A smoothing device for trenchless pipeline repair

Abstract

This invention relates to the field of pipeline repair technology, and more particularly to a smoothing device for trenchless pipeline repair. It includes a fixed frame, a rotating sleeve rotatably connected to the fixed frame, symmetrically distributed connecting frames fixed to the rotating sleeve, a sliding rod symmetrically arranged on the connecting frames, a sliding plate slidably connected to the sliding rod, a helical spring fixed between the sliding rod and the sliding plate, a smoothing plate for smoothing the pipeline fixed to the sliding plate, a sealing sleeve on the rotating sleeve, a sliding rod slidably connected to the sealing sleeve, and a support frame fixed to the sliding rod. In this invention, before the smoothing plate moves to a protrusion on the inner wall of the pipeline, a roller contacts and rotates against the inner wall of the pipeline. After the roller contacts the protrusion, it approaches the rotating sleeve, increasing the pressure detected by the pressure sensor, thereby accurately locating the protrusion on the inner wall of the pipeline. This invention can be used even in low visibility conditions, improving the smoothing efficiency of the pipeline.

Description

Technical Field

[0001] This invention relates to the field of pipeline repair technology, and in particular to a smoothing device for trenchless pipeline repair. Background Technology

[0002] Underground pipelines, as a crucial component of urban infrastructure, serve vital functions such as drainage, water supply, gas supply, power supply, and telecommunications. However, due to their long-term burial underground, these pipelines are susceptible to damage such as deformation and rupture caused by external factors like soil pressure, ground load, and geological changes. In particular, when pipelines are subjected to uneven external pressure, localized plastic deformation occurs in the pipe wall, forming protrusions that bulge inwards. These protrusions significantly reduce the effective flow cross-section of the pipeline, affecting fluid transport efficiency and potentially leading to blockages or structural failure. Traditional pipeline repair methods typically require excavation to replace or repair damaged sections. Excavation repair is not only labor-intensive and costly but also disrupts the surrounding environment, traffic, and other underground pipelines. Therefore, trenchless repair technology, with its advantages of short construction cycles, minimal ground damage, low social impact, and high overall cost-effectiveness, has become one of the mainstream methods for modern pipeline repair.

[0003] In trenchless repair technology, the repair of protrusions inside pipelines usually involves mechanical extrusion and flattening. Existing technologies often use hydraulic push rod devices, which are inserted into the pipeline and use an arc-shaped plate installed at the end of the hydraulic push rod to apply radial pressure to the protrusion, pressing it back to its original shape. Before pipeline repair, the location of the protrusion needs to be determined in advance. Generally, image transmission equipment such as cameras is used to observe the location of the protrusion on the inner wall of the pipeline. However, for pipelines with poor visibility, even with additional lighting, it is still impossible to accurately determine the location of the protrusion. This may result in the need to use the hydraulic push rod device to extrude the protrusion multiple times, making the operation cumbersome. Summary of the Invention

[0004] To overcome the drawback of existing hydraulic push rod repair methods where the end of the hydraulic push rod presses against the protruding part of the inner wall of the pipe, causing local unevenness, this invention provides a smoothing device for precise positioning in trenchless pipe repair.

[0005] The technical solution is as follows: A smoothing device for trenchless pipeline repair includes a fixed frame, an electric wheel mounted on the fixed frame, a rotating sleeve rotatably connected to the fixed frame, a first power module for driving the rotating sleeve to rotate on the fixed frame, symmetrically distributed connecting frames fixed to the rotating sleeve, a sliding rod slidably connected to the symmetrically distributed connecting frames, a helical spring fixedly connected between the sliding rod and the sliding plate, a smoothing plate for smoothing the pipeline fixedly connected to the sliding plate, a sealing sleeve on the rotating sleeve, a sliding rod slidably connected to the sealing sleeve, a support frame fixedly connected to the sliding rod, a roller rotatably connected to the support frame, a sealing plug fixedly connected to the end of the sliding rod away from the support frame and slidably connected to the inside of the sealing sleeve, a pressure sensor disposed on the side of the sealing sleeve away from the sealing plug, and a compressible fluid filled inside the sealing sleeve.

