A circumferential seam welding device for metal tube busbar

Abstract

The invention discloses a circumferential seam welding device for a metal tube busbar, which relates to the field of tube busbar welding and comprises a support frame seat, wherein a driving motor is axially slidably mounted inside the support frame seat, and a stirring welding assembly is arranged at the output end of the driving motor, a supporting liner tube and two tube busbars are arranged below the stirring welding assembly, and the supporting liner tube is arranged inside the tube busbars, a vertical slot is provided on the arc surface of the supporting liner tube, and the vertical slot faces upward, and a rounded corner is arranged on the edge line of one end of the vertical slot away from the axis of the supporting liner tube. The invention uses a keyhole filling unit and an injection unit, and can inject a filling material of the same material into the keyhole when the high-speed rotating stirring welding assembly leaves between the two tube busbars, thereby realizing automatic filling of the keyhole after the stirring welding is completed, and combined with the function of the supporting liner tube, it can also prevent the filling material from dripping directly to the bottom of the keyhole.

Description

Technical Field

[0001] The invention relates to the field of tubular busbar welding, in particular to a circumferential seam welding device for a metal tubular busbar. Background Art

[0002] Tubular busbars are mainly used in my country's power construction projects as conductor connections between power grid transmission lines and substation transformers, jumpers in transmission lines, connecting conductors in power equipment, and as overcurrent conductors in large current DC ice melting devices. They are new conductors that replace traditional rectangular, trough, and rod-shaped busbars and soft wires. They are one of the key equipment (materials) in power transmission and transformation systems, and play a vital role in the safe and reliable operation of transmission and transformation systems and power equipment. Tubular busbars are generally made of copper alloy or aluminum alloy, with a wall thickness ranging from 3mm to 12mm, and a single length of up to 15 meters.

[0003] During the production and use of the tube busbar, the ends of the two tube busbars need to be circumferentially welded to extend the tube busbar. The circumferential welding of the tube busbar on the market is mostly stir friction welding, that is, a high-speed rotating stirring needle is drilled into the annular seam. The heat generated by the high-speed rotation between the stirring needle and the busbar can melt the material near the annular seam from solid to plastic fluid, so that the mixed plastic material fills the annular seam;

[0004] However, there is an obvious disadvantage in friction stir welding. Due to the different wall thicknesses of the processed busbars, if the stirring needle is too long and passes through the weld, it is easy to break during the processing; if the stirring needle cannot completely pass through the weld in order to ensure the service life of the stirring needle, then after the welding is completed, the lower layer of the weld will be unwelded. This state will cause the annular seam of the busbar to be unable to be completely welded, and the unwelded part will affect the effect of electrical transmission; if in order to increase the service life of the longer stirring needle, the thick diameter of the stirring needle will be increased, but this will result in a larger keyhole formed after the welding is completed. Summary of the invention

[0005] The object of the present invention is to provide a circumferential seam welding device for a metal tube busbar to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a circumferential seam welding device for a metal tube busbar, comprising: a support frame, a driving motor is axially slidably mounted inside the support frame, and a stirring welding assembly is arranged at the output end of the driving motor, a supporting liner and two tube busbars are placed below the stirring welding assembly, and the supporting liner is placed inside the tube busbar, a vertical notch is opened on the arc surface of the supporting liner, and the vertical notch faces upward, and a rounded corner is arranged on the edge line of one end of the vertical notch away from the axis of the supporting liner, wherein a motor and a threaded rod fixed to the output end of the motor are fixedly arranged on the top of the support frame, and a mounting block is fixedly sleeved on the outer surface of the driving motor, and the mounting block is threadedly sleeved on the outside of the threaded rod, and the mounting block is also slidably mounted inside the support frame, thereby driving the driving motor and the stirring welding assembly to move up and down;

[0007] It also includes: a keyhole filling unit, which is used to fill the keyhole generated by welding between two of the tube busbars, and the keyhole filling unit is located inside the stirring welding assembly;

[0008] The injection unit is used to assist the keyhole filling unit in conveying the filling material into the keyhole, and the injection unit is installed between the support frame and the keyhole filling unit.

[0009] Preferably, the stirring welding assembly includes a fixed part, an arc connecting plate is fixedly arranged between the fixed part and the output end of the driving motor, a movable part is slidably sleeved on an end of the fixed part away from the arc connecting plate, and the movable part is fixed to the fixed part by a radially installed bolt, a stirring shaft body and a drill head are fixedly arranged on an end of the movable part away from the fixed part, and a receiving cavity is coaxially arranged inside the fixed part, the movable part, the stirring shaft body and the drill head, at least one branch channel is arranged inside the drill head, one end of the branch channel is connected to the receiving cavity, and the other end passes through the side wall of the drill head, wherein the stirring welding shaft with a split design can replace the stirring shaft body of the corresponding size according to the wall thickness of the pipe busbar, and the interior of the receiving cavity and the branch channel can be injected with fluid-like filling material in advance, and the filling material is consistent with the material of the pipe busbar.

