An ecological rain garden

Abstract

The present application discloses an ecological rain garden, which relates to the technical field of rain gardens and includes a curb, 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 opened on the road; the water storage system includes a water storage tank; the interior of the water storage tank has a water storage space; the drainage system includes a drainage member and a floating member; 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 of the foundation pit above the water storage tank, 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 of the foundation pit below the water storage tank for storing water. The present application can effectively help eliminate road surface water accumulation, purify and filter rainwater for effective utilization, and at the same time can effectively ensure the survival rate of plants.

Description

Technical Field

[0001] This application relates to the technical field of rain gardens, and particularly 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 significant. The large-scale coverage of hard 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 body function. The resulting imbalance in the urban water ecosystem is manifested as a complex environmental problem 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. Through a bioretention system that simulates natural hydrological processes, this technology maintains the stability of hydrological characteristic parameters before and after development. 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. This 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 ecological landscapes, forming a green infrastructure with composite functions.

[0004] Existing ones usually set green belts at the edges and in the middle of urban roads, and through the plants planted in the green belts, the effects of greening, cleaning the air and collecting rainwater are achieved. However, the existing green belts cannot effectively help eliminate road surface water accumulation, and at the same time have a poor effect on purifying and filtering rainwater, and there is no way to 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, which can effectively help eliminate road surface water accumulation, purify and filter rainwater for effective utilization, and at the same time can effectively ensure the survival rate of plants.

[0007] This application provides an ecological rain garden, adopting the following technical solutions:

[0008] An ecological rain garden includes a curb, a water storage system, a drainage system and a planting system;

[0009] The curbstone is arranged on the road. A drainage ditch and a foundation pit are formed on the road. The curbstone is located between the drainage ditch and the foundation pit and extends along the extension direction of the drainage ditch. A plurality of drainage holes for draining water in the foundation pit are formed in the curbstone.

[0010] The water storage system includes a water storage tank. The water storage tank is arranged in the foundation pit and is divided into two upper and lower spaces in the foundation pit. The interior of the water storage tank has a water storage space. A plurality of water seepage holes communicating with the water storage space are formed through the top and bottom of the water storage tank.

[0011] 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. A groove is formed at the bottom of the drainage member. A plurality of first drainage openings communicating with the groove are formed at the top of the drainage member, and a plurality of second drainage openings communicating with the groove are formed on both sides thereof. 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 extend 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. The two ends of the water replenishing hole communicate with the drainage ditch and the space above the water storage tank in the foundation pit respectively. The two ends of the water storage hole communicate with the drainage ditch and the water storage space respectively. 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.

[0012] 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.

[0013] By adopting the above technical scheme, in rainy weather, when the rainfall is small, the rainwater that falls directly into the foundation pit can penetrate into the planting layer, sand layer and gravel layer in turn and then enter the water storage tank, and then penetrate into the water storage layer, and the accumulated water on the road surface can enter the drainage ditch through the first drainage outlet and then enter the foundation pit through the second drainage outlet and the water replenishment hole; when the rainfall is large, the rainwater that falls directly into the foundation pit, the excess rainwater can eventually be stored in the water storage tank and the water storage layer, and can be discharged into the drainage ditch through the drainage hole, and the rainwater that falls on the road surface can enter the drainage ditch through the first drainage outlet, and the accumulated water on the road surface can enter the drainage ditch through the second drainage outlet, and the sewage in the drainage ditch can enter the water storage tank through the water storage pipe, which can effectively improve the efficiency of eliminating road surface water; in both cases, it can effectively help eliminate road surface water, purify and filter rainwater for effective utilization, and effectively ensure the survival rate of plants.

[0014] 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;

[0015] 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.

[0016] 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.

[0017] Optionally, the top of the movable part is rounded at a position away from the fixed part.

[0018] 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.

[0019] Optionally, one end of the water replenishment hole away from the drainage ditch leads to the gravel layer.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] By adopting the above technical scheme, the water quality of sewage entering the water storage space through the water storage hole can be improved, thereby effectively reducing the probability of the water storage hole and the seepage holes on the water storage tank being blocked by impurities, so that the water storage system can stably perform its water storage function.

[0025] Optionally, the drainage system further comprises a filter medium, and the filter medium is restricted by the filter element and remains in the groove.

[0026] By adopting the above technical scheme, the water quality of sewage in the drainage ditch can be further improved, thereby effectively reducing the probability of water replenishment holes, water storage holes and seepage holes on the water storage tank being blocked by impurities, so that the drainage system and the water storage system can both stably perform their respective functions.

