Earth covering tank with multi-cavity structure

Abstract

The application discloses a kind of earth-covered storage tanks with multi-cavity structure, including storage tank body, storage tank body includes covering in earth-covered layer, covering in reinforcing layer Transition part And exposed in the exposed part outside earth-covered layer, storage tank body has storage cavity and protection cavity, storage cavity is located in earth-covered layer, the end of protection cavity away from storage cavity is located in exposed part, to avoid the influence of external environment in storage cavity.The cavity in the storage tank body is divided into the protection cavity of storage cavity in the application, and the storage cavity is completely located below the earth-covered layer, which can avoid the exposed part outside the earth-covered layer absorbing heat from the external environment and transferring to the stored material when the stored material in the storage tank body is liquefied hydrocarbon or other material that can easily produce boiling liquid expansion vapor explosion, thereby isolating the contact between the storage cavity and the external environment, and improving the safety of the tank body storage.

Description

Technical Field

[0001] This invention belongs to the field of soil-covered storage tank technology, specifically relating to a soil-covered storage tank with a multi-cavity structure. Background Technology

[0002] A soil-covered storage tank is a storage device completely covered by a soil layer. This effectively prevents explosions (BLEVEs) from the boiling liquid expansion vapors of liquefied hydrocarbons stored at ambient temperature and pressure. It is also protected from nearby heat sources, explosion shock waves, debris splashes, or other sudden damage. Furthermore, it offers advantages such as environmental aesthetics, reduced footprint, and shorter safe distances from nearby facilities. Currently, existing soil-covered storage tanks include underground, above-ground, and semi-above-ground types, but all employ a fully soil-covered structure, with only manholes and connecting pipes exposed on the soil surface.

[0003] When using covered storage tanks, the tank body will settle due to numerous factors, including the weight of the stored contents, rainwater erosion, crustal movement, and groundwater erosion. During the settlement process, because the external flange of the covered tank is far from the tank body, the settlement distance between the tank body and the external pipe is different, resulting in uneven settlement. This makes the external pipe prone to deformation or even cracking under stress, leading to leakage of the storage tank. Existing solutions include: one is to construct a culvert around the bottom pipe to allow the pipe to avoid the pressure of the cover structure, thus solving the problem of uneven settlement between the two; however, the enclosed space created by the culvert makes it difficult for maintenance and inspection personnel to enter and exit, making it impossible to inspect the external pipe within that space, potentially posing a safety hazard. Another solution is to use a top-in, top-out pipe configuration, connecting the external pipe to the top of the tank body, thus avoiding external forces affecting the external pipe; however, due to the large diameter of the tank, this top-in, top-out configuration requires a high-quality submersible pump, which is expensive and significantly increases construction costs.

[0004] To address the issues of deformation and cracking of external piping caused by uneven settlement, the inventors of this application propose a partially exposed, soil-covered storage tank design. This effectively avoids the aforementioned problems and facilitates maintenance and inspection of the external piping. Further research revealed that when the stored material in the soil-covered tank is liquefied hydrocarbons or other substances susceptible to external heat sources, the exposed tank portion is affected by the external environment, thus impacting the stored material. Therefore, it is necessary to reduce or eliminate the impact of external factors on the stored material. Summary of the Invention

[0005] The present invention provides a soil-covered storage tank with a multi-cavity structure to solve at least one of the above-mentioned technical problems.

[0006] The technical solution adopted in this invention is as follows: a soil-covered storage tank with a multi-cavity structure, comprising a tank body, the tank body including a soil-covered portion covered within a soil layer, a transition portion covered within a reinforcement layer, and an exposed portion exposed outside the soil layer, the tank body having a storage cavity and a protective cavity, the storage cavity being located within the soil-covered portion, at least a portion of the protective cavity being located within the exposed portion, and the protective cavity and the storage cavity being separated from each other.

[0007] Preferably, a partition plate is provided inside the main body of the storage tank, which divides the internal space of the main body of the storage tank into a storage cavity and a protective cavity.

[0008] Preferably, a reinforcing rib is provided between the partition plate and the main body of the storage tank to increase the compressive strength of the partition plate.

