A seamless steel pipe internal processing device

Abstract

The present invention provides an internal processing device for seamless steel pipes, belonging to the field of mechanical technology. An internal processing device for seamless steel pipes includes: a plurality of positioning shafts, a rust removal chain group, a placement plate capable of horizontal movement, a pushing assembly, and a bearing driving device for bearing the seamless steel pipe and driving the seamless steel pipe to rotate; a plurality of parallel accommodation chutes are provided on the placement plate, and the positioning shafts are used to be placed in the accommodation chutes in one-to-one correspondence, and the positioning shafts can slide along the length direction of the accommodation chutes; a plurality of positioning shafts can be detachably inserted and form a rod body; the rust removal chain group includes two rust removal chain belts arranged on both sides of the positioning shaft, one ends of the two rust removal chain belts are connected through a positioning ring, the positioning ring can be sleeved on the end of one of the positioning shafts, and the rust removal chain belt can be detachably connected to the outer surface of the positioning shaft; the rust removal chain group is used to abut and contact the inner surface of the seamless steel pipe; the pushing assembly is used to push the positioning shafts in the accommodation chutes towards the seamless steel pipe direction.

Description

Technical Field

[0001] The present invention belongs to the technical field of machinery, and particularly relates to an internal processing device for seamless steel pipes. Background Art

[0002] Seamless steel pipes, also known as seamless tubes, are a common type of steel pipe. They are seamless circular cross-section tubes made by processing a steel billet through a series of processes such as drawing, piercing, and rolling. Compared with welded steel pipes, seamless steel pipes have no welds on their inner and outer surfaces, so they have better mechanical properties and sealing performance.

[0003] During production and storage, seamless steel pipes are prone to rust. For shorter steel pipes with smaller internal channels, pickling can be used for rust removal, but for larger internal channels, mechanical rust removal is generally used, which is more environmentally friendly. However, when the length of the seamless steel pipe is very long, such as more than 8m, the traditional mechanical rust removal method becomes inconvenient.

[0004] The traditional mechanical rust removal method usually uses a rotating shaft with a wire brush, which results in an overly long rotating shaft. Coupled with the length of the seamless steel pipe itself, the overall length of the equipment needs to reach more than 16m, occupying a large area. Moreover, if the length of the seamless steel pipe exceeds the length of the rotating shaft, it is necessary to clear one end of the seamless steel pipe and then turn the steel pipe around to clean the other end, which is very troublesome. Summary of the Invention

[0005] The purpose of the present invention is to address the above problems in the existing technology and propose an internal processing device for seamless steel pipes, which has the characteristic of forming a cleaning component with a corresponding length according to the length of the seamless steel pipe.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] An internal processing device for seamless steel pipes includes: a plurality of positioning shafts, a rust removal chain group, a placement plate capable of horizontal movement, a pushing component, and a carrying and driving device for carrying the seamless steel pipe and driving it to rotate; a plurality of parallel accommodation chutes are provided on the placement plate, the positioning shafts are placed in the accommodation chutes in a one-to-one correspondence, and the positioning shafts can slide along the length direction of the accommodation chutes; a plurality of positioning shafts can be detachably inserted and formed into a rod body; the rust removal chain group includes two rust removal chain belts arranged on both sides of the positioning shaft, one end of the two rust removal chain belts is connected by a positioning ring, the positioning ring can be sleeved on the end of one of the positioning shafts, and the rust removal chain belt can be detachably connected to the outer surface of the positioning shaft; the rust removal chain group is used to abut against the inner surface of the seamless steel pipe; the pushing component is used to push the positioning shaft in the accommodation chute towards the seamless steel pipe.

[0008] In the above seamless steel pipe internal processing equipment, two symmetric limiting parts along the length direction of the accommodation chute are provided on the accommodation chute, and two guiding parts corresponding to the limiting parts are provided on the positioning shaft. The guiding parts are in sliding fit with the limiting parts to limit the rotation of the positioning shaft.

