A special welding equipment for annular weld

Abstract

The present invention belongs to the field of welding technology, and discloses a special welding device for annular welds, including a welding base, mounting frames are fixedly connected on both sides of the welding base, a mounting block is fixedly connected on the top of the welding base, a limiting sleeve is fixedly connected to the middle section of the bottom of the mounting frame, and a push rod is slidably connected inside the limiting sleeve. The present invention drives the push rod to rotate by rotating the rotating shaft, and the push rod rotates to push the push rod to move and push the first card block out of the limiting card slot. When the push rod continues to rotate and disengages from the push rod, the first card block will cooperate with the short slot of the limiting card slot due to gravity and the elastic force of the spring. Due to the cooperation between the first card block and the limiting card slot, the distance between the welding gun and the weld becomes longer, and the weld is welded again to achieve layered welding, thereby improving the welding speed and the filling rate of the weld, thereby improving the mechanical properties of the weld and enhancing its corrosion resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to special welding equipment for annular welds. Background Art

[0002] Circular weld welding is a common welding method in pipes, containers or other circular cross-section components. It is mainly used to connect the ends of two circular cross-sections to form a continuous circular joint. This welding method is widely used in the petroleum, chemical, natural gas, food, pharmaceutical and other industries because it can provide high strength and sealing to ensure the safe transmission of the medium. The welding methods of circular weld welding are usually manual arc welding, gas shielded welding, submerged arc welding and resistance welding.

[0003] However, the existing special welding equipment for annular welds often has some problems in actual use: most of the existing annular welding equipment welds the annular weld once, and the weld depth cannot be adjusted during welding. When annular metal parts with deeper welding grooves are required, they will be greatly limited. When welding, only one welding can be performed, which may result in the inability to completely eliminate welding defects such as pores and slag inclusions during welding, which may cause poor welding effects and product quality that does not meet the requirements. Secondly, the existing welding equipment may not preheat the welded parts well during welding, which will also result in poor welding effects, affect the welding quality, and cause problems in the welding process, thereby causing production delays. Summary of the invention

[0004] The object of the present invention is to provide a special welding device for annular welds to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a special welding device for annular welds, comprising a welding base, mounting frames are fixedly connected on both sides of the welding base, a mounting block is fixedly connected on the top of the welding base, a limiting sleeve is fixedly connected to the middle section of the bottom of the mounting frame, a push rod is slidably connected inside the limiting sleeve, a first limiting ring is fixedly connected to the outside of the push rod, a limiting slider is fixedly connected to the outside of the push rod, a fixed sleeve is slidably connected to the outside of the push rod, the fixed sleeve is fixedly connected to the welding base, a plurality of sliding grooves are arranged inside the fixed sleeve, and the sliding grooves are arranged corresponding to the limiting slider , a plurality of limit slots are provided on the outside of the fixed sleeve, and the plurality of limit slots correspond to each other in an staggered manner, a sliding rod is provided on the top of the fixed sleeve, a first clamping block is fixedly connected to the outside of one end of the sliding rod, a second limit ring is fixedly connected to the outside of the sliding rod, a spring is provided at one end of the second limit ring, one end of the spring is fixedly connected to the mounting bracket, a connecting plate is provided on the top of the first clamping block, the connecting plate is fixedly connected to the sliding rod, a welding gun is slidably connected to the inside of the mounting bracket, the welding gun is fixedly connected to the connecting plate, a rotating assembly is provided inside the mounting block, and a preheating assembly is provided on one side of the top of the welding base.

[0006] Preferably, the rotating assembly includes a mounting base, the mounting base is fixedly connected to the welding base, a driving motor is fixedly connected to the top of the mounting base, the output end of the driving motor is fixedly connected to a rotating shaft, the rotating shaft is rotatably connected to the welding base, a first gear is fixedly connected to the outer side of the rotating shaft, a rotating groove is opened inside the mounting block, a gear block is arranged inside the rotating groove, the gear block is meshed with the first gear, limiting plates are fixedly connected on both sides of the gear block, an annular groove is opened inside the gear block corresponding to the limiting plate, and the limiting plate is slidably connected to the inside of the annular groove.

[0007] Preferably, the rotating assembly further comprises two second clamping blocks, the two second clamping blocks are respectively fixedly connected to two sides of the middle of the limiting plate, welding parts are clamped in the middle of the two second clamping blocks, and a push rod is arranged at the opening of the gear block.

[0008] Preferably, the preheating assembly includes a pipeline, the pipeline is fixedly connected to one side of the top of the welding base, one end of the pipeline is fixedly connected to a connecting plate, a plurality of flame nozzles are fixedly connected to the outer side of the connecting plate, and the position of the flame nozzles corresponds to the welding gun.

