Sewer cleaning system for sanitation vehicle, has sand extraction device comprising cup and transporter for permitting cup to extract sand from extraction zone of sewer and to rise sand above level of effluents

摘要

The system has a sand extraction device (30) holding a curved channel (10) of a sewer in which effluents are discharged. The extraction device comprises a cup (74) and a transporter (34) for permitting the cup to extract the sand from an extraction zone of the sewer and to rise the sand above the level of the effluents, where the extraction zone is formed by a volume located below the level of the effluents and delimited by the cup.