Automatic flange plate welding device

Abstract

The invention relates to the field of flange plate welding, in particular to an automatic flange plate welding device which comprises a fixing table, a three-jaw chuck used for clamping a flange plate is arranged at the upper end of the fixing table, and a fixing mechanism used for fixing the flange plate and a pipeline and a circumferential welding mechanism used for welding the pipeline to the flange plate are arranged above the fixing table. In the downward moving process of the fixing mechanism, the flange plate which is clamped and fixed can be limited in the circumferential direction, the upper end of a pipeline can be pressed, meanwhile, the pipeline can be clamped through the inner clamping assembly, the effect that one machine has multiple functions is achieved, it is ensured that the flange plate and the pipeline reach the optimal alignment state before welding, and the welding efficiency is improved. And meanwhile, the overall structural stability in the welding process can be further improved, the welding quality is improved, and the overall working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of flange welding, in particular to an automatic flange welding device. Background Art

[0002] Flanges are common fittings in pipeline systems. They are usually round metal plates used to connect pipes, valves, pumps and other equipment, with evenly spaced mounting holes. The flanges and pipes are usually installed by welding to improve the connection strength and sealing between the flanges and pipes. However, the following problems still exist in the process of welding flanges and pipes: (1) Currently, the pipes are directly inserted into the flanges without fixing them before welding. Under this method, the relative stability between the pipes and flanges needs to be improved. The pipes are prone to slight position deviations during welding, which leads to welding defects such as uneven weld quality.

[0003] (2) When welding the connection between the flange and the pipe, the welder needs to be in a tilted state at all times. However, when the welder is held in hand and needs to be moved circumferentially during welding, the welder cannot completely maintain the tilted state. That is, the stability of the welder relative to the flange and the pipe is low, and it is difficult to ensure the uniformity of the weld quality, which affects the welding efficiency and welding quality.

[0004] Therefore, in order to solve the problems existing in the welding process between the flange and the pipeline, the present invention provides an automatic flange welding device. Summary of the invention

[0005] The present invention provides an automatic flange welding device, comprising a fixing table, a three-jaw chuck for clamping the flange is arranged at the upper end of the fixing table, a fixing mechanism for fixing the flange and the pipeline and a circumferential welding mechanism for welding the pipeline to the flange are arranged above the fixing table; the fixing mechanism comprises a circular pressing plate, a sleeve ring is installed at the lower end of the circular pressing plate, an inner clamping assembly for internally clamping the pipeline is arranged inside the sleeve ring, a pressing ring is arranged below the circular pressing plate, a circumferentially evenly arranged limit rods are arranged at the lower end of the pressing ring, an adjusting member for adjusting the position of the limit rod is arranged at the lower end of the pressing ring, a circumferentially evenly arranged support plate is arranged outside the pressing ring, and a side of the support plate away from the pressing ring is connected to the lower end of the circular pressing plate An inclined plate is connected between the surfaces, and a positioning component for centering the pipe is arranged in the middle of the upper end of the three-jaw chuck; the circumferential welding mechanism includes a fixing ring concentrically arranged on the outside of the pressure ring and connected to the circumferentially arranged support plates, a supporting ring located directly above the fixing ring is connected between the upper ends of the circumferentially arranged inclined plates, an automatic welding machine inclined toward the center of the pressure ring is arranged on the inner side of the support ring, a rod member 1 slidably connected to the fixing ring is arranged at the lower end of the automatic welding machine, a guide ring located between the support ring and the fixing ring is mounted on the outside of the sleeve, a rod member 2 slidably connected to the guide ring is arranged at the upper end of the automatic welding machine, and a rotating drive component for driving the automatic welding machine to rotate circumferentially around the sleeve is arranged at the upper end of the support ring.

[0006] In one possible implementation, the positioning assembly includes a rectangular groove opened in the middle of the upper end of the three-jaw chuck, a fixed column is installed in the middle of the rectangular groove, the upper end of the fixed column is truncated, a rectangular plate is arranged inside the rectangular groove to slide up and down with the fixed column, two bottom springs symmetrical about the fixed column are connected between the rectangular plate and the bottom wall of the rectangular groove, two abutment plates symmetrical about the fixed column are arranged above the rectangular plate, an elastic telescopic connecting rod is hinged between the abutment plate and the upper end of the fixed column, a sliding through groove is opened on the fixed section of the elastic telescopic connecting rod, and two vertical rods distributed front and back about the elastic telescopic connecting rod are hinged at the position of the upper end of the rectangular plate corresponding to the elastic telescopic connecting rod, and a pin rod slidably connected to the corresponding sliding through groove is rotatably installed between the two vertical rods opposite to each other.

[0007] In one possible implementation, the inner clamping assembly includes a mounting sleeve installed at the lower end of the circular pressure plate and located inside the ring, an arc-shaped clamping plate evenly arranged in the circumferential direction is provided on the outer side of the mounting sleeve, a push plate sliding through the mounting sleeve is installed on the inner side of the arc-shaped clamping plate, an inclined surface is provided on the side of the push plate away from the arc-shaped clamping plate, two connecting springs distributed up and down corresponding to the push plates are connected between the arc-shaped clamping plate and the outer ring surface of the mounting sleeve, a push rod is slidably installed inside the mounting sleeve, a frustum section is provided at the lower end of the push rod, the push rod is mounted on the lower end of the movable plate, and a control spring mounted on the outside of the push rod is connected between the movable plate and the circular pressure plate.

