Rainwater collection, regulation and storage system for simulating traditional paving square

Abstract

The invention belongs to the technical field of rainwater collection, regulation and storage, particularly relates to a rainwater collection, regulation and storage system for simulating a traditional pavement plaza, and provides the following scheme aiming at the problems that the traditional pavement plaza is high in hardening rate, large in rainwater runoff, prone to causing urban waterlogging, serious in rainwater resource loss and difficult to effectively reuse. Comprising an earth surface paving unit, a base layer permeation unit and a regional regulation and storage unit. Through the layered slope-shaped broken stone hardcore and the floating ball sealing module, a hierarchical linkage mechanism of light rain permeation, moderate rain storage and heavy rain regulation and storage is achieved, the functions can be dynamically switched according to rainfall, runoff control and the rainwater utilization rate are greatly improved, a double-floating-ball and gear-rack pure mechanical structure is adopted, no electric drive exists in the whole process, the fault risk of an electric control element is avoided, and the service life of the device is prolonged. The structure is simple, the operation and maintenance cost is reduced, infiltration, confluence and regulation and storage functions are integrated, the structure is compact, the cohesion is high, the bearing and anti-blocking performance is considered, various municipal and community scenes are adapted, and the sponge city construction requirements are perfectly met.

Description

TECHNICAL FIELD

[0001] The present application relates to a rainwater collection and storage system, in particular to a rainwater collection and storage system simulating a traditional paved square, belonging to the technical field of rainwater collection and storage. BACKGROUND

[0002] With the continuous promotion of sponge city construction, the research and development and application of urban rainwater collection and storage systems have been increasingly valued. Rainwater, as a clean renewable water resource, its efficient collection and rational use, not only can alleviate the urban water supply pressure, but also can effectively reduce the urban rainwater runoff, reduce the risk of urban waterlogging, and reduce the damage of non-point source pollution to the water environment.

[0003] Traditional rainwater collection devices are mostly designed with a single structure, commonly known as simple permeable type and direct storage type. The simple permeable type device usually takes gravel cushion as the core and relies on natural permeation to realize rainwater recharge, but this type of device lacks directional flow structure, and rainwater diffuses disorderly in the cushion, with low permeation efficiency. Small rainwater is easy to flow away, and in heavy rain, it is difficult to quickly collect excess rainwater, resulting in poor runoff control effect. The direct storage type device stores rainwater in a water storage tank and then uses power equipment such as water pump to realize discharge and reuse. Although it improves the rainwater collection capacity, it needs to lay power supply lines, and the operation and maintenance cost is high in the later period. In addition, in extreme weather such as heavy rain, once a power failure occurs, it is easy to cause overflow of the water storage tank and cause secondary water accumulation.

[0004] In summary, the rainwater collection and storage devices on the current market generally have the technical problems of being unable to dynamically realize the precise switching of rainwater permeation, collection, storage and discharge according to the size of rainfall, poor flexibility, high dependence on power equipment, insufficient operation stability and adaptability, and other technical problems, which are difficult to meet the multifunctional demand of rainwater in the construction of sponge city. SUMMARY

[0005] The present application provides a rainwater collection and storage system simulating a traditional paved square to solve at least one of the above technical problems.

[0006] The present application realizes the above-mentioned purpose through the following technical scheme: a rainwater collection and storage system simulating a traditional paved square, comprising a ground surface paving unit, a base layer permeation unit and a regional storage unit, the ground surface paving unit comprises a plurality of water permeable bricks arranged in a flat manner, the gaps between adjacent water permeable bricks are filled with water permeable sealant, the inside of the water permeable brick is provided with a main water storage cavity, the side of the water permeable brick is provided with a water permeation groove, and a floating ball sealing module is arranged between each water permeation groove and the main water storage cavity at equal intervals, the floating ball sealing module is used to control the opening and closing of the water inlet of the main water storage cavity according to the water level in the water permeation groove. The base layer permeation unit comprises a distributed water storage tank embedded cm below the water permeable brick body and a base layer collector pipe network in communication with the distributed water storage tank, a gravel cushion layer is laid between the distributed water storage tank and the water permeable brick body, and the base layer collector pipe network is embedded in the gravel cushion layer; The regional regulation and storage unit comprises a regional regulation and storage pool made of reinforced concrete, the regional regulation and storage pool is arranged at the side of the paving area, a rectangular communication pipe is fixedly connected between the overflow port of the distributed water storage tank and the regional regulation and storage pool, a direct discharge port and a filter port are arranged on the side of the regional regulation and storage pool close to the municipal pipe network, and the direct discharge port is located above the filter port.

[0007] As a further scheme of the present application: the floating ball sealing module comprises a support block, a T-shaped sliding rod, a first floating ball, a pulley, a wheel frame, a water inlet pipe, an axial sliding support block, an axial sliding rod, a conical sealing plug, a return spring and a pull rope; at least three support blocks are fixed at equal intervals on the inner side wall of the water permeation groove, the T-shaped sliding rod is in sliding fit with the support blocks, the first floating ball is fixedly connected to the top end of the T-shaped sliding rod, a water inlet pipe is fixedly connected in the water inlet between the water permeation groove and the main water storage cavity, the water inlet pipe is correspondingly provided with the first floating ball, one end of the water inlet pipe close to the main water storage cavity is fixedly connected with the axial sliding support block through a support shaft, the axial sliding rod is slidably arranged at the center position of the axial sliding support block, the conical sealing plug is fixedly connected to one end of the axial sliding rod, the return spring is sleeved outside the axial sliding rod, and the two ends of the return spring are connected with the conical sealing plug and the axial sliding support block respectively, and the two ends of the pull rope are fixedly connected with the conical sealing plug and the first floating ball respectively.

[0008] As a further scheme of the present application: the side surface of the support block is fixedly connected with the wheel frame, the pulley is rotatably connected in the wheel frame through a rotating shaft, and the pull rope is wound on the pulley.

[0009] As a further scheme of the present application: a stepped flow guide block is fixedly connected in the water permeation groove, a water permeation port is arranged at the bottom of the stepped flow guide block, the water permeation port penetrates through the bottom of the water permeable brick body, a brick body water permeation pipe is fixedly connected to the bottom surface of the water permeable brick body, the water permeation port and the brick body water permeation pipe are in one-to-one correspondence, and a detachable stainless steel filter screen is arranged in the groove opening of the water permeation groove.

