A high-pressure pipe welding device and a welding method thereof

Abstract

The application relates to the technical field of laser welding, and discloses a high-pressure pipeline welding device and a welding method thereof, which solve the problem that when the number of branch pipelines needing to be welded increases or the position changes, the clamping device needs to be added or the position of the clamping device needs to be adjusted correspondingly, and the application range is small, and the device comprises a base, a movable seat is arranged above the base, the base is provided with a clamping support for fixing a main pipeline, two mounting racks are fixedly arranged on the movable seat, a translation mechanism for driving the two mounting racks to move is arranged on the base, a positioning structure for fixing a branch pipeline is arranged on the top of the mounting rack, mounting shells are fixedly connected to the sides close to each other of the two mounting racks, and mounting seats are arranged below the mounting shells; the positions of the positioning structure and the laser welding assembly can be flexibly adjusted according to the number and position of the branch pipelines, the application range is improved, and the pipeline is conveniently welded.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of laser welding, and particularly relates to a high-pressure pipeline welding device and a welding method thereof. BACKGROUND

[0002] In order to meet the gas power requirements of commercial liquid medium-sized carrier rockets in the processes of component assembly, general assembly transfer and vertical test, different kinds of gas media with various pressures and flow rates are provided. The general assembly and test area gas power system specifically includes a high-pressure air supply system, a high-pressure nitrogen gas supply system, a high-pressure helium gas supply system and a process equipment control system to meet the above technical requirements.

[0003] The high-pressure air supply system obtains a high-pressure air source through a compressor boosting mode. The high-pressure air supply system mainly comprises an air compressor unit, a high-pressure air storage tank, a gas distribution table (box), valves and a pipeline system, etc. The compressor is placed in the power center, and the high-pressure air storage tank is placed in the tank area. The compressor unit sucks in air (atmosphere) and compresses it to the required pressure, and then fills the high-pressure air storage tank after filtration and drying. Then, the high-pressure air storage tank is delivered to the general assembly transfer area, the vertical test area, the second-stage component manufacturing and turnover plant through the gas distribution table (box) and the pipeline. The high-pressure air supply system is mainly used to provide 40MPa-45MPa, 26MPa-35MPa compressed air to the general assembly transfer area, 37MPa-45MPa, 26MPa-35MPa and 6MPa-9MPa compressed air to the vertical test area, 23MPa, 0.1MPa-1MPa compressed air to the welding area of the second-stage component manufacturing and turnover plant, 0.6MPa-0.8MPa compressed air to the surface treatment area of the second-stage component manufacturing and turnover plant, 23MPa compressed air to the material turnover area of the second-stage component manufacturing and turnover plant, and 1MPa compressed air to the second-stage garage.

[0004] In the above construction, welding technology plays an important role. For high-pressure gas pipeline construction, the welding quality is very important. Currently, several sub-pipelines need to be welded to the to-be-welded positions on the main pipeline during production of the pipeline.

[0005] However, it is worth considering that the sub-pipeline and the to-be-welded position on the main pipeline need to be aligned manually during welding, and then the sub-pipeline and the main pipeline are clamped and fixed by clamping devices. According to the number of sub-pipelines, clamping devices equal to the number of sub-pipelines need to be arranged. When the number of sub-pipelines to be welded increases or the position of the sub-pipeline to be welded changes, the clamping devices need to be added or the positions of the clamping devices need to be adjusted accordingly. The application range is small, and there is a certain limitation.

[0006] Therefore, in order to solve the above problems, a more user-friendly related facility is needed. SUMMARY

[0007] In view of the above, in order to overcome the defects of the prior art, the present application provides a high-pressure pipeline welding device and a welding method thereof, which effectively solves the problem that when the number of sub-pipes that need to be welded increases or the position changes, the clamping device needs to be added or the position of the clamping device needs to be adjusted accordingly, and the scope of application is small.

[0008] To achieve the above object, the present application provides the following technical scheme: a high-pressure pipeline welding device, comprising a base, an active seat is arranged above the base, a clamping support for fixing a main pipeline is installed on the base, two mounting brackets are fixedly installed on the active seat, a translation mechanism for driving the two mounting brackets to move is installed on the base, a positioning structure for fixing a sub-pipe is installed on the top of the mounting bracket, an installation shell is fixedly connected to the side of the two mounting brackets close to each other, an installation seat is arranged below the installation shell, a laser welding assembly is installed on the installation seat, and a welding adjustment structure for driving the installation seat to rotate around the sub-pipe is installed on the installation shell.

[0009] Preferably, the welding adjustment structure comprises an adjustment seat arranged in the installation shell, and the installation shell is a hollow structure with an open bottom end, a first rotating shaft is rotatably connected through the adjustment seat, a first gear is fixedly connected to the bottom end of the first rotating shaft, a first rack is fixedly connected to the inner wall of the installation shell and engaged with the first gear, a second rack is fixedly connected to the top of the adjustment seat and engaged with the first gear, a first guide bar is fixedly connected to the top of the second rack, a first guide groove is formed in the bottom of the adjustment seat, and the first guide bar penetrates the first guide groove, first avoiding holes are formed at both ends of the installation shell and matched with the second rack and the first guide bar, a guide piece matched with the adjustment seat is installed on the installation shell, and a poking mechanism for poking the first rotating shaft to move is installed on the active seat.

[0010] Preferably, the guide piece comprises a fixed bar fixedly installed on the inner wall of the top of the installation shell, a second guide groove is formed in the bottom of the fixed bar, a second guide bar is fixedly connected to the top of the adjustment seat, and the second guide bar is located in the second guide groove.

[0011] Preferably, the dial mechanism comprises a movable plate arranged on the top of the mounting shell, a third avoiding hole adapted to the first rotating shaft is arranged on the inner wall of the top of the mounting shell, and the first rotating shaft penetrates through the third avoiding hole, a rectangular hole is arranged on the movable plate, and the top end of the first rotating shaft is located in the rectangular hole, the first lead screw and the first guide column penetrate through the movable plate, the threads on the two first lead screws are opposite, the movable plate and the first lead screw are connected in a threaded manner, the first guide column is fixedly connected with the movable seat, the first lead screw is rotationally connected with the movable seat, the movable seat is provided with a damping driver for driving the first lead screw to rotate, and the top of the mounting shell is fixedly connected with two stop blocks, and the two stop blocks are located on the two sides of the movable plate.

[0012] Preferably, the damping driver comprises a first damping disc fixedly installed on the end of the first lead screw, a first support shaft is arranged on the side of the first damping disc away from the movable seat, a first fixing frame is rotationally arranged on the outer part of the first support shaft, the first fixing frame is fixedly connected with the movable seat, a second damping disc and a second gear are fixedly connected with the two ends of the first support shaft respectively, the second damping disc is in contact with the first damping disc, and the movable seat is installed with a driving piece adapted to the second gear.

