Metal pipeline welding device for water conservancy construction

Abstract

This invention belongs to the field of pipeline welding and provides a metal pipeline welding device for hydraulic construction. The device includes a welding table with multiple fixed placement components and multiple adjustable placement components mounted on it. These components are located on opposite sides of the welding table and are used to place pipelines. The adjustable placement components can also move the pipelines up and down. A drive mechanism and a detection mechanism are also mounted on the welding table, with the drive mechanism located between the fixed placement components. Before welding, this invention uses the detection mechanism to check the alignment of the two pipeline axes and the adjustable placement components to adjust the positions of the pipelines, ensuring that the axes of the two pipelines ultimately coincide. This eliminates deviations caused by manufacturing tolerances and improves the quality of pipeline welding.

Description

Technical Field

[0001] This invention belongs to the field of pipeline welding, and particularly relates to a metal pipeline welding device for water conservancy construction. Background Technology

[0002] Water conservancy engineering refers to the engineering field of planning, designing, constructing, and managing water resources. It involves the development, utilization, protection, and management of water resources. Water conservancy projects utilize various engineering methods, such as reservoirs and irrigation canals, to develop water resources, improve water utilization efficiency, and meet the needs of agriculture, industry, and domestic water use. Metal pipelines are needed in water conservancy projects to transport water resources. Welding equipment is required to connect these metal pipelines.

[0003] However, when welding existing water conservancy construction pipelines, the two pipelines are usually brought close together and aligned manually. Workers use tools or their eyes to judge whether the pipelines are aligned, but small deviations are difficult to see clearly, so there will still be some errors at the interface of the two water conservancy construction pipelines, which can easily lead to gaps at the weld during welding.

[0004] In response to the aforementioned technical problems, the applicant found some existing technologies, such as Chinese Patent Publication No. CN118417755B, which describes a welding device for water conservancy construction pipelines. This device uses two pipe clamp components with coincident axes to position two pipes so that the axes of the two pipes coincide.

[0005] However, even pipes of the same specification have permissible manufacturing tolerances for their outer diameter. If the outer diameters of two pipes are at the upper and lower limits of the tolerance range, they will have different "clearances" in the pipe clamp components, which may lead to misalignment of the axes and reduce the quality of pipe welding. Summary of the Invention

[0006] The purpose of this invention is to provide a metal pipe welding device for water conservancy construction, which aims to solve the technical problem of misalignment of the axes caused by manufacturing tolerances in the outer diameter of pipes of the same specification in the prior art.

[0007] The present invention is implemented as follows: a metal pipe welding device for water conservancy construction includes a welding table, on which a plurality of fixed placement components and a plurality of adjustable placement components are installed. The plurality of fixed placement components and the plurality of adjustable placement components are respectively located on both sides of the welding table. The plurality of fixed placement components and the plurality of adjustable placement components are used to place pipes, and the adjustable placement components can also drive the pipes to move up and down so that the ends of the two pipes are aligned.

[0008] The welding table is also equipped with a drive mechanism and a detection mechanism. The drive mechanism is located among multiple fixed placement components. The drive mechanism is used to drive the pipe to rotate. The detection mechanism is used to detect whether the axes of the two pipes coincide and to provide feedback to the operator. The operator can adjust the position of the pipes through the adjustable placement components until the axes of the two pipes coincide.

[0009] The welding platform is also equipped with a welding assembly located on the side of the pipe. The output end of the welding assembly is located above the joint end of the two pipes. The welding assembly is used to weld the two pipes together.

[0010] A further technical solution: The fixed placement assembly includes a placement frame, which is fixedly mounted on a welding table, and two first transmission rollers are rotatably mounted on the top of the placement frame.

[0011] Further technical solution: The adjustable placement component includes a second fixed cylinder, which is fixedly installed on the welding table. A lifting frame is slidably installed inside the second fixed cylinder. Two second transmission rollers are rotatably installed on the top of the lifting frame. A screw is rotatably installed inside the second fixed cylinder. One end of the screw is threadedly connected to the lifting frame. A third servo motor is also installed on the welding table. A transmission rod is fixedly connected to the output shaft of the third servo motor. A transmission pair is connected between the end of the transmission rod that extends into the second fixed cylinder and the screw.

