An automatic pipe welding device

Abstract

The present invention discloses an automatic pipeline welding device, specifically relating to the technical field of pipeline welding. It includes a first fixing frame and a first motor. Two symmetrically distributed L-shaped frames slide on the top of the buckle. In the middle of the front side of the upper end of the first fixing frame, an installation frame is fixed. A plurality of first guide rods are installed on both the left and right sides of the vertical part of the installation frame. A limiting mechanism is fixed on the rear side of the horizontal part of each of the two L-shaped frames. A supporting welding mechanism is fixed in the middle of the upper end of the first fixing frame. The lower parts of the two limiting mechanisms are both threadedly connected to a threaded rod. For the automatic pipeline welding device of the present invention, after placing the metal pipeline on the supporting welding mechanism, under the action of the gravity of the metal pipeline, it can drive the guiding mechanism to drive the swinging structure to operate synchronously, automatically attaching the third roller to the outer surface of the metal pipeline, without the need to separately adjust the swinging structure, and also without the need for an additional welding robot. While improving the automation degree of the device, it can also reduce costs.

Description

Technical Field

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

[0002] A pipeline is a device formed by connecting pipes, pipe connectors, valves, etc. for transporting gases, liquids, or fluids 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 fields such as oil transportation, gas transportation, liquid transportation, and sample transportation, strict requirements are imposed on pipeline docking and welding 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 in ensuring positioning accuracy and welding quality.

[0004] Chinese Patent Document Publication No. 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 sliding seat, a sliding plate on the sliding seat, and a support plate; a positioning mechanism including a positioning plate, a rough positioning pin inserted on the positioning plate, a positioning cylinder provided on the outer end face of the positioning plate, and a fine positioning pin; a clamping mechanism including a clamping cylinder and jaws 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 the pipeline. The above patent document is an automatic pipeline welding device that can achieve rapid centering of the flange and the pipeline through double positioning, position the flange connection surface through a reference plane, and can achieve automatic welding;

[0005] However, the above patent document still has the following defects in the implementation process:

[0006] Although the above patent can fix the pipeline during the implementation process, a separate welding robot is still required to perform the welding operation during the subsequent welding process, increasing the production cost. Summary of the Invention

[0007] 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 still required to perform the welding operation during the subsequent welding process, increasing the production cost.

[0008] To achieve the above purpose, the technical solution adopted by the present invention is:

[0009] An automatic pipeline welding device, comprising a first fixing frame, a plurality of sliding rails, a threaded rod and a first motor. A plurality of the sliding rails are all fixed on the top of the first fixing frame. A plurality of buckles adapted to the sliding rails are slid on the tops of the plurality of sliding rails. The threaded rod is rotatably installed in the middle of the upper end of the first fixing frame. The first motor is installed on one side of the top of the first fixing frame, and its load end is fixedly connected to one end of the threaded rod through a coupling.

[0010] Two symmetrically distributed L-shaped frames are slid on the tops of the buckles. An installation frame is fixed in the middle of the front side of the upper end of the first fixing frame. A plurality of first guide rods are installed on both the left and right sides of the vertical part of the installation frame. Limiting mechanisms are fixed on the rear sides of the horizontal parts of the two L-shaped frames. A supporting welding mechanism is fixed in the middle of the upper end of the first fixing frame. The lower parts of the two limiting mechanisms are both threadedly connected to the threaded rod.

[0011] Preferably, the limiting mechanism includes a hydraulic cylinder and two concave fixing blocks fixed on the top of the horizontal part of the L-shaped frame. The output end piston rod of the hydraulic cylinder penetrates through the L-shaped frame and extends to the lower part. A first connecting plate is installed on the lower part of the piston rod of the hydraulic cylinder. A buffer mechanism is fixed at the lower end of the piston rod of the hydraulic cylinder. The upper concave fixing block is fixed at the lower part of the buffer mechanism. The lower concave fixing block is fixed on the same-side buckle and is threadedly connected to the threaded rod. A first roller is rotatably installed on both the front and rear sides of the mutually approaching sides of the two concave fixing blocks. Scales are fixedly installed on the front and rear distributions of the upper end of the upper concave fixing block. A first limiting rod is threadedly connected to both the front and rear sides of the upper concave fixing block close to the center of the first fixing frame. A lower supporting block matching the same-side first limiting rod is fixed on both the front and rear sides of the lower concave fixing block close to the middle of the first fixing frame. A driving part is jointly fixed on the front sides of the two concave fixing blocks on the same side.

