Hydraulic control system for hydraulic boarding ladder

Abstract

The invention relates to a hydraulic control system for a hydraulic boarding ladder. In the system, a ladder is connected to a rotary substrate through a rotary axis, and is connected with the piston of a lifting hydraulic cylinder; the lifting hydraulic cylinder is rotatably connected to the top surface of the rotary substrate through a pivot; a fuel tank and a pumping station are arranged in the rotary substrate; a rotary gear is fixed on the rotary substrate; and pinions are arranged on the output shafts of two hydraulic motors, are engaged with the rotary gear. The system is divided into a main rotary control part and a variable amplitude hydro-cylinder control part. The hydraulic control system has the advantages that the up-down left-right floating of the boarding ladder is realized by adopting a balance loop, and the problem of excessive rotation inertia is solved by adopting a proportional electromagnetic valve, wherein the proportional valve is utilized to control small current start when the system is started, after a certain speed is achieved, normal current is started to ensure that the ladder rotates smoothly, and the system is stopped slowly by controlling the proportional valve when the system is stopped, so the operation is smooth and reliable.

Description

technical field [0001] The invention relates to the field of marine equipment, in particular to a hydraulic control system of a hydraulic boarding ladder. Background technique [0002] At present, most of the passenger boarding and disembarking ships in various coastal ports and wharves in my country use simple boarding ladders except the ship's own gangway. This boarding ladder often needs to be adjusted by a manual device to adjust the lifting height, and the degree of automation is very low. In addition, such a boarding ladder sometimes requires the aid of equipment such as a crane to be well connected with the cabin door of the ship, and there are certain potential safety hazards. At present, there are also hydraulic boarding ladder devices. The structure of these boarding ladders is not compact enough. In addition, the impact of wind and waves on the hull will cause the hull to float up and down, shake left and right, and comprehensively move up and down. The boarding ...

AI Technical Summary

Problems solved by technology

[0003] The applicant provides a hydraulic control system for a hydraulic boarding ladder with a reasonable structure to meet the complex application environment in view of the above-mentioned shortcomings of the existing boarding ladder, such as low automation, insufficient compact structure, and inability to adapt to complex hull motions. If necessary, realize the two actions of floating up and down and shaking left and right, so as to ensure the stability and safety of equipment and personnel

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