Pipeline trenchless laser cutting updating device and updating method thereof

Abstract

The application discloses a pipeline trenchless laser cutting updating device and an updating method thereof, and solves the problems of easy damage of a blade and great difficulty in cutter replacement in a blade type pipeline cutting device in the prior art. The pipeline trenchless laser cutting updating device comprises a traction system arranged in a second working well, and a laser cutting mechanism and an expansion jacking mechanism which are connected in front and back and start from a first working well; a towing device for towing a new pipeline is arranged at the rear of the expansion jacking mechanism; under the action of the traction system, the laser cutting mechanism, the expansion jacking mechanism and the towing device move in an old pipeline and perform laser cutting of the old pipeline, expansion of the old pipeline and laying of the new pipeline. The application can effectively cut a flexible pipeline, lay a new expanded pipeline, has the characteristics of not affecting ground traffic, small ground disturbance, environmental friendliness and the like, and can realize in-situ updating and expansion updating of the flexible pipeline.

Description

Technical Field

[0001] This invention relates to the field of underground engineering pipeline renovation technology, and in particular to a trenchless laser cutting renovation device and its renovation method. Background Technology

[0002] The renovation of aging underground pipelines is a phased task in social development. Currently, most pipeline renovation technologies use the open-cut method, which requires large-scale enclosure during construction, severely impacting traffic. Surrounding buildings and landscapes also affect the implementation of the open-cut method.

[0003] The commonly used trenchless replacement method for flexible pipelines is the pipe-cutting (splitting) method, which typically uses blades to cut the pipe, as illustrated in the pipe-cutting and pipe-swallowing replacement device disclosed in CN 110919290 B, which uses cutting tools for this purpose. However, this design often results in blade damage due to the influence of the pipeline and surrounding backfill material. This increases blade wear and makes blade replacement difficult, thus affecting the efficiency of pipeline replacement. Therefore, it is necessary to design a new trenchless replacement device and method. Summary of the Invention

[0004] To address the shortcomings in the aforementioned background technology, this invention proposes a trenchless laser cutting and replacement device and method for pipelines, which solves the problems of easy blade breakage and difficulty in tool replacement in existing blade-type pipeline cutting devices.

[0005] The technical solution of the present invention is implemented as follows: a trenchless laser cutting and replacement device for pipelines includes a traction system installed in a second working shaft and a laser cutting mechanism and an expansion jacking mechanism that start from a first working shaft and are connected to each other. The expansion jacking mechanism is provided with a traction device for pulling new pipelines at the rear. Under the action of the traction system, the laser cutting mechanism, the expansion jacking mechanism and the traction device move in the old pipeline and perform laser cutting of the old pipeline, expansion of the old pipeline and laying of new pipelines.

[0006] In a further preferred embodiment, the laser cutting mechanism includes a front chamber, a sludge removal component is provided at the front of the front chamber, and a laser cutting head is provided on the outer wall of the rear of the front chamber, with the laser cutting head corresponding to the sludge removal component; the laser cutting head is connected to a laser disposed in the front chamber.

[0007] In a further preferred embodiment, the dredging assembly includes a scraper brush and a high-pressure water nozzle mounted on the outer wall of the front of the forebody, with the high-pressure water nozzle connected to a water supply device mounted inside the forebody.

[0008] In a further preferred embodiment, the high-pressure water nozzles are disposed on the front and rear sides of the scraper brush, and the scraper brush is disposed in a corresponding manner to the laser cutting head.

[0009] More preferably, the front compartment includes a front conical head and a cylinder that are fixedly connected, and at least one sealing ring is embedded at the connection between the front conical head and the cylinder.

[0010] In a further preferred embodiment, the expansion jacking mechanism includes a rear compartment, with a forward wheel embedded in the conical outer wall of the rear compartment. The forward wheel is connected to a drive motor through a transmission mechanism located within the rear compartment, and a towing device connected to the new pipeline is provided at the rear of the rear compartment.

[0011] Further preferably, the rear compartment is a tapered, expanded-diameter compartment, with the minimum outer diameter of the tapered, expanded-diameter compartment being greater than or equal to the maximum outer diameter of the front compartment; the front part of the rear compartment is formed into a front compartment by a front bulkhead and a rear bulkhead, the transmission mechanism is located in the front compartment, and the drive motor is fixed on the rear bulkhead.

