Pipeline repair equipment and pipeline replacement system

Abstract

The invention provides pipeline repairing equipment and a pipeline replacement system, and relates to the technical field of pipeline construction. The pipeline repairing equipment comprises a guiding device, a cutting device and a pipe eating device. When the steel belt corrugated pipe works, the cutting device longitudinally cuts an old pipeline, and then the old pipeline is transversely cut up and discharged through the spiral cutting assembly, so that a new pipeline can be conveniently placed in the position of the original pipeline along with the cutting device to complete replacement subsequently. And the method is especially suitable for complex working conditions needing overall replacement of the pipeline, such as deformation, small-amplitude collapse corrosion leakage and the like of multiple aged positions of the corrugated pipe.

Description

Technical Field

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

[0002] In the renovation and upgrading of urban pipe networks, some drainage pipes are made of (steel strip) double-wall corrugated pipe. They are widely used in residential areas and non-urban roads in the north, and are also widely used in the south. Many drainage pipes have varying degrees of damage, cracking, and severe deformation. Traditional open-cut pipe replacement technology has significant safety hazards, high costs, long construction periods, and a significant impact on traffic. Currently, there is very little research in the industry on trenchless repair technology for corrugated pipes. Corrugated pipes contain a steel strip base, so they have high ring stiffness, and it is difficult to break them with ordinary pipe expansion technology.

[0003] Currently, the main method for repairing this type of work is trenchless repair, which utilizes the principle of pipe expansion. Different shaped expansion heads are welded to cut the corrugated pipe, and traction force is used to break the corrugated pipe, followed by replacement with PE pipe. However, this technology carries certain risks, requiring a safe distance from adjacent pipelines and demanding high-performance tensioners and power sources (capable of cutting the corrugated pipe's steel strip). Engineering practice shows that a significant portion of the corrugated pipe, due to the high rigidity of the internal steel strip rings, cannot be broken easily, causing the corrugated pipe to accumulate, exceeding the tensile strength limit, and becoming stuck inside the pipe, requiring re-excavation and resulting in low repair efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a pipeline repair device to solve the technical problem that the existing technology of using traction force to break the corrugated pipe easily causes the corrugated pipe to accumulate and get stuck in the pipeline, resulting in low repair efficiency.

[0005] In view of the above objectives, the present application provides a pipeline repair device, including a guiding device, a cutting device, and a pipe-feeding device;

[0006] The guiding device is connected to the front end of the cutting device;

[0007] The cutting device includes a cutting fixing cover, a first driving assembly, and a cutting disc;

[0008] The first driving assembly is fixed inside one side of the cutting fixing cover or inside the guide device. At least two cutting blades are arranged inside the other side of the cutting fixing cover. The cutting fixing cover is provided with a cutting edge. The axis of the cutting blade is perpendicular to the axis of the pipe to be cut. The cutting blade is arranged vertically and at least the cutting edge extends through the cutting edge. The first driving assembly drives the cutting blade to rotate through the tool transmission assembly.

[0009] The tube-eating device includes a tube-eating sleeve, a spiral cutting assembly, a second drive assembly, and a transmission shaft assembly. The tube-eating sleeve is located at the rear of the cutting device. The second drive assembly is fixed to the end of the tube-eating sleeve away from the cutting device. One end of the transmission shaft assembly is rotatably connected to the end of the cutting fixing cover away from the guide device, and the other end is connected to the second drive assembly. The spiral cutting assembly is located inside the tube-eating sleeve and passes through the transmission shaft assembly so that the spiral cutting assembly can be driven to rotate by the transmission shaft assembly. The diameter of the tube-eating sleeve is larger than the diameter of the pipe to be cut.

[0010] Furthermore, the guide device is configured as a cone shape, with its front end diameter being smaller than its rear end diameter. The rear end of the guide device is connected to the front end of the cutting and fixing cover, and the front end of the guide device is used to connect to the pull rod of the pipe pulling equipment.

