A storage tank bottom structure

Abstract

This invention provides a tank bottom plate structure, including a sandwich bottom plate, reinforcing ribs, a rib leakage monitoring component, and a sandwich leakage monitoring component. The sandwich bottom plate is divided into multiple independent sandwich monitoring zones by the reinforcing ribs. The sandwich leakage monitoring component is installed in each of the sandwich monitoring zones, and the rib leakage monitoring component is installed within the reinforcing ribs. This invention has the advantages of zoned monitoring and simultaneous monitoring of rib and bottom plate sandwich leaks.

Description

Technical Field

[0001] This invention relates to the field of leak-proof bottom protection for storage tanks, and more particularly to a storage tank bottom plate structure. Background Technology

[0002] Storage tanks typically have a service life exceeding thirty years. However, due to water accumulation on the tank bottom plate causing electrolytic and chemical corrosion, the actual service life of the bottom plate differs significantly from the designed life of the tank. In some cases, corrosion perforation may occur as early as five years. Replacing the bottom plate with a steel tank is a massive undertaking, involving hot work operations in the tank area, which is cumbersome and poses significant safety hazards. Furthermore, replacing the bottom plate with a steel tank does not necessarily resolve the corrosion problem.

[0003] To address the poor corrosion resistance of storage tank bottom plates, existing tank bottom plates typically use materials such as unsaturated polyester resin and epoxy resin for corrosion protection. However, these existing bottom plates are usually single-layer anti-corrosion structures, lacking leak detection capabilities and unable to determine whether a leak has occurred. Furthermore, if a leak does occur with existing bottom plates, it will contaminate the entire tank bottom plate, requiring replacement of the entire lining, a complex and costly process. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a tank bottom plate structure that can be monitored in sections and can simultaneously monitor the leakage of the reinforcing ribs and the bottom plate interlayer.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by this invention is as follows:

[0006] A tank bottom plate structure includes a sandwich bottom plate, a partition reinforcing rib, a reinforcing rib leakage monitoring component, and a sandwich leakage monitoring component. The sandwich bottom plate is divided into multiple independent sandwich monitoring zones by the partition reinforcing rib. The sandwich leakage monitoring component is installed in each of the sandwich monitoring zones, and the reinforcing rib leakage monitoring component is installed inside the partition reinforcing rib.

[0007] As a further improvement to the above technical solution:

[0008] The reinforcing rib includes a reinforcing rib base plate and a reinforcing rib cover plate. The reinforcing rib base plate is provided with a monitoring groove, and the reinforcing rib cover plate is disposed above the monitoring groove to form a monitoring sealed space. The reinforcing rib leakage monitoring component is disposed within the sealed monitoring space.

[0009] The reinforcing rib leakage monitoring component includes a conductive unit, two monitoring wires respectively disposed on the two side walls of the monitoring groove, and multiple partitions arranged along the length of the monitoring groove; the monitoring sealing space is divided into multiple reinforcing rib monitoring areas by the partitions, and each reinforcing rib monitoring area is provided with a set of the conductive unit.

[0010] The conductive unit includes a monitoring resistor and a conductive block. The conductive block is arranged in the middle of the monitoring area of ​​each group of reinforcing ribs, and the monitoring resistor is arranged on one of the monitoring wires.

[0011] The monitoring groove has a conductive block mounting groove arranged along the length of the monitoring groove in the middle; there are at least two sets of conductive block mounting grooves, and each set of conductive block mounting grooves is arranged side by side along the width of the monitoring groove.

[0012] The interlayer leakage monitoring component includes a vacuum monitoring tube, which is installed on the outer wall of the partition reinforcing rib; the vacuum monitoring tube has a through hole arranged along the length of the vacuum monitoring tube, and the through hole communicates with the interlayer monitoring area.

[0013] The outer wall of the reinforcing rib is an arc-shaped outer wall, and the vacuum monitoring tube is an arc-shaped vacuum tube adapted to the arc-shaped outer wall.

