Tank body end cover automatic arc welding equipment for tank car

Abstract

The invention relates to the technical field of welding, in particular to tank end cover automatic arc welding equipment for a tank truck, which comprises an erected sucker, a lifting sleeve in threaded connection with the upper end of the erected sucker, a welding machine main body fixedly connected with the upper end of the lifting sleeve, a support frame fixedly connected with the surface of the welding machine main body, and a traveling motor fixedly connected with the lower end of the support frame. The output end of the advancing motor is fixedly connected with an advancing gear, and the outer surface of the advancing gear meshes with a rotating frame. The welding gun can move along a welding gap by arranging the advancing rail rod, the arc welding corner position can be more stable by arranging the two sets of sliding seats and connecting the sliding seats through the connecting rod, the welding gun can be always attached to the advancing rail rod in the moving process by arranging the extending column, the welding gun can move along a welding seam, and the welding efficiency is improved. And the effect that stable sliding welding is conducted by attaching to the weld joint is achieved, and the problem that when welding is conducted along a three-dimensional arc, movement is not smooth enough, discontinuity occurs, or the standing time is too long during welding is solved.

Description

Technical Field

[0001] The present application relates to the field of welding technology, and in particular to an automatic arc welding device for a tank end cover of a tank truck. Background Art

[0002] Welding, also known as fusion, is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. There are many sources of energy for modern welding, including gas flame, arc, laser, electron beam, friction and ultrasound. In addition to being used in factories, welding can also be performed in a variety of environments, such as outdoors, underwater and in space. No matter where it is, welding may be dangerous to the operator, so appropriate protective measures must be taken when welding. Possible injuries to the human body caused by welding include burns, electric shock, visual impairment, inhalation of toxic gases, excessive ultraviolet radiation, etc.

[0003] Through searching, Chinese patent announcement No. CN107953007A discloses arc welding equipment including a fixing fixture for clamping the workpiece to be welded, and a soldering rotating device and a tin wire feeding device installed on a mounting bracket, the soldering rotating device including a first motor, and a first cylinder and an electric soldering iron driven and connected to the first motor, the first cylinder being driven and connected to the electric soldering iron, the first motor being installed directly above the fixing fixture, and the axis of its output shaft being in the same straight line with the axis of the workpiece to be welded, the tin wire feeding device being installed on one side of the first motor, the tin wire led out of the motor being tilted toward the workpiece to be welded, the electric soldering iron being tilted and installed on the first motor so that the heating end of the electric soldering iron is tilted toward the workpiece to be welded, and a heating inclined surface facing the tin wire feeding device is provided on the side wall of the heating end, and the heating inclined surface is tilted downward relative to the axial direction of the electric soldering iron.

[0004] Through searching, Chinese patent announcement number CN221313009U discloses an automatic arc welding type welding machine including a welding gun, the welding gun is fixed on the piston rod of a single-rod electric cylinder, the cylinder body of the single-rod electric cylinder is fixed on the output shaft of a rotating motor, the two rotating motors are both mounted on a gear opening and closing mechanism, the gear opening and closing mechanism is connected to a lifting mechanism, a product clamping and fixing mechanism is provided below the welding gun, the product clamping and fixing mechanism is connected to a product rotating mechanism, the product rotating mechanism is mounted on a horizontal linear moving mechanism, and a CCD camera is mounted on the lifting mechanism. The utility model drives two welding guns to align with the welding points of the product through a gear opening and closing mechanism in conjunction with two single-rod electric cylinders and two rotating motors. The product is driven to rotate by a product rotating mechanism, thereby realizing welding around the arc product.

[0005] With respect to the above-mentioned related technologies, it is believed that the following defects exist:

[0006] 1. The existing device cannot weld along the weld when welding a tank body or other three-dimensional arc in space. The device will cause welding interruption or too long welding dwell time, so the continuity of the arc in the three-dimensional space cannot be guaranteed.

[0007] 2. When welding the arc of a cylindrical surface such as a tank body, it is impossible to move smoothly with the weld, and the welding gun cannot always fit closely with the weld. Therefore, when welding the tank body arc, a cold weld will occur and the welding quality of the weld cannot be guaranteed.

