Sponge city siphon drainage plate

Abstract

The utility model discloses a kind of sponge city siphon drainage plate, including bottom base layer, drainage groove, support assembly, filter layer and siphon component. Its innovation is in: filter layer is three-dimensional and is divided into the first filter layer being laid in the top of support top plate frame, the second filter layer being contained in the upper frame of support assembly and the third filter layer being filled below support assembly and located outside drainage groove, so that rainwater needs to flow through a section of folded filter path;Siphon component includes main, vice siphon drainage pipe, is communicated with drainage groove respectively and is equipped with one-way valve guarantee efficient drainage. The utility model effectively intercepts impurity to prevent clogging by three-dimensional staggered multistage filtration system, combined with double siphon drainage mechanism, realizes the efficient purification and rapid discharge of rainwater, significantly improves the ability of sponge city to deal with rainstorm waterlogging.

Description

Technical Field

[0001] This utility model relates to the field of urban drainage technology, specifically to a sponge city siphon drainage board. Background Technology

[0002] In the construction of sponge cities, siphon drainage systems are used to quickly remove rainwater that has infiltrated the ground. Among related technologies, CN217419873U discloses a rainwater harvesting siphon drainage system, which includes basic components such as a drainage channel, a siphon pipe, and a vent pipe, forming a siphon drainage path. Its main focus is on solving the problem of tight connection between the drainage board and the drainage channel.

[0003] However, the aforementioned existing technologies still have significant drawbacks: their filtration systems are too rudimentary. Specifically, the system relies on only one layer of geotextile to filter impurities in infiltrating rainwater. Practice has shown that when faced with complex fine particles in the soil (such as silt and clay), the pores of a single layer of geotextile are easily and quickly clogged, leading to a sharp decline in permeability. This clogging prevents rainwater from flowing sufficiently and quickly into the drainage channel below, thus failing to meet the water volume and flow velocity conditions required to activate the siphon effect. Consequently, the entire siphon system fails at critical moments, ultimately degenerating into inefficient gravity drainage, which is ineffective in addressing urban flooding.

[0004] Therefore, designing a solution that can fundamentally solve the problem of filter clogging and thus ensure the long-term, stable, and efficient operation of the siphon system is a technical challenge that urgently needs to be overcome in this field. Utility Model Content

[0005] To address the problem that existing technologies are easily clogged by fine soil particles, resulting in insufficient water entering the siphon system, which greatly reduces or even completely disables the siphon effect and prevents long-term reliable and rapid drainage, this invention provides a siphon drainage board for sponge cities.

[0006] The siphonic drainage board for sponge cities provided in this application adopts the following technical solution: A sponge city siphon drainage board includes: a bottom foundation layer; a drainage trough laid on top of the bottom foundation layer, the drainage trough having an inlet on its side wall, and a filter element disposed within the inlet; a support assembly including a support frame structure and a support top frame, the support frame structure being disposed above the drainage trough; the support top frame being disposed on top of the support frame structure; a filter layer including a first filter layer, a second filter layer, and a third filter layer, the first filter layer being laid on top of the support top frame; the second filter layer being disposed between the support frame structure and the support top frame; the third filter layer being disposed below the support frame structure and outside the drainage trough; and a siphon assembly including a siphon drainage pipe assembly and an exhaust pipe, the siphon drainage pipe assembly being connected to one end of the drainage trough; and the exhaust pipe being disposed on top of the drainage trough.

[0007] By adopting the above technical solution, the bottom foundation layer, drainage channel, multi-layer filtration structure, and siphon components are organically integrated into a complete whole. Through this design, this application constructs a comprehensive sponge city drainage solution that integrates three major functions: multi-stage filtration and purification, orderly water storage, and rapid siphon discharge, achieving efficient management and utilization of rainwater resources.

[0008] Optionally, the first filter layer is a fine gravel layer, the second filter layer is a medium sand layer, and the third filter layer is a permeable concrete base layer.

[0009] By adopting the above technical solution, specific materials were specified for the three filter layers—fine crushed stone, medium sand, and permeable concrete. This design constructs a progressive filtration system that moves from coarse to fine filtration to structural filtration. The first layer intercepts large particles of impurities, the second layer performs fine filtration, and the third layer provides structural support while allowing final permeation, thus achieving a highly efficient, tiered, and non-clogging purification effect.