[0013] Preferably, the driving piece comprises two first protection boxes arranged on the side of the movable seat away from the mounting frame, a sealing sleeve is arranged on the outer part of the first protection box, the sealing sleeve is fixedly connected with the movable seat, the two first protection boxes are fixedly connected through a connecting plate, at least one first hydraulic telescopic rod is fixedly installed on the movable seat, the telescopic end of the first hydraulic telescopic rod is fixedly connected with the connecting plate, a first support part is fixedly connected in the first protection box, a first connecting shaft penetratingly rotationally connected with the first support part is arranged on the first support part, the first connecting shaft is fixedly installed with a third gear engaged with the second gear, one of the first protection boxes is fixedly installed with a first motor, a second rotating shaft is fixedly connected with the output end of the first motor, the second rotating shaft is rotationally connected with the two first protection boxes respectively, two first bevel gears are fixedly arranged on the outer part of the second rotating shaft, the first connecting shaft is fixedly installed with a second bevel gear engaged with the first bevel gear.

[0014] Preferably, the positioning structure comprises a second protective box fixedly installed on the mounting frame, the second protective box is located above the mounting shell, two second support shafts are arranged in the second protective box, the distal ends of the two second support shafts are rotatably connected with the inner wall of the second protective box respectively, the proximal ends of the two second support shafts are fixedly connected with the mounting plate respectively, a second avoiding hole matched with the mounting plate is arranged on the second protective box, the mounting plate penetrates through the second avoiding hole, two positioning plates are symmetrically arranged on the two sides of the second protective box, the two mounting plates are fixedly connected with the two positioning plates respectively, a second support part is fixedly connected in the second protective box, a second connecting shaft rotatably penetrates through the second support part, a worm wheel and a third bevel gear are fixedly connected with the two ends of the second connecting shaft respectively, fourth bevel gears are fixedly sleeved on the outer portions of the second support shafts, the two fourth bevel gears are meshed with the third bevel gear, a third rotating shaft is rotatably connected with the second protective box, a worm is fixedly installed in the second protective box and meshed with the worm wheel, the third rotating shaft is rotatably connected with the movable seat, a third damping disc is fixedly installed in the first protective box, a third support shaft is arranged in the first protective box, a second fixing frame is rotatably sleeved on the outer portion of the third support shaft, the second fixing frame is fixedly connected with the movable seat, a fourth damping disc and a fourth gear are fixedly connected with the two ends of the third support shaft respectively, the fourth damping disc is in contact with the third damping disc, a damping block is fixedly installed on the second fixing frame and in contact with the third damping disc, and the fourth gear is meshed with the third gear.

[0015] Preferably, the laser welding assembly comprises a laser welder arranged below the mounting seat, the top of the laser welder is fixedly connected with a connecting block, the bottom of the mounting seat is provided with a third guide groove, a guide block is arranged in the third guide groove, the two sides of the connecting block are symmetrically provided with side plates, the side plates are fixedly connected with the guide blocks, the two sides of the two side plates are in contact with the two sides of the connecting block respectively, the two sides of the connecting block are fixedly connected with fourth rotating shafts respectively, the fourth rotating shafts penetrate through the side plates, the distal ends of the fourth rotating shafts are fixedly connected with fifth damping discs, the side of the fifth damping disc away from the fourth rotating shaft is in contact with a damping plate, two second guide columns penetrate through the damping plate, one end of the second guide column is fixedly connected with the mounting seat, the other end of the second guide column is fixedly connected with a fixing disc, a compression spring is sleeved on the outer portion of the second guide column, and the two ends of the compression spring are in abutment with the damping plate and the fixing disc respectively.

[0016] Preferably, the clamping support comprises a plurality of brackets fixedly installed on the top of the base, the top of the base is provided with two groups of clamps, each group of clamps comprises two clamping plates, the sides away from each other of adjacent two clamping plates are respectively provided with first support plates, the first support plates are fixedly connected with the base, the sides of the first support plates facing the clamping plates are fixedly connected with second hydraulic telescopic rods, and the telescopic ends of the second hydraulic telescopic rods are fixedly connected with the clamping plates, the translation mechanism comprises two second support plates fixedly installed on the top of the base, one of the second support plates is fixedly installed with a second motor, the other second support plate is penetrated with a rotatingly connected second lead screw, and the output end of the second motor is fixedly connected with the second lead screw, the top of the base is provided with a third guide column, and the two ends of the third guide column are fixedly connected with the base through third support plates, and the second lead screw and the third guide column penetrate through two mounting brackets in a threaded connection mode.

[0017] The application further provides a high-pressure pipeline welding method using the high-pressure pipeline welding device.

[0018] Step one: the main pipeline is clamped and fixed by the clamping support, and the opening of the to-be-welded part on the main pipeline faces upward, and the mounting bracket and the movable seat are driven to move to a preset position by the translation mechanism;

[0019] Step two: the staff places the branch pipeline to be welded above the main pipeline, fixes the branch pipeline by the positioning structure on the mounting bracket, and drives the two mounting seats to rotate by ninety degrees by the two welding adjustment structures, so as to correct the welding starting position of the mounting seat and the laser welding assembly;

[0020] Step three: the two welding adjustment structures drive the two mounting seats to rotate by one hundred and eighty degrees in reverse, and the laser welding assembly welds the connection part of the branch pipeline and the main pipeline, after the welding is completed, the two welding adjustment structures drive the two mounting seats to rotate by ninety degrees in positive direction, so that the mounting seat and the laser welding assembly are reset to the initial position relative to the mounting shell;

[0021] Step four: the positioning structure releases the fixation of the branch pipeline, the mounting bracket and the movable seat are driven to move to the next preset position by the translation mechanism, and step two is returned to be executed until all the branch pipelines are welded, the clamping and fixation of the main pipeline are released by the clamping support, and the staff can take down the welded pipeline.

[0022] Compared with the prior art, the application has the following beneficial effects:

[0023] The split pipe is fixed through the positioning structure on the mounting frame, the two welding adjustment structures respectively drive the two mounting seats to rotate by 90 degrees, the welding starting positions of the mounting seat and the laser welding assembly are corrected, then the two welding adjustment structures respectively drive the two mounting seats to rotate by 180 degrees, and the laser welding assembly welds the connection between the split pipe and the main pipe, after the welding is completed, the two welding adjustment structures respectively drive the two mounting seats to rotate by 90 degrees, so that the mounting seat and the laser welding assembly are reset to the initial position relative to the mounting shell, and the split pipe is fixed through the positioning structure, the mounting frame and the movable seat are driven to move to the next preset position through the translation mechanism, that is, the welding of the next split pipe can be started, when all the split pipes are welded, the clamping and fixing of the main pipe are released through the clamping support, and the worker can take down the welded pipe, the positions of the positioning structure and the laser welding assembly can be flexibly adjusted according to the number and positions of the split pipes, the application range is improved, and the pipe is conveniently welded. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of the application, and constitute a part of the specification, illustrate the application, and are used to explain the application, and do not constitute a limitation on the application.

