Intelligent welding system for refrigeration equipment

Abstract

The invention discloses an intelligent welding system for refrigeration equipment, and relates to the technical field of copper pipe welding. The intelligent welding system for the refrigeration equipment comprises an intelligent high-frequency welding device, and a rotary workbench is arranged on one side of the intelligent high-frequency welding device; the movable seat is arranged on the rotary working table in a sliding mode, two sets of inner and outer sleeves which are coaxially arranged and distributed in the moving direction of the movable seat are arranged on the movable seat, the sleeves can rotate, the rotating directions of the sleeves distributed in the moving direction of the movable seat are opposite, and the rotating directions of the inner and outer sleeves located at the same axial position are opposite. The sleeves and the arc-shaped clamping plates are arranged on the inner side and the outer side of the connecting area of the bent copper pipe and the straight copper pipe, radial elastic supporting of the butt joint portion is achieved, welding thermal deformation is effectively restrained, and meanwhile the inner sleeve, the outer sleeve and the arc-shaped clamping plates are driven to synchronously and reversely rotate, so that pipe sections on the two sides of a welding seam are subjected to reverse torque action; grain refinement and densification of metal in a melting area are realized under the action of dynamic shearing force, and discharge of pores and inclusions is promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of copper pipe welding, in particular to an intelligent welding system for refrigeration equipment. Background Art

[0002] Refrigeration equipment refers to a device that reduces the temperature of a target space or medium and maintains it below the ambient temperature. It mainly includes compressors, condensers and other main components, and is widely used in food preservation, medical refrigeration, air-conditioning systems and other fields.

[0003] The compressor, as the core power source of the refrigeration equipment, is responsible for compressing the low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas, driving the refrigerant to circulate within the system. The copper tube inside the compressor serves as the refrigerant circulation channel, connecting the condenser and evaporator, and assuming the functions of heat exchange and sealing. The common copper tube connection design adopts an "L" shape structure (such as Figure 1 This is achieved by welding straight copper tubes to the ends of bent copper tubes (as shown). This design not only allows for flexible adjustment of refrigerant flow direction but also accommodates the compact space within the equipment. Connections between the copper tubes are typically completed quickly using intelligent high-frequency welding equipment to ensure a secure and leak-proof joint.

[0004] However, the following problems still exist in the welding process of the current bent copper tube and the straight copper tube: 1. Traditional copper tube welding mostly adopts static clamping method, which only fixes the workpiece. During the welding process, the molten pool is in a "free forming" state, lacks external force intervention, and there is no plastic rolling effect when the molten metal cools. The grains grow coarse, the structure is loose, the pores and slag cannot be effectively squeezed out, and the weld density is poor. At the same time, the stress in the heat-affected zone cannot be effectively released, and the brittleness of the joint increases after welding. When subjected to vibration or pressure loads, the mechanical properties of the weld area are insufficient, and microcracks are prone to occur and expand, eventually causing fracture failure.

[0005] 2. In addition, during the high-frequency induction welding process, the connection area of ​​the copper pipe is rapidly heated to a molten state, and the local pipe wall softens. The traditional clamping only provides external fixation. Once subjected to thermal stress or a small external force, the pipe wall is very likely to collapse, bulge or elliptical deformation, seriously affecting the geometric accuracy of the pipeline. Especially in the reducing butt joint structure where the straight copper pipe is inserted into the bent copper pipe, the uneven fitting gap leads to unbalanced force in the molten pool. The superposition of surface tension and thermal shrinkage stress further aggravates the irregular deformation of the weld area, which is prone to form defects such as internal bulge and weld nodule, which not only affects the appearance quality of the weld, but also forms flow resistance and stress concentration points inside the pipeline, reducing the strength and sealing of the joint. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides an intelligent welding system for refrigeration equipment, which solves the problems raised in the background art.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: an intelligent welding system for refrigeration equipment, comprising: an intelligent high-frequency welding device, a rotating worktable is provided on one side of the intelligent high-frequency welding device; a movable seat, the movable seat is slidably arranged on the rotating worktable, and two groups of coaxially arranged inner and outer sleeves distributed along the moving direction of the movable seat are provided thereon, the sleeves can rotate, and the sleeves distributed along the moving direction of the movable seat rotate in opposite directions, and the inner and outer sleeves located at the same axial position rotate in opposite directions; an arc-shaped splint, the arc-shaped splint is arranged on the sleeve and evenly distributed along its circumference, and is used to radially support the connection area between the bent copper tube and the straight copper tube from the inside and outside; a hot shaping plate, the hot shaping plate is arranged on the arc-shaped splint located inside the bent copper tube, and is used to apply pressure to the molten weld during the welding process, smooth the weld nodules in real time and shape them; a pull rod, the pull rod is connected to the hot shaping plate, and is used to pull the hot shaping plate to move, and a side rod is installed at the end of the pull rod.

[0008] Furthermore, the pull rod is located inside the wedge-shaped cylinder, and the wedge-shaped cylinder can actively rotate and drive the pull rod to move along its axial direction through the sliding cooperation between its wedge-shaped surface and the side rod.

[0009] Furthermore, the pull rod is located inside the drum, and a spiral groove is provided on the drum that slides with the side rod. The drum can rotate actively and drive the pull rod to move along its axial direction through the cooperation between the spiral groove and the side rod.

