A U-shaped construction method for segmented funnels of large container ships

Abstract

This invention relates to a "U"-shaped construction method for segmented chimneys of large container ships. Based on the arrangement characteristics of the outfitting components within the segment, the construction base surface for each segment is determined. Then, the internal platform assembly, columns, left bulkhead assembly, and right bulkhead assembly are installed sequentially, followed by the installation of the top platform assembly, forming a "U"-shaped structural frame. At this stage, the outfitting components are pre-assembled layer by layer. After the pre-assembly is complete, the forward bulkhead assembly is installed, forming a complete chimney segment. This invention solves the problem of difficult installation of outfitting components in chimney segments, reduces on-site construction difficulty, improves outfitting integrity, and shortens the construction cycle of chimney segments. This method is suitable for the construction of large, structurally weak, and difficult-to-outfit chimney segments.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding, and in particular to a "U"-shaped construction method for the chimney sections of large container ships. Background Technology

[0002] For chimney sections equipped with desulfurization devices, the internal structure is very weak, consisting only of a large open platform and a few columns. The outfitting of large equipment such as scrubbing towers and exhaust pipes occupies a large amount of space and is arranged in a complex manner. If pre-installation is carried out after the sections are formed, not only will the workload be large, but the construction will also be more difficult. In particular, the large exhaust pipes inside the sections are large in size and have many lines, which no longer meet the conditions for pulling them in from the large opening at the bottom after the sections are formed.

[0003] In the prior art, Chinese invention patent 201010298398.3 discloses a method for constructing a segmented ship chimney. The chimney segment includes a chimney unit and a segmented structure. The chimney unit is constructed vertically, and the segmented structure is constructed horizontally. After the segmented structure is completed, it is flipped and hoisted onto the chimney unit from top to bottom. Then, the bent pipe end extending out of the chimney is installed to form a complete ship chimney segment. This application is applicable to the construction of large oil tankers, but it is not applicable to the chimney segment of the large container ship in this application. At the same time, this application does not disclose a method for installing large exhaust pipes. Summary of the Invention

[0004] In actual shipbuilding processes, due to the numerous temporary reinforcements within sections and the full erection of scaffolding, interference frequently occurs between the installation of large components such as exhaust pipes and temporary parts. In particular, the frequent re-erection and dismantling of scaffolding severely impacts construction efficiency. To improve the pre-assembly efficiency of piping systems / outfitting components, enhance section integrity, and shorten the overall assembly cycle, the large container ship FU02C adopts a "U"-shaped construction method for its chimney sections. The purpose of this invention is to solve the problem of difficult installation of outfitting components in chimney sections.

[0005] A method for constructing a U-shaped chimney section for a large container ship, wherein the chimney section includes the erection of a forward bulkhead, an aft bulkhead, a port bulkhead, a starboard bulkhead, an internal platform, and a top platform, as well as pre-installed iron outfitting components inside the section, wherein the erection of the aft bulkhead, port bulkhead, starboard bulkhead, and top platform forms a U-shaped structural frame. The construction method includes the following steps:

[0006] S1, the chimney section is constructed in a horizontal position. Based on the arrangement characteristics of the outfitting components inside the chimney section, the rear bulkhead assembly is determined as the construction base surface of the chimney section, and the frame on the construction base surface is laid with boards.

[0007] S2, On the aft bulkhead assembly, install the internal platform assembly and columns of the chimney segment, and arrange anti-tilt bracing as needed;

[0008] S3, install the left and right bulkhead assemblies on both sides of the aft bulkhead assembly. The bottom of the left and right bulkhead assemblies is connected to the two sides of the aft bulkhead assembly to form a frame platform. To prevent the frame platform structure from deforming, precision reinforcement is provided at the edges of the left and right bulkhead assemblies.

[0009] S4, install the top platform assembly located at the top of the chimney section. At this time, the "U" shaped structural frame of the chimney section is formed by the assembly of the rear bulkhead, the left enclosure, the right enclosure, and the top platform.

[0010] S5, Install outfitting components within the “U”-shaped structural frame. The pre-installation of the outfitting components is carried out by erecting scaffolding layer by layer from bottom to top. The scaffolding is erected layer by layer according to the installation progress of the outfitting components.