[0012] Further technical solution: The driving mechanism includes a first fixed cylinder fixedly installed on the welding table, a lifting seat slidably installed inside the first fixed cylinder, a return spring connected between the lifting seat and the first fixed cylinder, a first arc-shaped track fixedly installed on the lifting seat, a rotating ring slidably installed on the first arc-shaped track, and a plurality of evenly arranged first telescopic rods installed on the inner side wall of the rotating ring, with clamps fixedly installed at the movable ends of the plurality of first telescopic rods.

[0013] The driving mechanism further includes a first power component, which is mounted on the lifting seat. The output end of the first power component is connected to the rotating ring for transmission. The first power component is used to drive the rotating ring to slide along the first arc-shaped track.

[0014] Further technical solution: The first power component includes a gear ring and a first servo motor. The gear ring is mounted on a rotating ring, and the first servo motor is fixedly mounted on a lifting seat. The output shaft of the first servo motor is fixedly connected to a first gear, and the first gear meshes with the gear ring.

[0015] Further technical solution: The driving mechanism also includes a second telescopic rod, the movable end of which is fixedly mounted with an electromagnet via a connecting rod, and the side of the lifting seat is embedded with an iron plate adapted to the electromagnet.

[0016] Further technical solution: The detection mechanism includes two linear tracks, both of which are fixedly installed on the welding table. The two linear tracks are respectively set on both sides of the pipe. Sliding cylinders are slidably installed on both linear tracks. Lifting rods are slidably installed at the top of both sliding cylinders. A second arc-shaped track is fixedly installed between the two lifting rods. A slide frame is slidably installed on the second arc-shaped track. A housing is fixedly installed at the bottom of the slide frame. A data processing module and a feedback module are provided inside the housing. Two laser rangefinders are installed at the bottom of the housing. Both laser rangefinders are electrically connected to the data processing module.

[0017] The detection mechanism also includes a second power component, which is mounted on the slide and is used to drive the slide to slide along the second arc-shaped track.

[0018] The detection mechanism also includes a second servo motor, which is mounted on a welding table. The output shaft of the second servo motor is fixedly connected to a lead screw, which is threadedly connected to a slide cylinder.

[0019] The detection mechanism also includes a synchronization structure, which is installed between the lifting rod and the lifting seat. The synchronization structure is used to make the lifting rod and the lifting seat move synchronously, and the axis of the second arc-shaped track coincides with the axis of the rotating ring.

[0020] Further technical solution: The second power component includes a fourth servo motor and an internal gear plate. The fourth servo motor is mounted on the slide, and the internal gear plate is fixedly mounted on the second arc-shaped track. The axis of the internal gear plate coincides with the axis of the second arc-shaped track. The output shaft of the fourth servo motor is fixedly mounted with a second gear, and the second gear and the internal gear plate are meshed together.

[0021] A further technical solution: The synchronization structure includes a guide rod and a guide cylinder. The guide rod is fixedly connected to the lifting rod, and the guide cylinder is fixedly connected to the lifting seat. The guide rod and the guide cylinder are slidably installed.

[0022] A further technical solution: The welding assembly includes a mounting frame, which is fixedly mounted on the welding table. A third telescopic rod is fixedly mounted on the mounting frame. A mounting plate is fixedly connected to the movable end of the third telescopic rod. A welding torch is mounted on the mounting plate. The welding torch is connected to the main body of the welding machine.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. In this invention, before welding, the axial alignment of two pipes is detected by a testing mechanism, and the position of the pipes is adjusted by an adjustable placement component to make the axial alignment of the two pipes finally coincide, eliminating the phenomenon of deviation between the two pipes due to manufacturing tolerances and improving the quality of pipe welding.

[0025] 2. In this invention, by setting a reset spring, a lifting seat, and a first fixed cylinder, when welding pipes of different specifications (diameters), when the pipe is placed on the fixed placement assembly, the first telescopic rod will press against the pipe surface through the clamping plate. Under the reaction force, the rotating ring is lifted until multiple clamping plates are in contact with the pipe surface, and then the axis of the pipe and the axis of the rotating ring coincide. During this process, due to the presence of the reset spring, the rotating ring will drive the lifting seat to rise and fall, so that the rotating ring adapts to the specifications of the pipe, thus solving the problem of complex calculation of the pipe axis height.

