Corrosion-resistant self-cleaning drainage pipe system
By using corrosion-resistant composite materials and intelligent monitoring systems, the drainage pipes have solved the problems of poor durability and difficult dredging and maintenance of traditional drainage pipes in corrosive environments. They have achieved automated dredging and real-time monitoring, improving the durability and management efficiency of the pipeline system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING UNIV OF TECH
- Filing Date
- 2026-05-07
- Publication Date
- 2026-06-12
AI Technical Summary
Traditional drainage pipes have poor durability in corrosive environments, are prone to cracking, and have high costs and risks for dredging and maintenance. They also lack real-time monitoring and early warning systems, leading to urban safety hazards.
The drainage pipes, which are made of corrosion-resistant high-density polyethylene and concrete composite structure, combined with a traction-type self-cleaning device and an intelligent monitoring system, realize automated dredging and real-time monitoring.
It significantly improves the durability and safety of pipelines, reduces manual maintenance costs and risks, and enables efficient and intelligent management of drainage systems.
Smart Images
Figure CN122190352A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the fields of municipal, environmental and pipeline engineering technology, and in particular to a corrosion-resistant self-cleaning drainage pipeline system. Background Technology
[0002] Drainage pipes are used in complex corrosive environments containing acid rain, high-salt domestic sewage, or industrial wastewater from chemical industrial parks for extended periods. Traditional reinforced concrete or metal pipes develop corrosion problems such as steel bar corrosion, concrete cracking, and thinning of the pipe wall within 3 to 8 years, resulting in a rapid decrease in the structural strength of the pipes and leakage. While single plastic pipes such as high-density polyethylene (HDPE) pipes and polyvinyl chloride (PVC) pipes are resistant to chemical corrosion, they lack the ability to withstand external pressure and are prone to cracking or circumferential buckling under soil cover and repeated traffic dynamic loads, making it difficult to balance durability and load-bearing requirements.
[0003] Another common problem facing drainage pipes is the accumulation of sludge in sewage. Reduced flow velocity leads to the deposition and compaction of solids. Sludge can reduce the flow cross-section by 20% to 60%, and anaerobic fermentation produces flammable and explosive gases such as methane and hydrogen sulfide, thus requiring continuous maintenance and cleaning. However, current manual or high-pressure water jet dredging methods require traffic interruption and multiple well openings, resulting in high labor intensity and operational risks. Furthermore, the lack of real-time monitoring of sludge thickness and flammable gas concentration easily leads to over- or under-dredging, resulting in low maintenance efficiency and high costs.
[0004] More significantly, existing technologies implement corrosion prevention, dredging, and monitoring in a fragmented manner. The corrosion prevention layer, which is simply sprayed or pasted on the inner wall, has weak interfacial adhesion and is prone to falling off under the effects of alternating wet and dry conditions and differential settlement of the foundation. Dredging relies on external equipment and cannot be coordinated with the pipeline blockage status. Liquid level or manual inspection-based monitoring lacks multi-parameter linkage of sludge, gas, and flow velocity, making it difficult to achieve integrated management of early warning and dredging. This leads to the accumulation of hidden damage, which eventually evolves into sewage overflow, urban flooding, or soil loss around the pipe forming cavities, and may even cause systemic paralysis of the entire city's lifeline project, thus posing a serious threat to urban safety.
[0005] To address the aforementioned issues, developing a corrosion-resistant, self-cleaning drainage pipe system is of great practical significance. Summary of the Invention
[0006] The purpose of this invention is to provide a corrosion-resistant self-cleaning drainage pipe system. By setting a corrosion-resistant inner lining pipe, the system's durability is improved. The traction-type self-cleaning device realizes automated mechanical sludge removal. Combined with an intelligent monitoring device, it realizes real-time monitoring and automatic early warning of sludge and harmful gases, significantly reducing manual maintenance costs and safety risks, and realizing efficient and intelligent management of the drainage system.
[0007] To achieve the above objectives, the present invention provides a corrosion-resistant self-cleaning drainage pipeline system, comprising an inspection well, a corrosion-resistant drainage pipeline, a pipeline self-cleaning device, an intelligent monitoring device, and a controller. The end of the corrosion-resistant drainage pipeline is connected to the inspection well. The pipeline self-cleaning device is movably disposed within the corrosion-resistant drainage pipeline and is driven by a traction component disposed within the inspection well to reciprocate along the entire length of the corrosion-resistant drainage pipeline, thereby stripping sludge and transporting it to the inspection well. The intelligent monitoring device is disposed both inside the inspection well and on the pipeline self-cleaning device, for real-time monitoring of relevant operating indicators and automatic triggering of sludge removal commands or safety warnings. The controller is disposed outside the well and is electrically connected to the intelligent monitoring device.
