A steel pipe pole welding positioning device

Abstract

The present invention belongs to the field of steel pipe welding, and specifically relates to a welding positioning device for steel pipe poles, including a device base. Four groups of rotating cylinders are fixedly connected to the device base. The top of the rotating cylinder abuts against the bottom end of the steel pipe pole main body. A positioning mechanism is arranged inside the device base. The positioning mechanism includes a handle, which is fixedly connected to a rotating rod. The rotating rod is rotatably connected inside the device base. A moving block is threadedly connected to the rotating rod. Connecting rods are rotatably connected to both the left and right sides of the moving block; through the structural design of the positioning mechanism, when grooving and welding the steel pipe pole main body, the steel pipe pole main body can be clamped and fixed, avoiding the movement of the steel pipe pole main body and the need to repeatedly fix the steel pipe pole main body. After welding, when the grinding device approaches the steel pipe pole main body, the clamping and fixing on the steel pipe pole main body will be automatically released, so as to facilitate the grinding and polishing of the weld by the grinding device.

Description

Technical Field

[0001] The present invention relates to the field of steel pipe welding, and specifically to a welding positioning device for steel pipe poles. Background Art

[0002] Steel pipe poles are usually struts with steel pipes as the main body. During the construction process, in order to meet the requirements of different lengths, steel pipe poles are welded together. To ensure the welding quality, the steel pipe poles are fixed by a positioning device.

[0003] According to a steel pipe welding positioning device proposed in the patent document CN202011150463.8, which relates to the technical field of steel pipe welding construction. It includes an adjusting device and a clamping device. The key technology is that the adjusting device installs a slide rail on the outer wall of the positioning pipe, and a slider is arranged in the groove of the slide rail. The clamping device installs a bottom plate on the positioning pipe. A steel pipe channel is provided at one end of the bottom plate close to the positioning pipe. A baffle is installed at one end of the bottom plate, and a hole is opened on the baffle. A pull rod passes through the hole on the baffle. One end of the pull rod installs a clamping plate, and a spring is sleeved on the pull rod between the clamping plate and the baffle. The ends of the two positioning pipes with clamping devices are movably connected to form a steel pipe welding positioning device. The beneficial effects of the present invention are: the two positioning pipes are opened and closed through hinges or other structures, and the angle is adjusted through the adjusting device to meet the multi-angle welding requirements, and the welding accuracy is high. The steel pipe to be welded is fixed by the spring expansion and contraction, which is applicable to steel pipes of various shapes and sizes, with fast positioning speed and high construction efficiency.

[0004] However, the welding positioning device in the above technology can only position the steel pipe during welding, and its function is relatively single. The complete welding steps of the steel pipe include opening a groove at the welding position before welding, fixing the steel pipe during welding, and grinding and polishing the weld after welding. Since different steps use different tools and equipment, it is necessary to repeatedly fix the steel pipe during actual operation, which is rather troublesome. Therefore, a welding positioning device for steel pipe poles is proposed to solve the above problems. Summary of the Invention

[0005] In order to solve the problem that the welding positioning device in the above technology can only position the steel pipe during welding, and its function is relatively single. The complete welding steps of the steel pipe include opening a groove at the welding position before welding, fixing the steel pipe during welding, and grinding and polishing the weld after welding. Since different steps use different tools and equipment, it is necessary to repeatedly fix the steel pipe during actual operation, which is rather troublesome, the present invention proposes a welding positioning device for steel pipe poles.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A steel pipe pole welding positioning device described in the present invention includes a device base, on which four groups of rotating cylinders are fixedly connected. The top end of the rotating cylinder abuts against the bottom end of the steel pipe pole body. A positioning mechanism is arranged inside the device base. The positioning mechanism includes a handle, which is fixedly connected to a rotating rod. The rotating rod is rotatably connected inside the device base. A moving block is threadedly connected to the rotating rod. Connecting rods are rotatably connected to both the left and right sides of the moving block. The connecting rods are rotatably connected to a top block, and the top block abuts against two bottom plates. The bottom plates are fixedly connected to the bottom ends of support columns. The top end of the support column is slidably connected to a support plate. A mounting plate is fixedly connected to the side of the support plate close to the inner wall of the steel pipe pole body, and the mounting plate abuts against the inner wall of the steel pipe pole body. A support rod passes through the support column, and the support rod is fixedly connected to the top end of the device base. A first spring is sleeved on the support rod, and both sides of the first spring are fixedly connected to the support rod and the support column respectively. A connecting plate is fixedly connected to the right side of the moving block, and the rear end of the connecting plate is fixedly connected to the bottom end of a grinding device. The bottom end of the grinding device is slidably connected to two sets of sleeve rods, and the sleeve rods are fixedly connected to the inner wall of the device base. A column is fixedly connected to the top end of the moving block, and a fixing component is arranged on the column for fixing the angle grinder.

