Resin curing repair method for underground sewage pipeline

Abstract

The invention discloses an underground sewage pipeline resin curing and repairing method, and relates to the technical field of pipeline repairing, and the underground sewage pipeline resin curing and repairing method comprises the following steps: plugging the upstream and downstream of a to-be-repaired section; the interior of the to-be-repaired section is cleaned; determining a to-be-repaired position; mixing resin and a curing agent according to a preset proportion to form a resin adhesive; coating the resin adhesive on the glass fiber cloth; winding glass fiber cloth on the repairing device; dragging the repairing device to drive the glass fiber cloth to move to a to-be-repaired position; respectively communicating two ends of the air cavity of the repairing device with two ends of a circulating pipe, and sequentially communicating a pressurizer and a heater on the circulating pipe; a pressurizer is used for pressurizing the air cavity, and meanwhile, a heater is used for heating air in the circulating pipe, so that the glass fiber cloth on the repairing device is attached to the inner wall of the pipeline; after the resin adhesive is solidified, the air cavity is deflated, and the repairing device is separated from the inner wall of the pipeline. And the resin adhesive can be cured at a proper temperature, so that the curing effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline repair, and in particular to a resin curing and repairing method for an underground sewage pipeline. Background Art

[0002] Pipeline resin repair technology is a trenchless local lining repair method for drainage pipes. This method uses glass fiber cloth airbag local molding technology to make the glass fiber cloth coated with resin close to the mother pipe with an airbag and solidify it under normal temperature conditions. This technology protects the environment, saves resources, does not dig the road surface, does not generate garbage, does not block traffic, and greatly improves the image of pipeline repair construction.

[0003] At present, resin glue materials have high requirements for the curing environment. The ambient temperature directly determines the curing speed of the resin glue materials. The curing time is long in a low temperature environment, resulting in low efficiency of pipeline repair construction. In the resin glue curing process, due to the constant change of ambient temperature, the repair material is unevenly cured, resulting in insufficient fit between the repair material and the inner wall of the pipeline, affecting the pipeline repair effect. Summary of the invention

[0004] The main purpose of the present invention is to propose a resin curing repair method for underground sewage pipes, aiming to solve the technical problems in the prior art that the resin glue material takes a long time to cure in a low temperature environment, resulting in low construction efficiency, and the ambient temperature changes continuously, resulting in uneven curing of the repair material.

[0005] To achieve the above-mentioned purpose, the resin curing repair method for underground sewage pipes proposed in the present invention includes the following steps: sealing the upstream and downstream of the section to be repaired in the underground sewage pipe; cleaning the section to be repaired; determining the position to be repaired in the section to be repaired; mixing resin and curing agent in a preset proportion to form resin glue; applying the resin glue on glass fiber cloth; winding the glass fiber cloth onto a repairer; dragging the repairer to drive the glass fiber cloth to the position to be repaired; connecting the two ends of the air cavity of the repairer to the two ends of a circulation pipe respectively, and connecting a pressurizer and a heater to the circulation pipe in sequence; pressurizing the air cavity by the pressurizer, and heating the gas in the circulation pipe by the heater, so that the glass fiber cloth on the repairer fits the inner wall of the pipe; after the resin glue is solidified, removing the pressurizer and the heater to deflate the air cavity, and the repairer is separated from the inner wall of the pipe.

[0006] In one embodiment, the step of applying the resin glue on the glass fiber cloth includes: spreading the glass fiber cloth, and using a scraper to apply the resin glue on the upper surface of the glass fiber cloth; folding the glass fiber cloth inward by one-third along one side of its length direction, and the upper surface of the folded glass fiber cloth forms a first folding surface; using the scraper to apply the resin glue on the first folding surface; folding the glass fiber cloth inward by one-third along the other side of its length direction, and the upper surface of the folded glass fiber cloth forms a second folding surface; using the scraper to apply the resin glue on the second folding surface.