[0008] In one possible implementation, a moving component for controlling the overall downward movement of the fixing mechanism and the circumferential welding mechanism is provided at the upper end of the fixed platform, the moving component includes two vertical guide rails symmetrically installed on the upper end of the fixed platform with respect to the three-jaw chuck, the moving plate is installed between the left and right vertical guide rails for sliding up and down, an electric slider fixedly connected to the upper end surface of the moving plate is slidably installed on the vertical guide rail, side plates slidably connected to the corresponding vertical guide rails are installed on the left and right sides of the fixed ring, and a telescopic spring mounted on the outside of the corresponding vertical guide rail is connected between the side plate and the moving plate.

[0009] In one possible implementation, the adjustment member includes an adjusting ring rotatably mounted on the inner side of a pressure ring, an arc-shaped groove is provided at the lower end of the pressure ring, an arc-shaped block slidably connected to the arc-shaped groove is installed at the outer side of the adjusting ring, arc springs are connected between groove walls corresponding to the arc-shaped groove on both sides of the arc-shaped block, a strip groove is provided at the lower end of the adjusting ring, the strip grooves are evenly arranged circumferentially and extend along the radial direction of the pressure ring, the upper end of the limit rod is slidably connected to the strip grooves, the lower end of the limit rod is in the shape of an inverted truncated cone, and adjustment springs are connected between the inner and outer sides of the upper end of the limit rod and the groove walls corresponding to the strip grooves.

[0010] In one possible implementation, the rotary drive assembly includes an outer gear ring rotatably mounted on the upper end of a support ring, a movable column is mounted on the upper end of the automatic welding machine and is slidably connected to the outer gear ring and is located on the inner side of the support ring, a rotating gear is rotatably mounted on the upper end of the support ring and is meshed with the outer gear ring, and the upper end of the rotating gear is connected to the output shaft of a drive motor mounted on the upper end of a circular pressure plate.

[0011] In one possible implementation, a multi-stage telescopic rod whose telescopic end is fixedly connected to a fixed platform is installed at the lower end of the support plate, a connecting column installed at the lower end of the support plate is arranged on the side of the multi-stage telescopic rod away from the fixed ring, and sockets evenly arranged up and down are provided on the side of the connecting column away from the multi-stage telescopic rod, connecting through holes are provided at positions corresponding to the connecting columns on the fixed platform, sliding holes are provided on the inner walls of the connecting through holes, and plug rods matching the corresponding plug holes are slidably installed inside the sliding holes, and side springs are connected between the plug rods and the inner walls of the sliding holes.

[0012] In one possible implementation, the left and right sides of the rectangular plate are provided with adjustment grooves located between the corresponding two vertical poles, the bottom wall of the adjustment groove is provided with square holes evenly arranged on the left and right sides, an adjustment rod is arranged inside the adjustment groove, and a square block that is plugged into the corresponding square hole is installed at the lower end of the adjustment rod.

[0013] In a possible implementation, an auxiliary plate is provided on one side of the abutment plate away from the corresponding elastic telescopic connecting rod, and auxiliary springs evenly arranged up and down are connected between the auxiliary plate and the abutment plate.

[0014] In one possible implementation, the rod member 1 is a threaded telescopic rod installed at the lower end of the automatic welding machine, the telescopic end of the rod member 1 is slidably connected to the upper end surface of the fixed ring, the rod member 2 is a telescopic column with a pin hinged at the telescopic end and the pin is slidably connected to the guide ring, the fixed end of the rod member 2 is installed with a bolt and the bolt is rotatably connected to the upper end of the automatic welding machine, and a nut is also threadedly installed on the bolt.

[0015] Beneficial effects of the present invention: 1. The positioning assembly adopted in the present invention can use the weight of the pipeline itself to accurately position it in the center on the flange, ensure the precise alignment between the pipeline and the flange, ensure that the welds between the flange and the pipeline are evenly distributed, and at the same time can significantly shorten the preparation time before welding. The operation is convenient and simple, thereby improving the overall welding efficiency.

[0016] 2. During the downward movement, the fixing mechanism of the present invention can not only limit the circumferential position of the clamped flange, but also press the upper end of the pipeline. At the same time, the pipeline can be clamped by the internal clamping assembly to achieve a multi-functional effect of one machine, ensuring that the flange and the pipeline are in the best alignment state before welding. At the same time, the overall structural stability during the welding process can be further increased, thereby improving the welding quality and improving the overall work efficiency.

[0017] 3. The circumferential welding mechanism adopted in the present invention can provide stable support for the automatic welding machine which is in an inclined state and performs circumferential rotation welding, ensuring that the automatic welding machine maintains a constant position and angle during welding, and evenly completes the circumferential welding of the weld, thereby improving the welding accuracy and quality. At the same time, a stable and reliable triangular structure is formed between the circumferential welding mechanism and the fixing mechanism, which can increase the relative stability between the two and ensure the stable progress of the welding operation.