[0025] In the drawings:

[0026] Figure 1 It is a structural schematic diagram of the whole application;

[0027] Figure 2 It is a structural schematic diagram of the movable seat and the mounting frame of the application;

[0028] Figure 3 It is a structural schematic diagram of the inside of the first protective box of the application;

[0029] Figure 4 It is a structural schematic diagram of the second fixing frame of the application;

[0030] Figure 5 It is a structural schematic diagram of the inside of the second protective box of the application;

[0031] Figure 6 It is a structural schematic diagram of the mounting shell of the application;

[0032] Figure 7 It is a structural schematic diagram of the fixed strip and the second guide strip of the application;

[0033] Figure 8 It is a structural schematic diagram of the adjustment seat of the application;

[0034] Figure 9 It is a structural schematic diagram of the laser welding assembly of the application.

[0035] In the figure: 1, base; 2, movable seat; 3, mounting frame; 4, laser welder; 5, mounting seat; 6, mounting shell; 7, adjusting seat; 8, first rotating shaft; 9, first gear; 10, first rack; 11, first supporting shaft; 12, second rack; 13, first guide bar; 14, first guide groove; 15, fixed bar; 16, second guide groove; 17, second guide bar; 18, first avoiding hole; 19, movable plate; 20, rectangular hole; 21, first screw rod; 22, first guide column; 23, stop block; 24, first damping disc; 25, first fixed frame; 26, second damping disc; 27, first protective box; 28, connecting plate; 29, first hydraulic telescopic rod; 30, second gear; 31, first connecting shaft; 32, third gear; 33, first supporting part; 34, second rotating shaft; 35, first bevel gear; 36, second bevel gear; 37, first motor; 38, sealing sleeve; 39, second protective box; 40, second supporting shaft; 41, mounting plate; 42, positioning plate; 43, second avoiding hole; 44, second connecting shaft; 45, second supporting part; 46, third bevel gear; 47, fourth bevel gear; 48, worm wheel; 49, third rotating shaft; 50, worm; 51, third damping disc; 52, third supporting shaft; 53, second fixed frame; 54, damping block; 55, fourth damping disc; 56, fourth gear; 57, connecting block; 58, third guide groove; 59, guide block; 60, side plate; 61, fourth rotating shaft; 62, fifth damping disc; 63, damping plate; 64, second guide column; 65, fixed disc; 66, compression spring; 67, bracket; 68, second hydraulic telescopic rod; 69, clamping plate; 70, second motor; 71, second screw rod; 72, third guide column; 73, third avoiding hole; 74, first supporting plate; 75, second supporting plate; 76, third supporting plate. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] Embodiment one, by Figure 1 , Figure 2 and Figure 6The present application comprises a base 1, an upper portion of the base 1 is provided with a movable seat 2, the base 1 is provided with clamping supports for fixing a main pipe, the movable seat 2 is fixedly provided with two mounting racks 3, the base 1 is provided with a translation mechanism for driving the two mounting racks 3 to move, the top of the mounting rack 3 is provided with a positioning structure for fixing a branch pipe, the side of the two mounting racks 3 close to each other is fixedly connected with a mounting shell 6, the lower portion of the mounting shell 6 is provided with a mounting seat 5, the mounting seat 5 is provided with a laser welding assembly, and the mounting shell 6 is provided with a welding adjustment structure for driving the mounting seat 5 to rotate around the branch pipe; the positioning structure on the mounting rack 3 is used for fixing the branch pipe, the two welding adjustment structures are respectively used for driving the two mounting seats 5 to rotate by 90 degrees, the welding starting position of the mounting seat 5 and the laser welding assembly is corrected, then the two welding adjustment structures are respectively used for driving the two mounting seats 5 to rotate by 180 degrees, and the laser welding assembly is used for welding the connection between the branch pipe and the main pipe, after the welding is completed, the two welding adjustment structures are respectively used for driving the two mounting seats 5 to rotate by 90 degrees, so that the mounting seat 5 and the laser welding assembly are reset to the initial position relative to the mounting shell 6, and the positioning structure is used for releasing the fixation of the branch pipe, the mounting rack 3 and the movable seat 2 are driven by the translation mechanism to move to the next preset position, and then the next branch pipe can be welded, when all the branch pipes are welded, the clamping supports are used for releasing the clamping and fixation of the main pipe, and the staff can take down the welded pipe, the positions of the positioning structure and the laser welding assembly can be flexibly adjusted according to the number and positions of the branch pipes, the application range is improved, and the pipe welding is facilitated.

[0038] In the second embodiment, on the basis of the first embodiment, Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 8The welding adjusting structure comprises an adjusting seat 7 arranged in the mounting shell 6, the mounting shell 6 is a cavity structure with an open bottom end, a first rotating shaft 8 is rotatably arranged through the adjusting seat 7, the bottom end of the first rotating shaft 8 is fixedly connected with a first gear 9, the inner wall of the mounting shell 6 is fixedly connected with a first rack 10 engaged with the first gear 9, the top of the mounting seat 5 is fixedly connected with a second rack 12 engaged with the first gear 9, the top of the second rack 12 is fixedly connected with a first guide strip 13, the bottom of the adjusting seat 7 is provided with a first guide groove 14, and the first guide strip 13 penetrates through the first guide groove 14, the two ends of the mounting shell 6 are respectively provided with first avoiding holes 18 matched with the second rack 12 and the first guide strip 13, the mounting shell 6 is provided with a guide matched with the adjusting seat 7, the movable seat 2 is provided with a pushing mechanism for pushing the first rotating shaft 8 to move, the guide comprises a fixed strip 15 fixedly arranged on the top inner wall of the mounting shell 6, the bottom of the fixed strip 15 is provided with a second guide groove 16, the top of the adjusting seat 7 is fixedly connected with a second guide strip 17, and the second guide strip 17 is located in the second guide groove 16, the pushing mechanism comprises a movable plate 19 arranged on the top of the mounting shell 6, the top inner wall of the mounting shell 6 is provided with a third avoiding hole 73 matched with the first rotating shaft 8, and the first rotating shaft 8 penetrates through the third avoiding hole 73, the movable plate 19 is provided with a rectangular hole 20, and the top end of the first rotating shaft 8 is located in the rectangular hole 20, the movable plate 19 is provided with a first lead screw 21 and a first guide column 22, the threads of the two first lead screws 21 are opposite, the movable plate 19 and the first lead screw 21 are connected in a threaded manner, the first guide column 22 is fixedly connected with the movable seat 2, the first lead screw 21 is rotatably connected with the movable seat 2, the movable seat 2 is provided with a damping driver for driving the first lead screw 21 to rotate, the top of the mounting shell 6 is fixedly connected with two stop blocks 23, the two stop blocks 23 are located on the two sides of the movable plate 19 respectively, the damping driver comprises a first damping disc 24 fixedly arranged on the end of the first lead screw 21, the side, away from the movable seat 2, of the first damping disc 24 is provided with a first supporting shaft 11, the outer part of the first supporting shaft 11 is rotatably sleeved with a first fixed frame 25, the first fixed frame 25 is fixedly connected with the movable seat 2, the two ends of the first supporting shaft 11 are respectively fixedly connected with a second damping disc 26 and a second gear 30, the second damping disc 26 is in contact with the first damping disc 24, the movable seat 2 is provided with a driving part matched with the second gear 30, the driving part comprises two first protection boxes 27 arranged on the side, away from the mounting frame 3, of the movable seat 2, the outer part of the first protection box 27 is sleeved with a sealing sleeve 38, the sealing sleeve 38 is fixedly connected with the movable seat 2, the two first protection boxes 27 are fixedly connected through a connecting plate 28, the movable seat 2 is fixedly provided with at least one first hydraulic telescopic rod 29, the telescopic end of the first hydraulic telescopic rod 29 is fixedly connected with the connecting plate 28, the first protection box 27 is fixedly connected with a first supporting part 33, the first supporting part 33 is rotatably provided with a first connecting shaft 31,The first connecting shaft 31 is fixedly installed with a third gear 32 engaged with the second gear 30, one of the first protective boxes 27 is fixedly installed with a first motor 37, the output end of the first motor 37 is fixedly connected with a second rotating shaft 34, the second rotating shaft 34 is rotatably connected with the two first protective boxes 27 respectively, the outer portion of the second rotating shaft 34 is fixedly sleeved with two first bevel gears 35, the first connecting shaft 31 is fixedly installed with a second bevel gear 36 engaged with the first bevel gear 35,

