TUNNELING COMPLEX Russian patent published in 1995 - IPC

FIELD: construction. SUBSTANCE: tunneling complex includes driving shield with rock cutting working tool, shield hydraulic jacks, process platforms, block layer and shield belt conveyer having frame, head and tail sections with drums and idlers. Shield belt conveyer is installed for motion in longitudinal direction over guide, and tail drum of belt conveyer is installed on removable eccentric supports secured to belt conveyer frame. Head section is located in guides of frame of shield conveyer for motion along axis and connected with frame of shield belt conveyer by means of hydraulic cylinders. Drive of head section is made in form of hydraulic motors connected with drive drum. Head ends of rams of head section are communicated through reducing valve, check valves and throttles with hydraulic motors of drive drum of belt conveyer, and through safety valves having proportional electric control to return line. Installed on frame of belt conveyer are position pickups of belt electrically connected with safety valves provided with proportional control. EFFECT: higher efficiency of complex due to improved reliability of conveyer operation. 2 cl, 7 dwg