[0009] In the above seamless steel pipe internal processing equipment, it further includes a fixing part, a polymerization part, and two winding wheels. The two winding wheels are respectively arranged on both sides of the fixing part, and one ends of the two rust removal chain belts far from the positioning rings are respectively connected to the two winding wheels; the fixing part is arranged at the other end of the placing plate relative to the pushing assembly. The fixing part has a through hole adapted to the shape of the positioning shaft and a limiting guide groove is opened on the inner part of the through hole. The guiding part can be in sliding fit with the limiting guide groove to limit the rotation of the positioning shaft relative to the fixing part; the polymerization part is arranged on the side of the fixing part far from the placing plate. The polymerization part is in a horn shape and gradually shrinks from the side close to the placing plate to the side far from the placing plate. The polymerization part has two symmetric guiding arc parts, and the guiding arc parts are used to guide the rust removal chain belt to fit on the positioning shaft.

[0010] In the above seamless steel pipe internal processing equipment, the positioning shaft includes a main body part and a plug-in part. The main body part has a jack adapted to the plug-in part and a sliding hole communicated with the jack. A slider is slidably arranged in the sliding hole. A groove is provided on the slider, and a hook-shaped part is provided at the end of the plug-in part. The hook-shaped part is adapted to the groove; a plurality of limiting grooves are circumferentially opened on the inner wall of the jack, and a plurality of limiting convex strips are provided on the outer peripheral wall of the plug-in part. The limiting convex strips are adapted to the limiting grooves; in the state where two positioning shafts are plugged, the hook-shaped part is hooked in the groove, and the limiting convex strips are in snap fit with the limiting grooves to limit the separation and rotation between the two positioning shafts.

[0011] In the above seamless steel pipe internal processing equipment, the slider can automatically reset by gravity after being displaced by force.

[0012] In the above seamless steel pipe internal processing equipment, the slider has a guiding surface for the end of the plug-in part to abut against to drive the slider to move.

[0013] In the above seamless steel pipe internal processing equipment, the rust removal chain belt includes a plurality of positioning plates sequentially hinged. A plurality of steel wires are fixed on the positioning plates. Each positioning plate has a first positioning block and a second positioning block; the main body part has symmetrically arranged first positioning holes and second positioning holes. The second positioning hole is communicated with the jack. The plug-in part has a third positioning hole; in the state where two positioning shafts are plugged, the first positioning block can be inserted into the first positioning hole, and the second positioning hole can be inserted into the second positioning hole and the second positioning hole.

[0014] In the above-mentioned seamless steel pipe internal processing equipment, the carrying drive device includes a plurality of rotating rollers, a first driving motor, a guide rail, and a movable frame. The movable frame is slidably arranged on the guide rail, and a plurality of rotating rollers are distributed on the movable frame and symmetrically arranged. The first driving motor is transmission-connected to the rotating roller on one side and drives the rotating roller to rotate.

[0015] In the above-mentioned seamless steel pipe internal processing equipment, the pushing assembly includes a push rod motor and a push block, and the push rod of the push rod motor is fixed with a push block.

[0016] In the above-mentioned seamless steel pipe internal processing equipment, the placement plate is connected to a driving assembly, and the driving assembly is used to drive the placement plate to move horizontally, and the driving assembly is a screw nut structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereoscopic diagram of the output positioning shaft portion of the present invention;

[0018] Figure 2 It is a stereogram of the positioning shaft in the present invention;

[0019] Figure 3 It is a cross-sectional view of the positioning shaft in the present invention;

[0020] Figure 4 This is a schematic diagram of the positioning shaft in the present invention when installing the rust removal chain belt;

[0021] Figure 5 It is a schematic diagram of the positioning shaft in the present invention having the rust removal chain belt installed;

[0022] Figure 6 yes Figure 5 A cross-sectional schematic diagram of the AA position;

[0023] Figure 7 yes Figure 5 A cross-sectional schematic diagram of the middle BB position;

[0024] Figure 8 yes Figure 1 A partial enlarged schematic diagram;

[0025] Figure 9 It is a schematic diagram of the seamless steel pipe in the processing state in the present invention.

