An automatic welding device for the inner ring of a pipe

Abstract

The present invention discloses an automatic welding device for the inner circle of a pipe, which relates to the technical field of pipe welding. It includes an operating table and a pipe body. A control panel, two pipe clamping devices, and an angle adjusting device are fixedly installed on the upper surface of the operating table. The control panel is located in front of the angle adjusting device, and the pipe body is movably inserted into the interiors of the two pipe clamping devices. By setting the pipe clamping device, the first motor drives the movable roller to move circuitously inside the connecting sleeve, so that the connecting sleeve drives the lower clamping plate to move up and down, prompting the two clamping plates to clamp the pipe body mutually, enabling the clamping device to adjust for pipes with different diameters, thereby positioning and clamping the pipes to be spliced and aligning the calibers before welding work, avoiding the manual alignment method, thus improving the precision of pipe welding and ensuring the complete positioning of the welded part of the pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe welding, and particularly to an automatic welding device for the inner circle of pipes. Background Art

[0002] Pipe welding, also known as welded pipe, is made by welding steel plates or strips after curling and forming. In the production process, its basic principle is that after gradually turning and forming the steel plate or strip through multiple forming dies, it is then welded by a welding machine. After welding, the welded pipe still needs to go through cooling, grinding, and cutting to obtain the finished product.

[0003] In the prior art, for the welding of pipes, due to the irregular sizes and shapes of the welded parts, it is difficult to achieve precise alignment of the calibers. Generally, manual welding is used, but manual welding has the following problems: low work efficiency, high labor cost, and the gas generated during the welding process is toxic and has side effects on the human body; in addition, for the products welded manually, it is impossible to ensure that the welded parts of the two pipes are completely in place, and often problems such as false welding occur, resulting in the products after welding not meeting the requirements. Summary of the Invention

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides an automatic welding device for the inner circle of pipes to solve the problems raised in the above background art.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: an automatic welding device for the inner circle of pipes, including an operation table and a pipe body. A control panel, two pipe clamping devices, and an angle adjustment device are fixedly installed on the upper surface of the operation table. The control panel is located in front of the angle adjustment device. The pipe body is movably inserted into the interiors of both pipe clamping devices. The angle adjustment device is located on the left side of the pipe clamping devices, and an extension device is fixedly connected to the top of the angle adjustment device.

[0008] As a preferred technical solution of the present invention, the pipe clamping device includes a support plate. A driving cavity and a clamping port are formed inside the support plate. A first motor is fixedly installed on the inner wall of the driving cavity. A rotating rod is fixedly sleeved on the output shaft of the first motor. One end of the rotating rod away from the first motor is rotatably connected to a movable roller. A connecting sleeve is movably sleeved on the surface of the movable roller. Two support rods are fixedly connected to the top of the connecting sleeve. The tops of both support rods extend into the interior of the clamping port and are fixedly connected to a lower clamping plate. An upper clamping plate is fixedly installed on the top inner wall of the clamping port. The pipe body is placed between the upper clamping plate and the lower clamping plate, and the opposite ends of the two pipe bodies are in contact.

[0009] As a preferred technical solution of the present invention, limit blocks are fixedly connected to both the front end and the back end of the connecting sleeve. Two limit grooves are formed in the inner wall of the driving cavity, and one end of the limit block away from the connecting sleeve extends into the interior of the limit groove.

[0010] As a preferred technical solution of the present invention, the angle adjustment device includes a second motor. An adjustment cavity is formed inside the operation table. The second motor is fixedly installed at the bottom of the inner wall of the adjustment cavity. A rotating shaft is rotatably connected to the bottom of the inner wall of the adjustment cavity. The output shaft of the second motor is in transmission connection with the rotating shaft through a transmission belt. The top end of the rotating shaft extends above the operation table and is fixedly connected to a turntable. A connecting rod is fixedly connected to the top end of the turntable. The top end of the connecting rod is fixedly connected to an extension device.

[0011] As a preferred technical solution of the present invention, two rollers are rotatably connected to the bottom of the turntable. An annular groove is formed on the upper surface of the operation table, and the bottom of the roller abuts against the bottom of the inner wall of the annular groove.

