Prefabricated ecological regulating and storing tree pool and regulating and storing method

Abstract

A prefabricated ecological water storage tree pit and its storage method are disclosed, relating to the field of water storage tanks. The prefabricated ecological water storage tree pit includes a water storage tank, a planting pool detachably attached to the top of the water storage tank, and at least one intercepting and energy-dissipating pool detachably connected to the side of the planting pool. The bottom of the water storage tank is connected to the municipal water supply network via a drainage pipe. The planting pool contains a planting soil layer, a sand cushion layer, and a graded gravel layer arranged sequentially from top to bottom. The bottom of the planting pool has an outlet connected to the water storage tank and a first pressure valve device, which is used to open and close the outlet when the water level in the planting pool is higher or lower than a preset water level. The top of the intercepting and energy-dissipating pool is equipped with a rainwater grate, and the side wall of the intercepting and energy-dissipating pool has an overflow outlet connected to the planting pool. The prefabricated ecological water storage tree pit and its storage method provided in this application can collect and regulate rainwater, avoiding soil compaction, root rot from soaking, and soil erosion caused by rainwater runoff. It also has the advantages of convenient assembly, disassembly, and maintenance.

Description

Technical Field

[0001] This application relates to the field of water storage tanks, and more specifically, to a prefabricated ecological water storage tree tank and a water storage method. Background Technology

[0002] Sponge cities are a commonly used stormwater management technology in China. They combine natural environmental measures with artificial methods, prioritizing ecological considerations, to maximize the accumulation, infiltration, and purification of rainwater in urban areas while ensuring urban drainage and flood control safety, thereby promoting rainwater resource utilization and ecological environmental protection. Common greening projects often employ rain gardens or sunken green spaces, which are simplistic and do not consider utilizing landscape features such as tree pits.

[0003] Traditional landscape tree pits have simple structures and relatively limited construction methods, mainly sunken, ground-level, and suspended types. When surface runoff is high in areas such as plazas and green belts, the water flow directly erodes the soil in the tree pits. The soil in traditional tree pits is prone to compaction, which leads to a decrease in soil porosity. This is not conducive to rainwater storage and infiltration, resulting in problems such as waterlogging, poor vegetation growth, and difficult and frequent maintenance. Moreover, the surface is mostly exposed soil, which is susceptible to wind erosion, causing dust and affecting air quality. Summary of the Invention

[0004] The purpose of this application is to provide a prefabricated ecological water storage tree pit and water storage method, which can collect and store rainwater, avoid soil compaction, root rot of planted plants, and soil and water loss caused by rainwater erosion, and has the advantages of convenient assembly, disassembly and maintenance.

[0005] This application is implemented as follows:

[0006] This application provides a prefabricated ecological regulating tree pit, which includes a water storage tank, a planting pool whose bottom is detachably snapped onto the top of the water storage tank, and at least one intercepting and energy dissipating pool detachably connected to the side of the planting pool. The bottom of the water storage tank is connected to the municipal pipe network through a drainage pipe. The planting pool is provided with a planting soil layer, a sand cushion layer and a graded crushed stone layer arranged sequentially from top to bottom. The bottom of the planting pool is provided with an outlet connected to the water storage tank and a first pressure valve device. The first pressure valve device is used to open and close the outlet when the water level in the planting pool is higher or lower than a preset water level. The top of the intercepting and energy dissipating pool is provided with a rainwater grate, and the side wall of the intercepting and energy dissipating pool is provided with an overflow outlet connected to the planting pool.

[0007] In some alternative implementations, a second pressure valve device is provided at the bottom of the water storage tank, which is used to open or close the drain pipe when the water level in the water storage tank is higher or lower than a preset water level.

[0008] In some alternative implementations, the bottom of the intercepting and energy-dissipating tank is provided with a drain pipe connected to the municipal pipe network and a third pressure valve device, which is used to open and close the drain pipe when the water level in the intercepting and energy-dissipating tank is higher or lower than a preset water level.

[0009] In some alternative implementations, the sidewall of the planting pool is provided with at least one connection port, and each intercepting and energy dissipating pool is slidably inserted into a connection port, with both sides of each intercepting and energy dissipating pool connected to both sides of the connection port by a tenon and mortise mechanism.

[0010] In some alternative implementations, the top of the water storage tank, planting pond, and sewage interception and energy dissipation pond is provided with multiple connecting slots for connecting lifting rings.

[0011] In some optional implementations, the intercepting and energy-dissipating tank is equipped with a water level sensor for detecting the water level.

