Welding equipment and welding method for annular section of large-diameter TA31 pipe

Abstract

The invention discloses welding equipment and a welding method for an annular section of a large-diameter TA31 pipe, and relates to the technical field of welding equipment. The welding device comprises fixing cylinders, the interiors of the two fixing cylinders are fixedly connected with fixing assemblies, the inner side face of a welding mechanism is fixedly connected with the outer side faces of the fixing cylinders, a lifting assembly is fixedly connected to the side, away from supporting legs, of a bottom plate, and the side, away from the bottom plate, of the lifting assembly is fixedly connected with the outer side faces, away from the bottom plate, of the fixing cylinders. The outer side face, close to the bottom plate, of the fixing cylinder is fixedly connected with a plate body, the discharging assembly is fixedly connected with the side, away from the plate body, of the bottom plate, argon is filled, material oxidation caused by oxygen, nitrogen and other gas impurities in the welding process can be avoided, weld metal is high in purity and few in impurity, and the strength, toughness, corrosion resistance and other performance of a weld are improved; and meanwhile, welding slag and smoke generated by welding fall down along the fixed cylinder under the synergistic effect of gravity and argon circulation.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, and in particular to a large-diameter TA31 pipe annular cross-section welding device and a welding method. Background Art

[0002] TA31 pipe is a titanium alloy pipe, which is mainly composed of titanium and contains specific alloy elements to optimize its performance. This pipe has a relatively low density, high strength, and low thermal conductivity. The most outstanding chemical property is its excellent corrosion resistance. It can resist the erosion of seawater, acidic and alkaline solutions of a certain concentration. In terms of physical properties, in addition to the density, strength and thermal conductivity mentioned above, it also has good toughness and plasticity. In terms of processing performance, it is difficult to weld, and argon arc welding is often used under the protection of inert gas, which has high requirements for welding materials and processes.

[0003] After butt-jointing two pipes, when welding the annular welding surfaces of the two pipes, it is necessary to fill the butt joint with protective gas to protect the welding of the pipes, ensure that the protective gas is filled in the welding position and save the protective gas. It is usually necessary to cover the outside of the welding position with a protective cover. At this time, the welding produces smoke and welding slag, which are easy to adhere to the protective cover and cause blockage. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a large-diameter TA31 pipe annular section welding device and a welding method.

[0005] According to one aspect of the present invention, a large-diameter TA31 pipe annular section welding device comprises:

[0006] A bottom plate, the bottom of the bottom plate is fixedly connected with a support leg, and a side of the bottom plate away from the support leg is fixedly connected with a welding device;

[0007] The welding device comprises:

[0008] A fixing cylinder, two fixing cylinders are symmetrically arranged on the top of the bottom plate, and the insides of the two fixing cylinders are fixedly connected with fixing components;

[0009] A welding mechanism, wherein the inner side surface of the welding mechanism is fixedly connected to the outer side surface of the fixing cylinder;

[0010] A lifting assembly, the lifting assembly is fixedly connected to a side of the bottom plate away from the supporting legs, and the side of the lifting assembly away from the bottom plate is fixedly connected to an outer side surface of a fixing cylinder away from the bottom plate, and the outer side surface of the fixing cylinder close to the bottom plate is fixedly connected to a plate body;

[0011] A blanking assembly is fixedly connected to a side of the bottom plate away from the plate body.

[0012] The pipe is put into the fixed cylinder away from the bottom plate, and the pipe slides into another fixed cylinder along the fixed cylinder away from the bottom plate, and the lifting component is started. The lifting component drives the upper fixed cylinder, the welding mechanism, the lower fixed cylinder, and the plate body to rise in turn, and the fixed cylinder and the pipe move relative to each other. Finally, the end of the pipe is located in the middle of the two fixed cylinders, and the fixing component inside the fixed cylinder close to the bottom plate is started to fix the pipe. Then another pipe is inserted, and the fixing component inside the fixed cylinder away from the bottom plate is started to fix the second pipe. The ends of the two pipes are butted, and the welding mechanism is started. At the same time, argon gas is filled into the welding mechanism to serve as a protective gas. The output end of the welding mechanism rotates to perform rotational welding on the annular cross-section of the butt joint position of the two pipes. The filling of argon gas can avoid oxidation of the material caused by gas impurities such as oxygen and nitrogen during welding, so that the weld metal has high purity and less impurities, and the strength, toughness and corrosion resistance of the weld are improved. At the same time, the welding slag and fume generated by welding fall along the fixed cylinder under the synergistic effect of gravity and argon gas circulation.

[0013] Furthermore, the welding mechanism includes an outer shell, which is provided with two outer shells, and the ends of the two fixed cylinders close to each other extend to the inside of the two outer shells respectively, and the outer side surfaces of the fixed cylinders are fixedly connected to the inner side surfaces of the outer shells, a connecting pipe is fixedly connected to the side of the outer shell away from the bottom plate, and there are several connecting pipes evenly distributed along the circumference of the outer shell, a welding assembly is slidably connected at the interval between the outer shell and the fixed cylinder, and there are several welding assemblies evenly distributed along the circumference of the outer shell, a driving assembly is fixedly connected to the outer side surface of the outer shell, and the output end of the driving assembly is fixedly connected to the side of the welding assembly away from the fixed cylinder, a side of the driving assembly close to the bottom plate is fixedly connected to a side of the plate body away from the bottom plate, a guide assembly is fixedly connected to the top of the bottom plate, and the guide assembly is arranged directly below the fixed cylinder, a tube body is fixedly connected to the side of the outer shell close to the bottom plate, the tube body penetrates the plate body, and the tube body is close to the plate body. The side near the bottom plate is inclined, and the side of the bottom plate away from the supporting leg is fixedly connected with a fixing plate. The outer side surface of the tube body is fixedly connected to the inner side surface of the fixing plate, and argon gas is connected through a connecting pipe. The argon gas passes through the connecting pipe and enters the outer shell, the fixing cylinder, and the tube body. The mechanism for placing the tube blocks the end of the fixing cylinder away from the bottom plate, and the argon gas guides the fume and welding slag generated by welding. The fume and welding slag fall to the side close to the bottom plate through the fixing cylinder and the tube body. The driving assembly is started, and the output end of the driving assembly drives the welding assembly to rotate. The welding assembly is started to weld the butt joints of the ends of the two tubes. The guiding assembly is started to fix the tube. The lifting assembly is started and the tube is released. As the lifting assembly rises, the welded tube is separated from the fixing cylinder, and the guiding assembly rotates in one direction to complete the unloading of the tube, so that the tube is unloaded in a directional manner.