[0012] Preferably, the buffer mechanism includes a first housing. The inner cavity of the first housing slides on the outer surface of the piston rod. A first spring is installed in the inner cavity of the first housing. The top of the first spring is fixedly connected to the lower end of the piston rod.

[0013] Preferably, the driving part includes a rack fixed to the front part of the first connecting plate and a second fixing frame fixed on the same-side buckle. Driving plates are fixed on both the front and rear sides of the rack. A gear is rotatably installed on the top of the second fixing frame. The rack meshes with the gear. Driving mechanisms are jointly fixed on the middle parts of the front and rear ends of the gear and the second fixing frame. L-shaped plates are fixed on the upper parts of the front and rear ends of the second fixing frame. A pushing mechanism is jointly fixed on the sides of the two L-shaped plates close to the concave fixing blocks.

[0014] Preferably, the pushing mechanism includes two limiting rings. A first fixing rod slides jointly in the inner cavities of the two limiting rings. On both sides of the first fixing rod, a second spring is fixedly connected to the limiting ring on the same side respectively. In the middle of the outer surface of the first fixing rod, a first rubber driving wheel is fixed. On the left and right sides of the outer surface of the first fixing rod, limiting rings are rotatably arranged. On the front part of the outer surface of each of the two limiting rings, two second guide rods are fixed. The two second guide rods on the same side slide on the outer surface of the L-shaped plate on the same side. The front parts of the two first driving mechanisms are both installed on the outermost side of the outer surface of the first fixing rod.

[0015] Preferably, the supporting and welding mechanism includes a base fixed in the middle of the top end of the first fixing frame. On the upper end of the base, concave supporting blocks are symmetrically installed on the left and right. On the front and rear parts of the two concave supporting blocks, second rollers are rotatably arranged. At the rear side of the middle of the base, a guiding mechanism is fixed. On the upper part of the guiding mechanism, a swinging structure is fixed.

[0016] Preferably, the guiding mechanism includes two fixing wheels. The two fixing wheels are rotatably arranged at the rear side of the upper end of the base. On the front part of the outer surface of each of the two fixing wheels, a first extension rod is fixed. On the upper part of the outer surface of each of the two fixing wheels, a second extension rod is rotatably arranged. Between the outer surfaces of the first extension rod and the second extension rod on the same side, a third spring is fixedly connected. On the front part of the outer surface of each of the two fixing wheels, a counterweight block is fixed. At the front end of each of the two first extension rods, a third roller is rotatably arranged.

[0017] Preferably, the swinging structure includes two second rubber driving wheels rotatably arranged on the front side of the upper part of the outer surface of each of the two second extension rods and a second shaft rod rotatably arranged on the rear side of the upper part of the outer surface of each of the two second extension rods. Between the second shaft rod and the second rubber driving wheel on the same side, a second driving mechanism is fixedly connected. At the upper ends of the two second extension rods, a welding torch is rotatably arranged jointly. In the middle of the second shaft rod, a swinging mechanism is fixed.

[0018] Preferably, the swinging mechanism includes a mounting wheel fixed on the middle of the outer surface of the second shaft rod. On the outer surface of the mounting wheel, two wavy rings are fixed. Between the two wavy rings, a clamping plate is placed. In the middle of the outer surface of the clamping plate, a third fixing frame is rotatably arranged. The two ends of the third fixing frame are respectively fixed on the outer surfaces of the two second extension rods.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, after the metal pipe is placed between the four first rollers, the metal pipe can be automatically fixed by starting the hydraulic cylinder. By means of the arranged buffer mechanism, the first limiting rod, the lower supporting block, etc., the integrity of the metal pipe can also be protected during the process of fixing the metal pipe, and over-clamping can be prevented.

