Urban drainage pipe network repairing method

Abstract

The invention relates to the technical field of pipe network repair, in particular to an urban drainage pipe network repair method, which comprises the following steps of: comprehensively detecting a target drainage pipeline by using a pipeline endoscope; closing two ends of the damaged pipeline according to a detection result; according to the pipe diameter and material of the pipeline, selecting a ring blade device capable of clinging to the inner wall of the drainage pipe; slowly feeding the ring blade device into the pipeline to enable the ring blade to cling to the inner wall of the pipeline; the annular blade device is started to enable an annular blade to rotate, and sundries adsorbed on the inner wall of the pipeline are scraped; slowly withdrawing the annular blade device from the pipeline; high-pressure water jet equipment is started, and residual sundries in the pipeline are flushed; the pipeline is subjected to ultraviolet curing repair, hard attachments on the inner wall of the pipeline are scraped through mechanical rotation and reciprocating motion of a circular blade in the circular blade device, and residual sundries in the pipeline are flushed in cooperation with high-pressure water jet, so that the influence of the sundries adsorbed on the inner wall of the pipeline on ultraviolet curing repair of the pipeline is avoided.

Description

Technical Field

[0001] This invention relates to the field of pipeline repair technology, and in particular to a method for repairing urban drainage pipeline networks. Background Technology

[0002] Traditional urban drainage network repair requires extensive trench excavation to directly replace damaged pipes. However, this method generates noise and dust pollution, and damages soil structure and surrounding vegetation.

[0003] Existing methods for repairing urban drainage pipe networks employ ultraviolet (UV) curing. This involves inserting a resin hose into the old pipe and inflating it; then, a UV curing vehicle moves inside the pipe, using UV light of a specific wavelength to induce a polymerization reaction in the resin; finally, the repaired pipe undergoes quality testing. UV curing can be performed at room temperature and eliminates the need for road excavation, thus reducing noise and dust pollution and protecting soil and vegetation.

[0004] However, when using existing UV curing to repair urban drainage pipe networks, the inner walls of these pipes often accumulate impurities that are difficult to remove by spraying water due to long-term use. These impurities block UV light, preventing the resin from fully absorbing light energy and resulting in incomplete curing. Summary of the Invention

[0005] The purpose of this invention is to provide a method for repairing urban drainage pipe networks, which aims to solve the problem that when repairing urban drainage pipe networks with ultraviolet light, due to long-term use, the inner wall of the pipes usually adsorbs some impurities that are difficult to remove by spraying water. These impurities block ultraviolet light, preventing the resin from fully absorbing light energy, thus leading to incomplete curing reaction.

[0006] To achieve the above objectives, the present invention provides a method for repairing urban drainage pipe networks, comprising the following steps: A comprehensive inspection of the target drainage pipe was conducted using a pipe endoscope. Based on the test results, both ends of the damaged pipeline were sealed off; Select a ring blade device that can fit tightly against the inner wall of the drain pipe, based on the pipe diameter and material. Slowly insert the circular blade device into the pipe so that the circular blade is in close contact with the inner wall of the pipe; Start the circular blade device to make the circular blade rotate and scrape off the debris adsorbed on the inner wall of the pipe; Slowly withdraw the annular blade assembly from the pipeline; Turn on the high-pressure water jet equipment to flush out any remaining debris inside the pipe; The pipeline is repaired using ultraviolet light curing.

[0007] The step of selecting a circular blade device that can fit tightly against the inner wall of the drain pipe, based on the pipe diameter and material, further includes: The circular blade device includes a rotatable circular blade, a drive mechanism, and a pressure control mechanism. The edge of the circular blade is serrated.

[0008] The ultraviolet curing repair of the pipeline includes the following steps: Select the flexible tube impregnated with photosensitive resin according to the pipe diameter and length; Smoothly and slowly pull the hose into the cleaned existing pipe; Compressed air is used to expand the hose, allowing it to fully expand and fit snugly against the inner wall of the original pipe. Place the UV curing lamp into the repair pipe that has been filled with compressed air, and turn on the UV curing lamp to cure; After curing is complete, turn off the UV curing lamp and remove it from the pipe.

[0009] The step of using compressed air to expand the hose, allowing it to fully expand and fit snugly against the inner wall of the original pipe, also includes: The inflation pressure is maintained at 0.1 - 0.3 MPa.

[0010] The ultraviolet curing repair of the pipeline also includes the following steps: After the repair is completed, a comprehensive inspection of the repaired pipeline is carried out again using a pipeline endoscope.

[0011] The ultraviolet curing repair of the pipeline also includes the following steps: A water pressure test was conducted on the pipeline using a pressure testing method.

[0012] The ultraviolet curing repair of the pipeline also includes the following steps: The quality of the repair is assessed based on the results of testing and experiments.