[0018] In addition to the technical problems solved by the embodiments of the present invention described above, the technical features that constitute the technical scheme, and the beneficial effects brought about by the technical features of these technical schemes, other technical problems that can be solved by an automatic flange welding device provided by an embodiment of the present application, other technical features included in the technical scheme, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention.

[0021] Figure 2 It is a schematic cross-sectional structural diagram of the fixing table and the three-jaw chuck of the present invention.

[0022] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of area A in the middle.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the positioning component of the present invention.

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the fixing mechanism and the circumferential welding mechanism of the present invention.

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the adjusting member and the limiting rod of the present invention.

[0026] Figure 7 It is a three-dimensional structural schematic diagram of the circumferential welding mechanism and the rotary drive assembly of the present invention.

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the movable plate, the circular pressing plate and the inner clamping assembly of the present invention.

[0028] Fig. 9 It is a schematic diagram of the three-dimensional structure of the inner clamping assembly of the present invention.

[0029] In the figure: 1. fixed platform; 11. vertical guide rail; 111. electric slider; 112. telescopic spring; 113. multi-stage telescopic rod; 114. connecting column; 115. jack; 116. connecting through hole; 117. plug rod; 118. side spring; 2. three-jaw chuck; 211. rectangular groove; 212. fixed column; 213. rectangular plate; 214. bottom spring; 215. abutment plate; 216. elastic telescopic connecting rod; 217. vertical rod; 218. sliding through groove; 219. square hole; 221. adjusting rod; 222. square block; 223. auxiliary plate; 224. auxiliary spring; 3. fixing mechanism; 311. circular pressure plate; 312. collar; 313. Mounting sleeve; 314. Arc-shaped clamping plate; 315. Push plate; 316. Connecting spring; 317. Push rod; 318. Moving plate; 319. Control spring; 321. Pressing ring; 322. Limiting rod; 323. Adjusting ring; 324. Arc-shaped groove; 325. Arc-shaped spring; 326. Strip groove; 327. Adjusting spring; 328. Support plate; 329. Inclined plate; 4. Circumferential welding mechanism; 411. Fixed ring; 412. Support ring; 413. Automatic welding machine; 414. Rod one; 415. Guide ring; 416. Rod two; 417. External gear ring; 418. Moving column; 419. Rotating gear; 420. Driving motor. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0031] See also Figure 1 A flange automatic welding device comprises a fixing table 1, wherein a three-jaw chuck 2 for clamping the flange is arranged at the upper end of the fixing table 1, a fixing mechanism 3 for fixing the flange and the pipeline and a circumferential welding mechanism 4 for welding the pipeline to the flange are arranged above the fixing table 1.

[0032] See also Figure 1-Figure 4 A positioning component for centering the pipeline is provided in the middle of the upper end of the three-jaw chuck 2, and the positioning component includes a rectangular groove 211 opened in the middle of the upper end of the three-jaw chuck 2, a fixing column 212 is installed in the middle of the rectangular groove 211, and the upper end of the fixing column 212 is truncated, and a rectangular plate 213 is provided inside the rectangular groove 211 to slide up and down with the fixing column 212. Two bottom springs 214 symmetrical about the fixing column 212 are connected between the rectangular plate 213 and the bottom wall of the rectangular groove 211, and two abutment plates 215 symmetrical about the fixing column 212 are provided above the rectangular plate 213. An elastic telescopic connecting rod 216 is hinged between the abutment plate 215 and the upper end of the fixing column 212, and a sliding through groove 218 is provided on the fixed section of the elastic telescopic connecting rod 216. The position of the elastic telescopic connecting rod 216 corresponding to the upper end of 213 is hinged with two vertical rods 217 distributed front and rear about the elastic telescopic connecting rod 216, and a pin rod slidably connected to the corresponding sliding groove 218 is rotatably installed between the two vertical rods 217 opposite to each other. Adjustment grooves located between the corresponding two vertical rods 217 are provided on the left and right sides of the rectangular plate 213, and square holes 219 evenly arranged on the left and right sides are provided on the bottom wall of the adjustment groove. An adjustment rod 221 is arranged inside the adjustment groove, and a square block 222 plug-matched with the corresponding square hole 219 is installed on the lower end of the adjustment rod 221. An auxiliary plate 223 is provided on the side of the abutment plate 215 away from the corresponding elastic telescopic connecting rod 216, and auxiliary springs 224 evenly arranged up and down are connected between the auxiliary plate 223 and the abutment plate 215.

