CN212013916U - Viaduct rainwater collecting, filtering and irrigating device - Google Patents

Abstract

The utility model discloses an viaduct rainwater collecting, filtering and irrigating device, which relates to the technical field of rainwater collecting and irrigating, and comprises a filter pipe communicated with a rainwater collecting pipeline, wherein the filter pipe is detachably connected with the rainwater collecting pipeline; the filter tube comprises a tube body, a filter element is arranged in the tube body, both ends of the tube body are respectively provided with an opening structure, and both opening structures at both ends of the tube body can be detachably connected with end covers; the collected rainwater is filtered by the filter pipe, stored in the rainwater collecting device and supplied to the rainwater irrigation device for use. When the filter element reaches the service life or the blockage problem occurs, the end covers of the opening structures at the two ends of the tube body can be detached by a user, the filter element in the tube body is replaced, and even the integral replacement of the filter tube can be carried out. The user can carry out periodic check to the behavior of filter tube to accomplish the change operation of filter core or filter tube according to actual conditions, thereby solve the problem that the filter tube takes place blocking phenomenon easily.

Description

Viaduct rainwater collecting, filtering and irrigating device

Technical Field

The utility model belongs to the technical field of the rainwater is collected and is irrigated and specifically relates to a filtration irrigation equipment is collected to overpass rainwater is related to.

Background

Viaducts, also called overpasses, are bridges supported by high-support towers or struts and crossing urban roads or deep-trench canyons. With the rapid development of society and the continuous deepening of urbanization process, buildings are increasingly dense, streets are difficult to widen, and the traffic jam condition is increasingly serious. The viaduct can play roles in evacuating dense traffic and improving the transportation efficiency, so that the role of the viaduct in the urbanization process is increasingly highlighted, and the importance of supporting facilities related to the viaduct is improved.

The existing Chinese patent with the publication number of CN206646402U discloses a viaduct bridge pier rainwater collection system, which comprises a rainwater collection mechanism for collecting viaduct bridge deck rainwater, a rainwater storage mechanism for storing rainwater and an irrigation mechanism for irrigating a green belt under a viaduct, wherein the rainwater collection mechanism, the rainwater storage mechanism and the irrigation mechanism are sequentially connected. The rainwater storage mechanism comprises a water storage tank without a cover, and the water storage tank is communicated with a water drain pipe communicated with a municipal pipe network; the rainwater collecting mechanism comprises a rainwater collecting pipeline arranged on the viaduct pier and a rainwater filtering device arranged on the rainwater collecting pipeline, and the rainwater collecting pipeline is communicated with the uncovered water storage tank; watering mechanism is provided with intelligent irrigation valve including the irrigation pipe on the irrigation pipe. The rainwater of bridge floor is collected via rainwater collection pipeline, is deposited in the water storage tank after rainwater filter equipment filters, supplies to irrigate the mechanism and use.

In the in-service use process, the rainwater filter device generally adopts the filter tube of pipeline formula to be linked together with rainwater collection pipeline, plays the effect of filtering impurity in the rainwater. But the filter tube formula structure as an organic whole, long-time back of using, the easy jam problem that takes place, and then influences the stability of overpass rainwater collection system work, and prior art exists and can improve the part.

SUMMERY OF THE UTILITY MODEL

To the technical problem, an object of the utility model is to provide an overhead bridge rainwater is collected and is filtered irrigation equipment is through setting up detachable filter tube of components of a whole that can function independently to solve the problem that the filter tube takes place blocking phenomenon easily, and then reach the purpose that improves overhead bridge rainwater collection system job stabilization nature.

In order to achieve the above purpose, the utility model provides a following technical scheme: an viaduct rainwater collecting, filtering and irrigating device comprises a filter pipe communicated with a rainwater collecting pipeline, wherein the filter pipe is detachably connected with the rainwater collecting pipeline; the filter tube comprises a tube body, a filter element is arranged in the tube body, both ends of the tube body are respectively provided with an opening structure, and both opening structures at both ends of the tube body can be detachably connected with end covers; the one end and the rainwater collection pipeline of filter tube are linked together, just the other end of filter tube communicates in proper order has rainwater storage device and rainwater watering device, rainwater watering device is including the automatic pressure irrigation ware that is linked together with rainwater storage device, automatic pressure irrigation ware is external to have the photovoltaic board or connect municipal power grids, just automatic pressure irrigation ware is connected with the watering pipeline.