[0026] In the figure,

[0027] 100. Seamless steel pipe;

[0028] 2. Positioning shaft; 21. Guiding part; 22. Main body part; 221. Insertion hole; 2211. Limiting groove; 222. Sliding hole; 223. First positioning hole; 224. Second positioning hole; 23. Insertion part; 231. Hook-shaped part; 232. Limiting rib; 233. Third positioning hole;

[0029] 3. Rust-removing chain belt; 31. Positioning plate; 311. First positioning block; 312. Second positioning block; 32. Steel wire; 33. Positioning ring;

[0030] 4. Placing plate; 41. Accommodating sliding groove; 411. Limiting part;

[0031] 5. Pushing component; 51. Push rod motor; 52. Top block;

[0032] 6. Carrying driving device; 61. Rotating roller; 62. Guide rail; 63. Moving frame; 64. First driving motor;

[0033] 9. Fixing part; 91. Through hole; 911. Limiting guide groove;

[0034] 10. Aggregation component; 101. Guiding arc part;

[0035] 11. Winding wheel;

[0036] 12. Slide block; 121. Groove; 122. Guiding surface;

[0037] 13. Driving component. Detailed implementation manner

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] Such as Figures 1 to 9As shown in the figure, a device for treating the interior of a seamless steel pipe 100 includes: a plurality of positioning shafts 2, a rust removal chain group, a placement plate 4 capable of horizontal movement, a pushing assembly 5, and a bearing driving device 6 for bearing the seamless steel pipe 100 and driving the seamless steel pipe 100 to rotate; a plurality of parallel accommodation chutes 41 are provided on the placement plate 4, and the positioning shafts 2 are for being placed in the accommodation chutes 41 and corresponding one by one, and the positioning shafts 2 can slide along the length direction of the accommodation chutes 41; a plurality of positioning shafts 2 can be detachably inserted and connected to form a rod body; the rust removal chain group includes two rust removal chain belts 3 arranged on both sides of the positioning shafts 2, one ends of the two rust removal chain belts 3 are connected through a positioning ring 33, the positioning ring 33 can be sleeved on the end of one of the positioning shafts 2, and the rust removal chain belt 3 can be detachably connected to the outer surface of the positioning shaft 2; the rust removal chain group is used for abutting and contacting the inner surface of the seamless steel pipe 100; the pushing assembly 5 is used for pushing the positioning shafts 2 in the accommodation chutes 41 towards the seamless steel pipe 100.

[0040] In this application, we horizontally arrange the seamless steel pipe 100 on the bearing driving device 6 and enable it to rotate on its own. On the placement plate 4, we place a sufficient number of positioning shafts 2.

[0041] As Figures 4 to 5 shown in the figure, after starting the pushing assembly 5, pass the end of one of the positioning shafts 2 through the positioning ring 33 and continue to push forward. Then move the placement plate 4, align the positioning shafts 2 on the placement plate 4 with the previously pushed-out positioning shafts 2, and continue to push through the pushing assembly 5 until the two positioning shafts 2 are inserted together. Subsequently, repeat the above steps and gradually increase the number of positioning shafts 2 to form a rod body that meets the length of the corresponding seamless steel pipe 100.

[0042] During the growth process, the positioning ring 33 is sleeved on the end of the rod body, driving the rust removal chain belts 3 on both sides to move synchronously, so that the rust removal chain belts 3 gradually fit and connect to the outer surface of the positioning shaft 2. In this way, a component for removing rust is formed on the outer surface of the rod body.

[0043] After that, drive the seamless steel pipe 100 to rotate through the bearing driving device 6, while the rod body component does not rotate, so as to remove rust from the rusty positions inside the seamless steel pipe 100. This device can freely form the length of the rod body according to the length of the seamless steel pipe 100, thus effectively avoiding the situation where the length of the seamless steel pipe 100 is too long and cannot be satisfied by a general rotating shaft. The device can freely form a rod body component adapted to the length of different seamless steel pipes 100 by inserting and assembling a plurality of positioning shafts 2 into a rod body. In this way, the situation where the traditional rotating shaft cannot be satisfied due to the too long length of the seamless steel pipe 100 can be effectively avoided, thereby improving the processing efficiency. And in the case where the length of the corresponding seamless steel pipe 100 is relatively short, the insertion quantity of the positioning shafts 2 can be reduced, effectively reducing the floor area, and the positioning shafts 2 are easier to move, only requiring manual handling.