[0009] Preferably, one end of the push rod is serrated, the diameter of the sliding rod is smaller than the diameter of the push rod, the number of serrations at one end of the push rod is twice the number of limit slots, the diameter of the first block is equal to the diameter of the fixed sleeve, and the diameter of the sliding rod is smaller than the diameter of the push rod.

[0010] Preferably, the outer contour shape of the limiting sleeve corresponds to that of the push rod, the first limiting ring is slidably connected to the interior of the limiting sleeve, and the bottom diameter of the limiting sleeve is equal to the diameter of the push rod.

[0011] Preferably, the push rod is arranged correspondingly to the push rod, the outer length of the gear block at the extension of the push rod is smaller than the diameter length of the rotating groove, the center point of the welded part coincides with the center point of the gear block, and the second clamping block is arranged correspondingly to the center point.

[0012] Preferably, the connecting plate is arranged at the center of the welding piece, and the distances from the plurality of blast holes to the welding piece are equal.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. The present invention drives the push rod to rotate by rotating the rotating shaft. The rotation of the push rod will push the push rod to move and push the first clamping block out of the limiting clamping groove. After one end of the first clamping block is subjected to the elastic force of the spring, its tooth surface contacts the first clamping block, and the first clamping block will rotate along one side of the tooth edge. When the push rod continues to rotate to disengage from the cooperation with the push rod, the first clamping block will cooperate with the short groove of the limiting clamping groove again due to gravity and the elastic force of the spring. However, since it has rotated a certain angle, it will cooperate with the short groove of the limiting clamping groove. Due to the cooperation between the first clamping block and the limiting clamping groove, the distance between the welding gun and the welded part becomes longer, and the welded part is welded again to realize layered welding, which can improve the welding speed and the filling rate of the weld, reduce the generation of welding defects such as pores and cracks, thereby improving the mechanical properties of the weld and enhancing its corrosion resistance.

[0015] 2. The present invention allows combustible gas to be introduced into the interior of the pipeline. After the gas enters the interior of the connecting plate through the pipeline, it is ignited through the flame nozzle and then sprays out flames to heat the interior of the weldment for preheating. At this time, the drive motor is started, and the drive motor starts to drive the weldment to rotate. The rotation of the weldment enables the flame to better preheat the weldment, thereby uniformly preheating the weldment as a whole, reducing the temperature difference between the welded workpieces in the welding area, reducing welding stress, improving weld quality, making the welding process smoother, and reducing production delays caused by welding problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the overall rear view structure of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the gear block of the present invention;

[0019] Figure 4 is a cross-sectional view of the mounting frame of the present invention;

[0020] Figure 5 For the present invention Figure 4 A magnified view of the structure at center;

[0021] Figure 6 It is a structural schematic diagram of the fixed sliding sleeve of the present invention;

[0022] Figure 7 It is a structural schematic diagram of the first card block of the present invention;

[0023] Figure 8 It is a structural schematic diagram of the connection disk of the present invention.

[0024] In the figure: 1. welding base; 2. mounting frame; 3. mounting block; 4. limiting sleeve; 5. push rod; 6. first limiting ring; 7. limiting slider; 8. fixed sleeve; 9. limiting slot; 10. sliding rod; 11. first clamping block; 12. second limiting ring; 13. spring; 14. connecting plate; 15. welding gun; 16. mounting base; 17. driving motor; 18. rotating shaft; 19. first gear; 20. gear block; 21. limiting plate; 22. second clamping block; 23. welding piece; 24. ejector rod; 25. pipeline; 26. connecting plate; 27. flame nozzle; 28. rotating groove. DETAILED DESCRIPTION

[0025] 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.

