FIRM AND FROZEN GROUND DISINTEGRATION DEVICE Russian patent published in 2006 - IPC E02F5/30 

FIELD: mining and building, particularly devices to apply gas-dynamic action to ground to loosen thereof during building work performing.

SUBSTANCE: device comprises load-bearing frame with vertical guiding shafts and having orifice for gas-dynamic annular blade passage through the frame. The gas-dynamic annular blade is coaxial to central gas-dynamic ripper. The ripper comprises hollow rod body kinematically connected with discharge bush having exhaust orifices and screw tip body kinematically connected with discharge bush and coaxial thereto. Working chamber with hollow shank of central gas-dynamic ripper is coaxially fastened to rod body. The hollow shank is kinematically linked to drive mechanism and may rotate in opposite direction when gas-dynamic annular blade shank is installed in stepped orifice of stepped body of gas-dynamic unit connected with power source through valves to control pressurized gas supply and through compressed gas supply pipelines. The hollow shank is also connected with vertical guiding shafts by holders and sliding bushes. The gas-dynamic annular blade is composed of separate segmented parts having flange areas and cutting blades kinematically connected with tubular rod bodies, coaxially arranged between them along concentric circuit in top-down direction, with discharge bushes having exhaust orifices and with cutting tip bodies. Gas-dynamic annular blade shank is provided with annular groove, radial channels, longitudinal annular channel to supply compressed gas to common annular chamber of gas-dynamic annular blade defined by lower and upper flanges connected one to another by common hub created at gas-dynamic annular blade shank, and connection pipe installed on upper and lower flanges of gas-dynamic annular blade shank. Central orifice for rotary central gas-dynamic ripper shank installation is formed in the hub. Lower flange has concentric orifices for upper parts of tubular rod bodies of gas-dynamic annular blade rippers receiving. One radial channel created in stepped body wall having larger diameter is communicated with pressurized gas supply pipeline through compressed gas supply control valve. The radial channel is communicated with common annular chamber of gas-dynamic annular blade through annular groove, radial channels and longitudinal annular channel. The common annular chamber of gas-dynamic annular blade is connected with annular gaps defined between rod bodies of gas-dynamic annular blade rippers and supply bushes installed along longitudinal axis in common annular chamber of gas-dynamic annular blade, in cavities formed in rod bodies of gas-dynamic annular blade rippers, in valves and valve control cavities. Another radial channel formed in stepped body wall having larger diameter is communicated with compressed gas supply pipeline through compressed gas supply control valve and with longitudinal concentric channels of gas-dynamic annular blade shank through annular grove. Above radial channel is connected with valve control cavities through jets linked to longitudinal channels and supply pipes and through supply pipes to communicate annular gaps between rod bodies and supply pipes with exhaust orifices in discharge bushes of gas-dynamic annular blade rippers. Ground to be loosened is subjected to simultaneous action of five gas pulses generated by four gas-dynamic annular blade rippers and by central gas-dynamic ripper.

EFFECT: increased capacity and uniformity of ground cutting into fractions due to gas pulse application to the ground.

3 cl, 11 dwg