Anti-corrosion steel pipe inner wall treatment device

Abstract

The invention belongs to the technical field of metal machining and manufacturing, and discloses an anti-corrosion steel pipe inner wall treatment device which comprises a base, a supporting assembly and a ball screw are sequentially installed at the top of the base from left to right, a workpiece is placed on the upper surface of the supporting assembly, and a sliding seat is installed on the outer surface of the ball screw in a threaded mode; a motor is installed on the right side of the sliding base, an output shaft of the motor is fixedly connected with a supporting column located in the workpiece, and three sets of first containing grooves are formed in the circumference of the outer surface of the supporting column at equal intervals. According to the device, the moving frames and the emery rollers can always keep parallel movement, when a motor drives a supporting column and the moving frames to rotate, a connecting plate is driven to rotate through the centrifugal effect generated by the supporting column and the moving frames, and the three sets of moving frames and emery rollers are made to synchronously get away from the surface of the supporting column at equal intervals and abut against the inner wall of a workpiece; by means of the design, it can be guaranteed that the outer surface of the emery roll can evenly abut against the inner wall of the workpiece, and the machining precision of the device can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of metal processing and manufacturing, and specifically relates to an anti-corrosion steel pipe inner wall treatment device. Background Art

[0002] The anti-corrosion pipeline is processed by anti-corrosion technology to avoid and slow down the chemical or electrochemical corrosion during transportation, effectively extending the service life of the steel pipe. For the anti-corrosion treatment of the inner wall of the steel pipe, mechanical grinding is generally required to grind off the rust and other impurities on the inner wall of the steel pipe; in the prior art, the inner wall treatment of the anti-corrosion steel pipe is generally divided into the following steps: the steel pipe is placed on a rotating support roller, and the steel pipe rotates synchronously with the support roller, and then the grinding wheel or grinding roller enters the inner wall of the steel pipe, so that the grinding wheel or grinding roller is tangent to the inner wall of the steel pipe, and in the opposite direction. The inner wall of the steel pipe is processed by the grinding wheel or the grinding roller, but the existing grinding wheel or the grinding roller is generally smaller than the inner wall of the steel pipe. Therefore, when grinding, the surface of the grinding wheel or the grinding roller is difficult to completely fit the inner wall of the steel pipe. The problem is that the grinding accuracy of the inner wall of the steel pipe is reduced, and part of the inner wall of the steel pipe cannot be covered. In order to completely process the inner wall of the steel pipe, it is necessary to increase the processing time, and only one set of grinding wheels or grinding rollers is used for each processing, which shortens the replacement and maintenance cycle of the device and increases the maintenance cost. Therefore, it is urgent to solve the problem. Summary of the invention

[0003] The purpose of the present invention is to provide an anti-corrosion steel pipe inner wall treatment device to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an anti-corrosion steel pipe inner wall processing device, comprising a support assembly and a ball screw installed on the top of a base from left to right in sequence, a workpiece is placed on the upper surface of the support assembly, a sliding seat is threadedly installed on the outer surface of the ball screw, a motor is installed on the right side of the sliding seat, the output shaft of the motor is fixedly connected to a support column located in the workpiece, three groups of placement grooves 1 are equidistantly arranged on the circumference of the outer surface of the support column, a connecting plate is movably hinged on the inner wall of the placement groove 1, a moving frame is movably hinged on the other end of the connecting plate, a spring 1 is elastically connected between the connecting plate and the placement groove 1, a rotating shaft is rotatably installed on the inner wall of the connecting plate, and the A sand roller is installed on the outer surface of the rotating shaft, a bracket is fixedly connected to the right side of the movable frame, a transmission column is rotatably installed inside the bracket, a transmission wheel 1 is fixedly installed on the outer surface of the transmission column, the rotating shaft and the transmission column are transmission connected, a sliding sleeve is fixedly connected to the left side of the sliding seat, a sliding cylinder is movably clamped inside the sliding sleeve, and a transmission wheel 2 is fixedly connected to the left end of the sliding cylinder, the axial cross-section shapes of the transmission wheel 2 and the transmission wheel 1 are both isosceles trapezoidal, and they are adapted to abut against each other, a bearing is fixedly installed on the inner annular surface of the transmission wheel 2, and the bearing is rotatably installed on the output shaft of the motor, and a spring 2 is movably sleeved on the outer surface of the sliding sleeve, and the two ends of the spring 2 are elastically connected to the transmission wheel 2 and the sliding sleeve respectively.

