Automatic pipeline welding device

Abstract

The invention discloses an automatic pipeline welding device, and particularly relates to the technical field of pipeline welding, the automatic pipeline welding device comprises a first fixing frame and a first motor, two symmetrically-distributed L-shaped frames are slidably arranged at the top of a buckle, a mounting frame is fixed to the middle of the front side of the upper end of the first fixing frame, and a plurality of first guide rods are mounted on the left side and the right side of the vertical part of the mounting frame correspondingly; limiting mechanisms are fixed to the rear sides of the horizontal parts of the two L-shaped frames, a bearing welding mechanism is fixed to the middle of the upper end of the first fixing frame, and the lower portions of the two limiting mechanisms are in threaded connection with the threaded rod. According to the automatic pipeline welding device, after a metal pipeline is placed on the bearing and welding mechanism, under the action of the gravity of the metal pipeline, a guide mechanism can be driven to drive a swing structure to synchronously operate, a third roller is automatically attached to the outer surface of the metal pipeline, the swing structure does not need to be adjusted independently, and the labor intensity of workers is reduced. And meanwhile, an additional welding robot is not needed, and the cost can be reduced while the automation degree of the device is improved.

Description

Technical Field

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

[0002] A pipeline is a device connected by pipes, pipe connectors and valves for transporting gas, liquid or fluid with solid particles.

[0003] Pipeline welding is widely used in the construction of mechanical equipment and pipeline systems. When pipelines are used in pipeline projects in the fields of oil, gas, liquid, and sample transportation, the requirements for pipeline docking and welding are very strict during on-site construction. At this time, factors such as pipeline docking positioning accuracy, welding process stability, and welding construction space are very important, which requires welding equipment to have technical advantages to ensure positioning accuracy and welding quality.

[0004] The Chinese patent document with the publication number CN118699618A discloses an automatic pipeline welding device, including a guide rail, a roller mechanism for driving the pipeline to rotate, a support mechanism including a slide, a slide plate on the slide and a support plate; a positioning mechanism including a positioning plate, a coarse positioning pin inserted on the positioning plate, a positioning cylinder and a fine positioning pin arranged on the outer end face of the positioning plate; a clamping mechanism including a clamping cylinder and a clamping claw fixedly connected to the guide rod of the clamping cylinder; a driving mechanism for driving the roller mechanism and the support mechanism to move on the guide rail; and a welding robot for welding flanges on pipelines. The above patent document discloses an automatic pipeline welding device that can realize rapid centering of the flange and the pipeline through double positioning, locate the flange connection surface through a reference plane and realize automatic welding; However, the above patent documents still have the following defects in the implementation process: Although the above patent can fix the pipeline during implementation, a separate welding robot is still needed to perform the welding operation during the subsequent welding process, which increases the production cost. Summary of the invention

[0005] The main purpose of the present invention is to provide an automatic pipeline welding device, which can effectively solve the problem that a separate welding robot is required to perform welding operations in the subsequent welding process, thereby increasing production costs.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A pipeline automatic welding device comprises a fixing frame, a plurality of slide rails, a threaded rod and a motor, wherein the plurality of slide rails are fixed on the top of the fixing frame, the tops of the plurality of slide rails are slidably provided with a plurality of buckles adapted to the slide rails, the threaded rod is rotatably mounted on the middle of the upper end of the fixing frame, the motor is mounted on one side of the top of the fixing frame, and its load end is fixedly connected to one end of the threaded rod through a coupling; There are two symmetrically distributed L-shaped frames sliding on the top of the buckle, a mounting frame is fixed to the middle of the front upper end of the fixing frame, multiple guide rods are installed on the left and right sides of the vertical part of the mounting frame, and limiting mechanisms are fixed to the rear sides of the horizontal parts of the two L-shaped frames, a supporting welding mechanism is fixed to the middle of the upper end of the fixing frame, and the lower parts of the two limiting mechanisms are threadedly connected to the threaded rod.

