A water cooling device for laser welding of pipes

Abstract

The present invention discloses a water-cooling device for laser welding of pipes, comprising a laser welding gun main body, a circular mounting groove being provided at the lower end of the laser welding gun main body, a concave groove being provided at the inner side wall of the circular mounting groove, a shrinkage groove being provided at the inner side of the concave groove, a circular groove being provided through the inner side of the shrinkage groove and extending outwardly through the inner side of the shrinkage groove, a connecting sleeve being inserted into the circular mounting groove, a convex docking portion being provided at the outer side of the connecting sleeve, the convex docking portion being clamped with the concave groove, and a water-cooling mechanism being installed at the inner side of the connecting sleeve. The beneficial effect of the present invention is that the gun head is inserted into the connecting sleeve and the water-cooling mechanism, the gun head and the connecting sleeve are fixedly connected by a bolt, and then the connecting sleeve is inserted into the circular mounting groove, so that the convex docking portion is inserted upward along the concave groove until the upper end of the convex docking portion abuts against the upper end of the concave groove. At this time, under the elastic force of the spring piece, the pressure plate drives the locking tooth plate to clamp with the connecting tooth plate.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding, in particular to a pipe laser welding water cooling device. Background Art

[0002] Laser welding uses a focused laser beam as an energy source, generating heat that strikes the workpiece. The optical properties of lasers, such as refraction and focusing, make laser welding ideal for welding micro-parts and difficult-to-reach areas. Laser welding also offers low heat input, minimal weld distortion, and immunity to electromagnetic fields. Laser welding equipment is used in some pipe manufacturing processes.

[0003] During laser welding, a high-energy laser beam is focused on a tiny area. Even if the gun tip does not directly contact the molten pool, it will still absorb some of the reflected and scattered laser energy or the heat radiated by the metal vapor, causing the temperature of the gun tip to be high. Therefore, if laser welding is performed for a long time, the gun tip needs to be cooled. Otherwise, it is easy to cause the optical components in the gun tip to not work properly. In the existing laser welding process, water cooling is mostly used for cooling. However, the existing water-cooling cooling device has a poor cooling effect when cooling the gun tip and cannot effectively guarantee the heat dissipation of the gun tip. In addition, the water-cooling device needs to regularly check whether the pipes in the cooling system are blocked or leaking to ensure the heat dissipation efficiency. In particular, the pipes installed near the gun tip need to be regularly disassembled and inspected. However, the existing water-cooling pipes installed near the gun tip are relatively cumbersome to disassemble and install, which is not conducive to subsequent inspections. It not only increases the burden on the staff, but also has low efficiency, affecting the normal use of the laser welding equipment. Summary of the Invention

[0004] The object of the present invention is to provide a water cooling device for laser welding of pipes to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a water-cooling device for laser welding of pipes, comprising a laser welding gun body, a circular mounting groove being formed at the lower end of the laser welding gun body, a concave groove being formed at the inner side wall of the circular mounting groove, a contraction groove being formed at the inner side of the concave groove, a circular groove being formed through the inner side of the contraction groove and extending outward, a connecting sleeve being inserted into the circular mounting groove, a protruding docking portion being provided at the outer side of the connecting sleeve, the protruding docking portion being engaged with the concave groove, a water-cooling mechanism being installed at the inner side of the connecting sleeve, a gun head body being inserted through the inner side of the water-cooling mechanism, the upper end of the gun head body being connected to the connecting sleeve by bolts, and a locking mechanism for locking the connecting sleeve being installed in the contraction groove;

[0006] Connecting mechanisms are respectively installed at both ends of the water-cooling mechanism, a locking mechanism is fixedly installed on the outside of the laser welding gun body, and docking mechanisms are symmetrically installed on the sides of the locking mechanism. The two docking mechanisms are respectively docked with the two connecting mechanisms, and one end of the docking mechanism at the bottom is connected to the water outlet pipe through a pipe joint, and one end of the docking mechanism at the top is connected to the water inlet pipe through a pipe joint.

[0007] Preferably, the connecting sleeve is formed by splicing two symmetrical shells, and the side surfaces of the raised docking portion are symmetrically provided with installation cavities;

[0008] The water cooling mechanism includes a spiral heat conduction plate clamped on the inner side of the connecting sleeve, two spiral water pipes are fixedly installed on the inner side of the spiral heat conduction plate, and a spiral guide plate is fixedly installed in the inner cavity of the spiral water pipe. The two ends of the spiral water pipe extend into two installation cavities respectively, and the two connecting mechanisms are respectively installed in the two installation cavities.

[0009] Preferably, the connection mechanism includes a junction box installed in the installation cavity, one end of the spiral water pipe passes through the side of the junction box and extends to the inner cavity thereof, a docking joint is inserted through the side of the junction box away from the spiral water pipe, the docking joint is fixedly and sealedly connected to the junction box, and an annular contraction cavity is formed on the inner side wall of the docking joint;

[0010] A positioning groove is provided on the side of the raised docking portion between the two installation cavities, and circular cavities are symmetrically provided at the upper and lower ends of the positioning groove. Air sealing mechanisms are symmetrically installed in the positioning groove. Both air sealing mechanisms are driven by a locking mechanism, and one end of the air sealing mechanism is set in the inner cavity of the docking joint.

