MECHANICAL-HYDRAULIC GEAR FOR IMPLEMENTATION OF UPWARD BOREHOLES Russian patent published in 2009 - IPC E21D3/00 E21C25/62 

FIELD: mining engineering.

SUBSTANCE: invention relates to mining engineering, particularly to facilities of mechanisation of unmanned coal extraction, for instance in conditions of hydromine. Mechanical-hydraulic gear for implementation of upward borehole contains bearer frame, executive device in the form of two counter-rotating cutting crowns and driving hydraulic actuator, water is used in the capacity of energy carrier. Gear is outfitted by drilling-anchorage device, control system, allowing at least two reversible spool-type distributor with moving element, and oil-station jetting hydraulic circuit. Drilling-anchorage device is installed by longitudinal axis of bearer frame with orientation of its boring tool along-track direction of gear and connection of its anchor mechanism to jetting hydraulic circuit of oil-station. And to the control system there are introduced two hydrocontrolled sliding shutter with retractable rods, operating in antiphase, one of which is connected to water inlet hydraulic circuit to driving hydraulic actuators and cutting crowns of operating member, and other - into water inlet hydraulic circuit to rotator of boring tool of drilling-anchorage device. Furthermore, one distributor is fixed on bearer frame of gear and interlocked simultaneously to retractable rods of both sliding shutters and hydraulically- to feeding hydraulic actuator of drilling-anchorage device, and the second is fixed on rod of its hydraulic actuator with ability of introduction of its moving elements into contact alternately with its body or with bearer frame of gear and hydraulically connected to controlling cavities of sliding shutters and wedged hydraulic actuator of anchor mechanism of drilling-anchorage device.

EFFECT: there are reduced mass of gear and labour-intensiveness of its maintenance.

5 dwg