Municipal drainage pipeline with quickly replaceable blocking net

Abstract

The utility model relates to the technical field of municipal drainage pipeline blocking nets, and discloses a municipal drainage pipeline with a rapidly replaceable blocking net, which comprises a drainage channel body, a net rack is arranged on the inner wall of the drainage channel body, the rear end of the inner wall of the net rack is fixedly connected with an intercepting net, and the front end of the inner wall of the intercepting net is fixedly connected with a fixed shell. Screw rods are rotatably connected to the inner walls of the left end and the right end of the net rack, an expansion air bag is connected to the front end of the fixing shell through a dismounting set, a connecting frame is fixedly connected to the rear end of the drainage channel body, an electric hydraulic cylinder is fixedly connected to the inner wall of the left end of the connecting frame, and a cleaning wheel is connected to the driving end of the electric hydraulic cylinder through a cleaning set. According to the utility model, the operation and maintenance efficiency of municipal drainage facilities is remarkably improved, the device is particularly suitable for quick maintenance operation of urban underground pipe network space limited areas, impurities accumulated on the surface of the interception net are scraped, blockage is effectively prevented, and the design remarkably improves the filtering efficiency, reduces the maintenance frequency and ensures stable operation of a drainage system.

Description

Technical Field

[0001] This utility model relates to the field of municipal drainage pipe mesh technology, and in particular to a municipal drainage pipe with a mesh that can be quickly replaced. Background Technology

[0002] Municipal drainage pipelines are a crucial component of urban infrastructure, and their construction and maintenance directly impact the operational efficiency of urban drainage systems and the quality of life for residents. With rapid urbanization, population growth, and urban expansion, the demand for drainage systems has increased significantly. The construction and maintenance of drainage pipelines have become critical links in ensuring the normal operation of cities. The main functions of drainage pipelines include: the design and construction of drainage systems, the treatment and discharge of wastewater, maintaining the balance of the urban ecosystem, and effectively controlling flooding during heavy rainfall. A good drainage system can reduce the risk of urban flooding, enhance the city's disaster prevention capabilities, and create a safe and comfortable living environment for residents.

[0003] Municipal drainage pipes are a crucial component of urban infrastructure, and their safe operation directly impacts the overall efficiency of the urban drainage system. However, replacing existing fencing installed in drainage pipes often faces numerous challenges: the specialized structure and advanced construction techniques of drainage pipes make replacement time-consuming, labor-intensive, and costly; simultaneously, frequent replacement of fencing increases the maintenance burden on the drainage system, affecting its operational efficiency. This inconvenience not only increases maintenance costs but may also lead to functional problems within the drainage system, potentially causing environmental issues such as flooding or sewage overflows.

[0004] In response to this technical problem, this application proposes a municipal drainage pipe with a quickly replaceable mesh screen. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a municipal drainage pipe with a quickly replaceable screen, which significantly improves the operation and maintenance efficiency of municipal drainage facilities. It is particularly suitable for rapid maintenance operations in areas with limited space in urban underground pipe networks, and it removes impurities accumulated on the surface of the screen, effectively preventing blockages. This design significantly improves filtration efficiency, reduces maintenance frequency, and ensures stable operation of the drainage system.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A municipal drainage pipe with a quickly replaceable barrier net includes a drainage pipe body. A mesh frame is installed on the inner wall of the drainage pipe body. An intercepting net is fixedly connected to the rear end of the inner wall of the mesh frame. A fixing shell is fixedly connected to the front end of the inner wall of the intercepting net. Screws are rotatably connected to the inner walls of both the left and right ends of the mesh frame. An inflatable airbag is connected to the front end of the fixing shell via a disassembly assembly. A connecting frame is fixedly connected to the rear end of the drainage pipe body. An electric hydraulic cylinder is fixedly connected to the inner wall of the left end of the connecting frame. A cleaning wheel is connected to the drive end of the electric hydraulic cylinder via a cleaning assembly.

[0008] Furthermore, the disassembly assembly includes a movable block threadedly connected to the outer wall of the screw, with a support rod rotatably connected to one end of each movable block, and an outer pressure plate rotatably connected to one end of each support rod.

[0009] Furthermore, the inner walls of the left and right ends of the grid frame are rotatably connected to the upper and lower sides, and the opposite ends of the two support rods are rotatably connected to the opposite end of the outer pressure plate.

[0010] Furthermore, a connecting shell is fixedly connected to the front end of the fixed shell, a compression plate is slidably connected to the front end of the connecting shell, and an inflatable balloon is installed on the inner wall of the connecting shell.

