A continuous rainwater harvesting device and method for municipal engineering.

Abstract

This invention relates to the field of municipal construction technology, specifically to a continuous rainwater harvesting device and method for municipal engineering projects; comprising: a diversion module; a filtration module, coaxially fixedly disposed within the diversion module, the filtration module having a filtration unit capable of multi-stage filtration of foreign matter in the rainwater; a guiding module, coaxially fixedly disposed outside the diversion module for guiding foreign matter and rainwater; a sediment collection module, disposed at the bottom of the guiding module and connected to the outlet end of the guiding module, the sediment collection module having a second diversion chamber for guiding foreign matter and a sediment collection basket for collecting foreign matter; and a storage module, coaxially fixedly disposed within the sediment collection module and located below the filtration module for temporarily storing the filtered rainwater; this invention can automatically adjust the rainwater collection state according to different rainfall amounts, resulting in high rainwater collection efficiency and good effect.

Description

Technical Field

[0001] This invention relates to the field of municipal construction technology, specifically to a continuous rainwater harvesting device and method for municipal engineering projects. Background Technology

[0002] In the process of municipal drainage and rainwater resource utilization, surface runoff is usually collected and transported by setting up rainwater collection wells, grates, and pipeline systems to achieve centralized recycling and reuse of rainwater. Existing rainwater harvesting devices mostly rely on simple inlets or grating structures for preliminary collection of rainwater. The overall structure is relatively fixed, the function is single, and it mainly focuses on rainwater diversion and storage.

[0003] However, in actual use, fallen leaves, silt, and other floating debris often accompany urban roads and green areas, easily covering or clogging the inlets or grille structures of existing devices. Once clogged, rainwater cannot enter the recycling system in a timely manner, not only reducing rainwater collection efficiency but also potentially causing localized flooding and affecting municipal drainage safety. Furthermore, existing devices generally lack effective self-cleaning or anti-clogging mechanisms, requiring regular manual cleaning, resulting in high maintenance costs and difficulty in responding promptly to sudden rainfall. Simultaneously, limited by a simple structural design, the rainwater recycling process often remains at a basic collection level, making it difficult to achieve a continuous and stable recycling process, resulting in a relatively limited recycling effect that fails to meet the needs of refined urban management. Summary of the Invention

[0004] To address the aforementioned problems, a continuous rainwater harvesting device for municipal engineering is provided. This device is designed to automatically adjust the rainwater collection state according to different rainfall amounts without clogging, thereby solving the technical problems of existing rainwater harvesting equipment, such as the easy clogging of collection holes by fallen leaves and other debris, affecting the continuity of rainwater harvesting, and the limited harvesting effect.

[0005] To address the problems of existing technologies, this invention provides a continuous rainwater harvesting device for municipal engineering, comprising: a diversion module; a filtration module, which is coaxially fixedly disposed within the diversion module and includes a filtration unit capable of multi-stage filtration of foreign matter in the rainwater; a guiding module, coaxially fixedly disposed outside the diversion module for guiding foreign matter and rainwater; a sediment collection module, disposed at the bottom of the guiding module and connected to the outlet end of the guiding module, which includes a second diversion chamber for guiding foreign matter and a sediment collection basket for collecting foreign matter; and a storage module, coaxially fixedly disposed within the sediment collection module and located below the filtration module for temporarily storing the filtered rainwater.

[0006] Preferably, the guiding module is provided with a first guide chamber and a first guide cavity, a second guide cavity, and a third guide cavity that are radially opened from top to bottom within the first guide chamber and are capable of guiding foreign objects of different sizes.

[0007] Preferably, the filtration unit is provided with a plurality of coaxially arranged first filtration chambers, second filtration chambers and third filtration chambers capable of multi-stage filtration of rainwater, and a linkage cable capable of lifting the first filtration chamber by the weight of the rainwater when the rainfall is heavy; the first filtration chamber and the third filtration chamber are connected by the linkage cable.

[0008] Preferably, the filtration unit further includes a water storage tank and a transmission rod capable of transferring rainwater by its own weight to the third filtration chamber; two transmission rods are provided, which are vertically arranged opposite each other on the third filtration chamber and the rod ends pass through the second filtration chamber and the first filtration chamber and are arranged towards the inside of the diversion module; two water storage tanks are provided, which are horizontally fixedly arranged on the top of the two transmission rods respectively.

