Sponge city rainwater collection and purification utilization system

Abstract

The application discloses a sponge city rainwater collection, purification and utilization system, which comprises a rainwater collection unit, a sewage interception unit, a purification unit, a recycling unit and a clean water pool. The sewage interception unit comprises a treatment well and an impurity collection unit. The end of a drainage pipeline is in communication with the treatment well, and the impurity collection unit is arranged in the treatment well. The purification unit comprises a water storage pool and a treatment agent control unit. A water delivery pipe is connected between the water storage pool and the treatment well, and the treatment agent control unit is arranged on the water delivery pipe. The recycling unit is used for discharging water with up-to-standard quality into the clean water pool. The sponge city rainwater collection, purification and utilization system can effectively collect impurities in rainwater, effectively reduce the amount of impurities entering the water delivery pipe, and effectively control the amount of treatment agent added according to the rainfall, so as to prevent the condition of insufficient addition of treatment agent and effectively improve the rainwater treatment quality.

Description

Technical Field

[0001] This invention relates to the field of rainwater harvesting and treatment systems, specifically to a rainwater harvesting, purification, and utilization system for sponge cities. Background Technology

[0002] A sponge city refers to a city that, like a sponge, has good "elasticity" in adapting to environmental changes and responding to natural disasters. When it rains, it can absorb, store, infiltrate, and purify rainwater. When needed, it can release and utilize the stored water, achieving the goal of allowing rainwater to migrate freely in the city. It can make full use of the natural ecological underlying surface for rainwater infiltration, retention, storage, and discharge, and can also naturally purify water quality through vegetation, soil, and wetlands. Through a combination of natural and artificial small-scale multi-source sponge design methods, it can beautify the city while controlling the runoff and pollution generated by rainwater, thereby alleviating the pressure of urban flooding.

[0003] Rainwater harvesting and utilization systems are a crucial component of sponge city construction. This refers to the process where rainwater within a site is purified through sponge-like facilities (the storage tank is an underground structure, with the upper part restored to natural landscape forms such as green spaces). Infiltrated and overflowing rainwater then enters the rainwater drainage system and is stored in the collection and reuse system. The collected rainwater is used for irrigation systems within parks, meeting the goal of rainwater resource reuse. During the dry season, river water is drawn from the river, purified, and stored in storage tanks to supplement the irrigation system.

[0004] After rainwater is effectively collected, it needs to be treated according to relevant water quality standards. It can only be reused after the treated water meets the standards. During heavy rain or thunderstorms, the large rainfall volume leads to a corresponding increase in the processing capacity of the rainwater collection and treatment system. After treating rainwater under these weather conditions, it was found that black impurities and other pollutants often remain in the storage tanks. The main reason is that the dosage of treatment additives such as disinfectants and flocculants was not adjusted in time (as the processing volume increases, the dosage of treatment agents should be increased accordingly), resulting in the impurities in the rainwater not being effectively treated, thus causing the treated water quality to fail to meet relevant standards. Therefore, we propose a sponge city rainwater collection, purification, and utilization system. Summary of the Invention

[0005] The purpose of this invention is to provide a rainwater harvesting, purification and utilization system for sponge cities to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sponge city rainwater harvesting, purification, and utilization system, comprising a rainwater harvesting unit, a sewage interception unit, a purification unit, a recycling unit, and a clear water tank. The rainwater harvesting unit consists of multiple diversion pipes, which are used to collect rainwater and discharge it into the sewage interception unit for treatment. The sewage interception unit includes a treatment well and an impurity collection unit. The end of the diversion pipe is connected to the treatment well. The impurity collection unit is located inside the treatment well and is used to intercept and store impurities in the rainwater. The purification unit includes a water storage tank and a treatment agent control unit. A water supply pipe connects the water storage tank and the treatment well. The treatment agent control unit is located on the water supply pipe and is used to control the amount of treatment agent added to the water storage tank. The recycling unit is used to discharge the compliant water into the clear water tank.

