A stainless steel pipe welding device

Abstract

The invention discloses a stainless steel pipe welding device, which relates to the technical field of stainless steel pipe welding, and comprises a workbench, wherein two ends of the workbench are respectively slidably mounted with a double bracket frame and a pair of single bracket frames are fixedly mounted, and further comprises a fixing component and a welding and grinding component; the welding and grinding component comprises a pair of limiting notches opened on the workbench, wherein a frame-shaped seat is slidably mounted in the limiting notches, and a vertically arranged electric telescopic rod 2 is fixedly mounted at the top middle end of the frame-shaped seat; in the invention, an external gas supply device introduces inert gas into a conical cavity through a hose, and respectively blows in inert gas from both ends of two stainless steel pipes to be welded, at which time, the inert gas can only blow out from the weld, which can form an anti-oxidation protection treatment for welding on the one hand, and can accelerate the carrying away of welding heat on the other hand, and avoid the occurrence of welding overheating; the inert gas continuously blows out from the welding position, which can reduce the situation where welding slag falls into the interior of the stainless steel pipe.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel pipe welding, in particular to a stainless steel pipe welding device. Background Art

[0002] When stainless steel pipes are put into use, two stainless steel pipes are often aligned and welded due to size or sealing issues to ensure safe and reliable operation of the stainless steel pipes.

[0003] After searching, a Chinese patent with a publication number of CN104588882B discloses a laser welding machine with an inert gas protection system, including a laser welding system, an inert gas supply system and an inert gas protection system, wherein the inert gas protection system includes a connecting mechanism, a gas adapter, a flexibly bendable plastic tube and a stainless steel tube; one end of the stainless steel tube is a regular circle connected to the flexibly bendable plastic tube, and the other end is a free end, the free end is provided with a 30° groove, and a through hole with a diameter of 10 mm is drilled at one end of the groove for the passage of the laser beam; the inert gas supply system sprays inert gas to the welding area through the stainless steel tube of the inert gas protection system to drive off the photo-induced plasma formed above the welding area, improve the coupling of light energy with the welding workpiece, and avoid the contact between the welding molten pool and the air by forming an inert gas protection area above the welding molten pool, thereby promoting high-quality protection of the weld.

[0004] Based on the above search and combined with the existing technology, it is found that: the current inert gas supply system is mainly used for protection during welding, by continuously delivering inert gas (such as argon or helium) to the welding area, by isolating oxygen, preventing the welding material from oxidizing, thereby ensuring the welding quality; the inert gas is usually sprayed from one side of the welding gun head to form a protective layer; however, this side-blowing gas supply design has limitations, especially in dealing with welding slag, the direct blowing of gas may change the natural falling trajectory of the welding slag, causing the welding slag to be carried outside the welding area, or even into the inside of the stainless steel pipe, which is contrary to the original design intention of the protective gas to reduce impurities and improve cleanliness; the entry of welding slag into the stainless steel pipe not only increases the difficulty of cleaning, but may also form blockages or cause local corrosion in the pipeline, affecting the long-term performance of the pipeline. Summary of the invention

[0005] The object of the present invention is to provide a stainless steel pipe welding device to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: a stainless steel pipe welding device, comprising a workbench, two ends of which are respectively slidably mounted with a double bracket frame and fixedly mounted with a pair of single bracket frames, and also comprising a fixing component and a welding and grinding component;

[0007] The welding and grinding assembly comprises a pair of limiting slots opened on the workbench, a frame-shaped seat is slidably installed in the limiting slots, and a vertically arranged electric telescopic rod two is fixedly installed at the top middle end of the frame-shaped seat, the extension rod end of the electric telescopic rod two is fixedly installed with a U-shaped mounting plate, and a welding gun head is fixedly installed at the top middle end of the U-shaped mounting plate, and toothed plates are fixedly installed on the outer walls of both sides of the U-shaped mounting plate, a pair of U-shaped seats are fixedly installed on the top of the frame-shaped seat, and transmission gears meshing with the toothed plates are rotatably installed on the opposite sides of the tops of the two U-shaped seats, side shafts are rotatably installed on the other sides of the tops of the two U-shaped seats, and a driven gear is fixedly installed on the middle ends of the side shafts, and the driven gear and the transmission gear are meshed with each other, and a pair of movable swing arms are fixedly connected at both ends of the side shafts, and a grinding roller is rotatably installed at the ends of each pair of the movable swing arms, and a driving motor is fixedly installed at one end of the grinding roller, and the driving motor is fixed on the adjacent movable swing arm;

