A rainwater collection system for expressway reconstruction and expansion construction period

Abstract

The application provides a highway reconstruction construction period rainwater collecting system, and belongs to the technical field of auxiliary equipment of building construction highway. The technical scheme is: including a water collecting pool, a drainage groove, a purification pool and a spraying device; the water collecting pool is installed in a groove on the ground, the water collecting pool includes a box body with an open upper end, and a filter screen is arranged around the upper end of the box body; the drainage groove is provided with a plurality of drainage grooves, and the plurality of drainage grooves are arranged around the water collecting pool and matched with the filter screen. The application has the beneficial effects that: the water collecting pool, the purification pool and the spraying device are used to collect rainwater, especially the collection of silt, the cooperation of the collecting disc and the sand falling groove improves the collection effect. In addition, the sand falling grooves are arranged according to certain rules and have different depths, so that water and part of the silt are concentrated into the deepest sand falling groove as much as possible, and the utilization rate of water and the cleaning effect of silt are improved.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment technology for highway construction, and in particular to a rainwater harvesting system for highway reconstruction and expansion. Background Technology

[0002] Currently, during the reconstruction and expansion of highways, rainwater is often discharged directly through drainage ditches. If the rainwater could be collected, properly treated, and then used for spraying at the construction site, it would not only maintain the environment of the construction site and protect the health of the construction workers, but also save a lot of tap water resources. Therefore, this solution provides a rainwater collection system for the reconstruction and expansion of highways. Summary of the Invention

[0003] The purpose of this invention is to provide a rainwater collection system for highway reconstruction and expansion construction that can collect and treat rainwater to enable rainwater spraying and dust suppression at construction sites.

[0004] This invention is achieved through the following measures:

[0005] A rainwater collection system for highway reconstruction and expansion construction is characterized by comprising a water collection tank, a drainage ditch used in conjunction with the water collection tank, a purification tank connected to the water collection tank via a first pipeline, and a spray device connected to the purification tank via a second pipeline.

[0006] The water collection tank is installed in a groove in the ground. The water collection tank includes a box with an open top and a filter screen is provided around the upper periphery of the box.

[0007] The drainage channel is provided in several ways. The drainage channel is arranged around the water collection pool and cooperates with the filter screen. The water in the drainage channel flows into the water collection pool through the filter screen. Impurities in the drainage channel are intercepted by the filter screen and can then be cleaned manually.

[0008] The invention also has the following specific features:

[0009] The water collection tank also includes a waste collection mechanism;

[0010] The waste collection mechanism includes a base mounted on the outer surface of the upper end of the container, a support frame mounted on the base, and an installation frame extending into the container on the support frame. The installation frame includes a horizontally arranged main shaft, with several sets of downward-extending intermediate shafts vertically arranged on the main shaft. Each set of intermediate shafts has a horizontal shaft at its lower end, and several sets of rotating shafts are evenly arranged vertically through the sets of horizontal shafts. Filter plates are arranged around the rotating shafts, specifically in the middle of the filter plates. The waste collection mechanism is used to collect waste floating on the water surface or debris that has fallen into the water. Since it is unavoidable for waste to fall into the water tank during use, the design of a waste collection mechanism is necessary. Initially, all filter plates are spread out and submerged in the water inside the container, covering the entire cross-section of the container, collecting waste from the water surface upwards. After the waste is collected, the filter plates rotate to a vertical position, as a vertical position makes it easier to enter the water inside the container and prevents newly fallen waste from being pushed underwater.

[0011] The support frame includes a vertical rod rotatably mounted on the base. A sliding groove is provided on the side of the vertical rod. A lead screw is rotatably mounted between the upper and lower end faces of the sliding groove. A lead screw slider is provided around the lead screw and cooperates with the sliding groove. A horizontal rod is provided on the lead screw slider. The horizontal rod is parallel to the rotating shaft. A lower extension rod is provided on the lower side of the horizontal rod near the free end. The lower end of the lower extension rod is fixed on the main shaft.

[0012] A motor is installed at the upper end of the vertical rod. The upper end of the lead screw passes through the upper end face of the vertical rod and is mounted on the output shaft of the motor. The motor drives the lead screw to rotate, thereby moving the horizontal rod up and down, which can bring the filter plate out of the box. A handle is installed on the vertical rod. By rotating the vertical rod with the handle, the filter plate is rotated to one side for cleaning.