[0006] As an improvement to the above solution, the rotating sleeve is splinedly connected to a rotating cylinder fixedly connected to the sealing sleeve. The rotating cylinder is provided with equally spaced inclined grooves. The sliding plate is fixedly connected with equally spaced limiting rods that slide within adjacent inclined grooves. The distance from the inclined groove to the axis of the rotating sleeve gradually increases from one side to the other. The rotating sleeve is provided with a second power module for driving the rotating cylinder to move.

[0007] As an improvement to the above scheme, the rotating sleeve is fixedly connected to symmetrically distributed rotating frames, and the lines connecting the center point of the flat plate, the center point of the roller, and the center point of the rotating frame to the axis of the rotating sleeve form an angle of 120° with each other.

[0008] As an improvement to the above solution, a diaphragm is provided inside the sealing sleeve between the sealing plug and the pressure sensor, and hydraulic oil is filled between the sealing plug and the diaphragm inside the sealing sleeve.

[0009] As an improvement to the above solution, a fixing ring is fixedly connected inside the sealing sleeve between the sealing plug and the diaphragm. The fixing ring is provided with a through hole, and a solenoid valve is provided inside the through hole of the fixing ring.

[0010] As an improvement to the above solution, the rotating frame is provided with an arc-shaped part, and the arc-shaped part of the rotating frame is slidably connected with equally spaced insertion rods. The insertion rods are fixedly connected with locking blocks, and the locking blocks are provided with locking plates for fixing fiber cloth. A spring is fixedly connected between the locking blocks and the adjacent rotating frames.

[0011] As an improvement to the above solution, the card plate is made of a deformable material and is used to fix the fiber cloth.

[0012] As an improvement to the above solution, the rotating drum is provided with spiral grooves that are evenly distributed and connected to the adjacent inclined grooves on it, the connecting frame is provided with arc-shaped grooves, and the sliding rod slides in the arc-shaped grooves of the symmetrically distributed connecting frame.

[0013] As an improvement to the above solution, the flat plate is provided with a guide portion for compressing the fiber cloth.

[0014] As an improvement to the above solution, both the card block and the card plate are provided with inclined surfaces, and the flat plate is used to press the card block and the card plate.

[0015] The beneficial effects of this invention are as follows: Before the smoothing plate moves to the protrusion on the inner wall of the pipe, the roller contacts the inner wall of the pipe and rotates. After the roller contacts the protrusion on the inner wall of the pipe, it approaches the rotating sleeve, increasing the pressure detected by the pressure sensor, thereby accurately positioning the protrusion on the inner wall of the pipe. There is no need to detect the position of the protrusion on the inner wall of the pipe relative to the pipe axis in advance. Then, the smoothing plate presses the protrusion on the inner wall of the pipe to achieve an automatic smoothing effect. It can also be used in low visibility conditions, improving the smoothing efficiency of the pipe. This device first detects the cracks in the protrusion on the inner wall of the pipe using its own detection function. Then, it clamps the fiber cloth with the clamping block and the clamping plate and moves it accurately to the vicinity of the crack in the pipe to be repaired. The pressure of the smoothing plate is used to gradually adhere the fiber cloth to the inner wall of the pipe, thereby simplifying the positioning and pressure process of the fiber cloth in the existing repair process, simplifying the operation process, and facilitating the repair of the inner wall of the pipe. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the rotating sleeve and connecting frame of the present invention;

[0018] Figure 3 This is a three-dimensional structural diagram of the sliding rod and sliding plate of the present invention;

[0019] Figure 4 This is a three-dimensional structural diagram of the inclined groove and limiting rod of the present invention;

[0020] Figure 5 This is a three-dimensional structural diagram of the sealing sleeve and pressure sensor of the present invention;

[0021] Figure 6 This is a three-dimensional structural diagram of the rotating sleeve and fiber cloth of the present invention;

[0022] Figure 7 This is a three-dimensional structural diagram of the flat sheet and fiber cloth of the present invention;

[0023] Figure 8This is a three-dimensional structural diagram of the card block and card plate that hold the fiber cloth according to the present invention.

