Rainwater diversion and drainage structure for municipal road green belt

Abstract

The utility model relates to the technical field of municipal road drainage, and particularly discloses a rainwater diversion and drainage structure for a municipal road green belt. The collecting module is located in a soil layer below a green belt and used for collecting rainwater, the flow guiding module is used for guiding the rainwater collected by the collecting module, the drainage module is used for draining the rainwater guided by the flow guiding module to an urban rainwater pipe network or a nearby natural water body, and the collecting module is provided with a water inlet formed in the side, close to a road, of the green belt; the water inlet is located below the top face of the municipal road, the flow guide module is provided with a flow guide pipeline obliquely arranged on a soil layer below the green belt, and the upper end of the flow guide pipeline communicates with the bottom of the water inlet and used for guiding rainwater to the drainage module. The water outlet is communicated with a rainwater pipe network or a natural water body; the water inlet, the flow guide pipeline and the water outlet which are reasonably arranged can achieve efficient flow guide and drainage of rainwater in the flow guide and drainage structure.

Description

Technical Field

[0001] This utility model relates to the field of municipal road drainage technology, and in particular discloses a rainwater diversion and discharge structure for municipal road green belts. Background Technology

[0002] With the acceleration of urbanization, the scale of municipal road construction is constantly expanding. However, existing road stormwater drainage systems have many problems during rainfall. On the one hand, traditional stormwater drainage methods are often inefficient in collecting and diverting rainwater from roads, leading to rainwater accumulation on roads, causing traffic congestion and safety hazards, and also damaging vegetation in green belts. On the other hand, direct discharge of rainwater without effective treatment will have adverse effects on urban stormwater pipe networks and surrounding natural water environments, such as the potential cross-contamination of debris, silt, and organisms in the water, disrupting the ecological balance. Therefore, a new stormwater diversion and drainage structure for municipal road green belts is needed to solve these problems. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a rainwater diversion and discharge structure for green belts along municipal roads.

[0004] To achieve the above objectives, this utility model provides a rainwater diversion and discharge structure for municipal road green belts, comprising a collection module located in the soil layer below the green belt for collecting rainwater, a diversion module for guiding the rainwater collected by the collection module, and a drainage module for discharging the rainwater guided by the diversion module to the urban rainwater pipe network or nearby natural water bodies. The collection module has an inlet located on the side of the green belt near the road, below the top surface of the municipal road. The diversion module has a diversion pipe inclinedly installed in the soil layer below the green belt, with the upper end of the diversion pipe connected to the bottom of the inlet for guiding rainwater to the drainage module. The drainage module has an outlet connected to the lower end of the diversion pipe, which is connected to the rainwater pipe network or a natural water body.

[0005] Because the inlet is located below the top surface of the municipal road, it naturally guides rainwater from the road into the collection module. This topographical design requires no additional power, effectively collecting road runoff, reducing the possibility of road flooding, and ensuring normal traffic flow and pedestrian safety. The inlet is positioned on the side of the green belt close to the road, allowing for precise collection of rainwater from the road, avoiding the collection of water from unnecessary areas, improving collection efficiency and targeted utilization of rainwater resources. The diversion pipe is inclined and installed in the soil layer below the green belt, with its upper end connected to the bottom of the inlet. This structure allows rainwater to flow steadily from the collection module to the drainage module under gravity. The inclined design ensures the directionality of rainwater flow, preventing disorderly diffusion or accumulation of rainwater in the soil layer below the green belt. Stable diversion prevents excessive rainwater accumulation in the green belt, avoiding potential waterlogging damage to the roots of the vegetation and promoting healthy plant growth. The outlet of the drainage module is connected to the lower end of the diversion pipe, and the outlet is also connected to the rainwater pipe network or natural water body, forming a complete drainage path. This ensures that the collected and diverted rainwater is discharged in a timely manner, preventing rainwater from stagnating in the drainage structure and ensuring the smooth operation of the entire drainage system.

[0006] Furthermore, the collection module has a diversion channel set on the side of the road near the green belt. The diversion channel is distributed around the outer perimeter of the green belt. The diversion channel is connected to the water inlet to guide the rainwater on the road to the water inlet. The side wall of the water inlet is provided with an arc-shaped part, which forms a funnel structure.

