Metal pipe fitting welding device

Abstract

The invention relates to the technical field of pipe fitting welding, and particularly discloses a metal pipe fitting welding device which comprises a machine body for containing pipe fittings and a portal frame fixedly installed at the top of the machine body, an air cylinder is fixedly installed at the top of the portal frame, a sliding table mechanism is arranged at the top of the machine body, a welding gun is arranged on the sliding table mechanism, and a driving mechanism is arranged on the machine body. Two extrusion inner supporting mechanisms in bilateral symmetry are arranged on the driving mechanism, longitudinal pressing force is applied to the transverse pipe and the two vertical pipes through pressing plates, the transverse pipe and the two vertical pipes are further longitudinally limited, and the problem that the welding quality is affected due to the fact that the transverse pipe and the two vertical pipes are not tightly attached is solved; and meanwhile, the two deviation preventing plates enter the pipe fitting to be in clearance fit with the vertical pipes and the transverse pipe, so that the transverse pipe and the two vertical pipes are further horizontally limited through ingenious utilization of the tiny clearance, the welding stability is further improved, and deviation of the transverse pipe and the two vertical pipes in the horizontal direction in the welding process is avoided.

Description

Technical Field

[0001] This invention relates to the field of pipe welding technology, and more specifically, to a metal pipe welding apparatus. Background Technology

[0002] Metal pipe fittings are pipe accessories that play a role in connecting and sealing metal pipes. They can be classified according to their material into forged pipe fittings, cast pipe fittings, welded pipe fittings, and steel pipe fittings. Among them, welded pipe fittings are mainly used in piping systems to connect straight pipe sections, change direction, branch or terminate pipes. They are connected to the pipe by welding and can provide higher strength and sealing performance than threaded or flanged connections.

[0003] Welded four-way metal pipe is a type of welded pipe fitting. Its production process mainly includes preparation, manufacturing and forming, cleaning and pretreatment, welding, post-treatment and inspection and packaging. After the two vertical pipe sections and one horizontal pipe section are cleaned, they need to be sent to the welding process for welding and fixing.

[0004] Current welding equipment generally uses two three-jaw chucks to expand and support two vertical pipe sections. Then, a horizontal pipe is suspended between the two vertical pipe sections, and the two three-jaw chucks are controlled to move closer together, pressing the two vertical pipe sections against the outside of the horizontal pipe to clamp the horizontal pipe and fix it. Then, the three-jaw chucks are controlled to rotate to start the welding operation. However, this fixing method has certain defects: the horizontal pipe is fixed only by being suspended between the two vertical pipe sections and pressed, lacking sufficient support points. The two ends of the horizontal pipe lack certain limits, and the horizontal pipe is fixed only by the pressing of the vertical pipe. This can easily cause the horizontal pipe to slide and shift during the welding rotation due to uneven force. During the welding process, even a slight movement or deformation of the pipe can cause the welding position to shift, thus affecting the welding effect. Summary of the Invention

[0005] This invention provides a metal pipe welding device, which solves the technical problem that the stability of horizontal pipes fixed by suspending them between two vertical pipes and pressing them together in the prior art needs to be improved.

[0006] This invention provides a metal pipe welding device, including a body for placing pipes and a gantry frame fixedly installed on the top of the body. A cylinder is fixedly installed on the top of the gantry frame. A sliding table mechanism is provided on the top of the body, and a welding torch is provided on the sliding table mechanism. A drive mechanism is provided on the body, and two symmetrically arranged internal compression support mechanisms are provided on the drive mechanism. A flip-locking mechanism is provided on the internal compression support mechanism. The internal compression support mechanism includes a spring telescopic rod, a compression assembly, a fixed cylinder fixedly installed on the telescopic section of the spring telescopic rod, and several circumferentially distributed internal support assemblies. The flip-locking mechanism includes two symmetrically arranged flip-locking assemblies and a meshing assembly, a movable frame fixedly installed on the output end of the cylinder, and two anti-deviation plates fixedly installed on the outside of the movable frame and symmetrically arranged front and back. Pressure plates are fixedly installed on opposite sides of the two anti-deviation plates.

