Connection device and method for topside module and bottomside supporting structure for offshore booster station

Abstract

The invention discloses a connection device and method for a topside module and a bottomside supporting structure for an offshore booster station, wherein the connection device is formed by connectinga frustum structure with a transition section structure; the frustum structure comprises a round steel pipe and a cone frustum welded to the lower end of the round steel pipe; the transition sectionstructure comprises an upper pipe section, an inclined pipe section and a guide pipe section which are sequentially welded with one another from top to bottom; the lower end of the inclined pipe section is closely fixed to a bottomside supporting steel pile together through a butt welding seam; and the upper pipe section is closely fixed to a topside module pillar together through a butt welding seam. The construction method for the connection device comprises the following steps of preparation of the frustum structure, preparation of the transition section structure, finishing of connection construction of the topside module and the bottomside supporting structure of the offshore booster station and the like. The connection device and method have the advantages of small steel dosage, simple structure, low cost, short offshore construction period, high safety and the like and have relatively high popularization and application properties and social and economic values.

Description

technical field [0001] The invention relates to a connection device and method, in particular to a connection device and method for an upper block and a lower support structure of an offshore booster station. Background technique [0002] With the rapid development of the offshore wind power industry, more and more projects have been approved and started, and my country's offshore wind power has gradually entered a new stage of large-scale construction. The scale of offshore wind farms is gradually increasing, and the distance from the shore is getting farther and farther. Offshore booster stations are widely used as an essential facility for the development of offshore wind farms. [0003] The offshore booster station is generally divided into the upper block and the lower support structure, which is the booster, power distribution and control center of the offshore wind farm. The upper block is generally equipped with various electrical equipment such as main transformers...

AI Technical Summary

Problems solved by technology

[0007] 1) The structure is complex, there are many parts such as stiffening ribs, conical plates, ring plates, reinforcing plate sealing plates, round pipes, etc., and grouting pipelines need to be pre-installed, which is difficult to manufacture and process, requires more welding work, and consumes a large amount of steel ;

[0008] 2) The construction and installation process is complicated, and grouting is required for each joint, resulting in a long offshore construction period;

[0009] 3) There is a large gap between the guide vertebral body and the steel pile at the lower part of the column of the upper block, and it is difficult to realize the centering installation, and there is usually a large eccentricity, which is not good for the structural strength

Images