A construction method for the liquid dome area of ​​a dual-fuel container ship

Abstract

The present invention relates to a construction method for the liquid dome area of ​​a dual-fuel container ship, comprising the following steps: arranging a patch assembly on top of the dome section; performing integrity loading of the fuel tank ring section; loading the dome section and hatch coaming segment on top of the fuel tank; performing an empty tank tightness test near the fuel tank; constructing the fuel tank containment system; installing outfitting components on the top deck of the fuel tank; upon completion of the containment system, lifting the liquid dome main room off and installing a composite dome cover; and loading the patch assembly. The construction method for the liquid dome area of ​​a dual-fuel container ship of the present invention allows for the construction of the containment system to be carried out simultaneously with the outfitting of the fuel tank top deck area, thereby shortening the construction period of the container ship at the dock or pier.

Description

Technical Field

[0001] The present invention relates to the field of shipbuilding, and in particular to a construction method for a liquid dome area of ​​a dual-fuel container ship. Background Art

[0002] Currently, ultra-large dual-fuel containerships often construct their containment systems first, followed by the installation of bulkheads. However, on some dual-fuel containerships, the void space boundaries near the fuel tanks include the boundaries of the deck rooms and hatch coamings. Before constructing the containment systems on these dual-fuel containerships, a void space tightness test is required. Furthermore, before this test, the deck rooms and hatch coaming sections must be installed. Furthermore, the fuel tank decks within the rooms of these dual-fuel containerships often contain a large number of bulk cryogenic pipes, and some outfitting components on the room bulkheads cannot be pre-installed during the sectioning phase. If the containment system is constructed first, followed by the installation of bulkheads, installation of the deck cryogenic piping and the outfitting components on the cabin bulkheads will be difficult, impacting the construction period at the dock and pier.

[0003] In addition, after the room section is installed, the liquid dome port will be blocked, and a process hole needs to be opened on the room section. However, since there are a large number of outfitting parts on the top of the room, opening the process hole will inevitably affect the installation of the outfitting parts on the top. Summary of the Invention

[0004] In order to solve the technical problems existing in the prior art, the present invention provides a construction method for the liquid dome area of ​​a dual-fuel container ship. Through an "L"-shaped patching assembly solution, the subsequent containment system can be smoothly constructed.

[0005] To achieve the above object, the technical solutions of the present invention are as follows:

[0006] A construction method for a liquid dome area of ​​a dual-fuel container ship, the method comprising the following steps:

[0007] Step 1: Setting up the patch assembly on the top of the dome segment;

[0008] Step 2: Carry out integrity loading of fuel tank ring segment;

[0009] Step 3: Load the dome section and hatch coaming sections on top of the fuel tank;

[0010] Step 4: Conduct an empty tank tightness test near the fuel tank;

[0011] Step 5: Carry out the construction of fuel tank containment system;

[0012] Step 6: Install bulk cryogenic pipes and outfitting on the top deck of the fuel tank;

[0013] Step 7: After the enclosure system is completed, the liquid dome room is lifted out and the composite dome cover is installed;

[0014] Step eight, carry out patching assembly.

[0015] As a preferred technical solution, in step one, the cross-sectional shape of the patch assembly is "L"-shaped, and the patch assembly is located directly above the liquid dome base of the fuel tank.

[0016] As a preferred technical solution, the edge of the liquid dome base is close to the rear bulkhead of the dome section, and the liquid dome large room is arranged between the liquid dome base and the patching assembly.

[0017] As a preferred technical solution, a cover is provided on the liquid dome base, and a material port is provided on the cover.

[0018] As a preferred technical solution, in step eight, after the patching assembly is loaded, a temporary process hole is opened on the deck, and the size of the temporary process hole is larger than the size of the material opening.

[0019] As a preferred technical solution, in step one, the dome section includes a dome left segment and a dome right segment, the two ends of the patchwork assembly are respectively connected to the dome left segment and the dome right segment, and the outfitting parts of the deck top are installed during the assembly stage.

[0020] As a preferred technical solution, in step three, the dome section and the hatch coaming section share a bulkhead, and the dome section is loaded first, followed by the hatch coaming section.

[0021] As a preferred technical solution, in step seven, before patching and assembling, an opening is provided on the dome section, and the composite dome cover is hoisted in through the opening.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The present invention provides a construction method for the liquid dome area of ​​a dual-fuel container ship. By first loading the dome section and the hatch coaming section, the method ensures the smooth progress of the empty compartment tightness test and creates conditions for the construction of the containment system.

[0024] (2) The construction method for the liquid dome area of ​​a dual-fuel container ship of the present invention creates conditions for the installation of the enclosure system and the deck low-temperature piping system by opening an "L"-shaped process hole, which is conducive to shortening the dock and wharf cycle.

[0025] (3) The present invention provides a construction method for the liquid dome area of ​​a dual-fuel container ship, which solves the problem of process holes affecting the installation of counter-top outfitting parts by installing a composite dome cover and carrying a patch assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of the fuel tank and dome section in a construction method for the liquid dome area of ​​a dual-fuel container ship according to the present invention;

[0027] Figure 2 It is a cross-sectional view of the boundary between the fuel tank and the void tank in a construction method for the liquid dome area of ​​a dual-fuel container ship according to the present invention;

[0028] Figure 3 It is a structural schematic diagram of a patching assembly in a construction method for a liquid dome area of ​​a dual-fuel container ship in the present invention.

