Pipe surface online grinding and polishing device

Abstract

The invention discloses an online grinding and polishing device for the surface of a pipe. The online grinding and polishing device comprises a base frame, a clamping device, a bearing assembly, a power assembly, a cleaning assembly, a driving device and a grinding assembly. The base frame is slidably connected with a movable plate and fixedly connected with a fixed plate. The clamping device comprises a fixed part fixedly connected to the movable plate and a rotating part movably connected to the fixed plate, and an adjusting lead screw assembly is arranged on the side face of the movable rod so as to drive the movable plate and the fixed part to move and be used for clamping or loosening the pipe; the bearing assembly is rotationally arranged between the movable plate and the fixed plate and used for containing a to-be-clamped pipe. The power assembly is arranged on the fixed plate and is in meshed connection with the rotating part so as to drive the rotating part to rotate; the driving device is arranged on the side face of the moving plate, the grinding assembly is arranged on the driving device, and the driving device can move to the position between the clamping devices so that the grinding assembly can grind and polish the inner and outer surfaces of the pipe.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, specifically to an online grinding and polishing device for pipe surfaces. Background Technology

[0002] Titanium alloy tubing is widely used in aerospace, shipbuilding, and chemical industries due to its excellent specific strength, corrosion resistance, and antibacterial properties. However, during the processing and forming of titanium alloy tubing, impurities, burrs, and oxide scale inevitably remain on the inner and outer surfaces. These defects not only affect the surface quality and aesthetics of the tubing but also make grinding and polishing of the inner and outer walls a crucial step in ensuring the final product quality and performance.

[0003] Currently, the grinding and polishing of titanium alloy pipes mainly involves grinding and polishing the inner and outer walls separately, that is, grinding and polishing the inner wall of the pipe first, and then grinding and polishing the outer wall, or vice versa. This polishing method has the disadvantages of low efficiency and high cost; moreover, the grinding and polishing process also produces debris, which pollutes the grinding environment. If workers are exposed to this environment for a long time, it will affect their health. Therefore, this invention provides an online grinding and polishing device for pipe surfaces. Summary of the Invention

[0004] The purpose of this invention is to provide an online grinding and polishing device for pipe surfaces, so as to solve the problem mentioned in the background art that it is impossible to grind the inner and outer surfaces of titanium alloy pipes at the same time.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An online grinding and polishing device for pipe surfaces includes a base frame, a clamping device, a load-bearing component, a power component, a cleaning component, a drive device, and a grinding component. A movable plate is slidably connected to the base frame, and a fixed plate is fixedly connected to it. The clamping device includes a fixed part fixedly connected to the movable plate and a rotating part movably connected to the fixed plate. An adjusting screw assembly is provided on the side of the movable plate to drive the movable plate and the fixed part to move, for clamping or releasing the pipe. The load-bearing component is rotatably disposed between the movable plate and the fixed plate for placing the pipe to be clamped. The power component is disposed on the fixed plate and meshes with the rotating part to drive the rotating part to rotate. The cleaning component is fixedly connected to the base frame below the load-bearing component for collecting debris falling during pipe grinding. The drive device is disposed on the side of the movable plate, and the grinding component is disposed on the drive device. The drive device can move between the clamping devices, allowing the grinding component to grind and polish the inner and outer surfaces of the pipe.

[0006] The fixing part includes a fixing ring fixedly connected to the moving plate and an abutting part fixedly connected to the fixing ring; the abutting part has a tapered cross section, and the surface of the abutting part is used to abut against the end of the pipe; the moving plate is also provided with a moving hole corresponding to the driving device and the grinding assembly, and the part of the driving device and the grinding assembly that overlaps with the fixing ring and the abutting part is further penetrated by the moving hole.

[0007] The rotating part includes a rotating ring, a limiting rod, and a screw on the rotating connecting fixed plate; the rotating ring has a sliding hole in the middle that matches the maximum diameter of the abutment part; the screw passes through and is threaded to the fixed plate, and is rotatably connected to the limiting rod.

[0008] The limiting rod includes a V-shaped abutment rod and a moving rod; the maximum width of the opening side of the abutment rod matches the diameter of the sliding hole; one end of the moving rod is fixedly connected to the abutment rod, and the other end is rotatably connected to the screw; the drive end of the power component is engaged with the rotating ring.

