A pressure vessel submerged arc welding external welding device and external welding method thereof

Abstract

The invention discloses a submerged arc welding external welding device for a pressure vessel and an external welding method thereof, and belongs to the technical field of submerged arc welding external welding; it comprises a supporting base; a submerged arc welding device is arranged on the side of the supporting base; it also comprises: a flip bracket, the flip bracket is movably arranged on one side of the supporting base; a rotating ring is rotatably connected inside the flip bracket; a rotating cylinder is movably connected inside the rotating ring; a threaded clamping assembly is arranged on the rotating cylinder; a movable bracket, the movable bracket is movably arranged on the other side of the supporting base; a threaded fixing assembly is arranged on the movable bracket; a rotating driving mechanism, the rotating driving mechanism comprises a telescopic supporting assembly and two flip driving assemblies; a movable flipping assembly is also arranged on the movable bracket; the submerged arc welding external welding device for a pressure vessel and the external welding method thereof of the invention are convenient for the hoisting and movement of the tank body and the tank bottom, and when driving the tank body and the tank bottom to flip, it can ensure the stable flipping of the tank body and the tank bottom.

Description

Technical Field

[0001] The invention relates to a submerged arc welding external welding device for a pressure vessel and an external welding method thereof, belonging to the technical field of submerged arc welding external welding. Background Art

[0002] Pressure vessels are storage components used to store high-pressure gas or liquid in the prior art. In order to ensure the stability of pressure vessels when storing high-pressure gas and liquid, pressure vessels generally use an integrated casting method to form the tank body and tank bottom of the pressure vessel, and then weld the tank body and tank bottom together; and because the tank body and tank bottom both have a certain thickness, the prior art usually uses submerged arc welding to weld the tank body and tank bottom. Submerged arc welding refers to processing a slope surface on the welding surface of the tank body and tank bottom in advance, and then using a clamping tool to fix and align the tank body and tank bottom together, using the feeding assembly in the submerged arc welding external welding device to spread a layer of flux on the welding point of the tank body and tank bottom, and then using the welding wire to generate an arc to heat the inside of the flux layer while driving the tank body and tank bottom to rotate, and finally melt the flux to weld the tank body and tank bottom together.

[0003] In the process of welding the tank body and tank bottom of the pressure vessel using the submerged arc welding external welding device, firstly, because the tank body and the tank bottom are homogeneous and heavy, the tank body and the tank bottom are often moved by hoisting in the prior art; and before welding, the tank body can be hoisted and moved more conveniently because both ends of the tank body have openings; but the tank bottom is a disc-shaped component with a certain arc, so it is difficult to stably hoist the tank bottom vertically, and it is difficult to align the tank bottom with the tank body after hoisting the tank bottom; and in the process of driving the tank bottom and the tank body to rotate synchronously, because the pressure vessel is generally large in size and has a smooth outer surface, it is usually used to The bottom transmission method of the tank body and the tank bottom drives the tank body and the tank body to rotate, but the friction transmission method of the bottom of the tank body and the tank bottom will first generate a moving upward force during the flipping process of the tank body and the tank bottom, which is easy to cause the tank body and the tank bottom to vibrate up and down during the flipping process. Even if the clamping device is used to squeeze the tank body and the tank bottom downward, on the one hand, as the vibration phenomenon continues to occur, the clamping of the tank body and the tank bottom is prone to unstable, affecting the quality of welding between the tank body and the tank bottom by the welding wire, and using a clamping tool to excessively clamp the tank body and the tank bottom during the flipping process is also easy to increase the force of the tank body and the tank bottom on the bottom transmission device. Therefore, in order to solve the above problems, it is urgent to propose a submerged arc welding external welding device and an external welding method for pressure vessels. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a submerged arc welding external welding device and an external welding method for a pressure vessel, which is convenient for lifting and moving the tank body and the tank bottom, and when the tank body and the tank bottom are turned over during the welding process, the turning stability of the tank body and the tank bottom is ensured.

[0005] The submerged arc welding external welding device for pressure vessels of the present invention comprises a support base; a submerged arc welding device is arranged on the side of the support base; and further comprises:

[0006] A flip bracket, wherein the flip bracket is movably arranged on one side of the support base; a rotating ring is rotatably connected in the flip bracket; a rotating cylinder is movably connected in the rotating ring; a threaded clamping assembly is arranged on the rotating cylinder; a driving assembly for driving the threaded clamping assembly or driving the rotating cylinder to rotate is arranged on the rotating ring;

[0007] A movable bracket, the movable bracket is movably arranged on the other side of the support base; the movable bracket is provided with a threaded fixing component;

[0008] The rotation drive mechanism comprises a telescopic support assembly and two flip drive assemblies; the two flip drive assemblies are rotatably arranged on both sides of the telescopic support assembly; and a mobile flip assembly is also arranged on the mobile bracket.

[0009] Furthermore, the rotating ring is movably mounted on the flip bracket via a rotating shaft; one end of the rotating shaft is fixed to the rotating ring, and the other end of the rotating shaft passes through the flip bracket and is movably connected to the flip bracket; a third drive motor is also installed on the outside of the flip bracket; and mutually meshing transmission gears are respectively installed on the output shaft of the third drive motor and the corresponding rotating shaft.

[0010] Furthermore, the threaded clamping assembly includes a first threaded disk and a plurality of first threaded seats threadedly connected to the first threaded disk; the first threaded disk is rotatably connected to the inner side of the rotating cylinder; the plurality of first threaded seats are evenly distributed on the rotating cylinder and slidably connected to the rotating cylinder; an arc plate is installed on each of the first threaded seats; a plurality of elastic support plates are fixedly connected to the inner arc surface of the arc plate.

