Upper upright column turnover device and method for marine crane

Abstract

The invention provides an upper upright column turnover device and method for a marine crane. The upper upright column turnover device comprises two turnover parts and a turnover support, wherein the turnover parts are symmetrically mounted on two sides at the tail part of an upper upright column and each turnover part comprises a rotating shaft; the turnover support comprises a base and two vertical plates, the vertical plates are perpendicularly fixed on the base and notches are formed in the upper ends of the vertical plates; the two rotating shafts of the two turnover parts are correspondingly inserted into the notches, so that the upper upright column can rotate around the turnover support. The method for turning over the upper upright column by using the upper upright column turnover device comprises the following steps: step 1) fixing the turnover support on a platform, and lifting the upper upright column which is horizontally placed onto the turnover support by a lifter to enable the rotating shafts to correspond to the notches of the vertical plates; step 2) enabling the upper upright column to rotate around the rotating shafts by the lifter till the upper upright column is nearly upright; step 3) detaching the upper upright column from the turnover support and vertically hoisting the upper upright column; step 4) moving the lifter to mount the upper upright column onto the base.

Description

technical field [0001] The invention relates to the installation of a large-scale marine crane, and in particular discloses a flipping device and a flipping method for an upper column of a marine crane. Background technique [0002] see figure 1 , a deep-sea semi-submersible platform 10 is equipped with two large-scale mast spreaders, which can be mainly divided into three parts: the base 11, the upper column 12, and the boom 13; these three parts are constructed by the manufacturer and transported to the installation place for assembly and commissioning. [0003] The upper column 12 of the spreader is a slender conical shape, with a weight of more than 300t, a height of more than 40m, and a diameter of more than 7m. It is generally laid down horizontally during construction, and it is turned upside down and closed with the base 11 during installation. . [0004] Conventional slender conical flip erection methods include two: [0005] 1) Due to the large length and weigh...

AI Technical Summary

Problems solved by technology

This solution needs to lay slides on the construction site in advance, increasing the amount of construction; and during the turning process, the slippage of the turned objects on the slides is not easy to control, which may cause a sudden change in the center of gravity of the objects, which will have a negative impact on the spreader and cause operational risks

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