A cutting device and processing method for cable protection pipe plastic pipe

Abstract

This invention discloses a cutting device and processing method for plastic pipes used in cable protection conduits, relating to the field of cutting equipment technology. It includes a ring-shaped main body mechanism comprising two interlocking ring-shaped shells, each with a wear-resistant nylon inner protective layer on its inner side. A side rail is fixedly connected to one side wall of the ring-shaped main body mechanism, and an outer rail is fixedly connected to the other side wall. The bottom side wall of the outer rail has corrugated teeth. A spring bracket is hinged to the outer side of the outer rail, with a mounting hole at its center. Furthermore, by using two interlocking ring-shaped shells to form the ring-shaped main body mechanism, this invention allows for direct installation and application of the wear-resistant nylon inner protective layer on the outside of already laid cable assemblies, eliminating the need to insert the cable from the end of the cable assembly. This solves the problem of traditional integrated equipment being unable to operate in pipes with cables in use, resulting in a wider range of applications and more convenient installation.

Description

Technical Field

[0001] This invention relates to the field of cutting equipment technology, specifically to a cutting device and processing method for plastic pipes used in cable protection conduits. Background Technology

[0002] Existing cable protection pipe plastic pipe cutting equipment mostly adopts external clamping cutting or integrated internal robot structure, mainly used for pipe cutting operations in cable-free conditions. Although some equipment integrates cutting and cleaning functions, they generally adopt an integrated insertion installation, external clamping positioning and separate operation structure. The control and monitoring functions are simple and difficult to adapt to the closed construction scenario of buried pipelines with laid cables.

[0003] The following problems exist in the existing technology: 1. Most existing equipment is an integral structure, which must be installed by inserting it through the end of the pipe. It cannot be used directly on the existing cable protection pipes where cables have already been laid, which severely limits its applicable scenarios.

[0004] 2. Positioning mechanisms often use external clamping or internal tightening methods, which can easily squeeze and damage cables and pipes. Furthermore, the cutting, cleaning, and inspection functions are set up separately, and debris cannot be cleaned up in real time, which can easily remain inside the pipe and scratch the cable.

[0005] 3. The walking and cutting mechanism cannot adapt to pipe deformation, resulting in low equipment positioning accuracy, poor cut quality, insufficient automation and safety, and low construction efficiency. Summary of the Invention

[0006] To address the shortcomings mentioned in the background art, the present invention aims to provide a cutting device and processing method for plastic pipes used in cable protection conduits.

[0007] The objective of this invention can be achieved through the following technical solutions: A cutting device for plastic pipes used in cable protection pipes includes an annular main body mechanism, the annular main body mechanism including two interlocking annular shells, and a wear-resistant nylon inner ring protective layer provided on the inner side of the annular shells; A side rail is fixedly connected to one side wall of the annular main body, and an outer rail is fixedly connected to the other side outer wall. The bottom side wall of the outer rail is provided with corrugated teeth. A spring bracket is hinged to the outer side of the outer track, and a mounting hole is provided in the center of the spring bracket. A moving mechanism is installed on the outside of the ring-shaped main body. The moving mechanism is elastically connected to the spring bracket through the mounting hole and is used to drive the ring-shaped main body to move inside the cable protection tube. Two rotary positioning mechanisms are movably installed on the side rail of the annular main body mechanism, and the two rotary positioning mechanisms can move freely along the circumference of the side rail. One of the rotary positioning mechanisms integrates an internal cutting mechanism and a cleaning mechanism, while the other rotary positioning mechanism integrates an observation and detection mechanism. A pipe support mechanism is movably installed on the outer track of the annular main body. The pipe support mechanism engages with the corrugated teeth of the outer track through the teeth at its bottom end to achieve radial tightening and fixation within the pipe.

