An automatic welding apparatus and method for tank welding

Abstract

The present application relates to welding device technical field, specifically to a kind of automatic welding device and method for storage tank welding.A kind of automatic welding device for storage tank welding, including welding trolley and welding torch, welding trolley includes shell and multiple drive components, welding torch is installed on shell, drive component includes double-output shaft motor and two drive wheels, double-output shaft motor is installed in shell, drive wheel includes wheel body and Nd-Fe-B magnet, wheel body is installed on the output shaft of double-output shaft motor.Wheel body has cooling cavity, Nd-Fe-B magnet is installed in cooling cavity, liquid pump is provided in shell, and liquid pump can transport cooling liquid into cooling cavity.A kind of automatic welding device for storage tank welding of the present application utilizes cooling cavity and Nd-Fe-B magnet and liquid pump cooperation, when welding, cooling liquid can flow in cooling cavity and exchange heat with Nd-Fe-B magnet, and Nd-Fe-B magnet is cooled, to guarantee the adsorption of drive wheel to storage tank and the normal progress of welding.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and specifically to an automatic welding device and method for welding storage tanks. Background Technology

[0002] Metal storage tanks, as core storage and transportation equipment in the petroleum, chemical, and warehousing industries, are characterized by their large size, thin plates, poor rigidity, and numerous welds. The quality of their welding directly determines the tank's sealing performance, structural strength, and service life. Due to the large workload and complex welding positions involved in tank welding, traditional manual welding can no longer meet the demands for large-scale, high-precision welding. Automatic and semi-automatic arc welding technology, with its advantages of high welding efficiency, stable weld quality, and low labor intensity, has gradually become the mainstream method for welding metal storage tanks. The welding carriage is the core equipment for realizing automatic and semi-automatic arc welding.

[0003] Welding trolleys used for welding storage tanks achieve automated or semi-automatic arc welding operations through the coordinated action of a track system and a drive mechanism. Their core functions cover various welding positions, including vertical, horizontal, and lateral welding, making them fully adaptable to the welding needs of different parts of metal storage tanks. The structure of these welding trolleys generally includes a welding carriage body, a drive unit, a welding torch adjustment mechanism, and a control system. The drive method typically employs a planetary geared motor or rack and pinion drive, enabling precise movement and positioning during the welding process.

[0004] In the welding process of metal storage tanks, the stable adhesion of the welding carriage is crucial to ensuring welding continuity and weld precision. Currently, most welding carriages use magnetic adhesion, with their wheels relying on magnetic force to adhere to the surface of the tank to be welded, achieving stable movement and positioning during the welding process. To adapt to the high-temperature working environment of welding, existing equipment typically uses high-temperature resistant neodymium iron boron magnets to make the adhesion wheels, in order to withstand the high temperatures generated during welding as much as possible. However, the magnetism of the magnetic adhesion wheels will weaken under prolonged exposure to high temperatures, leading to a significant decrease in adhesion force. In severe cases, the welding carriage may become loosely attached and detach from the tank surface. This not only interrupts the normal welding process, affecting welding efficiency and construction progress, but may also cause defects such as weld misalignment, reducing weld quality. Summary of the Invention

[0005] This invention provides an automatic welding device and method for welding storage tanks, which solves the problem that the magnetic adsorption wheels on existing welding trolleys are affected by high temperatures, resulting in weak adsorption and even affecting the normal progress of welding.

[0006] The present invention provides an automatic welding device for welding storage tanks, comprising a welding carriage and a welding torch. The welding carriage includes a housing and multiple drive components. The welding torch is mounted on the housing. Each drive component includes a dual-output shaft motor and two drive wheels. The dual-output shaft motors of the multiple drive components are all mounted inside the housing. Each drive wheel includes a wheel body and a neodymium iron boron magnet. The two wheel bodies are respectively mounted on the two output shafts of the dual-output shaft motor and can move along the extension direction of the weld seam on the storage tank. The wheel body has a cooling chamber, and the neodymium iron boron magnet is mounted inside the cooling chamber. A liquid pump is provided inside the housing, and the liquid pump can deliver coolant to the cooling chamber.

