Combined independent liquid cargo tank and installation method thereof
Through the combined independent cargo tank design, the protruding parts of the first cargo tank and the second cargo tank are constructed and welded in parallel, which solves the problems of long construction cycle, high cost and safety hazards of large cargo tanks of liquefied gas ships, and achieves an efficient and safe construction process.
Patent Information
- Application Number
- CN202410098051.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2025-07-25
AI Technical Summary
The large cargo tanks of liquefied gas ships have problems such as long construction cycle, high cost and safety hazards during the lifting and closing process. In particular, the independent cargo tanks cannot be lifted and transported as a whole, which increases the difficulty and risk of construction.
The combined independent cargo tank design is adopted. By setting up multiple protrusions on the bottom surface of the first cargo tank and the top surface of the second cargo tank, it is constructed and welded in parallel. The top surface of the second cargo tank is used as a construction platform to reduce the workload of closing welding, reduce costs and improve safety.
It realizes parallel construction of single cabins, shortens construction cycle, reduces welding workload, reduces construction costs, and improves construction safety.
Smart Images
Figure CN120364083A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of shipbuilding, and in particular to a combined independent liquid cargo tank and an installation method thereof. Background Art
[0002] The cargo tank is the inner structure of a liquefied gas carrier for loading cryogenic liquid cargo. With the development of large-scale liquefied gas carriers, the cargo tank capacity has gradually increased, which is conducive to improving the economic efficiency of cargo transportation, but at the same time poses huge challenges to the structural design, construction safety, efficiency and cost of the cargo tank. Especially for independent cargo tanks, when the cargo tank capacity increases, the overall lifting and transshipment of the cargo tank cannot be achieved under the condition of limited hoisting and transshipment capacity of the shipyard. The overall cargo tank needs to be divided into at least two parts, and multiple tanks need to be closed and insulated in the cargo hold of the ship, which greatly increases the construction period and cost, and there are safety hazards such as fire. Summary of the invention
[0003] In view of the shortcomings of the prior art described above, the present invention provides a combined independent liquid cargo tank and an installation method thereof, respectively providing a first liquid cargo tank and a second liquid cargo tank, wherein the bottom surface of the first liquid cargo tank has a plurality of first protrusions, and the top surface of the second liquid cargo tank has a plurality of second protrusions, and the plurality of first protrusions are connected one by one with the plurality of second protrusions, thereby forming a combined independent liquid cargo tank. The first liquid cargo tank and the second liquid cargo tank can be independently constructed in parallel with the hull cargo tank structure, and then the two can be assembled, thereby realizing the parallel construction, transshipment and hoisting of a single tank, shortening the construction period and reducing the construction difficulty; by welding and connecting the plurality of first protrusions with the plurality of second protrusions, the first liquid cargo tank and the second liquid cargo tank can be connected, thereby reducing the workload of closing welding, etc.; the installation method provided by the present invention does not require the erection of scaffolding for the closing welding of the two liquid cargo tanks, thereby reducing the construction cost and improving the construction safety.
[0004] To achieve the above-mentioned and other related purposes, the present invention provides a method for installing a combined independent liquid cargo tank, comprising the following steps:
[0005] A first liquid cargo tank is provided, wherein the bottom surface of the first liquid cargo tank has a plurality of first protrusions arranged in an array, and first supporting members are symmetrically arranged on the outer sides of the first protrusions;
[0006] A second liquid cargo tank is provided, wherein the top surface of the second liquid cargo tank has a plurality of second protrusions arranged in an array, the second protrusions have an arc structure, and second support members are symmetrically arranged on the outer sides of the second protrusions;
[0007] placing the first liquid cargo tank above the second liquid cargo tank so that the plurality of first protrusions correspond to the plurality of second protrusions one by one, and connecting the first protrusions to the second protrusions by welding;
[0008] Install laminated wood between the first support member and the second support member.
[0009] Optionally, a first tabletop is provided inside the first protrusion, and the first tabletop is perpendicular to the first protrusion; a second tabletop is provided inside the second protrusion, and the second tabletop is parallel to the first tabletop.
[0010] Optionally, first through holes are provided on both the first tabletop and the second tabletop for allowing liquid cargo to flow from the first liquid cargo hold into the second liquid cargo hold.
[0011] Optionally, the first support member includes a transition plate and a first elbow plate, the transition plate is located between the first elbow plate and the first protrusion, and the transition plate and the first elbow plate are in the same plane.
