Fuel cabin structure and ore sand ship

Abstract

A fuel cabin structure and an ore sand ship, the fuel cabin structure comprises a fuel cabin, the fuel cabin is used for storing methanol and used as fuel of the ship, the fuel cabin is arranged in a side cabin of the ship and located at a position adjacent to a fuel oil cabin and / or a water ballast cabin in the side cabin; the isolation cabin is arranged on the outer periphery of the fuel cabin and located between the fuel cabin and other cabins of the ship. The fuel cabin is arranged in the side cabin, so that the space of the side cabin can be reused for storing methanol. Therefore, the space utilization rate of the ship can be increased, the influence of the arrangement of the fuel cabin on other equipment or cabins is avoided, and the design difficulty of the ship is reduced. Besides, due to the fact that the space of the side cabin is usually very large, the space of the fuel cabin can be increased by arranging the fuel cabin in the side cabin, more methanol can be stored in the fuel cabin, and then the endurance of the ship is improved.

Description

Technical Field

[0001] This utility model relates to the field of ship structure technology, and in particular to a fuel tank structure and an ore carrier. Background Technology

[0002] Ore carriers are enormous, and conventional marine fuels generate significant pollutants during operation. Methanol fuel can effectively reduce emissions of sulfur oxides, nitrogen oxides, and particulate matter, helping the shipping industry meet increasingly stringent environmental regulations. From the macro-trend of energy transition, methanol is a clean alternative fuel. The shipping industry is moving towards low-carbon and zero-carbon development, and methanol is a promising clean alternative energy source. Equipping ore carriers with fuel tanks is an important measure to keep pace with this energy transition trend. From an economic perspective, using methanol fuel can reduce fuel costs, and due to its "clean" properties, it causes relatively less corrosion and wear to the engine. With fuel tanks, ore carriers have more options in fuel procurement, allowing them to choose the most economical fuel solution based on market prices and supply, thereby enhancing their competitiveness in the shipping market. Equipping ore carriers with fuel tanks is an inevitable choice to adapt to environmental requirements, the energy transition trend, and the pursuit of economic benefits.

[0003] In fuel storage and transfer technology, the design and supporting facilities of fuel tanks are crucial. Methanol is a liquid fuel, but its chemical properties differ from traditional marine fuels. Fuel tanks need to have excellent sealing properties to prevent methanol leakage. Therefore, there is an urgent need for a fuel tank structure and ore carrier that can improve the sealing and safety of fuel tanks, thereby enhancing the ship's safety performance. Utility Model Content

[0004] In view of the above-mentioned problems of the prior art, this application provides a fuel tank structure and an ore carrier, which can improve the sealing and safety of the fuel tank and improve the safety performance of the ship.

[0005] To achieve the above objectives, the first aspect of this application provides a fuel tank structure, comprising: a fuel tank for storing methanol as fuel for a ship, the fuel tank being disposed in a side tank of the ship and located adjacent to a fuel oil tank and / or a ballast water tank within the side tank; and an isolation compartment disposed at the outer perimeter (i.e., the outer perimeter) of the fuel tank, located between the fuel tank and other compartments of the ship.

[0006] As described above, by placing the fuel tank within the side tanks, the space of the side tanks can be reused to store methanol. This improves the ship's space utilization, avoids the fuel tank's placement affecting other equipment or compartments, and reduces the complexity of ship design. Furthermore, since side tanks are typically very large, placing the fuel tank within them also increases the fuel tank's space, allowing it to store more methanol and thus extending the ship's range.

[0007] Since fuel tanks are typically located near the engine, placing them adjacent to the fuel tanks allows for closer proximity to the engine. This reduces the distance methanol must travel from the fuel tank to the engine, thus lowering the likelihood of leaks and other hazards during transport. This not only simplifies ship design but also enhances the ship's safety performance.

[0008] By setting up an isolation chamber around the outer perimeter of the fuel tank, the fuel tank can be isolated, preventing methanol from entering other compartments and causing pollution or danger in the event of a fuel tank leak.

[0009] As one possible implementation of the first aspect, the fuel tanks are symmetrically arranged on corresponding positions on both sides of the vessel. Therefore, by symmetrically arranging the fuel tanks on corresponding positions on both sides of the vessel, the vessel's balance performance can be improved, preventing capsizing.

[0010] As one possible implementation of the first aspect, the fuel tank is provided with a cross bracing structure that connects the left and right inner surfaces of the fuel tank.

