Tube butt-welding apparatus

Abstract

The present application discloses a kind of thick and thin tube butt welding equipment, belong to welding equipment technical field, including welding body and conveying line: welding body is equipped with rotatable welding torch and the lower punch body of up and down movement, upper punch body, conveying line passes through welding body and contains first, second conveying lane arranged up and down, corresponding set conveying thick pipe, thin pipe's conveying belt.The conveying line is equipped with upper support plate and lower support plate, and the conveying belt is attached to move respectively;Support plate surface is equipped with evenly arranged fixing part, and the upper fixing part is a circular ring (solid thick pipe), and the lower fixing part is a plurality of clamping claws (distributed in the circumferential direction, and the center is provided with two end diameter large and middle part diameter small mounting hole to fix the thin pipe);The conveying belt is provided with a round hole in the middle of the fixing part, for the lower punch body to pass through.The work, conveying belt conveys pipe, lower punch body jacks up thin pipe to pass through round hole and thick pipe, upper punch body applies pressure, lower punch body arc surface expands thin pipe to adapt to thick pipe, and drive ring belt welding torch circumferential welding.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and specifically to a butt welding device for thick and thin pipes. Background Technology

[0002] In the field of pipe processing, butt welding of thick and thin pipes is a common connection process, widely used in water supply and drainage, HVAC, petrochemical and other industries. However, the traditional butt welding process for thick and thin pipes has the following problems:

[0003] The process requires manual alignment and fixing of the thick and thin pipes, followed by manual operation of the welding torch. This not only consumes a lot of manpower but is also prone to deviations due to human error. Before joining the thick and thin pipes, the ends need to be flared. Traditional manual flaring or simple mechanical flaring can easily result in uneven flaring and mismatch between the outer diameter and the thick pipe, leading to poor weld sealing. During pipe transportation, the lack of dedicated support and fixing structures makes the pipes prone to shifting and shaking, further affecting the coaxiality of the joint.

[0004] Therefore, the present invention provides a welding device for coarse and fine tubes that solves the above-mentioned problems. Summary of the Invention

[0005] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a welding device for thick and thin tubes, which automatically feeds, precisely lifts, flares, and welds the tubes around their circumference, ensuring coaxiality and welding accuracy, preventing tube misalignment and scratches, and improving welding quality and efficiency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a butt welding device for coarse and fine tubes, comprising:

[0007] A welding body, on which a welding torch is mounted, the welding torch being able to rotate about a rotation axis;

[0008] The conveyor line passes through the interior of the welded body. The conveyor line includes a first conveyor channel and a second conveyor channel arranged vertically. The interior of the first conveyor channel is provided with an upper conveyor belt for conveying thick tubes, and the interior of the second conveyor channel is provided with a lower conveyor belt for conveying thin tubes.

[0009] The welding body is equipped with a vertically arranged moving channel that runs through the conveyor line. Inside the welding body, there is a lower stamping body that moves up and down. When the lower stamping body moves upward from the bottom, it can drive the thin tube at the bottom through the first conveyor channel and the thick tube to the top. The welding body is equipped with an upper stamping body that can apply pressure to the thin tube. The lower stamping body has an arc surface. When the upper stamping body applies pressure to the thin tube, the arc surface on the lower stamping body expands the end of the thin tube near the thick tube to match the outer diameter of the thick tube. The welding torch welds the thick tube and the thin tube together.

[0010] Preferably, the conveyor line includes an upper support plate and a lower support plate, the upper conveyor belt moves attached to the surface of the upper support plate, and the upper conveyor belt moves attached to the surface of the lower support plate.

[0011] Preferably, the upper support plate has a plurality of evenly arranged upper fixing members installed on its surface, and the lower support plate has a plurality of evenly arranged lower fixing members installed on its surface. The upper fixing member is a ring for installing a thick tube, and the lower fixing member is a claw for installing a thin tube.

[0012] Preferably, each of the fixing components has multiple claws, and the multiple claws are distributed circumferentially. The center of the fixing component is a mounting hole for fixing a thin tube, and the diameters at both ends of the mounting hole are larger than the diameter at the center.

