The control system and the crane of the buffer oil cylinder of the spreader of the container front load crane

Abstract

The invention discloses a container front lifting crane and a control system of a lifting appliance buffer oil cylinder of the container front lifting crane. A hydraulic subsystem comprises an electric-hydraulic proportional control valve arranged in an oil inlet channel; pressure oil enters an oil inlet of the lifting appliance buffer oil cylinder through the electric-hydraulic proportional control valve; a control device is electrically connected with the electric-hydraulic proportional control valve, and can be used for adjusting the current input by the electric-hydraulic proportional control valve so as to control a piston rod of the lifting appliance buffer oil cylinder to stretch out or contract back. According to the control system and the crane, the angle of inclination of a lifting appliance can be controlled by controlling the current input by the electric-hydraulic proportional control valve, so that the angle of inclination of the lifting appliance can be controlled, the judgment of box alignment of an operator can be improved, the box alignment can be conveniently and smoothly completed, and the lifting transfer efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a control system for a buffer oil cylinder of a spreader of a container front load crane and the crane. Background technique [0002] The container reach stacker crane (hereinafter referred to as the reach stacker) is a special machine used for container loading, unloading, stacking and horizontal transportation, and is widely used in the lifting and transshipment of heavy objects in docks, ports, warehouses and other places. The spreader buffer oil cylinder is the spreader buffer oil cylinder installed on the spreader on the front loader. When aligning the box, it can make the spreader tilt at a certain angle, so as to facilitate the box alignment. At the same time, it can buffer the spreader during the lifting process. Swing, so that the container can be lifted smoothly. [0003] With the vigorous development of the container industry, container reach stackers ha...

AI Technical Summary

Problems solved by technology

The current control system of the spreader buffer cylinder has the following disadvantages: Figure 1D As shown, the inclination angle α of the spreader is not controlled

When the reach stacker is ready for lifting, it can be seen from the movement track of the spreader that the force arm L of the buffer cylinder of the spreader changes with the change of the luffing angle of the jib. Therefore, in order to maintain the inclination angle of the spreader, the spreader must The thrust of the buffer oil cylinder must be changed accordingly, and the pressure input to the buffer oil cylinder of the spreader is constant, and the thrust generated is also constant. With the change of the luffing angle of the boom, the inclination angle α of the spreader will also change, and α changes to If it is very small, it will interfere with the operator's operation of the box and affect the work efficiency

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