Angle-adjustable stainless steel pipe butt welding device

Abstract

The invention discloses an angle-adjustable stainless steel pipe butt welding device, and relates to the technical field of steel pipe welding, the angle-adjustable stainless steel pipe butt welding device comprises a base, the top end of the base is symmetrically and fixedly connected with a plurality of linearly arranged supporting seats, the top ends of the supporting seats are rotatably connected with supporting discs, and the supporting discs are used for supporting pipe bodies; the device further comprises a positioning mechanism and a moving mechanism. According to the welding device, the positioning mechanism and the moving mechanism are arranged, the position of the moving frame is adjusted, two welding heads are located at the connecting position of two pipe bodies, then the position of the moving frame is fixed, a second motor operates to drive a mounting base to move, and the mounting base moves to drive the welding heads to move; the two welding heads move to make contact with the inner cavity and the outer wall of the pipe body correspondingly, meanwhile, the first motor operates to drive the pipe body to rotate, the angle of the pipe body is adjusted, when the pipe body rotates, the welding heads synchronously conduct welding operation on the inner cavity and the outer wall of the pipe body at the same time, and welding operation on the opposite opening of the pipe body is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe welding, and specifically relates to a stainless steel pipe butt welding device with adjustable angle. Background Art

[0002] When welding the butt joints of large stainless steel pipes, it is usually necessary to weld the outside of the steel pipe first and then weld the inside of the steel pipe. Moreover, the steel pipe is large in size, and the operator moves along the outer wall of the steel pipe for welding, and the operation is relatively complicated. In order to achieve the purpose of facilitating the synchronous welding of the inner and outer walls of the stainless steel pipe, a stainless steel pipe butt welding device with adjustable angle is provided. Summary of the Invention

[0003] The purpose of the present invention is to provide a stainless steel pipe butt welding device with adjustable angle in order to achieve the purpose of facilitating the synchronous welding of the inner and outer walls of the stainless steel pipe.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A stainless steel pipe butt welding device with adjustable angle, including a base, a plurality of linearly arranged support seats are symmetrically and fixedly connected to the top end of the base, a support disc is rotatably connected to the top end of the support seat, the support disc is used for supporting the pipe body, the support discs on one side are fixedly connected by a connecting shaft, a first motor is installed on the outer wall of the support seat, the connecting shaft is connected to the output end of the first motor, the two pipe bodies are welded by a welding head, the position of the welding head is adjusted by a positioning mechanism, and the welding head is driven by a moving mechanism to perform displacement for welding operation.

[0005] As a further scheme of the present invention: The positioning mechanism includes a movable groove, the movable groove is opened at the top end of the base, a movable seat is slidably connected to the inner wall of the movable groove, a first limiting rod penetrating through the movable seat is fixedly connected to the inner wall of the movable groove, a connecting groove is opened at the top end of the movable seat, a connecting seat is slidably connected to the inner wall of the connecting groove, a "C"-shaped moving frame is fixedly connected to the top end of the connecting seat, the welding head is arranged at one end of the moving frame, a sliding groove is opened in the inner cavity of the moving frame, telescopic rods are symmetrically and slidably connected to the inner wall of the sliding groove, a positioning wheel is rotatably connected to one end of the telescopic rod, a second limiting rod penetrating through the telescopic rod is fixedly connected to the inner wall of the sliding groove, a rotating disc is rotatably connected to the outer wall of the telescopic rod inside the moving frame, a guiding groove is opened on the outer wall of the rotating disc, and a guiding rod is fixedly connected to the outer wall of the telescopic rod, and the guiding rod is slidably connected to the inner wall of the guiding groove.

[0006] As a further solution of the present invention: the moving mechanism includes a mounting plate, the mounting plate is fixedly connected to the top of the moving frame, the interior of the moving frame is slidably connected to a displacement frame extending from the moving frame, the outer wall of the mounting plate is installed with a second motor, the output end of the second motor is connected to a first threaded rod, the first threaded rod passes through the displacement frame, one end of the displacement frame is fixedly connected to a push rod, one end of the moving frame is symmetrically slidably connected to a mounting seat, the welding head is installed on the outer wall of the mounting seat, the outer wall of the mounting seat is provided with an oblique groove, and the push rod is slidably connected to the inner wall of the oblique groove.

