Horizontal pinned hydraulic system of crawler crane counterweight

Abstract

The invention discloses a horizontal pinned hydraulic system of a crawler crane counterweight. The system comprises two pinned cylinders which are arranged symmetrically, a travel switch for controlling the travel of each piston rod is arranged on one side of the piston rod of each of the two pinned cylinders, rod cavity inlet pipelines of the two pinned cylinders are connected, rod-free cavity inlet pipelines of the two pinned cylinders are connected, a hydraulic control one-way valve is arranged on each of the rod cavity inlet pipelines, a hydraulic control one-way valve is arranged on each of the rod-free cavity inlet pipelines, each hydraulic control one-way valve is connected with a three-station four-way electromagnetic reversing valve through a pipeline, the oil inlet of the three-station four-way electromagnetic reversing valve is connected with a variable pump connected with an oil tank through a pipeline, a safety valve is connected to the outlet of the variable pump, and the oil outlet of the three-station four-way electromagnetic reversing valve is connected with a two-station three-way electromagnetic reversing valve connected with the oil tank through a pipeline. Stretching of the piston rods of the pinned cylinders is controlled through the hydraulic system, so that the piston rods of the pinned cylinders stretch, and the effect of horizontally locking the counterweight is achieved; and the system is simple in structure, time-saving, labor-saving, safe and high in reliability.

Description

technical field [0001] The invention relates to a hydraulic device for horizontal pinning of the counterweight of a crane, which is especially suitable for crawler cranes and belongs to the category of hydraulic control systems. Background technique [0002] Before using the crane to lift the weight, it is necessary to install the counterweight to the rear of the crane turntable to adjust the position of the center of gravity of the machine body and increase the anti-overturning moment of the machine body to meet the requirements of the strength of the slewing bearing of the crane and the stability of the whole machine, and prevent the hoisting Occurrence of a vehicle rollover accident. To locate the counterweight at the rear of the crane turntable structure, it is necessary to give the counterweight a certain amount of restraint in the vertical and horizontal directions to lock the counterweight and prevent it from shaking, so as to ensure the safety of subsequent operation...

AI Technical Summary

Problems solved by technology

This method of positioning the counterweight in the horizontal direction is time-consuming, laborious, and unsafe, and accidents such as being injured by the counterweight when the driver plugs in may occur

Moreover, in the subsequent operations such as lifting and running with load, the counterweight pin may be loosened or pulled out by itself due to the tilting, shaking, and impact of the crane body, causing potential safety hazards.

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