Refrigeration pipe welding positioning method and positioning device

Abstract

The invention discloses a refrigeration pipe welding positioning method and device. The method comprises the following steps that S1, branch pipes are placed in all storage boxes; s2, the main pipeline is placed in a matching groove of the supporting frame, and the main pipeline is fixed through cooperation with a pressing ring; s3, a third electric cylinder is started, the third electric cylinder drives a supporting frame and the main pipeline to move to be close to the welding gun, and a branch pipe of the main pipeline moves to cross the welding gun; s4, a first electric cylinder is started, and the first electric cylinder drives a synchronous plate and an ejector sleeve to move; the motor, the first chain wheel, the second chain wheel, the chain and the hollow rotating disc are matched to drive the vortex line groove and linear groove linkage adjusting block and the rolling wheel to move, the purposes of clamping positioning and circle center correction of the branch pipe are achieved, the branch pipe is corrected to the position concentric with the disc, the coaxiality of the branch pipe and a main pipeline branch pipe is guaranteed, and the machining efficiency is improved. And the quality problems of insufficient welding, welding skips, poor welding seam forming and the like caused by positioning deviation are avoided.

Description

Technical Field

[0001] This invention belongs to the field of welding processing technology, and specifically relates to a method and device for positioning refrigeration pipe welding. Background Technology

[0002] Refrigeration pipes are tubular core components in refrigeration systems used to transport refrigerant. They mainly connect key components such as compressors, condensers, and evaporators, providing channels for the circulation of refrigerant. They rely on the phase change and flow of refrigerant within the pipes to achieve heat absorption and release, thereby achieving the effect of cooling. They are commonly made of metals with good thermal conductivity and corrosion resistance, such as copper, aluminum, and stainless steel.

[0003] Positioning the refrigeration pipe during welding is a pre-welding operation. The core of this operation is to align the ends of the refrigeration pipes to be welded, ensure the coaxiality of the pipes, strictly control the misalignment of the pipe ends and the welding gap within the process requirements, and fix the pipes in the preset position to prevent pipe displacement or deformation during the welding process, thereby ensuring the quality of the weld.

[0004] Currently, in the production of refrigeration pipes, the connection between branch pipes and main pipes is mostly achieved using traditional processes such as manual flame brazing and manual high-frequency brazing. Manual flame brazing uses an oxy-acetylene or propane flame as a heat source, with the operator holding a welding torch and heating the joint between the main pipe and the branch pipe to complete the welding and fixing of the pipes. Manual high-frequency brazing relies on the principle of high-frequency induction heating, using a dedicated induction coil to quickly and centrally heat the pipe joint area to achieve the welding connection between the branch pipe and the main pipe. Although the above methods can weld the branch pipes and the main pipe together, in practice, they generally adopt a serial operation method of welding one point at a time, which has the disadvantage of low efficiency: each joint needs to complete preheating, welding, and cooling in sequence, resulting in extremely low single-station capacity; the operation is highly dependent on manual labor, with high labor intensity, and long-term operation is prone to efficiency decline and quality fluctuations. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of low efficiency and unreliable quality in welding the main refrigeration pipe and branch pipe in the prior art, and to provide a refrigeration pipe welding positioning method and positioning device.

[0006] The objective of this invention can be achieved through the following technical solutions: A method for welding and positioning refrigeration pipes includes the following steps: S1: Place the branch pipes into each storage box; S2: Place the main pipe into the matching slot of the support frame and fix the main pipe in place with the pressure ring; S3: Start the third electric cylinder. The third electric cylinder drives the support frame and the main pipe to move closer to the welding gun, so that the main pipe branch moves past the welding gun. S4: Start the first electric cylinder. The first electric cylinder drives the synchronous plate and the push tube to move. The push tube pushes the lowest branch tube, pushing the branch tube from section AB to section CE, so that the middle part of the branch tube corresponds to the roller, and the end of the branch tube away from the storage box corresponds to the heating wire. S5: Start the motor. The motor drives the hollow turntable to rotate with the cooperation of the first sprocket, the second sprocket and the chain. The hollow turntable drives the adjusting block and the roller to approach the branch pipe with the cooperation of the spiral groove and the straight groove. The roller contacts the branch pipe and corrects it. S6: After the branch tube is positioned, start the heating wire to heat the end of the branch tube away from the storage box, so that the end of the branch tube is widened; S7: Start the first motor. The first motor drives the lead screw to rotate. The rotation of the lead screw drives the slider and push plate to descend to the position corresponding to the branch pipe. After descending, start the second electric cylinder. The second electric cylinder pushes the moving cylinder, which moves the push plate and pushes the branch pipe, so that the branch pipe moves and is connected to the main pipe branch pipe. The branch pipe moves from the CE section to the DF section, so that the end of the branch pipe away from the storage box corresponds to the welding gun. S8: After the branch pipe cools down, start the welding gun and the second motor. The second motor drives the gear to rotate, and the gear rotates to move the rack. During the movement of the rack, the outer gear ring and the welding gun rotate to weld the branch pipe and the main pipe together. S9: Start the third electric cylinder. The third electric cylinder drives the support frame and the main pipe to move away from the welding gun. After moving, the pressure ring loses its fixation. Rotate the pressure ring to remove the welded main pipe and place a new main pipe.

