A temporary fixing method for type B liquid cargo tanks in the cargo hold when half of the ship is floating

Abstract

The present application discloses a method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floated. The method comprises the following steps: S1, determining a temporary fixing area for the liquid cargo tank; S2, selecting a temporary fixing position for the liquid cargo tank; S3, temporarily fixing the liquid cargo tank; and S4, removing the temporary fixing of the liquid cargo tank. The type B liquid cargo tank is temporarily fixed safely and effectively during the process of floating half of the ship, thereby providing a guarantee for the subsequent continuous construction of the liquid cargo tank support system. The method is simple to operate and has low construction cost. The method solves the technical problem that the construction of the support system of the type B liquid cargo tank must be completed after entering the cabin before the half ship can be floated, thereby improving production efficiency and shortening the ship dock construction period.

Description

Technical Field

[0001] The present invention relates to the field of shipbuilding, and in particular to a method for temporarily fixing a B-type liquid cargo tank in a cargo hold when half of the ship is floating. Background Art

[0002] Each cargo hold of a very large ethane carrier is equipped with an independent B-type flat diamond liquid cargo tank. The B-type liquid cargo tank is connected to the hull through a special support system. The support system is mainly composed of a support structure, laminated wood and epoxy resin.

[0003] Due to the dock construction cycle and batches, during the construction process of a ship in the dock, half of the ship may be floated and then landed. If the laminated wood and epoxy resin at the bottom or top of the liquid cargo tank in the support system have not been installed and poured during the half-ship floating, the Type B liquid cargo tank inside the cabin will have a slight longitudinal and transverse tilt and local deformation, which will cause the liquid cargo tank to shift inside the cabin and affect the positioning accuracy of the liquid cargo tank, thereby directly affecting the ship's ability to load, unload and transport liquid cargo. In the existing technology, the half-ship must be floated after the construction of the Type B liquid cargo tank's support system inside the cabin is completed, which prolongs the ship's dock construction cycle. Therefore, during ship construction, it is urgent to solve the problem of liquid cargo tank displacement inside the ship due to the incomplete support system of the Type B liquid cargo tank when the half-ship is floated. Summary of the Invention

[0004] In response to the technical problems existing in the prior art, the present application provides a method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floated, so as to solve the problem in the prior art that the liquid cargo tank is displaced in the ship because the support system of the type B liquid cargo tank has not been completed when half of the ship is floated.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floating, comprising the following steps:

[0006] S1: Determine the temporary fixing area of ​​the cargo tank: Before floating, determine the temporary fixing area based on the loading status of the floating half-ship section and the construction status of the cargo tank support system. The temporary fixing area includes the bottom and / or top of the cargo tank;

[0007] S2: Select temporary fixing positions for the cargo tank: select multiple temporary fixing positions on the bottom and / or top of the cargo tank;

[0008] S3: Temporary fixing of cargo tanks: insert temporary fixing fixtures between the cargo tank support structure and the hull support structure at the selected temporary fixing position and tighten them firmly to ensure that the temporary fixing fixtures will not fall off during the process of half-ship floating and landing;

[0009] S4: Remove temporary fixation of liquid cargo tank: After half of the ship is raised and lowered, remove the temporary fixation tooling to ensure that the position of the liquid cargo tank in the cargo hold meets the positioning accuracy requirements after raising and lowering the pier.

[0010] In one implementation scheme, in S1, if the deck sections in the area above the liquid cargo tank have been completed and the construction of the support system for the bottom of the liquid cargo tank has not yet begun, the temporary fixing area is the bottom and top of the liquid cargo tank; if the deck sections in the area above the liquid cargo tank have been completed, and the support system for the bottom of the liquid cargo tank has been completed but the support system for the top of the liquid cargo tank has not yet been completed, the temporary fixing area is the top of the liquid cargo tank; if the deck sections in the area above the liquid cargo tank have not been completed and the construction of the support system for the bottom of the liquid cargo tank has not yet begun, the temporary fixing area is the bottom of the liquid cargo tank.