[0007] In one embodiment, the step of winding the glass fiber cloth onto the repairer includes: winding the glass fiber cloth onto the repairer along the length direction of the second folding surface; and tying the glass fiber cloth onto the repairer with thin iron wires on both sides along the width direction of the second folding surface.

[0008] In one embodiment, the step of determining the position to be repaired within the section to be repaired includes: pulling a traction rope between two inspection wells located at the entrance and exit of the section to be repaired; connecting a crawling robot equipped with a high-definition camera to the traction rope; and marking the position on the traction rope when the crawling robot detects the position to be repaired.

[0009] In one embodiment, the step of dragging the repairer to drive the glass fiber cloth to the position to be repaired includes: connecting the repairer to the traction rope; using the traction rope to drag the repairer to the marked position to drive the glass fiber cloth to the position to be repaired.

[0010] In one embodiment, the step of cleaning the section to be repaired includes: sucking and discharging sewage in the section to be repaired; injecting clean water into the section to be repaired and stirring to dilute the sludge in the section to be repaired into mud; sucking and discharging the mud at the inspection well at the outlet of the section to be repaired; high-pressure flushing of the section to be repaired; and cleaning solid residues in the section to be repaired.

[0011] In one embodiment, the step of high-pressure flushing of the section to be repaired includes: setting a high-pressure dredging vehicle at the inspection well located at the entrance of the section to be repaired; setting a sewage suction truck at the inspection well located at the exit of the section to be repaired; high-pressure flushing of the section to be repaired by the high-pressure dredging vehicle, and suctioning the inside of the section to be repaired by the sewage suction truck.

[0012] In one embodiment, the step of cleaning the solid residues in the section to be repaired includes: grinding the hardened cement slurry in the section to be repaired by a grinding robot; cutting the tree roots in the section to be repaired by a chain cutter; and lifting the solid residues in the section to be repaired to the outside of the inspection well through the inspection well.

[0013] In one embodiment, the step of blocking the upstream and downstream of the section to be repaired in the underground sewage pipe includes: blocking the outlet of the pipe located upstream of the section to be repaired; and blocking the inlet of the pipe located downstream of the section to be repaired.

[0014] In one embodiment, the step of blocking the outlet of the pipe located upstream of the section to be repaired includes: setting a baffle at the outlet of the pipe located upstream of the section to be repaired; using the baffle to set a rubber airbag at the outlet of the pipe located upstream of the section to be repaired; and inflating the rubber airbag until the outlet of the pipe located upstream of the section to be repaired is blocked by the baffle and the rubber airbag together.

[0015] The resin curing and repairing method for underground sewage pipes proposed by the present invention selects glass fiber cloth coated with resin glue as the repair material of the original pipe. The material has high strength, can effectively bear the pressure of the underground sewage pipe, has fast repair construction speed and high construction efficiency. Before the glass fiber cloth is attached to the original pipe of the section to be repaired, the pipes upstream and downstream of the section to be repaired are blocked, and the section to be repaired is cleaned to ensure that the inner wall of the pipe of the section to be repaired is kept clean and flat, so that the inner wall of the pipe of the section to be repaired can be closely attached to the glass fiber cloth. During the curing process of the resin glue on the glass fiber cloth, the pressurizer continuously pressurizes and supplies air to the air cavity of the repairer through the circulation pipe, and the heater continuously heats the gas in the circulation pipe to increase the gas temperature in the air cavity of the repairer, and the temperature in the air cavity is transmitted to the glass fiber cloth outside the air cavity, so that the curing temperature of the resin glue is increased, and the curing speed is effectively improved; and the switch of the heater can control the gas temperature in the circulation pipe, so that the resin glue on the glass fiber cloth is kept at a suitable temperature to complete the curing, improve the curing effect, and ensure that the glass fiber cloth is closely attached to the inner wall of the pipe of the section to be repaired, thereby improving the repair effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1A schematic diagram of a process flow of an embodiment of a resin curing repair method for underground sewage pipes provided by the present invention.