[0014] The sandwich base plate includes a bottom layer, a base layer, a hollow sandwich layer and a seepage-proof surface layer stacked from bottom to top. The reinforcing ribs are located between the base layer and the seepage-proof surface layer, and the sandwich leakage monitoring component is located in the hollow sandwich layer.

[0015] When the underlying layer has corrosion pits, a repair layer is applied inside the corrosion pits.

[0016] The base layer, the impermeable layer, and the repair layer are all made of resin, which is epoxy resin, unsaturated polyester resin, or vinyl resin.

[0017] Compared with the prior art, the advantages of the present invention are as follows:

[0018] The tank bottom plate structure of this invention includes a sandwich bottom plate, reinforcing ribs, a rib leakage monitoring component, and a sandwich leakage monitoring component. The sandwich bottom plate is divided into multiple independent sandwich monitoring zones by the reinforcing ribs. The reinforcing ribs divide the tank bottom plate into zones, improving the overall structural strength and rigidity of the tank bottom plate, and ensuring that leakage in one area does not affect the performance of other areas, thus preventing contamination of the entire tank bottom plate. Simultaneously, the sandwich leakage monitoring component is installed within each sandwich monitoring zone, and the reinforcing rib leakage monitoring component is installed within the reinforcing ribs. This invention can simultaneously monitor leakage within the reinforcing ribs and each sandwich monitoring zone, ensuring effective monitoring of leakage across the entire tank bottom plate. Furthermore, its layout is compact and occupies little space. Attached Figure Description

[0019] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0020] Figure 1This is a partial structural diagram of the tank bottom plate structure of the present invention.

[0021] Figure 2 yes Figure 1 A schematic diagram of its decomposed structure.

[0022] Figure 3 This is a schematic diagram showing the positional relationship between the reinforcing ribs and the sandwich bottom plate of the present invention.

[0023] Figure 4 This is a front view of the sandwich base plate of the present invention.

[0024] Figure 5 yes Figure 4 An enlarged schematic diagram of part A.

[0025] Figure 6 This is a schematic diagram showing the positional relationship between the bottom layer, the base layer, and the hollow interlayer of this invention.

[0026] Figure 7 This is a schematic diagram showing the positional relationship between the reinforcing ribs and the base layer of this invention.

[0027] Figure 8 This is a schematic diagram showing the positional relationship between the impermeable surface layer and the hollow interlayer of the present invention.

[0028] The labels in the diagram represent:

[0029] 1. Sandwich base plate; 11. Bottom layer; 12. Base layer; 13. Hollow sandwich layer; 14. Impermeable surface layer; 2. Separating reinforcing rib; 21. Reinforcing rib base plate; 22. Reinforcing rib cover plate; 23. Monitoring groove; 24. Conductive block mounting groove; 3. Reinforcing rib leakage monitoring assembly; 31. Conductive unit; 311. Monitoring resistor; 312. Conductive block; 32. Monitoring wire; 33. Partition plate; 34. Reinforcing rib monitoring area; 4. Sandwich leakage monitoring assembly; 41. Vacuum monitoring tube; 5. Sandwich monitoring area. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection of the present invention.

[0031] like Figures 1 to 4An embodiment of the tank bottom plate structure of the present invention is shown. This tank bottom plate structure can be applied to the bottom plate repair and leakage monitoring of vertical storage tanks in oil depots and refineries. In this embodiment, the tank bottom plate structure includes a sandwich bottom plate 1, reinforcing ribs 2, a reinforcing rib leakage monitoring component 3, and a sandwich leakage monitoring component 4. The sandwich bottom plate 1 is divided into multiple independent sandwich monitoring areas 5 by the reinforcing ribs 2. The setting of the reinforcing ribs 2 enables the tank bottom plate to be divided into sections, which not only improves the structural strength and rigidity of the entire tank bottom plate, but also ensures that leakage in one area does not affect the performance of other areas, thus avoiding the problem of contamination of the entire tank bottom plate.