[0012] As a preferred technical solution of the present invention, the extension device includes a storage plate. The right side surface of the storage plate is fixedly connected to the top end of the connecting rod. A storage cavity is formed inside the storage plate. A third motor is fixedly installed on the inner wall of the storage cavity. The output shaft of the third motor is fixedly connected to a movable rod. A movable plate is threadedly connected to the surface of the movable rod. An external sleeve is fixedly installed on the front surface of the movable plate. The external sleeve is located outside the movable rod. An installation groove is formed on the front surface of the external sleeve. A fourth motor is fixedly installed on the inner wall of the installation groove. The output shaft of the fourth motor is fixedly installed with a welding head. A camera is fixedly installed on the front surface of the welding head.

[0013] As a preferred technical solution of the present invention, pulleys are fixedly connected to both the top and the bottom of the movable plate. Sliding grooves are formed on both the top and the bottom of the inner wall of the storage cavity. One end of the pulley away from the movable plate extends into the interior of the sliding groove.

[0014] As a preferred technical solution of the present invention, the output end of the control panel is electrically connected to the input ends of the first motor, the second motor, the third motor, the fourth motor, the welding head, and the camera respectively.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present invention provides an automatic welding device for the inner circle of a pipe, which has the following beneficial effects:

[0017] 1. The automatic welding device for the inner circle of the pipe sets up a pipe clamping device. By driving the movable roller to move circuitously inside the connecting sleeve with the first motor, the connecting sleeve drives the lower clamping plate to move up and down, enabling the two clamping plates to clamp the pipe body mutually. This allows the clamping device to be adjusted for pipes with different diameters, so as to position and clamp the pipes to be spliced and align their calibers before welding work, avoiding the manual alignment method, thus improving the precision of pipe welding and ensuring the complete positioning of the welded part of the pipe.

[0018] 2. The automatic welding device for the inner circle of the pipe sets up an angle adjustment device and an extension device. By driving the connecting rod to rotate horizontally with the second motor and driving the welding head to displace horizontally with the third motor, the welding head extends into the opening of the clamped pipe and performs the inner circle welding work through the camera, thus avoiding the manual welding method in the prior art and preventing a large amount of gas generated during welding from coming into contact with the human body, thereby ensuring the personal safety of the welding personnel. Brief Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of an automatic welding device for the inner circle of a pipe proposed by the present invention;

[0020] Figure 2 It is a schematic structural diagram of the pipe clamping device of an automatic welding device for the inner circle of a pipe proposed by the present invention;

[0021] Figure 3 It is a schematic structural diagram of the angle adjustment device of an automatic welding device for the inner circle of a pipe proposed by the present invention;

[0022] Figure 4 It is a schematic structural diagram of the extension device of an automatic welding device for the inner circle of a pipe proposed by the present invention.

[0023] In the figure: 1, operating table; 2, control panel; 3, pipe body; 4, pipe clamping device; 5, support plate; 6, drive cavity; 7, first motor; 8, rotating rod; 9, movable roller; 10, connecting sleeve; 11, limiting groove; 12, limiting block; 13, support rod; 14, lower clamping plate; 15, clamping opening; 16, upper clamping plate; 17, angle adjustment device; 18, adjustment cavity; 19, second motor; 20, rotating shaft; 21, transmission belt; 22, turntable; 23, roller; 24, connecting rod; 25, extension device; 26, storage plate; 27, storage cavity; 28, third motor; 29, movable rod; 30, movable plate; 31, pulley; 32, sliding groove; 33, external sleeve; 34, installation groove; 35, fourth motor; 36, welding head; 37, camera. Detailed Embodiment

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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 shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-4 , an automatic welding device for the inner circle of a pipe, including an operation table 1 and a pipe body 3. A control panel 2, two pipe clamping devices 4, and an angle adjustment device 17 are fixedly installed on the upper surface of the operation table 1. The control panel 2 is located on the front side of the angle adjustment device 17. The pipe body 3 is movably inserted into the interiors of both pipe clamping devices 4. The angle adjustment device 17 is located on the left side of the pipe clamping devices 4. An extension device 25 is fixedly connected to the top of the angle adjustment device 17. By setting the angle adjustment device 17 and the extension device 25, the second motor 19 drives the connecting rod 24 to rotate horizontally and cooperate with the third motor 28 to drive the welding head 36 to displace horizontally, so that the welding head 36 extends to the inside of the opening of the clamped pipe and the inner circle welding work is carried out through the camera 37. Thus, the manual welding method in the prior art is avoided, and the gas generated during the welding process will not come into contact with the human body in large quantities, thereby ensuring the personal safety of the welding personnel.