[0008] 3. When the welding device is welding on the outer surface of the tank, it is difficult to locate the device on the cylindrical surface, and it is easy to slide and the welding position cannot be determined. Summary of the invention

[0009] In order to solve the problems mentioned in the background technology, the present application provides an automatic arc welding device for a tank end cover of a tank truck.

[0010] The present application provides an automatic arc welding device for a tank end cover of a tank truck, which adopts the following technical scheme: it includes a mounting suction cup, the upper end of the mounting suction cup is threadedly connected with a lifting sleeve, the upper end of the lifting sleeve is fixedly connected with a welding machine body, the surface of the welding machine body is fixedly connected with a support frame, the lower end of the support frame is fixedly connected with a travel motor, the output end of the travel motor is fixedly connected with a travel gear, the outer surface of the travel gear is meshed with a rotating frame, the lower end of the rotating frame is rotatably connected with a track ring, the surface of the track ring is slidably clamped with a positioning shell, the positioning shell is clamped with the rotating frame, the lower end of the track ring is fixedly connected with a mounting plate, the upper end of the mounting plate is fixedly connected with the support frame, the lower end of the positioning shell is fixedly connected with an extension column, and the lower end of the extension column is fixedly connected A placing frame is fixedly connected, a balancing frame is fixedly connected to the lower end of the placing frame, a solder feeding motor is fixedly connected to the inner side of the placing frame, a pushing shaft is fixedly connected to the output end of the solder feeding motor, a guiding correction bucket is fixedly connected to the surface of the placing frame, the inner side of the placing frame is rotatably connected to the solder placing frame, a feeding compensation motor is fixedly connected to the inner side of the balancing frame, a docking gear is fixedly connected to the output end of the feeding compensation motor, a pushing shaft is fixedly connected to the lower end of the docking gear, a welding gun is clamped on the surface of the pushing shaft, a connecting buckle is provided on the surface of the welding gun, a traveling track rod is connected to the upper surface of the mounting plate by screws, a sliding seat is slidably connected to the surface of the traveling track rod, a connecting rod is inlaid on the inner side of the sliding seat, and the surface of the connecting rod is rotatably connected to the balancing frame.

[0011] Optionally, the rotating frame is composed of a welding traveling ring and a welding pushing frame. The welding traveling ring has a circular ring shape and a notch is provided at the lower end of the welding traveling ring. The notch of the welding traveling ring is clamped on the outside of the positioning shell. The inner side of the welding traveling ring is fixedly connected to the welding pushing frame. The inner side of the welding pushing frame is provided with teeth and meshes with the traveling gear.

[0012] Optionally, the erection plate includes a vertical plate and a cross plate, the lower surface of the cross plate is provided with an anti-slip rubber strip, the cross plate is placed above the tank body, the upper end of the cross plate is fixedly connected to the vertical plate, and the upper end of the vertical plate is fixedly connected to the track ring.

[0013] Optionally, the extension column consists of an outer sleeve, an extension spring and an extension tube. The upper end of the outer sleeve is fixedly connected to the positioning shell, the inner side of the outer sleeve is fixedly connected to the extension spring, the lower end of the extension spring is fixedly connected to the extension tube, and the outer surface of the extension tube is slidably connected to the inner wall of the outer sleeve.

[0014] Optionally, there are two groups of pusher shafts, the upper ends of the pusher shafts are spur gears, the spur gears of the two groups of pusher shafts are meshed with each other, and the lower ends of the pusher shafts are round shafts, which have the function of clamping and pushing the solder.

[0015] Optionally, there are four pushing shafts in total, and each pair of pushing shafts is clamped on both sides of the welding gun in a group, and two groups of connecting buckles are provided on the surface of the welding gun, and the connecting buckles have the function of guiding the solder.

[0016] Optionally, the guiding and correcting bucket has a trumpet-shaped appearance, and the guiding and correcting bucket has the function of collecting and guiding the solder.

[0017] Optionally, the connecting rod is composed of a support rod, a connecting belt and a rotating disk. The middle end of the support rod is a round rod, and both ends of the support rod are spherical. Both ends of the support rod are embedded in the sliding seat. Both ends of the support rod are fixedly connected with a connecting belt. One end of the connecting belt is a traction rope and the other end is a disc. The connecting belt passes through the sliding seat, and a rotating disk is provided in the middle section of the connecting rod, which is rotatably connected to the balance frame.

