Planting ponds that automatically differentiate between initial and subsequent rainwater

Abstract

The present invention discloses a planting pond that automatically separates and processes initial and subsequent rainwater. The pond comprises a housing with a gridded steel grate on its top wall. The housing comprises a drainage chamber, an initial rainwater chamber, a subsequent rainwater chamber, and a planting chamber. A water inlet is provided on the left side wall of the housing, communicating with the bottom of the water reservoir. The inlet is connected to a water conduit, which communicates with the initial rainwater drainage structure. A mechanical opening control mechanism is provided at the inlet. When the water level in the initial rainwater chamber is low, the mechanical opening control mechanism fully opens the inlet. As the water level in the initial rainwater chamber rises, the mechanical opening control mechanism gradually closes the inlet. This patent design incorporates a technology for separating and processing initial and subsequent rainwater suitable for use in planting ponds. It shifts the technical approach for separating and processing initial and subsequent rainwater from an expensive electronic control approach with continuous electricity and electronic component maintenance costs to a cost-effective mechanical control approach. The present invention features rapid soil rehydration at the beginning and slow rehydration at the end, enabling the use of rainwater to replenish soil in the planting pond over a longer period of time.

Description

Technical Field

[0001] The present invention relates to the technical field of planting ponds, in particular to a technology for collecting and utilizing rainwater in planting ponds. Background Art

[0002] Planting pools are artificial structures used in urban greening and garden landscaping. They are used to grow plants and provide the basic space required for plant growth. They are widely used in road greening, squares, parks, commercial centers and other occasions.

[0003] The existing planting pools have a relatively simple use of rainwater. After the rainwater enters the planting pool, except for a part being absorbed by the soil in the planting pool, most of the rainwater directly seeps into the ground, replenishing groundwater resources and reducing surface runoff.

[0004] In recent years, people have gradually developed planting pools with water storage functions, but this type of planting pool cannot classify, process and utilize initial rainwater and subsequent rainwater.

[0005] Rainwater is usually divided into two stages: initial rainwater and subsequent rainwater. This division is mainly based on the characteristics of rainwater pollution.

[0006] The rainwater falling into the planting pond is less disturbed by surface runoff. At the beginning of the rainfall, the content of air pollutants carried by the rainwater is higher. This part of rainwater is called initial rainwater.

[0007] As the rainfall continues, most of the pollutants in the air are carried away by the initial rain, so the subsequent rain forms relatively clean subsequent rain.

[0008] For planting ponds that utilize rainwater, the initial rainwater flow is more likely to accumulate pollutants or grow moss on the walls of the container. If this is not cleaned for a long time, it will affect the normal function of the rainwater system. Therefore, it is necessary to separate and treat the initial and subsequent rainwater in the planting pond.

[0009] The existing planting pools do not have the structure and function to classify and treat initial rainwater and subsequent rainwater.

[0010] In other water treatment areas, such as rainwater collection and treatment systems for chemical plants, technologies exist for separating primary and secondary rainwater. These technologies typically use sensors to monitor pollutant concentrations. When pollutant concentrations exceed a set threshold, the control system automatically classifies the rainwater as primary rainwater and directs it to the primary rainwater treatment structure. Otherwise, when pollutant concentrations do not exceed the set threshold, the control system automatically classifies the rainwater as secondary rainwater and directs it to the primary rainwater treatment structure.

[0011] When treating initial rainwater, existing technologies focus on reducing pollutant concentrations (removing pollutants) rather than cleaning contaminants or moss that has accumulated on the surface of the treatment container. Existing planter tanks use gravel or soil to filter rainwater, trapping debris at the top of the tank and failing to separate initial and subsequent rainwater.

[0012] The research and development ideas and innovations of the present invention are:

[0013] 1. Compared with subsequent rainwater, initial rainwater contains more nitrogen and phosphorus substances, which is beneficial to plant growth. Therefore, initial rainwater should not be simply discarded. A structure for classifying, treating and utilizing initial rainwater and subsequent rainwater should be designed in the planting pool to meet the needs of classifying, treating and utilizing initial rainwater and subsequent rainwater.

[0014] Second, the technology for classifying and processing the initial rainwater and subsequent rainwater is changed from the traditional electric control route to the mechanical control route of the present invention.

