A garden drainage system for sponge city

Abstract

The present invention relates to the technical field of urban drainage, and discloses a garden drainage system for a sponge city, which includes a surface permeable layer, a subsurface permeable layer and a collecting pipe arranged from top to bottom. One end of the collecting pipe is communicated with a water storage tank buried underground. The top of the collecting pipe is provided with a water inlet, and a filter screen is arranged in the water inlet. A connecting shaft is rotatably installed inside the collecting pipe, and a plurality of connecting rods are fixedly installed on the connecting shaft; by setting an adjusting component based on the characteristics of a thermal expansion column, the present invention utilizes the expansion and contraction power generated by the thermal expansion column with the change of the ambient temperature to drive the rotation of the connecting shaft, and then drives the cleaning rod to clean the inner wall of the lower half of the collecting pipe. This design can automatically perform the cleaning operation according to the natural fluctuation of the underground temperature, accurately target the areas prone to scaling and blockage, and effectively avoid the high cost disadvantages caused by the deep burial of the collecting pipe in the traditional manual cleaning method, and solve the problem of difficult maintenance of the collecting pipe from the root cause.

Description

Technical Field

[0001] The present invention relates to the technical field of urban drainage, and specifically to a garden drainage system for sponge cities. Background Art

[0002] A sponge city refers to a urban development mode that, by strengthening urban planning, construction and management, gives full play to the ecological systems of buildings, roads, green spaces, water systems, etc. to absorb, store and slow down rainwater, effectively control rainwater runoff, and achieve natural accumulation, natural infiltration and natural purification. A sponge city can absorb, store, infiltrate and purify rainwater when it rains, and "release" and utilize the stored water when needed. It has good "elasticity" like a sponge, which helps to solve problems such as urban waterlogging and rainwater runoff pollution. At the same time, it can save water resources, improve the functions of the urban ecological system and reduce the interference to the natural ecological environment.

[0003] Chinese Patent CN213682032U discloses a drainage structure, including a water injection pump and a water injection pipe; the lower end of the water injection pipe extends downward to the permeable layer area below the ground surface; one end of the water injection pump is connected to surface water accumulation or storage, and the other end is connected to the water injection pipe for injecting water into the permeable layer area through the water injection pipe. This solution also provides a sponge city water storage and drainage system, including the drainage structure as described above. The drainage structure and the sponge city water storage and drainage system adopting the above technical solutions can inject accumulated water or stored water into the underground permeable layer through the water injection pump. Since the permeable layer has strong water permeability, it helps to quickly drain the accumulated water or stored water; in addition, the rainwater is pollution-free, and after being injected into the permeable layer, it can supplement the groundwater and at the same time helps to solve the problem of ground settlement.

[0004] As shown in the above patent, most of the current common sponge city drainage systems are to set permeable layers on the ground and underground to make rainwater naturally infiltrate into the ground, and then collect the rainwater that has penetrated into the ground with a collecting pipe and transport it to the water storage area. When there is a water demand, water is pumped from the water storage area for use. However, this traditional method has obvious drawbacks. The collecting pipe is usually buried deep underground, and the purity of the rainwater infiltrating into the ground is relatively low. The collecting pipe is extremely prone to forming scale during long-term use, and even cause blockage in severe cases. And because the collecting pipe is buried deep underground, once a problem occurs, the cleaning work is extremely difficult and requires a large amount of manpower, material resources and time costs.

[0005] Therefore, it is necessary to provide a garden drainage system for sponge cities to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a garden drainage system for sponge cities, which can automatically perform cleaning operations according to the natural fluctuations of underground temperature, accurately target areas prone to scaling and blockage, and effectively avoid the high-cost disadvantages caused by the deep burial of collecting pipes in the traditional manual cleaning method.