[0039] The second rotating shaft 34 is driven to rotate by the first motor 37, the second rotating shaft 34 drives the second bevel gear 36, the first connecting shaft 31 and the third gear 32 to rotate through the first bevel gear 35, the third gear 32 drives the first supporting shaft 11 and the second damping disc 26 to rotate through the second gear 30, the second damping disc 26 can drive the first damping disc 24 and the first lead screw 21 to rotate through friction, the first lead screw 21 drives the movable plate 19 to move horizontally relative to the first guide column 22 and the movable seat 2, since the threads on the two first lead screws 21 are opposite in direction, the two movable plates 19 move in opposite directions, so that the two movable plates 19 respectively push the two first rotating shafts 8 to rotate in the same direction around the branch pipes, and the first rotating shaft 8 slides in the rectangular hole 20, the first rotating shaft 8 drives the second guide strip 17 to slide in the second guide groove 16 through the adjusting seat 7, the first rotating shaft 8 drives the second rack 12 to move synchronously through the first gear 9, and the first gear 9 rolls on the first rack 10, the first gear 9 rotates, while the first gear 9 drives the second rack 12 to slide relative to the adjusting seat 7 due to the rotation of the first gear 9, the first guide strip 13 slides in the first guide groove 14, and the second rack 12 can drive the mounting seat 5 and the laser welding assembly to rotate, when the two mounting seats 5 are turned by ninety degrees, the laser welding assembly and the mounting seat 5 move out from below the mounting shell 6, and the movable plate 19 is in contact with one of the stop blocks 23, with the continuous rotation of the second damping disc 26, the second damping disc 26 cannot drive the first damping disc 24 to rotate synchronously through friction, the mounting seat 5 and the laser welding assembly automatically stop after moving to the welding starting position, when the second rotating shaft 34 is driven to rotate reversely by the first motor 37, the second damping disc 26 can drive the first damping disc 24 to rotate reversely through friction, when the two mounting seats 5 are reversed by one hundred and eighty degrees, the movable plate 19 is in contact with the other stop block 23, ensuring that the mounting seat 5 automatically stops after moving to the preset position, and during the process of reversing the mounting seat 5 by one hundred and eighty degrees, the laser welding assembly welds the connection between the branch pipe and the main pipe, the connecting plate 28 and the first protective box 27 are driven to move relative to the sealing sleeve 38 and the movable seat 2 through the first hydraulic telescopic rod 29, so that the first supporting part 33 drives the third gear 32 to slide relative to the second gear 30 through the first connecting shaft 31, and the sliding of the third gear 32 relative to the second gear 30 does not affect the engagement relationship between the third gear 32 and the second gear 30.

[0040] Example three, on the basis of example two, by Figure 2 、 Figure 3 、 Figure 4 and Figure 5 It is given that the positioning structure comprises a second protective box 39 fixedly installed on the mounting frame 3, and the second protective box 39 is located above the mounting shell 6, two second support shafts 40 are arranged in the second protective box 39, the ends of the two second support shafts 40 away from each other are rotatably connected with the inner walls of the second protective box 39 respectively, the ends of the two second support shafts 40 close to each other are fixedly connected with mounting plates 41 respectively, the second protective box 39 is provided with second avoiding holes 43 matched with the mounting plates 41, the mounting plates 41 penetrate through the second avoiding holes 43, the two sides of the second protective box 39 are symmetrically provided with positioning plates 42, and the two mounting plates 41 are fixedly connected with the two positioning plates 42 respectively, the second protective box 39 is fixedly connected with a second support part 45, the second support part 45 is penetrated by a rotatably connected second connecting shaft 44, the two ends of the second connecting shaft 44 are fixedly connected with a worm wheel 48 and a third bevel gear 46 respectively, the outer part of the second support shaft 40 is fixedly sleeved with a fourth bevel gear 47, the two fourth bevel gears 47 are engaged with the third bevel gear 46, the second protective box 39 is rotatably connected with a third rotating shaft 49, the third rotating shaft 49 is fixedly installed with a worm 50 located in the second protective box 39, and the worm 50 and the worm wheel 48 are engaged, the third rotating shaft 49 is rotatably connected with the movable seat 2, the third rotating shaft 49 is fixedly installed with a third damping disc 51 located in the first protective box 27, the first protective box 27 is provided with a third support shaft 52, the outer part of the third support shaft 52 is rotatably sleeved with a second fixing frame 53, the second fixing frame 53 is fixedly connected with the movable seat 2, the two ends of the third support shaft 52 are fixedly connected with a fourth damping disc 55 and a fourth gear 56 respectively, the fourth damping disc 55 is in contact with the third damping disc 51, the second fixing frame 53 is fixedly installed with a damping block 54, and the damping block 54 is in contact with the third damping disc 51, the fourth gear 56 is engaged with the third gear 32;

