发明名称 |
DEVICE FOR DETECTING LEAKAGE OF LIQUIID IN TANK |
摘要 |
<p>A device placed in a tank and used for detecting a leakage of liquid in the tank. Vertical measurement tube passages (10, 14) into which the liquid in the tank is introduced have a measurement tube (10) and a measurement thin tube (14). The measurement thin tube (14) communicates with the measurement tube and is located lower than the measurement tube. The measurement thin tube has a cross-sectional area that is equal to or smaller than 1/50 of that of the measurement tube. A thermal flow sensor (16) used for measuring a liquid flow rate is attached to the measurement thin tube (14). There is provided leakage detecting means (22) for detecting a leakage of liquid in the tank according to the flow rate value measured by the sensor. The leakage detecting means generates a leakage detection signal when a flow rate value measured by the sensor is within a range greater than 0 and smaller than the flow rate value obtained when liquid is added to the tank or when the liquid in the tank is taken out. Thus, even a leakage of a very small amount is detected easily and accurately without stopping the use of the tank. <IMAGE></p> |
申请公布号 |
EP1469294(A1) |
申请公布日期 |
2004.10.20 |
申请号 |
EP20020788827 |
申请日期 |
2002.12.13 |
申请人 |
MITSUI MINING & SMELTING CO., LTD. |
发明人 |
KOIKE, ATSUSHI;YAMAGISHI, KIYOSHI;TAKAHATA, TAKAYUKI;NAKAMURA, TOSHIMI;KAWANISHI, TOSHIAKI |
分类号 |
G01F1/00;G01M3/04;G01M3/26;G01M3/32;(IPC1-7):G01M3/26 |
主分类号 |
G01F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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