Elbow welding fixing device

Abstract

The invention relates to the technical field of elbow welding and fixing, and discloses an elbow welding and fixing device which comprises a bottom frame, a first machining frame is fixedly connected to the top of the bottom frame, a sliding frame is slidably connected to the inner wall of the bottom frame, a second machining frame is fixedly connected to the top of the sliding frame, and a hydraulic rod is fixedly connected to the top of the bottom frame. The telescopic end of the hydraulic rod is fixedly connected with the lower surface of the second machining frame, and a support is fixedly connected to the surface of the bottom frame. A pull rod can pull a spring to expand when moving downwards, a bent pipe is limited through the elasticity of the spring, the bent pipe can slowly move downwards after making contact with a stabilizing plate, the feeding stability of the bent pipe is improved, the pull rod can pull the center of a triangular frame to move downwards when moving downwards, and the bent pipe can be stably fed. And when the center of the triangular frame moves, the end parts of the triangular frame move close to each other, and when the end parts of the triangular frame move, the extrusion plates are pulled to move close to each other, so that the triangular frame is used for pushing the extrusion plates to extrude and fix the bent pipe, and the convenience of feeding and fixing of the bent pipe is improved.

Description

Technical Field

[0001] This invention relates to the field of elbow welding and fixing technology, specifically to an elbow welding and fixing device. Background Technology

[0002] Elbows, also known as 90-degree elbows or right-angle bends, are pipe fittings used in pipeline systems to change the direction of pipes. They are mainly used in the field of plumbing installation and are widely used in chemical, construction, petroleum, power, natural gas transmission, municipal engineering and shipbuilding industries. In pipeline systems, they play the role of changing direction and connecting different pipe diameters. They are also known as butt-welded elbows and other industrial names. Existing elbow welding fixing devices, such as the "elbow welding fixing device and pipe fitting processing device" disclosed in patent document CN217254067U, involve a base, a rotating disk rotatably mounted on the base, and first fixing components for fixing straight pipe sections on both the base and the rotating disk, with a second fixing component for fixing the elbow at the center of rotation. The core technology lies in adjusting the relative angle between the two first fixing components by rotating the rotating disk to accommodate the welding requirements of elbows with different angles, thereby improving the device's versatility. This patent document solves the angle adaptation problem through the design of a rotating disc. However, when adjusting the angle of the elbow pipe, the tightness between the locking bolt and the elbow pipe needs to be adjusted manually. After the angle of the elbow pipe is adjusted, the worker also needs to tighten the locking bolt to fix the elbow pipe. This locking method requires turning the locking bolt every time the elbow pipe is adjusted, which is cumbersome and affects the welding efficiency of the elbow pipe. Summary of the Invention

[0003] The purpose of this invention is to provide a welding and fixing device for elbows to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a welding and fixing device for elbows, comprising a base frame, a processing frame one fixedly connected to the top of the base frame, a slide rail slidably connected to the inner wall of the base frame, a processing frame two fixedly connected to the top of the slide rail, a hydraulic rod fixedly connected to the top of the base frame, the telescopic end of the hydraulic rod being fixedly connected to the lower surface of the processing frame two, a bracket fixedly connected to the surface of the base frame, a monitoring device installed on the top of the inner wall of the bracket, a base installed on the bottom of the inner wall of the bracket, a welding robot installed on the top of the base, and a pipe bending fixing component provided on the surface of the processing frame two. The pipe bending fixing component includes a driving device. The end of the driving device is fixedly connected to the inner wall of the second processing frame. A fixing plate is fixedly connected to the output end of the driving device. A positioning groove is opened at the end of the fixing plate away from the driving device. A shrinkage groove is opened inside the fixing plate. A sliding rod is slidably connected to the inner wall of the fixing plate. An extrusion plate is fixedly connected to the end of the sliding rod. A tripod is sleeved on the surface of the extrusion plate. A pull rod is hinged to the center of the tripod. A round rod is fixedly connected to the end of the pull rod away from the tripod. A stabilizing plate is fixedly connected to the top of the round rod. A support plate is fixedly connected to the lower surface of the fixing plate. A spring is fixedly connected to the bottom of the support plate. The bottom of the spring is fixedly connected to the surface of the pull rod. A working groove is opened inside the fixing plate. A pipe bending component is arranged inside the positioning groove. An extrusion component is arranged on the surface of the fixing plate. A straight pipe fixing component is arranged on the surface of the first processing frame.

