Double-walled buried storage tank

Abstract

The utility model provides double -deck buried storage tank belongs to the technical field of storage container, it has solved the problem of poor stability of existing buried storage tank. The double -deck buried storage tank of the utility model includes inner casing and outer casing, and the cavity is between the inner casing and the outer casing, and the bottom of both ends of the outer casing is fixedly connected with the support seat, a plurality of support strips in the form of long strip are fixedly connected in the cavity of each support seat just above, each support strip is arranged along the longitudinal direction of the inner casing, and the bottom of each support strip and the inner side wall of the outer casing are provided with the flow -through hole for fluid. The double -deck buried storage tank has the advantages of good stability.

Description

Technical Field

[0001] This utility model belongs to the field of storage container technology, and relates to double-layered buried storage tanks. Background Technology

[0002] Buried storage tanks, also known as underground storage tanks, are specially designed and installed underground for long-term storage of various liquids or liquefied gases. To eliminate the risk of leakage, buried storage tanks generally adopt a double-walled structure.

[0003] Existing double-walled underground storage tanks, such as the novel double-walled underground storage tank disclosed in Chinese patent literature [Patent No.: 202222614347.8; Application Publication No.: CN218808011U], include a tank body and a detection riser. The tank body includes an inner shell and an outer shell, with a cavity formed between the inner shell and the outer shell. A detection hole is provided on the inner shell corresponding to the bottom of the detection riser, which facilitates the entry of the detection medium into the cavity between the inner shell and the outer shell for leakage detection. The upper end of the detection riser passes through the upper part of the inner shell and the outer shell, and the lower end extends downward to the lower inner surface of the inner shell. A protective plate is welded to the lower inner surface of the inner shell, and the protective plate is sleeved on the outer side of the lower end of the detection riser and welded to the wall of the detection riser.

[0004] The installation of this type of double-walled underground storage tank requires first digging a pit in the ground, then laying sand and gravel on the pit floor, placing the double-walled storage tank on top of the sand and gravel, and finally filling the pit with soil to cover the tank. However, laying sand and gravel on the double-walled storage tank results in uneven support and uneven pressure exerted by the soil. Furthermore, since the tank is buried underground, groundwater exerts buoyancy on it, leading to uneven stress on different parts of the tank. This can easily cause the tank to settle or shift, resulting in deformation, damage, and leakage. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a double-layered underground storage tank, which solves the technical problem of how to improve the stability of the installation of the double-layered underground storage tank.

[0006] The objective of this utility model can be achieved through the following technical solution: a double-layered buried storage tank, comprising an inner shell and an outer shell, wherein a cavity exists between the inner shell and the outer shell, characterized in that a support base is fixedly connected to the bottom of both ends of the outer shell, and a plurality of elongated support strips are fixedly connected at intervals in the cavity directly above each support base, each support strip is arranged longitudinally along the inner shell, and a flow hole for fluid passage is provided between the bottom of each support strip and the inner sidewall of the outer shell.

[0007] During installation, a foundation pit is first excavated. The double-walled underground storage tank is then placed in the pit and secured with fasteners such as expansion bolts, which are inserted into hard soil or concrete and tightened. This secures the tank to the pit. Finally, soil is backfilled into the pit to cover the tank, completing the installation. The support base ensures the tank is firmly fixed in the pit, distributing stress evenly and reducing the likelihood of settlement or displacement. Support bars prevent stress concentration at the support bases, preventing deformation and improving installation stability. The flow-through holes allow the liquid to flow freely through the holes to a designated location in case of leakage in the inner shell, facilitating detection.

[0008] In the aforementioned double-walled underground storage tank, the support base includes a base and an arc-shaped support plate. The support plate is fixedly connected to the top of the base and is fitted and fixedly connected to the circumferential outer wall of the bottom of the outer shell. The base is arranged radially along the outer shell. This structure increases the contact area between the support base and the tank and the soil, allowing the support base to better connect the tank and the soil, thus improving the stability of the double-walled underground storage tank installation.