[0013] The present invention discloses a method for repairing urban drainage pipe networks. By using the mechanical rotation and reciprocating motion of the circular blades in the circular blade device, the sharpness of the blade edges is used to scrape away hard deposits on the inner wall of the pipe. In conjunction with high-pressure water jets, the remaining debris in the pipe is flushed away, thereby avoiding the impact of the debris adsorbed on the inner wall of the pipe on the ultraviolet curing repair of the pipe. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a flowchart illustrating the steps of the urban drainage pipe network repair method of the present invention.

[0016] Figure 2 This is a step diagram of the UV curing repair process of the present invention. Detailed Implementation

[0017] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0018] Please see Figure 1 and Figure 2 ,in Figure 1 This is a schematic diagram of the urban drainage pipe network repair method of the present invention. Figure 2 This is a schematic diagram of the structure of the UV curing repair of the present invention.

[0019] This invention provides a quick-release interchangeable air guide cover conversion method, comprising the following steps: S101: Conduct a comprehensive inspection of the target drainage pipe using a pipe endoscope; S102: Based on the test results, seal both ends of the damaged pipeline; S103: Select a ring blade device that can fit tightly against the inner wall of the drain pipe, based on the pipe diameter and material. S104: Slowly insert the circular blade device into the pipe so that the circular blade is in close contact with the inner wall of the pipe; S105: Activate the circular blade device to make the circular blade rotate and scrape off the debris adsorbed on the inner wall of the pipe; S106: Slowly withdraw the annular blade assembly from the pipeline; S107: Turn on the high-pressure water jet equipment to flush out any remaining debris in the pipe; S108: Ultraviolet curing repair of pipelines.

[0020] Furthermore, a comprehensive inspection of the target drainage pipe is conducted using a pipe endoscope and CCTV inspection technology. This accurately determines the pipe's material, diameter, length, direction, and the distribution, type, and thickness of debris on the inner wall. Based on the inspection results, both ends of the damaged pipe are sealed to prevent sewage overflow and debris entry, creating a safe and sealed environment for subsequent construction. A suitable circular blade device, designed to fit snugly against the inner wall of the drainage pipe, is selected according to the pipe's diameter and material. The circular blade device includes a rotatable circular blade, a drive mechanism, and a pressure control mechanism. The circular blade is made of cemented carbide or a metal material coated with a high-hardness coating such as tungsten carbide. The blade edge is sharply serrated to improve the scraping effect. The circular blade device is slowly inserted into the pipe, and the pressure control mechanism adjusts the pressure between the circular blade and the inner wall of the pipe to ensure the circular blade adheres tightly to the inner wall. The pressure control mechanism automatically adjusts the pressure according to the pipe material. For rigid pipes such as concrete and cast iron pipes, the pressure can be appropriately increased; for plastic pipes, the pressure must be controlled within a safe range to avoid scratching the inner wall. By activating the drive mechanism, the circular blades rotate or reciprocate to scrape away debris adhering to the inner wall of the pipe. After scraping, slowly withdraw the circular blade device from the pipe and connect the high-pressure water jet device to one end of the pipe, adjusting the pressure and flow rate of the high-pressure water jet. The pressure should be selected according to the pipe material and the degree of fouling; for rigid pipes, the pressure can be set at 20-50 MPa; for plastic pipes, the pressure should be controlled at 10-20 MPa. The flow rate can be adjusted according to the pipe diameter and length to ensure thorough flushing of debris inside the pipe. Turn on the high-pressure water jet device, spraying high-pressure water into the pipe from one end and out from the other, thoroughly flushing away any remaining debris inside the pipe. During flushing, the direction and angle of the high-pressure water jet can be adjusted to ensure that all parts of the pipe are cleaned. After flushing, use a vacuum truck to remove the sewage and debris from the pipe, keeping the pipe clean. Finally, the pipeline is repaired using UV curing technology. This process utilizes the mechanical rotation and reciprocating motion of a circular blade to scrape away hard deposits from the inner wall of the pipeline using the sharpness of the blade edge. In addition, high-pressure water jets are used to flush away any remaining debris inside the pipeline, thus preventing the debris adsorbed on the inner wall of the pipeline from affecting the UV curing repair process.

[0021] S109: After the repair is completed, the repaired pipeline is thoroughly inspected again using a pipeline endoscope.

[0022] Furthermore, after the repair is completed, the repaired pipeline is thoroughly inspected again using CCTV inspection technology via a pipeline endoscope to check whether the pipeline's inner wall smoothness, sealing performance, strength, and other indicators meet the design requirements.

[0023] S110: Conduct a water pressure test on the pipeline using a pressure testing method.

[0024] Furthermore, a pressure test is conducted on the pipeline to verify its pressure resistance. The test pressure should be determined based on the pipeline's design pressure, generally not less than 1.5 times the design pressure. The test pressure should be maintained for a certain period of time (more than 30 minutes), and the pipeline should be observed for any leakage.