[0026] As a specific technical solution of this embodiment, the pipe clamping device 4 includes a support plate 5. A drive cavity 6 and a clamping port 15 are formed inside the support plate 5. A first motor 7 is fixedly installed on the inner wall of the drive cavity 6. The output shaft of the first motor 7 is fixedly sleeved with a rotating rod 8. One end of the rotating rod 8 away from the first motor 7 is rotatably connected to a movable roller 9. A connecting sleeve 10 is movably sleeved on the surface of the movable roller 9. Two support rods 13 are fixedly connected to the top of the connecting sleeve 10. The tops of both support rods 13 extend into the clamping port 15 and are fixedly connected to a lower clamping plate 14. An upper clamping plate 16 is fixedly installed on the top inner wall of the clamping port 15. The pipe body 3 is placed between the upper clamping plate 16 and the lower clamping plate 14, and the opposite ends of the two pipe bodies 3 are in contact.

[0027] In this embodiment, for the automatic welding device for the inner circle of the pipe, by setting the pipe clamping device 4, the first motor 7 drives the movable roller 9 to move circuitously inside the connecting sleeve 10, so that the connecting sleeve 10 drives the lower clamping plate 14 to move up and down, prompting the two clamping plates to clamp the pipe body 3 against each other, enabling the clamping device to adjust for pipes with different diameters, thereby positioning and clamping the pipes to be spliced and aligning their calibers before welding work, avoiding the use of manual alignment methods, thus improving the precision of pipe welding and ensuring the complete alignment of the welded part of the pipe.

[0028] As a specific technical solution of this embodiment, limit blocks 12 are fixedly connected to the front end and the back end of the connecting sleeve 10, two limit grooves 11 are formed in the inner wall of the driving cavity 6, and one end of the limit block 12 away from the connecting sleeve 10 extends into the limit groove 11.

[0029] In this embodiment, the limit block 12 moves along the direction of the limit groove 11 together with the connecting sleeve 10, thereby improving the moving stability of the connecting sleeve 10.

[0030] As a specific technical solution of this embodiment, the angle adjusting device 17 includes a second motor 19. An adjusting cavity 18 is formed inside the operating table 1. The second motor 19 is fixedly installed at the bottom of the inner wall of the adjusting cavity 18. A rotating shaft 20 is rotatably connected to the bottom of the inner wall of the adjusting cavity 18. The output shaft of the second motor 19 is in transmission connection with the rotating shaft 20 through a transmission belt 21. The top end of the rotating shaft 20 extends above the operating table 1 and is fixedly connected to a turntable 22. The top end of the turntable 22 is fixedly connected to a connecting rod 24, and the top end of the connecting rod 24 is fixedly connected to an extending device 25.

[0031] In this embodiment, when the angle adjusting device 17 is started, the second motor 19 drives the rotating shaft 20 to rotate through the transmission belt 21, prompting the turntable 22 to drive the connecting rod 24 to rotate, so that the connecting rod 24 drives the extending device 25 to finally rotate to the left end of the left pipe body 3.

[0032] As a specific technical solution of this embodiment, two rollers 23 are rotatably connected to the bottom of the turntable 22. An annular groove is formed on the upper surface of the operating table 1, and the bottom of the roller 23 abuts against the bottom of the inner wall of the annular groove.

[0033] In this embodiment, the roller 23 slides along the annular groove together with the turntable 22, thereby improving the rotating stability of the turntable 22.

[0034] As a specific technical solution of this embodiment, the extension device 25 includes a storage plate 26. The right side surface of the storage plate 26 is fixedly connected to the top end of the connecting rod 24. An accommodation cavity 27 is formed inside the storage plate 26. A third motor 28 is fixedly installed on the inner wall of the accommodation cavity 27. The output shaft of the third motor 28 is fixedly connected to a movable rod 29. A movable plate 30 is threadedly connected to the surface of the movable rod 29. A connecting sleeve 33 is fixedly installed on the front surface of the movable plate 30. The connecting sleeve 33 is located outside the movable rod 29. An installation groove 34 is formed on the front surface of the connecting sleeve 33. A fourth motor 35 is fixedly installed on the inner wall of the installation groove 34. The output shaft of the fourth motor 35 is fixedly installed with a welding head 36. A camera 37 is fixedly installed on the front surface of the welding head 36.

