Viaduct rainwater collection and utilization system applied to sponge city

Abstract

The invention discloses a viaduct rainwater collection and utilization system applied to a sponge city, the viaduct rainwater collection and utilization system comprises a rainwater collection device, a water storage cylinder and a water storage tank, the rainwater collection device comprises two mounting plates, the mounting plates are slidably provided with collection half boxes, and a telescopic folding part is arranged between the two collection half boxes; a desilting part is arranged at the bottom of the collecting half box, a driving motor is arranged at the outer end of the desilting part, the output end of the driving motor is connected with a spiral rod, and one side of the collecting half box communicates with the water storage barrel through a connecting pipe and a collecting pipe; rainwater is collected through the rainwater collecting device, meanwhile, a screw rod driven by a driving motor is arranged in the rainwater collecting device, sediment and gravel sediment in the rainwater collecting device are removed through the screw rod, and the situation that a water conveying pipe is blocked by sediment is avoided; rainwater is collected through the flower nursery, the rainwater collection and storage efficiency is improved, and meanwhile the storage and utilization efficiency of the rainwater is improved through the water storage tank and the water storage barrel.

Description

Technical Field

[0001] The invention relates to the field of energy conservation and environmental protection, and in particular to an elevated bridge rainwater collection and utilization system applied to sponge cities. Background Art

[0002] In the planning and construction of urban roads, in order to alleviate the increasingly congested traffic conditions, more and more viaducts are built, resulting in a relatively large elevated road surface area and a large catchment area. When it rains, a large amount of rainwater runoff will be collected on the elevated road surface. If the traditional rainwater quick drainage method is used, it will not only waste a lot of water resources, but also increase the burden on the urban drainage system. The maintenance of the green belt under the elevated road requires a lot of irrigation water.

[0003] At present, there are related technologies on the market that can collect rainwater on the viaduct through pipes and send rainwater to flower beds or green belts for irrigation. However, these technologies have the following problems when used: 1. Although some technologies can filter rainwater to prevent large volumes of garbage from entering the pipes, some fine particles of garbage such as dust and gravel will enter the pipes through the filtering device. After long-term accumulation, dust and gravel and other particulate matter will accumulate at the bends of the pipes, causing the pipes to be blocked and difficult to clear, so that rainwater cannot be smoothly transported to the flower beds; 2. Some existing viaduct rainwater collection devices can only collect rainwater on the viaduct and transport it to the flower beds next to the viaduct. It is difficult to store more rainwater with only rainwater on the viaduct, and the rainwater collection efficiency is low, resulting in insufficient rainwater collection and inability to effectively irrigate the flower beds. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a viaduct rainwater collection and utilization system for sponge cities. The viaduct rainwater collection and utilization system of the present invention solves the problems that the water pipes of the existing viaduct rainwater collection devices are easily blocked, the rainwater collection efficiency is low, and the flower garden cannot be effectively irrigated.

[0005] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0006] A rainwater collection and utilization system for an elevated bridge used in a sponge city, comprising a rainwater collection device installed at the bottom of a bridge expansion joint, a water storage cylinder arranged below the bridge expansion joint, and a water storage tank buried at the bottom of a flower bed;

[0007] The rainwater collection device comprises two mounting plates fixed on the two edges of the expansion joint of the bridge body, the inner ends of the mounting plates are provided with horizontal slide grooves, two correspondingly matched collecting half boxes are slidably installed in the slide grooves, the two collecting half boxes are sealed and connected by telescopic folding parts, a cylindrical dredging part is provided at the bottom of one of the collecting half boxes, a driving motor is provided at the outer end of the dredging part, the output end of the driving motor extends into the interior of the dredging part and is fixedly connected with a spiral rod, a sewage pipe is provided at the bottom of the dredging part, and a collecting pipe is connected to one side of the other collecting half box through a connecting pipe thread, and the collecting pipe is collected into the water storage cylinder;

