LNG fuel tank dome base structure

Abstract

The utility model discloses a LNG fuel cabin dome base structure, including roof, the roof is rectangular ring structure, is fixedly installed with square free edge reinforcement below the inner ring of roof, the roof below fixedly set up has the cylinder bidirectional L angle steel, on the section in the direction perpendicular to the roof horizontal plane, the cylinder bidirectional L angle steel includes first vertical board, first vertical board lower end is fixedly connected with first horizontal board one side close to square free edge reinforcement, the below fixedly connected with second vertical board one end of first horizontal board, the lower end of second vertical board is fixedly connected with second horizontal board one side away from square free edge reinforcement, the roof with square free edge reinforcement top together has the main layer U type steel, the lower end of cylinder bidirectional L angle steel is connected with the secondary layer U type steel, the below of roof still is fixedly set up and has the dome base cylinder, the utility model discloses, have efficient and convenient to install's characteristics.

Description

Technical Field

[0001] This utility model relates to the field of LNG fuel tank technology, specifically to an LNG fuel tank dome base structure. Background Technology

[0002] The dome base structure of the LNG fuel tank is a crucial component supporting and securing the dome. Its primary function is to support the dome structure, ensuring its stable installation atop the fuel tank and effectively resisting external forces and internal liquid pressure, preventing structural deformation or damage. Simultaneously, a sealing structure, such as gaskets or O-rings, is employed between the base and the dome to rigorously guarantee the fuel tank's airtightness and prevent fuel leakage. Furthermore, the base is equipped with various pipes and channels connecting to interfaces on the dome, including liquefied natural gas inlet and outlet pipes, gaseous natural gas outlet pipes, and personnel and material access channels, ensuring the normal operation and convenient maintenance of the fuel tank.

[0003] Existing dome base structures are complex, containing multiple components and connection points, which increases manufacturing difficulty and cost. Furthermore, existing dome base structures make it difficult to effectively lay insulation materials, thus affecting insulation performance. Therefore, this paper proposes a simpler LNG fuel tank dome base structure that is easy to manufacture, construct, and install to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide an LNG fuel tank dome base structure to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an LNG fuel tank dome base structure, including a top plate, the top plate being a rectangular ring structure, a square free edge reinforcement fixedly installed below the inner ring of the top plate, a cylindrical bidirectional L-angle steel fixedly arranged below the top plate, and in a cross section perpendicular to the horizontal plane of the top plate, the cylindrical bidirectional L-angle steel includes a first vertical plate, a first horizontal plate fixedly connected to the lower end of the first vertical plate near the square free edge reinforcement, a second vertical plate fixedly connected to the lower end of the other end of the first horizontal plate, and a second horizontal plate fixedly connected to the lower end of the second vertical plate away from the square free edge reinforcement;

[0006] Several main-layer U-shaped steels are clamped together on the top plate and the square free-side reinforcement. Several secondary-layer U-shaped steels are clamped to the lower end of the bidirectional L-angle steel of the cylinder. A dome base cylinder is also fixedly installed below the top plate. A horizontal main deck is also fixedly installed on the dome base cylinder. The main deck is located below the outer ring of the top plate. Several base supports are also evenly arranged between the top plate and the main deck.

[0007] According to the above technical solution, rigid foam is laid between the top plate, the bidirectional L-angle steel of the cylinder and the square free edge reinforcement, hard wood is laid between the rigid foam and the bidirectional L-angle steel of the cylinder, glass wool is laid between the top plate, the dome base cylinder and the bidirectional L-angle steel of the cylinder, a secondary insulation layer is laid below the glass wool, and a main insulation layer is installed on the lower inner side of the secondary insulation layer.

[0008] According to the above technical solution, a number of reinforcing ribs are uniformly fixed between the side of the bidirectional L-angle steel of the cylinder away from the square free edge reinforcement and the top plate, and the other side of the reinforcing ribs is fixedly connected to the dome base cylinder.