[0011] Preferably, the side surface of the raised docking portion is symmetrically provided with concave mounting grooves, and connecting tooth plates are fixedly installed in the two concave mounting grooves. The locking mechanism includes a sleeve slidably inserted in the circular groove, one end of the sleeve passes through the circular groove and extends into the contraction groove, and the end of the sleeve outside the contraction groove is fixedly sleeved with an adjustment sleeve, and the end of the sleeve in the contraction groove is fixedly connected to a pressure plate, and the side of the pressure plate away from the sleeve is symmetrically fixedly connected with a locking tooth plate, and the locking tooth plate is clamped with the connecting tooth plate, and a plurality of spring plates are symmetrically installed on one side of the pressure plate, and the two sides of the spring plates are respectively abutted against the contraction groove and the pressure plate, and a rectangular groove is provided on the side surface of the pressure plate, and one end of the sleeve is sleeved on the outside of the rectangular groove, and the locking mechanism is used to lock the pressure plate.

[0012] Preferably, the locking mechanism includes a concave frame fixedly mounted on the outside of the laser welding gun body, an adjusting bolt is threadedly mounted on the side of the concave frame, one end of the adjusting bolt passes through the concave frame and extends to the inside thereof, and the end of the adjusting bolt located inside the concave frame is rotatably mounted on a transmission plate via a pin shaft;

[0013] A protective tube is inserted and symmetrically passed through the side of the transmission plate close to the laser welding gun body. A positioning ring is fixedly installed in the inner cavity of the protective tube. A guide groove is provided on the inner side of the positioning ring. The docking mechanism is installed in the protective tube. A circular through groove is symmetrically provided on the outer side of the laser welding gun body. The two protective tubes are respectively slidably connected to adjacent circular through grooves.

[0014] A stop block is fixedly connected between the two protective tubes on the side of the transmission plate close to the laser welding gun body, and one end of the stop block extends into the sleeve. An extrusion head is fixedly connected to the end of the stop block away from the transmission plate, and one end of the extrusion head passes through the rectangular groove, and the extrusion head is slidably connected to the rectangular groove.

[0015] Preferably, the upper and lower ends of the transmission plate are in sliding contact with the upper and lower inner side walls of the concave frame respectively, and the two circular through grooves are both connected to the concave groove.

[0016] Preferably, the docking mechanism includes a docking water pipe that is inserted into the positioning ring, an annular groove is provided at one end of the docking water pipe, a guide plate is fixedly connected to the docking water pipe, the docking water pipe is slidably connected to the positioning ring, the guide plate is slidably connected to the guide groove, and a limiting ring, a sealing ring and a buffer spring are sleeved on one side of the docking water pipe, wherein the limiting ring is fixedly sleeved on the end of the docking water pipe away from the annular groove, and the sealing ring is fixedly sleeved on the end with the annular groove, and the two ends of the buffer spring are respectively in contact with the sealing ring and the positioning ring.

[0017] Preferably, the air-sealing mechanism includes a piston cylinder installed in a circular cavity, a fixed cover fixedly installed at the end of the piston cylinder, a piston rod slidably inserted into the side of the fixed cover, one end of the piston rod passes through the fixed cover and extends to the inner cavity of the piston cylinder, a piston head is fixedly installed at the end of the piston rod in the inner cavity of the piston cylinder, a return spring is sleeved at the end of the piston rod outside the inner cavity of the piston cylinder, and the end of the piston rod away from the piston head is fixedly connected to the driving head;

[0018] The air outlet end of the piston cylinder is fixedly sleeved with a vent tube, one end of the vent tube extends into the installation cavity, and one end of the vent tube passes through the docking joint and extends into the annular contraction cavity. An annular airbag is installed in the annular contraction cavity, and one end of the vent tube is fixedly inserted into the side of the annular airbag.

[0019] Preferably, both ends of the return spring abut against the fixed cover and the driving head respectively, and the inner cavity of the vent tube is connected with the inner cavity of the annular airbag.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. Insert the gun head into the connecting sleeve and the water-cooling mechanism, fix the gun head and the connecting sleeve with bolts, and then insert the connecting sleeve into the circular mounting groove, so that the raised docking part is inserted upward along the concave groove until the upper end of the raised docking part abuts against the upper end of the concave groove. At this time, under the elastic force of the shrapnel, the pressure plate drives the locking tooth plate to engage with the connecting tooth plate, thereby locking the connecting tooth plate, and then completing the locking of the connecting sleeve and the gun head, so that the gun head and the laser welding gun body are relatively fixed. The provided locking mechanism can conveniently disassemble and install the gun head and the connecting sleeve.

[0022] 2. By screwing the adjusting bolt inward along the concave frame, the protective tube drives the docking mechanism to move close to the connecting mechanism, so that the docking water pipe and the docking joint are plugged into each other, and the annular airbag is expanded. The inner side of the expanded annular airbag is engaged with the annular groove, and the annular airbag is provided to further seal the docking joint and the docking water pipe.

[0023] 3. The pressure plate is abutted by the abutment block in the locking mechanism to prevent the pressure plate from shaking during operation, causing the locking tooth plate and the connecting tooth plate to loosen, preventing the connecting sleeve and the gun head from loosening, and ensuring a stable connection between the connecting sleeve, the gun head and the laser welding gun body.