[0018] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] At present, resin glue materials have high requirements for the curing environment. The ambient temperature directly determines the curing speed of the resin glue materials. The curing time is long in a low temperature environment, resulting in low efficiency of pipeline repair construction. In the resin glue curing process, due to the constant change of ambient temperature, the repair material is unevenly cured, resulting in insufficient fit between the repair material and the inner wall of the pipeline, affecting the pipeline repair effect.

[0023] The present invention provides a resin curing and repairing method for underground sewage pipes, comprising the steps of:

[0024] S10: blocking the upstream and downstream of the section to be repaired in the underground sewage pipe;

[0025] S20: cleaning the section to be repaired;

[0026] S30: Determine the position to be repaired in the section to be repaired;

[0027] S40: mixing resin and curing agent according to a preset ratio to form resin glue;

[0028] S50: applying the resin glue on the glass fiber cloth;

[0029] S60: Winding the glass fiber cloth onto the repairer;

[0030] S70: dragging the repairer to drive the glass fiber cloth to move to the position to be repaired;

[0031] S80: connecting the two ends of the air cavity of the repair device to the two ends of a circulation pipe respectively, and connecting a pressurizer and a heater to the circulation pipe in sequence;

[0032] S90: using the pressurizer to pressurize the air cavity, and using the heater to heat the gas in the circulation pipe, so that the glass fiber cloth on the repairer fits with the inner wall of the pipe;

[0033] S100: After the resin glue solidifies, the pressurizer and the heater are removed to deflate the air cavity, and the repairer is separated from the inner wall of the pipeline.

[0034] See also Figure 1When repairing a section of pipeline to be repaired, the pipes located upstream and downstream of the section to be repaired in the underground sewage pipe are blocked respectively to cut off the section to be repaired from the underground sewage pipe, so as to create a closed environment for the section to be repaired. After blocking, it is necessary to clean the sewage and pollutants inside the section of pipeline to be repaired to ensure that the inner wall of the pipe and the glass fiber cloth can be well bonded. Then, an image detection device is used to perform image detection on the pipeline section to be repaired to determine the position to be repaired and the area to be repaired, and the size of the glass fiber cloth is selected according to the area to be repaired. According to the technical requirements of the repair material, the resin glue is prepared on site, and a stirrer is used to stir to ensure that the resin and the curing agent are evenly mixed. In one embodiment, the volume ratio of the resin and the curing agent is prepared according to 2:1. After the resin glue is prepared, the resin glue is immediately applied to the glass fiber cloth, and the glass fiber cloth is then wound outside the air cavity of the repairer so that the surface of the glass fiber cloth coated with the resin glue faces outward, and the repairer is dragged into the section to be repaired, so that the glass fiber cloth wound on the repairer is moved to the position to be repaired. Then, the circulation pipe is connected to the two openings of the air cavity of the repairer to form a circulating air flow between the circulation pipe and the air cavity, and a pressurizer and a heater are set on the circulation pipe. The air cavity is inflated by the pressurizer to gradually expand the air cavity until the glass fiber cloth outside the air cavity fits the position to be repaired. Then, the glass fiber cloth is kept in continuous fit with the position to be repaired, and the gas in the circulation pipe is heated by the heater to increase the temperature of the gas in the circulation pipe and the air cavity, so that the glass fiber cloth outside the air cavity is heated by the gas in the air cavity, the temperature of the glass fiber cloth is increased and the curing is completed, so that the glass fiber cloth is tightly fitted with the original pipe of the section to be repaired. After the resin glue is completely cured, the connection between the glass fiber cloth and the repairer is removed, the pressurizer and the heater are turned off, and the circulation pipe is removed to release the gas in the air cavity, so that the air cavity of the repairer is separated from the inner wall of the pipe to be repaired, and finally the repairer is removed to complete the repair of the section to be repaired.

