| 摘要 |
PURPOSE:To perform efficient opening/closing actions of a valve body without requiring an installation space of an operation mechanism by providing a mechanism applying a rotating force directly to a valve shaft in the valve shaft constituting a valve. CONSTITUTION:A blade (stationary plate) 29 fixed to a bearing cover 19 through packings 26, 27, 28 and having a column section in the center of the fan-shaped spaces is arranged in a hollow cylinder section 24 composed of two fan-shaped spaces symmetrically located across the center axis of a valve shaft 17. When the valve operation liquid pressure is fed to a liquid pressure feed port 30, the liquid pressure is applied to the space formed by a blade 29 and the hollow cylinder section 24, but since the blade 29 is fixed, a valve shaft 17 is rotated. When the valve operation liquid pressure is fed through a liquid pressure feed port 31 for a closing action, the rotation of the valve shaft 17 can be reversed. Thereby, the installation space of the valve can be reduced and a movable portion outside the valve can be made unnecessary. |