[0007] As a further solution of the present invention: the moving mechanism also includes a pushing block, which is slidably connected to the inside of the moving frame and extends out of the moving frame, a third spring is connected between the pushing block and the moving frame, one end of the pushing block is fixedly connected to the pushing frame, the pushing frame is located between the moving frame and the displacement frame, the interior of the movable seat is slidably connected to a first card block extending to the inner cavity of the connecting groove, the first card block is connected to the movable seat with a first spring, the interior of the movable seat is slidably connected to a second card block extending to the bottom end of the movable seat, and the second card block is connected to the movable seat A second spring is connected, a displacement groove is provided inside the movable seat, the first clamping block and the second clamping block both extend to the inner wall of the displacement groove, the inner wall of the displacement groove is slidably connected with the displacement seat, the outer wall of the movable seat is rotatably connected with a rotating block, one end of the rotating block is fixedly connected with a second threaded rod, the second threaded rod extends to the inside of the displacement seat, a plurality of reinforcement grooves are evenly distributed in an annular manner on the outer wall of the rotating block, a push plate is slidably connected to the inside of the movable seat above the second threaded rod, a fourth spring is connected between the push plate and the movable seat, and the bottom end of the push plate is fixedly connected with a reinforcement frame.

[0008] As a further solution of the present invention: the inner wall of the movable groove fits with the outer wall of the movable seat, the outer wall of the movable seat is provided with a first limiting hole, and the inner wall of the first limiting hole fits with the outer wall of the first limiting rod; the inner wall of the slide groove fits with the outer wall of the telescopic rod, the outer wall of the telescopic rod is provided with a second limiting hole, and the inner wall of the second limiting hole fits with the outer wall of the second limiting rod.

[0009] As a further solution of the present invention: two guide grooves are provided and distributed circumferentially on the outer wall of the rotating disk, and the inner wall of the guide groove is in contact with the outer wall of the guide rod.

[0010] As a further solution of the present invention: a first threaded hole is formed on an outer wall of the displacement frame, the first threaded hole matches the first threaded rod, and the outer wall of the push rod fits with the inner wall of the inclined groove.

[0011] As a further solution of the present invention: the outer wall of the connecting seat is in contact with the inner wall of the connecting groove, the outer wall of the connecting seat is provided with a first card slot, one end of the first card block is engaged with the first card slot, the bottom end of the movable groove is provided with a second card slot, one end of the second card block is engaged with the second card slot.

[0012] As a further solution of the present invention: the inner wall of the displacement groove fits with the outer wall of the displacement seat, the outer wall of the displacement seat is provided with a second threaded hole, and the second threaded hole matches with the second threaded rod.

[0013] As a further solution of the present invention: the bottom outer wall of the reinforcement frame is in contact with the inner wall of the reinforcement groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By setting a positioning mechanism and a moving mechanism, the position of the moving frame is adjusted so that the two welding heads are respectively located at the joint positions of the two pipe bodies. This symmetrical design can ensure the synchronous formation of the double-sided weld molten pool to avoid overheating on one side; then the position of the moving frame is fixed, and after completion, the second motor is operated to drive the mounting seat to move, and the displacement of the mounting seat drives the welding head to move, and the two welding heads move to contact the inner cavity and outer wall of the pipe body respectively, and at the same time, the first motor is operated to drive the pipe body to rotate, and the angle of the pipe body is adjusted. When the pipe body rotates, the welding head simultaneously performs welding operations on the inner cavity and outer wall of the pipe body, which is convenient for welding operations on the joints of the pipe body and improves working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the support plate of the present invention; Figure 3 It is a schematic diagram of the internal structure of the base of the present invention; Figure 4 It is a schematic diagram of the internal structure of the movable seat of the present invention; Figure 5 It is a schematic diagram of the installation of the rotating disk of the present invention; Figure 6 It is a schematic diagram of the split structure of the rotating disk and the guide rod of the present invention; Figure 7 It is a schematic diagram of the internal structure of the mobile rack of the present invention; Figure 8 It is a schematic diagram of the installation structure of the displacement seat of the present invention; Fig. 9 It is a schematic diagram of the matching structure of the reinforcement frame and the reinforcement groove of the present invention.

