Block assembling and carrying method of container ship cargo hold area

Abstract

The invention relates to a block assembling and carrying method for a cargo hold area of a container ship, which comprises the following steps of: respectively assembling blocks of a bottom section, a transverse bulkhead section and a broadside section and assembling the blocks of the anti-torsion box by separating an anti-torsion box from the broadside section; and a staged carrying mode is adopted when the dock is greatly folded and carried. The problems that a traditional annular block building mode is insufficient in hoisting capacity, low in construction efficiency, difficult in precision control and the like are effectively solved, the hoisting capacity of an existing gantry crane is utilized to the maximum extent, the integrity and construction efficiency of a cargo hold area are improved, the building cost is reduced, and the building period is shortened.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a method for assembling and mounting the bulkhead sections of a container ship's cargo hold area. Background Technology

[0002] The cargo hold area of ​​a container ship typically comprises sections such as the bottom, bilge, sides, and transverse bulkheads. The traditional annular modular construction method involves assembling these sections in a normal, three-dimensional annular assembly to form a complete hull along its length. However, this traditional method has the following significant drawbacks: (1) Lifting capacity limitation: The weight of the ring section of large and medium-sized container ships is large, and the lifting capacity of conventional dock cranes is difficult to meet. Large floating cranes or several gantry cranes need to be used, which is expensive and greatly affected by external environmental factors, with high safety risks and difficult to control the construction cycle.

[0003] (2) Low construction efficiency: The annular section is relatively short in the length direction of the ship, which leads to a large amount of additional work on the assembly and installation of longitudinal piping, outfitting, electrical and transverse structural butt welds, resulting in low construction efficiency.

[0004] (3) Difficulty in precision control: After the annular section is assembled, it becomes part of the complete hull. Its size is too large, and the precision control requirements are very high. Even a small deviation at the closure opening can lead to a large deviation in the overall hull. The large closure and adjustment work is difficult and costly.

[0005] (4) Poor regional integrity: Traditional methods make it difficult to achieve the integrity of pipe installation, outfitting and electrical installation, which affects the overall construction quality and efficiency.

[0006] Therefore, there is an urgent need for a new method for assembling and mounting the cargo hold sections of container ships to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a method for assembling and mounting the main sections of the cargo hold area of ​​a container ship, which maximizes the use of the lifting capacity of the gantry crane and solves the problems of large investment, difficult construction, low efficiency, and poor integrity of pipe fitting, outfitting, and electrical installation in the existing container ship cargo hold area ring sections.

[0008] The objective of this invention is achieved as follows: A method for assembling and mounting a bulkhead section of a container ship's cargo hold area includes the following: S1, segmentation; S1.1 Setting anti-torsion box sections: The anti-torsion box is separated from the side section and, together with the hatch coaming structure, is divided into an independent anti-torsion box section. The anti-torsion box sections on the port and starboard sides of the hull each include multiple anti-torsion box sections. S1.2, Setting the side sections: Set the upper boundary of the side section below the anti-torsion box section to ensure that the side ballast tank is a complete section; S1.3, Set the bottom segment: The height direction is defined at the first-level container platform, with the lower opening extending to the bottom of the hull. S1.4, Set the transverse bulkhead sections; S2. Perform overall assembly of the bottom section, transverse bulkhead section and side section respectively; S3. Then, assemble the anti-torsion box assembly. S4. During the large-scale assembly in the dry dock, first carry out the assembly of the bottom section, transverse bulkhead section and side section, and then simultaneously hoist the other bottom section, transverse bulkhead section and side section sections forward and backward for large-scale assembly. S5. Install the anti-torsion box assembly; In the longitudinal direction of the ship, several bottom sections, transverse bulkhead sections and side sections are assembled together. After reaching the length of the anti-torsion box section, the anti-torsion box section is hoisted and assembled together. After the assembly of the S6 section is completed, the construction of various systems such as pipe fitting, electromechanical systems, etc. will be carried out.

[0009] Further, in step S1.1, the division range of the anti-torsion box segment is from 500 mm above the second deck in the upper part of the hull side to the top of the hatch coaming, including the hatch coaming structure, dividing the anti-torsion box and the hatch coaming structure into an independent segment.