[0007] Preferably, a trapezoidal block is fixedly connected to the top end of the support column, and the trapezoidal block is slidably connected inside a trapezoidal groove, and the trapezoidal groove is opened at the bottom end of the support plate.

[0008] Preferably, two sets of convex blocks are fixedly connected to the side of the support plate away from the mounting plate. The convex blocks are rotatably connected to a connecting rod. The bottom end of the connecting rod is rotatably connected to a connecting block. A limiting column is rotatably connected to the side of the connecting block away from the connecting rod, and the bottom end of the limiting column is close to the inner wall of the steel pipe pole body.

[0009] Preferably, a notch is opened on the support column. A fixing rod is fixedly connected to the top end of the top block. The fixing rod is designed in an L shape, and a fixing block is fixedly connected to the fixing rod. The fixing rod is slidably connected to a guiding rod, and the guiding rod is fixedly connected to the inner wall of the device base.

[0010] Preferably, the fixing component includes a mounting block, which is fixedly connected to the top end of the column. The mounting block is rotatably connected to a rotating block. Gaskets are fixedly connected to the inner walls of the mounting block and the rotating block, and the gaskets are made of rubber material.

[0011] Preferably, the column is slidably connected in a second moving groove opened at the top end of the device base. Two sets of cover plates are fixedly connected to the column, and the cover plates are attached to the top end of the device base.

[0012] Preferably, a baffle is fixedly connected to the front end of the grinding device, the baffle is attached to the top end of the device base, and two sets of first movable grooves are provided on the device base.

[0013] Preferably, the side of the mounting plate that abuts against the inner wall of the steel pipe rod body is arc-shaped, and the mounting plate is made of rubber material.

[0014] Preferably, a placement groove is provided at the top end of the support plate, and a counterweight is fixedly connected inside the placement groove.

[0015] Preferably, a sliding groove is provided on the inner wall of the bottom plate, a slider is slidably connected inside the sliding groove, and the slider is fixedly connected to both sides of the top block.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. Through the structural design of the positioning mechanism of the present invention, when grooving and welding the steel pipe rod body, the steel pipe rod body can be clamped and fixed, avoiding the movement of the steel pipe rod body and the need to repeatedly fix the steel pipe rod body. After welding is completed, when the grinding device approaches the steel pipe rod body, the clamping and fixing on the steel pipe rod body will be automatically released, so as to facilitate the grinding and polishing of the weld by the grinding device, solving the problem in the prior art that the welding positioning device can only position the steel pipe during welding, with a relatively single function. The complete welding steps of the steel pipe include grooving at the welding position before welding, fixing the steel pipe during welding, and grinding and polishing the weld after welding is completed. Since different steps require the use of different tools and equipment, it is necessary to repeatedly fix the steel pipe during actual operation, which is rather troublesome.

[0018] 2. Through the structural design of the limiting column of the present invention, after the clamping and fixing of the steel pipe rod body is released, the two support plates will approach each other, and the connecting block will move downward through the rotation of the connecting rod. The limiting column rotating on the connecting block can contact the inner wall of the steel pipe rod body, so as to fix the position of the steel pipe rod body during grinding and polishing, avoiding the deviation of the position of the steel pipe rod body.

[0019] 3. Through the structural design of the fixing block of the present invention, after the clamping and fixing of the steel pipe rod body is released, the two support columns will also approach each other. At this time, the fixing block can fix the two support columns simultaneously, avoiding the movement of the support columns at this time, thereby ensuring that the position of the limiting column will not change, so as to facilitate the fixing of the steel pipe rod body by the limiting column. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 Schematic diagram of the internal structure of the device base of the present invention;

[0023] Figure 3 Schematic diagram of the connection structure of the rotating rod of the present invention;

[0024] Figure 4 Schematic diagram of the connection structure of the support column of the present invention;

[0025] Figure 5 Schematic diagram of the structure of the support plate of the present invention;

[0026] Figure 6 Schematic diagram of the connection structure of the limit column of the present invention;

[0027] Figure 7 Schematic diagram of the sectional structure of the present invention;

[0028] Figure 8 Schematic diagram of the connection structure at the bottom end of the grinding device of the present invention;

[0029] Figure 9 Schematic diagram of the position structure of the rotating cylinder of the present invention;

[0030] Figure 10 Schematic diagram of the structure of the column of the present invention.