[0041] The first hydraulic telescopic rod 29 drives the connecting plate 28 and the first protective box 27 to move, and the first protective box 27 drives the first connecting shaft 31 and the third gear 32 to move synchronously through the first supporting part 33, so that the third gear 32 is engaged with the second gear 30 and the fourth gear 56 at the same time. When the branch pipe to be welded is placed above the main pipe and is aligned with the position to be welded on the main pipe, the two second protective boxes 39 are located on the two sides of the branch pipe respectively. When the two mounting seats 5 are turned by ninety degrees, the mounting seat 5 and the laser welding assembly move to the welding starting position, the third gear 32 drives the fourth gear 56 to rotate synchronously, the fourth gear 56 drives the fourth damping disc 55 to rotate through the third supporting shaft 52, the fourth damping disc 55 drives the third damping disc 51 to rotate through the friction force, the third damping disc 51 drives the worm 50 to rotate through the third rotating shaft 49, the worm 50 drives the second connecting shaft 44 and the third bevel gear 46 to rotate through the worm wheel 48, the third bevel gear 46 drives the two second supporting shafts 40 to rotate in opposite directions through the two fourth bevel gears 47 respectively, and the two second supporting shafts 40 can drive the two positioning plates 42 to move towards the branch pipe through the mounting plate 41. When the four positioning plates 42 clamp the branch pipe, with the continuous rotation of the fourth damping disc 55, the fourth damping disc 55 cannot drive the third damping disc 51 to rotate synchronously through the friction force. When the mounting seat 5 and the laser welding assembly move to the welding starting position, the first hydraulic telescopic rod 29 drives the connecting plate 28 and the first protective box 27 to move, the first protective box 27 drives the first connecting shaft 31 and the third gear 32 to move through the first supporting part 33, and the third gear 32 slides relative to the second gear 30 and the fourth gear 56. When the third gear 32 is no longer engaged with the fourth gear 56, the first hydraulic telescopic rod 29 stops driving the connecting plate 28 and the first protective box 27 to move. When the second rotating shaft 34 is driven by the first motor 37 to rotate in the opposite direction, the third gear 32 cannot drive the third supporting shaft 52 to rotate through the fourth gear 56, and the damping block 54 and the third damping disc 51 are in contact. The position of the third damping disc 51 is limited by the damping block 54, so that the third damping disc 51 and the third rotating shaft 49 are prevented from rotating and shaking due to non-human factors, and it is ensured that the four positioning plates 42 remain in the state of clamping the branch pipe during welding. When the two mounting seats 5 are reversed by one hundred and eighty degrees, the movable plate 19 is in contact with the other stop block 23, the mounting seat 5 automatically stops after moving to the preset position, and when the laser welding assembly completes the welding of the connection between the branch pipe and the main pipe, the first hydraulic telescopic rod 29 drives the connecting plate 28 and the first protective box 27 to move, so that the third gear 32 is engaged with the fourth gear 56 again. At this time, the first motor 37 continuously drives the second rotating shaft 34 to continuously rotate, the third gear 32 drives the fourth gear 56 to rotate, so that the fourth damping disc 55 drives the third damping disc 51 to rotate in the opposite direction through the friction force, and the third damping disc 51 slides relative to the damping block 54. Thus, the positioning plates 42 are no longer clamped to the branch pipe.When the positioning plate 42 moves to the initial position relative to the second protective box 39, the first hydraulic telescopic rod 29 drives the connecting plate 28 to move again, so that the third gear 32 is no longer engaged with the fourth gear 56, and the first motor 37 can drive the second rotating shaft 34 to rotate again, so that the mounting seat 5 and the laser welding assembly move to the lower side of the mounting shell 6 again, and the mounting seat 5 and the laser welding assembly are reset to the initial position relative to the mounting shell 6.

[0042] In the fourth embodiment, based on the first embodiment, Figure 1 、 Figure 7 and Figure 9 are given, the laser welding assembly comprises a laser welder 4 arranged below the mounting seat 5, the top of the laser welder 4 is fixedly connected with a connecting block 57, the bottom of the mounting seat 5 is provided with a third guide groove 58, the third guide groove 58 is provided with a guide block 59, the two sides of the connecting block 57 are symmetrically provided with side plates 60, the side plates 60 and the guide block 59 are fixedly connected, and the sides of the two side plates 60 close to each other are respectively in contact with the two sides of the connecting block 57, the two sides of the connecting block 57 are respectively fixedly connected with fourth rotating shafts 61, the fourth rotating shafts 61 penetrate through the side plates 60, one end of the fourth rotating shaft 61 away from the connecting block 57 is fixedly connected with a fifth damping disc 62, the side of the fifth damping disc 62 away from the fourth rotating shaft 61 is in contact with a damping plate 63, two second guide columns 64 penetrate through the damping plate 63, one end of the second guide column 64 is fixedly connected with the mounting seat 5, the other end of the second guide column 64 is fixedly connected with a fixed disc 65, a compression spring 66 is arranged outside the second guide column 64, and the two ends of the compression spring 66 are respectively in contact with the damping plate 63 and the fixed disc 65, the clamping support comprises a plurality of brackets 67 fixedly installed on the top of the base 1, the top of the base 1 is provided with two groups of clamping devices, each group of clamping devices comprises two clamping plates 69, the sides of the two adjacent clamping plates 69 away from each other are respectively provided with first support plates 74, the first support plates 74 and the base 1 are fixedly connected, the side of the first support plate 74 facing the clamping plate 69 is fixedly connected with a second hydraulic telescopic rod 68, and the telescopic end of the second hydraulic telescopic rod 68 is fixedly connected with the clamping plate 69, the translation mechanism comprises two second support plates 75 fixedly installed on the top of the base 1, one of the second support plates 75 is fixedly installed with a second motor 70, the other second support plate 75 penetrates through a second screw rod 71 rotatably connected, and the output end of the second motor 70 is fixedly connected with the second screw rod 71, the top of the base 1 is provided with a third guide column 72, and the two ends of the third guide column 72 are fixedly connected with the base 1 through third support plates 76, the second screw rod 71 and the third guide column 72 penetrate through the two mounting frames 3 respectively, and the connection mode between the second screw rod 71 and the mounting frame 3 is screw connection.

[0043] The worker drives the two adjacent damping plates 63 to move away from each other, so that the damping plates 63 no longer press the fifth damping disc 62, the compression spring 66 is in a compressed state, the position of the laser welding device 4 is released, the worker drives the laser welding device 4 to move, and the laser welding device 4 drives the guide block 59 to slide in the third guide groove 58 through the connecting block 57, the fourth rotating shaft 61 and the side plate 60, so that the distance between the laser welding device 4 and the position to be welded can be adjusted. The worker drives the laser welding device 4 to rotate, so that the connecting block 57 drives the fourth rotating shaft 61 to rotate relative to the side plate 60, so that the inclination angle of the laser welding device 4 can be changed. When the position of the laser welding device 4 is adjusted, the worker releases the damping plates 63, the compression spring 66 drives the damping plates 63 to move relative to the second guide column 64 and the mounting seat 5, the damping plates 63 press the fifth damping disc 62, so that the fifth damping disc 62 is fixed relative to the damping plates 63 and the mounting seat 5, so that the laser welding device 4 is fixed relative to the mounting seat 5. The worker places the main pipe to be welded on the plurality of brackets 67, the main pipe is supported by the brackets 67, the clamping plates 69 are driven to move by the second hydraulic telescopic rod 68, the adjacent two clamping plates 69 clamp the main pipe, so that the main pipe is fixed relative to the base 1. The second screw rod 71 is driven to rotate by the second motor 70, so that the mounting frame 3 and the movable seat 2 move horizontally, and the other mounting frame 3 slides relative to the third guide column 72 and the third supporting plate 76. Through the design of the third guide column 72 and the third supporting plate 76, the movable seat 2 and the two mounting frames 3 move stably relative to the base 1.

[0044] The high-pressure pipeline welding method of the embodiment uses the high-pressure pipeline welding device as described above, and includes the following steps:

[0045] Step one: The main pipe is clamped and fixed by the clamping support, and the opening of the position to be welded on the main pipe faces upward. The mounting frame 3 and the movable seat 2 are driven to move to a preset position by the translation mechanism.