[0010] Furthermore, in step S1.2, the upper boundary of the side section is 500 mm above the second deck at the bottom of the anti-torsion box, that is, below the main section of the anti-torsion box, and the closure seam is 500 mm outside the ballast tank area, ensuring that the side ballast tank is a complete section, effectively guaranteeing the construction integrity of the side ballast tank, and avoiding paint damage and repeated erection and dismantling of a large amount of scaffolding work.

[0011] Furthermore, in step S1.3, the bilge segment and the bottom segment are merged and uniformly set as the bottom segment, with the inner bottom plate of the double bottom as the boundary.

[0012] Furthermore, in step S1.3, the bottom section of the cargo hold area is divided into independent bottom sections on the port and starboard sides; the bottom section on the port side of the hull is the port bottom section, and the bottom section on the starboard side of the hull is the starboard bottom section.

[0013] Furthermore, in step S1.4, the transverse bulkhead of the cargo hold area is broken laterally near the center of the ship, dividing it into independent transverse bulkhead segments on the port and starboard sides, and the break point corresponds to the break point of the bottom segment and maintains continuity; a container space structure at the bottom of the transverse bulkhead is assigned to the double bottom segment.

[0014] Furthermore, in step S2, the overall assembly of the bottom section, transverse bulkhead section, and side section adopts a normal upright assembly method, including the following steps: The bottom section of the mid-span side is used as the basis for the bottom positioning; The other bottom section was hoisted, positioned, and installed. The two transverse bulkhead sections were hoisted, positioned, and installed. The hoisting and positioning of the two side sections were carried out.

[0015] Furthermore, in step S3, the assembly work of the anti-torsion box section involves 3-4 sections in the ship's length direction, but does not exceed 2.6 times the maximum spacing between the two lifting rows of the dock gantry crane.

[0016] Furthermore, in step S3, the assembly of the anti-torsion box section adopts a normal vertical assembly method, with the two sections on both sides arranged in a mirror symmetrical manner and offset by the length of a transverse bulkhead in the ship's length direction. During the assembly stage, the anti-torsion box section completes the installation of the longitudinal hatch coaming, container column and related deck equipment and facilities on the main deck, as well as the piping, outfitting and electrical work inside the anti-torsion box.

[0017] Furthermore, the dock assembly includes the following steps: First, the baseline sections of the bottom section, transverse bulkhead section, and side section are hoisted and positioned. The remaining sections, including the bottom sections, transverse bulkhead sections, and side sections, are hoisted forward and backward. After the bottom section, transverse bulkhead section, and side section are assembled to the length of the anti-torsion box section, the anti-torsion box section is hoisted and assembled.

[0018] Compared with the prior art, the beneficial effects of the present invention are: (1) Ensure construction integrity: By setting the joint of the side section and the anti-torsion box section 500 mm above the second deck at the bottom of the anti-torsion box, the side ballast tank is ensured to be a complete section, and the joint is 500 mm outside the ballast tank area, which effectively ensures the construction integrity of the side ballast tank and avoids paint damage and repeated erection and dismantling of a large amount of scaffolding work.

[0019] (2) Optimize lifting capacity: The anti-torsion box is separated from the side section, which effectively reduces the weight of the original ring section, makes full use of the lifting capacity of the gantry crane, expands the range of ship types for which the assembly process of this section can be implemented, and improves the integrity of the cargo hold area.

[0020] (3) Improve construction efficiency: The anti-torsion box section is separated from the side section, which increases the number of sections included in the anti-torsion box section and reduces the amount of work required for the large-scale assembly of longitudinal pipes, outfitting, electrical and transverse structural butt welds, greatly improving the construction efficiency of the large-scale assembly.

[0021] (4) Improve regional integrity: The anti-torsion box section is separated from the side section, which allows the internal piping and electrical system, deck box column and various deck machinery of the anti-torsion box to be completed in large quantities during the assembly stage of the section, effectively ensuring the overall regional integrity of the deck and anti-torsion box and greatly improving construction efficiency.

[0022] (5) Facilitates precision control: The anti-torsion box section is separated from the side section. During the assembly stage, the anti-torsion box section can be used to make precision adjustments before the complete hull is formed, reducing construction difficulty, avoiding rework and waste, and improving construction efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall assembly of the present invention, consisting of the bottom section, the transverse bulkhead section, and the side section.

