Polishing device suitable for pipeline

Abstract

The polishing device suitable for the pipeline comprises a base, a polishing assembly is arranged on the base, the polishing assembly comprises a moving column arranged on the base in a threaded fit mode, polishing bases sliding in the radial direction of the moving column are arranged on the moving column in a circumferential array mode, and polishing parts are arranged on the polishing bases in a linear array mode; balls located on the front side of the polishing part are rotationally arranged on the grinding base. According to the polishing device suitable for the pipeline, the moving column continues to rotate and advance to stretch into the pipeline, so that the balls and the polishing part abut against the inner wall of the pipeline and move and rub the inner wall in the circumferential direction, and the balls make contact with the inner wall of the pipeline needing to be polished before the polishing part; at the moment, the balls can roll to conduct rolling and vibration falling removal on sundries or corrosion points on the inner wall of the pipeline, so that the problem that the inner wall of the pipeline is scratched due to the fact that the inner wall of the pipeline is scratched by the sundries or rust carried by the polishing part in the follow-up process is solved, and the polishing forming quality of the inner wall of the pipeline is improved.

Description

Technical Field

[0001] The invention relates to the technical field of polishing devices, and in particular to a polishing device suitable for pipelines. Background Art

[0002] Pipes are commonly used equipment in life. Usually, pipes need to be treated with rust prevention. Before rust prevention treatment, the pipes need to be polished so that the rust inhibitor can better adhere to the pipe surface.

[0003] According to announcement number CN204843819U, announcement date: 2015.12.09, a mechanical grinding device for polishing the inner wall of a round tube is disclosed. The round tube inner wall polishing machine of the present invention includes a driving device, a polishing wheel device, an inner tube support device, a walking trolley and a fixing device installed on a frame. The driving device works in the round tube and is connected to the inner tube support device to ensure smooth polishing. The polishing wheel device includes a plastic wheel hub and a polishing material, and the connecting rod can be increased or decreased according to the length of the tube. The pipeline inner wall polishing machine of the present invention has a simple structure and is easy to use. It is suitable for polishing the inner walls of round tubes of different diameters and lengths, and has a uniform polishing degree and an ideal polishing effect. It is suitable for various working environments.

[0004] In the prior art including the above-mentioned patent, a plurality of sheet-shaped polishing sheets of a polishing wheel device are extended into the inner wall of the pipe, and a driving device drives the polishing sheets to rotate circumferentially to scratch and polish the inner wall of the pipe. However, pipes with contaminated inner walls are commonly used in life, and usually the pipes need to be rust-proofed. Before the rust-proofing, the pipes need to be polished so that the rust inhibitor can better adhere to the debris on the surface of the pipe. When polishing the pipe with rust, the polishing sheet will scrape off the debris on the inner wall of the pipe and drive the debris to rotate synchronously to scratch the inner wall of the pipe, thereby causing the inner wall of the pipe to be scratched by the debris or rust, resulting in poor surface quality of the inner wall after polishing. Summary of the invention

[0005] The object of the present invention is to provide a polishing device suitable for pipelines to solve the above problems.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a polishing device suitable for a pipeline, comprising a base, on which a polishing assembly is arranged, the polishing assembly comprises a movable column threadedly arranged on the base, a circular array of polishing seats sliding radially thereof are arranged on the movable column, a linear array of polishing portions are arranged on the polishing seat, a ball located in front of the polishing portion is rotatably arranged on the polishing seat, the polishing seat is driven to move relatively away from the movable column radially so that the ball and the polishing portion abut against the inner wall of the pipeline, and the movable column is driven to rotate to mobilize the polishing seat to rotate circumferentially and move axially into the pipeline.

[0007] Preferably, a supporting portion is provided on the base, a supporting roller is rotatably provided on the supporting portion, and a driving assembly is also provided on the base, the driving assembly includes a vertically movable seat and a driving roller symmetrically rotatably provided on the vertically movable seat, the vertically movable seat is driven to slide vertically so that the driving roller contacts the outer wall of the pipe, and the driving roller squeezes the pipe on the supporting roller, and the driving roller is driven to rotate to push the pipe to rotate in the opposite direction relative to the moving column.

[0008] Preferably, a circumferential array of chip grooves extending along the axis of the movable column is provided on the polishing portion of the grinding seat.

