Pipeline surface cleaning device and method

Abstract

The invention belongs to the technical field of pipeline surface coating maintenance, and particularly relates to a pipeline surface cleaning device which comprises a frame base, the upper portion of the frame base is in a transverse cylinder shape, a rotating cylinder is coaxially and rotatably connected to the interior of the cylinder of the frame base, and a plurality of arc-shaped cleaning brushes are evenly distributed in the rotating cylinder. A telescopic assembly is installed between each arc-shaped cleaning brush and the rotary drum, and the arc-shaped cleaning brushes are connected with the rotary drum through the telescopic assemblies. One end of the rotary drum is a feed port, and the other end of the rotary drum is a discharge port; and a feeding assembly is mounted on the frame base at the end of the feeding hole. Through the structural design of the telescopic assembly, the feeding assembly and the arc-shaped cleaning brush, the problems that the device can only clean a pipeline with a single pipe diameter and the pipeline cannot be automatically fed are solved, and substances such as a coating and rust on the surface of the pipeline are thoroughly removed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pipeline surface coating maintenance, and particularly relates to a pipeline surface cleaning device and method. BACKGROUND

[0002] In a refining and chemical enterprise, as the service life of the coating is prolonged, the coating needs to be maintained, and the surface treatment effect of the maintained coating directly affects the coating quality and service life. When the anticorrosive coating ages to a certain extent, new coating must be implemented, and first, the corrosion products and aged anticorrosive coating need to be removed. At present, the coating maintenance surface treatment method of in-service equipment, pipelines and steel structures in a refining and chemical enterprise mainly adopts manual cleaning and power tool cleaning, etc. The manual cleaning has low working efficiency and poor cleaning effect, the power tool cleaning has higher efficiency than manual cleaning, but the old coating cannot be completely cleaned, and the cleaning effect is greatly affected by management level, worker technical level and responsibility, etc.

[0003] Most of the existing methods adopt ultrahigh pressure water jet technology. Specifically, when the ultrahigh pressure water jet technology is used for paint and rust removal, the working pressure is high, and the energy in water is finally converted into heat energy, so that the steel plate and water are at a high temperature. After the operation is completed, the surface will quickly dry, so that the flash rust on the surface of the steel plate is within an acceptable range. There are also mechanical treatment methods such as scrapers and brushes, which can achieve good removal effect in a short time.

[0004] Chinese patent CN111872817B discloses a water conservancy construction pipeline outer surface impurity cleaning device, which comprises a mounting frame, wheels, a push handle, a mounting disc, a clamping assembly, a brushing assembly and a power assembly. The wheels are symmetrically installed on the mounting frame. The push handle is installed on the mounting frame. The mounting disc is installed on the mounting frame. The clamping assembly is installed on the mounting disc and clamps by rotating. The brushing assembly is installed on the clamping assembly and brushes by rotating. The power assembly is installed on the mounting frame and provides power by rotating. The clamping assembly can clamp the pipeline to be brushed, the brushing assembly can brush the outer surface of the pipeline, and the nozzle can flush the pipeline during brushing to prevent dust from being too large when brushing the impurities on the outer surface of the pipeline, which is harmful to people's health and has high working quality.

[0005] The above-mentioned patent uses brushing to clean the surface of the water conservancy construction pipeline, but it is only suitable for cleaning pipelines with a single diameter, and manual feeding is required during cleaning to send the pipeline into the mounting disc for processing, and the feeding speed is not easy to control. SUMMARY

[0006] Based on the technical problems existing in the background art, the present application provides a pipeline surface cleaning device and method, through the structural design of the telescopic assembly, the feeding assembly and the arc-shaped cleaning brush, the problems that the device can only clean the pipeline of a single pipe diameter and the pipeline cannot automatically feed are solved, and the complete removal of the pipeline surface coating, rust and other substances is realized.