[0024] Figure 2 This is a three-dimensional schematic diagram of the port side anti-torsion box assembly of the present invention.

[0025] Figure 3 This is a three-dimensional schematic diagram of the starboard anti-torsion box assembly of the present invention.

[0026] in: Port bottom section 1, starboard bottom section 2, port transverse bulkhead section 3, starboard transverse bulkhead section 4, port side section 5, starboard side section 6, first port anti-torsion box section 7, second port anti-torsion box section 8, third port anti-torsion box section 9, fourth port anti-torsion box section 10, first starboard anti-torsion box section 11, second starboard anti-torsion box section 12, third starboard anti-torsion box section 13, fourth starboard anti-torsion box section 14. Detailed Implementation

[0027] To better understand the technical solution of the present invention, a detailed description will be provided below in conjunction with relevant illustrations. It should be understood that the specific embodiments described below are not intended to limit the specific implementation of the technical solution of the present invention, but are merely possible implementations of the technical solution of the present invention. It should be noted that the descriptions of the positional relationships of the components herein, such as component A being located above component B, are based on the relative positions of the components in the illustrations and are not intended to limit the actual positional relationships of the components. Example

[0028] See Figure 1-3 , Figure 1 A schematic diagram of the assembly of the overall section consisting of the bottom section, transverse bulkhead section, and side section of the present invention is shown. As illustrated, the assembly and mounting method of the overall section of a container ship cargo hold area according to the present invention includes the following: S1, segmentation; S1.1 Setting the anti-torsion box segments: From 500 mm above the second deck in the upper part of the hull side to the top of the hatch coaming, the anti-torsion box and the hatch coaming structure are divided into an independent section, namely the anti-torsion box section. In this embodiment, the anti-torsion box section on the port side of the hull includes a first port side anti-torsion box segment 7, a second port side anti-torsion box segment 8, a third port side anti-torsion box segment 9, and a fourth port side anti-torsion box segment 10, and the anti-torsion box section on the starboard side of the hull includes a first starboard side anti-torsion box segment 11, a second starboard side anti-torsion box segment 12, a third starboard side anti-torsion box segment 13, and a fourth starboard side anti-torsion box segment 14.

[0029] S1.2, Setting the side sections: The upper boundary of the side section is set 500 mm above the second deck at the bottom of the anti-torsion box, that is, below the main anti-torsion box section, and the closure joint is 500 mm outside the ballast tank area. This ensures that the side ballast tank is a complete section, effectively guaranteeing the construction integrity of the side ballast tank and avoiding paint damage and repeated erection and dismantling of a large amount of scaffolding work.

[0030] In this embodiment, the lower part of the anti-torsion box section on the port side of the hull is the port side section 5, and the lower part of the anti-torsion box section on the starboard side of the hull is the starboard side section 6.

[0031] S1.3, Set the bottom segment: The height direction is defined at the first-level container platform, with the lower end extending to the bottom of the hull; or the bilge and bottom sections are merged and uniformly defined as the bottom section, with the inner bottom plate of the double bottom as the boundary.

[0032] In this embodiment, the bottom section of the port side of the hull is called port bottom section 1, and the bottom section of the starboard side of the hull is called starboard bottom section 2.

[0033] S1.4, Setting the transverse bulkhead sections: The transverse bulkheads of the cargo hold area are divided into independent transverse bulkhead sections on both the port and starboard sides. In this embodiment, the section above the bottom section 1 on the port side is the port side transverse bulkhead section 3, and the section above the bottom section 2 on the starboard side is the starboard side transverse bulkhead section 4.

[0034] S2, Final assembly; After each section is constructed using conventional methods, the final assembly work begins.

[0035] S2.1 First, based on the bottom section of one side of the span, the foundation positioning is carried out, and the normal vertical assembly is assembled and constructed. In this embodiment, the bottom section 2 of the starboard side of the span is used as the foundation positioning. S2.2 After the positioning is completed, the hoisting, positioning and assembly of the bottom section on the other side will be carried out. In this embodiment, after the positioning of the starboard bottom section 2 is completed, the hoisting, positioning, and assembly of the port bottom section 1 are carried out. S2.3 After the bottom sections on the port and starboard sides (i.e., port bottom section 1 and starboard bottom section 2) are assembled, the two transverse bulkhead sections (i.e., port transverse bulkhead section 3 and starboard transverse bulkhead section 4) are hoisted, positioned and assembled in the final assembly. S2.4 After the bottom and transverse bulkhead sections are assembled, the hoisting and positioning of the two side sections (i.e., port side section 5 and starboard side section 6) will be carried out. Meanwhile, the assembly and joining work of the anti-torsion box sections on both sides of the cargo hold area was carried out at another site.

