Internal welding device for stator end ring of submersible pump motor

Abstract

The invention relates to the field of gas shielded welding, and particularly discloses a submersible pump motor stator end ring interior welding device which comprises a base and a mounting frame, a rotating table is rotationally connected to the base, a first telescopic rod is mounted at one end of the upper portion of the mounting frame, and a welding mechanism used for welding an end ring is mounted below the first telescopic rod; a slag receiving mechanism is connected to the gas distribution pipe in a sliding mode and comprises a slag receiving disc. According to the welding device, the multiple wire outlet pipes are designed, so that the welding speed can be increased, and meanwhile, the wire outlet pipes are movable, so that the welding device can adapt to various pump bodies with different sizes. By designing a plurality of air outlet rings and inclined air outlet pipes, the welding position can be protected, molten welding wires with gravity influence can be supported, meanwhile, cooling of the molten welding wires is accelerated, and the welding quality and efficiency are improved. And molten metal dripping during welding can be shielded through the slag receiving mechanism, and the situation that the molten metal falls into the pump body, flaws are caused to the interior of the pump body, and consequently follow-up installation is affected is avoided.

Description

Technical Field

[0001] The invention relates to the field of gas shielded welding, and in particular to an internal welding device for a stator end ring of a submersible pump motor. Background Art

[0002] The submersible pump motor stator end ring welding is connected to the submersible pump flange at both ends of the submersible pump motor stator. It requires full welding on both the inside and outside, and there must be no welding defects such as sand holes, leaks, cracks, and bites. Its welding quality directly affects the assembly quality of the submersible pump motor.

[0003] When welding the stator end ring to the pump body, when welding the inner downward part of the pump body, the melted welding wire may drip into the inside of the pump body under the influence of gravity, thereby causing defects inside the pump body. Therefore, those skilled in the art provide a submersible pump motor stator end ring internal welding device to solve the problems raised in the above background technology. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a submersible pump motor stator end ring internal welding device, comprising a base and a mounting frame, the base is rotatably connected to a rotating table, a telescopic rod 1 is installed at one end above the mounting frame, and a welding mechanism for welding the end ring is installed below the telescopic rod 1;

[0005] The welding mechanism includes a connecting frame, which is connected to the lower end of the telescopic rod, a connecting platform is connected below the connecting frame, a connecting air pipe is slidably connected above the connecting frame, the connecting air pipe is communicated with the connecting platform below, a plurality of wire outlet pipes for wire feeding are slidably connected to the peripheral side of the connecting platform, an air distribution mechanism is connected below the connecting platform, the air distribution mechanism includes a plurality of air distribution pipes, the air distribution pipes are connected to the wire outlet pipe, one end of the air distribution pipe is fixedly connected to a mounting head, an air outlet ring is installed above the mounting head, one end of the wire outlet pipe is located inside the air outlet ring, and a plurality of oblique air outlet pipes are installed at one end of the mounting head, the oblique air outlet pipes are inclined upward toward the lower end of one end of the wire outlet pipe;

[0006] The gas distribution pipe is slidably connected with a slag receiving mechanism, which includes a slag receiving plate, and the slag receiving plate is located below the mounting head.

[0007] Preferably, a gear ring is fixedly connected to the rotating table, a motor is installed on one side of the lower end of the mounting frame close to the base, and a gear 1 is fixedly connected below the motor, and the gear 1 meshes with the gear ring.

[0008] Preferably, a telescopic rod 2 is fixedly connected to the upper part of the lower end of the connecting frame, the telescopic rod 2 is fixedly connected to the upper end of the connecting air pipe, the lower end of the connecting air pipe is inserted into the connecting platform, the outer side of the connecting air pipe is located below the connecting frame and is fixedly connected to a fixed sleeve, the outer side of the upper end of the wire outlet tube is fixedly connected to a connecting sleeve, a connecting rod is connected between the connecting sleeve and the fixed sleeve, a plurality of moving blocks are slidably connected to the peripheral side of the connecting platform, and the wire outlet tube passes through one end of the moving block.

[0009] Preferably, the gas distribution mechanism includes a gas distribution plate, the upper end of the gas distribution plate is fixedly connected to a connecting pipe, the upper end of the connecting pipe is inserted into the interior of the connecting platform and communicated with the connecting platform, a plurality of the gas distribution pipes are inserted into the circumference of the gas distribution plate, and a connecting plate is connected between the wire outlet pipe and the gas distribution pipe.

