Ecological rainwater garden

Abstract

The invention discloses an ecological rainwater garden, and relates to the technical field of rainwater gardens, and the ecological rainwater garden comprises a kerb, a water storage system, a drainage system and a planting system; the curb is arranged on a road, and a drainage ditch and a foundation pit are formed in the road; the water storage system comprises a water storage tank; a water storage space is formed in the water storage tank; the drainage system comprises a drainage part and a floating part; the planting system comprises a planting layer, a sandy soil layer, a gravel layer and a water storage layer; the planting layer, the sand soil layer and the gravel layer are distributed from top to bottom in the space, located above the water storage tank, of the foundation pit in the vertical direction, and the particle sizes of the planting layer, the sand soil layer and the gravel layer are gradually increased; the water storage layer fills the space, located below the water storage tank, of the foundation pit and is used for storing water. The device can effectively help to eliminate accumulated water on the road surface, rainwater is purified and filtered to be effectively utilized, and meanwhile the survival rate of plants can be effectively guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of rain gardens, and in particular to an ecological rain garden. Background Art

[0002] With the acceleration of the urbanization process, the ecological negative effects caused by large-scale land development have become increasingly prominent. The large-area coverage of hardened ground not only occupies the natural water conservation area, but also seriously disrupts the original regional hydrological cycle system, resulting in a significant degradation of the natural sponge function. The resulting imbalance in the urban water ecosystem is manifested as a series of complex environmental problems such as a decline in hydrological regulation ability, an increase in water resource shortage, an increase in water pollution load, and an increase in flood control safety risks.

[0003] In response to the above problems, rain gardens have emerged as an innovative ecological solution. This technology realizes the maintenance of the stability of hydrological characteristic parameters before and after development through a bioretention system that simulates natural hydrological processes. Its core functions include: 1. Efficient infiltration and retention of runoff rainwater; 2. Natural recharge of groundwater; 3. Biodegradation of rainwater runoff pollution; 4. Sustainable supply of recycled landscape water. Such a multi-objective collaborative rainwater management facility not only meets the engineering and technical requirements of urban hydrological regulation but also takes into account the aesthetic value of the ecological landscape, forming a green infrastructure with composite functions.

[0004] Currently, green belts are usually set on the edges and in the middle of urban roads, and the plants planted in the green belts are used to achieve the effects of greening, cleaning the air, and collecting rainwater. However, the existing green belts cannot effectively help eliminate road surface water accumulation, and have poor effects on rainwater purification and filtration, and cannot effectively utilize rainwater. Moreover, excessive collection of rainwater will also affect the survival of plants.

[0005] Therefore, there is an urgent need for an ecological rain garden specifically applied to the edges and in the middle of roads. Summary of the Invention

[0006] This application provides an ecological rain garden that can effectively help eliminate road surface water accumulation, purify and filter rainwater for effective utilization, and at the same time effectively ensure the survival rate of plants.

[0007] This application provides an ecological rain garden, adopting the following technical solutions: An ecological rain garden includes a curb, a water storage system, a drainage system, and a planting system; The curb is arranged on the road. There are drainage ditches and foundation pits on the road. The curb is located between the drainage ditch and the foundation pit and extends along the extension direction of the drainage ditch, and there are a plurality of drainage holes on the curb for the water in the foundation pit to drain out; The water storage system includes a water storage tank; the water storage tank is arranged in the foundation pit and is separated into two upper and lower spaces in the foundation pit; the interior of the water storage tank has a water storage space, and a plurality of water seepage holes communicating with the water storage space are respectively formed through the top and bottom of the water storage tank. The drainage system includes a drainage member and a floating member; the drainage member is movably arranged in the drainage ditch in the vertical direction, the bottom of the drainage member has a groove, and a plurality of first drainage ports communicating with the groove are formed through the top of the drainage member, and a plurality of second drainage ports communicating with the groove are formed through both sides of the drainage member; the floating member is arranged on the drainage member, the drainage member is adapted to the drainage ditch, when the water in the drainage ditch exceeds a certain amount, the floating member drives the drainage member to move upward and partially extends out of the drainage ditch; a plurality of water replenishing holes and a plurality of water storage holes are formed in the interior of the road between the drainage ditch and the foundation pit, two ends of the water replenishing hole respectively communicate with the drainage ditch and the space above the water storage tank in the foundation pit, and two ends of the water storage hole respectively communicate with the drainage ditch and the water storage space; when the drainage member is located in the drainage ditch, the water replenishing hole communicates with the groove and the drainage member blocks one end of the water storage hole away from the water storage space; after the drainage member moves upward a certain distance, the water storage hole communicates with the drainage ditch. The planting system includes a planting layer, a sandy soil layer, a gravel layer and a water storage layer; the planting layer, the sandy soil layer and the gravel layer are distributed vertically from top to bottom in the space above the water storage tank in the foundation pit, and the particle sizes of the planting layer, the sandy soil layer and the gravel layer gradually increase; the water storage layer fills the space below the water storage tank in the foundation pit for storing water.

