A trenchless repair device and repair method for municipal pipelines

Abstract

The present invention belongs to the technical field of pipeline repair, and specifically relates to a trenchless repair device and method for municipal pipelines, including a mobile frame. A set of remote control wheels are arranged inside the mobile frame, and the remote control wheels are controlled by remote control equipment. A set of limiting rods are fixedly installed on the inner surface of the mobile frame, and the other ends of the limiting rods are fixedly installed with motors. An output shaft is arranged inside the motors. A repair pipe is fixedly installed on the surface of the output shaft. When the motor is started, the output shaft of the motor rotates and drives the repair pipe filled with repair glue to rotate. The centrifugal force generated when the repair pipe rotates drives the piston block to move and stretch the spring. When the piston block moves, the repair glue is extruded. The extruded repair glue will enter the gap between the pipeline and the pipeline to complete the repair and prevent the pipeline from leaking during subsequent use. Since the repair is carried out inside the pipeline, the fluid inside the pipeline is not likely to wash away the repair material when flowing.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline repair, and specifically relates to a trenchless repair device and method for municipal pipelines. Background Art

[0002] A pipeline is a device connected by pipes, pipe connectors, valves, etc. for transporting gases, liquids, or fluids with solid particles. Usually, after the fluid is pressurized by a blower, compressor, pump, boiler, etc., it flows from the high-pressure part of the pipeline to the low-pressure part, or it can also be transported by the pressure or gravity of the fluid itself. After long-term use, the pipeline will malfunction, and a pipeline repair device is a device for repairing the pipeline.

[0003] A patent of Chinese Patent Application CN115013633A discloses a trenchless pipeline repair device without going down into the well. The key points of its technical solution are: including a support device, a propulsion device slidably arranged on the support device, a fixing component, and a locking component. Matching internal and external threads are provided at both the head and tail ends of the repair pipe. The fixing component includes a fixing collar and a fixing half-ring and a movable half-ring arranged inside the fixing collar to achieve the fixation of the repair pipe; the locking component includes a locking rod and a locking chain. A locking groove matching the locking chain is also provided at one end of the locking rod to achieve the locking of the repair pipe, and thus the head and tail assembly of two repair pipes is realized. The present invention can realize the lowering and propulsion of the repair pipe through the assembly of the repair pipe and the propulsion device and the propulsion device and the lifting frame, avoiding the situation of personnel going down into the well; by using the repair pipe with internal and external threads and this repair device, the threaded fixation between the repair pipes is realized, increasing the sealing performance between the repair pipes and improving the working efficiency of pipeline repair.

[0004] Regarding the above and existing related technologies, the inventor believes that the following defects often exist: After long-term use at the connection between pipelines, gaps will appear between the pipelines, and most pipeline repair devices repair on the outer surface of the pipeline. The fluid pressure inside the pipeline is likely to wash away the repair material floating on the surface, so the pipeline still cannot be used normally.

[0005] Therefore, the present invention provides a trenchless repair device and method for municipal pipelines. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A trenchless repair device for municipal pipelines described in the present invention includes a moving frame. Inside the moving frame, there is a set of remote control wheels, which are controlled by remote control equipment. On the inner surface of the moving frame, a set of limiting rods are fixedly installed. The other ends of the limiting rods are fixedly installed with motors. Inside the motors, there are output shafts. On the surface of the output shafts, repair pipes are fixedly installed. Inside the inner walls of the repair pipes, springs are fixedly installed. The other ends of the springs are fixedly installed with piston blocks. Inside the repair pipes, there is repair glue. After the pipelines are buried underground and used for a long time, the joints between the pipelines become loose and gaps appear. When repairing the pipelines, the whole device is placed inside the pipeline, and the remote control equipment is used to control the rotation of the remote control wheels to move the moving frame to the designated position. When the device moves to the position where repair is needed, the motor is started. The output shaft of the motor rotates and drives the repair pipe filled with repair glue to rotate. The centrifugal force generated during the rotation of the repair pipe drives the piston block to move and stretch the spring. When the piston block moves, the repair glue is extruded. The extruded repair glue will enter the gaps between the pipelines, completing the repair to prevent leakage in the subsequent use of the pipelines. Since the repair is carried out inside the pipeline, the fluid inside the pipeline is not likely to wash away the repair material during flow.