[0007] Furthermore, the wheel body includes a support ring, a rubber ring, and two steel plates. The support ring is mounted on the output shaft of the dual-output shaft motor. The cooling chamber is defined by the support ring and the output shaft of the dual-output shaft motor and is an annular cavity. The rubber ring is mounted outside the support ring, and the two steel plates are respectively mounted on both ends of the neodymium iron boron magnet in a first direction, which is the axial direction of the output shaft of the dual-output shaft motor.

[0008] Furthermore, a magnetic sleeve is provided between the output shaft of the dual-output-shaft motor and the neodymium iron boron magnet, and the magnetic sleeve is made of a high magnetic permeability material.

[0009] Furthermore, each output shaft of the dual-output-shaft motor is equipped with a liquid collecting ring, which has an inlet and an outlet, both of which are connected to the liquid pump via connecting pipes. Each output shaft of the dual-output-shaft motor is provided with a flow channel, and the liquid collecting ring is provided in a one-to-one correspondence with the flow channel. The flow channel includes a return channel and two inlet channels. One end of each of the two inlet channels is connected to the inlet of the corresponding liquid collecting ring. Each steel plate is provided with a first channel, which is provided in a one-to-one correspondence with the inlet channel, and the other end of the first channel is connected to the corresponding inlet channel. Both first channels are connected to the cooling chamber. One end of the return channel is connected to the outlet of the corresponding liquid collecting ring. A second channel is provided on the magnetic sleeve, and a third channel is provided on the neodymium iron boron magnet. The second and third channels are connected, and the other end of the return channel is connected to the cooling chamber through the second and third channels.

[0010] Furthermore, the support ring has a connecting port for connecting the first channel and the cooling chamber.

[0011] Furthermore, the housing is provided with a transmission component, which includes a motor, a gear, and a rack; the motor is mounted on the housing, the gear is fixedly mounted on the output shaft of the motor, the rack is arranged along a first direction, the rack is slidably mounted on the housing and meshes with the gear, a mounting bracket is connected to the rack, and the welding torch is mounted on the mounting bracket.

[0012] Furthermore, one output shaft of the dual-output shaft motor of one of the drive components is referred to as the first shaft. The first shaft includes a first shaft segment and a second shaft segment. The first shaft segment is mounted on the dual-output shaft motor, and the first shaft segment and the second shaft segment are connected by a spring coupling. One drive wheel of the drive component is mounted on the second shaft segment, and in the first direction, the neodymium iron boron magnet in the drive wheel has a tapered structure that is narrow in the middle and wide at both sides. A counterweight ring is provided in the cooling chamber of the drive wheel. The counterweight ring is located between the support ring and the neodymium iron boron magnet and can slide along the first direction. Two liquid bladders are provided between the support ring and the rubber ring of the drive wheel. The two liquid bladders are arranged sequentially in the first direction, and each liquid bladder is filled with expansion fluid.

[0013] Furthermore, a ball bearing is connected inside the counterweight ring via a first elastic element. The first elastic element is arranged along the radial direction of the counterweight ring, and the ball bearing can abut against the neodymium iron boron magnet.

[0014] Furthermore, there are three driver components.

[0015] The present invention also provides an automatic welding method for welding storage tanks, which utilizes the above-mentioned automatic welding device for welding storage tanks and includes the following steps:

[0016] S100, the wheel body is brought into contact with the surface of the storage tank to be welded. The wheel body will be attracted to the surface of the storage tank under the action of the neodymium iron boron magnet, and the welding gun is aimed at the weld seam.

[0017] S200: Start the welding torch to weld the seam, and power on the dual-output shaft motor to drive the wheels on both sides to rotate synchronously. At the same time, start the liquid pump to deliver coolant to the cooling chamber to cool the neodymium iron boron magnet.

