| 摘要 |
<p>The present invention provides an actuating arrangement for pipeline valves, the actuating arrangement comprising: a reduction gear (4, 5) comprising output (7) and input shafts (6) arranged coaxially, a motor (1) coupled with the input shaft of the reduction gear in a manner enabling transfer of rotary motion of the motor to the reduction gear output shaft, an interlocking arrangement (2) adapted to lock the motor shaft, a manual drive connected with the reduction gear through a worm gear in a manner enabling transmission of the manual drive rotary motion to the reduction gear output shaft, wherein the worm of the worm gear is adapted to perform an axial translational motion, limited by resilient members, due to imparting at least a part of the motor torque to the worm and the actuating arrangement comprises motor switches capable to be actuated by interaction with the worm performing the translational axial motion, characterized in that the actuating arrangement further comprises a two-sided limiting coupling (3) for limitation of torque, the coupling being arranged between the motor and the reduction gear input shaft. The technical result of the invention is compensation of excessive torques occurring on the reduction gear output shaft due to the motor rundown.</p> |
