Sponge city rainwater purification structure

Abstract

The application discloses a sponge city rainwater purification structure and relates to the technical field of sewage treatment. The sponge city rainwater purification structure comprises an upper water guide, a main body and a primary filter device. The main body comprises an outer shell, a filter cylinder, a filter core assembly, an inner water guide and a driving motor. The filter cylinder is fixed inside the outer shell. The driving motor is used for driving the filter core assembly to rotate. The primary filter device comprises a connecting rod and a conical filter screen. The connecting rod is a vertical straight rod. The bottom end of the connecting rod is fixed to the top center of the filter core assembly. The conical filter screen is a hollow cone with an open bottom. One end of the connecting rod, which is away from the filter core assembly, is connected to the center of the bottom surface of the conical filter screen. The conical filter screen is located between the upper water guide and the outer shell. In the initial state, the diameter of the opening at the bottom surface of the conical filter screen is larger than the diameter of the liquid inlet. The bottom surface of the conical filter screen abuts against the outer wall at the top end of the outer shell. The sponge city rainwater purification structure can reduce the probability of the conical filter screen being blocked, make the amount of rainwater passing through the conical filter screen relatively stable, and improve the efficiency of rainwater collection.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a rainwater purification structure for sponge cities. Background Technology

[0002] Sponge cities refer to solutions to the problems caused by traditional rainwater management technologies by using the source control concepts of retention, diversion, infiltration, and purification. While ensuring urban drainage and flood control safety, they aim to maximize the accumulation, infiltration, and purification of rainwater in urban areas, promoting the utilization of rainwater resources and ecological environmental protection. Rainwater purification systems are a crucial component of sponge cities. If rainwater is not filtered, it will carry impurities and sediment directly into rainwater wells, burdening them and clogging pipes, ultimately rendering the wells ineffective.

[0003] Existing technologies typically utilize wastewater treatment devices to treat rainwater. For example, Chinese invention patent CN113023923B discloses a prefabricated, environmentally friendly rainwater recycling and collection device, comprising a shell, a filter chamber, a filter element, a filter cleaning head, and a drive mechanism. The filter chamber is assembled and connected within the shell for rainwater collection and introduction, as well as for the installation of the filter element. The filter element is movably assembled within the filter chamber for rainwater filtration. The filter cleaning head is assembled and connected to one end of the filter chamber and is movably adapted to the filter element for anti-clogging maintenance. The drive mechanism is driven and connected to one end of the filter cleaning head, facilitating the assembly of components through detachment and providing stable transmission to the filter cleaning head. After initial filtration by the filter cleaning head, the rainwater enters the filter element for adsorption filtration. The drive mechanism drives the filter cleaning head to rotate, preventing clogging of the initial filter and also preventing clogging of the adsorption filtration within the filter element. This allows for environmentally friendly and efficient rainwater recycling and collection, and is flexible and convenient to use.

[0004] However, if too many foreign objects (such as leaves, packaging bags, etc.) or too much mud clog the filter head during the use of the above device, the amount of rainwater passing through will decrease, resulting in low rainwater collection efficiency. Summary of the Invention

[0005] This application provides a rainwater purification structure for sponge cities, which solves the technical problem in the prior art where excessive foreign matter or mud clogs the filter head, reducing the amount of rainwater passing through the filter head and resulting in low rainwater collection efficiency. It achieves the technical effect of reducing the probability of the conical filter screen being clogged, making the amount of rainwater passing through the conical filter screen more stable, and making the rainwater collection efficiency more uniform.

[0006] This application provides a rainwater purification structure for sponge cities, including an upper water intake hopper, a main body, and a primary filtration device; the main body includes a shell, a filter cylinder, a filter element assembly, an inner water intake hopper, and a drive motor; the filter cylinder is generally cylindrical and is fixed inside the shell; a circular liquid inlet is provided at the center of the top of the shell;

[0007] The inner water inlet hopper has an overall bucket-shaped structure that is larger at the top and smaller at the bottom. The lower opening of the inner water inlet hopper is rotatably fitted onto the top outer wall of the filter element assembly, and the upper opening of the inner water inlet hopper is fixed to the top inner wall of the filter cylinder. The upper water inlet hopper has an overall bucket-shaped structure that is larger at the top and smaller at the bottom, and the upper water inlet hopper is fixed to the top of the outer shell by multiple brackets. The drive motor is used to drive the filter element assembly to rotate.