[0021] 2. In the present invention, by adjusting the position of the first limiting rod, the four first rollers can be applicable to metal pipes of various sizes, improving the clamping range.

[0022] 3. In the present invention, the clamping process and the driving process are linked. After the four first rollers fix the metal pipe, the continued operation of the hydraulic cylinder can drive the driving part to operate and then drive the metal pipe to rotate. No additional power source is required, improving the energy utilization rate and reducing energy waste.

[0023] 4. In the present invention, after the metal pipe is placed on the supporting and welding mechanism, under the action of the gravity of the metal pipe, the guiding mechanism can be driven to drive the swinging structure to operate synchronously, and the third roller can be automatically attached to the outer surface of the metal pipe. There is no need to separately adjust the swinging structure, and no additional welding robot is required. While improving the automation degree of the device, the cost can be reduced.

[0024] 5. In the present invention, through the mutual cooperation between the provided wavy ring and the clamping plate, etc., the overall clamping plate can be driven to swing during the rotation of the metal pipe. Finally, the third roller swings during the welding of the two metal pipes, automatically welding the metal pipe, making the welding track in a "zigzag" shape, improving the welding area and welding strength.

[0025] 6. In the present invention, the power source for the overall swing of the clamping plate also comes from the power generated during the rotation of the metal pipe, and no additional power source is required, further improving the energy utilization rate and reducing energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the overall structural schematic diagram of the present invention after loading the metal pipe;

[0027] Figure 2 is the schematic diagram of another perspective of the overall structure of the present invention after loading the metal pipe;

[0028] Figure 3 is the overall structural schematic diagram of the present invention without loading the metal pipe;

[0029] Figure 4 is the overall structural schematic diagram of the limiting mechanism of the present invention;

[0030] Figure 5 is the schematic diagram of another perspective of the overall structure of the limiting mechanism of the present invention;

[0031] Figure 6 is the Figure 5 enlarged schematic diagram at C in the present invention;

[0032] Figure 7 is the Figure 5 enlarged schematic diagram at A in the present invention;

[0033] Figure 8 For the present invention Figure 7 Enlarged schematic view at position B in

[0034] Figure 9 Overall structural schematic diagram of the supporting welding mechanism of the present invention

[0035] Figure 10 Overall structural schematic diagram of the guiding mechanism and the swinging structure of the present invention

[0036] Figure 11 For the present invention Figure 10 Enlarged schematic view at position D in

[0037] In the figure: 1. First fixed frame; 2. Slide rail; 3. Threaded rod; 4. Limiting mechanism; 41. Hydraulic cylinder; 42. First connecting plate; 43. Buffer mechanism; 431. First housing; 432. First spring; 44. Scale; 45. First limiting rod; 46. Concave fixing block; 47. Driving part; 471. Rack; 472. Driving plate; 473. First driving mechanism; 474. Gear; 475. Second fixed frame; 476. L-shaped plate; 477. Pushing mechanism; 4771. Limiting ring; 4772. Second spring; 4773. First fixed rod; 4774. Limiting circular ring; 4775. Second guiding rod; 4776. First rubber driving wheel; 48. Lower supporting block; 49. First roller; 5. Mounting frame; 6. First guiding rod; 7. L-shaped frame; 8. First motor; 9. Supporting welding mechanism; 91. Base; 92. Concave supporting block; 93. Guiding mechanism; 931. Fixed wheel; 932. Counterweight; 933. First extension rod; 934. Third roller; 935. Second extension rod; 936. Third spring; 94. Swinging structure; 941. Second rubber driving wheel; 942. Second driving mechanism; 943. Welding torch; 944. Swinging mechanism; 9441. Mounting wheel; 9442. Wavy ring; 9443. Third fixed frame; 9444. Clamp; 945. Second shaft rod; 95. Second roller; 10. Metal pipe. Detailed implementation manners

[0038] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with the detailed implementation manners.