[0012] Further preferably, the front compartment is provided with an inner positioning ring and an outer positioning ring arranged coaxially; the transmission mechanism includes a transmission shaft arranged in the inner positioning ring and a gear shaft passing through the inner positioning ring and the outer positioning ring, the transmission shaft is provided with a drive gear, one end of the gear shaft is provided with a turbine part or a bevel gear part, and the other end is provided with a driving pinion, the turbine part or bevel gear part meshes with the drive gear, and the axle of the forward wheel is provided with a driven pinion, the driving pinion meshes with the driven pinion.

[0013] Further preferably, the towing device includes a fixed connector located at the rear of the rear compartment, the fixed connector being provided with a pipe clamp for clamping and securing the new pipe from the end or a telescopic fixing member for supporting and fixing from inside the pipe; the traction system includes a winch, the traction rope on the winch being connected to the laser cutting mechanism and the expansion jacking mechanism.

[0014] A method for updating a trenchless laser cutting and updating device for pipelines includes the following steps: S1: Excavate a first working well and a second working well at both ends of the updated pipeline area, and reinforce the openings at the intersections of the first working well and the old pipeline's pipe hole, as well as at the intersections of the second working well and the old pipeline's pipe hole, to form a hole reinforcement beam. S2: A laser cutting mechanism, an expansion jacking mechanism, and a new pipeline are installed in the first working shaft. A traction system is installed in the second working shaft. An external power supply system is installed outside the working shaft and connected to the corresponding laser cutting mechanism and expansion jacking mechanism. S3: Start the trenchless laser cutting and upgrading device for the pipeline. The sludge removal component at the front of the front compartment cleans the inside of the old pipeline to provide a suitable cutting environment for the laser cutting head. Then, the laser cutting head performs axial laser cutting on the cleaned old pipeline under the action of the laser. S4: The expansion jacking mechanism enters the cut old pipe under the action of the traction system, and at the same time supports the old pipe to expand its diameter; depending on the working conditions, the forward wheel on the expansion jacking mechanism rotates under the action of the drive motor to provide auxiliary power for the jacking of the expansion jacking mechanism. S5: While the expansion jacking mechanism is jacking, the new pipeline enters the expanded old pipeline from the opening of the first working shaft under the action of the dragging device. S6: Repeat steps S3~S4 until the new pipeline reaches the second working shaft, completing the pipeline update under trenchless conditions; S7: Dismantle the traction system, laser cutting mechanism, and expansion jacking mechanism, and seal the entrances to the first and second working shafts.

[0015] The beneficial effects of this invention are as follows: 1. Compared with the prior art, the device and method of this invention solve the problems of large-area enclosure required during construction, which affects traffic, and the inability to carry out open-cut work due to existing buildings and structures. 2. This invention uses laser cutting of old pipelines, avoiding the problems of tool wear and the difficulty of replacing underground tools in existing pipe cutting (splitting) methods; in addition, in conjunction with a dredging mechanism, it ensures the effectiveness and high precision of laser cutting, improving cutting efficiency. 3. The expansion jacking mechanism of this invention uses a forward wheel to jack the pipeline for auxiliary jacking, avoiding the problem of the traction rope breaking due to long distance, high friction, and friction between the traction rope and the pipe wall in the pipe bending section during the dragging process of the replacement device, causing the device to be stuck in the pipeline, thus further improving construction safety. 4. This method can effectively cut flexible pipelines and lay new expanded diameter pipelines, with the characteristics of not affecting ground traffic, minimal ground disturbance, and environmental friendliness, and can realize in-situ renewal and expansion renewal of flexible pipelines. Attached Figure Description

[0016] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall construction status of the present invention.

[0018] Figure 2 This is a schematic diagram of the updating device structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the expansion jacking mechanism.

[0020] Figure 4 This is a schematic diagram showing the engagement state of the drive gear and the gear shaft.

[0021] Figure 5 A schematic diagram of fixing the pipe end for the towing mechanism.

[0022] Figure 6 A schematic diagram of the internal fixing of the pipeline for the towing mechanism.

[0023] Figure 7 This is a schematic diagram of the cross-section of the first working shaft entrance.

