A rainwater storage system for sponge cities

Abstract

This application relates to a rainwater drainage and storage system for sponge cities, applied in the field of rainwater treatment technology. It includes a rainwater pipe, a diversion tank, a sedimentation tank, a storage tank, and an inlet pipe. One end of the rainwater pipe is connected to a rainwater pipe network, and the other end passes through the diversion tank and extends into the sedimentation tank. A diversion pipe is connected to the rainwater pipe, and an overflow pipe is connected to the diversion tank. A guide frame is provided in the sedimentation tank, and a sealing plate is slidably mounted on the guide frame. A sealing plate driving mechanism is provided in the diversion tank. The rainwater drainage and storage system also includes a sludge removal mechanism, a sludge pushing driving mechanism, and a pair of sludge pushing mechanisms. One end of the sludge removal mechanism is located at the bottom of the storage tank, and the other end is connected to an external sludge tank. A frame is provided on the top wall of the storage tank, and the sludge pushing driving mechanism is mounted on the frame. The sludge removal mechanism is located between the pair of sludge pushing mechanisms, and the sludge pushing mechanism is in contact with the bottom of the storage tank. This application has the effect of reducing the possibility of secondary pollution of rainwater in the storage tank.

Description

Technical Field

[0001] This application relates to the field of rainwater treatment technology, and in particular to a rainwater storage and drainage system for sponge cities. Background Technology

[0002] A sponge city refers to a city that, like a sponge, possesses excellent resilience in adapting to environmental changes and responding to natural disasters caused by rainwater. Rainwater drainage and storage systems are a crucial component of sponge city construction. They drain, store, and purify rainwater during rainfall, and release and utilize the stored water when needed, enabling rainwater to migrate freely within the city.

[0003] The rainwater storage system in the relevant technology includes a diversion tank, a sedimentation tank, and a storage tank. Rainwater is collected through an underground pipe network and flows into the diversion tank through rainwater pipes. After the diversion tank is full, the water flows into the sedimentation tank through pipes to perform preliminary sedimentation of the silt in the water. Then, the water in the sedimentation tank is introduced into the storage tank through pipes for storage. The storage tank is equipped with a water pump, which can supply water from the storage tank when water is needed.

[0004] Regarding the aforementioned technologies, the inventors believe that even after rainwater passes through a sedimentation tank, silt and pollutants from runoff will still remain in the water. These silt and pollutants will enter the reservoir with the rainwater and settle at the bottom of the reservoir for a long time, easily causing foul odors and leading to re-polluting of the water. Summary of the Invention

[0005] To address the problem of long-term sedimentation of silt and pollutants in water storage tanks, which easily leads to foul odors and subsequent water pollution, this application provides a rainwater drainage and storage system for sponge cities.

[0006] This application provides a rainwater drainage and storage system for sponge cities, which adopts the following technical solution:

[0007] A rainwater drainage and storage system for sponge cities includes a rainwater pipe, a diversion tank, a sedimentation tank, a storage tank, and an inlet pipe connecting the sedimentation tank and the storage tank. One end of the rainwater pipe is connected to a rainwater pipe network, and the other end of the rainwater pipe passes through the diversion tank and extends into the sedimentation tank. The portion of the rainwater pipe located in the diversion tank is connected to a diversion pipe. An overflow pipe is connected to the diversion tank and is connected to the municipal sewage system. A guide frame is provided in the sedimentation tank, and a sealing plate is slidably mounted on the guide frame. The outlet end of the rainwater pipe abuts against the sealing plate. A sealing plate driving mechanism is provided in the diversion tank for driving the sealing plate to slide.

[0008] The rainwater drainage and storage system also includes a sludge discharge mechanism, a sludge pushing drive mechanism, and a pair of sludge pushing mechanisms for moving sludge to the sludge discharge mechanism. The sludge discharge mechanism is used to discharge sludge from the water storage tank. One end of the sludge discharge mechanism is located at the bottom of the water storage tank, and the other end of the sludge discharge mechanism is connected to an external sludge tank.

[0009] A frame is provided on the top wall of the water storage tank, and the sludge pushing drive mechanism is located on the frame. The sludge pushing drive mechanism is used to drive a pair of sludge pushing mechanisms to move towards each other or away from each other. The sludge discharge mechanism is located between the pair of sludge pushing mechanisms, and the sludge pushing mechanism is in contact with the bottom of the water storage tank.

[0010] By adopting the above technical solution, initially, the sealing plate closes the outlet end of the rainwater pipe. During rainfall, rainwater collected by the rainwater pipe network flows into the diversion tank through the rainwater pipe and the diversion pipe. When the water in the diversion tank reaches the design weight, the sealing plate drive mechanism is activated, causing the sealing plate to open the outlet end of the rainwater pipe. Part of the water in the rainwater pipe flows into the diversion tank, and from there it flows into the municipal sewage system through the overflow pipe. The other part flows into the sedimentation tank, and then into the storage tank through the inlet pipe. This process does not require manual intervention. After the rain stops, the rainwater in the diversion tank and sedimentation tank is manually cleaned using equipment for subsequent use.

