Utilizing the rainwater drainage and collection system of garden landscape

Abstract

This invention relates to the field of urban drainage and water collection systems, and in particular to a rainwater drainage and water collection system utilizing a garden landscape. The rainwater drainage and water collection system utilizing a garden landscape includes: a rain garden storage area, a primary rainwater collection tank, a secondary rainwater collection tank, a tertiary rainwater collection tank, and a sunken plaza. Each of the primary, secondary, and tertiary rainwater collection tanks is equipped with an expansion and infiltration cylinder, the inlet of which is equipped with an electrically controlled valve, allowing for graded adjustment of storage capacity according to rainfall. The tertiary rainwater collection tank contains a filter gabion wall, within which plants are grown. The rainwater drainage and water collection system utilizing a garden landscape provided by this invention has strong drainage and water collection capabilities, and also offers a pleasing aesthetic appeal.

Description

Technical Field

[0001] This invention relates to the field of urban drainage and water collection systems, and in particular to a rainwater drainage and water collection system that utilizes garden landscapes. Background Technology

[0002] Currently, surface runoff in urban sites is primarily drained through the site's underground small-scale municipal stormwater drainage network. Taking garden and landscape sites as an example: in urban parks, green spaces, and landscape plazas, surface runoff is mainly drained through the site's underground small-scale municipal stormwater drainage network. During rainfall, runoff from building roofs, paved surfaces, and green spaces directly enters the site's underground small-scale municipal stormwater drainage network through conventional storm drains and grates. The rainwater is then transported from the small-scale municipal stormwater drainage network to the main municipal stormwater drainage network outside the site. Rainwater collection in garden and landscape sites typically involves runoff entering the underground small-scale municipal stormwater drainage network through storm drains within the site, and then flowing into the site's underground storage tank.

[0003] During extreme rainfall, the instantaneous rainfall volume is large, the rainfall duration is long, and the demand for drainage is high. However, the drainage capacity of the city's main municipal stormwater network is limited. In the early stages of extreme rainfall, all local municipal stormwater networks within the city drain water into the main municipal network outside the site. As the rainfall lasts longer, the runoff and water volume increase, and the local municipal stormwater networks continuously drain water into the main municipal network, easily causing the main municipal stormwater network to reach full capacity. As the rainfall continues, the local municipal networks are unable to drain the excess rainwater, leading to waterlogging. At the same time, the widespread hardening of surfaces in urban built-up areas results in a large surface runoff, further increasing the surface runoff during rainfall. Consequently, during extreme rainfall, the demand for site drainage increases, the pressure on the municipal stormwater network increases, and the risk of flooding increases.

[0004] Rainwater harvesting in garden and landscape sites also relies on the site's stormwater pipe network. Rainwater is collected into rainwater pools at the end of the rainwater harvesting system using rainwater grates and pipelines. In the event of extreme rainfall events, if the rainfall recurrence period exceeds the design standard of the stormwater recurrence period in the site's small municipal design, the instantaneous runoff within the site will be large, and the stormwater pipes within the site will also be full. This will prevent rainwater from entering the small municipal pipelines, increasing the risk of waterlogging.

[0005] In summary, the existing site relies on traditional small municipal stormwater drainage networks for rainwater drainage and collection, which poses a significant risk of flooding and waterlogging. Summary of the Invention

[0006] The purpose of this invention is to provide a rainwater drainage and collection system that utilizes garden landscapes, so as to solve to some extent the technical problems of existing technologies that rely on traditional small municipal rainwater pipe networks for rainwater drainage and collection, resulting in a high risk of waterlogging.

[0007] This invention provides a rainwater drainage and collection system utilizing a garden landscape, comprising: a rain garden storage area, a primary rainwater collection tank, a secondary rainwater collection tank, and a tertiary rainwater collection tank; the top of the primary rainwater collection tank has a primary connection opening for external communication, and a primary grate is installed at the primary connection opening; the top of the secondary rainwater collection tank has a secondary connection opening for external communication, and a secondary grate is installed at the secondary connection opening; the top of the tertiary rainwater collection tank has a tertiary open opening for penetrating the ground surface, and the tertiary open opening is covered with a walkway. The rainwater collection system includes a grate; the primary rainwater collection tank is located within the rain garden storage area, and the primary connection opening is higher than the bottom of the rain garden storage area; the volume of the secondary rainwater collection tank is greater than that of the primary rainwater collection tank and smaller than that of the tertiary rainwater collection tank; the cross-sectional area of ​​the secondary connection opening is greater than that of the primary connection opening and smaller than that of the tertiary open opening; the primary rainwater collection tank and the secondary rainwater collection tank, as well as the secondary rainwater collection tank and the tertiary rainwater collection tank, are all connected by underground connecting pipes. When rainfall is light, rainwater can be stored in the rain garden's storage area. When rainfall is heavy, and the water volume in the rain garden's storage area reaches a certain level, rainwater can overflow into the primary rainwater collection tank through the primary connection. Runoff rainwater can also directly enter the secondary rainwater collection tank through the secondary connection, and runoff rainwater can also directly enter the tertiary rainwater collection tank through the tertiary open outlet. When the water volume in the primary rainwater collection tank reaches a certain level, rainwater overflows into the underground connecting pipe between the primary and secondary rainwater collection tanks, and then flows into the secondary rainwater collection tank through this underground connecting pipe. When the water volume in the secondary rainwater collection tank reaches a certain level... Rainwater overflowing from the secondary rainwater collection tank flows into the underground connecting pipe between the secondary and tertiary rainwater collection tanks, and then enters the tertiary rainwater collection tank. The primary grating filters the rainwater entering the primary rainwater collection tank, thereby intercepting large particulate pollutants (such as fallen leaves, branches, or large pieces of garbage). The secondary grating filters the rainwater entering the secondary rainwater collection tank, thereby intercepting large particulate pollutants (such as fallen leaves, branches, or large pieces of garbage). The tertiary walkway grating filters the rainwater entering the tertiary rainwater collection tank, thereby intercepting large particulate pollutants (such as fallen leaves, branches, or large pieces of garbage).During periods of heavy rainfall, rainwater can flow into the rain garden storage area, the secondary rainwater collection pond, and the tertiary rainwater collection pond, achieving rapid drainage without the need for a complex pipe network. The cross-sectional area of ​​the primary connection point, the secondary connection point, and the tertiary open point increases sequentially, ensuring smooth rainwater flow into the ponds during heavy rainfall. This allows surface runoff rainwater to be quickly and directly discharged into the secondary and tertiary rainwater collection ponds during extreme weather, thereby improving the site's drainage capacity and reducing the risk of flooding. The rain garden storage area, the primary rainwater collection pond, the secondary rainwater collection pond, and the tertiary rainwater collection pond all collect rainwater effectively, further reducing the risk of flooding. Therefore, the rainwater drainage and collection system provided by this invention enables rapid drainage, provides excellent water collection capacity, and thus reduces the risk of flooding.