[0008] Preferably, on the surface of the moving frame, an installation frame is fixedly installed. On the surface of the installation frame, a collar is fixedly installed. Inside the inner wall of the collar, a limiting rod is slidably installed. On the inner surface of the installation frame, an airbag is fixedly installed. The installation frame has a hollow structure and is connected and communicated with the airbag. On the surface of the output shaft, an elastic arc plate is fixedly installed. On the surface of the elastic arc plate, an extrusion rod is fixedly installed. When repairing the pipeline, the output shaft rotates and drives the elastic arc plate to rotate. Affected by the centrifugal force, the elastic arc plate undergoes slight deformation and drives the extrusion rod to move away from the output shaft. When the extrusion rod moves, it abuts against the airbag. The gas inside the airbag enters the installation frame. The air pressure inside the installation frame increases and causes the limiting rod to move away from the collar and abut against the inner wall of the pipeline, fixing the moving frame inside the pipeline, thereby improving the stability of the device during pipeline repair and enhancing the repair efficiency.

[0009] Preferably, on the surface of the output shaft, an arc-shaped scraping plate is fixedly installed. The end of the arc-shaped scraping plate away from the output shaft is flat-shaped. The output shaft rotates counterclockwise. When repairing the gap between two pipelines, the output shaft first rotates at a lower speed to drive the arc-shaped scraping plate to rotate (when the output shaft rotates at a lower speed, the piston block cannot move due to centrifugal force, so the repair glue inside the repair pipe will not overflow). Due to the existence of centrifugal force when the arc-shaped scraping plate rotates, the end of the arc-shaped scraping plate away from the output shaft abuts against the inner wall of the pipeline, scraping off the sundries existing at the joint between the pipelines first. Subsequently, the rotation speed of the motor is adjusted to repair the pipeline gap, which can prevent impurities from mixing with the repair glue and affecting the repair effect of the repair glue.

[0010] Preferably, a set of symmetrically arranged baffles are fixedly installed on the surface of the arc-shaped scraper. A notch is formed on the surface of the arc-shaped scraper. A baffle plate is fixedly installed on the surface of the arc-shaped scraper. A collection bin is fixedly installed on the surface of the arc-shaped scraper. After the arc-shaped scraper scrapes impurities onto itself, the impurities gradually accumulate. The cooperation between the baffle and the baffle plate enables the continuously accumulating impurities to enter the notch. When the impurities enter the notch, they are collected by the collection bin, reducing the situation where the scraped impurities fall on the connection between the two pipes and affecting the effective repair of the subsequent repair glue.

[0011] Preferably, an arc-shaped plate is fixedly installed on the surface of the output shaft. A wiping block is fixedly installed on the inner wall of the arc-shaped plate. After the repair pipe sprays the glue at the repair location, the arc-shaped plate drives the wiping block to wipe the repair location, which can wipe and squeeze the glue into the gap at the repair location. At the same time, the glue is applied more evenly, improving the repair effect and preventing the glue from being unable to enter the gap.

[0012] Preferably, a pressing plate is rotatably installed on the inner wall of the arc-shaped plate. An elastic rope is fixedly installed on the surface of the pressing plate. The other end of the elastic rope is fixedly connected to the surface of the arc-shaped plate. A counterweight is fixedly installed on the surface of the arc-shaped plate. The wiping block is made of sponge. The sponge wiping block is easy to absorb glue and wipes faster. The elastic rope and the pressing plate cooperate with each other, making the wiping block always in a squeezed state. When the output shaft rotates, the counterweight is affected by the centrifugal force, causing the pressing plate to rotate and no longer squeeze the wiping block. At this time, the wiping block is in a natural fluffy state, with increased flexibility, facilitating the effect of the wiping block to spread the glue evenly. However, when the wiping block wipes the repair glue, some glue may enter the wiping block. When the rotation speed of the output shaft slows down, the elastic rope drives the pressing plate to reset and squeeze the wiping block again, squeezing out the glue in the wiping block, enabling the glue to be fully utilized and reducing the waste of glue.