[0010] Furthermore, a slide groove is provided on the arc-shaped splint located inside the bent copper tube, a slide seat is slidably installed in the slide groove, the hot shaping plate is arranged on the outside of the slide seat, and evenly distributed support springs are connected between the hot shaping plate and the slide seat; a pull column that slides through the arc-shaped splint is installed on the side of the slide seat close to the bent copper tube, and each pull column is installed on the same pull ring, and the pull ring is fixedly connected to the pull rod.

[0011] Furthermore, the outer circumference of the sleeve is provided with inner grooves evenly distributed in the circumferential direction, and evenly distributed connecting springs are connected between the arc-shaped splints and the corresponding inner grooves. The sleeve is rotatably mounted on the spiral sleeve and slides with the spiral grooves on the spiral sleeve through the protrusions; the spiral sleeve located inside the bent copper tube is mounted on the rotating shaft, and the spiral sleeve located inside the straight copper tube is mounted on the shaft sleeve arranged on the outside of the rotating shaft. A bevel gear 1 is mounted on the end of the rotating shaft, and a bevel gear 2 is mounted on the end of the shaft sleeve. A bevel gear 3 rotatably mounted on the upper end of the movable seat is engaged between the bevel gear 1 and the bevel gear 2.

[0012] Furthermore, the spiral sleeves located outside the bent copper tube and the straight copper tube are rotatably mounted on a support fixedly connected to the movable seat, and a rotating gear is fixedly mounted on the outer side of the spiral sleeve, and a transmission gear is engaged with one side of the rotating gear, wherein the transmission gear close to the center side of the rotary worktable is mounted on the inner shaft, and the transmission gear on the other side is mounted on the outer shaft sleeved on the outside of the inner shaft; the rotating shaft, sleeve, inner shaft and outer shaft ends are all equipped with pulleys, and the two oppositely arranged pulleys are connected by belt transmission.

[0013] Furthermore, the pull rod is slidably connected to the vertical plate, the vertical plate is installed at the upper end of the movable seat, a fixed block is installed on the side of the vertical plate, a limiting groove is provided on the side of the fixed block close to the side rod, and two triangular blocks distributed up and down are slidably arranged inside the fixed block, the inclined surface of the triangular block faces the side rod, and a spring column is installed at the end away from the upper and lower triangular blocks, which slides with the fixed block.

[0014] Furthermore, a circumferentially evenly distributed fixing frame is installed at the upper end of the rotating workbench, and the fixing frame extends radially along the rotating workbench, and an arc block is slidably installed thereon, and the arc block is provided in two groups, inner and outer, for circumferentially limiting and clamping the bent copper tube; a cross bar slidably connected to the fixing frame is installed on the side away from the inner and outer arc blocks, and a pressure spring is sleeved on the outer side of the cross bar and located between the arc block and the fixing frame.

[0015] Furthermore, a vertical rod is installed on the upper end of the movable seat, and two circumferentially adjacent vertical rods are slidably installed on the same movable slide rod, and the vertical rod slides in cooperation with the movable slide rod. A tilting rod is hinged at the middle part of the upper end of the movable slide rod, and the other end of the tilting rod is hinged on the push plate, and the lower end of the push plate is connected to the push end of the electric push rod.

[0016] Furthermore, a socket is provided at the end of the arc block, and a plug rod that engages with the socket is installed on the side of the upper end of the movable seat close to the arc block; a slider that slides with the rotating workbench is installed in the middle of the lower end of the movable slide rod, and a pressure plate is installed on the side of the slider close to the center of the rotating workbench.

[0017] The present invention has the following beneficial effects: (1) The intelligent welding system of refrigeration equipment realizes radial elastic support of the joint part by setting sleeves and arc-shaped splints inside and outside the connection area of ​​the bent copper tube and the straight copper tube, effectively suppressing the thermal deformation of welding. At the same time, by driving the inner and outer sleeves and arc-shaped splints to rotate synchronously in the opposite direction, the pipe sections on both sides of the weld are subjected to reverse torque. The metal in the molten zone realizes grain refinement and densification under the action of dynamic shear force, which promotes the discharge of pores and inclusions. In addition, a stress balance state of internal and external coordination is formed, which effectively suppresses the thermal deformation during welding, enhances the melting stability between the copper tubes, and further improves the quality of the joint.

[0018] (2) The intelligent welding system for refrigeration equipment sets a movable and rotatable hot shaping plate on the arc-shaped clamping plate inside the bent copper tube. In order to solve the problem of weld nodules or bulges that are easy to occur during the high-frequency welding melting stage due to the difference in tube diameters between straight copper tubes and bent copper tubes caused by interference or transition fit, the hot shaping plate is pre-tightened by the support spring and synchronously fits the weld with the rotating feed action, applying uniform and controllable radial pressure, smoothing the bulges in real time, suppressing metal accumulation, and realizing dynamic plastic finishing of the molten weld, significantly improving the forming quality and density, and effectively ensuring the joint strength and sealing performance.