[0013] A through mounting groove is provided on the end face of one side of the horizontal shaft. A sprocket is provided on the periphery of several rotating shafts located in the mounting groove. The several sprockets are connected by a chain. A corresponding limiting block is provided on both sides of the chain. The limiting block is fixed in the mounting groove to maintain the meshing of the chain and the sprocket and prevent it from falling off.

[0014] A gear is provided on the periphery of the shaft end located below the horizontal rod. A lower vertical rod is provided on the lower side of the horizontal rod. A second sliding groove is provided on the corresponding side of the lower vertical rod. A second lead screw is rotatably arranged between the upper and lower end faces of the second sliding groove. A second lead screw slider is provided on the periphery of the second lead screw, which cooperates with the second sliding groove. A rack is provided on the second lead screw slider, which meshes with the gear. Limiting plates are provided at the upper and lower ends of the rack, which cooperate with the gear. When the gear contacts the upper limiting plate, the filter plate is in a vertical state. When the gear contacts the lower limiting plate, the filter plate is in a horizontal state.

[0015] A second motor is installed on the upper side of the horizontal rod. The upper end of the second lead screw passes through the horizontal rod and is installed on the output shaft of the second motor. The second motor drives the second lead screw to rotate, thereby driving the rack to slide, thereby driving the gear to rotate. Then, through the sprocket and chain structure, all rotating shafts are driven to rotate, thereby simultaneously rotating the filter plate to a vertical state or a flat state.

[0016] The garbage collection mechanism is equipped with a sediment collection mechanism, which is located below several filter plates. Due to the construction environment at the highway site, rainwater washes into the collection pool through the drainage ditch, inevitably carrying sediment of various particle sizes. Large particles can be intercepted by the filter plates, but fine sediment will sink to the bottom of the collection pool, so it needs to be cleaned in time.

[0017] The sediment collection mechanism includes several sets of downwardly extending fixed rods arranged on several horizontal axes. The free end of each fixed rod is provided with a collection plate. Several sand drop troughs that cooperate with the collection plates are provided on the bottom surface of the box body. The collection plates are arranged in the corresponding sand drop troughs.

[0018] Nine sets of sand-falling troughs are evenly distributed on the bottom surface of the box body in a nine-square grid pattern. The outermost sand-falling trough on the diagonal is the deepest sand-falling trough. The three sand-falling troughs adjacent to the deepest sand-falling trough are the second deepest sand-falling troughs. The five sand-falling troughs adjacent to the three second deepest sand-falling troughs are the next deepest sand-falling troughs. The depth of the deepest sand-falling trough is greater than the depth of the second deepest sand-falling trough, and the depth of the second deepest sand-falling trough is greater than the next deepest sand-falling trough.

[0019] Each of the three sub-deep sand-falling troughs has a slanted hole 1 on its inner bottom surface, which connects to the deepest sand-falling trough. The sub-second-deep sand-falling troughs located diagonally opposite to the deepest sand-falling trough and the two adjacent sub-second-deep sand-falling troughs each have a slanted hole 2 on their inner bottom surfaces, which connects to the sub-deep sand-falling trough located at the center of the nine-square grid. The remaining two sub-second-deep sand-falling troughs are connected to the two corresponding sub-deep sand-falling troughs adjacent to the sub-deep sand-falling trough located at the center of the nine-square grid through slanted holes 3 on their inner bottom surfaces.

[0020] The collection trays that cooperate with the sand troughs are also provided in nine sets and are evenly distributed in a nine-square grid. The height of the nine sets of collection trays corresponds to the depth of the nine sets of sand troughs. That is, after the mud and sand collection mechanism extends into the box, the lower side of the collection trays abuts against the bottom surface of the corresponding sand trough, which facilitates the collection of mud and sand.

[0021] Since the collection pools are often quite large, using a single mud and sand collection tray would be unsatisfactory, and simply digging by hand would be time-consuming and labor-intensive. Therefore, several collection trays were designed, and sand drop troughs were used in conjunction to improve the collection efficiency.

[0022] In addition, the sand troughs have different depths and are arranged in a certain pattern. The design of the inclined slot hole one, the inclined slot hole two, and the inclined slot hole three allows water and some of the silt to be concentrated in the deepest sand trough as much as possible. Especially when the water volume is low, the water concentrated in the deepest sand trough is easier to use, and the silt concentrated in the deepest sand trough is also easier to clean.

[0023] The lowest edges of the inclined slot hole one, the inclined slot hole two, and the inclined slot hole three are all higher than the highest edge of the corresponding collection tray, ensuring that water and sediment flowing in from the adjacent sediment trough can smoothly enter the corresponding collection tray, which is conducive to the smooth collection of sediment.

