Horizontal pressure tank

Abstract

The application discloses a horizontal pressure storage tank, which comprises an inner tank and an outer cladding layer, the inner tank is made of metal material, the inner tank has a storage cavity, the outer cladding layer is wrapped on the outer side of the inner tank, and the outer cladding layer is made of super high performance concrete material. The horizontal pressure storage tank of the embodiment of the application has the complementary structure of the inner tank made of metal material and the outer cladding layer made of super high performance concrete, has good corrosion resistance, permeability resistance and crack resistance, can reduce the maintenance and coating requirements, has low operation and maintenance costs, and is more suitable for long-term use in a humid underground environment.

Description

Technical Field

[0001] This invention relates to the technical field of pressure tanks, and specifically to a horizontal pressure tank. Background Technology

[0002] Horizontal pressure tanks are suitable for petrochemical, gas storage, water conservancy projects and other fields. In related technologies, horizontal pressure tanks are made of metal materials. However, horizontal pressure tanks have poor corrosion resistance, require regular maintenance and painting, have high operating and maintenance costs, and cannot be used for a long time in underground humid environments. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention propose a horizontal pressure storage tank, in which an inner tank made of metal and an outer cladding made of ultra-high performance concrete form a complementary structure with good corrosion resistance, impermeability and crack resistance. This reduces maintenance and painting requirements, lowers operating and maintenance costs, and is more suitable for long-term use in damp underground environments.

[0005] The horizontal pressure storage tank of this invention includes an inner tank and an outer cladding layer. The inner tank is made of metal and has a storage cavity. The outer cladding layer is wrapped around the outside of the inner tank and is made of ultra-high performance concrete.

[0006] In some embodiments, the inner tank includes a cylindrical body and a first end cap and a second end cap respectively disposed at both ends of the cylindrical body, the first end cap, the second end cap and the cylindrical body together forming the storage cavity.

[0007] In some embodiments, the horizontal pressure tank further includes a reinforcing rib assembly disposed on the inner wall and / or outer wall of the cylinder.

[0008] In some embodiments, the reinforcing rib assembly includes a plurality of annular ribs extending circumferentially along the cylinder body, and the plurality of annular ribs are spaced apart axially along the cylinder body; and / or, the reinforcing rib assembly includes a plurality of longitudinal ribs extending axially along the cylinder body, and the plurality of longitudinal ribs are spaced apart circumferentially along the cylinder body; and / or, the reinforcing rib assembly includes a helical rib spirally surrounding the cylinder body axially.

[0009] In some embodiments, the ratio of the axial length L of the cylinder to the outer diameter D of the cylinder is L / D, where L / D is 1 to 10.

[0010] In some embodiments, the wall thickness of the inner tank is 12mm to 16mm.

[0011] In some embodiments, the inner tank has a reinforcing plate on its wall, and the horizontal pressure tank has a connection port that penetrates the reinforcing plate and the inner tank wall.

[0012] In some embodiments, the minimum thickness of the outer cladding layer is 500 mm to 1000 mm, and / or,

[0013] The outer cladding layer is generally rectangular in shape.

[0014] In some embodiments, at least one of the first end cap and the second end cap is a spherical end cap or an elliptical end cap.

[0015] In some embodiments, the cylinder and the end cap are connected to each other by welding; and / or, the outer cladding is formed by casting.

[0016] The horizontal pressure storage tank of this invention is suitable for storing media such as compressed air, water, crude oil, and natural gas. The inner tank is made of metal, providing good airtightness and partial corrosion resistance. Meanwhile, the outer cladding is made of ultra-high performance concrete, which has a strong load-bearing capacity, capable of withstanding an internal pressure of 6 MPa. Ultra-high performance concrete also has good corrosion resistance, giving the horizontal pressure storage tank excellent corrosion resistance, impermeability, and crack resistance. It also improves the tank's low-temperature resistance and freeze-thaw resistance, thus meeting the storage requirements of the media.

[0017] The horizontal pressure tank of this invention has a complementary structure with an inner tank made of metal and an outer cladding made of ultra-high performance concrete. Compared with horizontal pressure tanks made of metal in related technologies, it can reduce maintenance and painting requirements, has lower operating and maintenance costs, and is more suitable for long-term use in underground humid environments. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the inner tank of a horizontal pressure storage tank according to an embodiment of the present invention.

[0019] Figure 2 This is a plan view of the inner tank of a horizontal pressure storage tank according to an embodiment of the present invention.

[0020] Figure 3 This is a perspective view of a horizontal pressure tank according to an embodiment of the present invention.

