A bellows welding device

Abstract

The present application relates to welding fixing device technical field, especially a kind of corrugated pipe welding device, including rack and the corrugated pipe fixing mechanism and flange fixing mechanism of installation on rack;Corrugated pipe fixing mechanism is used to fix corrugated pipe, and corrugated pipe fixing mechanism includes mounting seat, air pump, heater, air bag and several fixed rods, mounting seat and rack fixed connection, fixed rod and mounting seat sliding connection, fixed rod is distributed along the circumference of mounting seat interval, the center of mounting seat is provided with air passage, air bag and mounting seat fixed connection;Through the inner fixing structure of air bag and fixed rod, corrugated pipe can be effectively fixed, prevent it from shaking in welding process, to improve the stability and welding quality of welding;Hot air in air bag preheats corrugated pipe, help to eliminate welding stress.

Description

Technical Field

[0001] This invention relates to the field of welding and fixing equipment technology, and in particular to a corrugated pipe welding device. Background Technology

[0002] In industrial piping systems, the connection between bellows and flanges is a common structural form, and its stability and sealing performance are crucial to the safe operation of the entire system. Traditional welding methods have some significant shortcomings when connecting bellows and flanges. During the welding process, due to the flexible nature of the bellows, it is prone to shaking due to uneven heating or external forces. This not only affects the weld quality but may also cause deformation of the bellows after welding, affecting its sealing performance. Furthermore, after the bellows and flange are directly welded, the heat effect during the welding process generates significant welding stress within the material. If this stress is not effectively released, its long-term presence will accelerate fatigue failure of the material and shorten the service life of the bellows.

[0003] In existing technologies, the welding and fixing of bellows to flanges typically relies on external clamps or support structures. These structures are often bulky and difficult to adjust, making it hard to accommodate bellows of different sizes and shapes. Furthermore, these external structures may cause additional stress concentration on the bellows during the welding process, further increasing welding stress. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the technical problems in the prior art where the flexible characteristics of the corrugated pipe cause it to wobble easily during the welding process, affecting the welding quality and sealing performance, as well as the problem that the large welding stress generated after the direct welding of the corrugated pipe and the flange is not effectively released, which accelerates the material fatigue failure and shortens the service life. The present invention provides a corrugated pipe welding device.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a corrugated pipe welding device, including a frame and a corrugated pipe fixing mechanism and a flange fixing mechanism installed on the frame;

[0006] The bellows fixing mechanism is used to fix the bellows. It includes a mounting base, an air pump, a heater, an air bladder, and several fixing rods. The mounting base is fixedly connected to the frame, and the fixing rods are slidably connected to the mounting base. The fixing rods are spaced apart circumferentially around the mounting base. A ventilation channel is provided at the center of the mounting base. The air bladder is fixedly connected to the mounting base and surrounds the right end of the ventilation channel. The air bladder provides power for the radial movement of the fixing rods along the mounting base and also serves to press against the inner wall of the bellows. The heater heats the air. The output end of the air pump is connected to the input end of the heater, and the output end of the heater communicates with the air bladder. The air pump blows air into the air bladder, causing it to inflate. Through the internal fixing structure of the air bladder and fixing rods, the bellows can be effectively fixed, preventing it from shaking during welding, thereby improving welding stability and quality. It also simplifies welding operations, reduces manual intervention, and improves welding efficiency.

[0007] The hot air inside the airbag preheats the bellows, which helps to eliminate welding stress, reduce welding deformation, and improve the strength and reliability of the welded joint.

[0008] The flange fixing mechanism is used to fix the flange.

[0009] Welding equipment is used for welding bellows and flanges.

[0010] To address the issue of unstable sliding of the fixed rod, the mounting base is further provided with a radially extending groove, and the fixed rod has a sliding seat that matches the groove. The groove and the sliding seat correspond one-to-one, and the sliding seat is slidably arranged within its corresponding groove.

