Hollow steel conveying and grinding device and method

Abstract

The invention provides a hollow steel conveying and grinding device and method, and belongs to the technical field of steel pipe grinding, the hollow steel conveying and grinding device comprises a machine table and further comprises three conveying units which are evenly distributed on the machine table, each conveying unit comprises a fixing plate located in the machine table, a fixing frame is installed on each fixing plate, and the conveying units are arranged on the machine table; three first rolling wheels are rotationally arranged on the fixing frame, the three first rolling wheels are distributed in an inverted triangle shape, and a first grinding belt is sequentially connected to the three first rolling wheels in a lap joint mode; before polishing, the two polishing units are driven by the lifting plate to ascend and descend, the polishing size can be rapidly adjusted, the polishing units can be matched with steel pipes of different sizes, and through inclined arrangement of the polishing units and the conveying unit, the effect of conveying the steel pipes can be achieved while the steel pipes are polished.

Description

Technical Field

[0001] This invention belongs to the field of steel pipe grinding technology, specifically relating to a hollow steel conveying and grinding device and method. Background Technology

[0002] Steel pipe is a hollow cylindrical steel material. It has a hollow cross-section, and its length is much greater than its diameter or circumference. According to the cross-sectional shape, it is divided into round, square, rectangular, and special-shaped steel pipes; according to the material, it is divided into carbon structural steel pipes, low-alloy structural steel pipes, alloy steel pipes, and composite steel pipes; according to the application, it is divided into pipes for transportation pipelines, engineering structures, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, and high-pressure equipment; according to the manufacturing process, it is divided into seamless steel pipes and welded steel pipes. Seamless steel pipes are further divided into hot-rolled and cold-rolled (drawn) types, and welded steel pipes are further divided into straight seam welded steel pipes and spiral seam welded steel pipes.

[0003] Improper storage of steel pipes can cause them to rust. Similarly, when old steel pipes are recycled, they will also have a lot of rust on their surface. Therefore, it is necessary to remove the rust from the surface of the steel pipes before use to facilitate their use.

[0004] Chinese patent CN116141129B discloses a spiral steel pipe weld grinding machine, including a grinding frame with multiple conveyor frames and multiple adjustable feeding wheel assemblies. The conveyor frames also include a tensioning control assembly that synchronously adjusts the multiple adjustable feeding wheel assemblies. This machine can adapt to grinding spiral steel pipes of different thicknesses and can feed steel pipes of different sizes during grinding, exhibiting strong adaptability. The synchronous adjustment of the conveyor wheel assemblies ensures that the conveyor wheels adhere to the outer surface of steel pipes of different diameters within a specified range. Furthermore, the grinding wheels can open and close radially to accommodate spiral steel pipes of different sizes, resulting in higher grinding efficiency, better grinding effect, and more comprehensive grinding of the weld surface.

[0005] The grinding structure and conveying structure in the above technical solution are two independent structures. When changing steel pipes of different specifications, the axis of the steel pipe needs to be aligned with the axis of the grinding structure. The grinding structure is evenly stressed on the surface of the steel pipe, so that the grinding structure can grind the steel pipe evenly. However, the above technical solution does not have the technical feature to align the axis of the steel pipe, which makes it take a long time to adjust the steel pipe when grinding steel pipes of different diameters, affecting work efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide a hollow steel conveying and grinding device and method, which aims to solve the problem that in the prior art, when grinding steel pipes of different sizes, it is necessary to spend a long time adjusting the steel pipes, thus affecting work efficiency.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a hollow steel conveying and grinding device and method, comprising: a machine base, and further comprising: The conveying unit is provided in three parts, which are evenly distributed on the machine platform. The conveying unit includes a fixed plate located inside the machine platform. A fixed frame is installed on the fixed plate. Three first rollers are rotatably installed on the fixed frame. The three first rollers are distributed in an inverted triangle. A first grinding belt is sequentially attached to the three first rollers. The first grinding belt can move relative to the fixed frame. The grinding unit is interspersed among the three conveying units. The grinding unit includes a lifting plate that slides up and down inside the machine. The lifting plate is equipped with a mounting frame that is inclined. Second rollers are rotatably mounted at both ends of the mounting frame, and second grinding belts are mounted on the second rollers. The grinding units are arranged in pairs, with each pair of grinding units mirroring each other and staggered to the left and right. The two grinding units are arranged in a cross shape, with the intersection point located at the top of the grinding units. The steel pipe can be inserted under the two grinding units.

