Method and apparatus for on-line polishing of the inner wall of a long tube

Abstract

This invention discloses an online polishing method and apparatus for the inner wall of long pipes. In a first aspect, it provides an online polishing method for the inner wall of long pipes, comprising the following steps: feeding the first pipe fitting on the inlet side; moving the polishing head inside the pipe fitting and rotating the fitting; resetting the polishing head; sequentially polishing the inner wall of the pipe fitting; and unloading. In a second aspect, it provides an online polishing apparatus for the inner wall of long pipes, comprising a frame, a material transfer mechanism, a material transfer mechanism, a material stabilizing mechanism, a polishing component, and a polishing drive mechanism. The advantages of this invention are: the material transfer guide component transmits the pipe fittings one by one to the outlet side; the pipe fittings rotate continuously during polishing, enabling multiple online polishing processes and automatic material transfer and unloading, improving production line efficiency and polishing effect; a protective tube is fitted onto the polishing rod and extends into the pipe fitting, enhancing the connection strength of the polishing rod; with the cooperation of the material stabilizing mechanism, it avoids the problem of long-shaft polishing rods drooping and affecting polishing, thus meeting the requirements for inner wall polishing of long-shaft pipe fittings.

Description

Technical Field

[0001] This invention relates to the field of stainless steel pipe processing technology, and in particular to an online polishing method and apparatus for the inner wall of long pipes. Background Technology

[0002] Stainless steel pipes are widely used in industrial production and daily life. In order to create a smooth, clean, and highly corrosion-resistant surface on the inner wall of the steel pipe, thereby ensuring the purity, safety, and efficiency of the fluid transported through the pipeline, and meeting strict industry standards and special application requirements, the inner wall of the steel pipe needs to be polished.

[0003] Generally, the polishing head needs to be inserted into the pipe for polishing. However, for long steel pipes, such as pipes with a shaft length greater than 1 meter, it is difficult for the polishing head to enter the pipe stably and effectively and thoroughly polish the inner wall.

[0004] Therefore, it is necessary to study polishing methods for the inner walls of long-shaft tubes to meet the requirements of mass production. Summary of the Invention

[0005] To achieve the above-mentioned objectives, this invention provides an online polishing method for the inner wall of a long tube, and based on this method, an online polishing device for the inner wall of a long tube is designed to achieve online polishing of the inner wall of long shaft-type tubes.

[0006] In a first aspect, the present invention provides an online polishing method for the inner wall of a long tube, comprising the following steps:

[0007] Step 1: Load the first pipe fitting at the first polishing station on the feeding side and position the pipe fitting;

[0008] Step 2: Insert the polishing head into the end of the pipe fitting and move the polishing head along the inner wall of the pipe fitting while rotating the pipe fitting;

[0009] Step 3: After polishing the first pipe fitting, remove the polishing head from the pipe fitting and reset it;

[0010] Step 4: Set up several polishing stations, move the first pipe to the second polishing station, and at the same time continue to feed the pipes one by one at the first polishing station on the feeding side. During the process of conveying the pipes to the discharge end one by one, polish the inner wall of the pipes one by one.

[0011] Step 5: Each pipe is polished sequentially at each polishing station and then discharged sequentially from the discharge end.

[0012] Based on the above-mentioned online polishing method for the inner wall of a long tube, a second aspect of the present invention provides an online polishing device for the inner wall of a long tube, which operates the above-mentioned online polishing method for the inner wall of a long tube, including a frame, a material transfer mechanism, a material transfer mechanism, a material stabilizing mechanism, a polishing component, and a polishing drive mechanism.

[0013] The material transfer mechanism is used to position the pipe in step 1, to continue feeding the pipe one by one at the first polishing station on the feeding side in step 4, and to unload the pipe from the discharge end in step 5.

