Pre-refrigeration end heating cable connection section welding equipment and welding process thereof

Abstract

The invention relates to the technical field of cable welding equipment, in particular to pre-refrigeration end heating cable connection section welding equipment and a welding process thereof.The pre-refrigeration end heating cable connection section welding equipment comprises a supporting frame, a guide rod, a welding mechanism and a clamping mechanism, the supporting frame is fixed to an external machine tool, the guide rod is vertically fixed in the supporting frame, and the welding mechanism is slidably connected to the guide rod; the two clamping mechanisms are arranged at the upper end and the lower end of the supporting frame, mechanical surrounding welding is achieved through the arrangement of the welding mechanism, current, voltage and welding speed can be adjusted in real time when a cable is welded, local overheating or insufficient penetration caused by manual operation is avoided, and the defects of incomplete penetration, undercut and the like of a weld joint are reduced; and meanwhile, through a 360-degree surrounding type welding path, uniform distribution of heat input is achieved, phase change or looseness of a magnesium oxide insulating layer due to local high temperature is prevented, the consistency of welding seams is effectively improved, and it is ensured that the size and surface smoothness of the welding seams meet the standard through programmed parameter setting.

Description

Technical Field

[0001] The present application relates to the technical field of cable welding equipment, and in particular to a pre-cooling end heating cable connection section welding device and a welding process thereof. Background Art

[0002] Mineral insulated cable is a cable with a copper conductor core wrapped in a copper sheath and magnesium oxide powder as an inorganic insulating material to isolate the conductor and the sheath. The outermost layer can be selected as required with an appropriate protective sheath, commonly known as MICC or MI cable. There is a similar cable that uses metal instead of copper sheath to wrap the core and insulating material, called mineral insulated metal sheathed cable.

[0003] At present, when mineral insulated heating cables are laid, they must be connected through their mineral insulated cables and cold end lines. The cold end is the transition section connecting the heating cable and the transmission cable. Generally, wiring mineral insulated cables are used as cold end connecting lines. At the connection points, welding protective sleeves are required for insulation protection.

[0004] In the related technology, manual welding is mostly used during welding. However, manual welding has insufficient control accuracy over current, voltage and welding speed, which can easily lead to local overheating or insufficient penetration, causing defects such as incomplete weld penetration and undercut, reducing the mechanical strength of the joint. In addition, the weld quality fluctuates greatly. Differences in operator skills can easily cause weld size deviations (such as uneven height and width) and surface roughness, increase the risk of pores and slag inclusions, and affect sealing and pressure resistance. At the same time, high welding temperature can easily lead to sensitization of the stainless steel sheath or phase change of the magnesium oxide insulation layer, reducing the insulation performance of the cable. In addition, manual welding is slow, and there are many intermediate joints in the mineral cable (frequent welding is required for long-distance laying), which leads to extended construction period and increased labor costs. Summary of the invention

[0005] In order to solve the current problems of unstable heat input, large fluctuations in weld quality, high human error rate, low efficiency and increased costs during manual welding, the present application provides a pre-cooling end heating cable connection section welding device and a welding process thereof.

[0006] In the first aspect, the present application provides a pre-cooling end heating cable connection section welding device adopts the following technical solution: A pre-cooling end heating cable connection section welding device, comprising: A support frame, the support frame is fixed to an external machine tool, and a guide rod is vertically fixed inside the support frame; A welding mechanism, which is used to perform welding operations on the cable connection end, and the welding mechanism is slidably connected to the guide rod, and at least two groups are symmetrically arranged up and down, the welding mechanism comprises a base plate, a supporting ring, a linkage gear ring, a fixing ring, a first docking rod, a second docking rod and a welding gun, the base plate is slidably connected to the guide rod, the supporting ring is fixed to one side of the base plate, a mounting cavity is arranged inside the supporting ring, the linkage gear ring is coaxial and rotatably engaged in the mounting cavity, the fixing ring is fixed to the inner wall of the linkage gear ring, one end of the first docking rod and the second docking rod are rotatably connected to each other, the welding gun is arranged at the connecting end of the first docking rod and the second docking rod, and the other end of the first docking rod is rotatably connected to the fixing ring, and the other end of the second docking rod is slidably engaged with the fixing ring; The clamping mechanism is used to clamp the cable, and at least two groups of the clamping mechanism are symmetrically arranged above and below, and the two groups of the clamping mechanism are arranged at the upper and lower ends of the support frame.

