Automatic pipeline inner wall welding device and working method thereof

Abstract

The application discloses a kind of pipeline inner wall automatic welding equipment and its working method, including base, supporting mechanism, the supporting mechanism includes support, the body of the support is penetrated and is connected with two rotating rods, the outside of two rotating rods is penetrated and is fixedly connected with gear, the outer surface of two gears is engaged with each other, the outer surface of two gears is fixedly connected with rotating strip, two rotating strips are eight character and are opened by the engagement of two gears, to adapt to the pipeline of different inner diameter, one end of two rotating strips is fixedly connected with clamping frame, the outer surface of two clamping frames is rotatably connected with clamping wheel, it is related to welding equipment technical field, when the existing steel pipe inner automatic welding equipment is used, the stability of device is insufficient due to the smaller supporting range, it is prone to dump and dislocation and affects welding work, while supporting orientation is fixed, different specifications reinforcement cage cannot be adapted, leading to the problem of limited use range.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to an automatic welding device for the inner wall of a pipe and its working method. Background Technology

[0002] Existing technologies typically involve first hoisting the steel pipe onto a welding platform using hoisting equipment, then placing the reinforcing cage inside the steel pipe, and finally welding the contact area between the reinforcing cage and the inner wall of the steel pipe. This welding process usually requires workers to manually enter the steel pipe, which is not only inefficient but also easily limited by space constraints. An automatic welding device for steel pipes, with application number CN202210637421.X, includes a connecting seat and a fixing frame. It welds the contact area between the inner wall of the steel pipe and the reinforcing bars using a welding head. Once the positioning wheel contacts the next equally spaced reinforcing bar ring, welding proceeds to the next position, thus achieving automatic welding and reducing the need for manual entry into the pipeline.

[0003] Although this device has the advantages mentioned above, it still has the following drawbacks in practical use:

[0004] 1) The device supports the entire welding device through two connecting wheels, and the roller assembly and welding structure are both biased to one side, causing the center of the entire welding device to shift. When moving, the device is prone to tipping over and misalignment, thus affecting the overall welding quality and efficiency.

[0005] 2) The two connecting wheels of the device are fixed in orientation, which cannot be adapted to steel cages with different numbers of steel bars. At the same time, the support range of the support point is small, which further reduces the stability of the device.

[0006] Therefore, improvements are needed to address the shortcomings of existing devices. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides an automatic pipe inner wall welding device and its working method. It solves the problems of insufficient stability of existing automatic steel pipe inner wall welding devices due to their small support range, which makes them prone to tipping over and dislodging, thus affecting welding work. At the same time, the fixed support orientation cannot be adapted to different specifications of steel cages, thus limiting the scope of use.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an automatic pipe inner wall welding device, comprising a base and a support mechanism, wherein the support mechanism includes a bracket, the body of which is rotatably connected to two rotating rods, both of which are fixedly connected to gears, the outer surfaces of the two gears meshing with each other, and rotating bars fixedly connected to the outer surfaces of both gears, the two rotating bars being arranged in a V-shape through the meshing of the two gears to adapt to pipes of different inner diameters, one end of each of the two rotating bars being fixedly connected to a clamp, and the outer surfaces of both clamps being rotatably connected to clamping wheels, the clamping wheels interacting with the internal steel bars of the pipe;

[0009] An adjustment component, which is disposed on the arc surface of the base, is used to adjust the orientation of the clamping wheels to accommodate different numbers of steel bars;

[0010] A welding assembly is disposed on the outside of one side of the base surface and performs welding on the inside of the pipe by moving synchronously with the base.

[0011] Preferably, a worm gear is fixedly connected through the outer surface of one of the rotating rods, a worm is engaged with the outer surface of the worm gear, one end of the worm is rotatably connected to the outer surface of the bracket, and a rib is fixedly connected through the other end of the worm.

[0012] Preferably, the adjustment component includes an arc groove, which is formed on the outer arc surface of the base. An arc block is slidably connected inside the arc groove, and an arc plate is fixedly connected to the outer surface of the arc block. One side of the outer surface of the arc plate is movably connected to the outer arc surface of the base, and the other side of the outer surface of the arc plate is fixedly connected to the outer surface of the bracket.

