A heating furnace processing automatic welding equipment

Abstract

The present invention relates to the technical field of automatic welding equipment, and specifically proposes an automatic welding equipment for heating furnace processing, comprising two circular tubular mixing tubes that are installed in sequence from top to bottom and can rotate with each other, the surfaces of the two mixing tubes are provided with ventilation grooves that penetrate from top to bottom and are used to convey the gas required for brazing, the opposite ends of the two mixing tubes are provided with annular connecting grooves that connect the two ventilation grooves, and a sealing component is provided between the two mixing tubes to prevent gas leakage; the interior of the mixing tube is equipped with a protective tube with a heat insulation function for being sleeved on the surface of the welding pipeline, and the interior of the protective tube is equipped with a positioning component for coaxially positioning the mixing tube and the welding pipeline; the present invention realizes automatic processing of tube-sheet welding from multiple dimensions such as continuity of welding processing, protection of the pipeline substrate that has been welded, and simultaneous assembly and positioning by arranging mixing tubes, packaging tubes and positioning components, while ensuring the efficiency and quality of processing welding.

Description

Technical Field

[0001] The invention relates to the technical field of automatic welding equipment, and particularly provides automatic welding equipment for heating furnace processing. Background Art

[0002] A heating furnace is an industrial equipment that transfers heat energy to materials or media through fuel combustion or electric heating to make them reach specific temperature requirements. It is widely used in metallurgy, chemical industry, building materials, electricity, machinery and other industries. It is one of the core equipment for industrial production to realize processes such as material heating, drying, smelting and reaction. The tube sheet is a key structural component of the heating furnace, mainly used to fix and support the pipes in the heating furnace and ensure the flow path and sealing of the medium in the pipes.

[0003] There are many types of tube sheets, including flat tube sheets, convex tube sheets and shell-connected tube sheets. Tube sheets are usually provided with tube holes arranged in a certain pattern (such as regular triangle or square arrangement) for installing furnace tubes. The spacing of the tube holes needs to meet the requirements of strength and heat transfer efficiency, so the density of the tube holes will also be relatively large. The tube holes and pipelines are usually fixed by welding to ensure adequate sealing, and are used in high temperature and high pressure working conditions.

[0004] Due to the high density of pipe holes, the density of pipe arrangement will also be high, which will result in very small operating space on the side, long pipe length, and the operating space on the top will also be affected by the length of the welding gun, especially the pipe located in the middle of the fixed plate. The welding of its end is more cumbersome, so the welder needs to adjust the position to weld the pipe from multiple angles, which cannot guarantee the continuity of welding and the accuracy of welding trajectory. It will not only affect the efficiency of welding process, but also may cause the sealing of welding position to deteriorate. In addition, the high temperature generated by the flame during welding may also affect other pipes that have been welded, resulting in the problem of poor sealing. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a heating furnace processing automatic welding device, which is used to solve the problems mentioned in the above background technology.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical solutions: a heating furnace processing automatic welding equipment for welding tube sheets, comprising two circular tubular mixing tubes installed in sequence from top to bottom and rotatable to each other, the surfaces of the mixing tubes are provided with ventilation grooves running from top to bottom for conveying the gas required for brazing, the opposite ends of the two mixing tubes are provided with annular connecting grooves connecting the two ventilation grooves, and a sealing component for preventing gas leakage is provided between the two mixing tubes; the interior of the mixing tubes is equipped with a protective tube with a heat insulation function for being sleeved on the surface of the welding pipe, and the interior of the protective tube is provided with a It is equipped with a positioning component for coaxial positioning of the mixing pipe and the welding pipe. The surface of the protective pipe is equipped with a driving component for driving the protective pipe and the mixing pipe at the lower end to rotate continuously around the welding position. The surface of the mixing pipe is equipped with a packaging tube for resting on the surface of the tube plate and fixedly connected to the mixing pipe at the upper position. The interior of the protective pipe is equipped with a pulse igniter for igniting the mixed gas. The interior of the protective pipe is equipped with a wire feeding component for transmitting the welding wire to the air outlet of the ventilation groove. The air inlet position of the upper ventilation groove is installed with an air intake hose for conveying gas and a reverse flow valve for preventing gas backflow.