[0011] To address the issue of asynchronous movement of multiple fixed rods, which hinders the positioning of the bellows' central axis, the bellows fixing mechanism further includes a linkage assembly. This linkage assembly connects the fixed rods, enabling synchronous radial movement. The linkage assembly comprises a sliding sleeve, several connecting rods, and several transmission rods. Each connecting rod corresponds to a slide block, and the connecting rod is fixedly connected to its corresponding slide block. A connecting portion protrudes from the left end face of the mounting base, surrounding the vent. The sliding sleeve and the connecting portion are slidably connected. Each transmission rod corresponds to a connecting rod, with one end rotatably connected to its corresponding connecting rod and the other end rotatably connected to the sliding sleeve.

[0012] The flange fixing mechanism includes a chuck and a first lateral drive member. The chuck is used to hold the flange, and the first lateral drive member is used to provide power for the flange on the chuck to move closer to or away from the bellows. The first lateral drive member is fixedly connected to the frame, and the output end of the first lateral drive member is fixedly connected to the chuck.

[0013] To address the issue of significant welding stress generated after welding the bellows and flanges, which is not effectively released and accelerates material fatigue failure, and the need for circumferential hammering due to the circular weld seam, the welding fixture further includes a stress relief device mounted on a frame. The stress relief device includes a hammer and a drive assembly. The hammer is used to strike the weld seam of the bellows and flanges, and the drive assembly provides power for the circumferential rotation of the hammer and for the hammer to strike the weld seam of the bellows and flanges.

[0014] The drive assembly further includes a gear ring, a sun gear, a mounting bracket, a connecting bracket, a second lateral drive element, a radial drive element, a transmission gear, a motor, and planetary gears;

[0015] The second lateral drive is used to provide power for the lateral movement of the hammer. The second lateral drive is fixedly connected to the frame, and the output end of the second lateral drive is fixedly connected to the mounting bracket.

[0016] The mounting bracket has a first through hole for the flange fixing mechanism to pass through, and the sun gear is fixedly connected to the mounting bracket.

[0017] The sun gear has a second through hole for the flange fixing mechanism to pass through;

[0018] The gear ring has teeth on both its inner and outer rings, and the gear ring and the mounting bracket are rotatably connected.

[0019] The planet gear meshes with the sun gear, and the planet gear meshes with the inner ring of the gear ring. The planet gear is rotatably connected to the connecting frame, and the connecting frame is rotatably connected to the mounting frame.

[0020] The outer ring of the transmission gear meshes with the outer ring of the gear ring, and the output shaft of the motor is connected to the transmission gear.

[0021] The radial drive and the transmission gear are fixedly connected, and the hammer is arranged on the output end of the radial drive. The radial drive is used to provide power for the radial movement of the hammer.

[0022] It further includes an elastic connection between the hammer and the radial drive, with a spring arranged between the output end of the hammer and the radial drive.

[0023] The device further includes a sliding cavity on the frame and a slider that matches the sliding cavity on the mounting bracket, with the slider and the sliding cavity being slidably connected.

[0024] To address the issue of insufficient stability of the bellows in the airbag fixation system, the system further includes protrusions on the airbag that match the bellows.

[0025] The welding mechanism further includes a welding bracket, a welding motor, a welding gear, a welding gear ring, a third lateral drive component, a welding radial drive component, and a welding torch. The welding bracket and the frame are slidably connected, the third lateral drive component and the frame are fixedly connected, the output end of the third lateral drive component and the welding bracket are fixedly connected, the welding gear ring and the welding bracket are rotatably connected, the welding gear and the welding gear ring mesh, the output shaft of the welding motor and the welding gear are drivenly connected, the welding radial drive component and the welding gear ring are fixedly connected, and the output end of the welding radial drive component and the welding torch are drivenly connected.

[0026] The beneficial effects of the present invention are: the corrugated pipe welding device provided by the present invention can effectively fix the corrugated pipe through the internal fixing structure of the air bag and the fixing rod, prevent it from shaking during the welding process, thereby improving the welding stability and welding quality, and can also simplify the welding operation, reduce manual intervention, and improve welding efficiency.