[0007] Preferably, the impurity collection unit includes a cylindrical filter screen disposed inside the treatment well. The cylindrical filter screen further includes a rainwater filtration area, an impurity storage area, and a rainwater re-discharge area. The rainwater filtration area is provided with a baffle for placing impurities, and a drive unit is provided at the bottom of the baffle. The drive unit is used to discharge the impurities on the baffle into the impurity storage area for storage. The impurity storage area is a conical filter screen, and a drain pipe is connected to the rainwater re-discharge area for communication with the water supply pipe. A one-way valve is installed at the connection between the drain pipe and the water supply pipe.

[0008] Preferably, the baffle is arranged in a sloping shape inside the rainwater filtration area, and multiple telescopic columns are installed inside the rainwater filtration area, with the ends of the telescopic columns connected to the upper surface of the baffle.

[0009] Preferably, the driving unit includes a bracket, a slider, a hinge assembly, a sleeve assembly, a magnetic block, a first magnet assembly, and a second magnet assembly.

[0010] The bracket is installed at the bottom of the baffle, and a rotating shaft for rotatably connecting with it is installed on the bracket;

[0011] The slider is installed at both ends of the rotating shaft, and the inner wall of the rainwater filtration area is provided in a groove for sliding connection with the slider;

[0012] The hinge assembly is disposed on the baffle and there are two sets of them. The hinge assembly is disposed near both ends of the baffle and a cylindrical assembly is installed on the hinge assembly.

[0013] The sleeve assembly is installed on the inner wall of the rainwater filtration area and two sets are installed. The cylindrical assembly is slidably connected to the inner wall of the sleeve assembly.

[0014] The magnetic block is disposed at the end of the cylindrical assembly;

[0015] The first magnet group is disposed inside one of the sleeve groups and is in a state of mutual attraction with the magnetic block;

[0016] The second magnet group is disposed within another set of sleeve groups and is in a state of mutual repulsion with the magnetic block.

[0017] Preferably, the treatment agent control unit includes a frame disposed on the water supply pipe, and a drive plate disposed inside the frame, wherein the drive plate is slidably connected to the inner wall of the frame, the drive plate is provided with a slot, and a spherical contact member is provided on one side of the drive plate, a power member is provided inside the water supply pipe for directional movement of the drive plate by the impact force of the water flow, a cavity is provided on one side of the frame, and a response member is disposed inside the cavity.

[0018] Preferably, the power component includes a force-bearing plate disposed inside the water pipe. The force-bearing plate is composed of two semi-circular plates, and multiple columns are installed on each of the two semi-circular plates. The multiple columns are equidistantly distributed on the two semi-circular plates, and the multiple columns on the two semi-circular plates are staggered at equal intervals. A transmission column is provided at the end of one of the columns on the semi-circular plate, and a connecting plate is provided at the end of both the transmission column and the column on the other semi-circular plate. The connecting plates are symmetrical, and a limit post is provided on the connecting plate. A limit groove for sliding connection with the limit post is provided on the drive plate.

[0019] Preferably, the responding element includes a control button disposed inside the cavity, and multiple control buttons are disposed inside the cavity. A support plate is disposed on the inner wall of the cavity, and multiple arc-shaped action plates are disposed on the side wall of the frame. The arc-shaped action plates are slidably connected to the side wall of the frame, and a through post is disposed on the arc-shaped action plate. The end of the through post penetrates the inner wall of the support plate and extends to one side of the control button. A spring body is connected between the end of the arc-shaped action plate and the side wall of the support plate.

[0020] Preferably, the water storage tank is equipped with a pipeline body for adding treatment agents, and a control valve is provided on the pipeline body.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention utilizes an impurity collection unit to effectively collect impurities in rainwater, thereby reducing the amount of impurities entering the water supply pipe. Furthermore, the treatment agent control unit effectively controls the amount of treatment agent added based on rainfall, preventing insufficient treatment agent addition and thus significantly improving the quality of rainwater treatment.