[0007] The above technical object of the present invention is achieved through the following technical solutions: A garden drainage system for sponge cities includes a surface permeable layer, a subsurface permeable layer, and a collecting pipe arranged from top to bottom. One end of the collecting pipe is communicated with a storage pool buried underground. An inlet is opened at the top of the collecting pipe, and a filter screen is arranged in the inlet. A connecting shaft is rotatably installed inside the collecting pipe. A plurality of connecting rods are fixedly installed on the connecting shaft. One end of the connecting rod away from the connecting shaft is fixedly installed with a cleaning rod, and the cleaning rod is in contact with the inner peripheral wall of the collecting pipe. An adjusting component for driving the connecting shaft to rotate is arranged on the collecting pipe. The adjusting component includes a support cylinder and a thermal expansion column arranged inside the support cylinder. The adjusting component drives the connecting shaft to rotate through the power of the telescopic thermal expansion column.

[0008] The further setting of the present invention is: The adjusting component further includes a slider slidably installed in the support cylinder and a driving rod fixedly connected to the bottom wall of the slider. The bottom end of the thermal expansion column is fixedly connected to the slider. The driving rod penetrates the bottom wall of the support cylinder, and the driving rod is slidably matched with the support cylinder.

[0009] The further setting of the present invention is: The top end of the support cylinder is threadedly installed with a top cover. A connecting bolt is arranged through the top of the support cylinder, and the connecting bolt is threadedly connected to the support cylinder. The connecting bolt penetrates the top of the thermal expansion column.

[0010] The further setting of the present invention is: A gear is fixedly sleeved at the end of the connecting shaft. A first connecting plate is fixedly installed at the bottom end of the driving rod. A rack meshing with the gear is fixedly connected to the bottom end of the first connecting plate.

[0011] The further setting of the present invention is: A support frame is arranged inside the collecting pipe. A mounting seat is fixedly installed at the top end of the support frame. A plurality of cleaning needles are fixedly installed at the top end of the mounting seat. A plurality of rectangular mesh holes are arranged on the filter screen. The top ends of the cleaning needles extend into the rectangular mesh holes. A transmission component for driving the cleaning needles to move in a wavy line trajectory in the horizontal plane is arranged inside the collecting pipe.

[0012] A further setting of the present invention is that: the transmission assembly includes an adjusting plate fixedly arranged in the middle of the support frame, an inclined plate for driving the longitudinal movement of the adjusting plate, and a corrugated plate for driving the transverse movement of the adjusting plate. The adjusting plate is provided with a transverse through groove and a longitudinal through groove. The inclined plate penetrates through the transverse through groove, and the corrugated plate penetrates through the longitudinal through groove. The width of the transverse through groove is greater than the width of the inclined plate, and the width of the longitudinal through groove is greater than the width of the corrugated plate.

[0013] A further setting of the present invention is that: a second connecting plate is fixedly installed on the side wall of the first connecting plate, and the bottom ends of the inclined plate and the corrugated plate are both fixedly connected to the second connecting plate.

[0014] A further setting of the present invention is that: two first rollers are rotatably installed in the transverse through groove, and both first rollers are in contact with the inclined plate. Two second rollers are rotatably installed in the longitudinal through groove, and both second rollers are in contact with the corrugated plate.

[0015] A further setting of the present invention is that: support seats are fixedly installed at the four corners of the support frame. A rectangular through groove is provided inside the support seat. A connecting column is arranged in the rectangular through groove. The top end of the connecting column is fixedly connected to the inner wall of the water collecting pipe. Two limiting plates are fixedly installed on the connecting column. The top wall and the bottom wall of the support seat are respectively in contact with the two limiting plates, and the support seat is slidably matched with the limiting plates.

[0016] A further setting of the present invention is that: a water intake is communicatedly arranged at the top end of the water storage pool, and an overflow port is arranged at the top of the pool wall of the water storage pool.

