| 摘要 |
A quick coupling conceived for conduits under pressure comprise a latch which permits the disengagement of a male portion (10) from a female portion (1, 3) in two phases. During the first phase the male portion (10) retracts a controlled distance from its fully engaged position and arrives in an intermediary position in which the valve (5) of the female portion (1, 3) is closed. It further comprises openings (27, 28, 29) for the escape of the fluid under pressure, which openings are situated downstream from the valve (5) and this openings are opened during the said first phase of disengagement. In the final phase, the male portion (10) is completely disengaged from the female portion. The controlled disengagement in two phases is effectuated by the cooperation of a latch comprising two actually distance teeth which are positioned in a manner as to oppose each other with respect to the circumferential surface of the male portion in order to alternatively engage of disengage a projection-groove (19) of the male portion. The control disengagement in two phases avoids a shock which will otherwise be produced during uncontrolled disengagement of the two portions of a coupling in a circuit under pressure. |