[0019] (3) The intelligent welding system for refrigeration equipment realizes circumferential clamping and positioning of the bent copper tube by setting an arc block that fits the outer wall of the bent copper tube on the rotating workbench. At the same time, the two straight copper tubes that need to be connected to the bent copper tube can be pushed toward the bent copper tube at the same time to achieve bilateral synchronous docking. In this way, it can ensure that the thrust on both sides is consistent and the action is coordinated, which not only improves the docking efficiency, but also makes the bent copper tube symmetrical in force, avoids eccentric load or deformation caused by unilateral extrusion, and significantly improves the stability of the docking process and the welding positioning accuracy.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the connection between the bent copper tube and the straight copper tube of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 Schematic diagram of the structure of the rotating workbench, the pushing plate, the tilting rod and the moving slide rod in the present invention; Figure 4 Schematic diagram of the structure of the fixing frame and the arc block in the present invention; Figure 5 It is a partial cross-sectional structural schematic diagram of the rotary worktable in the present invention; Figure 6 It is a partial cross-sectional structural diagram of the movable seat, the insertion rod and the arc block in the present invention; Figure 7 It is a partial cross-sectional structural schematic diagram of the movable seat in the present invention; Figure 8 It is a partial cross-sectional structural diagram of the sleeve, spiral sleeve and rotating gear in the present invention; Figure 9 It is a partial cross-sectional structural diagram of a bent copper tube and a straight copper tube in the present invention; Figure 10 Schematic diagram of the structure of the arc-shaped clamping plate and the hot-state shaping plate in the present invention; Figure 11 It is a partial cross-sectional structural diagram of the sleeve, spiral sleeve and arc-shaped splint in the present invention; Figure 12 It is a partial cross-sectional structural diagram of the shaft sleeve, spiral sleeve, rotating shaft and pull rod in the present invention; Figure 13 Schematic diagram of the structure of the wedge-shaped cylinder and the side rods in the first embodiment of the present invention; Figure 14 This is a schematic structural diagram of the rotating drum, side rods and spiral grooves in the second embodiment of the present invention.

[0022] In the figure, 1. intelligent high-frequency welding device; 11. high-frequency welding head; 2. rotating workbench; 21. fixed frame; 211. arc block; 212. cross bar; 213. pressure spring; 22. moving groove; 221. moving seat; 222. vertical bar; 223. moving slide bar; 224. tilting bar; 225. pushing plate; 226. electric push rod; 227. jack; 228. inserting rod; 229. slider; 230. pressing plate; 231. clamping plate; 232. L-shaped hinge plate; 233. moving block; 234. cylinder; 235. sleeve; 236. arc clamping plate; 237. connecting spring; 238. spiral sleeve; 239. spiral groove; 241. Rotating shaft; 242. Bushing; 243. Bevel gear one; 244. Bevel gear two; 245. Bevel gear three; 246. Rotating gear; 247. Transmission gear; 248. Inner shaft; 249. Outer shaft; 250. Pulley; 251. Belt; 252. Driving motor; 253. Clamping ring; 255. Slide; 256. Hot shaping plate; 257. Support spring; 258. Pull column; 259. Pull ring; 260. Rotating column; 261. Pull rod; 262. Vertical plate; 263. Side rod; 264. Wedge-shaped cylinder; 265. Fixed block; 266. Triangular block; 267. Spring column; 268. Rotating cylinder; 269. Spiral through groove. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] The following is based on Figures 1-14The intelligent welding system for refrigeration equipment provided by an embodiment of the present invention is described.

[0026] Example 1, please refer to Figures 1-13 .

[0027] Please refer to Figure 2 and Figure 3 An embodiment of the present invention provides an intelligent welding system for refrigeration equipment, including an intelligent high-frequency welding device 1 and a matching high-frequency welding head 11. The intelligent high-frequency welding device 1 uses high-frequency current to pass through an induction coil to generate eddy currents on the surface of the copper tube, and relies on the copper tube's own resistance to heat, so that the connection part of the bent copper tube and the straight copper tube is quickly heated to the welding temperature, thereby realizing metallurgical bonding between the metals. In addition, since the copper tube assembly to be welded has an "L"-shaped structure, consisting of a bent copper tube and two sections of straight copper tubes, two high-frequency welding heads 11 are symmetrically arranged, corresponding to the connection areas on both sides respectively, and double-station welding can be completed simultaneously to improve efficiency. Moreover, each high-frequency welding head 11 is installed on a multi-axis linkage drive mechanism, which includes a linear module that moves in three directions of X, Y, and Z. It can accurately adjust the position and posture of the welding head under the action of the control signal to ensure that the welding head and the weld maintain the optimal distance and angle.

[0028] Please refer to Figure 2 A rotary worktable 2 is provided on one side of the intelligent high-frequency welding device 1. The rotary worktable 2 is rotatably arranged on the upper end of the fixed seat and is used to carry the copper pipe to be welded. In addition, the rotary worktable 2 can intermittently rotate around its central axis under the drive of an existing driving source (such as a motor), completing the orderly switching of multiple workstations between the welding area and the loading and unloading area, thereby realizing continuous and batch welding operations and improving production efficiency.

[0029] Please refer to Figure 3 and Figure 4 In order to achieve stable fixation of the bent copper tube on the rotating worktable 2, a circumferentially evenly distributed fixing frame 21 is installed on the rotating worktable 2. The fixing frame 21 extends radially along the rotating worktable 2, and an arc block 211 is slidably installed on it. The contour of the arc block 211 matches the outer wall of the bent copper tube to be welded, and is used to circumferentially limit and clamp the bent copper tube.

