Leakage detector and leakage detection system using the same

A leak detector for detecting leakage of liquid stored in a tank based on fluctuation in a level of the liquid, the leak detector comprising:

• a liquid retaining portion including a space configured to retain liquid flown into the leak detector, the liquid flown being a part of the liquid in the tank;
• a flow path portion through which the space communicates with an interior of the tank and through which the liquid flows in and out;
• a flow path opening/closing unit configured to open and close at least one end of the flow path portion;
• a flow-rate measuring unit configured to measure an amount of the liquid flowing inside the flow path portion;
• and
• a calibrating unit configured to calibrate the flow-rate measuring unit.

A leak detector for detecting leakage of liquid stored in a tank based on fluctuation in a level of the liquid, the tank including a top plate, a bottom plate, and a side plate connecting the top plate and the bottom plate, the top plate includes a through opening, the leak detector comprising:

• a liquid retaining portion including a space configured to retain liquid flown into the leak detector, the liquid flown being a part of the liquid in the tank;
• a flow path portion through which the space communicates with an interior of the tank and through which the liquid flows in and out;
• a flow path opening/closing unit configured to open and close at least one end of the flow path portion;
• a flow-rate measuring unit configured to measure an amount of the liquid flowing inside the flow path portion;
• and
• a calibrating unit configured to calibrate the flow-rate measuring unit, wherein
• the leak detector is arranged inside the tank in such a manner that a first end of the leak detector is detachably attached to the bottom plate and a second end of the leak detector is supported in the through opening in such a manner that the leak detector is movable in a direction substantially perpendicular to a surface of the liquid.

A leak detecting system for detecting leakage of liquid stored in a tank based on fluctuation in a level of the liquid, the leak detecting system comprising:

• a leak detector including
• a liquid retaining portion including a space configured to retain liquid flown into the leak detector, the liquid flown being a part of the liquid in the tank;
• a flow path portion through which the space communicates with an interior of the tank and through which the liquid flows in and out;
• a flow path opening/closing unit configured to open and close at least one end of the flow path portion;
• a flow-rate measuring unit configured to measure an amount of the liquid flowing inside the flow path portion;
• and
• a calibrating unit configured to calibrate the flow-rate measuring unit;
• and
• a controller configured to control the leak detector.

A leak detecting system for detecting leakage of liquid stored in a tank based on fluctuation in a level of the liquid, the tank including a top plate, a bottom plate, and a side plate connecting the top plate and the bottom plate, the top plate includes a through opening, the leak detecting system comprising:

• a leak detector including
• a liquid retaining portion including a space configured to retain liquid flown into the leak detector, the liquid flown being a part of the liquid in the tank;
• a flow path portion through which the space communicates with an interior of the tank and through which the liquid flows in and out;
• a flow path opening/closing unit configured to open and close at least one end of the flow path portion;
• a flow-rate measuring unit configured to measure an amount of the liquid flowing inside the flow path portion;
• and
• a calibrating unit configured to calibrate the flow-rate measuring unit;
• and
• a controller configured to control the leak detector, wherein
• the leak detector is arranged inside the tank in such a manner that a first end of the leak detector is detachably attached to the bottom plate and a second end of the leak detector is supported in the through opening in such a manner that the leak detector is movable in a direction substantially perpendicular to a surface of the liquid.