| 摘要 |
<p>A method of and apparatus for examining the condition of, for example, the bottom wall surface in VLCC tanks in which bell-mouth shaped lower ends (12) of oil outlet pipes (11) are disposed closely adjacent the bottom wall (10) of the vessel, and comprising a camera (14) mounted on an articulated arm system (15) so that it may be introduced through the narrow gap beneath the bell mouth pipe end and raised to an elevated position. The camera (14), preferably video, is connected to a remote and/or on-site monitor whereby the tank wall beneath the bell mouth may be inspected preferably with the aid of illumination from an array of lights (17) disposed around the camera lens (16). A pair of graduated scales (18) enable accurate location of the inspected site, and an ultrasonic probe (19) may be introduced also through the narrow gap beneath the bell mouth pipe end to provide a measurement of wall thickness. This method and apparatus enable accurate and ready inspection of the wall surface without the need for removal of a lower part of the outlet pipe.</p> |
