An HDPE water storage module

Abstract

The utility model discloses a kind of HDPE water storage modules, it is related to rainwater collection technical field, including several water storage unit modules and side plate assembly, water storage unit module includes mirror image setting upper module and lower module, detachably several reinforcing columns are equipped between upper module and lower module;Upper module and lower module all include open web plate, open web reinforcing plate and several fixed circular platform, open web reinforcing plate is set in open web connecting plate side, several installation grooves are equipped on open web connecting plate, and several fixed circular platform are respectively installed in several installation grooves;The one end of several fixed circular platform in upper module and lower module respectively contact, and the both ends of several reinforcing columns respectively penetrate open web connecting plate in upper module and lower module, and with open web connecting plate plug-in, the both ends of several reinforcing columns respectively with open web reinforcing plate abut, solve the problem that traditional PP water storage module overall compression resistance is low, load bearing range is small, difficult to meet the high-strength load bearing scene use demand.

Description

Technical Field

[0001] This utility model relates to the field of rainwater harvesting technology, specifically to an HDPE water storage module. Background Technology

[0002] The water storage modules are typically made of PP plastic. Several unit modules are spliced ​​and stacked to form an underground water storage space. The outside is wrapped with impermeable geotextile and backfilled with soil to form a water storage tank. A soil layer is then placed on top for planting greenery. The collected rainwater, after treatment, can be widely used for toilet flushing, road cleaning, green space irrigation, and water feature replenishment. It effectively alleviates urban water pressure and reduces the risk of urban flooding caused by rainfall, playing an irreplaceable role in modern urban stormwater management.

[0003] However, traditional PP water storage modules have significant structural design flaws that limit their application scenarios. Existing water storage modules mostly consist of an upper and lower module connected and supported by a raised structure. This simple connection method results in weak overall compressive strength and a narrow load-bearing range, making it difficult to meet the diverse pressure requirements of different scenarios. In practical applications, traditional modules are only suitable for low-load-bearing scenarios such as beneath green spaces, and cannot be deployed in areas requiring high-strength loads, such as roads and parking lots. Forcing vehicles to pass over them or placing heavy objects on them can easily lead to module breakage, water tank collapse, and other safety accidents, severely affecting system stability and service life.

[0004] Therefore, developing new water storage modules with high pressure resistance and strong adaptability to different scenarios has become an urgent need to break through current technical bottlenecks and promote the quality and efficiency of sponge city construction. Utility Model Content

[0005] Based on this, and in response to the above problems, this utility model proposes an HDPE water storage module, which solves the problems of low overall compressive strength and small load-bearing range of traditional PP water storage modules, making it difficult to meet the needs of high-strength load-bearing scenarios.

[0006] The technical solution of this utility model is:

[0007] An HDPE water storage module includes several water storage unit modules connected longitudinally and transversely and a side plate assembly disposed on the outside of the several water storage unit modules. The water storage unit module includes an upper module and a lower module arranged in a mirror image, and several reinforcing columns are detachably provided between the upper module and the lower module.

[0008] Both the upper and lower modules include a hollow connecting plate, a hollow reinforcing plate, and several fixed truncated cones. The hollow reinforcing plate is located on one side of the hollow connecting plate and is detachably connected to the hollow connecting plate. The hollow connecting plate has several mounting slots, which are evenly distributed on the hollow connecting plate. Several fixed truncated cones are installed in the mounting slots and are detachably connected to the mounting slots. One side of the hollow reinforcing plate abuts against one side of the fixed truncated cones to fix the fixed truncated cones in the mounting slots. The fixed truncated cones are hollow inside and have openings at both ends.

[0009] One end of several fixed truncated cones in the upper and lower modules are in contact with each other and the openings are connected. The two ends of several reinforcing columns pass through the hollow connecting plates in the upper and lower modules and are inserted into the hollow connecting plates. The two ends of several reinforcing columns abut against the hollow reinforcing plates.

[0010] Preferably, the reinforcing column includes a column body and plug-in rods fixedly disposed at both ends of the column body. The plug-in rods pass through the hollow connecting plate and are plugged into the hollow connecting plate. The end of the plug-in rod abuts against the hollow reinforcing plate, and the end of the column body abuts against the hollow connecting plate.