[0008] A further technical solution of the present invention is that the bottom of the fixed frame is provided with a first rotating rod that can rotate on the fixed plate, the lifting plate is provided with a first gear, the first rotating rod passes through the lifting plate and the first gear, and the first rotating rod can drive the first gear to rotate. The lifting plate is provided with a reversing gear that meshes with the first gear and a rack that meshes with the reversing gear.

[0009] A further technical solution of the present invention is that racks are meshed on both sides of the reversing gear, and second gears are meshed on both racks. A second rotating rod is provided on the rotation axis of the second gear. One end of the second rotating rod is connected to the mounting frame, and the axis of the second rotating rod is perpendicular to the mounting frame. A fixing member for fixing the second rotating rod is provided on the lifting plate.

[0010] A further technical solution of the present invention is that a support plate is provided on the machine base, the bottom of the support plate abuts against the top of the fixed frame, and the top of the support plate abuts against the inner ring of the first grinding belt, for supporting the steel pipe.

[0011] A further technical solution of the present invention includes a grinding unit for grinding the corners of the steel pipe ends. The grinding unit includes a mounting groove on a support plate, a sliding member that slides up and down in the mounting groove and extends to the bottom of the support plate. An inclined plate is rotatably mounted on one end of the sliding member in the mounting groove. The axis of rotation of the sliding member and the inclined plate is located in the middle of the inclined plate, and the axis of rotation of the inclined plate is higher than the upper surface of the support plate. When the inclined plate is tilted, the bottom side is lower than the upper surface of the support plate. A first grinding belt overlaps on the upper surface of the inclined plate. A first elastic member is provided on the support plate to push the sliding member closer to the steel pipe. A second elastic member is provided on the inclined plate to tilt the inclined plate toward the feed end of the equipment. The elasticity of the first elastic member is greater than that of the second elastic member. Limiting blocks are provided on both sides of the mounting groove to limit the tilt angle of the inclined plate.

[0012] A further technical solution of the present invention is that the two sides of the second grinding belt and the first grinding belt are arc-shaped, the corners of the first roller and the second roller are rounded, and the grinding belt is wrapped around the rounded corners. When the steel pipe is fed forward, the corners of the steel pipe can contact the rounded corners of the grinding belt.

[0013] A further technical solution of the present invention is that the two second grinding belts extend from the feed end to the discharge end of the steel pipe, with the grinding mesh number gradually increasing, and the grinding mesh number of the first grinding belt located between the two second grinding belts is between the grinding mesh numbers of the two second grinding belts.

[0014] A grinding method for hollow steel conveyors includes the following steps: S1. Start the equipment; the conveying unit and grinding unit will begin operation. S2. Slowly push the steel pipe into the machine, so that the steel pipe passes through the first conveying unit and the first grinding unit; S3. Through this conveying unit and grinding unit, and with the help of manual labor, the steel pipe can be driven to be conveyed into the equipment, and at the same time the grinding unit can grind the steel pipe. S4. When it is necessary to replace steel pipes of different sizes, the height of the conveying unit remains unchanged. Adjust the height of the lifting plate to adjust the height of the grinding unit so that the second grinding belt can contact the outer surface of the steel pipe and there is a certain pressure between the second grinding belt and the steel pipe to meet the grinding requirements of the steel pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. Before grinding, the two grinding units are raised and lowered by the lifting plate, which can quickly adjust the grinding size so that the grinding unit can be adapted to steel pipes of different sizes.

[0016] 2. By tilting the grinding unit and the conveying unit, the steel pipe can be ground and conveyed at the same time.

[0017] 3. By setting up an edge grinding unit, the edges and corners of the steel pipe can be ground to avoid burrs from accidentally injuring workers. In addition, the edge grinding device can grind the edges and corners of the steel pipe into a rounded shape, making the steel pipe more scratch-resistant. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a specific embodiment of the present invention; Figure 3 This is an isometric sectional view of a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the conveying unit in a specific embodiment of the present invention; Figure 5 for Figure 3 Enlarged structural diagram at point A; Figure 6 This is a schematic diagram of the grinding unit in a specific embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the second embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the conveying unit and the grinding unit after angle adjustment in this invention.