[0005] Furthermore, the output end of the drive device passes through the second processing frame and extends to the outer end of the second processing frame. The end of the fixed plate near the drive device is rotatably connected to the surface of the second processing frame. There are two extrusion plates, which are symmetrically arranged with the bend as the center.

[0006] Furthermore, the surface of the extrusion plate is adapted to the inner wall of the shrinkage groove, one end of the two extrusion plates that are close to each other contacts the upper surface of the bend, the end of the slide rod away from the extrusion plate passes through the fixed plate and extends to the outer end of the fixed plate, the tripod is located inside the working groove, and the center of the tripod is located below its end.

[0007] Furthermore, the bottom of the pull rod passes through the fixed plate and extends to the outer end of the fixed plate, the bottom of the bent tube contacts the top of the stabilizing plate, and the bottom of the stabilizing plate contacts the top of the support plate.

[0008] Furthermore, the extrusion component includes a rotating rod, the end of which is rotatably connected to the inner wall of the fixed disk. A pressure plate is fixedly connected to the surface of the rotating rod. A protective frame is fixedly connected to the upper surface of the fixed disk. A grooved disk is fixedly connected to the surface of the rotating rod. A toothed plate engages with the surface of the grooved disk. A linkage frame is fixedly connected to the bottom of the toothed plate. An electric rod is fixedly connected to the bottom of the fixed disk. The bottom of the electric rod is fixedly connected to the surface of the linkage frame.

[0009] Furthermore, the end of the rotating rod near the pressure plate passes through the fixed disk and extends to the outer end of the fixed disk. The pressure plate is located at the outer end of the fixed disk, and the surface of the pressure plate is in contact with the surface of the bent pipe. The grooved disk is located inside the fixed disk, and the surface of the toothed plate is slidably connected to the inner wall of the fixed disk.

[0010] Furthermore, the surface of the toothed plate is adapted to the inner wall of the protective frame, the bottom of the toothed plate penetrates through the fixed plate and extends to the outer end of the fixed plate, and there are two pressure plates, which are symmetrically arranged with the bend as the center and are staggered.

[0011] Furthermore, the straight tube fixing component includes a slide rail, which is fixedly connected to the surface of the processing frame. A lifting frame is slidably connected to the surface of the slide rail. A mounting plate is fixedly connected to the end of the lifting frame away from the slide rail. A circular groove frame is fixedly connected to the end of the mounting plate away from the lifting frame. An electric push rod is fixedly connected to the end of the mounting plate near the lifting frame. The upper surface of the electric push rod is fixedly connected to the surface of the processing frame. A bidirectional extension rod is fixedly connected to the end of the circular groove frame near the mounting plate. A synchronous plate is fixedly connected to the telescopic end of the bidirectional extension rod. A clamping plate is fixedly connected to the end of the synchronous plate. A semi-circular groove is formed on the surface of the clamping plate. An adapter hole is formed on the surface of the circular groove frame. A straight tube is arranged inside the circular groove frame.

[0012] Furthermore, the slide rails are provided in two quantities, and the two slide rails are symmetrically arranged with the processing frame as the center. The end of the synchronous plate away from the bidirectional extension rod passes through the circular groove frame and extends into the interior of the circular groove frame.

[0013] Furthermore, there are two clamping plates, which are symmetrically arranged vertically around the straight tube. The surface of the straight tube contacts the inner wall of the semi-circular groove, and the surface of the clamping plate is adapted to the inner wall of the adapter hole.

[0014] The present invention has the following beneficial effects: When the pull rod moves downward, it pulls the spring to expand, using the spring's elasticity to limit the bending tube, allowing it to slowly move downward after contacting the stabilizing plate, thus improving the stability of the bending tube loading. The downward movement of the pull rod also pulls the center of the tripod downward, causing its ends to move closer together. These ends pull the extrusion plates closer together, thereby using the tripod to push the extrusion plates to press and fix the bending tube, improving the convenience of loading and fixing the bending tube. The moving extrusion plates also pull the sliding rod to slide inside the fixing plate, using the fixing plate to improve the stability of the extrusion plates during fixing. The stabilizing plate supports the bottom of the bending tube, further improving the stability of the bent tube after fixing.