[0035] In this implementation scheme, when the extension device 25 is started, the third motor 28 drives the movable rod 29 to rotate. Since the movable rod 29 is threadedly connected to the movable plate 30, the movable plate 30 is displaced along the direction of the movable rod 29, prompting the movable plate 30 to drive the connecting sleeve 33 to slide, so that the connecting sleeve 33 gradually extends out of the storage plate 26 and is inserted into the left pipe body 3.

[0036] As a specific technical solution of this embodiment, pulleys 31 are fixedly connected to both the top and bottom of the movable plate 30. Sliding grooves 32 are formed on both the top and bottom of the inner wall of the accommodation cavity 27. One end of the pulley 31 away from the movable plate 30 extends into the sliding groove 32.

[0037] In this implementation scheme, the pulley 31 moves along the sliding groove 32 together with the movable plate 30, thereby improving the moving stability of the movable plate 30.

[0038] As a specific technical solution of this embodiment, the output end of the control panel 2 is electrically connected to the input ends of the first motor 7, the second motor 19, the third motor 28, the fourth motor 35, the welding head 36, and the camera 37 respectively.

[0039] In this implementation scheme, the camera 37 is used to observe the connection part of the inner circles of the two pipe bodies 3. When the welding head 36 reaches the connection part, the welding head 36 and the fourth motor 35 are started by an external power source to drive the welding head 36 to rotate, so that the welding head 36 automatically welds the connection part of the inner circles of the two pipe bodies 3.

[0040] The working principle and usage process of the present invention:

[0041] During use, the two pipe bodies 3 to be welded are successively brought into contact with the two pipe clamping devices 4. First, place the pipe body 3 inside the clamping opening 15 formed inside the support plate 5, and the pipe body 3 is located between the upper clamping plate 16 and the lower clamping plate 14 and the diameters of the two pipe bodies 3 are aligned. Start the first motor 7, and the first motor 7 drives the rotating rod 8 to rotate, causing the rotating rod 8 to drive the movable roller 9 to slide along the inside of the connecting sleeve 10, so that the connecting sleeve 10 makes a lifting movement driven by the movable roller 9, causing the lower clamping plate 14 to drive the pipe body 3 to gradually contact the upper clamping plate 16, so that the pipe body 3 is finally positioned and clamped between the upper clamping plate 16 and the lower clamping plate 14, and at this time the connection between the two pipe bodies 3 is fixed; start the angle adjustment device 17, the second motor 19 drives the rotating shaft 20 to rotate through the transmission belt 21, causing the turntable 22 to drive the connecting rod 24 to rotate, so that the connecting rod 24 drives the extension device 25 to finally rotate to the left end of the left pipe body 3; start the extension device 25, the third motor 28 drives the movable rod 29 to rotate, and because the movable rod 29 is threadedly connected to the movable plate 30, the movable plate 30 makes a displacement along the direction of the movable rod 29, causing the movable plate 30 to drive the external sleeve 33 to slide, so that the external sleeve 33 gradually extends out of the storage plate 26 and inserts into the inside of the left pipe body 3. Use the camera 37 to observe the connection at the inner circle of the two pipe bodies 3. When the welding head 36 reaches the connection, use an external power source to start the welding head 36 and the fourth motor 35 to drive the welding head 36 to rotate, so that the welding head 36 automatically welds the connection at the inner circle of the two pipe bodies 3.

[0042] In summary, for this automatic inner circle welding device for pipes, by setting the pipe clamping device 4, the first motor 7 is used to drive the movable roller 9 to make a circuitous movement inside the connecting sleeve 10, so that the connecting sleeve 10 drives the lower clamping plate 14 to make a lifting movement, enabling the two clamping plates to clamp the pipe body 3 against each other, so that the clamping device can be adjusted for pipes of different diameters, thereby positioning and clamping the pipes to be spliced and aligning their diameters before welding work, avoiding the use of manual alignment, thus improving the accuracy of pipe welding and ensuring the complete positioning of the welded part of the pipe; by setting the angle adjustment device 17 and the extension device 25, the second motor 19 is used to drive the connecting rod 24 to rotate in the horizontal direction and cooperate with the third motor 28 to drive the welding head 36 to make a horizontal displacement, so that the welding head 36 extends into the inside of the opening of the clamped pipe and performs inner circle welding work through the camera 37, thus avoiding the use of manual welding in the prior art, so that the gas generated during the welding process will not come into extensive contact with the human body, thereby ensuring the personal safety of the welding personnel.

