C - Chemistry – Metallurgy – 25 – C
Patent
C - Chemistry, Metallurgy
25
C
C25C 3/06 (2006.01) E02F 3/413 (2006.01) B66C 3/16 (2006.01) B66C 17/06 (2006.01)
Patent
CA 2761504
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.
Unité de collecte (100), en particulier pelle à croûte (100') destinée au nettoyage des trous anodiques, comprenant un mât vertical mobile (9") actionné par un premier actionneur (50), un châssis (110) fixé sur ledit mât vertical mobile et au moins un godet (120a, 120b) articulé, caractérisé en ce que ledit premier actionneur (50) est au moins un vérin hydraulique (51) alimenté par un circuit hydraulique agencé de telle sorte que, au moins lorsqu'un deuxième actionneur actionne ledit godet, la pression d'huile dans la chambre côté tige (53) est maintenue à une valeur sensiblement constante permettant de supporter une charge correspondant au poids de ladite unité de collecte, diminué d'un effort de valeur prédéterminée, de préférence inférieure à 1000 daN, typiquement comprise entre 200 et 600 daN. Avantageusement, la portion de circuit (63) alimentant ladite chambre côté tige est munie d'un régulateur de pression (70). Un tel dispositif permet de collecter les débris en raclant le fond de cuve sans endommager celui-ci.
David Stephane
Wattel Arnaud
E.c.l.
Norton Rose Canada S.e.n.c.r.l.,s.r.l./llp
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