[0039] Example 1, as shown in Figure 1 、 Figure 2 and Figure 3As shown in the figure, an automatic pipe welding device includes a first fixing frame 1, a plurality of slide rails 2, a threaded rod 3, and a first motor 8. The plurality of slide rails 2 are all fixed to the top of the first fixing frame 1. A plurality of buckles adapted to the slide rails 2 are slidably arranged on the tops of the plurality of slide rails 2. The threaded rod 3 is rotatably installed in the middle of the upper end of the first fixing frame 1. The first motor 8 is installed on one side of the top of the first fixing frame 1, and its load end is fixedly connected to one end of the threaded rod 3 through a coupling.

[0040] Two symmetrically distributed L-shaped frames 7 are slidably arranged on the tops of the buckles. An installation frame 5 is fixed in the middle of the front side of the upper end of the first fixing frame 1. A plurality of first guide rods 6 are installed on both the left and right sides of the vertical part of the installation frame 5. Limiting mechanisms 4 are fixed to the rear sides of the horizontal parts of the two L-shaped frames 7. A supporting welding mechanism 9 is fixed in the middle of the upper end of the first fixing frame 1. The lower parts of the two limiting mechanisms 4 are both threadedly connected to the threaded rod 3.

[0041] In this case, the lengths of the first fixing frame 1, the plurality of slide rails 2, the threaded rod 3, and the plurality of first guide rods 6 can be extended or shortened according to specific implementation scenarios.

[0042] The plurality of first guide rods 6 mentioned above are all slidably arranged on the installation frame 5. The installation frame 5 guides the plurality of first guide rods 6, enabling the first guide rods 6 to only move horizontally. The installation frame 5 shown in the figure is only one implementation manner in this embodiment. As long as other implementation manners meet the above technical effects and do not affect the operation of structures such as the L-shaped frame 7, they are all acceptable.

[0043] Before the implementation of this embodiment, the distance between the two L-shaped frames 7 is first adjusted to the center of gravity position of the metal pipe 10 according to the diameter of the metal pipe 10, preventing the phenomenon that the contact surfaces are warped after placing the two metal pipes 10 inside the limiting mechanisms 4 and the supporting welding mechanism 9, making the contact surfaces of the two metal pipes 10 flat and improving the contact quality.

[0044] During the implementation of this embodiment, according to the length of the metal pipe 10, the distance between the two L-shaped frames 7 and the two limiting mechanisms 4 is adjusted through the first motor 8 and the threaded rod 3, etc. Subsequently, the two metal pipes 10 are respectively placed on the two limiting mechanisms 4, 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. Then, the limiting mechanisms 4 are activated to fix the metal pipes 10. After fixation, the limiting mechanisms 4 continue to operate to drive the two metal pipes 10 to rotate, and then drive the supporting welding mechanism 9 to operate to weld the contact surfaces of the two metal pipes 10.

[0045] Specifically, in order to achieve the purpose of fixing the metal pipe 10 before welding as mentioned above, refer to Figure 4 and Figure 5, in this embodiment, the limiting mechanism 4 includes 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 output end piston rod of the hydraulic cylinder 41 penetrates through the L-shaped frame 7 and extends to the lower part. A connecting plate one 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 upper concave fixing block 46 is fixed to the lower part of the buffer mechanism 43. The lower concave fixing block 46 is fixed to the buckle on the same side and is threadedly connected to the threaded rod 3. Roller one 49 is rotatably installed at the front and rear of the side of the two concave fixing blocks 46 close to each other. Scale 44 is fixedly installed at the front and rear of the upper end of the upper concave fixing block 46. Limiting rod one 45 is threadedly connected to the front and rear sides of the side of the upper concave fixing block 46 close to the center of the fixing frame one 1. Lower supporting block 48 matching the limiting rod one 45 on the same side is fixedly installed at the front and rear of the side of the lower concave fixing block 46 close to the middle of the fixing frame one 1;

[0046] Before implementation, first, rotate and adjust the height of the lower ends of the two limiting rods one 45 on the same side according to the diameter of the metal pipe 10, so that after the two limiting rods one 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 roller ones 49 can be suitable for the current metal pipe 10, preventing the metal pipe 10 from being deformed due to excessive extrusion, and further damaging the metal pipe 10.