[0010] Preferably, the slag receiving mechanism includes a moving rod, which is slidably connected to the outside of the gas distribution pipe, and the slag receiving plate is fixedly connected to the lower end of the moving rod. A fixed rod is fixedly connected to one side of the upper end of the mounting head, and the fixed rod passes through the upper end of the moving rod. A spring is provided on the outside of the fixed rod, and the spring is located on one side of the moving rod. One end of the slag receiving plate can be aligned up and down with one end of the mounting head.

[0011] Preferably, a gear 2 is rotatably connected below the gas distribution pipe, a push plate is fixedly connected to the lower end of the gear 2, the push plate is located on one side of the slag receiving plate, a rack is fixedly connected below the gas distribution plate, one end of the rack is located on one side of the gear 2, and the rack is meshed with the gear 2.

[0012] Preferably, a limiting block is inserted into one side of the moving rod, a limiting hole is opened on the side of one end of the air distribution pipe, one end of the limiting block can be inserted into the limiting hole, an insertion hole is opened at the other end of the limiting block, one end of the insertion hole is provided with an inclined surface, a spring is connected between the upper end of the insertion hole and the upper end of the moving rod, a limiting rod is fixedly connected to one side of the air distribution plate, one end of the limiting rod is an inclined surface, and one end of the limiting rod is inserted into the insertion hole and passes through the limiting block.

[0013] Preferably, one end of the slag receiving pan is arc-shaped and elastic, and the bottom surface of the slag receiving pan is made of elastic high-temperature resistant material.

[0014] Preferably, the centers of the connecting platform and the gas separation mechanism and the center of the rotating platform are located on the same vertical line.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention is designed with multiple wire outlet pipes, through which the wires enter the pump body, thereby increasing the welding speed. At the same time, the wire outlet pipes are movable, thereby being adaptable to pump bodies of various sizes.

[0017] 2. The present invention is designed with multiple air outlet rings and oblique air outlet pipes, so as to protect the welding position, provide support for the molten welding wire affected by gravity, and accelerate its cooling, thereby improving welding quality and efficiency.

[0018] 3. The present invention is designed with a slag collecting mechanism, which can shield the molten metal dripping during welding, so as to prevent it from falling into the inside of the pump body and causing defects inside the pump body, thereby affecting subsequent installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the structure provided by this application;

[0020] Figure 2 It is a structural schematic diagram of the welding mechanism provided in this application;

[0021] Figure 3 It is a structural schematic diagram of the fixing sleeve provided by the present application;

[0022] Figure 4 It is a schematic diagram of the structure of the air outlet ring provided by the present application;

[0023] Figure 5 It is a structural schematic diagram of the push disk provided by the present application;

[0024] Figure 6 It is a structural schematic diagram of the limit rod provided by the present application;

[0025] Figure 7 It is a schematic diagram of the structure of the limit block provided by this application;

[0026] In the figure:

[0027] 1. Base; 11. Turntable; 12. Gear ring;

[0028] 2. Mounting frame; 21. Motor; 22. Gear 1; 3. Telescopic rod 1;

[0029] 4. Welding mechanism; 41. Connecting frame; 42. Connecting platform; 421. Moving block; 43. Telescopic rod 2;

[0030] 44. Connect the trachea; 441. Fix the sleeve;

[0031] 45. gas distribution mechanism; 451. connecting pipe; 452. gas distribution plate; 453. gas distribution pipe; 454. mounting head; 455. gas outlet ring; 456. oblique gas outlet pipe; 457. limiting hole;

[0032] 46, wire outlet tube; 461, connecting sleeve; 462, connecting rod; 463, connecting plate;

[0033] 47, slag receiving mechanism; 471, moving rod; 472, slag receiving plate; 473, fixed rod; 474, spring 1; 475, gear 2; 476, rack; 477, push plate;

[0034] 478. Limit block; 4781. Insertion hole; 4782. Spring 2; 479. Limit rod. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 7 In this embodiment, a submersible pump motor stator end ring internal welding device is provided, comprising a base 1 and a mounting frame 2, a rotating table 11 is rotatably connected to the base 1, a telescopic rod 3 is installed at one end above the mounting frame 2, and a welding mechanism 4 for welding the end ring is installed below the telescopic rod 3;