[0011] As described above, by incorporating a cross bracing structure within the fuel tank, the left and right sides of the fuel tank can be supported by this structure. This improves the structural stability of the fuel tank.

[0012] As one possible implementation of the first aspect, a strong frame structure is provided on the side wall of the isolation chamber, which is connected to the outer surface of the side wall of the fuel tank, and the positions where the strong frame structure, the cross brace structure and the side wall of the fuel tank are connected at least partially overlap.

[0013] As described above, by ensuring that the connection points of the cross bracing structure, the strong frame structure, and the fuel tank sidewalls at least partially overlap, the force transmission between the cross bracing structure and the strong frame structure can be facilitated, thereby further improving the structural strength of the fuel tank.

[0014] As one possible implementation of the first aspect, the isolation compartment is provided with a horizontal truss, the horizontal truss being at the same height as the cross bracing structure, and the horizontal truss, the cross bracing structure, and the side wall of the fuel tank being connected at least partially to each other.

[0015] As described above, by aligning the height of the horizontal truss and the cross bracing structure within the isolation compartment, the connection points between the horizontal truss, the cross bracing structure, and the sidewall of the fuel tank at least partially overlap. This facilitates the transfer of forces between the horizontal truss and the cross bracing structure, thereby improving the structural strength of the fuel tank and the isolation compartment.

[0016] As one possible implementation of the first aspect, a transition elbow plate is provided inside the fuel tank, the transition elbow plate being located at the connection between two adjacent surfaces on the inner surface of the fuel tank, and / or at the location where the cross bracing structure is connected to the inner surface of the fuel tank.

[0017] As described above, by setting transition elbows at the connection points between adjacent surfaces on the inner surface of the fuel tank and at the connection points between the cross bracing structure and the inner surface of the fuel tank, the locations of shape changes can be strengthened, thereby reducing stress concentration, improving the structural strength of the connection points, and thus improving the structural strength of the fuel tank.

[0018] As one possible implementation of the first aspect, longitudinal ribs are provided on the inner surface of the isolation compartment, and the longitudinal ribs extend along the length of the ship.

[0019] As described above, by installing longitudinal ribs on the inner surface of the isolation compartment, the structural strength of the isolation compartment can be improved. Simultaneously, since the isolation compartment is located outside the fuel tank, installing longitudinal ribs inside the isolation compartment can also indirectly improve the structural strength of the fuel tank. Furthermore, by increasing the structural strength of the fuel tank through the installation of longitudinal ribs in the isolation compartment, the need for additional longitudinal ribs within the fuel tank itself can be eliminated, thereby reducing protrusions on the inner surface of the fuel tank and consequently reducing the complexity of painting operations on the inner surface of the fuel tank.

[0020] As one possible implementation of the first aspect, the longitudinal ribs are provided on the inner surface of the isolation chamber in multiple ways.

[0021] As described above, by setting multiple longitudinal ribs on the inner surface of the isolation compartment, the structural strength of the isolation compartment and the fuel tank can be further enhanced.

[0022] The second aspect of this application provides an ore carrier, comprising: side tanks located near both sides of the vessel, wherein the side tanks contain fuel oil tanks and ballast water tanks; and a fuel tank structure, wherein the fuel tank structure is the same as that described in any one of the first aspects of this application.

[0023] As described above, by placing the fuel tank within the side tanks, the space of the side tanks can be reused to store methanol. This improves the ship's space utilization, avoids the fuel tank's placement affecting other equipment or compartments, and reduces the complexity of ship design. Furthermore, since side tanks are typically very large, placing the fuel tank within them also increases the fuel tank's space, allowing it to store more methanol and thus extending the ship's range.

[0024] Since fuel tanks are typically located near the engine, placing them adjacent to the fuel tanks allows for closer proximity to the engine. This reduces the distance methanol must travel from the fuel tank to the engine, thus lowering the likelihood of leaks and other hazards during transport. This not only simplifies ship design but also enhances the ship's safety performance.

[0025] By installing an isolation compartment on the outside of the fuel tank, the fuel tank can be isolated, preventing methanol from entering other compartments and causing pollution or danger in the event of a fuel tank leak.

[0026] As one possible implementation of the first aspect, the fuel tanks are provided in two symmetrically arranged in the side tanks on both sides of the vessel, located near the stern of the vessel.

[0027] As a result, the space of the side compartment can be reused, so that the space inside the side compartment can be used to install fuel tanks to hold methanol, or to hold ballast water.