[0007] A drainage channel is installed on the side of the road closest to the green belt and distributed around the outer perimeter of the green belt, greatly expanding the rainwater collection range. It effectively intercepts rainwater flowing from different locations on the road, allowing more rainwater to be channeled into the collection module, rather than being limited to a localized area near the inlet, thus improving the overall efficiency of the rainwater collection system. The inlet's sidewall is designed with an arc-shaped section, forming a funnel structure. This design further accelerates the speed at which rainwater enters the collection module. When rainwater flows through the drainage channel to the inlet, the funnel structure gathers and accelerates the rainwater, acting like a natural diverter, allowing the rainwater to flow into the collection module more quickly and smoothly, avoiding any stagnation or accumulation at the inlet. The funnel structure can also adapt to rainwater inflow at different angles and flow rates. Even with slight deviations in the inflow angle or larger flow rates, the arc-shaped sidewall effectively guides and buffers the water, ensuring a stable flow of rainwater into the collection module and enhancing the module's adaptability to different rainfall conditions.

[0008] Furthermore, the collection module has a rainwater collection pool connected between the inlet and the diversion pipe. A first connecting pipe connects the rainwater collection pool and the inlet. The diameter of the first connecting pipe from the inlet to the rainwater collection pool decreases in a funnel shape.

[0009] The rainwater harvesting tank provides a dedicated space for collecting and storing rainwater. Located between the inlet and the diversion pipe, it intercepts and temporarily stores rainwater flowing in from the inlet, preventing it from being directly and quickly discharged through the diversion pipe, thus better retaining rainwater resources during rainfall. Once rainwater enters the harvesting tank, the flow rate slows down, allowing more time and conditions for sediment, sediment, leaves, and other impurities carried in the water to settle. The first connecting pipe from the inlet to the rainwater harvesting tank has a funnel-shaped structure with a diameter decreasing from large to small. This design facilitates smoother flow of rainwater from the inlet into the harvesting tank. The larger diameter end connects to the inlet, quickly accommodating large amounts of rainwater flowing in, acting like a wide-mouthed container, reducing the risk of rainwater accumulation and blockage at the inlet. The gradually decreasing diameter compresses and guides the rainwater, allowing it to enter the harvesting tank at a more suitable flow rate and state, preventing excessive impact due to high flow velocity, further improving the efficiency of rainwater collection and diversion.

[0010] Furthermore, a first grille is provided at the upper part of the inlet, and the first grille has a mesh-like distribution of first rainwater sieve holes for intercepting debris; a second grille is provided at the outlet, and the second grille has a mesh-like distribution of second rainwater sieve holes for intercepting debris and organisms in the rainwater pipe network or natural water body, and the aperture of the second rainwater sieve holes is smaller than that of the first rainwater sieve holes.

[0011] A first grille is installed above the inlet, with a mesh-like distribution of first rainwater sieve holes. This allows for the interception of debris carried in the rainwater during its initial entry into the collection module. Common road debris such as leaves, branches, and plastic waste is blocked by the first grille, preventing it from entering the rainwater collection tank, diversion pipes, and other downstream components. A second grille and its second rainwater sieve holes are installed at the outlet. These not only intercept debris that may be present in the rainwater network or natural water bodies from entering the drainage module, but also prevent rainwater from carrying organisms into the rainwater network or natural water bodies during discharge. The inlet primarily handles rainwater flowing in from roads, which typically contains relatively large debris. The outlet, on the other hand, is designed to prevent debris from entering the rainwater pipe network or natural water bodies, as well as the outflow of organisms. These potentially smaller debris and organisms, such as silt and small aquatic organisms, require a second rainwater screen with smaller pore sizes to achieve finer filtration. This ensures that only fully filtered rainwater can enter and exit the drainage module, further improving the filtration effect and ecological protection function of the entire rainwater diversion and discharge structure.

[0012] Furthermore, the bottom of the rainwater collection tank is provided with a barrel-shaped coarse sand layer, inside which is a barrel-shaped fine sand layer. The fine sand layer is covered by the coarse sand layer. Inside the fine sand layer is a cylindrical activated carbon layer, above which is covered by the fine sand layer. A conical guide plate is provided above the activated carbon layer. The guide plate covers the activated carbon layer to guide the incoming rainwater to the bottom of the rainwater collection tank.

[0013] The rainwater harvesting tank is equipped with a multi-layered filtration system consisting of a coarse sand layer, a fine sand layer, and an activated carbon layer at the bottom. The coarse sand layer, shaped like a barrel, initially intercepts larger particles of impurities in the rainwater, such as silt and small stones, acting as the first line of defense and reducing the burden on subsequent filtration layers. The fine sand layer, also barrel-shaped and located inside and covering the coarse sand layer, contains even finer particles, further filtering out smaller particles that remain after passing through the coarse sand layer, thus further improving the purity of the rainwater. The activated carbon layer, cylindrical and located inside and covering the fine sand layer, has a strong adsorption capacity, capable of adsorbing organic matter, odors, and some heavy metal ions from the rainwater, deeply purifying it. This results in higher-quality rainwater discharge, which is more beneficial to protecting the ecological environment of the discharge area, such as urban stormwater drainage networks or natural water bodies. The conical guide plate located above the activated carbon layer and covering it serves to guide rainwater into the rainwater collection tank more smoothly to the bottom. When rainwater falls into the tank, the guide plate directs it evenly along its conical surface to the bottom, preventing direct impact on the activated carbon layer or localized water accumulation. This ensures sufficient contact between the rainwater and each filter layer, improving filtration efficiency.

