An automatically aligned boiler pipeline welding device

Abstract

The present invention discloses an automatically aligned boiler pipeline welding device, which includes a base. On the upper side of the base, there are two clamping components for clamping the pipeline, a supporting component for supporting the pipeline is arranged on the upper side of the base, and a weld seam adjusting component for adjusting the welding seam of the pipeline is arranged inside the base; in the present invention, the boiler pipeline is supported by the supporting wheels on the left and right sides, and the pipeline is clamped by the clamping wheels on the left and right sides, so that the pipeline remains stable during the welding process. At the same time, the weld seam width is controlled by the weld seam adjusting block, and the lower side of the pipeline is measured by the side measuring wheel, so as to change the position of the upper end surface of the magnetic abutting block, so as to ensure that the upper end surface of the magnetic abutting block is flush with the lower side of the pipeline, thereby ensuring that the weld seam width remains consistent during pipeline welding. Then, the driving friction wheel rotates to drive the pipeline to rotate, and the pipeline is welded by the welding torch, improving the welding efficiency and welding quality.

Description

Technical Field

[0001] The present invention relates to the technical field related to boiler pipe welding, and specifically to an automatic alignment boiler pipe welding device. Background Art

[0002] A boiler pipe refers to steel with both ends open and a hollow cross-section, and its length is relatively large compared to its perimeter. It is mainly used for boiler gas transmission. Since the gas pressure in the pipe is relatively high during gas transmission, high requirements are imposed on the welding quality of boiler pipes. Traditional boiler pipe welding is mainly carried out manually, resulting in the welding quality mainly depending on the technical level of the operators. At the same time, it causes a large workload for the operators, low welding efficiency, and the positioning operation during welding of existing boiler pipe welding devices is complex, the welding speed is slow, and the weld control is inconvenient, affecting the welding quality. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic alignment boiler pipe welding device to overcome the above-mentioned defects in the prior art.

[0004] An automatic alignment boiler pipe welding device according to the present invention includes a base. Two clamping components for clamping pipes are arranged on the upper side of the base. A support component for supporting the pipe is arranged on the upper side of the base. A weld adjustment component for adjusting the welding gap of the pipe is arranged inside the base;

[0005] The clamping component includes a slider seat. A slider is arranged inside the slider seat. A lifting plate is fixed to the lower end face of the slider. A driving friction wheel is arranged inside the lifting plate. A driven friction wheel is arranged below the driving friction wheel. The outer circumferences of the driving friction wheel and the driven friction wheel are in contact. Clamping wheel seats are arranged on both the left and right sides of the driven friction wheel. Clamping wheels are rotatably fitted inside the lower end faces of the two clamping wheel seats;

[0006] The support component includes four support wheels. The four support wheels are arranged below the four clamping wheels. A side measuring wheel seat is arranged inside the base. A side measuring wheel is rotatably fitted inside the upper end face of the side measuring wheel seat. The side measuring wheel seat is located in front of the two support wheels at the rear;

[0007] The weld adjustment component includes an abutting block seat arranged inside the base. A magnetic abutting block is arranged inside the abutting block seat. A weld adjustment block is fixed to the upper end face of the magnetic abutting block. A lead screw is in threaded fit inside the abutting block seat.

[0008] Preferably, two horizontally symmetric cross plates are provided on the upper side of the base. Four mirror-image support rods are fixed between each of the two cross plates and the upper end surface of the base. The two slider seats are respectively fixed to the lower end surfaces of the corresponding cross plates. An opening-downward slider cavity is provided in each of the two slider seats. The two sliders are respectively slidably engaged with the slider cavities on the corresponding sides. Upper electromagnets are fixed in the upper end walls of the two slider cavities. Slider springs are fixed between the two upper electromagnets and the upper end surfaces of the sliders on the corresponding sides. By controlling the power-on and power-off of the upper electromagnets, the up-and-down movement of the sliders is controlled, thereby realizing the up-and-down movement of the lifting plate.

