Rainwater collecting device
By introducing a switching device and a pressure relief valve into the rainwater harvesting device, the opening and closing of the inlet pipe is automatically controlled, solving the problems of evaporation and pollution on sunny days, and realizing automated rainwater harvesting and efficient rainwater storage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2026-03-31
AI Technical Summary
Existing rainwater harvesting devices suffer from water evaporation due to sunlight on sunny days, and are easily polluted by airborne particulate matter in arid regions with frequent sandstorms. In addition, they have low rainwater collection efficiency during short-term heavy rainfall and require high labor intensity for manual operation.
Design a rainwater collection device, including a collection container, a guide cover, a switching device, and a pressure relief valve. The opening and closing of the liquid inlet pipe is controlled by a balance bar and a counterweight. Combined with the pressure relief valve, it realizes automated rainwater collection and pressure relief to prevent evaporation and pollution.
It achieves automated rainwater collection and prevents evaporation, reduces the labor intensity of manual operation, improves the collection efficiency of rainwater during short-term heavy rainfall, and ensures the continuous operation of the device.
Smart Images
Figure CN224063563U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of rainwater harvesting equipment, and specifically relates to a rainwater harvesting device. Background Technology
[0002] In some arid regions, the water level of shallow groundwater continues to decline due to extreme drought and over-extraction of groundwater. Traditional well irrigation methods face the dilemma of large well depths and high construction costs. Therefore, rainwater harvesting and utilization has become a core water source replenishment method for residential water supply, agricultural micro-irrigation, and ecological restoration in these areas.
[0003] However, in existing technologies, rainwater harvesting devices are typically open-topped storage tanks. On sunny days, sunlight causes continuous evaporation of the stored water, leading to significant water waste. Furthermore, the region experiences frequent sandstorms, resulting in high concentrations of harmful suspended particulate matter in the air, which easily contaminates the stored water. While existing rainwater harvesting devices sometimes incorporate a baffle to prevent direct sunlight, addressing the issues of evaporation and contamination associated with traditional methods, this design also has drawbacks: during rainy weather, the baffle must be manually removed and replaced after the rain stops, requiring considerable labor. Additionally, it cannot quickly collect rainwater from short periods of heavy rainfall. Utility Model Content
[0004] The purpose of this invention is to provide a rainwater collection device that can automatically collect rainwater and prevent the stored rainwater from evaporating.
[0005] The following technical solutions are used to achieve the above objectives.
[0006] This utility model provides a rainwater collection device, which includes a collection container, a switching device, and a pressure relief valve.
[0007] One end of the collecting container is provided with a flow guide cover, and the flow guide cover has an inlet pipe communicating with the collecting container; the switching device includes a support rod, a balance rod, a counterweight, and a first sealing element; the support rod is provided on the side of the flow guide cover near the collecting container, the balance rod is rotatably mounted on the support rod, one end of the balance rod is provided with the counterweight, and the other end of the balance rod is provided with the first sealing element, the first sealing element has a first position and a second position, when the first sealing element is in the first position, it seals the opening of the inlet pipe, and when the first sealing element is in the second position, it separates from the opening of the inlet pipe;
[0008] The pressure relief valve is located on the flow guide cover and is connected to the collection container.
[0009] In some embodiments, the pressure relief valve includes a fixed pipe, a pressure relief pipe, and a second seal; the pressure relief pipe passes through the flow guide cover to form a pressure relief channel, and the first end of the pressure relief pipe exposed in the collector is connected to the fixed pipe; the second seal is movably disposed inside the fixed pipe, and the second seal has a third position and a fourth position, wherein when the second seal is in the third position, it blocks the first end of the pressure relief pipe, and when the second seal is in the fourth position, it is separated from the first end of the pressure relief pipe.
[0010] In some embodiments, the pressure relief pipe is vertically inserted through the flow guide cover, and there is a height difference between the top end of the fixing pipe and the top end of the flow guide cover, with the top end of the fixing pipe being lower than the top end of the flow guide cover.
[0011] In some embodiments, the guide cap has a guide surface on the side away from the collector to guide rainwater to the inlet pipe, and a liquid storage space is provided on one side of the guide surface; the peripheral wall of the fixed pipe is provided with a plurality of guide holes, which connect the fixed pipe and the liquid storage space.
[0012] In some embodiments, the second seal is a sealing ball, and the surface of the sealing ball is elastic.
