A local non-excavation pipeline repair and reinforcement system and construction method

Abstract

The invention discloses a pipeline local non-excavation repair and reinforcement system and a construction method. The system comprises a repair device and repair materials connected to the repair device; the repair device comprises an operating vehicle, an automatic cutting unit, a pipeline detection unit, a hot air pressurized conveying unit and a display unit arranged on the ground; the automatic cutting unit comprises a controller, an adjustable cutter control rod, an adjustable cutter, an adjustable flower tube arranged at the center of the repair material and plugs arranged at both ends of the repair material; the pipeline detection unit detects and locates the damaged position and condition of the pipeline, controls the operating vehicle to move forward in the pipeline and transports the repair materials to the damaged part of the pipeline; the hot air pressurized conveying unit pressurizes and expands the repair materials and tightly combines them with the inner wall of the pipeline; the controller controls the telescopic rotation of the adjustable cutter control rod, controls the cutting surface of the adjustable cutter and controls the telescopic extension of the adjustable flower tube to jointly cut the plugs at both ends of the repair material, thereby realizing non-excavation repair of the damaged underground drainage pipeline.

Description

Technical Field

[0001] The present invention belongs to the technical field of trenchless repair of urban underground pipelines, and more specifically, relates to a pipeline local trenchless repair reinforcement system and a construction method. Background Art

[0002] With the continuous expansion of urban construction, the urban underground pipe network system is becoming more and more complex and buried deeper. Urban pipelines are one of the important infrastructures that support social development and ensure people's lives. Pipeline maintenance is a necessary means to ensure its normal mechanism and function. In the process of urban construction, it is inevitable that underground pipelines will be damaged; due to the particularity of urban underground pipelines and the complexity of the ground environment, when underground drainage pipelines are damaged, the pipeline repair work is mainly carried out through two repair methods: excavation repair and non-excavation repair.

[0003] Traditional municipal construction often adopts excavation repair or replacement. Such construction methods often affect citizens' travel. At the same time, the construction period is long, and the investment of manpower, material resources, financial resources, etc. will increase. It is becoming less and less practical, and it is cumbersome, complicated, and destructive. Trenchless repair is a low-impact and low-maintenance repair method for infrastructure that has gradually received attention. At present, among the existing trenchless repair methods for pipelines: Patent CN201922020065.3 discloses the use of inflating an annular airbag to make the outer ring wall of the annular airbag fit tightly with the pipe wall of the pipeline, and then injecting the repair material from the grouting hole into the defective position of the pipeline; However, only one crack can be repaired at a time, the operation is complicated, the grouting surplus affects the water flow, and the pipeline is not reinforced; Patent CN202110524470.8 discloses the use of epoxy resin to repair the pipeline. Although it can make the pipeline repair more convenient and can effectively save the repair cost, the operation is complicated and there is no reinforcement effect on the damaged pipeline.

[0004] Therefore, there is an urgent need for a local non-excavation pipeline repair and reinforcement system and method that is easy to operate, safe and reliable, and the formed repair material will not hinder the flow of water in the pipeline and can reinforce the damaged part of the pipeline. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a pipeline local non-excavation repair and reinforcement system and construction method, wherein the pipeline detection unit detects and locates the damaged position and condition of the pipeline material and displays it on the display unit, determines the length of the repair material according to the length of the damaged pipeline, controls the operating vehicle to advance in the pipeline according to the detection and positioning result of the pipeline detection unit, and transports the repair material to the damaged part of the pipeline; controls the retractable fixing rod by the controller to fix the operating vehicle on the inner wall of the pipeline; conveys hot air to the repair material by the hot air pressurization conveying unit, so that the repair material is pressurized and expanded and tightly combined with the inner wall of the pipeline, and after the pressure is stabilized, cold air is input to make the repair material The sealing material is cooled and shaped; the controller controls the adjustable cutter control lever and the adjustable cutter to cut the plugs on both sides of the repair material according to the inner wall of the pipe, ensuring that the repair material after forming will not hinder the water flow in the pipe, and realizes the trenchless repair of the damaged underground drainage pipe; it is easy to operate, safe and reliable, the repair material after forming will not hinder the water flow in the pipe and can play a reinforcing role on the damaged part of the pipe, which can solve the problems of traditional pipeline repair by excavation repair or replacement, affecting citizens' travel, long construction period, large investment of manpower, material resources and financial resources, and the existing trenchless repair method is complicated to operate, the grouting surplus affects the water flow, and has no reinforcement effect on the damaged part of the pipe.