[0027] The hot air inside the airbag preheats the bellows, which helps to eliminate welding stress, reduce welding deformation, and improve the strength and reliability of the welded joint.

[0028] This device is suitable for welding bellows and flanges of different sizes and shapes, and has strong versatility and adaptability. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is the present invention. Figure 1 Enlarged structural diagram at point A;

[0032] Figure 3 This is the present invention. Figure 1 Enlarged structural diagram at point B;

[0033] Figure 4 This is a right-side view of the mounting base of the present invention.

[0034] Figure 5 This is a structural schematic diagram of the arrangement of the bellows and flanges according to the present invention;

[0035] Figure 6 This is a right-side view of the structure of the bellows after the fixing rod of the present invention abuts against the bellows;

[0036] Figure 7 This is a schematic diagram of the structure of the welding mechanism near the contact point between the bellows and the flange after the bellows and flange come into contact.

[0037] Figure 8This is a schematic diagram of the structure of the present invention, showing the arrangement of the striking hammer near the welded joint of the bellows and the flange;

[0038] Figure 9 This is a schematic diagram of the structure of the present invention, which arranges the hammer to strike the welded joint of the bellows and the flange.

[0039] In the diagram: 1. Frame; 11. Sliding cavity.

[0040] 2. Bellows fixing mechanism; 21. Mounting base; 211. Vent duct; 212. Slide groove; 213. Connecting part; 22. Air pump; 23. Heater; 24. Airbag; 241. Protrusion; 242. One-way valve; 243. Pressure relief valve; 25. Fixing rod; 251. Slide seat; 26. Linkage assembly; 261. Sliding sleeve; 262. Connecting rod; 263. Transmission rod.

[0041] 3. Flange fixing mechanism; 31. Chuck; 32. First transverse drive component;

[0042] 4. Welding mechanism; 41. Welding bracket; 42. Welding motor; 43. Welding gear; 44. Welding gear ring; 45. Third transverse drive component; 46. Welding radial drive component; 47. Welding torch.

[0043] 5. Stress relief device; 51. Striking hammer; 52. Drive assembly; 521. Gear ring; 522. Sun gear; 5221. Second through hole; 523. Mounting bracket; 5231. First through hole; 5232. Slider; 524. Connecting bracket; 525. Second transverse drive component; 526. Radial drive component; 527. Transmission gear; 528. Motor; 529. Planetary gear; 53. Spring.

[0044] 6. Corrugated pipe;

[0045] 7. Flange. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0047] like Figure 1 This is a schematic diagram of the structure of the present invention. A corrugated pipe welding device includes a frame 1, a corrugated pipe fixing mechanism 2 and a flange fixing mechanism 3 mounted on the frame 1.

[0048] like Figure 1 , Figure 2As shown, the bellows fixing mechanism 2 is used to fix the bellows. The bellows fixing mechanism 2 includes a mounting base 21, an air pump 22, a heater 23, an air bag 24, and several fixing rods 25. The mounting base 21 is fixedly connected to the frame 1, and the fixing rods 25 are slidably connected to the mounting base 21. The fixing rods 25 are distributed circumferentially around the mounting base 21. In this application, four fixing rods 25 are arranged, but the application does not make a specific limitation on their number. Three or more fixing rods 25 can also be installed. A ventilation channel 211 is opened in the center of the mounting base 21. The air bag 24 is fixedly connected to the mounting base 21, and the air bag 24 surrounds the right end port of the ventilation channel 211, so that the air bag 24 can receive the air output from the ventilation channel 211 and expand. The air bag 24 is used to provide power for the radial movement of the fixing rods 25 along the mounting base 21 and to abut against the inner wall of the bellows 6. During the expansion process, the air bag 24 pushes the fixing rods 25 to move radially until the fixing rods 25 abut against the inner wall of the bellows 6. The airbag 24 has a protrusion 241 that matches the bellows 6. After the airbag 24 is inflated, the protrusion 241 on the airbag 24 can fit the corrugated section on the bellows 6 to further enhance the fixation. The heater 23 is located in the air passage 211. The heater 23 is used to heat the air. The heater 23 is fixedly connected to the frame 1. The output end of the air pump 22 is connected to the input end of the heater 23. The output end of the heater 23 is connected to the airbag 24. The heater 23 and the air pump 22 are connected by an air pipe. The heater 23 and the one-way valve 242 are connected by an air pipe. The air pump 22 is fixedly connected to the frame 1. The air pump 22 is used to blow air into the airbag 24, causing the airbag 24 to inflate. The air pump 22 continuously introduces air into the airbag 24. Through the internal fixing structure of the airbag 24 and the fixing rod 25, the bellows 6 can be effectively fixed to prevent it from shaking during the welding process, thereby improving the stability and quality of the welding. It can also simplify the welding operation, reduce manual intervention, and improve the welding efficiency.

