| 摘要 |
Device and method for cleaning a drain pipe by ensuring the formation of at least two successive distinct water waves flowing in the pipe, with or without additive(s). The device comprises: a reservoir (R) comprising distinct separate compartments (C1, C2, C3, C4), each compartment (C1, C2, C3, C4) provided with an outlet opening; an outlet (10) adapted to be connected to the drain pipe, said outlet (10) being associated with a knife valve (KV) actuated by actuating mechanism (8) between a fully closed position and a fully open position; a duct (30) comprising several distinct channels (11A, 11B, 11C, 11D) extending each between the outlet opening of a compartment and an outlet opening (11A1, 11B1, 11C1, 11D1) of the channel considered adjacent to the outlet (10) of the device, said duct (30) comprising a curved portion of 45 to about 90°; whereby the knife valve (KV) is adapted to move from a fully closed position up to a fully open position, with intermediate positions for which one or more outlet openings (11A1, 11B1, 11C1, 11D1) of one or more channels (11A, 11B, 11C, 11D) are not closed; in which the different channels (11A, 11B, 11C, 11D) are provided adjacent to their outlet opening with a honeycomb structure adapted for generating a laminar flow for the water flowing through said outlet opening (10) when not closed by the knife valve (KV). |
