| 摘要 |
FIELD: mining industry. ^ SUBSTANCE: mouth equipment consists of body with upper and lower flanges, wherein central axial channel and side branches are made: lower ones for connection to behind-pipe space of well, and also upper ones for connection to pipe channel of well. In axial channel pipe holder for holding lifting column is positioned. In two upper side branches, placed oppositely to each other, dies are mounted with driving assemblies for displacement. Each die consists of base and insert, moveably interconnected via connection panels. Drive assembly has profiled bushing with screw, mounted in its axial channel. Base is connected to one end of screw, and on other end profile surfaces for steering shaft are made. Guiding insert is placed inside axial channel of profiled bushing and upper side branch. Upper ends of directing insert and pipe holder are placed in same plane. When it is necessary to dismount driving mechanism, screws are rotated. Dies move in radial direction relatively to central channel axis. Bases interact first with upper ends of guiding inserts, and then with upper end of pipe holder. Inserts solidly envelope polished rod, raise it a bit, and then fix it reliably in this position. ^ EFFECT: higher reliability, broader functional capabilities, simplified maintenance and lesser dimensions. ^ 2 cl, 2 dwg |
