Anti-floating support, liquid cargo tank and liquefied natural gas ship

Abstract

The utility model relates to an anti-floating support, a liquid cargo tank and a liquefied natural gas carrier. The anti-floating support is used for the liquefied natural gas ship, and the liquefied natural gas ship comprises a ship body and a liquid cargo tank arranged on one side of the ship body. The anti-floating support comprises a supporting panel, a plurality of supporting webs and a hull side anti-floating structure, the supporting panel comprises a top face and a bottom face which are opposite in the first direction, the side, in the second direction, of the supporting panel is arranged on the outer wall of the liquid cargo tank, and the supporting webs are arranged on the bottom face and connected to the outer wall of the liquid cargo tank. The multiple supporting webs are arranged at intervals in the third direction. And the ship body side anti-floating structure is arranged on the ship body and pressed on the top surface. Wherein the first direction, the second direction and the third direction intersect in pairs. The anti-floating support has good supporting strength, and the risk of deformation of the anti-floating support is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of liquid cargo maintenance systems, and in particular to an anti-floating support, a liquid cargo tank, and a liquefied natural gas carrier. Background Art

[0002] The cargo tanks on LNG carriers are primarily used for the storage of liquefied gas, such as single C-type, double C-type, and triple C-type tanks. To limit the upward movement of the cargo tanks under wave loads, ensure the structural safety of the tanks and the ship, and prevent leakage, anti-floating supports are typically installed on the tanks, located at the front and rear of the tanks.

[0003] However, the anti-floating supports in the related art are prone to deformation and are unable to withstand strong buoyancy, making it difficult to meet the support requirements of existing liquid cargo tanks. Utility Model Content

[0004] Based on this, an anti-floating support, a liquid cargo tank and a liquefied natural gas ship are provided. The anti-floating support has better supporting strength and reduces the risk of deformation.

[0005] According to one aspect of the present application, an anti-floating support is provided, which is used for a liquefied natural gas ship, wherein the liquefied natural gas ship includes a hull and a liquid cargo tank provided on one side of the hull; the anti-floating support includes:

[0006] a supporting panel comprising a top surface and a bottom surface opposite to each other along a first direction, wherein one side of the supporting panel along a second direction is provided on an outer wall of the liquid cargo tank;

[0007] a plurality of supporting webs, the supporting webs being provided on the bottom surface and connected to the outer wall of the liquid cargo tank, the plurality of supporting webs being arranged at intervals along a third direction; and

[0008] A hull side anti-floating structure is provided on the hull and is pressed against the top surface;

[0009] The first direction, the second direction and the third direction intersect with each other.

[0010] In one embodiment, the anti-floating bearing further includes at least two reinforcing ribs, wherein the reinforcing ribs are connected between two adjacent supporting webs.

[0011] In one embodiment, one side of the reinforcing rib along the second direction is connected to the liquid cargo tank.

[0012] In one embodiment, the supporting web includes a plate body and a connecting portion, wherein the connecting portion is connected between the plate body and the supporting panel, along the first direction and along the plate body pointing to the supporting panel, and the size of the connecting portion gradually increases along the third direction.

[0013] In one embodiment, the supporting web includes a plane facing one side of the supporting panel, and the plane is perpendicular to the first direction; along the second direction and close to the liquid cargo tank, the size of the supporting web along the first direction gradually increases.

[0014] In one embodiment, the supporting panel includes a main body and a joint portion, wherein the joint portion is connected between the main body and the liquid cargo tank, along the second direction and along the supporting panel pointing to the liquid cargo tank, and the size of the joint portion gradually increases along the third direction.

[0015] In one embodiment, the anti-floating support further includes a supporting component and a receiving component, wherein the receiving component is arranged on the top surface of the supporting panel, and the receiving component is recessed with a receiving groove along the first direction, and the supporting component is arranged on the receiving groove, and the supporting component abuts against the anti-floating structure on the hull side.

[0016] In one embodiment, the anti-floating support further includes a buffer layer, and the buffer layer is provided between the accommodating member and the supporting member.

