One-time hoisting and positioning installation process of liquid cargo unit of liquefied gas ship

Abstract

The invention provides a one-time hoisting and positioning installation process for a liquid cargo unit of a liquefied gas ship. The horizontal data of the deck backing plate is collected by a high-precision total station, and one point is selected as a reference point to analyze and calculate the level difference of each deck backing plate. , and calculate the position of the lower margin line of the liquid cargo unit bracket according to the pin height of the liquid cargo unit bracket. Complete the hoisting and positioning work at one time. The present invention advances the margin of the lower opening of the liquid cargo unit support to before the liquid cargo unit is hoisted and positioned, greatly shortens the hoisting and positioning time of the liquid cargo unit, improves the installation and positioning efficiency of the liquid cargo unit of the liquefied gas ship, and reduces the resources of the gantry crane Waste, but also to a certain extent reduce the docking cycle of liquefied gas ships.

Description

technical field [0001] The invention belongs to the field of liquid cargo systems of liquefied gas ships, and in particular relates to a one-time hoisting and positioning installation process of a liquid cargo unit of a liquefied gas ship. Background technique [0002] The liquid cargo system is the core part of the liquefied gas carrier. During the construction of the liquefied gas carrier, the liquid cargo system is divided into several units for independent construction (pipes, brackets, cable brackets, etc. are made into several integral units). After the main deck is loaded and formed, each liquid cargo unit is hoisted onto the ship and docked. The liquid cargo unit of a liquefied gas ship is limited to the influence of factors such as the level of the hull deck and the deformation of the liquid cargo unit support during the manufacturing process. In the design stage, a 50mm margin is placed at the lower opening of the unit support to facilitate the hoisting of the liqu...

AI Technical Summary

Problems solved by technology

[0004] The installation and positioning process of the liquid cargo unit requires two positionings, and during the marking and trimming process of the liquid cargo unit support margin, the resources of the dock gantry crane are always occupied, and the dock lifting resources are greatly wasted;

[0005] The patent number is 2015106536553, and the patent name is the construction method of liquefied gas ship unit without margin docking. It discloses the construction method of the unit pipe rack, including the preparation before the manufacture of the unit pipe rack, reverse manufacturing, turning over, outfitting installation, unit The specific operation steps for hoisting and closing the pipe rack, but after the unit pipe rack is hoisted on board, the horizontal plane of the pipe rack is checked by laser or wire drawing, and the margin at the bottom of the pillar is cut off, which increases the workload on the ship. Due to the small working space and the limitation of the on-site environment of various operations, the efficiency of margin trimming is relatively low and there are many risk factors, which affect the docking cycle of the liquefied gas carrier to a certain extent; The level of the deck backing plate of the support is trimmed separately, only the height difference between adjacent units is required, and the overall level of the liquid cargo system is lacking in consideration, which affects the overall level of the unit after closing, and then affects the construction quality of the liquid cargo system

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