Public drains cleaning device

摘要

A cleaning device with a rinse-suction assembly, a sludge chamber, a filter chamber and a grey water chamber. Sludge is sucked into the sludge chamber by a pipe. Water bearing sludge skimmed from the surface is pre-cleaned in the filter chamber, and the pre-cleaned water is then further cleaned before it is discharged into the grey water chamber. The device is a back-flush filter (16) consisting of a housing with a filter mantle (18) and end-discs (19, 20) with water inlet (21, 22) and a suction outlet (23,24). A sliding piston (26) is secured to the filter mantle.