Hollow steel conveying and grinding device and method

Abstract

The application provides a hollow steel conveying and polishing device and method, and belongs to the technical field of steel pipe polishing. The hollow steel conveying and polishing device comprises a machine table, and further comprises three conveying units which are uniformly distributed on the machine table. The conveying unit comprises a fixed plate located inside the machine table, a fixing frame is installed on the fixed plate, three first rollers are rotationally arranged on the fixing frame, the three first rollers are in inverted triangular distribution, and a first polishing belt is sequentially overlapped on the three first rollers. Before polishing, two polishing units are driven by a lifting plate to ascend and descend, so that the polishing size can be quickly adjusted, and the polishing unit can be adapted to steel pipes of different sizes. Through the inclined arrangement of the polishing unit and the conveying unit, the effect of conveying the steel pipe can be achieved while the steel pipe is being polished.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of steel pipe polishing, and particularly relates to a hollow steel conveying and polishing device and method. BACKGROUND

[0002] Steel pipe, a kind of 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 use, it is divided into pipes for conveying, engineering structures, hot work equipment, petroleum and chemical industry, machinery manufacturing, geological drilling, high pressure equipment, etc.; according to the production process, it is divided into seamless steel pipes and welded steel pipes, among which the seamless steel pipes are further divided into hot-rolled and cold-rolled (drawn) ones, and the welded steel pipes are further divided into straight seam welded steel pipes and spiral seam welded steel pipes.

[0003] When the steel pipe is stored, improper storage will cause rust on the surface of the steel pipe, and when the old steel pipe is recycled, there will also be a large amount of rust on the surface, so the rust on the surface of the steel pipe needs to be removed before use to facilitate the use of the steel pipe.

[0004] In the Chinese patent with the authorization announcement number CN116141129B, a spiral steel pipe weld polishing machine is disclosed, which comprises a polishing machine frame, a plurality of conveying frames are arranged on the polishing machine frame, a plurality of adjustable feeding wheel assemblies are arranged on the conveying frames, a closing and opening control assembly capable of controlling the synchronous adjustment of the plurality of adjustable feeding wheel assemblies is arranged on the conveying frames, which can adapt to different thicknesses of spiral steel pipes for polishing processing, and can realize the feeding of steel pipes of different sizes during the polishing process of the spiral steel pipe, has strong adaptability, the conveying wheel group can be synchronously adjusted to ensure that the conveying wheel is attached to the outer surface of the steel pipe with different diameters within the range, at the same time, the polishing wheel can be opened and closed along the radial direction to adapt to the polishing of spiral steel pipes of different sizes, the surface polishing efficiency of the weld is higher, the polishing effect is better, and the polishing is more comprehensive.

[0005] The polishing structure and the conveying structure of the above technical solution are two independent structures. When different specifications of steel pipes are replaced, the axis of the steel pipe needs to be aligned with the axis of the polishing structure, and the polishing structure is uniformly stressed on the surface of the steel pipe, so that the polishing structure can uniformly polish the steel pipe. However, the above technical solution does not have the technical feature of aligning the axis of the steel pipe, so that a long time is needed to adjust the steel pipe when polishing steel pipes of different diameters, which affects the work efficiency. SUMMARY

[0006] The hollow steel conveying and polishing device and method aim to solve the problem that a long time is needed to adjust the steel pipe when polishing the steel pipe of different sizes in the prior art, thereby affecting work efficiency.

[0007] To achieve the above object, the present application provides the following technical scheme: a hollow steel conveying and polishing device and method, comprising: a machine table, further comprising:

[0008] A conveying unit is provided with three, which are uniformly distributed on the machine table, and the conveying unit comprises a fixed plate located inside the machine table, a fixed frame is installed on the fixed plate, three first rollers are rotationally arranged on the fixed frame, the three first rollers are distributed in an inverted triangular shape, and a first polishing belt is sequentially overlapped on the three first rollers, and the first polishing belt can move relative to the fixed frame;

[0009] A polishing unit is interposed between the three conveying units, and the polishing unit comprises a lifting plate that slides up and down inside the machine table, an installation frame is arranged on the lifting plate, the installation frame is arranged in an inclined manner, second rollers are rotationally arranged at both ends of the installation frame, and a second polishing belt is arranged on the second rollers;

[0010] Each two polishing units form a group, and the polishing units in each group are mirror image arranged and left-right staggered with each other, and the two polishing units are arranged in a cross shape, and the intersection point is located at the top of the polishing unit, and the steel pipe can pass below the two polishing units.