[0013] In some embodiments, the side of the flow guide cap away from the collection vessel is a first side, and the side of the flow guide cap closer to the collection vessel is a second side; of the first side and the second side, at least the surface of the first side is an inclined surface, the inclined surface is inclined toward one side of the collection vessel to form an interface with a tapered end, the interface being connected to the inlet pipe.
[0014] In some embodiments, both the first and second sides of the flow guide cover are inclined surfaces.
[0015] In some embodiments, the first seal includes a sealing plate and a surrounding edge disposed on the sealing plate, and the balance bar is connected to the surrounding edge; when the first seal is used to seal the inlet of the liquid inlet pipe, the sealing plate abuts against the end face of the inlet of the liquid inlet pipe, and the surrounding edge surrounds the outer peripheral wall of the liquid inlet pipe.
[0016] In some embodiments, the first end of the support rod is connected to the guide cap, and the second end of the support rod is provided with a sleeve ring. The side of the sleeve ring away from the support rod has an opening to form a non-closed ring. The opposite sides of the sleeve ring are respectively provided with a first connecting hole and a second connecting hole. The balance rod is provided with a third connecting hole. The balance rod passes through the sleeve ring, and the balance rod passes through the first connecting hole, the third connecting hole and the second connecting hole in sequence through a rotating shaft to be rotatably connected to the sleeve ring.
[0017] In some embodiments, the balance bar is a threaded bar, and the counterweight is threadedly connected to the threaded bar.
[0018] The technical solution provided by this utility model has the following advantages and effects:
[0019] This rainwater harvesting device incorporates a switching mechanism between the inlet pipe of the guide cover and the collecting container. This mechanism utilizes a counterweight and a first seal at each end of a balance bar. The first seal movably seals the inlet pipe opening. When it is not raining, the first seal blocks the inlet pipe opening to prevent rainwater evaporation inside the collecting container. When it rains, rainwater collects at the inlet pipe through the guide cover, generating gravity that acts on the first seal. When the gravity acting on the first seal exceeds the counterweight, it causes the first seal to swing downwards, opening the inlet pipe opening. Rainwater then enters the collecting container, achieving rainwater collection. A pressure relief valve located at the guide cover controls the opening and closing of the collecting container. This valve automatically releases pressure when the pressure inside the collecting container exceeds the external pressure, ensuring the first seal can open and close normally and guaranteeing the continuous and automated operation of the rainwater harvesting device. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of the rainwater collection device according to an embodiment of the present invention;
[0021] Figure 2 yes Figure 1 A schematic diagram of the longitudinal cross-sectional structure of a rainwater harvesting device;
[0022] Figure 3 This is a schematic diagram of the switching device according to an embodiment of the present invention;
[0023] Figure 4 yes Figure 3 A schematic diagram of the switching device from another angle;
[0024] Figure 5 This is a schematic diagram of the pressure relief valve according to an embodiment of the present invention.
[0025] Explanation of reference numerals in the attached figures:
[0026] 100. Rainwater harvesting device;
[0027] 1. Collection container; 2. Switching device; 21. Support rod; 22. Balance bar; 23. Counterweight; 24. First seal; 241. Sealing plate; 242. Surrounding edge; 25. Connecting ring; 26. Rotating shaft; 3. Pressure relief valve; 31. Fixing pipe; 311. Flow guide hole; 32. Second seal; 33. Pressure relief pipe; 4. Flow guide cover; 41. Liquid inlet pipe; 43. Liquid storage space; 44. Interface. Detailed Implementation
[0028] To facilitate understanding of this utility model, the specific embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.
[0029] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.
[0030] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.
[0031] It should be noted that in this article, "fixed to" or "connected to" can mean directly fixed to or connected to a component, or indirectly fixed to or connected to a component.
[0032] This utility model embodiment provides a rainwater collection device 100, such as Figures 1 to 5 As shown, the rainwater collection device 100 includes a collection container 1, a switching device 2, and a pressure relief valve 3.