[0010] Preferably, the keyhole filling unit includes a metal piston block slidably assembled inside the accommodating cavity, and an optical axis that movably passes through the fixing portion is fixedly installed on the end of the metal piston block away from the drill head portion, a tension spring is also fixedly arranged between the end of the metal piston block away from the drill head portion and the fixing portion, an embedding disk is also fixedly arranged on the top of the optical axis, and the embedding disk is slidably mounted on the outside of the arc connecting plate. When the stirring shaft body and the drill head portion rotate at high speed between the two pipe busbars, the heat generated can also melt the filling material in the accommodating cavity and make the filling material in a fluid state. When the metal piston block moves downward, the fluid filling material can be squeezed out through the branch channel.

[0011] Preferably, the injection unit includes a limit sleeve block sleeved on the outside of the assembling disk, a bearing assembly is provided between the assembling disk and the limit sleeve block, a mounting block is placed on the outside of the driving motor, and a frame rod is fixedly provided between the mounting block and the supporting frame seat, a positioning column is fixedly provided on the bottom of the mounting block, and the end of the limit sleeve block away from the arc connecting plate is slidably sleeved on the outside of the positioning column, a limit component and a release component are provided between the limit sleeve block and the mounting block, and when the driving motor and the arc connecting plate move downward as a whole, the limit sleeve block can move downward synchronously under the action of the positioning column.

[0012] Preferably, the limiting component includes a vertical plate located on the side of the positioning column away from the arc connecting plate, the top of the vertical plate is elastically slidably mounted inside the mounting block, the sliding direction of the vertical plate is that the vertical plate elastically slides in the direction away from the positioning column, a plurality of tooth grooves equidistantly distributed in a straight line are provided on an end face of the vertical plate close to the positioning column, and a card block is assembled on an end portion of the limiting sleeve close to the vertical plate through elastic rotation of a latch and a coil spring, a baffle is movably fitted under the card block, and the baffle is fixedly connected to the limiting sleeve, wherein the coil spring applies an elastic force to the card block to swing downward, and the baffle blocks the downward swing of the card block, so that the card block can only swing upward.

[0013] Preferably, the release component includes a rotating shaft rotatably hoisted below the mounting block, and the rotating shaft is hollow, the rotating shaft and the vertical plate are vertically distributed, and the rotating shaft is located on the side of the vertical plate away from the limiting sleeve block, an elliptical cam is fixedly sleeved on the outer surface of the rotating shaft, and the arc surface of the elliptical cam is movably fitted with the side wall of the vertical plate, a piston push rod is slidably inserted in the end of the rotating shaft away from the elliptical cam, a short axis straight groove and a long axis straight groove are opened in the interior of the elliptical cam, and the long axis straight groove and the short axis straight groove are respectively The elliptical cam is arranged at the long axis position and the short axis position, and the short axis straight groove and the long axis straight groove are vertically distributed, the short axis straight groove and the long axis straight groove are mutually connected with the inside of the rotating shaft, and a docking piece is arranged between the short axis straight groove and the long axis straight groove and the vertical plate, and a turntable is fixedly mounted on the outer surface of the rotating shaft. When the long axis end of the elliptical cam presses the vertical plate, the vertical plate is at the position closest to the positioning column at this time, and when the elliptical cam rotates, the vertical plate will move in the direction away from the positioning column under the action of the spring inside the mounting block.

[0014] Preferably, the docking member includes a piston disk slidably arranged inside the short-axis straight groove and the long-axis straight groove, and a first pin slidingly passing through the elliptical cam is fixedly arranged at one end of the piston disk away from the rotating shaft, a first spring is also fixedly arranged between one end of the piston disk away from the rotating shaft and the elliptical cam, a sliding disk is slidably arranged inside the vertical plate, and a second pin slidingly passing through the vertical plate is fixedly arranged at one end of the sliding disk close to the elliptical cam, and a second spring is arranged between the other end of the sliding disk and the vertical plate, the axis of the second pin intersects perpendicularly with the axis of the rotating shaft, and the outer diameter of the second pin is consistent with the outer diameter of the first pin, when the piston push rod is not pressed, the first pin is completely inside the elliptical cam, and the second pin can be just embedded in the hole accommodating the first pin under the action of the second spring, so that the position of the vertical plate and the elliptical cam is limited by the insertion of the second pin.