[0008] A water pipe connected to the bottom of the water storage cylinder is provided at one end of the water storage tank, and a water-absorbing sponge is provided at the bottom of the flower bed. The water-absorbing sponge penetrates and extends into the inner bottom of the water storage tank. Soil is laid on the water-absorbing sponge in the flower bed, and drip pipes connected to the bottom of the water storage cylinder are dispersedly arranged on the soil. As a preferred embodiment, a plurality of holes are opened on the top of the water storage tank, and the water-absorbing sponge is divided into two parts. One part of the water-absorbing sponge is spread to the bottom of the soil in the flower bed, and the other part extends into the bottom of the water storage tank through the holes on the water storage tank. In this way, when it rains, excess water in the flower bed penetrates through the soil and flows into the water storage tank along the water-absorbing sponge for storage. When the flower bed is dry, the water-absorbing sponge is used to absorb the water in the water storage tank to provide water for the soil in the flower bed to keep it moist.

[0009] Preferably, the mounting plate is fixed to the bottom edge of the expansion joint of the bridge body by expansion bolts, and there are two slide grooves which are respectively opened at the opposite ends of the two mounting plates, the cross-section of the slide groove is a T-shaped structure, and the bottom and opposite ends of the slide groove respectively pass through the mounting plates; during specific use, the slider can be inserted into the interior of the slide groove from the inner end opening of the slide groove, and the slider can be moved inside the slide groove by sliding cooperation with the slide groove, thereby facilitating the installation of the rainwater collection device.

[0010] Preferably, a slider that slides with the slide groove is provided on the top of the collection half box, and the two collection half boxes and the telescopic folding part form a complete collection box located directly below the expansion joint of the bridge body. The telescopic folding part is a folding plastic structure. As a preferred embodiment, the telescopic folding parts are folded with each other like a bellows. Such an arrangement allows the telescopic folding parts to be flexibly elongated and contracted, thereby enabling the collection device to be installed under the expansion joints of bridge bodies of different widths, thereby expanding its scope of application.

[0011] Preferably, the collecting half box and the bottom of the dredging part are inclined structures, and the drainage pipe is located at the bottom of the dredging part. In this way, when the spiral rod stirs the silt, the silt will move along the spiral rod along the inclined collecting half box into the dredging part and be discharged smoothly through the drainage pipe.

[0012] Preferably, a positioning ring is provided inside the desilting part, and the spiral rod passes through the positioning ring. As a preferred embodiment, there is a cylindrical structure on the spiral rod, and no spiral blades are provided outside the cylindrical structure. The positioning ring is welded by two semi-ring structures, and the positioning ring is sleeved on the outside of the cylindrical structure. In this arrangement, the spiral rod is limited and fixed by the positioning ring, so that the spiral rod remains stable during rotation. At the same time, the length of the spiral rod is smaller than the internal width of the two collection half boxes when compressed. In this arrangement, the collection half boxes can be easily compressed and installed.

[0013] Preferably, a horizontal spring telescopic tube is arranged inside the two collecting half boxes, and the spring telescopic tube includes an outer tube and an inner rod respectively fixedly connected to the two collecting half boxes, a sealing ring is arranged at the inner end of the outer tube, the inner rod is inserted into the inner part of the outer tube through the sealing ring, and a limit block is arranged at the inner end of the inner rod, and a spring member is arranged between the limit block and the bottom of the outer tube. With such arrangement, when installing the rainwater collection device, the two collecting half boxes are squeezed inwardly, and the elastic force of the spring member is overcome to make the inner rod extend into the inner part of the outer tube until the sliders on the two collecting half boxes are installed in the slide groove on the installation plate, and then the squeezing is stopped, and the elasticity of the spring member is used to push the inner rod outwardly to move the inner rod toward the outer end of the outer tube, thereby expanding the two collecting half boxes to complete the installation of the rainwater collection device.

[0014] Preferably, a mesh plate made of plastic is provided inside the expansion joint of the bridge body. The mesh plate installed inside the expansion joint of the bridge body is used to filter rainwater to prevent large garbage from entering the rainwater collection device through the expansion joint of the bridge body and clogging the rainwater collection system. The mesh plate made of plastic has a certain deformation capacity and can adapt to the compression during the thermal expansion and contraction of the viaduct.

