| 摘要 |
PURPOSE:To prevent dust from flowing to the downstream side of an injection nozzle without any increase in pressure loss by providing a columnar body on the upstream side of the injection nozzle and arranging dust pool spaces which receive dust from nearby the upstream side on both outside parts. CONSTITUTION:The full-index flowmeter is constituted by providing a couple of control nozzles 6a and 6b for flowing direction variation and a sensor 10 for flow rate measurement on the down-stream side of the injection nozzle 3, and the columnar body 12 is provided on the upstream side of the injection nozzle 3. This columnar body 12 is wide enough to lap entirely in the front view of the injection nozzle 3. Further, the dust pool spaces 31a and 31b for receiving the dust from the upstream side of the columnar body 12 are arranged outside on both sides of the upstream flow passage 30 of the columnar body 12. Consequently, the dust is prevented from flowing in without any increase in pressure loss. |