[0049] The air bladder 24 is filled with hot air to preheat the bellows 6, which helps to eliminate welding stress, reduce welding deformation, and improve the strength and reliability of the welded joint. During the process of fixing the bellows 6, the preheating of the bellows 6 is completed simultaneously, thereby reducing welding stress.

[0050] The airbag 24 has a one-way valve 242 and a pressure relief valve 243. Both the one-way valve 242 and the pressure relief valve 243 are located in the air passage 211. Both the one-way valve 242 and the pressure relief valve 243 are electromagnetic control valves. The input end of the one-way valve 242 is connected to the output end of the heater 23. The one-way valve 242 allows the air output by the air pump 22 to enter the airbag 24 in one direction. The pressure relief valve 243 allows the excess gas to be released after the pressure inside the airbag 24 reaches a certain pressure.

[0051] like Figure 1 , Figure 2As shown, the mounting base 21 has a radially extending groove 212, and the fixing rod 25 has a sliding seat 251 that matches the groove 212. The groove 212 and the sliding seat 251 correspond one-to-one. The sliding seat 251 is slidably arranged in its corresponding groove 212. The design of the sliding seat 251 and the groove 212 can increase the stability of the fixing rod 25.

[0052] like Figure 1 , Figure 2 As shown, the bellows fixing mechanism 2 also includes a linkage assembly 26. The linkage assembly 26 is used to connect the fixing rod 25, so that the fixing rod 25 moves radially synchronously. The linkage assembly 26 includes a sliding sleeve 261, several connecting rods 262 and several transmission rods 263. The connecting rods 262 and the slides 251 correspond one-to-one. The connecting rods 262 and their corresponding slides 251 are fixedly connected. A connecting part 213 protrudes from the left end face of the mounting base 21. The connecting part 213 surrounds the vent 211. The sliding sleeve 261 and the connecting part 213 slide together. The transmission rod 263 and the connecting rod 262 are connected in a one-to-one manner. One end of the transmission rod 263 is rotatably connected to its corresponding connecting rod 262, and the other end is rotatably connected to the sliding sleeve 261. The linkage component 26 connects all the fixed rods 25 so that the fixed rods 25 can move synchronously. On the one hand, the fixed rods 25 synchronously contact the inner wall surface of the bellows 6. On the other hand, it can realize the positioning of the bellows 6, so that after the bellows 6 is fixed, the central axis of the bellows 6 is coaxial with the central axis of the chuck 31 of the flange fixing mechanism 3.

[0053] During the radial outward movement of the fixed rod 25, the slide block 251 also moves radially outward. The slide block 251 drives the connecting rod 262 to move. The connecting rod 262 drives the sliding sleeve 261 to slide on the connecting part 213 through the transmission rod 263. Since the transmission rod 263 is connected to the sliding sleeve 261, the fixed rod 25 moves synchronously.