[0015] Preferably, a cooling unit for dissipating heat for the bearing assembled between the mounting disk and the limiting sleeve is arranged inside the limiting sleeve, and the cooling unit includes a cooling channel opened inside the limiting sleeve, and the cooling channel includes an arc segment and straight segments arranged at both ends of the arc segment, the arc segment is concentric with the mounting disk, and a cavity is arranged at one end of the two straight segments away from the arc segment, an impeller is arranged on a rotating frame inside the cavity, and a driving component is arranged between the arc connecting plate and the impeller, wherein the cavity and the cooling channel are filled with cooling liquid, and the cooling liquid flows between the cavity and the cooling channel under the action of the driving component.

[0016] Preferably, the driving component includes a gear differential case fixedly arranged on the top of the limiting sleeve block, and the output end of the gear differential case is rotatably embedded in the interior of the cavity, the output end of the gear differential case and the outer surface of the rotating shaft of the impeller are fixedly fitted with bevel gears, and the two bevel gears are meshed with each other, the outer surface of the arc connecting plate is slidably fitted with a second gear, and the input end of the gear differential case is fixedly provided with a first gear movably meshed with the second gear, the outer surface of the second gear is fixedly fitted with two downwardly distributed extension disks, and the first gear is located between the two extension disks, the interior of the extension disk is fixedly embedded with a first magnetic ring, and the upper and lower end surfaces of the first gear are fixedly embedded with a second magnetic ring, the facing end surfaces of the first magnetic ring and the second magnetic ring close to each other are the same magnetic poles, and through the principle of like poles repelling each other, the upper and lower end surfaces of the first gear can be prevented from fitting with the extension disk, thereby avoiding serious wear on the upper and lower end surfaces of the first gear.

[0017] Preferably, a plurality of heat sinks equidistantly distributed in a circle are fixedly mounted on the outer wall of the arc segment, a second heat sink is fixedly mounted on one end of the heat sink extending into the interior of the arc segment, and a plurality of corrugated strips equidistantly distributed in a straight line are inserted inside the second heat sink, a first heat sink is fixedly mounted on one end of the heat sink away from the second heat sink, and a plurality of through holes are provided inside the first heat sink, and a fan wheel is also fixedly mounted on the outer surface of the output end of the drive motor, wherein the second heat sink, the corrugated strips, the heat sink and the first heat sink are all made of copper.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention uses a keyhole filling unit and an injection unit, and can inject a filling material of the same material into the keyhole when the high-speed rotating stirring welding assembly leaves between the two pipe busbars, thereby automatically filling the keyhole after the stirring welding is completed. In addition, the function of supporting the liner tube can also prevent the filling material from dripping directly to the bottom of the keyhole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is an overall side view of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the stirring welding assembly of the present invention;

[0023] Figure 4 This is a schematic diagram of the internal structure of the accommodating chamber of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the limiting component of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the docking piece of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle;

[0027] Figure 8 This is a schematic diagram of the internal structure of the limiting sleeve block of the present invention;

[0028] Fig. 9 This is a schematic diagram of the structure of the first gear and the second gear of the present invention;

[0029] Fig.10 It is a front view of the meshing state of the first gear and the second gear of the present invention;

[0030] Fig.11 It is a schematic diagram of the structure of the first heat sink, the second heat sink and the corrugated strip plate of the present invention.

[0031] In the figure: 1. Support frame; 2. Pipe busbar; 3. Support liner; 4. Driving motor; 5. Fixed part; 6. Movable part; 7. Stirring shaft body; 8. Drill head; 9. Fillet part; 10. Arc connecting plate; 11. Mounting plate; 12. Optical axis; 13. Metal piston block; 14. Tension spring; 15. Accommodating cavity; 16. Diverter channel; 17. Limiting sleeve block; 18. Mounting block; 19. Frame rod; 20. Block; 21. Baffle; 22. Vertical plate; 23. Tooth groove; 24. Positioning column; 25. Rotating shaft; 26. Short shaft straight groove; 27 , long axis straight groove; 28, elliptical cam; 29, turntable; 30, piston push rod; 31, piston plate; 32, first latch; 33, first spring; 34, sliding plate; 35, second latch; 36, second spring; 37, cavity; 38, impeller; 39, cooling channel; 40, bevel gear; 41, heat sink; 42, fan wheel; 43, first heat sink; 44, second heat sink; 45, corrugated strip; 46, gear differential box; 47, first gear; 48, second gear; 49, first magnetic ring; 50, second magnetic ring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: Please refer to Figure 1-Figure 7, a circumferential seam welding device for a metal tube busbar shown in the figure comprises: a support frame 1, a driving motor 4 is axially slidably mounted inside the support frame 1, and a stirring welding assembly is arranged at the output end of the driving motor 4, a supporting liner 3 and two tube busbars 2 are placed below the stirring welding assembly, and the supporting liner 3 is placed inside the tube busbar 2, a vertical notch is opened on the arc surface of the supporting liner 3, and the vertical notch faces upward, and a rounded corner 9 is arranged on the edge line of one end of the vertical notch away from the axis of the supporting liner 3, wherein a motor and a threaded rod fixed to the output end of the motor are fixedly arranged on the top of the support frame 1, and a mounting block is fixedly sleeved on the outer surface of the driving motor 4, and the mounting block is threadedly sleeved on the outside of the threaded rod, and the mounting block is also slidably embedded in the interior of the support frame 1, thereby driving the driving motor 4 and the stirring welding assembly to move up and down;