[0027] Optionally, the drainage system also includes a partition; the partition is fixedly arranged on the road and located in the groove, and forms a partition in the groove; a plurality of clearance openings for sewage to pass through are opened on the partition, and the filter medium is located between the partition and the filter element.

[0028] By adopting the above technical solution, the position stability of the filter medium in the groove can be improved, so that the filter medium can stably exert the filtering effect; at the same time, after the drainage component moves upward due to heavy rainfall, the filter medium is more densely distributed between the partition and the filter element, which can further improve its filtering effect on sewage, thereby further reducing the probability of sewage mixed with more impurities entering the water storage space through the water storage hole.

[0029] Optionally, the water storage system further comprises a plurality of water-absorbing water-drawing members; the water-drawing members are vertically arranged in the foundation pit, pass through the water storage tank, one end of the water-drawing members is located in the aquifer and part of the water-drawing members is located in the planting layer.

[0030] By adopting the above technical solution, 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 member, thereby further improving the growth quality of plants.

[0031] Optionally, the water absorption member has air permeability, and the top of the water absorption member is located above the planting layer; an air ventilation space is formed inside the water absorption member, one end of the air ventilation space penetrates the bottom of the water absorption member to form an opening, and the other end is formed with a plurality of openings on the periphery of the top of the water absorption member.

[0032] By adopting the above technical solution, it is convenient for the roots of plants to absorb external air through the water absorption member in the soil layer, thereby further improving the growth quality of plants.

[0033] In summary, the present application includes at least one of the following beneficial effects:

[0034] 1. It 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;

[0035] 2. It can effectively reduce the impact of heavy rainfall on plants, and at the same time can promptly eliminate road surface water accumulation, store the water exceeding the growth requirements of plants for subsequent use;

[0036] 3. It can effectively improve the growth quality of plants and provide a growth environment with sufficient water and air for plants;

[0037] 4. It can effectively filter the sewage entering the foundation pit through the drainage ditch, and reduce the impact of excessive impurities in the sewage on the water storage function, drainage function and normal growth of plants. Description of the Drawings

[0038] Figure 1 It is a schematic structural diagram of an ecological rain garden in an embodiment of the present application when the rainfall is small;

[0039] Figure 2 It is a schematic structural diagram of an ecological rain garden in an embodiment of the present application when the rainfall is large.

[0040] Description of reference numerals: 1, road; 11, drainage ditch; 12, foundation pit; 13, water replenishing hole; 14, water storage hole; 2, curbstone; 21, drainage hole; 22, fixing member; 23, movable member; 3, water storage system; 31, water storage tank; 311, water storage space; 312, seepage hole; 32, water pumping member; 321, ventilation space; 4, drainage system; 41, drainage member; 411, groove; 412, first drainage port; 413, second drainage port; 42, floating member; 43, filtering member; 44, partition board; 441, relief opening; 45, filtering medium; 5, planting system; 51, planting layer; 52, sandy soil layer; 53, gravel layer; 54, water storage layer; 6, linkage assembly; 61, rack; 62, gear. Detailed implementation manners

[0041] The following further describes the present application in detail with reference to the Figure 1-2 accompanying drawings.

[0042] Referring to Figure 1 and Figure 2 , an ecological rain garden is disclosed in an embodiment of the present application, which is constructed at the edge of the road 1 and is used for effectively recycling, filtering and utilizing rainwater for plant growth, and at the same time can effectively eliminate the ponding on the road surface.

[0043] Referring to Figure 1 , the ecological rain garden includes a curbstone 2, a water storage system 3, a drainage system 4 and a planting system 5. Among them, the curbstone 2 is used to separate the ecological rain garden from the road 1; the water storage system 3 is used to store rainwater and the ponding on the road surface; the drainage system 4 is used to help eliminate the ponding on the road surface; the planting system 5 is used for plant growth.

[0044] A drainage ditch 11 for eliminating the ponding on the road surface and a foundation pit 12 for constructing the ecological rain garden are provided along the extension direction of the road 1 at the edge of the 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 the road 1 and is located between the drainage ditch 11 and the foundation pit 12. In this embodiment, it is preferably that 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.

[0045] 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 the ponding on the road surface; the water pumping members 32 are used to help plants draw water according to needs and ventilate with the outside.

[0046] 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 by the water storage tank 31, and the position of the water storage tank 31 inside the road 1 is lower than the bottom of the drainage ditch 11. The interior 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 formed in 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.