[0009] The load-bearing assembly includes a pair of load-bearing plates and a second motor. The two ends of each pair of load-bearing plates are rotatably connected to a moving plate and a fixed plate, respectively, and the load-bearing plates at the same end are meshed with each other. The drive shaft of the second motor is fixedly connected to the load-bearing plates, thereby driving the pair of load-bearing plates to rotate in opposite or the same direction.

[0010] Each load-bearing plate includes a telescopic plate, a pair of connecting rods at both ends of the telescopic plate, and a pair of rotating wheels; the two ends of the connecting rods are fixedly connected to the telescopic plate and the rotating wheels respectively, and the pair of rotating wheels are rotatably connected to the movable plate and the fixed plate respectively, and the two adjacent rotating wheels are meshed with each other; the second motor is fixedly connected to any rotating wheel on the movable plate.

[0011] The cleaning assembly includes a collection plate with a collection chamber and a collection tube; the collection plate is inclined, and a collection hole communicating with the collection chamber is opened on the upper side of the collection plate, and the collection tube is fixedly connected to the lower side of the collection plate.

[0012] The drive unit has a pair of L-shaped sliding rods on both sides; the drive unit includes a balance plate, a sliding plate, a pair of lifting components located on both sides of the pair of sliding plates, and a grinding screw assembly; each pair of lifting components is slidably connected to the sliding plate on the same side and fixedly connected to the balance plate; the two pairs of lifting components are connected to the balance plate and the sliding plate, and the lifting components are fixedly connected to the sliding rods on the same side; the grinding screw assembly is located at the bottom of the sliding plate to drive the sliding plate to move.

[0013] Each lifting assembly includes multiple pairs of hydraulic cylinders, multiple fixed frames, and a pair of support plates slidably connected to both sides of the sliding plate; each fixed frame fixes a pair of hydraulic cylinders and is fixedly connected to the sliding rod; each pair of hydraulic cylinders is arranged in opposite directions, so that the drive end of each pair of hydraulic cylinders is fixedly connected to the balance plate and the support plate respectively, thereby controlling the lifting of the balance plate and the sliding plate independently.

[0014] The grinding assembly includes a grinding wheel and a grinding rod; the grinding wheel is fixedly connected to the end of the sliding plate near the moving plate; the grinding rod is slidably connected to the underside of the balance plate; a telescopic rod is also provided between the ends of the balance plate and the sliding plate away from the grinding wheel; the two ends of the telescopic rod are fixedly connected to the sliding plate and the grinding rod, respectively.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This system enables simultaneous grinding of the inner and outer surfaces of titanium alloy tubes. Through precise positioning by the drive unit, the grinding wheel and grinding rod can simultaneously extend into both sides of the titanium alloy tube. Driven indirectly by a hydraulic cylinder, the grinding rod and grinding wheel simultaneously contact the inner and outer surfaces of the titanium alloy tube. Then, the power assembly drives the titanium alloy tube to rotate, thus achieving synchronous, continuous, and automated grinding of the inner and outer surfaces of the titanium alloy tube. This improves processing efficiency. Furthermore, the contact between the grinding rod and the lower inner wall of the titanium alloy tube effectively avoids the possibility of deformation due to excessive insertion of the grinding rod into the tube, ensuring grinding quality.

[0016] It can grind titanium alloy tubes of different specifications; by moving the movable plate, it can clamp titanium alloy tubes of different lengths; and by using the cooperation of the tapered ground joint and the V-shaped abutment rod, it can limit and clamp titanium alloy tubes of different diameters. Furthermore, it requires low labor intensity; only the titanium alloy tube needs to be placed in the placement area, and manual operation is required. Other steps, such as clamping, rotating, grinding, and debris collection, can be completed automatically.