[0011] After a period of settling, sludge and pollutants settle at the bottom of the water storage tank. The sludge and pollutants at the bottom of the water storage tank are periodically discharged to an external sludge tank through a sludge discharge mechanism, which can reduce the possibility of sludge and pollutants re-polluting the water body.

[0012] Before activating the sludge discharge mechanism, a pair of sludge-pushing mechanisms are driven by a sludge-pushing drive mechanism to move closer to each other until they are on one side of the sludge discharge mechanism. This allows the sludge-pushing mechanisms to move the settled sludge and pollutants to the vicinity of the sludge discharge mechanism for easy discharge. This enables the sludge discharge mechanism to discharge more sludge and pollutants from the reservoir, thereby reducing the possibility of sludge and pollutants re-polluting the water body.

[0013] Optionally, the sludge discharge mechanism includes a sludge discharge pipe and a sludge discharge pump mounted on the sludge discharge pipe. One end of the sludge discharge pipe is connected to the bottom of the water storage tank, and the other end of the sludge discharge pipe is connected to an external sludge tank.

[0014] By adopting the above technical solution, sludge and pollutants at the bottom of the water storage tank can be discharged from the water storage tank using a sludge pump.

[0015] Optionally, the sludge pushing mechanism includes an installation frame, a sludge pushing filter screen disposed on the installation frame, and a sludge pushing filter cloth disposed on the sludge pushing filter screen. The sludge inlet of the sludge discharge pipe is located between a pair of the sludge pushing filter cloths. The sludge pushing drive mechanism is connected to the installation frame, and the installation frame is in contact with the bottom of the water storage tank.

[0016] By adopting the above technical solution, as the sludge-pushing drive mechanism moves a pair of mounting frames towards the inlet of the sludge discharge pipe, water passes through the sludge-pushing filter screen and filter cloth, while the sludge in the water is trapped between the filter cloth and the inlet of the sludge discharge pipe. Then, under the suction of the sludge discharge pump, the sludge and pollutants are discharged from the water storage tank. The sludge-pushing filter screen moves the sludge that is far from the inlet of the sludge discharge pipe to near the inlet, thus facilitating the suction of the sludge discharge pump. This allows more sludge and pollutants to be discharged from the water storage tank, reducing the possibility of secondary pollution of the water body.

[0017] Optionally, the mud-pushing drive mechanism includes a drive motor and a bidirectional lead screw. The left-hand threaded section and the right-hand threaded section of the bidirectional lead screw are both threadedly connected to a moving block. The moving block is provided with a pair of connecting rods, and the end of the connecting rod away from the moving block is connected to the mounting frame.

[0018] By adopting the above technical solution, the bidirectional lead screw can be driven by the drive motor to rotate, which can drive the moving blocks to move towards or away from each other, thereby driving a pair of mounting frames to move towards or away from the sludge discharge pipe at the same time, moving the sludge to the vicinity of the sludge discharge pipe inlet.

[0019] Optionally, the sealing plate driving mechanism includes a driving assembly and a pair of traction assemblies. The traction assembly includes a pull rope, a fixed pulley group, and a bracket. The fixed pulley group is mounted on the bracket, and the bracket is mounted on the side wall of the wastewater. One end of the pull rope is mounted on the driving assembly, and the other end of the pull rope is mounted on the sealing plate. The pull rope is also attached to the fixed pulley group. The driving assembly is used to pull the pull rope.

[0020] By adopting the above technical solution, when the water in the diversion tank reaches the design weight, the drive component is activated. The drive component pulls the pull rope, and under the guidance of the fixed pulley group, the pull rope pulls the sealing plate up to open the outlet end of the rainwater pipe, allowing rainwater to flow into the sedimentation tank.

[0021] Optionally, the drive assembly includes a tray, a sealing layer on the outer periphery of the tray, and a plurality of springs on the bottom surface of the tray. The ends of the springs away from the tray are located on the bottom of the wastewater pool. The sealing layer is in contact with the inner wall of the wastewater pool, and the pull rope is located on the tray.

[0022] By adopting the above technical solution, rainwater flows into the diversion pool and falls onto the support plate. As the weight of the rainwater increases, the spring is gradually compressed, and the support plate moves down, which can pull the pull rope, causing the pull rope to pull the sealing plate up and open the outlet of the rainwater pipe without manual intervention.

[0023] Optionally, the rainwater storage system further includes a pair of mud-blocking drive mechanisms, a reset mechanism, and a mud-blocking mechanism for intercepting sludge. The mud-blocking mechanism is located on the side wall of the water storage tank and above the mounting frame, and both mud-blocking mechanisms are located between a pair of connecting rods.

[0024] The mud-blocking drive mechanism is mounted on the frame and is used to drive a pair of mud-blocking mechanisms to move toward each other. One end of the reset mechanism is mounted on the mud-blocking mechanism and is used to drive the mud-blocking mechanism to reset.