[0014] Furthermore, the welding assembly includes an outer scraper, the surface of the outer scraper is slidably connected to the inner side surfaces of the two outer shells, the outer scraper is fixedly connected to a connecting plate on a side away from the outer scraper, the connecting plate is slidably connected to a side where the two fixed tubes are close to each other on a side away from the outer scraper, a welding telescopic rod is symmetrically arranged on a side of the connecting plate away from the outer scraper, the surface of the welding telescopic rod is fixedly connected to the inner side surface of the connecting plate, the welding telescopic rod is fixedly connected to a welding plate on a side away from the connecting plate, and the output end of the welding telescopic rod is fixedly connected to the welding plate, and a welder is fixedly connected to a side of the welding plate away from the welding telescopic rod. When the welding telescopic rod is started, the welding telescopic rod drives the welding plate to move, thereby driving the welder to approach the butt joint of the two pipes, thereby welding pipes of different diameters, and the driving assembly drives the outer scraper to rotate, thereby driving the connecting plate, the welding telescopic rod, the welding plate, and the welder to rotate, thereby completing the welding of the annular cross-section. While welding, the outer scraper scrapes the inner side surface of the outer shell to scrape off the welding slag and fume adhered to the inner side surface of the outer shell, and finally scrapes the welding slag and fume into the inside of the pipe body to avoid clogging of the outer shell.

[0015] Furthermore, a telescopic sleeve is provided at the interval between the connecting plate and the welding plate, and two sides of the telescopic sleeve are respectively fixedly connected to the side where the connecting plate and the welding plate are close to each other, both ends of the outer scraper are fixedly connected to the inner scraper, and the sides where the two inner scrapers are close to each other are respectively fixedly connected to the surface of the connecting plate, the surface of the connecting plate is slidably connected to the inner side surface of the fixed cylinder, the welding plate moves, driving the telescopic sleeve to extend and retract, avoiding welding slag and fume contacting the welding telescopic rod and damaging the welding telescopic rod, the outer scraper rotates, driving the inner scraper to rotate, thereby scraping the outer side surface of the fixed cylinder, scraping off the fume and welding slag attached to the surface of the fixed cylinder, and dropping them to the inner side surface of the outer shell, and being swept into the inside of the tube body as the outer scraper rotates, completing the cleaning of the outer shell and the fixed cylinder during welding.

[0016] Furthermore, the driving assembly includes an outer ring cylinder, the inner side surface of the outer ring cylinder is slidably connected to the outer side surface of the outer shell, and the inner side surface of the outer ring cylinder is fixedly connected to the side of the outer scraper away from the connecting plate, the outer side surface of the outer ring cylinder is fixedly connected with a gear ring, the outer side of the gear ring is meshed with a gear, the side of the gear close to the plate body is fixedly connected with a rotating shaft, the end of the rotating shaft away from the gear is fixedly connected to a motor, and the rotating shaft is fixedly connected to the output end of the motor, the motor is started, the output end of the motor drives the rotating shaft to rotate, drives the gear to rotate, drives the gear ring to rotate, drives the outer ring cylinder to rotate, thereby driving the outer scraper to rotate, and finally drives the welder to rotate, the outer side surface of the outer ring cylinder is rotatably connected with a shield, the end of the rotating shaft close to the motor penetrates the shield, and the inner side surface of the shield is rotatably connected to the surface of the rotating shaft, the side of the shield close to the plate body is fixedly connected with a column, and two columns are symmetrically arranged at the interval between the plate body and the shield, the end of the column away from the shield is fixedly connected to the side of the plate body away from the bottom plate, the surface of the motor is fixedly connected with a fixing sleeve, the side of the fixing sleeve away from the motor is fixedly connected to the surface of the column, and the shield protects the gear ring and the gear.

[0017] Furthermore, the fixing assembly includes a fixed telescopic rod, which is fixedly connected to the inner side surface of the fixed cylinder, and a plurality of fixed telescopic rods are evenly arranged along the circumference of the fixed cylinder, and one end of the fixed telescopic rod away from the fixed cylinder is fixedly connected to a fixed block, and the side of the fixed block away from the fixed telescopic rod is fixedly connected to a fixed ring plate, the fixed ring plate is made of elastic material, and the fixed ring plate is hollow, and the fixed telescopic rod is started, the fixed telescopic rod drives the fixed block to move, drives the fixed ring plate to move, and the fixed ring plate contacts the pipe, and then the fixed ring plate is deformed to cover the surface of the pipe, thereby completing the fixation, the elastically arranged fixed ring plate can fix pipes of different sizes, and the hollow arranged fixed ring plate can better deform, thereby achieving a better fixing effect.

[0018] Furthermore, the lifting assembly includes a lifting telescopic rod, which is symmetrically arranged on a side of the base plate away from the supporting legs. A connecting sleeve is arranged on the side of the two lifting telescopic rods away from the base plate, and a bracket is arranged at the interval between the two connecting sleeves. The bracket is fixedly connected to the side of the plate body away from the base plate, and the inner side surface of the connecting sleeve is fixedly connected to the surface of the bracket, and the inner side surface of the bracket is fixedly connected to the outer side surface of the fixed tube away from the plate body. When the lifting telescopic rod is started, the lifting telescopic rod drives the connecting sleeve to move, and drives the bracket, the plate body and the two fixed tubes to move, thereby completing the adjustment of the welding position and unloading after welding is completed.

[0019] Furthermore, the unloading assembly includes a unloading barrel, which is fixedly connected to a side of the base plate away from the plate body, and is arranged directly below the fixed barrel. A connecting rod is fixedly connected to the outer side surface of the unloading barrel, and a side of the connecting rod away from the unloading barrel is fixedly connected to the supporting leg. A unloading hole is provided on the surface of the base plate, and a plurality of unloading holes are provided, and a plurality of unloading holes are provided directly below the fixed barrel. The welding slag and smoke fall along the fixed barrel, pass through the unloading holes, and are finally discharged to the bottom of the base plate through the unloading barrel, thereby completing the unloading of welding waste.

[0020] Furthermore, a side plate is provided at the interval between the plate body and the bottom plate, the two side plates are fixedly connected to a side of the bottom plate close to the plate body, the two side plates close to each other are fixedly connected to a guide telescopic rod, one end of the guide telescopic rod away from the side plate is rotatably connected to the guide plate, a V-shaped plate is provided on the side of the guide plate away from the guide telescopic rod, and spring plates are symmetrically provided at the interval between the V-shaped plate and the guide plate, two groups of spring plates are symmetrically provided, and each group of spring plates is provided with a plurality of spring plates, two ends of the spring plates are respectively fixedly connected to the side of the V-shaped plate and the guide plate close to each other, a spring is provided on the outer sleeve of the guide telescopic rod, and the two ends of the spring are respectively fixedly connected to the side of the side of the guide plate and the guide plate close to each other, the guide telescopic rod is started, the two guide telescopic rods approach each other, and the guide plate, the spring plate and the V-shaped plate are driven to move. The two V-shaped plates are close to each other to fix the pipe. The V-shaped plate squeezes the pipe and deforms to adhere to the surface of the pipe, thereby achieving better fixation. The setting of the spring plate can deform when the V-shaped plate deforms, thereby providing support for the deformation of the V-shaped plate. When the guide plate moves, the spring is stretched and the spring rotates while stretching. The rotated V-shaped plate is parallel to the bottom plate. When the pipe is unloaded, the balance of the pipe after erection is broken under the elastic force of the spring to restore the rotational deformation, thereby ensuring that each pipe is tilted in a fixed direction. While fixing the pipe, stable unloading is ensured. Under the action of inertia, the pipe falls to the top of the bottom plate, and then the spring rotates to buffer the rotation and fall of the pipe to avoid collision of the pipe.

