Welding device for boiler barrel welding

Abstract

The utility model discloses a welding device for boiler barrel welding, and relates to the technical field of machines for boiler barrel welding. The boiler barrel welding device comprises a welding platform, the top of the welding platform is slidably connected with a boiler barrel welding seat, the boiler barrel welding seat comprises a first sliding seat and a second sliding seat, the second sliding seat is arranged on the rear side of the first sliding seat, the first sliding seat is rotatably connected with a screw rod through a bearing, and the front end of the screw rod is screwed into the second sliding seat in a threaded mode. The rear end of the screw extends to the outside of the first sliding seat and is fixedly sleeved with a rotating disc. The hydraulic cylinder drives the positioning column to move downwards, so that the conical part is inserted into the heat exchange tube to be welded and can be matched with the boiler barrel welding seat to effectively limit and fix the boiler barrel, the welding mechanical arm can stably weld the heat exchange tube, the welding quality can be better guaranteed, and the welding efficiency is improved. The second sliding seat can be driven to move along the connecting sliding groove by rotating the screw rod, the distance between the first sliding seat and the second sliding seat is adjusted, welding of boiler barrels of different lengths can be met, and the applicability is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of machines for boiler drum welding, in particular to a welding device for boiler drum welding. Background Art

[0002] The boiler drum is a cylindrical pressure vessel used for steam-water separation and steam purification in a water tube boiler, forming a water circulation loop and storing boiler water. The boiler drum is mainly composed of two rigid cylinders with a radius of 0.5m to 1.2m and thousands of heat exchange tubes with a radius of 44mm to 55mm. During the operation of the boiler drum, the pressure inside the tube will reach 1.0Mpa to 4.0Mpa, so after the boiler drum and the heat exchange tube are welded, the connection between the boiler drum and the heat exchange tube must be completely sealed, so it is necessary to perform circumferential welding along the outer wall of the heat exchange tube in the boiler drum. After searching, the patent with application number 202320058551.8 discloses a welding device for boiler drum welding, including a crawling frame, a positioning device and a welding device; the crawling frame includes a support frame, a track and a crawling vehicle; the support frame is arranged in the boiler drum, the track is arranged on the support frame, the crawling vehicle is slidably arranged on the track, the moving direction of the crawling vehicle is parallel to the axis of the boiler drum, and the crawling vehicle is provided with a first motor; the positioning device is transmission-connected to the output end of the first motor, the positioning device rotates along the circumferential direction of the boiler drum, and the positioning device has a positioning shaft that can be inserted into the heat exchange tube on the boiler drum; the welding device includes a welding gun, and the welding gun has an active trajectory that moves circumferentially around the positioning shaft.

[0003] However, during actual use, the applicant found that during the welding of the heat exchange tubes on the boiler drum, since the guide tube and the first mounting shell were movably connected through a universal joint, the first mounting shell was not stable enough during the welding process, thereby failing to ensure stable welding of the welding gun. In view of this, we propose a welding device for boiler drum welding. Utility Model Content

[0004] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0005] The utility model relates to a welding device for drum welding, which comprises a welding platform. A drum welding seat is slidably connected to the top of the welding platform. The drum welding seat includes a first sliding seat and a second sliding seat. The second sliding seat is arranged at the rear side of the first sliding seat. A screw rod is rotatably connected to the first sliding seat through a bearing. The front end of the screw rod is screwed into the second sliding seat. The rear end of the screw rod extends to the outside of the first sliding seat and is sleeved and fixed with a turntable. Arc-shaped placement grooves are symmetrically arranged at the top of the drum welding seat. Rollers are rotatably connected to the arc-shaped placement grooves through wheel axles. Arc-shaped limiting baffles are symmetrically and fixedly connected to the front and rear sides of the drum welding seat. An L-shaped support frame is fixedly connected to the front side of the welding platform. A hydraulic cylinder is fixedly arranged at the top of the upper end of the L-shaped support frame. The telescopic end of the hydraulic cylinder movably penetrates through the upper end of the L-shaped support frame and is fixedly connected with a positioning column. A rotating seat is movably sleeved on the positioning column through a bearing. A toothed ring is fixedly connected to the top of the rotating seat. A motor is fixedly arranged on the side wall of the positioning column above the rotating seat. A gear is sleeved and fixed on the rotating end of the motor. The gear is meshed with the toothed ring. A welding robot arm is fixedly connected to the side wall of the rotating seat.

