Flange joint welding machining device

Abstract

The invention relates to the field of machining and manufacturing of industrial equipment connecting parts, in particular to a flange joint welding machining device which comprises a protective shell and a welding rod, a platform is fixedly connected to the top of the protective shell, and a rotating table is rotationally connected to the inner side of the platform; a telescopic table used for limiting a welding rod is arranged at the top of the rotating table, a welding assembly used for welding a flange base and a flange pipe connector is arranged on the inner side of the protective shell, a stirring assembly used for swing welding is arranged below the welding assembly, and a rotating rod used for rotating a flange connector is arranged on the inner side of the welding assembly. According to the welding device, the flange joint is fixed through the welding assembly, welding of an annular connector of the flange joint is completed through the rotating rod and the welding rod, and meanwhile, swinging of the welding rod is completed through the stirring assembly.

Description

Technical Field

[0001] The present invention relates to the field of processing and manufacturing of connecting components for industrial equipment, and specifically, to a welding processing device for flange joints. Background Art

[0002] Flange joints are indispensable connecting components in industrial pipeline systems and are widely used in multiple fields such as petrochemical, electric power, water treatment, food processing, and pharmaceuticals. Their main function is to connect equipment such as pipelines, valves, and pumps to ensure the smooth and safe transmission of fluid media in the pipeline system. The quality and reliability of flange joints directly affect the operating efficiency and safety of the entire pipeline system;

[0003] Chinese Publication No.: CN118768830A discloses a positioning device for welding processing of flange joints, including a positioning workbench and a flange joint body. A synchronous positioning mechanism is provided on the top of the positioning workbench, and a fume treatment mechanism is provided on the back of the positioning workbench. The synchronous positioning mechanism includes a pneumatic positioning unit and a pneumatic control unit. Through the cooperative design of the support tube and the limit sleeve, the present invention can simultaneously perform temporary positioning processing on five flange joint bodies. Then, through the design of the connecting air pipe, the gas in the inner cavity of the hollow ring seat can be absorbed, promoting the synchronous generation of negative pressure in the inner cavity of the support tube. Thus, the negative pressure drives the plug-in part to move downward to limit the top of the flange joint body, that is, to realize the function of synchronously positioning five flange joint bodies, avoiding the problem of disassembling and assembling a single flange joint body during the welding process, and improving the welding processing efficiency of this structure;

[0004] Although the above patent uses a positioning unit and a pneumatic control unit to realize the function of synchronously positioning five flange joint bodies, considering that during the welding of flange joints, due to the different expansion coefficients of the molten pool and the base material, if no oscillation is performed, the weld will shrink unevenly, resulting in a decrease in weld strength and the appearance of weld cracks. Moreover, if there is too much residual gas in the molten pool during the welding process, pores will be formed, affecting the quality and strength of the weld;

[0005] In view of this, we propose a welding processing device for flange joints. Summary of the Invention

[0006] The purpose of the present invention is to provide a welding processing device for flange joints to solve the problems raised in the above background art.

[0007] To achieve the above-mentioned purpose, the present invention provides a flange joint welding processing device, comprising a protective shell and a welding rod, the top of the protective shell is fixedly connected to a platform, the inner side of the platform is rotatably connected to a rotating table, the top of the rotating table is provided with a telescopic table for limiting the welding rod, the inner side of the protective shell is provided with a welding assembly for welding a flange base and a flange pipe interface, the lower side of the welding assembly is provided with a toggle assembly for swing welding, and the inner side of the welding assembly is provided with a rotating rod for rotating the flange joint, wherein:

[0008] The flange joint is fixed by the welding assembly, the annular interface of the flange joint is welded by the rotating rod and the welding rod, and the swinging assembly is used to swing the welding rod.

[0009] As a preferred embodiment of the present invention, the two sides of the protective shell are slidably connected to a support frame, the top of the support frame is fixedly connected to a telescopic rod, the telescopic rod passes through the support frame, the lower end of the telescopic rod is fixedly connected to a pressing plate, the bottom of the rotating table is fixedly connected to a No. 1 turntable, and the bottom of the No. 1 turntable is fixedly connected to a ring-shaped No. 1 rack, wherein:

[0010] A retractable limiting column is fixedly connected to the top of the rotating platform.