[0032] Meanwhile, the interlayer leakage monitoring component 4 is installed in each interlayer monitoring zone 5, and the reinforcing rib leakage monitoring component 3 is installed in the separating reinforcing rib 2. That is, while realizing leakage monitoring in each interlayer monitoring zone 5, the present invention can also realize leakage monitoring at the location of the separating reinforcing rib 2, which ensures effective monitoring of leakage in the entire tank bottom plate, and the monitoring structure is compact and occupies little space.

[0033] like Figure 2 As shown, the reinforcing rib 2 includes a reinforcing rib base plate 21 and a reinforcing rib cover plate 22. The reinforcing rib base plate 21 has a monitoring groove 23, and the reinforcing rib cover plate 22 is positioned above the monitoring groove 23 to form a monitoring sealed space. The reinforcing rib leakage monitoring component 3 is disposed within the sealed monitoring space. When the reinforcing rib 2 is damaged, oil will enter the sealed monitoring space. At this time, the leakage of oil at the reinforcing rib 2 can be monitored by the reinforcing rib leakage monitoring component 3. Monitoring is convenient, and disassembly and installation are convenient after leakage.

[0034] Furthermore, the reinforcing rib leakage monitoring component 3 includes a conductive unit 31, two monitoring wires 32, and multiple partitions 33. The two monitoring wires 32 are respectively disposed on the two side walls of the monitoring groove 23; the multiple partitions 33 are arranged along the length of the monitoring groove 23, dividing the monitoring sealing space into multiple reinforcing rib monitoring areas 34 by the partitions 33, and each reinforcing rib monitoring area 34 is equipped with a set of conductive units 31. Its structural layout is simple and compact.

[0035] Simultaneously, when the reinforcing rib 2 leaks in a certain area, the conductive unit 31 of the reinforcing rib monitoring area 34 in that area will connect to the monitoring wire 32, forming a current loop, thereby realizing leakage monitoring of the reinforcing rib in a certain area. That is, the present invention uses a partition 33 to divide the monitoring sealed space into multiple reinforcing rib monitoring areas 34, so that when oil and water leak, they can only penetrate at the leak point, and other areas are not affected. Therefore, the continuity point can be determined according to the current magnitude, so as to determine the precise location of the oil and water leakage at the reinforcing rib 2.

[0036] In this embodiment, the conductive unit 31 includes a monitoring resistor 311 and a conductive block 312. The conductive block 312 is arranged in the middle of each set of reinforcing rib monitoring areas 34, and the monitoring resistor 311 is connected in series with one set of monitoring wires 32. When the reinforcing rib 2 is damaged, oil (or water) enters the corresponding reinforcing rib monitoring area 34. The conductive block 312 will dissolve in the oil (or water), thereby connecting the monitoring wires 32 to form a current loop and realize the leakage monitoring function.

[0037] Furthermore, a conductive block mounting groove 24 is provided in the middle of the monitoring groove 23. The conductive block mounting groove 24 is arranged along the length direction of the monitoring groove 23, and conductive blocks 312 are arranged at intervals within the conductive block mounting groove 24. Figure 2 As shown, in this embodiment, there are three sets of conductive block mounting slots 24, which are arranged side by side along the width direction of the monitoring groove 23 to further improve the leakage monitoring effect of the reinforcing rib monitoring area 34. In other embodiments, the number of conductive block mounting slots 24 can be adjusted according to the actual situation, such as two sets, four sets, etc.

[0038] like Figure 1 and Figure 2 As shown, the interlayer leakage monitoring component 4 includes a vacuum monitoring tube 41, which is installed on the outer wall of the reinforcing rib 2 and connected to a vacuum monitoring device outside the tank. The vacuum monitoring tube 41 also has a through hole arranged along its length and communicating with the interlayer monitoring area 5 to ensure efficient vacuuming. By evacuating the interlayer through the vacuum monitoring tube 41, it is possible to determine whether a leak has occurred in the tank bottom plate. If the vacuum pressure drops to a threshold value, it indicates a leak has occurred.