[0011] Furthermore, the driving assembly includes a sliding plate body fixedly mounted on the side of the rotating ring, and a first electric cylinder arranged on the sliding plate body, and a mounting seat fixedly connected to the output end of the first electric cylinder, and a first driving motor arranged on the mounting seat, and an engaging seat connected to the output shaft of the first driving motor, and an upper engaging through cylinder and a lower engaging through cylinder engaged with the outer wall of the engaging seat; the upper engaging through cylinder is fixedly mounted on the bottom of the first threaded disk; the lower engaging through cylinder is fixedly mounted on the bottom of the rotating cylinder; an ferrous ring is arranged on the periphery of the upper engaging through cylinder; a plurality of electromagnetic parts are arranged on the inner circumference of the rotating cylinder; and the ferrous ring is rotatably arranged between the plurality of electromagnetic parts.

[0012] Further, the threaded fixing assembly includes a fixed cylinder, a second threaded disk rotatably connected to the inside of the fixed cylinder, and a plurality of second threaded seats threadedly connected to the second threaded disk; the fixed cylinder is fixedly mounted on the mobile bracket; a plurality of second threaded seats are evenly distributed on the fixed cylinder and slidably connected to the fixed cylinder; each of the second threaded seats is provided with an arc-shaped groove; a plurality of rotating wheels are rotatably connected in the arc-shaped groove;

[0013] A rotating structure is also provided between the second threaded disk and the fixed cylinder; the rotating structure includes a fourth drive motor and a first drive gear connected to the output shaft of the fourth drive motor; the fourth drive motor is arranged on the side of the fixed cylinder; a first internal tooth groove is provided on the second threaded disk; and the first internal tooth groove is meshed with the first drive gear.

[0014] Furthermore, the telescopic support assembly includes a support member, a first sliding cylinder installed on the support member, a second electric cylinder arranged inside the first sliding cylinder, a sliding support plate fixedly connected to the output end of the second electric cylinder, and an arc-shaped frame connected to the other end of the sliding support plate; the sliding support plate is slidably installed inside the first sliding cylinder; and the bottom of the arc-shaped frame is connected to an elastic cylinder.

[0015] Furthermore, the flip driving assembly includes a rotating member, a rotating shaft movably connected to the rotating member, a second sliding cylinder connected to the rotating shaft through a support, a third electric cylinder arranged inside the second sliding cylinder, a fixed slide fixedly connected to the output end of the third electric cylinder, a rotating frame connected to the other end of the fixed slide, a second driving motor arranged outside the rotating frame, and a driving wheel connected to the output shaft of the second driving motor; the driving wheel is rotatably arranged inside the rotating frame; the fixed slide is slidably arranged inside the second sliding cylinder;

[0016] A reverse rotation structure is also provided between the two rotating shafts located on both sides; the reverse rotation structure includes a first bevel gear respectively provided on the two rotating shafts, a second bevel gear meshing with the first bevel gear, and a dual-axis motor transmission-connected to the second bevel gear; the dual-axis motor is fixedly mounted on the first sliding cylinder.

[0017] Further, the mobile flip assembly includes a mounting cylinder, a transmission threaded sleeve rotatably connected to the mounting cylinder, a mobile screw threadedly connected to the transmission threaded sleeve, and a flip frame fixedly mounted on the mobile screw; the mounting cylinder is fixedly connected to the fixed cylinder; a driving structure is provided between the mounting cylinder and the transmission threaded sleeve; a sliding bar is fixedly connected to the mounting cylinder; a sliding groove is provided on the mobile screw; the sliding bar is slidably connected to the sliding groove; a driving shaft is rotatably connected to the flip frame; the driving shaft is fixedly connected to the support member;

[0018] The driving structure includes a sixth driving motor and a second driving gear connected to the output shaft of the sixth driving motor; the sixth driving motor is arranged on the mounting cylinder; the transmission threaded sleeve is provided with a second internal tooth groove; the second internal tooth groove is meshed with the second driving gear;

[0019] A flip driving structure is also arranged between the driving shaft and the flip frame; the flip driving structure includes a seventh driving motor, a main gear connected to the output shaft of the seventh driving motor, and a sub-gear meshing with the main gear; the seventh driving motor is arranged on the inner side of the flip frame; and the sub-gear is arranged at the end of the driving shaft.

[0020] The submerged arc welding external welding method for a pressure vessel of the present invention comprises the following steps:

[0021] Step 1: fix the can body, hoist and move the can body to the upper side of the support base, then drive the mobile bracket to move on the support base, move one side of the can body between the multiple arc-shaped trough bodies, drive the second threaded disk to rotate in the fixed cylinder through the rotating structure, make the multiple second threaded seats move in the fixed cylinder, and fix one side of the can body between the multiple rotating wheels of the multiple arc-shaped trough bodies;

[0022] Step 2: flip the rotating cylinder, rotate the rotating shaft, make the rotating ring and the rotating cylinder rotate together with the rotating shaft, make the multiple arc plates face upward, and then hoist the tank bottom flatly, and hoist the tank bottom between the multiple arc plates;

[0023] Step three, fix the tank bottom, start the first electric cylinder to drive the mounting seat to slide on the sliding plate body, make the first drive motor and the engagement seat move longitudinally, make the engagement seat rise to the upper engagement cylinder connected to the first threaded disk, make the engagement seat keep engaging with the inner wall of the upper engagement cylinder; then start the first drive motor, through the engagement relationship between the engagement seat and the upper engagement cylinder, drive the first threaded disk to rotate, make the elastic support plates on the multiple arc plates contact with the outer wall of the tank bottom; then drive the rotating shaft to rotate, move the tank bottom to the side close to the tank body, drive the flip bracket to move, make the welding areas of the tank body and the tank bottom aligned with each other;

[0024] Step 4: Move and rotate the drive mechanism, and make the first sliding cylinder and the second sliding cylinder parallel to the can body by cooperating with the flipping drive structure and the driving shaft, and drive the transmission threaded sleeve to rotate in the installation cylinder through the driving structure, so that the moving screw slides between the sliding bars and moves into the can body, and moves the first sliding cylinder and the second sliding cylinder into the can body, and drives the driving shaft to rotate, so that the first sliding cylinder and the second sliding cylinder are flipped upward, so that the first sliding cylinder and the second sliding cylinder are kept vertical in the can body;