[0011] Furthermore, the tool transmission assembly includes a gear transmission box, the input end of which is connected to the first drive assembly via a shaft, and the two cutting discs are symmetrically arranged on both sides of the gear transmission box, with each cutting disc connected to the output end of the gear transmission box via a shaft.

[0012] Furthermore, the spiral cutting assembly includes a retaining sleeve and a plurality of cutting blades;

[0013] The fixing sleeve is inserted through the drive shaft assembly. The fixing sleeve is provided with spiral fixing blades extending along its length direction. Several cutting blades are evenly arranged on the outer edge of the fixing blades to radially cut the tube segments cut into strips by the cutting disc into sheet-like shapes.

[0014] Furthermore, several cutting blades are detachably connected to the outer edge of the fixed blade by bolts.

[0015] Furthermore, the inside of the tube-eating sleeve is provided with multiple long strip-shaped anti-pressure stationary blades, which are arranged around the circumference of the spiral cutting assembly.

[0016] Furthermore, it also includes a cylindrical underground casing and a third drive assembly;

[0017] The underground outer shell is located on the rear side of the tube-eating device. The third drive assembly is fixed inside the underground outer shell. A rotating disk is connected to the output shaft of the third drive assembly. The rotating disk is connected to the tube-eating sleeve through multiple fixed rods, thereby driving the tube-eating sleeve to rotate through the third drive assembly.

[0018] Several tunneling blades are provided on the front side of the tunneling sleeve.

[0019] Furthermore, a number of tunneling blades are evenly arranged in the circumferential direction of the front side of the casing sleeve, and the tunneling blades are detachably connected to the casing sleeve by bolts.

[0020] Secondly, this application provides a pipeline replacement system, including a pipe jacking machine, a pipe pulling machine, and the aforementioned pipeline repair equipment;

[0021] The two ends of the corrugated pipe to be replaced are connected between the first working well and the second working well;

[0022] The pipe jacking machine is located on one side of the bottom of the first working shaft, and the pipe pulling machine is located on one side of the bottom of the second working shaft;

[0023] The guide device of the pipeline repair device is connected to the pull rod of the pipe pulling machine. The pull rod pulls the pipeline repair device to move along the length of the corrugated pipe to be replaced, thereby cutting and breaking the corrugated pipe to be replaced.

[0024] The pipe jacking machine uses a jacking rod to push the new pipe along the pipe repair setup moving path and place it between the first working well and the second working well.

[0025] It also includes a hydraulic workstation for powering the pipe jacking and pipe pulling machines.

[0026] By adopting the above technical solution, the pipeline repair equipment provided in this application has the following technical advantages compared with the prior art:

[0027] 1. In the cutting device, the axis of the cutting disc is perpendicular to the axis of the pipe to be cut. The cutting disc is arranged vertically and at least the cutting edge extends out of the blade. The first drive component drives the cutting disc to rotate through the tool transmission component, thereby effectively cutting the pipe to be cut into at least 4 pieces.

[0028] 2. In the pipe-feeding device, the spiral cutting assembly is located inside the pipe-feeding sleeve and passes through the drive shaft assembly. The drive shaft assembly drives the spiral cutting assembly to rotate, further cutting at least four corrugated pipe segments laterally into strip-shaped fragments. Simultaneously, the fragments are conveyed and discharged into a new pipe through the continuous rotation of the spiral cutting assembly.

[0029] In summary, when operating steel corrugated pipes, the cutting device longitudinally cuts the old pipe, and then the spiral cutting component shreds and removes the old pipe laterally, facilitating the subsequent placement of the new pipe in the original pipe location to complete the replacement. This method is particularly suitable for complex situations where corrugated pipes have aged with multiple deformations, minor collapses, corrosion, and leaks, requiring complete pipe replacement. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the external structure of the pipeline repair equipment provided in Embodiment 1 of this application;

[0032] Figure 2 yes Figure 1 The left view;

[0033] Figure 3 This is a schematic diagram of the internal structure of the pipeline repair equipment provided in Embodiment 1 of this application (the pipe-eating sleeve and the underground outer shell are omitted).