[0024] The bottom surface of the box is provided with a convex inclined surface structure that cooperates with the sand drop trough, so that the mud and sand in the water fall into the sand drop trough as much as possible, making it easy to collect.

[0025] A water pump is installed in the deepest sand trough to transport rainwater to the purification pool.

[0026] The operating principle is as follows: Rainwater enters the tank after passing through a drainage channel and a filter screen. Initially, the filter plate is horizontal within the tank. When it is necessary to clean up garbage and sediment, motor one is activated to move the filter plate and collection tray upwards and away from the tank. Then, by rotating the vertical rod with a handle, the filter plate and collection tray are rotated to the outside of the tank for cleaning. When the filter plate and collection tray are put back into the tank, motor two first moves the filter plate vertically before placing it into the tank, and finally, motor two again levels the filter plate. A water pump delivers water through a first pipeline to a purification tank higher than the collection tank, and then sprays it through a sprinkler system. The purified rainwater can be automatically sprayed mostly by gravity, thus saving energy and reducing operating costs.

[0027] The beneficial effects of this invention are as follows: This solution achieves the collection of rainwater, especially the collection of sediment, through the setting of a water collection tank, a purification tank and a spray device. The combination of the collection tray and the sediment trough improves the collection effect.

[0028] In addition, the sand-falling troughs are arranged at different depths according to a certain pattern, so that water and some of the silt are concentrated in the deepest sand-falling trough, which improves the utilization rate of water and the cleaning effect of silt. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the water collection tank in an embodiment of the present invention.

[0030] Figure 2 This is a schematic diagram of the mounting frame, filter plate, and collection tray in an embodiment of the present invention.

[0031] Figure 3 for Figure 2 A magnified view of A in the middle.

[0032] Figure 4 This is a schematic diagram of the filter plate in a vertical position in an embodiment of the present invention.

[0033] Figure 5 This is a schematic diagram of the sand-falling trough structure on the bottom surface of the box body in an embodiment of the present invention.

[0034] The attached diagram is labeled as follows: 1. Box body; 2. Filter screen; 3. Vertical rod; 4. Lead screw one; 5. Motor one; 6. Horizontal rod; 7. Lower extension rod; 8. Filter plate; 9. Rotating shaft; 10. Horizontal shaft; 11. Lower vertical rod; 12. Motor two; 14. Main shaft; 15. Intermediate shaft; 16. Fixed rod; 17. Collection tray; 18. Rack; 19. Gear; 20. Limiting plate; 21. Deepest sand drop trough; 22. Second deepest sand drop trough; 23. Sub-sub-deepest sand drop trough; 24. Inclined slot hole one; 25. Inclined slot hole two; 26. Inclined slot hole three; 27. Convex inclined surface structure. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0039] See Figures 1-5 A rainwater collection system for highway reconstruction and expansion includes a water collection tank, a drainage ditch used in conjunction with the water collection tank, a purification tank connected to the water collection tank via a first pipeline, and a spray device connected to the purification tank via a second pipeline.

[0040] The water collection tank is installed in a groove on the ground. The water collection tank includes a box 1 with an open top, and a filter screen 2 is provided around the upper periphery of the box 1.

[0041] Several drainage channels are provided, which are set around the water collection pool and cooperate with the filter screen 2. The water in the drainage channel flows into the water collection pool through the filter screen 2. Impurities in the drainage channel are intercepted by the filter screen 2 and can be cleaned manually or by other means.

[0042] The water collection pool also includes a waste collection facility;

[0043] The garbage collection mechanism includes a base set on the outer side of the upper end of the container 1, a support frame set on the base, and an installation frame set on the support frame that extends into the container 1. The installation frame includes a horizontally arranged main shaft 14, and several sets of intermediate shafts 15 extending downwards are vertically arranged on the main shaft 14. Each set of intermediate shafts 15 has a horizontal shaft 10 at its lower end. Several sets of rotating shafts 9 are evenly arranged vertically through the sets of horizontal shafts 10. Filter plates 8 are arranged around the rotating shafts 9. Specifically, the rotating shafts 9 are located in the middle of the filter plates 8. The garbage collection mechanism is used to collect garbage floating on the water surface or debris that has fallen into the water. Since it is impossible to avoid garbage falling into the water collection tank during use, it is necessary to design a garbage collection mechanism. Initially, all filter plates 8 are spread out and submerged in the water inside the container 1, covering the entire cross-section of the container 1, collecting garbage on the water surface upwards. After cleaning the garbage, the filter plates 8 rotate to a vertical position, because the vertical position makes it easier to enter the water inside the container 1 and will not push newly fallen garbage underwater.