[0011] As a preferred embodiment of the present invention, the welding assembly includes a motor, the motor is fixedly connected to the bottom of the partition inside the protective shell, the output end of the motor is fixedly connected to a No. 1 rotating wheel, the outer wall of the No. 1 rotating wheel is sleeved with a No. 1 transmission belt, a No. 2 rotating wheel is arranged on the inner side of the other end of the No. 1 transmission belt, and a rotating rod is fixedly connected to the center position of the No. 2 rotating wheel.

[0012] As a preferred embodiment of the present invention, a pad is fixedly connected to the outer wall of the upper end of the rotating rod, and the pad is arranged on the top of the rotating table. A slide rail is fixedly connected to the top peripheral position of the pad, and a slider is slidably connected to the top of the slide rail. The slider is triangular, and the triangular inclined surface of the slider faces outward.

[0013] As a preferred embodiment of the present invention, the rotating rod is fixedly connected to the No. 2 rotating disk at a position below the pad, the outer wall around the No. 2 rotating disk is fixedly connected to a plurality of raised parts, the outer wall of the rotating rod is provided with a No. 1 fixed column at a position below the No. 2 rotating disk, the outer wall of the upper end of the rotating rod is slidably connected to a sliding disk, and the lower end of the rotating rod is fixedly connected to a bending rod.

[0014] As a preferred embodiment of the present invention, an extension plate is fixedly connected to one side of the No. 1 fixed column, a fixed plate is fixedly connected to the top of the extension plate, a sliding plate is slidably connected to the inner side of the fixed plate, the sliding plate and the No. 2 turntable are on the same horizontal plane, and a spring is fixedly connected between the sliding plate and the fixed plate, wherein:

[0015] The top of the sliding plate is fixedly connected with a telescopic platform by penetrating the rotating platform, and the welding rod is fixedly connected obliquely to the inner side of the telescopic platform.

[0016] As a preferred embodiment of the present invention, a toggle assembly is arranged below the rotating rod, and the toggle assembly includes a No. 2 fixed column, and a cross groove is provided on the top of the No. 2 fixed column, and the No. 2 fixed column is rotatably connected to a No. 1 gear and a No. 2 gear in the cross groove, and the No. 1 gear and the No. 2 gear are meshed and connected, and the No. 1 gear is fixedly connected to a No. 3 gear on one side of the No. 2 fixed column through a horizontal column, and the No. 2 gear is also fixedly connected to another No. 3 gear on the other side of the No. 2 fixed column through a horizontal column.

[0017] As a preferred embodiment of the present invention, the No. 3 turntable is rotatably connected to both sides of the No. 2 fixed column, the No. 3 turntable is fixedly connected to the top outer wall of the No. 3 turntable, the No. 2 rack is meshingly connected with the No. 3 gear on both sides, and the No. 1 connecting rod is fixedly connected to one side of the No. 3 turntable, the No. 1 connecting rod is rotatably connected to the No. 2 connecting rod at the end away from the No. 3 turntable, and the No. 2 connecting rod is rotatably connected to the bending rod at the end away from the No. 1 connecting rod.

[0018] As a preferred embodiment of the present invention, the No. 3 turntable on both sides is fixedly connected with an extension rod on the side away from the No. 1 connecting rod, and the outer wall of the extension rod on both sides at one end away from the No. 3 turntable is provided with a No. 2 transmission belt, and the inner side of the other end of the No. 2 transmission belt is provided with a No. 3 turntable, and the No. 3 turntable is rotatably connected to the inner wall of the protective shell.

[0019] As a preferred embodiment of the present invention, the third rotating wheel is fixedly connected with a fourth gear on a side away from the inner wall of the protective shell, and the fourth gear is meshingly connected with the first rack.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the flange joint welding processing device, the No. 1 turntable, the rotating rod and the flange joint are driven by the motor to rotate together. When the raised part of the No. 2 turntable rotates, the sliding plate and the telescopic table are driven to slide left and right together, so that the welding rod forms an effect of moving away from and approaching the flange joint, and the interface position of the flange joint is evenly welded.