[0013] Preferably, the body of the arc plate is slidably connected to a ring rod, the outer surface of the ring rod is fixedly connected to a fixed plate, the outer surface of the fixed plate is fixedly connected to the outer arc surface of the base, a compression spring is sleeved on the outside of the ring rod, the two ends of the compression spring are fixedly connected to the fixed plate and the outer surface of the arc plate respectively, and a threaded ring is threaded to the outer surface of the ring rod, the outer surface of the threaded ring is movably connected to the outer surface of the arc plate.

[0014] Preferably, the welding assembly includes a slide rail disposed on the outside of one side of the outer surface of the base, a linear motor slidably connected to the outer surface of the slide rail, and a laser welder fixedly connected to the outer surface of the linear motor.

[0015] Preferably, a support plate is fixedly connected to the outer surface of the slide rail, a rotary motor is fixedly connected to the outer surface of the support plate, the outer surface of the rotary motor is embedded and fixedly connected to one side of the outer surface of the base, a storage battery is fixedly connected to the outer surface of the support plate, and the output end of the storage battery is electrically connected to the input end of the rotary motor and the laser welder, respectively.

[0016] Preferably, a drive unit is provided on the outside of the support plate. The drive unit includes a telescopic rod. One end of the telescopic rod is fixedly connected to the outer surface of the support plate. A connecting frame is fixedly connected to the output end of the telescopic rod. A drive motor is fixedly connected to the outer surface of the connecting frame. The output end of the drive motor is rotatably connected to the body of the connecting frame. A roller is fixedly connected to the output end of the drive motor.

[0017] Preferably, the outer surface of the roller is provided with an annular groove, and the interior of the annular groove is connected to a suction hole. The suction hole is provided on the body of the roller and is connected to the interior of the roller. A filter screen is fixedly connected to the interior of the roller. A fixed tube is passed through the interior of the roller. One end of the fixed tube is rotatably connected to the body of the bracket and extends to the outside of the bracket. A suction tube is sleeved on one end of the fixed tube, and one end of the suction tube is embedded and fixedly connected to the outer surface of the bracket.

[0018] This invention also discloses a method for operating an automatic pipe inner wall welding device, specifically including the following steps:

[0019] Step 1: First, on the outside of one end of the pipe, according to the number and position of the reinforcing bars in the steel cage, turn the screw ring to change its position on the ring rod, and through the elastic force of the compression spring, make the arc plate slide along the arc surface of the base to change the orientation of the clamping wheel so that the clamping wheel can be radially aligned with the reinforcing bar.

[0020] Step 2: Twist the worm gear with the ribs, and through the meshing of the worm gear and the worm wheel, the worm wheel drives the corresponding gear to rotate through the rotating rod on one side. Through the meshing of the two gears, the two corresponding rotating bars drive the clamping wheel to spread out in a figure eight shape through the clamping frame. Adjust the distance between the clamping wheel and the base, and then place the base inside the pipe through the cooperation of the clamping wheel and the steel bar.

[0021] Step 3: After the base enters the pipe, the output end of the rotary motor drives the support plate to rotate, so that the laser welder and roller face the area to be welded. Then, through the extension and retraction of the output end of the telescopic rod, the roller is brought into contact with the outside of the area to be welded. Subsequently, the drive motor drives the roller to rotate, so as to push the base to move inside the pipe. At the same time, the linear motor slides along the slide rail to bring the laser welder closer to the area to be welded, and performs continuous welding by following the movement of the base.

[0022] Beneficial effects

[0023] This invention provides an automatic welding device for the inner wall of a pipe and its operating method. Compared with the prior art, it has the following advantages:

[0024] (1) By setting up a support mechanism, the radial support range can be increased by setting up multiple sets of clamping wheels. At the same time, by using the meshing of gears on both sides, the two clamping wheels in the same group can be opened, which can not only adapt to the welding inside steel pipes with different inner diameters, but also increase the axial support range. In addition, after each set of clamping wheels is opened, it forms a triangular support with the bracket, which not only increases the range of use, but also further improves the stability of the device.

