Sponge city rainwater collection, purification and recycling system and method

Abstract

The application relates to a sponge city rainwater collection, purification and recycling system and method, and relates to the technical field of sponge city construction. The system comprises a mounting frame fixed at a road surface drain outlet, a drain cover plate arranged in the mounting frame, a rainwater purification assembly arranged below the drain cover plate, a plurality of purification units arranged side by side to form the rainwater purification assembly, and a conveying assembly arranged in the mounting frame and used for overturning the purification units to the upper side of the drain cover plate for maintenance. The system is provided with rotatable filter screen plates, catalyst modules, purifying agent modules and activated carbon modules, various purification measures are cooperatively used, rainwater can be efficiently purified, the deflection structure not only provides power for the extrusion mechanism, but also increases the complexity of the water flow path, improves the purification efficiency, prevents the deposition of pollutants through vibration, and prolongs the service life of the assembly.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sponge city construction, and particularly relates to a sponge city rainwater collection, purification and recycling system and method. BACKGROUND

[0002] In recent years, in response to urban water resource shortage and waterlogging problems, the concept of sponge city construction has emerged. The sponge city emphasizes strengthening urban planning, construction and management, fully utilizing the ecological system of buildings, roads, green spaces and water systems to absorb, store and release rainwater, effectively controlling rainwater runoff, and realizing the urban development mode of natural storage, natural penetration and natural purification.

[0003] In the traditional rainwater treatment method, rainwater is usually directly discharged into the water body around the city through the drainage pipe network. This method not only fails to effectively utilize the valuable rainwater resources, but also may pollute the receiving water body due to the large amount of pollutants carried by the initial rainwater, such as road dust, oil stains and garbage.

[0004] The purification assembly of the existing sponge city rainwater collection, purification and recycling system is usually fixedly installed, and it is difficult to conveniently maintain and maintain. In the long-term use process, the purification assembly may be degraded due to the problems of trapping a large amount of impurities, breeding of microorganisms and the like, but due to the unreasonable structure design, the operation of cleaning and replacing the purification assembly is cumbersome. The purification process of the existing system is not perfect, generally adopting a single filtering or sedimentation method, which is difficult to effectively remove small particulate matters, dissolved pollutants and organic substances in water, so that the water quality after purification is difficult to meet the diversified water demand. In addition, the safety of the existing system is insufficient, and in heavy rain weather conditions, the traditional rainwater discharge facility usually cannot provide sufficient warning signs, pedestrians or vehicles may inadvertently enter the drainage port area due to poor visibility, causing safety hazards.

[0005] Therefore, we provide a sponge city rainwater collection, purification and recycling system and method to solve the above problems. SUMMARY

[0006] The purpose of the present application is to provide a sponge city rainwater collection, purification and recycling system and method to solve the problems in the background art.

[0007] The present application achieves the above-mentioned purpose through the following technical solutions:

[0008] The utility model provides a sponge city rainwater collection purification recycling system, including the installation frame of fixed establishment in the road surface drainage, the drainage apron is equipped with in the installation frame, the lower side of drainage apron is equipped with rainwater purification subassembly, rainwater purification subassembly is by a plurality of parallel arrangement's purification unit constitutes, the conveying assembly for turning over purification unit to the upper side of drainage apron to carry out maintenance is further equipped with in the installation frame, the conveying assembly includes transmission belt, the drive part for driving transmission belt rotation and the track of fixed in the inner wall of installation frame and with transmission belt is matched, the movable door for the passage of purification unit is equipped with in the installation frame at the both ends of drainage apron.

[0009] As a further optimization scheme of the utility model, the purification unit includes two symmetrical vertical plates, a filter screen plate, a catalyst module, a purification agent module and an activated carbon module are sequentially arranged from top to bottom between the two vertical plates, side frames are arranged on both sides of the two vertical plates, and piezoelectric films and ultraviolet lamps are integrated in the side frames; a plurality of extrusion mechanisms are arranged on both sides of the bottom of the filter screen plate, the catalyst module, the purification agent module and the activated carbon module, and the extrusion mechanisms are used to apply pressure to the piezoelectric films to generate a piezoelectric effect to purify rainwater based on the rotation of the filter screen plate, the catalyst module, the purification agent module and the activated carbon module.