[0031] In the figure: 1, device base; 20, steel pipe rod main body; 21, grinding device; 22, handle; 23, moving block; 24, rotating rod; 25, connecting rod; 26, slider; 27, top block; 28, fixed rod; 29, fixed block; 30, chute; 31, bottom plate; 32, notch; 33, support column; 34, mounting plate; 35, first spring; 36, support rod; 37, counterweight; 38, placement groove; 39, limit column; 40, connecting block; 41, connecting rod; 42, convex block; 43, guide rod; 44, connecting plate; 46, sleeve rod; 47, baffle; 48, first movable groove; 49, second movable groove; 50, rotating cylinder; 51, cover plate; 52, column; 53, gasket; 54, mounting block; 55, rotating block; 56, angle grinder; 57, trapezoidal groove; 58, trapezoidal block; 59, support plate. Detailed implementation mode

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention. Embodiment 1

[0033] Please refer to Figure 1 - Figure 10 As shown, a steel pipe pole welding positioning device includes a device base 1. Four groups of rotating cylinders 50 are fixedly connected to the device base 1. The top end of the rotating cylinder 50 abuts against the bottom end of the steel pipe pole main body 20. A positioning mechanism is arranged inside the device base 1. The positioning mechanism includes a handle 22. The handle 22 is fixedly connected to a rotating rod 24. The rotating rod 24 is rotatably connected inside the device base 1. A moving block 23 is threadedly connected to the rotating rod 24. Connecting rods 25 are rotatably connected to both the left and right sides of the moving block 23. The connecting rod 25 is rotatably connected to a top block 27. The top block 27 abuts against two bottom plates 31. The bottom plates 31 are fixedly connected to the bottom ends of support columns 33. A support plate 59 is slidably connected to the top end of the support column 33. A mounting plate 34 is fixedly connected to the side of the support plate 59 close to the inner wall of the steel pipe pole main body 20. The mounting plate 34 abuts against the inner wall of the steel pipe pole main body 20. A support rod 36 passes through the support column 33. The support rod 36 is fixedly connected to the top end of the device base 1. A first spring 35 is sleeved on the support rod 36. The two sides of the first spring 35 are respectively fixedly connected to the support rod 36 and the support column 33. A connecting plate 44 is fixedly connected to the right side of the moving block 23. The rear end of the connecting plate 44 is fixedly connected to the bottom end of a grinding device 21. The bottom end of the grinding device 21 is slidably connected to two sleeve rods 46. The sleeve rods 46 are fixedly connected to the inner wall of the device base 1. A column 52 is fixedly connected to the top end of the moving block 23. A fixing component is arranged on the column 52 for fixing the angle grinder 56;

