JP2002340725A - Method for sensing leakage of cooling medium - Google Patents
Method for sensing leakage of cooling mediumInfo
- Publication number
- JP2002340725A JP2002340725A JP2001141558A JP2001141558A JP2002340725A JP 2002340725 A JP2002340725 A JP 2002340725A JP 2001141558 A JP2001141558 A JP 2001141558A JP 2001141558 A JP2001141558 A JP 2001141558A JP 2002340725 A JP2002340725 A JP 2002340725A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- cooling medium
- difference
- inlet
- outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Examining Or Testing Airtightness (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、冷却対象を冷却
する冷却媒体の流路入口および出口の流量を測定してい
る装置またはプラントにおいて、微小な冷却媒体の漏れ
を検知することが可能な検知方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detection device capable of detecting minute leakage of a cooling medium in an apparatus or a plant which measures the flow rate of a cooling medium for cooling a cooling object at an inlet and an outlet of the cooling medium. About the method.
【0002】[0002]
【従来の技術】従来、この種の方法としては、装置また
はプラントの冷却媒体の通路出入口の流量を測定し、そ
の差流量を監視するのが一般的である。2. Description of the Related Art Conventionally, as a method of this type, it is common to measure a flow rate of a cooling medium in an apparatus or a plant at an inlet / outlet of a cooling medium, and to monitor a difference flow rate.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、例えば
転炉のランスやサブランスを冷却水を用いて冷却する場
合、冷却水等の冷却媒体はその流路の入口と出口とで温
度差による影響を受け易いばかりでなく(バッチプラン
トでは特に受け易い)、計測器のばらつきによって誤差
を生じる等の問題がある。したがって、この発明の課題
は、温度差や計測器の個体差による影響等を受け難く
し、微小な差流量を精度良く検知可能にすることにあ
る。However, for example, when cooling a lance or sub-lance of a converter using cooling water, a cooling medium such as cooling water is affected by a temperature difference between an inlet and an outlet of the flow passage. Not only is it easy (especially in a batch plant), but there is a problem that errors occur due to variations in measuring instruments. Therefore, an object of the present invention is to make it difficult to be affected by a temperature difference, an individual difference of a measuring instrument, and the like, and to enable a minute difference flow rate to be accurately detected.
【0004】[0004]
【課題を解決するための手段】このような課題を解決す
るため、請求項1の発明では、冷却対象を冷却する冷却
媒体の流路入口および出口にそれぞれ流量計を設けてな
る設備において、前記設備の状態変化が発生した後の所
定時間経過後に、その時点の前記入口と出口との差流量
を漏れ流量の基点としてゼロ点補正し、その後の差流量
信号を監視することにより、前記冷却媒体の微小な漏れ
を検出可能にしたことを特徴とする。上記請求項1の発
明においては、前記入口と出口との差流量は、常時監視
することができる(請求項2の発明)。ここで、設備の
状態変化とは、例えばバッチプロセスである転炉のラン
スの場合には吹錬開始に相当する。すなわち、ランスが
下降し酸素ブローを開始し、それとともに脱炭反応によ
る発熱により、ランスが熱せられ冷却水の温度も上昇す
る。温度の上昇速度は当初大きく、次第に小さくなりほ
ぼゼロに近づく。温度の上昇速度が大きい時は流量測定
系も安定せず、測定誤差も大きい。したがって、吹錬開
始から所定時間経過して流量測定系がほぼ安定するタイ
ミングに、流路の入口と出口の差流量を漏れ流量監視の
基点とする。連続プロセスの場合には、設備の状態変化
としては、たとえば、冷却水流量自体の絶対値を変化さ
せるケースがある。In order to solve such a problem, according to the invention of claim 1, in a facility provided with flow meters at the inlet and the outlet of a flow path of a cooling medium for cooling an object to be cooled, After a lapse of a predetermined time after the state change of the equipment has occurred, the difference flow rate between the inlet and the outlet at that time is corrected to a zero point as a base point of the leak flow rate, and the cooling medium is monitored by monitoring the difference flow rate signal thereafter. Characterized in that minute leaks can be detected. In the first aspect of the invention, the flow rate difference between the inlet and the outlet can be constantly monitored (the invention of the second aspect). Here, the state change of the equipment corresponds to, for example, the start of blowing in the case of a lance of a converter which is a batch process. That is, the lance is lowered to start oxygen blowing, and at the same time, the heat generated by the decarburization reaction heats the lance and raises the temperature of the cooling water. The rate of temperature rise is initially high, gradually decreases, and approaches zero. When the temperature rise rate is high, the flow measurement system is not stable, and the measurement error is large. Therefore, at a timing when the flow rate measurement system becomes substantially stable after a predetermined time has elapsed from the start of blowing, the difference flow rate between the inlet and the outlet of the flow path is used as a base point for monitoring the leak flow rate. In the case of a continuous process, the state of the equipment may be changed, for example, by changing the absolute value of the cooling water flow rate itself.