[0026] like Figures 1 to 8As shown, an embodiment of the present invention provides a special welding device for annular welds, including a welding base 1, mounting frames 2 are fixedly connected on both sides of the welding base 1, a mounting block 3 is fixedly connected to the top of the welding base 1, a limiting sleeve 4 is fixedly connected to the middle section of the bottom of the mounting frame 2, a push rod 5 is slidably connected inside the limiting sleeve 4, a first limiting ring 6 is fixedly connected to the outside of the push rod 5, a limiting slider 7 is fixedly connected to the outside of the push rod 5, a fixed sleeve 8 is slidably connected to the outside of the push rod 5, the fixed sleeve 8 is fixedly connected to the welding base 1, and the fixed sleeve 8 is inside The fixed sleeve 8 is provided with a plurality of sliding grooves, and the sliding grooves are arranged corresponding to the limit sliding block 7. The fixed sleeve 8 is provided with a plurality of limit card grooves 9 on the outside, and the plurality of limit card grooves 9 correspond to each other in a staggered manner. A sliding rod 10 is provided on the top of the fixed sleeve 8. A first card block 11 is fixedly connected to the outside of one end of the sliding rod 10. A second limit ring 12 is fixedly connected to the outside of the sliding rod 10. A spring 13 is provided at one end of the second limit ring 12. One end of the spring 13 is fixedly connected to the mounting bracket 2. A connecting plate 14 is provided on the top of the first card block 11. The connecting plate 14 is connected to the sliding rod 1 0 is fixedly connected, a welding gun 15 is slidably connected inside the mounting frame 2, and the welding gun 15 is fixedly connected to the connecting plate 14. A rotating assembly is arranged inside the mounting block 3, and a preheating assembly is arranged on one side of the top of the welding base 1. The top rod 24 is driven to rotate by the rotation of the rotating shaft 18. The rotation of the top rod 24 will push the push rod 5 to move and push the first card block 11 out of the limiting card slot 9. After one end of the first card block 11 is subjected to the elastic force of the spring 13 and its tooth surface contacts the first card block 11, the first card block 11 will rotate along one side of the tooth edge to a certain extent, and the top rod 24 will continue to rotate to disengage When cooperating with the push rod 5, the first clamping block 11 will cooperate with the limiting slot 9 again due to gravity and the elastic force of the spring 13, but since it has rotated a certain angle, it will cooperate with the short slot of the limiting slot 9. Since the first clamping block 11 cooperates with the limiting slot 9 from the long slot to the inside of the short slot, the distance between the welding gun 15 and the welded part 23 becomes longer, and the welded part 23 is welded again to achieve layered welding, which can increase the welding speed and the filling rate of the weld, reduce the generation of welding defects such as pores and cracks, thereby improving the mechanical properties of the weld and enhancing its corrosion resistance.

[0027] Wherein, the rotating assembly includes a mounting base 16, the mounting base 16 is fixedly connected to the welding base 1, a driving motor 17 is fixedly connected to the top of the mounting base 16, the output end of the driving motor 17 is fixedly connected to a rotating shaft 18, the rotating shaft 18 is rotatably connected to the welding base 1, a first gear 19 is fixedly connected to the outer side of the rotating shaft 18, a rotating groove 28 is opened inside the mounting block 3, a gear block 20 is arranged inside the rotating groove 28, the gear block 20 is meshed with the first gear 19, and the two sides of the gear block 20 are fixedly connected to the limiting plates 21, and the gear block 20 has a corresponding limiting plate inside. The plate 21 is provided with an annular groove, and the limit plate 21 is slidably connected to the inside of the annular groove. The rotating assembly also includes two second clamping blocks 22, and the two second clamping blocks 22 are respectively fixedly connected to the two sides of the middle part of the limit plate 21. The middle part of the two second clamping blocks 22 is clamped with a welding piece 23. A push rod 24 is provided at the opening of the gear block 20. The driving motor 17 is started to drive the rotating shaft 18 to rotate, and the rotation of the rotating shaft 18 drives the first gear 19 to rotate. The rotation of the first gear 19 drives the gear block 20 to rotate, and the gear block 20 rotates to drive the welding piece 23. The welding piece 23 rotates to cooperate with the welding gun 15 to complete the welding.

[0028] Among them, the preheating component includes a pipe 25, which is fixedly connected to one side of the top of the welding base 1, and one end of the pipe 25 is fixedly connected to a connecting plate 26, and a plurality of flame nozzles 27 are fixedly connected to the outer side of the connecting plate 26, and the position of the flame nozzle 27 corresponds to the welding gun 15. By passing combustible gas into the interior of the pipe 25, the gas enters the interior of the connecting plate 26 through the pipe 25 and is ignited through the flame nozzle 27 to emit flames, thereby heating the interior of the weldment 23 for preheating. At this time, the drive motor 17 is started, and the drive motor 17 is started to drive the weldment 23 to rotate. The rotation of the weldment 23 enables the flame to better preheat the weldment 23, thereby uniformly preheating the weldment 23 as a whole, reducing the temperature difference between the welded workpieces in the welding area, reducing welding stress, improving the weld quality, making the welding process smoother, and reducing production delays caused by welding problems.