[0044] The rust-removing chain belt 3 is separately arranged from the positioning shaft 2, which facilitates the handling of the positioning shaft 2. When it is necessary to pull out the positioning shaft 2, the positioning shaft 2 can be pulled out of the seamless steel pipe 100 by means of other reciprocating pulling devices. When pulling out, the pulling direction is the position opposite to the pushing direction of the pushing component 5. During the pulling process, the rust-removing chain belt 3 will also disengage from the positioning shaft 2.

[0045] Specifically, as Figure 1 、 2 As shown in 6, 7, and 8, two symmetrical limiting parts 411 along the length direction of the accommodation sliding groove 41 are provided on the accommodation sliding groove 41, and two guiding parts 21 corresponding to the limiting parts 411 are provided on the positioning shaft 2. The guiding parts 21 are slidably matched with the limiting parts 411 to limit the rotation of the positioning shaft 2.

[0046] After the positioning shaft 2 is placed in the accommodation sliding groove 41, the guiding part 21 is placed on the limiting part 411. When the pushing component 5 pushes the positioning shaft 2, the guiding part 21 slides along the limiting part 411, limiting the positioning shaft 2 to only move horizontally and not rotate. In this way, when the positioning shafts 2 are inserted subsequently, they can be accurately inserted together. At the same time, the setting of the limiting parts 411 and the guiding parts 21 also facilitates the placement of the positioning shaft 2, ensuring that the placement position is not incorrect. Such a design improves the stability of the equipment and the accuracy of operation, and helps to process the seamless steel pipe 100 more efficiently.

[0047] Specifically, as Figure 1 and Figure 9 shown, it further includes a fixing part 9, a polymerization part 10, and two winding wheels 11. The two winding wheels 11 are respectively arranged on both sides of the fixing part 9. One ends of the two rust-removing chain belts 3 far from the positioning rings 33 are respectively connected to the two winding wheels 11; the fixing part 9 is arranged at the other end of the placement plate 4 relative to the pushing component 5. The fixing part 9 has a through hole 91 adapted to the shape of the positioning shaft 2 and a limiting guide groove 911 is opened inside the through hole 91. The guiding part 21 can be slidably matched with the limiting guide groove 911 to limit the rotation of the positioning shaft 2 relative to the fixing part 9; the polymerization part 10 is arranged on the side of the fixing part 9 far from the placement plate 4. The polymerization part 10 is in a horn shape and gradually narrows from the side close to the placement plate 4 to the side far from the placement plate 4. The polymerization part 10 has two symmetrical guiding arc parts 101, and the guiding arc parts 101 are used to guide the rust-removing chain belt 3 to fit on the positioning shaft 2.

[0048] Under normal circumstances, the rust-removing chain belt 3 is wound around the winding wheel 11. When the positioning shaft 2 is pushed and its end passes through the positioning ring 33 and then continues to move towards the seamless steel pipe 100 on the bearing driving device 6, the rust-removing chain belt 3 will be pulled out synchronously. After entering the polymerization component 10, the rust-removing chain belt 3 is affected by the guiding arc portion 101 of the polymerization component 10 and gradually adheres to the positioning shaft 2.

[0049] The function of the fixing member 9 is that after the positioning shaft 2 penetrates into the fixing member 9, the guiding portion 21 on the positioning shaft 2 cooperates with the limiting guide groove 911 to limit the positioning shaft 2 to only move horizontally and not rotate. After forming the rod body subsequently, at least one positioning shaft 2 still remains in the through hole 91 of the fixing member 9. Therefore, through this fixing member 9, the rod body composed of multiple positioning shafts 2 can be kept from rotating. During the subsequent rotation of the seamless steel pipe 100 driven by the bearing driving device 6, the seamless steel pipe 100 can be effectively rust-removed.

