Holder with v-knife blade for bi-directional rupture disc...

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 17/40 (2006.01)

Patent

CA 2594805

This invention relates to a cylindrical holder member for a bi-directional bulged rupture disc. The support body of the holder has a rim that supports the rupture disc with the concave surface of the disc facing the holder. The support body is provided with a unitary one-piece, centrally creased cutting element that is of generally V-shaped configuration in plan view. The cutting element has a pair of elongated converging leg components with each leg component being connected to and supported by the interior wall surface of the holder body, with each leg component having an arcuate cutting edge. The cutting edges of the leg components merge at the crease in the cutting element to define a central cutting edge peak section. The cutting element is positioned in the holder with the cutting edge peak section extending beyond the rim of the support body into the concave area of the disc. The V-shaped cutting element functions to provide for a fuller and more rapid opening of the disc upon reversal and engagement with the cutting element as compared with prior reverse buckling disc three-knife blade cutter units. The invention has especial utility in food, beverage, and pharmaceutical applications requiring sanitary pressure relief rupture disc structure.

L'invention concerne un élément de support cylindrique pour un disque bombé à rupture bidirectionnelle. Le corps de maintien du support comporte une couronne qui maintient le disque de rupture avec la face concave du disque opposée au support. Le corps de maintien est doté d'une pièce unitaire, élément de coupe central adoptant normalement une configuration en V selon une vue du dessus. L'élément de coupe comporte une paire de composants de jambe convergents allongés, chaque composant de jambe étant relié et maintenu par la surface de paroi interne du corps de support, chaque élément de jambe présentant un bord de coupe arqué. Les bords de coupe des composants de jambe fusionnent au niveau du pli de l'élément de coupe afin de définir une section de pic de bord de coupe centrale. L'élément de coupe est placé dans le support, la section de pic de bord de coupe s'étendant au-delà de la couronne du corps de maintien dans la zone concave du disque. L'élément de coupe en V sert à ménager une ouverture plus rapide et pleine du disque après inversion et insertion avec l'élément de coupe par rapport aux unités de coupe à trois lames d'un disque de gauchissement inverse conventionnelles. L'invention trouve une application dans les secteurs alimentaire, des boissons et pharmaceutique nécessitant une structure de disque à rupture limitant la pression à usage sanitaire.

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