Low-pressure pipeline welding device

Abstract

The invention relates to the technical field 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 hoop rings, the support is fixedly mounted on the top face of the moving seat, and the supporting ring frame is fixedly mounted on the top face of the support; the two supporting rods are symmetrically and fixedly installed on the two side faces of the support, the two installation hoop rings are arranged at the ends of the two supporting rods respectively, and a driving structure is arranged on the supporting ring frame. After welding is completed, through the synergistic effect of an electric push rod and a servo motor, a ball base conducts rhythmic impact on the surface of a weld joint, in the process, an oxide layer formed in the welding process is effectively removed, and non-uniformity or omission possibly caused by manual cleaning is avoided; and in combination with a continuous blowing function of the cooling nozzle, oxide fragments which are knocked down can be effectively removed, the surface of a welding seam is kept clean, and a good foundation is laid for subsequent treatment.

Description

Technical Field

[0001] The invention relates to the technical field of low-pressure pipeline welding, and in particular to a low-pressure pipeline welding device. Background Art

[0002] The low-voltage pipeline of the power system refers to the tubular facility used to carry and protect low-voltage power cables or conductors in the power transmission and distribution system. Its design, materials and installation methods must meet specific electrical safety, mechanical protection and environmental adaptability requirements. It can prevent the cable from mechanical damage (such as extrusion, rodent damage), foreign object intrusion and chemical corrosion, while providing insulation isolation between cables and to the ground to suppress electromagnetic interference.

[0003] After searching, the Chinese patent with announcement number CN215034738U discloses a low-pressure pipeline welding device, including a device body and a welding assembly installed at the rear edge of the upper end face of the device body, a bearing body is installed near the front edge of the upper end face of the device body, a pipe fixing ring is inlaid inside the bearing body, a fixing column is installed through the upper end face of the pipe fixing ring, an upper fixing ring is inlaid at the lower end of the fixing column, a lower fixing ring is inlaid on the inner bottom face of the pipe fixing ring, a fixing spring is wound around the outer side of the fixing column, and the fixing spring is located between the pipe fixing ring and the upper fixing ring, a fixing block extends outside the bearing body, a limiting column is elastically installed through the side face of the fixing block, and a clamping ring is inlaid at the end of the limiting column, which can improve welding efficiency and welding quality. However, this solution still has the following shortcomings when it is actually used: In the metal welding operation of low-pressure pipelines in the power system, oxides are prone to appear in the weld area, and the existing treatment process relies on manual grinding (using 80-120 mesh sandpaper) or chemical pickling (hydrochloric acid + corrosion inhibitor), which not only increases the man-hour cost, but also has hidden dangers such as uneven surface treatment and acid residue corroding the pipeline body. In addition, when working in a confined space, zinc oxide fumes also pose an occupational health risk to operators.

[0004] Therefore, it is necessary to design a low-pressure pipeline welding device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a low-pressure pipeline welding device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A low-pressure pipeline welding device comprises a welding unit and a processing unit; The welding unit comprises a movable seat, a bracket, a support ring frame, two support rods and two mounting hoops, the bracket is fixedly mounted on the top surface of the movable seat, the support ring frame is fixedly mounted on the top surface of the bracket, the two support rods are symmetrically fixedly mounted on the two side surfaces of the bracket, the two mounting hoops are respectively arranged at the ends of the two support rods, the support ring frame is provided with a driving structure, the driving structure is provided with a mounting arm, the end of the mounting arm is provided with a welding seat, and the side of the mounting arm is provided with a cooling assembly corresponding to the welding seat; The processing unit comprises a support ring and a support rod. The support ring is fixedly mounted on the driving structure through a fixing rod. The support rod is slidably mounted on the inner wall of the support ring. A grinding structure is arranged on the top of the support rod.

