A reinforcement method for torsion box sections of large container ships

Abstract

The present invention relates to a reinforcement method for a torsion box segment of a large container ship. The method is suitable for temporary reinforcement during the construction of the torsion box segment, and the purpose is to reduce the deformation during the construction and assembly of the torsion box segment and ensure the overall accuracy of the segment. The reinforcement method uses #20 channel steel as a reinforcement material during the construction of the torsion box segment to reinforce the free edge of the segment port. The present invention includes the steps of cutting the reinforcement material, installing the reinforcement material, and cutting the reinforcement material. The present invention is conducive to reducing the deformation during the construction and assembly of the segment. At the same time, since the reinforcement material uses #20 channel steel, cutting, installation and recycling are very convenient, which reduces labor costs, reduces material loss, and increases production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of shipbuilding, and in particular to a method for reinforcing a torsion box segment of a large container ship. Background Art

[0002] As the tonnage of large container ships increases, the size and thickness of the torsion box sections are also increasing to ensure the overall torsional strength of the ship, which will inevitably make it more difficult to control the accuracy of the sections. The traditional practice is to set up a temporary false bulkhead 200mm away from the joint of the torsion box section port. When making false bulkheads, it is necessary to cut steel plates of different sizes according to the size of the sections, and openings need to be made on the steel plates. The position of the openings corresponds to the position of the profiles on the sections. During the final installation, it is necessary to ensure that the profiles pass through the openings, and the accuracy requirements are high. Therefore, the false bulkheads are complicated to cut, difficult to install and dismantle, and have a low recycling rate. There is serious waste and loss of materials, and the labor cost required is high. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a method for strengthening the torsion box segment of a large container ship, which reduces the deformation of the torsion box segment during construction and assembly and ensures the overall accuracy of the segment. The technical objectives of the present invention are achieved through the following technical solutions:

[0004] A method for strengthening a torsion box section of a large container ship, the method comprising the following steps:

[0005] S1. Cutting channel steels of different lengths according to the sizes of each assembly of the torsion box;

[0006] S2. Install and weld the channel steel on each assembly;

[0007] S3, closing the various assemblies of the torsion box to form torsion box segments, and welding the intersections of the channel steels of the various assemblies;

[0008] S4. After the torsion box segment ports are butt-welded with other segments, the channel steel is removed. When removing, the entire channel steel can be cut off directly with an oxyacetylene cutter.

[0009] Furthermore, in S1, the length of the channel steel shall not be greater than the width of the assembly to which it belongs.

[0010] Further, in S2, the channel steel is placed at least at one end of the assembly, and the channel steel is installed 100-300 mm away from the assembly port.

[0011] Furthermore, in S3, the assembly of the torsion box segments includes a main deck assembly, an outer plate assembly, an inner shell plate assembly and a platform plate assembly, the inner shell plate assembly and the outer plate assembly are distributed up and down, and the main deck assembly and the platform plate assembly are respectively placed on both sides of the outer plate assembly.

[0012] Furthermore, the channel steel a on the main deck assembly, the channel steel b on the outer plate assembly and the channel steel c on the inner shell plate assembly are all installed on the frame surface profiles of the assembly; the channel steel d on the platform plate assembly is installed on the smooth surface of the platform plate assembly.

[0013] Furthermore, when the distance between the channel steel a on the main deck assembly and the channel steel d on the platform plate assembly is greater than 6000mm, it is necessary to add a channel steel e between the channel steel a on the main deck assembly and the channel steel d on the platform plate assembly; one end of the channel steel e is welded to the inner shell plate assembly, and the other end is welded to the outer plate assembly, and the intersection of the channel steel e and the channel steel c and the intersection of the channel steel e and the channel steel b are welded and fixed.

[0014] Furthermore, one end of channel steel a is connected to the outer plate assembly, and the other end is connected to the inner shell plate assembly; one end of channel steel d is connected to the outer plate assembly, and the other end is connected to the inner shell plate assembly; one end of channel steel c is connected to the main deck assembly, and the other end is connected to the platform plate assembly; one end of channel steel b is connected to the main deck assembly, and the other end is connected to the platform plate assembly.

[0015] Furthermore, the welding at the intersection of the channel steels and the welding between the channel steels and each assembled part are all carried out by carbon dioxide gas shielded welding.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The setting of channel steel can effectively control the deformation of the torsion box segment during the construction and assembly process;

[0018] 2. The setting of channel steel replaces the production and installation of traditional false bulkheads. Compared with the production and installation of false bulkheads, the use of channel steel reduces the production cost and is easy to produce. The required length can be directly cut. The installation accuracy requirements are low and the operation is convenient.

[0019] 3. The channel steel can be reused after being removed, but once the steel plates used for traditional false bulkheads are cut, it is difficult to use them again for segmented reinforcement of the torsion box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the installation of each assembly of the torsion box.

[0021] Figure 2 It is a cross-sectional view of the segmented reinforcement of the torsion box.

