A rainwater collection system capable of realizing initial rainwater treatment and storage

Abstract

The present invention provides a rainwater collection system capable of processing and storing initial rainwater, comprising a rainwater inspection well, a rainwater inlet connecting pipe, an initial rainwater bypass pipe, a rainwater main pipe, and a valve well. The rainwater main pipe is connected to the bottom of the rainwater inspection well. A water storage chamber is provided in the rainwater inspection well. A water baffle is also provided in the rainwater inspection well to separate the rainwater main pipe and the water storage chamber. When the water baffle is opened, the water storage chamber is connected to the rainwater main pipe. The rainwater inlet connecting pipe and the initial rainwater bypass pipe are both connected to the water storage chamber. The other end of the initial rainwater bypass pipe is connected to the valve well. An electric gate valve is provided in the valve well. The outlet end of the electric gate valve is connected to the sewage treatment system. When it rains, the initial rainwater enters the valve well through the water storage chamber and the rainwater collection pipe. The electric gate valve opens to discharge the rainwater to the sewage treatment plant for treatment. The electric gate valve closes the rainwater inlet connecting pipe, and the rainwater overflows from the top of the baffle to the rainwater main pipe, and then the rainwater is discharged to rivers and other water systems through the rainwater main pipe, avoiding direct flow into the water system and polluting the water quality.

Description

Technical Field

[0001] The present invention relates to the technical field of rainwater treatment, and in particular to a rainwater collection system capable of realizing initial rainwater treatment and storage. Background Art

[0002] In recent years, my country has been undergoing a period of continuous and in-depth urbanization. With the advancement of urbanization, urban flooding has become increasingly prominent. Once urban ground has hardened, the receiving surface becomes impermeable, making it difficult for rainwater to infiltrate. Most of this rainwater is lost as surface runoff, significantly increasing both the total volume of rainwater discharged and peak flows. Comprehensive urban rainwater storage and regulation can alleviate pressure on drainage systems. The storage capacity of rainwater control and utilization facilities can absorb large amounts of rainwater from hardened ground, reducing the peak flow of rainwater discharged from the entire project site. Reducing peak discharge flows reduces the total volume of rainwater discharged, alleviating pressure on urban flood control and the peak flood load on the receiving rivers. In addition to controlling the total annual runoff, rainwater control and utilization projects also require controlling peak runoff flows. However, initial rainwater contains significant amounts of pollutants, and direct discharge into rivers can pollute the aquatic environment. Initial rainwater refers to the initial stage of rainfall. Rainwater dissolves a large amount of acidic gases, automobile exhaust, factory exhaust and other pollutants in the air. After falling to the ground, it washes over roofs, asphalt concrete roads, etc., causing the initial rainwater to contain a large amount of pollutants. The pollution level of the initial rainwater is high, even exceeding the pollution level of ordinary urban sewage. As the rainfall process continues, surface pollutants gradually decrease, and the water quality of the later runoff improves. The current method of controlling the pollution of the water environment caused by direct rainwater discharge is mainly to intercept the initial rainwater and try to absorb the rainfall locally. By controlling the amount of rainwater discharged, the amount of pollutants discharged can be reduced while reducing the amount of pollutants discharged.

[0003] Currently, urban stormwater systems are primarily divided into intercepting combined sewer systems and diversion systems. Controlling intercepting combined sewer systems in my country is primarily achieved by increasing the project's interception multiple (n0). The value of n0 directly impacts project scale, investment, and environmental benefits. If n0 is too low, excessive surface rainwater and sewage overflow from pipe networks during heavy rainfall will exceed the water body's self-purification capacity, and the overflow of mixed rainwater and sewage will cause water pollution. If n0 is too high, the scale of intercepting mains, stormwater pumping stations, and sewage treatment plants will increase significantly, resulting in excessive investment costs. This will also lead to significant differences in flow rates between rainy and dry weather, negatively impacting operational performance and costs. Summary of the Invention

[0004] The purpose of the present invention is to provide a rainwater collection system that can realize the treatment and storage of initial rainwater, which can effectively transport the initial rainwater to the sewage treatment plant, thereby preventing the initial rainwater from entering the water system and polluting the water quality.