[0011] Further technical solutions of the present application are that the bottom of the fixed frame is provided with a first rotating rod that can rotate on the fixed plate, a first gear is arranged on the lifting plate, the first rotating rod penetrates the lifting plate and the first gear, and the first rotating rod can drive the first gear to rotate, a reversing gear that meshes with the first gear is arranged on the lifting plate, and a rack that meshes with the reversing gear is arranged on the lifting plate.

[0012] Further technical solutions of the present application are that the two sides of the reversing gear are meshed with racks, second gears are meshed on the two racks, a second rotating rod is arranged on the rotation axis of the second gear, one end of the second rotating rod is connected with the installation frame, and the axis of the second rotating rod is perpendicular to the installation frame, and a fixing member for fixing the second rotating rod is arranged on the lifting plate.

[0013] Further technical solutions of the present application are that a support plate is arranged on the machine table, 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 polishing belt, so as to support the steel pipe.

[0014] Further technical solutions of the present application are also provided, which further comprise an edge grinding unit for grinding the corners of the end of the steel pipe, the edge grinding unit comprises a mounting groove opened on the support plate, a sliding member sliding up and down is arranged in the mounting groove and penetrates to the bottom of the support plate, a slope plate is rotatably arranged at one end of the sliding member in the mounting groove, the rotation axis of the sliding member and the slope plate is located in the middle of the slope plate, the rotation axis of the slope plate is higher than the upper surface of the support plate, the lowest side of the slope plate is lower than the upper surface of the support plate when the slope plate is inclined, a first grinding belt is overlapped on the upper surface of the slope plate, a first elastic member is arranged on the support plate to push the sliding member close to the steel pipe, a second elastic member is arranged on the slope plate to incline the slope plate to the feeding end of the device, and the elasticity of the first elastic member is greater than that of the second elastic member, and the two sides of the mounting groove are provided with limiting blocks for limiting the inclination angle of the slope plate.

[0015] Further technical solutions of the present application are that the two side surfaces of the second grinding belt and the first grinding belt are arc-shaped, the corners of the first roller and the second roller have round corners, and the grinding belt is wrapped on the round corners, so that the corners of the steel pipe can be in contact with the round corners of the grinding belt when the steel pipe is fed forward.

[0016] Further technical solutions of the present application are that the two second grinding belts gradually increase the grinding mesh from the feeding end of the steel pipe to the discharging end of the steel pipe, and the grinding mesh of the first grinding belt between the two second grinding belts is between the grinding meshes of the two second grinding belts.

[0017] A grinding method for hollow steel conveying includes the following steps:

[0018] S1, start the device, and operate the conveying unit and the grinding unit;

[0019] S2, slowly push the steel pipe into the interior of the machine table, so that the steel pipe passes through the first conveying unit and the first grinding unit;

[0020] S3, drive the steel pipe to be conveyed into the interior of the device through the conveying unit and the grinding unit, and at the same time, the grinding unit can grind the steel pipe;

[0021] S4, when it is necessary to replace the steel pipe of different sizes, the height of the conveying unit remains unchanged, the height of the lifting plate is adjusted, the height of the grinding unit is adjusted, the second grinding belt can be in contact with the outer surface of the steel pipe, and a certain pressure is generated between the second grinding belt and the steel pipe, so that the grinding of the steel pipe is satisfied.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] 1. Before grinding, the two grinding units are lifted and lowered by the lifting plate, so that the grinding size can be quickly adjusted, and the grinding unit can be adapted to steel pipes of different sizes.

[0024] 2、Through the inclination setting of the polishing unit and the conveying unit, the steel pipe can be polished and conveyed at the same time.