[0022] In the figure, 1. main deck assembly; 2. outer plate assembly; 3. inner shell plate assembly; 4. platform plate assembly; 5. channel steel a; 6. channel steel b; 7. channel steel c; 8. channel steel d; 9. channel steel e; 10. frame surface profile. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with specific embodiments:

[0024] A method for strengthening a torsion box section of a large container ship, the method comprising the following steps:

[0025] S1. Cutting channel steels of different lengths according to the sizes of each assembly of the torsion box, with at least one channel steel on each assembly;

[0026] S2. Install and weld the channel steel on each assembly. The channel steel should be placed at least at one end of the assembly. The channel steel can be installed at a distance of 100-300mm from the assembly port.

[0027] S3, folding the assemblies of the torsion box to form a torsion box segment, and welding the intersections of the channel steels of each assembly; the assembly of the torsion box segment includes the main deck assembly 1, the outer plate assembly 2, the inner shell assembly 3 and the platform plate assembly 4, the inner shell assembly 3 and the outer plate assembly 2 are distributed up and down, and the main deck assembly 1 and the platform plate assembly 4 are respectively placed on both sides of the outer plate assembly 2; Figure 1 As shown, the channel steel a5 on the main deck assembly 1, the channel steel b6 on the outer plate assembly 2 and the channel steel c7 on the inner shell plate assembly 3 are all installed on the frame surface profile 10 of the assembly; the channel steel d8 on the platform plate assembly 4 is installed on the smooth surface of the platform plate assembly 4; one end of the channel steel a5 is connected to the outer plate assembly 2, and the other end is connected to the inner shell plate assembly 3; one end of the channel steel d8 is connected to the outer plate assembly 2, and the other end is connected to the inner shell plate assembly 3; one end of the channel steel c7 is connected to the main deck assembly 1, and the other end is connected to the platform plate assembly 4; one end of the channel steel b6 is connected to the main deck assembly 1, and the other end is connected to the platform plate assembly 4;

[0028] When the distance between the channel steel a5 on the main deck assembly 1 and the channel steel d8 on the platform plate assembly 4 is greater than 6000mm, it is necessary to add a channel steel e9 between the channel steel a5 on the main deck assembly 1 and the channel steel d8 on the platform plate assembly 4; one end of the channel steel e9 is welded to the inner shell plate assembly 7, and the other end is welded to the outer plate assembly 2. The intersection of the channel steel e9 and the channel steel c7 and the intersection of the channel steel e9 and the channel steel b6 are welded and fixed. Figure 2 shown.

[0029] S4. After the torsion box segment ports are butt-welded with other segments, the channel steel is removed. When removing, the entire channel steel can be cut off directly with an oxyacetylene cutter.

[0030] In the method of the present invention, when welding the intersection of the channel steel and the connection between the channel steel and the assembly, carbon dioxide gas is used for shielded welding. The channel steels used in the present invention are all #20 steel.

[0031] This embodiment is only a further explanation of the present invention, not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it will be protected by the patent law.

Claims

1. A method for strengthening the torsion box segment of a large container ship, characterized in that: The method comprises the following steps: S1. Cutting channel steels of different lengths according to the sizes of each assembly of the torsion box; S2. Install and weld the channel steel on each assembly. The channel steel is placed at least at one end of the assembly. The channel steel is installed 100-300mm away from the assembly port. S3, closing the various assemblies of the torsion box to form torsion box segments, and welding the intersections of the channel steels of the various assemblies; The assembly of the torsion box segments includes the main deck assembly, the outer plate assembly, the inner shell plate assembly and the platform plate assembly. The inner shell plate assembly and the outer plate assembly are arranged up and down, and the main deck assembly and the platform plate assembly are respectively placed on both sides of the outer plate assembly. The channel steel a on the main deck assembly, the channel steel b on the outer plate assembly and the channel steel c on the inner shell assembly are all installed on the frame surface profile of the assembly; the channel steel d on the platform plate assembly is installed on the smooth surface of the platform plate assembly; when the distance between the channel steel a on the main deck assembly and the channel steel d on the platform plate assembly is greater than 6000mm, it is necessary to add a channel steel e between the channel steel a on the main deck assembly and the channel steel d on the platform plate assembly; one end of the channel steel e is welded to the inner shell plate assembly, and the other end is welded to the outer plate assembly, and the intersection of the channel steel e and the channel steel c and the intersection of the channel steel e and the channel steel b are welded and fixed; One end of the channel steel a is connected to the outer plate assembly, and the other end is connected to the inner shell assembly; one end of the channel steel d is connected to the outer plate assembly, and the other end is connected to the inner shell assembly; one end of the channel steel c is connected to the main deck assembly, and the other end is connected to the platform plate assembly; one end of the channel steel b is connected to the main deck assembly, and the other end is connected to the platform plate assembly; S4. After the torsion box segment ports are butt-welded with other segments, the channel steel is removed.

2. A method for strengthening a torsion box segment of a large container ship according to claim 1, characterized in that: In S1, the length of the channel steel shall not be greater than the width of the assembly to which it belongs.

3. A method for strengthening a torsion box segment of a large container ship according to claim 1, characterized in that: The welding at the intersection of the channel steels and the welding between the channel steels and each assembled part are all carried out by carbon dioxide gas shielded welding.

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