[0026] 3. In this invention, by setting a second telescopic rod, an electromagnet, and an iron plate adapted to the electromagnet, after the pipe is clamped by multiple clamping plates, the power supply of the electromagnet is turned on, and the electromagnet attracts the iron plate on the side of the lifting seat, thereby fixing the lifting seat and preventing the rotating ring from causing the pipe to vibrate, thus improving the welding quality.

[0027] 4. In this invention, by setting guide rods and guide cylinders, the lifting rod and the lifting seat are relatively fixed. After the lifting seat is fixed to the pipeline, the lifting rod will also drive the second arc-shaped track to rise and fall with the rotating ring, so that the axis of the second arc-shaped track coincides with the axis of the pipeline on the fixed placement component. This allows the detection mechanism to perform coaxiality detection based on a pipeline. At the same time, it also eliminates the complex calculation steps required to adjust the height of the detection mechanism, making the operation of the device simpler. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 In this invention Figure 1 Enlarged diagram of point B in the middle.

[0030] Figure 3 This is a schematic diagram of the cross-sectional structure of the driving mechanism in this invention.

[0031] Figure 4 This is a schematic diagram of the detection mechanism in this invention.

[0032] Figure 5 In this invention Figure 1 Enlarged diagram of point A in the middle.

[0033] In the attached diagram: 1. Welding table; 2. Fixed placement assembly; 21. Placement frame; 22. First transmission roller; 3. Drive mechanism; 31. First telescopic rod; 32. Clamping plate; 33. Rotating ring; 34. Gear ring; 35. First arc-shaped track; 36. First gear; 37. Lifting seat; 38. First servo motor; 39. First fixed cylinder; 310. Return spring; 311. Iron plate; 312. Electromagnet; 313. Second telescopic rod; 4. Detection mechanism; 41. Second arc-shaped track; 42. Second gear; 43. Slide carriage; 44. 45. Housing; 46. Laser rangefinder; 47. Internal gear plate; 48. Lifting rod; 49. Guide rod; 40. Guide cylinder; 410. Linear track; 411. Lead screw; 412. Slide cylinder; 413. Second servo motor; 5. Pipe; 6. Adjustable placement assembly; 61. Second transmission roller; 62. Lifting frame; 63. Second fixed cylinder; 64. Screw; 65. Transmission pair; 66. Transmission rod; 67. Third servo motor; 78. Welding assembly; 79. Mounting bracket; 70. Third telescopic rod; 71. Mounting plate; 72. Welding torch. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0035] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0036] like Figures 1-5 As shown, this invention provides a metal pipe welding device for water conservancy construction, including a welding table 1. The welding table 1 is equipped with a plurality of fixed placement components 2 and a plurality of adjustable placement components 6. The plurality of fixed placement components 2 and the plurality of adjustable placement components 6 are respectively located on both sides of the welding table 1. The plurality of fixed placement components 2 and the plurality of adjustable placement components 6 are used to place pipes 5, and the adjustable placement components 6 can also drive the pipes 5 to move up and down so that the ends of the two pipes 5 are aligned.

[0037] The welding table 1 is also equipped with a drive mechanism 3 and a detection mechanism 4. The drive mechanism 3 is located between multiple fixed placement components 2. The drive mechanism 3 is used to drive the pipe 5 to rotate. The detection mechanism 4 is used to detect whether the axes of the two pipes 5 coincide and to provide feedback to the staff. The staff can adjust the position of the pipe 5 through the adjustable placement component 6 until the axes of the two pipes 5 coincide.

[0038] The welding station 1 is also equipped with a welding assembly 7, which is located on the side of the pipe 5. The output end of the welding assembly 7 is located above the joint end of the two pipes 5. The welding assembly 7 is used to weld the two pipes 5 together.