[0007] The meshing assembly includes two mounting brackets fixedly installed on the outside of the rotating section of the spring telescopic rod and symmetrically arranged vertically, and a driven gear rotatably installed on the mounting brackets. The flip-fastening assembly includes two L-shaped rods fixedly installed at the front and rear ends of the driven gear shaft, and an arc-shaped buckle plate is installed at the other end of the two L-shaped rods.

[0008] The drive mechanism drives the two spring telescopic rods on the left and right to approach each other, so that the two inner support components are inserted into the pipe and expand under the action of the extrusion component to support the inner wall of the pipe. At the same time, the extrusion component drives the engagement component to drive the L-shaped rod to rotate towards the side closer to the mounting bracket and press it against the inner wall of the pipe, thereby supporting and flipping the pipe for positioning. Then, the cylinder output end drives the pressure plate to move down and press the pipe.

[0009] Furthermore, the inner support assembly includes two intersecting fork arms, fork arm one and fork arm two. Fork arm one is hinged to the outside of the rotating section of the spring telescopic rod, and fork arm two is hinged to the outside of the fixed cylinder. An inner support plate is hinged to the end of fork arm one away from the spring telescopic rod.

[0010] Furthermore, a fixed seat is fixedly installed on the side of the inner support plate that is close to the spring telescopic rod, and a sliding groove is provided on the fixed seat to slide and connect with the end of the fork arm away from the fixed cylinder.

[0011] Furthermore, the extrusion assembly includes a connecting rod fixedly installed on the side of the fixed cylinder away from the spring telescopic rod and an abutment plate fixedly installed on the end of the connecting rod away from the fixed cylinder, and a fixing rod is fixedly installed on the outer side of the rotating section of the spring telescopic rod.

[0012] Furthermore, the fixed cylinder is slidably connected to the outside of the rotating section of the spring telescopic rod, and a limiting groove is provided on the fixed cylinder to slidably connect with the fixed rod.

[0013] Furthermore, the meshing assembly also includes a mounting rod fixedly mounted on the side of the abutment plate near the fixed cylinder and a drive gear rotatably mounted on the mounting bracket and meshing with the driven gear. The mounting rod near the drive gear has a plurality of teeth that mesh with the drive gear.

[0014] Furthermore, the drive mechanism includes a bidirectional lead screw rotatably mounted between the left and right inner walls of the machine body and two drive plates threadedly connected to the outside of the bidirectional lead screw and symmetrically arranged on the left and right. Several limit rods are fixedly mounted on the top of the drive plates, and the top of the machine body has a through groove with the same number of limit rods as the limit rods and which are slidably connected to the corresponding limit rods.

[0015] Furthermore, an electric telescopic plate is installed at the top of several limit rods on the same drive plate. A spring telescopic rod is rotatably installed on the side opposite to the gantry of the telescopic section of the electric telescopic plate. A drive motor is fixedly installed on the left side of the machine body. The left end of the bidirectional lead screw passes through the machine body and is fixedly connected to the output shaft of the drive motor. The pipe is composed of a horizontal pipe and two vertical pipes to be welded.

[0016] Furthermore, the slide mechanism includes an X-axis slide rail fixedly installed on the top of the machine body and an X-axis slide table slidably connected to the X-axis slide rail. A Y-axis slide rail is fixedly connected to the top of the X-axis slide table, and a Y-axis slide table is slidably connected to the top of the Y-axis slide rail.

[0017] Furthermore, a Z-axis slide rail is fixedly installed on the top of the Y-axis slide table, and a Z-axis slide table is slidably installed on the front side of the Z-axis slide rail. The welding torch is fixedly installed on the front side of the Z-axis slide table.

[0018] The beneficial effects of this invention are as follows: 1. By applying longitudinal clamping force to the horizontal pipe and the two vertical pipes through the pressure plate, the horizontal pipe and the two vertical pipes are further longitudinally limited, avoiding the problem of insufficient fit between the horizontal pipe and the two vertical pipes, which would affect the welding quality. At the same time, the two anti-deviation plates enter the pipe fitting and fit with the gap between the vertical pipe and the horizontal pipe, thereby further limiting the horizontal pipe and the two vertical pipes through the ingenious use of the small gap, thereby further improving the stability of the welding and preventing the horizontal pipe and the two vertical pipes from shifting horizontally during the welding process.