[0022] 2. In the flange joint welding processing device, the No. 1 connecting rod and the No. 2 connecting rod are driven by the rotation of the rotating rod, so that the No. 3 turntable rotates. At the same time, the extension rods on both sides rotate in opposite directions under the action of the No. 1 gear and the No. 2 gear, and the No. 2 transmission belt drives the No. 4 gear to reciprocate. The No. 4 reciprocating gear drives the rotating table and the telescopic table to reciprocate. This makes the uniform swing of the welding rod make the heat distribution more uniform and the weld shrinkage more uniform, thereby increasing the strength and uniformity of the weld, and can also help the gas to be discharged from the molten pool to avoid the generation of pores. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall three-dimensional schematic diagram of the flange joint welding processing device of the present invention;

[0024] Figure 2 It is a schematic cross-sectional view of the whole flange joint welding processing device of the present invention;

[0025] Figure 3 It is a schematic diagram of the overall longitudinal section of the flange joint welding processing device of the present invention;

[0026] Figure 4 It is a sectional stereoscopic schematic diagram of the protective shell of the flange joint welding processing device of the present invention;

[0027] Figure 5 It is a three-dimensional schematic diagram of the internal welding components of the flange joint welding processing device of the present invention;

[0028] Figure 6 It is a three-dimensional schematic diagram of the welding components of the flange joint welding processing device of the present invention;

[0029] Figure 7 It is a three-dimensional schematic diagram of the position of the welding rod of the flange joint welding processing device of the present invention;

[0030] Figure 8 It is a three-dimensional schematic diagram of the toggle assembly of the flange joint welding processing device of the present invention;

[0031] Figure 9 It is a detailed schematic diagram of the toggle assembly of the flange joint welding processing device of the present invention;

[0032] The meaning of each number in the figure is:

[0033] 1. Protective shell; 11. Platform; 111. Support frame; 12. Telescopic rod; 121. Pressing plate; 13. Rotating table; 131. Turntable No. 1; 1311. Rack No. 1; 132. Limiting column; 2. Welding assembly; 21. Motor; 22. Turntable No. 1; 221. Drive belt No. 1; 23. Turntable No. 2; 24. Turntable; 241. Pad; 2411. Sliding block; 242. Slide rail; 243. Turntable No. 2; 244. Sliding plate; 245. Bending rod; 25. Fixed column No. 1; 251. Extension plate; 26. Fixed plate; 261. Sliding plate; 2611. Telescopic table; 2612. Welding rod; 262. Spring;

[0034] 3. Toggle assembly; 31. Fixed column No. 2; 311. Gear No. 1; 3111. Gear No. 2; 312. Gear No. 3; 32. Turntable No. 3; 321. Rack No. 2; 322. Connecting rod No. 1; 33. Connecting rod No. 2; 34. Extension rod; 35. Transmission belt No. 2; 36. Turntable No. 3; 361. Gear No. 4. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] Embodiment 1

[0038] See also Figures 1 - 9As shown, this embodiment provides a flange joint welding processing device, including a protective shell 1 and a welding rod 2612, the top of the protective shell 1 is fixedly connected to a platform 11, the inner side of the platform 11 is rotatably connected to a rotating table 13, the top of the rotating table 13 is provided with a telescopic table 2611 for limiting the welding rod 2612, the inner side of the protective shell 1 is provided with a welding assembly 2 for welding the flange base and the flange pipe interface, the lower part of the welding assembly 2 is provided with a toggle assembly 3 for swing welding, and the inner side of the welding assembly 2 is provided with a rotating rod 24 for rotating the flange joint, wherein: the flange joint is fixed by the welding assembly 2, the welding of the annular interface of the flange joint is completed by using the rotating rod 24 and the welding rod 2612, and the swinging of the welding rod 2612 is completed by using the toggle assembly 3.

[0039] like Figures 1 - 3 As shown, the protective shell 1 is slidably connected to a support frame 111 on both sides, a telescopic rod 12 is fixedly connected to the top of the support frame 111, the telescopic rod 12 passes through the support frame 111, a pressing plate 121 is fixedly connected to the lower end of the telescopic rod 12, a No. 1 turntable 131 is fixedly connected to the bottom of the rotating table 13, a No. 1 turntable 131 is fixedly connected to the bottom of the No. 1 turntable 131, and a ring-shaped No. 1 rack 1311 is fixedly connected, wherein: a telescopic limiting column 132 is fixedly connected to the top of the rotating table 13.