[0054] like Figure 1 As shown, the flange fixing mechanism 3 is used to fix the flange 7. The flange fixing mechanism 3 includes a chuck 31 and a first transverse drive member 32. The chuck 31 can be a three-jaw chuck. The clamping surface of the chuck 31 is located on the left end face of the chuck 31. The chuck 31 is used to clamp the flange. The first transverse drive member 32 is used to provide power for the flange 7 on the chuck 31 to move closer to or away from the bellows 6. The first transverse drive member 32 is fixedly connected to the frame 1. The output end of the first transverse drive member 32 is fixedly connected to the chuck 31. The first transverse drive member 32 can be a power device such as a cylinder, hydraulic cylinder, or screw drive mechanism. The first transverse drive member 32 drives the flange 7 on the chuck 31 to move closer to the end of the bellows 6 and make the flange 7 contact the bellows 6, which facilitates subsequent welding.

[0055] like Figure 1 , Figure 3As shown, the welding fixture also includes a stress relief device 5 arranged on the frame 1. The stress relief device 5 includes a hammer 51 and a drive assembly 52. ​​The hammer 51 is used to strike the weld joint of the bellows 6 and the flange 7. The drive assembly 52 is used to provide power for the circumferential rotation of the hammer 51 and for the hammer 51 to strike the weld joint of the bellows 6 and the flange 7. The hammer 51 is arranged at an angle, making it easier for it to contact the weld joint of the bellows 6 and the flange 7.

[0056] The drive assembly 52 includes a gear ring 521, a sun gear 522, a mounting bracket 523, a connecting bracket 524, a second transverse drive member 525, a radial drive member 526, a transmission gear 527, a motor 528, and planetary gears 529.

[0057] The second lateral drive 525 is used to provide power for the lateral movement of the hammer 51. The second lateral drive 525 is fixedly connected to the frame 1. The output end of the second lateral drive 525 is fixedly connected to the mounting bracket 523. The second lateral drive 525 can be a power device such as a cylinder, hydraulic cylinder, or screw drive mechanism.

[0058] The mounting bracket 523 has a first through hole 5231 for the flange fixing mechanism 3 to pass through. The sun gear 522 is fixedly connected to the mounting bracket 523, and the sun gear 522 plays a limiting and guiding role.

[0059] The sun gear 522 has a second through hole 5221 for the flange 7 fixing mechanism 3 to pass through. The first through hole 5231 and the second through hole 5221 enable the flange fixing mechanism 3 to move laterally, avoiding interference with its operation.

[0060] The gear ring 521 has teeth on both its inner and outer rings, and the gear ring 521 is rotatably connected to the mounting bracket 523;

[0061] Planetary gear 529 meshes with sun gear 522, and planetary gear 529 meshes with the inner ring of gear 521. Planetary gear 529 is rotatably connected to connecting bracket 524, and connecting bracket 524 is rotatably connected to mounting bracket 523.

[0062] The outer ring of the transmission gear 527 meshes with the outer ring of the gear ring 521, and the output shaft of the motor 528 is connected to the transmission gear 527. The motor 528 is used to provide power for the circumferential rotation of the planetary gear 529 around the sun gear 529 and its own rotation.

[0063] The radial drive 526 and the transmission gear 527 are fixedly connected. The hammer 51 is arranged on the output end of the radial drive 526. The radial drive 526 is used to provide power for the radial movement of the hammer 51. The radial drive 526 can be a power device such as a cylinder, hydraulic cylinder, or screw drive mechanism.

[0064] The hammer 51 and the radial drive 526 are elastically connected. A spring 53 is arranged between the output end of the hammer 51 and the radial drive 526, which can make the hammer 51 elastically retract after the hammering is completed, so as to prevent the hammer 51 from getting stuck.

[0065] A sliding cavity 11 is provided on the frame 1, and a slider 5232 matching the sliding cavity 11 is arranged on the mounting bracket 523. The slider 5232 and the sliding cavity 11 are slidably connected. The design of the sliding cavity 11 and the slider 5232 enables the stress relief device 5 to move stably.

