A longitudinal seam welding device for a rod body

Abstract

The present invention relates to the technical field of welding devices, and specifically discloses a longitudinal seam welding device for a rod body, which includes a welding frame, a moving frame, a welding assembly, a material blocking assembly, an adjusting assembly and a grinding assembly. The material blocking assembly includes a fixing plate and two baffles. The fixing plate is connected to a flux funnel. The two baffles are respectively longitudinally slidably arranged on both sides of the flux funnel. The adjusting assembly includes two adjusting rods and a first linkage structure. The two adjusting rods are respectively arranged on both sides of the flux funnel. One end of the adjusting rod is hinged to the fixing plate, and the other end contacts the outer wall of the rod body on the corresponding side of the weld seam. The first linkage structure can drive the baffle to move up and down relative to the fixing plate when the angle of the adjusting rod changes. The grinding assembly includes a grinding structure and a cleaning structure. The present invention can adjust the position of the baffle according to the shape of the rod body, so that the baffle can adapt to rod bodies of different shapes, and at the same time can clean the impurities in the welding area to ensure the welding effect.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices, and particularly relates to a longitudinal seam welding device for a rod body. Background Art

[0002] In an era of gradually increasing environmental awareness, wind power generation, as a clean and renewable energy source, has received extensive attention. Among them, the wind power tower pole is the rod body of wind power generation, which mainly plays a supporting role in the wind turbine generator set and absorbs the vibration of the unit at the same time. When producing such a rod body, it is first pressed by a bending machine and then becomes a polygonal or circular cylindrical structure with a longitudinal seam. Then, a positioning mechanism is used to position the bent cylindrical structure, and finally, the cylindrical structure with a longitudinal seam is welded. Most of the related technologies use submerged arc welding devices to weld the longitudinal seams on the rod body.

[0003] The patent document with the authorization announcement number CN115007978B discloses an auxiliary tool and usage method for submerged arc welding flux, including a flux feeding pipe fitting and a fixing frame. The flux feeding pipe fitting is detachably connected to the welding torch gun head, and the flux feeding pipe fitting is provided with a pipeline for delivering the flux to the bottom of the welding torch gun head; the fixing frame is sleeved outside the flux feeding pipe fitting and is detachably connected to the flux feeding pipe fitting. The fixing frame includes a U-shaped frame body perpendicular to the welding torch gun head. The U-shaped frame body is clamped with the flux feeding pipe fitting, and the U-shaped frame body is provided with a baffle plate to block the flux from falling. During welding, the flux is delivered to the welding torch gun head through the flux feeding pipe fitting, and the baffle plate moves along with the movement of the welding torch to block the flux from sliding and splashing, so that the flux stays under the welding torch gun head to ensure the welding quality.

[0004] The wind power tower pole has different shapes such as polygonal prism, circular or triangular, and the inclination angles of the rod body parts on both sides of the longitudinal seam of the rod body with different shapes are different. When using the above-mentioned submerged arc welding device to weld tower poles with different shapes, since the baffle plate is relatively fixed to the welding torch gun head, the baffle plate cannot adapt to the rod body parts with different inclination angles, so that the baffle plate cannot adapt to tower poles with different shapes, thus unable to ensure the staying effect of the flux, and further unable to ensure the welding quality. In addition, affected by environmental conditions, the surface of the tower pole may rust. If the rust on the weld seam is not removed before welding, it will affect the welding quality of the weld seam. Summary of the Invention

[0005] The present invention provides a longitudinal seam welding device for a rod body, aiming to solve the problems that when using the submerged arc welding device in the related technology to weld a tower pole, the baffle plate cannot adapt to tower poles with different shapes, thus unable to ensure the staying effect of the flux, and further unable to ensure the welding quality. In addition, the rust on the longitudinal seam of the tower pole will affect the welding quality of the longitudinal seam.

