Positioning anti-deviation mechanism for welded pipe welding

Abstract

This invention relates to the field of welded pipe welding positioning technology, and in particular to a positioning and anti-deviation mechanism for welded pipe welding. The mechanism includes a welding plate, with a clamping assembly on the top of the welding plate. The clamping assembly includes a fixed sleeve, with two fixed sleeves fixedly connected to both sides of the top of the welding plate. A first threaded rod is rotatably connected between the two sides of the inner cavity of each fixed sleeve. One end of the first threaded rod passes through the fixed sleeve and extends to the outside of the fixed sleeve. A rotating handle is fixedly connected to the end of the first threaded rod extending to the outside of the fixed sleeve. This invention drives the two threaded sleeves and the clamping plate to move towards or away from each other via the bidirectional first threaded rod in the clamping assembly. Rotating the handle synchronously adjusts the distance between the two clamping plates, allowing for quick adaptation to welded pipes of different diameters. The clamping force is maintained by self-locking through the helix angle of the threaded pair, eliminating the need for manual bolt tightening. The clamping force is uniform and controllable, avoiding damage to the pipe wall caused by rigid clamping. Simultaneously, the bidirectional thread ensures synchronous centering and positioning of the two clamping plates, ensuring that the welded pipe axis coincides with the welding path.

Description

Technical Field

[0001] This invention relates to the field of welded pipe welding positioning technology, and in particular to a positioning and anti-deviation mechanism for welded pipe welding. Background Technology

[0002] During the welding process of welded pipes, two welded pipes need to be joined together and then circumferentially welded. Precise positioning and stable clamping of the pipe fittings during welding are key prerequisites for ensuring the quality of the weld.

[0003] The existing welded pipe positioning and clamping mechanisms have the following main technical problems: First, traditional clamps mostly use fixed V-blocks or arc-shaped clamping surfaces. Different pipe diameters require different clamp specifications, which is cumbersome and inefficient. Moreover, the clamp position needs to be readjusted every time the specification is changed, making it difficult to achieve rapid production changeover. Second, the clamping force of the clamps mostly relies on manually tightening bolts, which makes it difficult to control the clamping force precisely. Over-clamping can easily cause indentations on the pipe wall surface or even cause pipe deformation. Over-clamping can cause axial movement or radial displacement of the pipe under thermal stress and vibration during welding, resulting in weld misalignment, welding defects, or even scrap. Third, the existing clamping plates and clamping drive mechanisms are mostly integrated welded or bolted structures. When the clamping plates are worn, multiple fasteners need to be disassembled for replacement, making maintenance inconvenient. In addition, there is a lack of automatic welding guidance function during the welding process. Operators need to move the welding torch along the weld seam by hand, which is labor-intensive, results in uneven welding speed, and affects the weld formation quality. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a positioning and anti-deviation mechanism for welded pipe welding.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a positioning and anti-deviation mechanism for welding pipes, comprising a welding plate, a clamping assembly provided on the top of the welding plate, the clamping assembly comprising a fixing sleeve, two fixing sleeves fixedly connected to both sides of the top of the welding plate, a first threaded rod rotatably connected between the two sides of the inner cavity of the fixing sleeve, one end of the first threaded rod penetrating the fixing sleeve and extending to the outside of the fixing sleeve, a rotating handle fixedly connected to the end of the first threaded rod extending to the outside of the fixing sleeve, two threaded sleeves threadedly connected to the surface of the first threaded rod, and a clamping plate provided on the surface of the threaded sleeve.

[0006] As a preferred embodiment of the present invention, the first threaded rod is a bidirectional threaded rod, and the two threaded sleeves are respectively threaded onto the two reverse threads of the first threaded rod. When the first threaded rod is rotated, the two threaded sleeves move towards or away from each other.

[0007] As a preferred embodiment of the present invention, a limiting component is provided on the top of the welding plate. The limiting component includes a first sliding groove, which is opened on both sides of the top of the welding plate. A first slider is slidably connected inside the first sliding groove, and the side of the first slider near the clamping plate is fixedly connected to the clamping plate.

[0008] As a preferred embodiment of the present invention, the surface of the threaded sleeve is provided with a replacement component, the replacement component including a device groove and a limiting port, the device groove is opened on both sides of the inner cavity of the clamping plate, a first spring is fixedly connected to the side of the two device grooves that are close to each other, and a limiting block is fixedly connected to the side of the two first springs that are opposite to each other, the limiting port is opened on both sides of the threaded sleeve, and the limiting block is inserted into the inside of the limiting port to fix the clamping plate.

[0009] As a preferred embodiment of the present invention, the clamping plate is provided with several different shapes to adapt to welded pipes of different shapes.

