| 摘要 |
<p>The fitting comprises two fitting parts (1, 2) connectable to respective pipes and provided with respective ball valves (7, 8) one of which (7) with concavity, and coupling means (20) of the quick release type for the aforementioned fitting parts (1, 2). It provides functional interconnection means (40-53) that prevent the closing of the valve without concavity (8) before the closing of the valve with concavity (7) and the release of the coupling device (20) before the closing of the valve without concavity. Said functional interconnection means (40-53) comprise a first control lever (40) for the closing rotation of the valve with concavity (7), a second control lever (45) for the closing rotation of the valve without concavity (8), that is hinged on the same axes of the first lever (40) and has a rotation subordinated to the removal of a mechanical block caused by said first lever (40) in opening position. A first hydraulic cylinder (42) controls the rotation of said first lever (40) toward a closing position of the valve with concavity (7), and a second hydraulic cylinder (48) controls the rotation of said second lever (45) toward a closing position of the valve without concavity (8) after the removal of said mechanical block and, subsequently, the release of the coupling device (20) of the two fitting parts (1, 2). <IMAGE></p> |