[0006] Preferably, connecting sliding grooves are symmetrically formed on both sides of the welding platform.

[0007] Preferably, connecting sliding blocks are symmetrically arranged at the lower part of the drum welding seat, and the connecting sliding blocks slide along the connecting sliding grooves.

[0008] Preferably, a plurality of rollers on the arc-shaped placement grooves are uniformly arranged along the arc-shaped placement grooves.

[0009] Preferably, the inner side wall of the arc-shaped limiting baffle is higher than the groove wall of the arc-shaped placement groove.

[0010] Preferably, a conical part is arranged at the lower end of the positioning column.

[0011] The utility model has the following beneficial effects:

[0012] The welding device for drum welding of the utility model drives the positioning column to move downward through the hydraulic cylinder, so that the conical part is inserted into the heat exchange tube to be welded, which can effectively limit and fix the drum in cooperation with the drum welding seat, so that the welding robot arm can stably weld the heat exchange tube, better ensuring the welding quality. By rotating the screw rod, the second sliding seat can be driven to move along the connecting sliding groove, adjusting the distance between the first sliding seat and the second sliding seat, and further adjusting the length of the drum welding seat, so that the drum welding seat can adapt to drums of different lengths, meeting the welding requirements of drums of different lengths and having stronger applicability. Description of the Drawings

[0013] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the attached drawings required for the description of the embodiments. Obviously, the attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can be obtained based on these drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure of a welding device for drum welding of the present utility model;

[0015] Figure 2 It is a welding device for drum welding of the present utility model Figure 1 The enlarged view of the structure at A in it;

[0016] Figure 3 It is a schematic diagram of the structure of the drum welding seat in a welding device for drum welding of the present utility model;

[0017] Figure 4 It is a schematic diagram of the structure when welding a drum with a welding device for drum welding of the present utility model.

[0018] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0019] 1. Welding platform; 11. Connecting chute; 2. Drum welding seat; 21. Slide seat one; 22. Slide seat two; 23. Arc-shaped placement groove; 24. Roller; 25. Arc-shaped limit baffle; 26. Screw; 27. Turntable; 28. Connecting slider; 3. L-shaped support frame; 4. Hydraulic cylinder; 5. Positioning column; 51. Tapered part; 6. Rotating seat; 61. Tooth ring; 7. Motor; 71. Gear; 8. Welding manipulator. Specific embodiments

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0021] Please refer to Figures 1-4 As shown, the present utility model provides a technical solution:

[0022] A welding device for drum welding, comprising a welding platform 1. A drum welding seat 2 is slidably connected to the top of the welding platform 1. The drum welding seat 2 includes a first sliding seat 21 and a second sliding seat 22. The second sliding seat 22 is arranged at the rear side of the first sliding seat 21. A screw rod 26 is rotatably connected to the first sliding seat 21 through a bearing. The front end of the screw rod 26 is screwed into the second sliding seat 22. The rear end of the screw rod 26 extends to the outside of the first sliding seat 21 and is sleeved and fixed with a turntable 27. Arc-shaped placement grooves 23 are symmetrically arranged on the top of the drum welding seat 2. A roller 24 is rotatably connected to the arc-shaped placement groove 23 through a wheel shaft. A plurality of rollers 24 are evenly arranged along the arc-shaped placement groove 23 on the arc-shaped placement groove 23. The arrangement of the rollers 24 enables the drum to rotate on the arc-shaped placement groove 23. Arc-shaped limiting baffles 25 are symmetrically and fixedly connected to the front and rear sides of the drum welding seat 2. The inner side wall of the arc-shaped limiting baffle 25 is higher than the groove wall of the arc-shaped placement groove 23. The arrangement of the arc-shaped limiting baffles 25 is used to limit the two ends of the drum. Connecting chutes 11 are symmetrically opened on both sides of the welding platform 1. Connecting sliders 28 are symmetrically arranged at the lower part of the drum welding seat 2. The connecting sliders 28 slide along the connecting chutes 11 to realize the guiding movement of the drum welding seat 2. By rotating the screw rod 26, the second sliding seat 22 can be driven to move along the connecting chute 11 to adjust the distance between the first sliding seat 21 and the second sliding seat 22, and further the length of the drum welding seat 2 can be adjusted, so that the drum welding seat 2 can adapt to drums of different lengths and meet the welding of drums of different lengths, with stronger applicability. When welding the drum, the length of the drum welding seat 2 can be adjusted according to the length of the drum to be welded. When adjusting the length of the drum welding seat 2, the turntable 27 can be manually rotated to drive the screw rod 26 to rotate. The rotation of the screw rod 26 can drive the second sliding seat 22 to move along the connecting chute 11 to adjust the distance between the first sliding seat 21 and the second sliding seat 22, and further the length of the drum welding seat 2 can be adjusted to make the length of the drum welding seat 2 adapt to the length of the drum. The two ends of the drum to be welded can be respectively placed on the arc-shaped placement grooves 23 on both sides, and the two ends of the drum can be limited by the arc-shaped limiting baffles 25.