[0034] Through the structural design of the positioning mechanism, when grooving and welding the main body 20 of the steel pipe pole, the main body 20 of the steel pipe pole can be clamped and fixed, avoiding the movement of the main body 20 of the steel pipe pole and the need to repeatedly fix the main body 20 of the steel pipe pole. After welding, when the grinding device 21 approaches the main body 20 of the steel pipe pole, the clamping and fixing on the main body 20 of the steel pipe pole will be automatically released, so as to facilitate the grinding and polishing of the weld by the grinding device 21. During operation, the main body 20 of the steel pipe pole is sequentially sleeved on the support plate 59, and the handle 22 is rotated. The handle 22 is fixedly connected to the rotating rod 24 inside the device base 1. When the rotating rod 24 rotates, the moving block 23 threadedly connected to the rotating rod 24 will move backward. When the moving block 23 moves, the connecting rods 25 rotatably connected to its left and right sides will push the top block 27 to move. The top block 27 slides in the two bottom plates 31, and the two bottom plates 31 abut against both sides of the top block 27. At this time, the first spring 35 sleeved on the support rod 36 will be in a compressed state. The mounting plate 34 fixed to one side of the support plate 59 will abut against the inner wall of the main body 20 of the steel pipe pole to clamp and fix the main body 20 of the steel pipe pole. The bottom end of the column 52 is fixed to the top end of the moving block 23 and can move together with the moving block 23. When the moving block 23 moves backward, the angle grinder 56 can contact the main body 20 of the steel pipe pole, so as to facilitate the grooving of the main body 20 of the steel pipe pole by the angle grinder 56. Then, the handle 22 is rotated in the reverse direction, and the angle grinder 56 can move away from the main body 20 of the steel pipe pole. After the moving block 23 is reset, at this time, the handle 22 is continued to be rotated in the reverse direction, and the moving block 23 will move forward. A connecting plate 44 is fixed to the right side of the moving block 23, and the connecting plate 44 is connected to the bottom end of the grinding device 21. Therefore, the grinding device 21 will move forward until the grinding wheel on the grinding device 21 fits the weld of the main body 20 of the steel pipe pole. Starting the grinding device 21 can grind and polish the weld on the main body 20 of the steel pipe pole, and the main body 20 of the steel pipe pole will also rotate under the action of the grinding wheel. When the moving block 23 moves forward, the connecting rod 25 pulls the top block 27 to move, and the top block 27 will slide out of the two bottom plates 31. Without the support of the top block 27, the support columns 33 will slide along the support rod 36 under the push of the first spring 35. The two support columns 33 will approach each other, and the position of the support columns 33 changes, and the mounting plate 34 will no longer abut against the inner wall of the main body 20 of the steel pipe pole, so as to automatically release the clamping and fixing of the main body 20 of the steel pipe pole during grinding and polishing. Four rotating cylinders 50 are fixed to the top end of the device base 1, and the rotating cylinders 50 are used to support the bottom end of the main body 20 of the steel pipe pole and ensure the stable rotation of the main body 20 of the steel pipe pole during grinding and polishing.

[0035] Furthermore, the top end of the support column 33 is fixedly connected with a trapezoidal block 58, and the trapezoidal block 58 is slidably connected inside the trapezoidal groove 57, and the trapezoidal groove 57 is opened at the bottom end of the support plate 59;

[0036] During operation, a trapezoidal block 58 is fixed to the top end of the support column 33. The trapezoidal block 58 slides inside the trapezoidal groove 57 to facilitate adjusting the position of the support plate 59 on the support column 33. When the welding of the steel pipe pole main body 20 is completed, the support plate 59 is pushed to both sides to move the support plate 59 away from the steel pipe pole main body 20, and then the steel pipe pole main body 20 can be smoothly removed.

[0037] Furthermore, two groups of convex blocks 42 are fixedly connected to the side of the support plate 59 away from the mounting plate 34. The convex blocks 42 are rotatably connected to the connecting rod 41. The bottom end of the connecting rod 41 is rotatably connected to the connecting block 40. The side of the connecting block 40 away from the connecting rod 41 is rotatably connected to a limit post 39. The bottom end of the limit post 39 is close to the inner wall of the steel pipe pole main body 20.

[0038] Through the structural design of the limit post 39, after the clamping and fixing of the steel pipe pole main body 20 is released, the two support plates 59 will approach each other, and the connecting block 40 will move downward through the rotation of the connecting rod 41. The limit post 39 rotatably connected to the connecting block 40 can then contact the inner wall of the steel pipe pole main body 20, so as to fix the position of the steel pipe pole main body 20 during grinding and polishing, and avoid the position of the steel pipe pole main body 20 from shifting. A convex block 42 is fixed to one side of the support plate 59. The convex block 42 is connected to the connecting block 40 through the connecting rod 41. When the two support plates 59 approach each other, the connecting rod 41 will push the connecting block 40 downward, and the limit post 39 rotatably connected to the connecting block 40 will move downward and contact the inner wall of the steel pipe pole main body 20. The movement of the steel pipe pole main body 20 in the vertical direction is limited by the limit post 39, and combined with the support of the rotating cylinder 50 on the front and rear sides of the steel pipe pole main body 20, the steel pipe pole main body 20 is not likely to shift on the rotating cylinder 50 during grinding and polishing, thus ensuring the grinding effect of the grinding device 21 on the steel pipe pole main body 20.

[0039] Furthermore, a notch 32 is provided on the support column 33. The top end of the top block 27 is fixedly connected to a fixed rod 28. The fixed rod 28 is designed in an L shape. A fixed block 29 is fixedly connected to the fixed rod 28. The fixed rod 28 is slidably connected to the guide rod 43. The guide rod 43 is fixedly connected to the inner wall of the device base 1.

