Park rainwater waterlogging prevention drainage system

Abstract

The invention discloses a park rainwater waterlogging prevention drainage system, and relates to the technical field of drainage systems. The device comprises a pretreatment box, a first filter screen and a second filter screen are installed in the pretreatment box, meshes of the first filter screen are larger than those of the second filter screen, a plurality of water storage tanks arranged in a linear array are arranged at the lower end of the pretreatment box, every two adjacent water storage tanks are connected through a water pipe, and a first water pump is installed on the side face of each water storage tank; a purifying pipe is installed at a water outlet pipe of the first water pump. According to the application, the maximum utilization of rainwater resources is realized, the problem of shortage of fresh water resources in a region is effectively relieved through scientific and reasonable collection, purification and recycling processes, and meanwhile, the burden on a municipal water supply system is also reduced; according to the method, the extreme weather resistance of the park is remarkably improved, especially in the face of short-time high-intensity rainfall, accumulated water can be rapidly and effectively drained, and the waterlogging risk is greatly reduced.

Description

Technical Field

[0001] The present application relates to the technical field of drainage systems, and in particular to a rainwater drainage system for preventing waterlogging in a park. Background Art

[0002] With the acceleration of urbanization and the increase in the proportion of hardened urban ground, the efficiency of the original natural drainage system has been seriously challenged. Traditional urban drainage systems mostly rely on underground pipe networks, but under extreme weather conditions, such as heavy rainstorms, drainage is often poor due to limited pipe network capacity and insufficient pumping capacity of pumping stations, which in turn leads to serious waterlogging disasters. In recent years, with the improvement of environmental awareness and technological progress, the concept of sponge city construction has gradually been proposed and practiced, and the city's rainwater absorption capacity and retention and regulation functions are improved by constructing green spaces, permeable pavements, rain gardens and other forms of green infrastructure. However, in some specific areas, especially in new development zones or old urban reconstruction projects, it is difficult to achieve the ideal flood control and drainage effect by relying solely on green facilities due to terrain restrictions or construction cost considerations. Therefore, it is imperative to explore more efficient and reasonable rainwater management measures.

[0003] At present, the common methods for rainwater treatment in the park include building large water storage tanks, setting up surface runoff channels, and installing rainwater pumping stations. Large water storage tanks can temporarily store a large amount of rainwater and reduce the pressure on the municipal pipe network, but they occupy a large area, have high construction and maintenance costs, and are prone to waste water resources during long periods of no rainfall; surface runoff channels are usually designed as open channels or culverts, which can guide rainwater to drain out of the park quickly, but they are less adaptable to environments with small slopes or flat land, and are prone to forming water accumulation points; rainwater pumping stations use electric water pumps to forcibly pump accumulated water to external rivers and lakes. They have strong pumping and drainage capabilities and are suitable for low-lying areas, but they have high energy consumption and large initial equipment investment. These three methods have their own advantages and disadvantages, but in actual applications, it is often necessary to comprehensively consider factors such as the geographical environment and economic budget to select the most appropriate combination of solutions.

[0004] Although there are many rainwater management systems available, there are still many limitations. First, most of these systems focus on the realization of a single function, lack overall coordination and flexibility, and cannot cope with complex and changing climate conditions; second, most solutions fail to make full use of rainwater resources, but simply exclude them, which not only increases operating costs but also causes potential waste of water resources; finally, for old communities, due to the shortage of land resources, it is difficult to find enough space for the construction or expansion of rainwater facilities, which greatly limits the application of existing technologies. Summary of the invention