[0014] Furthermore, the coarse sand layer, fine sand layer, and activated carbon layer are all in contact with the bottom of the rainwater collection tank. The upper part of the fine sand layer protrudes outward along a direction perpendicular to the central axis of the fine sand layer to form a first annular part, so as to cover the coarse sand layer. The upper part of the activated carbon layer protrudes outward along a direction perpendicular to the central axis of the activated carbon layer to form a second annular part, so as to cover the fine sand layer. The upper part of the second annular part protrudes upward to form a conical part for cooperating with the guide plate.

[0015] The coarse sand layer, fine sand layer, and activated carbon layer all contact the bottom of the rainwater harvesting tank. This close contact ensures the stable placement of each filter layer at the bottom of the tank. The two circular sections further enhance the sealing between the filter layers. On one hand, they effectively prevent rainwater leakage as it passes through the filter layers, avoiding situations where rainwater bypasses a filter layer and enters the next layer or is directly discharged from the collection tank without sufficient filtration, thus ensuring the integrity of the rainwater purification process. On the other hand, well-sealed filter layers also better resist the intrusion of external impurities, such as preventing silt and sand from the bottom of the tank from mixing into the filter layers during water flow fluctuations, thus affecting the filtration effect. The upper part of the second circular section protrudes upward to form a conical part for cooperating with the guide plate. This design makes the connection between the guide plate and the activated carbon layer and surrounding structures smoother. The various parts cooperate and connect tightly to form a complete and efficient rainwater filtration and purification system, improving the overall performance of the rainwater harvesting tank and enabling it to better meet the needs of rainwater drainage from municipal road green belts in terms of collection, filtration, purification, and diversion.

[0016] Furthermore, the rainwater diversion and discharge structure of the municipal road green belt also includes an infiltration module. The infiltration module includes a second connecting pipe connected to the collection module, an infiltration well set in the soil layer at the bottom of the green belt, an infiltration pipe set on the diversion pipe, and a permeable geotextile covering the infiltration well and the infiltration pipe. The permeable geotextile is used to allow rainwater to infiltrate and prevent soil particles from passing through. The infiltration well has a well wall made of porous material. The porous material forms a pore structure in the well wall to allow rainwater to infiltrate into the underground soil. The infiltration pipe is provided with multiple infiltration holes to allow rainwater to infiltrate into the surrounding soil.

[0017] The infiltration wells and pipes in the infiltration module provide a direct pathway for rainwater to infiltrate into the underground soil. The well walls are constructed with porous materials, creating a porous structure that allows rainwater to slowly seep into the surrounding soil. Simultaneously, the infiltration pipes have multiple infiltration holes, which also allow rainwater to infiltrate into the surrounding soil. This design allows some rainwater, after collection and diversion, to return to the natural soil environment, simulating the infiltration process of natural precipitation. This helps replenish groundwater resources, maintain groundwater balance, and positively impacts the conservation of surrounding soil. Compared to simply discharging all rainwater into stormwater networks or natural water bodies, the infiltration module increases the options for rainwater destination, allowing some rainwater to infiltrate naturally in situ. This aligns more with ecological rainwater management principles and helps maintain the stability of the regional ecosystem. The permeable geotextile covering the infiltration wells and pipes plays a crucial protective role. On one hand, it allows rainwater to infiltrate smoothly, ensuring that rainwater can enter the soil as designed. On the other hand, it can effectively prevent soil particles from passing through, thus avoiding the soil particles from flowing with the rainwater during the rainwater infiltration process and clogging the pore structure of the infiltration well or the infiltration holes of the infiltration pipe.

[0018] Furthermore, a first check valve is installed on the second connecting pipe to prevent rainwater from flowing back from the infiltration well to the collection module.

[0019] The first check valve effectively prevents rainwater from flowing back from the infiltration well to the collection module. In some special cases, such as when the soil moisture content around the infiltration well is too high, or when the groundwater level rises abnormally relative to the collection module, rainwater may flow back from the infiltration well to the collection module if there is no check valve.

[0020] Furthermore, a second check valve is installed on the outlet to prevent water from the rainwater pipe network or natural water bodies from flowing back into the drainage module.