[0021] Figure 4 This is a plan view of a horizontal pressure tank according to an embodiment of the present invention.

[0022] Figure 5This is a stress distribution cloud diagram of the inner tank of a horizontal pressure tank with a length-to-diameter ratio of 5, according to an embodiment of the present invention.

[0023] Figure 6 This is a stress distribution cloud map of the outer cladding layer of a horizontal pressure tank with a length-to-diameter ratio of 5, according to an embodiment of the present invention.

[0024] Figure 7 This is a cross-sectional stress distribution cloud diagram of the outer cladding layer of a horizontal pressure tank with a length-to-diameter ratio of 5, according to an embodiment of the present invention.

[0025] Figure 8 This is a stress distribution cloud map of the inner tank of a horizontal pressure tank according to an embodiment of the present invention, when the outer cladding layer thickness is 500mm.

[0026] Figure 9 This is a stress distribution cloud map of the outer cladding layer of a horizontal pressure tank according to an embodiment of the present invention, when the outer cladding layer thickness is 500 mm.

[0027] Figure label: 1. Inner tank; 11. Cylinder body; 12. First end cap; 13. Second end cap; 2. Outer layer; 3. Reinforcing rib assembly; 31. Circular rib. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] like Figures 1 to 4 As shown, the horizontal pressure storage tank of this invention includes an inner tank 1 and an outer cladding layer 2. The inner tank 1 is made of metal and has a storage cavity. The outer cladding layer 2 is wrapped around the outside of the inner tank 1 and is made of ultra-high performance concrete.

[0030] The horizontal pressure storage tank of this invention is suitable for storing media such as compressed air, water, crude oil, and natural gas. The inner tank 1 is made of metal, providing good airtightness and partial corrosion resistance. Meanwhile, the outer cladding layer 2 is made of ultra-high performance concrete, which has a strong load-bearing capacity, capable of withstanding an internal pressure of 6 MPa. Ultra-high performance concrete also has good corrosion resistance, giving the horizontal pressure storage tank good corrosion resistance, impermeability, and crack resistance. It also improves the low-temperature resistance and freeze-thaw resistance of the horizontal pressure storage tank, thus meeting the storage requirements of the media.

[0031] The horizontal pressure tank of this invention has an inner tank 1 made of metal and an outer cladding layer 2 made of ultra-high performance concrete, which form a complementary structure. Compared with horizontal pressure tanks made of metal in related technologies, it can reduce maintenance and painting requirements, has lower operating and maintenance costs, and is more suitable for long-term use in underground humid environments.

[0032] Optionally, the inner tank 1 is made of Q355 carbon steel or Q345R carbon steel.

[0033] Optionally, the outer cladding layer 2 is constructed by on-site pouring to form a complete tank structure.

[0034] Optionally, after construction is completed, a pressure test is conducted on the storage tank to verify its load-bearing capacity.

[0035] Ultra-high performance concrete (UHPC) has a compressive strength of 120 MPa to 180 MPa, a cylindrical splitting tensile strength of 15 MPa to 24 MPa, a maximum aggregate size of 0.4 mm to 0.6 mm, a porosity of 2% to 6%, a fracture energy of 10 kN•m / m to 40 kN•m / m, an elastic modulus of 37 GPa to 55 GPa, an ultimate flexural strength of 18 MPa to 35 MPa, a water absorption rate of less than 5%, and a chloride ion diffusion coefficient (steady-state diffusion) of less than 2 × 10⁻⁶. - ¹² (mm² / s), 100% freeze-thaw resistance, 0.01% surface erosion (good surface erosion resistance), and creep coefficient 0.2~1.2 Cu. Therefore, ultra-high performance concrete possesses high compressive strength and durability, as well as high tensile strength, high strength and toughness, and good wear resistance, corrosion resistance and explosion resistance.

[0036] The horizontal pressure tank of this invention utilizes the tensile, compressive, crack-resistant, and impermeable properties of the outer cladding layer 2 to withstand all internal pressure, and there is no need to install steel bars inside the outer cladding layer 2, thereby avoiding the risk of steel bar corrosion.

[0037] In some embodiments, such as Figure 1 As shown, the inner tank 1 includes a cylindrical body 11 and a first end cap 12 and a second end cap 13 respectively located at both ends of the body 11. The first end cap 12, the second end cap 13 and the body 11 together form a storage cavity.

[0038] The first end cap 12, the second end cap 13, and the cylinder 11 together form a closed inner tank 1, which has good airtightness and can meet the airtightness requirements for media storage.