[0008] By adopting the above technical solutions, in rainy weather, when the rainfall is small, the rainwater directly falling into the foundation pit can successively penetrate into the planting layer, the sandy soil layer and the gravel layer and then enter the water storage tank, and then penetrate into the water storage layer, and the water accumulated on the road surface can enter the drainage ditch through the first drainage port and then enter the foundation pit through the second drainage port and the water replenishing hole; when the rainfall is large, among the rainwater directly falling into the foundation pit, the excessive rainwater can finally be stored in the water storage tank and the water storage layer, and at the same time can be discharged through the drainage holes into the drainage ditch, and the rainwater falling on the road surface can enter the drainage ditch through the first drainage port, and at the same time the water accumulated on the road surface can enter the drainage ditch through the second drainage port, and the sewage in the drainage ditch can enter the water storage tank through the water storage pipe, which can effectively improve the elimination efficiency of the road surface water accumulation; in both cases, it can effectively help eliminate the road surface water accumulation, purify and filter the rainwater to make it effectively utilized, and at the same time can effectively ensure the survival rate of plants.

[0009] Optionally, the curbstone includes a fixed part and a movable part; the movable part is movably connected to the road along a vertical direction and is located on a side of the fixed part away from the foundation pit; The movable part and the drainage part are linked by a linkage assembly. When the drainage part moves upward to the extreme position, the movable part moves downward to the extreme position and blocks the multiple water supply holes. At this time, the fixed part, the movable part and the drainage part are stepped, and the drainage holes on the fixed part are higher than the movable part.

[0010] By adopting the above technical solution, when the rainfall is heavy in rainy weather, excess rainwater in the foundation pit can be discharged into the drainage ditch through the drainage holes along the step surface, which can effectively reduce the impact of splashing of rainwater after being discharged from the foundation pit. At the same time, the top of the drainage component can be flushed with the help of rainwater, driving the debris that blocks the first drainage outlet on the top of the drainage component to leave the drainage component, so that the drainage component can restore its drainage effect by itself.

[0011] Optionally, the top of the movable part is rounded at a position away from the fixed part.

[0012] By adopting the above technical solution, the sharpness of the edge of the curb can be reduced, thereby effectively reducing the probability of injury caused by the sharp edge of the curb; at the same time, it can effectively improve the guiding effect of the top of the movable part on the flow of rainwater and improve the effect of rainwater flushing the top of the drainage part.

[0013] Optionally, one end of the water replenishment hole away from the drainage ditch leads to the gravel layer.

[0014] By adopting the above technical solution, the impact of rainwater entering the foundation pit through the water supply holes on the planting system can be reduced, that is, the impact of rainwater flow on plants and sand can be reduced, thereby further effectively improving the survival rate of plants.

[0015] Optionally, the top of the gravel layer is concave downward, and the thickness of the gravel layer is largest at a position close to the water replenishment hole.

[0016] By adopting the above technical solution, the gravel layer can have a certain effect of receiving and storing rainwater, making it convenient for plants to directly absorb the water needed for growth in the sandy soil layer; at the same time, the structural stability of the part around the gravel layer can be improved, thereby effectively reducing the impact of rainwater entering through the water supply holes.

[0017] Optionally, the drainage system further includes a filter element for filtering sewage; the filter element is fixedly mounted on the bottom of the drainage element to cover the opening at the bottom of the groove.

[0018] By adopting the above technical solutions, the water quality of the sewage entering the water storage space through the water storage holes can be improved, thereby effectively reducing the probability of clogging of the water seepage holes on the water storage holes and the water storage tank due to impurities, and enabling the water storage system to stably perform its water storage function.

[0019] Optionally, the drainage system further includes a filter medium, and the filter medium is restricted by the filter element and remains located in the groove.

[0020] By adopting the above technical solutions, the water quality of the sewage in the drainage ditch can be further improved, thereby effectively reducing the probability of clogging of the water replenishment holes, water storage holes and water seepage holes on the water storage tank due to impurities, and enabling both the drainage system and the water storage system to stably perform their respective functions.