[0021] According to another aspect of the present invention, a method for welding a large-diameter TA31 pipe annular section is provided, comprising the following steps:

[0022] Step 1: Fix the pipe. Put the pipe into the fixed tube away from the bottom plate. Slide the pipe into another fixed tube along the fixed tube away from the bottom plate. Start the lifting and telescopic rod. The lifting and telescopic rod drives the connecting sleeve to move, drives the bracket, the plate body and the two fixed tubes to move, and the fixed tube and the pipe move relative to each other. Finally, the end of the pipe is located in the middle of the two fixed tubes. Start the fixed telescopic rod. The fixed telescopic rod drives the fixed block to move, drives the fixed ring plate to move, and the fixed ring plate contacts the pipe. Then the fixed ring plate deforms and covers the surface of the pipe, thereby completing the fixation. Then insert another pipe. Similarly, fix the second pipe. The ends of the two pipes are butt-jointed.

[0023] Step 2: Secondary fixation: Start the guide telescopic rods, and the two guide telescopic rods move closer to each other, driving the guide plate, the spring plate, and the V-shaped plate to move, and the two V-shaped plates move closer to each other, thereby fixing the pipe again;

[0024] Step 3: Shielding gas is introduced. Argon gas is connected through the connecting pipe. Argon gas passes through the connecting pipe and enters the outer shell, the fixed tube, and the tube body. The mechanism for placing the tube blocks the end of the fixed tube away from the bottom plate. Argon gas is introduced to serve as shielding gas during welding.

[0025] Step 4: Start welding, start the welding telescopic rod, the welding telescopic rod drives the welding plate to move, thereby driving the welder to approach the joint of the two pipes, start the motor, the output end of the motor drives the shaft to rotate, drives the gear to rotate, drives the gear ring to rotate, drives the outer ring tube to rotate, thereby driving the outer scraper to rotate, drives the connecting plate, welding telescopic rod, welding plate, and welder to rotate, thereby completing the welding of the annular section;

[0026] Step 5: Clean the inner wall. During welding, the outer scraper scrapes the inner side of the outer shell to scrape off the welding slag and fume adhering to the inner side of the outer shell, and finally scrapes the welding slag and fume into the inside of the tube body. The outer scraper rotates, driving the inner scraper to rotate, thereby scraping the outer side of the fixed tube to scrape off the fume and welding slag adhering to the surface of the fixed tube, and dropping them to the inner side of the outer shell, and then being swept into the inside of the tube body as the outer scraper rotates.

[0027] Step 6: Unloading of welding slag: Argon gas guides the fume and welding slag generated by welding, and the fume and welding slag fall to the side close to the bottom plate through the fixed tube and the tube body. The welding slag and smoke pass through the unloading hole and are finally discharged to the bottom of the bottom plate through the unloading tube, completing the unloading of welding waste;

[0028] Step 7: Pipe guiding. When the guide plate moves, the spring is stretched and rotated at the same time. The rotated V-shaped plate is parallel to the bottom plate. When the pipe is unloaded, the elastic force of the spring restores the rotational deformation, and the balance of the upright pipe is broken, so the pipe tilts in a fixed direction.

[0029] The present invention has the beneficial effects:

[0030] 1. The present invention provides a welding device and fills argon gas to avoid oxidation of materials caused by gas impurities such as oxygen and nitrogen during welding, so that the weld metal has high purity and few impurities, and the strength, toughness and corrosion resistance of the weld are improved. At the same time, the welding slag and fume generated by welding fall along the fixed tube under the synergistic effect of gravity and argon gas circulation. The argon gas guides the fume and slag generated by welding, and the fume and slag fall to the side close to the bottom plate through the fixed tube and the tube body.

[0031] 2. The present invention sets a welding assembly. During welding, an outer scraper scrapes the inner side surface of the outer shell to scrape off welding slag and fume adhered to the inner side surface of the outer shell, and finally scrapes the welding slag and fume into the interior of the tube body to avoid clogging of the outer shell. At the same time, the inner scraper rotates to scrape the outer side surface of the fixed tube to scrape off the fume and welding slag adhered to the surface of the fixed tube, which falls to the inner side surface of the outer shell and is swept into the interior of the tube body as the outer scraper rotates. During welding, the outer shell and the fixed tube are cleaned.

[0032] 3. The present invention sets a fixing component, the fixing ring plate contacts the pipe, and then the fixing ring plate is deformed to cover the surface of the pipe, thereby completing the fixation. The elastically set fixing ring plate can fix pipes of different sizes, and the hollow fixed ring plate can deform better, thereby achieving a better fixing effect.

[0033] 4. The present invention sets a guide component so that two V-shaped plates are close to each other, thereby fixing the pipe. The V-shaped plate squeezes the pipe and deforms, thereby adhering to the surface of the pipe, thereby achieving better fixation. The setting of the spring plate can deform when the V-shaped plate deforms, thereby providing support for the deformation of the V-shaped plate. When the guide plate moves, the spring is stretched, and the spring rotates while being stretched. The rotated V-shaped plate is parallel to the bottom plate. When the pipe is unloaded, the balance of the pipe after being erected is broken under the elastic force of the spring to restore the rotational deformation, thereby ensuring that each pipe is inclined in a fixed direction. While fixing the pipe, stable unloading is ensured. Under the action of inertia, the pipe falls to the top of the bottom plate, and then the spring rotates to buffer the rotation and fall of the pipe to avoid collision of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. Among them:

[0035] Figure 1 It is a schematic diagram of the large-diameter TA31 pipe annular cross-section welding equipment of the present invention;

[0036] Figure 2 It is a structural schematic diagram of the welding device of the present invention;

[0037] Figure 3 It is a schematic diagram of the cross-sectional structure of the fixed cylinder of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of the welding assembly of the present invention;

[0039] Figure 5 This is a schematic diagram of the structure of the outer scraper of the present invention;

[0040] Figure 6 It is a schematic diagram of the cross-sectional structure of the connecting plate of the present invention;

[0041] Figure 7 This is a schematic diagram of the structure of the drive assembly of the present invention;

[0042] Figure 8 It is a schematic diagram of the structure of the fixing assembly of the present invention;

[0043] Fig. 9 This is a schematic diagram of the structure of the blanking assembly of the present invention;

[0044] Fig.10 This is a schematic diagram of the structure of the guide assembly of the present invention;

[0045] Fig.11 This is a schematic diagram of the V-shaped plate structure of the present invention;

[0046] Fig.12 The invention discloses a welding method for the annular cross section of a large-diameter TA31 pipe.

