Sponge city rainwater purification system

Abstract

The utility model relates to the technical field of rainwater purification equipment, in particular to a sponge city rainwater purification system which comprises a water collection tank, a filter frame is arranged in the water collection tank, a rainwater collection device, a rainwater drainage device and a solid dirt collection device are arranged on the water collection tank, and a sealing mechanism is arranged in the water collection tank. A cleaning device is installed in the water collecting tank and controls the solid dirt collecting device to be opened and closed through a sealing and storing mechanism. The sponge city rainwater purification system has the effect of improving the high efficiency of the sponge city rainwater purification system in the using process.

Description

Technical Field

[0001] This application relates to the technical field of rainwater purification equipment, and particularly to a sponge city rainwater purification system. Background Art

[0002] A sponge city is a new concept of urban rainwater management, aiming to enable the city to absorb, store, infiltrate and purify rainwater like a sponge through means of urban planning, construction and management, so as to adapt to environmental changes and cope with natural disasters brought by rainwater. When it rains, it can absorb, store, infiltrate and purify water, and release and utilize the stored water when needed. This urban development method not only helps to reduce urban flood disasters, but also promotes the resource utilization of rainwater and improves the urban ecological environment.

[0003] In life, the rainwater purification system is an important part of the sponge city. If rainwater is not filtered, it will carry impurities and sediment and directly flow into the rainwater well, causing a burden on the rainwater well. At the same time, it will also block the rainwater pipe, resulting in the loss of the function of the rainwater well. Therefore, it is necessary to treat the rainwater before it flows into the rainwater well to effectively reduce the waste of resources and save energy. Utility Model Content

[0004] In order to improve the efficiency of the sponge city rainwater purification system during use, this application provides a sponge city rainwater purification system.

[0005] This application provides a sponge city rainwater purification system, adopting the following technical solutions:

[0006] A sponge city rainwater purification system includes a collection water tank, a filter rack is arranged inside the collection water tank, a rainwater collection device, a rainwater discharge device, a water supply device and a solid waste collection device are respectively arranged on the collection water tank, a sealing mechanism is arranged inside the collection water tank, a cleaning device is installed inside the collection water tank, and the cleaning device controls the opening and closing of the solid waste collection device through the sealing mechanism.

[0007] By adopting the above technical solutions, the rainwater collection device is used to quickly collect rainwater and introduce it into the collection water tank, and the purified rainwater is discharged to the rainwater well by the rainwater discharge device to control the water storage volume inside the collection water tank, and is filtered and purified by the filter rack. When there is solid waste inside the collection water tank, the cleaning device pushes the solid waste close to the solid waste collection device, and drives the sealing mechanism to open the inlet of the solid waste collection device during the movement of the cleaning device, so that the solid waste can smoothly reach the solid waste collection device. After the collection is completed, the sealing mechanism closes the inlet of the solid waste collection device again, restricting the solid waste inside the solid waste collection device, which is beneficial to improving the efficiency of the sponge city rainwater purification system during use.

[0008] In a specific feasible implementation, the sealing mechanism includes a first limiting block, which is installed on the filter rack. A sliding rod is installed on the first limiting block. A second limiting block is installed at one end of the sliding rod away from the first limiting block. A first slider is installed on the sliding rod. A spring is sleeved on the sliding rod. One end of the spring is fixedly connected to the first limiting block, and the other end of the spring is fixedly connected to the first slider. A pushing block is installed on the first slider; a sliding rail is provided on the water collecting tank, and a second slider is slidably installed on the sliding rail. The second slider is connected to the pushing block. A connecting block is provided at one end of the second slider close to the solid waste collecting device. A baffle is installed on the connecting block, and the baffle is connected to the solid waste collecting device.

[0009] By adopting the above technical solution, the first slider slides on the sliding rod, driving the pushing block to push the second slider to realize the up and down movement of the baffle, so as to control the opening and closing of the solid waste collecting device. At the same time, the first limiting block and the second limiting block limit the displacement of the first slider in the length direction of the sliding rod, enabling the baffle to accurately open and close the inlet and outlet of the solid waste, which is beneficial to cleaning the solid waste inside the energy-saving drainage system.

[0010] In a specific feasible implementation, the connection mode between the pushing block and the second slider is a wedge-shaped abutment.