[0044] The support frame includes a vertical rod 3 rotatably mounted on the base. A sliding groove is provided on the side of the vertical rod 3. A lead screw 4 is rotatably mounted between the upper and lower end faces of the sliding groove. A lead screw slider 1 that cooperates with the sliding groove is provided around the lead screw 4. A horizontal rod 6 is provided on the lead screw slider 1. The horizontal rod 6 is parallel to the rotating shaft 9. A lower extension rod 7 is provided on the lower side of the horizontal rod 6 near the free end. The lower end of the lower extension rod 7 is fixed on the main shaft 14.

[0045] A motor 5 is installed at the upper end of the vertical rod 3. The upper end of the lead screw 4 passes through the upper end face of the vertical rod 3 and is mounted on the output shaft of the motor 5. The motor 5 drives the lead screw 4 to rotate, thereby driving the horizontal rod 6 to move up and down, so as to carry the filter plate 8 out of the box 1. A handle is installed on the vertical rod 3. By rotating the vertical rod 3 with the handle, the filter plate 8 is rotated to one side for cleaning.

[0046] A through mounting groove is provided on the end face of one side of the horizontal shaft 10. A sprocket is provided on the periphery of several rotating shafts 9 within the mounting groove. The sprockets are connected by a chain. A corresponding limiting block is provided on both sides of the chain. The limiting block is fixed in the mounting groove to maintain the meshing of the chain and the sprocket and prevent them from falling off.

[0047] A gear 19 is provided on the outer periphery of the end of the rotating shaft 9 located below the horizontal rod 6. A lower vertical rod 11 is provided on the lower side of the horizontal rod 6. A sliding groove 2 is provided on the corresponding side of the lower vertical rod 11. A lead screw 2 is rotatably arranged between the upper and lower end faces of the sliding groove 2. A lead screw slider 2 that cooperates with the sliding groove 2 is provided on the outer periphery of the lead screw 2. A rack 18 that meshes with the gear 19 is provided on the lead screw slider 2. A limiting plate 20 that cooperates with the gear 19 is provided at both the upper and lower ends of the rack 18. When the gear 19 contacts the upper limiting plate 20, the filter plate 8 is in a vertical state. When the gear 19 contacts the lower limiting plate 20, the filter plate 8 is in a horizontal state.

[0048] A motor 12 is installed on the upper side of the horizontal rod 6. The upper end of the lead screw 1 passes through the horizontal rod 6 and is installed on the output shaft of the motor 12. The motor 12 drives the lead screw 1 to rotate, which in turn drives the rack 18 to slide, which in turn drives the gear 19 to rotate. Then, through the sprocket and chain structure, all the rotating shafts 9 are driven to rotate, thereby simultaneously rotating the filter plate to a vertical or flat state.

[0049] The garbage collection system is equipped with a sediment collection system, which is located below several filter plates 8. Due to the construction environment at the highway site, rainwater washes into the collection pool through the drainage ditch, inevitably carrying sediment of various particle sizes. Large particles can be intercepted by the filter plates 8, but fine sediment will sink to the bottom of the collection pool, so it needs to be cleaned in time.

[0050] The sediment collection mechanism includes several sets of downwardly extending fixed rods 16 arranged on several horizontal axes 10. The free ends of the fixed rods 16 are provided with collection trays 17. Several sand drop troughs that cooperate with the collection trays 17 are provided on the bottom surface of the box body 1. The collection trays 17 are arranged in the corresponding sand drop troughs.

[0051] Nine sets of sand troughs are evenly distributed in a 3x3 grid on the bottom surface of the box 1. The outermost sand trough on the diagonal is the deepest sand trough 21. The three sand troughs adjacent to the deepest sand trough 21 are the second deepest sand troughs 22. The five sand troughs adjacent to the three second deepest sand troughs 22 are the next deepest sand troughs 23. The depth of the deepest sand trough 21 is greater than the depth of the second deepest sand trough 22. The depth of the second deepest sand trough 22 is greater than the depth of the next deepest sand trough 23.