[0066] Welding mechanism 4 is used for welding bellows and flanges. Welding mechanism 4 includes a welding support 41, a welding motor 42, a welding gear 43, a welding gear ring 44, a third transverse drive component 45, a welding radial drive component 46, and a welding torch 47. The welding support 41 is slidably connected to the frame 1. The welding support 41 has a welding slider that matches the sliding cavity 11. The welding slider and the sliding cavity 11 are slidably connected. The third transverse drive component 45 is fixedly connected to the frame 1. The third transverse drive component 45 can be a power device such as a cylinder, hydraulic cylinder, or screw drive mechanism. The output end of the third transverse drive component 45... The welding torch 47 is fixedly connected to the welding bracket 41. The third lateral drive component 45 provides power for the lateral movement of the welding torch 47. The welding gear ring 44 is rotatably connected to the welding bracket 41. The welding gear 43 meshes with the welding gear ring 44. The output shaft of the welding motor 42 is driven by the welding gear 43. The welding radial drive component 46 is fixedly connected to the welding gear ring 44. The output end of the welding radial drive component 46 is driven by the welding torch 47. The welding radial drive component 46 can be a power device such as a cylinder, hydraulic cylinder, or screw drive mechanism. The welding radial drive component 46 provides power for the radial movement of the welding torch 47.

[0067] In the initial state, the slide 251 on the fixed rod 25 is located at one end of the slide groove 212 near the air passage 211. At this time, the diameter of the circle where the fixed rod 25 is located is smaller than the diameter of the bellows 6.

[0068] When fixing the bellows 6, the bellows 6 is sleeved on the airbag 24 and its fixing rod 25 (e.g. Figure 5 As shown), heater 23 starts heating air, and air pump 22 starts to circulate air. Air pump 22 blows air into airbag 24. After hot air is blown into airbag 24, airbag 24 expands, causing fixed rod 25 to move radially outward. Due to the presence of linkage component 26, fixed rod 25 moves synchronously. Slide groove 212 guides fixed rod 25, and slide block 251 moves along slide groove 212. During the expansion of airbag 24, since hot air is blown in, preheating of bellows 6 can be carried out simultaneously. Airbag 24 continues to expand until fixed rod 25 abuts against the inner wall of bellows 6 (as shown). Figure 6As shown), and the protrusion 241 on the airbag 24 is embedded in the corrugated section of the bellows 6, thereby fixing the bellows 6 (as shown). Figure 5 As shown), the synchronous movement of the fixing rod 25 can also achieve the positioning of the bellows 6, so that the central axis of the bellows 6 and the central axis of the chuck 31 are coaxial.

[0069] When fixing flange 7, flange 7 is clamped by chuck 31. After flange 7 is clamped, the central axis of flange 7 and the central axis of chuck 31 are coaxial, that is, the central axis of flange 7 and the central axis of bellows 6 are coaxial. The first transverse drive member 32 is activated to drive flange 7 close to bellows 6 until it contacts bellows 6. The contact point between bellows 6 and flange 7 is the welding point, and the contact point has a circumferential structure. At this time, welding can begin.

[0070] During welding by the welding mechanism 4 and when the flange fixing mechanism 3 passes through the stress relief device 5, the angle of the striking hammer 51 can be adjusted by the rotation of the planetary gear 529, so that the striking hammer 51 is in an avoidance state (e.g., Figure 7 As shown), this avoids affecting the lateral movement of the flange fixing mechanism 3 and the circumferential rotation and radial movement of the welding torch 47 of the welding mechanism 4;

[0071] During welding, the third lateral drive component 45 is activated, driving the welding gear ring 44 to move laterally via the welding bracket 41. The welding gear ring 44, through the welding radial drive component 46, drives the welding torch 47 to move laterally until the welding torch 47 moves above the contact point between the bellows 6 and the flange 7 or onto the radial path of the contact point between the bellows 6 and the flange 7 (e.g., ...). Figure 7 As shown), the welding radial drive 46 is activated, causing the welding torch 47 to approach the contact point between the bellows 6 and the flange 7 until a suitable welding distance is reached, at which point welding begins. The welding motor 42 is activated, driving the welding gear 43 to rotate. The welding gear 43 drives the welding gear ring 44 to rotate. The welding gear ring 44 drives the welding torch 47 to rotate circumferentially through the welding radial drive 46, thereby achieving circumferential welding at the contact point between the bellows 6 and the flange 7. After welding is completed, the welding torch 47 is removed.

