CHAIN GATE FOR MILL HOLE Russian patent published in 2014 - IPC E21F13/00 

FIELD: mining.

SUBSTANCE: gate comprises two rings arranged under an outlet hole for release of bulk rock mass, and the rings are arranged one after the other and are aligned in horizontal planes, at the same time the rings are connected to each other by vertically oriented round-linked chains fixed on rings by their free ends and arranged along the entire perimeter of rings. Besides, one of the rings is installed without the possibility of rotation in the horizontal plane, and the second ring is kinematically connected with the drive as capable of rotation in the horizontal plane, on the upper ring along the entire external perimeter there are running rollers with the possibility of their movement along a circular rail, fixed on the circular ledge of the device for release of bulk rock mass. At the same time the ring is equipped with a toothed crown with the possibility of its interaction with a gear, kinematically connected with a rotation drive, and the lower ring is equipped with ledges arranged along its external diameter with the possibility of their interaction with vertically aligned guides of the jacket of cylindrical shape with the possibility for it to cover chains with a clearance. Besides, vertically placed chains in the initial position in their middle part between the upper and lower rings are wound with two additional horizontally oriented chains, which are with one end fixed on the jacket, and by the other end - on one of vertical chains, at the same time additional chains round the vertical chains in opposite directions, and the angle of their coverage of vertical chains is accepted in the range of 180÷220 degrees.

EFFECT: higher efficiency and reliability of gate closure for a mill hole as rock mass is released from it with increased size of pieces.

4 dwg