[0047] In the implementation process of this embodiment, the center of gravity position of the metal pipe 10 is placed on the two roller ones 49 at the lower part, and the position to be welded is placed at the supporting and welding mechanism 9. The hydraulic cylinder 41 is started, so that the hydraulic cylinder 41 drives the connecting plate one 42, the buffer mechanism 43 and the upper concave fixing block 46, etc. to move downward synchronously. The metal pipe 10 is squeezed and fixed by the two roller ones 49 at the upper part and the two roller ones 49 at the lower part. At this time, the two concave fixing blocks 46 will not approach further. 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 to rotate by the driving part 47, facilitating the subsequent welding operation of the metal pipe 10.

[0048] Specifically, in order to achieve the purpose of buffering the moving length of the piston rod of the hydraulic cylinder 41 in the above, refer to Figure 5 and Figure 6 , in this embodiment, the buffer mechanism 43 includes a housing one 431. The inner cavity of the housing one 431 slides on the outer surface of the piston rod. A spring one 432 is installed in the inner cavity of the housing one 431. The top of the spring one 432 is fixedly connected to the lower end of the piston rod;

[0049] The lower end of the outer shell 431 mentioned above is fixedly connected to the middle part of the concave fixing block 46 located in the upper part. When the piston rod of the hydraulic cylinder 41 continues to move after stopping at the concave fixing block 46 located in the upper part, the piston rod can squeeze the first spring 432, and the first spring 432 deforms during this process to buffer the displacement generated during the downward movement of the piston rod.

[0050] Specifically, in order to achieve the purpose of driving the metal pipe 10 to rotate after fixing the metal pipe 10 mentioned above, refer to Figure 7 and Figure 8 In this embodiment, a driving part 47 is fixedly arranged on the front sides of two concave fixing blocks 46 on the same side. The driving part 47 includes a rack 471 fixedly connected to the front part of the first connecting plate 42 and a second fixing frame 475 fixed on the buckle on the same side. Driving plates 472 are fixedly arranged on both the front and rear sides of the rack 471. A gear 474 is rotatably arranged on the top of the second fixing frame 475. The rack 471 meshes with the gear 474. Driving mechanisms 473 are fixedly arranged in the middle of the front and rear ends of the gear 474 and the second fixing frame 475 respectively. L-shaped plates 476 are fixedly arranged on the upper parts of the front and rear ends of the second fixing frame 475. A pushing mechanism 477 is fixedly arranged on the side of the two L-shaped plates 476 close to the concave fixing block 46.

[0051] From Figure 7 it can be seen that the lower parts of the two driving plates 472 mentioned above are inclined planes on the side close to the first roller 49, which can facilitate driving the first fixing rod 4773 to approach the first roller 49.

[0052] Furthermore, refer to Figure 8 In this embodiment, the pushing mechanism 477 includes two limiting rings 4771. A first fixing rod 4773 is slidably arranged in the inner cavities of the two limiting rings 4771. Second springs 4772 are fixedly arranged between the two sides of the first fixing rod 4773 and the limiting rings 4771 on the same side respectively. A first rubber driving wheel 4776 is fixedly arranged in the middle of the outer surface of the first fixing rod 4773. Limiting rings 4774 are rotatably arranged on the left and right sides of the outer surface of the first fixing rod 4773. Two guiding rods 4775 are fixedly arranged on the front parts of the outer surfaces of the two limiting rings 4774. The two guiding rods 4775 on the same side are slidably arranged on the outer surface of the L-shaped plate 476 on the same side. The front parts of the two driving mechanisms 473 are arranged on the outermost side of the outer surface of the first fixing rod 4773.

[0053] Since the outer side of the first rubber driving wheel 4776 mentioned above is made of rubber material, it can deform during its implementation, and then the contact area between the first rubber driving wheel 4776 and the metal pipe 10 can be increased, improving the driving effect.