[0015] Existing technologies for separating and processing primary and secondary rainwater rely on sensors, electronic control devices, and circuitry. This approach is unsuitable for planter ponds. The reasons for this are: 1. They are expensive and don't match the inherent value of planter ponds (greening facilities, not the production value of factories meeting emission targets). 2. Planter pond environments differ from factory water treatment environments. Factory water treatment environments are rarely visited (except by staff), with no frequent traffic, no vibration, sound, or light, no influence on plant growth, and no impact from watering and cleaning operations by landscaping and sanitation workers. Therefore, electronic components in factory water treatment environments offer a more stable operating environment and are less susceptible to damage over long periods of operation. Planter ponds, on the other hand, present these unfavorable conditions, making electronic components and connecting wiring more susceptible to damage, especially in the long term. 3. Factory water treatment environments have sufficient power supply capacity and a budget for electricity costs. Planter ponds, which are used for greening purposes, lack power supply infrastructure. More importantly, there is no budget for installing a power supply system for planter ponds, nor is there a sustainable electricity cost budget for their long-term operation.

[0016] Therefore, the existing technical route that relies on sensors and electronic control (referred to as the electronic control route) is not suitable for use in planting pools. Summary of the Invention

[0017] The purpose of the present invention is to provide a planting pond that automatically distinguishes and processes initial rainwater and subsequent rainwater, proposes a mechanical control route, and realizes the classified treatment and utilization of initial rainwater and subsequent rainwater through a mechanical structure.

[0018] To achieve the above-mentioned purpose, the planting pond for automatically distinguishing and treating initial rainwater and subsequent rainwater of the present invention comprises a box body, the top wall of which is a grid-shaped steel grate for water inlet;

[0019] An inverted L-shaped planting cavity is provided in the middle and lower part of the box body. The planting cavity contains soil and is used for the root growth of plants. The planting cavity has a high top wall, a low top wall, a left wall, a right wall and a middle side wall. A plant tube is connected between the high top wall and the top wall of the box body. The upper end of the plant tube opens to the upper surface of the top wall of the box body and the lower end opens to the lower surface of the high top wall.

[0020] The lower top wall of the planting cavity is a first water seepage plate, the left side of the first water seepage plate is connected to the left side wall of the box body, and the right side of the first water seepage plate is connected to the middle side wall of the planting cavity;

[0021] An initial rainwater chamber bottom plate is provided above the first water seepage plate. The initial rainwater chamber bottom plate is connected to the middle side wall of the planting cavity to the right, and is connected to the left side wall of the box body to the left;

[0022] The initial rainwater chamber bottom plate, the first seepage plate, the middle side wall of the planting pool and the box body form the subsequent rainwater chamber;

[0023] The left portion of the initial rainwater chamber bottom plate is recessed downward, forming a water storage tank at the bottom of the initial rainwater chamber. The high top wall of the planting chamber extends leftward to the water storage tank and is used to quickly converge water falling through the top wall of the box into the water storage tank. The initial rainwater chamber bottom plate outside the water storage tank is the first filter plate. The first filter plate is used to filter the water above it and then flow downward into the subsequent rainwater chamber.

[0024] The initial rainwater chamber is formed by the bottom plate of the initial rainwater chamber, the top wall of the box body, the leftward extension of the high top wall, the left side wall of the box body and the middle side wall of the planting cavity;

[0025] A water inlet chamber is formed between the high top wall and the top wall of the box body;

[0026] A water inlet is provided on the left wall of the box body, which is connected to the bottom of the water storage tank. The water inlet is connected to a water guide pipe, which is connected to the initial rainwater drainage structure. The initial rainwater drainage structure is used to introduce initial rainwater into the planting cavity.

[0027] A mechanical opening control mechanism is provided at the water outlet. When the water level in the initial rainwater chamber is low, the mechanical opening control mechanism controls the water outlet to be fully open. When the water level in the initial rainwater chamber rises, the mechanical opening control mechanism controls the water outlet to be gradually closed.

[0028] The mechanical control mechanism for the opening degree includes vertical slots arranged on the left side wall of the box on the front and rear sides of the water outlet. The notches of the front and rear vertical slots are arranged opposite to each other. A sliding plate is inserted between the front and rear vertical slots. A winding wheel is provided on the left side wall of the box above the vertical slots through a wheel frame. A suspension line is wound on the winding wheel. One end of the suspension line is connected downward to the sliding plate and is used to suspend the sliding plate. The other end of the suspension line is connected downward to a hollow gravity ball. The overall density of the gravity ball is less than the density of water. The static friction between the sliding plate and the two vertical slots is N1, the weight of the sliding plate is N2, the weight of the gravity ball is greater than N1+N2, and N2>N1.