[0006] In order to achieve the above-mentioned object, one aspect of the present invention provides a pipeline local trenchless repair and reinforcement system, comprising a repair device that can move freely inside the pipeline to be repaired and a repair material connected to the repair device; wherein,

[0007] The repair device includes an operating vehicle, an automatic cutting unit, a pipeline detection unit, a hot air pressurized conveying unit and a display unit arranged on the ground and connected to the pipeline detection unit; the automatic cutting unit includes a controller arranged at one end of the operating vehicle, an adjustable cutter control rod connected to the controller, an adjustable cutter connected to the adjustable cutter control rod, an adjustable flower tube penetrating the center of the repair material and plugs arranged at both ends of the repair material; the hot air pressurized conveying unit is connected to the adjustable flower tube; the operating vehicle is also provided with a retractable fixing rod connected to the controller for stabilizing the operating vehicle; the repair material can be softened at high temperature and can be closely connected with the inner wall of the pipeline under gas pressure. After cooling, the repair material can be shaped and support and reinforce the inner wall of the pipeline by its own strength;

[0008] The pipeline detection unit is used to detect and locate the damaged position and condition of the pipeline material, and then determine the length of the repair material. According to the detection and positioning result of the pipeline detection unit, the operating vehicle is controlled to move forward in the pipeline, and the repair material is transported to the damaged part of the pipeline; the hot air pressurized delivery unit is used to deliver hot air to the repair material, so that the repair material is pressurized and expanded and tightly combined with the inner wall of the pipeline; the controller is used to control the extension and rotation of the adjustable cutter control rod, the cutting surface of the adjustable cutter, and the extension and retraction of the adjustable flower tube, so as to jointly realize the cutting of the plugs at both ends of the repair material, and realize non-excavation repair of the damaged underground drainage pipeline.

[0009] Furthermore, the hot air pressurized delivery unit includes a ground pressure gas storage tank arranged on the ground, a rubber conduit connected to the ground pressure gas storage tank, and a steel conduit that sequentially passes through the interior of the operating vehicle and the interior of the adjustable cutter control rod.

[0010] Furthermore, one end of the steel conduit is connected to the rubber conduit through a connector, and the other end is connected to one end of the adjustable flower tube close to the controller; the adjustable flower tube is connected to the ground pressure gas tank through the rubber conduit and the steel conduit connected in sequence, so that the hot air pressure can smoothly reach the repair material; the rubber conduit and the steel conduit of different materials are effectively connected through the connector to ensure the overall tightness of the hot air pressurized transmission pipeline.

[0011] Furthermore, the rubber conduit is located at the rear end of the operating vehicle, and the repair material is located at the front end of the operating vehicle.

[0012] Furthermore, the adjustable cutter control rod can freely telescopically move along the central axis of the steel conduit under the control of the controller.

[0013] Furthermore, the centers of the operating vehicle, the controller, the adjustable cutter control rod and the adjustable cutter are collinear.

[0014] Another aspect of the present invention provides a method for local trenchless repair and reinforcement of a pipeline, comprising the following steps:

[0015] S1: Use the pipeline detection unit to detect the damaged part of the pipeline in advance and record it; determine the length of the repair material required based on the detected damaged length of the pipeline;

[0016] S2: Put the repair device and the repair material as a whole into the inspection well, assemble the repair device and the repair material in the inspection well, and put them into the pipeline to be repaired;

[0017] S3: The pipeline detection unit is used on the ground to display the situation inside the pipeline on the ground display unit, and the operating vehicle is controlled by the controller to move forward in the pipeline, and the pipeline detection unit is used to accurately locate and transport the repair material to the damaged part of the pipeline;

[0018] S4: Adjust the retractable fixing rod on the operating vehicle through the controller to fix the operating vehicle;

[0019] S5: Start the ground pressure gas storage tank, and transport the hot air in the ground pressure gas storage tank to the adjustable flower pipe through the rubber pipe and the steel pipe. The repair material is heated and expanded by the high temperature and air pressure to make it closely bonded with the inner wall of the pipeline;

[0020] S6: Keep the internal air pressure of the repair material unchanged, wait for the air pressure and temperature in the repair material to drop, and finally cool it to form and fix it, thus completing the repair and strengthening of the pipeline;

[0021] S7: The controller controls the adjustable cutter control rod and the adjustable cutter to cut off the plug at one end close to the adjustable cutter according to the diameter of the repaired pipe, and then controls the controller to shrink the adjustable flower tube and extend the adjustable cutter control rod to cut the plug at one end of the adjustable flower tube away from the adjustable cutter, ensuring that the formed repair material will not hinder the water flow in the pipe;

[0022] S8: The adjustable cutter control rod and the adjustable cutter are retracted through the controller, and the retractable fixing rod is retracted to move the repair device out of the pipeline into the inspection well, and it is taken out to complete the trenchless repair of the pipeline.

