Laser welding protection device for corrugated pipe production

Abstract

The invention discloses a laser welding protection device for corrugated pipe production, which comprises a welding table and a laser welding assembly, the laser welding assembly moves on the top of the welding table through a transmission beam, a welding workpiece is arranged in the welding table through a lifting rack, the welding workpiece comprises a flow guide pipe sleeved in a corrugated pipe, and a boss is fixed on the top surface of the welding table. A butt joint transmission mechanism is arranged in the boss; the butt joint transmission mechanism comprises an electric actuator and a motor, the electric actuator can be started to drive eight sets of abutting wheels to abut against the outer surface of the corrugated pipe through a first driving assembly and a driving assembly, and the motor can be started to drive the eight sets of abutting wheels to rotate on the surface of the corrugated pipe through a second driving assembly and the driving assembly; according to the corrugated pipe laser welding device, a corrugated pipe and a flow guide pipe can be effectively and stably clamped, meanwhile, the rotating effect of the corrugated pipe in the welding process can be achieved, and therefore the position of a welding gun is stabilized.

Description

Technical Field

[0001] The invention relates to the technical field of welding clamping protection devices, and in particular to a laser welding protection device for corrugated pipe production. Background Art

[0002] The bellows is a protective device used to connect pipelines. It can achieve deformation and elongation within a specific range. It is also called a bellows compensator in the industrial field. The components of the bellows assembly are mainly divided into a bellows outer sleeve, a guide pipe, and flanges connected to both sides of the bellows. In the actual assembly production process, it is also necessary to assemble and weld it.

[0003] Welding work is usually divided into welding between bellows and flange and welding between bellows and flow guide pipe. For the welding of bellows and flow guide pipe, since the flow guide pipe is inside the bellows, the following problems may occur in the actual welding process:

[0004] 1. The flexibility of the bellows makes it difficult for the clamping assembly to achieve a relatively stable clamping during the actual docking process with the guide tube. The deformation of the bellows and the inaccurate docking position of the guide tube will seriously affect the quality of laser welding;

[0005] Second, the clamping assembly during the bellows welding process needs to be manually adjusted and clamped, and the position is fixed and cannot be rotated after clamping, which requires a rotating welding gun assembly to weld the arc-shaped welding surface, which greatly increases the requirements for welding accuracy.

[0006] Therefore, how to provide a laser welding protection device for corrugated pipe production is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0007] One purpose of the present invention is to provide a laser welding protection device for bellows production, which can effectively achieve stable clamping of the bellows and the guide tube, while satisfying the rotation effect of the bellows during welding, thereby stabilizing the position of the welding gun.

[0008] A laser welding protection device for corrugated pipe production according to an embodiment of the present invention comprises a welding table and a laser welding assembly, wherein the laser welding assembly moves on the top of the welding table through a transmission beam, a welding workpiece is arranged inside the welding table through a lifting platform, and the welding workpiece comprises a guide pipe sleeved inside the corrugated pipe, a boss is fixed on the top surface of the welding table, and a docking transmission mechanism is arranged inside the boss;

[0009] The docking transmission mechanism includes an electric actuator and a motor. When the electric actuator is started, it can drive eight sets of contact wheels to contact and dock with the outer surface of the corrugated pipe through the first driving component and the driving component. When the motor is started, it can drive the eight sets of contact wheels to rotate on the surface of the corrugated pipe through the second driving component and the driving component.

[0010] Clamping mechanisms are provided on both sides of the bottom of the laser welding assembly. The laser welding assembly resists the guide tube inside the bellows through the adjusting bolts in the clamping mechanism, and there is active resistance between the adjusting bolts and the bellows.

[0011] Furthermore, an engaging rod is fixed at the output end of the electric actuator, one end of the engaging rod is elastically connected to the boss through a return spring, and one side of the engaging rod is engaged with the first driving assembly.