[0009] Preferably, it also includes an exhaust hose, a first end of which is connected to the outflow hole provided on the grinding seat, and a second end is connected to the outside. The grinding seat is provided with a plurality of suction holes located between the polishing parts, and the suction holes are all connected to the outflow hole.

[0010] Preferably, a horizontal sliding groove is provided on the base, a sliding seat is slidably arranged in the horizontal sliding groove, a third driving motor is fixedly connected to the sliding seat, the first end of the moving column is fixedly connected to the output end of the third driving motor, and the moving column is rotatably arranged in a threaded hole provided on the base.

[0011] Preferably, a horizontal movable seat is provided on the first mounting portion of the base, the horizontal movable seat is fixedly connected to the sliding seat via a connecting portion, a vertical sliding groove is provided on the horizontal movable seat, a vertical sliding portion is provided on the vertical movable seat, and the vertical sliding portion is slidably arranged in the vertical sliding groove.

[0012] Preferably, a synchronous belt is further included, an installation groove is opened on the vertical movable seat, a second drive motor is arranged in the installation groove, and the output end of the second drive motor extends to the outside of the vertical movable seat, and a drive shaft is coaxially arranged on the drive roller, and the synchronous belt is sleeved on the drive shaft and the output end of the second drive motor to rotate the drive roller.

[0013] Preferably, a gear shaft and a first drive motor are provided in the movable column, the gear shaft is rotatably arranged and the end portion is fixedly connected to the output end of the first drive motor, a toothed plate portion is provided on the grinding seat, the toothed plate portion is coupled to the gear shaft, and the gear shaft is driven to rotate to drive the toothed plate portion to slide radially along the movable column.

[0014] In the above technical scheme, the present invention provides a polishing device suitable for pipes, which has the following beneficial effects: the moving column continues to rotate and advance into the pipe, so that the ball and the polishing part are in contact with the inner wall of the pipe and move circumferentially and scratched. Since the ball contacts the inner wall of the pipe to be polished and grinded before the polishing part, the ball can roll and vibrate to remove the debris or rust spots on the inner wall of the pipe, thereby avoiding the problem of scratches on the inner wall of the pipe caused by the subsequent polishing part carrying debris or rust to scratch the inner wall of the pipe, thereby improving the polishing and molding quality of the inner wall of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a base frame and supporting rollers provided in an embodiment of the present invention; Figure 3 A schematic diagram of the exploded structure of a grinding assembly provided in an embodiment of the present invention; Figure 4 A schematic cross-sectional view of the structure of a grinding assembly provided by an embodiment of the present invention; Figure 5 A schematic diagram of the exploded structure of a drive assembly provided in an embodiment of the present invention.

[0017] Description of reference numerals: 1. base; 11. supporting part; 12. threaded hole; 13. first mounting part; 14. horizontal sliding groove; 15. through groove; 2. grinding assembly; 21. grinding seat; 211. polishing part; 212. chip discharge groove; 213. suction hole; 2131. outflow hole; 214. radial sliding part; 215. tooth plate part; 22. gear shaft; 23. first driving motor; 24. ball bearing; 25. exhaust hose; 26. moving column; 3. Support roller; 4. Horizontal movable seat; 41. Connecting part; 42. Vertical sliding groove; 43. Second mounting part; 5. Driving assembly; 51. Vertical movable seat; 511. Mounting part; 512. Mounting groove; 513. Vertical sliding part; 52. Driving roller; 521. Driving shaft; 53. Second driving motor; 54. Synchronous belt; 55. Driving cylinder; 91. Third driving motor; 92. Sliding seat; 921. Horizontal sliding part. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0019] like Figure 1-5 As shown, a polishing device suitable for a pipeline comprises a base 1 on which a polishing assembly 2 is arranged, the polishing assembly 2 comprises a movable column 26 threadedly arranged on the base 1, a circular array of polishing seats 21 radially sliding thereon are arranged on the movable column 26, a linear array of polishing portions 211 are arranged on the polishing seat 21, a ball 24 located in front of the polishing portion 211 is rotatably arranged on the polishing seat 21, the polishing seat 21 is driven to move relatively away from the movable column 26 radially so that the ball 24 and the polishing portion 211 abut against the inner wall of the pipeline, and the movable column 26 is driven to rotate to mobilize the polishing seat 21 to rotate circumferentially and move axially into the pipeline.