[0005] The purpose of this application is to solve the limitations of existing rainwater drainage methods in parks. Most solutions fail to fully utilize rainwater resources, but simply exclude them, which not only increases operating costs but also causes potential waste of water resources. This application provides a rainwater drainage system for preventing waterlogging in a park.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: A rainwater drainage system for preventing waterlogging in a park comprises a pretreatment box, wherein a filter screen 1 and a filter screen 2 are installed inside the pretreatment box, the mesh of the filter screen 1 is larger than that of the filter screen 2, a plurality of water storage tanks arranged in a straight line array are arranged at the lower end of the pretreatment box, two adjacent water storage tanks are connected by a water pipe, a water pump 1 is installed on the side of the water storage tank, a purification pipe is installed at the outlet pipe of the water pump 1, an activated carbon adsorber is fixed at the end of the purification pipe away from the water pump 1, a delivery pipe is installed at the end of the activated carbon adsorber away from the purification pipe, a municipal rainwater pipe and a municipal sewage pipe are arranged on the side of the water storage tank, the water storage tank and the municipal rainwater pipe are connected by a drainage pipe, a sewage pump is installed between the water storage tank and the municipal sewage pipe, a controller is arranged on the side of the pretreatment box, the controller is electrically connected to the water pump 1, and a cleaning structure is arranged on the pretreatment box.

[0007] By adopting the above technical solution, when it rains, rainwater enters the pretreatment box, is filtered by filter mesh 1 and filter mesh 2, and then enters the water storage tank. When the water level reaches the preset value, the purification and recovery program is started, and the water in the water storage tank is pumped out by water pump 1. The pumped water will first enter the purification pipe. After entering the purification pipe, the filtered and purified water will enter the activated carbon adsorber. The purified water is sent to the domestic water storage equipment through the delivery pipe for domestic water use, thereby achieving the purpose of reusing water resources and reducing water resource waste. When the rain is heavy, the water storage tank keeps storing water, and the rainwater will be discharged from the drain pipe and enter the municipal rainwater pipe to achieve the discharge of rainwater. When the rain is heavier and lasts longer, there is also more rainwater in the municipal rainwater pipe, so that the water in the municipal rainwater pipe is recharged into the drain pipe. At this time, the electric flap valve is controlled to be closed, so as to reduce the recharge of rainwater in the municipal rainwater pipe. At the same time, the sewage pump starts to work and pumps the rainwater in the water storage tank into the municipal sewage pipe for discharge. Through this drainage system, accumulated water can be drained quickly and effectively, greatly reducing the risk of waterlogging.

[0008] Furthermore, an electric flap valve is installed on the drain pipe, the controller is electrically connected to the electric flap valve, a swing plate is hinged inside the drain pipe, a pressure sensor is installed inside the water pipe, and the pressure sensor is electrically connected to the controller.

[0009] By adopting the above technical solution, when rainwater is recharged, the swing plate will squeeze the pressure sensor, so that the controller controls the electric flap valve to close, thereby reducing the recharge of rainwater.

[0010] Furthermore, a quartz sand layer is fixed inside the purification tube, an anthracite layer is arranged on the side of the quartz sand layer, and a manganese sand layer is arranged on the side of the anthracite layer.

[0011] By adopting the above technical solution, the filtering effect of rainwater can be improved through multi-layer filtration, so that it can be put into better use.

[0012] Furthermore, a liquid level sensor is installed inside the water storage tank, turbidity sensors are installed inside the water storage tank and inside the delivery pipe, and the controller is connected to the liquid level sensor and the turbidity sensor.

[0013] By adopting the above technical solution, the liquid level sensor can monitor the water level inside the storage tank, thereby better performing subsequent recovery operations.

[0014] Furthermore, the cleaning structure includes a mounting bar installed inside the pretreatment box, a cleaning brush is fixed to the lower end of the mounting bar, the cleaning brush is in contact with the filter screen, and a driving assembly is arranged on the pretreatment box.

[0015] By adopting the above technical solution, the driving component drives the installation bar to move, thereby driving the cleaning brush to move. The movement of the cleaning brush can clean the filter net 1, which can reduce the clogging of the filter net mesh caused by debris, and is more conducive to filtering rainwater.

[0016] Furthermore, the driving assembly comprises a driving motor fixed to a side of the pretreatment box, an output end of the driving motor extends into the interior of the pretreatment box and is fixed with a threaded rod, and a moving block is threadedly connected to the threaded rod.

[0017] By adopting the above technical solution, the threaded rod is driven to rotate by the driving motor, so that the moving block is subjected to force, thereby achieving the function of driving the installation bar to move.

[0018] Furthermore, a guide rod is fixed inside the pretreatment box, a guide block is slidably sleeved on the guide rod, and the guide block is fixedly connected to the mounting bar.