[0006] A longitudinal seam welding device for a rod body of the present invention includes a welding frame, a moving frame, and a welding assembly. The welding frame is provided with rollers for supporting the rod body. The moving frame is slidably arranged on the welding frame. The welding assembly includes a wire feeding head and a flux funnel arranged on the moving frame. It further includes a material blocking assembly, an adjusting assembly, and a grinding assembly;

[0007] The material blocking assembly includes a fixed plate and two baffles. The fixed plate is connected to the flux funnel. The two baffles are respectively longitudinally slidably arranged on both sides of the flux funnel and are used to block the flux provided by the flux funnel;

[0008] The adjusting assembly includes two adjusting rods and a linkage structure I. The two adjusting rods are respectively arranged on both sides of the flux funnel. One end of the adjusting rod is hinged to the fixed plate, and the other end contacts the outer wall of the rod body on the corresponding side of the weld seam. The linkage structure I is arranged between the adjusting rod on the corresponding side and the baffle and can drive the baffle to move up and down relative to the fixed plate when the angle of the adjusting rod changes;

[0009] The grinding assembly includes a grinding structure and a cleaning structure. The grinding structure is arranged on the front side of the flux funnel and is used to grind the weld seam area. The cleaning structure is arranged between the grinding structure and the flux funnel and is used to clean the impurities ground off.

[0010] It can adjust the position of the baffle according to the shape of the rod body, so that the baffle can adapt to rod bodies of different shapes, ensure the staying effect of the flux in the welding area, and at the same time can clean the impurities in the welding area to ensure the welding effect.

[0011] Preferably, an installation rod is arranged on the side of the fixed plate away from the flux funnel. The upper ends of the two adjusting rods are both hinged to the installation rod, and an elastic member for driving the adjusting rod to reset is arranged between each adjusting rod and the installation rod.

[0012] Preferably, the linkage structure I includes a connecting rod I arranged between the adjusting rod and the baffle. A guide groove I is longitudinally arranged on the fixed plate, and a guide groove II is arranged along the length direction of the adjusting rod. One end of the connecting rod I slidably penetrates through the guide groove I and is fixedly connected to the baffle, and the other end extends into the guide groove II and is slidably matched with the adjusting rod.

[0013] Preferably, a contact part is arranged at the end of the adjusting rod away from the installation rod. The contact part is cylindrical, and the side wall of the cylinder can contact the side wall of the rod body. A plurality of rollers are installed on the side wall of the contact part, which can reduce the friction between the adjusting rod and the outer wall of the rod body and ensure the smooth adjustment of the baffle.

[0014] Preferably, the grinding structure includes two grinding rods and a linkage structure II. A driving rod is installed on the side of the fixing plate away from the flux funnel. The driving rod is located below the mounting rod. The two grinding rods are respectively arranged on both sides of the weld. The upper end of each grinding rod is rotationally matched with the driving rod, and the other end faces the outer wall of the rod body on the corresponding side of the weld. A wire brush is installed on the side of the grinding rod facing the rod body. The linkage structure II is arranged between the adjusting rod on the corresponding side and the grinding rod, and can drive the grinding rod on the corresponding side to swing in the same direction when the angle of the adjusting rod changes. Therefore, during the process of adjusting the baffle by swinging the adjusting rod, the grinding rod can swing, so that the grinding rod can better adapt to the surface of the rod body and ensure the grinding effect.

[0015] Preferably, the linkage structure II includes a second connecting rod arranged between the adjusting rod and the grinding rod. Hinge rods are installed in the middle of the adjusting rod and the middle of the grinding rod. One end of the second connecting rod is hinged to the hinge rod on the adjusting rod, and the other end is hinged to the hinge rod on the grinding rod.

[0016] Preferably, the fixing plate is provided with a spiral hole structure. The spiral hole structure and the driving rod are correspondingly provided with two positive and negative threads that convert the rotational motion of the driving rod into forward and backward reciprocating motions. The two ends of the two threads are transitionally connected so that the driving rod can reciprocate. A driving member for driving the driving rod to rotate is installed on the fixing plate. The end of the second connecting rod is slidably matched with the hinge rod on the grinding rod. The reciprocating movement of the grinding rod can be achieved through the thread fit between the driving rod and the fixing plate, so that the wire brush repeatedly grinds the welding area and improves the grinding effect.