[0017] It ensures the health of operators; the collection plate can collect debris falling from the outer surface of the titanium alloy pipe in real time, which not only prevents workers from inhaling it and causing harm to their bodies, but also keeps the working environment clean and tidy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the connection between the fixing part and the moving plate of the present invention; Figure 4 This is a plan view of the connection between the movable plate and the supporting component of the present invention; Figure 5 For the present invention Figure 4 Enlarged plan view of the load-bearing component at point A (the thick line indicates the outline of the moving hole); Figure 6 This is an exploded view of the load-bearing component structure of the present invention; Figure 7 This is a schematic diagram of the connection between the fixing part and the moving plate of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of the connection between the movable plate and the fixed part at point B; Figure 9 This is a schematic diagram of the connection between the rotating part and the fixed plate of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of the connection between the rotating part and the fixed plate at point C; Figure 11 This is a cross-sectional view of the connection between the rotating part and the fixed plate of the present invention; Figure 12 For the present invention Figure 10 Enlarged cross-sectional view of the connection between the rotating part and the fixed plate at point D; Figure 13 This is a schematic diagram of the connection between the drive device and the sliding rod of the present invention; Figure 14 For the present invention Figure 13 Enlarged view of the connection between the lifting assembly and the balance plate at point E in the middle; Figure 15 This is a schematic diagram of the connection between the telescopic rod and the balance plate and sliding plate of the present invention; Figure 16 This is a disassembled diagram of the drive device structure of the present invention; Figure 17 This is a disassembled plan view of the drive device structure of the present invention.

[0019] In the diagram: Base frame 1, Moving plate 11, Moving hole 111, Fixed plate 12, Adjusting screw assembly 13, Sliding rod 14, Clamping device 2, Fixed part 21, Fixed ring 211, Abutting part 212, Rotating part 22, Rotating ring 221, Sliding hole 2211, Limiting rod 222, Abutting rod 2221, Moving rod 2222, Screw 223, Bearing assembly 3, Bearing plate 31, Telescopic plate 311, Connecting rod 312, Rotating wheel 313, Second motor 32, Power assembly 4, Gear 41, First motor 42, Cleaning assembly 5, Collecting plate 51, Collecting pipe 52, Drive device 6, Balance plate 61, Sliding plate 62, Lifting assembly 63, Hydraulic cylinder 631, Fixed frame 632, Bearing plate 633, Grinding screw assembly 64, Telescopic rod 65, Grinding assembly 7, Grinding wheel 71, Grinding wheel 711, Third motor 712, Grinding rod 72. Detailed Implementation

[0020] Example 1:

[0021] Please see Figures 1-17 The present invention provides a technical solution: such as Figures 1-3As shown, an online grinding and polishing device for pipe surfaces includes a base frame 1, a clamping device 2, a bearing assembly 3, a power assembly 4, a cleaning assembly 5, a drive device 6, and a grinding assembly 7. A movable plate 11 is slidably connected to the base frame 1, and a fixed plate 12 is fixedly connected to it. The clamping device 2 includes a fixed part 21 fixedly connected to the movable plate 11 and a rotating part 22 movably connected to the fixed plate 12. The movable plate 11 can move towards the fixed plate 12, thereby driving the fixed part 21 to move towards the rotating part 22, thus clamping the titanium alloy pipe. The bearing assembly... The 3 is rotatably positioned between the moving plate 11 and the fixed plate 12 for placing the titanium alloy tube to be clamped; the power assembly 4 is mounted on the fixed plate 12 and meshes with the rotating part 22 to drive the rotating part 22 to rotate; the cleaning assembly 5 is fixedly connected to the base frame 1 below the bearing assembly 3 for collecting the debris that falls during the polishing of the titanium alloy tube; the drive device 6 is mounted on the side of the moving plate 11, and the polishing assembly 7 is mounted on the drive device 6. The drive device 6 can move between the clamping devices 2 so that the polishing assembly 7 can polish the inner and outer surfaces of the titanium alloy tube.

[0022] An adjusting screw assembly 13 is also provided on the side of the movable plate 11. The adjusting screw assembly 13 is fixedly connected to the base frame 1, and the moving part of the adjusting screw assembly 13 is fixedly connected to the side of the movable plate 11 to drive the movable plate 11 to move, thereby adjusting the distance between the movable plate 11 and the fixed plate 12 to adapt to titanium alloy tubes of different lengths.

[0023] like Figures 4-12 As shown, the fixing part 21 includes a fixing ring 211 and an abutment part 212. The fixing ring 211 is fixedly connected to the moving plate 11, and the abutment part 212 is fixedly connected to the middle of the fixing ring 211. The abutment part 212 has a tapered cross-section, and its surface is used to abut against the end of the titanium alloy tube. Titanium alloy tubes of different diameters abut against different positions on the surface of the abutment part 212, thereby enabling the clamping and grinding of titanium alloy tubes of different diameters. The moving plate 11 is also provided with a moving hole 111 corresponding to the driving device 6 and the grinding assembly 7, so that the driving device 6 can drive the grinding assembly 7 to move between the moving plate 11 and the fixing plate 12; and the overlapping parts of the driving device 6 and the grinding assembly 7 with the fixing ring 211 and the abutment part 212 are further penetrated by the moving hole 111 (see Figure 8 ).