[0008] Protective plates are connected to both sides of the top of the U-shaped mounting plate through hinges, and a return spring is fixedly connected between the inner wall of the protective plate and the top of the U-shaped mounting plate. Evenly distributed sealing bristles are fixedly provided at the ends of the protective plates, and transmission units are provided on the two protective plates.

[0009] Preferably, the transmission unit includes a pair of prism cavity tubes, which are fixedly installed on opposite sides of the two protective plates, and a piston rod is slidably installed in the prism cavity tubes, a cross bar is fixedly installed on the end of the piston rod, and a second return spring is fixedly connected between the piston rod and the prism cavity tube.

[0010] Preferably, a C-shaped slide bar is fixedly installed on the bottom of the double bracket frame, a fixed block is fixedly installed on the bottom outer wall of the workbench, and a hydraulic rod 1 is fixedly connected between the fixed block and the C-shaped slide bar, and a hydraulic rod 2 is fixedly connected between the other side of the fixed block and the frame seat.

[0011] Preferably, a rotating plate one and a rotating plate two are rotatably installed inside the double bracket frame, and a rotating plate three and a rotating plate four are rotatably installed inside the two single bracket frames respectively, a tooling cylinder is fixedly installed at the center of the rotating plate two and the rotating plate four, and a conical cavity cylinder is fixedly installed at the center of the rotating plate one and the rotating plate three.

[0012] Preferably, one side of the double-bracket frame and one of the single-bracket frames are fixedly connected to a fixed side rod, and the top of the fixed side rod is fixedly installed with an adapter, one side of the adapter is rotatably connected to the conical cavity, and the other side of the adapter is connected to an external air supply device through a hose.

[0013] Preferably, a driven outer gear ring is fixedly installed on the opposite side of the rotating plate three and the rotating plate four, a driving rod is installed on the top of the two single bracket frames for common rotation, and a pair of driving gears are fixedly installed on the outer peripheral wall of the driving rod, the driving gears are meshed with the driven outer gear ring, one end of the driving rod is fixedly connected to a driving motor, and the driving motor is fixed on the adjacent single bracket frame.

[0014] Preferably, a guide rod is fixedly mounted on the other end of the driving rod, and the guide rod is movably connected to the top end of the double bracket frame.

[0015] Preferably, the outer walls on both sides of the frame seat are fixedly mounted with extended side panels, and the tops of the two extended side panels are fixedly mounted with vertical poles, the vertical poles are L-shaped structures, and the ends of the vertical poles are commonly fixedly mounted with prismatic cavity tubes, which are slidably connected to the guide rods.

[0016] Preferably, an electric telescopic rod 1 is fixedly mounted on the bottom outer wall of the prism tube, and a sponge board is fixedly mounted on the end of the extension rod of the electric telescopic rod 1.

[0017] Preferably, a support frame is fixedly mounted on the bottom of the workbench, and a frame end of an integrated structure is provided on one side of the support frame.

[0018] The present invention provides a stainless steel pipe welding device by improvement, which has the following improvements and advantages compared with the prior art:

[0019] First, when the electric telescopic rod 2 is extended, the present invention can push the U-shaped mounting plate and the tooth plate to move upward, at which time, the transmission gear is driven to rotate, and through the transmission action of the driven gear, the two side shafts are driven to rotate toward each other, thereby making the two pairs of movable swing arms move toward the welding gun head, so that the grinding roller can be close to the surface of the stainless steel pipe to achieve the grinding of the welding position. At the same time, the swing angle of the movable swing arm is proportional to the extension distance of the electric telescopic rod 2; that is, when the diameter of the stainless steel pipe is smaller, the extension distance of the electric telescopic rod 2 is longer, and at this time, the two movable swing arms are closer together, so that the two grinding rollers can be adaptively close to the surface of the stainless steel pipe while welding the stainless steel pipe, ensuring the grinding effect of the weld;

