Welding device for seamless steel pipe machining

Abstract

The invention discloses a welding device for seamless steel pipe machining, and relates to the technical field of steel pipe welding. Comprising a welding installation part, and a rotating device is installed on the welding installation part and used for rotating and adjusting the welding position; two welding gun butt joint pieces are mounted on the rotating device; the two welding gun butt joint pieces are used for being inserted into a welding gun for symmetrical welding. A lining plate stabilizing piece is mounted on the rotating device; the lining plate stabilizing piece is positioned at the welding seam; an in-pipe molten pool forming piece is arranged on the inner side of the welding installation piece. The two in-pipe molten pool forming pieces which can be in magnetic attraction butt joint are adopted, two ceramic lining rings can be conveniently spliced into a complete inner weld joint lining after being attached to each other, and the forming quality of the inner side of a weld joint can be effectively guaranteed; the problem that according to an existing welding device for seamless steel pipe machining, the forming quality of a welding path in a pipe cannot be conveniently limited through a movable magnetic attraction lining is solved.

Description

Technical Field

[0001] This invention relates to the field of steel pipe welding technology, specifically to a welding apparatus for processing seamless steel pipes. Background Technology

[0002] Seamless steel pipes are made by piercing a single round steel bar, resulting in a hollow cross-section and a seamless surface. They are widely used in petroleum, chemical, and machinery manufacturing industries. In the actual production of seamless steel pipes, lengthening welding is often required, necessitating quality control. Current welding equipment for seamless steel pipe processing typically requires double-sided welding. However, the narrow circular space inside long steel pipes makes it difficult to attach inner lining tiles, hindering the use of movable magnetic linings to restrict the weld formation quality. Traditional tile-attaching methods also make it difficult to confirm tile installation accuracy, making it inconvenient for workers to maintain symmetrical weld movement during welding. This can easily cause thermal deformation of the steel pipe, affecting welding accuracy.

[0003] Therefore, we propose a welding device for seamless steel pipe processing. Summary of the Invention

[0004] The purpose of this invention is to provide a welding apparatus for seamless steel pipe processing, so as to solve the problem mentioned in the background art that the current welding apparatus for seamless steel pipe processing is not convenient to limit the quality of weld formation inside the pipe by using a movable magnetic liner.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding device for seamless steel pipe processing, comprising a welding mounting component, a rotary device mounted on the welding mounting component, the rotary device being used for rotating and adjusting the welding position; two welding torch butt joints mounted on the rotary device; the two welding torch butt joints being used for symmetrical welding by inserting welding torches; a liner plate stabilizing component mounted on the rotary device; the liner plate stabilizing component being located at the weld seam; an inner molten pool forming component being provided on the inner side of the welding mounting component; the inner molten pool forming component being used for forming the inner wall weld path; the welding mounting component comprising: a welding mounting cylinder and a drive motor, the drive motor being fixedly mounted on the welding mounting cylinder via a bracket; the welding mounting cylinder being used to sleeve onto the seamless steel pipe to be welded; a gear being fixedly mounted on the output shaft of the drive motor.

[0006] Preferably, the welding mounting component further includes: positioning bolts, six positioning bolts are threadedly connected to the welding mounting cylinder, and each of the six positioning bolts has a handwheel at its end; the positioning bolts are used to press and fit against the outside of the seamless steel pipe to be welded.

[0007] Preferably, the rotating device includes: a rotating mounting ring, a rotary mounting ring, and an indicator light. The rotating mounting ring is rotatably mounted on the welding mounting cylinder. The rotary mounting ring is fixedly mounted on the rotating mounting ring by bolts. A ring of meshing teeth is provided on the outer side of the rotary mounting ring. The gear on the output shaft of the drive motor meshes with the rotary mounting ring. The rotary mounting ring is attached to the welding mounting cylinder. An indicator light is fixedly mounted on the rotating mounting ring. The rotating mounting ring has two through grooves for aligning weld seams.

