Low pressure pipe welding apparatus

Abstract

The present application relates to the technical fields of low-pressure pipeline welding, and discloses a low-pressure pipeline welding device, which comprises a moving seat, a support, a supporting ring frame, two supporting rods and two mounting hoops, the support is fixedly installed on the top surface of the moving seat, the supporting ring frame is fixedly installed on the top surface of the support, the two supporting rods are symmetrically fixedly installed on the two side surfaces of the support, the two mounting hoops are respectively arranged at the end portions of the two supporting rods, and the supporting ring frame is provided with a driving structure. After the welding is completed, the ball base impacts the surface of the butt weld in a rhythmic manner through the cooperation of the electric push rod and the servo motor, which not only effectively removes the oxide layer formed in the welding process, but also avoids the unevenness or omission possibly caused by manual cleaning. In addition, in combination with the continuous blowing function of the cooling nozzle, the oxide fragments knocked down can be effectively removed, the surface of the weld is kept clean, and a good foundation is laid for subsequent processing.

Description

Technical Field

[0001] This invention relates to the field of low-pressure pipeline welding technology, and in particular to a low-pressure pipeline welding apparatus. Background Technology

[0002] Low-voltage pipelines in power systems refer to tubular facilities used to carry and protect low-voltage power cables or conductors in power transmission and distribution systems. Their design, materials, and installation methods must meet specific electrical safety, mechanical protection, and environmental adaptability requirements. They can prevent cables from being damaged by mechanical means (such as squeezing or tooth-like damage), foreign objects from entering, and chemical corrosion, while providing insulation and isolation between cables and to ground, and suppressing electromagnetic interference.

[0003] A search revealed that Chinese Patent CN215034738U discloses a low-pressure pipeline welding device, including a main body and a welding assembly installed at the rear edge of the upper end face of the main body. A bearing body is installed near the front edge of the upper end face of the main body. A pipe-fixing ring is embedded inside the bearing body. A fixing post is fitted through the upper end face of the pipe-fixing ring, and an upper fixing ring is embedded at the lower end of the fixing post. A lower fixing ring is embedded in the inner bottom surface of the pipe-fixing ring. A fixing spring is wound around the outside of the fixing post, located between the pipe-fixing ring and the upper fixing ring. A fixing block extends from the outside of the bearing body, and a limiting post is elastically installed through the side of the fixing block. A clamping ring is embedded at the end of the limiting post. This design can improve welding efficiency and welding quality. However, in practical use, this solution still has the following shortcomings:

[0004] In metal welding operations on low-voltage pipelines in power systems, oxides are prone to form in the weld area. Existing treatment processes rely on manual grinding (using 80-120 grit sandpaper) or chemical pickling (hydrochloric acid + corrosion inhibitor), which not only increases labor costs but also poses risks such as uneven surface treatment and acid residue corrosion of the pipeline body. Furthermore, zinc oxide fumes pose occupational health risks to workers when operating in confined spaces.

[0005] Therefore, a low-pressure pipeline welding device needs to be designed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a low-pressure pipeline welding device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A low-pressure pipeline welding apparatus includes a welding unit and a processing unit;

[0009] The welding unit includes a movable seat, a bracket, a support ring frame, two support rods, and two mounting rings. The bracket is fixedly installed on the top surface of the movable seat, the support ring frame is fixedly installed on the top surface of the bracket, the two support rods are symmetrically fixedly installed on the two sides of the bracket, and the two mounting rings are respectively located at the ends of the two support rods. A driving structure is provided on the support ring frame, and a mounting arm is provided on the driving structure. A welding seat is provided at the end of the mounting arm, and a cooling component corresponding to the welding seat is provided on the side of the mounting arm.

[0010] The processing unit includes a support ring and a support rod. The support ring is fixedly mounted on the drive structure by a fixing rod, and the support rod is slidably mounted on the inner wall of the support ring. A grinding structure is provided at the top end of the support rod.

[0011] As a preferred embodiment of the present invention, the driving structure includes a welded gear ring, three fixed brackets, an annular groove, a clearance opening, a servo motor, and a drive gear. The welded gear ring is disposed on the inner side of the support ring frame, and the mounting arm is fixedly connected to the inner wall of the welded gear ring. The three fixed brackets are arranged in a circular array and fixedly installed on the inner wall of the support ring frame. The annular groove is opened on the side of the welded gear ring, and the end of the fixed bracket is slidably connected to the inner wall of the annular groove. The clearance opening is opened on the outer wall of the support ring frame, the servo motor is fixedly installed on the outer wall of the support ring frame, and the drive gear is fixedly installed on the output end of the servo motor. The drive gear passes through the clearance opening and meshes with the welded gear ring.