[0018] Optionally, the traveling track rod is a predetermined welding route, the traveling track rod is bent along the welding position, and a base is provided at the lower end of the traveling track rod to be connected with the cross plate.

[0019] In summary, this application includes the following beneficial technical effects:

[0020] 1. The automatic arc welding equipment for the tank end cover of the tank truck enables the welding gun to move along the welding gap by setting a traveling track rod, and by setting two sets of sliding seats and connecting them with connecting rods, the arc welding corner position will be more stable, and by setting an extension column, the welding gun can always fit the traveling track rod during the movement, so that the welding gun can move along the weld, achieving the effect of fitting the weld for smooth sliding welding, and solving the problem of intermittent movement or too long dwell time during welding due to insufficient smoothness during welding along a three-dimensional arc.

[0021] 2. The automatic arc welding equipment for the tank end cover of the tank truck drives the docking gear to rotate through the feed compensation motor, so that the push shaft rotates to clamp the welding gun, so that the welding gun is close to the weld, and the push shaft is driven to rotate by the solder feed motor, so that the push shaft clamps and pushes the solder strip clamped on the surface of the solder placement frame, so that the solder passes through the guide correction bucket for correction, and the solder passes through the two sets of connecting buckles, so that the solder can be pushed in time for replenishment, and the travel motor drives the travel gear to rotate, so that the travel gear rotates the welding push frame, so that the welding push frame pushes the welding travel ring, and the welding travel ring pushes the positioning shell to slide and rotate on the surface of the track ring, and the positioning shell drives the extension column, so that the extension column drives the placement frame and the balance frame to move, so that the sliding seat slides on the surface of the travel track rod, so that the welding gun can contact the weld for welding during the rotation process, thereby achieving the effect of pushing the welding gun and the solder to fit the weld for welding, and solving the problem that the welding gun and the weld cannot always fit tightly and will cause false welding.

[0022] 3. The automatic arc welding equipment for the tank end cover of the tank truck sets up a setting plate on the tank surface of the tank truck, places a cross-plate on the tank surface and sets an anti-skid rubber strip on the lower surface of the cross-plate to make the setting plate more firmly placed, rotates the setting suction cup to make it rotate and extend inside the lifting sleeve, and sticks the setting suction cup above the weld to fix the device on the tank surface, thereby achieving the effect of setting up the device and fixing the welding position, and solving the problem that the outer surface of the tank body is easy to slide and cannot determine the welding position when welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the structure of the erection plate in the embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the structure of the traveling track rod in the embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of the welding gun structure in an embodiment of the present application;

[0027] Figure 5 This is a schematic diagram of the structure of the sliding seat in the embodiment of the present application;

[0028] Figure 6 This is a schematic diagram of the extension column structure in an embodiment of the present application;

[0029] Figure 7 This is a schematic diagram of the track ring structure in an embodiment of the present application;

[0030] Figure 8 It is a schematic diagram of the traveling gear structure in an embodiment of the present application.

[0031] 1. Mounting suction cup; 2. Lifting sleeve; 3. Welding machine body; 4. Support frame; 5. Traveling motor; 6. Traveling gear; 7. Rotating frame; 71. Welding traveling ring; 72. Welding pushing frame; 8. Track ring; 9. Positioning shell; 10. Mounting plate; 101. Vertical plate; 102. Cross plate; 11. Extension column; 111. Outer sleeve; 112. Extension spring; 113. Extension tube; 12. Placement frame; 13. Balance frame; 14. Solder feeding motor; 15. Pushing shaft; 16. Guide correction bucket; 17. Solder placement frame; 18. Feed compensation motor; 19. Docking gear; 20. Pushing shaft; 21. Welding gun; 22. Connecting buckle; 23. Traveling track rod; 24. Sliding seat; 25. Connecting rod; 251. Support rod; 252. Connecting belt; 253. Rotating disk. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-8 This application is described in further detail.