[0008] Preferably, the inspection well includes a concrete well cylinder, a first well cover, and a second well cover. The first well cover is connected to the concrete well cylinder by a socket connection, and the second well cover is connected to the concrete well cylinder by a well seat hook.
[0009] Preferably, the corrosion-resistant drainage pipe includes an outer concrete pipe and an inner corrosion-resistant high-density polyethylene pipe, which are integrally formed by pouring concrete around the corrosion-resistant high-density polyethylene pipe as a core mold, and the outer surface of the corrosion-resistant high-density polyethylene pipe is provided with textured grooves for interlocking with the concrete.
[0010] Preferably, the pipeline self-cleaning device includes a cleaning component, a traction component, and an external water supply component. The cleaning component includes a ring and a steel plate, with the steel plate welded inside the ring to block impurities from passing through. The traction component includes a motor, a steel pipe, a steel wire rope, and a steel frame. The steel pipe is vertically welded to the lower surface of the second manhole cover, the motor is vertically welded to the steel pipe, and the steel frame is welded to the ring. One end of the steel wire rope is connected to the motor, and the other end is connected to the steel frame by bolts. The external water supply component includes a water tank and a steel water pipe, with both ends of the steel water pipe connected to the water tank and the corrosion-resistant drainage pipe, respectively.
[0011] Preferably, the intelligent monitoring device includes a flow rate monitoring element, a sludge monitoring element, and a methane monitoring element electrically connected to the controller. The flow rate monitoring element is fixed to the inner surface of the ring by bolts and is used to detect the fluid flow rate in the pipeline. The sludge monitoring element is fixed to the inside of the concrete well cylinder by bolts and is used to monitor the sludge height in the concrete well cylinder. The methane monitoring element is fixed to the lower surface of the second well cover by bolts and is used to detect the methane concentration in the concrete well cylinder.
[0012] Preferably, the steel pipe is equipped with an intelligent drain valve, which is electrically connected to the controller.
[0013] Preferably, the steel plate is a semi-circular plate, and the steel plate has several holes.
[0014] The beneficial effects of this invention are: (1) Excellent corrosion resistance: The concrete and high-density polyethylene composite structure is adopted. The inner high-density polyethylene is resistant to acid and alkali and corrosion, while the outer concrete ensures the structural strength and significantly extends the service life of the pipeline. (2) Automatic dredging is efficient and reliable: The pipeline self-cleaning device moves back and forth throughout the entire process under the drive of the traction component. With the help of external water supply flushing, it can automatically peel off and transport sludge to the inspection well. There is no need for manual operation in the well. The dredging efficiency is high and the safety is good. (3) Intelligent monitoring and automatic linkage: Real-time monitoring of parameters such as flow velocity, sludge height, and methane concentration, automatically triggering sludge removal or early warning, realizing unattended operation and intelligent maintenance, and reducing pipeline management costs; (4) Stable structure and convenient installation: The inspection well adopts double-layer well cover and socket and hook connection, which has higher sealing and safety. The composite pipe is integrally formed and firmly interlocked, making the construction and maintenance of the whole system convenient.
[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0016] Figure 1 The internal structure of the inspection well in this invention Figure 1 ; Figure 2 The internal structure of the inspection well in this invention Figure 2 ; Figure 3 This is an internal view of the corrosion-resistant drainage pipe in this invention; Figure 4 This is a schematic diagram of the self-cleaning device in this invention; Figure 5 This is a schematic diagram of a corrosion-resistant self-cleaning drainage pipe system according to the present invention.
[0017] The components include: 1. First manhole cover; 2. Inspection well; 3. Steel pipe; 4. Corrosion-resistant drainage pipe; 5. Silt monitoring element; 6. Second manhole cover; 7. Motor; 8. Methane monitoring element; 9. Concrete pipe; 10. Corrosion-resistant high-density polyethylene pipe; 11. Steel wire rope; 12. Steel frame; 13. Flow velocity monitoring element; 14. Steel plate; 15. Ring; 16. Steel water pipe; 17. Water tank; and 18. Intelligent drainage valve. Detailed Implementation
[0018] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.
