JP2010122232A - Heating furnace and thermometer - Google Patents

Heating furnace and thermometer Download PDF

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JP2010122232A
JP2010122232A JP2010003230A JP2010003230A JP2010122232A JP 2010122232 A JP2010122232 A JP 2010122232A JP 2010003230 A JP2010003230 A JP 2010003230A JP 2010003230 A JP2010003230 A JP 2010003230A JP 2010122232 A JP2010122232 A JP 2010122232A
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furnace
thermocouple
thermometer
tube
temperature
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JP5051245B2 (en
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Hiroshi Kubota
央 久保田
Yusuke Hiraishi
裕介 平石
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Sumitomo Metal Ind Ltd
住友金属工業株式会社
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<P>PROBLEM TO BE SOLVED: To measure a temperature at as near to a billet as possible in a furnace. <P>SOLUTION: The heating furnace includes: a protective tube 16 and an insulating tube 12a for an upper combustion-controlling thermocouple-type thermometer 11 set at the ceiling inside the furnace; and a terminal board 13 to fix the insulating tube 12a. The protective tube 16 is fixed to a ceiling wall 14 inside the furnace. The terminal board 13 is attached to the protective tube 16 movably in horizontal and vertical directions so that ambient temperature near the surface of material conveyed in the furnace is measurable. Thereby, ambient temperature near the back surface of a billet conveyed in the furnace is measurable. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、炉内材料の偏熱を抑制可能な加熱炉、及び、この加熱炉に設置される炉内温度制御用の温度計に関するものである。   The present invention relates to a heating furnace capable of suppressing uneven heat of in-furnace material, and a thermometer for controlling the temperature in the furnace installed in the heating furnace.
例えば、図4に示すウォーキングビーム式加熱炉31では、装入側から予熱帯32、加熱帯33、均熱帯34となされ、これら各帯32〜34で所定の温度に加熱された例えばビレット等の炉内材料(以下、「ビレット35」と言う。)は順次出側から抽出される。従って、これら各帯32〜34における炉内温度制御は、ビレット温度の偏熱を抑制するために極めて重要である。特に抽出直前の均熱帯34の炉内温度制御は需要である。そして、この炉内温度の制御に際し、炉内温度を測定する温度計は、最も重要なセンサーである。   For example, in the walking beam type heating furnace 31 shown in FIG. 4, a pre-tropical zone 32, a heating zone 33, and a soaking zone 34 are formed from the charging side, and each zone 32 to 34 is heated to a predetermined temperature, for example, a billet or the like. In-furnace material (hereinafter referred to as “billette 35”) is sequentially extracted from the outlet side. Therefore, in-furnace temperature control in each of the bands 32 to 34 is extremely important in order to suppress uneven heat of the billet temperature. In particular, temperature control in the soaking zone 34 immediately before extraction is in demand. And in controlling this furnace temperature, the thermometer which measures the furnace temperature is the most important sensor.
このビレットの温度を最適に制御するためには、ビレット近傍の温度を測定し、この測定値に基づいて炉内温度を制御することが望ましいが、炉内温度制御用の温度計(熱電対装置)は、価格・寿命・操作性の面から、一般に、炉壁に設置されている。   In order to optimally control the temperature of the billet, it is desirable to measure the temperature in the vicinity of the billet and control the temperature in the furnace based on the measured value. However, a thermometer (thermocouple device) for controlling the temperature in the furnace ) Is generally installed on the furnace wall in terms of price, life and operability.
例えば上部燃焼制御用の温度計36aは、図4(a)に示したように、天井壁に設置され、下部燃焼制御用の温度計36bは、図4(b)に示したように、側壁に取り付けられることが多い。なお、下部燃焼制御用の温度計を炉床に取り付けずに、側壁に取付けるのは、故障時に容易に取り替えられる場所に設置する必要があるためである。この下部燃焼制御用の温度計は、炉壁に設けられているため、実際の抽出帯におけるビレット下部周辺の温度とは、かなり異なる傾向がある。これは、抽出扉、排出ローラ、下部バーナ、スケールピット等が直近にあり、外乱の影響を受け易いためである。   For example, the upper combustion control thermometer 36a is installed on the ceiling wall as shown in FIG. 4A, and the lower combustion control thermometer 36b is installed on the side wall as shown in FIG. 4B. It is often attached to. The reason why the thermometer for lower combustion control is attached to the side wall without being attached to the hearth is that it is necessary to install it in a place where it can be easily replaced in the event of a failure. Since the thermometer for controlling the lower combustion is provided on the furnace wall, it tends to be considerably different from the temperature around the lower portion of the billet in the actual extraction zone. This is because the extraction door, the discharge roller, the lower burner, the scale pit, etc. are close to each other and are easily affected by disturbance.