[0039] Before welding, the invention first uses a detection mechanism 4 to detect the alignment of the axes of the two pipes 5, and then uses an adjustable placement component 6 to adjust the position of the pipes 5 so that the axes of the two pipes 5 finally coincide, eliminating the phenomenon of deviation between the two pipes 5 due to manufacturing tolerances and improving the welding quality of the pipes 5.

[0040] The present invention provides a welding device for metal pipes 5 used in water conservancy construction. In this embodiment, the fixed placement component 2 includes a placement frame 21, which is fixedly installed on the welding table 1. Two first transmission rollers 22 are rotatably installed on the top of the placement frame 21.

[0041] Specifically, if the distance between the axes of the two first drive rollers 22 is less than the diameter of the pipe 5, the pipe 5 can be stably placed between the two first drive rollers 22.

[0042] The multiple fixed components 2 are distributed at equal intervals, so that the pipe 5 is subjected to force at multiple points and the force is balanced, thus preventing the pipe 5 from sagging or bending.

[0043] The present invention provides a welding device for metal pipes 5 used in water conservancy construction. In this embodiment, the adjustable placement component 6 includes a second fixed cylinder 63, which is fixedly installed on the welding table 1. A lifting frame 62 is slidably installed inside the second fixed cylinder 63. Two second transmission rollers 61 are rotatably installed on the top of the lifting frame 62. A screw 64 is rotatably installed inside the second fixed cylinder 63. One end of the screw 64 is threadedly connected to the lifting frame 62. A third servo motor 67 is also installed on the welding table 1. A transmission rod 66 is fixedly connected to the output shaft of the third servo motor 67. A transmission pair 65 is connected between one end of the transmission rod 66 that extends into the second fixed cylinder 63 and the screw 64.

[0044] Specifically, transmission pair 65 is a bevel gear pair.

[0045] Multiple adjustable placement components are equidistantly distributed.

[0046] During adjustment, the third servo motor 67 drives the transmission rod 66 to rotate, and the transmission rod 66 drives the screw 64 to rotate through the transmission pair 65. The screw 64 drives the lifting frame 62 to rise and fall.

[0047] In addition, to reduce costs, multiple transmission rods 66 can be connected end to end, and a third servo motor 67 can be retained. This allows the third servo motor 67 to drive all the lifting frames 62 to lift synchronously through the transmission rods 66. This not only reduces costs but also keeps the pipe 5 in a horizontal position, preventing the pipe 5 from tilting due to different lifting distances of multiple adjustable placement components 6.

[0048] The present invention provides a welding device for metal pipes 5 used in water conservancy construction. In this embodiment, the driving mechanism 3 includes a first fixed cylinder 39 fixedly installed on the welding table 1. A lifting seat 37 is slidably installed inside the first fixed cylinder 39. A return spring 310 is connected between the lifting seat 37 and the first fixed cylinder 39. A first arc-shaped track 35 is fixedly installed on the lifting seat 37. A rotating ring 33 is slidably installed on the first arc-shaped track 35. A plurality of evenly arranged first telescopic rods 31 are installed on the inner side wall of the rotating ring 33. A clamping plate 32 is fixedly installed on the movable end of each of the plurality of first telescopic rods 31.

[0049] The drive mechanism 3 also includes a first power component, which is mounted on the lifting seat 37. The output end of the first power component is connected to the rotating ring 33 for transmission. The first power component is used to drive the rotating ring 33 to slide along the first arc track 35.

[0050] Specifically, the clamp 32 is made of an elastic material, which allows the clamp 32 to adapt to pipes 5 of different diameters.

[0051] When installing pipe 5, pipe 5 is placed on the first transmission roller 22 and passes through multiple clamping plates 32. Then, the first telescopic rod 31 drives the clamping plates 32 to clamp pipe 5. When multiple clamping plates 32 are in contact with pipe 5, the axis of pipe 5 and the axis of rotating ring 33 coincide. Then, the first power assembly drives the rotating ring 33 to rotate. The rotating ring 33 drives pipe 5 to rotate through the first telescopic rod 31 and clamping plates 32 so as to perform circumferential welding on pipe 5.