[0033] One end of the collecting vessel 1 is provided with a flow guide cover 4, and the flow guide cover 4 has an inlet pipe 41 communicating with the collecting vessel 1; the switching device 2 includes a support rod 21, a balance rod 22, a counterweight 23, and a first sealing element 24; the support rod 21 is provided on the side of the flow guide cover 4 near the collecting vessel 1, the balance rod 22 is rotatably mounted on the support rod 21, one end of the balance rod 22 is provided with the counterweight 23, and the other end of the balance rod 22 is provided with the first sealing element 24, the first sealing element 24 has a first position and a second position, when the first sealing element 24 is in the first position, it seals the opening of the inlet pipe 41, and when the first sealing element 24 is in the second position, it separates from the opening of the inlet pipe 41; the pressure relief valve 3 is provided on the flow guide cover 4, the pressure relief valve 3 is communicating with the collecting vessel 1, and the pressure relief valve 3 is used to control the opening and closing of the pressure relief of the collecting vessel 1. The collection container 1 is used to store the collected rainwater. A guide cover 4 is located at the top of the collection container 1. Rainwater flows into the collection container 1 through the inlet pipe 41 along the guide cover 4. The collection container 1 can be a collection bucket or a collection pool, etc., without any particular limitation. The inlet pipe 41 is closed when it is not raining to prevent the rainwater stored in the collection container 1 from evaporating. It is open when it rains, and rainwater flows into the collection container 1 through the inlet pipe 41 for collection. The opening and closing state of the inlet pipe 41 is controlled by the switch device 2. Specifically, the switch device 2 is set inside the collector 1. A counterweight 23 is set at one end of the balance bar 22, and a first sealing element 24 that can block the inlet pipe 41 is set at the other end. When it is not raining, no water enters the inlet pipe 41, and the first sealing element 24 is in an unloaded state. The end of the balance bar 22 corresponding to the first sealing element 24 is lighter than the counterweight 23, which causes the first sealing element 24 to tilt upward and block the opening of the inlet pipe 41. When it rains, rainwater flows through the guide cover 4 and gathers at the inlet pipe 41, generating gravity that acts on the first sealing element 24. When it gathers to a certain extent, the end of the balance bar 22 corresponding to the first sealing element 24 is heavier than the counterweight 23, which causes the first sealing element 24 to tilt downward and open the opening of the inlet pipe 41. At this time, rainwater enters the collector 1, thus achieving the purpose of rainwater collection. The pressure relief valve 3 is designed so that when the pressure inside the collecting vessel 1 is greater than the external pressure, the first seal 24 cannot open normally due to the internal pressure of the collecting vessel 1. In this case, the pressure relief valve 3 can be used to control the pressure relief operation of the collecting vessel 1, so that the first seal 24 can open normally. The pressure relief valve 3 can be a mechanical pressure relief valve or an electronic pressure relief valve, such as a spring-loaded pressure relief valve or a piston-loaded pressure relief valve. It can automatically open or close the pressure relief operation according to the pressure inside the collecting vessel 1, and there are no special restrictions.
[0034] In summary, the rainwater collection device 100 incorporates a switching device 2 between the inlet pipe 41 of the guide cover 4 and the collection container 1. This switching device 2 is equipped with a counterweight 23 and a first sealing element 24 at both ends of a balance rod 22. The first sealing element 24 movably seals the opening of the inlet pipe 41. When it is not raining, the first sealing element 24 is in a sealed state to prevent rainwater evaporation inside the collection container 1. When it rains, rainwater is collected at the inlet pipe 41 through the guide cover 4, generating gravity that acts on the first sealing element 24. When the weight of the first seal 24 is greater than that of the counterweight 23, it causes the first seal 24 to swing downward to open the inlet pipe 41. At this time, rainwater enters the collector 1, achieving the purpose of rainwater collection. In conjunction with the pressure relief valve 3 set at the guide cover 4 to control the opening and closing of the collector 1, the pressure relief valve 3 can be set on the collector 1 when the pressure inside the collector 1 is greater than the external pressure, so that the first seal 24 can open and close normally, thereby ensuring the continuous and automated operation of the rainwater collection device 100.