[0012] In some alternative implementations, the top wall of the intercepting and energy-dissipating tank is provided with multiple water channels, the upper inner wall of the intercepting and energy-dissipating tank is connected to a cross slope plate, the top of the cross slope plate is covered with a pebble filter layer, and the two ends of the rain grate are respectively connected to the cross slope plate and the inner wall of the intercepting and energy-dissipating tank.

[0013] In some alternative implementations, the reservoir is equipped with multiple capillary ropes, the tops of which extend through the planting pool, the graded crushed stone layer, and the sand cushion layer into the planting soil layer.

[0014] In some alternative implementations, a layer of dry bark is laid on top of the planting soil layer.

[0015] This application also provides a method for regulating water storage using a prefabricated ecological water storage tree pit, which utilizes the aforementioned prefabricated ecological water storage tree pit and includes the following steps:

[0016] The intercepting and energy-dissipating pond and the planting pond respectively receive and store rainwater;

[0017] When the amount of rainwater received by the intercepting and energy-dissipating pond reaches the preset amount, the rainwater is allowed to flow into the planting pond through the overflow outlet.

[0018] When the rainwater stored in the planting pond reaches the preset amount, the first pressure valve device opens the outlet to allow the rainwater to flow into the municipal pipe network through the storage pond.

[0019] The beneficial effects of this application are as follows: The prefabricated ecological water storage tree pit provided by this application includes a water storage tank, a planting pool whose bottom is detachably snapped onto the top of the water storage tank, and at least one intercepting and energy dissipating pool detachably connected to the side of the planting pool. The bottom of the water storage tank is connected to the municipal pipe network through a drainage pipe. The planting pool is provided with a planting soil layer, a sand cushion layer, and a graded crushed stone layer arranged sequentially from top to bottom. The bottom of the planting pool is provided with an outlet connected to the water storage tank and a first pressure valve device. The first pressure valve device is used to open and close the outlet when the water level in the planting pool is higher or lower than a preset water level. The top of the intercepting and energy dissipating pool is provided with a rainwater grate, and the side wall of the intercepting and energy dissipating pool is provided with an overflow outlet connected to the planting pool. The prefabricated ecological water storage tree pit and water storage method provided by this application can collect and store rainwater, avoiding soil compaction, root rot caused by soaking of plant plants, and soil erosion caused by rainwater scouring. It also has the advantages of convenient assembly, disassembly, and maintenance. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A top view of the prefabricated ecological water storage tree pool provided in the embodiments of this application;

[0022] Figure 2 A first-view cross-sectional structural schematic diagram of the prefabricated ecological water storage tree pool provided in the embodiments of this application;

[0023] Figure 3 A cross-sectional structural schematic diagram from a second perspective of the prefabricated ecological water storage tree pool provided in the embodiments of this application;

[0024] Figure 4 A schematic diagram of the connection structure of the lifting ring in the connecting groove in the prefabricated ecological water storage tree pool provided in this application embodiment;

[0025] Figure 5 This is a schematic diagram of the structure of the first pressure valve device, the second pressure valve device, and the third pressure valve device in the prefabricated ecological regulating tree pool provided in the embodiments of this application.

[0026] In the diagram: 100, water storage tank; 110, drainage pipe; 120, second pressure valve device; 130, capillary rope; 140, positioning block; 200, planting bed; 201, permeable geotextile layer; 210, planting soil layer; 220, sand cushion layer; 230, graded crushed stone layer; 240, water outlet; 250, first pressure valve device; 260, connection port; 270, dry bark layer; 280, chute; 290, positioning groove; 300. Sewage interception and energy dissipation tank; 310. Rainwater grate; 320. Overflow outlet; 330. Drain pipe; 340. Third pressure valve device; 350. Water level sensor; 360. Flow channel; 370. Cross slope plate; 380. Pebble filter layer; 390. Protrusion; 400. Municipal pipe network; 410. Lifting ring; 420. Connecting groove; 430. Piston chamber; 440. Piston; 450. Spring; 500. Tree. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] 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.

[0032] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The features and performance of the prefabricated ecological water storage tree pit and water storage method of this application will be further described in detail below with reference to the embodiments.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this application embodiment provides a prefabricated ecological regulating tree pool, which includes a water storage pool 100, a planting pool 200 whose bottom is detachably snapped to the top of the water storage pool 100, and two intercepting and energy dissipating pools 300 that are detachably connected to both sides of the planting pool 200.