[0033] The present application embodiment discloses an automatic arc welding device for a tank end cover of a tank truck. Figure 1-8 As shown, it includes a mounting suction cup 1, the upper end of the mounting suction cup 1 is threadedly connected with a lifting sleeve 2, the mounting suction cup 1 can be fitted above the welding position, so that the device is fixed on the surface of the tank body, so that it will not move during the welding process, the upper end of the lifting sleeve 2 is fixedly connected with a welding machine body 3, the surface of the welding machine body 3 is fixedly connected with a support frame 4, the lower end of the support frame 4 is fixedly connected with a travel motor 5, the output end of the travel motor 5 is fixedly connected with a travel gear 6, the outer surface of the travel gear 6 is meshed with a rotating frame 7, and the lower end of the rotating frame 7 is rotatably connected with a track ring 8, A positioning shell 9 is slidably clamped on the surface of the track ring 8. The rotating frame 7 is composed of a welding traveling ring 71 and a welding pushing frame 72. The welding traveling ring 71 is a circular ring in shape. A notch is provided at the lower end of the welding traveling ring 71. The notch of the welding traveling ring 71 is clamped on the outer side of the positioning shell 9. A welding pushing frame 72 is fixedly connected to the inner side of the welding traveling ring 71. The inner side of the welding pushing frame 72 is provided with teeth and meshes with the traveling gear 6. The rotating frame 7 can be driven to rotate by the traveling gear 6, so that the positioning shell 9 can be pushed by the welding traveling ring 71 to move along the track ring 8.

[0034] The positioning shell 9 is clamped with the rotating frame 7, the lower end of the track ring 8 is fixedly connected to the mounting plate 10, the upper end of the mounting plate 10 is fixedly connected to the support frame 4, the mounting plate 10 includes a vertical plate 101 and a cross plate 102, the lower surface of the cross plate 102 is provided with an anti-slip rubber strip, the cross plate 102 is placed above the tank body, the upper end of the cross plate 102 is fixedly connected to the vertical plate 101, the upper end of the vertical plate 101 is fixedly connected to the track ring 8, and the mounting plate 10 facilitates the mounting and fixing of the welding device on the surface of the tank body.

[0035] An extension column 11 is fixedly connected to the lower end of the positioning shell 9, a placement frame 12 is fixedly connected to the lower end of the extension column 11, a balance frame 13 is fixedly connected to the lower end of the placement frame 12, a solder feeding motor 14 is fixedly connected to the inner side of the placement frame 12, a push shaft 15 is fixedly connected to the output end of the solder feeding motor 14, there are two groups of push shafts 15, the upper ends of the push shafts 15 are spur gears, the spur gears of the two groups of push shafts 15 are meshed with each other, the lower ends of the push shafts 15 are round shafts, the round shafts of the push shafts 15 have the function of clamping and pushing the solder, the push shafts 15 can rotate to push the solder to be replenished in time, so that welding can be carried out continuously.

[0036] A guide correction bucket 16 is fixedly connected to the surface of the placement frame 12, and the inner side of the placement frame 12 is rotatably connected to the solder placement frame 17. A feed compensation motor 18 is fixedly connected to the inner side of the balance frame 13, and a docking gear 19 is fixedly connected to the output end of the feed compensation motor 18. A driving shaft 20 is fixedly connected to the lower end of the docking gear 19, and a welding gun 21 is clamped on the surface of the driving shaft 20. The guide correction bucket 16 is trumpet-shaped in shape, and has the function of collecting and guiding the solder. The guide correction bucket 16 can correct the solder so that the solder can be close to the welding gun 21.

[0037] There are four pushing shafts 20, and each pair of pushing shafts 20 is clamped on both sides of the welding gun 21. Two groups of connecting buckles 22 are provided on the surface of the welding gun 21. The connecting buckles 22 have the function of guiding the solder. The pushing shafts 20 can push the welding gun 21 to move, so that the welding gun 21 can perform position compensation in time and approach the weld.

[0038] A connecting buckle 22 is provided on the surface of the welding gun 21, and the extension column 11 is composed of an outer sleeve 111, an extension spring 112 and an extension tube 113. The upper end of the outer sleeve 111 is fixedly connected to the positioning shell 9, the inner side of the outer sleeve 111 is fixedly connected to the extension spring 112, and the lower end of the extension spring 112 is fixedly connected to the extension tube 113. The outer surface of the extension tube 113 is slidably connected to the inner wall of the outer sleeve 111, and the extension column 11 can press and push the placement frame 12 to make the welding gun 21 fit the weld.

[0039] The upper surface of the mounting plate 10 is connected with a travel track rod 23 by screws. The travel track rod 23 is a predetermined welding route. The travel track rod 23 is bent along the welding position. A base is provided at the lower end of the travel track rod 23 and is connected to the cross plate 102. The travel track rod 23 enables the welding gun 21 to move along the weld seam while moving, thereby ensuring the accuracy of the welding position.