[0008] Preferably, the welding torch connector includes: a welding mounting plate, a ball socket, and a switch retaining ring. Two welding mounting plates are fixedly mounted on the welding mounting cylinder by bolts. A ball socket is fitted onto each of the two welding mounting plates. Each of the two ball sockets has a through hole. A switch retaining ring is fixedly mounted on each of the two ball sockets. The ball socket is used for rotational adjustment on the welding mounting plate.

[0009] Preferably, the welding torch docking component further includes: a welding torch sleeve, a switch mounting ring, and a docking switch. Two welding torch sleeves are slidably fitted onto the two socket balls, and springs are fitted onto the two welding torch sleeves. The springs fitted onto the two welding torch sleeves are respectively connected between the welding torch sleeve and the socket balls. Switch mounting rings are fixedly installed on the two welding torch sleeves, and the switch mounting rings are located on one side of the switch retaining ring. A docking switch is fixedly installed on the two switch mounting rings. The ends of the two docking switches are respectively pressed and fitted against the switch retaining ring on the same side. Welding torches are respectively inserted into the two welding torch sleeves. The two docking switches are connected in series with the welding torch power supplies inserted into the two welding torch sleeves.

[0010] Preferably, the liner stabilizer includes: a pressure post, a movable contact ring, and a slotted head. The pressure post is slidably inserted into the inner side of the rotating mounting ring. The movable contact ring is fixedly installed on the pressure post. A spring is sleeved on the inner side of the rotating mounting ring, and the spring on the inner side of the rotating mounting ring is connected between the pressure post and the inner side of the rotating mounting ring. A slotted head is fixedly installed at the bottom of the pressure post, and the bottom of the slotted head has a beveled structure. The slotted head is located inside the weld.

[0011] Preferably, the liner stabilizer further includes: a fixed contact ring, wherein a fixed contact ring is fixedly installed inside the rotating mounting ring; the fixed contact ring and the movable contact ring are in contact; and the fixed contact ring, the movable contact ring, and the indicator light are connected in series with a power supply.

[0012] Preferably, the in-tube molten pool forming component includes: retaining columns, ball bearings, and ceramic inner liner rings. Two retaining columns are provided, each with two rings of ball bearings embedded in it. The ball bearings are used to roll and adhere to the inner side of the seamless steel pipe to be welded. Ceramic inner liner rings are fixedly sleeved at the ends of the two retaining columns, and each ceramic inner liner ring has an arc-shaped groove at its end. The arc-shaped grooves at the ends of the two ceramic inner liner rings are attached to the insertion head. The ceramic inner liner rings are used to assist in forming the arc-shaped inner weld seam.

[0013] Preferably, the in-tube molten pool forming component further includes: magnets and traction ropes, with magnets fixedly embedded on the two retention columns respectively; the two magnets are used to attract each other magnetically; traction ropes are fixedly installed on the two retention columns respectively, and the two traction ropes are used to pass through the seamless steel pipe to be welded.

[0014] Preferably, the in-tube molten pool forming component further includes: a positioning switch, wherein a positioning switch is fixedly installed at the end of the right-side retention column, and the end of the positioning switch is pressed against the opposite side retention column; the positioning switch is electrically connected to the welding gun power supply inserted on the two welding gun sleeves.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention employs welding mounting components and a rotating device, facilitating uniform speed driving during welding operations and avoiding the problem of inconsistent movement speeds during manual hand-held welding. Furthermore, the welding torch docking component automatically detects the positioning of the two welding torches, enabling symmetrical stress balancing during seamless steel pipe welding. This effectively reduces deformation caused by unilateral welding, improves welding quality, and does not compromise welding flexibility.

[0016] The design employs two magnetically connected molten pool forming components within the pipe, facilitating the attachment and splicing of two ceramic inner liners to form a complete inner weld liner. This effectively ensures the forming quality of the inner side of the weld. Furthermore, this structure is particularly suitable for forming double-sided welds on long pipes. The two ceramic inner liners can be quickly removed after weld formation without being obstructed by the molten pool. Combined with a liner plate stabilizer, the ceramic inner liners can be positioned, maintaining alignment with the weld and ensuring the forming quality of the arc-shaped inner weld. The arc-shaped insertion head prevents jamming and allows for natural sliding after weld formation without affecting normal welding, eliminating the need for tedious manual adjustments. The use of fixed and movable contact coils facilitates the inspection of the structure's installation accuracy, providing direct feedback to workers.

