Steel pipe derusting and polishing device

Abstract

The utility model relates to the technical field of rust removal and polishing, and provides a steel pipe rust removal and polishing device which comprises a barrel, through holes are correspondingly formed in the two axial ends of the barrel, and a first supporting roller set and a driving mechanism for driving the barrel to rotate are arranged at the bottom of the barrel. A plurality of derusting and polishing mechanisms are arranged on the inner wall of the cylinder body; a plurality of cleaning holes are further formed in the barrel in the circumferential direction and located between every two adjacent rust removing and polishing mechanisms, a cleaning pipeline is arranged at the bottom of the barrel and corresponds to the cleaning holes formed in the barrel in the circumferential direction, a sealing ring is installed on the cleaning pipeline, and the barrel is sleeved with the sealing ring which corresponds to the cleaning holes. The end, away from the barrel, of the cleaning pipeline communicates with a collecting box, and the collecting box communicates with an exhaust fan. According to the steel pipe surface derusting and polishing device, effective derusting and polishing treatment can be conducted on the surface of a steel pipe, scrap iron dust generated in the treatment process can be effectively collected, and dust generated in the polishing process is prevented from affecting the environment.

Description

Technical Field

[0001] The utility model relates to the technical field of rust removal and polishing, in particular to a rust removal and polishing device for a steel pipe. Background Art

[0002] Steel pipes are used to transport fluids and powdered solids, exchange heat, and manufacture mechanical parts and containers. They are also an economical steel material.

[0003] After long-term storage, the surface of the steel pipe is often oxidized and rusted, which makes it impossible to use directly. It is necessary to use rust removal and polishing equipment to remove rust and polish the surface. There are various steel pipe rust removal and polishing equipment on the market. For example, the patent number is CN212762765U, and the patent name is a Chinese utility model patent for a metal steel pipe surface rust removal and polishing machine. It includes a processing table, two mounting shaft seats are fixedly provided on one side of the top of the processing table, and driving wheels are embedded in the two mounting shaft seats. A polishing roller is fixedly connected between the two driving wheels, and a clamping sleeve is fixedly provided on one side of the two support plates. Both sides of the turntable are hingedly connected with movable rods, and one end of the two movable rods is hinged to one side of the two sliders respectively. The utility model is provided at the top of the horizontal plate. There are a turntable and two movable rods, which can be driven to move by rotating the worm wheel and the worm, thereby driving the two support plates and the clamping sleeve to move towards each other under the action of the first slide groove and the second slide groove, and clamping them at both ends of the steel pipe workpiece to fix it. The operation is convenient, and two movably connected shielding plates are arranged on the top of the front side of the cross plate to shield the generated rust chips, so as to avoid the rust chips splashing everywhere and causing cleaning difficulties. Although the above structure can shield the rust chips generated during rust removal and polishing, most of the device is still in an exposed state, and it is difficult to effectively collect the generated iron chips. During the polishing process, there will still be a large amount of iron chips and dust in the working environment of the staff, which will affect the environment while also affecting the health of the staff. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a steel pipe rust removal and polishing device, which can not only effectively remove rust and polish the surface of the steel pipe, but also effectively collect iron filings and dust generated during the treatment process, thereby preventing the dust generated during the polishing process from affecting the environment.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A steel pipe rust removal and polishing device comprises a cylinder, through holes for the steel pipe to pass through are correspondingly arranged at both axial ends of the cylinder, a first supporting roller group and a driving mechanism for driving the cylinder to rotate are arranged at the bottom of the cylinder, and the driving mechanism is arranged correspondingly to the first supporting roller group;

[0007] A plurality of rust removal and polishing mechanisms are arranged and installed on the inner wall of the cylinder, and the rust removal and polishing mechanisms all wrap the steel pipe and form a space for rust removal and polishing of the steel pipe;

[0008] The cylinder body is also provided with a plurality of cleaning holes in the circumferential direction, and the cleaning holes are located between two adjacent rust removal and polishing mechanisms. A cleaning pipe is provided at the bottom of the cylinder body, and the cleaning pipe is arranged corresponding to the cleaning holes arranged in the circumferential direction of the cylinder body. A closed ring is installed on the cleaning pipe, and the closed ring is sleeved on the cylinder body and arranged corresponding to the cleaning holes. The end of the cleaning pipe away from the cylinder body is connected to a collection box, and the collection box is connected to an exhaust fan.

