Container for launching sonar buoys
A container for housing and launching sonar buoys of class G (sonobuoy) including a casing partitioned into two portions and automatic and simplified valve means to sequentially eject the buoys from the container.
1. Container for housing and launching sonar buoys (sonobuoy), designed to be installed in a launch tube provided with a pneumatic system, said container including:
a cylindrical casing comprising a first portion designed to contain a first sonobuoy of class G, and a second portion designed to contain a second sonobuoy of class G,
said cylindrical casing including:
a proximal end provided with an interface with said pneumatic system of the launch tube,
a watertight intermediate diaphragm for separating said first portion and said second portion of the casing from each other,
a distal end provided with a cap for the watertight front closure of said second portion,
a pneumatic connection between said proximal end and said second portion of the casing,
valve means automatically switchable from a first configuration, in which said pneumatic system is placed in communication with said second portion of the casing by said pneumatic connection, so as to eject said cap and said second buoy from said container, to a second configuration, in which said pneumatic system is placed in communication with said first portion of the casing, so as to eject said first buoy, and
said valve means comprising
a spring closing device provided with watertight sealing means to allow or cut off the communication between said pneumatic connection and said second portion of the casing, and
a diaphragm closing device, to cut off or allow the communication between said pneumatic system and said first portion of the casing, in which said diaphragm closing device is in contact with said first buoy.
2. Container according to claim 1 , wherein said spring closing device comprises a first movable plate provided with said sealing means, and guide and stop means of said plate between a first axial position, in which said sealing means allow the communication between said pneumatic connection and said second portion of the casing so as to eject the second buoy, and a second axial position, in which said sealing means cut off the communication between said pneumatic connection and said second portion of the casing.
3. Container according to claim 1 , wherein said diaphragm closing device comprises a movable diaphragm on one side in contact with said first buoy and a shutter projecting from the opposite side, and a fixed plate carrying an air passage, said diaphragm being movable between a first axial position, in which said shutter is inserted inside said air passage cutting off the communication between said pneumatic system and said first portion of the casing, and a second axial position in which said shutter clears said air passage to eject the first buoy.
4. Container according to claim 1 , wherein said spring closing device comprises a second plate movable with respect to said first movable plate between a first axial position, in which said second plate blocks said first buoy by a thrust of a spring in a first configuration in which said shutter of said diaphragm closing device is inserted inside said air passage of the fixed plate, and a second axial position, in which said second plate allows the displacement of said first buoy in a second configuration in which said shutter clears said air passage to eject the first buoy.
5. Container according to claim 1 , wherein said first portion of said cylindrical casing comprises a plurality of breakable pins for holding said first buoy in said second configuration.
6. Container according to claim 1 , wherein said pneumatic connection comprises at least one duct embedded inside the side wall of the first portion of said container.