[0007] As a preferred technical solution of the present invention, the driving structure includes a welding gear ring, three fixing frames, an annular groove, a clearance port, a servo motor and a driving gear, the welding gear ring is arranged on the inner side of the support ring frame, the mounting arm is fixedly connected to the inner wall of the welding gear ring, the three fixing frames are distributed in an annular array and fixedly installed on the inner wall of the support ring frame, the annular groove is opened on the side of the welding gear ring, and the end of the fixing frame is slidably connected to the inner wall of the annular groove, the clearance port 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, the driving gear is fixedly installed on the output end of the servo motor, and the driving gear passes through the clearance port to mesh with the welding gear ring.

[0008] As a preferred technical solution of the present invention, the cooling assembly includes a fixed cylinder, an elastic airbag, an intake pipe, an exhaust 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 intake pipe is penetrated on one side of the bottom surface of the elastic airbag, and the exhaust pipe is penetrated on the other side of the bottom surface of the elastic airbag. The bottom ends of the intake pipe and the exhaust pipe both pass through the bottom surface of the fixed cylinder, and the cooling nozzle is arranged at the bottom end of the exhaust pipe. The transmission block is arranged 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 fixed on the outer wall of the transmission block, and the two guide grooves are symmetrically opened on the inner wall of the fixed cylinder, and the guide block is slidably connected to the guide groove, and a linkage mechanism is arranged on the fixed cylinder.

[0009] As a preferred technical solution of the present invention, the linkage mechanism includes a shaft rod, a driving block, a transmission gear and a plurality of fixed teeth. The shaft rod is arranged through the top surface of the fixed cylinder, the driving block is fixedly installed at one end of the shaft rod located on the inner side of the fixed cylinder, the transmission gear is fixedly installed at the top end of the shaft rod, and a plurality of the fixed teeth are distributed in a circular array and fixedly installed on the inner wall of the support ring frame, and the transmission gear is meshed with the fixed teeth.

[0010] As a preferred technical solution of the present invention, the opposite ends of the driving block and the transmission block are both arranged as corresponding inclined surfaces, and the cooling nozzle is arranged at an angle.

[0011] As a preferred technical solution of the present invention, one-way valves with opposite flow directions are fixedly installed on the inner walls of the air intake pipe and the air outlet pipe.

[0012] As a preferred technical solution of the present invention, the processing unit also includes a support spring, an electric push rod, a linkage gear and a plurality of convex bulges. The support spring is sleeved on the outer wall of the support rod, and the two ends of the support spring are respectively fixedly connected to the support rod and the support ring. The electric push rod is rotatably installed at the bottom end of the support rod, and the linkage gear is fixedly installed at the telescopic end of the electric push rod. A plurality of the convex bulges are distributed in a circular array and fixedly installed on the inner wall of the support ring frame.

[0013] As a preferred technical solution of the present invention, the grinding structure includes a connecting rod, three mounting frames, three rotating shafts, three clamping jaws, three torsion springs, three ball bases, grinding sandpaper and three push plates. The connecting rod is rotatably mounted on the top end of the support rod. The three mounting frames are distributed in a circular array and fixedly mounted on the top outer wall of the connecting rod. The three rotating shafts are respectively rotatably mounted on the inner walls of the three mounting frames. The three clamping jaws are respectively fixedly mounted on the outer walls of the three rotating shafts. The three torsion springs are respectively mounted on the ends of the three rotating shafts, and the two ends of the torsion springs are respectively fixedly connected to the mounting frames and the rotating shafts. The three ball bases are respectively fixedly mounted on the top ends of the three clamping jaws. The grinding sandpaper is arranged between the three ball bases, and the three push plates are respectively fixedly mounted on the bottom ends of the three clamping jaws.

[0014] As a preferred technical solution of the present invention, a slip ring is slidably mounted on the outer wall of the connecting rod, an electric push rod 2 is fixedly mounted on the outer wall of the connecting rod, and the telescopic end of the electric push rod 2 is fixedly connected to the bottom surface of the slip ring, a transmission shaft is penetrated through the bottom end of the support rod, the bottom end of the transmission shaft is fixedly connected to the electric push rod 1, and the top end of the transmission shaft is connected to the connecting rod through a driven wheel and a synchronous belt transmission, a fixing ring corresponding to the fixed teeth is fixedly mounted on the inner wall of the support ring frame, and an opening corresponding to the linkage gear is provided on the fixing ring.