[0054] From Figure 7It can be known that the two driving mechanisms 473 above are each composed of two first pulleys, a tension pulley, a first transmission belt, and two first shafts. The first transmission belt is sleeved on the outer surfaces of the two first pulleys and the outer surface of the tension pulley. The two first shafts are respectively fixedly installed on the axles of the upper first pulleys and rotatably installed on the axles of the middle tension pulleys. The upper tension pulley is fixedly connected to the axle center of the gear 474. The first shaft in the middle is slidably connected to the second fixing frame 475, and a fourth spring is provided between the first shaft in the middle and the second fixing frame 475, thereby playing the role of the tension pulley tightening the first transmission belt;

[0055] It can be known from Figure 8 that the lower first pulley is fixed on the outside of the first fixing rod 4773 and is used to drive the first fixing rod 4773 to rotate.

[0056] In the above, after the four first rollers 49 fix the metal pipe 10, the piston rod of the hydraulic cylinder 41 continues to move downward. During this process, the first 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 first fixing rod 4773 can be driven to rotate through the first shaft, the two first pulleys, the tension pulley, the first transmission belt, etc., and finally the first rubber driving wheel 4776 is driven to rotate synchronously;

[0057] When the two driving plates 472 are respectively in contact with the same-side limiting rings 4774, during the process of the driving plates 472 continuing to move downward, the first rubber driving wheel 4776 can be driven to move closer to the direction of the first rollers 49 under the guidance of the limiting ring 4771, etc. Finally, the first rubber driving wheel 4776 is tightly attached to the outer surface of the metal pipe 10, and then the first rubber driving wheel 4776 can be used to drive the metal pipe 10 to rotate, facilitating subsequent welding operations and performing full welding on the welds;

[0058] In addition, the second guiding rod 4775 can limit the limiting ring 4774 to prevent it from rotating synchronously with the first fixing rod 4773;

[0059] When the welding is completed, the driving plate 472 is separated from the limiting ring 4774, and under the action of the second spring 4772, etc., the first rubber driving wheel 4776 can be driven to be separated from the metal pipe 10 and finally return to the initial position.

[0060] Embodiment 2. On the basis of Embodiment 1, this embodiment supports the position of the metal pipe 10 that needs to be welded and performs welding operations on the two metal pipes 10.

[0061] To achieve the above purpose, refer to Figure 9, in this embodiment, the supporting and welding mechanism 9 includes a base 91 fixed to the middle of the top end of the first fixing frame 1. Concave supporting blocks 92 are symmetrically installed on the left and right sides of the upper end of the base 91. Rollers II 95 are rotatably installed at the front and rear of the two concave supporting blocks 92. A guiding mechanism 93 is fixed to the rear side of the middle of the base 91, and a swinging structure 94 is fixed to the upper part of the guiding mechanism 93;

[0062] Further, referring to Figure 10 , in this embodiment, the guiding mechanism 93 includes two fixed wheels 931, both of which are rotatably installed on the rear side of the upper end of the base 91. Extension rods I 933 are fixed to the front of the outer surfaces of the two fixed wheels 931. Extension rods II 935 are rotatably installed on the upper parts of the outer surfaces of the two fixed wheels 931. A spring III 936 is jointly fixed between the outer surfaces of the extension rods I 933 and the extension rods II 935 on the same side. Counterweight blocks 932 are fixed to the front of the outer surfaces of the two fixed wheels 931. Rollers III 934 are rotatably installed at the front ends of the two extension rods I 933;

[0063] First, when the metal pipe 10 is not placed on the four rollers II 95, the extension rod I 933 is in an inclined state, and the horizontal height of the roller III 934 is greater than the horizontal height of the counterweight block 932;

[0064] After the metal pipe 10 is placed on the four rollers II 95, under the extrusion of the metal pipe 10, the extension rod I 933 is also in an inclined state. At this time, the horizontal height of the counterweight block 932 is greater than the horizontal height of the roller III 934. At the same time, under the extrusion of the metal pipe 10, the angle between the extension rod II 935 and the extension rod I 933 increases, so that the swinging structure 94 closely adheres to the outer surface of the metal pipe 10.

[0065] In this case, the counterweight block 932 is set to change the initial inclined state of the extension rod I 933 to prevent the metal pipe 10 from causing extrusion damage to the swinging structure 94 during the process of placing the metal pipe 10.