[0024] The rotating part 22 includes a rotating ring 221, a limiting rod 222, and a screw 223. The rotating ring 221 is rotatably connected to the fixed plate 12 and is coaxially arranged with the fixed ring 211. A sliding hole 2211 matching the maximum diameter of the abutment part 212 is opened in the middle of the rotating ring 221. The limiting rod 222 includes an abutment rod 2221 and a moving rod 2222. The abutment rod 2221 has a V-shaped cross section for abutting with the end of the pipe. The maximum width of the opening side of the abutment rod 2221 matches the diameter of the sliding hole 2211, so that the abutment rod 2221 can enter the sliding hole 2211. One end of the moving rod 2222 is fixedly connected to the abutment rod 2221, and the other end is rotatably connected to the screw 223. The screw 223 is threadedly connected to the screw hole in the fixed plate 12. The rotation of the screw 223 drives the moving rod 2222 and the abutment rod 2221 to move, thereby adjusting the width of the abutment rod 2221 protruding outside the sliding hole 2211 to match the diameter of the corresponding titanium alloy tube, so that the end of the titanium alloy tube passes through the abutment rod 2221 and abuts against the rotating ring 221.

[0025] The power assembly 4 includes a gear 41 and a first motor 42. The gear 41 is disposed on the side of the rotating ring 221 and meshes with the rotating ring 221. The first motor 42 is disposed on the side of the fixed plate 12 away from the rotating ring 221. The drive end of the first motor 42 passes through the fixed plate 12 and is fixedly connected to the gear 41 to drive the gear 41 to rotate, thereby driving the rotating ring 221 and the titanium alloy tube that abuts against the rotating ring 221 to rotate.

[0026] The support assembly 3 includes a pair of support plates 31 and a second motor 32. The two ends of each pair of support plates 31 are rotatably connected to the moving plate 11 and the fixed plate 12, respectively, and the support plates 31 at the same end are meshed with each other. The drive shaft of the second motor 32 passes through the moving plate 11 and is fixedly connected to the support plates 31, thereby driving the pair of support plates 31 to rotate in opposite or the same direction. When the pair of support plates 31 rotate in the same direction until they are in contact, a V-shaped placement area is formed to support the titanium alloy tube to be polished. When the support plates 31 are rotated in the opposite direction, they are disengaged from the titanium alloy tube to facilitate polishing.

[0027] Each supporting plate 31 includes a telescopic plate 311, a pair of connecting rods 312, and a pair of rotating wheels 313. The pair of connecting rods 312 are respectively disposed at both ends of the telescopic plate 311, and both ends of each connecting rod 312 are fixedly connected to the telescopic plate 311 and the rotating wheel 313, respectively. The pair of rotating wheels 313 are rotatably connected to the movable plate 11 and the fixed plate 12, respectively, and the two rotating wheels 313 located at the same end of the telescopic plate 311 are meshed together. The second motor 32 is fixedly connected to any rotating wheel 313 on the movable plate 11, thereby driving the corresponding rotating wheel 313 to rotate.

[0028] like Figure 4 and Figure 1As shown, the cleaning assembly 5 includes a collection plate 51 with a collection chamber and a collection pipe 52. The collection plate 51 is inclined so that the polished titanium alloy tube can automatically slide out of the base frame 1 through the inclined surface of the collection plate 51. A collection hole communicating with the collection chamber is provided on the upper side of the collection plate 51, and the collection pipe 52 is fixedly connected to the lower side of the collection plate 51. The collection pipe 52 is used to connect to a suction device to suck the debris falling from the polished titanium alloy tube into the collection chamber 51, preventing debris from contaminating the working environment. The suction device, such as a vacuum pump, can be selected according to the actual situation.

[0029] like Figures 13-17 As shown, a pair of L-shaped sliding rods 14 are slidably connected to the side of the movable plate 11 away from the fixed ring 211; the driving device 6 is disposed between the pair of sliding rods 14.

