Mine-working compressed air supply pipe with radial nipple - has radial recess between connecting pipe flange and top pressure piece

摘要

A radial nipple, or more than one, has a self-closing valve and acts in conjunction with screws of a smaller dia. supply pipe, in a compressed air supply pipe in a mine, esp. as a long face working lead. The supply pipe (1) accommodates a radial recess (3), with edges clamped between an end flange (a) of the connecting pipe (which has an internal thread (10) for the nipple), inserted through the recess, and superimposed piece (11) in the form of pressure piece. The pressure piece acts in conjunction with a form-locking searing unit (7) supported on the outer end (6) of the connecting-pipe (5).