[0025] Step 5, moving the arc frame, starting the second electric cylinder to push the sliding support plate to slide in the first sliding cylinder, so that the arc frame contacts the top of the inner wall of the can body;

[0026] Step 6: Move the driving wheel, start the dual-axis motor to drive the two second bevel gears to rotate, and drive the rotating shaft to rotate in the rotating member through the meshing relationship between the first bevel gear and the second bevel gear, so that the second sliding cylinder and the support are turned over together with the rotating shaft, and the positions of the second sliding cylinder and the driving wheel are adjusted. According to the different inner diameters of the can body, the driving wheel is in contact with the two side areas of the inner wall of the can body, and then the third electric cylinder is started to drive the fixed slide to move in the second sliding cylinder, so that the driving wheel is in contact with the inner wall of the can body;

[0027] Step seven, submerged arc welding operation, start the second drive motor to drive the drive wheel to rotate in the rotating frame, so that the drive wheel drives the can body to flip and rotate, and start the first electric cylinder to drive the first drive motor and the engaging seat to move, so that the engaging seat enters the lower engaging cylinder connected to the rotating cylinder, and the engaging seat is engaged with the lower engaging cylinder; then start the first drive motor, through the meshing relationship between the engaging seat and the lower engaging cylinder, drive the rotating cylinder to rotate in the rotating ring, and the rotation of the can body and the tank bottom is kept synchronous, and then use the submerged arc welding equipment to weld the can body and the tank body.

[0028] Compared with the prior art, the submerged arc welding external welding device and external welding method for pressure vessels of the present invention can, during the process of hoisting and moving the tank body and the tank bottom, perform safer and more convenient post-hoisting fixation operations on the tank body and the tank bottom according to the hoisting characteristics of the tank body and the tank bottom, and can effectively ensure that the tank body and the tank bottom remain stable during the flipping welding process when driving the tank body and the tank bottom, thereby avoiding vibration problems during the flipping welding process of the tank body and the tank bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the present invention.

[0031] Figure 3It is a partial cross-sectional structural schematic diagram of the cooperation among the flip bracket, the threaded clamping assembly and the driving assembly in the present invention.

[0032] Figure 4 For the present invention Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.

[0033] Figure 5 It is a partial cross-sectional structural schematic diagram of the coordination of the flip bracket, the threaded clamping assembly and the driving assembly in the present invention from another perspective.

[0034] Figure 6 It is a partial cross-sectional structural schematic diagram of the coordination of the fixed cylinder, the threaded fixing assembly, the telescopic support assembly, the flip driving assembly and the movable flip assembly in the present invention;

[0035] Figure 7 For the present invention Figure 6 Schematic diagram of the local enlarged structure at point B in the middle.

[0036] Figure 8 It is a partial cross-sectional structural schematic diagram of the cooperation between the telescopic support assembly and the flip drive assembly in the present invention.

[0037] Fig. 9 It is a partial cross-sectional structural schematic diagram of the cooperation of the telescopic support assembly, the flip drive assembly and the movable flip assembly in the present invention.

[0038] The components in the drawings are marked as follows: 100, thread clamping assembly; 200, driving assembly; 300, thread fixing assembly; 400, telescopic support assembly; 500, flip driving assembly; 600, mobile flip assembly;

[0039] 1. Support base; 2. Submerged arc welding equipment; 3. Flip bracket; 4. Rotating shaft; 5. Rotating ring; 6. Rotating cylinder; 7. Moving bracket; 8. First threaded disk; 9. First threaded seat; 10. Arc plate; 11. Elastic support plate; 12. Upper engagement cylinder; 13. Ferrous ring; 14. Electromagnetic member; 15. Engaging seat; 16. First drive motor; 17. Sliding plate; 18. First electric cylinder; 19. Fixed cylinder; 20. Second threaded disk; 21. Second threaded seat; 22. Arc groove; 23. Rotating wheel; 24. Support member; 25. First sliding cylinder; 26. Sliding support plate; 27. Second electric cylinder; 28. Arc frame; 29. ​​Elastic cylinder; 30. Rotating member; 31. Rotating shaft; 32. Second sliding Moving cylinder; 33, fixed slide plate; 34, third electric cylinder; 35, rotating frame; 36, driving wheel; 37, second driving motor; 38, mounting cylinder; 39, transmission threaded sleeve; 40, moving screw; 41, sliding bar; 42, driving shaft; 43, first bevel gear; 44, second bevel gear; 45, double-axis motor; 46, third driving motor; 47, transmission gear; 48, fourth driving motor; 49, first internal tooth groove; 50, first driving gear; 51, transmission screw; 52, fifth driving motor; 53, sixth driving motor; 54, second internal tooth groove; 55, second driving gear; 56, seventh driving motor; 57, main gear; 58, sub-gear; 59, lower meshing cylinder; 60, mounting seat. DETAILED DESCRIPTION

[0040] Embodiment 1:

[0041] like Figures 1 to 9 The submerged arc welding external welding device for pressure vessels shown in the figure comprises a support base 1; a submerged arc welding device 2 is arranged on the side of the support base 1; the submerged arc welding device is a prior art device well known to those skilled in the art, and the output part of the submerged arc welding device 2 is generally composed of a feeding assembly and a wire feeding assembly, the feeding assembly is used to spread a flux layer on the welding area, and the wire feeding assembly is used to use a welding wire to perform welding operations on the welding areas of the tank body and the tank bottom, thereby completing the welding operations on the tank body and the tank bottom; and further comprises:

[0042] A flip bracket 3, wherein the flip bracket 3 is movably arranged on one side of the support base 1; a rotating ring 5 is rotatably connected inside the flip bracket 3; a rotating cylinder 6 is movably connected inside the rotating ring 5; a threaded clamping assembly 100 is arranged on the rotating cylinder 6; a driving assembly 200 for driving the threaded clamping assembly 100 or driving the rotating cylinder 6 to rotate is arranged on the rotating ring 5;

