A trenchless pipe rehabilitation apparatus

Abstract

The application discloses a pipeline trenchless repair device and relates to the technical field of pipeline repair. The pipeline trenchless repair device comprises a pipeline, a ball walking mechanism arranged on the inner wall of the pipeline along the axial line of the pipeline and used for walking on the inner wall of the pipeline, and a connecting structure arranged at the two ends of the ball walking mechanism along the axial line of the ball walking mechanism and used for connecting a repair expansion structure. The repair expansion structure is driven by a motor-driven screw rod, the screw rod sleeve is moved along the axial line of the sleeve, and then the installation block and the repair expansion plate are expanded by the linkage of the connecting rod and the hinged rod. The semicircular repair expansion plate can be in uniform contact with the inner wall of the pipeline, the recessed part of the pipeline is repaired by using controllable expansion force, and the original shape and the drift diameter of the pipeline are effectively restored. At least two installation blocks form an installation groove structure, the stability of the expansion process of the repair expansion plate is ensured, the uneven force condition is avoided, and the repair quality is improved.

Description

Technical Field

[0001] This invention relates to the field of pipeline repair technology, specifically to a trenchless pipeline repair device. Background Technology

[0002] With prolonged use, urban sewage drainage pipes are prone to various defects, such as damage and leakage, which can lead to environmental pollution incidents. To ensure the normal operation of sewage drainage pipes, timely repair is necessary. Existing pipe repair methods include open-cut repair and trenchless repair. Open-cut repair involves a large workload and consumes significant manpower and resources. In contrast, trenchless repair offers advantages such as a smaller workload, reduced manpower and resources, and less impact on the surrounding environment.

[0003] In the construction and maintenance of urban infrastructure, underground pipelines are key facilities for transporting media such as water, gas, and sewage. Due to geological subsidence, external loads, and material aging, they have been buried underground for a long time and have problems such as local depressions and deformation. Traditional pipeline repair methods mostly adopt excavation construction, which requires damage to the ground road surface or buildings. This not only seriously interferes with traffic and residents' lives, but also has drawbacks such as long construction period, high cost, and environmental pollution.

[0004] Therefore, this application proposes a trenchless pipeline repair device. Summary of the Invention

[0005] The purpose of this invention is to provide a trenchless pipeline repair device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a trenchless pipeline repair device, comprising a pipeline; A ball bearing traveling mechanism is disposed along the axis of the pipe on the inner wall of the pipe for traveling along the inner wall of the pipe. A connecting structure is provided at both ends of the ball travel mechanism along the axis of the ball travel mechanism, and is used to connect the repair expansion structure. A repair expansion structure is installed at one end of the connection structure to repair the dent in the pipe.

[0007] As a specific solution of the technical solution of this application, the ball bearing traveling mechanism includes a fixed seat, a groove is provided at one end of the fixed seat, a connecting spring is provided in the groove, a connecting sleeve is installed at the other end of the connecting spring, and a connecting cylinder is connected to the other end of the connecting sleeve.

[0008] As a specific embodiment of the technical solution of this application, the outer wall of the connecting sleeve is provided with mounting holes at equal intervals, a telescopic rod is installed in the mounting holes, a compression spring is provided on the outer wall of the telescopic rod, and a rolling seat is installed at the telescopic end of the telescopic rod. A ball bearing hole is provided at the top of the rolling seat, and a movable ball bearing is rolled in the ball bearing hole.

[0009] As a specific embodiment of the technical solution of this application, the connection structure includes a mounting base, which is divided into a first end face and a second end face. The first end face of the mounting base has a fixing hole that is adapted to the connecting spring, and the second end face is fitted with a fixing sleeve.

[0010] As a specific embodiment of the technical solution of this application, the outer wall of the fixed sleeve is provided with mounting grooves evenly distributed, the mounting grooves are opened along the axis of the fixed sleeve, and bolts are installed in the mounting grooves for fixing the mounting base. A fixing plate is provided on the other end face of the fixed sleeve, and the fixing plate is connected to the fixed sleeve by a screw.