[0008] The primary filtration device includes a connecting rod and a conical filter screen; the connecting rod is a vertically arranged straight rod, and its bottom end is fixed to the center of the top of the filter element assembly; the conical filter screen is a hollow cone with an open bottom; the end of the connecting rod away from the filter element assembly is connected to the center of the bottom surface of the conical filter screen; the conical filter screen is located between the upper water inlet and the outer shell, and in the initial state, the diameter of the bottom opening of the conical filter screen is larger than the diameter of the liquid inlet, and the bottom surface of the conical filter screen abuts against the outer wall of the top of the outer shell.

[0009] Furthermore, the outer shell is a hollow cylinder with its central axis vertically positioned. The main body also includes support legs and brush assemblies. Multiple support legs are fixed to the bottom surface of the outer shell for supporting it. The two ends of the filter cylinder are fixed to the inner walls of the top and bottom of the outer shell, respectively. The side walls of the filter cylinder are densely covered with through holes. There are two brush assemblies, which are symmetrically fixed in the space between the filter cylinder and the filter element assembly, with the brushes in the brush assemblies abutting against the outer wall of the filter element assembly. The filter element assembly is located inside the filter cylinder, and its bottom end is rotatably connected to the inner wall of the bottom of the outer shell. The upper opening of the upper water inlet is used to collect rainwater, and the lower opening of the upper water inlet corresponds to the liquid inlet on the outer shell. The drive motor is fixed to the center of the bottom of the outer shell, and the rotating shaft of the drive motor passes through the outer shell and is fixedly connected to the center of the bottom of the filter element assembly.

[0010] Furthermore, the top of the connecting rod is not lower than the bottom of the upper water inlet, and the shortest distance between the bottom of the upper water inlet and the side wall of the conical filter screen in the initial state is 10 to 20 centimeters; the central axes of the outer shell, filter cylinder, and filter element assembly are located on the same straight line; the bottom opening diameter of the upper water inlet is not greater than the diameter of the liquid inlet; the radius of the liquid inlet is smaller than the inner radius of the filter cylinder and larger than the outer radius of the filter element assembly.

[0011] Furthermore, the conical filter screen is composed of multiple fan-shaped screens, with the number of fan-shaped screens being 4 to 8. The top of the fan-shaped screens is hinged to the top of the connecting rod, and in the initial state, the bottom of the fan-shaped screens abuts against the outer wall of the top of the outer shell.

[0012] Furthermore, the fan-shaped mesh can rotate up and down relative to the connecting rod. When the connecting rod drives the conical filter to rotate and the rotation speed increases, the fan-shaped mesh rotates upward under the action of centrifugal force. When the rotation speed of the conical filter decreases, the fan-shaped mesh rotates downward under the action of gravity. The position of the fan-shaped mesh is controlled by controlling the rotation speed of the conical filter, so that the fan-shaped mesh can vibrate up and down.

[0013] Furthermore, a connecting mesh is detachably fixed between two adjacent fan-shaped meshes. The connecting mesh is made of elastic rubber and is used to prevent foreign objects from entering the outer casing through the gap between the two fan-shaped meshes.

[0014] Furthermore, the maximum width of the stretched connecting net is greater than the shortest distance between the upper water inlet and the outer shell.

[0015] Furthermore, a traction rope is fixed at the middle position of each of the fan-shaped nets near the upper water inlet, and a counterweight is fixed at the other end of the traction rope; the length of the traction rope is one-half to one-third of the radius of the fan-shaped net; the traction rope is made of stainless steel rope; the mass of the counterweights on the multiple fan-shaped nets gradually decreases along the rotation direction of the connecting rod, and the mass of the smallest counterweight is one-half to one-third of the mass of the largest counterweight.

[0016] Furthermore, the counterweight is ellipsoidal in shape, and its major axis is aligned with the length of the traction rope; the counterweight is made of permanent magnet, and its magnetic poles are located at both ends of its major axis.

[0017] Furthermore, the traction rope is equipped with multiple sliding magnetic posts, each of which is cylindrical, and the traction rope slides through the central axis of the sliding magnetic post. When the traction rope is taut, adjacent sliding magnetic posts on the same traction rope repel each other, and the counterweight repels adjacent sliding magnetic posts. The fan-shaped mesh is made of martensitic stainless steel, allowing it to be magnetically attracted by the counterweight and the sliding magnetic posts. The mass of each sliding magnetic post is no more than half the mass of the smallest counterweight.