[0012] Furthermore, the first driving component includes a first ring, eight groups of internal grooves and a single group of docking grooves, the docking grooves are fixed on the outer ring surface of the first ring, and the first ring is engaged with the engaging rod through the docking grooves, and several groups of internal groove annular arrays are fixed on the inner ring surface of the first ring, and the first ring is engaged with the driving teeth through the internal grooves.

[0013] Furthermore, the driving assembly includes a swing rod and two groups of mutually meshing transmission teeth, the two groups of transmission teeth are meshed with each other and are rotatably arranged at the bottom of the swing rod, one side of a single group of transmission teeth is meshed with the final stage teeth, the top of the final stage teeth is fixed to the interference wheel through a connecting shaft passing through the swing rod, one side of the single group of transmission teeth is meshed with the primary teeth, the top of the primary teeth rotates in a movable groove through a limit bearing, the movable groove is opened on one side of the bottom of the swing rod, and the driving teeth are fixed on the top of one side of the swing rod.

[0014] Furthermore, one side of the top of the swing rod is rotationally limited by a connecting shaft and a boss, and the axis of the connecting shaft on the surface of the swing rod coincides with the primary meshing teeth and the driving meshing teeth.

[0015] Furthermore, the second drive component includes a second ring, a continuous vortex groove and a continuous inner groove, the continuous vortex groove and the continuous inner groove are respectively arranged on the inner ring and the outer ring of the second ring, the second ring is engaged with the vortex rod on the motor output shaft through the continuous vortex groove, and the second ring is engaged with the primary meshing tooth through the continuous inner groove.

[0016] Furthermore, a support assembly is arranged between the first drive assembly and the second drive assembly, and the support assembly includes a partition plate, two groups of annular grooves and a plurality of groups of supporting balls. The two groups of annular grooves are respectively opened on the upper and lower sides of the partition plate, and annular grooves are opened on the upper and lower sides of the second ring ring and the first ring ring near the annular grooves.

[0017] Furthermore, a plurality of groups of supporting balls are rollingly arranged in the annular groove, and the first annular ring and the second annular ring are respectively connected to the partition plate through limited rotation between the supporting balls.

[0018] Furthermore, the clamping mechanism includes two groups of side ear rods and connecting rods. The connecting rods slide up and down in the side ear rods. A pressure spring is also arranged between the side ear rods and the connecting rods.

[0019] Furthermore, the connecting rod is elastically connected to the side ear rod through a pressure spring, an adjusting bolt is transversely threaded at the bottom of the connecting rod, a pressure wheel is provided at one end of the adjusting bolt for limited rotation, the side ear rod is fixed to the side of the laser welding assembly, and the pressure wheel is in contact with the top surface of the bellows.

[0020] The beneficial effects of the present invention are:

[0021] The present invention arranges the second driving assembly and the driving assembly. After the motor is started, the worm rod can directly drive the second ring to stably rotate in the supporting assembly, and the continuous inner groove at the inner ring position of the second ring can effectively drive the primary meshing teeth in the driving assembly to rotate in the movable groove at the bottom of the swing rod. Under the transmission effect of the transmission meshing teeth, the final meshing teeth directly drive the interference wheel to rotate, and the interference wheel conflicts with the outer ring position of the bellows at this time, thereby realizing the synchronous rotation of multiple groups of interference wheels to drive the bellows to stably rotate at the bottom of the laser welding assembly, so as to realize the rotary welding operation;

[0022] The present invention provides a first driving assembly and a driving assembly. After the electric actuator is started, it directly drives the meshing rod to move horizontally in the boss, and one side of the meshing rod meshes with the docking meshing groove. At the same time, the first ring is rotated as a whole under the limit of the support assembly. At this time, the inner meshing groove at the inner ring of the first ring rotates synchronously, driving the driving meshing teeth engaged with it to rotate, and the driving meshing teeth are fixed to the top of one side of the swing rod, so that the swing rod swings with the driving meshing teeth as the center of the circle, driving the interference wheel on one side to fit with the outside of the bellows to achieve a clamping effect. Conversely, under the elastic action of the reset spring, multiple groups of interference wheels can be loosened to the bellows, thereby facilitating the removal of the bellows and the guide tube.