[0040] A sliding seat 24 is slidably connected to the surface of the traveling track rod 23, and a connecting rod 25 is inlaid on the inner side of the sliding seat 24. The connecting rod 25 is composed of a support rod 251, a connecting belt 252 and a rotating disk 253. The middle end of the support rod 251 is a round rod, and both ends of the support rod 251 are spherical. Both ends of the support rod 251 are embedded with the sliding seat 24, and both ends of the support rod 251 are fixedly connected with a connecting belt 252. One end of the connecting belt 252 is a traction rope and the other end is a disc. The connecting belt 252 runs through the sliding seat 24. A rotating disk 253 is provided in the middle section of the connecting rod 25. The rotating disk 253 is rotatably connected to the balancing frame 13. The connecting rod 25 can connect the two groups of sliding seats 24, so that the sliding seat 24 can push the balancing frame 13 more smoothly when moving on the surface of the traveling track rod 23. The surface of the connecting rod 25 is rotatably connected to the balancing frame 13.

[0041] The implementation principle of the automatic arc welding device for the tank end cover of a tank truck in the embodiment of the present application is as follows: when in use, firstly, the erection plate 10 is erected on the surface of the tank body of the tank truck, and the cross plate 102 is placed on the surface of the tank body, and the erection suction cup 1 is rotated to make it rotate and extend inside the lifting sleeve 2, and the erection suction cup 1 is attached to the top of the weld to fix the device on the surface of the tank body, and the travel track rod 23 adapted to the weld is installed, and when welding is required, the welding machine body 3 is started to make the welding gun 21 work, and the feed compensation motor 18 is started to drive the docking gear 19 to rotate, so that the push shaft 20 rotates to clamp the welding gun 21, so that the welding gun 21 is close to the weld, and the solder feed motor 14 is started to drive the push shaft 15 to rotate, so that the push shaft 15 clamps and pushes the solder strip clamped on the surface of the solder placement rack 17, so that the solder passes through the guide The guide correction bucket 16 is corrected so that the solder passes through the two sets of connecting buckles 22, so that the solder can be pushed in time for replenishment, and the travel motor 5 is started to drive the travel gear 6 to rotate, so that the travel gear 6 rotates the welding push frame 72, and the welding push frame 72 drives the welding travel ring 71 to rotate, so that the welding travel ring 71 drives the positioning shell 9 to slide and rotate on the surface of the track ring 8, and the extension column 11 is driven by the positioning shell 9, so that the extension column 11 drives the placement frame 12 and the balance frame 13 to move, so that the sliding seat 24 slides on the surface of the travel track rod 23, and the two sets of sliding seats 24 are kept stable by the connecting rod 25 when moving, so that the balance frame 13 moves smoothly, so that the welding gun 21 can contact the weld for welding during the rotation process, and the extension column 11 is extended in time during the movement so that the welding gun 21 can always fit the weld.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic arc welding device for a tank end cover of a tank truck, comprising a mounting suction cup (1), characterized in that: The upper end of the erection suction cup (1) is threadedly connected with a lifting sleeve (2), the upper end of the lifting sleeve (2) is fixedly connected with a welding machine body (3), the surface of the welding machine body (3) is fixedly connected with a support frame (4), the lower end of the support frame (4) is fixedly connected with a travel motor (5), the output end of the travel motor (5) is fixedly connected with a travel gear (6), the outer surface of the travel gear (6) is meshed with a rotating frame (7), the lower end of the rotating frame (7) is rotatably connected with a track ring (8), the surface of the track ring (8) is slidably engaged with a positioning shell (9), the positioning shell (9) is engaged with the rotating frame (7), the lower end of the track ring (8) is fixedly connected with a erection plate (10), the upper end of the erection plate (10) is fixedly connected with the support frame (4), the lower end of the positioning shell (9) is fixedly connected with an extension column (11), and the extension column (12) is fixedly connected with the support frame (4). The lower end of the extension column (11) is fixedly connected to a placement frame (12), the lower end of the placement frame (12) is fixedly connected to a balance frame (13), the inner side of the placement frame (12) is fixedly connected to a solder feeding motor (14), the output end of the solder feeding motor (14) is fixedly connected to a push shaft (15), the surface of the placement frame (12) is fixedly connected to a guide correction bucket (16), the inner side of the placement frame (12) is rotatably connected to a solder placement frame (17), the inner side of the balance frame (13) is fixedly connected to a feed compensation motor (18), the output end of the feed compensation motor (18) is fixedly connected to a docking gear (19), the lower end of the docking gear (19) is fixedly connected to a driving shaft (20), the surface of the driving shaft (20) clamps a welding gun (21), and the surface of the welding gun (21) is provided with a connecting buckle (22); The upper surface of the mounting plate (10) is connected to a traveling track rod (23) by screws, the surface of the traveling track rod (23) is slidably connected to a sliding seat (24), a connecting rod (25) is embedded inside the sliding seat (24), and the surface of the connecting rod (25) is rotatably connected to the balancing frame (13).

