A container ship bow ventilation duct structure and its manufacturing method

Abstract

This invention discloses a bow ventilation duct structure for a container ship and its manufacturing method. The bow ventilation duct structure is formed by a top plate, hatch cofferdam, longitudinal bulkhead, aft bulkhead, and wave deflector bulkhead. By integrating the hatch cofferdam, wave deflector structure, and ventilation duct into one unit, the ventilation duct is formed between the hatch cofferdam and wave deflector structure. The ventilation duct at the bottom of the hold passes through each deck platform to reach the ventilation duct space, and communicates with the outside through the ventilation duct holes in the top plate to achieve ventilation. The design of this invention does not affect personnel passage or the anti-top reinforcement of the lashing bridge structure, while also meeting the design and application requirements of the wave deflector structure, hatch cofferdam structure, and ventilation duct structure, ensuring the simplicity and aesthetics of the overall structure.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a bow ventilation duct structure for a container ship and its manufacturing method. Background Technology

[0002] On large container ships, the entire cargo hold area is supported by hatch coaming structures on the main deck. The top structure of the hatch coaming includes hatch cover bases and lashing bridge columns for reinforcement, ensuring structural strength for stacking containers on the hatch covers. A wave deflector structure is located at the bow to block waves during navigation in rough seas, protecting the container cargo. Laddering bridges are installed between each cargo hold to secure containers stacked on the hatch covers. In the bow area, the hatch coamings, wave deflectors, and lashing bridges are adjacent to each other. Furthermore, due to the need for ventilation within the hold, an air duct structure is designed to connect the ship to the outside environment.

[0003] Currently, the ventilation duct structure is either designed independently on the forecastle deck or only integrated into the wave deflector structure, which not only affects the overall aesthetics and visibility of the bow, but also hinders the passage of personnel and even affects the arrangement of the bow mooring equipment. Summary of the Invention

[0004] In view of this, the present invention provides a container ship bow ventilation duct structure and its manufacturing method. By integrating the hatch coaming, wave deflector structure and ventilation duct into one unit, the ventilation duct is formed between the hatch coaming and wave deflector structure. While not affecting personnel passage and the anti-top reinforcement of the lashing bridge structure, it also meets the design and application requirements of the wave deflector structure, hatch coaming structure and ventilation duct structure, ensuring the simplicity and aesthetics of the overall structure.

[0005] A container ship bow ventilation duct structure includes a top plate, longitudinal wall plates, and

[0006] One end of the top plate is connected to the top of the hatch bulkhead, and the other end extends horizontally to the wave-breaking bulkhead. Ventilation holes are provided on the top plate.

[0007] There are two longitudinal bulkheads, which are fixed on both sides of the bottom of the top plate. The bottom of the longitudinal bulkheads is fixed to the deck. One end of the longitudinal bulkhead is fixed to the hatch cofferdam and the other end is fixed to the wave deflector bulkhead. A longitudinal bulkhead elbow is provided at the connection between the longitudinal bulkhead and the top plate, and a wave deflector elbow is provided at the connection between the wave deflector bulkhead and the top plate.

[0008] The aft bulkhead is located between the hatch cofferdam bulkhead and the wave deflector bulkhead, and its two sides are fixed to two longitudinal bulkheads respectively, its top is fixed to the top plate, and its bottom is fixed to the deck. Thus, together with the hatch cofferdam bulkhead, the top plate, the deck, and the two longitudinal bulkheads, it forms a hatch cofferdam structure, and together with the wave deflector bulkhead, the top plate, the deck, and the two longitudinal bulkheads, it forms a wind duct structure.

[0009] Preferably, the top plate is provided with hatch rim reinforcement ribs, the rear bulkhead is located at the position of the hatch rim reinforcement ribs, and the rear bulkhead is provided with bulkhead reinforcement ribs.

[0010] Preferably, the top plate is further provided with reinforcing ribs for tying bridge columns and reinforcing ribs for the top plate.

[0011] Preferably, the bottom of the longitudinal wall panel is aligned with the longitudinal strong structure on the deck, and the top is aligned with the tying bridge column.

[0012] Preferably, a manhole is provided on the surface of the longitudinal wall panel at the location of the air duct structure.