[0005] As a preferred solution of the present invention, the support assembly is arranged in two groups and are symmetrically distributed along the axis of the workpiece, each group of the support assembly includes two groups of support rollers, so that the workpiece is rotatably supported on the support assembly, and the top of the base is fixedly installed with multiple groups of guide cylinders located directly below the ball screw, and the internal movable sleeve of the guide cylinder is connected with a guide column, and the top of the guide column is fixedly connected to the ball screw, so that the ball screw can move up and down.

[0006] As a preferred solution of the present invention, a slot is provided at the right end of the rotating shaft, a slot is fixedly connected to the left end of the transmission column, the slot is adapted to be inserted into the slot, the slot is square in shape, the rotating shaft and the transmission column are magnetically connected to each other, and can be detached from the inner wall of the movable frame, and the inner wall of the sand roller and the outer surface of the rotating shaft are in interference fit.

[0007] As a preferred solution of the present invention, the movable frame is provided with two groups of placement grooves 2 on one side facing the support column, the inner walls of the placement grooves 2 and 1 are fixedly connected with fixed columns, both ends of the connecting plate are rotatably installed on the outer surfaces of the two groups of fixed columns, and the connecting plates are equidistantly distributed along the axis of the support column into two groups parallel to each other.

[0008] As a preferred solution of the present invention, the spring 1 is stretched and arranged between the placement groove 1 and the connecting plate, so that the outer surface of the sand roller abuts against the inner wall of the workpiece.

[0009] As a preferred solution of the present invention, the rotation direction of the workpiece is the same as the rotation direction of the motor and the support column, and is the same as the direction of the revolution of the transmission wheel 1 around the axis of the motor, and the friction between the transmission wheel 1 and the transmission wheel 2 is greater than the friction between the sand roller and the inner wall of the workpiece.

[0010] As a preferred solution of the present invention, the transmission wheel one and the transmission wheel two are both made of asbestos-based friction material, the outer surface of the slide cylinder is provided with multiple groups of protrusions, and the inner wall of the sleeve is provided with multiple groups of inner grooves, the protrusions are snap-fitted with the inner grooves, and the slide cylinder can slide freely along the axis of the sleeve and cannot rotate.

[0011] As a preferred solution of the present invention, the transmission wheel 1 is arranged in three groups and is equidistantly distributed on the outer surface of the transmission wheel 2 in a circumferential manner, and the transmission wheel 1 is located on the right side of the workpiece.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. The device has been redesigned so that the sanding roller can automatically abut and align with the inner wall of the workpiece, reducing the deviation of the sanding roller during the grinding of the workpiece. A ball screw is provided to slide and install the slide and the motor, and the motor is driven to move horizontally. A support column connected by the motor has three groups of movable frames and sanding rollers movably hinged on the outer surface of the support column through a connecting plate. Each group of connecting plates is horizontally and equidistantly distributed along the surface of the support column, so that the movable frame and the sanding roller can always keep parallel movement. When the motor drives the support column and the movable frame to rotate, the centrifugal action generated by the support column and the movable frame is used to drive the connecting plate to rotate, and the three groups of movable frames and sanding rollers are equidistantly and synchronously away from the surface of the support column and abut against the inner wall of the workpiece. This design can ensure that the outer surface of the sanding roller can abut evenly against the inner wall of the workpiece, which helps to improve the processing accuracy of the device.