[0035] The resin curing and repairing method for underground sewage pipes proposed by the present invention selects glass fiber cloth coated with resin glue as the repair material of the original pipe. The material has high strength, can effectively bear the pressure of the underground sewage pipe, has fast repair construction speed and high construction efficiency. Before the glass fiber cloth is attached to the original pipe of the section to be repaired, the pipes upstream and downstream of the section to be repaired are blocked, and the section to be repaired is cleaned to ensure that the inner wall of the pipe of the section to be repaired is kept clean and flat, so that the inner wall of the pipe of the section to be repaired can be closely attached to the glass fiber cloth. During the curing process of the resin glue on the glass fiber cloth, the pressurizer continuously pressurizes and supplies air to the air cavity of the repairer through the circulation pipe, and the heater continuously heats the gas in the circulation pipe to increase the gas temperature in the air cavity of the repairer, and the temperature in the air cavity is transmitted to the glass fiber cloth outside the air cavity, so that the curing temperature of the resin glue is increased, and the curing speed is effectively improved; and the switch of the heater can control the gas temperature in the circulation pipe, so that the resin glue on the glass fiber cloth is kept at a suitable temperature to complete the curing, improve the curing effect, and ensure that the glass fiber cloth is closely attached to the inner wall of the pipe of the section to be repaired, thereby improving the repair effect.

[0036] In one embodiment, step S50 includes:

[0037] S51: Spreading the glass fiber cloth, and applying the resin glue on the upper surface of the glass fiber cloth using a scraper;

[0038] S52: folding one side of the glass fiber cloth inward by one third along the length direction thereof, so that the upper surface of the folded glass fiber cloth forms a first folding surface;

[0039] S53: using the scraper to scrape the resin glue on the first folding surface;

[0040] S54: folding the glass fiber cloth inward by one third along the other side of the length direction thereof, so that the upper surface of the folded glass fiber cloth forms a second folding surface;

[0041] S55: Use the scraper to scrape the resin glue on the second folding surface.

[0042] It should be noted that, by dividing the glass fiber cloth into three equal parts along its length direction, after applying resin glue on the upper surface of the glass fiber cloth, one side of the glass fiber cloth is folded toward the middle, and the portion of the middle part of the glass fiber cloth not coated with resin glue forms a first folding surface. After applying resin glue on the first folding surface, the other side of the glass fiber cloth is folded toward the middle, and the portion of the upper surface of the glass fiber cloth not coated with resin glue forms a second folding surface. Finally, resin glue is applied on the second folding surface to form a three-layer structure of the glass fiber cloth. Resin glue is applied between two adjacent layers of glass fiber cloth to ensure that the resin glue is in full contact with and well bonded to the glass fiber cloth, thereby making the glass fiber cloth have good material strength and durability.

[0043] In one embodiment, step S60 includes:

[0044] S61: Winding the glass fiber cloth on the repairer along the length direction of the second folding surface;

[0045] S62: Bind the glass fiber cloth to the repairer along both sides of the width direction of the second folding surface with thin iron wires.

[0046] Furthermore, according to the length direction of the folded glass fiber cloth, the glass fiber cloth is wound around the outside of the air cavity of the repairer so that the width direction of the folded glass fiber cloth is consistent with the moving direction of the repairer, and then the glass fiber cloth is tied on both sides along the width direction to fix the glass fiber cloth on the repairer, so that the glass fiber cloth remains fixed relative to the repairer and remains fixed during the curing process of the resin glue, thereby ensuring the repair accuracy.

[0047] In one embodiment, step S30 includes:

[0048] S31: Pulling a traction rope between two inspection wells located at the inlet and outlet of the section to be repaired;

[0049] S32: Connecting a crawling robot equipped with a high-definition camera to the traction rope;

[0050] S33: When the crawling robot detects the position to be repaired, the position is marked on the traction rope.