[0034] Figure 4 This is a schematic diagram of the internal structure of the pipeline repair equipment provided in Embodiment 1 of this application (omitting the pipe-eating sleeve, the underground outer shell, and the cutting and fixing cover).

[0035] Figure 5 This is a schematic diagram of the pipe replacement system provided in Embodiment 2 of this application.

[0036] icon:

[0037] 1-Pipe jacking machine; 2-Pipe pulling machine; 3-Pipe repair equipment; 4-Corrugated pipe to be replaced; 5-First working shaft; 6-Second working shaft; 7-Hydraulic workstation;

[0038] 100-Guiding device; 200-Cutting device; 210-Cutting fixing cover; 211-Cutting edge; 220-First drive assembly; 221-Cut tool transmission assembly; 230-Cutting disc; 300-Throughing device; 310-Throughing sleeve; 311-Pressure-resistant stationary blade; 312-Tunneling blade; 320-Helical cutting assembly; 321-Fixing sleeve; 322-Cutting blade; 323-Fixing blade; 330-Second drive assembly; 340-Drive shaft assembly; 400-Earth-burrowing housing; 500-Third drive assembly; 510-Rotating disk; 520-Fixing rod. Detailed Implementation

[0039] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., 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 the invention and for simplifying the description, and do not 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] Example 1

[0043] like Figures 1 to 4 As shown in the figure, a pipe repair device provided in this application includes a guiding device 100, a cutting device 200, and a pipe-feeding device 300;

[0044] The guide device 100 is connected to the front end of the cutting device 200; the function of the guide device 100 is to connect with the pipe pulling machine 2, and the entire pipe repair equipment moves under the traction of the pipe pulling machine 2.

[0045] The cutting device 200 is used to cut the pipe laterally (i.e. along the length of the pipe). Specifically, the cutting device 200 includes a cutting fixing cover 210, a first driving assembly 220, and a cutting disc 230.

[0046] The first drive assembly 220 is fixed inside one side of the cutting fixing cover 210 or inside the guide device 100. At least two cutting discs 230 are arranged inside the other side of the cutting fixing cover 210. The cutting fixing cover 210 is provided with a cutting edge 211. The axis of the cutting disc 230 is perpendicular to the axis of the pipe to be cut. The cutting disc 230 is arranged vertically and at least the cutting edge extends through the cutting edge 211. In actual application, the diameter of the cutting disc 230 should be larger than the spiral length of the old pipe to be cut, so as to ensure that precise cutting can be achieved.

[0047] The first drive assembly 220 drives the cutting disc 230 to rotate through the tool transmission assembly 221, so that the cutting disc 230 can cut the pipe laterally into at least four pieces.

[0048] The tube-eating device 300 is located behind the cutting device 200. Specifically, the tube-eating device 300 includes a tube-eating sleeve 310, a spiral cutting assembly 320, a second drive assembly 330, and a drive shaft assembly 340. The tube-eating sleeve 310 is located behind the cutting device 200, and the diameter of the tube-eating sleeve 310 is larger than the diameter of the pipe to be cut. The second drive assembly 330 is fixed to the end of the tube-eating sleeve 310 away from the cutting device 200. One end of the drive shaft assembly 340 is rotatably connected to the end of the cutting fixing cover 210 away from the guide device 100, and the other end is connected to the second drive assembly 330. The spiral cutting assembly 320 is located inside the tube-eating sleeve 310 and passes through the drive shaft assembly 340. The second drive assembly 330 drives the drive shaft assembly 340 to rotate, thereby driving the spiral cutting assembly 320 to rotate, thereby further cutting and crushing the pipe after multi-lobed cutting.