[0010] As a further scheme of the present application: the base layer manifold pipe network comprises a brick flow guide pipe, a one-way flow guide valve, a main water guide pipe, a main drain pipe, a branch drain pipe, a branch manifold pipe and a main manifold pipe, the brick flow guide pipe is fixedly connected at the center position of the bottom surface of the water permeable brick, and the brick flow guide pipe and the main water storage cavity are communicated, the one-way flow guide valve is fixedly connected inside the brick flow guide pipe, the main water guide pipe is embedded inside the gravel cushion layer, a plurality of main drain pipes are fixedly connected at the bottom surface of the main water guide pipe, and the bottom ends of the plurality of main drain pipes extend to the inner top of the distributed water storage tank, a plurality of water permeable bricks are arranged in rows, the brick flow guide pipes at the bottom surfaces of the water permeable bricks in the same row are all connected with the branch manifold pipes, the branch drain pipes are fixedly connected between each branch manifold pipe and the main water guide pipe, and a plurality of main manifold pipes are fixedly connected on both sides of the main water guide pipe, and the pipe body surface of each main manifold pipe is provided with a first water permeable hole.

[0011] As a further scheme of the present application: the side surface and the bottom surface of the distributed water storage tank are provided with a plurality of second water permeable holes, and the distributed water storage tank is paved with water permeable geotextile between the excavated foundation.

[0012] As a further scheme of the present application: the gravel cushion layer is divided into upper and lower layers, the lower layer is a bearing leveling layer, and gravel with a particle size of 20-30 mm is used, the upper layer is a manifold guide layer, and gravel with a particle size of 10-15 mm is used, and the manifold guide layer is paved in a slope structure with a low center and high periphery, forming a 1%-2% manifold slope, a medium sand leveling layer is paved on the top of the gravel cushion layer, and the water permeable bricks are laid flat on the medium sand leveling layer.

[0013] As a further scheme of the present application: a plurality of main manifold pipes are embedded inside the gravel cushion layer, and the embedding slope of the main manifold pipe is consistent with the 1%-2% manifold slope of the manifold guide layer, for permeating and collecting rainwater in the gravel cushion layer.

[0014] As a further scheme of the present application: the upper position of the inner wall of the regional regulation reservoir corresponding to the direct discharge port is fixedly connected with a first positioning block in a symmetrical manner, a first rotating rod is rotatably connected between the two first positioning blocks, a first cover plate is fixedly sleeved on the surface of the rod body of the first rotating rod, the size of the first cover plate is matched with the direct discharge port, the upper position of the inner wall of the regional regulation reservoir corresponding to the filter port is fixedly connected with a second positioning block in a symmetrical manner, a second rotating rod is rotatably connected between the two second positioning blocks, a second cover plate is fixedly sleeved on the surface of the rod body of the second rotating rod, the size of the second cover plate is matched with the filter port, one end of the first rotating rod penetrates through one of the first positioning blocks and is fixedly connected with an A gear, one end of the second rotating rod penetrates through one of the second positioning blocks and is fixedly connected with a B gear, two guide sliding rods are fixedly connected inside the regional regulation reservoir, a guide seat is slidably sleeved on the surface of the two guide sliding rods, a reverse Z-shaped rack is fixedly connected to one side of the guide seat, the A gear meshes with the right side of the reverse Z-shaped rack, the B gear meshes with the left side of the reverse Z-shaped rack, and a second floating ball is fixedly connected to the side of the guide seat away from the Z-shaped rack.

[0015] As a further scheme of the present application: the buoyancy value of the second floating ball is greater than the sum of the water resistance and the sliding friction of the guide seat when the first cover plate and the second cover plate are opened and closed, so as to drive the guide seat to slide along the guide sliding rod and drive the reverse Z-shaped rack to move.

[0016] The present application has the following advantages: 1. In light rain weather, the present application can realize in-situ infiltration and recharge of rainwater, maximizing the utilization rate of water resources; In light rain weather, rainwater falls on the surface of the water-permeable brick body, part of it directly infiltrates through the pores of the brick body itself, and the other part flows into the water infiltration groove on the side of the brick body. Due to the small amount of rain, the rainwater in the water infiltration groove can slowly infiltrate into the underlying gravel cushion through the water infiltration port at the bottom, the water-permeable pipe of the brick body, the layered and sloping structure of the gravel cushion guides the rainwater to flow to the middle, and then infiltrates into the surrounding soil through the pores of the cushion, the water infiltration holes on the side and bottom of the distributed water storage tank, and the water-permeable geotextile effectively intercepts the silt and impurities to prevent the water infiltration holes from being blocked. This process does not need to activate the water storage function of the main water storage cavity and the regional regulation reservoir, realizes the in-situ infiltration and recharge of rainwater, can not only supplement groundwater resources and improve the soil moisture content around the paved square, but also can avoid water accumulation on the surface of the square in light rain weather, ensure the comfort of pedestrian traffic, reduce the amount of impurities carried by the initial rainwater into the subsequent pipe network, and reduce the maintenance frequency of the pipe network.

[0017] 2. In moderate rain weather, the present application can realize hierarchical temporary storage and flow convergence, and accurately reduce the peak value of rainwater runoff; In moderate rain weather, the inflow speed of rainwater exceeds the permeation efficiency of the permeable brick body and the gravel cushion, and the water level in the water seepage groove gradually rises, when the water level rises to the set height, the first floating ball floats up under the action of buoyancy, through the pull rope around the pulley, overcomes the elastic force of the reset spring to pull the conical sealing plug, opens the water inlet pipe, the excess rainwater in the water seepage groove will enter the main water storage cavity for temporary storage, when the rainwater in the main water storage cavity is stored to a certain volume, the water pressure reaches the opening threshold of the one-way flow valve, the one-way flow valve is automatically opened, the rainwater flows into the branch flow collector through the brick body flow guide pipe, and then flows into the main water pipe through the branch drain pipe, and finally enters the distributed water storage tank through the main drain pipe, and the distributed water storage tank continues to seep rainwater into the soil through the water seepage hole, and the rainwater that is not infiltrated in time is temporarily stored in the tank; The process preferentially permeates rainwater, temporarily stores rainwater that does not infiltrate in time, and classifies and flows the infiltrated rainwater, which can greatly delay the time of rainwater entering the municipal pipe network, reduce the peak value of rainwater runoff, avoid rapid collection of rainwater to form surface runoff in moderate rain, and reduce the possibility of local area waterlogging from the source.

[0018] 3、The present application prevents urban waterlogging by overflow regulation and storage and hierarchical discharge in heavy rain / rainstorm weather. In heavy rain or rainstorm weather, the permeation and water storage function of the ground paving unit are all opened, but the precipitation efficiency of rainwater is much higher than the infiltration capacity of the distributed water storage tank, which causes the water level in the distributed water storage tank to continuously rise, when the water level reaches the overflow port height, the excess rainwater flows into the regional regulation water tank through the rectangular communication pipe for centralized regulation and storage, to avoid rainwater overflowing from the distributed water storage tank to the square surface, when the water level in the regional regulation water tank is low, the second floating ball is at a low position, driving the guide seat to be located at the lower end along the guide slide rod, at this time, the meshing relationship between the inverted Z-shaped rack and the two gears makes the first cover plate close the direct discharge port and the second cover plate open the filter port, rainwater enters the filter equipment for purification and then is discharged into the municipal pipe network through the filter port, to ensure the quality of rainwater reuse, when the water volume continuously increases and the water level in the regulation water tank rapidly rises, the second floating ball drives the guide seat to move upward under the action of buoyancy, the inverted Z-shaped rack moves synchronously, drives the two gears to rotate reversely, to realize that the second cover plate closes the filter port and the first cover plate opens the direct discharge port, a large amount of rainwater is rapidly discharged through the direct discharge port, to maximize the flood discharge efficiency. Through the hierarchical discharge mode, regional waterlogging caused by overflow of the regional regulation water tank can be avoided, and the discharge path can be flexibly switched according to the rain amount, to greatly reduce the instantaneous drainage pressure of the municipal pipe network, and realize efficient control of rainwater and flood.