[0037] The welding mechanism 4 includes a connecting frame 41, which is connected to the lower end of the telescopic rod 3, a connecting platform 42 is connected below the connecting frame 41, a connecting air pipe 44 is slidably connected above the connecting frame 41, the connecting air pipe 44 is communicated with the connecting platform 42 below, a plurality of wire outlet pipes 46 for wire feeding are slidably connected to the peripheral side of the connecting platform 42, and an air distribution mechanism 45 is connected below the connecting platform 42, the air distribution mechanism 45 includes a plurality of air distribution pipes 453, the air distribution pipes 453 are connected to the wire outlet pipe 46, one end of the air distribution pipe 453 is fixedly connected to a mounting head 454, an air outlet ring 455 is installed above the mounting head 454, one end of the wire outlet pipe 46 is located inside the air outlet ring 455, and a plurality of oblique air outlet pipes 456 are installed at one end of the mounting head 454, and the oblique air outlet pipes 456 are inclined upward toward the lower end of the wire outlet pipe 46;

[0038] A slag receiving mechanism 47 is slidably connected to the gas distribution pipe 453 , and the slag receiving mechanism 47 includes a slag receiving plate 472 , and the slag receiving plate 472 is located below the mounting head 454 .

[0039] During operation, the wire outlet tube 46 is installed with the existing wire feeding mechanism of gas shielded welding, and the connecting gas pipe 44 is connected with the existing gas supply mechanism, so that the shielding gas enters the welding mechanism 4 through the connecting gas pipe 44, and the workpiece to be processed is placed on the rotating table 11, and the workpiece is clamped by the existing clamping mechanism, and the welding mechanism 4 is lowered and extended into the interior of the workpiece to be processed by extending the telescopic rod 3 to perform welding work.

[0040] When the welding mechanism 4 extends into the workpiece to be processed, it moves away from the center to the welding position for welding through multiple wire outlet tubes 46 at the same time. By moving away from the center at the same time through the wire outlet tubes 46, it can be suitable for welding end rings of various different diameters. During welding, a ring-shaped airflow is sprayed through the air outlet ring 455 to form a protective cover at the welding position to improve the welding quality. The inclined air outlet pipe 456 is inserted into the protective cover to form an upward supporting airflow, thereby ensuring that when the welding wire melts, the upward supporting force is increased to prevent the molten metal from being moved away from the position for connection and fixing under the action of gravity. At the same time, the airflow accelerates the cooling rate of the molten metal and improves the welding speed.

[0041] At the same time, during welding, the slag collecting mechanism 47 is used to collect the dripping molten metal that still appears during welding, so as to prevent the molten metal from dripping into the inside of the workpiece and causing internal defects of the workpiece.

[0042] In this embodiment, please refer to Figure 1 Specifically, a gear ring 12 is fixedly connected to the rotating table 11, a motor 21 is installed on one side of the lower end of the mounting frame 2 close to the base 1, and a gear 22 is fixedly connected below the motor 21, and the gear 22 is meshed with the gear ring 12.

[0043] The motor 21 is started to drive the gear 22 to rotate, the gear 22 rotates to drive the gear ring 12 to rotate, the gear ring 12 rotates to drive the rotating table 11 to rotate, the rotating table 11 rotates to rotate the workpiece above, so that the welding mechanism 4 can weld the stator end ring for one circle.

[0044] In this embodiment, please refer to Figures 2-3 Specifically, a telescopic rod 43 is fixedly connected to the upper part of the lower end of the connecting frame 41, and the telescopic rod 43 is fixedly connected to the upper end of the connecting air pipe 44. The lower end of the connecting air pipe 44 is inserted into the connecting platform 42, and a fixed sleeve 441 is fixedly connected to the outer side of the connecting air pipe 44 below the connecting frame 41. A connecting sleeve 461 is fixedly connected to the outer side of the upper end of the wire outlet tube 46, and a connecting rod 462 is connected between the connecting sleeve 461 and the fixed sleeve 441. A plurality of moving blocks 421 are slidably connected to the peripheral side of the connecting platform 42, and the wire outlet tube 46 passes through one end of the moving block 421.

