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JP3843036B2 - Lower surface temperature measurement device for metal objects - Google Patents
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JP3843036B2 - Lower surface temperature measurement device for metal objects - Google Patents

Lower surface temperature measurement device for metal objects Download PDF

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Publication number
JP3843036B2
JP3843036B2 JP2002108139A JP2002108139A JP3843036B2 JP 3843036 B2 JP3843036 B2 JP 3843036B2 JP 2002108139 A JP2002108139 A JP 2002108139A JP 2002108139 A JP2002108139 A JP 2002108139A JP 3843036 B2 JP3843036 B2 JP 3843036B2
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opening
shutter
cylinder
air
measured
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JP2003302287A (en
Inventor
貴之 本田
修一 軸丸
繁 小野田
敬司 姫野
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Nippon Steel Corp
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Nippon Steel Corp
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Description

【0001】
【発明の属する技術分野】
本発明は温度測定装置に関し、具体的には圧延工程中における鋼片、鋼板、形鋼などの金属被測定体の下面温度を、下面側から測定する測定装置に関する。
【0002】
【従来の技術】
近年、鋼板や形鋼などに対する強度、靭性など材質の優れたものが求められる一方、これらの形状についても要求が厳しくなっている。このため、圧延中の鋼材の温度に応じて圧下率を制限する制御圧延や、圧延中あるいは圧延後の冷却において冷却速度を制御する制御冷却などにより、鋼材の組織を調整し、材質の向上を図る技術が多く採用されている。また、圧延後の冷却を鋼材の上下面の冷却条件を制御して上下面の温度差を解消して、この温度差に起因する冷却終了後の曲がりや、反り等の形状不良の発生を防止することも多く実施されている。
【0003】
これら鋼材の上下面の温度差に起因する材質の不均一や、形状不良の発生を防止するために、上下面の温度差を精度良く測定し、把握する必要がある。
【0004】
しかしながら、圧延工程においては、鋼板の冷却やスケール除去のための冷却水や、圧延ロールの冷却水が供給されており、圧延工程の周辺には冷却水、スケール等か飛散し、粉塵、水蒸気などが多く浮遊して存在している。
【0005】
また、これに続く冷却工程においても、水滴や水蒸気が極めて多く浮遊している。このような環境の中で鋼板の温度を精度良く測定するために、高温、水分および粉塵から温度測定装置を保護する方策が従来から講じられてきた。
【0006】
特に、鋼板の下面温度を測定する測温装置の場合は、鋼板下面に対して対向してその視野を開く必要があり、鋼板に供給される冷却水の水滴、スケール、粉塵などが直接、温度計やそのレンズに付着し易いため、正確な温度の測定が妨げられることになる。
【0007】
図4は、圧延工程中における形鋼や鋼板などの金属被測定体の温度を下面から測定する状況を示したものである。金属被測定体1(以下の説明においては、鋼板をもって代表させる。)は、ローラー2により支持、搬送される。ローラー2の間に測温装置3がその測定方向を鋼板の下面に対向するようにして設けられ、鋼板の温度を下面側から測定するようにしている。この温度は、鋼板全体を代表温度として、あるいは鋼板下面の温度として、上記の制御に際して活用されている。
【0008】
実公昭60−38201号公報には、図5に示すように、下面温度を測定するに際し、被測定体からの放射をレンズ51で集光し温度測定する温度計本体50と、この温度計本体50上方に固定され、中央に穴58’を有する隔壁58の複数個により複数の部屋に仕切られ、この複数の部屋のそれぞれにドレン穴53を有し、中央に穴57’を有する蓋57が先端に装着された視管56と、この視管内に高圧空気を供給するこの視管の下部に接続されたパージエア供給手段55とからなる放射温度計54が開示されており、上記の複数の隔壁の穴からパージエア流Aが高速に吹き上がるようにして、温度計のレンズに水滴などが落下するのを防止するようにしている。
【0009】
【発明が解決しようとする課題】