Through adopting above-mentioned technical scheme, the rainwater of collecting filters the back via the filter tube, saves in rainwater collection device and supplies with rainwater watering device and use to realize that the rainwater collects the purpose of irrigating the afforestation plant. The filtering pipe is detachably connected with the rainwater collecting pipeline, and the filtering core is detachably arranged in the pipe body of the filtering pipe; when the filter element reaches the service life or the blockage problem occurs, the end covers at the opening structures at the two ends of the tube body can be detached by a user, the filter element in the tube body is replaced, and even the integral replacement operation can be carried out on the filter tube. The user can carry out periodic check to the behavior of filter tube, sets for the normal operating time of filter tube simultaneously to accomplish the change operation of filter core or filter tube according to actual conditions, thereby solve the problem that the filter tube takes place blocking phenomenon easily, and then reach the purpose that improves overpass rainwater collection system job stabilization nature.

The utility model discloses further set up to: the automatic pressure irrigator is formed by connecting a pressure tank, an air compressor, a storage battery, a charging controller and an automatic controller through pipelines; the photovoltaic panel is sequentially connected with the charging controller and the storage battery; the air compressor is connected with an air inlet of the pressure tank through a pipeline, an air inlet valve is arranged on the pipeline, the rainwater storage device is connected with a water inlet of the pressure tank through a pipeline, a water inlet valve is arranged on the pipeline, a water outlet of the pressure tank is connected with an irrigation pipeline through a pipeline, and a water outlet valve is arranged on the pipeline; the automatic controller is powered by a photovoltaic panel or a municipal power grid and controls the air compressor to work; the top of overhead tank is provided with the manometer, and the overhead tank passes through the pipe connection with the manometer, is connected with the branch pipe on the pipeline, is provided with the relief valve on the branch pipe, and the upper portion and the lower part of overhead tank are provided with water level gauge and lower water level gauge respectively.

Through adopting above-mentioned technical scheme, the overhead tank extracts the storage water in the rainwater storage device with air compressor cooperation work to supply water for green plant through watering the pipeline, combine automated control to realize effective irrigation through the mode that the secondary holds the ability simultaneously, be favorable to controlgear cost and satisfy required water yield and water pressure of irrigation, and various instrument person of being convenient for use on the overhead tank adjusts control rainwater watering device.

The utility model discloses further set up to: the middle part of the pressure tank is connected with a medicine storage tank through a pipeline, and a liquid medicine control valve is arranged on the pipeline.

By adopting the technical scheme, a user can allocate the pharmaceutical industry according to the growth requirements of the greening plants, and realize the timed and quantitative automatic pesticide spraying and irrigating operation through the rainwater irrigating device.

The utility model discloses further set up to: a plurality of the filter pipes are arranged in parallel and are communicated with a rainwater collecting pipeline together.

Through adopting above-mentioned technical scheme, a plurality of filter tube parallel arrangement constitute filter equipment's design, both are favorable to improving the filter effect of rainwater, are favorable to improving the filtration treatment capacity in the rainwater filter equipment unit interval again, and the rainwater flow through filter equipment in the unit interval has obtained the promotion promptly.

The utility model discloses further set up to: the water inlet of the filter pipe is communicated with the rainwater collecting pipeline and is provided with a multi-way pipe, and the water inlet of the filter pipe is fixedly connected with a flange of the multi-way pipe.

Through adopting above-mentioned technical scheme, the setting of the multi-ported pipe has realized the intercommunication of a plurality of filter tubes and rainwater collecting pipe, and the filter tube passes through flange joint fixed mounting structure simple with the multi-ported pipe, is convenient for implement, has better enforceability and operation convenience.

The utility model discloses further set up to: the filter pipe is vertically arranged, and a water inlet of the filter pipe is positioned above the water outlet.

Through adopting above-mentioned technical scheme, the vertical setting of filter tube, then the rainwater can smoothly pass through the filter tube and accomplish the filtration operation under self action of gravity, and need not additionally add compression equipment, is favorable to improving the smooth and easy nature that the rainwater passes through the filter tube promptly.

The utility model discloses further set up to: the pipe cavity of body is formed with into water district in the position department of water inlet, just filter core is located into water under the district.