[0043] The rotating ring 5 is movably mounted on the flip bracket 3 through the rotating shaft 4; one end of the rotating shaft 4 is fixed to the rotating ring 5, and the other end of the rotating shaft 4 passes through the flip bracket 3 and is movably connected to the flip bracket 3; a third driving motor 46 is also installed on the outer side of the flip bracket 3; the output shaft of the third driving motor 46 and the corresponding rotating shaft 4 are respectively installed with mutually meshing transmission gears 47;

[0044] The thread clamping assembly 100 includes a first threaded disc 8 and a plurality of first threaded seats 9 threadedly connected to the first threaded disc 8; the first threaded disc 8 is rotatably connected to the inner side of the rotating cylinder 6; the plurality of first threaded seats 9 are evenly distributed on the rotating cylinder 6 and are slidably connected to the rotating cylinder 6; an arc plate 10 is installed on each of the first threaded seats 9; a plurality of elastic support plates 11 are fixedly connected to the inner arc surface of the arc plate 10;

[0045] When it is necessary to drive the rotating shaft 4 to rotate so that the rotating ring 5 and the rotating cylinder 6 are turned over along the center point of the rotating shaft 4, the third driving motor 46 is started, and the rotating shaft 4 is driven to rotate through the meshing relationship of the two transmission gears 47, so that the rotating ring 5 and the rotating cylinder 6 are turned over along the center point of the rotating shaft 4, so that the multiple arc plates 10 face upward, and then when the tank bottom is hoisted, the tank bottom can be placed flat for hoisting and moving, and the tank bottom is moved between the multiple arc plates 10 on the upper side of the rotating cylinder 6, and then the first threaded disk 8 is driven to rotate so that the multiple first threaded seats 9 are in the rotating cylinder 6. The curved plates 10 are moved so that the elastic supporting plates 11 on the multiple curved plates 10 are in contact with the outer wall of the tank bottom. Since the outer wall of the tank bottom is curved and the bottom of the tank bottom is flat, after the curved plates 10 are moved to the vicinity of the tank bottom, the elastic supporting plates 11 of the curved plates 10 are in contact with the corresponding position of the tank bottom. The elastic supporting plates 11 have a certain deformation ability, so that the elastic supporting plates 11 can be in close contact with the flat end surface of the bottom of the tank bottom, so that the tank bottom is kept fixed between the multiple curved plates 10, and can also be kept fixed after the tank bottom is turned over along the center point of the rotating shaft 4 to the side close to the moving bracket 7.

[0046] The driving assembly 200 includes a sliding plate body 17 fixedly mounted on the side of the rotating ring 5, and a first electric cylinder 18 arranged on the sliding plate body 17, and a mounting seat 60 fixedly connected to the output end of the first electric cylinder 18, and a first driving motor 16 arranged on the mounting seat 60, and an engaging seat 15 connected to the output shaft of the first driving motor 16, and an upper engaging cylinder 12 and a lower engaging cylinder 59 engaged with the outer wall of the engaging seat 15; the upper engaging cylinder 12 is fixedly mounted on the bottom of the first threaded disk 8; the lower engaging cylinder 12 is fixedly mounted on the bottom of the rotating cylinder 6; an ferrous ring 13 is arranged on the periphery of the upper engaging cylinder 12; a plurality of electromagnetic components 14 are arranged on the inner circumference of the rotating cylinder 6; the ferrous ring 13 is rotatably arranged between the plurality of electromagnetic components 14;

[0047] When the first threaded disk 8 needs to be moved, the first electric cylinder 18 is started to drive the mounting seat 60 to slide on the sliding plate body 17, so that the first drive motor 16 and the engagement seat 15 are moved longitudinally, so that the engagement seat 15 rises into the upper engagement cylinder 12 connected to the first threaded disk 8, so that the engagement seat 15 is kept in engagement with the inner wall of the upper engagement cylinder 12; then the first drive motor 16 is started, and the first threaded disk 8 is driven to rotate through the engagement relationship between the engagement seat 15 and the upper engagement cylinder 12; and when it is necessary to drive the rotating cylinder 6 to rotate, the first electric cylinder 18 is started to drive the first drive motor 16 and the engagement seat 15 to move, so that the engagement seat 15 enters the engagement relationship with the rotating cylinder 6 is connected to the lower meshing through cylinder 59, so that the meshing seat 15 is meshed with the lower meshing through cylinder 59, and then the first driving motor 16 is started to drive the rotating cylinder 6 to rotate in the rotating ring 5 through the meshing relationship between the meshing seat 15 and the lower meshing through cylinder 59; and in order to keep the first threaded disk 8 in the rotating cylinder 6 stable during the rotation of the rotating cylinder 6, after the first threaded disk 8 stops rotating, the electromagnetic member 14 is powered so that the electromagnetic member 14 is magnetically connected to the ferrous ring 13 to prevent the first threaded disk 8 from rotating in the rotating cylinder 6, and the electromagnetic member 14 is a common electromagnetic device in the prior art, and the electromagnetic member 14 is powered so that it is magnetically connected to the ferrous ring 13;

[0048] A movable bracket 7, the movable bracket 7 is movably arranged on the other side of the supporting base 1; a threaded fixing component 300 is arranged on the movable bracket 7;

[0049] The threaded fixing assembly 300 includes a fixed cylinder 19, a second threaded disc 20 rotatably connected to the inside of the fixed cylinder 19, and a plurality of second threaded seats 21 threadedly connected to the second threaded disc 20; the fixed cylinder 19 is fixedly mounted on the movable bracket 7; a plurality of second threaded seats 21 are evenly distributed on the fixed cylinder 19 and slidably connected to the fixed cylinder 19; each of the second threaded seats 21 is provided with an arc-shaped groove 22; a plurality of rotating wheels 23 are rotatably connected in the arc-shaped groove 22;

[0050] A rotating structure is also provided between the second threaded disc 21 and the fixed cylinder 19; the rotating structure includes a fourth driving motor 48 and a first driving gear 50 connected to the output shaft of the fourth driving motor 48; the fourth driving motor 48 is provided on the side of the fixed cylinder 19; a first internal tooth groove 49 is provided on the second threaded disc 20; the first internal tooth groove 49 is meshed with the first driving gear 50;