[0007] By adopting the above technical solution and utilizing the setting of the welding mechanism, mechanical circumferential welding is realized, so that the cable can adjust the current, voltage and welding speed in real time when being welded, avoiding local overheating or insufficient penetration caused by manual operation, and reducing defects such as incomplete penetration and undercut of the weld. At the same time, through the 360° circumferential welding path, the heat input is evenly distributed, and the magnesium oxide insulation layer is prevented from phase change or loosening due to local high temperature, so that the consistency of the weld is effectively improved. Through the programmed parameter setting, the weld size and surface finish are ensured to meet the standards, and the risks of pores and slag inclusions are reduced. In addition, the efficiency of mechanical welding is greatly improved compared with manual welding, which is especially suitable for scenes with frequent joints of long-distance cables, significantly reducing the construction period and labor costs. The clamping mechanism is used to achieve a quick centering effect on the two sections of the cable, avoiding misalignment during welding, further reducing the welding error rate and improving the quality of the finished product.

[0008] Optionally, the welding mechanism also includes an adjustment groove and an adjustment screw, wherein the adjustment groove is arranged through the fixing ring and has an arc-shaped structure, the adjustment screw is arranged on the sliding connection end of the second docking rod and the fixing ring, and the adjustment screw is slidably engaged in the adjustment groove and locked by a nut.

[0009] By adopting the above technical solution, the sliding path of the second docking rod is limited by the adjusting groove, thereby achieving effective control of the moving distance of the welding gun, and the second docking rod can be quickly locked by adjusting the screw.

[0010] Optionally, the welding mechanism also includes a driven gear, a driven roller, a driving roller and a belt, the driven gear is rotatably connected in the mounting cavity of the supporting ring, and the driven gear is meshed with the linkage gear ring, the driven roller is coaxially fixed with the driven gear and is located outside the supporting ring, the driving roller is rotatably connected to the side of the outside of the supporting ring close to the driven roller, and the belt is arranged between the driven roller and the driving roller.

[0011] By adopting the above technical solution, the belt is used to make the driven roller rotate synchronously with the driving roller, thereby driving the driven gear to rotate. The driven gear enables the linkage gear ring to mesh and drive the welding gun to make a circular motion.

[0012] Optionally, the welding mechanism also includes a transmission rod and a first servo motor, the transmission rod is rotatably connected in the support frame, and the transmission rod is slidably connected at the axis of the active roller, the first servo motor is fixed on the top of the support frame, and the output shaft of the first servo motor is coaxially fixed with the transmission rod.

[0013] By adopting the above technical solution, the first servo motor is used to drive the transmission rod to rotate, and then the transmission rod is used to drive the active roller to rotate synchronously.

[0014] Optionally, the welding mechanism also includes a screw rod and a second servo motor, the screw rod is rotatably connected in the support frame, a screw hole is penetrated on the base plate, the screw rod is threadedly matched with the screw hole, and two groups of reverse threads are symmetrically arranged on the screw rod, the second servo motor is fixed on the top of the support frame, and the output shaft of the second servo motor is coaxially fixed with the screw rod.

[0015] By adopting the above technical solution, the upper and lower base plates can be synchronously threaded and slid in opposite directions by rotating the screw rod, thereby realizing rapid adjustment of the distance between the upper and lower welding mechanisms.