[0029] Among them, one end of the push rod 5 is serrated, the diameter of the sliding rod 10 is smaller than the diameter of the push rod 5, the number of serrations at one end of the push rod 5 is twice the number of grooves of the limiting slot 9, the diameter of the first block 11 is equal to the diameter of the fixed sleeve 8, and the diameter of the sliding rod 10 is smaller than the diameter of the push rod 5. By setting the number of serrations at one end of the push rod 5 to be twice the number of grooves of the limiting slot 9, there is a serration in the middle of the limiting slot 9. After the push rod 5 pushes out the first block 11, the first block 11 can move following the inclined surface of the serration, thereby moving. The diameter of the first block 11 is equal to that of the fixed sleeve 8, so that the first block 11 can better cooperate with the fixed sleeve 8.

[0030] Among them, the outer contour shape of the limiting sleeve 4 corresponds to the push rod 5, the first limiting ring 6 is slidably connected to the inside of the limiting sleeve 4, the bottom diameter of the limiting sleeve 4 is equal to the diameter of the push rod 5, and the bottom diameter of the limiting sleeve 4 is equal to the push rod 5, so that the first limiting ring 6 can slide inside the limiting sleeve 4 while supporting the first limiting ring 6 to prevent it from slipping out of the inside of the limiting sleeve 4.

[0031] Among them, the push rod 24 is arranged corresponding to the push rod 5, the outer length of the gear block 20 at the extension of the push rod 24 is less than the diameter length of the rotating groove 28, the center point of the welding part 23 coincides with the center point of the gear block 20, and the second clamping block 22 is arranged corresponding to the center point. By setting the outer length of the gear block 20 at the extension of the push rod 24 to be less than the diameter length of the rotating groove 28, it is not hindered during movement and can move in coordination with the push rod 5.

[0032] Among them, the connecting plate 26 is arranged at the center of the welding part 23, and the distances between the multiple flame nozzles 27 and the welding part 23 are equal. By setting the connecting plate 26 at the center of the welding part 23 and the distances between the multiple flame nozzles 27 and the welding part 23 are equal, the ejected flame can better contact the welding part 23, thereby improving the preheating effect and achieving the benefits of reducing stress and improving the quality of the weld.

[0033] Working principle:

[0034] The combustible gas is introduced into the interior of the pipeline 25. After the gas enters the interior of the connecting plate 26 through the pipeline 25, it is ignited through the flame nozzle 27 and then emits a flame to heat the interior of the welding part 23 for preheating. At this time, the driving motor 17 is started, and the driving motor 17 starts to drive the rotating shaft 18 to rotate. The rotation of the rotating shaft 18 drives the first gear 19 to rotate. The rotation of the first gear 19 drives the gear block 20 to rotate. The rotation of the gear block 20 drives the second clamping block 22 to rotate. The rotation of the second clamping block 22 drives the welding part 23 to rotate. The rotation of the welding part 23 enables the flame to better preheat the welding part 23, thereby uniformly preheating the welding part 23 as a whole, reducing the temperature difference between the welded workpieces in the welding area, reducing the welding stress, improving the weld quality, making the welding process smoother, and reducing production delays caused by welding problems;

