A device for removing rust from the inner wall of steel pipes with different diameters

Abstract

The present invention relates to an inner wall rust removal device suitable for steel pipes of different diameters, comprising a chain pipe, a transmission shaft, a rotary drive assembly, a transmission shaft mounting frame and a base, wherein the rotary drive assembly is mounted on the base, the chain pipe and the transmission shaft are both arranged vertically, one end of the transmission shaft is rotatably connected to the transmission shaft mounting frame and supported by the transmission shaft mounting frame, the other end of the transmission shaft is sleeved with a chain pipe, the output end of the rotary drive assembly is connected to the transmission shaft for driving the transmission shaft to rotate, and the transmission shaft mounting frame is also connected to the base; the outer side of the chain pipe is spirally wound with a chain mounting strip, the chain mounting strip is distributed along the vertical direction of the outer side of the chain pipe, and the chain mounting strip is connected with a plurality of chains. Compared with the prior art, the present invention has the advantages of being able to adapt to the rust removal of steel pipes of different diameters, having a good rust removal effect, occupying a small space and having high working stability.

Description

Technical Field

[0001] The invention relates to the field of steel pipe inner wall rust removal devices, in particular to an inner wall rust removal device suitable for steel pipes with different diameters. Background Art

[0002] During the hot forming process, carbon ash will be precipitated from the steel pipe and adhere to the inner wall of the steel pipe. At the same time, when the steel pipe encounters rain during transportation or is placed in a humid place outdoors, rust will form. When the steel pipe is mechanically processed, the carbon ash and rust will fall into the transmission mechanism of the machine tool, damaging the machine tool accuracy. At the same time, cleaning the pollution also requires manpower and time. In addition, the presence of carbon ash and rust affects the workshop environment and does not meet the workshop 5S management requirements.

[0003] The invention with publication number CN104723223B discloses a device for removing rust from the inner wall of a pipeline, comprising a first end cover and a second end cover which are sealingly installed at both ends of the pipeline, a rust removal vehicle is arranged in the pipeline, the rust removal vehicle comprises an air motor with a double output shaft, a housing of the air motor is provided with a plurality of support shafts, the end of each support shaft is provided with a roller, a grinding disc is fixedly installed on the output shaft of the air motor close to the first end cover, the grinding disc is provided with a plurality of radially arranged support rods, the end of each support rod is provided with a grinding disc, the output shaft of the air motor close to the second end cover is transmission-connected to a shot blasting machine; a traction rope is connected to the end of the grinding disc, the traction rope extends out of the first end cover, one end of the shot blasting machine close to the second end cover is connected to a shot inlet pipe, the air motor is connected to an air inlet pipe, and both the shot inlet pipe and the air inlet pipe extend out of the second end cover.

[0004] This solution has the following defects:

[0005] 1. When derusting steel pipes of different diameters, it is necessary to readjust the support shaft, support rod and other components. The adjustment process is complicated and has a small scope of application;

[0006] 2. After rust removal, rust powder is still easy to adhere to the pipe wall, causing secondary pollution, and the rust removal effect is still defective;

[0007] 3. The structure is complex, which makes the installation of the steel pipe to be derusted inconvenient and affects the derusting efficiency. Summary of the invention

[0008] The purpose of the present invention is to provide a rust removal device for the inner wall of steel pipes with different diameters in order to overcome the defects of the prior art, such as easy to cause secondary pollution, complex structure and small application range.

[0009] The purpose of the present invention can be achieved by the following technical solutions:

[0010] A device for removing rust from the inner wall of steel pipes with different diameters, comprising a chain tube, a transmission shaft, a rotary drive assembly, a transmission shaft mounting frame and a base, wherein the rotary drive assembly is mounted on the base, the chain tube and the transmission shaft are both vertically arranged, one end of the transmission shaft is rotatably connected to the transmission shaft mounting frame and supported by the transmission shaft mounting frame, the other end of the transmission shaft is sleeved with the chain tube, the output end of the rotary drive assembly is connected to the transmission shaft for driving the transmission shaft to rotate, and the transmission shaft mounting frame is also connected to the base; a plurality of chains are connected to the outer side of the chain tube.