[0014] 2. Then, the transmission wheel 2 which can only move horizontally but not rotate is used to contact the transmission wheel 1, so that when the movable frame drives the transmission wheel 1 to revolve, the transmission wheel 1 is driven to rotate. Due to the elastic force of the spring 2, the friction between the transmission wheel 2 and the transmission wheel 1 is increased, so that the transmission wheel 1 can rotate while rotating, which effectively improves the processing efficiency of the device. Since the number of sand rollers is set to three groups, the two groups of rotation modes of the sand rollers reduce the grinding processing time of the device. At the same time, the three groups of sand rollers extend the time for replacing the sand rollers to three times the original time, which greatly reduces the maintenance cost of the device.

[0015] 3. The device is also provided with a guide cylinder and a guide column so that the ball screw can move up and down freely. The ball screw is connected to the slide, the motor and the support column. Its up and down movement is limited by the distance between the movable frame, the sand roller and the support column. When the motor drives the support column to rotate and the centrifugal force generated by the rotation drives the fixed column to rotate, the fixed column and the movable frame move toward the inner wall of the workpiece together and abut against the inner wall of the workpiece through the sand roller. Since the three groups of sand rollers are equidistantly distributed and pass through the limit of the workpiece, they will drive the support column to move up and down to adapt. At this time, the ball screw will move accordingly. Since the guide cylinder and the guide column only provide a guiding function, the weight of the entire slide, motor, support column movable frame, sand roller, sliding sleeve to spring 2 all acts on the workpiece, which just provides a fixing function for the workpiece and improves the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front perspective schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a side perspective schematic diagram of the overall structure of the present invention;

[0018] Figure 3 It is a front cutaway schematic diagram of the overall structure of the present invention;

[0019] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at center A;

[0020] Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0021] Figure 6 It is a side cutaway schematic diagram of a workpiece, a support column, a movable frame, a connecting plate, a spring 1, a support column and an emery roller of the present invention;

[0022] Figure 7 It is a partial separation schematic diagram of the motor, support column, mobile frame, connecting plate, spring 1, support column, sand roller, bracket, transmission column, transmission wheel 1, bearing, sliding sleeve, sliding cylinder, transmission wheel 2 and spring 2 of the present invention;

[0023] Figure 8 It is a schematic diagram of the separation of the sand roller, the bracket, the transmission column, the first transmission wheel, the bearing, the sliding sleeve, the sliding cylinder, the second transmission wheel and the second spring of the present invention;

[0024] Fig. 9 It is a schematic diagram of the separation of the support column, the movable frame, the fixed column, the connecting plate, the spring 1, the support column and the sand roller of the present invention.

[0025] In the figure: 1. base; 2. support assembly; 3. workpiece; 4. guide cylinder; 5. guide column; 6. ball screw; 7. slide seat; 8. motor; 9. support column; 10. placement slot 1; 11. movable frame; 12. placement slot 2; 13. fixed column; 14. connecting plate; 15. spring 1; 16. rotating shaft; 17. sand roller; 18. bracket; 19. transmission column; 20. transmission wheel 1; 21. bearing; 22. sleeve; 23. slide cylinder; 24. transmission wheel 2; 25. spring 2; 26. slot; 27. clamping column. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figures 1 to 9 As shown, an embodiment of the present invention provides an anti-corrosion steel pipe inner wall processing device, including a support assembly 2 and a ball screw 6 installed on the top of a base 1 from left to right in sequence, a workpiece 3 is placed on the upper surface of the support assembly 2, a slide seat 7 is threadedly installed on the outer surface of the ball screw 6, a motor 8 is installed on the right side of the slide seat 7, the output shaft of the motor 8 is fixedly connected to a support column 9 located in the workpiece 3, three groups of placement grooves 10 are equidistantly arranged on the outer surface of the support column 9, a connecting plate 14 is movably hinged on the inner wall of the placement groove 10, a moving frame 11 is movably hinged on the other end of the connecting plate 14, a spring 15 is elastically connected between the connecting plate 14 and the placement groove 10, a rotating shaft 16 is rotatably installed on the inner wall of the connecting plate 14, and a sand roller is installed on the outer surface of the rotating shaft 16 17, the right side of the mobile frame 11 is fixedly connected with a bracket 18, a transmission column 19 is rotatably installed inside the bracket 18, a transmission wheel 20 is fixedly installed on the outer surface of the transmission column 19, the rotating shaft 16 and the transmission column 19 are transmission-connected, a sleeve 22 is fixedly connected to the left side of the slide seat 7, a slide cylinder 23 is movably clamped inside the sleeve 22, a transmission wheel 24 is fixedly connected to the left end of the slide cylinder 23, the axial cross-section shapes of the transmission wheel 24 and the transmission wheel 1 20 are both isosceles trapezoidal, and they are adapted to abut each other, a bearing 21 is fixedly installed on the inner annular surface of the transmission wheel 24, and the bearing 21 is rotatably installed on the output shaft of the motor 8, a spring 25 is movably sleeved on the outer surface of the sleeve 22, and the two ends of the spring 25 are elastically connected to the transmission wheel 24 and the sleeve 22 respectively;