しかしながら、同じ炉壁であっても、天井壁と側壁と炉床では、かなり温度が異なる。通常は、熱損失が少なく、バーナフレームに近い炉床が最も温度が高く、続いて天井壁、側壁の順になる。特にウォーキングビーム式加熱炉のように、広くて大きな炉においては、実際に制御に使用している温度計周辺の雰囲気温度と、ビレット周辺の温度とは、かなり異なる場合が多い。これは、先に述べた外乱の影響とバーナの焚き量によってフレーム長さ、つまり火炎のピーク温度点が変わる事が主な原因である。   However, even with the same furnace wall, the temperature is considerably different between the ceiling wall, the side wall, and the hearth. Usually, the heat loss is low, and the hearth near the burner frame has the highest temperature, followed by the ceiling wall and side walls. In particular, in a large and large furnace such as a walking beam heating furnace, the ambient temperature around the thermometer actually used for control and the temperature around the billet are often quite different. This is mainly because the frame length, that is, the peak temperature point of the flame changes depending on the influence of the disturbance described above and the amount of burning of the burner.
また、ウォーキングビーム式連続加熱炉では、搬送ビームや固定ビームを冷却する冷却水によって、ビーム周辺(ビレット近傍)の雰囲気温度が天井壁や側壁の部分に比べてかなり低く、また、抽出ローラ付近は極端に温度が低くなっていることが、本発明者の調査によって判明した。   In the walking beam type continuous heating furnace, the ambient temperature around the beam (near the billet) is considerably lower than the ceiling and side walls due to the cooling water that cools the carrier beam and fixed beam. The inventors found that the temperature was extremely low.
よって、ビレット温度をより正確に知るためには、炉内温度制御用の温度計は、可及的にビレットの近傍に設置することが望ましいが、ウォーキングビーム式加熱炉では、炉内温度が1200〜1300℃と高いこと、また、天井壁や側壁から挿入した温度計でビレット近傍の炉内温度を測定するには、2mもの長尺の温度計を必要とする等から、温度計の構造や環境的にきわめて困難であり、天井壁や側壁から100mm程度炉内側の位置の雰囲気温度を測定しているのが実情である。   Therefore, in order to know the billet temperature more accurately, it is desirable to install the thermometer for controlling the furnace temperature in the vicinity of the billet as much as possible. However, in the walking beam heating furnace, the furnace temperature is 1200. In order to measure the temperature in the furnace near the billet with a thermometer inserted from the ceiling wall or side wall, a thermometer as long as 2 m is required. It is extremely difficult environmentally, and the actual situation is that the ambient temperature at the position inside the furnace is measured about 100 mm from the ceiling and side walls.
従って、図4に示したような位置に設置した従来の温度計による測定値を使用した炉内温度制御では、抽出が停滞した時等、状況が変化した場合、ビレットの上下方向で温度差がつき易く、圧延時における偏肉不良の原因となる。   Therefore, in the in-furnace temperature control using the measured value by the conventional thermometer installed at the position as shown in FIG. 4, when the situation changes, such as when the extraction is stagnant, the temperature difference in the vertical direction of the billet It is easy to stick and causes uneven thickness failure during rolling.
ところで、温度計(熱電対装置)は、図5に示したように、熱接点37と、この熱接点37に接続される、例えば白金38aと白金ロジウム38bの2本の熱電対素線38を絶縁保持する絶縁管39を備えた熱電対素子40を、保護管41の内部に収納した構成である(特許文献1)。なお、前記絶縁管39は軸方向に分割された構成である。   Incidentally, as shown in FIG. 5, the thermometer (thermocouple device) includes a thermal contact 37 and two thermocouple strands 38, for example, platinum 38a and platinum rhodium 38b connected to the thermal contact 37. This is a configuration in which a thermocouple element 40 including an insulating tube 39 for insulating and holding is housed inside a protective tube 41 (Patent Document 1). The insulating tube 39 is divided in the axial direction.