[0011] S6. After the outfitting components within the “U”-shaped structural frame are fully installed, the front bulkhead is flipped over and welded to form a complete container ship chimney section.

[0012] A further preferred technical solution is that the outfitting components include an iron outfitting platform, a generator exhaust pipe and support, a generator scrubbing tower exhaust pipe and support, and a main unit exhaust pipe and support.

[0013] A further preferred technical solution is that, in step S2, anti-tilt bracing is arranged at the assembly point of the internal platform. The anti-tilt bracing needs to avoid interference with the outfitting components installed subsequently, and is arranged on the non-structural surface of the internal platform assembly.

[0014] A further preferred technical solution is that the anti-tilt brace in step S2 and the precision enhancement in step S3 are determined by three-dimensional software simulation. The complete models of the segmented structure and outfitting components are retrieved in the three-dimensional software, and then the models of the anti-tilt brace and precision enhancement are established. The newly created model will not interfere with the retrieved model.

[0015] A further preferred technical solution, in step S5, involves the installation method of the outfitting components within the "U"-shaped structural frame of the chimney segments. In this stage, the corresponding iron outfitting platform is fully installed, and the generator exhaust pipe and its support, the generator scrubber tower exhaust pipe and its support, and the main unit exhaust pipe and its support are respectively hoisted into place. This includes the following steps:

[0016] S51, Install the first layer of outfitting components; no scaffolding is required at this stage.

[0017] S52, begin installing the iron outfitting platform and exhaust pipe. The first layer of scaffolding can be erected as the installation progresses. Due to the large volume and complex structure of the generator pipe, it is installed in three layers in sequence. At this time, the first layer of scaffolding with a height of 2.3-2.5m is installed.

[0018] S53, Install the second-layer generator exhaust pipe and its support. Erect the second-layer scaffolding to a height of 4.6-4.8m as installation progresses;

[0019] S54, hoist the generator washing tower exhaust pipe, and install the corresponding iron outfitting platform and ladder;

[0020] S55, hoist the main unit exhaust pipe and its support. Due to the segmented horizontal construction, temporary supports need to be arranged on the main unit exhaust pipe. Note that some main unit exhaust pipes can be installed vertically in the main section stage. In order to control the weight of the section, they can be temporarily not installed in the section stage.

[0021] S56, install the third-layer generator exhaust pipe and its support, and at the same time complete the installation of the iron outfitting platform that can be installed in the section. As the installation progresses, erect the third layer of scaffolding, which is 6.9-7.1m high. The process reinforcement at the bottom of the section can be installed at this time.

[0022] A further preferred technical solution involves step S6, where, after the outfitting components are fully pre-assembled, the forward bulkhead assembly is flipped over and installed to form a complete section. The forward bulkhead assembly requires segmented outfitting, meaning that the corresponding small pipes and supports are fully installed during the forward bulkhead assembly construction phase. The segmented outfitting installation method is as follows:

[0023] S61, with the forward bulkhead as the base, the frame is laid with plates, and longitudinal ribs are welded to form the forward bulkhead assembly;

[0024] S62, install pipes and supports that can be fixed on the forward bulkhead assembly. The pipes involved in the segmented outfitting should not be too heavy to avoid affecting the hoisting and turning of the forward bulkhead assembly.

[0025] Compared with existing technologies, the "U"-shaped construction method for segmented chimneys of the present invention has the following advantages:

[0026] (1) The “U”-shaped construction method for the chimney section of a large container ship of the present invention is applicable to chimney sections of different ship types that are large in size, weak in structure and difficult to outfitt, and has strong versatility.

[0027] (2) The present invention provides a “U”-shaped construction method for the segmented chimney of a large container ship, which reduces the difficulty of outfitting and installation, facilitates on-site construction, ensures the integrity of the segmented outfitting, shortens the segmented construction cycle, and improves construction efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the aft bulkhead assembly structure for a "U"-shaped construction method of segmenting the chimney of a large container ship.

[0030] Figure 2 This diagram illustrates the assembly of the internal platform and columns for installing the chimney sections on the aft bulkhead of a "U"-shaped construction method for chimney sections of a large container ship.