[0050] Such an optimized design makes the cooperation between the rust-removing chain belt 3 and the positioning shaft 2 smoother, ensuring the effective rust-removal of the seamless steel pipe 100. At the same time, the setting of the fixing member 9 maintains the stability of the rod body, ensuring the accuracy and efficiency of the treatment process.

[0051] In this application, a separate winding motor is provided on the winding wheel 11, and the winding motor is used to drive the winding wheel 11 to rotate.

[0052] Specifically, as Figures 2 to 7 shown, the positioning shaft 2 includes a main body portion 22 and a plugging portion 23. The main body portion 22 has a jack 221 adapted to the plugging portion 23 and a sliding hole 222 communicating with the jack 221. A slider 12 is slidably arranged in the sliding hole 222. A groove 121 is provided on the slider 12, and a hook-shaped portion 231 is provided at the end of the plugging portion 23. The hook-shaped portion 231 is adapted to the groove 121; a plurality of limiting grooves 2211 are circumferentially formed on the inner wall of the jack 221, and a plurality of limiting ridges 232 are formed on the outer peripheral wall of the plugging portion 23. The limiting ridges 232 are adapted to the limiting grooves 2211; in the plugged state of the two positioning shafts 2, the hook-shaped portion 231 is hooked in the groove 121, and the limiting ridges 232 are in snap-fit with the limiting grooves 2211 to limit the separation and rotation between the two positioning shafts 2.

[0053] When the two positioning shafts 2 are plugged, the plugging portion 23 of one positioning shaft 2 is inserted into the jack 221 of the main body portion 22 of the other positioning shaft 2. Once inserted, the hook-shaped portion 231 on the plugging portion 23 is engaged with the groove 121 on the slider 12, thereby restricting the plugging portion 23 from detaching from the main body portion 22.

[0054] Meanwhile, the limiting rib 232 on the insertion part 23 is engaged with the limiting groove 2211, thereby restricting the relative rotation of the two positioning shafts 2. Such a design enables the two inserted positioning shafts 2 to maintain a stable connection, preventing accidental detachment or rotation during use, and ensuring the stability of the device and the accuracy of operation.

[0055] Specifically, as Figures 3 to 5 shown, the slider 12 can automatically reset by gravity after being displaced under force.

[0056] During the process of inserting the insertion part 23 of one positioning shaft 2 into the insertion hole 221 of the main body part 22 of the other positioning shaft 2, the hook-shaped part 231 on the insertion part 23 can abut against the slider 12 and push the slider 12 upward. When the hook-shaped part 231 moves to a preset position, the slider 12 automatically falls under the action of gravity and forms a lock with the hook-shaped part 231.

[0057] Through the above design, stable insertion of the insertion part 23 and the main body part 22 is achieved. The hook-shaped part 231 pushes the slider 12 and forms a lock with it, ensuring the reliability and stability of the insertion.

[0058] Specifically, as Figures 3 to 5 shown, the slider 12 has a guiding surface 122 for the end of the insertion part 23 to abut against to drive the slider 12 to move.

[0059] The hook-shaped part 231 can be positioned on the guiding surface 122 and push the slider 12 upward.

[0060] Specifically, as Figure 4 、 Figure 5 and Figure 9 shown, the rust-removing chain belt 3 includes a number of positioning plates 31 sequentially hinged together. A number of steel wires 32 are fixed on the positioning plates 31. Each positioning plate 31 has a first positioning block 311 and a second positioning block 312; the main body part 22 has symmetrically arranged first positioning holes 223 and second positioning holes 224. The second positioning hole 224 is communicated with the insertion hole 221. The insertion part 23 has a third positioning hole 233; in the state where the two positioning shafts 2 are inserted, the first positioning block 311 can be inserted into the first positioning hole 223, and the second positioning hole 224 can be inserted into the second positioning hole 224 and the third positioning hole 233.

[0061] After the positioning plate 31 of the rust-removing chain belt 3 fits on the positioning shaft 2, the first positioning block 311 on the positioning plate 31 is inserted into the first positioning hole 223, and the second positioning block 312 is inserted into the second positioning hole 224 and the third positioning hole 233. Through such a design, after the whole formed by the rod body and the rust-removing chain belt 3 enters the inside of the seamless steel pipe 100, the possibility of the rust-removing chain belt 3 falling off from the rod body can be reduced.