[0007] Preferably, the limit mechanism comprises a hydraulic cylinder fixed on the top of the horizontal part of the L-shaped frame and two concave fixing blocks, the output end piston rod of the hydraulic cylinder passes through the L-shaped frame and extends to the lower part, the lower part of the piston rod of the hydraulic cylinder is equipped with a connecting plate, and the lower end of the piston rod of the hydraulic cylinder is fixed with a buffer mechanism, the concave fixing block located at the upper part is fixed to the lower part of the buffer mechanism, the concave fixing block located at the lower part is fixed to the buckle on the same side and is threadedly connected to the threaded rod, and the front and rear parts of the two concave fixing blocks close to each other are both rotated with a roller, and the upper ends of the concave fixing blocks located at the upper part are both fixed with a ruler distributed front and back, the front and rear sides of the concave fixing blocks located at the upper part near the center of the fixing frame are both threadedly connected to the limiting rod, and the front and rear sides of the concave fixing blocks located at the lower part near the middle part of the fixing frame are both fixed with a lower supporting block matching the limiting rod on the same side, and the front sides of the two concave fixing blocks on the same side are commonly fixed with a driving part.

[0008] Preferably, the buffer mechanism comprises a shell 1, an inner cavity of the shell 1 slides on the outer surface of the piston rod, a spring 1 is installed in the inner cavity of the shell 1, and the top of the spring 1 is fixedly connected to the lower end of the piston rod.

[0009] Preferably, the driving part includes a rack fixed to the front part of the connecting plate 1 and a fixing frame 2 fixed to the buckle on the same side, driving plates are fixed on the front and rear sides of the rack, a gear is rotated on the top of the fixing frame 2, the rack and the gear are meshed with each other, a driving mechanism 1 is commonly fixed to the gear and the middle part of the front and rear ends of the fixing frame 2, L-shaped plates are fixed to the upper part of the front and rear ends of the fixing frame 2, and a pushing mechanism is commonly fixed to one side of the two L-shaped plates close to the concave fixing block.

[0010] Preferably, the pushing mechanism includes two limiting rings, a fixing rod 1 slides together in the inner cavity of the two limiting rings, two springs are respectively fixed to the two sides of the fixing rod 1 and the limiting rings on the same side, a rubber driving wheel 1 is fixed to the middle part of the outer surface of the fixing rod 1, limiting circular rings are rotated on the left and right sides of the outer surface of the fixing rod 1, two guide rods 2 are fixed to the front of the outer surfaces of the two limiting circular rings, the two guide rods 2 on the same side slide on the outer surface of the L-shaped plate on the same side, and the front parts of the two driving mechanisms 1 are installed on the outermost side of the outer surface of the fixing rod 1.

[0011] Preferably, the supporting welding mechanism includes a base fixed at the middle part of the top end of a fixed frame, and concave supporting blocks are symmetrically installed on the upper end of the base, and two rollers are rotated at the front and rear of the two concave supporting blocks, and a guide mechanism is fixed on the rear side of the middle part of the base, and a swing structure is fixed on the upper part of the guide mechanism.

[0012] Preferably, the guide mechanism includes two fixed wheels, both of which are rotated on the rear side of the upper end of the base, an extension rod 1 is fixed to the front of the outer surfaces of the two fixed wheels, an extension rod 2 is rotated on the upper part of the outer surfaces of the two fixed wheels, a spring 3 is commonly fixed between the outer surfaces of the extension rod 1 and the outer surfaces of the extension rod 2 on the same side, a counterweight is fixed to the front of the outer surfaces of the two fixed wheels, and a roller 3 is rotated at the front end of the two extension rods 1.

[0013] Preferably, the swing structure includes two rubber driving wheels rotating on the front side of the upper outer surface of the two extension rods and two shaft rods rotating on the rear side of the upper outer surface of the two extension rods, a driving mechanism is commonly fixed between the two shaft rods and the two rubber driving wheels on the same side, a welding gun is commonly rotated at the upper ends of the two extension rods, and a swing mechanism is fixed to the middle of the two shaft rods.

[0014] Preferably, the rocking mechanism includes a mounting wheel fixed to the middle part of the outer surface of the second shaft rod, two wavy rings are fixed to the outer surface of the mounting wheel, a clamp is placed between the two wavy rings, a fixing frame three is rotatably provided in the middle part of the outer surface of the clamp, and both ends of the fixing frame three are respectively fixed to the outer surfaces of the two extension rods.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, after the metal pipe is placed between four rollers, the metal pipe can be automatically fixed by starting the hydraulic cylinder. The buffer mechanism, the limit rod and the lower support block can also be provided to protect the integrity of the metal pipe during the process of fixing the metal pipe to prevent excessive clamping.

[0016] 2. In the present invention, by adjusting the position of the limit rod 1, the four rollers 1 can be applied to metal pipes of various sizes, thereby increasing the clamping range.