[0040] Through the structural design of the fixing block 29, after the clamping and fixing of the steel pipe pole body 20 is released, the two groups of support columns 33 will also approach each other. At this time, the fixing block 29 can fix the two groups of support columns 33 at the same time, avoiding the movement of the support columns 33 at this time, so as to ensure that the position of the limiting column 39 will not change, so as to facilitate the fixing of the steel pipe pole body 20 by the limiting column 39. During work, when the top block 27 slides out between the two bottom plates 31, the two groups of support columns 33 will approach each other. Since the support columns 33 are provided with notches 32, the fixing rod 28 can be smoothly inserted into the notches 32. When the top block 27 continues to move, the fixing block 29 fixed on the fixing rod 28 will contact the two groups of support columns 33 and fix the two groups of support columns 33. When the positions of the support columns 33 are fixed, the positions of the limiting column 39 and the connecting block 40 will no longer change.

[0041] Furthermore, the fixing assembly includes a mounting block 54. The mounting block 54 is fixedly connected to the top end of the column 52. The mounting block 54 is rotatably connected to the rotating block 55. Gaskets 53 are fixedly connected to the inner walls of the mounting block 54 and the rotating block 55. The gaskets 53 are made of rubber material;

[0042] During work, rotate the rotating block 55 to put the angle grinder 56 into the mounting block 54, and then rotate the rotating block 55. After the mounting block 54 and the rotating block 55 are closed, the angle grinder 56 can be fixed. Gaskets 53 are fixed on the inner walls of the mounting block 54 and the rotating block 55. Through the gaskets 53, the fixing effect of the mounting block 54 and the rotating block 55 on the angle grinder 56 can be improved. During the process of using the angle grinder 56 to cut a bevel on the steel pipe pole body 20, press down the rotating block 55 to prevent the position of the angle grinder 56 from changing.

[0043] Furthermore, the column 52 is slidably connected to the second movable groove 49. The second movable groove 49 is opened at the top end of the device base 1. Two groups of cover plates 51 are fixedly connected to the column 52. The cover plates 51 are attached to the top end of the device base 1;

[0044] During work, the cover plate 51 is fixed at the bottom end of the column 52 and is attached to the top end of the device base 1. During welding, the column 52 can block the second movable groove 49 to prevent welding slag from entering the inside of the device base 1 through the second movable groove 49.

[0045] Furthermore, a baffle 47 is fixedly connected to the front end of the grinding device 21. The baffle 47 is attached to the top end of the device base 1. Two groups of first movable grooves 48 are opened on the device base 1;

[0046] During work, the baffle 47 is fixed at the front end of the grinding device 21 and can block the first movable groove 48 during grinding to prevent welding slag or metal chips during grinding from entering the inside of the device base 1 through the first movable groove 48.

[0047] Furthermore, the side of the mounting plate 34 that abuts against the inner wall of the steel pipe pole main body 20 is designed to be arc-shaped, and the mounting plate 34 is made of rubber material;

[0048] During operation, the mounting plate 34 is designed to be arc-shaped so as to fit closely with the inner wall of the steel pipe pole main body 20, and at the same time increase the contact area with the inner wall of the steel pipe pole main body 20 to improve the clamping effect on the steel pipe pole main body 20. Embodiment 2

[0049] Please refer to Figure 3 and Figure 4 As shown, as another implementation manner of the present invention compared with Embodiment 1, a placement groove 38 is provided at the top end of the support plate 59, and a counterweight 37 is fixedly connected inside the placement groove 38;

[0050] During operation, the counterweight 37 is used to adjust the position of the center of gravity of the support plate 59 to ensure that the center of gravity of the support plate 59 is directly above the support column 33, so that when the support column 33 supports the support plate 59, the force on the top end of the support column 33 can be more balanced.

[0051] A sliding groove 30 is provided on the inner wall of the bottom plate 31, and a slider 26 is slidably connected inside the sliding groove 30. The slider 26 is fixedly connected to both sides of the top block 27;