[0015] As a preferred technical solution of the present invention, the three ball bases are each one-third of a sphere, and the push plate and the clamping claw are arranged vertically.

[0016] The present invention has the following beneficial effects: 1. By setting the mounting arm and cooling assembly, during the welding process, the driving gear and the shaft are driven to rotate by meshing with the fixed teeth on the inner wall of the support ring frame, and the elastic airbag is further driven to perform reciprocating compression. This design can inhale and eject air to the welding position in real time, ensuring that the weld can be cooled immediately after welding, which helps to reduce the size of the heat-affected zone, reduce the risk of welding deformation, and improve the quality of the weld; 2. By setting up the processing unit, after welding is completed, the electric push rod and the servo motor work together to make the ball base rhythmically impact the weld surface. 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 purge function of the cooling nozzle, it can effectively remove the oxide fragments knocked down, keep the weld surface clean, and lay a good foundation for subsequent processing; 3. By setting up the grinding structure, after the oxide is knocked off, the electric push rod is used to adjust the clamping state to separate the ball base and unfold the internal grinding 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 detailed grinding of the weld surface. It can not only remove the remaining minor defects and smooth the weld surface, but also significantly improve the overall aesthetics and mechanical properties of the weld, and enhance its corrosion resistance and structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structural diagram of a low-pressure pipeline welding device proposed by the present invention is as follows; Figure 2 The overall structure of a low-pressure pipeline welding device proposed by the present invention is shown in FIG. Figure 2 ; Figure 3 A schematic diagram of a support ring frame structure of a low-pressure pipeline welding device proposed by the present invention Figure 1 ; Figure 4 A schematic diagram of a support ring frame structure of a low-pressure pipeline welding device proposed by the present invention Figure 2 ; Figure 5 This is a schematic diagram of the exploded structure of a fixing cylinder of a low-pressure pipeline welding device proposed by the present invention; Figure 6 for Figure 4 The enlarged structural diagram at A in the middle; Figure 7 A schematic diagram of the support rod and connecting rod structure of a low-pressure pipeline welding device proposed by the present invention; Figure 8 for Figure 7 The enlarged structural diagram at B in the middle; Fig. 9for Figure 3 Enlarged structural diagram at point C in the middle.

[0018] In the figure: 11, moving seat; 12, bracket; 13, support ring frame; 14, support rod; 15, mounting hoop; 21, welding gear ring; 22, fixed frame; 23, annular groove; 24, yielding opening; 25, servo motor; 26, driving gear; 31, mounting arm; 32, welding seat; 41, fixing cylinder; 42, elastic airbag; 43, suction 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. Bump; 71. Connecting rod; 72. Mounting frame; 73. Rotating shaft; 74. Clamp; 75. Torsion spring; 76. Ball base; 77. Grinding sandpaper; 78. Push plate; 79. Slip ring; 710. Electric push rod two; 711. Transmission shaft; 712. Fixed ring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-9 , a low-pressure pipeline welding device, comprising a welding unit and a processing unit; The welding unit includes a moving seat 11, a bracket 12, a support ring frame 13, two support rods 14 and two mounting hoops 15. The bracket 12 is fixedly mounted on the top surface of the moving seat 11, the support ring frame 13 is fixedly mounted on the top surface of the bracket 12, the two support rods 14 are symmetrically fixedly mounted on the two side surfaces of the bracket 12, the two mounting hoops 15 are respectively arranged 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 assembly corresponding to the welding seat 32; The staff can first place the low-pressure pipeline of the power system to be welded in the two installation hoops 15 on both sides, and fix the low-pressure pipeline of the power system through the installation hoops 15 so that the welding point of the two low-pressure pipelines of the power system is located in the support ring frame 13.