[0017] 3. In the present invention, the clamping process and the driving process are linked. After the four rollers fix the metal pipe, the hydraulic cylinder continues to operate, which can drive the driving part to drive the metal pipe to rotate. No additional power source is required, which improves the utilization rate of energy and reduces energy waste.

[0018] 4. In the present invention, after the metal pipe is placed on the supporting welding mechanism, the guide mechanism can be driven to drive the swing structure to run synchronously under the action of the gravity of the metal pipe, and the roller three can be automatically attached to the outer surface of the metal pipe. There is no need to adjust the swing structure separately, and no additional welding robot is required. While improving the automation degree of the device, it can also reduce costs.

[0019] 5. In the present invention, by cooperating with each other between the wave-shaped ring and the clamping plate, the clamping plate can be driven to swing as a whole during the rotation of the metal pipe, and finally the roller three can swing when welding two metal pipes, automatically welding the metal pipes, making the welding trajectory zigzag, thereby increasing the welding area and welding strength.

[0020] 6. In the present invention, the power source for the overall swing of the clamping plate also comes from the power generated by the metal pipe during the rotation process, and no additional power source is required, which further improves the utilization rate of energy and reduces energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention after loading the metal pipe; Figure 2 This is a schematic diagram of another viewing angle of the overall structure of the present invention after loading the metal pipe; Figure 3 This is a schematic diagram of the overall structure of the present invention without loading metal pipes; Figure 4 It is a schematic diagram of the overall structure of the limiting mechanism of the present invention; Figure 5 It is a schematic diagram of the overall structure of the limiting mechanism of the present invention from another viewing angle; Figure 6 For the present invention Figure 5 The enlarged schematic diagram at C in the middle; Figure 7 For the present invention Figure 5 The enlarged schematic diagram at A in the middle; Figure 8 For the present invention Figure 7 The enlarged schematic diagram of point B in the middle; Fig. 9 It is a schematic diagram of the overall structure of the supporting welding mechanism of the present invention; Fig.10 It is a schematic diagram of the overall structure of the guide mechanism and the swing structure of the present invention; Fig.11 For the present invention Fig.10 Enlarged schematic diagram at point D in the middle.

[0022] In the figure: 1, a fixing frame; 2, a slide rail; 3, a threaded rod; 4, a limiting mechanism; 41, a hydraulic cylinder; 42, a connecting plate; 43, a buffer mechanism; 431, a housing; 432, a spring; 44, a scale; 45, a limiting rod; 46, a concave fixing block; 47, a driving part; 471, a rack; 472, a driving plate; 473, a driving mechanism; 474, a gear; 475, a fixing frame; 476, an L-shaped plate; 477, a pushing mechanism; 4771, a limiting ring; 4772, a spring; 4773, a fixing rod; 4774, a limiting ring; 4775, a guide rod; 4776, a rubber driving wheel; 48, a lower bearing Support block; 49, roller one; 5, mounting frame; 6, guide rod one; 7, L-shaped frame; 8, motor one; 9, supporting welding mechanism; 91, base; 92, concave support block; 93, guide mechanism; 931, fixed wheel; 932, counterweight; 933, extension rod one; 934, roller three; 935, extension rod two; 936, spring three; 94, swing structure; 941, rubber driving wheel two; 942, driving mechanism two; 943, welding gun; 944, swing mechanism; 9441, mounting wheel; 9442, wavy ring; 9443, fixed frame three; 9444, splint; 945, shaft rod two; 95, roller two; 10, metal pipe. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] Embodiment 1, as Figure 1 , Figure 2 and Figure 3 As shown, a pipeline automatic welding device includes a fixed frame 1, a plurality of slide rails 2, a threaded rod 3 and a motor 8, the plurality of slide rails 2 are fixed on the top of the fixed frame 1, the tops of the plurality of slide rails 2 are slidably provided with a plurality of buckles adapted to the slide rails 2, the threaded rod 3 is rotatably mounted on the middle part of the upper end of the fixed frame 1, the motor 8 is mounted on one side of the top of the fixed frame 1, and its load end is fixedly connected to one end of the threaded rod 3 through a coupling; There are two symmetrically distributed L-shaped frames 7 sliding on the top of the buckle, a mounting frame 5 is fixed to the middle of the front upper end of the fixing frame 1, and multiple guide rods 6 are installed on the left and right sides of the vertical part of the mounting frame 5. The rear sides of the horizontal parts of the two L-shaped frames 7 are fixed with limiting mechanisms 4, and a supporting welding mechanism 9 is fixed to the middle of the upper end of the fixing frame 1. The lower parts of the two limiting mechanisms 4 are threadedly connected with the threaded rod 3.

