Welding device for cooling fins of oil-immersed transformer

Abstract

The welding device comprises a movable frame, an oil collecting pipe welding clamp and an automatic welding machine, telescopic rods are arranged on the left side and the right side of the outer portion of the movable frame, an upper supporting plate is arranged on the tops of the telescopic rods, and a linkage positioning mechanism is installed on the upper supporting plate; synchronous locking of the multiple cooling fins is achieved through the linkage positioning mechanism; an oil collecting pipe welding clamp is arranged below the inner side of the movable frame, and the oil collecting pipe is clamped and positioned through the oil collecting pipe welding clamp; a sliding rod is installed below the oil collecting pipe welding clamp, a sliding base is installed outside the sliding rod in a sliding mode, a multi-axis mechanical arm is arranged above the sliding base, an automatic welding machine is installed at the top end of the multi-axis mechanical arm, and welding work of the cooling fins and the oil collecting pipe is completed through the automatic welding machine. The welding device has the advantages of being reasonable in structure, convenient to use, good in welding effect and capable of improving working efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer processing, and in particular relates to a welding device for a heat sink of an oil-immersed transformer. Background Art

[0002] The oil-immersed transformer will generate a certain amount of heat when working. The multiple heat sinks connected and arranged on the oil collecting pipe are used to increase the contact area between the transformer and the outside world, accelerate the transfer of heat, and transfer the heat generated inside the transformer to the external environment, thereby reducing the temperature of the transformer. This can not only avoid accidents caused by overheating of the transformer, but also reduce the aging of the insulating material inside the transformer and extend the service life of the transformer. However, the heat sink of the oil-immersed transformer and the oil collecting pipes at both ends are usually welded manually. Due to the technical level and working status of the welder, the welding quality may be unstable and welding defects may occur easily. In addition, manual welding requires a fixed posture to be maintained for a long time, which may cause fatigue and affect work efficiency, thereby easily causing the heat sink to be misplaced or the oil collecting pipe to be tilted, affecting the welding quality. In addition, during welding, it is often necessary to manually carry a welding gun to shift or flip the heat sink back and forth to ensure the angle and position during welding. The welding is difficult and difficult to operate, which not only has high labor intensity, but also has low work efficiency. Therefore, it is very necessary to provide a welding device for oil-immersed transformer heat sinks with a reasonable structure, easy to use, good welding effect, and improved work efficiency. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a welding device for oil-immersed transformer heat sinks which has a reasonable structure, is easy to use, has a good welding effect and improves work efficiency.

[0004] The objective of the present invention is achieved as follows: A welding device for an oil-immersed transformer heat sink comprises a movable frame, an oil collecting pipe welding fixture and an automatic welding machine, telescopic rods are arranged on both sides of the outside of the movable frame, an upper support plate is arranged on the top of the telescopic rod, a linkage positioning mechanism is installed on the upper support plate, and a plurality of heat sinks are synchronously locked by the linkage positioning mechanism; an oil collecting pipe welding fixture is arranged on the lower inner side of the movable frame, and the oil collecting pipe is clamped and positioned by the oil collecting pipe welding fixture; a sliding rod is installed below the oil collecting pipe welding fixture, a sliding seat is slidably installed on the outside of the sliding rod, a multi-axis mechanical arm is arranged above the sliding seat, an automatic welding machine is installed on the top of the multi-axis mechanical arm, and the welding work of the heat sink and the oil collecting pipe is completed by the automatic welding machine.

[0005] The linkage positioning mechanism includes a screw rod located inside the upper support plate, one end of the screw rod is dynamically connected to a driver, a plurality of wire seats are evenly installed on the outside of the screw rod from left to right, a movable splint is arranged under each of the wire seats, and a fixed splint is installed on one side of each of the movable splints.

[0006] The mobile frame includes a frame, and lifting sleeve pipes are arranged above both ends of the frame. The lifting sleeve pipes realize height positioning function through locking bolts, and beams are arranged below the lifting sleeve pipes. A group of self-locking universal wheels are arranged at the ends of the beams.