[0010] As a preferred embodiment of the present invention, a fixing component is provided on both sides of the inner cavity of the first slide groove. The fixing component includes a fixing port and a fixing groove. A plurality of fixing ports are opened on both sides of the inner cavity of the first slide groove, and the fixing groove is opened on both sides of the first slider. A second spring is fixedly connected to the side of two adjacent fixing grooves, and a fixing block that cooperates with the fixing port is fixedly connected to the side of two opposing second springs.

[0011] As a preferred embodiment of the present invention, welding components are provided on both sides of the welding plate. The welding components include a welding frame, which is fixedly connected to both sides of the welding plate. A second threaded rod is rotatably connected between the two sides of the inner cavity of the welding frame. A second threaded sleeve is threadedly connected to the surface of the second threaded rod, and a welding head is fixedly connected to the bottom of the second threaded sleeve.

[0012] As a preferred embodiment of the present invention, one end of the second threaded rod passes through the welding frame and extends to the outside of the welding frame. A motor housing is fixedly connected to one side of the outside of the welding frame, and a motor is fixedly connected inside the motor housing. One end of the second threaded rod passes through the motor housing and extends to the inside of the motor housing. The end of the second threaded rod extending into the motor housing is fixedly connected to the output shaft of the motor. A second sliding groove is provided at the bottom of the inner cavity of the welding frame. A second slider is slidably connected inside the second sliding groove. The side of the second slider near the second threaded sleeve is fixedly connected to the second threaded sleeve.

[0013] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. This invention drives two threaded sleeves and clamping plates to move towards or away from each other through a bidirectional first threaded rod in the clamping assembly. The distance between the two clamping plates can be adjusted synchronously by rotating the handle, which can quickly adapt to welded pipes of different diameters. The clamping force is maintained by the self-locking helix angle of the threaded pair, eliminating the need for manual tightening of bolts. The clamping force is uniform and controllable, avoiding damage to the pipe wall caused by rigid clamping. At the same time, the bidirectional thread ensures the synchronous centering and positioning of the two clamping plates, ensuring that the welded pipe axis coincides with the welding path.

[0014] 2. This invention automatically engages the limiting block driven by the first spring in the component by replacing it, enabling the clamping plate and the threaded sleeve to achieve quick locking and unlocking by pressing. Pressing the limiting block removes the clamping plate from the threaded sleeve, and after inserting a new clamping plate, the limiting block automatically engages and locks. The clamping plate can be replaced without any tools. The clamping plate is available in various shapes such as V-shaped, arc-shaped, and flat, allowing for quick replacement of the corresponding clamping plate according to the cross-sectional shape of the welded pipe, significantly shortening the changeover time.

[0015] 3. In this invention, the first slider in the limiting component slides along the first groove, which guides and supports the clamping plate, ensuring that the clamping plate moves smoothly and without deviation. At the same time, the fixing block driven by the second spring in the fixing component automatically engages with the fixing port, locking the first slider in the adjusted position, preventing the clamping plate from loosening due to welding vibration, and further improving the stability of clamping and the reliability of welding.

[0016] 4. This invention uses a motor in the welding assembly to drive the second threaded rod to rotate, which in turn drives the second threaded sleeve and the welding head to move at a constant speed along the axial direction of the welded pipe. The second slider slides along the second groove to guide the welding head to move smoothly and without deviation, thus realizing automatic and uniform welding of the butt weld. The welding speed is uniform and controllable, avoiding the instability factors of manual hand-held welding gun operation. The welding head completes the continuous welding of the entire circumferential weld during the movement, which significantly improves the welding efficiency and weld formation quality.

[0017] 5. This invention integrates the clamping and positioning component with the automatic welding component on the same welding plate. After clamping, welding can be performed directly without moving the welded pipe, avoiding the accumulation of errors from secondary clamping and alignment. The linkage between bidirectional threaded clamping, quick-change clamping plate, elastic locking and automatic welding realizes full automation from clamping and positioning to welding completion, significantly improving the processing accuracy and production efficiency of welded pipe welding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the welding plate of the present invention; Figure 2 This is a schematic diagram of the structure of the clamping plate of the present invention; Figure 3 This is a schematic diagram of the structure of the groove in the device of the present invention; Figure 4 This is a schematic diagram of the fixing groove of the present invention; Figure 5 This is a schematic diagram of the fixing port structure of the present invention; Figure 6 This is a schematic diagram of the welding frame of the present invention; Figure 7 This is a schematic diagram of the structure of the second slide groove of the present invention.