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0008] The present application claims a pipeline surface cleaning device, which comprises a frame seat, the upper part of the frame seat is in the shape of a horizontal cylinder, a rotating drum is coaxially connected inside the frame seat cylinder, a plurality of arc-shaped cleaning brushes are uniformly installed in the rotating drum, the plurality of arc-shaped cleaning brushes are uniformly distributed along the axis of the rotating drum, and the curvature direction is consistent with that of the rotating drum; a telescopic assembly is connected between the plurality of arc-shaped cleaning brushes and the rotating drum; one end of the rotating drum is an inlet, and the other end is an outlet; a feeding assembly is installed on the frame seat at the inlet end.

[0009] Preferably, the telescopic assembly comprises a rotating disc mounting seat fixed on the rotating drum by sleeving, and a sliding rod connected to each arc-shaped cleaning brush, one end of the sliding rod is fixedly connected to the arc-shaped cleaning brush, the other end of the sliding rod is fixedly connected with a fixed block after sliding through the outside of the rotating drum, and the bottom of the fixed block is fixed with a sliding rod; a toothed rotating disc is sleeved on the rotating disc mounting seat, one side of the toothed rotating disc is attached to the rotating disc mounting seat, and a plurality of rotating disc limiters are fixed on the rotating disc mounting seat on the other side of the toothed rotating disc; a plurality of arc-shaped inclined grooves are uniformly arranged on one side of the toothed rotating disc, and one end of the sliding rod away from the fixed block is slidingly connected in the arc-shaped inclined groove; the outer edge of the toothed rotating disc is engaged with a gear, the gear is fixedly connected with the output end of a second motor, and the second motor is fixed on the rotating disc mounting seat.

[0010] Preferably, one or more circular support frames are arranged on the outer wall of the rotating drum, and a rolling bearing is fixed between the outer edge of each circular support frame and the inner wall of the frame seat; a driven gear is fixed on the outer wall of the rotating drum at the outlet end, the driven gear is engaged with a driving gear, the driving gear is fixedly connected with the output shaft of a first motor, and the first motor is fixed on the frame seat.

[0011] Preferably, the feeding assembly comprises a support outer cylinder fixed vertically on the outside of the frame seat cylinder, a support inner cylinder is sleeved on the support outer cylinder, and the support inner cylinder and the support outer cylinder are telescopically connected; an installation seat is fixed on the top of the support inner cylinder, a roller shaft is horizontally rotatably connected to the installation seat, and the axis of the roller shaft is perpendicular to the axis of the rotating drum; a roller is fixed on the roller shaft, one end of the roller shaft is fixedly connected with the output end of a third speed reducer, and the third speed reducer is fixed on the installation seat.

[0012] Preferably, the arc-shaped cleaning brush comprises an arc-shaped fixed plate, a first brush, a second brush and a wiping block are fixed on the inner arc of the arc-shaped fixed plate in sequence along the axial direction, the first brush is located at the inlet end, and the wiping block is located at the outlet end.

[0013] Preferably, the material of the first brush is steel wire, the material of the second brush is silicon carbide abrasive wire, and the material of the wiping block is sponge.

[0014] Preferably, a micro dust collector is further installed on the inner wall of the rotating drum.

[0015] Preferably, the wiping block is detachably installed between the arc-shaped fixed plate.

[0016] Preferably, the rotating disc mounting base comprises a fixedly connected inner ring and a side ring, the tooth-shaped rotating disc is rotationally connected to the outer wall of the inner ring, one side of the tooth-shaped rotating disc is attached to the side wall of the side ring, and the other side is attached to the rotating disc limiting piece.