[0052] It is worth noting that before driving the pipe 5 to rotate, the interface of the two pipes 5 needs to be spot welded by the welding assembly 7 to fix the two pipes 5 together. When driving one pipe 5 to rotate, the other pipe 5 will also rotate synchronously, so that the two pipes 5 can be welded in a circle.

[0053] When welding pipes 5 of different specifications (diameters), when the pipes 5 are placed on the fixed placement assembly 2, the height of the axis of the pipes 5 from the surface of the welding table 1 will be different. At this time, when clamping the pipes 5, the first telescopic rod 31 will press against the surface of the pipes 5 through the clamping plate 32. Under the reaction force, the rotating ring 33 is lifted until all the clamping plates 32 are in contact with the surface of the pipes 5. Then the axis of the pipes 5 and the axis of the rotating ring 33 coincide. During this process, due to the presence of the return spring 310, the rotating ring 33 will drive the lifting seat 37 to rise and fall, so that the rotating ring 33 adapts to the specifications of the pipes 5, solving the problem of complex calculation of the axis height of the pipes 5.

[0054] Additionally, when the diameter of pipe 5 is too large, and the top of rotating ring 33 blocks pipe 5 in its natural state, rotating ring 33 can be lifted manually or with tools to allow pipe 5 to pass through rotating ring 33.

[0055] The present invention provides a welding device for metal pipes 5 used in water conservancy construction. In this embodiment, the first power component includes a gear ring 34 and a first servo motor 38. The gear ring 34 is mounted on a rotating ring 33, and the first servo motor 38 is fixedly mounted on a lifting seat 37. The output shaft of the first servo motor 38 is fixedly connected to a first gear 36, and the first gear 36 meshes with the gear ring 34.

[0056] Of course, the first power assembly is not limited to one structure; any structure that can provide driving force for the rotating ring 33 is acceptable.

[0057] The present invention provides a welding device for metal pipes 5 used in water conservancy construction. Due to the presence of the return spring 310, the lifting seat 37 is in an unstable state. When the first power component drives the pipe 5 to rotate, the rotating ring 33 itself has a centrifugal force, which may cause the pipe 5 and the lifting seat 37 to vibrate up and down, resulting in a misalignment between the two pipes 5 and a reduction in welding quality. Therefore, in this embodiment, the driving mechanism 3 also includes a second telescopic rod 313. The movable end of the second telescopic rod 313 is fixedly installed with an electromagnet 312 through a connecting rod. The side of the lifting seat 37 is embedded with an iron plate 311 that is compatible with the electromagnet 312.

[0058] Specifically, after the pipe 5 is clamped by multiple clamping plates 32, the power supply of the electromagnet 312 is turned on. The electromagnet 312 attracts the iron plate 311 on the side of the lifting seat 37, thereby fixing the lifting seat 37 and preventing the rotating ring 33 from causing the pipe 5 to vibrate.

[0059] Alternatively, when the diameter of pipe 5 is large, the iron plate 311 can be attracted by electromagnet 312 first, and the lifting seat 37 can be raised by the second telescopic rod 313. The lifting seat 37 will then drive the rotating ring 33 to rise. After pipe 5 passes through the rotating ring 33, the power supply of electromagnet 312 is cut off. Under gravity, the rotating ring 33 and the lifting seat 37 will descend. Then, the clamping plate 32 will abut against the surface of pipe 5, preventing the rotating ring 33 from descending. Next, multiple first telescopic rods 31 are activated so that multiple clamping plates 32 are clamped on pipe 5. The axis of rotating ring 33 and the axis of pipe 5 will automatically coincide. Then, the power supply of electromagnet 312 is turned on to fix the lifting seat 37, so that the rotating ring 33 can drive pipe 5 to rotate.

[0060] In this invention, there is no need to calculate the axial height after replacing the pipe 5, nor is it necessary to calculate how far the second telescopic rod 313 needs to rise with the lifting seat 37. The rotating ring 33 can automatically adapt to the change in the pipe diameter of the pipe 5, and eventually make the axis of the rotating ring 33 coincide with the axis of the pipe 5, making the operation of the device simpler.