[0025] S111: Evaluate the quality of the repair based on the results of testing and experiments.

[0026] Furthermore, the quality of the repair is evaluated based on the test results. Through quality evaluation, it is possible to detect whether there are structural defects such as cracks, deformation, or collapse in the repaired pipeline, ensuring that the pipeline can be used safely for a long time.

[0027] S201: Select a flexible tube impregnated with photosensitive resin according to the pipe diameter and length; S202: Smoothly and slowly pull the hose into the cleaned existing pipe; S203: Compressed air is used to expand the hose, allowing the hose to fully expand and fit tightly against the inner wall of the original pipe; S204: Place the UV curing lamp into the repair pipe that has been filled with compressed air, and turn on the UV curing lamp to cure; S205: After curing is complete, turn off the UV curing lamp and remove it from the pipe.

[0028] Further, select a suitable size flexible tube impregnated with photosensitive resin based on the pipe's diameter and length. Smoothly and slowly pull the tube into the cleaned existing pipe, ensuring a tight fit against the pipe's inner wall without wrinkles or twists. Use compressed air to expand the tube, ensuring it fully inflates and adheres tightly to the existing pipe's inner wall. The inflation pressure should be controlled according to the tube's material and specifications, maintaining a range of 0.1-0.3 MPa to ensure uniform expansion. Place the UV curing lamp into the compressed air-filled repair pipe and turn it on, using a specific wavelength of ultraviolet light to cure the repair material. During curing, monitor the curing progress in real time, adjusting the UV curing lamp's movement speed and intensity to ensure complete resin curing. The curing time depends on factors such as the pipe's diameter, ambient temperature, and resin type, ranging from 30 minutes to several hours. After curing, turn off the UV curing lamp and remove the tube from the pipe. Once the pipe has cooled to room temperature, remove the sealing devices at both ends of the pipe to restore normal use.

[0029] When using the urban drainage pipe network repair method of this embodiment, the mechanical rotation and reciprocating motion of the circular blade of the circular blade device is used to scrape off the hard deposits on the inner wall of the pipe by utilizing the sharpness of the blade edge, and high-pressure water jet is used to flush the remaining debris in the pipe, thereby avoiding the impact of the debris adsorbed on the inner wall of the pipe on the ultraviolet curing repair of the pipe.

[0030] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A method for repairing urban drainage pipe networks, characterized in that, Includes the following steps: A comprehensive inspection of the target drainage pipe was conducted using a pipe endoscope. Based on the test results, both ends of the damaged pipeline were sealed off; Select a ring blade device that can fit tightly against the inner wall of the drain pipe, based on the pipe diameter and material. Slowly insert the circular blade device into the pipe so that the circular blade is in close contact with the inner wall of the pipe; Start the circular blade device to make the circular blade rotate and scrape off the debris adsorbed on the inner wall of the pipe; Slowly withdraw the annular blade assembly from the pipeline; Turn on the high-pressure water jet equipment to flush out any remaining debris inside the pipe; The pipeline was repaired using ultraviolet light curing.

2. The urban drainage pipe network repair method as described in claim 1, characterized in that, Based on the pipe diameter and material, a circular blade device capable of adhering tightly to the inner wall of the drain pipe is selected. The steps also include: The circular blade device includes a rotatable circular blade, a drive mechanism, and a pressure control mechanism. The edge of the circular blade is serrated.

3. The urban drainage pipe network repair method as described in claim 1, characterized in that, The steps of performing UV curing repair on the pipeline include: Select the flexible tube impregnated with photosensitive resin according to the pipe diameter and length; Smoothly and slowly pull the hose into the cleaned existing pipe; Compressed air is used to expand the hose, allowing it to fully expand and fit snugly against the inner wall of the original pipe. Place the UV curing lamp into the repair pipe that has been filled with compressed air, and turn on the UV curing lamp to cure; After curing is complete, turn off the UV curing lamp and remove it from the pipe.

4. The urban drainage pipe network repair method as described in claim 3, characterized in that, The step of using compressed air to expand the hose, allowing it to fully expand and fit snugly against the inner wall of the original pipe, further includes: The inflation pressure is maintained at 0.1 - 0.3 MPa.

5. The urban drainage pipe network repair method as described in claim 1, characterized in that, The steps of performing UV curing repair on the pipeline also include: After the repair is completed, a comprehensive inspection of the repaired pipeline is carried out again using a pipeline endoscope.

6. The urban drainage pipe network repair method as described in claim 5, characterized in that, The steps of performing UV curing repair on the pipeline also include: A water pressure test was conducted on the pipeline using a pressure testing method.

7. The urban drainage pipe network repair method as described in claim 6, characterized in that, The steps of performing UV curing repair on the pipeline also include: The quality of the repair is assessed based on the results of testing and experiments.

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