Heavy duty material processing shears

Details Heavy duty material processing shears Heavy duty material processing shears

B - Operations, Transporting

23

D

B23D 17/06 (2006.01) B23D 35/00 (2006.01)

Patent

CA 2655981

A heavy-duty material processing shears includes pivotally connected jaws (20, 30) and a hydraulic cylinder (50) operatively extending between the jaws to open and close the jaws. One of the jaws includes a cutting blade (200) with a substantially convex cutting edge. The cutting blade's surfaces intersect at an acute angle to define the cutting edge. The cutting blade's shape enables it to efficiently pierce and cut through large diameter structures such as conductor pipes. The other jaw includes a substantially concave portion that cradles the work piece. The shears include various features that facilitate subsea or above-water use of the shears to cut portions of a decommissioned oil platform.

Des cisailles de traitement de matières à haut rendement présentent des mâchoires reliées de manière pivotante et un vérin hydraulique s'étendant de façon fonctionnelle entre les mâchoires pour ouvrir et fermer celles-ci. L'une des mâchoires porte une lame de coupe munie d'une arête de coupe sensiblement convexe. Les surfaces de la lame de coupe se croisent à un angle aigu pour définir l'arête de coupe. La forme de la lame de coupe lui permet de percer et de couper efficacement des structures de diamètre important, telles que des tubes conducteurs. L'autre mâchoire comporte une partie sensiblement concave qui entretoise la pièce à travailler. Diverses caractéristiques des cisailles facilitent leur utilisation, sous-marine ou non, pour couper des parties d'une plate-forme pétrolière désaffectée.

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