[0012] Optionally, the first support member further includes a first panel, which is located between the transition plate and the first elbow plate and is perpendicular to the transition plate and the first elbow plate.
[0013] Optionally, the second support member includes a second elbow plate and a second panel, the second elbow plate is located between the second protrusion and the second panel, and the second elbow plate is perpendicular to the second panel.
[0014] Optionally, the laminated wood has two opposite side edges, one of which has a gap with the first panel, and the other side edge is fixedly connected to the second panel through an adhesive.
[0015] Optionally, a third elbow plate is provided on the upper surface of the first tabletop, and the third elbow plate is perpendicular to the first tabletop.
[0016] Optionally, a fourth elbow plate is provided on the upper surface of the second tabletop, and a fifth elbow plate is provided on the lower surface of the second tabletop, and the third elbow plate, the fourth elbow plate and the fifth elbow plate are in the same plane.
[0017] The present invention also provides a combined independent liquid cargo hold formed by the installation method of the combined independent liquid cargo hold according to any one of the above.
[0018] The combined independent liquid cargo hold and its installation method provided by the present invention have at least the following beneficial effects:
[0019] 1) The first liquid cargo hold and the second liquid cargo hold can be independently constructed in parallel with the hull cargo hold structure, and then the two are assembled, so as to realize the parallel construction, barge transportation and hoisting of a single hold, shorten the construction period and reduce the construction difficulty;
[0020] 2) By connecting multiple first protrusions and multiple second protrusions through welding, the connection between the first liquid cargo tank and the second liquid cargo tank is achieved, significantly reducing the weld length and the amount of work such as closing welding.
[0021] 3) The present invention utilizes the top surface of the second liquid cargo tank and the second tabletop as a construction platform, eliminating the need to erect scaffolding, reducing the construction cost and improving the construction safety. Description of the Drawings
[0022] Figure 1a It shows a partial structural schematic diagram of the bottom surface of the first liquid cargo tank provided in step S1 of the first embodiment.
[0023] Figure 1b It shows a layout schematic diagram of the first protrusions on the bottom surface of the first liquid cargo tank provided in step S1 of the first embodiment.
[0024] Figure 2 It shows a partial structural schematic diagram of the top surface of the second liquid cargo tank provided in step S2 of the first embodiment.
[0025] Figure 3 It shows a structural schematic diagram of the combined independent liquid cargo tank provided in step S3 of the first embodiment.
[0026] Figure 4 It shows a partial structural schematic diagram of the combined independent liquid cargo tank provided in step S3 of the first embodiment.
[0027] Figure 5 It shows a top view of the first tabletop provided in the first embodiment.
[0028] Element Number Description
[0029] 100 First liquid cargo tank 42 Second gusset plate
[0030] 200 Second liquid cargo tank 43 Third gusset plate
[0031] 10 First protrusion 44 Fourth gusset plate
[0032] 20 Second protrusion 45 Fifth gusset plate
[0033] 11 First tabletop 51 First through hole
[0034] 12 Transition plate 52 Second through hole
[0035] 21 Second tabletop 53 Third through hole
[0036] 22 Arc structure 61 First panel
[0037] 23 Reinforcing rib 62 Second panel
[0038] 31 First longitudinal bulkhead 70 Laminated wood
[0039] 32 Second longitudinal bulkhead 80 Adhesive
[0040] 41 First bracket Detailed implementation manners
[0041] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
[0042] It should be noted that the drawings provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Although only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape, and size of the components in actual implementation, the forms, quantities, positional relationships, and proportions of the components in actual implementation can be arbitrarily changed on the premise of implementing the technical solution of the present invention, and the component layout form may also be more complex.
