A device for grinding and anti-rusting inner wall of steel pipe

Abstract

The present invention discloses a device for grinding and anti-rusting the inner wall of a steel pipe and spraying a paint, which belongs to the technical field of steel pipe production and processing equipment, and comprises a workbench and a polishing mechanism, and is characterized in that two support frames are arranged on the workbench, and a movable roller and two support rollers are rotatably arranged between the two support frames, the two support rollers are located below the movable rollers, and the three are distributed in an isosceles triangle, and an adjusting member for adjusting the relative position of the movable rollers is arranged on the support frame, and a first transmission member for driving one of the support rollers to rotate is also arranged on the support frame. The present invention utilizes the movable roller and the two support rollers to fix the steel pipe, and drives the support roller and the steel pipe to rotate through the first transmission member, while the transmission shaft and the polishing head remain stationary, so that the polishing head can grind and polish the inner wall of the rotating steel pipe, and spray paint it after polishing.

Description

Technical Field

[0001] The invention discloses a steel pipe inner wall grinding and anti-rust painting device, belonging to the technical field of steel pipe production and processing equipment. Background Art

[0002] Steel pipes are widely used in the steel pipe field due to their stable chemical properties, cold resistance, heat resistance, pressure resistance, corrosion resistance and fire resistance. In the manufacturing process of steel pipes, due to the existence of hot rolling, cold rolling and other manufacturing processes, unevenly distributed burrs are inevitably formed on the inner surface of the steel pipe, resulting in poor flatness of the inner surface of the steel pipe, so it is necessary to grind and polish it, and then spray paint to improve its corrosion resistance, which can achieve the effect of rust prevention and extend the service life of the steel pipe.

[0003] When grinding and polishing a steel pipe, the existing grinding device mostly uses a clamp to clamp one end of the steel pipe. During the rotation of the steel pipe, the grinding head is used to approach the inner wall of the steel pipe to complete the grinding and polishing process. However, as the length of the steel pipe increases, the other end of the steel pipe lacks clamping during the grinding and polishing process, causing the other end to swing due to inertia, resulting in uneven processing of the two ends by the grinding head, and the steel pipe is also prone to bending due to force. At the same time, after the grinding and polishing is completed, it needs to be transferred to the painting device for painting. This cannot effectively improve the overall processing efficiency of the steel pipe. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to provide a device for grinding and anti-rusting the inner wall of a steel pipe.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme: a device for grinding and anti-rusting the inner wall of a steel pipe and spraying paint, comprising a workbench and a polishing mechanism, wherein two support frames are arranged on the workbench, and a movable roller and two support rollers are rotatably arranged between the two support frames, the two support rollers are located below the movable rollers, and the three are distributed in an isosceles triangle, an adjusting member for adjusting the relative position of the movable rollers is arranged on the support frame, and a first transmission member for driving one of the support rollers to rotate is also arranged on the support frame, the polishing mechanism comprises a transmission shaft, a polishing head, a first fixed seat and a second fixed seat, the transmission shaft is arranged parallel to the support rollers, and the two ends of the transmission shaft are respectively connected to the first fixed seat and the second fixed seat, and the polishing mechanism comprises a transmission shaft, a polishing head, a first fixed seat and a second fixed seat, the transmission shaft is arranged parallel to the support rollers, and the two ends of the transmission shaft are connected to the first fixed seat and the second fixed seat, respectively. There are multiple grinding heads, and they are installed on the transmission shaft at equal intervals. A main shaft is rotatably arranged on the first fixed seat, one end of the transmission shaft is connected to the main shaft, and the other end is connected to the second fixed seat. The first fixed seat and the second fixed seat are both slidably arranged with the workbench, and the sliding of the two is parallel to the axial direction of the transmission shaft. Guide holes are arranged in the main shaft and the transmission shaft, and a nozzle is arranged between two adjacent polishing heads corresponding to the transmission shaft, the nozzle is connected with the guide hole, and a one-way valve is arranged in the nozzle, a second transmission member for driving the first fixed seat to slide horizontally is arranged on the workbench, and a mounting plate is arranged under the workbench, and a third transmission member for driving the support frame to rise and fall vertically is arranged on the mounting plate.