[0024] Figure 8 This is a schematic diagram of the cross-section of the second working shaft entrance. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figure 1 , 2 As shown in Embodiment 1, a trenchless laser cutting and replacement device for pipelines includes a traction system 6 installed in a second working shaft 3 and a laser cutting mechanism 8 and a capacity-expanding jacking mechanism 11 that originate from and are connected to each other in a first working shaft 2. The traction system provides the main power for the laser cutting mechanism 8 and the capacity-expanding jacking mechanism 11 to move forward. The laser cutting mechanism 8 uses a laser to cut the old pipeline, and the capacity-expanding jacking mechanism 11 is used to support and expand the diameter of the cut old pipeline, further realizing capacity expansion. In this embodiment, a towing device 12 for towing a new pipeline 14 is provided at the rear of the capacity-expanding jacking mechanism. The towing device is used to fix the new pipeline. Under the action of the traction system or the capacity-expanding jacking mechanism 11, the new pipeline is towed into the cut old pipeline, realizing a nested pipeline replacement. Under the action of the traction system 6, the laser cutting mechanism, the expansion and jacking mechanism and the towing device 12 move inside the old pipeline 13 and perform laser cutting of the old pipeline, expansion of the old pipeline and laying of the new pipeline 14; the above-mentioned renewal device uses laser cutting of flexible pipeline, which avoids the problems of tool breakage caused by cutting the pipeline and difficulty in replacing underground tools; during the advancement of the renewal device, the old pipeline is expanded and the new pipeline is laid, which improves the quality and efficiency of pipeline renewal.

[0027] In this embodiment, a further preferred embodiment is provided, wherein the laser cutting mechanism 8 includes a front chamber 30, which is a hollow structure and serves as the main carrier of the laser cutting mechanism. A sludge removal component 15 is provided at the front of the front chamber 30, used to sludge the inner wall of the old pipe, facilitating the cutting of the laser cutting head 18 and the smooth advancement of the expansion jacking mechanism. A laser cutting head 18 is provided on the rear outer wall of the front chamber 30, corresponding to the sludge removal component 15 to ensure that the pipe wall surface cut by the laser cutting head 18 is a clean pipe wall after being cleaned by the sludge removal component 15, ensuring the effectiveness and efficiency of the cutting. The laser cutting head 18 is connected to a laser 29 disposed within the front chamber 30, and the laser emitted by the laser 29 is focused into a high-power-density laser beam by the laser cutting head. The laser beam irradiates the inner surface of the old pipe, causing the old pipe to reach its melting point. As the relative position of the beam and the old pipe moves, a cut is eventually formed in the old pipe, thus achieving the cutting purpose.

[0028] like Figure 2 As shown in Embodiment 2, a trenchless laser cutting and regeneration device for pipelines is further optimized based on Embodiment 1. As a preferred embodiment, the sludge removal component 15 includes a scraper brush 15-1 and a high-pressure water nozzle 16 mounted on the outer wall of the front of the front chamber 30. The scraper brush 15-1 is embedded in the outer wall of the front chamber 30 to ensure effective contact with the inner wall of the old pipeline, effectively scraping away sludge and debris during operation. The high-pressure water nozzle 16 is connected to a water supply device 28 located within the front chamber 30; the water supply device 28 can use a high-pressure water tank to provide high-pressure water to the high-pressure water nozzle 16, enabling timely cleaning of the old pipe wall and the scraper brush.

[0029] As a preferred embodiment, the high-pressure water nozzles 16 are positioned on both the front and rear sides of the scraper brush 15-1, ensuring that the high-pressure water ejected by the nozzles 16 can effectively clean the scraper brush and the inner wall of the old pipe. The scraper brush can be a ring-shaped structure plate or a block-shaped structure plate. When using a block-shaped structure plate, the scraper brush is installed at a fixed point on the front chamber, ensuring that the scraper brush 15-1 and the laser cutting head 18 are positioned correspondingly, so that the scraping path of the scraper brush 15-1 coincides with the cutting path of the laser cutting head 18, ensuring the effectiveness of the laser cutting head 18's cutting. Preferably, the front chamber 30 includes a fixedly connected front conical head 301 and a cylinder 302. The sludge removal component 15 is preferably positioned on the conical surface of the front conical head 301, ensuring effective contact with the old pipe. At least one sealing ring 17 is embedded at the connection between the front conical head 301 and the cylinder 302. The sealing ring 17 can be a rubber sealing ring. The rubber sealing ring enters the pipe to prevent sewage backflow on the pipe wall and provides an environment and space for laser cutting.