上記の放射温度計は、被測定体の下面温度測定時に、視管の穴からのパージエアーを吹き出すことにより、水滴、スケールなどが温度計に落下、付着するのを防止するものであるが、上述のように、鋼板の温度を測定する周辺環境には粉塵や水蒸気が浮遊しており、被測定体の温度を測定する時以外でも、常時、大量のパージエアを流しておかなければ、粉塵や水滴が温度測定装置に付着する恐れがあり、また、常時大量のパージエアを流しつづけることは省エネルギーの観点からも好ましくない。さらに、測定待機中にも高温の鋼板からの輻射熱に曝されることになり温度計本体にとって好ましくない。
【0010】
【課題を解決するための手段】
本発明は、上記の課題を解決するためになされたものであり、その要旨とするところは以下の通りである。
【0011】
金属被測定体の下方に温度計本体を収容した函体を設け、前記函体に前記温度計本体により前記金属被測定体下面の温度を測定するための開口部を設け、該開口部の金属被測定体下面に対向する側に筒体を連通接続し、前記函体及び筒体に空気供給口を有する金属被測定体の下面温度測定装置であって、
該筒体の空気供給口からの空気の供給により開放し、該空気の供給の停止により閉鎖する上部シャッターを、前記筒体の金属被測定体の下面に対向する開口部に設けると共に、前記函体の開口部を開閉するための下部シャッターを設けたことを特徴とする金属被測定体の下面温度測定装置。
【0012】
【発明の実施の形態】
本発明の温度測定装置を、本発明の実施例の図面を参照しながら説明する。
【0013】
図1は、本発明の温度測定装置の一実施例の装置の正面概略図であり、図2は、本発明の温度測定装置の一実施例の装置の側面概略図である。
【0014】
図1、図2において、本発明の温度測定装置は、温度計本体4と、この温度計本体4を収納し、かつその上方に開口部15を有すると共に空気供給口18を有する函体5と、この函体の上部に設けられ、空気供給口19と上部開口部17設けた上部シャッター10とを有する筒体6と、函体5と筒体6の間に設けられた下部シャッター7とから基本的に構成されている。
【0015】
函体5の上部には、開口部15を設けた蓋板8が設けられ、筒体6の下部には下部開口部16を設けた底板9が設けられている。なお、蓋体8は函体5と、底板9は筒体6と一体に構成する構造としても良い。この底板9と蓋板8との間にシャッター7が進退可能に設けられている。シャッターは、蓋板及び底板の開口部15,16を進退により閉鎖し、また開放するに十分な幅と長さを有しており、その一端は、これを進退させる開閉装置26と連結されている。例えば図1のように、底板9の下面は、シャッターの一端側から他端側、すなわちシャッターの他端が開口15,16を進出方向において閉鎖するに十分な位置、までの長さにわたり、かつシャッターの幅、厚さに対して若干の余裕を持った厚さ、幅、厚さで切欠かれており、これによって形成された底板9と蓋板8との空隙をシャッター7が進退する。図1では、底板9の下面を切り欠いたが、蓋板の上面、或いは底板の下面と蓋板の上面双方に切り欠きを設けてシャッターが進退する空隙設けても良いが、シャッターが進退可能となればよく、これらに限定されない。
【0016】
開閉装置26は、油圧、空気圧などのシリンダー、或いはモーター、電磁シリンダーなど各種の駆動装置を使用することができる。また、シャッター7には、近接スイッチ27を設けてシャッターの進退量を制御することが好ましい。
【0017】
函体5には、温度計本体4が、支持体14により函体5に固定されている。
【0018】
温度計本体4は、光ファイバー温度計、放射温度計など、非接触型の温度計であれば良く、これに限定されない。また函体5には、函体内の雰囲気を一定に維持するための空気供給口18が設けられている。温度計本体には、温度計への測定を指示し、測定結果を送信する測定ケーブル24、温度計のレンズ部等を保護するための計装用エアの供給管23が取り付けられている。また、函体の底部には水抜口25が設けられている。
【0019】
この函体5の上部には、筒体6が取り付けられている。筒体6は、下部筒体6bとその上方に取り付けられた上部筒体6aとから構成されている。
【0020】
下部筒体6bの下端には、上述のように下部開口部16を有する底板9が設けられており、シャッターの進退を支持する部材を構成している。また、下部筒体6bには、後述する上部シャッター開閉用の空気供給口19が設けられている。この空気供給口19から供給される空気は、シャッターの開閉動作のためであるので、シャッターの近傍に設けても良いが、筒体の内部への粉塵、水滴等の侵入を防止する観点からは、空気供給口は筒体の下部に設けることが好ましい。また、粉塵や水滴等が上部開口部17から進入するのを効率よく抑制するために、空気供給口19の筒体内の先端には、図1に示したようにL字状の空気吐出管20をその開口部を上向きに配置して設け、空気が上方へ吹き出すようにすることが好ましい。さらに好ましくは、空気供給口19の筒体内の先端に図3に示すように、内側上方に向けた吐出口21を設けた円環状の空気吐出管22を配置する。これによってより効果的に上昇流を形成することができる。
【0021】
この実施例では筒体6は、上部筒体6a、下部筒体6bにより構成されているが、一体としたものでもよい。
【0022】
上部筒体6aの上端の上部開口部17にはこの開口部を開閉する上部シャッター10が設けられている。上部シャッター10はその一端を、筒体6aの上端部近傍でその外周を環状に囲むように設けられた環状の支持部材11の一端で、支持軸12により軸支され、この支持軸12を中心として回転可能である。
【0023】
また、このシャッターの回転の範囲を水平位置から90度未満の範囲に制限するためのストッパー13が、環状の支持部材11の軸12の斜め下方の位置に設けられている。これによって、上部シャッター10は、筒体6の上部開口部17を自重により閉鎖できる。