[0016] Optionally, a plurality of strip-shaped protrusions are provided on the outer wall of the transmission rod, a through hole is penetrated at the axis of the active roller, a groove is provided on the inner wall of the through hole, and the strip-shaped protrusions are slidably engaged in the groove.

[0017] By adopting the above technical solution and utilizing the arrangement of the strip-shaped protrusions, the active roller can be synchronously linked with the transmission rod when sliding on the transmission rod.

[0018] Optionally, the clamping mechanism includes a support tube, a lifting plate, a slide groove, a block and a splint, the support tube is fixed on the support frame, the lifting plate is coaxially fixed on the support tube at one end away from the support frame, the slide groove is arranged on the lifting plate, the block is slidably engaged in the slide groove, the splint is fixed on the block, and there are multiple integral structures composed of the block and the splint, which together constitute an annular structure.

[0019] By adopting the above technical solution, the clamping block slides in the slide groove, so that the diameter of the circle formed by the combination of multiple clamping plates can be adjusted, so that the clamping mechanism can clamp cables of different diameters.

[0020] Optionally, the clamping mechanism also includes a passive disk, a limiting groove and a lever, the passive disk is coaxially rotatably connected to the support tube and is located on the side of the lifting disk away from the clamping plate, the limiting groove is arranged through the passive disk, the lever is fixed on the clamping block, and the lever is slidably engaged in the limiting groove.

[0021] By adopting the above technical solution, the rotation of the passive disk is utilized to make the lever move in linkage in the limit groove, and then the block is driven to slide by the lever.

[0022] Optionally, the clamping mechanism further comprises a worm wheel, a protective seat and a worm, wherein the worm wheel is coaxially fixed to the outside of the passive disk, the protective seat is fixed to the support frame, and the worm wheel portion is slidably connected to the protective seat, and the worm is rotatably connected in the protective seat and meshes with the worm wheel. By adopting the above technical solution, the rotation of the worm drives the worm wheel to mesh and link, thereby driving the passive disk to rotate synchronously.

[0023] In a second aspect, the present application also provides a welding process, comprising the following steps: S1. Fix the cable. Fix the two sections of cable to be welded in the upper and lower clamping mechanisms respectively. When fixing, place the cable in the lifting plate, and then rotate the worm to make the worm wheel engage and link. At this time, the passive plate rotates and drives the lever to slide in the limit groove. At this time, the clamping block slides in the slide groove under force and drives the clamping plate to move until the cable is clamped and locked; S2, horizontal welding spacing adjustment, slide one end of the second docking rod in the adjustment slot, make the first docking rod and the second docking rod work synchronously, and adjust the welding spacing between the welding gun and the cable. After the adjustment is completed, lock the adjustment screw in the adjustment slot through the nut; S3, vertical welding spacing adjustment, start the second servo motor to drive the screw to rotate, at this time the upper and lower bottom plates are threaded together and slide in opposite directions on the guide rod until the upper and lower welding mechanisms are driven to move to the appropriate position; S4, surrounding welding, start the first servo motor to drive the transmission rod to rotate, and drive the active roller to rotate through the transmission rod. At this time, the driven roller is synchronously linked through the belt and drives the driven gear to rotate. The driven gear drives the linkage gear ring to engage and link, so that the welding gun rotates around the cable and welds.

