Method for repairing inspection well through ultraviolet curing
By using UV-curing materials and airlock technology, the problems of high cost and poor durability in traditional manhole repair have been solved, achieving efficient and low-cost manhole repair while ensuring smooth and safe construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2026-03-13
AI Technical Summary
Traditional manhole repair methods are costly, have poor durability, are prone to detachment, and have a significant environmental impact.
The material is made of one-piece molded UV curing material. It is pressed into the well wall by air circulation and curing. Combined with air lock and UV lamp with adjustable lamp chain length, it can be used to repair inspection wells at multiple depths, ensuring stable air pressure and smooth construction.
This method enables high-quality one-time repair of inspection wells, avoids material detachment, reduces construction costs, minimizes environmental impact, and improves construction efficiency and safety.
Smart Images
Figure CN121654166A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of municipal repair, and more particularly to the repair of municipal pipeline inspection wells. Background Technology
[0002] Inspection wells are an important component of urban underground infrastructure. They are located at pipe diameter and direction changes, or in the middle of long pipelines, playing a vital role in pipeline maintenance, inspection, sewage and water conveyance.
[0003] During actual inspections and maintenance, defects such as leakage, cracking, and detachment were found in manholes. These defects must be repaired promptly, otherwise they can easily cause road collapses, threatening the safety of people's lives and property. Traditional manhole repair methods involve excavating and rebuilding the manhole, costing between 20,000 and 80,000 yuan, or using centrifugal spraying. While centrifugal spraying can provide short-term repair, the sprayed material will peel off within one or two years, resulting in poor repair effectiveness. Therefore, it is necessary to find a high-quality, low-cost, and durable method to repair manholes. To this end, we propose a method of repairing manholes using ultraviolet light curing. Summary of the Invention
[0004] To overcome the shortcomings of existing technologies, this invention provides a method for repairing inspection wells using ultraviolet (UV) curing. This invention utilizes an integrally molded UV curing material, suitable for inspection wells of various shapes, to perform a one-time repair of the well shaft and bottom. By pressurizing and venting, the UV curing material is tightly adhered to the well wall and cured, preventing detachment. Adjusting the length of the UV lamp chain ensures curing for inspection wells of various depths. During the curing process, an airlock is used to firmly trap the gas within the UV resin material, maintaining stable air pressure and allowing the UV curing lamp to smoothly enter the well, increasing the smoothness of the construction process.
[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a method for repairing inspection wells using ultraviolet light curing, the specific steps of which are as follows: S1: Close the water supply and drainage gates, use airbags to seal the upstream and downstream water outlets, dewater the downstream manholes, clean the manholes with high-pressure water, measure the manhole dimensions, and customize UV-cured resin material for sealing the bottom of the manholes.
[0006] S2: After the manhole wall is no longer wet, put one end of the UV-cured resin material into the manhole and tie the other end with a knot. Then place the knot on the support frame above the manhole and use an air compressor to inflate the knot to support the UV-cured material.
[0007] Furthermore, the dimensions of the UV-curable resin material are matched to the inspection well, and the ends of the UV-curable resin material are sealed.
[0008] S3: Pull out the rope from the air lock, connect it to the end cap of the knot, tie one end of the air lock to the knot, and then use the rope from the air lock to pull out the end cap of the knot and tie the other end of the air lock.
[0009] Furthermore, the air lock is a cylindrical plastic bag with openings at both ends, and a rope is pre-installed inside the air lock.
[0010] S4: Open the end of the air lock, install the UV curing lamp, and after the UV curing lamp enters the inspection well, seal the end cap with the end cap, and then remove the air lock.
[0011] Furthermore, the end of the ultraviolet curing lamp assembly is provided with a buckle, which can increase or decrease the number of ultraviolet curing lamp assemblies according to the well depth.
[0012] S5: Turn on the air compressor and fill the UV curing material with air through the nozzle. After the UV curing material is supported and tightly attached to the inspection well, turn on the UV curing lamp and slowly move the UV curing lamp assembly towards the well opening to complete the curing.
[0013] S6: After curing is complete, untie the knot, remove the UV curing lamp assembly, and ventilate the inspection well.
[0014] S7: Remove the UV-cured material at the bottom of the manhole to complete the manhole repair.