[0020] Second, the external gas supply device of the present invention introduces inert gas into the conical cavity through a hose, and blows in inert gas from both ends of the two stainless steel pipes to be welded. At this time, the inert gas can only blow out from the weld, which can form an anti-oxidation protection treatment for the welding on the one hand, and on the other hand, it can accelerate the carrying away of welding heat to avoid overheating of welding; finally, the inert gas continues to blow out from the welding position, which can reduce the situation where welding slag falls into the inside of the stainless steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall first-view stereoscopic structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall second viewing angle stereoscopic structure of the present invention;

[0024] Figure 3 It is a side view structural schematic diagram of the present invention;

[0025] Figure 4 It is a schematic diagram of the cutaway structure of a single bracket frame of the present invention;

[0026] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the welding and grinding assembly of the present invention;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the U-shaped seat and the U-shaped mounting plate of the present invention;

[0029] Figure 8 For the present invention Figure 7 Enlarged structural diagram at B in the middle.

[0030] Reference numerals:

[0031] 1. Workbench; 101. Support frame; 102. Frame end; 103. Limiting notch; 2. Double bracket frame; 201. Single bracket frame; 202. Turntable 1; 203. Turntable 2; 204. Tool cylinder; 205. Conical cavity cylinder; 206. Turntable 3; 207. Turntable 4; 3. Fixed side rod; 301. Adapter; 4. Drive motor; 401. Drive rod; 402. Drive gear; 403. Driven outer gear ring; 5. Fixed block; 501. Hydraulic rod 1; 502. Hydraulic rod 2; 503. Frame seat; 504. Extended side plate; 505. C-type Sliding rod; 6. Vertical rod; 601. Prismatic tube; 602. Electric telescopic rod 1; 603. Sponge board; 7. Electric telescopic rod 2; 701. U-shaped seat; 702. Side shaft; 703. Movable rocker arm; 704. Driven gear; 705. Transmission gear; 706. Drive motor; 707. Grinding roller; 8. U-shaped mounting plate; 801. Tooth plate; 802. Welding gun head; 9. Protective plate; 901. Reset spring 1; 902. Sealing bristles; 903. Prismatic tube; 904. Reset spring 2; 905. Piston rod; 906. Cross bar; 10. Guide rod. DETAILED DESCRIPTION

[0032] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. 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.

[0033] The present invention provides a stainless steel pipe welding device through improvement. The technical solution of the present invention is:

[0034] like Figures 1 to 8 As shown, an embodiment of the present invention provides a stainless steel pipe welding device, including a workbench 1, at both ends of which are respectively slidably mounted a double bracket frame 2 and fixedly mounted a pair of single bracket frames 201, and also includes a fixing component and a welding and grinding component; the fixing component is provided for fixing the stainless steel pipe to be welded; the welding and grinding component is provided for welding the stainless steel pipe, and the welding position can be ground after welding.

[0035] The welding and grinding assembly includes a pair of limiting slots 103 opened on the workbench 1, a frame seat 503 is slidably installed in the limiting slots 103, and a vertically arranged electric telescopic rod 2 7 is fixedly installed on the top middle end of the frame seat 503, a U-shaped mounting plate 8 is fixedly installed on the extension rod end of the electric telescopic rod 2 7, and a welding gun head 802 is fixedly installed on the top middle end of the U-shaped mounting plate 8, and tooth plates 801 are fixedly installed on the outer walls of both sides of the U-shaped mounting plate 8, and a pair of U-shaped seats 701 are fixedly installed on the top of the frame seat 503, and the tops of the two U-shaped seats 701 are relatively A transmission gear 705 meshing with the tooth plate 801 is rotatably installed on one side, a side shaft 702 is rotatably installed on the other side of the top of the two U-shaped seats 701, and a driven gear 704 is fixedly installed on the middle end of the side shaft 702, and the driven gear 704 and the transmission gear 705 are meshed with each other, and a pair of movable swing rods 703 are fixedly connected at both ends of the side shaft 702, and a grinding roller 707 is rotatably installed at the end of each pair of movable swing rods 703, and a driving motor 706 is fixedly installed on one end of the grinding roller 707, and the driving motor 706 is fixed on the adjacent movable swing rod 703;

[0036] Protective plates 9 are connected to both sides of the top of the U-shaped mounting plate 8 through hinges, and a return spring 901 is fixedly connected between the inner wall of the protective plate 9 and the top of the U-shaped mounting plate 8. Evenly distributed sealing bristles 902 are fixedly provided at the ends of the protective plate 9, and transmission units are provided on the two protective plates 9.