[0019] By adopting the above technical solution, the guide rod and the guide block play a role of guidance and further support, so that the installation bar moves smoothly.

[0020] Furthermore, the movable block is rotatably connected to a mounting shaft, the other end of the mounting shaft is rotatably connected to the guide block, a roller brush is fixed on the mounting shaft, and the roller brush is in contact with the filter screen.

[0021] By adopting the above technical solution, the cleaning effect of the filter screen 1 can be improved by using the roller brush, which is more conducive to the passage of rainwater.

[0022] Furthermore, a connecting bar is fixed to the inner wall of the pretreatment box, a rack is fixed to the connecting bar, and a gear meshing with the rack is fixed to the end of the installation shaft.

[0023] By adopting the above technical solution, the gear is restricted by the rack, so that the gear rotates, thereby playing the role of driving the roller brush.

[0024] Furthermore, a drainage groove is provided between one end of the filter screen and the inner wall of the pretreatment box, a collecting box is fixed at a position of the inner wall of the pretreatment box corresponding to the drainage groove, and the bottom of the collecting box is hollow.

[0025] By adopting the above technical solution, the debris on the filter screen 1 can enter the interior of the collection box through the debris discharge groove, thereby realizing the collection of the debris.

[0026] In summary, the present application includes at least one of the following beneficial effects: 1. In this application, during rainy weather, rainwater collected from various places enters the pretreatment box, and the debris in the rainwater is filtered through the pretreatment box. The filtered water enters the water storage tank for storage. When the water level reaches the preset value, turn on the water pump 1, and pump out the water in the water storage tank through the water pump 1. The pumped water will first enter the purification pipe, and then enter the activated carbon adsorber after entering the purification pipe, and gradually remove the suspended matter, organic pollutants and other harmful components. Finally, the purified water is sent to the domestic water storage equipment through the delivery pipe for domestic water supply, realizing the maximum utilization of rainwater resources. Through the scientific and reasonable collection, purification and reuse process, the problem of fresh water shortage in the region is effectively alleviated, and the burden on the municipal water supply system is also reduced. When the rain is heavy, the water storage tank keeps storing water, and the water will be discharged from the drain pipe, and the discharged water enters the municipal rainwater pipe to realize the discharge of rainwater. When the rain is heavier and lasts longer, the electric flap valve is controlled to close, thereby reducing the backflow of rainwater inside the municipal rainwater pipe. At the same time, the controller sends a control signal to the sewage pump. After receiving the signal, the sewage pump starts working and pumps the rainwater inside the water storage tank into the municipal sewage pipe for discharge. Through this drainage system, the park's ability to resist extreme weather has been significantly improved, especially in the face of short-term high-intensity precipitation, the accumulated water can be quickly and effectively discharged, greatly reducing the risk of waterlogging. In addition, the drainage system occupies a relatively small area and has strong adaptability. It is suitable for the planning and layout of new projects and is convenient for the upgrading and transformation of old facilities. It has good promotion prospects and social and economic benefits.

[0027] 2. In the present application, during the process of transporting purified water, the turbidity sensor inside the delivery pipe can monitor the turbidity of the purified water in real time. When the turbidity of the water is higher than the preset value, a signal will be sent to the controller, which will send the data to the background through the controller and control the water pump to stop working. At this time, it means that the purification effect of the purification pipe and the activated carbon adsorber is reduced and needs to be cleaned or replaced. When the water inside the municipal rainwater pipe is recharged into the drain pipe, the swing plate is impacted by the recharged water flow and swings toward the water storage tank. The pressure sensor will be squeezed during the swinging, and the pressure sensor will send a signal to the controller under the force. After receiving the signal, the controller controls the electric flap valve to close. At the same time, the controller sends a control signal to the sewage pump, thereby realizing the monitoring of rainwater recharge and further reducing the possibility of waterlogging.

