Rust removal device

Abstract

The utility model provides a derusting device and belongs to the field of steel pipe derusting, the derusting device comprises a derusting cylinder, a cleaning cylinder and a driving mounting box, the driving mounting box is fixedly connected with the derusting cylinder, the derusting cylinder is fixedly connected with the cleaning cylinder through a partition plate, a sand blasting nozzle and a sand slinging device are arranged in the derusting cylinder, and a supporting and positioning device and a cleaning device are arranged in the cleaning cylinder. The driving device is fixedly connected with the driving mounting box. The supporting and positioning device is connected with the partition plate. The cleaning device is fixedly connected with the cleaning cylinder. Through holes are formed in the two ends of the driving mounting box, through holes are formed in the two ends of the rust removal cylinder, through holes are formed in the center of the partition plate, and through holes are formed in the two ends of the cleaning cylinder. And the through holes of the derusting cylinder, the cleaning cylinder, the driving mounting box and the partition plate are coaxial. The device has the beneficial effects that dust pollution in the sand blasting process is prevented, and the derusting efficiency and quality of large-batch steel pipes are improved.

Description

Technical Field

[0001] The invention belongs to the field of steel pipe rust removal, in particular to a rust removal device. Background Art

[0002] At present, in order to save transportation costs, most steel pipes are purchased in bulk, and then stored and used directly when needed. However, because steel pipes are prone to rust during storage, it is necessary to remove rust from the surface of the steel pipe. The commonly used rust removal methods have their own advantages and disadvantages. The better rust removal method is sandblasting. Sandblasting has low cost and good effect. However, the splashing sand and gravel of sandblasting can easily cause environmental pollution and personal injury, and sandblasting requires manual operation to facilitate 360-degree rust removal of the steel pipe, which limits the work efficiency of sandblasting.

[0003] For example, patent CN202223496278.1 makes the sandblasting and rust removal device easy to move, but does not solve the problems of sandblasting pollution and low efficiency. Sand and gravel splashing and dust are the main environmental pollution problems, and the problems of too long steel pipes and incomplete sandblasting surfaces are also the main reasons for the low efficiency of existing sandblasting and rust removal devices. Because existing sandblasting and rust removal are all manually operated, small size and easy to carry and move are the main improvement directions. However, steel pipe rust removal is often carried out in the storage of large quantities of longer steel pipes. The demand for portability is less than the demand for work efficiency, which means that the efficiency and pollution problems faced by large-scale rust removal work have not been solved. Summary of the invention

[0004] The present invention provides a rust removal device which can prevent dust pollution during sandblasting and improve the rust removal efficiency and quality of large-scale steel pipes, and is particularly suitable for rust removal of large-scale long steel pipes. The technical problem to be solved is that the current rust removal of large-scale steel pipes has the problems of dust pollution and low work efficiency.

[0005] The technical solution adopted by the present invention is:

[0006] A rust removal device comprises a rust removal cylinder, a cleaning cylinder and a drive mounting box, wherein the drive mounting box is fixedly connected to the rust removal cylinder, which is fixedly connected to the cleaning cylinder via a partition plate, a sandblasting nozzle and a sand throwing device are arranged inside the rust removal cylinder, a supporting positioning device and a cleaning device are arranged inside the cleaning cylinder, a drive device is arranged inside the drive mounting box, the drive device is fixedly connected to the drive mounting box, the supporting positioning device is connected to the partition plate, the cleaning device is fixedly connected to the cleaning cylinder, through holes are arranged at both ends of the drive mounting box, through holes are arranged at both ends of the rust removal cylinder, a through hole is arranged in the center of the partition plate, and through holes are arranged at both ends of the cleaning cylinder, and the through holes of the rust removal cylinder, the cleaning cylinder, the drive mounting box and the partition plate are all coaxial.

[0007] Furthermore, a sandblasting nozzle is fixedly connected to the top of the rust removal cylinder, a sand throwing device is arranged below the rust removal cylinder, and two sand throwing devices are arranged side by side.