[0025] (2) By setting an adjustment component, the arc plate moves along the arc surface of the base, so that the bracket can drive the clamping wheel to follow the movement, thereby making the clamping wheel radially aligned with the steel bars at different positions, so as to adapt to steel cages of different specifications. At the same time, the ring rod and arc block can guide the movement of the arc plate and improve the stability and force of the arc plate and clamping wheel. Furthermore, the position of the arc plate can be fixed by the extension and contraction of the compression spring and the change of the position of the screw ring, so as to further improve the stability of the arc plate and clamping wheel.

[0026] (3) By setting up welding components and using a rotary motor to drive the support plate to rotate, the laser welder can be aligned with the reinforcing bars at different positions, so that complete welding work can be carried out inside the steel pipe. At the same time, a linear motor is used to drive the laser welder to adapt to the welding work inside steel pipes of different diameters, thereby improving the application range of the device.

[0027] (4) By setting up a drive unit, the extension and retraction of the telescopic rod can make the roller adapt to steel pipes of different diameters. At the same time, by setting up an annular groove, it can adapt to reinforcing bars or welds. Through the action of suction holes, fixed pipes and suction tubes, the area to be welded can be pre-cleaned during the movement of the roller, thereby improving the welding quality. Attached Figure Description

[0028] Figure 1 This is a perspective view of the external structure of the base of the present invention;

[0029] Figure 2 This is a perspective view of the external structure of the gear of the present invention;

[0030] Figure 3 This is a perspective view of the external structure of the ring rod of the present invention;

[0031] Figure 4 This is a perspective view of the external structure of the support plate of the present invention;

[0032] Figure 5 This is a perspective view of the internal structure of the roller of the present invention.

[0033] In the diagram: 1. Base; 2. Bracket; 3. Adjustment assembly; 31. Arc groove; 32. Arc block; 33. Arc plate; 34. Ring rod; 35. Fixed plate; 36. Compression spring; 37. Threaded ring; 4. Welding assembly; 41. Slide rail; 42. Linear motor; 43. Laser welder; 44. Support plate; 45. Rotary motor; 46. Drive unit; 461. Telescopic rod; 462. Connecting frame; 463. Drive motor; 464. Roller; 465. Ring groove; 466. Suction hole; 467. Filter screen; 468. Fixed tube; 469. Suction tube; 47. Battery; 5. Rotating rod; 6. Gear; 7. Rotating bar; 8. Clamping frame; 9. Clamping wheel; 10. Worm gear; 11. Worm; 12. Rib. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1-5 This invention provides a technical solution: an automatic welding device for the inner wall of a pipe.

[0036] Example 1: A support mechanism is provided on the outside of the base 1. The support mechanism includes a bracket 2. Two rotating rods 5 are rotatably connected through the body of the bracket 2. Gears 6 are fixedly connected through the outside of each of the two rotating rods 5. The two gears 6 have the same outer diameter and number of teeth to achieve synchronous, same-speed, and opposite-direction rotational opening operation. The outer surfaces of the two gears 6 mesh with each other. Rotating bars 7 are fixedly connected to the outer surfaces of the two gears 6. The two rotating bars 7 are opened in a V-shape through the meshing of the two gears 6 to adapt to pipes with different inner diameters. A clamp 8 is fixedly connected to one end of each of the two rotating bars 7. A clamping wheel 9 is rotatably connected to the outer surface of each of the two clamps 8. The clamping wheel 9 clamps the reinforcing bars of the reinforcing cage through the clamping action of the wheel rim. The stability of the base 1 can be improved. The clamping wheel 9 interacts with the steel bars inside the pipe. A worm wheel 10 is fixedly connected through the outer surface of one of the rotating rods 5. A worm 11 is meshed with the outer surface of the worm wheel 10. The meshing of the worm wheel 10 and the worm 11 can not only drive the gear 6 to rotate, but also improve the stability of the clamping wheel 9 through the self-locking performance of the connection between the two, thereby further improving the stability of the base 1. One end of the worm 11 is embedded and rotatably connected to the outer surface of the bracket 2. The other end of the worm 11 is fixedly connected through a rib 12. The cross-section of the rib 12 is a regular polygon with an even number of sides, which makes it easy to rotate the worm 11 by hand and to rotate the worm 11 by turning it with a wrench.