[0017] Preferably, the cleaning structure includes a cleaning brush arranged at the lower end of the fixing plate. The cleaning brush is made of a flexible material. The lower end of the cleaning brush can contact the welding area on the rod body to ensure that the cleaning brush can extend into the weld and clean the impurities in the weld.

[0018] Preferably, a flux cylinder for containing flux is arranged on the moving frame. A telescopic pipe is connected between the outlet end of the flux cylinder and the flux funnel. The length of the telescopic pipe can be adapted to the distance between the flux cylinder and the flux funnel.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The present invention is provided with an adjusting assembly. When welding rods of different shapes, the swinging amplitude required by the adjusting rod is different. Therefore, through the cooperation of the adjusting rod and the linkage structure I, the baffles on both sides of the flux funnel can be adjusted to adapt to rods of different shapes by moving the baffles, ensuring the blocking effect of the baffles on the flux, and further ensuring the welding effect.

[0021] 2. The present invention is provided with a grinding assembly, which can grind away rust on the welding area through the grinding structure during the process of gradual welding of the longitudinal seam by the welding assembly, and clean the impurities ground off through the cleaning structure to improve the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the assembly structure of the welding assembly, the material blocking assembly and the adjusting assembly of the present invention.

[0024] Figure 3 It is a schematic diagram of the assembly structure of the material blocking component, the adjusting component and the grinding component of the present invention.

[0025] Figure 4 It is a schematic diagram of the present invention when welding a polygonal rod body.

[0026] Figure 5 It is a schematic diagram of the present invention when welding a cylindrical rod body.

[0027] Reference numerals:

[0028] 1. Rod body; 11. Welding frame; 12. Moving frame; 13. Roller; 14. Wire feeder head; 15. Flux funnel; 16. Flux cylinder; 17. Telescopic tube; 21. Fixed plate; 211. Guide groove 1; 22. Baffle; 23. Adjusting rod; 231. Contact part; 24. Mounting rod; 25. Connecting rod 1; 31. Grinding rod; 311. Wire brush; 32. Driving rod; 33. Connecting rod 2; 34. Articulated rod; 35. Cleaning brush. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] like Figures 1 to 5 As shown, a rod longitudinal seam welding device of the present invention comprises a welding frame 11, a moving frame 12, a welding assembly, a material blocking assembly, an adjusting assembly and a grinding assembly.

[0031] The welding rack 11 is provided with rollers 13 for supporting the rod body 1. A slide rail is arranged on the welding rack 11 along its length direction. The moving rack 12 is slidably arranged on the welding rack 11 through the slide rail. The welding assembly includes a wire feeding head 14, a flux funnel 15 and a flux cylinder 16 arranged on the moving rack 12. A driving source for driving the wire feeding head 14 and the flux funnel 15 to move longitudinally is arranged on the moving rack 12. A telescopic tube 17 is connected between the outlet end of the flux cylinder 16 and the flux funnel 15, and the length of the telescopic tube 17 can be adapted according to the distance between the flux cylinder 16 and the flux funnel 15.

[0032] During use, as Figures 1 to 4 shown, place the bent rod body 1 on the welding rack 11 and make the longitudinal seam on the rod body 1 face upwards. At this time, the rod body 1 can be supported by the rollers 13. Then, drive the wire feeding head 14 and the flux funnel 15 to gradually approach the longitudinal seam on the rod body 1 downward through the driving source. At the same time, the telescopic tube 17 adapts its length with the movement of the flux funnel 15. When the wire feeding head 14 and the flux funnel 15 move to the set position, the flux in the flux cylinder 16 is sent to the welding area through the flux funnel 15, and at the same time, the welding wire is sent to the welding area through the wire feeding head 14. The longitudinal seam on the rod body 1 is welded by submerged arc welding, and the wire feeding head 14 and the flux funnel 15 are driven to move by the moving rack 12 to gradually weld the longitudinal seam on the rod body 1.