[0011] By adopting the above technical solution, using the wedge abutment method, when the pushing block moves forward, it will generate an upward thrust on the second slider, causing the second slider to slide upward along the sliding rail, and the control method is simple.

[0012] In a specific feasible implementation, the cleaning device includes a first motor, which is installed on the water collecting tank. A first rotating rod is installed on the water collecting tank. The output shaft of the first motor is fixedly connected to the first rotating rod. A second rotating rod is installed on the water collecting tank. Wheels are installed on both the first rotating rod and the second rotating rod. A conveyor belt is provided between the first rotating rod and the second rotating rod, and the conveyor belt is installed on the wheels; a first fixing plate is installed on the conveyor belt. A fixing rod is installed on the bottom surface of the first fixing plate. A second fixing plate is installed at one end of the fixing rod away from the first fixing plate. A pushing plate is installed on the second fixing plate.

[0013] By adopting the above technical solution, the first motor controls the rotation of the first rotating rod, driving the second rotating rod and the conveyor belt to rotate synchronously, so that the first fixing plate on the conveyor belt can move back and forth along with the conveyor belt. By using the second fixing plate to increase the contact area with the pushing plate, the pushing plate is stably installed and can smoothly move along with the first fixing plate in the conveying direction of the conveyor belt to clean the solid waste on the filter screen of the filter rack.

[0014] In a specific feasible implementation, the solid waste collection device includes a storage box, which is installed on the side wall of the water collection tank. The inside of the storage box is communicated with the water collection tank. The top of the storage box is provided with a box cover, and a handle is installed on the box cover. A filter frame is arranged inside the storage box; a second motor is installed on the side wall of the water collection tank, and a third rotating rod is installed on the water collection tank near the storage box. The output shaft of the second motor is fixedly connected to the third rotating rod. A fourth rotating rod is arranged near the filter rack, and the fourth rotating rod is installed on the water collection tank. A crawler is arranged between the fourth rotating rod and the third rotating rod.

[0015] By adopting the above technical solution, the second motor controls the rotation of the third rotating rod, drives the fourth rotating rod and the crawler to rotate synchronously, can transfer the solid waste in the water collection tank and drop it into the filter frame of the storage box, and the filter frame filters and temporarily stores it. By opening the box cover through the handle, the solid waste in the filter frame can be cleaned.

[0016] In a specific feasible implementation, the rainwater collection device includes a first flow expansion cover, which is communicated with the water collection tank, and one end of the first flow expansion cover far from the water collection tank is connected to the main water collection pipe.

[0017] By adopting the above technical solution, rainwater is collected in the main water collection pipe, and the rainwater in the main water collection pipe flows into the water collection tank through the first flow expansion cover in a larger range, increasing the flow performance inside the pipeline and facilitating the filtration and purification of rainwater.

[0018] In a specific feasible implementation, a water filtering hole is opened at a position near the bottom of the storage box on the side wall of the water collection tank, and the water filtering hole is communicated with the inside of the storage box.

[0019] By adopting the above technical solution, the filter frame collects solid waste and leaks the remaining rainwater. The remaining rainwater returns to the water collection tank through the water filtering hole, preventing water accumulation inside the storage box and facilitating the collection of solid waste.

[0020] In a specific feasible implementation, the rainwater discharge device includes a second connecting pipe, which is communicated with the water collection tank, and a drainage main pipe is connected to the second connecting pipe.

[0021] By adopting the above technical solution, the rainwater inside the water collection tank will quickly flow into the drainage main pipe through the second connecting pipe, which is beneficial to controlling the storage amount of domestic rainwater in the water collection tank.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The rainwater collection device is used to quickly collect rainwater and introduce it into the water collection tank. The purified rainwater is discharged into the rainwater well by the rainwater discharge device to control the water storage volume inside the water collection tank, and is purified through the filter rack. When there are solid contaminants inside the water collection tank, the cleaning device pushes the solid contaminants towards the solid contaminant collection device. During the movement of the cleaning device, it drives the sealing mechanism to open the entrance of the solid contaminant collection device, enabling the solid contaminants to smoothly reach the inside of the solid contaminant collection device. After the collection is completed, the sealing mechanism closes the entrance of the solid contaminant collection device again, restricting the solid contaminants inside the solid contaminant collection device, which is beneficial to improving the efficiency of the sponge city rainwater purification system during use.