[0008] Furthermore, the rainwater drainage and collection system utilizing the garden landscape also includes a secondary rainwater collection tank. The top of the rainwater collection tank is provided with a secondary connection port for connecting to the outside, and a secondary grate is provided at the secondary connection port. The volume of the secondary rainwater collection tank is larger than the volume of the primary rainwater collection tank and smaller than the volume of the tertiary rainwater collection tank. The cross-sectional area of ​​the secondary connection port is larger than the cross-sectional area of ​​the primary connection port and smaller than the cross-sectional area of ​​the tertiary open port. The primary rainwater collection tank and the secondary rainwater collection tank, as well as the secondary rainwater collection tank and the tertiary rainwater collection tank, are all connected by underground connecting pipes.

[0009] Further, the primary rainwater collection tank includes an interconnected primary sedimentation tank and a primary collection well, with the bottom of the primary sedimentation tank lower than the bottom of the primary collection well; a primary connecting port is located at the top of the primary sedimentation tank, and a primary observation port is provided at the top of the primary collection well, with a detachable primary viewing cover for the primary observation port; the secondary rainwater collection tank includes an interconnected secondary sedimentation tank and a secondary collection well, with the bottom of the secondary sedimentation tank lower than the bottom of the secondary collection well; a secondary connecting port is located at the top of the secondary sedimentation tank, and a secondary observation port is provided at the top of the secondary collection well, with a detachable secondary viewing cover for the secondary observation port; an underground connecting pipe connects the primary collection well and the secondary sedimentation tank; the tertiary rainwater collection tank includes an interconnected tertiary sedimentation tank and a tertiary collection tank, with the bottom of the tertiary sedimentation tank lower than the bottom of the tertiary collection tank; an underground connecting pipe connects the secondary collection well and the tertiary sedimentation tank.

[0010] Furthermore, the bottom of the primary water collection well, the bottom of the secondary water collection well, and the bottom of the tertiary water collection tank are all provided with expansion and permeability enhancement ports. An expansion and permeability enhancement cylinder is inserted into the expansion and permeability enhancement port. The top of the expansion and permeability enhancement cylinder is provided with an opening, and an electrically controlled valve is provided at the opening. The bottom end of the expansion and permeability enhancement cylinder passes through the expansion and permeability enhancement port to extend into the ground. The wall of the expansion and permeability enhancement cylinder is provided with seepage holes.

[0011] Furthermore, a seepage device is provided at the expansion and permeation inlet, the seepage device including a sleeve, a gasket, and a pulley; the gasket is connected to both ends of the sleeve, and the pulley is rotatably connected to the wall of the sleeve; the sleeve is installed inside the expansion and permeation inlet, the expansion and permeation inlet cylinder passes through the sleeve, and the expansion and permeation inlet cylinder abuts against the pulley; one gasket is located on the upper side of the edge of the expansion and permeation inlet, and the other gasket is located on the lower side of the edge of the expansion and permeation inlet.

[0012] Furthermore, both the primary and secondary connecting ports are equipped with trap baskets; the width of the trap baskets gradually decreases from top to bottom.

[0013] Furthermore, the underground connecting pipe is equipped with a filtration structure; the filtration structure includes a water filter cylinder, which includes a cylinder body, a cylinder cover, and a rotating shaft. Both ends of the cylinder body are connected to the cylinder cover, and both the cylinder body and the cylinder cover are provided with multiple openings. The end of the rotating shaft is rotatably connected to the cylinder cover, and a spirally arranged carbon component is connected to the rotating shaft.

[0014] Furthermore, the filter structure also includes a filter cover and a filter filling layer, wherein the filter cover is provided with a plurality of filter holes; the filter cover is fixed to the outlet end of the connecting pipe, and the filter filling layer is disposed between the filter cylinder and the filter cover.

[0015] Furthermore, along the length of the three-stage water collection pool, multiple filter gabion walls are spaced apart within the pool, with the length of the filter gabion walls being the same as the width of the pool. Each filter gabion wall includes a cage body, a planting trough, and a water supply pipe. The top of the cage body is connected to the walkway grate, and the planting trough is located on top of the cage body, filled with a hydroponics substrate containing plants. One end of the water supply pipe is connected to the planting trough, and the other end extends into the lower part of the cage body. A three-stage filtration structure is provided between the outer bottom of the planting trough and the bottom of the cage body.

[0016] Furthermore, the rainwater drainage and collection system utilizing the garden landscape also includes a sunken plaza, with the pedestrian grating installed at the bottom of the sunken plaza.

[0017] Furthermore, the rainwater drainage and collection system utilizing the garden landscape includes a diversion area, which is formed by a groove for setting on the ground surface. The two opposite sides of the groove form horizontal curbs, and the rainwater garden storage area is set in the diversion area.

[0018] It should be understood that both the foregoing general description and the following detailed description are for illustrative purposes and do not necessarily limit the scope of this disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of this disclosure. Furthermore, the specification and drawings serve to explain the principles of this disclosure. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a rainwater drainage and water collection system utilizing a garden landscape, according to an embodiment of the present invention.

[0021] Figure 2 for Figure 1 The diagram shows a partial structure of a rainwater drainage and collection system that utilizes garden landscape.

[0022] Figure 3 for Figure 1 The diagram shows the structure of a primary rainwater collection device in a rainwater drainage system utilizing garden landscape.

[0023] Figure 4 for Figure 1 The diagram shows the structure of a secondary rainwater collection device in a rainwater drainage system that utilizes garden landscape.

[0024] Figure 5 for Figure 1 The diagram shows a three-stage rainwater collection system in a rainwater drainage system utilizing garden landscape.

[0025] Figure 6 for Figure 1 The diagram shows the structure of the expansion and infiltration tube in a rainwater drainage and collection system that utilizes garden landscape.

[0026] Figure 7 for Figure 1 The diagram shows the structure of the infiltrator in a rainwater drainage and collection system that utilizes garden landscape.

[0027] Figure 8 for Figure 1 The diagram shows a schematic of the intercepting basket in a rainwater drainage and collection system that utilizes garden landscape.

[0028] Figure 9 for Figure 1 The diagram shows the structure of a filter cylinder in a rainwater drainage and collection system that utilizes garden landscape.

