Circular seam submerged arc welding equipment in container

Abstract

The invention discloses submerged arc welding equipment for a circular seam in a container, and relates to the technical field of container welding, the submerged arc welding equipment comprises a container bracket used for supporting and rotating the container, a lead screw sliding table is arranged on one side of the container bracket, a hydraulic cylinder is arranged on the lead screw sliding table, an output shaft of the hydraulic cylinder is connected with a cross beam, one end of the cross beam is connected with a welding mechanism, and the other end of the cross beam is connected with a hydraulic cylinder. The welding mechanism comprises a circular cavity, and a storage hopper communicated with the interior of the circular cavity is arranged on the upper portion of the circular cavity. According to the circular seam submerged arc welding equipment in the container, an output shaft of a double-shaft motor is used for driving a main gear, a gear disc and a disc to rotate, an arc-shaped rack on the disc is sequentially meshed with a straight rack on a connecting rod, an L-shaped plate and a tamping shaft are driven to do vertical reciprocating motion, and welding flux in a storage hopper is tamped; and the L-shaped plate is quickly reset through the supporting spring, so that blockage caused by excessive welding flux in the storage hopper is effectively prevented, the welding flux discharging smoothness is ensured, and the welding quality stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of container welding, and particularly to a submerged arc welding device for circumferential seams inside a container. Background Art

[0002] In modern industrial production, containers are widely used, and their quality and performance directly affect the safe production and efficient operation in many fields. The circumferential seam welding inside a container is a key process for ensuring the sealing performance and strength of the container. As a commonly used and efficient welding method, submerged arc welding is widely applied to the welding operation of container circumferential seams. Although traditional submerged arc welding can achieve basic welding functions, with the continuous improvement of industrial requirements for container quality, how to further improve welding quality and production efficiency has become an important issue urgently to be solved in the industry.

[0003] Existing submerged arc welding devices for circumferential seams inside containers have certain limitations, resulting in the following problems during the welding process. In terms of welding position adjustment, some devices cannot flexibly and accurately locate the circumferential seams inside the container, making it difficult to achieve full-automatic welding in all directions, increasing the difficulty and workload of manual operation. The flux supply system of traditional devices is prone to clogging. Due to the lack of effective anti-clogging measures, the flux feeding is not smooth, resulting in uneven flux coverage during the welding process, which affects the welding quality. In addition, the supply and stop of the flux during the welding process mostly rely on manual control, lacking an intelligent temperature sensing and regulation mechanism, and unable to automatically and accurately supply the flux according to the actual welding situation, thereby reducing the welding efficiency and the stability of welding quality. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a submerged arc welding device for circumferential seams inside a container, which solves the problems of limitations existing in the existing submerged arc welding devices for circumferential seams inside containers, inaccurate welding position positioning, difficulty in achieving full-automatic welding in all directions, easy clogging of the flux supply system and uneven flux feeding, flux supply relying on manual labor, lack of temperature sensing and regulation, and reduction of welding efficiency and quality stability.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A submerged arc welding device for circumferential seams inside a container includes a container bracket for supporting and rotating the container. A lead screw slide is arranged on one side of the container bracket. A hydraulic cylinder is arranged on the lead screw slide. The output shaft of the hydraulic cylinder is connected to a cross beam. One end of the cross beam is connected to a welding mechanism. The welding mechanism includes a circular cavity. A storage hopper communicating with its interior is arranged above the circular cavity. The welding mechanism also includes an anti-clogging mechanism for preventing the flux in the storage hopper from being clogged.

[0006] The anti-blocking mechanism includes a concave frame fixedly installed between both sides of the circular cavity. A vertical plate is arranged on the upper part of the concave frame. A double-shaft motor is installed at the lower part of the side of the vertical plate close to the circular cavity. One output shaft of the double-shaft motor is connected to a main gear on the other side of the vertical plate. A gear disc meshing with the main gear is also rotatably arranged on the other side of the vertical plate. A disc is arranged at the center of one side of the gear disc. A plurality of arc-shaped racks are equidistantly arranged at the outer edge of the disc. The anti-blocking mechanism further includes a limiting shaft arranged at the top of the vertical plate. An L-shaped plate is longitudinally slidably sleeved on the outer part of the limiting shaft. A support spring is also sleeved on the outer part of the limiting shaft. Two ends of the support spring are respectively connected to the top of the vertical plate and the bottom of the L-shaped plate. Two ends of the L-shaped plate are respectively connected to a ramming shaft and a connecting rod. The lower end of the ramming shaft is located in the storage hopper. A straight rack adapted to the arc-shaped rack is arranged on one side of the connecting rod.