[0024] The labels in the diagram are as follows: 1. Fixed frame, 111. Fiber cloth, 2. Rotating sleeve, 3. Connecting frame, 4. Sliding rod, 5. Sliding plate, 6. Smoothing plate, 601. Guide part, 7. Rotating cylinder, 701. Inclined groove, 702. Spiral groove, 8. Limiting rod, 9. Sealing sleeve, 91. Diaphragm, 10. Sliding rod, 11. Support frame, 12. Roller, 13. Sealing plug, 14. Pressure sensor, 15. Fixed ring, 16. Rotating frame, 17. Insert rod, 18. Locking block, 181. Locking plate, 19. Spring. Detailed Implementation

[0025] The above solution will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments can be further adjusted according to the conditions of specific manufacturers. Implementation conditions not specified are generally those in routine experiments. The rotation direction in the following embodiments is all referenced to… Figure 1 The direction shown in the right view.

[0026] Example 1

[0027] When a pipeline is subjected to external pressure, a bulge will form inwards. This bulge is usually flattened from the inside of the pipeline by using a hydraulic pusher. Before pipeline repair, it is necessary to determine the location of the bulge in advance. This is usually done by using image transmission equipment such as cameras to observe the location of the bulge on the inner wall of the pipeline. However, for pipelines with poor visibility, even with additional lighting, it is still impossible to accurately determine the location of the bulge. This may result in the need to use the hydraulic pusher device to press the bulge multiple times, which is cumbersome.

[0028] A smoothing device for trenchless pipeline repair, such as Figures 1-6As shown, the device includes a fixed frame 1, which is equipped with six electric wheels for moving the device within the pipeline. A rotating sleeve 2 is rotatably connected to the center of the fixed frame 1. The fixed frame 1 is equipped with a first power module for driving the rotating sleeve 2 to rotate. The first power module is a motor installed on the right side of the fixed frame 1. The output shaft of the motor is connected to the rotating sleeve 2 via a pulley and belt. The rotating sleeve 2 is fixedly connected to two symmetrically distributed connecting frames 3. The two connecting frames 3 are jointly provided with a sliding rod 4 (in this embodiment, the sliding rod 4 is considered to be fixedly connected to the two connecting frames 3). The sliding rod 4 is slidably connected to a sliding... The sliding plate 5 (with a rectangular groove on the side of the sliding plate 5 closest to the rotating sleeve 2, and the sliding rod 4 sliding within the rectangular groove of the sliding plate 5) is fixedly connected to the sliding rod 4 and the sliding plate 5. A helical spring located within the rectangular groove of the sliding plate 5 is fixedly connected to the side of the sliding plate 5 away from the rotating sleeve 2. A smoothing plate 6 for smoothing the pipe is fixedly connected to the side of the sliding plate 5 away from the rotating sleeve 2. The smoothing plate 6 has an arc-shaped surface concentric with the inner wall of the pipe. The smoothing plate 6 will gradually smooth out the protrusions on the inner wall of the pipe, making the inner wall of the pipe flat. The rotating sleeve 2 is splined with a rotating cylinder 7. The rotating cylinder 7 can only move laterally relative to the rotating sleeve 2 and cannot rotate relative to the rotating sleeve 2. The rotating sleeve 2 is provided with two inclined grooves 701 distributed on the left and right. Two limiting rods 8 are fixedly connected to the sliding plate 5 and slide within adjacent inclined grooves 701. The distance from the inclined groove 701 to the axis of the rotating sleeve 2 gradually increases from the right to the left. The rotating cylinder 7 moves to the right through the inclined grooves 701, causing the adjacent limiting rods 8 to move away from the rotating sleeve 2. The rotating sleeve 2 is provided with a second power module for moving the rotating cylinder 7. The second power module is a hydraulic push rod (not shown in the figure) installed on the rotating sleeve 2. The telescopic end of the hydraulic push rod is fixedly connected to the rotating cylinder 7. The rotating cylinder 7 is fixedly connected to a sealing sleeve 9 (the sealing sleeve 9 is connected to the flat plate 6). (The axis of the rotating sleeve 2 is deflected by 120°). The second power module can be an electric slide rail installed on the rotating sleeve 2. The electric slide rail has an electric slider (not shown in the figure) fixed to the rotating cylinder 7. The sealing sleeve 9 is slidably connected to the slide rod 10. The end of the slide rod 10 away from the sealing sleeve 9 is fixedly connected to the support frame 11. The support frame 11 is rotatably connected to the roller 12. The end of the slide rod 10 near the rotating sleeve 2 is fixedly connected to the sealing plug 13, which is slidably connected to the sealing sleeve 9. A pressure sensor 14 is provided on the side of the sealing sleeve 9 away from the sealing plug 13. The sealing sleeve 9 is filled with compressible fluid.

