An unpowered soil aeration system for a bioretention facility and a method of controlling the same

Abstract

This invention provides a non-powered soil aeration system for bioretention facilities. The system includes a water storage module and an aeration module, which are interconnected and disposed within the soil layer. The water storage module is connected to the soil layer to receive rainwater and provide aeration. A drain outlet that can be selectively opened and closed is provided on one side of the aeration module. The drain outlet allows rainwater to drain from the aeration module and allows outside air to enter both the aeration module and the water storage module. A lifting support unit and a gate control unit are also provided. The lifting support unit selectively provides support to the gate control unit based on changes in the liquid level within the aeration module, and the gate control unit controls the opening and closing of the drain outlet based on changes in the liquid level within the aeration module. By modularly combining the water storage module and the aeration module, only a single or a small number of aeration modules are required to achieve uniform aeration under the soil of the regional green space facility, reducing costs.

Description

Technical Field

[0001] This invention relates to the technical field of soil aeration systems, specifically to a non-powered soil aeration system for bioretention facilities and its control method. Background Technology

[0002] In existing bioretention facilities, the soil is highly sealed, making it difficult for outside air to enter the soil. As a result, long-term water accumulation in the bioretention facility fills the soil pores with water, causing the water inside the soil to squeeze out the air space, resulting in the expulsion of oxygen from the soil and soil compaction.

[0003] Since plant roots in the soil need oxygen for respiration, the inability of outside air to enter the soil of bioretention facilities will also result in insufficient oxygen for plant roots to respire, reducing plant growth efficiency and thus affecting the landscape and ecological benefits of bioretention facilities.

[0004] The inability of outside air to enter the soil in bioretention facilities can accelerate the formation of an anaerobic environment in the soil, leading to the production of anaerobic byproducts (such as harmful or odorous gases like hydrogen sulfide and methane). At the same time, since oxygen is a key condition for nitrifying bacteria to convert ammonia nitrogen into nitrate, the reduction of air in the soil will also weaken nitrification and reduce the soil's nitrogen removal capacity. In addition, anaerobic conditions can increase the possibility of metal ions (such as iron and manganese) in the soil being reduced and released into water bodies, thus causing secondary pollution.

[0005] Existing patent application number CN2018100091649 discloses a device for soil aeration, which oxygenates the soil by introducing oxygen-containing air into the aeration pipe. However, this solution has the following defects and shortcomings:

[0006] 1) The aeration pipe is a single aeration pipe with a small radiation area. Therefore, multiple aeration pipes need to be buried to achieve the oxygenation effect of a large area of ​​soil. However, the burial operation of multiple aeration pipes is quite complicated, which makes this method a huge workload and cannot achieve uniform aeration of the soil.

[0007] 2) Existing rain gardens and green spaces require additional power to pump oxygen-containing gas into the aeration pipes using equipment such as air hammers for soil aeration each time. Furthermore, the frequency of aeration is limited due to the need for manual operation.

[0008] Therefore, there is an urgent need to provide a new solution to address the defects and shortcomings of the existing technologies. Summary of the Invention

[0009] To address the deficiencies and shortcomings of existing technologies, this invention provides a non-powered soil aeration system for bioretention facilities and its control method.

[0010] The specific solution provided by this invention is as follows:

[0011] A non-powered soil aeration system for a bioretention facility includes a water storage module and an aeration module disposed inside and interconnected with the soil layer. The water storage module is connected to the soil layer to receive rainwater and provide aeration to the soil layer. A drain outlet that can be selectively opened and closed is provided on one side of the aeration module, through which rainwater inside the aeration module can be discharged and outside air can be introduced into the aeration module and the water storage module. The system is characterized in that: a lifting support unit and a gate control unit are also provided inside the aeration module. The lifting support unit can selectively provide support to the gate control unit according to changes in the liquid level inside the aeration module, and the gate control unit can control the opening and closing of the drain outlet according to changes in the liquid level inside the aeration module.

[0012] As a further preferred embodiment of the present invention, the lifting support unit includes a support float that can rise and fall synchronously with the liquid level inside the ventilated module. One side of the support float is connected to the support member through a transmission component that is rotatably disposed inside the ventilated module. The support float drives the support member to rise and fall inside the ventilated module through the transmission component.