[0034] It also includes: a keyhole filling unit, which is used to fill the keyhole generated by welding between the two tube busbars 2, and the keyhole filling unit is located inside the stirring welding assembly;

[0035] The injection unit is used to assist the keyhole filling unit in conveying the filling material into the keyhole, and the injection unit is installed between the support frame 1 and the keyhole filling unit.

[0036] The stirring welding assembly includes a fixed part 5, an arc connecting plate 10 is fixedly arranged between the fixed part 5 and the output end of the driving motor 4, a movable part 6 is slidably sleeved on one end of the fixed part 5 away from the arc connecting plate 10, and the movable part 6 is fixed to the fixed part 5 by a radially installed bolt, a stirring shaft body 7 and a drill head 8 are fixedly arranged on one end of the movable part 6 away from the fixed part 5, and a receiving cavity 15 is coaxially provided inside the fixed part 5, the movable part 6, the stirring shaft body 7 and the drill head 8, and at least one branch channel 16 is provided inside the drill head 8, one end of the branch channel 16 is connected to the receiving cavity 15, and the other end passes through the side wall of the drill head 8, wherein the stirring welding shaft with a split design can replace the stirring shaft body 7 of the corresponding size according to the wall thickness of the tubular busbar 2, and the interior of the receiving cavity 15 and the branch channel 16 can be injected with fluid-like filling material in advance, and the filling material is consistent with the material of the tubular busbar 2.

[0037] The keyhole filling unit includes a metal piston block 13 slidably assembled inside the accommodating cavity 15, and an optical axis 12 that movably passes through the fixing portion 5 is fixedly installed at the end of the metal piston block 13 away from the drill head 8, and a tension spring 14 is fixedly arranged between the end of the metal piston block 13 away from the drill head 8 and the fixing portion 5, and an embedding disk 11 is also fixedly arranged on the top of the optical axis 12, and the embedding disk 11 is slidably mounted on the outside of the arc connecting plate 10. When the stirring shaft body 7 and the drill head 8 rotate at high speed between the two pipe busbars 2, the heat generated can also melt the filling material in the accommodating cavity 15 and make the filling material in a fluid state. When the metal piston block 13 moves downward, the fluid filling material can be squeezed out through the branch channel 16.

[0038] The injection unit includes a limit sleeve 17 which is sleeved on the outside of the mounting disk 11, and a bearing is assembled between the mounting disk 11 and the limit sleeve 17. A mounting block 18 is placed on the outside of the drive motor 4, and a frame rod 19 is fixedly arranged between the mounting block 18 and the support frame 1. A positioning column 24 is fixedly installed on the bottom of the mounting block 18, and one end of the limit sleeve 17 away from the arc connecting plate 10 is slidably sleeved on the outside of the positioning column 24. A limit component and a release component are arranged between the limit sleeve 17 and the mounting block 18. When the drive motor 4 and the arc connecting plate 10 move downward as a whole, the limit sleeve 17 can move downward synchronously under the action of the positioning column 24.

[0039] The limiting component includes a vertical plate 22 located on the side of the positioning column 24 away from the arc connecting plate 10, the top of the vertical plate 22 is elastically slidably mounted inside the mounting block 18, and the sliding direction of the vertical plate 22 is that the vertical plate 22 elastically slides in the direction away from the positioning column 24, and a plurality of tooth grooves 23 are provided on one end surface of the vertical plate 22 close to the positioning column 24, and a card block 20 is assembled on one end of the limiting sleeve 17 close to the vertical plate 22 through a latch and a coil spring to elastically rotate, and a baffle 21 is movably fitted under the card block 20, and the baffle 21 is fixedly connected to the limiting sleeve 17, wherein the coil spring applies an elastic force to the card block 20 to swing downward, and the baffle 21 blocks the downward swing of the card block 20, so that the card block 20 can only swing upward.