[0047] The following are the descriptions of the reference numerals:

[0048] 1. Bottom plate; 2. Support legs; 3. Welding device; 31. Fixed cylinder; 32. Lifting assembly; 321. Lifting telescopic rod; 322. Connecting sleeve; 323. Bracket; 33. Welding mechanism; 331. Shell; 332. Connecting pipe; 333. Welding assembly; 3331. Outer scraper; 3332. Connecting plate; 3333. Telescopic sleeve; 3334. Welding plate; 3335. Welder; 3336. Welding telescopic rod; 3337. Inner scraper; 334. Driving assembly; 3341. Outer ring cylinder; 3342. Gear ring; 3343. Gear; 3 344, shield; 3345, column; 3346, shaft; 3347, motor; 3348, fixed sleeve; 335, guide assembly; 3351, side plate; 3352, guide telescopic rod; 3353, guide plate; 3354, V-shaped plate; 3355, spring plate; 3356, spring; 336, tube body; 337, fixed plate; 34, plate body; 35, unloading assembly; 351, unloading barrel; 352, connecting rod; 353, unloading hole; 36, fixed assembly; 361, fixed telescopic rod; 362, fixed block; 363, fixed ring plate. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0050] The diameter of the large-diameter TA31 pipe can be greater than or equal to 100 mm. For example, the diameter of the large-diameter TA31 pipe can be 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 400 mm, 500 mm, 600 mm, 700 mm or 800 mm, etc.

[0051] See also Figure 1-Figure 12 The present invention is a large-diameter TA31 pipe annular section welding device and a welding method.

[0052] Combination Figures 1 to 3 As shown, the large-diameter TA31 pipe annular section welding equipment includes:

[0053] A bottom plate 1, a support leg 2 is fixedly connected to the bottom of the bottom plate 1, and a welding device 3 is fixedly connected to a side of the bottom plate 1 away from the support leg 2;

[0054] Wherein, the welding device 3 comprises:

[0055] A fixing cylinder 31, wherein two fixing cylinders 31 are symmetrically arranged on the top of the bottom plate 1, and the insides of the two fixing cylinders 31 are fixedly connected with a fixing assembly 36;

[0056] A welding mechanism 33, the inner side surface of the welding mechanism 33 is fixedly connected to the outer side surface of the fixing cylinder 31;

[0057] A lifting assembly 32, the lifting assembly 32 is fixedly connected to a side of the bottom plate 1 away from the supporting leg 2, and the side of the lifting assembly 32 away from the bottom plate 1 is fixedly connected to the outer side of the fixing cylinder 31 away from the bottom plate 1, and the outer side of the fixing cylinder 31 close to the bottom plate 1 is fixedly connected to a plate body 34;

[0058] The material removal assembly 35 is fixedly connected to a side of the bottom plate 1 away from the plate body 34 .

[0059] Put the pipe into the fixed cylinder 31 away from the bottom plate 1, slide the pipe into the other fixed cylinder 31 along the fixed cylinder 31 away from the bottom plate 1, start the lifting assembly 32, and the lifting assembly 32 drives the upper fixed cylinder 31, the welding mechanism 33, the lower fixed cylinder 31, and the plate body 34 to rise in turn. The fixed cylinder 31 and the pipe move relative to each other, and finally the end of the pipe is located in the middle of the two fixed cylinders 31. Start the fixing assembly 36 inside the fixed cylinder 31 close to the bottom plate 1 to fix the pipe, and then insert another pipe, and start the fixing assembly 36 inside the fixed cylinder 31 away from the bottom plate 1. Part 36 is used to fix the second pipe. The ends of the two pipes are butt-jointed, and the welding mechanism 33 is started. At the same time, argon is filled into the welding mechanism 33 to serve as a protective gas. The output end of the welding mechanism 33 is rotated to perform rotational welding on the annular cross-section of the butt joint of the two pipes. The filling of argon can prevent the oxidation of the material caused by gas impurities such as oxygen and nitrogen during welding, so that the weld metal has high purity and less impurities, and the strength, toughness and corrosion resistance of the weld are improved. At the same time, the welding slag and fume generated by the welding fall along the fixing tube 31 under the synergistic effect of gravity and the circulation of argon.

[0060] like Figure 3As shown, the welding mechanism 33 includes a shell 331, and the shell 331 is provided with two ends. The ends of the two fixed cylinders 31 close to each other extend into the inside of the two shells 331 respectively, and the outer side surfaces of the fixed cylinders 31 are fixedly connected to the inner side surfaces of the shells 331. The side of the shell 331 away from the bottom plate 1 is fixedly connected with a connecting pipe 332, and a plurality of connecting pipes 332 are evenly distributed along the circumference of the shell 331. The interval between the shell 331 and the fixed cylinder 31 is slidably connected with a welding assembly 333, and the welding assembly 333 is connected along the shell 33 1, a plurality of guide components 335 are evenly distributed around the circumference of the housing 331, a driving component 334 is fixedly connected to the outer side of the housing 331, and the output end of the driving component 334 is fixedly connected to the side of the welding component 333 away from the fixed cylinder 31, the side of the driving component 334 close to the bottom plate 1 is fixedly connected to the side of the plate body 34 away from the bottom plate 1, the top of the bottom plate 1 is fixedly connected to the guide component 335, and the guide component 335 is arranged directly below the fixed cylinder 31, and the side of the housing 331 close to the bottom plate 1 is fixedly connected to the tube body 336, and the tube body 336 penetrates The plate body 34 and the tube body 336 are inclined toward the side close to the bottom plate 1. The side of the bottom plate 1 away from the support leg 2 is fixedly connected with a fixing plate 337. The outer side of the tube body 336 is fixedly connected to the inner side of the fixing plate 337. The argon gas is connected through the connecting pipe 332. The argon gas passes through the connecting pipe 332 and enters the outer shell 331, the fixing cylinder 31, and the tube body 336. The mechanism for placing the pipe blocks the end of the fixing cylinder 31 away from the bottom plate 1. The argon gas guides the fume and slag generated by welding. The fume and slag pass through the fixing cylinder 31 and The tube body 336 falls to the side close to the bottom plate 1, and the driving component 334 is started. The output end of the driving component 334 drives the welding component 333 to rotate, and the welding component 333 is started to weld the ends of the two tubes. The guide component 335 is started, and the guide component 335 fixes the tube. The lifting component 32 is started and the tube is released. As the lifting component 32 rises, the welded tube is separated from the fixing tube 31, and the guide component 335 rotates in one direction to complete the unloading of the tube, so that the tube is unloaded in a directional manner.