[0008] Furthermore, the sand blasting device comprises a guide plate and a sand blasting drum, wherein the guide plate is wrapped around two sides of the sand blasting drum, and the guide plates are located in the middle of the rust removal drum and the spacing therebetween gradually decreases.

[0009] Furthermore, the driving device includes a lower driving shaft, an upper driving shaft and a positioning frame, the axis of the lower driving shaft and the axis of the rust removal cylinder intersect in space, the axis of the upper driving shaft and the axis of the rust removal cylinder intersect in space, the ends of the upper driving shaft and the lower driving shaft are movably connected to the fixed block, the fixed block is fixedly connected to the rust removal cylinder, the upper driving shaft and the lower driving shaft are connected to the driving motor through gear meshing at one end away from the rust removal cylinder, the upper driving shaft and the lower driving shaft are connected to the fixing plate through bearings at one end close to the driving motor, positioning frames are arranged on both sides of the axis of the rust removal cylinder, and the positioning frames are connected to the driving installation box through an adjusting rod.

[0010] Furthermore, the positioning frame is configured as a concave structure on one side close to the axis of the rust removal cylinder, and a roller is disposed at the concave portion.

[0011] Furthermore, the supporting positioning device includes a positioning ring, a telescopic rod and a positioning rod, the positioning ring is movably connected to the telescopic rod and the positioning rod, the telescopic rod is movably connected to a cleaning cylinder at one end away from the positioning ring, the positioning rod is pointed to the center of the positioning ring at one end away from the positioning ring and a clamping rod is provided, a positioning groove and a positioning sliding groove are provided on the partition plate, the positioning rod is slidably connected to the positioning groove via a clamping sliding rod, and the positioning ring is slidably connected to the positioning sliding groove via the positioning sliding rod.

[0012] Furthermore, the clamping rod is bent in an arc shape relative to the positioning rod, and at least three positioning rods are provided.

[0013] Furthermore, the cleaning device includes a cylindrical cleaning plate, a conical cleaning plate and an exhaust port, the cylindrical cleaning plate is fixedly connected to the conical cleaning plate, the cylindrical cleaning plate is connected to the cleaning cylinder through a clamping rod, an exhaust port is arranged below the cleaning cylinder, and the exhaust port is fixedly connected to the fan.

[0014] Furthermore, the cylindrical cleaning plate is composed of two arc-shaped plates, and the conical cleaning plate is composed of two arc-shaped conical plates.

[0015] Furthermore, the blades of the sandblasting drum are spiral blades, and a baffle is provided at the tail end of the spiral blades of the sandblasting drum in the feeding direction.

[0016] The above structure has the following beneficial effects:

[0017] 1. The sandblasting nozzle and the sand throwing device cooperate with each other to perform sandblasting and rust removal in the upper and lower directions, which overcomes the problems of low efficiency and incomplete cleaning of existing sandblasting and rust removal for pipe fittings, so that the pipe fittings can be rust-free quickly and in all directions.

[0018] 2. Since a driving device is used to transport the feeding pipes, the pipes can be rotated while being fed, so that the pipes can be rust-free in all directions, overcoming the problem that the existing rust removal equipment cannot automatically perform sandblasting rust removal on all sides of the pipes, so that the pipes can automatically complete all-round rust removal, and the rust removal effect is uniform.

[0019] 3. The use of a supporting positioning device for support and positioning can avoid the problem of axis deviation caused by long pipe transportation distance, overcome the problem of excessive bearing capacity of the driving device due to axis deviation, and overcome the problem of incomplete rust removal of pipes due to pipe deviation due to long transportation distance, thereby ensuring the quality and stability of rust removal work.