[0007] Preferably, in step S4, after the bottommost branch tube is pushed out, the first electric cylinder drives the synchronizing plate and the push tube to move again, so that the push tube moves out of the storage box, thereby allowing the branch tube in the storage box to fall down and align the bottommost branch tube with the first through hole, in preparation for the subsequent push-out of the branch tube.

[0008] Preferably, in step S5, the motor drives the second sprocket to rotate, and the second sprocket, in conjunction with the chain, causes the first sprocket to rotate. The rotation of the first sprocket causes the hollow turntable to rotate, and the rotation of the hollow turntable causes the vortex groove to rotate. During the rotation of the vortex groove, it cooperates with the straight groove, causing the second slide rod to slide within the vortex groove, while simultaneously causing the first slide rod to slide within the straight groove. With the cooperation of the synchronizing rod, the first slide rod drives the adjusting block to move towards the position of the second through hole, so that the roller contacts the branch pipe, clamps and positions the branch pipe, and corrects the branch pipe to a position concentric with the disc.

[0009] This invention also provides a refrigeration pipe welding positioning device, including a base plate. Above the base plate are sequentially arranged a material storage and discharging unit, a branch pipe feeding unit, a branch pipe positioning unit, a welding unit, and a main pipe positioning and feeding unit. The branch pipe positioning unit includes multiple evenly arranged fixing plates. Symmetrically arranged discs are connected to the upper surface of the fixing plates. Each disc has a second through hole in its center. Three second T-shaped slide rails arranged in a circumferential array are connected to the sides of the discs that are close to each other. Adjusting blocks are slidably connected to the outer sides of the second T-shaped slide rails. A roller is rotatably connected to the end of the adjusting block near the second through hole. Synchronizing rods are connected to the sides of adjacent adjusting blocks. First sliding rods are connected to both ends of the synchronization plate. Straight grooves are opened on the discs corresponding to the positions of the first sliding rods. The first sliding rods are slidably connected within the straight grooves. A hollow positioning sleeve is provided on the side of the disc near the center of the base plate away from the roller. A hollow turntable is rotatably connected to the outer side of the hollow positioning sleeve. Second sliding rods are connected to the end of the first sliding block near the hollow turntable away from the synchronization rod. Three vortex grooves arranged in a circumferential array are opened on the hollow turntable corresponding to the positions of the second sliding rods.

[0010] Preferably, a first sprocket is connected to the side of the hollow turntable away from the disc, the first sprocket is located outside the hollow positioning sleeve, a second sprocket is provided below the disc corresponding to the position of the first sprocket, a chain meshes between the first sprocket and the second sprocket, a motor is connected to the upper surface of the fixed plate corresponding to the position between the discs, the motor output end passes through the disc and is connected to the second sprocket.

[0011] Preferably, the material storage and discharging unit includes multiple evenly arranged storage boxes. A first through hole is symmetrically arranged below the storage box. A support platform is connected above the base plate at a position corresponding to the storage box and away from the center of the base plate. A first electric cylinder is connected to both ends of the upper surface of the support platform. A synchronization plate is connected to the output end of the first electric cylinder. Multiple evenly arranged push tubes are connected to the side of the synchronization plate near the storage box and at the position corresponding to the through hole.

[0012] Preferably, the branch pipe feeding unit includes symmetrically arranged moving cylinders, each of which is rotatably connected to a lead screw. A slider is threaded to the outside of the lead screw, and a push plate is connected between the sliders. The upper end of the lead screw passes through the moving cylinder and is connected to a first motor fixed to the upper surface of the moving cylinder. A second electric cylinder is connected to the middle of the moving cylinder near the storage box.

[0013] Preferably, multiple evenly arranged heating wires are connected to the upper surface of the base plate at a position corresponding to the hollow turntable away from the storage box.

[0014] Preferably, the welding unit includes multiple uniformly arranged external toothed rings, with a welding gun connected to the inner side of each external toothed ring. Hollow positioning discs are symmetrically arranged on the upper surface of the base plate corresponding to the positions on both sides of the external toothed rings. A rack is provided below each external toothed ring, and the external toothed rings mesh with the racks. A gear meshes with one end of the rack, and a second motor is connected to the side of the gear near the storage box.