[0012] As a preferred embodiment of the present invention, the cooling assembly includes a fixed cylinder, an elastic airbag, an air intake pipe, an air outlet pipe, a cooling nozzle, a transmission block, two guide blocks, and two guide grooves. The fixed cylinder is fixedly installed on the side of the mounting arm, the elastic airbag is fixedly installed on the inner bottom surface of the fixed cylinder, the air intake pipe is disposed through one side of the bottom surface of the elastic airbag, and the air outlet pipe is disposed through the other side of the bottom surface of the elastic airbag. The bottom ends of the air intake pipe and the air outlet pipe both pass through the bottom surface of the fixed cylinder, and the cooling nozzle is disposed at the bottom end of the air outlet pipe. The transmission block is disposed on the inner side of the fixed cylinder, and the top surface of the elastic airbag is fixedly connected to the bottom surface of the transmission block. The two guide blocks are symmetrically fixedly installed on the outer wall of the transmission block, and the two guide grooves are symmetrically opened on the inner wall of the fixed cylinder. The guide blocks and the guide grooves are slidably connected, and a linkage mechanism is provided on the fixed cylinder.

[0013] As a preferred embodiment of the present invention, the linkage mechanism includes a shaft, a drive block, a transmission gear, and a plurality of fixed teeth. The shaft passes through the top surface of the fixed cylinder. The drive block is fixedly installed at one end of the shaft located inside the fixed cylinder. The transmission gear is fixedly installed at the top of the shaft. The plurality of fixed teeth are arranged in a ring array and fixedly installed on the inner wall of the support ring frame, and the transmission gear meshes with the fixed teeth.

[0014] As a preferred embodiment of the present invention, the opposite ends of the driving block and the transmission block are both configured as corresponding inclined surfaces, and the cooling nozzle is inclined.

[0015] As a preferred embodiment of the present invention, one-way valves with opposite flow directions are fixedly installed on the inner walls of the intake pipe and the outlet pipe.

[0016] As a preferred embodiment of the present invention, the processing unit further includes a support spring, an electric push rod, a linkage gear, and several protrusions. The support spring is fitted onto the outer wall of the support rod, and both ends of the support spring are fixedly connected to the support rod and the support ring, respectively. The electric push rod is rotatably mounted on the bottom end of the support rod. The linkage gear is fixedly mounted on the telescopic end of the electric push rod. Several protrusions are arranged in a ring array and fixedly mounted on the inner wall of the support ring frame.

[0017] As a preferred embodiment of the present invention, the grinding structure includes a connecting rod, three mounting brackets, three rotating shafts, three grippers, three torsion springs, three ball bases, sandpaper, and three push plates. The connecting rod is rotatably mounted on the top of the support rod. The three mounting brackets are arranged in a circular array and fixedly mounted on the outer wall of the top of the connecting rod. The three rotating shafts are rotatably mounted on the inner walls of the three mounting brackets. The three grippers are fixedly fitted onto the outer walls of the three rotating shafts. The three torsion springs are fitted onto the ends of the three rotating shafts, and the two ends of the torsion springs are fixedly connected to the mounting brackets and rotating shafts, respectively. The three ball bases are fixedly mounted on the tops of the three grippers. The sandpaper is disposed between the three ball bases. The three push plates are fixedly mounted on the bottom ends of the three grippers.

[0018] As a preferred embodiment of the present invention, a slip ring is slidably fitted on the outer wall of the connecting rod, and an electric push rod II is fixedly installed on the outer wall of the connecting rod. The telescopic end of the electric push rod II is fixedly connected to the bottom surface of the slip ring. A drive shaft is provided through the bottom end of the support rod. The bottom end of the drive shaft is fixedly connected to the electric push rod I. The top end of the drive shaft is connected to the connecting rod via a driven wheel and a synchronous belt. A fixing ring corresponding to the fixing teeth is fixedly installed on the inner wall of the support ring frame, and an opening corresponding to the linkage gear is provided on the fixing ring.

[0019] As a preferred embodiment of the present invention, all three ball bases are one-third spheres, and the push plate and the gripper are arranged perpendicularly.

