| 摘要 |
FIELD: valve production, valve control. SUBSTANCE: drive of rotary isolation members of pipelines has casing, rotation motor, reduce gear, screw pair, connecting link made in the form of double fork and secured to the casing using two supports, slide block placed between connection link forks and interacting through pivots with surfaces of connection link fork slots and two guide slots originated in the casing, as well as means of stopping the screw of the screw pair with the slide blocks in terminal positions. Screw pair nut is made in the form of a cylinder with axis being perpendicular to threaded opening, and placed so as to be rotated and have play in cylindrical space originated in the slide block. In so doing cylindrical space axis is perpendicular to the axis the pivots and screw axis are located along. EFFECT: lateral load free operation. 3 cl, 3 dwg |