[0009] Preferably, the main body of the storage tank includes a storage tank and a protective tank connected to the storage tank, the internal space of the storage tank is a storage cavity, and the internal space of the protective tank is a protective cavity.

[0010] Preferably, a sealing plate is provided between the protective cavity and the storage cavity to form a sealed cavity between the protective cavity and the storage cavity, and a leakage detection device is provided in the sealed cavity.

[0011] Preferably, the protective cavity is filled with an inert gas.

[0012] Preferably, the protective cavity has a vacuum layer to reduce heat transfer between the outside environment and the protective cavity.

[0013] Preferably, the storage cavity is connected to an external pipe that extends through the protective cavity to the outside of the exposed portion. The external pipe is spaced apart from the ground to form a clearance space outside the external pipe.

[0014] Preferably, a low liquid level zone is formed inside the storage cavity, and the external pipe is connected to the low liquid level zone.

[0015] Preferably, a buffer device is provided between the transition portion and the reinforcing layer. The buffer device includes a buffer sleeve, which is sleeved on the outside of the transition portion, and a supporting material is filled between the buffer sleeve and the transition portion.

[0016] Preferably, the buffer sleeve is provided with a first waterproof layer at both ends, and a second waterproof layer is provided at the connection between the soil covering layer and the reinforcement layer.

[0017] Preferably, the tank body further includes a balancing section covered within the balancing layer, the balancing section being located at the end of the tank body away from the exposed portion.

[0018] Preferably, a balancing device is provided between the balancing part and the balancing layer. The balancing device includes a balancing sleeve, which is sleeved on the outside of the balancing part and coaxial with the main body of the storage tank. Supporting material is filled between the balancing sleeve and the balancing part.

[0019] Preferably, a third waterproof layer is provided at both ends of the balancing sleeve, and a fourth waterproof layer is provided at the connection between the soil covering layer and the balancing layer.

[0020] Preferably, the soil covering part is connected to a manhole, the manhole extends outside the soil covering layer, and a fitting sleeve is fitted to the outside of the manhole to provide movement space for the settlement of the manhole.

[0021] Preferably, the buffer sleeve includes a sleeve portion and an extension portion, the sleeve portion being sleeved on the outside of the tank body, and the extension portion extending axially along the tank body to protrude beyond the tank body.

[0022] Preferably, the lowest end of the extension is not higher than the horizontal plane where the axis of the tank body is located, and the extension has a soil protection part formed on the left and right sides, which extends in the horizontal direction; the bottom end of the soil protection part is connected to a support member, one end of the support member is connected to the soil protection part, and the other end is connected to the ground.

[0023] Due to the adoption of the above technical solution, the beneficial effects achieved by this invention are as follows:

[0024] 1. The tank body is divided into a protective chamber for the storage chamber. Part of the protective chamber is located in the exposed part, while the entire storage chamber is not exposed. When the tank body stores liquefied hydrocarbons or other substances that are prone to boiling, liquid expansion, vapor explosion, etc., the protective chamber exposed outside the cover layer will absorb heat from the external environment, such as sunlight and heat radiation from external heat sources. However, the storage chamber is located inside the cover layer, far away from the external environment, and therefore will not absorb heat from the environment. This ensures that the stored substances are not affected by the external environment, thus improving the safety of tank storage.

[0025] 2. By setting a vacuum layer inside the protective cavity, the properties of vacuum can be utilized to reduce or isolate heat transfer between the outside environment and the protective cavity, thereby further improving the safety of the main body of the storage tank.

[0026] 3. The protective cavity is filled with inert gas for protection. The properties of inert gas can serve two purposes: firstly, it can act as a heat insulator, reducing heat transfer between the external environment and the protective cavity; secondly, it has explosion-proof and fire-proof functions. When the stored contents leak into the protective cavity, the inert gas can prevent the stored contents from undergoing a chemical reaction, thereby improving the safety of the main body of the storage tank.