[0006] Preferably, two adjusting members are provided and are installed at both ends of the movable roller, the adjusting members include a first slider, a first spring, a connecting rod and a nut, the first slider is in a cross-shaped structure, the support frame is provided with a first sliding groove cooperating with the first slider, one end of the connecting rod is fixedly connected to the first slider, and the other end passes through the support frame and is threadedly connected to the nut, the first spring is sleeved on the outside of the connecting rod and applies a downward force to the first slider, and one end of the movable roller is rotatably connected to the first slider.

[0007] Preferably, the first transmission member includes a first motor, a driving gear and a driven gear, the first motor is fixed on the support frame, the driving gear is fixed on the output shaft of the first motor, and the driven gear is fixed on one end of the support roller and meshes with the driving gear for transmission.

[0008] Preferably, the second transmission member includes a first screw and a first hand wheel, the first screw is rotatably connected to the workbench, the first hand wheel is fixed to the end of the first screw, and the first fixing seat is threadedly connected to the first screw.

[0009] Preferably, the second fixed seat includes a sliding seat, a second screw rod, a second slider and a pressure block, the sliding seat is slidably arranged with the workbench, two of the second sliders and the pressure block are each provided, a second slide groove is provided on the sliding seat, the pressure block is in a T-shaped structure, and is fixed to the sliding seat by bolts, both ends of the second screw rod are rotatably connected to the pressure block, and a second hand wheel is also provided at one end of the second screw rod, a positioning boss is provided on the transmission shaft, grooves matching the positioning bosses are provided on the two second sliders, the second screw rod is provided with two sections of threads with opposite rotation directions, the two second sliders are slidably arranged in the second slide grooves, and are threadedly connected to the second screw rod.

[0010] Preferably, the third transmission member includes an inclined T-block, a movable block, a third screw, a second motor and a guide rod, and two of the movable block and the guide rod are provided. The guide rod and the third screw are rotatably connected to the mounting plate, the third screw is provided with two sections of threads with opposite rotation directions, and one end of the third screw is fixedly connected to the output shaft of the second motor, the movable block is slidably connected to the guide rod, and the movable block is threadedly connected to the third screw, four inclined T-blocks are provided, which are fixed to the movable block in groups of two, and the lower end of the support frame is provided with an interlocking block that cooperates with the inclined T-block.

[0011] Preferably, a fourth transmission component for driving the main shaft to rotate is provided on the first fixed seat, and the fourth transmission component includes a worm, a worm wheel and a third hand wheel. The worm wheel is fixed on the main shaft, and the worm is rotatably installed on the first fixed seat, and the worm and the worm wheel are meshed for transmission. The third hand wheel is fixed to one end of the worm extending out of the first fixed seat.

[0012] Preferably, a movable seal is provided at one end of the main shaft and the transmission shaft that are close to each other, and the movable seal includes a fixed block, a sealing block and a second spring. The fixed block is fixed to the main shaft or the transmission shaft by bolts, and a through hole is provided at the center of the fixed block. A groove for sliding the sealing block is provided on the main shaft and the transmission shaft. The sealing block is slidably arranged in the groove, and a push rod is provided at the center of the sealing block. The diameter of the push rod is smaller than the diameter of the through hole. The second spring sleeve is located on one side of the sealing block and applies a force to the push rod to protrude the end of the main shaft or the transmission shaft. A guide groove is provided on the outer edge of the sealing block, and the main shaft and the transmission shaft are fixedly connected by bolts.

[0013] Preferably, the transmission shaft is provided with a plurality of annular protrusions, and the polishing head comprises a plurality of inlaid grinding blocks spliced ​​into an annular structure, the inlaid grinding blocks are concave in structure, and two sides of the inlaid grinding blocks are fixedly connected to the annular protrusions by bolts.