[0029] Figure 10 for Figure 9 A schematic diagram of the carbon rod in the filter cylinder shown;

[0030] Figure 11 for Figure 5 A schematic diagram of the filter gabion wall in the three-stage rainwater system shown;

[0031] Figure 12 for Figure 11 A partial structural schematic diagram of the gabion wall for water filtering is shown;

[0032] Figure 13 for Figure 1 The diagram shows the structure of an electrically controlled valve in the closed state of a rainwater drainage and collection system utilizing a garden landscape.

[0033] Figure 14 for Figure 13 The diagram shows the structure of the electrically controlled valve in the open state.

[0034] Icons: 100 - Permeable area; 200 - Green space; 300 - Rain garden storage area; 400 - Primary rainwater system; 500 - Secondary rainwater system; 600 - Tertiary rainwater system; 700 - Sunken plaza; 800 - Drainage area;

[0035] 401-Primary sedimentation tank; 402-Primary water collection well; 403-Primary grate; 404-Primary visible well cover; 405-Primary expansion and seepage inlet; 406-Primary expansion and seepage inlet cylinder; 407-Primary electrically controlled valve; 408-Primary seepage device; 409-Primary underground connecting pipe; 410-Primary intercepting basket; 420-Primary filter cylinder; 430-Primary filter cover; 440-Primary filter packing layer;

[0036] 501 - Secondary sedimentation tank; 502 - Secondary collection well; 503 - Secondary grate; 504 - Secondary visible well cover; 505 - Secondary expansion and seepage inlet; 506 - Secondary expansion and seepage inlet cylinder; 507 - Secondary electrically controlled valve; 508 - Secondary seepage device; 509 - Secondary underground connecting pipe; 510 - Secondary intercepting basket; 520 - Secondary filter cylinder; 530 - Secondary filter cover; 540 - Secondary filter packing layer;

[0037] 601-Three-stage sedimentation tank; 602-Three-stage water collection tank; 603-Walking grate; 604-Three-stage expansion and seepage inlet; 605-Three-stage expansion and seepage inlet cylinder; 606-Three-stage electrically controlled valve; 607-Three-stage seepage device; 608-Cage; 609-Planting trough; 610-Soilless cultivation substrate; 620-Plant; 630-Water supply and intake pipe; 640-Water inlet hole; 650-Three-stage filtration structure; 660-Connecting hole;

[0038] 11-Leakage hole; 12-Handle; 13-Valve gasket;

[0039] 21-Sleeve; 22-Washer; 23-Pulley;

[0040] 31-Perforated filter plate; 32-Support frame;

[0041] 41-Cylinder body; 42-Cylinder cover; 43-Shaft; 44-Carbon component.

[0042] 51-Upper rotary valve; 52-Lower fixed valve; 53-Rotating shaft; 54-Signal receiver. Detailed Implementation

[0043] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0044] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0045] 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.

[0046] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0049] It should be noted that the rainwater drainage and collection system utilizing garden landscapes described in this embodiment of the invention is applicable to, but not limited to, garden landscape sites, and can also be applied to other sites (e.g., commercial districts, residential communities, or factories).

[0050] like Figures 1 to 12 As shown, this embodiment of the invention provides a rainwater drainage and collection system utilizing a garden landscape, comprising a rain garden storage area 300, a primary rainwater collection tank, and a tertiary rainwater collection tank. The top of the primary rainwater collection tank has a primary connection opening for external communication, and a primary grate 403 is installed at the primary connection opening. The top of the secondary rainwater collection tank has a secondary connection opening for external communication, and a secondary grate 503 is installed at the secondary connection opening. The top of the tertiary rainwater collection tank has a tertiary open opening for penetrating the ground surface, and the tertiary open opening is covered with... There is a pedestrian grating 603; the primary rainwater collection tank is located within the rainwater garden storage area 300, and the primary connection opening is higher than the bottom of the rainwater garden storage area 300; the volume of the secondary rainwater collection tank is larger than that of the primary rainwater collection tank and smaller than that of the tertiary rainwater collection tank; the cross-sectional area of ​​the secondary connection opening is larger than that of the primary connection opening and smaller than that of the tertiary open opening; the primary rainwater collection tank and the secondary rainwater collection tank, as well as the secondary rainwater collection tank and the tertiary rainwater collection tank, are all connected by underground connecting pipes.

[0051] In this embodiment, when the rainfall is small, the rainwater can be stored in the rain garden storage area 300. When the rainfall is large, the water volume in the rain garden storage area 300 reaches a certain amount, and the rainwater overflows into the primary rainwater collection tank through the primary connection port. Runoff rainwater can also directly enter the secondary rainwater collection tank through the secondary connection port, and runoff rainwater can also directly enter the tertiary rainwater collection tank through the tertiary open port. When the water volume in the primary rainwater collection tank reaches a certain amount, the rainwater overflows into the underground connecting pipe between the primary and secondary rainwater collection tanks, and then flows into the secondary rainwater collection tank through the underground connecting pipe. When the water volume in the secondary rainwater collection tank reaches a certain amount, the rainwater overflows into the underground connecting pipe between the secondary and tertiary rainwater collection tanks, and then enters the tertiary rainwater collection tank. The primary grate 403 filters rainwater entering the primary rainwater collection tank, thereby intercepting large particulate pollutants (such as fallen leaves, branches, or large pieces of garbage); the secondary grate 503 filters rainwater entering the secondary rainwater collection tank, thereby intercepting large particulate pollutants (such as fallen leaves, branches, or large pieces of garbage); and the tertiary walkway grate 603 filters rainwater entering the tertiary rainwater collection tank, thereby intercepting large particulate pollutants (such as fallen leaves, branches, or large pieces of garbage). During periods of heavy rainfall, rainwater can flow into the rain garden storage area 300, the secondary rainwater collection pond, and the tertiary rainwater collection pond, respectively. This eliminates the need for a complex pipe network, enabling rapid drainage. The cross-sectional areas of the primary, secondary, and tertiary openings increase sequentially, ensuring smooth drainage during heavy rainfall. This allows surface runoff to be quickly and directly discharged into the secondary and tertiary rainwater collection ponds during extreme weather, improving the site's drainage capacity and reducing the risk of flooding. The rain garden storage area 300, the primary, secondary, and tertiary rainwater collection ponds all effectively collect rainwater, further reducing the risk of flooding. Therefore, the rainwater drainage and collection system provided in this embodiment achieves rapid drainage and provides excellent water collection capacity, thereby reducing the risk of flooding.