[0007] The tops of the lifting sleeve pipes at both ends of the frame are respectively installed with an output shaft seat and a brake positioning mechanism, and the inner sides of the output shaft seat and the brake positioning mechanism are both installed with telescopic pipe end clamping sleeves.

[0008] The brake positioning mechanism includes a bearing seat installed on the top of the lifting sleeve tube, a main shaft is arranged inside the bearing seat, a flywheel is installed outside the main shaft, a brake frame is installed outside the flywheel, a limited locking seat is installed on one side of the brake frame, a brake pad is sleeved on the outside of the flywheel, a brake pad is installed at the connection between the inner side of the brake pad and the flywheel, the lower end of the brake pad is connected to the brake frame by an adjusting bolt, and the upper end is connected to the connecting block, and a brake pull rod passing through the limited locking seat is installed below the connecting block.

[0009] The oil collecting pipe welding fixture comprises a square tube, a plurality of fixing sleeves are movably installed on the outside of the square tube from left to right, a group of first adjusting rods are arranged above the fixing sleeves, a group of second adjusting rods are movably connected to the top of the first adjusting rods, and a positioning fixture is installed on the top of the second adjusting rods.

[0010] The positioning fixture is generally in a "C" shape and is provided with a fixing claw at one end and a screw sleeve at the other end, and a movable nut is provided inside the screw sleeve; the connection between the lower end of the first adjusting rod and the fixing sleeve, the connection between the upper end of the first adjusting rod and the second adjusting rod, and the connection between the upper end of the second adjusting rod and the positioning fixture are all movably connected through an adjustable locking rod.

[0011] The automatic welding machine includes a base plate, an eight-shaped bracket is arranged in front of the base plate, a main gear is arranged above the inside of the eight-shaped bracket, large gears are meshed on both sides of the main gear, and small gears are meshed below the large gears, an outer guard plate is arranged below the front of the base plate, a gear ring meshed with the small gear is arranged inside the outer guard plate, a gear ring seat connected to the gear ring is arranged at the back of the base plate, and a welder is installed in front of the gear ring seat.

[0012] The automatic welding machine also includes a stabilizing clamp, which includes a mounting seat connected to an eight-shaped bracket, a group of connecting rods are movably installed at the front and lower part of the mounting seat, and pipe clamps are movably installed at the lower ends of the connecting rods. A driving rotating plate is movably installed at the lower part of the mounting seat, and the lower end of the driving rotating plate is movably connected to the pipe clamp, and the upper end is movably connected to the moving block, and an electric screw is arranged inside the moving block and extends upward through the mounting seat.

[0013] The welder includes an L-shaped seat connected to the gear ring seat, a cylinder is provided on one side of the L-shaped seat, and a movable plate connected to the cylinder power is provided on the other side, a welding gun head is provided on the top of the movable plate, and a hinged rod connected to the middle part of the movable plate is provided above the L-shaped seat.