[0018] The beneficial effects of the present invention are as follows: The automatic welding device for tank welding of the present invention utilizes a cooling chamber in conjunction with neodymium iron boron magnets and a liquid pump. During welding, the coolant can flow in the cooling chamber and exchange heat with the neodymium iron boron magnets to cool them down. This avoids the weakening of the magnetism of the neodymium iron boron magnets due to high temperature after long-term welding work, ensuring the attraction force of the drive wheel to the tank, preventing the welding carriage from deviating or falling off, and ensuring the normal progress of welding. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the overall structure of an embodiment of an automatic welding device for tank welding according to the present invention;

[0021] Figure 2 This is a side view of the overall structure of an embodiment of an automatic welding device for tank welding according to the present invention;

[0022] Figure 3 The image shows a bottom view of the overall structure of an embodiment of an automatic welding apparatus for tank welding according to the present invention.

[0023] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0024] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0025] Figure 6 This is a cross-sectional view of the overall structure of an embodiment of an automatic welding device for tank welding according to the present invention;

[0026] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0027] Figure 8 This is a schematic diagram of a partial structure of an embodiment of an automatic welding device for tank welding according to the present invention;

[0028] Figure 9 This is an exploded view of a partial structure of an embodiment of an automatic welding apparatus for tank welding according to the present invention.

[0029] In the diagram: 100, welding torch; 200, housing; 201, chassis; 202, outer shell; 203, handle; 300, drive assembly; 310, dual-output shaft motor; 311, output shaft; 312, return channel; 313, liquid inlet channel; 314, first channel; 315, second channel; 316, connecting port; 320, drive wheel; 321, neodymium iron boron magnet; 322, cooling chamber; 323, support ring; 324, rubber ring; 325. Steel sheet; 326. Magnetic sleeve; 330. Liquid collecting ring; 331. Inlet; 332. Outlet; 340. Transmission component; 341. Motor; 342. Gear; 343. Rack; 344. Mounting bracket; 350. First shaft section; 360. Second shaft section; 361. Friction ring; 362. Limit bolt; 370. Spring coupling; 380. Counterweight ring; 381. First elastic element; 382. Ball bearing; 390. Liquid bladder. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] An embodiment of the automatic welding apparatus for tank welding according to the present invention, such as... Figures 1 to 9 As shown.

[0032] An automatic welding device for welding storage tanks includes a welding carriage and a welding torch 100. The welding carriage includes a housing 200 and multiple drive components 300. The welding torch 100 is mounted on the housing 200. Each drive component 300 includes a dual-output shaft motor 310 and two drive wheels 320. The dual-output shaft motors 310 of the multiple drive components 300 are all mounted inside the housing 200. Each drive wheel 320 includes a wheel body and a neodymium iron boron magnet 321. The wheel bodies of the two drive wheels 320 are respectively mounted on the two output shafts 311 of the dual-output shaft motors 310 and are capable of moving along the extension direction of the weld seam on the storage tank. The wheel body has a cooling chamber 322, and the neodymium iron boron magnet 321 is installed inside the cooling chamber 322. A liquid pump is provided inside the housing 200, which can deliver coolant to the cooling chamber 322.

[0033] Specifically, the drive assembly 300 has three components. The housing 200 includes a chassis 201 and an outer shell 202, with the chassis 201 fixedly connected to the outer shell 202. The dual-output shaft motor 310 is mounted on the chassis 201. The outer shell 202 is provided with a handle 203 for easy handling by the operator.

[0034] In this embodiment, a welding carriage is set up, and a welding torch 100 is mounted on the carriage's housing 200. When welding is required on the storage tank, the welding carriage is moved to the starting position of the weld seam to be welded, so that the wheels abut against the surface of the storage tank. The neodymium iron boron magnets 321 inside the wheels generate magnetic force, stably adhering the welding carriage to the surface of the storage tank. Then, the welding torch 100 can be started to begin automatic or semi-automatic arc welding operations. The welding torch 100 generates an arc to melt the metal at the weld seam, performing the welding operation.