[0021] Optionally, the drainage system further includes a partition; the partition is fixedly arranged on the road and located in the groove, and forms a separation in the groove; a plurality of relief openings for sewage to pass through are formed on the partition, and the filter medium is located between the partition and the filter element.

[0022] By adopting the above technical solutions, the position stability of the filter medium in the groove can be improved, enabling the filter medium to stably perform its filtering effect; at the same time, after the drainage member moves upward due to a large rainfall, the filter medium is more densely distributed between the partition and the filter element at this time, which can further improve its filtering effect on sewage, thereby further reducing the probability of sewage with more impurities entering the water storage space through the water storage holes.

[0023] Optionally, the water storage system further includes a plurality of water absorption members with water absorption properties; the water absorption members are vertically arranged in the foundation pit, pass through the water storage tank, one end of which is located in the water storage layer and part of which is located in the planting layer.

[0024] By adopting the above technical solutions, it is convenient for plants to absorb the water in the water storage space and the water in the water storage layer through the water absorption members, thereby further improving the growth quality of plants.

[0025] Optionally, the water absorption member has air permeability, and the top of the water absorption member is located above the planting layer; an air vent space is formed inside the water absorption member, one end of the air vent space penetrates through the bottom of the water absorption member to form an opening, and the other end has a plurality of openings formed on the periphery of the top of the water absorption member.

[0026] By adopting the above technical solutions, it is convenient for the roots of plants to absorb external air through the water absorption members in the soil layer, thereby further improving the growth quality of plants.

[0027] In summary, the present application includes at least one of the following beneficial effects: 1. It can effectively help eliminate road surface water, purify and filter rainwater for effective utilization, and effectively ensure the survival rate of plants; 2. It can effectively reduce the impact of heavy rainfall on plants, and can promptly eliminate road surface water, storing water that exceeds the needs of plant growth for subsequent use; 3. It can effectively improve the growth quality of plants and provide them with a growth environment with sufficient water and air; 4. It can fully and effectively filter the sewage that enters the foundation pit through the drainage ditch, reducing the impact of excessive impurities in the sewage on the water storage function, drainage function and the normal growth of plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of an ecological rainwater garden in an embodiment of the present application when the rainfall is small; Figure 2 This is a schematic diagram of the structure of an ecological rainwater garden in an embodiment of the present application when the rainfall is heavy.

[0029] Explanation of the reference numerals in the accompanying drawings: 1. Road; 11. Drainage ditch; 12. Foundation pit; 13. Water supply hole; 14. Water storage hole; 2. Curbstone; 21. Drainage hole; 22. Fixed part; 23. Movable part; 3. Water storage system; 31. Water storage tank; 311. Water storage space; 312. Seepage hole; 32. Water-drawing part; 321. Ventilation space; 4. Drainage system; 41. Drainage part; 411. Groove; 412. First drainage outlet; 413. Second drainage outlet; 42. Floating part; 43. Filter part; 44. Partition; 441. Make way; 45. Filter medium; 5. Planting system; 51. Planting layer; 52. Sand layer; 53. Gravel layer; 54. Water storage layer; 6. Linkage assembly; 61. Rack; 62. Gear. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-2 This application is described in further detail.

[0031] Reference Figure 1 and Figure 2 The embodiment of the present application discloses an ecological rainwater garden, which is constructed at the edge of a road 1 and is used to effectively recycle, filter and utilize rainwater for plant growth, while being able to effectively eliminate road surface water.

[0032] Reference Figure 1 The ecological rainwater garden includes a curbstone 2, a water storage system 3, a drainage system 4 and a planting system 5. The curbstone 2 is used to separate the ecological rainwater garden from the road 1; the water storage system 3 is used to store rainwater and road surface water; the drainage system 4 is used to help eliminate road surface water; and the planting system 5 is used for plant growth.

[0033] Along the extension direction of Road 1, a drainage ditch 11 for eliminating road surface water accumulation and a foundation pit 12 for constructing an ecological rain garden are provided at the edge of Road 1, and the foundation pit 12 is located on the side of the drainage ditch 11 away from the road surface; the curbstone 2 is constructed on Road 1 and is located between the drainage ditch 11 and the foundation pit 12. In this embodiment, preferably, the width dimension of the drainage ditch 11 is smaller than the width dimension of the foundation pit 12, and the depth dimension of the drainage ditch 11 is smaller than the depth dimension of the foundation pit 12.