[0043] Embodiment 1
[0044] This embodiment provides an installation method for a combined independent liquid cargo tank, including the following steps:
[0045] S1: Provide a first liquid cargo tank. The bottom surface of the first liquid cargo tank has a plurality of first protrusions arranged in an array, and first support members are symmetrically arranged outside the first protrusions;
[0046] As Figure 1a shown, provide a first liquid cargo tank 100. The first liquid cargo tank 100 has a first longitudinal bulkhead 31 inside. The bottom surface of the first liquid cargo tank 100 has a plurality of first protrusions 10 arranged in an array. The plurality of first protrusions 10 are used to connect with a second liquid cargo tank 200 in subsequent steps. As an example, the number of the first protrusions 10 is at least nine, and the number of the first protrusions 10 can be appropriately increased according to the tank capacity of the first liquid cargo tank 100 to ensure that the horizontal and vertical load-bearing meets the structural safety requirements and the functional requirements for the up and down flow of the liquid cargo; in this embodiment, nine first protrusions 10 are arranged in a three-row and three-column form on the bottom surface of the first liquid cargo tank 100. As Figure 1b shown, three first protrusions 10 are located directly below the first longitudinal bulkhead 31, and the remaining first protrusions 10 are located on both sides of the first longitudinal bulkhead 31. In this embodiment, the first protrusions 10 located directly below the first longitudinal bulkhead 31 are taken as an example for description.
[0047] As Figure 1aAs shown, a first tabletop 11 is provided inside the first protrusion 10, and the first tabletop 11 is perpendicular to the first protrusion 10. As Figure 5 shown, two first through-holes 51 arranged side by side are provided on the first tabletop 11, respectively located on both sides of the first longitudinal bulkhead 31, for allowing the liquid cargo to flow from the first liquid cargo tank 100 into the second liquid cargo tank 200; two second through-holes 52 arranged side by side are also provided on the first tabletop 11, respectively located on both sides of the first longitudinal bulkhead 31, for loading and unloading the cargo pump.
[0048] As Figure 1a shown, a third gusset plate 43 is provided on the upper surface of the first tabletop 11, and the third gusset plate 43 is perpendicular to the first tabletop 11 and the first protrusion 10, for bearing the lateral load. As an example, in the Figure 1b shown Y-axis direction, at least three third gusset plates 43 are provided on the upper surface of the first tabletop 11. In particular, for the first tabletop 11 directly below the first longitudinal bulkhead 31, each third gusset plate 43 is divided into two parts by the first longitudinal bulkhead 31, referring to Figure 1a shown. In this embodiment, three third gusset plates 43 are provided on the upper surface of the first tabletop 11. Combining Figure 5 shown, the three third gusset plates 43 are respectively located between and on both sides of the first through-holes 51 and the second through-holes 52.
[0049] As Figure 1a shown, the bottom of the third gusset plate 43 has a third through-hole 53 for allowing the liquid cargo to flow through. As an example, the third through-hole 53 is of a semi-circular structure. For the third gusset plate 43 divided into two parts by the first longitudinal bulkhead 31, the third through-hole 53 is also divided into two parts; in addition, the radius of the third through-hole 53 is at least 75 mm.
[0050] As Figure 1a shown, first supports are symmetrically provided outside the first protrusion 10. From near the first protrusion 10 to far from the first protrusion 10, the first supports successively include a transition plate 12, a first panel 61, and a first gusset plate 41. As an example, the transition plate 12, the first gusset plate 41, and the third gusset plate 43 are in the same plane; the first panel 61 is located between the transition plate 12 and the first gusset plate 41 and is perpendicular to the transition plate 12 and the first gusset plate 41.
[0051] S2: Provide a second liquid cargo tank. The top surface of the second liquid cargo tank has a plurality of second protrusions arranged in an array. The second protrusions have an arc-shaped structure, and second supports are symmetrically provided outside the second protrusions;
[0052] As Figure 2As shown, a second liquid cargo tank 200 is provided. Inside the second liquid cargo tank 200, there is a second longitudinal bulkhead 32. On the top surface of the second liquid cargo tank 200, there are multiple second protrusions 20 arranged in an array. The multiple second protrusions 20 are used to dock with the multiple first protrusions 10 of the first liquid cargo tank 100. Therefore, the number of the second protrusions 20 is the same as that of the first protrusions 10. In this embodiment, nine second protrusions 20 are arranged in a three-row and three-column form on the top surface of the second liquid cargo tank 200. Among them, three second protrusions 20 are located directly above the second longitudinal bulkhead 32, and the remaining second protrusions 20 are located on both sides of the second longitudinal bulkhead 32. In this embodiment, the second protrusion 20 located directly above the second longitudinal bulkhead 32 is taken as an example for illustration.
[0053] As Figure 2 shown, the second protrusion 20 has an arc structure 22. After the subsequent docking of the first liquid cargo tank 100 and the second liquid cargo tank 200 is completed, the first liquid cargo tank 100 and the second liquid cargo tank 200 are prone to multi-directional deformation under the action of the static load, dynamic load and thermal stress of loading and unloading of the liquid cargo. The arc structure 22 can effectively compensate for the shrinkage deformation and play an elastic support role.
