| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology capable of suppressing a measurement error for a weighing device of powder and granular materials, used with an air force transporting device.SOLUTION: This weighing device 4 comprises: a storage tank 41; measurement means for measuring powder and granular materials in the storage tank 41; and a suction nozzle 43. One end of the suction nozzle 43 is a suction port 431 placed inside of the storage tank 41, and the other end is connected to a transportation pipe 5 for suction transportation. The storage tank 41 comprises: a main storage part 71 in which powder and granular materials are temporarily stored; a sub storage part 72 in which powder and granular materials are secondarily stored; and a connection port 74 which connects between the main storage part 71 and the sub storage part 72. Powder and granular materials are supplied from the main storage part 71 through the connection port 74 to the sub storage part 72 by gravity. A part of the suction nozzle 43 including the suction port 431 is placed inside of the sub storage part 72 while it does not come into contact with the storage tank 41. As a result, a contact area between the suction nozzle 43, and powder and granular materials is minimized at the time of measurement of powder and granular materials, and a measurement error is suppressed.SELECTED DRAWING: Figure 3 |