[0019] Among them: 1. Welding plate; 20. Fixing sleeve; 21. First threaded rod; 22. Rotating handle; 23. Threaded sleeve; 24. Clamping plate; 30. First groove; 31. First slider; 40. Device slot; 41. Limiting port; 42. First spring; 43. Limiting block; 50. Fixing port; 51. Fixing groove; 52. Second spring; 53. Fixing block; 60. Welding frame; 61. Second threaded rod; 62. Second threaded sleeve; 63. Welding head; 70. Motor housing; 71. Motor; 72. Second slide rail; 73. Second slider. Detailed Implementation

[0020] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0021] Example: Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, a positioning and anti-deviation mechanism for welded pipe includes a welding plate 1. A clamping assembly is provided on the top of the welding plate 1. The clamping assembly includes a fixing sleeve 20. Two fixing sleeves 20 are fixedly connected to both sides of the top of the welding plate 1. A first threaded rod 21 is rotatably connected between the two sides of the inner cavity of each fixing sleeve 20. One end of the first threaded rod 21 passes through the fixing sleeve 20 and extends to the outside of the fixing sleeve 20. A rotating handle 22 is fixedly connected to the end of the first threaded rod 21 extending to the outside of the fixing sleeve 20. Two threaded sleeves 23 are threadedly connected to the surface of the first threaded rod 21. A clamping plate 24 is provided on the surface of each threaded sleeve 23. The first threaded rod 21 is a bidirectional threaded rod. The two threaded sleeves 23 are respectively threadedly connected to two reverse threads of the first threaded rod 21. Rotating the first threaded rod 21... When the two threaded sleeves 23 move towards or away from each other, a limiting component is provided on the top of the welding plate 1. The limiting component includes a first sliding groove 30, which is opened on both sides of the top of the welding plate 1. A first slider 31 is slidably connected inside the first sliding groove 30. The side of the first slider 31 near the clamping plate 24 is fixedly connected to the clamping plate 24. A fixing component is provided on both sides of the inner cavity of the first sliding groove 30. The fixing component includes a fixing port 50 and a fixing groove 51. Several fixing ports 50 are opened on both sides of the inner cavity of the first sliding groove 30. The fixing grooves 51 are opened on both sides of the first slider 31. A second spring 52 is fixedly connected on the side of the two fixing grooves 51 that are close to each other. A fixing block 53 that cooperates with the fixing port 50 is fixedly connected on the side of the two second springs 52 that are away from each other.

[0022] refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, two pipes to be welded are placed on top of the welding plate 1, with the butt weld seam located at the center of the welding plate 1. The two pipes are respectively located between two clamping plates 24. The operator turns the handle 22, and the first threaded rod 21 rotates. Since the first threaded rod 21 is a bidirectional threaded rod, the two threaded sleeves 23 move synchronously towards each other along the first threaded rod 21. The first slider 31 slides along the first groove 30 for guidance. The clamping plates 24 move towards the pipes from both sides at the same time until the inner side of the clamping plates 24 is tightly fitted with the outer wall of the pipes, clamping and centering the two pipes. After clamping, the fixing block 53 on the first slider 31 is engaged in the corresponding fixing port 50 under the action of the second spring 52, locking the first slider 31 in the first groove 30 to prevent the clamping plates 24 from loosening due to welding vibration.

[0023] refer to Figure 2 and Figure 3As shown, the surface of the threaded sleeve 23 is provided with a replacement component, which includes a device groove 40 and a limiting port 41. The device groove 40 is opened on both sides of the inner cavity of the clamping plate 24. A first spring 42 is fixedly connected to the side of the two device grooves 40 that are close to each other, and a limiting block 43 is fixedly connected to the side of the two first springs 42 that are opposite to each other. The limiting port 41 is opened on both sides of the threaded sleeve 23. The limiting block 43 is inserted into the inside of the limiting port 41 to fix the clamping plate 24. The clamping plate 24 is provided with several different shapes to adapt to welded pipes of different shapes.

[0024] refer to Figure 2 and Figure 3 As shown, when welding pipes of different diameters or cross-sectional shapes are required, the operator presses the limiting block 43 to compress the first spring 42 and remove it from the limiting port 41. The clamping plate 24 is then removed from the threaded sleeve 23. The corresponding clamping plate 24 is selected and placed on the threaded sleeve 23. Under the action of the first spring 42, the limiting block 43 automatically engages with the limiting port 41 and locks, completing the quick replacement of the clamping plate. Clamping plates of different shapes can be adapted to welded pipes with different cross-sections, such as round pipes, square pipes, and irregular-shaped pipes.