[0045] By shortening the telescopic rod 43, the telescopic rod 43 shortens, thereby driving the connecting air pipe 44 to descend, and the lower end of the connecting air pipe 44 continues to be inserted into the connecting platform 42, and the fixed sleeve 441 on the outside of the connecting air pipe 44 descends accordingly. After the fixed sleeve 441 descends, the connecting sleeve 461 is pushed to move by the connecting rod 462, and the connecting sleeve 461 moves, thereby pushing the connecting sleeve 461 to move to a position away from the center of the connecting platform 42, and the connecting sleeve 461 moves, thereby driving the wire outlet tube 46 to move, and the wire outlet tube 46 moves close to the welding position inside the workpiece, so that the workpiece can be welded.

[0046] In this embodiment, please refer to Figures 3-4 Specifically, the gas distribution mechanism 45 includes a gas distribution disk 452, the upper end of the gas distribution disk 452 is fixedly connected to a connecting pipe 451, the upper end of the connecting pipe 451 is inserted into the interior of the connecting platform 42 and communicates with the connecting platform 42, a plurality of gas distribution pipes 453 are inserted into the peripheral side of the gas distribution disk 452, and a connecting plate 463 is connected between the wire outlet pipe 46 and the gas distribution pipe 453.

[0047] The inside of the gas distribution plate 452 is hollow, and the gas distribution plate 452 is connected to the inside of the upper connecting platform 42 through the connecting pipe 451. The protective gas enters the inside of the connecting platform 42 through the connecting air pipe 44, and then enters the inside of the gas distribution plate 452 from the connecting platform 42 through the connecting pipe 451. The inside of the gas distribution plate 452 enters the inside of each installation head 454 through the inside of the gas distribution pipe 453 on the peripheral side, and is discharged through the gas outlet ring 455 and the oblique gas outlet pipe 456. During the movement of the wire outlet pipe 46, the gas distribution pipe 453 is driven to move together through the connecting plate 463 to ensure that the gas outlet ring 455 and the oblique gas outlet pipe 456 are always located outside the port of the wire outlet pipe 46.

[0048] In this embodiment, please refer to Figure 5 Specifically, the slag receiving mechanism 47 includes a moving rod 471, which is slidably connected to the outside of the gas distribution pipe 453, and a slag receiving plate 472 is fixedly connected to the lower end of the moving rod 471. A fixed rod 473 is fixedly connected to one side of the upper end of the mounting head 454, and the fixed rod 473 passes through the upper end of the moving rod 471. A spring 474 is provided on the outside of the fixed rod 473, and the spring 474 is located on one side of the moving rod 471. One end of the slag receiving plate 472 can be aligned up and down with one end of the mounting head 454.

[0049] The welding wire needs to be debugged during the welding process. After the welding wire melts, it will slide down due to gravity. It needs to be debugged by controlling the welding parameters and welding technology to ensure that the molten metal droplets smoothly transition to the molten pool to form a high-quality weld. The slag plate 472 can shield the welding position to prevent the molten metal from dripping onto the workpiece. When the slag plate 472 descends with the gas distribution pipe 453, the hole it can pass through is no larger than the space required by the mounting head 454, ensuring that it will not limit the processed workpiece.

[0050] In this embodiment, please refer to Figures 5-6 Specifically, a gear 2 475 is rotatably connected to the lower part of the gas distribution pipe 453, a push plate 477 is fixedly connected to the lower end of the gear 2 475, the push plate 477 is located on one side of the slag receiving plate 472, and a rack 476 is fixedly connected to the lower part of the gas distribution plate 452, one end of the rack 476 is located on one side of the gear 2 475, and the rack 476 is meshed with the gear 2 475.

[0051] When the wire outlet tube 46 is moved by shortening the telescopic rod 2 43, the gas distribution tube 453 drives the gear 2 475 away from the gas distribution plate 452. After the movement, the gear 2 475 is restricted by the rack 476 and is driven to rotate. The rotation of the gear 2 475 drives the push plate 477 to rotate. The rotation of the push plate 477 drives the moving rod 471 to move along the gas distribution tube 453. The moving rod 471 drives the slag receiving plate 472 to move. One end of the slag receiving plate 472 exceeds the position of the mounting head 454 to ensure that the welding position is fully blocked.