[0017] In summary, the present invention has the following beneficial effects:

[0018] 1. By setting an adjusting component based on the characteristics of the thermal expansion column, the present invention utilizes the expansion and contraction power generated by the thermal expansion column with the change of the ambient temperature to drive the connecting shaft to rotate, and then drives the cleaning rod to clean the inner wall of the lower half of the water collecting pipe. This design can automatically perform the cleaning operation according to the natural fluctuation of the underground temperature, accurately target the areas prone to fouling and blockage, and effectively avoid the high cost disadvantage caused by the deep burial of the water collecting pipe in the traditional manual cleaning method, fundamentally solving the problem of difficult maintenance of the water collecting pipe.

[0019] 2. The present invention constructs a transmission assembly composed of an inclined plate, a corrugated plate, etc. This transmission assembly uses the power of the driving rod to move up and down to drive the adjusting plate to drive the cleaning needle to move in a wavy line trajectory on the filter screen. Compared with the traditional cleaning method, this design significantly expands the movement range of the cleaning needle, greatly improves the cleaning effect on the dirt of the filter screen, effectively solves the problem that the filter screen is prone to blockage and affects the drainage efficiency due to the limited cleaning range in the traditional cleaning method, effectively guarantees the long-term stable operation of the drainage system, and ensures the high efficiency and reliability of the entire sponge city drainage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is a schematic structural diagram of the water collecting pipe and the adjusting assembly of the present invention;

[0022] Figure 3 is Figure 2 an enlarged structural diagram of part A of;

[0023] Figure 4 is a sectional structural diagram of the water collecting pipe of the present invention;

[0024] Figure 5 is Figure 4 an enlarged structural diagram of part B of;

[0025] Figure 6 is a schematic structural diagram of the support frame and the cleaning needle of the present invention;

[0026] Figure 7 is Figure 6 an enlarged structural diagram of part C of;

[0027] Figure 8 is a schematic structural diagram of the adjusting assembly of the present invention;

[0028] Figure 9 is a schematic structural diagram of the inclined plate, the corrugated plate and the second connecting plate of the present invention;

[0029] Figure 10 is a schematic structural diagram of the cleaning rod, the connecting shaft and the gear of the present invention;

[0030] Figure 11 is a schematic structural diagram of the support seat, the adjusting plate and the connecting column of the present invention.