[0008] Furthermore, the moving mechanism includes an outer wheel frame, a drive wheel bracket fixedly connected to the top of the outer wheel frame, a drive wheel provided inside the drive wheel bracket, a driven bracket hinged to the inner side of the outer wheel frame, a driven rotating wheel provided at the end of the driven bracket, a torsion spring provided at the hinge point between the driven bracket and the outer wheel frame, a push rod fixedly connected to the bottom of the outer wheel frame, a compression spring fixedly connected to the bottom of the push rod, and the push rod and the compression spring are assembled in the mounting hole of the annular main body mechanism, so that the drive wheel and the driven rotating wheel are always in contact with the inner wall of the pipe by the elastic force of the compression spring.

[0009] Furthermore, the rotary positioning mechanism includes a lateral shift bracket, a roller at the bottom of the lateral shift bracket, the roller slidingly engaging with the side rail of the annular main body mechanism, a mounting groove at the top of the lateral shift bracket, a mounting support plate inside the mounting groove, a mounting bracket inside the mounting support plate, a lifting toothed plate fixedly connected to the bottom of the mounting bracket, and a drive gear meshing with the lifting toothed plate on the outside of the lateral shift bracket. The drive gear drives the lifting toothed plate and the mounting bracket to rise and fall in a direction perpendicular to the side rail.

[0010] Furthermore, the internal cutting mechanism includes a driving cutting mechanism, which is fixed to the top of the mounting bracket of the rotary positioning mechanism; The upper end of the drive cutting mechanism is fixedly connected to a transmission bracket, and a cutting disc is rotatably connected to the inner side of the transmission bracket. The cutting disc is moved closer to or away from the pipe wall by the lifting and lowering of the mounting bracket.

[0011] Furthermore, the cleaning mechanism includes an exhaust mechanism, which is fixed to the top of the mounting bracket of the rotary positioning mechanism. The upper end of the exhaust mechanism is connected to an exhaust pipe extending to the vicinity of the cutting disc, and the bottom end of the exhaust mechanism is connected to a recovery chamber through an air guide pipe. The recovery chamber is fixed to the bottom end of the mounting bracket.

[0012] Furthermore, the observation and detection mechanism includes a mounting rod, which is fixed to the top of the mounting bracket of another rotary positioning mechanism. A signal transmission mechanism is fixed to the outside of the mounting rod, and a detection device facing the cutting direction is provided at the top of the mounting rod.

[0013] Furthermore, the tube support mechanism includes two symmetrically arranged positioning brackets. A positioning spring is fixedly connected to the inner side of the positioning bracket, and a positioning push plate is fixedly connected to the top of the positioning spring. The top of the positioning push plate is provided with multiple wall-adhering wheels, and an inner wheel frame is provided at the upper end of the wall-adhering wheels. A drive motor is installed inside the positioning bracket, and a transmission push frame is hinged to the top of the positioning bracket. A direct support plate is hinged to the end of the transmission push frame, and a friction strip is provided on the outer side of the direct support plate. One positioning bracket has teeth at its bottom end that mesh with the corrugated teeth of the outer track, while the other positioning bracket has no teeth at its bottom end. The positioning bracket is driven to move along the outer track by the drive motor, and the position is locked by the engagement of the teeth and the corrugated teeth.