[0021] The driving structure includes a welding gear ring 21, three fixing frames 22, an annular groove 23, a clearance opening 24, a servo motor 25 and a driving gear 26. The welding gear ring 21 is arranged on the inner side of the support ring frame 13. The mounting arm 31 is fixedly connected to the inner wall of the welding gear ring 21. The three fixing frames 22 are distributed in an annular array and fixedly installed on the inner wall of the support ring frame 13. The annular groove 23 is provided on the side of the welding gear ring 21, and the end of the fixing frame 22 is slidably connected to the inner wall of the annular groove 23. The clearance opening 24 is provided 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 driving gear 26 is fixedly installed at the output end of the servo motor 25, and the driving gear 26 passes through the clearance opening 24 and meshes with the welding gear ring 21. The staff can start the servo motor 25 to drive the driving gear 26 to rotate forward, and the driving gear 26 can mesh with the welding gear ring 21, thereby driving the welding gear ring 21 to rotate on the inner side of the supporting 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 between the two low-pressure pipes. When the welding gear ring 21 rotates 360 degrees, the welding work can be completed.

[0022] 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 mounted on the side of the mounting arm 31, the elastic airbag 42 is fixedly mounted on the inner bottom surface of the fixed cylinder 41, the air intake pipe 43 is arranged on one side of the bottom surface of the elastic airbag 42, and the air outlet pipe 44 is arranged on the other side of the bottom surface of the elastic airbag 42. The inner walls of the air intake pipe 43 and the air outlet pipe 44 are fixedly mounted with one-way The bottom ends of the air intake pipe 43 and the air outlet pipe 44 pass through the bottom surface of the fixed cylinder 41, and the cooling nozzle 45 is arranged at the bottom end of the air outlet pipe 44, and the cooling nozzle 45 is arranged obliquely. The transmission block 46 is arranged on the inner side of the fixed cylinder 41, and the top surface of the elastic airbag 42 is fixedly connected with 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 are slidably connected with the guide grooves 48, and a linkage mechanism is arranged on the fixed cylinder 41; The linkage mechanism includes a shaft 51, a driving block 52, a transmission gear 53 and a plurality of fixed teeth 54. The shaft 51 is arranged to penetrate the top surface of the fixed cylinder 41. The driving block 52 is fixedly mounted on one end of the shaft 51 located inside the fixed cylinder 41. The ends of the driving block 52 opposite to the transmission block 46 are both arranged with corresponding inclined surfaces. The transmission gear 53 is fixedly mounted on the top of the shaft 51. A plurality of fixed teeth 54 are distributed in an annular array and fixedly mounted on the inner wall of the support ring frame 13, and the transmission gear 53 is meshed with the fixed teeth 54. During the welding process, when the mounting arm 31 rotates with the welding gear ring 21, the fixed cylinder 41 on its side can rotate synchronously. When the fixed cylinder 41 rotates, the transmission gear 53 at the end of the shaft rod 51 on it meshes with the fixed teeth 54 on the inner wall of the support ring frame 13, thereby driving the transmission gear 53 and the shaft rod 51 to rotate. When the shaft rod 51 rotates, it can drive the driving block 52 to rotate. The transmission block 46 is slidably connected to the inner wall of the fixed cylinder 41 through the guide groove 48 and the guide block 47, and the opposite ends of the driving block 52 and the transmission block 46 are set to corresponding inclined surfaces. Therefore, when the driving block 52 rotates, it can move on the inclined surface and the elastic surface. The elastic airbag 42 drives the transmission block 46 to slide back and forth under the action of its own elastic force, so that the elastic airbag 42 can be reciprocated and compressed. Since the intake pipe 43 and the outlet pipe 44 are equipped with one-way valves with opposite flow directions, when the elastic airbag 42 is stretched, air can be sucked into the elastic airbag 42 through the intake pipe 43. When the elastic airbag 42 is compressed, the gas inside it can be ejected through the outlet pipe 44 and the cooling nozzle 45, so that the welding position can be cooled. The cooling nozzle 45 is installed at the rear of the rotation direction of the welding seat 32, so it can be cooled after welding, ensuring the cooling effect at the weld.