[0011] As a specific embodiment of the technical solution of this application, the repair and expansion structure includes a sleeve and at least two mounting blocks, with a mounting groove formed between the two mounting blocks. A limiting plate is installed at the bottom end of the sleeve, and the limiting plate is connected to the fixing plate. A movable groove is provided along the axis of the sleeve, and the movable grooves are equidistantly distributed on the outer wall of the sleeve.

[0012] As a specific embodiment of the technical solution of this application, a lead screw is rotatably provided at the center of one end of the limiting plate. The lead screw is located at the center of the sleeve, and a motor is installed at the top of the sleeve. The output end of the motor is connected to the lead screw. A lead screw sleeve is threaded on the outer wall of the lead screw. Connecting blocks are equidistantly arranged on the outer wall of the lead screw sleeve. The connecting blocks and the lead screw sleeve are integrally formed.

[0013] As a specific embodiment of the technical solution of this application, hinge seats are equidistantly distributed near the outer wall of the top end of the sleeve, and stop blocks are equidistantly distributed near the outer wall of the bottom end of the sleeve. The stop blocks are fan-shaped structures, and both the hinge seats and the stop blocks are integrally formed with the sleeve.

[0014] As a specific embodiment of the technical solution of this application, the connecting block is connected to the two sides by bolts with connecting rods, the inner walls of the hinge seat are hinged with hinge rods, the other end of the hinge rod is hinged with a hinge block, the other end of the connecting rod is hinged with a connecting seat, and the connecting seat and the hinge block are located in the sliding groove.

[0015] As a specific embodiment of the technical solution of this application, the top of the mounting block is connected to a repair expansion plate by a screw. The repair expansion plate has a semi-arc structure and is in contact with the inner wall of the pipe.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This trenchless pipeline repair device achieves flexible movement within the pipeline wall through a ball bearing traveling mechanism. The cooperation between the connecting spring and the connecting sleeve gives the connecting cylinder a certain buffering and adjustment capability. The combined structure of the telescopic rod, compression spring, and moving ball bearings ensures that the moving ball bearings always fit tightly against the pipeline wall through the elastic force of the compression spring, adapting to the travel needs of different pipeline diameters. The rolling friction design of the moving ball bearings reduces the resistance during equipment movement, improves travel stability, and ensures that the equipment moves precisely along the axis within the pipeline.

[0017] Meanwhile, the repair expansion structure is driven by a motor-driven screw, which moves the screw sleeve axially along the sleeve. This, in turn, pushes the mounting blocks and repair expansion plates to unfold through the linkage of the connecting rod and the hinge rod. The semi-circular repair expansion plate can make uniform contact with the inner wall of the pipe, and uses controllable expansion force to push and repair the dent in the pipe, effectively restoring the original shape and diameter of the pipe. At least two mounting blocks form an installation groove structure to ensure the stability of the repair expansion plate unfolding process, avoiding unevenness or uneven force, and improving the repair quality.

[0018] The connecting structure is adapted to the connecting spring of the ball travel mechanism through the fixing hole. The mounting groove on the fixing sleeve and the bolt make the mounting seat firmly fixed. The connection method between the fixing plate and the screw facilitates the quick disassembly and position adjustment of the repair expansion structure. The dual elasticity of the connecting spring and the compression spring in the ball travel mechanism enables the equipment to adapt to the slight undulations of the inner wall of the pipe and the changes in pipe diameter, reducing the impact damage to the equipment caused by the unevenness of the inner wall of the pipe and extending the service life of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the axonal structure of the ball bearing traveling structure of the present invention; Figure 3 This is a schematic diagram of the ball bearing travel mechanism of the present invention; Figure 4 This is a schematic diagram of the connection structure of the present invention; Figure 5 This is a schematic diagram of the repair and expansion structure of the present invention from an isometric perspective. Figure 6 This is a schematic diagram of the repair and expansion structure of the present invention; Figure 7 This is a schematic diagram of the sleeve structure of the present invention; Figure 8 This is a schematic diagram of the lead screw sleeve and connecting block of the present invention; Figure 9 This is a schematic diagram of the repair expansion plate of the present invention; Figure 10 This is a schematic diagram of the mounting block and connector of the present invention.