[0010] Optionally, the fine gravel particle size of the first filter layer is 5-10 mm, the medium sand particle size of the second filter layer is 0.5-2 mm, and the porosity of the third filter layer is 15%-20%.

[0011] By adopting the above technical solution, the key physical parameters of the filter material were further numerically limited, namely the particle size range of fine gravel and medium sand, and the porosity of permeable concrete. This design ensures that each filter layer can not only effectively intercept pollutants of the corresponding size but also maintain the optimal permeability rate, achieving a precise balance between filtration accuracy and drainage efficiency, thus optimizing the overall purification performance.

[0012] Optionally, the filter element includes a filter screen and a filter support screen, wherein the filter support screen is disposed on both sides of the filter screen structure and welded and fixed to the filter screen.

[0013] By adopting the above technical solution, a reinforced filter element consisting of a filter screen and a filter support screen was designed for the inlet of the drainage trough. This design effectively prevents larger impurities from directly entering the drainage trough and siphon system, thus preventing clogging of the core components. Furthermore, the support screen enhances the structural strength of the filter screen, enabling it to withstand water flow impact and debris compression without easily being damaged, ensuring long-term operational reliability.

[0014] Optionally, the supporting top plate frame is provided with a first support mesh for supporting the first filter layer; the supporting plate frame structure is provided with a second support mesh for supporting the second filter layer.

[0015] By adopting the above technical solution, first and second support nets are added inside the support structure. This design provides a stable and reliable support platform for the two loose media, the first filter layer (fine gravel) and the second filter layer (medium sand), preventing the loss or sinking of filter materials and ensuring that the filter layers maintain the designed thickness and uniformity during long-term use, thereby maintaining a stable filtration effect.

[0016] Optionally, a polymer protective drainage self-adhesive geotextile and a waterproof membrane layer are provided between the bottom foundation layer and the drainage ditch, with the polymer protective drainage self-adhesive geotextile positioned above the waterproof membrane layer.

[0017] By adopting the above technical solution, a dual protective structure of a waterproof membrane layer and a polymer protective drainage self-adhesive geotextile is added to the bottom of the equipment. This design ensures that the waterproof membrane layer achieves complete seepage prevention, preventing purified water or water that cannot be drained in time from seeping into and damaging the building foundation; while the polymer protective drainage self-adhesive geotextile above it effectively prevents the waterproof membrane from being punctured by the structure above, forming a double insurance of protection and waterproofing, greatly improving the safety and durability of the system.

[0018] Optionally, support bases are evenly provided in the gaps between the drainage channels, and the top of the support bases abuts against the middle of the support plate frame structure.

[0019] By adopting the above technical solution, support bases are installed in the gaps between the drainage channels to support the upper support frame structure. This design evenly transfers the enormous weight of the upper filter layer and support structure to the more stable bottom foundation layer, effectively preventing the support frame structure from bending, sinking, or deforming due to long-term load-bearing, thus ensuring the structural stability and service life of the entire drainage board system.

[0020] Optionally, the siphon drainage pipe assembly includes a main siphon drainage pipe and a secondary siphon drainage pipe, and both the main siphon drainage pipe and the secondary siphon drainage pipe are equipped with a one-way valve structure.

[0021] By adopting the above technical solution, one-way valves are installed on both the main and auxiliary siphon drainage pipes. This design effectively prevents external air or discharged water from flowing back into the siphon pipes when the drainage system stops working. This is crucial for quickly and stably establishing and maintaining negative pressure (siphon effect) within the pipes, ensuring the success rate of siphon startup and the continuity of the drainage process.

[0022] Optionally, the main siphon drain pipe is connected to the end of the drain trough, and the secondary siphon drain pipe is connected to the side wall of the drain trough.

[0023] By adopting the above technical solution, the main and auxiliary siphon drainage pipes are connected to the ends and side walls of the drainage trough, respectively. This design allows multiple pipes to simultaneously receive water, filling the pipes more quickly and expelling air, thereby rapidly triggering a powerful siphon effect and enabling a rapid response to high-flow-rate situations such as heavy rain.