[0030] In addition, the arc blocks 211 are provided in two groups, inner and outer, corresponding to the inner and outer arc sections of the bent copper tube respectively. A cross bar 212 is installed on the side away from the inner and outer arc blocks 211 and is slidably connected to the corresponding fixing frame 21. A pressure spring 213 is sleeved on the outer side of the cross bar 212 and is located between the arc block 211 and the fixing frame 21. When clamping, the inner and outer arc blocks 211 are first pulled apart manually or synchronously by a mechanism to stretch the pressure spring 213 to form sufficient clamping space. After the bent copper tube is placed in, the pressure spring 213 rebounds and pushes the arc block 211 to reset to the center, thereby realizing elastic clamping of the bent copper tube, which not only adapts to dimensional tolerances but also avoids rigid crushing of the tube.

[0031] In addition, the surface of the arc block 211 is covered with a rubber sleeve, which can not only prevent the surface of the bent copper tube from being scratched during the clamping process, but also increase the friction force, improve the positioning stability, and ensure that the workpiece does not loosen or deviate during the welding process.

[0032] In addition, please refer to Figure 3 and Figure 5 A moving groove 22 is provided on the rotating workbench 2 at the position corresponding to the placement of the straight copper tube. A moving seat 221 is slidably installed in the moving groove 22. The moving seat 221 can move horizontally along the moving groove 22 toward the direction of the bent copper tube, thereby driving the clamped straight copper tube to advance toward the side of the bent copper tube, thereby realizing precise docking between the bent copper tube and the straight copper tube.

[0033] At the same time, there are multiple groups of movable seats 221 on the rotating workbench 2, and each group of movable seats 221 corresponds to a straight copper tube connected to the same bent copper tube. In order to ensure that each straight copper tube is synchronously advanced centripetally and accurately inserted into the end of the bent copper tube to achieve reliable docking, a vertical rod 222 is installed on the upper end of the movable seat 221, and two circumferentially adjacent vertical rods 222 are slidably installed on the same movable slide rod 223, and the vertical rod 222 slides with the movable slide rod 223. The middle part of the upper end of the movable slide rod 223 is hinged with a tilting rod 224, and the other end of the tilting rod 224 is hinged on the pushing plate 225. The lower end of the pushing plate 225 is connected to the pushing end of the electric push rod 226, and the electric push rod 226 is fixedly installed on the upper end of the rotating workbench 2.

[0034] During operation, the electric push rod 226 pushes the pushing plate 225 to move upward, driving the tilting rod 224 hinged to it to swing around the hinge point, so that the tilting rod 224 pulls the moving slide bar 223 to move synchronously inward radially toward the center side of the rotating workbench 2, and the moving slide bar 223 drives the moving seat 221 connected to it to feed synchronously through sliding cooperation with the vertical rod 222, thereby driving the two straight copper tubes to advance toward the direction of the bent copper tube at the same time, realizing bilateral synchronous docking, thereby ensuring that the thrust on both sides is consistent and the action is coordinated, which not only improves the docking efficiency, but also makes the bent copper tube symmetrically stressed, avoids unbalanced load or deformation caused by unilateral extrusion, and significantly improves the stability of the docking process and the welding positioning accuracy.

[0035] Please refer to Figure 4 and Figure 6In order to further improve the stability of the curved block 211 in clamping the bent copper tube, a socket 227 is opened at the end of the curved block 211, and a plug rod 228 is installed on the side of the upper end of the movable seat 221 close to the curved block 211 to plug into the socket 227. When the movable seat 221 drives the straight copper tube to advance toward the bent copper tube side to complete the docking, the plug rod 228 is synchronously inserted into the socket 227 of the curved block 211, thereby realizing mechanical locking of the curved block 211 and effectively preventing it from shaking when vibrating or subjected to force. At the same time, the force applied when the straight copper tubes are docked can be transmitted to the curved block 211 through the movable seat 221 and the plug rod 228, so that the bent copper tube is subjected to more uniform force and the risk of local deformation is reduced.

[0036] Also, please refer to Figure 3 and Figure 5 A slider 229 is installed in the middle of the lower end of the movable slide rod 223, which slides with the rotary workbench 2 to provide stable support and guidance for the movement of the movable slide rod 223. A pressure plate 230 is installed on the side of the slider 229 close to the center of the rotary workbench 2. When the movable slide rod 223 is in place, the pressure plate 230 is synchronously pressed on the upper end surface of the arc block 211 with the slider 229 to achieve the limit above the bent copper tube, further enhance the overall clamping rigidity, and ensure the stability and reliability of the workpiece during welding.

[0037] Please refer to Figure 6 and Figure 7 In order to achieve reliable clamping of the straight copper tube, two clamping plates 231 are provided at the upper end of the movable seat 221 for clamping the outer wall of the middle section of the straight copper tube. The two clamping plates 231 are hinged to the movable seat 221 through the same pin shaft to form a symmetrical opening and closing structure. The lower end of the clamping plate 231 is hinged with an L-shaped hinged plate 232, and the other end of the L-shaped hinged plate 232 is hinged to the movable block 233. The movable block 233 slides up and down and fits inside the movable seat 221. The lower end of the movable block 233 is connected to the piston rod of the cylinder 234, and the cylinder 234 is installed at the lower end of the movable seat 221.