[0007] Further, a material control mechanism is arranged at the bottom of the circular cavity. A material discharging port is also arranged at one side of the bottom of the circular cavity where the material control mechanism is located. A wire feeding mechanism and an arc-shaped plate are arranged inside the circular cavity. A channel is formed between the arc-shaped plate and the inner wall of the circular cavity, so that the flux in the storage hopper falls into the channel and is discharged from the material discharging port at the bottom of the circular cavity.

[0008] Further, the lower end of the ramming shaft is located at the lower outlet of the inside of the storage hopper. When the disc rotates, the arc-shaped racks on the disc are sequentially meshed with the straight rack on the connecting rod.

[0009] Further, the wire feeding mechanism includes a wire reel rotatably arranged at the center inside the circular cavity. The other output shaft of the double-shaft motor is connected to the wire reel. A wire strip is wound inside the wire reel. The lower end of the wire strip slides and extends out of the circular cavity.

[0010] Further, the wire feeding mechanism also includes two guide wheels rotatably arranged inside the circular cavity. The two guide wheels are respectively located on both sides of the wire strip and are used for guiding the wire strip.

[0011] Further, the material control mechanism includes a convex block arranged at one side of the bottom of the circular cavity where the material discharging port is located. A guide shaft is connected to one side of the convex block. A moving seat is horizontally slidably sleeved on the outer part of the guide shaft. A helical memory alloy is also sleeved on the outer part of the guide shaft. Two ends of the helical memory alloy are respectively connected to one side of the convex block and one side of the moving seat. A pulling rope is connected to one side of the upper end of the moving seat. The material control mechanism further includes a guiding plate hinged to the inner wall of the material discharging port at the bottom of the circular cavity. The other end of the pulling rope is connected to the bottom of the guiding plate.

[0012] Further, the guiding plate is connected to the circular cavity through a torsion spring hinge. When the torsion spring hinge is in the reset state, the guiding plate just seals the material discharging port at the bottom of the circular cavity.

[0013] Further, when the temperature of the spiral shape memory alloy is above 100 degrees, it reaches the phase change temperature for shortening, causing the pulling rope to pull the guiding plate to open the material discharging opening at the bottom of the circular cavity. When the temperature of the spiral shape memory alloy is below 70 degrees, it reaches the phase change temperature for resetting, causing the guiding plate to reset and seal the material discharging opening at the bottom of the circular cavity.

[0014] The present invention provides a submerged arc welding device for circumferential seams inside a container, which has the following beneficial effects compared with the prior art: In this submerged arc welding device for circumferential seams inside a container, one output shaft of the dual-axis motor drives the main gear, the gear disk and the disk to rotate. The arc-shaped rack on the disk meshes with the straight rack on the connecting rod in sequence, driving the L-shaped plate and the ramming shaft to move up and down repeatedly to ram the welding flux in the storage hopper. When the arc-shaped rack leaves the straight rack, the supporting spring causes the L-shaped plate to quickly reset, effectively preventing blockage in the storage hopper due to excessive welding flux, ensuring the smoothness of the welding flux feeding, and improving the stability of the welding quality.

[0015] In this submerged arc welding device for circumferential seams inside a container, during welding, the temperature around the welding wire bar rises. When the spiral shape memory alloy reaches the phase change temperature above 100 degrees, it shortens, driving the moving seat to move leftward, pulling the guiding plate to open the material discharging opening at the bottom of the circular cavity, enabling the welding flux to fall into the welding position to achieve submerged arc welding. When the temperature is lower than 70 degrees after welding is completed, the spiral shape memory alloy elongates and resets, and the guiding plate closes the material discharging opening. This temperature sensing control method realizes the automation and precision of the welding flux supply during the submerged arc welding process, reduces the manual operation steps, and improves the welding efficiency and quality.

[0016] In this submerged arc welding device for circumferential seams inside a container, the container bracket drives the container to rotate, and cooperates with the screw slide table and the hydraulic cylinder to precisely control the position of the welding mechanism, enabling easy alignment with the circumferential seam inside the container for welding operations. At the same time, the other output shaft of the dual-axis motor drives the welding wire disk to rotate, realizing the automatic feeding of the welding wire bar, and guiding through the guide wheels to ensure that the welding wire bar accurately extends to the welding position. The whole process is efficient and flexible, greatly improving the convenience and precision of the circumferential seam welding inside the container. Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the overall structural schematic diagram of the welding mechanism of the present invention; Figure 3 is the internal structural schematic diagram of the circular cavity of the present invention; Figure 4 is the front structural schematic diagram of the anti-blocking mechanism of the present invention; Figure 5 is the back structural schematic diagram of the anti-blocking mechanism of the present invention; Figure 6 of the present inventionFigure 3 Partial enlarged schematic diagram of the central control material mechanism.