[0015] Preferably, the main pipe positioning and feeding unit includes a support frame, a matching groove is provided on the top of the support frame, pressure rings are rotatably connected to both ends of the support frame away from the outer toothed ring, a third through hole is provided at the end of the pressure ring near the outer toothed ring, pressure blocks are rotatably connected to the top of the support frame corresponding to the third through hole, and a third electric cylinder is rotatably connected to the side of the support frame away from the outer toothed ring.

[0016] The beneficial effects of this invention are: 1) Through the cooperation of the motor, first sprocket, second sprocket, chain and hollow turntable, the vortex groove and straight groove linkage adjustment block and roller are driven to move, which realizes the purpose of clamping and positioning of the branch pipe and center correction. The branch pipe is corrected to the position of the same center as the disc, ensuring the coaxiality of the branch pipe and the main pipe, and avoiding quality problems such as false welding, missing welding and poor weld formation caused by positioning deviation.

[0017] 2) Through the coordinated operation of the material storage and discharge unit, the branch pipe feeding unit, the branch pipe positioning unit, the welding unit, and the main pipe positioning and feeding unit, the purpose of batch material storage, automatic material pushing, automatic positioning of branch pipes, main pipe fixing and feeding, and welding of branch pipes and main pipe straight pipes is realized. There is no need for manual repeated clamping, positioning, and hand-held welding operations, which shortens the welding cycle and improves efficiency.

[0018] 3) The main pipe is fixed by the matching groove, pressure ring and pressure block of the support frame. The branch pipe is clamped and positioned by rollers without shaking or displacement. During the welding process, both the main refrigeration pipe and the branch pipe remain stable, which effectively ensures the forming quality of the weld.

[0019] 4) The outer gear ring is driven to rotate at a constant speed by the second motor, gear, and rack, so that the welding gun can be welded at a constant speed around the branch pipe, which makes the weld fully fused and uniformly formed, thus improving the yield of refrigeration pipe welding. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a cross-sectional side view of the present invention; Figure 4 This is a perspective view of the material storage box in this invention; Figure 5 This is a cross-sectional view of the material storage box in this invention; Figure 6 This is an exploded view of the push plate in this invention; Figure 7 This is a perspective view of the disk in this invention; Figure 8 This is a cross-sectional front view of the fixing plate in this invention; Figure 9 This is a schematic diagram of the first explosion at the disk in this invention; Figure 10 This is a second explosion diagram of the disk in this invention; Figure 11 This is a perspective view of the rack in this invention; Figure 12 This is a schematic diagram of an explosion at the external toothed ring in this invention; Figure 13 This is a schematic diagram of an explosion at the support frame in this invention.

[0022] In the diagram: 1. Base plate; 2. Storage box; 3. Moving cylinder; 4. Fixed plate; 5. Hollow positioning plate; 6. Support frame; 7. Heating wire; 21. First through hole; 22. First electric cylinder; 23. Support platform; 24. Synchronizing plate; 25. Push tube; 31. First T-shaped slide rail; 32. First T-shaped slide groove; 33. Second electric cylinder; 34. Slider; 35. Push plate; 36. Movable groove; 37. Lead screw; 38. First motor; 401. Disc; 402. Fixed tube; 403. Second through hole; 41. Second T-shaped slide rail; 411. Adjusting block; 412. Roller; 42. Synchronizing rod; 421. First slide rod; 422. Straight groove; 43. Hollow turntable; 431. Hollow positioning sleeve; 432. Scroll groove; 433. Second slide rod; 44. First sprocket; 441. Second sprocket; 442. Chain; 443. Motor; 51. External gear ring; 52. Positioning ring; 53. Positioning groove; 54. Welding gun; 55. Rack; 56. Limiting groove; 57. Gear; 58. Second motor; 61. Matching groove; 62. Pressure ring; 63. Third through hole; 64. Pressure block; 65. Third T-shaped slide rail; 66. Second T-shaped slide groove; 67. Third electric cylinder. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1 and Figure 3As shown, a method and device for welding and positioning refrigeration pipes includes a base plate 1. Above the base plate 1, there are sequentially arranged a material storage and discharging unit, a branch pipe feeding unit, a branch pipe positioning unit, a welding unit, and a main pipe positioning and feeding unit.

[0025] Please see Figure 1 , Figures 3 to 5 As shown, the storage and discharge unit is used to store multiple branch pipes in the storage box 2 and push the branch pipes out one by one through the push tube 25. The storage and discharge unit includes multiple evenly arranged storage boxes 2. The storage boxes 2 are connected to the base plate 1 and are used to store branch pipes.

[0026] The storage box 2 has a symmetrically arranged first through hole 21 at the bottom. The first through hole 21 is used to enter the push tube 25 and to remove the branch tube.