[0024] 4. Through the cooperation of the locking mechanism, locking mechanism, docking mechanism and air sealing mechanism, the gun head can be easily disassembled and installed, which greatly improves the work efficiency. The air sealing mechanism and sealing ring greatly improve the sealing between the docking joint and the docking water pipe, thereby making the sealing between the water cooling pipeline and the external pipeline good and preventing leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural perspective diagram of the water cooling device for laser welding of pipes according to the present invention;

[0026] Figure 2 This is a cross-sectional view of the structure of the water-cooling device for laser welding of pipes according to the present invention;

[0027] Figure 3 This is an exploded view of the structure of the pipe laser welding water cooling device of the present invention;

[0028] Figure 4 This is a side sectional view of the local structure of the water cooling device for laser welding of pipes according to the present invention;

[0029] Figure 5 for Figure 4 A schematic diagram of the structure at center A;

[0030] Figure 6 for Figure 4 A magnified schematic diagram of the structure at point B in the middle;

[0031] Figure 7This is a side sectional view of the water cooling mechanism of the present invention;

[0032] Figure 8 This is an exploded view of the connecting sleeve, water cooling mechanism, connecting mechanism and locking mechanism of the present invention;

[0033] Figure 9 It is an exploded view of the connection mechanism, locking mechanism, docking mechanism and airtight mechanism of the present invention.

[0034] Figure: 1. Laser welding gun body; 11. Circular mounting groove; 12. Concave groove; 13. Contraction groove; 14. Circular groove; 15. Circular through groove; 2. Connecting sleeve; 21. Protruding docking portion; 22. Mounting cavity; 23. Concave mounting groove; 24. Connecting tooth plate; 25. Positioning groove; 26. Circular cavity; 3. Spiral heat conduction plate; 31. Spiral water pipe; 32. Spiral flow guide plate; 33. Gun head body; 4. Junction box; 41. Butt joint; 42. Annular contraction cavity; 5. Sleeve; 51. Adjusting sleeve; 52. Pressing plate; 53. Locking tooth plate ; 54. Spring piece; 55. Rectangular groove; 6. Concave frame; 61. Adjusting bolt; 62. Transmission plate; 63. Protective tube; 64. Positioning ring; 65. Guide groove; 7. Docking water pipe; 71. Annular groove; 72. Guide plate; 73. Limiting ring; 74. Sealing ring; 75. Buffer spring; 76. Water outlet pipe; 77. Water inlet pipe; 8. Piston cylinder; 81. Fixed cover; 82. Piston rod; 83. Piston head; 84. Return spring; 85. Drive head; 86. Vent pipe; 87. Annular air bag; 9. Stop block; 91. Extrusion head. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1 to 9The present invention provides a technical solution: a water-cooling device for laser welding of pipes, comprising a laser welding gun body 1, a circular mounting groove 11 being provided at the lower end of the laser welding gun body 1, a concave groove 12 being provided on the inner side wall of the circular mounting groove 11, a shrinkage groove 13 being provided on the inner side of the concave groove 12, a circular groove 14 being provided through the inner side of the shrinkage groove 13 and extending outward, a connecting sleeve 2 being inserted into the circular mounting groove 11, a protruding docking portion 21 being provided on the outer side of the connecting sleeve 2, the protruding docking portion 21 being engaged with the concave groove 12, a water-cooling mechanism being installed on the inner side of the connecting sleeve 2, a gun head body 33 being inserted through the inner side of the water-cooling mechanism, the upper end of the gun head body 33 being connected to the connecting sleeve 2 by bolts, and a locking mechanism for locking the connecting sleeve 2 being installed in the shrinkage groove 13;

[0037] Connecting mechanisms are respectively installed at both ends of the water-cooling mechanism, a locking mechanism is fixedly installed on the outside of the laser welding gun body 1, and docking mechanisms are symmetrically installed on the sides of the locking mechanism. The two docking mechanisms are docked with the two connecting mechanisms respectively, and one end of the docking mechanism at the bottom is connected to the water outlet pipe 76 through a pipe joint, and one end of the docking mechanism at the top is connected to the water inlet pipe 77 through a pipe joint.

[0038] One end of the water inlet pipe 77 is connected to the water outlet of the water pump. The water pump delivers the coolant into the water inlet pipe 77. The coolant flows along the water inlet pipe 77 into the docking mechanism, and then flows along the docking mechanism and the connecting mechanism into the water cooling mechanism. The coolant flows along the water cooling mechanism to cool the gun head body 33. The coolant absorbs the heat emitted by the gun head body 33, thereby completing the cooling.

[0039] The coolant flows in from the upper end of the water cooling mechanism and flows out from the lower end, and finally flows into the water outlet pipe 76 along the connecting mechanism and docking mechanism below. One end of the water outlet pipe 76 is connected to the liquid storage tank. The coolant that has absorbed the heat flows along the water outlet pipe 76 into the liquid storage tank. The coolant returning to the liquid storage tank is cooled again by the refrigeration equipment, thereby realizing recycling.

[0040] See also Figure 4 、 Figure 7 and Figure 8 The connecting sleeve 2 is formed by splicing two symmetrical shells, which are connected by bolts or other detachable means such as snap-fitting. The side of the raised docking portion 21 is symmetrically provided with mounting cavities 22;

[0041] The water cooling mechanism includes a spiral heat conducting plate 3 which is clamped on the inner side of the connecting sleeve 2. Two spiral water pipes 31 are fixedly installed on the inner side of the spiral heat conducting plate 3. A spiral guide plate 32 is fixedly installed in the inner cavity of the spiral water pipe 31. The two ends of the spiral water pipe 31 extend into the two installation cavities 22 respectively. The two connecting mechanisms are respectively installed in the two installation cavities 22.

[0042] The coolant enters from the upper end of the spiral water pipe 31, flows downward in a spiral along the spiral water pipe 31, and finally flows out from the lower end of the spiral water pipe 31. At this time, the spiral heat conducting plate 3 conducts heat to the gun head body 33, and the heat is absorbed by the coolant, thereby achieving cooling of the gun head body 33.