[0009] Preferably, the water storage tank is a hollow double cone, and both the upper and lower surfaces of the double cone are provided with second through holes for rainwater to enter and exit.

[0010] Preferably, the first filter compartment is also provided with guide strips that can guide foreign objects in an elevated manner; the guide strips are provided at an angle on the outer wall of the first filter compartment and are arranged in multiple circumferentially along the axis of the first filter compartment.

[0011] Preferably, the sludge collection module includes a second flow guide chamber and a fourth, fifth, and sixth guide chamber located within the second flow guide chamber and corresponding one-to-one with the first, second, and third guide chambers, as well as a sludge collection basket capable of ultimately collecting foreign objects; the second flow guide chamber is coaxially disposed below the guide module; the sludge collection basket is coaxially disposed within the second flow guide chamber and communicates with the fourth, fifth, and sixth guide chambers.

[0012] Preferably, the storage module includes a sedimentation chamber capable of storing rainwater, a suction pipe capable of extracting rainwater, and a partition plate capable of confining the suction pipe to the bottom of the sedimentation chamber.

[0013] A method for continuous rainwater harvesting in municipal engineering, applied to a continuous rainwater harvesting device for municipal engineering, includes the following steps:

[0014] S1: First, place the recycling equipment at the drainage node. When it rains, the rainwater introduced by the diversion module is introduced into the first filter chamber, the second filter chamber and the third filter chamber in sequence. Through the different diameter through holes set on the outer wall of each filter chamber, the filter is filtered from coarse to fine in stages. Large particles are preferentially intercepted in the upstream filter chamber, while medium and fine particles are transferred downstream and separated by the corresponding filter chamber. At the same time, the conical chamber structure is used to promote the sliding and falling off of attached impurities during the filtration process.

[0015] S2: After the foreign matter is intercepted in each filter compartment, the first guide chamber, the second guide chamber and the third guide chamber, which are set in accordance with the filter compartment, guide the impurities of different particle sizes separately, so that they enter the corresponding guide channel under the action of water flow and gravity, and are further transported to the corresponding guide chamber downstream, realizing the graded transport of foreign matter in different paths, avoiding cross-flow and backflow.

[0016] S3: According to the change in rainfall intensity, the third filter chamber undergoes axial displacement under water pressure, and drives the first filter chamber to make reverse displacement adjustment via the linkage cable. Under low flow conditions, the first filter chamber is in a sinking position to form a water storage space. Under high flow conditions, the first filter chamber moves upward and connects with the first guide cavity, thereby directly exporting larger foreign objects accumulated on its surface and keeping the filtration channel unobstructed.

[0017] S4: When the rainfall is heavy, the introduced rainwater is first directed into the water storage tank for temporary storage. The slow flow structure reduces the impact of the water flow and forms a stable water pressure. At the same time, the weight of the water body applies a continuous force to the third filter chamber, thereby maintaining the connection between the first filter chamber and the first guide cavity, so that the filtration and pollution guiding process can be carried out continuously, avoiding filter failure due to excessive instantaneous flow.

[0018] S5: Finally, impurities of different diameters are transported to the collection basket through the guide chambers of each stage, realizing the centralized collection and subsequent cleaning of foreign objects of different particle sizes; while the rainwater after multi-stage filtration is finally introduced into the sedimentation chamber for static settling, so that fine particles are deposited at the bottom under the action of gravity, and the position of the suction end of the suction pipe is controlled by the set baffle, so that the water pumping process prioritizes the upper layer of clear water and avoids disturbing the bottom sediment, thereby completing the stable recovery and output of rainwater.

[0019] The advantages of this invention compared to the prior art are:

[0020] This invention achieves graded interception and continuous filtration of foreign matter of different particle sizes in rainwater through the coordinated operation of a filtration module, a guiding module, a dirt collection module, and a storage module. Furthermore, by adjusting the docking state between the first filtration chamber and the first guiding cavity via a linkage cable, it enables adaptive switching of the filtration channels and directional export of large particles under different rainfall conditions. Simultaneously, with multiple sequentially connected guiding cavities and dirt collection baskets, it ultimately achieves graded transmission and centralized collection of impurities in rainwater, effectively solving the problems of easy clogging, filtration interruption, and limited recovery effect in existing rainwater harvesting devices. Attached Figure Description

[0021] Figure 1 This is a three-dimensional diagram of a continuous rainwater harvesting device used in municipal engineering.

