Composite chimney structure with deflectors and method of installation thereof

Abstract

This invention discloses a composite chimney structure with a guide plate and its installation method. The chimney structure includes two sidewalls, a front wall, a rear wall, a guide component, a sealing plate, and a flue gas emission component. The front wall, rear wall, and two sidewalls located on the left and right sides are connected to form a chimney frame. An inclined guide section, made of steel, is formed on the upper part of the rear wall. The guide component is installed on the inner side of the guide section. The sealing plate is horizontally installed in the inner cavity of the chimney frame, and the flue gas emission component is vertically installed on the sealing plate. The sidewalls, front wall, sealing plate, and rear wall are all made of aluminum alloy. The beneficial effects of this invention are: the main body is made of aluminum alloy, reducing the chimney's weight and lowering the upper center of gravity, thus improving ship stability; the guide section is made of steel, enabling directional guidance of high-temperature flue gas, effectively solving the problem that existing technologies cannot simultaneously achieve both lightweight chimney reduction and high-temperature protection of the high-temperature area at the stern.

Description

Technical Field

[0001] This invention relates to the field of hull structure design for surface vessels, specifically to a composite chimney structure with a guide vane and its installation method. Background Technology

[0002] A funnel is a cofferdam in a ship's superstructure that serves functions such as smoke extraction, heat insulation, and noise reduction. Traditional steel funnel structures, due to their large weight and high center of gravity, can negatively impact a ship's stability. Furthermore, during navigation, the exhaust pipes of the ship's propulsion equipment emit large amounts of high-temperature gases, which can affect the overall mechanical properties of the funnel's stern region. Currently, there is a lack of integrated funnel designs that simultaneously achieve lightweighting, high-temperature protection at the stern, and optimal structural mechanical performance. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a composite chimney structure with a baffle plate and its installation method, aiming to solve the problem of difficulty in simultaneously achieving lightweighting and weight reduction, as well as high-temperature protection at the tail end, in existing technologies.

[0004] The technical solution adopted in this invention is: a composite chimney structure with a guide plate, comprising two side wall plates, a front wall plate, a rear wall plate, a guide plate, a sealing plate, and a flue gas emission component; The front wall panel, the rear wall panel, and the two side wall panels located on the left and right sides are connected to form the chimney frame. The upper part of the rear wall panel extends backward and upward to form an inclined guide section, and the guide section of the rear wall panel is made of steel. The inner side of the guide section is covered with a guide component; The sealing plate is horizontally installed inside the chimney frame, dividing the interior of the chimney frame into upper and lower chambers. The flue gas emission component is vertically installed on the sealing plate, and the upper end of the flue gas emission component is bent in the direction of the guide component; The side panels, front panels, sealing panels, and rear panels are all made of aluminum alloy.

[0005] According to the above scheme, the guide component is a guide plate, which is installed at an angle, and the angle of the guide plate is consistent with the angle of the guide section of the rear wall plate.

[0006] According to the above scheme, a butt plate is provided at the upper rear end of both side wall panels for assembly with the extension section of the rear wall panel.

[0007] According to the above scheme, the inner cavity of the chimney frame is provided with at least one first horizontal truss structure and at least one second horizontal truss structure. The first horizontal truss structure and the second horizontal truss structure are respectively located on the upper and lower sides of the sealing plate, and both are tightly connected to the inner wall of the chimney frame. The first horizontal truss structure and the second horizontal truss structure are both made of aluminum alloy.

[0008] According to the above scheme, the exhaust gas component includes a first exhaust pipe and a second exhaust pipe; the first exhaust pipe and the second exhaust pipe are vertically installed on the sealing plate; wherein the lower end of the first exhaust pipe is connected to the exhaust gas outlet of the ship's main engine, and the lower end of the second exhaust pipe is connected to the exhaust gas outlet of the ship's diesel generator; the upper ends of the two exhaust pipes are bent in the direction of the guide plate.

