A municipal drainage system

Abstract

This invention relates to the field of municipal drainage technology, and in particular to a municipal drainage system, comprising a pipe assembly. A connecting component is fixedly connected to the lower right side of the pipe assembly. A rotating component is tightly fitted to the right end of the connecting component. A filter assembly is fixedly connected to the right end of the rotating component. A pushing component is embedded inside the filter assembly. The pipe assembly includes a fixed shell, and a fixing frame is fixedly connected to the upper outer ring of the fixed shell. Through the rotating component, filter assembly, and pipe assembly, the problem of impurity blockage is effectively solved, drainage efficiency is improved, and maintenance costs are reduced. In traditional systems, impurities easily cause pipe blockage. However, the isolation plate and barrier groove of the pipe assembly in this device can initially intercept larger impurities, the filter shell of the filter assembly can deeply filter fine impurities, and the pushing component can easily clean the filtered impurities, reducing pipe blockage and lowering the difficulty and cost of cleaning and maintenance.

Description

Technical Field

[0001] This invention relates to the field of municipal drainage technology, and more particularly to a municipal drainage system. Background Technology

[0002] Against the backdrop of accelerating urbanization, municipal drainage systems, as a crucial component of urban infrastructure, directly impact the normal operation of cities and the quality of life for residents. However, traditional municipal drainage systems have gradually revealed numerous problems in actual operation: On the one hand, rainwater or sewage often contains a large amount of impurities such as tree branches, plastic bottles, and sand. If these impurities directly enter the drainage pipes, they can easily cause blockages, affecting drainage efficiency and increasing the difficulty and cost of subsequent cleaning and maintenance. On the other hand, the direction of traditional drainage pipes is mostly fixed, making it difficult to flexibly adjust according to actual drainage needs. This results in poor adaptability when dealing with complex drainage scenarios (such as temporary changes in drainage direction during flood season or adjustments to drainage paths in localized areas).

[0003] In addition, the filter components of some drainage systems have simple structures, poor filtration effects, and are inconvenient to clean impurities. After long-term use, their filtration capacity is prone to decline. In order to solve the above problems, improve the impurity interception capacity, directional adjustment flexibility, filtration effect, and stability of the connection of each component of the municipal drainage system, and meet the needs of modern cities for efficient and reliable drainage systems, this municipal drainage system with optimized structure and complete functions has been developed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a municipal drainage system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: it includes a pipe assembly, a connecting component is fixedly connected to the lower right side of the pipe assembly, a rotating component is tightly fitted to the right end of the connecting component, a filter assembly is fixedly connected to the right end of the rotating component, and a pushing component is embedded inside the filter assembly.

[0006] Preferably, the pipe assembly includes a fixed shell, a fixed bracket is fixedly connected to the upper outer ring of the fixed shell, an isolation plate is embedded in the inner side of the fixed bracket, a plurality of barrier grooves are opened at the upper end of the isolation plate, an inner cavity is opened at the upper end of the fixed shell, and a conveying pipe is fixedly connected to the lower right side of the fixed shell.

[0007] Preferably, the connecting assembly includes a connecting pipe, a fixing plate is fixedly connected to the lower end of the connecting pipe, an inner hole is opened at the outer right end of the connecting pipe, a connecting frame is fixedly connected to the outer right end of the connecting pipe, connecting rods are fixedly connected to both the front and rear ends of the upper end of the connecting frame, a support frame is fixedly connected at the middle position of the front and rear ends of the connecting frame, a fixing hole is opened at the middle right side of the front and rear ends of the connecting frame, and a sealing frame is provided on the inner side of the connecting frame.

[0008] Preferably, the rotating assembly includes a rotating frame, with an installation ring embedded in the upper left side of the rotating frame, and fixing rings at both the front and rear ends of the rotating frame. A telescopic rod is fixedly connected to the right end of the fixing ring, and a connecting ring is fixedly connected to the right end of the telescopic rod. A fixing shaft is provided inside the connecting ring. A cover plate is fixedly connected to the right end of the rotating frame by a fixing bolt, and a fixing pipe is fixedly connected to the right end of the cover plate. A flexible tube is tightly sleeved on the outside of the fixing pipe.