[0052] In this embodiment, please refer to Figures 5 to 7 Specifically, a limiting block 478 is inserted into one side of the moving rod 471, a limiting hole 457 is provided on the side of one end of the gas distribution pipe 453, one end of the limiting block 478 can be inserted into the limiting hole 457, and an insertion hole 4781 is provided at the other end of the limiting block 478, one end of the insertion hole 4781 is provided with an inclined surface, and a spring 4782 is connected between the upper end of the insertion hole 4781 and the upper end of the moving rod 471, and a limiting rod 479 is fixedly connected to one side of the gas distribution plate 452, one end of the limiting rod 479 is an inclined surface, and one end of the limiting rod 479 is inserted into the insertion hole 4781 and passes through the limiting block 478.

[0053] The limit block 478 moves together with the moving rod 471. When the limit block 478 moves to the position of the limit hole 457, the spring 2 4782 pulls one end of the limit block 478 to insert into the interior of the limit hole 457, thereby ensuring that the slag receiving plate 472 is always located at one end of the gas distribution pipe 453 for blocking, and preventing the slag receiving plate 472 from resetting under the action of the fixed rod 473 after the gear 2 475 loses the restriction of the rack 476.

[0054] When the gas distribution pipe 453 is recovered, the inclined surface at one end of the insertion hole 4781 contacts the inclined surface at one end of the limiting rod 479, and the insertion hole 4781 is moved outward through the limiting rod 479, and the limiting block 478 is moved outward accordingly, so that the limiting block 478 is removed from the limiting hole 457, and the slag plate 472 can be reset under the action of the fixing rod 473, so as to facilitate the subsequent insertion into the new workpiece.

[0055] In this embodiment, specifically, one end of the slag receiving plate 472 is arc-shaped and elastic, and the bottom surface of the slag receiving plate 472 is made of an elastic high-temperature resistant material.

[0056] When the slag receiving plate 472 contacts the inner side of the workpiece, the slag receiving plate 472 is deformed so as to fit more closely to the inner side of the workpiece, thereby maximizing the receiving range.

[0057] In this embodiment, specifically, the centers of the connecting platform 42 and the gas distribution mechanism 45 and the center of the rotating platform 11 are located on the same vertical line.

[0058] When installing and fixing the workpiece, ensure that the center of the workpiece and the center of the rotating table 11 are on the same vertical line. When welding, ensure that the center of the connecting table 42 and the center of the workpiece are on the same vertical line. After the multiple wire outlet tubes 46 are away from the center of the connecting table 42, the wire outlet tubes 46 can be at the same distance from the inner side of the workpiece, thereby ensuring that the working conditions of multiple welding positions are consistent during welding.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A submersible pump motor stator end ring internal welding device, comprising a base (1) and a mounting frame (2), characterized in that: The base (1) is rotatably connected to a rotating platform (11); a telescopic rod (3) is mounted on one end above the mounting frame (2); and a welding mechanism (4) for welding the end ring is mounted below the telescopic rod (3); The welding mechanism (4) comprises a connecting frame (41), the connecting frame (41) being connected to the lower end of the telescopic rod (3), a connecting platform (42) being connected below the connecting frame (41), a connecting air pipe (44) being slidably connected above the connecting frame (41), the connecting air pipe (44) being connected to the connecting platform (42) below, a plurality of wire outlet pipes (46) for wire feeding being slidably connected to the peripheral side of the connecting platform (42), an air distribution mechanism (45) being connected below the connecting platform (42), and an air distribution mechanism (45) being connected to the connecting platform (42). The mechanism (45) comprises a plurality of air distribution pipes (453), the air distribution pipes (453) being connected to the wire outlet pipe (46), one end of the air distribution pipe (453) being fixedly connected to a mounting head (454), an air outlet ring (455) being mounted above the mounting head (454), one end of the wire outlet pipe (46) being located inside the air outlet ring (455), one end of the mounting head (454) being mounted with a plurality of oblique air outlet pipes (456), the oblique air outlet pipes (456) being inclined upward toward the lower side of one end of the wire outlet pipe (46); The gas distribution pipe (453) is slidably connected to a slag receiving mechanism (47), the slag receiving mechanism (47) comprising a slag receiving plate (472), and the slag receiving plate (472) is located below the mounting head (454).