[0021] The second check valve effectively prevents water from the stormwater drainage network or natural water bodies from flowing back into the drainage module. In extreme weather conditions such as heavy rain, the water level in the stormwater drainage network may rise sharply, or the water level in natural water bodies may rise due to tides, floods, or other factors. Without the second check valve, this water could flow backward into the drainage module. By preventing backflow, the second check valve indirectly prevents the intrusion of impurities and organisms, protecting the drainage module and its internal facilities, extending their service life, and reducing maintenance and cleaning workload and costs.

[0022] Furthermore, the inclined diversion pipes have a slope for diverting rainwater, with the slope ranging from 0.5% to 3%.

[0023] The diversion pipes are designed with a specific slope, utilizing gravity to provide a stable flow force for rainwater. Within this slope range of 0.5%-3%, rainwater can flow naturally and continuously from the inlet to the outlet, avoiding the slow flow or stagnation that can occur with insufficient slope, ensuring that rainwater is promptly and smoothly diverted to the drainage module for subsequent discharge and treatment. This gravity-based stable water flow eliminates the need for additional power equipment to propel the rainwater, saving energy costs, reducing the complexity of system operation and maintenance, and improving the overall reliability of the rainwater diversion and discharge structure.

[0024] The beneficial effects of this utility model are: efficient diversion, utilization, and discharge of rainwater; the diversion channel, the funnel-shaped inlet sidewall, the trumpet-shaped first connecting pipe, and the sloped diversion pipe can quickly and efficiently collect and discharge rainwater; the cooperation between the modules enables the discharge and utilization of the collected rainwater; it is also ecological and environmentally friendly, as the multi-layer filter design, the setting of the bar, and the design of the check valve can effectively purify the discharged rainwater while preventing external water bodies, debris, and organisms from entering the diversion and discharge structure. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a rainwater diversion and discharge structure for a municipal road green belt according to the present invention;

[0026] Figure 2 This is a schematic diagram of the second overall structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the flow guide channel and the first grille of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the filter module of this utility model;

[0029] Figure 5 This is a schematic diagram of the permeation module of this utility model.

[0030] The reference numerals in the attached drawings include: 1. Collection module; 11. Inlet; 12. Diversion channel; 13. First grid; 14. Rainwater collection tank; 15. First connecting pipe; 16. Arc-shaped part; 2. Diversion module; 21. Diversion pipe; 3. Drainage module; 31. Outlet; 32. Second grid; 33. Second check valve; 4. Filtration module; 41. Coarse sand layer; 42. Fine sand layer; 421. First annular part; 43. Activated carbon layer; 431. Second annular part; 432. Conical part; 44. Diversion plate; 5. Infiltration module; 51. Second connecting pipe; 511. First check valve; 52. Infiltration well; 521. Well wall; 53. Infiltration pipe; 531. Infiltration hole; 54. Permeable geotextile. Detailed Implementation

[0031] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0032] Please see Figures 1 to 5 As shown, this utility model discloses a rainwater diversion and discharge structure for a municipal road green belt, comprising a collection module 1 located in the soil layer below the green belt for collecting rainwater, a diversion module 2 for guiding the rainwater collected by the collection module 1, and a drainage module 3 for discharging the rainwater guided by the diversion module 2 to the urban rainwater pipe network or a nearby natural water body. The collection module 1 has an inlet 11 located on the side of the green belt near the road, and the inlet 11 is located below the top surface of the municipal road. The diversion module 2 has a diversion pipe 21 inclinedly set in the soil layer below the green belt, the upper end of the diversion pipe 21 being connected to the bottom of the inlet 11 for guiding rainwater to the drainage module 3. The drainage module 3 has an outlet 31 connected to the lower end of the diversion pipe 21, and the outlet 31 being connected to the rainwater pipe network or a natural water body.

[0033] In practical use, since the inlet 11 is located below the top surface of the municipal road, it naturally guides rainwater from the municipal road into the collection module 1. This topographical design requires no additional power, effectively collecting road runoff, reducing the possibility of road flooding, and ensuring normal traffic flow and pedestrian safety. The inlet 11 is positioned on the side of the green belt near the road, allowing for precise collection of rainwater from the road, avoiding the collection of water from unnecessary areas, and improving collection efficiency and targeted utilization of rainwater resources. The diversion pipe 21 is inclined and positioned in the soil layer below the green belt, with its upper end connected to the bottom of the inlet 11. This structure allows rainwater to flow stably from the collection module 1 to the drainage module 3 under gravity. The inclined design ensures the directionality of rainwater flow, preventing disorderly diffusion or accumulation of rainwater in the soil layer below the green belt. Stable diversion prevents excessive accumulation of rainwater in the green belt, avoiding potential waterlogging damage to the roots of the vegetation and promoting healthy plant growth. The outlet 31 of the drainage module 3 is connected to the lower end of the diversion pipe 21, and the outlet 31 is connected to the rainwater pipe network or natural water body, forming a complete drainage path. This allows the collected and diverted rainwater to be discharged in a timely manner, preventing rainwater from stagnating in the drainage structure and ensuring the smooth operation of the entire drainage system.