[0049] 1. In the cutting device 200, the axis of the cutting disc 230 is perpendicular to the axis of the pipe to be cut. The cutting disc 230 is arranged vertically and at least the cutting edge extends out of the cutting edge 211. The first driving component 220 drives the cutting disc 230 to rotate through the tool transmission component 221, thereby effectively cutting the pipe to be cut into at least 4 pieces.

[0050] 2. In the pipe feeding device 300, the spiral cutting component 320 is located inside the pipe feeding sleeve 310, and the spiral cutting component 320 passes through the drive shaft assembly 340 so that the drive shaft assembly 340 drives the spiral cutting component 320 to rotate. The spiral cutting component 320 further cuts at least four corrugated pipes into strip-shaped fragments laterally. At the same time, the fragments are transported and discharged to the new pipe through the continuous rotation of the spiral cutting component 320.

[0051] In summary, during the operation of steel strip corrugated pipes, the cutting device 200 cuts the old pipe longitudinally, and then the spiral cutting component 320 cuts the old pipe laterally and discharges it, making it easier to subsequently place the new pipe into the original pipe position along with the cutting device 200 to complete the replacement. This is especially suitable for complex working conditions where corrugated pipes have aged and deformed in multiple places, with minor collapses, corrosion, and leakage, requiring the overall replacement of the pipe.

[0052] In the pipe repair equipment 3 provided in this embodiment, the guide device 100 is set in the shape of a cone, with its front end diameter being smaller than its rear end diameter. The rear end of the guide device 100 is connected to the front end of the cutting and fixing cover 210. The front end of the guide device 100 is used to connect the pull rod of the pipe pulling equipment. For example, the front end of the guide device 100 can be provided with a threaded hole to facilitate the threaded connection of the pull rod, thereby realizing movement under the traction of the pull rod.

[0053] In addition, the rear interior of the guide device 100 can be used to install the first drive assembly 220, which can be a hydraulic motor or an electric motor, preferably a hydraulic motor to provide driving force.

[0054] In the pipeline repair equipment 3 provided in this embodiment, the tool transmission assembly 221 includes a gear transmission box, which is fixed inside the cutting fixing cover 210. The input end of the gear transmission box is connected to the first drive assembly 220 via a shaft. Two cutting blades 230 are symmetrically arranged on both sides of the gear transmission box, and the two cutting blades 230 are respectively connected to the output end of the gear transmission box via shafts.

[0055] Specifically, the gear transmission box is equipped with a driving gear and a driven gear composed of bevel gears. The shaft of the driving gear is used to connect with the shaft of the first drive assembly 220. The two driven gears mesh with the driving gear respectively, and the shafts of the two driven gears are respectively connected to the corresponding cutting discs 230. In this scheme, the bevel gears are designed according to national standards to achieve a 90° rotation direction conversion. A certain transmission ratio is designed to increase the rotation speed of the cutter and achieve rapid cutting.

[0056] Reference Figure 3 and Figure 4 In the pipe repair equipment provided in this embodiment, four rectangular cutting edges 211 are cut on the cutting and fixing cover 210, and the four cutting edges 211 are symmetrically distributed along the circumference of the cylindrical cutting and fixing cover 210. The cutting disc 230 protrudes outward through the four rectangular cutting edges 211, and the diameter of the cutting disc 230 should be larger than the spiral length of the old pipe section to be cut, ensuring that the wall thickness of the old pipe can be completely cut. In addition, a sealing brush can be installed at the rectangular notch on the outside of the cutting and fixing cover 210 to effectively prevent soil and debris from entering the interior of the cutting and fixing cover 210.