[0017] According to another aspect of the present application, a liquid cargo tank is provided, comprising the anti-floating support described in any one of the above embodiments.

[0018] According to yet another aspect of the present application, a liquefied natural gas carrier is provided, comprising the liquid cargo tank described in the above embodiment.

[0019] The above-mentioned anti-floating support is connected to the anti-floating structure on the side of the hull through the support panel on the liquid cargo tank, so that the LNG ship can provide a force to the liquid cargo tank through the support surface. When transporting liquid cargo tanks on water, they are easily floated due to buoyancy. The anti-floating support of the present application can transfer part of the gravity of the LNG ship to the liquid cargo tank, resisting the buoyancy of the liquid cargo tank and playing an anti-floating role for the liquid cargo tank. At the same time, the present application provides multiple supporting webs to increase the strength of the anti-floating support, so that the anti-floating support of the present application has better support strength, improves its fatigue resistance, and reduces the risk of deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an anti-floating support in one embodiment of the present application.

[0021] Figure 2 This is a structural schematic diagram of an anti-floating support provided on a liquid cargo tank in one embodiment of the present application.

[0022] Figure 3 for Figure 2 Schematic diagram of the structure of the AA section.

[0023] Figure 4 for Figure 1 Enlarged view of point C in the middle.

[0024] Description of Figure Numbers:

[0025] 10. Anti-floating support; 11. Support panel; 111. Main body; 112. Joint; 12. Support web; 13. Reinforcement rib; 14. Support member; 15. Accommodation member;

[0026] 20. Liquid cargo tank; 21. Tank body; 22. Tank inner frame; 23. Pad;

[0027] F1, first direction; F2, second direction; F3, third direction. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0030] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0034] Liquefied Natural Gas Carriers (LNG) are ships specifically designed to transport liquefied natural gas (LNG). The core of an LNG carrier is its cargo containment system, which must safely store the liquefied natural gas at temperatures around -163 degrees Celsius, preventing leakage and minimizing evaporation.

[0035] As a liquid cargo tank, the C-type tank is mainly used for the storage of liquefied gas and is widely used in the field of ships. There are many types of C-type tanks, such as single C-type, double C-type and triple C-type tanks. Stainless steel is mostly used in related technologies. In order to reduce the weight of the tank body of the C-type tank and increase the cargo capacity of the hull, an aluminum alloy C-type tank has been developed in related technologies. The C-type tank can be installed on the hull deck or inside the hull. During the operation of the hull, the design of the C-type tank must not only consider its own loads such as temperature, internal and external pressure, gravity, but also the loads generated by the movement of the ship, such as acceleration, collision, leakage, etc. In order to limit the upward movement of the C-type tank under the action of wave loads, ensure the structural safety of the storage tank and the ship, and prevent leakage, anti-floating supports are usually installed on the tank body of the C-type tank, which are arranged on the front and rear sides of the tank body of the C-type tank.

[0036] The anti-floating supports of the C-type tanks in the related art are usually made of 9Ni steel or stainless steel to improve the support strength of the C-type tanks. However, the C-type tanks are usually made of aluminum alloy. Since aluminum alloy has a lower allowable stress than steel, and the thermal expansion coefficient of aluminum alloy is about twice that of steel, when the two-plate anti-floating supports in the related art are used to support the C-type tank made of aluminum alloy, the two-plate anti-floating supports will be subject to a greater relative bearing force, or in other words, the anti-floating supports in the related art are prone to deformation and are difficult to meet the support requirements of the aluminum alloy C-type tanks in the related art. Therefore, it is necessary to propose an anti-floating support suitable for aluminum alloy C-type tanks.

[0037] Based on this, an anti-floating support is provided, which is suitable for a C-type tank made of aluminum alloy, solving the problem that the anti-floating support in the related art cannot meet the support requirements of the existing C-type tank made of aluminum alloy and is prone to deformation.

[0038] See Figure 1 、 Figure 2 and Figure 3 As shown, Figure 1 Schematic diagram of the structure of the anti-floating support 10 in one embodiment of the present application. Figure 2 Schematic diagram of the structure of the anti-floating support 10 provided on the liquid cargo tank 20 in one embodiment of the present application. Figure 3 for Figure 2 Schematic diagram of the structure of the AA section.