[0029] The initial rainwater drainage structure is as follows:

[0030] The left side wall of the housing is connected outwardly to a primary rainwater drainage chamber. The primary rainwater drainage chamber has a left side wall with an inlet connected to the water conduit. A rotating shaft is provided within the primary rainwater drainage chamber, mounted on the left side wall of the housing via a bearing. Multiple blades are evenly connected to the rotating shaft along the circumference. Strip-shaped cleaning brushes are provided on the radially outer end, left end face, and right end face of each blade. The cleaning brushes are slidably pressed against the radially inner surface and left side wall of the primary rainwater drainage chamber. Annular ribs serving as reinforcements are connected between the blades. The water conduit extends into the inlet on the left side wall of the primary rainwater drainage chamber, and its water discharge is tangentially directed toward the blades. The primary rainwater drainage chamber downwardly communicates with a sewage storage tank. A second filter plate is provided on the lower surface of the sewage storage tank. The second filter plate is downwardly connected to a water permeation box, which communicates with the bottom of the planting cavity via a second water seepage plate.

[0031] The average pore size of the first water permeable plate is smaller than the average pore size of the second water permeable plate.

[0032] The present invention has the following advantages:

[0033] One of the research and development ideas and innovations of the present invention is that the technology for classifying and applying initial rainwater and subsequent rainwater is designed in the planting pond.

[0034] The second R&D idea and innovation of the present invention is that the applicant has changed the technical route for classifying, treating and utilizing initial rainwater and subsequent rainwater, from an electronic control route with high setup costs and continuous electricity costs and electronic component maintenance costs during use to a low-cost mechanical control route.

[0035] The third innovation of this invention lies in the fact that the soil in existing planting pits quickly absorbs large amounts of rainwater during rainfall. This not only causes excess water to dissipate through the soil, but also shortens the time the soil remains moist after clearing. This invention, on the other hand, ensures that initial rainwater enters the soil within the planting cavity quickly, while subsequent rainwater enters more slowly, reducing water loss through the soil. (Soil loses water because it is connected to the surrounding soil; if the planting soil is disconnected, excessive water can easily damage plant roots.)

[0036] The fourth innovation of this invention lies in the fact that initial rainwater, which contains high levels of pollutants, is prone to dirt and moss growth on the surfaces of its storage containers. In this invention, initial rainwater flowing from the water pipe strikes the blades in a nearly tangential direction, causing the rotating shaft to rotate continuously under the impact of the water flow. During this rotation, cleaning brushes at the radial ends and left and right ends of each blade clean the surface of the initial rainwater drainage chamber, achieving self-cleaning and preventing dirt and moss growth.

[0037] The present invention utilizes a mechanical opening control mechanism to ensure that, at the beginning of a rainstorm and when the water level in the initial rainwater chamber is low, rainwater in the water storage tank can quickly flow through the water inlet and the water conduit into the initial rainwater drainage structure and supply water to the planting cavity, rapidly replenishing moisture in the soil within the planting cavity. After a period of rain, when a large amount of rainwater flows into the planting pool and the water level in the initial rainwater chamber rises, the opening control mechanism gradually closes the water inlet to prevent excessive water from being supplied to the planting cavity within a short period of time. The water that quickly enters the initial rainwater drainage structure in the early stage is the initial rainwater. After a large amount of water flows, the ground has been cleaned by the initial rainwater, and the relatively clean rainwater becomes the subsequent rainwater. At this time, the water inlet is very small or closed, and accumulates in the initial rainwater chamber. It then flows through the first filter plate into the subsequent rainwater chamber for storage. This relatively clean water slowly seeps into the planting cavity through the first water seepage plate over a long period of time after the rainfall, thereby providing water to the plants in the planting cavity for a longer period of time, reducing the number of manual waterings after rain and saving corresponding water resources, electricity consumption, and labor costs.

[0038] The opening degree mechanical control mechanism is a purely mechanical structure. It does not require electronic components such as sensors and electricity to automatically divert the initial rainwater and subsequent rainwater for processing. The initial rainwater is quickly filtered and enters the planting cavity, thereby quickly replenishing water to the soil in the planting cavity, and the subsequent rainwater accumulates and slowly seeps into the planting cavity, thereby continuously replenishing water to the soil in the planting cavity for a long time.