[0005] The embodiments of the present invention are achieved through the following technical solutions:

[0006] A rainwater collection system capable of processing and storing initial rainwater, comprising a rainwater inspection well, a rainwater inlet connecting pipe, an initial rainwater bypass pipe, a rainwater main pipe and a valve well; the rainwater main pipe is connected to the bottom of the rainwater inspection well; a water storage chamber is provided in the rainwater inspection well; a water baffle is also provided in the rainwater inspection well for isolating the rainwater main pipe and the water storage chamber; the water storage chamber is connected to the rainwater main pipe when the water baffle is opened; the rainwater inlet connecting pipe and the initial rainwater bypass pipe are both connected to the water storage chamber; the other end of the initial rainwater bypass pipe is connected to the valve well; an electric gate valve is provided in the valve well; the water outlet end of the electric gate valve is connected to a sewage treatment system.

[0007] Furthermore, the electric gate valve is electrically connected to a control unit; the control unit includes a rainfall monitor and a control circuit; the electric gate valve and the rainfall monitor are both connected to the control circuit; the control circuit controls the opening and closing of the electric gate valve according to the monitoring signal of the rainfall monitor.

[0008] Furthermore, a water storage cavity and a water baffle are respectively provided on two opposite sides of the rainwater inspection well; each of the water storage cavities is connected to a rainwater inlet connecting pipe and an initial rainwater bypass pipe.

[0009] Furthermore, each valve well corresponds to several rainwater inspection wells; the initial rainwater bypass pipe and rainwater main pipe of the upstream rainwater inspection well are connected to the initial rainwater bypass pipe and rainwater main pipe of the downstream rainwater inspection well; the initial rainwater bypass pipe of the most downstream rainwater inspection well is connected to the electric gate valve; the rainwater main pipe of the most downstream rainwater inspection well is connected to the downstream rainwater well.

[0010] Furthermore, a manual gate valve and a check valve are also provided in the valve well; the check valve and the manual gate valve are connected in sequence upstream of the electric gate valve; and a manual gate valve is also provided downstream of the electric gate valve.

[0011] Furthermore, water baffle grooves are provided on the two opposite inner walls of the rainwater inspection well; the two sides of the water baffle are each inserted into one of the water baffle grooves and can slide up and down along the water baffle grooves; a reel for winding the water baffle is also provided inside the rainwater inspection well; a control disk for controlling the rotation of the reel is also provided inside the rainwater inspection well.

[0012] Furthermore, the water retaining plate includes a plurality of splicing pieces and a water retaining piece; the plurality of splicing pieces are spliced ​​into a plate shape; two adjacent splicing pieces are hinged; the splicing pieces are provided with a limit block and a limit part; the limit block and the limit part of the two adjacent splicing pieces are cooperatively arranged so that when the two adjacent splicing pieces rotate in one direction until the limit block and the limit part abut against each other, the limit block and the limit part prevent the two adjacent splicing pieces from continuing to rotate; when the two adjacent splicing pieces stop rotating, the two are located in the same plane; the stopping direction of each group of limit blocks and limit parts is the same, so that one side of the plurality of splicing pieces can be bent into an inward concave surface; the water retaining piece is arranged on one side of the bent inward concave surface of the plurality of splicing pieces.

[0013] Furthermore, a driving tooth is provided on the side of the splicing piece away from the water retaining plate; a transmission gear is provided inside the rainwater inspection well to cooperate with the driving tooth, so that the rotation of the transmission gear can push the splicing piece into the water retaining plate groove.

[0014] Furthermore, the control disk is also provided with a transmission mechanism; a driving gear is provided at one end of the transmission mechanism away from the control disk; the rotating shaft of the reel and the rotating shaft of the transmission gear are both provided with a driven gear meshing with the driving gear; the teeth of the driven gear are hinged to the main body of the driven gear; the main body of the driven gear is provided with a blocking portion that blocks the teeth from rotating in the same direction, so that several teeth of the driven gear can only swing in the same direction; the swinging directions of the teeth of the two driven gears are set in opposite directions.

[0015] Furthermore, a reset spring is provided between the gear teeth and the driven gear body to reset the gear teeth after the gear teeth lose the swinging thrust.