[0022] Figure 2 This is a top view of a continuous rainwater harvesting system used in municipal engineering projects.

[0023] Figure 3 yes Figure 2 A three-dimensional sectional view of section AA.

[0024] Figure 4 yes Figure 3 A magnified view of section B.

[0025] Figure 5 This is a side view of a continuous rainwater harvesting system used in municipal engineering projects.

[0026] Figure 6 yes Figure 5 Sectional view at point CC.

[0027] Figure 7 yes Figure 6 A magnified view of a portion of point C.

[0028] Figure 8 This is an exploded perspective view of a continuous rainwater harvesting device used in municipal engineering.

[0029] Figure 9 This is an exploded 3D view of the filtration module in a continuous rainwater harvesting device used in municipal engineering.

[0030] The numbers on the map are:

[0031] 1. Traffic generation module;

[0032] 2. Filtration module; 21. Filtration unit; 211. First filtration chamber; 212. Second filtration chamber; 213. Third filtration chamber; 214. Linkage cable; 215. Water storage tank; 2151. Second through hole; 216. Conducting rod; 217. First through hole; 218. Guide rod; 219. Guide strip;

[0033] 3. Guiding module; 31. First guide chamber; 32. First guide cavity; 33. Second guide cavity; 34. Third guide cavity;

[0034] 4. Sludge collection module; 41. Second guide chamber; 42. Fourth guide cavity; 43. Fifth guide cavity; 44. Sixth guide cavity; 45. Sludge collection basket;

[0035] 5. Accumulation module; 51. Sedimentation chamber; 52. Suction pipe; 53. Divider. Detailed Implementation

[0036] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0037] See Figures 1 to 9 The image shows a continuous rainwater harvesting device for municipal engineering, comprising: a diversion module 1; a filtration module 2, coaxially fixedly disposed within the diversion module 1, the filtration module 2 having a filtration unit 21 capable of multi-stage filtration of foreign matter in the rainwater; a guiding module 3, coaxially fixedly disposed outside the diversion module 1, for guiding foreign matter and rainwater; a sludge collection module 4, disposed at the bottom of the guiding module 3 and connected to the outlet end of the guiding module 3, the sludge collection module 4 having a second guide chamber 41 capable of guiding foreign matter and a sludge collection basket 45 capable of collecting foreign matter; and a storage module 5, coaxially fixedly disposed within the sludge collection module 4 and located below the filtration module 2, for temporarily storing the filtered rainwater.

[0038] During rainfall, rainwater is first collected and guided by the diversion module 1 and directed towards the filtration module 2. Once inside the filtration module 2, fallen leaves, gravel, and suspended impurities mixed within are sequentially screened through multi-stage filtration units 21. Different filtration chambers, based on their opening size and spatial distribution, form a graded filtration path from coarse to fine. During this process, larger foreign objects are preferentially intercepted by the upstream filtration structure and discharged along a predetermined flow direction, while medium and fine particles are sequentially transferred downstream and separated by their corresponding filtration structures. Simultaneously, the rainwater... The guide module 3 constrains the flow field outside each stage of the filter compartment, causing the intercepted foreign matter to deflect along a preset direction, preventing it from accumulating on the filter surface and forming a covering layer. The separated foreign matter is finally guided into the sludge collection module 4 under the combined action of gravity and water flow, achieving classified collection. The rainwater after multi-stage filtration continues to permeate downwards under the action of gravity, and after passing through the filter layer, it enters the storage module 5 located below the filter module 2 with a relatively stable flow state for centralized storage, thus forming a continuous treatment path of "flow guidance - filtration - sludge guidance - water storage".

[0039] See Figure 6As shown: The guiding module 3 is provided with a first guide chamber 31 and a first guide cavity 32, a second guide cavity 33 and a third guide cavity 34 that are radially opened from top to bottom in the first guide chamber 31 to guide foreign objects of different sizes.