[0017] The application also claims a method for cleaning the surface of a pipeline by using the above device, comprising the following steps:

[0018] S1: one end of the pipeline to be treated is placed on the roller, the height of the supporting inner cylinder is adjusted, the pipeline to be treated is located at the center of the plurality of arc-shaped cleaning brushes, then the supporting inner cylinder and the supporting outer cylinder are fixed, and the pipeline to be treated located outside the device is positioned and supported, so that the pipeline to be treated can always be coaxial with the rotating drum;

[0019] S2: the pipeline to be treated is adjusted to approach the inlet, the second motor is started, the second motor drives the gear to mesh with the tooth-shaped rotating disc, the arc-shaped chute rotates along with the rotating drum when the tooth-shaped rotating disc rotates along the outer wall of the rotating drum, at this time, the slide rod slides in the arc-shaped chute, according to the sliding of the slide rod, the arc-shaped cleaning brush is moved forward and backward, and then the plurality of arc-shaped cleaning brushes are adjusted to fully contact the surface of the pipeline to be treated, and the rotation of the second motor is stopped;

[0020] S3: the first motor is driven, the first motor drives the driving gear to mesh with the driven gear, the driven gear drives the rotating drum and the plurality of arc-shaped cleaning brushes to rotate together, at this time, the arc-shaped cleaning brush cleans the surface layer of the pipeline; at the same time, the third speed reducer is driven to drive the roller to rotate towards the inlet, and the pipeline is gradually moved towards the inlet; the pipeline is roughly brushed by the first brush, then finely brushed by the second brush, and finally the surface dust is wiped off by the wiping block, until the whole pipeline is discharged from the outlet, that is, the surface cleaning of the pipeline is completed.

[0021] Compared with the prior art, the application has the following beneficial effects:

[0022] (1) The telescopic component of the present invention is provided with a sliding rod, a fixed block and a sliding rod, and connects the arc-shaped cleaning brush to the rotating drum. When it is necessary to clean the surface of the pipe, the pipe is placed in the middle of multiple arc-shaped cleaning brushes and the second motor is driven. The second motor drives the gear to mesh with the toothed turntable. The toothed turntable rotates left and right along the outer surface of the rotating drum. The arc-shaped groove on the toothed turntable rotates accordingly. The rotation of the arc-shaped groove causes the non-rotating sliding rod to slide back and forth along the arc-shaped groove, thereby realizing that multiple evenly distributed sliding rods drive the arc-shaped cleaning brushes connected to them to move closer to or away from the center of the rotating drum. When the arc-shaped cleaning brush is adjusted to be able to fully contact the surface of the pipe, the rotation of the first motor is stopped. The telescopic component realizes the function of cleaning the surface of pipes of different diameters and improves the practicality of the device.

[0023] (2) This invention uses gear meshing to make the rotating drum drive the arc-shaped cleaning brush to rotate, and the automatic feeding component feeds the pipe. The first bristles of the arc-shaped cleaning brush can remove the aged anti-corrosion coating and corroded rust on the pipe surface. The second bristles perform fine brushing to completely remove impurities from the pipe surface. Finally, the pipe surface is wiped by the wiping block to thoroughly clean the pipe surface and prevent rust and dust from causing the pipe to rust again and affecting the treatment effect. Through the feeding component, the rotation of the arc-shaped cleaning brush and the design of the arc-shaped cleaning brush, the functions of automatic pipe feeding and thorough cleaning of the pipe surface are realized, and the cleaning effect is good. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the inlet end of a pipe surface cleaning device according to the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the telescopic component of a pipe surface cleaning device according to the present invention;

[0026] Figure 3 This is a schematic diagram of the overall structure of the discharge port end of a pipe surface cleaning device according to the present invention;

[0027] Figure 4 This is an exploded structural diagram of the rotary table mounting base of a pipe surface cleaning device according to the present invention;

[0028] Figure 5 This is a schematic diagram of the overall structure of the feeding assembly of a pipe surface cleaning device according to the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the arc-shaped cleaning brush of the pipe surface cleaning device of the present invention.

[0030] Figure 7 This invention relates to an arc-shaped cleaning brush in a pipe surface cleaning device. Figure 2 A partially enlarged structural diagram.