[0062] Meanwhile, the second positioning hole 224 can be inserted into the second positioning hole 224 of one positioning shaft 2 and the third positioning hole 233 of another positioning shaft 2, further enhancing the locking effect between the two positioning shafts 2 and preventing the two positioning shafts 2 from separating.

[0063] Preferably, the positioning plate 31 is in an arc state, and both sides of the positioning plate 31 abut against the guiding portion 21 of the positioning shaft 2. In this way, during the rotation of the seamless steel pipe 100, the positioning plate 31 will not fall off along with the rotation of the positioning shaft 2, ensuring the stability and reliability of the rust removal chain belt 3. Through these optimizations, the equipment can perform internal rust removal more efficiently, ensuring the accuracy and efficiency of the treatment process.

[0064] Specifically, as Figure 9 shown, the load-bearing driving device 6 includes a plurality of rotating rollers 61, a first driving motor 64, a guide rail 62, and a moving frame 63. The moving frame 63 is slidably arranged on the guide rail 62. The plurality of rotating rollers 61 are distributed on the moving frame 63 and are symmetrically arranged. The first driving motor 64 is in transmission connection with the rotating roller 61 on one side and drives the rotating roller 61 to rotate.

[0065] After the seamless steel pipe 100 is arranged on the rotating shaft, the first driving motor 64 drives some of the rotating rollers 61 to rotate, thereby driving the seamless steel pipe 100 to rotate on its own axis.

[0066] Specifically, as Figure 1 and Figure 9 shown, the pushing component 5 includes a push rod motor 51 and a top block 52. The top block 52 is fixed on the push rod of the push rod motor 51. When the push rod motor 51 starts, it drives the top block 52 to move. The top block 52 moves along the limit sliding groove and pushes and inserts the positioning shaft 2 in the limit sliding groove into the through hole 91 of the fixing member 9.

[0067] Specifically, as Figure 1 shown, the placing plate 4 is connected to a driving component 13. The driving component 13 is used to drive the placing plate 4 to move horizontally. The driving component 13 is a lead screw-nut structure.

[0068] Through the lead screw-nut structure, the placing plate 4 is driven to move perpendicular to the direction of the limit sliding groove, so that the limit sliding groove on the placing plate 4 can sequentially correspond to the through hole 91 of the fixing member 9. The lead screw-nut structure includes a servo motor and a lead screw nut. The driving component 13 is a prior art.

[0069] It should be noted that all the directional indications in the embodiments of the present invention, such as up, down, left, right, front, back..., are only used to explain the relative positional relationship and movement conditions between the components in a specific posture, as shown in the drawings. If this specific posture changes, the directional indications will also change accordingly.

[0070] In addition, the descriptions involving "first", "second", etc. in the present invention are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. At the same time, the meaning of "and / or" appearing throughout the text is that it includes three scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0071] The above components are all common standard components or components known to those skilled in the art. Their structures and principles can all be learned by those skilled in the art through technical manuals or by conventional experimental methods.