[0040] By setting up the first guide cavity 32, the second guide cavity 33, and the third guide cavity 34 respectively, and making them spatially matched with the corresponding filtration unit 21, impurities of different particle size ranges can directly enter the corresponding guide cavity after being filtered. Each guide cavity forms a graded flow path from top to bottom or from inside to outside in terms of structure, so that impurities of different particle sizes do not cross-flow after entering the guide cavity, thereby avoiding the blockage of the transmission path of small particle size impurities by larger impurities. At the same time, the directional transport capability of impurities is further enhanced by the tilting or guiding structure of the guide cavity, so that they can quickly leave the filtration area under the action of water flow or gravity.

[0041] See Figure 7 As shown: The filtration unit 21 is provided with multiple coaxially arranged first filtration chambers 211, second filtration chambers 212 and third filtration chambers 213 that can perform multi-stage filtration of rainwater, and a linkage cable 214 that can lift the first filtration chamber 211 by the weight of the rainwater when the rainfall is heavy; the first filtration chamber 211 and the third filtration chamber 213 are connected by the linkage cable 214.

[0042] The filtration unit 21 further includes a guide rod 218 that can axially guide the first filtration chamber 211, the second filtration chamber 212 and the third filtration chamber 213. The guide rod 218 is coaxially fixed in the drainage module 1 and is located near its bottom. The linkage cable 214 is disposed in the guide rod 218.

[0043] The first filter chamber 211 is designed with a relatively large self-weight structure. When not in operation or at low flow rates, it and the third filter chamber 213 sink together under gravity to a position lower than the corresponding guide cavity, thereby enclosing a temporary water storage space between the diversion module 1 and the filter chambers. This allows rainwater to be fully retained and pass through each filter chamber for fine filtration. The second filter chamber 212 is fixed on the guide rod 218 and is flush with the second guide cavity 33 to maintain the stability of the intermediate filtration stage. When the rainfall intensity increases, the third filter chamber 213 is displaced downward under the impact of water and the weight of the water. It then lifts the first filter chamber 211 upward through the linkage cable 214, making it dock with the first guide cavity 32. This allows large particles that were originally retained on the outside to be directly discharged into the corresponding guide cavity, preventing continuous accumulation and blockage of the filter holes.

[0044] The first filter chamber 211, the second filter chamber 212, and the third filter chamber 213 all adopt a hollow, open-bottom conical structure. This structure is beneficial in two ways: firstly, it helps to form a centripetal flow path under the action of water flow, reducing dead water areas; secondly, the conical surface guides the flow, making it easy for attached impurities to slide off. The outer wall of each filter chamber is densely covered with first through holes 217 for water outlet, and a gradient distribution with gradually increasing hole diameter from top to bottom is formed along the water flow direction. This allows the upstream filter chamber to preferentially intercept large particles of impurities, the midstream filter chamber to intercept medium particles, and the downstream filter chamber to mainly filter fine particles. Thus, a continuous filtration system from coarse filtration to fine filtration is constructed in terms of structure, while avoiding the problem of single-pore structure being easily blocked by similar impurities.

[0045] See Figure 7 As shown: The filtration unit 21 further includes a water storage tank 215 and a transmission rod 216 capable of transmitting rainwater by its own weight to the third filtration chamber 213; two transmission rods 216 are provided, which are vertically arranged opposite each other on the third filtration chamber 213 and the rods pass through the second filtration chamber 212 and the first filtration chamber 211 and are arranged towards the inside of the diversion module 1; two water storage tanks 215 are provided, which are horizontally fixed on the top of the two transmission rods 216 respectively.

[0046] During heavy or continuous rainfall, when the diversion module 1 continuously introduces a large amount of rainwater, the rainwater first enters the water storage tank 215 to form a temporary water body. The water pressure is then effectively transmitted to the third filter chamber 213 through the transmission rod 216, causing it to undergo downward displacement. This displacement is synchronously converted into a lifting effect on the first filter chamber 211 through the linkage cable 214, allowing the first filter chamber 211 to maintain continuous communication with the first guide cavity 32. Even if its surface is covered with a large number of large particles of impurities, the impurities can still be quickly discharged laterally through the position lifting, thereby avoiding the filter surface being completely blocked. At the same time, the presence of the water storage tank 215 buffers the instantaneous large flow rate into a relatively stable outflow, which is beneficial to maintaining the continuous working state of the filter unit 21.

