High-speed cutting dredger

E - Fixed Constructions – 02 – F

Patent

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E02F 3/88 (2006.01)

Patent

CA 2128970

A method and apparatus for high-speed rotary cutting and suctioning of dredged material in which a baffle wall interrupts fluid eddies that would otherwise be induced by the rotary motion of the cutters and counteract the suctioning. The baffle wall is provided with pressure-sensitive removal and automatic return means, illustrated as a pin and hinge in combination with a spring, so that if a piece of hard material is momentarily lifted by the cutters and strikes the baffle, the baffle will move away allowing the material to be thrown without damaging baffle or cutters. Thereafter the baffle is returned to position. The illustrated embodiment shows this system in place in a dredger with replaceable digging edge, adjustable height assembly, and removable bottom and rear plates.

Méthode et appareil pour le hachage rotatif et l'aspiration à haute vitesse de déblais de dragage. Un mur déflecteur dans l'appareil interrompt les remous qui autrement seraient créés par le mouvement rotatif des lames et neutraliseraient l'aspiration. Il comprend un élément de retrait sensible à la pression et un élément de retour automatique, illustré comme une goupille et une charnière combinées à un ressort. Ainsi, si un morceau de matière dure est soulevé momentanément par les lames et frappe le mur déflecteur, ce dernier s'éloignera de façon à permettre au morceau d'être lancé sans endommager le mur ou les lames. Ensuite, le mur retourne dans sa position initiale. Le modèle de l'invention illustre ce système installé dans une drague avec un bord de creusage remplaçable, un appareillage pour régler la hauteur et des plaques inférieure et arrière amovibles.

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