[0043] It should be noted that in this text, terms such as "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including said element.

[0044] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for the inner circle of a pipe, comprising an operating table (1) and a pipe body (3), characterized in that: The upper surface of the operation table (1) is fixedly installed with a control panel (2), two pipe clamping devices (4), and an angle adjustment device (17). The control panel (2) is located on the front side of the angle adjustment device (17). The pipe body (3) is movably inserted into the interiors of the two pipe clamping devices (4). The angle adjustment device (17) is located on the left side of the pipe clamping devices (4). The top of the angle adjustment device (17) is fixedly connected with an extension device (25). The pipe clamping device (4) includes a support plate (5). A drive cavity (6) and a clamping opening (15) are formed inside the support plate (5). A first motor (7) is fixedly installed on the inner wall of the drive cavity (6). A rotating rod (8) is fixedly sleeved on the output shaft of the first motor (7). One end of the rotating rod (8) far from the first motor (7) is rotatably connected with a movable roller (9). A connecting sleeve (10) is movably sleeved on the surface of the movable roller (9). Two support rods (13) are fixedly connected to the top of the connecting sleeve (10). The tops of the two support rods (13) both extend into the interior of the clamping opening (15) and are fixedly connected with a lower clamping plate (14). An upper clamping plate (16) is fixedly installed on the top of the inner wall of the clamping opening (15). A pipe body (3) is placed between the upper clamping plate (16) and the lower clamping plate (14). The opposite ends of the two pipe bodies (3) are in contact with each other. The angle adjustment device (17) includes a second motor (19). An adjustment cavity (18) is formed inside the operation table (1). The second motor (19) is fixedly installed on the bottom of the inner wall of the adjustment cavity (18). A rotating shaft (20) is rotatably connected to the bottom of the inner wall of the adjustment cavity (18). The output shaft of the second motor (19) is in transmission connection with the rotating shaft (20) through a transmission belt (21). The top of the rotating shaft (20) extends above the operation table (1) and is fixedly connected with a turntable (22). A connecting rod (24) is fixedly connected to the top of the turntable (22). The top of the connecting rod (24) is fixedly connected with an extension device (25). Limit blocks (12) are fixedly connected to the front end and the rear end of the connecting sleeve (10). Two limit grooves (11) are formed on the inner wall of the drive cavity (6). One end of the limit block (12) far from the connecting sleeve (10) extends into the interior of the limit groove (11). Two rollers (23) are rotatably connected to the bottom of the turntable (22). An annular groove is formed on the upper surface of the operation table (1). The bottom of the roller (23) abuts against the bottom of the inner wall of the annular groove. The extension device (25) includes a storage plate (26). The right side surface of the storage plate (26) is fixedly connected to the top end of the connecting rod (24). A storage cavity (27) is formed inside the storage plate (26). A third motor (28) is fixedly installed on the inner wall of the storage cavity (27). The output shaft of the third motor (28) is fixedly connected to a movable rod (29). A movable plate (30) is threadedly connected to the surface of the movable rod (29). A connecting sleeve (33) is fixedly installed on the front surface of the movable plate (30). The connecting sleeve (33) is located outside the movable rod (29). An installation groove (34) is formed in the front surface of the connecting sleeve (33). A fourth motor (35) is fixedly installed on the inner wall of the installation groove (34). The output shaft of the fourth motor (35) is fixedly installed with a welding head (36). A camera (37) is fixedly installed on the front surface of the welding head (36). Pulleys (31) are fixedly connected to both the top and bottom of the movable plate (30). Sliding grooves (32) are formed in both the top and bottom of the inner wall of the storage cavity (27). One end of the pulley (31) away from the movable plate (30) extends into the sliding groove (32).

2. The automatic welding device for the inner circle of a pipe according to claim 1, characterized in that: The output end of the control panel (2) is electrically connected to the input ends of the first motor (7), the second motor (19), the third motor (28), the fourth motor (35), the welding head (36), and the camera (37).

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