[0024] 2. Through the setting of the sealing mechanism, the first slider slides on the sliding rod, driving the push block to push the second slider to move the baffle up and down, thereby controlling the opening and closing of the solid contaminant collection device. At the same time, the first limit block and the second limit block limit the displacement of the first slider in the length direction of the sliding rod, enabling the baffle to accurately open and close the entrance and exit of the solid contaminants, which is beneficial to cleaning the solid contaminants inside the energy-saving drainage system.

[0025] 3. Through the setting of the solid contaminant collection device, the second motor controls the third rotating rod to rotate, driving the fourth rotating rod and the track to rotate synchronously, which can convey the solid contaminants in the water collection tank and drop them into the filter frame of the storage box. The filter frame filters and temporarily stores them. By opening the box cover through the handle, the solid contaminants in the filter frame can be cleaned. Description of the Drawings

[0026] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.

[0027] Figure 2 is the schematic diagram of the water collection tank of the embodiment of the present application.

[0028] Figure 3 is the schematic diagram of the cleaning device of the embodiment of the present application.

[0029] Figure 4 is the schematic diagram of the solid contaminant collection device of the embodiment of the present application.

[0030] Figure 5 is the schematic diagram of the sealing mechanism reflecting the embodiment of the present application.

[0031] Reference signs: 1, water collecting tank; 11, filter rack; 12, filter screen; 13, water storage layer; 14, cleaning layer; 2, solid waste collection device; 211, storage box; 212, box cover; 213, handle; 22, hanging rod; 231, filter frame; 232, hanging ear; 241, second motor; 242, third rotating rod; 243, fourth rotating rod; 244, crawler; 25, water filtering hole; 3, cleaning device; 31, first motor; 321, first rotating rod; 322, second rotating rod; 323, runner; 324, conveyor belt; 33, first fixing plate; 34, fixing rod; 35, second fixing plate; 36, push plate; 4, rainwater collection device; 41, main water collection pipe; 42, first flow expansion cover; 5, rainwater discharge device; 51, main drainage pipe; 53, second connecting pipe; 7, sealing mechanism; 71, first limit block; 72, sliding rod; 73, second limit block; 741, first slider; 742, push block; 75, spring; 76, slide rail; 771, second slider; 772, connecting block; 78, baffle plate. Detailed implementation mode

[0032] The following further elaborates on this application in conjunction with the Figures 1-5 accompanying drawings.

[0033] The embodiment of this application discloses a rainwater purification system for sponge cities. Referring to Figure 1 , it includes a water collecting tank 1, a solid waste collection device 2 is arranged on the water collecting tank 1, a sealing mechanism 7 for restricting solid waste in the solid waste collection device 2 is arranged in the water collecting tank 1, a cleaning device 3 is arranged in the water collecting tank 1, and a rainwater collection device 4 and a rainwater discharge device 5 are respectively connected to the water collecting tank 1.

[0034] Rainwater in life is collected by the rainwater collection device 4 and flows into the water collecting tank 1. Through the internal treatment of the water collecting tank 1, the purification of rainwater is achieved. When the rainwater purification in the water collecting tank 1 is completed, the rainwater discharge device 5 discharges the rainwater into the rainwater well. When there is solid waste in the water collecting tank 1, the cleaning device 3 cleans the solid waste into the solid waste collection device 2, and the sealing mechanism 7 prevents the solid waste from returning to the inside of the water collecting tank 1, reducing the discharge of domestic rainwater and saving energy.

[0035] A filter rack 11 is fixedly installed in the water collecting tank 1, a filter screen 12 is installed on the filter rack 11, the filter rack 11 divides the water collecting tank 1 into two layers, the lower part of the filter rack 11 is a water storage layer 13, and the upper part of the filter rack 11 is a cleaning layer 14. A water inlet is opened on the side wall of one side of the water collecting tank 1, and the water inlet is arranged in the cleaning layer 14.

[0036] Rainwater enters through the water inlet and flows to the filter rack 11. After being filtered by the filter screen 12, solid contaminants in the rainwater such as fallen leaves and gravel are left on the cleaning layer 14, and the filtered water automatically flows into the water storage layer 13. The rainwater in the water storage layer 13 then flows into the rainwater well, which is beneficial for the collection of rainwater.