[0023] The present invention arranges clamping mechanisms on both sides of the laser welding assembly. When the laser welding assembly is driven to move downward, the connecting rod will be driven downward synchronously, so that the pressure wheel contacts the top of the guide tube. At this time, the laser welding assembly continues to descend, and the connecting rod is resisted to compress the pressure spring between the side ear rod and the connecting rod, thereby realizing elastic deformation of the pressure spring, thereby providing the pressure wheel with a stable resistance force on the guide tube, ensuring stable contact between the guide tube and the corrugated tube, and ensuring welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of a laser welding protection device for bellows production proposed by the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of a boss of a laser welding protection device for corrugated pipe production proposed by the present invention.

[0027] Figure 3 This is a schematic diagram of the connection structure of the clamping mechanism of a laser welding protection device for corrugated pipe production proposed by the present invention.

[0028] Figure 4 This is a schematic diagram of the connection of a transmission mechanism for a laser welding protection device for corrugated pipe production proposed by the present invention.

[0029] Figure 5 This is a schematic diagram of the disassembled structure of the docking transmission mechanism of a laser welding protection device for corrugated pipe production proposed by the present invention.

[0030] Figure 6 This is a schematic diagram of the external structure of a boss of a laser welding protection device for corrugated pipe production proposed by the present invention.

[0031] Figure 7 This is a schematic diagram of the connection structure of the components of a laser welding protection device for corrugated pipe production proposed by the present invention.

[0032] Figure 8 A laser welding protection device for corrugated pipe production proposed by the present invention Figure 2 A magnified schematic diagram of the structure at point A.

[0033] In the figure: 1. welding table; 2. laser welding assembly; 3. welding workpiece; 4. lifting table; 5. boss; 6. clamping mechanism; 7. docking transmission mechanism; 8. abutment wheel;

[0034] 31. bellows; 32. flow guide tube; 61. side ear rod; 62. connecting rod; 63. pressure spring; 64. adjusting bolt; 65. pressure wheel; 71. electric actuator; 72. motor; 73. meshing rod; 74. first drive assembly; 75. second drive assembly; 76. worm rod; 77. return spring; 78. support assembly; 79. driving assembly;

[0035] 741, first ring; 742, inner meshing groove; 743, docking meshing groove; 751, second ring; 752, continuous vortex groove; 753, continuous inner groove; 781, partition plate; 782, annular groove; 783, supporting ball; 791, swing rod; 792, final meshing teeth; 793, transmission meshing teeth; 794, primary meshing teeth; 795, movable notch; 796, driving meshing teeth. DETAILED DESCRIPTION

[0036] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0037] refer to Figure 1-Figure 8 , including a welding table 1 and a laser welding assembly 2, the laser welding assembly 2 moves on the top of the welding table 1 through a transmission beam, a welding workpiece 3 is mounted inside the welding table 1 through a lifting table 4, the welding workpiece 3 includes a guide tube 32 sleeved inside a bellows 31, a boss 5 is fixed on the top surface of the welding table 1, and a docking transmission mechanism 7 is arranged inside the boss 5;

[0038] The docking transmission mechanism 7 includes an electric actuator 71 and a motor 72. When the electric actuator 71 is started, it can drive the eight sets of contact wheels 8 to contact and dock with the outer surface of the bellows 31 through the first driving component 74 and the driving component 79. When the motor 72 is started, it can drive the eight sets of contact wheels 8 to rotate on the surface of the bellows 31 through the second driving component 75 and the driving component 79.

[0039] The laser welding assembly 2 is provided with a clamping mechanism 6 on both sides of the bottom. The laser welding assembly 2 is used to resist the guide tube 32 inside the bellows 31 through the adjusting bolt 64 in the clamping mechanism 6. The adjusting bolt 64 is in active resistance against the bellows 31.