[0035] In some embodiments, such as Figure 2 and Figure 5As shown, the pressure relief valve 3 includes a fixed pipe 31, a pressure relief pipe 33, and a second sealing element 32. The pressure relief pipe 33 passes through the guide cover 4 to form a pressure relief channel. The two opposite ends of the pressure relief pipe 33 along its own axial direction are a first end and a second end, respectively. The first end of the pressure relief pipe 33 exposed in the collecting container 1 is connected to the fixed pipe 31. The second end of the pressure relief pipe 33 extends into the collecting container 1. The second sealing element 32 is movably disposed in the fixed pipe 31, and the second sealing element 32 has a third position and a fourth position. When the second sealing element 32 is in the third position, it blocks the first end of the pressure relief pipe 33. When the second sealing element 32 is in the fourth position, it is separated from the first end of the pressure relief pipe 33. Specifically, the second sealing element 32 is a structure with a certain gravity, and its gravity is adapted to the air pressure when the collecting container 1 needs to be depressurized. No special limitation is made here. Furthermore, the second sealing element 32 can be configured with different shapes according to the shape of the pressure relief pipe 33, forming a conformal contact interface based on the end face contour of the first end of the pressure relief pipe 33, ensuring a tight fit between the second sealing element 32 and the contact surface of the first end of the pressure relief pipe 33. For example, the second sealing element 32 can be a square or a sphere, etc., without any particular limitation. When the weight of the second sealing element 32 is greater than the internal pressure of the collecting container 1, the second sealing element 32 is in the third position, sealing the first end of the pressure relief pipe 33 to prevent rainwater from evaporating inside the collecting container 1. When the internal pressure of the collecting container 1 is too high and exceeds the weight of the second sealing element 32, the internal pressure of the collecting container 1 will push the second sealing element 32 upward, causing the second sealing element 32 to separate from the first end of the pressure relief pipe 33. At this time, external gas can enter the collecting container 1 through the pressure relief pipe 33, achieving the purpose of pressure relief. It should be noted that the diameter of the fixed tube 31 is larger than the diameter of the pressure relief tube 33, and the diameter of the second sealing member 32 is adapted to the diameter of the fixed tube 31 so that the second sealing member 32 can block the first end of the pressure relief tube 33.
[0036] In some embodiments, such as Figure 1 and Figure 2As shown, the pressure relief pipe 33 is vertically inserted through the guide cover 4, and there is a height difference between the top end of the fixed pipe 31 and the top end of the guide cover 4, with the top end of the fixed pipe 31 being lower than the top end of the guide cover 4. When it rains, if the internal pressure of the collector 1 is too high, preventing the first seal 24 from opening properly, and the internal pressure of the collector 1 is insufficient to lift the second seal 32, rainwater will collect inside the guide cover 4. When the height of the rainwater inside the guide cover 4 is higher than the top end of the fixed pipe 31, the rainwater can enter the fixed pipe 31. Under the combined effect of the internal pressure of the collector 1 and the buoyancy of the rainwater, the second seal 32 can be lifted, separating it from the first end of the pressure relief pipe 33. At this point, external gas can enter the collector 1 through the pressure relief pipe 33, achieving pressure relief and allowing the first seal 24 to open normally.
[0037] In other embodiments, such as Figure 2 and Figure 5 As shown, the guide cover 4 has a guide surface that guides rainwater to the inlet pipe 41, and the guide surface forms a liquid storage space 43; the peripheral wall of the fixed pipe 31 is provided with a plurality of guide holes 311, and the guide holes 311 connect the fixed pipe 31 and the liquid storage space 43. Understandably, when it rains, the internal pressure of the collector 1 is too high, causing the first seal 24 to be unable to open normally. When the rainwater collects in the liquid storage space 43 of the guide cover 4, the rainwater can enter the fixed pipe 31 through the guide holes 311 on the peripheral wall of the fixed pipe 31, so that the second seal 32 can be lifted by the internal pressure of the collector 1 and the buoyancy of the rainwater to relieve the pressure inside the collector 1. It should be noted that the structure of the flow guide hole 311 on the periphery of the fixed tube 31 and the structure of the top of the fixed tube 31 being lower than the top of the flow guide cover 4 can be replaced by each other or can be set on the fixed tube 31 at the same time. That is, the structure of the flow guide hole 311 on the periphery of the fixed tube 31 and the structure of the top of the fixed tube 31 being lower than the top of the flow guide cover 4 can quickly depressurize the collector 1 when the rainfall is too heavy. No special restrictions are made here.