[0040] The release component includes a rotating shaft 25 rotatably mounted below the mounting block 18, and the rotating shaft 25 is hollow. The rotating shaft 25 and the vertical plate 22 are vertically distributed, and the rotating shaft 25 is located on the side of the vertical plate 22 away from the limiting sleeve 17. The outer surface of the rotating shaft 25 is fixedly sleeved with an elliptical cam 28, and the arc surface of the elliptical cam 28 is movably fitted with the side wall of the vertical plate 22. A piston push rod 30 is slidably inserted into the end of the rotating shaft 25 away from the elliptical cam 28. The interior of the elliptical cam 28 is provided with a short axis straight groove 26 and a long axis straight groove 27, and the long axis straight groove 27 and the short axis straight groove 26 are respectively distributed on the elliptical cam 2 8, and the short axis straight groove 26 and the long axis straight groove 27 are vertically distributed, the short axis straight groove 26 and the long axis straight groove 27 are interconnected with the inside of the rotating shaft 25, and a docking piece is provided between the short axis straight groove 26 and the long axis straight groove 27 and the vertical plate 22, and a turntable 29 is also fixedly mounted on the outer surface of the rotating shaft 25. When the long axis end of the elliptical cam 28 presses the vertical plate 22, the vertical plate 22 is at the position closest to the positioning column 24 at this time, and when the elliptical cam 28 rotates, the vertical plate 22 will move in the direction away from the positioning column 24 under the action of the internal spring of the mounting block 18.

[0041] The docking member includes a piston plate 31 slidably arranged inside the short-axis straight groove 26 and the long-axis straight groove 27, and a first latch 32 that slides through the elliptical cam 28 is fixedly arranged at one end of the piston plate 31 away from the rotating shaft 25, and a first spring 33 is fixedly arranged between the end of the piston plate 31 away from the rotating shaft 25 and the elliptical cam 28, a sliding plate 34 is slidably arranged inside the vertical plate 22, and a second latch 35 that slides through the vertical plate 22 is fixedly arranged at one end of the sliding plate 34 close to the elliptical cam 28, and the other end of the sliding plate 34 is fixedly arranged. A second spring 36 is provided between one end and the vertical plate 22, the axis of the second latch 35 is perpendicular to the axis of the rotating shaft 25, and the outer diameter of the second latch 35 is consistent with the outer diameter of the first latch 32. When the piston push rod 30 is not pressed, the first latch 32 is completely inside the elliptical cam 28, and the second latch 35, under the action of the second spring 36, can just fit into the hole for accommodating the first latch 32, so that the position of the vertical plate 22 and the elliptical cam 28 is limited by the insertion of the second latch 35.

[0042] Working principle: two tubular busbars 2 are butt-clamped by using the existing rotating clamping equipment, and the butt-joint surfaces of the two tubular busbars 2 are located directly below the drill head 8. At the same time, a supporting liner 3 is inserted into the two tubular busbars 2. The difference between the outer diameter of the supporting liner 3 and the inner diameter of the tubular busbar 2 is 2-5 mm, and the vertical notch of the supporting liner 3 faces upward. When the tubular busbar 2 is circumferentially welded, the stirring welding assembly is first driven by the driving motor 4 to rotate at a high speed, and then the driving motor 4 and the stirring welding assembly are moved downward at the same time, so that the drill head 8 contacts the butt joint of the two tubular busbars 2. The high-speed rotation of the drill head 8 rubs against the two tubular busbars 2 at the same time, and the friction generates high temperature, so that the contact part between the tubular busbar 2 and the drill head 8 becomes a plastic state, that is, the drill head 8 is embedded in the two tubular busbars 2 with the stirring shaft body 7, so that about a quarter of the drill head 8 passes through the inner wall of the tubular busbar 2, and the drill head 8 is just inside the vertical notch of the supporting liner 3;

[0043] In the above state, the two tube busbars 2 are slowly rotated in the same direction and concentrically by the existing rotary clamping equipment. During the rotation process, the drill head 8 and the stirring shaft body 7 will rotate at a high speed at the joint of the two tube busbars 2, and the material will be changed into a fluid state and then solidified under the action of high temperature. After the drill head 8 and the stirring shaft body 7 complete a full circle of welding of the two tube busbars 2, the control driving motor 4 and the stirring welding assembly are controlled to rise and reset as a whole. Since the block 20 at the end of the limit sleeve 17 is restricted by the baffle 21 and the tooth groove 23 when moving upward, the limit sleeve 17 cannot be reset upward, that is, during the rising process of the stirring welding assembly, the positions of the optical axis 12 and the metal piston block 13 do not change;

[0044] Because the filling material is injected into the accommodating cavity 15 during the stirring welding between the interior of the accommodating cavity 15 and the drill head 8, the filling material is consistent with the material of the tubular busbar 2, and the filling material is also a solid metal substance inside the accommodating cavity 15. When the drill head 8 and the stirring shaft body 7 rotate at high speed with the tubular busbar 2 by friction, the heat generated melts the solid metal substance inside the accommodating cavity 15 into a liquid state. When the metal piston block 13 sinks inside the accommodating cavity 15, the melted filling material can be squeezed out through the branch channel 16 and filled in the position of the keyhole. When the drill head 8 completely leaves the tubular busbar 2, the keyhole between the two tubular busbars 2 is also completely filled, and the liquid filling material after filling will solidify quickly without being heated, so that after the friction stir welding of the annular seam of the two tubular busbars 2, the keyhole can be directly filled, avoiding the need for secondary filling processing later, and ensuring the integrity of the welding between the two tubular busbars 2.