[0027] 4. The external nozzle extends beyond the protective cavity to the exposed part, while being spaced from the ground to create a clearance space on the outside of the external nozzle. During the settling of the tank body, the external nozzle will move downwards along with the tank body. During this downward movement, the clearance between the external nozzle and the ground provides space for the external nozzle to move downwards. In other words, the external nozzle will not interfere with the ground during its downward movement, thus effectively avoiding damage such as deformation and cracks to the external nozzle caused by the settling of the tank body. At the same time, the clearance space also facilitates maintenance personnel to carry out maintenance.

[0028] 5. The buffer sleeve serves two purposes: firstly, it provides support, preventing direct contact between the tank body and the reinforcement layer, thus protecting the tank body; secondly, it can absorb the stress between the tank body and the reinforcement layer caused by uneven settlement at both ends of the tank body through its own deformation, thereby preventing damage to the tank body during settlement. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0030] Figure 1 This is a schematic diagram of the structure of a soil-covered storage tank with a multi-cavity structure according to the present invention;

[0031] Figure 2 This is a schematic diagram of another soil-covered storage tank with a multi-cavity structure according to the present invention;

[0032] Figure 3 This is a schematic diagram of the sealed cavity and vacuum layer.

[0033] Figure 4 This is a schematic diagram of another soil-covered storage tank with a multi-cavity structure according to the present invention;

[0034] Figure 5 This is a schematic diagram of the mating structure between the storage tank body and the buffer sleeve according to the present invention;

[0035] Figure 6 This is a schematic diagram of another possible fit between the tank body and the buffer sleeve according to the present invention;

[0036] Figure 7 This is a schematic diagram of a possible assembly structure of the soil cover layer, the reinforcement layer, and the buffer sleeve according to the present invention.

[0037] Figure 8 This is a schematic diagram of another possible combination structure of the soil cover layer, the reinforcement layer and the buffer sleeve of the present invention;

[0038] Figure 9This is a schematic diagram of another possible combination structure of the soil cover layer, the reinforcement layer and the buffer sleeve of the present invention;

[0039] Figure 10 This is a schematic diagram of the cooperation structure between the partition plate and the reinforcing rib of the present invention.

[0040] Figure label:

[0041] 1. Tank body; 11. Covered section; 12. Transition section; 13. Exposed section; 14. Storage cavity; 15. Protective cavity; 16. Partition plate; 17. Reinforcing rib; 18. Low liquid level zone;

[0042] 2. Covering soil layer;

[0043] 3. Reinforcement layer;

[0044] 4. Storage tank; 41. Sealing plate; 42. Sealing cavity; 43. Vacuum layer;

[0045] 5. Protective tank;

[0046] 6. External control;

[0047] 7. Buffer device; 71. Buffer sleeve; 711. Sleeve part; 712. Extension part; 713. Soil protection part; 714. Support member; 72. Support material; 74. First waterproof layer; 75. Second waterproof layer;

[0048] 8. Balancing device; 81. Balancing sleeve; 83. Third waterproof layer; 84. Fourth waterproof layer;

[0049] 9. Manhole; 91. Fitting sleeve. Detailed Implementation

[0050] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0051] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0052] Furthermore, in the description of this invention, 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 accompanying drawings. They are only for the convenience of describing this 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 this invention.

[0053] 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 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 invention according to the specific circumstances.

[0054] In this invention, 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 "implementation," "example," "aspect," "specific example," or "specific example" 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 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.

[0055] According to one embodiment of the present invention, such as Figure 1 , Figure 2 As shown, a soil-covered storage tank with a multi-cavity structure includes a tank body 1. The tank body 1 includes a soil-covered portion 11 covered within a soil-covered layer 2, a transition portion 12 covered within a reinforcing layer 3, and an exposed portion 13 exposed outside the soil-covered layer 2. The tank body 1 has a storage cavity 14 and a protective cavity 15. The storage cavity 14 is located within the soil-covered portion 11. At least a portion of the protective cavity 15 is located within the exposed portion 13. The protective cavity 15 and the storage cavity 14 are separated from each other. Specifically, the protective cavity 15 can be partially located within the exposed portion 13 and the remaining portion within the transition portion 12, or partially located within the exposed portion 13, partially located within the transition portion 12, and the remaining portion within the soil-covered portion 11, or the entire portion can be located within the exposed portion 13, but it must be ensured that the storage cavity 14 is not located within the exposed portion 13. Specifically, the soil-covered storage tank 1 is a horizontal tank, and its arrangement can be above ground, underground, or semi-above ground. The soil cover layer 2 covering the soil-covered storage tank can be soil, gravel, concrete, or a combination thereof; the reinforcement layer can be piled stones, poured concrete, metal frame, or a combination thereof, or more specifically, such as... Figure 7 , Figure 8 , Figure 9 As shown, slopes are formed on both sides of the cover layer and the reinforcement layer to reduce the impact of rainwater erosion on the cover layer and the reinforcement layer.