[0009] Preferably, the filter assembly includes a filter housing, a reinforcing tube is fixedly connected to the left end of the filter housing, a reinforcing frame is fixedly connected to the upper end of the filter housing, and an embedding groove is provided in the middle of the upper end of the reinforcing frame.

[0010] Preferably, the pushing component includes a rotating tube, the upper end of which has an embedding hole, and the left and right ends of the rotating tube are fixedly connected to a pushing plate.

[0011] Preferably, the barrier groove is rectangular and symmetrically arranged at both ends, and the gaps between multiple barrier grooves are the same. There are two isolation plates in total, and the lower right side of the fixed shell is fixedly connected to the connecting pipe of the connecting assembly.

[0012] Preferably, the connecting rod is L-shaped, with a mounting hole on the right side of the front end of the connecting rod. The right end of the connecting rod is slidably connected to the mounting ring of the rotating frame in the rotating assembly. Both the front and rear ends of the sealing frame are fixedly connected to the fixing holes of the connecting frame through fixing bolts.

[0013] Preferably, the fixed shaft passes through the connecting ring, and the fixed shaft is fixedly connected to the outer middle part of the connecting frame, while the fixed shaft and the connecting ring are rotatably connected.

[0014] Preferably, the push plate is made of silicone plate, and the lower end of the push plate is slidably connected to the inner side of the filter shell in the filter assembly.

[0015] The present invention has the following beneficial effects:

[0016] Compared with existing technologies, this municipal drainage system effectively solves the problem of impurity blockage by setting up rotating components, filtering components, and pipe components, improving drainage efficiency and reducing maintenance costs. In traditional systems, impurities easily cause pipe blockage, while the isolation plates and barrier grooves of the pipe components of this equipment can initially intercept larger impurities, the filter shell of the filtering components can deeply filter fine impurities, and the driving components can easily clean the filtered impurities, reducing pipe blockage and lowering the difficulty and cost of cleaning and maintenance.

[0017] Compared with existing technologies, this municipal drainage system enhances the flexibility of drainage direction adjustment and improves system adaptability through the setting of rotating components and connecting components. Traditional drainage pipes have a fixed direction and are difficult to cope with complex scenarios. The rotating frame of this equipment can rotate around a fixed axis. With the sliding of the mounting ring on the connecting rod and the extension and retraction of the telescopic rod, the drainage direction can be flexibly adjusted. It can adapt well to complex drainage scenarios such as changes in drainage direction during the flood season and adjustments to drainage paths in local areas. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall structure of the explosion point of the connecting component of the present invention.

[0020] Figure 3 For the present invention Figure 2 A schematic diagram of the structure at point A;

[0021] Figure 4 For the present invention Figure 2 A schematic diagram of the structure at point B;

[0022] Figure 5 For the present invention Figure 2 A schematic diagram of the structure at point C;

[0023] Legend:

[0024] 1. Pipe assembly; 101. Fixed housing; 102. Fixed bracket; 103. Isolation plate; 104. Barrier groove; 105. Inner cavity; 106. Delivery pipe;

[0025] 2. Connecting components; 201. Connecting pipe; 202. Fixing plate; 203. Inner hole; 204. Connecting bracket; 205. Connecting rod; 206. Mounting hole; 207. Support bracket; 208. Fixing hole; 209. Sealing bracket;

[0026] 3. Rotating assembly; 301. Rotating frame; 302. Mounting ring; 303. Fixing ring; 304. Telescopic rod; 305. Connecting ring; 306. Fixing shaft; 307. Cover plate; 308. Fixing pipe; 309. Flexible hose;

[0027] 4. Filter assembly; 401. Filter housing; 402. Reinforcing tube; 403. Sealing frame; 404. Embedded groove;

[0028] 5. Pushing component; 501. Rotating tube; 502. Embedded hole; 503. Pushing plate. Detailed Implementation

[0029] Reference Figure 1-5 The present invention provides a municipal drainage system comprising a pipe assembly 1, a connecting assembly 2 fixedly connected to the lower right side of the pipe assembly 1, a rotating assembly 3 tightly fitted to the right end of the connecting assembly 2, a filter assembly 4 fixedly connected to the right end of the rotating assembly 3, and a pushing assembly 5 embedded inside the filter assembly 4.

