| 摘要 |
A water tank module (6) consists of a frame (7) and a number of horizontally extending sheets (8) of corrugated steel are covered on one side by food grade polymer. The frame (7) comprises a pair of substantially vertical longitudinal angle irons (9) having two perpendicular flanges (10 and 11) joined by a pair of substantially horizontal angle irons (13) curved in their longitudinal direction so as to have a radius of curvature appropriate to the size tank which is to be constructed from the modules. The horizontal angle irons (13) have two flanges (15 and 16), a first one of which (15) extends transversely to the frame so as to extend in the same direction as radial flanges (10) of angle irons (9). The other flanges (11 and 16) of the angle irons (9 and 13) are arranged to extend inwardly in the plane of the frame (7) on the outer side as compared to the curvature of the frame (7) so as to lie on the outside of the tank when it is constructed. The completed frames (7) are galvanised and then the sheets (8) are mounted thereto. A number of such modules are bolted together through apertures (12) in the flanges (10) to form the tank and a plastic sheet is then sealed to the bottom flanges (15) to form the bottom of the tank. The modules are thus easily transportable and the tank can be constructed on site. |