[0019] In the diagram: 1. Machine base; 11. Fixed plate; 12. Lifting plate; 13. Second drive device; 2. Conveying unit; 21. Fixed frame; 211. First rotating rod; 212. First gear; 213. Reversing gear; 214. Rack; 22. First roller; 23. First grinding belt; 24. First drive device; 3. Grinding unit; 31. Mounting frame; 32. Second roller; 33. Second grinding belt; 34. Third drive device; 35. Second gear; 36. Second rotating rod; 37. Fixing component; 38. Fourth drive device; 4. Edge grinding unit; 41. Inclined plate; 42. Sliding component; 43. First elastic component; 44. Second elastic component; 45. Limiting block; 5. Support plate; 51. Mounting groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-8 The present invention provides the following technical solution: a hollow steel conveying and grinding device and method, comprising a machine base 1, a conveying unit 2, a grinding unit 3 and a grinding edge unit 4.

[0022] Machine 1 is placed on the ground. The steel pipe enters the equipment from the left side and exits from the right side. Conveying unit 2 is installed on machine 1 and is horizontally positioned so that the steel pipe can be placed above it. Conveying unit 2 can also drive the steel pipe to rotate while conveying it. Grinding unit 3 is installed on machine 1 and can be raised and lowered. When the steel pipe enters below grinding unit 3, grinding unit 3 moves downward so that it comes into contact with the steel pipe. Then, grinding unit 3 grinds the steel pipe. When the steel pipe enters the conveying unit 2 and grinding unit 3, the end of the steel pipe passes through edge grinding unit 4. Edge grinding unit 4 can grind the edge of the steel pipe end, removing burrs and avoiding the risk of scratches to workers.

[0023] Please see Figure 2 and Figure 3The conveying unit 2 has three units, evenly arranged in an array along the moving direction of the steel pipe. Each conveying unit 2 includes a fixed plate 11 located inside the machine base 1. The fixed plate 11 is horizontally positioned and fixed inside the machine base 1, or it can be fixed with screws to prevent vertical movement. A fixed frame 21 is mounted on the fixed plate 11, and three first rollers 22 are mounted on the fixed frame 21. The three first rollers 22 are arranged in an inverted triangle, with the axes of two of the first rollers 22 located on the same horizontal plane, and both of these first rollers 22 being higher than the fixed frame 21 and the upper surface of the machine base 1. The third first roller 22 is mounted below the fixed frame 21. A first drive device 24, which is a motor, is mounted on the fixed frame 21. A first grinding belt 23 is provided on the first roller 22, which is connected to the first roller 22. The first grinding belt 23 overlaps the three first rollers 22 in sequence and is tensioned. When the first drive device 24 is running, it can drive one of the first rollers 22 to rotate. As a result, the first grinding belt 23 is in a tensioned state and can rotate. When the first grinding belt 23 rotates, it can grind the steel pipe. In the multiple conveying units 2, the rotation speed of the first grinding belt 23 on the middle conveying unit 2 is faster than that on the two side conveying units 2. This creates a speed difference between the rotation speed of the first grinding belt 23 in the middle and the rotation speed of the steel pipe, so that the first grinding belt 23 in the middle can grind the surface of the steel pipe.

[0024] Please see Figures 2-4 A support plate 5 is provided on the machine base 1. The bottom of the support plate 5 abuts against the top of the fixed frame 21, and the top of the support plate 5 abuts against the inner ring of the first grinding belt 23. This allows the support plate 5 to support the steel pipe when it falls on the first grinding belt 23, preventing the grinding belt from deforming due to the weight of the steel pipe itself.