[0019] 4. The water level response and function switching of the whole system are realized by pure mechanical structures such as floating ball, gear and rack, one-way valve and reset spring, without power driving and manual intervention, can be automatically switched according to rainfall intensity, the linkage between components is accurate and stable under different rainfall weather, and the operation will not be affected by problems such as power failure and electronic component failure, meanwhile, the stainless steel filter screen and water permeable geotextile in the system can effectively intercept impurities and reduce the risk of pipe network and water tank blockage; the one-way guide valve can prevent rainwater backflow and ensure the stability of water flow direction, the present application not only can quickly respond to sudden rainfall and adapt to changes of various rainfall weather, but also can greatly reduce the maintenance cost and failure rate in later period, and is suitable for long-term stable operation of public places such as pavement squares. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 for the whole pavement structure of the present application Figure One ; Figure 2 for the whole pavement structure of the present application Figure Two ; Figure 3 for the whole pavement structure of the present application Figure Three ; Figure 4 for the cross-sectional structure of the water permeable brick in the present application Figure One ; Figure 5 for the cross-sectional structure of the water permeable brick in the present application Figure Two ; Figure 6 for the enlarged structure diagram of A in the present application Figure Five ; Figure 7 for the cross-sectional structure of the water permeable brick in the present application Figure Three ; Figure 8 for the connection position section of the gravel cushion layer and the base layer of the present application Figure One ; Figure 9 for the connection position section of the gravel cushion layer and the base layer of the present application Figure Two ; Figure 10 for the connection position section of the gravel cushion layer and the base layer of the present application Figure Three ; Figure 11 for the internal structure of the regional water storage tank in the present application Figure One ; Figure 12 for the internal structure of the regional water storage tank in the present application Figure Two ; Figure 13This is a schematic diagram of the connection structure between the regional regulating water storage tank, the first cover plate, and the second cover plate in this invention. Figure Two ; Figure 14 This is a schematic diagram of the connection structure of the inverted Z-shaped rack, gear A, and gear B in this invention.

[0021] In the diagram: 1. Permeable brick body; 11. Infiltration trough; 12. Stainless steel filter screen; 13. Stepped guide block; 14. Infiltration outlet; 15. Brick body permeable pipe; 16. Float sealing module; 161. Support block; 162. T-shaped slide bar; 163. First float; 164. Pulley; 165. Wheel frame; 166. Inlet pipe; 167. Axial sliding support block; 168. Axial slide bar; 169. Conical sealing plug; 1610. Return spring; 1611. Pull rope; 17. Brick body guide pipe; 18. One-way guide valve; 19. Main water storage chamber; 2. Crushed stone cushion layer; 3. Distributed water storage tank; 31. Second seepage hole; 32. Main water pipe; 33. Main drainage pipe; 34. Branch drainage pipe; 35. Branch manifold; 36. Main manifold; 4. Regional regulating water storage tank; 41. Direct discharge outlet; 42. Filter outlet; 43. First positioning block; 44. First rotating rod; 45. First cover plate; 46. Gear A; 47. Second positioning block; 48. Second rotating rod; 49. Second cover plate; 410. Gear B; 411. Inverted Z-shaped rack; 412. Guide seat; 413. Guide slide rod; 414. Second float; 5. Rectangular connecting pipe. Detailed Implementation

[0022] 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.

[0023] Example 1 like Figures 1 to 14 As shown, a rainwater harvesting and storage system simulating a traditional paved plaza includes a surface paving unit, a base infiltration unit, and a regional storage unit. The surface paving unit includes several permeable bricks 1 laid flat and assembled. The gaps between adjacent permeable bricks 1 are filled with permeable sealant. A main water storage chamber 19 is opened inside the permeable brick 1, and a seepage groove 11 is opened on the side of the permeable brick 1. A float sealing module 16 is evenly spaced between each seepage groove 11 and the main water storage chamber 19. The float sealing module 16 is used to control the opening and closing of the inlet of the main water storage chamber 19 according to the water level in the seepage groove 11. The base layer permeation unit comprises a distributed water storage tank 3 buried at a position 30 cm below the water permeable brick body 1 and a base layer collector pipe network in communication with the distributed water storage tank 3, a gravel cushion layer 2 is laid between the distributed water storage tank 3 and the water permeable brick body 1, and the base layer collector pipe network is embedded in the gravel cushion layer 2; The regional regulation and storage unit comprises a regional regulation and storage pool 4 made of reinforced concrete, the regional regulation and storage pool 4 is arranged at a side of the paving area, a rectangular communication pipe 5 is fixedly connected between an overflow port of the distributed water storage tank 3 and the regional regulation and storage pool 4, a direct discharge port 41 and a filtering port 42 are arranged on a side of the regional regulation and storage pool 4 close to the municipal pipe network, and the direct discharge port 41 is located above the filtering port 42.

[0024] Further, a plurality of second water permeation holes 31 are arranged on the side and bottom of the distributed water storage tank 3, and a water permeable geotextile is arranged between the distributed water storage tank 3 and the excavated foundation.

[0025] In the use process, in the light rain stage, rainwater falls on the surface of the water permeable brick body 1, part of the rainwater directly infiltrates through the pores of the brick body, and the other part flows into the water permeation groove 11 at the side, because the rainfall is small, the rainwater in the water permeation groove 11 can flow into the gravel cushion layer 2 through the self permeation capacity, and then infiltrate into the surrounding soil through the pores of the gravel cushion layer 2, so that the rainwater is replenished in situ; In the moderate rain stage, the speed of rainwater flowing into exceeds the permeation efficiency of the water permeable brick body 1 and the gravel cushion layer 2, the water level in the water permeation groove 11 continuously rises, when the water level reaches a set threshold, the floating ball sealing module 16 triggers the action to open the water inlet of the main water storage cavity 19, the excess rainwater in the water permeation groove 11 enters the main water storage cavity 19 for temporary storage, when the rainwater storage in the main water storage cavity 19 reaches a certain volume, the water pressure drives the rainwater to enter the base layer collector pipe network, and finally the rainwater flows into the distributed water storage tank 3, and the distributed water storage tank 3 slowly infiltrates the rainwater into the soil through the self water permeation structure; In the heavy rain / storm stage, the rainwater infiltration efficiency far exceeds the infiltration capacity of the distributed water storage tank 3, the water level in the tank rapidly rises and reaches the height of the overflow port, the excess rainwater flows into the regional regulation and storage pool 4 through the rectangular communication pipe 5 for centralized regulation and storage, when the water level in the regional regulation and storage pool 4 is low, the rainwater is discharged through the filtering port 42, enters the filtering equipment for purification and then flows into the municipal pipe network, when the water level continuously rises, the system automatically switches the discharge path to open the direct discharge port 41 to rapidly discharge water, so as to relieve the pressure of the water storage pool and the municipal pipe network.