[0028] The device has been redesigned so that the sand roller 17 can automatically abut and align with the inner wall of the workpiece 3, reducing the deviation of the sand roller 17 during the grinding of the workpiece 3. The slide seat 7 and the motor 8 are slidably installed by providing a ball screw 6, and the motor 8 is driven to move horizontally. The support column 9 connected by the motor 8 has three groups of movable frames 11 and sand rollers 17 movably hinged on the outer surface of the support column 9 through a connecting plate 14. Each group of connecting plates 14 is horizontally and parallelly distributed along the surface of the support column 9, so that the movable frame 11 and the sand roller 17 can always maintain parallel movement. When the motor 8 drives the support column 9 and the movable frame 11 to rotate, the centrifugal action generated by the support column 9 and the movable frame 11 is used to drive the connecting plate 14 to rotate, and the three groups of movable frames 11 and sand rollers 17 are equidistant and synchronously away from the surface of the support column 9, and abut against the inner wall of the workpiece 3. This design can ensure that the outer surface of the sand roller 17 can abut evenly against the inner wall of the workpiece 3, which helps to improve the processing accuracy of the device.

[0029] Then, the transmission wheel 24 which can only move horizontally but not rotate is brought into contact with the transmission wheel 1 20, so that when the movable frame 11 drives the transmission wheel 1 20 to revolve, the transmission wheel 1 20 is driven to rotate on its own. Due to the elastic force of the spring 25, the friction between the transmission wheel 24 and the transmission wheel 1 20 is increased, so that the transmission wheel 1 20 can rotate on its own while rotating, which effectively improves the processing efficiency of the device. Moreover, since the number of sand rollers 17 is set to three groups, the two groups of rotation modes of the sand rollers 17 reduce the grinding processing time of the device on the one hand, and at the same time, the three groups of sand rollers 17 extend the time for the device to replace the sand rollers 17 to three times the original time, which greatly reduces the maintenance cost of the device.

[0030] The support assembly 2 is provided in two groups and symmetrically distributed along the axis of the workpiece 3. Each group of the support assembly 2 includes two groups of support rollers, so that the workpiece 3 is rotatably supported on the support assembly 2. A plurality of groups of guide cylinders 4 located directly below the ball screw 6 are fixedly installed on the top of the base 1. A guide column 5 is movably sleeved inside the guide cylinder 4. The top of the guide column 5 is fixedly connected to the ball screw 6, so that the ball screw 6 can move up and down.

[0031] By providing a guide cylinder 4 and a guide column 5, the ball screw 6 can move up and down freely. The ball screw 6 is connected to the slide 7, the motor 8 and the support column 9. Its up and down movement is limited by the distance between the mobile frame 11, the sand roller 17 and the support column 9. When the motor 8 drives the support column 9 to rotate and drives the fixed column 13 to rotate through the centrifugal force generated by the rotation, the fixed column 13 and the mobile frame 11 move toward the inner wall of the workpiece 3 together and abut against the inner wall of the workpiece 3 through the sand roller 17. Since the three groups of sand rollers 17 are equidistantly distributed, after passing through the limit of the workpiece 3, they will drive the support column 9 to move up and down to adapt. At this time, the ball screw 6 will move accordingly. Since the guide cylinder 4 and the guide column 5 only provide a guiding function, the weight of the entire slide 7, the motor 8, the support column 9, the moving frame 11, the sand roller 17, the sliding sleeve 22 to the spring 25 all act on the workpiece 3, which just provides a fixing function for the workpiece 3 and improves the stability of the device.