[0045] During the process of filling the keyhole, since the drill head 8 is moved out from the inside of the vertical slot, the supporting liner 3 should be operated to slowly rotate between the two busbars 2. During the rotation, part of the filling material flowing out from the bottom of the keyhole can be evenly spread on the inner wall of the welding part of the two busbars 2.

[0046] After welding is completed, most of the filling material inside the accommodating cavity 15 is squeezed out, and the driving motor 4 no longer drives the stirring welding assembly to rotate. After the stirring welding assembly cools down, the two first latches 32 are squeezed out by pressing the piston push rod 30, and the second latch 35 is pushed out from the inside of the elliptical cam 28 through the first latch 32. At this time, the staff can rotate the elliptical cam 28 through the turntable 29 to make the short axis of the elliptical cam 28 contact the vertical plate 22. At this time, the vertical plate 22 moves away from the positioning column 24 under the push of the internal spring of the mounting block 18, so that the clamping block 20 is separated from the tooth groove 23. After the limiting sleeve block 17 is no longer restricted, under the action of the tension spring 14 in the stretched state, the optical axis 12 brings the metal piston block 13 to quickly reset upward;

[0047] In this solution, the tension spring 14 can also be fixedly installed between the bottom of the mounting plate 11 and the top of the fixing portion 5 .

[0048] Example 2: Please refer to Figure 5 and Figure 6 This embodiment is a further explanation of the first embodiment. A cooling unit is provided inside the limiting sleeve 17 to dissipate heat for the bearings assembled between the mounting disk 11 and the limiting sleeve 17. The cooling unit includes a cooling channel 39 opened inside the limiting sleeve 17. The cooling channel 39 includes an arc segment and straight segments arranged at both ends of the arc segment. The arc segment is concentric with the mounting disk 11, and a cavity 37 is arranged at one end of the two straight segments away from the arc segment. An impeller 38 is arranged on a rotating frame inside the cavity 37. A driving component is arranged between the arc connecting plate 10 and the impeller 38. The cavity 37 and the cooling channel 39 are filled with cooling liquid, and the cooling liquid flows between the cavity 37 and the cooling channel 39 under the action of the driving component.

[0049] The driving component includes a gear differential case 46 fixedly arranged on the top of the limiting sleeve 17, and the output end of the gear differential case 46 is rotatably embedded in the cavity 37, the output end of the gear differential case 46 and the outer surface of the rotating shaft of the impeller 38 are fixedly covered with a bevel gear 40, and the two bevel gears 40 are meshed with each other, the outer surface of the arc connecting plate 10 is slidably covered with a second gear 48, and the input end of the gear differential case 46 is fixedly provided with a first gear 47 movably meshed with the second gear 48, the outer surface of the second gear 48 is fixedly covered with two downwardly distributed extension disks, and the first gear 47 is located between the two extension disks, the interior of the extension disk is fixedly embedded with a first magnetic ring 49, and the upper and lower end surfaces of the first gear 47 are fixedly embedded with a second magnetic ring 50, the facing end surfaces of the first magnetic ring 49 and the second magnetic ring 50 that are close to each other are the same magnetic poles, and the upper and lower end surfaces of the first gear 47 can be prevented from fitting with the extension disk through the principle of like poles repelling each other, thereby avoiding the situation where there is severe wear on the upper and lower end surfaces of the first gear 47;

[0050] Furthermore, balls distributed equidistantly around the circumference may be mounted on the upper and lower end surfaces of the first gear 47, and the balls may be used instead of magnetic rings to isolate the first gear 47 and the two extension disks.

[0051] In this embodiment: Considering that the bearing will generate heat during high-speed rotation, if the heat continues, the lubricating medium in the bearing will evaporate, dry and eventually carbonize, which will increase the wear of the bearing. In addition, excessive heat generation of the bearing will cause deformation and expansion, which will accelerate the aging and fatigue of the bearing material, shorten the life of the bearing, and easily damage it.

[0052] In this solution, the limiting sleeve 17 is made of copper alloy or aluminum alloy, which has good thermal conductivity. The cooling liquid quickly flows between the cooling channel 39 and the cavity 37, thereby improving the heat dissipation of the bearing between the mounting plate 11 and the limiting sleeve 17, avoiding overheating of the bearing and causing damage to the bearing.