[0019] 2. By expanding outward through the inner support plate, the inner wall of the horizontal tube is internally supported and fixed, providing solid support for the horizontal tube. This effectively prevents the horizontal tube from shifting due to external forces during welding, thus ensuring the stability and reliability of the welding process. At the same time, the expansion of the inner support plate is directly driven by the deformation of the spring telescopic rod, eliminating the need for a separate drive component to control the expansion of the inner support plate. This reduces additional transmission components, making the inner support assembly structure more compact and saving on equipment operating costs.

[0020] 3. The arc-shaped buckle plates on the upper and lower sides are pressed against the inner walls of the two vertical pipes to fix them in place. This physical contact provides stable support and fixation for the vertical pipes, effectively preventing them from moving or deforming during welding and further improving welding stability. The deformation of the spring telescopic rod directly triggers the rotation and clamping of the arc-shaped buckle plates, eliminating the need for an additional power source and control mechanism, thus further reducing the cost of using the device. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a three-dimensional structural diagram of the slide mechanism and through groove of the present invention.

[0023] Figure 3 This is a three-dimensional structural diagram of the pipe fitting, flip-locking mechanism, compression inner support mechanism and drive mechanism of the present invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the electric telescopic plate, spring telescopic rod, inner support plate, mounting frame, and arc-shaped buckle plate of the present invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the fork arm, inner support plate, L-shaped rod, teeth, drive gear, and driven gear of the present invention.

[0026] Figure 6 This is a three-dimensional structural diagram of the connecting rod, abutment plate, fork arm, fixing seat, and fixing rod of the present invention.

[0027] Figure 7 This is a three-dimensional structural diagram of the mounting bracket, spring telescopic rod, drive gear, driven gear, and abutment plate of the present invention.

[0028] Figure 8 This is a three-dimensional structural diagram of the cylinder, moving frame, and anti-deviation plate of the present invention.

[0029] In the diagram: 1. Machine body; 2. Pipe fitting; 3. Extrusion inner support mechanism; 4. Flip-locking mechanism; 5. Slide mechanism; 6. Drive mechanism; 7. Gantry frame; 8. Cylinder; 9. Welding torch; 301. Inner support assembly; 302. Extrusion assembly; 303. Spring telescopic rod; 304. Fixed cylinder; 3011. Fork arm one; 3012. Fork arm two; 3013. Inner support plate; 3014. Fixed seat; 3015. Slide groove; 3021. Connecting rod; 3022. Abutment plate; 3023. Fixed rod; 3024. Limiting groove; 401. Flip-locking assembly; 402. Engaging assembly. ; 403, Moving frame; 404, Anti-deviation plate; 405, Pressure plate; 4011, L-shaped rod; 4012, Arc-shaped buckle plate; 4021, Mounting bracket; 4022, Drive gear; 4023, Driven gear; 4024, Mounting rod; 4025, Tooth; 501, X-axis slide rail; 502, X-axis slide table; 503, Y-axis slide rail; 504, Y-axis slide table; 505, Z-axis slide rail; 506, Z-axis slide table; 601, Two-way lead screw; 602, Drive plate; 603, Limit rod; 604, Through slot; 605, Electric telescopic plate; 606, Drive motor. Detailed Implementation

[0030] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed to enable those skilled in the art to better understand and implement the subject matter described herein. Changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0031] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8This embodiment proposes a metal pipe welding device, including a body 1 for placing pipes 2 and a gantry 7 fixedly installed on the top of the body 1. A cylinder 8 is fixedly installed on the top of the gantry 7. A slide mechanism 5 is provided on the top of the body 1, and a welding torch 9 is provided on the slide mechanism 5. A drive mechanism 6 is provided on the body 1, and two symmetrical compression inner support mechanisms 3 are provided on the drive mechanism 6. A flip-locking mechanism 4 is provided on the compression inner support mechanism 3. The compression inner support mechanism 3 includes a spring telescopic rod 303, a compression component 302, a fixed cylinder 304 fixedly installed on the telescopic section of the spring telescopic rod 303, and several circumferentially distributed inner support components 301. The flip-locking mechanism 4 includes two symmetrical flip-locking components 401 and a meshing component 402, a movable frame 403 fixedly installed on the output end of the cylinder 8, and two anti-deviation plates 404 fixedly installed on the outside of the movable frame 403 and symmetrically installed front and back. A pressure plate 405 is fixedly installed on the opposite side of the two anti-deviation plates 404.