[0034] The water storage system 3 includes a water storage tank 31 and a plurality of water pumping members 32. Among them, the water storage tank 31 is used to store rainwater and road surface water; the water pumping members 32 are used to help plants absorb water according to needs and ventilate with the outside world.

[0035] The water storage tank 31 is fixedly installed in the foundation pit 12. In the foundation pit 12, the foundation pit 12 is divided into upper and lower spaces, and the position of the water storage tank 31 inside Road 1 is lower than the bottom of the drainage ditch 11; the inside of the water storage tank 31 has a water storage space 311 for storing water, and a plurality of water seepage holes 312 are evenly provided at the top and bottom of the water storage tank 31, so that water can enter and exit the water storage space 311 and the foundation pit 12 through the water seepage holes 312.

[0036] The water pumping member 32 is integrally in a cylindrical structure. It is installed in the foundation pit 12 in a state where the axis is vertical and is fixedly installed on the water storage tank 31, and the installation positions of the plurality of water pumping members 32 on the water storage tank 31 are distributed in a rectangular array; the bottom of the water pumping member 32 is close to the bottom of the foundation pit 12, and the top of the water pumping member 32 is located above the foundation pit 12; the water pumping member 32 has water absorption and air permeability, and an air ventilation space 321 for gas circulation is provided inside it. The air ventilation space 321 penetrates through the bottom of the water pumping member 32 to form an opening and forms a plurality of openings on the periphery of the top of the water pumping member 32. In this embodiment, preferably, the water pumping member 32 is made of sponge material, and preferably, the opening formed by the air ventilation space 321 at the top of the water pumping member 32 is inclined downward outward; since the water pumping member 32 with the above functions is a common existing technology, it will not be elaborated here, and it is only briefly shown in the drawings.

[0037] The planting system 5 includes a planting layer 51, a sandy soil layer 52, a gravel layer 53, and a water storage layer 54. Among them, the planting layer 51 is used for the growth and rooting of plants; both the sandy soil layer 52 and the gravel layer 53 are used for rainwater infiltration and filtration of rainwater, and the particles of the sandy soil layer 52 are smaller than those of the gravel layer 53, that is, the rainwater filtration effect of the sandy soil layer 52 is greater than that of the gravel layer 53; the water storage layer 54 is used to store water for subsequent plant growth.

[0038] The planting layer 51, the sandy soil layer 52, and the gravel layer 53 are sequentially distributed in the space above the water storage tank 31 in the foundation pit 12 from top to bottom in the vertical direction. The planting layer 51 is suitable for plants to take root and grow, and the plane at the top of the planting layer 51 is higher than the road surface of the road 1; the top of the gravel layer 53 has a downward concave structure, and the thickness dimension of the gravel layer 53 at the position close to the side wall of the foundation pit 12 is greater than the thickness dimension of the gravel layer 53 at other positions, so that the gravel layer 53 has a certain effect of receiving and gathering rainwater, which is convenient for the roots of subsequent plants to directly absorb water from the gravel layer 53 through the planting layer 51 and the sandy soil layer 52; the bottom of the gravel layer 53 is in contact with the top of the water storage tank 31, and the size of the water seepage hole 312 is much smaller than the size of the particles in the foundation pit 12, and only allows water to pass through; the water storage layer 54 fills the space in the foundation pit 12 below the water storage tank 31, and the gaps between the particles are relatively large, having a strong water storage effect. In this embodiment, it is preferable that the planting layer 51, the sandy soil layer 52, the gravel layer 53, and the water storage layer 54 with the above effects are all prior arts in the field, so the materials thereof are not further limited herein.

[0039] At this time, the bottom of the water pumping member 32 penetrates into the water storage layer 54, and the top of the water pumping member 32 passes through the gravel layer 53, the sandy soil layer 52, and the planting layer 51 in sequence and is located above the planting layer 51; so that the top of the ventilation space 321 communicates with the space above the planting layer 51, and the planting layer 51, the sandy soil layer 52, and the gravel layer 53 can all draw water from the water storage space 311 and the water storage layer 54 through the water pumping member 32, and the planting layer 51, the sandy soil layer 52, the gravel layer 53, and the water storage layer 54 can all form air circulation with the space above the planting layer 51 through the water pumping member 32, so that the water and air in the planting layer 51 can meet the growth requirements of plants, thereby improving the growth quality of plants.