[0011] A chain mounting bar is spirally wound around the outer side of the chain tube. The chain mounting bar is distributed along the vertical direction of the outer side of the chain tube. The multiple chains are mounted on the chain mounting bar.

[0012] Furthermore, one side of the chain mounting bar is connected to the chain tube, and the other side is opened to the outside of the chain tube. The chain mounting bar is provided with a plurality of chain mounting holes. The chain includes a connecting ring and a plurality of chain rings connected in sequence, and the connecting ring passes through the connecting mounting holes.

[0013] Furthermore, a side of the chain mounting bar away from the chain tube is inclined downwardly of the chain tube.

[0014] Furthermore, the inner wall rust removal device also includes a first transmission shaft fixing seat, a second transmission shaft fixing seat and a third transmission shaft fixing seat;

[0015] One end of the transmission shaft is mounted on the transmission shaft mounting frame as follows:

[0016] The transmission shaft mounting frame comprises a mounting base plate and a side plate, one end of the side plate is connected to the four sides of the mounting base plate, the other end of the side plate is connected to a base mounting strip, the mounting base plate is provided with a first through hole for the transmission shaft to pass through; the base comprises a first base plate, a connecting foot and a second base plate connected in sequence from top to bottom, the base mounting strip is mounted on the first base plate, and the first base plate is provided with a second through hole for the transmission shaft to pass through;

[0017] The first transmission shaft fixing seat is installed on the upper side of the mounting base plate, and the second transmission shaft fixing seat is installed on the lower side; the third transmission shaft fixing seat is installed on the upper side of the first base plate, and the rotation drive assembly is installed on the lower side; the first transmission shaft fixing seat, the second transmission shaft fixing seat and the third transmission shaft fixing seat are all provided with transmission shaft fixing holes; the lower end of the transmission shaft is sequentially connected to the first transmission shaft fixing seat, the second transmission shaft fixing seat, the third transmission shaft fixing seat and the output end of the rotation drive assembly; and the diameter of the lower end of the transmission shaft decreases in a step-like manner.

[0018] Furthermore, the inner wall rust removal device also includes an inner sleeve, which is arranged between the chain tube and the transmission shaft, the length of the inner sleeve is smaller than the length of the chain tube, and the inner sleeve is located in the chain tube near one end of the rotary drive assembly.

[0019] Furthermore, the diameter of the region where the chain tube is provided on the transmission sleeve decreases in a stepwise manner or continuously.

[0020] Furthermore, the rotary drive assembly includes a first transmission wheel, a synchronous belt, a second transmission wheel, a motor and a motor mounting seat, the first transmission wheel is fixedly connected to the transmission shaft, the motor is mounted on the motor mounting seat, the output end of the motor is connected to the second transmission wheel, and the synchronous belt is respectively connected to the first transmission wheel and the second transmission wheel.

[0021] Furthermore, the inner wall rust removal device also includes a guard shield and a guard shield bracket, the guard shield is located on the outside of the chain tube, the bottom surface of the guard shield is provided with a through hole, the transmission shaft passes through the through hole, the bottom end side of the guard shield is provided with a vent, the bottom end of the guard shield bracket is connected to the base, and the guard shield bracket is connected to the outer wall of the guard shield.

[0022] Furthermore, the shield is provided with openings extending from the upper end to the middle thereof for allowing the robotic arm to place the steel pipe.

[0023] Furthermore, the inner wall rust removal device also includes a limiting bracket, a telescopic cylinder and a limiting shaft, the limiting shaft is rotatably connected to the limiting bracket, the fixed end of the telescopic cylinder is fixedly connected to the limiting bracket, one end of the limiting shaft is connected to the output end of the telescopic cylinder, and the other end is provided with a chain tube fixing groove, and the chain tube fixing groove matches the shape and size of the top end of the chain tube.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] (1) When the present invention is used to remove rust from the inner wall of a steel pipe, the chain spirally distributed following the chain mounting strip can fully contact the inner wall of the steel pipe to ensure thorough cleaning; due to the characteristic that the chain can be deformed at will, the chain of the chain pipe can adapt to the rust removal of steel pipes of different diameters, and the chain can also be controlled by controlling the rotation speed of the chain pipe to make the chain angle different. The greater the rotation speed and the greater the angle, the better the rust removal effect, which can meet various rust removal requirements; and the rust removal process of this scheme is short in time. During the rust removal process, the gripper of the shaft joint robot can stay in place, and the next process can be carried out directly after the rust removal is completed, which has high work efficiency and can realize automated production;