[0011] In one embodiment, when a temporary fixed position is selected at the bottom of the liquid cargo tank in S2, in the rib position area with larger bending moment along the ship length direction, the gaps between the anti-roll support structure of the liquid cargo tank bottom and the anti-roll support structure of the bottom plate in the hull at two rib positions before and after the center of gravity position are selected as temporary fixed position one and temporary fixed position two respectively, and along the ship width direction, on both sides of the bottom of the liquid cargo tank, the gaps between the anti-tilt support structure of the liquid cargo tank bottom and the anti-tilt support structure of the bottom plate in the hull before and after the center of gravity position are selected as temporary fixed position three and temporary fixed position four respectively; when a temporary fixed position is selected at the top of the liquid cargo tank, the gaps between the anti-roll support structure of the liquid cargo tank top and the hull deck beam structure at multiple rib positions on both sides of the top of the liquid cargo tank along the ship length direction are selected as the top temporary fixed position.

[0012] In one embodiment, the temporary fixing position one and the temporary fixing position two are symmetrical about the center of gravity, and the temporary fixing position three and the temporary fixing position four are symmetrical about the center of gravity.

[0013] In one embodiment, when a temporary fixed position is selected on the top of the liquid cargo tank in S2, the plurality of rib positions are evenly distributed on the top of the liquid cargo tank along the length of the ship.

[0014] In one embodiment, when selecting the temporary fixing position on the top of the liquid cargo tank in S2, the gap between the three rib-level anti-roll support structure on the top of the liquid cargo tank and the hull deck beam structure is selected as the temporary fixing position on the top.

[0015] In one embodiment, in S3, the gaps between the liquid cargo tank support structure and the support structure inside the ship at the temporary fixing position one, temporary fixing position two, temporary fixing position three and temporary fixing position four are embedded with bottom temporary fixing special tooling; the gaps between the liquid cargo tank support structure and the support structure inside the ship at the top temporary fixing position are embedded with top temporary fixing special tooling.

[0016] In one embodiment, the special tooling for temporary fixing of the bottom includes two rectangular steel pads and several wedge-shaped steel plates. Several of the wedge-shaped steel plates are stacked and welded into wedge blocks with a certain thickness. The wedge blocks and the rectangular steel pads are welded to form the special tooling for temporary fixing of the bottom.

[0017] In one embodiment, the thickness of the rectangular steel backing plate is 30 mm, and the thickness of the wedge block is 80 mm.

[0018] In one embodiment, the special tooling for temporary top fixing includes two wedge-shaped pads, which can cooperate with each other to be embedded in the gap between the liquid cargo tank support structure and the hull support structure.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present application determines the temporary fixing area of ​​the liquid cargo tank through steps S1, selects the temporary fixing position of the liquid cargo tank through S2, temporarily fixes the liquid cargo tank through S3, and removes the temporary fixing of the liquid cargo tank through S4. The type B liquid cargo tank is temporarily fixed safely and effectively during the half-ship floating process, which provides a guarantee for the subsequent continuous construction of the liquid cargo tank support system. The application is simple to operate and has the lowest construction cost. It solves the technical problem that the support system construction of the type B liquid cargo tank must be completed after entering the cabin before the half-ship can be floated, thereby improving production efficiency and shortening the ship dock construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic cross-sectional view of a half-ship equipped with a Type B liquid cargo tank in an embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the temporary fixed position of the bottom of the No. 4 Type B liquid cargo tank in the embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the temporary fixed position of the bottom of the No. 3 Type B liquid cargo tank in the embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the temporary fixed position on the top of the No. 4 Type B liquid cargo tank in the embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the special tooling for temporary fixing of the bottom in the embodiment of the present application;

[0027] Figure 6 This is a schematic diagram of the special tooling for temporary top fixation in the embodiment of the present application;

[0028] Figure 7 Schematic diagram of temporary fixation between the cargo hold bottom anti-roll support structure and the hull bottom plate anti-roll support structure in an embodiment of the present application.