[0018] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0019] This invention provides a sponge city rainwater mitigation structure including a pre-filtration device. The pre-filtration device includes a connecting rod and a conical filter screen. The bottom end of the connecting rod is fixed to the top center of the filter element assembly. The conical filter screen is a hollow cone with an open bottom. The end of the connecting rod away from the filter element assembly is connected to the center of the bottom surface of the conical filter screen. The conical filter screen is located between the upper water inlet and the outer shell. In the initial state, the diameter of the bottom opening of the conical filter screen is larger than the diameter of the liquid inlet, and the bottom surface of the conical filter screen abuts against the outer wall of the top of the outer shell. This effectively solves the technical problem in the prior art where excessive foreign matter or mud clogs the filter cleaning head, reducing the amount of rainwater passing through the filter cleaning head and resulting in low rainwater collection efficiency. This reduces the probability of the conical filter screen being clogged, making the amount of rainwater passing through the conical filter screen more stable and the rainwater collection efficiency more uniform. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the sponge city rainwater purification structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the conical filter screen of the sponge city rainwater purification structure of the present invention;

[0022] Figure 3 This is a top view schematic diagram of the conical filter screen of the sponge city rainwater purification structure of the present invention;

[0023] Figure 4 This is a top view schematic diagram of the filter cylinder of the sponge city rainwater purification structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the conical filter structure of the sponge city rainwater purification structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the fan-shaped mesh when the conical filter screen of the sponge city rainwater mitigation structure of the present invention rotates;

[0026] Figure 7 This is a top view of the fan-shaped mesh when the conical filter screen of the sponge city rainwater mitigation structure of the present invention rotates;

[0027] Figure 8 This is a schematic diagram of the counterweight of the sponge city rainwater purification structure of the present invention;

[0028] Figure 9 This is a schematic diagram showing the positions of the fan-shaped mesh and counterweight after the connecting rod of the sponge city rainwater purification structure of the present invention is rotated.

[0029] Figure 10 This is a schematic diagram showing the position of the sliding magnetic column in the sponge city rainwater purification structure of the present invention.

[0030] In the picture:

[0031] 100mm upper water intake bucket, 110mm support frame;

[0032] Main body 200, outer shell 210, support legs 220, filter cartridge 230, brush assembly 240, filter element assembly 250, inner water hopper 260, drive motor 270;

[0033] The components include a primary filter 300, a connecting rod 310, a conical filter screen 320, a fan-shaped screen 321, a connecting net 322, a traction rope 323, a counterweight 324, and a sliding magnetic column 325. Detailed Implementation

[0034] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0035] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] Example 1

[0038] like Figures 1 to 4As shown, the sponge city rainwater extraction structure of this application includes an upper water intake hopper 100, a main body 200, a primary filtration device 300, a power component, and a control unit; the main body 200 includes a shell 210, support legs 220, a filter cylinder 230, a brush assembly 240, a filter element assembly 250, an inner water intake hopper 260, and a drive motor 270; the shell 210 is a hollow cylinder, with its central axis vertically arranged, and multiple support legs 220 fixed to the bottom surface of the shell 210 for supporting the shell 210; the filter cylinder 230 is a cylindrical tube, fixed inside the shell 210, with its two ends fixed to the inner walls of the top and bottom of the shell 210, respectively; The filter cartridge 230 has numerous through holes on its side wall; the filter element assembly 250 is located inside the filter cartridge 230, and its bottom end is rotatably connected to the bottom inner wall of the outer shell 210; there are two brush assemblies 240, which are symmetrically fixed in the space between the filter cartridge 230 and the filter element assembly 250, with the brushes in the brush assemblies 240 abutting against the outer wall of the filter element assembly 250; the filter element assembly 250 is composed of a cylindrical metal filter screen filled with activated carbon particles. Both the filter element assembly 250 and the brush assembly 240 are existing technologies and will not be described in detail here; the central axes of the outer shell 210, the filter cartridge 230, and the filter element assembly 250 are located on the same straight line. The outer shell 210 has a circular liquid inlet at its top center. The radius of the liquid inlet is smaller than the inner radius of the filter cylinder 230 and larger than the outer radius of the filter element assembly 250. The inner water inlet 260 has a bucket-shaped structure that is larger at the top and smaller at the bottom. The lower opening of the inner water inlet 260 is rotatably fitted onto the outer wall of the top of the filter element assembly 250, and the upper opening of the inner water inlet 260 is fixed to the inner wall of the top of the filter cylinder 230. The upper water inlet 100 has a bucket-shaped structure that is larger at the top and smaller at the bottom, and the upper water inlet 100 is fixed above the outer shell 210 by multiple supports 110. The upper opening of the upper water inlet 100 is used to collect rainwater, and the lower opening of the upper water inlet 100 corresponds to the liquid inlet on the outer shell 210. The diameter of the bottom opening of the filter element assembly 250 is not greater than the diameter of the liquid inlet; the drive motor 270 is fixed at the bottom center of the housing 210, and the rotating shaft of the drive motor 270 passes through the housing 210 and is fixedly connected to the bottom center of the filter element assembly 250, for driving the filter element assembly 250 to rotate; the primary filtration device 300 includes a connecting rod 310 and a conical filter screen 320; the connecting rod 310 is a vertically arranged straight rod, and the bottom end of the connecting rod 310 is fixed at the top center of the filter element assembly 250; the conical filter screen 320 is a hollow cone with an open bottom, and the conical filter screen 320 is a metal filter screen structure; the end of the connecting rod 310 away from the filter element assembly 250 is connected to the bottom center of the conical filter screen 320;The conical filter screen 320 is located between the upper water inlet 100 and the outer casing 210. Initially, the diameter of the bottom opening of the conical filter screen 320 is larger than the diameter of the liquid inlet, and the bottom surface of the conical filter screen 320 abuts against the outer wall of the top of the outer casing 210. The top of the connecting rod 310 is not lower than the bottom of the upper water inlet 100, and initially, the shortest distance between the bottom of the upper water inlet 100 and the side wall of the conical filter screen 320 is 10 to 20 centimeters.