[0025] Please see Figure 4 and Figure 5The edge grinding unit 4 includes a mounting groove 51 formed on the support plate 5. A sliding member 42 is provided in the mounting groove 51, extending from the inside of the mounting groove 51 to the bottom of the support plate 5. The sliding member 42 is a column with a rectangular cross-section to prevent it from rotating on the support plate 5. An inclined plate 41 is rotatably mounted at one end of the sliding member 42 in the mounting groove 51. The axis of rotation of the sliding member 42 and the inclined plate 41 is located in the middle of the inclined plate 41, and the axis of rotation of the inclined plate 41 is higher than the upper surface of the support plate 5. When the inclined plate 41 is tilted, the bottom side of the inclined plate 41 is lower than the upper surface of the support plate 5. The first grinding belt 23 overlaps the upper surface of the inclined plate 41. A first elastic member 43, which is a compression spring, is provided on the support plate 5. One end of the elastic member 43 abuts against the inner bottom wall of the mounting groove 51, and the other end abuts against the sliding member 42, which can push the sliding member 42 closer to the steel pipe. A second elastic element 44 is provided on the side of the inclined plate 41 near the feed end of the steel pipe. The second elastic element 44 is a tension spring, one end of which is fixed to the inner bottom wall of the mounting groove 51, and the other end is fixed to the feed end of the inclined plate 41 near the equipment. This ensures that the upper surface of the inclined plate 41 is always tilted towards the feed end of the equipment when no force is applied, so that the end of the steel pipe can abut against the upper surface of the inclined plate 41 when the steel pipe is fed. The second elastic element 44 can also be replaced by a counterweight (not shown in the figure). The counterweight is installed on the side of the inclined plate 41 near the feed end of the equipment. The weight of the counterweight can also achieve the purpose of tilting the inclined plate 41 towards the feed end of the equipment. Limiting blocks 45 are mirrored on the left and right sides of the mounting groove 51. The limiting blocks 45 are located below the inclined plate 41. When the inclined plate 41 tilts to the sides, both sides of the inclined plate 41 can abut against the limiting blocks 45, which can limit the tilt angle of the inclined plate 41.

[0026] When the edge grinding unit 4 is in use, its initial state is as follows: under the action of the first elastic element 43 and the second elastic element 44, the inclined plate 41 is tilted, and the upper surface of the inclined plate 41 faces the feed end of the equipment. At this time, the steel pipe operator slowly pushes the steel pipe towards the conveying unit 2. Since the bottom of the inclined plate 41 is lower than the upper surface of the support plate 5, there is no interference between the steel pipe and the inclined plate 41 when the steel pipe is pushed. The edge of the steel pipe first contacts the first grinding belt 23 on the upper surface of the inclined plate 41. Through the operation of the first grinding belt 23 and the operator slowly rotating the steel pipe, the burrs at the corners of the steel pipe can be cleaned. Afterwards, when the steel pipe is completely pressed on the inclined plate 41, the inclined plate 41 will be pressed into the interior of the mounting groove 51. At this time, the sliding member 42 moves downward, and the first elastic member 43 is compressed. When the end of the steel pipe moves onto the inclined plate 41, and when the end of the steel pipe is located to the right of the sliding member 42, the first elastic member 43 will push the sliding member 42 upward and push the inclined plate 41 upward. Since the right side of the inclined plate 41 is fixed by the weight of the steel pipe, when the sliding member 42 moves upward, the left side of the inclined plate 41 moves upward. At this time, the second elastic member 44 is stretched. It should be noted that the elasticity of the first elastic member 43 is greater than that of the second elastic member 44. The inclined plate 41 tilts to the other side, so that the first grinding band 23 above the inclined plate 41 contacts the end of the steel pipe. At this time, when the steel pipe rotates, the burrs at the end of the steel pipe can be ground.

[0027] When grinding the edge of the steel pipe, the angle of inclination of the inclined plate 41 will gradually change, so the grinding angle of the edge of the steel pipe will also gradually change. This makes the grinding of the corner of the steel pipe not only an inclined plane, but a smooth arc surface. In other words, the grinding unit 4 can grind the corner of the steel pipe into a rounded corner, making the steel pipe more scratch-resistant. In addition, the rounded corner can disperse stress through a smooth transition, which significantly improves the structural reliability of the steel pipe.

[0028] Please see Figure 2 , Figure 3 and Figure 6 A lifting plate 12 is provided on the machine base 1. The lifting plate 12 can slide up and down on the machine base 1. The lifting plate 12 is located above the fixed plate 11. The grinding unit 3 is installed on the lifting plate 12, so that the lifting plate 12 can drive the grinding unit 3 to rise and fall. A second drive device 13 is provided on the machine base 1. The second drive device 13 is a hydraulic cylinder. The second drive device 13 is fixed inside the machine base 1. Its output end is connected to the lifting plate 12. The lifting plate 12 can be driven to rise and fall through the second drive device 13.