[0026] The chain tube and transmission shaft are both set vertically, and the steel pipe is also placed vertically, which can also facilitate the rust powder to fall off without causing accumulation or secondary pollution;

[0027] The invention as a whole also has the advantages of simple structure, convenient manufacturing, small space occupation, and high working stability.

[0028] (2) The chain mounting bar opens outward from the chain tube, so that the chain on the chain mounting bar will not be attached to the chain tube, and it is not easy to get entangled.

[0029] (3) The side of the chain mounting strip away from the chain tube is inclined downwardly from the chain tube, which is closer to the opening direction of the chain during operation. Therefore, most of the tension of the chain during operation is offset by the adhesion at the connection between the chain mounting strip and the chain tube, and other component forces are smaller, so the chain mounting strip is not easy to fall off.

[0030] (4) Through the structure of the first transmission wheel, the synchronous belt and the second transmission wheel, the motor is placed outside the rotating area, thereby reducing the impact of motor vibration on rust removal work, and the installation position of the motor is also more flexible.

[0031] (5) In order to solve the problem of chain tube shaking during rotation, the present invention provides a number of safeguard measures, such as selecting a chain tube made of quenched stainless steel, which has a higher density and better stability during rotation; embedding a thinner inner sleeve inside the chain tube to increase the overall weight and improve stability during rotation; retaining a sufficient common contact area between the chain tube and the drive shaft and reinforcing them with bolts to improve stability; arranging a rotatable limiting shaft above the chain tube to fix the chain tube from above during rotation to reduce shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of the inner wall rust removal device applicable to steel pipes with different diameters in an embodiment of the present invention;

[0033] Figure 2 Schematic diagram of the connection state between the chain pipe and the chain in an embodiment of the present invention;

[0034] Figure 3 Schematic diagram of the structure of the chain tube in the embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the chain in an embodiment of the present invention;

[0036] Figure 5 An exploded view of the inner wall rust removal device in an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of the bottom structure of the inner wall rust removal device in an embodiment of the present invention;

[0038] Figure 7 It is a structural schematic diagram of a rotation drive assembly in an embodiment of the present invention;

[0039] Figure 8It is a structural schematic diagram of an inner wall rust removal device connected with a protective cover in an embodiment of the present invention;

[0040] Fig. 9 It is a schematic diagram of the structure of the protective cover in an embodiment of the present invention;

[0041] Fig.10 It is a first structural schematic diagram of an inner wall rust removal device connected with a limiting shaft in an embodiment of the present invention;

[0042] Fig.11 It is a second structural schematic diagram of the inner wall rust removal device connected with the limiting shaft in an embodiment of the present invention;

[0043] Fig.12 Schematic diagram of the working state of the inner wall rust removal device in the embodiment of the present invention;

[0044] In the figure, 1, chain tube, 2, transmission shaft, 3, rotation drive assembly, 301, first transmission wheel, 302, synchronous belt, 303, second transmission wheel, 304, motor, 305, motor mounting seat, 4, transmission shaft mounting frame, 401, mounting base, 402, side plate, 403, base mounting strip, 5, base, 501, first base plate, 502, connecting foot, 503, second base plate, 6, chain mounting strip, 601 , chain mounting hole, 7, chain, 701, connecting ring, 702, chain ring, 8, inner sleeve, 9, shield, 901, vent, 902, opening, 10, shield bracket, 11, first transmission shaft fixing seat, 12, second transmission shaft fixing seat, 13, third transmission shaft fixing seat, 14, limiting bracket, 15, telescopic cylinder, 16, limiting shaft, 161, chain tube fixing groove, 17, steel pipe, 18, axis joint robot. DETAILED DESCRIPTION