[0043] By setting up the spiral water pipe 31, the circulation time and path of the coolant in the spiral heat conduction plate 3 are increased, thereby improving the heat absorption efficiency; at the same time, when the coolant flows along the inner cavity of the spiral water pipe 31, the coolant also flows along the spiral guide plate 32, thereby allowing the coolant to be well mixed, preventing the coolant close to the inner wall of the spiral water pipe 31 from always being on the outside, while the coolant in the center of the spiral water pipe 31 is always on the inside. By setting up the spiral guide plate 32, the coolant in the spiral water pipe 31 is well mixed, so that the coolant can absorb heat well, thereby improving the cooling efficiency of the gun head body 33.

[0044] See also Figures 3 to 5 、 Figure 8 and Figure 9 The connection mechanism includes a junction box 4 installed in the installation cavity 22. One end of the spiral water pipe 31 passes through the side of the junction box 4 and extends into its inner cavity. A docking joint 41 is inserted through the side of the junction box 4 away from the spiral water pipe 31. The docking joint 41 is fixedly and sealedly connected to the junction box 4. An annular contraction cavity 42 is formed on the inner side wall of the docking joint 41.

[0045] A positioning groove 25 is provided on the side of the raised docking portion 21 between the two mounting cavities 22, and circular cavities 26 are symmetrically provided at the upper and lower ends of the positioning groove 25. An air sealing mechanism is symmetrically installed in the positioning groove 25, and both air sealing mechanisms are driven by a locking mechanism. One end of the air sealing mechanism is set in the inner cavity of the docking joint 41.

[0046] See also Figure 2 、 Figure 3 and Figure 8The cam 52 is fixedly mounted on the side of the cam 52 and is locked to the locking cam 53.

[0047] When the connecting sleeve 2 is inserted into the circular mounting groove 11, the protruding docking portion 21 is inserted upward along the concave groove 12. At this time, the protruding docking portion 21 pushes the locking tooth plate 53 to move into the contraction groove 13. At this time, the locking tooth plate 53 drives the pressing plate 52 to squeeze the spring piece 54.

[0048] When the connecting sleeve 2 is fully inserted into the circular mounting groove 11, the upper end of the convex docking portion 21 abuts against the upper end of the concave groove 12. At this time, under the action of the elastic force of the spring piece 54, the pressure plate 52 drives the locking tooth plate 53 to engage with the connecting tooth plate 24, thereby locking the connecting tooth plate 24, and then completing the locking of the connecting sleeve 2 and the gun head body 33, so that the gun head body 33 and the laser welding gun body 1 are relatively fixed.

[0049] When disassembly is required, the adjusting sleeve 51 is pulled outward, and the adjusting sleeve 51 drives the pressure plate 52 to move into the shrinkage groove 13 through the sleeve 5, and the pressure plate 52 drives the locking tooth plate 53 to move into the shrinkage groove 13, so that the locking tooth plate 53 releases the lock on the connecting tooth plate 24. At this time, the gun head body 33 and the connecting sleeve 2 can be removed from the laser welding gun body 1.

[0050] During the installation process, the adjusting sleeve 51 can also be pulled to shrink the locking tooth plate 53 into the shrinkage groove 13, and then the gun head body 33 and the connecting sleeve 2 are inserted into the laser welding gun body 1, and the adjusting sleeve 51 is loosened to lock the connecting sleeve 2.

[0051] The disassembly and assembly of the connecting sleeve 2 and the gun head body 33 are simple and convenient, which greatly improves the working efficiency.

[0052] See also Figures 1 to 4 、 Figure 9The locking mechanism includes a concave frame 6 fixedly mounted on the outside of the laser welding gun body 1. The concave frame 6 is arranged on the outside of the circular groove 14. An adjusting bolt 61 is threadedly mounted on the side of the concave frame 6. One end of the adjusting bolt 61 passes through the concave frame 6 and extends to the inside thereof. The end of the adjusting bolt 61 located on the inside of the concave frame 6 is rotatably mounted with a transmission plate 62 through a pin shaft.

[0053] A protective tube 63 is inserted and symmetrically penetrated on one side of the transmission plate 62 close to the laser welding gun body 1. A positioning ring 64 is fixedly installed in the inner cavity of the protective tube 63. A guide groove 65 is provided on the inner side of the positioning ring 64. The docking mechanism is installed in the protective tube 63. Circular through grooves 15 are symmetrically provided on the outer side of the laser welding gun body 1. The two protective tubes 63 are respectively slidably connected to adjacent circular through grooves 15. When the connecting sleeve 2 is installed in the laser welding gun body 1, the positions of the two circular through grooves 15 correspond to the two installation cavities 22 respectively.

[0054] A stop block 9 is fixedly connected between the two protective tubes 63 on the side of the transmission plate 62 close to the laser welding gun body 1. One end of the stop block 9 extends into the sleeve 5, and the stop block 9 does not contact the inner wall of the sleeve 5. When the locking mechanism locks the pressure plate 52, one end of the stop block 9 abuts against the pressure plate 52. The end of the stop block 9 away from the transmission plate 62 is fixedly connected to an extrusion head 91. One end of the extrusion head 91 passes through the rectangular groove 55, and the extrusion head 91 is slidably connected to the rectangular groove 55. One end of the extrusion head 91 is symmetrically provided with extrusion inclined surfaces.