[0052] In addition, the rain garden storage area 300 is used as part of the water collection and drainage system, and the garden landscape is also used as part of the water collection and drainage system. While realizing the collection and drainage of rainwater within the site, it can also play a role in greening and improve the environment. When the rainwater drainage and collection system utilizing the garden landscape provided in this embodiment is applied to a garden landscape site, it can be integrated with the garden landscape site, making the entire site's structure and facilities aesthetically pleasing.

[0053] Of course, green areas can also be set up around the 300-meter rain garden storage area to further enhance the aesthetics of the rainwater collection and drainage system.

[0054] Taking garden landscape as an example, a 200-square-meter green space is set up within a 100-square-meter permeable area, and a 300-square-meter rain garden storage area is set up within the 200-square-meter green space. For example... Figures 1 to 5 As shown, based on the above embodiment, further, the primary rainwater collection tank includes a primary sedimentation tank 401 and a primary collection well 402 that are interconnected. The bottom of the primary sedimentation tank 401 is lower than the bottom of the primary collection well 402 (with the ground surface as a reference). A primary connection port is located at the top of the primary sedimentation tank 401, and a primary observation port is provided at the top of the primary collection well 402. The primary observation port is detachably connected to a primary viewing well cover 404 (the primary viewing well cover 404 is made of a transparent material, such as glass). The secondary rainwater collection tank includes a secondary sedimentation tank 501 and a secondary collection well 502 that are interconnected. The bottom of the secondary sedimentation tank 501 is lower than the bottom of the secondary collection well 502. The bottom of the primary sedimentation tank 501 is located at the bottom of the secondary sedimentation tank 501. The top of the secondary collection well 502 is equipped with a secondary observation port, which is detachably connected to a secondary viewing cover 504 (the secondary viewing cover 504 is made of a transparent material, such as glass). An underground connecting pipe connects the primary collection well 402 and the secondary sedimentation tank 501. The tertiary rainwater collection tank includes the interconnected tertiary sedimentation tank 601 and the tertiary collection tank 602. The bottom of the tertiary sedimentation tank 601 is lower than the bottom of the tertiary collection tank 602 (with reference to the ground surface). An underground connecting pipe connects the secondary collection well 502 and the tertiary sedimentation tank 601.

[0055] In this embodiment, during the process of rainwater entering the primary rainwater collection tank, it first enters the primary sedimentation tank 401, where silt and impurities are settled. In other words, the primary sedimentation tank 401 purifies the rainwater entering the primary rainwater collection tank, and the purified rainwater can be stored in the primary collection well 402. Similarly, during the process of rainwater entering the secondary rainwater collection tank, it first enters the secondary sedimentation tank 501, where silt and impurities are settled. In other words, the secondary sedimentation tank 501 purifies the rainwater entering the secondary rainwater collection tank, and the purified rainwater can be stored in the secondary collection well 502. Likewise, during the process of rainwater entering the tertiary rainwater collection tank, it first enters the tertiary sedimentation tank 601, where silt and impurities are settled. In other words, the tertiary sedimentation tank 601 purifies the rainwater entering the tertiary rainwater collection tank, and the purified rainwater can be stored in the tertiary collection tank 602. The rainwater from the primary collection well 402 can undergo further sedimentation after entering the secondary sedimentation tank 501, and the rainwater in the secondary collection well 502 can undergo further purification after entering the tertiary sedimentation tank 601. This part of the rainwater can achieve multi-stage sedimentation, which improves the purification effect.

[0056] In addition, the primary viewing manhole cover 404 allows observation of the primary rainwater collection tank. The primary viewing manhole cover 404 is detachably connected to the primary observation port, allowing for convenient maintenance of the facilities within the primary rainwater collection tank by removing it. Similarly, the secondary viewing manhole cover 504 allows observation of the secondary rainwater collection tank. The secondary viewing manhole cover 504 is detachably connected to the secondary observation port, allowing for convenient maintenance of the facilities within the secondary rainwater collection tank by removing it.

[0057] like Figures 2 to 5 As shown, based on the above embodiment, further, the bottom of the primary water collection well 402, the bottom of the secondary water collection well 502, and the bottom of the tertiary water collection pool 602 are all provided with expansion and infiltration inlets. Expansion and infiltration cylinders are inserted into the expansion and infiltration inlets. The top of the expansion and infiltration cylinders is provided with an opening, and an electrically controlled valve is provided at the opening. The electrically controlled valve controls the opening and closing of the opening. The bottom end of the expansion and infiltration cylinders passes through the expansion and infiltration inlets to extend into the ground. The walls of the expansion and infiltration cylinders are provided with seepage holes 11.

[0058] In this embodiment, the top of the expansion and infiltration cylinder is located above the expansion and infiltration inlet, and the lower part of the expansion and infiltration cylinder is buried underground. Installing the expansion and infiltration cylinder can increase the rainwater collection capacity of the corresponding collection pool. By controlling the opening and closing of the opening through an electrically controlled valve, expansion can be selected according to the specific rainfall amount, which is more conducive to coping with extreme rainstorms and further reduces the risk of urban flooding. The expansion and infiltration cylinder is equipped with seepage holes 11, which allow rainwater to replenish groundwater, achieving an ecological regulation and storage function.

[0059] Among them, electrically controlled valves can be electric valves or solenoid valves. Electrically controlled valves can communicate with terminal equipment (such as computers or central controllers), allowing operators to control the opening and closing of electric valves via the terminal equipment; alternatively, the terminal equipment can intelligently control the opening and closing of electrically controlled valves based on specific meteorological information. This can be achieved using conventional technical means.

[0060] For ease of description, the primary rainwater collection tank, the structure located at the primary rainwater collection tank, and the underground connecting pipes connecting the primary and secondary rainwater collection tanks can be collectively referred to as the primary rainwater system 400; the secondary rainwater collection tank, the structure located at the secondary rainwater collection tank, and the underground connecting pipes connecting the secondary and tertiary rainwater collection tanks can be collectively referred to as the secondary rainwater system 500; and the tertiary rainwater collection tank and the structure located at the tertiary rainwater collection tank can be collectively referred to as the tertiary rainwater system 600. That is, the primary rainwater system 400 includes a primary rainwater collection tank, a primary expansion and infiltration inlet 405, a primary expansion and infiltration cylinder 406, a primary underground connecting pipe 409, and a primary electrically controlled valve 407; the secondary rainwater system 500 includes a secondary rainwater collection tank, a secondary expansion and infiltration inlet 505, a secondary expansion and infiltration cylinder 506, a secondary underground connecting pipe 509, and a secondary electrically controlled valve 507; and the tertiary rainwater system 600 includes a tertiary rainwater collection tank, a tertiary expansion and infiltration inlet 604, a tertiary expansion and infiltration cylinder 605, and a tertiary electrically controlled valve 606.