[0015] Compared with the prior art, the beneficial effects that this invention can achieve are: This invention utilizes an integrally molded UV-curable material suitable for inspection wells of various shapes, enabling one-time repair of the well shaft and bottom. Through pressurization and ventilation, the UV-curable material is tightly adhered to the well wall and cured, preventing detachment. Adjusting the length of the UV lamp chain ensures curing for inspection wells of varying depths. During curing, an airlock is used to firmly trap gas within the UV resin material, maintaining stable air pressure and facilitating the smooth insertion of the UV curing lamp into the well, thus increasing the efficiency of the installation process. Attached Figure Description
[0016] Figure 1 This is a flowchart illustrating a method for repairing inspection wells using ultraviolet light curing, according to an embodiment of the present invention. Detailed Implementation
[0017] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified. Example
[0018] like Figure 1 As shown in the figure, this embodiment proposes a method for repairing inspection wells using ultraviolet light curing, and the specific steps are as follows; S1: Close the water supply and drainage gates, and use airbags to seal the upstream and downstream outlet pipes to ensure effective control of water flow in the construction area. Dewater the downstream manholes to lower the water level and facilitate subsequent construction. Then, clean the manholes with high-pressure water to thoroughly remove dirt and impurities, ensuring a clean construction environment. Measure the dimensions of the manholes and customize the UV-curable resin material for sealing the bottom based on the measurements, ensuring the material dimensions match the manhole dimensions to guarantee construction quality and effectiveness. Before using airbags to seal the pipes, a leak check is required to ensure the airbags are leak-free and the inflation pressure is controlled within the specified range to prevent rupture. Simultaneously, during dewatering, the manholes must be cleaned with high-pressure water, and the dimensions of the manhole shaft and chamber must be accurately measured to customize suitable UV-curable resin materials.
[0019] Specifically, the dimensions of the UV-curable resin material are matched to the inspection well, and the ends of the UV-curable resin material are sealed to ensure that the material can be smoothly pulled in and cured through the inspection well. This allows for overall or partial repair of the pipeline without excavation, significantly reducing the construction footprint and impact on the surrounding environment. The advantages of the sealed ends of the UV-curable resin material are: it effectively prevents resin from flowing out before curing, thus ensuring the repair effect; at the same time, the sealed state allows UV light to be more concentrated on the resin material, accelerating the curing speed and improving repair efficiency.
[0020] S2: Before placing the UV-curable resin material into the inspection well, ensure that the well wall is dry to guarantee a tight fit between the material and the wall. Once the well wall is dry, place one end of the UV-curable resin material into the inspection well and tie the other end with a knot, ensuring the knot is installed correctly. Knots with air inlets should be installed in the end well, and knots without air inlets should be installed in the beginning well. Then place the knot on the support frame above the inspection well and use an air compressor to inflate the knot. Control the air pressure during inflation to prevent excessive expansion and damage to the material, thus supporting the UV-curable material. This step is crucial for the UV-curable lining repair and replacement project and must be performed according to regulations to ensure repair quality.
[0021] S3: Pull out the rope from the air lock and connect it to the end cap of the tether. Ensure the connection is secure to prevent it from coming loose during subsequent operations. Tie one end of the air lock to the tether and use the rope from the air lock to pull out the end cap of the tether. This process should be done slowly to avoid damaging the air lock or the tether. After pulling out the end cap of the tether, tie the other end of the air lock tightly to ensure that the air lock will not come loose during inflation.
[0022] Specifically, the air lock is a cylindrical plastic bag with openings at both ends. A rope is pre-installed inside the air lock for easy operation, ensuring a secure connection between the air lock and the binding head, and allowing the end cap of the binding head to be pulled out smoothly in subsequent steps. At the same time, it ensures a tight tie and prevents the air lock from falling off during inflation. This design makes the entire operation process more stable and reliable, improving work efficiency and safety.
[0023] S4: Before installing the UV curing lamp, open the air lock end and ensure that the lamp is working properly, the lamp base is clean, and there are no other impurities. Hold one end of the flexible tube with the safety tether attached upright and secure the air lock to this end with a strap. Make a palm-width opening near the air lock on the flexible tube. After the UV curing lamp enters the inspection well, seal the tether with the end cap. Ensure the lamp holder is fully inserted into the flexible tube, then seal the end cap again. Continue inflating to ensure the flexible tube fully conforms to the old tube. Finally, remove the air lock and proceed with the subsequent UV curing repair steps. Before installing the UV curing lamp, ensure the air lock end is fully open and check that the UV curing lamp is intact. When sealing the tether, ensure a tight seal to prevent air leakage from affecting the curing effect.
[0024] Specifically, the end of the UV curing lamp assembly is equipped with a buckle, which allows the number of UV curing lamp assemblies to be increased according to the well depth, adapting to different well depths. By increasing or decreasing the number of UV curing lamp assemblies, it can adapt to inspection wells of different depths, eliminating the need to prepare lamp assemblies of specific lengths for each well depth, thus improving construction efficiency and ensuring curing effect. Regardless of the well depth, the number of lamp assemblies can be adjusted to ensure that the UV light fully irradiates the hose, thereby guaranteeing the curing effect and quality.