[0025] By adopting the above technical solution, when it is necessary to clean the sludge at the bottom of the water storage tank, the sludge-blocking drive mechanism is activated to move a pair of sludge-blocking mechanisms closer to each other until they are in contact. The sludge-blocking mechanisms separate the sludge at the bottom of the tank from the water at the top. When a pair of sludge-pushing mechanisms move towards the inlet of the sludge discharge pipe, the sludge-blocking mechanisms can intercept the sludge, thereby reducing the possibility of the sludge flowing out between the pair of sludge-pushing mechanisms with the water flow.

[0026] Once the sludge at the bottom of the reservoir has been cleaned, the sludge-blocking drive mechanism is activated to reset. Under the action of the reset mechanism, the sludge-blocking mechanism can be reset so that it can intercept sludge next time.

[0027] Optionally, the side wall of the wastewater is provided with an installation groove, the mud-blocking mechanism includes a rotating shaft and a mud-blocking layer wrapped around the rotating shaft, the rotating shaft is rotatably connected in the installation groove, one end of the mud-blocking layer is provided on the rotating shaft, the other end of the mud-blocking layer is provided with a connecting rod, and the mud-blocking drive mechanism is connected to the connecting rod.

[0028] One end of the reset mechanism is located on the rotating shaft, and the other end of the reset mechanism is located in the mounting groove.

[0029] By adopting the above technical solution, when it is necessary to clean the sludge at the bottom of the water storage tank, the mud-blocking drive mechanism is activated to move a pair of rods closer together, thereby driving the mud-blocking layer to separate the sludge at the bottom of the tank from the water at the top. After cleaning is completed, the reset mechanism drives the rotating shaft to reverse, and at the same time, the mud-blocking drive mechanism resets, so that the mud-blocking layer can be rolled back onto the rotating shaft, thereby reducing the possibility that the mud-blocking layer will affect rainwater sedimentation.

[0030] Optionally, the mud-blocking layer includes a mud-blocking filter screen, a protective cloth filter screen, and a mud-blocking filter cloth, wherein the mud-blocking filter cloth is disposed between the mud-blocking filter screen and the protective cloth filter screen.

[0031] By adopting the above technical solution, when the sludge-pushing mechanism moves the sludge, the sludge in the water is intercepted by the sludge-blocking filter cloth, thereby reducing the possibility of the sludge flowing out between the sludge-pushing mechanisms. The protective filter cloth and the sludge-blocking filter cloth can reduce the possibility of deformation of the sludge-blocking filter cloth under the impact of water flow, thus improving the service life of the sludge-blocking filter cloth.

[0032] Optionally, the reset mechanism includes a spring box and a spring disposed within the spring box. One end of the spring away from the spring box is disposed on the rotating shaft. The spring box is disposed within the mounting groove, and the rotating shaft passes through the spring box.

[0033] By adopting the above technical solution, when the mud-blocking drive mechanism drives a pair of connecting rods to move closer to each other, the rotating shaft rotates to store energy in the coil spring. When the mud-blocking drive mechanism drives the connecting rods to reset, the rotating shaft is reset under the drive of the coil spring, thereby rewinding the mud-blocking layer.

[0034] In summary, this application includes at least one of the following beneficial effects:

[0035] 1. The sludge pushing mechanism drives a pair of sludge pushing mechanisms to move the settled sludge and pollutants to the vicinity of the sludge discharge mechanism, so that the sludge discharge mechanism can discharge more sludge and pollutants from the water storage tank, thereby reducing the possibility of sludge and pollutants accumulating for a long time and polluting the water body again.

[0036] 2. When a pair of sludge pushing mechanisms move toward the inlet of the sludge discharge pipe, the sludge blocking mechanism can intercept the sludge, thereby reducing the possibility of the sludge flowing out between the pair of sludge pushing mechanisms with the water flow, and thus enabling the sludge discharge mechanism to discharge more sludge and pollutants from the water storage tank.

[0037] 3. Rainwater flows into the diversion pool and falls onto the support plate. As the weight of the rainwater increases, the spring is gradually compressed, and the support plate moves down. This allows the pull rope to be pulled up, which in turn pulls the sealing plate to open the outlet of the rainwater pipe without manual intervention. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the rainwater drainage and storage system of the sponge city in this application embodiment when it is located underground.

[0039] Figure 2 This is a cross-sectional view of the wastewater and sedimentation tank in the embodiments of this application.

[0040] Figure 3 yes Figure 2 Enlarged view of section A.

[0041] Figure 4 This is a cross-sectional view of the water storage tank in an embodiment of this application.

[0042] Figure 5 yes Figure 4 Enlarged view of section B.

[0043] Figure 6 yes Figure 4 Enlarged view of section C.

