| 摘要 |
<p>The hydraulic swivelling mechanism is intended for turning gate leaves. It consists of a hydraulic cylinder with block containing the hydraulic control elements fitted on the upper end of the cylinder. A block solenoid operating slide valve is fitted and provided with handle for manual emergency operation. The upper end, the control block is extended into an eyelet. The cylinder contains a double acting piston with piston rod penetrating its lower end. The operation of the cylinders involves a pulling action of the rod on the crank arm of the working attachment. After passing the upper dead centre a pushing action follows achieving a 180 deg. travel of the crank arm pin.</p> |