[0011] Preferably, the perforated reinforcing plate is provided with several abutment plates that cooperate with the plug-in rod. The abutment plates are fixedly connected to the perforated reinforcing plate, and the end of the plug-in rod abuts against the abutment plates.

[0012] Preferably, the lower module has a plug tube at one end of the fixed truncated cone. The plug tube is fixedly installed inside the opening and communicates with the inside of the fixed truncated cone. The plug tube on the fixed truncated cone in the lower module is plugged into the opening at one end of the fixed truncated cone in the upper module.

[0013] Preferably, the hollow reinforcing plate has a first dovetail block and a first dovetail groove adapted to the first dovetail block on both sides. The first dovetail block is fixedly connected to the hollow reinforcing plate, and the first dovetail block and the first dovetail groove are interference fit, which is used to splice other water storage unit modules in the horizontal direction.

[0014] Preferably, the other two sides of the hollowed-out reinforcing plate are respectively provided with a second dovetail block and a second dovetail groove adapted to the second dovetail block. The second dovetail block is fixedly connected to the hollowed-out reinforcing plate, and the second dovetail block and the second dovetail groove are interference fit, which is used to splice other water storage unit modules in the longitudinal direction.

[0015] Preferably, the side plate assembly includes a first side plate, a second side plate, a third side plate, and a fourth side plate. The first side plate, the second side plate, the third side plate, and the fourth side plate are respectively snapped into the hollow reinforcing plates in a plurality of water storage unit modules located on the outer side in the circumferential direction, and the first side plate, the second side plate, the third side plate, and the fourth side plate are fixedly connected by bolts.

[0016] Preferably, the first side plate is provided with a first mating groove that mates with the first dovetail block, the first dovetail block is engaged in the first mating groove and has an interference fit with the first mating groove; the second side plate is provided with a second mating groove that mates with the second dovetail block, the second dovetail block is engaged in the second mating groove and has an interference fit with the second mating groove; the third side plate is fixedly provided with a first mating dovetail block that mates with the first dovetail groove, the first mating dovetail block is engaged in the first dovetail groove and has an interference fit with the first dovetail groove; and the fourth side plate is fixedly provided with a second mating dovetail block that mates with the second dovetail groove, the second mating dovetail block is engaged in the second dovetail groove and has an interference fit with the second dovetail groove.

[0017] Preferably, the perforated reinforcing plate and the perforated connecting plate are detachably connected by bolts.

[0018] Preferably, both the water storage unit module and the side panel assembly are made of HDPE material.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention improves upon traditional water storage modules by adding several reinforcing columns. These columns penetrate the perforated connecting plates of the upper and lower modules at both ends and are fixed in place, forming longitudinal rigid support columns that directly bear vertical loads, such as those from top soil cover or vehicle traffic. This transfers force from the upper structure to the lower foundation, dispersing concentrated stress. Simultaneously, the outer side plate components further constrain the overall structure, preventing displacement or deformation of individual water storage modules under stress. This ensures even load distribution throughout the structure, improving shear and bending resistance. This design solves the problems of low overall compressive strength and limited load-bearing capacity of traditional PP water storage modules, making them unsuitable for high-strength load-bearing applications. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a structural schematic diagram of an HDPE water storage module as described in an embodiment of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the water storage unit module described in the embodiment of this utility model;

[0024] Figure 3This is a partial exploded structural diagram of an HDPE water storage module described in an embodiment of this utility model;

[0025] Figure 4 This is a partial structural schematic diagram of an HDPE water storage module described in an embodiment of this utility model;

[0026] Figure 5 This is a partial structural schematic diagram of the water storage unit module described in this embodiment of the utility model;

[0027] Explanation of reference numerals in the attached figures:

[0028] 10-Water storage unit module, 11-Side plate assembly, 12-Upper module, 13-Lower module, 14-Reinforcing column, 15-Hollowed connecting plate, 16-Hollowed reinforcing plate, 17-Fixed frustum, 18-Mounting groove, 19-Opening, 20-Column, 21-Plug-in rod, 22-Abutting plate, 23-Plug-in pipe, 24-First dovetail block, 25-First dovetail groove, 26-Second dovetail block, 27-Second dovetail groove, 28-First side plate, 29-Second side plate, 30-Third side plate, 31-Fourth side plate, 32-First mating groove, 33-Second mating groove, 34-First mating dovetail block, 35-Second mating dovetail block. Detailed Implementation

[0029] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", 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 the embodiments of 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 the embodiments of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this embodiment of the 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 embodiment of the invention according to the specific circumstances.