[0025] In this case, the lengths of the fixed frame 1, the plurality of slide rails 2, the threaded rod 3 and the plurality of guide rods 6 can be extended or shortened according to the specific implementation scenario.

[0026] The plurality of guide rods 6 mentioned above are all slid on the mounting frame 5, and the plurality of guide rods 6 are guided by the mounting frame 5 so that the guide rods 6 can only move horizontally. The mounting frame 5 shown in the figure is only one implementation of the present embodiment, and other implementations are all acceptable as long as they meet the above technical effects and do not affect the operation of the L-shaped frame 7 and other structures; Before implementation of this embodiment, the distance between the two L-shaped frames 7 is first adjusted to the center of gravity of the metal pipe 10 according to the diameter of the metal pipe 10 to prevent the contact surface from warping after the two metal pipes 10 are placed inside the limiting mechanism 4 and the supporting welding mechanism 9, so that the contact surface of the two metal pipes 10 is flat and the contact quality is improved.

[0027] During the implementation of this embodiment, the distance between the two L-shaped frames 7 and the two limiting mechanisms 4 is adjusted according to the length of the metal pipe 10 through the motor 8 and the threaded rod 3, and then the two metal pipes 10 are placed on the two limiting mechanisms 4 respectively, and the contact surfaces of the two metal pipes 10 are placed on the upper part of the supporting welding mechanism 9, and the contact surfaces between the metal pipes 10 are adjusted, and then the limiting mechanism 4 is opened to fix the metal pipes 10. After fixation, the limiting mechanism 4 continues to operate to drive the two metal pipes 10 to rotate, and then drives the supporting welding mechanism 9 to operate to perform welding operations on the contact surfaces of the two metal pipes 10.

[0028] Specifically, in order to achieve the above-mentioned purpose of fixing the metal pipe 10 before welding, refer to Figure 4 and Figure 5 In this embodiment, the limiting mechanism 4 includes a hydraulic cylinder 41 and two concave fixing blocks 46 fixed on the top of the horizontal part of the L-shaped frame 7. The piston rod of the output end of the hydraulic cylinder 41 passes through the L-shaped frame 7 and extends to the lower part. A connecting plate 42 is installed at the lower part of the piston rod of the hydraulic cylinder 41. A buffer mechanism 43 is fixed to the lower end of the piston rod of the hydraulic cylinder 41. The concave fixing block 46 located at the upper part is fixed to the lower part of the buffer mechanism 43. The concave fixing block 46 located at the lower part is fixed on the buckle on the same side and is threadedly connected to the threaded rod 3. The front and rear parts of the sides of the two concave fixing blocks 46 close to each other are both rotated with a roller 49. The upper ends of the concave fixing blocks 46 located at the upper part are both fixed with scales 44 distributed front and back. The front and rear sides of the side of the concave fixing block 46 located at the upper part near the center of the fixing frame 1 are both threadedly connected with the limiting rod 45. The front and rear sides of the side of the concave fixing block 46 located at the lower part near the middle part of the fixing frame 1 are both fixed with a lower supporting block 48 matching the limiting rod 45 on the same side. Before implementation, first adjust the height of the lower ends of the two limit rods 45 on the same side according to the diameter of the metal pipe 10, so that after the two limit rods 45 on the same side enter the inner cavity of the lower supporting block 48 on the same side, the space formed by the four rollers 49 can be suitable for the current metal pipe 10, to prevent the metal pipe 10 from being deformed due to excessive extrusion, thereby causing damage to the metal pipe 10.

[0029] During the implementation of this embodiment, the center of gravity of the metal pipe 10 is placed on the two rollers 49 located at the bottom, the position to be welded is placed on the supporting welding mechanism 9, and the hydraulic cylinder 41 is turned on to drive the connecting plate 42, the buffer mechanism 43 and the concave fixing block 46 located at the top to move downward synchronously. The metal pipe 10 is squeezed and fixed by the two rollers 49 located at the top and the two rollers 49 located at the bottom. At this time, the two concave fixing blocks 46 will not get closer. During the subsequent operation of the hydraulic cylinder 41, the moving length of the piston rod of the hydraulic cylinder 41 is buffered by the buffer mechanism 43. At this time, the piston rod of the hydraulic cylinder 41 starts to drive the driving part 47 to operate, and the metal pipe 10 is driven by the driving part 47 to start rotating, so as to facilitate the subsequent welding operation of the metal pipe 10.