[0013] Preferably, the longitudinal wall elbow plate at the connection between the longitudinal wall plate and the top plate includes a first elbow plate and a second elbow plate. The first elbow plate is aligned with the tie-up bridge column to serve as a reverse top reinforcement for the tie-up bridge column, and the second elbow plate is aligned with the wave-breaking plate structure to serve as an extension reinforcement for the wave-breaking plate structure. The wave-breaking plate structure is disposed on the top surface of the top plate.

[0014] Preferably, both the first elbow plate and the second elbow plate are located in the area where the air duct structure is located.

[0015] Preferably, the longitudinal wall panel is inclined as a continuous extension of the upper and lower strong structures.

[0016] Preferably, a patch plate is provided at the end of the longitudinal wall panel that is fixed to the wave-breaking plate bulkhead to ensure the airtightness of the horizontal wave-breaking plate component after it passes through the longitudinal wall panel.

[0017] A method for manufacturing the bow ventilation duct structure of a container ship, specifically including the following steps:

[0018] S1, draw a segmentation line on the bow ventilation structure of the container ship to divide the structure into two parts: the hatch cofferdam section and the wave deflector section. The top plate, longitudinal wall plate, wave deflector elbow plate and top plate reinforcing rib are all divided into two parts, one part in the hatch cofferdam section and the other part in the wave deflector section.

[0019] S2, the hatch coaming section construction stage, the corresponding top plate is placed on the jig, and then the positioning lines of the longitudinal bulkhead, aft bulkhead, hatch coaming bulkhead and longitudinal bulkhead elbow plate are marked on the top plate. According to the marked positioning lines, the longitudinal bulkhead, aft bulkhead, hatch coaming bulkhead and longitudinal bulkhead elbow plate are welded into place in sequence.

[0020] Then, weld and fix the bridge column top reinforcement, wave baffle elbow plate, hatch cofferdam edge reinforcement and top plate reinforcement on the top plate to form the hatch cofferdam section;

[0021] S3, the phased construction of the wave shield: the wave shield bulkhead is placed on the jig, and then the positioning lines of the wave shield elbow plate and the top plate reinforcing rib are marked on the corresponding top plate. The wave shield elbow plate and the top plate reinforcing rib are then welded into place according to the marked positioning lines.

[0022] Then, mark the positioning lines for the top plate and longitudinal wall plates on the baffle bulkhead. Based on the marked positioning lines, weld the top plate and longitudinal wall plates into place to form the baffle segment.

[0023] S4, during the dock stage, the hatch cofferdam sections and wave deflectors are joined together to form a complete wind tunnel structure.

[0024] The beneficial effects of this invention are:

[0025] 1. The bow ventilation structure of the present invention is formed by a top plate, hatch cofferdam bulkhead, longitudinal bulkhead, aft bulkhead, and wave deflector bulkhead. By integrating the hatch cofferdam, wave deflector structure, and ventilation duct into one unit, the ventilation duct is formed between the hatch cofferdam and wave deflector structure. The ventilation duct at the bottom of the hull passes through each deck platform to reach the ventilation duct space, and communicates with the outside through the ventilation duct holes in the top plate to achieve ventilation. The design of the present invention does not affect personnel passage and the anti-top reinforcement of the lashing bridge structure, while also meeting the design and application requirements of the wave deflector structure, hatch cofferdam structure, and ventilation duct structure, ensuring the simplicity and aesthetics of the overall structure.

[0026] 2. This invention fully considers the spatial arrangement of the hatch cofferdam, wave baffle, and lashing bridge columns, integrating the duct structure with the hatch cofferdam and wave baffle structures into a unified whole. The top plate serves as both the duct top plate and the hatch cofferdam top plate, and also as a horizontal reinforcement for the wave baffle. The hatch cofferdam longitudinal bulkheads function as the duct sidewalls, the wave baffle vertical components, and also as a reverse reinforcement for the lashing bridge columns. This avoids the duct occupying limited deck space, enhancing the overall design and aesthetics.