[0007] Preferably, the sealing assembly includes a stepped labyrinth groove opened at opposite ends of the two mixing tubes, the two labyrinth grooves are adapted to each other, and the surface of the mixing tube at the lower position is equipped with a sealing bearing connected to the packaging tube for improving sealing performance.

[0008] Preferably, the positioning assembly includes a conical positioning block assembled inside the protective tube, a plurality of guide grooves arranged along the axial direction are provided inside the protective tube, a plurality of guide blocks that are clamped in the guide grooves and slide along the axial direction are provided on the surface of the positioning block, an annular groove for clamping the guide block is provided on the surface of the positioning block, and the guide block is clamped in the annular groove and slides inside.

[0009] Preferably, the driving assembly includes a gear ring fixedly sleeved on the surface of the protective tube and a gear 1 assembled inside the packaging tube, the gear 1 and the gear ring are engaged with each other, and the surface of the protective tube is equipped with a motor for driving the gear 1 to rotate.

[0010] Preferably, the wire feeding assembly includes a wire winding wheel rotatably mounted on the surface inside the protective tube and winding the solder. The interior of the protective tube is rotatably equipped with two wire feeding wheels clamped on both sides of the solder. The two wire feeding wheels are coaxially fixed with mutually meshing gears. One of the gears is controlled to rotate by a motor, and the solder flows through the protective tube and extends to the lower end of the protective tube.

[0011] Preferably, the interior of the protective tube is equipped with two coaxially mounted round rods, and the opposite ends of the two round rods are respectively provided with an inner concave portion and an outer convex portion. The inner concave portion of the round rod is equipped with a spring, and the outer convex portion of the round rod is inserted into the inner side of the inner concave portion and installed and connected to the end of the spring.

[0012] Preferably, the lower end of the protective tube is equipped with a bent guide tube, the lower end of the solder moves through the guide tube and extends to a position on the side of the ventilation groove outlet close to the axis of the protective tube, and the surface of the guide tube is equipped with an adjustment component for controlling the distance between the solder and the tube sheet pipe.

[0013] Preferably, the adjustment assembly includes a torsion spring sleeved on the surface of the guide tube, one end of the torsion spring is fixed to the surface of the protective tube, and the other end of the torsion spring is fixed to the surface of the guide tube, and the torsion spring is in a compressed state.

[0014] Preferably, the lower end of the packaging tube is provided with a plurality of integrally formed support columns resting against the surface of the tube plate, and the outer side surfaces of the plurality of support columns are fixedly connected with an insulation tube with an insulation function for protecting non-welded pipes, and the top of the insulation tube is connected to the outside, and the bottom is connected to the inside of the packaging tube.

[0015] Preferably, the top of the packaging tube is equipped with a handle for easy holding, the surface of the protective tube is equipped with multiple limiting rings in an annular array, and the air intake hose movably passes through the limiting ring and is installed and connected to the air intake end position of the reverse flow valve.

[0016] 1. The above technical solution has the following advantages or beneficial effects: The present invention provides an automatic welding equipment for heating furnace processing. By arranging a mixing tube, a protective tube, a packaging tube and an insulation tube, the continuity is guaranteed during the rotation welding of the mixing tube, repeated welding or welding leaks are avoided, and the quality of welding can be ensured. Especially for the case where the density of pipes on the tube sheet is large, the welding of the pipe substrate located in the middle will be more convenient, and the welding efficiency of the entire tube sheet will be effectively improved. At the same time, with the use of the protective tube and the packaging tube, the welding impact on the remaining pipe substrates during welding can be effectively reduced, further ensuring the quality of welding.