[0031] In the figure: 1, surface permeable layer; 2, underground permeable layer; 3, water collecting pipe; 301, water inlet; 4, water storage tank; 401, water intake; 402, overflow port; 5, adjusting assembly; 501, support cylinder; 502, slider; 503, driving rod; 504, thermal expansion column; 505, connecting bolt; 506, top cover; 6, connecting seat; 7, connecting shaft; 8, gear; 9, connecting rod; 10, cleaning rod; 11, first connecting plate; 12, rack; 13, filter screen; 14, cleaning needle; 15, support frame; 16, mounting seat; 17, connecting column; 18, limiting plate; 19, support seat; 1901, rectangular through groove; 20, adjusting plate; 2001, transverse through groove; 2002, longitudinal through groove; 21, first roller; 22, second roller; 23, second connecting plate; 24, inclined plate; 25, corrugated plate. DETAILED DESCRIPTION OF THE INVENTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] Please refer to Figures 1 to 10, in the embodiments of the present invention, a garden drainage system for a sponge city includes a surface permeable layer 1, a subsurface permeable layer 2, and a collecting pipe 3 arranged from top to bottom. The surface permeable layer 1 is made of permeable bricks, grass-planting bricks, permeable concrete ground, etc., with a porosity ≥ 20%, which can quickly infiltrate medium and small rainfall. These materials have good water permeability and can allow rainwater to quickly infiltrate, effectively alleviating the problem of surface water accumulation. The subsurface permeable layer 2 is made of permeable concrete and is provided with gravel, geotextiles, etc. for filtration. One end of the collecting pipe 3 is connected to a water storage tank 4 buried underground. The volume of the water storage tank 4 is designed according to the catchment area, and a water quality purification module can be provided inside. The top of the collecting pipe 3 is provided with a water inlet 301, and a filter screen 13 is arranged inside the water inlet 301. The aperture of the filter screen 13 is 3mm × 3mm. A connecting shaft 7 is rotatably installed inside the collecting pipe 3. The connecting shaft 7 is located at the axis of the collecting pipe 3. A connecting seat 6 is fixedly installed on the inner wall of the collecting pipe 3. The connecting shaft 7 passes through the connecting seat 6, and the connecting shaft 7 is rotatably connected to the connecting seat 6, thereby realizing the installation of the connecting shaft 7. A plurality of connecting rods 9 are fixedly installed on the connecting shaft 7. One end of the connecting rod 9 away from the connecting shaft 7 is fixedly installed with a cleaning rod 10. The cleaning rod 10 is in contact with the inner peripheral wall of the collecting pipe 3. There are three cleaning rods 10, and the heights of the three cleaning rods 10 are all lower than the height of the axis line of the collecting pipe 3. The included angle between adjacent two connecting rods 9 is 30° - 55°. An adjusting component 5 for driving the connecting shaft 7 to rotate is arranged on the collecting pipe 3. The adjusting component 5 includes a support cylinder 501 and a thermal expansion column 504 arranged inside the support cylinder 501. The thermal expansion column 504 is made of a thermal expansion material. The thermal expansion column 504 elongates after heating and contracts after cooling. The adjusting component 5 drives the connecting shaft 7 to rotate through the power of the expansion and contraction of the thermal expansion column 504;During rainfall, rainwater seeps into the underground permeable layer 2 through the surface permeable layer 1, then enters the collecting pipe 3 through the water inlet 301 opened on the collecting pipe 3, and is then discharged into the storage tank 4 for collection. Before installation, the local underground temperature is monitored to detect the fluctuation range of the underground temperature. By equipping a thermal expansion column 504 with an appropriate length, the rotation range of the connecting shaft 7 is between -60° and 60°, so that the cleaning rod 10 can clean the inner wall of the lower half of the collecting pipe 3 when it rotates. It should be noted that during use, the probability of the inner wall of the upper half of the collecting pipe 3 coming into contact with rainwater is relatively small, so generally no cleaning is required. During the use process, as the temperature changes, the thermal expansion column 504 expands and contracts, and then the connecting shaft 7 rotates. When the connecting shaft 7 rotates, it drives the cleaning rod 10 to rotate through the connecting rod 9, thereby cleaning the inner wall of the collecting pipe 3. It can automatically drive the cleaning rod 10 to move to clean the collecting pipe 3 when the underground temperature changes, making clever use of the natural factor of environmental temperature change. Without additional energy input, the automatic rotation and cleaning of the cleaning rod 10 can be achieved, which is both energy-saving and environmentally friendly, and reduces the maintenance cost of the system. There is no need for manual cleaning or the use of an electrical driving structure for cleaning, reducing the production cost and use cost.

[0034] In this embodiment, preferably, the adjusting assembly 5 further includes a slider 502 slidably installed in the support cylinder 501 and a driving rod 503 fixedly connected to the bottom wall of the slider 502. The bottom end of the thermal expansion column 504 is fixedly connected to the slider 502. The driving rod 503 penetrates the bottom wall of the support cylinder 501, and the driving rod 503 is slidably matched with the support cylinder 501, ensuring that the expansion and contraction of the thermal expansion column 504 can be accurately transmitted to the driving rod 503, driving the driving rod 503 to move up and down stably. The top end of the support cylinder 501 is threadedly installed with a top cover 506. The top of the support cylinder 501 is provided with a connecting bolt 505, and the connecting bolt 505 is threadedly connected to the support cylinder 501. The connecting bolt 505 penetrates the top of the thermal expansion column 504. After opening the top cover 506, the connecting bolt 505 can be unscrewed, and the thermal expansion column 504 can be pushed up and down manually, so as to actively drive the cleaning rod 10 to rotate to clean the collecting pipe 3. When the external environmental temperature rises, the thermal expansion column 504 elongates, thereby driving the driving rod 503 to move downward through the slider 502. When the external environmental temperature drops, the thermal expansion column 504 contracts, thereby driving the driving rod 503 to move upward through the slider 502.