[0033] The baffle component includes a fixed plate 21 and two baffles 22. The fixed plate 21 is connected to the flux funnel 15. The two baffles 22 are respectively arranged on both sides of the flux funnel 15, and each baffle 22 is longitudinally slidably matched with the side of the fixed plate 21 facing the flux funnel 15. The two baffles 22 can block the flux provided by the flux funnel 15 during welding, so that the flux stays below the wire feeding head 14. The adjusting component includes two adjusting rods 23 and a linkage structure I. The two adjusting rods 23 are respectively arranged on both sides of the flux funnel 15. One end of the adjusting rod 23 is hinged to the fixed plate 21, and the other end contacts the outer wall of the rod body 1 on the corresponding side of the weld seam. The linkage structure I is arranged between the adjusting rod 23 on the corresponding side and the baffle 22, and can drive the baffle 22 to move up and down relative to the fixed plate 21 when the angle of the adjusting rod 23 changes.

[0034] Specifically, as Figures 1 to 5As shown in the figure, when the flux is sent to the welding area through the flux hopper 15, the flux will be blocked between the two baffles 22, preventing the flux from sliding down along the outer wall of the rod body 1. When the moving frame 12 drives the flux hopper 15 to move along the length direction of the rod body 1, it will drive the fixing plate 21 connected to the flux hopper 15 to move, and drive the baffle 22 that is longitudinally slidably matched with the fixing plate 21 to move synchronously, ensuring the staying effect of the flux during the welding process, and thus ensuring the welding effect. When the driving source drives the flux hopper 15 to move downward, it will drive the fixing plate 21 and the adjusting rod 23 to move downward synchronously until the lower end of the adjusting rod 23 contacts the outer wall of the rod body 1 on both sides of the weld. At this time, as the flux hopper 15 continues to move downward, it will drive the fixing plate 21 to continue moving downward, causing the two adjusting rods 23 to swing in opposite directions around their own hinge axes, changing the inclination angle of the adjusting rods 23, and increasing the angle between the two adjusting rods 23. During this process, under the action of the linkage structure I, the baffle 22 can be driven to move upward. That is, the flatter the rod body 1 on both sides of the weld, the larger the angle between the two adjusting rods 23, and the greater the upward movement amplitude of the baffle 22. Therefore, when the distance between the flux hopper 15 and the weld is certain, the position of the baffle 22 can be adjusted according to the inclination angle of the rod body 1 on both sides of the weld, so that the baffle 22 can adapt to rod bodies 1 of different shapes, ensuring the welding effect of the longitudinal weld.

[0035] In some embodiments, an installation rod 24 is provided on the side of the fixing plate 21 away from the flux hopper 15. The upper ends of the two adjusting rods 23 are both hinged to the installation rod 24, and an elastic member for driving the adjusting rod 23 to reset is provided between each adjusting rod 23 and the installation rod 24. Among them, the elastic member can be set as a torsion spring, and the upper end of the adjusting rod 23 is rotationally matched with the installation rod 24 through the torsion spring.

[0036] Specifically, as Figures 1 to 3 shown, in the initial state, the angle between the two adjusting rods 23 is relatively small. At this time, the baffle 22 is located at a lower position. As the flux hopper 15 gradually moves downward, it will drive the baffle 22 and the adjusting rod 23 to move downward synchronously, and the lower end of the adjusting rod 23 will first contact the outer wall of the rod body 1 on both sides of the weld. At this time, as the flux hopper 15 continues to move downward, the two adjusting rods 23 will swing in opposite directions around the installation rod 24 synchronously, gradually increasing the angle between the two adjusting rods 23, and causing the elastic member to store energy. During this process, the baffle 22 moves upward under the action of the linkage structure I until the flux hopper 15 moves to the set position, causing the adjusting rod 23 to stop rotating and the baffle 22 to stop moving. At this time, the position of the baffle 22 just adapts to the rod body 1 of this shape, and can block the flux provided by the flux hopper 15, ensuring the welding quality.