[0023] The processing unit includes a support ring 61 and a support rod 62. The support ring 61 is fixedly mounted on the driving structure through a fixing rod. The support rod 62 is slidably mounted on the inner wall of the support ring 61. A grinding structure is provided on the top of the support rod 62. The processing unit also includes a support spring 63, an electric push rod 1 64, a linkage gear 65 and a plurality of convex hulls 66. The support spring 63 is sleeved on the outer wall of the support rod 62, and the two ends of the support spring 63 are respectively fixedly connected to the support rod 62 and the support ring 61. The electric push rod 1 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 1 64, and a plurality of convex hulls 66 are distributed in a ring array and fixedly mounted on the inner wall of the support ring frame 13; The electric push rod 64 is extended 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, and the servo motor 25 can be turned on to reverse, and the welding gear ring 21 can be driven to reverse. When the welding gear ring 21 rotates, the support rod 62 can be driven to rotate through the fixed rod and the support ring 61. When the support rod 62 rotates, due to the setting of the convex bump 66, when the linkage gear 65 contacts the convex bump 66 during the rotation of the welding gear ring 21, it can slide along the convex bump 66, so that the support rod 62 slides along the support ring 61. At this time, the grinding structure at the end can move toward the direction close to the low-pressure pipeline and impact the weld position of the low-pressure pipeline. When the linkage gear 65 is separated from the convex bump 66, the support rod 62 can slide in the opposite direction along the support ring 61 under the action of the support spring 63 for reset. After the welding gear ring 21 rotates one circle, the excess oxide on the surface of the weld can be knocked off through the above steps, and the knocked oxide can be blown off the weld with the blowing of the cooling nozzle 45.

[0024] The grinding structure includes a connecting rod 71, three mounting frames 72, three rotating shafts 73, three clamping claws 74, three torsion springs 75, three ball bases 76, grinding sandpaper pieces 77 and three push plates 78. The connecting rod 71 is rotatably mounted on the top of the support rod 62. The three mounting frames 72 are distributed in a ring 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 walls of the three mounting frames 72. The three clamping claws 74 are respectively fixedly sleeved on the outer walls of the three rotating shafts 73. The three torsion springs 75 are respectively sleeved on the ends of the three rotating shafts 73, and the two ends of the torsion spring 75 are respectively fixedly connected to the mounting frame 72 and the rotating shaft 73. The three ball bases 76 are respectively fixedly mounted on the tops of the three clamping claws 74. The three ball bases 76 are all one-third spheres. The sheet 77 is arranged between the three ball bases 76, and the three push plates 78 are respectively fixedly installed at the bottom ends of the three clamping claws 74, and the push plates 78 are arranged vertically with the clamping claws 74. The outer wall of the connecting rod 71 is slidably sleeved with a slip ring 79, and the outer wall of the connecting rod 71 is fixedly installed with an electric push rod 2 710, and the telescopic end of the electric push rod 2 710 is fixedly connected to the bottom surface of the slip ring 79. The bottom end of the support rod 62 is penetrated by a transmission shaft 711, and the bottom end of the transmission shaft 711 is fixedly connected to the electric push rod 1 64, and the top end of the transmission shaft 711 is connected to the connecting rod 71 through a driven wheel and a synchronous belt transmission. The inner wall of the support ring frame 13 is fixedly installed with a fixed ring 712 corresponding to the fixed teeth 54, and the fixed ring 712 is provided with an opening corresponding to the linkage gear 65; When knocking the oxide on the surface of the weld, the electric push rod 2 710 can drive the slip ring 79 to slide upward when it is extended, thereby pushing the push plate 78, so that the clamping claw 74 can rotate through the rotating shaft 73, and the three ball bases 76 can rotate in the direction of gathering together, so that the three ball bases 76 contact and form a complete sphere, and the grinding sandpaper pieces 77 between the three ball bases 76 can be stored and located on the inner side of the ball base 76 without affecting the appearance of the ball base 76; as the knocking of the oxide is completed, the staff can shorten the electric push rod 1 64 so that the linkage gear 65 at its telescopic end moves through the opening on the fixed ring 712 to mesh with the fixed teeth 54, and the linkage gear 65 can be located on the inner side of the fixed ring 712, and then the electric push rod 2 710 is shortened to drive the slip ring 79 to slide downward. After the slip ring 79 slides downward, under the action of the torsion spring 75 The clamping jaw 74 can be reversed to separate the three ball bases 76. During the separation of the three ball bases 76, the grinding sandpaper piece 77 inside thereof can be unfolded, and the servo motor 25 can be turned on and reversed to 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 be extended. At this time, the linkage gear 65 is 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 grinding sandpaper piece 77 on the inside of the ball base 76 fits the weld. As the welding gear ring 21 rotates, the linkage gear 65 meshes with the fixed teeth 54, and then can drive the linkage gear 65 and the electric push rod 64 to rotate, and drive the connecting rod 71 to rotate through the transmission shaft 711, the driven wheel, and the synchronous belt, so that the grinding sandpaper piece 77 rotates to grind the weld.

