| 摘要 |
<p>A torque reaction device (16, 90, 110, 130, 150) is disclosed which can be used with a power wrench (14) to open and close a valve (10) in a valve assembly (12) which absorbs the shock of opening and closing the valve. The torque reaction device includes a torque reaction arm (18) which is mounted on the power wrench. A torque reaction frame (20, 94, 114, 132, 154) is provided which is mounted to the valve assembly in a manner dependant upon the configuration of the valve assembly. The torque reaction frame mounts a U-channel (22) which interacts with the torque reaction arm (18) to prevent uncontrolled movement of the power wrench relative to the valve while opening and closing the valve.</p> |