[0014] The material transfer mechanism is used to rotate the pipe fitting in step 1;

[0015] The material stabilizing mechanism and the polishing driving mechanism are used for moving the polishing head in steps 2-3;

[0016] The polishing assembly is used to polish the inner wall of the pipe in steps 3-4;

[0017] The frame includes a material conveying frame and a polishing frame, and the polishing frame is provided with a track;

[0018] The material conveyor frame is provided with one or more material conveying mechanisms, each material conveying mechanism including a conveying roller group and a material conveying guide assembly, the material conveying guide assembly being located on one side of the conveying roller group;

[0019] The transfer roller group includes several transfer rollers, which are arranged side by side on the material transfer frame, and two adjacent transfer rollers form a single polishing positioning group;

[0020] The material conveying and guiding assembly includes a guide plate, a material conveying connecting frame, and a top material cylinder. The top material cylinder is connected to the guide plate through the material conveying connecting frame. The guide plate is provided with several guide slopes that can convey the pipes one by one to the discharge end of the conveying roller group.

[0021] The guide plate has a feeding section and a discharge ramp at its two ends. The feeding section is located on the feeding side of the conveyor roller assembly, and the discharge ramp is located on the discharge side of the conveyor roller assembly. A material collection frame is provided on the side of the material conveyor frame. The material collection frame has a downward inclined material collection guide ramp. A baffle plate is provided at the lowest end of the material collection guide ramp. The discharge ramp faces the material collection guide ramp.

[0022] The material transfer mechanism includes a rotating connecting frame, several pressing cylinders, and several pressing rollers. The pressing cylinders are connected to the pressing rollers through the connecting frame. The pressing cylinders and the pressing rollers form a pressing group. Several pressing groups are arranged in parallel on the connecting frame. The number of pressing groups is adapted to the number of polishing positioning groups.

[0023] The material transfer mechanism is located above one of the conveyor roller groups, and the material transfer frame is equipped with a material transfer drive assembly, which is connected to one of the conveyor roller groups;

[0024] The polishing drive mechanism is located at the end of the polishing frame. The polishing drive mechanism includes a polishing drive assembly and a wheel polishing frame. The wheel polishing frame is connected to the track, and the polishing drive assembly is located on the wheel polishing frame.

[0025] The polishing assembly includes several protective tubes and several polishing rods. The protective tubes are connected to the wheel polishing frame. The polishing rods are coaxially arranged inside the protective tubes. One end of the polishing rod is connected to the polishing drive assembly. The other end of the polishing rod is provided with a polishing head, which extends out of the protective tube.

[0026] The material stabilizing mechanism includes two connecting rods and a pulley material stabilizing frame. The pulley material stabilizing frame is connected to the track. The two connecting rods are respectively arranged vertically on the pulley material stabilizing frame. Several limiting rollers are provided on the connecting rods. The protective tube is located between the corresponding upper and lower limiting rollers.

[0027] As a further improvement of the present invention, the guide slope is inclined upward, the number of guide slopes is adapted to the number of transmission rollers, the highest position of the guide slope is the top material end, and the top material end is biased toward the feed side of the vertical surface of the corresponding single polishing positioning group.

[0028] As a further improvement of the present invention, the material transfer guiding assembly further includes a first guiding assembly, and the guide plate is connected to the material transfer connecting frame through the first guiding assembly.

[0029] As a further improvement of the present invention, a second guide assembly is connected between the pressure roller and the rotating connecting frame.

[0030] As a further improvement of the present invention, both ends of the tube are provided with material transfer mechanisms, and the material transfer mechanism is close to the polishing insertion end of the tube.

[0031] As a further improvement of the present invention, the polishing head is provided with a connecting ring, which is detachably connected to the polishing rod by a first fastener.

[0032] As a further improvement of the present invention, a limiting block is provided at the end of the track.

[0033] Furthermore, the limiting block is provided with a positioning groove, which faces the wheel polishing frame.

[0034] As a further improvement of the present invention, the pulley stabilizer is provided with an adjustment groove in the vertical direction, and the second fastener passes through the adjustment groove to detachably connect the connecting rod to the pulley stabilizer.