[0010] As a further optimization scheme of the utility model, rubber pads are fixedly arranged on the outer sides of the side frames, and the rubber pads are used to abut against each other between adjacent two purification units.

[0011] As a further optimization scheme of the utility model, shafts are arranged in the middle portions of the filter screen plate, the catalyst module, the purification agent module and the activated carbon module and are rotationally connected with the vertical plates; flexible sealing members are arranged between the filter screen plate, the catalyst module, the purification agent module, the activated carbon module and the inner walls of the side frames.

[0012] As a further optimization scheme of the utility model, the extrusion mechanisms include fixed plates fixedly arranged in the side frames and connecting rods rotationally arranged at the bottoms of the filter screen plate, the catalyst module, the purification agent module or the activated carbon module; extrusion rods are movably arranged through the fixed plates, one end of the extrusion rod is provided with a ball head structure abutting against the piezoelectric film, the other end is rotationally connected with the end portion of the connecting rod, and a first spring for resetting is arranged on the extrusion rod.

[0013] As a further optimization scheme of the present application, the outer side of one of the vertical plates is provided with a driving mechanism for driving the filter screen plate, the catalyst module, the purifying agent module and the activated carbon module to reciprocate and deflect; the driving mechanism comprises a driving frame slidingly arranged on the vertical plate, a plurality of racks are staggered arranged on the inner wall of the driving frame, gear wheels engaged with the racks are fixedly arranged at the ends of the rotating shafts of the filter screen plate, the catalyst module, the purifying agent module and the activated carbon module; a cam is arranged above the driving frame, and a motor is arranged for driving the cam to rotate, an activity rod is fixedly arranged at the bottom of the driving frame, a fixed seat is fixedly arranged on the vertical plate for the activity rod to penetrate through, and a second spring is arranged on the activity rod for resetting.

[0014] As a further optimization scheme of the present application, the mounting frame is further provided with a lifting assembly for lifting to mark the range of the drainage cover plate; the lifting assembly comprises two inclined strut units symmetrically arranged on both sides of the drainage cover plate, a lifting frame and a lifting mechanism for driving the lifting frame to lift, the inclined strut unit comprises an inclined strut plate and a telescopic rod arranged in the inclined strut plate, one end of the inclined strut plate is rotatably connected with the mounting frame, the other end is rotatably connected with the end face of the upper end beam of the lifting frame through the telescopic rod, a folding frame is arranged in the inner side groove of the inclined strut plate, and the folding frames of the two inclined strut units are buckled with each other.

[0015] As a further optimization scheme of the present application, a water storage tank for storing purified rainwater is fixedly arranged at the bottom corner of the mounting frame; an adjusting plate and a connecting seat are arranged on one side of the upper end beam of the lifting frame, the connecting seat is rotatably connected with the beam, and the adjusting plate is rotatably connected with the connecting seat; a water spraying unit for reusing rainwater is integrated on the adjusting plate, the water spraying unit comprises a water spraying pipe and a water pump, a plurality of spray holes are arranged at equal intervals on the water spraying pipe, and the water pump is used for pumping rainwater in the water storage tank into the water spraying pipe.

[0016] The present application also provides a sponge city rainwater collection, purification and reuse method, comprising the following steps:

[0017] S1, the rainwater enters the rainwater purification assembly through the drainage cover plate, and the rainwater is gradually purified by the rainwater purification assembly to remove various pollutants in the rainwater;

[0018] When the rainwater purification assembly needs to be cleaned and maintained, the driving part of the conveying assembly is started, the driving part drives the transmission belt to run on the track, the rainwater purification assembly connected with the transmission belt gradually moves above the drainage cover plate along with the running of the transmission belt, and the rainwater purification assembly passes through the movable doors at both ends of the drainage cover plate during the moving process, and is completely turned over above the drainage cover plate for cleaning and maintenance;

[0019] S2, the purified rainwater is conveyed to the water storage facilities of the city through the pipeline to provide water source for subsequent reuse.

[0020] The application has the beneficial effects that:

[0021] 1、The rainwater purification assembly is conveyed to the upper side of the drainage cover plate for sunning, odor removal, maintenance or replacement operation, which improves the maintenance efficiency, prolongs the service life of the rainwater purification assembly, and cooperatively processes the rainwater through multiple purification measures, the deflection structure not only provides power for the extrusion mechanism, but also increases the complexity of the water flow path, improves the purification efficiency, prevents the deposition of pollutants through vibration, and prolongs the service life of the assembly.