[0025] 3、Through the setting of the edge polishing unit, the edge of the steel pipe can be polished to avoid hurting the staff, and the edge polishing device can polish the edge of the steel pipe into a round shape, so that the steel pipe is better protected from scratches. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and serve to explain the principles of the present application, and are not intended to limit the present application. In the drawings:

[0027] Figure 1 is a structural schematic diagram of a specific embodiment in the present application;

[0028] Figure 2 is a structural schematic diagram of the internal structure of a specific embodiment in the present application;

[0029] Figure 3 is an axonometric sectional view of a specific embodiment in the present application;

[0030] Figure 4 is a structural schematic diagram of the conveying unit in a specific embodiment in the present application;

[0031] Figure 5 is Figure 3 is an enlarged schematic diagram of the structure at A in the present application;

[0032] Figure 6 is a structural schematic diagram of the polishing unit in a specific embodiment in the present application;

[0033] Figure 7 is a structural schematic diagram of a second embodiment in the present application;

[0034] Figure 8 is a structural schematic diagram of the conveying unit and the polishing unit after angle adjustment in the present application.

[0035] In the figure: 1, machine table; 11, fixed plate; 12, lifting plate; 13, second driving device; 2, conveying unit; 21, fixed frame; 211, first rotating rod; 212, first gear; 213, reversing gear; 214, rack; 22, first roller; 23, first polishing belt; 24, first driving device; 3, polishing unit; 31, mounting frame; 32, second roller; 33, second polishing belt; 34, third driving device; 35, second gear; 36, second rotating rod; 37, fixing piece; 38, fourth driving device; 4, edge grinding unit; 41, inclined plate; 42, sliding piece; 43, first elastic piece; 44, second elastic piece; 45, limiting block; 5, support plate; 51, mounting groove. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0037] Please refer to Figures 1-8 The present application provides the following technical solutions: a hollow steel conveying and polishing device and method, comprising a machine table 1, a conveying unit 2, a polishing unit 3 and an edge grinding unit 4.

[0038] The machine table 1 is placed on the ground, the steel pipe enters the inside of the equipment from the left side of the equipment and moves out from the right side of the equipment, the conveying unit 2 is installed on the machine table 1, the conveying unit 2 is horizontally arranged, so that the steel pipe can be placed above the conveying unit 2, and the conveying unit 2 can also drive the steel pipe to rotate when conveying the steel pipe, the polishing unit 3 is installed on the machine table 1 and can be lifted on the machine table 1, when the steel pipe enters below the polishing unit 3, the polishing unit 3 moves downward to make the polishing unit 3 abut against the steel pipe, and then the polishing unit 3 is operated to polish the steel pipe, when the steel pipe enters the conveying unit 2 and the polishing unit 3, the end of the steel pipe will pass through the edge grinding unit 4, the edge grinding unit 4 can polish the edge of the end of the steel pipe, so as to clean burrs at the edge and avoid the risk of scratching the workers.

[0039] Please refer to Figure 2 and Figure 3The conveying unit 2 is provided with three, which are uniformly arranged along the moving direction of the steel pipe, the conveying unit 2 includes a fixed plate 11 located inside the machine table 1, the fixed plate 11 is horizontally arranged and fixed inside the machine table 1, and can also be fixed by screws to avoid the up and down floating movement of the fixed plate 11, a fixed frame 21 is installed on the fixed plate 11, three first rollers 22 are installed on the fixed frame 21, the three first rollers 22 are distributed in an inverted triangle shape, and the axes of two of the first rollers 22 are located on the same horizontal plane, and the two first rollers 22 are both higher than the upper surface of the fixed frame 21 and the machine table 1, and the other first roller 22 is installed below the fixed frame 21, a first driving device 24 is installed on the fixed frame 21, the first driving device 24 is a motor, the output end of which is connected with the first roller 22, a first grinding belt 23 is arranged on the first roller 22, the first grinding belt 23 is sequentially lapped on the three first rollers 22, and the first grinding belt 23 is tensioned, when the first driving device 24 operates, one of the first rollers 22 can be driven to rotate, so that the first grinding belt 23 can rotate due to the tensioned state of the first grinding belt 23, when the first grinding belt 23 rotates, the steel pipe can be ground, in the plurality of conveying units 2, the rotating speed of the first grinding belt 23 on the middle conveying unit 2 is faster than that of the first grinding belt 23 on the two side conveying units 2, so that the rotating speed of the first grinding belt 23 on the middle conveying unit 2 and the rotating speed of the steel pipe form a speed difference, thereby the first grinding belt 23 on the middle conveying unit 2 can grind the surface of the steel pipe.