[0020] In the diagram: 1. Pipeline; 2. Ball bearing travel mechanism; 20. Fixed base; 21. Connecting cylinder; 22. Connecting spring; 23. Connecting sleeve; 24. Mounting hole; 25. Telescopic rod; 26. Compression spring; 27. Rolling seat; 28. Moving ball bearing 3. Connection structure; 30. Mounting base; 31. Fixing sleeve; 32. Mounting groove; 33. Fixing plate; 34. Fixing hole; 4. Repair the expansion structure; 40. Sleeve; 41. Limiting plate; 42. Motor; 43. Hinge seat; 44. Lead screw; 45. Connecting rod; 46. Moving groove; 47. Stop block; 48. Connecting block; 49. Lead screw sleeve; 490. Mounting block; 491. Connecting seat; 492. Repair the expansion plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "above," and "below" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0027] To address the problems of localized depressions and deformations in pipelines 1 that have been buried underground for a long time, as mentioned in the background art, due to factors such as geological settlement, external loads, and material aging, this application proposes a trenchless pipeline repair device, such as... Figure 1 As shown, the repair device includes a pipe 1, a ball bearing traveling mechanism 2, which is arranged along the axis of the pipe 1 on the inner wall of the pipe 1 for traveling along the inner wall of the pipe 1, and a connecting structure 3, which is arranged along the axis of the ball bearing traveling mechanism 2 at both ends of the ball bearing traveling mechanism 2 for connecting the repair expansion structure 4. The repair expansion structure 4 is arranged at one end of the connecting structure 3 for repairing the recessed part of the pipe 1.

[0028] In use, the ball bearing traveling mechanism 2 can be driven to travel inside the pipe 1. The traveling ball bearing traveling mechanism 2 drives the repair and expansion structure 4 connected by the connecting structure 2 to move inside the pipe 1 at the same time, thereby realizing the repair and expansion of the dented or deformed parts of the pipe 1 through the repair and expansion structure 4.

[0029] In this embodiment, the ball bearing traveling mechanism 2 can be a component that allows a person to move the connecting structure 3 and the repair and expansion structure 4. For example, in one embodiment of this application, the ball bearing traveling mechanism 2 includes a fixed base 20, one end of which has a groove, a connecting spring 22 is disposed in the groove, a connecting sleeve 23 is installed at the other end of the connecting spring 22, and a connecting cylinder 21 is connected to the other end of the connecting sleeve 23. Figure 3 As shown, threaded holes are equidistantly provided at one end of the fixing seat 20 for connecting the fixing seat 20 to the mounting seat 30 on the connecting structure 3. In use, the fixing seat 20 and the mounting seat 30 are connected by bolts. However, this connection may loosen over time. In another embodiment of this application, the fixing seat 20 and the mounting seat 30 can be an integrally formed structure, which increases the strength during use. Alternatively, the fixing seat 20 and the mounting seat 30 can be directly fixed. A fixed fixing seat 20 and the mounting seat 30 also increases the strength during use and prevents loosening. Figure 3 As mentioned earlier, a groove is provided on one end of the fixed base 20, and a connecting spring 22 is installed in the groove. A connecting sleeve 23 is installed on the other end of the connecting spring 22. In order to prevent the connecting spring 22 from being deflected due to compression, a telescopic connecting rod (not shown in the figure) is provided between the groove of the fixed base 20 and the connecting sleeve 23. The telescopic connecting rod can be retracted when subjected to pressure, and can be restored by the elastic force of the connecting spring 22.

[0030] In this embodiment of the application, in order to be able to move within pipe 1, such as Figure 3 As shown, mounting holes 24 are evenly distributed on the outer wall of the connecting sleeve 23. A telescopic rod 25 is fixedly connected to the mounting hole 24. A compression spring 26 is arranged along the axis of the telescopic rod 25. A rolling seat 27 is installed at the other end of the compression spring 26 and the telescopic rod 25. The rolling seat 27 has a convex structure, as shown in the figure. Figure 3 As shown, the rolling seat 27 is provided with a ball hole that allows the movable ball 28 to roll. The movable ball 28 can roll freely in the ball hole. In another embodiment of this application, the movable ball 28 is not restricted in any way, and a traveling wheel can also be installed on the rolling seat 27, as long as the entire ball traveling mechanism 2 can move freely in the pipe 1.