[0013] Preferably, a support rod is fixedly installed on the surface of the moving frame. A connecting block is rotatably installed on the surface of the support rod. A sector plate is fixedly installed on the surface of the connecting block. When the moving frame moves into the pipe, when the sector plate encounters impurities such as silt, it will drive the connecting block to rotate along the support rod, facilitating the movement of the moving frame into the pipe interior. When the moving frame moves out of the pipe, the sector plate abuts against the moving frame, scraping the impurities accumulated at the lower part inside the pipe out of the pipe, achieving the effect of cleaning the inside of the pipe and reducing the probability of blockage inside the pipe.

[0014] Preferably, a groove is formed on the surface of the extrusion rod. A roller is rotatably installed on the inner wall of the groove. When the extrusion rod is about to contact the air bag, the roller abuts against the air bag. When the output shaft rotates, the roller rotates on the surface of the air bag, preventing the extrusion rod from directly contacting the air bag, reducing the friction between the extrusion rod and the air bag, and thus extending the service life of the air bag.

[0015] A trenchless repair method for municipal pipelines, which uses the above-mentioned trenchless repair equipment for municipal pipelines. The method includes the following steps:

[0016] S1: When repairing the pipeline, place the whole equipment inside the pipeline, and use the remote control equipment to control the rotation of the remote control wheel to move the moving frame to the designated position;

[0017] S2: When the equipment moves to the position where repair is needed, start the motor. The output shaft of the motor rotates and drives the repair pipe filled with repair glue to rotate;

[0018] S3: The centrifugal force generated when the repair pipe rotates drives the piston block to move and stretch the spring. When the piston block moves, the repair glue is extruded. The extruded repair glue will enter the gap between the pipelines to complete the repair.

[0019] A trenchless repair method for municipal pipelines, which also includes the following steps:

[0020] S4: When repairing, the output shaft rotates and drives the elastic arc plate to rotate. The elastic arc plate is slightly deformed under the influence of centrifugal force and drives the extrusion rod away from the output shaft;

[0021] S5: When the extrusion rod moves, it abuts against the air bag. The gas in the air bag enters the mounting frame, the air pressure in the mounting frame increases and makes the limiting rod move away from the collar and abut against the inner wall of the pipeline, fixing the moving frame inside the pipeline.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. For the trenchless repair equipment and repair method for municipal pipelines described in the present invention, after the pipelines are buried underground and used for a long time, the joints between the pipelines will become loose and gaps will appear. When repairing the pipelines, place the whole equipment inside the pipelines, and use the remote control equipment to control the rotation of the remote control wheel to move the moving frame to the designated position. When the equipment moves to the position where repair is needed, start the motor. The output shaft of the motor rotates and drives the repair pipe filled with repair glue to rotate. The centrifugal force generated when the repair pipe rotates drives the piston block to move and stretch the spring. When the piston block moves, the repair glue is extruded. The extruded repair glue will enter the gap between the pipelines to complete the repair, preventing the pipelines from leaking during subsequent use. Since the repair is carried out inside the pipelines, the fluid inside the pipelines is not likely to wash away the repair material when flowing.