[0015] When the rotating rod of this invention rotates, it pushes the pressure plate to contact the lower surface of the bend. The pressure plate clamps and fixes the lower surface of the bend, further improving the stability of the bend during welding. The pressure plate fixes the bend to the top of the stabilizing plate with pressure, improving the stability between the bend and the stabilizing plate, preventing the bend from falling off when the fixing plate rotates, and improving the stability after the bend and straight pipe are connected.

[0016] This invention features a semi-circular groove on the surface of the clamping plate. This groove serves to limit the straight pipe, allowing the clamping plate to hold and fix the straight pipe at the center of the circular groove frame. This facilitates the butt welding of the bent pipe and the straight pipe. During operation, the electric actuator pushes the circular groove frame to move up and down, ensuring that the end of the straight pipe better aligns with the end of the bent pipe for easier welding. The mounting plate slides on the surface of the slide rail via a lifting frame, which limits the circular groove frame and improves the stability of the circular groove frame's support for the straight pipe.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support structure of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention; Figure 4 This is a schematic diagram of the overall structure of the fixing component of the present invention; Figure 5 This is a schematic diagram of another structure of the fixing component of the present invention; Figure 6 This is a schematic diagram of the overall structure of the extrusion component of the present invention; Figure 7 This is another structural schematic diagram of the extrusion component of the present invention; Figure 8 This is a schematic diagram of the overall structure of the straight pipe fixing component of the present invention; Figure 9 This is another structural schematic diagram of the straight pipe fixing component of the present invention; Figure 10 This is a schematic diagram of the clamping plate structure of the present invention.

[0020] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Base frame; 2. Processing rack two; 3. Slide; 4. Hydraulic rod; 5. Support; 6. Monitoring device; 7. Processing rack one; 8. Base; 9. Welding robot; 10. Fixing component; 11. Extrusion component; 12. Straight pipe fixing component; 20. Drive device; 21. Slide rod; 22. Positioning groove; 23. Shrinkage groove; 24. Bend; 25. Extrusion plate; 26. Fixing plate; 27. Working groove; 28. Tripod; 29. ​​Tie rod 30. Spring; 31. Round rod; 32. Support plate; 33. Stabilizing plate; 40. Pressure plate; 41. Rotating rod; 42. Protective frame; 43. Grooved plate; 44. Toothed plate; 45. Linkage frame; 46. Electric rod; 50. Slide rail; 51. Lifting frame; 52. Mounting plate; 53. Synchronizing plate; 54. Bidirectional extension rod; 55. Electric actuator; 56. Round groove frame; 57. Adapter hole; 58. Semi-circular groove; 59. Straight tube; 60. Clamping plate. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-10 As shown, the present invention is a elbow welding and fixing device, including a base frame 1, a processing frame 7 fixedly connected to the top of the base frame 1, a slide 3 slidably connected to the inner wall of the base frame 1, a processing frame 2 fixedly connected to the top of the slide 3, a hydraulic rod 4 fixedly connected to the top of the base frame 1, the telescopic end of the hydraulic rod 4 fixedly connected to the lower surface of the processing frame 2, a bracket 5 fixedly connected to the surface of the base frame 1, a monitoring device 6 installed on the top of the inner wall of the bracket 5, a base 8 installed on the bottom of the inner wall of the bracket 5, a welding robot 9 installed on the top of the base 8, and a bend fixing component 10 provided on the surface of the processing frame 2. The pipe bending fixing component 10 includes a drive device 20. The end of the drive device 20 is fixedly connected to the inner wall of the processing frame 2. A fixing plate 26 is fixedly connected to the output end of the drive device 20. A positioning groove 22 is provided at the end of the fixing plate 26 away from the drive device 20. A shrinkage groove 23 is provided inside the fixing plate 26. A slide rod 21 is slidably connected to the inner wall of the fixing plate 26. An extrusion plate 25 is fixedly connected to the end of the slide rod 21. A tripod 28 is sleeved on the surface of the extrusion plate 25. A pull rod 29 is hinged to the center of the tripod 28. A round rod 31 is fixedly connected to the end of the pull rod 29 away from the tripod 28. A stabilizing plate 33 is fixedly connected to the top of the round rod 31. A support plate 32 is fixedly connected to the lower surface of the fixing plate 26. A spring 30 is fixedly connected to the bottom of the support plate 32. The bottom of the spring 30 is fixedly connected to the surface of the pull rod 29. The fixed plate 26 has a working groove 27 inside, and the positioning groove 22 has a bent tube 24 inside. When the pull rod 29 moves downward, it pulls the spring 30 to expand. The elasticity of the spring 30 limits the bent tube 24, so that the bent tube 24 can slowly move downward after contacting the stabilizing plate 33, improving the stability of the bent tube 24 loading. When the pull rod 29 moves downward, it pulls the center of the tripod 28 to move downward. When the center of the tripod 28 moves, its ends move closer to each other. When the ends of the tripod 28 move, they pull the extrusion plate 25 to move closer to each other. Thus, the tripod 28 pushes the extrusion plate 25 to extrude and fix the bent tube 24, improving the convenience of loading and fixing the bent tube 24. The surface of the fixed plate 26 is provided with an extrusion component 11, and the surface of the processing frame 7 is provided with a straight tube fixing component 12.