[0045] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0046] Example 1

[0047] like Figure 1 and Figure 2As shown, this embodiment provides an inner wall rust removal device suitable for steel pipes with different diameters, including a chain tube 1, a transmission shaft 2, a rotation drive assembly 3, a transmission shaft mounting frame 4 and a base 5. The rotation drive assembly 3 is installed on the base 5. The chain tube 1 and the transmission shaft 2 are both vertically arranged. One end of the transmission shaft 2 can be rotatably connected to the transmission shaft mounting frame 4 and supported by the transmission shaft mounting frame 4. The other end of the transmission shaft 2 is sleeved with the chain tube 1. The output end of the rotation drive assembly 3 is connected to the transmission shaft 2 for driving the transmission shaft 2 to rotate. The transmission shaft mounting frame 4 is also connected to the base 5. A plurality of chains 7 are connected to the outer side of the chain tube 1. Preferably, the plurality of chains 7 are evenly distributed on the outer side of the chain tube 1.

[0048] In order to facilitate the installation of the chain and ensure the reliability of the chain connection, as a preferred embodiment, a chain mounting bar 6 is spirally wound around the outer side of the chain tube 1, and the chain mounting bar 6 is distributed along the vertical direction of the outer side of the chain tube 1, and multiple chains 7 are installed on the chain mounting bar 6.

[0049] like Fig.12 As shown, when in use, the steel pipe 17 is driven to move downward from the upper end of the chain pipe 1 through a driving member, such as a mechanical arm, an axial joint robot 18, etc., until the inner side of the steel pipe 17 corresponds to the chain of the chain pipe 1, and the transmission shaft 2 is driven to rotate by the rotating drive component 3, thereby driving the chain pipe 1 to rotate. During the rotation process, the chains of the chain pipe 1 gradually open, contact the inner wall of the steel pipe 17, and scrape off the carbon dust and rust on the inner wall of the steel pipe 17.

[0050] When the scheme is used to remove rust from the inner wall of a steel pipe, the chain spirally distributed following the chain mounting strip 6 can fully contact the inner wall of the steel pipe to ensure thorough cleaning; due to the characteristic that the chain can be deformed at will, the chain 7 of the chain tube 1 can adapt to the rust removal of steel pipes of different diameters, and the rotation speed of the chain tube 1 can also be controlled to make the chain opening angle different. The greater the rotation speed and the greater the opening angle, the better the rust removal effect, which can meet various rust removal needs; and the rust removal process of this scheme is time-saving. During the rust removal process, the gripper of the shaft joint robot does not need to leave, and the next process can be carried out directly after the rust removal is completed, which has high work efficiency and can realize automated production.

[0051] The chain tube 1 and the transmission shaft 2 are both arranged vertically, and the steel tube is also placed vertically, which can also facilitate the shedding of rust powder without causing accumulation or secondary pollution.

[0052] The solution has a simple structure, is easy to manufacture, occupies a small space, and has high working stability.

[0053] The thickness of the chain 7 is within the range of 1 mm to 2 mm, preferably 1.5 mm.

[0054] like Figure 3As shown, as a preferred embodiment, one side of the chain mounting bar 6 is connected to the chain tube 1, and the other side is open to the outside of the chain tube 1. The chain mounting bar 6 is provided with a plurality of chain mounting holes 601. The chain 7 includes a connecting ring 701 and a plurality of chain rings 702 connected in sequence, and the connecting ring 701 passes through the connecting mounting holes. The chain mounting holes 601 on the chain mounting bar 6 are preferably evenly arranged, so that the rust removal effect on the inner wall of the steel pipe is better and more uniform.

[0055] like Figure 4 As shown, in this embodiment, each chain 7 includes a connecting ring 701 and three chain rings 702 .

[0056] The chain mounting bar 6 opens outward from the chain tube 1, so that the chain on the chain mounting bar 6 will not be attached to the chain tube 1, and it is not easy to get entangled; the chain 7 is installed through the chain mounting hole 601 on the chain mounting bar 6, which is convenient for production and manufacturing.

