Ship hull sectional turn-over method and special-purpose rolling rack

Abstract

The invention discloses a method for sectional turning the ship and special rolling bracket, comprising: (1) each side edge of one end of section has one arc rolling bracket while its axis is parallel to the sectional turning surface; (2) the invention uses the crane to hang the another end of section to turn the section for 180 degrees along the arc surface of rolling bracket to complete the sectional turning. The inventive special rolling bracket has a round arc surface and a connection plate arranged on the chord of round arc and connected to the section via connection hole. Compared to present technique, the invention can fully utilize the lifting ability of crane while the section weight can be two times of the section weight turned by two crane; since the section is large, the number of sections is fewer, the closing quality of ship is confirmed, and the period of building ship can be shorted; since the section is turned by the support of rolling bracket, it has better support condition, reliable safety, simple operation, and fast turning speed.

Description

【Technical field】 [0001] The invention relates to the field of shipbuilding, in particular to a method for turning over the hull in sections during the hull building process and a special rolling frame. 【Background technique】 [0002] During the construction of the hull, because the hull is built by the segmented reflexive construction method, when some sections of the hull are built, they need to be turned over before they can be hoisted to the berth for the large closure of the hull. In the prior art, general small and medium-sized shipyards now adopt the crane combined turnover method to carry out segmental turnover operations. That is: according to the size and weight of the segment, use two cranes (or one crane and one truck crane, or one crane and two truck cranes) to lift the segment at both ends, and then loosen the cable at one end of the crane, and The section is only hung by the crane at the other end, and then the section is turned 180°, and the original crane i...

AI Technical Summary

Problems solved by technology

Some problems exist when the above-mentioned methods turn over in sections, such as: the size of the sections is limited, because when dividing the sections, it must first be considered that the size of the sections cannot exceed the lifting capacity required by the turning process, and the sectioned The weight meets the load that can be carried by one crane, not only the existing lifting capacity cannot be fully utilized, but also because of the small division of sections, the workload of closing the berth in sections is large, the quality is not guaranteed, and the construction period of the berth is long , this is the bottleneck problem of shipbuilding, and it is an urgent problem to be solved by shipyards at home and abroad

In addition, this method is poor in safety, and it is easy to cause wrinkles in the segmented or segmented local structure during the lifting process

Moreover, it takes a long time to turn over in sections. Since two cranes are needed to lift together, two cranes are occupied in the whole process, which affects other work that needs to be lifted, and the economy is not good.

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