[0024] 2. For a trenchless repair device and repair method of a municipal pipeline according to the present invention, when repairing the pipeline, the output shaft rotates and drives the elastic arc plate to rotate. The elastic arc plate is slightly deformed under the influence of centrifugal force and drives the extrusion rod away from the output shaft. When the extrusion rod moves, it abuts against the air bag, and the gas in the air bag enters the mounting frame. The air pressure in the mounting frame increases and causes the limiting rod to move away from the collar and abut against the inner wall of the pipeline, fixing the moving frame in the pipeline, thereby improving the stability of the device during pipeline repair and enhancing the repair efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 is a three-dimensional view of the overall device of the present invention;

[0027] Figure 2 is a cross-sectional view of the repair pipe in the present invention;

[0028] Figure 3 is a schematic structural diagram of the arc-shaped scraper in the present invention;

[0029] Figure 4 is a schematic structural diagram of the sector plate in the present invention;

[0030] Figure 5 is a schematic structural diagram of the arc plate in the present invention;

[0031] Figure 6 is a schematic structural diagram of the mounting frame in the present invention;

[0032] Figure 7 is a schematic structural diagram of the roller in Embodiment 2;

[0033] Figure 8 is a flowchart of the method of the present invention.

[0034] In the figure: 1, moving frame; 2, remote control wheel; 3, motor; 4, limiting rod; 5, output shaft; 6, repair pipe; 7, spring; 8, piston block; 9, elastic arc plate; 10, extrusion rod; 11, mounting frame; 12, air bag; 13, collar; 14, limiting rod; 15, arc-shaped scraper; 16, baffle; 17, baffle plate; 18, notch; 19, collection bin; 20, arc plate; 21, wiping block; 22, pressing plate; 23, counterweight; 24, elastic rope; 25, support rod; 26, connecting block; 27, sector plate; 28, roller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0036] Embodiment 1

[0037] As Figures 1 to 6 shown, a trenchless repair device for municipal pipelines according to an embodiment of the present invention includes a mobile frame 1. A set of remote control wheels 2 are arranged inside the mobile frame 1. The remote control wheels 2 are controlled by a remote control device. A set of limiting rods 4 are fixedly installed on the inner surface of the mobile frame 1. The other ends of the limiting rods 4 are fixedly installed with motors 3. An output shaft 5 is arranged inside the motors 3. A repair pipe 6 is fixedly installed on the surface of the output shaft 5. A spring 7 is fixedly installed on the inner wall of the repair pipe 6. The other end of the spring 7 is fixedly installed with a piston block 8. A repair adhesive is arranged inside the repair pipe 6. After the pipeline is buried underground and used for a long time, the connection between pipelines will become loose and gaps will appear. When repairing the pipeline, the whole device is placed inside the pipeline, and the remote control device is used to control the rotation of the remote control wheels 2 to move the mobile frame 1 to a specified position. When the device moves to the position where repair is needed, the motor 3 is started. The output shaft 5 of the motor 3 rotates and drives the repair pipe 6 filled with the repair adhesive to rotate. The centrifugal force generated when the repair pipe 6 rotates drives the piston block 8 to move and stretch the spring 7. When the piston block 8 moves, the repair adhesive is extruded. The extruded repair adhesive will enter the gaps between pipelines, completing the repair to prevent leakage of the pipeline during subsequent use. Since the repair is carried out inside the pipeline, the fluid inside the pipeline is not likely to wash away the repair material when flowing.

[0038] Wherein, an installation frame 11 is fixedly installed on the surface of the mobile frame 1. A collar 13 is fixedly installed on the surface of the installation frame 11. A limiting rod 14 is slidably installed on the inner wall of the collar 13. An air bag 12 is fixedly installed on the inner surface of the installation frame 11. The installation frame 11 has a hollow structure and is communicated with the air bag 12. An elastic arc plate 9 is fixedly installed on the surface of the output shaft 5. An extrusion rod 10 is fixedly installed on the surface of the elastic arc plate 9. When the repair pipe 6 rotates, the output shaft 5 rotates and drives the elastic arc plate 9 to rotate. The elastic arc plate 9 is slightly deformed under the influence of centrifugal force and drives the extrusion rod 10 to move away from the output shaft 5. When the extrusion rod 10 moves, it abuts against the air bag 12. The gas in the air bag 12 enters the installation frame 11. The air pressure in the installation frame 11 increases and makes the limiting rod 14 move away from the collar 13 and abut against the inner wall of the pipeline, fixing the mobile frame 1 inside the pipeline, thereby improving the stability of the device when repairing the pipeline and improving the repair efficiency.