[0039] The power component is used to supply power for the operation of the purification structure, preferably an AC power source or a battery; the control unit is used to control the coordinated operation of the various components of the purification structure, preferably a programmable logic controller; both are existing technologies and will not be described in detail here.

[0040] Preferred, such as Figure 1 As shown, rainwater falls onto the conical filter screen 320 through the upper water inlet 100 for initial filtration. Foreign objects or mud in the rainwater remain on the surface of the conical filter screen 320. The rainwater then enters the filter element assembly 250 for adsorption and filtration. The drive motor 270 drives the filter element assembly 250 to rotate. During the rotation of the filter element assembly 250, the conical filter screen 320 is rotated through the connecting rod 310. Under the action of centrifugal force, some foreign objects or mud on the conical filter screen 320 are thrown out. At the same time, the treated rainwater inside the filter element assembly 250 can be better thrown out under the action of centrifugal force, improving the treatment efficiency. The drive motor 270 is intermittently started, for example, it starts to rotate after being stationary for 1 hour, and the rotation time is 15 minutes, and then it decelerates to stop.

[0041] Ideally, the time it takes for a foreign object to be ejected is related to the centrifugal force it experiences on the conical filter 320. The magnitude of the centrifugal force depends on the motor speed, the length of the connecting rod 310, and the mass of the foreign object. Assuming the motor speed remains constant, the magnitude of the centrifugal force will primarily depend on the length of the connecting rod 310 and the mass of the foreign object. Because this embodiment incorporates the conical filter 320, at the same rotational speed, the centrifugal force on the foreign object will increase, resulting in it being ejected more quickly.

[0042] During operation, the foreign object removal process was simulated multiple times. The rotation speed of the drive motor 270 was set to 30 revolutions per minute. The foreign object on the conical filter 320 was a wet clump of leaves (weighing approximately 50 grams). During operation, a spray nozzle was used to simulate a rainy environment. After the drive motor 270 rotated, when the conical filter 320 was not introduced (as in the filter cleaning head of the prior art), the time required for the foreign object to be completely removed was 50 to 73 seconds. When the conical filter 320 was introduced, and the side of the conical filter 320 was tilted at an angle of 30 degrees relative to the bottom surface, the time required for the foreign object to be completely removed was 35 to 58 seconds, which reduced the time by approximately 20% to 30%.

[0043] It should be noted that the time saving calculation provided here is based only on the purification process under the conditions set in this embodiment. The actual time saving may be affected by other factors, such as the operation method, rainfall, and environment.

[0044] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0045] 1. By introducing a conical filter screen 320 as a pre-filtration device 300, a dual filtration system is formed with the original filter element assembly 250. This design can more effectively remove foreign objects and mud from rainwater and improve the filtration effect.

[0046] 2. The drive motor 270 not only drives the filter element assembly 250 to rotate, but also drives the conical filter screen 320 to rotate through the connecting rod 310. Under the action of centrifugal force, some foreign objects or mud on the conical filter screen 320 are thrown out / shaken out, thereby realizing the self-cleaning function, reducing the possibility of clogging, and achieving the technical effect of reducing the probability of the conical filter screen 320 being clogged, making the amount of rainwater passing through the conical filter screen 320 more stable and the rainwater collection efficiency more uniform.