[0013] Preferably, the upper conveyor belt has an upper circular hole in the middle of the upper fixing member, and the lower conveyor belt has a lower circular hole in the middle of the lower fixing member. When the lower stamping body moves upward, it will pass through the upper circular hole and the lower circular hole in sequence.

[0014] Preferably, a lower linear push rod is fixedly installed inside the welded body, and the lower stamping body is fixed on the output shaft of the lower linear push rod.

[0015] Preferably, a top plate is installed on the welded body, an upper linear push rod is fixed inside the top plate, and the upper stamping body is fixed on the output shaft of the upper linear push rod.

[0016] Preferably, a drive ring is rotatably mounted on the bottom of the top plate, and teeth are provided on the outer side of the drive ring. The welding torch is mounted on the bottom of the drive ring. A motor is fixed inside the top plate, and a drive gear is fixed on the output shaft of the motor. The drive gear meshes with the teeth on the gear ring.

[0017] Preferably, the end of the lower stamping body is an arc-shaped ring that is narrower at the top and wider at the bottom.

[0018] Preferably, the inner ring surface of the claw is an arc surface, which is wider at the top and narrower at the bottom, and the minimum diameter of the arc surface is smaller than the outer diameter of the thin tube. The claw is made of rubber.

[0019] The beneficial effects of this invention are as follows:

[0020] The upper and lower support plates define the conveyor belt track, while the upper fixed ring and the lower fixed claws with mounting holes ensure the coaxiality of the conveying of thick and thin tubes. The lower and upper linear push rods precisely control the lifting height of the lower stamping body and the pressure applied by the upper stamping body, ensuring the fitting accuracy of the flaring of the thin tube. The drive ring drives the welding torch to make uniform circular motion, avoiding trajectory deviations in manual welding and improving welding sealing and connection strength.

[0021] The layered support upper and lower plates, along with multi-directional fixing claws, provide circumferential clamping. The rubber claws elastically wrap around the pipes to prevent them from shifting or shaking during transport and welding. The rubber claws not only enhance the fixing friction of the thin pipes but also prevent scratching the pipe surface during clamping, protecting the appearance and integrity of the workpiece. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 This is a top view of the present invention.

[0024] Figure 3 The connection status of the welded body and the conveyor line. Figure 1 .

[0025] Figure 4 The connection status of the welded body and the conveyor line. Figure 2 .

[0026] Figure 5 This is an internal sectional view of the welded body.

[0027] Figure 6 This is a perspective view of the present invention.

[0028] Figure 7 for Figure 3 Enlarged view of point A in the middle.

[0029] Figure 8 for Figure 3 Enlarged view of section B in the middle.

[0030] In the diagram: 1. Welding body, 2. Conveyor line, 3. Welding gun, 4. Top plate, 5. Upper stamping body, 6. Upper conveyor belt, 7. Lower conveyor belt, 8. Upper fixing part, 9. Lower stamping body, 10. Claw, 11. Lower linear push rod, 12. Drive gear, 13. Drive ring. Detailed Implementation

[0031] The present invention is illustrated below with specific embodiments, but these are not intended to limit the invention.

[0032] Example 1

[0033] like Figures 1-8 As shown, this embodiment provides a butt welding device for thick and thin tubes, including a welding body 1 and a conveyor line 2. A welding torch 3 is installed on the welding body 1, and the welding torch 3 can rotate around a rotating shaft; the conveyor line 2 passes through the inside of the welding body 1 and includes a first conveyor channel and a second conveyor channel arranged vertically. The first conveyor channel is provided with an upper conveyor belt 6 for conveying thick tubes, and the second conveyor channel is provided with a lower conveyor belt 7 for conveying thin tubes.

[0034] A vertically arranged moving channel is installed on the welding body 1, which runs through the conveyor line 2. Inside the welding body 1, a lower stamping body 9 that can move up and down is installed. When the lower stamping body 9 moves upward from the bottom, it can drive the thin tube at the bottom to pass through the first conveyor channel and the thick tube in sequence and extend to the top. An upper stamping body 5 is also installed on the welding body 1. The upper stamping body 5 can apply pressure to the thin tube. The lower stamping body 9 has an arc surface. During the process of the upper stamping body 5 applying pressure to the thin tube, the arc surface can expand the end of the thin tube close to the thick tube to match the outer diameter of the thick tube. Then, the welding torch 3 welds the joint between the thick tube and the thin tube.