[0013] As a further preferred embodiment of the present invention, a guide rail is fixedly provided inside the breathable module, and the support member is located inside the guide rail and can move up and down relative to the guide rail.

[0014] As a further preferred embodiment of the present invention, the gate control unit includes a balance component rotatably disposed inside the ventilation module. The bottom side of one side of the balance component can abut against the top of the support component, and the other side of the balance component is fixedly connected to the gate float. The gate float is flexibly connected to the gate through a connector, and the gate is adapted to the drain outlet.

[0015] As a further preferred embodiment of the present invention, the balancing component is rotatably disposed inside the breathable module via a hinge point, and the balancing component is made of a water-absorbing material.

[0016] As a further preferred embodiment of the present invention, the side of the balancing member near the support member is provided with an extension that abuts against the support member.

[0017] As a further preferred embodiment of the present invention, when the balancing member does not absorb water, the sum of the masses of the balancing member and the extension located to the left of the hinge point is equal to the sum of the masses of the balancing member and the gate float located to the right of the hinge point.

[0018] As a further preferred embodiment of the present invention, when the rainwater inside the initial ventilation module has not reached the first liquid level, the lifting support unit provides support for the door control unit; when the rainwater inside the ventilation module rises to the first liquid level, the lifting support unit cancels the support for the door control unit; and when the rainwater inside the ventilation module drops to the third liquid level, the lifting support unit resumes the support for the door control unit; and the first liquid level is higher than the third liquid level.

[0019] As a further preferred embodiment of the present invention, when the rainwater inside the initial ventilation module has not reached the second liquid level, the gate control unit does not rotate inside the ventilation module to control the drain outlet to close. When the rainwater inside the ventilation module rises to the second liquid level, the gate control unit rotates to control the drain outlet to open. When the rainwater inside the ventilation module drops to the third liquid level, the gate control unit rotates back to its original position under the support of the lifting support unit and controls the drain outlet to close by relying on the weight of the gate. The second liquid level is higher than the first liquid level.

[0020] Furthermore, the present invention also provides a control method for a non-powered soil aeration system in a bioretention facility, characterized by comprising the following steps:

[0021] S1: When it starts to rain, rainwater seeps into the water storage module through the soil layer. The rainwater inside the water storage module flows into the ventilation module. The gate closes the drain outlet due to its own weight, and the rainwater cannot be drained through the drain outlet.

[0022] S2: Due to the closure of the drain outlet, the liquid level inside the water storage module and the air vent module rises continuously with the increase of rainfall. The rising liquid level inside the water storage module squeezes the space of the gas inside the water storage module, causing the gas inside the water storage module to gradually move upward to the soil layer until it is discharged, thus completing the aeration of the soil layer.

[0023] S3: The continuous rise in liquid level also causes the support float to rise synchronously, and the support float drives the support component to descend synchronously along the guide rail through the transmission component.

[0024] S4: When the liquid level inside the water storage module reaches the first liquid level, the support component descends along the guide rail and disengages from the gate control unit, and the support component's supporting effect on the gate control unit disappears.

[0025] S5: When the liquid level inside the venting module rises to the second level, it drives the gate float to rotate counterclockwise around the hinge point. The left side of the balance component absorbs water and increases in weight below the liquid level, and the weights on the left and right sides of the balance component are no longer balanced. The mass on the left side of the hinge point is greater than the mass on the right side. At this time, even if the liquid level drops, the balance component will drive the gate float to maintain the current angle. The gate float controls the gate to open through the connector. The water inside the interconnected water storage module and venting module is discharged into the subsequent rainwater well or rainwater pipe network through the drain outlet.

[0026] S6: When the liquid level inside the venting module is lower than the drain pipe opening, external air enters the venting module from the drain pipe and finally enters the water storage module.

[0027] S7: When the liquid level inside the venting module drops to the third level, the support float moves downward in sync with the liquid level. The support float drives the support component to rise synchronously along the guide rail through the transmission component until the support component touches the left extension of the balance component and continues to rise, thereby driving the balance component and the gate float to rotate clockwise along the hinge point. At this time, the counterweights on the left and right sides of the balance component are restored to balance, and the gate pulls the gate float to control the drain outlet to close under its own weight.