[0030] As a further implementation of the above technical solution, the overall composition of the municipal drainage system and the connection relationship of each major component (pipe component 1, connection component 2, rotating component 3, filter component 4, and driving component 5) are clarified, laying the foundation for the structural construction of the entire system and making the position and connection method of each component clear at a glance.

[0031] Preferably, the pipe assembly 1 includes a fixed shell 101, a fixed bracket 102 is fixedly connected to the upper outer ring of the fixed shell 101, an isolation plate 103 is embedded in the inner side of the fixed bracket 102, a plurality of barrier grooves 104 are opened at the upper end of the isolation plate 103, an inner cavity 105 is opened at the upper end of the fixed shell 101, and a conveying pipe 106 is fixedly connected to the lower right side of the fixed shell 101.

[0032] As a further implementation of the above technical solution: the isolation plate 103 and the barrier groove 104 thereon can initially block larger impurities in the drainage, preventing impurities from directly entering the subsequent components and causing blockage; the inner cavity 105 provides a flow space for drainage, and the conveying pipe 106 realizes the connection with the connecting component 2, ensuring smooth drainage. After rainwater or sewage enters the inner cavity 105 of the fixed shell 101, during the flow process, larger impurities will be blocked by the barrier groove 104 on the isolation plate 103, and the water will flow downward through the barrier groove 104 and the inner cavity 105, and finally be conveyed to the connecting component 2 through the conveying pipe 106.

[0033] Preferably, the connecting assembly 2 includes a connecting pipe 201, a fixing plate 202 is fixedly connected to the lower end of the connecting pipe 201, an inner hole 203 is opened at the outer right end of the connecting pipe 201, a connecting frame 204 is fixedly connected to the outer right end of the connecting pipe 201, a connecting rod 205 is fixedly connected to both the front and rear ends of the upper end of the connecting frame 204, a support frame 207 is fixedly connected at the middle position of the front and rear ends of the connecting frame 204, a fixing hole 208 is opened at the middle right side of the front and rear ends of the connecting frame 204, and a sealing frame 209 is provided on the inner side of the connecting frame 204.

[0034] As a further implementation of the above technical solution: the fixing plate 202 can fix the connecting pipe 201 in the corresponding position, enhancing the stability of the connecting assembly 2; the connecting frame 204, connecting rod 205, support frame 207 and other structures cooperate with each other to improve the firmness of the connection between the connecting assembly 2 and the rotating assembly 3; the sealing frame 209 further strengthens the structural strength of the connecting frame 204, and the inner hole 203 may provide space for the installation or connection of related components. Water transported from the pipe assembly 1 enters the connecting pipe 201 and is transported to the right to the rotating assembly 3 through the connecting pipe 201. During this process, the various structures of the connecting assembly 2 remain relatively stationary, mainly playing the role of connecting and transporting water.

[0035] Preferably, the rotating assembly 3 includes a rotating frame 301. An installation ring 302 is embedded in the upper left side of the rotating frame 301. Fixing rings 303 are provided at both the front and rear ends of the rotating frame 301. A telescopic rod 304 is fixedly connected to the right end of the fixing ring 303. A connecting ring 305 is fixedly connected to the right end of the telescopic rod 304. A fixing shaft 306 is provided on the inner side of the connecting ring 305. A cover plate 307 is fixedly connected to the right end of the rotating frame 301 by a fixing bolt. A fixing pipe 308 is fixedly connected to the right end of the cover plate 307. A flexible hose 309 is tightly sleeved on the outer side of the fixing pipe 308.

[0036] As a further implementation scheme of the above technical solution: the structure of the rotating component 3 is introduced. The mounting ring 302 is slidably connected to the connecting rod 205 of the connecting component 2, which facilitates the rotation of the rotating frame 301. The fixing ring 303, the telescopic rod 304, the connecting ring 305 and the fixing shaft 306 cooperate with each other, so that the rotating frame 301 can rotate around the fixing shaft 306 to realize the angle adjustment, which is convenient to change the drainage direction according to the actual situation. The cover plate 307 is connected to the rotating frame 301 through the fixing bolt, which is convenient for disassembly and maintenance. The setting of the fixing pipe 308 and the hose 309 can flexibly adapt to the change of drainage direction and ensure the continuity of drainage. When it is necessary to adjust the drainage direction, the rotating frame 301 can rotate around the fixing shaft 306. At this time, the mounting ring 302 slides on the connecting rod 205, and the telescopic rod 304 extends and retracts accordingly to adapt to the angle change of the rotating frame 301. After the water enters the rotating frame 301 from the connecting component 2, it is transported to the filter component 4 through the cover plate 307, the fixing pipe 308 and the hose 309.