[0038] During operation, the cylinder 234 pulls the moving block 233 downward, driving the L-shaped hinged plates 232 on both sides to retract inward, forcing the clamping plate 231 to rotate inward synchronously around the pin shaft to achieve clamping of the straight copper tube; when loosening, the cylinder 234 pushes the moving block 233 upward to reset, and the L-shaped hinged plates 232 expand outward, causing the clamping plates 231 to open in the opposite direction, completing the loosening.

[0039] Please refer to Figure 8 and Figure 9In order to further improve the stability of the joint area between the straight copper tube and the bent copper tube, two sets of coaxially arranged inner and outer sleeves 235 are provided on the movable seat 221 along its moving direction. During the clamping process of the straight copper tube, it can be inserted between the inner and outer sleeves 235 to achieve preliminary positioning and radial guidance. Among them, the outer sleeve 235 is located around the welding area, avoiding the working range of the high-frequency welding head 11 to avoid interference. The inner sleeve 235 is located in the welding area, and together form an inner and outer covering support for the connection part.

[0040] Please refer to Figure 8 and Figure 12 The outer circumference of the sleeve 235 is provided with inner grooves evenly distributed in the circumference, and an arc-shaped splint 236 is provided in the inner groove. Evenly distributed connecting springs 237 are connected between the arc-shaped splint 236 and the corresponding inner groove. Under the elastic force of the connecting spring 237, the arc-shaped splint 236 opens outward and fits with the inner and outer walls of the straight copper tube or the bent copper tube to achieve elastic contact, thereby providing uniform radial support to the connection area between the bent copper tube and the straight copper tube and its adjacent area, significantly suppressing deformation caused by uneven thermal expansion during welding.

[0041] When the moving seat 221 drives the straight copper tube to feed toward the bent copper tube, the inner and outer sleeves 235 and their arc-shaped clamps 236 close to the center side of the rotating worktable 2 can be synchronously inserted into the straight section of the bent copper tube to achieve internal and external support for the welding area of ​​the bent copper tube.

[0042] In addition, the sleeve 235 can rotate around its own axis, and the two groups of sleeves 235 distributed along the moving direction of the moving seat 221 rotate in opposite directions. At the same axial position, the inner and outer sleeves 235 also rotate in opposite directions. The arc-shaped clamping plate 236 rotates synchronously with its respective sleeves 235. Because it is elastically connected to the sleeve 235 through the connecting spring 237 and maintains flexible contact with the copper tube wall, it can transmit torque during rotation without destroying the clamping stability.

[0043] When the sleeves 235 at different axial positions drive the arc-shaped clamping plate 236 to rotate synchronously in the opposite direction, the straight copper tube and the bent copper tube on both sides of the welding area are respectively subjected to rotational forces in opposite directions. The force is transmitted to the weld area through the tube wall, prompting the metal grains to undergo micro-plastic adjustment in the molten state, which helps to eliminate defects such as pores and inclusions and improve the density of the weld. At the same time, the rotational forces on the inner and outer walls of the copper tube are in opposite directions, forming a coordinated stress balance state inside and outside, effectively suppressing thermal deformation during welding, enhancing the melting stability between the copper tubes, and further improving the quality of the joint.

[0044] Please refer to Figure 8 、 Figure 11 and Figure 12In order to realize the rotational movement of the sleeve 235, the sleeve 235 is rotatably installed on the spiral sleeve 238, and the sleeve 235 slides with the spiral groove 239 on the spiral sleeve 238 through the protrusion. When the spiral sleeve 238 rotates, the spiral groove 239 pushes the protrusion, trying to drive the sleeve 235 to move axially, so that the sleeves 235 located on the front and rear sides of the moving direction have a tendency to move towards each other, and then transmitted to the straight copper tube and the bent copper tube through the arc splint 236, so that the joint area is subjected to a slight axial compression effect, which helps to eliminate the assembly gap and improve the connection stability. In addition, since the axial stroke of the sleeve 235 is limited, significant feed cannot be achieved. Under this condition, the axial movement trend of the spiral sleeve 238 is converted into a rotational drive effect, forcing the sleeve 235 to rotate synchronously with the spiral sleeve 238 around its own axis.

[0045] Please refer to Figures 9-13 In order to realize the synchronous reverse rotation of the spiral sleeve 238 inside the straight copper tube and the bent copper tube, the spiral sleeve 238 inside the bent copper tube is installed on the rotating shaft 241, and the spiral sleeve 238 inside the straight copper tube is installed on the shaft sleeve 242 sleeved on the outside of the rotating shaft 241. At the same time, the spiral sleeve 238 inside the straight copper tube rotates in coordination with the rotating shaft 241 and is not affected by the rotating shaft 241. The rotating shaft 241 and the shaft sleeve 242 are both rotatably installed above the movable seat 221. The rotating shaft 241 and the shaft sleeve 242 are located in the internal space of the straight copper tube as a whole, and will not interfere with the stable clamping of the straight copper tube. They do not interfere with each other during operation. It is equipped with bevel gear 1 243, bevel gear 244 is installed on the end of the sleeve 242, bevel gear 3 245 is meshed between bevel gear 1 243 and bevel gear 2 244, bevel gear 3 245 is rotatably installed above the movable seat 221, when the rotating shaft 241 drives the spiral sleeve 238 located inside the bent copper tube to rotate, bevel gear 1 243 rotates synchronously, and drives bevel gear 3 245 to rotate around its own axis through meshing transmission, because bevel gear 3 245 is also meshed with bevel gear 2 244 at the same time, thereby driving bevel gear 2 244 to rotate in the opposite direction, thereby driving the sleeve 242 and the spiral sleeve 238 thereon to rotate synchronously in the opposite direction of the rotating shaft 241.