[0017] Using a positioning switch can further ensure that welding is carried out only when the two ceramic inner rings are completely merged to form an arc-shaped inner lining groove, thus ensuring the installation accuracy of the ceramic inner rings. This can further ensure the quality of the inner weld pool formation during actual pipe welding and avoid factors such as flash caused by gaps between the two ceramic inner rings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a welding device for seamless steel pipe processing installed behind a seamless steel pipe according to the present invention; Figure 2 This is a schematic diagram of the overall structure of a welding device for seamless steel pipe processing according to the present invention; Figure 3 This is a cross-sectional view of the internal structure of a welding device for seamless steel pipe processing according to the present invention; Figure 4 This is a schematic diagram of the welding installation component structure of the present invention; Figure 5 This is a schematic diagram of the rotating device structure of the present invention; Figure 6 This is a schematic diagram of the welding gun butt joint structure of the present invention; Figure 7 For the present invention Figure 3 Enlarged view of the structure of the middle F region; Figure 8 For the present invention Figure 5 Enlarged view of the structure of the G region; Figure 9 This is a schematic diagram of the structure of the in-tube molten pool forming part of the present invention; Figure 10 This is a schematic diagram showing the installation position of the position switch of the present invention.

[0019] In the diagram: 1. Welding installation component; 101. Welding installation cylinder; 102. Drive motor; 103. Positioning bolt; 2. Rotation device; 201. Rotating installation ring; 202. Rotating installation ring; 203. Indicator light; 3. Welding torch docking component; 301. Welding installation plate; 302. Connecting ball; 3021. Switch retaining ring; 303. Welding torch sleeve; 304. Switch mounting ring; 305. Docking switch; 4. Liner plate stabilizer; 401. Downward pressure column; 4011. Movable electrical contact ring; 402. Insertion head; 403. Fixed electrical contact ring; 5. In-pipe molten pool forming component; 501. Retention column; 5011. Ball bearing; 502. Ceramic inner lining ring; 503. Magnet; 504. Traction rope; 505. Position switch. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1 to 10 As shown: This invention provides a technical solution: a welding device for seamless steel pipe processing, comprising a welding mounting component 1, a rotary device 2 mounted on the welding mounting component 1 for adjusting the welding position by rotation; two welding torch docking parts 3 mounted on the rotary device 2; the two welding torch docking parts 3 are respectively used for symmetrical welding by inserting welding torches; a liner plate stabilizer 4 mounted on the rotary device 2; the liner plate stabilizer 4 is located at the weld seam; an inner molten pool forming part 5 is provided on the inner side of the welding mounting component 1; the inner molten pool forming part 5 is used to form the inner wall weld path; the welding mounting component 1 includes: a welding mounting cylinder 101 and a drive motor 102, the drive motor 102 is fixedly mounted on the welding mounting cylinder 101 by a bracket; the welding mounting cylinder 101 is used to fit onto the seamless steel pipe to be welded; a gear is fixedly mounted on the output shaft of the drive motor 102.