[0056] It is understandable that when the storage tank body 1 contains liquefied hydrocarbons or other substances that are prone to boiling, liquid expansion, and vapor explosion, the exposed portion 13 outside the cover layer 2 easily absorbs heat from the external environment, such as sunlight and external heat sources. To prevent the heat absorbed by the exposed portion 13 from affecting the stored substances inside the storage tank body 1, the chambers within the storage tank body 1 are divided into protective chambers 15 for the storage chamber 14, and the storage chamber 14 is completely located below the cover layer 2. The exposed portion 13 of the storage tank body 1 serves as the protective chamber 15. In this case, the heat absorbed by the exposed portion 13 is directly exchanged with the protective chamber 15, preventing external heat from being transferred to the storage chamber 14. Specifically, there are various ways to configure the protective chamber 15 and the storage chamber 14; examples will be given below:

[0057] Method 1:

[0058] like Figure 1 As shown, a partition plate 16 is provided inside the main body 1 of the storage tank, dividing the internal space of the main body 1 into a storage cavity 14 and a protective cavity 15. The partition plate 16 is located in the soil-covered section 11, or between the transition section 12 and the soil-covered section 11, to ensure that the storage cavity 14 is completely within the soil-covered section 11. It should be noted that the purpose of the soil-covered storage tank is for storage. In order to increase the storage capacity, its volume is often large. This results in the soil-covered storage tank being under great pressure when filled with stored material. In order to increase the pressure resistance of the partition plate 16 and prevent damage or leakage caused by insufficient pressure resistance during storage, thus preventing the stored material in the storage cavity 14 from leaking into the protective cavity 15, on the one hand, the thickness of the partition plate 16 is increased to improve its mechanical strength; on the other hand, a reinforcing rib 17 is provided between the partition plate 16 and the main body 1 of the storage tank. One end of the reinforcing rib 17 is connected to the partition plate 16, and the other end is connected to the main body 1 of the storage tank. Figure 10 As shown, the reinforcing rib 17 can be a grid-shaped steel structure to enhance the load-bearing capacity of the partition plate 16.

[0059] Method 2:

[0060] like Figure 2 As shown, the main body 1 of the storage tank includes a storage tank 4 and a protective tank 5 externally connected to the storage tank 4. The internal space of the storage tank 4 is a storage cavity 14, and the internal space of the protective tank 5 is a protective cavity 15. Without changing the structure of the storage tank 4, the storage cavity 14 and the protective cavity 15 are separated by using an external protective tank 5. This allows the storage tank 4 to utilize its own properties to prevent the stored contents in the storage cavity 14 from leaking into the protective cavity 15.

[0061] More specifically, the structure of the protective tank 5 can be as follows: Figure 1 As shown, the diameter of its tank is the same as that of storage tank 4, and its axis coincides with the axis of storage tank 4. Alternatively, it can be as follows: Figure 2The flared structure shown has a tank body whose diameter gradually increases from the end connected to the storage tank 4 to the other end, and its axis coincides with the axis of the storage tank 4. The flared structure facilitates the connection between the protective tank 5 and the storage tank 4, which is typically achieved through welding. Furthermore, this structure prevents the reinforcing layer 3 and the covering layer 2 from slipping towards the exposed part 13 of the tank body 1, thus protecting the covering layer 2 and the reinforcing layer 3 and improving their stability.