[0061] like Figure 4As shown, the welding assembly 333 includes an outer scraper 3331, the surface of the outer scraper 3331 is slidably connected to the inner side surfaces of the two outer shells 331, the side of the outer scraper 3331 away from the outer shell 331 is fixedly connected to a connecting plate 3332, the side of the connecting plate 3332 away from the outer scraper 3331 is slidably connected to the side of the two fixed cylinders 31 close to each other, and the side of the connecting plate 3332 away from the outer scraper 3331 is symmetrically provided with welding telescopic rods 3336, the surface of the welding telescopic rod 3336 is fixedly connected to the inner side surface of the connecting plate 3332, the side of the welding telescopic rod 3336 away from the connecting plate 3332 is fixedly connected to a welding plate 3334, and the output end of the welding telescopic rod 3336 is fixedly connected to the welding plate 3334, and the welding plate 333 A welder 3335 is fixedly connected to the side away from the welding telescopic rod 3336. When the welding telescopic rod 3336 is started, the welding telescopic rod 3336 drives the welding plate 3334 to move, thereby driving the welder 3335 to approach the joint of the two pipes, so as to weld pipes of different diameters. The driving assembly 334 drives the outer scraper 3331 to rotate, thereby driving the connecting plate 3332, the welding telescopic rod 3336, the welding plate 3334, and the welder 3335 to rotate, thereby completing the welding of the annular cross section. While welding, the outer scraper 3331 scrapes the inner side surface of the outer shell 331 to scrape off the welding slag and smoke adhering to the inner side surface of the outer shell 331, and finally scrapes the welding slag and smoke into the inside of the pipe body 336 to avoid clogging of the outer shell 331.

[0062] like Figure 5 and Figure 6 As shown, a telescopic sleeve 3333 is provided at the interval between the connecting plate 3332 and the welding plate 3334, and the two sides of the telescopic sleeve 3333 are respectively fixedly connected to the connecting plate 3332 and the side of the welding plate 3334 close to each other, the two ends of the outer scraper 3331 are fixedly connected to the inner scraper 3337, and the sides of the two inner scrapers 3337 close to each other are respectively fixedly connected to the surface of the connecting plate 3332, the surface of the connecting plate 3332 is slidably connected to the inner side surface of the fixed cylinder 31, and the welding plate 3334 moves, The telescopic sleeve 3333 is driven to extend and retract, so as to prevent welding slag and smoke from contacting the welding telescopic rod 3336 and preventing the welding telescopic rod 3336 from being damaged. The outer scraper 3331 rotates, driving the inner scraper 3337 to rotate, thereby scraping the outer side surface of the fixed cylinder 31, scraping off the smoke and welding slag attached to the surface of the fixed cylinder 31, and dropping them onto the inner side surface of the outer shell 331, and being swept into the inside of the tube body 336 as the outer scraper 3331 rotates, thereby completing the cleaning of the outer shell 331 and the fixed cylinder 31 during welding.

[0063] like Figure 7As shown, the driving assembly 334 includes an outer ring cylinder 3341, the inner side surface of the outer ring cylinder 3341 is slidably connected to the outer side surface of the outer shell 331, and the inner side surface of the outer ring cylinder 3341 is fixedly connected to the side of the outer scraper 3331 away from the connecting plate 3332, the outer side surface of the outer ring cylinder 3341 is fixedly connected to a gear ring 3342, the outer meshing connection of the gear ring 3342 is connected to a gear 3343, the side of the gear 3343 close to the plate body 34 is fixedly connected to a rotating shaft 3346, the end of the rotating shaft 3346 away from the gear 3343 is fixedly connected to a motor 3347, and the rotating shaft 3346 is fixedly connected to the output end of the motor 3347, the motor 3347 is started, and the output end of the motor 3347 drives the rotating shaft 3346 to rotate, drives the gear 3343 to rotate, drives the gear ring 3342 to rotate, drives the outer ring cylinder 3341 to rotate, thereby driving The movable outer scraper 3331 rotates, eventually driving the welder 3335 to rotate, the outer side surface of the outer ring cylinder 3341 is rotatably connected to the shield 3344, the end of the rotating shaft 3346 close to the motor 3347 passes through the shield 3344, and the inner side surface of the shield 3344 is rotatably connected to the surface of the rotating shaft 3346, the side of the shield 3344 close to the plate body 34 is fixedly connected to the column 3345, and two columns 3345 are symmetrically arranged at the interval between the plate body 34 and the shield 3344, the end of the column 3345 away from the shield 3344 is fixedly connected to the side of the plate body 34 away from the bottom plate 1, the surface of the motor 3347 is fixedly connected to the fixing sleeve 3348, the side of the fixing sleeve 3348 away from the motor 3347 is fixedly connected to the surface of the column 3345, and the shield 3344 protects the gear ring 3342 and the gear 3343.

[0064] like Figure 8 As shown, the fixing assembly 36 includes a fixed telescopic rod 361, which is fixedly connected to the inner side surface of the fixed cylinder 31, and a plurality of fixed telescopic rods 361 are evenly arranged along the circumference of the fixed cylinder 31, and one end of the fixed telescopic rod 361 away from the fixed cylinder 31 is fixedly connected to a fixed block 362, and the side of the fixed block 362 away from the fixed telescopic rod 361 is fixedly connected to a fixed ring plate 363, and the fixed ring plate 363 is made of elastic material, and the fixed ring plate 363 is hollow. When the fixed telescopic rod 361 is started, the fixed telescopic rod 361 drives the fixed block 362 to move, drives the fixed ring plate 363 to move, and the fixed ring plate 363 contacts the pipe, and then the fixed ring plate 363 is deformed to cover the surface of the pipe, thereby completing the fixation, the elastically arranged fixed ring plate 363 can fix pipes of different sizes, and the hollow fixed ring plate 363 can better deform, thereby achieving a better fixing effect.

[0065] like Fig. 9As shown, the lifting assembly 32 includes a lifting telescopic rod 321, which is symmetrically arranged on the side of the base plate 1 away from the supporting leg 2. A connecting sleeve 322 is arranged on the side of the two lifting telescopic rods 321 away from the base plate 1, and a bracket 323 is arranged at the interval between the two connecting sleeves 322. The bracket 323 is fixedly connected to the side of the plate body 34 away from the base plate 1, and the inner side surface of the connecting sleeve 322 is fixedly connected to the surface of the bracket 323, and the inner side surface of the bracket 323 is fixedly connected to the outer side surface of the fixed cylinder 31 away from the plate body 34. When the lifting telescopic rod 321 is started, the lifting telescopic rod 321 drives the connecting sleeve 322 to move, and drives the bracket 323, the plate body 34 and the two fixed cylinders 31 to move, thereby completing the adjustment of the welding position and unloading after welding is completed.