Through adopting above-mentioned technical scheme, the district of intaking of body plays the effect of buffering speed reduction equally, and the district of intaking of body matches with the multi-ported pipe promptly and plays the effect of buffering speed reduction jointly, and the rainwater after the speed reduction more is favorable to improving the filtration operation effect of rainwater through the filter tube.

The utility model discloses further set up to: a storage water pipe is detachably connected to the water outlet of the filtering pipe and communicated with a rainwater storage device; the storage water pipe comprises an embedded pipeline embedded in the ground.

By adopting the technical scheme, the rainwater filtered by the rainwater filtering device can be stored in the rainwater storage device, and the stored rainwater can be used for irrigating the viaduct green belt or the viaduct green belt; and the storage water pipe part is buried under the ground, which is beneficial to protecting the storage water pipe.

The utility model discloses further set up to: the filter element comprises a filter cotton layer, a geotextile layer, a ceramsite layer and a sponge layer which are sequentially arranged from the upper part to the lower part of the pipe cavity of the pipe body.

By adopting the technical scheme, the filtering cotton layer, the geotextile layer, the ceramsite layer and the sponge layer are matched to finish the rainwater filtering operation; the filter cotton layer plays preliminary absorption and filterable effect, and the geotechnological cloth layer plays to separate the effect of penetrating water and certain filtration, and the haydite in the haydite layer has porous characteristic, is favorable to further improving the granule filter effect of rainwater, and the sponge layer plays and bears and adsorbs the effect of tiny granule.

The utility model discloses further set up to: the layer thickness of the filter cotton layer, the geotechnical cloth layer, the ceramsite layer and the sponge layer is increased layer by layer.

By adopting the technical scheme, the thickness of each layer of the filter element is increased layer by layer according to the characteristics of each layer, namely, the filtering effect of the filter element is integrally improved on the premise of meeting the filtering requirements of each layer.

To sum up, the utility model discloses following beneficial effect has:

one is as follows: a user can regularly check the working condition of the filter pipe, set the normal working time of the filter pipe and finish the replacement operation of the filter element or the filter pipe according to the actual condition, so that the problem that the filter pipe is easy to block is solved, and the aim of improving the working stability of the viaduct rainwater collection system is fulfilled;

the second step is as follows: the rainwater irrigation device utilizes solar energy (or municipal power supply) and a pressure tank to form a secondary energy storage system, and realizes high-efficiency irrigation operation by combining automatic control. In the secondary energy storage system, the light energy is converted into the electric energy, the electric energy is stored by the storage battery to be used as a power supply of the system, and the air compressor is used for inflating and pressurizing the pressure tank by utilizing the compressibility of air, so that the pressure required by irrigation is achieved;

and thirdly: the multi-way pipe is matched with a flange connecting structure to realize the communication between the filter pipe and the rainwater collecting pipeline, and simultaneously the multi-way pipe is matched with a water inlet area in the pipe body to realize the purpose of slowing down the flow velocity of rainwater;

fourthly, the method comprises the following steps: the thickness setting of the many filter layers structure of filter core and each filtering layer is favorable to further improving the rainwater and collecting the filter effect who filters irrigation equipment.

Drawings

FIG. 1 is a schematic view of the general structure of an elevated bridge rainwater collection system;

FIG. 2 is a schematic view of the general structure of a rainwater collection and filtration irrigation device;

FIG. 3 is a schematic longitudinal cross-sectional view of a filter tube;

fig. 4 is a schematic system diagram of a rainwater irrigation device.

Reference numerals: 1. a rainwater collection pipe; 2. a rainwater storage device; 3. a rainwater irrigation device; 31. a photovoltaic panel; 32. irrigating a pipeline; 4. a filter tube; 41. a pipe body; 42. a filter element; 421. a cotton filtering layer; 422. a geotextile layer; 423. a ceramic layer; 424. a sponge layer; 43. an end cap; 44. a water inlet area; 45. an open structure; 5. a storage water pipe; 51. burying a pipeline; 6. a multi-pass tube; 7. a flange plate; 8. a fixed mount; 81. mounting a tripod; 82. a collar; 9. an automatic pressure irrigator; 91. a pressure tank; 911. a pressure gauge; 912. a branch pipe; 913. an upper water level gauge; 914. a lower water level gauge; 915. a pressure relief valve; 916. a medicine storage tank; 917. a liquid medicine control valve; 92. a storage battery; 93. a charge controller; 94. an air compressor; 95. a water outlet valve; 96. an automatic controller; 97. an intake valve; 98. a water inlet valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the viaduct rainwater collecting, filtering and irrigating device is communicated with a rainwater collecting pipeline 1 of a viaduct rainwater collecting system and is used for filtering impurities such as sand and stone particles mixed in rainwater; and the filtered rainwater is stored in the rainwater storage device 2 and used as irrigation water for the rainwater irrigation device 3 to irrigate green belts under the viaduct, so that the purpose of rainwater collection and reutilization is achieved. The rainwater is collected and is filtered irrigation equipment is including dismantling the filter tube 4 of connecting on rainwater collecting pipeline 1, and filter tube 4 is including body 41 and set up the filter core 42 in body 41, and filter core 42 demountable installation in body 41, and the user can wholly change filter tube 4 or components of a whole that can function independently change filter core 42 according to the actual service conditions of filter tube 4.