このような構成の温度計の不良は、保護管の不良と、熱電対素線の不良に分けることができる。このうち、保護管の不良は、炉内温度が昇降することによる機械的熱歪やバーナフレームや炉内雰囲気ガスによる劣化が主な原因である。一方、熱電対素線の不良は、その構成上絶縁管を保持しなければならないことから起こる自重による断線や、炉内温度が昇降することによる熱膨張収縮による断線、炉内雰囲気ガスによる材質変化による誤差等が主な原因である。   The failure of the thermometer having such a configuration can be divided into a failure of a protective tube and a failure of a thermocouple element. Among these, the failure of the protective tube is mainly due to mechanical thermal distortion due to the rise and fall of the furnace temperature and deterioration due to the burner frame and the atmosphere gas in the furnace. On the other hand, defective thermocouple wires are broken due to their own weight due to the fact that the insulation tube must be held due to their configuration, broken due to thermal expansion and contraction due to the rise and fall of the furnace temperature, and material change due to furnace atmosphere gas This is mainly due to errors caused by
また、熱電対素線そのものも、本発明者による調査の結果、熱応力により膨張・収縮を繰り返す毎に白金・白金ロジウムの白金側が白金ロジウム側に比べて伸びが激しく、捩じれて破断し易くなることが判明した。   In addition, as a result of the investigation by the present inventors, the thermocouple element itself is more likely to be twisted and broken easily because the platinum side of platinum / rhodium rhodium is stretched more intensely than the platinum rhodium side each time the expansion / contraction is repeated due to thermal stress. It has been found.
これは、白金が白金ロジウムに比べて柔らかくて重たいので、伸び易く引っ張り強さが弱いために切れ易いからである。また、図5(b)に示したように、絶縁管39の出口がW型となっていたり、図6に示したように、絶縁管39の出口がフラットの従来の温度計では、この絶縁管39の出口の角の部分で、前記膨張・収縮を繰り返す際に擦れることによっても断線が発生する。   This is because platinum is softer and heavier than platinum rhodium, and is easy to stretch because it is easy to stretch and has low tensile strength. In addition, as shown in FIG. 5B, the insulation tube 39 has a W-shaped outlet, or as shown in FIG. Disconnection is also caused by rubbing at the corner of the outlet of the tube 39 when the expansion / contraction is repeated.
実開平5−23079号公報Japanese Utility Model Publication No. 5-23079
本発明が解決しようとする問題点は、ビレット近傍の炉内温度を長時間安定して測定することができないという点、及び、多少バーナフレームの影響を受けても、熱応力等に耐えることができる温度計がないという点である。   The problems to be solved by the present invention are that the furnace temperature in the vicinity of the billet cannot be measured stably for a long time, and it can withstand thermal stress etc. even if it is somewhat affected by the burner frame. There is no thermometer that can be used.
本発明は上記の知見等に基づいてなされたもので、
本発明の加熱炉は、
可及的に炉内に位置するビレット近傍の温度測定を可能とするために、
炉内の天井に設置する上部燃焼制御用熱電対式温度計のための保護管と絶縁管、及び該絶縁管を固定するための端子板を有し、
前記保護管は、前記炉内の天井壁に固定され、
前記端子板は、水平方向及び上下方向の移動が自在なように前記保護管に取付けられたことを最も主要な特徴としている。
The present invention has been made on the basis of the above findings, etc.
The heating furnace of the present invention is
To enable temperature measurement near the billet located in the furnace as much as possible,
A protective tube and an insulating tube for an upper combustion control thermocouple thermometer installed on the ceiling in the furnace, and a terminal plate for fixing the insulating tube;
The protective tube is fixed to a ceiling wall in the furnace,
The terminal board is most characterized by being attached to the protective tube so as to be movable in the horizontal and vertical directions.
