Lengthening reform technology of ship

Abstract

A reforming technology of ship for elongating ship body includes such steps as segmental cutting, segmental displacement and segmental splicing. After the ship body is segmentally cut off, a segment is fixed in dock, and other segments floating on water are drawn to it for welding them together.

Description

technical field [0001] The invention relates to a ship refitting process, in particular to a ship lengthening and refitting process, which belongs to the technical field of ship repair and construction. Background technique [0002] At present, the world shipping market is unprecedentedly prosperous. Many shipowners want to build ships to seek more economic benefits. To increase the operating capacity, the only way to enlarge and lengthen the old ship is a contingency move by many shipowners, and it has directly led to a sharp increase in the number of refitted ships, because ship lengthening technology is the most representative and most difficult part of ship refitting A technology that has both shipbuilding technology and ship repair technology, but is superior to both, especially the lengthening of container ships that require high precision is more difficult, so while providing economic benefits to shipyards, it is also A problem for the shipyard. [0003] The traditi...

AI Technical Summary

Problems solved by technology

[0003] The traditional process of lengthening the ship is to cut the ship and use a tractor to pull one section apart. After lengthening the middle section, use a trolley to pull it back and close it. This method is called the pulling method, although the pulling method has hundreds of years of history. The history and technology are relatively mature, but there are still the following deficiencies: ①The pulling force required is very large, and the ships that can be pulled at present are all below 3,000 tons of deadweight; ②The deviation correction is not easy, and the accuracy is greatly limited. Pulling trolleys and pulley blocks, the directional pull of the track cannot be corrected for deviation, and the deviation of the ship when it is sitting on the pier is also very large, so the error after docking is relatively large, which is not suitable for the refitting of container ships with high precision requirements; ③The whole process The operation is more complicated and the cycle is longer

In foreign countries, for the process of refitting large-tonnage container ships, powerful large shipyards use a super-large flatbed truck, which can carry 2,000 tons of sections. There is no technical problem, but the cost is expensive, and the weight of sections More than 2,000 tons, they are helpless

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