[0024] Optionally, the support frame structure includes a first support frame and a second support frame connected longitudinally and transversely, with a first receiving cavity formed between adjacent second support frames for accommodating the second filter layer; a plurality of drainage channels are arranged side by side at intervals to form a second receiving cavity for accommodating the third filter layer; wherein, the top of the drainage channel abuts below the middle of the first receiving cavity, and the second support frame is located above the middle of the second receiving cavity.

[0025] By adopting the above technical solution, the second and third filter layers are designed in a staggered arrangement. With this design, the water flow must first enter the second filter layer inside the upper frame, then flow out of the frame and into the third filter layer in the outer space of the lower frame. This folded filtration path significantly increases the contact time and area between the water and the filter material, thus achieving a more thorough purification effect compared to simple vertical stacking.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up three-dimensional staggered first, second and third filter layers, a folded filter path is constructed, which prolongs the contact time between water flow and filter media, realizes gradient filtration from coarse to fine, effectively prevents system blockage, and ensures the hydraulic conditions required for siphon start-up; 2. By setting up main and auxiliary siphon drainage pipes and one-way valves, a dual siphon drainage mechanism is formed, which improves the system's peak drainage capacity under extreme weather conditions such as rainstorms, and can prevent backflow of water, ensuring the stability and reliability of drainage. 3. The overall structural design is ingenious, integrating functional components such as the filter layer and drainage channel into one unit through support components. The structure is stable, has a strong load-bearing capacity, and improves the service life and reliability of the entire drainage system. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a siphon drainage board for sponge cities.

[0028] Figure 2 This is a side view schematic diagram of a siphon drainage board for sponge cities.

[0029] Figure 3 This is a partial structural diagram of a siphonic drainage board for sponge cities.

[0030] Figure 4 yes Figure 3 An enlarged schematic diagram of the structure at point A in the middle.

[0031] Explanation of reference numerals in the attached drawings: 1. Bottom foundation layer; 2. Drainage trough; 3. Inlet; 4. Filter element; 41. Filter screen; 42. Filter support screen; 5. Support assembly; 51. Support frame structure; 511. First support frame; 512. Second support frame; 52. Support top plate frame; 6. Filter layer; 61. First filter layer; 62. Second filter layer; 63. Third filter layer; 7. Siphon assembly; 71. Siphon drainage pipe assembly; 711. Main siphon drainage pipe; 712. Secondary siphon drainage pipe; 72. Exhaust pipe; 8. First support net; 9. Second support net; 10. Polymer protective drainage self-adhesive geotextile; 11. Waterproof membrane layer; 12. Support base; 13. One-way valve structure; 14. First receiving cavity; 15. Second receiving cavity; 16. Subgrade layer. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0033] Reference Figure 1 and Figure 2 This application provides a siphon drainage board for sponge cities. The siphon drainage board includes a bottom base layer 1, a drainage trough 2 laid on top of the bottom base layer 1, a support component 5 disposed above the drainage trough 2, and a filter layer 6. It also integrates a siphon component 7 to achieve active and rapid drainage.

[0034] In this embodiment, the bottom foundation layer 1 is a 100mm thick C20 concrete layer. Optionally, the bottom foundation layer 1 can also be a compacted soil layer or a building slab, serving as a stable load-bearing foundation. Multiple parallel and spaced drainage channels 2 are laid on top of the bottom foundation layer 1. Each drainage channel 2 has an inlet 3 on its side wall. Rainwater, after being filtered and purified by the upper structure, flows into the drainage channel 2 through this inlet 3 for collection. To prevent fine particles or impurities from the filter layer 6 from entering the drainage channel 2 and causing blockage, a filter element 4 is installed inside each inlet 3.

[0035] Optionally, the support assembly 5 consists of a support frame structure 51 and a top support frame 52 disposed on top of it. Preferably, the support frame structure 51 is made of galvanized angle steel and is fixed to the periphery of the drainage trough 2 by expansion bolts (not shown in the figure). The expansion bolts are sealed with adhesive to prevent leakage, thereby forming a sturdy frame spanning above the drainage trough 2. The top support frame 52 is fixed to the top of the support frame structure 51, providing a support platform for the filter layer 6 above.