[0026] The present application can realize step-by-step operation of infiltration, temporary storage, regulation and discharge for different rainfall, and the in-situ backfilling does not produce runoff in light rain, the runoff peak is reduced to avoid local waterlogging in moderate rain, and the rapid flood discharge relieves the pressure of the pipe network in heavy rain / rainstorm, the whole process covers different rainfall conditions, effectively reduces the risk of waterlogging of the paved square and the surrounding area, and at the same time, the rainwater in the light rain and moderate rain stages is infiltrated back to the groundwater to improve the soil moisture content of the surrounding area, and the rainwater in the heavy rain / rainstorm stage is regulated and stored by the regional regulation pool 4 and filtered by the filtering port 42, so that the rainwater can be reused, the dependence on municipal water supply is reduced, and the concept of sponge city construction is met.

[0027] Further, the floating ball sealing module 16 comprises a support block 161, a T-shaped sliding rod 162, a first floating ball 163, a pulley 164, a wheel carrier 165, a water inlet pipe 166, an axial sliding support block 167, an axial sliding rod 168, a conical sealing plug 169, a return spring 1610 and a pull rope 1611; at least three support blocks 161 are fixed at equal intervals on the inner side walls of the water infiltration groove 11, the T-shaped sliding rod 162 is in sliding fit with the support blocks 161, the first floating ball 163 is fixedly connected to the top end of the T-shaped sliding rod 162, the water inlet pipe 166 is fixedly connected in the water inlet between the water infiltration groove 11 and the main water storage cavity 19, the water inlet pipe 166 is provided in one-to-one correspondence with the first floating ball 163, the axial sliding support block 167 is fixedly connected to one end of the water inlet pipe 166 close to the main water storage cavity 19, the axial sliding rod 168 is slidably arranged at the center position of the axial sliding support block 167, the conical sealing plug 169 is fixedly connected to one end of the axial sliding rod 168, the return spring 1610 is sleeved outside the axial sliding rod 168, and the two ends of the return spring 1610 are connected with the conical sealing plug 169 and the axial sliding support block 167 respectively, and the two ends of the pull rope 1611 are fixedly connected with the conical sealing plug 169 and the first floating ball 163 respectively.

[0028] In moderate rain, the speed of rainwater flowing into the water infiltration groove 11 exceeds the infiltration speed, and the water level in the groove continues to rise, when the water level submerges the first floating ball 163 and reaches a set height, the first floating ball 163 drives the T-shaped sliding rod 162 to slide upward along the support block 161 under the action of buoyancy, and the pull rope 1611 connected thereto is synchronously pulled upward, the other end of the pull rope 1611 is connected with the conical sealing plug 169, the pulling force overcomes the elastic force of the return spring 1610, drives the conical sealing plug 169 to move along the axial sliding rod 168 in a direction away from the water inlet pipe 166, and thus opens the passage of the water inlet pipe 166; At this time, the excess rainwater in the water infiltration groove 11 flows into the main water storage cavity 19 through the water inlet pipe 166 for temporary storage, realizing the hierarchical temporary storage of rainwater. When the rainfall intensity decreases or stops, the water level in the water infiltration groove 11 decreases, the buoyancy of the first floating ball 163 decreases, the elastic force of the reset spring 1610 dominates, the conical sealing plug 169 is pushed to reset and block the water inlet pipe 166, preventing the rainwater in the main water storage cavity 19 from flowing back to the water infiltration groove 11, and ensuring the stability of the water storage in the main water storage cavity 19; The support block 161 provides stable sliding guidance for the T-shaped sliding rod 162, and the axial sliding support block 167 positions the axial sliding rod 168 and the reset spring 1610, so as to ensure that the opening and closing actions of the conical sealing plug 169 are accurately controllable. The water inlet pipe 166 and the first floating ball 163 are one-to-one corresponding, so that the synchronous or independent work of multiple sealing mechanisms can be realized, and the flexibility of overall regulation and control is improved.

[0029] Further, the side surface of the support block 161 is fixedly connected with a wheel frame 165, the wheel frame 165 is rotatably connected with a pulley 164 through a rotating shaft, and the pull rope 1611 is wound around the pulley 164.

[0030] In moderate rain weather, when the water level in the water infiltration groove 11 rises to drive the first floating ball 163 to float up, the pull rope 1611 connected with the first floating ball 163 is wound around the pulley 164 inside the wheel frame 165, and the pulley 164 rotates in the wheel frame 165 through the rotating shaft. By arranging the pulley 164, the transmission direction of the pulling force can be changed, and the sliding friction between the pull rope 1611 and the wheel frame 165 is converted into the rolling friction of the pulley 164, so that the resistance loss in the process of transmitting the pulling force is greatly reduced. The pulling force of the first floating ball 163 can be more efficiently and stably transmitted to the conical sealing plug 169, the wear of the pull rope 1611 is reduced, the service life of the components is prolonged, and the response sensitivity of the floating ball sealing module 16 to water level changes is improved.

[0031] Further, the inside of the water infiltration groove 11 is fixedly connected with a stepped flow guide block 13, the bottom of the stepped flow guide block 13 is provided with a water infiltration opening 14, the water infiltration opening 14 penetrates through the bottom of the water permeable brick body 1, the bottom surface of the water permeable brick body 1 is fixedly connected with a brick body water permeable pipe 15, the positions of the water infiltration opening 14 and the brick body water permeable pipe 15 correspond to each other, and a detachable stainless steel filter screen 12 is arranged in the groove of the water infiltration groove 11.

[0032] When it rains, the rainwater first falls on the surface of the water permeable brick body 1, part of which flows into the water infiltration groove 11 along the brick surface. The detachable stainless steel filter screen 12 of the groove can first intercept large-particle impurities such as fallen leaves and sand, so as to prevent the impurities from entering the groove and blocking the water infiltration channel. The detachable design facilitates regular cleaning and maintenance in the later period. The rainwater entering the water infiltration groove 11 flows uniformly to the groove bottom under the guidance of the stepped flow guide block 13, avoiding local water flow gathering and impacting the groove structure. The rainwater reaching the groove bottom flows into the brick body water-permeable pipe 15 below through the water infiltration port 14. The water infiltration port 14 is correspondingly arranged with the brick body water-permeable pipe 15, ensuring that the rainwater can be directed and smoothly infiltrated into the gravel cushion 2. In light rain, the rainwater in the water infiltration groove 11 can be completely infiltrated and discharged through the water infiltration port 14 and the brick body water-permeable pipe 15, without the need to activate the floating ball sealing module 16. When it is moderate rain or above, the rainwater inflow speed exceeds the infiltration speed, and the water level in the groove rises to trigger the floating ball sealing module 16 to act, realizing the diversion and temporary storage of rainwater to the main water storage cavity 19.