[0031] In order to connect the repair expansion structure 4 with the ball bearing traveling mechanism 2, a connecting structure 3 is installed between the repair expansion structure 4 and the ball bearing traveling mechanism 2. For example, in one embodiment of this application, the connecting structure 3 includes a mounting base 30, which is divided into a first end face and a second end face. The first end face of the mounting base 30 is provided with a fixing hole 34, which is adapted to the connecting spring 22. A fixing sleeve 31 is installed on the second end face. The outer wall of the fixing sleeve 31 is provided with mounting grooves 32 evenly distributed along the axis of the fixing sleeve 31. Bolts are installed in the mounting grooves 32 for fixing the mounting base 30. A fixing plate 33 is provided on the other end face of the fixing sleeve 31. The fixing plate 33 is connected to the fixing sleeve 31 by a screw.

[0032] It should be clear that in this embodiment, a fixing sleeve 31 is installed on the second end face of the mounting base 30. To increase the connection strength between the fixing sleeve 31 and the mounting base 30, in this application, the mounting base 30 and the fixing sleeve 31 can be connected by bolts or be an integrally formed structure, such as... Figure 4 As shown, mounting grooves 32 are equidistantly provided along the axis of the fixing sleeve 31. The bottom end of the mounting groove 32 and the mounting base 30 have concentric threaded holes, facilitating the fixing sleeve 31 and the mounting base 30 to be fixed with bolts, and also facilitating the disassembly of the mounting base 30 and the fixing sleeve 31. A fixing plate 33 is fixedly connected to the other end face of the fixing sleeve 31 by bolts. Figure 4 A mounting hole 24, coaxial with the threaded hole on the mounting groove 32, is provided between the contact surfaces of the fixing plate 33 and the fixing sleeve 31. The fixing sleeve 31 and the fixing plate 33 are then connected by bolts. To increase the overall strength of the connection structure 3, the fixing plate 33 and the fixing sleeve 31 can be integrally formed, or they can be welded together; no specific limitations are made in this application. It should be clear that in the embodiments of this application, the mounting groove 32 can be any slot that allows the mounting base 30 and the fixing plate 33 to be connected by bolts. That is, in the embodiments of this application, there are no limitations on the shape and structure of the mounting groove 32. For example, the mounting groove 32 can be a long strip or a semi-circular slot. For ease of use, a long strip slot is preferable, meaning that the long strip slot facilitates connection with the mounting base 30 and the fixing plate 33 by bolts.

[0033] In one embodiment of this application, such as Figures 5 to 10 As shown, the repair expansion structure 4 includes a sleeve 40 and at least two mounting blocks 490, with a mounting groove formed between the two mounting blocks 490. A limiting plate 41 is installed at the bottom end of the sleeve 40, and the limiting plate 41 is connected to the fixing plate 33. A moving groove 46 is provided along the axis of the sleeve 40, and the moving grooves 46 are equidistantly distributed on the outer wall of the sleeve 40.

[0034] A lead screw 44 is rotatably mounted at one end of the limiting plate 41. The lead screw 44 is located at the center of the sleeve 40, and a motor 42 is installed at the top of the sleeve 40. The output end of the motor 42 is connected to the lead screw 44. A lead screw sleeve 49 is threaded on the outer wall of the lead screw 44. Connecting blocks 48 are equidistantly arranged on the outer wall of the lead screw sleeve 49. The connecting blocks 48 and the lead screw sleeve 49 are integrally formed.

[0035] Hinges 43 are equidistantly distributed near the top outer wall of the sleeve 40, and blocks 47 are equidistantly distributed near the bottom outer wall of the sleeve 40. The blocks 47 are fan-shaped structures, and both the hinges 43 and the blocks 47 are integrally formed with the sleeve 40.