[0035] Simultaneously, multiple drive components 300 of the welding carriage are activated, and the dual-output shaft motor 310 is powered on, driving the wheels on both sides to rotate synchronously. This drives the welding carriage and welding torch 100 to move along the extension direction of the weld seam on the storage tank, achieving continuous welding. At the same time as welding begins, the liquid pump inside the shell 200 is activated. The liquid pump pressurizes the coolant and sends it into the cooling chamber 322. The coolant flows within the cooling chamber 322 and exchanges heat with the neodymium iron boron magnet 321. The cooling chamber 322, in conjunction with the neodymium iron boron magnet 321 and the liquid pump, cools the neodymium iron boron magnet 321, thus preventing the magnetism of the neodymium iron boron magnet 321 from weakening due to high temperatures after prolonged welding work. This ensures the attraction of the drive wheel 320 to the storage tank and prevents the welding carriage from shifting or falling off.

[0036] In a further embodiment, the wheel body includes a support ring 323, a rubber ring 324, and two steel plates 325. The support ring 323 is mounted on the output shaft 311 of the dual-output shaft motor 310. The cooling cavity 322 is defined by the support ring 323 and the output shaft 311 of the dual-output shaft motor 310, and the cooling cavity 322 is an annular cavity. The rubber ring 324 is fixedly mounted outside the support ring 323, and the two steel plates 325 are respectively fixedly mounted to both ends of the neodymium iron boron magnet 321 in a first direction, which is the axial direction of the output shaft 311 of the dual-output shaft motor 310.

[0037] Furthermore, a magnetic sleeve 326 is provided between the output shaft 311 of the dual-output shaft motor 310 and the neodymium iron boron magnet 321. The magnetic sleeve 326 is made of a high magnetic permeability material and is fixedly connected to the output shaft 311 of the dual-output shaft motor 310.

[0038] By setting a magnetic sleeve 326, the output shaft 311 of the dual-shaft motor 310 is separated from the neodymium iron boron magnet 321, and the magnetic force is transmitted to the steel sheet 325; and in order to reduce electromagnetic interference, the output shaft 311 of the dual-shaft motor 310 can be made of a low magnetic permeability material to ensure smooth mechanical transmission.

[0039] In this embodiment, by setting up a support ring 323, a rubber ring 324, and two steel plates 325, when welding is required on the storage tank, the welding carriage is moved to the starting position of the weld to be welded on the storage tank, so that the rubber ring 324 and the steel plates 325 abut against the surface of the storage tank to be welded. The neodymium iron boron magnet 321 generates magnetic force and transmits the magnetic force to the steel plates 325. The part of the steel plate 325 that is in contact with the outer wall of the storage tank will deform after being compressed. By using the adsorption of the steel plate 325 with the storage tank, the welding carriage can be stably adsorbed on the surface of the storage tank.

[0040] In a further embodiment, each output shaft 311 of the dual-output-shaft motor 310 is provided with a liquid collecting ring 330, which has an inlet 331 and an outlet 332. Both the inlet 331 and the outlet 332 are connected to a liquid pump via connecting pipes. Each output shaft 311 of the dual-output-shaft motor 310 has a flow channel, and the liquid collecting ring 330 is correspondingly arranged with each flow channel. The flow channel includes a return channel 312 and two inlet channels 313. One end of each of the two inlet channels 313 is connected to the inlet 331 of the corresponding liquid collecting ring 330. Each steel plate 325 has a first channel 314, which is correspondingly arranged with each inlet channel 313. The other end of the first channel 314 and the corresponding inlet channel 313 are connected, and both first channels 314 are connected to the cooling chamber 322. Specifically, the support ring 323 has a connecting port 316 for connecting the first channel 314 and the cooling cavity 322.

[0041] One end of the return channel 312 is connected to the outlet 332 of the corresponding liquid collection ring 330. A second channel 315 is provided on the magnetic sleeve 326, and a third channel is provided on the neodymium iron boron magnet 321. The second channel 315 and the third channel are connected. The other end of the return channel 312 is connected to the cooling chamber 322 through the second channel 315 and the third channel.