[0014] A method for cutting and processing plastic pipes for cable protection conduits includes the following steps: Step 1: Select the working well, the operator enters the well, and snaps the two annular shells together on the outside of the laid cable group. After installing the wear-resistant nylon inner protective layer, the connection is completed. Step 2: Place the equipment inside the pipe. The active rotating wheel of the moving mechanism adheres to the pipe wall under the action of the compression spring, and the driven rotating wheel presses against the pipe wall under the action of the torsion spring. The remote-controlled drive of the active rotating wheel moves the equipment along the pipe axis to the target cutting position. Step 3: Control the drive motor of the pipe support mechanism to run, the positioning brackets on both sides move closer to each other along the outer track, the transmission pusher flips and pushes the direct support plate, so that the friction strips tighten the inner wall of the pipe, and the positioning brackets are locked by the meshing of the teeth at the bottom of the positioning brackets with the corrugated teeth of the outer track, thus completing the positioning and fixing of the equipment. Step 4: Drive the active gear of the rotary positioning mechanism to raise the lifting toothed plate, so that the cutting disc approaches the pipe wall and starts cutting; at the same time, control the side-moving bracket to move circumferentially along the side track to achieve pipe circumferential cutting; start the exhaust mechanism to collect the cutting debris through the exhaust pipe and introduce it into the recovery chamber. Step 5: Simultaneously start the observation and detection mechanism to monitor the cutting effect in real time through the detection device, and transmit the signal externally through the signal transmission mechanism; Step Six: After cutting, release the pipe support mechanism from its fixed position, remotely control the equipment to exit the pipeline, and the staff will take out the cut pipe to complete the replacement.

[0015] The beneficial effects of this invention are: 1. The present invention uses two interlocking annular shells to form an annular main body structure, which can be directly fastened and installed on the outside of the cable group with the cable already laid and a wear-resistant nylon inner protective layer can be set. It does not need to be inserted from the end of the cable group, which solves the problem that traditional integrated equipment cannot be operated in the pipeline with cable in use. It has a wider range of applicable scenarios and is more convenient to install.

[0016] 2. This invention achieves inner wall support and positioning through the transmission pusher and direct support plate of the tube support mechanism, without contacting the central cable. At the same time, the inner cutting mechanism, cleaning mechanism, and observation and detection mechanism are integrated into the same rotary positioning mechanism to achieve coaxial synchronous operation. The debris generated by cutting is collected in real time to the recovery chamber by the exhaust mechanism and exhaust pipe, effectively avoiding debris residue from scratching the cable, making the positioning more stable and safer.

[0017] 3. This invention uses an active rotating wheel and a driven rotating wheel of a moving mechanism, combined with a compression spring and a torsion spring, to form an elastic adaptive walking structure. This structure can conform to the inner wall of the pipe and compensate for elliptical deformation. Combined with a rotating positioning mechanism and a side track, it can achieve precise circumferential cutting. The equipment moves smoothly and produces neat cuts. Furthermore, it achieves automated operation through wired dual-channel control, which greatly improves cutting accuracy and construction efficiency. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the assembly mechanism of the present invention.

[0021] Figure 3 This is a schematic diagram of the moving mechanism of the present invention.

[0022] Figure 4 This is a schematic diagram of the rotating and moving mechanism of the present invention.

[0023] Figure 5 yes Figure 4 Enlarged diagram of point A in the middle.

[0024] Figure 6 This is a schematic diagram of the tube support mechanism of the present invention.

[0025] Figure 7 This is a schematic diagram of the usage state of the present invention.

[0026] In the diagram: 1. Annular main body mechanism; 11. Annular shell; 12. Side rail; 13. Outer rail; 14. Spring bracket; 15. Mounting hole; 2. Moving mechanism; 21. Outer wheel frame; 22. Drive wheel bracket; 23. Drive wheel; 24. Driven bracket; 25. Driven rotating wheel; 26. Torsion spring; 27. Push rod; 28. Compression spring; 3. Rotary positioning mechanism; 31. Side shift bracket; 32. Mounting groove; 33. Mounting support plate; 34. Mounting bracket; 35. Lifting gear plate; 36. Drive gear; 4. Inner... 41. Cutting mechanism; 42. Drive cutting mechanism; 43. Transmission bracket; 44. Cutting disc; 5. Cleaning mechanism; 51. Exhaust mechanism; 52. Exhaust duct; 53. Air duct; 54. Recovery chamber; 6. Observation and detection mechanism; 61. Mounting rod; 62. Signal transmission mechanism; 63. Detection device; 7. Support tube mechanism; 71. Positioning bracket; 72. Positioning spring; 73. Positioning push plate; 74. Wall-mounted wheel; 75. Inner wheel frame; 76. Drive motor; 77. Transmission push frame; 78. Direct support plate; 79. Friction strip. Detailed Implementation

[0027] 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.