[0030] Example 3: A trenchless laser cutting and regeneration device for pipelines. This example is a further optimization based on Example 1 or 2. As a preferred embodiment, the expansion jacking mechanism 11 includes a rear compartment 31. A forward wheel 19 is embedded in the conical outer wall of the rear compartment 31. The forward wheel 19 is connected to a drive motor 20 via a transmission mechanism located within the rear compartment 31, forming an auxiliary power mechanism. This auxiliary power mechanism assists the expansion jacking mechanism 11 in further jacking, which is particularly suitable for regeneration of curved pipelines, reducing friction with the pipe wall and improving traction. A towing device 12, connected to the new pipeline 14, is located at the rear of the rear compartment 31. The towing device can be directly connected to the rear compartment 31 or connected to a traction system via a towing rope. In this example, the towing device is directly connected to the rear compartment 31.

[0031] As a preferred embodiment, the rear compartment 31 is a tapered, expanded-diameter compartment, which facilitates the gradual expansion of the cut old pipe. The minimum outer diameter of the tapered, expanded-diameter compartment is greater than or equal to the maximum outer diameter of the front compartment 30. In this embodiment, the rear compartment 31 and the front compartment 30 are directly connected and move synchronously under the action of the traction system. The front part of the rear compartment 31 forms a front compartment through a front bulkhead 27 and a rear bulkhead 26. The transmission mechanism is located in the front compartment, which provides sealing protection for the transmission mechanism of the sealed compartment. The drive motor 20 is fixed on the rear bulkhead 26. The drive motor 20 drives the forward wheel 19 to rotate through the transmission mechanism.

[0032] like Figure 3 , 4 As shown, in this embodiment, the front compartment is provided with an inner positioning ring 25 and an outer positioning ring 24 arranged coaxially; the inner positioning ring 25 and the outer positioning ring 24 provide support for the transmission mechanism. Preferably, the transmission mechanism includes a drive shaft 21 disposed within the inner positioning ring 25 and a gear shaft 23 passing through the inner positioning ring 25 and the outer positioning ring 24. Both ends of the drive shaft 21 are rotatably mounted on the front and rear partitions via bearings. The gear shaft 23 is rotatably connected to the inner positioning ring 25 and the outer positioning ring 24 via bearings. The drive shaft 21 is provided with a drive gear 22, and one end of the gear shaft 23 is provided with a turbine or bevel gear, and the other end is provided with a driving pinion 32. The turbine or bevel gear meshes with the drive gear 22, and the axle of the forward wheel 19 is provided with a driven pinion 33, which meshes with the driving pinion 32. The driving pinion 32 and the driven pinion 33 can be a bevel gear pair to achieve a change in steering. During operation, the drive motor 20 drives the transmission shaft 21 to rotate, and the drive gear 22 drives the gear shaft 23 to rotate through the turbine or bevel gear section, while changing the direction of rotation. Then, under the action of the driving pinion 32, it drives the driven pinion 33 to rotate, thereby realizing the rotation of the forward wheel 19. The number of forward wheels 19 can be set multiple as needed to achieve effective contact with the old pipeline and provide auxiliary power for the expansion jacking mechanism 11.

[0033] like Figure 5 , 6 As shown, in this embodiment, the towing device 12 includes a fixed connector 12-1 located at the rear of the rear compartment 31 for connecting to the new pipeline. Preferably, the fixed connector 12-1 is provided with a pipe clamp 12-2 for clamping and securing the new pipeline 14 from the end, or a telescopic fixing member 12-3 for supporting and fixing from the inside of the pipeline. When it is necessary to clamp and secure the new pipeline from the end, it can be clamped by a clamp or pipe clamp. When it is necessary to fix it from the inside of the new pipeline 14, the telescopic fixing member 12-3, such as a hydraulic support shoe or a telescopic X-frame, can be used to support and fix it from the inside of the pipeline, ensuring that the new pipeline can move with the rear compartment under the action of the towing device. As a further preferred embodiment, the towing system 6 includes a winch, and the towing rope 9 on the winch is connected to the laser cutting mechanism 8 and the expansion and jacking mechanism 11 to provide them with traction force.