[0051] It should be noted that the section to be repaired is divided according to the position of the inspection well. The inlet and outlet of the section to be repaired are respectively located in two inspection wells. The two inspection wells can be used to transfer materials from the section to be repaired to the ground. The traction rope is tied between the two inspection wells, passed through the section to be repaired, and two pulleys are respectively set at both ends of the traction rope so that the traction rope can move in the section to be repaired. By connecting the crawling robot to the traction rope, the crawling robot drives the traction rope to move together when crawling in the section to be repaired. When the crawling robot determines the position to be repaired, it marks the position on the traction rope, so that the position to be repaired is determined by the mark on the traction rope, which is convenient for the subsequent positioning of the repairer.

[0052] In one embodiment, step S70 includes:

[0053] S71: Connecting the repair device to the traction rope;

[0054] S72: Use the traction rope to drag the repairer to the marked position to drive the fiberglass cloth to move to the position to be repaired.

[0055] Furthermore, by connecting the repairer to the traction rope and driving the traction rope to move, the traction rope drags the repairer to move in the section to be repaired, and the marked position on the traction rope positions the repairer to ensure that the fiberglass cloth on the repairer is aligned with the position to be repaired.

[0056] In one embodiment, step S20: comprises:

[0057] S21: sucking and discharging the sewage in the section to be repaired;

[0058] S22: injecting clean water into the section to be repaired and stirring to dilute the sludge in the section to be repaired into slurry;

[0059] S23: sucking and discharging the mud at the inspection well at the outlet of the section to be repaired;

[0060] S24: performing high pressure washing on the section to be repaired;

[0061] S25: Cleaning the solid residues in the section to be repaired.

[0062] It should be noted that due to the high sludge content in the sewage, a large amount of sludge is deposited at the bottom of the section to be repaired after the sewage in the section to be repaired is pumped out. The sludge is diluted into slurry by injecting clean water, so that the precipitated sludge is sucked out of the underground sewage pipe together with the slurry. The section to be repaired is then flushed with high pressure, and the mud and dirt remaining on the inner wall of the section to be repaired are washed away by the high-pressure flushing force, and discharged out of the section to be repaired with the water flow to clean the pollutants with smaller weight or volume in the section to be repaired. For solid pollutants with larger weight or volume, construction personnel or machinery are required to enter the section to be repaired for cleaning, and multiple cleaning methods are used to clean them one by one, so that the cleaning is more thorough, ensuring that the inner wall of the section to be repaired remains clean for subsequent repair operations.

[0063] In one embodiment, step S24 includes:

[0064] S241: installing a high-pressure dredging vehicle at the inspection well located at the entrance of the section to be repaired;

[0065] S242: installing a sewage suction truck at the inspection well located at the exit of the section to be repaired;

[0066] S243: The section to be repaired is subjected to high-pressure flushing by the high-pressure dredging vehicle, and the section to be repaired is subjected to suction by the sewage suction vehicle.

[0067] Furthermore, by installing a high-pressure dredging vehicle at the upstream inspection well of the section to be repaired and a sewage suction truck at the downstream inspection well, the high-pressure water flow generated by the high-pressure dredging vehicle is used to flush the section to be repaired to remove stubborn dirt and sediment on the inner wall of the pipeline. The high-pressure dredging vehicle can provide a strong water flow to effectively peel off and flush away the blockages in the pipeline; the sewage and debris generated after high-pressure flushing are sucked out of the section to be repaired by the sewage suction truck to keep the pipeline unobstructed. The sewage suction truck has a strong suction force and can quickly remove liquid and solid waste in the pipeline. The combined operation of high-pressure flushing and sewage suction can quickly remove stubborn dirt in the pipeline, effectively improve the clearing effect, ensure the cleanliness of the pipeline, and the mechanized operation reduces the time personnel are exposed to harmful environments and dangerous conditions, improves the safety of the operation, and improves the efficiency of the clearing operation.

