POWDER SPRAY DEVICE Russian patent published in 2018 - IPC A62C35/00 

FIELD: technological processes.

SUBSTANCE: invention refers to the technique of spraying powders in air and gas medium. Device for spraying powders includes the cylindrical body which contains powder, the gas generator with the charge of solid fuel, the powder aeration system and the nozzle for efflux of the gas powder mixture. Gas generator, which is made in the form of a separate unit, contains the nozzle and is mounted coaxially with the body, which contains the powder. Charge, which is armored along the lateral surface, is made in the form of sequentially arranged alternate solid and channel disks of the same diameter from solid fuel. Central opening is made in the channel disks, and the system of radially concentric grooves is provided on their end surface from the side, which is opposite to the nozzle of the gas generator. Aeration system of the powder is made in the form of the tube, which is perforated along its lateral surface and positioned along the axis of the body with the powder within its length. One end of the tube is damped, and the other end is connected by the gas pipe to the gas generator nozzle. Perforations on the lateral surface of the tube are tangentially performed in the form of alternating belts with the possibility of creating the swirling in opposite directions flow of combustion products of the gas generator. Diameter of the central opening of the channel disks, the cross-sectional area of the grooves, the total volume of the grooves, the thickness of the continuous and channel disks, the area of the critical section of the nozzle of the gas generator, the total area of the perforations on the lateral surface of the tube and the area of the critical section of the nozzle for the outflow of the gas-powder mixture are determined according to the given ratios.

EFFECT: increased efficiency and reliability of spraying the powder by means of creating the pulsed gas inlet of the combustion products of the gas generator and increased intensification of the powder aeration process are ensured.

1 cl, 4 dwg, 2 tbl