[0014] The beneficial effects of the present invention are as follows: the present invention is a welding device for heat sinks of oil-immersed transformers. During use, first, the oil collecting pipe is fixed on the oil collecting pipe welding fixture, and then, a plurality of heat sinks are vertically clamped on the upper support plate at equal intervals through a linkage positioning mechanism, and then the height of the telescopic rod is adjusted so that the telescopic rod drives the upper support plate and the heat sinks to move down to the oil collecting pipe, and the ends of adjacent heat sinks in contact with the oil collecting pipe are abutted against the oil collecting pipe through an arc-shaped welding gasket gap; the position of the automatic welding machine is adjusted by cooperating with the sliding seat and the sliding rod, and then the automatic welding machine is adjusted to the vertex position of the edge of the welding gasket to be welded by a multi-axis robotic arm, and then the automatic welding machine drives the welder to rotate around the circumferential direction of the oil collecting pipe to complete the comprehensive welding operation of the welding gasket. After the welding is completed, the multi-axis robotic arm is adjusted The automatic welding machine is positioned, and then moved to the next welding location through the cooperation of the slide seat and the slide rod to perform welding operations until all welding operations are completed; then, the welding operation is stopped, the clamping state of the oil collecting pipe welding fixture on the oil collecting pipe is released, and the lifting rod drives the upper support plate and the heat sink to move up to the appropriate position, and the two ends of the oil collecting pipe are clamped by the telescopic pipe end sleeves, and then the main shaft of the brake positioning mechanism is used as power input, and the output shaft seat is used as power output, and with the assistance of the operator or the assistance of the mechanical device, the flipping operation of the heat sink and the oil collecting pipe is realized, and then the new oil collecting pipe is clamped and locked by the oil collecting pipe welding fixture, and the above welding operation can be repeated to finally complete the welding work of the two ends of the heat sink and the oil collecting pipe; the present invention has the advantages of reasonable structure, easy use, good welding effect and improved work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the mobile rack of the present invention.

[0017] Figure 3 For the present invention Figure 2 Side view of.

[0018] Figure 4 It is a structural schematic diagram of the oil collecting pipe welding fixture of the present invention.

[0019] Figure 5 For the present invention Figure 4 Side view of.

[0020] Figure 6It is a structural schematic diagram of the automatic welding machine of the present invention.

[0021] Figure 7 For the present invention Figure 6 Front view of .

[0022] Figure 8 For the present invention Figure 6 Rear view of.

[0023] Fig. 9 It is a schematic structural diagram of the welding device of the present invention.

[0024] In the figure: 1, mobile frame 11, frame 12, lifting sleeve pipe 13, locking bolt 14, crossbeam 15, self-locking universal wheel 2, output shaft seat 3, brake positioning mechanism 31, bearing seat 32, main shaft 33, brake frame 34, limit locking seat 35, flywheel 36, brake pad 37, brake pad 38, adjusting bolt 39, connecting block 301, brake pull rod 4, telescopic pipe end sleeve 5, telescopic rod 6, upper support plate 7, linkage positioning mechanism 71, screw rod 72, driver 73, screw seat 74, mobile splint 75, fixed splint 8, oil collecting pipe welding fixture 81, square tube 82, fixed sleeve 83, first adjusting rod 84, second adjusting rod 85, positioning fixture 86, fixing claw 87, screw sleeve 88, movable nut 89, adjustable locking rod 9, automatic welding machine 91, base plate 92, figure eight bracket 93, main gear 94, large gear 95, small gear 96, outer guard plate 97, ring gear 98, stabilizing fixture 801, mounting seat 802, connecting rod 803, pipe clamp 804, driving rotating plate 805, moving block 806, electric screw 99, ring gear seat 910, welder 101, L-shaped seat 102, cylinder 103, movable plate 104, welding gun head 105, articulated rod 10, multi-axis robot arm 20, slide seat 30, slide rod 40, heat sink 50, oil collecting pipe. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings. Example 1

[0026] like Figure 1-9As shown, a welding device for oil-immersed transformer heat sink, comprising a movable frame 1, an oil collecting pipe welding fixture 8 and an automatic welding machine 9, wherein telescopic rods 5 are arranged on both sides of the outer side of the movable frame 1, an upper supporting plate 6 is arranged on the top of the telescopic rod 5, a linkage positioning mechanism 7 is installed on the upper supporting plate 6, and a plurality of heat sinks 40 are synchronously locked by the linkage positioning mechanism 7; an oil collecting pipe welding fixture 8 is arranged on the lower inner side of the movable frame 1, and the oil collecting pipe 50 is clamped and positioned by the oil collecting pipe welding fixture 8; a sliding rod 30 is installed below the oil collecting pipe welding fixture 8, a sliding seat 20 is slidably installed on the outer side of the sliding rod 30, a multi-axis mechanical arm 10 is arranged above the sliding seat 20, an automatic welding machine 9 is installed on the top of the multi-axis mechanical arm 10, and the welding work of the heat sink 40 and the oil collecting pipe 50 is completed by the automatic welding machine 9.