[0036] In this embodiment, the filter layer 6 is designed as a three-dimensional, staggered three-layer structure, comprising a first filter layer 61, a second filter layer 62, and a third filter layer 63. The first filter layer 61 is laid directly on top of the supporting top plate frame 52, serving as the first filtration layer for rainwater contact. The second filter layer 62 is positioned between the supporting plate frame structure 51 and the supporting top plate frame 52, essentially contained within the upper space enclosed by the supporting components 5. The third filter layer 63 is positioned below the supporting plate frame structure 51 and fills the space between adjacent drainage channels 2, i.e., located on the outside of the drainage channels 2. This layout ensures that rainwater must first pass through the first filter layer 61, then seep into the second filter layer 62 inside the supporting plate frame structure 51 for secondary filtration. After filtration, the water flows through the gaps in the supporting frame, exits, and enters the third filter layer 63 below the outside of the supporting frame for final filtration, finally entering the drainage channel 2 through the inlet 3 on the side wall of the drainage channel 2. Finally, a base soil layer 16 is laid on top of the first filter layer 61. Preferably, the base soil layer 16 is planting soil with a compaction coefficient ≥0.93, which is used for planting green vegetation.

[0037] To achieve better filtration, in this embodiment, the filter layer 6 and the support frame structure 51 form an interlaced filtration structure. Specifically, the support frame structure 51 can be welded together from a first support frame 511 and a second support frame 512 connected longitudinally and transversely. A first receiving cavity 14 for accommodating the second filter layer 62 is formed between adjacent second support frames 512. Simultaneously, the space between multiple parallel and spaced drainage channels 2 forms a second receiving cavity 15 for accommodating the third filter layer 63. The top of the drainage channel 2 abuts against the lower center of the first receiving cavity 14, while the second support frame 512 is located above the center of the second receiving cavity 15. This arrangement creates an interlaced arrangement of the second filter layer 62 and the third filter layer 63 in three-dimensional space, forcing the water flow through a folded path, greatly extending the filtration time and improving the purification effect.

[0038] In this embodiment, to achieve efficient tiered filtration, the first filter layer 61 is a fine gravel layer, the second filter layer 62 is a medium sand layer, and the third filter layer 63 is a permeable concrete base layer. Furthermore, to achieve the optimal balance between filtration precision and permeability, the fine gravel particle size of the first filter layer 61 is preferably 5-10 mm, with a porosity of 25%-30%, and a thickness of 50-80 mm, used to intercept larger debris such as leaves and paper scraps; the medium sand particle size of the second filter layer 62 is preferably 0.5-2 mm, with a mud content not exceeding 3%, and a thickness of 30-50 mm, used to filter suspended solids and fine particles in the water; the porosity of the third filter layer 63 is preferably 15%-20%, and the permeable concrete base layer is of strength grade C15, providing stable structural support while ensuring excellent final permeability performance.

[0039] To effectively support the loose filter material and maintain its designed thickness and shape, a first support mesh 8 for supporting the first filter layer 61 is provided inside the supporting top plate frame 52; a second support mesh 9 for supporting the second filter layer 62 is provided in the middle of the interior of the supporting plate frame structure 51. Preferably, the first support mesh 8 is made of galvanized steel wire with a mesh size of 5-8mm, and the second support mesh 9 is made of galvanized steel wire with a mesh size of 1-2mm, and both are welded and fixed to the supporting plate frame structure 51.

[0040] Optionally, the siphon assembly 7 includes a siphon drainage pipe group 71 connected to one end of the drainage trough 2, and an exhaust pipe 72 installed at the top of the drainage trough 2 to facilitate the formation of a siphon. When the water level in the drainage trough 2 rises to a predetermined height, the water flow fills the siphon drainage pipe group 71, and under the action of gravity, the internal air is discharged, forming a siphon effect, thereby rapidly pumping away the water accumulated in the trough. Specifically, the siphon drainage pipe group 71 consists of one main siphon drainage pipe 711 and two auxiliary siphon drainage pipes 712. The two auxiliary siphon drainage pipes 712 are symmetrically arranged on both sides of the main siphon drainage pipe 711, and the main siphon drainage pipe 711 is set at a higher height than the auxiliary siphon drainage pipes 712 on both sides. The exhaust pipe 72 is vertically installed at the top of the end of the drainage trough 2 away from the siphon assembly 7. Preferably, the height of the exhaust pipe 72 exceeds the top surface of the final foundation soil layer 16 by 50-100mm, and is used to discharge the air in the drainage trough 2 before the siphon is formed, and to replenish the air when the system stops working, thereby breaking the siphon.