[0022] The welding mounting component 1 further includes: positioning bolts 103, six positioning bolts 103 are threadedly connected to the welding mounting cylinder 101, and each of the six positioning bolts 103 has a handwheel at its end; the positioning bolts 103 are used to press and fit against the outside of the seamless steel pipe to be welded; the rotating device 2 includes: a rotating mounting ring 201, a rotary mounting ring 202, and an indicator light 203, the rotating mounting ring 201 is rotatably mounted on the welding mounting cylinder 101; the rotary mounting ring 201 is fixedly mounted on the rotating mounting ring 201 by bolts. Ring 202; a ring of meshing teeth is provided on the outer side of the rotating mounting ring 202; the gear on the output shaft of the drive motor 102 meshes with the rotating mounting ring 202; the rotating mounting ring 202 is attached to the welding mounting cylinder 101; an indicator light 203 is fixedly installed on the rotating mounting ring 201; two through slots for aligning weld seams are provided on the rotating mounting ring 201; the welding torch docking part 3 includes: a welding mounting plate 301, a socket ball 302, and a switch retaining ring 3021; ​​two welding torches are fixedly installed on the welding mounting cylinder 101 by bolts. Mounting plate 301; two welding mounting plates 301 are respectively fitted with socket balls 302; each of the two socket balls 302 is provided with a through hole; each of the two socket balls 302 is fixedly mounted with a switch retaining ring 3021; ​​the socket balls 302 are used for rotational adjustment on the welding mounting plates 301; the welding torch docking component 3 also includes: a welding torch sleeve 303, a switch mounting ring 304, and a docking switch 305, the welding torch sleeve 303 is slidably fitted on each of the two socket balls 302, and each of the two welding torch sleeves 303 is respectively Springs are fitted onto the two welding torch sleeves 303, which are respectively connected between the welding torch sleeve 303 and the ball 302; switch mounting rings 304 are fixedly installed on the two welding torch sleeves 303, and the switch mounting rings 304 are located on one side of the switch retaining ring 3021; ​​docking switches 305 are fixedly installed on the two switch mounting rings 304; the ends of the two docking switches 305 are respectively pressed and adhered to the switch retaining ring 3021 on the same side; welding torches are respectively inserted into the two welding torch sleeves 303.Two docking switches 305 are connected in series with the welding torch power supplies plugged into the two welding torch sleeves 303. Using welding mounting parts 1 and a rotating device 2, the welding operation is driven at a uniform speed, avoiding the problem of inconsistent movement speeds during manual welding. Simultaneously, the welding torch docking parts 3 can automatically detect the positioning of the two welding torches, limiting symmetrical stress balance during seamless steel pipe welding. This effectively reduces deformation caused by unilateral welding. Continuous unilateral welding leads to localized high-temperature concentration, uneven heating of the steel pipe, and asymmetrical shrinkage stress, easily causing bending or torsional deformation. This structure effectively improves welding quality without affecting welding flexibility. Two workers press down on the two welding torches, pushing the welding torch sleeves 303 downwards. At this time, the springs on the welding torch sleeves 303 are compressed, causing the docking switches 305 to stop pressing the switch retaining ring 3021. Only then can the welding torch power supplies plugged into the two welding torch sleeves 303 be energized, controlling the welding torch switches plugged into the two welding torch sleeves 303 to perform synchronous welding work, maintaining symmetrical simultaneous welding with both welding torches.