2. The automatic arc welding equipment for tank end cover of a tank truck according to claim 1 is characterized by: The rotating frame (7) is composed of a welding advancing ring (71) and a welding pushing frame (72). The welding advancing ring (71) is in the shape of a circular ring. A notch is arranged at the lower end of the welding advancing ring (71). The notch of the welding advancing ring (71) is clamped on the outer side of the positioning shell (9). The inner side of the welding advancing ring (71) is fixedly connected with the welding pushing frame (72). The inner side of the welding pushing frame (72) is provided with teeth and meshes with the advancing gear (6).

3. The automatic arc welding equipment for tank end cover of a tank truck according to claim 1 is characterized in that: The erection plate (10) comprises a vertical plate (101) and a cross plate (102); the lower surface of the cross plate (102) is provided with an anti-slip rubber strip; the cross plate (102) is placed above the tank body; the upper end of the cross plate (102) is fixedly connected to the vertical plate (101); and the upper end of the vertical plate (101) is fixedly connected to the track ring (8).

4. The automatic arc welding equipment for tank end cover of a tank truck according to claim 1, characterized in that: The extension column (11) is composed of an outer sleeve (111), an extension spring (112) and an extension tube (113); the upper end of the outer sleeve (111) is fixedly connected to the positioning shell (9); the inner side of the outer sleeve (111) is fixedly connected to the extension spring (112); the lower end of the extension spring (112) is fixedly connected to the extension tube (113); and the outer surface of the extension tube (113) is slidably connected to the inner wall of the outer sleeve (111).

5. The automatic arc welding equipment for tank end cover of a tank truck according to claim 1 is characterized by: There are two groups of pusher shafts (15), the upper ends of the pusher shafts (15) are spur gears, the spur gears of the two groups of pusher shafts (15) are meshed with each other, and the lower ends of the pusher shafts (15) are round shafts, which have the function of clamping and pushing the solder.

6. The automatic arc welding equipment for tank end cover of a tank truck according to claim 1, characterized in that: There are four driving shafts (20) in total. Each group of two driving shafts (20) is clamped on both sides of a welding gun (21). Two groups of connecting buckles (22) are arranged on the surface of the welding gun (21). The connecting buckles (22) have the function of guiding solder.

7. The automatic arc welding equipment for tank end cover of a tank truck according to claim 1 is characterized by: The guiding and correcting bucket (16) has a trumpet-shaped appearance and has the function of collecting and guiding solder.

8. The automatic arc welding equipment for tank end cover of a tank truck according to claim 1, characterized in that: The connecting rod (25) is composed of a supporting rod (251), a connecting belt (252) and a rotating disk (253). The middle end of the supporting rod (251) is a round rod. Both ends of the supporting rod (251) are spherical. Both ends of the supporting rod (251) are engaged with the sliding seat (24). Both ends of the supporting rod (251) are fixedly connected with a connecting belt (252). One end of the connecting belt (252) is a traction rope and the other end is a disk. The connecting belt (252) passes through the sliding seat (24). The middle section of the connecting rod (25) is provided with a rotating disk (253). The rotating disk (253) is rotatably connected to the balance frame (13).

9. The automatic arc welding equipment for tank end cover of a tank truck according to claim 3, characterized in that: The traveling track rod (23) is a predetermined welding route. The traveling track rod (23) is bent along the welding position. A base is provided at the lower end of the traveling track rod (23) and is connected to the cross plate (102).

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