Hot corner protection device of LNG (Liquefied Natural Gas) storage tank

Abstract

The utility model relates to the technical field of LNG (Liquefied Natural Gas) storage tanks, and discloses a hot corner protection device of an LNG storage tank, the LNG storage tank comprises an inner tank and an outer tank, and an annular accommodating space is arranged between the inner tank and the outer tank; the hot corner protection device is mounted in the accommodating space; the hot corner protection device comprises a first mounting seat, a second mounting seat and a wall plate; the first mounting seat and the second mounting seat are mounted at the top end and the bottom end of the accommodating space respectively; the number of the wall plates is multiple, the multiple wall plates are arranged in the circumferential direction of the containing space, and any two adjacent wall plates are tightly and fixedly connected. The wall plate is vertically arranged, and the two ends of the wall plate are connected with the first mounting base and the second mounting base correspondingly. According to the structure, complex typesetting design is omitted, the installation and design process is simplified, and the assembly difficulty is reduced. And the hot corner protection wall consists of a plurality of equal-width wall plates, so that the plate interchangeability is good, and the plate utilization rate is improved.

Description

Technical Field

[0001] This utility model relates to the field of LNG storage tank technology, and specifically to a thermal protection device for LNG storage tanks. Background Technology

[0002] The hot corner protection system of a full-containment cryogenic storage tank is a crucial component for preventing leakage from a damaged inner tank. It prevents the leaked cryogenic liquid from damaging the outer tank should the inner tank be damaged. It is installed between the inner and outer tanks, separated by an insulating material, which is a ring-shaped foam glass brick. In existing technology, the hot corner protection panels are placed horizontally, with multiple layers stacked vertically. Panels within the same layer are typically arranged circumferentially. Both circumferential and longitudinal welding are required between adjacent panels to secure them together. The distance between the hot corner protection panel and the inner tank is only about 800mm, a relatively narrow space, which presents challenges in installation and design complexity when performing flat welding. Utility Model Content

[0003] In view of this, the present invention provides a hot corner protection device for LNG storage tanks to solve the problem of horizontal placement of hot corner protection wall panels, stacking multiple layers of hot corner protection wall panels in the height direction, and the hot corner protection wall panels in the same layer are usually arranged in a ring. The wall panels need to be welded in both the ring and the longitudinal direction to fix the two adjacent wall panels together. The distance between the hot corner protection wall panels and the inner tank is only about 800mm, which is a relatively narrow space. When performing flat welding, there will be problems such as high installation difficulty and complex design.

[0004] In the first aspect, this utility model provides a thermal corner protection device for an LNG storage tank, wherein the LNG storage tank includes an inner tank and an outer tank, and an annular accommodating space is provided between the inner tank and the outer tank;

[0005] The thermal angle protection device is installed within the accommodating space;

[0006] The hot-angle protection device includes:

[0007] A first mounting base and a second mounting base are respectively mounted on the top and bottom ends of the accommodating space;

[0008] The wall panel is provided in a plurality of pieces, and the plurality of wall panels are arranged along the circumference of the accommodating space, and any two adjacent wall panels are tightly fixedly connected.

[0009] The wall panel is vertically arranged, and its two ends are connected to the first mounting base and the second mounting base, respectively.

[0010] Beneficial Effects: The novel hot corner protection panel structure adopts a vertical connection method, meaning the long side of the panel is vertical and the wide side is horizontal. The width of each panel is evenly distributed according to the perimeter of the hot corner protection area. The upper end of the panel is fixed to the first mounting base, and the lower end is fixed to the second mounting base, forming a structure similar to a hanging curtain. Compared with existing technologies, this eliminates the need for complex layout design. During construction, workers do not need to consider the assembly and positioning issues between the upper and lower panels. When fixing two adjacent panels, only the vertical gap needs to be fixed, simplifying the installation and design process and reducing assembly difficulty. Furthermore, the hot corner protection panel is composed of multiple panels of equal width, ensuring good material interchangeability and improving material utilization.

[0011] In one alternative implementation, the wall panel is a flat panel.

[0012] In one alternative embodiment, the hot corner protection device further includes foam glass bricks.

