Anti-cavitation system in pipelines which avoids that the fluid reaches its vapour pressure at the output of a given contraction using a device that connects the output section of the contraction with its downstream pressure

摘要

A anticavitation system that has a pipeline piece (1) that has a contraction (3), as an example a valve. Upstream of the contraction (3) the fluid moves in a direction (2) with a P1, and downstream of the contraction (3) with a pressure P2. To avoid that the fluid pressure reached the Pv, exiting the contraction (3), the system has cavities and holes (4) located downstream of the contraction, where the pressure is stable and reaches a value P2. The system has a second set of cavities (5) located just outside the contraction (3). Using a connection media (6) the system feeds back the stable prssure P2, to the area outside the contraction (3) where the pressure reaches Pv and can produce the undesirable cavitation. For this, as it feeds back the pressure P2 using the connection media (6) to the cavity (5), the pressure exiting the contraction (3) reaches a value P3 that is higher than Pv. The connection media (6) can have a chamber-chamber (9) that has a surrounding (7) and the external wall of the pipeline (1)