【0024】
なお、筒体6の端部の上部開口部17、蓋板8の開口部15、底板9の開口部16などの中心は、温度計本体のセンサー(図示せず)の中心とほぼ同軸に配置され、センサーからの視線Sを確保するように構成されている。
【0025】
以下に、本発明の温度測定装置の動作について説明する。
【0026】
本発明の温度測定装置は、前述のようにようローラー2の下方に、鋼板1(被測定物)の下面に対向して設置される。鋼板の温度を測定しないとき(測定待機中)は、温度測定装置の下部シャッター7は開閉装置26により、また、上部シャッター10は自重により、共に閉じられている。このとき、函体5内には空気供給口18から雰囲気維持用空気aが導入され、函体内をこれに収納されている温度計本体4が正常に作動するような適切な雰囲気、例えば温度、湿度、清浄度などに維持している。この空気は、水抜口25から主として排出される。
【0027】
上部、下部シャッターは共に閉じられているため、筒内、函体内には粉塵、水滴などが入るのが防止されるとともに、高温の鋼板からの熱が遮蔽され、温度計本体への熱の影響が軽減されている。
【0028】
鋼板の下面温度を測定する際には、筒体6の下部筒体6bの空気供給口19からシャッター開閉用空気aが導入され、空気吐出管20から上方に吹き出される。この空気aにより、自重によって下降し筒体上端の上部開口部17を閉鎖していた上部シャッター10が上方に押し上げられ、上部開口部17が開放される。このときのシャッター開閉用空気aは、上部シャッターを上に押し上げて、温度計からの視線を十分確保できる開度が得られる流量、圧力とすることが必要である。なお、この圧力が大き過ぎてもストッパー13により開度が制限されるため、シャッターが反転して自重により再度閉鎖できなくなることはない。
【0029】
次いで、開閉装置26を作動させて、下部シャッター7を開く。このとき、函体5内の空気は、空気供給口19から供給されたシャッター開閉用空気が上方へ排出される上向きの流れにより、筒体の方、すなわち上方に引き込まれるように流れるため、筒体内の空気が函体内に逆流し、粉塵などを筒体内に引き込む恐れはない。なお、函体5内の圧力が筒体6内の圧力より極端に小さいと、下部シャッター7を開いた際に、筒体内の空気が函体内に逆流し、粉塵などを筒体内に引き込む恐れもあるので、そのような場合は、函体内の圧力が、筒体内の圧力より極端に小さくならないように、供給する空気の流量、圧力を調整することが望ましい。
【0030】
なお、図1には記載を省略しているが、空気供給口18には空気開閉弁が設置されており、さらにこの開閉弁には上下シャッター開閉の制御装置が接続されている。そして下部シャッターの開閉装置26とともに、被測定体(鋼板)1の位置検出(トラッキング)や温度測定可否の指令に基づいて前記制御装置から上下シャッターの開閉を操作している。
【0031】
これによって、開口部15,16,17を経由して、温度計本体からの視線Pを鋼板下面に向けて確保することができるので、鋼板からの放射が温度計本体に到達し下面温度を測定することができる。測定中は、空気供給口18および19から空気が導入され、上部開口部17からは空気が高速で排出される状態が維持されるので、筒体および函体への粉塵、水滴などの侵入が抑制され、良好な測定環境を維持することができる。
【0032】
測定が終了した後、開閉装置26を作動させて下部シャッター7を閉じ、次いで、下部筒体6bの空気供給口19からの上部シャッター開閉用空気aの供給を停止する。この空気供給の停止によって上部シャッター10は、自重により下方に降下し、筒体6の上部開口部17は再び閉鎖される。なお、函体5への空気aの供給は停止せず、常時供給されており、温度計本体の状態を適正に維持する。
【0033】
これらにより、測定待機中、及び測定中においても筒体、および函体内への粉塵や水滴の侵入を防ぐことができ、温度計本体を良好な状態に保つことができ、長期にわたって安定して鋼板の下面温度を測定することができる。
【0034】
本発明の温度測定装置は、図4に示すように、圧延工程において鋼板の下面温度を測定するために鋼板を搬送するロールの間で、鋼板の下方に固定設置するのが一般的であるが、本測定装置を昇降可能な支持装置上に設置し、温度測定待機中は、支持装置を下降させ、測定装置を上記ロール面より十分下方に位置させ、温度測定時には支持装置を上昇させて測定装置をロール面近傍に位置させるようにすることも好ましい。
【0035】
本測定装置は、普通鋼、耐熱鋼など耐熱性のある材料で構成することができるが、水分の多い環境下であることも配慮して、耐食性を備えた材料であることも好ましい。
【0036】
【実施例】
本発明の図1に示すような温度測定装置を、図5に示すようにロールの間隙に設置し、圧延後の鋼板の下面温度を測定した。このとき、函体5へは、常時空気aを供給した。空気aの供給量は、圧力:0.1MPa、流量:600m/hとし、測定時の筒体への空気aの供給量は、圧力:0.3MPa、流量200m/hとした。
【0037】
なお、測定装置の温度計本体は、ファイバー温度計であり、鋼板下面からこの温度計の集光レンズの位置までの距離は約400mmとした。また、測定した鋼板の温度は、800℃〜200℃であった。
【0038】
従来の測定装置においては、レンズの汚れがひどく、汚れを除くための研磨によってレンズに傷がつき、測定精度が劣化していたが、本発明の温度測定装置では、長期間の使用後においても、粉塵や水滴によるレンズの汚れはなく、良好な測定結果が得られた。
【0039】
【発明の効果】