[0016] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0017] The rainwater collection system of the present invention, which can process and regulate initial rainwater, normally lowers the water baffle so that the water baffle separates the water storage chamber from the rainwater main pipe. When it rains, the initial rainwater passes through the rainwater grate on the ground and enters the rainwater outlet connecting pipe, and then enters the water storage chamber. The rainwater inside the water storage chamber enters the valve well through the initial rainwater bypass pipe. At this time, the electric gate valve in the valve well opens, and the rainwater is discharged to the sewage treatment plant for treatment. After it rains for a period of time, the electric gate valve closes. At this time, the rainwater input from the rainwater outlet connecting pipe overflows through the top of the water baffle into the rainwater main pipe, and then the rainwater is discharged into rivers and other water systems through the rainwater main pipe. After the rain stops, the water baffle is raised to allow the rainwater in the water storage chamber to flow completely into the rainwater main pipe and be discharged. When cleaning and inspecting the rainwater inspection well on sunny days, the rainwater baffle slides down along the water baffle groove to the inspection well flow channel, and the maintenance personnel enter to inspect.

[0018] By controlling the opening and closing of the water retaining plate and the electric gate valve, initial rainwater is effectively intercepted and transported to the sewage treatment plant, preventing it from flowing directly into the water system and polluting the water quality. Subsequent rainwater is discharged directly into the water system through the stormwater main. This simple structure achieves both initial rainwater treatment and storage, avoiding the need for an overly large-scale drainage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of a rainwater collection system capable of achieving initial rainwater treatment and storage according to the present invention;

[0021] Figure 2 for Figure 1 AA cross-sectional view;

[0022] Figure 3 for Figure 2 Enlarged view of point a in the middle;

[0023] Figure 4 for Figure 1 BB cross-sectional view;

[0024] Figure 5 Schematic diagram of the cooperation between the driving gear and the driven gear;

[0025] Figure 6 for Figure 5 The enlarged image of point b in the middle;

[0026] Figure 7 Schematic diagram of the coordination between the water retaining plate and the surrounding structure

[0027] Figure 8 for Figure 7 Enlarged view of point c in the middle.

[0028] Icons: 1-rainwater inspection well, 11-water storage chamber, 12-water retaining plate groove, 13-reel, 14-control panel, 15-transmission gear, 2-rainwater inlet connecting pipe, 3-initial rainwater bypass pipe, 4-rainwater main pipe, 5-valve well, 51-manual gate valve, 52-check valve, 53-electric gate valve, 6-water retaining plate, 61-joining piece, 62-water retaining plate, 63-limit block, 64-limiting part, 7-rainfall monitor, 8-control circuit, 9-transmission mechanism, 91-driving gear, 92-driven gear, 93-gear teeth, 94-reset spring, 95-umbrella gear, 96-blocking part, 10-well cover. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0032] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific contexts.

[0034] Example:

[0035] like Figure 1-8As shown, the present invention provides a rainwater collection system capable of treating and storing initial rainwater. The system comprises a rainwater inspection well 1, a rainwater inlet connecting pipe 2, an initial rainwater bypass pipe 3, a rainwater main pipe 4, and a valve well 5. The rainwater main pipe 4 is connected to the bottom of the rainwater inspection well 1. A water storage chamber 11 is provided within the rainwater inspection well 1. A water retaining plate 6 is also provided within the rainwater inspection well 1 to separate the rainwater main pipe 4 from the water storage chamber 11. When the water retaining plate 6 is inserted, a water outlet chamber is formed between the water retaining plate 6 and the wall of the rainwater inspection well 1. When the water retaining plate 6 is removed, the water storage chamber 11 communicates with the rainwater main pipe 4. The rainwater inlet connecting pipe 2 and the initial rainwater bypass pipe 3 are both connected to the water storage chamber 11. The rainwater inlet connecting pipe 2 is connected to a rainwater grate on the ground. The other end of the initial rainwater bypass pipe 3 is connected to the valve well 5. An electric gate valve 53 is provided within the valve well 5. The outlet end of the electric gate valve 53 is connected to the sewage treatment system.

[0036] The rainwater collection system of the present invention, which can realize the treatment and storage of initial rainwater, usually lowers the water baffle 6 so that the water baffle 6 separates the water storage chamber 11 from the rainwater main pipe 4. When it rains, the initial rainwater enters the rainwater outlet connecting pipe 2 through the rainwater grate on the ground, and then enters the inside of the water storage chamber 11. The rainwater inside the water storage chamber 11 enters the valve well 5 through the initial rainwater bypass pipe 3. At this time, the electric gate valve 53 in the valve well 5 opens, and then the rainwater is discharged to the sewage treatment plant for treatment. After it rains for a period of time, the electric gate valve 53 closes. At this time, the rainwater input by the rainwater outlet connecting pipe 2 overflows to the rainwater main pipe 4 through the top of the water baffle, and then the rainwater is discharged to the river or other water system through the rainwater main pipe 4. After the rain is over, lift the water baffle 6 to allow the rainwater in the water storage chamber 11 to completely flow into the rainwater main pipe 4 and be discharged. When the rainwater inspection well 1 is cleaned and inspected on a sunny day, the rainwater baffle 6 slides down along the baffle groove 12 to the inspection well flow channel, and the maintenance personnel enter for maintenance.