[0029] Figure 8 Schematic diagram of temporary fixation between the anti-tilt support structure of the liquid cargo tank and the anti-tilt support structure of the bottom plate in the hull in the embodiment of the present application

[0030] Figure 9 Schematic diagram of temporary fixation between the anti-roll support structure on the top of the cargo tank and the hull deck beam structure in the embodiment of the present application

[0031] Figure 10 This is a flow chart of a method for temporarily securing a Type B liquid cargo tank in a cargo hold when half of the ship is floating in an embodiment of the present application;

[0032] Figure numerals: 1, half ship; 2, No. 4 Type B liquid cargo tank; 3, No. 3 Type B liquid cargo tank; 4, No. 4 Type B liquid cargo tank bottom; 5, temporary fixing position one; 6, temporary fixing position two; 7, temporary fixing position three; 8, temporary fixing position four; 9, No. 3 Type B liquid cargo tank bottom; 10, No. 4 Type B liquid cargo tank top; 11, top temporary fixing position; 100, special tooling for temporary fixing at the bottom; 1001, rectangular steel pad; 1002, wedge-shaped steel plate; 200, special tooling for temporary fixing at the top; 2001, wedge-shaped pad; 12, anti-roll support structure for liquid cargo tank bottom; 13, anti-roll support structure for bottom plate in hull; 14, anti-tilt support structure for liquid cargo tank bottom; 15, anti-tilt support structure for bottom plate in hull; 16, anti-roll support structure for liquid cargo tank top; 17, hull deck beam structure; DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention using specific embodiments. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details herein may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0034] See also Figures 1 to 10. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "front", "back", "middle" etc. quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0035] The embodiment of the present invention provides a temporary fixing method for a type B liquid cargo tank in a cargo hold when half of the ship is floating. Figure 10 As shown, the following is a specific embodiment of the fourth type B liquid cargo tank 2 and the third type B liquid cargo tank 3 when the half ship 1 is floating, combined with the attached Figure 1-9 This embodiment is described in detail, including the following steps:

[0036] S1: Determine the temporary securing area for No. 4 Type B liquid cargo tank 2 and No. 3 Type B liquid cargo tank 3.

[0037] like Figures 1 to 4 As shown, before floating, according to the loading status of the sections of the floating half-ship 1 and the construction status of the supporting systems of the No. 4 B-type liquid cargo tank 2 and the No. 3 B-type liquid cargo tank 3, the areas that need to be temporarily fixed are determined: the bottom 4 of the No. 4 B-type liquid cargo tank, the bottom 7 of the No. 3 B-type liquid cargo tank and the top 10 of the No. 4 B-type liquid cargo tank.

[0038] like Figure 1 As shown, the loading status of the floating half-ship 1 is that the deck sections in the top area of ​​the No. 4 Type B liquid cargo tank 2 have been fully loaded, while the deck sections in the top area of ​​the No. 3 Type B liquid cargo tank 3 have not yet been loaded. The bottom support systems of the No. 4 Type B liquid cargo tank 2 and the No. 3 Type B liquid cargo tank 3 have not yet been constructed. Those skilled in the art know that the bottom support system of the liquid cargo tank is constructed before the top support system of the liquid cargo tank. Therefore, the top support systems of the No. 4 Type B liquid cargo tank 2 and the No. 3 Type B liquid cargo tank 3 have not yet been constructed. The temporary fixed areas are the bottom 4 of the No. 4 Type B liquid cargo tank, the bottom 9 of the No. 3 Type B liquid cargo tank, and the top 10 of the No. 4 Type B liquid cargo tank.