[0024] By adopting the above technical solution, using S1, S2, S3 and S4 to jointly guide the operation, and then using mechanical surround welding and centering clamping structure to achieve precise temperature control and material protection during welding, the process fluctuations, sealing defects and efficiency bottlenecks of manual welding are systematically solved, and the reliability and engineering economy of mineral insulated heating cables are significantly improved.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The setting of the welding mechanism is used to realize mechanical circumferential welding, so that the current, voltage and welding speed of the cable can be adjusted in real time when being welded, avoiding local overheating or insufficient penetration caused by manual operation, and reducing defects such as incomplete penetration and undercut of the weld. At the same time, through the 360° circumferential welding path, the heat input is evenly distributed, and the magnesium oxide insulation layer is prevented from phase change or loosening due to local high temperature, so that the consistency of the weld is effectively improved. Through the programmed parameter setting, the weld size and surface finish are ensured to meet the standards, and the risk of pores and slag inclusion is reduced. The efficiency of mechanical welding is greatly improved compared with manual welding, which is especially suitable for scenes with frequent joints of long-distance cables, significantly reducing the construction period and labor costs; 2. The clamping mechanism is used to achieve the rapid centering effect of the two sections of cables, avoiding misalignment during welding, further reducing the welding error rate and improving the quality of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall external structure of a pre-cooling end heating cable connecting section welding device in this embodiment.

[0027] Figure 2 Schematic diagram of the welding mechanism structure in this embodiment.

[0028] Figure 3 Schematic diagram of the linkage gear ring and its connection structure in this embodiment.

[0029] Figure 4 Schematic diagram of the fixing ring connection structure in this embodiment.

[0030] Figure 5 Schematic diagram of the clamping mechanism structure in this embodiment.

[0031] Figure 6 Schematic diagram of the worm gear connection structure in this embodiment.

[0032] Figure 7 Schematic diagram of the passive disk and its connection structure in this embodiment.

[0033] Description of reference numerals: 1. Support frame; 2. Guide rod; 3. Welding mechanism; 31. Bottom plate; 32. Support ring; 33. Linking gear ring; 34. Fixed ring; 35. First docking rod; 36. Second docking rod; 37. Welding gun; 38. Adjusting slot; 39. Adjusting screw; 310. Driven gear; 311. Driven roller; 312. Active roller; 313. Belt; 314. Transmission rod; 315. First servo motor; 316. Screw; 317. Second servo motor; 4. Clamping mechanism; 41. Support tube; 42. Lifting plate; 43. Slide; 44. Block; 45. Clamp; 46. Passive plate; 47. Limiting slot; 48. Push rod; 49. Worm wheel; 410. Protective seat; 411. Worm. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-7 This application is described in further detail.

[0035] The embodiment of the present application discloses a pre-cooling end heating cable connection section welding device and a welding process thereof.

[0036] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In a first aspect, the present application provides a pre-cooling end heating cable connection section welding device: Reference Figure 1 and Figure 2, a pre-cold end heating cable connection section welding device, comprising a support frame 1, a guide rod 2, a welding mechanism 3 and a clamping mechanism 4, the support frame 1 is fixed to an external machine tool, a guide rod 2 is vertically fixed in the support frame 1, the welding mechanism 3 is slidably connected to the guide rod 2, and at least two groups are symmetrically arranged up and down, and the two groups of clamping mechanisms 4 are arranged at the upper and lower ends of the support frame 1, and the setting of the welding mechanism 3 is used to realize mechanical surrounding welding, so that the cable can adjust the current, voltage and welding speed in real time when being welded, avoid local overheating or insufficient penetration caused by manual operation, reduce defects such as incomplete penetration and undercut of the weld, and at the same time, through the 360° surrounding welding path, the heat input is evenly distributed, and the magnesium oxide insulation layer is prevented from phase change or loosening due to local high temperature, so that the consistency of the weld is effectively improved, and the programmed parameter setting ensures that the height, width and surface finish of the weld meet the standards, reduces the risk of pores and slag inclusions, and the mechanical welding efficiency is greatly improved compared with manual welding, which is particularly suitable for scenes with frequent joints of long-distance cables, significantly reducing the construction period and labor costs.

[0038] Specifically, the welding mechanism 3 includes a base plate 31, a supporting ring 32, a linkage gear ring 33, a fixing ring 34, a first docking rod 35, a second docking rod 36, a welding gun 37, an adjusting groove 38 and an adjusting screw 39. The adjusting groove 38 is used to limit the sliding path of the second docking rod 36, thereby achieving effective control of the moving distance of the welding gun 37, and the second docking rod 36 can be quickly locked by adjusting the screw 39.