[0025] S5: Turn on the air compressor and inflate the UV-curing material using the nozzle. Once the UV-curing material is supported and firmly attached to the inspection well, this step is crucial for ensuring effective curing. During inflation, the air pressure needs to be controlled to ensure the hose fully expands and adheres tightly to the existing pipe wall. Then, turn on the UV-curing lamp and slowly move the lamp assembly towards the well opening, while simultaneously controlling the lamp holder's movement speed to ensure the curing process is completed in one go. The entire curing process needs to be monitored, and the curing speed and pipe wall temperature should be automatically recorded to ensure curing quality. After curing, finishing work is required, such as cutting off excess material from the pipe end and removing the airbag to restore water flow. Before turning on the UV-curing lamp, ensure the UV-curing material is fully supported and firmly attached to the inspection well. When moving the UV-curing lamp assembly, maintain a uniform speed to ensure consistent curing results.
[0026] S6: After curing, untie the ties, remove the UV curing lamp assembly, and ventilate the inspection well. This step marks the final stage of the UV curing repair work. When removing the UV curing lamp assembly, ensure smooth operation to avoid damaging the inner lining pipe. Subsequently, fully ventilate the inspection well to ensure air circulation, remove any potentially harmful gases, and ensure operational safety. Additionally, cut off excess material from the pipe end, remove the airbag to restore water flow, and conduct necessary inspections to ensure the repair effect. The entire finishing process should be meticulous and orderly to ensure the successful completion of the pipeline repair work. Finally, conduct project acceptance, including visual inspection, sampling inspection, and leak detection, to ensure the repair quality meets standards. After curing, turn off the UV curing lamp before untying the ties to avoid burns. After removing the UV curing lamp assembly, fully ventilate the inspection well to ensure safe air inside.
[0027] S7: Remove the UV-curable material at the bottom of the manhole to complete the manhole repair. This step marks the final stage of the UV-curable repair work. Prior to this, the pipeline pretreatment has been completed, including water blocking, cleaning, inspection, and removal of obstructions. Subsequently, UV-curable full lining repair was performed, including pulling in a fiberglass tube impregnated with photosensitive resin, inflating it to fit tightly against the inner wall of the pipe, and curing the resin by irradiation with a UV lamp. After curing, the port needs to be treated by cutting off the seals at both ends of the fiberglass tube and performing a water tightness check to ensure the repair quality. Finally, open the inlet, and the pipeline can resume normal operation. When removing the UV-curable material, ensure that the cut is smooth and does not affect the normal use of the manhole. After the repair is completed, the manhole needs to be inspected again to ensure a good repair effect.
[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. A method for repairing inspection wells using ultraviolet light curing, characterized in that... Includes the following steps: S1: Close the water supply and drainage gates, use airbags to seal the upstream and downstream outlets of the pipeline, dewater the downstream inspection wells, clean the inspection wells with high-pressure water, and measure the dimensions of the well shaft and chamber. S2: After the manhole wall is no longer wet, put one end of the UV-cured resin material into the manhole and tie the other end with a knot. Then place the knot on the support frame above the manhole and use an air compressor to inflate the knot to support the UV-cured material. S3: Pull out the rope from the air lock, connect it to the end cap of the knot, tie one end of the air lock to the knot, and then tie the other end of the air lock after pulling out the end cap of the knot using the rope from the air lock. S4: Open the end of the air lock, install the UV curing lamp, and after the UV curing lamp enters the inspection well, seal the end cap with the end cap, and then remove the air lock; S5: Turn on the air compressor and fill the UV curing material with air through the nozzle. After the UV curing material is supported and tightly attached to the inspection well, turn on the UV curing lamp and slowly move the UV curing lamp assembly towards the well opening to complete the curing. S6: After curing is complete, untie the knot, remove the UV curing lamp assembly, and ventilate the inspection well; S7: Remove the UV-cured material at the bottom of the manhole to complete the manhole repair.
2. The method for repairing inspection wells using ultraviolet light curing according to claim 1, characterized in that, The dimensions of the UV-curable resin material are matched to the inspection well, and the ends of the UV-curable resin material are sealed.
3. The method for repairing inspection wells using ultraviolet light curing according to claim 1, characterized in that, The air lock is a cylindrical plastic bag with openings at both ends, and a rope is pre-installed inside the air lock for easy operation later.
4. The method for repairing inspection wells using ultraviolet light curing according to claim 1, characterized in that, The ultraviolet curing lamp assembly is equipped with a buckle at its end. When the depth of the inspection well changes, the number of ultraviolet curing lamp assemblies can be increased or decreased according to the depth of the well to adapt to inspection wells of different depths.