[0036] The connecting block 48 is connected to the connecting rod 45 by bolts on both sides. The hinge rod is hinged between the inner walls of the hinge seat 43. The other end of the hinge rod is hinged to the hinge block. The other end of the connecting rod 45 is hinged to the connecting seat 491. The connecting seat 491 and the hinge block are located in the sliding groove.

[0037] The top of the mounting block 490 is connected to a repair expansion plate 492 by a screw. The repair expansion plate 492 has a semi-arc structure and is in contact with the inner wall of the pipe 1.

[0038] It should be clear that, in one embodiment of this application, the mounting block 490 has a Z-shaped structure, and a mounting groove is formed between two mounting blocks 490 for mounting the connecting seat 491 and the hinge block, as shown below. Figure 10 As shown in the embodiment of this application, the two mounting blocks 490 are arranged opposite each other, so that a mounting groove can be formed between the two mounting blocks 490, and as... Figure 10 As shown, the connecting seat 491 has a T-shaped structure. In order to facilitate the connection between the sleeve 40 and the fixing plate 33 mentioned above, a stop 47 is provided on the outer wall of the sleeve 40. The stop 47 is connected to the fixing plate 33 by bolts. In order to increase the firmness between the stop 47 and the sleeve 40, in this application, the sleeve 40 and the stop 47 are integrally formed.

[0039] In one embodiment of this application, such as Figure 7As shown, hinge seats 43 are equidistantly installed on the outer wall near the top of the sleeve 40. To increase the strength of the hinge seats 43, in this application, the hinge seats 43 and the sleeve 40 are integrally formed. In another embodiment of this application, the hinge seats 43 and the sleeve 40 can be welded. Meanwhile, to enable the repair expansion plate 492 to move on the sleeve 40, a moving groove 46 is provided on the outer wall of the sleeve 40. Simultaneously, a lead screw 44 is provided on the inner wall of the sleeve 40. The bottom end of the lead screw 44 is connected to the fixing plate 33 via a plane bearing (not shown in the figure). A lead screw sleeve 49 is threaded onto the outer wall of the lead screw 44, and connecting blocks 48 are equidistantly installed on the outer wall of the lead screw sleeve 49. To increase the stability between the connecting blocks 48 and the lead screw sleeve 49, in this application, the connecting blocks 48 and the lead screw sleeve 49 are integrally formed. Figure 8 As shown, the connecting block 48 passes through the moving slot 46 opened on the sleeve 40, and is then connected to the connecting block 48 and the connecting seat 491 via the connecting rod 45, as shown. Figure 9 As shown, the connecting rod 45 is connected to the connecting block 48 and the connecting seat 491 by bolts, and then connected to the hinge seat 43 and the hinge block by a hinge rod. The hinge rod and the connecting rod 45 form a cross shape, and then the hinge rod and the connecting rod 45 are connected by screws, thus forming a retractable mechanism. Figure 9 As shown, a repair expansion plate 492 is installed on top of the mounting block 490. The repair expansion plate 492 is shaped to match the pipe 1 in order to repair dents and deformations in the pipe 1. Furthermore, to facilitate replacement of the repair expansion plate 492, as shown... Figure 9 As shown, coaxial countersunk holes are provided on the repair expansion plate 492 and the mounting block 490. Bolts are installed in the countersunk holes to connect the mounting block 490 and the repair expansion plate 492. In this application, the repair expansion plate 492 is made of rubber. In order to better observe the degree of dents and deformations in the pipe 1, cameras can be symmetrically installed on the outer wall of the fixing sleeve 31. The cameras can collect the location of dents and deformations in the pipe 1. In this application, the cameras are wireless Bluetooth cameras, and the specific situation inside the pipe 1 can be observed through a mobile phone. It should be noted that the power source of the lead screw 44 is the motor 42. The motor 42 is electrically connected through an external mobile power supply. The external mobile power supply can be installed on the outer wall of the fixing sleeve 31 to provide power to the motor 42.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A trenchless pipeline repair device, characterized in that: Including pipes (1); The ball bearing traveling mechanism (2) is arranged along the axis of the pipe (1) on the inner wall of the pipe (1) and is used to travel on the inner wall of the pipe (1); The connecting structure (3) is arranged at both ends of the ball travel mechanism (2) along the axis of the ball travel mechanism (2) and is used to repair the connection of the expansion structure (4); Repair expansion structure (4) is set at one end of the connection structure (3) and is used to repair the recessed part of the pipe (1).