[0020] The present invention has the following beneficial effects:

[0021] 1. By setting up an installation arm and cooling components, during the welding process, the drive gear meshes with the fixed teeth on the inner wall of the support ring frame, driving the transmission gear and shaft to rotate, which in turn drives the elastic airbag to reciprocate and compress. This design can draw in air and spray it to the welding position in real time, ensuring that the weld can be cooled immediately after welding. This helps to reduce the size of the heat-affected zone, reduce the risk of welding deformation, and improve the quality of the weld.

[0022] 2. By setting up a processing unit, after welding is completed, the ball base rhythmically impacts the weld surface through the coordinated action of the electric push rod and the servo motor. This process not only effectively removes the oxide layer formed during welding, but also avoids the unevenness or omissions that may be caused by manual cleaning. In addition, combined with the continuous blowing function of the cooling nozzle, it can effectively remove the oxide fragments that are knocked off, keep the weld surface clean, and lay a good foundation for subsequent processing.

[0023] 3. By setting up a grinding structure, after the oxide is removed, the clamping state is adjusted by an electric push rod to separate the ball base and unfold the internal sandpaper. As the welding gear ring rotates again, the meshing of the linkage gear and the fixed teeth drives the entire device to rotate, thereby achieving comprehensive and meticulous grinding of the weld surface. This not only removes residual minor imperfections and smooths the weld surface, but also significantly improves the overall aesthetics and mechanical properties of the weld, and enhances its corrosion resistance and structural strength. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a low-pressure pipeline welding device proposed in this invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of a low-pressure pipeline welding device proposed in this invention. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the support ring frame structure of a low-pressure pipeline welding device proposed in this invention. Figure 1 ;

[0027] Figure 4 This is a schematic diagram of the support ring frame structure of a low-pressure pipeline welding device proposed in this invention. Figure 2 ;

[0028] Figure 5 This is an exploded view of the fixed cylinder structure of a low-pressure pipeline welding device proposed in this invention;

[0029] Figure 6 for Figure 4 Enlarged structural diagram at point A in the middle;

[0030] Figure 7This is a schematic diagram of the support rod and connecting rod structure of a low-pressure pipeline welding device proposed in this invention;

[0031] Figure 8 for Figure 7 Enlarged structural diagram at point B;

[0032] Figure 9 for Figure 3 Enlarged structural diagram at point C.

[0033] In the diagram: 11. Movable seat; 12. Bracket; 13. Support ring frame; 14. Support rod; 15. Mounting hoop; 21. Welded gear ring; 22. Fixing frame; 23. Annular groove; 24. Clearance opening; 25. Servo motor; 26. Drive gear; 31. Mounting arm; 32. Welded seat; 41. Fixing cylinder; 42. Elastic airbag; 43. Intake pipe; 44. Exhaust pipe; 45. Cooling nozzle; 46. Transmission block; 47. Guide block; 48. Guide groove; 5 1. Shaft; 52. Drive block; 53. Transmission gear; 54. Fixed teeth; 61. Support ring; 62. Support rod; 63. Support spring; 64. Electric push rod one; 65. Linkage gear; 66. Protrusion; 71. Connecting rod; 72. Mounting bracket; 73. Rotating shaft; 74. Clamp; 75. Torsion spring; 76. Ball base; 77. Sandpaper; 78. Push plate; 79. Slip ring; 710. Electric push rod two; 711. Transmission shaft; 712. Fixed ring. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Reference Figure 1-9 A low-pressure pipeline welding device, comprising a welding unit and a processing unit;

[0036] The welding unit includes a movable seat 11, a bracket 12, a support ring frame 13, two support rods 14 and two mounting rings 15. The bracket 12 is fixedly installed on the top surface of the movable seat 11, the support ring frame 13 is fixedly installed on the top surface of the bracket 12, the two support rods 14 are symmetrically fixedly installed on the two sides of the bracket 12, and the two mounting rings 15 are respectively set at the ends of the two support rods 14. A driving structure is provided on the support ring frame 13, and a mounting arm 31 is provided on the driving structure. A welding seat 32 is provided at the end of the mounting arm 31, and a cooling component corresponding to the welding seat 32 is provided on the side of the mounting arm 31.

[0037] Workers can first place the low-voltage power system pipes to be welded into the two mounting rings 15 on both sides, and fix the low-voltage power system pipes with the mounting rings 15, so that the welding joint of the two low-voltage power system pipes is located in the support ring frame 13.