[0035] The key point of this invention is that the pipe is placed on the polishing positioning group on the feeding side of the conveying roller group, and the pressure roller of the transfer mechanism presses down on the end of the pipe to facilitate the connection between the polishing head and the end of the pipe. Then, the roller polishing frame is pushed to continuously extend the polishing component into the corresponding pipe. The pipe rotates continuously on the conveying roller group under the action of the transfer driving component below, and the polishing head rotates under the action of the polishing driving component to achieve polishing treatment of the inner wall of the pipe. After polishing, the polishing component is pushed back to its original position, that is, the polishing head leaves the pipe, the pressure roller rises and resets, and the material transfer guide component transfers the corresponding pipe to the next polishing positioning group. Meanwhile, the pipe in the polishing positioning group on the discharge side has completed the last polishing and is transferred to the collection rack by the material transfer guide component for processing and collection.

[0036] The advantages of this invention compared to the prior art are as follows:

[0037] (1) The pipes are conveyed one by one to the discharge side by the material conveying guide assembly, and the pipes continue to rotate during polishing, so as to realize online multiple polishing treatment and automatic material conveying and unloading of the pipes, thereby improving production line efficiency and polishing effect.

[0038] (2) Polishing is carried out by using a protective tube sleeve on the polishing rod and extending into the pipe fitting. The protective tube can enhance the connection strength of the polishing rod. With the cooperation of the material stabilizing mechanism, the problem of the long shaft polishing rod drooping and affecting the polishing is avoided, which meets the polishing requirements of the inner wall of long shaft pipe fittings. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of an online polishing method and apparatus for the inner wall of a long tube according to the present invention;

[0040] Figure 2 This is a schematic diagram of the material transfer structure of the pipe fittings of the present invention;

[0041] Figure 3 This is a schematic diagram of the material transfer and guiding assembly of the present invention;

[0042] Figure 4 This is a schematic diagram of the material transfer mechanism of the present invention;

[0043] Figure 5 This is a schematic diagram of the material feeding state of the pipe fittings according to the present invention;

[0044] Figure 6 This is a schematic diagram of the guide slope rising in the present invention;

[0045] Figure 7 This is a schematic diagram of the pipe fitting transfer state structure of the present invention;

[0046] Figure 8 This is a schematic diagram of the guide ramp descending state structure of the present invention;

[0047] Figure 9 This is a schematic diagram of the pipe polishing structure of the present invention;

[0048] Figure 10 This is a schematic diagram of the polishing assembly of the present invention;

[0049] Figure 11 This is a schematic diagram of the material stabilizing mechanism of the present invention. Detailed Implementation

[0050] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0051] In a first aspect, the present invention provides an online polishing method for the inner wall of a long tube, comprising the following steps:

[0052] Step 1: Load the first pipe fitting at the first polishing station on the feeding side and position the pipe fitting;

[0053] Step 2: Insert the polishing head into the end of the pipe fitting and move the polishing head along the inner wall of the pipe fitting while rotating the pipe fitting;

[0054] Step 3: After polishing the first pipe fitting, remove the polishing head from the pipe fitting and reset it;

[0055] Step 4: Set up several polishing stations, move the first pipe to the second polishing station, and at the same time continue to feed the pipes one by one at the first polishing station on the feeding side. During the process of conveying the pipes to the discharge end one by one, polish the inner wall of the pipes one by one.

[0056] Step 5: Each pipe is polished sequentially at each polishing station and then discharged sequentially from the discharge end.

[0057] like Figure 1 As shown, based on the above-mentioned online polishing method for the inner wall of a long tube, a second aspect of the present invention provides an online polishing device for the inner wall of a long tube, which operates the above-mentioned online polishing method for the inner wall of a long tube, including a frame 1, a material transfer mechanism 2, a material transfer mechanism 5, a material stabilizing mechanism 6, a polishing assembly 7, and a polishing drive mechanism 8.

[0058] Material transfer mechanism 2 is used for positioning the pipe in step 1, continuing to feed the pipe one by one at the first polishing station on the feeding side in step 4, and unloading the pipe from the discharge end in step 5.