[0011] Furthermore, a three-way pipe is fixedly connected to the front end of the inflatable balloon, and a delivery pipe is fixedly connected to the outer walls of both the upper and lower ends of the three-way pipe. An inflatable air bladder is fixedly connected to the opposite end of the delivery pipe, and an exhaust plug is provided on the outer wall of the inflatable air bladder.

[0012] Furthermore, a fixing ring is fixedly connected to the inner wall of the three-way pipe, and a return spring is fixedly connected to both the left and right sides of the rear end of the fixing ring. A closing plate is fixedly connected to the other end of the return spring, and the closing plate is rotatably connected to the left and right ends of the inner wall of the fixing ring at one end.

[0013] Furthermore, the cleaning assembly includes a connecting frame fixedly connected to the drive end of the electric hydraulic cylinder, the outer wall of the connecting frame being slidably connected to the inner wall of the connecting frame.

[0014] Furthermore, a transmission gear is fixedly connected to the left end of the cleaning wheel, and a rack is fixedly connected to the left end of the inner wall of the connecting frame. The transmission gear and the rack are meshed together.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, when the mesh frame needs to be replaced during the operation of the drainage channel body, the screw is rotated to drive the moving block to move. The outer pressure plate is contracted through support rod one and support rod two, which releases the squeezing pressure on the drainage channel body and facilitates the removal of the mesh frame. After the new mesh frame is installed, the screw is rotated in the opposite direction to press the squeezing plate so that the inflatable balloon is inflated into the expansion airbag through the three-way pipe. The expansion airbag blocks the gap between the drainage channel body and the mesh frame to ensure a sealing effect.

[0017] 2. In this utility model, during the filtration process of the interception net, when there are too many impurities, the electric hydraulic cylinder is activated to drive the connecting frame to rise and fall, so that the cleaning wheel rotates under the transmission of the transmission gear and rack, scraping off the impurities accumulated on the surface of the interception net, effectively preventing blockage. This design significantly improves filtration efficiency, reduces maintenance frequency, and ensures stable operation of the drainage system. Attached Figure Description

[0018] Figure 1 This is a perspective view of a municipal drainage pipe with a quickly replaceable mesh, as proposed in this utility model.

[0019] Figure 2 This is a half-sectional view of the drainage channel body of a municipal drainage pipe with a quick-replaceable barrier net, as proposed in this utility model.

[0020] Figure 3 This is a half-sectional view of the fixing shell of a municipal drainage pipe with a quick-replaceable mesh, as proposed in this utility model.

[0021] Figure 4 This is a half-sectional view of the mesh frame of a municipal drainage pipe with a quick-replaceable mesh, as proposed in this utility model.

[0022] Figure 5 This utility model provides a half-sectional view of the connecting shell of a municipal drainage pipe with a quick-replaceable mesh.

[0023] Figure 6 This is a half-sectional view of a tee pipe for a municipal drainage pipe with a quick-replaceable mesh, as proposed in this utility model.

[0024] Figure 7 This utility model provides a schematic diagram of the connecting frame structure for a municipal drainage pipe with a quickly replaceable mesh.

[0025] Figure 8 This is a half-sectional view of a connecting frame for a municipal drainage pipe with a quick-replaceable mesh, as proposed in this utility model.

[0026] Legend:

[0027] 1. Drainage channel body; 2. Grid frame; 3. Interception net; 4. Fixed shell; 5. Connecting shell; 6. Extrusion plate; 7. Connecting frame; 8. Screw; 9. Conveying pipe; 10. Inflatable airbag; 11. Inflatable balloon; 12. T-pipe; 13. Exhaust plug; 14. Fixing ring; 15. Return spring; 16. Closing plate; 17. Electric hydraulic cylinder; 18. Connecting frame; 19. Rack; 20. Cleaning wheel; 21. Transmission gear; 22. Moving block; 23. Support rod one; 24. External pressure plate; 25. Support rod two. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Reference Figures 1-3 This utility model provides an embodiment of a municipal drainage pipe with a quickly replaceable barrier net, comprising a drainage pipe body 1, a mesh frame 2 installed on the inner wall of the drainage pipe body 1, an intercepting net 3 fixedly connected to the rear end of the inner wall of the mesh frame 2, a fixing shell 4 fixedly connected to the front end of the inner wall of the intercepting net 3, screws 8 rotatably connected to the inner walls of both the left and right ends of the mesh frame 2, an inflatable airbag 10 connected to the front end of the fixing shell 4 via a disassembly assembly, the disassembly assembly including a movable block 22 threadedly connected to the outer wall of the screw 8, a support rod 23 rotatably connected to the opposite end of the movable block 22, an outer pressure plate 24 rotatably connected to the opposite end of the support rod 23, a support rod 25 rotatably connected to the upper and lower sides of the inner walls of both the left and right ends of the mesh frame 2, an outer pressure plate 24 rotatably connected to the opposite end of the outer pressure plate 24, a connecting shell 5 fixedly connected to the front end of the fixing shell 4, and a pressing plate 6 slidably connected to the front end of the connecting shell 5. (See reference...) Figures 4-6 An inflatable balloon 11 is installed on the inner wall of the connecting shell 5. A three-way pipe 12 is fixedly connected to the front end of the inflatable balloon 11. A delivery pipe 9 is fixedly connected to the outer walls of both the upper and lower ends of the three-way pipe 12. An inflatable airbag 10 is fixedly connected to one end of the delivery pipe 9. An exhaust plug 13 is provided on the outer wall of the inflatable airbag 10. A fixing ring 14 is fixedly connected to the inner wall of the three-way pipe 12. A return spring 15 is fixedly connected to both the left and right sides of the rear end of the fixing ring 14. A closing plate 16 is fixedly connected to the other end of the return spring 15. The closing plate 16 is rotatably connected to the left and right ends of the inner wall of the fixing ring 14.

[0030] Specifically: This municipal drainage system is constructed based on the drainage channel body 1, which is internally equipped with a detachable filter screen frame 2. The front end of the screen frame 2 is equipped with an interception net 3 to trap solid impurities. When the interception net 3 needs to be replaced due to long-term use, the operator can quickly disassemble and assemble it through the following steps: First, rotate the adjusting screw 8 located at the top of the screen frame 2 clockwise to drive the internally threaded moving block 22 to move horizontally along the guide rail. The displacement of the moving block 22 is linked to the four-bar linkage composed of support rod 1 23 and support rod 25, causing the symmetrically distributed outer pressure plates 24 to retract synchronously towards the central axis of the screen frame 2, releasing the wedge-shaped locking force between the outer pressure plates 24 and the inner wall of the drainage channel body 1. At this time, the constraint between the screen frame 2 and the drainage channel body 1 is released, and it can be pulled out axially for maintenance.

[0031] During disassembly, the exhaust plug 13 on the side of the expansion airbag 10 should be pressed simultaneously to release the compressed gas inside the airbag, ensuring that there is sufficient operating clearance between the mesh frame 2 and the drainage channel body 1. After replacing the new mesh frame 2, it should be accurately pushed into the installation groove of the drainage channel body 1. The adjusting screw 8 should be rotated counterclockwise to reset the moving block 22. The outer pressure plate 24 will expand again under the action of the linkage mechanism, thus initially achieving the mechanical fixation of the mesh frame 2.

[0032] To enhance sealing performance, the extrusion plate 6 located at the top of the drainage channel body 1 is pressed to drive the built-in inflatable balloon 11 to inject compressed air into the three-way pipe 12. The gas is diverted through the three-way pipe 12 to the annular delivery pipe 9 and finally injected into the silicone expansion airbag 10 wrapped around the outer edge of the mesh frame 2. After the airbag expands radially under the action of air pressure, it can completely fill the assembly gap between the mesh frame 2 and the drainage channel body 1, forming a dynamic sealing interface. After the inflation stops, the reset spring 15 set at the inlet of the three-way pipe 12 pushes the conical closing plate 16 to rebound, tightly fitting the fixing ring 14 to form a one-way valve structure. With the help of the residual air pressure in the delivery pipe 9, a double lock is achieved, ensuring that the expansion airbag 10 maintains a constant expansion state under the condition of no continuous air source.

[0033] This innovative structure boasts three major technological advantages: First, the synchronous retraction and expansion of the outer pressure plate 24 is achieved through a screw-linkage mechanism, eliminating the need for special tools and reducing the time required for the assembly and disassembly of the grid frame 2 by more than 60%. Second, the synergistic effect of the inflatable airbag 10 and the mechanical clamping components can maintain a sealing gap of less than 0.3mm under complex hydraulic impacts, achieving leakage prevention performance that meets the GB / T21873 standard. Third, the anti-backflow system formed by the tee pipe 12 and the closing plate 16 ensures that the airbag maintains a stable working pressure throughout the entire life cycle of the municipal drainage system, avoiding frequent air replenishment maintenance. This design significantly improves the operation and maintenance efficiency of municipal drainage facilities and is particularly suitable for rapid maintenance operations in areas with limited space in urban underground pipe networks.

