| 摘要 |
For cleaning and/or painting the exterior (18) of a ship hull while the ship (10) is in dry dock (14), one or more staging devices (32) are provided. Each includes a metal framework tower (34) supporting a vertically movable elevator assembly that comprises a trolley (36), from which a variably laterally projecting platform (40) is supported on articulated, cantilevered arms (38). Adjustable, non- porous shrouds (94), (102), (110), (122) enclose a volume of space (44) between the outside of the tower (34) and an increment (88) of one side of the exterior of the ship hull, from above, fore, aft and outside. Cleaning and painting operations are conducted from the platform (40) on the hull increment (88), and debris is removed from the dry-dock deck (12) area enclosed by the shroud, after which the device is moved by crane (20), typically twenty feet (6.1 m), towards the ship's bow (24) or stern (26). The shrouds (94), (102), (110), (122) are then adjusted so that a further hull increment (88) can be worked on. The trolley (36) and extension-retraction of the platform support arms are operated by electrohydraulic winch (60) and hydraulic cylinders (80), (84), respectively. The margins (112) of the shroud (94) may be fastened by magnets (114) to the hull (18). Air drawn through the enclosed volume from above at (120), is drawn out near the dry-dock deck (12) at (46) for processing to remove dust and appropriately treat VOCs, if present.
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