[0019] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0020] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0021] Example like Figure 1-5 As shown, a corrosion-resistant self-cleaning drainage pipeline system includes a manhole 2, a corrosion-resistant drainage pipeline 4, a pipeline self-cleaning device, an intelligent monitoring device, and a controller. The manhole 2 provides temporary storage space for the sludge transported by the pipeline self-cleaning device. The end of the corrosion-resistant drainage pipeline 4 is connected to the manhole 2. The pipeline self-cleaning device is movably installed inside the corrosion-resistant drainage pipeline 4 and is driven by a traction component installed inside the manhole 2, causing it to reciprocate along the entire length of the corrosion-resistant drainage pipeline 4, stripping and transporting the sludge to the manhole 2, achieving continuous self-cleaning. The intelligent monitoring device is installed both inside the manhole 2 and on the pipeline self-cleaning device to monitor relevant operating indicators in real time and automatically trigger sludge removal commands or safety warnings. The controller is installed outside the manhole and electrically connected to the intelligent monitoring device. The controller can be reserved with an IoT interface to connect this device to the city's drainage system's smart management platform, proactively mitigating sudden overflows, pipe bursts, and other urban lifeline accidents, reducing direct economic losses and public safety hazards.
[0022] The inspection well 2 includes a concrete well cylinder, a first well cover 1 and a second well cover 6. The first well cover 1 is connected to the concrete well cylinder by a socket connection, and the second well cover 6 is connected to the concrete well cylinder by a well seat hook.
[0023] The corrosion-resistant drainage pipe 4 includes an outer concrete pipe 9 and an inner corrosion-resistant high-density polyethylene pipe 10. The two are integrally formed by pouring concrete around the corrosion-resistant high-density polyethylene pipe 10 as a core mold. To enhance the bonding force between the two materials, the outer surface of the corrosion-resistant high-density polyethylene pipe 10 is provided with textured grooves for interlocking with the concrete. These grooves interlock with the concrete during the pouring process, effectively preventing the corrosion-resistant high-density polyethylene pipe 10 from separating from the concrete during use.
[0024] The pipeline self-cleaning device includes a cleaning component, a traction component, and an external water supply component. The cleaning component includes a ring 15 and a steel plate 14. The steel plate 14 is welded inside the ring 15 to block impurities from passing through. The steel plate 14 is a semi-circular plate with several holes. This structure can block most of the silt and other impurities from passing through while allowing some water to flow through, reducing the water flow resistance when the cleaning component moves. The traction component includes a motor 7, a steel pipe 3, a steel wire rope 11, and a steel frame 12. The steel pipe 3 is vertically welded to the lower surface of the second manhole cover 6 to provide a stable mounting base for the motor 7. The motor 7 is vertically welded to the steel pipe 3. The steel frame 12 is welded to the ring 15. One end of the steel wire rope 11 is connected to the power output end of the motor 7, and the other end is connected to the steel frame 12 by bolts. When the motor 7 rotates forward and backward, the cleaning component can be pulled back and forth in the pipeline by the steel wire rope 11, peeling off the deposited silt from the pipe wall and pushing it to the bottom of the inspection well 2. The external water supply assembly includes a water tank 17 and a steel water pipe 16. Both ends of the steel water pipe 16 are connected to the water tank 17 and the corrosion-resistant drainage pipe 4, respectively. During the dredging process, water can be injected into the pipe through the external water supply assembly to improve the dredging effect, dilute and help transport the sludge.
[0025] The intelligent monitoring device includes a flow rate monitoring element 13, a sludge monitoring element 5, and a methane monitoring element 8, which are electrically connected to the controller. The flow rate monitoring element 13 is fixed to the inner surface of the ring 15 by bolts and is used to detect the flow rate of the fluid in the pipeline. The sludge monitoring element 5 is fixed to the inside of the concrete well cylinder by bolts and is used to monitor the sludge height in the concrete well cylinder. The methane monitoring element 8 is fixed to the lower surface of the second well cover 6 by bolts and is used to detect the methane concentration in the concrete well cylinder.
[0026] A smart drain valve 18 is installed on the steel water pipe 16, and the smart drain valve 18 is electrically connected to the controller. After the controller starts the dredging program or receives an instruction, it can automatically open the smart drain valve 18 to achieve drainage to assist in dredging.