[0031] Figure 3 A schematic diagram showing the connection of the aft bulkhead, port bulkhead, and right bulkhead assembly in a "U"-shaped construction method for segmenting the chimney of a large container ship.

[0032] Figure 4 A schematic diagram of a U-shaped frame platform for a U-shaped construction method of segmenting the chimney of a large container ship.

[0033] Figure 5 A schematic diagram showing the installation of reinforcement within a U-shaped structural frame, illustrating a U-shaped construction method for segmented chimneys of large container ships.

[0034] Figure 6 This is a schematic diagram of the installation of outfitting components within a U-shaped structural frame, illustrating a U-shaped construction method for segmented chimneys of large container ships.

[0035] Figure 7 This diagram illustrates the assembly of the forward bulkhead and the closing of the U-shaped structural frame in a U-shaped construction method for segmenting the chimney of a large container ship.

[0036] Figure 8 This is a schematic diagram of the segmented outfitting of the forward bulkhead assembly, which is part of a "U"-shaped construction method for segmenting the funnel of a large container ship.

[0037] Numbering on the map:

[0038] 1-Aft bulkhead assembly, 2-Internal platform assembly, 3-Column, 4-Left bulkhead assembly, 5-Right bulkhead assembly, 6-Top platform assembly, 7-Anti-tilt brace, 8-Precision reinforcement, 9-Iron outfitting platform, 10-Generator exhaust pipe, 11-Generator scrubber tower exhaust pipe, 12-Main engine exhaust pipe, 13-Process reinforcement, 14-Forward bulkhead assembly, 15-Small pipes and supports. Detailed Implementation

[0039] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0041] During actual construction, due to numerous temporary internal reinforcements and full scaffolding, interference frequently occurred between the installation of large components such as exhaust pipes and temporary parts. In particular, the repeated erection and dismantling of scaffolding was frequent, severely impacting construction efficiency. To improve the pre-assembly efficiency of piping / outfitting components, enhance section integrity, and shorten the overall assembly cycle, the large container ship FU02C adopted a "U"-shaped construction method for its chimney sections.

[0042] This invention discloses a U-shaped construction method for a large container ship's chimney segment. The chimney segment includes a forward bulkhead assembly 14, an aft bulkhead assembly 1, a left bulkhead assembly 4, a right bulkhead assembly 5, an internal platform assembly 2, and a top platform assembly 6, as well as pre-installed iron outfitting components inside the segment. The aft bulkhead assembly 1, left bulkhead assembly 4, right bulkhead assembly 5, and top platform assembly 6 form a U-shaped structural frame. The construction method includes the following steps:

[0043] S1, the chimney section is constructed horizontally. Based on the arrangement characteristics of the outfitting components on the platform sections within the chimney section, the aft bulkhead section 1 is used as the construction base for the chimney section, and the aft bulkhead assembly 1 (FR65+710) is used as the base for laying the frame and installing longitudinal reinforcement. Figure 1 As shown.

[0044] S2, on the aft bulkhead assembly 1, install the internal platform assembly 2 and column 3 of the chimney section, and arrange anti-tilt bracing 7 as needed, such as... Figure 2 As shown.

[0045] S3, install the left bulkhead assembly 4 and the right bulkhead assembly 5 on both sides of the aft bulkhead assembly 1. The bottoms of the left bulkhead assembly 5 and the right bulkhead assembly 6 are connected to the two sides of the aft bulkhead assembly 1 to form a frame platform. To prevent deformation of the frame platform structure, a precision reinforcement 8 is provided at the edges of the left bulkhead assembly 4 and the right bulkhead assembly 5. Figure 3 As shown.

[0046] S4, install the top platform assembly 6 located at the top of the chimney section. At this time, the aft bulkhead assembly 1, left bulkhead assembly 4, right bulkhead assembly 5, and top platform assembly 6 form a "U"-shaped structural frame for the chimney section, as shown below. Figure 4 As shown.

[0047] S5, Install outfitting components within the "U"-shaped structural frame. The pre-installation of the outfitting components is carried out by erecting scaffolding layer by layer from bottom to top. The scaffolding is erected layer by layer according to the installation progress of the outfitting components, such as... Figure 5 As shown.