[0023] 2. The present invention utilizes a drive component to effectively collect and store impurities in rainwater, preventing impurities in the next batch of rainwater from colliding with the impurities in that batch with the water flow. This prevents small particles generated by collisions between impurities from entering the water pipe, effectively avoiding the impact of impurities on subsequent treatment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram illustrating the structural principle of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 3 This is a partial structural diagram of the present invention;

[0027] Figure 4 This is a schematic diagram showing the separation of the sewage interception unit structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the sewage interception unit structure of the present invention;

[0029] Figure 6 This is a partial cross-sectional schematic diagram of the sewage interception unit structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the driving unit structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the separation of the cylindrical filter screen structure of the present invention;

[0032] Figure 9 This is a schematic diagram of the purification unit structure of the present invention;

[0033] Figure 10 This is a schematic diagram of the treatment agent control unit structure of the present invention;

[0034] Figure 11 This is a schematic diagram of the power component structure of the present invention.

[0035] Figure 12 This is a schematic diagram showing the separation of the power component structure of the present invention;

[0036] Figure 13 This is a top view schematic diagram of the treatment agent control unit structure of the present invention;

[0037] Figure 14 For the present invention Figure 13 Enlarged schematic diagram of the structure of region A in the middle.

[0038] In the diagram: 1-Rainwater harvesting unit; 2-Sewage interception unit; 3-Purification unit; 4-Recycling unit; 5-Clear water tank; 6-Impurity collection unit; 7-Treatment agent control unit; 8-Pipe body; 9-Control valve; 11-Drainage pipe; 21-Treatment well; 31-Water storage tank; 32-Water delivery pipe; 61-Cylindrical filter screen; 62-Rainwater filtration area; 63-Impurity storage area; 64-Rainwater re-discharge area; 65-Baffle; 66-Drive unit; 67-Drainage pipe; 68-Check valve; 69-Telescopic column; 661-Bracket; 662-Slider; 663-Hinge assembly; 664- Sleeve assembly; 665-Magnetic block; 666-First magnet assembly; 667-Second magnet assembly; 668-Rotating shaft; 669-Groove; 660-Cylinder assembly; 71-Frame; 72-Drive plate; 73-Slotted; 74-Spherical contact element; 75-Power element; 76-Cavity; 77-Response element; 751-Force plate; 752-Semi-circular plate; 753-Column; 754-Transmission column; 755-Connecting plate; 756-Limiting column; 757-Limiting groove; 771-Control button; 772-Support plate; 773-Arc-shaped action plate; 774-Through column; 775-Spring body. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figure 1-13This invention provides a technical solution: a rainwater harvesting, purification, and utilization system for sponge cities. This invention addresses the technical problems in the background art by making corresponding improvements, including a rainwater harvesting unit 1, a sewage interception unit 2, a purification unit 3, a recycling unit 4, and a clear water tank 5. Specifically, rainwater enters the sewage interception unit 2 through the rainwater harvesting unit 1. The sewage interception unit 2 treats impurities in the rainwater and discharges the treated rainwater into the purification unit 3. By adding appropriate disinfectants, flocculants, and other treatment additives to the purification unit 3, the rainwater is further treated. After the treated rainwater meets the standards, it is discharged into the clear water tank 5 through the recycling unit 4 for storage, so that the water quality in the clear water tank 5 can be used for subsequent operations. The rainwater harvesting unit 1 consists of multiple drainage pipes 11, with inlets distributed in various areas of the city. During rainfall, rainwater seeps into the ground and enters the sewage interception unit 2 through the drainage pipes. The sewage interception unit 2 includes a treatment well 21 and an impurity collection unit 6. The ends of the drainage pipes 11 are connected to... The treatment well 21 is in a connected state. The impurity collection unit 6 is located inside the treatment well 21 and is used to intercept and store impurities in the rainwater. Since the rainwater carries a large amount of impurities into the treatment well 21 when it enters the diversion pipe 11, the impurity collection unit 6 needs to treat the impurities in the rainwater. The purification unit 3 includes a water storage tank 31 and a treatment agent control unit 7. A water supply pipe 32 connects the water storage tank 31 and the treatment well 21 so that after the impurities are treated, they enter the water storage tank 31 through the water supply pipe 32. The treatment agent control unit 7 is located on the water supply pipe 32 and is used to control the amount of treatment agent added to the water storage tank 31. When the weather in the city is heavy rain or thunderstorms, the initial treatment dosage may not be able to treat a large amount of rainwater. Therefore, under the action of the treatment agent control unit 7, the amount of treatment agent added can be controlled by the amount of rainfall. The treated rainwater is then discharged into the clear water tank 5 for storage through the recycling unit 4 after meeting the standards.