[0040] like Figures 5 - 6 As shown, the welding assembly 2 includes a motor 21, which is fixedly connected to the bottom of the inner partition of the protective shell 1, and the output end of the motor 21 is fixedly connected to a No. 1 rotating wheel 22, and the outer wall of the No. 1 rotating wheel 22 is sleeved with a No. 1 transmission belt 221, and the inner side of the other end of the No. 1 transmission belt 221 is provided with a No. 2 rotating wheel 23, and the center position of the No. 2 rotating wheel 23 is fixedly connected to a rotating rod 24, and the upper end outer wall of the rotating rod 24 is fixedly connected to a pad 241, and the pad 241 is arranged on the top of the rotating table 13, and the top peripheral position of the pad 241 is fixedly connected to It is connected to a slide rail 242, and a slider 2411 is slidably connected to the top of the slide rail 242. The slider 2411 is triangular, and the triangular slope of the slider 2411 faces outward. The rotating rod 24 is fixedly connected to the second turntable 243 at a position below the pad 241, and a plurality of protrusions are fixedly connected to the outer wall around the second turntable 243. A first fixed column 25 is provided on the outer wall of the rotating rod 24 at a position below the second turntable 243. The outer wall of the upper end of the rotating rod 24 is slidably connected to the sliding disk 244, and the lower end of the rotating rod 24 is fixedly connected to the bending rod 245.

[0041] like Figures 6 - 7As shown, one side of the No. 1 fixed column 25 is fixedly connected with an extension plate 251, the top of the extension plate 251 is fixedly connected with a fixed plate 26, the inner side of the fixed plate 26 is slidably connected with a sliding plate 261, the sliding plate 261 and the No. 2 turntable 243 are on the same horizontal plane, and a spring 262 is fixedly connected between the sliding plate 261 and the fixed plate 26, wherein: the top of the sliding plate 261 is fixedly connected with a telescopic table 2611 by passing through the rotating table 13, the welding rod 2612 is obliquely fixedly connected to the inner side of the telescopic table 2611, and the rotating rod 24 A toggle assembly 3 is arranged at the bottom, and the toggle assembly 3 includes a No. 2 fixed column 31. A cross groove is opened on the top of the No. 2 fixed column 31. The No. 2 fixed column 31 is rotatably connected with a No. 1 gear 311 and a No. 2 gear 3111 in the cross groove. The No. 1 gear 311 and the No. 2 gear 3111 are meshed and connected. The No. 1 gear 311 passes through one side of the No. 2 fixed column 31 through a horizontal column and is fixedly connected to a No. 3 gear 312. The No. 2 gear 3111 also passes through the other side of the No. 2 fixed column 31 through a horizontal column and is fixedly connected to another No. 3 gear 312.

[0042] It can be seen from this that when the flange joint needs to be welded, Figures 2 - 6 As shown, the staff first places the base part of the flange joint to be welded on the pad 241, and then sets the tubular part of the flange joint on the sliding plate 244. At this time, the extension of the telescopic rod 12 drives the pressing plate 121 to press down, so that the tubular part of the flange joint moves down to connect with the base part, so that the tubular part of the flange joint and the base part are fixed on the top of the pad 241. At this time, the switch is turned on, as shown in FIG. Figure 6 As shown, the first rotating wheel 22 rotates under the drive of the motor 21, and the second rotating wheel 23 rotates together with the rotating rod 24 under the drive of the first transmission belt 221, and at the same time, the flange joint fixed on the pad 241 is driven to rotate together;

[0043] At this time, the interface position of the flange joint is welded by the welding rod 2612 on the telescopic table 2611. When the rotating rod 24 rotates, the second rotating disk 243 is driven to rotate together. When the second rotating disk 243 rotates, the convex part and the concave part are staggered and abutted against the sliding plate 261. Under the action of the spring 262, the sliding plate 261 is caused to slide back and forth left and right. At the same time, the sliding plate 261 drives the telescopic table 2611 to slide left and right together, so that the welding rod 2612 forms an effect of moving away from and approaching the flange joint, and the interface position of the flange joint is evenly welded.

[0044] It should be noted that during the process of the distance between the welding rod 2612 and the interface position of the flange joint changing from far to near and then from near to far, under the restriction of the limiting column 132, the inclined connecting column of the telescopic table 2611 will slide on the limiting column 132 at this time. This enables the telescopic table 2611 to also expand and contract vertically under the restriction of the limiting column 132 during the reciprocating movement from left to right.

[0045] Embodiment 2

[0046] Different from Embodiment 1, in order to ensure the strength and uniformity of the weld seam during the welding process, as Figures 8 - 9 shown, the two sides of the second fixed column 31 are rotatably connected with the third turntables 32. The outer wall of the top of the third turntables 32 is fixedly connected with the second rack bars 321. The second rack bars 321 are meshed and connected with the third gear wheels 312 on both sides. One side of the third turntable 32 is fixedly connected with the first connecting rod 322. The first connecting rod 322 is rotatably connected with the second connecting rod 33 at the end far away from the third turntable 32. The second connecting rod 33 is rotatably connected with the bent rod 245 at the end far away from the first connecting rod 322. The two sides of the third turntables 32 are fixedly connected with the extension rods 34 on the side far away from the first connecting rod 322. The outer walls of the ends of the two extension rods 34 far away from the third turntables 32 are sleeved with the second transmission belts 35. The inner side of the other end of the second transmission belts 35 is provided with the third runner 36. The third runner 36 is rotatably connected to the inner wall of the protective shell 1. The third runner 36 is fixedly connected with the fourth gear wheel 361 on the side far away from the inner wall of the protective shell 1. The fourth gear wheel 361 is meshed and connected with the first rack bar 1311.