[0061] The present invention provides a welding device for metal pipe 5 used in water conservancy construction. In this embodiment, the detection mechanism 4 includes two linear tracks 410, both of which are fixedly installed on the welding table 1. The two linear tracks 410 are respectively arranged on both sides of the pipe 5. Sliding cylinders 412 are slidably installed on both linear tracks 410. Lifting rods 47 are slidably installed at the top of both sliding cylinders 412. A second arc-shaped track 41 is fixedly installed between the two lifting rods 47. A slide frame 43 is slidably installed on the second arc-shaped track 41. A housing 44 is fixedly installed at the bottom of the slide frame 43. A data processing module and a feedback module are provided inside the housing 44. Two laser rangefinders 45 are installed at the bottom of the housing 44. Both laser rangefinders 45 are electrically connected to the data processing module.

[0062] The detection mechanism 4 also includes a second power component, which is mounted on the slide 43 and is used to drive the slide 43 to slide along the second arc-shaped track 41.

[0063] The detection mechanism 4 also includes a second servo motor 413, which is mounted on the welding table 1. The output shaft of the second servo motor 413 is fixedly connected to a lead screw 411, which is threadedly connected to the slide cylinder 412.

[0064] The detection mechanism 4 also includes a synchronization structure, which is installed between the lifting rod 47 and the lifting seat 37. The synchronization structure is used to make the lifting rod 47 and the lifting seat 37 move synchronously, and the axis of the second arc track 41 coincides with the axis of the rotating ring 33.

[0065] Specifically, initially, the second arc-shaped track 41 is located to the side of the junction of the two pipes 5 to avoid affecting the welding assembly 7 to weld the pipes 5.

[0066] When detecting the coaxiality of the two pipes 5, the second servo motor 413 drives the lead screw 411 to rotate, the lead screw 411 drives the slide cylinder 412 to move, and the slide cylinder 412 drives the second arc track 41 to move through the lifting rod 47. The second arc track 41 is moved to the junction of the two pipes 5, and the slide 43 is located to the side of the junction of the two pipes 5, and the two laser rangefinders 45 are located to the side of the two pipes 5 respectively.

[0067] The laser rangefinders 45 are activated. The two laser rangefinders 45 respectively measure the distance from the carriage 43 to the outer diameter of the two pipes 5, and the values ​​are recorded as X1 and Y1 respectively. Then, the second power unit drives the carriage 43 to move, and the carriage 43 will rotate around the pipe 5. The two laser rangefinders 45 then measure the distance to the outer diameter of the pipe 5 again, and the subsequent values ​​are recorded as X2, X3, X4...X n and Y2, Y3, Y4...Y n The carriage 43 records data every 3°~5° of rotation and transmits this data to the data processing module. The data processing module uses the two sets of data to determine whether the axes of the two pipes 5 coincide. The determination principle formula is as follows:

[0068] H n =X n -Y n (1)

[0069] O n =H n -H n+1 (2)

[0070] Wherein: H n The difference in wall thickness between the two pipes 5;

[0071] X n and Y n These are the distances from carriage 43 to the two pipes 5, respectively;

[0072] O n The difference in the axial center of the two pipes 5;

[0073] Substituting the above two sets of data into the two formulas, we can obtain a set of O values. Based on the maximum value of O (which can be measured with the carriage 43 directly above the pipe 5), the height of the pipe 5 can be adjusted by the adjustable placement component 6 to reduce the value of O. When all O values ​​are zero, it means that the axes of the two pipes 5 coincide.

[0074] The feedback module can be a display connected to the data processing module, which can directly display the value of O. Based on the value of O, the staff can intuitively judge the position difference between the two pipes 5 so as to adjust the placement component 6.

[0075] The present invention provides a welding device for metal pipes 5 used in water conservancy construction. In this embodiment, the second power component includes a fourth servo motor and an internal gear plate 46. The fourth servo motor is mounted on a slide 43, and the internal gear plate 46 is fixedly mounted on a second arc-shaped track 41. The axis of the internal gear plate 46 coincides with the axis of the second arc-shaped track 41. The output shaft of the fourth servo motor is fixedly mounted with a second gear 42, and the second gear 42 and the internal gear plate 46 are meshed together.

