Water deflector for water-gas plumes from underwater explosions

F - Mech Eng,Light,Heat,Weapons – 42 – D

Patent

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Details

F42D 5/045 (2006.01) A22C 9/00 (2006.01)

Patent

CA 2256445

An explosive blast shield has two connected parts, a foraminous inner shield (10) surrounded by an impervious outer shield (20). The inner shield (10) has an open lower end to absorb an explosive blast of water and gas, as from an underwater explosion. The inner shield (10), whose area is about 20 % holes (11), blocks most liquid from entering the space (30) between the two shields, but gas passes readily through the holes (11) to equalize the pressure across the inner shield (10). The shield may include a chimney (40) at the upper end for release of gas and a hold-down to prevent the shield from being blown upward.

La présente invention concerne un bouclier anti-souffle pour explosions, lequel bouclier est constitué de deux parties assemblées, à savoir un écran intérieur perforé (10) entouré d'un écran externe (20) étanche. En son extrémité inférieure, l'écran intérieur (10) présente une ouverture destinée à absorber le souffle gaz-eau d'une explosion telle qu'une explosion subaquatique. Des perforations (11) occupant 10 % de la surface de l'écran intérieur (10), celui-ci empêche la majeure partie du liquide de pénétrer entre les deux écrans, mais laisse le gaz traverser facilement les perforations, (11) rééquilibrant ainsi la pression de part et d'autre de l'écran interne (10). En son extrémité supérieure, le bouclier peut également comporter, non seulement une cheminée permettant le dégagement des gaz, mais aussi un dispositif de retenue empêchant le bouclier de remonter sous l'effet du souffle.

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