[0035] The end of the lower stamping body 9 is designed as an arc-shaped ring that is narrow at the top and wide at the bottom. When the thin tube is pushed upward, the narrow end of the arc-shaped ring is easy to insert into the thin tube; when the upper stamping body 5 applies pressure, the arc surface of the wide end of the arc-shaped ring contacts the inner wall of the thin tube, which can push the end of the thin tube outward, ensuring a stable flaring process and high fitting accuracy.

[0036] The inner ring surface of the clamp 10 in the device is arc-shaped, with a structure that is wider at the top and narrower at the bottom. The minimum diameter of the arc surface is smaller than the outer diameter of the thin tube. The clamp 10 is made of rubber. After the thin tube is inserted from the wider end of the clamp 10, it slides down the arc surface to the narrower part. With the elasticity of the clamp 10 itself, the thin tube is tightly wrapped. The rubber material not only prevents scratching the surface of the thin tube during clamping, but also enhances the friction with the thin tube, further improving the fixing effect.

[0037] Example 2

[0038] like Figures 1-8 As shown, this embodiment optimizes the structure of the conveyor line 2 of the butt welding equipment for thick and thin pipes based on Embodiment 1 to improve the stability of pipe conveying and fixing, as detailed below:

[0039] Conveyor line 2 includes an upper support plate and a lower support plate. The upper conveyor belt 6 moves along the surface of the upper support plate, and the lower conveyor belt 7 moves along the surface of the lower support plate. During operation, the upper conveyor belt 6 drives the thicker pipe to be conveyed along the extension direction of the upper support plate, and the lower conveyor belt 7 drives the thinner pipe to be conveyed along the extension direction of the lower support plate. The upper and lower support plates together form a two-layer support structure, providing stable load-bearing for the conveyor belts and limiting their movement trajectory to prevent deviation.

[0040] Multiple evenly arranged upper fixing parts 8 are installed on the surface of the upper support plate, and multiple evenly arranged lower fixing parts are installed on the surface of the lower support plate. The upper fixing parts 8 are circular ring structures used to install thicker pipes. The inner diameter of the ring is adapted to the outer diameter of the thicker pipe, which can radially limit the thicker pipe. The lower fixing parts are claw structures 10 used to install thinner pipes. The claws 10 can wrap around the thinner pipes circumferentially to prevent the pipes from shaking during transportation or welding.

[0041] Each lower fixing component has multiple clamping claws 10, which are circumferentially distributed. A mounting hole for fixing a thin tube is located at the center of the fixing component, with the diameters at both ends of the mounting hole being larger than the diameter at the center. The multiple circumferentially distributed clamping claws 10 apply clamping force from different angles outside the thin tube, stably fixing the thin tube in the center of the mounting hole. The larger diameters at both ends of the mounting hole facilitate insertion of the thin tube from both ends, while the narrower diameter in the center matches the outer diameter of the thin tube, and can accommodate thin tubes of different lengths.

[0042] Example 3

[0043] like Figures 1-8 As shown, this embodiment further improves the transmission and power structure of the coarse and fine tube butt welding equipment based on Embodiments 1 and 2, so as to achieve precise control of the movement of each component, as detailed below:

[0044] The upper conveyor belt 6 has an upper circular hole located in the middle of the upper fixed member 8, and the lower conveyor belt 7 has a lower circular hole located in the middle of the lower fixed member. When the lower punch 9 moves upward, it passes through the lower and upper circular holes in sequence, directly contacting and lifting the thin tube on the lower fixed member, thus driving the thin tube to move steadily upward. This avoids the conveyor belts obstructing the movement of the lower punch 9 and ensures the precise lifting position of the thin tube.

[0045] A lower linear push rod 11 is fixedly installed inside the welding body 1, and the lower stamping body 9 is fixed on the output shaft of the lower linear push rod 11. After receiving a control signal, the lower linear push rod 11 extends and retracts its output shaft in the vertical direction, driving the lower stamping body 9 to move up and down synchronously, realizing the precise lifting or resetting of the thin tube. Through the control accuracy of the linear push rod, the lifting height of the thin tube is ensured to meet the docking requirements.