この本発明の加熱炉において、少なくとも炉に設置する温度計を前記の構成とするのは、炉内でビレットが所定の温度になっていないと、その後の圧延で偏肉が発生することと、先に説明したように、炉内の特に抽出ローラ付近は温度が低くなっており、より正確にビレット近傍の雰囲気温度を測定する必要があるからである。   In the heating furnace of the present invention, at least the thermometer installed in the furnace has the above-described configuration.If the billet is not at a predetermined temperature in the furnace, uneven thickness occurs in subsequent rolling, As described above, the temperature in the furnace is particularly low near the extraction roller, and it is necessary to measure the ambient temperature near the billet more accurately.
また、前記本発明の加熱炉に設置する本発明の上部燃焼制御用熱電対式温度計は、
バーナフレーム等による影響を排除して寿命延長を可能とするために、
前記保護管と前記絶縁管と前記熱電対式温度計を構成する熱電対素子を有し、
前記絶縁管は、前記保護管に対して、水平方向及び上下方向の移動が自在なように取り付けられ、
前記熱電対素子は、前記絶縁管内に絶縁保持されたことを最も主要な特徴としている。
Further, the thermocouple thermometer for upper combustion control of the present invention installed in the heating furnace of the present invention,
In order to eliminate the influence of the burner frame etc. and to extend the life,
A thermocouple element constituting the protective tube, the insulating tube, and the thermocouple thermometer;
The insulating tube is attached to the protective tube so as to be movable in the horizontal and vertical directions,
The most important feature of the thermocouple element is that it is insulated and held in the insulating tube.
前記本発明の加熱炉に設置する上部燃焼制御用熱電対式温度計においては、
2本の熱電対素線と前記絶縁管を有し、
前記絶縁管は、その先端を楔状に形成して、この楔状面に前記2本の熱電対素線の出口を設け、
前記熱電対素線は白金ロジウムと白金の2つの部分で構成され、
前記白金ロジウム部分は前記白金部分よりも長く、前記2本の熱電対素線の接点位置を前記白金側寄りに位置させることが、絶縁管の出口での接触に起因する熱電対素線の断線を防止する点からは望ましい。また、前記上部燃焼制御用熱電対式温度計の前記保護管は再結晶アルミナ製であることが、長寿命化の点で望ましい。
In the upper combustion control thermocouple thermometer installed in the heating furnace of the present invention,
Having two thermocouple wires and the insulating tube,
The insulating tube has a wedge-shaped tip, and an outlet of the two thermocouple wires is provided on the wedge-shaped surface,
The thermocouple wire is composed of two parts, platinum rhodium and platinum,
The platinum rhodium part is longer than the platinum part, and the contact position of the two thermocouple wires is located closer to the platinum side, the disconnection of the thermocouple wire due to the contact at the outlet of the insulating tube It is desirable from the point of preventing. In addition, it is desirable that the protective tube of the upper combustion control thermocouple thermometer is made of recrystallized alumina from the viewpoint of extending the life.
本発明では、温度計の長寿命化を図りつつ、可及的にビレット近傍の炉内温度を測定することができるので、偏熱発生を抑制することができるという利点がある。   In the present invention, since the temperature in the furnace near the billet can be measured as much as possible while extending the life of the thermometer, there is an advantage that the occurrence of uneven heat can be suppressed.
本発明の加熱炉における上部燃焼制御用熱電対式温度計の説明図で、均熱帯の天井炉壁に設置した場合を説明する図で、(a)は炉幅方向の両側に設置するもの、(b)は炉幅方向の中央に設置するものである。It is an explanatory view of the thermocouple thermometer for upper combustion control in the heating furnace of the present invention, and is a view for explaining the case where it is installed on a soaking ceiling wall, (a) is installed on both sides in the furnace width direction, (B) is installed at the center in the furnace width direction. 本発明の加熱炉における上部燃焼制御用熱電対式温度計の詳細を断面して示した図であり、(a)は正面から見た図、(b)は保護管と絶縁管、熱電対素線を側面から見た図である。It is the figure which showed the detail of the thermocouple type thermometer for upper combustion control in the heating furnace of this invention in cross section, (a) is the figure seen from the front, (b) is a protection tube, an insulation tube, and a thermocouple element It is the figure which looked at the line from the side. 本発明の熱電対式温度計における絶縁管の出口における形状及び熱接点の説明図で、(a)は常温時(使用前)、(b)は高温時(使用後)、(c)は(a)図を側面から見た図である。It is explanatory drawing of the shape and heat | fever contact in the exit of the insulation pipe | tube in the thermocouple thermometer of this invention, (a) is normal temperature (before use), (b) is high temperature (after use), (c) is ( a) It is the figure which looked at the figure from the side. ウォーキングビーム式加熱炉における炉内温度制御用温度計の設置位置を説明する図である。It is a figure explaining the installation position of the thermometer for furnace temperature control in a walking beam type heating furnace. 従来の温度計の一例を説明する図で、(a)は全体図、(b)は熱電対素子の説明図を示す。It is a figure explaining an example of the conventional thermometer, (a) is a general view, (b) shows explanatory drawing of a thermocouple element. 従来の温度計の他の例を説明する熱電対素子の図である。It is a figure of the thermocouple element explaining the other example of the conventional thermometer.