[0039] Among them, an arc-shaped scraping plate 15 is fixedly installed on the surface of the output shaft 5. One end of the arc-shaped scraping plate 15 away from the output shaft 5 is flat. The output shaft 5 rotates counterclockwise. When repairing the gap between the two pipes, the output shaft 5 first rotates at a lower speed to drive the arc-shaped scraping plate 15 to rotate (when the rotation speed of the output shaft 5 is low, the piston block 8 cannot move due to centrifugal force, so the repair glue in the repair pipe 6 will not overflow). When the arc-shaped scraping plate 15 rotates, due to the existence of centrifugal force, the end of the arc-shaped scraping plate 15 away from the output shaft 5 abuts against the inner wall of the pipe, and the sundries existing at the connection of the pipes are scraped off first. Subsequently, the rotation speed of the motor 3 is adjusted to repair the pipe gap, which can prevent impurities from mixing with the repair glue and affecting the repair effect of the repair glue.

[0040] Among them, a set of symmetrically arranged retaining pieces 16 are fixedly installed on the surface of the arc-shaped scraping plate 15. A notch 18 is formed on the surface of the arc-shaped scraping plate 15. A baffle 17 is fixedly installed on the surface of the arc-shaped scraping plate 15. A collection bin 19 is fixedly installed on the surface of the arc-shaped scraping plate 15. After the arc-shaped scraping plate 15 scrapes the impurities onto itself and the impurities continuously accumulate, the retaining pieces 16 and the baffle 17 cooperate with each other to enable the continuously accumulating impurities to enter the notch 18. When the impurities enter the notch 18, they are collected by the collection bin 19, reducing the situation where the impurities fall on the connection between the two pipes after being scraped off and affecting the effective repair of the subsequent repair glue.

[0041] Among them, an arc-shaped plate 20 is fixedly installed on the surface of the output shaft 5. A wiping block 21 is fixedly installed on the inner wall of the arc-shaped plate 20. After the repair pipe 6 sprays the colloid at the repair location, the arc-shaped plate 20 drives the wiping block 21 to wipe the repair location, which can wipe and squeeze the colloid into the gap at the repair location, and at the same time make the glue evenly applied, improving the repair effect and preventing the colloid from not being able to enter the gap.

[0042] Among them, a pressing plate 22 is rotatably installed on the inner wall of the arc-shaped plate 20. An elastic rope 24 is fixedly installed on the surface of the pressing plate 22. The other end of the elastic rope 24 is fixedly connected to the surface of the arc-shaped plate 20. A counterweight 23 is fixedly installed on the surface of the arc-shaped plate 20. The wiping block 21 is made of sponge. The wiping block 21 made of sponge material is easy to absorb glue and wipes faster. The elastic rope 24 and the pressing plate 22 cooperate with each other to make the wiping block 21 always in a squeezed state. When the output shaft 5 rotates, the counterweight 23 is affected by centrifugal force and makes the pressing plate 22 rotate, no longer squeezing the wiping block 21. At this time, the wiping block 21 is in a natural fluffy state, with increased flexibility, which is convenient for improving the effect of the wiping block 21 to spread the colloid evenly. However, when the wiping block 21 wipes the repair glue, some of the colloid may enter the wiping block 21. When the rotation speed of the output shaft 5 slows down, the elastic rope 24 drives the pressing plate 22 to reset and squeeze the wiping block 21 again, squeezing out the colloid in the wiping block 21, enabling the glue to be fully utilized and reducing the waste of glue.