[0016] In the figure: 1, base; 2, support seat; 3, support plate; 4, tube body; 5, connecting shaft; 6, first motor; 7, positioning mechanism; 701, movable groove; 702, movable seat; 703, first limiting rod; 704, connecting groove; 705, connecting seat; 706, moving frame; 707, slide groove; 708, second limiting rod; 709, telescopic rod; 710, positioning wheel; 711, rotating plate; 712, guide groove; 713, guide rod; 8, moving mechanism; 801, mounting plate; 802, second motor ;803, first threaded rod;804, displacement frame;805, push rod;806, mounting seat;807, inclined groove;808, push block;809, third spring;810, push frame;811, first clamping block;812, first spring;813, second clamping block;814, second spring;815, displacement groove;816, displacement seat;817, second threaded rod;818, rotating block;819, reinforcement groove;820, push plate;821, fourth spring;822, reinforcement frame;9, welding head. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0019] See also Figures 1 to 9, in the embodiments of the present invention, an angle-adjustable stainless steel pipe butt welding device includes a base 1. A plurality of linearly arranged support seats 2 are symmetrically and fixedly connected to the top end of the base 1. A support disk 3 is rotatably connected to the top end of the support seat 2. The support disk 3 is used to support the pipe body 4. The support disks 3 on one side are fixedly connected through a connecting shaft 5. A first motor 6 is installed on the outer wall of the support seat 2. The connecting shaft 5 is connected to the output end of the first motor 6. The two pipe bodies 4 are welded through a welding head 9. The position of the welding head 9 is adjusted by a positioning mechanism 7. The welding head 9 is driven to displace through a moving mechanism 8 to perform the welding operation.

[0020] The positioning mechanism 7 includes a movable groove 701. The movable groove 701 is opened at the top end of the base 1. A movable seat 702 is slidably connected to the inner wall of the movable groove 701. A first limiting rod 703 penetrating through the movable seat 702 is fixedly connected to the inner wall of the movable groove 701. A connecting groove 704 is opened at the top end of the movable seat 702. A connecting seat 705 is slidably connected to the inner wall of the connecting groove 704. A "C"-shaped moving frame 706 is fixedly connected to the top end of the connecting seat 705. The welding head 9 is arranged at one end of the moving frame 706. A sliding groove 707 is opened in the inner cavity of the moving frame 706. Telescopic rods 709 are symmetrically and slidably connected to the inner wall of the sliding groove 707. One end of the telescopic rod 709 is rotatably connected to a positioning wheel 710. A second limiting rod 708 penetrating through the telescopic rod 709 is fixedly connected to the inner wall of the sliding groove 707. A rotating disk 711 is rotatably connected to the outer wall of the telescopic rod 709 inside the moving frame 706. A guiding groove 712 is opened on the outer wall of the rotating disk 711. A guiding rod 713 is fixedly connected to the outer wall of the telescopic rod 709. The guiding rod 713 is slidably connected to the inner wall of the guiding groove 712. It should be noted that the two cross arms of the "C"-shaped moving frame 706 and the two telescopic rods 709 are symmetrically arranged with respect to the central axis of the rotating disk 711.

[0021] In this embodiment: when welding the two pipe bodies 4, the two pipe bodies 4 are placed on the support disks 3 and aligned. Then, the movable seat 702 is pushed to move in the movable groove 701, and the connecting seat 705 moves in the connecting groove 704, so as to drive the moving frame 706 to move horizontally and vertically at the same time; meanwhile, the rotating disk 711 is driven to rotate, so that the guiding rod 713 slides in the guiding groove 712, thereby driving the two telescopic rods 709 to move synchronously and in opposite directions. The displacement of the telescopic rod 709 drives the displacement of the positioning wheel 710. The two positioning wheels 710 move synchronously and respectively contact the inner cavity and the outer wall of the pipe body 4, so that the central position of the moving frame 706 is flush with the bottom end of the pipe body 4. At the same time, the moving frame 706 is moved so that the two welding heads 9 are respectively located at the connection positions of the two pipe bodies 4. The structures and operating modes of the telescopic rod 709 and the rotating disk 711 are used to ensure that the two welding heads 9 are symmetrically arranged with the welding position as the center, playing a role of positioning and calibration.