本発明では、温度計の長寿命化を図りつつ、可及的にビレット近傍の炉内温度を測定するという目的を、絶縁管を固定するための端子板を水平方向及び上下方向の移動自在に、炉内の天井壁に固定した上部燃焼制御用熱電対式温度計の保護管に取付けることで実現した。   In the present invention, the purpose of measuring the temperature in the furnace near the billet as much as possible while extending the life of the thermometer is to allow the terminal plate for fixing the insulating tube to be moved in the horizontal and vertical directions. This was realized by attaching to the protection tube of the thermocouple thermometer for upper combustion control fixed to the ceiling wall in the furnace.
以下、本発明を実施するための最良の形態について、図1〜図3を用いて説明する。   Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.
図1はウォーキングビーム式加熱炉に適用した場合の本発明の加熱炉における上部燃焼制御用熱電対式温度計の説明図で、均熱帯の天井壁に設置した場合を説明する図、図2は上部燃焼制御用熱電対式温度計の詳細を断面して示した図である。   FIG. 1 is an explanatory diagram of a thermocouple thermometer for upper combustion control in a heating furnace of the present invention when applied to a walking beam type heating furnace. FIG. It is the figure which carried out the cross section and showed the detail of the thermocouple thermometer for upper combustion control.
11は上部燃焼制御用熱電対式温度計であり、図2に示すように、熱電対素子12を構成する絶縁管12aをその軸方向に分割せず一体的に形成し、この一体的に形成した絶縁管12aを、その上端部で端子板13に固定している。このようにすることで、絶縁管12aを熱電対素線12bによって保持することが無くなり、自重による熱電対素線12bの断線を防止できると共に、炉内雰囲気ガスの侵入も防止できる。   Reference numeral 11 denotes an upper combustion control thermocouple thermometer. As shown in FIG. 2, the insulating tube 12a constituting the thermocouple element 12 is integrally formed without being divided in the axial direction, and is integrally formed. The insulated tube 12a is fixed to the terminal plate 13 at its upper end. By doing so, the insulating tube 12a is not held by the thermocouple element 12b, and disconnection of the thermocouple element 12b due to its own weight can be prevented and intrusion of furnace atmosphere gas can also be prevented.
そして、前記端子板13を、前記天井壁14に例えばフランジ15によって固定する再結晶アルミナ製の保護管16に対して、水平方向及び上下方向の移動が自在なように取付けている。保護管16に対して端子板13を水平方向及び上下方向の移動が自在なように取付ける手段は、特に限定されないが、図2に示した例では次のような構成のものを示している。   The terminal board 13 is attached to a recrystallized alumina protective tube 16 fixed to the ceiling wall 14 by, for example, a flange 15 so as to be movable in the horizontal direction and the vertical direction. The means for attaching the terminal plate 13 to the protective tube 16 so as to be movable in the horizontal direction and the vertical direction is not particularly limited, but the example shown in FIG. 2 has the following configuration.
すなわち、保護管16を外側保護管16aと内側保護管16bの2重に構成し、このうちの外側保護管16aの外側に更に耐熱セメント17によって接着した例えばステンレス製のケース18内に保持板19を固定する。なお、ステンレスの部分は、耐熱温度の関係より、炉内に入らないような長さにする。   That is, the protective tube 16 is constituted by a double of an outer protective tube 16a and an inner protective tube 16b, and the holding plate 19 is placed in a case 18 made of stainless steel, for example, which is further bonded to the outside of the outer protective tube 16a by a heat-resistant cement 17. To fix. In addition, the length of the stainless steel portion is set so as not to enter the furnace because of the heat resistant temperature.