[0055] The upper and lower ends of the transmission plate 62 are in sliding contact with the upper and lower inner side walls of the concave frame 6 respectively, and the two circular through grooves 15 are both connected to the concave groove 12.

[0056] By rotating the adjusting bolt 61, the adjusting bolt 61 moves inward or outward along the concave frame 6, so that the adjusting bolt 61 drives the transmission plate 62 to slide along the inner side of the concave frame 6, and at the same time, the transmission plate 62 moves closer to or away from the laser welding gun body 1, and the transmission plate 62 drives the protective tube 63 to slide along the circular through groove 15.

[0057] See also Figure 2 、 Figure 4 、 Figure 5 and Figure 9The docking mechanism includes a docking water pipe 7 that passes through and is inserted into the positioning ring 64. One end of the docking water pipe 7 is provided with an annular groove 71. A guide plate 72 is fixedly connected to the docking water pipe 7. The docking water pipe 7 is slidably connected to the positioning ring 64. The guide plate 72 is slidably connected to the guide groove 65. A limiting ring 73, a sealing ring 74 and a buffer spring 75 are sleeved on one side of the docking water pipe 7. The limiting ring 73 is fixedly sleeved on the end of the docking water pipe 7 away from the annular groove 71, and the sealing ring 74 is fixedly sleeved on the end with the annular groove 71. The two ends of the buffer spring 75 are respectively in contact with the sealing ring 74 and the positioning ring 64, and the buffer spring 75 applies elastic force to the sealing ring 74.

[0058] One end of the lower docking water pipe 7 is connected to a water outlet pipe 76 via a pipe joint, and one end of the upper docking water pipe 7 is connected to a water inlet pipe 77 via a pipe joint.

[0059] When the docking mechanism is docked with the connecting mechanism, one end of the docking water pipe 7 with the annular groove 71 is inserted into the inner side of the docking joint 41, and the outer side of the docking water pipe 7 contacts the inner wall of the docking joint 41. Under the action of the elastic force of the buffer spring 75, the sealing ring 74 is firmly abutted against the end of the docking joint 41, thereby making the docking water pipe 7 and the docking joint 41 sealed. At the same time, the annular groove 71 is aligned with the annular contraction cavity 42, that is, the annular contraction cavity 42 is on the outside of the annular groove 71.

[0060] The docking process of the docking mechanism and the connecting mechanism is as follows: by rotating the adjusting bolt 61, the transmission plate 62 moves closer to the laser welding gun body 1, and the transmission plate 62 drives the protection tube 63 to be inserted into the circular through groove 15. At the same time, the protection tube 63 drives the docking mechanism to move into the laser welding gun body 1;

[0061] At this time, the end of the docking water pipe 7 with the annular groove 71 is first inserted into the inner side of the docking joint 41 until the sealing ring 74 abuts against the end of the docking joint 41. At this time, the docking water pipe 7 cannot move further, and the protective tube 63 continues to move into the laser welding gun body 1. At this time, the protective tube 63 drives the positioning ring 64 to slide along the docking water pipe 7. At the same time, the positioning ring 64 squeezes the buffer spring 75. Under the action of the elastic force of the buffer spring 75, the sealing ring 74 is firmly abutted against the end of the docking joint 41 to ensure sealing.

[0062] When the docking mechanism needs to be separated from the connecting mechanism, the adjusting bolt 61 is rotated in the opposite direction to move the transmission plate 62 away from the laser welding gun body 1, so that the protective tube 63 moves outward along the circular through groove 15 first. At this time, the positioning ring 64 slides along the docking water pipe 7 until the positioning ring 64 contacts the limiting ring 73 at one end of the docking water pipe 7. At this time, the positioning ring 64 pushes the limiting ring 73 to move synchronously, and the limiting ring 73 drives the docking water pipe 7 to move, thereby separating the docking water pipe 7 from the docking joint 41, completing the separation of the docking mechanism from the connecting mechanism.

[0063] See also Figure 4 、 Figure 6 and Figure 9 The airtight sealing mechanism includes a piston cylinder 8 installed in the circular cavity 26, a fixed cover 81 is fixedly installed on the end of the piston cylinder 8, a piston rod 82 is slidably inserted on the side of the fixed cover 81, one end of the piston rod 82 passes through the fixed cover 81 and extends to the inner cavity of the piston cylinder 8, a piston head 83 is fixedly installed on the end of the piston rod 82 in the inner cavity of the piston cylinder 8, the piston head 83 is slidably connected to the side wall of the inner cavity of the piston cylinder 8, a return spring 84 is sleeved on the end of the piston rod 82 outside the inner cavity of the piston cylinder 8, and a driving head 85 is fixedly connected to the end of the piston rod 82 away from the piston head 83;

[0064] The air outlet end of the piston cylinder 8 is fixedly sleeved with a vent tube 86, one end of the vent tube 86 extends into the installation cavity 22, and one end of the vent tube 86 passes through the docking joint 41 and extends into the annular contraction cavity 42. An annular airbag 87 is installed in the annular contraction cavity 42, and one end of the vent tube 86 is fixedly inserted into the side of the annular airbag 87.

[0065] The two ends of the return spring 84 are respectively in contact with the fixed cover 81 and the driving head 85, and the return spring 84 applies elastic force to the driving head 85. The inner cavity of the vent tube 86 is connected with the inner cavity of the annular airbag 87, and the vent tube 86 is connected with the inner cavity of the piston cylinder 8 through the air outlet end.