[0015] Preferably, a delivery pipe is provided at one end of the water tank, which makes it convenient to add nutrient solution and other substances into the water tank, thereby improving the growth conditions of flowers and plants in the flower bed; a vertical liquid level display bar is provided on the water storage cylinder, and the liquid level display bar is made of transparent glass. By providing the liquid level display bar, the water storage amount in the water storage cylinder can be clearly seen.

[0016] Preferably, the water supply pipe and the drip pipe are respectively provided with a first control valve and a second control valve at the ends near the water storage cylinder. By controlling the first control valve, it is convenient to control the flow of water from the water storage cylinder to the water tank, and by controlling the second control valve, it is convenient to control the amount of drip irrigation from the drip pipe to the flower bed.

[0017] Preferably, the inner top and inner bottom of the water tank are respectively provided with a first liquid level detector and a second liquid level detector. With such arrangement, when the water level in the water tank reaches below the second liquid level detector, the first control valve is opened to allow the water in the water storage cylinder to flow into the water tank, and when the water level in the water tank reaches the first liquid level detector, the first control valve is closed to stop the water storage cylinder from injecting water into the water tank.

[0018] The present invention provides a viaduct rainwater collection and utilization system applied to sponge cities, which has the following beneficial effects:

[0019] 1. The present invention arranges a rainwater collection device at the bottom of the expansion joint of the bridge body, filters the rainwater through a mesh plate, and collects the rainwater by using the rainwater collection device. At the same time, a spiral rod driven by a driving motor is arranged inside the rainwater collection device, and the spiral rod is used to remove the sediment and gravel inside the rainwater collection device to prevent the sediment from clogging the water pipe;

[0020] 2. The present invention not only collects rainwater on the viaduct through the rainwater collection device, but also arranges a water storage tank on the bottom plate of the flower bed. Since holes are opened on the top of the water storage tank, and water-absorbing sponges are laid on the holes and the bottom of the flower bed, the flower bed is used to collect rainwater when it rains. The rainwater in the flower bed penetrates through the soil in the flower bed and the water-absorbing sponge and is collected in the water storage tank, thereby improving the collection and storage efficiency of rainwater.

[0021] 3. The present invention utilizes the telescopic folding part to enable the two collecting half boxes to be compressed and stretched, so that the rainwater collecting device can be installed at the bottom of the expansion joint of the bridge body of different widths, thereby improving the application range of the device, and at the same time utilizing the water storage tank and the water storage cylinder to increase the rainwater reserve;

[0022] 4. The present invention lays a drip pipe on the flower bed, sets a water-absorbing sponge at the bottom of the flower bed, irrigates the flower bed with the drip pipe, recycles excess rainwater from the irrigation with the water-absorbing sponge, stores the rainwater in the water storage tank, and then uses the water-absorbing sponge to reversely absorb the rainwater in the water storage tank into the flower bed after the soil is dry, thereby providing moisture to the soil and improving the utilization efficiency of the collected rainwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 for Figure 1 A partial structural diagram of

[0025] Figure 3 is a schematic diagram of the appearance of a rainwater collection device of the present invention;

[0026] Figure 4 It is a schematic diagram of the internal structure of the rainwater collection device of the present invention;

[0027] Figure 5 It is a schematic diagram of laying the drip pipe in the flower bed of the present invention;

[0028] Figure 6 It is a schematic diagram of the installation of the water storage tank of the present invention.