[0035] In this embodiment, preferably, a gear 8 is fixedly sleeved at the end of the connecting shaft 7, and a first connecting plate 11 is fixedly installed at the bottom end of the driving rod 503. A rack 12 meshing with the gear 8 is fixedly connected to the bottom end of the first connecting plate 11. When the driving rod 503 moves up and down, it can move up and down through the first connecting plate 11, thereby driving the gear 8 to rotate. Furthermore, a plurality of connecting rods 9 are driven to rotate through the connecting shaft 7, so that the cleaning rod 10 rotates along the inner wall of the water collecting pipe 3 to clean the inner wall of the water collecting pipe 3.

[0036] In this embodiment, preferably, a water intake 401 is communicated with the top end of the water storage tank 4, and an overflow port 402 is arranged at the top of the pool wall of the water storage tank 4. The overflow port 402 is communicated with a drainage channel, a river channel, etc. The overflow port 402 is provided to prevent the water storage tank 4 from being damaged due to excessive water level in extreme weather such as heavy rain, to ensure the safe operation of the water storage tank 4. At the same time, the excess rainwater is discharged into the drainage channel or the river channel, which can also maintain the balance of the entire urban water system. The water intake 401 facilitates the reuse of the stored rainwater in the later stage, such as for garden irrigation, road flushing, etc., to improve the utilization efficiency of water resources, which conforms to the concept of water resource recycling in the sponge city.

[0037] Please refer to Figures 2 to 11 , in the embodiment of the present invention, a support frame 15 is arranged inside the water collecting pipe 3. A mounting seat 16 is fixedly installed at the top end of the support frame 15. The cross section of the mounting seat 16 is a triangular structure, so that the rainwater dripping on the mounting seat 16 can quickly flow downward along the inclined surface of the mounting seat 16. A plurality of cleaning needles 14 are fixedly installed at the top end of the mounting seat 16. A plurality of rectangular mesh holes are arranged on the filter screen 13. The top ends of the cleaning needles 14 extend into the rectangular mesh holes. A transmission assembly for driving the cleaning needles 14 to move in a wavy line trajectory in the horizontal plane is arranged in the water collecting pipe 3.

[0038] In this embodiment, preferably, the transmission assembly includes an adjusting plate 20 fixedly arranged in the middle of the support frame 15, an inclined plate 24 for driving the longitudinal movement of the adjusting plate 20, and a corrugated plate 25 for driving the transverse movement of the adjusting plate 20. A transverse through groove 2001 and a longitudinal through groove 2002 are formed in the adjusting plate 20. The inclined plate 24 penetrates through the transverse through groove 2001, and the corrugated plate 25 penetrates through the longitudinal through groove 2002. The width of the transverse through groove 2001 is greater than the width of the inclined plate 24, and the width of the longitudinal through groove 2002 is greater than the width of the corrugated plate 25, so that when the adjusting plate 20 moves transversely, the inclined plate 24 will not cause interference, and when the adjusting plate 20 moves longitudinally, the corrugated plate 25 will not cause interference. The corrugated structure of the corrugated plate 25 enables the adjusting plate 20 to move in a wavy trajectory on the horizontal plane under the cooperation of the inclined plate 24 and the corrugated plate 25, providing a power basis for the efficient cleaning of the cleaning needle 14; a second connecting plate 23 is fixedly installed on the side wall of the first connecting plate 11, and the bottom ends of the inclined plate 24 and the corrugated plate 25 are both fixedly connected to the second connecting plate 23; two first rollers 21 are rotatably installed in the transverse through groove 2001, and both of the two first rollers 21 are in contact with the inclined plate 24. Two second rollers 22 are rotatably installed in the longitudinal through groove 2002, and both of the two second rollers 22 are in contact with the corrugated plate 25. The arrangement of the first rollers 21 and the second rollers 22 can, on the one hand, reduce the friction force when the inclined plate 24 and the corrugated plate 25 move, making their movement smoother, and on the other hand, also ensure the stability of the inclined plate 24 and the corrugated plate 25 during the movement, thereby ensuring the accuracy of the movement of the adjusting plate 20; when the driving rod 503 drives the first connecting plate 11 to move up and down, the first connecting plate 11 drives the inclined plate 24 and the corrugated plate 25 to move up and down through the second connecting plate 23. When the inclined plate 24 moves up and down, it drives the adjusting plate 20 to move longitudinally. When the corrugated plate 25 moves up and down, it drives the adjusting plate 20 to move transversely back and forth, so that the adjusting plate 20 moves in a wavy trajectory on the horizontal plane. Furthermore, the support frame 15 drives the cleaning needle 14 to move in a wavy trajectory in the rectangular mesh holes through the mounting seat 16, thereby effectively cleaning the filter screen 13. Compared with the traditional method of cleaning by moving the cleaning needle 14 up and down, the range of movement of the cleaning needle 14 in the rectangular mesh holes is larger, which can significantly improve the cleaning effect, prevent dirt in the water from adhering to the filter screen 13 and causing blockage, greatly improve the cleaning efficiency and quality of the filter screen 13, extend the service life of the filter screen 13, ensure the long-term stable operation of the drainage system, and the movement of the cleaning needle 14 is also driven by the expansion and contraction power of the thermal expansion column 504, without other driving sources, reducing the production cost and use cost.