[0059] Transfer mechanism 5 is used for rotating the pipe fitting in step 1;

[0060] The material stabilizing mechanism 6 and the polishing drive mechanism 8 are used for moving the polishing head in steps 2-3;

[0061] Polishing component 7 is used to polish the inner wall of the pipe in steps 3-4.

[0062] The present invention further provides a detailed description of each piece of equipment involved in an online polishing device for the inner wall of a long tube.

[0063] Rack 1

[0064] The frame 1 includes a material transfer frame 12 and a polishing frame 13, and the polishing frame 13 is provided with a track 131.

[0065] Material transfer mechanism 2

[0066] like Figure 2-4 As shown, the material conveying frame 12 is provided with one or more material conveying mechanisms 2. The material conveying mechanism 2 includes a conveying roller group 3 and a material conveying guide assembly 4. The material conveying guide assembly 4 is located on one side of the conveying roller group 3.

[0067] The transfer roller group 3 includes several transfer rollers 31, which are arranged side by side on the material transfer frame 12. The pipe 9 is positioned between two adjacent transfer rollers 31, and the two adjacent transfer rollers 31 are a single polishing positioning group.

[0068] The material conveying and guiding assembly 4 includes a guide plate 41, a material conveying connecting frame 42, and a top material cylinder 47. The top material cylinder 47 is connected to the guide plate 41 through the material conveying connecting frame 42. The guide plate 41 is provided with a plurality of guide slopes 42 that can convey the pipes 9 one by one to the discharge end of the conveying roller group.

[0069] The guide slope 42 is inclined upward, and the number of guide slopes 42 is matched with the number of transmission rollers 31. The highest position of the guide slope 42 is the top material end, which is biased towards the feed side of the vertical surface of the corresponding single polishing positioning group.

[0070] The two ends of the guide plate 41 are the feeding part 44 and the discharge slope 43, respectively. The feeding part 44 is located on the feeding side of the transmission roller group 3, and the discharge slope 43 is located on the discharge side of the transmission roller group 3. The side of the material conveyor frame 12 is provided with a material collection frame 11. The material collection frame 11 is provided with a downward inclined material collection guide slope 111. The lowest end of the material collection guide slope 111 is provided with a baffle plate 112, and the discharge slope 43 faces the material collection guide slope 111.

[0071] like Figure 5 As shown, the guide plate 41 is initially positioned below the pipe fitting 9, as... Figure 6 As shown, the top-loading cylinder 47 lifts the guide plate 41, lifting the pipe fittings 9 in each polishing station. The pipe fittings 9 leave each transfer roller 31 and move along the corresponding guide slope 42 towards the next polishing station, as shown. Figure 7-8As shown, after the pipe 9 slides to the lowest end of the corresponding guide slope 42, the top material cylinder 47 controls the guide plate 41 to descend and reset. The pipe 9 disengages from the guide plate 41 and slides along the roller surface of the corresponding transmission roller 31 to the next polishing positioning group to continue the next polishing. The pipe 9 that has been polished (located on the discharge side of the transmission roller group 3) slides along the discharge slope 43 and falls into the collection guide slope 111 below. The pipe 9 slides along the collection guide slope 111 to the baffle plate 112 to complete the discharge and collection.

[0072] The material transfer guiding assembly 4 also includes a first guiding assembly 46, through which the guide plate 41 is connected to the material transfer connecting frame 42. The first guiding assembly 46 can be a guide rod and a linear bearing assembly. The first guiding assembly 46 guides the lifting and lowering of the guide plate 41, preventing the guide plate 41 from deviating and affecting the material transfer position.

[0073] Material transfer mechanism 5

[0074] The material transfer mechanism 5 includes a rotating connecting frame 53, several pressing cylinders 52, and several pressing rollers 51. The pressing cylinders 52 are connected to the pressing rollers 51 through the connecting frame 53. The pressing cylinders 52 and the pressing rollers 51 form a pressing group. Several pressing groups are arranged in parallel on the connecting frame 53. The number of pressing groups is adapted to the number of polishing positioning groups.