[0031] The components are as follows: 1. Frame; 2. Rotary drum; 3. Arc-shaped cleaning brush; 4. Telescopic assembly; 5. Feeding assembly; 6. Inlet; 7. Outlet; 8. Circular support frame; 9. Rolling bearing; 10. Driven gear; 11. Drive gear; 12. First motor; 13. Outer support cylinder; 14. Inner support cylinder; 15. Mounting base; 16. Roller; 17. Roller shaft; 18. Third geared motor; 19. Miniature vacuum cleaner; 41. Turntable mounting base; 42. Toothed turntable; 43. Turntable limiting component; 44. Arc-shaped inclined groove; 45. Gear; 46. Sliding rod; 47. Fixing block; 48. Sliding rod; 49. Second motor; 31. First brush bristles; 32. Second brush bristles; 33. Wiping block; 34. Fixing plate; 411. Inner ring; 412. Side ring. Detailed Implementation

[0032] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Furthermore, the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0033] Example 1

[0034] like Figures 1-6 As shown, a pipe surface cleaning device includes a frame 1, the upper part of which is a transverse cylindrical shape. A rotating cylinder 2 is coaxially rotatably connected inside the cylindrical body of the frame 1. Multiple arc-shaped cleaning brushes 3 are evenly distributed inside the rotating cylinder 2, and the multiple arc-shaped cleaning brushes 3 are evenly distributed along the axis of the rotating cylinder 2, with the arc direction consistent with the rotating cylinder 2. A telescopic component 4 connects the multiple arc-shaped cleaning brushes 3 to the rotating cylinder 2. One end of the rotating cylinder 2 is a feed port 6, and the other end is a discharge port 7. A feeding component 5 is installed on the frame 1 located at the feed port 6 end.

[0035] The rotating drum 2 is coaxially rotatably connected to the frame 1. The rotating drum 2 can rotate, and when the rotating drum 2 rotates, it can drive multiple arc-shaped cleaning brushes 3 to rotate simultaneously. When using the device to clean the surface of the pipe, the pipe enters from the inlet 6 end and exits from the outlet 7 end. The feeding assembly 5 is used to feed the pipe that needs to be cleaned from the inlet 6 end into the middle of multiple arc-shaped cleaning brushes 3.

[0036] In this embodiment, the telescopic assembly 4 includes a turntable mounting base 41 sleeved and fixed on the rotating drum 2, and a sliding rod 46 connected to each arc-shaped cleaning brush 3. One end of the sliding rod 46 is fixedly connected to the arc-shaped cleaning brush 3, and the other end of the sliding rod 46 slides through to the outside of the rotating drum 2 and is fixedly connected to a fixing block 47. A sliding rod 48 is fixed to the bottom of the fixing block 47. A toothed turntable 42 is sleeved on the turntable mounting base 41, and one side of the toothed turntable 42 is connected to the turntable mounting base 41. 1. A plurality of turntable limiting members 43 are fixed on the turntable mounting base 41 on the other side of the toothed turntable 42; a plurality of arc-shaped inclined grooves 44 are evenly distributed on the toothed turntable 42 on one side of the turntable limiting members 43, and the end of the slide rod 48 away from the fixing block 47 is slidably connected in the arc-shaped inclined groove 44; a gear 45 is meshed on the outer edge of the toothed turntable 42, and the gear 45 is fixedly connected to the output end of the second motor 49, which is fixed on the turntable mounting base 41.

