Quick Coupling for Joining Together Two Pipes for Conveying a Gas Under Pressure

摘要

The coupling comprises a male plug ( 3 ) and a female element ( 2 ). A retaining latch ( 20 ) for retaining the plug ( 5 ) in the female element ( 7 ) is movable between a first position in which said latch ( 20 ) is capable of retaining the plug ( 5 ) engaged to a first depth in the female element ( 7 ) in which it is connected in leaktight manner to said female element, and a second position in which said latch ( 20 ) is suitable for retaining the male plug ( 5 ) engaged to a second depth that is smaller than the first depth. The latch ( 20 ) is configured in such a manner as to be returned (F₃) towards the second position at least in part by positive pressure in a passage ( 4, 17, 26, 34 ) for purging the downstream pipe when the plug is at the second depth. In a variant embodiment, the coupling includes an adapter that the latch is suitable for retaining.