A road drainage structure based on sponge city design

Abstract

This invention relates to a road drainage structure based on sponge city design, including drainage equipment excavated on both sides of the road and water storage equipment connected to the drainage equipment. The drainage equipment includes a ditch cover, a drainage ditch, a first filter device, a second filter device, and a drainage tank. The drainage ditch is located under the road, with a ditch cover at the top and a first filter device below the ditch cover. A second filter device is located at the bottom of the drainage ditch, and a drainage tank is located below the drainage ditch. In this invention, the two filter tanks are inclined downwards at their closest points, creating a certain height difference between the first infiltration hole and the first filter screen, accelerating the flow of rainwater and preventing the first infiltration hole from becoming clogged. At the same time, a second infiltration hole is provided at the lowest point of the first and second rings to prevent rainwater from accumulating in the filter tank when the cover is closed, thus preventing the generation of mosquitoes.

Description

Technical Field

[0001] This invention relates to the field of drainage and water storage structures, and more specifically to a road drainage structure based on sponge city design. Background Technology

[0002] Sponge cities absorb, store, infiltrate, and purify rainwater when it rains, and release and utilize the stored water when needed. There are also many sponge city road drainage structures on the market.

[0003] For example, the sponge city water storage and drainage structure (publication number: CN111827447A, publication date: 2020-10-27) includes a drainage unit installed on the road surface and a water storage unit connected to the drainage unit. The drainage unit includes a pre-collection box installed below the road surface and a drainage well cover connected to the top of the pre-collection box. The drainage well cover has a drainage outlet, an adjustment ring has a seepage outlet, and a water-proof groove is provided on the drainage well cover. The water-proof groove is located in the center of the drainage well cover. An installation ring is fixedly connected to the outside of the water-proof groove below the drainage well cover. A baffle is hinged on the installation ring. The baffle is used to cover the inner ring opening of the installation ring. A connecting rod that drives the baffle to move and open and close is connected between the adjustment ring and the baffle. The pre-collection box is provided with a drive component that drives the adjustment ring to rotate.

[0004] When the rainfall is light, the rainwater flows down from the drain outlet through the infiltration outlet into the pre-collection tank for collection. When the rainfall is heavy, the baffle moves away from the bottom of the anti-sumption trough, and the rainwater falls directly from the anti-sumption trough into the pre-collection tank for collection. However, this drainage structure lacks a flow guiding structure, and the height difference between the infiltration outlet and the anti-sumption trough is insufficient. As the rainwater flows down, it is easy to clog the infiltration outlet and accumulate on the surface. At the same time, this drainage structure does not perform further filtration of the collected rainwater in the collection tank. Summary of the Invention

[0005] To address the technical deficiencies in the background technology, this invention proposes a road drainage structure based on sponge city design, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows:

[0006] This invention relates to a road drainage structure based on sponge city design, including drainage equipment excavated on both sides of the road and water storage equipment connected to the drainage equipment. The drainage equipment includes a ditch cover, a drainage ditch, a first filter device, a second filter device, and a drainage tank. The drainage ditch is located under the road, with a ditch cover at the top of the drainage ditch, a first filter device below the ditch cover, a second filter device at the bottom of the drainage ditch, and a drainage tank below the drainage ditch.

[0007] The first filtration device includes a filter plate, a filter tank, a first filter screen, and a cover plate. There are two filter tanks, which are respectively located inside the filter plate. The two filter tanks are symmetrically distributed along the central axis of the filter plate along its length. The first filter screen is located at the bottom of the filter tank, and the cover plate is located above the first filter screen. The ends of the two filter tanks that are close to each other are inclined from top to bottom towards the central axis of the filter plate along its length.

[0008] The two filter tanks each include a first ring, a second ring, and a circular base. The circular base, the second ring, and the first ring are distributed sequentially from the inside out. The first ring is located above the second ring, and the second ring is located above the circular base. The circular base has an opening, and the first filter screen is located inside the opening. The filter tank has a first seepage hole and a second seepage hole. The first seepage hole is located at the end of the two filter tanks that is far apart from each other, and the second seepage hole is located at the end of the two filter tanks that is close to each other.

[0009] As a further technical solution of the present invention, a first side, a second side, and a third side are respectively provided between the first ring and the filter plate, between the second ring and the first ring, and between the second ring and the circular base. The first water seepage hole is arranged in an arc shape and is respectively provided between the first side and the first ring, and between the second side and the second ring.