[0017] 2. The above technical solution has the following advantages or beneficial effects: The present invention provides an automatic welding device for heating furnace processing. By setting a positioning block, a guide block and a guide groove, when the mixing pipe drives the guide block to move downward, the circumferential side of the guide block is evenly against the inner wall of the pipe substrate, thereby realizing the coaxial positioning of the mixing pipe and the pipe substrate, ensuring the accuracy of the welding trajectory, and realizing the positioning of the pipe substrate and the installation of the mixing pipe at the same time, thereby being able to further effectively reduce the time required for welding and improve the efficiency of the welding operation.

[0018] 3. The above technical solution has the following advantages or beneficial effects: The present invention provides an automatic welding equipment for heating furnace processing, which realizes automatic processing of tube-to-sheet welding from multiple dimensions such as continuity of welding processing, protection of the welded pipe substrate, and simultaneous assembly and positioning by setting a mixing pipe, a packaging pipe and a positioning component, while ensuring the efficiency and quality of processing and welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention and its features, configurations and advantages will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings, in which like reference numerals indicate like parts throughout the drawings, which are not drawn to scale, with emphasis placed on illustrating the subject matter of the present invention.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a heating furnace processing automatic welding equipment provided by the present invention during welding and installation.

[0021] Figure 2 It is a three-dimensional structural diagram of a heating furnace processing automatic welding equipment.

[0022] Figure 3 yes Figure 2 Schematic diagram of the three-dimensional structure from an upward perspective.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the protective tube surface.

[0024] Figure 5 It is a schematic diagram of the split three-dimensional structure of two mixing tubes.

[0025] Figure 6 yes Figure 5 Front cross-section of .

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the wire feeding assembly.

[0027] Figure 8 It is a schematic diagram of the partially disassembled three-dimensional structure of the positioning component.

[0028] Figure 9 yes Figure 8 Front cross-section of .

[0029] Figure 10 It is a top sectional view of the two round rods in the installed state.

[0030] Figure 11 It is a three-dimensional structural diagram of the installation status of the support column and the packaging tube.

[0031] Figure 12 It is a schematic diagram of the planar cross-sectional structure of the solder penetrating the protective tube.

[0032] In the figure: 1. Mixing pipe; 2. Ventilation groove; 3. Connecting groove; 4. Protective pipe; 5. Packaging pipe; 6. Pulse igniter; 7. Inlet hose; 8. Reverse flow valve; 9. Labyrinth groove; 10. Sealed bearing; 11. Positioning block; 12. Guide groove; 13. Guide block; 14. Annular groove; 15. Ring gear; 16. Gear 1; 17. Winding wheel; 18. Wire feeding wheel; 19. Gear 2; 20. Round rod; 21. Spring; 22. Guide pipe; 23. Torsion spring; 24. Support column; 25. Insulation pipe; 26. Handle; 27. Limiting ring. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0034] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Figure 1 This is a schematic diagram of the state of the automatic welding equipment for heating furnace processing when welding the tube plate inside the heating furnace. The automatic welding equipment for heating furnace processing is a brazing equipment, which heats and melts the solder and uses the capillary capacity of the solder to act on the welding position to ensure the firmness of the welding. However, it is necessary to ensure that the melting point of the solder is lower than the melting point of the welding base material.

[0036] Figure 2 Disclosed is a heating furnace processing automatic welding equipment, such as Figure 2 、 Figure 4-Figure 6 As shown, it includes two mixing tubes 1 for transmitting the mixed gas required for brazing. The inner diameter and outer diameter of the two mixing tubes 1 are exactly the same. The two mixing tubes 1 are spliced ​​and installed from top to bottom. The surface of the mixing tube 1 is provided with a ventilation groove 2 parallel to its axis, and the ventilation groove 2 is connected to the outside of the mixing tube 1. The lower end of the upper mixing tube 1 and the upper end of the lower mixing tube 1 are both provided with a connecting groove 3. The two connecting grooves 3 are combined into a complete circular ring, and the two ventilation grooves 2 are internally connected through the connecting groove 3. The interior of the ventilation groove 2 and the connecting groove 3 is used to transport the mixed gas. The outlet end of the ventilation groove 2 of the lower mixing tube 1 is bent and close to the side of the axis of the mixing tube 1.