[0030] The drive device 6 includes a balance plate 61, a sliding plate 62, a pair of lifting components 63 located on both sides of the sliding plates 62, and a grinding screw assembly 64. Each pair of lifting components 63 is slidably connected to the side of the sliding plate 62 on the same side and fixedly connected to the side of the balance plate 61. The two pairs of lifting components 63 move up and down synchronously, and can independently control the raising and lowering of the balance plate 61 or the sliding plate 62. The lifting components 63 are fixedly connected to the sliding rod 14 on the same side. The grinding screw assembly 64 is located at the bottom of the sliding plate 62 to drive the sliding plate 62 to move. The grinding screw assembly 64 is a conventional technical means and will not be described in detail.

[0031] Each lifting assembly 63 includes multiple pairs of hydraulic cylinders 631, multiple fixing frames 632, and a pair of support plates 633. Each fixing frame 632 fixes a pair of hydraulic cylinders 631 together, and the fixing frame 632 is fixedly connected to the transverse portion of the sliding rod 14. A pair of support plates 633 are slidably connected to both sides of the sliding plate 62. Each pair of hydraulic cylinders 631 is arranged in opposite directions, such that the driving end of each pair of hydraulic cylinders 631 is fixedly connected to the balance plate 61 and the support plate 633 respectively, thereby controlling the lifting of the balance plate 61 and the sliding plate 62 independently.

[0032] The grinding assembly 7 includes a grinding wheel 71 and a grinding rod 72. The grinding wheel 71 is fixedly connected to the end of the sliding plate 62 near the moving plate 11. The grinding rod 72 is slidably connected to the lower side of the balance plate 61. A telescopic rod 65 is also provided between the balance plate 61 and the sliding plate 62. The telescopic rod 65 is located at the end of the sliding plate 62 away from the grinding wheel 71, and both ends of the telescopic rod 65 are fixedly connected to the sliding plate 62 and the grinding rod 72, respectively, so that the grinding rod 72 moves with the sliding plate 62. The grinding wheel 71 includes a grinding wheel 711 and a third motor 712. The third motor 712 is fixedly connected to the sliding plate 62 to drive the grinding wheel 711 to rotate. The bottom of the grinding rod 72 is arc-shaped and wrapped with sandpaper for grinding the inner wall of the titanium alloy tube.

[0033] Working principle: The first step is to adjust the diameter of the abutment rod 2221 protruding outside the sliding hole 2211: The operator rotates the screw 223 to move the abutment rod 2221 and the moving rod 2222 so that the maximum diameter of the abutment rod 2221 protruding outside the sliding hole 2211 matches the inner diameter of the titanium alloy tube to be polished.

[0034] The second step is to place the titanium alloy tube: The operator starts the second motor 32, which drives the two rotating wheels 313 on the same end, as well as the corresponding connecting rods 312 and telescopic plates 311 to rotate in opposite directions, so that the pair of telescopic plates 311 are in contact. Then the operator turns off the second motor 32 and places the titanium alloy tube to be polished in the V-shaped placement area formed by the pair of telescopic plates 311.

[0035] The third step involves clamping the titanium alloy tube: The operator activates the adjusting screw assembly 13 to move the moving plate 11 towards the fixed plate 12. During this movement, the abutment part 212 gradually extends into one end of the titanium alloy tube until it abuts against that end. Then, the operator pushes the titanium alloy tube synchronously towards the fixed plate 12 until the abutment rod 2221 is fully extended into the other end of the titanium alloy tube, causing the other end of the tube to abut against the rotating rod 221. The adjusting screw assembly 13 is then closed. After clamping is complete, the operator activates the second motor 32 again. The second motor 32 rotates in the opposite direction, causing the telescopic plate 311 to move in the opposite direction, thus creating space for subsequent grinding of the titanium alloy tube.

[0036] The fourth step is to rotate the titanium alloy tube: The operator starts the first motor 42 to drive the gear 41 and the rotating ring 221 to rotate, thereby driving the titanium alloy tube to rotate.

