| 摘要 |
<p>Device for protecting a fluid flow duct with elements for interrupting delivery to prevent leaks along the flow duct having the particularity of comprising an intake chamber (2) located upstream of a fluid flow duct (6) to be protected and a delivery chamber (11) located downstream of the fluid flow duct (6). An auxiliary connection duct (15) runs between the intake chamber (2) and the delivery chamber (11). A shutter (20) is located in the intake chamber (2) and controls the ports (21,22) for connection to the fluid flow duct (6) and to the auxiliary duct (15). The shutter (20) is normally closed on said port (21) for connection to the fluid flow duct (6) and opens when a load loss occurs in the delivery chamber (11). There are also one-way valve elements (30,32) located at the ports (31,33) for the connection of the fluid flow duct (6) and of the auxiliary duct (15) to the delivery chamber (11) and suitable to allow the flow of fluids from the ducts (6,15) to the delivery chamber (11) but not vice versa. <IMAGE></p> |