[0039] The horizontal cross-section of the water storage tank is smaller than the horizontal cross-section of the initial rainwater chamber above it. Therefore, the water flowing into the water storage tank can raise the water level faster, thereby slowing down the speed of the initial rainwater entering the planting cavity through the initial rainwater treatment structure, forming a water inflow speed that is fast at first and then slow in the planting cavity, which is beneficial to quickly replenishing the planting cavity with water and avoiding excessive water inflow into the planting cavity in a short period of time.

[0040] In light rain, the water level in the water tank may not rise at all, indicating that the rainfall is very small and likely insufficient to clear dirt from the ground, and therefore all the water is primary rainwater. The failure to raise the water level in the water tank also means that the water inlet remains open. The present invention can automatically distinguish and treat the rainwater in this situation as primary rainwater without the need for an electronic control device.

[0041] Although the present invention does not have a pollutant concentration sensor and is not as good as the traditional electronic control route in identifying pollutants, it is more suitable for use in planting pools (see the R&D ideas in the background technology section).

[0042] The mechanical control mechanism for the opening degree in the present invention does not require an electronic control structure and has a simple structure, so it is not prone to malfunction and is suitable for long-term unmanned automatic operation. It can automatically use rainwater as initial rainwater (entering the initial rainwater drop structure through the water outlet and quickly entering the planting cavity) or subsequent rainwater (passing through the first filter plate into the subsequent rainwater chamber for storage and slowly infiltrating into the planting cavity) according to the amount of rainwater, and is very suitable for use in planting pools.

[0043] N2>N1 is to ensure that the sliding plate can fall down under the action of gravity, and the weight of the gravity ball is greater than N1+N2 to ensure that the gravity ball can suspend the sliding plate through the suspension line when there is no water, thereby opening the water outlet.

[0044] The average pore size of the first seepage plate is smaller than the average pore size of the second seepage plate, so that the initial rainwater seeps into the soil of the planting pool faster than the subsequent rainwater seeps into the soil of the planting pool, forming a soil water replenishment characteristic that is fast at the beginning and slow at the end, avoiding the phenomenon that a large amount of rainwater quickly enters the soil of the planting pool when it rains, and can keep the soil of the planting pool moist for a longer time after the rain, thereby improving the rainwater utilization efficiency of rainwater irrigation of green plants, reducing the number of manual watering times, and reducing the water resources, electricity and labor costs consumed by manual watering.

[0045] In the existing technology, the speed at which rainwater enters the soil of the planting pond before and after a rainfall cannot be adjusted, and a large portion of the rainwater inevitably replenishes groundwater. The present invention realizes the design concept of quickly replenishing the soil with initial rainwater and slowly replenishing the soil with subsequent rainwater over a longer period of time. This allows rainwater to provide more of the needs for plant growth, thereby more rationally utilizing water resources and having great application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural schematic diagram of the present invention;

[0047] Figure 2 It is a left-side structural schematic diagram of the present invention;

[0048] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0049] Figure 4 It is a schematic diagram of the top structure of the present invention;

[0050] Figure 5 It is a schematic diagram of the three-dimensional structure of the present invention;

[0051] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0052] Figure 7 It is a schematic diagram of the structure of the blade.

[0053] The drawings of the present invention are schematic structural diagrams, which are intended to clearly illustrate the structure and are not drawn to scale. DETAILED DESCRIPTION

[0054] by Figure 1 The left direction in is the left direction in the present invention.

[0055] like Figures 1 to 7 As shown, the planting pond for automatically distinguishing and treating initial rainwater and subsequent rainwater of the present invention comprises a box body, and the top wall 1 of the box body is a grid-shaped steel grate for water inlet;

[0056] An inverted L-shaped (i.e., symmetrical about a vertical line) planting cavity 2 is provided in the lower middle portion of the box. Soil is contained in the planting cavity 2 and serves as a base for plant root growth. The planting cavity 2 comprises a high top wall 3, a low top wall 4, a left side wall, a right side wall, and a middle side wall 6. A plant tube 30 is connected between the high top wall 3 and the box top wall 1. The upper end of the plant tube 30 opens to the upper surface of the box top wall 1 and the lower end opens to the lower surface of the high top wall 3. The plant tube 30 is used to allow the main trunk of the plant to extend upward from the planting cavity 2 and grow above the ground. The left and right walls of the planting cavity 2 are part of the left and right walls 5 and 7 of the box. The high top wall 3 is lower on the left and higher on the right, with a certain slope, which facilitates the rapid convergence of rainwater to the left.