[0033] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0035] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0036] Example:

[0037] like Figures 1 to 5 As shown, this embodiment discloses an HDPE water storage module, including a plurality of water storage unit modules 10 connected in a longitudinal and transverse manner and a side plate assembly 11 disposed on the outside of the plurality of water storage unit modules 10. The water storage unit module 10 includes an upper module 12 and a lower module 13 arranged in a mirror image, and a plurality of reinforcing columns 14 are detachably provided between the upper module 12 and the lower module 13.

[0038] Both the upper module 12 and the lower module 13 include a hollow connecting plate 15, a hollow reinforcing plate 16, and several fixed truncated cones 17. The hollow reinforcing plate 16 is disposed on one side of the hollow connecting plate 15 and is detachably connected to the hollow connecting plate 15. The hollow connecting plate 15 is provided with several mounting grooves 18, which are evenly distributed on the hollow connecting plate 15. Several fixed truncated cones 17 are respectively installed in the several mounting grooves 18 and are detachably connected to the mounting grooves 18. One side of the hollow reinforcing plate 16 abuts against one side of the several fixed truncated cones 17 to fix the several fixed truncated cones 17 in the mounting grooves 18. The interior of the fixed truncated cones 17 is hollow, and both ends are provided with openings 19.

[0039] One end of several fixed frustums 17 in the upper module 12 and the lower module 13 are in contact with each other and the openings 19 are connected. The two ends of several reinforcing columns 14 pass through the hollow connecting plates 15 in the upper module 12 and the lower module 13 respectively and are inserted into the hollow connecting plates 15. The two ends of several reinforcing columns 14 abut against the hollow reinforcing plates 16 respectively.

[0040] This invention improves upon traditional water storage modules by adding several reinforcing columns 14. Each reinforcing column 14 has its ends inserted and fixed through the perforated connecting plates 15 of the upper module 12 and lower module 13, and its ends abut against the perforated reinforcing plates 16, forming a longitudinal rigid support column. This column directly bears vertical loads, such as those from top soil cover or vehicle traffic, transferring force from the upper structure to the lower foundation and dispersing concentrated stress. Simultaneously, the outer side plate assembly 11 further constrains the overall structure, preventing displacement or deformation of individual unit modules under stress, ensuring uniform load distribution throughout the structure, and improving shear and bending resistance. This solves the problems of low overall compressive strength and small load-bearing range in traditional PP water storage modules, making them unsuitable for high-strength load-bearing applications.

[0041] Among them, several fixed frustums 17 in the upper module 12 and the lower module 13 are in contact at one end to form several support nodes, which can further enhance their longitudinal compressive strength and load-bearing range.

[0042] In this invention, the reinforcing column 14, the hollow reinforcing plate 16, and the fixed frustum 17 are all detachably connected, significantly enhancing functional flexibility during use. For example, the number of reinforcing columns 14 can be adjusted according to actual load-bearing requirements; more reinforcing columns 14 can be added for high-strength scenarios, and fewer for lightweight scenarios. The fixed frustum 17 is detachable and replaceable; it can be directly replaced if worn or clogged, or its distribution density within the mounting groove 18 can be adjusted to accommodate different water storage requirements. Furthermore, during transportation, the reinforcing column 14, the hollow plate, and the fixed frustum 17 can be transported separately, reducing transportation space requirements. Simultaneously, the unit modules are easy to assemble on-site, allowing for rapid longitudinal and transverse splicing, significantly shortening the construction cycle and greatly improving construction efficiency.