[0029] In the figure:

[0030] 1. Bridge expansion joint; 2. Mounting plate; 201. Slide; 3. Collecting half box; 301. Sliding block; 4. Telescopic folding part; 5. Connecting pipe; 6. Collecting pipe; 7. Desilting part; 8. Screw rod; 9. Positioning ring; 10. Drain pipe; 11. Driving motor; 12. Spring telescopic pipe; 13. Expansion bolt; 14. Grid plate; 15. Water storage cylinder; 16. Liquid level display bar; 17. Water storage tank; 18. Flower bed; 19. Water-absorbing sponge; 20. Water pipe; 21. Drip pipe; 22. Delivery pipe; 23. Soil; 24. First control valve; 25. Second control valve; 26. First liquid level detector; 27. Second liquid level detector. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-6 The present invention provides a viaduct rainwater collection and utilization system for sponge city, including a rainwater collection device installed at the bottom of the bridge expansion joint 1, a water storage cylinder 15 arranged below the bridge expansion joint 1, and a water storage tank 17 buried at the bottom of a flower bed 18. The present invention collects and stores rainwater on the viaduct to achieve the requirements of water storage and absorption in sponge city, and reuses the accumulated water after treatment, which reflects the requirements of environmental protection.

[0033] Among them, the above-mentioned rainwater collecting device includes two mounting plates 2 fixed on the two edges of the expansion joint 1 of the bridge body, and the inner end of the mounting plate 2 is provided with a horizontal slide groove 201. Two correspondingly matched collecting half boxes 3 are slidably installed in the slide groove 201. The two collecting half boxes 3 are sealed and connected by a telescopic folding part 4. A cylindrical dredging part 7 is provided at the bottom of one of the collecting half boxes 3, and a driving motor 11 is provided at the outer end of the dredging part 7. The output end of the driving motor 11 extends into the interior of the dredging part 7 and is fixedly connected with a spiral rod 8. A sewage pipe 10 is provided at the bottom of the dredging part 7. One side of the other collecting half box 3 is threadedly connected with a collecting pipe 6 through a connecting pipe 5, and the collecting pipe 6 is collected into a water storage cylinder 15. As a preferred embodiment, the connecting pipe 5 is located at the top of the collecting half box 3. Such a configuration allows the silt in the rainwater to settle in the rainwater collecting device, and the rainwater flows into the collecting pipe 6 through the connecting pipe 5.

[0034] One end of the water tank 17 is provided with a water pipe 20 connected to the bottom of the water storage cylinder 15, and a water-absorbing sponge 19 is provided at the bottom of the flower bed 18. The water-absorbing sponge 19 penetrates and extends into the inner bottom of the water tank 17, and soil 23 is laid on the water-absorbing sponge 19 located in the flower bed 18. Drip pipes 21 connected to the bottom of the water storage cylinder 15 are dispersedly arranged on the soil 23. As a preferred embodiment, a plurality of holes are opened on the top of the water tank 17, and the water-absorbing sponge 19 is divided into two parts. One part of the water-absorbing sponge 19 is spread to the bottom of the soil 23 in the flower bed 18, and the other part extends into the bottom of the water tank 17 through the holes on the water tank 17. With this arrangement, when it rains, the excess water in the flower bed 18 penetrates through the soil 23 and flows into the water tank 17 along the water-absorbing sponge 19 for storage. When the flower bed 18 is dry, the water-absorbing sponge 19 is used to absorb the water in the water tank 17 to provide water for the soil 23 in the flower bed 18 to keep it moist.

[0035] In this embodiment, the mounting plate 2 is fixed to the bottom edge of the expansion joint 1 of the bridge body by means of expansion bolts 13. There are two slide grooves 201 which are respectively opened at the opposite ends of the two mounting plates 2. The cross section of the slide groove 201 is a T-shaped structure, and the bottom and the opposite ends of the slide groove 201 respectively penetrate the mounting plate 2. During specific use, the slider 301 can be inserted into the interior of the slide groove 201 from the inner end opening of the slide groove 201, and the slider 301 can move inside the slide groove 201 by slidingly cooperating with the slide groove 201, thereby facilitating the installation of the rainwater collection device.