[0048] In step S5, the method for installing the outfitting components within the "U"-shaped structural frame of the chimney segment includes the following steps: The corresponding iron outfitting platform is fully installed in this stage, and the generator exhaust pipe 10 and its support, the generator scrubber tower exhaust pipe 11 and its support, and the main unit exhaust pipe 12 and its support are hoisted into place.

[0049] S51, Install the first layer of outfitting components; no scaffolding is required at this stage.

[0050] S52, begin installing the iron outfitting platform and generator exhaust pipe. The first layer of scaffolding can be erected as the installation progresses. Since the generator exhaust pipe 10 is large in volume and complex in structure, it is installed in three layers in sequence. At this time, the first layer of scaffolding is installed. The height of the first layer of scaffolding is 2.3-2.5m.

[0051] S53, Install the second-layer generator exhaust pipe 10 and its support. Erect the second-layer scaffolding as the installation progresses; the second-layer scaffolding will be 4.6-4.8m high.

[0052] S54, hoist the generator washing tower exhaust pipe 11, install the corresponding iron outfitting platform and ladder, at this time the reinforcement at the large opening of the top platform assembly 6 that interferes with the generator washing tower exhaust pipe 11 can be removed;

[0053] S55, hoist the main exhaust pipe 12 and its support. Due to the segmented horizontal construction, temporary supports need to be arranged on the main exhaust pipe 12. Some main exhaust pipes 12 can be installed vertically in the overall segment stage. In order to control the segment weight, they can be temporarily not installed in the segment stage.

[0054] S56, Install the third-layer generator exhaust pipe 10 and its support, and at the same time, install the iron outfitting platform that can be installed in the section. As the installation progresses, erect the third layer of scaffolding. The height of the third scaffolding is 6.9-7.1m. At this time, the process of installing the lower part of the section is strengthened.

[0055] S56 After the outfitting components within the “U”-shaped structural frame are fully installed, the front bulkhead is flipped over and welded to form a complete container ship chimney section.

[0056] like Figure 6 As shown. In step S6, after the outfitting components are pre-assembled, the forward bulkhead assembly is flipped over and installed to form a complete section. The forward bulkhead assembly 14 requires segmented outfitting, that is, the corresponding small pipes and supports 15 are installed during the forward bulkhead assembly construction stage. The segmented outfitting installation method is as follows:

[0057] S61, with the forward bulkhead 14 as the base, the frame is laid with plates, and longitudinal ribs are welded to form the forward bulkhead assembly 14;

[0058] S62, install small pipes and brackets 15 that can be fixed on the forward bulkhead assembly 14. The pipes involved in the segmented outfitting should not be too heavy to avoid affecting the hoisting and turning of the forward bulkhead assembly.

[0059] This invention solves the problem of difficult installation of segmented chimney outfitting components, reduces on-site construction difficulty, improves outfitting integrity, and shortens the construction cycle of segmented chimneys. This method is suitable for the construction of segmented chimneys that are large in size, structurally weak, and difficult to outfittize.

[0060] The above is merely one implementation of this invention. Other similar methods and structural substitutions can be made based on the same idea, and are not limited to the steps and structural components already described. In summary, the scope of protection of this invention also includes other variations and substitutions that are obvious to those skilled in the art.