[0032] See Figure 1 and Figure 3 The drive mechanism 6 includes a bidirectional lead screw 601 rotatably installed between the left and right inner walls of the machine body 1 and two drive plates 602 threadedly connected to the outside of the bidirectional lead screw 601 and symmetrically arranged on the left and right. Several limit rods 603 are fixedly installed on the top of the drive plate 602. The top of the machine body 1 has a through groove 604 with the same number of limit rods 603 and which is slidably connected to the corresponding limit rods 603.

[0033] See Figure 1 , Figure 3 and Figure 4 An electric telescopic plate 605 is installed on the top of several limiting rods 603 on the same drive plate 602. A spring telescopic rod 303 is rotatably installed on the side opposite to the telescopic section of the electric telescopic plate 605 and the gantry 7. The spring telescopic rod 303 is connected to an external power source. The rotating section of the spring telescopic rod 303 is driven to rotate by the external power source. A drive motor 606 is fixedly installed on the left side of the machine body 1. The left end of the bidirectional lead screw 601 passes through the machine body 1 and is fixedly connected to the output shaft of the drive motor 606. The pipe fitting 2 consists of a horizontal pipe and two vertical pipes to be welded.

[0034] In practical use, first place one section of the vertical tube on top of the machine body 1, then place the horizontal tube on top of the vertical tube, and finally place the other section of the vertical tube on top of the horizontal tube to complete the placement of the pipe fitting 2. Next, start the drive motor 606. The output shaft of the drive motor 606 rotates, driving the bidirectional lead screw 601 to rotate. This causes the two drive plates 602, which are threaded to the bidirectional lead screw 601, to move closer together under the limiting action of the limiting rod 603 and the through groove 604. This, in turn, causes the two electric telescopic plates 605 to move closer together, making the two spring telescopic rods 303 move closer together. This, in turn, causes the two left and right compression inner support mechanisms 3 and the flip-locking mechanism 4 to move closer together and insert into the horizontal tube to internally support and fix the horizontal tube. At the same time, it clamps and fixes the inner walls of the two vertical tubes. Then, the output end of the cylinder 8 pushes the moving frame 403 to move downward. This causes the anti-deviation plate 404 and pressure plate 405 to move downwards until the pressure plate 405 presses firmly against the top of the upper vertical pipe, thus completing the clamping of pipe fitting 2. By applying longitudinal clamping force to the horizontal pipe and the two vertical pipes, the horizontal pipe and the two vertical pipes are further longitudinally limited, avoiding problems that affect the welding quality due to insufficient fit between the horizontal pipe and the two vertical pipes. At the same time, the two anti-deviation plates 404 enter the interior of pipe fitting 2 and fit with the gap between the vertical pipe and the horizontal pipe. By cleverly utilizing the small gap, the horizontal pipe and the two vertical pipes are further horizontally limited, thereby further improving the stability of the welding and preventing the horizontal pipe and the two vertical pipes from shifting horizontally during the welding process. This ensures the smooth installation of pipe fitting 2 and limits the movement range of pipe fitting 2 to a certain extent, thus enhancing the stability of the overall structure.

[0035] After welding is completed, the pressure plate 405 and the anti-deviation plate 404 are driven away from the pipe fitting 2 by the output end of the cylinder 8, releasing the clamping and limiting of the pipe fitting 2. Then, the drive motor 606 is started. The output shaft of the drive motor 606 rotates, driving the bidirectional lead screw 601 to rotate. This causes the two drive plates 602, which are threaded to the bidirectional lead screw 601, to move away from each other under the limiting action of the limiting rod 603. This, in turn, causes the two electric telescopic plates 605 to move away from each other, causing the two spring telescopic rods 303 to move away from each other. This, in turn, causes the two left and right compression inner support mechanisms 3 and the flip-locking mechanism 4 to move away from each other and leave the inner wall of the horizontal tube to reset and release the inner support fixation of the horizontal tube. At the same time, the clamping fixation of the inner walls of the two vertical tubes is released.

[0036] See Figure 3 , Figure 4 and Figure 6 The inner support assembly 301 includes a fork arm 3011 and a fork arm 3012 that are connected to each other. The fork arm 3011 is hinged to the outside of the rotating section of the spring telescopic rod 303, and the fork arm 3012 is hinged to the outside of the fixed cylinder 304. An inner support plate 3013 is hinged to the end of the fork arm 3011 away from the spring telescopic rod 303.