[0022] Please refer to Figures 7 to 9 The moving mechanism 8 includes a mounting plate 801, the mounting plate 801 is fixedly connected to the top of the moving frame 706, the interior of the moving frame 706 is slidably connected to a displacement frame 804 extending from the moving frame 706, the outer wall of the mounting plate 801 is installed with a second motor 802, the output end of the second motor 802 is connected to a first threaded rod 803, the first threaded rod 803 runs through the displacement frame 804, one end of the displacement frame 804 is fixedly connected to a push rod 805, one end of the moving frame 706 is symmetrically slidably connected to a mounting seat 806, and the welding head 9 is installed. The outer wall of the mounting seat 806 is provided with an oblique groove 807, and the push rod 805 is slidably connected to the inner wall of the oblique groove 807. The moving mechanism 8 also includes a push block 808, which is slidably connected to the inside of the moving frame 706 and extends out of the moving frame 706. A third spring 809 is connected between the push block 808 and the moving frame 706. One end of the push block 808 is fixedly connected to a push frame 810, which is located between the moving frame 706 and the displacement frame 804. The inside of the movable seat 702 A first block 811 extending to the inner cavity of the connecting groove 704 is slidably connected, a first spring 812 is connected between the first block 811 and the movable seat 702, a second block 813 extending to the bottom end of the movable seat 702 is slidably connected inside the movable seat 702, a second spring 814 is connected between the second block 813 and the movable seat 702, a displacement groove 815 is opened inside the movable seat 702, the first block 811 and the second block 813 both extend to the inner wall of the displacement groove 815, and the inner wall of the displacement groove 815 is slidably connected to the displacement groove 815. Seat 816, the outer wall of the movable seat 702 is rotatably connected with a rotating block 818, one end of the rotating block 818 is fixedly connected with a second threaded rod 817, the second threaded rod 817 extends to the interior of the displacement seat 816, the outer wall of the rotating block 818 is annularly evenly provided with a plurality of reinforcement grooves 819, the interior of the movable seat 702 is located above the second threaded rod 817 and is slidably connected with a push plate 820, a fourth spring 821 is connected between the push plate 820 and the movable seat 702, and the bottom end of the push plate 820 is fixedly connected with a reinforcement frame 822.

[0023] When the position of the movable frame 706 is adjusted, the movable seat 702 moves in the movable groove 701, the connecting seat 705 moves in the connecting groove 704, the first clamping block 811 is engaged with the connecting seat 705 by the elastic force of the first spring 812, and the second clamping block 813 is engaged with the bottom end of the movable groove 701 by the elastic force of the second spring 814; when the position adjustment of the movable frame 706 is completed, the rotating block 818 is rotated, and the rotating block 818 rotates to drive the second threaded rod 817 to rotate, and the second threaded rod 817 rotates to drive the displacement seat 816 to slide in the displacement groove 815, and the displacement groove 815 is displaced to contact the first clamping block 811 and the second clamping block 813, so that the first clamping block 811 and the second clamping block 813 have no movable space, thereby fixing the movable seat 702 in the movable groove 701, and the connecting seat 705 is fixed in the connecting groove 704, and the position of the movable frame 706 is fixed.

[0024] When welding, start the second motor 802, and the operation of the second motor 802 drives the first threaded rod 803 to rotate, and the rotation of the first threaded rod 803 drives the displacement frame 804 to move, and the displacement of the displacement frame 804 drives the push rod 805 to move, and the push rod 805 slides in the inclined groove 807 to drive the mounting seat 806 to move, and the displacement of the mounting seat 806 drives the welding head 9 to move, and the two welding heads 9 move to contact the inner cavity and outer wall of the tube body 4 respectively, and at the same time, the operation of the first motor 6 drives the connecting shaft 5 to rotate, and the rotation of the connecting shaft 5 drives the supporting plate 3 to rotate, and the rotation of the supporting plate 3 drives the tube body 4 to rotate, and when the tube body 4 rotates, the welding head 9 synchronously performs welding operations on the inner cavity and outer wall of the tube body 4.