[0028] 3. When the pretreatment box filters rainwater for a long time, large pieces of debris on the filter mesh 1 gradually accumulate, causing blockage in the mesh of the filter mesh 1. At this time, the filter mesh 1 needs to be cleaned. When cleaning, the controller controls the drive motor to work, and the program is set to make the output end of the drive motor rotate back and forth. When the drive motor works, it will drive the threaded rod to rotate. When the threaded rod rotates, the guide block and the guide rod make the installation bar drive the cleaning brush to move back and forth on the filter mesh 1. The cleaning brush moves to sweep down the debris accumulated on the filter mesh 1 and sweep it into the collection box to achieve the cleaning of the filter mesh 1. By cleaning the filter mesh 1, the debris blocked in the mesh of the filter mesh 1 is swept down, thereby improving the passing rate of the rainwater on the filter mesh 1 and reducing the impact on the discharge of rainwater. When cleaning, only manual remote control is required, and there is no need to go to the site in the rain for cleaning. When the rain is over, the debris inside the collection box can be cleaned on site for the next use.

[0029] 4. When the threaded rod drives the mounting bar and the cleaning brush to clean the filter 1, the mounting bar will drive the mounting shaft to move. At this time, the gear on the mounting shaft is restricted by the rack, so that the mounting shaft rotates. The rotation of the mounting shaft drives the roller brush to rotate. The filter 1 can be further cleaned by the rotation of the roller brush. The rotating roller brush can better clean the debris in the mesh of the filter 1, thereby improving the cleaning effect of the filter 1, improving the cleaning efficiency, and being more conducive to the discharge of rainwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a first three-dimensional structural schematic diagram of the drainage system in this application; Figure 2 is a second three-dimensional structural schematic diagram of the drainage system in this application; Figure 3 It is a schematic diagram of the internal structure of the purification tube in this application; Figure 4is a schematic diagram of the internal structure of the drain pipe in this application; Figure 5 It is a schematic diagram of the internal structure of the water storage tank in this application; Figure 6 It is a schematic diagram of the internal structure of the pretreatment box in this application; Figure 7 This application Figure 6 Enlarged schematic diagram at point A in the middle.

[0031] Description of reference numerals: 1. Pretreatment box; 2. Water storage tank; 3. Purification pipe; 4. Water pump 1; 5. Delivery pipe; 6. Municipal rainwater pipe; 7. Municipal sewage pipe; 8. Drain pipe; 9. Electric flap valve; 10. Controller; 11. Swing plate; 12. Pressure sensor; 13. Sewage pump; 14. Quartz sand layer; 15. Anthracite layer; 16. Manganese sand layer; 17. Filter 1; 18. Filter 2; 19. Mounting strip; 20. Cleaning brush; 21. Moving block; 22. Driving motor; 23. Threaded rod; 24. Guide rod; 25. Guide block; 26. Mounting shaft; 27. Roller brush; 28. Connecting strip; 29. ​​Rack; 30. Gear; 31. Liquid level sensor; 32. Turbidity sensor; 33. Activated carbon adsorber; 34. Collection box. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 —7 further describes this application in detail.

[0033] The embodiment of the present application discloses a rainwater drainage system for preventing waterlogging in a park.

[0034] Reference Figure 1 and Figure 2 A rainwater drainage system for preventing waterlogging in a park includes a pretreatment box 1, which is connected to water pipes arranged at various places. A filter screen 17 and a filter screen 18 are installed inside the pretreatment box 1. The mesh of the filter screen 17 is larger than that of the filter screen 18. A plurality of water storage tanks 2 arranged in a straight line array are arranged at the lower end of the pretreatment box 1. Two adjacent water storage tanks 2 are connected by water pipes. A water pump 4 is installed on the side of the water storage tank 2. A purification pipe 3 is installed at the outlet pipe of the water pump 4. The purification pipe 3 is far away from the water storage tank 2. An activated carbon adsorber 33 is fixed at one end away from the water pump 4, a delivery pipe 5 is installed at one end of the activated carbon adsorber 33 away from the purification pipe 3, a municipal rainwater pipe 6 and a municipal sewage pipe 7 are arranged on the side of the water storage tank 2, the water storage tank 2 and the municipal rainwater pipe 6 are connected by a drainage pipe 8, a sewage pump 13 is installed between the water storage tank 2 and the municipal sewage pipe 7, a controller 10 is arranged on the side of the pretreatment box 1, the controller 10 is electrically connected to the water pump 4, and a cleaning structure is arranged on the pretreatment box 1.