[0022] 2、The piezoelectric film, ultraviolet lamp and extrusion mechanism are arranged to assist in purifying the rainwater through the piezoelectric effect, decompose part of organic pollutants, further improve the rainwater purification effect, the catalyst module under the irradiation of the ultraviolet lamp can accelerate the chemical reaction, effectively degrade the harmful substances in the water, and enhance the overall purification capacity.

[0023] 3、The lifting assembly is arranged to mark the range of the drainage cover plate in heavy rain weather, protect the safety of pedestrians and vehicles, and realize the reuse of the purified rainwater in combination with the water spraying unit, improve the water resource utilization rate, and the whole system structure is compact, convenient to operate, and has good practicality and maintainability. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole structure of the application;

[0025] Figure 2 It is a local structure of the application;

[0026] Figure 3 It is a purification unit appearance structure diagram of the application;

[0027] Figure 4 It is a purification unit internal structure diagram of the application;

[0028] Figure 5 It is an extrusion mechanism structure diagram of the application;

[0029] Figure 6 It is a side frame structure diagram of the application;

[0030] Figure 7 It is a driving mechanism structure diagram of the application;

[0031] Figure 8 It is a lifting assembly assembly diagram of the application;

[0032] Figure 9 It is a lifting assembly structure diagram of the application;

[0033] Figure 10 For the purposes of the present invention Figure 9 A structure amplification diagram is shown in the figure.

[0034] In the figure:

[0035] 1, installation frame; 101, movable door; 2, conveying assembly; 3, drainage cover plate; 4, purification unit; 401, vertical plate; 402, filter screen plate; 403, catalyst module; 404, purification agent module; 405, activated carbon module; 406, side frame body; 407, piezoelectric film; 408, ultraviolet lamp; 409, extrusion mechanism; 409a, fixed plate; 409b, extrusion rod; 409c, connecting rod; 409d, first spring; 410, rubber pad; 411, flexible seal; 412, driving mechanism; 412a, driving frame; 412b, rack; 412c, gear; 412d, cam; 412e, motor; 412f, movable rod; 412g, fixed seat; 412h, second spring; 5, water storage tank; 6, lifting assembly; 601, diagonal brace unit; 601a, diagonal brace plate; 601b, telescopic rod; 601c, folding frame; 602, lifting frame; 602a, adjusting plate; 602b, connecting seat; 603, lifting mechanism; 604, water spraying unit; 604a, water spraying pipe; 604b, spray hole; 604c, water pump. DETAILED DESCRIPTION

[0036] The following will be further described in detail in combination with the drawings. It is necessary to point out here that the following detailed description is only used to further illustrate the application and cannot be understood as limiting the protection scope of the application. Those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0037] Example one

[0038] In order to solve the problem that the existing purification assembly of the rainwater system is usually fixedly installed, it is difficult to maintain and maintain conveniently, the purification process is not perfect, it is difficult to effectively remove various pollutants in rainwater, and the water quality after purification is difficult to meet the diversified water demand, please refer to Figures 1-4 、 Figure 6The application provides a sponge city rainwater collection, purification and recycling system, which comprises a mounting frame 1 fixed at a road surface drain outlet, a drain cover plate 3 arranged in the mounting frame 1, and the top surface of the drain cover plate 3 is flush with the top surface of the mounting frame 1, a rainwater purification assembly arranged below the drain cover plate 3, the rainwater purification assembly is composed of a plurality of purification units 4 arranged side by side, a conveying assembly 2 arranged in the mounting frame 1 and used for overturning the purification unit 4 to the upper side of the drain cover plate 3 for maintenance, the conveying assembly 2 comprises a transmission belt, a driving member used for driving the transmission belt to rotate, and a track fixed to the inner wall of the mounting frame 1 and matched with the transmission belt, and movable doors 101 arranged in the mounting frame 1 at both ends of the drain cover plate 3 and used for allowing the purification unit 4 to pass through. The movable door 101 allows the purification unit 4 to pass through smoothly, so that the purification unit 4 is moved from below to above the drain cover plate 3 by the conveying assembly 2 for maintenance or replacement operation, the movable door 101 has good sealing performance, can ensure that rainwater does not leak in a non-operation state, and can be quickly opened and closed to adapt to different operation requirements, and can be completely opened when the rainfall is large to increase the flow. When the weather is fine, the rainwater purification assembly can be moved above the ground to be exposed to the sun, thereby effectively removing odor and restoring the purification capacity, and meanwhile, the rainwater purification assembly facilitates daily inspection and necessary maintenance work of workers and ensures long-term stable operation of the system.