[0037] By controlling the opening and closing of the water retaining plate 6 and the electric gate valve 53, initial rainwater can be effectively intercepted and transported to the sewage treatment plant, preventing it from flowing directly into the water system and polluting the water quality. Later rainwater is discharged directly into the water system through the rainwater main 4. This simple structure can achieve the treatment and storage of initial rainwater, avoiding the construction of an overly large-scale drainage system.

[0038] In this embodiment, the electric gate valve 53 is electrically connected to the control unit. The control unit includes a rainfall monitor 7 and a control circuit 8. The rainfall monitor 7 is a common device on the market, and the control circuit 8 can be a common instrument on the market. The electric gate valve 53 and the rainfall monitor 7 are both connected to the control circuit 8. The rainfall monitor 7 monitors whether it is currently raining and transmits the signal to the instrument. The instrument controls the opening and closing of the electric gate valve 53 after processing the signal. These control logics and the control circuit 8 are well known to the public and will not be described in detail here. The logic of the control circuit 8 controlling the opening and closing of the electric gate valve 53 based on the monitoring signal of the rainfall monitor 7 is that the electric gate valve 53 opens after detecting rainfall, and then discharges the discharged rainwater to the sewage treatment plant. The electric gate valve 53 closes after being open for 15-30 minutes, so that the subsequent rainwater is directly discharged into the water system through the rainwater main 4. Generally speaking, the initial rainwater is within 15-30 minutes after the beginning of rainfall.

[0039] The cooperation of the rainfall monitor 7 and the control circuit 8 can make the collection of the initial rainwater automatically carried out without the need for excessive human intervention.

[0040] In this embodiment, a rainwater inspection well 1 is provided with a water storage chamber 11 and a water retaining plate 6 on opposite sides. Each water storage chamber 11 is connected to a rainwater outlet connecting pipe 2 and an initial rainwater bypass pipe 3. This allows a single rainwater inspection well 1 to handle rainwater from two ground-level rainwater grates. In practice, multiple sets of rainwater outlet connecting pipes 2 can be connected to a single water storage chamber 11 as needed, allowing it to handle rainwater from even more ground-level rainwater grates.

[0041] In this embodiment, each valve well 5 corresponds to several rainwater inspection wells 1. The initial rainwater bypass pipe 3 and the rainwater main pipe 4 of the upstream rainwater inspection well 1 are connected to the initial rainwater bypass pipe 3 and the rainwater main pipe 4 of the downstream rainwater inspection well 1. The initial rainwater bypass pipe 3 of the most downstream rainwater inspection well 1 is connected to the electric gate valve 53. The rainwater main pipe 4 of the most downstream rainwater inspection well 1 is connected to the downstream rainwater well. This allows several rainwater inspection wells 1 to be connected in series. The initial rainwater of several rainwater inspection wells 1 is collected uniformly and then passes through the valve well 5, so that one valve well 5 can correspond to multiple rainwater inspection wells 1.

[0042] In this embodiment, a manual gate valve 51 and a check valve 52 are also installed in the valve well 5. The check valve 52 and the manual gate valve 51 are connected upstream of the electric gate valve 53. A manual gate valve 51 is also installed downstream of the electric gate valve 53. When inspecting the valve well 5, personnel manually close the manual gate valve 51, isolating the water supply from the pipeline and facilitating maintenance. The check valve installed in the valve well 5 prevents sewage from flowing back into the initial rainwater bypass pipe 3, causing rainwater and sewage mixing and polluting the water environment.

[0043] In this embodiment, water baffle grooves 12 are provided on two opposite inner walls of the rainwater inspection well 1. The water baffle 6 is plugged into a water baffle groove 12 on each side and can slide up and down along the water baffle groove 12. The water baffle groove 12 restricts the water baffle 6, thereby ensuring its sealing stability to the water storage chamber 11, and also making the lifting process of the water baffle 6 more stable. A reel 13 for winding the water baffle 6 is also provided inside the rainwater inspection well 1. The water baffle 6 can be rolled up by rotating the reel 13, thereby opening the water baffle 6. A control disk 14 for controlling the rotation of the reel 13 is also provided inside the rainwater inspection well 1.