[0014] Preferably, a support platform is provided on one side of the workbench, two cylinders are provided on the support platform, push blocks are provided on the pistons of the cylinders, and limit blocks in an L structure are detachably installed on opposite sides of the two support frames.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting a movable roller, a support roller, a first transmission member, a transmission shaft and a polishing head, the steel pipe is confined between the movable roller and the support roller, and one of the support rollers is driven to rotate by the first transmission member. The steel pipe is driven to rotate by relying on the friction between the support roller and the surface of the steel pipe, so that the polishing head can grind and polish the inner wall of the steel pipe, and the three-point support formed by the movable roller and the two support rollers makes the whole steel pipe stable and will not bend.

[0017] 2. By setting the transmission shaft, nozzle, main shaft, guide hole and movable seal, the external pipeline is rotatably connected to one end of the main shaft. The paint is pumped into the transmission shaft at a certain pressure and can be evenly sprayed from the nozzle, so that the inner wall of the steel pipe is evenly sprayed with paint. At the same time, the second transmission shaft and the nozzle move horizontally, so that the inner wall of the entire steel pipe can be sprayed with paint without secondary clamping, which effectively improves the processing efficiency of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the device for grinding and anti-rusting the inner wall of a steel pipe according to the present invention is shown in FIG. Figure 1 ;

[0019] Figure 2 The structure of the device for grinding and anti-rusting the inner wall of a steel pipe according to the present invention is shown in FIG. Figure 2 ;

[0020] Figure 3 An exploded view of the second fixing seat in the present invention;

[0021] Figure 4 It is a schematic structural diagram of the support frame, the mounting plate and the third transmission member in the present invention;

[0022] Figure 5 is a schematic structural diagram of the fourth transmission member in the present invention;

[0023] Figure 6 It is a partial structural schematic diagram of the main shaft, transmission shaft and movable seal in the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of the transmission shaft and the polishing head in the present invention;

[0025] Figure 8 It is a schematic diagram of the partial structure of the transmission shaft, polishing head and nozzle in the present invention.

[0026] Figure numerals: 1, movable roller; 2, transmission shaft; 3, main shaft; 4, first fixed seat; 5, first hand wheel; 6, first screw; 7, workbench; 8, fourth transmission member; 9, mounting plate; 10, support roller; 11, third transmission member; 12, second fixed seat; 13, support frame; 14, adjustment member; 15, first slider; 16, first slide groove; 17, connecting rod; 18, first spring; 19, nut; 20, limit block; 21, second transmission member; 22, cylinder; 23, push block; 24, support table; 25, first motor; 26, driving gear; 27, driven gear; 28, sliding seat; 29, the first Second slide groove; 30, second hand wheel; 31, pressure block; 32, second slider; 33, groove; 34, second screw; 35, first transmission member; 36, second motor; 37, movable block; 38, guide rod; 39, third screw; 40, inclined T block; 41, interlocking block; 42, third hand wheel; 43, worm; 44, push rod; 45, fixed block; 46, through hole; 47, sealing block; 48, guide groove; 49, second spring; 50, worm wheel; 51, guide hole; 52, sink groove; 53, positioning boss; 54, polishing head; 55, movable seal; 56, nozzle; 57, inlaid grinding block; 58, annular convex. DETAILED DESCRIPTION

[0027] 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.