[0029] When this device is needed to smooth out a protruding part of a pipe, the operator first places the device inside the pipe and activates the six electric wheels on the mounting frame 1 to move the device to the vicinity of the protruding part. The position of the protruding part is then checked. After the check is completed, the protruding part is smoothed out. The check process is as follows: Initially, the smoothing plate 6 is not in contact with the inner wall of the pipe, while the roller 12 is in contact with the inner wall. The operator activates the first power module to rotate the rotating sleeve 2. The rotating sleeve 2 rotates the rotating drum 7. The rotating drum 7 limits the two limiting rods 8 through two inclined grooves 701 and rotates the two limiting rods 8. The two limiting rods 8 rotate the sliding rod 4 and the sliding plate 5. The rotating sleeve 2 drives the flat plate 6 to rotate, and at the same time, the rotating sleeve 2 drives the two connecting frames 3 to rotate. The connecting frames 3 and the sliding rod 4 rotate synchronously. During the rotation of the rotating sleeve 2, the rotating sleeve 2 drives the sliding rod 10, the support frame 11 and the roller 12 to rotate through the sealing sleeve 9. The roller 12 rolls close to the inner wall of the pipe. When the roller 12 contacts the protrusion of the inner wall of the pipe, the roller 12 is squeezed by the protrusion of the inner wall of the pipe and moves closer to the rotating sleeve 2. The roller 12 drives the sealing plug 13 to move closer to the rotating sleeve 2 through the support frame 11 and the sliding rod 10. The sealing plug 13 pushes the hydraulic oil in the sealing sleeve 9, causing the diaphragm 91 to deform. The pressure in the sealed cavity where the pressure sensor 14 is located increases, which increases the pressure it detects. The detection process is completed.

[0030] After the detection process is completed, a smoothing process is performed, specifically as follows: The first power module continues to drive the rotating sleeve 2 to rotate 120° (this 120° is the angle between the line connecting the roller 12 to the axis of the rotating sleeve 2 and the line connecting the smoothing plate 6 to the axis of the rotating sleeve 2; this 120° is only used as an example in this embodiment). During the continued rotation of the rotating sleeve 2, the roller 12 no longer contacts the protrusion on the inner wall of the pipe, the pressure in the sealed cavity where the pressure sensor 14 is located is restored, and the deformation of the diaphragm 91 is restored, so that the sealing plug 13 drives the roller 12 to continue to adhere tightly to the inner wall of the pipe through the slide rod 10 and the support frame 11. After the rotating sleeve 2 rotates 120°, the smoothing plate 6 rotates to the vicinity of the protrusion on the inner wall of the pipe and aligns with it. Then, the operator stops the first power module and the electric wheel, and starts the second power module to drive the rotating drum 7 to move to the right. Figure 2 (As shown in the front view direction), the inclined groove 701 of the rotating cylinder 7 causes the adjacent limiting rods 8 to move away from the rotating sleeve 2. The two limiting rods 8 drive the sliding plate 5 and the flat plate 6 to gradually move away from the rotating sleeve 2. The sliding plate 5 moves upward, causing the helical spring on it to be compressed. When the arc-shaped surface of the flat plate 6 contacts the protrusion of the inner wall of the pipe, the flat plate 6 continues to move away from the rotating sleeve 2 and squeezes the protrusion of the inner wall of the pipe. The protrusion of the inner wall of the pipe is gradually squeezed flat by the flat plate 6.

