DEPOSIT THICKNESS MEASURING INSTRUMENT FOR TANK BOTTOM DEPOSIT

摘要

PURPOSE:To measure the thickness of deposits accurately in safety without being affected by a flow even during water intake operation by providing a manometer on an underwater self-running car capable of running on the deposits, and detecting the depth from the surface of water to the manometer and measuring the thickness of the deposits. CONSTITUTION:The underwater self-running car 3 is provided with the manometer 8 and a water gauge 9 is provided on the upper edge of an intake tank 7; and a cable 11 for control is connected between an underwater running sand discharging device 1 and a controller 10 provided on the ground to supply a control command signal from the controller 10 to the underwater running sand discharging device 1 and also transmit data from the manometer 8 to the controller 10. The controller 10 is equipped with an arithmetic unit 12 and data from the manometer 8 and water gauge 9 are converted by an analog-digital converting circuit 13 and supplied to the arithmetic unit 12. The known depth HD of the water intake tank 7, the installation height HM of the manometer 8 provided on the underwater self-running car 3, and the water level H1 measured by the water gauge 9, and the depth H2 from the water surface to the manometer 8 are operated to measure the deposit thickness Hs of the deposits 2 by computation.