[0027] 3. This invention integrates the wind duct structure with the hatch cofferdam and wave deflector, making it an integral part of the ship's main structure. The installation location and form of the wind duct structure are considered during the design and manufacturing of the hatch cofferdam and wave deflector. The wind duct structure is welded together in the segmented stages of the hatch cofferdam and wave deflector. In the dock stage, after the hatch cofferdam and wave deflector are joined, the wind duct structure can be fully assembled. This integrated design and manufacturing of the three components reduces manufacturing costs and meets design requirements.

[0028] 4. The longitudinal wall elbow plate provided at the connection between the longitudinal wall plate and the top plate in this invention can not only increase the connection strength at the connection between the longitudinal wall plate and the top plate, but also serve as a reinforcement for the tie-up bridge column and the extension reinforcement for the wave baffle structure. It can also serve as a reinforcement structure for the longitudinal wall of the wind duct, thereby increasing the structural strength of the wind duct structure. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments 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.

[0030] Figure 1 This is a top view of the arrangement structure of the bow ventilation duct of the container ship according to the present invention.

[0031] Figure 2 yes Figure 1 View A in the diagram.

[0032] Figure 3 yes Figure 1 View B in the diagram.

[0033] Figure 4 yes Figure 1 The C-direction view in the image.

[0034] Figure 5 yes Figure 2 The D-direction view in the image.

[0035] Figure 6 yes Figure 2 The E-direction view in the image.

[0036] Figure 7 yes Figure 1 The F-direction view in the image.

[0037] Figure 8 yes Figure 1 The G-direction view in the image.

[0038] The labels in the diagram mean:

[0039] 1—Top plate, 2—Aft bulkhead, 3—Boom baffle bulkhead, 4—Ventilation duct opening, 5—Hatch cofferdam bulkhead, 6—Longitudinal bulkhead, 7—First elbow plate, 8—Second elbow plate, 9—Boom baffle structural component, 10—Bulkhead reinforcing rib, 11—Bailback bridge column anti-top reinforcing rib, 12—Boom baffle elbow plate, 13—Hatch cofferdam edge reinforcing rib, 14—Top plate reinforcing rib, 15—Patch plate, 16—Manhole, 17—Deck, 18—Section dividing line, 19—Ventilation duct. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0041] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0042] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms and should not be construed as indicating or implying relative importance. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0043] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0045] This invention provides a bow ventilation duct structure for a container ship, comprising a top plate 1, a hatch cofferdam 5, longitudinal bulkheads 6, aft bulkheads 2, and wave-damping bulkheads 3.

[0046] like Figure 1 As shown, one end of the top plate 1 is connected to the top of the hatch cofferdam 5, and the other end extends horizontally to the wave-damping bulkhead 3. In this embodiment, the top plate 1 is generally π-shaped. The rear end of the top plate 1 extends to connect with the hatch cofferdam 5, and the front end extends to connect with the wave-damping bulkhead 3. The front ends of the top plate 1 are provided with outwardly protruding connecting ends, which extend to the vertical fixing members of the wave-damping plate respectively. The top plate 1 serves as the top plate of the hatch cofferdam, the top plate of the wind duct structure, and a component of the horizontal reinforcement members of the wave-damping plate.

[0047] The top plate 1 is provided with ventilation holes 4, which are located on the plate surface of the top plate 1 at the location of the air duct structure. The size of the ventilation holes 4 is smaller than the size of the air duct.

[0048] Preferably, the top plate 1 is further provided with hatch rim reinforcement 13, bridge column anti-top reinforcement 11 and top plate reinforcement 14.

[0049] like Figure 1 , Figure 2 , Figure 3 As shown, there are two longitudinal bulkheads 6. The upper parts of the two longitudinal bulkheads 6 are fixed to the top plate 1, and the bottom of the longitudinal bulkheads 6 are fixed to the deck 17. One end of the longitudinal bulkhead 6 is fixed to the hatch cofferdam 5, and the other end is fixed to the wave deflector bulkhead 3. The two longitudinal bulkheads 6 serve as both side walls of the hatch cofferdam and side walls of the ventilation duct structure.