[0051] After the can body is hoisted between the multiple arc-shaped trough bodies 22, the fourth drive motor 48 is started, and the second threaded disk 20 is driven to rotate in the fixed cylinder 19 through the meshing relationship between the first drive gear 50 and the first internal tooth groove 49, so that the multiple second threaded seats 21 are moved in the fixed cylinder 19, and one side of the can body is fixed between the multiple rotating wheels 23 of the multiple arc-shaped trough bodies 22; wherein, both sides of the support base 1 are rotatably connected with a transmission screw 51, the flip bracket 3 and the movable bracket 7 are threadedly connected with the corresponding transmission screw 51, and the fifth drive motor 52 is also provided on both sides of the support base 1, and the output end of the fifth drive motor 52 is fixedly connected to the transmission screw 51 on the same side; when it is necessary to move the flip bracket 3 or the movable bracket 7, the fifth drive motor 52 is started to drive the transmission screw 51 to rotate, so that the flip bracket 3 or the movable bracket 7 moves horizontally on the support base 1;

[0052] The rotation driving mechanism is used to drive the can body to rotate, and the rotation driving mechanism includes a telescopic support assembly 400 and two flip driving assemblies 500; the two flip driving assemblies 500 are rotatably arranged on both sides of the telescopic support assembly 400; the mobile bracket 7 is also provided with a mobile flip assembly 600;

[0053] The telescopic support assembly 400 includes a support member 24, a first sliding cylinder 25 mounted on the support member 24, a second electric cylinder 27 disposed inside the first sliding cylinder 25, a sliding support plate 26 fixedly connected to the output end of the second electric cylinder 27, and an arc frame 28 connected to the other end of the sliding support plate 26; the sliding support plate 26 is slidably mounted inside the first sliding cylinder 25; the bottom of the arc frame 28 is connected to an elastic cylinder 29;

[0054] When the telescopic support assembly 400 is moved to the inside of the can body, the second electric cylinder 27 is started to push the sliding support plate 26 to slide in the first sliding cylinder 25, so that the arc frame 28 contacts the top of the inner wall of the can body, so that the can body remains stable during the flipping and moving process, and after the arc frame 28 is fitted with the top of the can body, the arc frame 28 is located directly below the feeding assembly of the submerged arc welding equipment 2. When the submerged arc welding equipment 2 spreads a flux layer between the can body and the can body, the flux leaked between the can body and the can body will enter the elastic cylinder 29 in the arc frame 28, which is used to collect the leaked flux for easy recycling;

[0055] The flip driving assembly 500 includes a rotating member 30, a rotating shaft 31 movably connected to the rotating member 30, a second sliding cylinder 32 connected to the rotating shaft 31 through a support, a third electric cylinder 34 arranged inside the second sliding cylinder 32, and a fixed slide 33 fixedly connected to the output end of the third electric cylinder 34, and a rotating frame 35 connected to the other end of the fixed slide 33, and a second driving motor 37 arranged outside the rotating frame 35, and a driving wheel 36 connected to the output shaft of the second driving motor 37; the driving wheel 36 is rotatably arranged inside the rotating frame 35; the fixed slide 33 is slidably arranged inside the second sliding cylinder 32;

[0056] A reverse rotation structure is also provided between the two rotating shafts 31 on both sides; the reverse rotation structure comprises a first bevel gear 43 respectively provided on the two rotating shafts, a second bevel gear 44 meshing with the first bevel gear 43, and a double-shaft motor 45 drivingly connected to the second bevel gear 44; the double-shaft motor 45 is fixedly mounted on the first sliding cylinder 25;

[0057] After the flipping drive assembly 500 is moved to the inside of the can body, the dual-axis motor 45 is first started to drive the two second bevel gears 44 to rotate, and the meshing relationship between the first bevel gear 43 and the second bevel gear 44 drives the rotating shaft 31 to rotate in the rotating member 30, so that the second sliding cylinder 32 and the support are flipped together with the rotating shaft 31, and the positions of the second sliding cylinder 32 and the driving wheel 36 are adjusted. According to the different inner diameters of the can body, the driving wheel 36 is made to contact the two side areas of the inner wall of the can body, and then the third electric cylinder 34 is started to drive the fixed slide plate 33 to move in the second sliding cylinder 32, so that the driving wheel 36 is in contact with the inner wall of the can body, and the second driving motor 37 drives the driving wheel 36 to rotate in the rotating frame 35, so that the driving wheel 36 drives the can body to flip and rotate, and the flipping and rotation of the can body and the can body are kept synchronous;

[0058] The mobile flip assembly 600 includes a mounting cylinder 38, a transmission threaded sleeve 39 rotatably connected to the mounting cylinder 38, a moving screw 40 threadedly connected to the transmission threaded sleeve 39, and a flip frame fixedly mounted on the moving screw 40; the mounting cylinder 38 is fixedly connected to the fixed cylinder 19; a driving structure is provided between the mounting cylinder 38 and the transmission threaded sleeve 39; a sliding bar 41 is fixedly connected inside the mounting cylinder 38; a sliding groove (not shown) is provided on the moving screw 40; the sliding bar 41 is slidably connected to the sliding groove; a driving shaft 42 is rotatably connected inside the flip frame; the driving shaft 42 is fixedly connected to the support member 24;

[0059] The driving structure includes a sixth driving motor 53 and a second driving gear 55 connected to the output shaft of the sixth driving motor 53; the sixth driving motor 53 is arranged on the mounting cylinder 38; the transmission threaded sleeve 39 is provided with a second internal tooth groove 54; the second internal tooth groove 54 is meshed with the second driving gear 55;

[0060] A flip driving structure is also provided between the driving shaft 42 and the flip frame; the flip driving structure comprises a seventh driving motor 56, a main gear 57 connected to the output shaft of the seventh driving motor 56, and a sub-gear 58 meshing with the main gear 57; the seventh driving motor 56 is provided inside the flip frame; the sub-gear 58 is provided at the end of the driving shaft 42;