[0053] Example 3: Please refer to Figure 8 and Fig.11 This embodiment is a further explanation of the second embodiment. The outer wall of the arc segment is fixedly embedded with a plurality of heat sinks 41 which are equidistantly distributed in a circle. The end of the heat sink 41 extending into the arc segment is fixedly provided with a second heat sink 44, and the interior of the second heat sink 44 is inserted with a plurality of corrugated strips 45 which are equidistantly distributed in a straight line. The end of the heat sink 41 away from the second heat sink 44 is fixedly provided with a first heat sink 43, and the interior of the first heat sink 43 is provided with a plurality of through holes. The outer surface of the output end of the drive motor 4 is also fixedly provided with a fan wheel 42, wherein the second heat sink 44, the corrugated strips 45, the heat sink 41 and the first heat sink 43 are all made of copper.

[0054] In this embodiment: through the design of the second heat sink 44, the corrugated strips 45, the heat sink block 41 and the first heat sink 43, the heat of the cooling liquid can be guided to the outside air, and the fan wheel 42 can rotate at a high speed following the output end of the drive motor 4, and deliver a high-speed airflow toward the first heat sink 43, thereby accelerating the speed of temperature dissipation on the surface of the first heat sink 43, thereby improving the effect of heat diffusion in the cooling liquid to the outside.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circumferential seam welding device for a metal tube busbar, characterized in that: include: A support frame (1), wherein a driving motor (4) is axially slidably mounted inside the support frame (1), and a stirring welding assembly is provided at the output end of the driving motor (4), a supporting liner (3) and two pipe busbars (2) are placed below the stirring welding assembly, and the supporting liner (3) is placed inside the pipe busbars (2), a vertical notch is provided on the arc surface of the supporting liner (3), and the vertical notch faces upward, and a rounded corner portion (9) is provided on the edge line of one end of the vertical notch away from the axis of the supporting liner (3); Also includes: A keyhole filling unit, used for filling the keyhole generated by welding between two tube busbars (2), the keyhole filling unit being located inside the stirring welding assembly; An injection unit, used to assist the keyhole filling unit in conveying the filling material into the keyhole, the injection unit being installed between the support frame (1) and the keyhole filling unit; The stirring welding assembly comprises a fixed portion (5), a circular arc connecting plate (10) is fixedly arranged between the fixed portion (5) and the output end of the driving motor (4), a movable portion (6) is slidably sleeved on one end of the fixed portion (5) away from the circular arc connecting plate (10), and the movable portion (6) is fixed to the fixed portion (5) by means of radially installed bolts, a stirring shaft body (7) and a drill head (8) are fixedly arranged on one end of the movable portion (6) away from the fixed portion (5), and a receiving cavity (15) is coaxially provided inside the fixed portion (5), the movable portion (6), the stirring shaft body (7) and the drill head (8), and at least one flow branch (16) is provided inside the drill head (8), one end of the flow branch (16) is in communication with the receiving cavity (15), and the other end thereof passes through a side wall of the drill head (8); The keyhole filling unit comprises a metal piston block (13) slidably mounted inside the accommodating cavity (15), and an optical axis (12) movably penetrating the fixing portion (5) is fixedly mounted on the end of the metal piston block (13) away from the drill portion (8), a tension spring (14) is fixedly arranged between the end of the metal piston block (13) away from the drill portion (8) and the fixing portion (5), and an assembling plate (11) is fixedly arranged on the top of the optical axis (12), and the assembling plate (11) is slidably mounted on the outside of the arc connecting plate (10); The injection unit comprises a limiting sleeve block (17) sleeved on the outside of the mounting plate (11), a bearing assembly is provided between the mounting plate (11) and the limiting sleeve block (17), a mounting block (18) is placed on the outside of the drive motor (4), a frame rod (19) is fixedly provided between the mounting block (18) and the support frame seat (1), a positioning column (24) is fixedly provided on the bottom of the mounting block (18), and an end of the limiting sleeve block (17) away from the arc connecting plate (10) is slidably sleeved on the outside of the positioning column (24), and a limiting component and a releasing component are provided between the limiting sleeve block (17) and the mounting block (18); The limiting component comprises a vertical plate (22) located on a side of the positioning column (24) away from the arc connecting plate (10), the top of the vertical plate (22) is elastically slidably mounted inside the mounting block (18), the sliding direction of the vertical plate (22) is elastically sliding in a direction away from the positioning column (24), a plurality of tooth grooves (23) are provided on an end surface of the vertical plate (22) close to the positioning column (24) and are equidistantly distributed in a straight line, and a clamping block (20) is elastically rotatably assembled at one end of the limiting sleeve (17) close to the vertical plate (22) through a latch and a coil spring, a baffle (21) is movably fitted below the baffle (20), and the baffle (21) is fixedly connected to the limiting sleeve (17); The release component comprises a rotating shaft (25) rotatably mounted below the mounting block (18), and the rotating shaft (25) is hollow. The rotating shaft (25) and the vertical plate (22) are vertically distributed, and the rotating shaft (25) is located on a side of the vertical plate (22) away from the limiting sleeve (17). An elliptical cam (28) is fixedly sleeved on the outer surface of the rotating shaft (25), and the arc surface of the elliptical cam (28) is movably fitted with the side wall of the vertical plate (22). A piston push rod (30) is slidably inserted into the interior of one end of the rotating shaft (25) away from the elliptical cam (28). The elliptical cam A short axis straight groove (26) and a long axis straight groove (27) are provided inside the elliptical cam (28). The long axis straight groove (27) and the short axis straight groove (26) are respectively distributed at the long axis position and the short axis position of the elliptical cam (28). The short axis straight groove (26) and the long axis straight groove (27) are vertically distributed. The short axis straight groove (26) and the long axis straight groove (27) are both interconnected with the inside of the rotating shaft (25). A docking piece is provided between the short axis straight groove (26) and the long axis straight groove (27) and the vertical plate (22). A rotating disk (29) is also fixedly mounted on the outer surface of the rotating shaft (25).