[0009] Preferably, two clamping wheel seat cavities that are symmetrically arranged left and right with the active friction wheel as the center are provided in each of the two lifting plates. The lower ends of the two clamping wheel seat cavities are open. The two clamping wheel seats are respectively slidably engaged with the clamping wheel seat cavities on the corresponding sides. Clamping wheel seat springs are fixed between the end faces of the two clamping wheel seats away from the active friction wheel and the end walls of the clamping wheel seat cavities on the corresponding sides away from the active friction wheel.

[0010] Two symmetrically arranged front and rear shaft seats are fixed to the lower end surface of the lifting plate. The two shaft seats are both located between the clamping wheel seats on the left and right sides. A driven friction wheel shaft is rotatably fitted in the rear shaft seat. The front part of the driven friction wheel shaft extends forward into the front shaft seat. The driven friction wheel is fixed to the outer periphery of the driven friction wheel shaft. The driven friction wheel shaft is located between the two shaft seats. An active friction wheel cavity is provided in the lifting plate. The active friction wheel cavity is located above the driven friction wheel. A motor fixed to the lifting plate is provided at the rear of the active friction wheel cavity. The front end of the motor is power-connected to a motor shaft. The front part of the motor shaft extends forward into the active friction wheel cavity. The active friction wheel is fixed to the front end of the motor shaft. By rotating the active friction wheel, the driven friction wheel can be rotated, thereby driving the pipeline to rotate.

[0011] Preferably, the four support wheels are rotatably fitted on the upper end surface of the base. The four support wheels are mirror-image arranged with the magnetic abutting block as the center. An opening-upward side measuring wheel seat cavity is provided in the base. The side measuring wheel seat is slidably engaged with the side measuring wheel seat cavity. A side measuring spring is fixed between the side measuring wheel seat and the bottom wall of the side measuring wheel seat cavity. A gear cavity is communicated with the front side of the side measuring wheel seat cavity. A bevel gear cavity is provided on the right side of the gear cavity. A gear shaft is rotatably fitted in the left end wall of the bevel gear cavity. The left part of the gear shaft extends leftward into the gear cavity, and its right part extends rightward into the bevel gear cavity. A driven gear is fixed to the left end of the gear shaft. The outer periphery of the driven gear is engaged with the right end face of the side measuring wheel seat.

[0012] Preferably, an abutting block seat cavity with an upward opening is provided inside the base. The abutting block seat is slidably engaged with the abutting block seat cavity. An abutting block cavity with an upward opening is provided inside the abutting block seat. The magnetic abutting block is slidably engaged with the abutting block cavity. A lower electromagnet is fixed on the lower end wall of the abutting block cavity. An abutting block spring is fixed between the lower end face of the magnetic abutting block and the lower electromagnet. By energizing and de-energizing the lower electromagnet, the up-and-down movement of the magnetic abutting block can be controlled.

[0013] Preferably, a belt cavity is provided below the abutting block seat cavity. The rear part of the belt cavity extends backward to the lower side of the bevel gear cavity. The lower part of the lead screw extends downward into the belt cavity. A driven bevel gear shaft is rotatably engaged in the lower end wall of the bevel gear cavity. The upper part of the driven bevel gear shaft extends upward into the bevel gear cavity, and its lower part extends downward into the belt cavity. A belt is connected between the driven bevel gear shaft and the lead screw for power transmission. A driven bevel gear is fixed to the upper end of the driven bevel gear shaft, and a driving bevel gear is fixed to the right end of the gear shaft. The driving bevel gear and the driven bevel gear are meshed with each other.

[0014] Preferably, through cavities are provided in both of the slider seats. A welding torch is arranged between the two slider seats. The welding torch is located above the magnetic abutting block. The through cavities are open at one end close to the welding torch. A connecting rod is fixed between the front and rear sliders on both sides. The welding torch is fixed on the outer periphery of the connecting rod. The welding torch can be used to weld the pipeline.

