| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic controller of a valve enabling the installation of a motor-driven valve requiring electrical control even in a space where the installation of the motor-driven valve is impossible without commercial power source equipment. SOLUTION: The motor-driven valve 2 is interposed to a water distribution pipe line 1 and a small hydraulic power generator 5 composed of an inline type hydraulic power generator is interposed to a bypass pipe line 4 bypassing the motor-driven valve 2. Since control power for controlling a control means 15 and the opening / closing drive power of the motor-driven valve 2 are secured by the activation of the small hydraulic power generator 5, in the control means 15, a set flow rate inputted beforehand and a secondary pressure detected by a pressure sensor 18 are compared, and the pressure of a secondary side is controlled by narrowing the valve opening of the motor-driven valve 2 by an opening control signal 16 when the secondary pressure becomes higher than a set pressure and opening the valve opening of the motor-driven valve 2 by the opening control signal 16 when the secondary pressure becomes lower than the set pressure. COPYRIGHT: (C)2004,JPO&NCIPI
|