[0061] The opening and closing of the primary electrically controlled valve 407, the secondary electrically controlled valve 507, and the tertiary electrically controlled valve 606 can be controlled according to the actual rainfall. For example, according to three rainfall intensity standards: heavy rain (50-99.9 mm of rainfall in 24 hours), torrential rain (100-249.9 mm of rainfall in 24 hours), and extremely heavy rain (over 250 mm of rainfall in 24 hours); when rainfall occurs between 50 mm and 99.9 mm in 24 hours, the electrically controlled valve opens, thereby opening the opening of the primary expansion and infiltration cylinder 406 (the secondary and tertiary electrically controlled valves 606 remain closed), allowing rainwater to enter the primary expansion and infiltration cylinder 406 and improving the storage capacity of the primary rainwater collection tank; when rainfall occurs between 100 mm and 249.9 mm in 24 hours... The secondary electrically controlled valve 507 is opened (the primary electrically controlled valve 407 remains open, and the tertiary electrically controlled valve 606 remains closed), thereby opening the opening of the secondary expansion and infiltration cylinder 506, allowing rainwater to enter and improving the storage capacity of the secondary rainwater collection tank. When 24-hour rainfall reaches 250 mm or more, the tertiary electrically controlled valve 606 is opened (both the primary and secondary electrically controlled valves 407 and 507 remain open), thereby opening the opening of the tertiary expansion and infiltration cylinder 605, allowing rainwater to enter and improving the storage capacity of the tertiary rainwater collection tank. The rainwater drainage and collection system utilizing a garden landscape provided by this embodiment of the invention can adjust the rainwater collection and storage capacity and can be tiered according to specific rainfall conditions, making it more effective in coping with severe weather.

[0062] The number of primary expansion and infiltration tubes 406, secondary expansion and infiltration tubes 506, and tertiary expansion and infiltration tubes 605 can be set according to specific circumstances, and can be one or more (e.g., two, three, or four). The number of primary expansion and infiltration tubes 406, secondary expansion and infiltration tubes 506, and tertiary expansion and infiltration tubes 605 can be increased sequentially to adapt to the volume of the corresponding collection tank. For example, the number of primary expansion and infiltration tubes 406 can be one, the number of secondary expansion and infiltration tubes can be two, and the number of tertiary expansion and infiltration tubes 605 can be six.

[0063] The number of primary underground connecting pipes 409 and secondary underground connecting pipes 509 can be one or more, depending on the specific circumstances. The number can also be determined based on the volume of the corresponding rainwater collection tank. For example, if the volume of the primary rainwater collection tank is smaller than that of the secondary rainwater collection tank, then there can be one primary underground connecting pipe 409 and two secondary underground connecting pipes 509, thus facilitating smoother rainwater flow.

[0064] It is understandable that the connection point between the primary underground connecting pipe 409 and the primary water collection well 402 is located above the primary water collection well 402, thereby enabling the primary water collection well 402 to have a set amount of water collection. When the water level reaches the primary underground connecting pipe 409, the water in the primary water collection well 402 flows into the primary underground connecting pipe 409. Similarly, the connection point between the secondary underground connecting pipe 509 and the secondary water collection well 502 is located above the secondary water collection well 502, thereby enabling the secondary water collection well to have a set amount of water collection. When the water level reaches the secondary underground connecting pipe 509, the water in the secondary water collection well 502 flows into the secondary underground connecting pipe 509.

[0065] Electrically controlled valves can be either electrically controlled or solenoid-controlled. The specific structure of an electrically controlled valve can be determined based on the selected valve type. For example, an electrically controlled valve might be a wirelessly controlled electric valve, such as... Figure 6 , Figure 13 and Figure 14As shown, the electrically controlled valve includes an upper rotary valve 51, a lower fixed valve 52, a rotating shaft 53, a motor, and a signal receiver 54. The upper rotary valve 51 and the lower fixed valve 52 are stacked along the axial direction of the rotating shaft 53. The upper rotary valve 51 includes multiple upper valve plates spaced apart along the circumference of the rotating shaft 53 and connected to the rotating shaft 53. The lower fixed valve 52 includes multiple lower valve plates spaced apart along the circumference of the rotating shaft 53. One end of the rotating shaft 53 passes through the lower fixed valve 52 and connects to the upper rotary valve 51. The motor is connected to the rotating shaft 53, and the signal receiver 54 is connected to the motor and provides communication. On the inner wall of the expansion and permeation cylinder at its opening, multiple valve gaskets 13 are spaced apart along the circumference of the expansion and permeation cylinder. The multiple lower valve plates are correspondingly snapped onto the valve gaskets 13, thereby fixing them relative to the expansion and permeation cylinder. After receiving a signal to open the electrically controlled valve, the signal receiver 54 controls the motor to operate. The motor drives the rotating shaft 53 to rotate, which in turn drives the upper rotating valve 51 to move. The upper valve plate rotates, thereby opening the gap between two adjacent lower valve plates, thus opening the electrically controlled valve. After receiving a signal to close the electrically controlled valve, the signal receiver 54 controls the motor to operate. The motor drives the rotating shaft 53 to rotate, which in turn drives the upper rotating valve 51 to move. The upper valve plate rotates, thereby blocking the gap between two adjacent lower valve plates, thus closing the electrically controlled valve.

[0066] like Figures 2 to 5 As shown, based on the above embodiment, a seepage device is further provided at the expansion and permeation inlet. The seepage device includes a sleeve 21, a gasket 22, and a pulley 23. Gaskets 22 are connected to both ends of the sleeve 21, and the pulley 23 is rotatably connected to the wall of the sleeve 21. The sleeve 21 is installed inside the expansion and permeation inlet, and the expansion and permeation cylinder passes through the sleeve 21, with the expansion and permeation cylinder abutting against the pulley 23. One gasket 22 is located on the upper side of the edge of the expansion and permeation inlet, and the other gasket 22 is located on the lower side of the edge of the expansion and permeation inlet. It can also be understood that the two gaskets 22 sandwich the edge of the expansion and permeation inlet in the middle.

[0067] In this embodiment, the management personnel need to periodically observe the rainwater infiltration effect of the expansion and infiltration tube. If the infiltration effect decreases, the expansion and infiltration tube can be pulled out from the expansion and infiltration port, the seepage hole 11 can be cleaned, and then the expansion and infiltration tube can be inserted back into the expansion and infiltration port. An infiltration enhancer is set at the expansion and infiltration port, and the expansion and infiltration tube is inserted into the sleeve 21. During the process of pulling out and inserting the expansion and infiltration tube, the pulley 23 slides on the side wall of the expansion and infiltration tube, thereby reducing the movement resistance of the expansion and infiltration tube, making the process of pulling out and inserting the expansion and infiltration tube easier and more convenient for the management personnel.