[0047] It can be seen that in order to ensure the same amplitude of swing during the welding process, as Figures 8 - 9As shown, during the rotation of the rotating rod 24, the bent rod 245 will be driven to rotate together. At the same time, the rotation of the bent rod 245 will drive the first connecting rod 322 to move up and down. When the first connecting rod 322 rotates to the side close to the second connecting rod 33, it will press down the second connecting rod 33. When the first connecting rod 322 rotates to the side away from the second connecting rod 33, it will pull up the second connecting rod 33. During the process of pressing down or pulling up the second connecting rod 33, it will drive the third turntable 32 to rotate. Then, during the rotation of the third turntable 32, it will drive the third gear 312 on this side to rotate a certain angle. The rotation of the third gear 312 will drive the first gear 311 and the second gear 3111 to rotate together. The first gear 311 will drive the third gear 312 on the other side to rotate together. At this time, the third gear 312 on the other side will drive the third turntable 32 on the other side to rotate together. Since the first gear 311 and the second gear 3111 are meshed with each other, when one of the first gear 311 and the second gear 3111 rotates, the two will rotate in opposite directions. Therefore, the third turntables 32 on both sides will also rotate in opposite directions. Similarly, during the process of the third turntables 32 on both sides rotating in opposite directions, the extension rods 34 on both sides will be driven to rotate in opposite directions;

[0048] When one side of the extension rods 34 on both sides rotates upward and the other side rotates downward, it will pull the second transmission belt 35. During the movement of the second transmission belt 35, it will drive the third runner 36 and the fourth gear 361 to rotate a certain angle together. Because during the rotation of the bent rod 245, the first connecting rod 322 and the second connecting rod 33 are in a reciprocating pressing down and pulling up effect, and the extension rods 34 on both sides are also in a reciprocating up and down movement effect. At this time, when the fourth gear 361 rotates a certain angle reciprocally, under the block of the first rack 1311, the rotating table 13 will rotate a certain angle reciprocally, and the rotating table 13 will drive the telescopic table 2611 to rotate together. At this time, there is a certain degree of relative rotation between the flange joint on the cushion plate 241 and the rotation of the rotating rod 24 and the rotation of the welding rod 2612. And the left and right sliding of the second turntable 243 on the welding rod 2612 forms a regular swinging welding effect of the welding rod 2612. This makes the welding rod 2612 swing evenly, which can make the heat distribution more uniform and the weld shrinkage more uniform, thereby increasing the strength and uniformity of the weld, and can also help the gas to be discharged from the molten pool to avoid the generation of pores.

[0049] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A flange joint welding processing device, comprising a protective shell (1) and a welding rod (2612), characterized in that: The top of the protective shell (1) is fixedly connected to a platform (11), the inner side of the platform (11) is rotatably connected to a rotating table (13), the top of the rotating table (13) is provided with a telescopic table (2611) for limiting the welding rod (2612), the inner side of the protective shell (1) is provided with a welding assembly (2) for welding the flange base and the flange pipe interface, the lower side of the welding assembly (2) is provided with a toggle assembly (3) for swing welding, and the inner side of the welding assembly (2) is provided with a rotating rod (24) for rotating the flange joint, wherein: By fixing the flange joint through the welding assembly (2), the welding of the annular interface of the flange joint is completed using the rotating rod (24) and the welding rod (2612), and the swinging assembly (3) is used to complete the swinging of the welding rod (2612).

2. A flange joint welding processing device according to claim 1, characterized in that: The two sides of the protective shell (1) are slidably connected to a support frame (111), the top of the support frame (111) is fixedly connected to a telescopic rod (12), the telescopic rod (12) passes through the support frame (111), the lower end of the telescopic rod (12) is fixedly connected to a pressing plate (121), the bottom of the rotating platform (13) is fixedly connected to a No. 1 turntable (131), and the bottom of the No. 1 turntable (131) is fixedly connected to an annular No. 1 rack (1311), wherein: A retractable limiting column (132) is fixedly connected to the top of the rotating platform (13).