[0028] Compared with existing technologies, the technical effects that this invention can achieve include:

[0029] 1) This invention provides a non-powered soil aeration system for bioretention facilities and its control method. By modularly combining water storage modules and aeration modules, a uniform aeration effect can be achieved under the soil of regional green space facilities by arranging only a single or a small number of aeration modules, thereby reducing construction operations and costs.

[0030] 2) This invention provides a non-powered soil aeration system for bioretention facilities and its control method, which can perform a set of soil aeration cycles with each rainfall process. Compared with traditional aeration mechanisms, the soil aeration frequency is more frequent, thereby further increasing the soil aeration effect.

[0031] 3) This invention provides a non-powered soil aeration system for bioretention facilities and its control method. The entire soil aeration system is activated by rainwater as a power source, requiring no additional power support or manual operation. The energy used is green, environmentally friendly, clean, and can be sustainably recycled. Attached Figure Description

[0032] Figure 1 The diagram shown is a schematic diagram of the ventilation system provided by the present invention in its initial state.

[0033] Figure 2 The diagram shown is a structural installation diagram of the ventilation system provided by the present invention.

[0034] Figure 3 The diagram shows the state structure of the ventilation system provided by the present invention at the start of rainfall.

[0035] Figure 4 The diagram shown is a structural diagram of the ventilation system provided by the present invention at the start of aeration.

[0036] Figure 5 The diagram shown is a structural diagram of the ventilation system provided by the present invention during drainage.

[0037] Figure 6 The diagram shown is a structural diagram of the state when the water level drops during the drainage process of the ventilation system provided by the present invention.

[0038] Figure 7 The diagram shown is a structural diagram of the state when the ventilation system provided by the present invention reaches the third liquid level during the drainage process.

[0039] Figure 8 The diagram shown is a structural diagram of the ventilation system provided by the present invention when it is completely emptied during the drainage process. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] [First Embodiment]

[0044] like Figure 1-2 The image shows a non-powered soil aeration system for a bioretention facility according to a first embodiment of the present invention, comprising a water storage module 100 and an aeration module 200 disposed within the soil layer and interconnected by a connecting pipe 300, as shown. Figure 2 As shown, in this embodiment, the soil layer includes the original soil layer 500 and the backfill soil layer 400, and the water storage module 100 and the air permeability module 200 are disposed inside the backfill soil layer 400.

[0045] In this embodiment, the water storage module 100 is connected to the soil layer to receive rainwater and provide aeration. It is worth noting that the water storage module 100 in this solution is intended to assist the normal operation of the soil aeration system; its shape and type are not within the scope of protection of this application. Therefore, the shape of the water storage module 100 does not necessarily need to be set as described above. Figure 1-2 The shape of the water storage module 100 can be set to square, rectangular, or circular cross-sectional shapes as needed, as long as the water storage module 100 is configured to realize the function of underground water storage within the soil. Furthermore, the water storage module 100 can be a single unit directly connected to the aeration module 200 via the connecting pipe 300, or multiple interconnected water storage modules 100 can be configured and connected to the aeration module 200 via the connecting pipe 300, thereby meeting different water storage needs within the soil.

[0046] In this embodiment, the ventilation module 200 is provided with a drain outlet 201 that can be selectively opened and closed on one side. The drain outlet can discharge rainwater inside the ventilation module 200 and send outside air into the ventilation module 200 and the water storage module 100. The rainwater discharged from the ventilation module 200 can be discharged into the rainwater well 600 and then discharged into the rainwater pipe network at the bottom of the road surface 700, or it can be directly discharged into the rainwater pipe network at the bottom of the road surface 700.

[0047] The improvement of this embodiment compared to the prior art lies in the following: the ventilation module 200 is further equipped with a lifting support unit 200A and a gate control unit 200B. The lifting support unit 200A can selectively provide support to the gate control unit 200B according to the changes in the liquid level inside the ventilation module 200, and the gate control unit 200B can control the opening and closing of the drain outlet 201 according to the changes in the liquid level inside the ventilation module 200. Through the cooperation of the lifting support unit 200A and the gate control unit 200B, a set of soil aeration and circulation processes can be realized with each rainfall process. Compared with traditional aeration mechanisms, the soil aeration frequency is more frequent, thereby further increasing the soil aeration effect. At the same time, the entire soil aeration system is started by rainwater as power, without the need for additional power support or manual operation. The energy used is green, environmentally friendly, clean, and sustainably recyclable.

