Circular bottom plate and storage tank used in storage tanks

Abstract

This utility model provides a circular bottom plate and a storage tank for use in storage tanks. The circular bottom plate includes multiple bottom plate units, which are spliced ​​together to form a circular bottom plate. Each bottom plate unit has a connecting portion on its edge, and the connecting portions of two adjacent bottom plate units overlap vertically and are connected by fasteners. The storage tank includes an annular tank wall, and the circular bottom plate is fixed to the bottom of the tank wall by fasteners. This utility model solves the defects of existing welded bottom plates, such as short structural life, poor sealing, complex process, and high cost, by simplifying the storage tank processing technology, saving costs, improving the sealing performance of the storage tank, and improving maintenance convenience, thereby comprehensively improving the performance and lifespan of the storage tank.

Description

Technical Field

[0001] This utility model relates to the field of storage tank processing technology, and in particular to a circular bottom plate and storage tank for use in storage tanks. Background Technology

[0002] In the use of circular storage tanks, the bottom plate plays an important role in support and sealing. Traditionally, the bottom plate of circular storage tanks is mostly fixed to the bottom of the tank by welding, which has many drawbacks.

[0003] First, uneven metal shrinkage caused by localized high temperatures during welding can lead to deformation of the base plate. Uneven heating and cooling during welding can also create residual tensile stress within the base plate, which, when combined with external loads, may accelerate crack propagation, resulting in overall structural instability and reduced sealing of the storage tank. Second, stress concentration is prone to occur at the annular fillet weld connecting the base plate and the tank wall. Long-term exposure to hydrostatic pressure, temperature changes, or seismic loads can lead to weld fatigue cracking, resulting in leakage or structural fracture. Third, high welding temperatures alter the metallographic structure of the base material, increasing hardness and decreasing toughness in the heat-affected zone, creating a potential crack initiation area and shortening the structural lifespan. Fourth, the weld area... Differences in composition and microstructure (such as the potential difference between the welding material and the base material) can easily lead to electrochemical corrosion, especially in humid environments or environments containing corrosive media (such as Cl⁻, H₂S), which can easily cause leakage and pose a safety hazard to the storage of flammable and toxic media; fifth, internal defects in the weld (such as incomplete penetration) are difficult to detect completely by conventional means and require high-precision testing (such as radiographic testing, ultrasonic testing) to be found. Moreover, the welding process requires professional welding equipment and technicians, the welding process is complex, time-consuming, and costly; and once the base plate is damaged after welding, it is difficult to repair and often requires the replacement of the entire base plate, which increases maintenance costs and time.

[0004] Therefore, there is an urgent need to provide improved base plate connection methods and structures to solve the above problems. Utility Model Content

[0005] This utility model provides a circular bottom plate and storage tank for use in storage tanks, which solves the defects of the existing technology of using welded bottom plates, such as short structural life, poor sealing, complex process and high cost. It simplifies the storage tank processing technology, saves costs, improves the sealing performance of the storage tank and improves the convenience of maintenance, so as to comprehensively improve the performance and life of the storage tank.

[0006] This utility model provides a circular bottom plate for use in storage tanks, comprising:

[0007] Multiple base plate units are spliced ​​together to form a circular base plate;

[0008] Each of the base plate units has a connecting part on its edge, and the connecting parts of two adjacent base plate units overlap vertically and are connected by fasteners;

[0009] The storage tank includes an annular tank wall, and the circular bottom plate is fixed to the bottom of the tank wall by fasteners.

[0010] According to the present invention, a circular bottom plate for use in storage tanks is provided. The circular bottom plate includes at least two rings of plate parts spliced ​​together in the radial direction. The innermost ring is a circular bottom plate unit, and the outer rings sequentially outward each include multiple polygonal bottom plate units.

[0011] According to the present invention, a circular bottom plate for use in a storage tank is provided. The circular bottom plate includes a first ring plate portion and a second ring plate portion arranged sequentially from the outside to the inside in the radial direction. The first ring plate portion includes a first bottom plate unit and a second bottom plate unit that are adjacent in the circumferential direction. The connecting portion of the second bottom plate unit on the side closer to the first bottom plate unit overlaps the corresponding connecting portion of the first bottom plate unit.