[0047] See Figure 7 As shown: The water storage tank 215 is a hollow double cone, and the upper and lower surfaces of the double cone are provided with second through holes 2151 for rainwater to enter and exit.

[0048] The upper and lower surfaces of the double-cone structure are respectively provided with second through holes 2151 of different diameters, wherein the diameter of the second through hole 2151 on the upper surface is larger than that on the lower surface. This causes the water flow entering the double cone to have a throttling and redistribution effect during the process, thereby reducing the local flow velocity and enhancing fluid stability. Combined with the temporary storage function of the water storage tank 215, rainwater is first treated by slow flow after entering the system, and then gradually released to the filtration unit 21. During this process, the water body's own weight and pressure changes generate a continuous lifting effect on the first filtration tank 211, keeping it stably maintained in the position connected to the first guide cavity 32, thereby ensuring the continuous opening of the sewage guide path.

[0049] See Figure 7 As shown: The first filter compartment 211 is also provided with an inclined guide strip 219 that can guide foreign objects in the air; the guide strip 219 is inclinedly provided on the outer wall of the first filter compartment 211 and multiple of them are provided circumferentially along the axis of the first filter compartment 211.

[0050] Multiple guide strips 219 are arranged circumferentially on the outer wall of the first filter chamber 211, so that rainwater forms a diversion channel when it flows through the outer surface of the filter chamber, thereby guiding the leaves and flaky debris attached to the surface to a specific flow path and preventing them from forming a surface cover in the filter hole area. By changing the local flow direction and flow velocity distribution, the guide strips 219 cause foreign objects to move along the direction of the guide strips 219 under the action of water flow and gradually leave the filter area, and finally be guided into the first guide cavity 32, realizing the active export of large-sized foreign objects.

[0051] See Figure 6 As shown: The sludge collection module 4 is provided with a second flow guiding chamber 41 and a fourth guide cavity 42, a fifth guide cavity 43 and a sixth guide cavity 44, which are opened in the second flow guiding chamber 41 and are arranged in a one-to-one correspondence with the first guide cavity 32, the second guide cavity 33 and the third guide cavity 34, as well as a sludge collection basket 45 that can finally collect foreign objects; the second flow guiding chamber 41 is coaxially arranged below the guide module 3; the sludge collection basket 45 is coaxially arranged in the second flow guiding chamber 41 and communicates with the fourth guide cavity 42, the fifth guide cavity 43 and the sixth guide cavity 44.

[0052] After the rainwater completes the filtration process, impurities of different particle sizes enter the first guide cavity 32, the second guide cavity 33, and the third guide cavity 34 respectively, and are further guided into the corresponding fourth guide cavity 42, the fifth guide cavity 43, and the sixth guide cavity 44 under the action of their respective guide paths, forming a multi-stage transmission path from primary guidance to secondary collection. During this process, a semi-closed flow channel is formed between each guide cavity to prevent impurities from re-entering the mainstream water body during the transmission process. Finally, all impurities are uniformly collected into the sludge collection basket 45 under the push of gravity and water flow, realizing centralized collection and subsequent cleaning.

[0053] See Figure 3 , Figure 4 and Figure 6 As shown: The storage module 5 includes a sedimentation chamber 51 capable of storing rainwater, a suction pipe 52 capable of extracting rainwater, and a partition plate 53 capable of confining the suction pipe 52 within the bottom of the sedimentation chamber 51.

[0054] The sedimentation chamber 51 adopts a hollow cylindrical structure with an open top. A baffle 53 is set at the bottom inside to limit the suction end of the suction pipe 52, so that the suction port is always kept at a predetermined distance from the bottom of the sedimentation chamber 51. This avoids disturbing or directly sucking in the sediment that has settled at the bottom when extracting the upper layer of clear water. This creates a spatial separation between the sedimentation area and the water intake area, which is beneficial to maintaining sedimentation stability and extending the cleaning cycle.