[0028] These and other aspects of this invention will become more readily apparent in the following description of several embodiments. Attached Figure Description

[0029] The following description, with reference to the accompanying drawings, further illustrates the various features of this utility model and the relationships between them. The drawings are exemplary; some features are not shown to scale, and some drawings may omit conventional features in the field of this application that are not essential to this application, or additional features that are not essential to this application may be shown. The combination of features shown in the drawings is not intended to limit this application. Furthermore, throughout this specification, the same reference numerals refer to the same things. Specific descriptions of the drawings are as follows:

[0030] Figure 1 This is one of the schematic diagrams showing the arrangement of the fuel tanks of the vessel in this application;

[0031] Figure 2 This is the second schematic diagram showing the arrangement of the fuel tanks on the vessel in this application;

[0032] Figure 3This is a schematic diagram showing the positional relationship between the fuel tank and other compartments in this application;

[0033] Figure 4 This is one of the partial cross-sectional views of the side compartment location;

[0034] Figure 5 This is the second partial cross-sectional view of the side compartment location;

[0035] Figure 6 A schematic diagram of the horizontal truss of the isolation compartment and the cross bracing structure between the fuel tank;

[0036] Figure 7 This is a schematic diagram of the structure of the transverse end wall in the fuel tank;

[0037] Figure 8 A schematic diagram of the main deck plan structure for the fuel tank area;

[0038] Figure 9 This is a schematic diagram of the structure at the bottom of the fuel tank.

[0039] Explanation of reference numerals in the attached figures

[0040] 100 Fuel tank; 200 Isolation compartment; 300 Side compartment; 400 Fuel oil tank; 500 Ballast water tank; 1 Deck longitudinal skeleton; 2 Main deck; 3 Outer plating; 4 Side longitudinal skeleton; 5 Horizontal girder; 7 Longitudinal skeleton; 8 Outer longitudinal bulkhead; 9 Longitudinal skeleton; 11 Longitudinal skeleton; 12 Cargo hold inner shell; 13 Cargo hold inner shell longitudinal skeleton; 14 Longitudinal skeleton; 15 Bottom plate; 17 Ballast tank top longitudinal skeleton; 18 Transverse bracing structure; 19 Strong frame structure; 20 Longitudinal skeleton connection structure; 22 Transition elbow plate; 23 Ballast tank strong frame structure; 24 Double bottom rib plate; 25 Transverse end bulkhead structure; 26 Transverse end bulkhead horizontal girder; 28 Cargo hold inner hatch transverse bracing structure; 29 Longitudinal bulkhead; 29 Engine room platform; 30 Longitudinal bulkhead. Detailed Implementation

[0041] The term "comprising" as used in the specification and claims should not be construed as limiting itself to what follows; it does not exclude other elements or steps. Therefore, it should be interpreted as specifying the presence of the mentioned feature, integral, or component, but does not exclude the presence or addition of one or more other features, integrals, or components, or groups thereof. Thus, the statement "device comprising means A and B" should not be limited to a device consisting solely of components A and B.

[0042] The terms "an embodiment" or "an embodiment" as used in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in at least one embodiment of the present invention. Therefore, the terms "in one embodiment" or "in an embodiment" appearing throughout this specification do not necessarily refer to the same embodiment, but may refer to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics can be combined in any suitable manner, as will be apparent to those skilled in the art from this disclosure.

[0043] Below, with reference to the accompanying drawings, possible embodiments of the fuel tank structure in this application will be described by way of example.

[0044] To achieve the above objectives, this application provides a fuel tank structure, including a fuel tank 100 and an isolation compartment 200. The fuel tank 100 is used to store methanol as ship fuel, and is located within a side tank 300 of the ship, adjacent to a fuel oil tank 400 and / or a ballast water tank 500 within the side tank 300. The isolation compartment 200 is located at the outer perimeter (i.e., the outer perimeter) of the fuel tank 100, between the fuel tank 100 and other compartments of the ship.

[0045] As described above, by placing the fuel tank 100 within the side tank 300, the space of the side tank 300 can be reused to store methanol. This improves the ship's space utilization, avoids the fuel tank 100's placement affecting other equipment or compartments, and reduces the ship's design complexity. Furthermore, since the side tank 300 is typically very large, placing the fuel tank 100 within it also increases its space, allowing it to store more methanol and thus improving the ship's range.

[0046] Since fuel tank 100 is typically located near the engine, placing it adjacent to fuel tank 400 allows it to be closer to the engine. This reduces the distance methanol must travel from fuel tank 100 to the engine, thus lowering the likelihood of leaks or other hazards during transport. This not only reduces the complexity of ship design but also improves the ship's safety performance.