[0013] The foamed glass bricks are stacked between the pad and the outer tank to form an insulation layer.

[0014] Beneficial effects: The wall panels in the hot corner protection wall are all flat panels, giving the entire hot corner protection wall panel a near-circular polygonal shape. The hot corner protection device also includes foam glass bricks, which are stacked between the pad and the outer tank to form an insulation layer. The outer surface of the foam glass bricks is also flat, allowing the two to be bonded together, improving the fit compared to the curved wall panels in existing technologies. Furthermore, it eliminates the rolling time for the wall panels and saves on tooling issues related to preventing the wall panels from springing back after molding, thus reducing production and installation cycles. It also reduces the processing costs of rolling the hot corner protection wall panels.

[0015] In one alternative embodiment, the second mounting base includes a plurality of arc-shaped plates arranged circumferentially along the receiving space.

[0016] The curved plate is used to support the wall panel.

[0017] In one alternative embodiment, the wall panels and the arcuate panels are arranged alternately along the circumferential direction of the receiving space such that a single arcuate panel can support two wall panels.

[0018] In one alternative embodiment, the hot corner protection device further includes a pad, one end of which is fixed to the first mounting base and / or the second mounting base;

[0019] The pad is disposed on the side of the wall panel near the outer tank.

[0020] In one alternative implementation, a pad is disposed between two adjacent wall panels.

[0021] Beneficial effect: The pad provides positioning and support for the installation of the wall panel.

[0022] In one alternative embodiment, the first mounting base, the second mounting base, the pad, and the wall panel are made of metal and are connected by welding.

[0023] In one alternative embodiment, the first mounting base, the second mounting base, the pad, and the wall panel are made of composite materials and are connected by low-temperature adhesive.

[0024] In one alternative embodiment, the composite material consists of a fiber cloth and a metal film.

[0025] Beneficial effects: The first mounting base, second mounting base, pad, and wall panel are made of composite materials, consisting of fiber cloth and a metal film. The fiber cloth has a low thermal conductivity, solving the problem of cold leakage at the bottom of the metal steel hot corner protection device. Furthermore, the composite material is not easily deformed over long-term use, making it suitable for vertical installation. Low-temperature adhesives can be used to connect the first mounting base and pad, the second mounting base and pad, the first mounting base and wall panel, the second mounting base and pad, and the pad and wall panel, thus preventing cold bridges. Using composite materials avoids the problem of plastic deformation or fatigue cracking in metals after long-term thermal cycling or mechanical stress, leading to a gradual loss of elasticity and preventing material elasticity failure due to prolonged bending. Using low-temperature adhesives also facilitates the installation and subsequent maintenance of the hot corner protection device. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of wall panel installation in the prior art;

[0028] Figure 2 This is a schematic diagram of the wall panel installation in the hot corner protection device for the LNG storage tank provided in this utility model;

[0029] Figure 3 for Figure 2 Sectional view of section AA;

[0030] Figure 4 for Figure 2 Sectional view of section BB;

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. First mounting base;

[0033] 2. Second mounting base; 21. Curved plate.

[0034] 3. Wall panels;

[0035] 4. Pad;

[0036] 5. Foam glass bricks. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0038] The thermal protection system of a full-containment cryogenic storage tank is a crucial component for preventing leaks caused by damage to the inner tank. It protects the outer tank from damage caused by leaked cryogenic liquid in the event of inner tank damage. It is installed between the inner and outer tanks, separated by insulating material, which is a ring-shaped foamed glass brick. Figure 1 As shown, in the prior art, the hot corner protection wall panels are placed horizontally, and multiple layers of hot corner protection wall panels are stacked in the height direction. The hot corner protection wall panels in the same layer are usually arranged in a ring. The wall panels need to be welded in both ring and longitudinal directions to fix the two adjacent wall panels together. This structural type will produce ring and longitudinal welds, i.e., flat welds and vertical welds. The distance between the hot corner protection wall panel and the inner tank is only about 800mm, which is relatively narrow and has problems such as difficult installation and complex design.