[0046] Step two: The worker places the branch pipe to be welded above the main pipe, fixes the branch pipe by the positioning structure on the mounting frame 3, and drives the two mounting seats 5 to rotate ninety degrees in the positive direction respectively, so as to correct the welding starting position of the mounting seat 5 and the laser welding assembly.

[0047] Step three: The two mounting seats 5 are driven to rotate one hundred and eighty degrees in the reverse direction respectively, and the laser welding assembly welds the connection between the branch pipe and the main pipe. After the welding is completed, the two mounting seats 5 are driven to rotate ninety degrees in the positive direction respectively, so that the mounting seat 5 and the laser welding assembly are reset to the initial position relative to the mounting shell 6.

[0048] Step four: release the fixing of the branch pipe through the positioning structure, drive the mounting frame 3 and the movable seat 2 to move to the next preset position through the translation mechanism, return to execute step two until all the branch pipes are welded, release the clamping and fixing of the main pipe through the clamping support, and the worker can take down the welded pipe.

[0049] Working principle: when working, the main pipe is clamped and fixed through the clamping support, and the opening of the to-be-welded part on the main pipe faces upward, the mounting frame 3 and the movable seat 2 are driven to move to the preset position through the translation mechanism, the worker places the branch pipe to be welded above the main pipe, and the branch pipe is aligned with the to-be-welded part on the main pipe, the branch pipe is fixed through the positioning structure on the mounting frame 3, the two welding adjustment structures respectively drive the two mounting seats 5 to rotate ninety degrees, the welding starting position of the mounting seat 5 and the laser welding assembly is corrected, then the two welding adjustment structures respectively drive the two mounting seats 5 to reverse one hundred and eighty degrees, and the laser welding assembly welds the connection between the branch pipe and the main pipe, after welding, the two welding adjustment structures respectively drive the two mounting seats 5 to rotate ninety degrees, so that the mounting seat 5 and the laser welding assembly are reset to the initial position relative to the mounting shell 6, and the fixing of the branch pipe is released through the positioning structure, the mounting frame 3 and the movable seat 2 are driven to move to the next preset position through the translation mechanism, and the welding of the next branch pipe can be started, when all the branch pipes are welded, the clamping and fixing of the main pipe are released through the clamping support, and the worker can take down the welded pipe, the position of the positioning structure and the laser welding assembly can be flexibly adjusted according to the number and position of the branch pipe, the application range is improved, and the pipe is convenient to weld;

[0050] The first motor 37 drives the second rotating shaft 34 to rotate, and the second rotating shaft 34 drives the second bevel gear 36, the first connecting shaft 31 and the third gear 32 to rotate through the first bevel gear 35, the third gear 32 drives the first supporting shaft 11 and the second damping disc 26 to rotate through the second gear 30, the second damping disc 26 drives the first damping disc 24 and the first lead screw 21 to rotate through friction, the first lead screw 21 drives the movable plate 19 to move horizontally relative to the first guide column 22 and the movable seat 2, and since the threads on the two first lead screws 21 are opposite, the two movable plates 19 move in opposite directions, so that the two movable plates 19 respectively push the two first rotating shafts 8 to rotate in the same direction around the branch pipes, and the first rotating shaft 8 slides in the rectangular hole 20, the first rotating shaft 8 drives the second guide strip 17 to slide in the second guide groove 16 through the adjusting seat 7, the first rotating shaft 8 drives the second rack 12 to move synchronously through the first gear 9, and the first gear 9 rolls on the first rack 10, the first gear 9 rotates, and when the first gear 9 drives the second rack 12 to move synchronously, the first gear 9 drives the second rack 12 to slide relative to the adjusting seat 7 due to the rotation of the first gear 9, the first guide strip 13 slides in the first guide groove 14, and the second rack 12 drives the mounting seat 5 and the laser welding assembly to rotate, when the two mounting seats 5 are turned by ninety degrees, the laser welding assembly and the mounting seat 5 move out from below the mounting shell 6, and the movable plate 19 is in contact with one of the stop blocks 23, and when the second damping disc 26 continues to rotate, the second damping disc 26 cannot drive the first damping disc 24 to rotate synchronously through friction, the mounting seat 5 and the laser welding assembly automatically stop after moving to the welding starting position, when the first motor 37 drives the second rotating shaft 34 to rotate in the opposite direction, the second damping disc 26 can drive the first damping disc 24 to rotate in the opposite direction through friction, when the two mounting seats 5 are reversed by one hundred and eighty degrees, the movable plate 19 is in contact with the other stop block 23, ensuring that the mounting seat 5 automatically stops after moving to the preset position, and during the process of the mounting seat 5 being reversed by one hundred and eighty degrees, the laser welding assembly welds the connection between the branch pipe and the main pipe, the first supporting part 33 drives the third gear 32 to slide relative to the second gear 30 through the first connecting shaft 31, and the sliding of the third gear 32 relative to the second gear 30 does not affect the meshing relationship between the third gear 32 and the second gear 30;

[0051] The first hydraulic telescopic rod 29 drives the connecting plate 28 and the first protective box 27 to move, and the first protective box 27 drives the first connecting shaft 31 and the third gear 32 to move synchronously through the first supporting part 33, so that the third gear 32 is engaged with the second gear 30 and the fourth gear 56 at the same time. When the branch pipe to be welded is placed above the main pipe and is aligned with the position to be welded on the main pipe, the two second protective boxes 39 are located on the two sides of the branch pipe respectively. When the two mounting seats 5 are turned by ninety degrees, the mounting seat 5 and the laser welding assembly move to the welding starting position, the third gear 32 drives the fourth gear 56 to rotate synchronously, the fourth gear 56 drives the fourth damping disc 55 to rotate through the third supporting shaft 52, the fourth damping disc 55 drives the third damping disc 51 to rotate through the friction force, the third damping disc 51 drives the worm 50 to rotate through the third rotating shaft 49, the worm 50 drives the second connecting shaft 44 and the third bevel gear 46 to rotate through the worm wheel 48, the third bevel gear 46 drives the two second supporting shafts 40 to rotate in opposite directions through the two fourth bevel gears 47 respectively, and the two second supporting shafts 40 can drive the two positioning plates 42 to move towards the branch pipe through the mounting plate 41. When the four positioning plates 42 clamp the branch pipe, with the continuous rotation of the fourth damping disc 55, the fourth damping disc 55 cannot drive the third damping disc 51 to rotate synchronously through the friction force. When the mounting seat 5 and the laser welding assembly move to the welding starting position, the first hydraulic telescopic rod 29 drives the connecting plate 28 and the first protective box 27 to move, the first protective box 27 drives the first connecting shaft 31 and the third gear 32 to move through the first supporting part 33, and the third gear 32 slides relative to the second gear 30 and the fourth gear 56. When the third gear 32 is no longer engaged with the fourth gear 56, the first hydraulic telescopic rod 29 stops driving the connecting plate 28 and the first protective box 27 to move. When the second rotating shaft 34 is driven by the first motor 37 to rotate in the opposite direction, the third gear 32 cannot drive the third supporting shaft 52 to rotate through the fourth gear 56, and the damping block 54 and the third damping disc 51 are in contact. The position of the third damping disc 51 is limited by the damping block 54, so that the third damping disc 51 and the third rotating shaft 49 are prevented from rotating and shaking due to non-human factors, and it is ensured that the four positioning plates 42 remain in the state of clamping the branch pipe during welding. When the two mounting seats 5 are reversed by one hundred and eighty degrees, the movable plate 19 is in contact with the other stop block 23, the mounting seat 5 automatically stops after moving to the preset position, and when the laser welding assembly completes the welding of the connection between the branch pipe and the main pipe, the first hydraulic telescopic rod 29 drives the connecting plate 28 and the first protective box 27 to move, so that the third gear 32 is engaged with the fourth gear 56 again. At this time, the first motor 37 continuously drives the second rotating shaft 34 to continuously rotate, the third gear 32 drives the fourth gear 56 to rotate, so that the fourth damping disc 55 drives the third damping disc 51 to rotate in the opposite direction through the friction force, and the third damping disc 51 slides relative to the damping block 54. Thus, the positioning plates 42 are no longer clamped to the branch pipe.When the positioning plate 42 moves to the initial position relative to the second protective box 39, the first hydraulic telescopic rod 29 drives the connecting plate 28 to move again, so that the third gear 32 is no longer engaged with the fourth gear 56, and the first motor 37 can drive the second rotating shaft 34 to rotate, so that the mounting seat 5 and the laser welding assembly move to the lower side of the mounting shell 6 again, and the mounting seat 5 and the laser welding assembly are reset to the initial position relative to the mounting shell 6.

