DEVICE FOR CONTROL OF PLOW UNIT FOR FACE WITH PROPS Russian patent published in 1996 - IPC

FIELD: mining industry; applicable in system of electrohydraulic control of face support. SUBSTANCE: device for control of plow unit for face with props provides for availability in pressure pipeline between pump unit and hydraulic cylinder of check valve controlled depending on pump unit pressure by means of electronic control unit and two-way two-position distributor with electromagnetic control. Posts of plow unit are connected with conveyer by means of rods. Controlled check valve is installed in pressure line between valve unit and reducing valve. Electronic control unit may be made of OR circuit with four inputs and successively connected voltage source, switch, distributor with emergency disconnection button and magnet control instrument. The magnet control instrument may be made of connected switch, AND circuit and accumulating stage. Bypass main pipeline with valve may be included parallel to check valve. EFFECT: higher efficiency. 4 cl, 2 dwg