[0012] The second ring plate portion includes a third base plate unit and a fourth base plate unit that are adjacent in the circumferential direction. The connecting portion of the third base plate unit on the side closer to the first base plate unit overlaps with the corresponding connecting portion of the first base plate unit. The connecting portion of the fourth base plate unit on the side closer to the second base plate unit overlaps with the corresponding connecting portion of the second base plate unit. The connecting portion of the fourth base plate unit on the side closer to the third base plate unit overlaps with the corresponding connecting portion of the third base plate unit.

[0013] According to the present invention, a circular bottom plate for use in a storage tank is provided, wherein the second bottom plate unit and the third bottom plate unit are provided with chamfers at opposite corners, and the second bottom plate unit and the third bottom plate unit are joined together by chamfers.

[0014] According to the present invention, a circular bottom plate for use in storage tanks is provided, wherein a sealant is provided between the connecting parts of two adjacent bottom plate units.

[0015] According to the present invention, a circular bottom plate is applied to a storage tank, wherein the circular bottom plate and the tank wall are fixedly connected by inverted T-shaped stirrups.

[0016] According to the present invention, a circular bottom plate for use in a storage tank is provided, wherein the inverted T-shaped stirrup includes a horizontally extending first connecting plate and a second connecting plate, and a third connecting plate extending upward from the connection between the first connecting plate and the second connecting plate.

[0017] The first connecting plate is located below the circular base plate and the two are fastened together. The third connecting plate is located on the outside of the tank wall and the two are fastened together.

[0018] According to the present invention, a circular bottom plate for use in a storage tank is provided, wherein multiple inverted T-shaped stirrups are provided and are sequentially butt-welded together along the circumferential direction;

[0019] An L-shaped waterstop plate is provided between the circular base plate and the tank wall. The vertical part of the waterstop plate abuts against the inner wall of the tank wall, and the horizontal part of the waterstop plate is located between the circular base plate and the first connecting plate.

[0020] The waterstop plate is installed at the butt weld of two adjacent inverted T-shaped stirrups.

[0021] According to the present invention, a circular bottom plate for use in storage tanks is provided, wherein the bottom plate unit is a steel plate and the surface of the steel plate is integrally formed with a corrosion-resistant coating.

[0022] This utility model also provides a storage tank, including the circular bottom plate applied to the storage tank as described above.

[0023] This invention provides a circular bottom plate and storage tank for use in storage tanks. The circular bottom plate is formed by splicing multiple bottom plate units, replacing welding and avoiding welding defects. The fasteners have high adaptability and the connection through the fasteners has a certain degree of flexibility, which can absorb deformation caused by minor foundation settlement or earthquakes, reducing the risk of tearing of rigid welded joints. The fastener connection ensures uniform load distribution, eliminating stress concentration and deformation problems caused by welding, especially the circumferential / radial stress generated after the tank is filled with liquid, reducing the risk of bottom plate cracking and improving structural stability.

[0024] Adjacent base plate units are detachably connected, facilitating assembly and disassembly. Installation eliminates the need for complex welding processes, reducing installation difficulty and cost. During maintenance, only the damaged base plate unit needs to be removed and replaced, rather than the entire base plate, significantly saving maintenance time and costs. It can be used for temporary liquid storage projects, and the equipment can be moved and reused after completion. The absence of open flame welding eliminates the fire and explosion hazards associated with flammable and explosive environments; it also reduces occupational hazards such as welding fumes and arc light, improving the working environment for construction workers. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this utility model 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 utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the circular base plate provided by this utility model.

[0027] Figure 2yes Figure 1 A schematic diagram showing the overlapping of some base plate units in a circular base plate.

[0028] Figure 3 yes Figure 1 A schematic diagram of the structure of the circular base plate during assembly and its interaction with related accessories. Figure 1 .

[0029] Figure 4 yes Figure 1 A schematic diagram of the structure of the circular base plate during assembly and its interaction with related accessories. Figure 2 .

[0030] Figure 5 yes Figure 1 A partial cross-sectional view of the circular base plate being assembled with the tank wall.

[0031] Figure label:

[0032] 10. Base plate unit; 11. Connecting part; 111. Mounting hole; 12. Fastener; 13. Tank wall; 14. First ring plate; 15. Second ring plate; 16. Third ring plate; 17. Fourth ring plate; 141. First base plate unit; 142. Second base plate unit; 151. Third base plate unit; 152. Fourth base plate unit; 18. Chamfer; 19. Inverted T-shaped stirrup; 191. First connecting plate; 192. Second connecting plate; 193. Third connecting plate; 194. Weld; 20. Waterstop plate; 100. Circular base plate; 110. Concrete substrate; 120. Chemical anchor; 130. Asphalt wood fiber board. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions 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 scope of protection of this utility model.