[0027] The linkage positioning mechanism 7 includes a screw rod 71 located inside the upper support plate 6, one end of the screw rod 71 is dynamically connected to a driver 72, a plurality of wire seats 73 are evenly installed on the outside of the screw rod 71 from left to right, a movable splint 74 is provided under each of the wire seats 73, and a fixed splint 75 is installed on one side of each of the movable splints 74.

[0028] In this embodiment, the working principle of the linkage positioning mechanism is: the upper end of the heat sink is located between the movable clamping plate and the fixed clamping plate and arranged in sequence, the driver is started, and the driver drives the wire seat to move along the screw rod through the screw rod, thereby realizing the movement of the movable clamping plate, and the heat sink can be quickly clamped and fixed by the cooperation of the movable clamping plate and the fixed clamping plate. The present invention realizes the synchronous clamping, fixing and releasing of multiple heat sinks through the cooperation of the screw rod and multiple wire seats, thereby greatly improving the work efficiency; the present invention arranges multiple heat sinks vertically at equal intervals and clamps them in place through the linkage positioning mechanism, so that the lower ends of the heat sinks are stably and reliably fixed on the oil collecting pipe, which is convenient for the automatic welding machine to weld the heat sink and the oil collecting pipe, and avoids misalignment of the heat sink or tilting of the oil collecting pipe during welding.

[0029] The mobile frame 1 includes a frame 11, and lifting sleeve pipes 12 are arranged above both ends of the frame 11. The lifting sleeve pipes 12 realize the height positioning function through locking bolts 13. A cross beam 14 is arranged below the lifting sleeve pipe 12, and a group of self-locking universal wheels 15 are arranged at the ends of the cross beam 14.

[0030] The oil collecting pipe welding fixture 8 includes a square tube 81, and a plurality of fixing sleeves 82 are movably installed on the outside of the square tube 81 from left to right. A group of first adjusting rods 83 are arranged above the fixing sleeves 82, and a group of second adjusting rods 84 are movably connected to the top of the first adjusting rods 83, and a positioning fixture 85 is installed on the top of the second adjusting rods 84.

[0031] The positioning fixture 85 is an overall "C"-shaped structure and is provided with a fixing claw 86 at one end of the positioning fixture 85 and a screw sleeve 87 at the other end, and a movable nut 88 is provided inside the screw sleeve 87; the connection between the lower end of the first adjusting rod 83 and the fixing sleeve 82, the connection between the upper end of the first adjusting rod 83 and the second adjusting rod 84, and the connection between the upper end of the second adjusting rod 84 and the positioning fixture 85 are all movably connected through an adjustable locking rod 89.

[0032] In this embodiment, the working principle of the oil collecting pipe welding fixture is: the position and height of the positioning fixture can be adjusted at will through the first adjusting rod and the second adjusting rod. After adjusting the appropriate position and height, the oil collecting pipe is placed in the positioning fixture, and then the movable nut is tightened. The movable nut is used to effectively clamp and fix the oil collecting pipe to avoid misalignment of the oil collecting pipe during welding.

[0033] The automatic welding machine 9 includes a base plate 91, an eight-shaped bracket 92 is arranged in front of the base plate 91, a main gear 93 is arranged on the upper part of the eight-shaped bracket 92, large gears 94 are meshed on both sides of the main gear 93, and small gears 95 are meshed below the large gears 94, an outer guard plate 96 is arranged on the lower front of the base plate 91, a gear ring 97 meshed with the small gear 95 is arranged inside the outer guard plate 96, a gear ring seat 99 connected to the gear ring 97 is arranged at the back of the base plate 91, and a welder 910 is installed in front of the gear ring seat 99.