[0025] refer to Figure 1 , Figure 6 and Figure 7 As shown, welding assemblies are provided on both sides of the welding plate 1. The welding assemblies include a welding frame 60, which is fixedly connected to both sides of the welding plate 1. A second threaded rod 61 is rotatably connected between the two sides of the inner cavity of the welding frame 60. A second threaded sleeve 62 is threadedly connected to the surface of the second threaded rod 61. A welding head 63 is fixedly connected to the bottom of the second threaded sleeve 62. One end of the second threaded rod 61 passes through the welding frame 60 and extends to the outside of the welding frame 60. A motor housing 70 is fixedly connected to one side of the outside of the welding frame 60. A motor 71 is fixedly connected inside the motor housing 70. One end of the second threaded rod 61 passes through the motor housing 70 and extends to the inside of the motor housing 70. The end of the second threaded rod 61 extending into the motor housing 70 is fixedly connected to the output shaft of the motor 71. A second sliding groove 72 is provided at the bottom of the inner cavity of the welding frame 60. A second slider 73 is slidably connected inside the second sliding groove 72. The side of the second slider 73 near the second threaded sleeve 62 is fixedly connected to the second threaded sleeve 62.

[0026] refer to Figure 1 , Figure 6 and Figure 7As shown, after the welded pipe is clamped and positioned and the clamping plate is replaced, the motor 71 is started. The motor 71 drives the second threaded rod 61 to rotate, the second threaded sleeve 62 moves axially along the second threaded rod 61, the second slider 73 slides and guides along the second slide groove 72, and the welding head 63 moves at a constant speed along the welded pipe joint direction with the second threaded sleeve 62 to automatically weld the joint. During the welding process, the clamping plate 24 always remains clamped, the welded pipe does not shift or deviate, and the welding head 63 moves at a constant speed to ensure that the weld is uniform.

[0027] Working principle: Before use: Refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, welding plate 1 is fixed in the working position. In the clamping assembly, the first threaded rod 21 is in the initial position, the two threaded sleeves 23 are far apart from each other, and clamping plate 24 is open. In the limiting assembly, the first slider 31 is located in the initial position of the first slide groove 30. In the replacement assembly, the limiting block 43 extends out of the device groove 40 under the action of the first spring 42 and inserts into the limiting port 41 to fix the clamping plate 24 on the threaded sleeve 23. In the fixing assembly, the fixing block 53 extends out of the fixing groove 51 under the action of the second spring 52. In the welding assembly, the second threaded sleeve 62 is located at one end of the second threaded rod 61, the welding head 63 is in the initial position, the motor 71 is ready to start, and the welded pipe to be welded is ready to be placed.

[0028] When using: Refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, two pipes to be welded are placed on top of the welding plate 1, with the butt weld seam located at the center of the welding plate 1. The two pipes are respectively located between two clamping plates 24. The operator turns the handle 22, and the first threaded rod 21 rotates. Since the first threaded rod 21 is a bidirectional threaded rod, the two threaded sleeves 23 move synchronously towards each other along the first threaded rod 21. The first slider 31 slides along the first groove 30 for guidance. The clamping plates 24 move towards the pipes from both sides at the same time until the inner side of the clamping plates 24 is tightly fitted with the outer wall of the pipes, clamping and centering the two pipes. After clamping, the fixing block 53 on the first slider 31 is engaged in the corresponding fixing port 50 under the action of the second spring 52, locking the first slider 31 in the first groove 30 to prevent the clamping plates 24 from loosening due to welding vibration.

[0029] refer to Figure 2 and Figure 3As shown, when welding pipes of different diameters or cross-sectional shapes are required, the operator presses the limiting block 43 to compress the first spring 42 and remove it from the limiting port 41. The clamping plate 24 is then removed from the threaded sleeve 23. The corresponding clamping plate 24 is selected and placed on the threaded sleeve 23. Under the action of the first spring 42, the limiting block 43 automatically engages with the limiting port 41 and locks, completing the quick replacement of the clamping plate. Clamping plates of different shapes can be adapted to welded pipes with different cross-sections, such as round pipes, square pipes, and irregular-shaped pipes.

[0030] refer to Figure 1 , Figure 6 and Figure 7 As shown, after the welded pipe is clamped and positioned and the clamping plate is replaced, the motor 71 is started. The motor 71 drives the second threaded rod 61 to rotate, the second threaded sleeve 62 moves axially along the second threaded rod 61, the second slider 73 slides and guides along the second slide groove 72, and the welding head 63 moves at a constant speed along the welded pipe joint direction with the second threaded sleeve 62 to automatically weld the joint. During the welding process, the clamping plate 24 always remains clamped, the welded pipe does not shift or deviate, and the welding head 63 moves at a constant speed to ensure that the weld is uniform.