[0054] As Figure 2 shown, a second table surface 21 is arranged inside the second protrusion 20. The second table surface 21 is parallel to the first table surface 11. As an example, two first through holes 51 and two second through holes 52 are also arranged on the second table surface 21. After the second protrusion 20 is docked with the first protrusion 10, the first through holes 51 on the first table surface 11 and the second table surface 21 are coaxial, which is used to allow the liquid cargo to flow from the first liquid cargo tank 100 into the second liquid cargo tank 200. At the same time, the second through holes 52 on the first table surface 11 and the second table surface 21 are coaxial, which is used for loading and unloading the cargo pump.
[0055] As Figure 2 shown, a fourth knee plate 44 is arranged on the upper surface of the second table surface 21, and a fifth knee plate 45 is arranged on the lower surface of the second table surface 21. The fourth knee plate 44 and the fifth knee plate 45 are in the same plane, and both are perpendicular to the second table surface 21 and the second protrusion 20, which is used to bear the lateral load. As an example, after the first liquid cargo tank 100 and the second liquid cargo tank 200 are docked, the third knee plate 43, the fourth knee plate 44 and the fifth knee plate 45 are in the same plane, and the number of the three is the same. Therefore, in this embodiment, three fourth knee plates 44 and three fifth knee plates 45 are respectively arranged on the upper and lower surfaces of the second table surface 21. For the second table surface 21 located directly above the second longitudinal bulkhead 32, each fourth knee plate 44 and fifth knee plate 45 is also divided into two parts by the second longitudinal bulkhead 32. Refer to Figure 2 shown.
[0056] As Figure 2As shown, the bottom of the fourth gusset plate 44 has a third through hole 53 for the circulation of liquid cargo. As an example, the third through hole 53 is of a semi-circular structure. For the fourth gusset plate 44 separated into two parts by the second longitudinal bulkhead 32, the third through hole 53 is also separated into two parts; in addition, the radius of the third through hole 53 is at least 75 mm.
[0057] As Figure 2 shown, second support members are symmetrically arranged outside the second protrusion 20. From near the second protrusion 20 to far from the second protrusion 20, the second support members successively include a second gusset plate 42 and a second panel 62. As an example, the second gusset plate 42 is located between the second protrusion 20 and the second panel 62. The second gusset plate 42, the fourth gusset plate 44, and the fifth gusset plate 45 are in the same plane, and the second gusset plate 42 is perpendicularly arranged with the second panel 62. As an example, reinforcing ribs 23 are also arranged on the second gusset plate 42. The reinforcing ribs 23 and the second tabletop 21 are in the same plane and are used to strengthen and support the second gusset plate 42.
[0058] S3: Place the first liquid cargo tank above the second liquid cargo tank, make the multiple first protrusions correspond to the multiple second protrusions one by one, and connect the first protrusions and the second protrusions by welding;
[0059] First, install multiple supports in the hull cargo hold, and hoist the second liquid cargo tank 200 onto the supports in the hull cargo hold; then, in combination with Figure 3 and Figure 4 shown, hoist the first liquid cargo tank 100 above the second liquid cargo tank 200, make the multiple first protrusions 10 correspond to the multiple second protrusions 20 one by one, and weld and connect the two; after welding, conduct a tightness test on the weld.
[0060] Compared with the welding of the upper and lower half hold closing seams in the prior art, in this embodiment, only by connecting the multiple first protrusions 10 and the multiple second protrusions 20 by welding can the connection between the first liquid cargo tank 100 and the second liquid cargo tank 200 be realized. The length of the weld is greatly reduced, and the welding workload is significantly reduced; in addition, in the prior art, the welding position of the upper and lower half hold closing seams is on the outer shell plate of the liquid tank. When welding, it is necessary to set up a scaffold outside, which is not only dangerous but also costly. However, in this embodiment, the top surface of the second liquid cargo tank 200 and the second tabletop 21 can be used as a construction platform, eliminating the need to set up a scaffold and increasing the construction safety.
[0061] S4: Install laminated wood between the first support member and the second support member.
[0062] As Figure 4As shown in the figure, a laminated wood 70 is installed between the first support member and the second support member, which can effectively transfer the lateral load and can also bear the vertical load, playing a certain limiting role in the relative movement of the first liquid cargo tank 100 and the second liquid cargo tank 200.