本発明の温度測定装置においては、温度計本体が、鋼板下面との間で、装置に設けられた上部と下部の二重のシャッターにより保護されていると共に、温度測定時には、供給空気の噴出によって、粉塵や水滴等の測定装置内への侵入を防止される。温度計本体の視線が良好に保持されるため、これを鋼板下面からより離れた位置においても測定が可能となり、長期にわたり精度の良い下面の温度測定が可能となる。また、上部のシャッターを自重により開閉する構造としたため省エネルギーの観点からも有利である。
【図面の簡単な説明】
【図1】本発明の温度測定装置の一実施例の正面概略図である。
【図2】本発明の温度測定装置の一実施例の側面概略図である。
【図3】本発明の温度測定装置における空気供給管の他の実施例を示す概略図であり、(a)は斜視図、(b)は(a)のA−A断面図である。
【図4】鋼板の下面を測定する状況を説明する図である。
【図5】従来の温度測定装置の構造を示す断面図である。
【符号の説明】
1…被測定体(鋼板)
2…ローラー
3…温度測定装置
4…温度計本体
5…函体
6…筒体
6a…上部筒体
6b…下部筒体
7…下部シャッター
8…蓋板
9…底板
10…上部シャッター
11…環状の支持部材
12…支持軸
13…ストッパー
14…温度計支持部材
15…蓋板の開口部
16…底板の開口部
17…上部開口部
18…空気供給口(雰囲気調整用)
19…空気供給口(上部シャッター開閉用)
20…空気吐出管(L字形状)
21…吐出口
22…空気吐出管(環形状)
23…計装用空気供給管
24…測定ケーブル
25…水抜口
26…開閉装置
27…近接スイッチ
50…温度計本体
51…レンズ
52…凸部
54…放射温度計
55…ドレン穴
56…視管
57…蓋
57’…穴
58…隔壁
58’…穴
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a temperature measuring device, and more specifically to a measuring device that measures the lower surface temperature of a metal object to be measured such as a steel slab, a steel plate, and a shaped steel during a rolling process from the lower surface side.
[0002]
[Prior art]
In recent years, excellent materials such as strength and toughness for steel plates and shaped steels have been demanded, and demands for these shapes have become strict. For this reason, the structure of the steel material can be adjusted to improve the material quality by controlling rolling that controls the rolling reduction according to the temperature of the steel material being rolled, and controlled cooling that controls the cooling rate during cooling during or after rolling. Many techniques are used. In addition, cooling after rolling controls the upper and lower surfaces of the steel material to eliminate the temperature difference between the upper and lower surfaces, preventing the occurrence of shape defects such as bending and warping after cooling due to this temperature difference. There are many things to do.
[0003]
In order to prevent the unevenness of the material and the occurrence of shape defects due to the temperature difference between the upper and lower surfaces of these steel materials, it is necessary to accurately measure and grasp the temperature difference between the upper and lower surfaces.
[0004]
However, in the rolling process, cooling water for cooling steel plates and removing scales, and cooling water for rolling rolls are supplied. Around the rolling process, cooling water, scales, etc. are scattered, dust, water vapor, etc. There are many floating.