[0048] like Figure 1As shown, the lifting support unit 200A in this embodiment includes a support float A1 that can rise and fall synchronously with the liquid level inside the ventilation module 200. One side of the support float A1 is connected to the support member A3 through a transmission member A2 that is rotatably disposed inside the ventilation module 200. The support float A1 drives the support member A3 to rise and fall inside the ventilation module 200 through the transmission member A2. In order to further restrict the movement trajectory of the support member A3, a guide rail is fixedly disposed inside the ventilation module 200. The support member A3 is located inside the guide rail and can rise and fall relative to the guide rail.

[0049] This configuration ensures that: when the rainwater inside the initial ventilation module 200 has not reached the first liquid level, the lifting support unit 200A provides support for the gate control unit 200B; when the rainwater inside the ventilation module 200 rises to the first liquid level, the lifting support unit 200A cancels its support for the gate control unit 200B; and when the rainwater inside the ventilation module 200 drops to the third liquid level, the lifting support unit 200A resumes its support for the gate control unit 200B; and the first liquid level is higher than the third liquid level.

[0050] like Figure 1 As shown, the gate control unit 200B in this embodiment includes a balance member B1 rotatably disposed inside the ventilation module 200 via a hinge point B0. One bottom side of the balance member B1 can abut against the top of the support member A3. Under the abutment and support of the support member A3, the balance member B1 can help maintain balance and not rotate. Preferably, the side of the balance member B1 near the support member A3 is provided with an extension B5 that abuts against the support member A3, thereby maximizing the abutment area with the support member A3 and maintaining stable support. The other side of the balance member B1 is fixedly connected to the gate float B2. The gate float B2 is flexibly connected to the gate B4 via a connector B3. The gate B4 is adapted to the drain outlet 201. By rotating the balance member B1 inside the ventilation module 200, the gate B4 can be pulled through the connector B3 to open the drain outlet 201.

[0051] In this embodiment, to facilitate the rotation of the balance component B1 around the hinge point B0, the balance component B1 is preferably made of a water-absorbing material, so that: when the balance component B1 does not absorb water, the sum of the mass of the balance component and the extension located on the left side of the hinge point B0 is equal to the sum of the mass of the balance component and the gate float B2 located on the right side of the hinge point B0; and when the balance component B1 rotates counterclockwise, its left side enters below the liquid level and absorbs water, increasing its weight, thereby causing the balance component B1 to pull the gate B4 through the connector B3 and keep the gate float B2 at its current angle unchanged.

[0052] This configuration ensures that: when the rainwater inside the initial ventilation module 200 has not reached the second liquid level, the gate control unit 200B does not rotate inside the ventilation module 200 to control the drain outlet 201 to close; when the rainwater inside the ventilation module 200 rises to the second liquid level (at which point the second liquid level is higher than the first liquid level, and the support member A3 cancels its support for the balance member B1), the gate control unit 200B rotates to control the drain outlet 201 to open; and when the rainwater inside the ventilation module 200 drops to the third liquid level, the gate control unit 200B rotates back to its original position under the support of the lifting support unit 200A and controls the drain outlet 201 to close by relying on the weight of the gate B4; and the second liquid level is higher than the first liquid level.

[0053] [Second Embodiment]

[0054] like Figure 3-8 The method shown is a control method for a non-powered soil aeration system for a bioretention facility mentioned in the first embodiment of the present invention, provided in the second embodiment of the present invention, including the following steps:

[0055] S1: As Figure 3 As shown, when it starts to rain, rainwater seeps into the water storage module 100 through the soil layer. The rainwater inside the water storage module 100 flows into the ventilation module 200. The drain door B4 closes the drain outlet 201 due to its own weight, and the rainwater cannot drain through the drain outlet 201.