[0075] The material transfer mechanism 5 is located above one of the conveyor roller groups 3. The material transfer frame 12 is equipped with a material transfer drive assembly 121, which is connected to one of the conveyor roller groups 3. The material transfer drive assembly 121 can use an existing chain drive assembly, with a motor providing power to rotate the connected conveyor roller group 3, thereby causing the pipe to rotate.

[0076] During polishing, the pressure cylinder 52 controls the pressure roller 51 to press down, positioning the tube 9 between the pressure roller 51 and the transfer roller 31. The corresponding transfer roller 31 drives the tube 9 to rotate under the action of the material transfer drive assembly 12, thereby improving the polishing effect.

[0077] A second guide assembly 54 is connected between the pressure roller 51 and the rotating connecting frame 53. The second guide assembly 54 can be a guide rod and a linear bearing assembly. The second guide assembly 54 guides the lifting and lowering of the pressure roller 51 and prevents the pressure roller 51 from being misaligned.

[0078] Longer pipe fittings 9 may have their ends warped, affecting polishing. Both ends of the pipe fitting 9 are equipped with material transfer mechanisms 2 and material transfer mechanisms 5 are close to the polishing insertion end of the pipe fitting 9. While enabling the pipe fitting 9 to rotate continuously, the pipe opening of the pipe fitting 9 is positioned to prevent the polishing insertion end of the pipe fitting 9 from warping, making it easier for the polishing component 7 to be accurately inserted into the pipe fitting 9.

[0079] Both the transfer roller 31 and the pressure roller 51 are nylon rollers, which reduces wear on the outer wall of the pipe 9.

[0080] Polishing component 7 and polishing drive mechanism 8

[0081] like Figure 9-11 As shown, the polishing drive mechanism 8 is located at the end of the polishing frame 13. The polishing drive mechanism 8 includes a polishing drive assembly 81 and a wheel polishing frame 82. The wheel polishing frame 82 is connected to the track 131, and the polishing drive assembly 81 is located on the wheel polishing frame 82.

[0082] The polishing assembly 7 includes several protective tubes 71 and several polishing rods 72. The protective tubes 71 are connected to the wheel polishing frame 82. The polishing rods 72 are coaxially arranged inside the protective tubes 71. One end of the polishing rod 72 is connected to the polishing drive assembly 81. The other end of the polishing rod 72 is provided with a polishing head 73, which extends out of the protective tubes 71.

[0083] The polishing drive assembly 81 can be a motor and a belt drive assembly. The motor drives the drive wheel on its shaft, and through the friction between the belt and the driven wheel, mechanical energy is transmitted and torque is transformed, so that the polishing rod 72 connected to it rotates.

[0084] The protective tube 71 serves to protect the polishing rod 72 and strengthen its structural strength. The wheeled polishing frame 82 pushes the protective tube 71 and polishing rod 72 into the pipe fitting 9, thereby treating the inner wall of the pipe fitting 9. Since the pipe fitting 9 is relatively long, the length of the polishing rod 72 is adapted to the pipe fitting 9. The polishing head 73 is equipped with a connecting ring 75, which is detachably connected to the polishing rod 72 via a first fastener 74, facilitating the replacement of the polishing head 73.

[0085] After the pipe fitting 9 completes a single polishing cycle, the roller polishing frame 82 needs to be pulled back to its original position. The roller polishing frame 82 always moves back and forth along the track 131. The end of the track 131 is equipped with a limit block 14 to prevent the roller polishing frame 82 from derailing and to position it. This prevents the polishing head 73 from remaining stuck in the pipe fitting 9 if the operator fails to pull it back into position, while the pipe fitting 9 continues to feed material, thus affecting safety. The limit block 14 is equipped with a positioning groove 15 facing the roller polishing frame 82. When the roller polishing frame 82 is reset, the side of the roller polishing frame 82 engages with the positioning groove 15, locking the frame and improving the positioning effect of the limit block 14 during frame reset.