[0033] During the specific work: first, the flange needs to be placed in the middle of the upper end of the three-jaw chuck 2, and try to ensure that the mounting holes on the flange are aligned with the corresponding jaws on the three-jaw chuck 2 and are on the same radial line of the three-jaw chuck 2. Then the three-jaw chuck 2 can clamp the flange circumferentially through the jaws, and then the pipe to be welded can be inserted into the center hole of the flange. It should be noted that the length of the rectangular plate 213 is smaller than the inner diameter of the pipe, and the adjusting rod 221 on the rectangular plate 213 is located in the center hole of the flange and below the pipe. In the process of inserting and placing the pipe, the pipe can use its own weight to press the two adjusting rods 221 to make the rectangular plate 213 compresses the bottom spring 214 and passes through the fixed column 212 and moves down to the inside of the rectangular groove 211. The vertical rod 217 moves down with the rectangular plate 213 and drives the corresponding elastic telescopic connecting rod 216 to rotate outward through the cooperation between the pin rod and the sliding groove 218. The two elastic telescopic connecting rods 216 respectively drive the corresponding abutment plate 215, auxiliary spring 224 and auxiliary plate 223 to rotate synchronously until the auxiliary plate 223 is close to the inner wall of the pipeline to complete the centering positioning and internal support of the pipeline, avoid small deviations of the pipeline and affect the accuracy of subsequent welding, and further improve the stability of the pipeline in the center hole of the flange.

[0034] When the diameter of the flange to be welded changes, the diameter of its center hole changes synchronously, and at the same time, pipes of different diameters need to be welded to the flange. The three-jaw chuck 2 can flexibly fix flanges of different diameters. Before inserting pipes of different diameters, the positions of the two adjusting rods 221 on the rectangular plate 213 can be changed according to the outer diameter and inner diameter of the flange to ensure that the pipe can always press the adjusting rod 221 and move the rectangular plate 213 downward. In this process, the two adjusting rods 221 can be moved upward at the same time to disengage the square block 222 from the corresponding square hole 219, and then the adjusting rod 221 can be moved along the adjusting groove to insert the square block 222 into the corresponding appropriate square hole 219 to fix the adjusting rod 221 in the adjusting groove. Under the action of the elastic telescopic connecting rod 216, the abutment plate 215 and the auxiliary spring 224, the auxiliary plate 223 can always fit the inner wall of pipes of different diameters, and pipes of different diameters can be stably and effectively positioned.

[0035] See also Figure 1 , Figure 5 , Figure 8 and Fig. 9The fixing mechanism 3 includes a circular pressing plate 311, a collar 312 is installed at the lower end of the circular pressing plate 311, an inner clamping assembly for clamping the pipe is arranged inside the collar 312, the inner clamping assembly includes a mounting sleeve 313 installed at the lower end of the circular pressing plate 311 and located inside the collar 312, an arc-shaped clamping plate 314 arranged evenly in the circumferential direction is arranged outside the mounting sleeve 313, a pushing plate 315 sliding through the mounting sleeve 313 is installed inside the arc-shaped clamping plate 314, and the pushing plate An inclined surface is provided on the side 315 away from the arc-shaped clamping plate 314, and two connecting springs 316 distributed up and down corresponding to the push plate 315 are connected between the arc-shaped clamping plate 314 and the outer ring surface of the mounting sleeve 313. A push rod 317 is installed inside the mounting sleeve 313 for sliding up and down. A frustum section is provided at the lower end of the push rod 317. The push rod 317 is installed at the lower end of the moving plate 318. A control spring 319 mounted on the outside of the push rod 317 is connected between the moving plate 318 and the circular pressure plate 311.

[0036] See also Figure 1 , Figure 5 , Figure 6 and Figure 7 A pressing ring 321 is provided below the circular pressing plate 311, and a limiting rod 322 arranged evenly in the circumferential direction is provided at the lower end of the pressing ring 321. An adjusting member for adjusting the position of the limiting rod 322 is provided at the lower end of the pressing ring 321. The adjusting member includes an adjusting ring 323 rotatably mounted on the inner side of the pressing ring 321, and an arc-shaped groove 324 is provided at the lower end of the pressing ring 321. An arc block slidably connected to the arc groove 324 is installed on the outer side of the adjusting ring 323. An arc spring 325 is connected between the groove walls corresponding to the arc groove 324 on both sides of the arc block. The lower end of the node ring 323 is provided with a strip groove 326 which is evenly arranged in the circumference and extends in the radial direction of the pressure ring 321. The upper end of the limiting rod 322 is slidably connected to the strip groove 326. The lower end of the limiting rod 322 is in the shape of an inverted cone. Adjustment springs 327 are connected between the inner and outer sides of the upper end of the limiting rod 322 and the groove walls corresponding to the strip groove 326. A support plate 328 which is evenly arranged in the circumference is provided on the outer side of the pressure ring 321. An inclined plate 329 is connected between the side of the support plate 328 away from the pressure ring 321 and the lower end surface of the circular pressure plate 311.