[0037] The rainwater collection device 4 includes a main water collection pipe 41, which can be connected to the sewer of urban rainwater or other pipes for initially collecting rainwater. One end of the main water collection pipe 41 close to the water collection tank 1 is fixedly connected with a first flow expansion cover 42, and the flow expansion port of the first flow expansion cover 42 is fixedly connected to the water inlet of the water collection tank 1.

[0038] Rainwater quickly converges into the main water collection pipe 41 and is expanded by the first flow expansion cover 42, enabling the rainwater to flow onto the filter screen 12 over a larger area, which is beneficial for the rapid filtration of domestic rainwater.

[0039] The rainwater discharge device 5 includes a main drainage pipe 51, the bottom end of which is connected to the rainwater well for storing rainwater. A second connecting pipe 53 is fixedly connected to the main drainage pipe 51 close to the water collection tank 1.

[0040] When there is purified rainwater inside the water collection tank 1, the rainwater flows into the main drainage pipe 51 through the second connecting pipe 53, facilitating the rapid discharge of rainwater and its collection in the rainwater well.

[0041] Refer to Figure 2 and Figure 3 As shown in [relevant figure numbers] and [relevant figure numbers], the cleaning device 3 includes a first motor 31, which is fixedly installed on the outer side wall of the water collection tank 1. The output shaft of the first motor 31 passes through the side wall of the water collection tank 1 and is fixedly connected to a first rotating rod 321. The first rotating rod 321 is rotatably installed on the side wall of the water collection tank 1. A second rotating rod 322 is rotatably installed on the side wall of the water collection tank 1. The second rotating rod 322 is arranged parallel to the first rotating rod 321. Runner wheels 323 are fixedly installed on the first rotating rod 321 and the second rotating rod 322. In this embodiment, there are four runner wheels 323, and two runner wheels 323 are in a group and are respectively installed on the first rotating rod 321 and the second rotating rod 322. A conveyor belt 324 is rotatably installed on each group of runner wheels 323.

[0042] A first fixing plate 33 is fixedly installed on the conveyor belt 324. A fixing rod 34 is fixedly installed on the bottom surface of the first fixing plate 33. The fixing rod 34 is arranged vertically. One end of the fixing rod 34 away from the first fixing plate 33 is fixedly installed with a second fixing plate 35. A push plate 36 is fixedly installed on the second fixing plate 35. In this embodiment, the push plate 36 is arranged with holes and docks on the side of the water collection tank 1 away from the water inlet when not in use.

[0043] When it is necessary to clean solid dirt such as fallen leaves and gravel on the filter net 12, the first motor 31 controls the rotation of the first rotating rod 321. The runner 323 on the first rotating rod 321 rotates simultaneously, driving the conveyor belt 324 to rotate. The second rotating rod 322 rotates synchronously with the first rotating rod 321 driven by the conveyor belt 324. While the conveyor belt 324 rotates, the first fixing plate 33 drives the push plate 36 to move towards the solid dirt collection device 2, and pushes the solid dirt on the filter net 12 towards the solid dirt collection device 2, which is collected by the solid dirt collection device 2.

[0044] Refer to Figure 4 , the solid dirt collection device 2 includes a storage box 211. The storage box 211 is fixedly installed on the vertical side wall of the water collection tank 1. A box cover 212 is arranged on the top of the storage box 211, and a handle 213 is fixedly installed on the box cover 212. A through hole is opened on the side wall of the water collection tank 1 connected to the storage box 211. The storage box 211 communicates with the internal cleaning layer 14 of the water collection tank 1 through the through hole. A hanging rod 22 is arranged in the storage box 211. The hanging rod 22 is fixedly installed on the side wall of the storage box 211. A filter frame 231 is arranged in the storage box 211, and a hanging ear 232 is fixedly installed on the filter frame 231. In this embodiment, the filter frame 231 is suspended on the hanging rod 22 through the hanging ear 232.