[0039] In some embodiments, the cylinder 11 and the end cap are connected to each other by welding.

[0040] Optionally, the cylinder 11 and the end cap are welded using argon arc welding to ensure welding quality.

[0041] Optionally, the cylinder 11 is formed by cold rolling or hot rolling.

[0042] In some embodiments, at least one of the first end cap 12 and the second end cap 13 is a spherical end cap or an elliptical end cap.

[0043] When spherical or elliptical heads are welded to the cylinder 11, there are relatively fewer weld seams, which can improve the pressure-bearing capacity of the inner tank 1.

[0044] like Figure 1 As shown, the inner tank 1 is a horizontal cylindrical shape, the cylinder body 11 is cylindrical, the first end cap 12 and the second end cap 13 are both spherical end caps, the first end cap 12 and the second end cap 13 are respectively welded to the two ends of the cylinder body 11 to form a closed storage cavity.

[0045] In some embodiments, the horizontal pressure tank further includes a reinforcing rib assembly 3, which is disposed on the inner wall and / or outer wall of the cylinder 11.

[0046] The reinforcing rib assembly 3 is provided on the inner or outer wall of the cylinder 11, which can strengthen the inner tank 1, improve the deformation resistance of the inner tank 1, and thus improve the service life of the inner tank 1.

[0047] like Figures 1 to 3 As shown, the reinforcing rib assembly 3 is located on the outer wall of the cylinder 11, which is more conducive to the processing and manufacturing of the inner tank 1. In addition, the reinforcing rib assembly 3 is located on the outside of the inner tank 1. When the outer cladding layer 2 is poured, the reinforcing rib assembly 3 can increase the contact area between the concrete and the inner tank 1, thereby improving the connection strength between the inner tank 1 and the outer cladding layer 2 and improving the performance stability of the horizontal pressure storage tank.

[0048] In some embodiments, such as Figures 1 to 3 As shown, the reinforcing rib assembly 3 includes a plurality of annular ribs 31, which extend circumferentially along the cylinder 11 and are spaced apart axially along the cylinder 11.

[0049] By arranging multiple annular ribs 31 at intervals along the axial direction of the cylinder 11, the overall strength of the inner tank 1 can be improved.

[0050] Specifically, the annular ribs 31 are circular and encircle the cylinder 11. Multiple annular ribs 31 are evenly arranged along the axial direction of the cylinder 11, so that the inner tank 1 maintains the consistency of strength in both the circumferential and axial directions, reducing the risk of local weak points on the tank wall of the inner tank 1 leading to unstable performance.

[0051] In some embodiments, the reinforcing rib assembly 3 includes a plurality of longitudinal ribs (not shown in the figure), which extend axially along the cylinder 11 and are arranged at circumferential intervals along the cylinder 11.

[0052] Specifically, the longitudinal ribs extend in the same direction as the cylinder 11, and multiple longitudinal ribs are evenly arranged around the circumference of the cylinder 11.

[0053] In some embodiments, the reinforcing rib assembly 3 includes a spiral rib (not shown in the figure), which spirals around the cylinder 11 along its axial direction.

[0054] It is understandable that, based on the properties and pressure parameters of the material stored in the pressure tank, those skilled in the art can select one or more of the above-mentioned annular ribs 31, longitudinal ribs and spiral ribs to form a reinforcing rib assembly 3 to ensure the stability of the pressure tank.

[0055] In some embodiments, such as Figure 2 As shown, the ratio of the axial length L of the cylinder 11 to the outer diameter D of the cylinder 11 is L / D, and L / D is 1~10.

[0056] In other words, the length-to-diameter ratio of the inner tank 1 is 1 to 10. By controlling the length-to-diameter ratio of the inner tank 1, production costs can be reduced, while the probability of the inner tank 1 bending and deforming under axial load can be reduced, thus enhancing the structural stability of the inner tank 1 and thereby enhancing the stability of the horizontal pressure storage tank.

[0057] Preferably, the ratio L / D of the axial length of the cylinder 11 to the outer diameter D of the cylinder 11 is 2 to 5.

[0058] As an example, the inner tank 1 has a wall thickness of 16 mm and the outer cladding layer 2 has a thickness of 650 mm and an aspect ratio of 5. Stress analysis is performed on the inner tank 1 and the outer cladding layer 2 respectively.

[0059] like Figure 5 As shown, this is a stress distribution cloud map of inner tank 1. The color bars on the right side of the figure represent stress values ​​in Pa, with the color gradually changing from blue to red, and the corresponding stress values ​​gradually increasing from bottom to top. The colors of each area of ​​inner tank 1 in the figure correspond to the colors in the color bars on the right.