[0037] A reverse flow valve 8 is installed at the air inlet of the ventilation groove 2 at the upper position to prevent the mixed gas from flowing back. An air intake hose 7 is installed at the air inlet of the reverse flow valve 8. The gas enters the upper ventilation groove 2, the connecting groove 3 and the lower ventilation groove 2 in sequence from the inside of the air intake hose 7 and is finally discharged. A pulse igniter 6 and a wire feeding assembly are installed above the discharge position. The pulse igniter 6 is controlled by a power supply so that the mixed gas is ignited to burn and melt the solder, thereby realizing the welding of the base material.

[0038] During use, the mixing tube 1 is sleeved from top to bottom on the surface of the pipe substrate to be welded, and the mixing tube 1 and the wire feeding assembly below are continuously rotated to melt the solder at the welding position. During this process, the welding is continuous, and repeated welding or leaking welding is avoided, which can ensure the quality of welding. Especially for the case where the pipe density on the tube sheet is large, the welding of the pipe substrate located in the middle will be more convenient, which effectively improves the welding efficiency of the entire tube sheet.

[0039] like Figure 3 、 Figure 4 、 Figure 8 and Figure 9 As shown, a protective tube 4 with a heat-insulating function is assembled inside the mixing tube 1. The protective tube 4 protects the pipeline base material and reduces the influence of high heat on the internal stress of the pipeline base material. The protective tube 4 is fixedly connected to the mixing tube 1 below. A driving component is installed on the surface of the protective tube 4 to realize the rotation of the mixing tube 1 below. In order to further improve the quality of welding and ensure the accuracy of the welding position of the base material, a positioning component is installed inside the protective tube 4 to ensure that the mixing tube 1 and the pipeline base material are in a coaxial state before welding.

[0040] The positioning assembly includes a truncated cone-shaped positioning block 11. The positioning block 11, the mixing pipe 1, and the protective pipe 4 are all in a coaxial state. In this embodiment, three guide blocks 13 are provided on the circumference of the positioning block 11. Three guide grooves 12 parallel to the axial direction of the protective pipe 4 are provided inside. One end of the guide block 13 is stuck in the guide groove 12 and slides inside. When the mixing pipe 1 is assembled and used from top to bottom, the positioning block 11 will first contact the pipe base material. During the downward movement of the mixing pipe 1, the circumference of the positioning block 11 is evenly against the inner wall of the pipe base material, so that the positioning block 11 is coaxially positioned with the pipe substrate, thereby ensuring the coaxial positioning of the mixing pipe 1 and the pipe substrate. When the positioning block 11 is against the inner wall of the pipe substrate, the mixing pipe 1 continues to move downward. During this process, the positioning block 11 is pushed upward by the top of the pipe substrate, and the guide block 13 slides inside the guide groove 12. Therefore, it can be suitable for pipe substrates of different lengths and diameters. Since the positioning of the pipe substrate and the installation of the mixing pipe 1 are achieved at the same time, the time required for welding can be effectively reduced, thereby improving the efficiency of the welding operation.

[0041] Since the protective tube 4 and the lower gas mixing tube 1 need to rotate for a long time during the welding process, in order to avoid damage to the pipe base material caused by the rotation of the positioning block 11 as much as possible, an annular groove 14 is opened on the peripheral side of the positioning block 11, and the other end of the guide block 13 is clamped inside the annular groove 14. At this time, when the protective tube 4 rotates, it will only drive the guide block 13 to rotate inside the annular groove 14, and the pipe base material will not be affected.