[0034] The automatic welding machine 9 also includes a stabilizing fixture 98, which includes a mounting seat 801 connected to the figure-eight bracket 92, a group of connecting rods 802 are movably installed at the front and lower part of the mounting seat 801, and a pipe clamp 803 is movably installed at the lower end of each connecting rod 802. A driving rotating plate 804 is movably installed at the lower part of the mounting seat 801, and the lower end of the driving rotating plate 804 is movably connected to the pipe clamp 803, and the upper end is movably connected to the moving block 805. The moving block 805 is provided with an electric screw 806 that passes through the mounting seat 801 and extends upward.

[0035] In this embodiment, the working principle of the automatic welding machine is as follows: when the multi-axis robotic arm adjusts the automatic welding machine to the position where the oil collecting pipe needs to be welded, the automatic welding machine first clamps the oil collecting pipe through a stabilizing fixture, and the electric screw drives the moving block to move upward, and the moving block drives the driving rotating plate to rotate around the movable connection between the middle of the driving rotating plate and the mounting seat, thereby realizing the connection between the lower end of the driving rotating plate and the pipe clamp and driving the pipe clamp to move inward, and the connecting rod can ensure the smooth and reliable movement of the pipe clamp, and the effective clamping function of the oil collecting pipe is realized through a group of pipe clamps, thereby ensuring the quality of the weld; then the main gear drives the pinion gear to rotate through the large gear, and the pinion gear drives the incomplete gear ring to rotate, and the incomplete gear ring drives the welder to rotate through the gear ring seat, so that the welder rotates along the circumference of the oil collecting pipe, so that the welder can rotate and perform short arc welding on the heat sink on the oil collecting pipe, and then cooperates with the multi-axis robotic arm, the slide seat and the slide rod to realize continuous welding of multiple heat sinks on the oil collecting pipe, thereby improving the welding work efficiency and ensuring the quality of the weld.

[0036] The welder 910 includes an L-shaped seat 101 connected to the gear ring seat 99, a cylinder 102 is provided on one side of the L-shaped seat 101, and a movable plate 103 connected to the power of the cylinder 102 is provided on the other side, a welding gun head 104 is provided on the top of the movable plate 103, and a hinged rod 105 connected to the middle part of the movable plate 103 is provided above the L-shaped seat 101.

[0037] In this embodiment, the working principle of the welder is: during the welding process, the movable plate can also be driven by the cylinder to rotate with the connection between the hinge rod and the movable plate as the rotation point, thereby realizing the position adjustment of the welding gun head, so as to better suit the welding operation. The present invention uses automated welding equipment to replace traditional manual welding methods, with relatively low production costs, less prone to welding defects, and effectively improved work efficiency.

[0038] The present invention is a welding device for heat sinks of oil-immersed transformers. During use, first, the oil collecting pipe 50 is fixed on the oil collecting pipe welding fixture 8, and then, a plurality of heat sinks 40 are vertically fixed on the upper support plate 6 at equal intervals through the linkage positioning mechanism 7, and then the height of the telescopic rod 5 is adjusted so that the telescopic rod 5 drives the upper support plate 6 and the heat sink 40 to move down to the oil collecting pipe 50, and the ends of the adjacent heat sinks 40 that are in contact with the oil collecting pipe 50 are abutted against the oil collecting pipe 50 through the arc-shaped welding gasket gap; the position of the automatic welding machine 9 is adjusted by cooperating with the slide seat 20 and the slide rod 30, and then the automatic welding machine 9 is adjusted to the vertex position of the edge of the welding gasket to be welded by the multi-axis robot arm 10, and then the automatic welding machine 9 drives the welder 910 to rotate around the circumferential direction of the oil collecting pipe 50 to complete the comprehensive welding operation of the welding gasket. After the welding is completed, the multi-axis robot arm 10 adjusts the automatic welding machine 9 to rotate around the circumferential direction of the oil collecting pipe 50 to complete the comprehensive welding operation of the welding gasket. The position of the mobile welding machine 9 is moved, and then the sliding seat 20 and the sliding rod 30 are cooperated to move to the next welding place for welding operation until all welding operations are completed; then, the welding operation is stopped, and the clamping state of the oil collecting pipe 50 by the oil collecting pipe welding fixture 8 is released. After the lifting rod 5 drives the upper support plate 6 and the heat sink 40 to move up to the appropriate position, the two ends of the oil collecting pipe 50 are clamped by the telescopic pipe end sleeve 4, and then the main shaft 32 of the brake positioning mechanism 3 is used as power input, and the output shaft seat 2 is used as power output, and with the assistance of the operator or the assistance of the mechanical device, the flipping operation of the heat sink 40 and the oil collecting pipe 50 is realized, and then the new oil collecting pipe 50 is clamped and locked by the oil collecting pipe welding fixture 8, and the above welding operation can be repeated, and finally the welding work of the two ends of the heat sink 40 and the oil collecting pipe 50 is completed; the present invention has the advantages of reasonable structure, easy use, good welding effect and improved work efficiency. Example 2