[0035] Reference Figure 2 and Figure 4 Among them, an electric flap valve 9 is installed on the drain pipe 8, the controller 10 is electrically connected to the electric flap valve 9, a swing plate 11 is hinged inside the drain pipe 8, a pressure sensor 12 is installed inside the water pipe, and the pressure sensor 12 is electrically connected to the controller 10.

[0036] Reference Figure 3 In addition, a quartz sand layer 14 is fixed inside the purification tube 3 , an anthracite layer 15 is arranged on the side of the quartz sand layer 14 , and a manganese sand layer 16 is arranged on the side of the anthracite layer 15 .

[0037] Reference Figure 5 In addition, a liquid level sensor 31 is installed inside the water storage tank 2, turbidity sensors are installed inside the water storage tank 2 and inside the delivery pipe 5, and the controller 10 is connected with the liquid level sensor 31 and the turbidity sensor 32.

[0038] When it rains, the runoff water generated on the surfaces of roofs, roads, etc. will enter the pretreatment box 1 through the water pipes arranged on the roofs, roads, etc. After entering the pretreatment box 1, the water will first pass through the filter screen 17 to initially filter out larger impurities, and then enter the filter screen 2 18 to further filter out tiny particles. The rainwater filtered by the filter screen 17 and the filter screen 2 18 will enter the water storage tank 2. The liquid level sensor 31 inside the water storage tank 2 can detect the water level inside the water storage tank 2. When the water level reaches the preset value, the purification and recovery program is started. At this time, the water pump 14 is turned on to pump the water inside the water storage tank 2 out through the water pump 14. The pumped water will first enter the purification pipe 3. After entering the purification pipe 3, it will be filtered and purified by the quartz sand layer 14, the anthracite layer 15, and the manganese sand layer 16 in turn. The filtered and purified water then enters the activated carbon adsorber 33 and passes through The activated carbon particles inside the activated carbon adsorber 33 purify the water again. Under the action of the quartz sand layer 14, the anthracite layer 15, the manganese sand layer 16 and the activated carbon adsorber 33, the suspended matter, organic pollutants and other harmful components are gradually removed, and finally converted into a clean water source that meets the reuse standards. The purified water is sent to the domestic water storage equipment through the delivery pipe 5 for domestic water supply, thereby achieving the purpose of reusing water resources and reducing the waste of water resources. In the process of transporting the purified water, the turbidity sensor inside the delivery pipe 5 can monitor the turbidity of the purified water in real time. When the turbidity of the water is higher than the preset value, a signal will be sent to the controller 10, and the data will be sent to the background through the controller 10, and the water pump 4 will be controlled to stop working. At this time, it means that the purification effect of the purification pipe 3 and the activated carbon adsorber 33 is reduced and needs to be cleaned or replaced.

[0039] When the rain is heavy, the water tank 2 continuously stores water. When the water level inside the water tank 2 is higher than the height of the drain pipe 8 installed on its side, the water will be discharged from the drain pipe 8, and the discharged water will enter the municipal rainwater pipe 6 to realize the discharge of rainwater, thereby reducing the situation of waterlogging. When rainwater enters the drainage pipe 8, the swing plate 11 installed inside it will be impacted by water and will move toward the direction of the municipal rainwater pipe 6. When the rainwater is heavier and lasts longer, there will be more rainwater inside the municipal rainwater pipe 6, so that the water inside the municipal rainwater pipe 6 will be recharged into the drainage pipe 8. At this time, the swing plate 11 will be impacted by the recharged water flow and swing toward the direction of the water storage tank 2. When swinging, it will squeeze the pressure sensor 12. The pressure sensor 12 is forced to send a signal to the controller 10. After receiving the signal, the controller 10 controls the electric flap valve 9 to close, thereby reducing the recharge of rainwater inside the municipal rainwater pipe 6. At the same time, the controller 10 sends a control signal to the sewage pump 13. After receiving the signal, the sewage pump 13 starts to work and pumps the rainwater inside the water storage tank 2 into the municipal sewage pipe 7 for discharge. Through this drainage system, the ability of the park to resist extreme weather is significantly improved. In particular, when facing short-term high-intensity precipitation, the accumulated water can be quickly and effectively discharged, greatly reducing the risk of waterlogging. Moreover, the drainage system occupies a relatively small area and has strong adaptability. It is suitable for the planning and layout of new projects and is convenient for upgrading and renovation of old facilities. It has good promotion prospects and socio-economic benefits.