[0037] See Figure 3 , Figure 4 and Figure 6 A fixed seat 3014 is fixedly installed on the side of the inner support plate 3013 and the spring telescopic rod 303. The fixed seat 3014 has a sliding groove 3015 that is slidably connected to the end of the fork arm 3012 away from the fixed cylinder 304.

[0038] See Figure 3 , Figure 4 , Figure 6 and Figure 7 The extrusion assembly 302 includes a connecting rod 3021 fixedly installed on the side of the fixed cylinder 304 away from the spring telescopic rod 303 and an abutment plate 3022 fixedly installed on the end of the connecting rod 3021 away from the fixed cylinder 304. A fixing rod 3023 is fixedly installed on the outer side of the rotating section of the spring telescopic rod 303.

[0039] See Figure 3 , Figure 4 , Figure 6 and Figure 7 The fixed cylinder 304 is slidably connected to the outside of the rotating section of the spring telescopic rod 303, and the fixed cylinder 304 is provided with a limiting groove 3024 that is slidably connected to the fixed rod 3023.

[0040] In practical use, the two spring telescopic rods 303 move closer together, causing the left and right abutment plates 3022 to abut against each other. As the spring telescopic rods 303 continue to move, they begin to compress, thereby causing the rotating section of the spring telescopic rods 303 to move closer to the fixed cylinder 304. During this process, the fixed rod 3023 slides along the limiting groove 3024 on the fixed cylinder 304, thereby limiting the fixed cylinder 304 and preventing it from twisting. This, in turn, causes the hinge end of the first fork arm 3011 and the spring telescopic rod 303 to move towards the hinge end of the second fork arm 3012 and the fixed cylinder 304, thus forming a scissor-closing action. Meanwhile, the end of the fork arm 3012 that is close to the inner support plate 3013 will slide inside the slide groove 3015, thereby driving the inner support plate 3013 to expand outward, providing internal support and fixing the inner wall of the horizontal tube, thus providing solid support for the horizontal tube. This effectively prevents the horizontal tube from shifting due to external forces during the welding process, ensuring the stability and reliability of the welding process. At the same time, by using the deformation of the spring telescopic rod 303 to directly drive the expansion of the inner support plate 3013, there is no need to set up a separate drive component to control the expansion of the inner support plate 3013, thereby reducing additional transmission components, making the structure of the inner support assembly 301 more compact, and saving the cost of using the device.

[0041] After welding is completed, the two spring telescopic rods 303 move away from each other. During this process, the spring telescopic rods 303 gradually return to their original position, causing the rotating section of the spring telescopic rods 303 to move away from the fixed cylinder 304. This, in turn, causes the hinge end of the first fork arm 3011 and the spring telescopic rod 303 to move away from the hinge end of the second fork arm 3012 and the fixed cylinder 304, thus forming a scissor-like opening action. At the same time, the end of the second fork arm 3012 that is close to the inner support plate 3013 will slide inside the slide groove 3015, thereby causing the inner support plate 3013 to disengage from the inner wall of the horizontal tube and return to its original position. Then, the left and right abutment plates 3022 disengage from each other and continue to move away from the inside of the horizontal tube as the spring telescopic rods 303 continue to move and return to their original position.

[0042] See Figure 3 , Figure 4 , Figure 5 and Figure 7 The meshing assembly 402 includes two mounting brackets 4021 fixedly installed on the outside of the rotating section of the spring telescopic rod 303 and symmetrically mounted vertically, and a driven gear 4023 rotatably mounted on the mounting brackets 4021. The flip-fastening assembly 401 includes two L-shaped rods 4011 fixedly installed at the front and rear ends of the gear shaft of the driven gear 4023, and an arc-shaped buckle plate 4012 is installed at the other end of the two L-shaped rods 4011.

[0043] See Figure 3 , Figure 4 , Figure 5 and Figure 7 The meshing assembly 402 further includes a mounting rod 4024 fixedly mounted on the side of the abutment plate 3022 near the fixed cylinder 304 and a drive gear 4022 rotatably mounted on the mounting bracket 4021 and meshing with the driven gear 4023. The mounting rod 4024 has a plurality of teeth 4025 that mesh with the drive gear 4022 on the side near the drive gear 4022.