[0028] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0029] A cutting device for plastic pipes used in cable protection conduits, such as Figure 1 As shown, it includes a ring-shaped main body mechanism 1, and a moving mechanism 2 for driving the equipment to move inside the pipe is installed on the outside of the ring-shaped main body mechanism 1. The side wall of the ring-shaped main body 1 is provided with two rotating positioning mechanisms 3 that can move freely along its circumference. One of the rotating positioning mechanisms 3 integrates an internal cutting mechanism 4 and a cleaning mechanism 5, and the other rotating positioning mechanism 3 is equipped with an observation and detection mechanism 6. The outer side of the annular main body 1 is also provided with a pipe support mechanism 7 for supporting the inner wall of the pipe.

[0030] The cable is encased in a structure formed by two annular main bodies 1, while the outer side directly contacts the inner wall of the cable protection tube. The inner side of the annular main body 1 is in direct contact with the cable through a nylon protective layer. This wear-resistant protective layer can prevent the cable from directly contacting the mechanism, which could cause friction and affect the cable's use. The moving mechanism 2 is used to control the movement of the entire mechanism inside the cable protection tube. The rotating positioning mechanism 3 moves outside the annular main body 1, driving the inner cutting mechanism 4 and the cleaning mechanism 5 to move during operation, cutting at different positions and performing corresponding air extraction and cleaning treatments. The observation and detection mechanism 6 detects the cutting effect, and the data is transmitted in real time for easy confirmation by the staff. The tube support mechanism 7 is used to support the device before cutting, fixing the device in the cutting position for easy cutting.

[0031] like Figure 2 As shown, the annular main body mechanism 1 includes two interlocking annular shells 11. The inner side of the annular shell 11 is provided with a wear-resistant nylon inner ring protective layer. A side rail 12 is fixedly connected to one side wall of the annular shell 11, and an outer rail 13 is fixedly connected to the outer side of the annular shell 11. The bottom side wall of the outer rail 13 is provided with corrugated teeth. A spring bracket 14 is hinged to the outer side of the outer rail 13, and a mounting hole 15 is opened in the center of the spring bracket 14.

[0032] The working state is adjusted by the annular housing 11 with its two ends interlocked. The side rail 12 is used to guide the rotation positioning mechanism 3 to move, the outer rail 13 is used to guide the movement of the support tube mechanism 7, and the spring bracket 14 and the mounting hole 15 are used to install the moving mechanism 2.

[0033] like Figure 3 As shown, the moving mechanism 2 includes an outer wheel frame 21, a push rod 27 is fixedly connected to the bottom end of the outer wheel frame 21, a compression spring 28 is fixedly connected to the bottom end of the push rod 27, and the push rod 27 and the compression spring 28 are assembled in the mounting hole 15. The top of the outer wheel frame 21 is fixedly connected to the drive wheel bracket 22. The inner side of the drive wheel bracket 22 is provided with a drive wheel 23. The inner side of the outer wheel frame 21 is hinged to the driven bracket 24. The end of the driven bracket 24 is provided with a driven rotating wheel 25. A torsion spring 26 is provided at the hinge between the driven bracket 24 and the outer wheel frame 21.

[0034] The drive wheel 23 is rotated by a motor inside the outer wheel frame 21. The drive wheel bracket 22 is used for transmission. The torsion spring 26 is used to maintain the angle of the driven bracket 24. The driven rotating wheel 25 is used to directly contact the inner wall of the pipe and assist in the movement of the drive wheel 23. The push rod 27 and the compression spring 28 are used to be installed inside the mounting hole 15.

