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Method for mounting large-scale gangplank of ro-ro vessel

A technology of ro-ro ships and springboards, which is applied to ship components, ship construction, transportation and packaging, etc. It can solve the problems that the installation and welding process cannot meet the requirements, achieve reliable technical process guarantee, improve service life, and ensure coaxiality Effect

Inactive Publication Date: 2008-09-24
CHINA GEZHOUBA GROUP MACHINERY & SHIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For ro-ro carriers with large hinge structures and high installation accuracy requirements, a single installation welding process cannot meet the requirements

Method used

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  • Method for mounting large-scale gangplank of ro-ro vessel
  • Method for mounting large-scale gangplank of ro-ro vessel
  • Method for mounting large-scale gangplank of ro-ro vessel

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Experimental program
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Effect test

specific Embodiment approach

[0012] 1. Technical requirements for hinge processing and installation

[0013] The technical requirements for springboard hinge support 1, springboard hinge support 2 and springboard hinge shaft 3 are as follows:

[0014] 1) The width of the opening of support 1 is 272mm, and the width of the insertion end of support 2 is 270mm. Considering the free tolerance, the opening width of support 1 is 272mm +3 mm, the width of the insertion end of support 2 is 270 -0.5 mm processing.

[0015] 2) The size of the hinge holes of support 1 and support 2 is φ260 +0.2 mm, hinge shaft size according to φ258 -0.2 mm processing.

[0016] 3) The perpendicularity between the axis of the hinge hole of support 1 and the processing surface of the opening, and the axis of the hinge hole of support 2 and the processing surface of the insertion end is not greater than 0.2mm.

[0017] 4) The coaxiality of the 7 hinge installations is not greater than φ2.4mm.

[0018] 5) The installation spacing ...

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PUM

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Abstract

The invention relates to a method used for mounting a large-scale springboard of a Ro-Ro ship. The major technics of the invention is that gemel supporting seat holes are bored first, then the assembly is carried out, and positioning dummy spindles are adopted to carry out the positioning and the installation of a plurality of gemel supporting seats. Reasonable technics of controlling the welding deformation is made and carried out to guarantee the assembly accuracy as well as to regulate the welding deformation, so that the installation accuracies of the coaxiality among gemels, the openings of gemels, the axes verticality, etc. and the construction quality are met the design requirements.

Description

technical field [0001] The invention relates to a method for installing a large springboard of a roll-on-roll ship. Background technique [0002] Ro-ro ships such as the Three Gorges heavy equipment transport ro-ro ship springboard carries 734 tons of ro-ro cargo. Its structure is 14 meters long, 12 meters wide, 0.7 meters thick, and 100 tons in weight. 7 pairs of forged steel hinges, each hinge weighs 4.2 tons, and the hinges are connected to the bow of the hull and the rear end of the springboard by welding. The self-weight of large ro-ro ship springboards such as Chuanjiang 60 parking spaces is about 50 tons, and the weight of each hinge is about 1 ton. Most of them are steel plate welded structures. The hinges are installed separately. However, for ro-ro carriers with large hinge structures and high installation precision requirements, a single installation and welding process cannot meet the requirements. Contents of the invention [0003] The purpose of the presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B9/06
Inventor 李丽丽南平罗国胜李金波汪勇军廖全勇向安玉陶桓林陈爱国
Owner CHINA GEZHOUBA GROUP MACHINERY & SHIP
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