[0043] Among them, a support rod 25 is fixedly installed on the surface of the moving frame 1, a connecting block 26 is rotatably installed on the surface of the support rod 25, and a sector plate 27 is fixedly installed on the surface of the connecting block 26; when the moving frame 1 moves into the pipeline, when the sector plate 27 encounters impurities such as silt, it will drive the connecting block 26 to rotate along the support rod 25, facilitating the movement of the moving frame 1 into the pipeline. When the moving frame 1 moves out of the pipeline, the sector plate 27 abuts against the moving frame 1, scraping the impurities accumulated at the lower part inside the pipeline out of the pipeline, achieving the effect of cleaning the inside of the pipeline and reducing the probability of blockage inside the pipeline.

[0044] Embodiment 2

[0045] As Figure 7 shown, compared with Embodiment 1, another implementation manner of the present invention is: a groove is formed on the surface of the extrusion rod 10, and a roller 28 is rotatably installed on the inner wall of the groove; when the extrusion rod 10 is about to contact the air bag 12, the roller 28 abuts against the air bag 12. When the output shaft 5 rotates, the roller 28 rotates on the surface of the air bag 12, preventing the extrusion rod 10 from directly contacting the air bag 12, reducing the friction between the extrusion rod 10 and the air bag 12, and thus extending the service life of the air bag 12.

[0046] As Figure 8 shown, a trenchless repair method for municipal pipelines, this method uses the above-mentioned trenchless repair equipment for municipal pipelines, and this method includes the following steps:

[0047] S1: When repairing the pipeline, place the whole equipment in the pipeline, and use the remote control equipment to control the remote control wheel 2 to rotate so that the moving frame 1 moves to the designated position;

[0048] S2: When the equipment moves to the position where repair is required, start the motor 3, the output shaft 5 of the motor 3 rotates, and drives the repair pipe 6 filled with repair glue to rotate;

[0049] S3: The centrifugal force generated when the repair pipe 6 rotates drives the piston block 8 to move and stretch the spring 7. When the piston block 8 moves, the repair glue is extruded, and the extruded repair glue will enter the gap between the pipeline and the pipeline to complete the repair.

[0050] A trenchless repair method for municipal pipelines, this method further includes the following steps:

[0051] S4: When repairing, the output shaft 5 rotates and drives the elastic arc plate 9 to rotate. The elastic arc plate 9 is slightly deformed under the influence of centrifugal force and drives the extrusion rod 10 away from the output shaft 5;

[0052] S5: When the extrusion rod 10 moves, it abuts against the airbag 12. The gas in the airbag 12 enters the mounting bracket 11, increasing the air pressure inside the mounting bracket 11 and causing the limiting rod 14 to move away from the collar 13 and abut against the inner wall of the pipeline, fixing the moving bracket 1 inside the pipeline.