[0018] In the figure: 1. Container bracket; 2. Lead screw slide; 3. Hydraulic cylinder; 4. Cross beam; 5. Welding mechanism; 51. Circular cavity; 52. Material storage hopper; 53. Anti-blocking mechanism; 531. Concave frame; 532. Vertical plate; 533. Biaxial motor; 534. Limit shaft; 535. Support spring; 536. L-shaped plate; 537. Ramming shaft; 538. Main gear; 539. Gear disc; 5310. Disc; 5311. Arc-shaped rack; 5312. Connecting rod; 5313. Straight rack; 54. Material control mechanism; 541. Convex block; 542. Guide shaft; 543. Moving seat; 544. Shape memory alloy wire; 545. Pulling rope; 546. Guide plate; 55. Wire feeding mechanism; 551. Wire reel; 552. Wire strip; 553. Guide wheel; 56. Arc-shaped plate; 57. Channel. Specific implementation mode

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 - 6 , the present invention provides three technical solutions: Embodiment 1 Please refer to Figures 1 - 2 , in the embodiment of the present invention, a submerged arc welding device for circumferential seams in a container includes a container bracket 1 for supporting a rotating container. A lead screw slide 2 is arranged on one side of the container bracket 1. A hydraulic cylinder 3 is arranged on the lead screw slide 2. The output shaft of the hydraulic cylinder 3 is connected to a cross beam 4. One end of the cross beam 4 is connected to a welding mechanism 5. The welding mechanism 5 includes a circular cavity 51. A material storage hopper 52 communicating with the inside thereof is arranged above the circular cavity 51. The welding mechanism 5 further includes an anti-blocking mechanism 53 for preventing the flux in the material storage hopper 52 from being blocked.

[0021] Please refer to Figure 2 and Figures 4 - 5, in the embodiment of the present invention, the anti-blocking mechanism 53 includes a concave-shaped frame 531 fixedly installed between both sides of the circular cavity 51. A vertical plate 532 is arranged on the upper part of the concave-shaped frame 531. A double-shaft motor 533 is installed at the lower part of the side of the vertical plate 532 close to the circular cavity 51. One output shaft of the double-shaft motor 533 is connected to a main gear 538 at the other side of the vertical plate 532. A gear disc 539 meshing with the main gear 538 is also rotated on the other side of the vertical plate 532. A disc 5310 is arranged at the center of the surface of the gear disc 539. A plurality of arc-shaped racks 5311 are equidistantly arranged at the outer edge of the disc 5310. The anti-blocking mechanism 53 further includes a limiting shaft 534 arranged at the top of the vertical plate 532. An L-shaped plate 536 is longitudinally slidably sleeved on the outer part of the limiting shaft 534. A support spring 535 is also sleeved on the outer part of the limiting shaft 534. Both ends of the support spring 535 are respectively connected to the top of the vertical plate 532 and the bottom of the L-shaped plate 536. Both ends of the L-shaped plate 536 are respectively connected to a ramming shaft 537 and a connecting rod 5312. The lower end of the ramming shaft 537 is located in the storage hopper 52. A straight rack 5313 adapted to the arc-shaped rack 5311 is arranged on one side of the connecting rod 5312.

[0022] In this solution, when the double-shaft motor 533 works, its other output shaft drives the main gear 538 to rotate. The main gear 538 drives the gear disc 539 meshing with it to rotate. The gear disc 539 drives the disc 5310 to rotate. Each arc-shaped rack 5311 on the disc 5310 will sequentially mesh with the straight rack 5313 on the connecting rod 5312. When they are meshed, under the rotation of the disc 5310, it will drive the connecting rod 5312 to longitudinally displace, and then drive the L-shaped plate 536 to longitudinally displace. The support spring 535 will deform. When the arc-shaped rack 5311 leaves the straight rack 5313, the straight rack 5313 will not be subject to the binding force, and the support spring 535 will quickly reset the L-shaped plate 536. Similarly, under the continuous rotation of the disc 5310, the L-shaped plate 536 will continuously move up and down repeatedly. In this way, the ramming shaft 537 will ram the flux in the storage hopper 52 to prevent the problem of difficult feeding caused by blockage due to too much flux in the storage hopper 52.