The vertical setting of a plurality of filter tubes 4 and communicate on rainwater collection pipeline 1 jointly, the rainwater flows in and the vertical delivery port that passes through filter tube 4 downwards by the water inlet of filter tube 4 flows, and the water inlet of a plurality of filter tubes 4 is linked together with rainwater collection pipeline 1 promptly, and the delivery port of a plurality of filter tubes 4 is linked together with rainwater storage device 2, and the delivery port of a plurality of filter tubes 4 and rainwater storage device 2 communicate jointly and have storage water pipe 5. In this embodiment, adopt two vertical setting's filter tube 4 to constitute overall structure, and the water inlet and the delivery port of two filter tubes 4 all communicate jointly and have multi-ported pipe 6, and 6 perpendicular to rainwater collection pipeline 1 of multi-ported pipe are linked together rather than, and 6 side directions of multi-ported pipe communicate on rainwater collection pipeline 1 promptly. In this embodiment, the multi-way pipe 6 is a three-way pipe, i.e. the water inlets of the two filtering pipes 4 are laterally communicated with the rain water pipe through the three-way pipe, and the water outlets of the two filtering pipes 4 are laterally communicated with the storage water pipe 5 through the three-way pipe. The water inlet and the water outlet of the filter pipe 4 are detachably connected with the three-way pipe in a flange connection mode, namely, the detachable connection is realized through the flange 7, so that the filter pipe 4 is conveniently and fixedly installed by an operator.

The storage water pipe 5 comprises a middle section part buried in the ground and is arranged as a buried pipeline 51, and two end parts of the storage water pipe 5 are respectively communicated with the rainwater storage device 2 and the three-way pipe; the storage water pipe 5 is partially buried under the ground to achieve the purpose of protecting the storage water pipe 5.

The upper and lower both ends of body 41 of filter tube 4 all set up detachable structure, and the upper and lower both ends of body 41 all set up open structure 45 and threaded connection has end cover 43 promptly, and filter element 42 can insert to body 41 in and the butt is on end cover 43 of body 41 lower extreme from the upper end open structure 45 of body 41. A water inlet area 44 is formed between the upper end of the filter element 42 and the end cover 43 at the upper end of the tube body 41, namely, the water inlet area 44 is positioned at the water inlet position of the tube body 41, and the filter element 42 is positioned right below the water inlet area 44; rainwater in the rainwater pipe enters the water inlet area 44 through the three-way pipe, the three-way pipe is matched with the water inlet area 44 to play a role in buffering the flow velocity of the rainwater, and the slowed rainwater downwards passes through the filter element 42, so that the rainwater filtering operation is completed. Referring to fig. 2 and 3, the filter element 42 is sequentially provided with a filter cotton layer 421, a geotextile layer 422, a ceramsite layer 423 and a sponge layer 424 from top to bottom, and the thicknesses of the four layers are gradually increased from the upper layer to the lower layer, so as to achieve the purpose of improving the rainwater filtering effect of the filter pipe 4.

As shown in fig. 2, a fixing frame 8 is installed on the bridge pier of the viaduct, the fixing frame 8 includes a mounting tripod connected and fixed with the bridge pier, a lantern ring 82 is locked on the mounting tripod 81, and the lantern ring 82 is coaxially sleeved outside the pipe body 41 of the filter pipe 4, so as to achieve the purpose of fixing the filter pipe 4.