[0047] The water pumping member 32 is integrally in a cylindrical structure. It is installed in the foundation pit 12 with its axis vertical and fixedly installed on the water storage tank 31, and the installation positions of a 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. An air ventilation space 321 for gas circulation is formed inside the water pumping member 32. The air ventilation space 321 penetrates through the bottom of the water pumping member 32 to form an opening and a plurality of openings are formed on the periphery of the top of the water pumping member 32. In this embodiment, it is preferably that 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 prior art, it will not be elaborated here, and it is only briefly shown in the drawings.

[0048] 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 at the same time, 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 for storing water for subsequent plant growth.

[0049] 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 thereof 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, facilitating 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 and abuts against the top of the water storage tank 31, and the size of the water seepage holes 312 is much smaller than the size of the particles in the foundation pit 12, allowing only 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, preferably, the planting layer 51, the sandy soil layer 52, the gravel layer 53, and the water storage layer 54 having the above effects are all prior arts in the field, so the materials thereof are not further limited herein.

[0050] At this time, the bottom of the water extraction member 32 penetrates into the water storage layer 54, and the top of the water extraction member 32 successively penetrates through the gravel layer 53, the sandy soil layer 52, and the planting layer 51 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 extract the water in the water storage space 311 and the water in the water storage layer 54 through the water extraction 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 extraction 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.

[0051] 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.

[0052] 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.

[0053] 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, it is preferred that the water replenishing holes 13 are formed along the width direction of the foundation pit 12, and it is preferred that the water storage holes 14 are formed along a direction perpendicular to the length direction of the foundation pit 12 and inclined downward towards the foundation pit 12.

[0054] Furthermore, it is preferred that 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.

[0055] There are restrictions during the movement of the drainage member 41 relative to the road 1.

[0056] 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 plugs 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 replenishing water for the planting system 5.

[0057] When the drainage member 41 moves upward to the extreme position, at this time, the top of the drainage member 41 will extend out of the drainage ditch 11, and a gap is formed between the bottom of the drainage 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 drainage 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 drainage port 412 and the second drainage 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.

[0058] The floating member 42 is fixedly installed on the drainage 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 drainage 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.

[0059] A plurality of drainage holes 21 for discharging the moisture that fails to penetrate into the planting system 5 are formed in the curb 2. The drainage holes 21 are formed through the curb 2 along the width direction of the foundation pit 12, and one end of the drainage 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.

[0060] 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 drainage holes 21, and then fall on the drainage member 41 and enter the drainage ditch 11 through the plurality of first drainage ports 412.

[0061] Furthermore, in order to reduce the influence caused by the splashing of the rainwater discharged through the drainage holes 21 when it falls on the drainage member 41, and at the same time reduce the probability of the first drainage port 412 of the drainage member 41 being blocked by impurities, preferably, the curb 2 includes a fixing member 22 fixedly connected to the road 1 and a movable member 23 that can move vertically relative to the road 1, and preferably, a linkage assembly 6 for making the movement of the drainage member 41 and the movement of the movable member 23 form a linkage is further installed between the drainage member 41 and the curb 2.

[0062] The movable member 23 is located on the side of the fixing member 22 away from the foundation pit 12. A plurality of drainage 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 drainage 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 drainage holes 21 on the fixing member 22, and one end openings of the plurality of drainage holes 21 on the movable member 23 are blocked by the fixing member 22.

[0063] The linkage assembly 6 includes two racks 61 and one gear 62, and the racks 61 and the gear 62 can mesh with each other.

[0064] 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. 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 meshes with the two racks 61 at the same time.

[0065] 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 assembly 6.

[0066] 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, the movable member 23 will be driven to move downward to the limit position through the linkage assembly 6. At this time, the fixing member 22, the movable member 23 and the drain member 41 can form a stepped structure. After the excessive rainwater in the foundation pit 12 is discharged through the multiple drain holes 21 on the fixing member 22, it can flow along the stepped surface to the top of the drain member 41 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.

[0067] Further, 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 of the top of the movable member 23 facing away from the fixing member 22.

[0068] Further, to improve the water quality of the 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.

[0069] 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 located in the drainage ditch 11. The partition plate 44 is parallel to the filter element 43 and 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.

[0070] 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, the ends of the water replenishing holes 13 far from the foundation pit 12 communicate with the space between the partition plate 44 and the filter element 43 through the second drainage ports 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 a filtering effect.

[0071] 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.

