A thin film gas holder

Abstract

The application provides a thin film gas storage tank, and relates to the field of low-temperature storage tanks. The thin film gas storage tank comprises a storage tank body, which comprises a first shielding layer, a first heat insulation layer, a second heat insulation layer and an outer shell arranged in sequence from inside to outside. The material of the first shielding layer is a stainless steel plate, a 9% nickel steel plate, an invar steel plate, an aluminum alloy plate or an aluminum foil. The first shielding layer is provided with multiple groups of corrugated patterns. Each group of corrugated patterns comprises multiple first convex corrugations and multiple second convex corrugations. The multiple first convex corrugations are distributed radially from the center to the circumferential direction. The multiple second convex corrugations are arranged one by one between the adjacent two first convex corrugations. Since the multiple first convex corrugations of the first shielding layer are distributed radially from the center to the circumferential direction, the setting can absorb temperature stress and deformation in multiple directions, allow free shrinkage or expansion in multiple directions under extreme temperature load, and greatly enhance the stress absorption capacity of the first shielding layer.

Description

Technical Field

[0001] This invention relates to the field of cryogenic storage tanks, and more particularly to a membrane gas storage tank. Background Technology

[0002] Liquefied natural gas (LNG), with its green, environmentally friendly, and efficient advantages, has long been the preferred energy source to replace oil, becoming one of the fastest-growing energy sectors globally. With my country's rapid economic development and increasingly stringent environmental regulations, the application and development of LNG are receiving growing attention. However, existing membrane gas storage tanks have poor resistance to thermal stress, making them prone to membrane failure. Summary of the Invention

[0003] This invention provides a thin-film gas storage tank to solve the problem that the existing technology has poor ability to cope with cold and heat stress.

[0004] This invention provides a thin-film gas storage tank, comprising:

[0005] The storage tank body includes a first shielding layer, a first heat insulation layer, a second heat insulation layer, and an outer shell, which are stacked sequentially from the inside to the outside. The first shielding layer is made of stainless steel plate, 9% nickel steel plate, Invar steel plate, aluminum alloy plate, or aluminum foil. The first shielding layer is provided with multiple sets of corrugated patterns, which are arranged at intervals. Each set of corrugated patterns includes multiple first raised corrugations and multiple second raised corrugations. The multiple first raised corrugations are radially distributed from the center to the circumference, and the multiple second raised corrugations are correspondingly arranged between two adjacent first raised corrugations. The length direction of the second raised corrugation forms an acute angle with the length direction of the two adjacent first raised corrugations.

[0006] A thin-film gas storage tank according to an embodiment of the present invention further includes:

[0007] A second shielding layer is disposed between the first heat insulation layer and the second heat insulation layer, and the second shielding layer is connected to the second heat insulation layer through a connector.

[0008] According to an embodiment of the present invention, a thin-film gas storage tank is provided, wherein the second shielding layer is provided with multiple sets of the aforementioned corrugated patterns.

[0009] According to an embodiment of the present invention, a thin-film gas storage tank is provided, wherein the second shielding layer comprises two layers of glass cloth and a reinforcing plate sandwiched between the two layers of glass cloth.

[0010] According to an embodiment of the present invention, a thin-film gas storage tank is provided, wherein the outer shell is made of cement.

[0011] According to an embodiment of the present invention, a thin-film gas storage tank is provided, wherein the corrugated pattern includes four first raised corrugations and four second raised corrugations, the included angle between the length directions of two adjacent first raised corrugations is 90°, and the included angle between the length direction of the second raised corrugation and the length direction of two adjacent first raised corrugations is 45°.

[0012] According to an embodiment of the present invention, a thin-film gas storage tank is provided, wherein the thickness of the second heat insulation layer is greater than the thickness of the first heat insulation layer.

[0013] According to an embodiment of the present invention, a thin-film gas storage tank is provided in which the length of the connecting member is less than or equal to the thickness of the second heat insulation layer.

[0014] According to an embodiment of the present invention, a thin-film gas storage tank is provided, wherein a connecting layer is provided between the first shielding layer and the first heat insulation layer, and an anchoring strip is provided on the side of the connecting layer facing the first shielding layer, and the first shielding layer is welded to the anchoring strip.

[0015] According to an embodiment of the present invention, a thin-film gas storage tank is provided, wherein the first shielding layer includes a plurality of first shielding plates, two adjacent first shielding plates are welded together, and the plurality of first shielding plates cooperate to form the first shielding layer.