[0040] Please refer to Figures 2-4 The machine table 1 is provided with a supporting plate 5, the bottom of the supporting plate 5 abuts against the top of the fixed frame 21, and the top of the supporting plate 5 abuts against the inner ring of the first grinding belt 23, so that when the steel pipe falls on the first grinding belt 23, the supporting plate 5 can support the steel pipe to avoid the inner concave deformation of the grinding belt caused by the self-gravity of the steel pipe.

[0041] Please refer to Figure 4 and Figure 5The edge grinding unit 4 comprises a mounting groove 51 opened on the support plate 5, a sliding piece 42 is arranged in the mounting groove 51, the sliding piece 42 penetrates from the inside of the mounting groove 51 to the bottom of the support plate 5, and the sliding piece 42 is a column with a rectangular cross section, so that the sliding piece 42 cannot rotate on the support plate 5, and the sliding piece 42 is rotationally arranged with an inclined plate 41 at one end of the mounting groove 51, the rotation axis of the sliding piece 42 and the inclined plate 41 is located in the middle of the inclined plate 41, and the rotation axis of the inclined plate 41 is higher than the upper surface of the support plate 5, when the inclined plate 41 is inclined, the bottom side of the inclined plate 41 is lower than the upper surface of the support plate 5, the first grinding belt 23 is overlapped on the upper surface of the inclined plate 41, the first elastic piece 43 is arranged on the support plate 5, the first elastic piece 43 is a compression spring, one end of the first elastic piece 43 abuts against the inner bottom wall of the mounting groove 51, and the other end of the first elastic piece 43 abuts against the sliding piece 42, so as to push the sliding piece 42 close to the steel pipe, the second elastic piece 44 is arranged on the side of the inclined plate 41 close to the feeding end of the device, the second elastic piece 44 is a tensile spring, one end of the second elastic piece 44 is fixed to the inner bottom wall of the mounting groove 51, and the other end of the second elastic piece 44 is fixed to the inclined plate 41 close to the feeding end of the device, so that the upper surface of the inclined plate 41 is always inclined towards the feeding end of the device under the condition of no force, 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, and the second elastic piece 44 can also be replaced by a counterweight (not shown in the figure), the counterweight is arranged on the side of the inclined plate 41 close to the feeding end of the device, and the gravity of the counterweight can also achieve the purpose of inclining the inclined plate 41 towards the feeding end of the device, and the limiting blocks 45 are mirror arranged 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 is inclined to the left and right sides respectively, the two sides of the inclined plate 41 can abut against the limiting blocks 45, and the inclination angle of the inclined plate 41 can be limited.

[0042] In use of the edge grinding unit 4, the initial state of the edge grinding unit 4 is that: under the action of the first elastic member 43 and the second elastic member 44, the inclined plate 41 is in an inclined state, and the upper surface of the inclined plate 41 faces the feeding end of the device, at this time, the steel pipe worker controls the steel pipe to be slowly pushed to the conveying unit 2, and since the bottom side of the inclined plate 41 is lower than the upper surface of the supporting plate 5, no interference will occur between the steel pipe and the inclined plate 41 during the pushing of the steel pipe, and the edge of the steel pipe first contacts the first grinding belt 23 on the upper surface of the inclined plate 41, and through the running of the first grinding belt 23, the worker controls the steel pipe to be slowly rotated, so that the burrs at the corners of the steel pipe can be cleaned, and then when the steel pipe is completely pressed on the inclined plate 41, the inclined plate 41 is pressed into the inside 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 to the inclined plate 41, and when the end of the steel pipe is located on the right side of the sliding member 42, the sliding member 42 is pushed to move upward and the inclined plate 41 is pushed to move upward under the action of the first elastic member 43, and since the right side of the inclined plate 41 is fixed by the gravity 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 inclines to the other side, so that the first grinding belt 23 on the upper part of 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.

[0043] When grinding the edge of the steel pipe, since the angle of the inclined plate 41 gradually changes, the angle of the edge of the steel pipe gradually changes, so that the edge of the steel pipe is not only a inclined plane, but also a smooth arc, that is, the edge of the steel pipe can be ground into a round corner by the edge grinding unit 4, so that the anti-scratch effect of the steel pipe is better, in addition, the round corner can disperse stress through smooth transition, and significantly improve the structural reliability of the steel pipe.