[0066] During the docking process between the docking mechanism and the connecting mechanism, one end of the docking water pipe 7 is first inserted into the inner side of the docking joint 41. During this process, the transmission plate 62 drives the stop block 9 and the extrusion head 91 to move synchronously, and the extrusion head 91 moves along the rectangular groove 55 into the positioning groove 25.

[0067] When the sealing ring 74 abuts against the end of the butt joint 41, the two extrusion inclined surfaces of the extrusion head 91 contact the two driving heads 85 respectively;

[0068] At this time, the transmission plate 62 continues to move closer to the laser welding gun body 1, and the transmission plate 62 continues to drive the extrusion head 91 to move into the positioning groove 25 through the stop block 9. At this time, the extrusion head 91 pushes the two driving heads 85 away from each other, and the driving head 85 pushes the piston rod 82 to insert into the inner cavity of the piston cylinder 8. The driving head 85 squeezes the return spring 84, and at the same time, the piston rod 82 drives the piston head 83 to slide along the inner cavity of the piston cylinder 8, and the piston head 83 moves closer to the gas outlet end;

[0069] The gas in the inner cavity of the piston cylinder 8 is squeezed out through the outlet end by the piston head 83, and the squeezed gas flows into the annular airbag 87 along the outlet end and the vent pipe 86, causing the annular airbag 87 to expand. The inner side of the expanded annular airbag 87 is engaged with the annular groove 71, and the annular airbag 87 is provided to further seal the docking joint 41 and the docking water pipe 7.

[0070] When one end of the stop block 9 contacts the pressure plate 52, the movement of the transmission plate 62 is stopped, that is, the rotation of the adjusting bolt 61 is stopped, and the pressure plate 52 is abutted by the stop block 9 to prevent the pressure plate 52 from shaking during operation, causing the locking tooth plate 53 and the connecting tooth plate 24 to loosen, preventing the connecting sleeve 2 and the gun head body 33 from loosening, and ensuring a stable connection between the connecting sleeve 2, the gun head body 33 and the laser welding gun body 1.

[0071] When the docking mechanism is separated from the connecting mechanism, the transmission plate 62 drives the extrusion head 91 away from the positioning groove 25 through the stop block 9. At the same time, the extrusion head 91 is separated from the driving head 85. Under the action of the elastic force of the return spring 84, the two driving heads 85 are moved closer to each other. The driving head 85 drives the piston rod 82 to move out of the inner cavity of the piston cylinder 8. At this time, the piston head 83 slides along the inner cavity of the piston cylinder 8 and moves away from the gas outlet end.

[0072] The gas is sucked into the inner cavity of the piston cylinder 8 through the piston head 83, so that the gas in the inner cavity of the annular airbag 87 flows into the inner cavity of the piston cylinder 8 along the vent pipe 86 and the gas outlet end, thereby causing the annular airbag 87 to shrink into the annular shrinkage cavity 42.

[0073] After the existing water-cooling pipeline installed on the side of the gun head body 33 is disassembled, it is also very inconvenient to disassemble it from the external pipeline, which increases the difficulty of disassembling and installing the water-cooling pipeline. After multiple disassemblies, it is easy to cause the sealing between the water-cooling pipeline and the external pipeline to decrease, resulting in coolant leakage.

[0074] By cooperating with the locking mechanism, docking mechanism and air sealing mechanism, the problem of disassembly of the water cooling pipeline can be well solved, and the disassembly and installation methods are simple and convenient, which greatly improves work efficiency. The air sealing mechanism and sealing ring 74 are greatly improved in the sealing between the docking joint 41 and the docking water pipe 7, thereby making the sealing between the water cooling pipeline and the external pipeline good, and no leakage will occur.

[0075] Working principle: When installing the gun head body 33, the connecting sleeve 2 is stuck on the outside of the water cooling mechanism, and at the same time, the connecting mechanism is stuck in the installation cavity 22, and the air sealing mechanism is stuck in the circular cavity 26, completing the preliminary assembly;

[0076] The water cooling mechanism, the connecting mechanism and the air sealing mechanism can all be connected to the connecting sleeve 2 by means of bolts, so as to facilitate the disassembly of the water cooling mechanism, the connecting mechanism and the air sealing mechanism.

[0077] Insert the gun head body 33 into the connecting sleeve 2 and the water cooling mechanism, and fix the gun head body 33 and the connecting sleeve 2 with bolts, then insert the connecting sleeve 2 into the circular mounting groove 11, and insert the protruding docking portion 21 upward along the concave groove 12 until the upper end of the protruding docking portion 21 abuts against the upper end of the concave groove 12. At this time, under the elastic force of the spring piece 54, the pressure plate 52 drives the locking tooth plate 53 to engage with the connecting tooth plate 24, thereby locking the connecting tooth plate 24, and then completing the locking of the connecting sleeve 2 and the gun head body 33, so that the gun head body 33 and the laser welding gun body 1 are relatively fixed.

[0078] The adjusting bolt 61 is screwed inward along the concave frame 6, so that the adjusting bolt 61 drives the transmission plate 62 to move close to the laser welding gun body 1, and the transmission plate 62 drives the protective tube 63 to be inserted into the circular through groove 15. At the same time, the transmission plate 62 drives the abutment 9 and the extrusion head 91 to move synchronously, so that the extrusion head 91 moves along the rectangular groove 55 into the positioning groove 25. The protective tube 63 drives the docking mechanism to move close to the connecting mechanism, so that the end of the docking water pipe 7 with the annular groove 71 is slowly inserted into the docking joint 41 until the sealing ring 74 abuts against the end of the docking joint 41. At this time, the docking water pipe 7 cannot move further, and at the same time, the two extrusion inclined surfaces of the extrusion head 91 are in contact with the two driving heads 85 respectively.