[0055] A method for continuous rainwater harvesting in municipal engineering projects, employing a continuous rainwater harvesting device for municipal engineering projects, includes the following steps:

[0056] S1: First, place the recycling equipment at the drainage node. When it rains, the rainwater introduced by the diversion module 1 is sequentially introduced into the first filter chamber 211, the second filter chamber 212 and the third filter chamber 213. Through the different diameter through holes set on the outer wall of each filter chamber, the filtration is achieved from coarse to fine. Large particles are preferentially intercepted in the upstream filter chamber, and medium and fine particles are sequentially transferred downstream and separated by the corresponding filter chamber. At the same time, the conical chamber structure is used to promote the sliding and falling off of attached impurities during the filtration process.

[0057] S2: After the foreign matter is intercepted in each filter chamber, the first guide chamber 32, the second guide chamber 33 and the third guide chamber 34, which are set in accordance with the filter chamber, guide the impurities of different particle sizes respectively, so that they enter the corresponding guide channels under the action of water flow and gravity, and are further transported to the corresponding guide chamber downstream, so as to realize the graded transport of foreign matter in different paths and avoid cross-flow and backflow.

[0058] S3: According to the change in rainfall intensity, the third filter chamber 213 undergoes axial displacement under water pressure, and drives the first filter chamber 211 to perform reverse displacement adjustment via the linkage cable 214. Under low flow conditions, the first filter chamber 211 is in a submerged position to form a water storage space, and under high flow conditions, the first filter chamber 211 moves upward and connects with the first guide cavity 32, thereby directly discharging larger foreign objects accumulated on its surface and keeping the filtration channel unobstructed.

[0059] S4: When the rainfall is heavy, the introduced rainwater is first directed into the water storage tank 215 for temporary storage. The slow flow structure reduces the impact of the water flow and forms a stable water pressure. At the same time, the weight of the water body applies a continuous force to the third filter chamber 213, thereby maintaining the connection between the first filter chamber 211 and the first guide cavity 32, so that the filtration and sewage guiding process can be carried out continuously, avoiding filter failure due to excessive instantaneous flow.

[0060] S5: Finally, impurities of different diameters are transported to the collection basket 45 through the guide chambers of each stage, realizing the centralized collection and subsequent cleaning of foreign objects of different particle sizes; while the rainwater after multi-stage filtration is finally introduced into the sedimentation chamber 51 for static settling, so that fine particles are deposited at the bottom under the action of gravity, and the position of the suction end of the suction pipe 52 is controlled by the set baffle 53, so that the water pumping process prioritizes the extraction of the upper layer of clean water and avoids disturbing the bottom sediment, thereby completing the stable recovery and output of rainwater.

[0061] This invention can automatically adjust the rainwater collection state according to different rainfall amounts, resulting in high rainwater collection efficiency and good effect.

[0062] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A continuous rainwater harvesting device for municipal engineering, characterized in that, include: Traffic generation module; The filtering module is coaxially fixedly installed inside the drainage module, and the filtering module is equipped with a filtering unit that can perform multi-stage filtering of foreign objects in rainwater. A guiding module is coaxially fixed outside the drainage module to guide foreign objects and rainwater. A dirt collection module is located at the bottom of the guide module and is connected to the outlet end of the guide module. The dirt collection module is equipped with a second flow chamber that can guide foreign objects and a dirt collection basket that can collect foreign objects. The storage module is coaxially fixed inside the dirt collection module and located below the filtration module to temporarily store the filtered rainwater.

2. The rainwater continuous recycling device for municipal engineering according to claim 1, characterized in that, The guiding module is provided with a first guide chamber and a first guide cavity, a second guide cavity, and a third guide cavity, which are radially opened from top to bottom in the first guide chamber and can guide foreign objects of different sizes.

3. A continuous rainwater harvesting device for municipal engineering according to claim 2, characterized in that, The filtration unit is equipped with multiple coaxially arranged first filtration chambers, second filtration chambers and third filtration chambers that can filter rainwater in multiple stages, as well as a linkage cable that can lift the first filtration chamber by the weight of the rainwater when the rainfall is heavy. The first filter compartment and the third filter compartment are connected by the linkage cable.