[0038] The drive structure includes a welded gear ring 21, three fixed brackets 22, an annular groove 23, a clearance opening 24, a servo motor 25, and a drive gear 26. The welded gear ring 21 is located inside the support ring frame 13. The mounting arm 31 is fixedly connected to the inner wall of the welded gear ring 21. The three fixed brackets 22 are arranged in a ring array and fixedly installed on the inner wall of the support ring frame 13. The annular groove 23 is opened on the side of the welded gear ring 21, and the ends of the fixed brackets 22 are slidably connected to the inner wall of the annular groove 23. The clearance opening 24 is opened on the outer wall of the support ring frame 13. The servo motor 25 is fixedly installed on the outer wall of the support ring frame 13. The drive gear 26 is fixedly installed on the output end of the servo motor 25, and the drive gear 26 passes through the clearance opening 24 and meshes with the welded gear ring 21.

[0039] The operator can start the servo motor 25 to drive the drive gear 26 to rotate forward. The drive gear 26 meshes with the welding gear ring 21, which in turn drives the welding gear ring 21 to rotate inside the support ring frame 13 through the fixed frame 22 and the annular groove 23. At the same time, the welding seat 32 can be started. Driven by the welding gear ring 21, the mounting arm 31 and the welding seat 32 can rotate synchronously to weld the connection of the two low-pressure pipes. When the welding gear ring 21 has rotated 360 degrees, the welding work is completed.

[0040] The cooling assembly includes a fixed cylinder 41, an elastic airbag 42, an intake pipe 43, an exhaust pipe 44, a cooling nozzle 45, a transmission block 46, two guide blocks 47, and two guide grooves 48. The fixed cylinder 41 is fixedly installed on the side of the mounting arm 31, and the elastic airbag 42 is fixedly installed on the inner bottom surface of the fixed cylinder 41. The intake pipe 43 passes through one side of the bottom surface of the elastic airbag 42, and the exhaust pipe 44 passes through the other side of the bottom surface of the elastic airbag 42. The inner walls of the intake pipe 43 and the exhaust pipe 44 are fixedly fitted with unidirectional pipes with opposite flow directions. The bottom ends of the valve, the suction pipe 43 and the discharge pipe 44 all pass through the bottom surface of the fixed cylinder 41, and the cooling nozzle 45 is set at the bottom end of the discharge pipe 44. The cooling nozzle 45 is set at an angle. The transmission block 46 is set inside the fixed cylinder 41, and the top surface of the elastic air bag 42 is fixedly connected to the bottom surface of the transmission block 46. Two guide blocks 47 are symmetrically fixedly installed on the outer wall of the transmission block 46. Two guide grooves 48 are symmetrically opened on the inner wall of the fixed cylinder 41, and the guide blocks 47 and the guide grooves 48 are slidably connected. The fixed cylinder 41 is provided with a linkage mechanism.

[0041] The linkage mechanism includes a shaft 51, a drive block 52, a transmission gear 53, and several fixed teeth 54. The shaft 51 is installed through the top surface of the fixed cylinder 41. The drive block 52 is fixedly installed at one end of the shaft 51 located inside the fixed cylinder 41. The ends of the drive block 52 and the transmission block 46 are both set as corresponding inclined surfaces. The transmission gear 53 is fixedly installed at the top of the shaft 51. Several fixed teeth 54 are arranged in a ring array and fixedly installed on the inner wall of the support ring frame 13, and the transmission gear 53 meshes with the fixed teeth 54.

[0042] During the welding process, as the mounting arm 31 rotates with the welding gear ring 21, the fixing cylinder 41 on its side can rotate synchronously. When the fixing cylinder 41 rotates, the transmission gear 53 at the end of the shaft 51 on it meshes with the fixing teeth 54 on the inner wall of the support ring frame 13, thereby driving the transmission gear 53 and the shaft 51 to rotate. When the shaft 51 rotates, it can drive the drive block 52 to rotate. The transmission block 46 is slidably connected to the inner wall of the fixing cylinder 41 through the guide groove 48 and the guide block 47. The ends of the drive block 52 and the transmission block 46 are set as corresponding inclined surfaces. Therefore, when the drive block 52 rotates, it can rotate on the inclined surface and the spring. The elasticity of the elastic airbag 42 drives the transmission block 46 to slide back and forth, thereby compressing the elastic airbag 42 back and forth. Since one-way valves with opposite flow directions are installed in the air intake pipe 43 and the air outlet pipe 44, when the elastic airbag 42 is stretched, air can be drawn into the elastic airbag 42 through the air intake pipe 43. When the elastic airbag 42 is compressed, the gas inside it can be ejected through the air outlet pipe 44 and the cooling nozzle 45, thereby cooling the welding position. The cooling nozzle 45 is installed behind the welding seat 32 in the direction of rotation, so it can be cooled after welding, ensuring the cooling effect of the weld.

