Connection for ventilation pipe section used in mining or tunneling

摘要

The flexible ventilation piping has a snap lock bond (6) between sections as a plug and ratchet system. They have identical ratchet rings (9,10) at both sides and corresponding coupling sections (11) to lock into them. The ratchet rings (9,10) have an arrow-shaped opening (17), on the side away from the separate pipes (2,3), with a narrow insertion slit (18) for the inserted arrowheads (12,14) of the coupling (11).