[0046] An upper linear push rod is fixed inside the top plate 4 of the equipment, and the upper stamping body 5 is fixed on the output shaft of the upper linear push rod. After receiving the control signal, the output shaft of the upper linear push rod extends and retracts in the vertical direction, driving the upper stamping body 5 to move up and down synchronously. This can apply uniform pressure or release pressure to the top of the thin tube, ensuring uniform force during the tube flaring process and stable flaring effect.

[0047] A drive ring 13 is rotatably mounted at the bottom of the top plate 4. The drive ring 13 has teeth on its outer side, and the welding torch 3 is mounted at the bottom of the drive ring 13. A motor is fixed inside the top plate 4, and a drive gear 12 is fixed to the motor output shaft. The drive gear 12 meshes with the teeth on the outer side of the drive ring 13. After the motor starts, the output shaft drives the drive gear 12 to rotate. The drive gear 12 drives the drive ring 13 to rotate around the vertical axis through the meshing of the teeth. The welding torch 3 rotates synchronously with the drive ring 13, making circular motions around the joint of the thick and thin pipes to complete the ring welding, thus improving the welding quality and efficiency.

[0048] Working principle

[0049] This pipe butt welding equipment achieves efficient butt welding of pipes of different sizes through the coordinated operation of layered conveying, precise fixing, power-driven lifting and flaring, and automatic circumferential welding. The specific process is as follows:

[0050] The equipment constructs a stable two-layer support structure through an upper support plate and a lower support plate. The upper conveyor belt 6 is attached to the surface of the upper support plate, and the lower conveyor belt 7 is attached to the surface of the lower support plate, respectively carrying the thick and thin pipes to be transported in a fixed direction.

[0051] The annular upper fixing member 8 on the surface of the upper support plate radially limits the thick tube (the inner diameter of the annulus matches the outer diameter of the thick tube). The circumferentially distributed claws 10 (lower fixing members) on the surface of the lower support plate wrap around the thin tube from multiple angles. At the same time, the thin tube is inserted into the mounting hole in the center of the claw 10 (the diameters at both ends are large and the diameter in the middle is small). With the help of the narrow diameter in the middle of the mounting hole and the clamping force of the claw 10, the thin tube is stably fixed. In addition, the rubber claw 10 (the inner ring surface is a wide arc surface at the top and narrow arc surface at the bottom, and the minimum diameter is smaller than the outer diameter of the thin tube) further wraps around the thin tube through its own elasticity to avoid scratching the surface of the tube during transportation.

[0052] The upper conveyor belt 6 has an upper round hole in the middle of the upper fixing part 8, and the lower conveyor belt 7 has a lower round hole in the middle of the lower fixing part, which are reserved channels for the movement of the lower stamping body 9.

[0053] After receiving the control signal, the lower linear push rod 11 inside the welding body 1 extends the output shaft vertically, driving the lower stamping body 9 fixed at the shaft end to move upward. It passes through the lower round hole and the upper round hole in sequence, directly lifting the thin tube on the lower fixed part, so that the thin tube rises along the vertically arranged moving channel, passes through the second conveying channel and the first conveying channel in sequence, and is inserted into the thick tube until it extends to the top, completing the initial docking of the thick and thin tubes.

[0054] The end of the lower stamping body 9 is designed as an arc-shaped ring that is narrow at the top and wide at the bottom. After the thin tube is lifted into place...

[0055] The upper linear push rod inside the top plate 4 drives the output shaft to extend, causing the upper stamping body 5 to move downward and apply uniform pressure to the top of the thin tube.

[0056] Under pressure, the thin tube is pressed downward to fit the arc-shaped ring of the lower stamping body 9. The arc surface of the wide end of the arc ring contacts the inner wall of the thin tube and pushes the end of the thin tube outward until the outer diameter of the thin tube after flaring is completely matched with the outer diameter of the thick tube, ensuring a tight fit at the joint.

[0057] The drive ring 13, which is rotatably mounted at the bottom of the top plate 4, has teeth on its outer side. After the motor inside the top plate 4 is started, the output shaft drives the drive gear 12 to rotate. The drive gear 12 rotates around the vertical axis by meshing with the drive ring 13 through the teeth.

