Linear stroke valve position indicator

Details Linear stroke valve position indicator Linear stroke valve position indicator

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 37/00 (2006.01)

Patent

CA 2242108

The present invention is directed to a valve position indicator for indicating an open or closed position of a valve having a valve stem, the valve position indicator comprising a body adapted to be mounted to a subsea xmas tree structure, a traveling block movably connected to the body by at least one guide bolt, the traveling block including a threaded hole for engaging a threaded extension shaft which is coupled to the valve stem, a rigid tube connected to the body and having first and second open ends, and a coiled spring member having one end connected to the traveling block and the other end extending through the first end of the rigid tube, wherein the extension of the spring member beyond the second end by a predetermined amount provides a visual indication that the valve is in its open or closed position, whereby movement of the traveling block in response to actuation of the valve will push or pull the spring member through the tube to provide the desired visual indication.

Indicateur de position d'une vanne à tige permettant d'établir si cette vanne est ouverte ou fermée. L'indicateur est constitué : d'un corps adapté pour être fixé à une structure d'arbre de Noël sous-marin; d'une moufle mobile reliée de façon amovible au corps par au moins un boulon de guidage, la moufle incluant un trou taraudé pour engager un arbre d'extension fileté qui est couplé à la tige de vanne; d'un tube rigide relié au corps et ayant une première et une seconde extrémités ouvertes; d'un ressort enroulé ayant une extrémité reliée à la moufle mobile et une autre extrémité traversant la première extrémité du tube rigide. L'extension du ressort au-delà de la seconde extrémité dans une mesure prédéterminée fournit une indication visuelle selon laquelle la vanne est en position ouverte ou fermée. Le mouvement de la moufle mobile en réponse à l'activation de la vanne permet de pousser ou de tirer le ressort à travers le tube afin de fournir l'indication visuelle désirée.

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