[0050] In this embodiment, the two longitudinal wall panels 6 are inclined as continuous extensions of the upper and lower reinforcing structures. Preferably, the bottom of the longitudinal wall panel 6 is aligned with the longitudinal reinforcing structure on the deck 17, and the top is aligned with the lashing bridge column. In this way, the bottom of the longitudinal wall panel 6 can obtain strong support through the longitudinal reinforcing structure on the lower surface of the deck, while the longitudinal wall panel 6 itself can serve as a reverse top support for the lashing bridge column, effectively supporting the lashing bridge structure.

[0051] The two longitudinal wall panels 6 serve as both side walls of the hatch coaming and the ventilation duct structure. Manholes 16 are provided on the surface of the longitudinal wall panels 6 at the location of the ventilation duct structure to facilitate personnel passage.

[0052] The longitudinal wall plate 6 is provided with a patch plate 15 at one end that is fixed to the wave-breaking plate bulkhead 3 to ensure the airtightness of the horizontal wave-breaking plate component after it passes through the longitudinal wall plate 6.

[0053] like Figure 5 , Figure 6 As shown, a longitudinal wall elbow plate is also provided at the connection between the longitudinal wall plate 6 and the top plate 1. The longitudinal wall elbow plate includes a first elbow plate 7 and a second elbow plate 8. The first elbow plate 7 is aligned with the tie-up bridge column to serve as a reverse top reinforcement for the tie-up bridge column. One side of the first elbow plate 7 is welded and fixed to the longitudinal wall plate 6, and the other side is welded and fixed to the top plate 1. The second elbow plate 8 is aligned with the wave-breaking plate structure 9 to serve as an extension reinforcement for the wave-breaking plate structure. One side of the second elbow plate 8 is welded and fixed to the longitudinal wall plate 6, and the other side is welded and fixed to the top plate 1. The wave-breaking plate structure 9 is disposed on the top surface of the top plate 1, and the wave-breaking plate structure 9 and the second elbow plate 8 are aligned vertically.

[0054] In this embodiment, the first elbow plate 7 and the second elbow plate 8 are both located in the area where the air duct structure is located. In this way, the first elbow plate 7 and the second elbow plate 8 can also serve as a reinforcing structure for the longitudinal wall of the air duct, thereby increasing the structural strength of the air duct structure.

[0055] like Figure 1As shown, the aft bulkhead 2 is vertically positioned between the hatch cofferdam bulkhead 5 and the wave deflector bulkhead 3, and its two sides are respectively fixed to two longitudinal bulkheads 6. The top of the aft bulkhead 2 is fixed to the top plate 1, and the bottom of the aft bulkhead 2 is fixed to the deck 17. Therefore, the aft bulkhead 2, together with the hatch cofferdam bulkhead 5, the top plate 1, the deck 17, and the two longitudinal bulkheads 6, forms the hatch cofferdam structure. The aft bulkhead 2, together with the wave deflector bulkhead 3, the top plate 1, the deck 17, and the two longitudinal bulkheads 6, forms the wind duct structure, thereby integrating the hatch cofferdam, the wind duct structure, and the wave deflector structure into one, with the wind duct structure formed between the hatch cofferdam and the wave deflector structure.

[0056] The aft bulkhead 2 serves both as the forward bulkhead of the hatch coaming and as the aft bulkhead of the ventilation duct structure. In this embodiment, as... Figure 4 As shown, the aft bulkhead 2 is located at the position of the hatch cofferdam reinforcing rib 13. The hatch cofferdam reinforcing rib 13 can reinforce the edge of the hatch cofferdam and also reinforce the connection between the aft bulkhead 2 and the top plate 1. The hatch cofferdam reinforcing rib 13 separated by the aft bulkhead 2 is also welded and fixed to the longitudinal bulkhead plate 6. Several bulkhead reinforcing ribs 10 are also provided on the aft bulkhead 2.

[0057] like Figure 7 As shown, the wave-deflecting bulkhead 3 serves as the forward bulkhead of the wind duct structure. The bottom of the wave-deflecting bulkhead 3 is fixed to the deck 17, and the top of the wave-deflecting bulkhead 3 extends upward beyond the top plate 1. Both sides of the wave-deflecting bulkhead 3 are fixed to two longitudinal bulkheads 6 respectively. The horizontal wave-deflecting member passes through the longitudinal bulkhead 6, and the bulkhead at its penetration point is sealed by a patch plate 15 to ensure the airtightness of the longitudinal bulkhead 6.