[0039] In this embodiment, preferably, support seats 19 are fixedly installed at the four corners of the support frame 15. A rectangular through groove 1901 is formed inside the support seat 19. A connecting column 17 is arranged in the rectangular through groove 1901. The top end of the connecting column 17 is fixedly connected to the inner wall of the water collecting pipe 3. Two limiting plates 18 are fixedly installed on the connecting column 17. The top and bottom walls of the support seat 19 are respectively in contact with the two limiting plates 18, and the support seat 19 is slidably matched with the limiting plates 18. The support frame 15 is supported by the support seat 19 and the limiting plates 18. The arrangement of the rectangular through groove 1901 enables the support frame 15 to move slightly on the horizontal plane, which not only ensures that the support frame 15 can move slightly on the horizontal plane to adapt to the wavy movement of the adjusting plate 20, but also limits the movement range of the support frame 15 through the limiting plates 18, ensuring the stability and reliability of the structural operation.

[0040] Working principle: During use, as the temperature changes, the thermal expansion column 504 expands and contracts. When the external environmental temperature rises, the thermal expansion column 504 elongates, thereby driving the driving rod 503 to move downward through the slider 502. When the external environmental temperature drops, the thermal expansion column 504 contracts, thereby driving the driving rod 503 to move upward through the slider 502. When the driving rod 503 moves up and down, it can move up and down through the first connecting plate 11, thereby driving the gear 8 to rotate, and then driving a plurality of connecting rods 9 to rotate through the connecting shaft 7, so that the cleaning rod 10 rotates along the inner wall of the water collecting pipe 3 to clean the inner wall of the water collecting pipe 3.

[0041] Moreover, when the driving rod 503 drives the first connecting plate 11 to move up and down, the first connecting plate 11 drives the inclined plate 24 and the corrugated plate 25 to move up and down through the second connecting plate 23. When the inclined plate 24 moves up and down, it drives the adjusting plate 20 to move longitudinally. When the corrugated plate 25 moves up and down, it drives the adjusting plate 20 to move horizontally back and forth, so that the adjusting plate 20 moves in a wavy trajectory on the horizontal plane. Furthermore, the support frame 15 drives the cleaning needle 14 to move in a wavy trajectory in the rectangular mesh holes through the mounting seat 16, thereby effectively cleaning the filter screen 13. Compared with the traditional method of cleaning by moving the cleaning needle 14 up and down, the cleaning needle 14 has a larger movement range in the rectangular mesh holes, which can significantly improve the cleaning effect and prevent dirt in the water from adhering to the filter screen 13 and causing blockage.