[0044] Reference numerals: 1. Diversion tank; 2. Sedimentation tank; 3. Storage tank; 31. Mounting groove; 4. Sealing plate drive mechanism; 41. Drive assembly; 411. Support plate; 412. Sealing layer; 413. Spring; 42. Traction assembly; 421. Pull rope; 422. Fixed pulley; 423. Bracket; 5. Sludge discharge mechanism; 51. Sludge discharge pipe; 52. Sludge discharge pump; 53. Sludge discharge branch pipe; 6. Sludge pushing drive mechanism; 61. Drive motor; 62. Bidirectional lead screw; 63. Moving block; 64. Connecting rod; 7. Sludge pushing mechanism; 71. Mounting frame; 72. Sludge pushing filter screen; 73. Sludge pushing filter cloth; 8. Mud-blocking mechanism; 81. Rotating shaft; 82. Mud-blocking layer; 821. Mud-blocking filter screen; 822. Protective cloth filter screen; 823. Mud-blocking filter cloth; 83. Connecting rod; 9. Mud-blocking drive mechanism; 91. Multi-stage multi-section cylinder; 92. Drive rod; 10. Reset mechanism; 101. Spring box; 102. Spring; 11. Frame; 12. Rainwater pipe; 13. Inlet pipe; 14. Diversion pipe; 15. Overflow pipe; 16. Guide frame; 17. Sealing plate; 18. Tension spring; 19. Cover plate; 20. Water intake pipe; 21. Diversion pump; 22. Pumping hose; 23. Drain pipe; 24. Overflow valve. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0046] This application discloses a rainwater drainage and storage system for sponge cities. (Refer to...) Figure 1 and Figure 2 The rainwater drainage and storage system of a sponge city is located underground and includes a diversion tank 1, a sedimentation tank 2, a storage tank 3, a sludge removal mechanism 5, a rainwater pipe 12, a diversion pipe 14, an inlet pipe 13, a guide frame 16, a sealing plate 17 slidably mounted on the guide frame 16, and a driving mechanism 4 for the sealing plate 17 installed in the diversion tank 1. A cover plate 19 is placed on the ground to cover the diversion tank 1 and the sedimentation tank 2. A water intake pipe 20 is fixed in the soil, with one end above ground and the other end extending into the storage tank 3. The portion of the water intake pipe 20 inside the storage tank 3 has several through holes. A water pump and the water intake pipe 20 are installed inside the water intake pipe 20. When water is needed, the water pump is activated to supply water from the storage tank 3.

[0047] Reference Figure 2 and Figure 3One end of the rainwater pipe 12 is connected to an external rainwater pipe network, and the other end of the rainwater pipe 12 extends through the diversion tank 1 into the sedimentation tank 2. The diversion pipe 14 is connected to the part of the rainwater pipe 12 located in the diversion tank 1. The guide frame 16 is fixed inside the sedimentation tank 2. Several tension springs 18 are fixed to the bottom end of the sealing plate 17. The ends of the tension springs 18 away from the sealing plate 17 are fixed to the guide frame 16. The tension springs 18 support the sealing plate 17, causing the sealing plate 17 to abut against the outlet end of the rainwater pipe 12. In the initial state, the sealing plate 17 closes the outlet end of the rainwater pipe 12. The top end of the sealing plate 17 is connected to the sealing plate 17 drive mechanism 4. The sealing plate 17 can be driven to rise through the sealing plate 17 drive mechanism 4, opening the outlet end of the rainwater pipe 12 and allowing rainwater to flow into the sedimentation tank 2. The inlet pipe 13 connects the sedimentation tank 2 and the storage tank 3. The overflow of the sedimentation tank 2 flows into the storage tank 3 through the inlet pipe 13 for storage, and the sludge and pollutants in the storage tank 3 and the sedimentation tank 2 are discharged periodically by the sludge discharge mechanism 5.

[0048] Reference Figure 1 and Figure 2 An overflow pipe 15 is connected to the diversion tank 1, which is connected to the municipal sewage system. An overflow valve 24 is installed on the overflow pipe 15 and is normally open. A diversion pump 21 is installed on the side wall of the diversion tank 1. The inlet end of the diversion pump 21 is connected to a pumping hose 22, which is located inside the diversion tank 1. The outlet end of the diversion pump 21 is connected to a drain pipe 23, and the outlet end of the drain pipe 23 is connected to the part of the overflow pipe 15 between the overflow valve 24 and the municipal sewage system. When the rainfall is small, the rainwater collected by the rainwater pipe network 12 enters the diversion tank 1 through the rainwater pipe 12 and the diversion pipe 14. After the rain stops, the overflow valve 24 is closed, the diversion pump 21 is turned on to discharge the rainwater in the diversion tank 1 in a timely manner, and then the overflow valve 24 is opened again.

[0049] When the rainfall is heavy, the rainwater first flows into the diversion pool 1. When the water in the diversion pool 1 reaches the design weight, the sealing plate 17 drive mechanism 4 is activated, which opens the outlet end of the rainwater pipe 12. Part of the water in the rainwater pipe 12 flows into the diversion pool 1 and from the diversion pool 1 through the overflow pipe 15 into the municipal sewage system. The other part flows into the sedimentation tank 2. The overflow of the sedimentation tank 2 flows into the water storage tank 3 through the inlet pipe 13 for storage.