[0023] The liner stabilizer 4 includes: a downward pressure column 401, a movable electrical contact ring 4011, and a slotted head 402. The downward pressure column 401 is slidably inserted into the inner side of the rotating mounting ring 201. The movable electrical contact ring 4011 is fixedly installed on the downward pressure column 401. A spring is sleeved on the inner side of the rotating mounting ring 201, and the spring on the inner side of the rotating mounting ring 201 is connected between the downward pressure column 401 and the inner side of the rotating mounting ring 201. The slotted head 402 is fixedly installed at the bottom of the downward pressure column 401, and the bottom of the slotted head 402 has a beveled structure. The slotted head 402 is located inside the weld. The liner stabilizer 4 also includes: a fixed electrical contact ring 403, which is fixedly installed on the inner side of the rotating mounting ring 201. The fixed electrical contact ring 403 and the movable electrical contact ring 4011 are in contact. 403. A movable contact coil 4011 and an indicator light 203 are connected in series with a power supply; the pipe-in-the-wall molten pool forming component 5 includes: a retaining post 501, a ball bearing 5011, and a ceramic inner liner 502. Two retaining posts 501 are provided, and two balls bearing 5011 are embedded in each of the two retaining posts 501. The balls bearing 5011 are used to roll and adhere to the inner side of the seamless steel pipe to be welded; ceramic inner liners 502 are fixedly sleeved at the ends of the two retaining posts 501, and the ends of the two ceramic inner liners 502 are respectively provided with arc-shaped grooves; the arc-shaped grooves at the ends of the two ceramic inner liners 502 are attached to the insertion head 402; the ceramic inner liners 502 are used to assist in forming an arc-shaped inner weld; the pipe-in-the-wall molten pool forming component 5 also includes: a magnet 503 and a traction rope 504. Magnets are fixedly embedded in the two retaining posts 501. Iron 503; two magnets 503 for mutual magnetic attraction; traction ropes 504 are fixedly installed on two retaining columns 501 respectively, and the two traction ropes 504 are used to pass through the seamless steel pipe to be welded. Two magnetically abutting pipe-mounted molten pool forming parts 5 are used, which facilitates the splicing of two ceramic inner liner rings 502 into a complete inner weld liner after they are attached together, effectively ensuring the forming quality of the inner side of the weld. This structure is also more suitable for forming double-sided welds on long pipes. The structure is simple to operate, and the two ceramic inner liner rings 502 can be quickly removed after the weld is formed without being blocked by the inner weld molten pool, making the structure more flexible. In conjunction with the liner plate stabilizer 4, the ceramic inner liner rings 502 can be positioned, keeping the two ceramic inner liner rings 502 aligned with the weld, ensuring the arc shape. To ensure the quality of the inner weld formation, the arc-shaped insertion head 402 prevents jamming. After the weld is formed, it can slide naturally without affecting normal welding, eliminating the need for tedious manual adjustments. Combined with the fixed contact ring 403 and the movable contact ring 4011, it facilitates the inspection of the structure's installation accuracy and directly informs the workers. The insertion head 402 is inserted into the weld seam, and its end also inserts into the arc-shaped groove between the two ceramic inner rings 502, further limiting their position. As welding progresses, the weld pool fills the arc-shaped groove between the two ceramic inner rings 502. After cooling, this also helps to limit the position of the two ceramic inner rings 502.