4. A continuous rainwater harvesting device for municipal engineering according to claim 3, characterized in that, The filtration unit also includes a water storage tank and a transmission rod that can transfer rainwater by its own weight to the third filtration chamber. Two guide rods are provided, and the two guide rods are vertically arranged opposite each other on the third filter compartment, with the rod parts passing through the second filter compartment and the first filter compartment and facing into the flow diversion module; There are two water storage tanks, which are horizontally fixed on the top of the two transmission rods.

5. A continuous rainwater harvesting device for municipal engineering according to claim 4, characterized in that, The water storage tank is a hollow double cone, and both the upper and lower surfaces of the double cone are provided with second through holes for rainwater to enter and exit.

6. A continuous rainwater harvesting device for municipal engineering according to claim 3, characterized in that, The first filter compartment is also equipped with guide strips that can guide foreign objects in an elevated manner; The guide strips are inclinedly disposed on the outer wall of the first filter compartment and are arranged in multiple circumferentially along the axis of the first filter compartment.

7. A continuous rainwater harvesting device for municipal engineering according to claim 1, characterized in that, The sludge collection module is provided with a second guide chamber and a fourth guide chamber, a fifth guide chamber and a sixth guide chamber, which are opened in the second guide chamber and are arranged one-to-one with the first guide chamber, the second guide chamber and the third guide chamber, as well as a sludge collection basket that can ultimately collect foreign objects; The second flow guide chamber is coaxially disposed below the guide module; The sludge collection basket is coaxially disposed in the second guide chamber and communicates with the fourth guide chamber, the fifth guide chamber and the sixth guide chamber.

8. A continuous rainwater harvesting device for municipal engineering according to claim 1, characterized in that, The storage module includes a sedimentation chamber for storing rainwater, a suction pipe for extracting rainwater, and a partition plate for confining the suction pipe to the bottom of the sedimentation chamber.

9. A method for continuous rainwater harvesting in municipal engineering, applied to a continuous rainwater harvesting device for municipal engineering as described in any one of claims 1-8, comprising the following steps: S1: First, place the recycling equipment at the drainage node. When it rains, the rainwater introduced by the diversion module is introduced into the first filter chamber, the second filter chamber and the third filter chamber in sequence. Through the different diameter through holes set on the outer wall of each filter chamber, the filter is filtered from coarse to fine in stages. Large particles are preferentially intercepted in the upstream filter chamber, while medium and fine particles are transferred downstream and separated by the corresponding filter chamber. At the same time, the conical chamber structure is used to promote the sliding and falling off of attached impurities during the filtration process. S2: After the foreign matter is intercepted in each filter compartment, the first guide chamber, the second guide chamber and the third guide chamber, which are set in accordance with the filter compartment, guide the impurities of different particle sizes separately, so that they enter the corresponding guide channel under the action of water flow and gravity, and are further transported to the corresponding guide chamber downstream, realizing the graded transport of foreign matter in different paths, avoiding cross-flow and backflow. S3: According to the change in rainfall intensity, the third filter chamber undergoes axial displacement under water pressure, and drives the first filter chamber to make reverse displacement adjustment via the linkage cable. Under low flow conditions, the first filter chamber is in a sinking position to form a water storage space. Under high flow conditions, the first filter chamber moves upward and connects with the first guide cavity, thereby directly exporting larger foreign objects accumulated on its surface and keeping the filtration channel unobstructed. S4: When the rainfall is heavy, the introduced rainwater is first directed into the water storage tank for temporary storage. The slow flow structure reduces the impact of the water flow and forms a stable water pressure. At the same time, the weight of the water body applies a continuous force to the third filter chamber, thereby maintaining the connection between the first filter chamber and the first guide cavity, so that the filtration and pollution guiding process can be carried out continuously, avoiding filter failure due to excessive instantaneous flow. S5: Finally, impurities of different diameters are transported to the collection basket through the guide chambers of each stage, realizing the centralized collection and subsequent cleaning of foreign objects of different particle sizes; while the rainwater after multi-stage filtration is finally introduced into the sedimentation chamber for static settling, so that fine particles are deposited at the bottom under the action of gravity, and the position of the suction end of the suction pipe is controlled by the set baffle, so that the water pumping process prioritizes the upper layer of clear water and avoids disturbing the bottom sediment, thereby completing the stable recovery and output of rainwater.

Images