3. A flange joint welding processing device according to claim 2, characterized in that: The welding assembly (2) comprises a motor (21), the motor (21) is fixedly connected to the bottom of the inner partition of the protective shell (1), the output end of the motor (21) is fixedly connected to a first rotating wheel (22), the outer wall of the first rotating wheel (22) is sleeved with a first transmission belt (221), the other end of the first transmission belt (221) is provided with a second rotating wheel (23) on the inner side, and the center position of the second rotating wheel (23) is fixedly connected to a rotating rod (24).

4. A flange joint welding processing device according to claim 3, characterized in that: The outer wall of the upper end of the rotating rod (24) is fixedly connected with a pad (241), and the pad (241) is arranged on the top of the rotating platform (13). The top peripheral position of the pad (241) is fixedly connected with a slide rail (242), and the top of the slide rail (242) is slidably connected with a slider (2411), and the slider (2411) is triangular, and the triangular inclined surface of the slider (2411) faces outward.

5. A flange joint welding processing device according to claim 4, characterized in that: The rotating rod (24) is fixedly connected to a second rotating disk (243) at a position below the pad (241); a plurality of protrusions are fixedly connected to the peripheral outer wall of the second rotating disk (243); a first fixed column (25) is arranged on the outer wall of the rotating rod (24) at a position below the second rotating disk (243); a sliding disk (244) is slidably connected to the outer wall of the upper end of the rotating rod (24); and a bending rod (245) is fixedly connected to the lower end of the rotating rod (24).

6. A flange joint welding processing device according to claim 5, characterized in that: An extension plate (251) is fixedly connected to one side of the first fixed column (25), a fixed plate (26) is fixedly connected to the top of the extension plate (251), a sliding plate (261) is slidably connected to the inner side of the fixed plate (26), the sliding plate (261) and the second rotating disk (243) are on the same horizontal plane, and a spring (262) is fixedly connected between the sliding plate (261) and the fixed plate (26), wherein: The top of the sliding plate (261) is fixedly connected to a telescopic table (2611) by penetrating the rotating table (13), and the welding rod (2612) is fixedly connected to the inner side of the telescopic table (2611) in an oblique direction.

7. A flange joint welding processing device according to claim 6, characterized in that: A toggle assembly (3) is arranged below the rotating rod (24), wherein the toggle assembly (3) includes a No. 2 fixed column (31), a cross groove is provided on the top of the No. 2 fixed column (31), the No. 2 fixed column (31) is rotatably connected with a No. 1 gear (311) and a No. 2 gear (3111) in the cross groove, the No. 1 gear (311) and the No. 2 gear (3111) are meshingly connected, the No. 1 gear (311) is fixedly connected with a No. 3 gear (312) on one side of the No. 2 fixed column (31) through a horizontal column, and the No. 2 gear (3111) is also fixedly connected with another No. 3 gear (312) on the other side of the No. 2 fixed column (31) through a horizontal column.

8. The flange joint welding processing device according to claim 7 is characterized in that: The two sides of the No. 3 rotating disk (32) are rotatably connected, the top outer wall of the No. 3 rotating disk (32) is fixedly connected with a No. 2 rack (321), the No. 2 rack (321) is meshed and connected with the No. 3 gear (312) on both sides, one side of the No. 3 rotating disk (32) is fixedly connected with a No. 1 connecting rod (322), the No. 1 connecting rod (322) is rotatably connected with a No. 2 connecting rod (33) at one end away from the No. 3 rotating disk (32), and the No. 2 connecting rod (33) is rotatably connected to the bending rod (245) at one end away from the No. 1 connecting rod (322).

9. A flange joint welding processing device according to claim 8, characterized in that: The third turntable (32) on both sides is fixedly connected to an extension rod (34) at a side away from the first connecting rod (322); the outer wall of the extension rod (34) on both sides at one end away from the third turntable (32) is provided with a second transmission belt (35); the inner side of the other end of the second transmission belt (35) is provided with a third rotating wheel (36); the third rotating wheel (36) is rotatably connected to the inner wall of the protective shell (1).

10. A flange joint welding processing device according to claim 9, characterized in that: The third rotating wheel (36) is fixedly connected to a fourth gear (361) on a side away from the inner wall of the protective shell (1), and the fourth gear (361) is meshingly connected to the first rack (1311).

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