[0016] The thin-film gas storage tank provided in this embodiment of the invention has multiple first raised corrugations in the first shielding layer that are radially distributed from the center to the circumference. This arrangement can absorb temperature stress and deformation in multiple directions, allowing free contraction or expansion in multiple directions under extreme temperature loads, which greatly enhances the stress absorption capacity of the first shielding layer. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional structural diagram of the storage tank body provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram showing the arrangement of the first and second raised corrugations provided in an embodiment of the present invention.

[0020] Figure label:

[0021] 10. First shielding layer; 20. First heat insulation layer; 30. Second heat insulation layer; 40. Outer shell; 50. Second shielding layer; 60. Connector; 70. First raised corrugation; 80. Second raised corrugation. Detailed Implementation

[0022] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," 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 the embodiments of the present invention and simplifying the description, 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 the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0025] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0027] Figure 1 A cross-sectional structural diagram of the storage tank body provided in an embodiment of the present invention is illustrated, such as... Figure 1 As shown, the membrane gas storage tank includes a tank body, which includes a first shielding layer 10, a first heat insulation layer 20, a second heat insulation layer 30, and an outer shell 40 stacked sequentially from the inside to the outside. The first shielding layer 10 is made of stainless steel plate. The stainless steel first shielding layer 10 has good corrosion resistance and good ductility, making it suitable as a shielding layer that comes into direct contact with liquefied natural gas. Of course, the shielding layer can also be made of 9% nickel steel plate, Invar steel plate, aluminum alloy plate, aluminum foil, or other materials.

[0028] It should be noted that the storage tank is not only used to store liquefied natural gas, but can also be used to store other high-pressure cryogenic gases.

[0029] The first shielding layer 10 is provided with multiple sets of corrugated patterns, which are arranged at intervals. The distance between two adjacent sets of corrugated patterns can be equal or unequal. Each set of corrugated patterns includes multiple first raised corrugations 70 and multiple second raised corrugations 80. The multiple first raised corrugations 70 are radially distributed from the center to the circumference. Arranging the multiple first raised corrugations 70 radially can cope with stress in different directions. The more first raised corrugations in each set of corrugated patterns, the more stress directions it can cope with, which can effectively prevent the first shielding layer 10 from deforming due to stress.

[0030] Multiple second raised corrugations 80 are correspondingly disposed between two adjacent first raised corrugations 70, with the length direction of the second raised corrugation 80 forming an acute angle with the length direction of the two adjacent first raised corrugations 70. Since the first raised corrugations 70 bear stress in different directions in the radial direction, their stress absorption capacity in the circumferential direction is relatively weak. By setting the second raised corrugations 80, since the length direction of the second raised corrugation 80 forms an acute angle with the length direction of the two adjacent first raised corrugations 70, the second raised corrugation 80 can absorb stress in the circumferential direction. Therefore, the second raised corrugation 80, in conjunction with the first raised corrugations 70, can absorb stress from all directions, further enhancing the first shielding layer 10's ability to withstand stress from all directions.

[0031] The thin-film gas storage tank provided in this embodiment of the invention has multiple first raised corrugations 70 arranged radially from the center to the circumference in the first shielding layer 10. This arrangement can absorb temperature stress and deformation in multiple directions, allowing free contraction or expansion in multiple directions under extreme temperature loads, which greatly enhances the stress absorption capacity of the first shielding layer 10.

[0032] In one embodiment of the present invention, the membrane gas storage tank further includes a second shielding layer 50, which is disposed between the first heat insulation layer 20 and the second heat insulation layer 30. The second shielding layer 50 serves a sealing function, enabling a double-layer seal with the first shielding layer 10, further enhancing the sealing performance of the membrane gas storage tank. Even if a leak occurs at a point in the first shielding layer 10, the second shielding layer 50 can still provide a seal, preventing liquefied natural gas leakage and improving the safety of the membrane gas storage tank. Simultaneously, since the first shielding layer 10 is thin and has weak structural strength, the second shielding layer 50 strengthens the first shielding layer 10, enhancing the structural strength of the membrane gas storage tank and preventing deformation of the first shielding layer 10. The thickness of the second shielding layer 50 can be the same as or different from the thickness of the first shielding layer 10, depending on actual needs. The second shielding layer 50 is connected to the second heat insulation layer 30 via connectors 60, with multiple connectors 60 arranged in an array. The distance between two adjacent connectors 60 is determined according to actual needs.