[0028] like Figure 1-Figure 8As shown, a device for grinding and anti-rusting the inner wall of a steel pipe and spraying paint, comprises a workbench 7 and a polishing mechanism, two support frames 13 are arranged on the workbench 7, a movable roller 1 and two support rollers 10 are rotatably arranged between the two support frames 13, the two support rollers 10 are located below the movable roller 1, and the three are distributed in an isosceles triangle, an adjusting member 14 for adjusting the relative position of the movable roller 1 is arranged on the support frame 13, and a first transmission member 35 for driving one of the support rollers 10 to rotate is also arranged on the support frame 13, the polishing mechanism comprises a transmission shaft 2, a polishing head 54, a first fixed seat 4 and a second fixed seat 12, the transmission shaft 2 is arranged parallel to the support roller 10, and the two ends of the transmission shaft 2 are respectively connected to the first fixed seat 4 and the second fixed seat 12, a plurality of polishing heads 54 are arranged, They are respectively installed on the transmission shaft 2 at equal intervals, a main shaft 3 is rotatably arranged on the first fixed seat 4, one end of the transmission shaft 2 is connected to the main shaft 3, and the other end is connected to the second fixed seat 12, the first fixed seat 4 and the second fixed seat 12 are both slidably arranged with the workbench 7, and the sliding of the two is parallel to the axial direction of the transmission shaft 2, guide holes 51 are arranged in the main shaft 3 and the transmission shaft 2, and a nozzle 56 is arranged between two adjacent polishing heads 54 corresponding to the transmission shaft 2, the nozzle 56 is connected with the guide hole 51, and a one-way valve is arranged in the nozzle 56, a second transmission member 21 for driving the first fixed seat 4 to slide horizontally is arranged on the workbench 7, and a mounting plate 9 is arranged below the workbench 7, and a third transmission member 11 for driving the support frame 13 to rise and fall vertically is arranged on the mounting plate 9.

[0029] like Figure 1 and Figure 2 As shown, two adjusting members 14 are provided, and they are installed at both ends of the movable roller 1. The adjusting member 14 includes a first slider 15, a first spring 18, a connecting rod 17 and a nut 19. The first slider 15 is a cross-shaped structure. The support frame 13 is provided with a first slide groove 16 that cooperates with the first slider 15. One end of the connecting rod 17 is fixedly connected to the first slider 15, and the other end passes through the support frame 13 and is threadedly connected to the nut 19. The first spring 18 is sleeved on the outside of the connecting rod 17 and applies a downward force to the first slider 15. One end of the movable roller 1 is rotatably connected to the first slider 15. The length of the connecting rod 17 extending out of the support frame 13 is changed by rotating the nut 19, thereby changing the position of the first slider 15, and then adjusting the relative position of the movable roller 1 and the two support rollers 10. When the movable roller 1 is at the highest point, the steel pipe can be placed from one side of the support frame 13 onto the two support rollers 10, and then the movable roller 1 is adjusted to the lowest point. The force applied by the first spring 18 to the first slider 15 causes the movable roller 1 to press the steel pipe onto the two support rollers 10, so that the entire steel pipe is subjected to a certain clamping force, but is not completely clamped, so that the steel pipe is in a relatively fixed state.

[0030] like Figure 2 and Figure 4As shown, the first transmission member 35 includes a first motor 25, a driving gear 26 and a driven gear 27. The first motor 25 is fixed on the support frame 13, the driving gear 26 is fixed on the output shaft of the first motor 25, and the driven gear 27 is fixed on one end of the support roller 10 and meshes with the driving gear 26 for transmission. The first motor 25 drives the driving gear 26 to rotate, so that the driven gear 27 can drive one of the support rollers 10 to rotate. The support roller 10 can drive the steel pipe to rotate by friction. When the grinding head remains stationary, the grinding head contacts the inner wall of the steel pipe, so that the steel pipe can be ground and polished.