[0050] Reference Figure 2 and Figure 3The sealing plate 17 drive mechanism 4 includes a drive assembly 41 and a pair of traction assemblies 42. The water inlet pipe 13 is located between the pair of traction assemblies 42, and the drive assembly 41 is located below the water inlet pipe 13. The drive assembly 41 includes a support plate 411, a sealing layer 412 bonded to the outer periphery of the support plate 411, and several springs 413 fixed to the bottom surface of the support plate 411. The end of the spring 413 away from the support plate 411 is fixed to the bottom of the diversion tank 1. The rubber sealing layer 412 is in contact with the inner wall of the diversion tank 1 to reduce the possibility of rainwater flowing into the bottom of the diversion tank 1 from between the support plate 411 and the tank wall.

[0051] The traction assembly 42 includes a pull rope 421, a set of fixed pulleys 422, and a bracket 423. The set of fixed pulleys 422 consists of a pair of fixed pulleys 422, which are rotatably connected to the bracket 423. The bracket 423 is fixed to the side wall of the wastewater 1. One end of the pull rope 421 is fixed to the support plate 411, and the other end is fixed to the sealing plate 17. The pull rope 421 overlaps the pair of fixed pulleys 422, and under the guidance of the fixed pulleys 422, the pull rope 421 can pull the sealing plate 17 upward.

[0052] In the initial stage of rainfall, the rainwater contains a large amount of pollutants and silt. This portion of the rainwater first enters the diversion tank 1 and falls onto the support plate 411. As the rainfall in the diversion tank 1 increases, it is eventually discharged into the municipal sewage system. At the same time, as the weight of the rainwater in the diversion tank 1 increases, the spring 413 is gradually compressed, causing the support plate 411 to move downward. This pulls the pull rope 421, causing the sealing plate 17 to rise and open the outlet end of the rainwater pipe 12. This allows rainwater with less silt and pollutants to flow into the sedimentation tank 2. Furthermore, the separation of the initial rainwater and the later rainwater does not require manual intervention, which is very convenient.

[0053] After the rain stops, the rainwater in the diversion pool 1 is discharged by the diversion pump 21, the support plate 411 is reset under the elastic force of the spring 413, the sealing plate 17 is reset under the tension of the tension spring 18, and the outlet end of the rainwater pipe 12 is sealed. The sludge in the sedimentation tank 2 is discharged by the sludge discharge mechanism 5 for subsequent use.

[0054] Reference Figure 1 The sludge discharge mechanism 5 includes a sludge discharge pump 52, a sludge discharge pipe 51, and a sludge discharge branch pipe 53 connected to the sludge discharge pipe 51. One end of the sludge discharge pipe 51 is connected to the bottom of the water storage tank 3, and the other end is connected to an external sludge tank. A first sludge discharge valve is installed on the sludge discharge pipe 51 at the location between the water storage tank 3 and the sludge discharge branch pipe 53. The sludge discharge branch pipe 53 is connected to the bottom of the sedimentation tank 2, and a second sludge discharge valve is installed on the sludge discharge branch pipe 53. The sludge discharge pump 52 is installed on the sludge discharge pipe 51 at the location between the external sludge tank and the sludge discharge branch pipe 53. Closing the first sludge discharge valve, opening the second sludge discharge valve, and starting the sludge discharge pump 52 can discharge the sludge and pollutants in the sedimentation tank 2.

[0055] After a period of settling, the sludge and pollutants in the water storage tank 3 settle at the bottom of the water storage tank 3. The second sludge discharge valve is closed, the first sludge discharge valve is opened, and the sludge discharge pump 52 is started periodically to discharge the sludge and pollutants at the bottom of the water storage tank 3 to an external sludge tank, so as to reduce the possibility of sludge and pollutants polluting the water body again.

[0056] Reference Figure 1 and Figure 4 A frame 11 is fixed to the top of the water storage tank 3. A sludge-pushing drive mechanism 6 and a pair of sludge-blocking drive mechanisms 9 are installed on the frame 11. A pair of sludge-pushing mechanisms 7 are placed on both sides of the inlet of the sewage pipe on the bottom of the water storage tank 3. The sludge-pushing drive mechanism 6 drives the pair of sludge-pushing mechanisms 7 to move closer to each other until they move to the side of the sludge discharge mechanism 5, allowing the sludge-pushing mechanisms 7 to move the settled sludge and pollutants to the vicinity of the sludge discharge mechanism 5 for easy discharge. A pair of mounting grooves 31 are provided on the side wall of the water storage tank 3 above the sludge-pushing mechanisms 7. A sludge-blocking mechanism 8 and a reset mechanism 10 for driving the sludge-blocking mechanism 8 to reset are installed in each mounting groove 31. The sludge-blocking drive mechanism 9 drives the pair of sludge-blocking mechanisms 8 to move closer to each other until they are in contact. The sludge-blocking mechanism 8 reduces the possibility of sludge flowing out between the sludge-pushing mechanisms 7 with the water flow.