[0015] The beneficial effects of the present invention are as follows: The boiler pipeline is supported by the supporting wheels on the left and right sides, and the pipeline is clamped by the clamping wheels on the left and right sides, so that the pipeline remains stable during the welding process. At the same time, the weld width is controlled by the weld adjusting block, and the lower side of the pipeline is measured by the side measuring wheel, so as to change the position of the upper end face of the magnetic abutting block, so as to ensure that the upper end face of the magnetic abutting block is flush with the lower side of the pipeline, thereby ensuring that the weld width remains consistent during pipeline welding. Then, the driving friction wheel rotates to drive the pipeline to rotate, and the pipeline is welded by the welding torch, improving the welding efficiency and welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the external view schematic diagram of the present invention;

[0017] Figure 2 is the overall structural schematic diagram of an automatic alignment boiler pipeline welding device of the present invention;

[0018] Figure 3 is the present invention Figure 2 Schematic diagram of A-A in;

[0019] Figure 4 is the present invention Figure 3Schematic diagram of B-B in [the figure];

[0020] Figure 5 is the present invention Figure 4 Schematic diagram of C-C in [the figure];

[0021] Figure 6 is the present invention Figure 2 Partial enlarged schematic diagram of the slider seat component in [the figure];

[0022] Figure 7 is the present invention Figure 3 Partial enlarged schematic diagram of the slider seat component in [the figure];

[0023] Figure 8 is the present invention Figure 3 Partial enlarged schematic diagram of the side measuring wheel seat component in [the figure].

[0024] In the figure:

[0025] 10. Base; 11. Side measuring spring; 12. Support wheel; 13. Support rod; 14. Cross plate; 15. Slider seat; 16. Side measuring wheel; 17. Side measuring wheel seat; 18. Side measuring wheel seat cavity; 19. Slider cavity; 20. Welding torch; 21. Connecting rod; 22. Magnetic abutting block; 23. Abutting block spring; 24. Abutting block cavity; 25. Lower electromagnet; 26. Abutting block seat cavity; 27. Abutting block seat; 28. Driven bevel gear; 29. Bevel gear cavity; 30. Gear shaft; 31. Weld seam adjusting block; 32. Driven gear; 33. Driving bevel gear; 34. Driven bevel gear shaft; 35. Belt; 36. Belt cavity; 37. Lead screw; 38. Upper electromagnet; 39. Slider; 40. Driving friction wheel; 41. Lifting plate; 42. Driven friction wheel shaft; 43. Driven friction wheel; 44. Clamping wheel; 45. Clamping wheel seat; 46. Clamping wheel seat spring; 47. Clamping wheel seat cavity; 48. Slider spring; 49. Through cavity; 50. Driving friction wheel cavity; 51. Motor shaft; 52. Shaft seat; 53. Motor; 54. Gear cavity. Detailed implementation manners

[0026] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the Figure 2 orientation or positional relationships shown in the attached [figure], and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0027] In order to make the objectives and advantages of the present invention more clearly understood, the specific features of the automatic alignment boiler pipe welding device will be described in detail below:

[0028] Referring to Figures 1 - 8 , an automatic alignment boiler pipe welding device according to an embodiment of the present invention includes a base 10. Two clamping components for clamping pipes are provided on the upper side of the base 10. A support component for supporting the pipes is provided on the upper side of the base 10. A weld seam adjustment component for adjusting the welding seam of the pipes is provided inside the base 10;

[0029] The clamping component includes a slider seat 15. A slider 39 is provided inside the slider seat 15. A lifting plate 41 is fixed to the lower end surface of the slider 39. A driving friction wheel 40 is provided inside the lifting plate 41. A driven friction wheel 43 is provided below the driving friction wheel 40. The outer circumferences of the driving friction wheel 40 and the driven friction wheel 43 are in contact with each other. Clamping wheel seats 45 are provided on both the left and right sides of the driven friction wheel 43. Clamping wheels 44 are rotatably fitted inside the lower end surfaces of the two clamping wheel seats 45. The four clamping wheels 44 that can slide left and right enable the present invention to clamp pipes of different sizes;

[0030] The support component includes four support wheels 12. The four support wheels 12 are provided below the four clamping wheels 44. A side measuring wheel seat 17 is provided inside the base 10. A side measuring wheel 16 is rotatably fitted inside the upper end surface of the side measuring wheel seat 17. The side measuring wheel seat 17 is located in front of the two support wheels 12 at the rear side;

[0031] The weld seam adjustment component includes an abutting block seat 27 provided inside the base 10. A magnetic abutting block 22 is provided inside the abutting block seat 27. A weld seam adjustment block 31 is fixed to the upper end surface of the magnetic abutting block 22. A lead screw 37 is in threaded fit inside the abutting block seat 27.