[0020] Specifically, Figure 1 As shown, the movable column 26 is threadedly arranged on the base 1, and the right end of the movable column 26 is the first end, and the left end is the second end. A grinding assembly 2 is arranged on the right end of the movable column 26, and a plurality of grinding seats 21 of the grinding assembly 2 are distributed in a circumferential array on the movable column 26, and a polishing portion 211 and a ball 24 located in front of the polishing portion 211 are arranged on the grinding seat 21. When it is necessary to grind the inner wall of the pipeline, the pipeline can be firstly aligned axially with the movable column 26 and fixed on the base 1, and then the movable column 26 can be rotated. The movable column 26 is threadedly matched with the base 1 so that the movable column 26 can be extended into the pipeline while rotating axially relative to the pipeline. Subsequently, the multiple grinding seats 21 are all made to slide radially along the movable column 26 so that the ball 24 and the polishing part 211 are in contact with the inner wall of the pipe. Subsequently, the movable column 26 continues to rotate and advance into the pipe, so that the ball 24 and the polishing part 211 are in contact with the inner wall of the pipe and move circumferentially and scratch. Since the ball 24 contacts the inner wall of the pipe to be polished before the polishing part 211, the ball 24 can roll and vibrate to remove the debris or rust spots on the inner wall of the pipe, thereby avoiding the problem of scratching the inner wall of the pipe caused by the subsequent polishing part 211 carrying debris or rust and scratching the inner wall of the pipe, thereby improving the polishing and molding quality of the inner wall of the pipe.

[0021] Among them, Figure 3 As shown, the grinding seat 21 is provided with a radial sliding portion 214 so as to be slidably disposed on the moving post 26 along the radial direction of the moving post 26 , thereby improving the sliding stability of the grinding seat 21 when it slides out.

[0022] In the above technical solution, the movable column 26 is used to continue to rotate and advance into the pipe, so that the ball 24 and the polishing part 211 are pressed against the inner wall of the pipe and move circumferentially and scratched. Since the ball 24 contacts the inner wall of the pipe to be polished and grinded before the polishing part 211, the ball 24 can roll and vibrate to remove the debris or rust spots on the inner wall of the pipe, thereby avoiding the problem of scratches on the inner wall of the pipe caused by the subsequent polishing part 211 carrying debris or rust and scratching the inner wall of the pipe, thereby improving the polishing and molding quality of the inner wall of the pipe.

[0023] As an embodiment further provided by the present invention, a supporting portion 11 is provided on the base 1, and a supporting roller 3 is rotatably provided on the supporting portion 11. A driving assembly 5 is also provided on the base 1, and the driving assembly 5 includes a vertically movable seat 51 and a driving roller 52 symmetrically rotatably provided on the vertically movable seat 51. The vertically movable seat 51 is driven to slide vertically so that the driving roller 52 contacts the outer wall of the pipe, and the driving roller 52 squeezes the pipe on the supporting roller 3, and the driving roller 52 is driven to rotate to push the pipe to rotate in the opposite direction relative to the moving column 26.

[0024] Specifically, Figure 1 As shown, a supporting roller 3 is arranged on the supporting portion 11 of the base 1, and a driving roller 52 is arranged on the vertical movable seat 51 of the driving assembly 5. When it is necessary to grind the pipe, the pipe is first placed on the two supporting rollers 3, and then the vertical movable seat 51 is driven to slide vertically downward close to the outer wall of the pipe, so that the driving roller 52 symmetrically contacts the outer wall of the pipe. At this time, the pipe is clamped and fixed by the driving roller 52 and the supporting roller 3 to make the pipe coaxial with the moving column 26, thereby improving the grinding stability of the grinding assembly 2 on the moving column 26 for the pipe, and secondly, the driving roller 52 can also be made to rotate synchronously, thereby pushing the pipe to rotate in the opposite direction relative to the rotation direction of the moving column 26, thereby further improving the relative movement speed of the pipe relative to the grinding seat 21, and improving the grinding efficiency of the polishing part 211 for the inner wall of the pipe.

[0025] As a further embodiment of the present invention, a circumferential array of chip grooves 212 are provided on the polishing portion 211 of the grinding seat 21 and penetrate along the axial direction of the moving column 26 .