[0037] In this embodiment, the steel pipe is first laid flat on the ground or welding table, then clamped. The steel cage to be welded is then placed inside the steel pipe, and the base 1 is placed outside one end of the steel pipe. Based on the distance between the steel cage reinforcement and the steel pipe axis, the rib 12 is held by hand or with a wrench. Rotating the rib 12 causes the worm gear 11 to rotate, and one of the rotating rods 5 drives the corresponding gear 6 to rotate synchronously. The meshing of the two gears 6 causes the two rotating bars 7 to unfold in a V-shape, increasing the distance between the two clamping wheels 9 to improve the support range. Simultaneously, the radial distance between the clamping wheels 9 and the axis of the base 1 is shortened. Once the position of the clamping wheels 9 matches the position of the reinforcement, the rib 12 is stopped from being turned, and the base 1 is placed inside the steel pipe through the cooperation of the clamping wheels 9 and the reinforcement.

[0038] Example 2: An adjustment component 3 is provided on the outside of the bracket 2. The adjustment component 3 includes an arc groove 31, the curvature of which matches the curvature of the outer arc surface of the base 1. The arc groove 31 is formed on the outer arc surface of the base 1. An arc block 32 is slidably connected inside the arc groove 31. The cross-section of the arc block 32 is T-shaped to improve its stability in connection with the base 1. An arc plate 33 is fixedly connected to the outer surface of the arc block 32. One side of the surface of the arc plate 33 is arc-shaped to facilitate contact with the outer arc surface of the base 1. One side of the outer surface of the arc plate 33 is movably connected to the outer arc surface of the base 1, and the other side of the outer surface of the arc plate 33 is fixedly connected to the outer surface of the bracket 2. A ring rod 34 is slidably connected through the body of the arc plate 33. The ring rod 34 is annular in shape and has a circular cross-section, allowing the arc plate 33 to surround the dot of the base 1. The outer surface of the ring rod 34 is fixedly connected to a fixed plate 35. The fixed plate 35 can fix the ring rod 34 and limit the movement of the arc plate 33. The outer surface of the fixed plate 35 is fixedly connected to the outer arc surface of the base 1. A compression spring 36 is sleeved on the outside of the ring rod 34. The compression spring 36 can adjust the position of the arc plate 33 along the ring rod 34 by extension and retraction. The two ends of the compression spring 36 are fixedly connected to the fixed plate 35 and the outer surface of the arc plate 33, respectively. A threaded ring 37 is threaded on the outer surface of the ring rod 34. The threaded ring 37 can change its relative position on the ring rod 34 by rotating in both directions to abut against the thread. It can also fix the position of the arc plate 33 by clamping with the compression spring 36. The outer surface of the threaded ring 37 is movably connected to the outer surface of the arc plate 33.

[0039] In this embodiment, before adjusting the distance between the two clamping wheels 9, the screw ring 37 is rotated to change its relative position on the ring rod 34, thereby pushing the arc plate 33 through the screw ring 37, or pushing the arc plate 33 through the spring 36, so that the arc plate 33 moves along the ring rod 34, thereby causing the bracket 2 to drive the clamping wheels 9 to follow the movement through the rotating bar 7, so as to change the orientation of the clamping wheels 9 to make the clamping wheels 9 and the reinforcing bars radially aligned, thereby adapting to the reinforcing bars at different positions. At the same time, when the arc plate 33 moves, it drives the arc block 32 to move synchronously inside the arc groove 31 to guide and radially limit the arc plate 33.

[0040] Example 3: A welding assembly 4 is provided on the outside of the support 2. The welding assembly 4 includes a slide rail 41, which is located on the outside of one side of the outer surface of the base 1. A linear motor 42 is slidably connected to the outer surface of the slide rail 41. The linear motor 42 slides along the slide rail 41, which can drive the laser welder 43 to approach the welding point. This facilitates the welding of steel pipes of different diameters and maintains a fixed welding distance. The laser welder 43 is fixedly connected to the outer surface of the linear motor 42. The laser welder 43 can generate a laser to weld the inside of the steel pipe. A support plate 44 is fixedly connected to the outer surface of the slide rail 41. As a preferred embodiment, a scanning and recognition device can be provided on the support plate 44 to identify the position of the reinforcing bar or the weld of the steel pipe. The location of the seam is identified. A rotary motor 45 is fixedly connected to the outer surface of the support plate 44. The rotary motor 45 is made of servo motor. By driving the support plate 44 and the laser welder 43 to rotate, the welding end of the laser welder 43 can be oriented towards the position to be welded. This allows it to be adapted to the welding of steel cages of different specifications and to perform complete welding operations inside steel pipes. The outer surface of the rotary motor 45 is embedded and fixedly connected to one side of the outer surface of the base 1. A battery 47 is fixedly connected to the outer surface of the support plate 44. The battery 47 can supply power to the rotary motor 45, the scanning and identification device, the laser welder 43 and the linear motor 42. The output end of the battery 47 is electrically connected to the input end of the rotary motor 45 and the laser welder 43 respectively.