[0034] In the description of this utility model, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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 this utility model.

[0035] In this utility model, 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 communication connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. 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.

[0037] like Figures 1 to 5 As shown, this utility model provides a circular bottom plate 100 for use in storage tanks, comprising:

[0038] Multiple base plate units 10 are spliced ​​together to form a circular base plate 100;

[0039] Each of the base plate units 10 has a connecting part 11 on its edge, and the connecting parts 11 of two adjacent base plate units 10 overlap vertically and are connected by fasteners 12.

[0040] The storage tank includes an annular tank wall 13, and the circular bottom plate 100 is fixed to the bottom of the tank wall 13 by fasteners 12.

[0041] The circular base plate 100 of this invention is formed by splicing multiple base plate units 10 into a single base plate. Each base plate unit 10 is small in size, easy to manufacture, and therefore simple in process. The multiple base plate units 10 are connected by fasteners 12, achieving a detachable connection. When a base plate unit 10 deforms or its performance deteriorates, only the failed unit needs to be replaced, avoiding the need to replace the entire base plate in existing technologies, thus saving time and costs. No welding process is required between the base plate units 10 or between the circular base plate 100 and the tank wall 13, simplifying the assembly process, avoiding welding defects, and thus improving the sealing performance and lifespan of the storage tank.

[0042] Specifically, the connecting part 11 has multiple spaced mounting holes 111. The fasteners 12 include bolts, nuts, and washers. Adjacent base plate units 10 are securely connected by bolts and nuts passing through the mounting holes 111, resulting in a simple structure and reliable connection. Adjacent base plate units 10 are overlapped, allowing the mounting holes 111 of adjacent base plate units 10 to align with the fasteners 12, providing convenient and reliable assembly. The overlap orientation of adjacent base plate units 10 is unrestricted; one base plate unit 10 can be positioned below the other, adjusted according to actual needs. To improve connection strength, in some embodiments, the area where the connecting part 11 is located is thickened compared to other areas of the base plate unit 10 to ensure the strength of the connection, prevent cracking, and extend the service life of the structure. Preferably, the bolts can be made of stainless steel or galvanized material to reduce electrochemical corrosion at the connection, making them particularly suitable for humid and salt spray environments.

[0043] The circular base plate 100 of this application can be designed with different sizes depending on the diameter of different tanks. It includes at least two rings of plate portions spliced ​​together in the radial direction, with the innermost ring being a circular base plate unit, and the outer rings sequentially outward each including multiple polygonal base plate units. For example, the circular base plate 100 may include two rings of plate portions to have a relatively small size; or the circular base plate 100 may include three, four, five or more rings of plate portions to have a relatively large size, which can be adjusted according to the actual required size.

[0044] In a preferred embodiment of this application, the circular base plate 100 includes a first ring plate portion 14, a second ring plate portion 15, a third ring plate portion 16, and a fourth ring plate portion 17 arranged sequentially from the outside to the inside in the radial direction; the first ring plate portion 14, the second ring plate portion 15, and the third ring plate portion 16 each include a plurality of quadrilateral base plate units 10, and the fourth ring plate portion 17 is a circular base plate unit 10.

[0045] like Figure 1 As shown, a circular base plate 100 is provided with four rings of plates. Through a partitioned design, each ring uses base plate units 10 of different sizes, while the same ring uses base plate units 10 of the same size. This facilitates prefabrication in the factory, enables modular production, increases the flexibility of base plate splicing, and improves assembly efficiency. The quadrilateral base plate units 10 are, for example, trapezoidal or approximately trapezoidal, and the fourth ring of plates 17 is a circular or approximately circular base plate unit 10.

[0046] Specifically, when splicing multiple rings of plates, the first ring of plates 14, the second ring of plates 15, the third ring of plates 16 and the fourth ring of plates 17 can be spliced ​​sequentially from the outside to the inside. Alternatively, two or three adjacent rings of plates can be spliced ​​locally at the same time, and then spliced ​​along the circumference. This application does not limit the splicing and can be adjusted according to actual needs.

[0047] The following describes a splicing method using a portion of the base plate unit 10 of the first ring plate section 14 and the second ring plate section 15 as an example.

[0048] like Figure 2 As shown, the first ring plate portion 14 includes a first base plate unit 141 and a second base plate unit 142 that are adjacent in the circumferential direction. The connecting portion 11 of the second base plate unit 142 near the first base plate unit 141 overlaps the corresponding connecting portion 11 of the first base plate unit 141.