[0031] After the protrusions on the inner wall of the pipe are flattened, the limiting rod 8 is located on the left side of the adjacent inclined groove 701. Then, the operator stops the second power module, and the smoothing plate 6 stops moving. Since the arc surface of the smoothing plate 6 is concentric with the inner wall of the pipe, the smoothing plate 6 will gradually flatten the protrusions on the inner wall of the pipe, making the inner wall of the pipe smooth. After the protrusions on the inner wall of the pipe are flattened, the operator starts the second power module to drive the rotating drum 7 to move to the left. The helical spring on the sliding rod 4 resets, causing the sliding plate 5 to move closer to the rotating sleeve 2. The sliding plate 5 drives the smoothing plate 6 and the two limiting rods 8 to move closer to the rotating sleeve 2. When the limiting rod 8 is located on the right side of the adjacent inclined groove 701, the operator stops the second power module. The force module stops, and then the operator starts the electric wheel to remove the device from the pipeline. The device is then in use. Since the environment inside the pipeline is dark and it is not easy to observe the position of the protrusions, the roller 12 contacts the inner wall of the pipeline and rotates. After the roller 12 contacts the protrusions on the inner wall of the pipeline, it approaches the rotating sleeve 2, which increases the pressure detected by the pressure sensor 14, thereby accurately locating the protrusions on the inner wall of the pipeline. Then, the smoothing plate 6 is rotated to the vicinity of the protrusions on the inner wall of the pipeline and aligned. Then, the smoothing plate 6 is used to squeeze and smooth the protrusions on the inner wall of the pipeline. There is no need to detect the position of the protrusions on the inner wall of the pipeline relative to the pipeline axis in advance, thus achieving the effect of automatic smoothing.

[0032] Example 2

[0033] Based on Example 1, a smoothing device for trenchless pipeline repair, such as... Figures 1-8As shown, the rotating sleeve 2 is fixedly connected to two symmetrically distributed rotating frames 16. The lines connecting the center points of the smoothing plate 6, the roller 12, and the rotating frame 16 to the axis of the rotating sleeve 2 form an angle of 120° with each other. As the smoothing plate 6 approaches the protrusion on the inner wall of the pipe, the roller 12 and the rotating frame 16 together provide support for the entire device, thereby counteracting the reverse thrust generated by the smoothing plate 6 pressing the protrusion on the inner wall of the pipe, making it easier for the smoothing plate 6 to smooth the pipe. A fixing ring 15 is fixedly connected inside the sealing sleeve 9 between the sealing plug 13 and the diaphragm 91. A through hole is provided, and a solenoid valve is installed inside the through hole of the fixing ring 15. When the roller 12 detects the position of the protrusion on the inner wall of the pipe, the solenoid valve in the through hole of the fixing ring 15 is in the open state. A diaphragm 91 is provided inside the sealing sleeve 9, and hydraulic oil is filled between the sealing plug 13 and the diaphragm 91 inside the sealing sleeve 9. The sealing sleeve 9 and the diaphragm 91 cooperate to form a sealed cavity near the pressure sensor 14. The sealed cavity is filled with compressible fluid (the diaphragm 91 is used to prevent the hydraulic oil from contacting the pressure sensor 14, thereby ensuring the accuracy of the data from the pressure sensor 14). The rotating frame 16 has an arc-shaped section on the side away from the rotating sleeve 2. The arc-shaped section of the rotating frame 16 is slidably connected to equally spaced insertion rods 17. Each insertion rod 17 on the rotating frame 16 forms a group. A locking block 18 is fixedly connected to each insertion rod 17. The locking block 18 is equipped with a locking plate 181 for fixing the fiber cloth 111. The locking plate 181 is made of a deformable material and is used to fix the fiber cloth 111. A spring 19 is fixedly connected between the locking block 18 and the adjacent rotating frame 16. The rotating cylinder 7 has two spiral grooves 702 distributed to the left and right and connected to their adjacent inclined grooves 701, respectively. The deflection angle of groove 702 relative to the axis of rotating cylinder 7 is 120°. The side of connecting frame 3 away from rotating sleeve 2 is provided with an arc-shaped groove. The sliding rod 4 slides in the arc-shaped grooves of the two connecting frames 3. The smoothing plate 6 is provided with a guide part 601 for squeezing the fiber cloth 111. Both the clamping block 18 and the clamping plate 181 are provided with inclined surfaces. When the guide part 601 of the smoothing plate 6 contacts the inclined surfaces of the two clamping blocks 18 on the rear side, taking the two clamping blocks 18 on the rear side as an example, the guide part 601 of the smoothing plate 6 squeezes the inclined surfaces of the two clamping blocks 18 so that the two clamping blocks 18 move away from each other.