[0037] See also Figure 1 , Figure 5 and Figure 7The circumferential welding mechanism 4 includes a fixing ring 411 which is concentrically arranged on the outside of the pressure ring 321 and connected to the circumferentially arranged support plate 328. A support ring 412 located directly above the fixing ring 411 is connected between the upper ends of the circumferentially arranged inclined plates 329. An automatic welding machine 413 inclined toward the center direction of the pressure ring 321 is arranged on the inner side of the support ring 412. A rod 414 slidably connected to the fixing ring 411 is arranged at the lower end of the automatic welding machine 413. The rod 414 is a threaded telescopic rod installed at the lower end of the automatic welding machine 413. The telescopic end of the rod 414 is slidably connected to the upper end surface of the fixing ring 411. A guide ring 415 located between the support ring 412 and the fixing ring 411 is sleeved on the outside of the ring 312. A rod slidably connected to the guide ring 415 is arranged at the upper end of the automatic welding machine 413. 416, rod member 416 is a telescopic column with a pin hinged at the telescopic end and the pin is slidably connected to the guide ring 415, a bolt is installed at the fixed end of rod member 416 and the bolt is rotatably connected to the upper end of the automatic welding machine 413, a nut is also threadedly installed on the bolt, and a rotating drive assembly for driving the automatic welding machine 413 to rotate circumferentially is provided at the upper end of the support ring 412, the rotating drive assembly includes an outer gear ring 417 rotatably installed at the upper end of the support ring 412, a moving column 418 is installed at the upper end of the automatic welding machine 413, which is slidably connected to the outer gear ring 417 up and down and is located on the inner side of the support ring 412, a rotating gear 419 meshing with the outer gear ring 417 is rotatably installed on the upper end of the support ring 412, and the upper end of the rotating gear 419 is connected to the output shaft of the driving motor 420 installed at the upper end of the circular pressure plate 311.

[0038] See also Figure 1 , Figure 2 , Figure 5 and Figure 8The upper end of the fixed platform 1 is provided with a moving assembly for controlling the fixing mechanism 3 and the circumferential welding mechanism 4 to move downward as a whole. The moving assembly includes two vertical guide rails 11 installed on the upper end of the fixed platform 1 symmetrically about the three-jaw chuck 2. The moving plate 318 is installed between the left and right vertical guide rails 11 for sliding up and down. An electric slider 111 fixedly connected to the upper end surface of the moving plate 318 is slidably installed on the vertical guide rail 11. Side plates connected to the corresponding vertical guide rails 11 for sliding up and down are installed on the left and right sides of the fixed ring 411. A telescopic spring 11 sleeved on the outside of the corresponding vertical guide rail 11 is connected between the side plate and the moving plate 318. 2. A multi-stage telescopic rod 113 whose telescopic end is fixedly connected to the fixed platform 1 is installed at the lower end of the support plate 328. A connecting column 114 installed at the lower end of the support plate 328 is arranged on the side of the multi-stage telescopic rod 113 away from the fixed ring 411. Plug holes 115 evenly arranged up and down are provided on the side of the connecting column 114 away from the multi-stage telescopic rod 113. Connecting through holes 116 are provided at positions corresponding to the connecting columns 114 on the fixed platform 1. A sliding hole is provided on the inner wall of the connecting through hole 116. A plug rod 117 matching the corresponding plug hole 115 is slidably installed inside the sliding hole. A side spring 118 is connected between the plug rod 117 and the inner wall of the sliding hole.

[0039] See also Figure 1-Figure 9 , during operation: after completing the positioning between the flange and the pipeline, the movable plate 318 can be driven to move downward along the vertical guide rail 11 by the left and right electric sliders 111 at the same time, and the fixing mechanism 3 and the circumferential welding mechanism 4 can move downward synchronously as a whole. In this process, the movable plate 318 can drive the corresponding side plate to move downward along the vertical guide rail 11 through the telescopic spring 112, and the fixing ring 411 drives the pressure ring 321, the adjustment ring 323, the arc block, the arc spring 325, and the circumferentially arranged limiting rods 322 to move downward synchronously, and the pressure ring 321 gradually passes through the upper end of the pipeline and continues to move downward. Although the orientation of the mounting holes on the flange has been unified in advance, there may still be a gap between the limiting rod 322 and the corresponding mounting hole. The circumferentially arranged limit rods 322 can be inserted into the corresponding mounting holes at the same time, and the flange can be further limited and fixed in the circumferential direction by the cooperation between the limit rods 322 and the mounting holes.

[0040] In addition, the fixing ring 411 can also drive the circumferentially arranged support plate 328 to move downward synchronously with the side plate. At this time, the multi-stage telescopic rod 113 corresponding to the lower end of the support plate 328 is synchronously extended and retracted. The multi-stage telescopic rod 113 and the vertical guide rail 11 can be used to support and guide the downward movement of the fixing mechanism 3 and the circumferential welding mechanism 4 to ensure that both can move stably. In the process of the limit rod 322 cooperating with the mounting hole, the connecting column 114 moves synchronously with the corresponding support plate 328 to be inserted into the corresponding connecting through hole 116. When the connecting column 114 stops moving, the plug rod 117 and one of the plug holes 115, at this time, the plug rod 117 can be moved along the sliding hole under the action of the rebound force of the side spring 118 to be inserted into the plug hole 115. The plug-in cooperation between the connecting column 114 and the connecting through hole 116 can further increase the connection between the fixing mechanism 3, the circumferential welding mechanism 4 and the fixing table 1, thereby ensuring stable welding.