[0068] In one embodiment, step S25 includes:

[0069] S251: grinding the hardened cement slurry in the section to be repaired by a grinding robot;

[0070] S252: cutting the tree roots in the section to be repaired by a chain cutter;

[0071] S253: The solid residue in the section to be repaired is lifted from the inspection well to the outside of the inspection well.

[0072] It should be noted that high-pressure flushing of the section to be repaired is suitable for pollutants with smaller weight or volume, while for solid residues of cement slurry with larger weight or volume, which are tightly adhered to the inner wall of the section to be repaired and have been hardened, a grinding robot is used to grind the hardened cement slurry in the section to be repaired, and a chain cutter is used to cut the tree roots in the section to be repaired, so as to reduce the volume of the hardened cement slurry and tree roots, so as to facilitate the lifting of the solid residues to the outside of the section to be repaired through the inspection well, and more thoroughly remove the solid residues in the pipeline to improve the quality of clearing. Using automated equipment for grinding and cutting can greatly increase the speed of clearing operations and reduce the time and labor intensity of manual operations.

[0073] In one embodiment, step S10 includes:

[0074] S11: blocking the outlet of the pipeline located upstream of the section to be repaired;

[0075] S12: blocking the inlet of the pipeline downstream of the section to be repaired.

[0076] It should be noted that the section to be repaired is divided according to the location of the inspection wells in the underground sewage pipe. The inlet and outlet of the section to be repaired are located in two inspection wells respectively. The pipeline located upstream of the section to be repaired shares the same inspection well with the section to be repaired, and the outlet of the pipeline located upstream of the section to be repaired and the inlet of the section to be repaired are located in the same inspection well, and the inlet of the pipeline located downstream of the section to be repaired and the outlet of the section to be repaired are located in the same inspection well. By blocking the outlet of the pipeline located upstream of the section to be repaired and the inlet of the pipeline located downstream of the section to be repaired, the section to be repaired and the two inspection wells are isolated from the underground sewage pipe, thereby facilitating subsequent repair construction.

[0077] In one embodiment, step S11 includes:

[0078] S111: installing a baffle at the outlet of the pipeline upstream of the section to be repaired;

[0079] S112: using the baffle, setting a rubber airbag at the outlet of the pipeline located upstream of the section to be repaired;

[0080] S113: Inflate the rubber airbag until the baffle and the rubber airbag together block the outlet of the pipeline upstream of the section to be repaired.

[0081] Furthermore, when blocking the outlet of the pipeline located upstream of the section to be repaired, a baffle is installed at the outlet, the baffle is circumferentially arranged at the outlet, and the baffle is used as a supporting structure. A rubber airbag is arranged inside the baffle, and the rubber airbag is inflated to make the rubber airbag press against the baffle, so that the outlet is blocked by the baffle and the rubber airbag. Similarly, the same structure is used to block the inlet of the pipeline located downstream of the section to be repaired. The rubber airbag is used in combination with the baffle as the blocking structure. The rubber airbag is simple to operate and quick to construct, and can adapt to pipelines of different shapes and sizes, effectively improving the tightness of the blocking.

[0082] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for repairing underground sewage pipes by resin curing, characterized in that: Includes steps: Blocking the upstream and downstream of the section to be repaired in the underground sewage pipe; Cleaning the section to be repaired; Determining a position to be repaired within the section to be repaired; The resin and the curing agent are mixed in a preset ratio to form a resin glue; Applying the resin glue on the glass fiber cloth; Winding the fiberglass cloth onto a repairer; Dragging the repairer to drive the glass fiber cloth to move to the position to be repaired; Connecting the two ends of the air cavity of the repairer to the two ends of a circulation pipe respectively, and connecting the pressurizer and the heater to the circulation pipe in sequence; Using the pressurizer to pressurize the air cavity, and using the heater to heat the gas in the circulation pipe, so that the glass fiber cloth on the repairer fits with the inner wall of the pipe; After the resin glue is solidified, the pressurizer and the heater are removed to deflate the air cavity and separate the repair device from the inner wall of the pipeline.