[0063] As an example, the laminated wood 70 has two opposite sides. One side is fixedly connected to the second panel 62 through an adhesive 80. Additionally, by adjusting the thickness of the adhesive 80, there is a gap between the other side of the laminated wood 70 and the first panel 61. The size of this gap is designed according to the theoretical calculated value of the deformation of the first liquid cargo tank 100 and the second liquid cargo tank 200 to ensure that the laminated wood 70 is in contact with the first panel 61 when loading goods, thereby reducing the action of additional loads. In this embodiment, the adhesive 80 is selected as epoxy resin.
[0064] Embodiment Two
[0065] This embodiment provides a combined independent liquid cargo tank, which combines Figure 3 and Figure 4 As shown in the figure, it includes a first liquid cargo tank 100 and a second liquid cargo tank 200. The bottom surface of the first liquid cargo tank 100 has a plurality of first protrusions 10 arranged in an array, and the top surface of the second liquid cargo tank 200 has a plurality of second protrusions 20 arranged in an array. The plurality of first protrusions 10 are connected to the plurality of second protrusions 20 in a one-to-one correspondence, thereby realizing the connection between the first liquid cargo tank 100 and the second liquid cargo tank 200.
[0066] As an example, the combined independent liquid cargo tank provided in this embodiment is formed by the installation method of the combined independent liquid cargo tank provided in Embodiment One. Its specific structure can refer to the description of Embodiment One and will not be elaborated here.
[0067] The above embodiments only illustrate the principles and effects of the present invention by way of example, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.
Claims
1. An installation method of a combined independent liquid cargo tank, characterized in that It includes the following steps: Provide a first liquid cargo tank, the bottom surface of the first liquid cargo tank has a plurality of first protrusions arranged in an array, and first support members are symmetrically arranged outside the first protrusions; Provide a second liquid cargo tank, the top surface of the second liquid cargo tank has a plurality of second protrusions arranged in an array, the second protrusions have an arc-shaped structure, and second support members are symmetrically arranged outside the second protrusions; Place the first liquid cargo tank above the second liquid cargo tank, so that the plurality of first protrusions correspond to the plurality of second protrusions one by one, and weld the first protrusions and the second protrusions; Install laminated wood between the first support member and the second support member.
2. The installation method of the modular independent liquid cargo tank according to claim 1, characterized in that, A first table surface is arranged inside the first protrusion, and the first table surface is perpendicular to the first protrusion; a second table surface is arranged inside the second protrusion, and the second table surface is parallel to the first table surface.
3. The installation method of the modular independent liquid cargo tank according to claim 2, characterized in that, First through holes are arranged on both the first table surface and the second table surface for allowing liquid cargo to flow from the first liquid cargo tank into the second liquid cargo tank.
4. The installation method of the modular independent liquid cargo tank according to claim 1, characterized in that The first support member includes a transition plate and a first gusset plate, the transition plate is located between the first gusset plate and the first protrusion, and the transition plate and the first gusset plate are in the same plane.
5. The installation method of the modular independent liquid cargo tank according to claim 4, characterized in that, The first support member further includes a first panel, which is located between the transition plate and the first gusset plate and is perpendicular to the transition plate and the first gusset plate.
6. The installation method of the modular independent liquid cargo tank according to claim 5, characterized in that, The second support member includes a second gusset plate and a second panel, the second gusset plate is located between the second protrusion and the second panel, and the second gusset plate is perpendicular to the second panel.
7. The installation method of the modular independent liquid cargo tank according to claim 6, characterized in that, The laminated wood has two opposite side edges, one of the side edges has a gap with the first panel, and the other side edge is fixedly connected to the second panel through an adhesive.
8. The installation method of the modular independent liquid cargo tank according to claim 2, characterized in that, A third gusset plate is arranged on the upper surface of the first table surface, and the third gusset plate is perpendicular to the first table surface.
9. The installation method of the modular independent liquid cargo tank according to claim 8, characterized in that, A fourth gusset plate is arranged on the upper surface of the second table surface, and a fifth gusset plate is arranged on the lower surface of the second table surface, and the third gusset plate, the fourth gusset plate and the fifth gusset plate are in the same plane.
10. A combined independent liquid cargo tank, characterized in that, Formed by the installation method of the combined independent liquid cargo tank according to any one of claims 1 to 9.