[0060] like Figure 6 As shown, this is a cloud map of the overall stress distribution of the outer cladding layer 2; Figure 7 As shown, this is a cross-sectional stress distribution cloud map of the outer cladding layer 2. The color bars on the right side of the figure represent stress values ​​in Pa, with the color gradually changing from blue to red, and the corresponding stress values ​​gradually increasing from bottom to top. The colors of each region of the outer cladding layer 2 in the figure correspond to the colors in the color bars on the right.

[0061] Similarly, stress analysis can be performed on inner tank 1 and outer cladding 2 with aspect ratios of 4, 3, and 2 respectively to obtain stress distribution cloud maps of inner tank 1 and outer cladding 2 under different aspect ratios. Then, the stress changes of inner tank 1 and outer cladding 2 under different aspect ratios can be analyzed, so that an appropriate aspect ratio can be selected for different working conditions, thereby reducing production costs while ensuring safety performance.

[0062] In some embodiments, the wall thickness of the inner tank 1 is 12mm to 16mm.

[0063] Compared with horizontal pressure tanks made of metal materials in related technologies, the inner tank 1 in this embodiment of the invention has a thinner wall thickness and can be made of thin steel plate, which can reduce manufacturing costs and processing difficulty.

[0064] In some embodiments, the inner tank 1 is provided with a reinforcing plate (not shown in the figure) on its tank wall, and the horizontal pressure tank has a connection port that penetrates the reinforcing plate and the tank wall of the inner tank 1.

[0065] The connection port is used to connect the pipe, allowing the material in the storage chamber to enter and exit through the pipe. By setting a reinforcing plate, the strength of the connection port can be increased, preventing deformation, cracking, etc. at the connection port, thereby ensuring the overall airtightness and strength of the inner tank 1.

[0066] In some embodiments, the thickness of the outer cladding layer 2 is 500 mm to 1000 mm.

[0067] By limiting the thickness of the outer cladding layer 2, the outer cladding layer 2, which is cast using ultra-high performance concrete, can withstand internal pressure. At the same time, it improves the durability, impermeability and corrosion resistance of the outer cladding layer 2, allowing the pressure tank to be placed underground for use, extending the service life of the pressure tank and reducing maintenance costs.

[0068] As an example, the horizontal pressure storage tank is 10m long and the outer cladding layer 2 is 500mm thick. Stress analysis is performed on the inner tank 1 and the outer cladding layer 2 respectively.

[0069] like Figure 8 As shown, this is a stress distribution cloud map of inner tank 1. The color bars on the right side of the figure represent stress values ​​in Pa, with the color gradually changing from blue to red, and the corresponding stress values ​​gradually increasing from bottom to top. The colors of each area of ​​inner tank 1 in the figure correspond to the colors in the color bars on the right.

[0070] like Figure 9 As shown, this is a stress distribution cloud map of the outer cladding layer 2. The color bars on the right side of the figure represent stress values ​​in Pa, with the color gradually changing from blue to red, and the corresponding stress values ​​gradually increasing from bottom to top. The colors of each region of the outer cladding layer 2 in the figure correspond to the colors in the color bars on the right.

[0071] Similarly, stress analysis can be performed on inner tank 1 and outer cladding layer 2 with thicknesses of 600mm, 700mm, 800mm, 900mm, and 1000mm respectively to obtain stress distribution cloud maps of inner tank 1 and outer cladding layer 2 under different thicknesses of outer cladding layer 2. Then, the stress changes of inner tank 1 and outer cladding layer 2 under concrete of different thicknesses can be analyzed, so that an appropriate thickness of outer cladding layer 2 can be selected for different working conditions, thereby reducing production costs while ensuring safety performance.

[0072] In some embodiments, such as Figure 3 and Figure 4 As shown, the outer cladding layer 2 is roughly rectangular in shape.

[0073] This makes it easier to pour ultra-high performance concrete, reducing construction difficulty and cost, while also improving construction efficiency.

[0074] like Figure 4 As shown, the thickness of the outer layer 2 refers to the shortest distance between each outer surface of the outer layer 2 and the outer wall of the inner tank 1.

[0075] In some embodiments, the outer cladding layer 2 is formed by casting.

[0076] The horizontal pressure storage tank of this invention includes the following construction steps: S1 Factory Prefabrication: The cylinder 11 is formed by cold rolling or hot rolling, and the cylinder 11 is welded to the head by argon arc welding to form a complete closed inner tank 1; S2 On-site construction: Using on-site pouring technology, the inner tank 1 is completely enclosed with ultra-high performance concrete, forming a complete horizontal pressure storage tank in one step.