[0035] like Figure 4As shown, the rotary positioning mechanism 3 includes a side-shifting bracket 31. The bottom end of the side-shifting bracket 31 is provided with a roller, which slides in cooperation with the side rail 12. The top end of the side-shifting bracket 31 is provided with a mounting groove 32. The inner side of the mounting groove 32 is provided with a mounting support plate 33. The inner side of the mounting support plate 33 is provided with a mounting bracket 34. The bottom end of the mounting bracket 34 is fixedly connected with a lifting toothed plate 35. The outer side of the side-shifting bracket 31 is provided with a drive gear 36 that meshes with the lifting toothed plate 35.

[0036] The wheel at the bottom of the side-shifting bracket 31 is driven by the internal motor of the side-shifting bracket 31, allowing the side-shifting bracket 31 to move outside the side track 12. The mounting slot 32 is used to install the mounting plate 33. The mounting bracket 34 is used to install the internal cutting mechanism 4, the cleaning mechanism 5, and the observation and detection mechanism 6. The lifting toothed plate 35 is controlled by the drive gear 36 to lift the mounting bracket 34 for movement.

[0037] like Figure 5 As shown, the inner cutting mechanism 4 includes a driving cutting mechanism 41, which is fixed to the top of the mounting bracket 34. A transmission bracket 42 is fixedly connected to the upper end of the driving cutting mechanism 41, and a cutting disc 43 is rotatably connected to the inner side of the transmission bracket 42.

[0038] The cleaning mechanism 5 includes an exhaust mechanism 51, which is fixed to the top of the mounting bracket 34. An exhaust pipe 52 is connected to the upper end of the exhaust mechanism 51, and a recovery chamber 54 is connected to the bottom end of the exhaust mechanism 51 through an air guide pipe 53. The recovery chamber 54 is fixed to the bottom end of the mounting bracket 34.

[0039] The drive cutting mechanism 41 controls the transmission bracket 42 to drive the cutting disc 43 to cut the pipe from the inner wall. The cutting speed and cutting angle of the drive cutting mechanism 41 are controlled by the external control mechanism. The exhaust mechanism 51 works with the umbrella-shaped opening at the top of the mounting bracket 34 to collect the plastic debris generated by cutting, and guides the debris into the recycling chamber 54 for recycling through the exhaust pipe 52 and the air guide pipe 53.

[0040] like Figure 4 As shown, the observation and detection mechanism 6 includes a mounting rod 61, which is fixed to the top of the mounting bracket 34. A signal transmission mechanism 62 is fixed to the outside of the mounting rod 61, and a detection device 63 is provided at the top of the mounting rod 61.

[0041] The detection device 63 collects signals of the cutting status, allowing external control personnel to analyze the collected signals to determine the cutting status and cutting effect.

[0042] like Figure 6As shown, the tube support mechanism 7 includes two symmetrically arranged positioning brackets 71. One positioning bracket 71 has teeth at its bottom end that mesh with the corrugated teeth of the outer track 13, while the other positioning bracket 71 has no teeth at its bottom end. Positioning springs 72 are fixedly connected to the inner side of both positioning brackets 71. Positioning push plates 73 are fixedly connected to the top of the positioning springs 72. Multiple wall-adhering wheels 74 are provided at the top of the positioning push plates 73. Inner wheel frames 75 are provided at the upper end of the wall-adhering wheels 74. A drive motor 76 is installed inside the positioning brackets 71. A transmission push frame 77 is hinged to the top of the positioning brackets 71. A direct support plate 78 is hinged to the end of the transmission push frame 77. Friction strips 79 are provided on the outer side of the direct support plate 78.

[0043] Through the interaction between the corrugated teeth of the positioning bracket 71 and the corrugated teeth on the bottom sidewall of the outer track 13, one side of the positioning bracket 71 is relatively fixed to the outer track 13, while the other side of the positioning bracket 71 without corrugated teeth can slide relative to the outer track 13. This sliding is controlled by the drive motor 76. The drive motor 76 outputs power to control the rotation of the inner wheel frame 75, causing the inner wheel frame 75 and the outer track 13 to rotate and interact, causing the positioning bracket 71 to move accordingly. One side of the positioning bracket 71 moves while the other side of the positioning bracket 71 does not move. The two move closer to each other, pushing the transmission pusher 77 to flip. The direct support plate 78 is pushed upward by this flip. When the direct support plate 78 is in contact with the inner wall of the pipe, the friction strip 79 increases the friction force, so that the direct support plate 78 can support the pipe wall more stably, maintaining the stability of the entire equipment during the cutting process.