[0035] After preheating is completed, the driving motor 17 starts to drive the rotating shaft 18 to rotate, and the rotation of the rotating shaft 18 drives the first gear 19 to rotate, and the rotation of the first gear 19 drives the gear block 20 to rotate, and the rotation of the gear block 20 drives the welding piece 23 and the push rod 24 to rotate. After the welding gun 15 welds the welding piece 23 for a circle, the first gear 19 continues to rotate to drive the push rod 24 to contact with the push rod 5. After the push rod 24 contacts with the push rod 5, it will push the push rod 5 to move, and the push rod 5 moves to push the first clamping block 11 to move, and the movement of the first clamping block 11 drives the sliding rod 10 to move, and the movement of the sliding rod 10 drives the second limiting ring 12, the connecting plate 14 and the welding gun 15 to move, and the movement of the second limiting ring 12 compresses the spring 13. After the push rod 5 pushes the first clamping block 11 out of the limiting clamping groove 9, one end of the first clamping block 11 is subjected to the elastic force of the spring 13 and then due to its tooth surface and the first When a block 11 contacts the first block 11, it will rotate along one side of the tooth edge. When the push rod 24 continues to rotate to disengage from the push rod 5, the push rod 5 falls due to gravity, thereby losing the lifting force on the first block 11. At this time, the first block 11 will cooperate with the limiting slot 9 again due to gravity and the elastic force of the spring 13, but because it rotates a certain angle, it will cooperate with the short slot of the limiting slot 9. At this time, the connecting plate 14 and the welding gun 15 follow the movement of the first block 11. Due to the cooperation between the first block 11 and the limiting slot 9, it enters the short slot from the long slot, so that the distance between the welding gun 15 and the welding part 23 becomes longer, and the welding part 23 is welded again to achieve layered welding, which can improve the welding speed and the filling rate of the weld, reduce the generation of welding defects such as pores and cracks, thereby improving the mechanical properties of the weld and enhancing its corrosion resistance.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] 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 special welding device for annular welds, comprising a welding base (1), mounting frames (2) being fixedly connected to both sides of the welding base (1), and a mounting block (3) being fixedly connected to the top of the welding base (1), characterized in that: The middle section of the bottom of the mounting frame (2) is fixedly connected to a limiting sleeve (4), a push rod (5) is slidably connected inside the limiting sleeve (4), a first limiting ring (6) is fixedly connected to the outside of the push rod (5), a limiting slider (7) is fixedly connected to the outside of the push rod (5), a fixed sleeve (8) is slidably connected to the outside of the push rod (5), the fixed sleeve (8) is fixedly connected to the welding base (1), a plurality of sliding grooves are arranged inside the fixed sleeve (8), the sliding grooves are arranged corresponding to the limiting slider (7), a plurality of limiting slots (9) are arranged on the outside of the fixed sleeve (8), the plurality of limiting slots (9) are staggered and correspond to each other, and a sliding rod is arranged on the top of the fixed sleeve (8). (10), a first clamping block (11) is fixedly connected to the outside of one end of the sliding rod (10), a second limiting ring (12) is fixedly connected to the outside of the sliding rod (10), a spring (13) is provided at one end of the second limiting ring (12), one end of the spring (13) is fixedly connected to the mounting frame (2), a connecting plate (14) is provided on the top of the first clamping block (11), the connecting plate (14) is fixedly connected to the sliding rod (10), a welding gun (15) is slidably connected inside the mounting frame (2), the welding gun (15) is fixedly connected to the connecting plate (14), a rotating assembly is provided inside the mounting block (3), and a preheating assembly is provided on one side of the top of the welding base (1); The rotating assembly comprises a mounting base (16), wherein the mounting base (16) is fixedly connected to the welding base (1), a driving motor (17) is fixedly connected to the top of the mounting base (16), an output end of the driving motor (17) is fixedly connected to a rotating shaft (18), the rotating shaft (18) is rotatably connected to the welding base (1), a first gear (19) is fixedly connected to the outer side of the rotating shaft (18), a rotating groove (28) is provided inside the mounting block (3), a gear block (20) is provided inside the rotating groove (28), the gear block (20) is meshingly connected to the first gear (19), both sides of the gear block (20) are fixedly connected to limiting plates (21), an annular sliding groove is provided inside the gear block (20) corresponding to the limiting plate (21), and the limiting plate (21) is slidably connected inside the annular sliding groove; The rotating assembly further comprises two second clamping blocks (22), the two second clamping blocks (22) being respectively fixedly connected to two sides of the middle of the limiting plate (21), the middle of the two second clamping blocks (22) being clamped with a welding piece (23), and a push rod (24) being arranged at the opening of the gear block (20).

2. The special welding equipment for annular weld according to claim 1, characterized in that: The preheating assembly comprises a pipe (25), the pipe (25) being fixedly connected to one side of the top of the welding base (1), one end of the pipe (25) being fixedly connected to a connection plate (26), the outer side of the connection plate (26) being fixedly connected to a plurality of flame ejection ports (27), the position of the flame ejection ports (27) corresponding to the welding gun (15).

3. A special welding device for annular weld according to claim 2, characterized in that: One end of the push rod (5) is sawtooth-shaped, the diameter of the sliding rod (10) is smaller than the diameter of the push rod (5), the number of saw teeth at one end of the push rod (5) is twice the number of grooves of the limit groove (9), the diameter of the first clamping block (11) is equal to the diameter of the fixed sliding sleeve (8), and the diameter of the sliding rod (10) is smaller than the diameter of the push rod (5).

4. The special welding equipment for annular weld according to claim 3, characterized in that: The outer contour shape of the limiting sleeve (4) corresponds to that of the push rod (5); the first limiting ring (6) is slidably connected to the interior of the limiting sleeve (4); and the bottom diameter of the limiting sleeve (4) is equal to the diameter of the push rod (5).

5. The special welding equipment for annular weld according to claim 4, characterized in that: The push rod (24) is arranged corresponding to the push rod (5), the outer length of the gear block (20) where the push rod (24) extends is less than the diameter length of the rotating groove (28), the center point of the welding part (23) coincides with the center point of the gear block (20), and the second clamping block (22) is arranged corresponding to the center point.

6. The special welding equipment for annular weld according to claim 5, characterized in that: The connecting plate (26) is arranged at the center of the welding piece (23), and the distances between the plurality of flame blasting ports (27) and the welding piece (23) are equal.

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