[0058] like Figure 8 As shown, a wave-blocking elbow plate 12 is provided at the connection between the wave-blocking bulkhead 3 and the top plate 1. One side of the wave-blocking elbow plate 12 is welded and fixed to the top plate 1, and the other side is welded and fixed to the wave-blocking bulkhead 3. The wave-blocking elbow plate 12 is used to enhance the connection rigidity between the air duct and the wave-blocking plate.

[0059] The present invention also provides a method for manufacturing the aforementioned container ship bow ventilation duct structure, specifically including the following steps:

[0060] S1, draw a segmentation line 18 on the bow ventilation structure of the container ship to divide the structure into two parts: the hatch cofferdam section and the wave deflector section. That is, the top plate 1, longitudinal wall plate 6, wave deflector elbow plate 12 and top plate reinforcing rib 14 are all divided into two parts, one part in the hatch cofferdam section and the other part in the wave deflector section.

[0061] S2, during the hatch coaming segment construction stage, the corresponding top plate 1 is placed on the jig, and then the positioning lines of the longitudinal bulkhead 6, aft bulkhead 2, hatch coaming bulkhead 5, and longitudinal bulkhead elbow plate are drawn on the top plate 1. According to the drawn positioning lines, the longitudinal bulkhead 6, aft bulkhead 2, hatch coaming bulkhead 5 and longitudinal bulkhead elbow plate are welded into place in sequence.

[0062] Then, weld and fix the bridge column anti-top reinforcing rib 11, wave baffle elbow plate 12, hatch cofferdam edge reinforcing rib 13 and top plate reinforcing rib 14 on the top plate 1 to form the hatch cofferdam segment.

[0063] S3, the wave-damping section construction stage, the wave-damping bulkhead 3 is placed on the jig, and then the positioning lines of the wave-damping elbow plate 12 and the top plate reinforcing rib 14 are drawn on the corresponding top plate 1. The wave-damping elbow plate 12 and the top plate reinforcing rib 14 are then welded into place according to the marked positioning lines.

[0064] Then, mark the positioning lines of the top plate 1 and longitudinal wall plate 6 on the wave-damping bulkhead 3, and weld the top plate 1 and longitudinal wall plate 6 into place according to the marked positioning lines to form the wave-damping segment.

[0065] S4, during the dock stage, the hatch cofferdam sections and wave deflectors are joined together to form a complete wind tunnel structure.

[0066] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A bow duct structure of a container ship, characterized by, The invention relates to a container ship wind tunnel structure, which comprises a top plate (1), a hatch coaming bulkhead (5), a longitudinal wall plate (6), a rear bulkhead (2) and a wave baffle bulkhead (3), One end of the top plate (1) is connected to the top of the hatch coaming bulkhead (5), and the other end extends horizontally to the wave baffle bulkhead (3); the top plate (1) is provided with a ventilation hole (4); The longitudinal wall plate (6) is provided with two longitudinal wall plates (6), the upper part of the two longitudinal wall plates (6) is fixed to the top plate (1), the bottom of the longitudinal wall plate (6) is fixed to the deck (17), one end of the longitudinal wall plate (6) is fixed to the hatch coaming bulkhead (5), and the other end is fixed to the wave baffle bulkhead (3); the connection between the longitudinal wall plate (6) and the top plate (1) is provided with a longitudinal wall elbow plate, and the connection between the wave baffle bulkhead (3) and the top plate (1) is provided with a wave baffle elbow plate (12); The rear bulkhead (2) is arranged between the hatch coaming bulkhead (5) and the wave baffle bulkhead (3), and the two sides of the rear bulkhead (2) are fixed to the two longitudinal wall plates (6), the top of the rear bulkhead (2) is fixed to the top plate (1), and the bottom of the rear bulkhead (2) is fixed to the deck (17), so as to form a hatch coaming structure together with the hatch coaming bulkhead (5), the top plate (1), the deck (17) and the two longitudinal wall plates (6), and form a wind tunnel structure together with the wave baffle bulkhead (3), the top plate (1), the deck (17) and the two longitudinal wall plates (6).