[0047] 3. Due to the rotation of the filter element assembly 250, the treated rainwater can be better ejected under the action of centrifugal force, thereby improving the rainwater treatment efficiency.

[0048] 4. The operation of the purification structure can be easily controlled through the control unit, realizing automated and intelligent management, which improves the flexibility and convenience of use.

[0049] Example 2

[0050] In the above embodiments, when the mud or foreign objects that may be present on the conical filter 320 are stubborn and difficult to be thrown out under the action of centrifugal force, the number of blocked positions on the conical filter 320 will gradually increase, and the rainwater purification process will be affected; the embodiments of this application are based on the above embodiments with certain optimizations.

[0051] like Figure 5 As shown, the conical filter screen 320 is composed of multiple fan-shaped screens 321, with the number of fan-shaped screens 321 ranging from 4 to 8. The top end of each fan-shaped screen 321 is hinged to the top end of the connecting rod 310, and in the initial state, the bottom end of each fan-shaped screen 321 abuts against the outer wall of the top end of the outer casing 210. Preferably, the number of fan-shaped screens 321 is 6.

[0052] like Figure 5 and Figure 6As shown, the fan-shaped mesh 321 can rotate up and down relative to the connecting rod 310. When the connecting rod 310 drives the conical filter 320 to rotate and the rotation speed increases, the fan-shaped mesh 321 rotates upward under the action of centrifugal force. When the rotation speed of the conical filter 320 decreases, the fan-shaped mesh 321 rotates downward under the action of gravity. By controlling the rotation speed of the conical filter 320, the position of the fan-shaped mesh 321 is controlled, so that the fan-shaped mesh 321 can vibrate up and down, shaking off the mud or foreign objects on the upper end of the fan-shaped mesh 321.

[0053] Furthermore, such as Figure 7 As shown, a connecting mesh 322 is detachably fixed between two adjacent fan-shaped meshes 321. The connecting mesh 322 is made of elastic rubber and is used to prevent foreign objects from entering the outer casing 210 through the gap between the two fan-shaped meshes 321.

[0054] Preferably, the maximum width of the stretched connecting net 322 is greater than the shortest distance between the upper water inlet 100 and the outer shell 210.

[0055] The fan-shaped screen 321 vibrates up and down by controlling the rotation speed of the conical filter screen 320; the higher the rotation speed, the greater the centrifugal force, and the vibration frequency and amplitude of the fan-shaped screen 321 will also increase accordingly; this will help to shake off the adhering foreign objects or mud more quickly; in this embodiment, the rotation speed of the drive motor 270 changes continuously around a vertical range.

[0056] Further verification was conducted based on the simulation of Example 1. During the verification process, the rotational speed of the drive motor 270 varied between 20 and 40 revolutions per minute. Under multiple tests, due to the vibration of the fan-shaped mesh 321, the foreign objects continuously moved and dispersed under their own gravity, centrifugal force, and inertia. The time required for the foreign objects to be completely thrown out was 20 to 25 seconds, which was reduced by approximately 45% to 60% compared to Example 1. Similarly, for sticky mud, the optimized design may significantly reduce its adhesion time, thereby improving the overall rainwater purification efficiency.

[0057] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0058] 1. The conical filter screen 320, composed of multiple fan-shaped meshes 321, can dynamically adjust the effective filtration area according to the rotation speed. When the rotation speed increases, the fan-shaped meshes 321 rotate upward, the effective filtration area decreases, but the centrifugal force increases, which helps to throw off attached foreign objects or mud. When the rotation speed decreases, the fan-shaped meshes 321 rotate downward, the effective filtration area increases, and more impurities in the rainwater can be intercepted.

[0059] 2. By controlling the rotation speed of the conical filter 320, the up-and-down vibration of the fan-shaped filter 321 can be controlled more effectively. This vibration helps to shake off the mud or foreign objects attached to the upper part of the fan-shaped filter 321, further improving the self-cleaning ability and reducing the risk of clogging.

[0060] 3. The detachable and fixed connecting mesh 322 between two adjacent fan-shaped meshes 321 effectively prevents foreign objects from entering the housing 210 through the gap between the two fan-shaped meshes 321, enhancing the filtration effect. The elastic rubber material of the connecting mesh 322 also allows for a certain degree of deformation to adapt to the change in distance between the fan-shaped meshes 321 at different speeds.

[0061] 4. The design of the fan-shaped mesh 321 and the connecting mesh 322 makes the entire conical filter 320 more flexible in structure, which can adapt to different rainfall and impurity loads, and improves the adaptability of the purification structure.

