Patent ID: 9702553
Date: 2017-07-11
CPC Classifications: F23G

Claim:
1. A waste material supply device comprising: a hopper into which a waste material is supplied; a first rubbish supply apparatus having an inlet connected to an outlet of the hopper and pushers configured to push out the waste material in a horizontal direction; a connecting chute having an upper portion connected to an outlet of the first rubbish supply apparatus to form a space extending upward and downward; a second rubbish supply apparatus having an inlet connected to a lower portion of the connecting chute, and a screw configured to convey the waste material in an axial direction according to rotation about an axis thereof; a level sensor installed at the connecting chute and configured to detect a sediment amount of the waste material accumulated in the connecting chute; and a control device configured to control each of the pushers according to a detection level of the level sensor, wherein the first rubbish supply apparatus has a plurality of pushers in a widthwise direction, and each of the pushers is capable of being individually manipulated, the control device controls the plurality of pushers to advance and retreat at different timings and to alternate repeatedly between advancing and retreating when the detection level of the level sensor arrives at a preset lower limit value, and to retreat when the detection level of the level sensor arrives at a preset upper limit value, when the detection level of the level sensor is between the preset upper limit value and the preset lower limit value, the number of revolutions of the screw of the second rubbish supply apparatus is adjusted such that the number of revolutions of the screw is reduced when the diminution rate of the detection level of the level sensor exceeds a predetermined diminution rate and the number of revolutions of the screw is increased when the diminution rate of the detection level of the level sensor is lower than the predetermined diminution rate, and the pushers are not controlled to advance at the same time and are not controlled to retreat at the same time.