[0029] In the figure: 1. Fuel tank; 2. Dome left section; 3. Dome right section; 4. Inlay assembly; 5. Hatch coaming section; 6. Dome section; 7. Void tank; 8. Liquid dome base. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described below in conjunction with specific embodiments:

[0031] A construction method for a liquid dome area of ​​a dual-fuel container ship, the method comprising the following steps:

[0032] Step 1, such as Figure 1 As shown, a patching assembly 4 is provided on the top of the dome section 6, as shown in FIG. Figure 3 As shown, the cross-sectional shape of the patch assembly 4 is "L"-shaped. The patch assembly 4 is located directly above the liquid dome base 8 of the fuel tank 1. Therefore, the installation of the dome section 6 will not affect the construction of the containment system of the fuel tank 1. The dome section 6 includes the dome left segment 2 and the dome right segment 3. The two ends of the patch assembly 4 are respectively connected to the dome left segment 2 and the dome right segment 3. The outfitting parts of the deck top are installed during the assembly stage. The edge of the liquid dome base 8 is close to the rear bulkhead of the dome section 6, and a large liquid dome room cannot be placed. Therefore, the liquid dome room can only be set above the liquid dome base 8. The liquid dome room is located below the patch assembly 4. The liquid dome room is used to ensure the humidity and temperature in the cabin during the construction of the containment system.

[0033] Step 2: Carry out integrity loading of the fuel tank 1 ring segment;

[0034] Step 3: Load the dome section 6 and the hatch coaming section 5 on top of the fuel tank 1. The dome section 6 and the hatch coaming section 5 share a bulkhead. Load the dome section 6 first, then the hatch coaming section 5.

[0035] Step 4: Figure 2 As shown, a tightness test of the empty tank 7 is carried out near the fuel tank 1;

[0036] Step 5: Carry out the construction of the containment system of the fuel tank 1;

[0037] Step 6: Install bulk cryogenic pipes and outfitting on the top deck of the fuel tank 1. There are many bulk cryogenic pipes on the top deck of the fuel tank 1. First, hoist the dome section 6, and then carry out the enclosure system construction, so that the installation of cryogenic pipes can be carried out in advance;

[0038] Step 7: After the containment system is completed, the liquid dome room is lifted off. An opening is provided on the dome section 6, the shape and size of which match the "L"-shaped patch assembly 4. The composite dome cover is lifted in through the opening. Due to the size of the opening, the lifting ring of the composite dome cover is installed in the width direction of the ship.

[0039] Step 8: Install the patching assembly 4 at the opening, then create a temporary process hole on the deck for materials to enter and exit the cargo tank. The liquid dome base 8 is equipped with a lid with a material port for the containment system scaffolding to exit the tank. The temporary process hole is slightly larger than the material port.

[0040] This embodiment is only a further explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A construction method for the liquid dome area of ​​a dual-fuel container ship, characterized in that: The method comprises the following steps: Step 1: Setting up the patch assembly on the top of the dome segment; Step 2: Carry out integrity loading of fuel tank ring segment; Step 3: Load the dome section and hatch coaming sections on top of the fuel tank; Step 4: Conduct an empty tank tightness test near the fuel tank; Step 5: Carry out the construction of fuel tank containment system; Step 6: Install bulk cryogenic pipes and outfitting on the top deck of the fuel tank; Step 7: After the enclosure system is completed, the liquid dome room is lifted out and the composite dome cover is installed; Step eight, carry out patching assembly.

2. A construction method for the liquid dome area of ​​a dual-fuel container ship according to claim 1, characterized in that: In the step 1, the cross-sectional shape of the patch assembly is "L"-shaped, and the patch assembly is located directly above the liquid dome base of the fuel tank.

3. A construction method for the liquid dome area of ​​a dual-fuel container ship according to claim 2, characterized in that: The edge of the liquid dome base is close to the rear bulkhead of the dome section, and the liquid dome large room is arranged between the liquid dome base and the patching assembly.

4. A construction method for the liquid dome area of ​​a dual-fuel container ship according to claim 2, characterized in that: The liquid dome base is provided with a cover, and the cover is provided with a material port.

5. A construction method for the liquid dome area of ​​a dual-fuel container ship according to claim 4, characterized in that: In the step eight, after the patching assembly is mounted, a temporary process hole is opened on the deck, and the size of the temporary process hole is larger than the size of the material opening.

6. The construction method for the liquid dome area of ​​a dual-fuel container ship according to claim 1, characterized in that: In step 1, the dome section includes a left dome segment and a right dome segment, the two ends of the patch assembly are respectively connected to the left dome segment and the right dome segment, and the outfitting of the deck top is installed during the assembly stage.

7. The construction method for the liquid dome area of ​​a dual-fuel container ship according to claim 1, characterized in that: In the step three, the dome section and the hatch coaming section share a bulkhead, and the dome section is loaded first, and then the hatch coaming section is loaded.

8. The construction method for the liquid dome area of ​​a dual-fuel container ship according to claim 1, characterized in that: In the step seven, before the patching assembly is mounted, an opening is provided on the dome section, and the composite dome cover is hoisted in through the opening.

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