[0039] In one embodiment, if the deck sections in the area above the liquid cargo tank have been completed and the construction of the support system for the bottom of the liquid cargo tank has not yet begun, the temporary fixing area is the bottom and top of the liquid cargo tank; if the deck sections in the area above the liquid cargo tank have been completed, and the support system for the bottom of the liquid cargo tank has been completed but the support system for the top of the liquid cargo tank has not yet been completed, the temporary fixing area is the top of the liquid cargo tank; if the deck sections in the area above the liquid cargo tank have not been completed and the construction of the support system for the bottom of the liquid cargo tank has not yet begun, the temporary fixing area is the bottom of the liquid cargo tank.

[0040] S2: Select temporary fixing positions for the cargo tank: Select multiple temporary fixing positions on the bottom and / or top of the cargo tank.

[0041] like Figures 2 to 4 As shown, according to the weight and center of gravity of the No. 4 B type liquid cargo tank 2 and the No. 3 B type liquid cargo tank 3 that need to be temporarily fixed, the calculation results of NAPABASIC (the naval architectural package ship overall design software) on the bending moment distribution in the liquid cargo tank area when the half ship 1 is floated, and in order to control the risk of floating the half ship, the assumed results of the center of gravity offset and weight increase and decrease of the floating half ship calculated by NAPABASIC are used. At the same time, considering that the half ship 1 may slightly list when floating, temporary fixing positions 1, 5, 6, 7, 8 and multiple top temporary fixing positions 11 are selected in the bottom 4 of the No. 4 B type liquid cargo tank and the top 10 of the liquid cargo tank, and temporary fixing positions 1, 5, 6, 7 and 8 are selected in the bottom 7 of the No. 3 B type liquid cargo tank.

[0042] like Figure 2 The weight of the No. 4 B type cargo tank 2 is shown to be 1430.71 tons, the center of gravity in the ship's length direction is located at FR71+40mm, and according to the bending moment distribution of the No. 4 B type cargo tank 2 area when the half ship 1 is floating (the bending moment in the FR60 to FR80 rib area is relatively large) calculated by NAPABASIC, in order to prevent the No. 4 B type cargo tank 2 from heeling, the gaps between the cargo tank bottom anti-roll support structure 12 and the hull bottom plate anti-roll support structure 13 at the two ribs FR65 and FR77 with larger bending moments are selected before and after the center of gravity of the No. 4 B type cargo tank bottom 4 area as temporary fixing position 1 5 and temporary fixing position 2 6, wherein the temporary fixing position 1 5 and the temporary fixing position 2 6 are symmetrical about the center of gravity.

[0043] like Figure 3The weight of the No. 3 B type cargo tank 3 is shown to be 1474.58 tons, the center of gravity in the ship's length direction is located at FR120+243mm, and according to the bending moment distribution of the No. 3 B type cargo tank 3 area when the half ship 1 is floating (the bending moment in the area between FR110 and FR130 is relatively large), in order to prevent the No. 3 B type cargo tank 3 from heeling, the gaps between the cargo tank bottom anti-roll support structure 12 and the hull bottom plate anti-roll support structure 13 at two ribs FR114 and FR126 with larger bending moments are selected before and after the center of gravity of the No. 3 B type cargo tank bottom 7 as temporary fixing position 1 5 and temporary fixing position 2 6, wherein the temporary fixing position 1 5 and the temporary fixing position 2 6 are symmetrical about the center of gravity.

[0044] like Figure 2 、 3 As shown, in order to prevent the fourth type B liquid cargo tank 2 and the third type B liquid cargo tank 3 from being displaced in the direction of the ship length, in the area of ​​the bottom 4 of the fourth type B liquid cargo tank and the bottom 9 of the third type B liquid cargo tank, the gaps between the liquid cargo tank bottom anti-tilt support structure 14 and the hull bottom plate anti-tilt support structure 15 on both sides of the liquid cargo tank bottom in the ship width direction and before and after the center of gravity are selected as temporary fixing position three 7 and temporary fixing position four 8 respectively.