[0041] In this embodiment, after the base 1 drives the laser welder 43 into the steel pipe, the scanning and identification device scans and identifies the steel bar or steel pipe weld to be welded. Then, the output end of the rotary motor 45 drives the support plate 44 to rotate, so that the welding end of the laser welder 43 faces the steel bar or steel pipe weld to be welded. Subsequently, the linear motor 42 slides along the slide rail 41, so that the laser welder 43 follows the movement and brings its welding end close to the steel bar or steel pipe weld to be welded. Then, the laser welder 43 generates a laser to weld the steel bar or steel pipe weld to be welded. By following the axial movement of the base 1 inside the steel pipe, continuous and complete welding is performed. After the steel bar is welded, the laser welder 43 is driven by the rotary motor 45 again to face other steel bars. Then, by the reverse sliding of the base 1 inside the steel pipe, continuous welding is performed. Therefore, manual adjustment is not required, and the problem of the base 1 needing to repeatedly enter and exit the steel pipe is eliminated.

[0042] Example 4: A drive unit 46 is provided on the outside of the support plate 44. The drive unit 46 includes a telescopic rod 461. The telescopic rod 461 uses a spring rod output end for telescopic extension and retraction, and the radial distance can be adjusted to adapt to welding inside steel pipes of different diameters. One end of the telescopic rod 461 is fixedly connected to the outer surface of the support plate 44. A connecting frame 462 is fixedly connected to the output end of the telescopic rod 461. A drive motor 463 is fixedly connected to the outer surface of the connecting frame 462. The drive motor 463 is made of servo motor and is electrically connected to the battery 47. The reverse-rotation drive base 1 reciprocates inside the steel pipe to achieve complete welding of the base 1 inside the steel pipe. The output end of the drive motor 463 is rotatably connected to the main body of the connecting frame 462. A roller 464 is fixedly connected to the output end of the drive motor 463. A rubber ring can be provided on the surface of the roller 464 to improve contact friction and avoid direct contact between the roller 464 and the inside of the steel pipe, thereby avoiding wear caused by hard contact. At the same time, the roller 464 is hollow inside and is detachable. An annular groove 465 is formed on the outer surface. The annular groove 465 can be adapted to the position of the steel bar to be welded or aligned with the welding joint of the steel pipe, thereby improving the stability of the base 1. The annular groove 465 is connected to a suction hole 466, which can facilitate the pre-cleaning of impurities inside the steel pipe at the welding position through the annular groove 465, thereby improving the welding quality. The suction hole 466 is formed on the body of the roller 464 and is connected to the inside of the roller 464. A filter screen 467 is fixedly connected inside the roller 464, and the filter screen 467 can filter air. Impurities in the air are filtered to prevent them from clogging or flowing back into the steel pipe, thus avoiding any impact on welding quality. A solid pipe 468 is connected through the inside of the roller 464. One end of the solid pipe 468 is rotatably connected to the body of the bracket 2 and extends to the outside of the bracket 2. A suction pipe 469 is fitted onto one end of the solid pipe 468. One end of the suction pipe 469 can be connected to an external air suction device, and a rotational sealing measure is provided for the connection with one end of the solid pipe 468. One end of the suction pipe 469 is embedded and fixedly connected to the outer surface of the bracket 2.