[0034] Example 4: A method for updating a trenchless laser cutting and updating pipeline as described in Examples 1, 2, or 3, comprising the following steps: S1: Excavating a first working shaft 2 and a second working shaft 3 at both ends of the updated pipeline area 1. Both the first and second working shafts are vertical shaft structures. Reinforcing beams 7 are formed at the intersections of the first working shaft 2 and the old pipeline 13, and at the intersections of the second working shaft 3 and the old pipeline 13. Figure 7 , 8 As shown.

[0035] S2: A laser cutting mechanism 8, an expansion jacking mechanism 11, and a new pipeline 14 are installed in the first working shaft 2. A traction system 6 is installed in the second working shaft 3. An external power supply system 4 is installed outside the working shafts and connected to the corresponding laser cutting mechanism 8 and expansion jacking mechanism 11. Specifically, traction ropes and cables are passed through the old pipeline using equipment such as remote-controlled vehicles and robots. The corresponding traction ropes and cables are connected to the replacement device and connected to the power supply system via cable 5.

[0036] S3: The trenchless laser cutting and upgrading device for the pipeline is activated. The sludge removal component 15 at the front of the front chamber 30 cleans the inside of the old pipeline, providing a suitable cutting environment for the laser cutting head 18. Then, the laser cutting head 18 performs axial laser cutting on the cleaned old pipeline 13 under the action of the laser. During this process, the sealing ring 17 on the front chamber 30 can be a rubber sealing ring. The rubber sealing ring enters the pipeline to prevent sewage backflow on the pipe wall, providing an environment and space for laser cutting.

[0037] S4: The expansion jacking mechanism 11 enters the cut old pipe under the action of the traction system 6, and simultaneously supports the old pipe to expand its diameter; depending on the working conditions, the auxiliary advancing device is activated at the bend section and other parts to provide power for pipe renewal; the advancing wheel 19 on the expansion jacking mechanism 11 rotates under the action of the drive motor to provide auxiliary power for the jacking of the expansion jacking mechanism 11. S5: While the expansion jacking mechanism 11 is jacking, the new pipeline 14, under the action of the towing device 12, enters the expanded old pipeline from the opening of the first working shaft 2; completing the installation and renewal of the new pipeline into the old pipeline.

[0038] S6: Repeat steps S3~S4 until the new pipeline 14 reaches the second working shaft 3, completing the pipeline update under trenchless conditions; S7: Remove the traction system 6, laser cutting mechanism 8, and expansion jacking mechanism 11, and seal the entrances to the first working shaft 2 and the second working shaft 3.

[0039] The aforementioned method for updating pipelines using trenchless laser cutting can expand the capacity of old pipelines to a certain extent. At the same time, it solves the problem of traffic disruption caused by the need for large-scale enclosure during construction in existing open-cut technology, and also solves the problem of easy damage and difficulty in replacing cutting blades during excavation, thus further improving construction efficiency.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A trenchless laser cutting and regeneration device for pipelines, characterized in that: It includes a traction system (6) installed in the second working shaft (3) and a laser cutting mechanism (8) and an expansion jacking mechanism (11) that start from the first working shaft (2) and are connected to each other. The expansion jacking mechanism is equipped with a jacking device (12) for pulling the new pipeline (14) at the rear. Under the action of the traction system (6), the laser cutting mechanism, the expansion jacking mechanism and the jacking device (12) move in the old pipeline (13) and perform laser cutting of the old pipeline, expansion of the old pipeline and laying of the new pipeline (14). The laser cutting mechanism (8) includes a front compartment (30), a sludge removal component (15) is provided at the front of the front compartment (30), and a laser cutting head (18) is provided on the outer wall of the rear of the front compartment (30). The laser cutting head (18) corresponds to the sludge removal component (15) in front and back. The laser cutting head (18) is connected to a laser (29) provided in the front compartment (30). The dredging assembly (15) includes a scraper brush (15-1) and a high-pressure water nozzle (16) installed on the outer wall of the front of the front compartment (30). The high-pressure water nozzle (16) is connected to a water supply device (28) installed in the front compartment (30).

2. The trenchless laser cutting and regeneration device for pipelines according to claim 1, characterized in that: The high-pressure water nozzle (16) is set on the front and rear sides of the scraper brush (15-1), and the scraper brush (15-1) is set in a corresponding manner to the laser cutting head (18).