[0030] Specifically, in order to achieve the above-mentioned purpose of buffering the moving length of the piston rod of the hydraulic cylinder 41, refer to Figure 5 and Figure 6 In this embodiment, the buffer mechanism 43 includes a shell 431, the inner cavity of the shell 431 slides on the outer surface of the piston rod, the inner cavity of the shell 431 is installed with a spring 432, and the top of the spring 432 is fixedly connected to the lower end of the piston rod; The lower end of the shell 431 is fixedly connected to the middle of the concave fixed block 46 located at the upper part. When the piston rod of the hydraulic cylinder 41 continues to run after the concave fixed block 46 located at the upper part stops moving, the piston rod can squeeze the spring 432. The spring 432 is deformed in the process to buffer the displacement generated by the piston rod during the downward movement.

[0031] Specifically, in order to achieve the above-mentioned purpose of driving the metal pipe 10 to rotate after the metal pipe 10 is fixed, refer to Figure 7 and Figure 8In this embodiment, a driving part 47 is commonly fixed to the front sides of the two concave fixing blocks 46 on the same side. The driving part 47 includes a rack 471 fixed to the front part of the connecting plate 1 42 and a fixing frame 2 475 fixed to the buckle on the same side. Driving plates 472 are fixed to the front and rear sides of the rack 471. A gear 474 is rotatably arranged on the top of the fixing frame 2 475. The rack 471 and the gear 474 are meshed with each other. A driving mechanism 1 473 is commonly fixed to the middle parts of the front and rear ends of the gear 474 and the fixing frame 2 475. L-shaped plates 476 are fixed to the upper parts of the front and rear ends of the fixing frame 2 475. A pushing mechanism 477 is commonly fixed to the two L-shaped plates 476 on one side close to the concave fixing block 46.

[0032] Depend on Figure 7 It can be seen that the lower part of the two driving plates 472 near the roller 1 49 has an inclined surface, which can facilitate driving the fixing rod 1 4773 toward the direction of the roller 1 49 .

[0033] For further information, see Figure 8 In this embodiment, the pushing mechanism 477 includes two limiting rings 4771, and a fixing rod 4773 slides together in the inner cavities of the two limiting rings 4771. Springs 4772 are fixed to the two sides of the fixing rod 4773 and the limiting rings 4771 on the same side. A rubber driving wheel 4776 is fixed to the middle of the outer surface of the fixing rod 4773. The limiting rings 4774 rotate on the left and right sides of the outer surface of the fixing rod 4773. Two guide rods 4775 are fixed to the front of the outer surfaces of the two limiting rings 4774. The two guide rods 4775 on the same side slide on the outer surface of the L-shaped plate 476 on the same side. The front parts of the two driving mechanisms 473 are installed on the outermost side of the outer surface of the fixing rod 4773.

[0034] Since the outer side of the rubber driving wheel 4776 is made of rubber material, it can be deformed during its implementation, thereby increasing the contact area between the rubber driving wheel 4776 and the metal pipe 10 and improving the driving effect.

[0035] Depend on Figure 7 It can be known that the two driving mechanisms 473 mentioned above are composed of two pulleys 1, a tensioning wheel, a transmission belt 1 and two shafts 1. A set of transmission belts is arranged on the outer surface of the two pulleys 1 and the outer surface of the tensioning wheel. The two shafts 1 are respectively fixedly installed on the axis of the pulley 1 located at the upper part and rotatably installed on the axis of the tensioning wheel located in the middle part. The tensioning wheel located at the upper part is fixedly connected to the axis of the gear 474. The shaft 1 located in the middle part is slidably connected to the fixing frame 2 475. A spring 4 is arranged between the shaft 1 located in the middle part and the fixing frame 2 475, so as to play the role of the tensioning wheel tightening the transmission belt 1. Depend on Figure 8It can be seen that the pulley 1 located at the lower part is fixed on the outside of the fixed rod 4773 and is used to drive the fixed rod 4773 to rotate.