[0044] Please refer to Figure 2 , Figure 3 and Figure 6 , the lifting plate 12 is arranged on the machine table 1 and can slide up and down on the machine table 1, the lifting plate 12 is located above the fixed plate 11, and 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, the second driving device 13 is arranged on the machine table 1, the second driving device 13 is a hydraulic cylinder, the second driving device 13 is fixed in the inside of the machine table 1, the output end of the second driving device 13 is connected with the lifting plate 12, and the lifting plate 12 can be driven to rise and fall by the second driving device 13.

[0045] Please refer to Figure 6 and Figure 7The polishing unit 3 comprises a mounting frame 31 arranged on the lifting plate 12, the mounting frame 31 is arranged in an inclined manner and is arranged at an acute angle with the lifting plate 12, second rollers 32 are rotatably arranged at both ends of the mounting frame 31, second polishing belts 33 are arranged on the second rollers 32, and third driving devices 34 for driving the second rollers 32 to rotate are arranged on the mounting frame 31. The third driving devices 34 are motors, the output ends of which are connected with one of the second rollers 32, so that one of the second rollers 32 rotates, thereby moving the second polishing belt 33. The polishing unit 3 is provided with two, which are arranged in a mirror image and are staggered left and right, so that the two polishing units 3 are arranged in a cross manner, and the steel pipe can pass below the two polishing units 3, and the two polishing units 3 are in contact with the steel pipe by moving the lifting plate 12 downward, so that the surface of the steel pipe can be polished. The above-mentioned two polishing units 3 arranged in a mirror image form a group, and the polishing device is uniformly arrayed in multiple groups in the moving direction of the steel pipe and is arranged between every two adjacent conveying units 2.

[0046] In use, first, the height of the polishing unit 3 is adjusted by the lifting plate 12 until the second polishing belt 33 can be in contact with the surface of the steel pipe, then the steel pipe is conveyed by the first conveying unit 2 and cooperated with the staff, when the steel pipe enters below the first polishing unit 3, the surface of the steel pipe can be preliminarily polished, in the polishing process, the first polishing unit 3 can clean a large amount of rust on the surface of the steel pipe, the second polishing belt 33 on the first polishing unit 3 is 50-70 mesh sandpaper, which can quickly break the thick rust layer and stubborn oxide skin, and avoid repeatedly polishing to damage the base material, when the steel pipe moves to the first polishing belt 23 in the middle, the first polishing belt 23 is 90-120 mesh for rough polishing, and finally when the steel pipe passes below the polishing unit 3 at the end, the second polishing belt 33 is 120 mesh or more sandpaper for fine polishing of the steel pipe, and finally the edge of the steel pipe is polished again by the conveying unit 2 at the end.

[0047] Please refer to Figure 2 , Figure 3 , Figure 6 and Figure 8The bottom of the fixing frame 21 is provided with a first rotating rod 211 which penetrates the lifting plate 12 downward and rotates on the fixing plate 11, and the first rotating rod 211 can rotate relative to the fixing plate 11 and can rotate relative to the lifting plate 12 while enabling the lifting plate 12 to move up and down along the first rotating rod 211. The first gear 212 is arranged on the lifting plate 12, the first rotating rod 211 penetrates the shaft center of the first gear 212, and the cross section of the first rotating rod 211 is rectangular, so that the first gear 212 can drive the first rotating rod 211 to rotate when rotating. The reversing gear 213 is arranged on the lifting plate 12 and is meshed with the first gear 212 on one side. The two racks 214 are meshed with the reversing gear 213 on both sides and are installed on the lifting plate 12 and can slide left and right along the moving direction of the steel pipe. The second gear 35 is meshed with the rack 214, and the rotating shaft of the second gear 35 is provided with the second rotating rod 36. The end of the second rotating rod 36 away from the second gear 35 is connected with 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 rotating. The fixing piece 37 is fixedly connected on the lifting plate 12 and can be detachably arranged on the lifting plate 12 through screws. The sleeve is arranged on the lifting plate 12, so that the second rotating rod 36 is arranged in the interior of the sleeve and is used for fixing the second rotating rod 36, so that the second rotating rod 36 can only rotate and displacement of the second rotating rod 36 is avoided. The fourth driving device 38 is arranged on the lifting plate 12 and is a hydraulic cylinder which is fixed on the lifting plate 12 and has a telescopic end connected with the rack 214.