[0043] In one embodiment, the hollowed-out reinforcing plate 16 and the hollowed-out connecting plate 15 are detachably connected by bolts.

[0044] In another embodiment, the hollowed-out reinforcing plate 16 and the hollowed-out connecting plate 15 can also be detachably connected by tenon and mortise joints.

[0045] To facilitate the distribution of force, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the reinforcing column 14 includes a column body 20 and plug-in rods 21 respectively fixed at both ends of the column body 20. The plug-in rods 21 pass through the hollow connecting plate 15 and are plugged into the hollow connecting plate 15. The end of the plug-in rod 21 abuts against the hollow reinforcing plate 16, and the end of the column body 20 abuts against the hollow connecting plate 15.

[0046] The hollow reinforcing plate 16 is provided with several abutment plates 22 that cooperate with the plug rod 21. The abutment plates 22 are fixedly connected to the hollow reinforcing plate 16, and the end of the plug rod 21 abuts against the abutment plates 22.

[0047] The reinforcing column 14 is configured as a column body 20 and a connecting rod 21. The end of the connecting rod 21 abuts against the perforated reinforcing plate 16, and the end of the column body 20 abuts against the perforated connecting plate 15. This effectively distributes the force to the perforated connecting plate 15 and the perforated reinforcing plate 16, thereby improving the longitudinal compressive strength and load-bearing capacity. The abutment plate 22 facilitates abutment with the end of the connecting rod 21.

[0048] To facilitate communication between the upper module 12 and the fixed frustum 17 in the lower module 13, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that one end of the fixed frustum 17 in the lower module 13 is provided with a plug tube 23. The plug tube 23 is fixedly installed in the opening 19 and communicates with the interior of the fixed frustum 17. The plug tube 23 on the fixed frustum 17 in the lower module 13 is plugged into the opening 19 at one end of the fixed frustum 17 in the upper module 12.

[0049] The insertion pipe 23 facilitates communication between the upper module 12 and the fixed frustum 17 in the lower module 13.

[0050] In one embodiment, both the upper module 12 and the lower module 13 have nine fixed frustums 17. One fixed frustum 17 is located in the middle of the upper module 12 and the lower module 13, and the remaining eight fixed frustums 17 are respectively arranged on both sides of the upper module 12 and the lower module 13. The fixed frustum 17 located in the middle of the upper module 12 and the lower module 13 is used for pouring concrete. The pouring of concrete can further improve the compressive strength.

[0051] To facilitate the longitudinal and transverse connection of several water storage unit modules 10, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the hollow reinforcing plate 16 is provided with a first dovetail block 24 and a first dovetail groove 25 adapted to the first dovetail block 24 on both sides. The first dovetail block 24 is fixedly connected to the hollow reinforcing plate 16, and the first dovetail block 24 and the first dovetail groove 25 are interference fit, which is used to splice other water storage unit modules 10 in the transverse direction.

[0052] The hollow reinforcing plate 16 has a second dovetail block 26 and a second dovetail groove 27 adapted to the second dovetail block 26 on its other two sides. The second dovetail block 26 is fixedly connected to the hollow reinforcing plate 16, and the second dovetail block 26 and the second dovetail groove 27 are interference fit, which is used to splice other water storage unit modules 10 in the longitudinal direction.

[0053] The arrangement of the first dovetail block 24, the first dovetail groove 25, the second dovetail block 26, and the second dovetail groove 27 facilitates the connection of several water storage unit modules 10 in both directions to form a water storage module.

[0054] To facilitate the installation and fixing of the side plates, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the side plate assembly 11 includes a first side plate 28, a second side plate 29, a third side plate 30 and a fourth side plate 31. The first side plate 28, the second side plate 29, the third side plate 30 and the fourth side plate 31 are respectively snapped into the hollow reinforcing plates 16 in a plurality of water storage unit modules 10 located on the outer side of the circumference, and the first side plate 28, the second side plate 29, the third side plate 30 and the fourth side plate 31 are fixedly connected by bolts.