[0052] The staff drives the adjacent two damping plates 63 to move away, so that the damping plates 63 no longer press the fifth damping disc 62, and the compression spring 66 is in a compressed state, thereby releasing the limitation on the position of the laser welder 4. The staff drives the laser welder 4 to move, and the laser welder 4 drives the guide block 59 to slide in the third guide groove 58 through the connecting block 57, the fourth rotating shaft 61 and the side plate 60, so as to adjust the distance between the laser welder 4 and the place to be welded. The staff drives the laser welder 4 to rotate, so that the connecting block 57 drives the fourth rotating shaft 61 to rotate relative to the side plate 60, so as to change the inclination angle of the laser welder 4. When the position of the laser welder 4 is adjusted, the staff releases the damping plates 63, and the compression spring 66 drives the damping plates 63 to move relative to the second guide column 64 and the mounting seat 5, so that the fifth damping disc 62 is pressed by the damping plates 63 and fixed relative to the damping plates 63 and the mounting seat 5, so as to fix the laser welder 4 relative to the mounting seat 5. The staff places the main pipeline to be welded on the plurality of brackets 67, supports the main pipeline through the brackets 67, drives the clamping plates 69 to move through the second hydraulic telescopic rod 68, and the adjacent two clamping plates 69 clamp the main pipeline, so as to fix the main pipeline relative to the base 1. The second screw rod 71 is driven to rotate through the second motor 70, so as to drive the mounting frame 3 and the movable seat 2 to move horizontally, and the other mounting frame 3 slides relative to the third guide column 72 and the third supporting plate 76, so that the movable seat 2 and the two mounting frames 3 move stably relative to the base 1 through the design of the third guide column 72 and the third supporting plate 76.

[0053] It should be noted that, in the present document, the terms such as first and second, etc. are used merely to differentiate one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such a process, method, article or equipment.

[0054] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A high pressure pipe welding device comprising a base (1), characterized in that: The upper side of the base (1) is provided with a movable seat (2), the base (1) is provided with clamping supports for fixing main pipes, the movable seat (2) is fixedly provided with two mounting racks (3), the base (1) is provided with a translation mechanism for driving the two mounting racks (3) to move, the top of the mounting rack (3) is provided with a positioning structure for fixing branch pipes, the side close to each other of the two mounting racks (3) is fixedly connected with a mounting shell (6), the lower side of the mounting shell (6) is provided with a mounting seat (5), the mounting seat (5) is provided with a laser welding assembly, and the mounting shell (6) is provided with a welding adjusting structure for driving the mounting seat (5) to rotate around the branch pipe; the welding adjusting structure comprises an adjusting seat (7) arranged in the mounting shell (6), and the mounting shell (6) is a cavity structure with an open bottom, a first rotating shaft (8) is rotatably arranged on the adjusting seat (7), the bottom of the first rotating shaft (8) is fixedly connected with a first gear (9), the inner wall of the mounting shell (6) is fixedly connected with a first rack (10) engaged with the first gear (9), the top of the mounting seat (5) is fixedly connected with a second rack (12) engaged with the first gear (9), the top of the second rack (12) is fixedly connected with a first guide strip (13), the bottom of the adjusting seat (7) is provided with a first guide groove (14), and the first guide strip (13) penetrates through the first guide groove (14), the two ends of the mounting shell (6) are respectively provided with first avoiding holes (18) matched with the second rack (12) and the first guide strip (13), the mounting shell (6) is provided with a guide matched with the adjusting seat (7), and the movable seat (2) is provided with a poking mechanism for driving the first rotating shaft (8) to move. The toggle mechanism comprises a movable plate (19) arranged on the top of the mounting shell (6), a third avoiding hole (73) compatible with the first rotating shaft (8) is arranged on the inner wall of the top of the mounting shell (6), the first rotating shaft (8) penetrates through the third avoiding hole (73), a rectangular hole (20) is arranged on the movable plate (19), the top end of the first rotating shaft (8) is located in the rectangular hole (20), a first screw rod (21) and a first guide column (22) penetrate through the movable plate (19), the threads on the two first screw rods (21) are opposite, the movable plate (19) and the first screw rod (21) are connected in a threaded mode, the first guide column (22) is fixedly connected with the movable seat (2), the first screw rod (21) is rotationally connected with the movable seat (2), the movable seat (2) is provided with a damping driver for driving the first screw rod (21) to rotate, the top of the mounting shell (6) is fixedly connected with two stop blocks (23), and the two stop blocks (23) are located on the two sides of the movable plate (19), respectively.

2. A high pressure pipe welding apparatus according to claim 1, characterized by: The damping driver comprises a first damping disc (24) fixedly installed on the end of the first screw rod (21), a first supporting shaft (11) is arranged on the side of the first damping disc (24) away from the movable seat (2), a first fixing frame (25) is rotationally arranged on the outer portion of the first supporting shaft (11), the first fixing frame (25) is fixedly connected with the movable seat (2), a second damping disc (26) and a second gear (30) are fixedly connected with the two ends of the first supporting shaft (11), respectively, the second damping disc (26) is in contact with the first damping disc (24), and the movable seat (2) is provided with a driving member compatible with the second gear (30). The guide member comprises a fixed strip (15) fixedly installed on the top inner wall of the mounting shell (6), a second guide groove (16) is arranged on the bottom of the fixed strip (15), and the top of the adjusting seat (7) is fixedly connected with a second guide strip (17), and the second guide strip (17) is located in the second guide groove (16).