[0033] In a preferred embodiment of the present invention, the connector 60 is a screw, the screw shank is inserted into the second heat insulation layer 30, and the screw nut abuts against the side of the second shielding layer 50 away from the second heat insulation layer 30, thereby fixing the second shielding layer 50. Of course, the specific type of connector 60 is not limited to this, and the connector 60 can also be a nail, bolt or other connector.

[0034] In a preferred embodiment of the present invention, the thickness of the second insulation layer 30 is greater than the thickness of the first insulation layer 20, and the length of the connector 60 is less than or equal to the thickness of the second insulation layer 30, to prevent the connector 60 from piercing the second insulation layer 30 after being inserted into it, thus affecting the thermal insulation performance of the second insulation layer 30. Both the second insulation layer 30 and the first insulation layer 20 are made of foamed glass bricks, reinforced polyurethane foam, or glass fiber.

[0035] In a preferred embodiment of the present invention, the second shielding layer 50 includes a plurality of second shielding plates (not shown). The shape of the second shielding plates can be rectangular, rhomboid, or other shapes. In this embodiment, the second shielding plates are square, and each second shielding plate has the same size. This allows the multiple second shielding plates to be interchanged arbitrarily during the welding process without considering the welding position of each second shielding plate, effectively shortening production time and improving production efficiency. During the manufacturing process of the second shielding plates, adjacent shielding plates are welded together, and the multiple shielding plates cooperate to form the second shielding layer 50. Specifically, each second shielding plate is stamped in the factory, and multiple second shielding plates are welded together using an automatic welding machine.

[0036] In a preferred embodiment of the present invention, the length of the second shielding plate is 1m-4m, and the width of the second shielding plate is 1m-4m. Preferably, both the length and width of the second shielding plate are 2m, and the width of the second shielding plate is 2m.

[0037] It should be noted that a second shielding layer is used for walls below 6m, but not for walls above 6m.

[0038] In a preferred embodiment of the present invention, the second shielding layer 50 is provided with multiple sets of corrugated patterns. By providing multiple sets of corrugated patterns on the second shielding layer 50, the ability of the second shielding layer 50 to absorb stress in different directions can also be enhanced. The structure of the corrugated patterns on the second shielding layer 50 in this embodiment is the same as the structure of the corrugated patterns in the above embodiments, and therefore will not be described in detail.

[0039] In a preferred embodiment of the present invention, the second shielding layer 50 includes two layers of glass cloth and a reinforcing plate sandwiched between the two layers of glass cloth. The thickness of the reinforcing plate is 0.2-4 mm, and the material of the reinforcing plate is stainless steel plate, 9% nickel steel plate, Invar steel plate, aluminum alloy plate, or aluminum foil.

[0040] In a preferred embodiment of the present invention, the outer shell 40 is made of cement. The cement outer shell 40 can provide effective support for the first shielding layer 10 and the second shielding layer 50, further enhancing the structural strength of the membrane gas storage tank and preventing the first shielding layer 10 and the second shielding layer 50 from deforming under huge pressure. At the same time, the cement outer shell 40 also improves the performance of the membrane gas storage tank to a certain extent.

[0041] In a preferred embodiment of the present invention, the first shielding layer 10 includes a plurality of first shielding plates (not shown). The shape of the first shielding plates can be rectangular, rhomboid, or other shapes. In this embodiment, the first shielding plates are square, and each first shielding plate has the same size. During the manufacturing process of the first shielding layer 10, adjacent shielding plates are welded together, and the plurality of shielding plates cooperate to form the first shielding layer 10. Specifically, each first shielding plate is stamped in the factory, and the plurality of first shielding plates are welded together using an automatic welding machine.

[0042] In a preferred embodiment of the present invention, the length of the first shielding plate is 1m-4m, the width of the first shielding plate is 1m-4m, and the thickness of the first shielding plate is 0.2-4.0mm. Preferably, the length and width of the first shielding plate are both 2m, and the thickness of the first shielding plate is 2.5mm.