[0009] In the aforementioned double-walled buried storage tank, the base has several filling grooves that extend through the sides of the base. This structure allows soil to be embedded in the filling grooves, improving the stability of the support and enabling the support to better connect the tank body and the soil, thereby enhancing the stability of the double-walled buried storage tank installation.

[0010] In the aforementioned double-walled underground storage tank, the support bars are either annular or arc-shaped. This structure ensures that the support bars can fit snugly into the cavity.

[0011] In the aforementioned double-walled underground storage tank, the length of the support plate is greater than the length of the support bar, and the two ends of the support bar are recessed relative to the two ends of the support plate. This structure ensures that both the support bar and the support plate provide optimal stress distribution, resulting in uniform stress distribution within the double-walled underground storage tank and preventing stress concentration.

[0012] In the aforementioned double-walled underground storage tank, the outer wall at the bottom of the support bar is recessed upwards to form the flow hole. This structure facilitates the formation of the flow hole and ensures that the liquid in the cavity can flow through the flow hole to the designated location, making it easy to detect.

[0013] In the aforementioned double-walled underground storage tank, the inner wall of the support strip is fitted and fixedly connected to the outer circumferential wall of the bottom of the inner shell, and the outer wall of the support strip is fitted and fixedly connected to the inner circumferential wall of the bottom of the outer shell. This structure allows the support strip to fit better between the inner and outer shells, avoiding stress concentration at the support base, preventing deformation of the double-walled underground storage tank, and thus improving the stability of the double-walled underground storage tank installation.

[0014] In the aforementioned double-walled underground storage tank, a detection tube is further included, arranged vertically. The bottom of the outer shell has a downwardly recessed groove. The bottom of the detection tube passes through the bottom of the inner shell and extends into the groove, while the top of the detection tube passes through the top of the outer shell and is positioned above it. If the inner shell leaks, liquid flows into the groove through the cavity and flow holes. The detection tube can detect whether there is liquid in the groove, thus determining whether the double-walled underground storage tank is leaking.

[0015] Compared with the prior art, the double-walled underground storage tank provided by this utility model has the following advantages:

[0016] 1. The double-layer buried storage tank is fixed in the foundation pit by the setting of the support base, so that the double-layer buried storage tank is evenly stressed, which can reduce the possibility of settlement or displacement of the double-layer buried storage tank and improve the stability of the installation of the double-layer buried storage tank.

[0017] 2. This double-walled underground storage tank is equipped with support bars at the support base to avoid the problem of stress concentration at the support base, so that the double-walled underground storage tank will not deform, thereby improving the stability of the installation of the double-walled underground storage tank. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this double-layered underground storage tank.

[0019] Figure 2 This is a cross-sectional view of the overall structure of this double-layered underground storage tank.

[0020] Figure 3 This is a double-walled underground storage tank. Figure 2 Enlarged view of area A, as well as enlarged view of the support strip and flow hole.

[0021] Figure 4 This is a schematic diagram of the overall structure of the support base and support bars of this double-layer underground storage tank, as well as an enlarged view of the flow hole.

[0022] In the figure, 1 is the inner shell; 2 is the outer shell; 3 is the cavity; 4 is the support base; 41 is the base; 411 is the filling groove; 42 is the support plate; 5 is the support bar; 51 is the flow hole; 6 is the detection tube; and 7 is the groove. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figure 1 , Figure 2 As shown, the double-walled underground storage tank includes an inner shell 1, an outer shell 2, a support base 4, support bars 5, and a detection tube 6.

[0025] The inner shell 1 is fixedly connected to the outer shell 2, such as Figure 3 , Figure 4 As shown, a cavity 3 exists between the inner shell 1 and the outer shell 2. Support seats 4 are fixedly connected to the bottom of both ends of the outer shell 2. Each support seat 4 includes a base 41 and an arc-shaped support plate 42. The support plate 42 is fixedly connected to the top of the base 41 and is fitted and fixed to the circumferential outer wall of the bottom of the outer shell 2. The base 41 is arranged radially along the outer shell 2. In this embodiment, the base 41 has seven filling grooves 411 that penetrate the side of the base 41. In actual production, the number of filling grooves 411 can be five or eleven.