[0044] In this embodiment, the water retaining plate 6 includes a plurality of splicing pieces 61 and a water retaining piece 62. Figure 8 As shown, several splicing pieces 61 are spliced ​​into a plate shape. Two adjacent splicing pieces 61 are hinged. In practice, the connection structure of the splicing pieces 61 is similar to the structure of a chain. The splicing pieces 61 are provided with a limit block 63 and a limit portion 64. The limit blocks 63 and the limit portions 64 of two adjacent splicing pieces 61 are arranged in a coordinated manner so that when the two adjacent splicing pieces 61 rotate in one direction until the limit blocks 63 and the limit portions 64 abut against each other, the limit blocks 63 and the limit portions 64 prevent the two adjacent splicing pieces 61 from continuing to rotate. Several splicing pieces 61 in the figure can bend significantly toward one side of the reel 13 but cannot bend significantly toward the other side. When two adjacent splicing pieces 61 stop rotating, the two are located in the same plane. The stop direction of each set of limit blocks 63 and limit portions 64 is the same, so that one side of several splicing pieces 61 can be bent into an inward concave surface. The water retaining plate 62 is arranged on one side of the bent inward concave surface of several splicing pieces 61. The water retaining plate 62 can be made of a flexible material such as silicone, which is bendable and elastic. A drive tooth is provided on the side of the splicing plate 61 away from the water retaining plate 62. A transmission gear 15 is provided within the rainwater inspection well 1 to cooperate with the drive tooth. Rotation of the transmission gear 15 pushes the splicing plate 61 into the water retaining plate groove 12.

[0045] To retract the water baffle 62, the reel 13 rotates to retract. Due to the connection mechanism of the splicing piece 61, when the reel 13 reverses, the splicing piece 61 does not slide into the water baffle groove 12 due to the thrust of the reel 13. At this time, the driving gear 15 is required to push the splicing pieces 61 into the water baffle groove 12 one by one. The wall of the water baffle groove 12 opposite the driving gear 15 blocks the splicing piece 61 from bending toward the wall, thereby ensuring the stability of the connection between the driving gear 15 and the splicing piece 61.

[0046] In this embodiment, the control disk 14 is also provided with a transmission mechanism 9. The transmission mechanism 9 is provided with a driving gear 91 at one end away from the control disk 14. Figure 3 As shown, the transmission mechanism 9 uses a plurality of bevel gears 95 to drive the driving gear 91. The rotating shaft of the reel 13 and the rotating shaft of the transmission gear 15 are both provided with a driven gear 92 meshing with the driving gear 91. Figure 6 As shown, the teeth 93 of the driven gear 92 are hingedly connected to the main body of the driven gear 92. The main body of the driven gear 92 is provided with a blocking portion 96 that prevents the teeth 93 from rotating in the same direction, thereby ensuring that the teeth 93 of the driven gear 92 can only swing in the same direction. A return spring 94 is also provided between the teeth 93 and the main body of the driven gear 92 to reset the teeth 93 after the teeth 93 lose their swinging thrust. The teeth 93 of the two driven gears 92 are arranged to swing in opposite directions.

