| 摘要 |
PURPOSE:To enhance the effect of breaking a bridge with an air jet stream by supplying an air jet stream from an air jet nozzle for breaking a bridge of granular powder accompanied by air and granular powder supplied from other portions through a supply path. CONSTITUTION:In case of opening a discharge port gate 8 of a hopper 7 to feed out the stored granular powder 9 to a discharge chute pipe 11, if granular powder 9 builds a bridge 9a not to be discharged, an air jet stream 13 is sprayed from an air jet nozzle 12 to the bridge 9a to be broken. At this time, the air jet stream 13 is forced to pass at high speed in one end portion of a pipe 10 connecting the side wall portion of the hopper 7 to the side wall portion of the discharge chute pipe 11, so that air and granular powder 9 in the pipe 10, the discharge chute pipe 11, and in the lower portion of the hopper 7 are sucked in the air jet stream 13 to be accompanied therewith. Thus, the apparent amount of air is increased to reliably break the bridge 9A with strong force. |