[0077] The horizontal pressure storage tank of this invention has the following characteristics: I. This invention makes full use of the material properties of steel and ultra-high performance concrete. The inner tank 1 made of steel is used to provide good airtightness and partial corrosion resistance, while the outer cladding layer 2 made of ultra-high performance concrete is used to withstand internal pressure and provide excellent durability and impermeability. The combination of the two forms a structure with complementary performance.

[0078] Second, the horizontal pressure tank of the present invention has high corrosion resistance and is more suitable for use in underground environments. It can extend the service life of the pressure tank in the underground environment and reduce maintenance costs.

[0079] Third, the horizontal pressure tank of this invention has high pressure bearing capacity and can withstand internal gas and water pressure of 6 MPa. Furthermore, with the improvement of the performance of ultra-high performance concrete, the bearing pressure can be further enhanced, making it suitable for a wider range of application scenarios.

[0080] Fourth, the horizontal pressure tank of this invention is suitable for underground placement, which can effectively reduce the damage of the external environment to the tank, improve overall safety, and also reduce the impact on the surrounding environment.

[0081] Fifth, compared with pressure vessels made of metal materials in related technologies, the horizontal pressure storage tank of this invention has a lower cost and higher cost-effectiveness. Furthermore, the high strength characteristics of ultra-high performance concrete reduce the amount of metal material used in the inner tank 1, which can further reduce investment costs.

[0082] VI. The use of ultra-high performance concrete materials can reduce dependence on traditional steel, reduce resource consumption and environmental impact, and meet the requirements of sustainable development.

[0083] The horizontal pressure storage tank of this invention has significant advantages in terms of material properties, corrosion resistance, freeze resistance, impermeability, load-bearing capacity, safety, cost-effectiveness and environmental protection, and can meet the energy storage needs of the energy industry and adapt to diverse industrial application scenarios.

[0084] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0086] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0087] In this 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," "over," and "on top" of 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.

[0088] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the 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.

[0089] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A horizontal pressure storage tank, characterized in that, It includes an inner tank (1) and an outer layer (2). The inner tank (1) is made of metal and has a storage cavity. The outer layer (2) is wrapped around the outside of the inner tank (1) and is made of ultra-high performance concrete.

2. The horizontal pressure storage tank according to claim 1, characterized in that, The inner tank (1) includes a cylindrical body (11) and a first end cap (12) and a second end cap (13) respectively disposed at both ends of the cylindrical body (11). The first end cap (12), the second end cap (13) and the cylindrical body (11) together form the storage cavity.

3. The horizontal pressure storage tank according to claim 2, characterized in that, It also includes a reinforcing rib assembly (3), which is disposed on the inner wall and / or outer wall of the cylinder (11).

4. The horizontal pressure storage tank according to claim 3, characterized in that, The reinforcing rib assembly (3) includes a plurality of annular ribs (31) extending circumferentially along the cylinder (11), and the plurality of annular ribs (31) being spaced apart axially along the cylinder (11); and / or, The reinforcing rib assembly (3) includes a plurality of longitudinal ribs extending axially along the cylinder (11), and the plurality of longitudinal ribs are arranged at circumferential intervals along the cylinder (11); and / or, The reinforcing rib assembly (3) includes a spiral rib, which spirals around the cylinder (11) along its axial direction.

5. The horizontal pressure storage tank according to claim 2, characterized in that, The ratio of the axial length L of the cylinder (11) to the outer diameter D of the cylinder (11) is L / D, where L / D is 1~10.

6. The horizontal pressure storage tank according to claim 1, characterized in that, The wall thickness of the inner tank (1) is 12mm~16mm.

7. The horizontal pressure storage tank according to claim 6, characterized in that, The inner tank (1) has a reinforcing plate on its wall, and the horizontal pressure tank has a connection port that penetrates the reinforcing plate and the inner tank (1) wall.

8. The horizontal pressure storage tank according to any one of claims 1-7, characterized in that, The minimum thickness of the outer cladding layer (2) is 500mm~1000mm, and / or, The outer cladding layer (2) is generally rectangular in shape.

9. The horizontal pressure storage tank according to claim 2, characterized in that, At least one of the first end cap (12) and the second end cap (13) is a spherical end cap or an elliptical end cap.

10. The horizontal pressure storage tank according to claim 2, characterized in that, The cylinder (11) and the end cap are connected to each other by welding; and / or, The outer cladding layer (2) is made by casting.

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