[0072] When the stress is reduced by striking, the second lateral drive member 525 causes the striking hammer 51 to move laterally closer to the weld between the bellows 6 and the flange 7 (e.g., Figure 8 As shown), until the hammer 51 and the weld are in the same plane, the radial drive 26 activates to drive the hammer 51 to move radially closer to the weld, until the hammer 51 can contact the weld (as shown). Figure 9As shown), at this time, the motor 528 starts and drives the transmission gear 527 to rotate. The transmission gear 527 drives the gear ring 521 to drive, and the gear ring 521 drives the planetary gear 529 to rotate. Due to the constraints of the sun gear 522 and the connecting frame 524, the planetary gear 529 completes its own rotation while rotating around the sun gear 522. The planetary gear 529 thus drives the striking hammer 51 to rotate around the circumference and rotate on its own axis. When the striking hammer 51 rotates on its own axis, it strikes the weld joint. The circumferential rotation of the striking hammer 51 achieves circumferential striking around the weld joint.

[0073] During the tapping, after the tapping hammer 51 taps the weld, it retracts and approaches the radial drive member 526, allowing the tapping hammer 51 to pass over the weld for the next tap, thus preventing the tapping hammer 51 from getting stuck.

[0074] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A bellows welding device, characterized in that, It includes a frame (1) and a bellows fixing mechanism (2), a flange fixing mechanism (3) and a welding mechanism (4) mounted on the frame (1); The bellows fixing mechanism (2) is used to fix the bellows. The bellows fixing mechanism (2) includes a mounting base (21), an air pump (22), a heater (23), an air bag (24), and several fixing rods (25). The mounting base (21) is fixedly connected to the frame (1). The fixing rods (25) are slidably connected to the mounting base (21). The fixing rods (25) are distributed circumferentially around the mounting base (21). A ventilation channel (211) is opened in the center of the mounting base (21). The air bag (24) is fixedly connected to the mounting base (21), and the air bag (24) surrounds the right end port of the ventilation channel (211). 4) Power provided for the radial movement of the fixing rod (25) along the mounting base (21), the fixing rod (25) being used to abut against the inner wall of the bellows (6), the airbag (24) having a protrusion (241) matching the bellows (6), the protrusion (241) on the airbag (24) being able to fit the corrugated section on the bellows (6), the heater (23) being used to heat air, the output end of the air pump (22) being connected to the input end of the heater (23), the output end of the heater (23) being connected to the airbag (24), the air pump (22) being used to blow air into the airbag (24), causing the airbag (24) to inflate; The mounting base (21) has a radially extending groove (212), and the fixing rod (25) has a sliding seat (251) that matches the groove (212). The groove (212) and the sliding seat (251) correspond one-to-one, and the sliding seat (251) is slidably arranged in its corresponding groove (212). The bellows fixing mechanism (2) further includes a linkage component (26), which is used to connect the fixing rod (25) so that the fixing rod (25) moves radially synchronously. The linkage component (26) includes a sliding sleeve (261), a number of connecting rods (262) and a number of transmission rods (263). The connecting rods (262) and the slides (251) correspond one-to-one. The connecting rods (262) and their corresponding slides (251) are fixedly connected. A connecting part (213) is formed protruding on the left end face of the mounting base (21). The connecting part (213) surrounds the ventilation channel (211). The sliding sleeve (261) and the connecting part (213) are slidably connected. The transmission rods (263) and the connecting rods (262) correspond one-to-one. One end of the transmission rod (263) is rotatably connected to its corresponding connecting rod (262), and the other end is rotatably connected to the sliding sleeve (261). The flange fixing mechanism (3) is used to fix the flange; The welding mechanism (4) is used to weld the bellows and the flange, and the welding mechanism (4) is capable of surrounding the bellows.