[0037] Preferably, the filter assembly 4 includes a filter housing 401, a reinforcing tube 402 is fixedly connected to the left end of the filter housing 401, a reinforcing frame 403 is fixedly connected to the upper end of the filter housing 401, and an embedding groove 404 is provided in the middle of the upper end of the reinforcing frame 403.

[0038] As a further implementation of the above technical solution: the reinforcing tube 402 enhances the firmness of the connection between the filter shell 401 and the rotating component 3; the sealing frame 209 improves the structural strength of the filter shell 401, and the filter shell 401 provides space for water filtration. Water enters the filter shell 401 from the rotating component 3 and is filtered inside the filter shell 401. During this process, the various structures of the filter component 4 remain relatively stationary, mainly playing the role of containing and filtering water.

[0039] Preferably, the pushing component 5 includes a rotating tube 501, the upper end of which is provided with an embedding hole 502, and the left and right ends of the rotating tube 501 are fixedly connected with pushing plates 503.

[0040] As a further implementation of the above technical solution: the rotating tube 501 can drive the push plate 503 to rotate. The push plate 503 is made of silicone plate, which is soft and has a certain elasticity. During the pushing process, it can effectively push impurities without easily damaging the inner side of the filter shell 401. The embedded hole 502 may provide an operating point for the rotation of the push assembly 5 or connect with other components. When impurities accumulate in the filter assembly 4, the impurities flow inside while water can be discharged through the lower end of the filter shell 401. The lower end of the filter shell 401 is set to a high-density filter screen state.

[0041] Preferably, the barrier groove 104 is rectangular and symmetrically arranged at both ends, and the gaps between the multiple barrier grooves 104 are the same. There are two isolation plates 103 in total, and the lower right side of the fixed shell 101 is fixedly connected to the connecting pipe 201 of the connecting assembly 2.

[0042] As a further implementation scheme of the above technical solution: the shape and distribution of the barrier grooves 104 and the number of isolation plates 103 are further clarified. The rectangular barrier grooves 104 with symmetrical arrangement at both ends can more effectively block impurities. Multiple barrier grooves 104 with the same gap ensure the uniformity of drainage. The two isolation plates 103 can enhance the effect of initial impurity blocking and improve the protection of subsequent components. At the same time, the fixing relationship between the fixed shell 101 and the connecting pipe 201 of the connecting component 2 is clarified. The symmetrical barrier grooves 104 on the two isolation plates 103 jointly perform initial filtration of impurities in the water. After the water passes through the barrier grooves 104, it enters the connecting pipe 201 through the connection part between the lower right side of the fixed shell 101 and the connecting pipe 201.

[0043] Preferably, the connecting rod 205 is L-shaped, and a mounting hole 206 is provided on the right side of the front end of the connecting rod 205. The right end of the connecting rod 205 is slidably connected to the mounting ring 302 of the rotating frame 301 in the rotating assembly 3. Both the front and rear ends of the sealing frame 209 are fixedly connected to the fixing holes 208 provided in the connecting frame 204 by fixing bolts.

[0044] As a further implementation of the above technical solution: the shape of the connecting rod 205, the setting of the mounting hole 206, and the connection relationship between the connecting rod 205 and the mounting ring 302, and between the sealing frame 209 and the connecting frame 204 are refined. The L-shaped connecting rod 205 facilitates connection and sliding with the mounting ring 302; the mounting hole 206 provides a position for the installation of related fixed components; the sealing frame 209 and the connecting frame 204 are fixedly connected by fixing bolts, which further enhances the stability of the connecting frame 204 and ensures the reliability of the connection between the connecting assembly 2 and the rotating assembly 3. When the rotating assembly 3 rotates, the connecting rod 205 and the mounting ring 302 slide relative to each other, while other structures remain fixed, ensuring the stable connection between the connecting assembly 2 and the rotating assembly 3 and not affecting the water delivery.

