Method for manufacturing buoyancy tanks of semi-submerged ship

Abstract

The invention discloses a method for manufacturing buoyancy tanks of a semi-submerged ship, which comprises the following steps of: (1) marking the center line of a movable jig frame, an involution line, the lower bottom position line and the top position line of an upper buoyancy tank as well as the upper top position line and the lower bottom position line of the lower buoyancy tank by using a total station on a jig position, and controlling the position line distance between the lower bottom of the upper buoyancy tank and the upper top of the lower buoyancy tank to be between 1 mm and 4 mm; (2) respectively manufacturing six face sheets of the upper buoyancy tank and sixe face sheets of the lower buoyancy tank on a platform; (3) respectively suspending the respective six face sheets ofthe upper buoyancy tank and the lower buoyancy tank to build the buoyancy tanks; (4) completing the assembly and welding of limiting slide slots of the upper buoyancy tank and the lower buoyancy tank, and completing the matching and drilling of connecting bolt holes of the upper buoyancy tank and the lower buoyancy tank; and (5) respectively and vertically suspending the upper buoyancy tank and the lower buoyancy tank by using a crane to leave the movable jig frame after the upper buoyancy tank and the lower buoyancy tank are approved to be qualified, and completing the separation of the upper buoyancy tank and the lower buoyancy tank in the air. The invention not only ensures the high-precision building requirements of the upper buoyancy tank and the lower buoyancy tank, but also completes the matching and drilling works of the connecting bolts of the upper buoyancy tank and the lower buoyancy tank in a section in advance.

Description

[0001] technical field : [0002] The invention relates to the technical field of ship segment manufacturing, in particular to a method for manufacturing a buoyancy tank of a semi-submersible ship. [0003] Background technique : [0004] The upper and lower pontoons of a 50,000-ton semi-submersible ship are connected by bolts. According to the design requirements, the upper and lower pontoons are often used separately. The lower pontoon is fixed on the main deck with bolts. For the convenience of hoisting, the upper and lower pontoons are fixed on the lower pontoon. The limit chute structure is designed. [0005] The traditional segmental construction method is: After the upper and lower floating tanks are built separately, the precision of the segmental construction is controlled to simulate the closing, and the connecting bolt holes of the upper and lower floating tanks are closed and then drilled on site to solve the accuracy of the bolt connection. Requirements: Ac...

AI Technical Summary

Problems solved by technology

[0005]The traditional segmental construction method is: After the upper and lower pontoon tanks are built separately, the segmental construction accuracy is controlled to simulate closure, and the upper and lower pontoon tanks are connected with bolt holes. The way of drilling on site after being closed is to meet the accuracy requirements of bolt connection; according to the working principle, the four limit chutes at the four corners of the upper and lower pontoon tanks need 0 error to achieve the fit. When the box is built in sections, it is difficult to meet the requirements if it is built with traditional section technology

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