[0034] Specifically, the collection module 1 has a diversion channel 12 set on the side of the road near the green belt. The diversion channel 12 is distributed around the outer periphery of the green belt. The diversion channel 12 is connected to the water inlet 11 to divert rainwater on the road to the water inlet 11. The side wall of the water inlet 11 is provided with an arc-shaped part 16, which is formed into a funnel structure.

[0035] In practical use, a guide channel 12 is installed on the side of the road near the green belt and distributed around the outer perimeter of the green belt, greatly expanding the rainwater collection range. It can effectively intercept rainwater flowing from different locations on the road, allowing more rainwater to be channeled into the collection module 1, rather than being limited to a localized area near the inlet 11, thereby improving the overall efficiency of the rainwater collection system. The sidewall of the inlet 11 is designed with an arc-shaped section 16, forming a funnel structure. This design further accelerates the speed at which rainwater enters the collection module 1. When rainwater flows through the guide channel 12 to the inlet 11, the funnel structure can gather and accelerate the rainwater, acting like a natural diverter, allowing the rainwater to flow more quickly and smoothly into the collection module 1, avoiding any stagnation or accumulation of rainwater at the inlet 11. The funnel structure can also adapt to rainwater inflow at different angles and flow rates. Even if the rainwater inflow angle is slightly off or the flow rate is large, it can be effectively guided and buffered by its arc-shaped sidewalls to ensure that the rainwater enters the collection module 1 stably, thus enhancing the adaptability of the collection module 1 under different rainfall conditions.

[0036] Specifically, the collection module 1 has a rainwater collection pool 14 connected between the inlet 11 and the diversion pipe 21. A first connecting pipe 15 is connected between the rainwater collection pool 14 and the inlet 11. The diameter of the first connecting pipe 15 from the inlet 11 to the rainwater collection pool 14 decreases and has a funnel-shaped structure.

[0037] In practical use, the rainwater harvesting tank 14 provides a dedicated space for collecting and storing rainwater. Located between the inlet 11 and the diversion pipe 21, it intercepts and temporarily stores rainwater flowing in from the inlet 11, preventing rainwater from being directly and quickly discharged through the diversion pipe 21, thus better retaining rainwater resources during rainfall. When rainwater enters the rainwater harvesting tank 14, the water flow speed slows down relatively within the tank, allowing more time and conditions for sediment, sediment, leaves, and other impurities carried in the water to settle. The first connecting pipe 15 from the inlet 11 to the rainwater harvesting tank 14 has a funnel-shaped structure with a diameter decreasing from large to small. This design facilitates smoother flow of rainwater from the inlet 11 into the rainwater harvesting tank 14. The large-diameter end of the pipe is connected to the inlet 11, which can quickly receive a large amount of rainwater flowing in from the inlet 11, just like a large-mouthed container, reducing the risk of rainwater accumulation and blockage at the inlet 11; while the gradually decreasing pipe diameter can compress and guide the rainwater to a certain extent, so that it enters the rainwater collection tank 14 at a more suitable flow rate and state, avoiding the rainwater from forming a large impact in the tank due to excessive flow rate, and further improving the efficiency of rainwater collection and introduction.

[0038] Specifically, the upper part of the inlet 11 is provided with a first grid 13, which has a mesh-like distribution of first rainwater screen holes for intercepting debris; the outlet 31 is provided with a second grid 32, which has a mesh-like distribution of second rainwater screen holes for intercepting debris and organisms in the rainwater pipe network or natural water body, and the aperture of the second rainwater screen holes is smaller than that of the first rainwater screen holes.

[0039] In actual use, a first grille 13 is installed above the inlet 11, and the grille has a mesh-like distribution of first rainwater sieve holes, which can intercept debris carried in the rainwater in the initial stage of rainwater entering the collection module 1. Common road debris such as leaves, branches, and plastic waste will be blocked outside the inlet 11 by the first grille 13, preventing these debris from entering the rainwater collection tank 14, diversion pipe 21 and other subsequent components with the rainwater. The second grille 32 and its second rainwater sieve holes installed on the outlet 31 can, on the one hand, intercept debris that may exist in the rainwater pipe network or natural water body from entering the drainage module 3, and on the other hand, the second grille 32 can also prevent rainwater in the drainage module 3 from carrying out organisms into the rainwater pipe network or natural water body during the discharge process. The inlet 11 mainly deals with rainwater flowing in from the road, which usually contains relatively large debris. The outlet 31 is designed to prevent debris from entering the rainwater pipe network or natural water bodies and to prevent the outflow of organisms. These potentially involved debris and organisms are relatively small, such as silt and small aquatic organisms. Therefore, a second rainwater screen with a smaller aperture is required to achieve finer filtration, ensuring that only fully filtered rainwater can enter and exit the drainage module 3. This further improves the filtration effect and ecological protection function of the entire rainwater diversion and discharge structure.