[0005]
In the subsequent cooling process, too many water droplets and water vapor are floating. In order to accurately measure the temperature of a steel sheet in such an environment, measures have been conventionally taken to protect the temperature measuring device from high temperatures, moisture and dust.
[0006]
In particular, in the case of a temperature measuring device that measures the lower surface temperature of a steel plate, it is necessary to open the field of view opposite to the lower surface of the steel plate, and the water droplets, scale, dust, etc. supplied to the steel plate directly Since it easily adheres to the meter and its lens, accurate temperature measurement is hindered.
[0007]
FIG. 4 shows a situation in which the temperature of a metal object to be measured such as a shape steel or a steel plate is measured from the lower surface during the rolling process. A metal measurement object 1 (represented by a steel plate in the following description) is supported and conveyed by a roller 2. A temperature measuring device 3 is provided between the rollers 2 such that the measuring direction faces the lower surface of the steel plate, and the temperature of the steel plate is measured from the lower surface side. This temperature is utilized in the above control with the entire steel plate as the representative temperature or the temperature of the lower surface of the steel plate.
[0008]
In Japanese Utility Model Publication No. 60-38201, as shown in FIG. 5, when measuring the lower surface temperature, a thermometer main body 50 that collects radiation from a measured object by a lens 51 and measures the temperature, and this thermometer main body 50 is divided into a plurality of chambers by a plurality of partition walls 58 having a hole 58 ′ in the center, and a lid 57 having a drain hole 53 in each of the plurality of chambers and a hole 57 ′ in the center. There is disclosed a radiation thermometer 54 comprising a viewing tube 56 attached to the distal end and purge air supply means 55 connected to the lower part of the viewing tube for supplying high-pressure air into the viewing tube. The purge air flow A is blown at a high speed from the hole to prevent water droplets from falling on the lens of the thermometer.
[0009]
[Problems to be solved by the invention]
The above radiation thermometer is designed to prevent water drops, scales, etc. from dropping and adhering to the thermometer by blowing purge air from the hole in the visual tube when measuring the lower surface temperature of the object to be measured. As mentioned above, dust and water vapor are floating in the surrounding environment where the temperature of the steel sheet is measured. Even when measuring the temperature of the object to be measured, a large amount of purge air must be flowed at all times. There is a possibility that water droplets may adhere to the temperature measuring device, and it is not preferable from the viewpoint of energy saving to keep flowing a large amount of purge air all the time. Furthermore, it is exposed to radiant heat from the high-temperature steel plate even during measurement standby, which is not preferable for the thermometer body.
[0010]
[Means for Solving the Problems]
The present invention has been made to solve the above-described problems, and the gist thereof is as follows.
[0011]
A box containing a thermometer body is provided below the metal object to be measured, and an opening for measuring the temperature of the lower surface of the metal object to be measured by the thermometer body is provided in the box. A bottom surface temperature measuring device for a metal body to be measured, having a cylindrical body connected to the side facing the bottom surface of the body to be measured and having an air supply port in the box and the cylinder,
An upper shutter that is opened when air is supplied from the air supply port of the cylinder and is closed when the supply of air is stopped is provided at an opening facing the lower surface of the metal measurement object of the cylinder, and A lower surface temperature measuring device for a metal object to be measured, comprising a lower shutter for opening and closing an opening of the body.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The temperature measuring device of the present invention will be described with reference to the drawings of the embodiments of the present invention.
[0013]
FIG. 1 is a schematic front view of an apparatus according to an embodiment of the temperature measuring apparatus of the present invention, and FIG. 2 is a schematic side view of the apparatus according to an embodiment of the temperature measuring apparatus of the present invention.
[0014]
1 and 2, the temperature measuring device of the present invention includes a thermometer body 4, a box 5 that houses the thermometer body 4 and has an opening 15 above it and an air supply port 18. The cylinder 6 having an air supply port 19 and the upper shutter 10 provided with the upper opening 17 and the lower shutter 7 provided between the box 5 and the cylinder 6 are provided at the upper part of the box. Basically composed.
