Decanter centrifuge with wear reinforcement inlet

B - Operations – Transporting – 04 – B

Patent

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Details

B04B 1/20 (2006.01)

Patent

CA 2478832

A decanter centrifuge has a hollow, rotatable drum with a screw conveyor comprising a core body (1), in which an inlet opening for material into the drum from an inlet chamber (3) is provided, the inlet opening having a delimitation surface (7) which is rear relative to the direction of rotation and extending substantially axially, said delimitation surface being provided with a wear reinforcement member (8). The wear reinforcement member extends along the rear delimitation surface (7) into the inlet chamber (3). The wear reinforcement member (8) is provided with abutment surfaces (11; 19) in abutment against abutment surfaces associated with the core body, which during operation prevents the wear reinforcement member (8) from moving tangentially forwards in the direction of rotation and radially out of the core body (1). At least one of said abutment surfaces associated with the core body (1) is constituted by a removable blocking member (17). The wear reinforcement member (8) and the inlet opening (5) are designed in such a manner that the wear reinforcement member (8) can be introduced to its operating from the exterior side of the core body (1).

La présente invention concerne une centrifugeuse-décanteur présentant, un tambour rotatif creux doté d'un transporteur à vis comprenant une portion centrale (1), dans lequel est pratiquée une ouverture d'admission permettant l'entrée d'un matériau dans le tambour depuis une enceinte d'admission (3). L'ouverture d'admission présente une surface de délimitation (7) qui est située en arrière par rapport au sens de rotation et qui s'étend essentiellement dans l'axe. Cette surface de délimitation est pourvue d'un élément de renfort (8) contre l'usure qui s'étend le long de la surface de délimitation (7) arrière dans l'enceinte d'admission (3). L'élément de renfort (8) présente des surfaces de butée (11, 19) en butée contre les surfaces de butée de la portion centrale (1), ce qui permet, pendant le fonctionnement, d'empêcher que l'élément (8) ne se déplace tangentiellement vers l'avant dans le sens de rotation et autour de la portion centrale (1). Au moins l'une des surfaces de butée de la portion centrale (1) est constituée d'un élément bloquant amovible (17). L'élément (8) et l'ouverture d'admission (5) sont conçus de telle sorte que l'élément (8) peut être introduit dans sa position opérationnelle depuis l'extérieur de la portion centrale (1).

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