[0048] Please refer to Figure 8In use, the fourth drive device 38 shortens the rack 214 near the front end to drive the rack 214 to slide to the left on the lifting plate 12, when the rack 214 slides, the reversing gear 213 is driven to rotate clockwise, and the second gear 35 near the front end is driven to rotate clockwise synchronously, the reversing gear 213 drives the first gear 212 to rotate counterclockwise synchronously, when the first gear 212 rotates counterclockwise, the first rotating rod 211 and the fixed frame 21 rotate counterclockwise, so that the first polishing belt 23 on the fixed frame 21 is inclined at an angle, the side near the front end inclines to the right, and the side near the rear end inclines to the left, when the second gear 35 near the front end rotates clockwise, the top end of the mounting frame 31 is driven to swing to the right, and the rack 214 at the rear end is driven to slide to the right by the reversing gear 213, so that the second gear 35 at the rear end rotates counterclockwise, and the top end of the mounting frame 31 at the rear end swings to the left, so that the top ends of the two mounting frames 31 move away from each other, and the second polishing belt 33 mounted on the mounting frame 31 remains in an inclined state, the first polishing belt 23 and the second polishing belt 33 are matched in modulus between the first gear 212 and the second gear 35, so that the inclination angles of the first polishing belt 23 and the second polishing belt 33 are consistent, when the first polishing belt 23 and the second polishing belt 33 are both in an inclined state and rotate, when the steel pipe is placed on the first polishing belt 23, due to the gravity of the steel pipe, the friction between the steel pipe and the first polishing belt 23 is large, and the left and right sides of the steel pipe are limited by the two second polishing belts 33, so that the first polishing belt 23 drives the steel pipe to rotate when the first polishing belt 23 rotates, because the first polishing belt 23 is inclined, the first polishing belt 23 has an axial conveying force on the steel pipe, so that the steel pipe moves axially while rotating, the second polishing belt 33 is inclined, so that the second polishing belt 33 can assist the steel pipe to move axially while polishing the steel pipe, and the inclination angles of the first polishing belt 23 and the second polishing belt 33 can be adjusted to adjust the conveying speed of the steel pipe.

[0049] Please refer to Figure 7 , another embodiment provided by the edge grinding unit 4 is different from the first embodiment, the two sides of the second polishing belt 33 or the first polishing belt 23 are arc-shaped, the cross section is in the shape of a parenthesis, and the corners of the first roller 22 and the second roller 32 have round corners, so that the polishing belt is wrapped around the round corners, when the steel pipe is fed forward, the corners of the steel pipe first contact the round corners of the polishing belt, so that the corners of the steel pipe can be polished, and then smoothly transition from the round corners to the polishing surface of the polishing belt, so that the steel pipe can be polished, and this embodiment has a simpler structure than the first embodiment and is more convenient for equipment maintenance.

[0050] A polishing method for hollow steel pipes, comprising the following steps:

[0051] S1, start the device, the conveying unit 2 and the polishing unit 3 run;

[0052] S2, slowly push the steel pipe to the inside of the machine table 1, so that the steel pipe passes through the first conveying unit 2 and the first polishing unit 3;

[0053] S3, through the conveying unit 2 and the polishing unit 3, and cooperate with manual can drive the steel pipe to the inside of the device, while the polishing unit 3 can polish the steel pipe;

[0054] S4, when it is necessary to replace the steel pipe of different sizes, the height of the conveying unit 2 is unchanged, the height of the lifting plate 12 is adjusted, the height of the polishing unit 3 is adjusted, the second polishing belt 33 can be in contact with the outer surface of the steel pipe, and there is a certain pressure between the second polishing belt 33 and the steel pipe, so as to satisfy the polishing of the steel pipe.