[0015]
A lid plate 8 provided with an opening 15 is provided at the top of the box 5, and a bottom plate 9 provided with a lower opening 16 is provided at the bottom of the cylinder 6. The lid 8 may be configured integrally with the box 5 and the bottom plate 9 may be configured integrally with the cylinder 6. A shutter 7 is provided between the bottom plate 9 and the cover plate 8 so as to be able to advance and retract. The shutter has a width and a length sufficient to close and open the openings 15 and 16 of the cover plate and the bottom plate, and one end of the shutter is connected to an opening / closing device 26 for moving the shutter back and forth. Yes. For example, as shown in FIG. 1, the bottom surface of the bottom plate 9 extends over a length from one end of the shutter to the other end, that is, the other end of the shutter is sufficient to close the openings 15 and 16 in the advance direction, and The shutter 7 advances and retreats through the gap between the bottom plate 9 and the lid plate 8 formed by the cutout with a thickness, width and thickness having a slight margin with respect to the width and thickness of the shutter. In FIG. 1, the bottom surface of the bottom plate 9 is cut out. However, a gap may be provided in which the shutter moves forward and backward by providing a cutout on the top surface of the lid plate or both the bottom surface of the bottom plate and the top surface of the lid plate. However, the present invention is not limited to these.
[0016]
As the opening / closing device 26, various driving devices such as a hydraulic cylinder, a pneumatic cylinder, a motor, an electromagnetic cylinder, and the like can be used. Further, it is preferable that the shutter 7 is provided with a proximity switch 27 to control the amount of movement of the shutter.
[0017]
A thermometer body 4 is fixed to the box 5 by a support 14 in the box 5.
[0018]
The thermometer body 4 may be a non-contact type thermometer such as an optical fiber thermometer or a radiation thermometer, and is not limited to this. The box 5 is provided with an air supply port 18 for maintaining a constant atmosphere in the box. The thermometer main body is provided with a measurement cable 24 for instructing measurement to the thermometer and transmitting the measurement result, and an instrument air supply pipe 23 for protecting the lens portion of the thermometer and the like. Further, a water outlet 25 is provided at the bottom of the box.
[0019]
A cylinder 6 is attached to the top of the box 5. The cylinder 6 is comprised from the lower cylinder 6b and the upper cylinder 6a attached upwards.
[0020]
As described above, the bottom plate 9 having the lower opening 16 is provided at the lower end of the lower cylindrical body 6b, and constitutes a member that supports the forward and backward movement of the shutter. The lower cylinder 6b is provided with an air supply port 19 for opening and closing an upper shutter, which will be described later. Since the air supplied from the air supply port 19 is for opening and closing the shutter, it may be provided in the vicinity of the shutter, but from the viewpoint of preventing entry of dust, water droplets, etc. into the inside of the cylinder. The air supply port is preferably provided in the lower part of the cylinder. In addition, in order to efficiently suppress dust, water droplets, and the like from entering from the upper opening 17, an L-shaped air discharge pipe 20 as shown in FIG. It is preferable that the opening portion is disposed so that the air is blown upward. More preferably, as shown in FIG. 3, an annular air discharge pipe 22 having a discharge port 21 directed inward and upward is disposed at the tip of the air supply port 19 in the cylinder. As a result, an upward flow can be formed more effectively.
[0021]
In this embodiment, the cylindrical body 6 is constituted by the upper cylindrical body 6a and the lower cylindrical body 6b, but may be integrated.
[0022]
An upper shutter 10 for opening and closing the opening is provided in the upper opening 17 at the upper end of the upper cylinder 6a. One end of the upper shutter 10 is supported by a support shaft 12 at one end of an annular support member 11 provided to surround the outer periphery in the vicinity of the upper end of the cylindrical body 6a. As rotatable.
[0023]
Further, a stopper 13 for limiting the range of rotation of the shutter to a range of less than 90 degrees from the horizontal position is provided at a position obliquely below the shaft 12 of the annular support member 11. Accordingly, the upper shutter 10 can close the upper opening 17 of the cylindrical body 6 by its own weight.
[0024]
The centers of the upper opening 17 at the end of the cylinder 6, the opening 15 of the cover plate 8, the opening 16 of the bottom plate 9, etc. are arranged substantially coaxially with the center of the sensor (not shown) of the thermometer body. The line of sight S from the sensor is secured.
[0025]
Below, operation | movement of the temperature measuring apparatus of this invention is demonstrated.
[0026]
As described above, the temperature measurement device of the present invention is installed below the roller 2 so as to face the lower surface of the steel plate 1 (measurement object). When the temperature of the steel sheet is not measured (waiting for measurement), the lower shutter 7 of the temperature measuring device is closed by the opening / closing device 26 and the upper shutter 10 is closed by its own weight. In this case, the box body 5 air is introduced a 1 for atmosphere maintained from the air supply port 18, suitable atmosphere, such as a thermometer body 4 housed a box-body thereto operates normally, for example, temperature , Maintain humidity, cleanliness, etc. This air is mainly discharged from the water outlet 25.
[0027]
Since both the upper and lower shutters are closed, dust and water droplets are prevented from entering the cylinder and box, and heat from the high-temperature steel sheet is shielded, affecting the thermometer body. Has been reduced.
