| 摘要 |
FIELD: mining industry. ^ SUBSTANCE: device has hollow cylindrical body with radial apertures and ring-shaped shelves at the ends and self-compacting collars. These are mounted on opposite ends of body and are adjacent by bases to its ring-shaped shelves. On the latter barrels are fitted with central apertures in bases. Through barrels and body a pipe is let with possible longitudinal displacement relatively to body, having radial apertures, ring-shaped shelf at one end and outer thread at other end. Pipe is pressurized on the side of ring-shaped shelf, its radial apertures are in zone of radial apertures of body, one barrel is stopped against ring-shaped shelf of pipe, and other barrel is connected to pipe by threaded connection. ^ EFFECT: higher efficiency. ^ 1 dwg |