[0057] The lower top wall 4 of the planting cavity 2 is a first water seepage plate, the left side of which is connected to the left side wall 5 of the box body, and the right side of which is connected to the middle side wall 6 of the planting cavity 2;

[0058] An initial rainwater chamber bottom plate 12 is provided above the first water seepage plate (i.e., the low top wall 4). The initial rainwater chamber bottom plate 12 is connected to the middle side wall 6 of the planting cavity 2 to the right, and to the left side wall of the box body to the left.

[0059] The initial rainwater chamber bottom plate 12, the first water seepage plate (i.e., the low top wall 4), the middle side wall 6 of the planting pool, and the box body form the subsequent rainwater chamber 8;

[0060] The left portion of the initial rainwater chamber floor 12 is recessed downward, forming a water trough 9 at the bottom of the initial rainwater chamber (water trough 9 is part of the initial rainwater chamber 10). The high top wall 3 of the planting chamber 2 extends leftward to the water trough 9 and is used to quickly converge water falling through the top wall 1 (steel grate) of the box body into the water trough 9. The initial rainwater chamber floor 12 outside the water trough 9 is a first filter plate 11. The first filter plate 11 is used to filter the water above it and then flow downward into the subsequent rainwater chamber 8.

[0061] In the present invention, the front and rear sides of the planting cavity 2 are connected to the surrounding soil, so that the plants can absorb and utilize the moisture in the surrounding soil. Except for the planting cavity 2, the initial rainwater chamber 10 and the subsequent rainwater chamber 8 are not connected to the surrounding soil.

[0062] The initial rainwater chamber bottom plate 12, the box top wall 1, the leftward extension of the high top wall 3, the box left side wall 5 and the middle side wall 6 of the planting cavity 2 form the initial rainwater chamber 10;

[0063] A water inlet chamber 13 is formed between the high top wall 3 (and the portion thereof extending to the left) and the top wall 1 of the box body;

[0064] A water inlet 14 is provided on the left side wall 5 of the box body, which is connected to the bottom of the water storage tank 9. The left end of the water inlet 14 is closed and connected to a water pipe 15. The water pipe 15 is connected to the initial rainwater drainage structure, which is used to introduce initial rainwater into the planting cavity 2.

[0065] The water outlet 14 is provided with an opening degree mechanical control mechanism. When the water level in the initial rainwater chamber 10 is low, the opening degree mechanical control mechanism controls the water outlet 14 to be fully open. When the water level in the initial rainwater chamber 10 rises, the opening degree mechanical control mechanism controls the water outlet 14 to be gradually closed.

[0066] The present invention uses a mechanical opening control mechanism to ensure that at the initial stage of rain and when the water level in the initial rainwater chamber 10 is low, the rainwater in the water storage tank 9 can quickly enter the initial rainwater drainage structure through the water port 14 and the water pipe 15 and supply water to the planting cavity 2, thereby quickly replenishing moisture to the soil in the planting cavity 2; after a period of rain, when a large amount of rainwater flows into the planting pool and the water level in the initial rainwater chamber 10 rises, the mechanical opening control mechanism controls the water port 14 to gradually close, thereby preventing excessive water from being supplied to the planting cavity 2 in a short period of time. The water that quickly enters the initial rainwater drainage structure in the early stage is the initial rainwater. After a period of rainfall, as the rainfall increases, the pollutants and debris carried by the rainwater decrease, and it is relatively clean, thus becoming the subsequent rainwater. At this time, the water outlet 14 is very small or has been closed, so it accumulates in the initial rainwater chamber 10 and enters the subsequent rainwater chamber 8 through the first filter plate 11 for storage. The stored relatively clean water slowly seeps into the planting cavity 2 through the first seepage plate (i.e., the low top wall 4) for a long period of time after the rainfall, so that it can supply water to the plants in the planting cavity 2 for a long time, reducing the number of manual watering after rain, and saving corresponding water resources, electricity consumption and labor costs.