[0045] like Figure 4 As shown, in order to prevent heeling, the gaps between the anti-roll support structure 16 on the top of the cargo tank and the hull deck beam structure 17 at three rib positions (FR54, FR69 and FR89) are taken evenly along the length of the ship on both sides of the top 10 of the No. 4 B type cargo tank as temporary top fixing positions 11. There are a total of six temporary top fixing positions 11 on the top 10 of the No. 4 B type cargo tank, and the temporary top fixing positions 11 on one side are symmetrical with those on the other side about the center axis of the cargo tank.

[0046] S3: Temporary fixation of liquid cargo tanks: insert temporary fixation special tooling between the liquid cargo tank support structure and the hull support structure at the selected temporary fixation position and tighten them firmly to ensure that the temporary fixation special tooling will not fall off during the process of half-ship floating and landing.

[0047] The temporary fixation tooling components include a bottom temporary fixation tooling component 100 and a top temporary fixation tooling component 200 .

[0048] like Figure 7 As shown, the temporary fixing position 1 5 and the temporary fixing position 2 6 of the bottom 4 of the No. 4 type B liquid cargo tank and the bottom 9 of the No. 3 type B liquid cargo tank are temporarily fixed: the special tooling 100 for temporary bottom fixing is embedded in the gap between the bottom anti-roll support structure 12 and the hull bottom plate anti-roll support structure 13, and is tightened firmly to ensure that the special tooling 100 for temporary bottom fixing will not fall off during the process of half-ship floating and landing.

[0049] like Figure 8 As shown, the temporary fixing positions of the bottom 4 of the No. 4 type B liquid cargo tank and the bottom 9 of the No. 3 type B liquid cargo tank are temporarily fixed at temporary fixing position three 7 and temporary fixing position four 8: the special tooling parts 100 for temporary fixing of the bottom are embedded in the gap between the anti-tilt support structure 14 and the anti-tilt support structure 15 of the bottom plate inside the hull, and are firmly tightened to ensure that the special tooling parts 100 for temporary fixing of the bottom will not fall off during the process of raising and lowering the half-ship.

[0050] like Figure 5 As shown, the bottom temporary fixing special tooling part 100 includes two rectangular steel pads 1001 with a thickness of 30 mm and several wedge-shaped steel plates 1002. The wedge-shaped steel plates 1002 are stacked and welded into wedge blocks with a thickness of about 80 mm, and are welded with the rectangular steel pads 1001 to form the temporary fixing special tooling part 100.

[0051] like Figure 6 、 Figure 9 As shown, the top temporary fixing location 11 of the No. 4 Type B cargo tank 10 is temporarily secured: a dedicated top temporary fixing fixture 200 is inserted into the gap between the cargo tank's top anti-roll support structure 16 and the hull deck beam structure 17 and securely fastened to ensure it does not fall off during the half-ship raising and lowering process. The dedicated top temporary fixing fixture 200 comprises two wedge-shaped shims 2001, which fit together to fit into the gap between the cargo tank support structure and the hull support structure.

[0052] S4. Remove temporary fixation of liquid cargo tank: After half of the ship is raised and lowered, remove the special tooling for temporary fixation to ensure that the position of the liquid cargo tank in the cargo hold meets the positioning accuracy requirements after raising and lowering the pier.

[0053] In summary, the method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floating of the present invention solves the technical problem that the construction of the support system of the type B liquid cargo tank must be completed after the type B liquid cargo tank enters the cabin before the half-ship can be floated. During the floating of the half-ship, the type B liquid cargo tank is temporarily fixed safely and effectively, and the positioning accuracy of the liquid cargo tank in the cargo hold after floating and landing is well guaranteed, which provides a guarantee for the subsequent continuous construction of the liquid cargo tank support system, improves production efficiency, and shortens the ship dock construction period.