[0068] Multiple pulleys 23 can be spaced out on the sleeve 21 along the circumference of the sleeve 21.

[0069] Accordingly, the primary rainwater device 400 also includes a primary infiltrator 408, the secondary rainwater device 500 also includes a secondary infiltrator 508, and the tertiary rainwater device 600 also includes a tertiary infiltrator 607.

[0070] Furthermore, a handle 12 can be provided on the upper part of the expansion and permeation cylinder to facilitate the pulling out and insertion of the expansion and permeation cylinder.

[0071] like Figure 2 , Figure 3 , Figure 4 and 8 As shown, based on the above embodiment, a sludge trap is further provided at both the primary and secondary connection ports; the width of the sludge trap gradually decreases from top to bottom.

[0072] In this embodiment, the intercepting basket can further intercept pollutants in rainwater, and the width of the intercepting basket gradually decreases from top to bottom, that is, the side wall of the intercepting basket is set with an incline, so the cross-sectional area of ​​the top of the intercepting basket is larger than the cross-sectional area of ​​its bottom. Due to the effect of gravity flow of rainwater, the drainage flow speed is faster. Since the impurities filtered out of the water are mainly attached to the bottom of the intercepting basket, the cleaning area is smaller, and cleaning is more convenient and faster.

[0073] The cross-sectional shape of the sludge trap can be trapezoidal, or optionally, V-shaped, which makes it easier to clean. Specifically, the sludge trap includes a perforated filter plate 31 and a support frame 32.

[0074] Accordingly, the primary rainwater device 400 includes a sewage interception basket, and the secondary rainwater device 500 includes a secondary sewage interception basket 510.

[0075] like Figures 3 to 10 As shown, based on the above embodiment, a filter structure is further provided in the underground connecting pipe; the filter structure includes a water filter cylinder, which includes a cylinder body 41, a cylinder cover 42 and a rotating shaft 43. Both ends of the cylinder body 41 are connected to the cylinder cover 42. Both the cylinder body 41 and the cylinder cover 42 are provided with multiple openings. The end of the rotating shaft 43 is rotatably connected to the cylinder cover 42. A spirally arranged carbon component 44 is connected to the rotating shaft 43.

[0076] In this embodiment, after rainwater enters the underground connecting pipe, it enters the filter cylinder through the openings on the filter cylinder. The rainwater comes into contact with the carbon component 44, which can filter soluble pollutants in the water. The spirally arranged carbon component 44 rotates under the impetus of the rainwater flow. On the one hand, the spirally arranged carbon component 44 can fully contact the rainwater, making the filtration and purification effect of the carbon component 44 better. On the other hand, the spiral arrangement of the carbon component 44 can also push the rainwater downstream during the rotation of the carbon component 44, accelerating the water flow and thus improving the drainage capacity of the underground connecting pipe.

[0077] The structure of the helical carbon component 44 can be varied. For example, the carbon component 44 can be a helical blade wound around the rotating shaft 43; or, the carbon component 44 can include multiple carbon rods connected to the rotating shaft 43 in a helical structure. Multiple carbon components 44 can be spaced apart along the length of the rotating shaft 43.

[0078] Correspondingly, the primary rainwater device 400 also includes a primary filter cartridge 420, and the secondary rainwater device 500 also includes a secondary filter cartridge 520.

[0079] like Figures 3 to 10 As shown, based on the above embodiments, the filter structure further includes a filter cover and a filter filling layer. The filter cover has multiple filter holes. The filter cover is fixed to the outlet end of the connecting pipe, and the filter filling layer is disposed between the filter cylinder and the filter cover.

[0080] In this embodiment, the filter filling layer can further filter and adsorb pollutants in rainwater, resulting in better rainwater purification. The materials of the filter filling layer can be customized as needed; for example, the filter filling layer may consist of 50% ceramsite with a diameter of 15-25 mm and 50% crushed stone with a diameter of 20-25 mm.

[0081] Correspondingly, the primary rainwater device 400 also includes a primary filter cover 430 and a primary filter filling layer 440; the secondary rainwater device 500 also includes a secondary filter cover 530 and a secondary filter filling layer 540.

[0082] like Figure 2 , Figure 11 and Figure 12 As shown, based on the above embodiment, further, along the length direction of the three-stage water collection tank 602, multiple filter gabion walls are provided at intervals within the three-stage water collection tank 602, and the length direction of the filter gabion walls is the same as the width direction of the three-stage water collection tank 602; the filter gabion wall includes a cage body 608, a planting trough 609, and a water supply pipe; the top of the cage body 608 is connected to the walkway grate 603, the planting trough 609 is set on the top of the cage body 608, the planting trough 609 is filled with soilless cultivation substrate 610, and plants 620 are placed in the soilless cultivation substrate 610; one end of the water supply pipe is connected to the planting trough 609, and the other end extends into the lower part of the cage body 608; a three-stage filtration structure 650 is provided between the outer bottom of the planting trough 609 and the bottom of the cage body 608.

[0083] In this embodiment, the three-stage filtration structure 650 filters and purifies rainwater entering the three-stage collection tank 602. Through the transpiration of the plants 620 in the planting trough 609, water from the three-stage collection tank 602 is introduced into the soilless cultivation substrate 610 within the planting trough 609 via a water supply pipe. The top of the cage 608 is connected to the pedestrian grate 603, providing support and making walking on it more stable. The plants 620 in the planting trough 609 serve ecological and aesthetic functions, and the rainwater drainage and collection system utilizing a garden landscape provided in this embodiment offers a visually appealing aesthetic experience.

[0084] A connecting hole 660 can be provided at the bottom of the planting trough 609. One end of the water supply pipe is connected to the connecting hole 660, and the other end can extend to the bottom of the water collection tank. Multiple water inlet holes 640 are provided on the side wall of the water supply pipe 630.

[0085] The number of gabion walls can be set according to the situation, for example, three gabion walls. In the interval between two adjacent gabion walls, and in the interval between the gabion wall and the side wall of the three-stage collection tank 602 away from the three-stage sedimentation tank 601, there are three-stage expansion and infiltration inlets 604 and three-stage expansion and infiltration cylinders 605.