[0042] In operation, the liquid pump is started, delivering coolant to the inlet 331 of the liquid collection ring 330. The coolant then enters two inlet channels 313 and flows along them, eventually passing through the first channel 314 and the connecting port 316 into the cooling chamber 322. Within the cooling chamber 322, the coolant flows freely and exchanges heat with the neodymium iron boron magnets 321, absorbing the heat generated by the magnets. After heat exchange, the coolant flows back through the second channel 315 and the third channel to the return channel 312, ultimately returning to the liquid collection ring 330 and then flowing back to the liquid pump from the outlet 332. The coolant is then recovered by the pump, dissipating heat to the outside and circulating the coolant, forming a closed loop.

[0043] Furthermore, the first channel 314 includes multiple branch channels, which are arranged radially along the output shaft 311 of the dual-output shaft motor 310. The output shaft 311 of the dual-output shaft motor 310 and the steel plate 325 define a liquid distribution chamber, which is an annular cavity. The liquid inlet channel 313 is connected to the multiple branch channels through the liquid distribution chamber, and the multiple branch channels are all connected to the cooling cavity 322.

[0044] By setting up multiple branch channels, when the coolant enters the inlet channel 313 from the inlet 331 of the liquid collection ring 330, the coolant will flow through the inlet channel 313 to the distribution chamber, and then be distributed through the distribution chamber to multiple branch channels, and then flow through the branch channels to the cooling chamber 322, so as to increase the heat exchange rate and improve the cooling effect.

[0045] In a further embodiment, a transmission member 340 is provided on the housing 200, which is used to drive the welding torch 100 to move along a first direction.

[0046] The transmission component 340 includes a motor 341, a gear 342, and a rack 343. The motor 341 is fixedly mounted on the outer shell 202 of the housing 200. The gear 342 is fixedly mounted on the output shaft 311 of the motor 341. The rack 343 is arranged along a first direction and is slidably mounted on the outer shell 202 of the housing 200, meshing with the gear 342. A mounting bracket 344 is connected to the rack 343, and the welding torch 100 is mounted on the mounting bracket 344.

[0047] In this embodiment, by setting up a transmission component 340, when in use, the motor 341 starts and drives the gear 342 to rotate. The rotation of the gear 342 drives the rack 343 to move. The movement of the rack 343 drives the welding torch 100 to move through the mounting bracket 344. The transmission component 340 drives the welding torch 100 to move along the first direction, so that the welding torch 100 can be aligned with the weld seam to be welded on the storage tank.

[0048] In another possible embodiment, see Figures 6 to 9 As shown.

[0049] In a plurality of drive components 300, one output shaft 311 of the dual-output shaft motor 310 of one of the drive components 300 is referred to as the first shaft. The first shaft includes a first shaft segment 350 and a second shaft segment 360. The first shaft segment 350 is mounted on the dual-output shaft motor 310, and the first shaft segment 350 and the second shaft segment 360 are connected by a spring coupling 370. One drive wheel 320 of the drive component 300 is mounted on the second shaft segment 360, and in a first direction, the neodymium iron boron magnet 321 in the drive wheel 320 has a tapered structure that is narrow in the middle and wide at both sides. A counterweight ring 380 is provided in the cooling cavity 322 of the drive wheel 320. The counterweight ring 380 is located between the support ring 323 and the neodymium iron boron magnet 321 and can slide in the first direction. The sliding of the counterweight ring 380 in the cooling cavity 322 can block one of the connecting ports 316, preventing the coolant from flowing smoothly. A ball bearing 382 is connected to the counterweight ring 380 via a first elastic element 381. The first elastic element 381 is arranged along the radial direction of the counterweight ring 380 and is a spring. The ball bearing 382 can abut against the neodymium iron boron magnet 321. Two liquid bladders 390 are arranged between the support ring 323 and the rubber ring 324 of the drive wheel 320. The two liquid bladders 390 are arranged sequentially in the first direction, and each liquid bladder 390 is filled with a low-boiling-point expanding liquid.

[0050] The neodymium iron boron magnet 321 has a slide rail arranged along a first direction, and the ball bearing 382 slides in contact with the slide rail. By setting the slide rail, the movement of the ball bearing 382 can be limited to prevent it from rotating.