[0057] Reference Figure 3 and Figure 4 In the pipe repair equipment provided in this embodiment, the spiral cutting assembly 320 includes a fixing sleeve 321 and a plurality of cutting blades 322;

[0058] The fixed sleeve 321 is mounted on the drive shaft assembly 340. The fixed sleeve 321 is provided with a spiral fixed blade 323 extending along its length direction. Several cutting blades 322 are evenly arranged on the outer edge of the fixed blade 323 to radially cut the strip-shaped tube segment cut by the cutting disc 230 into a sheet.

[0059] Preferably, a plurality of cutting blades 322 are detachably connected to the outer edge of the fixed blade 323 by bolts.

[0060] In this embodiment, the spiral cutting assembly 320 is driven by the second driving assembly 330, which can be a hydraulic motor or an electric motor. In this embodiment, a hydraulic motor is preferred. Several cutting blades 322 are installed at equal intervals on the edge of the spiral fixed blade 323 and connected by bolts for easy disassembly and replacement. When the fixed blade 323 drives the cutting blades 322 to rotate at high speed, the cutting blades 322 perform transverse cutting and hooking on the four-lobed pipe, thereby breaking up the old pipe and transporting the fragments into the new pipe.

[0061] In this embodiment, the inside of the pipe-eating sleeve 310 is provided with multiple elongated anti-compression stationary blades 311, which are arranged around the circumference of the spiral cutting assembly 320. The anti-compression stationary blades 311, when used in conjunction with the spiral cutting assembly 320, can perform combined compression cutting on multi-segment pipes, thereby breaking up old pipes.

[0062] The pipeline repair equipment provided in this embodiment also includes a cylindrical underground housing 400 and a third drive assembly 500;

[0063] The underground housing 400 is located at the rear of the tube-eating device 300. The third drive assembly 500 is fixed inside the underground housing 400. The third drive assembly 500 can be a hydraulic motor. A rotating disk 510 is connected to the output shaft of the third drive assembly 500. The rotating disk 510 is connected to the tube-eating sleeve 310 through multiple fixing rods 520, thereby driving the tube-eating sleeve 310 to rotate through the third drive assembly 500. In addition, several tunneling blades 312 are provided on the front side of the tube-eating sleeve 310.

[0064] Preferably, a plurality of tunneling blades 312 are evenly arranged on the front circumference of the casing sleeve 310, and the tunneling blades 312 and the casing sleeve 310 are detachably connected by bolts, facilitating the replacement of the tunneling blades 312. In practical applications, the tunneling blades 312 should have high hardness, high wear resistance and impact toughness to ensure that the cutting blades do not jam when running in the slot and are easy to disassemble.

[0065] In this design, the inner diameter of the pipe-eating sleeve 310 is relatively large, exceeding the outer diameter of the old pipe. This allows it to completely enclose the old pipe, achieving the purpose of diameter expansion and replacement. The front end of the pipe-eating sleeve 310 is equipped with a tunneling blade 312. During pipe-eating, the sleeve 310 drives the tunneling blade 312 to rotate, significantly reducing resistance. Furthermore, the tunneling blade 312 is bolted to the sleeve 310, facilitating replacement and improving work efficiency.

[0066] Example 2

[0067] like Figure 5As shown, this embodiment provides a pipeline replacement system, including a pipe jacking machine 1, a pipe pulling machine 2, and the pipeline repair equipment 3 described in Embodiment 1 above;

[0068] The two ends of the corrugated pipe 4 to be replaced are connected between the first working well 5 and the second working well 6.

[0069] The pipe jacking machine 1 is located on one side of the bottom of the first working shaft 5, and the pipe pulling machine 2 is located on one side of the bottom of the second working shaft 6;

[0070] The guide device 100 of the pipeline repair equipment 3 is connected to the pull rod of the pipe pulling machine 2. The pipeline repair equipment 3 is moved along the length of the corrugated pipe 4 to be replaced by the pull rod, thereby cutting and crushing the corrugated pipe 4 to be replaced.

[0071] The pipe jacking machine 1 uses a jacking rod to push the new pipe along the moving path of the pipe repair equipment 3 and insert it between the first working well 5 and the second working well 6.