[0036] S3, Assembly of the anti-torsion box assembly; The assembly work of the anti-torsion box section involves 3-4 sections in the ship's length direction, but does not exceed 2.6 times the maximum spacing between the two lifting rows of the dock gantry crane; In this embodiment, the anti-torsion box section on the port side of the hull involves four sections along the length of the ship: the first port side anti-torsion box section 7, the second port side anti-torsion box section 8, the third port side anti-torsion box section 9, and the fourth port side anti-torsion box section 10. The anti-torsion box section on the starboard side of the hull involves four sections along the length of the ship: the first starboard side anti-torsion box section 11, the second starboard side anti-torsion box section 12, the third starboard side anti-torsion box section 13, and the fourth starboard side anti-torsion box section 14. S3.1. The normal upright assembly method is adopted, and the two main sections on both sides are arranged in a mirror symmetrical manner. In order to save space, the main sections on the port and starboard sides are offset by the length of a transverse bulkhead in the length direction of the ship. S3.2 During the final assembly phase, complete the installation of longitudinal hatch coamings, container columns, and related deck equipment and facilities on the main deck to ensure the integrity of the main deck area; S3.3 Simultaneously complete the piping, outfitting, and electrical work inside the anti-torsion box to ensure the integrity of the area inside the anti-torsion box.

[0037] S4, dock assembly and installation; S4.1 First, hoist the reference assembly of the bottom, transverse bulkhead, and side sections for final assembly and positioning; S4.2. Simultaneously hoist the other bottom, transverse bulkhead, and side sections forward and backward for final assembly. S4.3. Several bottom + transverse bulkhead + side sections are assembled in the length direction of the ship. After reaching the length of the anti-torsion box section, the anti-torsion box section is hoisted and assembled. S4.4 After the main assembly work is completed, the construction work of various systems such as pipe fitting, electromechanical systems, etc. will be carried out.

[0038] Specific implementation examples: Taking a dual-fuel container ship project as an example, the following significant results were achieved: 1. The overall weight is reduced by about 30%, making full use of the existing lifting capacity of the gantry crane; 2. The workload of large-scale assembly is reduced by approximately 25%, and construction efficiency is increased by approximately 20%; 3. The integrity of the area has been significantly improved, with the outfitting and electrical work in the deck and anti-torsion box areas reaching over 90% completion; 4. Construction precision control is more convenient, and the rework rate is reduced by approximately 15%; 5. Overall construction costs are reduced by approximately 10%, and the construction period is shortened by approximately 12%.

[0039] In summary, this invention discloses a method for assembling and mounting the main sections of a container ship's cargo hold area. This method separates the anti-torsion box from the side sections, assembling the main sections (bottom, transverse bulkhead, and side sections) and the main anti-torsion box section separately, and employs a phased mounting approach during the final assembly in the dry dock. This invention effectively solves the problems of insufficient lifting capacity, low construction efficiency, and difficulty in precision control inherent in traditional ring-shaped main section construction methods. It maximizes the lifting capacity of existing gantry cranes, improves the integrity and construction efficiency of the cargo hold area, and reduces construction costs and time.

[0040] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformations or equivalent substitutions fall within the scope of protection of the present invention.

