| 摘要 |
PURPOSE:To provide a long life of a valve by facilitating the flexion of a flexible pipe and reducing tensile stress, in opening and closing a fluid path by flexing the flexible pipe. CONSTITUTION:When pressurized fluid is introduced into a fluid chamber 17, a portion 18 of a flexible pipe 13 is pressed against seal surfaces A, B to close a plurality of valve holes 9 provided in a cylindrical pipe 8 and interrupt the communication between an inlet 3 and an outlet 4. Also, when the pressurized fluid in the fluid chamber 17 is discharged, the flexible pipe 13 is spaced from the seal surface A of the cylindrical pipe 8 with the expansion of the portion 18 at the outlet 4 side due to the differential pressure between the inlet 3 side and the pressure chamber 17, so that the inlet 3 communicates to the outlet 4. Since the inlet 3 side portion of the flexible pipe 13 has the thickness thinner and the diameter larger than those of the outlet 4 side portion, it tends to have small deformation and be easily deformed so that fluid is apt to flow. Also since the outlet 3 side of the flexible pipe 13 is not fixed, the flexible pipe 13 is easily flexed with small tensile stress to elongate its life. |