[0044] In practical use, the rotating section of the spring telescopic rod 303 moves closer to the fixed cylinder 304, which in turn drives the upper and lower mounting brackets 4021 to move closer to the fixed cylinder 304. During this process, the drive gear 4022 meshes with the teeth 4025, causing the drive gear 4022 to rotate and mesh with the driven gear 4023, which in turn drives the driven gear 4023 to rotate. This, in turn, causes the L-shaped rod 4011 to rotate 90° closer to the mounting bracket 4021, so that the arc-shaped buckle plates 4012 on the upper and lower sides press against the inner walls of the two vertical pipes respectively, thereby clamping and fixing the two vertical pipes. This forms a stable support and fixation for the vertical pipes through physical contact, which can effectively prevent the vertical pipes from moving and deforming during the welding process, further improving the welding stability. Furthermore, by utilizing the deformation of the spring telescopic rod 303, the rotation and clamping of the arc-shaped buckle plates 4012 are directly triggered, eliminating the need for an additional power source and control mechanism, thus further reducing the operating cost of the device.

[0045] After welding is completed, the rotating section of the spring telescopic rod 303 moves away from the fixed cylinder 304, which in turn drives the upper and lower mounting brackets 4021 to move away from the fixed cylinder 304. During this process, the drive gear 4022 meshes with the teeth 4025, causing the drive gear 4022 to rotate and mesh with the driven gear 4023, which in turn drives the driven gear 4023 to rotate. This, in turn, causes the L-shaped rod 4011 to rotate 90° away from the mounting bracket 4021, so that the arc-shaped buckle plates 4012 on the upper and lower sides separate from the inner walls of the upper and lower vertical tubes, thereby releasing the clamping and fixing of the two vertical tubes.

[0046] See Figure 1 and Figure 2 The slide mechanism 5 includes an X-axis slide rail 501 fixedly installed on the top of the machine body 1 and an X-axis slide 502 slidably connected to the X-axis slide rail 501. A Y-axis slide rail 503 is fixedly connected to the top of the X-axis slide 502, and a Y-axis slide 504 is slidably connected to the top of the Y-axis slide rail 503.

[0047] See Figure 1 and Figure 2 A Z-axis slide rail 505 is fixedly mounted on the top of the Y-axis slide table 504. A Z-axis slide table 506 is slidably mounted on the front side of the Z-axis slide rail 505. The welding torch 9 is fixedly mounted on the front side of the Z-axis slide table 506. The X-axis slide rail 501, Y-axis slide rail 503, and Z-axis slide rail 505 are all connected to an external power source. The welding torch 9 is an existing rotary welding torch that can rotate within a certain range.

[0048] In practical use, the X-axis slide 502, Y-axis slide 504 and Z-axis slide 506 are controlled to move on the X-axis slide rail 501, Y-axis slide rail 503 and Z-axis slide rail 505 respectively, thereby driving the welding torch 9 to move, so that the welding torch 9 can weld along the connection between the horizontal pipe and the two vertical pipes respectively. At the same time, when it is necessary to adjust the pipe fitting 2 to flip and cooperate for welding during the welding process, the extension section of the electric telescopic plate 605 is used to push the squeezing inner support mechanism 3 and the flip locking mechanism 4 to drive the pipe fitting 2 to move upward and separate from the machine body 1. Then, the rotation section of the spring telescopic rod 303 is driven by the external power supply to rotate, thereby driving the pipe fitting 2 to rotate and cooperate for welding.