[0009] According to the above technical solution, epoxy resin mortar is laid between the filling hardwood and the bidirectional L-angle steel of the cylinder, and epoxy resin mortar is also laid between the secondary insulation layer and the dome base cylinder.

[0010] According to the above technical solution, a web plate is also fixedly installed above the top plate.

[0011] According to the above technical solution, a groove is formed on the side of the secondary insulation layer near the main deck.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are: This utility model,

[0013] (1) The cylindrical body, viewed from a cross-sectional view of the bidirectional L-angle steel, consists of a large upper "L"-shaped structure and a small lower "L"-shaped structure. The opening of the large upper "L"-shaped structure points towards the square free edge reinforcement, while the opening of the small lower "L"-shaped structure is opposite to that of the large upper "L"-shaped structure. A main layer U-shaped steel is attached to both the top plate and the square free edge reinforcement. A secondary layer U-shaped steel is attached to the lower end of the bidirectional L-angle steel of the cylindrical body. Specifically, the secondary layer U-shaped steel is attached to the lower end of the large upper "L"-shaped structure and the small lower "L"-shaped structure. By controlling the horizontal displacement of the main layer U-shaped steel and the secondary layer U-shaped steel, the dimensions of the installation positions of the rigid foam filling 9 and the hardwood filling 10 are adjusted to ensure that the rigid foam filling 9 and the hardwood filling 10 are aligned within the dome base, facilitating the laying of insulation within the fuel tank and thus simplifying construction and installation.

[0014] (2) By providing the filling rigid foam, the filling hardwood, the filling glass wool, the secondary insulation layer and the primary insulation layer, the good insulation and heat preservation performance of the dome base structure is ensured. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a partial structural schematic diagram of the present invention;

[0017] Figure 2 This is a partial cross-sectional structural schematic diagram of the present invention;

[0018] Figure 3 This is a schematic cross-sectional view of the overall structure of this utility model;

[0019] Figure 4 This is a top view of the overall structure of this utility model;

[0020] In the diagram: 1. Top plate; 2. Square free edge reinforcement; 3. Bidirectional L-angle steel for the cylinder; 31. First vertical plate; 32. First horizontal plate; 33. Second vertical plate; 34. Second horizontal plate; 35. Reinforcing rib; 4. Base support; 5. Dome base cylinder; 61. Main layer U-shaped steel; 62. Secondary layer U-shaped steel; 7. Web plate; 8. Filled with glass wool; 9. Filled with rigid foam; 10. Filled with hardwood; 11. Secondary insulation layer; 111. Groove; 12. Epoxy resin putty; 13. Main deck; 14. Main insulation layer. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 This utility model provides a technical solution: an LNG fuel tank dome base structure, including a top plate 1, which is the main load-bearing surface of the dome base. Figure 4 As shown, the top plate 1 is a rectangular ring structure. A square free edge reinforcement 2 is fixedly installed below the inner ring of the top plate 1. A cylindrical bidirectional L-angle steel 3 is fixedly installed below the top plate 1.

[0023] The top plate 1, serving as the primary load-bearing surface of the dome base, features a rectangular ring structure that not only optimizes the spatial layout but also significantly enhances the load-bearing capacity of its edges through the fixed installation of the square free-edge reinforcement 2. This design allows the dome base to maintain structural stability and prevent deformation or damage when bearing the weight of the dome above and the internal LNG fuel pressure. The square free-edge reinforcement 2 and the cylindrical bidirectional L-angle steel 3 provide additional structural support for the dome base.

[0024] like Figures 2-3 As shown, in a cross-section perpendicular to the horizontal plane of the top plate 1, the cylindrical bidirectional L-angle steel 3 includes a first vertical plate 31. A first horizontal plate 32 is fixedly connected to the lower end of the first vertical plate 31 near the square free edge reinforcement 2. A second vertical plate 33 is fixedly connected to the lower end of the other end of the first horizontal plate 32. A second horizontal plate 34 is fixedly connected to the lower end of the second vertical plate 33 away from the square free edge reinforcement 2. Several main layer U-shaped steels 61 are jointly engaged on the top plate 1 and the square free edge reinforcement 2. Several secondary layer U-shaped steels 62 are engaged at the lower end of the cylindrical bidirectional L-angle steel 3. Specifically, the secondary layer U-shaped steels 62 are engaged at the lower end of the upper large "L" shaped structure and the lower small "L" shaped structure.