[0010] As a further technical solution of the present invention, the ends of the first ring and the second ring away from the first seepage hole are respectively inclined from top to bottom towards the central axis of the filter plate in the length direction. The bottom of the inclined ends of the first ring and the second ring are on the same horizontal plane as the cover plate. The second seepage hole is circular and is respectively located on the bottom of the inclined ends of the first ring and the second ring.

[0011] As a further technical solution of the present invention, the water storage device includes a water storage tank, a pumping pipe and a pumping motor. The water storage tank is located below the road and is connected to a drainage tank through a pipe. The bottom end of the pumping pipe is located inside the water storage tank, and the top end of the pumping pipe is located above the road and is connected to the pumping motor.

[0012] As a further technical solution of the present invention, the first filter screen is fan-shaped and symmetrically distributed along the central axis of the circular base. A rotary motor is provided inside the filter plate. The rotary motor is located at the end of the filter plate away from the second seepage hole in the width direction. The rotary motor is connected to a cover plate, and the cover plate can rotate along the central axis of the circular base.

[0013] As a further technical solution of the present invention, the shape of the cover plate is consistent with the shape of the first filter screen, the center of the cover plate is provided with a rotating shaft, the center of the circular base is provided with a shaft, and a bearing matching the shaft is provided between the rotating shaft and the shaft.

[0014] As a further technical solution of the present invention, the second filter device is located at the bottom of the drainage ditch, the second filter device is provided with a second filter screen, the top of the drainage ditch is connected to the bottom of the filter plate, the side of the drainage ditch is set with an incline, the bottom of the drainage ditch is provided with an inclined block, the inclined block is located at both ends of the drainage ditch along the length direction of the filter plate, the drainage box is located below the inclined block, and the second filter screen is located at the top of the drainage box.

[0015] As a further technical solution of the present invention, the trench cover plate is provided with a plurality of through holes, the plurality of through holes being evenly arranged along the width direction of the trench cover plate, and a guardrail extending upward around the filter plate, the trench cover plate being embedded in the guardrail.

[0016] The beneficial effects of this invention are as follows:

[0017] The two filter tanks of the present invention are inclined downward at their close ends and are provided with a flow guiding structure consisting of a first ring, a second ring and a circular base, so that a certain height difference is formed between the first seepage hole and the first filter screen, which accelerates the flow of rainwater and prevents the first seepage hole from being blocked. At the same time, a second seepage hole is provided at the lowest point of the first ring and the second ring to prevent rainwater from accumulating in the filter tank when the cover is closed, thus preventing the generation of mosquitoes.

[0018] When the rainfall is light, rainwater can flow into the drainage ditch through the first or second infiltration hole. The openings of the first and second infiltration holes are small, which can prevent garbage from entering the drainage ditch. When the rainfall is heavy, the cover is opened, and the rainwater enters the drainage ditch through the first filter screen. The first filter can block garbage and large particles in the water from entering the drainage ditch.

[0019] The filter plate of the present invention extends upward around its perimeter to form a guardrail, and the trench cover is embedded in the guardrail. The entire first filter device is set below the trench cover, which allows the present invention to be hidden under the road, so as not to obstruct the movement of pedestrians or affect the appearance of the city.

[0020] The present invention provides an inclined surface and a second filter screen at the bottom of the drainage ditch. The inclined surface can guide rainwater entering the drainage ditch from the first or second seepage hole into the second filter screen. The second filter screen can further filter small particulate impurities in the rainwater. The first and second filtration devices have the functions of water absorption, water seepage and water purification. Attached Figure Description

[0021] Figure 1This is a schematic diagram of a road drainage structure based on sponge city design.

[0022] Figure 2 This is a structural diagram of a drainage ditch and drainage box for a road drainage structure based on sponge city design.

[0023] Figure 3 This is a diagram of the first filtration device for a road drainage structure based on sponge city design.

[0024] Figure 4 This is a cross-sectional view of the first filtration device in a road drainage structure based on sponge city design.

[0025] Figure 5 This is a structural diagram of two modes of the first filtration device for road drainage structure based on sponge city design.

[0026] Figure 6 This is an exploded view of the first filter screen and cover plate of a road drainage structure based on sponge city design.