[0027] A support platform 23 is connected above the base plate 1, corresponding to the storage box 2 and located away from the middle of the base plate 1. The support platform 23 is used to install and fix the first electric cylinder 22.

[0028] The upper surface of the support platform 23 is connected to the first electric cylinder 22 near both ends. The output end of the first electric cylinder 22 is connected to the synchronization plate 24. The synchronization plate 24 is connected to a plurality of evenly arranged push tubes 25 on the side near the storage box 2 and at the position corresponding to the through hole. The first electric cylinder 22 is used to drive the synchronization plate 24 and the push tubes 25 to move. The synchronization plate 24 is used to make the plurality of push tubes 25 move synchronously. The push tubes 25 are used to push the branch tubes out of the storage box 2.

[0029] Please see Figure 1 , Figure 3 and Figure 6 As shown, the branch pipe feeding unit is used to push multiple fixed branch pipes toward the welding gun 54 for welding. The branch pipe feeding unit includes symmetrically arranged moving cylinders 3, and the storage box 2 is located between the moving cylinders 3. The moving cylinders 3 are used to drive the push plate 35 to move and to limit the position of the slider 34.

[0030] A lead screw 37 is rotatably connected inside the movable cylinder 3. A slider 34 is threadedly connected to the outside of the lead screw 37, and the slider 34 is slidably connected to the movable cylinder 3. A push plate 35 is connected between the sliders 34. The upper end of the lead screw 37 passes through the movable cylinder 3 and is connected to the first motor 38 fixed to the upper surface of the movable cylinder 3. The lead screw 37 is used to drive the slider 34 to rise and fall, the slider 34 is used to drive the push plate 35 to rise and fall, the push plate 35 is used to push the branch pipe, and the first motor 38 is used to drive the lead screw 37 to rotate.

[0031] The movable cylinder 3 has a movable groove 36 at the position corresponding to the push plate 35. The push plate 35 is slidably connected in the movable groove 36, which provides the necessary space for the push plate 35 to move.

[0032] A first T-shaped slide rail 31 is symmetrically arranged on the upper surface of the base plate 1 corresponding to the position of the moving cylinder 3. A first T-shaped groove 32 is opened below the moving cylinder 3 corresponding to the position of the first T-shaped slide rail 31. The first T-shaped slide rail 31 and the first T-shaped groove 32 are slidably connected. A second electric cylinder 33 is connected to the middle of the side of the moving cylinder 3 near the storage box 2. A support plate is connected to the upper surface of the base plate 1 corresponding to the position of the second electric cylinder 33. The second electric cylinder 33 is connected to the support plate. Through the cooperation of the first T-shaped slide rail 31 and the first T-shaped groove 32, the moving cylinder 3 can move and be limited. The second electric cylinder 33 is used to drive the moving cylinder 3 to move.

[0033] Please see Figure 1 , Figure 3 , Figures 7 to 10 As shown, the branch pipe positioning unit is used to position the branch pipe, correct the center of the branch pipe, and enable the branch pipe to move horizontally. The branch pipe positioning unit includes multiple evenly arranged fixing plates 4. The fixing plates 4 are set above the base plate 1 away from the first electric cylinder 22, and the fixing plates 4 correspond to the storage box 2. The fixing plates 4 are connected to the base plate 1 by screws.

[0034] The upper surface of the fixed plate 4 is connected to symmetrically arranged discs 401, which are used to assist in adjusting the position of the adjusting block 411 and the roller 412.

[0035] Each circular block has a second through hole 403 in the middle, which is used to pass through the branch pipe.

[0036] Three circumferentially arranged fixing tubes 402 are provided between the disks 401. The fixing tubes 402 are connected to the disks 401 by screws and are used to enhance the stability of the disks 401.

[0037] Three second T-shaped slide rails 41 arranged in a circular array are connected to each other on one side of the disc 401. An adjusting block 411 is slidably connected to the outside of the second T-shaped slide rail 41. A roller 412 is rotatably connected to one end of the adjusting block 411 near the second through hole 403. The second T-shaped slide rail 41 is used to limit the position of the adjusting block 411. The adjusting block 411 is used to drive the roller 412 to move. The roller 412 is used to position the branch pipe and enable the branch pipe to move horizontally after it is fixed.

[0038] The rollers 412 are arranged in an inverted equilateral triangle. The rollers 412 are perpendicular to the disk 401. This arrangement ensures the stability of the branch pipe positioning and also ensures that the branch pipe can move horizontally after positioning.

[0039] Each adjacent adjusting block 411 is connected to a synchronizing rod 42 on its side. The synchronizing rod 42 is used to make the adjacent adjusting blocks 411 move synchronously.

