| 摘要 |
<p>The invention relates to a device (1), which can be arranged on a railway vehicle, and a method for cleaning of wall or ground surfaces (2), in particular inside tunnels of urban trams. The device (1) has several air nozzles (4) on a common holder (3)for suppliable compressed air arranged on either side of a suction orifice (5), designed as a suction nozzle of a suction hood (6). By setting the respective pressure such that the pressure of the front row of nozzles, with respect to the direction of travel, is less than the pressure of the rear row of nozzles, all kinds of pollutants, for example, objects, dust or other debris are picked up between the rows of nozzles. lf these pollutants are not directly picked up by the suction orifice (5) when driving over the same, these may however be moved along in the direction of travel by the relatively strong directed flow of compressed air of the rear row of nozzles, with the front row of nozzles at the same time forming a limit for the transport of the pollutants. The limitation of the wall and ground surface (2) beneath the suction orifice (5) of the suction results in a significant increase in efficiency.</p> |