[0057] As a preferred embodiment, the chain tube 1 and the drive shaft 2 are separate structures, and there is a partial nested contact area at the assembly point of the two, and they are reinforced by multiple bolts. In this embodiment, the length of the nested contact area between the chain tube 1 and the drive shaft 2 is 250 mm, and four bolts are evenly reinforced along the outer side of the chain tube 1.

[0058] As a preferred embodiment, the side of the chain mounting bar 6 away from the chain tube 1 is inclined downwardly toward the chain tube 1, closer to the opening direction of the chain during operation, so that most of the tension of the chain during operation is offset by the adhesion force at the connection between the chain mounting bar 6 and the chain tube 1, and other component forces are smaller, so the chain mounting bar 6 is not easy to fall off.

[0059] like Figure 5 and Figure 6 As shown, as a preferred embodiment, the inner wall rust removal device further includes a first transmission shaft fixing seat 11, a second transmission shaft fixing seat 12 and a third transmission shaft fixing seat 13;

[0060] One end of the transmission shaft 2 is mounted on the transmission shaft mounting frame 4. Specifically:

[0061] The transmission shaft mounting frame 4 includes a mounting base plate 401 and a side plate 402, one end of the side plate 402 is connected to the four sides of the mounting base plate 401, the other end of the side plate 402 is connected to a base mounting strip 403, and the mounting base plate 401 is provided with a first through hole 404 for the transmission shaft 2 to pass through; the base 5 includes a first base plate 501, a connecting foot 502 and a second base plate 503 connected in sequence from top to bottom, the base mounting strip 403 is installed on the first base plate 501, and the first base plate 501 is provided with a second through hole for the transmission shaft 2 to pass through;

[0062] A first transmission shaft fixing seat 11 is installed on the upper side of the mounting base 401, and a second transmission shaft fixing seat 12 is installed on the lower side. A third transmission shaft fixing seat 13 is installed on the upper side of the first base plate 501, and a rotation drive assembly 3 is installed on the lower side. The first transmission shaft fixing seat 11, the second transmission shaft fixing seat 12 and the third transmission shaft fixing seat 13 are all provided with transmission shaft fixing holes. The lower end of the transmission shaft 2 is sequentially connected to the first transmission shaft fixing seat 11, the second transmission shaft fixing seat 12, the third transmission shaft fixing seat 13 and the output end of the rotation drive assembly 3, and the diameter of the lower end of the transmission shaft 2 decreases in a step-like manner.

[0063] The first transmission shaft fixing seat 11, the second transmission shaft fixing seat 12 and the third transmission shaft fixing seat 13 all provide strong support and horizontal limit for the transmission shaft. The three-bearing design has a long service life and makes the rotation of the transmission shaft more stable. The diameter of the lower end of the transmission shaft 2 is reduced in a step-by-step manner, so that the transmission shaft 2 can be supported by the third transmission shaft fixing seat 13 and can also be easily driven to rotate.

[0064] like Figure 2 As shown, as a preferred embodiment, the inner wall rust removal device also includes an inner sleeve 8, which is arranged between the chain tube 1 and the transmission shaft 2. The length of the inner sleeve 8 is less than the length of the chain tube 1, and the inner sleeve 8 is located in the chain tube 1 at one end close to the rotating drive assembly 3.

[0065] The provision of the inner sleeve 8 increases the weight of the lower end of the chain tube 1 and the transmission shaft 2 as a whole, so that the center of gravity moves downward, the chain tube 1 is less likely to shake, and the overall rotation process of the device is more stable.

[0066] As a preferred embodiment, the chain tube 1 is made of a quenched stainless steel round tube to reduce the shaking problem.

[0067] As a preferred embodiment, the diameter of the area where the chain tube 1 is sleeved on the transmission shaft 2 is reduced in a step-by-step or continuously manner, which also moves the center of gravity downward, making the chain tube 1 less likely to shake and making the overall rotation process of the device more stable.

