| 摘要 |
PURPOSE:To prevent a cylinder from wear and fixing by setting coil ends of an upper and a lower spring to be opposite in 180 degree + or -30 degrees on both sides of an intermediate spacer for reducing buckling. CONSTITUTION:A cylinder 1 and a piston 2 is provided to open and close a steam valve 6, while and intermediate liner 4 is provided to compose a double link spring 3 and a lower spring 5. The buckling amount of the spring is limited by a gap G between the cylinder 1 and the intermediate liner 4. In this construction, since large pressures of contacting faces ae given among the intermediate liner 4, the piston 2, and the cylinder 1, the buckling for compression is reduced and thus the wear and the fixing of the cylinder can be prevented. |