[0029] Please see Figure 6 and Figure 7The grinding unit 3 includes a mounting frame 31 mounted on the lifting plate 12. The mounting frame 31 is inclined and forms an acute angle with the lifting plate 12. Second rollers 32 are rotatably mounted at both ends of the mounting frame 31. A second grinding belt 33 is mounted on the second rollers 32. A third driving device 34, which is a motor, is also mounted on the mounting frame 31 to drive the second rollers 32 to rotate. The output end of the third driving device 34 is connected to one of the second rollers 32, causing the second roller 32 to rotate, thereby moving the second grinding belt 33. There are two grinding units 3, which are mirror images of each other and staggered to the left and right, so that the two grinding units 3 are arranged in a cross arrangement. The steel pipe can be inserted under the two grinding units 3 and moved downward by the lifting plate 12 so that the two grinding units 3 come into contact with the steel pipe, thereby grinding the surface of the steel pipe. The two mirror images of the grinding units 3 form a group. There are multiple groups of this grinding device evenly arranged in the direction of steel pipe movement and interspersed between each pair of adjacent conveying units 2.

[0030] In use, the height of the grinding unit 3 is first adjusted by the lifting plate 12 until the second grinding belt 33 contacts the surface of the steel pipe. Then, the steel pipe is conveyed by the first conveying unit 2 in cooperation with the staff. When the steel pipe enters below the first grinding unit 3, the surface of the steel pipe can be initially ground. During the grinding, a large amount of rust on the surface of the steel pipe can be removed. The second grinding belt 33 on the first grinding unit 3 is 50-70 grit sandpaper, which can quickly break through thick rust layers and stubborn oxide scale, avoiding repeated grinding that damages the substrate. When the steel pipe moves to the first grinding belt 23 located in the middle, the first grinding belt 23 is 90-120 grit for coarse grinding. Finally, just below the grinding unit 3 at the end, the second grinding belt 33 is 120 grit or higher sandpaper for fine grinding of the steel pipe. Finally, the edges of the steel pipe are ground again by the end conveying unit 2.

[0031] Please see Figure 2 , Figure 3 , Figure 6 and Figure 8A first rotating rod 211 is provided at the bottom of the fixed frame 21. The first rotating rod 211 passes downward through the lifting plate 12 and rotates on the fixed plate 11, allowing the first rotating rod 211 to rotate relative to the fixed plate 11 and simultaneously allowing the lifting plate 12 to move up and down along the first rotating rod 211. A first gear 212 is provided on the lifting plate 12, with the first rotating rod 211 passing through the axis of the first gear 212. The cross-section of the first rotating rod 211 is rectangular, allowing the first gear 212 to drive the first rotating rod 211 to rotate when it rotates. A reversing gear 213 meshes on one side of the first gear 212. The reversing gear 213 is rotatably mounted on the lifting plate 12. Two racks 214 mesh on both sides of the reversing gear 213. The racks 214 are mounted on the lifting plate 12 and can slide left and right along the direction of movement of the steel pipe. A second gear 35 meshes on rack 214. A second rotating rod 36 is arranged on the rotation axis of the second gear 35. The end of the second rotating rod 36 away from the second gear 35 is connected to the mounting frame 31, and the axis of the second rotating rod 36 is perpendicular to the mounting frame 31, so that the second rotating rod 36 can drive one end of the mounting frame 31 to swing when it rotates. A fixing member 37 is fixedly connected to the lifting plate 12. The fixing member 37 is detachably connected to the lifting plate 12 by screws. A sleeve is provided on the lifting plate 12, so that the second rotating rod 36 is rotatably disposed inside the sleeve for fixing the second rotating rod 36, so that the second rotating rod 36 can only rotate on its own axis, while preventing the second rotating rod 36 from being displaced. A fourth driving device 38 is provided on the lifting plate 12. The fourth driving device 38 is a hydraulic cylinder. The hydraulic cylinder is fixed on the lifting plate 12, and its telescopic end is connected to the rack 214.