[0020] 4. The cleaning device is used to clean the outer surface of the steel pipe, clean the residue and dust after sandblasting, and use a fan to remove the dust, which overcomes the problem that traditional sandblasting and rust removal work needs to be cleaned and dusted separately after completion. The residue and dust of the rust removal work are removed, which is convenient for subsequent cleaning work and prevents environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a stereogram of the present invention;

[0022] Figure 2 is a top view of the present invention;

[0023] Figure 3 The present invention Figure 2 Sectional view at AA;

[0024] Figure 4 The present invention Figure 2 Sectional view at the middle BB;

[0025] Figure 5 The present invention Figure 2 Sectional view at CC;

[0026] Figure 6 It is a schematic diagram of the internal structure of the cleaning tube of the present invention;

[0027] Figure 7 It is a schematic diagram of the internal structure of the rust removal cylinder of the present invention;

[0028] Figure 8 It is a schematic diagram of the sand throwing structure of the present invention.

[0029] In the figure:

[0030] 1. Rust removal cylinder; 2. Cleaning cylinder; 3. Drive installation box; 4. Partition plate; 5. Fan; 6. Sand blasting device; 7. Drive device; 8. Support positioning device; 9. Cleaning device; 11. Sand blasting nozzle; 12. Sand discharge hole; 61. Guide plate; 62. Sand blasting drum; 71. Drive motor; 72. Lower drive shaft; 73. Upper drive shaft; 74. Fixed block; 75. Positioning frame; 76. Adjustment rod; 77. Fixed plate; 81. Positioning ring; 82. Telescopic rod; 83. Positioning rod; 84. Positioning groove; 85. Clamping sliding rod; 86. Clamping rod; 87. Positioning sliding rod; 88. Positioning sliding groove; 91. Cylindrical cleaning plate; 92. Conical cleaning plate; 93. Clamping rod; 94. Exhaust port. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] like Figure 1-8 As shown:

[0033] A rust removal device comprises a rust removal cylinder 1, a cleaning cylinder 2 and a drive installation box 3, wherein the drive installation box 3 is connected to the rust removal cylinder 1 by screws, the rust removal cylinder 1 is fixedly connected to the cleaning cylinder 2 by a partition plate 4, and the rust removal cylinder 1 and the cleaning cylinder 2 are connected by screws on both sides of the partition plate 4, a sandblasting nozzle 11 and a sand throwing device 6 are arranged inside the rust removal cylinder 1, and rust is removed from the top and bottom respectively by the sandblasting nozzle 11 and the sand throwing device 6, and as the steel pipe rotates, the outer ring of the steel pipe can be sandblasted and sand thrown for several times in all directions to remove rust, thereby improving the effect and efficiency of rust removal, a supporting positioning device 8 and a cleaning device 9 are arranged inside the cleaning cylinder 2, and the supporting positioning device is used to remove rust from the top and bottom respectively. 8 is used for support to avoid the steel pipe being offset and skewed due to excessive conveying distance. A driving device 7 is arranged inside the driving installation box 3. The driving device 7 provides a driving force for rotation and feeding for the conveyed steel pipe, so that the pipe can rotate while moving forward. The driving device 7 is fixedly connected to the driving installation box 3, the supporting and positioning device 8 is connected to the partition plate 4, and the cleaning device 9 is fixedly connected to the cleaning cylinder 2. Through holes are arranged at both ends of the driving installation box 3, through holes are arranged at both ends of the rust removal cylinder 1, a through hole is arranged in the center of the partition plate 4, and through holes are arranged at both ends of the cleaning cylinder 2. The through holes of the rust removal cylinder 1, the cleaning cylinder 2, the driving installation box 3 and the partition plate 4 are all coaxial.