[0031] like Figure 1 and Figure 2 As shown, the second transmission member 21 includes a first screw 6 and a first hand wheel 5. The first screw 6 is rotatably connected to the workbench 7. The first hand wheel 5 is fixed at the end of the first screw 6. The first fixed seat 4 is threadedly connected to the first screw 6. By rotating the first hand wheel 5, the first screw 6 drives the first fixed seat 4 to slide horizontally, so that the main shaft 3 can drive the transmission shaft 2 and the second fixed seat 12 to move horizontally, thereby changing the position of the polishing head 54, and polishing different positions of the inner wall of the steel pipe can be performed. In this way, the processing range of the polishing head 54 can cover the entire inner wall of the steel pipe, and there will be no processing dead angles.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 7 As shown, the second fixed seat 12 includes a sliding seat 28, a second screw rod 34, a second slider 32 and a pressure block 31. The sliding seat 28 is slidably arranged with the workbench 7. Two second sliders 32 and two pressure blocks 31 are provided. The sliding seat 28 is provided with a second slide groove 29. The pressure block 31 is in a T-shaped structure and is fixed to the sliding seat 28 by bolts. Both ends of the second screw rod 34 are rotatably connected with the pressure block 31, and one end of the second screw rod 34 is also provided with a second hand wheel 30. A positioning boss 53 is provided on the transmission shaft 2, and a groove 33 matched with the positioning boss 53 is provided on the two second sliders 32. The second screw 34 is provided with two sections of threads with opposite rotation directions. The second slide grooves 29 of the two second sliders 32 are provided with a second hand wheel 30. 9 is slidingly arranged and is threadedly connected with the second screw rod 34. By rotating the second hand wheel 30, the second screw rod 34 drives the two second sliders 32 to slide along the second slide groove 29. When one end of the transmission shaft 2 is fixed on the main shaft 3, the two second sliders 32 are close to each other, and rely on the cooperation between the groove 33 and the positioning boss 53 to position the other end of the transmission shaft 2. When the polishing head 54 polishes the inner wall of the steel pipe, the force on the transmission shaft 2 is more stable. When the second screw rod 34 drives the two second sliders 32 to move away from each other, the transmission shaft 2 can be removed from the end away from the main shaft 3, so that the transmission shaft 2 can be taken out from the steel pipe, thereby facilitating the unloading of the processed steel pipe.

[0033] like Figure 1 and Figure 4 As shown, the third transmission member 11 includes an inclined T block 40, a movable block 37, a third screw 39, a second motor 36 and a guide rod 38. The movable block 37 and the guide rod 38 are both provided with two, the guide rod 38 and the third screw 39 are rotatably connected to the mounting plate 9, the third screw 39 is provided with two sections of threads with opposite rotation directions, and one end of the third screw 39 is fixedly connected to the output shaft of the second motor 36, the movable block 37 is slidably connected to the guide rod 38, and the movable block 37 is threadedly connected to the third screw 39, and the inclined T block 40 is provided with four The two supporting frames 13 are fixed on the movable block 37 in groups of two. The lower end of the supporting frame 13 is provided with an engaging block 41 cooperating with the inclined T block 40. When the second motor 36 drives the third screw rod 39 to rotate, the two movable blocks 37 are moved closer to or away from each other along the guide rod 38, and the inclined T block 40 moves synchronously with the movable block 37. The coordinated sliding of the inclined T block 40 and the engaging block 41 can drive the two supporting frames 13 to rise or fall synchronously, and keep the steel pipes in synchronous movement, so as to smoothly grind and polish the steel pipes and unload them.

[0034] like Figure 1 and Figure 5 As shown, a fourth transmission member 8 for driving the main shaft 3 to rotate is provided on the first fixed seat 4, and the fourth transmission member 8 includes a worm 43, a worm wheel 50 and a third hand wheel 42. The worm wheel 50 is fixed on the main shaft 3, and the worm 43 is rotatably installed on the first fixed seat 4, and the worm 43 and the worm wheel 50 are meshed for transmission. The third hand wheel 42 is fixed to an end of the worm 43 extending out of the first fixed seat 4. By rotating the third hand wheel 42, the worm 43 drives the worm wheel 50 and the main shaft 3 to rotate, and the main shaft 3 can drive the transmission shaft 2 and the polishing head 54 to rotate synchronously. After the polishing head 54 is worn at a local position, the remaining circumferential surface can be used to grind and polish the inner wall of the steel pipe.