[0047] By setting an isolation chamber 200 around the outer perimeter of the fuel tank 100, the fuel tank 100 can be isolated through the isolation chamber 200, thus preventing methanol from entering other compartments and causing pollution or danger to other compartments when the fuel tank 100 leaks.

[0048] In some embodiments, the fuel tanks 100 are symmetrically arranged on opposite sides of the vessel. Therefore, by symmetrically arranging the fuel tanks 100 on opposite sides of the vessel, the vessel's balance performance can be improved, preventing capsizing.

[0049] In some embodiments, a cross bracing structure 18 is provided within the fuel tank 100, connecting the left and right inner surfaces of the fuel tank 100. Thus, by providing the cross bracing structure 18 within the fuel tank 100, the cross bracing structure 18 can provide support for the left and right sides of the fuel tank 100. This improves the structural stability of the fuel tank 100.

[0050] In some embodiments, a strong frame structure 19 is provided on the side wall of the isolation compartment 200, which is connected to the outer surface of the side wall of the fuel tank 100. The positions where the strong frame structure 19, the cross brace structure 18, and the side wall of the fuel tank 100 are connected at least partially overlap. Therefore, by ensuring that the positions where the cross brace structure 18, the strong frame structure 19, and the side wall of the fuel tank 100 are connected at least partially overlap, the force transmission between the cross brace structure 18 and the strong frame structure 19 can be facilitated, thereby further improving the structural strength of the fuel tank 100.

[0051] In some embodiments, a horizontal truss 5 is provided within the isolation chamber 200, the horizontal truss 5 being at the same height as the cross bracing structure 18 and connected to it. Thus, by aligning the horizontal truss 5 with the cross bracing structure 18 within the isolation chamber 200, the connections between the horizontal truss 5, the cross bracing structure 18, and the sidewall of the fuel tank 100 at least partially overlap. This facilitates the transmission of forces between the horizontal truss 5 and the cross bracing structure 18, thereby improving the structural strength of the fuel tank 100 and the isolation chamber 200.

[0052] In some embodiments, a transition elbow plate 22 is provided within the fuel tank 100. The transition elbow plate 22 is located at the junction of two adjacent surfaces on the inner surface of the fuel tank 100, and / or at the junction of the cross brace structure 18 and the inner surface of the fuel tank 100. Therefore, by providing the transition elbow plate 22 at the junction of two adjacent surfaces on the inner surface of the fuel tank 100, and at the junction of the cross brace structure 18 and the inner surface of the fuel tank 100, the locations of shape changes can be reinforced, thereby reducing stress concentration, improving the structural strength of the connection points, and ultimately improving the structural strength of the fuel tank 100.

[0053] In some embodiments, longitudinal ribs 7, 9, 11, and 14 are provided on the inner surface of the isolation compartment 200, extending along the length of the ship. Therefore, by providing longitudinal ribs 7, 9, 11, and 14 on the inner surface of the isolation compartment 200, the structural strength of the isolation compartment 200 can be improved. Simultaneously, since the isolation compartment 200 is located outside the fuel tank 100, providing longitudinal ribs 7, 9, 11, and 14 within the isolation compartment 200 can also indirectly improve the structural strength of the fuel tank 100. Furthermore, by providing longitudinal ribs 7, 9, 11, and 14 in the isolation compartment 200 to improve the structural strength of the fuel tank 100, the longitudinal ribs 7, 9, 11, and 14 within the fuel tank 100 can be omitted, thereby reducing protrusions on the inner surface of the fuel tank 100 and reducing the technological difficulty of painting operations on the inner surface of the fuel tank 100.

[0054] In some embodiments, multiple longitudinal ribs 7, 9, 11, and 14 are provided on the inner surface of the isolation chamber 200. Thus, by providing multiple longitudinal ribs 7, 9, 11, and 14 on the inner surface of the isolation chamber 200, the structural strength of the isolation chamber 200 and the fuel tank 100 can be further enhanced.

[0055] The above description provides an exemplary description of possible embodiments of the fuel tank structure in this application. Below, with reference to the accompanying drawings, a detailed description of the specific structure of the ship in this application will be given in a particular embodiment.