2. The internal welding device of the stator end ring of a submersible pump motor according to claim 1, characterized in that: A gear ring (12) is fixedly connected to the rotating platform (11); a motor (21) is installed on one side of the lower end of the mounting frame (2) close to the base (1); a gear one (22) is fixedly connected below the motor (21); and the gear one (22) meshes with the gear ring (12).

3. The internal welding device of the stator end ring of a submersible pump motor according to claim 1, characterized in that: A second telescopic rod (43) is fixedly connected above the lower end of the connecting frame (41); the second telescopic rod (43) is fixedly connected to the upper end of the connecting air pipe (44); the lower end of the connecting air pipe (44) is inserted into the interior of the connecting platform (42); the outer side of the connecting air pipe (44) is fixedly connected to a fixing sleeve (441) located below the connecting frame (41); the outer side of the upper end of the wire outlet tube (46) is fixedly connected to a connecting sleeve (461); a connecting rod (462) is connected between the connecting sleeve (461) and the fixing sleeve (441); a plurality of moving blocks (421) are slidably connected to the peripheral side of the connecting platform (42); the wire outlet tube (46) passes through one end of the moving block (421).

4. The internal welding device of the stator end ring of a submersible pump motor according to claim 3, characterized in that: The gas distribution mechanism (45) comprises a gas distribution disk (452), the upper end of the gas distribution disk (452) is fixedly connected to a connecting pipe (451), the upper end of the connecting pipe (451) is inserted into the interior of the connecting platform (42) and communicates with the connecting platform (42), a plurality of gas distribution pipes (453) are inserted into the peripheral side of the gas distribution disk (452), and a connecting plate (463) is connected between the wire outlet pipe (46) and the gas distribution pipe (453).

5. The internal welding device of the stator end ring of a submersible pump motor according to claim 4, characterized in that: The slag receiving mechanism (47) comprises a moving rod (471), the moving rod (471) is slidably connected to the outside of the gas distribution pipe (453), the slag receiving plate (472) is fixedly connected to the lower end of the moving rod (471), one side of the upper end of the mounting head (454) is fixedly connected to a fixing rod (473), the fixing rod (473) passes through the upper end of the moving rod (471), a spring (474) is provided on the outside of the fixing rod (473), the spring (474) is located on one side of the moving rod (471), and one end of the slag receiving plate (472) can be aligned with one end of the mounting head (454) in the vertical direction.

6. The internal welding device of the stator end ring of a submersible pump motor according to claim 5, characterized in that: A second gear (475) is rotatably connected below the gas distribution pipe (453), a push plate (477) is fixedly connected to the lower end of the second gear (475), the push plate (477) is located on one side of the slag receiving plate (472), a rack (476) is fixedly connected below the gas distribution plate (452), one end of the rack (476) is located on one side of the second gear (475), and the rack (476) is meshed with the second gear (475).

7. The internal welding device of the stator end ring of a submersible pump motor according to claim 6, characterized in that: One side of the moving rod (471) is inserted into a limiting block (478), a limiting hole (457) is provided on the side of one end of the gas distribution pipe (453), one end of the limiting block (478) can be inserted into the limiting hole (457), the other end of the limiting block (478) is provided with an insertion hole (4781), one end of the insertion hole (4781) is provided with an inclined surface, a second spring (4782) is connected between the upper end of the insertion hole (4781) and the upper end of the moving rod (471), one side of the gas distribution plate (452) is fixedly connected to a limiting rod (479), one end of the limiting rod (479) is inclined, and one end of the limiting rod (479) is inserted into the insertion hole (4781) and passes through the limiting block (478).

8. The internal welding device of the stator end ring of a submersible pump motor according to claim 5, characterized in that: One end of the slag receiving plate (472) is arc-shaped and elastic, and the bottom surface of the slag receiving plate (472) is made of elastic high-temperature resistant material.

9. The internal welding device of the stator end ring of a submersible pump motor according to claim 1, characterized in that: The centers of the connecting platform (42) and the gas distribution mechanism (45) are located on the same vertical line as the center of the rotating platform (11).

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