LPG船双层底现校管改为预埋管的优化方法
2018-07-05张立敏王国旭
张立敏 王国旭
摘要:舾装周期在船舶建造中占比很大,其中管舾装在整个舾装作业中占比最大。由于管件制造精度、分段总组变形及安装误差等因素,导致在管舾装中,普遍利用现校管来实现整个管路系统的贯通,增加了管舾装的工作量。通过对某系列LPG船双层底分段合拢处的现校管问题进行分析,利用OTS系统进行模拟分段总组,通过模型分析确定搭载线,计算得出所需加工预埋管尺寸,并通过三维测量方法监控管件制作的轴向偏差和曲折偏差,从而实现将双层底区域的现校管优化为成品预埋管,提高船舶建造先行舾装率,缩短建造周期。
关键词:现校管;预埋管;分段合拢
中图分类号:TH13733文献标识码:A
doi:10.14031/j.cnki.njwx.2018.05.008
Abstract: In the process of shipbuilding outfitting period accounted for the largest, which in the whole pipe outfitting .Due to the manufacturing accuracy of pipe fittings, the deformation of the total block and the installation error and other factors,Lead in pipe outfitting, adjusting pipes are widely used to realize the transfixion of the whole pipeline system, increase the workload of outfitting tube.In this paper, the problem of the adjusting pipe in the double bottom section closure of a series of LPG ships is analyzed,using OTS system to simulate segmented general group,through model analysis to determine the carrying line,the size of the pipe to be machined is calculated,The axial deviation and twist deviation of pipe fittings are monitored by 3D measuring method,In order to achieve the double bottom area of the adjusting pipe optimization for finished product pre buried pipe,improve shipbuilding outfitting advance rate and shorten the construction period.
Keywords: existing pipe; pre buried pipe; segment closure
0引言
精度造船一直是困擾着整个造船业的主要问题。把控造船精度,在分段总组前就将舾装件安装误差和分段变形偏差控制在精度允许范围之内,不仅可以提高船舶总组搭载效率,还可以缩短船舶建造周期。而在船舶舾装方面,因为各系统的运行均是通过管路来实现的,所以管舾装是船舶舾装中的重要部分。在满足船体精度要求的前提下,加强管舾件的安装精度将对造船精度水平的提高起到重要作用。国内各造船厂在重视精度造船的同时借鉴国外精度造船经验,使造船精度控制技术不断提高,但是有些精度顽疾仍困扰着造船行业。在分段合拢时,由于分段变形、管舾件制造误差和安装误差等,经常会出现分段合拢处的预装管无法正常安装,从而需要根据现场尺寸制作成现校管来实现管件合拢。……