[0072] It should be noted that since the pipe jacking machine 1 and the pipe pulling machine 2 are existing technologies, their structures and working principles will not be described in detail in this embodiment.

[0073] In this embodiment, a hydraulic workstation 7 is also included, which is used to provide power to the pipe jacking machine 1 and the pipe pulling machine 2.

[0074] Specifically, the pipe pulling machine 2 is connected to the hydraulic workstation 7, generating power to drive the pull rod. In practical applications, parameters such as cylinder capacity, stroke, and sealing performance need to be considered. The cylinder of the pipe pulling machine 2 is the actuator, driving the piston rod to extend and retract through hydraulic oil pressure. The pull rod is connected to the piston rod of the jacking cylinder to transmit force. These two parts work together to form an effective jacking force to complete the pipe pulling and cutting operations, and the jacking operation of the pipe-feeding device 300. The maximum jacking force is 60t, the maximum jacking speed is 0.2m / min, and the minimum working space length is ≥1000mm.

[0075] The pipe jacking machine 1, also commonly known as the jacking cylinder, is the main power source for pipe section advancement, used to push new pipe sections forward during construction. Its drive relies on the hydraulic workstation 7, which sends hydraulic oil into the rodless or rod chamber of the cylinder via a control valve group, pushing the piston rod to extend or retract, thereby generating thrust. The thrust and speed of the jacking cylinder can be precisely controlled by adjusting the pressure and flow rate of the hydraulic system. The maximum thrust is 60t, the maximum torque is 12000nm, the maximum jacking speed is 0.5m / min, and the maximum rotation speed is 10r / min.

[0076] The application principle of the pipeline replacement system provided in this embodiment is explained below:

[0077] The tie rod machine in the second working shaft 6 is connected to the guide device 100 of the pipeline repair equipment 3 by tie rods and pulls forward. In order to ensure that the whole equipment operates in the center of the pipeline, the whole equipment is guided by the guide instrument and the guide device 100 during the construction process.

[0078] The external pipe-eating sleeve 310 is driven to rotate by a hydraulic motor. The cutting action of the tunneling blade 312 feeds the old pipe into the pipe-eating device 300. The hydraulic motor drives the gearbox to rotate, which in turn drives the two longitudinally arranged cutting discs 230 to rotate. While the guide device 100 moves along the pipe axis, the cutting discs 230 apply extrusion and shearing forces to the corrugated pipe to achieve longitudinal cutting, cutting the corrugated pipe longitudinally into 4 pieces.

[0079] As the overall device moves forward, the corrugated pipe, which has been cut into four pieces, enters the spiral cutting assembly 320. Several cutting blades 322 are connected to the edge of the fixed blade 323 in the spiral cutting assembly 320. In combination with the pressure-resistant stationary blade 311, the cutting blades 322 hook and rotate to cut the corrugated pipe again, further cutting the corrugated pipe into strip-shaped fragments laterally. The fragments are conveyed and discharged to the new pipeline through the continuous rotation of the spiral cutting assembly 320.