【0005】[0005]
【発明の実施の形態】図1はこの発明の実施の形態を説
明するための説明図である。なお、図1の符号1,2は
電磁流量計等の流量検出器、3は差流量演算器、6は減
算・乗算器、8は装置を示す。装置8として、ここでは
例えば転炉のランスまたはサブランスを想定している
が、これに限定されないのは勿論である。また、符号
4,7は演算器3,6の演算結果である差流量をそれぞ
れ監視する監視装置またはその監視機能,動作を示し、
符号5は設備の状態変化が発生した後の所定時間経過後
に与えられる指令Sによって演算器3の出力を記憶する
メモリまたはその内容(初期差流量)を示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory diagram for explaining an embodiment of the present invention. 1, reference numerals 1 and 2 denote flow detectors such as an electromagnetic flow meter, 3 denotes a difference flow calculator, 6 denotes a subtraction / multiplier, and 8 denotes a device. Here, the apparatus 8 is assumed to be, for example, a lance or a sub-lance of a converter, but is not limited to this. Reference numerals 4 and 7 denote a monitoring device for monitoring the difference flow rate as a calculation result of the calculators 3 and 6, respectively, or a monitoring function and operation thereof.
Reference numeral 5 denotes a memory for storing the output of the arithmetic unit 3 or its contents (initial differential flow rate) in accordance with a command S given after a lapse of a predetermined time after the state change of the equipment has occurred.
【0006】すなわち、冷却水等の冷却媒体はその入口
と出口で、流量検出器1,2によりそれぞれ流量A,B
を検出し、差流量演算器3でその差(A−B)を算出
し、差流量監視を行なう点は従来の場合と同じである。
そして、差流量監視を所定時間行なってこれが一定範囲
内ならば、記憶指令Sを出してその時点での差流量演算
器3からの出力である差流量Cを初期差流量Dとして記
憶する(符号5参照)。この発明は、この値Dを差流量
のゼロ点(基点)とみなすとともに、さらに、減算・乗
算器6によって差流量演算器3の出力である差流量(変
化量)Cと上記Dとの差(C−D)を求め、これを増幅
または所定係数倍(α)してその結果を監視するように
している(符号7参照)。That is, a cooling medium such as cooling water flows at its inlet and outlet by flow detectors 1 and 2 at flow rates A and B, respectively.
Is detected by the difference flow calculator 3 and the difference (AB) is calculated, and the difference flow is monitored as in the conventional case.
Then, the difference flow monitoring is performed for a predetermined time, and if the difference flow is within a certain range, a storage command S is issued and the difference flow rate C, which is the output from the difference flow rate calculator 3 at that time, is stored as the initial difference flow rate D (reference numeral). 5). The present invention regards this value D as the zero point (base point) of the difference flow rate, and further uses the subtraction / multiplier 6 to calculate the difference between the difference flow rate (change amount) C output from the difference flow rate calculator 3 and the above D. (CD) is obtained, amplified or multiplied by a predetermined coefficient (α), and the result is monitored (see reference numeral 7).
【0007】なお、上記差流量(A−B)が所定範囲外
となるときは指令Sを出さないようにするとともに、異
常として警報を発するか、または操業を停止する等の操
作を行なうこととする。以上のようにすることにより、
煩雑な温度補正が不要となるとともに、計器の精度にも
無関係にすることができて高精度な検知,監視が可能と
なる。When the differential flow rate (AB) is out of the predetermined range, it is necessary not to issue the command S and to perform an operation such as issuing an alarm as an abnormality or stopping the operation. I do. By doing the above,
Complicated temperature correction becomes unnecessary, and it can be made independent of the accuracy of the instrument, thereby enabling highly accurate detection and monitoring.
【0008】[0008]
【発明の効果】この発明によれば、装置の状態変化が生
じた所定時間経過後の入口と出口の差流量を基点とし
て、その後の変化を監視するようにすることで、煩雑な
温度補正を不要にできるだけでなく、計器の精度も殆ど
無視することができ、精度の高い監視が可能となる利点
が得られる。したがって、この発明は操業を連続的に行
なうプラントよりも、操業の運転,停止を頻繁に(繰り
返し)行なうバッチプラントに、特に適していると言え
る。According to the present invention, a complicated temperature correction can be performed by monitoring a subsequent change based on a difference flow between the inlet and the outlet after a lapse of a predetermined time when the state of the apparatus has changed. Not only can it be unnecessary, but also the accuracy of the instrument can be almost neglected, and the advantage of high-precision monitoring can be obtained. Therefore, it can be said that the present invention is particularly suitable for a batch plant in which the operation is started and stopped frequently (repeatedly), rather than a plant in which the operation is continuously performed.
【図1】この発明の実施の形態を説明する説明図であ
る。FIG. 1 is an explanatory diagram illustrating an embodiment of the present invention.
