| 摘要 |
PURPOSE:To operate a geothermal portable turbine or the like to actuate an auxiliary oil pump by feeding control oil to the turbine by a changeover valve detecting independently the oil pressure to perform the opening and closing operation of a steam valve. CONSTITUTION:The changeover valve 2 disposed between lower and upper oil chambers A and B keeps balance by the oil pressure of the chamber B and an intermediate spring 4. The control oil in an oil path 8 communicates with the oil chamber A via an orifice 6 and also communicates with the oil chamber B via a passage 11 and a passage 10 by the operation of a manual changeover valve 3. When the oil pressure assumes a value lower than the defined value, the changeover valve 2 is pushed up by the intermediate spring 4, and an oil discharge port 9 is opened, discharging oil contained within the chamber A into a drain C. When the oil pressure within the chamber A communicating with the steam valve 5 is lowered, the closing force of the steam valve 5 is reduced, and the steam valve 5 is opened, thus causing steam to flow into an auxiliary oil pump driving turbine to rotate the pump. Hence, the automatic operating device has no accessory device, and is simple in construction, and troubles occur scarcely. |