[0039] The purification unit 4 comprises two vertically arranged vertical plates 401 fixed on the conveying belt of the conveying assembly 2, a filter screen plate 402, a catalyst module 403, a purifying agent module 404 and an activated carbon module 405 are sequentially arranged from top to bottom between the two vertical plates 401, side frame bodies 406 are arranged on the two sides of the two vertical plates 401, piezoelectric films 407 and ultraviolet lamps 408 are integrated in the side frame bodies 406, a plurality of extrusion mechanisms 409 are arranged on the bottom sides of the filter screen plate 402, the catalyst module 403, the purifying agent module 404 and the activated carbon module 405, and the extrusion mechanisms 409 are used for applying pressure to the piezoelectric films 407 based on the rotation of the filter screen plate 402, the catalyst module 403, the purifying agent module 404 and the activated carbon module 405 to generate a piezoelectric effect to purify rainwater.

[0040] Rubber pads 410 are fixed to the outer sides of the side frame bodies 406, and the adjacent two purification units 4 abut each other through the rubber pads 410. The rubber pads 410 not only have a buffering effect and reduce abrasion of the purification units 4 caused by vibration or water flow impact during operation, but also effectively seal the gap between the adjacent purification units 4, prevent untreated rainwater from bypassing the purification assembly, and ensure the integrity and efficiency of the rainwater purification process.

[0041] The middle part of the filter screen plate 402, the catalyst module 403, the purifying agent module 404 and the activated carbon module 405 is provided with a rotating shaft connected with the vertical plate 401; the filter screen plate 402, the catalyst module 403, the purifying agent module 404 and the activated carbon module 405 are provided with flexible sealing members 411 between the inner wall of the side frame body 406, the flexible sealing members 411 are used to keep dynamic sealing between the modules and the side frame body 406 during rotation, preventing untreated rainwater from leaking through the gap.

[0042] As shown in Figure 5 The pressing mechanism 409 includes a fixed plate 409a fixed in the side frame body 406 and a connecting rod 409c rotatably arranged at the bottom of the filter screen plate 402, the catalyst module 403, the purifying agent module 404 or the activated carbon module 405; a pressing rod 409b is movably arranged on the fixed plate 409a, one end of the pressing rod 409b is provided with a ball head structure abutting against the piezoelectric film 407, the other end is rotatably connected with the end of the connecting rod 409c, a first spring 409d for resetting is arranged on the pressing rod 409b, so as to ensure that the pressing rod 409b can automatically return to the initial position under no load.

[0043] When not subjected to external pressure, the pressing rod 409b is kept in an initial position by the first spring 409d, the ball head structure of the pressing rod 409b lightly touches the piezoelectric film 407, but does not apply significant pressure, when the filter screen plate 402, the catalyst module 403, the purifying agent module 404 or the activated carbon module 405 rotates around the rotating shaft in the middle, the connecting rod 409c moves accordingly, pushing the pressing rod 409b to move along the guide hole on the fixed plate 409a, gradually applying pressure to the piezoelectric film 407, the ball head structure of the pressing rod 409b helps to uniformly distribute the applied pressure, and effectively triggers the piezoelectric effect, when the pressing rod 409b presses the piezoelectric film 407, due to mechanical deformation, the piezoelectric material generates charge separation, and then generates electric energy, decomposes part of organic pollutants, significantly improves the purification effect, the rotation is completed or the external force disappears, the resetting force provided by the first spring 409d will make the pressing rod 409b return to the initial position, preparing for the next operation cycle.