[0032] Among them, two horizontally arranged plates 14 that are symmetric front and rear are provided on the upper side of the base 10. Four mirror-image arranged support rods 13 are fixed between the two horizontally arranged plates 14 and the upper end surface of the base 10. The two slider seats 15 are respectively fixed to the lower end surfaces of the corresponding horizontally arranged plates 14. Slider cavities 19 with openings downward are provided inside the two slider seats 15. The two sliders 39 are respectively in sliding fit with the corresponding slider cavities 19. Upper electromagnets 38 are fixed inside the upper end walls of the two slider cavities 19. Slider springs 48 are fixed between the two upper electromagnets 38 and the upper end surfaces of the corresponding sliders 39. By controlling the energization and de-energization of the upper electromagnets 38, the up and down movement of the sliders 39 is controlled, thereby realizing the up and down movement of the lifting plate 41.

[0033] Among them, two of the lifting plates 41 are each provided with two clamping wheel seat cavities 47 that are symmetrically arranged left and right with the driving friction wheel 40 as the center. The lower ends of the two clamping wheel seat cavities 47 are both open. The two clamping wheel seats 45 are respectively in sliding fit with the corresponding clamping wheel seat cavities 47 on the corresponding sides. Between the end faces of the two clamping wheel seats 45 on the side away from the driving friction wheel 40 and the end walls of the corresponding clamping wheel seat cavities 47 on the side away from the driving friction wheel 40, a clamping wheel seat spring 46 is fixed. The clamping wheel seat spring 46 is used for the reset of the clamping wheel seat 45;

[0034] On the lower end face of the lifting plate 41, two axles seats 52 that are symmetrically arranged front and back are fixed. The two axles seats 52 are both located between the clamping wheel seats 45 on the left and right sides. The rear axle seat 52 is rotationally and fittingly provided with a driven friction wheel shaft 42. The front part of the driven friction wheel shaft 42 extends forward into the front axle seat 52. The driven friction wheel 43 is fixed on the outer periphery of the driven friction wheel shaft 42. The driven friction wheel shaft 42 is located between the two axles seats 52. In the lifting plate 41, a driving friction wheel cavity 50 is provided. The driving friction wheel cavity 50 is located above the driven friction wheel 43. At the rear of the driving friction wheel cavity 50, a motor 53 fixed to the lifting plate 41 is provided. The front end of the motor 53 is power-connected to a motor shaft 51. The front part of the motor shaft 51 extends forward into the driving friction wheel cavity 50. The driving friction wheel 40 is fixed to the front end of the motor shaft 51. By the rotation of the driving friction wheel 40, the driven friction wheel 43 can be rotated, thereby driving the pipeline to rotate.

[0035] Among them, the four support wheels 12 are rotationally and fittingly arranged on the upper end face of the base 10. The four support wheels 12 are mirror-symmetrically arranged with the magnetic abutting block 22 as the center. In the base 10, a side measuring wheel seat cavity 18 with an upward opening is provided. The side measuring wheel seat 17 and the side measuring wheel seat cavity 18 are in sliding fit. Between the side measuring wheel seat 17 and the bottom wall of the side measuring wheel seat cavity 18, a side measuring spring 11 is fixed. The side measuring spring 11 is used for the reset of the side measuring wheel seat 17. The front side of the side measuring wheel seat cavity 18 is communicated with a gear cavity 54. On the right side of the gear cavity 54, a bevel gear cavity 29 is provided. In the left end wall of the bevel gear cavity 29, a gear shaft 30 is rotationally and fittingly arranged. The left part of the gear shaft 30 extends leftward into the gear cavity 54, and its right part extends rightward into the bevel gear cavity 29. The left end of the gear shaft 30 is fixed with a driven gear 32. The outer periphery of the driven gear 32 is meshed with the right end face of the side measuring wheel seat 17.