1,2…流量検出器、3…差流量演算器、4,7…差流
量監視、5…初期差流量、6…減算・乗算器、8…装置
(ランスまたはサブランス)、S…差流量記憶指令。1, 2, flow rate detector, 3, differential flow rate calculator, 4, 7 differential flow rate monitor, 5 initial differential flow rate, 6 subtraction / multiplier, 8 apparatus (lance or sublance), S, differential flow rate storage Command.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大須 康博 神奈川県川崎市川崎区田辺新田1番1号 富士電機株式会社内 (72)発明者 松本 俊司 千葉県富津市新富20−1 新日本製鐵株式 会社技術開発本部内 (72)発明者 堀越 清美 千葉県富津市新富20−1 新日本製鐵株式 会社技術開発本部内 (72)発明者 松尾 誠治 福岡県北九州市戸畑区飛幡町1−1 新日 本製鐵株式会社八幡製鐵所内 (72)発明者 八久保 平 福岡県北九州市戸畑区飛幡町1−1 新日 本製鐵株式会社八幡製鐵所内 Fターム(参考) 2F030 CB02 CC19 CD11 CF11 2G067 AA34 BB02 CC01 DD04 EE09 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuhiro Osu 1-1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Fuji Electric Co., Ltd. (72) Inventor Shunji Matsumoto 20-1 Shintomi, Futtsu-shi, Chiba New Japan (72) Inventor Kiyomi Horikoshi 20-1 Shintomi, Futtsu City, Chiba Prefecture Nippon Steel Corporation Technology Development Headquarters (72) Inventor Seiji Matsuo 1-1 1-1 Tobata-cho, Tobata-ku, Kitakyushu, Fukuoka Prefecture Inside Nippon Steel Corporation Yawata Works (72) Inventor Taira Yakubo 1-1 1-1 Tobata-cho, Tobata-ku, Kitakyushu-shi, Fukuoka F-term (reference) 2F030 CB02 CC19 CD11 CF11 2G067 AA34 BB02 CC01 DD04 EE09
Claims (2)
および出口にそれぞれ流量計を設けてなる設備におい
て、 前記設備の状態変化が発生した後の所定時間経過後に、
その時点の前記入口と出口との差流量を漏れ流量の基点
としてゼロ点補正し、その後の差流量信号を監視するこ
とにより、前記冷却媒体の微小な漏れを検出可能にした
ことを特徴とする冷却媒体の漏れ検知方法。1. In a facility provided with a flow meter at each of an inlet and an outlet of a cooling medium for cooling a cooling object, after a lapse of a predetermined time after a change in the state of the facility,
The differential flow rate between the inlet and the outlet at that time is corrected to a zero point as a base point of the leak flow rate, and by monitoring the differential flow rate signal thereafter, a minute leak of the cooling medium can be detected. Cooling medium leak detection method.
することを特徴とする請求項1に記載の冷却媒体の漏れ
検知方法。2. The method according to claim 1, wherein the flow rate difference between the inlet and the outlet is constantly monitored.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2001141558A JP2002340725A (en) | 2001-05-11 | 2001-05-11 | Method for sensing leakage of cooling medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001141558A JP2002340725A (en) | 2001-05-11 | 2001-05-11 | Method for sensing leakage of cooling medium |
Publications (1)
Publication Number | Publication Date |
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JP2002340725A true JP2002340725A (en) | 2002-11-27 |
Family
ID=18988000
Family Applications (1)
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JP2001141558A Pending JP2002340725A (en) | 2001-05-11 | 2001-05-11 | Method for sensing leakage of cooling medium |
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JP (1) | JP2002340725A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102507110A (en) * | 2011-11-03 | 2012-06-20 | 云南新立有色金属有限公司 | Method for detecting leakage of cooling water for high titanium slag direct current closed electric furnace |
WO2013146071A1 (en) * | 2012-03-30 | 2013-10-03 | カルソニックカンセイ株式会社 | Integrated cooling system |
CN110319986A (en) * | 2019-07-12 | 2019-10-11 | 马鞍山钢铁股份有限公司 | A kind of converter oxygen gun water leakage monitoring method |
-
2001
- 2001-05-11 JP JP2001141558A patent/JP2002340725A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102507110A (en) * | 2011-11-03 | 2012-06-20 | 云南新立有色金属有限公司 | Method for detecting leakage of cooling water for high titanium slag direct current closed electric furnace |
WO2013146071A1 (en) * | 2012-03-30 | 2013-10-03 | カルソニックカンセイ株式会社 | Integrated cooling system |
EP2835611A4 (en) * | 2012-03-30 | 2016-01-20 | Calsonic Kansei Corp | Integrated cooling system |
CN110319986A (en) * | 2019-07-12 | 2019-10-11 | 马鞍山钢铁股份有限公司 | A kind of converter oxygen gun water leakage monitoring method |
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