[0009] According to the above scheme, the bottoms of the two side panels, the front panel, and the rear panel are all connected to the ship's deck via steel-aluminum composite joints; the rear panel is connected to the extension section via steel-aluminum composite joints; and the butt plate is connected to the side panels via corresponding steel-aluminum composite joints.

[0010] According to the above scheme, louvered openings are respectively opened at the rear of the two side wall panels.

[0011] According to the above scheme, a vertical partition is provided below the sealing plate, which divides the inner cavity of the chimney frame below the sealing plate into two areas, front and back.

[0012] According to the above scheme, vertical reinforcing ribs are also added to the partition.

[0013] The present invention also employs an installation method for a composite chimney structure with a guide vane as described above, the method being as follows: Step 1: Cut, bend, and prefabricate various panels, trusses, and connecting accessories according to the dimensions in the design drawings; process pipe installation holes for the sealing panels and openings for the side wall panels, and prefabricate steel-aluminum composite joints at the same time. Step 2: Assemble and fix the steel-aluminum composite joints at the bottom of the two side panels, the front panel, and the rear panel to the designated positions on the ship's deck, align and place each panel, and complete the temporary fixation of the bottom of the chimney frame. Step 3: Weld and splice the two side wall panels, front wall panel, and rear wall panel to form the chimney frame; complete the butt welding of the aluminum side wall panel and the steel rear wall panel guide section through the steel butt plate, and correct the verticality and flatness of the chimney frame. Step 4: Securely install the first horizontal truss structure and the second horizontal truss structure in the upper and lower areas of the inner cavity of the chimney frame to form a ring support; horizontally hoist the sealing plate and fix it to the upper middle part of the chimney frame to divide the inner cavity of the chimney frame into upper and lower chambers. Step 5: Vertically install and fix each exhaust pipe into the corresponding pipe mounting hole in the sealing plate, and connect them to the exhaust outlets of the ship's main engine and diesel generator respectively; adjust the bending angle of the upper end of the two exhaust pipes so that they face the direction of the guide plate; Step 6: Install the deflector at an angle on the inner surface of the deflector section of the rear wall panel, ensuring that the angle of the deflector is consistent with the angle of the deflector section, and completely cover the deflector section area; Step 7: Check the strength of the chimney structure, assembly accuracy, welding quality, and the sealing of each component connection.

[0014] The beneficial effects of this invention are as follows: 1. The sidewalls, front wall, sealing plate, and rear wall of this invention are all made of aluminum alloy, which can significantly reduce the weight of the chimney, lower the upper center of gravity, and improve the stability of the ship. Only the rear wall guide section, which is subjected to high-temperature flue gas for a long time, is made of steel. It is combined with the bent flue gas emission component arranged opposite the guide section to achieve directional guidance of high-temperature flue gas. This effectively solves the problem that the existing technology is unable to simultaneously achieve the goal of chimney weight reduction and high-temperature protection of the high-temperature area at the tail. Under the premise of controlling the overall weight, it avoids the continuous damage of high-temperature flue gas to the tail structure of the chimney.

[0015] 2. In this invention, the angle of the guide plate matches and fits the angle of the rear guide section, which can completely cover the inner wall of the steel guide section, regulate and divert high-temperature flue gas, eliminate airflow turbulence, avoid local high temperature concentration, reduce the thermal impact of high-temperature flue gas on the tail structure, and improve the heat dissipation effect.

[0016] 3. The side wall panel of the present invention is provided with a butt plate at the upper end of the rear end to realize reliable connection between the side wall and the steel guide extension section, which can improve the connection strength of the splicing node of dissimilar aluminum and steel materials and the thermal fatigue resistance of the weld, prevent deformation and cracking of the splicing position under high temperature environment, and improve the connection stability of the overall structure of the chimney. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0018] Figure 2 This is a schematic diagram of the chimney frame in Example 1.

[0019] Figure 3 This is a schematic diagram of the side wall panel in Example 1.