[0041] When the diameter of the flange to be welded changes, the radial position of the mounting hole on the flange changes synchronously. At this time, the limit rod 322 can compress the adjustment spring 327 on one side and slide accordingly along the strip groove 326 during the process of moving downward to contact the corresponding mounting hole. The limit rod 322 adapts to the radial position on the adjustment ring 323 to adapt to the change in the position of the mounting hole. When the length of the pipe to be welded changes, the limit rod 322 can always be inserted into the corresponding mounting hole to limit the flange, but the height of the overall downward movement of the fixing mechanism 3 and the circumferential welding mechanism 4 changes synchronously, and the downward position of the connecting column 114 along the connecting through hole 116 changes synchronously. At this time, the insertion rod 117 can cooperate with the sockets 115 at different positions on the connecting column 114 to ensure the connection between the connecting column 114 and the fixing platform 1.

[0042] When the movable plate 318 moves downward along the vertical guide rail 11, the circular pressing plate 311 can be driven to move downward synchronously by the push rod 317 and the control spring 319. The circular pressing plate 311 drives the circumferentially arranged inclined plate 329, the collar 312, the installation sleeve 313 and the support ring 412 to move downward synchronously. The tripod mechanism composed of the inclined plate 329 and the support plate 328 is conducive to increasing the overall relative stability of the fixing mechanism 3 and the circumferential welding mechanism 4. While the collar 312 moves downward, it gradually sleeves on the outside of the pipe, and the inner diameter of the collar 312 is much larger than the outer diameter of the pipe at this time. The circular pressing plate 311 gradually moves down to the upper end surface of the pipe to conflict with it, and the pipe is pressed. The circular pressing plate 311 presses the pipe to further fix the pipe on the flange. At the same time, the installation sleeve 313 can drive the circumferentially arranged arc clamping plate 3 14 enters the interior of the pipeline synchronously with the push plate 315, and then the movable plate 318 can continue to move downward along the vertical guide rail 11. Since the circular pressure plate 311 has been pressed against the upper end of the pipeline at this time, the movable plate 318 can drive the push rod 317 to move downward along the mounting sleeve 313 by compressing the control spring 319. The frustum section at the lower end of the push rod 317 can squeeze the circumferentially arranged push plate 315 to make the arc clamping plate 314 stretch the connecting spring 316 to move outward to press against the inner wall of the pipeline to achieve internal clamping of the pipeline, and the internal clamping assembly can perform the same effective internal clamping on pipelines of different inner diameters. When the length of the pipeline changes, the movable plate 318 drives the circular pressure plate 311 to change the position of pressing the upper end of the pipeline, so the overall downward position of the fixing mechanism 3 and the circumferential welding mechanism 4 changes synchronously.

[0043] With the cooperation of the guide ring 415, the fixed ring 411, the rod 1 414 and the rod 2 416, the automatic welding machine 413 can be synchronously moved downward to a suitable welding position with the support ring 412, and the outer gear ring 417, the rotating gear 419 and the driving motor 420 move synchronously with the circular pressure plate 311 and the support ring 412. After the internal clamping of the pipeline is completed, the rotating gear 419 can be driven to rotate by the driving motor 420, and the outer gear ring 417 drives the automatic welding machine 413 to rotate synchronously with the rotating gear 419 through the moving column 418. In this process, the automatic welding machine 413 can be moved around the space between the pipeline and the flange. The weld is circumferentially welded until the welding between the pipe and the flange is completely completed. During this process, the telescopic end of the rod 1 414 can rotate synchronously with the automatic welding machine 413 around the upper end surface of the fixing ring 411, and the telescopic end of the rod 2 416 can rotate synchronously with the automatic welding machine 413 around the guide ring 415. The rod 1 414 and the rod 2 416 can provide stable support for the automatic welding machine 413 during circumferential rotation welding, ensuring that the automatic welding machine 413 maintains a constant position and angle during welding, evenly completing the circumferential welding of the weld, ensuring welding accuracy and facilitating the improvement of welding efficiency.

[0044] When it is necessary to weld pipes of different diameters or lengths, the nut can be rotated to loosen the rod 416 and the bolt, and then the telescopic end of the rod 414 can be rotated to adjust the position of the automatic welder 413 in the up and down direction. The rod 416 is synchronously telescopic with the movement of the automatic welder 413 and rotates accordingly. After the adjustment is completed, the rotation angle of the rod 416 can be fixed by the cooperation between the bolt and the nut to ensure that the rod 414 and the rod 416 can always support the automatic welder 413. In addition, the automatic welder 413 can drive the moving column 418 to move up and down along the outer gear ring 417 accordingly, but the outer gear ring 417 can always drive the automatic welder 413 to rotate through the moving column 418. It should be noted that when welding pipes of different diameters or lengths with flanges of corresponding sizes, after completing the welding between the pipes and flanges of the same size batch, the required adjustment mechanisms and components can be uniformly adjusted to meet the welding requirements of different pipes and flanges.