[0039] like Figure 1-9 As shown, a welding device for oil-immersed transformer heat sink, comprising a movable frame 1, an oil collecting pipe welding fixture 8 and an automatic welding machine 9, wherein telescopic rods 5 are arranged on both sides of the outer side of the movable frame 1, an upper supporting plate 6 is arranged on the top of the telescopic rod 5, a linkage positioning mechanism 7 is installed on the upper supporting plate 6, and a plurality of heat sinks 40 are synchronously locked by the linkage positioning mechanism 7; an oil collecting pipe welding fixture 8 is arranged on the lower inner side of the movable frame 1, and the oil collecting pipe 50 is clamped and positioned by the oil collecting pipe welding fixture 8; a sliding rod 30 is installed below the oil collecting pipe welding fixture 8, a sliding seat 20 is slidably installed on the outer side of the sliding rod 30, a multi-axis mechanical arm 10 is arranged above the sliding seat 20, an automatic welding machine 9 is installed on the top of the multi-axis mechanical arm 10, and the welding work of the heat sink 40 and the oil collecting pipe 50 is completed by the automatic welding machine 9.

[0040] The tops of the lifting sleeve pipes 12 at both ends of the frame 11 are respectively installed with an output shaft seat 2 and a brake positioning mechanism 3 , and the inner sides of the output shaft seat 2 and the brake positioning mechanism 3 are both installed with telescopic pipe end clamping sleeves 4 .

[0041] The brake positioning mechanism 3 includes a bearing seat 31 installed on the top of the lifting sleeve tube 12, a main shaft 32 is arranged inside the bearing seat 31, a flywheel 35 is installed outside the main shaft 32, a brake frame 33 is installed outside the flywheel 35, a limited locking seat 34 is installed on one side of the brake frame 33, a brake pad 36 is sleeved on the outside of the flywheel 35, a brake pad 37 is installed at the connection between the inner side of the brake pad 36 and the flywheel 35, the lower end of the brake pad 36 is connected to the brake frame 33 by an adjusting bolt 38, and the upper end is connected to the connecting block 39, and a brake pull rod 301 passing through the limited locking seat 34 is installed below the connecting block 39.

[0042] In this embodiment, the working principle of the brake positioning mechanism is as follows: the two ends of the oil collecting pipe are clamped by the telescopic pipe end clamping sleeve, and then the main shaft of the brake positioning mechanism is used as power input (the main shaft can be driven to rotate by the reducer, or the main shaft can be driven to rotate by turning the manual handle), and the output shaft seat is used as power output, and the heat sink and the oil collecting pipe are flipped with the assistance of the operator or the assistance of the mechanical device. When the heat sink and the oil collecting pipe are flipped into place, the brake rod is pulled downward (it can also be driven by a mechanical power structure, such as a hydraulic rod, etc.). Since the lower end of the brake pad is connected to the brake frame through the adjusting bolt and the upper end is connected to the connecting block, when the brake rod is pulled, the connecting block and the brake pad connected to the connecting block can be tightened by the brake rod, so that the brake pad through the brake pad is in contact with the flywheel, and the braking effect on the flywheel is achieved. Then, the brake rod is locked by the limit locking seat to complete the flipping and positioning operation of the heat sink and the oil collecting pipe, so that it is convenient to clamp and lock the new oil collecting pipe 50 through the oil collecting pipe welding fixture 8, and repeat the above welding operation to finally complete the welding work between the two ends of the heat sink and the oil collecting pipe.

