SCREENING GRID ON AN OVERFLOW SPILLWAY OF A RAINWATER RELIEF SYSTEM
In a screening grid (1) on an overflow spillway (21) of a rainwater relief system (20), comprising grid bars (2) extending transversely to the overflow spillway (21) and scrapers (4) engaging in comb-like fashion in the grid bars (2), according to the invention the scrapers (4) are caused, via a crank drive (8) to make a curvilinear circular movement by means of an actuating lever (6) cooperating with a fixed support bearing (7), through which movement the scrapers (4) are guided from above into the gaps (3) between the grid bars (2) and withdrawn again at the bottom of the overflow spillway (21). As a result, the risk of solids being discharged into the waterways due to mechanical action on the solids during the scraping operation is reduced and the operational reliability is increased.