SLACK FREE INSERTION CONNECTION FOR PIPES AND HOSES Russian patent published in 2018 - IPC F16L37/88 

FIELD: manufacturing procedure.

SUBSTANCE: invention relates to plug-in connection (1) for tubing or hose lines with screw-on casing (3) and with cap nut (4) screwed onto the screwed housing to lock inserted into screwed housing of branch pipe (5) by means of retaining ring (7) resting on fixing surface (6) on the nozzle. Stepped recess (10) for receiving retaining ring (7) is provided on the bottom surface (9) of chamber (8) associated with locking ring, consisting of the first step (11) and adjacent to it, fixing the second step (12). In chamber (8) there is sealing insertion sleeve with respect to screwed housing, seal (13), and nipple, by applying pressure to the medium is translatable from its insertion position against the insertion direction with respect to screwed housing into its locking position. In chamber (8), locking ring (15) is located between locking ring (7) and seal (13), which is in abutment with one side of locking ring (7), and, on the other hand, with seal (13) and which is supported between the inserted nozzle (5) and made in screw-on casing and / or union nut and tilted in the direction of locking ring to the longitudinal axis of pipe by contact surface (16). Contact surface (16) is inclined so that, when nozzle (5) is in locking position, by means of pressure-loaded seal (13), locking ring (15) moved to its locking position is clamped with self-locking in chamber (8) and thus without gap fixes branch pipe.

EFFECT: invention improves connection reliability.

8 cl, 6 dwg