[0036] In this embodiment, a slider 301 that slides with the slide groove 201 is provided on the top of the collecting half box 3. The two collecting half boxes 3 and the telescopic folding part 4 form a complete collecting box located directly below the expansion joint 1 of the bridge body. As a preferred embodiment, the length dimension of the collecting half box 3 is equal to the length dimension of the expansion joint 1 of the bridge body. Such an arrangement enables the rainwater collection device composed of the collecting half box 3 to collect rainwater flowing into the expansion joint 1 of the bridge body. The telescopic folding part 4 is a folding plastic structure. As a preferred embodiment, the telescopic folding part 4 is folded with each other like a bellows. Such an arrangement enables the telescopic folding part 4 to be flexibly stretched and contracted, so that the rainwater collection device can be installed under the expansion joint 1 of the bridge body with different widths, thereby expanding its scope of application.

[0037] In this embodiment, the bottom of the collecting half box 3 and the silting part 7 are inclined structures, and the sewage pipe 10 is located at the bottom of the silting part 7. In this way, when the spiral rod 8 stirs the silt, the silt will move along the spiral rod 8 along the inclined collecting half box 3 into the silting part 7, and be discharged smoothly through the sewage pipe 10.

[0038] In this embodiment, a positioning ring 9 is provided inside the dredging part 7, and the spiral rod 8 passes through the positioning ring 9. As a preferred embodiment, a section of the spiral rod 8 is a cylindrical structure, and no spiral blades are provided outside the cylindrical structure. The positioning ring 9 is welded by two semi-ring structures, and the positioning ring 9 is sleeved on the outer side of the cylindrical structure at this location. In this arrangement, the spiral rod 8 is limited and fixed by the positioning ring 9, so that the spiral rod 8 remains stable during rotation. At the same time, the length of the spiral rod 8 is smaller than the internal width of the two collecting half boxes 3 when compressed. In this arrangement, the collecting half boxes 3 can be conveniently compressed and installed.

[0039] In this embodiment, a horizontal spring telescopic tube 12 is arranged inside the two collecting half boxes 3. The spring telescopic tube 12 includes an outer tube and an inner rod respectively fixedly connected to the two collecting half boxes 3. A sealing ring is arranged at the inner end of the outer tube. The inner rod is inserted into the inner part of the outer tube through the sealing ring. A limit block is arranged at the inner end of the inner rod. A spring member is arranged between the limit block and the bottom of the outer tube. In this way, when installing the rainwater collection device, the two collecting half boxes 3 are pressed inwardly, and the elastic force of the spring member is overcome, so that the inner rod is extended into the inner part of the outer tube until the sliders 301 on the two collecting half boxes 3 are installed in the slide grooves 201 on the mounting plate 2. Then, the pressing is stopped, and the elasticity of the spring member is used to push the inner rod outwardly, so that the inner rod moves toward the outer end of the outer tube, and then the two collecting half boxes 3 are opened, and the installation of the rainwater collection device is completed.

[0040] In this embodiment, a mesh plate 14 made of plastic is provided inside the bridge expansion joint 1. The mesh plate 14 installed inside the bridge expansion joint 1 is used to filter rainwater to prevent large garbage from entering the rainwater collection device through the bridge expansion joint 1 and blocking the rainwater collection system. The mesh plate 14 made of plastic has a certain deformation capacity and can adapt to the compression during the thermal expansion and contraction of the viaduct.

[0041] In this embodiment, a delivery pipe 22 is provided at one end of the water tank 17. The delivery pipe 22 facilitates the delivery of substances such as nutrient solution into the water tank 17, thereby improving the growth conditions of flowers and plants in the flower bed 18. A vertical liquid level display bar 16 is provided on the water storage cylinder 15. The liquid level display bar 16 is made of transparent glass. The water storage amount in the water storage cylinder 15 can be clearly seen by providing the liquid level display bar 16.

[0042] In this embodiment, the water supply pipe 20 and the drip pipe 21 are respectively provided with a first control valve 24 and a second control valve 25 at the ends close to the water storage cylinder 15. By controlling the first control valve 24, it is convenient to control the flow of water from the water storage cylinder 15 to the water storage tank 17, and by controlling the second control valve 25, it is convenient to control the amount of drip irrigation from the drip pipe 21 to the flower bed 18.