[0039] To solve the above technical problems, the following will be combined with... Figures 2 to 4 The following describes embodiments of the present invention.

[0040] According to an embodiment of the present invention, a thermal protection device for an LNG storage tank is provided. The LNG storage tank includes an inner tank and an outer tank, and an annular accommodating space is provided between the inner tank and the outer tank.

[0041] The hot corner protection device is installed in the accommodating space. Specifically, the hot corner protection device includes: a first mounting base 1, a second mounting base 2, a pad 4, and a wall panel 3.

[0042] like Figures 2 to 4As shown, the first mounting base 1 and the second mounting base 2 are respectively installed at the top and bottom of the receiving space. Both the first mounting base 1 and the second mounting base 2 can be fixedly installed to the inner tube or the outer tank, for example, by welding. Several wall panels 3 are provided, and the wall panels 3 are arranged along the circumference of the receiving space. Any two adjacent wall panels 3 are tightly fixedly connected to form a heat-resistant corner protection wall that is joined end to end. The wall panels 3 are vertically arranged, and both ends of the wall panels 3 are connected to the first mounting base 1 and the second mounting base 2 respectively.

[0043] Combination Figure 1 and Figure 2 The new hot corner protection panel 3 features a vertical connection design, meaning the long side of the panel 3 is vertical and the wide side is horizontal. The width of each panel 3 is evenly distributed according to the perimeter of the hot corner protection area. The upper end of the panel 3 is fixed to the first mounting base 1, and the lower end is fixed to the second mounting base 2, forming a structure similar to a hanging curtain. Compared to existing technologies, this design eliminates the need for complex layout design. During construction, workers do not need to consider the assembly and positioning issues between the upper and lower panels 3. Fixing two adjacent panels 3 only requires fixing the vertical gap, simplifying the installation and design process and reducing assembly difficulty. Furthermore, the hot corner protection panel is composed of multiple panels 3 of equal width, ensuring good material interchangeability and improving material utilization.

[0044] The wall panels 3 in the hot corner protection wall are all flat panels, making the entire hot corner protection wall appear as a near-circular polygon. The hot corner protection device also includes foam glass bricks 5, which are stacked between the pad 4 and the outer tank to form an insulation layer. The outer surface of the foam glass bricks 5 is also flat, allowing the two to be bonded together, providing a better fit compared to the curved wall panels 3 in the prior art. Furthermore, it eliminates the rolling time of the wall panels 3 and saves on tooling issues related to preventing the wall panels 3 from springing back after molding, thus reducing the production and installation cycles. It also reduces the processing cost of rolling the hot corner protection wall panels 3.

[0045] like Figure 2 As shown, the second mounting base 2 includes several arc-shaped plates 21, which are arranged circumferentially along the receiving space, end to end, to provide bottom support for the installation of the wall panel 3. Along the circumferential direction of the receiving space, the wall panel 3 and the arc-shaped plates 21 are staggered so that a single arc-shaped plate 21 can support two wall panels 3. Figure 2 As shown, the right half of the wall panel 3 located on the left and the left half of the wall panel 3 located on the right are mounted on an arc-shaped plate 21. The arc-shaped plate 21 is arc-shaped, as shown in the figure. Figure 2As shown, the upper side of the arc-shaped plate 21 is fixedly connected to the bottom of the wall panel 3, and the lower side of the arc-shaped plate 21 is installed on the bottom surface of the accommodating space. The upper and lower sides of the arc-shaped plate 21 form an arc shape. Filler is also provided between the outer surface of the arc-shaped plate 21 and the bottom surface of the accommodating space to support the arc-shaped plate. Of course, it can also be set to other shapes, as long as the bottom end of the heat corner protection wall formed by the wall panel 3 can completely overlap the second mounting base 2 formed by the arc-shaped plate 21 during installation.

[0046] In one embodiment, such as Figure 3 and Figure 4 As shown, the hot corner protection device also includes a pad 4, which is disposed on the side of the wall panel 3 near the outer tank. The pad 4 can be single-layered or double-layered. The top of a single-layered pad 4 is fixed to the first mounting base 1, or the bottom of a single-layered pad 4 is fixed to the second mounting base 2. Alternatively, two layers of pads 4 can be fixed to the first mounting base 1 and the second mounting base 2 respectively. The pads 4 are correspondingly disposed between two adjacent wall panels 3. The pads 4 provide positioning and support for the installation of the wall panels 3.