[0036] In the above, after the four rollers 49 fix the metal pipe 10, the piston rod of the hydraulic cylinder 41 continues to move downward. During this process, the connecting plate 42 can drive the rack 471 and the driving plate 472 to continue to move downward synchronously. Through the meshing between the rack 471 and the gear 474, the gear 474 can be driven to rotate, and then the fixing rod 4773 is driven to rotate through the shaft rod 1, the two pulleys 1, the tensioning wheel and the transmission belt 1, and finally the rubber driving wheel 4776 is driven to rotate synchronously; When the two driving plates 472 are respectively fitted with the limiting rings 4774 on the same side, the driving plates 472 can drive the rubber driving wheel 4776 to move closer to the roller 49 under the guidance of the limiting rings 4771 and other components while continuing to move downward, and finally make the rubber driving wheel 4776 close to the outer surface of the metal pipe 10, so that the rubber driving wheel 4776 can drive the metal pipe 10 to rotate, which is convenient for subsequent welding operations and full welding of the weld. In addition, the guide rod 2 4775 can limit the limiting ring 4774 to prevent it from rotating synchronously with the fixing rod 1 4773; When welding is completed, the driving plate 472 is separated from the limiting ring 4774, and under the action of the spring 2 4772 and the like, the rubber driving wheel 1 4776 can be driven to separate from the metal pipe 10 and finally return to the initial position.

[0037] Embodiment 2: Based on Embodiment 1, this embodiment supports the position where the metal pipe 10 needs to be welded, and performs welding operations on two metal pipes 10.

[0038] To achieve the above purpose, see Fig. 9 In this embodiment, the supporting welding mechanism 9 includes a base 91 fixed at the middle of the top of the fixing frame 1, and concave support blocks 92 are symmetrically installed on the upper end of the base 91. The front and rear parts of the two concave support blocks 92 are both rotated with rollers 95. A guide mechanism 93 is fixed to the rear side of the middle part of the base 91, and a swing structure 94 is fixed to the upper part of the guide mechanism 93; For further information, see Fig.10 In this embodiment, the guide mechanism 93 includes two fixed wheels 931, and the two fixed wheels 931 are rotated on the rear side of the upper end of the base 91. An extension rod 1 933 is fixed to the front of the outer surface of the two fixed wheels 931, and an extension rod 2 935 is rotated on the upper part of the outer surface of the two fixed wheels 931. A spring 3 936 is fixed between the outer surface of the extension rod 1 933 and the outer surface of the extension rod 2 935 on the same side. A counterweight block 932 is fixed to the front of the outer surface of the two fixed wheels 931, and a roller 3 934 is rotated at the front end of the two extension rods 1 933; First, when the metal pipe 10 is not placed on the four rollers 2 95, the extension rod 1 933 is in an inclined state, and the horizontal height of the roller 3 934 is greater than the horizontal height of the counterweight 932; After the metal pipe 10 is placed on the four rollers 2 95 , under the squeezing of the metal pipe 10 , the extension rod 1 933 is also inclined. At this time, the horizontal height of the counterweight block 932 is greater than the horizontal height of the roller 3 934 . At the same time, under the squeezing of the metal pipe 10 , the angle between the extension rod 2 935 and the extension rod 1 933 increases, so that the swing structure 94 is tightly attached to the outer surface of the metal pipe 10 .

[0039] In this case, the counterweight block 932 is provided to change the initial tilt state of the extension rod 933 to prevent the metal pipe 10 from causing squeezing damage to the swing structure 94 during the placement of the metal pipe 10.

[0040] Specifically, in order to facilitate welding of the two metal pipes 10, refer to Fig.10 and Fig.11 In this embodiment, the swing structure 94 includes two rubber driving wheels 941 respectively rotating on the front side of the upper outer surface of the two extension rods 935 and a shaft rod 945 rotating on the rear side of the upper outer surface of the two extension rods 935. A driving mechanism 942 is fixed between the shaft rod 945 and the rubber driving wheel 941 on the same side. A welding gun 943 is rotated on the upper ends of the two extension rods 935. A swing mechanism 944 is fixed in the middle of the shaft rod 945. The welding gun 943 mentioned above rotates on the two extension rods 935, and its rotation direction is horizontal rotation. During the implementation process, the welding gun 943 can be rotatably installed on the two extension rods 935 using a clamp in the prior art. This method can facilitate the disassembly, maintenance and replacement of the welding gun 943.