[0034] When existing pipelines are subjected to external pressure, protrusions appear on the inner wall of the pipeline. However, when the pressure on the outer wall of the pipeline exceeds its bearing capacity, cracks will appear on the protrusions on the inner wall of the pipeline. At this time, simply smoothing the pipeline is not enough to repair it. Therefore, in the past, after cracks appeared on the inner wall of the pipeline, a fiber cloth coated with adhesive was generally attached to the vicinity of the crack to seal the pipeline. However, the existing pipeline smoothing device does not have the function of crack repair, which makes the whole repair process cumbersome. This device uses the detection function of Embodiment 1 to accurately move the fiber cloth 111 to the vicinity of the crack in the pipeline that needs to be repaired, and gradually attaches the fiber cloth 111 to the inner wall of the pipeline through the smoothing plate 6 in Embodiment 1. This simplifies the positioning and pressure process of the fiber cloth 111 in the existing repair process, simplifies the operation process, and facilitates the repair of the inner wall of the pipeline.

[0035] The specific operation is as follows: The operator first places the fiber cloth 111 according to... Figure 6 The state shown is fixed between the two sets of locking blocks 18 and the fiber cloth 111 is locked by the locking plate 181. Then, in this embodiment, after the smoothing plate 6 smooths the protrusion of the inner wall of the pipe in embodiment 1, additional operations are performed. After the smoothing plate 6 smooths the protrusion of the inner wall of the pipe, the limiting rod 8 is located on the left side of the adjacent inclined groove 701. Taking the protrusion of the inner wall of the pipe as the upper side of the pipe as an example, at this time, the smoothing plate 6 is located above the rotating sleeve 2. Then the operator starts the first power module to drive the rotating sleeve 2 to rotate clockwise. The smoothing plate 6 rotates clockwise around the fixed frame 1. The rotating sleeve 2 drives the two rotating frames 16 to rotate clockwise. The two rotating frames 16 drive the fiber cloth 111 to rotate clockwise through the insert rod 17, locking block 18 and locking plate 181 on them. When the rotating sleeve 2 rotates 120° clockwise, the state is as follows. Figure 6 As shown, the fiber cloth 111 is located above the rotating sleeve 2 and below the crack in the inner wall of the pipe. Then, the operator stops the first power module and starts the second power module to drive the rotating drum 7 to move to the right. The movement of the rotating drum 7 to the right causes the limiting rod 8 to enter the spiral groove 702 from the inclined groove 701. The limiting rod 8 is limited by the adjacent spiral groove and begins to rotate counterclockwise around the rotating sleeve 2. The two limiting rods 8 drive the sliding rod 4, the sliding plate 5 and the flat plate 6 to rotate counterclockwise. The sliding rod 4 slides on the two connecting frames 3. At the same time, the flat plate 6 rotates counterclockwise around the rotating sleeve 2 and gradually approaches the fiber cloth 111.