[0009] As an improved technical solution, the driving mechanism includes a driving motor, which is connected to a driving shaft via a coupling. The driving shaft is rotatably mounted on a first support frame. At least one driving wheel is mounted on the driving shaft, which is meshed with a rack for transmission, and the rack is circumferentially fixed on the cylinder.

[0010] As an improved technical solution, the first support roller group includes second support frames arranged opposite to each other, a support shaft is connected between the two second support frames, two first support rollers are installed opposite to each other on the support shaft, and the two first support rollers are respectively located on both sides of the rack.

[0011] As an improved technical solution, the rust removal and polishing mechanism includes a plurality of adjusting devices, which are circumferentially arranged and installed on the inner wall of the cylinder. A fixed block is installed on each of the adjusting devices, and a groove is provided on the fixed block. A metal rust removal brush is installed in the groove, and a space for rust removal and polishing of the steel pipe is formed between the plurality of metal rust removal brushes.

[0012] As an improved technical solution, the metal rust removal brush is arranged in an arc-shaped structure on a side close to the steel pipe.

[0013] As an improved technical solution, the adjusting device includes a base, which is installed on the inner wall of the cylinder. A screw is threadedly installed on the base, and one end of the screw extends to the outside of the base and is connected to the fixing block.

[0014] As an improved technical solution, the adjusting device adopts any one of a pushing electric cylinder, a pushing air cylinder and a pushing oil cylinder.

[0015] As an improved technical solution, the steel pipe rust removal and polishing device further comprises a steel pipe conveying mechanism, and the steel pipe conveying mechanism is arranged at the axial input end and / or output end of the cylinder;

[0016] The axial input end and output end of the cylinder are also provided with brackets, and a second supporting roller for supporting the steel pipe is rotatably mounted on the bracket through a bearing.

[0017] As an improved technical solution, the steel pipe conveying mechanism includes a frame, the frame is sleeved on the steel pipe, a first support seat is installed on the inner wall of the frame, a first conveying roller driven by a motor is rotatably installed on the first support seat, and a second support seat is also installed on the inner wall of the frame, the second support seat is arranged opposite to the first support seat, and a second conveying roller driven by a motor is rotatably installed on the second support seat;

[0018] A pushing device is installed on the top of the frame, the piston rod of the pushing device passes through the side wall of the frame, and a third support seat is installed, a pressure roller is rotatably installed on the third support seat, and the pressure roller, the first conveying roller and the second conveying roller together form a space for axially conveying the steel pipe.

[0019] As an improved technical solution, the first conveying roller and the pressing roller are both arranged parallel to the steel pipe, and the second conveying roller is arranged at an angle to the steel pipe.

[0020] After adopting the above technical solution, the beneficial effects of the utility model are:

[0021] By setting a cylinder, through holes are correspondingly provided at both axial ends of the cylinder, and the through holes are provided to facilitate axial penetration and transportation of the steel pipe. A first supporting roller group and a driving mechanism are provided at the bottom of the cylinder. The driving mechanism and the first supporting roller group are correspondingly provided and together support the cylinder. At the same time, the driving mechanism can drive the cylinder to rotate, and the rotation direction of the cylinder is opposite to that of the steel pipe. Since a number of rust removal and polishing mechanisms are arranged and installed on the inner wall of the cylinder, the rust removal and polishing mechanisms are driven to perform rust removal and polishing treatment on the steel pipe during the rotation of the cylinder.

[0022] A plurality of cleaning holes are arranged on the circumference of the cylinder body, and the cleaning holes are located between two adjacent rust removal and polishing mechanisms. A cleaning pipe is arranged at the bottom of the cylinder body, and the cleaning pipe is arranged correspondingly to the cleaning holes. During the rotation of the cylinder body, when the cleaning holes are connected with the cleaning pipe, the iron filings and dust generated by rust removal and polishing in the cylinder body enter the cleaning pipe through the cleaning holes under the action of the exhaust fan, and enter the collection box through the cleaning pipe for collection, so as to prevent the iron filings and dust from escaping into the surrounding air and affecting the working environment.

[0023] A closing ring is installed on the cleaning pipe. The closing ring is relatively rotatably mounted on the cylinder and is arranged corresponding to the cleaning hole. The closing ring can close the cleaning hole that is not connected to the cleaning pipe, so that the iron filings and dust generated in the cylinder can only enter the collection box through the cleaning pipe and will not escape from other cleaning holes to the surrounding environment, thereby ensuring the collection and treatment effect of the iron filings and dust.