[0037] The telescopic component 4 is used to bring together or disperse multiple arc-shaped cleaning brushes 3 along the axis of the rotating drum 2 towards the center, so as to place different pipes in the middle of the arc-shaped cleaning brushes 3 for brushing and cleaning the pipe surface. Specifically, when it is necessary to clean the surface of the pipe, the pipe is placed in the middle of multiple arc-shaped cleaning brushes 3, and the second motor 49 is driven. The second motor 49 drives the gear 45 to mesh with the toothed turntable 42. The toothed turntable 42 rotates left and right along the outer surface of the rotating drum 2, and the arc-shaped inclined groove 44 on the toothed turntable 42 rotates accordingly. The rotation of the arc-shaped inclined groove 44 causes the non-rotating slide rod 48 to slide back and forth along the arc-shaped inclined groove 44, so that the multiple evenly distributed slide rods 46 drive the arc-shaped cleaning brushes 3 connected to them to move closer to or away from the center of the rotating drum 2, realizing the function of the arc-shaped cleaning brushes 3 to clean the surface of pipes of different diameters.

[0038] It should be noted that during device operation, there is no interference between the evenly distributed multiple arc-shaped inclined grooves 44 and the multiple turntable limiting components 43; the second motor 49 is a bidirectional rotating motor, and when the second motor 49 drives the toothed turntable 42 to rotate, the rotation range is determined by the length of the arc-shaped inclined grooves 44; furthermore, a battery needs to be installed on the outer wall of the rotating drum 2 to power the second motor 49, so as to avoid the second motor 49 being connected to an external power source, causing the rotating drum 2 to rotate and affecting its use.

[0039] In this embodiment, one or more circular support frames 8 are provided on the outer wall of the rotating drum 2, and a rolling bearing 9 is fixed between the outer edge of each circular support frame 8 and the inner wall of the frame 1; a driven gear 10 is fixed on the outer wall of the rotating drum 2 located at the discharge port 7 end, the driven gear 10 meshes with a driving gear 11, the driving gear 11 is fixedly connected to the output shaft of the first motor 12, and the first motor 12 is fixed on the frame 1.

[0040] The rotating drum 2 and the frame 1 are rotatably connected by a circular support frame 8 and a rolling bearing 9. Specifically, one or more sets of circular support frames 8 and rolling bearings 9 can be set according to actual needs to ensure the stability between the rotating drum 2 and the frame 1. The first motor 12 drives the driving gear 11 to mesh with the driven gear 10 fixed on the outer wall of the rotating drum 2, realizing the rotation function of the rotating drum 2 and providing support and power for the rotation of the arc-shaped cleaning brush 3.

[0041] In this embodiment, the feeding assembly 5 includes a supporting outer cylinder 13 vertically fixed to the outside of the frame 1 cylinder body, a supporting inner cylinder 14 sleeved on the supporting outer cylinder 13, and the supporting inner cylinder 14 and the supporting outer cylinder 13 are telescopically connected; a mounting base 15 is fixed to the top of the supporting inner cylinder 14, and a roller shaft 17 is horizontally rotatably connected to the mounting base 15, the axis of the roller shaft 17 being perpendicular to the axis of the rotating drum 2; a roller 16 is fixed on the roller shaft 17, and one end of the roller shaft 17 is fixedly connected to the output end of a third reduction motor 18, the third reduction motor 18 being fixed on the mounting base 15.

[0042] The outer support cylinder 13 and the inner support cylinder 14 are connected by a telescopic mechanism, enabling the lifting function of the mounting base 15. The height of the mounting base 15 needs to be adjusted according to the outer diameter of the pipe to be processed, ensuring that the pipe is horizontally aligned with the axis of the rotating drum 2. A roller shaft 17 is horizontally rotatably connected to the mounting base 15, and a roller 16 is fixed on the roller shaft 17. The axis of the roller shaft 17 is perpendicular to the axis of the rotating drum 2. When the third reduction motor 18 drives the roller shaft 17 to rotate, it can drive the roller 16 to rotate towards the rotating drum 2, conveying the pipe towards the rotating drum 2, thus achieving the feeding function. Specifically, when setting up the conveying system, the pipe located at the inlet side needs to be handheld or positioned for support to ensure that the pipe is always coaxial with the rotating drum, preventing the pipe from deviating or becoming non-horizontal, which would affect the operation and processing effect.

