PULSED LIQUID JET GENERATION METHOD AND DEVICE Russian patent published in 2007 - IPC E21C45/00 E21C45/04 

FIELD: mineral mining and ground erosion, particularly pulsed liquid monitors and high-velocity jet devices.

SUBSTANCE: method involves twisting liquid jet under pressure to create at least two oppositely directed vortexes defined by swirled liquid jets with equal supply pressures having peripheries communicated with cavity having controllable elasticity; injecting additional high-pressure liquid in jet nozzle; mixing additional liquid with variable-flow swirled liquid jet. Device for above method realization comprises body 1 with vortex chamber 5, jet twisting channels 3, outlet nozzle 10, pressure pipeline 2 communicated with twisting channels 3, as well as central body installed in vortex chamber 5 so that the central body is spaced from vortex chamber 5 and space 7 is created in-between. The central body 8 has cavity with controllable elasticity 6 communicated with vortex chamber 5. The cavity is connected with outlet nozzle through said space 7. Twisting channels 3 are formed in at least two vortex chamber 5 cross-sectional planes and provide jet swirling in opposite twisting directions. The twisting channels are communicated with pressure pipeline 2. Device also comprises jet nozzle 4 adapted to create high-velocity constant-flow jet.

EFFECT: increased pulsed jet efficiency.

7 cl, 4 dwg