[0046] Please refer to Figure 6-Figure 8In order to realize the synchronous reverse rotation of the sleeve 235 located outside the straight copper tube and the bent copper tube, the spiral sleeve 238 located outside the bent copper tube and the straight copper tube is rotatably mounted on a support fixedly connected to the movable seat 221, and a rotating gear 246 is fixedly sleeved on the outer side of the external spiral sleeve 238. A transmission gear 247 is engaged with one side of the rotating gear 246. Among them, the transmission gear 247 close to the center side of the rotating worktable 2 is mounted on the inner shaft 248, and the transmission gear 247 on the other side is mounted on the outer shaft 249 sleeved on the outer side of the inner shaft 248. The inner shaft 248 and the outer shaft 249 are both rotatably mounted on the movable seat. 221, and the two rotate independently without interfering with each other. The ends of the rotating shaft 241, the sleeve 242, the inner shaft 248 and the outer shaft 249 are all equipped with pulleys 250, and the two relatively arranged pulleys 250 are connected by a belt 251. Specifically: the pulley 250 on the inner shaft 248 is connected to the pulley 250 on the rotating shaft 241 through a belt 251, and the pulley 250 on the outer shaft 249 is connected to the pulley 250 on the sleeve 242 through a belt 251. The pulley 250 connected to the inner shaft 248 is connected to the output shaft of the drive motor 252, and the drive motor 252 is installed at the upper end of the movable seat 221.

[0047] During operation, the pulley 250 connected to the inner shaft 248 can be driven to rotate by the driving motor 252, and the power is synchronously transmitted to the rotating shaft 241 through the belt 251, so that the inner shaft 248 and the rotating shaft 241 maintain synchronous rotation in the same direction; at the same time, the inner shaft 248 drives the transmission gear 247 thereon to rotate, driving the rotating gear 246 of the external sleeve 235 on the bent copper tube side to rotate. Similarly, the outer shaft 249 receives the movement of the sleeve 242 through the belt 251, realizes synchronous rotation with the sleeve 242, and drives the rotating gear 246 of the external sleeve 235 on the straight copper tube side to rotate through the transmission gear 247. Since the transmission gear 247 can drive the rotating gear 246 meshing with it to rotate in the opposite direction, the sleeve 235 located outside the bent copper tube and the straight copper tube can realize synchronous reverse rotation.

[0048] In addition, please refer to Figure 6 、 Figure 7 and Figure 9 A tightening ring 253 is provided on the outer side of the shaft sleeve 242 for axially limiting and correcting the position of the end of the straight copper tube. After the straight copper tube passes through the inner and outer sleeves 235 and the clamping plate 231 from the inside to the outside along the radial direction of the rotary worktable 2, its outer end is inserted into the tightening ring 253. The inner diameter of the tightening ring 253 matches the outer diameter of the straight copper tube, which can provide it with stable axial support.

[0049] Please refer to Figures 9-11Since the straight copper tube is inserted into the bent copper tube to form an interference or transition fit, there is a difference in tube diameter between the two. During the high-frequency welding process, after the metal in the connection area melts, it is easy to produce weld nodules or local bulges due to uneven internal pressure, resulting in poor weld formation and affecting the joint strength and sealing. For this reason, a slide groove is provided on the arc-shaped splint 236 located inside the bent copper tube, and a slide seat 255 is slidably installed in the slide groove. A hot shaping plate 256 is provided on the outside of the slide seat 255, and evenly distributed support springs 257 are connected between the hot shaping plate 256 and the slide seat 255.

[0050] In the initial stage of welding, the hot shaping plate 256 is located outside the starting position of the weld and does not touch the welding area to avoid interfering with the heating and melting process of the copper tube. When the welding reaches the melting stage, the slide 255 gradually advances along the slide groove toward the weld area. In the process of the hot shaping plate 256 transitioning from the straight copper tube section to the welding area, if the tube diameter changes or there is a local bulge, it can be withdrawn inward by compressing the support spring 257 to achieve flexible giving way. After entering the molten weld area, under the action of the elastic preload provided by the circumferentially evenly arranged support springs 257, the hot shaping plate 256 automatically adheres to the surface of the molten metal.

[0051] In addition, the hot shaping plate 256 can rotate synchronously with the arc-shaped clamping plate 236, applying uniform and controllable radial pressure to the weld, effectively smoothing weld nodules, inhibiting metal accumulation, promoting the densification of the molten pool, and realizing dynamic plastic finishing under high temperature conditions.

