Combustion gas piston type movable guiding tube netting device

A combustion gas piston type movable guiding tube netting device, comprising:

• a capture net (8), a traction head (6), a guiding tube (7), characterized in that the device further comprising:
• an igniter (3), a main gunpowder (5), a sealing ring (4), a combustion gas generator (1), a piston (2) and a cover plate (9);
• wherein the main gunpowder (5) includes black powders and a power box, the combustion gas generator (1) includes a chamber, a groove, an airway and a gas channel (10);
• wherein the chamber inside the combustion gas generator (1) has a cylindrical shape, and the piston (2) and the main gunpowder (5) are placed within the chamber;
• the top of the piston (2) contacts a triangular lug on the base of the guiding tube (7);
• the lower end of the combustion gas generator (1) is threadly connected to the igniter (3);
• the grooves, that the number of which is four to six and the shape of which is semi-cylindrical, are uniformly distributed in the surface of the upper end of the combustion gas generator (1);
• the shape and number of the airways matches the shape and number of the grooves, respectively;
• a plurality of grooves and a plurality of airways are alternatively distributed and interconnected;
• the gas channel (10) is communicated with the chamber and the airway at both ends thereof, and the number of thereof is the same as the number of the airway;
• the bottom of the guiding tube (7) has a ‘⊥’ shape and is placed in the groove;
• the cover plate (9) is closely fitted with the upper end of the combustion gas generator (1) and the bottom of the guiding tube (7) with the sealing ring (4) in its interface surface;
• the cover plate (9) is fixed on the upper end of the combustion gas generator (1) with screws;
• the traction head (6) is placed in the internal bottom end of the guiding tube (7) and is pinned, and is fixed on one corner of the capture net (8) at another end;
• the gas generated by the combustion gas generator (1) is the power source of the netting device to push the piston (2) to move so that the guiding tube (7) is rotated 40°-45°, and also to push the traction head (6) to burst out of the guiding tube (7) so that the capture net (8) is smoothly opened;
• the guiding tube (7) is vertically retracted in the initial state of the netting device;
• during operating, the ignition signal detonates the igniter (3), the resulting combustion gas pushes the piston (2) to move upward to push the triangle lug on the base of the guiding tube (7) so that the whole guiding tube (7) is rotated;
• after the piston (2) is moved a distance of 20-40 mm, the gas channel (10) is opened, so that the gas comes into the guiding tube (7) and pushes the traction head (6) to move at high speed and fly out of the guiding tube (7), so that the traction head (6) drives the capture net (8) to open.