[0049] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A metal pipe welding device, characterized in that, For welding four-way pipe fittings, including: a machine body for placing pipe fittings and a gantry frame fixedly installed on the top of the machine body. The top of the machine body is provided with a slide table mechanism, and a welding torch is provided on the slide table mechanism. The machine body is provided with a drive mechanism, and the drive mechanism is provided with two left and right symmetrical compression inner support mechanisms. The compression inner support mechanism is provided with a flip-locking mechanism. The compression inner support mechanism includes a spring telescopic rod, a compression assembly, a fixed cylinder fixedly installed on the telescopic section of the spring telescopic rod, and several inner support assemblies distributed circumferentially. The flip-locking mechanism includes two flip-lock assemblies symmetrically arranged vertically and an engagement assembly. The meshing assembly includes two mounting brackets fixedly installed on the outside of the rotating section of the spring telescopic rod and symmetrically arranged vertically, and a driven gear rotatably installed on the mounting brackets. The flip-fastening assembly includes two L-shaped rods fixedly installed at the front and rear ends of the driven gear shaft, and an arc-shaped buckle plate is installed at the other end of the two L-shaped rods. The drive mechanism drives the two spring telescopic rods on the left and right to approach each other, so that the two inner support components are inserted into the pipe and expand under the action of the extrusion component to support the inner wall of the horizontal pipe of the pipe. At the same time, the extrusion component drives the engagement component to drive the L-shaped rod to rotate towards the side closer to the mounting bracket and press it against the inner wall of the vertical pipe of the pipe, thus completing the inner support and flip-locking positioning of the horizontal pipe and the two vertical pipes of the pipe in one go.

2. The metal pipe welding device according to claim 1, characterized in that, The inner support assembly includes two intersecting fork arms, fork arm one and fork arm two. Fork arm one is hinged to the outside of the rotating section of the spring telescopic rod, and fork arm two is hinged to the outside of the fixed cylinder. An inner support plate is hinged to the end of fork arm one away from the spring telescopic rod.

3. The metal pipe welding device according to claim 2, characterized in that, A fixed seat is fixedly installed on the side of the inner support plate that is close to the spring telescopic rod. The fixed seat has a sliding groove that is slidably connected to the end of the fork arm away from the fixed cylinder.

4. The metal pipe welding device according to claim 1, characterized in that, The extrusion assembly includes a connecting rod fixedly installed on the side of the fixed cylinder away from the spring telescopic rod and an abutment plate fixedly installed on the end of the connecting rod away from the fixed cylinder. A fixing rod is fixedly installed on the outer side of the rotating section of the spring telescopic rod.

5. The metal pipe welding device according to claim 4, characterized in that, The fixed cylinder is slidably connected to the outside of the rotating section of the spring telescopic rod, and a limiting groove is provided on the fixed cylinder to slidably connect with the fixed rod.

6. The metal pipe welding device according to claim 4, characterized in that, The meshing assembly also includes a mounting rod fixedly installed on the side of the abutment plate near the fixed cylinder and a drive gear rotatably installed on the mounting frame and meshing with the driven gear. The mounting rod has a number of teeth that mesh with the drive gear on the side near the drive gear.

7. The metal pipe welding device according to claim 1, characterized in that, A cylinder is fixedly installed on the top of the gantry frame. The flip-locking mechanism also includes a movable frame fixedly installed at the output end of the cylinder and two anti-deviation plates fixedly installed on the outside of the movable frame and symmetrically arranged front and back. Pressure plates are fixedly installed on the opposite side of the two anti-deviation plates.

8. The metal pipe welding device according to claim 1, characterized in that, The drive mechanism includes a bidirectional lead screw rotatably mounted between the left and right inner walls of the machine body and two drive plates threadedly connected to the outside of the bidirectional lead screw and symmetrically arranged on the left and right. Several limit rods are fixedly mounted on the top of the drive plates, and the top of the machine body has a through groove with the same number of limit rods as the limit rods and which are slidably connected to the corresponding limit rods.

9. A metal pipe welding device according to claim 8, characterized in that, A mounting plate is installed on the top of several limit rods at the top of the same drive plate. The spring telescopic rod is rotatably installed on the side opposite to the gantry of the telescopic section of the electric telescopic plate. The drive motor is fixedly installed on the left side of the machine body. The left end of the bidirectional lead screw passes through the machine body and is fixedly connected to the output shaft of the drive motor. The pipe is composed of a horizontal pipe and two vertical pipes to be welded.

10. A metal pipe welding device according to claim 1, characterized in that, The slide mechanism includes an X-axis slide rail fixedly installed on the top of the machine body and an X-axis slide table slidably connected to the X-axis slide rail. A Y-axis slide rail is fixedly connected to the top of the X-axis slide table, and a Y-axis slide table is slidably connected to the top of the Y-axis slide rail. A Z-axis slide rail is fixedly installed on the top of the Y-axis slide table, and a Z-axis slide table is slidably installed on the front side of the Z-axis slide rail. The welding torch is fixedly installed on the front side of the Z-axis slide table.

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