Underwater folding method for half ships

A hull and dock technology, applied in the field of precision control of half-ship closing, can solve problems such as heavy weight and inapplicability, and achieve the effects of ensuring safety, saving costs, and saving core resources

Inactive Publication Date: 2012-06-13
CSSC HUANGPU WENCHONG SHIPBUILDING COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the heavy weight of the half-ship of a large ship, the conventional hoisti

Method used

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  • Underwater folding method for half ships

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A half-ship underwater closing method, the following steps are used to complete:

[0046] 1) if figure 1 As shown, the two halves of the ship are carried and built independently in the dock, and the data of the half of the ship’s end surface (such as Figure 8 shown) as a basis to carry the other half of the ship, so that the same plane of the closing mouth of the two halves of the ship meets the requirements;

[0047] 2) Draw the baseline of the whole ship at the pre-closed dock position, and arrange half dock piers at the height of this baseline;

[0048] 3) Arrange the precision measuring instrument 3 on the dock wall and dock door, and mark the captain mark and the center line of the hull behind the pier;

[0049] 4) Arrange the hanging codes and guide plates 7 installed on the outer plates of the half-hulls, the light targets attached to the outer plates of the half-hulls, and the pullers 5 installed on the dock wall tracks, and installed on the inner walls of th...

Embodiment 2

[0059] A half-ship underwater closing method, the following steps are used to complete:

[0060] 1) if figure 1 As shown, the two halves of the ship are built independently in the dock. When the half ships are carried separately, steel docking piers are used in the center longitudinal keel area to prevent the uneven sinking of the pier due to the uneven weight of the hull during the loading process. Guarantee the accuracy requirements of the baseline of the bottom of the ship after closing; Figure 8 shown) as the basis to carry the other half of the ship, so that the same plane of the closing mouth of the two halves of the ship is within the range of ±8mm;

[0061] 2) Draw the baseline of the whole ship at the pre-closed dock position, and arrange half dock piers at the height of this baseline, and arrange steel dock piers on the nearest row of dock piers on both sides of the closing port to reduce the pitch of the pier due to the trimming of the half ship. The influence of...

Embodiment 3

[0073] A half-ship underwater closing method, the following steps are used to complete:

[0074] 1) if figure 1 As shown, the two halves of the ship are built independently in the dock. When the half ships are carried separately, steel docking piers are used in the center longitudinal keel area to prevent the uneven sinking of the pier due to the uneven weight of the hull during the loading process. Guarantee the accuracy requirements of the baseline of the bottom of the ship after closing; Figure 8 shown) as the basis to carry the other half of the ship, so that the same plane of the closing mouth of the two halves of the ship is within the range of ±8mm;

[0075] 2) Draw the baseline of the whole ship at the pre-closed dock position, and arrange half dock piers at the height of this baseline, and arrange steel dock piers on the nearest row of dock piers on both sides of the closing port to reduce the pitch of the pier due to the trimming of the half ship. The influence of...

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Abstract

The invention relates to an underwater folding method for half ships, which belongs to the field of ship building installation and solves the problem that conventional lifting and a method of utilizing a cart to move a ship cannot be suitable for folding two independently built half ships which are provided with independent reference lines. The underwater folding method for the half ships utilizes self weight of the half ships and difference of the buoyancy center, the half ships are docked successively when a dock drains water outwards, the half ship docked later is docked with the half ship placed on the pier first to serve as the standard, the fact that the distance between slits of a folding opening after docking is within a welding slit range allowed by the standard is guaranteed so that underwater docking of the half ships is finished; or a standard half ship is enabled not to float by the methods of ballasting, cabin breaking and the like, and after other half ships completely float, the other half ships are moved to a folding station to perform docking and folding, and ultimately the precision requirements of a principal dimension, a reference line precision, slits of the folding opening and the like are met after all the half ships are docked. The underwater folding method for the half ships effectively saves dock crane resources, is high in safety during the operation process, is simple and practical, and can be widely applied to various producing processes of large ships.

Description

technical field [0001] The invention relates to a ship construction and installation technology, in particular to a precision control method for half-ship closing. Background technique [0002] In shipbuilding, the shipbuilding cycle is an important reflection of a shipyard's construction capability, and it is also an important indicator for measuring and delivering ships and realizing economic benefits. The most direct way to shorten the ship construction cycle is to shorten the berth or dock cycle. Modern large-scale shipyards generally adopt dock assembly, and improving the utilization rate of docks, that is, increasing the number of docks is the first to bear the brunt of the bottleneck that shipyards need to break through. Modern large-scale shipyards generally face the problems of many types of ships and short construction periods. Dividing the whole ship into two and a half ships can effectively improve the utilization rate of the dock, and is conducive to the balanc...

Claims

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Application Information

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IPC IPC(8): B63B9/06
Inventor 何琎
Owner CSSC HUANGPU WENCHONG SHIPBUILDING COMPANY
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