2. The circumferential seam welding device for a metal tube busbar according to claim 1, characterized in that: The docking member comprises a piston disc (31) slidably arranged inside the short-axis straight groove (26) and the long-axis straight groove (27), and a first latch (32) slidably passing through the elliptical cam (28) is fixedly arranged at one end of the piston disc (31) away from the rotating shaft (25), and a first spring (33) is fixedly arranged between the end of the piston disc (31) away from the rotating shaft (25) and the elliptical cam (28), a sliding disc (34) is slidably arranged inside the vertical plate (22), and a second latch (35) slidably passing through the vertical plate (22) is fixedly arranged at one end of the sliding disc (34) close to the elliptical cam (28), and a second spring (36) is arranged between the other end of the sliding disc (34) and the vertical plate (22), the axis of the second latch (35) and the axis of the rotating shaft (25) are perpendicularly intersected, and the outer diameter of the second latch (35) is consistent with the outer diameter of the first latch (32).

3. The circumferential seam welding device for a metal tube busbar according to claim 1, characterized in that: A cooling unit is arranged inside the limiting sleeve (17) for dissipating heat for the bearing assembled between the mounting disk (11) and the limiting sleeve (17). The cooling unit comprises a cooling channel (39) opened inside the limiting sleeve (17). The cooling channel (39) comprises an arc segment and straight segments arranged at both ends of the arc segment. The arc segment is concentric with the mounting disk (11), and a cavity (37) is arranged at one end of the two straight segments away from the arc segment. An impeller (38) is arranged on a rotating frame inside the cavity (37). A driving component is arranged between the arc connecting plate (10) and the impeller (38).

4. The circumferential seam welding device for a metal tube busbar according to claim 3, characterized in that: The driving component comprises a gear differential case (46) fixedly arranged on the top of the limiting sleeve (17), and the output end of the gear differential case (46) is rotatably embedded in the cavity (37), the output end of the gear differential case (46) and the outer surface of the rotating shaft of the impeller (38) are both fixedly sleeved with bevel gears (40), and the two bevel gears (40) are meshed with each other, the outer surface of the arc connecting plate (10) is slidably sleeved with a second gear (48), and the input end of the gear differential case (46) is fixedly arranged with a first gear (47) that is movably meshed with the second gear (48), the outer surface of the second gear (48) is fixedly sleeved with two downwardly distributed extension disks, and the first gear (47) is located between the two extension disks, the interior of the extension disk is fixedly embedded with a first magnetic ring (49), and the upper and lower end surfaces of the first gear (47) are fixedly embedded with a second magnetic ring (50), and the facing end surfaces of the first magnetic ring (49) and the second magnetic ring (50) that are close to each other have the same magnetic poles.

5. The circumferential seam welding device for a metal tube busbar according to claim 3, characterized in that: The outer wall of the arc segment is fixedly embedded with a plurality of heat dissipation blocks (41) distributed equidistantly in a circle; a second heat dissipation fin (44) is fixedly arranged at one end of the heat dissipation block (41) extending into the interior of the arc segment, and a plurality of corrugated strips (45) distributed equidistantly in a straight line are inserted inside the second heat dissipation fin (44); a first heat dissipation fin (43) is fixedly arranged at one end of the heat dissipation block (41) away from the second heat dissipation fin (44), and a plurality of through holes are opened inside the first heat dissipation fin (43); and a fan wheel (42) is also fixedly sleeved on the outer surface of the output end of the drive motor (4).

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