[0051] The outer shell 202 of the housing 200 has a waist-shaped groove, and a friction ring 361 is fitted onto the second shaft section 360, with the friction ring 361 located within the waist-shaped groove. By setting the friction ring 361, when the second shaft section 360 swings, the friction ring 361 rubs against the waist-shaped groove, reducing the wear of the second shaft section 360. At the same time, the waist-shaped groove can limit the swing direction of the second shaft section 360.

[0052] Furthermore, a limiting bolt 362 is screwed onto the outer casing 202, and the limiting bolt 362 extends into the oblong groove. By setting the limiting bolt 362, the amplitude of the swing of the second shaft segment 360 can be adjusted.

[0053] When the drive wheel 320 moves laterally in the horizontal plane to weld the seam extending laterally, the output shaft 311 of the dual-axis motor 310 (set longitudinally) is perpendicular to the seam to be welded. Although friction hinders the longitudinal movement of the welding carriage under the influence of magnetic force, the component of friction used to resist gravity decreases during the lateral movement of the welding carriage. This causes the welding carriage to tend to move longitudinally during welding, which in turn causes the welding torch 100 to deviate, affecting the welding process. In this embodiment, a counterweight ring 380 is provided on the drive wheel 320 of one of the drive components 300. When the drive wheel 320 moves laterally to weld the seam extending laterally, the counterweight ring 380 will slide along the first direction (longitudinal) under the influence of gravity, participating in... Figure 7 As shown, the counterweight ring 380 slides to the side below the cooling chamber 322, compressing the first elastic element 381 and blocking the lower connecting port 316. This obstructs the flow of coolant from below, reducing heat exchange efficiency and causing the liquid in the lower liquid bladder 390 to vaporize and expand. This deforms the rubber ring 324 into a tapered structure that is thinner at the top and thicker at the bottom. This, in turn, causes the entire drive wheel 320 to sway relative to the first shaft section 350 via the second shaft section 360. Furthermore, when the dual-output shaft motor 310 drives the drive wheel 320 to rotate, at the same angular velocity, due to the deformation of the rubber ring 324, the diameters at both ends of the drive wheel 320 are no longer the same. The linear velocity of the lower portion increases relatively, causing the entire drive wheel 320 to tend to move upwards, thus counteracting the influence of the welding carriage's gravity and improving welding stability.

[0054] When the drive wheel 320 moves longitudinally to weld the seam extending longitudinally, the output shaft 311 of the dual-shaft motor 310 (arranged laterally) is perpendicular to the seam to be welded. The counterweight ring 380 will slide to its center under the pressure of the conical surface on the neodymium iron boron magnet 321. At this time, the first elastic element 381 will cause the ball bearing 382 to pop out, creating a gap between the counterweight ring 380 and the neodymium iron boron magnet 321, allowing coolant to pass through. The coolant can then enter the cooling chamber 322 for normal cooling. Even if the welding carriage tends to move longitudinally under gravity, the welding torch 100 will not deviate because it moves longitudinally; therefore, this condition is not considered.

[0055] The present invention also provides an automatic welding method for welding storage tanks, which utilizes the above-mentioned automatic welding device for welding storage tanks and includes the following steps:

[0056] S100, the wheel body is brought into contact with the surface of the storage tank to be welded. The wheel body will be attracted to the surface of the storage tank under the action of the neodymium iron boron magnet 321, and the welding gun 100 is aligned with the weld seam.