[0043] It should be noted that the supporting outer cylinder 13 and the supporting inner cylinder 14 can be raised and lowered by sliding and fixed by a pin, or by gear and rack meshing transmission, or other methods. These are all existing technologies and will not be elaborated here.

[0044] In this embodiment, multiple arc-shaped cleaning brushes 3 are evenly distributed along the axis of the rotating drum 2, and the arc direction is consistent with the rotating drum 2; the arc-shaped cleaning brush 3 includes an arc-shaped fixing plate 34, and a first brush bristle 31, a second brush bristle 32 and a wiping block 33 are axially fixed on the inner arc of the arc-shaped fixing plate 34 in sequence. The first brush bristle 31 is located at the feed port 6 end, and the wiping block 33 is located at the discharge port 7 end.

[0045] Both the first bristle 31 and the second bristle 32 are fixed to the inner arc sidewall of the arc-shaped fixing plate 34 by plugging. The first bristle 31 is a dense steel wire bristle, which can brush away the aging anti-corrosion coating and corroded rust on the pipe surface. The second bristle 32 is a silicon carbide abrasive filament bristle, which can perform fine brushing to thoroughly remove impurities from the pipe surface. Finally, the pipe surface is wiped by the wiping block 33 to thoroughly clean the pipe surface and prevent rust and dust from causing the pipe to rust again. Furthermore, during use, the feeding speed of the feeding component 5 and the rotation speed of the drum 2 can be controlled to ensure that the pipe surface is thoroughly cleaned.

[0046] In this embodiment, the first bristle 31 is made of steel wire, the second bristle 32 is made of silicon carbide abrasive filament, and the wiping block 33 is made of sponge.

[0047] In this embodiment, a miniature vacuum cleaner 19 is also installed on the inner wall of the rotating drum 2.

[0048] During use, brushing the pipe surface will cause old coatings, rust, etc. to fly around dust and debris. The mini vacuum cleaner 19 can pick up the dust and debris to avoid causing air pollution in the surrounding area.

[0049] In this embodiment, the wiping block 33 and the arc-shaped fixing plate 34 are detachably installed.

[0050] The wiping block 33 can be installed on the arc-shaped fixing plate 34 by plugging, snapping, or embedding. This makes it easy to disassemble and replace the wiping block when it is covered with dust and cannot be wiped clean after a period of use, thus increasing the cleanliness of the pipe surface.

[0051] In this embodiment, the turntable mounting base 41 includes an inner ring 411 and a side ring 412 that are fixedly connected. The toothed turntable 42 is rotatably connected to the outer wall of the inner ring 411. One side of the toothed turntable 42 is attached to the side wall of the side ring 412, and the other side is attached to the turntable limiting member 43.

[0052] The toothed turntable 42 is axially positioned by the side ring 412 and the turntable limiting member 43. The toothed turntable 42 is rotatably connected to the outer wall of the inner ring 411. Furthermore, a bearing can be fixed between the outer wall of the inner ring 411 and the inner ring of the toothed turntable 42 to make the toothed turntable 42 rotate more nimbly.

[0053] Example 2

[0054] A method for cleaning the surface of a pipe using the apparatus of Embodiment 1 includes the following steps:

[0055] S1: Place one end of the pipe to be treated on the roller 16, adjust the height of the inner support cylinder 14 so that the pipe to be treated is located at the center of multiple arc-shaped cleaning brushes 3, fix the inner support cylinder 14 and the outer support cylinder 13, and position and support the pipe to be treated located outside the device so that the pipe to be treated can always be coaxial with the rotating drum 2.