[0040] Reference Figure 6 and Figure 7 The cleaning structure includes a mounting bar 19 installed inside the pretreatment box 1, a cleaning brush 20 is fixed to the lower end of the mounting bar 19, the cleaning brush 20 is in contact with the filter screen 17, and a driving assembly is provided on the pretreatment box 1.

[0041] The driving assembly includes a driving motor 22 fixed to the side of the pretreatment box 1 , the output end of the driving motor 22 extends into the pretreatment box 1 and is fixed with a threaded rod 23 , and the moving block 21 is threadedly connected to the threaded rod 23 .

[0042] In addition, a guide rod 24 is fixed inside the pretreatment box 1 , and a guide block 25 is slidably sleeved on the guide rod 24 , and the guide block 25 is fixedly connected to the mounting bar 19 .

[0043] Furthermore, impurity drain grooves are provided between the two ends of the filter screen 17 and the inner wall of the pretreatment box 1, and a collecting box 34 is fixed at a position of the inner wall of the pretreatment box 1 corresponding to the impurity drain grooves, and the bottom of the collecting box 34 is hollow.

[0044] When the pretreatment box 1 filters rainwater for a long time, large pieces of debris on the filter screen 17 gradually accumulate, causing blockage in the mesh of the filter screen 17, thereby affecting the speed at which rainwater passes through the filter screen 17, and further affecting the storage and discharge of rainwater. At this time, the filter screen 17 needs to be cleaned. During cleaning, the controller 10 controls the drive motor 22 to work, and the output end of the drive motor 22 is set to rotate back and forth. When the drive motor 22 works, it will drive the threaded rod 23 to rotate. When the threaded rod 23 rotates, the moving block 21 is subjected to force. The force on the moving block 21 causes the mounting bar 19 to be subjected to force. The force on the mounting bar 19 causes the guide block 25 to be subjected to force. The guide block 25 is subjected to force and is restricted by the guide rod 24, thereby moving on the threaded rod 23. When the mounting bar 19 moves, it drives the cleaning brush to move back and forth on the filter screen 17. The cleaning brush moves to sweep down the debris accumulated on the filter screen 17 and sweep it into the collection box 34, thereby cleaning the filter screen 17. By cleaning the filter 17, the debris that is clogged in the mesh of the filter 17 can be swept down, thereby increasing the rate at which rainwater passes through the filter 17 and reducing the impact on the discharge of rainwater. The cleaning only requires manual remote control, and there is no need to go to the site in the rain for cleaning. When the rain stops, the debris inside the collection box 34 can be cleaned on site for easy use next time.

[0045] Reference Figure 6 and Figure 7 The moving block 21 is rotatably connected with a mounting shaft 26, and the other end of the mounting shaft 26 is rotatably connected with the guide block 25. A roller brush 27 is fixed on the mounting shaft 26, and the roller brush 27 fits with the filter screen 17.

[0046] A connecting bar 28 is fixed to the inner wall of the pretreatment box 1 , a rack 29 is fixed to the connecting bar 28 , and a gear 30 meshing with the rack 29 is fixed to the end of the mounting shaft 26 .

[0047] When the threaded rod 23 drives the mounting bar 19 and the cleaning brush to clean the filter 17, the mounting bar 19 will drive the mounting shaft 26 to move. At this time, the gear 30 on the mounting shaft 26 is restricted by the rack 29, so that the mounting shaft 26 rotates. The rotation of the mounting shaft 26 drives the roller brush 27 to rotate. The filter 17 can be further cleaned by the rotation of the roller brush 27. The rotating roller brush 27 can better clean the debris in the mesh of the filter 17, thereby improving the cleaning effect of the filter 17, improving the cleaning efficiency, and being more conducive to the discharge of rainwater.