[0041] As a further limitation of the present invention, the impurity collection unit 6 includes a cylindrical filter screen 61 installed inside the treatment well 21. The cylindrical filter screen 61 also includes a rainwater filtration area 62, an impurity storage area 63, and a rainwater re-discharge area 64. A baffle 65 for placing impurities is provided inside the rainwater filtration area 62. The baffle 65 is slidably connected to the inner wall of the rainwater filtration area 62, and the baffle 65 is sloped within the rainwater filtration area 62. The highest point of the baffle 65 is located at the point where the treatment well 21 connects to the diversion pipe 11, and the lowest point is located at the point where the treatment well 21 connects to the water supply pipe 32, so that when water flows into the treatment well 21 through the diversion pipe 11, the water... The water first flows through the highest point of the baffle 65, and then flows into the water supply pipe 32 from the lowest point of the baffle 65. As a result, the impurities accumulate at the lowest point of the baffle 65 and are blocked by the rainwater filtration area 62. Multiple telescopic columns 69 are installed inside the rainwater filtration area 62, and the ends of the telescopic columns 69 are connected to the upper surface of the baffle 65. A drive unit 66 is provided at the bottom of the baffle 65, and the drive unit 66 is used to discharge the impurities on the baffle 65 into the impurity storage area 63 for storage. The impurity storage area 63 is a conical filter screen. A drain pipe 67 is connected to the rainwater discharge area 64 for communication with the water supply pipe 32, and a one-way valve 68 is installed at the connection between the drain pipe 67 and the water supply pipe 32.

[0042] Specifically, when rainwater enters the treatment well 21 (and the cylindrical filter screen 61) through the diversion pipe, the water flow acts on the baffle 65. The baffle 65 descends under the action of the telescopic column 69. Further, the telescopic column 69 is equipped with a spring or other elastic mechanism. Since the telescopic column 69 is existing technology, it is not described in detail in this invention. Impurities in the water flow are blocked by the inner wall of the rainwater filtration area 62, and the water flow enters the water supply pipe 32 from the lowest point of the baffle 65. The impurities are collected at the lowest point of the baffle 65. When there is no water flow or the water flow is small (no rain or the rainfall is greatly reduced), the telescopic column 69 causes the baffle 65 to return to the initial state. During the rising process, the baffle 65 is oriented and angled under the action of the drive unit 66, so that the impurities fall from the lowest point of the baffle 65 into the impurity storage area 63. The rainwater on the impurities or a small amount of rainwater on the baffle 65 falls through the impurity storage area 63 into the rainwater discharge area 64.

[0043] Furthermore, through the structural design of the present invention, impurities on the upper surface of the baffle 65 are collected after each rainfall. This method is adopted to avoid the collision between the current batch of impurities and the next batch of impurities (containing in the water flow). Since the impurities contained in the rainwater (through soil, such as wet soil) will break after being impacted, impurities can easily pass through the rainwater filtration area 62 and enter the water supply pipe 32. Thus, through the structural design of the present invention, the amount of impurities entering the water storage tank 31 can be effectively reduced.