[0023] Further, please refer to Figure 3 , in the embodiment of the present invention, a material control mechanism 54 is arranged at the bottom of the circular cavity 51. A material outlet is also arranged at one side of the bottom of the circular cavity 51 where the material control mechanism 54 is located. A wire feeding mechanism 55 and an arc-shaped plate 56 are arranged inside the circular cavity 51. A channel 57 is formed between the arc-shaped plate 56 and the inner wall of the circular cavity 51, so that the flux in the storage hopper 52 falls into the channel 57 and is discharged from the material outlet at the bottom of the circular cavity 51.

[0024] Still further, please refer to Figure 3, in the embodiment of the present invention, the lower end of the ramming shaft 537 is located at the lower outlet inside the storage hopper 52. When the disc 5310 rotates, the arc-shaped rack 5311 on the disc 5310 meshes with the straight rack 5313 on the connecting rod 5312 in sequence.

[0025] Embodiment 2, the difference from Embodiment 1 is that: Please refer to Figure 3 , in the embodiment of the present invention, the wire feeding mechanism 55 includes a wire spool 551 rotatably arranged at the center inside the circular cavity 51. The other output shaft of the dual-axis motor 533 is connected to the wire spool 551, and a wire strip 552 is wound inside the wire spool 551. The lower end of the wire strip 552 slides and extends out of the circular cavity 51.

[0026] In this solution, one output shaft of the dual-axis motor 533 drives the wire spool 551 to rotate. The wire spool 551 feeds the wire strip 552, and the guide wheel 553 guides the wire strip 552, so that the lower end of the wire strip 552 extends out of the circular cavity 51 and contacts the circumferential seam, thereby realizing the wire feeding operation of the wire strip 552.

[0027] Furthermore, please refer to Figure 3 , in the embodiment of the present invention, the wire feeding mechanism 55 further includes two guide wheels 553 rotatably arranged inside the circular cavity 51. The two guide wheels 553 are respectively located on both sides of the wire strip 552 and are used to guide the wire strip 552 to keep the wire strip 552 stable during feeding.

[0028] Embodiment 3, the difference from Embodiment 1 is that: Please refer to Figure 3 and Figure 6 , in the embodiment of the present invention, the material control mechanism 54 includes a convex block 541 arranged at the bottom of the circular cavity 51 on one side of the feeding port. One side of the convex block 54 is connected with a guide shaft 542. A moving seat 543 is horizontally slidably sleeved on the outside of the guide shaft 542. A helical memory alloy 544 is also sleeved on the outside of the guide shaft 542. The two ends of the helical memory alloy 544 are respectively connected with one side of the convex block 541 and one side of the moving seat 543. One side of the upper end of the moving seat 543 is connected with a pull rope 545. The material control mechanism 54 further includes a guide plate 546 hinged to the inner wall of the feeding port at the bottom of the circular cavity 51. The other end of the pull rope 545 is connected with the bottom of the guide plate 546.

[0029] Please refer to Figure 3 and Figure 6 , in the embodiment of the present invention, the guide plate 546 is connected to the circular cavity 51 through a torsion spring hinge. When the torsion spring hinge is in the reset state, the guide plate 546 just seals the feeding port at the bottom of the circular cavity 51.

[0030] Please refer to Figure 3 andFigure 6 In the embodiment of the present invention, when the temperature of the helical shape memory alloy 544 is above 100 degrees, it reaches the phase transition temperature for shortening, causing the pull rope 545 to pull the guide plate 546 to open the material discharge port at the bottom of the circular cavity 51. When the temperature of the helical shape memory alloy 544 is below 70 degrees, it reaches the reset phase transition temperature, causing the guide plate 546 to reset and seal the material discharge port at the bottom of the circular cavity 51.