[0040] Both ends of the synchronization plate 24 are connected to a first slide rod 421. The disc 401 is provided with a straight groove 422 at the position corresponding to the first slide rod 421. The first slide rod 421 is slidably connected in the straight groove 422. The cooperation between the first slide rod 421 and the straight groove 422 is used to determine the movement range of the adjustment block 411 and prevent the adjustment block 411 from disengaging from the second T-shaped slide rail 41.

[0041] A hollow positioning sleeve 431 is provided on the side of the disc 401 near the middle of the base plate 1 away from the roller 412. A hollow turntable 43 is rotatably connected to the outside of the hollow positioning sleeve 431. The hollow turntable 43 is set with the disc 401 at the same center. The hollow positioning sleeve 431 is used to limit the position of the hollow turntable 43. The hollow turntable 43 is used to assist all the adjusting blocks 411 to move synchronously.

[0042] The first slider 34 near the hollow turntable 43 is connected to a second slider 433 at the end away from the synchronizing rod 42. The hollow turntable 43 has three circumferentially arranged spiral grooves 432 at the position corresponding to the second slider 433. The second slider 433 is slidably connected in the spiral groove 432. The second slider 433 and the spiral groove 432 are used to make all the adjusting blocks 411 move synchronously.

[0043] A first sprocket 44 is connected to the side of the hollow turntable 43 away from the disc 401. The first sprocket 44 is located outside the hollow positioning sleeve 431. A second sprocket 441 is provided below the disc 401 at the position corresponding to the first sprocket 44. A chain 442 meshes between the first sprocket 44 and the second sprocket 441. A motor 443 is connected to the upper surface of the fixing plate 4 at the position corresponding to the disc 401. The output end of the motor 443 passes through the disc 401 and is connected to the second sprocket 441. The first sprocket 44, in conjunction with the second sprocket 441 and the chain 442, is used to rotate the hollow turntable 43. The motor 443 is used to drive the second sprocket 441 to rotate.

[0044] Please see Figures 1 to 3 As shown, multiple evenly arranged heating wires 7 are connected to the upper surface of the base plate 1 at a position away from the storage box 2 corresponding to the hollow turntable 43, and the heating wires 7 correspond to the hollow turntable 43. The heating wires 7 are used to heat the ends of the branch pipes.

[0045] Please see Figure 1 , Figure 3 , Figure 11 and Figure 12 As shown, the welding unit is used to weld the branch pipe to the main pipe. The welding unit includes multiple uniformly arranged external toothed rings 51. The external toothed rings 51 are positioned at the corresponding heating wire 7 and away from the hollow turntable 43. The external toothed rings 51 are used to drive the welding gun 54.

[0046] A welding gun 54 is connected to the inner side of the external toothed ring 51. The welding gun 54 is used to weld the branch pipe to the position of the main pipe branch pipe.

[0047] Positioning rings 52 are connected to both sides of the external gear ring 51. Hollow positioning disks 5 are symmetrically arranged on the upper surface of the base plate 1, corresponding to the positions of the two sides of the external gear ring 51. Positioning slots 53 are opened in the hollow positioning disks 5 corresponding to the positions of the positioning rings 52. The positioning rings 52 are rotatably connected in the positioning slots 53. Through the cooperation of the positioning rings 52, the hollow positioning disks 5, and the positioning slots 53, the position of the external gear ring 51 can be limited.

[0048] Each external gear ring 51 is provided with a rack 55 below it. The external gear ring 51 meshes with the rack 55. The base plate 1 has a limiting groove 56 corresponding to the position of the rack 55. The rack 55 is slidably connected in the limiting groove 56. The rack 55 is used to drive all external gear rings 51 to rotate. The limiting groove 56 is used to limit the position of the rack 55.

[0049] A gear 57 is meshed on one end of the rack 55. A second motor 58 is connected to the side of the gear 57 near the storage box 2. The second motor 58 is connected to the base plate 1. The gear 57 is used to drive the rack 55 to move, and the second motor 58 is used to drive the gear 57 to rotate.

[0050] Please see Figure 1 , Figure 3 and Figure 13 As shown, the main pipe positioning and feeding unit is used to fix the main pipe and feed the branch end of the main pipe into the outer toothed ring 51. The main pipe positioning and feeding unit includes a support frame 6, which is used to support the main pipe.

[0051] A matching groove 61 is provided above the support frame 6. The matching groove 61 is opened according to the shape of the main pipe and is used to limit the position of the main pipe.

[0052] Pressure rings 62 are rotatably connected at both ends of the support frame 6, away from the external toothed ring 51. The pressure rings 62 are used to press the main pipe to prevent the main pipe from moving or shaking.

[0053] The pressure ring 62 has a third through hole 63 at one end near the outer toothed ring 51. A symmetrically arranged pressure block 64 is rotatably connected above the support frame 6 at the position corresponding to the third through hole 63. The third through hole 63 is used to pass through the pressure block 64, and the pressure block 64 is used to press the pressure ring 62.