[0040] In this embodiment, the lifting platform 4 directly provides a supporting effect for the bellows 31 and the guide tube 32 at the bottom of the welding platform 1, and at the same time satisfies the up and down adjustment to achieve the effect of discharging, and the movable effect of the laser welding assembly 2 on the top of the welding platform 1 can meet the lateral and longitudinal movement effects in the vertical plane, so as to achieve the alignment of the welding gun head with the gap between the guide tube 32 and the bellows 31;

[0041] When the electric actuator 71 and the motor 72 in the docking transmission mechanism 7 are started respectively, the start of the electric actuator 71 can drive the contact wheel 8 to move closer to the outside of the bellows 31 through the first drive component 74 and the driving component 79 until the contact wheel 8 contacts the outside of the bellows 31, and the first drive component 74 can synchronously drive the plurality of groups of contact wheels 8 to move synchronously during the rotation process, so as to achieve the clamping effect of the plurality of groups of contact wheels 8 on the bellows 31;

[0042] The start of the motor 72 directly drives the contact wheel 8 to rotate through the connection effect of the second driving component 75 and the driving component 79. The contact wheel 8 is now in contact with the outside of the bellows 31. Under the action of the contact force, the rotation of the contact wheel 8 can drive the entire bellows 31 to rotate, so as to change the docking position with the laser welding component 2 and realize the arc continuous welding operation.

[0043] A clamping mechanism 6 is provided at the bottom of the laser welding assembly 2. When the laser welding assembly 2 contacts the guide tube 32 downward, the continuous downward effect will drive the clamping mechanism 6 to squeeze the guide tube 32, so that the guide tube 32 can effectively maintain the interference and docking effect with the bellows 31, thereby ensuring the actual welding quality.

[0044] refer to Figure 2 , Figure 4 , Figure 5 and Figure 8 The output end of the electric actuator 71 is fixed with a rod 73, one end of the rod 73 is elastically connected to the boss 5 through a return spring 77, and one side of the rod 73 is meshed with the first driving assembly 74. The first driving assembly 74 includes a first ring 741, eight groups of inner meshing grooves 742 and a single group of docking meshing grooves 743, the docking meshing grooves 743 are fixed on the outer ring surface of the first ring 741, and the first ring 741 is meshed with the rod 73 through the docking meshing grooves 743, and a plurality of groups of inner meshing grooves 742 are fixed in an annular array on the inner ring surface of the first ring 741, and the first ring 741 is meshed with the driving teeth 796 through the inner meshing grooves 742.

[0045] In this embodiment, after being started, the electric actuator 71 directly drives the meshing rod 73 to move laterally inside the boss 5, and one side of the meshing rod 73 engages with the docking groove 743 and the meshing rod 73. When the meshing rod 73 moves, the first ring 741 as a whole will rotate in meshing due to the restriction of the support assembly 78, so that the inner groove 742 of the inner ring of the first ring 741 can mesh with the driving teeth 796, driving the driving assembly 79 to swing, thereby driving the contact wheel 8 to contact and fit with the surface of the bellows 31. Conversely, under the elastic resistance force of the reset spring 77, the contact wheel 8 can also achieve a separation and reset operation with the bellows 31.

[0046] refer to Figure 4 and Figure 7 The driving assembly 79 includes a swing rod 791 and two sets of mutually meshing transmission teeth 793. The two sets of transmission teeth 793 are mutually meshed and rotatably arranged at the bottom of the swing rod 791. One side of the single set of transmission teeth 793 is meshed with the final teeth 792. The top of the final teeth 792 is fixed to the abutment wheel 8 through a coupling shaft penetrating the swing rod 791. One side of the single set of transmission teeth 793 is meshed with the primary teeth 794. The top of the primary teeth 794 rotates in the movable notch 795 through a limit bearing. The movable notch 795 is provided at one side of the bottom of the swing rod 791. The top of one side of the swing rod 791 is fixed with the driving teeth 796. One side of the top of the swing rod 791 is rotationally limited by the coupling shaft and the boss 5. The axis of the coupling shaft on the surface of the swing rod 791 coincides with the primary teeth 794 and the driving teeth 796.