3. A high pressure pipe welding apparatus according to claim 2, wherein: The driving member comprises two first protective boxes (27) arranged on the side of the movable seat (2) away from the mounting frame (3), the outer part of the first protective box (27) is sleeved with a sealing sleeve (38), the sealing sleeve (38) is fixedly connected with the movable seat (2), the two first protective boxes (27) are fixedly connected through a connecting plate (28), the movable seat (2) is fixedly installed with at least one first hydraulic telescopic rod (29), the telescopic end of the first hydraulic telescopic rod (29) is fixedly connected with the connecting plate (28), the first protective box (27) is fixedly connected with a first supporting part (33) inside, the first supporting part (33) is penetrated with a first connecting shaft (31) which is rotatably connected, the first connecting shaft (31) is fixedly installed with a third gear (32) which is engaged with a second gear (30), one of the first protective boxes (27) is fixedly installed with a first motor (37), the output end of the first motor (37) is fixedly connected with a second rotating shaft (34), the second rotating shaft (34) is rotatably connected with the two first protective boxes (27) respectively, the outer part of the second rotating shaft (34) is fixedly sleeved with two first bevel gears (35), the first connecting shaft (31) is fixedly installed with a second bevel gear (36) which is engaged with the first bevel gear (35).

4. A high pressure pipe welding apparatus according to claim 3, wherein: The positioning structure comprises a second protective box (39) fixedly installed on the mounting frame (3), and the second protective box (39) is located above the mounting shell (6), two second supporting shafts (40) are arranged in the second protective box (39), and the second supporting shafts (40) are rotatably connected to the inner wall of the second protective box (39) at the distal ends thereof away from each other, and the proximal ends of the second supporting shafts (40) are fixedly connected with mounting plates (41), respectively, the second protective box (39) is provided with second avoiding holes (43) matched with the mounting plates (41), the mounting plates (41) penetrate through the second avoiding holes (43), and the second protective box (39) is provided with positioning plates (42) symmetrically arranged at the two sides thereof, and the mounting plates (41) are fixedly connected with the positioning plates (42), respectively, the second protective box (39) is fixedly connected with a second supporting part (45), the second supporting part (45) is provided with a second connecting shaft (44) rotatably penetrating therethrough, the two ends of the second connecting shaft (44) are fixedly connected with a worm wheel (48) and a third bevel gear (46), respectively, the second supporting shaft (40) is fixedly provided with fourth bevel gears (47) outside, the fourth bevel gears (47) are engaged with the third bevel gear (46), the second protective box (39) is rotatably connected with a third rotating shaft (49), the third rotating shaft (49) is fixedly provided with a worm (50) located in the second protective box (39), and the worm (50) and the worm wheel (48) are engaged, the third rotating shaft (49) is rotatably connected with the movable seat (2), the third rotating shaft (49) is fixedly provided with a third damping disc (51) located in the first protective box (27), the first protective box (27) is provided with a third supporting shaft (52), the third supporting shaft (52) is rotatably provided with a second fixing frame (53) outside, the second fixing frame (53) is fixedly connected with the movable seat (2), the third supporting shaft (52) is fixedly connected with a fourth damping disc (55) and a fourth gear (56) at the two ends thereof, respectively, the fourth damping disc (55) is in contact with the third damping disc (51), the second fixing frame (53) is fixedly provided with a damping block (54), and the damping block (54) is in contact with the third damping disc (51), and the fourth gear (56) is engaged with the third gear (32).

5. A high pressure pipe welding apparatus according to claim 1, wherein: The laser welding assembly includes a laser welder (4) arranged below a mounting seat (5), the top of the laser welder (4) is fixedly connected with a connecting block (57), the bottom of the mounting seat (5) is provided with a third guide groove (58), the third guide groove (58) is provided with a guide block (59), the two sides of the connecting block (57) are symmetrically provided with side plates (60), the side plates (60) and the guide block (59) are fixedly connected, and the two side plates (60) are respectively in contact with the two sides of the connecting block (57), the two sides of the connecting block (57) are respectively fixedly connected with fourth rotating shafts (61), the fourth rotating shafts (61) penetrate through the side plates (60), one end of the fourth rotating shaft (61) away from the connecting block (57) is fixedly connected with a fifth damping disc (62), one side of the fifth damping disc (62) away from the fourth rotating shaft (61) is in contact with a damping plate (63), two second guide columns (64) penetrate through the damping plate (63), one end of the second guide column (64) is fixedly connected with the mounting seat (5), the other end of the second guide column (64) is fixedly connected with a fixed disc (65), and the outside of the second guide column (64) is sleeved with a compression spring (66), the two ends of the compression spring (66) are respectively in abutment with the damping plate (63) and the fixed disc (65).

6. A high pressure pipe welding apparatus according to claim 1, wherein: The clamping support includes a plurality of brackets (67) fixedly installed on the top of the base (1), the top of the base (1) is provided with two groups of clamps, each group of clamps includes two clamping plates (69), the two clamping plates (69) are respectively provided with first support plates (74) away from each other, the first support plates (74) and the base (1) are fixedly connected, the first support plates (74) are fixedly connected with second hydraulic telescopic rods (68) on the side facing the clamping plates (69), and the telescopic ends of the second hydraulic telescopic rods (68) are fixedly connected with the clamping plates (69), the translation mechanism includes two second support plates (75) fixedly installed on the top of the base (1), one of the second support plates (75) is fixedly installed with a second motor (70), the other second support plate (75) penetrates through a rotatingly connected second lead screw (71), and the output end of the second motor (70) is fixedly connected with the second lead screw (71), the top of the base (1) is provided with a third guide column (72), and the two ends of the third guide column (72) are fixedly connected with the base (1) through third support plates (76), and the second lead screw (71) and the third guide column (72) penetrate through two mounting frames (3) respectively, and the connection mode of the second lead screw (71) and the mounting frame (3) is screw connection.

7. A method of welding a high pressure pipe using the high pressure pipe welding apparatus according to claim 1, characterized by: The method comprises the following steps: Step one: clamp and fix the main pipeline through the clamping support, and the opening of the to-be-welded part on the main pipeline faces upward, drive the mounting frame (3) and the movable seat (2) to move to the preset position through the translation mechanism; Step two: place the sub-pipeline to be welded on the top of the main pipeline, fix the sub-pipeline through the positioning structure on the mounting frame (3), and drive the two welding adjustment structures to drive the two mounting seats (5) to rotate by ninety degrees respectively, so as to correct the welding starting position of the mounting seat (5) and the laser welding assembly; Step three: two welding adjustment structures respectively drive two mounting seats (5) to reverse one hundred and eighty degrees, and the laser welding assembly welds the connection between the branch pipe and the main pipe, after welding, two welding adjustment structures respectively drive two mounting seats (5) to rotate ninety degrees, so that the mounting seat (5) and the laser welding assembly reset to the initial position relative to the mounting shell (6); Step four: the positioning structure is released from the fixing of the branch pipe, the mounting frame (3) and the movable seat (2) are driven by the translation mechanism to move to the next preset position, return to step two until all the branch pipes are welded, the clamping support is released from the clamping and fixing of the main pipe, and the worker can take down the welded pipe.

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