| 摘要 |
<p>The present invention concerns a device (1) to prevent and/or interrupt gas leaks and comprising: - A conduit (Α', 4' ' ) for the circulation of a gas and; - Valve means (3) comprising opening/closing means (11, 12, 13, 15, 16; 211, 212), mobile between an open position, to allow the circulation of the gas in the conduit (4', 4''), and a close position, to interrupt said circulation in the conduit (4', 4' ' ); In accordance with the invention, said conduit (4', 4'') forms an internal channel (300) which is in fluid communication with the valve means (3) in such a way as to allow the flow of the gas when said opening/closing means are in open position, and wherein an external chamber (600) is further foreseen, which wraps the internal conduit (300) for at least a part of its entire length, the external chamber being placed at a pre-determined control pressure value (P), said external chamber (600) being in fluid communication with the opening/closing means (11, 12, 13, 15, 16) in such a way as to assume an open/close position on the basis of a control pressure value (P) acting on them.</p> |