[0039] Reference Figure 3 and Figure 4 In the embodiment of the present application, the base plate 31 is slidably connected to the guide rod 2, the supporting ring 32 is fixed on one side of the base plate 31, an installation cavity is arranged inside the supporting ring 32, the linkage gear ring 33 is coaxial and rotatably engaged in the installation cavity, the fixing ring 34 is fixed on the inner wall of the linkage gear ring 33, one end of the first docking rod 35 and the second docking rod 36 are rotatably connected to each other, the welding gun 37 is arranged at the connecting end of the first docking rod 35 and the second docking rod 36, and the other end of the first docking rod 35 is rotatably connected to the fixing ring 34, the other end of the second docking rod 36 is slidably engaged with the fixing ring 34, the adjusting groove 38 is arranged through the fixing ring 34, and the adjusting groove 38 is an arc-shaped structure, the adjusting screw 39 is arranged on the sliding connection end of the second docking rod 36 and the fixing ring 34, and the adjusting screw 39 is slidably engaged in the adjusting groove 38 and locked by a nut.

[0040] Specifically, the welding mechanism 3 also includes a driven gear 310, a driven roller 311, an active roller 312, a belt 313, a transmission rod 314 and a first servo motor 315. The first servo motor 315 is used to drive the transmission rod 314 to rotate, and then the transmission rod 314 is used to drive the active roller 312 to rotate synchronously. The belt is used to enable the driven roller 311 to rotate synchronously with the active roller 312, and then the driven gear 310 is driven to rotate. The driven gear 310 enables the linkage gear ring 33 to mesh and link, and drives the welding gun 37 to make a circular motion.

[0041] Specifically, the driven gear 310 is rotatably connected in the mounting cavity of the supporting ring 32, and the driven gear 310 is meshed with the linkage gear ring 33. The driven roller 311 is coaxially fixed with the driven gear 310 and is located outside the supporting ring 32. The active roller 312 is rotatably connected to the side of the outside of the supporting ring 32 close to the driven roller 311. The belt 313 is arranged between the driven roller 311 and the active roller 312. The transmission rod 314 is rotatably connected in the support frame 1, and the transmission rod 314 is slidably connected at the axis of the active roller 312. The first servo motor 315 is fixed on the top of the support frame 1, and the output shaft of the first servo motor 315 is coaxially fixed with the transmission rod 314.

[0042] In the embodiment of the present application, the welding mechanism 3 also includes a screw rod 316 and a second servo motor 317. The screw rod 316 is rotatably connected to the support frame 1. A screw hole is penetrated on the base plate 31. The screw rod 316 is threadedly matched with the screw hole, and two groups of reverse threads are symmetrically arranged on the screw rod 316. The second servo motor 317 is fixed on the top of the support frame 1, and the output shaft of the second servo motor 317 is coaxially fixed with the screw rod 316. The rotation of the screw rod 316 enables the upper and lower base plates 31 to be synchronously threaded and slide in opposite directions to each other, thereby realizing rapid adjustment of the spacing between the upper and lower groups of welding mechanisms 3.

[0043] Regarding the transmission rod 314, a plurality of strip-shaped protrusions are arranged on the outer wall of the transmission rod 314, a through hole is arranged through the axis of the active roller 312, a groove is arranged on the inner wall of the through hole, and the strip-shaped protrusions are slidably engaged in the grooves. By utilizing the arrangement of the strip-shaped protrusions, when the active roller 312 slides on the transmission rod 314, it can be synchronously linked with the transmission rod 314.

[0044] Reference Figure 5 and Figure 6 In the embodiment of the present application, the clamping mechanism 4 includes a support tube 41, a lifting plate 42, a slide groove 43, a block 44 and a clamping plate 45. The block 44 slides in the slide groove 43, so that the diameter of the circle formed by the combination of multiple clamping plates 45 can be adjusted, so that the clamping mechanism 4 can clamp cables of different diameters.