[0026] In this embodiment, ten elongated support bars 5 are fixedly connected at intervals in the cavity 3 directly above each support base 4. Each support bar 5 is arranged along the longitudinal direction of the inner shell 1. The support bar 5 is arc-shaped. The inner sidewall of the support bar 5 is attached to the outer circumferential sidewall of the bottom of the inner shell 1, and the outer sidewall of the support bar 5 is attached to the inner circumferential sidewall of the bottom of the outer shell 2. In actual production, the number of support bars 5 can be eight or sixteen, and the support bars 5 are circular.

[0027] The length of the support plate 42 is greater than the length of the support bar 5, and the two ends of the support bar 5 are recessed relative to the two ends of the support plate 42. Each support bar 5 has a flow hole 51 between its bottom and the inner wall of the outer casing 2 for fluid passage. Specifically, the outer wall of the bottom of the support bar 5 is recessed upward to form the flow hole 51.

[0028] The detection tube 6 is arranged vertically, and the bottom of the outer shell 2 has a recessed groove 7. The bottom of the detection tube 6 passes through the bottom of the inner shell 1 and extends into the groove 7, and the top of the detection tube 6 passes through the top of the outer shell 2 and is located above the outer shell 2.

[0029] During installation, first dig a foundation pit, then place the double-layer buried storage tank in the pit, and use fasteners such as expansion bolts to insert into hard soil or concrete and lock them in place, so that the double-layer buried storage tank is fixed to the foundation pit. Finally, fill the foundation pit with soil to cover the double-layer buried storage tank to complete the installation.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0031] Although this document frequently uses terms such as inner shell 1, outer shell 2, cavity 3, support 4, base 41, filling groove 411, support plate 42, support strip 5, flow hole 51, detection tube 6, and groove 7, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A double-walled underground storage tank, comprising an inner shell (1) and an outer shell (2), wherein a cavity (3) is provided between the inner shell (1) and the outer shell (2), characterized in that, Support seats (4) are fixedly connected to the bottom of both ends of the outer shell (2). Several long strip-shaped support bars (5) are fixedly connected at intervals in the cavity (3) directly above each support seat (4). Each support bar (5) is arranged along the longitudinal direction of the inner shell (1). Each support bar (5) has a flow hole (51) between its bottom and the inner wall of the outer shell (2) for fluid to pass through.

2. The double-walled underground storage tank according to claim 1, characterized in that, The support base (4) includes a base (41) and an arc-shaped support plate (42). The support plate (42) is fixed to the top of the base (41). The support plate (42) is attached to the circumferential outer wall of the bottom of the outer shell (2). The base (41) is arranged radially along the outer shell (2).

3. The double-walled underground storage tank according to claim 2, characterized in that, The base (41) has a plurality of filling grooves (411) that penetrate the side of the base (41).

4. The double-walled underground storage tank according to claim 1, 2, or 3, characterized in that, The support bar (5) is circular or arc-shaped.

5. The double-walled underground storage tank according to claim 2 or 3, characterized in that, The length of the support plate (42) is greater than the length of the support bar (5), and the two ends of the support bar (5) are recessed relative to the two ends of the support plate (42).

6. The double-walled underground storage tank according to claim 1, 2, or 3, characterized in that, The outer side wall at the bottom of the support bar (5) is recessed upward to form the flow hole (51).

7. The double-walled underground storage tank according to claim 1, 2, or 3, characterized in that, The inner wall of the support strip (5) is attached and fixed to the outer circumferential wall of the bottom of the inner shell (1), and the outer wall of the support strip (5) is attached and fixed to the inner circumferential wall of the bottom of the outer shell (2).

8. The double-walled underground storage tank according to claim 1, 2, or 3, characterized in that, The double-walled underground storage tank also includes a detection tube (6) arranged in a vertical direction. The bottom of the outer shell (2) has a recessed groove (7). The bottom of the detection tube (6) passes through the bottom of the inner shell (1) and extends into the groove (7). The top of the detection tube (6) passes through the top of the outer shell (2) and is located above the outer shell (2).

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