[0037] In some embodiments, the linkage structure I includes a first connecting rod 25 disposed between the adjusting rod 23 and the baffle 22. A first guiding groove 211 is longitudinally formed on the fixing plate 21. A second guiding groove is formed along the length direction of the adjusting rod 23. One end of the first connecting rod 25 slidably penetrates through the first guiding groove 211 and is fixedly connected to the baffle 22, and the other end extends into the second guiding groove and is slidably engaged with the adjusting rod 23.

[0038] Specifically, as Figures 1 to 3 shown, when welding rods 1 with different shapes, the inclination angles of the parts of the rod 1 on both sides of the weld seam will be different. When the flux funnel 15 is driven by the driving source to gradually approach the rod 1, the adjusting rod 23 will swing according to the shape of the rod 1 to adapt to rods 1 with different shapes. During the process of the adjusting rod 23 swinging around the mounting rod 24, the first connecting rod 25 will move up and down along the first guiding groove 211, and at the same time, the end of the first connecting rod 25 will slide along the second guiding groove. As the first connecting rod 25 moves, it will drive the baffle 22 to move, that is, the position of the baffle 22 can be adjusted according to the inclination degree of the adjusting rod 23 to adapt to rods 1 with different shapes.

[0039] In some embodiments, a contact portion 231 is provided at one end of the adjusting rod 23 away from the mounting rod 24. The contact portion 231 is cylindrical, and the side wall of the cylinder can be in contact with the side wall of the rod 1. A plurality of rollers are installed on the side wall of the contact portion 231, which can reduce the friction between the contact portion 231 and the outer wall of the rod 1 during the process of the adjusting rod 23 swinging around the mounting rod 24 and the adjusting rod 23 moving along the length direction of the rod 1, so as to avoid affecting the adjustment of the baffle 22.

[0040] The grinding assembly includes a grinding structure and a cleaning structure. The grinding structure is disposed on the front side of the flux funnel 15 and is used for grinding the weld area. The cleaning structure is disposed between the grinding structure and the flux funnel 15 and is used for cleaning the impurities ground off.

[0041] Specifically, as Figures 1 to 5 shown, through the cooperation of the moving frame 12 and the welding assembly, the longitudinal seam on the rod 1 can be gradually welded. During this process, the area to be welded can be ground by the grinding mechanism, and the impurities ground off can be cleaned by the cleaning mechanism to provide a clean surface for welding, thereby ensuring the welding quality.

[0042] In some embodiments, the grinding structure includes two grinding rods 31 and a second linkage structure. A driving rod 32 is installed on the side of the fixing plate 21 away from the flux funnel 15. The driving rod 32 is located below the mounting rod 24. The two grinding rods 31 are respectively arranged on both sides of the weld seam. The upper end of each grinding rod 31 is rotatably matched with the driving rod 32, and the other end faces the outer wall of the rod body 1 on the corresponding side of the longitudinal seam. A wire brush 311 is installed on the side of the grinding rod 31 facing the rod body 1. The second linkage structure is arranged between the adjusting rod 23 on the corresponding side and the grinding rod 31, and can drive the grinding rod 31 on the corresponding side to swing in the same direction when the angle of the adjusting rod 23 changes.

[0043] Specifically, as Figures 1 to 4 shown, when the flux funnel 15 is driven downward by a driving source, it will drive the fixing plate 21, the mounting rod 24 and the driving rod 32 to move, and drive the adjusting rod 23 and the grinding rod 31 to move. During this process, the adjusting rod 23 will swing around the mounting rod 24 to adapt to the shape of the rod body 1. At the same time, the grinding rod 31 will swing in the same direction as the corresponding adjusting rod 23 under the action of the second linkage structure. That is, the flatter the part of the rod body 1 on both sides of the weld seam, the larger the swing angle of the adjusting rod 23, so that the included angle between the two adjusting rods 23 is larger. At the same time, the larger the angle of the grinding rod 31 swinging around the driving rod 32, so that the included angle between the two grinding rods 31 is larger. As a result, the wire brush 311 installed on the grinding rod 31 can better fit the outer wall of the rod body 1. When the subsequent flux funnel 15 moves along the length direction of the rod body 1, the wire brush 311 can grind the rust on the longitudinal seam of the rod body 1 and the area around the longitudinal seam, and the impurities ground off are cleaned by the cleaning structure at the rear to avoid the influence of rust on the welding quality.