前記保持板19に突出状に取り付けたねじ軸20より大径の孔21aを有する座21を、前記ねじ軸20を貫通して前記保持板19の上に載せ、この座21の軸心に設けた軸孔21bに前記端子板13嵌め込む。このようにすることで、保護管16に対して端子板13が水平方向及び上下方向に自在に移動することができる。   A seat 21 having a hole 21 a having a diameter larger than that of the screw shaft 20 attached to the holding plate 19 so as to protrude is placed on the holding plate 19 through the screw shaft 20, and provided on the shaft center of the seat 21. The terminal plate 13 is fitted into the shaft hole 21b. By doing in this way, the terminal board 13 can move freely with respect to the protective tube 16 in a horizontal direction and an up-down direction.
図3は本発明の熱電対式温度計における絶縁管の先端部における形状及び熱接点の説明図である。
前記の上部燃焼制御用熱電対式温度計11では、その熱電対素子12を構成する絶縁管12aの先端を図3(c)に示したように楔状に形成して、この楔状面12aaに2本の熱電対素線12bの出口を設けると共に、図3(a)に示したように、常温時には、2本の熱電対素線12bのうち、熱膨張率の小さい白金ロジウム12bbを、熱膨張率の大きい白金12baよりも予め長くなして、熱接点22の位置を白金12ba側寄りに位置させておくことが望ましい。
FIG. 3 is an explanatory diagram of the shape and the hot junction at the tip of the insulating tube in the thermocouple thermometer of the present invention.
In the upper combustion control thermocouple thermometer 11, the tip of the insulating tube 12a constituting the thermocouple element 12 is formed in a wedge shape as shown in FIG. As shown in FIG. 3A, the platinum rhodium 12bb having a small coefficient of thermal expansion of the two thermocouple wires 12b is thermally expanded at room temperature as shown in FIG. It is desirable that the position of the thermal contact 22 is positioned closer to the platinum 12ba side than the platinum 12ba having a high rate in advance.
このような構成とすれば、2本の熱電対素線12bの膨張・収縮時に、絶縁管12aの出口の角での接触が効果的に防止でき、熱電対素線12bの断線を防ぐことができる。   With such a configuration, when the two thermocouple wires 12b expand and contract, contact at the corner of the outlet of the insulating tube 12a can be effectively prevented, and disconnection of the thermocouple wires 12b can be prevented. it can.
前記の上部燃焼制御用熱電対式温度計11を均熱帯に設置した例えばウォーキングビーム式加熱炉では、ビレット近傍の炉内雰囲気温度を測定し、炉内温度の制御が最適に行えることになって、偏熱の発生が抑制できる。   For example, in a walking beam heating furnace in which the upper combustion control thermocouple thermometer 11 is installed in the soaking zone, the furnace atmosphere temperature near the billet is measured, and the furnace temperature can be optimally controlled. The occurrence of uneven heat can be suppressed.
上記の例は単なる一例であり、本発明は上記の例に限らず、各請求項に記載された技術的思想の範囲内で、適宜実施の形態を変更しても良いことは言うまでもない。   The above example is merely an example, and the present invention is not limited to the above example, and it goes without saying that the embodiment may be appropriately changed within the scope of the technical idea described in each claim.
以上の本発明は、加熱炉に限らず、保熱炉やあらゆる炉にも適用できる。また、ウォーキングビーム式炉以外の炉にも適用できる。   The present invention as described above can be applied not only to a heating furnace but also to a heat-retaining furnace or any furnace. It can also be applied to furnaces other than walking beam furnaces.