[0042] like Figure 2 、 Figure 4 and Figure 11 As shown, in order to facilitate the installation of the driving assembly, a packaging tube 5 mounted on the bearing of the mixing tube 1 is assembled on the surface of the mixing tube 1. The driving assembly includes a ring gear 15 fixedly sleeved on the surface of the protective tube 4, and a gear 16 rotatably mounted inside the packaging tube 5. The gear 16 is engaged with the ring gear 15. The gear 16 is controlled to rotate by an external motor. The gear 16 drives the ring gear 15 to rotate, thereby realizing the rotation of the protective tube 4.

[0043] like Figure 5-Figure 7 As shown, since the two mixing tubes 1 can rotate relative to each other, in order to avoid the overflow of the mixed gas as much as possible, a sealing assembly is provided at the connection position of the two mixing tubes 1 to improve the airtightness. The sealing assembly includes a labyrinth groove 9 opened at the opposite ends of the two mixing tubes 1. The labyrinth groove 9 is stepped and adapted to each other. The packaging tube 5 is fixedly connected to the upper mixing tube 1, and a sealing bearing 10 with sealing performance (using existing technology) is fixedly sleeved on the surface of the lower mixing tube 1. The outer surface of the sealing bearing 10 is fixedly connected to the inner wall of the packaging tube 5.

[0044] like Figure 2 、 Figure 3 、 Figure 7 and Figure 10 As shown, the wire feeding assembly includes a winding wheel 17 rotatably mounted inside the protective tube 4, the solder is wound on the surface of the winding wheel 17, and one end of the solder moves through the protective tube 4 and extends to the bottom, see Figure 12In order to improve the smoothness of the movement of the solder in the protective tube 4, a ball bearing can be installed at the contact position between the protective tube 4 and the solder. Two wire feeding wheels 18 clamped on both sides of the solder are rotatably installed inside the protective tube 4. The wire feeding wheels 18 are coaxially fixed with gear 2 19. The two gears 2 19 are meshed with each other. One of the gears 2 19 is driven by a motor (not shown in the figure). The rotation of the two gears 2 19 drives the wire feeding wheels 18 to rotate. In order to facilitate the replacement and installation of the wire winding wheel 17, two coaxially installed round rods 20 are installed inside the protective tube 4. One end of one of the round rods 20 is facing The outer protrusion forms a convex shaft, and one end of the other round rod 20 is recessed inward to form a groove. A spring 21 is installed inside the groove. The convex shaft is movably inserted into the inside of the groove, and one end of the convex shaft is fixed to one end of the spring 21. The other ends of the two round rods 20 are movably inserted into the inside of the protective tube 4, and the winding wheel 17 is sleeved between the two round rods 20. Specifically, the winding wheel 17 is fixedly connected to the round rod 20 with the convex shaft and slidably connected to the round rod 20 with the groove. When disassembling, the two round rods 20 are moved relative to each other. The winding wheel 17 can be taken out by removing the round rod 20 from the inside of the protective tube 4.

[0045] In order to ensure that the solder can accurately fall on the welding position when it melts and adapt to pipe substrates of different diameters, a bent guide tube 22 is installed at the lower end of the protective tube 4. The lower end of the solder can move through the guide tube 22, and the lower end of the solder is located at a position on the side of the axis of the protective tube 4 near the outlet of the ventilation groove 2. An adjustment component is installed on the surface of the guide tube 22 so that the lower end of the solder is located at the welding position. The adjustment component includes a torsion spring 23 sleeved on the surface of the guide tube 22. One end of the torsion spring 23 is fixed to the surface of the protective tube 4, and the other end of the torsion spring 23 is fixed to the surface of the guide tube 22. The torsion spring 23 is in a compressed state, so that the guide tube 22 is against the surface of the pipe substrate. Since the guide tube 22 itself has a certain thickness, the solder will not completely against the surface of the pipe substrate, but is located above the welding position. When the mixed gas is ignited, the melted solder will fall on the welding position.