[0025] When not welded, the displacement frame 804 presses the pushing frame 810 against the outer wall of the moving frame 706, squeezing the third spring 809. The pushing frame 810 is displaced and contacts the pushing plate 820, pushing the pushing plate 820 to be displaced, squeezing the fourth spring 821. The displacement of the pushing plate 820 drives the reinforcement frame 822 to be displaced and separated from the reinforcement groove 819, so that the rotating block 818 can be rotated; when welding, the displacement frame 804 moves, and the pushing frame 810 and the pushing block 808 are displaced by the elastic force of the third spring 809. The pushing frame 810 is displaced and separated from the pushing plate 820. The pushing plate 820 is displaced by the elastic force of the fourth spring 821. The displacement of the pushing plate 820 drives the reinforcement frame 822 to be displaced. The reinforcement frame 822 is displaced and inserted into the reinforcement groove 819, and the rotating block 818 is fixed to prevent the position of the moving frame 706 from loosening.

[0026] Please refer to Figures 2 to 6 The inner wall of the movable groove 701 is in contact with the outer wall of the movable seat 702 . The outer wall of the movable seat 702 is provided with a first limiting hole. The inner wall of the first limiting hole is in contact with the outer wall of the first limiting rod 703 .

[0027] In this embodiment, when the movable seat 702 slides in the movable groove 701 , the first limiting rod 703 slides in the first limiting hole to limit the displacement of the movable seat 702 .

[0028] Please refer to Figures 2 to 6 The inner wall of the slide groove 707 fits with the outer wall of the telescopic rod 709 , and a second limiting hole is opened on the outer wall of the telescopic rod 709 , and the inner wall of the second limiting hole fits with the outer wall of the second limiting rod 708 .

[0029] In this embodiment, when the telescopic rod 709 slides in the slide groove 707 , the second limiting rod 708 slides in the second limiting hole to limit the displacement direction of the telescopic rod 709 .

[0030] Please refer to Figures 2 to 6 Two guide grooves 712 are provided and circumferentially distributed on the outer wall of the rotating disk 711 , and the inner wall of the guide groove 712 is in contact with the outer wall of the guide rod 713 .

[0031] In this embodiment: the rotating disk 711 is driven to rotate, so that the guide rod 713 slides in the guide groove 712, thereby driving the two telescopic rods 709 to move synchronously in opposite directions. The displacement of the telescopic rods 709 drives the positioning wheels 710 to move, and the two positioning wheels 710 synchronously move to contact the inner cavity and outer wall of the tube body 4 respectively.

[0032] Please refer to Figures 7 to 9 A first threaded hole is formed on the outer wall of the displacement frame 804 , and the first threaded hole matches the first threaded rod 803 . The outer wall of the push rod 805 fits the inner wall of the inclined groove 807 .

[0033] In this embodiment: the operation of the second motor 802 drives the first threaded rod 803 to rotate, the rotation of the first threaded rod 803 drives the displacement frame 804 to move, the displacement of the displacement frame 804 drives the push rod 805 to move, and the push rod 805 slides in the inclined groove 807 to drive the mounting seat 806 to move.

[0034] Please refer to Figures 7 to 9 The outer wall of the connecting seat 705 is in contact with the inner wall of the connecting groove 704. The outer wall of the connecting seat 705 is provided with a first card slot. One end of the first card block 811 is engaged with the first card slot. The bottom end of the movable groove 701 is provided with a second card slot. One end of the second card block 813 is engaged with the second card slot.

[0035] In this embodiment: the movable seat 702 moves in the movable groove 701, the connecting seat 705 moves in the connecting groove 704, the first clamping block 811 is engaged with the connecting seat 705 under the elastic force of the first spring 812, and the second clamping block 813 is engaged with the bottom end of the movable groove 701 under the elastic force of the second spring 814.

[0036] Please refer to Figures 7 to 9 The inner wall of the displacement groove 815 fits with the outer wall of the displacement seat 816 , and the outer wall of the displacement seat 816 is provided with a second threaded hole, which matches the second threaded rod 817 .