[0045] Refer to Figure 3 and Figure 5 , a third rotating rod 242 is arranged at the communicating position of the water collection tank 1 and the storage box 211. The third rotating rod 242 is rotatably installed on the side wall of the water collection tank 1. A second motor 241 is fixedly installed on the side wall of the water collection tank 1. The output shaft of the second motor 241 is fixedly connected to the third rotating rod 242. A fourth rotating rod 243 is arranged close to the filter rack 11. The fourth rotating rod 243 is rotatably installed on the side wall of the water collection tank 1. The fourth rotating rod 243 and the third rotating rod 242 are arranged in parallel. The distance between the third rotating rod 242 and the filter rack 11 is greater than the distance between the fourth rotating rod 243 and the filter rack 11. A crawler 244 is rotatably installed on the fourth rotating rod 243 and the third rotating rod 242. A water filtering hole 25 is opened on the side wall of the water collection tank 1 close to the bottom of the storage box 211. The water filtering hole 25 communicates with the inside of the storage box 211.

[0046] When it is necessary to collect solid dirt, the second motor 241 operates to control the rotation of the third rotating rod 242, driving the crawler 244 to rotate to move the solid dirt upward from the filter net 12, and dropping it into the filter frame 231 at the through hole position. The filter frame 231 collects the solid dirt and leaks out the remaining rainwater. The remaining rainwater returns to the water collection tank 1 through the water filtering hole 25, preventing water accumulation inside the storage box 211 and facilitating the collection of solid dirt.

[0047] Refer to Figure 5, the sealing mechanism 7 includes a first limiting block 71 which is fixedly installed on the filter rack 11. A sliding rod 72 is fixedly installed on the side wall of the first limiting block 71 away from the crawler 244. The sliding rod 72 is horizontally arranged. A second limiting block 73 is fixedly installed at one end of the sliding rod 72 away from the first limiting block 71. A first slider 741 is slidably installed on the sliding rod 72. A spring 75 is sleeved on the sliding rod 72. One end of the spring 75 is fixedly connected to the first limiting block 71, and the other end of the spring 75 is fixedly connected to the first slider 741. A pushing block 742 is fixedly installed on the first slider 741. A slide rail 76 is fixedly installed on the side wall of the water collecting tank 1. The slide rail 76 is vertically arranged. A second slider 771 is slidably installed on the slide rail 76. The lower end of the second slider 771 abuts against the pushing block 742. In this embodiment, one end of the pushing block 742 close to the second slider 771 is set as an inclined surface, and the lower end of the second slider 771 is set as an inclined surface. The second slider 771 and the pushing block 742 are in wedge-shaped abutment. A connecting block 772 is fixedly installed on the second slider 771 close to the storage box 211. A baffle 78 is fixedly installed on the connecting block 772. The baffle 78 abuts against the side wall of the water collecting tank 1. In this embodiment, holes are arranged on the baffle 78. When the solid dirt is not collected, the baffle 78 stops and closely adheres to the communication position between the storage box 211 and the water collecting tank 1.

[0048] When the cleaning device 3 pushes the solid dirt on the filter net 12, the push plate 36 pushes the first slider 741 to move close to the storage box 211 along the direction of the sliding rod 72. The pushing block 742 pushes the second slider 771 to move upward along the direction of the slide rail 76. The second slider 771 drives the baffle 78 to move upward to open the through hole, so that the solid dirt on the crawler 244 can smoothly fall into the storage box 211. After the cleaning action is completed, the push plate 36 moves away from the storage box 211. The spring 75 rebounds and pushes the first slider 741 to move away from the storage box 211. The second slider 771 moves downward, driving the baffle 78 to move downward to block the through hole.

[0049] The implementation principle of the embodiment of the present application is as follows: Rainwater is collected by the rainwater collection device 4 and is collected into the water collecting tank 1 by the main water collecting pipe 41. Through the filtration treatment of the water collecting tank 1, the rainwater discharge device 5 is connected to the rainwater well for storing rainwater. At the same time, the rainwater discharge device 5 is communicated with the water collecting tank 1, and the filtered and purified rainwater is discharged to the rainwater well for storage. When cleaning the solid dirt in the water collecting tank 1, the cleaning device 3 pushes the solid dirt to the position of the solid dirt collection device 2. During the movement of the cleaning device 3, it pushes the sealing mechanism 7 to open the entrance of the storage box 211, ensuring that the solid dirt can smoothly fall into the storage box 211. After the collection action is completed, the sealing mechanism 7 re-stops at the communication through hole position between the storage box 211 and the water collecting tank 1, blocking the return of the solid dirt in the storage box 211 to the water collecting tank 1.

