A construction process for the lower part of an offshore booster station

Abstract

A construction process of a lower assembly of an offshore voltage booster substation, the process comprising the following steps: (1) performing, according to a nesting drawing, a blanking operation on a steel sheet; (2) marking lines, and cutting grooves; (3) fabricating steel tube piles (1), transverse support rods, and diagonal support rods (5); and (4) joining and welding the steel tube piles (1), transverse support rods, and diagonal support rods (5). By horizontally constructing each section and then joining and welding the same vertically, the construction process is performed in an orderly manner to improve the construction efficiency and enable the lower assembly to provide stable support, thus facilitating long-term operation maintenances of an offshore voltage booster substation. The steel tube pile (1) comprises a vertical portion and an inclined portion inclined toward an inner side, thus greatly improving support provided by the lower assembly, and lowering the possibility of tilting. The present invention has high requirements for rolling and cutting operations, and employs submerged arc welding to provide stable welding quality and high welding production efficiency with no arc light and little fumes and dust. In addition, a reasonable welding allowance is employed to ensure welding quality and precision, thus significantly improving support provided by the lower assembly, and providing stability to the whole offshore voltage booster substation.

Description

technical field [0001] The invention belongs to the field of marine transportation and manufacturing, and in particular relates to a construction process for a lower component of an offshore booster station. Background technique [0002] With the huge consumption of fossil energy and the serious pollution of the environment, renewable energy has received more and more attention from all over the world, and wind energy has become one of the most competitive new energy sources. Compared with onshore wind power, offshore wind power is not only inferior Occupying land resources, rich in energy, stable output, and high utilization rate have become a new direction for the development of wind power in the world. At present, most of the offshore wind power under construction in my country is 10-30km offshore, and the planned capacity of the project is 200-300kw. Multiple 3mw-6mw offshore wind turbines are used to generate power in groups, and the power is sent to the offshore step-u...

AI Technical Summary

Problems solved by technology

[0003] The lower component plays a supporting role for the entire offshore booster station, so the requirements for the rolling, cutting, welding, fabrication and closing of the lower component are very strict. When the lower component of the traditional offshore booster station is constructed, there are the following disadvantages: Due to the large structure of the lower component, the overall construction of the lower component is more difficult, time-consuming and labor-intensive, the steps are complicated and messy, and the requirements for rounding and cutting are low during construction, the welding is unstable, and the welding quality is poor, which greatly weakens the The connection accuracy and support of the lower components bring certain instability to the entire offshore booster station

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