[0031] In this solution: during welding, the temperature around the lower end of the welding wire strip 552 will rise. When the helical shape memory alloy 544 is subjected to a temperature above 100 degrees, the helical shape memory alloy 544 will reach the phase transition temperature and shorten, thereby driving the moving seat 543 to move leftward. The pull rope 545 on the moving seat 543 will pull the guide plate 546 to rotate downward, opening the material discharge port at the bottom of the circular cavity 51. Then, the flux in the storage hopper 52 will enter the channel 57 and then fall from the material discharge port at the bottom of the circular cavity 51. The opened guide plate 546 can guide the flux and direct it to the welding position, thus realizing submerged arc welding. After welding is completed, the temperature around the welding wire strip 552 will drop sharply. When the temperature is below 70 degrees, the helical shape memory alloy 544 reaches the phase transition temperature again and elongates, causing the moving seat 543 to reset. In this way, the guide plate 546 is not subjected to the pulling force of the pull rope 545 and, under the action of the torsion spring, the guide plate 546 resets to seal the material discharge port at the bottom of the circular cavity 51 and prevent the flux from falling.

[0032] Working principle: Place the container on the container bracket 1. The container bracket 1 can drive the container to rotate, facilitating the welding of the inner circumferential seam of the container. Then, the screw rod sliding table 2 drives the hydraulic cylinder 3 to displace, so that the welding mechanism 5 at one end of the cross beam 4 extends into the position of the inner circumferential seam of the container. After that, the hydraulic cylinder 3 drives the cross beam 4 to move downward, causing the welding wire strip 552 to contact the circumferential seam. Then, under the rotation of the cylinder, the welding wire strip 552 will weld the circumferential seam. During welding, one output shaft of the biaxial motor 533 drives the wire spool 551 to rotate. The wire spool 551 feeds the welding wire strip 552, and the guide wheel 553 guides the welding wire strip 552, so that the lower end of the welding wire strip 552 extends out of the circular cavity 51 and contacts the circumferential seam, thereby realizing the wire feeding operation of the welding wire strip 552; When the biaxial motor 533 operates, its other output shaft drives the main gear 538 to rotate. The main gear 538 drives the gear disk 539 meshing with it to rotate. The gear disk 539 drives the disk 5310 to rotate. Each arc-shaped rack 5311 on the disk 5310 will sequentially mesh with the straight rack 5313 on the connecting rod 5312. When they mesh, under the rotation of the disk 5310, it will drive the connecting rod 5312 to longitudinally displace, and then drive the L-shaped plate 536 to longitudinally displace. The support spring 535 will deform. When the arc-shaped rack 5311 leaves the straight rack 5313, the straight rack 5313 will not be subject to a binding force, and the support spring 535 will quickly reset the L-shaped plate 536. Similarly, under the continuous rotation of the disk 5310, the L-shaped plate 536 will continuously move up and down repeatedly. In this way, the tamping shaft 537 will tamp the flux in the storage hopper 52 to prevent the problem of difficult feeding caused by blockage due to excessive flux in the storage hopper 52. During welding, the temperature around the lower end of the welding wire strip 552 will rise. When the shape memory alloy 544 reaches a temperature above 100 degrees, the shape memory alloy 544 will reach its phase transition temperature and shorten, thereby driving the moving seat 543 to move left. The pull rope 545 on the moving seat 543 will pull the guiding plate 546 to rotate downward, opening the material outlet at the bottom of the circular cavity 51. The flux in the storage hopper 52 will enter the channel 57 and then fall from the material outlet at the bottom of the circular cavity 51. The opened guiding plate 546 can guide the flux and direct it to the welding position, thus realizing submerged arc welding. After welding is completed, the temperature around the welding wire strip 552 will drop rapidly. When the temperature is lower than 70 degrees, the shape memory alloy 544 reaches the phase transition temperature again and elongates, resetting the moving seat 543. In this way, the guiding plate 546 will not be subject to the pulling force of the pull rope 545, and under the action of the torsion spring, the guiding plate 546 will reset, sealing the material outlet at the bottom of the circular cavity 51 to prevent the flux from falling.

[0033] Meanwhile, the content not described in detail in this specification belongs to the well-known prior art of those skilled in the art.