[0027] The components include: 1. Road; 2. Drainage equipment; 3. Water storage equipment; 31. Water storage tank; 32. Pumping pipe; 33. Pumping motor; 4. Ditch cover; 41. Through hole; 5. Drainage ditch; 6. First filter device; 61. Filter plate; 611. Rotary motor; 612. Guardrail; 62. Filter tank; 62. First ring; 622. Second ring; 623. Circular base; 624. First seepage hole; 625. Second seepage hole; 626. First side; 627. Second side; 628. Third side; 63. First filter screen; 64. Cover plate; 641. Rotating shaft; 642. Bearing; 643. Shaft; 7. Second filter device; 71. Second filter screen; 72. Inclined block; 8. Drainage tank. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-6 The embodiments of the present invention will be described in conjunction with related examples. The embodiments of the present invention are not limited to the following examples, and the relevant necessary components of the present invention should be regarded as well-known technology in the field of this art, which can be known and mastered by those skilled in the art.

[0029] Sponge city is a new generation of urban stormwater management concept, which refers to the city's good "elasticity" in adapting to environmental changes and responding to natural disasters caused by rainwater. It can also be called "water-resilient city". The internationally used term is "low impact development stormwater system construction". When it rains, it absorbs, stores, infiltrates, and purifies water, and when needed, it "releases" and utilizes the stored water.

[0030] This invention conforms to the concept of stormwater management in new-generation cities and proposes a road drainage structure with water absorption, storage, infiltration, and purification functions.

[0031] This structure is a road drainage structure based on sponge city design, such as... Figure 1 As shown, the system includes drainage equipment 2 excavated on both sides of the road 1 and water storage equipment 3 connected to the drainage equipment 2. The drainage equipment 2 includes a ditch cover plate 4, a drainage ditch 5, a first filter device 6, a second filter device 7 and a drainage box 8. The drainage ditch 5 is located below the road 1. The top of the drainage ditch 5 is provided with a ditch cover plate 4. The first filter device 6 is provided below the ditch cover plate 4. The bottom of the drainage ditch 5 is provided with a second filter device 7. The drainage box 8 is provided below the drainage ditch 5.

[0032] Rainwater entering the drainage device 2 will pass through the ditch cover plate 4 and enter the first filter device 6, then through the drainage ditch 5 and enter the second filter device 7, and finally enter the drainage tank 8. The first filter device 6 can block a large amount of garbage and large particles of impurities in the rainwater, and the second filter device 7 can isolate small particles of impurities in the rainwater, achieving the effects of water absorption, water infiltration and water purification. The water storage device 3 connected to the drainage device 2 has the function of water storage.

[0033] like Figure 2 As shown, the trench cover plate 4 has a number of through holes 41, which are evenly arranged along the width direction of the trench cover plate 4. The filter plate 61 extends upward around the perimeter and is provided with guardrails 612. The trench cover plate 4 is embedded in the guardrails 612. The entire first filter device 6 is set below the trench cover plate 4, which allows the invention to be hidden under the road 1, so as not to obstruct the movement of pedestrians and to ensure the aesthetics of the city.

[0034] like Figure 3 and Figure 4 As shown, the first filtration device 6 includes a filter plate 61, a filter groove 62, a first filter screen 63, and a cover plate 64. There are two filter grooves 62, which are respectively located inside the filter plate 61. The two filter grooves 62 are symmetrically distributed along the central axis of the length direction of the filter plate 61. The first filter screen 63 is located at the bottom of the filter groove 62, and the cover plate 64 is located above the first filter screen 63. The ends of the two filter grooves 62 that are close to each other are inclined from top to bottom towards the central axis of the length direction of the filter plate 61.

[0035] Specifically, such as Figure 4As shown, the two filter tanks 62 respectively include a first ring 621, a second ring 622 and a circular base 623. The circular base 623, the second ring 622 and the first ring 621 are distributed from the inside to the outside. The first ring 621 is located above the second ring 622 and the second ring 622 is located above the circular base 623. The circular base 623 has an opening, and the first filter screen 63 is located in the opening. The filter tank 62 has a first seepage hole 624 and a second seepage hole 625. The ends of the first ring 621 and the second ring 622 away from the first seepage hole 624 are inclined from top to bottom towards the central axis of the length direction of the filter plate 61. The bottom of the inclined ends of the first ring 621 and the second ring 622 are on the same horizontal plane as the cover plate 64.

[0036] The filter tank 62 is composed of three parts: a first ring 621, a second ring 622, and a circular base 623, each forming a certain height difference. At the same time, the first ring 621 and the second ring 622 are provided with inclined ends, so that the entire filter tank 62 forms a flow guiding structure, which accelerates the flow of rainwater, effectively prevents garbage from accumulating, and also prevents garbage from clogging the seepage holes.