[0054] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floating, characterized in that: The following steps are involved: S1: Determine the temporary fixing area of ​​the cargo tank: Before floating, determine the temporary fixing area based on the loading status of the floating half-ship section and the construction status of the cargo tank support system. The temporary fixing area includes the bottom and / or top of the cargo tank; S2: Select temporary fixing positions for the cargo tank: select multiple temporary fixing positions on the bottom and / or top of the cargo tank; S3: Temporary fixing of cargo tanks: insert temporary fixing fixtures between the cargo tank support structure and the hull support structure at the selected temporary fixing position and tighten them firmly to ensure that the temporary fixing fixtures will not fall off during the process of half-ship floating and landing; S4: Dismantle temporary fixings of liquid cargo tanks: After half of the ship is raised and lowered, remove the temporary fixing tooling to ensure that the position of the liquid cargo tanks in the cargo hold meets the positioning accuracy requirements after the ship is raised and lowered; In S1, if the deck sections in the area above the cargo tanks have been completed and the construction of the supporting system for the bottom of the cargo tanks has not yet begun, the temporary fixing areas shall be the bottom and top of the cargo tanks; if the deck sections in the area above the cargo tanks have been completed and the supporting system for the bottom of the cargo tanks has been completed but the supporting system for the top of the cargo tanks has not yet been completed, the temporary fixing area shall be the top of the cargo tanks; if the deck sections in the area above the cargo tanks have not been completed and the construction of the supporting system for the bottom of the cargo tanks has not yet begun, the temporary fixing area shall be the bottom of the cargo tanks.

2. The method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floating according to claim 1, characterized in that: In S2, when selecting the temporary fixing position at the bottom of the liquid cargo tank, in the rib area with larger bending moment along the ship length direction, the gaps between the liquid cargo tank bottom anti-roll support structure and the hull bottom plate anti-roll support structure at two rib positions before and after the center of gravity position are selected as temporary fixing position one and temporary fixing position two respectively; along the ship width direction, on both sides of the liquid cargo tank bottom, the gaps between the liquid cargo tank bottom anti-tilt support structure and the hull bottom plate anti-tilt support structure before and after the center of gravity position are selected as temporary fixing position three and temporary fixing position four respectively; when selecting the temporary fixing position at the top of the liquid cargo tank, the gaps between the liquid cargo tank top anti-roll support structure and the hull deck beam structure at multiple rib positions on both sides of the liquid cargo tank top along the ship length direction are selected as the top temporary fixing positions.

3. The method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floating according to claim 2, characterized in that: The first temporary fixing position and the second temporary fixing position are symmetrical about the center of gravity, and the third temporary fixing position and the fourth temporary fixing position are symmetrical about the center of gravity.

4. The method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floating according to claim 2, characterized in that: When a temporary fixed position is selected on the top of the liquid cargo tank in S2, the plurality of rib positions are evenly distributed on the top of the liquid cargo tank along the length of the ship.

5. The method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floating according to claim 4, characterized in that: When selecting the temporary fixing position on the top of the liquid cargo tank in S2, the gap between the three-rib anti-roll support structure on the top of the liquid cargo tank and the hull deck beam structure is selected as the temporary fixing position on the top.

6. The method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floating according to claim 2, characterized in that: In S3, the gaps between the liquid cargo tank support structure and the support structure inside the ship at the temporary fixing position one, temporary fixing position two, temporary fixing position three and temporary fixing position four are embedded with the bottom temporary fixing special tooling; the gaps between the liquid cargo tank support structure and the support structure inside the ship at the top temporary fixing position are embedded with the top temporary fixing special tooling.

7. The method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floating according to claim 6, characterized in that: The bottom temporary fixing tool comprises two rectangular steel pads and several wedge-shaped steel plates. Several of the wedge-shaped steel plates are stacked and welded into wedge blocks. The wedge blocks and the rectangular steel pads are welded to form the bottom temporary fixing tool.

8. The method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floating according to claim 7, characterized in that: The thickness of the rectangular steel backing plate is 30 mm, and the thickness of the wedge block is 80 mm.

9. The method for temporarily fixing a type B liquid cargo tank in a cargo hold when half of the ship is floating according to claim 6, characterized in that: The special tooling for temporary top fixing includes two wedge-shaped pads, which can cooperate with each other to be embedded in the gap between the liquid cargo tank support structure and the hull support structure.

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