[0044] As a further limitation of the present invention, the drive unit 66 includes a bracket 661 mounted on the bottom of the baffle 65, and a rotating shaft 668 for rotatably connecting with the bracket 661 is mounted on the bracket 661. Slider blocks 662 are fixedly mounted at both ends of the rotating shaft 668, and a groove 669 for sliding connection with the sliders 662 is provided on the inner wall of the rainwater filtration area 62. Thus, when the baffle 65 descends, the bracket 661 moves synchronously with it, and the rotating shaft 668 on the bracket 661 drives the sliders 662 in the groove. The body 669 performs a directional limiting action to allow the baffle 65 to descend in a directional manner. A hinge assembly 663 is installed at the bottom of the baffle 65. Further, two sets of hinge assemblies 663 are installed at the bottom of the baffle 65, each set consisting of two hinge members. The two sets of hinge assemblies 663 are respectively installed at the highest and lowest points of the baffle 65. A cylindrical assembly 660 (corresponding one-to-one with the hinge assembly 663) is installed on each hinge assembly 663 (a single hinge member), and is protected against rainwater... The inner wall of the filtration area 62 is fitted with sleeve assemblies 664, each corresponding to one of the aforementioned hinge assemblies 663. Two sets of each sleeve assembly 664 are provided, with two sleeves in each set. The cylindrical assembly 660 and the sleeve assembly 664 are slidably connected, allowing the cylindrical assembly 660 to be oriented and limited within the sleeve assembly 664 via the hinge assemblies 663 during the descent of the baffle 65. A magnetic block 665 is installed at one end of the cylindrical assembly 660 inside the sleeve assembly 664. One set of sleeve assemblies 664 (the baffle assembly 664...) A first magnet assembly 666 (consisting of two magnets, installed inside the two sleeves) is installed on the inner wall of the bottom of a set of sleeves 664 corresponding to the lowest point of the plate 65. The first magnet assembly 666 attracts the magnetic block 665. A second magnet assembly 667 (same as the first magnet assembly 666) is installed in another set of sleeves 664 (a set of sleeves 664 corresponding to the highest point of the baffle 65). The second magnet assembly 667 repels the magnetic block 665.

[0045] Specifically, when the baffle 65 descends under the force of the water flow, the cylindrical assembly 660 moves synchronously with it under the action of the hinge assembly 663. The magnetic blocks 665 on the cylindrical assembly 660 gradually approach and contact the first magnet assembly 666 and the second magnet assembly 667. When the water flow impact force decreases, the second magnet assembly 667 acts on the magnetic blocks 665, causing the cylindrical assembly 660 to rise rapidly. The cylindrical assembly 660 corresponding to this group is the highest point of the baffle 65, thus causing the baffle 65 to rise rapidly. Meanwhile, the cylindrical assembly 660 corresponding to the lowest point of the baffle 65... The magnetic block 665 is attracted by the first magnet group 666 and rises relatively slowly. Then, the orientation angle is adjusted by the baffle 65 (the bracket 661 at the bottom of the baffle 65 is rotatably connected to the rotating shaft 668, and the two ends of the rotating shaft 668 are slidably connected to the tank 669 through the slider 662). After the baffle 65 is tilted, the impurities at its lowest point fall into the impurity storage area 63 for collection, while the small amount of rainwater contained in the baffle 65 and the impurities falls through the impurity storage area 63 into the rainwater discharge area 64, and enters the water supply pipe 32 through the drain pipe 67.

[0046] As a further limitation of the present invention, the treatment agent control unit 7 includes a frame 71 fixedly installed on the water supply pipe 32, and a drive plate 72 is installed inside the frame 71, wherein the drive plate 72 is slidably connected to the inner wall of the frame 71, the drive plate 72 is provided with a slot 73, and a spherical contact member 74 is fixedly installed on one side of the drive plate 72. A power member 75 is provided inside the water supply pipe 32 for directional movement of the drive plate 72 by the impact force of water flow. A cavity 76 is provided on one side of the frame 71, and a response member 77 is provided inside the cavity 76.