2. A container ship bow duct structure according to claim 1, characterised in that, The top plate (1) is provided with a hatch coaming edge opening reinforcing rib (13), and the rear bulkhead (2) is arranged at the position of the hatch coaming edge opening reinforcing rib (13); the rear bulkhead (2) is provided with a bulkhead reinforcing rib (10).

3. The container ship bow duct structure according to claim 1, characterized in that, The top plate (1) is further provided with a lashing bridge column counter-top reinforcing rib (11) and a top plate reinforcing rib (14).

4. The container ship bow duct structure according to claim 1, characterized in that, The bottom of the longitudinal wall plate (6) is aligned with the longitudinal strong structure on the deck (17), and the top of the longitudinal wall plate (6) is aligned with the lashing bridge column.

5. A container ship bow duct structure according to claim 1 or 4, characterized in that A manhole (16) is arranged on the plate surface of the position of the wind tunnel structure of the longitudinal wall plate (6).

6. The container ship bow duct structure according to claim 1, characterized in that, The longitudinal wall elbow plate at the connection between the longitudinal wall plate (6) and the top plate (1) comprises a first elbow plate (7) and a second elbow plate (8); the first elbow plate (7) is aligned with the lashing bridge column to serve as a lashing bridge column counter-top reinforcing rib; the second elbow plate (8) is aligned with the wave baffle structure member (9) to serve as a wave baffle structure extension reinforcing rib; and the wave baffle structure member (9) is arranged on the top surface of the top plate (1).

7. A container ship bow duct structure according to claim 6, characterised in that, The first elbow plate (7) and the second elbow plate (8) are arranged in the area of the wind tunnel structure.

8. The container ship bow duct structure of claim 1, wherein, The longitudinal wall plate (6) is arranged to be inclined as a continuous extension of the upper and lower strong structures.

9. The container ship bow duct structure of claim 1, wherein, One end of the longitudinal wall plate (6) fixed to the wave baffle bulkhead (3) is provided with a patch (15) to ensure the air tightness after the wave baffle horizontal member passes through the longitudinal wall plate (6).

10. A method of manufacturing the bow duct structure of the container ship as set forth in claim 3, characterized by, Specifically, the method comprises the following steps: S1, a segmentation dividing line is drawn on the bow wind tunnel structure of the container ship to divide the structure into a hatch coaming segment and a wave baffle segment; the top plate (1), the longitudinal wall plate (6), the wave baffle elbow plate (12) and the top plate reinforcing rib (14) are all divided into two parts, one part is in the hatch coaming segment, and the other part is in the wave baffle segment; S2, in the hatch coaming sub-assembly stage, the corresponding top plate (1) is placed on the jig, then the positioning lines of the longitudinal wall plate (6), the rear bulkhead (2), the hatch coaming bulkhead (5) and the longitudinal wall elbow plate are drawn on the top plate (1), and the longitudinal wall plate (6), the rear bulkhead (2), the hatch coaming bulkhead (5) and the longitudinal wall elbow plate are sequentially welded in place according to the drawn positioning lines; Then, the bridge column counter-top reinforcing rib (11), the wave baffle elbow plate (12), the hatch coaming edge opening reinforcing rib (13) and the top plate reinforcing rib (14) are welded and fixed on the top plate (1), forming a hatch coaming sub-assembly; S3, in the wave baffle sub-assembly stage, the wave baffle bulkhead (3) is placed on the jig, then the positioning lines of the wave baffle elbow plate (12) and the top plate reinforcing rib (14) are drawn on the corresponding top plate (1), and the wave baffle elbow plate (12) and the top plate reinforcing rib (14) are welded in place according to the drawn positioning lines; Then, the positioning lines of the top plate (1) and the longitudinal wall plate (6) are drawn on the wave baffle bulkhead (3), and the top plate (1) and the longitudinal wall plate (6) are welded in place according to the drawn positioning lines, forming a wave baffle sub-assembly; S4, in the dock stage, the hatch coaming sub-assembly and the wave baffle sub-assembly are closed and connected, forming a complete air duct structure.

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