[0034] Reference Figure 7 and Figure 8 A connecting frame 7 is fixedly connected to the rear end of the drainage channel body 1. An electric hydraulic cylinder 17 is fixedly connected to the inner wall of the left end of the connecting frame 7. The driving end of the electric hydraulic cylinder 17 is connected to a cleaning wheel 20 through a cleaning assembly. The cleaning assembly includes a connecting frame 18 fixedly connected to the driving end of the electric hydraulic cylinder 17. The outer wall of the connecting frame 18 is slidably connected to the inner wall of the connecting frame 7. A transmission gear 21 is fixedly connected to the left end of the cleaning wheel 20. A rack 19 is fixedly connected to the left end of the inner wall of the connecting frame 7. The transmission gear 21 and the rack 19 are meshed.

[0035] Specifically: During the operation of the drainage channel body 1, when the amount of impurities accumulated on the surface of the interceptor net 3 reaches a preset threshold, it can be determined by the built-in pressure sensor or visual monitoring system. The control system will automatically trigger the cleaning program. Specifically, the electric hydraulic cylinder 17 installed on the top of the net frame 2 is activated, and its piston rod drives the L-shaped connecting frame 18 to rise and fall along the vertical guide rail at a speed of 0.2-0.5 m / s. The side wall of the connecting frame 18 is fixed with a precision rack 19 by high-strength bolts. The rack 19 meshes with the transmission gear 21 at the shaft end of the cleaning wheel 20. The gear module is designed to be 2.5 mm to ensure smooth transmission. When the electric hydraulic cylinder 17 drives the connecting frame... During the downward movement of the 18th gear, the meshing action of the rack 19 and the transmission gear 21 converts the linear motion into rotational motion, causing the cleaning wheel 20, which is covered with wear-resistant silicone, to rotate counterclockwise at a speed of 120-150 rpm. The surface of the cleaning wheel 20 is provided with spirally arranged elastic scrapers, which maintain a dynamic gap of 2-5 mm with the interception net 3. The pressure is adaptive through the eccentric adjustment mechanism. During the rotation, the impurities such as branches and plastics attached to the net surface are peeled off and pushed to the slag collection trough at the bottom of the net frame 2. After a single downward cleaning is completed, the electric hydraulic cylinder 17 moves in the opposite direction to drive the cleaning wheel 20 to reset. At this time, the scrapers switch to clockwise rotation mode to avoid impurities being carried back.

[0036] This cleaning system features a dual-optimized design: First, the electric hydraulic cylinder 17 has a built-in overload protection module that automatically pauses and alarms when the cleaning resistance exceeds 50 N·m to prevent structural damage to the interceptor net 3. Second, the transmission gear 21 is made of stainless steel with nitriding treatment, and the rack 19 is plated with hard chrome to ensure that it can maintain more than 20,000 working cycles in a sewage environment with a pH of 4-10. Actual tests show that the device can remove more than 85% of the blockages on the surface of the interceptor net 3 within 30 seconds, saving 60% energy compared to the traditional high-pressure water gun cleaning method, and without interrupting the drainage operation. This self-cleaning module complements the aforementioned quick replacement system: daily automatic cleaning significantly extends the service life of the interceptor net 3 to 12-18 months, while when the net frame 2 needs to be replaced, the electric hydraulic cylinder 17 can switch to maintenance mode, driving the connecting frame 18 to rise to the highest position, leaving 150 mm of operating space for the disassembly of the net frame 2, achieving a seamless connection between cleaning and net replacement functions.