[0066] Specifically, in order to facilitate the welding of the two metal pipes 10, referring to Figure 10 and Figure 11 , in this embodiment, the swinging structure 94 includes two rubber driving wheels II 941 respectively rotatably installed on the front sides of the upper parts of the outer surfaces of the two extension rods II 935 and a shaft rod II 945 rotatably installed on the rear sides of the upper parts of the outer surfaces of the two extension rods II 935. A driving mechanism II 942 is jointly fixed between the shaft rod II 945 and the rubber driving wheel II 941 on the same side. A welding torch 943 is jointly rotatably installed at the upper ends of the two extension rods II 935. A swinging mechanism 944 is fixed to the middle of the shaft rod II 945;

[0067] The welding torch 943 in the above rotates on the two second extension rods 935, and its rotation direction is horizontal rotation. During implementation, a clamp in the prior art can be used to rotatably mount the welding torch 943 on the two second extension rods 935. In this way, it is convenient to disassemble, repair, and replace the welding torch 943.

[0068] The second driving mechanism 942 in the above is similar to the first driving mechanism 473 in principle. The second driving mechanism 942 in this case is jointly composed of a third shaft rod, two second belt pulleys, and a second transmission belt. The second transmission belt is sleeved on the outer surfaces of the two second belt pulleys. The third shaft rod is fixed on the axis of the rubber driving wheel 941. One of the second belt pulleys is fixed on the shaft rod, and the other second belt pulley is fixed on the axis of the second shaft rod 945. Thus, the power on the rubber driving wheel 941 can be transmitted to the second shaft rod 945.

[0069] Further, referring to Figure 11 , in this embodiment, the swinging mechanism 944 includes a mounting wheel 9441 fixed in the middle of the outer surface of the second shaft rod 945. Two wavy rings 9442 are fixed on the outer surface of the mounting wheel 9441. A clamping plate 9444 is placed between the two wavy rings 9442. A third fixing frame 9443 rotates in the middle of the outer surface of the clamping plate 9444. The two ends of the third fixing frame 9443 are respectively fixed on the outer surfaces of the two second extension rods 935.

[0070] From Figure 11 , it can be seen that the middle part of the third fixing frame 9443 is hollow. The middle part of the clamping plate 9444 rotates at the cavity position of the third fixing frame 9443. The clamping plate 9444 can swing left and right in the vertical direction.

[0071] In addition, the top of the clamping plate 9444 is concave, and the bottom of the clamping plate 9444 is spherical. The third roller 934 is placed in this concave part. When the clamping plate 9444 swings, it can drive the third roller 934 to swing synchronously. The spherical ball at the bottom of the clamping plate 9444 can facilitate the clamping plate 9444 to move between the two wavy rings 9442.

[0072] During the rotation of the second shaft rod 945, it can drive the mounting wheel 9441 to rotate synchronously, and then drive the two wavy rings 9442 to rotate synchronously. Through the wavy bending track between the two wavy rings 9442 and the cooperation with the spherical ball at the bottom of the clamping plate 9444, the overall swinging of the clamping plate 9444 can be driven. Finally, the third roller 934 swings during the welding of the two metal pipes 10, making the welding track in a zigzag shape, achieving the effect of "fish scale welding" in the industry, and improving the welding area and welding strength.

[0073] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended 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 at 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 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); 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 to 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); 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; The driving part (47) comprises a rack (471) fixed to the front of the connecting plate 1 (42) and a fixing frame 2 (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 fixing frame 2 (475), the rack (471) and the gear (474) are meshed with each other, a driving mechanism 1 (473) is fixed to the gear (474) and the middle of the front and rear ends of the fixing frame 2 (475), an L-shaped plate (476) is fixed to the upper part of the front and rear ends of the fixing frame 2 (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); 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).

2. 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).

3. The automatic pipeline welding device according to claim 2 is 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).

4. The automatic pipeline welding device according to claim 3 is 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).

5. The automatic pipeline welding device according to claim 4 is 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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