[0052] The inner bottom surfaces of the three secondary deep sand-falling troughs 22 are all provided with inclined slot holes 1 24 connecting to the deepest sand-falling trough 21. The inner bottom surfaces of the secondary deep sand-falling trough 23, which is diagonally opposite to the deepest sand-falling trough 21, and the two adjacent secondary deep sand-falling troughs 23 are all provided with inclined slot holes 25 connecting to the secondary deep sand-falling trough 22 located at the center of the nine-square grid. The inner bottom surfaces of the remaining two secondary deep sand-falling troughs 23 are respectively connected to the two corresponding secondary deep sand-falling troughs 22 adjacent to the secondary deep sand-falling trough 22 at the center of the nine-square grid through inclined slot holes 3 26.

[0053] Nine sets of collection trays 17 are also provided in conjunction with the sand troughs and are evenly distributed in a nine-square grid. The height of the nine sets of collection trays 17 corresponds to the depth of the nine sets of corresponding sand troughs. That is, after the sand collection mechanism extends down into the box 1, the lower side of the collection trays 17 abuts against the bottom surface of the corresponding sand trough, which facilitates the collection of sand.

[0054] Since the collection pools are often large in size, it would be very unsatisfactory to use a whole mud and sand collection tray 17 for collection, and it is time-consuming and labor-intensive to simply dig it manually. Therefore, several collection trays 17 were designed, and sand drop troughs were used in conjunction to improve the collection effect.

[0055] In addition, the sand troughs are arranged at different depths according to a certain pattern. The design of inclined slot holes 1 24, inclined slot hole 25, and inclined slot hole 3 26 ensures that water and some of the silt are concentrated in the deepest sand trough 21. Especially when the water volume is low, the water concentrated in the deepest sand trough 21 is easier to use, and the silt concentrated in the deepest sand trough 21 is also easier to clean.

[0056] The lowest edges of inclined slot holes 1 24, inclined slot holes 25 and inclined slot holes 3 26 are all higher than the highest edge of the corresponding collection tray 17, ensuring that water and sediment flowing in from the adjacent sediment trough can smoothly enter the corresponding collection tray 17, which is conducive to the smooth collection of sediment.

[0057] The bottom surface of the inner side of the container 1 is provided with a convex inclined surface structure 27 that cooperates with the sand drop trough, so that the mud and sand in the water fall into the sand drop trough as much as possible, making it easy to collect.

[0058] The deepest sand trough 21 is equipped with a water pump that transports rainwater to the purification pool.

[0059] The operating principle is as follows: Rainwater enters the housing 1 after passing through the drainage channel and the filter screen 2. Initially, the filter plate 8 is horizontal inside the housing 1. When it is necessary to clean up garbage and silt, the motor 5 is started to move the filter plate 8 and the collection tray 17 upwards and away from the housing 1. Then, the vertical rod 3 is rotated by the handle to rotate the filter plate 8 and the collection tray 17 to the outside of the housing 1 for cleaning up garbage and silt. When the filter plate 8 and the collection tray 17 are put back into the housing 1, the motor 12 is used to make the filter plate 8 vertical before placing it into the housing 1. Finally, the motor 12 is used to level the filter plate 8. The water pump delivers water through the first pipeline to the purification tank, which is higher than the collection tank. Then, it is sprayed by the spraying device. The purified rainwater can be automatically sprayed by gravity, thus saving energy and reducing operating costs.

[0060] The technical features of this invention not described can be implemented by or using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this invention, and this invention is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention should also be within the protection scope of this invention.

