Device for actuating a conduit gate-valve assembly

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

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F16K 3/02 (2006.01) F16K 27/04 (2006.01) F16K 31/52 (2006.01)

Patent

CA 2169918

Device for actuating a double guide tube slide with a master slide (10) and associated therewith a by-pass slide (11), the slide rods (21, 20) of which are coupled with one another via a double-armed lever (12) pivotally mounted on the slide housing (35) in such a way that, upon movement of one slide into the closed position, the other slide is movable into its open position and vice versa. The double-armed lever (12) has a stationary drag bearing (13). Formed on the two arms (14, 15) of the double-armed lever (12) are respectively a slide guidance means (16, 17) for receiving an entrainment means (18, 19) provided on the associated slide rod (20, 21). The slide guidance means (16, 17) are so formed and co-ordinated with one another that, in each relative position of master and by-pass slides, i.e. in any optional pivotal position of the double-armed lever (12), a substantially constant pressure differential is maintained over the entire slide arrangement (10, 11).

L'invention concerne un dispositif d'actionnement d'un tiroir double pour tube de conduite comprenant un tiroir maître (10) et un tiroir de dérivation (11) dont les tiges (21, 20) sont accouplées l'une à l'autre par l'intermédiaire d'un levier (12) à deux bras monté pivotant sur le corps du tiroir (35), de manière à ce que lorsqu'un des tiroirs est déplacé en position de fermeture, l'autre tiroir puisse être déplacé en position d'ouverture et inversement. Le levier à deux bras (12) comporte un palier pivotant (13) fixe. Chacun des deux bras (14, 15) du levier (12) comporte un guide de coulisse (16, 17) pour recevoir un entraîneur (18, 19) prévu sur la tige de tiroir (20, 21) associée. Les guides de coulisse (16, 17) sont adaptés l'un à l'autre et se présentent de manière à ce que dans chaque position relative du tiroir maître et du tiroir de dérivation, c.-à-d. dans chaque position de pivotement du levier (12) à deux bras, une pression différentielle sensiblement constante soit maintenue sur l'ensemble du système de tiroirs (10, 11).

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