[0024] In summary, the utility model provides a steel pipe rust removal and polishing device, which can not only effectively remove rust and polish the surface of the steel pipe, but also effectively collect iron filings and dust generated during the treatment process, thereby preventing the dust generated during the polishing process from affecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In addition, in the drawings, the components or parts are not necessarily drawn according to the actual scale.

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 It is a structural schematic diagram of the cylinder in the utility model;

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the cylinder in the utility model;

[0029] Figure 4 It is a cross-sectional structural schematic diagram of the rust removal and polishing mechanism in the utility model;

[0030] Figure 5 It is a structural schematic diagram of the steel pipe conveying mechanism in the utility model;

[0031] Reference numerals:

[0032] 1. Cylinder, 2. First support roller group, 201. Second support frame, 202. Support shaft, 203. First support roller, 3. Driving mechanism, 301. Driving motor, 302. Driving shaft, 303. First support frame, 304. Driving wheel, 305. Rack, 4. Rust removal and polishing mechanism, 401. Base, 402. Screw, 403. Fixed block, 404. Metal rust removal brush, 5. Steel pipe, 6. Cleaning hole, 7. Cleaning pipe, 8. Closed ring, 9. Collecting box, 10. Steel pipe conveying mechanism, 101. Frame, 102. First support seat, 103. First conveying roller, 104. Second support seat, 105. Second conveying roller, 106. Pushing device, 107. Third support seat, 108. Pressing roller, 11. Bracket, 12. Second support roller. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0036] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0037] like Figure 1-Figure 4 As shown, a steel pipe rust removal and polishing device comprises a cylinder 1, through holes for the steel pipe 5 to pass through are correspondingly provided at the axial ends of the cylinder 1, and sleeves for supporting the steel pipe 5 are installed on the through holes. The through holes are provided to facilitate the axial penetration and transportation of the steel pipe 5. In this embodiment, openable and closable end covers are respectively provided at both ends of the cylinder 1, and the rust removal and polishing mechanism 4 can be adjusted by opening the end covers. A first supporting roller group 2 and a driving mechanism 3 for driving the cylinder 1 to rotate are provided at the bottom of the cylinder 1, and the driving mechanism 3 is provided corresponding to the first supporting roller group 2;

[0038] A plurality of rust removal and polishing mechanisms 4 are arranged and installed on the inner wall of the cylinder 1. In this embodiment, three groups of rust removal and polishing mechanisms 4 are arranged along the axial direction of the cylinder 1. The rust removal and polishing mechanisms 4 all wrap the steel pipe 5 and form a space for rust removal and polishing of the steel pipe 5. The cylinder 1 is supported by the driving mechanism 3 and the first supporting roller group 2. At the same time, the driving mechanism 3 can drive the cylinder 1 to rotate, and the rotation direction of the cylinder 1 is opposite to the rotation direction of the steel pipe 5. Since a plurality of rust removal and polishing mechanisms 4 are arranged and installed on the inner wall of the cylinder 1, the rust removal and polishing mechanisms 4 are driven to perform rust removal and polishing on the steel pipe 5 during the rotation of the cylinder 1.