[0023] The output end of the drive device 20 passes through the processing frame 2 and extends to the outer end of the processing frame 2. The end of the fixed plate 26 near the drive device 20 is rotatably connected to the surface of the processing frame 2. There are two extrusion plates 25, which are symmetrically arranged with the bent tube 24 as the center.

[0024] The surface of the extrusion plate 25 is adapted to the inner wall of the shrinkage groove 23. The ends of the two extrusion plates 25 that are close to each other are in contact with the upper surface of the bend 24. The end of the slide rod 21 that is away from the extrusion plate 25 passes through the fixed plate 26 and extends to the outer end of the fixed plate 26. The tripod 28 is located inside the working groove 27, and the center of the tripod 28 is located below its end.

[0025] The bottom of the pull rod 29 passes through the fixed plate 26 and extends to the outer end of the fixed plate 26. The bottom of the bend 24 contacts the top of the stabilizing plate 33, and the bottom of the stabilizing plate 33 contacts the top of the support plate 32.

[0026] The extrusion component 11 includes a rotating rod 41, the end of which is rotatably connected to the inner wall of the fixed plate 26. A pressure plate 40 is fixedly connected to the surface of the rotating rod 41. A protective frame 42 is fixedly connected to the upper surface of the fixed plate 26. A grooved plate 43 is fixedly connected to the surface of the rotating rod 41. A toothed plate 44 engages with the surface of the grooved plate 43. A linkage frame 45 is fixedly connected to the bottom of the toothed plate 44. An electric rod 46 is fixedly connected to the bottom of the fixed plate 26. The bottom of the electric rod 46 is fixedly connected to the surface of the linkage frame 45. When the rotating rod 41 rotates, it pushes the pressure plate 40 to contact the lower surface of the bent tube 24. The pressure plate 40 clamps and fixes the lower surface of the bent tube 24, further improving the stability of the bent tube 24 during welding. The pressure plate 40 fixes the bent tube 24 to the top of the stabilizing plate 33 with pressure, improving the stability between the bent tube 24 and the stabilizing plate 33 and preventing the bent tube 24 from falling off when the fixed plate 26 rotates.

[0027] One end of the rotating rod 41 near the pressure plate 40 passes through the fixed plate 26 and extends to the outer end of the fixed plate 26. The pressure plate 40 is located at the outer end of the fixed plate 26. The surface of the pressure plate 40 is in contact with the surface of the bent tube 24. The grooved plate 43 is located inside the fixed plate 26. The surface of the toothed plate 44 is slidably connected to the inner wall of the fixed plate 26.

[0028] The surface of the toothed plate 44 is adapted to the inner wall of the protective frame 42. The bottom of the toothed plate 44 passes through the fixed plate 26 and extends to the outer end of the fixed plate 26. There are two pressure plates 40. The two pressure plates 40 are symmetrically arranged with the bend 24 as the center, and the two pressure plates 40 are staggered.