[0049] The second ring plate portion 15 includes a third base plate unit 151 and a fourth base plate unit 152 that are adjacent in the circumferential direction. The connecting portion 11 of the third base plate unit 151 near the first base plate unit 141 overlaps with the corresponding connecting portion 11 of the first base plate unit 141. The connecting portion 11 of the fourth base plate unit 152 near the second base plate unit 142 overlaps with the corresponding connecting portion 11 of the second base plate unit 142. The connecting portion 11 of the fourth base plate unit 152 near the third base plate unit 151 overlaps with the corresponding connecting portion 11 of the third base plate unit 151.

[0050] Figure 2 The plates can be overlapped counterclockwise along the circumference. Some connecting parts 11 of the first base plate unit 141 are in the lower layer. The second base plate unit 142 and the third base plate unit 151 can overlap the first base plate unit 141 to form the middle layer. Some connecting parts 11 of the fourth base plate unit 152 overlap the second base plate unit 142 and the third base plate unit 151 to form the upper layer. They are assembled sequentially from the outside to the inside, which is simple to operate. Other base plate units 10 along the circumference of the first ring plate part 14 and the second ring plate part 15 are also spliced ​​in the same way. Similarly, the base plate units 10 between the second ring plate part 15 and the third ring plate part 16 can also be spliced ​​in a similar way, which will not be described in detail here.

[0051] Furthermore, the second base plate unit 142 and the third base plate unit 151 are both provided with chamfers 18 at opposite corners, and the second base plate unit 142 and the third base plate unit 151 are joined together by the chamfers 18.

[0052] like Figure 2As shown, by setting a chamfer 18, the diagonal corners of the second base plate unit 142 and the third base plate unit 151 can be seamlessly joined, forming a mounting hole 111 at this location. This mounting hole 111 can be located on the second base plate unit 142, the third base plate unit 151, or it can be formed by the second base plate unit 142 and the third base plate unit 151 joined together through two semi-circular holes; this application does not impose any limitations. Fasteners 12 sequentially pass through the mounting holes 111 at corresponding positions on the fourth base plate unit 152, the mounting holes 111 formed by the joining of the second and third base plate units 142, and the mounting holes 111 at corresponding positions on the first base plate unit 141, thereby achieving the connection between multiple base plate units 10.

[0053] like Figure 2 As shown, chamfers 18 are also provided at other positions of the first base plate unit 141, the third base plate unit 151 and the fourth base plate unit 152 to facilitate docking with other adjacent base plate units 10, which helps to improve assembly efficiency.

[0054] To improve the sealing performance of the circular base plate 100, as a preferred embodiment, a sealant is applied between the connection portions 11 of two adjacent base plate units 10. The sealant can fill the minute gaps (e.g., 0.1-3mm) between the base plate units 10 after bolting, mitigating leakage risks that are difficult to eliminate with traditional processes and ensuring the tank's sealing performance. Furthermore, by applying sealant to the connection portions 11 of the base plate units 10, adjacent base plate units 10 can be pre-positioned using the sealant, ensuring that the corresponding mounting holes 111 are always aligned. This reduces installation difficulty and improves assembly efficiency when installing the fasteners 12.

[0055] In a preferred embodiment, the circular base plate 100 and the tank wall 13 are fixedly connected by inverted T-shaped stirrups 19. Figure 5 As shown, the inverted T-shaped stirrup 19 serves as an intermediate connecting structure to connect the circular base plate 100 and the tank wall 13. The circular base plate 100 and the tank wall 13 can be fastened to the inverted T-shaped stirrup 19 respectively. The process is simple and the connection is reliable.

[0056] In some embodiments, such as Figure 3 and Figure 5 As shown, the inverted T-shaped stirrup 19 includes a horizontally extending first connecting plate 191 and second connecting plate 192, and a third connecting plate 193 extending upward from the connection between the first connecting plate 191 and the second connecting plate 192. The first connecting plate 191 is located below the circular base plate 100 and the two are fastened together. The third connecting plate 193 is located on the outside of the tank wall 13 and the two are fastened together. The first connecting plate 191, the second connecting plate 192, and the third connecting plate 193 are integrally formed, which can ensure structural strength and improve the connection between the circular base plate 100 and the tank wall 13.