[0026] Specifically, Figure 3 As shown, a plurality of chip grooves 212 are provided on the polishing portion 211 of the grinding seat 21, and the chip grooves 212 penetrate along the axial direction of the movable column 26. When the movable column 26 rotates and moves so that the polishing portion 211 polishes the inner wall of the pipe, the existence of the chip grooves 212 can cause the dust or debris generated by the polishing friction to flow out along the chip grooves 212 to leave the grinding seat 21 and the inner wall of the pipe, thereby avoiding the problem that the impurities generated by polishing are mixed between the grinding seat 21 and the inner wall of the pipe and are scratched by friction, thereby further improving the polishing forming quality of the inner wall of the pipe.

[0027] As a further embodiment of the present invention, it also includes an exhaust hose 25, a first end of which is connected to the outflow hole 2131 opened on the grinding seat 21, and a second end is connected to the outside world. The grinding seat 21 is provided with a plurality of suction holes 213 located between the polishing parts 211, and the suction holes 213 are all connected to the outflow hole 2131.

[0028] Specifically, Figure 4 As shown, the first end of the exhaust hose 25 is connected to the outflow hole 2131 of the grinding seat 21, and the second end of the exhaust hose 25 is connected to the external exhaust device, and the suction hole 213 of the grinding seat 21 is connected to the outflow hole 2131. When the movable column 26 rotates and moves so that the polishing part 211 polishes the inner wall of the pipeline, the existence of the chip groove 212 can make the dust or debris generated by the polishing friction flow out along the chip groove 212 to leave the gap between the grinding seat 21 and the inner wall of the pipeline, thereby preventing the impurities generated by polishing from being mixed between the grinding seat 21 and the inner wall of the pipeline and being scratched by friction. The problem of scratches on the inner wall surface of the pipeline is further improved, and when the dust or debris generated by the polishing friction flows out along the chip groove 212 and leaves between the grinding seat 21 and the inner wall of the pipeline, the presence of the exhaust hose 25 and the exhaust device will generate suction on the suction hole 213, and then the dust or debris generated by the polishing friction is directly extracted from the pipeline along the suction hole 213, the outflow hole 2131 and the exhaust hose 25, thereby avoiding the need for additional flushing or cleaning of the adhered debris or dust in the pipeline, and further improving the efficiency of polishing.

[0029] Among them, the exhaust device is common technical knowledge for those skilled in the art and will not be described in detail here.

[0030] As an embodiment further provided by the present invention, a horizontal sliding groove 14 is opened on the base 1, a sliding seat 92 is slidably arranged in the horizontal sliding groove 14, a third driving motor 91 is fixedly connected to the sliding seat 92, a first end of the moving column 26 is fixedly connected to the output end of the third driving motor 91, and the moving column 26 is rotatably arranged in a threaded hole 12 opened on the base 1.

[0031] Specifically, Figure 2As shown, a threaded hole 12 is provided on the base 1, and the moving column 26 is threadedly assembled in the threaded hole 12, and a horizontal sliding portion 921 is provided on the sliding seat 92, and the horizontal sliding portion 921 is slidably set in the horizontal sliding groove 14 of the base 1, and the third driving motor 91 is fixedly connected to the sliding seat 92. When the output end of the third driving motor 91 drives the moving column 26 to rotate, the moving column 26 is threadedly matched with the threaded hole 12, and the moving column 26 drives the sliding seat 92 and the third driving motor 91 to move horizontally synchronously, so that the grinding component 2 can be rotated into the pipeline for polishing, and the horizontal sliding portion 921 of the sliding seat 92 and the horizontal sliding groove 14 of the base 1 can improve the stability of the moving column 26 in the horizontal direction, and further improve the grinding and polishing stability of the grinding component 2.

[0032] The electrical connection and procedure of the third driving motor 91 are common technical knowledge known to those skilled in the art and will not be elaborated here.

[0033] As an embodiment further provided by the present invention, a horizontal movable seat 4 is arranged on the first mounting portion 13 of the base 1, and the horizontal movable seat 4 is fixedly connected to the sliding seat 92 via a connecting portion 41. A vertical sliding groove 42 is opened on the horizontal movable seat 4, and a vertical sliding portion 513 is arranged on the vertical movable seat 51, and the vertical sliding portion 513 is slidably arranged in the vertical sliding groove 42.