[0036] When the positional relationship between the flat plate 6 and the fiber cloth 111 is as follows: Figure 7As shown, as the smoothing plate 6 continues to rotate counterclockwise around the rotating sleeve 2, the guide part 601 of the smoothing plate 6 first contacts and squeezes the rear side of the fiber cloth 111, causing the fiber cloth 111 to adhere to the inner wall of the pipe. When the guide part 601 of the smoothing plate 6 contacts the inclined surfaces of the two rear clamping blocks 18, taking the two rear clamping blocks 18 as an example, the guide part 601 of the smoothing plate 6 squeezes the inclined surfaces of the two clamping blocks 18, causing the two clamping blocks 18 to move away from each other. The two clamping blocks 18 drive the two clamping plates 181 and the two insert rods 17 to move away from each other, and the two springs 19 are compressed. Finally, the two clamping blocks 18 release their clamping on the fiber cloth 111 and are located on both sides of the smoothing plate 6, which limit their movement and prevents them from getting closer. As the smoothing plate 6 continues to rotate counterclockwise around the rotating sleeve 2, the smoothing plate 6 causes the fiber cloth 111 to gradually adhere to the inner wall of the pipe from back to front, and the clamping blocks 18 and clamping plates 181 gradually release their clamping on the fiber cloth 111 from back to front. By moving the locking blocks 18 and the locking plate 181 to both sides of the smoothing plate 6, the locking plate 181 is prevented from being located between the fiber cloth 111 and the inner wall of the pipe, which would make it difficult to remove the locking plate 181 from the bonded fiber cloth 111 and the inner wall of the pipe. When the limiting rod 8 moves to the front of the adjacent inclined spiral groove, the smoothing plate 6 completely adheres the fiber cloth 111 to the inner wall of the pipe. The operator stops the second power module, and the fiber cloth 111 repairs the crack in the inner wall of the pipe. The bonding process of the fiber cloth 111 is completed. Then, the operator maintains this state and starts the electric wheel to remove the device from the pipe. After the device is removed from the pipe, the operator starts the second power module to drive the rotating drum 7 to move to the left. The spiral groove causes the limiting rod 8 to rotate clockwise around the rotating sleeve 2. At the same time, the smoothing plate 6 rotates clockwise around the rotating sleeve 2 and gradually moves out from between the two sets of locking blocks 18. The spring 19 releases its elasticity, causing the locking blocks 18 to move and reset. The final state is as follows. Figure 1 As shown, the operator stops the second power module, and the use of this device is completed. If further repairs are needed at other locations on the pipeline, the fiber cloth 111 needs to be reinstalled between the two sets of clamps 18.

[0037] When the roller 12 detects the position of the protrusion on the inner wall of the pipe, the solenoid valve in the through hole of the fixing ring 15 is in the open state, and the hydraulic oil in the sealing sleeve 9 freely passes through the through hole of the fixing ring 15. Before the smoothing plate 6 approaches the protrusion on the inner wall of the pipe and squeezes it, the operator closes the solenoid valve in the through hole of the fixing ring 15. At this time, the roller 12 is in contact with the inner wall of the pipe and cannot approach the rotating sleeve 2. At the same time, the two rotating frames 16 are in contact with the inner wall of the pipe. During the process of the smoothing plate 6 approaching the protrusion on the inner wall of the pipe, it provides support for the entire device, thereby counteracting the reverse thrust generated by the smoothing plate 6 squeezing the protrusion on the inner wall of the pipe, making it easier for the smoothing plate 6 to smooth the pipe.

