| 摘要 |
<p>A quick-closure coupling for hydraulic lines in which two insertable coupling halves are lockable in a coupling position, and are constructed in the form of a plug valve and a sleeve valve, each having a closure piece. The closure piece is spring loaded in the closure direction, and held in a closed position when the coupling halves are separated. One of the coupling halves is provided with a stop which restricts a valve stroke of the closure piece in the opening position. The other coupling half has the closure piece loaded with a stronger spring and has a valve stroke equal to twice the opening stroke of the other closure piece. One of the coupling halves has a closure piece which can execute the opening stroke, and has a locking device which is ready to lock due to axial displacement of the closure piece beyond a single opening stroke. After returning the closure piece to its opening position corresponding to the single valve stroke, the locking device reaches a stop position restricting the valve stroke to this opening position. But the locking device is moved back during disconnection of the coupling halves to its release position, permitting thereby a double valve stroke. The locking device may be in the form of a stop spring loaded in a direction of its locking position.</p> |