[0020] Figure 4 This is a schematic diagram of the front wall panel in Example 1.

[0021] Figure 5 This is a schematic diagram of the rear wall panel in Example 1.

[0022] Figure 6 This is a schematic diagram of the longitudinal section of the chimney frame in Example 1.

[0023] Figure 7 This is a schematic diagram of the first horizontal truss structure in Example 1.

[0024] Figure 8 This is a schematic diagram of the second horizontal truss structure in Example 1.

[0025] Figure 9 This is a schematic diagram of the sealing plate in Example 1.

[0026] Figure 10 This is a schematic diagram of the docking plate in Example 1.

[0027] Figure 11 This is a schematic diagram of the installation of the guide plate in Example 1.

[0028] The components are as follows: 1. Side wall panel; 2. Front wall panel; 3. Rear wall panel; 4. Sealing plate; 401. First pipe mounting hole; 402. Second pipe mounting hole; 5. First horizontal truss structure; 6. Second horizontal truss structure; 7. Connecting plate; 8. Steel-aluminum composite joint; 9. Guide plate; 10. Extension section; 11. First louver opening; 12. Second louver opening; 13. First exhaust pipe; 14. Second exhaust pipe; 15. Support plate; 16. Fan equipment opening; 17. Partition plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this application, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only used to facilitate the description of this application and to simplify 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 application.

[0033] Furthermore, in this application, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Moreover, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] like Figure 1 and 2 The composite chimney structure with a guide plate shown is specifically a marine composite chimney, including two side walls 1, a front wall 2, a rear wall 3, a guide plate, a sealing plate 4, and a flue gas emission component; The front wall panel 2, the rear wall panel 3, and the two side wall panels 1 located on the left and right sides are connected to form a chimney frame. The upper part of the rear wall panel 3 extends rearward and upward, and the extended portion forms an inclined guide section, such as... Figure 5 As shown, the guide section of the rear wall panel 3 is made of steel. The inner side of the guide section is covered with a guide component; The sealing plate 4 is horizontally installed in the inner cavity of the chimney frame, and the sealing plate 4 divides the inside of the chimney frame into upper and lower chambers. The flue gas emission component is vertically installed on the sealing plate 4, and the upper end of the flue gas emission component is bent in the direction of the guide component; The side wall panel 1, front wall panel 2, sealing plate 4, and rear wall panel 3 are all made of aluminum alloy.

[0037] In this invention, each main body is made of aluminum alloy. By replacing traditional steel plates with aluminum components, the overall weight of the chimney structure can be significantly reduced, the center of gravity of the chimney structure can be lowered, and the stability of the ship can be improved. At the same time, the design of the flow guide can guide and divert the high-temperature exhaust gas, preventing the high-temperature exhaust gas from directly blowing and scouring the extension section 10 of the rear wall panel 3, and reducing the heat load in the rear area.

[0038] Preferably, such as Figure 11 As shown, the flow guide is a flow guide plate 9, which is installed at an angle and the angle of inclination of the flow guide section of the rear wall plate 3 is consistent with that of the flow guide plate 9. The flow guide plate 9 is made of steel.

[0039] In this invention, the tail section is the rear part of the entire chimney structure; the guide plate 9 is installed on the inner side of the guide section through the support plate 15; the guide plate 9 is adapted to the large inclination angle of the guide section at the tail of the chimney structure, which can completely cover the guide section and optimize the exhaust heat dissipation effect.

[0040] Preferably, a mating plate 7 is provided at the upper rear end of both side wall panels 1 for mating and assembly with the extension section 10 of the rear wall panel 3.

[0041] Preferably, the docking plate 7 is made of steel.

[0042] In this invention, such as Figure 7 As shown, the rear part of the mating plate 7 is connected to the end of the extension section 10 of the rear wall panel 3, and the lower and front parts of the mating plate 7 are connected to the main body of the side wall panel 1. The steel mating plate 7 can improve the structural strength of the connection between the side wall panel 1 and the extension section 10.