[0034] A sandblasting nozzle 11 is plugged into the top of the rust removal cylinder 1, a sand throwing device 6 is arranged below the rust removal cylinder 1, two sand throwing devices 6 are arranged side by side, and a sand discharge hole 12 is arranged at the bottom of the rust removal cylinder 1. Figure 5As shown, the sand blasting device 6 includes a guide plate 61 and a sand blasting drum 62. The guide plate 61 is covered on both sides of the sand blasting drum 62. The guide plate 61 is used to guide the sand particles after rust removal by the sandblasting nozzle 11 to the bottom of the sand blasting drum 62. The sand blasting drum 62 can use gravel to blast and remove rust, thereby completing secondary rust removal at the bottom. The guide plate 61 does not block the movement of gravel to the bottom of the rust removal cylinder 1, and is used to guide most of the gravel to the sand blasting drum 62. Two sand blasting drums 62 are provided, and the sand blasting drum 62 is used to quickly rotate and blast sand through a rotating shaft. The guide plates 61 are located in the middle of the rust removal cylinder 1 with a gradually decreasing spacing, and are used to guide the gravel thrown by the sand blasting drum 62 to be concentrated on the bottom of the steel pipe for rust removal, thereby improving the number and effect of rust removal.

[0035] like Figure 8 As shown, the blades of the sandblasting drum 62 are spiral blades and multiple blades are arranged like a grille. The radius of the blade gradually increases from the steel pipe feed port to the discharge port. The shape of the blade gradually twists from small to large with the blade radius to form a spiral feeding structure. The blade is located at the maximum radius and is a straight plate without twisting. A baffle is arranged at the tail end of the spiral blade feeding direction of the sandblasting drum 62. The feeding spiral blade is used to guide the gravel to accelerate and feed to the rear. The straight plate blade uses centrifugal force to blast sand and cooperates with the guide plate 61 to blast sand and remove rust. The baffle is used to prevent gravel from flying out from the rear due to feeding, thereby improving the sandblasting effect. Two sandblasting devices 6 are arranged side by side. The two sandblasting devices 6 will not block the concentration and discharge of gravel at the bottom of the rust removal cylinder 1, thereby avoiding the jamming of the sandblasting device 6 due to excessive concentration of gravel at the bottom, and also facilitating the discharge of gravel from the bottom and circulating sandblasting.

[0036] The driving device 7 includes a lower driving shaft 72, an upper driving shaft 73 and a positioning frame 75. The axis of the lower driving shaft 72 intersects with the axis of the rust removal cylinder 1 in space, and the axis of the upper driving shaft 73 intersects with the axis of the rust removal cylinder 1 in space. The axes of the upper driving shaft 73 and the lower driving shaft 72 intersect with the rust removal cylinder 1, that is, intersect with the axis of the steel pipe, so that when the upper driving shaft 73 and the lower driving shaft 72 rotate, the component of the friction force forms a forward feeding force and a radial rotational force, so that the steel pipe continues to advance and rotate during the rust removal process, which is convenient for all-round rust removal of the outer surface, and automatically feeds and discharges, which is convenient for rust removal and greatly saves manpower. The ends of the upper driving shaft 73 and the lower driving shaft 72 are fixedly connected by bearings The fixed block 74 is welded to the rust removal cylinder 1, and friction sleeves are arranged on the outer surfaces of the upper drive shaft 73 and the lower drive shaft 72. The friction sleeves can be made of rubber material. By replacing friction sleeves of different radii, it can be convenient to adapt to steel pipes of different radii. The upper drive shaft 73 and the lower drive shaft 72 are connected to the drive motor 71 through gear meshing at one end away from the rust removal cylinder 1, and the upper drive shaft 73 and the lower drive shaft 72 are connected to the fixed plate 77 through bearings at one end close to the drive motor 71. Positioning frames 75 are arranged on both sides of the axis of the rust removal cylinder 1, and the positioning frames 75 are connected to the drive installation box 3 through an adjusting rod 76. The adjusting rod 76 adopts a cylinder or a hydraulic cylinder, and the positioning frame 75 is adjusted by the adjusting rod 76 to facilitate the positioning and clamping of different pipe diameters.

[0037] The positioning frame 75 is arranged as a concave structure near the axis of the rust removal cylinder 1, and a roller is arranged at the concave part, and the concave part is V-shaped. The steel pipe is clamped by the V-shaped structure to prevent the steel pipe from displacement, thereby achieving a positioning effect.