[0080] A pipe jacking machine 1 is installed in the second working shaft 6. The pipe jacking machine 1 pushes the new pipe section by section forward to gradually replace the old pipe. During the jacking process, the jacking speed and direction are controlled to avoid excessive disturbance to the soil around the pipe. After the new pipe is completely laid, the connection with the pipe jacking machine 1 is disconnected to complete the pipe replacement.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipeline repair device, characterized in that, Includes guiding devices, cutting devices, and feeding devices; The guiding device is connected to the front end of the cutting device; The cutting device includes a cutting fixing cover, a first driving assembly, and a cutting disc; The first driving assembly is fixed inside one side of the cutting fixing cover or inside the guide device. At least two cutting blades are arranged inside the other side of the cutting fixing cover. The cutting fixing cover is provided with a cutting edge. The axis of the cutting blade is perpendicular to the axis of the pipe to be cut. The cutting blade is arranged vertically and at least the cutting edge extends through the cutting edge. The first driving assembly drives the cutting blade to rotate through the tool transmission assembly. The tube-eating device includes a tube-eating sleeve, a spiral cutting assembly, a second drive assembly, and a transmission shaft assembly. The tube-eating sleeve is located at the rear of the cutting device. The second drive assembly is fixed to the end of the tube-eating sleeve away from the cutting device. One end of the transmission shaft assembly is rotatably connected to the end of the cutting fixing cover away from the guide device, and the other end is connected to the second drive assembly. The spiral cutting assembly is located inside the tube-eating sleeve and passes through the transmission shaft assembly so that the spiral cutting assembly can be driven to rotate by the transmission shaft assembly. The diameter of the tube-eating sleeve is larger than the diameter of the pipe to be cut.

2. The pipeline repair equipment according to claim 1, characterized in that, The guide device is configured as a cone shape, with its front end diameter being smaller than its rear end diameter. The rear end of the guide device is connected to the front end of the cutting and fixing cover, and the front end of the guide device is used to connect to the pull rod of the pipe pulling equipment.

3. The pipeline repair equipment according to claim 1, characterized in that, The tool transmission assembly includes a gear transmission box. The input end of the gear transmission box is connected to the first drive assembly via a shaft. The two cutting discs are symmetrically arranged on both sides of the gear transmission box, and the two cutting discs are respectively connected to the output end of the gear transmission box via shafts.

4. The pipeline repair equipment according to claim 1, characterized in that, The spiral cutting assembly includes a retaining sleeve and several cutting blades; The fixing sleeve is inserted through the drive shaft assembly. The fixing sleeve is provided with spiral fixing blades extending along its length direction. Several cutting blades are evenly arranged on the outer edge of the fixing blades to radially cut the tube segments cut into strips by the cutting disc into sheet-like shapes.

5. The pipeline repair equipment according to claim 4, characterized in that, Several cutting blades are detachably connected to the outer edge of the fixed blade by bolts.

6. The pipeline repair equipment according to claim 4, characterized in that, The inside of the tube-eating sleeve is provided with multiple long, pressure-resistant stationary blades, which are arranged around the circumference of the spiral cutting assembly.

7. The pipeline repair equipment according to claim 1, characterized in that, It also includes a cylindrical underground casing and a third drive assembly; The underground outer shell is located on the rear side of the tube-eating device. The third drive assembly is fixed inside the underground outer shell. A rotating disk is connected to the output shaft of the third drive assembly. The rotating disk is connected to the tube-eating sleeve through multiple fixed rods, thereby driving the tube-eating sleeve to rotate through the third drive assembly. Several tunneling blades are provided on the front side of the tunneling sleeve.

8. The pipeline repair equipment according to claim 7, characterized in that, Several tunneling blades are evenly arranged in the circumferential direction of the front side of the casing sleeve, and the tunneling blades are detachably connected to the casing sleeve by bolts.

9. A pipe replacement system, characterized in that, Includes pipe jacking machines, pipe pulling machines, and the pipeline repair equipment described in any one of claims 1-8; The two ends of the corrugated pipe to be replaced are connected between the first working well and the second working well; The pipe jacking machine is located on one side of the bottom of the first working shaft, and the pipe pulling machine is located on one side of the bottom of the second working shaft; The guide device of the pipeline repair device is connected to the pull rod of the pipe pulling machine. The pull rod pulls the pipeline repair device to move along the length of the corrugated pipe to be replaced, thereby cutting and breaking the corrugated pipe to be replaced. The pipe jacking machine uses a jacking rod to push the new pipe along the pipe repair setup moving path and place it between the first working well and the second working well.

10. The pipeline replacement system according to claim 9, characterized in that, It also includes a hydraulic workstation for powering the pipe jacking and pipe pulling machines.

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