[0036] Among them, a butting block seat cavity 26 with an upward opening is provided in the base 10. The butting block seat 27 and the butting block seat cavity 26 are in sliding fit. An upward-opening butting block cavity 24 is provided in the butting block seat 27. The magnetic butting block 22 and the butting block cavity 24 are in sliding fit. A lower electromagnet 25 is fixed on the lower end wall of the butting block cavity 24. A butting block spring 23 is fixed between the lower end face of the magnetic butting block 22 and the lower electromagnet 25. The butting block spring 23 is used for the reset of the magnetic butting block 22. By the power-on and power-off of the lower electromagnet 25, the up-and-down movement of the magnetic butting block 22 can be controlled.

[0037] Among them, a belt cavity 36 is provided below the butting block seat cavity 26. The rear part of the belt cavity 36 extends backward to the lower side of the bevel gear cavity 29. The lower part of the lead screw 37 extends downward into the belt cavity 36. A driven bevel gear shaft 34 is rotatably fitted in the lower end wall of the bevel gear cavity 29. The upper part of the driven bevel gear shaft 34 extends upward into the bevel gear cavity 29, and its lower part extends downward into the belt cavity 36. A belt 35 is in power connection between the driven bevel gear shaft 34 and the lead screw 37. A driven bevel gear 28 is fixed at the upper end of the upper side of the driven bevel gear shaft 34. A driving bevel gear 33 is fixed at the right end of the gear shaft 30. The driving bevel gear 33 and the driven bevel gear 28 are meshed with each other.

[0038] Among them, a through cavity 49 is provided in each of the two slider seats 15. A welding torch 20 is arranged between the two slider seats 15. The welding torch 20 is located above the magnetic butting block 22. One end of each of the two through cavities 49 close to the welding torch 20 is open. A connecting rod 21 is fixed between the front and rear sliders 39. The welding torch 20 is fixed on the outer periphery of the connecting rod 21. The pipeline can be welded by using the welding torch 20.

[0039] The working process of an automatic alignment boiler pipeline welding device of the present invention is as follows:

[0040] When the present invention is in the initial state, the upper end face of the magnetic butting block 22 is flush with the upper side face of the side measuring wheel 16. The lower electromagnet 25 is in a power-off state. The butting block spring 23 is in a relaxed state. The lower end of the welding torch 20 is slightly higher than the lower side face of the driven friction wheel 43.

[0041] Place the two sections of boiler pipelines to be welded between the two supporting wheels 12 on the corresponding side.

[0042] At this time, the outer circumference of the rear section of the pipe will press down on the side measuring wheel 16, causing the side measuring wheel 16 to drive the side measuring wheel seat 17 to move downward, thereby causing the driven gear 32 to rotate, driving the gear shaft 30 to rotate, further causing the driving bevel gear 33 to rotate, and then driving the driven bevel gear 28 to rotate, so that the driven bevel gear shaft 34 rotates. The lead screw 37 is driven to rotate through the belt 35, causing the abutting block seat 27 to move downward, thereby driving the magnetic abutting block 22 to move downward, making the upper end face of the magnetic abutting block 22 flush with the lower side of the pipe.

[0043] During the process of placing the pipe, the end face of the end of the pipe to be welded is abutted against the side of the weld adjustment block 31. The thickness of the weld adjustment block 31 is used to control the width of the pipe weld. Since pipes of different diameters will cause the side measuring wheel 16 to move downward by different distances, the magnetic abutting block 22 flush with the side measuring wheel 16 can make the welds consistent when welding pipes of different diameters.

[0044] At this time, the upper electromagnets 38 on the front and rear sides are activated, so that the two upper electromagnets 38 repel the sliders 39 on the corresponding sides. Then the two sliders 39 move downward against the pulling force of the slider springs 48 on the corresponding sides, thereby driving the lifting plates 41 on the corresponding sides to move downward.

[0045] When the two clamping wheels 44 on the corresponding side are in contact with the outer circumference of the pipe, the lifting plate 41 that continues to move downward causes the clamping wheels 44 on the left and right sides to move away from each other, thereby driving the clamping wheel seats 45 on the corresponding side to move away from each other, so that the clamping wheel seat springs 46 on the corresponding side are compressed.