[0043] In a preferred embodiment of the present invention Figure 2 A schematic diagram illustrating the arrangement relationship between the first and second raised corrugations provided in an embodiment of the present invention is shown, as follows: Figure 2 As shown, the corrugated pattern includes four first raised corrugations 70 and four second raised corrugations 80. The angle between the length directions of two adjacent first raised corrugations 70 is 90°, and the angle between the length direction of the second raised corrugation 80 and the length directions of two adjacent first raised corrugations 70 is 45°. The length of the first raised corrugation 70 is greater than the length of the second raised corrugation 80, and the width of the first raised corrugation 70 is greater than the width of the second raised corrugation 80. The four first raised corrugations 70 and the four second raised corrugations 80 form a "star-shaped" corrugated pattern. The "star-shaped" corrugated pattern allows for bidirectional free contraction or expansion under extreme temperature loads, but the corrugations do not intersect to form wrinkles. Therefore, the corrugated pattern can absorb a large amount of temperature stress and deformation, effectively solving the problem of the poor ability of the membrane in existing membrane gas storage tanks to cope with thermal stress.

[0044] It should be noted that the spacing and length of the "X" pattern formed by the four first raised corrugations 70 and the four second raised corrugations 80, as well as the size of the first shielding plate, can be customized according to different projects to meet the requirements of different storage projects. The number of second raised corrugations 80 between two adjacent first raised corrugations 70 is not limited to one; it can also be two or three.

[0045] It should also be noted that the size relationship between the first raised corrugation 70 and the second raised corrugation 80 is not limited to this. Alternatively, the length of the first raised corrugation 70 can be equal to the length of the second raised corrugation 80, and the width of the first raised corrugation 70 can be equal to the width of the second raised corrugation 80.

[0046] In a preferred embodiment of the present invention, such as Figure 2 As shown, the corrugated pattern includes six first raised corrugations 70 and six second raised corrugations 80. The angle between the length directions of two adjacent first raised corrugations 70 is 60°. The angle between the length direction of the second raised corrugation 80 and the length direction of two adjacent first raised corrugations 70 is also 60°. The length of the first raised corrugation 70 is equal to the length of the second raised corrugation 80, and the width of the first raised corrugation 70 is equal to the width of the second raised corrugation 80. The corrugated pattern formed by the six first raised corrugations 70 and the six second raised corrugations 80 has a stronger ability to absorb stress in multiple directions compared to the corrugated pattern described in the above embodiment.

[0047] In a preferred embodiment of the present invention, a connecting layer is provided between the first shielding layer 10 and the first heat insulation layer 20, and an anchoring strip is provided on the side of the connecting layer facing the first shielding layer 10. The first shielding layer 10 is welded to the anchoring strip. Since the first shielding layer 10 is welded to the anchoring strip, the connecting layer can be stably fixed to the first shielding layer 10, and then the first heat insulation layer 20 can be fixed to the connecting layer, effectively improving the stability of the first heat insulation layer 20.

[0048] The following is combined with Figures 1 to 2 A specific embodiment of the present invention is described, such as Figures 1 to 2 As shown, the membrane gas storage tank includes a tank body, which includes a first shielding layer 10, a connecting layer, a first heat insulation layer 20, a second shielding layer 50, a second heat insulation layer 30, and an outer shell 40; the first shielding layer 10, the first heat insulation layer 20, the second heat insulation layer 30, and the outer shell 40 are stacked sequentially from the inside to the outside.

[0049] The first shielding layer 10 is made of stainless steel plate. Stainless steel first shielding layer 10 has good corrosion resistance and good ductility, making it suitable as a shielding layer that comes into direct contact with liquefied natural gas. Of course, the shielding layer can also be made of 9% nickel steel plate, Invar steel plate, aluminum alloy plate or aluminum foil.

[0050] The first shielding layer 10 is provided with multiple sets of corrugated patterns, which are arranged at intervals. The distance between two adjacent sets of corrugated patterns is equal. Each set of corrugated patterns includes four first raised corrugations 70 and four second raised corrugations 80. The four first raised corrugations 70 are radially distributed from the center to the circumference. The four second raised corrugations 80 are correspondingly arranged between two adjacent first raised corrugations 70. The length direction of the second raised corrugation 80 forms an acute angle with the length direction of the two adjacent first raised corrugations 70.

[0051] In this embodiment, the angle between the length directions of two adjacent first raised corrugations 70 is 90°, and the angle between the length direction of the second raised corrugation 80 and the length directions of the two adjacent first raised corrugations 70 is 45°. The length of the first raised corrugation 70 is greater than the length of the second raised corrugation 80, and the width of the first raised corrugation 70 is greater than the width of the second raised corrugation 80.

