Patent ID: 8720315
Filing Date: 2014-05-13
Classification: F41H

Abstract:
1. A combustion gas piston type movable guiding tube netting device, comprising: a capture net ( 8 ), a traction head ( 6 ), a guiding tube ( 7 ), 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 ( 5 - 1 ) and a power box ( 5 - 2 ), the combustion gas generator ( 1 ) includes a chamber ( 1 - 1 ), a groove ( 1 - 2 ), an airway ( 1 - 3 ) and a gas channel ( 10 ); wherein the chamber ( 1 - 1 ) inside the combustion gas generator ( 1 ) has a cylindrical shape, and the piston ( 2 ) and the main gunpowder ( 5 ) are placed within the chamber ( 1 - 1 ); a top of the piston ( 2 ) contacts a triangular lug on the base of the guiding tube ( 7 ); a lower end of the combustion gas generator ( 1 ) is threadly connected to the igniter ( 3 ); the grooves ( 1 - 2 ), the number of which is four to six and the shape of which is semi-cylindrical, are uniformly distributed in a surface of an upper end of the combustion gas generator ( 1 ); the shape and number of the airways ( 1 - 3 ) match the shape and number of the grooves ( 1 - 2 ), respectively; a plurality of grooves ( 1 - 2 ) and a plurality of airways ( 1 - 3 ) are interlaced and interconnected; the gas channel ( 10 ) is communicated with the chamber ( 1 - 1 ) and the airway ( 1 - 3 ) at both ends thereof, and the number of the gas channels ( 10 ) is the same as the number of the airways ( 1 - 3 ); a bottom portion of the guiding tube ( 7 ) has a rectangle and is placed in the groove ( 1 - 2 ); the cover plate ( 9 ) is closely fitted with the upper end of the combustion gas generator ( 1 ) and the bottom portion of the guiding tube ( 7 ), and the sealing rings ( 4 ) are provided at an interface between the cover plate ( 9 ) and the upper end of the combustion gas generator ( 1 ), and at an interface between the cover plate ( 9 ) and the bottom portion of the guiding tube ( 7 ); the cover plate ( 9 ) is fixed on the upper end of the combustion gas generator ( 1 ) with screws ( 11 ); the traction head ( 6 ) is placed in the internal bottom end of the guiding tube ( 7 ), and is fixed on one corner of the capture net ( 8 ) at another end; the gas generated by the combustion gas generator (