[0023] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0024] (1) The present invention provides a local non-excavation pipeline repair and reinforcement system. The pipeline detection unit detects and locates the location and condition of pipeline material damage and displays it on a display unit. The length of the repair material is determined according to the length of the damaged pipeline. The operating vehicle is controlled to move forward in the pipeline according to the detection and positioning result of the pipeline detection unit, and the repair material is transported to the damaged part of the pipeline, ensuring that ground operators can accurately and reliably complete the repair of the damaged part of the pipeline. The operation is convenient, safe and reliable. The hot air is transported to the repair material through the hot air pressurized delivery unit, and the thermal expansion of the repair material is cleverly used to make the repair material in close contact with the inner wall of the pipeline. After the pressure is stabilized, cold air is input to cool and shape the sealing material. At the same time, the strength of the repair material itself is used to reinforce the damaged part of the pipeline, ensuring that the damaged part is repaired densely and is not disturbed by running water or the outside world during the repair process. The adjustable flower pipe solves the problem of installing repair materials for pipelines with different damaged lengths.

[0025] (2) The present invention provides a local non-excavation pipeline repair and reinforcement system, which controls the adjustable cutter control rod and the adjustable cutter through a controller to cut the plugs on both sides of the repair material against the inner wall of the pipeline, ensuring that the formed repair material will not hinder the flow of water in the pipeline, thereby achieving non-excavation repair of damaged underground drainage pipelines.

[0026] (3) The trenchless repair and reinforcement system for local pipelines of the present invention controls the extension and retraction of the retractable fixing rod on the operating vehicle through a controller, so that the repair device can be freely transported in the pipeline and can also be firmly stopped at a certain location without being moved by external forces or flowing water.

[0027] (4) The present invention provides a local non-excavation pipeline repair and reinforcement system, which effectively saves construction costs by providing an adjustable flower tube on the repair material and providing reusable plugs at both ends of the adjustable flower tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of a pipeline local trenchless repair and reinforcement system according to an embodiment of the present invention;

[0029] Figure 2 The present invention is a schematic diagram of a process flow of a method for trenchless repair and reinforcement of a local pipeline according to an embodiment of the present invention.

[0030] In all the drawings, the same figure numbers represent the same technical features, specifically: 1-operating vehicle, 2-automatic cutting unit, 21-controller, 22-adjustable cutter control lever, 23-adjustable cutter, 24-adjustable flower pipe, 25-plug, 3-pipeline detection unit, 4-hot air pressurized delivery unit, 41-ground pressure gas storage tank, 42-rubber conduit, 43-steel conduit, 44-connector, 5-repair material, 6-display unit. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, when an element is referred to as being "fixed to", "disposed on" or "provided on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element; the terms "installed", "connected", "connected" and "provided with" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] like Figure 1As shown, one aspect of the present invention provides a pipeline local non-excavation repair and reinforcement system, comprising a repair device that can move freely inside the pipeline to be repaired and a repair material 5 connected to the repair device; the repair device comprises an operating vehicle 1, an automatic cutting unit 2, a pipeline detection unit 3, a hot air pressurization conveying unit 4 and a display unit 6 arranged on the ground and connected to the pipeline detection unit 3, the repair material 5 is connected to the automatic cutting unit 2 and the hot air pressurization conveying unit 4; the automatic cutting unit 2 comprises a controller 21 arranged at one end of the operating vehicle 1, and a display unit 6 arranged on the ground and connected to the pipeline detection unit 3. The adjustable cutter control rod 22 connected to the controller 21 and the adjustable cutter 23 connected to the adjustable cutter control rod 22, the adjustable flower tube 24 penetrating the center of the repair material 5 and the plugs 25 arranged at both ends of the repair material 5; the adjustable flower tube 24 is an important connecting channel for the two plugs at both ends of the repair material 5; the plugs 25 are used to ensure the sealing inside the repair material 5; the operating vehicle 1 is also provided with a retractable fixing rod 11 connected to the controller 21. After the operating vehicle 1 determines the pipeline repair position, the fixing rod is raised to ensure that the operating vehicle is stable and is not affected by the flow of water in the pipeline. The present invention uses the pipe The pipeline detection unit 3 detects and locates the damaged position and condition of the pipeline material and displays it on the display unit 6. The length of the repair material 5 is determined according to the length of the damaged pipeline. The operating vehicle 1 is controlled to move forward in the pipeline according to the detection and positioning result of the pipeline detection unit 3, and the repair material 5 is transported to the damaged part of the pipeline; the controller 21 controls the retractable fixing rod 11 to fix the operating vehicle 1 on the inner wall of the pipeline; the hot air pressurized conveying unit 4 conveys hot air to the repair material 5, so that the repair material 5 is pressurized and expanded and tightly combined with the inner wall of the pipeline; the controller 21 controls the adjustable cutter control rod 22 and the adjustable cutter 23 to pressurize the repair material 5 according to the repair material 5. The pipe diameter will be cut off from the plug at one end close to the adjustable cutter, and then the plug on the other side of the repair material 5 will be cut off by controlling the contraction of the adjustable flower tube 24 and the extension of the adjustable cutter control rod, so as to realize the trenchless repair of the damaged underground drainage pipe; it is easy to operate, safe and reliable, and the formed repair material will not hinder the flow of water in the pipe and can reinforce the damaged part of the pipe. It can solve the problems of traditional pipe repair by excavation repair or replacement, affecting citizens' travel, long construction period, large investment of manpower, material and financial resources, and the existing trenchless repair method is complicated to operate, the grouting surplus affects the water flow, and has no reinforcement effect on the damaged part of the pipe.