[0024] In Example 2, based on Example 1, the inner weld pool forming component 5 further includes: a positioning switch 505. A positioning switch 505 is fixedly installed at the end of the right-side retaining column 501, and the end of the positioning switch 505 is pressed against the opposite retaining column 501. The positioning switch 505 is electrically connected to the welding gun power supply inserted into the two welding gun sleeves 303. The use of the positioning switch 505 can further ensure that the welding work is carried out only when the two ceramic inner lining rings 502 are completely merged to form an arc-shaped inner lining groove. This can further ensure the quality of the inner weld pool forming during the actual welding of the pipe fitting, avoid the formation of flash due to the gap between the two ceramic inner lining rings 502, and also avoid direct manual welding operations, thus improving the welding process quality and affecting the welding quality. The detection of this structure is simple and direct.

[0025] The working principle of this embodiment is as follows: First, before welding, two retaining posts 501 are inserted into two steel pipes to be welded, respectively. The ball bearings 5011 reduce insertion resistance. When the two retaining posts 501 are magnetically joined, if there are iron filings blocking the contact or if the ends of the two seamless steel pipes are deformed, preventing the two retaining posts 501 from fully adhering under the magnetic attraction of the magnet 503, the two ceramic inner liner rings 502 also cannot fully adhere. The positioning switch 505 cannot be fully compressed. At this time, the welding gun power supply connected to the two welding gun sleeves 303 cannot be energized. It is necessary to promptly clean the iron filings or check the deformation of the ends of the seamless steel pipes to ensure the two retaining posts... Only when switches 501 and 505 are fully pressed together can subsequent welding operations proceed normally. After the two retaining posts 501 are inserted into the two steel pipes to be welded, the magnets 503 are used to magnetically pull them together, keeping them in contact. At this time, the two ceramic inner lining rings 502 will also be in contact. Place the two seamless steel pipes to be welded on the existing welding support. After the welding installation cylinder 101 is inserted into the seamless steel pipe, the welding torch sleeve 303 is aligned with the weld seam, and then the positioning bolts 103 are tightened. When welding is required, the drive motor 102 drives the rotating installation ring 202, which in turn drives the rotating installation ring 201 to rotate. Then, the two workers can press down on the two welding torches respectively, pushing the welding torch sleeve. 303 moves downward, at which point the spring on the welding torch sleeve 303 is compressed, causing the docking switch 305 to stop pressing the switch retaining ring 3021. Only then can the welding torch power supplies plugged into the two welding torch sleeves 303 be energized, controlling the welding torch switches plugged into the two welding torch sleeves 303 to perform synchronous welding work, maintaining symmetrical simultaneous welding with both welding torches. Simultaneously, the socket ball 302, fitted onto the welding mounting plate 301, ensures flexible swinging of the welding torch, guaranteeing a thorough weld base. The insertion head 402 is inserted into the weld seam, with its end also inserted into the arc-shaped groove between the two ceramic inner rings 502, further restricting the position of the two ceramic inner rings 502. As the welding torch welding progresses, the weld pool... The inner side will be filled with the arc-shaped groove between the two ceramic inner rings 502. After the arc-shaped groove between the two ceramic inner rings 502 is filled and cooled, it will also play a role in limiting the two ceramic inner rings 502. Therefore, it is no longer necessary to limit the two ceramic inner rings 502 by the insertion head 402. At this time, as the rotating mounting ring 201 rotates, it will also drive the insertion head 402 to move together. When the insertion head 402 touches the already formed weld pool, it can slide directly over the weld pool using the inclined structure at the bottom of the insertion head 402 without causing jamming. With the help of the spring above the pressure column 401, compression can be achieved, and the insertion head 402 can move upward and retract without affecting the normal welding process. Before welding, the rotating mounting ring 201 can be rotated one full turn, which will also move the insertion head 402. Under the pressure of the upper spring, the lower pressure column 401 keeps the insertion head 402 attached to the ceramic inner liner ring 502. Once the gap between the ceramic inner liner ring 502 and the inner wall of the seamless steel pipe exceeds the standard due to wear or other problems, it will no longer be coaxial. Under the pressure of the upper spring, the lower pressure column 401 will slide within the rotating mounting ring 201. The fixed electrical contact ring 403 will then be misaligned with the movable electrical contact ring 4011 and will no longer be attached. The circuit will not be able to conduct, and the indicator light 203 will be turned off as a warning.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding device for processing seamless steel pipes, comprising a welding mounting component (1), wherein a rotating device (2) is mounted on the welding mounting component (1), characterized in that: The rotary device (2) is used to adjust the welding position by rotation; two welding gun docking parts (3) are installed on the rotary device (2); the two welding gun docking parts (3) are used to insert the welding gun for symmetrical welding. A liner stabilizer (4) is installed on the rotary device (2); the liner stabilizer (4) is located at the weld. The welding installation component (1) has an inner molten pool forming component (5) on its inner side; the inner molten pool forming component (5) is used to form the inner wall weld path; The welding mounting component (1) includes a welding mounting cylinder (101) and a drive motor (102). The drive motor (102) is fixedly mounted on the welding mounting cylinder (101) by a bracket. The welding mounting cylinder (101) is used to fit onto the seamless steel pipe to be welded. A gear is fixedly mounted on the output shaft of the drive motor (102).

2. The welding apparatus for seamless steel pipe processing according to claim 1, characterized in that: The welding mounting component (1) further includes: positioning bolts (103), six positioning bolts (103) are threadedly connected to the welding mounting cylinder (101), and each of the six positioning bolts (103) is provided with a handwheel at its end; the positioning bolts (103) are used to press and fit against the outside of the seamless steel pipe to be welded.

3. The welding apparatus for seamless steel pipe processing according to claim 1, characterized in that: The rotating device (2) includes: a rotating mounting ring (201), a rotating mounting ring (202), and an indicator light (203). The rotating mounting ring (201) is rotatably mounted on the welding mounting cylinder (101). The rotating mounting ring (202) is fixedly mounted on the rotating mounting ring (201) by bolts. A ring of meshing teeth is provided on the outer side of the rotating mounting ring (202). The gear on the output shaft of the drive motor (102) meshes with the rotating mounting ring (202). The rotating mounting ring (202) is attached to the welding mounting cylinder (101). The indicator light (203) is fixedly mounted on the rotating mounting ring (201). The rotating mounting ring (201) is provided with two through slots for aligning weld seams.