[0046] The guide tube 22 and the solder position are adaptively adjusted by the torsion spring 23, and can be used for pipe substrates with different diameters without manual adjustment, which saves time during welding and improves welding efficiency.

[0047] like Figure 2 and Figure 11As shown, since the high heat generated during the process of igniting the mixed gas welding may affect the welding position of the pipe substrate that has been welded, in order to ensure the welding quality, in this embodiment, three support columns 24 integrally formed with it are provided at the lower end of the packaging tube 5. The support columns 24 are against the plate surface of the tube plate, and the outer sides of the three support columns 24 are fixedly connected with an insulation tube 25 with a heat insulation function. There is a gap between the insulation tube 25 and the packaging tube 5, and the top of the insulation tube 25 is connected to the outside, and the bottom of the insulation tube 25 is connected to the inside of the packaging tube 5. During welding, not only can the balance of internal and external air pressure be guaranteed, but also the surrounding pipe substrate can be thermally protected, thereby ensuring the welding quality.

[0048] like Figure 2 and Figure 4 As shown, during welding, since the protective tube 4 needs to rotate one circle, in order to ensure that the mixed gas can be welded smoothly, a plurality of limiting rings 27 in a circular array are fixedly installed on the surface of the protective tube 4, and the air intake hose 7 is movable through the limiting ring 27. It should be noted that the air intake hose 7 is wound into a complete circle. During the welding process, the protective tube 4 needs to be rotated alternately forward and backward in sequence to avoid the air intake hose 7 from winding itself and ensure the smooth entry of the mixed gas.

[0049] At the same time, in order to facilitate the operation of the automatic welding equipment for heating furnace processing, a handle 26 is fixedly installed on the top of the packaging tube 5 for easy holding. The switches for rotating the wire feeding assembly and the protective tube 4 are both located on the handle 26, and the switch of the pulse igniter 6 is also located on the handle 26 (the installation and connection method of the switch adopts the existing technology and will not be repeated here).

[0050] During welding, the handle 26 is held and the packaging tube 5 is inserted into the surface of the pipe substrate to be welded. During this process, the positioning block 11 first rests on the inner wall of the pipe substrate, and then the packaging tube 5 drives the mixing tube 1 to continue to move downward. The positioning block 11 is pushed upward by the top of the pipe substrate, and the guide block 13 slides to the highest position of the pipe substrate inside the guide groove 12. During the downward movement of the mixing tube 1, the torsion spring 23 squeezes the guide tube 22 against the surface of the pipe substrate. Since the guide tube 22 itself has a certain thickness, the end of the solder is located directly above the required welding position. At this time, the reverse flow valve 8 is opened to fill the interior of the mixing tube 1 with mixed gas. The gas passes through the upper ventilation groove 2, the connecting groove 3 and the lower ventilation groove 2 to reach the outlet position. The button of the pulse igniter 6 on the control handle 26 is pressed to ignite the mixed gas for welding. At the same time, the buttons of the wire feeding assembly and the drive rod assembly are turned on, and the wire feeding and the protective tube 4 are rotated at the same time to achieve circumferential welding. After welding is completed, the gas supply to the mixing tube 1 can be stopped, and the packaging tube 5 can be removed for welding the next position.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0052] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0053] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A heating furnace processing automatic welding equipment for welding tube sheets, characterized by: The invention comprises two circular tubular mixing pipes which are installed sequentially from top to bottom and can rotate with each other. The surfaces of the mixing pipes are provided with ventilation grooves which penetrate from top to bottom and are used to transport the gas required for brazing. The opposite ends of the two mixing pipes are provided with an annular connecting groove which connects the two ventilation grooves. A sealing assembly is provided between the two mixing pipes to prevent gas leakage. The interior of the gas mixing pipe is equipped with a heat-insulating protective pipe for sleeved on the surface of the welding pipe. The interior of the protective pipe is equipped with a positioning assembly for coaxially positioning the gas mixing pipe and the welding pipe. The surface of the protective pipe is equipped with a driving assembly for driving the protective pipe and the gas mixing pipe at the lower end to continuously rotate around the welding position. The surface of the gas mixing pipe is equipped with a packaging tube for abutting against the surface of the tube sheet and fixedly connected to the gas mixing pipe above. The interior of the protective tube is equipped with a pulse igniter for igniting the mixed gas. The interior of the protective tube is equipped with a wire feeding assembly for transmitting the welding wire to the gas outlet of the ventilation groove. The gas inlet position of the ventilation groove above is equipped with an intake hose for conveying gas and a reverse flow valve for preventing gas backflow. The positioning assembly includes a truncated cone-shaped positioning block assembled inside the protective tube, a plurality of guide grooves arranged along the axial direction are provided inside the protective tube, a plurality of guide blocks that are clamped in the guide grooves and slide along the axial direction are assembled on the surface of the positioning block, an annular groove for clamping the guide block is provided on the surface of the positioning block, and the guide block is clamped in the annular groove and slides.