[0034] Furthermore, if Figure 1As shown, the centers of the operating vehicle 1, the controller 21, the adjustable cutter control rod 22 and the adjustable cutter 23 are collinear; the adjustable cutter control rod 22 can freely extend and retract along the central axis of the steel conduit 43 under the control of the controller 21; the adjustable cutter 23 is used to cut the plugging part of the repaired pipe after the repair material is completed, ensuring that the two ends of the repair material 5 are flush with the inner wall of the pipe and do not affect the subsequent drainage of the pipeline; the adjustable cutter 23 can adjust the length of the cutter under the control of the controller 21, thereby adjusting the size of the cutting surface; the controller 21 controls the extension and rotation of the adjustable cutter control rod 22, controls the length of the adjustable cutter 23, and controls the extension and retraction of the adjustable flower tube 24, so as to jointly realize the cutting of the plugs at both ends of the repair material 5.

[0035] Furthermore, if Figure 1 As shown, the hot air pressurized delivery unit 4 includes a ground pressure gas storage tank 41 arranged on the ground, a rubber conduit 42 connected to the ground pressure gas storage tank 41, and a steel conduit 43 that sequentially passes through the interior of the operating vehicle 1 and the interior of the adjustable cutter control rod 22; one end of the steel conduit 43 is connected to the rubber conduit 42 through a connector 44, and the other end is connected to an end of the adjustable flower tube 24 close to the controller 21; the present invention connects the adjustable flower tube 24 with the ground pressure gas storage tank 41 through the rubber conduit 42 and the steel conduit 43 that are connected in sequence, so that the hot air pressure can smoothly reach the repair material 5; the rubber conduit 42 and the steel conduit 43 of different materials are effectively connected through the connector 44 to ensure the tightness of the hot air pressurized delivery pipeline as a whole.

[0036] Furthermore, if Figure 1 As shown, the retractable fixing rod 11 is used to lift the fixing rod after determining the repair position, so as to ensure that the operating vehicle is stable and not moved by the influence of running water; the rubber tube 42 is located at the rear end of the operating vehicle 1, and the repair material 5 is located at the front end of the operating vehicle 1; the repair material 5 can be softened at high temperature and can be in close contact with the inner wall of the pipeline under gas pressure to ensure seamless connection. At the same time, after the repair material is cooled, it can be shaped and have a certain strength to support and reinforce the inner wall of the pipeline.

