| 摘要 |
<p>Collecting unit (100), in particular a crust shovel (100') intended for cleaning the anode holes, comprising a moveable vertical mast (9") actuated by a first actuator (50), a frame (110) fixed to said moveable vertical mast and at least one hinged bucket (120a, 120b), characterized in that said first actuator (50) is at least one hydraulic cylinder (51) supplied by a hydraulic circuit designed in such a way that, at least when a second actuator actuates said bucket, the oil pressure in the chamber on the rod side (53) is maintained at a substantially constant value making it possible to support a load corresponding to the weight of said collecting unit, reduced by a load of predetermined value, preferably less than 1000 daN, typically between 200 and 600 daN. Advantageously, the circuit portion (63) supplying said chamber on the rod side is provided with a pressure regulator (70). Such a device enables the debris to be collected by scraping the bottom of a cell without damaging it.</p> |