[0025] The main U-shaped steel 61 and the secondary U-shaped steel 62 are snapped together, and their positions in the horizontal direction at the lower end 3 of the square free side reinforcement 2 and the cylindrical bidirectional L-angle steel can be adjusted to facilitate precise alignment and tight connection of the insulation in the fuel tank.

[0026] like Figures 2-3 As shown, a dome base cylinder 5 is fixedly installed below the top plate 1, and a horizontal main deck 13 is fixedly installed on the dome base cylinder 5. The main deck 13 is located below the outer ring of the top plate 1, and several base supports 4 are evenly arranged between the top plate 1 and the main deck 13. The top plate 1, the dome base cylinder 5, and the base supports 4 are used to ensure the main strength of the dome base.

[0027] like Figure 3As shown, rigid foam 9 is laid between the top plate 1, the cylindrical bidirectional L-angle steel 3, and the square free-edge reinforcement 2. The rigid foam 9 has excellent insulation and thermal insulation properties and a certain structural strength, which helps to reduce heat transfer and provides some support. Hardwood 10 is laid between the rigid foam 9 and the cylindrical bidirectional L-angle steel 3. The hardwood 10 is used to further enhance the stability and support of the structure, and also has a certain insulation and thermal insulation effect. Glass wool 8 is laid between the top plate 1, the dome base cylinder 5, and the cylindrical bidirectional L-angle steel 3. The glass wool 8 acts as insulation to prevent heat transfer and ensure the low-temperature performance of the dome base. A secondary insulation layer 11 is laid below the glass wool 8. The secondary insulation layer 11 is used to further reduce heat transfer and improve the overall thermal insulation performance. A main insulation layer 14 is installed on the lower inner side of the secondary insulation layer 11. The main insulation layer 14 is the most critical part of the entire thermal insulation system. It needs to be able to withstand the extremely low temperature of LNG while maintaining the integrity and stability of the structure.

[0028] Because there may be errors in construction precision, while the dimensions of the laid rigid foam 9 and the hardwood 10 are fixed, the dimensions of the installation position of the rigid foam 9 and the hardwood 10 can be adjusted by adjusting the horizontal orientation of the main layer U-shaped steel 61 and the secondary layer U-shaped steel 62, ensuring that the rigid foam 9 and the hardwood 10 are installed and aligned within the dome base. This facilitates the laying of insulation materials inside the fuel tank, thereby simplifying construction and installation.

[0029] like Figure 2 As shown, a plurality of reinforcing ribs 35 are uniformly fixed between the side of the bidirectional L-angle steel 3 away from the square free edge reinforcement 2 and the top plate 1. The other side of the reinforcing ribs 35 is fixedly connected to the dome base cylinder 5. The reinforcing ribs 35 are used to provide additional support and reinforcement in key areas of the dome base structure.

[0030] like Figure 3 As shown, epoxy resin putty 12 is laid between the filler hardwood 10 and the bidirectional L-angle steel 3 of the cylinder, and epoxy resin putty 12 is also laid between the secondary insulation layer 11 and the dome base cylinder 5. The epoxy resin putty 12 acts as an adhesive and sealant, ensuring a tight bond between the layers and preventing the penetration of moisture, gas, or other harmful substances. Simultaneously, it firmly bonds different materials together to form a unified structure, thereby improving the shear and tensile strength of the structure.