Claims

1. A method for assembling and mounting sections of a container ship's cargo hold area, characterized in that, Includes the following: S1, segmentation; S1.1 Setting anti-torsion box sections: The anti-torsion box is separated from the side section and, together with the hatch coaming structure, is divided into an independent anti-torsion box section. The anti-torsion box sections on the port and starboard sides of the hull each include multiple anti-torsion box sections. S1.2, Setting the side sections: Set the upper boundary of the side section below the anti-torsion box section to ensure that the side ballast tank is a complete section; S1.3, Set the bottom segment: The height direction is defined at the first-level container platform, with the lower opening extending to the bottom of the hull. S1.4, Set the transverse bulkhead sections; S2. Perform overall assembly of the bottom section, transverse bulkhead section and side section respectively; S3. Then, assemble the anti-torsion box assembly. S4. During the large-scale assembly in the dry dock, first carry out the assembly of the bottom section, transverse bulkhead section and side section, and then simultaneously hoist the other bottom section, transverse bulkhead section and side section sections forward and backward for large-scale assembly. S5. Install the anti-torsion box assembly; In the longitudinal direction of the ship, several bottom sections, transverse bulkhead sections and side sections are assembled together. After reaching the length of the anti-torsion box section, the anti-torsion box section is hoisted and assembled together. After the assembly of the S6 section is completed, the construction of various systems such as pipe fitting, electromechanical systems, etc. will be carried out.

2. The assembly and mounting method of the cargo hold area of ​​a container ship according to claim 1, characterized in that: In step S1.1, the division range of the anti-torsion box section is from 500 mm above the second deck in the upper part of the hull side to the top of the hatch coaming, including the hatch coaming structure, dividing the anti-torsion box and the hatch coaming structure into an independent section.

3. The assembly and mounting method of the cargo hold area of ​​a container ship according to claim 1, characterized in that: In step S1.2, the upper boundary of the side section is 500 mm above the second deck at the bottom of the anti-torsion box, that is, below the main section of the anti-torsion box, and the closure seam is 500 mm outside the ballast tank area, ensuring that the side ballast tank is a complete section, effectively guaranteeing the construction integrity of the side ballast tank, and avoiding paint damage and repeated erection and dismantling of a large amount of scaffolding work.

4. The assembly and mounting method of the cargo hold area of ​​a container ship according to claim 1, characterized in that: In step S1.3, the bilge segment and the bottom segment are merged and uniformly set as the bottom segment, with the inner bottom plate of the double bottom as the boundary.

5. The assembly and mounting method of the cargo hold area of ​​a container ship according to claim 1, characterized in that: In step S1.3, the bottom section of the cargo hold area is divided into independent bottom sections on the port and starboard sides; the bottom section on the port side of the hull is the port bottom section, and the bottom section on the starboard side of the hull is the starboard bottom section.

6. The assembly and mounting method of the cargo hold area of ​​a container ship according to claim 1, characterized in that: In step S1.4, the transverse bulkhead of the cargo hold area is broken laterally near the center of the ship, dividing it into independent transverse bulkhead sections on the port and starboard sides, and the break point corresponds to the break point of the bottom section and maintains continuity; the structure of a container space at the bottom of the transverse bulkhead is assigned to the double bottom section.

7. The assembly and mounting method of the cargo hold area of ​​a container ship according to claim 1, characterized in that: In step S2, the overall assembly of the bottom section, transverse bulkhead section, and side section adopts a normal upright assembly method, including the following steps: The bottom section of the mid-span side is used as the basis for the bottom positioning; The other bottom section was hoisted, positioned, and installed. The two transverse bulkhead sections were hoisted, positioned, and installed. The hoisting and positioning of the two side sections were carried out.

8. The assembly and mounting method of the cargo hold area of ​​a container ship according to claim 1, characterized in that: In step S3, the assembly work of the anti-torsion box section involves 3-4 sections in the ship's length direction, but does not exceed 2.6 times the maximum spacing between the two lifting racks of the dock gantry crane.

9. The assembly and mounting method of the cargo hold area of ​​a container ship according to claim 1, characterized in that: In step S3, the anti-torsion box section is assembled using a normal vertical assembly method, with the two sections on both sides arranged in a mirror-symmetrical manner and offset by the length of a transverse bulkhead along the ship's length. During the assembly stage, the anti-torsion box section completes the installation of the longitudinal hatch coamings, container columns, and related deck equipment and facilities on the main deck, as well as the piping, outfitting, and electrical work inside the anti-torsion box.

10. The assembly and mounting method of the cargo hold area of ​​a container ship according to claim 1, characterized in that: The dock assembly and installation includes the following steps: First, the baseline sections of the bottom section, transverse bulkhead section, and side section are hoisted and positioned. The remaining sections, including the bottom sections, transverse bulkhead sections, and side sections, are hoisted forward and backward. After the bottom section, transverse bulkhead section, and side section are assembled to the length of the anti-torsion box section, the anti-torsion box section is hoisted and assembled.

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