[0043] In this embodiment, the extension and retraction of the output end of the telescopic rod 461 allows the roller 464 to fit against the area to be welded, and the annular groove 465 to align with the reinforcing bar or weld, thereby supporting the base 1 and increasing the axial support range to further enhance the stability of the base 1. Then, the drive motor 463 drives the roller 464 to rotate, driving the base 1 to reciprocate inside the steel pipe. During the movement, the battery 47 supplies power to the air suction device, allowing the air inside the roller 464 to be discharged through the fixed pipe 468 and the suction pipe 469. The air at the area to be welded carries impurities and enters the roller 464 through the annular groove 465 and the suction hole 466. The filter screen 467 then filters the impurities back into the steel pipe, thereby improving the welding quality inside the steel pipe through pre-cleaning of the area to be welded.

[0044] This invention also discloses a method for operating an automatic pipe inner wall welding device, specifically including the following steps:

[0045] Step 1: First, on the outside of one end of the pipe, according to the number and position of the reinforcing bars in the steel cage, turn the screw ring 37 to change its position on the ring rod 34, and through the elastic extension and contraction of the compression spring 36, make the arc plate 33 slide along the arc surface of the base 1 to change the orientation of the clamping wheel 9 so that the clamping wheel 9 can be radially aligned with the reinforcing bar.

[0046] Step 2: Twist the worm 11 with the rib 12, and through the meshing of the worm 11 and the worm wheel 10, the worm wheel 10 drives the corresponding gear 6 to rotate through the rotating rod 5 on one side. Through the meshing of the two gears 6, the two corresponding rotating bars 7 drive the clamping wheel 9 to spread out in a figure-eight shape through the clamping frame 8. Adjust the distance between the clamping wheel 9 and the base 1, and then place the base 1 inside the pipe through the cooperation of the clamping wheel 9 and the steel bar.

[0047] Step 3: After the base 1 enters the pipe, the output end of the rotary motor 45 drives the support plate 44 to rotate, so that the laser welder 43 and the roller 464 face the place to be welded. Then, through the extension and retraction of the output end of the telescopic rod 461, the roller 464 is brought into contact with the outside of the place to be welded. Subsequently, the drive motor 463 drives the roller 464 to rotate, so as to push the base 1 to move inside the pipe. At the same time, the linear motor 42 slides along the slide rail 41 to drive the laser welder 43 to approach the place to be welded, and performs continuous welding by following the movement of the base 1.

[0048] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic pipe inner wall welding device, comprising a base (1), characterized in that: The support mechanism includes a bracket (2), the body of which is rotatably connected to two rotating rods (5), and gears (6) are fixedly connected to the outside of the two rotating rods (5). The outer surfaces of the two gears (6) mesh with each other, and rotating bars (7) are fixedly connected to the outer surfaces of the two gears (6). The two rotating bars (7) are opened in a V-shape through the meshing of the two gears (6) to adapt to pipes with different inner diameters. One end of each of the two rotating bars (7) is fixedly connected to a clamp (8), and the outer surface of each of the two clamps (8) is rotatably connected to a clamping wheel (9). The clamping wheel (9) interacts with the steel bars inside the pipe. Adjustment component (3), which is set on the arc surface of base (1), is used to adjust the orientation of clamping wheel (9) to accommodate different numbers of steel bars. The adjustment component (3) includes an arc groove (31), which is opened on the outer arc surface of base (1). An arc block (32) is slidably connected inside the arc groove (31). An arc plate (33) is fixedly connected to the outer surface of the arc block (32). One side of the outer surface of the arc plate (33) is movably connected to the outer arc surface of base (1), and the other side of the outer surface of the arc plate (33) is connected to the outer surface of bracket (2). The main body of the arc plate (33) is slidably connected to a ring rod (34), and the outer surface of the ring rod (34) is fixedly connected to a fixed plate (35). The outer surface of the fixed plate (35) is fixedly connected to the outer arc surface of the base (1). A compression spring (36) is sleeved on the outside of the ring rod (34). The two ends of the compression spring (36) are fixedly connected to the outer surfaces of the fixed plate (35) and the arc plate (33) respectively. A threaded ring (37) is threaded on the outer surface of the ring rod (34), and the outer surface of the threaded ring (37) is movably connected to the outer surface of the arc plate (33). Welding assembly (4), which is disposed on the outside of one side of the surface of the base (1), and performs welding on the inside of the pipe by moving synchronously with the base (1).