Claims

1. A hollow steel transfer grinding device comprising: The machine table (1) is characterized in that it further comprises: The conveying unit (2) is provided with three, which are uniformly distributed on the machine table (1), the conveying unit (2) comprises a fixed plate (11) located inside the machine table (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 triangular shape, and a first polishing belt (23) is sequentially overlapped on the three first rollers (22), the first polishing belt (23) can move relative to the fixed frame (21); The polishing unit (3) is arranged between the three conveying units (2), the polishing unit (3) comprises a lifting plate (12) which slides up and down inside the machine table (1), an installation frame (31) is arranged on the lifting plate (12), the installation frame (31) is arranged in an inclined manner, two second rollers (32) are rotatably arranged at both ends of the installation frame (31), and a second polishing belt (33) is arranged on the second roller (32); The polishing units (3) are arranged in pairs, each pair of polishing units (3) are mirror image arranged with each other, and are staggered left and right with each other, and the two polishing units (3) are arranged in a cross shape, and the intersection point is located at the top of the polishing unit (3), and the steel pipe can pass through the lower part of the two polishing units (3); The bottom of the fixed frame (21) is provided with a first rotating rod (211) which can rotate on the fixed plate (11), a first gear (212) is arranged on the lifting plate (12), the first rotating rod (211) penetrates 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) engaged with the first gear (212), and a rack (214) engaged with the reversing gear (213); The two sides of the reversing gear (213) are engaged with the racks (214), the two racks (214) are engaged with second gears (35), a second rotating rod (36) is arranged on the rotation axis of the second gear (35), one end of the second rotating rod (36) is connected with the installation frame (31), and the axis of the second rotating rod (36) is perpendicular to the installation frame (31), and the lifting plate (12) is provided with a fixing member (37) for fixing the second rotating rod (36); The machine table (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 polishing belt (23), so as to support the steel pipe.

2. A hollow steel transfer polishing device according to claim 1, wherein: The edge grinding unit (4) comprises a mounting groove (51) formed on the support plate (5), a sliding piece (42) sliding up and down is arranged in the mounting groove (51) and penetrates to the bottom of the support plate (5), the sliding piece (42) is rotatably arranged with an inclined plate (41) at one end of the mounting groove (51), the rotation axis of the sliding piece (42) and the inclined plate (41) is located in the middle of the inclined plate (41), the rotation axis of the inclined plate (41) is higher than the upper surface of the support plate (5), the lowest side of the inclined plate (41) is lower than the upper surface of the support plate (5) when the inclined plate (41) is inclined, the first grinding belt (23) is overlapped on the upper surface of the inclined plate (41), the first elastic piece (43) for pushing the sliding piece (42) to be close to the steel pipe is arranged on the support plate (5), the second elastic piece (44) for making the inclined plate (41) be inclined to the feeding end of the equipment is arranged on the inclined plate (41), and the elasticity of the first elastic piece (43) is greater than the elasticity of the second elastic piece (44), the two sides of the mounting groove (51) are provided with the limiting blocks (45) for limiting the inclination angle of the inclined plate (41).

3. A hollow steel transfer polishing device as claimed in claim 1, wherein: The two side surfaces of the second grinding belt (33) and the first grinding belt (23) are arc-shaped, the edge corners of the first roller (22) and the second roller (32) have round corners, and the grinding belt is wrapped on the round corners, so that the edge corners of the steel pipe can be in contact with the round corners of the grinding belt when the steel pipe is fed forward.

4. A hollow steel transfer polishing device as claimed in claim 1, wherein: The two second grinding belts (33) gradually increase the grinding mesh from the feeding end of the steel pipe to the discharging end of the steel pipe, and the grinding mesh of the first grinding belt (23) located between the two second grinding belts (33) is between the grinding meshes of the two second grinding belts (33).

5. A method of grinding a hollow steel transfer, characterized by: The hollow steel conveying and grinding device comprises the following steps: S1, starting the equipment, the conveying unit (2) and the grinding unit (3) are operated; S2, the steel pipe is slowly pushed into the inside of the machine table (1), so that the steel pipe passes through the first conveying unit (2) and the first grinding unit (3); S3, the steel pipe is conveyed into the inside of the equipment by the conveying unit (2) and the grinding unit (3) and driven by artificial, and the grinding unit (3) can grind the steel pipe; S4, when different sizes of steel pipes need to be replaced, the height of the conveying unit (2) is unchanged, the height of the lifting plate (12) is adjusted, the height of the grinding unit (3) is adjusted, the second grinding belt (33) can be in contact with the outer surface of the steel pipe, and a certain pressure is generated between the second grinding belt (33) and the steel pipe, so that the steel pipe can be ground.

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