[0043] Preferably, the inner cavity of the chimney frame is provided with at least one first horizontal truss structure 5 and at least one second horizontal truss structure 6. The first horizontal truss structure 5 and the second horizontal truss structure 6 are respectively located on the upper and lower sides of the sealing plate 4, and both are tightly connected to the inner wall of the chimney frame.

[0044] Preferably, both the first horizontal truss structure 5 and the second horizontal truss structure 6 are made of aluminum alloy.

[0045] In this invention, both horizontal truss structures are formed by multiple horizontally arranged connecting rods connected in sequence; the two horizontal truss structures arranged in upper and lower layers can form multiple ring-shaped support constraints on the aluminum enclosure of the chimney structure, effectively improving the overall strength, rigidity and deformation resistance of the chimney structure; at the same time, the trusses are made of aluminum alloy, which will not significantly increase the total weight of the chimney structure.

[0046] Preferably, the exhaust gas component includes a first exhaust pipe 13 and a second exhaust pipe 14; the first exhaust pipe 13 and the second exhaust pipe 14 are vertically installed on the sealing plate 4; wherein the lower end of the first exhaust pipe 13 is connected to the exhaust gas outlet of the ship's main engine, and the lower end of the second exhaust pipe 14 is connected to the exhaust gas outlet of the ship's diesel generator; the upper ends of the two exhaust pipes are bent in the direction of the guide plate 9.

[0047] In this invention, such as Figure 9 As shown, the sealing plate 4 has a first pipe mounting hole 401 that matches the diameter of the first exhaust pipe 13 and a second pipe mounting hole 402 that matches the diameter of the second exhaust pipe 14; the diameter of the first exhaust pipe 13 is larger than that of the second exhaust pipe 14; two sets of the first exhaust pipe 13 and the second exhaust pipe 14 are arranged, and the specific structural forms of the two exhaust pipes are designed according to the actual situation.

[0048] Preferably, such as Figure 6 As shown, a vertical partition 17 is provided below the sealing plate 4, which divides the inner cavity of the chimney frame below the sealing plate 4 into two areas, front and back.

[0049] In this invention, the partition 17 is further provided with vertical reinforcing ribs; the partition 17 provides support for the sealing plate 4.

[0050] Example 1 like Figure 1 and 2 The composite chimney structure with a guide plate shown includes two side wall panels 1, a front wall panel 2, a rear wall panel 3 (including the main body and the extension section 10), a sealing plate 4, a first horizontal truss structure 5, a second horizontal truss structure 6, a connecting plate 7, and a guide plate 9.

[0051] In this embodiment, to reduce the weight of the chimney structure, the entire chimney structure is made of aluminum (aluminum alloy material), that is, the side wall panel 1, front wall panel 2, rear wall panel 3 (main body), sealing plate 4, and two horizontal truss structures are all made of aluminum alloy; wherein the sealing plate 4 is located in the upper middle part of the chimney frame. Combined with... Figure 3 , 4 5, 7, 8, the two horizontal truss structures, the end plate 4, and the extension section 10 of the rear wall plate 3 provide the chimney enclosure with good strength, rigidity, and stability, and can withstand external loads.

[0052] The inclination angle of the extension section 10 of the chimney frame is adapted to the bending angle of the upper end of the exhaust pipe (which can be designed to be consistent), improving the heat dissipation efficiency of the exhaust pipe; the connecting plate 7 of the side wall panel 1 and the extension section 10 of the rear wall panel 3 is designed as a steel structure, which can also improve the high-temperature resistance of the tail of the chimney frame. Figure 9 The extension section 10 of the rear wall panel 3 is equipped with a guide plate 9. The angle of the guide plate 9 is similar to the large inclination angle of the extension section 10, which facilitates the guidance of exhaust gas and improves the heat dissipation efficiency of the exhaust pipe. At the same time, it shields the extension section 10 to reduce the impact of high-temperature exhaust gas on the chimney frame.