2. The automatic pipe inner wall welding equipment according to claim 1, characterized in that: One of the rotating rods (5) has a worm gear (10) fixedly connected through its outer surface. A worm (11) meshes with the outer surface of the worm gear (10). One end of the worm (11) is rotatably connected to the outer surface of the bracket (2). The other end of the worm (11) is fixedly connected through a rib (12).

3. The automatic pipe inner wall welding equipment according to claim 1, characterized in that: The welding assembly (4) includes a slide rail (41), which is located on the outside of one side of the outer surface of the base (1). A linear motor (42) is slidably connected to the outer surface of the slide rail (41), and a laser welder (43) is fixedly connected to the outer surface of the linear motor (42).

4. The automatic pipe inner wall welding equipment according to claim 3, characterized in that: A support plate (44) is fixedly connected to the outer surface of the slide rail (41), and a rotary motor (45) is fixedly connected to the outer surface of the support plate (44). The outer surface of the rotary motor (45) is embedded and fixedly connected to one side of the outer surface of the base (1). A storage battery (47) is fixedly connected to the outer surface of the support plate (44). The output end of the storage battery (47) is electrically connected to the input end of the rotary motor (45) and the laser welder (43), respectively.

5. The automatic pipe inner wall welding equipment according to claim 4, characterized in that: A drive unit (46) is provided on the outside of the support plate (44). The drive unit (46) includes a telescopic rod (461). One end of the telescopic rod (461) is fixedly connected to the outer surface of the support plate (44). A connecting frame (462) is fixedly connected to the output end of the telescopic rod (461). A drive motor (463) is fixedly connected to the outer surface of the connecting frame (462). The output end of the drive motor (463) is rotatably connected to the body of the connecting frame (462). A roller (464) is fixedly connected to the output end of the drive motor (463).

6. The automatic pipe inner wall welding equipment according to claim 5, characterized in that: The outer surface of the roller (464) is provided with an annular groove (465), and the inside of the annular groove (465) is connected to a suction hole (466). The suction hole (466) is opened on the body of the roller (464) and is connected to the inside of the roller (464). A filter screen (467) is fixedly connected inside the roller (464). A fixed tube (468) is connected through the inside of the roller (464). One end of the fixed tube (468) is rotatably connected through the body of the bracket (2) and extends to the outside of the bracket (2). A suction tube (469) is sleeved on one end of the fixed tube (468). One end of the suction tube (469) is embedded and fixedly connected to the outer surface of the bracket (2).

7. A method for operating an automatic pipe inner wall welding device, employing the automatic pipe inner wall welding device as described in any one of claims 1-6, characterized in that: Specifically, the following steps are included: Step 1: First, on the outside of one end of the pipe, according to the number and position of the reinforcing bars in the steel cage, turn the screw ring (37) to change its position on the ring rod (34), and through the elastic extension and contraction of the compression spring (36), make the arc plate (33) slide along the arc surface of the base (1) to change the orientation of the clamping wheel (9) so that the clamping wheel (9) can be radially aligned with the reinforcing bar. Step 2: Twist the worm (11) with the rib (12), and through the meshing of the worm (11) and the worm wheel (10), the worm wheel (10) drives the corresponding gear (6) to rotate through the rotating rod (5) on one side. Through the meshing of the two gears (6), the two corresponding rotating bars (7) drive the clamping wheel (9) to unfold in a figure eight shape through the clamp (8). Adjust the distance between the clamping wheel (9) and the base (1). Then, through the cooperation of the clamping wheel (9) and the steel bar, place the base (1) inside the pipe. Step 3: After the base (1) enters the pipe, the output end of the rotary motor (45) drives the support plate (44) to rotate, so that the laser welder (43) and the roller (464) face the place to be welded. Then, through the extension and retraction of the output end of the telescopic rod (461), the roller (464) is brought into contact with the outside of the place to be welded. Then, the drive motor (463) drives the roller (464) to rotate, so as to push the base (1) to move inside the pipe. At the same time, the linear motor (42) slides along the slide rail (41) to drive the laser welder (43) to approach the place to be welded, and to perform continuous welding by following the movement of the base (1).

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