[0072] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A seamless steel pipe internal treatment device, characterized in that, Including: A plurality of positioning shafts (2), a rust removal chain group, a placement plate (4) capable of horizontal movement, a pushing component (5), and a bearing driving device (6) for bearing a seamless steel pipe (100) and driving the seamless steel pipe (100) to rotate; a plurality of parallel accommodation chutes (41) are provided on the placement plate (4), the positioning shafts (2) are used to be placed in the accommodation chutes (41) one by one corresponding to each other, and the positioning shafts (2) can slide along the length direction of the accommodation chutes (41); a plurality of positioning shafts (2) can be detachably inserted and formed into a rod body; the rust removal chain group includes two rust removal chain belts (3) arranged on both sides of the positioning shaft (2), one end of the two rust removal belts is connected by a positioning ring (33), the positioning ring (33) can be sleeved on the end of one of the positioning shafts (2), and the rust removal chain belt (3) can be detachably connected to the outer surface of the positioning shaft (2); the rust removal chain group is used for abutting and contacting the inner surface of the seamless steel pipe (100); the pushing component (5) is used for pushing the positioning shaft (2) in the accommodation chute (41) towards the seamless steel pipe (100). Two symmetrical limiting parts (411) along the length direction of the accommodation chute (41) are provided on the accommodation chute (41), two guiding parts (21) corresponding to the limiting parts (411) are provided on the positioning shaft (2), and the guiding parts (21) are in sliding fit with the limiting parts (411) to limit the rotation of the positioning shaft (2). It also includes a fixing part (9), a polymerization component (10), and two winding wheels (11). The two winding wheels (11) are respectively arranged on both sides of the fixing part (9), and the ends of the two rust removal chain belts (3) far from the positioning ring (33) are respectively connected to the two winding wheels (11); the fixing part (9) is arranged at the other end of the placement plate (4) relative to the pushing component (5), the fixing part (9) has a through hole (91) adapted to the shape of the positioning shaft (2) and a limiting guide groove (911) is opened inside the through hole (91), and the guiding part (21) can be in sliding fit with the limiting guide groove (911) to limit the rotation of the positioning shaft (2) relative to the fixing part (9); the polymerization component (10) is arranged on the side of the fixing part (9) far from the placement plate (4), the polymerization component (10) is in a horn shape and gradually shrinks from the side close to the placement plate (4) towards the side far from the placement plate (4), and the polymerization component (10) has two symmetrical guiding arc parts (101), and the guiding arc parts (101) are used for guiding the rust removal chain belt (3) to fit on the positioning shaft (2). The positioning shaft (2) comprises a main body (22) and a plug-in portion (23); the main body (22) comprises a plug hole (221) adapted to the plug-in portion (23) and a slide hole (222) connected to the plug hole (221); a slider (12) is slidably arranged in the slide hole (222); a groove (121) is provided on the slider (12); a hook portion (231) is provided at the end of the plug-in portion (23); the hook portion (231) is adapted to the groove (121); the plug-in portion (23) is provided with a hook portion (231) adapted to the groove (121); The inner wall of the hole (221) is provided with a plurality of limiting grooves (2211) in the circumferential direction, and the outer wall of the plug-in portion (23) is provided with a plurality of limiting convex strips (232), the limiting convex strips (232) being adapted to the limiting grooves (2211); when the two positioning shafts (2) are plugged in, the hook-shaped portion (231) is hooked in the groove (121), and the limiting convex strips (232) are engaged with the limiting grooves (2211) to limit the separation and rotation between the two positioning shafts (2).

2. The seamless steel pipe internal treatment equipment according to claim 1, characterized in that, The slider (12) can automatically return to its original position by gravity after being displaced by force.

3. The seamless steel pipe internal treatment equipment according to claim 1, characterized in that, The slider (12) has a guide surface (122) for the end of the plug-in portion (23) to abut against so as to drive the slider (12) to move.

4. The seamless steel pipe internal treatment equipment according to claim 1, characterized in that, The rust-removing chain belt (3) includes a plurality of positioning plates (31) sequentially hinged to each other. A plurality of steel wires are fixed on the positioning plates (31). Each positioning plate (31) is provided with a first positioning block (311) and a second positioning block. The main body portion (22) is provided with symmetrically arranged first positioning holes (223) and second positioning holes (224). The second positioning holes (224) communicate with the jacks (221). The insertion portion (23) is provided with a third Positioning hole (233); when the two positioning shafts (2) are plugged in, the first positioning block (311) can be inserted into the first positioning hole (223), and the second positioning hole (224) can be inserted into the second positioning hole (224) and within the second positioning hole (224).

5. The seamless steel pipe internal treatment equipment according to claim 1, characterized in that, The bearing drive device (6) comprises a plurality of rotating rollers (61), a first driving motor (64), a guide rail (62), and a moving frame (63); the moving frame (63) is slidably arranged on the guide rail (62); the plurality of rotating rollers (61) are distributed on the moving frame (63) and are symmetrically arranged; the first driving motor (64) is drivingly connected to the rotating roller (61) on one side and drives the rotating roller (61) to rotate.

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