[0039] A plurality of cleaning holes 6 are also circumferentially provided on the cylinder 1, and the cleaning holes 6 are located between two adjacent rust removal and polishing mechanisms 4. A cleaning pipe 7 is provided at the bottom of the cylinder 1, and the cleaning pipe 7 is contacted and sealed with the cylinder 1 by a sealing strip. The cleaning pipe 7 is arranged corresponding to the cleaning holes 6 arranged circumferentially on the cylinder 1, and a closing ring 8 is installed on the cleaning pipe 7, and the closing ring 8 is sleeved on the cylinder 1 and arranged corresponding to the cleaning hole 6. In this embodiment, in the axial direction, the width dimension of the closing ring 8 is greater than the width dimension of the cleaning hole 6, so that the cleaning hole 6 can be effectively closed. The end of the cleaning pipe 7 away from the cylinder 1 is connected to the collecting box 9, and the collecting box 9 is connected to an exhaust fan. The exhaust fan can be arranged on the collecting box 9, and can also be arranged outside the collecting box 9, and is connected to the collecting box 9 through a pipe. The design position is multi-position The exhaust fan is connected to the collecting box 9 at one end, and a multi-layer filter screen is provided at the end thereof. The multi-layer filter screen is not marked in the figure. The iron filings are filtered through the filter screen. During the rotation of the cylinder 1, when the cleaning hole 6 is connected to the cleaning pipe 7, the iron filings and dust generated by rust removal and polishing in the cylinder 1 enter the cleaning pipe 7 through the cleaning hole 6 under the action of the exhaust fan, and enter the collecting box 9 through the cleaning pipe 7 for collection, so as to prevent the iron filings and dust from escaping into the surrounding air and affecting the working environment. The cleaning hole 6 that is not connected to the cleaning pipe 7 can be closed by the closing ring 8, so that the iron filings and dust generated in the cylinder 1 can only enter the collecting box 9 through the cleaning pipe 7, and will not escape from other cleaning holes 6 to the surrounding environment, thereby ensuring the collection and treatment effect of the iron filings and dust.

[0040] like Figure 1 and Figure 4As shown, in the embodiment of the utility model, the driving mechanism 3 includes a driving motor 301, which is composed of a motor and a reducer. The output shaft of the driving motor 301 is connected to the driving shaft 302 through a coupling. The driving shaft 302 is rotatably mounted on the first support frame 303 through a bearing. At least one driving wheel 304 is mounted on the driving shaft 302. The driving wheel 304 is meshed with a rack 305 for transmission. The rack 305 is circumferentially fixed on the cylinder 1. In this embodiment, two driving wheels 304 are provided, and two racks 305 are provided. The racks 305 and the driving wheels 304 are correspondingly arranged and meshed with each other. The driving motor 301 drives the cylinder 1 to rotate circumferentially through the driving wheel 304.

[0041] like Figure 2 and Figure 4 As shown, in an embodiment of the utility model, the first support roller group 2 includes second support frames 201 arranged opposite to each other, a support shaft 202 is connected between the two second support frames 201, and two first support rollers 203 arranged opposite to each other are rotatably mounted on the support shaft 202 through bearings, and the two first support rollers 203 are respectively located on both sides of the rack 305.

[0042] like Figure 3-Figure 4 As shown, in the embodiment of the utility model, the rust removal and polishing mechanism 4 includes a plurality of adjusting devices, and the plurality of adjusting devices are circumferentially arranged and installed on the inner wall of the cylinder 1. A fixing block 403 is installed on each adjusting device, and a groove is provided on the fixing block 403. The groove is not marked in the figure. A metal rust removal brush 404 is fixedly installed in the groove by bolts. A space for rust removal and polishing of the steel pipe 5 is formed between the plurality of rust removal brushes. Since the cylinder 1 rotates under the drive of the driving motor 301, the steel pipe 5 also rotates circumferentially during the conveying process, and the rotation direction of the steel pipe 5 is opposite to that of the cylinder 1. The steel pipe 5 is rust removed and polished by a plurality of metal rust removal brushes 404 circumferentially arranged in the cylinder 1.

[0043] like Figure 4 As shown, in an embodiment of the utility model, the metal rust removal brush 404 is arranged in an arc-shaped structure on one side close to the steel pipe 5. By designing the metal rust removal brush 404 in an arc-shaped structure on one side close to the steel pipe 5, it is convenient to closely contact with the surface of the steel pipe 5, so as to better perform rust removal and polishing.

[0044] like Figure 3-Figure 4 As shown, in an embodiment of the utility model, the adjusting device includes a base 401, which is installed on the inner wall of the cylinder 1 by bolts, and a screw 402 is threadedly installed on the base 401, and one end of the screw 402 extends to the outside of the base 401 and is connected to the fixed block 403. By rotating the screw 402, the length of the screw 402 extending to the outside of the base 401 is adjusted, and then the position of the metal rust removal brush 404 is adjusted, so that the metal rust removal brush 404 is close to or away from the steel pipe 5.

[0045] In addition, the adjustment device can also use any one of a push electric cylinder, a push air cylinder and a push oil cylinder. The effect of using the push electric cylinder, the push air cylinder and the push oil cylinder is the same as the adjustment effect of the screw 402 and the base 401.

[0046] In addition, each rust removal and polishing mechanism 4 can be adjusted individually through the adjusting device to achieve a better polishing effect.