[0041] To ensure the reliability of siphon activation, a one-way valve structure 13 is provided on both the main siphon drainage pipe 711 and the auxiliary siphon drainage pipe 712. The check pressure of the one-way valve structure 13 is preferably no greater than 0.02 MPa. This one-way valve effectively prevents external air from flowing back into the pipe before or after siphon formation, thus helping to form negative pressure more quickly. To enable emergency response to sudden increases in rainfall, the main siphon drainage pipe 711 is connected to the end of the drainage trough 2, while the auxiliary siphon drainage pipe 712 is connected to the side wall of the drainage trough 2. Even in the event of heavy rain and a rapid rise in water level, the auxiliary siphon drainage pipe 712, working together with the main siphon drainage pipe 711, can still provide strong instantaneous drainage capacity.

[0042] Reference Figure 1 and Figure 4 To ensure absolute waterproofing at the bottom and protect the building foundation, in this embodiment, a polymer protective drainage self-adhesive geotextile 10 and a waterproof membrane layer 11 are added between the bottom foundation layer 1 and the drainage channel 2. The waterproof membrane layer 11 is preferably an HDPE waterproof membrane, with the membranes forming a continuous, impermeable barrier through hot air welding (100mm overlap), completely preventing water seepage. The waterproof membrane layer 11 is laid at the bottom, and the polymer protective drainage self-adhesive geotextile 10 is then laid on top of it, secured by its self-adhesive layer (80mm overlap). The waterproof membrane layer 11 provides the core waterproofing function, while the polymer protective drainage self-adhesive geotextile 10 above it effectively prevents it from being punctured by the drainage channel 2 or building debris, thus providing protection.

[0043] Reference Figure 1 and Figure 3To further enhance the stability and load-bearing capacity of the overall structure, multiple support bases 12 can be evenly arranged in the gaps between adjacent drainage channels 2. Preferably, the spacing between the support bases 12 is 500mm. The tops of these support bases 12 are roughly flush with the top surface of the drainage channel 2, providing a stable support point for the upper support structure. The tops of the support bases 12 abut against the lower middle part of the upper support frame structure 51, stably transferring the weight of the upper filter layer 6 and support assembly 5 to the bottom foundation layer 1, preventing the support frame structure 51 from deforming under long-term load.

[0044] Reference Figure 3 and Figure 4 Specifically, the filter element 4 installed inside the water inlet 3 on the side wall of the drainage trough 2 includes a filter screen 41 and a filter support screen 42. Preferably, the filter screen 41 is a 304 stainless steel filter mesh with a mesh diameter greater than 300 meshes, and the filter support screen 42 is a galvanized iron wire support mesh with a mesh size of 10-15mm. The filter support screen 42 can be installed on both sides of the filter screen 41 and fixed to the filter screen 41 by welding or other methods to form a double-layered reinforced structure. The filter screen 41 is used to block particles, while the filter support screen 42 provides structural strength to the filter screen 41, preventing it from being damaged or deformed under the impact of water flow.