[0035] like Figure 5-Figure 6As shown, the ends of the main shaft 3 and the transmission shaft 2 close to each other are both provided with a movable seal 55, and the movable seal 55 includes a fixed block 45, a sealing block 47 and a second spring 49. The fixed block 45 is fixed to the main shaft 3 or the transmission shaft 2 by bolts, and a through hole 46 is provided at the center of the fixed block 45. A sink groove 52 for the sealing block 47 to slide is provided on the main shaft 3 and the transmission shaft 2. The sealing block 47 is slidably provided in the sink groove 52, and a push rod 44 is provided at the center of the sealing block 47. The diameter of the push rod 44 is smaller than the diameter of the through hole 46. The second spring 49 is sleeved on one side of the sealing block 47 and exerts a force on the push rod 44 to protrude the end of the main shaft 3 or the transmission shaft 2. The outer edge of the sealing block 47 is provided with a guide groove 48. The shaft 2 is fixedly connected by bolts. When the main shaft 3 is separated from the transmission shaft 2, the elastic force exerted by the second spring 49 on the sealing block 47 keeps the sealing block 47 and the fixed block 45 in a state of being pressed against each other. At this time, the guide hole 51 and the through hole 46 are in a blocked state, so that the liquid paint in the guide hole 51 cannot flow out through the through hole 46. When the transmission shaft 2 is disassembled, the paint will not contaminate the workbench 7, and the waste of paint is also reduced. When assembling and connecting the main shaft 3 and the transmission shaft 2, the top rods 44 on the two movable seals 55 conflict with each other, so that the sealing block 47 compresses the second spring 49 and slides in the sink 52. In this way, the paint in the guide hole 51 can enter the transmission shaft 2 through the guide groove 48, thereby preparing for painting.

[0036] like Figure 8 As shown, a plurality of annular protrusions 58 are arranged on the transmission shaft 2, and the polishing head 54 includes a plurality of inlaid grinding blocks 57 spliced ​​into an annular structure, the inlaid grinding blocks 57 are concave in structure, and the two sides of the inlaid grinding blocks 57 are fixedly connected to the annular protrusions 58 by bolts. By providing the inlaid grinding blocks 57 that can be assembled and disassembled, the inlaid modules that have failed in use can be partially replaced, and the overall disassembly and assembly are simple and easy to operate.

[0037] like Figure 2 As shown, a support platform 24 is provided on one side of the workbench 7, and two cylinders 22 are provided on the support platform 24. A push block 23 is provided on the piston of the cylinder 22. After the processing of the steel pipe is completed, the movable roller 1 is first adjusted to the highest point, and then the two cylinders 22 are used to drive the push block 23 to move horizontally, so that the push block 23 pushes the steel pipe from the two support rollers 10 to one side, thereby facilitating the unloading of the steel pipe. A limit block 20 in an L structure is detachably installed on the opposite side of the two support frames 13. The two limit blocks 20 can locate the left and right positions of the steel pipe, so that the steel pipe will not move left and right due to force during grinding and polishing.