[0062] Example 3

[0063] In the above embodiments, when some irregularly shaped or material foreign objects (such as sticky substances, lightweight floating objects, etc.) block the fan-shaped mesh 321, it is difficult to throw out these foreign objects by centrifugal force and vibration alone, and there is still room for further optimization; the embodiments of this application are based on the above embodiments and have made certain optimizations.

[0064] like Figure 8 As shown, a traction rope 323 is fixed at the middle position of one end of each fan-shaped net 321 near the upper water inlet 100, and a counterweight 324 is fixed at the other end of the traction rope 323; the length of the traction rope 323 is one-half to one-third of the radius of the fan-shaped net 321; the material of the traction rope 323 is stainless steel rope; the mass of the counterweights 324 on the multiple fan-shaped nets 321 gradually decreases along the rotation direction of the connecting rod 310, and the mass of the smallest counterweight 324 is one-half to one-third of the mass of the largest counterweight 324.

[0065] Preferably, the counterweight 324 in this embodiment is spherical.

[0066] like Figure 9As shown, after the connecting rod 310 drives the conical filter screen 320 to rotate, since the counterweights 324 on each sector screen 321 have different masses, the sector screen 321 corresponding to the heavier counterweight 324 moves upward by a smaller margin than the sector screen 321 corresponding to the lighter counterweight 324. Therefore, the positions of the multiple sector screens 321 are distributed in a stepped manner, and the mud or foreign objects on the sector screens 321 will move from the higher sector screens 321 to the lower sector screens 321 under the action of centrifugal force. Finally, the tendency to detach from the conical filter 320 reduces the probability of foreign objects being blocked by the upper water inlet 100, and makes the detachment process of foreign objects or mud smoother. When the rotation speed of the conical filter 320 increases and decreases, under the action of inertia, the counterweight 324 drives the traction rope 323 to sweep in a fan-shaped area on the fan-shaped net 321, which can more effectively sweep out foreign objects and mud on the fan-shaped net 321, and can remove some irregularly shaped or material foreign objects (such as sticky substances, light floating objects, etc.).

[0067] Further verification was conducted based on the simulation of Example 2. During the verification process, without the introduction of the traction rope 323 and the counterweight 324, a specific sticky foreign object (chewing gum) required approximately 5 minutes to be thrown off or shaken off by centrifugal force, vibration, and the scouring effect of water. With the introduction of the dynamic cleaning action of the traction rope 323 and the counterweight 324, this sticky foreign object was effectively removed in approximately 2.5 to 4 minutes, reducing the time required by approximately 20% to 50%. Similarly, for lightweight floating objects (such as plastic bag fragments), the attachment time may also be significantly reduced.

[0068] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0069] 1. By setting counterweights 324 of different masses on different sector nets 321, the position height of each sector net 321 is distributed in a stepped manner when the cone filter 320 rotates. This design makes it easier for foreign objects or mud to move from the higher sector net 321 to the lower sector net 321 under the action of centrifugal force, and finally get off the cone filter 320 smoothly, reducing the probability of foreign objects being blocked by the upper water inlet 100.

[0070] 2. Due to the stepped distribution of the fan-shaped mesh 321, centrifugal force can be used more effectively to throw out foreign objects and mud, thereby improving filtration efficiency. At the same time, this design also helps to reduce clogging between the fan-shaped meshes 321, further ensuring smooth filtration.

[0071] 3. Compared with the previous solution, the position adjustment of the sector net 321 is achieved by the natural action of the counterweight 324, which reduces the dependence on the complex control system and lowers the technical implementation difficulty and cost.

[0072] 4. The traction rope 323 is made of stainless steel rope, which has high strength and corrosion resistance, ensuring the reliability and service life of the structure. At the same time, the entire optimization scheme achieves better filtration effect while maintaining a compact structure.

[0073] 5. During the rotation of the conical filter screen 320, the counterweight 324 can drive the traction rope 323 to sweep on the fan-shaped screen 321, which can more effectively sweep out foreign objects and mud.

[0074] Example 4

[0075] In the above embodiments, the counterweight 324 may detach from the area of ​​the corresponding sector mesh 321 under the action of centrifugal force, which may affect the self-cleaning function of the subsequent conical filter 320; the embodiments of this application are based on the above embodiments with certain optimizations.

