JOINT FOR FLEXIBLE VENTILATION PIPES

摘要

FIELD: mining. SUBSTANCE: joint has links of pipes to be joined. The links are provided with locking rings between which a detachable distance ring is interposed. The ring is made up as a one-turn plate torsion spring. The radius of curvature of the spring varies. A locking pin is secured at one of the ends of the spring from outside. A through groove for holding the spring in a compressed state is provided at the other end of the spring. In accordance to the second version, linings are rigidly secured on the outer side of one end and inner side of the other end of the spring. The working surfaces of the linings are inclined. EFFECT: enhanced reliability. 5 cl, 4 dwg