[0047] This means that when the driving gear 91 rotates, it can only drive one of the reel 13 or the transmission gear 15 to rotate, and then the forward and reverse rotation of a control disk 14 can control the lifting of the water baffle 6, which is practical and convenient.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A rainwater collection system capable of processing and storing initial rainwater, characterized by: The invention comprises a rainwater inspection well (1), a rainwater outlet connecting pipe (2), an initial rainwater bypass pipe (3), a rainwater main pipe (4) and a valve well (5); the rainwater main pipe (4) is connected to the bottom of the rainwater inspection well (1); a water storage chamber (11) is provided in the rainwater inspection well (1); a water baffle (6) is also provided in the rainwater inspection well (1) for isolating the rainwater main pipe (4) and the water storage chamber (11); when the water baffle (6) is opened, the water storage chamber (11) is communicated with the rainwater main pipe (4); the rainwater outlet connecting pipe (2) and the initial rainwater bypass pipe (3) are both connected to the water storage chamber (11); the other end of the initial rainwater bypass pipe (3) is connected to the valve well (5); an electric gate valve (53) is provided in the valve well (5); the water outlet end of the electric gate valve (53) is connected to the sewage treatment system; Water baffle grooves (12) are provided on two opposite inner walls of the rainwater inspection well (1); the two sides of the water baffle (6) are respectively plugged into one of the water baffle grooves (12) and can slide up and down along the water baffle grooves (12); a reel (13) for winding the water baffle (6) is also provided inside the rainwater inspection well (1); a control disk (14) for controlling the rotation of the reel (13) is also provided inside the rainwater inspection well (1); The water baffle (6) comprises a plurality of splicing pieces (61) and a water baffle (62); the plurality of splicing pieces (61) are spliced ​​into a plate shape; two adjacent splicing pieces (61) are hinged; the splicing piece (61) is provided with a limiting block (63) and a limiting portion (64); the limiting blocks (63) and the limiting portions (64) of the two adjacent splicing pieces (61) are arranged in a coordinated manner so that the two adjacent splicing pieces (61) rotate in one direction to the limiting block (63). When the limiting block (63) and the limiting portion (64) abut against each other, the limiting block (63) and the limiting portion (64) prevent the two adjacent splicing pieces (61) from continuing to rotate; when the two adjacent splicing pieces (61) stop rotating, the two are located in the same plane; the stopping direction of each set of limiting blocks (63) and the limiting portion (64) is the same, so that one side of the plurality of splicing pieces (61) can be bent into an inner concave surface; the water retaining piece (62) is arranged on one side of the bent inner concave surface of the plurality of splicing pieces (61); A driving tooth is provided on the side of the splicing piece (61) away from the water retaining plate (62); a transmission gear (15) is provided inside the rainwater inspection well (1) to cooperate with the driving tooth, so that the rotation of the transmission gear (15) can push the splicing piece (61) into the water retaining plate groove (12); The control disk (14) is also provided with a transmission mechanism (9); a driving gear (91) is provided at one end of the transmission mechanism (9) away from the control disk (14); the rotating shaft of the reel (13) and the rotating shaft of the transmission gear (15) are both provided with a driven gear (92) meshed with the driving gear (91); the gear teeth (93) of the driven gear (92) are hinged to the main body of the driven gear (92); the main body of the driven gear (92) is provided with a blocking portion (96) for blocking the gear teeth (93) from rotating in the same direction, so that the gear teeth (93) of the driven gear (92) can only swing in the same direction; the gear teeth (93) of the two driven gears (92) are arranged to swing in opposite directions; A reset spring (94) is also provided between the gear teeth (93) and the driven gear (92) body so as to reset the gear teeth (93) after the gear teeth (93) lose the swing thrust.

2. The rainwater collection system capable of realizing initial rainwater treatment and storage according to claim 1 is characterized in that: The electric gate valve (53) is electrically connected to a control unit; the control unit comprises a rainfall monitor (7) and a control circuit (8); the electric gate valve (53) and the rainfall monitor (7) are both connected to the control circuit (8); the control circuit (8) controls the opening and closing of the electric gate valve (53) according to a monitoring signal from the rainfall monitor (7).

3. The rainwater collection system capable of realizing initial rainwater treatment and storage according to claim 2, characterized in that: A water storage chamber (11) and a water baffle (6) are respectively provided on two opposite sides of the rainwater inspection well (1); each of the water storage chambers (11) is connected to a rainwater inlet connecting pipe (2) and an initial rainwater bypass pipe (3).

4. The rainwater collection system capable of realizing initial rainwater treatment and storage according to claim 3 is characterized in that: Each valve well (5) corresponds to a plurality of rainwater inspection wells (1); the initial rainwater bypass pipe (3) and the rainwater main pipe (4) of the upstream rainwater inspection well (1) are connected to the initial rainwater bypass pipe (3) and the rainwater main pipe (4) of the downstream rainwater inspection well (1); the initial rainwater bypass pipe (3) of the most downstream rainwater inspection well (1) is connected to the electric gate valve (53); and the rainwater main pipe (4) of the most downstream rainwater inspection well (1) is connected to the downstream rainwater well.

5. The rainwater collection system capable of realizing initial rainwater treatment and storage according to claim 4 is characterized in that: A manual gate valve (51) and a check valve (52) are also provided in the valve well (5); the check valve (52) and the manual gate valve (51) are connected in sequence upstream of the electric gate valve (53); and a manual gate valve (51) is also provided downstream of the electric gate valve (53).

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