[0053] In this embodiment, the specific structures of the front wall panel 2, the rear wall panel 3, and the two side wall panels 1 are designed according to the actual situation, and each wall panel is composed of multiple panels connected in sequence.

[0054] In this embodiment, as Figure 3 As shown, louvered openings are provided at the rear of both sidewall panels 1 for exhausting the engine room; Figure 1 As shown, the two louver openings can be designed to be the same or different, such as the first louver opening 11 and the second louver opening 12; the front of the two side wall panels 1 is provided with fan equipment openings 16; the openings on the side wall panels 1 are existing conventional technologies and will not be described in detail here.

[0055] In this embodiment, the bottoms of the two sidewall panels 1, the front panel 2, and the rear panel 3 are all connected to the ship's deck via steel-aluminum composite joints 8. The main body of the rear panel 3 is also connected to the extension section 10 via steel-aluminum composite joints 8. The mating plate 7 is connected to the sidewall panel 1 via corresponding steel-aluminum composite joints 8, as shown below. Figure 10 As shown. The specific form of the steel-aluminum composite joint 8 is designed according to the connection position, and it can be strip-shaped; this steel-aluminum composite structure is made of aluminum-titanium-steel alloy.

[0056] Example 2 This embodiment provides an installation method for the composite chimney structure with guide vanes described in Embodiment 1. The method is as follows: Step 1: Cut, bend and prefabricate various panels, trusses and connecting accessories according to the dimensions of the design drawings; process the pipe installation holes of the sealing plate 4 and the openings of the side wall plate 1, and prefabricate the steel-aluminum composite joint 8 at the same time. Step 2: Assemble and fix the steel-aluminum composite joints 8 at the bottom of the two sidewall panels 1, the front panel 2, and the rear panel 3 to the designated positions on the ship's deck, align and place each panel, and complete the temporary fixation of the bottom of the chimney frame.

[0057] Step 3: Weld and splice the two side wall panels 1, the front wall panel 2, and the rear wall panel 3 to form the chimney frame; complete the butt welding of the aluminum side wall panel 1 and the steel rear wall panel 3 guide section through the steel butt plate 7, and correct the verticality and flatness of the chimney frame. Step 4: Securely install the first horizontal truss structure 5 and the second horizontal truss structure 6 in the upper and lower areas of the inner cavity of the chimney frame to form a ring support; horizontally hoist the sealing plate 4 and fix it to the upper middle part of the chimney frame to divide the inner cavity of the chimney frame into upper and lower chambers. Step 5: Vertically insert and fix each exhaust pipe into the corresponding pipe mounting hole of the sealing plate 4, and connect them to the exhaust outlets of the ship's main engine and diesel generator respectively; adjust the bending angle of the upper end of the two exhaust pipes so that they face the direction of the guide plate 9. Step 6: Install the guide plate 9 at an angle on the inner surface of the guide section of the rear wall panel 3, ensuring that the angle of the guide plate 9 is consistent with the angle of the guide section, and completely cover the guide section area; Step 7: Inspect the strength, assembly accuracy, welding quality, and sealing of the chimney structure and its components, and conduct overall final acceptance according to the ship equipment acceptance standards.

[0058] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0059] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A composite chimney structure with a baffle plate, characterized in that, It includes two side wall panels, a front wall panel, a rear wall panel, a flow guide, a sealing plate, and a flue gas emission component; The front wall panel, the rear wall panel, and the two side wall panels located on the left and right sides are connected to form the chimney frame. The upper part of the rear wall panel extends backward and upward to form an inclined guide section, and the guide section of the rear wall panel is made of steel. The inner side of the guide section is covered with a guide component; The sealing plate is horizontally installed inside the chimney frame, dividing the interior of the chimney frame into upper and lower chambers. The flue gas emission component is vertically installed on the sealing plate, and the upper end of the flue gas emission component is bent in the direction of the guide component; The side panels, front panels, sealing panels, and rear panels are all made of aluminum alloy.