[0037] In this embodiment: the rotating block 818 is rotated, and the rotating block 818 drives the second threaded rod 817 to rotate, and the second threaded rod 817 drives the displacement seat 816 to slide in the displacement groove 815, and the displacement groove 815 is displaced to contact the first clamping block 811 and the second clamping block 813, so that there is no space for displacement between the first clamping block 811 and the second clamping block 813, thereby fixing the movable seat 702 in the movable groove 701, and fixing the connecting seat 705 in the connecting groove 704.

[0038] Please refer to Figures 7 to 9 The bottom outer wall of the reinforcement frame 822 is in contact with the inner wall of the reinforcement groove 819 .

[0039] In this embodiment: the displacement frame 804 moves, the pushing frame 810 and the pushing block 808 are displaced by the elastic force of the third spring 809, the pushing frame 810 is displaced and separated from the pushing plate 820, the pushing plate 820 is displaced by the elastic force of the fourth spring 821, the displacement of the pushing plate 820 drives the reinforcement frame 822 to displace, the reinforcement frame 822 is displaced and inserted into the reinforcement groove 819, and the rotating block 818 is fixed.

[0040] In addition, it should be pointed out that this device is suitable for welding thick plate stainless steel pipes, low carbon steel and low alloy steel pipes. In particular, preheating is required for welding stainless steel pipes to avoid the risk of embrittlement or cracking in the heat affected zone. This device can achieve double-sided welding and effectively reduce deformation, that is, the contraction forces on both sides offset each other, reducing angular deformation or bending deformation; it can also improve the penetration, that is, double-sided heating can enhance the penetration effect (especially for thick plates).

[0041] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An angle-adjustable stainless steel pipe butt welding device, comprising a base (1), the top of the base (1) being symmetrically fixedly connected to a plurality of linearly arranged support seats (2), the top of the support seats (2) being rotatably connected to a support plate (3), the support plate (3) being used to support a pipe body (4), characterized in that: The support discs (3) on one side are fixedly connected by a connecting shaft (5). A first motor (6) is installed on the outer wall of the support base (2). The connecting shaft (5) is connected to the output end of the first motor (6). The two pipe bodies (4) are welded by a welding head (9). The position of the welding head (9) is adjusted by a positioning mechanism (7). The welding head (9) is driven by a moving mechanism (8) to perform a welding operation.

2. The angle-adjustable stainless steel pipe butt welding device according to claim 1 is characterized in that: The positioning mechanism (7) includes a movable groove (701) opened at the top end of the base (1). A movable seat (702) is slidably connected to the inner wall of the movable groove (701). A first limiting rod (703) penetrating through the movable seat (702) is fixedly connected to the inner wall of the movable groove (701). A connecting groove (704) is opened at the top end of the movable seat (702). A connecting seat (705) is slidably connected to the inner wall of the connecting groove (704). A "C"-shaped moving frame (706) is fixedly connected to the top end of the connecting seat (705). The welding head (9) is arranged at one end of the moving frame (706). A sliding groove (707) is opened in the inner cavity of the moving frame (706). Telescopic rods (709) are symmetrically and slidably connected to the inner wall of the sliding groove (707). One end of the telescopic rod (709) is rotatably connected to a positioning wheel (710). A second limiting rod (708) penetrating through the telescopic rod (709) is fixedly connected to the inner wall of the sliding groove (707). A rotating disc (711) is rotatably connected to the outer wall of the telescopic rod (709) inside the moving frame (706). A guiding groove (712) is opened on the outer wall of the rotating disc (711). A guiding rod (713) is fixedly connected to the outer wall of the telescopic rod (709). The guiding rod (713) is slidably connected to the inner wall of the guiding groove (712).