[0025] The specific working principle of the present invention is as follows: When in use, the staff can first place the low-pressure pipeline of the power system to be welded in the two installation hoops 15 on both sides respectively, and fix the low-pressure pipeline of the power system through the installation hoop 15, so that the welding point of the two low-pressure pipelines of the power system is located in the support ring frame 13, and then the staff can start the servo motor 25 to drive the driving gear 26 to rotate forward, and the driving gear 26 is engaged with the welding gear ring 21, and then the welding gear ring 21 can be driven to rotate on the inner side of 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, and the mounting arm 31 and the welding seat 32 can be synchronously rotated under the drive of the welding gear ring 21 to weld the connection of the two low-pressure pipelines. When the welding gear ring 21 rotates 360 degrees, the welding work can be completed. The working principle and connection method of the mounting arm 31 and the welding seat 32 are all existing mature technologies, which will not be described in detail here. During the welding process, when the mounting arm 31 rotates with the welding gear ring 21, the fixed cylinder 41 on its side can rotate synchronously. When the fixed cylinder 41 rotates, the transmission gear 53 at the end of the shaft rod 51 on it meshes with the fixed teeth 54 on the inner wall of the support ring frame 13, thereby driving the transmission gear 53 and the shaft rod 51 to rotate. When the shaft rod 51 rotates, it can drive the driving block 52 to rotate. The transmission block 46 is slidably connected to the inner wall of the fixed cylinder 41 through the guide groove 48 and the guide block 47, and the opposite ends of the driving block 52 and the transmission block 46 are set to corresponding inclined surfaces. Therefore, when the driving block 52 rotates, it can move on the inclined surface and the elastic surface. The elastic airbag 42 drives the transmission block 46 to slide back and forth under the action of its own elastic force, so that the elastic airbag 42 can be reciprocated and compressed. Since the 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 sucked 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, so that the welding position can be cooled. The cooling nozzle 45 is installed at the rear of the rotation direction of the welding seat 32, so it can be cooled after welding, ensuring the cooling effect at the weld. When the electric push rod 2 710 is extended, the slip ring 79 can be driven to slide upward, thereby pushing the push plate 78, so that the clamping claw 74 can be rotated through the rotating shaft 73, and the three ball bases 76 can be rotated in the direction of gathering together, so that the three ball bases 76 are in contact and form a complete sphere, and the sandpaper sheets 77 between the three ball bases 76 can be stored and located on the inner side of the ball base 76 without affecting the appearance of the ball base 76; after the ball base 76 is folded, the electric push rod 1 64 can be extended again, so that the linkage gear 65 at the telescopic end of the electric push rod 1 64 can contact the inner wall of the support ring frame 13, and the servo motor 25 can be turned on to reverse, and the welding gear ring 21 can be driven to reverse. When the welding gear ring 21 rotates, it can be turned on by the fixing 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 bump 66, when the linkage gear 65 rotates with the welding