[0057] Reference Figure 4 The mud-pushing drive mechanism 6 includes a drive motor 61, a double-acting lead screw 62, and a pair of moving blocks 63. The drive motor 61 is mounted on the frame 11, and the double-acting lead screw 62 is rotatably connected to the frame 11. One moving block 63 is threadedly connected to the left-hand threaded section of the double-acting lead screw 62, and the other moving block 63 is threadedly connected to the right-hand threaded section of the double-acting lead screw 62. A pair of connecting rods 64 are fixed on the moving block 63, and the pair of connecting rods 64 fixed on the same moving block 63 are simultaneously fixed to one of the mud-pushing mechanisms 7.

[0058] Reference Figure 4 and Figure 5The sludge pushing mechanism 7 includes a mounting frame 71, a sludge pushing filter cloth 73, and a sludge pushing screen 72 fixed on the mounting frame 71. A connecting rod 64 is fixed on the mounting frame 71. The mounting frame 71 is attached to the side wall and bottom wall of the water storage tank 3. In this embodiment, the sludge pushing filter cloth 73 is made of geotextile, which is sewn onto the sludge pushing screen with resin material. The drive motor 61 is started to rotate the bidirectional lead screw 62, driving a pair of moving blocks 63 to move closer to each other. During the movement of the mounting frame 71, water passes through the sludge pushing screen 72 and the sludge pushing filter cloth 73, while the sludge in the water is trapped between the sludge pushing filter cloth 73 and the inlet of the sludge discharge pipe 51. This allows sludge that is far from the inlet of the sludge discharge pipe 51 to be moved to the vicinity of the inlet of the sludge discharge pipe 51, so that the sludge discharge pump 52 can suck it up. In this way, more sludge and pollutants can be discharged from the water storage tank 3, reducing the possibility of secondary pollution of the water body.

[0059] When the drive motor 61 is started and reversed, a pair of moving blocks 63 drive a pair of mounting frames 71 to move away from each other. During the movement, water flows through the pusher filter cloth 73 to backwash the pusher filter cloth 73, thereby reducing the possibility of the pusher filter cloth 73 becoming clogged.

[0060] Reference Figure 4 and Figure 5 The mud-blocking drive mechanism 9 includes a multi-stage multi-section cylinder 91 and a drive rod 92 fixed on the drive end of the multi-stage multi-section cylinder 91. The multi-stage multi-section cylinder 91 is fixed on the frame 11 and located below the drive motor 61. The drive rod 92 is fixedly connected to the mud-blocking mechanism 8.

[0061] Reference Figure 4 , Figure 5 and Figure 6 The mud-blocking mechanism 8 includes a rotating shaft 81, a connecting rod 83, and a mud-blocking layer 82 wound around the rotating shaft 81. The mud-blocking layer 82 is located between a pair of reset mechanisms 10. The reset mechanism 10 includes a spring box 101 and a spring 102 located inside the spring box 101. The spring box 101 is fixed in the mounting groove 31. The rotating shaft 81 coaxially passes through the spring box 101 and is rotatably connected in the mounting groove 31, and the rotating shaft 81 is set perpendicular to the double-acting screw 62. One end of the mud-blocking layer 82 is fixed to the rotating shaft 81, and the other end of the mud-blocking layer 82 is fixedly connected to the connecting rod 83. The end of the drive rod 92 away from the multi-stage multi-section cylinder 91 is fixed to the connecting rod 83. Starting the multi-stage multi-section cylinder 91 can drive the connecting rod 83 to move towards the inlet of the mud discharge pump 52 until a pair of connecting rods 83 come into contact, so that the mud-blocking layer 82 separates the sludge at the bottom of the pool from the water at the top, while the spring 102 stores energy.

[0062] Reference Figure 4 , Figure 5 and Figure 6The mud-blocking layer 82 includes a mud-blocking filter screen 821, a protective cloth filter screen 822, and a mud-blocking filter cloth 823. The mud-blocking filter cloth 823 is located between the mud-blocking filter screen 821 and the protective cloth filter screen 822, and is fixed to the protective cloth filter screen 822 and the mud-blocking filter screen 821 by stitching. In this embodiment, the protective cloth filter screen 822 is made of geotextile, while the mud-blocking filter screen 821 and the protective cloth filter screen 822 are made of metal. They can be rolled up on the rotating shaft 81, which can also reduce the possibility of deformation of the mud-blocking filter cloth 823 under the impact of water flow, thereby improving the service life of the mud-blocking filter cloth 823. The mud-blocking filter screen 821 is located below the protective cloth filter screen 822. One end of the mud-blocking filter screen 821 is fixed to the rotating shaft 81, and the other end of the mud-blocking filter screen 821 is fixed to the connecting rod 83. The ends of the protective cloth filter screen 822 and the mud-blocking filter cloth 823 away from the rotating shaft 81 are also fixed to the connecting rod 83. When the sludge-pushing filter cloth 73 moves the sludge, the water between the pair of sludge-pushing filter cloths 73 flows upward. The sludge in the water is intercepted by the sludge-blocking filter cloth 823, which reduces the possibility of the sludge flowing out between the pair of sludge-pushing filter cloths 73 with the water flow. As a result, the sludge pump 52 can pump more sludge and pollutants out of the water storage tank 3.