[0045] Specifically, the support tube 41 is fixed on the support frame 1, the lifting plate 42 is coaxially fixed on the end of the support tube 41 away from the support frame 1, the slide groove 43 is set on the lifting plate 42, the block 44 is slidably engaged in the slide groove 43, the clamping plate 45 is fixed on the block 44, and there are multiple overall structures composed of the block 44 and the clamping plate 45, which together constitute an annular structure.

[0046] Reference Figure 7 The clamping mechanism 4 also includes a passive disk 46, a limiting groove 47, a lever 48, a worm wheel 49, a protective seat 410 and a worm 411. The rotation of the worm 411 drives the worm wheel 49 to engage and link, thereby driving the passive disk 46 to rotate synchronously. The rotation of the passive disk 46 makes the lever 48 link in the limiting groove 47, and then drives the block 44 to slide through the lever 48.

[0047] The passive disk 46 is coaxially rotatably connected to the support tube 41 and is located on the side of the lifting disk 42 away from the clamping plate 45. The limiting groove 47 is set through the passive disk 46. The lever 48 is fixed on the clamping block 44, and the lever 48 is slidably engaged in the limiting groove 47. The clamping mechanism 4 also includes a worm gear 49, a protective seat 410 and a worm 411. The worm gear 49 is coaxially fixed to the outside of the passive disk 46, the protective seat 410 is fixed on the support frame 1, and the worm gear 49 is partially slidably connected to the protective seat 410. The worm 411 is rotatably connected in the protective seat 410 and meshes with the worm gear 49.

[0048] The implementation principle of a pre-cold end heating cable connection section welding device and its welding process in an embodiment of the present application is as follows: first, the cables to be welded are respectively fixed in the upper and lower clamping mechanisms 4, and then the cables are clamped and locked by the clamping plate 45. Then, according to the actual welding requirements, one end of the second docking rod 36 is controlled to slide in the adjustment groove 38, and then the distance between the welding gun 37 and the cable is adjusted, and then the second servo motor 317 is used to drive the screw rod 316 to rotate. At this time, the upper and lower base plates 31 are threadedly linked and slide in opposite directions on the guide rod 2 until the upper and lower welding mechanisms 3 are moved to the appropriate positions. Then, the transmission rod 314 is driven to rotate by the first servo motor 315, and the active roller 312 is driven to rotate by the transmission rod 314. At this time, the driven roller 311 is synchronously linked through the belt 313, and drives the driven gear 310 to rotate. The driven gear 310 drives the linkage gear ring 33 to engage and link, so that the welding gun 37 rotates around the cable and welds.

[0049] Second, refer to Figure 1-Figure 7 , the present application also provides a welding process, comprising the following steps: S1. Cable fixing. Fix the two sections of cable to be welded in the upper and lower clamping mechanisms 4 respectively. When fixing, place the cable in the lifting plate 42, and then rotate the worm 411 to make the worm wheel 49 mesh and link. At this time, the passive plate 46 rotates and drives the lever 48 to slide in the limit groove 47. At this time, the clamping block 44 is forced to slide in the slide groove 43 and drives the clamping plate 45 to move until the cable is clamped and locked; S2, horizontal welding spacing adjustment, slide one end of the second docking rod 36 in the adjustment slot 38, make the first docking rod 35 and the second docking rod 36 work synchronously, and adjust the welding spacing between the welding gun 37 and the cable. After the adjustment is completed, lock the adjusting screw 39 in the adjustment slot 38 through the nut; S3, vertical welding spacing adjustment, start the second servo motor 317 to drive the screw rod 316 to rotate, at this time the upper and lower bottom plates 31 are threadedly linked and slide in opposite directions on the guide rod 2 until the upper and lower welding mechanisms 3 are driven to move to the appropriate position; S4, surrounding welding, start the first servo motor 315 to drive the transmission rod 314 to rotate, and drive the active roller 312 to rotate through the transmission rod 314. At this time, the driven roller 311 is synchronously linked through the belt 313 and drives the driven gear 310 to rotate. The driven gear 310 drives the linkage gear ring 33 to engage and link, so that the welding gun 37 rotates around the cable and welds.