[0039] The anti-floating support 10 provided in the present application is used for a liquefied natural gas ship, which includes a hull and a liquid cargo tank provided on one side of the hull.

[0040] The anti-floating support 10 provided herein includes a support panel 11, multiple support webs 12, and a hull-side anti-floating structure. The support panel 11 includes a top surface and a bottom surface that oppose each other along a first direction F1. One side of the support panel 11 along a second direction F2 is disposed on the outer wall of the cargo tank 20. The support webs 12 are disposed on the bottom surface and connected to the outer wall of the cargo tank 20. The multiple support webs 12 are spaced apart along a third direction F3. The hull-side anti-floating structure is installed on a liquefied natural gas (LNG) vessel and is pressed against the top surface to transfer the hull's gravity through the anti-floating support to the cargo tank, thereby preventing the tank from floating. The first direction F1, the second direction F2, and the third direction F3 intersect with each other.

[0041] The anti-floating support 10 of the present application is connected to the anti-floating structure on the side of the hull through the support panel 11 on the liquid cargo tank 20, so that the LNG ship can provide a force to the liquid cargo tank 20 through the support surface. When transported on the water, the liquid cargo tank 20 is easily floated due to the buoyancy. The anti-floating support 10 of the present application can transfer part of the gravity of the LNG ship to the liquid cargo tank 20, resisting the buoyancy of the liquid cargo tank 20 and playing an anti-floating role for the liquid cargo tank 20. At the same time, the present application provides multiple supporting webs 12 to increase the strength of the anti-floating support 10, so that the anti-floating support 10 of the present application has better support strength, improves its fatigue resistance, and reduces the risk of deformation.

[0042] In some embodiments, see Figure 1 As shown, the anti-floating bearing 10 further includes at least two reinforcing ribs 13, which are connected between two adjacent supporting webs 12. That is, the reinforcing ribs 13 are provided between two adjacent supporting webs 12 to strengthen the strength of the supporting webs 12, thereby improving the support strength of the supporting webs 12 on the supporting panel 11, which is conducive to reducing the bending moment of the supporting panel 11, thereby helping to improve the support strength of the anti-floating bearing 10 of the present application and reduce the risk of deformation thereof.

[0043] In some embodiments, one side of the reinforcing rib 13 along the second direction F2 is connected to the liquid cargo tank 20. It is understood that the reinforcing rib 13 is connected to two adjacent supporting webs 12 and is also connected to the liquid cargo tank 20, thereby further improving the strength of the supporting webs 12 and thereby improving the supporting strength of the anti-floating bearing 10.

[0044] In some embodiments, the support web 12 includes a body portion and a connecting portion. The connecting portion connects between the body portion and the support panel 11, extending along a first direction F1 and pointing along the body portion toward the support panel 11. The connecting portion gradually increases in size along a third direction F3. It is understood that the portion of the support web 12 connected to the support panel 11 is larger than the portion away from the support panel 11, which helps to improve the connection strength between the support web 12 and the support panel 11, improve the strength of the support web 12 supporting the support panel 11, improve the fatigue resistance of the support web 12, reduce the bending moment of the support panel 11, improve the yield resistance of the support panel 11, and further improve the support strength of the anti-floating bearing 10.

[0045] In some embodiments, continue to refer to Figure 1 As shown, the supporting web 12 includes a flat surface facing the supporting panel 11, which is perpendicular to the first direction F1. Simultaneously, along the second direction F2 and as it approaches the cargo tank 20, the supporting web 12 gradually increases in size along the first direction F1. In other words, the supporting web 12 has a right-angled trapezoidal structure, with one end of the right-angled structure close to the supporting panel 11 and one end of the trapezoidal structure away from the supporting panel 11. This reduces the mass of the supporting web 12 while increasing the connection area between the supporting web 12 and the cargo tank 20, thereby increasing the supporting strength of the supporting web 12 and, consequently, further enhancing the supporting strength of the anti-floating bearing 10.