[0038] In some embodiments, such as Figure 2As shown, the second sealing element 32 is a sealing ball, and the surface of the sealing ball is elastic. The structure of the elastic sealing ball allows for a better and tighter fit with the first end face of the pressure relief pipe 33, and gaps exist between the bottom sides of the sealing ball and the inner wall of the fixed pipe 31 to allow rainwater to enter, enabling the sealing ball to float and release pressure. It should be noted that in this embodiment, the fixed pipe 31 has a cylindrical tube structure, and the diameter of the sealing ball is adapted to the diameter of the fixed pipe 31, meaning the sealing ball can float up and down within the fixed pipe 31, while ensuring that its bottom end always corresponds to the second end of the pressure relief pipe 33 during the floating process. Of course, in other embodiments, the second sealing element 32 can also be a cuboid, cube, or cone, etc., without particular limitation.
[0039] In some embodiments, such as Figure 2 As shown, the side of the guide cover 4 furthest from the collector 1 is the first side, which has the aforementioned guiding surface. The side of the guide cover 4 closest to the collector 1 is the second side. Of the first and second sides, at least the surface of the first side is an inclined surface. Understandably, the guide cover 4 may only have an inclined surface on the first side, while the surface of the other side may be a plane, concave, convex, etc. Of course, the guide cover 4 may also have an inclined surface structure on both the first and second sides; no particular limitation is made here. The inclined surface slopes towards the collector 1 to form a tapered interface 44, which communicates with the inlet pipe 41. The inclined surface structure of the first side allows rainwater to be naturally guided to the inlet pipe 41. Specifically, in this embodiment, the first and second sides of the flow guide cover 4 are both inclined surfaces, so that the flow guide cover 4 forms a conical funnel structure. The second side of the flow guide cover 4 is an inclined surface structure, which can facilitate the installation of the switch device 2 and the tilting or lowering movement of the balance bar 22 under the action of the counterweight 23 and the first seal 24, and avoid the structure of the flow guide cover 4 causing interference.
[0040] In some embodiments, such as Figure 3 and Figure 4As shown, the first sealing element 24 includes a sealing plate 241 and a surrounding edge 242 disposed on the sealing plate 241. The balance rod 22 is connected to the surrounding edge 242. When the first sealing element 24 seals the opening of the liquid inlet pipe 41, the sealing plate 241 abuts against the end face of the opening of the liquid inlet pipe 41, and the surrounding edge 242 surrounds the outer peripheral wall of the liquid inlet pipe 41. The sealing plate 241 is pressed tightly against the end face of the opening of the liquid inlet pipe 41 by the pressure of the balance rod 22, creating an end-face contact seal. The inner wall of the surrounding edge 242 cooperates with the outer wall of the liquid inlet pipe 41, achieving a double seal on both sides and improving the sealing effect. Specifically, the inlet pipe 41 can be a circular pipe, the sealing plate 241 can be a circular plate, and the surrounding edge 242 can be an annular surrounding edge. Of course, in other embodiments, the inlet pipe 41 can also be other shapes, such as a square pipe, and the sealing plate 241 and the surrounding edge 242 can be adapted to the shape of the inlet pipe 41. No special restrictions are imposed here.
[0041] In some embodiments, the edge of the flow guide cover 4 forms a straight overlapping ring, and the collecting container 1 is a cylindrical tube. The overlapping ring is detachably attached to the top edge of the collecting container 1, which facilitates the assembly and disassembly of the flow guide cover 4, improves the stability of the flow guide cover 4 under load, and enhances the airtightness between the collecting container 1 and the flow guide cover 4.
[0042] In some embodiments, such as Figures 2-4 As shown, the first end of the support rod 21 is connected to the guide cover 4, and the second end of the support rod 21 is provided with a sleeve ring 25. The side of the sleeve ring 25 away from the support rod 21 has an opening to form a non-closed ring structure. The opposite sides of the sleeve ring 25 are respectively provided with a first connecting hole and a second connecting hole (not shown in the figure). The balance rod 22 is provided with a third connecting hole. The balance rod 22 passes through the sleeve ring 25, and the balance rod 22 passes through the first connecting hole, the third connecting hole and the second connecting hole in sequence through the rotating shaft 26 to be rotatably connected to the sleeve ring 25. The balance bar 22 has a third connecting hole in its center that extends radially through it. The sleeve ring 25 has a first connecting hole and a second connecting hole at its front and rear ends, respectively. When the balance bar 22 passes through the sleeve ring 25, the rotating shaft 26 passes through the first connecting hole, the third connecting hole, and the second connecting hole in sequence, so that the balance bar 22 can be confined within the sleeve ring 25, and the two ends of the balance bar 22 can swing up and down around the rotating shaft 26.