[0052] The first shielding layer 10 includes multiple shielding plates, each of which is a square plate with identical dimensions. Each first shielding plate is stamped in a factory, and multiple first shielding plates are welded together using an automatic welding machine. The length and width of each first shielding plate are both 2m, and the thickness of each first shielding plate is 2.5mm.

[0053] The second shielding layer 50 is disposed between the first heat insulation layer 20 and the second heat insulation layer 30, and the second shielding layer 50 is connected to the second heat insulation layer 30 through connectors 60. Multiple connectors 60 are arranged in an array, and each connector 60 is a screw. The screw shank is inserted into the second heat insulation layer 30, and the screw nut abuts against the side of the second shielding layer 50 opposite to the second heat insulation layer 30.

[0054] The second shielding layer 50 has multiple sets of corrugated patterns. The second shielding layer 50 includes two layers of glass cloth and a reinforcing plate sandwiched between the two layers of glass cloth. The thickness of the reinforcing plate is 2mm, and the material of the reinforcing plate is stainless steel.

[0055] The thickness of the second insulation layer 30 is greater than the thickness of the first insulation layer 20, and the length of the connector 60 is less than the thickness of the second insulation layer 30. Both the second insulation layer 30 and the first insulation layer 20 are made of foamed glass bricks, and the outer shell 40 is made of cement.

[0056] A connecting layer is disposed between the first shielding layer 10 and the first heat insulation layer 20. An anchoring strip is provided on the side of the connecting layer facing the first shielding layer 10, and the first shielding layer 10 is welded to the anchoring strip.

[0057] The membrane gas storage tank provided by this invention solves the problems of existing land-based cryogenic membrane storage tank systems, such as complex pleat forms, difficulty in cryogenic stamping, high production cost of membranes and extremely limited supply, large on-site workload, large amount of cryogenic adhesive used, extremely high requirements for the flatness of the concrete inner wall, insulation layers relying entirely on adhesive bonding, poor safety performance, and huge time consumption for the docking of the main shielding membrane and the welding of the main shielding layer.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thin-film gas storage tank, characterized in that, include: The storage tank body includes a first shielding layer, a first heat insulation layer, a second heat insulation layer, and an outer shell, which are stacked sequentially from the inside to the outside. The first shielding layer is made of stainless steel plate, 9% nickel steel plate, Invar steel plate, aluminum alloy plate, or aluminum foil. The first shielding layer is provided with multiple sets of corrugated patterns, which are arranged at intervals. Each set of corrugated patterns includes six first raised corrugations and six second raised corrugations. The six first raised corrugations are radially distributed from the center to the circumference. The included angle between the length directions of two adjacent first raised corrugations is 60°. The first raised corrugations are used to absorb radial stress. Six second raised corrugations are arranged one-to-one between two adjacent first raised corrugations. The angle between the length direction of the second raised corrugation and the length direction of the two adjacent first raised corrugations is 60°. The second raised corrugations are used to absorb circumferential stress. The length of the first raised corrugation is equal to the length of the second raised corrugation, and the width of the first raised corrugation is equal to the width of the second raised corrugation.

2. The membrane gas storage tank according to claim 1, characterized in that, Also includes: The second shielding layer is disposed between the first heat insulation layer and the second heat insulation layer, and the second shielding layer is connected to the second heat insulation layer through a connector.

3. The membrane gas storage tank according to claim 2, characterized in that, The second shielding layer is provided with multiple sets of the aforementioned corrugated patterns.

4. The membrane gas storage tank according to claim 2, characterized in that, The second shielding layer includes two layers of glass cloth and a reinforcing plate sandwiched between the two layers of glass cloth.

5. The membrane gas storage tank according to claim 4, characterized in that, The outer shell is made of cement.

6. The membrane gas storage tank according to any one of claims 2 to 5, characterized in that, The thickness of the second insulation layer is greater than the thickness of the first insulation layer.

7. The membrane gas storage tank according to any one of claims 2 to 5, characterized in that, The length of the connector shown is less than or equal to the thickness of the second insulation layer.

8. The membrane gas storage tank according to any one of claims 2 to 5, characterized in that, A connecting layer is provided between the first shielding layer and the first heat insulation layer. An anchoring strip is provided on the side of the connecting layer facing the first shielding layer. The first shielding layer is welded to the anchoring strip.

9. The membrane gas storage tank according to any one of claims 1 to 5, characterized in that, The first shielding layer includes a plurality of first shielding plates, with two adjacent first shielding plates welded together, and the plurality of first shielding plates cooperate to form the first shielding layer.

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