[0052] Please refer to Figure 10 and Figure 11 In order to realize the feeding and shaping of the hot shaping plate 256 during the welding process, a pull column 258 that slides through the arc-shaped clamping plate 236 is installed on the side of the slide 255 close to the bent copper tube. Each pull column 258 is installed on the same pull ring 259. The pull ring 259 is sleeved on the outside of the rotating shaft 241 and slides with it. It is fixedly connected to the rotating column 260 located inside the rotating shaft 241, so that the pull ring 259, the pull column 258 and the rotating column 260 can rotate synchronously with the rotating shaft 241.

[0053] A pull rod 261 rotatably connected to the rotating column 260 is provided inside the rotating shaft 241. The pull rod 261 can move axially along the rotating shaft 241 and is not affected by the rotation of the rotating column 260 and the rotating shaft 241. The pull rod 261 can pull the pull ring 259 to move axially through the rotating column 260. The pull ring 259 drives the slide 255 along the slide groove toward the weld area through the pull column 258, thereby driving the hot shaping plate 256 to gradually enter the molten weld position.

[0054] It should be noted that the sleeve 235, the arc-shaped clamping plate 236, the hot shaping plate 256 and their connected structures are all made of high-temperature resistant and non-stick materials, such as stainless steel or heat-resistant alloys with specially treated surfaces, which have good thermal stability and resistance to molten metal adhesion. During the high-frequency welding process, the structure can not only withstand high-temperature environments without deformation, but also effectively prevent molten copper from adhering to its surface, ensuring that the clamping, support and hot shaping functions are stable and reliable.

[0055] Please refer to Figure 7 、 Figure 9 and Figure 13 In order to realize the axial movement of the pull rod 261, a vertical plate 262 is installed at the upper end of the movable seat 221. The end of the pull rod 261 slides with the vertical plate 262 through a spline. A wedge-shaped cylinder 264 fixedly connected to the bevel gear 243 is also sleeved on the outside of the pull rod 261. A side rod 263 is installed at the end of the pull rod 261. When the wedge-shaped cylinder 264 rotates with the bevel gear 243, its wedge surface continuously pushes the side rod 263, thereby driving the pull rod 261 to move smoothly along the axial direction of the vertical plate 262.

[0056] To ensure that the pull rod 261 is stably positioned after moving into place, a fixing block 265 is installed on the side of the vertical plate 262, and a limiting groove is provided on the side of the fixing block 265 close to the side rod 263. Two triangular blocks 266 distributed up and down are slidingly arranged inside the fixing block 265, and the inclined surface of the triangular block 266 faces the side rod 263. The ends of the upper and lower triangular blocks 266 that are away from each other are installed with spring columns 267 that slide with the fixing block 265. When the pull rod 261 moves to the extreme position, the side rod 263 squeezes the inclined surface of the triangular block 266, pushing the upper and lower triangular blocks 266 to overcome the pulling force of the spring column 267 and slide in the opposite direction. After the side rod 263 enters the limiting groove, the spring column 267 rebounds, driving the triangular blocks 266 to reset toward each other, locking them in the groove to prevent accidental movement of the pull rod 261. When the lock needs to be released, only the two triangular blocks 266 need to be manually pulled outward to make the side rod 263 fall out of the limiting groove.

[0057] During specific operation (when in use), first place multiple bent copper tubes between the arc blocks 211 on the rotating workbench 2, and rely on the pressure spring 213 to achieve elastic clamping of the bent copper tubes. Then, pass the straight copper tubes through the inner and outer sleeves 235 and the clamping plate 231 in the radial direction of the rotating workbench 2 from the inside to the outside, until the end thereof is inserted into the clamping ring 253. At this time, the arc clamping plate 236 supports the straight copper tube inside and outside. Then, the cylinder 234 drives the moving block 233 to move downward, and the L-shaped hinge plate 232 drives the clamping plate 231 to rotate around the pin shaft to achieve reliable external clamping of the straight copper tube. Then, the electric push rod 226 pushes the push plate 225 to move upward, and pulls the movable slide bar 223 through the tilt rod 224, driving the two sets of movable seats 221 to feed synchronously to the side of the bent copper tube, so that the straight copper tube is inserted into the bent copper tube to complete the docking. During this process, the sleeve 235 drives the arc clamping plate 236 to synchronously insert into the straight section of the bent copper tube, and at the same time, the insertion rod 228 is inserted into the socket 227 of the arc block 211, and the pressure plate 230 presses it tightly. The high-frequency welding head 11 is moved to the welding position under the multi-axis drive, and the intelligent high-frequency welding device 1 is started, and the connection points on both sides are heated and fused simultaneously. At the same time, the driving motor 252 drives the inner and outer sleeves 235 and their arc clamping plates 236 to rotate synchronously in the opposite direction through the transmission mechanism, exerting a micro-forging effect on the molten weld. At the same time, the rotating shaft 241 drives the wedge cylinder 264 to rotate, pushing the side rod 263 and the pull rod 261 to move axially, thereby making the hot shaping plate 256 fit the molten weld under the pre-tightening force of the support spring 257, smoothing the weld nodules in real time and suppressing deformation. After the single group of welding is completed, the high-frequency welding head 11 is reset, the rotary workbench 2 rotates intermittently, switches to the next station, and repeats the above actions to achieve continuous welding of multiple groups of copper pipes. After all welding is completed, the cylinder 234 retracts to release the clamping plate 231 from clamping the straight copper pipe, the electric push rod 226 is reset, and the moving seat 221 is driven to retreat as a whole. Because the straight copper pipe and the bent copper pipe have been welded into one (such as Figure 1 As shown), each clamping and supporting structure can be smoothly separated, and finally the arc block 211 is opened to take out the welded copper pipe connector.