[0046] See Figure 1 , combined with reference Figure 4 As shown, Figure 4 for Figure 1 Enlarged view of point C in the middle. The support panel 11 includes a main portion 111 and a joint portion 112. The joint portion 112 connects the main portion 111 and the cargo tank 20, extending along the second direction F2 and pointing along the support panel 11 toward the cargo tank 20. The joint portion 112 gradually increases in size along the third direction F3. In other words, the support panel 11 has rounded corners near the cargo tank 20, thereby creating a larger connection area between the support panel 11 and the cargo tank 20. This improves the connection strength between the support panel 11 and the cargo tank 20, enhances the fatigue resistance of the support panel 11, reduces the bending moment of the support panel 11, improves the yield strength of the support panel 11, and enhances the support strength of the anti-floating bearing 10.

[0047] In some embodiments, continue to refer to Figure 1As shown, the anti-floating support 10 further includes a support member 14 and a receiving member 15. The receiving member 15 is disposed on the top surface of the support panel 11 and has a recessed receiving groove formed therein along a first direction F1. The support member 14 is disposed within the recessed receiving groove and abuts against the anti-floating structure on the hull side. By constraining the support member 14 within the recessed receiving groove, the connection strength of the support member 14 to the support panel 11 is improved, thereby increasing the service life of the anti-floating support 10.

[0048] In some embodiments, continue to refer to Figure 1 As shown, the accommodating member 15 is arranged at the center position of the top surface of the support panel 11 or near the liquid cargo tank 20. This is beneficial to reducing the moment, reducing the bending moment of the deformation of the support panel 11, and improving the anti-yield capacity of the support panel 11, and further improving the supporting strength of the support panel 11.

[0049] In some embodiments, the anti-floating support 10 further includes a buffer layer disposed between the receiving member 15 and the support member 14. It will be appreciated that the buffer layer acts as a buffer, reducing the impact on the support member 14 during force transmission, thereby protecting the support member 14, extending the service life of the anti-floating support 10, and improving the pressure-bearing performance of the anti-floating support 10. In some embodiments, the buffer layer is made of epoxy glue. Thus, while providing a buffering effect, the buffer layer can also bond the support member 14 to the receiving groove.

[0050] In some embodiments, the support panel 11 of the anti-floating bearing 10 may be made of laminated wood, and the support web 12 and the reinforcement ribs 13 may be made of 9Ni steel or stainless steel to obtain better strength and better compression resistance.

[0051] Refer to Table 1 below, which compares the load-bearing capacity of the present invention's anti-floating bearing 10, which uses three supporting webs 12, with conventional bearings in the related art. This comparison is based on the same material and thickness of the supporting panel 11, using a 40mm thickness as an example. It can be seen that the present invention's load-bearing capacity is more than three times that of the conventional counterpart, demonstrating superior load-bearing performance.

[0052] Table 1

[0053]

[0054] With reference to Table 2, Table 2 shows a comparison of the number of anti-floating supports 10 and common supports required for liquid cargo tanks 20 made of aluminum alloy at different volumes.

[0055] Table 2

[0056]

[0057] It can be seen that the anti-floating support 10 of the present application is more economical. Under the same volume, fewer pieces are required, which is conducive to cost saving.

[0058] According to another aspect of the present application, a liquid cargo tank 20 is provided. Figure 1 、 Figure 2 and Figure 3 As shown, the liquid cargo tank 20 includes the anti-floating support 10 in any of the above-mentioned embodiments, and a tank body 21, and the anti-floating support 10 is arranged on the tank body 21. The liquid cargo tank 20 also includes a tank inner strong frame 22 and a pad 23. The tank inner strong frame 22 is arranged inside the tank body 21 to support the tank body 21 and improve the strength of the tank body 21. The pad 23 is arranged on the outer surface of the tank body 21. The anti-floating support 10 of the present application is usually arranged on the pad 23 and is indirectly arranged on the tank body 21 through the pad 23. It can be understood that the contact area between the pad 23 and the tank body 21 is significantly increased compared to the smaller contact area between the anti-floating support 10 and the tank body 21, so that the tank body 21 and the pad 23 have a uniform connection. For example, when the pad 23 and the tank body 21 are connected by welding, and when the anti-floating support 10 and the tank body 21 are connected by welding, it is obvious that there can be welding points with uniform force between the pad 23 and the tank body 21, which is beneficial to reduce damage to the tank body 21.