[0032] Among them, a card slot 26 is opened at the right end of the rotating shaft 16, and a card column 27 is fixedly connected to the left end of the transmission column 19. The card column 27 is adapted to be inserted into the card slot 26. The shape of the card slot 26 is square. The rotating shaft 16 and the transmission column 19 are magnetically connected to each other and can be detached from the inner wall of the mobile frame 11. The inner wall of the sand roller 17 and the outer surface of the rotating shaft 16 are interference fit;

[0033] After the emery roller 17 is consumed, it can be replaced through the rotating shaft 16. The rotating shaft 16 can be separated from the outer surface of the emery roller 17 by knocking. The rotating shaft 16 is connected to the card slot 26 opened at its end and the card column 27 connected to the left end of the transmission column 19 through transmission. It is a magnetic connection, which is easy to disassemble and connect.

[0034] Among them, the mobile frame 11 is provided with two sets of placement slots 12 on one side facing the support column 9, the inner walls of the placement slots 12 and the placement slots 10 are fixedly connected with fixed columns 13, both ends of the connecting plate 14 are rotatably mounted on the outer surfaces of the two sets of fixed columns 13, and the connecting plates 14 are equidistantly distributed along the axis of the support column 9 into two sets parallel to each other;

[0035] The placement groove 2 12 and the placement groove 1 10 are both used to place the fixed column 13 and the connecting plate 14. The mobile frame 11 and the support column 9 are movably connected through the fixed column 13 and the connecting plate 14. Since the two sets of horizontally distributed connecting plates 14 are parallel to each other, the mobile frame 11 can always remain parallel to the surface of the support column 9 after movement.

[0036] The spring 15 is stretched and arranged between the placement groove 10 and the connecting plate 14, so that the outer surface of the sand roller 17 abuts against the inner wall of the workpiece 3;

[0037] The spring 15 normally pulls the connecting plate 14 to rotate toward the inner wall of the placement groove 10, and enables the movable frame 11 to maintain contact with the surface of the support column 9.

[0038] The rotation direction of the workpiece 3 is the same as the rotation direction of the motor 8 and the support column 9, and is the same as the direction in which the transmission wheel 1 20 revolves around the axis of the motor 8. The friction between the transmission wheel 1 20 and the transmission wheel 2 24 is greater than the friction between the sand roller 17 and the inner wall of the workpiece 3.

[0039] The rotation direction of the workpiece 3 is opposite to the rotation direction of the motor 8 and the support column 9, and opposite to the rotation direction of the transmission wheel 20, so that the surface of the sand roller 17 can be completely evenly in contact with the inner wall of the workpiece 3, and slide and rub against each other, so as to achieve the purpose of uniformly processing the inner wall of the workpiece 3.

[0040] The transmission wheel 1 20 and the transmission wheel 2 24 are both made of asbestos-based friction material. The outer surface of the slide cylinder 23 is provided with multiple groups of protrusions, and the inner wall of the slide sleeve 22 is provided with multiple groups of inner grooves. The protrusions are snap-fitted with the inner grooves, and the slide cylinder 23 can slide freely along the axis of the slide sleeve 22 and cannot rotate.

[0041] The friction coefficient between the transmission wheel 1 20 and the transmission wheel 2 24 is large enough to offset the friction between the sand roller 17 and the inner wall of the workpiece 3, so that the transmission wheel 1 20 can drive the sand roller 17 to rotate in the opposite direction of the rotation of the workpiece 3, thereby achieving the purpose of reverse complete grinding of the inner wall of the workpiece 3.

[0042] The transmission wheel 1 20 is arranged in three groups and is equidistantly distributed on the outer surface of the transmission wheel 2 24 in a circumferential manner. The transmission wheel 1 20 is located on the right side of the workpiece 3.