[0066] like Fig. 9 and Fig.10 As shown, the unloading assembly 35 includes a unloading barrel 351, which is fixedly connected to the side of the base plate 1 away from the plate body 34, and the unloading barrel 351 is arranged directly below the fixed barrel 31. The outer side surface of the unloading barrel 351 is fixedly connected with a connecting rod 352, and the side of the connecting rod 352 away from the unloading barrel 351 is fixedly connected to the supporting leg 2. A unloading hole 353 is opened on the surface of the base plate 1, and a plurality of unloading holes 353 are opened, and a plurality of unloading holes 353 are opened directly below the fixed barrel 31. The welding slag and smoke fall along the fixed barrel 31, and the welding slag and smoke pass through the unloading holes 353 and are finally discharged to the bottom of the base plate 1 through the unloading barrel 351, thereby completing the unloading of welding waste.

[0067] like Fig.11As shown, a side plate 3351 is provided at the interval between the plate body 34 and the bottom plate 1, and the two side plates 3351 are fixedly connected to the side of the bottom plate 1 close to the plate body 34, and the two side plates 3351 are fixedly connected to the guide telescopic rod 3352 on the side close to each other, and the end of the guide telescopic rod 3352 away from the side plate 3351 is rotatably connected to the guide plate 3353, and the side of the guide plate 3353 away from the guide telescopic rod 3352 is provided with a V-shaped plate 3354, and the space between the V-shaped plate 3354 and the guide plate 3353 is Spring plates 3355 are symmetrically arranged at the intervals, and there are two groups of spring plates 3355 symmetrically arranged, and each group of spring plates 3355 is provided with a plurality of spring plates 3355. The two ends of the spring plates 3355 are respectively fixedly connected to the V-shaped plate 3354 and the side of the guide plate 3353 close to each other. A spring 3356 is sleeved on the outside of the guide telescopic rod 3352, and the two ends of the spring 3356 are respectively fixedly connected to the side plate 3351 and the side of the guide plate 3353 close to each other. When the guide telescopic rod 3352 is started, the two guide telescopic rods 335 2 are close to each other, driving the guide plate 3353, the spring plate 3355, and the V-shaped plate 3354 to move. The two V-shaped plates 3354 are close to each other, thereby fixing the pipe. The V-shaped plate 3354 squeezes the pipe, and the V-shaped plate 3354 is deformed, thereby adhering to the surface of the pipe, thereby achieving better fixation. The setting of the spring plate 3355 can be deformed when the V-shaped plate 3354 is deformed, thereby providing support for the deformation of the V-shaped plate 3354. When the guide plate 3353 moves, the spring 33 56 is stretched, and the spring 3356 is stretched and rotated at the same time. The rotated V-shaped plate 3354 is parallel to the bottom plate 1. When the pipe is unloaded, the elastic force of the spring 3356 restores the rotational deformation, and the balance of the pipe after erection is broken, thereby ensuring that each pipe is inclined in a fixed direction. While fixing the pipe, stable unloading is ensured. Under the action of inertia, the pipe falls to the top of the bottom plate 1, and then the spring 3356 rotates to buffer the rotation and fall of the pipe and avoid collision of the pipe.

[0068] Combination Fig.12 As shown, a method for welding a large-diameter TA31 pipe annular section includes the following steps:

[0069] Step 1: Fix the pipe. Put the pipe from the fixed tube 31 far away from the bottom plate 1. The pipe slides into another fixed tube 31 along the fixed tube 31 far away from the bottom plate 1. Start the lifting telescopic rod 321. The lifting telescopic rod 321 drives the connecting sleeve 322 to move, drives the bracket 323, the plate body 34 and the two fixed tubes 31 to move, and the fixed tube 31 and the pipe move relative to each other. Finally, the end of the pipe is located in the middle of the two fixed tubes 31. Start the fixed telescopic rod 361. The fixed telescopic rod 361 drives the fixed block 362 to move, drives the fixed ring plate 363 to move, and the fixed ring plate 363 contacts the pipe. Then the fixed ring plate 363 is deformed to cover the surface of the pipe, thereby completing the fixation. Then insert another pipe. Similarly, fix the second pipe. The ends of the two pipes are connected.

[0070] Step 2: Secondary fixation: Start the guide telescopic rod 3352, and the two guide telescopic rods 3352 move closer to each other, driving the guide plate 3353, the spring plate 3355, and the V-shaped plate 3354 to move, and the two V-shaped plates 3354 move closer to each other, thereby fixing the pipe again;

[0071] Step 3: Shielding gas is introduced. Argon gas is connected through the connecting pipe 332. Argon gas passes through the connecting pipe 332 and enters the outer shell 331, the fixed tube 31, and the tube body 336. The mechanism for placing the pipe blocks the end of the fixed tube 31 away from the bottom plate 1. Argon gas is introduced to serve as shielding gas during welding.

[0072] Step 4, start welding, start the welding telescopic rod 3336, the welding telescopic rod 3336 drives the welding plate 3334 to move, thereby driving the welder 3335 close to the joint of the two pipes, start the motor 3347, the output end of the motor 3347 drives the rotating shaft 3346 to rotate, drives the gear 3343 to rotate, drives the gear ring 3342 to rotate, drives the outer ring cylinder 3341 to rotate, thereby drives the outer scraper 3331 to rotate, drives the connecting plate 3332, the welding telescopic rod 3336, the welding plate 3334, and the welder 3335 to rotate, thereby completing the welding of the annular cross section;

[0073] Step 5: Cleaning the inner wall. During welding, the outer scraper 3331 scrapes the inner side of the outer shell 331 to scrape off the welding slag and smoke adhering to the inner side of the outer shell 331, and finally scrapes the welding slag and smoke into the tube body 336. The outer scraper 3331 rotates, driving the inner scraper 3337 to rotate, thereby scraping the outer side of the fixed cylinder 31 to scrape off the smoke and welding slag adhering to the surface of the fixed cylinder 31, and dropping them to the inner side of the outer shell 331, and being swept into the tube body 336 as the outer scraper 3331 rotates.