[0039] Furthermore, the outer wall of the reinforcing rib 2 is an arc-shaped outer wall, and the vacuum monitoring tube 41 is an arc-shaped vacuum tube adapted to the arc-shaped outer wall. This not only ensures the effective fixation of the vacuum monitoring tube 41, but also prevents the vacuum monitoring tube 41 from being squeezed and deformed by external forces.

[0040] like Figures 4 to 8 As shown, in this embodiment, the sandwich panel 1 includes a bottom layer 11, a base layer 12, a hollow interlayer 13, and a waterproof surface layer 14, stacked sequentially from bottom to top. The base layer 12 is laid on the bottom layer 11, providing a foundation for subsequent layers; the hollow interlayer 13 provides installation space for the interlayer leakage monitoring component 4; and the waterproof surface layer 14 improves the waterproof performance and strength of the sandwich panel 1. The arrangement of multiple functional layers effectively enhances the corrosion resistance and leakage prevention capabilities of the sandwich panel 1, and allows for direct repair of the panel on the corroded bottom layer 11 without the need to replace the panel or perform hot work. Meanwhile, the reinforcing ribs 2 are located between the base layer 12 and the waterproof surface layer 14, and the interlayer leakage monitoring component 4 is located in the hollow interlayer 13. Its structure is compact and occupies little space.

[0041] Furthermore, when the bottom layer 11 has corrosion pits, a repair layer is laid inside the corrosion pits to effectively reinforce the severely corroded areas. In this embodiment, the base layer 12, the impermeable surface layer 14, and the repair layer are all made of resin. The resin is epoxy resin, unsaturated polyester resin, or vinyl resin. That is, except for the hollow interlayer 13, all other layers in this invention use the same type of resin matrix, which allows the layers to fuse together.

[0042] In this embodiment, the repair layer has 20-40% chopped glass fiber or carbon fiber added to the resin base, and the impermeable surface layer 14 has 50% glass fiber or glass mat added to the resin base. This is to improve the strength of the sandwich base plate 1 while meeting the functional requirements of each layer.

[0043] like Figure 3 As shown, in this embodiment, there are two reinforcing ribs 2, which are arranged longitudinally and transversely to form four independent interlayer monitoring zones 5. This facilitates accurate monitoring of leakage in each zone and ensures that leakage in one zone does not affect the performance of other zones. Simultaneously, the reinforcing ribs 2 strengthen the bottom plate of the tank while providing a good seal for the hollow interlayer 13, preventing rupture of the hollow interlayer 13 due to inadequate sealing at the reinforcing ribs 2. In other embodiments, the number of reinforcing ribs 2 and the number of interlayer monitoring zones 5 can be adjusted according to the size of the tank; for example, three, five, or six interlayer monitoring zones 5 can be used.