[0037] Through the above structure, when the two stainless steel pipes are fixed and aligned, the subsequent hydraulic rod 2 502 can be used to move the frame seat 503 to the bottom of the stainless steel pipe interface. At this time, the electric telescopic rod 2 7 can be controlled to push the welding gun head 802 toward the stainless steel pipe interface and perform welding on it.

[0038] At the same time, when the electric telescopic rod 27 is extended, it can push the U-shaped mounting plate 8 and the toothed plate 801 to move upward. At this time, the transmission gear 705 is driven to rotate, and through the transmission action of the driven gear 704, the two side shafts 702 are driven to rotate towards each other, so that the two pairs of movable swing arms 703 are moved toward the welding gun head 802, so that the grinding roller 707 can be close to the surface of the stainless steel pipe to achieve the grinding of the welding position. At the same time, the swing angle of the movable swing arm 703 is proportional to the extension distance of the electric telescopic rod 27; that is, when the diameter of the stainless steel pipe is smaller, the extension distance of the electric telescopic rod 27 is longer, and at this time, the two movable swing arms 703 are closer together, so that when the stainless steel pipe is welded, the two grinding rollers 707 are adaptively close to the surface of the stainless steel pipe to ensure the grinding effect of the weld.

[0039] As a further solution of the present invention, the transmission unit includes a pair of prism cavity tubes 903, which are fixedly installed on the opposite sides of the two protective plates 9, and a piston rod 905 is slidably installed in the prism cavity tubes 903, a cross bar 906 is fixedly installed at the end of the piston rod 905, and a return spring 904 is fixedly connected between the piston rod 905 and the prism cavity tube 903.

[0040] Through the above structure, when the two pairs of movable rocker arms 703 are close to each other, the transmission unit can push the two protective plates 9 close to each other, and cooperate with the sealing bristles 902 to cover the welding area and prevent welding slag from falling on a large scale; at the same time, after the two protective plates 9 are fitted together, the piston rod 905 cooperates with the return spring 904 to move in the prism tube 903. At this time, the two pairs of movable rocker arms 703 can continue to deflect, thereby adapting to the welding of small-sized stainless steel pipes.

[0041] As a further solution of the present invention, a C-shaped slide bar 505 is fixedly installed at the bottom of the double bracket frame 2, a fixed block 5 is fixedly installed on the bottom outer wall of the workbench 1, and a hydraulic rod 1 501 is fixedly connected between the fixed block 5 and the C-shaped slide bar 505, and a hydraulic rod 2 502 is fixedly connected between the other side of the fixed block 5 and the frame seat 503.

[0042] The second hydraulic rod 502 can be used to adjust the position of the frame seat 503; and the first hydraulic rod 501 is used to adjust the position of the double bracket frame 2, so as to adapt to the welding of stainless steel pipes of different lengths.

[0043] As a further solution of the present invention, a rotating plate 1 202 and a rotating plate 203 are rotatably installed inside the double bracket frame 2, and a rotating plate 3 206 and a rotating plate 4 207 are rotatably installed inside the two single bracket frames 201 respectively, and a tooling cylinder 204 is fixedly installed at the center of the rotating plate 203 and the rotating plate 4 207, and a conical cavity cylinder 205 is fixedly installed at the center of the rotating plate 1 202 and the rotating plate 3 206.

[0044] The tooling cylinder 204 is provided, on which a plurality of threaded screw rods are threadedly installed, and the stainless steel pipe inserted into the tooling cylinder 204 can be pressed and fixed by screwing the threaded screw rods; the conical cavity cylinder 205 is provided, and its conical end is used to insert the end of the stainless steel pipe in actual use to realize the pre-fixation of the stainless steel pipe.