[0062] It should be understood that the protective cavity 15 and the storage cavity can be arranged in other ways. The inventive concept of this application is based on using a segmented cavity method to completely cover the part containing the stored items under the soil cover 11, thereby avoiding the influence of the external environment on the stored items in the storage cavity 14. Therefore, any structural modifications to the main body 1 of the storage tank based on the inventive concept of this application should fall within the protection scope of this application.

[0063] Furthermore, to further monitor the storage cavity 14, a leak detection device can be installed within the protective cavity 15. The leak detection device is selected based on the contents of the storage cavity 14. When the stored material is gas or liquefied gas, a gas sensor is used. More specifically, a specific gas sensor can be selected based on the specific gas; for example, a methane sensor is used when the stored gas is methane. When the stored material is liquid, a liquid sensor is used. Moreover, the leak detection device should also include a signal transceiver. When a leak is detected, the leak information is transmitted to the monitoring system wirelessly or via a wired connection. Upon receiving the leak alarm signal, the monitoring system can react promptly, thereby reducing the risk caused by the leakage of stored materials.

[0064] In a preferred embodiment, to further improve the safety of the stored items in the storage cavity 14, an inert gas is filled into the protective cavity 15 for protection. It is understood that if the protective cavity 15 is filled with an inert gas, the detection performance of the leakage detection device installed within the protective cavity 15 may be affected by the inert gas. Therefore, to avoid this effect, such as... Figure 1 , Figure 3 As shown, a sealing plate 41 can be provided between the protective cavity 15 and the storage cavity 14 to form a sealed cavity 42 between the protective cavity 15 and the storage cavity 14, and the leakage detection device is placed in the sealed cavity 42.

[0065] Furthermore, such as Figure 1 , Figure 3As shown, by utilizing the characteristics of vacuum, heat transfer between the outside world and the protective cavity 15 is reduced or isolated. A vacuum layer 43 is provided inside the protective cavity 15. The vacuum layer 43 can be partitioned by setting a partition to create a vacuum cavity on its inner wall, or it can be provided by setting a vacuum plate on its inner wall.

[0066] A preferred embodiment, such as Figure 1 , Figure 2 As shown, after dividing the main body of the storage tank 1 into a storage cavity 14 and a protective cavity 15, an external pipe 6 is connected to the storage cavity 14 to facilitate the outflow of stored materials. The external pipe 6 extends beyond the protective cavity 15 to the exposed portion 13, and is spaced apart from the ground to form a clearance space on its outside. During the settling process of the main body of the storage tank 1, the external pipe 6 moves downward as the main body of the storage tank 1 settles. During this downward movement, due to the clearance between the external pipe 6 and the ground, there is space for the external pipe 6 to move downward. In other words, the external pipe 6 will not interfere with the ground during its downward movement, thus effectively avoiding damage to the external pipe 6 caused by the settling of the main body of the storage tank 1. Furthermore, to facilitate the outflow of stored materials from the storage cavity 14, a low-level zone 18 is formed within the storage cavity 14, and the external pipe 6 is connected to the low-level zone 18. The low liquid level zone 18 can be a recessed area formed on the tank body 1, such that when the tank body 1 is placed parallel to the horizontal plane in its axial direction, the lowest point of the recessed area is lower than the lowest point of the tank body 1 in contact with the cover layer 2, thereby facilitating the outflow of the stored material in the storage cavity 14.

[0067] The low-level zone 18 can also be a structure similar to a steam drum downcomer connected to the main body 1 of the storage tank. The low-level zone 18 includes a cylindrical part vertically connected to the main body 1 of the storage tank and a hemispherical part at the bottom of the cylindrical part. One end of the external pipe 6 extends into the hemispherical part and has a gap with the bottom of the low-level zone 18. On the one hand, this design facilitates the molding of the low-level zone 18 and the main body 1 of the storage tank and can ensure the strength of the main body 1 of the storage tank. On the other hand, as the liquid level of the stored material inside the main body 1 of the storage tank decreases, the stored material at the bottom of the tank collects in the low-level zone, thereby facilitating the outflow of the stored material through the external pipe 6.