[0056] S2: Adjust the pipe to be treated to move closer to the feed inlet 6, turn on the second motor 49, the second motor 49 drives the gear 45 to mesh with the toothed turntable 42. When the toothed turntable 42 rotates along the outer wall of the rotating drum 2, the arc-shaped inclined groove 44 rotates accordingly. At this time, the slide rod 48 slides in the arc-shaped inclined groove 44. According to the sliding of the slide rod 48, the slide rod 46 drives the arc-shaped cleaning brush 3 to move back and forth, thereby adjusting the multiple arc-shaped cleaning brushes 3 to fully contact the surface of the pipe to be treated, and then stop the second motor 49 from rotating.

[0057] S3: Drive the first motor 12, which drives the drive gear 11 to mesh with the driven gear 10. The driven gear 10 drives the rotating drum 2 and multiple arc-shaped cleaning brushes 3 to rotate together. At this time, the arc-shaped cleaning brushes 3 clean the surface of the pipe. At the same time, drive the third reduction motor 18 to drive the roller 16 to rotate towards the feed port 6, and move the pipe to be treated gradually towards the feed port 6. The pipe to be treated is coarsely brushed by the first brush bristles 31, then finely brushed by the second brush bristles 32, and finally wiped off the surface dust by the wiping block 33 until the entire pipe is discharged from the discharge port 7, thus completing the surface cleaning of the pipe.

[0058] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A pipeline surface cleaning device comprising a carrier (1), characterized in that: The upper part of the frame seat (1) is a transverse cylinder, the frame seat (1) is coaxially connected with a rotating drum (2) inside the cylinder, a plurality of arc-shaped cleaning brushes (3) are evenly arranged in the rotating drum (2), the arc-shaped cleaning brushes (3) are evenly arranged along the axis of the rotating drum (2) and the arc direction is consistent with the rotating drum (2); the arc-shaped cleaning brushes (3) are connected with the rotating drum (2) through a telescopic assembly (4); one end of the rotating drum (2) is a feeding port (6), and the other end is a discharging port (7); the frame seat (1) at the feeding port (6) is provided with a feeding assembly (5).

2. A pipeline surface cleaning device according to claim 1, characterised in that: The telescopic assembly (4) comprises a rotating disc mounting base (41) fixed on the rotating drum (2) and a sliding rod (46) connected with each arc-shaped cleaning brush (3), one end of the sliding rod (46) is fixedly connected with the arc-shaped cleaning brush (3), the other end of the sliding rod (46) is fixedly connected with a fixed block (47) after sliding through the rotating drum (2) to the outside, and the bottom of the fixed block (47) is fixedly connected with a sliding rod (48); the rotating disc mounting base (41) is sleeved with a toothed rotating disc (42), one side of the toothed rotating disc (42) is attached to the rotating disc mounting base (41), a plurality of rotating disc limiters (43) are fixedly arranged on the rotating disc mounting base (41) on the other side of the toothed rotating disc (42); a plurality of arc-shaped inclined grooves (44) are evenly arranged on the toothed rotating disc (42) on one side of the rotating disc limiter (43), and one end of the sliding rod (48) away from the fixed block (47) is slidingly connected in the arc-shaped inclined groove (44); the outer edge of the toothed rotating disc (42) is engaged with a gear (45), the gear (45) is fixedly connected with the output end of a second motor (49), and the second motor (49) is fixedly arranged on the rotating disc mounting base (41).

3. A pipeline surface cleaning device according to claim 1, wherein: One or more circular support frames (8) are arranged on the outer wall of the rotating drum (2), and a rolling bearing (9) is fixed between the outer edge of each circular support frame (8) and the inner wall of the frame seat (1); a driven gear (10) is fixed on the outer wall of the rotating drum (2) at the discharging port (7), the driven gear (10) is engaged with a driving gear (11), the driving gear (11) is fixedly connected with the output shaft of a first motor (12), and the first motor (12) is fixed on the frame seat (1).