[0029] The straight pipe fixing component 12 includes a slide rail 50, which is fixedly connected to the surface of the processing frame 7. A lifting frame 51 is slidably connected to the surface of the slide rail 50. A mounting plate 52 is fixedly connected to the end of the lifting frame 51 away from the slide rail 50. A circular groove frame 56 is fixedly connected to the end of the mounting plate 52 away from the lifting frame 51. An electric push rod 55 is fixedly connected to the end of the mounting plate 52 near the lifting frame 51. The upper surface of the electric push rod 55 is fixedly connected to the surface of the processing frame 7. A bidirectional extension rod 54 is fixedly connected to the end of the circular groove frame 56 near the mounting plate 52. A synchronous plate 53 is fixedly connected to the telescopic end of the bidirectional extension rod 54. A clamping plate 60 is fixedly connected to the end of the synchronous plate 53. The surface of the 0 has a semi-circular groove 58, the surface of the circular groove frame 56 has an adapter hole 57, the inside of the circular groove frame 56 has a straight tube 59, the surface of the clamping plate 60 has a semi-circular groove 58, the semi-circular groove 58 serves to limit the straight tube 59, so that the clamping plate 60 will clamp and fix the straight tube 59 at the center of the circular groove frame 56, so that the bent tube 24 and the straight tube 59 can be butt welded. When the electric push rod 55 is working, it will push the circular groove frame 56 to move up and down, so that the straight tube 59 can better correspond to the end of the bent tube 24, which is convenient for welding. The mounting plate 52 slides on the surface of the slide rail 50 through the lifting frame 51, and the lifting frame 51 limits the circular groove frame 56.

[0030] There are two slide rails 50, which are symmetrically arranged with the processing frame 7 as the center. The end of the synchronous plate 53 away from the bidirectional extension rod 54 passes through the circular groove frame 56 and extends into the interior of the circular groove frame 56.

[0031] There are two clamping plates 60. The two clamping plates 60 are symmetrically arranged vertically around the straight tube 59. The surface of the straight tube 59 is in contact with the inner wall of the semi-circular groove 58, and the surface of the clamping plate 60 is adapted to the inner wall of the adapter hole 57.

[0032] In use, the operator transports the bent pipe 24 to the top of the fixed plate 26 using a crane or other hoisting equipment. The operator then slowly lowers the bent pipe 24 into the positioning groove 22. As the bent pipe 24 slides within the positioning groove 22, it contacts the top of the stabilizing plate 33. Under pressure, the stabilizing plate 33 pushes the pull rod 29 downwards via the round rod 31. As the pull rod 29 moves downwards, it pulls the spring 30 to expand, using the elasticity of the spring 30 to limit the bending pipe 24. This allows the bent pipe 24 to slowly descend after contacting the stabilizing plate 33, improving the stability of the bent pipe 24 during loading. When the center of the tripod 28 is pulled downward, the ends of the tripod 28 move closer to each other. When the ends of the tripod 28 move, they pull the extrusion plate 25 closer to each other. Thus, the tripod 28 pushes the extrusion plate 25 to extrude and fix the bent pipe 24, improving the convenience of feeding and fixing the bent pipe 24. When the extrusion plate 25 moves, it pulls the slide bar 21 to slide inside the fixing plate 26. The fixing plate 26 improves the stability of the extrusion plate 25 during the fixing operation. The stabilizing plate 33 supports the bottom of the bent pipe 24, further improving the stability of the bent pipe 24 after it is fixed. After the extrusion plate 25 fixes the bend 24, the electric rod 46 is activated to push the linkage frame 45 upward. When the linkage frame 45 moves, it pushes the toothed plate 44 to move. When the toothed plate 44 moves, it drives the rotating rod 41 to rotate by meshing with the grooved plate 43. When the rotating rod 41 rotates, it pushes the pressure plate 40 to contact the lower surface of the bend 24. The pressure plate 40 clamps and fixes the lower surface of the bend 24, further improving the stability of the bend 24 during welding. The pressure plate 40 fixes the bend 24 to the top of the stabilizing plate 33 by pressure, improving the stability between the bend 24 and the stabilizing plate 33, preventing the bend 24 from falling off when the fixing plate 26 rotates, and improving the stability of the bend 24 after it is connected to the straight pipe 59. After the operator places the straight tube 59 into the circular slot frame 56, the bidirectional extension rod 54 is activated to begin the retraction operation. During the retraction operation, the bidirectional extension rod 54 pushes the two clamping plates 60 closer together via the synchronous plate 53. When the clamping plates 60 come closer together, they fix the end of the straight tube 59 inside the circular slot frame 56, improving the stability of the straight tube 59 after fixation. A semi-circular groove 58 is formed on the surface of the clamping plate 60, which serves to limit the movement of the straight tube 59. The clamping plate 60 clamps and fixes the straight pipe 59 at the center of the circular groove frame 56 so that the bent pipe 24 and the straight pipe 59 can be butt welded. During operation, the electric push rod 55 pushes the circular groove frame 56 to move up and down so that the straight pipe 59 can better correspond to the end of the bent pipe 24, making it easier to weld. The mounting plate 52 slides on the surface of the slide rail 50 through the lifting frame 51. The lifting frame 51 limits the circular groove frame 56 and improves the stability of the circular groove frame 56 in supporting the straight pipe 59. After the bend 24 and the straight pipe 59 are connected, the hydraulic rod 4 is activated to push the processing frame 2 towards the processing frame 7. As the processing frame 2 moves, it pushes the bend 24 to connect with the straight pipe 59. After the connection is complete, the welding robot 9 is activated to perform the welding process, improving the ease of welding the bend 24. A monitoring device 6 is installed on the top of the bracket 5 to monitor the position of the bend 24 and the straight pipe 59, ensuring a stable connection for welding. Once one side of the bend 24 and the straight pipe 59 is welded, the clamping plate 60 separates from the straight pipe 59 and moves into the fitting hole 57. The inner ring of the circular groove frame 56 is larger than the outer wall of the fixed plate 26. When the drive device 20 is started and the fixed plate 26 is rotated, the bent tube 24 will rotate the straight tube 59 inside the circular groove frame 56 under the clamping action, so as to weld the other side of the bent tube 24. After the straight tube 59 is flipped, it is clamped and fixed by the clamping plate 60 to improve the stability of the bent tube 24 during welding. When the welded bent tube 24 needs to be unloaded, the toothed plate 44 moves downward to push the rotating rod 41 to reverse. When the rotating rod 41 reverses, it pulls the pressure plate 40 to separate from the bent tube 24. When the bent tube 24 is pulled upward, the pull rod 29 uses the elasticity of the spring 30 to reset and push the extrusion plate 25 to separate from the bent tube 24. At this time, the welded bent tube 24 can be taken out, which improves the convenience of unloading the bent tube 24.