[0053] Working principle: After the pipeline is buried underground and used for a long time, gaps will appear due to the loosening of the connection between pipelines. When repairing the pipeline, the whole device is placed inside the pipeline, and the remote control wheel 2 is rotated by using the remote control device to move the moving frame 1 to the designated position. When the device moves to the position that needs to be repaired, the motor 3 is started. The output shaft 5 of the motor 3 rotates and drives the repair pipe 6 filled with repair glue to rotate. The centrifugal force generated when the repair pipe 6 rotates drives the piston block 8 to move and stretch the spring 7. When the piston block 8 moves, the repair glue is extruded. The extruded repair glue will enter the gap between the pipelines, completing the repair to prevent leakage of the pipeline during subsequent use. Since the repair is carried out inside the pipeline, the fluid inside the pipeline is not likely to wash away the repair material when flowing; when the repair pipe 6 rotates, the output shaft 5 rotates and drives the elastic arc plate 9 to rotate. The elastic arc plate 9 undergoes slight deformation under the influence of centrifugal force and drives the extrusion rod 10 away from the output shaft 5. When the extrusion rod 10 moves, it abuts against the air bag 12. The gas in the air bag 12 enters the mounting frame 11. The air pressure in the mounting frame 11 increases and makes the limit rod 14 move away from the collar 13 and abut against the inner wall of the pipeline, fixing the moving frame 1 inside the pipeline, thereby improving the stability of the device during the repair of the repair pipe 6 and enhancing the repair efficiency; when repairing the gap between two pipelines, the output shaft 5 first rotates at a lower speed to drive the arc-shaped scraper 15 to rotate (when the output shaft 5 rotates at a lower speed, the piston block 8 cannot move due to centrifugal force, so the repair glue in the repair pipe 6 will not overflow). When the arc-shaped scraper 15 rotates, due to the existence of centrifugal force, the end of the arc-shaped scraper 15 away from the output shaft 5 abuts against the inner wall of the pipeline, scraping off the sundries existing at the connection of the pipelines first. Subsequently, the rotation speed of the motor 3 is adjusted to repair the pipeline gap, which can prevent impurities from mixing with the repair glue and affecting the repair effect of the repair glue; after the arc-shaped scraper 15 scrapes the impurities onto the arc-shaped scraper 15 and they accumulate continuously, the baffle 16 and the baffle 17 cooperate with each other to enable the continuously accumulating impurities to enter the notch 18. When the impurities enter the notch 18, they are collected by the collection bin 19; after the repair pipe 6 sprays the colloid at the repair location, the arc-shaped plate 20 drives the wiping block 21 to wipe the repair location, which can wipe and extrude the colloid into the gap of the repair location, and at the same time make the glue evenly applied, improving the repair effect and preventing the colloid from not being able to enter the gap; the elastic rope 24 and the pressing plate 22 cooperate with each other to make the wiping block 21 always in a squeezed state. When the output shaft 5 rotates, the counterweight 23 is affected by centrifugal force to make the pressing plate 22 rotate and no longer squeeze the wiping block 21. At this time, the wiping block 21 is in a natural fluffy state with increased flexibility, which is convenient for improving the effect of the wiping block 21 to smear the colloid evenly. However, when the wiping block 21 wipes the repair glue, part of the colloid may enter the wiping block 21. When the rotation speed of the output shaft 5 slows down, the elastic rope 24 drives the pressing plate 22 to reset and squeeze the wiping block 21 again, extruding the colloid in the wiping block 21, enabling the glue to be fully utilized and reducing the waste of glue;When the moving frame 1 moves into the pipeline, when the sector plate 27 encounters impurities such as silt, it will drive the connecting block 26 to rotate along the support rod 25, facilitating the movement of the moving frame 1 into the pipeline. When the moving frame 1 moves out of the pipeline, the sector plate 27 abuts against the moving frame 1, scraping the impurities accumulated at the lower part inside the pipeline out of the pipeline, achieving the effect of cleaning the inside of the pipeline and reducing the probability of blockage inside the pipeline; when the extrusion rod 10 is about to contact the air bag 12, the roller 28 abuts against the air bag 12. When the output shaft 5 rotates, the roller 28 rotates on the surface of the air bag 12, preventing the extrusion rod 10 from directly contacting the air bag 12, reducing the friction between the extrusion rod 10 and the air bag 12, and thus extending the service life of the air bag 12.

[0054] The above front, back, left, right, up, and down are all based on the Figure 1 description in the accompanying drawings of the specification. Taking the perspective of the person observing as the standard, the side of the device facing the observer is defined as the front, and the left side of the observer is defined as the left, and so on.

[0055] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention.

[0056] The above shows and describes 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 by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A trenchless repair device for municipal pipelines, characterized in that: It includes a mobile frame (1). Inside the mobile frame (1), a set of remote control wheels (2) are arranged. The remote control wheels (2) are controlled by a remote control device. A set of limiting rods (4) are fixedly installed on the inner surface of the mobile frame (1). The other end of the limiting rod (4) is fixedly installed with a motor (3). Inside the motor (3), an output shaft (5) is arranged. A repair pipe (6) is fixedly installed on the surface of the output shaft (5). A spring (7) is fixedly installed on the inner wall of the repair pipe (6). The other end of the spring (7) is fixedly installed with a piston block (8). Repair glue is arranged inside the repair pipe (6). An installation frame (11) is fixedly installed on the surface of the mobile frame (1). A collar (13) is fixedly installed on the surface of the installation frame (11). A limiting rod (14) is slidably installed on the inner wall of the collar (13). An air bag (12) is fixedly installed on the inner surface of the installation frame (11). The installation frame (11) has a hollow structure and is in communication with the air bag (12). An elastic arc plate (9) is fixedly installed on the surface of the output shaft (5). An extrusion rod (10) is fixedly installed on the surface of the elastic arc plate (9).