3. The trenchless laser cutting and regeneration device for pipelines according to claim 1 or 2, characterized in that: The front compartment (30) includes a front conical head (301) and a cylinder (302) that are fixedly connected, and at least one sealing ring (17) is embedded at the connection between the front conical head (301) and the cylinder (302).

4. The trenchless laser cutting and regeneration device for pipelines according to claim 3, characterized in that: The expansion jacking mechanism (11) includes a rear compartment (31), and a forward wheel (19) is embedded on the conical outer wall of the rear compartment (31). The forward wheel (19) is connected to the drive motor (20) through a transmission mechanism located in the rear compartment (31). The rear of the rear compartment (31) is provided with a towing device (12) connected to the new pipeline (14).

5. The trenchless laser cutting and regeneration device for pipelines according to claim 4, characterized in that: The rear compartment (31) is a tapered expanded diameter compartment, and the minimum outer diameter of the tapered expanded diameter compartment is greater than or equal to the maximum outer diameter of the front compartment (30). The front part of the rear compartment (31) forms a front compartment through the front bulkhead (27) and the rear bulkhead (26). The transmission mechanism is set in the front compartment, and the drive motor (20) is fixed on the rear bulkhead (26).

6. The trenchless laser cutting and regeneration device for pipelines according to claim 4 or 5, characterized in that: The front compartment is provided with an inner positioning ring (25) and an outer positioning ring (24) arranged on the same axis; the transmission mechanism includes a transmission shaft (21) arranged in the inner positioning ring (25) and a gear shaft (23) passing through the inner positioning ring (25) and the outer positioning ring (24). The transmission shaft (21) is provided with a drive gear (22). One end of the gear shaft (23) is provided with a worm gear or bevel gear and the other end is provided with a driving pinion (32). The worm gear or bevel gear meshes with the drive gear (22). The axle of the forward wheel (19) is provided with a driven pinion (33). The driving pinion (32) meshes with the driven pinion (33).

7. The trenchless laser cutting and regeneration device for pipelines according to claim 6, characterized in that: The towing device (12) includes a fixed connector (12-1) located at the rear of the rear compartment (31). The fixed connector (12-1) is provided with a pipe clamp (12-2) for clamping and securing the new pipe (14) from the end or a telescopic fixing member (12-3) for supporting and fixing from the inside of the pipe. The traction system (6) includes a winch. The traction rope (9) on the winch is connected to the laser cutting mechanism (8) and the expansion jacking mechanism (11).

8. A method for updating a trenchless laser cutting update device for pipelines as described in any one of claims 1 to 7, characterized in that: The steps are as follows: S1: Excavate the first working well (2) and the second working well (3) at both ends of the updated pipeline area (1), and reinforce the opening to form a reinforcement beam (7) at the intersection of the pipe hole of the first working well (2) and the old pipeline (13) and the pipe hole of the second working well (3) and the old pipeline (13). S2: A laser cutting mechanism (8), an expansion jacking mechanism (11) and a new pipeline (14) are installed in the first working shaft (2), a traction system (6) is installed in the second working shaft (3), and an external power supply system (4) is installed outside the working shaft and connected to the corresponding laser cutting mechanism (8) and expansion jacking mechanism (11). S3: Start the trenchless laser cutting and replacement device for the pipeline. The sludge removal component (15) at the front of the front chamber (30) cleans the inside of the old pipeline, providing a suitable cutting environment for the laser cutting head (18). Then, the laser cutting head (18) performs axial laser cutting on the cleaned old pipeline (13) under the action of the laser. S4: The expansion jacking mechanism (11) enters the cut old pipe under the action of the traction system (6) and supports the old pipe to realize the expansion of the old pipe diameter; according to the working conditions, the forward wheel (19) on the expansion jacking mechanism (11) rotates under the action of the drive motor to provide auxiliary power for the jacking of the expansion jacking mechanism (11); S5: While the expansion jacking mechanism (11) is jacking, the new pipeline (14) enters the expanded old pipeline from the opening of the first working shaft (2) under the action of the dragging device (12); S6: Repeat steps S3~S4 until the new pipeline (14) reaches the second working shaft (3) to complete the pipeline update under trenchless conditions; S7: Remove the traction system (6), laser cutting mechanism (8), and expansion jacking mechanism (11) to seal the entrances of the first working shaft (2) and the second working shaft (3).

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