Claims

1. A rainwater harvesting system for the construction period of a highway reconstruction and expansion project, characterized in that, It includes a water collection tank, a drainage ditch used in conjunction with the water collection tank, a purification tank connected to the water collection tank via a first pipeline, and a spray device connected to the purification tank via a second pipeline. The water collection tank is installed in a groove on the ground. The water collection tank includes a box (1) with an open top. A filter screen (2) is provided around the upper periphery of the box (1). The drainage channel is provided in several ways, and the drainage channel is arranged around the water collection pool and cooperates with the filter screen (2); The water collection tank also includes a waste collection mechanism; The garbage collection mechanism includes a base set on the outer side of the upper end of the container (1), a support frame set on the base, and an installation frame set on the support frame that extends into the container (1). The installation frame includes a horizontally arranged main shaft (14), and several sets of intermediate shafts (15) extending downwards are vertically arranged on the main shaft (14). A horizontal shaft (10) is set at the lower end of each set of intermediate shafts (15). Several sets of rotating shafts (9) are evenly arranged vertically through the several sets of horizontal shafts (10). A filter plate (8) is set around the rotating shaft (9). The waste collection mechanism is equipped with a sediment collection mechanism, which is located below several of the filter plates (8); The sediment collection mechanism includes several sets of downwardly extending fixed rods (16) arranged on several horizontal shafts (10), and a collection plate (17) is provided at the free end of the fixed rod (16). Several sand drop troughs that cooperate with the collection plate (17) are provided on the bottom surface of the box (1). The collection plate (17) is arranged in the corresponding sand drop trough. Nine sets of sand-falling troughs are evenly distributed in a 3x3 grid on the bottom surface of the box (1). The outermost sand-falling trough on the diagonal is the deepest sand-falling trough (21). The three sand-falling troughs adjacent to the deepest sand-falling trough (21) are the second deepest sand-falling troughs (22). The five sand-falling troughs adjacent to the three second deepest sand-falling troughs (22) are the next deepest sand-falling troughs (23). The depth of the deepest sand-falling trough (21) is greater than the depth of the second deepest sand-falling trough (22). The depth of the second deepest sand-falling trough (22) is greater than the depth of the next deepest sand-falling trough (23). Each of the three sub-deep sand-falling troughs (22) has a slanted slot hole 1 (24) on its inner bottom surface, which connects to the deepest sand-falling trough (21). The sub-deepest sand-falling trough (23) located diagonally opposite to the deepest sand-falling trough (21) and the two adjacent sub-deepest sand-falling troughs (23) have slanted slot holes 2 (25) on their inner bottom surfaces, which connect to the sub-deepest sand-falling trough (22) located at the center of the nine-square grid. The remaining two sub-deepest sand-falling troughs (23) are connected to the two corresponding sub-deepest sand-falling troughs (22) adjacent to the sub-deepest sand-falling trough (22) located at the center of the nine-square grid through slanted slot holes 3 (26). The collection trays (17) that cooperate with the sand trough are also provided in nine sets and are evenly distributed in a nine-square grid. The height of the nine sets of collection trays (17) corresponds to the depth of the nine sets of corresponding sand troughs. The lowest edges of the first inclined slot (24), the second inclined slot (25), and the third inclined slot (26) are all higher than the highest edge of the corresponding collection tray (17).

2. The rainwater harvesting system for highway reconstruction and expansion construction as described in claim 1, characterized in that, The support frame includes a vertical rod (3) rotatably mounted on the base. A sliding groove is provided on the side of the vertical rod (3). A lead screw (4) is rotatably mounted between the upper and lower end faces of the sliding groove. A lead screw slider is provided around the lead screw (4) and cooperates with the sliding groove. A horizontal rod (6) is provided on the lead screw slider. The horizontal rod (6) is parallel to the rotating shaft (9). A lower extension rod (7) is provided on the lower side of the horizontal rod (6) near the free end. The lower end of the lower extension rod (7) is fixed on the main shaft (14). The upper end of the vertical rod (3) is provided with a motor (5), and the upper end of the lead screw (4) passes through the upper end face of the vertical rod (3) and is set on the output shaft of the motor (5).

3. The rainwater harvesting system for highway reconstruction and expansion construction as described in claim 2, characterized in that, A through mounting groove is provided on the end face of one side of the horizontal shaft (10), and sprockets are provided on the periphery of several rotating shafts (9) located in the mounting groove, and the several sprockets are connected by a chain. A gear (19) is provided on the periphery of the end of the rotating shaft (9) located below the horizontal rod (6). A lower vertical rod (11) is provided on the lower side of the horizontal rod (6). A sliding groove is provided on the corresponding side of the lower vertical rod (11). A lead screw is rotatably provided between the upper and lower end faces of the sliding groove. A lead screw slider is provided on the periphery of the lead screw and cooperates with the sliding groove. A rack (18) is provided on the lead screw slider and meshes with the gear (19). A limiting plate (20) is provided at both the upper and lower ends of the rack (18) to cooperate with the gear (19). A second motor (12) is provided on the upper side of the horizontal rod (6), and the upper end of the second lead screw passes through the horizontal rod (6) and is set on the output shaft of the second motor (12).

4. The rainwater harvesting system for highway reconstruction and expansion construction as described in claim 3, characterized in that, The bottom surface of the box (1) is provided with a convex inclined surface structure (27) that cooperates with the sand drop trough.

5. The rainwater harvesting system for highway reconstruction and expansion construction as described in claim 4, characterized in that, The deepest sand trough (21) is equipped with a water pump that transports rainwater to the purification pool.

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