[0050] This application uses S1, S2, S3 and S4 to guide the operation, and then uses mechanical surround welding and centering clamping structure to achieve precise temperature control and material protection during welding, systematically solving the process fluctuations, sealing defects and efficiency bottlenecks of manual welding, and significantly improving the reliability and engineering economy of mineral insulated heating cables.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pre-cooling end heating cable connection section welding device, characterized in that: include: A support frame (1), the support frame (1) being fixed to an external machine tool, and a guide rod (2) being vertically fixed inside the support frame (1); A welding mechanism (3) for welding a cable connection end, wherein the welding mechanism (3) is slidably connected to the guide rod (2) and has at least two groups symmetrically arranged in an upper and lower position, wherein the welding mechanism (3) comprises a base plate (31), a supporting ring (32), a linkage gear ring (33), a fixing ring (34), a first docking rod (35), a second docking rod (36) and a welding gun (37), wherein the base plate (31) is slidably connected to the guide rod (2), the supporting ring (32) is fixed to one side of the base plate (31), and the inside of the supporting ring (32) is provided with A mounting cavity is provided, the linkage gear ring (33) is coaxial and rotatably engaged in the mounting cavity, the fixing ring (34) is fixed on the inner wall of the linkage gear ring (33), one end of the first docking rod (35) and one end of the second docking rod (36) are rotatably connected to each other, the welding gun (37) is arranged at the connecting end of the first docking rod (35) and the second docking rod (36), and the other end of the first docking rod (35) is rotatably connected to the fixing ring (34), and the other end of the second docking rod (36) is slidably engaged with the fixing ring (34); A clamping mechanism (4), the clamping mechanism (4) is used to clamp the cable, and at least two groups of the clamping mechanism (4) are symmetrically arranged in the upper and lower parts, and the two groups of the clamping mechanism (4) are arranged at the upper and lower ends of the support frame (1).

2. A pre-cooling end heating cable connection section welding device according to claim 1, characterized in that: The welding mechanism (3) further comprises an adjusting groove (38) and an adjusting screw (39); the adjusting groove (38) is arranged through the fixing ring (34) and has an arc-shaped structure; the adjusting screw (39) is arranged on the sliding connection end of the second docking rod (36) and the fixing ring (34); the adjusting screw (39) is slidably engaged in the adjusting groove (38) and is locked by a nut.

3. The pre-cooling end heating cable connection section welding equipment according to claim 1 is characterized in that: The welding mechanism (3) further comprises a driven gear (310), a driven roller (311), a driving roller (312) and a belt (313); the driven gear (310) is rotatably connected in the mounting cavity of the support ring (32), and the driven gear (310) is meshed with the linkage gear ring (33); the driven roller (311) is coaxially fixed with the driven gear (310) and is located outside the support ring (32); the driving roller (312) is rotatably connected to a side of the support ring (32) close to the driven roller (311); and the belt (313) is arranged between the driven roller (311) and the driving roller (312).

4. The pre-cooling end heating cable connection section welding equipment according to claim 3 is characterized in that: The welding mechanism (3) further comprises a transmission rod (314) and a first servo motor (315); the transmission rod (314) is rotatably connected in the support frame (1), and the transmission rod (314) is slidably connected at the axis of the active roller (312); the first servo motor (315) is fixed to the top of the support frame (1), and the output shaft of the first servo motor (315) is coaxially fixed to the transmission rod (314).

