| 摘要 |
<p>A mechanism for a hydraulic pipe comprises two rotatable cut-off devices in series arranged inside two half-shells which are arranged symmetrically, relative to a mean transverse plane, and which are connected by being bolted together by their flanges. Each half-shell supports the journals of a cut-off device and an intermediate piece may be provided for supporting center gaskets. The mechanism is particularly applicable to the protection of turbines in a high-fall hydroelectric installation.</p> |