[0044] In some embodiments, the second linkage structure includes a second connecting rod 33 arranged between the adjusting rod 23 and the grinding rod 31. Hinge rods 34 are installed in the middle of the adjusting rod 23 and the middle of the grinding rod 31. One end of the second connecting rod 33 is hinged to the hinge rod 34 on the adjusting rod 23, and the other end is hinged to the hinge rod 34 on the grinding rod 31.

[0045] Specifically, as Figures 1 to 3 shown, during the process of the adjusting rod 23 swinging around the mounting rod 24, the position of the middle of the adjusting rod 23 will change, and drive the second connecting rod 33 hinged to the adjusting rod 23 to move, and at the same time pull the grinding rod 31 to move, so that the grinding rod 31 swings around the driving rod 32, changing the inclination angle of the wire brush 311, so that the wire brush 311 can better fit the surface of the rod body 1 on both sides of the longitudinal seam, and thus better grind the welding area.

[0046] In some embodiments, the fixing plate 21 is provided with a spiral hole structure. The spiral hole structure and the driving rod 32 are correspondingly provided with two positive and negative threads that convert the rotational motion of the driving rod 32 into a reciprocating motion forward and backward. The two ends of the two threads are transitionally connected so that the driving rod 32 can reciprocate. A driving member for driving the driving rod 32 to rotate is installed on the fixing plate 21. The second connecting rod 33 is slidably matched with the hinge rod 34 on the polishing rod 31.

[0047] Specifically, as Figures 1 to 3 shown, during the process of driving the welding assembly by the moving frame 12 to gradually weld the longitudinal seam, when the driving member is started to drive the driving rod 32 to rotate, through the thread cooperation between the driving rod 32 and the fixing plate 21, the driving rod 32 can reciprocate along its own axis, and drive the two polishing rods 31 rotatably matched with the driving rod 32 to reciprocate. At the same time, the wire brush 311 installed on the polishing rod 31 is driven to reciprocate to repeatedly polish the area to be welded on the front side of the flux funnel 15, improving the polishing effect.