[0056] S2: As the drain outlet 201 is closed, the liquid level inside the water storage module 100 and the ventilation module 200 rises continuously with the increase of rainfall. The rising liquid level inside the water storage module 100 squeezes the space of the gas inside the water storage module 100, causing the gas inside the water storage module 100 to gradually move upward to the soil layer until it is discharged, thus completing the aeration of the soil layer.

[0057] S3: As the liquid level continues to rise, when the liquid level inside the water storage module 100 reaches the first liquid level, it will drive the support float A1 to rise synchronously. The support float A1 drives the support component A3 to descend synchronously along the guide rail through the transmission component A2. When the support component A3 descends along the guide rail and disengages from the gate control unit 200B, the supporting effect of the support component A3 on the gate control unit 200B disappears. Figure 4 As shown;

[0058] S4: When the liquid level inside the venting module 200 rises to the second liquid level, it drives the gate float B2 to rotate counterclockwise around the hinge point B0. Figure 5 As shown, when the left side of the balance component B1 absorbs water and gains weight below the liquid level, the weights on both sides of the balance component B1 are no longer balanced. The mass on the left side of the hinge point B0 is greater than the mass on the right side. At this time, even if the liquid level drops, the balance component B1 will still cause the valve float B2 to maintain its current angle. Figure 6As shown, the gate B4 is opened by the gate float B2 through the connector B3, and the water inside the interconnected water storage module 100 and the venting module 200 is discharged into the subsequent rainwater well or rainwater pipe network through the drain outlet 201.

[0059] S6: When the liquid level inside the venting module 200 is lower than the opening of the drain pipe 201, external air enters the venting module 200 from the drain pipe 201 and finally enters the water storage module 100.

[0060] S7: Until the liquid level inside the venting module 200 drops to the third liquid level, such as Figure 7 As shown, at this time, the liquid level inside the venting module 200 is close to empty. The support float A1 moves downward synchronously with the liquid level. The support float A1 drives the support component A3 to rise synchronously along the guide rail through the transmission component A2 until the support component A3 touches the left extension B5 of the balance component B1 and continues to rise, thereby driving the balance component B1 and the gate float B2 to rotate clockwise around the hinge point B0. At this time, the counterweights on the left and right sides of the balance component B1 are restored to balance. Under the action of its own gravity, the gate B4 pulls the gate float B2 to control the drain outlet 201 to close. Figure 8 As shown.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A non-powered soil aeration system for a bioretention facility, the system comprising a water storage module (100) and an aeration module (200) disposed within and interconnected within the soil layer, the water storage module (100) being connected to the soil layer to receive rainwater from the soil layer and to provide aeration to the soil layer; a drain outlet (201) is provided on one side of the aeration module (200) and can be selectively opened and closed, through which rainwater inside the aeration module (200) can be discharged and outside air can be introduced into the aeration module (200) and the water storage module (100); characterized in that: The ventilation module (200) is also equipped with a lifting support unit (200A) and a gate control unit (200B). The lifting support unit (200A) can selectively provide support to the gate control unit (200B) according to the change of liquid level inside the ventilation module (200). The gate control unit (200B) can control the opening and closing of the drain outlet (201) according to the change of liquid level inside the ventilation module (200). The lifting support unit (200A) includes a support float (A1) that can rise and fall synchronously with the liquid level inside the ventilated module (200). One side of the support float (A1) is connected to the support member (A3) through a transmission member (A2) that is rotatably installed inside the ventilated module (200). The support float (A1) drives the support member (A3) to rise and fall inside the ventilated module (200) through the transmission member (A2). The gate control unit (200B) includes a balance component (B1) rotatably disposed inside the ventilation module (200). One bottom side of the balance component (B1) can abut against the top of the support component (A3). The other side of the balance component (B1) is fixedly connected to the gate float (B2). The gate float (B2) is flexibly connected to the gate (B4) through the connector (B3). The gate (B4) is adapted to the drain outlet (201). The balancing component (B1) is rotatably mounted inside the breathable module (200) via a hinge point (B0), and the balancing component (B1) is made of a water-absorbing material. The balance member (B1) has an extension (B5) that abuts against the support member (A3) on the side near the support member (A3). When the balancing component (B1) is not absorbing water, the sum of the mass of the balancing component and the extension located to the left of the hinge point (B0) is equal to the sum of the mass of the balancing component and the gate float (B2) located to the right of the hinge point (B0).