[0079] At this time, continue to screw in the adjusting bolt 61, so that the transmission plate 62 continues to move closer to the laser welding gun body 1, the transmission plate 62 continues to drive the docking mechanism to move through the protective tube 63, and the stop block 9 continues to drive the extrusion head 91 to move;

[0080] The positioning ring 64 slides along the docking water pipe 7 and at the same time squeezes the buffer spring 75. Under the elastic force of the buffer spring 75, the sealing ring 74 firmly contacts the end of the docking joint 41 to ensure sealing.

[0081] At the same time, the extrusion head 91 pushes the two driving heads 85 away from each other, and the driving head 85 pushes the piston rod 82 to insert into the inner cavity of the piston cylinder 8, and the gas in the inner cavity of the piston cylinder 8 is squeezed out through the air outlet end by the piston head 83. The squeezed gas flows into the annular airbag 87 along the air outlet end and the vent pipe 86, causing the annular airbag 87 to expand. The inner side of the expanded annular airbag 87 is engaged with the annular groove 71, and the annular airbag 87 is provided to further seal the docking joint 41 and the docking water pipe 7.

[0082] When one end of the stop block 9 contacts the pressure plate 52, the movement of the transmission plate 62 is stopped, that is, the rotation of the adjusting bolt 61 is stopped, and the pressure plate 52 is abutted by the stop block 9 to prevent the pressure plate 52 from shaking during operation, causing the locking tooth plate 53 and the connecting tooth plate 24 to loosen, preventing the connecting sleeve 2 and the gun head body 33 from loosening, and ensuring a stable connection between the connecting sleeve 2, the gun head body 33 and the laser welding gun body 1.

[0083] Thus, the installation of the gun head body 33 is completed, and the installation of the water cooling pipeline and the external pipeline is completed.

[0084] When the gun head body 33 needs to be disassembled, the adjusting bolt 61 is rotated in the reverse direction to move the transmission plate 62 away from the laser welding gun body 1. The transmission plate 62 drives the docking mechanism to reset, so that the docking water pipe 7 in the docking mechanism is separated from the docking joint 41.

[0085] At the same time, the transmission plate 62 drives the block 9 and the extrusion head 91 to reset, so that the block 9 releases the lock on the pressure plate 52, and at the same time separates the extrusion head 91 from the drive head 85. Under the action of the elastic force of the reset spring 84, the two drive heads 85 are moved closer to each other, and the gas is sucked into the inner cavity of the piston cylinder 8 through the piston head 83, so that the gas in the inner cavity of the annular airbag 87 flows into the inner cavity of the piston cylinder 8 along the vent pipe 86 and the air outlet end, thereby causing the annular airbag 87 to shrink into the annular contraction cavity 42.

[0086] By cooperating with the provided locking mechanism, locking mechanism, docking mechanism and air sealing mechanism, the gun head body 33 can be conveniently disassembled and installed, which greatly improves the working efficiency. The provided air sealing mechanism and sealing ring 74 greatly improve the sealing between the docking joint 41 and the docking water pipe 7, thereby making the sealing between the water cooling pipeline and the external pipeline good, and no leakage will occur.