[0041] The driving mechanism 2 942 mentioned above is similar in principle to the driving mechanism 1 473. The driving mechanism 2 942 in this case is composed of a shaft rod 3, two pulleys 2 and a transmission belt 2. The transmission belt 2 is sleeved on the outer surfaces of the two pulleys 2. The shaft rod 3 is fixed on the axis of the rubber driving wheel 2 941, one of the pulleys 2 is fixed on the shaft rod, and the other pulley 2 is fixed on the axis of the shaft rod 2 945, so that the power on the rubber driving wheel 2 941 can be transmitted to the shaft rod 2 945.

[0042] For further information, see Fig.11In this embodiment, the swing mechanism 944 includes a mounting wheel 9441 fixed to the middle part of the outer surface of the shaft rod 945, two wavy rings 9442 are fixed to the outer surface of the mounting wheel 9441, a clamping plate 9444 is placed between the two wavy rings 9442, a fixing frame 3 9443 is rotatably provided in the middle part of the outer surface of the clamping plate 9444, and the two ends of the fixing frame 3 9443 are respectively fixed to the outer surfaces of the two extension rods 935.

[0043] Depend on Fig.11 It can be seen that the middle part of the fixing frame 3 9443 is hollow, the middle part of the clamping plate 9444 rotates in the cavity position of the fixing frame 3 9443, and the clamping plate 9444 can rotate left and right in the vertical direction; In addition, the top of the splint 9444 is concave, and the bottom of the splint 9444 is spherical. The roller three 934 is placed in the concave part. When the splint 9444 swings, the roller three 934 can be driven to swing synchronously. The sphere at the bottom of the splint 9444 can facilitate the splint 9444 to move between the two wavy rings 9442.

[0044] During the rotation of the second shaft rod 945, the mounting wheel 9441 can be driven to rotate synchronously, and then the two wavy rings 9442 can be driven to rotate synchronously. Through the wavy bending trajectory between the two wavy rings 9442 and in coordination with the ball at the bottom of the splint 9444, the splint 9444 can be driven to swing as a whole, and finally the roller three 934 can swing when welding the two metal pipes 10, so that the welding trajectory is in a zigzag shape, achieving the effect of "fish scale welding" in the industry, and increasing the welding area and welding strength.

[0045] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pipeline automatic welding device, comprising a fixing frame (1), a plurality of slide rails (2), a threaded rod (3) and a motor (8), characterized in that: The plurality of slide rails (2) are fixed on the top of the fixing frame (1), and the top of the plurality of slide rails (2) are provided with a plurality of clips adapted to the slide rails (2) for sliding movement. The threaded rod (3) is rotatably mounted on the middle of the upper end of the fixing frame (1), and the motor (8) is mounted on one side of the top of the fixing frame (1), and its load end is fixedly connected to one end of the threaded rod (3) via a coupling. The buckle has two symmetrically distributed L-shaped frames (7) slidingly arranged on the top, a mounting frame (5) is fixed to the middle of the front upper end of the fixing frame (1), a plurality of guide rods (6) are installed on both left and right sides of the vertical portion of the mounting frame (5), a limiting mechanism (4) is fixed to the rear of the horizontal portions of the two L-shaped frames (7), a supporting welding mechanism (9) is fixed to the middle of the upper end of the fixing frame (1), and the lower portions of the two limiting mechanisms (4) are threadedly connected to the threaded rod (3).

2. The automatic pipeline welding device according to claim 1 is characterized in that: The limiting mechanism (4) comprises a hydraulic cylinder (41) fixed to the top of the horizontal part of the L-shaped frame (7) and two concave fixing blocks (46); the piston rod of the output end of the hydraulic cylinder (41) penetrates the L-shaped frame (7) and extends to the lower part; a connecting plate (42) is installed at the lower part of the piston rod of the hydraulic cylinder (41); a buffer mechanism (43) is fixed to the lower end of the piston rod of the hydraulic cylinder (41); the concave fixing block (46) located at the upper part is fixed to the lower part of the buffer mechanism (43); the concave fixing block (46) located at the lower part is fixed to the buckle on the same side and is threadedly connected to the threaded rod (3); the two concave fixing blocks (46) are fixed to the lower part of the buffer mechanism (43); The front and rear parts of the sides of the fixed blocks (46) close to each other are both provided with a rotating roller (49); the upper end of the concave fixed block (46) is provided with a scale (44) distributed front and rear; the front and rear parts of the side of the concave fixed block (46) close to the center of the fixed frame (1) are both threadedly connected with a limit rod (45); the front and rear parts of the side of the concave fixed block (46) close to the middle of the fixed frame (1) are both provided with a lower supporting block (48) matching the limit rod (45) on the same side; and the front parts of the two concave fixed blocks (46) on the same side are commonly provided with a driving part (47).