[0055] The first side plate 28 is provided with a first mating groove 32 that mates with the first dovetail block 24. The first dovetail block 24 is engaged in the first mating groove 32 and has an interference fit with the first mating groove 32. The second side plate 29 is provided with a second mating groove 33 that mates with the second dovetail block 26. The second dovetail block 26 is engaged in the second mating groove 33 and has an interference fit with the second mating groove 33. The third side plate 30 is fixedly provided with a first mating dovetail block 34 that mates with the first dovetail groove 25. The first mating dovetail block 34 is engaged in the first dovetail groove 25 and has an interference fit with the first dovetail groove 25. The fourth side plate 31 is fixedly provided with a second mating dovetail block 35 that mates with the second dovetail groove 27. The second mating dovetail block 35 is engaged in the second dovetail groove 27 and has an interference fit with the second dovetail groove 27.

[0056] During installation, the first mating groove 32 facilitates engagement with the first dovetail block 24, thus facilitating the installation of the first side plate 28. The second mating groove 33 facilitates engagement with the second dovetail block 26, thus facilitating the installation of the second side plate 29. The first mating dovetail block 34 facilitates engagement with the first dovetail groove 25, thus facilitating the installation of the third side plate 30. The second mating dovetail block 35 facilitates engagement with the second dovetail groove 27, thus facilitating the installation of the fourth side plate 31. The interference fit enhances the overall structural stability. Furthermore, the bolted connection between the first side plate 28, second side plate 29, third side plate 30, and fourth side plate 31 improves the overall shear and bending resistance of the water storage module.

[0057] In order to further improve the compressive strength and load-bearing range of this utility model, this embodiment is improved on the basis of the above embodiment. The difference from the above embodiment is that the water storage unit module 10 and the side plate assembly 11 are both made of HDPE material.

[0058] This invention utilizes an optimized load-bearing structure, combined with the inherent high strength of HDPE material. HDPE exhibits superior tensile strength and impact resistance compared to PP, significantly enhancing overall compressive strength. This makes it suitable for high-intensity load-bearing scenarios such as vehicle crushing and heavy equipment placement, further improving the compressive strength and load-bearing range of this invention. Simultaneously, HDPE material offers better corrosion resistance, weather resistance, and aging resistance than PP. Furthermore, the detachable structure allows for individual replacement of damaged components, eliminating the need for complete module replacement, significantly extending module lifespan and reducing maintenance costs.

[0059] Working principle of this utility model:

[0060] This invention improves upon traditional water storage modules by adding several reinforcing columns 14. Each reinforcing column 14 has its ends inserted and fixed through the perforated connecting plates 15 of the upper module 12 and lower module 13, and its ends abut against the perforated reinforcing plates 16, forming longitudinal rigid support columns that directly bear vertical loads, such as those from top soil cover or vehicle traffic. This transfers force from the upper structure to the lower foundation, dispersing concentrated stress. Simultaneously, the outer side plate assemblies 11 further constrain the overall structure, preventing displacement or deformation of individual water storage unit modules 10 under stress. This ensures the load is evenly distributed throughout the structure, improving shear and bending resistance.

[0061] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An HDPE water storage module, characterized in that, It includes several water storage unit modules (10) that are connected in a longitudinal and transverse manner and side plate assemblies (11) arranged on the outside of several water storage unit modules (10). The water storage unit module (10) includes an upper module (12) and a lower module (13) arranged in a mirror image. Several reinforcing columns (14) are detachably provided between the upper module (12) and the lower module (13). Both the upper module (12) and the lower module (13) include a hollow connecting plate (15), a hollow reinforcing plate (16) and several fixed truncated cones (17). The hollow reinforcing plate (16) is set on one side of the hollow connecting plate (15) and is detachably connected to the hollow connecting plate (15). The hollow connecting plate (15) is provided with several mounting grooves (18). The several mounting grooves (18) are evenly distributed on the hollow connecting plate (15). Several fixed truncated cones (17) are respectively installed in the several mounting grooves (18) and are detachably connected to the mounting grooves (18). One side of the hollow reinforcing plate (16) abuts against one side of the several fixed truncated cones (17) to fix the several fixed truncated cones (17) in the mounting grooves (18). The interior of the fixed truncated cones (17) is hollow and both ends are provided with openings (19). One end of several fixed frustums (17) in the upper module (12) and the lower module (13) are in contact with each other and the openings (19) are connected. The two ends of several reinforcing columns (14) pass through the hollow connecting plates (15) in the upper module (12) and the lower module (13) respectively and are inserted into the hollow connecting plates (15). The two ends of several reinforcing columns (14) abut against the hollow reinforcing plates (16) respectively.