[0076] like Figure 10 As shown, in this embodiment, the counterweight 324 is ellipsoidal in shape, and the major axis of the counterweight 324 is aligned with the length direction of the traction rope 323. The counterweight 324 is made of permanent magnet, and its magnetic poles are located at both ends of the major axis. The traction rope 323 is provided with multiple sliding magnetic posts 325, each being cylindrical. The traction rope 323 slides along the central axis of the sliding magnetic post 325. When the traction rope 323 is taut, adjacent sliding magnetic posts 325 on the same traction rope 323 repel each other, and the counterweight 324 repels adjacent sliding magnetic posts 325. The fan-shaped mesh 321... The material is martensitic stainless steel, which allows the fan-shaped mesh 321 to be magnetically attracted by the counterweight 324 and the sliding magnetic column 325. The mass of the sliding magnetic column 325 is no more than half the mass of the smallest counterweight 324. When the traction rope 323 is taut, the sliding magnetic column 325 abuts against the fan-shaped mesh 321. When the conical filter screen 320 rotates and the speed increases, the traction rope 323 is taut, and under the action of centrifugal force, the two adjacent sliding magnetic columns 325 move closer to each other. When the speed decreases, the two adjacent sliding magnetic columns 325 move away from each other under the action of magnetic force, so that the sliding magnetic column 325 can cooperate with the traction rope 323 to sweep away mud or foreign objects on the fan-shaped mesh 321.

[0077] Further verification was conducted based on the simulation of Example 3. During the verification process, without the introduction of the sliding magnetic post 325, a specific sticky foreign object (chewing gum) took approximately 4 minutes to be shaken off or dislodged. After introducing the solution in this example, due to the sliding magnetic post 325 and the enhanced magnetic cleaning effect, this sticky foreign object can be effectively removed within 2.8 to 3.6 minutes, reducing the time taken by approximately 10%. For other types of foreign objects (such as fibrous materials), the new design may also significantly reduce their adhesion time.

[0078] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0079] 1. The design of the ellipsoidal permanent magnet counterweight 324 and the sliding magnetic column 325 enables these magnetic elements to sweep away mud or foreign objects on the fan-shaped mesh 321 under the action of centrifugal force and magnetic force when the conical filter screen 320 rotates. This dynamic sweeping action helps to remove dirt attached to the fan-shaped mesh 321 more effectively, keep the filter surface clean, thereby improving filtration efficiency and extending the service life of the filter screen.

[0080] 2. The sliding magnetic columns 325 on the traction rope 323 can adaptively adjust their positions according to the rotational speed of the conical filter screen 320. When the rotational speed increases, centrifugal force causes the sliding magnetic columns 325 to move closer together, enhancing the sweeping effect on the fan-shaped mesh 321; when the rotational speed decreases, magnetic force causes the sliding magnetic columns 325 to move further apart, reducing the sweeping intensity. This adaptive adjustment capability allows the purification structure to maintain optimal filtration performance under different operating conditions.

[0081] 3. Through the dynamic sweeping action of the magnetic components, potential blockage points can be detected and cleared in a timely manner, thereby reducing the risk of blockage in the rainwater purification structure. This is of great significance for maintaining the smooth flow of the rainwater drainage system and extending the maintenance cycle.

[0082] 4. Under the magnetic attraction of the counterweight 324, the sliding magnetic column 325 and the fan-shaped mesh 321, the counterweight 324 is difficult to detach from the area of ​​the corresponding fan-shaped mesh 321, and will not affect the self-cleaning function of the subsequent conical filter 320.

[0083] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sponge city rainwater purification structure, comprising an upper water intake hopper (100), a main body (200), and a primary filtration device (300); the main body (200) comprises a shell (210), a filter cylinder (230), a filter element assembly (250), an inner water intake hopper (260), and a drive motor (270); the filter cylinder (230) is generally cylindrical and is fixed inside the shell (210); a circular liquid inlet is provided at the center of the top of the shell (210); Its features are, The inner water inlet (260) has a bucket-shaped structure that is larger at the top and smaller at the bottom. The lower opening of the inner water inlet (260) is rotatably fitted onto the outer top wall of the filter element assembly (250), and the upper opening of the inner water inlet (260) is fixed to the inner top wall of the filter cylinder (230). The upper water inlet (100) has a bucket-shaped structure that is larger at the top and smaller at the bottom, and the upper water inlet (100) is fixed above the outer shell (210) by multiple brackets (110). The drive motor (270) is used to drive the filter element assembly (250) to rotate. The primary filtration device (300) includes a connecting rod (310) and a conical filter screen (320); the connecting rod (310) is a vertically arranged straight rod, and the bottom end of the connecting rod (310) is fixed to the center of the top of the filter element assembly (250); the conical filter screen (320) is a hollow cone with an open bottom; the end of the connecting rod (310) away from the filter element assembly (250) is connected to the center of the bottom surface of the conical filter screen (320); the conical filter screen (320) is located between the upper water inlet (100) and the outer shell (210), and in the initial state, the diameter of the bottom opening of the conical filter screen (320) is larger than the diameter of the liquid inlet, and the bottom surface of the conical filter screen (320) abuts against the outer wall of the top of the outer shell (210); The conical filter screen (320) is composed of multiple fan-shaped screens (321), with 4 to 8 fan-shaped screens (321). The top of the fan-shaped screen (321) is hinged to the top of the connecting rod (310). In the initial state, the bottom of the fan-shaped screen (321) abuts against the top outer wall of the outer shell (210). The fan-shaped screen (321) can rotate up and down relative to the connecting rod (310). A connecting net (322) is detachably fixed between two adjacent fan-shaped screens (321).