3. The automatic pipeline welding device according to claim 2 is characterized in that: The buffer mechanism (43) comprises a shell 1 (431), the inner cavity of the shell 1 (431) slides on the outer surface of the piston rod, the inner cavity of the shell 1 (431) is provided with a spring 1 (432), and the top of the spring 1 (432) is fixedly connected to the lower end of the piston rod.

4. The automatic pipeline welding device according to claim 2 is characterized in that: The driving part (47) comprises a rack (471) fixed to the front of the first connecting plate (42) and a second fixing frame (475) fixed to the buckle on the same side; the rack (471) is fixed with a driving plate (472) on both the front and rear sides; a gear (474) is rotatably mounted on the top of the second fixing frame (475); the rack (471) and the gear (474) are meshed with each other; a driving mechanism (473) is fixed to the gear (474) and the middle of the front and rear ends of the second fixing frame (475); an L-shaped plate (476) is fixed to the upper part of the front and rear ends of the second fixing frame (475); and a pushing mechanism (477) is fixed to the two L-shaped plates (476) on one side close to the concave fixing block (46).

5. The automatic pipeline welding device according to claim 4 is characterized in that: The pushing mechanism (477) comprises two limiting rings (4771), the inner cavities of the two limiting rings (4771) are jointly slid with a fixing rod (4773), the two sides of the fixing rod (4773) are respectively jointly fixed with a spring (4772) together with the limiting ring (4771) on the same side, a rubber driving wheel (4776) is fixed to the middle of the outer surface of the fixing rod (4773), the left and right sides of the outer surface of the fixing rod (4773) are both rotated with limiting rings (4774), two guide rods (4775) are fixed to the front of the outer surface of the two limiting rings (4774), the two guide rods (4775) on the same side are both slid on the outer surface of the L-shaped plate (476) on the same side, and the front parts of the two driving mechanisms (473) are both installed on the outermost side of the outer surface of the fixing rod (4773).

6. The automatic pipeline welding device according to claim 1 is characterized in that: The supporting welding mechanism (9) comprises a base (91) fixed at the middle of the top end of the fixing frame (1), the upper end of the base (91) is symmetrically provided with concave support blocks (92), the front and rear parts of the two concave support blocks (92) are both provided with rotating rollers (95), the middle rear side of the base (91) is fixed with a guide mechanism (93), and the upper part of the guide mechanism (93) is fixed with a swing structure (94).

7. The automatic pipeline welding device according to claim 6, characterized in that: The guide mechanism (93) comprises two fixed wheels (931), the two fixed wheels (931) are both rotated on the rear side of the upper end of the base (91), an extension rod 1 (933) is fixed to the front of the outer surface of the two fixed wheels (931), an extension rod 2 (935) is rotated on the upper part of the outer surface of the two fixed wheels (931), a spring 3 (936) is fixed between the outer surface of the extension rod 1 (933) and the outer surface of the extension rod 2 (935) on the same side, a counterweight block (932) is fixed to the front of the outer surface of the two fixed wheels (931), and a roller 3 (934) is rotated at the front end of the two extension rods 1 (933).

8. The automatic pipeline welding device according to claim 7, characterized in that: The swing structure (94) comprises two rubber driving wheels (941) respectively rotating on the front sides of the upper outer surfaces of the two extension rods (935) and two shaft rods (945) rotating on the rear sides of the upper outer surfaces of the two extension rods (935); a driving mechanism (942) is fixed between the shaft rods (945) and the rubber driving wheels (941) on the same side; a welding gun (943) is rotated on the upper ends of the two extension rods (935); and a swing mechanism (944) is fixed in the middle of the shaft rods (945).

9. The automatic pipeline welding device according to claim 8, characterized in that: The swing mechanism (944) comprises a mounting wheel (9441) fixed to the middle of the outer surface of the second shaft rod (945), two wavy rings (9442) are fixed to the outer surface of the mounting wheel (9441), a clamping plate (9444) is placed between the two wavy rings (9442), a fixing frame three (9443) is rotatably arranged in the middle of the outer surface of the clamping plate (9444), and the two ends of the fixing frame three (9443) are respectively fixed to the outer surfaces of the two extension rods (935).

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