[0037] like Figure 2 As shown, another aspect of the present invention provides a method for local trenchless repair and reinforcement of a pipeline, comprising the following steps:

[0038] S1: Use the pipeline detection unit to detect the damaged part of the pipeline in advance and record it; determine the length of the repair material required based on the detected damaged length of the pipeline;

[0039] S2: Put the repair device and the repair material as a whole into the inspection well, assemble the repair device and the repair material in the inspection well, and put them into the pipeline to be repaired;

[0040] S3: The pipeline detection unit is used on the ground to display the situation inside the pipeline on the ground display unit, and the operating vehicle is controlled by the controller to move forward in the pipeline, and the pipeline detection unit is used to accurately locate and transport the repair material to the damaged part of the pipeline;

[0041] S4: Adjust the retractable fixing rod on the operating vehicle through the controller to fix the operating vehicle;

[0042] S5: Start the ground pressure gas storage tank, and transport the hot air in the ground pressure gas storage tank to the adjustable flower pipe through the rubber pipe and the steel pipe. The repair material is heated and expanded by the high temperature and air pressure to make it closely bonded with the inner wall of the pipeline;

[0043] S6: Keep the internal air pressure of the repair material unchanged, wait for the air pressure and temperature in the repair material to drop, and finally cool it to form and fix it, thus completing the repair and strengthening of the pipeline;

[0044] S7: The controller controls the adjustable cutter control rod and the adjustable cutter to cut off the plug at one end close to the adjustable cutter according to the diameter of the repaired pipe, and then controls the controller to shrink the adjustable flower tube and extend the adjustable cutter control rod to cut the plug at one end of the adjustable flower tube away from the adjustable cutter, ensuring that the formed repair material will not hinder the water flow in the pipe;

[0045] S8: The adjustable cutter control rod and the adjustable cutter are retracted through the controller, and the retractable fixing rod is retracted to move the repair device out of the pipeline into the inspection well, and it is taken out to complete the trenchless repair of the pipeline.

[0046] The working principle of a pipeline local trenchless repair and reinforcement system and method provided by the present invention is as follows: a pipeline detection unit is used to detect pipeline damage data in advance, and the length of the repair material is selected according to the pipeline damage degree and length displayed by the pipeline damage data; the repair device is placed in the pipeline, and the ground operator can determine the accuracy of the placement of the repair material according to the pipeline detection unit, and then the ground pressure gas storage tank is started, and the hot air in the ground pressure gas storage tank is transported to the adjustable flower tube through the rubber tube and the steel tube, and then transported to the sealed repair material. Due to the increase in air pressure and temperature, the repair material is softened, and at the same time, the repair material is tightly attached to the inner wall of the existing pipeline. After the pressure is stabilized, cold air can be input to cool the sealing material and fix it; secondly The controller controls the adjustable cutter control lever and the adjustable cutter to cut the plugs on both sides of the repair material according to the inner wall of the pipeline, ensuring that the formed repair material will not hinder the water flow in the pipeline; finally, the repair device is moved out of the pipeline into the inspection well and taken out to complete the non-excavation repair of the pipeline; this method can also be operated with water and is not affected by the flowing water; it is easy to operate, safe and reliable, the formed repair material will not hinder the water flow in the pipeline and can reinforce the damaged part of the pipeline, and can solve the problems of traditional pipeline repair by excavation repair or replacement, affecting citizens' travel, long construction period, large investment in manpower, material resources and financial resources, and the existing non-excavation repair method is complicated to operate, the grouting surplus affects the water flow, and has no reinforcement effect on the damaged part of the pipeline.

[0047] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipeline local trenchless repair and reinforcement system, characterized by: It comprises a repair device capable of moving freely inside the pipeline to be repaired and a repair material (5) connected to the repair device; wherein: The repair device comprises an operating vehicle (1), an automatic cutting unit (2) arranged on the operating vehicle (1), a pipeline detection unit (3), a hot air pressurized conveying unit (4), and a display unit (6) arranged on the ground and connected to the pipeline detection unit (3); the automatic cutting unit (2) comprises a controller (21) arranged at one end of the operating vehicle (1), an adjustable cutter control rod (22) connected to the controller (21), an adjustable cutter (23) connected to the adjustable cutter control rod (22), an adjustable flower tube (23) penetrating the center of the repair material (5), and a display unit (6) arranged on the ground and connected to the pipeline detection unit (3). 4) and plugs (25) provided at both ends of the repair material (5); the hot gas pressurized delivery unit (4) is connected to the adjustable flower tube (24); the operating vehicle (1) is also provided with a retractable fixing rod (11) connected to the controller (21) for stabilizing the operating vehicle; the repair material (5) can be softened at high temperature and can be closely connected with the inner wall of the pipeline under gas pressure; the repair material (5) can be shaped after cooling and support and reinforce the inner wall of the pipeline through its own strength; the installation of repair materials (5) with different damage lengths of pipelines is solved by the adjustable flower tube (24); The pipeline detection unit (3) detects and locates the position and condition of pipeline material damage, controls the operating vehicle (1) to move forward in the pipeline, and transports the repair material (5) to the damaged part of the pipeline; the hot air pressurized delivery unit (4) delivers hot air to the repair material (5), so that the repair material (5) is pressurized and expanded and tightly combined with the inner wall of the pipeline; the controller (21) controls the extension and rotation of the adjustable cutter control rod (22), controls the cutting surface of the adjustable cutter (23), and controls the extension and retraction of the adjustable flower tube (24), so as to jointly realize the cutting of the plugs at the two ends of the repair material (5), ensure that the repair material after forming will not hinder the water flow in the pipeline, and realize the trenchless repair of the damaged underground drainage pipeline.