4. The welding apparatus for seamless steel pipe processing according to claim 3, characterized in that: The welding torch docking component (3) includes: a welding mounting plate (301), a socket ball (302), and a switch retaining ring (3021). Two welding mounting plates (301) are fixedly mounted on the welding mounting cylinder (101) by bolts. A socket ball (302) is sleeved on each of the two welding mounting plates (301). A through hole is provided on each of the two socket balls (302). A switch retaining ring (3021) is fixedly mounted on each of the two socket balls (302). The socket ball (302) is used to rotate and adjust on the welding mounting plate (301).

5. The welding apparatus for seamless steel pipe processing according to claim 4, characterized in that: The welding torch docking component (3) further includes: a welding torch sleeve (303), a switch mounting ring (304), and a docking switch (305). The welding torch sleeves (303) are slidably fitted onto the two connecting balls (302), and springs are fitted onto the two welding torch sleeves (303). The springs fitted onto the two welding torch sleeves (303) are respectively connected between the welding torch sleeves (303) and the connecting balls (302). Switches are fixedly installed on the two welding torch sleeves (303). The mounting ring (304) is located on one side of the switch retaining ring (3021); two switch mounting rings (304) are respectively fixedly mounted with docking switches (305); the ends of the two docking switches (305) are respectively pressed and attached to the switch retaining ring (3021) on the same side; two welding gun sleeves (303) are respectively used to insert welding guns; the two docking switches (305) are respectively connected in series with the welding gun power supplies inserted on the two welding gun sleeves (303).

6. The welding apparatus for seamless steel pipe processing according to claim 5, characterized in that: The liner stabilizer (4) includes: a pressure post (401), a movable contact ring (4011), and a slotted head (402). The pressure post (401) is slidably inserted into the inner side of the rotating mounting ring (201). The movable contact ring (4011) is fixedly installed on the pressure post (401). A spring is sleeved on the inner side of the rotating mounting ring (201), and the spring on the inner side of the rotating mounting ring (201) is connected between the pressure post (401) and the inner side of the rotating mounting ring (201). The slotted head (402) is fixedly installed at the bottom of the pressure post (401), and the bottom of the slotted head (402) is a sloping structure. The slotted head (402) is located inside the weld.

7. The welding apparatus for seamless steel pipe processing according to claim 6, characterized in that: The liner stabilizer (4) further includes: a fixed power contact ring (403), which is fixedly installed on the inner side of the rotating mounting ring (201); the fixed power contact ring (403) and the movable power contact ring (4011) are in contact; the fixed power contact ring (403), the movable power contact ring (4011) and the indicator light (203) are connected in series with a power supply.

8. The welding apparatus for seamless steel pipe processing according to claim 6, characterized in that: The in-tube molten pool forming component (5) includes: a retaining post (501), a ball bearing (5011), and a ceramic inner liner (502). There are two retaining posts (501), and two balls bearing (5011) are embedded on each of the two retaining posts (501). The balls bearing (5011) are used to roll and fit against the inside of the seamless steel pipe to be welded. The ends of the two retaining posts (501) are respectively fixedly sleeved with ceramic inner liner (502), and the ends of the two ceramic inner liner (502) are respectively provided with arc-shaped grooves. The arc-shaped grooves at the ends of the two ceramic inner liner (502) are attached to the insertion head (402). The ceramic inner liner (502) is used to assist in forming an arc-shaped inner weld.

9. A welding apparatus for seamless steel pipe processing according to claim 8, characterized in that: The in-tube molten pool forming component (5) further includes: a magnet (503) and a traction rope (504). The magnet (503) is fixedly embedded on the two retention columns (501); the two magnets (503) are used to attract each other magnetically; the traction rope (504) is fixedly installed on the two retention columns (501), and the two traction ropes (504) are used to pass through the seamless steel pipe to be welded.

10. A welding apparatus for seamless steel pipe processing according to claim 9, characterized in that: The in-tube molten pool forming component (5) further includes: a positioning switch (505), a ring of positioning switches (505) is fixedly installed at the end of the right-side retention column (501), and the end of the ring of positioning switches (505) is pressed and attached to the opposite side retention column (501); the ring of positioning switches (505) is electrically connected to the welding gun power supply inserted on the two welding gun sleeves (303).

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