| 摘要 |
PURPOSE:To perform exact metering by making the size in the axial direction of the vane of an impeller contained in a metering chamber provided with an inflow port and an outflow port approximately the same as the opening size of the inflow port in the axial direction of the impeller. CONSTITUTION:The body of a constant volume stop valve has a socket 41 built therein with a flow rate regulator 40 in the rear part and has a partition wall 13 in the front part which is partitioned internally to the right and left parts with the wall 13. One chamber of the two chambers which are partitioned from each other has a discharge port 42, and is disposed therein with a metering chamber 9 contg. an impeller 15. The size of the impeller 15 in the axial direction of the vane is made approximately the same as the size of an inflow port 10 in the axial direction of the impeller 15 so that the rotating locus of the vane of the impeller overlaps on the projected area of the port 10. Since the number of revolutions of the imepeller coincides exactly with the flow rate of the water that rotates the imepller as mentioned above, the exact metering is made possible. |
