PNEUMATIC PORTION LOADER Russian patent published in 2021 - IPC F42D1/10 

FIELD: mining.

SUBSTANCE: invention relates to the mining industry and can be used for loading holes and boreholes with granular explosives. The pneumatic portion loader has a housing with a dosing chamber and a loading spout. The loader also has a cup placed in the housing under the loading spout coaxially with it with a cylindrical skirt enveloping it and communicated in its lower part with a source of compressed air. The loader includes a shut-off valve located on the cup and mounted with the ability to overlap the loading spout with a spring-loaded rod located in the cavity of the cup. The loader has a cover overlapping the upper open end of the cup with the formation of a working cavity between the cover and the inner surface of the shut-off valve. In the lower part of the cylindrical skirt, an annular groove open from below is made, which connects the cavity of the cup through radial holes formed in the wall of the cup with the cavity of the body in the upper position of the shut-off valve. A circular ring is installed inside the dosing chamber with possibility of longitudinal-axial movement. The circular ring has a drive in the form of rods with stops and made with the formation of an annular gap between the lower part of the circular ring and the bottom of the chamber when the circular ring is lifted.

EFFECT: invention is aimed at increasing loader efficiency by regulating the mass of the portion of the explosive.

1 cl, 4 dwg