[0033] It should be noted that the stepped structure of the stepped flow guide block 13 can disperse and guide the rainwater flowing into the water infiltration groove 11 to different areas of the groove bottom, avoiding the concentration of rainwater impacting local positions, ensuring that multiple water infiltration ports 14 can uniformly intake water, and improving the overall infiltration efficiency in light rain. At the same time, the level difference of the steps can slow down the flow speed of the rainwater in the groove, allowing the fine silt and other impurities entrained in the rainwater to settle in the gaps between the steps, reducing the probability of impurities entering the brick body water-permeable pipe 15 and causing blockage.

[0034] Embodiment Two Improvements based on Embodiment One: Further, the base layer flow pipe network includes a brick body flow guide pipe 17, a one-way flow guide valve 18, a main water guide pipe 32, a main drainage pipe 33, a branch drainage pipe 34, a branch flow pipe 35, and a main flow pipe 36. The brick body flow guide pipe 17 is fixedly connected at the center position of the bottom surface of the water-permeable brick body 1, and the brick body flow guide pipe 17 is in communication with the main water storage cavity 19. The one-way flow guide valve 18 is fixedly connected inside the brick body flow guide pipe 17. The main water guide pipe 32 is embedded inside the gravel cushion 2. The main drainage pipe 33 is fixedly connected at the bottom surface of the main water guide pipe 32, and the bottom end of the main drainage pipe 33 extends to the inner top of the distributed water storage groove 3. The water-permeable brick bodies 1 are arranged in rows. The brick body flow guide pipes 17 at the bottom surface of the same row of water-permeable brick bodies 1 are connected in communication with the branch flow pipes 35. The branch drainage pipe 34 is fixedly connected between each branch flow pipe 35 and the main water guide pipe 32. The main flow pipe 36 is fixedly connected symmetrically on both sides of the main water guide pipe 32, and the first water infiltration hole is formed on the surface of each main flow pipe 36.

[0035] In moderate rain or above, when the rainwater temporarily stored in the main water storage cavity 19 reaches a certain volume, the water pressure drives the one-way flow guide valve 18 to open, and the rainwater flows out through the brick body flow guide pipe 17. The brick body flow guide pipes 17 of the same row of water-permeable brick bodies 1 are connected to the branch flow pipes 35, realizing the concentration of single-row rainwater, and then the rainwater is collected through the branch drainage pipe 34 and flows into the main water guide pipe 32 embedded in the gravel cushion 2. The main water pipe 32 transports the collected rainwater to the distributed water storage tank 3 through the main drain pipe 33 at the bottom. The distributed water storage tank 3 can slowly infiltrate the rainwater into the soil through its own water infiltration structure. At the same time, the infiltrated rainwater in the gravel cushion 2 flows into the main flow pipe 36 through the first water infiltration hole of the main flow pipe 36, and then flows into the main water pipe 32, further improving the rainwater collection efficiency. The core function of the one-way flow valve 18 is to prevent the rainwater in the distributed water storage tank 3 or the main water pipe 32 from flowing back to the main water storage cavity 19, ensuring the one-way nature of the water flow direction. The hierarchical flow design of the pipe network realizes the orderly collection and transportation of rainwater, avoiding the problem of water accumulation and blockage in the pipe network.

[0036] It should be noted that the connection between all pipes in the base flow pipe network adopts a flange connection method, including the connection between the brick flow pipe 17 and the branch flow pipe 35, the branch flow pipe 35 and the branch drain pipe 34, the branch drain pipe 34 and the main water pipe 32, the main water pipe 32 and the main flow pipe 36, and the main water pipe 32 and the main drain pipe 33. The flange connection has the advantages of high connection strength and good sealing performance, which can effectively prevent leakage of the pipe network during rainwater transportation, and is convenient for disassembly, maintenance and maintenance in the later stage; The outer surface of the main flow pipe 36 in the base flow pipe network is wrapped with a water-permeable geotextile. The water-permeable geotextile allows rainwater to infiltrate into the pipe interior while intercepting sand and stone particles, soil impurities, and other impurities in the gravel cushion 2, preventing the infiltration holes of the pipe wall and the pipe connection parts from being blocked, and ensuring the long-term stable rainwater collection and transportation efficiency of the main flow pipe 36.

[0037] Further, the gravel cushion 2 is divided into two layers, the lower layer is a load-bearing leveling layer using 20-30mm diameter gravel, and the upper layer is a flow guiding layer using 10-15mm diameter gravel. The flow guiding layer is laid in a slope structure with a low center and high periphery, forming a 1%-2% flow slope. A medium sand leveling layer is laid on the top of the gravel cushion 2, and the water-permeable bricks 1 are laid on the medium sand leveling layer.

[0038] The gravel cushion 2 is divided into two layers, the lower layer is a load-bearing leveling layer using 20-30mm diameter gravel, and the upper layer is a flow guiding layer using 10-15mm diameter gravel. The flow guiding layer is laid in a slope structure with a low center and high periphery, forming a 1%-2% flow slope. A medium sand leveling layer is laid on the top of the gravel cushion 2, and the water-permeable bricks 1 are laid on the medium sand leveling layer. When it is light rain, the rainwater seeping through the water-permeable pipe 15 of the brick body penetrates into the convergence and guidance layer along the slope to the center and then seeps into the load-bearing and leveling layer and finally into the soil; when it is moderate rain or above, the main convergence pipe 36 can efficiently collect the concentrated water flow in the convergence and guidance layer and converge into the main water guide pipe 32, improving the rainwater collection efficiency. The middle sand leveling layer at the top of the cushion layer can fill the gap between the bottom of the water-permeable brick body 1 and the gravel cushion layer 2, avoiding loosening and collapse of the water-permeable brick body 1, and filtering the fine silt in the rainwater, further protecting the lower gravel pores from being blocked.

[0039] Further, the main convergence pipes 36 are embedded in the interior of the gravel cushion layer 2, and the embedding slope of the main convergence pipes 36 is consistent with the 1%-2% convergence slope of the convergence and guidance layer, for collecting the rainwater in the gravel cushion layer 2.

