| 摘要 |
PURPOSE:To reduce the load which a high pressure fluid supply source must bear as well as provide good economy for supply of fluid by changing automatically the amount of injection of high pressure fluid and its rate of discharge in the discharge passage. CONSTITUTION:Main nozzle 1 for injection of high pressure fluid is connected straight with a straight pipe 2 for intermediate injection either directly or through a protector pipe 3 having a bore larger than the bore of the main nozzle and smaller than that of the straight pipe 2. The terminating end of a gas suction branch pipe 4 opens at the side wall of the starting end of said straight pipe 2, and discharge pipe 5 is connected straight with the terminating end of this straight pipe 2. The stream expanding point of the fluid to be injected from the main nozzle 1 differs according to the degree of vacuum of the abovementioned branch pipe side, and connecting this pipe 4 to the vacuum tank side will provide a constant vacuum at all times. |