[0086] The polishing frame 82 with wheels is equipped with a handrail 821 for easy pushing and pulling of the frame.

[0087] Material stabilizing mechanism 6

[0088] The material stabilizing mechanism 6 includes two connecting rods 61 and a pulley material stabilizing frame 63. The pulley material stabilizing frame 63 is connected to the track 131. The two connecting rods 61 are respectively set on the pulley material stabilizing frame 63, and several limiting rollers 62 are provided on the connecting rods 61. The protective tube 71 is located between the corresponding upper and lower limiting rollers 62.

[0089] Because the protective tube 71 is designed to accommodate the polishing of long pipe fittings, its length is relatively long, making it prone to sagging. This can affect the polishing of the polishing head 73 within the pipe fitting 9. The limiting roller 62 can limit the movement of the protective tube 71, ensuring that it remains coaxial with the pipe fitting 9 during polishing. Additionally, the pulley-driven material stabilizer 63 can be adjusted back and forth along the track 131, improving the flexibility of the limiting mechanism.

[0090] The pulley stabilizer 63 is vertically provided with an adjustment groove 64. The second fastener 65 passes through the adjustment groove 64 to detachably connect the connecting rod 61 to the pulley stabilizer 63. The distance between the upper and lower connecting rods 61 can be adjusted by the second fastener 65 to facilitate machine adjustment.

[0091] The present invention discloses an online polishing device for the inner wall of a long pipe. The pipe 9 is placed on the polishing positioning group on the feeding side of the conveying roller group 3. The pressure roller 51 of the transfer mechanism 5 presses down on the port of the pipe 9 to facilitate the connection between the polishing head and the port of the pipe 9. Subsequently, the roller polishing frame 82 is pushed to continuously extend the polishing component 7 into the corresponding pipe 9. The pipe 9 rotates continuously on the conveying roller group 3 under the action of the transfer driving component 121 below, and the polishing head 73 rotates under the action of the polishing driving component 81 to achieve polishing treatment of the inner wall of the pipe 9. After polishing, the polishing component 7 is pushed back to its original position, that is, the polishing head 73 leaves the pipe 9, the pressure roller 51 rises and resets, and the material transfer guide component 4 transfers the corresponding pipe 9 to the next polishing positioning group. The pipe 9 in the polishing positioning group on the discharge side has completed the last polishing and is transferred to the collection rack 11 by the material transfer guide component 4 for processing and collection.