[0057] S200, start the welding torch 100 to weld the seam, and power on the dual-output shaft motor 310 to drive the wheels on both sides to rotate synchronously, driving the welding carriage and the welding torch 100 to move along the extension direction of the weld seam on the storage tank to achieve continuous welding. At the same time, start the liquid pump to deliver coolant to the cooling chamber 322 to cool the neodymium iron boron magnet 321.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic welding device for welding storage tanks, characterized in that: The system includes a welding carriage and a welding torch. The welding carriage comprises a housing and multiple drive components. The welding torch is mounted on the housing. Each drive component includes a dual-output shaft motor and two drive wheels. The dual-output shaft motors of the multiple drive components are all installed inside the housing. Each drive wheel includes a wheel body and a neodymium iron boron magnet. The two wheel bodies are respectively mounted on the two output shafts of the dual-output shaft motors and can move along the extension direction of the weld seam on the tank. The wheel body has a cooling chamber, and the neodymium iron boron magnet is installed inside the cooling chamber. A liquid pump is installed inside the housing, which can deliver coolant to the cooling chamber. The wheel body includes a support ring, a rubber ring, and... Two steel plates and a support ring are mounted on the output shaft of the dual-output-shaft motor. The cooling chamber is defined by the support ring and the output shaft of the dual-output-shaft motor and is an annular cavity. A rubber ring is mounted outside the support ring. The two steel plates are respectively mounted on both ends of the neodymium iron boron magnet in a first direction, which is the axial direction of the output shaft of the dual-output-shaft motor. A magnetic sleeve made of a high-permeability material is provided between the output shaft of the dual-output-shaft motor and the neodymium iron boron magnet. Each output shaft of the dual-output-shaft motor is provided with a liquid collecting ring, which has an inlet and an outlet. Both the inlet and outlet are connected to... The connecting pipe is connected to the liquid pump; each output shaft of the dual-output shaft motor has a flow channel, and a liquid collecting ring is correspondingly set to each flow channel. The flow channel includes one return channel and two inlet channels. One end of each of the two inlet channels is connected to the inlet of the corresponding liquid collecting ring. Each steel plate has a first channel, which is correspondingly set to each inlet channel, and the other end of the first channel is connected to the corresponding inlet channel. Both first channels are connected to the cooling chamber; one end of the return channel is connected to the outlet of the corresponding liquid collecting ring. The drive wheel has a second channel on the magnetic sleeve and a third channel on the neodymium iron boron magnet. The second and third channels are connected, and the other end of the return channel is connected to the cooling chamber through the second and third channels. The support ring has a connecting port for connecting the first channel and the cooling chamber. A counterweight ring is provided in the cooling chamber of the drive wheel. The counterweight ring is located between the support ring and the neodymium iron boron magnet and can slide along the first direction. Two liquid bladders are provided between the support ring and the rubber ring of the drive wheel. The two liquid bladders are arranged sequentially in the first direction, and each liquid bladder is filled with expansion liquid.

2. The automatic welding device for tank welding according to claim 1, characterized in that: The housing is provided with a transmission component, which includes a motor, a gear, and a rack. The motor is mounted on the housing, the gear is fixedly mounted on the output shaft of the motor, the rack is arranged along a first direction, the rack is slidably mounted on the housing and meshes with the gear, a mounting bracket is connected to the rack, and the welding torch is mounted on the mounting bracket.

3. The automatic welding device for tank welding according to claim 2, characterized in that: One of the output shafts of the dual-output shaft motor of one of the drive components is referred to as the first shaft. The first shaft includes a first shaft segment and a second shaft segment. The first shaft segment is mounted on the dual-output shaft motor, and the first shaft segment and the second shaft segment are connected by a spring coupling. One of the drive wheels of the drive component is mounted on the second shaft segment, and in a first direction, the neodymium iron boron magnet in the drive wheel has a tapered structure that is narrow in the middle and wide at both sides.

4. An automatic welding device for tank welding according to claim 3, characterized in that: A ball bearing is connected inside the counterweight ring via a first elastic element. The first elastic element is arranged along the radial direction of the counterweight ring, and the ball bearing can abut against the neodymium iron boron magnet.

5. An automatic welding device for tank welding according to claim 1, characterized in that: There are three driver components.

6. An automatic welding method for welding storage tanks, utilizing an automatic welding device for welding storage tanks as described in any one of claims 1 to 5, characterized in that: Includes the following steps: S100, the wheel body is brought into contact with the surface of the storage tank to be welded. The wheel body will be attracted to the surface of the storage tank under the action of the neodymium iron boron magnet, and the welding gun is aimed at the weld seam. S200: Start the welding torch to weld the seam, and power on the dual-output shaft motor to drive the wheels on both sides to rotate synchronously. At the same time, start the liquid pump to deliver coolant to the cooling chamber to cool the neodymium iron boron magnet.

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