[0067] The opening degree mechanical control mechanism is a purely mechanical structure. It does not require electronic components such as sensors and electricity to automatically divert the initial rainwater and subsequent rainwater for processing, so that the initial rainwater is quickly filtered and enters the planting cavity 2, thereby quickly replenishing water to the soil of the planting cavity 2, and the subsequent rainwater is accumulated and slowly seeps into the planting cavity 2, thereby continuously replenishing water to the soil of the planting cavity 2 for a long time.

[0068] The horizontal cross-section of the water storage tank 9 is smaller than the horizontal cross-section of the initial rainwater chamber 10 above it. Therefore, the water flowing into the water storage tank 9 can raise the water level faster, thereby slowing down the speed of the initial rainwater entering the planting cavity 2 through the initial rainwater treatment structure, forming a water inflow speed that is first fast and then slow in the planting cavity 2, which is beneficial for rapid water replenishment of the planting cavity 2 and avoids excessive water inflow into the planting cavity 2 in a short period of time.

[0069] In light rain, the water level in the water tank 9 may not rise at all, which means that the rainfall is very small and may not be enough to clear the dirt on the ground, so all the water is primary rainwater. The failure of the water level in the water tank 9 to rise also means that the water inlet 14 is always open. The present invention can automatically distinguish and treat the rainwater in this situation as primary rainwater without the need for an electronic control device.

[0070] Although the present invention does not have a pollutant concentration sensor and is not as good as the traditional electronic control route in identifying pollutants, it is more suitable for use in planting pools (see the R&D ideas in the background technology section).

[0071] The mechanical control mechanism for the opening degree includes vertical slots 16 provided on the left side wall 5 of the housing, front and rear of the water inlet 14. The notches of the two vertical slots 16 are arranged opposite each other, and a sliding plate 17 is inserted between the two vertical slots 16. A winding wheel 18 is provided on the left side wall 5 of the housing above the vertical slots 16 via a wheel frame. A suspension wire 19 is wound around the winding wheel 18. One end of the suspension wire 19 is downwardly connected to the sliding plate 17 and is used to suspend the sliding plate 17. The other end of the suspension wire 19 is downwardly connected to a hollow gravity ball 20, the overall density of which is less than that of water. The static friction between the sliding plate 17 and the two vertical slots 16 is N1, the weight of the sliding plate 17 is N2, and the weight of the gravity ball 20 is greater than N1 + N2, where N2>N1. The wheel frame is conventional technology and is not shown.

[0072] When the water tank 9 is empty, the gravity ball 20 falls to the bottom of the water tank 9 under the action of gravity, lifting the sliding plate 17 upward and away from the water port 14, so that the water port 14 is in a fully open state. As the water level in the water tank 9 rises, the gravity ball 20 floats with the rising water level, and the corresponding sliding plate 17 gradually falls, and the opening degree of the water port 14 gradually decreases until the water port 14 is completely closed. At this time, all the additional rainwater is stored as subsequent rainwater and slowly seeps into the planting cavity 2.

[0073] The mechanical control mechanism for the opening degree in the present invention does not require an electronic control structure and has a simple structure, so it is not prone to malfunction and is suitable for long-term unmanned automatic operation. It can automatically use rainwater as initial rainwater (entering the initial rainwater drop structure through the water outlet 14 and quickly entering the planting cavity 2) or subsequent rainwater (passing through the first filter plate 11 to enter the subsequent rainwater chamber 8 for storage and slowly infiltrating into the planting cavity 2) according to the amount of rainwater, and is very suitable for use in planting pools.

[0074] N2>N1 is to ensure that the sliding plate 17 can fall downward under the action of gravity, and the weight of the gravity ball 20 is greater than N1+N2 to ensure that the gravity ball 20 can suspend the sliding plate 17 through the suspension line 19 when there is no water, thereby opening the water outlet 14.

[0075] The initial rainwater drainage structure is as follows:

[0076] The left side wall 5 of the box body is connected to the initial rainwater drainage chamber 21.