gear ring 21 and contacts the convex bump 66, the support rod 62 can slide along the convex bump 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 toward the direction close to the low-pressure pipeline and hit the weld position of the low-pressure pipeline. When the linkage gear 65 is separated from the convex bump 66, the support rod 62 can slide in the opposite direction along the support ring 61 under the action of the support spring 63, so as to reset and hit again. After the welding gear ring 21 rotates one circle, 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, accompanied by the blowing of the cooling nozzle 45, the knocked oxide can be blown off the weld. As the knocking of the oxide is completed, the staff can shorten the electric push rod 1 64 so that the linkage gear 65 at its telescopic end moves through the opening on the fixed ring 712 and engages with the fixed teeth 54, and the linkage gear 65 can be located on the inner side of the fixed ring 712, and then the electric push rod 2 710 is shortened to drive the slip ring 79 to slide downward. After the slip ring 79 slides downward, the clamping claw 74 can be reversed under the action of the torsion spring 75, so that the three ball bases 76 are separated. During the separation of the three ball bases 76, the grinding sandpaper sheet 77 on the inside can be unfolded, and the servo motor 25 can be turned on and reversed to 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 1 64 can be extended. At this time, the linkage gear 65 It abuts against the inner wall of the fixed ring 712, so 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 grinding sandpaper piece 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 engages with the fixed teeth 54, which can drive the linkage gear 65 and the electric push rod 64 to rotate, and drives the connecting rod 71 to rotate through the transmission shaft 711, the driven wheel, and the synchronous belt, so that the grinding sandpaper piece 77 rotates to grind the weld. After the welding gear ring 21 rotates 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, so that the linkage gear 65 moves downward and separates from the fixed teeth 54 and resets, and the staff can remove the device of the low-pressure pipeline of the power system after welding.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A low-pressure pipeline welding device, characterized in that: It includes a welding unit and a processing unit; The welding unit comprises a movable seat (11), a bracket (12), a support ring frame (13), two support rods (14) and two mounting hoops (15); the bracket (12) is fixedly mounted on the top surface of the movable seat (11); the support ring frame (13) is fixedly mounted on the top surface of the bracket (12); the two support rods (14) are symmetrically fixedly mounted on two side surfaces of the bracket (12); the two mounting hoops (15) are respectively arranged at the ends of the two support rods (14); a driving structure is arranged on the support ring frame (13); a mounting arm (31) is arranged on the driving structure; a welding seat (32) is arranged at the end of the mounting arm (31); and a cooling component corresponding to the welding seat (32) is arranged on the side surface of the mounting arm (31); The processing unit comprises a support ring (61) and a support rod (62); the support ring (61) is fixedly mounted on the driving structure via a fixing rod; the support rod (62) is slidably mounted on the inner wall of the support ring (61); and a polishing structure is provided at the top end of the support rod (62).