[0040] The synchronous slope design of the main convergence pipes 36 allows the rainwater collected around the pipes to seep into the first water seepage hole of the pipe body, without the need for additional power driving, realizing efficient collection and transportation of the rainwater. The embedding mode consistent with the slope of the cushion layer allows the rainwater in the pipe to flow along the slope to the main water guide pipe 32, without forming stagnant water in the pipe. At the same time, the directional flow of the water flow can drive a small amount of impurities in the pipe to be discharged together, reducing the deposition of impurities at the pipe wall and water seepage hole, and long-term maintaining the water collection smoothness of the pipe.

[0041] Further, the upper position of the inner wall of the regional water storage tank 4 corresponding to the direct discharge port 41 is fixedly connected with a first positioning block 43 in a symmetrical manner, the first positioning block 43 is rotatably connected with a first rotating rod 44 between two first positioning blocks 43, the surface of the rod body of the first rotating rod 44 is fixedly sleeved with a first cover plate 45, the size of the first cover plate 45 is matched with the direct discharge port 41, the upper position of the inner wall of the regional water storage tank 4 corresponding to the filter port 42 is fixedly connected with a second positioning block 47 in a symmetrical manner, the second positioning block 47 is rotatably connected with a second rotating rod 48 between two second positioning blocks 47, the surface of the rod body of the second rotating rod 48 is fixedly sleeved with a second cover plate 49, the size of the second cover plate 49 is matched with the filter port 42, one end of the first rotating rod 44 penetrates through one of the first positioning blocks 43 and is fixedly connected with an A gear 46, one end of the second rotating rod 48 penetrates through one of the second positioning blocks 47 and is fixedly connected with a B gear 410, the inside of the regional water storage tank 4 is fixedly connected with two guide sliding rods 413, the surfaces of the two guide sliding rods 413 are slidably sleeved with a guide seat 412, one side of the guide seat 412 is fixedly connected with an inverted Z-shaped rack 411, the right side of the A gear 46 is engaged with the inverted Z-shaped rack 411, the left side of the B gear 410 is engaged with the inverted Z-shaped rack 411, the side of the guide seat 412 away from the inverted Z-shaped rack 411 is fixedly connected with a second floating ball 414.

[0042] Further, the buoyancy value of the second floating ball 414 is greater than the sum of the water resistance and the sliding friction of the guide seat 412 when the first cover plate 45 and the second cover plate 49 are opened and closed, so as to drive the guide seat 412 to slide along the guide slide rod 413 and drive the inverted Z-shaped rack 411 to move.

[0043] In use, when the water level in the regional storage tank 4 is low, the second floating ball 414 is at a low position with the water level, driving the guide seat 412 to move downward along the guide slide rod 413, and the inverted Z-shaped rack 411 fixed thereto moves downward synchronously. At this time, the right side of the inverted Z-shaped rack 411 is in meshing transmission with the A gear 46, driving the first rotating rod 44 to rotate, so that the first cover plate 45 remains in a closed state to block the direct discharge port 41; at the same time, the left side of the inverted Z-shaped rack 411 is in meshing transmission with the B gear 410, driving the second rotating rod 48 to rotate reversely, so that the second cover plate 49 is in an open state, and the filtering port 42 is unobstructed. The rainwater in the storage tank flows into the purification equipment through the filtering port 42, and is discharged into the municipal pipe network after treatment, thereby ensuring the water quality; When it is heavy rain / rainstorm weather, the overflowed rainwater of the distributed storage tank 3 continuously flows into the storage tank, and the water level in the storage tank rises rapidly. The second floating ball 414 drives the guide seat 412 to move upward along the guide slide rod 413 under the action of buoyancy, and the inverted Z-shaped rack 411 moves upward synchronously. The right side of the rack drives the A gear 46 to rotate reversely, driving the first rotating rod 44 to overturn, so that the first cover plate 45 is opened, the direct discharge port 41 is unobstructed, and a large amount of rainwater is rapidly discharged; at the same time, the left side of the rack drives the B gear 410 to rotate reversely, driving the second rotating rod 48 to overturn, so that the second cover plate 49 is closed to block the filtering port 42, thereby avoiding that impurities block the filtering equipment under high water flow rate.

[0044] It should be noted that the special structure of the inverted Z-shaped rack 411 realizes single driving source bidirectional transmission, and the opening and closing actions of the two cover plates are linked and interlocked, so as to avoid the fault of simultaneous opening or closing; The guide slide rod 413 limits the movement track of the guide seat 412, prevents the rack from deviating to cause meshing failure of the gear, and ensures the stability of the mechanism.

[0045] It should be noted that the buoyancy can be matched according to actual use requirements. When the water level in the regional storage tank 4 rises, the buoyancy of the second floating ball 414 needs to overcome multiple resistances: first, the reverse impact force of the water flow on the cover plate during the opening of the first cover plate 45 and the closing of the second cover plate 49; second, the sliding friction between the guide seat 412 and the guide slide rod 413; and third, the mechanical resistance during meshing transmission of the gear and the rack. If the buoyancy is insufficient, the guide seat 412 will be stuck, the cover plates cannot be opened and closed to the position, and the effective switching of the discharge path cannot be realized.

[0046] Under heavy rain / storm working conditions, the water level of the reservoir rises quickly, and sufficient buoyancy can drive the guide seat 412 to move upward along the guide slide rod 413 quickly, drive the inverted Z-shaped rack 411 to move synchronously, realize the quick switching of the first cover plate 45 and the second cover plate 49, and avoid the risk of overflow due to the delay of action.

[0047] During long-term use, the guide slide rod 413 may be slightly rusted, and the gear and rack meshing surface may accumulate impurities, causing a small increase in resistance. A sufficient buoyancy margin is preset to offset such resistance changes in later use, ensuring the consistency of the mechanism in the whole life cycle, without frequent adjustment and maintenance.