[0068] The rotation drive component 3 can be a rotation drive motor, whose output end is connected to the transmission shaft to directly drive the transmission shaft to rotate. Figure 7 As shown, as a preferred embodiment, the rotary drive assembly 3 includes a first transmission wheel 301, a synchronous belt 302, a second transmission wheel 303, a motor 304 and a motor mounting seat 305, the first transmission wheel 301 is fixedly connected to the transmission shaft 2, the motor 304 is mounted on the motor mounting seat 305, the output end of the motor 304 is connected to the second transmission wheel 303, and the synchronous belt 302 is respectively connected to the first transmission wheel 301 and the second transmission wheel 303.

[0069] Through the structure of the first transmission wheel 301, the synchronous belt 302 and the second transmission wheel 303, the motor can be placed outside, eliminating the influence of the motor tension vibration on the working process of the device, and the motor installation position is also more flexible.

[0070] like Figure 8 and 9 As shown, as a preferred embodiment, the inner wall rust removal device also includes a shield 9 and a shield bracket 10. The shield 9 is located on the outside of the chain tube 1. The bottom surface of the shield 9 is provided with a through hole, and the transmission shaft 2 passes through the through hole. The bottom end side of the shield 9 is provided with a vent 901. The bottom end of the shield bracket 10 is connected to the base 5, and the shield bracket 10 is connected to the outer wall of the shield 9. The setting of the shield 9 realizes effective protection of the working area and avoids accidental risks. The vent 901 set on the side of the bottom end of the shield 9 is not easy to accumulate dust, and the vent 901 can be connected to an exhaust fan for dust removal.

[0071] Further, as a preferred embodiment, the shield 9 is provided with openings 902 distributed from the upper end to the middle thereof for the robot arm to put the steel pipe in. A detection switch is installed at the upper end of the shield 9 to detect whether the steel pipe is put in, thereby automatically starting the rotation drive assembly 3.

[0072] like Fig.10 and 11 As shown, as a preferred embodiment, the inner wall rust removal device also includes a limiting bracket 14, a telescopic cylinder 15 and a limiting shaft 16. The limiting shaft 16 is rotatably connected to the limiting bracket 14. The fixed end of the telescopic cylinder 15 is fixedly connected to the limiting bracket 14. One end of the limiting shaft 16 is connected to the output end of the telescopic cylinder 15, and the other end is provided with a chain tube fixing groove 161, which matches the shape and size of the top end of the chain tube 1.

[0073] When in use, after placing the steel pipe in the working position, the limiting shaft 16 can be driven by the telescopic cylinder 15 to rotate to the top of the chain tube 1, so that the top of the chain tube 1 is fixed by the chain tube fixing groove 161 of the limiting shaft 16, making it difficult for the chain tube 1 to shake, further ensuring the stability of the chain tube 1 during rotation.

[0074] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A device for removing rust from the inner wall of steel pipes of different diameters, characterized in that: The invention comprises a chain tube (1), a transmission shaft (2), a rotary drive assembly (3), a transmission shaft mounting frame (4) and a base (5), wherein the rotary drive assembly (3) is mounted on the base (5), the chain tube (1) and the transmission shaft (2) are both arranged vertically, one end of the transmission shaft (2) is rotatably connected to the transmission shaft mounting frame (4) and supported by the transmission shaft mounting frame (4), the other end of the transmission shaft (2) is sleeved with the chain tube (1), the output end of the rotary drive assembly (3) is connected to the transmission shaft (2) for driving the transmission shaft (2) to rotate, and the transmission shaft mounting frame (4) is also connected to the base (5); a plurality of chains (7) are connected to the outer side of the chain tube (1); A chain mounting bar (6) is spirally wound around the outer side of the chain tube (1), the chain mounting bar (6) is distributed in a vertical direction along the outer side of the chain tube (1), and the plurality of chains (7) are mounted on the chain mounting bar (6); One side of the chain mounting bar (6) is connected to the chain tube (1), and the other side is open to the outside of the chain tube (1); the chain mounting bar (6) is provided with a plurality of chain mounting holes (601); the chain (7) comprises a connecting ring (701) and a plurality of chain rings (702) connected in sequence; the connecting ring (701) passes through the chain mounting hole (601); The side of the chain mounting bar (6) away from the chain tube (1) is inclined downwardly from the chain tube (1); The rotary drive assembly (3) comprises a first transmission wheel (301), a synchronous belt (302), a second transmission wheel (303), a motor (304) and a motor mounting seat (305); the first transmission wheel (301) is fixedly connected to the transmission shaft (2); the motor (304) is mounted on the motor mounting seat (305); an output end of the motor (304) is connected to the second transmission wheel (303); and the synchronous belt (302) is respectively connected to the first transmission wheel (301) and the second transmission wheel (303).