[0040] The drainage system 4 includes a drainage member 41 and a floating member 42. Among them, the drainage member 41 is used to assist in draining the road surface water, and at the same time can effectively prevent impurities from directly entering the drainage ditch 11, reducing the probability that the drainage effect in the drainage ditch 11 is affected due to impurity blockage; the floating member 42 is used to facilitate the drainage member 41 to change its position under different drainage requirements, so that the drainage efficiency matches the drainage requirements.

[0041] The drainage member 41 is integrally in a cuboid structure. It is movably installed on the road 1 and is entirely located in the drainage ditch 11 during its movement, and the movement direction of the drainage member 41 is vertical. A groove 411 in the shape of a cuboid is formed at the bottom of the drainage member 41. The length direction of the groove 411 is parallel to the length direction of the drainage member 41, and the width direction of the groove 411 is parallel to the width direction of the drainage member 41. Moreover, the groove 411 penetrates the bottom of the drainage member 41 to form an opening. A plurality of first drainage openings 412 communicating with the groove 411 are evenly formed at the top of the drainage member 41. A plurality of second drainage openings 413 communicating with the groove 411 are evenly formed on both sides in the width direction of the drainage member 41. Both the first drainage openings 412 and the second drainage openings 413 can allow the road surface water accumulation to pass through and intercept impurities.

[0042] A plurality of water replenishing holes 13 and a plurality of water storage holes 14 are formed inside the road 1 between the drainage ditch 11 and the foundation pit 12. Both ends of the water replenishing holes 13 and both ends of the water storage holes 14 communicate with the drainage ditch 11 and the foundation pit 12 respectively, and the water replenishing holes 13 are located above the water storage holes 14. After the water storage tank 31 is installed in the foundation pit 12, one end of the water replenishing hole 13 close to the foundation pit 12 will communicate with the space above the water storage tank 31 in the foundation pit 12. One end of the water storage hole 14 communicates with the bottom of the drainage ditch 11 and the other end communicates with the water storage space 311. In this embodiment, preferably, the water replenishing holes 13 are formed along the width direction of the foundation pit 12, and preferably, the water storage holes 14 are formed along the direction perpendicular to the length direction of the foundation pit 12 and are inclined downward toward the direction close to the foundation pit 12.

[0043] Furthermore, preferably, after the water storage tank 31 and the planting system 5 are both constructed in the foundation pit 12, the end of the water replenishing hole 13 far from the drainage ditch 11 will lead to the gravel layer 53, ensuring that the water in the drainage ditch 11 can enter the foundation pit 12 through the second drainage openings 413 and the water replenishing holes 13 in sequence, and at the same time, effectively reducing the impact of the water entering the foundation pit 12 on the structural stability of the planting system 5.

[0044] There are limitations during the movement of the drainage member 41 relative to the road 1.

[0045] When the drainage member 41 moves downward to the limit position, at this time, the surface of the top of the drainage member 41 is flush with the road surface of the road 1, and the bottom of the drainage member 41 contacts and abuts against the inner wall of the bottom of the drainage ditch 11. Moreover, at this time, the drainage member 41 blocks the end of the water storage hole 14 far from the water storage space 311, and the water replenishing hole 13 can communicate with the groove 411 through the second drainage opening 413, facilitating the elimination of the road surface water accumulation to be used for supplementing water to the planting system 5.

[0046] When the drain member 41 moves upward to the extreme position, at this time, the top of the drain member 41 will protrude out of the drainage ditch 11, and a gap is formed between the bottom of the drain member 41 and the inner wall of the bottom of the drainage ditch 11; at this time, the water replenishing hole 13 can still communicate with the groove 411 through the second drain port 413, and the water storage hole 14 can directly communicate with the drainage ditch 11; at this time, the external moisture can enter the groove 411 through the first drain port 412 and the second drain port 413 at the same time, and the moisture in the drainage ditch 11 can also be discharged through the water replenishing hole 13 and the water storage hole 14 respectively.

[0047] The floating member 42 is fixedly installed on the drain member 41. When there is a certain amount of moisture in the drainage ditch 11, the buoyancy received by the floating member 42 can drive the drain member 41 to move upward relative to the road 1. In this embodiment, preferably, the floating member 42 is fixedly installed on the groove wall of the groove 411; since the floating member 42 with the above functions is a common prior art, the specific material thereof is not further limited herein, and it is only briefly shown in the drawings.