[0038] The supporting positioning device 8 includes a positioning ring 81, a telescopic rod 82 and a positioning rod 83. The positioning ring 81 is a circular ring. The positioning ring 81 is connected to the telescopic rod 82 and the positioning rod 83 by a hinge. The telescopic rod 82 adopts a cylinder or a hydraulic cylinder. The end of the telescopic rod 82 away from the positioning ring 81 is connected to the inner wall of the cleaning cylinder 2 by a hinge. The end of the positioning rod 83 away from the positioning ring 81 points to the center of the positioning ring 81 and is provided with a clamping rod 86. The clamping rod 86 adopts an arc structure, and the side of the clamping rod 86 close to the center of the cleaning cylinder 2 is a smooth surface or A rotating wheel is sleeved on the outside of the clamping rod 86. The clamping rod 86 is used to support and position the steel pipe. A positioning groove 84 and a positioning sliding groove 88 are set on the partition plate 4. The positioning rod 83 is slidably connected to the positioning groove 84 through the clamping sliding rod 85. The positioning rod 83 is welded to the clamping sliding rod 85. The clamping sliding rod 85 is slidably connected to the positioning groove 84. The positioning ring 81 is slidably connected to the positioning sliding groove 88 through the positioning sliding rod 87. The positioning ring 81 is welded to the positioning sliding rod 87. The positioning sliding rod 87 is slidably connected to the positioning sliding groove 88. The telescopic rod 82 telescopes and pushes the positioning ring 81 to rotate in coordination with the positioning sliding groove 88. During the rotation, the positioning ring 81 pushes the positioning rod 83 to move. The positioning rod 83 moves under the guidance of the positioning groove 84. During the movement of the positioning rod 83, the clamping rod 86 always remains tangent to the steel pipe coaxial with the cleaning tube 2, so that the clamping rod 86 is used for positioning support.

[0039] The clamping rod 86 is bent in an arc shape relative to the positioning rod 83, and at least three positioning rods 83 are provided to complete the positioning clamping and only retain the rotation and movement in one direction.

[0040] like Figure 6 As shown, the cleaning device 9 includes a cylindrical cleaning plate 91, a conical cleaning plate 92 and an exhaust port 94. The cylindrical cleaning plate 91 is welded to the conical cleaning plate 92. The cylindrical cleaning plate 91 is connected to the cleaning cylinder 2 through a clamping rod 93. The clamping rod 93 is a cylinder or a hydraulic cylinder. An exhaust port 94 is arranged below the cleaning cylinder 2. The exhaust port 94 is connected to the fan 5 through a flange. The cylindrical cleaning plate 91 is composed of two arc-shaped plates, and the conical cleaning plate 92 is composed of two arc-shaped conical plates. The fan 5 can take away the residual after cleaning. Slag and dust, avoid air and environmental pollution, a sponge or sandpaper is set on the working surface of the cylindrical cleaning plate 91 to clean the residue and dust, in order to avoid the inconvenience of docking, it is guided by the conical cleaning plate 92, the conical cleaning plate 92 and the cylindrical cleaning plate 91 are both partially cylindrical, and the conical cleaning plate 92 and the cylindrical cleaning plate 91 are set relative to each other, and the two relative cylindrical cleaning plates 91 are driven by the clamping rod 93 to move towards each other, so as to complete the clamping and adjust the friction force, so as to facilitate the cleaning work.

[0041] Embodiment 2:

[0042] The fixed block 74 is connected to the end of the rust removal cylinder 1 through a slideway and a slider. The upper drive shaft 73 and the lower drive shaft 72 can be made close to the steel pipe without adjusting the friction structure radius of the upper drive shaft 73 and the lower drive shaft 72. The upper drive shaft 73 and the lower drive shaft 72 are adjusted in relative position through the slideway and the slider. In conjunction with the movement and adjustment of the slideway and the slider, the fixed plate 77 adopts a lockable telescopic structure, cylinder or hydraulic cylinder.