[0047] In the present embodiment, the driving teeth 796 are fixed at the top of one side of the swing rod 791, and the axis of this position is movable with the boss 5, so that when the driving teeth 796 is driven by the inner groove 742, the swing rod 791 rotates as a whole, thereby driving the contact wheel 8 to change its position, and the bottom of the contact wheel 8 passes through the swing rod 791 through the connecting shaft and is fixed to the final teeth 792, one side of the final teeth 792 is meshed with the transmission teeth 793, and the other side of the transmission teeth 793 is meshed with the primary teeth 794, and the primary teeth 794 here are movable at the bottom of the swing rod 791 through the movable groove 795, and its rotation will not drive the swing rod 791 to move, but directly drive the contact wheel 8 to rotate through the meshing effect of the transmission teeth 793 and the final teeth 792.

[0048] refer to Figure 2 , Figure 4 , Figure 5 and Figure 8 The second driving assembly 75 includes a second ring 751, a continuous vortex groove 752 and a continuous inner groove 753. The continuous vortex groove 752 and the continuous inner groove 753 are respectively arranged on the inner ring and the outer ring of the second ring 751. The second ring 751 is engaged with the vortex rod 76 on the output shaft of the motor 72 through the continuous vortex groove 752, and the second ring 751 is engaged with the primary gear 794 through the continuous inner groove 753.

[0049] In this embodiment, the continuous vortex groove 752 on the outer ring of the second ring 751 directly engages with the vortex rod 76 on the output shaft of the motor 72. When the motor 72 is started, the rotation of the vortex rod 76 will directly drive the second ring 751 to rotate. At this time, the continuous inner groove 753 at the inner ring position of the second ring 751 will also rotate synchronously, and the continuous inner groove 753 will directly engage with the primary gear 794, thereby driving the friction wheel 8 to rotate.

[0050] refer to Figure 2 and Figure 6 A support assembly 78 is provided between the first driving assembly 74 and the second driving assembly 75. The support assembly 78 includes a partition plate 781, two groups of annular grooves 782 and a plurality of groups of supporting balls 783. The two groups of annular grooves 782 are respectively provided on the upper and lower sides of the partition plate 781. Annular grooves are provided on the upper and lower sides of the second ring 751 and the first ring 741 near the annular grooves 782. A plurality of groups of supporting balls 783 are rollingly arranged in the annular grooves 782. The first ring 741 and the second ring 751 are respectively connected to the partition plate 781 through the limited rotation between the supporting balls 783.

[0051] In this embodiment, the first drive assembly 74 and the second drive assembly 75 are provided with a bellows 31 and a guide tube 32 at the inner circle position, so the rotation of the first drive assembly 74 and the second drive assembly 75 needs to be stabilized by the support of the support assembly 78;

[0052] The partition plate 781 is directly located between the first ring ring 741 and the second ring ring 751, and an annular groove 782 is provided on its surface. The groove shape of the annular groove 782 is consistent with the path of the first ring ring 741 and the second ring ring 751, and a supporting ball 783 is also provided therein. In this way, the supporting ball 783 existing between the first ring ring 741 and the second ring ring 751 and the annular groove 782 can provide better stability and limiting capabilities, thereby preventing the first ring ring 741 and the second ring ring 751 from deflecting and shifting during rotation.

[0053] refer to Figure 3 The clamping mechanism 6 includes two sets of side ear rods 61 and a connecting rod 62. The connecting rod 62 slides up and down in the side ear rod 61. A pressure spring 63 is also provided between the side ear rod 61 and the connecting rod 62. The connecting rod 62 is elastically connected to the side ear rod 61 through the pressure spring 63. An adjusting bolt 64 is transversely threadedly connected to the bottom of the connecting rod 62. A pressure wheel 65 is provided at one end of the adjusting bolt 64 for limited rotation. The side ear rod 61 is fixed to the side of the laser welding assembly 2. The pressure wheel 65 contacts and docks with the top surface of the bellows 31.