[0044] As shown in Figure 7As shown, the outer side of one of the vertical plates 401 is provided with a driving mechanism 412 for driving the filter screen plate 402, the catalyst module 403, the purifying agent module 404 and the activated carbon module 405 to reciprocally deflect; the driving mechanism 412 comprises a driving frame 412a slidingly arranged on the vertical plate 401, a plurality of racks 412b are staggered arranged on the inner wall of the driving frame 412a, the shaft end of the filter screen plate 402, the catalyst module 403, the purifying agent module 404 and the activated carbon module 405 are all fixedly provided with a gear 412c engaged with the racks 412b; a cam 412d and a motor 412e for driving the cam 412d to rotate are arranged above the driving frame 412a, an activity rod 412f is fixedly arranged at the bottom of the driving frame 412a, a fixed seat 412g for the activity rod 412f to penetrate through is fixedly arranged on the vertical plate 401, and a second spring 412h for resetting is sleeved on the activity rod 412f.

[0045] When it is needed to drive the filter screen plate 402, the catalyst module 403, the purifying agent module 404 and the activated carbon module 405 to reciprocally deflect, the motor 412e is started to drive the cam 412d to rotate, with the rotation of the cam 412d, the driving frame 412a is gradually pushed to slide up and down along the vertical plate 401, the up and down movement of the driving frame 412a makes the staggered arranged racks 412b in the driving frame 412a and the gears 412c on the modules to be engaged in turn, since the racks 412b are staggered arranged, when the driving frame 412a moves up or down, different racks 412b will push the corresponding gears 412c to make the corresponding modules produce reciprocating deflection movement, the continuous rotation of the cam 412d causes the driving frame 412a to slide up and down constantly, so that the filter screen plate 402, the catalyst module 403, the purifying agent module 404 and the activated carbon module 405 deflect reciprocally according to the predetermined direction and angle; such deflection not only provides power for the extrusion mechanism 409, but also increases the complexity of the water flow path, improves the purification efficiency, and can prevent the deposition of pollutants through vibration to prolong the service life of the components.

[0046] Example Two

[0047] On the basis of example one, in order to improve the safety of the system and facilitate the reuse of rainwater, such as Figures 8-10As shown, the mounting frame 1 is also provided with a lifting assembly 6 for lifting to mark the range of the drainage cover plate 3; the lifting assembly 6 includes two inclined strut units 601 symmetrically distributed on both sides of the drainage cover plate 3, a lifting frame 602, and a lifting mechanism 603 for driving the lifting frame 602 to lift, the inclined strut unit 601 includes an inclined strut plate 601a and a telescopic rod 601b located in the inclined strut plate 601a, one end of the inclined strut plate 601a is rotationally connected with the mounting frame 1, the other end is rotationally connected with the upper end beam end face of the lifting frame 602 through the telescopic rod 601b, a folding frame 601c is arranged in the inner groove of the inclined strut plate 601a, the folding frames 601c of the two inclined strut units 601 are buckled with each other to form a stable support structure.

[0048] A water storage tank 5 for storing purified rainwater is fixedly arranged at the bottom corner of the mounting frame 1; one side of the upper end beam of the lifting frame 602 is provided with an adjusting plate 602a and a connecting seat 602b, the connecting seat 602b is rotationally connected with the beam, and the adjusting plate 602a is rotationally connected with the connecting seat 602b, so that the adjusting plate 602a can be flexibly adjusted in angle and orientation; the adjusting plate 602a is integrated with a water spraying unit 604 for reusing rainwater, the water spraying unit 604 includes a water spraying pipe 604a and a water pump 604c, a plurality of evenly spaced spray holes 604b are arranged on the water spraying pipe 604a, and the water pump 604c is used to pump rainwater in the water storage tank 5 into the water spraying pipe 604a to realize the reuse of rainwater.

[0049] When there is no operation, the lifting frame 602 is in the lowest position, the inclined strut unit 601 is horizontally located at the side of the drainage cover plate 3, and the folding frame 601c is completely folded into the inner groove of the inclined strut plate 601a, so that the overall structure is compact and does not occupy additional space; when it rains heavily, the lifting mechanism 603 is started to push the lifting frame 602 to move upward, with the lifting of the lifting frame 602, the telescopic rod 601b of the inclined strut unit 601 gradually expands, and the folding frames 601c of the two inclined strut units 601 gradually open and buckle with each other to form a stable triangular support structure, thereby significantly marking the range of the drainage cover plate 3 and playing a warning role to avoid pedestrians or vehicles from being mistaken; when it is necessary to reuse the purified rainwater, the water pump 604c is started to pump the rainwater in the water storage tank 5 into the water spraying pipe 604a, the plurality of spray holes 604b on the water spraying pipe 604a are evenly distributed, can spray rainwater at a certain pressure and angle, cover a larger range, and the adjusting plate 602a can be flexibly adjusted in angle through the connecting seat 602b, so that the water spraying direction can be finely adjusted according to actual needs, for example, for irrigating surrounding green belts, cleaning roads, or other purposes.