Claims

1. A method for constructing a U-shaped section of a large container ship's chimney, characterized in that, The chimney section includes a forward bulkhead assembly (14), a rear bulkhead assembly (1), a left bulkhead assembly (4), a right bulkhead assembly (5), an internal platform assembly (2), and a top platform assembly (6), as well as pre-installed iron outfitting components inside the section. The rear bulkhead assembly (1), left bulkhead assembly (4), right bulkhead assembly (5), and top platform assembly (6) form a "U" shaped structural frame. The construction method includes the following steps: S1, the chimney section is constructed in a horizontal position. Based on the arrangement characteristics of the outfitting components inside the chimney section, the rear bulkhead assembly (1) is determined as the construction base surface of the chimney section, and the frame on the construction base surface is laid with boards. S2, on the rear bulkhead assembly (1), install the internal platform assembly (2) and column (3) of the chimney section, and arrange anti-tilt bracing (7) as needed. S3, install the left bulkhead assembly (4) and the right bulkhead assembly (5) on both sides of the rear bulkhead assembly (1). The bottom of the left bulkhead assembly (4) and the right bulkhead assembly (5) are connected to the two sides of the rear bulkhead assembly (1) to form a frame platform. In order to prevent the frame platform structure from deforming, precision reinforcement (8) is set at the edge of the left bulkhead assembly (4) and the right bulkhead assembly (5). S4, install the top platform assembly (6) located at the top of the chimney section, at which time the "U" shaped structural frame of the chimney section is formed by the rear bulkhead assembly (1), the left enclosure assembly (4), the right enclosure assembly (5), and the top platform assembly (6). S5, Install outfitting components within the "U"-shaped structural frame. The pre-installation of the outfitting components is carried out by erecting scaffolding layer by layer in order from bottom to top. The scaffolding is erected layer by layer according to the installation progress of the outfitting components. S6. After the outfitting components in the "U"-shaped structural frame are fully installed, the front bulkhead is turned over and welded to form a complete container ship chimney section. The front bulkhead assembly (14) needs to be piecemealized, that is, the corresponding small pipes and supports (15) are fully installed during the construction stage of the front bulkhead assembly (14). The anti-tilt brace (7) in step S2 and the precision enhancement (8) in step S3 are determined by three-dimensional software simulation. The complete model of the segmented structure and outfitting parts is retrieved in the three-dimensional software, and then the model of the anti-tilt brace (7) and the precision enhancement (8) is established. The newly created model will not interfere with the retrieved model.

2. The "U"-shaped construction method for segmented chimneys of large container ships according to claim 1, characterized in that, The outfitting components include an iron outfitting platform (9) and its support, a generator exhaust pipe (10) and its support, a generator scrubbing tower exhaust pipe (11) and its support, and a main unit exhaust pipe (12) and its support.

3. The "U"-shaped construction method for segmented chimneys of large container ships according to claim 1, characterized in that, In step S2, anti-tilt bracing (7) is arranged at the internal platform assembly. The anti-tilt bracing (7) needs to avoid interfering with the outfitting components installed later. The anti-tilt bracing (7) is arranged on the non-structural surface of the internal platform assembly (2).

4. The "U"-shaped construction method for segmented chimneys of large container ships according to claim 2, characterized in that, In step S5, during the outfitting installation phase within the "U"-shaped structural frame of the chimney segment, the corresponding iron outfitting platform is fully installed, and the generator exhaust pipe (10) and its support, the generator scrubber tower exhaust pipe (11) and its support, and the main unit exhaust pipe (12) and its support are respectively hoisted into place, including the following steps: S51, Install the first layer of outfitting components; no scaffolding is required at this stage. S52, begin installing the iron outfitting platform (9) and generator exhaust pipe (10). As the installation progresses, the first layer of scaffolding is erected. Since the generator exhaust pipe (10) is large in volume and complex in structure, it is installed in three layers in sequence. At this time, the first layer of scaffolding is installed. The height of the first layer of scaffolding is 2.3-2.5m. S53, install the second-layer generator exhaust pipe (10) and its support, and erect the second-layer scaffolding as the installation progresses. The height of the second-layer scaffolding is 4.6-4.8m. S54, hoist the generator washing tower exhaust pipe (11), and install the corresponding iron outfitting platform and ladder; S55, hoist the main exhaust pipe (12) and its support. Due to the segmented horizontal construction, temporary supports need to be arranged on the main exhaust pipe (12). Some main exhaust pipes (12) are installed vertically in the overall section stage. In order to control the weight of the section, they are not installed temporarily in the section stage. S56, install the third-layer generator exhaust pipe (10) and its support, and at the same time, install the iron outfitting platform that can be installed in the section. As the installation progresses, erect the third-layer scaffolding. The height of the third-layer scaffolding is 6.9-7.1m. At this time, install the section lower opening process reinforcement (13).

5. A method for constructing a U-shaped section of a large container ship's chimney according to claim 1, characterized in that, In step S6, the installation method of the segmented outfitting of the forward bulkhead assembly (14) is as follows: S61, the fore bulkhead is used as the base surface for laying the plank, and the longitudinal skeleton is welded to form the fore bulkhead assembly (14). S62, install small tubes and brackets (15) that can be fixed to the forward bulkhead assembly (14).

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