High-precision positioning and mounting method for ship stern ramp

Abstract

The invention discloses a high-precision positioning and mounting method for a ship stern ramp. The method comprises the following steps: step 1, hanging a stern door and a stern ramp to mounting point positions of a stern transom plate of a ship body; step 2, determining the mounting position of a main hinge according to the mounting position of the stern ramp, and determining the mounting position of a swing arm hinge eye plate; step 3, lifting away the stern door and the stern ramp, and installing a positioning measurement tool, wherein the positioning measurement tool comprises a swing rod, a fixing mechanism and a scribing mechanism, one end of the swing rod is connected with the fixing mechanism, and the other end is connected with the scribing mechanism; step 4, rotating the swing rod with the shaft hole as the center, and drawing mounting lines on a hull structure on the two sides in the door frame wall through the scribing mechanism; step 5, calculating the thickness cutting allowance of a swing arm track, and performing allowance cutting on a swing arm guide track; and step 6, positioning and welding the swing arm track according to a mounting line on the hull structure. The mounting position of the swing arm guide track can be quickly positioned, the personal safety of workers can be guaranteed, and potential safety hazards are avoided.

Description

technical field [0001] The invention belongs to the technical field of ship building, and in particular relates to a method for high-precision positioning and installation of a ship stern ramp. Background technique [0002] The stern passage system of some ship types is composed of a stern door and a springboard, which are used for large hovercraft to enter and exit the dock, and are the key to the entire passage system. Among them, the stern ramp is fixed on the deck of the dock by hinges, the stern door is hung on the stern seal by hinges, the stern ramp is turned upward to close, and the stern door is turned downward to close, and the two are locked together by hydraulic pressure. , pressed against the rubber of the door frame, thereby closing the stern of the ship, effectively separating the outside of the hull and the dock, and playing the role of a watertight bulkhead. The design of the stern door and the stern ramp is relatively complicated, and the installation is e...

AI Technical Summary

Problems solved by technology

[0003] Although the existing technology can ensure the installation size of the swing arm guide rail, the swing arm is installed in the inner space of the door frame between the hull structure and the hull structure. It is extremely inconvenient for personnel to work inside and the work efficiency is very low.

In addition, because the swing arm and the swing arm guide rail are temporarily fixed by hand chain hoists, coupled with the narrow construction factors, there is a great potential safety hazard in the operation

In addition, after the margin measurement of the swing arm guide rail, it is necessary to remove the swing arm guide rail for margin cutting, which increases the additional workload

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