SET FOR SCREW DRILL COAL MINING Russian patent published in 1994 - IPC

FIELD: mining industry. SUBSTANCE: set for screw drill mining includes two screw drill machines 1 and 2 with drill 3 and stowage 4 screw flights connected with braces 5. Rigid beam 8 with guide 9 coupled with braces 5 with the aid of slider in the form of rotary bushing 10 is placed between screw flights. Set is provided with mechanism for stabilization of movement which is manufactured in the form of follow-up control valve 3 with rod mounted on braces 5 for longitudinal movement. Rod is coupled to rotary bushing. Correction mechanism is manufactured in the form of eccentric cam interacting with control valve 3. Mechanism of stepping turn of cam is manufactured in the form of ratchet wheel mounted on one axle with cam and lever with pawl linked to it and plungers for interaction with lever. Inlet of control valve 3 is connected with the help of reversible control valve with pump and its outlet is connected with support hydraulic jack. In process of drilling deflection and moment emerge turning screw flight. Deflections are arrested with rotary bushing and support hydraulic jack which is controlled with control valve 3 together with hydraulic correction mechanisms. With angle deflection of flight rod connected with rotary bushing displaces and redistributes flow of fluid from pump to proper space of hydraulic jack. EFFECT: enhanced efficiency of mining thanks to automatic stabilization of positions of screw flights and drill bits and to capability of correction of their displacements in seam. 2 cl, 2 dwg