[0050] Embodiment three

[0051] On the basis of the embodiments one and two, the application further provides a sponge city rainwater collection, purification and reuse method, which comprises the following steps:

[0052] S1, rainwater enters the rainwater purification assembly through the drainage cover plate 3, and the rainwater is purified step by step by the rainwater purification assembly to remove various pollutants in the rainwater, specifically, large particle suspended solids are removed through the filter screen plate 402, organic pollutants in the rainwater are further decomposed and converted through the cooperation of the catalyst module 403 and the ultraviolet lamp 408, harmful substances in the rainwater are neutralized and adsorbed through the purifying agent module 404, and finally the odor and residual chemical pollutants are adsorbed through the activated carbon module 405;

[0053] Wherein, in the process of rainwater flowing through each layer of purification module, the filter screen plate 402, the catalyst module 403, the purifying agent module 404 and the activated carbon module 405 are driven to rotate, and the piezoelectric film 407 is subjected to pressure to generate piezoelectric effect to assist in purifying the rainwater;

[0054] Wherein, when the rainwater purification assembly needs to be cleaned and maintained, the driving member of the conveying assembly 2 is started, the driving member drives the transmission belt to run on the track, and the rainwater purification assembly connected with the transmission belt gradually moves above the drainage cover plate 3 along with the running of the transmission belt, the rainwater purification assembly passes through the movable door 101 at both ends of the drainage cover plate 3 during the moving process, and is completely turned over above the drainage cover plate 3 to be cleaned and maintained;

[0055] S2, part of the purified rainwater is transported to the city's water storage facility through the pipeline to provide water source for subsequent reuse, and the other part is stored in the water storage tank 5 to irrigate the surrounding green belt, clean the road surface, flush the rainwater purification assembly or other purposes.