2. The automatic welding equipment for heating furnace processing according to claim 1, characterized in that: The sealing assembly includes a stepped labyrinth groove opened at opposite ends of the two mixing tubes. The two labyrinth grooves are adapted to each other. The surface of the mixing tube at the lower position is equipped with a sealing bearing connected to the packaging tube for improving the sealing performance.

3. The automatic welding equipment for heating furnace processing according to claim 1, characterized in that: The driving assembly includes a gear ring fixedly sleeved on the surface of the protective tube and a gear 1 assembled inside the packaging tube. The gear 1 and the gear ring are engaged with each other. The surface of the protective tube is equipped with a motor for driving the gear 1 to rotate.

4. The automatic welding equipment for heating furnace processing according to claim 1, characterized in that: The wire feeding assembly includes a wire winding wheel rotatably installed on the surface inside the protective tube and winding the solder. The interior of the protective tube is rotatably equipped with two wire feeding wheels clamped on both sides of the solder. The two wire feeding wheels are coaxially fixed with mutually meshing gears. One of the gears is controlled to rotate by a motor, and the solder flows through the protective tube and extends to the lower end of the protective tube.

5. The automatic welding equipment for heating furnace processing according to claim 4, characterized in that: The interior of the protective tube is equipped with two coaxially mounted round rods, and the opposite ends of the two round rods are respectively provided with an inner concave portion and an outer convex portion. The inner concave portion of the round rod is equipped with a spring, and the outer convex portion of the round rod is inserted into the inner side of the inner concave portion and is installed and connected to the end of the spring.

6. The automatic welding equipment for heating furnace processing according to claim 4, characterized in that: The lower end of the protective tube is equipped with a bent guide tube, and the lower end of the solder moves through the guide tube and extends to a position on the side of the ventilation groove outlet close to the axis of the protective tube. The surface of the guide tube is equipped with an adjustment component for controlling the distance between the solder and the tube sheet pipe.

7. The automatic welding equipment for heating furnace processing according to claim 6, characterized in that: The adjustment assembly includes a torsion spring sleeved on the surface of the guide tube, one end of the torsion spring is fixed on the surface of the protective tube, and the other end of the torsion spring is fixed on the surface of the guide tube, and the torsion spring is in a compressed state.

8. The automatic welding equipment for heating furnace processing according to claim 1, characterized in that: The lower end of the packaging tube is provided with a plurality of integrally formed support columns resting against the surface of the tube sheet. The outer sides of the plurality of support columns are fixedly connected with an insulation tube with an insulation function for protecting non-welded pipes. The top of the insulation tube is connected to the outside, and the bottom is connected to the inside of the packaging tube.

9. The automatic welding equipment for heating furnace processing according to claim 1, characterized in that: The top of the packaging tube is equipped with a handle for easy holding, the surface of the protection tube is equipped with multiple limiting rings in an annular array, and the air intake hose movably passes through the limiting ring and is installed and connected to the air intake end position of the reverse flow valve.

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