Claims

1. An internal circumferential submerged arc welding device in a container, comprising a container bracket (1) for supporting a rotating container, characterized in that: On one side of the container bracket (1), a lead screw slide (2) is provided. A hydraulic cylinder (3) is arranged on the lead screw slide (2). The output shaft of the hydraulic cylinder (3) is connected to a cross beam (4). One end of the cross beam (4) is connected to a welding mechanism (5). The welding mechanism (5) includes a circular cavity (51). A storage hopper (52) communicating with its interior is arranged above the circular cavity (51). The welding mechanism (5) further includes a clogging prevention mechanism (53) for preventing the flux in the storage hopper (52) from being clogged. The clogging prevention mechanism (53) includes a concave frame (531) fixedly installed between the two sides of the circular cavity (51). A vertical plate (532) is arranged above the concave frame (531). A double-shaft motor (533) is installed at the lower part near the side of the vertical plate (532) facing the circular cavity (51). One output shaft of the double-shaft motor (533) is connected to a main gear (538) on the other side of the vertical plate (532). A gear disc (539) meshing with the main gear (538) is also rotatably arranged on the other side of the vertical plate (532). A disc (5310) is arranged at the center of one side of the gear disc (539). A number of arc-shaped racks (5311) are equidistantly arranged at the outer edge of the disc (5310). The clogging prevention mechanism (53) further includes a limiting shaft (534) arranged at the top of the vertical plate (532). An L-shaped plate (536) is longitudinally slidably sleeved on the outside of the limiting shaft (534). A support spring (535) is also sleeved on the outside of the limiting shaft (534). The two ends of the support spring (535) are respectively connected to the top of the vertical plate (532) and the bottom of the L-shaped plate (536). The two ends of the L-shaped plate (536) are respectively connected to a ramming shaft (537) and a connecting rod (5312). The lower end of the ramming shaft (537) is located inside the storage hopper (52). A straight rack (5313) adapted to the arc-shaped rack (5311) is arranged on one side of the connecting rod (5312).

2. The submerged arc welding equipment for circumferential seams inside a container according to claim 1, characterized in that: A material control mechanism (54) is arranged at the bottom of the circular cavity (51). A material discharge port is arranged at one side of the bottom of the circular cavity (51) where the material control mechanism (54) is located. A wire feeding mechanism (55) and an arc-shaped plate (56) are arranged inside the circular cavity (51). A channel (57) is formed between the arc-shaped plate (56) and the inner wall of the circular cavity (51), so that the flux in the storage hopper (52) falls into the channel (57) and is discharged from the material discharge port at the bottom of the circular cavity (51).

3. The circumferential submerged arc welding equipment in a container according to claim 1, characterized in that: The lower end of the ramming shaft (537) is located at the lower outlet inside the storage hopper (52). When the disc (5310) rotates, the arc-shaped racks (5311) on the disc (5310) are sequentially engaged with the straight rack (5313) on the connecting rod (5312).

4. The circumferential submerged arc welding equipment in a container according to claim 2, characterized in that: The wire feeding mechanism (55) includes a wire reel (551) rotatably arranged at the center inside the circular cavity (51). The other output shaft of the double-shaft motor (533) is connected to the wire reel (551). A wire strip (552) is wound inside the wire reel (551). The lower end of the wire strip (552) slides and extends out of the circular cavity (51).

5. The circumferential submerged arc welding equipment in a container according to claim 4, characterized in that: The wire feeding mechanism (55) further includes two wire guide wheels (553) rotatably arranged inside the circular cavity (51). The two wire guide wheels (553) are respectively located on both sides of the wire strip (552) and are used for guiding the wire strip (552).

6. The submerged arc welding equipment for circumferential seam in a container according to claim 2, characterized in that: The material control mechanism (54) includes a convex block (541) arranged at the bottom of the circular cavity (51) on one side of the material discharging port. One side of the convex block (541) is connected with a guide shaft (542). A moving seat (543) is horizontally and slidably sleeved on the outside of the guide shaft (542). A shape memory alloy (544) is also sleeved on the outside of the guide shaft (542). Two ends of the shape memory alloy (544) are respectively connected with one side of the convex block (541) and one side of the moving seat (543). A pull rope (545) is connected to one side of the upper end of the moving seat (543). The material control mechanism (54) further includes a guide plate (546) hinged to the inner wall of the material discharging port at the bottom of the circular cavity (51). The other end of the pull rope (545) is connected to the bottom of the guide plate (546).

7. An internal circumferential submerged arc welding device for a container according to claim 6, characterized in that: The guide plate (546) is connected to the circular cavity (51) through a torsion spring hinge. When the torsion spring hinge is in the reset state, the guide plate (546) just seals the material discharging port at the bottom of the circular cavity (51).

8. The circumferential submerged arc welding equipment in a container according to claim 6, characterized in that: When the temperature of the shape memory alloy (544) is above 100 degrees, it reaches the phase transition temperature of shortening, so that the pull rope (545) pulls the guide plate (546) to open the material discharging port at the bottom of the circular cavity (51). When the temperature of the shape memory alloy (544) is below 70 degrees, it reaches the reset phase transition temperature, so that the guide plate (546) resets to seal the material discharging port at the bottom of the circular cavity (51).

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