[0038] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

Claims

1. A flattening device for trenchless repair of pipelines, comprising a fixing frame (1) provided with an electric wheel, the fixing frame (1) being rotationally connected with a rotating sleeve (2), the fixing frame (1) being provided with a first power module for driving the rotating sleeve (2) to rotate, the rotating sleeve (2) being fixedly connected with symmetrically distributed connecting frames (3), the symmetrically distributed connecting frames (3) being commonly provided with a sliding rod (4), the sliding rod (4) being slidingly connected with a sliding plate (5), a helical spring being fixedly connected between the sliding rod (4) and the sliding plate (5), the sliding plate (5) being fixedly connected with a flattening plate (6) for flattening pipelines, characterized in that, The rotating sleeve (2) is provided with a sealing sleeve (9), the sealing sleeve (9) is slidably connected with a sliding rod (10), the sliding rod (10) is fixedly connected with a support frame (11), the support frame (11) is rotatably connected with a roller (12), one end of the sliding rod (10) away from the support frame (11) is fixedly connected with a sealing plug (13) which is sealingly connected in the sealing sleeve (9), one side of the sealing sleeve (9) away from the sealing plug (13) is provided with a pressure sensor (14), and the sealing sleeve (9) is filled with compressible fluid. The rotating sleeve (2) is spline-connected with a rotating drum (7) fixedly connected with the sealing sleeve (9), the rotating drum (7) is provided with equidistantly distributed inclined grooves (701), the sliding plate (5) is fixedly connected with equidistantly distributed limiting rods (8) which slide in adjacent inclined grooves (701), the distance from the inclined grooves (701) to the axis of the rotating sleeve (2) gradually increases from one side to the other side, and the rotating sleeve (2) is provided with a second power module for driving the rotating drum (7) to move. The rotating sleeve (2) is fixedly connected with symmetrically distributed rotating frames (16), and the center points of the smoothing plate (6), the roller (12) and the rotating frame (16) are respectively connected with the axis of the rotating sleeve (2) at an angle of 120°. The rotating drum (7) is provided with equidistantly distributed spiral grooves (702) which are respectively communicated with adjacent inclined grooves (701) thereon, the connecting frame (3) is provided with an arc-shaped groove, and the sliding rod (4) slides in the arc-shaped groove of the symmetrically distributed connecting frame (3).

2. A bullnose for trenchless rehabilitation of a pipe according to claim 1, characterized in that The sealing sleeve (9) is provided with a diaphragm (91) between the sealing plug (13) and the pressure sensor (14), and the sealing plug (13) and the diaphragm (91) in the sealing sleeve (9) are filled with hydraulic oil.

3. A bullnose for trenchless rehabilitation of a pipe according to claim 2, characterized in that The sealing sleeve (9) is fixedly connected with a fixing ring (15) between the sealing plug (13) and the diaphragm (91), the fixing ring (15) is provided with a through hole, and the through hole of the fixing ring (15) is provided with a solenoid valve.

4. A patching device for trenchless rehabilitation of a pipe according to claim 3, characterized in that The rotating frame (16) is provided with an arc-shaped portion, the arc-shaped portion of the rotating frame (16) is slidably connected with equidistantly distributed insertion rods (17), the insertion rods (17) are fixedly connected with clamping blocks (18), the clamping blocks (18) are provided with clamping plates (181) for fixing fiber cloths (111), and the clamping blocks (18) and adjacent rotating frames (16) are fixedly connected with springs (19).

5. A patching device for trenchless rehabilitation of a pipe according to claim 4, characterized in that The clamping plate (181) is made of deformable material and is used for fixing the fiber cloth (111).

6. A patching device for trenchless rehabilitation of a pipe according to claim 5, characterized in that The smoothing plate (6) is provided with a guide portion (601) for extruding the fiber cloth (111).

7. A patching device for trenchless rehabilitation of a pipe according to claim 6, characterized in that The clamping block (18) and the clamping plate (181) are both provided with inclined surfaces, and the smoothing plate (6) is used for extruding the clamping block (18) and the clamping plate (181).

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