[0040] Specifically, the bottom of the rainwater collection tank 14 is provided with a barrel-shaped coarse sand layer 41, inside which is a barrel-shaped fine sand layer 42. The upper part of the fine sand layer 42 covers the coarse sand layer 41. Inside the fine sand layer 42 is a cylindrical activated carbon layer 43, the upper part of the activated carbon layer 43 covers the fine sand layer 42, and the upper part of the activated carbon layer 43 is provided with a conical guide plate 44. The guide plate 44 covers the activated carbon layer 43 to guide the incoming rainwater to the bottom of the rainwater collection tank 14.

[0041] In actual use, the coarse sand layer 41, fine sand layer 42, and activated carbon layer 43 at the bottom of the rainwater collection tank 14 constitute a multi-layer filtration system. The coarse sand layer 41 is barrel-shaped and can initially intercept larger particles of impurities in the rainwater, such as silt and small stones, acting as the first line of defense and reducing the burden on subsequent filtration layers. The fine sand layer 42 is also barrel-shaped and located inside and covers the coarse sand layer 41. Its particles are finer and can further filter out smaller particles of impurities that remain after passing through the coarse sand layer 41, further improving the purity of the rainwater. The activated carbon layer 43 is cylindrical and located inside and covers the fine sand layer 42. Activated carbon has a strong adsorption capacity and can adsorb organic matter, odors, and some heavy metal ions and other harmful substances in the rainwater, deeply purifying the rainwater and resulting in higher quality discharged rainwater, which is more conducive to protecting the ecological environment of the discharge area, such as the water quality of urban stormwater pipe networks or natural water bodies. The guide plate 44, located above the activated carbon layer 43, is conical and covers the activated carbon layer 43. Its main function is to guide rainwater entering the rainwater collection tank 14 more smoothly to the bottom of the rainwater collection tank 14. When rainwater falls into the rainwater collection tank 14, the guide plate 44 can guide the rainwater to flow evenly to the bottom along its conical surface, avoiding direct impact of rainwater on the activated carbon layer 43 or the formation of local water accumulation in the tank, ensuring that the rainwater can fully contact each filter layer and improve the filtration effect.

[0042] Specifically, the coarse sand layer 41, the fine sand layer 42, and the activated carbon layer 43 are all in contact with the bottom of the rainwater collection tank 14. The upper part of the fine sand layer 42 protrudes outward along a direction perpendicular to the central axis of the fine sand layer 42 to form a first annular portion 421 to cover the coarse sand layer 41. The upper part of the activated carbon layer 43 protrudes outward along a direction perpendicular to the central axis of the activated carbon layer 43 to form a second annular portion 431 to cover the fine sand layer 42. The upper part of the second annular portion 431 protrudes upward to form a conical portion 432 for cooperating with the guide plate 44.

[0043] In actual use, the coarse sand layer 41, fine sand layer 42, and activated carbon layer 43 are all in contact with the bottom of the rainwater collection tank 14. This close contact ensures the stable placement of each filter layer at the bottom of the rainwater collection tank 14. The two annular sections further enhance the sealing between the filter layers. On the one hand, they effectively prevent rainwater from leaking when passing through each filter layer, avoiding the situation where rainwater bypasses a filter layer and enters the next layer or is directly discharged from the collection tank without being fully filtered, thus ensuring the integrity of the rainwater purification process. On the other hand, well-sealed filter layers can also better resist the intrusion of external impurities, such as preventing silt and sand from the bottom of the tank from mixing into the filter layer when the water flow fluctuates, affecting the filtration effect. The upper part of the second annular section 431 protrudes upward to form a conical section 432 for cooperating with the guide plate 44. This design makes the connection between the guide plate 44 and the activated carbon layer 43 and the surrounding structure smoother. The various parts work together closely to form a complete and efficient rainwater filtration and purification system, which improves the overall performance of the rainwater collection tank 14 and enables it to better meet the needs of rainwater diversion and discharge in municipal road green belts in terms of collection, filtration, purification and diversion.