[0037] The fifth step involves grinding and polishing the inner and outer surfaces of the titanium alloy tube: The operator activates the grinding screw assembly 64 to move the sliding plate 62, grinding wheel 711, telescopic rod 65, and grinding rod 72 toward the titanium alloy tube until the grinding rod 72 moves inside the tube. Then, the operator activates the hydraulic cylinder 631 connected to the balance plate 61 to move the balance plate 61 downwards until the grinding rod 71 contacts the inner wall of the titanium alloy tube. The operator then closes the hydraulic cylinder 631. Simultaneously, the operator activates the hydraulic cylinder 631 connected to the support plate 633 to move the support plate 633, sliding plate 62, grinding screw assembly 64, and grinding wheel 711 upwards until the grinding wheel 711 contacts the outer wall of the titanium alloy tube. The operator then closes the hydraulic cylinder 631. As the grinding screw assembly 64 continues to move, the inner and outer walls of the titanium alloy tube are ground and polished by the grinding wheel 711 and grinding rod 72 as the tube rotates. When the grinding wheel 711 moves to the other end of the titanium alloy tube that abuts against the rotating ring 221, the grinding screw assembly 64 drives the sliding plate 62, grinding wheel 711, telescopic rod 65, and grinding rod 72 to move in opposite directions, thereby reciprocating to grind the titanium alloy tube. Since the abutting rod 2221 does not rotate, the grinding rod 72 can move to the other end of the titanium alloy tube to grind the entire inner wall of the titanium alloy tube.

[0038] The sixth step is to collect the debris that falls off the titanium alloy tube during grinding: During the grinding process, the suction equipment is activated. The debris that falls off the outer wall of the titanium alloy tube falls onto the collection plate 51. The suction generated by the suction equipment is drawn into the collection chamber through the collection hole to keep the working environment clean.

[0039] Step 7 Automatic Removal of Titanium Alloy Tube: After grinding is completed, the grinding wheel 711 and grinding rod 72 are reset. The operator then starts the adjusting screw assembly 13 again to drive the moving plate 11 to move in the opposite direction, so that the abutment part 212 disengages from the end of the titanium alloy tube. Under the gravity of the titanium alloy tube, the other end of the titanium alloy tube disengages from the abutment rod 2221 and falls onto the collecting plate 51, and slides out of the base frame 1 along the tilt direction of the collecting plate 51.

[0040] Example 2:

[0041] Based on Embodiment 1, a fourth motor (not shown in the figure) is fixedly connected to the end of the screw 223 away from the sliding hole 2211. The diameter of the abutment rod 2221 protruding from the sliding hole 2211 is adjusted by rotating the screw 223 driven by the fourth motor. Alternatively, the screw 223 can be rotated by the fourth motor to move the abutment rod 2221 towards the sliding hole 2211, thereby disengaging the abutment rod 2221 from the titanium alloy tube and ensuring that the titanium alloy tube can fall off automatically.

Claims

1. An online grinding and polishing device for pipe surfaces, characterized in that: The components include a base frame (1), a clamping device (2), a load-bearing assembly (3), a power assembly (4), a cleaning assembly (5), a drive device (6), and a grinding assembly (7). A movable plate (11) is slidably connected to the base frame (1), and a fixed plate (12) is fixedly connected to it. The clamping device (2) includes a fixed part (21) fixedly connected to the movable plate (11) and a rotating part (22) movably connected to the fixed plate (12). An adjusting screw assembly (13) is provided on the side of the movable plate (11) to drive the movable plate (11) and the fixed part (21) to move, for clamping or releasing the pipe. The load-bearing assembly (3) is rotatably connected to the fixed plate (12). The moving plate (11) and the fixed plate (12) are placed between the moving plate (11) and the fixed plate (12) for placing the pipe to be clamped; the power assembly (4) is set on the fixed plate (12) and meshes with the rotating part (22) to drive the rotating part (22) to rotate; the cleaning assembly (5) is fixedly connected to the base frame (1) below the bearing assembly (3) for collecting the debris that falls off when polishing the pipe; the drive device (6) is set on the side of the moving plate (11), and the polishing assembly (7) is set on the drive device (6). The drive device (6) can move between the clamping devices (2) so that the polishing assembly (7) polishes the inner and outer surfaces of the pipe.

2. The online grinding and polishing device for pipe surfaces according to claim 1, characterized in that: The fixing part (21) includes a fixing ring (211) fixedly connected to the moving plate (11) and an abutting part (212) fixedly connected to the fixing ring (211); the abutting part (212) has a tapered cross section, and the surface of the abutting part (212) is used to abut against the end of the pipe; the moving plate (11) is also provided with a moving hole (111) corresponding to the driving device (6) and the grinding assembly (7), and the part of the driving device (6) and the grinding assembly (7) overlapping with the fixing ring (211) and the abutting part (212) is further penetrated by the moving hole (111).