[0052] During operation, when the top block 27 slides between the two bottom plates 31, the slider 26 fixed on the top block 27 will slide into the sliding groove 30. By the contact between the slider 26 and the inner wall of the sliding groove 30, the movement of the bottom plate 31 in the vertical direction is restricted to reduce the shaking of the bottom plate 31.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A steel pipe rod welding positioning device, comprising a device base (1), four sets of rotating cylinders (50) are fixedly connected to the device base (1), the top ends of the rotating cylinders (50) abut against the bottom ends of the steel pipe rod bodies (20), characterized in that: A positioning mechanism is provided inside the device base (1), the positioning mechanism comprising a handle (22), the handle (22) being fixedly connected to a rotating rod (24), the rotating rod (24) being rotatably connected to the inside of the device base (1), a moving block (23) being threadedly connected to the rotating rod (24), the left and right sides of the moving block (23) being rotatably connected to connecting rods (25), the connecting rods (25) being rotatably connected to a top block (27), the top block (27) being in contact with two groups of bottom plates (31), the bottom plates (31) being fixedly connected to the bottom ends of the support columns (33), the top ends of the support columns (33) being slidably connected to a supporting plate (59), the side of the supporting plate (59) close to the inner wall of the steel pipe rod body (20) being fixedly connected to a mounting plate (34), the mounting plate (34) being rotatably connected to the steel pipe rod body (20) ), a support rod (36) passes through the support column (33), the support rod (36) is fixedly connected to the top of the device base (1), a first spring (35) is sleeved on the support rod (36), the two sides of the first spring (35) are respectively fixedly connected to the support rod (36) and the support column (33), a connecting plate (44) is fixedly connected to the right side of the moving block (23), the rear end of the connecting plate (44) is fixedly connected to the bottom end of the grinding device (21), the bottom end of the grinding device (21) is slidably connected to two sets of sleeve rods (46), the sleeve rods (46) are fixedly connected to the inner wall of the device base (1), the top of the moving block (23) is fixedly connected to a column (52), the column (52) is provided with a fixing assembly, and the fixing assembly is used to fix the angle grinder (56).

2. A steel pipe rod welding positioning device according to claim 1, characterized in that: A trapezoidal block (58) is fixedly connected to the top end of the support column (33), and the trapezoidal block (58) is slidably connected inside a trapezoidal groove (57). The trapezoidal groove (57) is provided at the bottom end of the support plate (59).

3. A steel pipe rod welding positioning device according to claim 2, characterized in that: Two groups of protrusions (42) are fixedly connected to a side of the support plate (59) away from the mounting plate (34); the protrusions (42) are rotatably connected to the connecting rod (41); the bottom end of the connecting rod (41) is rotatably connected to the connecting block (40); the side of the connecting block (40) away from the connecting rod (41) is rotatably connected to a limiting column (39); the bottom end of the limiting column (39) is close to the inner wall of the steel pipe rod body (20).

4. A steel pipe rod welding positioning device according to claim 1, characterized in that: The support column (33) is provided with a notch (32); the top end of the top block (27) is fixedly connected to a fixing rod (28); the fixing rod (28) is L-shaped; a fixing block (29) is fixedly connected to the fixing rod (28); the fixing rod (28) is slidably connected to a guide rod (43); and the guide rod (43) is fixedly connected to the inner wall of the device base (1).

5. A steel pipe rod welding positioning device according to claim 1, characterized in that: The fixing assembly comprises a mounting block (54), the mounting block (54) being fixedly connected to the top end of the column (52), the mounting block (54) being rotatably connected to the rotating block (55), the inner walls of the mounting block (54) and the rotating block (55) being fixedly connected with a gasket (53), the gasket (53) being made of rubber material.

6. A steel pipe rod welding positioning device according to claim 5, characterized in that: The column (52) is slidably connected in the second movable groove (49), the second movable groove (49) is opened at the top of the device base (1), and two groups of cover plates (51) are fixedly connected to the column (52), and the cover plates (51) are in contact with the top of the device base (1).

7. A steel pipe rod welding positioning device according to claim 1, characterized in that: A baffle (47) is fixedly connected to the front end of the grinding device (21), and the baffle (47) is fitted with the top end of the device base (1). Two groups of first movable grooves (48) are provided on the device base (1).

8. A steel pipe rod welding positioning device according to claim 7, characterized in that: The side of the mounting plate (34) abutting against the inner wall of the steel tube rod body (20) is designed to be arc-shaped, and the mounting plate (34) is made of rubber material.

9. A steel pipe rod welding positioning device according to claim 2, characterized in that: A placement groove (38) is provided at the top end of the support plate (59), and a counterweight block (37) is fixedly connected inside the placement groove (38).

10. A steel pipe rod welding positioning device according to claim 1, characterized in that: The inner wall of the bottom plate (31) is provided with a sliding groove (30), the interior of the sliding groove (30) is slidably connected to a sliding block (26), and the sliding block (26) is fixedly connected to two sides of the top block (27).

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