[0048] As Figures 1 to 3 shown, the cleaning structure includes a cleaning brush 35 provided at the lower end of the fixing plate 21. The cleaning brush 35 is formed by a flexible material. The lower end of the cleaning brush 35 can contact the welding area on the rod body 1. Specifically, when the moving frame 12 drives the flux funnel 15 and the fixing plate 21 to move, the cleaning brush 35 provided at the lower end of the fixing plate 21 can be driven to move synchronously to clean the impurities polished by the front-side polishing structure. And the lower end of the cleaning brush 35 can extend into the weld to clean the impurities in the weld, avoiding the influence of impurities on the welding effect.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A rod body longitudinal seam welding device, comprising a welding frame (11), a movable frame (12) and a welding assembly, wherein the welding frame (11) is provided with a roller (13) for supporting the rod body (1), the movable frame (12) is slidably arranged on the welding frame (11), and the welding assembly comprises a wire feeder head (14) and a flux funnel (15) arranged on the movable frame (12), characterized in that: It also includes a material blocking component, an adjustment component and a grinding component; The material blocking assembly comprises a fixed plate (21) and two baffles (22), the fixed plate (21) being connected to the flux funnel (15), and the two baffles (22) being respectively longitudinally slidably disposed on both sides of the flux funnel (15) and used for blocking the flux provided by the flux funnel (15); The adjustment assembly comprises two adjustment rods (23) and a linkage structure 1, wherein the two adjustment rods (23) are respectively arranged on both sides of the flux funnel (15), one end of the adjustment rod (23) is hinged to the fixed plate (21), and the other end is in contact with the outer wall of the rod body (1) on the side corresponding to the weld, and the linkage structure 1 is arranged between the adjustment rod (23) and the baffle plate (22) on the corresponding side, and can drive the baffle plate (22) to move up and down relative to the fixed plate (21) when the angle of the adjustment rod (23) changes; The grinding assembly comprises a grinding structure and a cleaning structure, wherein the grinding structure is arranged at the front side of the flux funnel (15) and is used to grind the weld area, and the cleaning structure is arranged between the grinding structure and the flux funnel (15) and is used to clean impurities produced by grinding; A mounting rod (24) is provided on one side of the fixing plate (21) away from the flux funnel (15); the upper ends of the two adjusting rods (23) are hinged to the mounting rod (24); and an elastic member for driving the adjusting rod (23) to reset is provided between each adjusting rod (23) and the mounting rod (24); The linkage structure 1 comprises a connecting rod 1 (25) arranged between the adjusting rod (23) and the baffle plate (22); a guide groove 1 (211) is provided on the fixing plate (21) along the longitudinal direction; a guide groove 2 is provided on the adjusting rod (23) along the length direction thereof; one end of the connecting rod 1 (25) slides through the guide groove 1 (211) and is fixedly connected to the baffle plate (22); the other end extends into the guide groove 2 and slides with the adjusting rod (23); The grinding structure comprises two grinding rods (31) and a linkage structure 2. A driving rod (32) is installed on the side of the fixed plate (21) away from the flux funnel (15). The driving rod (32) is located below the mounting rod (24). The two grinding rods (31) are respectively arranged on both sides of the weld. The upper end of each grinding rod (31) is rotatably matched with the driving rod (32), and the other end faces the outer wall of the rod body (1) on the corresponding side of the weld. A wire brush (311) is installed on the side of the grinding rod (31) facing the rod body (1). The linkage structure 2 is arranged between the adjustment rod (23) and the grinding rod (31) on the corresponding side, and can drive the grinding rod (31) on the corresponding side to swing in the same direction when the angle of the adjustment rod (23) changes. The second linkage structure comprises a second connecting rod (33) arranged between the adjusting rod (23) and the polishing rod (31); a hinge rod (34) is installed at the middle of the adjusting rod (23) and the middle of the polishing rod (31); one end of the second connecting rod (33) is hinged to the hinge rod (34) on the adjusting rod (23), and the other end is hinged to the hinge rod (34) on the polishing rod (31).

2. A rod longitudinal seam welding device according to claim 1, characterized in that: A contact portion (231) is provided at one end of the adjustment rod (23) away from the installation rod (24); the contact portion (231) is cylindrical, and the side wall of the cylinder can contact the side wall of the rod body (1); a plurality of rollers are installed on the side wall of the contact portion (231).

3. A rod longitudinal seam welding device according to claim 1, characterized in that: The fixing plate (21) is provided with a spiral hole structure, and the spiral hole structure and the driving rod (32) are provided with two positive and negative threads corresponding to each other for converting the rotary motion of the driving rod (32) into forward and backward reciprocating motion, and the two ends of the two threads are transitionally connected so that the driving rod (32) can reciprocate, and a driving member for driving the driving rod (32) to rotate is installed on the fixing plate (21), and the end of the second connecting rod (33) is slidably matched with the hinge rod (34) on the grinding rod (31).

4. A rod longitudinal seam welding device according to claim 1, characterized in that: The cleaning structure comprises a cleaning brush (35) arranged at the lower end of the fixing plate (21); the cleaning brush (35) is formed from a flexible material; and the lower end of the cleaning brush (35) is capable of contacting a welding area on the rod body (1).

5. The rod longitudinal seam welding device according to claim 1, characterized in that: A flux cylinder (16) for containing flux is provided on the movable frame (12); a telescopic tube (17) is connected between the outlet end of the flux cylinder (16) and the flux funnel (15); and the length of the telescopic tube (17) can be adapted according to the distance between the flux cylinder (16) and the flux funnel (15).

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