RISE AND FALL CONTROL DEVICE OF FLEXIBLE FILM STRUCTURE AND INUNDATION PREVENTING FACILITY USING THIS DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a rise and fall control device of a flexible film structure capable of quickly raising up/bringing down the flexible film structure by a simple device, and capable of automatically holding its rising state.;SOLUTION: A suction side three-way valve 28 of a switching device 18 is switched to a position for supplying outside air to a suction port 16a of a high pressure air blower 16. A delivery side three-way valve 30 is switched to a position for sending compressed air delivered from a delivery port 16b to the flexible film structure 12. When operating the high pressure air blower 16, the outside air is sent into the flexible film structure 12. Operation of the high pressure air blower 16 is controlled, so that air pressure of the compressed air filled in the flexible film structure 12 becomes a prescribed preset pressure range by a pressure relay 40. While, the suction side three-way valve 28 and the delivery side three-way valve 30 of the switching device 18 are switched to an inverse position of a rising case. When operating the high pressure air blower 16, the compressed air filled in the flexible film structure 12 is forcibly sucked, and is discharged into the atmospheric air.;COPYRIGHT: (C)2005,JPO&NCIPI