[0061] When it is necessary to drive the moving screw 40 to move horizontally and move the first sliding cylinder 25 and the second sliding cylinder 32 into the can body, the sixth driving motor 53 is started, and the transmission threaded sleeve 39 is driven to rotate in the installation cylinder 38 through the meshing relationship between the second internal tooth groove 54 and the second driving gear 55, so that the moving screw 40 slides between the sliding bars 41 and moves into the can body. When the can body is hoisted and moved between the flip bracket 3 and the moving bracket 7, in order to avoid the problem of collision between the can body, the first sliding cylinder 25 and the second sliding cylinder 32, the seventh driving motor is started. 56, the driving shaft 42 is driven to rotate through the meshing relationship between the main gear 57 and the sub-gear 58, so that the support member 24, the first sliding cylinder 25 and the second sliding cylinder 32 move together with the driving shaft 42. Because the first sliding cylinder 25 and the second sliding cylinder 32 enter the interior of the can body through the can mouth position of the can body, and the inner diameter of the can mouth area is generally smaller than the inner diameter of the interior of the can body, it is necessary to keep the first sliding cylinder 25 and the second sliding cylinder 32 parallel to the can body through the driving shaft 42 at this time, so as to facilitate the first sliding cylinder 25 and the second sliding cylinder 32 to move into the can body.

[0062] The submerged arc welding external welding method for a pressure vessel of the present invention comprises the following steps:

[0063] Step 1: fix the can body, hoist and move the can body to the upper side of the support base 1, then drive the movable bracket 7 to move on the support base 1, move one side of the can body between the multiple arc-shaped grooves 22, drive the second threaded disc 20 to rotate in the fixed cylinder 19 through the rotating structure, make the multiple second threaded seats 21 move in the fixed cylinder 19, and fix one side of the can body between the multiple rotating wheels 23 of the multiple arc-shaped grooves 22;

[0064] Step 2: flip the rotating cylinder 6, rotate the rotating shaft 4, make the rotating ring 5 and the rotating cylinder 6 rotate together with the rotating shaft 4, make the multiple curved plates 10 face upward, and then hoist the tank bottom flatly, and hoist the tank bottom between the multiple curved plates 10;

[0065] Step three, fix the tank bottom, start the first electric cylinder 18 to drive the mounting seat to slide on the sliding plate body 17, so that the first drive motor 16 and the engagement seat 15 move longitudinally, so that the engagement seat 15 rises into the upper engagement tube 12 connected to the first threaded disk 8, so that the engagement seat 15 keeps engaging with the inner wall of the upper engagement tube 12; then start the first drive motor 16, through the engagement relationship between the engagement seat 15 and the upper engagement tube 12, drive the first threaded disk 8 to rotate, so that the elastic support plates 11 on the multiple arc plates 10 contact the outer wall of the tank bottom; then drive the rotating shaft 4 to rotate, move the tank bottom to the side close to the tank body, drive the flip bracket 3 to move, so that the welding areas of the tank body and the tank bottom are aligned with each other;

[0066] Step 4: Move and rotate the drive mechanism, and make the first sliding cylinder 25 and the second sliding cylinder 32 parallel to the can body by cooperating with the flipping drive structure and the drive shaft 42. The transmission threaded sleeve 39 is driven by the drive structure to rotate in the installation cylinder 38, so that the moving screw 40 slides between the sliding bars 41 and moves into the can body, and the first sliding cylinder 25 and the second sliding cylinder 32 are moved into the can body, and the drive shaft 42 is driven to rotate, so that the first sliding cylinder 25 and the second sliding cylinder 32 are flipped upward, so that the first sliding cylinder 25 and the second sliding cylinder 32 are kept vertical in the can body;

[0067] Step 5, move the arc frame 28, start the second electric cylinder 27 to push the sliding support plate 26 to slide in the first sliding cylinder 25, so that the arc frame 28 contacts the top of the inner wall of the can body;

[0068] Step 6: Move the driving wheel 36, start the dual-axis motor 45 to drive the two second bevel gears 44 to rotate, and drive the rotating shaft 34 to rotate in the rotating member 30 through the meshing relationship between the first bevel gear 43 and the second bevel gear 44, so that the second sliding cylinder 32 and the support are turned over together with the rotating shaft 31, and the positions of the second sliding cylinder 32 and the driving wheel 36 are adjusted. According to the different inner diameters of the can body, the driving wheel 36 is made to contact the two side areas of the inner wall of the can body, and then the third electric cylinder 34 is started to drive the fixed slide plate 33 to move in the second sliding cylinder 32, so that the driving wheel 36 is in contact with the inner wall of the can body;

[0069] Step seven, submerged arc welding operation, start the second drive motor 37 to drive the drive wheel 36 to rotate in the rotating frame 35, so that the drive wheel 36 drives the can body to flip and rotate, and start the first electric cylinder 18 to drive the first drive motor 16 and the engaging seat 15 to move, so that the engaging seat 15 enters the lower engaging cylinder 59 connected to the rotating cylinder 6, so that the engaging seat 15 is engaged with the lower engaging cylinder 59; then start the first drive motor 16, through the meshing relationship between the engaging seat 15 and the lower engaging cylinder 59, drive the rotating cylinder 6 to rotate in the rotating ring 5, and the rotation of the can body and the bottom of the tank is kept synchronous, and then use the submerged arc welding equipment 2 to weld the can body and the tank body.