[0043] The processing unit includes a support ring 61 and a support rod 62. The support ring 61 is fixedly mounted on the drive structure by a fixing rod, and the support rod 62 is slidably mounted on the inner wall of the support ring 61. A grinding structure is provided at the top of the support rod 62.

[0044] The processing unit also includes a support spring 63, an electric push rod 64, a linkage gear 65, and several protrusions 66. The support spring 63 is fitted on the outer wall of the support rod 62, and the two ends of the support spring 63 are fixedly connected to the support rod 62 and the support ring 61, respectively. The electric push rod 64 is rotatably mounted on the bottom end of the support rod 62. The linkage gear 65 is fixedly mounted on the telescopic end of the electric push rod 64. Several protrusions 66 are arranged in a ring array and fixedly mounted on the inner wall of the support ring frame 13.

[0045] Extend the electric push rod 64 so that the linkage gear 65 at the telescopic end of the electric push rod 64 can contact the inner wall of the support ring frame 13. This will activate the servo motor 25 to reverse, driving the welding gear ring 21 to reverse as well. When the welding gear ring 21 rotates, it can drive the support rod 62 to rotate through the fixed rod and the support ring 61. When the support rod 62 rotates, due to the setting of the protrusion 66, the linkage gear 65 can slide along the protrusion 66 when it contacts the protrusion 66 during the rotation of the welding gear ring 21. This allows the support rod 62 to slide along the support ring 61. At this time, the grinding structure at the end can move towards the low-pressure pipe and impact the weld of the low-pressure pipe. When the linkage gear 65 separates from the protrusion 66, the support rod 62 can slide in the opposite direction along the support ring 61 under the action of the support spring 63 to reset. After the welding gear ring 21 rotates one revolution, the excess oxide on the surface of the weld can be knocked off through the above steps. At the same time, the oxide knocked off can be blown off the weld by the spray of the cooling nozzle 45.

[0046] The sanding structure includes a connecting rod 71, three mounting brackets 72, three rotating shafts 73, three grippers 74, three torsion springs 75, three ball bases 76, sandpaper 77, and three push plates 78. The connecting rod 71 is rotatably mounted on the top of the support rod 62. The three mounting brackets 72 are arranged in a circular array and fixedly mounted on the outer wall of the top of the connecting rod 71. The three rotating shafts 73 are rotatably mounted on the inner walls of the three mounting brackets 72. The three grippers 74 are fixedly fitted onto the outer walls of the three rotating shafts 73. The three torsion springs 75 are fitted onto the ends of the three rotating shafts 73, and both ends of the torsion springs 75 are fixedly connected to the mounting brackets 72 and the rotating shafts 73, respectively. The three ball bases 76 are fixedly mounted on the tops of the three grippers 74, and each ball base 76 is one-third the size of a sphere. The plate 77 is set between the three ball bases 76. The three push plates 78 are respectively fixedly installed at the bottom of the three grippers 74. The push plates 78 and the grippers 74 are set perpendicularly. The outer wall of the connecting rod 71 is slidably fitted with a slip ring 79. The outer wall of the connecting rod 71 is fixedly installed with an electric push rod 710. The telescopic end of the electric push rod 710 is fixedly connected to the bottom surface of the slip ring 79. The bottom end of the support rod 62 is provided with a drive shaft 711. The bottom end of the drive shaft 711 is fixedly connected to the electric push rod 64. The top end of the drive shaft 711 is connected to the connecting rod 71 through a driven wheel and a synchronous belt. The inner wall of the support ring frame 13 is fixedly installed with a fixed ring 712 corresponding to the fixed teeth 54. The fixed ring 712 has an opening corresponding to the linkage gear 65.