[0063] In addition, when the sludge pump 52 is pumping sludge, the water above the sludge baffle layer 82 flows to the inlet of the sludge discharge pipe 51. During this process, the clean water in the upper part flows through the sludge baffle filter cloth 823, which can reduce the possibility of the sludge baffle filter cloth 823 becoming blocked.

[0064] After the sludge at the bottom of the water storage tank 3 is cleaned, the multi-stage multi-section cylinder 91 is activated to reset, and at the same time, the coil spring 102 drives the rotating shaft 81 to rotate and rewind the mud-blocking layer 82 onto the rotating shaft 81 to reduce the possibility that the mud-blocking layer 82 will affect rainwater sedimentation.

[0065] When it is necessary to clean the sludge in the reservoir 3, the multi-stage multi-section cylinder 91 is activated to drive a pair of rods 83 to move closer together until they are in contact. At this time, the mud-blocking layer 82 separates the sludge at the bottom of the reservoir from the water at the top, and the coil spring 102 stores energy. Then, the drive motor 61 is activated to rotate the bidirectional lead screw 62, driving a pair of moving blocks 63 to move closer together. During the movement of the mounting frame 71, water passes through the mud-pushing filter screen 72 and the mud-pushing filter cloth 73, while the sludge in the water is trapped between the mud-pushing filter cloth 73 and the inlet of the sludge discharge pipe 51. This allows sludge that is far from the inlet of the sludge discharge pipe 51 to be moved closer to the inlet of the sludge discharge pipe 51, so that the sludge discharge pump 52 can suck it up. The sludge discharge pump 52 is then activated to discharge more sludge and pollutants from the reservoir 3, reducing the possibility of secondary pollution of the water body.

[0066] The implementation principle of a rainwater drainage and storage system for a sponge city according to an embodiment of this application is as follows: When it is necessary to clean the sludge in the storage tank 3, the multi-stage multi-throttle cylinder 91 is activated to drive a pair of rods 83 to move closer to each other until the rods 83 are in contact. At this time, the mud-blocking layer 82 separates the sludge at the bottom of the tank from the water at the top, and the coil spring 102 stores energy. Then, the drive motor 61 is activated to rotate the bidirectional lead screw 62, driving a pair of moving blocks 63 to move closer to each other. During the movement of the mounting frame 71, water passes through the mud-pushing filter screen 72 and the mud-pushing filter cloth 73, while the sludge in the water is trapped between the mud-pushing filter cloth 73 and the inlet of the sludge discharge pipe 51. This allows sludge that is far from the inlet of the sludge discharge pipe 51 to be moved to the vicinity of the inlet of the sludge discharge pipe 51, so that the sludge discharge pump 52 can suck it up. Then, the sludge discharge pump 52 is activated to discharge more sludge and pollutants from the storage tank 3, reducing the possibility of secondary pollution of the water body.

[0067] After the sludge at the bottom of the water storage tank 3 is cleaned, the drive motor 61 is started to reverse, causing the pair of mounting frames 71 to reset. Then, the multi-stage multi-section cylinder 91 is started to reset, and at the same time, the coil spring 102 drives the rotating shaft 81 to rotate and rewind the mud-blocking layer 82 onto the rotating shaft 81, so that the sludge at the bottom of the water storage tank 3 can be cleaned next time.