[0087] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A water-cooling device for laser welding of pipes, comprising a laser welding gun body (1), characterized in that: The lower end of the laser welding gun body (1) is provided with a circular mounting groove (11), the inner side wall of the circular mounting groove (11) is provided with a concave groove (12), the inner side of the concave groove (12) is provided with a shrinkage groove (13), the inner side of the shrinkage groove (13) is provided with a circular groove (14) extending outward, a connecting sleeve (2) is inserted into the circular mounting groove (11), a convex docking portion (21) is provided on the outer side of the connecting sleeve (2), the convex docking portion (21) is engaged with the concave groove (12), a water cooling mechanism is installed on the inner side of the connecting sleeve (2), a gun head body (33) is inserted into the inner side of the water cooling mechanism, the upper end of the gun head body (33) is connected to the connecting sleeve (2) by bolts, and a locking mechanism for locking the connecting sleeve (2) is installed in the shrinkage groove (13); Connecting mechanisms are respectively installed at both ends of the water cooling mechanism, a locking mechanism is fixedly installed on the outer side of the laser welding gun body (1), and docking mechanisms are symmetrically installed on the sides of the locking mechanism. The two docking mechanisms are respectively docked with the two connecting mechanisms, wherein one end of the docking mechanism at the bottom is connected to the water outlet pipe (76) through a pipe joint, and one end of the docking mechanism at the top is connected to the water inlet pipe (77) through a pipe joint; The connecting sleeve (2) is formed by splicing two symmetrical shells, and the side surfaces of the raised docking portion (21) are symmetrically provided with mounting cavities (22). The water cooling mechanism comprises a spiral heat conducting plate (3) clamped on the inner side of the connecting sleeve (2), two spiral water pipes (31) are fixedly installed on the inner side of the spiral heat conducting plate (3), a spiral guide plate (32) is fixedly installed in the inner cavity of the spiral water pipe (31), two ends of the spiral water pipe (31) respectively extend into two installation cavities (22), and two connecting mechanisms are respectively installed in the two installation cavities (22); The connection mechanism includes a junction box (4) installed in the installation cavity (22), one end of the spiral water pipe (31) passes through the side of the junction box (4) and extends to the inner cavity thereof, a butt joint (41) is inserted through the side of the junction box (4) away from the spiral water pipe (31), the butt joint (41) is fixedly and sealedly connected to the junction box (4), and an annular contraction cavity (42) is provided on the inner side wall of the butt joint (41); A positioning groove (25) is provided on the side of the raised docking portion (21) between the two mounting cavities (22), and circular cavities (26) are symmetrically provided at the upper and lower ends of the positioning groove (25). An air sealing mechanism is symmetrically installed in the positioning groove (25), and both air sealing mechanisms are driven by a locking mechanism, and one end of the air sealing mechanism is arranged in the inner cavity of the docking joint (41); The side surface of the raised docking portion (21) is symmetrically provided with concave mounting grooves (23), and a connecting tooth plate (24) is fixedly installed in each of the two concave mounting grooves (23). The locking mechanism includes a sleeve (5) slidably inserted into the circular groove (14), one end of the sleeve (5) passes through the circular groove (14) and extends into the contraction groove (13), the end of the sleeve (5) outside the contraction groove (13) is fixedly sleeved with an adjustment sleeve (51), and the end of the sleeve (5) inside the contraction groove (13) is fixedly connected to a pressure plate ( 52), a locking tooth plate (53) is symmetrically fixedly connected to one side of the pressure plate (52) away from the sleeve (5), and the locking tooth plate (53) is clamped with the connecting tooth plate (24). A plurality of spring pieces (54) are symmetrically installed on one side of the pressure plate (52), and the two sides of the spring pieces (54) are respectively in contact with the shrinkage groove (13) and the pressure plate (52). A rectangular groove (55) is opened through the side of the pressure plate (52), and one end of the sleeve (5) is sleeved on the outside of the rectangular groove (55). The locking mechanism is used to lock the pressure plate (52); The airtight sealing mechanism includes a piston cylinder (8) installed in a circular cavity (26), a fixed cover (81) is fixedly installed at the end of the piston cylinder (8), a piston rod (82) is slidably inserted into the side of the fixed cover (81), one end of the piston rod (82) passes through the fixed cover (81) and extends to the inner cavity of the piston cylinder (8), a piston head (83) is fixedly installed at one end of the piston rod (82) in the inner cavity of the piston cylinder (8), a return spring (84) is sleeved at one end of the piston rod (82) outside the inner cavity of the piston cylinder (8), and a driving head (85) is fixedly connected to one end of the piston rod (82) away from the piston head (83); The outlet end of the piston cylinder (8) is fixedly sleeved with a vent pipe (86), one end of the vent pipe (86) extends into the installation cavity (22), and one end of the vent pipe (86) passes through the docking joint (41) and extends into the annular contraction cavity (42), an annular airbag (87) is installed in the annular contraction cavity (42), and one end of the vent pipe (86) is fixedly plugged into the side of the annular airbag (87).

2. The water cooling device for laser welding of pipes according to claim 1, characterized in that: The locking mechanism comprises a concave frame (6) fixedly mounted on the outside of the laser welding gun body (1), an adjusting bolt (61) being threadedly mounted on the side of the concave frame (6), one end of the adjusting bolt (61) passing through the concave frame (6) and extending to the inside thereof, and a transmission plate (62) being rotatably mounted on the end of the adjusting bolt (61) located on the inside of the concave frame (6) via a pin shaft; A protective tube (63) is inserted and symmetrically penetrated on one side of the transmission plate (62) close to the laser welding gun body (1), a positioning ring (64) is fixedly installed in the inner cavity of the protective tube (63), and a guide groove (65) is provided on the inner side of the positioning ring (64). The docking mechanism is installed in the protective tube (63), and a circular through groove (15) is symmetrically provided on the outer side surface of the laser welding gun body (1), and the two protective tubes (63) are respectively slidably connected to the adjacent circular through grooves (15); A stop block (9) is fixedly connected between two protective tubes (63) on one side of the transmission plate (62) close to the laser welding gun body (1), one end of the stop block (9) extends into the sleeve (5), and an extrusion head (91) is fixedly connected to one end of the stop block (9) away from the transmission plate (62), one end of the extrusion head (91) passes through the rectangular groove (55), and the extrusion head (91) is slidably connected to the rectangular groove (55).

3. The water cooling device for laser welding of pipes according to claim 2, characterized in that: The upper and lower ends of the transmission plate (62) are in sliding contact with the upper and lower inner side walls of the concave frame (6), respectively, and the two circular through grooves (15) are both connected to the concave groove (12).

4. The water cooling device for laser welding of pipes according to claim 2, characterized in that: The docking mechanism includes a docking water pipe (7) inserted into the positioning ring (64), one end of the docking water pipe (7) is provided with an annular groove (71), a guide plate (72) is fixedly connected to the docking water pipe (7), the docking water pipe (7) is slidably connected to the positioning ring (64), the guide plate (72) is slidably connected to the guide groove (65), and a limiting ring (73), a sealing ring (74) and a buffer spring (75) are sleeved on one side of the docking water pipe (7), wherein the limiting ring (73) is fixedly sleeved on one end of the docking water pipe (7) away from the annular groove (71), the sealing ring (74) is fixedly sleeved on one end of the docking water pipe (7) provided with the annular groove (71), and the two ends of the buffer spring (75) are respectively in contact with the sealing ring (74) and the positioning ring (64).

5. The water cooling device for laser welding of pipes according to claim 1, characterized in that: The two ends of the return spring (84) are respectively in contact with the fixed cover (81) and the driving head (85), and the inner cavity of the vent tube (86) is in communication with the inner cavity of the annular airbag (87).

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