2. The HDPE water storage module according to claim 1, characterized in that, The reinforcing column (14) includes a column body (20) and plug rods (21) fixedly installed at both ends of the column body (20). The plug rods (21) pass through the hollow connecting plate (15) and are plugged into the hollow connecting plate (15). The end of the plug rods (21) abuts against the hollow reinforcing plate (16), and the end of the column body (20) abuts against the hollow connecting plate (15).

3. The HDPE water storage module according to claim 2, characterized in that, The hollow reinforcing plate (16) is provided with several abutment plates (22) that cooperate with the plug rod (21). The abutment plates (22) are fixedly connected to the hollow reinforcing plate (16), and the end of the plug rod (21) abuts against the abutment plates (22).

4. The HDPE water storage module according to claim 3, characterized in that, The lower module (13) has a plug tube (23) at one end of the fixed truncated cone (17). The plug tube (23) is fixedly installed in the opening (19) and communicates with the interior of the fixed truncated cone (17). The plug tube (23) on the fixed truncated cone (17) in the lower module (13) is plugged into the opening (19) at one end of the fixed truncated cone (17) in the upper module (12).

5. The HDPE water storage module according to claim 4, characterized in that, The hollow reinforcing plate (16) has a first dovetail block (24) and a first dovetail groove (25) adapted to the first dovetail block (24) on both sides respectively. The first dovetail block (24) is fixedly connected to the hollow reinforcing plate (16), and the first dovetail block (24) and the first dovetail groove (25) are interference fit, which is used to splice other water storage unit modules (10) in the horizontal direction.

6. The HDPE water storage module according to claim 5, characterized in that, The hollow reinforcing plate (16) has a second dovetail block (26) and a second dovetail groove (27) adapted to the second dovetail block (26) on its other two sides. The second dovetail block (26) is fixedly connected to the hollow reinforcing plate (16), and the second dovetail block (26) and the second dovetail groove (27) are interference fit, which is used to splice other water storage unit modules (10) in the longitudinal direction.

7. The HDPE water storage module according to claim 6, characterized in that, The side panel assembly (11) includes a first side panel (28), a second side panel (29), a third side panel (30), and a fourth side panel (31). The first side panel (28), the second side panel (29), the third side panel (30), and the fourth side panel (31) are respectively snapped into the hollow reinforcing plates (16) in a plurality of water storage unit modules (10) located on the outer side of the circumference, and the first side panel (28), the second side panel (29), the third side panel (30), and the fourth side panel (31) are fixedly connected by bolts.

8. The HDPE water storage module according to claim 7, characterized in that, The first side plate (28) is provided with a first mating groove (32) that mates with the first dovetail block (24). The first dovetail block (24) is engaged in the first mating groove (32) and has an interference fit with the first mating groove (32). The second side plate (29) is provided with a second mating groove (33) that mates with the second dovetail block (26). The second dovetail block (26) is engaged in the second mating groove (33) and has an interference fit with the second mating groove (33). The third side plate (3... The fourth side plate (31) is fixedly provided with a first mating dovetail block (34) that mates with the first dovetail groove (25). The first mating dovetail block (34) is snapped into the first dovetail groove (25) and has an interference fit with the first dovetail groove (25). The fourth side plate (31) is fixedly provided with a second mating dovetail block (35) that mates with the second dovetail groove (27). The second mating dovetail block (35) is snapped into the second dovetail groove (27) and has an interference fit with the second dovetail groove (27).

9. The HDPE water storage module according to claim 8, characterized in that, The hollowed-out reinforcing plate (16) and the hollowed-out connecting plate (15) are detachably connected by bolts.

10. The HDPE water storage module according to claim 9, characterized in that, Both the water storage unit module (10) and the side panel assembly (11) are made of HDPE material.

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