[0044] like Figure 7 As shown, a cutting and processing method for plastic pipes used as cable protection conduits includes the following steps: Step 1: Select the working well, the operator enters the well, and snaps the two annular shells 11 together onto the outside of the laid cable group. After installing the wear-resistant nylon inner protective layer, the connection is completed. Step 2: Place the equipment inside the pipe. The active rotating wheel 23 of the moving mechanism 2 adheres to the pipe wall under the action of the compression spring 28, and the driven rotating wheel 25 presses against the pipe wall under the action of the torsion spring 26. The remote control drives the active rotating wheel 23 to move the equipment along the pipe axis to the target cutting position. Step 3: Control the drive motor 76 of the pipe support mechanism 7 to run, the positioning brackets 71 on both sides move closer to each other along the outer track 13, the transmission pusher 77 flips and pushes the direct support plate 78, so that the friction strip 79 tightens the inner wall of the pipe, and the toothed teeth at the bottom of the positioning bracket 71 engage with the corrugated teeth of the outer track 13 to lock and complete the positioning and fixing of the equipment. Step 4: Drive the active gear 36 of the rotary positioning mechanism 3 to raise the lifting tooth plate 35, so that the cutting disc 43 approaches the pipe wall and starts cutting; at the same time, control the side-moving bracket 31 to move circumferentially along the side track 12 to achieve pipe circumferential cutting; start the exhaust mechanism 51, collect the cutting debris through the exhaust pipe 52 and introduce it into the recovery chamber 54. Step 5: Simultaneously start the observation and detection mechanism 6, monitor the cutting effect in real time through the detection device 63, and transmit the signal through the signal transmission mechanism 62; Step Six: After cutting, release the fixed state of the pipe support mechanism 7, remotely control the equipment to exit the pipeline, and the staff take out the cut pipe to complete the replacement.