2. The inner wall rust removal device applicable to steel pipes with different diameters according to claim 1, characterized in that: The inner wall rust removal device further comprises a first transmission shaft fixing seat (11), a second transmission shaft fixing seat (12) and a third transmission shaft fixing seat (13); One end of the transmission shaft (2) is mounted on the transmission shaft mounting frame (4) specifically as follows: The transmission shaft mounting frame (4) comprises a mounting base plate (401) and a side plate (402), one end of the side plate (402) being connected to the four sides of the mounting base plate (401), the other end of the side plate (402) being connected to a base mounting strip (403), the mounting base plate (401) being provided with a first through hole (404) for the transmission shaft (2) to pass through; the base (5) comprises a first base plate (501), a connecting foot (502) and a second base plate (503) connected in sequence from top to bottom, the base mounting strip (403) being mounted on the first base plate (501), the first base plate (501) being provided with a second through hole for the transmission shaft (2) to pass through; The first transmission shaft fixing seat (11) is installed on the upper side of the mounting base plate (401), and the second transmission shaft fixing seat (12) is installed on the lower side; the third transmission shaft fixing seat (13) is installed on the upper side of the first base plate (501), and the rotation drive assembly (3) is installed on the lower side; the first transmission shaft fixing seat (11), the second transmission shaft fixing seat (12), and the third transmission shaft fixing seat (13) are all provided with transmission shaft fixing holes; the lower end of the transmission shaft (2) is sequentially connected to the first transmission shaft fixing seat (11), the second transmission shaft fixing seat (12), the third transmission shaft fixing seat (13), and the output end of the rotation drive assembly (3); and the diameter of the lower end of the transmission shaft (2) decreases in a step-like manner.

3. The inner wall rust removal device applicable to steel pipes with different diameters according to claim 1, characterized in that: The inner wall rust removal device further comprises an inner sleeve (8), which is arranged between the chain tube (1) and the transmission shaft (2), the length of the inner sleeve (8) being shorter than the length of the chain tube (1), and the inner sleeve (8) being located inside the chain tube (1) at one end close to the rotary drive assembly (3).

4. The inner wall rust removal device applicable to steel pipes with different diameters according to claim 1, characterized in that: The diameter of the area of ​​the transmission shaft (2) where the chain tube (1) is sleeved is reduced in steps or continuously.

5. The inner wall rust removal device applicable to steel pipes with different diameters according to claim 1, characterized in that: The inner wall rust removal device further comprises a guard (9) and a guard bracket (10); the guard (9) is located outside the chain tube (1); a through hole is provided on the bottom surface of the guard (9); the transmission shaft (2) passes through the through hole; a ventilation hole (901) is provided on the side surface of the bottom end of the guard (9); the bottom end of the guard bracket (10) is connected to the base (5); and the guard bracket (10) is connected to the outer wall of the guard (9).

6. The inner wall rust removal device applicable to steel pipes with different diameters according to claim 1, characterized in that: The inner wall rust removal device further comprises a limiting bracket (14), a telescopic cylinder (15) and a limiting shaft (16); the limiting shaft (16) is rotatably connected to the limiting bracket (14); a fixed end of the telescopic cylinder (15) is fixedly connected to the limiting bracket (14); one end of the limiting shaft (16) is connected to the output end of the telescopic cylinder (15); and the other end is provided with a chain tube fixing groove (161); the chain tube fixing groove (161) matches the shape and size of the top end of the chain tube (1).

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