[0076] Specifically, two sets of second power components can be set up and installed on both sides of the second arc-shaped track 41 to drive the carriage 43 to move smoothly.

[0077] The present invention provides a welding device for metal pipes 5 used in water conservancy construction. In this embodiment, the synchronous structure includes a guide rod 48 and a guide cylinder 49. The guide rod 48 is fixedly connected to the lifting rod 47, and the guide cylinder 49 is fixedly connected to the lifting seat 37. The guide rod 48 and the guide cylinder 49 are slidably installed.

[0078] Specifically, when the lifting seat 37 drives the rotating ring 33 to rise and fall, the guide cylinder 49 will drive the lifting rod 47 and the second arc track 41 to rise and fall through the guide rod 48. Since the axes of the rotating ring 33 and the second arc track 41 coincide, when the rotating ring 33 is relatively fixed with the pipe 5, the second arc track 41 is also relatively fixed with the pipe 5. At this time, the axis of the second arc track 41 coincides with the axis of the pipe 5 on the fixed placement assembly 2, so the detection mechanism 4 can perform coaxiality detection with a pipe 5 as a reference.

[0079] The present invention provides a welding device for metal pipes 5 used in water conservancy construction. In this embodiment, the welding assembly 7 includes a mounting frame 71, which is fixedly mounted on the welding table 1. A third telescopic rod 72 is fixedly mounted on the mounting frame 71. The movable end of the third telescopic rod 72 is fixedly connected to a mounting plate 73. A welding torch 74 is mounted on the mounting plate 73. The welding torch 74 is connected to the main body of the welding machine (not shown).

[0080] After the inspection is completed and the two pipes 5 are made coaxial, the second arc-shaped track 41 is removed. Then, the third telescopic rod 72 drives the welding gun 74 to descend, the power of the welding machine is turned on, and the end of the welding gun 74 contacts the pipe 5. Spot welding is performed first, and then the drive mechanism 3 drives the pipe 5 to rotate 90° and spot weld again. This process is repeated to perform four spot welds on the pipe 5, with equal spot welding angles, to avoid deformation between the two pipes 5 during subsequent welding. Finally, the drive mechanism 3 drives the pipe 5 to rotate continuously, and the welding gun 74 continuously welds the pipe 5.

[0081] Working principle:

[0082] Two pipes 5 are placed on the fixed placement component 2 and the adjustable placement component 6 respectively, and the ends of the two pipes 5 are joined together. Then, one pipe 5 is clamped and fixed by the drive mechanism 3. The second arc track 41 is moved to the side of the ends of the two pipes 5 by the second servo motor 413. The coaxiality of the two pipes 5 is detected by the laser rangefinder 45. According to the detection result, the height of the other pipe 5 is adjusted by the adjustable placement component 6 so that the axes of the two pipes 5 coincide. The second arc track 41 is moved away, and the two are welded by the welding component 7.

[0083] Specifically, the pipe 5 is first spot-welded, then the pipe 5 is rotated 90° by the drive mechanism 3 and spot-welded again. This process is repeated until the pipe 5 is spot-welded four times with equal angles to avoid deformation between the two pipes 5 during subsequent welding. Finally, the drive mechanism 3 drives the pipe 5 to rotate continuously, and the welding gun 74 continuously welds the pipe 5.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0085] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A metal pipe welding device for hydraulic construction, comprising a welding table, characterized in that, The welding platform is equipped with multiple fixed placement components and multiple adjustable placement components. The multiple fixed placement components and multiple adjustable placement components are located on both sides of the welding platform. The multiple fixed placement components and multiple adjustable placement components are used to place pipes. The adjustable placement components can also drive the pipes to move up and down. The welding table is also equipped with a drive mechanism and a detection mechanism. The drive mechanism is located among multiple fixed components. The drive mechanism is used to drive the pipe to rotate, and the detection mechanism is used to detect whether the axes of the two pipes coincide. The welding platform is also equipped with a welding assembly located on the side of the pipe. The output end of the welding assembly is located above the joint end of the two pipes. The welding assembly is used to weld the two pipes together.

