| 摘要 |
PURPOSE:To make it possible to reduce the leak of a fluid from a slip joint portion by providing the slip joint on a throat portion. CONSTITUTION:Driving water from a recirculating pump rises a riser tube 11, bursts forth from a nozzle 12, and absorbs surrounding water allowing to be mixed at a throat 13. Thereafter, the pressure of said driving water is restored at a diffuser portion 14, and flows into a lower plenum 8. Here the throat 13 has been divided into two members (13a and 13b) on the way, and a slip joint 18 is provided on their divided portions. And providing the slip joint on the throat portion 13 where the pressure witin a jet pump has not been restored causes the abrupt reduction of the leaked flow rate of the fluid. |
