| 摘要 |
<p>The invention concerns a releasing device (30) to be inserted between a power actuator (20, 87) for valves and a valve (10) to be controlled. It comprises a driving component (36) to be interfaced with the power actuator (20), a driven component (37) to be interfaced with the shutter of the controlled valve (10), and a connecting component (38) all rotating of at least 90° around the same axis (X). The connecting component (38) is provided with clutching means (50) to catch both with the driving component (36) and the driven component (37), or with the driven component (37) only. When the connecting component (38) is caught to the driving component (36), this causes the opening and closing rotations of the shutter of the valve (10) and the loading of return springs (60, 60'); when the connecting component (38) is caught to the driven component (37) only, this causes the shutter of the valve (10) to rotate rapidly in its closing direction due to the action of the return springs (60, 60') connected therewith.</p> |