[0034] Specifically, Figure 2 As shown, a through groove 15 is provided on the base 1, and the connecting portion 41 of the horizontal movable seat 4 passes through the through groove 15 to be fixedly connected with the sliding seat 92, so that the horizontal movable seat 4 and the sliding seat 92 move horizontally synchronously, and the vertical sliding portion 513 of the vertical movable seat 51 is slidably arranged in the vertical sliding groove 42 of the horizontal movable seat 4. Therefore, when the movable column 26 rotates and moves to drive the grinding assembly 2 to enter the inner wall of the pipeline for grinding and polishing, the vertical movable seat 51 follows the horizontal movable seat 4 and the sliding seat 92 and the movable column 26 to move horizontally synchronously, so that the horizontal relative distance between the driving roller 52 on the vertical movable seat 51 and the grinding assembly 2 remains unchanged, thereby improving the stability of the driving roller 52 driving the pipeline to rotate in the opposite direction relative to the movable column 26, improving the stability of grinding and polishing of the pipeline, and reducing the radial jitter of the pipeline. Secondly, the vertical sliding portion 513 of the vertical moving seat 51 is slidably arranged in the vertical sliding groove 42 of the horizontal moving seat 4, thereby improving the vertical sliding stability of the vertical moving seat 51 and increasing the stability of the driving roller 52 against the outer wall of the pipe.

[0035] Furthermore, the horizontal movable seat 4 is provided with a second mounting portion 43, and the second mounting portion 43 is provided with a driving cylinder 55 for driving the vertical movable seat 51 to slide vertically. The driving cylinder 55 is a technical common sense known to those skilled in the art and will not be described in detail here.

[0036] As an embodiment further provided by the present invention, it also includes a synchronous belt 54, a mounting groove 512 is opened on the vertical movable seat 51, a second drive motor 53 is arranged in the mounting groove 512, and the output end of the second drive motor 53 extends to the outside of the vertical movable seat 51, and a drive shaft 521 is coaxially arranged on the drive roller 52. The synchronous belt 54 is sleeved on the drive shaft 521 and the output end of the second drive motor 53 to rotate the drive roller 52.

[0037] Specifically, Figure 5 As shown, a mounting portion 511 is provided on the vertical movable seat 51, and a driving roller 52 is rotatably provided on the mounting portion 511, and a driving shaft portion 521 penetrates the mounting portion 511 and extends out of the outside of the vertical movable seat 51, and a second driving motor 53 is provided in the mounting groove 512, and a synchronous belt 54 is sleeved on the driving shaft portion 521 and the output end of the second driving motor 53 so that the two driving rollers 52 are driven by the second driving motor 53 to rotate synchronously, and then the second driving motor 53 and the driving roller 52 are used to drive the pipeline to rotate in the opposite direction relative to the moving column 26, thereby improving the polishing efficiency of the inner wall of the pipeline.

[0038] The electrical connection and procedure of the second driving motor 53 are common technical knowledge known to those skilled in the art and will not be elaborated here.

[0039] As an embodiment further provided by the present invention, a gear shaft 22 and a first drive motor 23 are arranged in the movable column 26, the gear shaft 22 is rotatably arranged and the end portion is fixedly connected to the output end of the first drive motor 23, and a toothed plate portion 215 is arranged on the grinding seat 21, the toothed plate portion 215 is coupled to the gear shaft 22, and the gear shaft 22 is driven to rotate to drive the toothed plate portion 215 to slide radially along the movable column 26.

[0040] Specifically, Figure 4 As shown, the gear shaft 22 is rotatably disposed in the moving column 26, and the end of the gear shaft 22 is fixedly connected to the output end of the first driving motor 23, and the toothed plate portion 215 is coupled to the gear shaft 22. When the first driving motor 23 drives the gear shaft 22 to rotate, the gear shaft 22 simultaneously drives multiple groups of grinding seats 21 to slide along the radial direction of the moving column 26 through the toothed plate portion 215 so that the ball 24 and the polishing portion 211 of the grinding seat 21 are in contact with the inner wall of the pipe, thereby reducing the overall volume of the grinding assembly 2 for easy entry into the pipe, and then the grinding assembly 2 is opened so that the polishing portion 211 is in contact with the inner wall of the pipe for grinding, thereby improving the applicability of the grinding assembly 2, and utilizing the gear shaft 22, the first driving motor 23 and the toothed plate portion 215 to improve the driving stability of the grinding seat 21.