2. A low-pressure pipeline welding device according to claim 1, characterized in that: The driving structure comprises a welding gear ring (21), three fixing frames (22), an annular groove (23), a clearance opening (24), a servo motor (25) and a driving gear (26); the welding gear ring (21) is arranged on the inner side of a supporting ring frame (13); the mounting arm (31) is fixedly connected to the inner wall of the welding gear ring (21); the three fixing frames (22) are distributed in an annular array and fixedly installed on the inner wall of the supporting ring frame (13); the annular groove (23) is provided on the side of the welding gear ring (21); the end of the fixing frame (22) is slidably connected to the inner wall of the annular groove (23); the clearance opening (24) is provided on the outer wall of the supporting ring frame (13); the servo motor (25) is fixedly installed on the outer wall of the supporting ring frame (13); the driving gear (26) is fixedly installed at the output end of the servo motor (25); and the driving gear (26) passes through the clearance opening (24) and meshes with the welding gear ring (21).

3. A low-pressure pipeline welding device according to claim 2, characterized in that: The cooling assembly comprises 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), wherein the fixed cylinder (41) is fixedly mounted on the side of the mounting arm (31), the elastic airbag (42) is fixedly mounted on the inner bottom surface of the fixed cylinder (41), the air intake pipe (43) is arranged through one side of the bottom surface of the elastic airbag (42), the air outlet pipe (44) is arranged through the other side of the bottom surface of the elastic airbag (42), and the air intake pipe (43) and the air outlet pipe (44) are arranged through the other side of the bottom surface of the elastic airbag (42). The bottom ends of the air pipes (44) pass through the bottom surface of the fixed cylinder (41), and the cooling nozzle (45) is arranged at the bottom end of the air outlet pipe (44), the transmission block (46) is arranged on the inner side of 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), the two guide grooves (48) are symmetrically opened on the inner wall of the fixed cylinder (41), and the guide blocks (47) are slidably connected to the guide grooves (48), and a linkage mechanism is arranged on the fixed cylinder (41).

4. A low-pressure pipeline welding device according to claim 3, characterized in that: The linkage mechanism comprises a shaft (51), a driving block (52), a transmission gear (53) and a plurality of fixed teeth (54); the shaft (51) is arranged to penetrate the top surface of the fixed cylinder (41); the driving block (52) is fixedly mounted on one end of the shaft (51) located inside the fixed cylinder (41); the transmission gear (53) is fixedly mounted on the top end of the shaft (51); a plurality of fixed teeth (54) are distributed in an annular array and fixedly mounted on the inner wall of the supporting ring frame (13); and the transmission gear (53) meshes with the fixed teeth (54).

5. A low-pressure pipeline welding device according to claim 4, characterized in that: The ends of the driving block (52) and the transmission block (46) opposite to each other are both arranged as corresponding inclined surfaces, and the cooling nozzle (45) is arranged in an inclined manner.

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

7. A low-pressure pipeline welding device according to claim 1, characterized in that: The processing unit further comprises a support spring (63), an electric push rod (64), a linkage gear (65) and a plurality of convex hulls (66); the support spring (63) is sleeved on the outer wall of the support rod (62), and the two ends of the support spring (63) are respectively fixedly connected to the support rod (62) and the support ring (61); 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); and the plurality of convex hulls (66) are distributed in a ring array and fixedly mounted on the inner wall of the support ring frame (13).

8. A low-pressure pipeline welding device according to claim 7, characterized in that: The grinding structure comprises a connecting rod (71), three mounting frames (72), three rotating shafts (73), three clamping claws (74), three torsion springs (75), three ball bases (76), a grinding sandpaper sheet (77) and three push plates (78), wherein the connecting rod (71) is rotatably mounted on the top end of the support rod (62), the three mounting frames (72) are distributed in a circular array and fixedly mounted on the top outer wall of the connecting rod (71), the three rotating shafts (73) are rotatably mounted on the inner walls of the three mounting frames (72), and the three The clamping jaws (74) are respectively 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 frame (72) and the rotating shaft (73); the three ball bases (76) are respectively fixedly mounted on the top ends of the three clamping jaws (74); the sandpaper sheets (77) are arranged between the three ball bases (76); and the three push plates (78) are respectively fixedly mounted on the bottom ends of the three clamping jaws (74).

9. A low-pressure pipeline welding device according to claim 8, characterized in that: The outer wall of the connecting rod (71) is slidably sleeved with a slip ring (79), the outer wall of the connecting rod (71) is fixedly mounted with an electric push rod 2 (710), and the telescopic end of the electric push rod 2 (710) is fixedly connected to the bottom surface of the slip ring (79), the bottom end of the support rod (62) is penetrated by a transmission shaft (711), the bottom end of the transmission shaft (711) is fixedly connected to the electric push rod 1 (64), and the top end of the transmission shaft (711) is connected to the connecting rod (71) through a driven wheel and a synchronous belt transmission, and the inner wall of the support ring frame (13) is fixedly mounted with a fixed ring (712) corresponding to the fixed teeth (54), and the fixed ring (712) is provided with an opening corresponding to the linkage gear (65).

10. A low-pressure pipeline welding device according to claim 8, characterized in that: The three ball bases (76) are each one-third of a sphere, and the push plate (78) and the clamping claw (74) are arranged vertically.

Images