[0045] Furthermore, one side of the double bracket frame 2 and one of the single bracket frames 201 are fixedly connected to a fixed side rod 3, and the top of the fixed side rod 3 is fixedly installed with an adapter 301, one side of the adapter 301 is rotatably connected to the conical cavity 205, and the other side of the adapter 301 is connected to an external air supply device through a hose.

[0046] Through the above structure, the external gas supply equipment introduces inert gas into the conical cavity 205 through the hose, and blows in inert gas from both ends of the two stainless steel pipes to be welded. At this time, the inert gas can only blow out from the weld. On the one hand, it can form an anti-oxidation protection treatment for the welding, and on the other hand, it can accelerate the carrying away of welding heat to avoid overheating of welding; finally, the inert gas continues to blow out from the welding position, which can reduce the situation where welding slag falls into the inside of the stainless steel pipe.

[0047] Furthermore, a driven outer gear ring 403 is fixedly installed on the opposite side of the rotating plate three 206 and the rotating plate four 207, and a driving rod 401 is installed on the top of the two single bracket frames 201 for common rotation, and a pair of driving gears 402 are fixedly installed on the outer peripheral wall of the driving rod 401, and the driving gears 402 are meshed with the driven outer gear ring 403, and one end of the driving rod 401 is fixedly connected to a driving motor 4, and the driving motor 4 is fixed on the adjacent single bracket frame 201.

[0048] Through the above structure, when the driving motor 4 is controlled to start, the driving rod 401 can be driven to rotate, and through the transmission action of the driving gear 402 and the driven outer gear ring 403, the rotating plate three 206 and the rotating plate four 207 are driven to rotate, thereby driving one of the stainless steel tubes to rotate through the conical cavity tube 205 at one end and the tooling tube 204.

[0049] Furthermore, a guide rod 10 is fixedly mounted on the other end of the driving rod 401 , and the guide rod 10 is movably connected to the top end of the double bracket frame 2 ; through the above structure, the guide rod 10 can further improve the stability of the movement of the double bracket frame 2 .

[0050] As a further solution of the present invention, the outer walls on both sides of the frame seat 503 are fixedly installed with extended side panels 504, and the tops of the two extended side panels 504 are fixedly installed with vertical poles 6, the vertical poles 6 are L-shaped structures, and the ends of the vertical poles 6 are jointly fixedly installed with prismatic cavity tubes 601, and the prismatic cavity tubes 601 are slidably connected to the guide rods 10.

[0051] Furthermore, an electric telescopic rod 602 is fixedly installed on the bottom outer wall of the prism cavity tube 601, and a sponge board 603 is fixedly installed on the end of the extension rod of the electric telescopic rod 602.

[0052] Through the above structure, when the frame seat 503 moves, the extended side plate 504 and the vertical rod 6 can drive the prism cavity tube 601 to rotate synchronously, thereby ensuring that during the welding process, the electric telescopic rod 1 602 can be located directly above the weld. When the grinding rollers 707 on both sides grind the weld, the electric telescopic rod 1 602 can be controlled to start and push the sponge plate 603 to contact the weld surface, thereby wiping the debris generated by grinding, which is beneficial to reduce the subsequent cleaning process.

[0053] Furthermore, a support frame 101 is fixedly installed at the bottom of the workbench 1, and a frame end 102 of an integrated structure is provided on one side of the support frame 101; the support frame 101 is used to support the workbench 1; the provided frame end 102 can avoid interference with the movement of the C-shaped slide bar 505.