[0045] The entire mechanism is remotely controlled by personnel located inside the inspection well. The remote control system includes a remote master control and a built-in control architecture, integrating a signal transmission unit and a detection feedback unit. Four modules work together for control. Remote control includes controlling the rotation of the active rotating wheel 23 inside the moving mechanism 2, allowing the entire mechanism to move autonomously inside the pipe. It also includes controlling the motor inside the side-moving bracket 31, enabling the internal cutting mechanism 4, cleaning mechanism 5, and observation and detection mechanism 6 to move to the required working positions for cutting, waste collection, and monitoring. Simultaneously, it controls the motor of the active gear 36, allowing the lifting gear plate 35 to push the mounting bracket 34 up and down. After positioning, a command is sent to the cutting mechanism, which moves during the cutting process for slow and stable cutting. During cutting, the exhaust mechanism 51 extracts air to collect cutting waste, preventing waste from remaining in the pipe and affecting the cables. The detection device 63 collects real-time data, facilitating personnel's assessment of the cutting effect. A built-in alarm module monitors the exhaust pressure; if abnormalities such as filter blockage occur, an audible and visual alarm is immediately triggered, and operation is suspended. After processing, the control system sends a command to the moving mechanism 2, driving the equipment to move in the opposite direction and retreat along the pipeline axis to the inspection well, completing a single cutting and cleaning operation without direct manual intervention. Signal transmission uses a wired method, employing RS485 + Ethernet dual signal channels to achieve bidirectional communication between the main control console inside the inspection well and the equipment's built-in control module. The transmission is stable and interference-resistant, capable of transmitting equipment operating parameters, pipeline operation images, and alarm signals in real time, eliminating interference from the complex underground environment on wireless signals. Operators can intuitively monitor the operation status; simultaneously, all operation parameters are stored in the data storage module, supporting subsequent traceability, querying, and parameter optimization.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," 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 invention. In this specification, 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.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A cutting device for plastic pipes used in cable protection conduits, characterized in that, It includes a ring-shaped main body mechanism (1), which includes two interlocking ring-shaped housings (11), and the inner side of the ring-shaped housings (11) is provided with a wear-resistant nylon inner ring protective layer; The annular main body (1) has a side rail (12) fixedly connected to one side wall and an outer rail (13) fixedly connected to the other side outer wall. The bottom side wall of the outer rail (13) is provided with corrugated teeth. A spring bracket (14) is hinged to the outer side of the outer track (13), and a mounting hole (15) is provided in the center of the spring bracket (14). A moving mechanism (2) is installed on the outside of the ring-shaped main body (1). The moving mechanism (2) is elastically connected to the spring bracket (14) through the mounting hole (15) and is used to drive the ring-shaped main body (1) to move inside the cable protection pipe. Two rotary positioning mechanisms (3) are movably installed on the side rail (12) of the annular main body mechanism (1). The two rotary positioning mechanisms (3) can move freely along the circumference of the side rail (12). One of the rotary positioning mechanisms (3) integrates an internal cutting mechanism (4) and a cleaning mechanism (5), while the other rotary positioning mechanism (3) integrates an observation and detection mechanism (6). A pipe support mechanism (7) is movably installed on the outer track (13) of the annular main body mechanism (1). The pipe support mechanism (7) engages with the corrugated teeth of the outer track (13) through the toothed teeth at its bottom end to achieve radial tightening and fixing in the pipe.

2. The cutting equipment according to claim 1, characterized in that, The moving mechanism (2) includes an outer wheel frame (21), an active wheel bracket (22) is fixedly connected to the top of the outer wheel frame (21), an active rotating wheel (23) is provided on the inner side of the active wheel bracket (22), a driven bracket (24) is hinged on the inner side of the outer wheel frame (21), a driven rotating wheel (25) is provided at the end of the driven bracket (24), a torsion spring (26) is provided at the hinge between the driven bracket (24) and the outer wheel frame (21), a push rod (27) is fixedly connected to the bottom of the outer wheel frame (21), a compression spring (28) is fixedly connected to the bottom of the push rod (27), the push rod (27) and the compression spring (28) are assembled in the mounting hole (15) of the annular main body mechanism (1), and the active rotating wheel (23) and the driven rotating wheel (25) are always in contact with the inner wall of the pipe by the elastic force of the compression spring (28).

3. The cutting equipment according to claim 2, characterized in that, The rotary positioning mechanism (3) includes a side-shifting bracket (31). The bottom end of the side-shifting bracket (31) is provided with a roller. The roller is slidably engaged with the side rail (12) of the annular main body mechanism (1). The top end of the side-shifting bracket (31) is provided with a mounting groove (32). The inner side of the mounting groove (32) is provided with a mounting support plate (33). The inner side of the mounting support plate (33) is provided with a mounting bracket (34). The bottom end of the mounting bracket (34) is fixedly connected with a lifting toothed plate (35). The outer side of the side-shifting bracket (31) is provided with a drive gear (36) that meshes with the lifting toothed plate (35). The drive gear (36) drives the lifting toothed plate (35) and the mounting bracket (34) to rise and fall in a direction perpendicular to the side rail (12).

4. The cutting device according to claim 3, characterized in that, The inner cutting mechanism (4) includes a driving cutting mechanism (41), which is fixed to the top of the mounting bracket (34) of the rotary positioning mechanism (3). The upper end of the drive cutting mechanism (41) is fixedly connected to a transmission bracket (42), and the inner side of the transmission bracket (42) is rotatably connected to a cutting disc (43). The cutting disc (43) is moved closer to or away from the pipe wall by the lifting and lowering of the mounting bracket (34).