[0058] The welding torch 3 is fixed at the bottom of the drive ring 13 and rotates synchronously with the drive ring 13, making a circular motion around the joint of the thick and thin pipes to achieve uniform welding of the entire circumference of the joint surface and complete the entire welding process. After the welding is completed, each component (upper stamping body 5, lower stamping body 9, conveyor belt) is reset and waits for the next set of pipes to be transported.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A butt welding device for coarse and fine tubes, characterized in that, include: A welding body (1) is provided with a welding torch (3) which is capable of rotating around a pivot. The conveyor line (2) passes through the interior of the welded body (1). The conveyor line (2) includes a first conveyor channel and a second conveyor channel arranged vertically. The interior of the first conveyor channel is provided with an upper conveyor belt (6) for conveying thick tubes, and the interior of the second conveyor channel is provided with a lower conveyor belt (7) for conveying thin tubes. The welding body (1) is equipped with a moving channel that passes through the conveyor line (2). The moving channel is arranged vertically. The welding body (1) is equipped with a lower punch (9) that moves up and down. The end of the lower punch (9) is an arc-shaped ring that is narrow at the top and wide at the bottom. When the lower punch (9) moves upward from the bottom, it can drive the thin tube at the bottom to pass through the first conveyor channel and the thick tube to the top. The welding body (1) is equipped with an upper punch (5). The upper punch (5) can apply pressure to the thin tube. The lower punch (9) is provided with an arc surface. When the upper punch (5) applies pressure to the thin tube, the arc surface on the lower punch (9) expands the end of the thin tube close to the thick tube to match the outer diameter of the thick tube. The welding torch (3) welds the thick tube and the thin tube.

2. The butt welding equipment for coarse and fine tubes according to claim 1, characterized in that, The conveyor line (2) includes an upper support plate and a lower support plate. The upper conveyor belt (6) moves on the surface of the upper support plate, and the lower conveyor belt (7) moves on the surface of the lower support plate.

3. The butt welding equipment for coarse and fine tubes according to claim 2, characterized in that, The upper support plate is equipped with a plurality of evenly arranged upper fixing parts (8), and the lower support plate is equipped with a plurality of evenly arranged lower fixing parts. The upper fixing part (8) is a ring for installing a thick tube, and the lower fixing part is a claw (10) for installing a thin tube.

4. The butt welding equipment for coarse and fine tubes according to claim 3, characterized in that, Each of the lower fixing members has multiple claws (10), and the multiple claws (10) are distributed circumferentially, with the center of the claw (10) being the mounting hole for fixing the thin tube.

5. The butt welding equipment for coarse and fine tubes according to claim 1, characterized in that, The upper conveyor belt (6) has an upper circular hole in the middle of the upper fixing member (8), and the lower conveyor belt (7) has a lower circular hole in the middle of the lower fixing member. When the lower stamping body (9) moves upward, it will pass through the upper circular hole and the lower circular hole in sequence.

6. The butt welding equipment for coarse and fine tubes according to claim 1, characterized in that, The welded body (1) has a lower linear push rod (11) fixedly installed inside, and the lower stamping body (9) is fixed on the output shaft of the lower linear push rod (11).

7. The butt welding equipment for coarse and fine tubes according to claim 6, characterized in that, A top plate (4) is installed on the welded body (1), and an upper linear push rod is fixed inside the top plate (4). The upper stamping body (5) is fixed on the output shaft of the upper linear push rod.

8. The butt welding equipment for coarse and fine tubes according to claim 7, characterized in that, A drive ring (13) is rotatably mounted on the bottom of the top plate (4). The drive ring (13) has teeth on its outer side. The welding torch (3) is mounted on the bottom of the drive ring (13). A motor is fixed inside the top plate (4). A drive gear (12) is fixed on the output shaft of the motor. The drive gear (12) meshes with the teeth on the gear ring.

9. The butt welding equipment for coarse and fine tubes according to claim 3, characterized in that, The inner ring surface of the claw (10) is an arc surface, which is wider at the top and narrower at the bottom, and the minimum diameter of the arc surface is smaller than the outer diameter of the thin tube. The material of the claw (10) is rubber.

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