[0027] Working Principle: The various monitoring elements of the intelligent monitoring device continuously send data to the controller. When the sludge monitoring element 5 detects excessive sludge at the bottom of the well, or the flow velocity monitoring element 13 detects that the flow velocity in the pipe is lower than the set value, the controller determines that dredging is necessary. The controller first opens the intelligent drain valve 18 to inject water into the pipe. Then, the motor 7 is started, and the cleaning component is pulled from the starting position to the other end inspection well 2 via the steel wire rope 11. During the movement, the ring 15 of the cleaning component scrapes the pipe wall to remove sludge, and the steel plate 14 pushes the sludge. After reaching the other end, the motor 7 in the other end inspection well 2 reverses, pulling the cleaning component back to its original position. After repeating this process several times, the sludge is concentrated and pushed into the bottom of the inspection well 2, where it is then transported away by a subsequent dredging vehicle. If the methane monitoring element 8 detects that the methane concentration exceeds the standard, the controller immediately issues an audible and visual alarm to alert personnel to safety.
[0028] Therefore, the present invention provides a corrosion-resistant self-cleaning drainage pipe system with the above-mentioned structure. By setting a corrosion-resistant inner lining pipe, the system durability is improved. The traction-type self-cleaning device realizes automated mechanical sludge removal. Combined with an intelligent monitoring device, it realizes real-time monitoring and automatic early warning of sludge and harmful gases, which significantly reduces manual maintenance costs and safety risks, and realizes efficient and intelligent management of the drainage system.
[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.
Claims
1. A corrosion-resistant self-cleaning drainage pipe system, characterized in that: The system includes an inspection well, a corrosion-resistant drainage pipe, a pipe self-cleaning device, an intelligent monitoring device, and a controller. The end of the corrosion-resistant drainage pipe is connected to the inspection well. The pipe self-cleaning device is movably installed inside the corrosion-resistant drainage pipe and is driven by a traction component installed in the inspection well to move back and forth along the entire length of the corrosion-resistant drainage pipe, stripping sludge and transporting it to the inspection well. The intelligent monitoring device is installed inside the inspection well and on the pipe self-cleaning device, respectively, for real-time monitoring of relevant operating indicators and automatic triggering of sludge removal commands or safety warnings. The controller is installed outside the well and is electrically connected to the intelligent monitoring device.
2. The corrosion-resistant self-cleaning drainage pipe system according to claim 1, characterized in that: The inspection well includes a concrete well cylinder, a first well cover, and a second well cover. The first well cover is connected to the concrete well cylinder by a socket connection, and the second well cover is connected to the concrete well cylinder by a well seat hook.
3. The corrosion-resistant self-cleaning drainage pipe system according to claim 2, characterized in that: The corrosion-resistant drainage pipe includes an outer concrete pipe and an inner corrosion-resistant high-density polyethylene pipe, which are integrally formed by pouring concrete around the corrosion-resistant high-density polyethylene pipe as a core mold. The outer surface of the corrosion-resistant high-density polyethylene pipe is provided with textured grooves for interlocking with the concrete.
4. The corrosion-resistant self-cleaning drainage pipe system according to claim 3, characterized in that: The pipeline self-cleaning device includes a cleaning component, a traction component, and an external water supply component. The cleaning component includes a ring and a steel plate, with the steel plate welded inside the ring to block impurities from passing through. The traction component includes a motor, a steel pipe, a steel wire rope, and a steel frame. The steel pipe is vertically welded to the lower surface of the second manhole cover, the motor is vertically welded to the steel pipe, and the steel frame is welded to the ring. One end of the steel wire rope is connected to the motor, and the other end is connected to the steel frame via bolts. The external water supply component includes a water tank and a steel water pipe, with both ends of the steel water pipe connected to the water tank and the corrosion-resistant drainage pipe, respectively.
5. The corrosion-resistant self-cleaning drainage pipe system according to claim 4, characterized in that: The intelligent monitoring device includes a flow rate monitoring element, a sludge monitoring element, and a methane monitoring element electrically connected to the controller. The flow rate monitoring element is fixed to the inner surface of the ring by bolts and is used to detect the fluid flow rate in the pipeline. The sludge monitoring element is fixed to the inside of the concrete well cylinder by bolts and is used to monitor the sludge height in the concrete well cylinder. The methane monitoring element is fixed to the lower surface of the second well cover by bolts and is used to detect the methane concentration in the concrete well cylinder.
6. The corrosion-resistant self-cleaning drainage pipe system according to claim 5, characterized in that: The steel pipe is equipped with an intelligent drain valve, which is electrically connected to the controller.
7. A corrosion-resistant self-cleaning drainage pipe system according to claim 6, characterized in that: The steel plate is a semi-circular plate, and several holes are formed in the steel plate.