5. The cutting device according to claim 4, characterized in that, The cleaning mechanism (5) includes an exhaust mechanism (51), which is fixed to the top of the mounting bracket (34) of the rotary positioning mechanism (3). The upper end of the exhaust mechanism (51) is connected to an exhaust pipe (52) extending to the vicinity of the cutting disc (43), and the bottom end of the exhaust mechanism (51) is connected to a recovery chamber (54) through an air guide pipe (53). The recovery chamber (54) is fixed to the bottom end of the mounting bracket (34).

6. The cutting device according to claim 5, characterized in that, The observation and detection mechanism (6) includes a mounting rod (61), which is fixed to the top of the mounting bracket (34) of another rotary positioning mechanism (3). A signal transmission mechanism (62) is fixed to the outside of the mounting rod (61), and a detection device (63) facing the cutting direction is provided at the top of the mounting rod (61).

7. The cutting device according to claim 6, characterized in that, The support tube mechanism (7) includes two symmetrically arranged positioning brackets (71). One positioning bracket (71) has a positioning spring (72) fixedly connected to its inner side. The top of the positioning spring (72) is fixedly connected to a positioning push plate (73). The top of the positioning push plate (73) is provided with multiple wall-adhering wheels (74). The upper end of the wall-adhering wheels (74) is provided with an inner wheel frame (75). The positioning bracket (71) has a drive motor (76) installed inside. The top of the positioning bracket (71) is hinged with a transmission push frame (77). The end of the transmission push frame (77) is hinged with a direct support plate (78). The outside of the direct support plate (78) is provided with a friction strip (79). The bottom end of one positioning bracket (71) is provided with teeth that mesh with the corrugated teeth of the outer track (13). The bottom end of the other positioning bracket (71) is not provided with teeth. The positioning bracket (71) is driven by the drive motor (76) to move along the outer track (13) and the position is locked by the cooperation of the teeth and the corrugated teeth.

8. A method for cutting and processing plastic pipes for cable protection conduits, performed by the cutting equipment described in claim 7, characterized in that, Includes the following steps: Step 1: Select the working well, the operator enters the well, and snaps the two annular shells (11) together on the outside of the laid cable group. After assembling the wear-resistant nylon inner protective layer, the plug-in fixing is completed. Step 2: Place the equipment inside the pipe. The active rotating wheel (23) of the moving mechanism (2) adheres to the pipe wall under the action of the compression spring (28), and the driven rotating wheel (25) presses against the pipe wall under the action of the torsion spring (26). The remote control drives the active rotating wheel (23) to move the equipment along the pipe axis to the target cutting position. Step 3: Control the drive motor (76) of the pipe support mechanism (7) to run, the two side positioning brackets (71) move closer to each other along the outer track (13), the transmission pusher (77) flips and pushes the direct support plate (78), so that the friction strip (79) supports the inner wall of the pipe, and the toothed teeth at the bottom of the positioning bracket (71) mesh with the corrugated teeth of the outer track (13) to lock and complete the positioning and fixing of the equipment; Step 4: Drive the active gear (36) of the rotary positioning mechanism (3) to raise the lifting tooth plate (35) so that the cutting disc (43) approaches the pipe wall and starts cutting; at the same time, control the side-moving bracket (31) to move circumferentially along the side rail (12) to achieve pipe circumferential cutting; start the exhaust mechanism (51) to collect the cutting debris through the exhaust pipe (52) and introduce it into the recovery chamber (54). Step 5: Simultaneously start the observation and detection mechanism (6), and monitor the cutting effect in real time through the detection device (63). The signal is transmitted to the outside through the signal transmission mechanism (62). Step 6: After the cutting is completed, release the fixed state of the pipe support mechanism (7), remotely control the equipment to exit the pipeline, and the staff take out the cut pipe to complete the replacement.

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