[0086] The three-stage filtration structure 650 can be filled with filter media, including 30% pebbles with a particle size of 50-100mm, 30% quartz sand with a particle size of 15-30mm, and 20% ceramsite slag with a particle size of 15-25mm. Geotextile can be laid inside the cage 608 to wrap the sides of the filter media. The hydroponic substrate 610 can include 33% perlite with a particle size of 3-5mm, 33% vermiculite with a particle size of 10-15mm, and 33% vermiculite with a particle size of 8-12mm, all accounting for 33% of the total weight of the hydroponic substrate 610. The hydroponic substrate 610 serves to retain water and fix the plants 620. Drought-tolerant landscape plants are preferred for the plants 620.

[0087] In some embodiments of the present invention, for surface runoff rainwater entering the primary rainwater device 400: after passing through the primary grate 403 and the primary intercepting basket 410, the rainwater enters the primary sedimentation tank 401, and then enters the primary collection well 402. When the water level reaches a certain height, the rainwater overflows into the primary underground connecting pipe 409. After being purified by the primary filter cylinder 420 and the primary filter filling layer 440, the rainwater enters the secondary sedimentation tank 501 through the filter holes on the filter cover. For surface runoff entering the secondary rainwater treatment device 500: After passing through the secondary grate 503 and the secondary intercepting basket 510, the rainwater directly enters the secondary sedimentation tank 501, mixes with the rainwater transported by the primary underground connecting pipe 409, and enters the secondary collection well 502. When the water level reaches a certain height, the rainwater overflows into the secondary underground connecting pipe 509. After being purified by the secondary filter cartridge 520 and the primary filter filling layer 440, the rainwater passes through the filter holes on the filter cover and enters the tertiary sedimentation tank 601. For surface runoff entering the tertiary rainwater treatment device 600: The rainwater passes through the walkway grate 603 and directly enters the tertiary sedimentation tank 601 and the tertiary collection tank 602, mixes with the rainwater transported by the secondary underground connecting pipe 509, and flows through the tertiary filtration structure 650. This multi-stage purification of some rainwater can be achieved, with good purification effect.

[0088] In some embodiments of the present invention, the rainwater drainage and collection system of the garden landscape includes a combined purification structure comprising a "V"-shaped intercepting basket, a rainwater inflow sedimentation tank, a filter barrel, a filter filling layer, and a filter gabion wall. This structure can remove large particulate pollutants (e.g., fallen leaves, dead branches, large pieces of garbage), small particulate pollutants (e.g., silt), and soluble pollutants (e.g., TP, TN). By employing a variety of composite and targeted purification structures, it is possible to conveniently, efficiently, and quickly remove pollutants from rainwater surface runoff.

[0089] like Figure 1 , Figure 11 and Figure 12 As shown, based on the above embodiments, the rainwater drainage and collection system utilizing the garden landscape further includes a sunken plaza 700 (that is, the bottom of the sunken plaza 700 is set below the ground surface, which can also be understood as setting a groove in the site, and the groove forms the sunken plaza 700). A pedestrian grate 603 is set at the bottom of the sunken plaza 700. Specifically, a three-level opening is set through the bottom of the sunken plaza 700, and the pedestrian grate 603 covers the three-level opening, forming at least a part of the bottom of the sunken plaza 700.

[0090] In this embodiment, a sunken plaza 700 is set up in the site. On the one hand, when the rainfall greatly exceeds the intensity of a torrential rain, that is, when the water volume exceeds the capacity of the three-stage water collection well, the sunken plaza 700 can serve as a temporary rainwater storage area, and the rainwater can directly flood the sunken plaza 700 to ensure the relative safety of other areas within the site. On the other hand, pedestrians can move around in the sunken plaza 700, walk on the pedestrian grid 603, observe the plants 620 in the planting trough 609, and observe the situation in the three-stage water collection pool 602.

[0091] In some embodiments of the present invention, the rainwater drainage and collection system utilizing the landscape includes a primary visible manhole cover 404, a secondary visible manhole cover 504, a sunken plaza 700, a pedestrian grate 603, and plants 620 within planting troughs 609. This enhances the visual appeal of the rainwater drainage and collection system within the landscape, increasing its demonstrative value and visitor participation. Visitors can clearly and intuitively observe the entire process of rainwater drainage, collection, utilization, and purification. Furthermore, the volume of each rainwater expansion and infiltration cylinder can be calculated, thus quantifying the amount of rainwater infiltration in the entire system. Therefore, the rainwater drainage and collection system utilizing the landscape has the advantages of being visually appealing, quantifiable, and participatory, fully leveraging its ecological and social benefits.

[0092] In some embodiments of the present invention, the rainwater drainage and collection system utilizing the garden landscape includes a rain garden storage area 300, a primary rainwater device 400, a secondary rainwater device 500, a tertiary rainwater device 600, and a sunken plaza 700, which greatly improves drainage and water collection capacity, thereby reducing the risk of waterlogging and improving the safety of the land.

[0093] like Figure 1 As shown, based on the above embodiments, the rainwater drainage and collection system of the garden landscape further includes a diversion area 800, which is formed by a groove for setting on the ground surface. The two opposite sides of the groove form a horizontal curb. The rainwater garden storage area 300 is set in the diversion area 800.

[0094] In this embodiment, a diversion area 800 is provided. During periods of light rainfall, rainwater can flow through the diversion area 800 into the rain garden storage area 300. When the rain garden storage area 300 is full, the rainwater overflows into the primary collection tank. This facilitates the priority flow of rainwater into the primary rainwater system 400 during light rain, reducing the need for the secondary and tertiary rainwater systems 500 and thus lowering maintenance costs. Green plants can be installed within the diversion area 800.

[0095] When encountering heavy rain or torrential rain, runoff rainwater enters the rain garden storage area 300 and the primary rainwater device 400 from the diversion area 800. At the same time, runoff rainwater enters the secondary rainwater device 500 and flows into the sunken plaza 700 and then into the tertiary rainwater device 600.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Different embodiments can be combined with each other. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention. Numerous specific details are set forth in the specification provided herein. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification. Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the present invention and form different embodiments.