[0077] The initial rainwater downflow chamber 21 has a left side wall, and the left side wall of the initial rainwater downflow chamber 21 has an inlet connected to the water guide pipe 15; a rotating shaft 23 is provided in the initial rainwater downflow chamber 21, and the rotating shaft 23 is installed on the left side wall 5 of the box body through a bearing; a plurality of blades 24 are evenly connected to the rotating shaft 23 along the circumference, and the radial outer end and left and right end faces of each blade 24 are respectively provided with a strip-shaped cleaning brush 25, and the cleaning brush 25 is slidably pressed against the radial inner surface and the left side wall of the initial rainwater downflow chamber 21. When the blade 24 rotates, the cleaning brush 25 is used to clean the inner surface of the initial rainwater downflow chamber 21 and the left side wall of the initial rainwater downflow chamber 21; an annular rib 22 serving as a reinforcing rib is connected between each blade 24. Aqueduct 15 extends into an inlet on the left side wall of initial rainwater drainage chamber 21, discharging water in a nearly tangential direction toward blades 24. Initial rainwater drainage chamber 21 communicates downward with a sewage tank 26. A second filter plate 27 is provided on the lower surface of sewage tank 26. This second filter plate 27 is downwardly connected to a water permeation tank 28, which communicates with the bottom of planting chamber 2 via a second water permeation plate 29. The initial rainwater drainage chamber has a generally circular vertical cross-section, and its lower portion communicates with sewage tank 26.

[0078] The initial rainwater flowing out of the water pipe 15 hits the blades 24 in the tangential direction, causing the rotating shaft to rotate continuously under the impact of the water flow. During the rotation process, the cleaning brushes 25 at the radial ends and the left and right ends of each blade 24 clean the surface of the initial rainwater drainage chamber 21 (including the circumferential inner surface and the inner surfaces of the left and right side walls) to prevent dirt from adhering to or moss from growing.

[0079] The average pore size of the first water seepage plate (i.e., the lower top wall 4) is smaller than the average pore size of the second water seepage plate 29. In practice, it is preferred that the water seepage rate of the second water seepage plate 29 be one fifth to one tenth of the water seepage rate of the first water seepage plate (i.e., the lower top wall 4).

[0080] The average pore size of the first seepage plate (i.e., the low top wall 4) is smaller than the average pore size of the second seepage plate 29, so that the initial rainwater seeps into the soil of the planting pool faster than the subsequent rainwater seeps into the soil of the planting pool, avoiding the phenomenon that a large amount of rainwater quickly enters the soil of the planting pool when it rains. It can keep the soil of the planting pool moist for a longer time after the rain, improve the rainwater utilization efficiency of rainwater irrigation of green plants, reduce the number of manual irrigation times, and reduce the water resources, electricity and labor costs consumed by manual irrigation.

[0081] In the existing technology, the speed at which rainwater enters the soil of the planting pond before and after a rainfall cannot be adjusted, and a large portion of the rainwater inevitably replenishes groundwater. The present invention realizes the design concept of quickly replenishing the soil with initial rainwater and slowly replenishing the soil with subsequent rainwater over a longer period of time. This allows rainwater to provide more of the needs for plant growth, thereby more rationally utilizing water resources and having great application value.

[0082] When in use, the top wall 1 of the box body is flush with the ground, and the rainwater falling through the top wall 1 of the box body (steel grate) quickly flows along the high top wall 3 and its leftward extending part to converge into the water storage tank 9; when the water level in the water storage tank 9 is low, it means that the rainfall is not large, and the rainwater may contain more dirt. The gravity ball 20 is located at the bottom of the water storage tank 9, and the sliding plate 17 is higher than the water outlet 14; at this time, the initial rainwater quickly flows into the initial rainwater drop chamber 21 through the water outlet 14 and the water pipe 15, and impacts the blades 24 in the tangential direction, so that the rotating shaft 23 rotates continuously under the impact of the water flow. During the rotation process, the cleaning brushes 25 at the ends of each blade 24 clean the surface of the initial rainwater drop chamber 21 to prevent dirt from adhering or moss from growing. When dirt is swept to the bottom of the initial rainwater drop chamber 21, it enters the trough 26. The accumulated debris forms another natural filtration layer outside the second filter plate 27. After passing through the trough 26 and the second filter plate 27, the rainwater enters the permeable tank 28 and then enters the soil of the planting cavity 2 through the second seepage plate 29. Because the average pore size of the second seepage plate 29 is larger than that of the first seepage plate (i.e., the lower top wall 4), initial rainwater can enter the planting cavity 2 relatively quickly, while subsequent rainwater penetrates more slowly, achieving a design principle of "fast at first, slow later, extending the time for post-rainwater recharge." The trough 26 has a large capacity. Since rainwater entering the planting pool only carries pollutants from the air and not from the ground, it can be cleaned at long intervals, such as once every one or two years for multiple planting pools in the region.