[0047] In the above embodiments, the first mounting base 1, the second mounting base 2, the pad 4, and the wall panel 3 are made of metal; the first mounting base 1 and the pad 4, the second mounting base 2 and the pad 4, the first mounting base 1 and the wall panel 3, the second mounting base 2 and the pad 4, and the pad 4 and the wall panel 3 can be connected by welding. To facilitate welding, the installation gap between the two wall panels 3 is maintained at 1-3mm; the angle of the fan-shaped cross-section formed by the welded layer is 55-65°.

[0048] Conversely, the first mounting base 1, the second mounting base 2, the pad 4, and the wall panel 3 are made of composite materials, consisting of fiber cloth and a metal film. The fiber cloth has a low thermal conductivity, solving the problem of cold leakage at the bottom of the metal steel hot corner protection. Furthermore, the composite material is not easily deformed over long-term use, making it suitable for vertical installation. Low-temperature adhesives can be used to connect the first mounting base 1 and the pad 4, the second mounting base 2 and the pad 4, the first mounting base 1 and the wall panel 3, the second mounting base 2 and the pad 4, and the pad 4 and the wall panel 3, thus preventing cold bridges. Using fiber composite materials avoids the problem of plastic deformation or fatigue cracking in metal after long-term thermal cycling or mechanical stress, leading to a gradual loss of elasticity and preventing material elasticity failure due to long-term bending. Using low-temperature adhesives also facilitates the installation and subsequent maintenance of the hot corner protection device.

[0049] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A thermal protection device for an LNG storage tank, the LNG storage tank comprising an inner tank and an outer tank, wherein an annular accommodating space is provided between the inner tank and the outer tank; Its features are, The thermal angle protection device is installed within the accommodating space; The hot-angle protection device includes: A first mounting base (1) and a second mounting base (2) are respectively mounted on the top and bottom of the accommodating space; Wall panel (3), a plurality of wall panels (3) are provided, and a plurality of wall panels (3) are arranged along the circumference of the accommodating space, and any two adjacent wall panels (3) are tightly fixedly connected; The wall panel (3) is vertically arranged, and its two ends are connected to the first mounting base (1) and the second mounting base (2) respectively.

2. The thermal protection device for LNG storage tanks according to claim 1, characterized in that, The wall panel (3) is a flat panel.

3. The thermal protection device for LNG storage tanks according to claim 1, characterized in that, The second mounting base (2) includes a plurality of arc-shaped plates (21), which are arranged circumferentially along the accommodating space; The arc-shaped plate (21) is used to support the wall panel (3).

4. The thermal protection device for LNG storage tanks according to claim 3, characterized in that, Along the circumferential direction of the accommodating space, the wall panel (3) and the arcuate plate (21) are arranged alternately so that a single arcuate plate (21) can support two wall panels (3).

5. The thermal protection device for LNG storage tanks according to claim 3, characterized in that, The hot corner protection device also includes a pad (4), one end of which is fixed to the first mounting base (1) and / or the second mounting base (2); The pad (4) is disposed on the side of the wall panel (3) near the outer tank.

6. The thermal protection device for an LNG storage tank according to claim 5, characterized in that, The pad (4) is disposed between two adjacent wall panels (3).

7. The thermal protection device for an LNG storage tank according to claim 5, characterized in that, The thermal angle protection device also includes foam glass bricks (5). The foam glass bricks (5) are stacked between the pad (4) and the outer tank to form an insulation layer.

8. The thermal protection device for LNG storage tanks according to claim 5, characterized in that, The first mounting base (1), the second mounting base (2), the pad (4) and the wall panel (3) are made of metal and are connected by welding.

9. The thermal protection device for an LNG storage tank according to claim 5, characterized in that, The first mounting base (1), the second mounting base (2), the pad (4) and the wall panel (3) are made of composite materials and are connected by low-temperature adhesive.

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