[0044] Specifically, the rainwater diversion and discharge structure of the municipal road green belt also includes an infiltration module 5. The infiltration module 5 includes a second connecting pipe 51 connected to the collection module 1, an infiltration well 52 set in the bottom soil layer of the green belt, an infiltration pipe 53 set on the diversion pipe 21, and a permeable geotextile 54 covering the outside of the infiltration well 52 and the infiltration pipe 53. The permeable geotextile 54 is used to allow rainwater to infiltrate and prevent soil particles from passing through. The infiltration well 52 has a well wall 521 made of porous material. The porous material forms a pore structure in the well wall 521 for infiltrating rainwater into the underground soil. The infiltration pipe 53 is provided with multiple infiltration holes 531 for infiltrating rainwater into the surrounding soil.

[0045] In practical use, the infiltration wells 52 and infiltration pipes 53 in the infiltration module 5 provide a direct pathway for rainwater to infiltrate into the underground soil. The well walls 521 of the infiltration wells 52 are constructed of porous materials, forming a porous structure that allows rainwater to slowly infiltrate into the surrounding underground soil. Simultaneously, the infiltration pipes 53 have multiple infiltration holes 531, which also allow rainwater to infiltrate into the surrounding soil. This design allows some rainwater, after collection and diversion, to return to the natural soil environment, simulating the infiltration process of natural precipitation. This helps replenish groundwater resources, maintain the balance of the groundwater level, and plays a positive role in the conservation of the surrounding soil. Compared to simply discharging all rainwater into stormwater networks or natural water bodies, the infiltration module 5 increases the options for rainwater destination, allowing some rainwater to infiltrate naturally in situ, which is more in line with the concept of ecological rainwater treatment and helps maintain the stability of the regional ecosystem. The permeable geotextile 54 covering the infiltration wells 52 and infiltration pipes 53 plays a crucial protective role. On the one hand, it allows rainwater to infiltrate smoothly, ensuring that rainwater can enter the soil for infiltration as designed. On the other hand, it effectively prevents soil particles from passing through, avoiding the situation where soil particles flow with the rainwater during infiltration and thus block the pore structure of the infiltration well 52 or the infiltration holes 531 of the infiltration pipe 53.

[0046] Specifically, a first check valve 511 is provided on the second connecting pipe 51 to prevent rainwater from flowing back from the infiltration well 52 to the collection module 1.

[0047] In actual use, the first check valve 511 effectively prevents rainwater from flowing back from the infiltration well 52 to the collection module 1. In some special cases, such as when the soil moisture content around the infiltration well 52 is too high, or when the groundwater level rises, causing the water level in the infiltration well 52 to rise abnormally relative to the collection module 1, rainwater may flow back from the infiltration well 52 to the collection module 1 if there is no check valve.

[0048] Specifically, a second check valve 33 is provided on the outlet 31 to prevent water from the rainwater pipe network or natural water body from flowing back into the drainage module 3.

[0049] In practical use, the second check valve 33 effectively prevents water from the rainwater pipe network or natural water bodies from flowing back into the drainage module 3. In extreme weather conditions such as heavy rain, the water level in the rainwater pipe network may rise sharply, or the water level in natural water bodies may rise due to tides, floods, or other factors. Without the second check valve 33, this water might flow backward into the drainage module 3. By preventing backflow, the second check valve 33 indirectly prevents the intrusion of impurities and organisms, protecting the drainage module 3 and its internal facilities, extending their service life, and reducing maintenance and cleaning workload and costs.

[0050] Specifically, the inclined diversion pipe 21 has a slope for diverting rainwater, and the slope range is set to 0.5%-3%.

[0051] In practical use, the diversion pipe 21 is designed with a certain slope, which utilizes gravity to provide stable flow momentum for rainwater. Within this slope range of 0.5%-3%, rainwater can flow naturally and continuously from the inlet 11 to the outlet 31, avoiding the situation where rainwater flow is slow or even stagnant and accumulates in the pipe due to an insufficient slope. This ensures that rainwater can be promptly and smoothly diverted to the drainage module 3 for subsequent discharge treatment. This stable water flow momentum based on gravity eliminates the need for additional power equipment to drive the rainwater flow, saving energy costs, reducing the complexity of system operation and maintenance, and improving the operational reliability of the entire rainwater diversion and discharge structure.