[0032] Please see Figure 8In use, the shortening of the fourth drive device 38 can drive the rack 214 near the front end to slide to the left on the lifting plate 12. When the rack 214 slides, it can drive the reversing gear 213 to rotate clockwise, and at the same time, the second gear 35 near the front end rotates clockwise synchronously. The reversing gear 213 can drive the first gear 212 to rotate counterclockwise synchronously. When the first gear 212 rotates counterclockwise, it can drive the first rotating rod 211 and the fixed frame 21 to rotate counterclockwise, so that the first grinding belt 2 on the fixed frame 21... 3. Tilt at a certain angle, with the side closer to the front tilting to the right and the side closer to the rear tilting to the left. When the second gear 35 near the front rotates clockwise, it simultaneously causes the top of the mounting bracket 31 to swing to the right. Meanwhile, the rack 214 at the rear, driven by the reversing gear 213, slides to the right, causing the second gear 35 at the rear to rotate counterclockwise. This, in turn, causes the top of the mounting bracket 31 at the rear to swing to the left, thus causing the tops of the two mounting brackets 31 to move away from each other, and simultaneously causing the mounting bracket to... The second grinding belt 33 on the mounting bracket 31 is kept in an inclined state. The modular engagement between the first gear 212 and the second gear 35 ensures that the inclination angles of the first grinding belt 23 and the second grinding belt 33 remain consistent. When both the first grinding belt 23 and the second grinding belt 33 are in an inclined state and rotate, when the steel pipe is placed on the first grinding belt 23, due to the weight of the steel pipe itself, the friction between the steel pipe and the first grinding belt 23 is relatively large. Meanwhile, the left and right sides of the steel pipe are limited by the two second grinding belts 33. Therefore… When the first grinding belt 23 rotates, it can drive the steel pipe to rotate. Since the first grinding belt 23 is inclined, it exerts an axial conveying force on the steel pipe, so that the steel pipe can rotate while moving axially. By adjusting the inclination of the second grinding belt 33, it can not only grind the steel pipe, but also assist in driving the steel pipe to move in the axial direction. In addition, by adjusting the inclination angle of the first grinding belt 23 and the second grinding belt 33, the conveying speed of the steel pipe can be adjusted.

[0033] Please see Figure 7 Another embodiment provided by the edge grinding unit 4 differs from the first embodiment in that the two sides of the second grinding belt 33 or the first grinding belt 23 are arc-shaped, and its cross-section is bracket-shaped. The corners of the first roller 22 and the second roller 32 are rounded, so that the grinding belt covers the rounded corners. When the steel pipe is fed forward, the corners of the steel pipe first come into contact with the rounded corners of the grinding belt, so that the corners of the steel pipe can be ground. Then, it smoothly transitions from the rounded corners to the grinding surface of the grinding belt, so that the steel pipe can be ground. This embodiment is simpler in structure than the first embodiment and is easier to maintain.

[0034] A grinding method for hollow steel conveyors includes the following steps: S1. Start the equipment; conveying unit 2 and grinding unit 3 will begin operation. S2. Slowly push the steel pipe into the interior of the machine 1, so that the steel pipe passes through the first conveying unit 2 and the first grinding unit 3; S3. Through the conveying unit 2 and the grinding unit 3, and with the help of manual labor, the steel pipe can be driven to be conveyed into the equipment, and at the same time the grinding unit 3 can grind the steel pipe. S4. When it is necessary to replace steel pipes of different sizes, the height of the conveying unit 2 remains unchanged, and the height of the lifting plate 12 is adjusted so that the height of the grinding unit 3 is adjusted so that the second grinding 33 can contact the outer surface of the steel pipe and there is a certain pressure between the second grinding belt 33 and the steel pipe to meet the grinding requirements of the steel pipe.

Claims

1. A hollow steel conveying and grinding device, comprising: The machine (1) is characterized in that it further includes: The conveying unit (2) has three units, which are evenly distributed on the machine base (1). The conveying unit (2) includes a fixed plate (11) located inside the machine base (1). A fixed frame (21) is installed on the fixed plate (11). Three first rollers (22) are rotatably arranged on the fixed frame (21). The three first rollers (22) are arranged in an inverted triangle. A first grinding belt (23) is sequentially attached to the three first rollers (22). The first grinding belt (23) can move relative to the fixed frame (21). The grinding unit (3) is interspersed among the three conveying units (2). The grinding unit (3) includes a lifting plate (12) that slides up and down inside the machine base (1). A mounting frame (31) is provided on the lifting plate (12). The mounting frame (31) is inclined. Second rollers (32) are rotatably provided at both ends of the mounting frame (31). A second grinding belt (33) is provided on the second rollers (32). The grinding units (3) are arranged in pairs, and each pair of grinding units (3) is mirrored and staggered to the left and right. The two grinding units (3) are arranged in a cross shape, with the intersection point located at the top of the grinding unit (3). The steel pipe can be inserted into the bottom of the two grinding units (3).