[0037] like Figure 5 As shown, a first side 626, a second side 627, and a third side 628 are respectively provided between the first ring 621 and the filter plate 61, between the second ring 622 and the first ring 621, and between the second ring 622 and the circular base 623. A first seepage hole 624 is provided at the ends of the two filter tanks 62 that are far apart from each other. The first seepage hole 624 is arranged in an arc shape. The first seepage hole 624 is respectively provided between the first side 626 and the first ring 621, and between the second side 627 and the second ring 622. A second seepage hole 625 is provided at the ends of the two filter tanks 62 that are close to each other. The second seepage hole 625 is arranged in a circle. The second seepage hole 625 is respectively provided on the bottom of the inclined ends of the first ring 621 and the second ring 622.

[0038] like Figure 5 As shown, the first infiltration hole 624 is arc-shaped. The arc shape allows for a wide range of water infiltration when rainwater flows. When the amount of rainwater is small, rainwater can seep in through the first infiltration hole 624. The first infiltration holes 624 are respectively located between the first side 626 and the first ring 621, and between the second side 627 and the second ring 622. Once the rainwater does not flow along the guide structure of the inclined end to the center of the filter plate 61, the rainwater may flow from the first ring 621 through the second side to the second ring. At this time, the first infiltration hole 624 located between the second side 627 and the second ring 622 can also seep in the rainwater.

[0039] The second infiltration hole 625 is circular. When rainwater flows through the guide structure at the inclined end, the second infiltration hole 625 is located at the bottom of the inclined end of the first ring 621 and the second ring 622 respectively. Because the second infiltration hole 625 is located at the lowest end of the inclined end and is on the same horizontal plane as the cover plate 64, rainwater will flow into the second infiltration hole 625. The circular design can effectively prevent rainwater from accumulating.

[0040] like Figure 6 As shown, the first filter screen 63 is fan-shaped and symmetrically distributed along the central axis of the circular base 623. A rotary motor 611 is provided inside the filter plate 61. The rotary motor 611 is located at the end of the filter plate 61 away from the second seepage hole 625 in the width direction. The rotary motor 611 is connected to the cover plate 64. The cover plate 64 can rotate along the central axis of the circular base 623. The shape of the cover plate 64 is consistent with the shape of the first filter screen 63. A rotating shaft 641 is provided at the center of the cover plate 64. A shaft 643 is provided at the center of the circular base 623. A bearing 642 matching the shaft 643 is provided between the rotating shaft 641 and the shaft 643.

[0041] The rotary motor 611 is used to control the rotation of the cover plate 64. The shape of the cover plate 64 is consistent with the shape of the first filter screen 63, so that the cover plate 64 can cover the first filter screen 63 well, preventing rainwater from flowing into the drainage ditch 5 through the first filter screen 63. A rotating shaft 641, a bearing 642 and a shaft 643 are provided between the cover plate 64 and the circular base 623, and are driven by the rotary motor 611, which can make the rotation of the cover plate 64 smoother and can deal with heavy rain in time.

[0042] When the rainfall is light, rainwater can flow into the drainage ditch 5 through the first infiltration hole 624 or the second infiltration hole 625. The openings of the first infiltration hole 624 and the second infiltration hole 625 are small, which can prevent garbage from entering the drainage ditch 5. When the rainfall is heavy, the cover plate 64 is opened, and the rainwater enters the drainage ditch 5 through the first filter screen 63. The first filter can block garbage and large particles of impurities in the water from entering the drainage ditch 5.

[0043] The second filter device 7 is located at the bottom of the drainage ditch 5. The second filter device 7 is equipped with a second filter screen. The top of the drainage ditch 5 is connected to the bottom of the filter plate 61. The side of the drainage ditch 5 is set with an incline. The bottom of the drainage ditch 5 is provided with an inclined block 72. The inclined block 72 is located at both ends of the drainage ditch 5 along the length direction of the filter plate 61. The drainage box 8 is located below the inclined block 72. The second filter screen is located at the top of the drainage box 8.

[0044] The bottom of the second filter device 7 is provided with a sloping block 72 that can guide the rainwater entering through the first seepage hole 624, so that the rainwater can be concentrated on the second filter screen. The function of the second filter screen is to filter and isolate small particulate impurities in the rainwater, and together with the first filter device 6, achieve a water purification effect.

