| 摘要 |
FIELD: mining industry; civil engineering. ^ SUBSTANCE: invention can be used in rippers of gas-dynamic action for loosening firm and frozen soils. Proposed gas-dynamic ripper has hollow rod housing installed coaxially and connected mechanically with housing of screw head with exhaust holes, vertically installed gui9de shaft for fastening on frame of base machine on which bracket is installed for longitudinal displacement with fitted-on bushings for connection with shaft, cocks to control delivery of compressed gas and pipelines to deliver compressed gas from supply source to gas distributor made in form of pneumatic accumulator with hollow shank secured on hollow rod housing, and ring housing with three ring channels in its wall rigidly connected with bracket, coaxially installed inner and outer supply pipes, exhaust control valve installed in screw head installed for limited axial displacement inside housing of screw head and interacting with seat for communicating ring clearance between seat and inner supply pipe with exhaust holes in housing of screw head are provided with control space and inner supply pipe arranged in control space, spring to press valve to seat, and piston for forced displacement of gas installed inside hollow rod housing for limited axial displacement. One of ring channels in wall of ring housing communicates through cock with pipeline to deliver compressed gas from supply source, and it communicates through radial channels made in ring housing through inner supply pipe with valve control space to communicate ring clearance between seat and inner supply pipe with exhaust holes in screw head housing. Space of pneumatic accumulator communicates with atmosphere and with supply source through compressed gas supply control cock, pipelines, ring channel with radial channels in wall of ring housing, radial channels and inner space in shank. Ring clearance between seat and inner supply pipe communicates with supply source through compressed gas supply cock, pipelines, ring channel with radial channels in wall of ring housing and outer supply pipe. Housing of pneumatic accumulator is made in form of hollow cylinder with lower and upper flanged parts provided with concentric holes for coaxial fastening of upper flanged part of pneumatic accumulator to flanged part of hollow shank, for coaxial fastening of lower flanged part of pneumatic accumulator to flanged part of hollow rod housing made at a distance from its upper end face equal to height of housing of pneumatic accumulator. Seat installed on upper end face of hollow rod housing for limiting upwards movement of forced gas displacement piston. Spring for limiting downward movement of forced gas displacement piston is installed on upper end face of seat to limit upward movement exhaust control valve. Outer supply pipe is installed in central hole of forced gas displacement piston. ^ EFFECT: increased efficiency. ^ 3 dwg |