[0047] like Figure 1 and Figure 5 As shown, in the embodiment of the utility model, the steel pipe rust removal and polishing device also includes a steel pipe conveying mechanism 10, which is arranged at the axial input end and / or output end of the cylinder 1. Specifically, the steel pipe conveying mechanism 10 can be arranged at the input end of the cylinder 1, or at the output end of the cylinder 1. At the same time, the steel pipe conveying mechanism 10 can be arranged at both the input end and the output end of the cylinder 1 to convey the steel pipe 5. In this embodiment, the steel pipe conveying mechanism 10 is arranged at the axial input end of the cylinder 1;

[0048] In addition, a bracket 11 is provided at the axial input end and output end of the cylinder 1, and a second support roller 12 for supporting the steel pipe 5 is rotatably installed on the bracket 11 through a bearing. The steel pipe 5 is supported by the bracket 11, and the resistance of the steel pipe 5 during axial movement is reduced by setting the second support roller 12.

[0049] like Figure 5 As shown, in the embodiment of the utility model, the steel pipe conveying mechanism 10 includes a frame 101, the frame 101 is sleeved on the steel pipe 5, a first support seat 102 is installed on the inner wall of the frame 101, a first conveying roller 103 driven by a motor is rotatably installed on the first support seat 102 through a bearing, and a second support seat 104 is also installed on the inner wall of the frame 101, the second support seat 104 is arranged opposite to the first support seat 102, and a second conveying roller 105 driven by a motor is rotatably installed on the second support seat 104 through a bearing;

[0050] A pushing device 106 is installed on the top of the frame 101. The pushing device 106 preferably adopts a cylinder. The piston rod of the pushing device 106 passes through the side wall of the frame 101 and is installed with a third support seat 107. A pressure roller 108 is rotatably installed on the third support seat 107 through a bearing. The pressure roller 108, the first conveying roller 103 and the second conveying roller 105 together form a space for axially conveying the steel pipe 5. In this embodiment, the space for rust removal and polishing of the steel pipe 5 formed by the rust removal and polishing mechanism 4 is coaxially arranged with the space for axially conveying the steel pipe 5 formed by the pressure roller 108, the first conveying roller 103 and the second conveying roller 105.

[0051] like Figure 5As shown, in the embodiment of the utility model, the first conveying roller 103 and the pressing roller 108 are both arranged parallel to the steel pipe 5, and the second conveying roller 105 is arranged at an angle to the steel pipe 5. Through the angle structural design of the second conveying roller 105, the first conveying roller 103, the second conveying roller 105 and the pressing roller 108 together form a space for axial conveying of the steel pipe 5. At the same time, during the conveying process, the steel pipe 5 can also rotate circumferentially to cooperate with the reverse rotation of the cylinder 1, so as to better remove rust and polish the steel pipe 5.

[0052] For ease of understanding, the working process of this embodiment is given below:

[0053] like Figure 1-Figure 5 As shown, first, the steel pipe 5 passes through the steel pipe conveying mechanism 10 and enters the cylinder 1, then the pushing device 106 operates and controls the pressing roller 108 to press down, and at the same time, the motor drives the first conveying roller 103 and the second conveying roller 105 to rotate simultaneously, and under the joint action of the first conveying roller 103, the second conveying roller 105 and the pressing roller 108, the steel pipe 5 is driven to move axially and rotate circumferentially at the same time;

[0054] At the same time, the driving motor 301 of the driving mechanism 3 is running, and the driving motor 301 drives the cylinder 1 to rotate synchronously through the driving shaft 302 and the driving wheel 304, and the rotation direction of the cylinder 1 is opposite to the rotation direction of the steel pipe 5. During the continuous axial movement of the steel pipe 5, the steel pipe 5 is comprehensively rust-removed and polished by the metal rust-removing brush 404 of the rust-removing and polishing mechanism 4 in the cylinder 1. The iron filings and dust generated during the treatment process enter the cleaning pipe 7 through the cleaning hole 6 under the action of the exhaust fan, and enter the collection box 9 through the cleaning pipe 7 for collection, so as to prevent the iron filings and dust from escaping into the surrounding air and affecting the working environment.

[0055] In summary, the utility model provides a steel pipe rust removal and polishing device, which can not only effectively remove rust and polish the surface of the steel pipe, but also effectively collect iron filings and dust generated during the treatment process, thereby preventing the dust generated during the polishing process from affecting the environment.