[0054] The specific working method is: when in use, the tooling cylinder 204 is provided, on which a plurality of threaded screw rods are threadedly installed, and the stainless steel pipe inserted into the tooling cylinder 204 can be pressed and fixed by screwing the threaded screw rods; the conical cavity cylinder 205 is provided, and when in actual use, its conical end is used to insert the end of the stainless steel pipe to realize the pre-fixation of the stainless steel pipe; the hydraulic rod 501 is used to adjust the position of the double bracket frame 2, so that the two stainless steel pipes are aligned and a welding gap is reserved;

[0055] After the two stainless steel pipes are fixed and aligned, the subsequent hydraulic rod 2 502 can be used to move the frame seat 503 to the bottom of the stainless steel pipe interface. At this time, the electric telescopic rod 2 7 can be controlled to start, so that the welding gun head 802 can be pushed toward the stainless steel pipe interface and welded. At the same time, when the electric telescopic rod 2 7 is extended, the U-shaped mounting plate 8 and the tooth plate 801 are pushed upward. At this time, the transmission gear 705 is driven to rotate, and through the transmission effect of the driven gear 704, the two side shafts 702 are driven to rotate towards each other, thereby making the two pairs of movable swing rods 7 03 are both moved toward the welding gun head 802, so that the grinding roller 707 is close to the surface of the stainless steel pipe to achieve grinding of the welding position. At the same time, the swing angle of the movable swing arm 703 is proportional to the extension distance of the electric telescopic rod 27; that is, when the diameter of the stainless steel pipe is smaller, the extension distance of the electric telescopic rod 27 is longer, and at this time, the two movable swing arms 703 are closer together, so that when the stainless steel pipe is welded, the two grinding rollers 707 are adaptively close to the surface of the stainless steel pipe, and after the drive motor 706 is started, the grinding effect of the weld is ensured;

[0056] After completing a welding spot, when the driving motor 4 is controlled to start, the driving rod 401 is driven to rotate, and through the transmission effect of the driving gear 402 and the driven outer gear ring 403, the rotating plate 3 206 and the rotating plate 4 207 are driven to rotate, thereby driving one of the stainless steel pipes to rotate through the conical cavity tube 205 at one end and the tooling tube 204, and at the same time, the two stainless steel pipes are driven to rotate synchronously in coordination with the welding spot that has been completed;

[0057] During the welding process, the external gas supply device introduces inert gas into the conical cavity 205 through a hose, and blows in inert gas from both ends of the two stainless steel pipes to be welded. At this time, the inert gas can only blow out from the weld, which, on the one hand, forms an anti-oxidation protection treatment for the welding, and on the other hand, accelerates the removal of welding heat to avoid overheating of the welding; finally, the inert gas continues to blow out from the welding position to reduce the situation where welding slag falls into the stainless steel pipe;

[0058] When the frame seat 503 moves, the prism tube 601 is driven to rotate synchronously by the extended side plate 504 and the vertical rod 6, thereby ensuring that during the welding process, the electric telescopic rod 1 602 can be located directly above the weld. When the grinding rollers 707 on both sides are grinding the weld, the electric telescopic rod 1 602 can be controlled to start and push the sponge plate 603 to contact the weld surface, so as to wipe the debris generated by the grinding, which is conducive to reducing the subsequent cleaning process.