[0043] The inclined surfaces of the transmission wheel 1 20 and the transmission wheel 2 24 are adapted to abut against each other. Even if the transmission wheel 1 20 moves in the horizontal direction under the action of the moving frame 11, the transmission wheel 2 24 can be pressed by the spring 25, so as to keep the transmission wheel 1 20 and the transmission wheel 2 24 always abutting against each other.

[0044] Working principle:

[0045] First, the workpiece 3 is hoisted on the upper surface of the support assembly 2 by a crane. At this time, the slide 7, the motor 8 and the support column 9 are located at the far right, and the support column 9, the moving frame 11 and the sand roller 17 are all located on the right side of the workpiece 3. The workpiece 3 is made to give way, and the ball screw 6 is started to drive the slide 7, the motor 8 and the support column 9 to move horizontally to the left, and the moving frame 11 as a whole is completely entered into the interior of the workpiece 3;

[0046] Then, the support assembly 2 and the motor 8 are started, the support assembly 2 drives the workpiece 3 to rotate in the forward direction, and the motor 8 drives the support column 9 to rotate in the reverse direction. In the workpiece 3, the support column 9 drives the movable frame 11 and the sand roller 17 to revolve around the axis of the motor 8 through the connecting plate 14, and produces a centrifugal effect, so that the connecting plate 14 deflects around the axis of the fixed column 13 toward the side away from the axis of the motor 8. At this time, the movable frame 11 begins to move away from the support column 9, and drives the sand roller 17 to abut against the inner wall of the workpiece 3. Since the movable frame 11 and the support column 9 are connected by the connecting plates 14 parallel to each other, the movable frame 11 also drives the transmission column 19 and The transmission wheel 1 20 moves horizontally to the right for a certain distance. At this time, the transmission wheel 24 is pushed to the right by the transmission wheel 1 20, and drives the slide 23 to move to the right, compressing the spring 25. As the speed of the support column 9 driven by the motor 8 increases, the mobile frame 11 drives the transmission wheel 1 20 to revolve in the opposite direction around the outer peripheral surface of the transmission wheel 2 24 through the rotating shaft 16, the sand roller 17 and the transmission column 19. Due to the large friction between the transmission wheel 1 20 and the transmission wheel 2 24, the transmission wheel 1 20 rotates in the opposite direction relative to the transmission wheel 2 24 and in the opposite direction of the rotation direction of the workpiece 3, thereby achieving grinding of the inner wall of the workpiece 3.

[0047] When processing workpieces 3 of different sizes, the centrifugal effect generated by the rotation of the mobile frame 11 and the emery roller 17 driven by the support column 9 causes the emery roller 17 to automatically move to a position abutting against the inner wall of the workpiece 3, thereby automatically making the motor 8 and the axis of the workpiece 3 colinear. At this time, the slide 7 moves up with the support column 9 and pushes the guide column 5 and the guide cylinder 4 to provide a guiding effect.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-corrosion steel pipe inner wall processing device, comprising a base (1) having a support assembly (2) and a ball screw (6) installed on the top from left to right, a workpiece (3) placed on the upper surface of the support assembly (2), and a slide seat (7) threadedly installed on the outer surface of the ball screw (6), characterized in that: A motor (8) is installed on the right side of the slide seat (7), and the output shaft of the motor (8) is fixedly connected to a support column (9) located in the workpiece (3). The outer surface of the support column (9) is equidistantly provided with three groups of placement grooves (10). The inner wall of the placement groove (10) is movably hinged with a connecting plate (14), and the other end of the connecting plate (14) is movably hinged with a moving frame (11). A spring (15) is elastically connected between the connecting plate (14) and the placement groove (10). A rotating shaft (16) is rotatably installed on the inner wall of the connecting plate (14), and a sand roller (17) is installed on the outer surface of the rotating shaft (16). A bracket (18) is fixedly connected to the right side of the moving frame (11), and a transmission column (19) is rotatably installed inside the bracket (18). A transmission wheel 1 (20) is fixedly mounted on the outer surface of the moving column (19); the rotating shaft (16) and the transmission column (19) are transmission-connected; a sliding sleeve (22) is fixedly connected to the left side of the sliding seat (7); a sliding cylinder (23) is movably engaged inside the sliding sleeve (22); a transmission wheel 2 (24) is fixedly connected to the left end of the sliding cylinder (23); the axial cross-sections of the transmission wheel 2 (24) and the transmission wheel 1 (20) are both isosceles trapezoids and are mutually adapted and abutted; a bearing (21) is fixedly mounted on the inner ring surface of the transmission wheel 2 (24); the bearing (21) is rotatably mounted on the output shaft of the motor (8); a spring 2 (25) is movably engaged on the outer surface of the sliding sleeve (22); and the two ends of the spring 2 (25) are elastically connected to the transmission wheel 2 (24) and the sliding sleeve (22) respectively.

