Nuclear power CB20 module integral splicing transportation platform

Abstract

The invention discloses a nuclear power CB20 module integral splicing transportation platform. The platform comprises detachable column supports, a splicing transportation platform body in the middle and a module support jig at the top. The splicing transportation platform body comprises main girders and auxiliary girders. The main girders are arranged horizontally and vertically crosswise. The auxiliary girders are arranged between the adjacent main girders, and the main girders are in welding connection with the auxiliary girders. The center of the module support jig is a hollow cylinder rolled through a steel plate, and the bottom of the hollow cylinder is fixed on the main girder at the top. A plurality of third H-shaped steels are distributed on the periphery of the hollow cylinder radially uniformly, and intersections of the plurality of the third H-shaped steels and the center of the hollow cylinder coincide. The wing edges of the third H-shaped steels and the wing edges of T-shaped steels at the bottom of the CB20 module are attached and aligned through detachable U-shaped clamps when the CB20 module is mounted on the module support jig.

Description

technical field [0001] The invention relates to a nuclear power CB20 module integral assembly transportation platform. Background technique [0002] The structure module CB20 sub-module of the third-generation nuclear power unit AP1000 / CAP1400 is a multi-component combination, which is generally assembled by welding and assembling many sub-modules. The sub-modules need to be welded together, and the positioning error of the sub-modules is required to be ±6.4mm, and the overall module size tolerance after assembly is also required to be ±6.4mm. Generally, the external dimensions of large-scale structural modules are more than 20m in length, width and height, which requires very high accuracy for module positioning and assembly. [0003] Haiyang Nuclear Power Phase 1#2# nuclear island CB20 sub-module project, the module is composed of 112 sub-modules, the diameter of the outer ring is about 25908mm, the height of the outer ring is about 10292mm, the diameter of the inner ring...

AI Technical Summary

Problems solved by technology

[0004] 1. CB20 needs to be assembled in the open air, the site is windy, the air is humid, and there is rain and snow, so the welding protection requirements are high;

[0005] 2. The size of the CB20 module is large, the tank wall structure is thin and the weight of the single piece is light. There are strong winds, rain, heavy snow and other weather on site, which has a great impact on the stability of the module assembly process;

[0006] 3. The number of CB20 sub-modules is large, and it is difficult to control the overall shape and structure size during assembly;

[0007] 4. CB20 module assembly involves many materials and many welding processes, making it difficult for welders to operate;

[0008] 5. The tank wall structure of the CB20 module is thin, the welding seam is long, and the overall weight is heavy. Anti-deformation measures must be set during the welding assembly and hoisting process;

[0010] 7. After the CB20 chamber is formed, it is a confined space, in which measures such as ventilation, lighting, and drainage need to be improved for measurement operations;

[0012] To sum up, the CB20 sub-module has a complex structure and needs to be assembled into a whole in the open air on site, which involves various links such as measurement, assembly, and welding. The construction is difficult, and how to transport each module to the designated place is also a difficult point

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