2. The metal pipe welding device for water conservancy construction according to claim 1, characterized in that, The fixed placement assembly includes a placement frame, which is fixedly mounted on a welding table, and two first transmission rollers are rotatably mounted on the top of the placement frame.

3. The metal pipe welding device for water conservancy construction according to claim 1, characterized in that, The adjustable placement assembly includes a second fixed cylinder, which is fixedly mounted on a welding table. A lifting frame is slidably mounted inside the second fixed cylinder. Two second transmission rollers are rotatably mounted on the top of the lifting frame. A screw is rotatably mounted inside the second fixed cylinder, with one end of the screw threadedly connected to the lifting frame. A third servo motor is also mounted on the welding table. A transmission rod is fixedly connected to the output shaft of the third servo motor. A transmission pair is connected between the end of the transmission rod that extends into the second fixed cylinder and the screw.

4. The metal pipe welding device for water conservancy construction according to claim 1, characterized in that, The driving mechanism includes a first fixed cylinder fixedly installed on the welding table, a lifting seat slidably installed inside the first fixed cylinder, a return spring connected between the lifting seat and the first fixed cylinder, a first arc-shaped track fixedly installed on the lifting seat, a rotating ring slidably installed on the first arc-shaped track, and a plurality of evenly arranged first telescopic rods installed on the inner side wall of the rotating ring, with clamps fixedly installed at the movable ends of the plurality of first telescopic rods. The driving mechanism further includes a first power component, which is mounted on the lifting seat. The output end of the first power component is connected to the rotating ring for transmission. The first power component is used to drive the rotating ring to slide along the first arc-shaped track.

5. The metal pipe welding device for water conservancy construction according to claim 4, characterized in that, The drive mechanism also includes a second telescopic rod, the movable end of which is fixedly mounted with an electromagnet via a connecting rod, and the side of the lifting seat is fitted with an iron plate adapted to the electromagnet.

6. The metal pipe welding device for water conservancy construction according to claim 4, characterized in that, The detection mechanism includes two linear tracks, both of which are fixedly installed on a welding table. The two linear tracks are respectively located on both sides of the pipe. Sliding cylinders are slidably installed on both linear tracks. Lifting rods are slidably installed at the top of each of the two sliding cylinders. A second arc-shaped track is fixedly installed between the two lifting rods. A slide frame is slidably installed on the second arc-shaped track. A housing is fixedly installed at the bottom of the slide frame. A data processing module and a feedback module are installed inside the housing. Two laser rangefinders are installed at the bottom of the housing. Both laser rangefinders are electrically connected to the data processing module. The detection mechanism also includes a second power component, which is mounted on the slide and is used to drive the slide to slide along the second arc-shaped track. The detection mechanism also includes a second servo motor, which is mounted on a welding table. The output shaft of the second servo motor is fixedly connected to a lead screw, which is threadedly connected to a slide cylinder. The detection mechanism also includes a synchronization structure, which is installed between the lifting rod and the lifting seat. The synchronization structure is used to make the lifting rod and the lifting seat move synchronously, and the axis of the second arc-shaped track coincides with the axis of the rotating ring.

7. The metal pipe welding device for water conservancy construction according to claim 6, characterized in that, The second power assembly includes a fourth servo motor and an internal gear plate. The fourth servo motor is mounted on a carriage, and the internal gear plate is fixedly mounted on a second arc-shaped track. The axis of the internal gear plate coincides with the axis of the second arc-shaped track. A second gear is fixedly mounted on the output shaft of the fourth servo motor, and the second gear meshes with the internal gear plate.

8. The metal pipe welding device for water conservancy construction according to claim 6, characterized in that, The synchronization structure includes a guide rod and a guide cylinder. The guide rod is fixedly connected to the lifting rod, and the guide cylinder is fixedly connected to the lifting seat. The guide rod and the guide cylinder are slidably installed together.

9. The metal pipe welding device for water conservancy construction according to claim 1, characterized in that, The welding assembly includes a mounting frame, which is fixedly mounted on a welding table. A third telescopic rod is fixedly mounted on the mounting frame, and a mounting plate is fixedly connected to the movable end of the third telescopic rod. A welding torch is mounted on the mounting plate and is connected to the main body of the welding machine.

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