[0047] When the oxide layer on the weld surface is tapped, the extension of the electric push rod 710 causes the slip ring 79 to slide upward, thereby pushing the push plate 78. This allows the gripper 74 to rotate via the rotating shaft 73, and the three ball bases 76 to rotate in a converging direction, so that the three ball bases 76 contact each other and form a complete sphere. The sandpaper 77 between the three ball bases 76 can be stored inside the ball bases 76 without affecting their surface. After the oxide is tapped, the operator can shorten the electric push rod 64, causing the linkage gear 65 at its extension end to move through the opening on the fixed ring 712 and mesh with the fixed teeth 54. The linkage gear 65 can be located inside the fixed ring 712. Then, the electric push rod 710 is shortened again, causing the slip ring 79 to slide downward. After the slip ring 79 slides downward, under the action of the torsion spring 75... The gripper 74 can be reversed, causing the three ball bases 76 to separate. During the separation of the three ball bases 76, the inner sandpaper 77 can be unfolded, which can turn on the servo motor 25 to reverse and drive the welding gear ring 21 to rotate again. As the welding gear ring 21 rotates, the linkage gear 65 and the opening are misaligned, and the electric push rod 64 can be extended. At this time, the linkage gear 65 abuts against the inner wall of the fixed ring 712. Therefore, when the electric push rod 64 is extended, it can drive the support rod 62 to slide along the support ring 61, so that the sandpaper 77 on the inner side of the ball base 76 fits with the weld. As the welding gear ring 21 rotates, the linkage gear 65 meshes with the fixed teeth 54, which can drive the linkage gear 65 and the electric push rod 64 to rotate. Through the transmission shaft 711, driven wheel, and synchronous belt, the connecting rod 71 is driven to rotate, so that the sandpaper 77 rotates to perform the sanding operation on the weld.

[0048] The specific working principle of this invention is as follows:

[0049] In use, the operator first places the low-voltage power system pipes to be welded into the two mounting rings 15 on both sides and fixes the low-voltage power system pipes with the mounting rings 15, so that the welding joint of the two low-voltage power system pipes is located in the support ring frame 13. Then, the operator can start the servo motor 25 to drive the drive gear 26 to rotate forward. The drive gear 26 meshes with the welding gear ring 21, which in turn drives the welding gear ring 21 to rotate inside the support ring frame 13 through the fixing frame 22 and the annular groove 23. At the same time, the welding seat 32 can be started. Under the drive of the welding gear ring 21, the mounting arm 31 and the welding seat 32 can rotate synchronously to weld the connection of the two low-voltage pipes. When the welding gear ring 21 has rotated 360 degrees, the welding work is completed. The working principle and connection method of the mounting arm 31 and the welding seat 32 are existing mature technologies, which will not be described in detail here.

[0050] During the welding process, as the mounting arm 31 rotates with the welding gear ring 21, the fixing cylinder 41 on its side can rotate synchronously. When the fixing cylinder 41 rotates, the transmission gear 53 at the end of the shaft 51 on it meshes with the fixing teeth 54 on the inner wall of the support ring frame 13, thereby driving the transmission gear 53 and the shaft 51 to rotate. When the shaft 51 rotates, it can drive the drive block 52 to rotate. The transmission block 46 is slidably connected to the inner wall of the fixing cylinder 41 through the guide groove 48 and the guide block 47. The ends of the drive block 52 and the transmission block 46 are set as corresponding inclined surfaces. Therefore, when the drive block 52 rotates, it can rotate on the inclined surface and the spring. The elasticity of the elastic airbag 42 drives the transmission block 46 to slide back and forth, thereby compressing the elastic airbag 42 back and forth. Since one-way valves with opposite flow directions are installed in the air intake pipe 43 and the air outlet pipe 44, when the elastic airbag 42 is stretched, air can be drawn into the elastic airbag 42 through the air intake pipe 43. When the elastic airbag 42 is compressed, the gas inside it can be ejected through the air outlet pipe 44 and the cooling nozzle 45, thereby cooling the welding position. The cooling nozzle 45 is installed behind the welding seat 32 in the direction of rotation, so it can be cooled after welding, ensuring the cooling effect of the weld.

[0051] When the electric push rod 710 extends, it can drive the slip ring 79 to slide upward, thereby pushing the push plate 78. This allows the gripper 74 to rotate via the rotating shaft 73, and the three ball bases 76 can rotate in a direction that brings them together, so that the three ball bases 76 contact each other and form a complete sphere. The sandpaper 77 between the three ball bases 76 can be stored inside the ball bases 76 without affecting their appearance. After the ball bases 76 are gathered, the electric push rod 64 can be extended again, so that the linkage gear 65 at the extension end of the electric push rod 64 can contact the inner wall of the support ring frame 13. This activates the servo motor 25 to reverse, driving the welding gear ring 21 to reverse as well. When the welding gear ring 21 rotates, it can be driven by the fixed rod, The support ring 61 drives the support rod 62 to rotate. When the support rod 62 rotates, due to the setting of the convex 66, when the linkage gear 65 contacts the convex 66 during the rotation of the welding gear ring 21, it can slide along the convex 66, so that the support rod 62 slides along the support ring 61. At this time, the ball base 76 at the end can move towards the low-pressure pipeline and impact the weld position of the low-pressure pipeline. When the linkage gear 65 separates from the convex 66, under the action of the support spring 63, the support rod 62 can slide in the opposite direction along the support ring 61 so as to reset and impact again. After the welding gear ring 21 rotates once, the excess oxide on the surface of the weld can be knocked off by the knocking of the ball base 76. At the same time, the oxide knocked off can be blown off the weld by the spray of the cooling nozzle 45.