[0033] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A welding and fixing device for elbows, comprising a base frame (1), wherein a processing frame one (7) is fixedly connected to the top of the base frame (1), a slide (3) is slidably connected to the inner wall of the base frame (1), and a processing frame two (2) is fixedly connected to the top of the slide (3), characterized in that, The surface of the processing rack 2 (2) is provided with a bent pipe fixing component (10); The pipe bending fixing component (10) includes a driving device (20). The end of the driving device (20) is fixedly connected to the inner wall of the processing frame (2). The output end of the driving device (20) is fixedly connected to a fixing plate (26). A positioning groove (22) is provided at the end of the fixing plate (26) away from the driving device (20). A shrinkage groove (23) is provided inside the fixing plate (26). A slide rod (21) is slidably connected to the inner wall of the fixing plate (26). An extrusion plate (25) is fixedly connected to the end of the slide rod (21). A tripod (28) is sleeved on the surface of the extrusion plate (25). A pull rod (29) is hinged to the center of the tripod (28). The end of the pull rod (29) away from the tripod (28) is fixedly connected to a round rod (31). The top of the round rod (31) is fixedly connected to a stabilizing plate (33). The lower surface of the fixed plate (26) is fixedly connected to a support plate (32). The bottom of the support plate (32) is fixedly connected to a spring (30). The bottom of the spring (30) is fixedly connected to the surface of the pull rod (29). The fixed plate (26) has a working groove (27) inside. The positioning groove (22) has a bent tube (24) inside. The surface of the fixed plate (26) has an extrusion component (11). The surface of the processing frame (7) has a straight tube fixing component (12).

2. The elbow welding and fixing device according to claim 1, characterized in that: A hydraulic rod (4) is fixedly connected to the top of the base frame (1). The telescopic end of the hydraulic rod (4) is fixedly connected to the lower surface of the processing frame (2). A bracket (5) is fixedly connected to the surface of the base frame (1). A monitoring device (6) is installed on the top of the inner wall of the bracket (5). A base (8) is installed on the bottom of the inner wall of the bracket (5). A welding robot (9) is installed on the top of the base (8). The output end of the drive device (20) passes through the processing frame (2) and extends to the outer end of the processing frame (2). The fixed plate (26) is rotatably connected to the surface of the processing frame (2) at one end near the drive device (20). There are two extrusion plates (25). The two extrusion plates (25) are symmetrically arranged with the bend (24) as the center.