[0054] In this embodiment, when the laser welding assembly 2 is driven to move downward, the pressure wheel 65 in the clamping mechanism 6 will first contact the surface of the guide tube 32. At this time, the continuous downward effect will drive the connecting rod 62 to slide on the surface of the side ear rod 61 and squeeze the pressure spring 63 at the same time. At this time, the pressure wheel 65 connected to the bottom of the connecting rod 62 by the adjusting bolt 64 will provide a better resistance force to the guide tube 32, thereby preventing the bellows 31 and the guide tube 32 from detaching until the laser welding assembly 2 is aligned with the gap between the bellows 31 and the guide tube 32.

[0055] Working principle: First, the bellows 31 and the guide tube 32 are placed on the lifting platform 4, and the lifting platform 4 is used to adjust the height. Then, the electric actuator 71 in the transmission mechanism 7 on the inner side of the boss 5 is driven first, and the electric actuator 71 drives the sleeve meshing rod 73 to move horizontally while squeezing the reset spring 77 and driving the first ring 741 to rotate on the inner ring of the boss 5 through the docking meshing groove 743, so that the inner meshing groove 742 at the inner ring position of the first ring 741 meshes with the driving meshing tooth 796 at the top of the swing rod 791, thereby realizing the swing rod 791 driving the collision The wheel 8 is aligned with the outside of the bellows 31, and then the motor 72 is started. The motor 72 directly drives the vortex rod 76 to rotate, and the continuous vortex groove 752 is forced to realize the overall rotation of the second ring 751. The continuous inner groove 753 and the primary gear 794 are meshed with each other, so that it rotates in the movable notch 795 at the bottom of the swing rod 791. At this time, the primary gear 794 directly drives the final gear 792 to rotate through the transmission gear 793, and the final gear 792 is fixed at the bottom of the contact wheel 8, so that the contact wheel 8 rotates at this time, thereby driving the bellows 31 to rotate;

[0056] Prior to this, the laser welding assembly 2 is driven to move downward on the top of the welding table 1, so that the pressure wheel 65 in the clamping mechanism 6 first fits with the top of the guide tube 32 inside the bellows 31, and then the laser welding assembly 2 continues to descend, and the connecting rod 62 receives pressure and slides in the side ear rod 61 and squeezes the pressure spring 63. At this time, the pressure wheel 65 on the side of the adjusting bolt 64 provides a good downward pressure on the guide tube 32, thereby stabilizing the bellows 31 and the guide tube 32;

[0057] Finally, the rotation of the first ring 741 and the second ring 751 is restricted by the support assembly 78. A support ball 783 is provided in the ring groove 782 opened on the surface of the partition plate 781. The support ball 783 limits the first ring 741 and the second ring 751, thereby preventing the first ring 741 and the second ring 751 from rotating and deviating.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A laser welding protection device for corrugated pipe production, characterized in that: The invention comprises a welding platform (1) and a laser welding assembly (2), wherein the laser welding assembly (2) moves on the top of the welding platform (1) via a transmission beam, a welding workpiece (3) is mounted inside the welding platform (1) via a lifting platform (4), the welding workpiece (3) comprises a guide tube (32) sleeved inside a corrugated tube (31), a boss (5) is fixed on the top surface of the welding platform (1), and a docking transmission mechanism (7) is arranged inside the boss (5); The docking transmission mechanism (7) comprises an electric actuator (71) and a motor (72). When the electric actuator (71) is started, it can drive eight groups of contact wheels (8) to contact and dock with the outer surface of the bellows (31) through a first driving component (74) and a driving component (79). When the motor (72) is started, it can drive the eight groups of contact wheels (8) to rotate on the surface of the bellows (31) through a second driving component (75) and a driving component (79). A clamping mechanism (6) is provided on both sides of the bottom of the laser welding assembly (2). The laser welding assembly (2) contacts the guide tube (32) inside the bellows (31) through an adjusting bolt (64) in the clamping mechanism (6), and the adjusting bolt (64) and the bellows (31) are in active contact with each other.