[0070] The submerged arc welding external welding device and external welding method of the pressure vessel of the present invention can perform safer and more convenient post-hoisting fixing operations on the tank body and the tank bottom according to the hoisting characteristics of the tank body and the tank bottom during the hoisting and moving process of the tank body and the tank bottom, and can effectively ensure that the tank body and the tank bottom remain stable during the flipping welding process when driving the tank body and the tank bottom, thereby avoiding the vibration problem during the flipping welding process of the tank body and the tank bottom;

[0071] The details are as follows: when it is necessary to weld the tank body and the tank bottom together, during the hoisting process of the tank body, the movable bracket 7 is driven to move horizontally on the supporting base 1, and one side of the tank body is moved between the multiple arc-shaped troughs 22, and one side of the tank body is fixed between the multiple rotating wheels 23 of the multiple arc-shaped troughs 22 by the threaded fixing assembly 300; and when the tank bottom is hoisted and moved, the tank bottom can be hoisted while being laid flat to keep the tank bottom stable during the hoisting process, and the rotating ring 5 and the rotating cylinder 6 are driven to rotate in the flip frame so that the multiple arc plates 10 face upward, and then the tank bottom is directly hoisted to the upper side of the rotating cylinder 6, and after the tank bottom is fixed and clamped by the threaded clamping assembly 100, the rotating cylinder 6 is driven to flip so that the corresponding sides of the tank bottom and the tank body are aligned with each other, and the welding operation of the tank bottom and the tank body is subsequently completed;

[0072] During the process of hoisting and moving the tank body, the heavy tank body can be effectively damped when being moved to the designated position, reducing the force acting on the tank body during hoisting and moving. During the process of hoisting and moving the tank bottom, the tank bottom can be hoisted and moved while being laid flat. After the tank bottom is moved to the designated position, the tank bottom can be in direct contact with the tank body in the future, thereby improving the safety of hoisting the tank bottom and the convenience of subsequent welding operations.

[0073] When it is necessary to drive the can body and the bottom of the can to rotate so that the submerged arc welding equipment 2 can weld the welding areas of the can body and the bottom of the can in sequence, first, the telescopic support assembly 400 and the flip drive assembly 500 are moved to the inside of the can body by moving the flip assembly 600, so that the arc frame 28 and the two driving wheels 36 are in contact with the inner wall of the can body, and the can body is flipped by driving the driving wheels 36 to rotate, and the arc frame 28 supports the can body. By driving the can body to rotate inside the can body, the can body can remain stable during the rotation process, and the can body is flipped during the contact process between the arc frame 28 and the driving wheel 36 and the inner wall of the can body, so as to avoid the vibration of the can body during the flipping process, and the rotating cylinder 6 is driven to rotate by the driving assembly 200, so that the can body and the can body can achieve the ability to rotate synchronously, so that the can body and the can body can be stably welded.

[0074] The above embodiments are only preferred implementations of the present invention, so all equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A pressure vessel submerged arc welding external welding device, comprising a support base; a submerged arc welding device is arranged on the side of the support base; characterized in that: Also includes: A flip bracket, wherein the flip bracket is movably arranged on one side of the support base; a rotating ring is rotatably connected in the flip bracket; a rotating cylinder is movably connected in the rotating ring; a threaded clamping assembly is arranged on the rotating cylinder; a driving assembly for driving the threaded clamping assembly or driving the rotating cylinder to rotate is arranged on the rotating ring; A movable bracket, the movable bracket is movably arranged on the other side of the support base; the movable bracket is provided with a threaded fixing component; A rotation drive mechanism, the rotation drive mechanism comprises a telescopic support assembly and two flip drive assemblies; the two flip drive assemblies are rotatably arranged on both sides of the telescopic support assembly; the mobile bracket is also provided with a mobile flip assembly; The driving assembly includes a sliding plate body fixedly mounted on the side of the rotating ring, a first electric cylinder arranged on the sliding plate body, a mounting seat fixedly connected to the output end of the first electric cylinder, a first driving motor arranged on the mounting seat, an engaging seat connected to the output shaft of the first driving motor, and an upper engaging through cylinder and a lower engaging through cylinder engaged with the outer wall of the engaging seat; the upper engaging through cylinder is fixedly mounted on the bottom of the first threaded disk; the lower engaging through cylinder is fixedly mounted on the bottom of the rotating cylinder; an ferrous ring is arranged on the periphery of the upper engaging through cylinder; a plurality of electromagnetic parts are arranged on the inner circumference of the rotating cylinder; the ferrous ring is rotatably arranged between the plurality of electromagnetic parts; The telescopic support assembly includes a support member, a first sliding cylinder mounted on the support member, a second electric cylinder arranged inside the first sliding cylinder, a sliding support plate fixedly connected to the output end of the second electric cylinder, and an arc frame connected to the other end of the sliding support plate; the sliding support plate is slidably mounted inside the first sliding cylinder; the bottom of the arc frame is connected to an elastic cylinder; The flip driving assembly includes a rotating member, a rotating shaft movably connected to the rotating member, a second sliding cylinder connected to the rotating shaft through a support, a third electric cylinder arranged inside the second sliding cylinder, a fixed slide fixedly connected to the output end of the third electric cylinder, a rotating frame connected to the other end of the fixed slide, a second driving motor arranged outside the rotating frame, and a driving wheel connected to the output shaft of the second driving motor; the driving wheel is rotatably arranged inside the rotating frame; the fixed slide is slidably arranged inside the second sliding cylinder; A reverse rotation structure is also provided between the two rotating shafts located on both sides; the reverse rotation structure includes a first bevel gear respectively provided on the two rotating shafts, a second bevel gear meshing with the first bevel gear, and a dual-axis motor transmission-connected to the second bevel gear; the dual-axis motor is fixedly mounted on the first sliding cylinder.

2. The pressure vessel submerged arc welding external welding device according to claim 1, characterized in that: The rotating ring is movably mounted on the flip bracket via a rotating shaft; one end of the rotating shaft is fixed to the rotating ring, and the other end of the rotating shaft passes through the flip bracket and is movably connected to the flip bracket; a third driving motor is also installed on the outside of the flip bracket; and mutually meshing transmission gears are respectively installed on the output shaft of the third driving motor and the corresponding rotating shaft.

