| 摘要 |
<p>Device and method for monitoring and securing a pipeline conveying a pressurized fluid, and corresponding installation. The pipeline (5) comprises on the one hand an inner conduit (8) suitable for being linked to a source of pressurized fluid (R), on the other hand an outer conduit (9), the two conduits delimiting between themselves an intermediate space (10) under a predetermined setpoint depression P0. The monitoring device comprises: a tapping (11) which emerges into the intermediate space; two comparators (17-1,17-2) suitable for comparing the actual pressure of the intermediate space with, respectively, a first predetermined threshold S1 greater than said depression P0 and less than atmospheric pressure, and a second predetermined threshold S2 greater than atmospheric pressure; and means (16) of alarm and/or of controlling a cut off of the feed to the inner conduit, which means are actuated in response to the detection by one and/or the other comparator of the exceeding of the corresponding threshold. Application to the supplying of dangerous fluids such as refrigerant fluids or fuels with possibility of a recuperation system in the event of a leak.</p> |