[0045] After the welding between the flange and the pipe is completed, the electric slider 111 can be used to drive the moving plate 318 to synchronously move the fixing mechanism 3 and the circumferential welding mechanism 4 upward and reset. In this process, the push rod 317 is moved upward and reset to a position away from the push plate 315 under the action of the control spring 319, and the circumferentially arranged arc clamping plate 314 is reset to a position close to the mounting sleeve 313 under the action of the connecting spring 316 to release the inner clamping of the pipe. At the same time, the limit rod 322 is moved upward and separated from the flange, the connecting column 114 is moved upward and away from the fixing platform 1, and the multi-stage telescopic rod 113 is synchronously extended. After the fixing mechanism 3 and the circumferential welding mechanism 4 are moved up to a position away from the pipe and the flange, the three-jaw chuck 2 can release the clamping of the flange, and then the flange and the pipe can be removed from the three-jaw chuck 2. In the process of moving the pipe and the flange up, the adjusting rod 221 and the rectangular plate 213 are separated from the suppression of the pipe and moved up and reset under the action of the bottom spring 214. The rectangular plate 213 drives the abutment plate 215 and the auxiliary plate 223 to rotate and reset away from the inner wall of the pipe through the vertical rod 217, the pin rod and the elastic telescopic connecting rod 216, so as to smoothly remove the welded pipe and flange as a whole.

[0046] In the embodiments of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A flange automatic welding device, comprising a fixing table (1), characterized in that: A three-jaw chuck (2) for clamping the flange is arranged at the upper end of the fixing platform (1), and a fixing mechanism (3) for fixing the flange and the pipeline and a circumferential welding mechanism (4) for welding the pipeline to the flange are arranged above the fixing platform (1); The fixing mechanism (3) comprises a circular pressing plate (311), a sleeve (312) is installed at the lower end of the circular pressing plate (311), an inner clamping assembly for clamping the pipe is arranged inside the sleeve (312), a pressing ring (321) is arranged below the circular pressing plate (311), a circumferentially evenly arranged limiting rods (322) are arranged at the lower end of the pressing ring (321), an adjusting member for adjusting the position of the limiting rods (322) is arranged at the lower end of the pressing ring (321), a circumferentially evenly arranged supporting plate (328) is arranged outside the pressing ring (321), an inclined plate (329) is connected between the side of the supporting plate (328) away from the pressing ring (321) and the lower end surface of the circular pressing plate (311), and a positioning assembly for centrally positioning the pipe is arranged at the middle of the upper end of the three-jaw chuck (2); The circumferential welding mechanism (4) comprises a fixing ring (411) which is coaxially arranged on the outside of the pressure ring (321) and connected to the circumferentially arranged support plates (328); a support ring (412) located directly above the fixing ring (411) is connected between the upper ends of the circumferentially arranged inclined plates (329); an automatic welding machine (413) which is inclined toward the center direction of the pressure ring (321) is arranged on the inner side of the support ring (412); and a lower end of the automatic welding machine (413) is provided. A rod member 1 (414) is slidably connected to a fixed ring (411); a guide ring (415) is sleeved on the outside of the collar (312) and is located between the support ring (412) and the fixed ring (411); a rod member 2 (416) slidably connected to the guide ring (415) is arranged at the upper end of the automatic welding machine (413); and a rotation driving component for driving the automatic welding machine (413) to rotate circumferentially around the collar (312) is arranged at the upper end of the support ring (412).

2. The automatic flange welding device according to claim 1, characterized in that: The positioning assembly comprises a rectangular groove (211) formed in the middle of the upper end of the three-jaw chuck (2); a fixing column (212) is installed in the middle of the rectangular groove (211); the upper end of the fixing column (212) is in the shape of a truncated cone; a rectangular plate (213) is arranged inside the rectangular groove (211) and is slidably matched with the fixing column (212) in an upward and downward manner; two bottom springs (214) are connected between the rectangular plate (213) and the bottom wall of the rectangular groove (211) and are symmetrical with respect to the fixing column (212); a spring (214) is arranged above the rectangular plate (213) and is symmetrical with respect to the fixing column (212); ) are provided with two symmetrical abutment plates (215) on the left and right sides, an elastic telescopic connecting rod (216) is hingedly connected between the abutment plates (215) and the upper ends of the fixed columns (212), a sliding groove (218) is provided on the fixed section of the elastic telescopic connecting rod (216), two vertical rods (217) distributed front and rear about the elastic telescopic connecting rod (216) are hingedly connected at the positions of the upper ends of the rectangular plates (213) corresponding to the elastic telescopic connecting rod (216), and a pin rod slidably connected to the corresponding sliding groove (218) is rotatably installed between the two vertical rods (217) opposite to each other.

