| 摘要 |
<p>Cleaning apparatus for an object (6) with a moving surface (2), such as a roll, is described having a nozzle head (4) with a suction nozzle (26) and a jet nozzle (24) located therein to emit a liquid jet towards the roll, a subpressure being maintained in the chamber (32) of the suction nozzle in order to evacuate liquid and released impurities with the aid of air flowing in through a gap (34) between the roll and the orifice edge (29). According to the invention the jet nozzle is arranged spaced from the inside (42) of the suction nozzle (26) and at the centre of the suction nozzle to form a circumferential passage (43) between the inside (42) and the jet nozzle, said passage communicating with an evacuation pipe (12). The nozzle head also includes means (44) for supplying compressed air into the chamber (32) via said gap (34) in order to encounter and carry with it liquid and impurities towards and through said passage in cooperation with the suction effect maintained in the chamber (32) and evacuation pipe (12). The compressed air thus supplied also has a favourable drying effect on the roll treated with liquid.</p> |