3. The online grinding and polishing device for pipe surfaces according to claim 2, characterized in that: The rotating part (22) includes a rotating ring (221), a limiting rod (222) and a screw (223) on the rotating connecting fixing plate (12); the rotating ring (221) has a sliding hole (2211) with the maximum diameter of the matching abutment part (212) in the middle; the screw (223) passes through and is threaded to the fixing plate (12), and is rotatably connected to the limiting rod (222).

4. The online grinding and polishing device for pipe surfaces according to claim 3, characterized in that: The limiting rod (222) includes a V-shaped abutment rod (2221) and a moving rod (2222); the maximum width of the opening side of the abutment rod (2221) matches the diameter of the sliding hole (2211); one end of the moving rod (2222) is fixedly connected to the abutment rod (2221), and the other end is rotatably connected to the screw (223); the driving end of the power assembly (4) is engaged with the rotating ring (221).

5. The online grinding and polishing device for pipe surfaces according to claim 1, characterized in that: The load-bearing assembly (3) includes a pair of load-bearing plates (31) and a second motor (32). The two ends of each pair of load-bearing plates (31) are rotatably connected to the moving plate (11) and the fixed plate (12) respectively, and the load-bearing plates (31) at the same end are meshed with each other. The drive shaft of the second motor (32) is fixedly connected to the load-bearing plates (31), thereby driving the pair of load-bearing plates (31) to rotate in opposite or the same direction.

6. The online grinding and polishing device for pipe surfaces according to claim 5, characterized in that: Each load-bearing plate (31) includes a telescopic plate (311), a pair of connecting rods (312) disposed at both ends of the telescopic plate (311), and a pair of rotating wheels (313); the two ends of the connecting rods (312) are fixedly connected to the telescopic plate (311) and the rotating wheels (313) respectively, and the pair of rotating wheels (313) are rotatably connected to the moving plate (11) and the fixed plate (12) respectively, and the two adjacent rotating wheels (313) are meshed together; the second motor (32) is fixedly connected to any rotating wheel (313) on the moving plate (11).

7. The online grinding and polishing device for pipe surfaces according to claim 1, characterized in that: The cleaning component (5) includes a collection plate (51) with a collection cavity and a collection tube (52); the collection plate (51) is inclined, and a collection hole communicating with the collection cavity is opened on the upper side of the collection plate (51), and the collection tube (52) is fixedly connected to the lower side of the collection plate (51).

8. The online grinding and polishing device for pipe surfaces according to claim 1, characterized in that: The drive device (6) is provided with a pair of L-shaped sliding rods (14) on both sides; the drive device (6) includes a balance plate (61), a sliding plate (62), a pair of lifting components (63) located on both sides of the pair of sliding plates (62) and a grinding screw assembly (64); each pair of lifting components (63) is slidably connected to the sliding plate (62) located on the same side and fixedly connected to the balance plate (61); the two pairs of lifting components (63) are connected to the balance plate (61) and the sliding plate (62), and the lifting components (63) are fixedly connected to the sliding rods (14) on the same side; the grinding screw assembly (64) is located at the bottom of the sliding plate (62) to drive the sliding plate (62) to move.

9. The online grinding and polishing device for pipe surfaces according to claim 8, characterized in that: Each lifting assembly (63) includes multiple pairs of hydraulic cylinders (631), multiple fixed frames (632), and a pair of support plates (633) slidably connected to both sides of the sliding plate (62); each fixed frame (632) fixes a pair of hydraulic cylinders (631) and is fixedly connected to the sliding rod (14); each pair of hydraulic cylinders (631) is arranged in opposite directions, so that the driving end of each pair of hydraulic cylinders (631) is fixedly connected to the balance plate (61) and the support plate (633) respectively, thereby controlling the lifting of the balance plate (61) and the sliding plate (62) separately.

10. The online grinding and polishing device for pipe surfaces according to claim 9, characterized in that: The grinding assembly (7) includes a grinding wheel (71) and a grinding rod (72); the grinding wheel (71) is fixedly connected to the end of the sliding plate (62) near the moving plate (11); the grinding rod (72) is slidably connected to the lower side of the balance plate (61); a telescopic rod (65) is also provided between the ends of the balance plate (61) and the sliding plate (62) away from the grinding wheel (71); the two ends of the telescopic rod (65) are fixedly connected to the sliding plate (62) and the grinding rod (72) respectively.

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