Asphalt drum mixer with self-scouring drum

B - Operations – Transporting – 01 – F

Patent

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Details

B01F 15/06 (2006.01) B01F 9/08 (2006.01) B01F 15/00 (2006.01) E01C 19/10 (2006.01)

Patent

CA 2176241

A drum mixer (10) includes an elongate hollow rotatable drum (12) having an outer surface, a sleeve (32) having an inner surface, the sleeve being mounted coaxially with the elongate hollow rotatable drum and so as to define an annular chamber (34), and structure for mixing hot mix asphalt in the annular chamber including rake flights (50) mounted on the outer surface of the elongate hollow rotatable drum (12) and in the annular chamber (34) including scouring structure for lifting hot mix asphalt up from a lower portion of the annular chamber along the inner surface of the sleeve (32) through the annular chamber and onto an upper portion of the outer surface of the elongate hollow rotatable drum, the scouring structure including a plurality of shaped scouring fingers (56) extending radially toward the outer surface of the elongate hollow rotatable drum so as to break up hot mix asphalt.

Un mélangeur à tambour (10) comprend un tambour (12) rotatif creux et allongé, qui possède une surface extérieure, un manchon (32) pourvu d'une surface intérieure, qui est monté de façon coaxiale par rapport au tambour rotatif creux et allongé de façon à définir une chambre annulaire (34), et une structure permettant de mélanger de l'asphalte à chaud dans la chambre annulaire, qui comprend des rangées de râteaux (50) montées sur la surface extérieure du tambour (12) rotatif creux et allongé et dans la chambre annulaire (34), avec une structure de raclage destinée à soulever l'asphalte mélangé à chaud, à partir d'une partie inférieure de la chambre annulaire, le long de la surface intérieure du manchon (32) à travers la chambre annulaire jusqu'à une partie supérieure de la surface extérieure du tambour rotatif creux et allongé. La structure de raclage comprend une pluralité de pattes de raclage profilées (54), qui s'étendent dans le sens radial vers la surface extérieure du tambour rotatif creux et allongé afin de briser l'asphalte mélangé à chaud.

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