[0054] A symmetrically arranged third T-shaped slide rail 65 is connected to the upper surface of the base plate 1 at the position corresponding to the support frame 6. A symmetrically arranged second T-shaped slide groove 66 is opened on the support frame 6 at the position corresponding to the third T-shaped slide rail 65. The third T-shaped slide rail 65 and the second T-shaped slide groove 66 are slidably connected. A symmetrically arranged third electric cylinder 67 is connected to the side of the support frame 6 away from the outer toothed ring 51. The third electric cylinder 67 is connected to the base plate 1. Through the cooperation of the third T-shaped slide rail 65 and the second T-shaped slide groove 66, the position of the support frame 6 can be limited. The third electric cylinder 67 is used to adjust the position of the support frame 6.

[0055] It is worth noting that: the length of segment AB is equal to the length of segments CE and DF, the length of segment BC is greater than the thickness of push plate 35, segment AB is the initial position of branch pipe, segment CE is the positioning position of branch pipe, and segment DF is the welding position of branch pipe.

[0056] Based on the refrigeration pipe welding positioning device provided above, this embodiment also provides a refrigeration pipe welding positioning method, including the following steps: S1: Place the branch pipes into each storage box 2.

[0057] S2: Place the main pipe into the matching groove 61 of the support frame 6, and fix the main pipe with the pressure ring 62.

[0058] The pressure ring 62 is rotated to make it fit against the upper surface of the support frame 6. After it fits, the pressure ring 62 is rotated to press the upper surface of the pressure ring 62 tightly, thus fixing the pressure ring 62.

[0059] S3: Start the third electric cylinder 67. The third electric cylinder 67 drives the support frame 6 and the main pipe to move closer to the welding gun 54, so that the main pipe branch moves past the welding gun 54.

[0060] S4: Start the first electric cylinder 22. The first electric cylinder 22 drives the synchronous plate 24 and the push tube 25 to move, so that each push tube 25 enters the storage box 2 through the first through hole 21 and pushes the corresponding branch tube at the bottom of the storage box 2, pushing the branch tube from section AB to section CE, so that the middle part of the branch tube corresponds to the roller 412, and the end of the branch tube away from the storage box 2 corresponds to the heating wire 7.

[0061] After the bottom branch tube is pushed out, the first electric cylinder 22 drives the synchronous plate 24 and the push tube 25 to move again, so that the push tube 25 is moved out of the storage box 2, so that the branch tube in the storage box 2 can fall down and the bottom branch tube aligns with the first through hole 21, in preparation for the subsequent push of the branch tube.

[0062] S5: Start motor 443. With the cooperation of first sprocket 44, second sprocket 441 and chain 442, motor 443 drives hollow turntable 43 to rotate. With the cooperation of spiral groove 432 and straight groove 422, hollow turntable 43 drives adjusting block 411 and roller 412 to approach the branch pipe. Roller 412 contacts and corrects the branch pipe.

[0063] In this system, motor 443 drives second sprocket 441 to rotate. Second sprocket 441, in conjunction with chain 442, causes first sprocket 44 to rotate. The rotation of first sprocket 44 drives hollow turntable 43 to rotate. Hollow turntable 43's rotation drives spiral groove 432 to rotate. During the rotation of spiral groove 432, it engages with straight groove 422, causing second slide rod 433 to slide within spiral groove 432, while simultaneously causing first slide rod 421 to slide within straight groove 422. First slide rod 421 is synchronized with synchronous rod 42. With the cooperation of the roller, the adjusting block 411 is moved to the position of the second through hole 403, so that the roller 412 contacts the branch pipe, clamps and positions the branch pipe, and corrects the branch pipe to the position of the same center as the disc 401, ensuring that the branch pipe corresponds to the main pipe branch. Because the roller 412 is set perpendicular to the disc 401, after the roller 412 positions the branch pipe, the roller 412 can move horizontally, so that the center of the roller 412 always corresponds to the center of the main pipe branch when moving, which facilitates subsequent welding.

[0064] S6: After the branch pipe is positioned, start the heating wire 7 to heat the end of the branch pipe away from the storage box 2, so that the end of the branch pipe is widened, making it easier to insert the branch pipe into the main pipe and facilitate subsequent welding.

[0065] S7: Start the first motor 38. The first motor 38 drives the lead screw 37 to rotate. The rotation of the lead screw 37 drives the slider 34 and the push plate 35 to descend to the position corresponding to the branch pipe. After descending, start the second electric cylinder 33. The second electric cylinder 33 pushes the moving cylinder 3, causing the push plate 35 to move and push the branch pipe, so that the branch pipe moves and is connected to the main pipe branch pipe. The branch pipe moves from the CE section to the DF section, so that the end of the branch pipe away from the storage box 2 corresponds to the welding gun 54.