3. The automatic flange welding device according to claim 1, characterized in that: The inner clamping assembly comprises a mounting sleeve (313) mounted at the lower end of the circular pressure plate (311) and located inside the collar (312); an arc-shaped clamping plate (314) evenly arranged in the circumferential direction is arranged outside the mounting sleeve (313); a push plate (315) slidingly penetrating the mounting sleeve (313) is mounted inside the arc-shaped clamping plate (314); a side of the push plate (315) away from the arc-shaped clamping plate (314) is provided with an inclined surface; and the arc-shaped clamping plate (314) and the mounting sleeve (313) are connected to each other. Two connecting springs (316) distributed up and down with respect to the corresponding push plates (315) are connected between the outer annular surfaces of the mounting sleeve (313), a push rod (317) is slidably mounted up and down inside the mounting sleeve (313), a frustum section is arranged at the lower end of the push rod (317), the push rod (317) is mounted at the lower end of the moving plate (318), and a control spring (319) sleeved on the outside of the push rod (317) is connected between the moving plate (318) and the circular pressure plate (311).

4. The automatic flange welding device according to claim 3 is characterized in that: The upper end of the fixed platform (1) is provided with a moving assembly for controlling the fixing mechanism (3) and the circumferential welding mechanism (4) to move downward as a whole, the moving assembly comprising two vertical guide rails (11) symmetrically mounted on the upper end of the fixed platform (1) with respect to the three-jaw chuck (2), the moving plate (318) being mounted between the two vertical guide rails (11) for sliding up and down movement, an electric slider (111) fixedly connected to the upper end surface of the moving plate (318) being slidably mounted on the vertical guide rail (11), side plates slidably connected to the corresponding vertical guide rails (11) being mounted on the left and right sides of the fixed ring (411), a telescopic spring (112) sleeved on the outside of the corresponding vertical guide rail (11) being connected between the side plate and the moving plate (318).

5. The automatic flange welding device according to claim 1, characterized in that: The adjusting member comprises an adjusting ring (323) rotatably mounted on the inner side of the pressing ring (321); an arc-shaped groove (324) is provided at the lower end of the pressing ring (321); an arc-shaped block slidably connected to the arc-shaped groove (324) is installed on the outer side of the adjusting ring (323); an arc-shaped spring (325) is connected between groove walls corresponding to the arc-shaped groove (324) on both sides of the arc-shaped block; a strip groove (326) evenly arranged in the circumferential direction and extending in the radial direction of the pressing ring (321) is provided at the lower end of the adjusting ring (323); an upper end of the limiting rod (322) is slidably connected to the strip groove (326); the lower end of the limiting rod (322) is in an inverted truncated cone shape; an adjusting spring (327) is connected between the inner and outer sides of the upper end of the limiting rod (322) and the groove walls corresponding to the strip groove (326) 6. The automatic flange welding device according to claim 1, characterized in that: The rotary drive assembly comprises an outer gear ring (417) rotatably mounted on the upper end of a support ring (412); a movable column (418) slidably connected to the outer gear ring (417) and located inside the support ring (412) is mounted on the upper end of the automatic welding machine (413); a rotating gear (419) meshing with the outer gear ring (417) is rotatably mounted on the upper end of the support ring (412); and the upper end of the rotating gear (419) is connected to the output shaft of a driving motor (420) mounted on the upper end of a circular pressure plate (311).

7. The automatic flange welding device according to claim 1, characterized in that: The lower end of the support plate (328) is provided with a multi-stage telescopic rod (113) whose telescopic end is fixedly connected to the fixed platform (1); a connecting column (114) installed at the lower end of the support plate (328) is provided on the side of the multi-stage telescopic rod (113) away from the fixed ring (411); a side of the connecting column (114) away from the multi-stage telescopic rod (113) is provided with plug holes (115) evenly arranged up and down; a connecting through hole (116) is provided at a position corresponding to the connecting column (114) on the fixed platform (1); a sliding hole is provided on the inner wall of the connecting through hole (116); an insert rod (117) matching the corresponding insert hole (115) is slidably installed inside the sliding hole; a side spring (118) is connected between the insert rod (117) and the inner wall of the sliding hole.

8. The automatic flange welding device according to claim 2, characterized in that: The rectangular plate (213) is provided with an adjustment groove located between two corresponding vertical rods (217) on both left and right sides, and the bottom wall of the adjustment groove is provided with square holes (219) evenly arranged on the left and right sides. An adjustment rod (221) is arranged inside the adjustment groove, and a square block (222) pluggable and matched with the corresponding square hole (219) is installed at the lower end of the adjustment rod (221).

9. The automatic flange welding device according to claim 2, characterized in that: An auxiliary plate (223) is provided on one side of the abutment plate (215) away from the corresponding elastic telescopic connecting rod (216), and auxiliary springs (224) evenly arranged up and down are connected between the auxiliary plate (223) and the abutment plate (215).

10. The automatic flange welding device according to claim 1, characterized in that: The rod member 1 (414) is a threaded telescopic rod installed at the lower end of the automatic welding machine (413); the telescopic end of the rod member 1 (414) is slidably connected to the upper end surface of the fixing ring (411); the rod member 2 (416) is a telescopic column with a pin hinged at the telescopic end and the pin slidably connected to the guide ring (415); a bolt is installed at the fixed end of the rod member 2 (416) and the bolt is rotatably connected to the upper end of the automatic welding machine (413); a nut is also threadedly installed on the bolt.

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