2. The device for treating the inner wall of an anti-corrosion steel pipe according to claim 1, characterized in that: The support assembly (2) is arranged in two groups and is symmetrically distributed along the axis of the workpiece (3). Each group of the support assembly (2) includes two groups of support rollers, so that the workpiece (3) is rotatably supported on the support assembly (2). The top of the base (1) is fixedly installed with a plurality of groups of guide cylinders (4) located directly below the ball screw (6). The guide cylinder (4) is movably sleeved with a guide column (5). The top of the guide column (5) is fixedly connected to the ball screw (6) so that the ball screw (6) can move up and down.

3. The device for treating the inner wall of an anti-corrosion steel pipe according to claim 2, characterized in that: The right end of the rotating shaft (16) is provided with a card slot (26), the left end of the driving column (19) is fixedly connected with a card column (27), the card column (27) is adapted to be inserted into the card slot (26), the shape of the card slot (26) is square, the rotating shaft (16) and the driving column (19) are magnetically connected to each other and can be detached from the inner wall of the moving frame (11), and the inner wall of the sand roller (17) and the outer surface of the rotating shaft (16) are in interference fit.

4. The device for treating the inner wall of an anti-corrosion steel pipe according to claim 3, characterized in that: The movable frame (11) is provided with two groups of placement grooves (12) on one side facing the support column (9); the inner walls of the placement grooves (12) and the placement grooves (10) are fixedly connected with fixed columns (13); both ends of the connecting plates (14) are rotatably mounted on the outer surfaces of the two groups of fixed columns (13); the connecting plates (14) are equidistantly distributed along the axis of the support column (9) into two groups parallel to each other.

5. The device for treating the inner wall of an anti-corrosion steel pipe according to claim 4, characterized in that: The spring one (15) is stretched and arranged between the placement groove one (10) and the connecting plate (14), so that the outer surface of the sand roller (17) abuts against the inner wall of the workpiece (3).

6. The device for treating the inner wall of an anti-corrosion steel pipe according to claim 5, characterized in that: The rotation direction of the workpiece (3) is the same as the rotation direction of the motor (8) and the support column (9), and is the same as the direction in which the transmission wheel 1 (20) revolves around the axis of the motor (8), and the friction force between the transmission wheel 1 (20) and the transmission wheel 2 (24) is greater than the friction force between the sand roller (17) and the inner wall of the workpiece (3).

7. The device for treating the inner wall of an anti-corrosion steel pipe according to claim 6, characterized in that: The transmission wheel 1 (20) and the transmission wheel 2 (24) are both made of asbestos-based friction material. The outer surface of the slide cylinder (23) is provided with multiple groups of protrusions, and the inner wall of the slide sleeve (22) is provided with multiple groups of inner grooves. The protrusions are snap-fitted with the inner grooves, and the slide cylinder (23) can slide freely along the axis of the slide sleeve (22) and cannot rotate.

8. The device for treating the inner wall of an anti-corrosion steel pipe according to claim 7, characterized in that: The transmission wheel one (20) is arranged in three groups and is equidistantly distributed on the outer surface of the transmission wheel two (24) in a circumferential manner. The transmission wheel one (20) is located on the right side of the workpiece (3).

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