[0043] In this embodiment, a first liquid level detector 26 and a second liquid level detector 27 are respectively provided at the inner top and the inner bottom of the water storage tank 17. In this arrangement, when the water level in the water storage tank 17 reaches below the second liquid level detector 27, the first control valve 24 is opened to allow the water in the water storage cylinder 15 to flow into the water storage tank 17; when the water level in the water storage tank 17 reaches the first liquid level detector 26, the first control valve 24 is closed to stop the water storage cylinder 15 from injecting water into the water storage tank 17.

[0044] When the rainwater collecting device of the present invention is used, it needs to be assembled on the viaduct first. Specifically, the mounting plate 2 is first fixed to both sides of the bottom of the expansion joint 1 of the bridge body by the expansion bolts 13, and the slide grooves 201 on the mounting plate 2 are facing each other, the two collecting half boxes 3 are squeezed inwardly, and the elastic force of the spring member in the spring expansion tube 12 is overcome to make the inner rod extend into the outer tube until the sliders 301 on the two collecting half boxes 3 are installed in the slide grooves 201 on the mounting plate 2, and the squeezing is stopped, and the elasticity of the spring member is used to push the inner rod outward to move the inner rod toward the outer end of the outer tube, thereby opening the two collecting half boxes 3, completing the installation of the rainwater collecting device, and connecting the rainwater collecting device to the collecting tube 6 through the connecting pipe 5, and the water storage tank 17 is buried in the soil, and the flower bed 18 is built above the water storage tank 17.

[0045] When it rains, rainwater on the viaduct flows into the expansion joint 1 of the bridge body, and is filtered by the mesh plate 14. The filtered rainwater and sediment flow into the rainwater collection device, and the sediment in the rainwater settles at the bottom of the rainwater collection device. The rainwater flows into the water storage cylinder 15 through the connecting pipe 5 and the collecting pipe 6 for collection and storage. At the same time, the rainwater received in the flowerbed 18 moistens the soil 23 in the flowerbed 18, and then penetrates into the water storage tank 17 through the water-absorbing sponge 19, and the rainwater is collected by the water storage tank 17.

[0046] When the humidity in the soil 23 of the flowerbed 18 drops to a certain level, the water-absorbing sponge 19 is used to absorb the rainwater in the water storage tank 17 to reversely moisten the soil 23 in the flowerbed 18, so that the soil 23 at the bottom is kept moist. At the same time, the second control valve 25 is started to drip the rainwater stored in the water storage cylinder 15 into the flowerbed 18 through the drip pipe 21. After the drip irrigation moistens the soil 23 of the flowerbed 18, the second control valve 25 is closed to stop the drip irrigation, and the excess water dripped into the soil 23 of the flowerbed 18 flows back into the water storage tank 17 through the water-absorbing sponge 19 for storage and recycling.

[0047] When the water level in the water tank 17 is lower than the second liquid level detector 27, the first control valve 24 is activated to allow the rainwater in the water storage cylinder 15 to be injected into the water tank 17 through the water pipe 20 until the water level in the water tank 17 reaches the first liquid level detector 26, and then the first control valve 24 is closed to stop the injection, so that the rainwater stored in the water tank 17 can meet the purpose of wetting the soil 23 of the flowerbed 18 through the water-absorbing sponge 19 on a daily basis;