[0074] Step 6: Unloading welding slag: Argon gas guides the fume and welding slag generated by welding, and the fume and welding slag fall to the side close to the bottom plate 1 through the fixed cylinder 31 and the tube body 336. The welding slag and smoke pass through the unloading hole 353 and are finally discharged to the bottom of the bottom plate 1 through the unloading cylinder 351, completing the unloading of welding waste;

[0075] Step seven, pipe guiding, when the guide plate 3353 moves, the spring 3356 is stretched, and the spring 3356 rotates while being stretched. The rotated V-shaped plate 3354 is parallel to the bottom plate 1. When the pipe is unloaded, the elastic force of the spring 3356 to restore the rotational deformation breaks the balance of the upright pipe, and the pipe tilts in a fixed direction.

[0076] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A large-diameter TA31 pipe annular section welding equipment, characterized in that: include: A base plate (1), wherein the bottom of the base plate (1) is fixedly connected to a support leg (2), and a welding device (3) is fixedly connected to a side of the base plate (1) away from the support leg (2); Wherein, the welding device (3) comprises: A fixed cylinder (31), wherein two fixed cylinders (31) are symmetrically arranged on the top of the bottom plate (1), and a fixing assembly (36) is fixedly connected inside the two fixed cylinders (31); A welding mechanism (33), wherein the inner side surface of the welding mechanism (33) is fixedly connected to the outer side surface of the fixing cylinder (31); A lifting assembly (32), the lifting assembly (32) being fixedly connected to a side of the base plate (1) away from the supporting leg (2), and the side of the lifting assembly (32) away from the base plate (1) is fixedly connected to an outer side surface of a fixing cylinder (31) away from the base plate (1), and a plate body (34) is fixedly connected to an outer side surface of the fixing cylinder (31) close to the base plate (1); A material discharge assembly (35), wherein the material discharge assembly (35) is fixedly connected to a side of the bottom plate (1) away from the plate body (34).

2. A large-diameter TA31 pipe annular section welding equipment according to claim 1, characterized in that: The welding mechanism (33) comprises a shell (331), wherein two shells (331) are provided, and the ends of the two fixed cylinders (31) close to each other extend into the inside of the two shells (331) respectively, and the outer side surfaces of the fixed cylinders (31) are fixedly connected to the inner side surfaces of the shells (331), and the side of the shell (331) away from the bottom plate (1) is fixedly connected to a connecting pipe (332), and a plurality of the connecting pipes (332) are evenly distributed along the circumference of the shell (331), and a welding assembly (333) is slidably connected at the interval between the shell (331) and the fixed cylinder (31), and a plurality of the welding assemblies (333) are evenly distributed along the circumference of the shell (331), and a driving assembly (334) is fixedly connected to the outer side surface of the shell (331), and the driving assembly The output end of the (334) is fixedly connected to a side of the welding assembly (333) away from the fixed cylinder (31); the side of the driving assembly (334) close to the bottom plate (1) is fixedly connected to a side of the plate body (34) away from the bottom plate (1); the top of the bottom plate (1) is fixedly connected to a guide assembly (335), and the guide assembly (335) is arranged directly below the fixed cylinder (31); the side of the housing (331) close to the bottom plate (1) is fixedly connected to a tube body (336), the tube body (336) penetrates the plate body (34), and the tube body (336) is inclined toward the side close to the bottom plate (1); the side of the bottom plate (1) away from the supporting leg (2) is fixedly connected to a fixing plate (337), and the outer side surface of the tube body (336) is fixedly connected to the inner side surface of the fixing plate (337).

3. A large-diameter TA31 pipe annular section welding equipment according to claim 2, characterized in that The welding assembly (333) comprises an outer scraper (3331), the surface of the outer scraper (3331) is slidably connected to the inner side surfaces of the two outer shells (331), the side of the outer scraper (3331) away from the outer shell (331) is fixedly connected to a connecting plate (3332), the side of the connecting plate (3332) away from the outer scraper (3331) is slidably connected to the sides of the two fixed cylinders (31) close to each other, and the side of the connecting plate (3332) away from the outer scraper (3331) is opposite to the inner side surfaces of the two fixed cylinders (31). A welding telescopic rod (3336) is provided, the surface of the welding telescopic rod (3336) is fixedly connected to the inner side surface of the connecting plate (3332), the side of the welding telescopic rod (3336) away from the connecting plate (3332) is fixedly connected to a welding plate (3334), and the output end of the welding telescopic rod (3336) is fixedly connected to the welding plate (3334), and the side of the welding plate (3334) away from the welding telescopic rod (3336) is fixedly connected to a welder (3335).

4. A large-diameter TA31 pipe annular section welding equipment according to claim 3, characterized in that A telescopic sleeve (3333) is provided at the interval between the connecting plate (3332) and the welding plate (3334), and the two sides of the telescopic sleeve (3333) are respectively fixedly connected to the connecting plate (3332) and the side of the welding plate (3334) close to each other, and the two ends of the outer scraper (3331) are fixedly connected to the inner scraper (3337), and the sides of the two inner scrapers (3337) close to each other are respectively fixedly connected to the surface of the connecting plate (3332), and the surface of the connecting plate (3332) is slidably connected to the inner side surface of the fixed cylinder (31).

5. A large-diameter TA31 pipe annular section welding equipment according to claim 4, characterized in that: The driving assembly (334) includes an outer ring tube (3341), the inner side surface of the outer ring tube (3341) is slidably connected to the outer side surface of the outer shell (331), and the inner side surface of the outer ring tube (3341) is fixedly connected to the side of the outer scraper (3331) away from the connecting plate (3332), the outer side surface of the outer ring tube (3341) is fixedly connected to a gear ring (3342), the outer part of the gear ring (3342) is meshingly connected to a gear (3343), the side of the gear (3343) close to the plate body (34) is fixedly connected to a rotating shaft (3346), the end of the rotating shaft (3346) away from the gear (3343) is fixedly connected to a motor (3347), and the rotating shaft (3346) is fixedly connected to the output end of the motor (3347), and the outer side surface of the outer ring tube (3341) rotates A shield (3344) is connected, one end of the rotating shaft (3346) close to the motor (3347) passes through the shield (3344), and the inner side surface of the shield (3344) is rotatably connected to the surface of the rotating shaft (3346), a side of the shield (3344) close to the plate body (34) is fixedly connected to a column (3345), and two columns (3345) are symmetrically arranged at the interval between the plate body (34) and the shield (3344), one end of the column (3345) away from the shield (3344) is fixedly connected to a side of the plate body (34) away from the bottom plate (1), and a fixing sleeve (3348) is fixedly connected to the surface of the motor (3347), and a side of the fixing sleeve (3348) away from the motor (3347) is fixedly connected to the surface of the column (3345).

6. A large-diameter TA31 pipe annular section welding equipment according to claim 5, characterized in that: The fixing assembly (36) comprises a fixed telescopic rod (361), the fixed telescopic rod (361) being fixedly connected to the inner side surface of the fixing tube (31), and a plurality of the fixed telescopic rods (361) are evenly arranged along the circumference of the fixing tube (31), one end of the fixed telescopic rod (361) away from the fixing tube (31) is fixedly connected to a fixed block (362), and one side of the fixed block (362) away from the fixed telescopic rod (361) is fixedly connected to a fixed ring plate (363), and the fixed ring plate (363) is made of elastic material, and the fixed ring plate (363) is hollow.