2. A pipeline local trenchless repair and reinforcement system according to claim 1, characterized in that: The hot gas pressurized delivery unit (4) comprises a ground pressure gas storage tank (41) arranged on the ground, a rubber conduit (42) connected to the ground pressure gas storage tank (41), and a steel conduit (43) which sequentially passes through the interior of the operating vehicle (1) and the interior of the adjustable cutter control rod (22).

3. A pipeline local trenchless repair and reinforcement system according to claim 2, characterized in that: One end of the steel conduit (43) is connected to the rubber conduit (42) via a connector (44), and the other end is connected to one end of the adjustable flower tube (24) close to the controller (21); the adjustable flower tube (24) is connected to the ground pressure gas storage tank (41) through the rubber conduit (42) and the steel conduit (43) connected in sequence, so that the hot air pressure can smoothly reach the repair material (5); the rubber conduit (42) and the steel conduit (43) made of different materials are effectively connected through the connector (44), ensuring the tightness of the hot air pressurized transmission pipeline as a whole.

4. A pipeline local trenchless repair and reinforcement system according to claim 3, characterized in that: The rubber conduit (42) is located at the rear end of the operating vehicle (1), and the repair material (5) is located at the front end of the operating vehicle (1).

5. A pipeline local trenchless repair and reinforcement system according to claim 4, characterized in that: The adjustable cutter control rod (22) can freely telescopically move along the central axis of the steel guide tube (43) under the control of the controller (21).

6. A pipeline local trenchless repair and reinforcement system according to any one of claims 1 to 5, characterized in that: The centers of the operating vehicle (1), the controller (21), the adjustable cutter control rod (22) and the adjustable cutter (23) are collinear.

7. A method for local trenchless repair and reinforcement of pipelines, characterized in that: The method of using a pipeline local trenchless repair and reinforcement system as described in any one of claims 1 to 6 comprises the following steps: S1: Use the pipeline detection unit to detect the damaged part of the pipeline in advance and record it; determine the length of the repair material required based on the detected damaged length of the pipeline; S2: Put the repair device and the repair material as a whole into the inspection well, assemble the repair device and the repair material in the inspection well, and put them into the pipeline to be repaired; S3: The pipeline detection unit is used on the ground to display the situation inside the pipeline on the ground display unit, and the operating vehicle is controlled by the controller to move forward in the pipeline, and the pipeline detection unit is used to accurately locate and transport the repair material to the damaged part of the pipeline; S4: Adjust the retractable fixing rod on the operating vehicle through the controller to fix the operating vehicle; S5: Start the ground pressure gas storage tank, and transport the hot air in the ground pressure gas storage tank to the adjustable flower pipe through the rubber pipe and the steel pipe. The repair material is heated and expanded by the high temperature and air pressure to make it closely bonded with the inner wall of the pipeline; S6: Keep the internal air pressure of the repair material unchanged, wait for the air pressure and temperature in the repair material to drop, and finally cool it to form and fix it, thus completing the repair and strengthening of the pipeline; S7: The controller controls the adjustable cutter control rod and the adjustable cutter to cut off the plug at one end close to the adjustable cutter according to the diameter of the repaired pipe, and then controls the controller to shrink the adjustable flower tube and extend the adjustable cutter control rod to cut the plug at one end of the adjustable flower tube away from the adjustable cutter, ensuring that the formed repair material will not hinder the water flow in the pipe; S8: The adjustable cutter control rod and the adjustable cutter are retracted through the controller, and the retractable fixing rod is retracted to move the repair device out of the pipeline into the inspection well, and it is taken out to complete the trenchless repair of the pipeline.

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