Claims

1. A rainwater drainage catchment system utilizing a landscape feature, characterized by, include: Rain garden storage area (300), primary rainwater collection pond, secondary rainwater collection pond and tertiary rainwater collection pond; The top of the primary rainwater collection tank is provided with a primary connection port for connecting to the outside, and a primary grate (403) is provided at the primary connection port; the top of the secondary rainwater collection tank is provided with a secondary connection port for connecting to the outside, and a secondary grate (503) is provided at the secondary connection port; the top of the tertiary rainwater collection tank is provided with a tertiary open opening for penetrating the ground surface, and a pedestrian grate (603) is provided at the tertiary open opening. The primary rainwater collection tank is located within the rainwater garden storage area (300), and the primary connection opening is higher than the bottom of the rainwater garden storage area (300); the volume of the secondary rainwater collection tank is greater than the volume of the primary rainwater collection tank and smaller than the volume of the tertiary rainwater collection tank; the cross-sectional area of ​​the secondary connection opening is greater than the cross-sectional area of ​​the primary connection opening and smaller than the cross-sectional area of ​​the tertiary open opening; the primary rainwater collection tank and the secondary rainwater collection tank, as well as the secondary rainwater collection tank and the tertiary rainwater collection tank, are all connected by underground connecting pipes; The primary rainwater collection tank includes a primary sedimentation tank (401) and a primary collection well (402) that are interconnected. The bottom of the primary sedimentation tank (401) is lower than the bottom of the primary collection well (402). The primary connection port is located at the top of the primary sedimentation tank (401), and the top of the primary collection well (402) is provided with a primary observation port. The primary observation port is detachably connected to a primary visual manhole cover (404). The secondary rainwater collection tank includes a secondary sedimentation tank (501) and a secondary collection well (502) that are interconnected. The bottom of the secondary sedimentation tank (501) is lower than the bottom of the secondary collection well (502). The secondary connection port is located at the top of the secondary sedimentation tank (501), and the top of the secondary collection well (502) is provided with a secondary observation port. The secondary observation port is detachably connected to a secondary visual manhole cover (504). The underground connecting pipe connects the primary collection well (402) and the secondary sedimentation tank (501). The three-stage rainwater collection tank includes a three-stage sedimentation tank (601) and a three-stage water collection tank (602) that are interconnected. The bottom of the three-stage sedimentation tank (601) is lower than the bottom of the three-stage water collection tank (602). The underground connecting pipe connects the two-stage water collection well (502) and the three-stage sedimentation tank (601). The bottom of the primary water collection well (402), the bottom of the secondary water collection well (502), and the bottom of the tertiary water collection tank (602) are all provided with expansion and infiltration inlets. An expansion and infiltration cylinder is inserted into the expansion and infiltration inlet. The top of the expansion and infiltration cylinder is provided with an opening, and an electrically controlled valve is provided at the opening. The bottom end of the expansion and infiltration cylinder passes through the expansion and infiltration inlet to extend into the ground. The wall of the expansion and infiltration cylinder is provided with seepage holes (11). The expansion and permeation inlet is equipped with a seepage device, which includes a sleeve (21), a gasket (22), and a pulley (23). The gasket (22) is connected to both ends of the sleeve (21), and the pulley (23) is rotatably connected to the wall of the sleeve (21). The sleeve (21) is installed inside the expansion and permeation inlet, and the expansion and permeation cylinder passes through the sleeve (21) and abuts against the pulley (23). One gasket (22) is located on the upper side of the edge of the expansion and permeation inlet, and the other gasket (22) is located on the lower side of the edge of the expansion and permeation inlet. The electrically controlled valve is a wirelessly controlled electric valve, comprising an upper rotary valve (51), a lower fixed valve (52), a rotating shaft (53), a motor, and a signal receiver (54). The upper rotary valve (51) and the lower fixed valve (52) are stacked along the axial direction of the rotating shaft (53). The upper rotary valve (51) includes multiple upper valve plates spaced apart along the circumferential direction of the rotating shaft (53), and the upper valve plates are connected to the rotating shaft (53). The lower fixed valve (52) includes multiple upper valve plates spaced apart along the circumferential direction of the rotating shaft (53). Multiple lower valve plates are spaced apart in the circumferential direction of the rotating shaft (53). One end of the rotating shaft (53) passes through the lower fixed valve (52) and is connected to the upper rotating valve (51). The motor is connected to the rotating shaft (53). The signal receiver (54) is connected to the motor and has a communication connection. On the inner wall of the expansion and permeation cylinder, multiple valve gaskets (13) are spaced apart in the circumferential direction of the expansion and permeation cylinder. The multiple lower valve plates are snapped onto the valve gaskets (13) one by one and fixed relative to the expansion and permeation cylinder.

2. The rainwater drainage and collection system utilizing garden landscape as described in claim 1, characterized in that, Both the primary and secondary connecting ports are equipped with trap baskets; the width of the trap baskets gradually decreases from top to bottom.

3. The rainwater drainage and collection system utilizing garden landscape as described in claim 1, characterized in that, The underground connecting pipe is equipped with a filtration structure; the filtration structure includes a water filter cylinder, which includes a cylinder body (41), a cylinder cover (42) and a rotating shaft (43). Both ends of the cylinder body (41) are connected to the cylinder cover (42). Both the cylinder body (41) and the cylinder cover (42) are provided with multiple openings. The end of the rotating shaft (43) is rotatably connected to the cylinder cover (42). A spirally arranged carbon component (44) is connected to the rotating shaft (43).

4. The rainwater drainage and collection system utilizing garden landscape as described in claim 3, characterized in that, The filtration structure also includes a filter cover and a filter filling layer inside the underground connecting pipe. The filter cover has multiple filter holes. The filter cover is fixed to the outlet end of the connecting pipe, and the filter filling layer is disposed between the filter cylinder and the filter cover.

5. The rainwater drainage and collection system utilizing garden landscape as described in claim 1, characterized in that, Along the length of the three-stage water collection tank (602), a plurality of filter gabion walls are provided at intervals inside the three-stage water collection tank (602), and the length of the filter gabion walls is the same as the width of the three-stage water collection tank (602). The gabion wall includes a cage body (608), a planting trough (609), and a water supply pipe; the top of the cage body (608) is connected to the walkway grate (603), the planting trough (609) is located on the top of the cage body (608), the planting trough (609) is filled with a soilless cultivation substrate (610), and plants (620) are placed in the soilless cultivation substrate (610); one end of the water supply pipe is connected to the planting trough (609), and the other end extends into the lower part of the cage body (608); a three-stage filtration structure (650) is provided between the outer bottom of the planting trough (609) and the bottom of the cage body (608).

6. The rainwater drainage and collection system utilizing garden landscape according to any one of claims 1-5, characterized in that, The rainwater drainage and collection system utilizing the garden landscape also includes a sunken plaza (700), and the pedestrian grating (603) is installed at the bottom of the sunken plaza (700).

7. The rainwater drainage and collection system utilizing garden landscape according to any one of claims 1-5, characterized in that, The rainwater drainage and collection system utilizing the garden landscape includes a drainage area (800), which is formed by a groove for setting on the ground surface. The two opposite sides of the groove form a horizontal curb. The rainwater garden storage area (300) is set in the drainage area (800).

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