[0050] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any 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. A sponge city rainwater purification system, characterized by: The invention comprises a water collecting box (1), wherein a filter frame (11) is arranged in the water collecting box (1), a rainwater collecting device (4), a rainwater discharging device (5) and a solid waste collecting device (2) are arranged on the water collecting box (1), a sealing mechanism (7) is arranged in the water collecting box (1), and a cleaning device (3) is installed inside the water collecting box (1), and the cleaning device (3) controls the opening and closing of the waste inlet of the solid waste collecting device (2) through the sealing mechanism (7).

2. A sponge city rainwater purification system according to claim 1, characterized in that: The sealing mechanism (7) comprises a first limit block (71), the first limit block (71) being mounted on the filter frame (11), a slide bar (72) being mounted on the first limit block (71), a second limit block (73) being mounted on one end of the slide bar (72) away from the first limit block (71), a first sliding block (741) being mounted on the slide bar (72), a spring (75) being sleeved on the slide bar (72), one end of the spring (75) being connected to the first limit block (71), and the other end of the spring (75) being connected to the first limit block (71). The water collecting tank (1) is connected to a sliding block (741), and a pushing block (742) is installed on the first sliding block (741); a sliding rail (76) is provided on the water collecting tank (1), and a second sliding block (771) is slidably installed on the sliding rail (76), and the second sliding block (771) is connected to the pushing block (742); a connecting block (772) is provided on the second sliding block (771) at one end close to the solid waste collecting device (2), and a baffle (78) is installed on the connecting block (772), and the baffle (78) is connected to the solid waste collecting device (2).

3. A sponge city rainwater purification system according to claim 2, characterized in that: The push block (742) and the second sliding block (771) are connected in an oblique wedge-type abutment manner.

4. A sponge city rainwater purification system according to claim 1, characterized in that: The cleaning device (3) comprises a first motor (31), the first motor (31) being mounted on the water collecting tank (1), a first rotating rod (321) being mounted on the water collecting tank (1), an output shaft of the first motor (31) being fixedly connected to the first rotating rod (321), a second rotating rod (322) being mounted on the water collecting tank (1), a rotating wheel (323) being mounted on both the first rotating rod (321) and the second rotating rod (322), a conveyor belt (324) being arranged between the first rotating rod (321) and the second rotating rod (322), the conveyor belt (324) being mounted on the rotating wheel (323); a first fixing plate (33) being mounted on the conveyor belt (324), a fixing rod (34) being mounted on the bottom surface of the first fixing plate (33), a second fixing plate (35) being mounted on one end of the fixing rod (34) away from the first fixing plate (33), and a push plate (36) being mounted on the second fixing plate (35).

5. The sponge city rainwater purification system according to claim 1 is characterized in that: The solid waste collection device (2) comprises a storage box (211), the storage box (211) being mounted on a side wall of the water collecting box (1), the interior of the storage box (211) being in communication with the water collecting box (1), a box cover (212) being provided at the top of the storage box (211), a handle (213) being installed on the box cover (212), and a filter frame (231) being provided inside the storage box (211); a second motor (231) being installed on the side wall of the water collecting box (1) (241), a third rotating rod (242) is installed on the water collecting box (1) near the storage box (211), the output shaft of the second motor (241) is fixedly connected to the third rotating rod (242), a fourth rotating rod (243) is arranged near the filter frame (11), the fourth rotating rod (243) is installed on the water collecting box (1), and tracks (244) are arranged on the fourth rotating rod (243) and the third rotating rod (242).

6. A sponge city rainwater purification system according to claim 5, characterized in that: The rainwater collection device (4) comprises a first diffuser cover (42), the first diffuser cover (42) being in communication with the water collection tank (1), and one end of the first diffuser cover (42) away from the water collection tank (1) being connected to a water collection main pipe (41).

7. The sponge city rainwater purification system according to claim 5 is characterized by: A water filter hole (25) is provided on the side wall of the water collecting box (1) near the bottom of the storage box (211), and the water filter hole (25) is connected to the interior of the storage box (211).

8. The sponge city rainwater purification system according to claim 1 is characterized by: The rainwater drainage device (5) comprises a second connecting pipe (53), the second connecting pipe (53) being in communication with the interior of the water collecting tank (1), and the second connecting pipe (53) being connected to a main drainage pipe (51).

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