[0041] The electrical connection and procedure of the first driving motor 23 are common technical knowledge known to those skilled in the art and will not be elaborated here.

[0042] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A polishing device suitable for a pipeline, characterized in that: The invention comprises a base (1) on which a grinding assembly (2) is arranged, the grinding assembly (2) comprising a movable column (26) threadedly arranged on the base (1), a grinding seat (21) radially slidingly arranged in a circumferential array on the movable column (26), a polishing portion (211) linearly arranged on the polishing seat (21), a ball (24) rotatably arranged on the polishing seat (21) and located in front of the polishing portion (211), the grinding seat (21) being driven to move relatively away from the movable column (26) in the radial direction so that the ball (24) and the polishing portion (211) are in contact with the inner wall of a pipe, and the movable column (26) is driven to rotate so as to mobilize the grinding seat (21) to rotate circumferentially and move axially into the pipe.

2. The polishing device for pipelines according to claim 1, characterized in that: The base (1) is provided with a supporting portion (11), on which a supporting roller (3) is rotatably provided. The base (1) is also provided with a driving assembly (5), the driving assembly (5) comprising a vertically movable seat (51) and a driving roller (52) symmetrically rotatably provided on the vertically movable seat (51), the vertically movable seat (51) being driven to slide vertically so that the driving roller (52) contacts the outer wall of the pipeline, and the driving roller (52) squeezes the pipeline onto the supporting roller (3), and the driving roller (52) is driven to rotate so as to push the pipeline to rotate in the opposite direction relative to the movable column (26).

3. The polishing device for pipelines according to claim 2, characterized in that: The polishing portion (211) of the grinding seat (21) is provided with a circumferential array of chip grooves (212) penetrating along the axis direction of the movable column (26).

4. The polishing device for pipelines according to claim 3, characterized in that: It also includes an exhaust hose (25), a first end of which is connected to an outflow hole (2131) provided on the grinding seat (21), and a second end of which is connected to the outside. The grinding seat (21) is provided with a plurality of suction holes (213) located between the polishing parts (211), and the suction holes (213) are all connected to the outflow hole (2131).

5. The polishing device for pipelines according to claim 4, characterized in that: The base (1) is provided with a horizontal sliding groove (14), a sliding seat (92) is slidably arranged in the horizontal sliding groove (14), a third driving motor (91) is fixedly connected to the sliding seat (92), a first end of the moving column (26) is fixedly connected to an output end of the third driving motor (91), and the moving column (26) is rotatably arranged in a threaded hole (12) provided in the base (1).

6. The polishing device for pipelines according to claim 5, characterized in that: A horizontal movable seat (4) is arranged on the first mounting portion (13) of the base (1); the horizontal movable seat (4) is fixedly connected to the sliding seat (92) via a connecting portion (41); a vertical sliding groove (42) is provided on the horizontal movable seat (4); a vertical sliding portion (513) is arranged on the vertical movable seat (51); and the vertical sliding portion (513) is slidably arranged in the vertical sliding groove (42).

7. The polishing device for pipelines according to claim 6, characterized in that: It also includes a synchronous belt (54), a mounting groove (512) is provided on the vertical movable seat (51), a second drive motor (53) is arranged in the mounting groove (512), and the output end of the second drive motor (53) extends to the outside of the vertical movable seat (51), a drive shaft (521) is coaxially arranged on the drive roller (52), and the synchronous belt (54) is sleeved on the drive shaft (521) and the output end of the second drive motor (53) to rotate the drive roller (52).

8. The polishing device for pipelines according to claim 1, characterized in that: A gear shaft (22) and a first drive motor (23) are arranged in the movable column (26); the gear shaft (22) is rotatably arranged and an end portion is fixedly connected to an output end of the first drive motor (23); a toothed plate portion (215) is arranged on the grinding seat (21); the toothed plate portion (215) is coupled to the gear shaft (22); the gear shaft (22) is driven to rotate so as to drive the toothed plate portion (215) to slide radially along the movable column (26).

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