[0056] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A steel pipe rust removal and polishing device, characterized in that: It comprises a cylinder, the two axial ends of the cylinder are respectively provided with through holes for the steel pipe to pass through, the bottom of the cylinder is provided with a first supporting roller group and a driving mechanism for driving the cylinder to rotate, and the driving mechanism is arranged correspondingly to the first supporting roller group; A plurality of rust removal and polishing mechanisms are arranged and installed on the inner wall of the cylinder, and the rust removal and polishing mechanisms all wrap the steel pipe and form a space for rust removal and polishing of the steel pipe; The cylinder body is also provided with a plurality of cleaning holes in the circumferential direction, and the cleaning holes are located between two adjacent rust removal and polishing mechanisms. A cleaning pipe is provided at the bottom of the cylinder body, and the cleaning pipe is arranged corresponding to the cleaning holes arranged in the circumferential direction of the cylinder body. A closed ring is installed on the cleaning pipe, and the closed ring is sleeved on the cylinder body and arranged corresponding to the cleaning holes. The end of the cleaning pipe away from the cylinder body is connected to a collection box, and the collection box is connected to an exhaust fan.

2. A steel pipe rust removal and polishing device as claimed in claim 1, characterized in that: The driving mechanism includes a driving motor, which is connected to a driving shaft via a coupling. The driving shaft is rotatably mounted on a first support frame. At least one driving wheel is mounted on the driving shaft, which is meshed with a rack for transmission. The rack is circumferentially fixed on the cylinder.

3. A steel pipe rust removal and polishing device as claimed in claim 2, characterized in that: The first support roller group includes second support frames that are arranged opposite to each other, a support shaft is connected between the two second support frames, two first support rollers are installed opposite to each other on the support shaft, and the two first support rollers are respectively located on both sides of the rack.

4. A steel pipe rust removal and polishing device as claimed in claim 1, characterized in that: The rust removal and polishing mechanism includes a plurality of adjusting devices, which are circumferentially arranged and installed on the inner wall of the cylinder. A fixing block is installed on each of the adjusting devices, and a groove is provided on the fixing block. A metal rust removal brush is installed in the groove, and a space for rust removal and polishing of the steel pipe is formed between the metal rust removal brushes.

5. A steel pipe rust removal and polishing device as claimed in claim 4, characterized in that: The metal rust removal brush is arranged in an arc-shaped structure on one side close to the steel pipe.

6. A steel pipe rust removal and polishing device as claimed in claim 4, characterized in that: The adjusting device comprises a base, which is mounted on the inner wall of the cylinder. A screw is threadedly mounted on the base, and one end of the screw extends to the outside of the base and is connected to the fixing block.

7. A steel pipe rust removal and polishing device as claimed in claim 4, characterized in that: The adjusting device adopts any one of a pushing electric cylinder, a pushing air cylinder and a pushing oil cylinder.

8. A steel pipe rust removal and polishing device as claimed in claim 1, characterized in that: The steel pipe rust removal and polishing device further comprises a steel pipe conveying mechanism, and the steel pipe conveying mechanism is arranged at the axial input end and / or output end of the cylinder; The axial input end and output end of the cylinder are also provided with brackets, and a second supporting roller for supporting the steel pipe is rotatably mounted on the bracket through a bearing.

9. A steel pipe rust removal and polishing device as claimed in claim 8, characterized in that: The steel pipe conveying mechanism comprises a frame, the frame is sleeved on the steel pipe, a first support seat is installed on the inner wall of the frame, a first conveying roller driven by a motor is rotatably installed on the first support seat, a second support seat is also installed on the inner wall of the frame, the second support seat is arranged opposite to the first support seat, and a second conveying roller driven by a motor is rotatably installed on the second support seat; A pushing device is installed on the top of the frame, the piston rod of the pushing device passes through the side wall of the frame, and a third support seat is installed, a pressure roller is rotatably installed on the third support seat, and the pressure roller, the first conveying roller and the second conveying roller together form a space for axially conveying the steel pipe.

10. A steel pipe rust removal and polishing device as claimed in claim 9, characterized in that: The first conveying roller and the pressing roller are both arranged parallel to the steel pipe, and the second conveying roller is arranged at an angle to the steel pipe.

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