[0048] Working principle: When encountering rainwater, the runoff water generated on the surface of the roof, road and the like will enter the pretreatment box 1 through the water pipes arranged on the roof, road and the like. After entering the pretreatment box 1, the water flow will first pass through the filter screen 17 to initially filter out larger impurities, and then enter the filter screen 2 18 to further filter out tiny particles. The rainwater filtered by the filter screen 17 and the filter screen 2 18 will enter the water storage tank 2. The liquid level sensor 31 inside the water storage tank 2 can detect the water level inside the water storage tank 2. When the water level reaches the preset value, the purification and recovery program is started. At this time, the controller 10 turns on the water pump 4, and the water inside the water storage tank 2 is pumped out by the water pump 4. The pumped water will first enter the purification pipe 3. After entering the purification pipe 3, it will pass through the quartz sand layer 14, the anthracite layer 15, and the manganese sand layer 16 in turn for filtration and purification. The filtered and purified water then enters the activated carbon adsorber 33 to purify the rainwater. The purified water is sent to the domestic water storage equipment through the delivery pipe 5 for domestic water supply. In the process of transporting the purified water, the turbidity sensor inside the delivery pipe 5 can monitor the turbidity of the purified water in real time. When the turbidity of the water is higher than the preset value, a signal will be sent to the controller 10, and the controller 10 will send the data to the background and control the water pump 4 to stop working. At this time, it means that the purification effect of the purification pipe 3 and the activated carbon adsorber 33 is reduced and needs to be cleaned or replaced. When the rain is heavy, the water tank 2 continuously stores water. When the water level inside the water tank 2 is higher than the height of the drain pipe 8 installed on its side, the water will be discharged from the drain pipe 8, and the discharged water will enter the municipal rainwater pipe 6 to realize the discharge of rainwater, thereby reducing the situation of waterlogging. When rainwater enters the drain pipe 8, the swing plate 11 installed inside it will be impacted by the water and will move toward the direction of the municipal rainwater pipe 6. When the rain is heavier and lasts longer, there will be more rainwater inside the municipal rainwater pipe 6, which will cause the water inside the municipal rainwater pipe 6 to re-inject into the drain pipe 8. At this time, the swing plate 11 will be impacted by the re-injected water flow and will swing toward the water storage tank 2. When swinging, it will squeeze the pressure sensor 12. The pressure sensor 12 will send a signal to the controller 10 under the force. After receiving the signal, the controller 10 controls the electric flap valve 9 to close, thereby reducing the re-injection of rainwater inside the municipal rainwater pipe 6. At the same time, the controller 10 sends a control signal to the sewage pump 13. After receiving the signal, the sewage pump 13 starts to work and pumps the rainwater inside the water storage tank 2 into the municipal sewage pipe 7 for discharge.

[0049] When the pretreatment box 1 filters rainwater for a long time, large pieces of debris on the filter screen 17 gradually accumulate, causing blockage in the mesh of the filter screen 17, thereby affecting the speed at which rainwater passes through the filter screen 17, and further affecting the storage and discharge of rainwater. At this time, the filter screen 17 needs to be cleaned. During cleaning, the controller 10 controls the drive motor 22 to work, and the program is set to make the output end of the drive motor 22 rotate back and forth. When the drive motor 22 works, it will drive the threaded rod 23 to rotate. When the threaded rod 23 rotates, the moving block 21 is stressed, and the moving block 21 is stressed so that the mounting bar 19 is stressed. The mounting bar 19 is stressed so that the guide block 25 is stressed, and the guide block 25 is stressed and restricted by the guide rod 24. When the threaded rod 23 drives the mounting bar 19 and the cleaning brush to clean the filter 17, the mounting bar 19 drives the mounting shaft 26 to move. At this time, the gear 30 on the mounting shaft 26 is restricted by the rack 29, so that the mounting shaft 26 rotates. The rotation of the mounting shaft 26 drives the roller brush 27 to rotate. The filter 17 can be further cleaned by the rotation of the roller brush 27, and the debris at the mesh of the filter 17 can be better cleaned by the rotating roller brush 27.