2. A laser welding protection device for corrugated pipe production according to claim 1, characterized in that: The output end of the electric actuator (71) is fixed with a meshing rod (73), one end of which is elastically connected to the boss (5) via a return spring (77), and one side of the meshing rod (73) is meshed with the first driving assembly (74).

3. A laser welding protection device for corrugated pipe production according to claim 2, characterized in that: The first driving component (74) includes a first ring (741), eight groups of internal meshing grooves (742) and a single group of docking meshing grooves (743); the docking meshing grooves (743) are fixed on the outer ring surface of the first ring (741); the first ring (741) and the meshing rod (73) are meshed with each other through the docking meshing grooves (743); a plurality of groups of internal meshing grooves (742) are fixed in an annular array on the inner ring surface of the first ring (741); the first ring (741) is meshed with the driving meshing teeth (796) through the internal meshing grooves (742).

4. A laser welding protection device for corrugated pipe production according to claim 1, characterized in that: The driving assembly (79) comprises a swing rod (791) and two groups of mutually meshing transmission teeth (793). The two groups of transmission teeth (793) are mutually meshing and rotatably arranged at the bottom of the swing rod (791). One side of the single group of transmission teeth (793) is meshed with the final teeth (792). The top of the final teeth (792) is fixed to the contact wheel (8) through a connecting shaft penetrating the swing rod (791). One side of the single group of transmission teeth (793) is meshed with the primary teeth (794). The top of the primary teeth (794) is rotated in a movable notch (795) through a limit bearing. The movable notch (795) is opened on one side of the bottom of the swing rod (791). The top of one side of the swing rod (791) is fixed with the driving teeth (796).

5. A laser welding protection device for corrugated pipe production according to claim 4, characterized in that: One side of the top of the swing rod (791) is rotationally limited by a connecting shaft and a boss (5), and the axis of the connecting shaft on the surface of the swing rod (791) coincides with the primary meshing teeth (794) and the driving meshing teeth (796).

6. The laser welding protection device for corrugated pipe production according to claim 1 is characterized in that: The second driving component (75) comprises a second ring (751), a continuous vortex groove (752) and a continuous inner groove (753); the continuous vortex groove (752) and the continuous inner groove (753) are respectively arranged on the inner ring and the outer ring of the second ring (751); the second ring (751) is meshed with the vortex rod (76) on the output shaft of the motor (72) through the continuous vortex groove (752); and the second ring (751) is meshed with the primary meshing teeth (794) through the continuous inner groove (753).

7. The laser welding protection device for corrugated pipe production according to claim 1 is characterized in that: A support assembly (78) is provided between the first drive assembly (74) and the second drive assembly (75), and the support assembly (78) comprises a partition plate (781), two groups of annular grooves (782) and a plurality of groups of supporting balls (783), the two groups of annular grooves (782) are respectively provided on the upper and lower sides of the partition plate (781), and annular grooves are provided on the upper and lower sides of the second ring (751) and the first ring (741) near the annular grooves (782).

8. A laser welding protection device for corrugated pipe production according to claim 7, characterized in that: A plurality of groups of supporting balls (783) are rollingly arranged in the annular groove (782), and the first annular ring (741) and the second annular ring (751) are respectively connected to the partition plate (781) in a limited rotation manner through the supporting balls (783).

9. The laser welding protection device for corrugated pipe production according to claim 1, characterized in that: The clamping mechanism (6) comprises two groups of side ear rods (61) and a connecting rod (62). The connecting rod (62) slides up and down inside the side ear rod (61). A pressure spring (63) is also provided between the side ear rod (61) and the connecting rod (62).

10. A laser welding protection device for corrugated pipe production according to claim 9, characterized in that: The connecting rod (62) is elastically connected to the side ear rod (61) via a pressure spring (63); an adjusting bolt (64) is transversely threadedly connected to the bottom of the connecting rod (62); a pressure wheel (65) is provided at one end of the adjusting bolt (64) for limited rotation; the side ear rod (61) is fixed to the side of the laser welding assembly (2); and the pressure wheel (65) is in contact with the top surface of the bellows (31).

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