[0036] The water storage tank 100 is connected to the municipal pipe network 400 through a drain pipe 110 at its bottom. A second pressure valve device 120 is provided at the bottom of the water storage tank 100. The second pressure valve device 120 is used to open and close the drain pipe 110 when the water level in the water storage tank 100 is higher or lower than the preset water level. The top outer wall of the water storage tank 100 has a protrusion forming an annular positioning block 140.

[0037] The bottom outer wall of the planting pool 200 is recessed to form an annular positioning groove 290 for engaging the positioning block 140. The planting pool 200 is provided with a dry bark layer 270, a planting soil layer 210, a sand cushion layer 220 and a graded crushed stone layer 230 arranged from top to bottom. The bottom of the planting pool 200 is provided with an outlet 240 connected to the water storage pool 100 and a first pressure valve device 250. The first pressure valve device 250 is used to open and close the outlet 240 when the water level in the planting pool 200 is higher or lower than the preset water level. The two side walls of the planting pool 200 are respectively provided with a connection port 260. Each connection port 260 is provided with a sliding groove 280 extending along the height direction on both sides. The inner wall of the planting pool 200 is covered with a layer of permeable geotextile 201. The planting soil layer 210 is used for planting trees 500.

[0038] The top of the intercepting and energy-dissipating pool 300 is equipped with a rainwater grate 310. The side wall of the intercepting and energy-dissipating pool 300 is equipped with two overflow outlets 320 that connect to the planting pool 200. The upper inner wall of the intercepting and energy-dissipating pool 300 is connected to a cross slope plate 370. A pebble filter layer 380 is laid on top of the cross slope plate 370. The two ends of the rainwater grate 310 are respectively connected to the cross slope plate 370 and the inner wall of the intercepting and energy-dissipating pool 300. The bottom of the intercepting and energy-dissipating pool 300 is equipped with a drain pipe 330 that connects to the municipal pipe network 400 and a third pressure valve device 340. The third pressure valve device 340 is used to open and close the drain pipe 330 when the water level in the intercepting and energy-dissipating pool 300 is higher or lower than the preset water level. The intercepting and energy-dissipating tank 300 is equipped with a water level sensor 350 for detecting water level. The top wall of the intercepting and energy-dissipating tank 300 is provided with 10 spaced water channels 360. Each intercepting and energy-dissipating tank 300 is slidably inserted into a connection port 260. Each intercepting and energy-dissipating tank 300 has protrusions 390 on both sides that are slidably connected to the sliding grooves 280 on both sides of the connection port 260.

[0039] The water storage tank 100 is equipped with spaced-apart capillary ropes 130, the top of each capillary rope 130 extending through the planting pond 200, the graded crushed stone layer 230, and the sand cushion layer 220 into the planting soil layer 210. The tops of the water storage tank 100, the planting pond 200, and the sewage interception and energy dissipation tank 300 are respectively equipped with spaced-apart connecting grooves 420 for connecting lifting rings 410.

[0040] In this embodiment, the first pressure valve device 250, the second pressure valve device 120, and the third pressure valve device 340 are all composed of a piston 440 and a spring 450 connected to one end of the piston 440. The bottom of the planting pool 200, the water storage pool 100, and the sewage interception and energy dissipation pool 300 respectively forms a piston cavity 430 that communicates with the water outlet 240, the drain pipe 110, and the drain pipe 330. The pistons 440 of the first pressure valve device 250, the second pressure valve device 120, and the third pressure valve device 340 are respectively movably disposed in the corresponding piston cavities 430. The other end of the spring 450 of the first pressure valve device 250, the second pressure valve device 120, and the third pressure valve device 340 is respectively connected to the inner wall of the planting pool 200, the water storage pool 100, and the sewage interception and energy dissipation pool 300.

