Blow pipe for blowing packing from a pneumatic-packing line in underground operation comprising a plurality of pipes which are flange-mounted on one another in such a way that they can be angled off

摘要

The invention relates to a blow pipe for blowing packing from a pneumatic-packing line, comprising a plurality of pipes flange-mounted on one another, in underground operation, which blow pipe, for coupling and uncoupling adjacent pipe flanges, has on the flange side a plurality of rockers, which are linked to a bearing ring and, by means of the overlapping, preferably axially movable adjusting ring interacting with a sloping claw rear face and driven, for example, by at least one hydraulic thrust piston mechanism, can be moved into a locking position and can be held by means of a safety device in the locking position, from which they can be moved mechanically into their open position when the adjusting ring is pulled back, and provides a coupling, which is quite safe and cannot fail as a result of contamination or fatigue, by arms being linked to the rockers, the free ends of which arms are mounted in such a way as to be axially movable to a limited extent in an annular slide member enclosing the pipe circumference, which annular slide member is displaceable together with the adjusting ring, which in the locking position serves as a safety device which consists of interacting cylinder surfaces of the adjusting ring and the claw back.