[0045] The water storage device 3 includes a water storage tank, a pumping pipe, and a pumping motor. The water storage tank is located below the road 1 and is connected to the drainage tank 8 via a pipe. The bottom end of the pumping pipe is located inside the water storage tank, and the top end of the pumping pipe is located above the road 1 and connected to the pumping motor. Rainwater transported from the drainage device 2 is stored in the water storage device 3. When needed, the rainwater in the water storage tank can be pumped out and utilized using the pumping pipe and the pumping motor.

[0046] The following are preferred embodiments of the present invention.

[0047] Example 1:

[0048] This invention relates to a road drainage structure based on sponge city design, including drainage equipment 2 excavated on both sides of the road 1 and water storage equipment 3 connected to the drainage equipment 2. The drainage equipment 2 includes a ditch cover plate 4, a drainage ditch 5, a first filter device 6, a second filter device 7 and a drainage tank 8. The drainage ditch 5 is located under the road 1. The top of the drainage ditch 5 is provided with a ditch cover plate 4. The first filter device 6 is provided below the ditch cover plate 4. The bottom of the drainage ditch 5 is provided with a second filter device 7. The drainage tank 8 is provided below the drainage ditch 5.

[0049] In this embodiment, the height difference between the first ring 621 and the filter plate 61 is between one-fifth and one-third of the thickness of the filter plate 61, and preferably the height difference between the first ring 621 and the filter plate 61 and the height difference between the second ring 622 and the first ring 621 are the same.

[0050] When the height difference between the first ring 621 and the filter plate 61, and the height difference between the second ring 622 and the first ring 621 are the same, it is more conducive to the drainage of the first seepage hole 624. When the height difference between the first ring 621 and the filter plate 61 is less than one-fifth of the thickness of the filter plate 61, it will cause the height difference between the circular base 623 and the second ring 622 or the thickness of the circular base 623 to be too large. The former will cause an excessive height difference between the first filter and the second seepage hole 625. Once the second seepage hole 625 cannot drain water in time, rainwater will flow into the first filter screen 63 and accumulate. The latter will reduce the matching degree between the circular base 623 and the first filter screen 63, which will easily lead to the damage of the first filter screen 63.

[0051] When the height difference between the first ring 621 and the filter plate 61 is greater than one-third of the thickness of the filter plate 61, it will infinitely compress the height difference between the circular base 623 and the second ring 622 and the thickness of the circular base 623. The cover plate 64 and the second seepage hole 625 are on the same water surface. When the height difference between the circular base 623 and the second ring 622 is compressed to a very small value, the angle of the inclined end of the entire filter tank 62 is insufficient, which will slow down the flow of rainwater. When the thickness of the circular base 623 is compressed to a very small value, the matching degree between the circular base 623 and the first filter screen 63 will also decrease, and gaps will be generated between the first filter screen 63 and the circular base 623, reducing the filtration effect.

[0052] Example 2:

[0053] Its composition is the same as that of Case 1, so I will not go into detail here. The difference is:

[0054] In this embodiment, the diameter of the circular base 623 is between three-fifths and two-fifths of the outer diameter of the first ring 621, and preferably the widths of the first ring 621 and the second ring 622 are the same.

[0055] When the widths of the first ring 621 and the second ring 622 are the same, it is more conducive to the drainage of the first seepage hole 624 and the diversion of rainwater. The diameter of the circular base 623 is less than three-fifths of the outer diameter of the first ring 621, which will result in the area of ​​the first filter screen 63 being too small. In the case of heavy rain, it will not be conducive to the drainage of rainwater and will easily cause water accumulation on the road 1. At the same time, the widths of the first ring 621 and the second ring 622 will be relatively large, and rainwater will easily remain on the ring bands of the first ring 621 and the second ring 622.

[0056] The diameter of the circular base 623 is more than two-fifths of the outer diameter of the first ring 621. The width of the first ring 621 and the second ring 622 will be relatively small. Rainwater can easily enter the circular base 623 through the second side and the third side, thus preventing rainwater from entering the second seepage hole 625 from the inclined end. When the amount of rainwater is small, the cover plate 64 is closed, and the rainwater will accumulate on the circular base 623 after entering it.