2. The sponge city rainwater purification structure as described in claim 1, characterized in that, The outer shell (210) is a hollow cylinder with its central axis vertically aligned. The main body (200) also includes legs (220) and brush assemblies (240). Multiple legs (220) are fixed to the bottom surface of the outer shell (210) to support it. The two ends of the filter cylinder (230) are fixed to the inner walls of the top and bottom of the outer shell (210), respectively. The side walls of the filter cylinder (230) are densely covered with through holes. There are two brush assemblies (240), and the two brush assemblies (240) are symmetrically fixed between the filter cylinder (230) and the filter element assembly (250). Within the space, the brush in the brush assembly (240) abuts against the outer wall of the filter element assembly (250); the filter element assembly (250) is located inside the filter cylinder (230), and the bottom end of the filter element assembly (250) is rotatably connected to the inner wall of the bottom end of the outer shell (210); the upper opening of the upper water inlet (100) is used to collect rainwater, and the lower opening of the upper water inlet (100) corresponds to the liquid inlet on the outer shell (210); the drive motor (270) is fixed at the bottom center of the outer shell (210), and the rotating shaft of the drive motor (270) passes through the outer shell (210) and is fixedly connected to the bottom center of the filter element assembly (250).

3. The sponge city rainwater purification structure as described in claim 1, characterized in that, The top of the connecting rod (310) is not lower than the bottom of the upper water inlet (100); the central axes of the outer shell (210), the filter cylinder (230) and the filter element assembly (250) are on the same straight line; the bottom opening diameter of the upper water inlet (100) is not greater than the diameter of the liquid inlet; the radius of the liquid inlet is smaller than the inner radius of the filter cylinder (230) and larger than the outer radius of the filter element assembly (250).

4. The sponge city rainwater purification structure as described in claim 1, characterized in that, The connecting mesh (322) is made of elastic rubber to prevent foreign objects from entering the housing (210) through the gap between the two fan-shaped meshes (321).

5. The sponge city rainwater purification structure as described in claim 4, characterized in that, Each of the fan-shaped nets (321) has a traction rope (323) fixed at the middle position near the upper water inlet (100), and a counterweight (324) fixed at the other end of the traction rope (323); the length of the traction rope (323) is one-half to one-third of the radius of the fan-shaped net (321); the material of the traction rope (323) is stainless steel rope; the mass of the counterweights (324) on the multiple fan-shaped nets (321) gradually decreases along the rotation direction of the connecting rod (310), and the mass of the smallest counterweight (324) is one-half to one-third of the mass of the largest counterweight (324).

6. The sponge city rainwater purification structure as described in claim 5, characterized in that, The counterweight (324) is ellipsoidal in shape, and the long axis of the counterweight (324) is aligned with the length of the traction rope (323); the counterweight (324) is made of permanent magnet, and the magnetic poles of the counterweight (324) are located at both ends of the long axis.

7. The sponge city rainwater purification structure as described in claim 6, characterized in that, The traction rope (323) is provided with multiple sliding magnetic columns (325). The sliding magnetic column (325) is cylindrical in shape, and the traction rope (323) slides through the sliding magnetic column (325) along the central axis of the sliding magnetic column (325). When the traction rope (323) is taut, two adjacent sliding magnetic columns (325) on the same traction rope (323) repel each other, and the counterweight (324) repels the adjacent sliding magnetic column (325). The fan-shaped mesh (321) is made of martensitic stainless steel, so that the fan-shaped mesh (321) can be magnetically attracted by the counterweight (324) and the sliding magnetic column (325). The mass of the sliding magnetic column (325) is not greater than half the mass of the smallest counterweight (324).

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