[0056] Figure 1 This is one of the schematic diagrams showing the arrangement of the fuel tank 100 of the vessel in this application; Figure 2 This is the second schematic diagram showing the arrangement of the fuel tank 100 of the vessel in this application; Figure 3 This is a schematic diagram showing the positional relationship between the fuel tank 100 and other compartments in this application. Figures 1-3 As shown, the vessel in this embodiment is an ore carrier, typically featuring large side tanks 300 on both sides, providing ample space. Fuel tanks 100 and fuel oil tanks 400 are located within these side tanks 300, near the stern, on either side of the cargo hold. The fuel tank structure fully utilizes the ample space of the side tanks 300 to house the large-capacity steel fuel tank 100, with a capacity of 12,000 cubic meters. The remaining space in the side tanks 300 is used as ballast water tanks 500 to hold ballast water. In terms of layout, the fuel oil tank 400 is located at the rear of the side tanks 300 to minimize its distance from the engine and facilitate fuel supply. Fuel tanks 100 and 400 are adjacent. To ensure the safe storage and transportation of methanol fuel and prevent potential safety hazards caused by mutual interference between methanol and fuel, an isolation compartment 200 is installed between fuel tanks 100 and 400, serving as a buffer.

[0057] like Figures 1-3As shown, isolation compartments 200 are installed at the junctions of fuel tank 100, ballast water tank 500, cargo holds, and deck to enhance safety and prevent the risk of methanol accidentally coming into contact with ballast water or cargo. This multi-layered design fully reflects the high level of safety requirements placed on ships transporting special hazardous chemicals. These isolation measures help protect the longitudinal bulkheads of fuel tank 100 and reduce the risk of damage and leakage that may be caused by external factors.

[0058] Figure 4 This is one of the partial cross-sectional views at position 300 of the side compartment; Figure 5 This is the second partial cross-sectional view of the side compartment at position 300. Figure 6 A schematic diagram of the horizontal truss of the isolation compartment 200 and the intermediate cross bracing structure of the fuel tank 100; Figure 7 This is a structural schematic diagram of the transverse end wall of fuel tank 100; Figure 8 A schematic diagram of the main deck structure in area 100 of the fuel tank; Figure 9 This is a schematic diagram of the structure at the bottom of the fuel tank 100.

[0059] like Figure 4 , Figure 8 As shown, the outer longitudinal wall 8 of the fuel tank 100 is aligned with the longitudinal walls 29 of the fuel tank 400 in the cargo hold and the longitudinal walls 30 of the fuel tank 400 in the engine room along the ship's length. This arrangement directly contributes to the strength of the hull beams, effectively reducing bending and shear stresses and improving the hull beam capacity. The main deck 2, the outer plating 3 of the deck longitudinal skeleton 1, and the inner shell 12 of the cargo hold can be effectively reduced, lowering construction costs. Specifically, the thickness of the inner shell 12 of the cargo hold can be significantly reduced in the methanol tank area, with a reduction of approximately 5 mm.

[0060] like Figure 9 As shown, the bottom plate 15 of the fuel tank 100 is aligned with the bottom plate of the fuel tank 400 and the engine room platform 29 at the same height, which ensures the structural continuity and can directly participate in the overall longitudinal strength, thus solving the problem of bending strength of the hull beam in the stern section of the cargo hold of conventional ship types.

[0061] like Figure 5 , Figure 6As shown, the methanol tank strong frame structure 19 inside the side compartment 300 is aligned with the hatch cross bracing structure 28 inside the cargo hold, the ballast tank strong frame structure 23, and the double-layer bottom rib plate 24, ensuring sufficient lateral strength of the hull. A central cross bracing structure 18 is arranged inside the fuel tank 100, with a height consistent with the horizontal truss 5 of the isolation compartment 200, connecting the strong frame structures 19 of the fuel tank 100 inside the left and right side compartments 300, reducing the strong frame span and enhancing its stability. The fuel tank 100 adopts a longitudinal frame structure, with longitudinal ribs 7, 9, 11, and 14 arranged on one side of the isolation compartment 200. The internal structural surfaces of the fuel tank 100 have no stiffeners or other components, reducing the difficulty of the painting process. The longitudinal walls of fuel tank 100, with top and bottom longitudinals 7, 9, 11, and 14 respectively aligned with deck longitudinals 1, side longitudinals 4, cargo hold inner shell longitudinals 13, and ballast tank top longitudinals 17, are connected at strong frame locations via longitudinal connecting structures 20, mutually supporting each other to effectively improve structural strength and stability. Transition elbows (22) are also provided at the four corners of fuel tank 100 and at the intersections of the transverse bracing structure 18 and the longitudinal walls, which can strengthen areas of shape change and effectively reduce stress concentration.