2. The composite chimney structure with guide vanes as described in claim 1, characterized in that, The flow guide is a flow guide plate, which is installed at an angle and the angle of inclination of the flow guide section of the rear wall plate is consistent with the angle of inclination of the flow guide section.

3. The composite chimney structure with guide vanes as described in claim 2, characterized in that, Both side wall panels have a butt plate at the upper rear end for assembly with the extension of the rear wall panel.

4. The composite chimney structure with guide vanes as described in claim 3, characterized in that, The inner cavity of the chimney frame is provided with at least one first horizontal truss structure and at least one second horizontal truss structure. The first horizontal truss structure and the second horizontal truss structure are respectively located on the upper and lower sides of the sealing plate, and both are tightly connected to the inner wall of the chimney frame. The first horizontal truss structure and the second horizontal truss structure are both made of aluminum alloy.

5. The composite chimney structure with guide vanes as described in claim 4, characterized in that, The exhaust gas device includes a first exhaust pipe and a second exhaust pipe; the first exhaust pipe and the second exhaust pipe are vertically installed on the sealing plate; wherein the lower end of the first exhaust pipe is connected to the exhaust gas outlet of the ship's main engine, and the lower end of the second exhaust pipe is connected to the exhaust gas outlet of the ship's diesel generator; the upper ends of the two exhaust pipes are bent in the direction of the guide plate.

6. The composite chimney structure with guide vanes as described in claim 5, characterized in that, The bottoms of the two side panels, the front panel, and the rear panel are all connected to the ship's deck via steel-aluminum composite joints; the rear panel is connected to the extension section via a steel-aluminum composite joint; and the butt plate is connected to the side panels via corresponding steel-aluminum composite joints.

7. The composite chimney structure with guide vanes as described in claim 6, characterized in that, Both side panels have louvered openings at the rear.

8. The composite chimney structure with guide vanes as described in claim 6, characterized in that, A vertical partition is provided below the sealing plate, which divides the inner cavity of the chimney frame below the sealing plate into two areas, front and back.

9. The composite chimney structure with guide vanes as described in claim 8, characterized in that, The partition is also equipped with vertical reinforcing ribs.

10. A method for installing a composite chimney structure with a baffle plate as described in any one of claims 7 to 9, characterized in that, The method is as follows: Step 1: Cut, bend, and prefabricate various panels, trusses, and connecting accessories according to the dimensions in the design drawings; process pipe installation holes for the sealing panels and openings for the side wall panels, and prefabricate steel-aluminum composite joints at the same time. Step 2: Assemble and fix the steel-aluminum composite joints at the bottom of the two side panels, the front panel, and the rear panel to the designated positions on the ship's deck, align and place each panel, and complete the temporary fixation of the bottom of the chimney frame. Step 3: Weld and splice the two side wall panels, front wall panel, and rear wall panel to form the chimney frame; complete the butt welding of the aluminum side wall panel and the steel rear wall panel guide section through the steel butt plate, and correct the verticality and flatness of the chimney frame. Step 4: Securely install the first horizontal truss structure and the second horizontal truss structure in the upper and lower areas of the inner cavity of the chimney frame to form a ring support; horizontally hoist the sealing plate and fix it to the upper middle part of the chimney frame to divide the inner cavity of the chimney frame into upper and lower chambers. Step 5: Vertically install and fix each exhaust pipe into the corresponding pipe mounting hole in the sealing plate, and connect them to the exhaust outlets of the ship's main engine and diesel generator respectively; adjust the bending angle of the upper end of the two exhaust pipes so that they face the direction of the guide plate; Step 6: Install the deflector at an angle on the inner surface of the deflector section of the rear wall panel, ensuring that the angle of the deflector is consistent with the angle of the deflector section, and completely cover the deflector section area; Step 7: Check the strength of the chimney structure, assembly accuracy, welding quality, and the sealing of each component connection.

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