[0056] The above-described embodiments only express one embodiment of the present application, which is described in detail and specifically, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A sponge city rainwater collection, purification and recycling system, comprising a mounting frame (1) fixed at a road surface drain, characterized in that: The installation frame (1) is internally provided with a drainage cover plate (3), the lower portion of the drainage cover plate (3) is provided with a rainwater purification assembly, the rainwater purification assembly is composed of a plurality of purification units (4) arranged side by side, the installation frame (1) is further provided with a conveying assembly (2) for overturning the purification unit (4) to the upper portion of the drainage cover plate (3) for maintenance, the conveying assembly (2) comprises a transmission belt, a driving member for driving the transmission belt to rotate, and a track fixed on the inner wall of the installation frame (1) and matched with the transmission belt; The installation frame (1) at both ends of the drainage cover plate (3) is internally provided with a movable door (101) for the purification unit (4) to pass through; The purification unit (4) comprises two vertically arranged vertical plates (401), a filter screen plate (402), a catalyst module (403), a purifying agent module (404) and an activated carbon module (405) are sequentially arranged from top to bottom between the two vertical plates (401), side frame bodies (406) are arranged on both sides of the two vertical plates (401), piezoelectric films (407) and ultraviolet lamps (408) are integrated in the side frame bodies (406), a plurality of extrusion mechanisms (409) are arranged on both sides of the bottom of the filter screen plate (402), the catalyst module (403), the purifying agent module (404) and the activated carbon module (405), the extrusion mechanisms (409) are used for applying pressure to the piezoelectric films (407) based on the rotation of the filter screen plate (402), the catalyst module (403), the purifying agent module (404) and the activated carbon module (405) to generate a piezoelectric effect to purify rainwater; Rubber pads (410) are fixedly arranged on the outer sides of the side frame bodies (406), and adjacent two purification units (4) abut against each other through the rubber pads (410); Flexible sealing members (411) are arranged between the filter screen plate (402), the catalyst module (403), the purifying agent module (404) and the activated carbon module (405) and the inner walls of the side frame bodies (406); The extrusion mechanism (409) comprises a fixed plate (409a) fixed in the side frame body (406) and a connecting rod (409c) rotatably arranged at the bottom of the filter screen plate (402), the catalyst module (403), the purifying agent module (404) or the activated carbon module (405), an extrusion rod (409b) is movably arranged on the fixed plate (409a), one end of the extrusion rod (409b) is provided with a ball head structure abutting against the piezoelectric film (407), the other end is rotatably connected with the end portion of the connecting rod (409c), and a first spring (409d) for resetting is sleeved on the extrusion rod (409b); One of the vertical plates (401) is provided with a driving mechanism (412) for driving the filter screen plate (402), the catalyst module (403), the purifying agent module (404) and the activated carbon module (405) to reciprocally deflect; The driving mechanism (412) comprises a driving frame (412a) slidingly arranged on the vertical plate (401), and a plurality of racks (412b) are arranged on the inner wall of the driving frame (412a) in a staggered manner, and the rotating shaft end of the filter screen plate (402), the catalyst module (403), the purifying agent module (404) and the activated carbon module (405) is fixedly provided with a gear (412c) engaged with the rack (412b); A cam (412d) and a motor (412e) for driving the cam (412d) to rotate are arranged above the driving frame (412a), and an active rod (412f) is fixedly arranged at the bottom of the driving frame (412a), a fixed seat (412g) for the active rod (412f) to penetrate is fixedly arranged on the vertical plate (401), and a second spring (412h) for resetting is sleeved on the active rod (412f). 2.The sponge city rainwater collection, purification and recycling system according to claim 1, characterized in that: The mounting frame (1) is further provided with a lifting assembly (6) for lifting to mark the range of the drainage cover plate (3); The lifting assembly (6) comprises two inclined strut units (601) symmetrically arranged on both sides of the drainage cover plate (3), a lifting frame (602) and a lifting mechanism (603) for driving the lifting frame (602) to lift, the inclined strut unit (601) comprises an inclined strut plate (601a) and a telescopic rod (601b) in the inclined strut plate (601a), one end of the inclined strut plate (601a) is rotatably connected with the mounting frame (1), the other end is rotatably connected with the upper end beam end surface of the lifting frame (602) through the telescopic rod (601b), and a folding frame (601c) is arranged in the inner side groove of the inclined strut plate (601a), and the folding frames (601c) of the two inclined strut units (601) are buckled with each other. 3.The sponge city rainwater collection, purification and recycling system according to claim 2, characterized in that: A water storage tank (5) for storing purified rainwater is fixedly arranged at the bottom corner of the mounting frame (1); One side of the upper end beam of the lifting frame (602) is provided with an adjusting plate (602a) and a connecting seat (602b), the connecting seat (602b) is rotatably connected with the beam, and the adjusting plate (602a) is rotatably connected with the connecting seat (602b); The adjusting plate (602a) is integrated with a water spraying unit (604) for recycling rainwater, the water spraying unit (604) comprises a water spraying pipe (604a) and a water pump (604c), a plurality of equally spaced spray holes (604b) are arranged on the water spraying pipe (604a), and the water pump (604c) is used for pumping rainwater in the water storage tank (5) into the water spraying pipe (604a).

4. A sponge city rainwater collection, purification and recycling method, using a sponge city rainwater collection, purification and recycling system according to any one of claims 1-3, characterized in that, The method comprises the following steps: S1, rainwater enters the purification unit (4) through the drainage cover plate (3), and the rainwater is gradually purified by the purification unit (4) to remove various pollutants in the rainwater; When the purification unit (4) needs cleaning and maintenance, the driving part of the conveying assembly (2) is started, the driving part drives the transmission belt to run on the track, the purification unit (4) connected with the transmission belt gradually moves above the drainage cover plate (3) along with the running of the transmission belt, the purification unit (4) passes through the movable door (101) at both ends of the drainage cover plate (3) during the moving process, and is completely turned over above the drainage cover plate (3) to perform cleaning and maintenance; S2, the purified rainwater is transported to the water storage facility of the city through the pipeline, and water source is provided for subsequent reuse.

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