5. A pre-cooling end heating cable connection section welding device according to claim 4, characterized in that: The welding mechanism (3) further comprises a screw rod (316) and a second servo motor (317); the screw rod (316) is rotatably connected to the support frame (1); a screw hole is provided through the bottom plate (31); the screw rod (316) is threadedly matched with the screw hole; and two groups of reverse threads are symmetrically provided on the screw rod (316); the second servo motor (317) is fixed to the top of the support frame (1), and the output shaft of the second servo motor (317) is coaxially fixed to the screw rod (316).

6. The pre-cooling end heating cable connection section welding equipment according to claim 4 is characterized in that: A plurality of strip-shaped protrusions are arranged on the outer wall of the transmission rod (314); a through hole is arranged through the axis of the active roller (312); a groove is arranged on the inner wall of the through hole; and the strip-shaped protrusion is slidably engaged in the groove.

7. The pre-cooling end heating cable connection section welding equipment according to claim 1 is characterized in that: The clamping mechanism (4) comprises a support tube (41), a lifting plate (42), a slide groove (43), a clamping block (44) and a clamping plate (45); the support tube (41) is fixed on the support frame (1); the lifting plate (42) is coaxially fixed on the support tube (41) at one end away from the support frame (1); the slide groove (43) is arranged on the lifting plate (42); the clamping block (44) is slidably clamped in the slide groove (43); the clamping plate (45) is fixed on the clamping block (44); and the overall structure composed of the clamping block (44) and the clamping plate (45) is provided in plurality and together constitutes an annular structure.

8. The pre-cooling end heating cable connection section welding equipment according to claim 7 is characterized in that: The clamping mechanism (4) further comprises a passive disk (46), a limiting groove (47) and a lever (48); the passive disk (46) is coaxially rotatably connected to the support tube (41) and is located on a side of the lifting disk (42) away from the clamping plate (45); the limiting groove (47) is arranged through the passive disk (46); the lever (48) is fixed on the clamping block (44), and the lever (48) is slidably engaged in the limiting groove (47).

9. The pre-cooling end heating cable connection section welding device according to claim 8, characterized in that: The clamping mechanism (4) further comprises a worm wheel (49), a protective seat (410) and a worm (411); the worm wheel (49) is coaxially fixed to the outside of the passive disk (46); the protective seat (410) is fixed to the support frame (1); and a portion of the worm wheel (49) is slidably connected to the protective seat (410); and the worm (411) is rotatably connected in the protective seat (410) and meshes with the worm wheel (49).

10. A welding process, applied to a pre-cooling end heating cable connection section welding device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Cable fixing. Two sections of cable to be welded are fixed in the upper and lower clamping mechanisms (4) respectively. When fixing, the cable is placed in the lifting plate (42), and then the worm (411) is rotated to make the worm wheel (49) mesh and link. At this time, the passive plate (46) rotates and drives the lever (48) to slide in the limit groove (47). At this time, the clamping block (44) is forced to slide in the slide groove (43) and drives the clamping plate (45) to move until the cable is clamped and locked; S2, adjusting the horizontal welding distance, sliding one end of the second docking rod (36) in the adjusting groove (38), so that the first docking rod (35) and the second docking rod (36) are synchronously linked, and adjusting the welding distance between the welding gun (37) and the cable, after the adjustment is completed, locking the adjusting screw (39) in the adjusting groove (38) by a nut; S3, vertical welding spacing adjustment, start the second servo motor (317) to drive the screw rod (316) to rotate, at this time, the upper and lower base plates (31) are threadedly linked and slide in opposite directions on the guide rod (2) until the upper and lower welding mechanisms (3) are driven to move to appropriate positions; S4, encircling welding, starting the first servo motor (315) to drive the transmission rod (314) to rotate, and the driving roller (312) is driven to rotate through the transmission rod (314). At this time, the driven roller (311) is synchronously linked through the belt (313) and drives the driven gear (310) to rotate. The driven gear (310) drives the linkage gear ring (33) to mesh and link, so that the welding gun (37) rotates around the cable and welds.

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