Claims

1. A rainwater drainage system for preventing waterlogging in a park, comprising a pretreatment tank (1), characterized in that: A filter screen 1 (17) and a filter screen 2 (18) are installed inside the pretreatment box (1). The mesh of the filter screen 1 (17) is larger than that of the filter screen 2 (18). A plurality of water storage tanks (2) arranged in a straight line array are arranged at the lower end of the pretreatment box (1). Two adjacent water storage tanks (2) are connected by water pipes. A water pump 1 (4) is installed on the side of the water storage tank (2). A purification pipe (3) is installed at the outlet pipe of the water pump 1 (4). An activated carbon adsorber (33) is fixed at one end of the purification pipe (3) away from the water pump 1 (4). A delivery pipe (5) is installed at one end of the carbon adsorber (33) away from the purification pipe (3); a municipal rainwater pipe (6) and a municipal sewage pipe (7) are arranged on the side of the water storage tank (2); the water storage tank (2) and the municipal rainwater pipe (6) are connected via a drainage pipe (8); a sewage pump (13) is installed between the water storage tank (2) and the municipal sewage pipe (7); a controller (10) is arranged on the side of the pretreatment box (1); the controller (10) is electrically connected to a water pump (4); and a cleaning structure is arranged on the pretreatment box (1).

2. A rainwater drainage system for preventing waterlogging in a park according to claim 1, characterized in that: An electric flap valve (9) is installed on the drainage pipe (8), the controller (10) is electrically connected to the electric flap valve (9), a swing plate (11) is hinged inside the drainage pipe (8), a pressure sensor (12) is installed inside the water pipe, and the pressure sensor (12) is electrically connected to the controller (10).

3. A rainwater drainage system for preventing waterlogging in a park according to claim 1, characterized in that: A quartz sand layer (14) is fixed inside the purification tube (3), an anthracite layer (15) is arranged on the side of the quartz sand layer (14), and a manganese sand layer (16) is arranged on the side of the anthracite layer (15).

4. The rainwater drainage system for preventing waterlogging in a park according to claim 1, characterized in that: A liquid level sensor (31) is installed inside the water storage tank (2), turbidity sensors are installed inside the water storage tank (2) and inside the delivery pipe (5), and the controller (10) is connected to the liquid level sensor (31) and the turbidity sensor (32).

5. The rainwater drainage system for preventing waterlogging in a park according to claim 1, characterized in that: The cleaning structure comprises a mounting bar (19) mounted inside the pretreatment box (1), a cleaning brush (20) being fixed to the lower end of the mounting bar (19), the cleaning brush (20) being in contact with a filter screen (17), and a driving assembly being arranged on the pretreatment box (1).

6. A rainwater drainage system for preventing waterlogging in a park according to claim 5, characterized in that: The drive assembly comprises a drive motor (22) fixed to a side of the pretreatment box (1); an output end of the drive motor (22) extends into the interior of the pretreatment box (1) and is fixed with a threaded rod (23); a moving block (21) is threadedly connected to the threaded rod (23).

7. The rainwater drainage system for preventing waterlogging in a park according to claim 5, characterized in that: A guide rod (24) is fixed inside the pretreatment box (1), a guide block (25) is slidably sleeved on the guide rod (24), and the guide block (25) is fixedly connected to the mounting bar (19).

8. The rainwater drainage system for preventing waterlogging in a park according to claim 6, characterized in that: The movable block (21) is rotatably connected to a mounting shaft (26), the other end of the mounting shaft (26) is rotatably connected to a guide block (25), a roller brush (27) is fixed to the mounting shaft (26), and the roller brush (27) is in contact with the filter screen 1 (17).

9. A rainwater drainage system for preventing waterlogging in a park according to claim 8, characterized in that: A connecting strip (28) is fixed to the inner wall of the pretreatment box (1), a rack (29) is fixed to the connecting strip (28), and a gear (30) meshing with the rack (29) is fixed to the end of the installation shaft (26).

10. The rainwater drainage system for preventing waterlogging in a park according to claim 5, characterized in that: A debris drainage groove is provided between the two ends of the filter screen 1 (17) and the inner wall of the pretreatment box (1), and a collection box (34) is fixed at a position on the inner wall of the pretreatment box (1) corresponding to the debris drainage groove, and the bottom of the collection box (34) is hollow.

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