[0038] Working principle: first adjust the movable roller 1 to the highest point, then hoist the steel pipe onto the two support rollers 10, and then let the movable roller 1 press the steel pipe. The movable roller 1 and the two support rollers 10 form a three-point support for the steel pipe, and will not completely clamp the steel pipe. Then rely on the third transmission member 11 to drive the two support frames 13 to descend, and install the two ends of the transmission shaft 2 on the first fixed seat 4 and the second fixed seat 12. At this time, the polishing head 54 will not conflict with the inner wall of the steel pipe. Then the first transmission member 35 drives one of the support rollers 10 to rotate, and the support roller 10 drives the steel pipe to rotate by friction, and then the third transmission member 11 drives the support frame 1 3 rises until the inner wall of the steel pipe contacts the polishing head 54, so that the polishing head 54 can polish the inner wall of the steel pipe. After the polishing of the steel pipe at one position is completed, the second transmission member 21 is used to drive the transmission shaft 2 and the polishing head 54 to move horizontally for a certain distance, and the remaining positions of the inner wall of the steel pipe can be polished, so that the inner wall of the steel pipe can achieve the effect of full polishing. Then, the spray head 56 is used to spray paint on the inner wall of the steel pipe. When the second transmission member 21 drives the spray head 56 to move horizontally, the range of paint spraying can cover the entire inner wall of the steel pipe, and the processing of the steel pipe can be completed without secondary clamping.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for grinding and anti-rusting the inner wall of a steel pipe, comprising a workbench (7) and a polishing mechanism, characterized in that: Two support frames (13) are arranged on the workbench (7), and a movable roller (1) and two support rollers (10) are rotatably arranged between the two support frames (13). The two support rollers (10) are located below the movable roller (1), and the three support rollers (10) are arranged in an isosceles triangle. The support frame (13) is provided with an adjusting member (14) for adjusting the relative position of the movable roller (1), and the support frame (13) is also provided with a first transmission member (35) for driving one of the support rollers (10) to rotate. The polishing mechanism comprises a transmission shaft (2), a polishing head (54), a first fixed seat (4), and a second fixed seat (12). The transmission shaft (2) is arranged parallel to the support rollers (10), and the two ends of the transmission shaft (2) are respectively connected to the first fixed seat (4). The fixed seat (4) is connected to the second fixed seat (12), a plurality of polishing heads (54) are provided and are respectively installed on the transmission shaft (2) at equal intervals, a main shaft (3) is rotatably provided on the first fixed seat (4), one end of the transmission shaft (2) is connected to the main shaft (3), and the other end is connected to the second fixed seat (12), the first fixed seat (4) and the second fixed seat (12) are both slidably provided with a workbench (7), and the sliding of the two is parallel to the axial direction of the transmission shaft (2), a guide hole (51) is provided in the main shaft (3) and the transmission shaft (2), and a nozzle (56) is provided between two adjacent polishing heads (54) of the transmission shaft (2), the nozzle (56) is connected to the guide hole (51), and the nozzle ( 56), a one-way valve is arranged in the workbench (7), a second transmission member (21) for driving the first fixed seat (4) to slide horizontally is arranged on the workbench (7), and a mounting plate (9) is arranged below the workbench (7), and a third transmission member (11) for driving the support frame (13) to lift vertically is arranged on the mounting plate (9), the second fixed seat (12) comprises a sliding seat (28), a second screw rod (34), a second slider (32) and a pressing block (31), the sliding seat (28) is slidably arranged with the workbench (7), two second sliders (32) and two pressing blocks (31) are arranged, the sliding seat (28) is provided with a second slide groove (29), and the pressing block (31) is in a T-shaped structure and is fixed to the sliding seat (28) by bolts. 28), both ends of the second screw rod (34) are rotatably connected to the pressure block (31), and one end of the second screw rod (34) is also provided with a second hand wheel (30), the transmission shaft (2) is provided with a positioning boss (53), the two second sliders (32) are provided with a groove (33) that cooperates with the positioning boss (53), the second screw rod (34) is provided with two sections of threads with opposite rotation directions, the two second sliders (32) are slidably arranged with the second slide groove (29), and are threadedly connected with the second screw rod (34), and the ends of the main shaft (3) and the transmission shaft (2) that are close to each other are both provided with a movable seal (55), and the movable seal (55) includes a fixed block (45), a sealing block (47) and a second spring (49),The fixing block (45) is fixed to the main shaft (3) or the transmission shaft (2) by means of bolts, and a through hole (46) is provided at the center of the fixing block (45). A recessed groove (52) for sliding of a sealing block (47) is provided on the main shaft (3) and the transmission shaft (2). The sealing block (47) is slidably provided in the recessed groove (52), and a push rod (44) is provided at the center of the sealing block (47). The diameter of the push rod (44) is smaller than the diameter of the through hole (46). The second spring (49) sleeve is located on one side of the sealing block (47) and exerts a force on the push rod (44) to protrude from the end of the main shaft (3) or the transmission shaft (2). A guide groove (48) is provided at the outer edge of the sealing block (47). The main shaft (3) and the transmission shaft (2) are fixedly connected by means of bolts.