[0043] The present invention is a welding device for heat sinks of oil-immersed transformers. During use, first, the oil collecting pipe 50 is fixed on the oil collecting pipe welding fixture 8, and then, a plurality of heat sinks 40 are vertically fixed on the upper support plate 6 at equal intervals through the linkage positioning mechanism 7, and then the height of the telescopic rod 5 is adjusted so that the telescopic rod 5 drives the upper support plate 6 and the heat sink 40 to move down to the oil collecting pipe 50, and the ends of the adjacent heat sinks 40 that are in contact with the oil collecting pipe 50 are abutted against the oil collecting pipe 50 through the arc-shaped welding gasket gap; the position of the automatic welding machine 9 is adjusted by cooperating with the slide seat 20 and the slide rod 30, and then the automatic welding machine 9 is adjusted to the vertex position of the edge of the welding gasket to be welded by the multi-axis robot arm 10, and then the automatic welding machine 9 drives the welder 910 to rotate around the circumferential direction of the oil collecting pipe 50 to complete the comprehensive welding operation of the welding gasket. After the welding is completed, the multi-axis robot arm 10 adjusts the automatic welding machine 9 to rotate around the circumferential direction of the oil collecting pipe 50 to complete the comprehensive welding operation of the welding gasket. The position of the mobile welding machine 9 is moved, and then the sliding seat 20 and the sliding rod 30 are cooperated to move to the next welding place for welding operation until all welding operations are completed; then, the welding operation is stopped, and the clamping state of the oil collecting pipe 50 by the oil collecting pipe welding fixture 8 is released. After the lifting rod 5 drives the upper support plate 6 and the heat sink 40 to move up to the appropriate position, the two ends of the oil collecting pipe 50 are clamped by the telescopic pipe end sleeve 4, and then the main shaft 32 of the brake positioning mechanism 3 is used as power input, and the output shaft seat 2 is used as power output, and with the assistance of the operator or the assistance of the mechanical device, the flipping operation of the heat sink 40 and the oil collecting pipe 50 is realized, and then the new oil collecting pipe 50 is clamped and locked by the oil collecting pipe welding fixture 8, and the above welding operation can be repeated, and finally the welding work of the two ends of the heat sink 40 and the oil collecting pipe 50 is completed; the present invention has the advantages of reasonable structure, easy use, good welding effect and improved work efficiency.

Claims

1. A welding device for oil-immersed transformer heat sink, comprising a mobile frame, an oil collecting pipe welding fixture and an automatic welding machine, characterized in that: Telescopic rods are provided on both sides of the left and right sides of the exterior of the movable frame, an upper support plate is provided on the top of the telescopic rod, a linkage positioning mechanism is installed on the upper support plate, and multiple heat sinks are synchronously locked through the linkage positioning mechanism; an oil collecting pipe welding fixture is provided on the lower inner side of the movable frame, and the oil collecting pipe is clamped and positioned through the oil collecting pipe welding fixture; a sliding rod is installed below the oil collecting pipe welding fixture, a sliding seat is slidably installed on the outside of the sliding rod, a multi-axis robotic arm is provided above the sliding seat, an automatic welding machine is installed on the top of the multi-axis robotic arm, and the welding of the heat sink and the oil collecting pipe is completed through the automatic welding machine.

2. A welding device for oil-immersed transformer heat sink according to claim 1, characterized in that: The linkage positioning mechanism includes a screw rod located inside the upper support plate, one end of the screw rod is dynamically connected to a driver, a plurality of wire seats are evenly installed on the outside of the screw rod from left to right, a movable splint is arranged under each of the wire seats, and a fixed splint is installed on one side of each of the movable splints.