[0046] Until the outer circumference of the driven friction wheel 43 on the corresponding side is in contact with the outer circumference of the pipe, thereby clamping pipes of different diameters.

[0047] At this time, the lower electromagnet 25 is activated, causing the lower electromagnet 25 to attract the magnetic abutting block 22. Then the magnetic abutting block 22 moves downward against the elastic force of the abutting block spring 23, thereby driving the weld adjustment block 31 to move downward away from the front and rear sections of the pipe.

[0048] Then, the two motors 53 are activated, causing the motor shafts 51 on the corresponding sides to rotate, driving the driving friction wheels 40 on the corresponding sides to rotate, and then driving the driven friction wheels 43 on the corresponding sides to rotate, so as to drive the pipes on the corresponding sides to rotate simultaneously in the same direction.

[0049] During the downward movement of the sliders 39 on the front and rear sides, the two sliders 39 drive the connecting rod 21 to move downward, thereby causing the welding torch 20 to move downward. When the driven friction wheel 43 is in contact with the outer circumference of the pipe, the lower end of the welding torch 20 is slightly higher than the pipe weld.

[0050] At this time, the welding torch 20 is activated, and by rotating the pipe, welding of the pipe is achieved.

[0051] Those skilled in the art can clearly understand that various modifications to the above embodiments can be made without departing from the general spirit and concept of the present invention. All of them fall within the protection scope of the present invention. The protection scope of the present invention shall be subject to the appended claims of the present invention.