7. A large-diameter TA31 pipe annular section welding equipment according to claim 6, characterized in that: The lifting assembly (32) comprises lifting telescopic rods (321), the lifting telescopic rods (321) are symmetrically arranged on a side of the base plate (1) away from the supporting leg (2), two lifting telescopic rods (321) are each provided with a connecting sleeve (322) on a side away from the base plate (1), a bracket (323) is provided at a distance between the two connecting sleeves (322), the bracket (323) is fixedly connected to a side of the plate body (34) away from the base plate (1), and the inner side surface of the connecting sleeve (322) is fixedly connected to a surface of the bracket (323), and the inner side surface of the bracket (323) is fixedly connected to an outer side surface of the fixing tube (31) away from the plate body (34).

8. The large-diameter TA31 pipe annular section welding equipment according to claim 7 is characterized in that: The material discharge assembly (35) comprises a material discharge barrel (351), wherein the material discharge barrel (351) is fixedly connected to a side of the bottom plate (1) away from the plate body (34), and the material discharge barrel (351) is arranged directly below the fixed barrel (31), and a connecting rod (352) is fixedly connected to the outer side surface of the material discharge barrel (351), and a side of the connecting rod (352) away from the material discharge barrel (351) is fixedly connected to the supporting leg (2), and a material discharge hole (353) is provided on the surface of the bottom plate (1), and a plurality of the material discharge holes (353) are provided, and a plurality of the material discharge holes (353) are provided directly below the fixed barrel (31).

9. A large-diameter TA31 pipe annular section welding equipment according to claim 8, characterized in that: A side plate (3351) is provided at the interval between the plate body (34) and the bottom plate (1); the two side plates (3351) are fixedly connected to a side of the bottom plate (1) close to the plate body (34); the two sides of the side plates (3351) close to each other are fixedly connected to a guide telescopic rod (3352); one end of the guide telescopic rod (3352) away from the side plate (3351) is rotatably connected to a guide plate (3353); a V-shaped plate (3354) is provided on the side of the guide plate (3353) away from the guide telescopic rod (3352); and the V-shaped plate (3354) is fixedly connected to the bottom plate (1) on the side of the bottom plate (1) close to the plate body (34). Spring plates (3355) are symmetrically arranged at the interval between the V-shaped plate (3354) and the guide plate (3353), and two groups of the spring plates (3355) are symmetrically arranged, and each group of the spring plates (3355) is provided with a plurality of spring plates (3355), and the two ends of the spring plates (3355) are respectively fixedly connected to the sides of the V-shaped plate (3354) and the guide plate (3353) that are close to each other, and the outer sleeve of the guide telescopic rod (3352) is provided with a spring (3356), and the two ends of the spring (3356) are respectively fixedly connected to the sides of the side plate (3351) and the guide plate (3353) that are close to each other.

10. A method for welding a large-diameter TA31 pipe annular section, characterized in that: The large-diameter TA31 pipe annular section welding equipment according to claim 9 comprises the following steps: Step 1: Fix the pipe. Put the pipe into the fixed tube (31) away from the bottom plate (1). Slide the pipe into the other fixed tube (31) along the fixed tube (31) away from the bottom plate (1). Start the lifting telescopic rod (321). The lifting telescopic rod (321) drives the connecting sleeve (322) to move, drives the bracket (323), the plate body (34) and the two fixed tubes (31) to move, and the fixed tube (31) and the pipe move relative to each other. Finally, the end of the pipe is located in the middle of the two fixed tubes (31). Start the fixed telescopic rod (361). The fixed telescopic rod (361) drives the fixed block (362) to move, drives the fixed ring plate (363) to move, and the fixed ring plate (363) contacts the pipe. Then, the fixed ring plate (363) is deformed to cover the surface of the pipe, thereby completing the fixation. Then, insert another pipe. Similarly, fix the second pipe. The ends of the two pipes are connected. Step 2: Secondary fixation: Start the guide telescopic rod (3352), the two guide telescopic rods (3352) approach each other, drive the guide plate (3353), the spring plate (3355), and the V-shaped plate (3354) to move, and the two V-shaped plates (3354) approach each other, thereby fixing the pipe again; Step 3: Shielding gas is introduced. Argon gas is connected through the connecting pipe (332). Argon gas passes through the connecting pipe (332) and enters the outer shell (331), the fixed tube (31), and the tube body (336). The mechanism for placing the tube blocks the end of the fixed tube (31) away from the bottom plate (1). Argon gas is introduced to serve as shielding gas during welding. Step 4: Start welding, start the welding telescopic rod (3336), the welding telescopic rod (3336) drives the welding plate (3334) to move, thereby driving the welder (3335) close to the joint of the two pipes, start the motor (3347), the output end of the motor (3347) drives the rotating shaft (3346) to rotate, drives the gear (3343) to rotate, drives the gear ring (3342) to rotate, drives the outer ring cylinder (3341) to rotate, thereby driving the outer scraper (3331) to rotate, drives the connecting plate (3332), the welding telescopic rod (3336), the welding plate (3334), and the welder (3335) to rotate, thereby completing the welding of the annular cross section; Step 5: cleaning the inner wall. During welding, the outer scraper (3331) scrapes the inner side surface of the outer shell (331) to scrape off the welding slag and smoke adhering to the inner side surface of the outer shell (331), and finally scrapes the welding slag and smoke into the inside of the tube body (336). The outer scraper (3331) rotates, driving the inner scraper (3337) to rotate, thereby scraping the outer side surface of the fixed tube (31), scraping off the smoke and welding slag adhering to the surface of the fixed tube (31), and dropping them onto the inner side surface of the outer shell (331), and then being swept into the inside of the tube body (336) as the outer scraper (3331) rotates. Step 6: Unloading of welding slag: Argon gas guides the fume and welding slag generated by welding, and the fume and welding slag fall to the side close to the bottom plate (1) through the fixed tube (31) and the tube body (336); the welding slag and smoke pass through the unloading hole (353) and are finally discharged to the bottom of the bottom plate (1) through the unloading tube (351), thereby completing the unloading of welding waste; Step 7, pipe guiding. When the guide plate (3353) moves, the spring (3356) is stretched, and the spring (3356) rotates while being stretched. After the rotation, the V-shaped plate (3354) is parallel to the bottom plate (1). When the pipe is unloaded, the elastic force of the spring (3356) to restore the rotational deformation breaks the balance of the pipe after it is erected, and the pipe tilts in a fixed direction.

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