[0052] After the oxide hammering is completed, the operator can shorten the electric push rod 64, causing the linkage gear 65 at its telescopic end to move through the opening on the fixed ring 712 and mesh with the fixed teeth 54. The linkage gear 65 can be located inside the fixed ring 712. Then, the electric push rod 710 is shortened, causing the slip ring 79 to slide downwards. After the slip ring 79 slides downwards, the gripper 74 can reverse under the action of the torsion spring 75, causing the three ball bases 76 to separate. During the separation of the three ball bases 76, the sandpaper 77 on their inner side can unfold, which can then turn on the servo motor 25 to reverse and drive the welding gear ring 21 to rotate again. As the welding gear ring 21 rotates, the linkage gear 65 is misaligned with the opening, and the electric push rod 64 can extend. At this time, the linkage gear 65... The electric push rod 64 extends and abuts against the inner wall of the fixed ring 712, thus driving the support rod 62 to slide along the support ring 61 when the electric push rod 64 extends. This causes the sandpaper 77 on the inner side of the ball base 76 to fit against the weld. As the welding gear ring 21 rotates, the linkage gear 65 meshes with the fixed teeth 54, which in turn drives the linkage gear 65 and the electric push rod 64 to rotate. Through the transmission shaft 711, the driven wheel, and the synchronous belt, the connecting rod 71 is driven to rotate, causing the sandpaper 77 to rotate and perform a grinding operation on the weld. After the welding gear ring 21 has rotated 360 degrees, the linkage gear 65 is located at the opening. Under the action of the support spring 63, the support rod 62 can be reset, causing the linkage gear 65 to move downward and separate from the fixed teeth 54. The worker can then remove the welded low-voltage power system pipeline from the device.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A low-pressure pipeline welding device, characterized in that, Includes welding and processing units; The welding unit includes a movable seat (11), a bracket (12), a support ring frame (13), two support rods (14) and two mounting rings (15). The bracket (12) is fixedly installed on the top surface of the movable seat (11), the support ring frame (13) is fixedly installed on the top surface of the bracket (12), the two support rods (14) are symmetrically fixedly installed on the two sides of the bracket (12), and the two mounting rings (15) are respectively set at the ends of the two support rods (14). The support ring frame (13) is provided with a driving structure, the driving structure is provided with a mounting arm (31), the end of the mounting arm (31) is provided with a welding seat (32), and the side of the mounting arm (31) is provided with a cooling component corresponding to the welding seat (32). The processing unit includes a support ring (61) and a support rod (62). The support ring (61) is fixedly installed on the drive structure by a fixing rod. The support rod (62) is slidably installed on the inner wall of the support ring (61). A grinding structure is provided at the top of the support rod (62). The cooling assembly includes a fixed cylinder (41), an elastic airbag (42), an air intake pipe (43), an air outlet pipe (44), a cooling nozzle (45), a transmission block (46), two guide blocks (47), and two guide grooves (48). The fixed cylinder (41) is fixedly installed on the side of the mounting arm (31), and the elastic airbag (42) is fixedly installed on the inner bottom surface of the fixed cylinder (41). The air intake pipe (43) passes through one side of the bottom surface of the elastic airbag (42), and the air outlet pipe (44) passes through the other side of the bottom surface of the elastic airbag (42). The air intake pipe (43) and the air outlet pipe (44) pass through the other side of the bottom surface of the elastic airbag (42). The bottom ends of the air pipes (44) all pass through the bottom surface of the fixed cylinder (41), and the cooling nozzles (45) are located at the bottom end of the air outlet pipes (44). The transmission block (46) is located inside the fixed cylinder (41), and the top surface of the elastic airbag (42) is fixedly connected to the bottom surface of the transmission block (46). The two guide blocks (47) are symmetrically fixedly installed on the outer wall of the transmission block (46), and the two guide grooves (48) are symmetrically opened on the inner wall of the fixed cylinder (41). The guide blocks (47) and the guide grooves (48) are slidably connected. The fixed cylinder (41) is provided with a linkage mechanism. The processing unit also includes a support spring (63), an electric push rod (64), a linkage gear (65), and several protrusions (66). The support spring (63) is fitted on the outer wall of the support rod (62), and the two ends of the support spring (63) are fixedly connected to the support rod (62) and the support ring (61) respectively. The electric push rod (64) is rotatably installed at the bottom end of the support rod (62). The linkage gear (65) is fixedly installed at the telescopic end of the electric push rod (64). Several protrusions (66) are arranged in a ring array and fixedly installed on the inner wall of the support ring frame (13).