[0062] like Figure 7 As shown, the transverse endwall structure 25 of the fuel tank 100 is a planar bulkhead with vertical stiffeners. The horizontal truss 26 of the transverse endwall of the fuel tank 100 is arranged at the height of the horizontal truss 5 of the isolation compartment 200 to support the vertical stiffeners.

[0063] The vessel is also equipped with a methanol delivery system, a methanol engine system, a safety monitoring system, and an automated monitoring platform. The methanol delivery system comprises a piping network and a pumping system. The piping network consists of dedicated methanol delivery pipelines, which are pressure-resistant, corrosion-resistant, and equipped with safety valves and filters to ensure the safe pumping of methanol to the engine. The pumping system uses high-precision, high-reliability methanol pumps that can precisely control the flow and pressure of methanol to meet the engine's fuel requirements under different operating conditions. A backup pump is also provided to improve system redundancy and reliability.

[0064] The methanol engine in this methanol engine system employs high-pressure common rail fuel injection technology. This allows for precise control of the methanol injection quantity and timing, ensuring complete combustion of methanol within the cylinder, improving combustion efficiency, and reducing emissions of incomplete combustion products. Since methanol combustion still produces pollutants such as nitrogen oxides, an exhaust gas treatment system is required. This invention utilizes an EGR catalytic reduction device to reduce nitrogen oxide emissions to meet the environmental requirements of the International Maritime Organization (IMO).

[0065] The safety detection system is equipped with highly sensitive leak detection sensors installed around fuel tank 100 and the delivery pipelines, enabling real-time monitoring of methanol leaks and timely alerts to the crew. It also features a comprehensive fire prevention and explosion protection system, including combustible gas detectors, ventilation equipment, an inert gas protection system, and fire extinguishing devices.

[0066] A comprehensive automated monitoring platform for the ship will be established to monitor and centrally manage in real time the fuel tank level and pressure, the methanol delivery system flow and pressure, and engine operating parameters. Crew members can use this platform to intuitively understand the operating status of each system and remotely operate and control it. For example, a replenishment reminder will be triggered when the methanol level is too low; when an engine malfunctions, the platform can quickly diagnose the cause of the fault and provide suggested solutions.

[0067] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this utility model is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of this utility model. Therefore, although this application has been described in detail through the above embodiments, this utility model is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of this utility model, all of which fall within the protection scope of this utility model.

Claims

1. A fuel tank structure, characterized in that, include: A fuel tank for storing methanol as fuel for the ship is located in a side tank of the ship, adjacent to the fuel oil tank and / or ballast water tank in the side tank. An isolation compartment is disposed at the outer perimeter of the fuel tank, located between the fuel tank and other compartments of the ship.

2. The fuel tank structure according to claim 1, characterized in that, The fuel tanks are symmetrically arranged on both sides of the ship at corresponding positions.

3. The fuel tank structure according to claim 1, characterized in that, The fuel tank is equipped with a cross bracing structure, which connects the left and right inner surfaces of the fuel tank.

4. The fuel tank structure according to claim 3, characterized in that, The isolation chamber has a strong frame structure on its side wall, which is connected to the outer surface of the side wall of the fuel tank. The positions where the strong frame structure, the cross brace structure, and the side wall of the fuel tank are connected at least partially overlap.

5. The fuel tank structure according to claim 4, characterized in that, The isolation compartment is equipped with a horizontal truss, which is at the same height as the cross bracing structure. The horizontal truss, the cross bracing structure and the side wall of the fuel tank are connected at least partially overlapping.

6. The fuel tank structure according to claim 3, characterized in that, The fuel tank is provided with a transition elbow plate, which is located at the connection between two adjacent surfaces on the inner surface of the fuel tank, and / or at the connection between the cross bracing structure and the inner surface of the fuel tank.

7. The fuel tank structure according to claim 1, characterized in that, The inner surface of the isolation compartment is provided with longitudinal ribs that extend along the length of the ship.

8. The fuel tank structure according to claim 7, characterized in that, The longitudinal ribs are provided on the inner surface of the isolation chamber in multiple ways.

9. An ore carrier, characterized in that, include: Side compartments, which are located near the sides of the vessel, and contain fuel tanks and ballast water tanks; A fuel tank structure, wherein the fuel tank structure is the fuel tank structure according to any one of claims 1-8.

10. The ship according to claim 9, characterized in that, There are two fuel tanks, symmetrically arranged in the side compartments on both sides of the vessel, located near the stern of the vessel.

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