3. The pressure vessel submerged arc welding external welding device according to claim 2, characterized in that: The threaded clamping assembly includes a first threaded disk and a plurality of first threaded seats threadedly connected to the first threaded disk; the first threaded disk is rotatably connected to the inner side of the rotating cylinder; the plurality of first threaded seats are evenly distributed on the rotating cylinder and slidably connected to the rotating cylinder; an arc plate is installed on each of the first threaded seats; a plurality of elastic support plates are fixedly connected to the inner arc surface of the arc plate.

4. The pressure vessel submerged arc welding external welding device according to claim 3, characterized in that: The threaded fixing assembly includes a fixed cylinder, a second threaded disk rotatably connected to the inside of the fixed cylinder, and a plurality of second threaded seats threadedly connected to the second threaded disk; the fixed cylinder is fixedly mounted on the mobile bracket; a plurality of second threaded seats are evenly distributed on the fixed cylinder and slidably connected to the fixed cylinder; each of the second threaded seats is provided with an arc-shaped groove; a plurality of rotating wheels are rotatably connected to the arc-shaped groove; A rotating structure is also provided between the second threaded disk and the fixed cylinder; the rotating structure includes a fourth drive motor and a first drive gear connected to the output shaft of the fourth drive motor; the fourth drive motor is arranged on the side of the fixed cylinder; a first internal tooth groove is provided on the second threaded disk; and the first internal tooth groove is meshed with the first drive gear.

5. The pressure vessel submerged arc welding external welding device according to claim 4, characterized in that: The mobile flip assembly includes a mounting cylinder, a transmission threaded sleeve rotatably connected to the mounting cylinder, a mobile screw threadedly connected to the transmission threaded sleeve, and a flip frame fixedly mounted on the mobile screw; the mounting cylinder is fixedly connected to the fixed cylinder; a driving structure is arranged between the mounting cylinder and the transmission threaded sleeve; a sliding bar is fixedly connected to the mounting cylinder; a sliding groove is arranged on the mobile screw; the sliding bar is slidably connected to the sliding groove; a driving shaft is rotatably connected to the flip frame; the driving shaft is fixedly connected to the support member; The driving structure includes a sixth driving motor and a second driving gear connected to the output shaft of the sixth driving motor; the sixth driving motor is arranged on the mounting cylinder; the transmission threaded sleeve is provided with a second internal tooth groove; the second internal tooth groove is meshed with the second driving gear; A flip driving structure is also arranged between the driving shaft and the flip frame; the flip driving structure includes a seventh driving motor, a main gear connected to the output shaft of the seventh driving motor, and a sub-gear meshing with the main gear; the seventh driving motor is arranged on the inner side of the flip frame; and the sub-gear is arranged at the end of the driving shaft.

6. A pressure vessel submerged arc welding method, using a pressure vessel submerged arc welding device according to claim 5, characterized in that: The following steps are involved: Step 1: fix the can body, hoist and move the can body to the upper side of the support base, then drive the mobile bracket to move on the support base, move one side of the can body between the multiple arc-shaped trough bodies, drive the second threaded disk to rotate in the fixed cylinder through the rotating structure, make the multiple second threaded seats move in the fixed cylinder, and fix one side of the can body between the multiple rotating wheels of the multiple arc-shaped trough bodies; Step 2: flip the rotating cylinder, rotate the rotating shaft, make the rotating ring and the rotating cylinder rotate together with the rotating shaft, make the multiple arc plates face upward, and then hoist the tank bottom flatly, and hoist the tank bottom between the multiple arc plates; Step three, fix the tank bottom, start the first electric cylinder to drive the mounting seat to slide on the sliding plate body, make the first drive motor and the engagement seat move longitudinally, make the engagement seat rise into the upper engagement cylinder connected to the first threaded disk, make the engagement seat keep engagement with the inner wall of the upper engagement cylinder; then start the first drive motor, through the engagement relationship between the engagement seat and the upper engagement cylinder, drive the first threaded disk to rotate, make the elastic support plates on the multiple arc plates contact with the outer wall of the tank bottom; Then drive the rotating shaft to rotate, move the tank bottom to the side close to the tank body, drive the flip bracket to move, and align the welding areas of the tank body and the tank bottom with each other; Step 4: Move and rotate the drive mechanism, and make the first sliding cylinder and the second sliding cylinder parallel to the can body by cooperating with the flipping drive structure and the driving shaft, and drive the transmission threaded sleeve to rotate in the installation cylinder through the driving structure, so that the moving screw slides between the sliding bars and moves into the can body, and moves the first sliding cylinder and the second sliding cylinder into the can body, and drives the driving shaft to rotate, so that the first sliding cylinder and the second sliding cylinder are flipped upward, so that the first sliding cylinder and the second sliding cylinder are kept vertical in the can body; Step 5, moving the arc frame, starting the second electric cylinder to push the sliding support plate to slide in the first sliding cylinder, so that the arc frame contacts the top of the inner wall of the can body; Step 6: Move the driving wheel, start the dual-axis motor to drive the two second bevel gears to rotate, and drive the rotating shaft to rotate in the rotating member through the meshing relationship between the first bevel gear and the second bevel gear, so that the second sliding cylinder and the support are turned over together with the rotating shaft, and the positions of the second sliding cylinder and the driving wheel are adjusted. According to the different inner diameters of the can body, the driving wheel is in contact with the two side areas of the inner wall of the can body, and then the third electric cylinder is started to drive the fixed slide to move in the second sliding cylinder, so that the driving wheel is in contact with the inner wall of the can body; Step seven, submerged arc welding operation, start the second drive motor to drive the drive wheel to rotate in the rotating frame, so that the drive wheel drives the can body to flip and rotate, and start the first electric cylinder to drive the first drive motor and the engaging seat to move, so that the engaging seat enters the lower engaging cylinder connected to the rotating cylinder, and the engaging seat is engaged with the lower engaging cylinder; then start the first drive motor, through the meshing relationship between the engaging seat and the lower engaging cylinder, drive the rotating cylinder to rotate in the rotating ring, and the rotation of the can body and the tank bottom is kept synchronous, and then use the submerged arc welding equipment to weld the can body and the tank body.

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