[0043] How this example works:

[0044] During use, the steel pipe is passed through the drive installation box 3, and the upper drive shaft 73 and the lower drive shaft 72 are frictionally connected. The adjusting rod 76 is used to drive the positioning frame 75 to complete the clamping and positioning of the steel pipe, and the driving motors 71 of the upper drive shaft 73 and the lower drive shaft 72 are respectively started to rotate the upper drive shaft 73 and the lower drive shaft 72, and the friction force with an angle is used to make the steel pipe move forward while keeping rotating. The motor is started to drive the rotating shaft of the sand throwing roller 62 to rotate, so that the sand throwing roller 62 starts to rotate, and the sand blasting nozzle 11 sprays sand and gravel from above to remove rust. When the sand and gravel fall into the bottom of the rust removal cylinder 1, they gather at the bottom of the rust removal cylinder 1 and can be discharged from the sand discharge hole 12. The excess sand and gravel are guided by the guide plate 61 to the sand throwing roller 62. The sand throwing roller 62 uses the spiral feeding blades to cooperate with the baffle to throw the sand and gravel out. Under the gathering and guidance of the guide plate 61, the steel pipe is rusted from below. Through the rust removal in the upper and lower directions and the rotation of the steel pipe itself, the outer surface of the steel pipe is rusted in all directions. Compared with traditional manual rust removal and mechanical rust removal, it is more convenient and faster because of the protection of the rust removal cylinder 1. It will not splash and hurt people, and it also avoids dust pollution. After rust removal, it enters the cleaning cylinder 2 through the partition plate 4. The supporting positioning device 8 installed on the partition plate 4 positions and supports the steel pipe. The positioning ring 81 is driven to rotate by the telescopic rod 82, and the positioning ring 81 drives the positioning rod 83 to move. The clamping rod 86 at the lower end of the positioning rod 83 is guided by the positioning groove to clamp and position the steel pipe through tangential contact to avoid the deviation of the steel pipe. The steel pipe enters the middle of the cylindrical cleaning plate 91 under the guidance of the conical cleaning plate 92, and the cylindrical cleaning plate 91 is adjusted by the clamping rod 93. The contact pressure of the plate 91 is then used, and the sponge or sandpaper on the working surface of the cylindrical cleaning plate 91 is used to complete the cleaning and sweeping of the debris, and the residue and dust are discharged through the exhaust port 94 and the fan 5; the rust removal work and the cleaning work after rust removal are completed by the cleaning cylinder 2 and the rust removal cylinder 1. At the same time, the fully enclosed working mode avoids dust pollution, improves the work efficiency of all-round rust removal on the outer surface of the steel pipe, simplifies the rust removal work, and improves the convenience of work. Through the combination of sand blasting above and sand throwing below, the quality of rust removal work is effectively guaranteed and improved.

[0045] The directional terms mentioned in the present invention, such as "up", "down", "left", "right", etc., are only for better and clearer explanation and understanding of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation of the present invention.

[0046] The above is an explanation of the preferred embodiments of the present invention, but it cannot be understood as a limitation of the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A rust removal device, comprising a rust removal cylinder (1), a cleaning cylinder (2) and a drive mounting box (3), wherein the drive mounting box (3) is fixedly connected to the rust removal cylinder (1), and the rust removal cylinder (1) is fixedly connected to the cleaning cylinder (2) via a partition plate (4), characterized in that: A sandblasting nozzle (11) and a sand throwing device (6) are arranged inside the rust removal cylinder (1), a supporting positioning device (8) and a cleaning device (9) are arranged inside the cleaning cylinder (2), a driving device (7) is arranged inside the driving installation box (3), the driving device (7) is fixedly connected to the driving installation box (3), the supporting positioning device (8) is connected to the partition plate (4), the cleaning device (9) is fixedly connected to the cleaning cylinder (2), through holes are arranged at both ends of the driving installation box (3), the rust removal cylinder (1) and the cleaning cylinder (2), and a through hole is arranged at the center of the partition plate (4).

