| 摘要 |
The lock valve (8) comprises a block (11) with one or more pressure ports (13) and a return port (14). The pressure ports can be connected via a tubular lock cylinder (15) with the return port or cut off from it. The lock cylinder has apertures (18) in its outer surface corresp. with the position for the pressure ports, and an axial aperture directed towards the return port. The tubular lock cylinder is rotatable between a position where its surface apertures are centred w.r.t. the pressure port and one where the apertures are moved away from the pressure port so that the flow path is interrupted. |