[0083] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A planting pond for automatically distinguishing between initial rainwater and subsequent rainwater, including a housing, characterized by: The top wall of the box is a grid-shaped steel grate for water intake; An inverted L-shaped planting cavity is provided in the middle and lower part of the box body. The planting cavity contains soil and is used for the root growth of plants. The planting cavity has a high top wall, a low top wall, a left wall, a right wall and a middle side wall. A plant tube is connected between the high top wall and the top wall of the box body. The upper end of the plant tube opens to the upper surface of the top wall of the box body and the lower end opens to the lower surface of the high top wall. The lower top wall of the planting cavity is a first water seepage plate, the left side of the first water seepage plate is connected to the left side wall of the box body, and the right side of the first water seepage plate is connected to the middle side wall of the planting cavity; An initial rainwater chamber bottom plate is provided above the first water seepage plate. The initial rainwater chamber bottom plate is connected to the middle side wall of the planting cavity to the right, and is connected to the left side wall of the box body to the left; The initial rainwater chamber bottom plate, the first seepage plate, the middle side wall of the planting pool and the box body form the subsequent rainwater chamber; The left portion of the initial rainwater chamber bottom plate is recessed downward, forming a water storage tank at the bottom of the initial rainwater chamber. The high top wall of the planting chamber extends leftward to the water storage tank and is used to quickly converge water falling through the top wall of the box into the water storage tank. The initial rainwater chamber bottom plate outside the water storage tank is the first filter plate. The first filter plate is used to filter the water above it and then flow downward into the subsequent rainwater chamber. The initial rainwater chamber is formed by the bottom plate of the initial rainwater chamber, the top wall of the box body, the leftward extension of the high top wall, the left side wall of the box body and the middle side wall of the planting cavity; A water inlet chamber is formed between the high top wall and the top wall of the box body; A water inlet is provided on the left wall of the box body, which is connected to the bottom of the water storage tank. The water inlet is connected to a water guide pipe, which is connected to the initial rainwater drainage structure. The initial rainwater drainage structure is used to introduce initial rainwater into the planting cavity. The water outlet is equipped with an opening degree mechanical control mechanism. When the water level in the initial rainwater chamber is low, the opening degree mechanical control mechanism controls the water outlet to be fully opened. When the water level in the initial rainwater chamber rises, the opening degree mechanical control mechanism controls the water outlet to be gradually closed. The mechanical control mechanism for the opening degree includes vertical slots provided on the left side wall of the box body on both sides of the water outlet. The notches of the front and rear vertical slots are arranged opposite each other. A sliding plate is inserted between the front and rear vertical slots. A winding wheel is provided on the left side wall of the box body above the vertical slots through a wheel frame. A suspension line is wound around the winding wheel. One end of the suspension line is downwardly connected to the sliding plate and is used to suspend the sliding plate. The other end of the suspension line is downwardly connected to a hollow gravity ball. The overall density of the gravity ball is less than the density of water. The static friction between the sliding plate and the two vertical slots is N1. The weight of the sliding plate is N2. The weight of the gravity ball is greater than N1 + N2, and N2>N1. The initial rainwater drainage structure is as follows: The left side wall of the box body is connected to the initial rainwater downflow chamber outward, and the initial rainwater downflow chamber has a left side wall, and the left side wall of the initial rainwater downflow chamber has an inlet communicated with the water guide pipe; a rotating shaft is provided in the initial rainwater downflow chamber, and the rotating shaft is installed on the left side wall of the box body through a bearing; a plurality of blades are evenly connected to the rotating shaft along the circumference, and the radial outer end portion and the left end face and the right end face of each blade are respectively provided with a strip-shaped cleaning brush, and the cleaning brush is slidably pressed against the radial inner surface and the left side wall of the initial rainwater downflow chamber, and an annular rib serving as a reinforcing rib is connected between each blade; the water guide pipe extends into the inlet on the left side wall of the initial rainwater downflow chamber and its water outlet direction is tangentially toward the blades; the initial rainwater downflow chamber is downwardly communicated with the sewage storage tank, and a second filter plate is provided at the lower surface of the sewage storage tank, and the second filter plate is downwardly connected to a water permeable box, and the water permeable box is communicated with the bottom of the planting cavity through a second water seepage plate.

2. The planting pond for automatically distinguishing and processing initial rainwater and subsequent rainwater according to claim 1, characterized in that: The average pore size of the first water permeable plate is smaller than the average pore size of the second water permeable plate.

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