[0031] like Figure 2As shown, a web plate 7 is also fixedly installed above the top plate 1. The web plate 7 is fixedly installed above the top plate 1, and its main function is to serve as a reinforcing member of the top plate 1, increasing the rigidity and load-bearing capacity of the top plate 1. The presence of the web plate 7 helps to resist the deformation of the top plate 1 caused by changes in internal pressure and temperature of the LNG fuel tank or external loads.

[0032] like Figure 3 As shown, a groove 111 is provided on the side of the secondary insulating layer 11 near the main deck 13. The groove 111 is used to avoid interference between the secondary insulating layer 11 and the main deck 13 and to ensure the insulation effect.

[0033] Working principle: The main layer U-shaped steel 61 is clamped onto the top plate 1 and the square free edge reinforcement 2, and the secondary layer U-shaped steel 62 is clamped onto the lower end of the bidirectional L-angle steel 3 of the cylinder. By adjusting the horizontal positions of the main layer U-shaped steel 61 and the secondary layer U-shaped steel 62, the precision control of the dome can be adjusted, facilitating the laying of insulation within the fuel tank. The use of multiple insulating materials, including rigid foam 9, hardwood 10, glass wool 8, secondary insulation layer 11, and main insulation layer 14, effectively ensures the good insulation and heat preservation performance of the dome base structure.

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An LNG fuel tank dome base structure, comprising a top plate (1), characterized in that: The top plate (1) is a rectangular ring structure. A square free edge reinforcement (2) is fixedly installed below the inner ring of the top plate (1). A cylindrical bidirectional L-angle steel (3) is fixedly installed below the top plate (1). On a cross section perpendicular to the horizontal plane of the top plate (1), the cylindrical bidirectional L-angle steel (3) includes a first vertical plate (31). A first horizontal plate (32) is fixedly connected to the lower end of the first vertical plate (31) near the square free edge reinforcement (2). A second vertical plate (33) is fixedly connected to the lower end of the first horizontal plate (32). A second horizontal plate (34) is fixedly connected to the lower end of the second vertical plate (33) away from the square free edge reinforcement (2). Several main layer U-shaped steels (61) are clamped together on the top plate (1) and the square free edge reinforcement (2). Several secondary layer U-shaped steels (62) are clamped at the lower end of the cylindrical bidirectional L-angle steel (3). A dome base cylinder (5) is also fixedly installed below the top plate (1). A horizontal main deck (13) is also fixedly installed on the dome base cylinder (5). The main deck (13) is located below the outer ring of the top plate (1). Several base supports (4) are also evenly arranged between the top plate (1) and the main deck (13).

2. The LNG fuel tank dome base structure according to claim 1, characterized in that: A rigid foam (9) is laid between the top plate (1), the cylindrical bidirectional L-angle steel (3) and the square free edge reinforcement (2). A hardwood (10) is laid between the rigid foam (9) and the cylindrical bidirectional L-angle steel (3). A glass wool (8) is laid between the top plate (1), the dome base cylinder (5) and the cylindrical bidirectional L-angle steel (3). A secondary insulation layer (11) is laid below the glass wool (8). A main insulation layer (14) is installed on the lower inner side of the secondary insulation layer (11).

3. The LNG fuel tank dome base structure according to claim 2, characterized in that: A number of reinforcing ribs (35) are uniformly fixed between the side of the cylindrical bidirectional L-angle steel (3) away from the square free side reinforcement (2) and the top plate (1), and the other side of the reinforcing ribs (35) is fixedly connected to the dome base cylinder (5).

4. The LNG fuel tank dome base structure according to claim 3, characterized in that: Epoxy resin putty (12) is laid between the filling hardwood (10) and the cylindrical bidirectional L-angle steel (3), and epoxy resin putty (12) is also laid between the secondary insulation layer (11) and the dome base cylinder (5).

5. The LNG fuel tank dome base structure according to claim 4, characterized in that: A web plate (7) is also fixedly installed above the top plate (1).

6. The LNG fuel tank dome base structure according to claim 5, characterized in that: A groove (111) is provided on the side of the secondary insulation layer (11) near the main deck (13).

Images