[0068] According to one embodiment of the present invention, such as Figure 1As shown, a buffer device 7 is provided between the transition section 12 and the reinforcing layer 3. The buffer device 7 includes a buffer sleeve 71, which is fitted onto the outside of the transition section 12 and coaxial with the tank body 1. The buffer sleeve 71 can be made of metal materials such as steel or aluminum profiles, or precast components such as reinforced concrete, possessing strong mechanical strength. When placed on the outside of the tank body 1, it can provide support and protection. The buffer sleeve 71 can also be made of elastic materials such as rubber, hard silicone, or resin. On the one hand, it provides support; on the other hand, it can absorb the stress between the tank body 1 and the reinforcing layer 3 caused by uneven settlement at both ends of the tank body 1 through its own deformation. To facilitate the installation of the buffer sleeve 71 on the surface of the tank body 1, an interference fit is required between the buffer sleeve 71 and the tank body 1. This arrangement will create a gap between the buffer sleeve 71 and the tank body 1, which is eliminated by filling with a support material 72. The support material 72 can be polyurethane foam, hard rubber, etc.

[0069] It is important to note that due to the interference fit between the buffer sleeve 71 and the main body of the storage tank 1, the gap is filled by the supporting material 72. During rainy or snowy weather, rainwater seeps into the cover layer 2 and easily flows out through this gap. This rainwater erosion can cause corrosion to the tank body and promote the growth of moss and other vegetation. Furthermore, the easy erosion can lead to uneven settlement at both ends of the tank. To prevent rainwater erosion, a first waterproof layer 74 is installed at both ends of the buffer sleeve 71, and a second waterproof layer 75 is installed at the connection between the cover layer 2 and the reinforcement layer 3. The waterproof layer can employ a multi-layer structure, such as using waterproof membranes or waterproof coatings (flexible polyurea) to enhance the waterproofing effect.

[0070] A preferred embodiment, such as Figure 1 , Figure 4 As shown, since the reinforcement layer can provide good support for the main body of the storage tank, thus coping with the settlement of the main body of the storage tank, the settlement distance of the exposed part of the main body of the storage tank will be less than the settlement distance of the soil-covered part of the main body of the storage tank. In order to make the settlement distances of the two ends of the main body of the storage tank equal, a balancing part is added to the soil-covered part of the main body of the storage tank. The balancing part is covered within the balancing layer. Furthermore, the balancing part is located at the end of the main body of the storage tank away from the exposed part.

[0071] Furthermore, to ensure uniform settlement of the tank body, the balancing layer and the reinforcement layer need to be installed using the same method. Specifically, a balancing device 8 is installed between the balancing section and the balancing layer. The balancing device 8 includes a balancing sleeve 81, which is fitted onto the outside of the balancing section and coaxial with the tank body. Supporting material is filled between the balancing sleeve 81 and the balancing section. The balancing device 8 acts as a buffer device, which will not be described in detail here. To reduce the impact of rainwater erosion on the settlement of the balancing sleeve 81 of the tank body, a third waterproof layer 83 is installed at both ends of the balancing sleeve 81, and a fourth waterproof layer 84 is installed at the connection between the soil cover layer and the balancing layer. The waterproof layer can adopt a multi-layer structure, such as using waterproof membranes or waterproof coatings (flexible polyurea) to enhance the waterproofing effect.

[0072] Furthermore, the soil cover 11 is connected to a manhole 9, which extends beyond the soil cover layer 2. A fitting sleeve 91 is fitted to the outer side of the manhole 9 to provide space for its settlement. Specifically, as the tank body 1 settles, the manhole 9 will descend along with it. During this descent, the outer wall of the manhole 9 will experience frictional resistance from the soil cover layer 2, making it easy for the surface of the manhole to be scratched by the soil, which can easily lead to corrosion. With the fitting sleeve 91, the fitting sleeve 91 and the manhole 9 are fitted together, preventing scratches during the descent of the soil-covered tank 1. More specifically, the fitting sleeve 91 also includes a platform parallel to the horizontal plane, which is located above the soil cover layer 2.