4. A pipeline surface cleaning device according to claim 1, wherein: The feeding assembly (5) comprises a supporting outer cylinder (13) fixed vertically on the outer side of the frame seat (1) cylinder, a supporting inner cylinder (14) is sleeved on the supporting outer cylinder (13), and the supporting inner cylinder (14) and the supporting outer cylinder (13) are telescopically connected; an installation base (15) is fixedly arranged on the top of the supporting inner cylinder (14), a roller shaft (17) is horizontally rotatably connected to the installation base (15), the axis of the roller shaft (17) is perpendicular to the axis of the rotating drum (2); a roller (16) is fixedly arranged on the roller shaft (17), one end of the roller shaft (17) is fixedly connected with the output end of a third speed reducer (18), and the third speed reducer (18) is fixedly arranged on the installation base (15).

5. A pipeline surface cleaning device according to claim 1, wherein: The arc-shaped cleaning brush (3) comprises an arc-shaped fixed plate (34), the inner arc of the arc-shaped fixed plate (34) is axially sequentially fixed with a first brush (31), a second brush (32) and a wiping block (33), the first brush (31) is located at the end of the feeding port (6), and the wiping block (33) is located at the end of the discharging port (7).

6. A pipeline surface cleaning device according to claim 5, wherein: The material of the first brush (31) is steel wire, the material of the second brush (32) is silicon carbide abrasive wire, and the material of the wiping block (33) is sponge.

7. A pipeline surface cleaning device according to claim 1, wherein: A micro dust collector (19) is further installed on the inner wall of the rotating drum (2).

8. A pipeline surface cleaning device according to claim 5, wherein: The wiping block (33) and the arc-shaped fixed plate (34) are detachably installed.

9. A pipeline surface cleaning device according to claim 2, wherein: The rotating disc mounting seat (41) comprises an inner ring (411) and a side ring (412) which are fixedly connected, the tooth-shaped rotating disc (42) is rotationally connected to the outer wall of the inner ring (411), one side of the tooth-shaped rotating disc (42) abuts against the side wall of the side ring (412), and the other side abuts against the rotating disc limiting piece (43).

10. A method of pipeline surface cleaning comprising the use of the cleaning device of any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1: one end of the pipeline to be treated is placed on the roller (16), the height of the supporting inner cylinder (14) is adjusted, the pipeline to be treated is located at the center of the plurality of arc-shaped cleaning brushes (3), then the supporting inner cylinder (14) and the supporting outer cylinder (13) are fixed, and the pipeline to be treated located outside the device is positioned and supported, so that the pipeline to be treated can always be coaxial with the rotating drum (2); S2: the pipeline to be treated is adjusted to approach the feeding port (6), the second motor (49) is started, the second motor (49) drives the gear (45) to mesh with the tooth-shaped rotating disc (42), when the tooth-shaped rotating disc (42) rotates along the outer wall of the rotating drum (2), the arc-shaped chute (44) rotates, at this time, the slide rod (48) slides in the arc-shaped chute (44), according to the sliding of the slide rod (48), the slide rod (46) drives the arc-shaped cleaning brush (3) to move forward and backward, and then the plurality of arc-shaped cleaning brushes (3) are adjusted to fully contact the surface of the pipeline to be treated, and then the rotation of the second motor (49) is stopped; S3: the first motor (12) is driven, the first motor (12) drives the driving gear (11) to mesh with the driven gear (10), the driven gear (10) drives the rotating drum (2) and the plurality of arc-shaped cleaning brushes (3) to rotate together, at this time, the arc-shaped cleaning brush cleans the surface layer of the pipeline to be treated; at the same time, the third speed reducer (18) is driven to drive the roller (16) to rotate towards the feeding port (6), so that the pipeline to be treated is gradually moved towards the feeding port (6); the pipeline is roughly brushed by the first brush (31), then finely brushed by the second brush (32), and finally the surface dust is wiped by the wiping block (33), until the whole pipeline is discharged from the discharging port (7), that is, the surface cleaning of the pipeline is completed.

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