[0057] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A road drainage structure based on sponge city design, characterized in that, The drainage equipment (2) is excavated on both sides of the road (1) and the water storage equipment (3) is connected to the drainage equipment (2). The drainage equipment (2) includes a ditch cover plate (4), a drainage ditch (5), a first filter device (6), a second filter device (7) and a drainage box (8). The drainage ditch (5) is located below the road (1). The top of the drainage ditch (5) is provided with a ditch cover plate (4). The first filter device (6) is provided below the ditch cover plate (4). The bottom of the drainage ditch (5) is provided with a second filter device (7). The drainage box (8) is provided below the drainage ditch (5). The first filtration device (6) includes a filter plate (61), a filter groove (62), a first filter screen (63), and a cover plate (64). There are two filter grooves (62), which are respectively located inside the filter plate (61). The two filter grooves (62) are symmetrically distributed along the central axis of the length direction of the filter plate (61). The first filter screen (63) is located at the bottom of the filter groove (62). The cover plate (64) is located above the first filter screen (63). The ends of the two filter grooves (62) that are close to each other are inclined from top to bottom towards the central axis of the length direction of the filter plate (61). The two filter tanks (62) each include a first ring (621), a second ring (622), and a circular base (623). The circular base (623), the second ring (622), and the first ring (621) are distributed from the inside out. The first ring (621) is located above the second ring (622), and the second ring (622) is located above the circular base (623). The circular base (623) has an opening, and the first filter screen (63) is located inside the opening. The filter tank (62) has a first seepage hole (624) and a second seepage hole (625). The first seepage hole (624) is located at the end of the two filter tanks (62) that is far apart from each other, and the second seepage hole (625) is located at the end of the two filter tanks (62) that is close to each other.

2. The road drainage structure based on sponge city design according to claim 1, characterized in that, A first side (626), a second side (627), and a third side (628) are respectively provided between the first ring (621) and the filter plate (61), between the second ring (622) and the first ring (621), and between the second ring (622) and the circular base (623). The first water seepage hole (624) is arranged in an arc shape. The first water seepage hole (624) is respectively provided between the first side (626) and the first ring (621), and between the second side (627) and the second ring (622).

3. The road drainage structure based on sponge city design according to claim 1, characterized in that, The ends of the first ring (621) and the second ring (622) away from the first seepage hole (624) are inclined from top to bottom toward the central axis of the filter plate (61) along its length. The bottom of the inclined ends of the first ring (621) and the second ring (622) are on the same horizontal plane as the cover plate (64). The second seepage hole (625) is circular and is located on the bottom of the inclined ends of the first ring (621) and the second ring (622).

4. The road drainage structure based on sponge city design according to claim 1, characterized in that, The water storage device (3) includes a water storage tank (31), a water pumping pipe (32) and a water pumping motor (33). The water storage tank (31) is located below the road (1). The water storage tank (31) is connected to the drainage tank (8) through a pipe. The bottom end of the water pumping pipe (32) is located inside the water storage tank (31). The top end of the water pumping pipe (32) is located above the road (1) and is connected to the water pumping motor (33).

5. The road drainage structure based on sponge city design according to claim 1, characterized in that, The first filter screen (63) is fan-shaped and symmetrically distributed along the central axis of the circular base (623). A rotary motor (611) is provided inside the filter plate (61). The rotary motor (611) is located at the end of the filter plate (61) away from the second seepage hole (625) in the width direction. The rotary motor (611) is connected to the cover plate (64). The cover plate (64) can rotate along the central axis of the circular base (623).

6. The road drainage structure based on sponge city design according to claim 1, characterized in that, The shape of the cover plate (64) is consistent with the shape of the first filter screen (63). The center of the cover plate (64) is provided with a rotating shaft (641), and the center of the circular base plate (623) is provided with a shaft (643). A bearing (642) matching the shaft (643) is provided between the rotating shaft (641) and the shaft (643).

7. The road drainage structure based on sponge city design according to claim 1, characterized in that, The second filter device (7) is located at the bottom of the drainage ditch (5). The second filter device (7) is provided with a second filter screen (71). The top of the drainage ditch (5) is connected to the bottom of the filter plate (61). The side of the drainage ditch (5) is set with an incline. The bottom of the drainage ditch (5) is provided with an inclined block (72). The inclined block (72) is located at both ends of the drainage ditch (5) along the length direction of the filter plate (61). The drainage box (8) is located below the inclined block (72). The second filter screen (71) is located at the top of the drainage box (8).

8. The road drainage structure based on sponge city design according to claim 1, characterized in that, The trench cover (4) has several through holes (41) arranged evenly along the width of the trench cover (4). The filter plate (61) is provided with guardrails (612) extending upward around it, and the trench cover (4) is embedded in the guardrails (612).

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