[0028]
When the lower surface temperature of the steel plate is measured, the shutter opening / closing air a 2 is introduced from the air supply port 19 of the lower cylinder 6 b of the cylinder 6 and blown upward from the air discharge pipe 20. By this air a 2 , the upper shutter 10 that has been lowered by its own weight and closed the upper opening 17 at the upper end of the cylindrical body is pushed upward, and the upper opening 17 is opened. Shutter opening and closing air a 2 at this time, pushes up the upper shutter above, the flow rate of opening the line of sight from the thermometer be sufficiently ensured can be obtained, it is necessary to pressure. Even if the pressure is too high, the opening is limited by the stopper 13, so that the shutter does not reverse and cannot be closed again by its own weight.
[0029]
Next, the opening / closing device 26 is operated to open the lower shutter 7. At this time, the air in the box 5 flows so that the shutter opening / closing air supplied from the air supply port 19 flows upward so that the shutter opening / closing air is drawn upward. There is no risk that air in the body flows back into the box and dust is drawn into the cylinder. If the pressure in the box 5 is extremely smaller than the pressure in the cylinder 6, when the lower shutter 7 is opened, the air in the cylinder may flow back into the box, and dust may be drawn into the cylinder. Therefore, in such a case, it is desirable to adjust the flow rate and pressure of the supplied air so that the pressure in the box does not become extremely smaller than the pressure in the cylinder.
[0030]
Although not shown in FIG. 1, an air on / off valve is provided at the air supply port 18, and a control device for opening and closing the upper and lower shutters is connected to the on / off valve. Along with the opening / closing device 26 of the lower shutter, the control device operates to open / close the upper / lower shutters based on the position detection (tracking) of the object to be measured (steel plate) 1 and the temperature measurement enable / disable command.
[0031]
As a result, the line of sight P from the thermometer body can be secured toward the lower surface of the steel plate via the openings 15, 16, and 17, so that the radiation from the steel plate reaches the thermometer body and the lower surface temperature is measured. can do. During the measurement, air is introduced from the air supply ports 18 and 19 and the state in which the air is discharged from the upper opening 17 at a high speed is maintained, so that intrusion of dust, water droplets, etc. into the cylinder and the box is prevented. It is suppressed and a good measurement environment can be maintained.
[0032]
After the measurement is finished, close the lower shutter 7 by operating the switchgear 26 and then to stop the supply of the upper shutter opening and closing air a 2 from the air supply port 19 of the lower cylinder 6b. When the air supply is stopped, the upper shutter 10 is lowered downward by its own weight, and the upper opening 17 of the cylinder 6 is closed again. The supply of air a 1 to the box body 5 is not stopped and is supplied at all times, to properly maintain the state of the thermometer body.
[0033]
By these, it is possible to prevent dust and water droplets from entering the cylinder and the box during measurement standby, and during measurement, the thermometer body can be kept in a good state, and the steel plate is stable over a long period. Can be measured.
[0034]
As shown in FIG. 4, the temperature measuring device of the present invention is generally fixedly installed below the steel plate between rolls that convey the steel plate in order to measure the lower surface temperature of the steel plate in the rolling process. The measurement device is installed on a support device that can be raised and lowered, and during temperature measurement standby, the support device is lowered, the measurement device is positioned sufficiently below the roll surface, and the temperature is measured by raising the support device. It is also preferable to position the apparatus in the vicinity of the roll surface.
[0035]
This measuring apparatus can be made of a heat-resistant material such as plain steel or heat-resistant steel, but it is also preferable to use a material with corrosion resistance in consideration of the environment with much moisture.
[0036]
【Example】
A temperature measuring device as shown in FIG. 1 of the present invention was installed in the gap between the rolls as shown in FIG. 5, and the lower surface temperature of the rolled steel sheet was measured. At this time, to the box body 5, it was supplied continuously air a 1. The supply amount of the air a 1 was set to pressure: 0.1 MPa, the flow rate: 600 m 3 / h, and the supply amount of the air a 2 to the cylinder at the time of measurement was set to pressure: 0.3 MPa, the flow rate was 200 m 3 / h. .
[0037]
The thermometer body of the measuring device is a fiber thermometer, and the distance from the lower surface of the steel plate to the position of the condenser lens of the thermometer was about 400 mm. Moreover, the temperature of the measured steel plate was 800 degreeC-200 degreeC.
[0038]
In the conventional measuring device, the lens is very dirty, and the lens is scratched by polishing to remove the dirt, so that the measurement accuracy is deteriorated. The lens was not soiled by dust or water droplets, and good measurement results were obtained.