[0048] A plurality of drain holes 21 for discharging the moisture that fails to penetrate into the planting system 5 are formed in the curbstone 2. The drain holes 21 are formed through the curbstone 2 along the width direction of the foundation pit 12, and one end of the drain holes 21 close to the foundation pit 12 is located above the planting layer 51 and close to the surface of the top of the planting layer 51.

[0049] At this time, when the rainwater falling on the planting system 5 is excessive, the excessive rainwater will be able to be discharged through the plurality of drain holes 21, and then fall on the drain member 41 and enter the drainage ditch 11 through the plurality of first drain ports 412.

[0050] Further, in order to reduce the influence caused by the splashing of the rainwater discharged through the drain holes 21 when it falls on the drain member 41, and at the same time reduce the probability of the first drain port 412 of the drain member 41 being blocked by impurities, preferably, the curbstone 2 includes a fixing member 22 fixedly connected to the road 1 and a movable member 23 that can move relative to the road 1 in the vertical direction, and preferably, a linkage assembly 6 for making the movement of the drain member 41 and the movement of the movable member 23 form a linkage is further installed between the drain member 41 and the curbstone 2.

[0051] The movable member 23 is located on the side of the fixing member 22 away from the foundation pit 12. A plurality of drain holes 21 are formed in both the fixing member 22 and the movable member 23, and there are limitations during the process of the movable member 23 moving relative to the road 1. When the movable member 23 moves upward to the extreme position, the top of the movable member 23 is flush with the top end face of the fixing member 22, and the plurality of drain holes 21 of the two are communicated; when the movable member 23 moves downward to the extreme position, the top of the movable member 23 will be located below the drain holes 21 on the fixing member 22, and one end openings of the plurality of drain holes 21 on the movable member 23 are blocked by the fixing member 22.

[0052] The linkage component 6 includes two racks 61 and a gear 62, and the racks 61 and the gear 62 can be meshed with each other.

[0053] The two racks 61 are respectively fixedly installed on the drain member 41 and the movable member 23. One rack 61 is located on the side of the drain member 41 close to the movable member 23 and is distributed along the height direction of the drain member 41 on the drain member 41, and the other rack 61 is located on the side of the movable member 23 close to the drain member 41 and is distributed along the moving direction of the movable member 23 on the movable member 23; the gear 62 is rotatably connected to the road 1 and is located inside the road 1. The rotation axis of the gear 62 is parallel to the length direction of the foundation pit 12. The gear 62 is located between the two racks 61 and is meshed with the two racks 61 at the same time.

[0054] When the rainfall is small, the rainwater falling into the foundation pit 12 can seep into the water storage space 311 and the water storage layer 54 in time, and the road surface water can enter the drainage ditch 11 through the first drain opening 412 in time and then enter the foundation pit 12 through the water replenishing hole 13; at this time, the drain member 41 will maintain the position state of moving downward to the limit position, and the movable member 23 will be kept in the position state of moving upward to the limit position through the linkage component 6.

[0055] When the rainfall is large, the rainwater falling into the foundation pit 12 cannot seep in time, and the excessive rainwater will be discharged through the drain holes 21, and the road surface water cannot be discharged through the water replenishing hole 13 in time after entering the drainage ditch 11; at this time, the drain member 41 will move upward to the limit position under the action of the floating member 42, and at the same time drive the movable member 23 to move downward to the limit position through the linkage component 6; at this time, the fixing member 22, the movable member 23 and the drain member 41 can form a stepped structure. The excessive rainwater in the foundation pit 12 can flow along the stepped surface to the top of the drain member 41 after being discharged through the multiple drain holes 21 on the fixing member 22 and then enter the drainage ditch 11 through the first drain opening 412. During this process, the scouring of the rainwater on the top of the drain member 41 can effectively drive the impurities blocking at the first drain opening 412 to leave; at the same time, the water on the road 1 can enter the drainage ditch 11 through the first drain opening 412 and the second drain opening 413 at the same time, and the water in the drainage ditch 11 can also be discharged through the water replenishing hole 13 and the water storage hole 14 at the same time.

[0056] Further, in order to improve the scouring effect of the rainwater on the top of the drain member 41 along the stepped surface and at the same time reduce the danger brought by the sharp edge of the curb 2, it is preferable to round the corner at the position where the top of the movable member 23 deviates from the fixing member 22.

[0057] Further, in order to improve the water quality of the accumulated water in the drainage ditch 11 entering the foundation pit 12 through the water replenishing hole 13 and the water storage hole 14, it is preferable that the drainage system 4 further includes a filtering member 43, a partition plate 44 and a filtering medium 45.