[0041] The installation method of the prefabricated ecological water storage tree pit provided in this application embodiment is as follows: Lifting rings 410 are installed on the connecting grooves 420 at the top of the water storage tank 100, planting pond 200, and intercepting and dissipating energy pond 300, respectively. The water storage tank 100 is lifted with a crane and placed in the excavated foundation pit. The lifting rings 410 at the top of the water storage tank 100 are removed. The planting pond 200 is lifted with a crane and placed on top of the installed water storage tank 100, so that the positioning groove 290 formed by the depression at the bottom of the planting pond 200 engages with the positioning block 140 protruding at the top of the water storage tank 100, thus securing the planting pond 200 and the water storage tank 100. The lifting rings 410 at the top of the planting pond 200 are removed. The intercepting and dissipating energy pond 300 is lifted with a crane and placed on the side of the installed planting pond 200, so that the protrusions 390 on both sides of the intercepting and dissipating energy pond 300 are slidably disposed at the connecting port 26 on one side of the planting pond 200. Within the chutes 280 on both sides, the intercepting and energy-dissipating pool 300 and the planting pool 200 are positioned and connected. The lifting ring 410 on the top of the intercepting and energy-dissipating pool 300 is removed, and the rainwater grate 310 is installed on the top of the cross slope 370 of the intercepting and energy-dissipating pool 300. A layer of pebbles is laid on the cross slope 370 of the intercepting and energy-dissipating pool 300 to form a pebble filter layer 380 that acts as a sedimentation layer. A permeable geotextile layer 201 is laid on the inner wall of the planting pool 200. The capillary rope 130 is passed through the bottom of the planting pool 200 and extended into the water storage pool 100. Then, the graded crushed stone layer 230, the sand cushion layer 220, and the planting soil layer 210 are laid in the planting pool 200 from bottom to top. The top of the capillary rope 130 passes through the graded crushed stone layer 230 and the sand cushion layer 220 and extends into the planting soil layer 210. After the trees 500 are planted in the planting soil layer 210, the dry bark layer 270 is laid on the top surface of the planting soil layer 210.

[0042] This application embodiment also provides a method for regulating water storage using a prefabricated ecological water storage tree pit, which is carried out using the above-mentioned prefabricated ecological water storage tree pit and includes the following steps:

[0043] During rainfall, rainwater enters the planting pond 200 and passes through the dry bark layer 270, planting soil layer 210, sand cushion layer 220, and graded crushed stone layer 230 before accumulating in the planting pond 200. At the same time, rainwater enters the intercepting and energy dissipation pond 300 through the drainage channel 360 and rainwater grate 310. When the water level in the intercepting and energy dissipation pond 300 gradually rises above the overflow outlet 320, it overflows into the planting pond 200. However, at this time, the overall water level in the planting pond 200 and the intercepting and energy dissipation pond 300 is low, and the first pressure valve device 250, the second pressure valve device 120, and the third pressure valve device 340 are all closed, and the planting pond 200 plays the main role in water storage.

[0044] As rainfall increases, the water level in the planting pond 200 rises continuously. When the water level in the planting pond 200 is higher than the sand cushion layer 220, the water pressure pushes the piston 440 of the first pressure valve device 250 to move and compress the corresponding spring 450 to connect the outlet 240, so that the rainwater in the planting pond 200 gradually flows into the water storage tank 100 through the outlet 240 for storage. At this time, the second pressure valve device 120 and the third pressure valve device 340 are both closed.

[0045] When the rainfall increases further, when the water level in the reservoir 100 reaches the preset height, the water pressure pushes the piston 440 of the second pressure valve device 120 to move and compress the corresponding spring 450 to connect the drain pipe 110, so that the rainwater in the reservoir 100 gradually flows into the municipal pipe network 400 through the drain pipe 110, ensuring that the water level in the ecological regulation tree pool is not higher than the plant roots in the planting soil layer 210.

[0046] As rainfall increases further, the water level continues to rise. When the water level in the planting pond 200 is higher than the overflow outlet 320, the water level in the intercepting and energy dissipating pond 300 is higher than the preset water level. The water pressure pushes the piston 440 of the third pressure valve device 340 to move and compress the corresponding spring 450 to connect the drain pipe 330. The rainwater in the intercepting and energy dissipating pond 300 flows directly into the municipal pipe network 400 from the drain pipe 330 and is discharged away. At the same time, the water level sensor 350 installed in the intercepting and energy dissipating pond 300 can detect the high water level in the intercepting and energy dissipating pond 300 and issue an early warning, which is convenient for operators to handle.

[0047] When there is no rain for a long period of time, the water in the reservoir 100 will rise from the capillary rope 130 through capillary action into the planting soil layer 210 to irrigate the root system of the trees 500, ensuring that the collected rainwater can be reused.

[0048] The prefabricated ecological storage tree pit and storage method provided in this application embodiment can use a multi-stage pressure valve device to perform multi-stage storage and drainage treatment of rainwater, and allow rainwater to overflow into the planting soil layer 210 in the planting pit 200 after passing through the intercepting and energy dissipation pond 300. This avoids dust or soil erosion, soil compaction, root rot of planted plants caused by frequent rainwater erosion of the surface covering soil, and soil erosion caused by rainwater erosion, improves the irrigation efficiency of rainwater, and has the advantages of convenient assembly, disassembly and maintenance.