[0023] The front side of the welding platform 1 is fixedly connected with an L-shaped support frame 3. At the top of the upper end of the L-shaped support frame 3, a hydraulic cylinder 4 is fixedly installed. The telescopic end of the hydraulic cylinder 4 movably penetrates through the upper end of the L-shaped support frame 3 and is fixedly connected with a positioning column 5. At the lower end of the positioning column 5, a conical portion 51 is provided. A rotating seat 6 is movably sleeved on the positioning column 5 through a bearing. At the top of the rotating seat 6, a gear ring 61 is fixedly connected. On the side wall of the positioning column 5 above the rotating seat 6, a motor 7 is fixedly installed. A gear 71 is fixedly sleeved on the rotating end of the motor 7. The gear 71 is meshed with the gear ring 61. On the side wall of the rotating seat 6, a welding robotic arm 8 is fixedly connected. By driving the positioning column 5 to move downward through the hydraulic cylinder 4, the conical portion 51 is inserted into the heat exchange tube to be welded, which can effectively limit and fix the drum in cooperation with the drum welding seat 2, so that the welding robotic arm 8 can stably weld the heat exchange tube, and can better ensure the welding quality. The hydraulic cylinder 4, the motor 7 and the welding robotic arm 8 are all controlled by an external controller. This control structure and control method do not belong to the essential technical features of the present invention and will not be described in detail here. The welding robotic arm 8 is an existing technology on the market and will not be described in detail here. After the drum is placed on the drum welding seat 2 and before welding the drum, the staff can push the drum to adjust the position of the drum in the front-back direction through the drum welding seat 2, and can rotate the drum through the rollers 24 to rotate the drum, so that the heat exchange tube to be welded can be moved and adjusted to directly below the positioning column 5. At this time, the hydraulic cylinder 4 can be driven to drive the positioning column 5 to move downward, so that the conical portion 51 is inserted into the heat exchange tube to be welded, and the drum can be limited and fixed by the positioning column 5. At this time, the heat exchange tube can be welded by the welding robotic arm 8. During the welding process, the motor 7 can drive the gear 71 to rotate. The rotation of the gear 71 can drive the gear ring 61 and the rotating seat 6 to rotate together. The rotation of the rotating seat 6 can drive the welding robotic arm 8 to rotate around the positioning column 5 to realize the welding of the heat exchange tube. After one heat exchange tube is welded, the hydraulic cylinder 4 can drive the positioning column 5 and the welding robotic arm 8 to move upward and reset. At this time, the next heat exchange tube to be welded can be moved to directly below the positioning column 5, and the above operation can be repeated to complete the welding of each heat exchange tube on the drum one by one.