[0044] The specific implementation steps of the tank bottom plate structure of the present invention are as follows: 1) Sandblasting and rust removal of the bottom layer 11. The bottom layer 11 is cleaned and then sandblasted to remove rust, achieving a rust removal grade of Sa2.5; 2) Repair of corrosion pits in the bottom layer 11 and construction of the base layer 12. After repairing the corrosion pits, the base layer 12 is applied to the bottom layer 11 with a thickness of 0.4-0.6mm; 3) Construction of reinforcing ribs. The separating reinforcing rib 2 and the conductive block 312 are integrally die-cast, the separating reinforcing rib 2 is bonded to the base layer 12, the monitoring wire 32 is embedded in the two side walls of the monitoring groove 23, the partition plate 33 is bonded and installed in the monitoring groove 23, and then the cover plate of the separating reinforcing rib 2 is installed on the top of the partition plate 33 and sealed; 4) Construction of the vacuum monitoring tube 41 and the hollow interlayer 13. A hollow interlayer 13 is laid at the edge of the reinforcing rib 2 and the edge area of ​​the tank wall. A vacuum monitoring tube 41 is laid at the joint between the reinforcing rib 2 and the hollow interlayer 13. The vacuum monitoring tube 41 is embedded into the arc-shaped outer wall of the reinforcing rib 2, and epoxy resin is used for bonding if necessary; 5) Construction of the anti-seepage surface layer 14. The anti-seepage surface layer 14 is coated on the upper surface of the reinforcing rib 2 and the upper surface of the hollow interlayer 13; 6) The monitoring wire 32 and the vacuum monitoring tube 41 are led out of the tank. A hole is drilled in the tank wall, and the monitoring wire 32 and the vacuum monitoring tube 41 are led out of the tank through the hole and connected to the vacuum monitoring device to realize leakage monitoring of the tank bottom plate.

[0045] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A tank bottom plate structure, characterized in that, The device includes a sandwich base plate, reinforcing ribs, a rib leakage monitoring component, and a sandwich leakage monitoring component. The sandwich base plate is divided into multiple independent sandwich monitoring zones by the reinforcing ribs. The sandwich leakage monitoring component is installed in each of the sandwich monitoring zones. The rib leakage monitoring component is installed within the reinforcing ribs. Each reinforcing rib includes a reinforcing rib base plate and a reinforcing rib cover plate. The reinforcing rib base plate has a monitoring groove, and the reinforcing rib cover plate is disposed above the monitoring groove to form a sealed monitoring space. The rib leakage monitoring component is disposed within the sealed monitoring space. The reinforcing rib leakage monitoring component includes a conductive unit, two monitoring wires respectively disposed on the side walls of the monitoring groove, and multiple partitions arranged along the length of the monitoring groove. The monitoring sealing space is divided into multiple reinforcing rib monitoring areas by the partitions. Each reinforcing rib monitoring area is provided with a set of the conductive unit. The conductive unit includes a monitoring resistor and a conductive block. The conductive block is arranged in the middle of each set of reinforcing rib monitoring areas. The monitoring resistor is arranged on one set of monitoring wires. The conductive block is configured to dissolve when oil or water leaks, so as to connect the monitoring wires and form a current loop.

2. The tank bottom plate structure according to claim 1, characterized in that, The monitoring groove has a conductive block mounting groove arranged along the length of the monitoring groove in the middle; there are at least two sets of conductive block mounting grooves, and each set of conductive block mounting grooves is arranged side by side along the width of the monitoring groove.

3. The tank bottom plate structure according to claim 1 or 2, characterized in that, The interlayer leakage monitoring component includes a vacuum monitoring tube, which is installed on the outer wall of the partition reinforcing rib; the vacuum monitoring tube has a through hole arranged along the length of the vacuum monitoring tube, and the through hole communicates with the interlayer monitoring area.

4. The tank bottom plate structure according to claim 3, characterized in that, The outer wall of the reinforcing rib is an arc-shaped outer wall, and the vacuum monitoring tube is an arc-shaped vacuum tube adapted to the arc-shaped outer wall.

5. The tank bottom plate structure according to claim 1 or 2, characterized in that, The sandwich base plate includes a bottom layer, a base layer, a hollow sandwich layer and a seepage-proof surface layer stacked from bottom to top. The reinforcing ribs are located between the base layer and the seepage-proof surface layer, and the sandwich leakage monitoring component is located in the hollow sandwich layer.

6. The tank bottom plate structure according to claim 5, characterized in that, When the underlying layer has corrosion pits, a repair layer is applied inside the corrosion pits.

7. The tank bottom plate structure according to claim 6, characterized in that, The base layer, the impermeable layer, and the repair layer are all made of resin, which is epoxy resin, unsaturated polyester resin, or vinyl resin.

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