MULTILEVEL TELESCOPING MECHANISM SEQUENTIAL CONTROL APPARATUS AND ENGINEERING EQUIPMENT COMPRISING SAME

摘要

A multilevel telescoping mechanism sequential control apparatus comprising: a first operating apparatus (11), for use in transferring a hydraulic fluid to a downstream component to control the operation of the downstream component, a first hydraulic cylinder (21) and a second hydraulic cylinder (22) arranged downstream with respect to the first operating apparatus (11) and are connected to the first operation apparatus (11). The first hydraulic cylinder (21) and the second hydraulic cylinder (22) respectively are connected to two telescoping components of the multilevel telescoping mechanism to drive respectively the two telescoping components. A rod-free chamber (21a) of the first hydraulic cylinder (21) is connected to a first port (11a) of the first operating apparatus (11); a rod-having chamber (21b) of the first hydraulic cylinder (21) is connected to a second port (11b) of the first operating apparatus (11). The rod-free chamber (21a) of the first hydraulic cylinder (21) is connected to a rod-free chamber (22a) of the second hydraulic cylinder (22); the rod-having chamber (21b) of the first hydraulic cylinder (21) is connected to a rod-having chamber (22b) of the second hydraulic cylinder (22). The cross-sectional area (Srod1) of the rod-having chamber (21b) of the first hydraulic cylinder (21) is smaller than the cross-sectional area (Srod2) of the rod-having chamber (22b) of the second hydraulic cylinder (22).