Shut-off valve

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

Patent

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Details

F16K 3/20 (2006.01) F16K 3/316 (2006.01)

Patent

CA 2334214

The invention relates to a shut-off valve (17) for shutting off large-diameter ducts. Said valve comprises a housing (1), a shut-off element (19) with a ring (3) and a shut-off disk (2) which are joined together, as well as two housing seats (21) assigned to the shut-off element (19). The aim of the invention is to improve the shut-off disk such that with reduced effort a uniform sealing action is obtained which is independent of the peripheral position at the shut- off element. To this end the invention provides for the two housing seats (21) of the housing (1) to have no contact with the ring (3) or shut-off disk (2) in any operating position, for the distance between the two housing seats (21) and the ring (3) or shut-off disk (2) to remain substantially constant and for it to be possible for an annular gap present between the two housing seats (21) and the ring (3) or the shut-off disk (2) to be filled with an expandable seal (5) which is arranged especially in the housing seats (21).

L'invention concerne une vanne d'arrêt (17) utilisée pour obturer des conduites de grande dimension. Cette vanne comporte un corps (1), un organe d'arrêt (19) pourvu d'un anneau (3) et d'un disque d'arrêt (2) qui sont assemblés, ainsi que deux sièges de corps (21) associés à l'organe d'arrêt (19). Cette vanne d'arrêt doit être améliorée de sorte que l'obturation se fasse, de façon simple, avec une étanchéité uniforme, indépendante de la position périphérique au niveau de l'organe d'arrêt. Il est proposé que les deux sièges (21) du corps (1) ne soient en contact avec l'anneau (3) ou le disque d'arrêt (2) dans aucun état de fonctionnement de la vanne, que la distance entre les deux sièges de corps (21) et l'anneau (3) ou le disque d'arrêt (2) reste sensiblement constante, et également que les fentes annulaires se trouvant respectivement entre les deux sièges de corps (21) et l'anneau (3) ou le disque d'arrêt (2) puissent être remplies par des joints expansibles (5) disposés en particulier dans les sièges de corps (21).

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