With reference to fig. 1 and 4, the rainwater is filtered by the filter pipe 4 and then enters the rainwater collection device 2 for storage, and then enters the rainwater irrigation device 3 for irrigating green plants, the rainwater irrigation device 3 comprises an automatic pressure irrigator 9, a photovoltaic panel 31 and an irrigation pipeline 32, the photovoltaic panel 31 supplies power to the automatic pressure irrigator 9, the automatic pressure irrigator 9 extracts the storage rainwater in the rainwater collection device 2 and supplies water to the green plants through the irrigation pipeline 32, and a storage water tank can be used as the rainwater collection device 2.

The automatic pressure irrigator 9 is formed by connecting a pressure tank 91, an air compressor 94, a storage battery 92, a charging controller 93 and an automatic controller 96 through pipelines; the photovoltaic panel 31 is connected with the charge controller 93 and the storage battery 92 in sequence; the air compressor 94 is connected with the air inlet of the pressure tank 91 through a pipeline, an air inlet valve 97 is arranged on the pipeline, the rainwater collecting device 2 is connected with the water inlet of the pressure tank 91 through a pipeline, a water inlet valve 98 is arranged on the pipeline, the water outlet of the pressure tank 91 is connected with the irrigation pipeline 32 through a pipeline, and a water outlet valve 95 is arranged on the pipeline; the automatic controller 96 is powered by the photovoltaic panel 31 (or a municipal power supply mode can be adopted to replace the photovoltaic power supply mode), and controls the air compressor 94 to work; the top of overhead tank 91 is provided with manometer 911, and overhead tank 91 passes through the pipeline with manometer 911 and is connected with branch 912 on the pipeline, is provided with relief valve 915 on the branch 912, and overhead tank 91's upper portion and lower part are provided with water level gauge 913 and lower water level gauge 914 respectively. The middle part of the pressure tank 91 is connected with a medicine storage tank 916 through a pipeline, and a liquid medicine control valve 917 is arranged on the pipeline. Irrigation pipeline 32 can extend to the place that needs irrigate, and can set up different nozzles on the irrigation pipeline 6 to different operations such as implementation drip irrigation, sprinkling irrigation, atomizing humidification can be applied to like afforestation irrigation, crops irrigation and flowers irrigation etc..

During raining, rainwater is collected and stored as an irrigation water source, water is saved, power is generated by a solar photovoltaic cell (or power is directly supplied by municipal administration), the rainwater is stored by a storage battery 92 and serves as a working power supply of the system, and water in the pressure tank 91 has certain pressure by an air compressor 94, so that kinetic energy is provided for irrigation. Rainwater is collected and stored in the rainwater storage device 3; photovoltaic cells generate electricity from solar energy and store the electricity in the battery 92 through a photovoltaic controller, and the photovoltaic cell system provides power to the automatic controller 96 (or is directly powered by municipalities). The automatic controller 96 controls the air compressor 94 to work, when the system works, the water inlet valve 98 and the pressure relief valve 915 are opened, the collected and stored rainwater enters the pressure tank 91, and when the rainwater reaches a set high water level, the water inlet valve 98 and the pressure relief valve 915 are closed, and the water inlet is stopped. At this time, other valves are also closed, and the pressure tank 91 becomes a closed container. The air compressor 94 is started, the air inlet valve 97 is opened, the pressure tank 91 is filled with compressed air to a set pressure, and the air compressor 94 stops working. At this time, the pressure in the pressure tank 91 is constant, the outlet valve 95 is opened, and water is irrigated through the irrigation pipe. When the water level in the pressure tank 91 is low to the set low level, the outlet valve 95 is closed, and the system stops discharging water. The pressure relief valve 915 and the water inlet valve 98 are opened, the system is refilled with water, then pressurized, and then drained for irrigation, and the cycle is repeated.

The present embodiment is further explained below in connection with the flow direction of rainwater:

rainwater on the bridge deck of the viaduct converges and enters the rainwater filtering device through the rainwater collecting pipeline 1, namely the rainwater is shunted through the three-way pipe and enters the two filtering pipes 4, the filtering operation of the rainwater is completed through the filtering cores 42 of the two filtering pipes 4, and then the rainwater is transferred and stored in the rainwater storage device 2 through the storage water pipe 5 and used as irrigation water of the rainwater irrigation device 3.

The present invention is not limited to the above embodiment, and those skilled in the art can make modifications to the embodiment as required without inventive contribution after reading the present specification, but all the modifications are protected by patent laws within the scope of the claims of the present invention.