[0037] Working principle: When the drainage channel body 1 is draining water, and the intercepting net 3 at the mesh frame 2 needs to be replaced after filtering the water, rotating the screw 8 drives the moving block 22 to move within the mesh frame 2. When the moving block 22 moves, it causes the outer pressure plate 24 to retract inward through the support rod 1 23 and in conjunction with the support rod 25, thereby removing the squeezing force of the outer pressure plate 24 on the drainage channel body 1. This allows the mesh frame 2 to be removed from the drainage channel body 1, and the air vent plug 13 at the expansion airbag 10 is pressed to release the air. After the new mesh frame 2 is installed at the drainage channel body 1, it rotates in the opposite direction. The moving screw 8 presses the squeezing plate 6, causing the inflatable balloon 11 to inflate the three-way pipe 12, which in turn inflates the inflatable airbag 10 through the delivery pipe 9. This causes the inflatable airbag 10 to expand, blocking the gap between the drain body 1 and the mesh frame 2. After inflation stops, the elastic force generated by the return spring 15 and the activation formed by the three-way pipe 12 near the delivery pipe 9 cause the closing plate 16 to close at the fixing ring 14, keeping the inflatable airbag 10 inflated. This facilitates quick disassembly and replacement of the mesh frame 2 while ensuring a good sealing effect.

[0038] When the interceptor net 3 is filtering, if there are too many impurities at the interceptor net 3, the electric hydraulic cylinder 17 is activated to drive the connecting frame 18 to rise and fall. This allows the cleaning wheel 20 connected to the connecting frame 18 to scrape the impurities accumulated at the interceptor net 3 under the transmission of the transmission gear 21 and rack 19, thus preventing the impurities from accumulating too much and causing blockage.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A municipal drainage pipe with a quick-replaceable mesh, comprising a drainage pipe body (1), characterized in that: The drainage channel body (1) is equipped with a mesh frame (2) on its inner wall. An intercepting net (3) is fixedly connected to the rear end of the inner wall of the mesh frame (2). A fixed shell (4) is fixedly connected to the front end of the inner wall of the intercepting net (3). Screws (8) are rotatably connected to the inner walls of both the left and right ends of the mesh frame (2). An inflatable airbag (10) is connected to the front end of the fixed shell (4) through a disassembly assembly. A connecting frame (7) is fixedly connected to the rear end of the drainage channel body (1). An electric hydraulic cylinder (17) is fixedly connected to the inner wall of the left end of the connecting frame (7). A cleaning wheel (20) is connected to the drive end of the electric hydraulic cylinder (17) through a cleaning assembly.

2. The municipal drainage pipe with a quickly replaceable mesh according to claim 1, characterized in that: The disassembly assembly includes a movable block (22) threadedly connected to the outer wall of the screw (8). Each movable block (22) is rotatably connected to a support rod (23) at one end opposite to the other. Each support rod (23) is rotatably connected to an outer pressure plate (24) at one end opposite to the other.

3. A municipal drainage pipe with a quickly replaceable mesh according to claim 1, characterized in that: The inner walls of the left and right ends of the grid frame (2) are rotatably connected to the upper and lower sides of the inner walls. The opposite end of the support rod (25) is rotatably connected to the opposite end of the outer pressure plate (24).

4. A municipal drainage pipe with a quickly replaceable mesh according to claim 1, characterized in that: The front end of the fixed shell (4) is fixedly connected to the connecting shell (5), the front end of the connecting shell (5) is slidably connected to the extrusion plate (6), and an inflatable balloon (11) is installed on the inner wall of the connecting shell (5).

5. A municipal drainage pipe with a quickly replaceable mesh according to claim 4, characterized in that: The front end of the inflatable balloon (11) is fixedly connected to a three-way pipe (12), and the outer walls of both the upper and lower ends of the three-way pipe (12) are fixedly connected to a delivery pipe (9). The opposite end of the delivery pipe (9) is fixedly connected to an inflatable airbag (10), and an exhaust plug (13) is provided on the outer wall of the inflatable airbag (10).

6. A municipal drainage pipe with a quickly replaceable mesh according to claim 5, characterized in that: A fixing ring (14) is fixedly connected to the inner wall of the three-way pipe (12). A return spring (15) is fixedly connected to both the left and right sides of the rear end of the fixing ring (14). A closing plate (16) is fixedly connected to the other end of the return spring (15). The closing plate (16) is rotatably connected to the left and right ends of the inner wall of the fixing ring (14) at one end.

7. A municipal drainage pipe with a quickly replaceable mesh according to claim 1, characterized in that: The cleaning assembly includes a connecting frame (18) fixedly connected to the drive end of an electric hydraulic cylinder (17), the outer wall of which is slidably connected to the inner wall of a connecting frame (7).

8. A municipal drainage pipe with a quickly replaceable mesh according to claim 1, characterized in that: The left end of the cleaning wheel (20) is fixedly connected to a transmission gear (21), and the left end of the inner wall of the connecting frame (7) is fixedly connected to a rack (19). The transmission gear (21) and the rack (19) are meshed together.

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