2. The device for grinding and anti-rusting the inner wall of a steel pipe according to claim 1 is characterized in that: Two adjusting members (14) are provided and are mounted at both ends of the movable roller (1). The adjusting member (14) comprises a first slider (15), a first spring (18), a connecting rod (17) and a nut (19). The first slider (15) is in a cross-shaped structure. The support frame (13) is provided with a first slide groove (16) that cooperates with the first slider (15). One end of the connecting rod (17) is fixedly connected to the first slider (15), and the other end passes through the support frame (13) and is threadedly connected to the nut (19). The first spring (18) is sleeved on the outside of the connecting rod (17) and applies a downward force to the first slider (15). One end of the movable roller (1) is rotatably connected to the first slider (15).

3. The device for grinding and anti-rusting the inner wall of a steel pipe according to claim 1, characterized in that: The first transmission member (35) comprises a first motor (25), a driving gear (26) and a driven gear (27); the first motor (25) is fixed on the support frame (13); the driving gear (26) is fixed on the output shaft of the first motor (25); and the driven gear (27) is fixed on one end of the support roller (10) and meshes with the driving gear (26) for transmission.

4. The device for grinding and anti-rusting the inner wall of a steel pipe according to claim 1, characterized in that: The second transmission member (21) comprises a first screw rod (6) and a first hand wheel (5), the first screw rod (6) being rotatably connected to the workbench (7), the first hand wheel (5) being fixed to an end of the first screw rod (6), and the first fixing seat (4) being threadedly connected to the first screw rod (6).

5. The device for grinding and anti-rusting the inner wall of a steel pipe according to claim 1, characterized in that: The third transmission member (11) comprises an inclined T block (40), a movable block (37), a third screw rod (39), a second motor (36) and a guide rod (38). The movable block (37) and the guide rod (38) are both provided with two. The guide rod (38) and the third screw rod (39) are rotatably connected to the mounting plate (9). The third screw rod (39) is provided with two sections of threads with opposite rotation directions. One end of the third screw rod (39) is fixedly connected to the output shaft of the second motor (36). The movable block (37) is slidably connected to the guide rod (38), and the movable block (37) is threadedly connected to the third screw rod (39). Four inclined T blocks (40) are provided, which are fixed to the movable block (37) in groups of two. The lower end of the support frame (13) is provided with a fitting block (41) that cooperates with the inclined T block (40).

6. The device for grinding and anti-rusting the inner wall of a steel pipe according to claim 1, characterized in that: A fourth transmission member (8) for driving the main shaft (3) to rotate is arranged on the first fixed seat (4), the fourth transmission member (8) comprising a worm (43), a worm wheel (50) and a third hand wheel (42), the worm wheel (50) being fixed on the main shaft (3), the worm (43) being rotatably mounted on the first fixed seat (4), and the worm (43) and the worm wheel (50) being meshed for transmission, and the third hand wheel (42) being fixed to an end of the worm (43) extending out of the first fixed seat (4).

7. The device for grinding and anti-rusting the inner wall of a steel pipe according to claim 1, characterized in that: The transmission shaft (2) is provided with a plurality of annular protrusions (58), and the polishing head (54) comprises a plurality of inlaid grinding blocks (57) spliced ​​into an annular structure, the inlaid grinding blocks (57) are in a concave structure, and two sides of the inlaid grinding blocks (57) are fixedly connected to the annular protrusions (58) by bolts.

8. The device for grinding and anti-rusting the inner wall of a steel pipe according to claim 1, characterized in that: A support platform (24) is provided on one side of the workbench (7), two cylinders (22) are provided on the support platform (24), a push block (23) is provided on the piston of the cylinder (22), and a limit block (20) in an L structure is detachably mounted on the opposite side of the two support frames (13).

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