CHAIN GATE FOR ORE CHUTE Russian patent published in 2009 - IPC E21F13/04 

FIELD: mining; transporting.

SUBSTANCE: chain gate for ore chute consists of two rings assembled under discharge opening one above another and oriented in horizontal planes. The rings are tied between them with vertically oriented round-link chains secured on the rings with their ends and arranged along the whole perimeter of rings. The upper ring is stationary fastened under the discharge opening, while the lower ring is kinematically connected with a drive and is designed to turn in horizontal plane. The lower ring is equipped with rollers arranged around the exterior perimeter of the ring at uniform distances; the rollers are designed to rotate around vertical axes and interact with interior surface of a vertically oriented case of cylinder shape; the case envelopes chains with a gap. The case is secured on a stationary foundation. The lower ring from the lower side is made in form of a rim, in the groove of which a steel wire cable is inserted; the cable with its one end is secured on the rim, while with its another end it is tied with a drum, which is kinematically connected to the drive equipped with a breaking facility. In the initial position, when the gate is open, the cable envelopes the rim along the whole length of its circumference, while a slack from the rim strand of the cable envelopes a deflecting unit from below; the deflecting unit can rotate around its axis equipped with sliders; the sliders are designed to be set off in vertical guides and are equipped with a counterweight; in its initial position the counterweight is placed on the foundation. The axis of the drum is assembled so that it exceeds the lower ring at a value bigger, than vertical displacement of the lower ring, when the discharge opening of ore chute is shut; the distance in horizontal plane of the axis of the drum from the axis of the deflecting unit is chosen from the condition of approximate equality of resultant force of tension of tight and slack strands of the cable enveloping the deflecting unit for the lower ring in the initial position and after its displacement upward at closing the discharge opening with curled chains. The case is made with a vertical slot wherein the cable slack from the rim of the lower block can be inserted with a gap; the height of the slot is accepted not less, than the travel of vertical displacement of the lower ring.

EFFECT: invention facilitates simplifying design of chain gate and increasing reliability of operation at discharging lumps via discharge opening of ore chutes of increased sizes.

3 dwg