| 摘要 |
PURPOSE:To attain high-speed operation by forming the concentric inside diameter portion changing in stages on a tube, and providing a plate spring having a hole portion, which is adapted to support a valve for blocking up the inside diameter portion. CONSTITUTION:A valve 2 is positioned in a hole 6 having a large inside diameter in such a manner as to block up a hole 5 having a small inside diameter. A pressing plate 3 having a hole 7 is positioned in such a manner as to support the valve 2, and fixed to the side wall of the large inside diameter hole 6. The large inside diameter hole 6 is provided with a pass groove 4 disposed on a part of a portion where the valve 2 contacts towards the pressing plate 3. The flow rate is determined mainly by the width and depth of the pass groove 4 and the wall thickness and material quality of the pressing plate 3. In the case where pressure is produced in the reverse direction, not only the pressure of a fluid to the valve 2 but also the spring action of the pressing plate 3 is superposed to quickly restore to the closing state of the valve. |