[0052] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A rainwater diversion and discharge structure for green belts along municipal roads, characterized in that: The system includes a collection module (1) located in the soil layer below the green belt for collecting rainwater, a diversion module (2) for guiding the rainwater collected by the collection module (1), and a drainage module (3) for discharging the rainwater guided by the diversion module to the urban rainwater pipe network or nearby natural water bodies. The collection module (1) has an inlet (11) located on the side of the green belt near the road. The inlet (11) is located below the top surface of the municipal road. The diversion module (2) has a diversion pipe (21) inclined in the soil layer below the green belt. The upper end of the diversion pipe (21) is connected to the bottom of the inlet (11) for guiding the rainwater to the drainage module (3). The drainage module (3) has an outlet (31) connected to the lower end of the diversion pipe (21). The outlet (31) is connected to the rainwater pipe network or natural water bodies.

2. The rainwater diversion and discharge structure for municipal road green belts according to claim 1, characterized in that: The collection module (1) has a diversion channel (12) set on the side of the road near the green belt. The diversion channel (12) is distributed around the outer periphery of the green belt. The diversion channel (12) is connected to the inlet (11) to divert rainwater on the road to the inlet (11). The side wall of the inlet (11) is provided with an arc-shaped part (16), which is formed into a funnel structure.

3. The rainwater diversion and discharge structure for municipal road green belts according to claim 1, characterized in that: The collection module (1) has a rainwater collection pool (14) connected between the inlet (11) and the diversion pipe (21). A first connecting pipe (15) is connected between the rainwater collection pool (14) and the inlet (11). The diameter of the first connecting pipe (15) from the inlet (11) to the rainwater collection pool (14) is from large to small and has a funnel-shaped structure.

4. The rainwater diversion and discharge structure for municipal road green belts according to claim 1, characterized in that: The upper part of the inlet (11) is provided with a first grid (13), and the first grid (13) is provided with a mesh-distributed first rainwater screen hole for intercepting debris; the outlet (31) is provided with a second grid (32), and the second grid (32) is provided with a mesh-distributed second rainwater screen hole for intercepting debris and organisms in the rainwater pipe network or natural water body, and the aperture of the second rainwater screen hole is smaller than that of the first rainwater screen hole.

5. A rainwater diversion and discharge structure for municipal road green belts according to claim 3, characterized in that: The bottom of the rainwater collection tank (14) is provided with a barrel-shaped coarse sand layer (41), inside which is a barrel-shaped fine sand layer (42), the upper part of the fine sand layer (42) covers the coarse sand layer (41), inside which is a cylindrical activated carbon layer (43), the upper part of the activated carbon layer (43) covers the fine sand layer (42), and the upper part of the activated carbon layer (43) is provided with a cone-shaped guide plate (44), which covers the activated carbon layer (43) to guide the incoming rainwater to the bottom of the rainwater collection tank (14).

6. A rainwater diversion and discharge structure for municipal road green belts according to claim 5, characterized in that: The coarse sand layer (41), fine sand layer (42) and activated carbon layer (43) are all in contact with the bottom of the rainwater collection tank (14). The upper part of the fine sand layer (42) protrudes outward along the direction perpendicular to the central axis of the fine sand layer (42) to form a first ring (421) to cover the coarse sand layer (41). The upper part of the activated carbon layer (43) protrudes outward along the direction perpendicular to the central axis of the activated carbon layer (43) to form a second ring (431) to cover the fine sand layer (42). The upper part of the second ring (431) protrudes upward to form a conical part (432) for matching the guide plate (44).

7. A rainwater diversion and discharge structure for municipal road green belts according to claim 1, characterized in that: The rainwater diversion and discharge structure of the municipal road green belt also includes an infiltration module (5). The infiltration module (5) includes a second connecting pipe (51) connected to the collection module (1), an infiltration well (52) set in the soil layer at the bottom of the green belt, an infiltration pipe (53) set on the diversion pipe (21), and a permeable geotextile (54) covering the outside of the infiltration well (52) and the infiltration pipe (53). The permeable geotextile (54) is used to allow rainwater to infiltrate and prevent soil particles from passing through. The infiltration well (52) has a well wall (521) made of porous material. The porous material forms a pore structure in the well wall (521) for infiltrating rainwater into the underground soil. The infiltration pipe (53) is provided with multiple infiltration holes (531) for infiltrating rainwater into the surrounding soil.

8. A rainwater diversion and discharge structure for green belts along municipal roads according to claim 7, characterized in that: The second connecting pipe (51) is equipped with a first check valve (511) to prevent rainwater from flowing back from the infiltration well (52) to the collection module (1).

9. A rainwater diversion and discharge structure for municipal road green belts according to claim 1, characterized in that: A second check valve (33) is provided on the outlet (31) to prevent water from the rainwater pipe network or natural water body from flowing back into the drainage module (3).

10. A rainwater diversion and discharge structure for green belts along municipal roads according to claim 1, characterized in that: The inclined diversion pipe (21) has a slope for diverting rainwater, and the slope range is set to 0.5%-3%.

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