[0073] According to one embodiment of the present invention, such as Figure 5 As shown, the buffer sleeve 71 includes a sleeve portion 711 and an extension portion 712. The sleeve portion 711 is sleeved on the outside of the tank body 1, and the extension portion 712 extends axially along the tank body 1 to protrude beyond the tank body 712. This allows the extension portion 712 to... Figure 7 As shown, the upper part of the exposed portion 13 is covered, and the extension 712 can provide support for the reinforcing layer 3, that is, as... Figure 7 The reinforcement layer 3 shown can extend to cover the upper part of the exposed portion 13, thereby reducing the impact of direct sunlight on the exposed portion 13. More specifically, in order for the extension 712 to cover the upper half of the exposed portion 13, the lowest point of the extension 712 should not be higher than the horizontal plane containing the axis of the tank body 1. It should be noted that in order to avoid interference between the extension 712 and the external connecting pipe 6, the lowest point of the extension 712 should be higher than the highest point of the external connecting pipe 6. Furthermore, as... Figure 6 As shown, protective soil sections 713 are formed on the left and right sides of the extension 712. These protective soil sections 713 extend horizontally, allowing them to support the overhead area on both sides of the tank body 1, thus facilitating maintenance personnel's access to the external pipeline 6 for inspection and maintenance. Furthermore, as... Figure 8As shown, the reinforcing layer 3 covers the end of the exposed portion 13 of the tank body 1. Furthermore, a support member 714 is connected to the bottom of the protective soil section 713, with one end of the support member 714 connected to the protective soil section 713 and the other end connected to the ground. The support member 714 supports the protective soil section 713, thereby increasing the strength of the reinforcing layer 3.

[0074] For any parts not mentioned in this invention, existing technologies can be used or referenced.

[0075] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0076] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A soil-covered storage tank with a multi-cavity structure, comprising a tank body, characterized in that, The main body of the storage tank includes a soil-covered section within a soil cover layer, a transition section within a reinforcement layer, and an exposed section outside the soil cover layer. The reinforcement layer is located at the outer edge of the soil-covered section. A buffer device is provided between the transition section and the reinforcement layer. The buffer device includes a buffer sleeve, which is fitted onto the outside of the transition section. The main body of the storage tank has a storage cavity and a protective cavity. A partition plate is provided inside the main body of the storage tank, which divides the internal space of the main body of the storage tank into the storage cavity and the protective cavity. The protective cavity is filled with inert gas. The storage cavity is located within the soil cover layer, and at least a portion of the protective cavity is located within the exposed section. The protective cavity and the storage cavity are separated from each other. An external pipe is connected to the storage cavity. The external pipe extends through the protective cavity to the outside of the exposed section. The external pipe is spaced apart from the ground to form a clearance space outside the external pipe.

2. The soil-covered storage tank with a multi-cavity structure according to claim 1, characterized in that, The partition plate is reinforced with ribs between itself and the main body of the storage tank to increase the compressive strength of the partition plate.

3. The soil-covered storage tank with a multi-cavity structure according to claim 1, characterized in that, The main body of the storage tank includes a storage tank and a protective tank connected to the storage tank. The internal space of the storage tank is a storage cavity, and the internal space of the protective tank is a protective cavity.

4. The soil-covered storage tank with a multi-cavity structure according to claim 1 or 3, characterized in that, A sealing plate is provided between the protective cavity and the storage cavity to form a sealed cavity between the protective cavity and the storage cavity, and a leakage detection device is provided inside the sealed cavity.

5. The soil-covered storage tank with a multi-cavity structure according to claim 1, characterized in that, The space between the buffer sleeve and the transition section is filled with supporting material.

6. The soil-covered storage tank with a multi-cavity structure according to claim 5, characterized in that, The buffer sleeve includes a sleeve portion and an extension portion. The sleeve portion is sleeved on the outside of the tank body, and the extension portion extends along the axial direction of the tank body to extend beyond the tank body.

7. The soil-covered storage tank with a multi-cavity structure according to claim 6, characterized in that, The lowest point of the extension is not higher than the horizontal plane where the axis of the main body of the storage tank is located. Protective soil sections are formed on the left and right sides of the extension, and the protective soil sections extend in the horizontal direction. A support member is connected to the bottom of the protective soil section. One end of the support member is connected to the protective soil section, and the other end is connected to the ground.

Images