 前記薄型採取容器の底部に、外側面が前記金属製外装体の外側面と略面一となる紙製の筒状支持体を取り付け、該筒状支持体の前記薄型採取容器底部より外方に突出しているフランジ部分で前記薄型採取容器に装着した金属製外装体を係止してなる請求項１〜３の何れか１項に記載の溶融金属試料採取プローブ。 At the bottom of the thin collection container, a paper cylindrical support whose outer surface is substantially flush with the outer surface of the metal exterior body is attached, and outward from the bottom of the thin collection container of the cylindrical support The molten metal sample collection probe according to any one of claims 1 to 3 , wherein a metal outer body mounted on the thin collection container is locked by a protruding flange portion. 前記薄型採取容器の外側面より底部側に延びる金属製薄板を単又は複数設け、該金属製薄板に対して前記筒状支持体を固定してなる請求項４記載の溶融金属試料採取プローブ。 The molten metal sample collection probe according to claim 4 , wherein one or a plurality of metal thin plates extending from the outer surface of the thin collection container to the bottom side are provided, and the cylindrical support is fixed to the metal thin plate. 前記筒状支持体を、外側面が前記薄型採取容器の外側面と略面一となる筒状の内側支持体と、該内側支持体に外装され、外側面が前記金属製外装体の外側面と略面一となる外側支持体とより二重筒構造に構成し、前記金属製薄板をこれら内側支持体と外側支持体の間に挟み込んで固定してなる請求項５記載の溶融金属試料採取プローブ。
The cylindrical support is covered with the cylindrical inner support whose outer surface is substantially flush with the outer surface of the thin collection container, and the outer surface is the outer surface of the metal outer package. The molten metal sample collection according to claim 5 , wherein the outer support is substantially flush with a double cylinder structure, and the thin metal plate is sandwiched and fixed between the inner support and the outer support. probe.
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