[0045] Preferably, the fixed shaft 306 passes through the connecting ring 305, and the fixed shaft 306 is fixedly connected to the outer middle part of the connecting frame 204, and the fixed shaft 306 is rotatably connected to the connecting ring 305.

[0046] As a further implementation of the above technical solution: the fixed shaft 306 passes through the connecting ring 305 and is fixedly connected to the connecting frame 204, while also being rotatably connected to the connecting ring 305. This structural design ensures that the rotating frame 301 can rotate stably around the fixed shaft 306, providing reliable support and rotation center for the angle adjustment of the rotating component 3. When the rotating frame 301 rotates, the connecting ring 305 rotates around the fixed shaft 306, while the fixed shaft 306 remains fixed on the connecting frame 204, thus achieving stable rotation of the rotating frame 301 and ensuring smooth drainage direction adjustment.

[0047] Preferably, the push plate 503 is made of silicone plate, and the lower end of the push plate 503 is slidably connected to the inner side of the filter shell 401 in the filter assembly 4.

[0048] As a further implementation of the above technical solution: the push plate 503 made of silicone plate has good flexibility and wear resistance, can closely fit the inner side of filter shell 401, effectively push impurities, and avoid scratching filter shell 401; the sliding connection between push plate 503 and the inner side of filter shell 401 ensures the smooth operation of push component 5 and facilitates cleaning of filtered impurities. In the same motion process as push component 5 in claim 6, push plate 503 slides on the inner side of filter shell 401 under the drive of rotating tube 501 to clean impurities.

[0049] Working principle:

[0050] When using this invention, the inner embedded isolation plate 103 and the multiple rectangular blocking grooves 104 at the upper end of the isolation plate 103 effectively intercept larger impurities such as tree branches and plastic bottles in the water, preventing these impurities from directly entering the subsequent pipes and causing blockages. The water that has undergone preliminary filtration smoothly passes through the blocking grooves 104, flows downward along the inner cavity 105, and finally flows smoothly into the connecting pipe 201 of the connecting assembly 2 through the conveying pipe 106 on the lower right side of the fixed shell 101. The water flow entering the connecting pipe 201 continues to be conveyed to the right. The fixing plate 202 at the lower end of the connecting pipe 201 firmly fixes it to the ground or wall and other basic structures, ensuring the stability of the water conveyance process. The connecting frame 204 on the outer right side of the connecting pipe 201 cooperates with the connecting rods 205 at the front and rear ends and the support frame 207 on the middle side. This forms a stable support structure, providing reliable support for the connection with the rotating component 3. The sealing frame 209 inside the connecting frame 204 further enhances the load-bearing capacity of the connecting frame 204, ensuring that the connection will not loosen during water flow. The water then enters the rotating component 3. When it is necessary to adjust the direction according to the drainage scenario, the rotating frame 301 can rotate flexibly around the fixed shaft 306 that passes through the connecting ring 305. At this time, the mounting ring 302 on the upper left side of the rotating frame 301 will slide smoothly on the connecting rod 205, while the fixed ring 303 on the right side... The telescopic rod 304 at the end extends and retracts synchronously with the rotation angle, cleverly adapting to the positional changes of the rotating frame 301 and avoiding structural jamming. After the water flows through the rotating frame 301, it enters the fixed pipe 308 through the cover plate 307 connected to the rotating frame 301 by the fixing bolt, and then through the flexible hose 309 tightly sleeved on the outside of the fixed pipe 308, flexibly conveying it into the filter shell 401 of the filter assembly 4 for deep filtration. The left end of the filter shell 401 is firmly connected to the flexible hose 309 through the reinforcing pipe 402, while the upper reinforcing frame 403 enhances its structural strength and can withstand... Due to the pressure from the impact of water flow and the accumulation of impurities, as the water flows slowly inside the filter housing 401, fine sand particles, silt, and other impurities in the water are intercepted inside the housing. The impact force of the water flow can drive the silicone push plates 503 fixed at both ends of the outer side to slide gently and tightly inside the filter housing 401 (the silicone material can ensure the pushing effect without scratching the inner wall of the filter housing 401), thus concentrating the deposited impurities and pushing them to a specific cleaning port position inside the housing for quick removal later, thereby efficiently completing the entire drainage and impurity treatment cycle.