[0048] Working principle: when the application is used, first, the foundation pit is excavated according to the designed size, the bottom is rammed and leveled, and then the impermeable geomembrane is laid, and the recess corresponding to the position of the distributed water storage tank 3 is reserved to ensure that the tank body is flush with the base after being placed, avoiding water seepage; Then lay the lower bearing leveling layer: use gravel with a particle size of 20-30mm, control the thickness according to the design requirements, ensure the structural strength after compaction, and then lay the upper flow guiding layer on the surface: use gravel with a particle size of 10-15mm, lay it into a slope structure with a center low and a periphery high with a slope of 1%-2%, and simultaneously embed the main flow pipe 36 at the interface between the two gravel cushion layers 2 to ensure that the pipe laying slope is completely consistent with the flow guiding layer, and the first water seepage hole of the pipe body faces upward; Then lay the main water guide pipe 32 at the center low position of the gravel cushion layer 2, and weld the main drain pipe 33 at the bottom to ensure that the bottom end of the main drain pipe 33 extends to the top of the distributed water storage tank 3; place the distributed water storage tank 3 and fix it, check the connection sealing of the main drain pipe 33, prevent water leakage, and simultaneously connect the end of the main flow pipe 36 with the main water guide pipe 32; Subsequently, lay the medium sand leveling layer on the top of the gravel cushion layer 2, and the thickness is uniform. After leveling and compaction, lay the water permeable brick body 1 on it, fill the gap between the brick bodies with water permeable sealant, and simultaneously ensure that the brick body guide pipe 17 at the bottom of the water permeable brick body 1 is accurately connected with the branch flow pipe 35 below, the branch flow pipe 35 is connected with the main water guide pipe 32 through the branch drain pipe 34, and the one-way guide valve 18 is installed inside the brick body guide pipe 17. Then install the regional storage pond 4, which is connected to the overflow port of the distributed storage tank 3 through a rectangular communication pipe 5; on the inner wall of the storage pond, corresponding to the upper position of the straight discharge port 41 and the filter port 42, respectively fix the first positioning block 43 and the second positioning block 47, and assemble the first rotating rod 44, the first cover plate 45, the A gear 46, and the second rotating rod 48, the second cover plate 49, and the B gear 410; install the guide slide rod 413 and the guide seat 412, fix the inverted Z-shaped rack 411 on one side of the guide seat 412 to ensure that it precisely engages with the A gear 46 and the B gear 410; finally, fix the second floating ball 414 on the other side of the guide seat 412, and debug to ensure smooth sliding of the guide seat 412 and that the buoyancy of the second floating ball 414 meets the driving requirements; Fill the water seepage tank 11 with water, test whether the floating ball sealing module 16 is sensitive to opening and closing; fill the regional storage pond 4 with water, test whether the hierarchical discharge linkage mechanism switches accurately; check whether each pipe network connection leaks, and complete the construction after confirming that there are no errors.

[0049] After the device is constructed, based on the difference in the amount of rainwater collected, three working stages are automatically triggered to achieve hierarchical collection, storage, and discharge: In light rain, rainwater falls on the surface of the permeable brick 1, part of which directly seeps into the gravel cushion 2 through the brick pores, and the rest flows into the water seepage tank 11. After being intercepted by the stainless steel filter screen 12, the rainwater is uniformly guided to the bottom of the tank under the guidance of the stepped flow guide block 13, and seeps into the convergence guide layer of the gravel cushion 2 through the water seepage port 14 and the brick permeable pipe 15. The rainwater flows along the slope structure to the center, part of which seeps into the lower bearing and leveling layer and eventually replenishes the soil, and part of which enters the pipeline through the first water seepage hole of the main convergence pipe 36, converges into the main water guide pipe 32, and then flows into the distributed storage tank 3, slowly seeping back. The rainwater collection speed in this stage is less than the seepage speed, and the water level in the water seepage tank 11 does not rise significantly, the floating ball sealing module 16 is not triggered, and the main storage cavity 19 is not used; In moderate rain, the rainwater collection speed exceeds the seepage speed of the gravel cushion 2, the water level in the water seepage tank 11 continues to rise, and the first floating ball 163 is submerged and reaches the set height. The first floating ball 163 drives the T-shaped slide rod 162 to move upward along the support block 161 under the action of buoyancy, the pull rope 1611 is transmitted around the pulley 164, the conical sealing plug 169 is pulled to open the water inlet pipe 166 by overcoming the elastic force of the return spring 1610. The excess rainwater in the water seepage tank 11 flows into the main storage cavity 19 through the water inlet pipe 166 for temporary storage, and when the water level in the cavity reaches a certain height, the water pressure drives the one-way flow valve 18 to open, the rainwater flows into the branch convergence pipe 35 through the brick flow guide pipe 17, then converges into the branch drainage pipe 34, and finally converges into the main water guide pipe 32, which is finally transported to the distributed storage tank 3. In this stage, the water level in the distributed storage tank 3 slowly rises and does not reach the height of the overflow port, so the regional storage pond 4 does not participate in the work; In heavy rain / storm weather, the rainwater inflow continues to increase, the water level in the distributed water storage tank 3 rises rapidly and reaches the height of the overflow port, and the excess rainwater flows into the regional storage tank 4 through the rectangular connecting pipe 5. When the water level in the storage tank is low, the second floating ball 414 is at a low position, driving the guide seat 412 to move downward along the guide slide rod 413, and the inverted Z-shaped rack 411 moves downward synchronously, driving the A gear 46 on the right side to rotate, so that the first cover plate 45 is closed to block the straight drainage port 41; the B gear 410 on the left side rotates reversely, so that the second cover plate 49 is opened to unblock the filter port 42, and the rainwater flows into the purification equipment through the filter port 42 and is discharged into the municipal pipe network after treatment; With the continuous inflow of rainwater, the water level in the storage tank rises rapidly, the second floating ball 414 drives the guide seat 412 to move upward, the inverted Z-shaped rack 411 moves upward synchronously, the A gear 46 on the right side reversely rotates, the first cover plate 45 is opened, and the straight drainage port 41 is unblocked to realize rapid flood discharge; the B gear 410 on the left side reversely rotates, the second cover plate 49 is closed to block the filter port 42, so as to avoid that the high-speed water flow carries impurities to block the filter equipment. In this stage, relying on the buoyancy of the second floating ball 414 (greater than the sum of the water resistance of the cover plate and the friction of the guide seat 412), the linkage mechanism can move accurately and timely, and the overflow of the storage tank is avoided. After the rainfall weakens, the water level in the regional storage tank 4 decreases, the second floating ball 414 drives the guide seat 412 to move downward, and the mechanism automatically resets to the filter discharge state in the low water level stage; the water level in the water seepage tank 11 decreases, the first floating ball 163 has reduced buoyancy, the reset spring 1610 pushes the conical sealing plug 169 to block the water inlet pipe 166, the main storage cavity 19 stops draining water, and the device gradually returns to the initial state.

[0050] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all variations falling within the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0051] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A rainwater harvesting and storage system simulating a traditional paved plaza, comprising a surface paving unit, a base layer infiltration unit, and a regional storage unit, characterized in that: The surface paving unit includes several permeable brick bodies (1) laid flat and assembled. The gaps between adjacent permeable brick bodies (1) are filled with permeable sealant. A main water storage chamber (19) is opened inside the permeable brick body (1). A seepage groove (11) is opened on the side of the permeable brick body (1). A float sealing module (16) is evenly spaced between each seepage groove (11) and the main water storage chamber (19). The float sealing module (16) is used to control the opening and closing of the inlet of the main water storage chamber (19) according to the water level in the seepage groove (11). The base permeable unit includes a distributed water storage tank (3) buried 30cm below the permeable brick body (1) and a base flow network connected to the distributed water storage tank (3). A crushed stone cushion layer (2) is laid between the distributed water storage tank (3) and the permeable brick body (1), and the base flow network is embedded in the crushed stone cushion layer (2). The regional storage unit includes a reinforced concrete regional storage tank (4), which is located on the side of the paved area. A rectangular connecting pipe (5) is fixedly connected between the overflow port on the side of the distributed water storage tank (3) and the regional storage tank (4). The regional storage tank (4) has a direct discharge port (41) and a filter port (42) on the side near the municipal pipe network. The direct discharge port (41) is located above the filter port (42).