[0039]
【The invention's effect】
In the temperature measuring device of the present invention, the thermometer main body is protected between the lower surface of the steel plate by the upper and lower double shutters provided in the device, and at the time of temperature measurement, the supply air is blown out. Intrusion of dust and water droplets into the measuring device is prevented. Since the line of sight of the thermometer main body is satisfactorily maintained, it can be measured even at a position further away from the lower surface of the steel plate, and the temperature of the lower surface can be accurately measured over a long period of time. In addition, since the upper shutter is opened and closed by its own weight, it is advantageous from the viewpoint of energy saving.
[Brief description of the drawings]
FIG. 1 is a schematic front view of an embodiment of a temperature measuring device of the present invention.
FIG. 2 is a schematic side view of an embodiment of the temperature measuring device of the present invention.
FIGS. 3A and 3B are schematic views showing another embodiment of the air supply pipe in the temperature measuring device of the present invention, wherein FIG. 3A is a perspective view, and FIG.
FIG. 4 is a diagram illustrating a situation in which a lower surface of a steel plate is measured.
FIG. 5 is a cross-sectional view showing the structure of a conventional temperature measuring device.
[Explanation of symbols]
1 ... Measured object (steel plate)
DESCRIPTION OF SYMBOLS 2 ... Roller 3 ... Temperature measuring device 4 ... Thermometer main body 5 ... Box 6 ... Cylindrical body 6a ... Upper cylindrical body 6b ... Lower cylindrical body 7 ... Lower shutter 8 ... Cover plate 9 ... Bottom plate 10 ... Upper shutter 11 ... Ring-shaped Support member 12 ... support shaft 13 ... stopper 14 ... thermometer support member 15 ... lid plate opening 16 ... bottom plate opening 17 ... upper opening 18 ... air supply port (for atmosphere adjustment)
19 ... Air supply port (for opening and closing the upper shutter)
20 ... Air discharge pipe (L-shaped)
21 ... Discharge port 22 ... Air discharge pipe (annular shape)
23 ... Instrument air supply pipe 24 ... Measurement cable 25 ... Water outlet 26 ... Opening / closing device 27 ... Proximity switch 50 ... Thermometer body 51 ... Lens 52 ... Convex part 54 ... Radiation thermometer 55 ... Drain hole 56 ... Viewing tube 57 ... Lid 57 '... Hole 58 ... Bulkhead 58' ... Hole

Claims (1)

金属被測定体の下方に温度計本体を収容した函体を設け、前記函体に前記温度計本体により前記金属被測定体下面の温度を測定するための開口部を設け、該開口部の金属被測定体下面に対向する側に筒体を連通接続し、前記函体及び筒体に空気供給口を有する金属被測定体の下面温度測定装置であって、A box containing a thermometer body is provided below the metal object to be measured, and an opening for measuring the temperature of the lower surface of the metal object to be measured by the thermometer body is provided in the box. A bottom surface temperature measuring device for a metal body to be measured having a cylindrical body connected to the side facing the bottom surface of the body to be measured and having an air supply port in the box and the cylinder,
該筒体の空気供給口からの空気の供給により開放し、該空気の供給の停止により閉鎖する上部シャッターを、前記筒体の金属被測定体の下面に対向する開口部に設けると共に、前記函体の開口部を開閉するための下部シャッターを設けたことを特徴とする金属被測定体の下面温度測定装置。  An upper shutter that opens when air is supplied from the air supply port of the cylinder and closes when the air supply is stopped is provided at an opening facing the lower surface of the metal measurement object of the cylinder, and A lower surface temperature measuring device for a metal object to be measured, comprising a lower shutter for opening and closing an opening of the body.
JP2002108139A 2002-04-10 2002-04-10 Lower surface temperature measurement device for metal objects Expired - Fee Related JP3843036B2 (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
JP2012091185A (en) * 2010-10-25 2012-05-17 Kobe Steel Ltd Temperature measurement device

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JP4631021B2 (en) * 2004-03-12 2011-02-16 株式会社ディスコ Polishing equipment
ES2389838T3 (en) * 2004-04-14 2012-11-02 Baraldi Lubrificanti S.R.L. Procedure to optimize temperature regulation in technological processes
JP2008261814A (en) * 2007-04-13 2008-10-30 Toyota Motor Corp Transport surface temperature measurement system
JP7842334B2 (en) * 2022-02-17 2026-04-08 日本製鉄株式会社 Temperature measuring device, sheet metal speed control device, temperature measuring method, and sheet metal speed control method

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Publication number Priority date Publication date Assignee Title
JP2012091185A (en) * 2010-10-25 2012-05-17 Kobe Steel Ltd Temperature measurement device

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