3. A welding device for oil-immersed transformer heat sink according to claim 2, characterized in that: The mobile frame includes a frame, and lifting sleeve pipes are arranged above both ends of the frame. The lifting sleeve pipes realize height positioning function through locking bolts, and beams are arranged below the lifting sleeve pipes. A group of self-locking universal wheels are arranged at the ends of the beams.

4. A welding device for oil-immersed transformer heat sink according to claim 3, characterized in that: The tops of the lifting sleeve pipes at both ends of the frame are respectively installed with an output shaft seat and a brake positioning mechanism, and the inner sides of the output shaft seat and the brake positioning mechanism are both installed with telescopic pipe end clamping sleeves.

5. A welding device for oil-immersed transformer heat sink according to claim 4, characterized in that: The brake positioning mechanism includes a bearing seat installed on the top of the lifting sleeve tube, a main shaft is arranged inside the bearing seat, a flywheel is installed outside the main shaft, a brake frame is installed outside the flywheel, a limited locking seat is installed on one side of the brake frame, a brake pad is sleeved on the outside of the flywheel, a brake pad is installed at the connection between the inner side of the brake pad and the flywheel, the lower end of the brake pad is connected to the brake frame by an adjusting bolt, and the upper end is connected to the connecting block, and a brake pull rod passing through the limited locking seat is installed below the connecting block.

6. A welding device for oil-immersed transformer heat sink according to claim 5, characterized in that: The oil collecting pipe welding fixture comprises a square tube, a plurality of fixing sleeves are movably installed on the outside of the square tube from left to right, a group of first adjusting rods are arranged above the fixing sleeves, a group of second adjusting rods are movably connected to the top of the first adjusting rods, and a positioning fixture is installed on the top of the second adjusting rods.

7. A welding device for oil-immersed transformer heat sink according to claim 6, characterized in that: The positioning fixture is generally in a "C" shape and is provided with a fixing claw at one end and a screw sleeve at the other end, wherein a movable nut is provided inside the screw sleeve; the connection between the lower end of the first adjusting rod and the fixing sleeve, the connection between the upper end of the first adjusting rod and the second adjusting rod, and the connection between the upper end of the second adjusting rod and the positioning fixture are all movably connected through an adjustable locking rod.

8. A welding device for oil-immersed transformer heat sink according to claim 7, characterized in that: The automatic welding machine includes a base plate, an eight-shaped bracket is arranged in front of the base plate, a main gear is arranged above the inside of the eight-shaped bracket, large gears are meshed on both sides of the main gear, and small gears are meshed below the large gears, an outer guard plate is arranged below the front of the base plate, a gear ring meshed with the small gear is arranged inside the outer guard plate, a gear ring seat connected to the gear ring is arranged at the back of the base plate, and a welder is installed in front of the gear ring seat.

9. A welding device for oil-immersed transformer heat sink according to claim 8, characterized in that: The automatic welding machine also includes a stabilizing clamp, which includes a mounting seat connected to an eight-shaped bracket, a group of connecting rods are movably installed at the front and lower part of the mounting seat, and pipe clamps are movably installed at the lower ends of the connecting rods. A driving rotating plate is movably installed at the lower part of the mounting seat, and the lower end of the driving rotating plate is movably connected to the pipe clamp, and the upper end is movably connected to the moving block, and an electric screw is arranged inside the moving block and extends upward through the mounting seat.

10. A welding device for oil-immersed transformer heat sink according to claim 9, characterized in that: The welder includes an L-shaped seat connected to the gear ring seat, a cylinder is provided on one side of the L-shaped seat, and a movable plate connected to the cylinder power is provided on the other side, a welding gun head is provided on the top of the movable plate, and a hinged rod connected to the middle part of the movable plate is provided above the L-shaped seat.

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