2. The bioretention facility non-powered soil aeration system according to claim 1, characterized in that: The ventilation module (200) has a guide rail fixedly installed inside, and the support member (A3) is located inside the guide rail and can move up and down relative to the guide rail.

3. The bioretention facility non-powered soil aeration system according to claim 1, characterized in that: When the rainwater inside the initial ventilation module (200) has not reached the first liquid level, the lifting support unit (200A) provides support for the gate control unit (200B). When the rainwater inside the ventilation module (200) rises to the first liquid level, the lifting support unit (200A) cancels the support for the gate control unit (200B). When the rainwater inside the ventilation module (200) drops to the third liquid level, the lifting support unit (200A) resumes the support for the gate control unit (200B). The first liquid level is higher than the third liquid level.

4. The non-powered soil aeration system for a bioretention facility according to claim 3, characterized in that: When the rainwater inside the initial venting module (200) has not reached the second liquid level, the gate control unit (200B) does not rotate inside the venting module (200) to control the drain outlet (201) to close. When the rainwater inside the venting module (200) rises to the second liquid level, the gate control unit (200B) rotates to control the drain outlet (201) to open. When the rainwater inside the venting module (200) drops to the third liquid level, the gate control unit (200B) rotates to its original position under the support of the lifting support unit (200A) and controls the drain outlet (201) to close by relying on the weight of the gate. The second liquid level is higher than the first liquid level.

5. A control method for a non-powered soil aeration system of a bioretention facility according to any one of claims 2-4, characterized in that: Includes the following steps: S1: When it starts to rain, rainwater seeps into the water storage module (100) through the soil layer. The rainwater inside the water storage module (100) flows into the ventilation module (200). The gate (B4) closes the drain outlet (201) due to its own weight, and the rainwater cannot drain through the drain outlet (201). S2: Due to the closure of the drain outlet (201), the liquid level inside the water storage module (100) and the ventilation module (200) rises continuously with the increase of rainfall. The rising liquid level inside the water storage module (100) squeezes the space of the gas inside the water storage module (100), causing the gas inside the water storage module (100) to gradually move upward to the soil layer until it is discharged, thus completing the aeration of the soil layer. S3: The continuous rise in liquid level also causes the support float (A1) to rise synchronously. The support float (A1) drives the support component (A3) to descend synchronously along the guide rail through the transmission component (A2). S4: When the liquid level inside the water storage module (100) reaches the first liquid level, the support (A3) descends along the guide rail and disengages from the gate control unit (200B), and the supporting effect of the support (A3) on the gate control unit (200B) disappears; S5: When the liquid level inside the venting module (200) rises to the second liquid level, it drives the gate float (B2) to rotate counterclockwise around the hinge point (B0). The left side of the balance component (B1) enters below the liquid level and absorbs water, increasing its weight. The counterweights on the left and right sides of the balance component (B1) are no longer balanced. The mass on the left side of the hinge point (B0) is greater than the mass on the right side. At this time, even if the liquid level drops, the balance component (B1) will drive the gate float (B2) to maintain the current angle. The gate float (B2) controls the gate (B4) to open through the connector (B3). The water inside the interconnected water storage module (100) and the venting module (200) is discharged into the subsequent rainwater well or rainwater pipe network through the drain outlet (201). S6: When the liquid level inside the venting module (200) is lower than the drain outlet (201), external air enters the venting module (200) from the drain outlet (201) and finally enters the water storage module (100); S7: When the liquid level inside the venting module (200) drops to the third liquid level, the support float (A1) moves down synchronously with the liquid level. The support float (A1) drives the support (A3) to rise synchronously along the guide rail through the transmission component (A2) until the support (A3) touches the left extension (B5) of the balance component (B1) and continues to rise, thereby driving the balance component (B1) and the gate float (B2) to rotate clockwise along the hinge point (B0). At this time, the counterweights on the left and right sides of the balance component (B1) are restored to balance, and the gate (B4) pulls the gate float (B2) under its own gravity to control the drain outlet (201) to close.

Images