[0043] In some embodiments, such as Figure 3 As shown, the balance bar 22 is a threaded bar, and the counterweight 23 is threadedly connected to the threaded bar. Understandably, adjusting the position of the counterweight 23 on the balance bar 22 can adjust the sensitivity of the opening and closing of the first seal 24.
[0044] The above embodiments are not an exhaustive list based on the present invention, and there may be other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.
Claims
1. Rainwater collection apparatus characterised in that, The rainwater collecting device comprises a collecting vessel, a switch device and a pressure relief valve; One end of the collecting vessel is provided with a flow guide cover, and a liquid inlet pipe is formed in the flow guide cover and communicates with the collecting vessel; the switch device comprises a supporting rod, a balance rod, a counterweight and a first sealing member; the supporting rod is arranged on one side of the flow guide cover close to the collecting vessel; the balance rod is rotatably arranged on the supporting rod; one end of the balance rod is provided with the counterweight; the other end of the balance rod is provided with the first sealing member; the first sealing member has a first position and a second position; when the first sealing member is in the first position, it blocks the pipe orifice of the liquid inlet pipe; when the first sealing member is in the second position, it is separated from the pipe orifice of the liquid inlet pipe; The pressure relief valve is arranged on the flow guide cover and communicates with the collecting vessel.
2. The rainwater harvesting apparatus of claim 1, wherein, The pressure relief valve comprises a fixed pipe, a pressure relief pipe and a second sealing member; the pressure relief pipe is arranged through the flow guide cover to form a pressure relief channel; the pressure relief pipe is exposed to the first end of the collecting vessel and communicates with the fixed pipe; the second sealing member is movably arranged in the fixed pipe; the second sealing member has a third position and a fourth position; when the second sealing member is in the third position, it blocks the first end of the pressure relief pipe; when the second sealing member is in the fourth position, it is separated from the first end of the pressure relief pipe.
3. The rainwater harvesting apparatus of claim 2, wherein, The pressure relief pipe is vertically arranged through the flow guide cover; the top end of the fixed pipe is lower than the top end of the flow guide cover.
4. The rainwater harvesting device of claim 2, wherein, The side of the flow guide cover away from the collecting vessel has a flow guide surface for guiding rainwater to the liquid inlet pipe; one side of the flow guide surface has a liquid storage space; a plurality of flow guide holes are formed in the peripheral wall of the fixed pipe; the flow guide holes communicate the fixed pipe and the liquid storage space.
5. The rainwater collection apparatus of claim 2, wherein, The second sealing member is a sealing ball, and the surface of the sealing ball is elastic.
6. The rainwater collection apparatus of claim 1, wherein, The side of the flow guide cover away from the collecting vessel is a first side, and the side of the flow guide cover close to the collecting vessel is a second side; among the first side and the second side, at least the surface of the first side is an inclined surface; the inclined surface is inclined towards one side of the collecting vessel to form an interface with a tapered end; the interface communicates with the liquid inlet pipe.
7. The rainwater collection apparatus of claim 6, wherein, Both the first side and the second side of the flow guide cover are inclined surfaces.
8. The rainwater harvesting apparatus of any one of claims 1 to 7, wherein, The first sealing member comprises a sealing plate and a surrounding edge arranged on the sealing plate; the balance rod is connected with the surrounding edge; when the first sealing member blocks the pipe orifice of the liquid inlet pipe, the sealing plate abuts against the end surface of the pipe orifice of the liquid inlet pipe, and the surrounding edge surrounds the peripheral wall of the liquid inlet pipe.
9. The rainwater harvesting device of any one of claims 1 to 7, wherein, The first end of the supporting rod is connected with the flow guide cover; the second end of the supporting rod is provided with a sleeving ring; the side of the sleeving ring away from the supporting rod has an opening to form a non-closed ring body; first and second connecting holes are respectively formed in the opposite sides of the sleeving ring; the balance rod is provided with a third connecting hole; the balance rod is arranged through the sleeving ring, and the balance rod is rotatably connected with the sleeving ring by being arranged through the first connecting hole, the third connecting hole and the second connecting hole in sequence via a rotating shaft.
10. The rainwater harvesting apparatus of any one of claims 1 to 7, wherein, The counterbalance is a threaded rod, and the weight is threadedly connected to the threaded rod.