3. The elbow welding and fixing device according to claim 2, characterized in that: The surface of the extrusion plate (25) is adapted to the inner wall of the shrinkage groove (23). The two extrusion plates (25) are close to each other at one end and contact the upper surface of the bend (24). The end of the slide rod (21) away from the extrusion plate (25) passes through the fixed plate (26) and extends to the outer end of the fixed plate (26). The tripod (28) is located inside the working groove (27), and the center of the tripod (28) is located below its end.

4. The elbow welding and fixing device according to claim 3, characterized in that: The bottom of the pull rod (29) passes through the fixed plate (26) and extends to the outer end of the fixed plate (26). The bottom of the bend (24) contacts the top of the stabilizing plate (33). The bottom of the stabilizing plate (33) contacts the top of the support plate (32).

5. The elbow welding and fixing device according to claim 4, characterized in that: The extrusion component (11) includes a rotating rod (41), the end of which is rotatably connected to the inner wall of the fixed disk (26). A pressure plate (40) is fixedly connected to the surface of the rotating rod (41). A protective frame (42) is fixedly connected to the upper surface of the fixed disk (26). A grooved disk (43) is fixedly connected to the surface of the rotating rod (41). A toothed plate (44) meshes with the surface of the grooved disk (43). A linkage frame (45) is fixedly connected to the bottom of the toothed plate (44). An electric rod (46) is fixedly connected to the bottom of the fixed disk (26). The bottom of the electric rod (46) is fixedly connected to the surface of the linkage frame (45).

6. The elbow welding and fixing device according to claim 5, characterized in that: The end of the rotating rod (41) near the pressure plate (40) passes through the fixed disk (26) and extends to the outer end of the fixed disk (26). The pressure plate (40) is located at the outer end of the fixed disk (26). The surface of the pressure plate (40) is in contact with the surface of the bent pipe (24). The grooved disk (43) is located inside the fixed disk (26). The surface of the toothed plate (44) is slidably connected to the inner wall of the fixed disk (26).

7. The elbow welding and fixing device according to claim 6, characterized in that: The surface of the toothed plate (44) is adapted to the inner wall of the protective frame (42). The bottom of the toothed plate (44) passes through the fixed plate (26) and extends to the outer end of the fixed plate (26). There are two pressure plates (40). The two pressure plates (40) are symmetrically arranged with the bend (24) as the center, and the two pressure plates (40) are staggered.

8. The elbow welding and fixing device according to claim 7, characterized in that: The straight pipe fixing component (12) includes a slide rail (50), which is fixedly connected to the surface of the processing frame (7). A lifting frame (51) is slidably connected to the surface of the slide rail (50). A mounting plate (52) is fixedly connected to one end of the lifting frame (51) away from the slide rail (50). A circular groove frame (56) is fixedly connected to one end of the mounting plate (52) away from the lifting frame (51). An electric push rod (55) is fixedly connected to one end of the mounting plate (52) near the lifting frame (51). The upper surface of the circular slot frame (56) is fixedly connected to the surface of the processing frame (7). A bidirectional extension rod (54) is fixedly connected to one end of the circular slot frame (56) near the mounting plate (52). A synchronous plate (53) is fixedly connected to the telescopic end of the bidirectional extension rod (54). A clamping plate (60) is fixedly connected to the end of the synchronous plate (53). A semi-circular groove (58) is opened on the surface of the clamping plate (60). An adapter hole (57) is opened on the surface of the circular slot frame (56). A straight tube (59) is provided inside the circular slot frame (56).

9. The elbow welding and fixing device according to claim 8, characterized in that: The number of the slide rails (50) is set to two, and the two slide rails (50) are symmetrically arranged with the processing frame (7) as the center. The end of the synchronous plate (53) away from the bidirectional extension rod (54) passes through the circular groove frame (56) and extends into the interior of the circular groove frame (56).

10. A bend welding and fixing device according to claim 9, characterized in that: The number of clamping plates (60) is set to two. The two clamping plates (60) are symmetrically arranged above and below the straight tube (59) as the center. The surface of the straight tube (59) is in contact with the inner wall of the semi-circular groove (58), and the surface of the clamping plate (60) is adapted to the inner wall of the adapter hole (57).

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