[0047] As attached Figure 10As shown: The power component 75 includes a load-bearing plate 751 disposed inside the water supply pipe 32. The load-bearing plate 751 is composed of two semi-circular plates 752, and multiple columns 753 are installed on each of the two semi-circular plates 752. The multiple columns 753 are equidistantly distributed on the two semi-circular plates 752, and the multiple columns 753 on the two semi-circular plates 752 are equidistantly staggered. Multiple columns 753 are installed on one semi-circular plate 752, and the columns 753 on this semi-circular plate 752 are distributed at equal intervals on the semi-circular plate 752. Columns from the other semi-circular plate 752 are interspersed between the columns 753 on this semi-circular plate 752. 753, and the columns 753 on the other semi-circular plate 752 are also equidistantly distributed. To further explain, a circular column is installed on the column 753 for rotational connection with it, and the circular column is connected to the inner wall of the water pipe 32; a transmission column 754 is installed at the end of the column 753 on one of the semi-circular plates 752, and a connecting plate 755 is installed at the end of both the transmission column 754 and the column 753 on the other semi-circular plate 752, and the connecting plates 755 are symmetrical with each other. A limit column 756 is installed at the other end of the connecting plate 755, and a limit groove 757 for sliding connection with the limit column 756 is symmetrically arranged on the drive plate 72.

[0048] Specifically, when rainfall is heavy, the water flow is greater, which increases the impact force on the load-bearing plate 751, causing the semi-circular plate 752 to rotate in the opposite direction. The connecting plates 755 then move in the opposite direction. The connecting plates 755 are positioned by limiting posts 756, which act on the limiting grooves 757 on the drive plate 72. These limiting grooves 757 then guide the drive plate 72 to move in a directional manner. During its movement, the drive plate 72 drives the spherical contact element 74 to move synchronously. The response element 77 includes multiple control buttons 771 fixedly installed inside the cavity 76, each representing a dosage of the treatment agent. The water storage tank... A pipe body 8 for adding treatment agent is installed on 31, and a control valve 9 is installed on the pipe body 8. The control button 771 is electrically connected to the control valve 9 so that when the control button 771 is pressed, the opening degree of the control valve 9 is corresponding to the opening degree. A support plate 772 is fixedly installed on the inner wall of the cavity 76, and multiple arc-shaped action plates 773 are installed on the side wall of the frame 71. The arc-shaped action plates 773 are slidably connected to the side wall of the frame 71, and a through column 774 is installed on the arc-shaped action plate 773. The end of the through column 774 penetrates the inner wall of the support plate 772 and extends to the side of the control button 771. A spring body 775 is connected between the end of the arc-shaped action plate 773 and the side wall of the support plate 772.