2. The hollow steel conveying and grinding device according to claim 1, characterized in that: The bottom of the fixed frame (21) is provided with a first rotating rod (211) that can rotate on the fixed plate (11). The lifting plate (12) is provided with a first gear (212). The first rotating rod (211) passes through the lifting plate (12) and the first gear (212), and the first rotating rod (211) can drive the first gear (212) to rotate. The lifting plate (12) is provided with a reversing gear (213) that meshes with the first gear (212) and a rack (214) that meshes with the reversing gear (213).

3. The hollow steel conveying and grinding device according to claim 2, characterized in that: Both sides of the reversing gear (213) are meshed with racks (214), and both racks (214) are meshed with second gears (35). A second rotating rod (36) is provided on the rotation axis of the second gear (35). One end of the second rotating rod (36) is connected to the mounting frame (31), and the axis of the second rotating rod (36) is perpendicular to the mounting frame (31). A fixing member (37) for fixing the second rotating rod (36) is provided on the lifting plate (12).

4. The hollow steel conveying and grinding device according to claim 1, characterized in that: The machine base (1) is provided with a support plate (5), the bottom of the support plate (5) abuts against the top of the fixed frame (21), and the top of the support plate (5) abuts against the inner ring of the first grinding belt (23) to support the steel pipe.

5. The hollow steel conveying and grinding device according to claim 4, characterized in that: It also includes a grinding unit (4) for grinding the edges and corners of the steel pipe ends. The grinding unit (4) includes a mounting groove (51) on the support plate (5). A sliding member (42) that slides up and down is provided in the mounting groove (51) and extends to the bottom of the support plate (5). An inclined plate (41) is rotatably mounted on one end of the sliding member (42) in the mounting groove (51). The axis of rotation of the sliding member (42) and the inclined plate (41) is located in the middle of the inclined plate (41), and the axis of rotation of the inclined plate (41) is higher than the upper surface of the support plate (5). (41) When tilted, the bottom side is lower than the upper surface of the support plate (5). The first grinding belt (23) overlaps on the upper surface of the inclined plate (41). The support plate (5) is provided with a first elastic element (43) that pushes the sliding element (42) close to the steel pipe. The inclined plate (41) is provided with a second elastic element (44) that tilts the inclined plate (41) toward the feed end of the equipment. The elasticity of the first elastic element (43) is greater than that of the second elastic element (44). The two sides of the mounting groove (51) are provided with limiting blocks (45) that limit the tilt angle of the inclined plate (41).

6. The hollow steel conveying and grinding device according to claim 1, characterized in that: The two sides of the second grinding belt (33) and the first grinding belt (23) are arc-shaped, and the corners of the first roller (22) and the second roller (32) are rounded. The grinding belt is wrapped around the rounded corners. When the steel pipe is fed forward, the corners of the steel pipe can contact the rounded corners of the grinding belt.

7. The hollow steel conveying and grinding device according to claim 1, characterized in that: The two second grinding belts (33) extend from the feed end of the steel pipe to the discharge end of the steel pipe, with the grinding mesh number gradually increasing. The grinding mesh number of the first grinding belt (23) located between the two second grinding belts (33) is between the grinding mesh numbers of the two second grinding belts (33).

8. A grinding method for hollow steel conveyors, characterized in that: The hollow steel conveying and grinding device as described in claim 1 includes the following steps: S1. Start the equipment, and the conveying unit (2) and the grinding unit (3) will start running; S2. Slowly push the steel pipe into the machine (1) so that the steel pipe passes through the first conveying unit (2) and the first grinding unit (3). S3. Through the conveying unit (2) and the grinding unit (3), and with the help of manual labor, the steel pipe can be driven to be conveyed into the equipment, and the grinding unit (3) can grind the steel pipe. S4. When it is necessary to replace steel pipes of different sizes, the height of the conveying unit (2) remains unchanged. Adjust the height of the lifting plate (12) to adjust the height of the grinding unit (3) so that the second grinding belt (33) can contact the outer surface of the steel pipe and there is a certain pressure between the second grinding belt (33) and the steel pipe to meet the grinding of the steel pipe.

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