2. The low-pressure pipeline welding device according to claim 1, characterized in that, The drive structure includes a welded gear ring (21), three fixed brackets (22), an annular groove (23), a clearance opening (24), a servo motor (25), and a drive gear (26). The welded gear ring (21) is located on the inner side of the support ring frame (13). The mounting arm (31) is fixedly connected to the inner wall of the welded gear ring (21). The three fixed brackets (22) are arranged in an annular array and fixedly installed on the inner wall of the support ring frame (13). The annular groove (23) is opened on the side of the welded gear ring (21), and the end of the fixed bracket (22) is slidably connected to the inner wall of the annular groove (23). The clearance opening (24) is opened on the outer wall of the support ring frame (13). The servo motor (25) is fixedly installed on the outer wall of the support ring frame (13). The drive gear (26) is fixedly installed on the output end of the servo motor (25), and the drive gear (26) passes through the clearance opening (24) and meshes with the welded gear ring (21).

3. The low-pressure pipeline welding device according to claim 2, characterized in that, The linkage mechanism includes a shaft (51), a drive block (52), a transmission gear (53), and several fixed teeth (54). The shaft (51) is disposed through the top surface of the fixed cylinder (41). The drive block (52) is fixedly installed at one end of the shaft (51) located inside the fixed cylinder (41). The transmission gear (53) is fixedly installed at the top of the shaft (51). Several fixed teeth (54) are arranged in a ring array and fixedly installed on the inner wall of the support ring frame (13). The transmission gear (53) meshes with the fixed teeth (54).

4. The low-pressure pipeline welding device according to claim 3, characterized in that, The drive block (52) and the transmission block (46) are both set with corresponding inclined surfaces at their opposite ends, and the cooling nozzle (45) is set at an angle.

5. A low-pressure pipeline welding device according to claim 4, characterized in that, One-way valves with opposite flow directions are fixedly installed on the inner walls of the intake pipe (43) and the outlet pipe (44).

6. A low-pressure pipeline welding device according to claim 5, characterized in that, The grinding structure includes a connecting rod (71), three mounting brackets (72), three rotating shafts (73), three grippers (74), three torsion springs (75), three ball bases (76), sandpaper discs (77), and three push plates (78). The connecting rod (71) is rotatably mounted on the top of the support rod (62). The three mounting brackets (72) are arranged in a circular array and fixedly mounted on the outer wall of the top of the connecting rod (71). The three rotating shafts (73) are respectively rotatably mounted on the inner wall of the three mounting brackets (72). The grippers (74) are fixedly mounted on the outer walls of the three rotating shafts (73), the three torsion springs (75) are respectively mounted on the ends of the three rotating shafts (73), and the two ends of the torsion springs (75) are respectively fixedly connected to the mounting bracket (72) and the rotating shaft (73), the three ball bases (76) are respectively fixedly mounted on the top of the three grippers (74), the sandpaper (77) is set between the three ball bases (76), and the three push plates (78) are respectively fixedly mounted on the bottom of the three grippers (74).

7. A low-pressure pipeline welding device according to claim 6, characterized in that, The outer wall of the connecting rod (71) is fitted with a sliding ring (79), and the outer wall of the connecting rod (71) is fixedly installed with an electric push rod two (710). The telescopic end of the electric push rod two (710) is fixedly connected to the bottom surface of the sliding ring (79). The bottom end of the support rod (62) is provided with a drive shaft (711). The bottom end of the drive shaft (711) is fixedly connected to the electric push rod one (64). The top end of the drive shaft (711) is connected to the connecting rod (71) through a driven wheel and a synchronous belt. The inner wall of the support ring frame (13) is fixedly installed with a fixed ring (712) corresponding to the fixed teeth (54). The fixed ring (712) has an opening corresponding to the linkage gear (65).

8. A low-pressure pipeline welding device according to claim 7, characterized in that, All three ball bases (76) are one-third spheres, and the push plate (78) and the gripper (74) are arranged perpendicularly.

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