[0031] After use: Reference Figure 1 and Figure 7 As shown, welding is completed. Motor 71 is turned off, welding head 63 stops moving, rotating handle 22 in the opposite direction causes the two threaded sleeves 23 to move in opposite directions, clamping plate 24 releases the welded pipe, the welded pipe is taken out, all springs return to their original positions, and the device is ready for use.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A positioning and anti-deviation mechanism for welded pipes, comprising a welding plate (1), characterized in that, The top of the welding plate (1) is provided with a clamping assembly, which includes a fixing sleeve (20). Two fixing sleeves (20) are fixedly connected to the two sides of the top of the welding plate (1). A first threaded rod (21) is rotatably connected between the two sides of the inner cavity of the fixing sleeve (20). One end of the first threaded rod (21) passes through the fixing sleeve (20) and extends to the outside of the fixing sleeve (20). A rotating handle (22) is fixedly connected to the end of the first threaded rod (21) extending to the outside of the fixing sleeve (20). Two threaded sleeves (23) are threadedly connected to the surface of the first threaded rod (21). A clamping plate (24) is provided on the surface of the threaded sleeve (23).

2. The positioning and anti-deviation mechanism for welded pipes according to claim 1, characterized in that, The first threaded rod (21) is a bidirectional threaded rod, and the two threaded sleeves (23) are respectively threaded to the two reverse threads of the first threaded rod (21). When the first threaded rod (21) is rotated, the two threaded sleeves (23) move towards or away from each other.

3. The positioning and anti-deviation mechanism for welded pipes according to claim 1, characterized in that, The welding plate (1) is provided with a limiting component on its top. The limiting component includes a first slide groove (30). The first slide groove (30) is opened on both sides of the top of the welding plate (1). A first slider (31) is slidably connected inside the first slide groove (30). The side of the first slider (31) near the clamping plate (24) is fixedly connected to the clamping plate (24).

4. The positioning and anti-deviation mechanism for welded pipes according to claim 1, characterized in that, The surface of the threaded sleeve (23) is provided with a replacement component, which includes a device groove (40) and a limiting port (41). The device groove (40) is opened on both sides of the inner cavity of the clamping plate (24). A first spring (42) is fixedly connected to the side of the two device grooves (40) that are close to each other. A limiting block (43) is fixedly connected to the side of the two first springs (42) that are opposite to each other. The limiting port (41) is opened on both sides of the threaded sleeve (23). The limiting block (43) is inserted into the inside of the limiting port (41) to fix the clamping plate (24).

5. The positioning and anti-deviation mechanism for welded pipes according to claim 4, characterized in that, The clamping plate (24) is provided with several different shapes to adapt to welded pipes of different shapes.

6. The positioning and anti-deviation mechanism for welded pipes according to claim 3, characterized in that, Fixing components are provided on both sides of the inner cavity of the first slide groove (30). The fixing components include fixing ports (50) and fixing grooves (51). Several fixing ports (50) are opened on both sides of the inner cavity of the first slide groove (30). The fixing grooves (51) are opened on both sides of the first slider (31). A second spring (52) is fixedly connected to the side of the two fixing grooves (51) that are close to each other. A fixing block (53) that cooperates with the fixing port (50) is fixedly connected to the side of the two second springs (52) that are opposite to each other.

7. The positioning and anti-deviation mechanism for welded pipes according to claim 1, characterized in that, Welding components are provided on both sides of the welding plate (1). The welding components include a welding frame (60), which is fixedly connected to both sides of the welding plate (1). A second threaded rod (61) is rotatably connected between the two sides of the inner cavity of the welding frame (60). A second threaded sleeve (62) is threadedly connected to the surface of the second threaded rod (61), and a welding head (63) is fixedly connected to the bottom of the second threaded sleeve (62).

8. The positioning and anti-deviation mechanism for welded pipes according to claim 7, characterized in that, One end of the second threaded rod (61) passes through the welding frame (60) and extends to the outside of the welding frame (60). A motor housing (70) is fixedly connected to one side of the outside of the welding frame (60). A motor (71) is fixedly connected inside the motor housing (70). One end of the second threaded rod (61) passes through the motor housing (70) and extends to the inside of the motor housing (70). The end of the second threaded rod (61) extending into the motor housing (70) is fixedly connected to the output shaft of the motor (71). A second sliding groove (72) is provided at the bottom of the inner cavity of the welding frame (60). A second slider (73) is slidably connected inside the second sliding groove (72). The side of the second slider (73) near the second threaded sleeve (62) is fixedly connected to the second threaded sleeve (62).

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