An intake for quick coupling pipes, to form a joint, including a body defining a central axis and a first channel at least partially centered relative to the central axis to partially house the joint, an annular sealing element movably within the first channel including a plurality of fastening sectors to reciprocally radially move and define release and clamping positions, an extractor partially in the body, movable along the central axis relative to the body and allowing the sealing element to pass from the clamping position to the release position. The body includes an obstruction defining a ring within the first channel. The sealing element defines an interference portion interfering with the obstruction. The obstruction and interference portion form a circular fulcrum around which the fastening sectors rotate and provide the release position as result of opening thrust caused by the extractor or joint passing in the sealing element.