2. The corrugated pipe welding device as described in claim 1, characterized in that: The flange fixing mechanism (3) includes a chuck (31) and a first transverse drive (32). The chuck (31) is used to clamp the flange, and the first transverse drive (32) is used to provide power for the flange on the chuck (31) to move closer to or away from the bellows. The first transverse drive (32) is fixedly connected to the frame (1), and the output end of the first transverse drive (32) is fixedly connected to the chuck (31).

3. The corrugated pipe welding device as described in claim 1, characterized in that: The welding apparatus also includes a stress relief device (5) arranged on the frame (1), the stress relief device (5) including a hammer (51) and a drive assembly (52), the hammer (51) being used to strike the weld joint of the bellows and the flange, and the drive assembly (52) being used to provide power for the circumferential rotation of the hammer (51) and for the hammer (51) to strike the weld joint of the bellows and the flange.

4. The corrugated pipe welding device as described in claim 3, characterized in that: The drive assembly (52) includes a gear ring (521), a sun gear (522), a mounting bracket (523), a connecting bracket (524), a second transverse drive member (525), a radial drive member (526), ​​a transmission gear (527), a motor (528), and planetary gears (529). The second lateral drive (525) is used to provide power for the lateral movement of the hammer (51). The second lateral drive (525) is fixedly connected to the frame (1). The output end of the second lateral drive (525) is fixedly connected to the mounting bracket (523). The mounting bracket (523) has a first through hole (5231) for the flange fixing mechanism (3) to pass through. The sun wheel (522) is fixedly connected to the mounting bracket (523). The sun wheel (522) has a second through hole (5221) for the flange fixing mechanism (3) to pass through. The gear ring (521) has teeth on both its inner and outer rings, and the gear ring (521) and the mounting bracket (523) are rotatably connected. The planetary gear (529) meshes with the sun gear (522), and the planetary gear (529) meshes with the inner ring of the gear ring (521). The planetary gear (529) is rotatably connected to the connecting frame (524), and the connecting frame (524) is rotatably connected to the mounting frame (523). The outer ring of the transmission gear (527) meshes with the outer ring of the gear ring (521), and the output shaft of the motor (528) is connected to the transmission gear (527) in a transmission connection. The radial drive (526) and the transmission gear (527) are fixedly connected, and the hammer (51) is arranged on the output end of the radial drive (526). The radial drive (526) is used to provide power for the radial movement of the hammer (51).

5. The corrugated pipe welding device as described in claim 4, characterized in that: The striking hammer (51) and the radial drive (526) are elastically connected, and a spring (53) is arranged between the output end of the striking hammer (51) and the radial drive (526).

6. The bellows welding apparatus as described in claim 4, characterized in that: The frame (1) has a sliding cavity (11) and the mounting bracket (523) has a slider (5232) that matches the sliding cavity (11). The slider (5232) and the sliding cavity (11) are slidably connected.

7. The bellows welding apparatus as described in claim 1, characterized in that: The airbag (24) has a one-way valve (242) and a pressure relief valve (243), the input end of the one-way valve (242) being connected to the output end of the heater (23).

8. The corrugated pipe welding device as described in claim 1, characterized in that: The welding mechanism (4) includes a welding bracket (41), a welding motor (42), a welding gear (43), a welding gear ring (44), a third transverse drive (45), a welding radial drive (46), and a welding torch (47). The welding bracket (41) and the frame (1) are slidably connected. The third transverse drive (45) and the frame (1) are fixedly connected. The output end of the third transverse drive (45) is fixedly connected to the welding bracket (41). The welding gear ring (44) and the welding bracket (41) are rotatably connected. The welding gear (43) and the welding gear ring (44) mesh. The output shaft of the welding motor (42) and the welding gear (43) are drivenly connected. The welding radial drive (46) and the welding gear ring (44) are fixedly connected. The output end of the welding radial drive (46) and the welding torch (47) are drivenly connected.

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