Claims

1. An automatically aligned boiler pipe welding device, comprising a base (10), characterized in that: On the upper side of the base (10), there are two clamping components for clamping the pipeline, on the upper side of the base (10), there is a supporting component for supporting the pipeline, and inside the base (10), there is a weld seam adjusting component for adjusting the welding seam of the pipeline; The clamping component includes a slider seat (15), inside the slider seat (15), there is a slider (39), the lower end surface of the slider (39) is fixed with a lifting plate (41), inside the lifting plate (41), there is a driving friction wheel (40), below the driving friction wheel (40), there is a driven friction wheel (43), the outer circumferences of the driving friction wheel (40) and the driven friction wheel (43) are in contact, on both the left and right sides of the driven friction wheel (43), there are clamping wheel seats (45), and inside the lower end surfaces of the two clamping wheel seats (45), there are clamping wheels (44) rotatably fitted; The support assembly includes four support wheels (12), and the four support wheels (12) are arranged on the lower sides of the four clamping wheels (44). A side measuring wheel seat (17) is arranged in the base (10), and a side measuring wheel (16) is rotatably fitted in the upper end face of the side measuring wheel seat (17). The side measuring wheel seat (17) is located in front of the two support wheels (12) at the rear side; the weld adjusting assembly includes an abutting block seat (27) arranged in the base (10), a magnetic abutting block (22) is arranged in the abutting block seat (27), a weld adjusting block (31) is fixed on the upper end face of the magnetic abutting block (22), and a lead screw (37) is in threaded fit with the abutting block seat (27); two horizontally arranged plates (14) symmetrical about the front and rear are arranged on the upper side of the base (10). Four mirror-image arranged support rods (13) are fixed between the two horizontally arranged plates (14) and the upper end face of the base (10). Two slider seats (15) are respectively fixed on the lower end faces of the corresponding horizontally arranged plates (14). A slider cavity (19) with an opening downward is arranged in each of the two slider seats (15). Two sliders (39) are respectively in sliding fit with the corresponding slider cavities (19). Upper electromagnets (38) are fixed in the upper end walls of the two slider cavities (19). Slider springs (48) are fixed between the two upper electromagnets (38) and the upper end faces of the corresponding sliders (39); two clamping wheel seat cavities (47) symmetrical about the left and right with the driving friction wheel (40) as the center are arranged in each of the two lifting plates (41). The lower ends of the two clamping wheel seat cavities (47) are both open. Two clamping wheel seats (45) are respectively in sliding fit with the corresponding clamping wheel seat cavities (47). Clamping wheel seat springs (46) are fixed between the end faces of the two clamping wheel seats (45) away from the driving friction wheel (40) and the end walls of the corresponding clamping wheel seat cavities (47) away from the driving friction wheel (40); two axles seats (52) symmetrical about the front and rear are fixed on the lower end face of the lifting plate (41). The two axles seats (52) are both located between the two clamping wheel seats (45) on the left and right sides. A driven friction wheel shaft (42) is rotatably fitted in the axle seat (52) at the rear side. The front part of the driven friction wheel shaft (42) extends forward into the axle seat (52) at the front side. A driven friction wheel (43) is fixed on the outer periphery of the driven friction wheel shaft (42). The driven friction wheel shaft (42) is located between the two axles seats (52). A driving friction wheel cavity (50) is arranged in the lifting plate (41). The driving friction wheel cavity (50) is located above the driven friction wheel (43). A motor (53) fixed to the lifting plate (41) is arranged at the rear side of the driving friction wheel cavity (50). The front end of the motor (53) is in power connection with a motor shaft (51). The front part of the motor shaft (51) extends forward into the driving friction wheel cavity (50). The driving friction wheel (40) is fixed at the front end of the front side of the motor shaft (51);Four of the support wheels (12) are rotatably fitted to the upper end surface of the base (10). The four support wheels (12) are mirror-symmetrically arranged with the magnetic abutting block (22) as the center. An edge-measuring wheel seat cavity (18) with an upward opening is provided in the base (10). The edge-measuring wheel seat (17) and the edge-measuring wheel seat cavity (18) are slidably fitted. A side-measuring spring (11) is fixed between the edge-measuring wheel seat (17) and the bottom wall of the edge-measuring wheel seat cavity (18). A gear cavity (54) is communicatively provided on the front side of the edge-measuring wheel seat cavity (18). A bevel gear cavity (29) is provided on the right side of the gear cavity (54). A gear shaft (30) is rotatably fitted in the left end wall of the bevel gear cavity (29). The left part of the gear shaft (30) extends leftward into the gear cavity (54), and its right part extends rightward into the bevel gear cavity (29). A driven gear (32) is fixed to the left end of the gear shaft (30). The outer circumference of the driven gear (32) meshes with the right end face of the edge-measuring wheel seat (17). An abutting block seat cavity (26) with an upward opening is provided in the base (10). The abutting block seat (27) and the abutting block seat cavity (26) are slidably fitted. An abutting block cavity (24) with an upward opening is provided in the abutting block seat (27). The magnetic abutting block (22) and the abutting block cavity (24) are slidably fitted. A lower electromagnet (25) is fixed to the lower end wall of the abutting block cavity (24). An abutting block spring (23) is fixed between the lower end face of the magnetic abutting block (22) and the lower electromagnet (25). A belt cavity (36) is provided below the abutting block seat cavity (26). The rear part of the belt cavity (36) extends rearward to the lower side of the bevel gear cavity (29). The lower part of the lead screw (37) extends downward into the belt cavity (36). A driven bevel gear shaft (34) is rotatably fitted in the lower end wall of the bevel gear cavity (29). The upper part of the driven bevel gear shaft (34) extends upward into the bevel gear cavity (29), and its lower part extends downward into the belt cavity (36). A belt (35) is connected between the driven bevel gear shaft (34) and the lead screw (37) for power transmission. A driven bevel gear (28) is fixed to the upper end of the driven bevel gear shaft (34). A driving bevel gear (33) is fixed to the right end of the gear shaft (30). The driving bevel gear (33) meshes with the driven bevel gear (28).; 2. The automatic alignment boiler pipeline welding device according to claim 1, characterized in that: There are through cavities (49) in both of the two slider seats (15), between the two slider seats (15), there is a welding torch (20), the welding torch (20) is located above the magnetic abutting block (22), one end of the two through cavities (49) close to the welding torch (20) is open, a connecting rod (21) is fixed between the sliders (39) on the front and rear sides, and the welding torch (20) is fixed on the outer circumference of the connecting rod (21).

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