2. The resin curing and repairing method for underground sewage pipes according to claim 1, characterized in that: The step of applying the resin glue on the glass fiber cloth comprises: Spreading the glass fiber cloth, and applying the resin glue on the upper surface of the glass fiber cloth using a scraper; Folding the glass fiber cloth inward by one third along one side of its length direction, so that the upper surface of the folded glass fiber cloth forms a first folding surface; Using the scraper to scrape the resin glue on the first folding surface; Folding the glass fiber cloth inward by one third along the other side of the length direction thereof, so that the upper surface of the folded glass fiber cloth forms a second folding surface; The resin glue is applied on the second folded surface by using the scraper.

3. The resin curing and repairing method for underground sewage pipes according to claim 2, characterized in that: The step of winding the glass fiber cloth onto the repairer comprises: Winding the glass fiber cloth on the repairer along the length direction of the second folded surface; The glass fiber cloth is tied to the repairer with thin iron wires at both sides along the width direction of the second folding surface.

4. The resin curing and repairing method for underground sewage pipes according to claim 1, characterized in that: The step of determining the position to be repaired within the section to be repaired comprises: Pulling a traction rope between two inspection wells located at the entrance and exit of the section to be repaired; A crawling robot equipped with a high-definition camera is connected to the traction rope; When the crawling robot detects the position to be repaired, the position is marked on the traction rope.

5. The resin curing and repairing method for underground sewage pipes according to claim 4, characterized in that: The step of dragging the repairer to drive the glass fiber cloth to move to the position to be repaired includes: Connecting the repair device to the traction rope; The repairer is dragged to the marked position by using the traction rope to drive the glass fiber cloth to move to the position to be repaired.

6. The resin curing and repairing method for underground sewage pipes according to any one of claims 1 to 5, characterized in that: The step of cleaning the section to be repaired comprises: Suctioning and discharging sewage in the section to be repaired; Injecting clean water into the section to be repaired and stirring to dilute the sludge in the section to be repaired into slurry; Sucking and discharging the mud at the inspection well at the outlet of the section to be repaired; Performing high-pressure flushing on the section to be repaired; Clean the solid residues in the section to be repaired.

7. The resin curing and repairing method for underground sewage pipes according to claim 6, characterized in that: The step of high-pressure flushing the section to be repaired comprises: A high-pressure dredging vehicle is provided at the inspection well located at the entrance of the section to be repaired; A sewage suction truck is provided at the inspection well located at the exit of the section to be repaired; The section to be repaired is flushed with high pressure by the high-pressure dredging vehicle, and the section to be repaired is sucked by the sewage suction vehicle.

8. The resin curing and repairing method for underground sewage pipes according to claim 6, characterized in that: The step of cleaning the solid residue in the section to be repaired comprises: Grinding the hardened cement slurry in the section to be repaired by a grinding robot; Cutting the tree roots in the section to be repaired by a chain cutter; The solid residue in the section to be repaired is lifted and transported to the outside of the inspection well through the inspection well.

9. The resin curing and repairing method for underground sewage pipes according to any one of claims 1 to 5, characterized in that: The step of blocking the upstream and downstream of the section to be repaired in the underground sewage pipe comprises: Blocking the outlet of the pipeline located upstream of the section to be repaired; The inlet of the pipeline downstream of the section to be repaired is blocked.

10. The resin curing and repairing method for underground sewage pipes according to claim 9, characterized in that: The step of blocking the outlet of the pipeline upstream of the section to be repaired comprises: A baffle is provided at the outlet of the pipeline located upstream of the section to be repaired; Using the baffle, a rubber air bag is arranged at the outlet of the pipeline located upstream of the section to be repaired; Inflate the rubber airbag until the baffle and the rubber airbag together block the outlet of the pipeline located upstream of the section to be repaired.

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