[0051] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A municipal drainage system, comprising a pipe assembly (1), characterized in that: A connecting component (2) is fixedly connected to the lower right side of the pipe assembly (1). A rotating component (3) is tightly fitted to the right end of the connecting component (2). A filter component (4) is fixedly connected to the right end of the rotating component (3). A pushing component (5) is embedded inside the filter component (4). The pipeline assembly (1) includes a fixed shell (101), a fixed frame (102) is fixedly connected to the upper outer ring of the fixed shell (101), an isolation plate (103) is embedded in the inner side of the fixed frame (102), a plurality of barrier grooves (104) are opened at the upper end of the isolation plate (103), an inner cavity (105) is opened at the upper end of the fixed shell (101), and a delivery pipe (106) is fixedly connected to the lower right side of the fixed shell (101). The connecting assembly (2) includes a connecting pipe (201), a fixing plate (202) is fixedly connected to the lower end of the connecting pipe (201), an inner hole (203) is opened at the outer right end of the connecting pipe (201), a connecting frame (204) is fixedly connected to the outer right end of the connecting pipe (201), a connecting rod (205) is fixedly connected to both the front and rear ends of the upper end of the connecting frame (204), a support frame (207) is fixedly connected to the middle position of the front and rear ends of the connecting frame (204), a fixing hole (208) is opened in the middle of the right side of the front and rear ends of the connecting frame (204), and a sealing frame (209) is provided on the inner side of the connecting frame (204); The rotating assembly (3) includes a rotating frame (301). An installation ring (302) is embedded in the upper left side of the rotating frame (301). Fixed rings (303) are provided at both the front and rear ends of the rotating frame (301). A telescopic rod (304) is fixedly connected to the right end of the fixed ring (303). A connecting ring (305) is fixedly connected to the right end of the telescopic rod (304). A fixed shaft (306) is provided on the inner side of the connecting ring (305). A cover plate (307) is fixedly connected to the right end of the rotating frame (301) by a fixing bolt. A fixing pipe (308) is fixedly connected to the right end of the cover plate (307). A flexible hose (309) is tightly sleeved on the outer side of the fixing pipe (308).

2. A municipal drainage system according to claim 1, characterized in that: The filter assembly (4) includes a filter housing (401), a reinforcing tube (402) is fixedly connected to the left end of the filter housing (401), a reinforcing frame (403) is fixedly connected to the upper end of the filter housing (401), and an embedding groove (404) is provided in the middle of the upper end of the reinforcing frame (403).

3. A municipal drainage system according to claim 1, characterized in that: The pushing component (5) includes a rotating tube (501), the upper end of which is provided with an embedding hole (502), and the left and right ends of the rotating tube (501) are fixedly connected with pushing plates (503).

4. A municipal drainage system according to claim 3, characterized in that: The barrier groove (104) is rectangular and symmetrically arranged at both ends. The gaps between the multiple barrier grooves (104) are the same. There are two isolation plates (103). The lower right side of the fixed shell (101) is fixedly connected to the connecting pipe (201) of the connecting assembly (2).

5. A municipal drainage system according to claim 4, characterized in that: The connecting rod (205) is L-shaped. The front end of the connecting rod (205) has a mounting hole (206) on the right side. The right end of the connecting rod (205) is slidably connected to the mounting ring (302) of the rotating frame (301) in the rotating assembly (3). The front and rear ends of the sealing frame (209) are fixedly connected to the fixing holes (208) of the connecting frame (204) by fixing bolts.

6. A municipal drainage system according to claim 5, characterized in that: The fixed shaft (306) passes through the connecting ring (305), and the fixed shaft (306) is fixedly connected to the outer middle part of the connecting frame (204), and the fixed shaft (306) is rotatably connected to the connecting ring (305).

7. A municipal drainage system according to claim 6, characterized in that: The push plate (503) is made of silicone plate, and the lower end of the push plate (503) is slidably connected to the inner side of the filter shell (401) in the filter assembly (4).

Images