2. A rust removal device according to claim 1, characterized in that: The top of the rust removal cylinder (1) is fixedly connected to a sandblasting nozzle (11), a sand throwing device (6) is arranged below the rust removal cylinder (1), two sand throwing devices (6) are arranged side by side, and a sand discharge hole (12) is arranged at the bottom of the rust removal cylinder (1).

3. A rust removal device according to claim 2, characterized in that: The sand blasting device (6) comprises a guide plate (61) and a sand blasting drum (62), wherein the guide plate (61) covers both sides of the sand blasting drum (62), and the guide plate (61) is located in the middle of the rust removal cylinder (1) and the distance therebetween gradually decreases.

4. A rust removal device according to claim 2, characterized in that: The driving device (7) comprises a lower driving shaft (72), an upper driving shaft (73) and a positioning frame (75); the axis of the lower driving shaft (72) intersects with the axis of the rust removal cylinder (1) in space; the axis of the upper driving shaft (73) intersects with the axis of the rust removal cylinder (1) in space; the ends of the upper driving shaft (73) and the lower driving shaft (72) are both movably connected to a fixing block (74); the fixing block (74) is fixedly connected to the rust removal cylinder (1); the ends of the upper driving shaft (73) and the lower driving shaft (72) away from the rust removal cylinder (1) are connected to a driving motor (71) through gear meshing; the ends of the upper driving shaft (73) and the lower driving shaft (72) close to the driving motor (71) are connected to a fixing plate (77) through bearings; positioning frames (75) are arranged on both sides of the axis of the rust removal cylinder (1); the positioning frames (75) are connected to the driving installation box (3) through an adjusting rod (76).

5. A rust removal device according to claim 4, characterized in that: The positioning frame (75) is arranged as a concave structure on one side close to the axis of the rust removal cylinder (1), and a roller is arranged at the concave portion.

6. A rust removal device according to claim 4, characterized in that: The supporting positioning device (8) comprises a positioning ring (81), a telescopic rod (82) and a positioning rod (83); the positioning ring (81) is movably connected to the telescopic rod (82) and the positioning rod (83); one end of the telescopic rod (82) away from the positioning ring (81) is movably connected to the cleaning cylinder (2); one end of the positioning rod (83) away from the positioning ring (81) points to the center of the positioning ring (81) and is provided with a clamping rod (86); a positioning groove (84) and a positioning sliding groove (88) are provided on the partition plate (4); the positioning rod (83) is slidably connected to the positioning groove (84) through a clamping sliding rod (85); and the positioning ring (81) is slidably connected to the positioning sliding groove (88) through a positioning sliding rod (87).

7. A rust removal device according to claim 6, characterized in that: The clamping rod (86) is bent in an arc shape relative to the positioning rod (83), and at least three positioning rods (83) are provided.

8. A rust removal device according to claim 6, characterized in that: The cleaning device (9) comprises a cylindrical cleaning plate (91), a conical cleaning plate (92) and an exhaust port (94); the cylindrical cleaning plate (91) is fixedly connected to the conical cleaning plate (92); the cylindrical cleaning plate (91) is connected to the cleaning cylinder (2) via a clamping rod (93); an exhaust port (94) is arranged below the cleaning cylinder (2); and the exhaust port (94) is fixedly connected to the fan (5).

9. A rust removal device according to claim 8, characterized in that: The cylindrical cleaning plate (91) is composed of two arc-shaped plates, and the conical cleaning plate (92) is composed of two arc-shaped conical plates.

10. A rust removal device according to claim 3, characterized in that: The blades of the sandblasting drum (62) are spiral blades, and a baffle is provided at the tail end of the spiral blades of the sandblasting drum (62) in the feeding direction.

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