[0042] The above is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made according to the structure, features, and principles described in the scope of this invention patent application are included in the scope of this invention patent application.

Claims

1. A garden drainage system for a sponge city, comprising a surface permeable layer, an underground permeable layer and a water collecting pipe arranged from top to bottom, one end of the water collecting pipe is connected to a water storage tank pre-buried underground, characterized in that: The top of the water collecting pipe is provided with a water inlet, and a filter screen is arranged inside the water inlet. A connecting shaft is rotatably installed inside the water collecting pipe. A plurality of connecting rods are fixedly installed on the connecting shaft. One end of the connecting rod away from the connecting shaft is fixedly installed with a cleaning rod, and the cleaning rod is in contact with the inner peripheral wall of the water collecting pipe. An adjusting component for driving the connecting shaft to rotate is arranged on the water collecting pipe. The adjusting component includes a support cylinder and a thermal expansion column arranged inside the support cylinder. The adjusting component drives the connecting shaft to rotate through the power of the telescopic thermal expansion column; The adjusting component further includes a slider slidably installed inside the support cylinder and a driving rod fixedly connected to the bottom wall of the slider. The bottom end of the thermal expansion column is fixedly connected to the slider. The driving rod penetrates through the bottom wall of the support cylinder, and the driving rod is slidably matched with the support cylinder; A gear is fixedly sleeved at the end of the connecting shaft. A first connecting plate is fixedly installed at the bottom end of the driving rod, and a rack meshing with the gear is fixedly connected to the bottom end of the first connecting plate; A support frame is arranged inside the water collecting pipe. A mounting seat is fixedly installed at the top end of the support frame. A plurality of cleaning needles are fixedly installed at the top end of the mounting seat. A plurality of rectangular mesh holes are arranged on the filter screen. The top ends of the cleaning needles extend into the rectangular mesh holes. A transmission component for driving the cleaning needles to move in a wavy line trajectory in the horizontal plane is arranged inside the water collecting pipe; The transmission component includes an adjusting plate fixedly arranged in the middle of the support frame, an inclined plate for driving the adjusting plate to move longitudinally, and a corrugated plate for driving the adjusting plate to move transversely. A transverse through groove and a longitudinal through groove are arranged on the adjusting plate. The inclined plate penetrates through the transverse through groove, and the corrugated plate penetrates through the longitudinal through groove. The width of the transverse through groove is greater than the width of the inclined plate, and the width of the longitudinal through groove is greater than the width of the corrugated plate; A second connecting plate is fixedly installed on the side wall of the first connecting plate. The bottom ends of the inclined plate and the corrugated plate are both fixedly connected to the second connecting plate.

2. The garden drainage system for a sponge city according to claim 1, wherein: The top end of the support cylinder is threadedly installed with a top cover. A connecting bolt is arranged through the top of the support cylinder, and the connecting bolt is threadedly connected with the support cylinder. The connecting bolt penetrates through the top of the thermal expansion column.

3. The garden drainage system for a sponge city according to claim 1, characterized in that: Two first rollers are rotatably installed in the transverse through groove, and both first rollers are in contact with the inclined plate. Two second rollers are rotatably installed in the longitudinal through groove, and both second rollers are in contact with the corrugated plate.

4. The garden drainage system for a sponge city according to claim 1, wherein: Support seats are fixedly installed at the four corners of the support frame. A rectangular through groove is arranged inside the support seat. A connecting column is arranged inside the rectangular through groove. The top end of the connecting column is fixedly connected to the inner wall of the water collecting pipe. Two limiting plates are fixedly installed on the connecting column. The top wall and the bottom wall of the support seat are respectively attached to the two limiting plates, and the support seat is slidably matched with the limiting plates.

5. A garden drainage system for a sponge city according to claim 1, characterized in that: A water intake is communicated with the top end of the water storage tank, and an overflow port is arranged at the top of the pool wall of the water storage tank.

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