[0048] After the device has been used for a period of time, the silt will settle at the bottom of the rainwater collection device. The drain pipe 10 is opened and the drive motor 11 is started. The drive motor 11 drives the screw rod 8 to rotate, and the screw rod 8 is used to transport the silt at the bottom of the rainwater collection device to the drain pipe 10 and discharge it.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A viaduct rainwater collection and utilization system for sponge city, characterized by: It comprises a rainwater collection device installed at the bottom of a bridge expansion joint (1), a water storage cylinder (15) arranged below the bridge expansion joint (1), and a water storage tank (17) buried at the bottom of a flower bed (18); The rainwater collection device comprises two mounting plates (2) fixed on two edges of a bridge expansion joint (1), the inner end of the mounting plate (2) being provided with a horizontal slide groove (201), two correspondingly matched collecting half boxes (3) being slidably installed in the slide groove (201), the two collecting half boxes (3) being sealedly connected via a telescopic folding portion (4), the bottom of one of the collecting half boxes (3) being provided with a cylindrical dredging portion (7), the outer end of the dredging portion (7) being provided with a driving motor (11), the output end of the driving motor (11) extending into the interior of the dredging portion (7) and being fixedly connected with a spiral rod (8), the bottom of the dredging portion (7) being provided with a sewage discharge pipe (10), one side of the other collecting half box (3) being threadedly connected with a collecting pipe (6) via a connecting pipe (5), the collecting pipe (6) being collected into the water storage cylinder (15); A water pipe (20) connected to the bottom of the water storage cylinder (15) is arranged at one end of the water storage tank (17); a water-absorbing sponge (19) is arranged at the bottom of the flower bed (18); the water-absorbing sponge (19) penetrates and extends into the inner bottom of the water storage tank (17); soil (23) is laid on the water-absorbing sponge (19) located in the flower bed (18); and drip pipes (21) connected to the bottom of the water storage cylinder (15) are dispersedly arranged on the soil (23).

2. The viaduct rainwater collection and utilization system for sponge city according to claim 1 is characterized in that: The mounting plate (2) is fixed to the bottom edge of the bridge expansion joint (1) by means of expansion bolts (13); there are two slide grooves (201) which are respectively opened at the opposite ends of the two mounting plates (2); the cross section of the slide groove (201) is a T-shaped structure, and the bottom and the opposite ends of the slide groove (201) respectively pass through the mounting plate (2).

3. The viaduct rainwater collection and utilization system for sponge city according to claim 2 is characterized in that: A slider (301) that slidably cooperates with the slide groove (201) is provided on the top of the collection half box (3); the two collection half boxes (3) and the telescopic folding part (4) form a complete collection box located directly below the bridge body expansion joint (1); and the telescopic folding part (4) is a folding plastic structure.

4. The viaduct rainwater collection and utilization system for sponge city according to claim 1 is characterized in that: The collecting half box (3) and the bottom of the dredging section (7) are inclined structures, and the sewage discharge pipe (10) is located at the bottom of the dredging section (7).

5. The viaduct rainwater collection and utilization system for sponge city according to claim 1 is characterized in that: A positioning ring (9) is provided inside the desilting portion (7), and the spiral rod (8) passes through the positioning ring (9).

6. The viaduct rainwater collection and utilization system for sponge city according to claim 1 is characterized by: A horizontal spring telescopic tube (12) is arranged inside the two collecting half boxes (3), and the spring telescopic tube (12) comprises an outer tube and an inner rod which are respectively fixedly connected to the two collecting half boxes (3), a sealing ring is arranged at the inner end of the outer tube, the inner rod is inserted into the inner part of the outer tube through the sealing ring, and a limit block is arranged at the inner end of the inner rod, and a spring member is arranged between the limit block and the bottom of the outer tube.

7. The viaduct rainwater collection and utilization system for sponge city according to claim 1 is characterized by: A mesh plate (14) made of plastic material is arranged inside the bridge body expansion joint (1).

8. The viaduct rainwater collection and utilization system for sponge city according to claim 1 is characterized by: A delivery pipe (22) is arranged at one end of the water storage tank (17); a vertical liquid level display bar (16) is arranged on the water storage cylinder (15), and the liquid level display bar (16) is made of transparent glass.

9. The viaduct rainwater collection and utilization system for sponge city according to claim 1 is characterized by: The ends of the water delivery pipe (20) and the drip pipe (21) close to the water storage cylinder (15) are respectively provided with a first control valve (24) and a second control valve (25).

10. The viaduct rainwater collection and utilization system for sponge city according to claim 1 is characterized by: The inner top and inner bottom of the water storage tank (17) are respectively provided with a first liquid level detector (26) and a second liquid level detector (27).

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