[0058] The filter element 43 is fixedly installed at the bottom of the drainage element 41, covering the opening at the bottom of the groove 411, allowing water to pass through while filtering impurities mixed in the water; the partition plate 44 is fixedly installed on the road 1 and is located in the drainage ditch 11. The partition plate 44 is parallel to the filter element 43 and is located above the filter element 43, and a plurality of relief openings 441 for water and small particle impurities to pass through are evenly formed on the partition plate 44. In this embodiment, preferably, both sides in the width direction of the partition plate 44 are in contact with and abutted against the two side walls of the groove 411, and preferably, the partition plate 44 divides the groove 411 into two upper and lower spaces in the groove 411.

[0059] The filter medium 45 is installed in the groove 411 and remains in the space between the partition plate 44 and the filter element 43. During the movement of the drainage element 41, one end of the water replenishing hole 13 away from the foundation pit 12 communicates with the space between the partition plate 44 and the filter element 43 through the second drainage port 413. In this embodiment, preferably, the filter medium 45 is activated carbon particles; in other embodiments, the filter medium 45 can also be other solid particles with filtering effects.

[0060] When the drainage element 41 moves downward to the limit position, the distribution density of the filter medium 45 in the space between the partition plate 44 and the filter element 43 is the smallest, that is, at this time, the filtering effect of the filter medium 45 on water is the lowest, but higher than the filtering effect of the filter element 43; when the drainage element 41 moves upward to the limit position, the space between the partition plate 44 and the filter element 43 decreases, resulting in an increase in the distribution density of the filter medium in the space between the partition plate 44 and the filter element 43. At this time, the filtering effect of the filter medium 45 on water is the highest.

[0061] The implementation principle of an ecological rain garden in an embodiment of this application is as follows: During rainy weather, when the rainfall is small, the rainwater directly falling into the foundation pit 12 can successively infiltrate into the planting layer 51, the sandy soil layer 52, and the gravel layer 53 and then enter the water storage tank 31, and then infiltrate into the water storage layer 54, so that the excess rainwater can be stored in the water storage space 311 and the water storage layer 54; at this time, the accumulated water on the road surface can enter the drainage ditch 11 through the first drainage port 412, and after being filtered by multiple layers of the partition plate 44, the filter medium 45, and the filter element 43, it enters the gravel layer 53 through the second drainage port 413 and the water replenishing hole 13, facilitating the growth and utilization of plants; When the rainfall is relatively large, the drainage member 41 moves upward to the limit position under the action of the floating member 42 at this time, and the movable member 23 moves downward to the limit position accordingly; for the rainwater that directly falls into the foundation pit 12, the excessive rainwater can ultimately be stored in the water storage tank 31 and the water storage layer 54. At the same time, it can pass through the drain hole 21 and fall onto the top of the drainage member 41, enter the drainage ditch 11 through the first drainage port 412, and at the same time scour and clear the blockage of the top of the drainage member 41. Moreover, the road surface water can enter the drainage ditch 11 through the first drainage port 412 and the second drainage port 413. After the water in the drainage ditch 11 passes through multiple filtrations of the partition plate 44, the filter medium 45 and the filter member 43, it can enter the foundation pit 12 through the water replenishing hole 13 and the water storage hole 14 respectively, and finally be stored in the water storage tank 31 and the water storage layer 54; During the growth process of the plants in the planting system 5, they can draw water from the water storage space 311 and the water storage layer 54 through multiple water extraction members 32 according to their needs, and ventilate with the outside world, which is helpful for the growth of the plants.