[0066] S8: After the branch pipe cools down, start the welding gun 54 and the second motor 58. The second motor 58 drives the gear 57 to rotate. The rotation of the gear 57 drives the rack 55 to move. During the movement, the rack 55 drives the outer gear ring 51 to rotate. The rotation of the outer gear ring 51 drives the welding gun 54 to rotate on the outside of the branch pipe, welding the branch pipe and the main pipe together, thus completing the welding work.

[0067] S9: Start the third electric cylinder 67. The third electric cylinder 67 drives the support frame 6 and the main pipe to move away from the welding gun 54. After the movement is completed, rotate the pressure block 64 so that the pressure block 64 corresponds to the third through hole 63, so that the pressure ring 62 is no longer fixed. Rotate the pressure ring 62 to move the pressure ring 62 away from the main pipe, so that the main pipe is no longer obstructed. The welded main pipe can then be removed and a new main pipe can be placed.

[0068] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A method for welding and positioning refrigeration pipes, characterized in that: Includes the following steps: S1: Place the branch pipes into each storage box (2); S2: Place the main pipe into the matching groove (61) of the support frame (6) and fix the main pipe with the pressure ring (62); S3: Start the third electric cylinder (67). The third electric cylinder (67) drives the support frame (6) and the main pipe to move closer to the welding gun (54), so that the main pipe branch moves past the welding gun (54). S4: Start the first electric cylinder (22). The first electric cylinder (22) drives the synchronous plate (24) and the push tube (25) to move. The push tube (25) pushes the lowest branch tube, pushing the branch tube from section AB to section CE, so that the middle part of the branch tube corresponds to the roller (412), and the end of the branch tube away from the storage box (2) corresponds to the heating wire (7). S5: Start the motor (443). The motor (443) drives the hollow turntable (43) to rotate under the cooperation of the first sprocket (44), the second sprocket (441) and the chain (442). The hollow turntable (43) drives the adjusting block (411) and the roller (412) to approach the branch pipe under the cooperation of the spiral groove (432) and the straight groove (422). The roller (412) contacts the branch pipe and corrects it. S6: After the branch pipe is positioned, start the heating wire (7) to heat the end of the branch pipe away from the storage box (2) to make the end of the branch pipe flare. S7: Start the first motor (38), the first motor (38) drives the lead screw (37) to rotate, the lead screw (37) rotates and drives the slider (34) and push plate (35) to descend to the position corresponding to the branch pipe. After descending, start the second electric cylinder (33), the second electric cylinder (33) pushes the moving cylinder (3), so that the push plate (35) moves and pushes the branch pipe, so that the branch pipe moves and is connected to the main pipe branch pipe. The branch pipe moves from the CE section to the DF section, so that the end of the branch pipe away from the storage box (2) corresponds to the welding gun (54). S8: After the branch pipe cools down, start the welding gun (54) and the second motor (58). The second motor (58) drives the gear (57) to rotate. The gear (57) rotates and drives the rack (55) to move. During the movement, the rack (55) drives the outer gear ring (51) and the welding gun (54) to rotate, welding the branch pipe and the main pipe together. S9: Start the third electric cylinder (67). The third electric cylinder (67) drives the support frame (6) and the main pipe to move away from the welding gun (54). After moving, the pressure ring (62) loses its fixation. Rotate the pressure ring (62) to remove the welded main pipe and place a new main pipe.

2. The method for welding and positioning a refrigeration pipe according to claim 1, characterized in that: In step S4, after the bottom branch tube is pushed out, the first electric cylinder (22) drives the synchronous plate (24) and the push tube (25) to move again, so that the push tube (25) moves out of the storage box (2), so that the branch tube in the storage box (2) can fall down and the bottom branch tube corresponds to the first through hole (21), in preparation for the subsequent push of the branch tube.

3. The method for welding and positioning a refrigeration pipe according to claim 1, characterized in that: In step S5, the motor (443) drives the second sprocket (441) to rotate. The second sprocket (441) works with the chain (442) to make the first sprocket (44) rotate. The rotation of the first sprocket (44) drives the hollow turntable (43) to rotate. The rotation of the hollow turntable (43) drives the vortex groove (432) to rotate. During the rotation of the vortex groove (432), it works with the straight groove (422) to make the second slide rod (433) slide in the vortex groove (432). At the same time, it makes the first slide rod (421) slide in the straight groove (422). With the cooperation of the synchronizing rod (42), the first slide rod (421) drives the adjusting block (411) to move towards the position of the second through hole (403), so that the roller (412) contacts the branch pipe, clamps and positions the branch pipe, and corrects the branch pipe to the position of the same center as the disc (401).