[0024] Working principle: When in use, during the welding of the drum, the length of the drum welding seat 2 can be adjusted according to the length of the drum to be welded. When adjusting the length of the drum welding seat 2, the turntable 27 can be manually rotated to drive the screw rod 26 to rotate. The rotation of the screw rod 26 can drive the second sliding seat 22 to move along the connecting sliding groove 11, adjust the distance between the first sliding seat 21 and the second sliding seat 22, and thus adjust the length of the drum welding seat 2 so that the length of the drum welding seat 2 can adapt to the length of the drum. The two ends of the drum to be welded can be respectively placed on the arc-shaped placement grooves 23 on both sides, and the two ends of the drum can be limited by the arc-shaped limiting baffle 25. After the drum is placed on the drum welding seat 2 and before welding the drum, the operator can push the drum to adjust the position of the drum in the front-back direction through the drum welding seat 2, and can rotate the drum to make the drum rotate through the rollers 24, so as to move and adjust the heat exchange tube to be welded to directly below the positioning column 5. At this time, the hydraulic cylinder 4 can be driven to drive the positioning column 5 to move downward, so that the conical part 51 is inserted into the heat exchange tube to be welded, and the drum can be limited and fixed by the positioning column 5. At this time, the heat exchange tube can be welded by the welding robot arm 8. During the welding process, the motor 7 can drive the gear 71 to rotate, the rotation of the gear 71 can drive the toothed ring 61 and the rotating seat 6 to rotate together, and the rotation of the rotating seat 6 can drive the welding robot arm 8 to rotate around the positioning column 5 to realize the welding of the heat exchange tube. After one heat exchange tube is welded, the hydraulic cylinder 4 can drive the positioning column 5 and the welding robot arm 8 to move upward and reset. At this time, the next heat exchange tube to be welded can be moved to directly below the positioning column 5, and the above operations can be repeated to complete the welding of the heat exchange tubes on the drum one by one.

[0025] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0026] The above are only the preferred embodiments of the present invention and do not limit the present invention. Any modification of the technical solutions recorded in the foregoing embodiments and any equivalent replacement of some technical features thereof all fall within the protection scope of the present invention.

Claims

1. A welding device for drum welding, comprising a welding platform (1), characterized in that: The top of the welding platform (1) is slidably connected to a drum welding seat (2), the drum welding seat (2) comprising a slide seat 1 (21) and a slide seat 2 (22), the slide seat 2 (22) being arranged at the rear side of the slide seat 1 (21), the slide seat 1 (21) being rotatably connected to a screw rod (26) via a bearing, the front end of the screw rod (26) being threadedly screwed into the slide seat 2 (22), the rear end of the screw rod (26) extending to the outside of the slide seat 1 (21) and being sleeved and fixed with a turntable (27), the top of the drum welding seat (2) being symmetrically provided with an arc-shaped placement groove (23), the arc-shaped placement groove (23) being rotatably connected to a roller (24) via a wheel shaft, and the front and rear sides of the drum welding seat (2) being symmetrically fixedly connected to an arc-shaped limit stopper The plate (25) is fixedly connected to an L-shaped support frame (3) on the front side of the welding platform (1), a hydraulic cylinder (4) is fixedly installed on the top of the upper end of the L-shaped support frame (3), the telescopic end of the hydraulic cylinder (4) movably passes through the upper end of the L-shaped support frame (3) and is fixedly connected to a positioning column (5), a rotating seat (6) is movably sleeved on the positioning column (5) through a bearing, a gear ring (61) is fixedly connected to the top of the rotating seat (6), a motor (7) is fixedly installed on the side wall of the positioning column (5) above the rotating seat (6), a gear (71) is sleeved and fixed on the rotating end of the motor (7), the gear (71) is meshed and connected with the gear ring (61), and a welding mechanical arm (8) is fixedly connected to the side wall of the rotating seat (6).

2. A welding device for drum welding according to claim 1, characterized in that: Connecting slide grooves (11) are symmetrically provided on both sides of the welding platform (1).

3. A welding device for drum welding according to claim 2, characterized in that: A connecting slide block (28) is symmetrically arranged at the lower part of the drum welding seat (2), and the connecting slide block (28) slides along the connecting slide groove (11).

4. A welding device for drum welding according to claim 1, characterized in that: A plurality of rollers (24) on the arc-shaped placement groove (23) are evenly arranged along the arc-shaped placement groove (23).

5. The welding device for drum welding according to claim 1, characterized in that: The inner side wall of the arc-shaped limiting baffle (25) is higher than the groove wall of the arc-shaped placement groove (23).

6. A welding device for drum welding according to claim 1, characterized in that: The lower end of the positioning column (5) is provided with a tapered portion (51).

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