2. The trenchless pipeline repair device according to claim 1, characterized in that: The ball bearing walking mechanism (2) includes a fixed seat (20), one end of which has a groove, and a connecting spring (22) is provided in the groove. A connecting sleeve (23) is installed at the other end of the connecting spring (22), and a connecting cylinder (21) is connected to the other end of the connecting sleeve (23).

3. The trenchless pipeline repair device according to claim 2, characterized in that: The outer wall of the connecting sleeve (23) is provided with mounting holes (24) at equal intervals. A telescopic rod (25) is installed in the mounting hole (24). A compression spring (26) is provided on the outer wall of the telescopic rod (25). A rolling seat (27) is installed at the telescopic end of the telescopic rod (25). A ball hole is provided at the top of the rolling seat (27). A movable ball (28) is rolled in the ball hole.

4. The trenchless pipeline repair device according to claim 1, characterized in that: The connection structure (3) includes a mounting base (30), which is divided into a first end face and a second end face. The first end face of the mounting base (30) is provided with a fixing hole (34), which is adapted to the connecting spring (22). The second end face is provided with a fixing sleeve (31).

5. A trenchless pipeline repair device according to claim 4, characterized in that: The outer wall of the fixed sleeve (31) is provided with mounting grooves (32) evenly distributed. The mounting grooves (32) are opened along the axis of the fixed sleeve (31). Bolts are installed in the mounting grooves (32) for fixing the mounting seat (30). A fixing plate (33) is provided on the other end face of the fixed sleeve (31). The fixing plate (33) is connected to the fixed sleeve (31) by a screw.

6. The trenchless pipeline repair device according to claim 1, characterized in that: The repair expansion structure (4) includes a sleeve (40) and at least two mounting blocks (490), with a mounting groove formed between the two mounting blocks (490). A limiting plate (41) is installed at the bottom of the sleeve (40), and the limiting plate (41) is connected to the fixing plate (33). A moving groove (46) is provided along the axis of the sleeve (40), and the moving grooves (46) are equidistantly distributed on the outer wall of the sleeve (40).

7. A trenchless pipeline repair device according to claim 6, characterized in that: The limiting plate (41) has a lead screw (44) rotatably mounted at one end of its center. The lead screw (44) is located at the center of the sleeve (40), and a motor (42) is installed at the top of the sleeve (40). The output end of the motor (42) is connected to the lead screw (44). The lead screw (44) has a lead screw sleeve (49) threaded on its outer wall. The lead screw sleeve (49) has connecting blocks (48) equidistantly arranged on its outer wall. The connecting blocks (48) and the lead screw sleeve (49) are integrally formed.

8. A trenchless pipeline repair device according to claim 6, characterized in that: Hinges (43) are provided at equal intervals near the top outer wall of the sleeve (40), and blocks (47) are provided at equal intervals near the bottom outer wall of the sleeve (40). The blocks (47) are fan-shaped structures. Both the hinges (43) and the blocks (47) are integrally formed with the sleeve (40).

9. A trenchless pipeline repair device according to claim 7, characterized in that: The connecting block (48) is connected to the connecting rod (45) on both sides by bolts. The hinge rod is hinged between the inner walls of the hinge seat (43). The other end of the hinge rod is hinged to the hinge block. The other end of the connecting rod (45) is hinged to the connecting seat (491). The connecting seat (491) and the hinge block are located in the groove.

10. A trenchless pipeline repair device according to claim 6, characterized in that: The top of the mounting block (490) is connected to a repair expansion plate (492) by a screw. The repair expansion plate (492) has a semi-arc structure and is in contact with the inner wall of the pipe (1).

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