[0049] Specifically, during the directional movement of the spherical contact member 74 along with the drive plate 72, the spherical contact member 74 acts on the arc-shaped action plate 773 to cause it to move in the direction of the movement. The arc-shaped action plate 773 then acts on the control button 771 through the through post 774. At this time, the spring body 775 is in a compressed state. After the control button 771 is touched, it sends a signal to the control valve 9. The amount of treatment agent added is determined according to the number of control valves 9 that are touched. Thus, through the structural design of the present invention, the amount of treatment agent added can be effectively controlled according to the rainfall.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sponge city rainwater collection and purification system, comprising a rainwater collection unit, a sewage interception unit, a purification unit, a recycling unit and a clean water pool, characterized in that: The rainwater collecting unit is composed of a plurality of drainage pipes, and the drainage pipes are used for collecting rainwater and discharging the rainwater into the sewage intercepting unit for treatment; The sewage intercepting unit comprises a treatment well and an impurity collecting unit, the end of the drainage pipe is in communication with the treatment well, and the impurity collecting unit is arranged inside the treatment well and is used for intercepting and storing impurities in the rainwater; The purification unit comprises a water storage tank and a treatment agent control unit, a water delivery pipe is connected between the water storage tank and the treatment well, the treatment agent control unit is arranged on the water delivery pipe, and the treatment agent control unit is used for controlling the amount of treatment agent added into the water storage tank; The recycling unit is used for discharging water of up to standard into a clean water tank; The impurity collecting unit comprises a cylindrical filter screen arranged inside the treatment well, the cylindrical filter screen further comprises a rainwater filtering area, an impurity storage area and a rainwater discharge area, the rainwater filtering area is internally provided with a baffle for placing impurities, a driving unit is arranged at the bottom of the baffle, the driving unit is used for discharging the impurities on the baffle into the impurity storage area for storage, the impurity storage area is a conical filter screen, a drain pipe for being in communication with the water delivery pipe is connected to the rainwater discharge area, and a one-way valve is installed at the communication position of the drain pipe and the water delivery pipe; The driving unit comprises a bracket, a sliding block, a hinge group, a sleeve group, a magnetic block, a first magnet group and a second magnet group, the bracket is installed at the bottom of the baffle, and a rotating shaft for rotating connection is installed on the bracket; The sliding block is installed at both ends of the rotating shaft, and a groove for sliding connection with the sliding block is arranged on the inner wall of the rainwater filtering area; The hinge group is arranged on the baffle and comprises two groups, and the hinge groups are arranged near both ends of the baffle respectively, and a cylinder group is installed on the hinge groups; The sleeve group is installed on the inner wall of the rainwater filtering area and comprises two groups, and the cylinder group and the inner wall of the sleeve group are in sliding connection; The magnetic block is arranged at the end of the cylinder group; The first magnet group is arranged in one of the sleeve groups and is in mutual attraction with the magnetic block; The second magnet group is arranged in the other sleeve group and is in mutual repulsion with the magnetic block; The treatment agent control unit comprises a frame arranged on the water delivery pipe, and a driving plate is arranged inside the frame, the driving plate and the inner wall of the frame are in sliding connection, the driving plate is provided with a slot, a spherical touch piece is arranged on one side of the driving plate, a power piece for enabling the driving plate to perform directional action by water flow impact force is arranged inside the water delivery pipe, a cavity is arranged on one side of the frame, and a response piece is arranged inside the cavity. 2.The sponge city rainwater collection and purification utilization system according to claim 1, characterized in that: The baffle is arranged in a slope shape inside the rainwater filtering area, and a plurality of telescopic columns are installed inside the rainwater filtering area, and the end of the telescopic column is connected to the upper surface of the baffle. 3.The sponge city rainwater collection and purification utilization system according to claim 1, characterized in that: The power part comprises a force receiving plate arranged inside the water conveying pipe, the force receiving plate is composed of two semicircular plates, a plurality of columns are arranged on the two semicircular plates, the plurality of columns are equidistantly distributed on the two semicircular plates, the plurality of columns on the two semicircular plates are equidistantly and staggeredly distributed, the end of the column on one of the semicircular plates is provided with a transmission column, the transmission column and the end of the column on the other semicircular plate are provided with connecting plates, the connecting plates are in a symmetrical state, a limiting column is arranged on the connecting plate, a limiting groove for sliding connection between the limiting column is arranged on the driving plate. 4.The sponge city rainwater collection and purification utilization system according to claim 1, characterized in that: The response part comprises a control button arranged inside the cavity, a plurality of control buttons are arranged inside the cavity, a support plate is arranged on the inner wall of the cavity, a plurality of arc action plates are arranged on the side wall of the frame, the arc action plates are in sliding connection with the side wall of the frame, a penetrating column is arranged on the arc action plate, the end of the penetrating column penetrates the inner wall of the support plate and extends to one side of the control button, a spring body is connected between the end of the arc action plate and the side wall of the support plate. 5.The sponge city rainwater collection and purification utilization system according to claim 1, characterized in that: The water storage tank is provided with a pipeline body for adding treatment agent, and a control valve is arranged on the pipeline body.

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