| 摘要 |
PURPOSE:To certainly cut-off the flow of the fluid in a fluid flow passage by arranging at least two partitioning members supporting an expandable annular bag from inside, into the fluid flow passage. CONSTITUTION:Each partitioning members 21, 22 arranged in a fluid flow passage 10, keeping the prescribed intervals, consists of an annular bag 2 and a supporting member 1 supporting the bag 2 from inside. With an air charging and discharging passage, the annular bag 2 of the partitioning member 21 communicates through a fluid joint 7a, and the annular bag 2 of the partitioning member 22 communicates through a fluid joint 8a, and a space 30 communicates through a fluid joint 9a. The annular bag 2 is expanded by the pressure of the pressurized air inside, and the flow of the fluid in the fluid flow passage 10 is certainly cut-off. The partitioning member is pressed from the back surface by filling the space 30 by the pressurized air, and the shift or deformation of the partitioning member can be prevented. |