[0062] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An ecological rainwater garden, characterized in that: It includes curbstone (2), water storage system (3), drainage system (4) and planting system (5); The curbstone (2) is arranged on a road (1), a drainage ditch (11) and a foundation pit (12) are provided on the road (1), the curbstone (2) is located between the drainage ditch (11) and the foundation pit (12) and extends along the extension direction of the drainage ditch (11), and a plurality of drainage holes (21) are provided on the curbstone (2) for draining water in the foundation pit (12); The water storage system (3) comprises a water storage tank (31); the water storage tank (31) is arranged in the foundation pit (12) and is separated into two upper and lower spaces in the foundation pit (12); the water storage tank (31) has a water storage space (311) inside, and a plurality of water seepage holes (312) communicating with the water storage space (311) are formed through the top and bottom of the water storage tank (31); The drainage system (4) comprises a drainage member (41) and a floating member (42); the drainage member (41) is movably arranged in the drainage ditch (11) along a vertical direction; the bottom of the drainage member (41) has a groove (411); the top of the drainage member (41) is provided with a plurality of first drainage openings (412) in communication with the groove (411); and both sides of the drainage member (41) are provided with a plurality of second drainage openings (413) in communication with the groove (411); the floating member (42) is arranged on the drainage member (41); the drainage member (41) is adapted to the drainage ditch (11); when the amount of water accumulated in the drainage ditch (11) exceeds a certain amount, the floating member (42) drives the drainage member (41) to move upward and partially extend out of the drainage ditch (11); the road ( 1) is provided with a plurality of water replenishment holes (13) and a plurality of water storage holes (14) between the drainage ditch (11) and the foundation pit (12); the two ends of the water replenishment holes (13) are respectively in communication with the drainage ditch (11) and the space of the foundation pit (12) above the water storage tank (31); the two ends of the water storage holes (14) are respectively in communication with the drainage ditch (11) and the water storage space (311); when the drainage member (41) is located in the drainage ditch (11), the water replenishment holes (13) are in communication with the groove (411) and the drainage member (41) blocks one end of the water storage hole (14) away from the water storage space (311); after the drainage member (41) moves upward a certain distance, the water storage hole (14) is in communication with the drainage ditch (11); The planting system (5) comprises a planting layer (51), a sandy soil layer (52), a gravel layer (53) and an aquifer (54); the planting layer (51), the sandy soil layer (52) and the gravel layer (53) are distributed vertically from top to bottom in the space above the water storage tank (31) in the foundation pit (12), and the particle sizes of the planting layer (51), the sandy soil layer (52) and the gravel layer (53) gradually increase; the aquifer (54) fills the space below the water storage tank (31) in the foundation pit (12) to store water.

2. The ecological rainwater garden according to claim 1, characterized in that: The curbstone (2) comprises a fixed part (22) and a movable part (23); the movable part (23) is movably connected to the road (1) in a vertical direction and is located on a side of the fixed part (22) facing away from the foundation pit (12); The movable part (23) and the drainage part (41) are linked via a linkage assembly (6); when the drainage part (41) moves upward to an extreme position, the movable part (23) moves downward to an extreme position and blocks the plurality of water supply holes (13); at this time, the fixed part (22), the movable part (23) and the drainage part (41) are in a stepped shape, and the drainage holes (21) on the fixed part (22) are higher than the movable part (23).

3. The ecological rainwater garden according to claim 2, characterized in that: The top of the movable part (23) is rounded at a position away from the fixed part (22).

4. The ecological rainwater garden according to claim 1, characterized in that: One end of the water replenishment hole (13) away from the drainage ditch (11) leads to the gravel layer (53).

5. The ecological rainwater garden according to claim 4, characterized in that: The top of the gravel layer (53) is concave downward, and the thickness of the gravel layer (53) is greatest at a position close to the water replenishment hole (13).

6. The ecological rainwater garden according to claim 1, characterized in that: The drainage system (4) further comprises a filter element (43) for filtering sewage; the filter element (43) is fixedly mounted on the bottom of the drainage element (41) to cover the opening at the bottom of the groove (411).

7. The ecological rainwater garden according to claim 6, characterized in that: The drainage system (4) further comprises a filter medium (45), and the filter medium (45) is restricted by the filter element (43) and remains in the groove (411).

8. The ecological rainwater garden according to claim 7, characterized in that: The drainage system (4) further comprises a partition (44); the partition (44) is fixedly arranged on the road (1) and located in the groove (411), and forms a partition in the groove (411); a plurality of clearance openings (441) for sewage to pass through are formed on the partition (44), and the filter medium (45) is located between the partition (44) and the filter element (43).

9. The ecological rainwater garden according to claim 1, characterized in that: The water storage system (3) further comprises a plurality of water-absorbing water-drawing members (32); the water-drawing members (32) are vertically arranged in the foundation pit (12), pass through the water storage tank (31), one end of the water-drawing members is located in the water storage layer (54) and part of the water-drawing members is located in the planting layer (51).

10. The ecological rainwater garden according to claim 9, characterized in that: The water-drawing member (32) is air-permeable, and the top of the water-drawing member (32) is located above the planting layer (51); a ventilation space (321) is provided inside the water-drawing member (32), one end of the ventilation space (321) penetrates the bottom of the water-drawing member (32) to form an opening, and the other end forms a plurality of openings on the circumference of the top of the water-drawing member (32).

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