[0045] The implementation principle of a sponge city siphon drainage board in this application embodiment is as follows: During rainfall, rainwater first infiltrates into the base soil layer 16, and then passes through the first filter layer 61 and the second filter layer 62 in sequence, where most soil particles are intercepted. The water continues to flow downward, passing through the gap between the second support net 9 and the support frame structure 51, and enters the space formed by the third filter layer 63, where residual impurities are further intercepted. The filtered clean water flows evenly into the inlet 3 of the drainage trough 2 through the third filter layer 63, and enters the drainage trough 2 after final filtration by the filter element 4. As the water level in the drainage trough 2 rises, the air in the drainage trough 2 is discharged through the exhaust pipe 72. When the water level reaches the siphon activation condition, the siphon drainage pipe group 71 starts to work, using the siphon negative pressure to discharge the water accumulated in the drainage trough 2 at high speed. Under heavy rain conditions, the main siphon drainage pipe 711 and the auxiliary siphon drainage pipe 712 can drain water simultaneously, greatly improving drainage efficiency. After the rainfall ends, the water level in the drainage trough 2 drops, the siphon effect disappears, and gravity drainage resumes.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A siphonic drainage board for sponge cities, characterized in that, include: Bottom base layer (1); Drainage trough (2), the drainage trough (2) is laid on the top of the bottom foundation layer (1), the side wall of the drainage trough (2) is provided with water inlet (3), and a filter element (4) is provided in the water inlet (3); The support assembly (5) includes a support plate frame structure (51) and a support top plate frame (52), wherein the support plate frame structure (51) is disposed above the drainage trough (2); and the support top plate frame (52) is disposed on top of the support plate frame structure (51). The filter layer (6) includes a first filter layer (61), a second filter layer (62), and a third filter layer (63). The first filter layer (61) is laid on top of the supporting top plate frame (52); the second filter layer (62) is disposed between the supporting plate frame structure (51) and the supporting top plate frame (52); and the third filter layer (63) is disposed below the supporting plate frame structure (51) and located outside the drainage trough (2). The siphon assembly (7) includes a siphon drain pipe assembly (71) and an exhaust pipe (72), wherein the siphon drain pipe assembly (71) is connected to one end of the drain trough (2); and the exhaust pipe (72) is disposed at the top of the drain trough (2).

2. The sponge city siphon drainage board according to claim 1, characterized in that, The first filter layer (61) is a fine gravel layer, the second filter layer (62) is a medium sand layer, and the third filter layer (63) is a permeable concrete base layer.

3. The sponge city siphon drainage board according to claim 2, characterized in that, The first filter layer (61) has a fine gravel particle size of 5-10 mm, the second filter layer (62) has a medium sand particle size of 0.5-2 mm, and the third filter layer (63) has a porosity of 15%-20%.

4. The sponge city siphon drainage board according to claim 1, characterized in that, The filter element (4) includes a filter screen (41) and a filter support screen (42). The filter support screen (42) is disposed on both sides of the filter screen (41) structure and welded and fixed to the filter screen (41).

5. The sponge city siphon drainage board according to claim 1, characterized in that, The supporting top plate frame (52) is provided with a first support net (8) for supporting the first filter layer (61); the supporting plate frame structure (51) is provided with a second support net (9) for supporting the second filter layer (62).

6. The sponge city siphon drainage board according to claim 1, characterized in that, A polymer protective drainage self-adhesive geotextile (10) and a water-proof membrane layer (11) are provided between the bottom foundation layer (1) and the drainage ditch (2), with the polymer protective drainage self-adhesive geotextile (10) located above the water-proof membrane layer (11).

7. The sponge city siphon drainage board according to claim 1, characterized in that, Support bases (12) are evenly provided in the gaps between the drainage channels (2), and the top of the support bases (12) abuts against the middle of the support plate frame structure (51).

8. The sponge city siphon drainage board according to claim 1, characterized in that, The siphon drainage pipe assembly (71) includes a main siphon drainage pipe (711) and a secondary siphon drainage pipe (712), and both the main siphon drainage pipe (711) and the secondary siphon drainage pipe (712) are equipped with a one-way valve structure (13).

9. The sponge city siphon drainage board according to claim 8, characterized in that, The main siphon drain pipe (711) is connected to the end of the drain trough (2), and the secondary siphon drain pipe (712) is connected to the side wall of the drain trough (2).

10. The sponge city siphon drainage board according to claim 1, characterized in that, The support frame structure (51) includes a first support frame (511) and a second support frame (512) connected longitudinally and transversely. A first receiving cavity (14) for accommodating the second filter layer (62) is formed between adjacent second support frames (512). A plurality of drainage channels (2) are arranged side by side at intervals to form a second receiving cavity (15) for accommodating the third filter layer (63). The top of the drainage channel (2) abuts against the lower part of the middle of the first receiving cavity (14), and the second support frame (512) is located above the middle of the second receiving cavity (15).

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