[0092] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A long tube inner wall on-line polishing device, characterized in that, An online polishing method for the inner wall of a long tube is provided, which includes the following steps: Step 1: Load the first pipe fitting at the first polishing station on the feeding side and position the pipe fitting; Step 2: Insert the polishing head into the end of the pipe fitting and move the polishing head along the inner wall of the pipe fitting while rotating the pipe fitting; Step 3: After polishing the first pipe fitting, remove the polishing head from the pipe fitting and reset it; Step 4: Set up several polishing stations, move the first pipe to the second polishing station, and at the same time continue to feed the pipes one by one at the first polishing station on the feeding side. During the process of conveying the pipes to the discharge end one by one, polish the inner wall of the pipes one by one. Step 5: Each pipe is polished sequentially at each polishing station and then discharged sequentially from the discharge end; An online polishing device for the inner wall of a long tube includes a frame, a material transfer mechanism, a material switching mechanism, a material stabilizing mechanism, a polishing assembly, and a polishing drive mechanism; The material transfer mechanism is used for positioning the pipe in step 1, continuing to feed the pipe one by one at the first polishing station on the feeding side in step 4, and unloading the pipe from the discharge end in step 5. The material transfer mechanism is used to rotate the pipe fitting in step 1; The material stabilizing mechanism and the polishing driving mechanism are used for moving the polishing head in steps 2-3; The polishing assembly is used to polish the inner wall of the pipe in steps 3-4; The frame includes a material conveying frame and a polishing frame, and the polishing frame is provided with a track; The material conveyor frame is provided with one or more material conveying mechanisms, each material conveying mechanism including a conveying roller group and a material conveying guide assembly, the material conveying guide assembly being located on one side of the conveying roller group; The transfer roller group includes several transfer rollers, which are arranged side by side on the material transfer frame, and two adjacent transfer rollers form a single polishing positioning group; The material conveying and guiding assembly includes a guide plate, a material conveying connecting frame, and a top material cylinder. The top material cylinder is connected to the guide plate through the material conveying connecting frame. The guide plate is provided with several guide slopes that can convey the pipes one by one to the discharge end of the conveying roller group. The guide plate has a feeding section and a discharge ramp at its two ends. The feeding section is located on the feeding side of the conveyor roller assembly, and the discharge ramp is located on the discharge side of the conveyor roller assembly. A material collection frame is provided on the side of the material conveyor frame. The material collection frame has a downward inclined material collection guide ramp. A baffle plate is provided at the lowest end of the material collection guide ramp. The discharge ramp faces the material collection guide ramp. The material transfer mechanism includes a rotating connecting frame, several pressing cylinders and several pressing rollers. The pressing cylinders are connected to the pressing rollers through the connecting frame. The pressing cylinders and the pressing rollers form a pressing group. Several pressing groups are arranged in parallel on the connecting frame. The number of pressing groups is adapted to the number of polishing positioning groups. The material transfer mechanism is located above one of the conveyor roller groups, and the material transfer frame is equipped with a material transfer drive assembly, which is connected to one of the conveyor roller groups; The polishing drive mechanism is located at the end of the polishing frame. The polishing drive mechanism includes a polishing drive assembly and a wheel polishing frame. The wheel polishing frame is connected to the track, and the polishing drive assembly is located on the wheel polishing frame. The polishing assembly includes several protective tubes and several polishing rods. The protective tubes are connected to the wheel polishing frame. The polishing rods are coaxially arranged inside the protective tubes. One end of the polishing rod is connected to the polishing drive assembly. The other end of the polishing rod is provided with a polishing head, which extends out of the protective tube. The material stabilizing mechanism includes two connecting rods and a pulley material stabilizing frame. The pulley material stabilizing frame is connected to the track. The two connecting rods are respectively arranged vertically on the pulley material stabilizing frame. Several limiting rollers are provided on the connecting rods. The protective tube is located between the corresponding upper and lower limiting rollers.

2. The online polishing device for the inner wall of a long tube as described in claim 1, characterized in that, The guide slope is inclined upward, and the number of guide slopes is matched with the number of transmission rollers. The highest position of the guide slope is the top material end, which is biased towards the feed side of the vertical surface of the corresponding single polishing positioning group.

3. The online polishing device for the inner wall of a long tube as described in claim 1, characterized in that, The material transfer guiding assembly further includes a first guiding assembly, and the guide plate is connected to the material transfer connecting frame through the first guiding assembly.

4. The online polishing device for the inner wall of a long tube as described in claim 1, characterized in that, A second guide assembly is connected between the pressure roller and the rotating connecting frame.

5. The online polishing device for the inner wall of a long tube as described in claim 1, characterized in that, Both ends of the pipe fitting are provided with material transfer mechanisms, and the material transfer mechanism is located near the polishing insertion end of the pipe fitting.

6. The online polishing device for the inner wall of a long tube as described in claim 1, characterized in that, The polishing head is provided with a connecting ring, which is detachably connected to the polishing rod by a first fastener.

7. The online polishing device for the inner wall of a long tube as described in claim 1, characterized in that, The end of the track is provided with a limiting block.

8. The online polishing device for the inner wall of a long tube as described in claim 7, characterized in that, The limiting block is provided with a positioning groove, which faces the wheel polishing frame.

9. The online polishing device for the inner wall of a long tube as described in claim 1, characterized in that, The pulley stabilizer is vertically provided with an adjustment groove, and a second fastener passes through the adjustment groove to detachably connect the connecting rod to the pulley stabilizer.

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