3. The angle-adjustable stainless steel pipe butt welding device according to claim 2, characterized in that: The moving mechanism (8) includes a mounting plate (801) fixedly connected to the top end of the moving frame (706). A displacement frame (804) extending out of the moving frame (706) is slidably connected inside the moving frame (706). A second motor (802) is installed on the outer wall of the mounting plate (801). A first threaded rod (803) is connected to the output end of the second motor (802). The first threaded rod (803) penetrates through the displacement frame (804). A push rod (805) is fixedly connected to one end of the displacement frame (804). Mounting seats (806) are symmetrically and slidably connected to one end of the moving frame (706). The welding head (9) is installed on the outer wall of the mounting seat (806). An inclined groove (807) is opened on the outer wall of the mounting seat (806). The push rod (805) is slidably connected to the inner wall of the inclined groove (807).

4. The angle-adjustable stainless steel pipe butt welding device according to claim 3 is characterized in that: The moving mechanism (8) further comprises a pushing block (808), the pushing block (808) being slidably connected to the inside of the moving frame (706) and extending out of the moving frame (706), a third spring (809) being connected between the pushing block (808) and the moving frame (706), one end of the pushing block (808) being fixedly connected to a pushing frame (810), the pushing frame (810) being located between the moving frame (706) and the displacement frame (804), a first clamping block (811) extending to the inner cavity of the connecting groove (704) being slidably connected to the inside of the movable seat (702), a first spring (812) being connected between the first clamping block (811) and the movable seat (702), a second clamping block (813) extending to the bottom end of the movable seat (702) being slidably connected to the inside of the movable seat (702), a second spring (813) being connected between the second clamping block (813) and the movable seat (702). 814), a displacement groove (815) is provided inside the movable seat (702), the first clamping block (811) and the second clamping block (813) both extend to the inner wall of the displacement groove (815), the inner wall of the displacement groove (815) is slidably connected to a displacement seat (816), the outer wall of the movable seat (702) is rotatably connected to a rotating block (818), one end of the rotating block (818) is fixedly connected to a second threaded rod (817), the second threaded rod (817) extends to the inside of the displacement seat (816), the outer wall of the rotating block (818) is annularly evenly provided with a plurality of reinforcement grooves (819), the inside of the movable seat (702) is slidably connected to a push plate (820) located above the second threaded rod (817), a fourth spring (821) is connected between the push plate (820) and the movable seat (702), and the bottom end of the push plate (820) is fixedly connected to a reinforcement frame (822).

5. The angle-adjustable stainless steel pipe butt welding device according to claim 2, characterized in that: The inner wall of the movable groove (701) fits with the outer wall of the movable seat (702); the outer wall of the movable seat (702) is provided with a first limiting hole; the inner wall of the first limiting hole fits with the outer wall of the first limiting rod (703); the inner wall of the sliding groove (707) fits with the outer wall of the telescopic rod (709); the outer wall of the telescopic rod (709) is provided with a second limiting hole; the inner wall of the second limiting hole fits with the outer wall of the second limiting rod (708).

6. The angle-adjustable stainless steel pipe butt welding device according to claim 2, characterized in that: Two guide grooves (712) are provided and are circumferentially distributed on the outer wall of the rotating disk (711); the inner wall of the guide groove (712) fits the outer wall of the guide rod (713).

7. The angle-adjustable stainless steel pipe butt welding device according to claim 4, characterized in that: The outer wall of the displacement frame (804) is provided with a first threaded hole, the first threaded hole matches the first threaded rod (803), and the outer wall of the push rod (805) fits the inner wall of the inclined groove (807).

8. The angle-adjustable stainless steel pipe butt welding device according to claim 4, characterized in that: The outer wall of the connecting seat (705) is fitted with the inner wall of the connecting groove (704); the outer wall of the connecting seat (705) is provided with a first clamping groove, one end of the first clamping block (811) is clamped with the first clamping groove; the bottom end of the movable groove (701) is provided with a second clamping groove, one end of the second clamping block (813) is clamped with the second clamping groove.

9. The angle-adjustable stainless steel pipe butt welding device according to claim 4, characterized in that: The inner wall of the displacement groove (815) fits with the outer wall of the displacement seat (816), and the outer wall of the displacement seat (816) is provided with a second threaded hole, and the second threaded hole matches the second threaded rod (817).

10. The angle-adjustable stainless steel pipe butt welding device according to claim 4, characterized in that: The bottom outer wall of the reinforcement frame (822) fits the inner wall of the reinforcement groove (819).

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