[0072] The implementation principle of an ecological rain garden in an embodiment of the present application is as follows:

[0073] During rainy weather, when the rainfall is small, the rainwater directly falling into the foundation pit 12 can successively penetrate 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 penetrate 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;

[0074] When the rainfall is relatively large, at this time, the drainage member 41 moves upward to the limit position under the action of the floating member 42, 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 be discharged through the drain hole 21 to 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. The water in the drainage ditch 11 can pass through the partition plate 44, the filtering medium 45 and the filtering member 43 for multi-layer filtration and then 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;

[0075] 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.

[0076] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An ecological rain garden, characterized in that, It includes a curb (2), a water storage system (3), a drainage system (4), and a planting system (5); The curb (2) is arranged on the road (1). A drainage ditch (11) and a foundation pit (12) are formed on the road (1). The curb (2) is located between the drainage ditch (11) and the foundation pit (12) and extends along the extension direction of the drainage ditch (11). A plurality of drainage holes (21) for discharging water in the foundation pit (12) are formed on the curb (2); The water storage system (3) includes a water storage tank (31); the water storage tank (31) is arranged in the foundation pit (12) and divides the foundation pit (12) into upper and lower spaces; the interior of the water storage tank (31) has a water storage space (311), 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) includes a drainage member (41) and a floating member (42); the drainage member (41) is movably arranged in the drainage ditch (11) in the vertical direction. The bottom of the drainage member (41) has a groove (411). A plurality of first drainage ports (412) communicating with the groove (411) are formed at the top of the drainage member (41), and a plurality of second drainage ports (413) communicating with the groove (411) are formed on both sides thereof; the floating member (42) is arranged on the drainage member (41). The drainage member (41) is adapted to the drainage ditch (11). When the water 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); 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). The two ends of the water replenishing hole (13) communicate with the space above the water storage tank (31) of the drainage ditch (11) and the foundation pit (12) respectively. The two ends of the water storage hole (14) communicate with the drainage ditch (11) and the water storage space (311) respectively; when the drainage member (41) is located in the drainage ditch (11), the water replenishing hole (13) communicates 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) communicates with the drainage ditch (11); The planting system (5) includes a planting layer (51), a sandy soil layer (52), a gravel layer (53) and a water storage layer (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 where the foundation pit (12) is above the water storage tank (31), and the particle sizes of the planting layer (51), the sandy soil layer (52) and the gravel layer (53) gradually increase; the water storage layer (54) fills the space where the foundation pit (12) is below the water storage tank (31) for storing water.

2. The ecological rain garden according to claim 1, characterized in that, The curbstone (2) includes a fixing member (22) and a movable member (23); the movable member (23) is movably connected to the road (1) in the vertical direction and is located on the side of the fixing member (22) away from the foundation pit (12); A linkage is formed between the movable member (23) and the drainage member (41) through a linkage assembly (6). When the drainage member (41) moves upward to the limit position, the movable member (23) moves downward to the limit position and one end of the drainage hole (21) on the movable member (23) is blocked by the fixing member (22). At this time, the fixing member (22), the movable member (23) and the drainage member (41) are in a stepped shape, and the drainage hole (21) on the fixing member (22) is higher than the movable member (23).

3. An ecological rain garden according to claim 2, characterized in that, The top of the movable member (23) is rounded at the position away from the fixing member (22).

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

5. An ecological rain garden according to claim 4, characterized in that, The top of the gravel layer (53) is sunken downward, and the thickness of the gravel layer (53) is the largest at the position close to the water replenishing hole (13).

6. An ecological rain garden according to claim 1, characterized in that, The drainage system (4) further includes a filtering member (43) for filtering sewage; the filtering member (43) is fixedly installed at the bottom of the drainage member (41) to cover the opening at the bottom of the groove (411).

7. An ecological rain garden according to claim 6, characterized in that, The drainage system (4) further includes a filtering medium (45), and the filtering medium (45) is restricted by the filtering member (43) to remain in the groove (411).

8. An ecological rain garden according to claim 7, characterized in that, The drainage system (4) further includes a partition plate (44); the partition plate (44) is fixedly arranged on the road (1) and is located in the groove (411), and forms a partition in the groove (411); a plurality of relief openings (441) for sewage to pass through are formed on the partition plate (44), and the filtering medium (45) is located between the partition plate (44) and the filtering member (43).

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

10. An ecological rain garden according to claim 9, characterized in that, The water-absorbing member (32) has air permeability, and the top of the water-absorbing member (32) is located above the planting layer (51); an air vent space (321) is formed inside the water-absorbing member (32), one end of the air vent space (321) penetrates through the bottom of the water-absorbing member (32) to form an opening, and the other end is formed with a plurality of openings on the periphery of the top of the water-absorbing member (32).

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