[0059] According to another aspect of the present application, a liquefied natural gas ship is provided, comprising the above-mentioned liquid cargo tank 20 and a hull, wherein the tank body 21 of the liquid cargo tank 20 is arranged on one side of the hull through an anti-floating support 10, and the hull provides a force to resist buoyancy to the tank body 21 via the anti-floating support 10, thereby playing an anti-floating role for the tank body 21.

[0060] The anti-floating support 10 of the present application is connected to the anti-floating structure on the side of the hull through the support panel on the liquid cargo tank 20, so that the LNG ship can provide a force to the liquid cargo tank 20 through the support surface. When transported on water, the liquid cargo tank 20 is easily floated due to the buoyancy. The anti-floating support 10 of the present application can transfer part of the gravity of the LNG ship to the liquid cargo tank 20, resisting the buoyancy of the liquid cargo tank 20 and playing an anti-floating role for the liquid cargo tank 20. At the same time, the present application provides multiple supporting webs 12 to increase the strength of the anti-floating support 10, so that the anti-floating support 10 of the present application has better support strength, improves its fatigue resistance, and reduces the risk of deformation.

[0061] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An anti-floating support, characterized in that: The anti-floating support is used for a liquefied natural gas ship, which includes a hull and a liquid cargo tank provided on one side of the hull; the anti-floating support includes: a supporting panel comprising a top surface and a bottom surface opposite to each other along a first direction, wherein one side of the supporting panel along a second direction is provided on an outer wall of the liquid cargo tank; a plurality of supporting webs, the supporting webs being provided on the bottom surface and connected to the outer wall of the liquid cargo tank, the plurality of supporting webs being arranged at intervals along a third direction; and A hull side anti-floating structure is provided on the hull and is pressed against the top surface; The first direction, the second direction and the third direction intersect with each other.

2. The anti-floating support according to claim 1, characterized in that: The anti-floating bearing further includes at least two reinforcing ribs, and the reinforcing ribs are connected between two adjacent supporting webs.

3. The anti-floating support according to claim 2, characterized in that: One side of the reinforcing rib along the second direction is connected to the liquid cargo tank.

4. The anti-floating support according to claim 1, characterized in that: The supporting web includes a plate body and a connecting portion, wherein the connecting portion is connected between the plate body and the supporting panel, along the first direction and along the plate body toward the supporting panel, and the size of the connecting portion gradually increases along the third direction.

5. The anti-floating support according to claim 1, characterized in that: The supporting web includes a plane facing one side of the supporting panel, and the plane is perpendicular to the first direction; along the second direction and close to the liquid cargo tank, the size of the supporting web along the first direction gradually increases.

6. The anti-floating support according to claim 1, characterized in that: The supporting panel includes a main body and a joint portion, wherein the joint portion is connected between the main body and the liquid cargo tank, along the second direction and along the supporting panel toward the liquid cargo tank, and a size of the joint portion gradually increases along the third direction.

7. The anti-floating support according to claim 1, characterized in that: The anti-floating support also includes a supporting component and a receiving component. The receiving component is arranged on the top surface of the supporting panel, and the receiving component is recessed with a receiving groove along the first direction. The supporting component is arranged on the receiving groove, and the supporting component abuts against the anti-floating structure on the hull side.

8. The anti-floating support according to claim 7, characterized in that: The anti-floating support further includes a buffer layer, which is provided between the accommodating member and the supporting member.

9. A liquid cargo tank, characterized in that: It comprises the anti-floating support according to any one of claims 1 to 8, and a tank body, wherein the anti-floating support is arranged on the tank body.

10. A liquefied natural gas carrier, characterized in that: Comprising a liquid cargo tank as claimed in claim 9.

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