[0059] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stainless steel pipe welding device, comprising a workbench (1), wherein two ends of the workbench (1) are respectively slidably mounted with a double bracket frame (2) and fixedly mounted with a pair of single bracket frames (201), characterized in that: It also includes fixing components and welding and grinding components; The welding and grinding assembly comprises a pair of limiting slots (103) formed on the workbench (1), a frame seat (503) being slidably mounted in the limiting slots (103), and a vertically arranged electric telescopic rod (7) being fixedly mounted on the middle of the top of the frame seat (503), a U-shaped mounting plate (8) being fixedly mounted on the end of the extension rod of the electric telescopic rod (7), and a welding gun head (802) being fixedly mounted on the middle of the top of the U-shaped mounting plate (8), tooth plates (801) being fixedly mounted on the outer walls of both sides of the U-shaped mounting plate (8), and a pair of U-shaped seats (701) being fixedly mounted on the top of the frame seat (503), and the tops of the two U-shaped seats (701) being aligned with each other. A transmission gear (705) meshing with the toothed plate (801) is rotatably mounted on one side, a side shaft (702) is rotatably mounted on the other side of the top of the two U-shaped seats (701), and a driven gear (704) is fixedly mounted on the middle end of the side shaft (702), and the driven gear (704) and the transmission gear (705) are meshed with each other, and a pair of movable swing rods (703) are fixedly connected at both ends of the side shaft (702), and a grinding roller (707) is rotatably mounted at the end of each pair of movable swing rods (703), and a driving motor (706) is fixedly mounted on one end of the grinding roller (707), and the driving motor (706) is fixed on the adjacent movable swing rod (703); Both sides of the top of the U-shaped mounting plate (8) are connected to protective plates (9) via hinges, and a return spring (901) is fixedly connected between the inner wall of the protective plate (9) and the top of the U-shaped mounting plate (8), and evenly distributed sealing bristles (902) are fixedly arranged at the ends of the protective plates (9), and transmission units are arranged on the two protective plates (9); A rotating plate 1 (202) and a rotating plate 2 (203) are rotatably mounted inside the double bracket frame (2), and a rotating plate 3 (206) and a rotating plate 4 (207) are rotatably mounted inside the two single bracket frames (201), respectively; a tooling cylinder (204) is fixedly mounted at the center of the rotating plate 2 (203) and the rotating plate 4 (207), and a conical cavity cylinder (205) is fixedly mounted at the center of the rotating plate 1 (202) and the rotating plate 3 (206); One side of the double bracket frame (2) and one of the single bracket frames (201) is fixedly connected to a fixed side rod (3), and a top end of the fixed side rod (3) is fixedly mounted with an adapter (301), one side of the adapter (301) is rotatably connected to the conical cavity (205), and the other side of the adapter (301) is connected to an external air supply device via a hose.

2. A stainless steel pipe welding device according to claim 1, characterized in that: The transmission unit comprises a pair of prism cavity tubes (903), the prism cavity tubes (903) being fixedly mounted on opposite sides of two protective plates (9), and a piston rod (905) being slidably mounted in the prism cavity tubes (903), a cross bar (906) being fixedly mounted at the end of the piston rod (905), and a second return spring (904) being fixedly connected between the piston rod (905) and the prism cavity tubes (903).

3. A stainless steel pipe welding device according to claim 1, characterized in that: A C-shaped slide bar (505) is fixedly installed at the bottom of the double bracket frame (2), a fixed block (5) is fixedly installed on the outer wall of the bottom of the workbench (1), and a hydraulic rod 1 (501) is fixedly connected between the fixed block (5) and the C-shaped slide bar (505), and a hydraulic rod 2 (502) is fixedly connected between the other side of the fixed block (5) and the frame seat (503).

4. A stainless steel pipe welding device according to claim 1, characterized in that: A driven outer gear ring (403) is fixedly mounted on opposite sides of the rotating plate three (206) and the rotating plate four (207); a driving rod (401) is rotatably mounted on the tops of the two single bracket frames (201); a pair of driving gears (402) is fixedly mounted on the outer peripheral walls of the driving rods (401); the driving gears (402) and the driven outer gear ring (403) are meshed with each other; one end of the driving rod (401) is fixedly connected to a driving motor (4), and the driving motor (4) is fixed to an adjacent single bracket frame (201).

5. A stainless steel pipe welding device according to claim 4, characterized in that: A guide rod (10) is fixedly mounted on the other end of the driving rod (401), and the guide rod (10) is movably connected to the top end of the double bracket frame (2).

6. A stainless steel pipe welding device according to claim 5, characterized in that: Extended side panels (504) are fixedly mounted on both side outer walls of the frame-shaped seat (503), and vertical poles (6) are fixedly mounted on the tops of the two extended side panels (504). The vertical poles (6) are L-shaped structures, and prism tubes (601) are fixedly mounted on the ends of the vertical poles (6). The prism tubes (601) are slidably connected to the guide rods (10).

7. A stainless steel pipe welding device according to claim 6, characterized in that: An electric telescopic rod 1 (602) is fixedly mounted on the outer wall of the bottom of the prism tube (601), and a sponge plate (603) is fixedly mounted on the end of the extension rod of the electric telescopic rod 1 (602).

8. A stainless steel pipe welding device according to claim 1, characterized in that: A support frame (101) is fixedly mounted on the bottom of the workbench (1), and a frame end (102) of an integral structure is provided on one side of the support frame (101).

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