2. The trenchless repair equipment for municipal pipelines according to claim 1, characterized in that: An arc-shaped scraping plate (15) is fixedly installed on the surface of the output shaft (5). The end of the arc-shaped scraping plate (15) away from the output shaft (5) is flat. The output shaft (5) rotates counterclockwise.

3. A trenchless repair device for municipal pipelines according to claim 2, characterized in that: A set of symmetrically arranged baffle plates (16) are fixedly installed on the surface of the arc-shaped scraping plate (15). A notch (18) is formed on the surface of the arc-shaped scraping plate (15). A baffle (17) is fixedly installed on the surface of the arc-shaped scraping plate (15). A collection bin (19) is fixedly installed on the surface of the arc-shaped scraping plate (15).

4. The trenchless repair equipment for municipal pipelines according to claim 3, characterized in that: An arc-shaped plate (20) is fixedly installed on the surface of the output shaft (5). A wiping block (21) is fixedly installed on the inner wall of the arc-shaped plate (20).

5. A trenchless repair device for municipal pipelines according to claim 4, characterized in that: A pressing plate (22) is rotatably installed on the inner wall of the arc-shaped plate (20). An elastic rope (24) is fixedly installed on the surface of the pressing plate (22). The other end of the elastic rope (24) is fixedly connected to the surface of the arc-shaped plate (20). A counterweight block (23) is fixedly installed on the surface of the arc-shaped plate (20). The wiping block (21) is made of sponge.

6. The trenchless repair equipment for municipal pipelines according to claim 5, characterized in that: A support rod (25) is fixedly installed on the surface of the mobile frame (1). A connecting block (26) is rotatably installed on the surface of the support rod (25). A sector plate (27) is fixedly installed on the surface of the connecting block (26).

7. The trenchless repair equipment for municipal pipelines according to claim 6, characterized in that: A groove is formed on the surface of the extrusion rod (10). A roller (28) is rotatably installed on the inner wall of the groove.

8. A trenchless repair method for municipal pipelines, which uses the trenchless repair equipment for municipal pipelines described in any one of claims 1-7, and is characterized in that: The method includes the following steps: S1: When repairing a pipeline, place the whole device inside the pipeline and use the remote control device to control the rotation of the remote control wheels (2) to move the mobile frame (1) to a designated position; S2: When the device moves to the position where repair is needed, start the motor (3). The output shaft (5) of the motor (3) rotates and drives the repair pipe (6) filled with repair glue to rotate; S3: When the repair pipe (6) rotates, the centrifugal force generated drives the piston block (8) to move and stretch the spring (7). When the piston block (8) moves, the repair glue is extruded. The extruded repair glue will enter the gap between the pipes to complete the repair.

9. A trenchless repair method for municipal pipelines according to claim 8, characterized in that: This method further includes the following steps: S4: When repairing the pipe, the output shaft (5) rotates and drives the elastic arc plate (9) to rotate. The elastic arc plate (9) is slightly deformed under the influence of centrifugal force and drives the extrusion rod (10) away from the output shaft (5); S5: When the extrusion rod (10) moves, it abuts against the air bag (12). The gas in the air bag (12) enters the mounting bracket (11). The air pressure in the mounting bracket (11) increases and causes the limit rod (14) to move away from the collar (13) and abut against the inner wall of the pipe, fixing the moving frame (1) inside the pipe.

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