2. The rainwater harvesting and storage system for simulating a traditional paved plaza according to claim 1, characterized in that: The float sealing module (16) includes a support block (161), a T-shaped slide rod (162), a first float (163), a pulley (164), a wheel frame (165), a water inlet pipe (166), an axial sliding support block (167), an axial slide rod (168), a conical sealing plug (169), a return spring (1610), and a pull rope (1611); at least three support blocks (161) are fixed at equal intervals on the inner wall of the seepage tank (11), the T-shaped slide rod (162) slides with the support block (161), the first float (163) is fixedly connected to the top of the T-shaped slide rod (162), and a water inlet pipe (166) is fixedly connected to the water inlet between the seepage tank (11) and the main water storage chamber (19). The water inlet pipe (166) and the first float (163) are arranged in a one-to-one correspondence. The end of the water inlet pipe (166) near the main water storage chamber (19) is fixedly connected to the axial sliding support block (167) through the support shaft. The axial slide rod (168) slides through the center of the axial sliding support block (167). The conical sealing plug (169) is fixedly connected to one end of the axial slide rod (168). The return spring (1610) is sleeved on the outside of the axial slide rod (168), and the two ends of the return spring (1610) are respectively connected to the conical sealing plug (169) and the axial sliding support block (167). The two ends of the pull rope (1611) are respectively fixedly connected to the conical sealing plug (169) and the first float (163).

3. The rainwater harvesting and storage system for simulating a traditional paved plaza according to claim 2, characterized in that: The support block (161) is fixedly connected to a wheel frame (165) on its side. A pulley (164) is rotatably connected inside the wheel frame (165) via a rotating shaft. The pull rope (1611) is wound around the pulley (164).

4. The rainwater harvesting and storage system for simulating a traditional paved plaza according to claim 1, characterized in that: The interior of the seepage trough (11) is fixedly connected to a stepped guide block (13), and the bottom of the stepped guide block (13) is provided with a seepage port (14). The seepage port (14) penetrates the bottom of the permeable brick body (1). The bottom surface of the permeable brick body (1) is fixedly connected to a brick permeable pipe (15). The positions of the seepage port (14) and the brick permeable pipe (15) correspond one-to-one. A detachable stainless steel filter screen (12) is provided in the trough of the seepage trough (11).

5. The rainwater harvesting and storage system for simulating a traditional paved plaza according to claim 1, characterized in that: The basic drainage network includes a brick guide pipe (17), a one-way guide valve (18), a main water pipe (32), a main drainage pipe (33), a branch drainage pipe (34), a branch drainage pipe (35), and a main drainage pipe (36). The brick guide pipe (17) is fixedly connected to the center of the bottom surface of the permeable brick body (1), and the brick guide pipe (17) is connected to the main water storage chamber (19). The one-way guide valve (18) is fixedly connected inside the brick guide pipe (17). The main water pipe (32) is embedded inside the crushed stone cushion layer (2). Several of the main drainage pipes (33) are fixedly connected to the main drainage chamber (19). The bottom surface of the main water pipe (32) and the bottom ends of several main drainage pipes (33) extend to the inner top of the distributed water storage tank (3). Several permeable bricks (1) are arranged in a row. The brick guide pipes (17) on the bottom surface of the same row of permeable bricks (1) are connected to branch manifolds (35). Each branch manifold (35) and the main water pipe (32) are fixedly connected to a branch drainage pipe (34). Several main manifolds (36) are symmetrically fixedly connected to both sides of the main water pipe (32). Each main manifold (36) has a first seepage hole on its pipe surface.

6. The rainwater harvesting and storage system for simulating a traditional paved plaza according to claim 5, characterized in that: The distributed water storage tank (3) has several second seepage holes (31) on its side and bottom, and a permeable geotextile is laid between the distributed water storage tank (3) and the excavated foundation.

7. The rainwater harvesting and storage system for simulating a traditional paved plaza according to claim 5, characterized in that: The crushed stone cushion layer (2) is divided into two layers: the lower layer is a load-bearing leveling layer, which uses crushed stone with a particle size of 20-30mm, and the upper layer is a flow guiding layer, which uses crushed stone with a particle size of 10-15mm. The flow guiding layer is laid in a sloping structure with a low center and high sides, forming a flow slope of 1%-2%. The top of the crushed stone cushion layer (2) is covered with a medium sand leveling layer, and the permeable brick body (1) is laid flat on the medium sand leveling layer.

8. The rainwater harvesting and storage system for simulating a traditional paved plaza according to claim 6, characterized in that: Several of the main manifolds (36) are pre-embedded inside the gravel cushion layer (2), and the burial slope of the main manifolds (36) is consistent with the 1%-2% flow slope of the flow guide layer, for infiltration and collection of rainwater in the gravel cushion layer (2).

9. The rainwater harvesting and storage system for simulating a traditional paved plaza according to claim 1, characterized in that: A first positioning block (43) is symmetrically fixedly connected to the inner wall of the regional regulating water tank (4) above the direct discharge port (41). A first rotating rod (44) is rotatably connected between the two first positioning blocks (43). A first cover plate (45) is fixedly sleeved on the surface of the first rotating rod (44). The size of the first cover plate (45) is adapted to the direct discharge port (41). A second positioning block (47) is symmetrically fixedly connected to the inner wall of the regional regulating water tank (4) above the filter port (42). A second rotating rod (48) is rotatably connected between the two second positioning blocks (47). A second cover plate (49) is fixedly sleeved on the surface of the second rotating rod (48). The size of the second cover plate (49) is adapted to the filter port (42). One end of (44) passes through one of the first positioning blocks (43) and is fixedly connected to gear A (46). One end of the second rotating rod (48) passes through one of the second positioning blocks (47) and is fixedly connected to gear B (410). Two guide slide rods (413) are fixedly connected inside the regional water storage tank (4). Guide seats (412) are slidably sleeved on the surfaces of the two guide slide rods (413). A reverse Z-shaped rack (411) is fixedly connected to one side of the guide seat (412). The right side of gear A (46) meshes with the reverse Z-shaped rack (411), and the left side of gear B (410) meshes with the reverse Z-shaped rack (411). A second float (414) is fixedly connected to the side of the guide seat (412) away from the reverse Z-shaped rack (411).

10. The rainwater harvesting and storage system for simulating a traditional paved plaza according to claim 9, characterized in that: The buoyancy of the second float (414) is greater than the sum of the water resistance and sliding friction of the guide seat (412) when the first cover plate (45) and the second cover plate (49) are opened and closed, so as to drive the guide seat (412) to slide along the guide slide rod (413) and drive the inverted Z-shaped rack (411) to move.

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