ORE CHUTE GATE. Russian patent published in 2009 - IPC E21F13/04 B65G65/30 

FIELD: mining..

SUBSTANCE: invention refers to auxiliary transport equipment, particularly to gates and is designed mainly for shutting off outlet apertures of ore chutes in mines; it can be also implemented for outlet of lump loads from hoppers. The ore chute gate contains two cylinder bottoms installed under an outlet port secured on two cranks; the said bottoms are designed to rotate in vertical plane into opposite directions against horizontal axes. The axes are located on outer sides of vertical walls of a sleeve and parallel to them. The cylinder bottoms of cranks are arranged overhung with the length of arc corresponding to right angle; free ends of bottoms are directed inside the sleeve. Kinematical connection between cranks is made in form of additional cranks secured on axes. Free ends of cranks are connected with rods of two double-piston-rod actuating cylinders oriented horizontally and assembled with gaps relative to two other walls of the sleeve. In their initial position at an open gate the cranks are oriented horizontally, while the additional cranks form the angle of 45 degrees with the walls of the sleeve; the additional cranks are designed to interact after turn into the direction of the sleeve at the angle of 90 degrees with stops secured on the sleeve. A shield with two sloping surfaces is installed inside the sleeve at the level of axes and parallel to them; the said shield overlaps the end flanges of the cylinder bottoms in plane when the gate is closed and is oriented along the axis of sleeve symmetry. Free ends of the shield are arranged in slots of the side walls of the sleeve and are designed to set off the shield in vertical and horizontal planes. The shield is spring loaded towards brackets of the sleeve by means of a compression spring. At the ends of the shield there are installed unbalance vibrators; their axes are parallel to a lengthwise axis of the shield. Dimensions of the gate are chosen considering the following ratio R=0.5B+a, r<0.355[0.5(B-b)+a-c], where R is radius of the crank, m, r is radius of additional crank, m, B is the width of the outlet port of the sleeve, m, a is the distance between the axis and inside surface of the sleeve wall, m, b is total distance between piston rods and piston rods and end walls of the actuating cylinder for final positions of the piston rods, m, c is the height of the piston rod of the actuating cylinder, m. A replaceable component out of wear and shock resistant material is installed on top of the shield with two sloping surfaces.

EFFECT: increased reliability of operation at unloading oversize lumps through outlet port of ore chute, eliminating possibility of jamming of separate lumps of unloaded bulk between cylinder bottoms and supporting them cranks and avoiding doming.

2 cl, 5 dwg