[0057] Furthermore, such as Figure 3 As shown, multiple inverted T-shaped stirrups 19 are provided and sequentially butt-welded together along the circumference, forming a ring distribution. To improve sealing, an L-shaped waterstop 20 is provided between the circular base plate 100 and the tank wall 13. The vertical part of the waterstop 20 abuts against the inner wall of the tank wall 13, and the horizontal part of the waterstop 20 is located between the circular base plate 100 and the first connecting plate 191. The waterstop 20 is located at the butt weld 194 of two adjacent inverted T-shaped stirrups 19. This prevents gas or liquid in the storage tank from leaking at the weld 194, thereby improving sealing. In addition, the waterstop 20 also prevents external liquids in contact with the storage tank, such as rainwater and liquids on the ground, from seeping into the storage tank through the weld 194, thus providing a waterproof function. The waterstop 20 can be made of materials such as galvanized steel plate, stainless steel plate, or rubber, enhancing the waterproof performance of the structure by physically blocking and extending the seepage path.

[0058] like Figure 4 As shown, the same fastener 12 can sequentially pass through the horizontal portion of the circular base plate 100 and the waterstop plate 20 to be fastened to the inverted T-shaped stirrup 19, which can save assembly steps, reduce the use of fasteners 12, and improve assembly efficiency. Similarly, the same fastener 12 can sequentially pass through the inverted T-shaped stirrup 19 and the tank wall 13 to be fastened to the vertical portion of the waterstop plate 20, which can save assembly steps, reduce the use of fasteners 12, and improve assembly efficiency.

[0059] Furthermore, the second connecting plate 192 of the inverted T-shaped stirrup 19 can be fixed to the concrete substrate 110 by chemical anchors 120, thereby improving the stability of the storage tank.

[0060] Furthermore, such as Figure 5 As shown, at the location where the storage tank is placed, a buffer structure with a certain degree of flexibility, such as asphalt wood fiberboard 130, can be set below the circular base plate 100. It can receive the stress concentration or impact caused by the fasteners 12, improve the stability of the storage tank, prevent the fasteners 12 from bumping or rubbing against the foundation surface, and thus improve the storage tank's operating environment.

[0061] The base plate unit 10 of this application can be made of steel plate, with a thickness of, for example, 3-8 mm. Furthermore, to improve the corrosion resistance of the base plate, a corrosion-resistant coating, such as enamel or epoxy coating, can be applied to the surface of the steel plate, depending on actual needs. This significantly improves the corrosion resistance of the base plate and extends its service life, making it particularly suitable for storage tanks storing corrosive media. Traditional welded base plates require anti-corrosion coating after welding and flaw detection. However, insufficient adhesion between the coating and the base plate surface leads to damage and rust after short-term use. In contrast, the base plate unit 10 of this invention can directly employ enamel or epoxy coating during production, resulting in a tighter bond between the coating and the steel plate surface. This effectively prevents the intrusion of corrosive media, thus better protecting the steel plate, preventing rust, and extending the service life of the base plate.

[0062] The circular base plate 100 described in this application is bolted together without welding, reducing on-site work. The steel plates are prefabricated in the factory, saving costs and shortening the construction period. Multiple base plate units 10 are spliced ​​together, facilitating disassembly, inspection, and component replacement, thus reducing maintenance costs. The circular base plate 100 can be used for temporary liquid storage projects, and the equipment can be moved and reused after completion. The base plate unit 10, using both enamel-lined steel plates and epoxy-coated steel plates, offers better corrosion resistance and weather resistance, and allows for flexible adjustment of the installation position. The flexible connection of the bolted base plate better adapts to uneven foundation settlement, improving the seismic resistance of the storage tank.

[0063] This utility model also provides a storage tank, including a circular bottom plate 100 and an annular tank wall 13 as described in the above embodiment, wherein the circular bottom plate 100 is fixed to the bottom of the tank wall 13 by fasteners 12.

[0064] The circular bottom plate 100 and storage tank provided by this utility model are formed by splicing multiple bottom plate units 10 to replace welding, thus avoiding welding defects. The fasteners 12 have high adaptability and the connection through the fasteners 12 has a certain degree of flexibility, which can absorb deformation caused by slight foundation settlement or earthquakes and reduce the risk of tearing of rigid welded joints. The connection through the fasteners 12 makes the load distribution uniform, eliminating the problems of stress concentration and deformation caused by welding, especially the circumferential / radial stress generated after the tank is filled with liquid, reducing the risk of bottom plate cracking and improving the stability of the structure.

