Stern hydraulic rudder installing walking trolley

Abstract

The invention discloses a stern hydraulic rudder installing walking trolley in the shipbuilding technical field. The walking trolley comprises a main platform, rolling wheels, a pair of plane sliding tables and corresponding installation floor stands, wherein the two plane sliding tables are respectively and movably arranged at the left and the right sides of the main platform; the rolling wheelsdriven by four hydraulic motors are respectively and fixedly arranged at four vertex angles under the main platform; and the installation floor stands are respectively and fixedly arranged on the corresponding plane sliding tables. The walking trolley disclosed by the invention meets the installation requirements on the ship rudder blade and the screw propeller, improves the installment efficiency, avoids potential safety hazards, shortens the using period of the unit ship and improves the shipbuilding efficiency.

Description

technical field [0001] The invention relates to a device in the technical field of shipbuilding, in particular to a traveling trolley for installing hydraulic propellers and rudders at the stern of a ship. Background technique [0002] With the development of shipbuilding technology, the same period of shipbuilding, construction quality, and construction safety have been greatly improved. The tonnage of ships is showing a trend of increasing development. The types of ships are increasing, and there is an urgent need for reliable, safe, stable and simple construction equipment. . Ship rudder blades and ship propellers are the main components of ships. They are characterized by large volume and mass, and the maximum mass exceeds 100 tons per piece. Due to restrictions, large slipways or dock door cranes cannot be used for installation. [0003] Prior art has two kinds, and a kind of is to adopt original simple method. First, weld several hanging codes of cranes on the hull ...

AI Technical Summary

Problems solved by technology

There are several problems in this prior art: (1) because the traveling trolley is a unequal-sided rectangle, the track and wheelbase of the rolling wheels below are asymmetrical. Correspondingly readjusted according to wheelbase and wheelbase, and brings unreliable factors to the stability when moving

(2) The 90° rotation of the scroll wheel under the workbench is done manually. When the workbench platform is switched from lateral movement to longitudinal movement, since several scroll wheels are driven by hydraulic motors respectively, if the scroll wheel rotates 90°, the hydraulic pressure will be caused. If the rotation direction of the motor is inconsistent, the movement of the workbench platform will cause great problems and dangers, and the manual operation guarantee is unreliable

(3) The four hydraulic hydraulic cylinders at the four corners of the trolley are controlled by a set of oil circuits to rise or fall synchronously. On the one hand, the length of the oil path (via) from the oil pipe to each hydraulic cylinder after the control valve is different, resulting in The difference in oil pressure loss will inevitably cause the difference in the rising or falling speed of the four hydraulic cylinders. On the other hand, the load of the traveling trolley is very uneven, and the large and small loads cause the difference in the rising or falling speed of the hydraulic cylinders. The difference in rising or falling displacement, when serious, the worktable will be seriously tilted, which will greatly cause installation safety problems, and the rudder blade and propeller must be installed with a certain degree of precision, and serious tilting will increase the difficulty of installation

(4) lifting stand is installed on the movable sliding platform of both sides of walking dolly, when rudder blade is installed, because rudder blade is complex spiral shape, often down big and up small, the stand of prior art is straight stand , when the operator installs on the hull above the rudder blade, the upper end must be installed on the stand to install the scaffolding for operation, and a springboard is added, which is time-consuming and unsafe

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