11 上部燃焼制御用熱電対式温度計
12 熱電対素子
12a 絶縁管
12aa 楔状面
12b 熱電対素線
12ba 白金
12bb 白金ロジウム
13 端子板
14 天井壁
16 保護管
11 Thermocouple Thermometer for Upper Combustion Control 12 Thermocouple Element 12a Insulating Tube 12aa Wedge Surface 12b Thermocouple Wire 12ba Platinum 12bb Platinum Rhodium 13 Terminal Board 14 Ceiling Wall 16 Protective Tube

Claims (4)

  1. 炉内の天井に設置する上部燃焼制御用熱電対式温度計のための保護管と絶縁管、及び該絶縁管を固定するための端子板を有し、
    前記保護管は、前記炉内の天井壁に固定され、
    前記端子板は、水平方向及び上下方向の移動が自在なように前記保護管に取付けられ、炉内を搬送する材料の表面近傍の雰囲気温度を測定可能に構成したことを特徴とする加熱炉。
    A protective tube and an insulating tube for an upper combustion control thermocouple thermometer installed on the ceiling in the furnace, and a terminal plate for fixing the insulating tube;
    The protective tube is fixed to a ceiling wall in the furnace,
    A heating furnace characterized in that the terminal plate is attached to the protective tube so as to be movable in the horizontal direction and the vertical direction, and is capable of measuring the ambient temperature in the vicinity of the surface of the material transported in the furnace.
  2. 前記保護管と前記絶縁管と前記熱電対式温度計を構成する熱電対素子を有し、
    前記絶縁管は、前記保護管に対して、水平方向及び上下方向の移動が自在なように取り付けられ、
    前記熱電対素子は、前記絶縁管内に絶縁保持されたことを特徴とする請求項1に記載の加熱炉に設置する上部燃焼制御用熱電対式温度計。
    A thermocouple element constituting the protective tube, the insulating tube, and the thermocouple thermometer;
    The insulating tube is attached to the protective tube so as to be movable in the horizontal and vertical directions,
    The thermocouple thermometer for upper combustion control installed in a heating furnace according to claim 1, wherein the thermocouple element is insulated and held in the insulating tube.
  3. 2本の熱電対素線と前記絶縁管を有し、
    前記絶縁管は、その先端を楔状に形成して、この楔状面に前記2本の熱電対素線の出口を設け、
    前記熱電対素線は白金ロジウムと白金の2つの部分で構成され、
    前記白金ロジウム部分は前記白金部分よりも長く、前記2本の熱電対素線の接点位置を前記白金側寄りに位置させたことを特徴とする請求項2に記載の加熱炉に設置する上部燃焼制御用熱電対式温度計。
    Having two thermocouple wires and the insulating tube,
    The insulating tube has a wedge-shaped tip, and an outlet of the two thermocouple wires is provided on the wedge-shaped surface,
    The thermocouple wire is composed of two parts, platinum rhodium and platinum,
    3. The upper combustion installed in a heating furnace according to claim 2, wherein the platinum rhodium portion is longer than the platinum portion, and the contact position of the two thermocouple wires is located closer to the platinum side. Thermocouple thermometer for control.
  4. 前記上部燃焼制御用熱電対式温度計の前記保護管は再結晶アルミナ製であることを特徴とする請求項2又は3に記載の加熱炉に設置する上部燃焼制御用熱電対式温度計。   4. The upper combustion control thermocouple thermometer installed in a heating furnace according to claim 2, wherein the protective tube of the upper combustion control thermocouple thermometer is made of recrystallized alumina.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102322971A (en) * 2011-08-16 2012-01-18 西安热工研究院有限公司 Long service life wall temperature measuring device of boiler tube in boiler
CN103439019A (en) * 2013-08-29 2013-12-11 中冶南方(武汉)威仕工业炉有限公司 Online billet temperature collecting system and method
CN108131960A (en) * 2017-12-15 2018-06-08 成都光明光电股份有限公司 Thermometry in combined type temperature measuring rack and heat-treatment furnace

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102322971A (en) * 2011-08-16 2012-01-18 西安热工研究院有限公司 Long service life wall temperature measuring device of boiler tube in boiler
CN103439019A (en) * 2013-08-29 2013-12-11 中冶南方(武汉)威仕工业炉有限公司 Online billet temperature collecting system and method
CN108131960A (en) * 2017-12-15 2018-06-08 成都光明光电股份有限公司 Thermometry in combined type temperature measuring rack and heat-treatment furnace
CN108131960B (en) * 2017-12-15 2020-03-17 成都光明光电股份有限公司 Combined temperature measuring frame and heat treatment furnace temperature measuring method

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