[0065] Adjacent base plate units 10 are detachably connected, facilitating assembly and disassembly of the base plate. Installation eliminates the need for complex welding processes, reducing installation difficulty and cost. During maintenance, only the damaged base plate unit 10 needs to be removed and replaced, without replacing the entire base plate, significantly saving maintenance time and costs. It can be used for temporary liquid storage projects, and the equipment can be moved and reused after completion. The absence of open flame welding eliminates the fire and explosion hazards associated with flammable and explosive environments; it also reduces occupational hazards such as welding fumes and arc light, improving the working environment for construction workers.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model 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. Such 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 this utility model.

Claims

1. A circular bottom plate (100) for use in a storage tank, characterized in that, include: Multiple base plate units (10) are spliced ​​together to form a circular base plate (100). Each of the base plate units (10) is provided with a connecting part (11) at its edge. The connecting parts (11) of two adjacent base plate units (10) overlap vertically and are connected by fasteners (12). The storage tank includes an annular tank wall (13), and the circular bottom plate (100) is fixed to the bottom of the tank wall (13) by fasteners (12).

2. The circular bottom plate (100) for use in a storage tank according to claim 1, characterized in that, The circular base plate (100) includes at least two rings of plate parts spliced ​​together in the radial direction. The innermost ring is a circular base plate unit (10), and the outer rings outwards each include multiple polygonal base plate units (10).

3. The circular bottom plate (100) for use in a storage tank according to claim 2, characterized in that, The circular base plate (100) includes a first ring plate portion (14) and a second ring plate portion (15) arranged sequentially from the outside to the inside in the radial direction. The first ring plate portion (14) includes a first base plate unit (141) and a second base plate unit (142) that are adjacent in the circumferential direction. The connecting portion (11) of the second base plate unit (142) on the side of the first base plate unit (141) overlaps the corresponding connecting portion (11) of the first base plate unit (141). The second ring plate portion (15) includes a third base plate unit (151) and a fourth base plate unit (152) that are adjacent in the circumferential direction. The connecting portion (11) of the third base plate unit (151) near the first base plate unit (141) overlaps with the corresponding connecting portion (11) of the first base plate unit (141). The connecting portion (11) of the fourth base plate unit (152) near the second base plate unit (142) overlaps with the corresponding connecting portion (11) of the second base plate unit (142). The connecting portion (11) of the fourth base plate unit (152) near the third base plate unit (151) overlaps with the corresponding connecting portion (11) of the third base plate unit (151).

4. The circular bottom plate (100) for use in a storage tank according to claim 3, characterized in that, The second base plate unit (142) and the third base plate unit (151) are provided with chamfers (18) at opposite corners, and the second base plate unit (142) and the third base plate unit (151) are joined together by the chamfers (18).

5. The circular bottom plate (100) for use in a storage tank according to claim 1, characterized in that, A sealant is provided between the connection (11) of two adjacent base plate units (10).

6. The circular bottom plate (100) for use in a storage tank according to any one of claims 1-5, characterized in that, The circular base plate (100) and the tank wall (13) are fixedly connected by inverted T-shaped stirrups (19).

7. The circular bottom plate (100) for a storage tank according to claim 6, characterized in that, The inverted T-shaped stirrup (19) includes a horizontally extending first connecting plate (191) and a second connecting plate (192) and a third connecting plate (193) extending upward from the connection between the first connecting plate (191) and the second connecting plate (192). The first connecting plate (191) is located below the circular base plate (100) and the two are fastened together. The third connecting plate (193) is located on the outside of the tank wall (13) and the two are fastened together.

8. The circular bottom plate (100) for use in a storage tank according to claim 7, characterized in that, The inverted T-shaped stirrups (19) are provided in multiples and are connected by welding in sequence along the circumferential direction; An L-shaped waterstop plate (20) is provided between the circular base plate (100) and the tank wall (13). The vertical part of the waterstop plate (20) abuts against the inner wall of the tank wall (13), and the horizontal part of the waterstop plate (20) is provided between the circular base plate (100) and the first connecting plate (191). The waterstop plate (20) is set at the butt weld (194) of two adjacent inverted T-shaped stirrups (19).

9. The circular bottom plate (100) for use in a storage tank according to any one of claims 1-5, characterized in that, The base plate unit (10) is a steel plate, and the surface of the steel plate is integrally formed with a corrosion-resistant coating.

10. A storage tank characterized by, Includes the circular bottom plate (100) applied to the storage tank as described in any one of claims 1 to 9.

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