| 摘要 |
A device for use in the removal of unwanted solids from stormwater drainage systems is disclosed. The device ( 1 ) comprises a lower unit ( 6 ) and an upper unit ( 7 ). The lower unit ( 6 ) is a substantially rectangular open-topped housing with tapering sides ( 8, 9 ) to its base ( 10 ). The upper portion of each of sides ( 8 ),( 9 ) includes a series of perforations ( 11, 12, 13 ), ( 14, 15, 16 ) across its width, the lower portion ( 26 ) of the sides ( 8, 9 ) being devoid of such perforations. The base ( 10 ) of the lower unit ( 6 ) includes a number of smaller size perforations ( 17 ). The upper unit ( 7 ) is, in top plan view, of substantially rectangular shape corresponding to that of the lower unit ( 6 ) to which it is removably fitted. The upper surface ( 22 ) of the upper unit ( 7 ) tapers downwards to an outlet ( 23 ). The outlet ( 23 ) includes a collar ( 24 ) which extends into the body of the lower unit ( 6 ). A raised essentially triangular shaped ridge ( 25 ), positioned centrally on the upper surface ( 22 ), extends substantially parallel to the longer sides of the upper unit ( 7 ) from one side of the upper unit ( 7 ) to the outlet ( 23 ). A removable water-permeable filter cloth ( 29 ) can be retained against the inner surfaces of the base ( 10 ) and sides ( 8, 9 ) of the lower unit ( 6 ).
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