[0068] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rainwater drainage and storage system for a sponge city, comprising a rainwater pipe (12), a diversion tank (1), a sedimentation tank (2), a storage tank (3), and an inlet pipe (13) connecting the sedimentation tank (2) and the storage tank (3), wherein one end of the rainwater pipe (12) passes through the diversion tank (1) and extends into the sedimentation tank (2), characterized in that: The portion of the rainwater pipe (12) located within the diversion tank (1) is connected to the diversion pipe (14). An overflow pipe (15) is connected to the diversion tank (1). The overflow pipe (15) is connected to the municipal sewage system. A guide frame (16) is provided inside the sedimentation tank (2). A sealing plate (17) is slidably provided on the guide frame (16). The outlet end of the rainwater pipe (12) abuts against the sealing plate (17). A sealing plate (17) driving mechanism (4) for driving the sealing plate (17) to slide is provided inside the diversion tank (1). The rainwater drainage and storage system also includes a sludge discharge mechanism (5), a sludge pushing drive mechanism (6), and a pair of sludge pushing mechanisms (7) for moving sludge to the sludge discharge mechanism (5). The sludge discharge mechanism (5) is used to discharge sludge from the water storage tank (3). One end of the sludge discharge mechanism (5) is located at the bottom of the water storage tank (3), and the other end of the sludge discharge mechanism (5) is connected to an external sludge tank. The top wall of the water storage tank (3) is provided with a frame (11), and the sludge pushing drive mechanism (6) is provided on the frame (11). The sludge pushing drive mechanism (6) is used to drive a pair of sludge pushing mechanisms (7) to move towards each other or away from each other. The sludge discharge mechanism (5) is located between the pair of sludge pushing mechanisms (7), and the sludge pushing mechanism (7) is in contact with the bottom of the water storage tank (3). The sludge discharge mechanism (5) includes a sludge discharge pipe (51) and a sludge discharge pump (52) installed on the sludge discharge pipe (51). One end of the sludge discharge pipe (51) is connected to the bottom of the water storage tank (3), and the other end of the sludge discharge pipe (51) is connected to an external sludge tank. The sludge pushing mechanism (7) includes a mounting frame (71), a sludge pushing filter screen (72) disposed on the mounting frame (71), and a sludge pushing filter cloth (73) disposed on the sludge pushing filter screen (72). The sludge inlet of the sludge discharge pipe (51) is located between a pair of the sludge pushing filter cloths (73). The sludge pushing drive mechanism (6) is connected to the mounting frame (71), and the mounting frame (71) is in contact with the bottom of the water storage tank (3). The rainwater storage system also includes a pair of mud-blocking drive mechanisms (9), a reset mechanism (10), and a mud-blocking mechanism (8) for intercepting sludge. The mud-blocking mechanism (8) is located on the side wall of the water storage tank (3) and above the mounting frame (71), and both mud-blocking mechanisms (8) are located between a pair of connecting rods (64). The mud-blocking drive mechanism (9) is mounted on the frame (11). The mud-blocking drive mechanism (9) is used to drive a pair of mud-blocking mechanisms (8) to move toward each other. One end of the reset mechanism (10) is mounted on the mud-blocking mechanism (8). The reset mechanism (10) is used to drive the mud-blocking mechanism (8) to reset.

2. The rainwater drainage and storage system for a sponge city according to claim 1, characterized in that: The mud-pushing drive mechanism (6) includes a drive motor (61) and a two-way lead screw (62). The left-hand threaded section and the right-hand threaded section of the two-way lead screw (62) are both threadedly connected to a moving block (63). A pair of connecting rods (64) are provided on the moving block (63). The end of the connecting rod (64) away from the moving block (63) is connected to the mounting frame (71).

3. The rainwater drainage and storage system for a sponge city according to claim 1, characterized in that: The sealing plate (17) driving mechanism (4) includes a driving assembly (41) and a pair of traction assemblies (42). The traction assembly (42) includes a pull rope (421), a set of fixed pulleys (422) and a bracket (423). The set of fixed pulleys (422) is mounted on the bracket (423), and the bracket (423) is mounted on the side wall of the diversion pool (1). One end of the pull rope (421) is mounted on the driving assembly (41), and the other end of the pull rope (421) is mounted on the sealing plate (17). The pull rope (421) overlaps the set of fixed pulleys (422). The driving assembly (41) is used to pull the pull rope (421).

4. A rainwater drainage and storage system for sponge cities according to claim 3, characterized in that: The drive assembly (41) includes a tray (411), a sealing layer (412) on the outer periphery of the tray (411), and a plurality of springs (413) on the bottom surface of the tray (411). One end of the spring (413) away from the tray (411) is located on the bottom of the wastewater tank (1). The sealing layer (412) is in contact with the inner wall of the wastewater tank (1). The pull rope (421) is located on the tray (411).

5. A rainwater drainage and storage system for sponge cities according to claim 1, characterized in that: The side wall of the water storage tank (3) is provided with an installation groove (31). The mud-blocking mechanism (8) includes a rotating shaft (81) and a mud-blocking layer (82) wrapped around the rotating shaft (81). The rotating shaft (81) is rotatably connected in the installation groove (31). One end of the mud-blocking layer (82) is provided on the rotating shaft (81), and the other end of the mud-blocking layer (82) is provided with a connecting rod (83). The mud-blocking drive mechanism (9) is connected to the connecting rod (83). One end of the reset mechanism (10) is located on the rotating shaft (81), and the other end of the reset mechanism (10) is located in the mounting groove (31).

6. A rainwater drainage and storage system for sponge cities according to claim 5, characterized in that: The mud-blocking layer (82) includes a mud-blocking filter screen (821), a protective cloth filter screen (822), and a mud-blocking filter cloth (823), wherein the mud-blocking filter cloth (823) is disposed between the mud-blocking filter screen (821) and the protective cloth filter screen (822).

7. A rainwater drainage and storage system for sponge cities according to claim 5, characterized in that: The reset mechanism (10) includes a spring box (101) and a spring (102) disposed in the spring box (101). One end of the spring (102) away from the spring box (101) is disposed on the rotating shaft (81). The spring box (101) is disposed in the mounting groove (31), and the rotating shaft (81) passes through the spring box (101).

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