Claims (10)

1. The utility model provides an overhead bridge rainwater is collected and is filtered irrigation equipment which characterized in that: the rainwater collecting device comprises a filtering pipe (4) communicated with a rainwater collecting pipeline (1), wherein the filtering pipe (4) is detachably connected with the rainwater collecting pipeline (1); the filter tube (4) comprises a tube body (41), a filter element (42) is arranged in the tube body (41), two ends of the tube body (41) are respectively provided with an opening structure (45), and the opening structures (45) at the two ends of the tube body (41) can be detachably connected with an end cover (43);

the one end and the rainwater of filter tube (4) are collected pipeline (1) and are linked together, just the other end of filter tube (4) communicates in proper order has rainwater storage device (2) and rainwater to water and puts (3), rainwater watering device (3) are including automatic pressure irrigation ware (9) that are linked together with rainwater storage device (2), automatic pressure irrigation ware (9) are external to have photovoltaic board (31) or connect municipal power grid, just automatic pressure irrigation ware (9) are connected with watering pipeline (32).

2. The viaduct rainwater collecting, filtering and irrigating device according to claim 1, wherein: the automatic pressure irrigator (9) is formed by connecting a pressure tank (91), an air compressor (94), a storage battery (92), a charging controller (93) and an automatic controller (96) through pipelines; the photovoltaic panel (31) is sequentially connected with the charging controller (93) and the storage battery (92); the air compressor (94) is connected with an air inlet of the pressure tank (91) through a pipeline, an air inlet valve (97) is arranged on the pipeline, the rainwater storage device (2) is connected with a water inlet of the pressure tank (91) through a pipeline, a water inlet valve (98) is arranged on the pipeline, a water outlet of the pressure tank (91) is connected with the irrigation pipeline (32) through a pipeline, and a water outlet valve (95) is arranged on the pipeline; the automatic controller (96) is powered by the photovoltaic panel (31) or a municipal power grid and controls the air compressor (94) to work; the top of overhead tank (91) is provided with manometer (911), and overhead tank (91) passes through the pipe connection with manometer (911), is connected with branch pipe (912) on the pipeline, is provided with relief valve (915) on branch pipe (912), and the upper portion and the lower part of overhead tank (91) are provided with water level gauge (913) and lower water level gauge (914) respectively.

3. An elevated bridge rainwater collection filtration irrigation device according to claim 2 wherein: the middle part of the pressure tank (91) is connected with a medicine storage tank (916) through a pipeline, and a liquid medicine control valve (917) is arranged on the pipeline.

4. The viaduct rainwater collecting, filtering and irrigating device according to claim 1, wherein: the plurality of filter pipes (4) are arranged in parallel and are communicated with the rainwater collecting pipeline (1) together.

5. The viaduct rainwater collecting, filtering and irrigating device according to claim 4, wherein: the water inlet of the filter pipe (4) is communicated with the rainwater collecting pipeline (1) to form a multi-way pipe (6), and the water inlet of the filter pipe (4) is fixedly connected with the multi-way pipe (6) through a flange.

6. The viaduct rainwater collecting, filtering and irrigating device according to claim 1, wherein: the filter pipe (4) is vertically arranged, and a water inlet of the filter pipe (4) is positioned above the water outlet.

7. An elevated bridge rainwater collection filtration irrigation device according to claim 6 and further comprising: the pipe cavity of the pipe body (41) is provided with a water inlet area (44) at the position of the water inlet, and the filter element (42) is positioned right below the water inlet area (44).

8. The viaduct rainwater collecting, filtering and irrigating device according to claim 1, wherein: a water outlet of the filtering pipe (4) is detachably connected with a storage water pipe (5), and the storage water pipe (5) is communicated with the rainwater storage device (2); the water storage pipe (5) comprises an embedded pipeline (51) embedded in the ground.

9. The viaduct rainwater collecting, filtering and irrigating device according to claim 1, wherein: the filter element (42) comprises a filter cotton layer (421), a geotextile layer (422), a ceramsite layer (423) and a sponge layer (424), which are sequentially arranged from the upper part to the lower part of the pipe cavity of the pipe body (41).

10. An elevated bridge rainwater collection filtration irrigation device according to claim 9 wherein: the layer thickness of the filter cotton layer (421), the geotechnical cloth layer (422), the ceramsite layer (423) and the sponge layer (424) is increased layer by layer.

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