| 摘要 |
PURPOSE:In an injection circuit of such as a high pressure turbine pump for water, to reduce the power consumption by performing the reverse open/close operation of a solenoid valve at the reducing orifice exist of a discharge piping and the solenoid valve of the injection piping. CONSTITUTION:In an injection circuit of a high pressure pump 1, a solenoid valve 2 is provided in the discharge piping 7 while the open/close operation of said solenoid valve 2 and the solenoid valve 3 of the injection piping 4 are made reverse. When injecting the water through an injection nozzle 5, the solenoid valve 3 is opened while at the same time the solenoid valve 2 is closed to eliminate the normal discharge water. While when the water is not injected through the injection nozzle 5, the solenoid valve 3 will close and at the same time the solenoid valve 2 will open to discharge the high pressure water through the discharge pipe 7. Consequently the breakage of the high pressure pump 1 is prevented while simultaneously the power consumption is reduced. |