4. A refrigeration pipe welding positioning device, applicable to the refrigeration pipe welding positioning method according to any one of claims 1-3, comprising a base plate (1), characterized in that: Above the base plate (1) are arranged in sequence a material storage and discharge unit, a branch pipe feeding unit, a branch pipe positioning unit, a welding unit, and a main pipe positioning and feeding unit; The branch pipe positioning unit includes multiple uniformly arranged fixing plates (4). The upper surface of the fixing plates (4) is connected to symmetrically arranged discs (401). Each disc has a second through hole (403) in the middle. Each disc (401) is connected to three circumferentially arranged second T-shaped slide rails (41) on the side that is close to each other. An adjusting block (411) is slidably connected to the outside of the second T-shaped slide rail (41). A roller (412) is rotatably connected to the end of the adjusting block (411) that is close to the second through hole (403). Each adjacent adjusting block (411) is connected to a synchronizing rod (42) on its side. Both ends of the synchronizing plate (24) are connected to a first sliding rod (421). The disc (401) is provided with a straight groove (422) at the position corresponding to the first sliding rod (421). The first sliding rod (421) is slidably connected in the straight groove (422). A hollow positioning sleeve (431) is provided on the side of the disc (401) near the middle of the base plate (1) away from the roller (412). A hollow turntable (43) is rotatably connected to the outside of the hollow positioning sleeve (431). The end of the first slider (34) near the hollow turntable (43) away from the synchronizing rod (42) is connected to a second sliding rod (433). The hollow turntable (43) is provided with three vortex grooves (432) arranged in a circular array at the position corresponding to the second sliding rod (433).

5. A refrigeration pipe welding positioning device according to claim 4, characterized in that: A first sprocket (44) is connected to the side of the hollow turntable (43) away from the disc (401). The first sprocket (44) is located outside the hollow positioning sleeve (431). A second sprocket (441) is set below the disc (401) at the position corresponding to the first sprocket (44). A chain (442) meshes between the first sprocket (44) and the second sprocket (441). A motor (443) is connected to the upper surface of the fixing plate (4) at the position corresponding to the disc (401). The output end of the motor (443) passes through the disc (401) and is connected to the second sprocket (441).

6. A refrigeration pipe welding positioning device according to claim 4, characterized in that: The material storage and discharging unit includes multiple evenly arranged storage boxes (2). A first through hole (21) is symmetrically arranged below the storage box (2). A support platform (23) is connected above the base plate (1) at a position corresponding to the storage box (2) and away from the middle of the base plate (1). A first electric cylinder (22) is connected to both ends of the upper surface of the support platform (23). A synchronization plate (24) is connected to the output end of the first electric cylinder (22). Multiple evenly arranged push tubes (25) are connected to the side of the synchronization plate (24) near the storage box (2) and at the position corresponding to the through hole.

7. A refrigeration pipe welding positioning device according to claim 4, characterized in that: The branch pipe feeding unit includes symmetrically arranged moving cylinders (3), each of which is rotatably connected to a lead screw (37). A slider (34) is threadedly connected to the outside of the lead screw (37), and a push plate (35) is connected between the sliders (34). The upper end of the lead screw (37) passes through the moving cylinder (3) and is connected to a first motor (38) fixed to the upper surface of the moving cylinder (3). A second electric cylinder (33) is connected to the middle of the moving cylinder (3) near the storage box (2).

8. A refrigeration pipe welding positioning device according to claim 4, characterized in that: Multiple evenly arranged heating wires (7) are connected to the upper surface of the base plate (1) at a position away from the storage box (2) corresponding to the hollow turntable (43).

9. A refrigeration pipe welding positioning device according to claim 4, characterized in that: The welding unit includes multiple uniformly arranged external toothed rings (51), and a welding gun (54) is connected to the inner side of the external toothed rings (51). Hollow positioning disks (5) are symmetrically arranged on the upper surface of the base plate (1) corresponding to the positions on both sides of the external toothed rings (51). A rack (55) is provided below each external toothed ring (51). The external toothed rings (51) mesh with the rack (55). A gear (57) meshes above one end of the rack (55). A second motor (58) is connected to the side of the gear (57) near the storage box (2).

10. A refrigeration pipe welding positioning device according to claim 4, characterized in that: The main pipeline positioning and feeding unit includes a support frame (6), a matching groove (61) is provided on the top of the support frame (6), and pressure rings (62) are rotatably connected at both ends of the support frame (6) away from the outer toothed ring (51). A third through hole (63) is provided at one end of the pressure ring (62) near the outer toothed ring (51). A symmetrically arranged pressure block (64) is rotatably connected on the top of the support frame (6) corresponding to the third through hole (63). A symmetrically arranged third electric cylinder (67) is connected on the side of the support frame (6) away from the outer toothed ring (51).

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