[0049] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A fabricated ecological regulation and storage tree pool, characterized in that, It includes a water storage tank, a planting pool detachably attached to the top of the water storage tank, and at least one intercepting and energy-dissipating pool detachably connected to the side of the planting pool. The bottom of the water storage tank is connected to the municipal pipe network via a drainage pipe. The planting pool contains a planting soil layer, a sand cushion layer, and a graded crushed stone layer arranged sequentially from top to bottom. The bottom of the planting pool is equipped with an outlet connected to the water storage tank and a first pressure valve device. The first pressure valve device is used to open and close the outlet when the water level in the planting pool is higher or lower than a preset water level. The top of the intercepting and energy-dissipating pool is equipped with a rainwater grate. The side wall of the intercepting and energy-dissipating tank is provided with an overflow port connected to the planting pond. The bottom of the water storage tank is provided with a second pressure valve device, which is used to open and close the drain pipe when the water level in the water storage tank is higher or lower than a preset water level. The bottom of the intercepting and energy-dissipating tank is provided with a drain pipe connected to the municipal pipe network and a third pressure valve device, which is used to open and close the drain pipe when the water level in the intercepting and energy-dissipating tank is higher or lower than a preset water level. The first pressure valve device, the second pressure valve device, and the third pressure valve device are all composed of a piston and a spring connected to one end of the piston.

2. The assembled ecological regulating and storing tree pool according to claim 1, characterized in that, The side wall of the planting pool is provided with at least one connection port, and each of the sewage interception and energy dissipation pools is slidably inserted into one of the connection ports. Both sides of each sewage interception and energy dissipation pool are connected to both sides of the connection port through a tenon and mortise mechanism.

3. The prefabricated ecological water storage tree pit according to claim 2, characterized in that, The top of the water storage tank, the planting pond, and the sewage interception and energy dissipation pond are each provided with multiple connecting grooves for connecting lifting rings.

4. The prefabricated ecological water storage tree pit according to claim 1, characterized in that, The intercepting and energy-dissipating tank is equipped with a water level sensor for detecting the water level.

5. The prefabricated ecological water storage tree pond according to claim 1, characterized in that, The top wall of the intercepting and energy-dissipating tank is provided with multiple water flow channels. The upper inner wall of the intercepting and energy-dissipating tank is connected to a cross slope plate. A pebble filter layer is laid on the top of the cross slope plate. The two ends of the rainwater grate are respectively connected to the cross slope plate and the inner wall of the intercepting and energy-dissipating tank.

6. The prefabricated ecological water storage tree pit according to claim 1, characterized in that, The water storage tank is equipped with multiple capillary ropes, the tops of which penetrate the planting pool, the graded crushed stone layer, and the sand cushion layer, extending into the planting soil layer.

7. The prefabricated ecological water storage tree pond according to claim 1, characterized in that, The top surface of the planting soil layer is covered with a layer of dry bark.

8. A method for regulating water storage in a prefabricated ecological water storage tree pit, characterized in that, It is carried out using the prefabricated ecological water storage tree pool as described in any one of claims 1 to 7, and includes the following steps: The intercepting and energy-dissipating pond and the planting pond respectively receive and store rainwater; During rainfall, rainwater enters the planting pond and passes through the dry bark layer, planting soil layer, sand cushion layer, and graded crushed stone layer in sequence before accumulating in the planting pond. At the same time, rainwater enters the interception and energy dissipation pond through the drainage channel and rainwater grate. When the water level in the interception and energy dissipation pond gradually rises above the overflow outlet, it overflows into the planting pond, and the first pressure valve device, the second pressure valve device, and the third pressure valve device are all closed. As rainfall increases, the water level in the planting pond rises continuously. When the water level in the planting pond is higher than the sand cushion layer, the water pressure pushes the piston of the first pressure valve device to move and compress the corresponding spring to connect the outlet, so that the rainwater in the planting pond gradually flows into the storage tank through the outlet for storage. At this time, the second pressure valve device and the third pressure valve device are both closed. When the rainfall increases further, the water level in the reservoir reaches the preset height. The water pressure pushes the piston of the second pressure valve device to move and compress the corresponding spring to connect the drainage pipe, so that the rainwater in the reservoir gradually flows into the municipal pipe network through the drainage pipe. As rainfall increases further, the water level continues to rise. When the water level in the planting pond is higher than the overflow outlet, the water level in the intercepting and energy dissipation pond is higher than the preset water level. The water pressure pushes the piston of the third pressure valve device to move and compress the corresponding spring to connect the drain pipe. The rainwater in the intercepting and energy dissipation pond flows directly from the drain pipe into the municipal pipe network and is discharged away.

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