[0058] Example 2, please refer to Figure 14 .

[0059] The difference between this embodiment and embodiment 1 is that the pull rod 261 here is located inside the rotating drum 268, the rotating drum 268 is fixedly connected to the bevel gear 243, and a spiral groove 269 is provided on the rotating drum 268, which slides with the side rod 263. When the rotating drum 268 rotates with the bevel gear 243, the pull rod 261 can be driven to move along its axial direction through the cooperation between the spiral groove 269 and the side rod 263.

[0060] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0061] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. Refrigeration equipment intelligent welding system, characterized by: include: An intelligent high-frequency welding device (1), wherein a rotating workbench (2) is provided on one side of the intelligent high-frequency welding device (1); A movable seat (221), wherein the movable seat (221) is slidably disposed on the rotary workbench (2), and is provided with two groups of inner and outer sleeves (235) coaxially arranged and distributed along the moving direction of the movable seat (221), the sleeves (235) being rotatable, and the sleeves (235) distributed along the moving direction of the movable seat (221) rotate in opposite directions, and the inner and outer sleeves (235) located at the same axial position rotate in opposite directions; Arc-shaped clamping plates (236), the arc-shaped clamping plates (236) being arranged on the sleeve (235) and evenly distributed along its circumference, and being used to radially support the connection area between the bent copper tube and the straight copper tube from the inside and outside; A hot shaping plate (256) is provided on the arc-shaped clamping plate (236) located inside the bent copper tube and is used to apply pressure to the molten weld during the welding process, smoothing the weld nodules and shaping them in real time; A pull rod (261) is connected to the hot shaping plate (256) and is used to pull the hot shaping plate (256) to move. A side rod (263) is installed at the end of the pull rod (261).

2. The intelligent welding system for refrigeration equipment according to claim 1, characterized in that: The pull rod (261) is located inside the wedge-shaped cylinder (264). The wedge-shaped cylinder (264) can actively rotate and drive the pull rod (261) to move along its axial direction through the sliding fit between its wedge surface and the side rod (263).

3. The intelligent welding system for refrigeration equipment according to claim 1, characterized in that: The pull rod (261) is located inside the rotating drum (268), and a spiral groove (269) is provided on the rotating drum (268) for sliding cooperation with the side rod (263). The rotating drum (268) can actively rotate and drive the pull rod (261) to move along its axial direction through the cooperation between the spiral groove (269) and the side rod (263).

4. The intelligent welding system for refrigeration equipment according to claim 2 or 3, characterized in that: A sliding groove is provided on the arc-shaped clamping plate (236) located inside the bent copper tube, a sliding seat (255) is slidably installed in the sliding groove, a hot shaping plate (256) is arranged outside the sliding seat (255), and evenly distributed support springs (257) are connected between the hot shaping plate (256) and the sliding seat (255); A pull column (258) slidingly penetrating the arc-shaped clamping plate (236) is installed on one side of the slide seat (255) close to the bent copper tube. Each pull column (258) is installed on the same pull ring (259), and the pull ring (259) is fixedly connected to the pull rod (261).

5. The intelligent welding system for refrigeration equipment according to claim 1, characterized in that: The outer circumference of the sleeve (235) is provided with inner grooves evenly distributed in the circumferential direction, and evenly distributed connecting springs (237) are connected between the arc-shaped clamping plates (236) and the corresponding inner grooves. The sleeve (235) is rotatably mounted on the spiral sleeve (238) and is slidably engaged with the spiral grooves (239) on the spiral sleeve (238) through the protrusions. The spiral sleeve (238) located inside the bent copper tube is installed on the rotating shaft (241), and the spiral sleeve (238) located inside the straight copper tube is installed on the shaft sleeve (242) sleeved on the outside of the rotating shaft (241). A bevel gear 1 (243) is installed at the end of the rotating shaft (241), and a bevel gear 2 (244) is installed at the end of the shaft sleeve (242). A bevel gear 3 (245) rotatably installed on the upper end of the movable seat (221) is meshed between the bevel gear 1 (243) and the bevel gear 2 (244).

6. The intelligent welding system for refrigeration equipment according to claim 5, characterized in that: The spiral sleeves (238) located outside the bent copper tube and the straight copper tube are both rotatably mounted on a support fixedly connected to the movable seat (221), and a rotating gear (246) is fixedly mounted on the outer side of the external spiral sleeve (238), and a transmission gear (247) is meshed with one side of the rotating gear (246), wherein the transmission gear (247) close to the center side of the rotary worktable (2) is mounted on the inner shaft (248), and the transmission gear (247) on the other side is mounted on the outer shaft (249) sleeved on the outer side of the inner shaft (248); The ends of the rotating shaft (241), the shaft sleeve (242), the inner shaft (248) and the outer shaft (249) are all equipped with pulleys (250), and the two pulleys (250) arranged opposite to each other are connected by a belt (251).

7. The intelligent welding system for refrigeration equipment according to claim 4, characterized in that: The pull rod (261) is slidably connected to the vertical plate (262), and the vertical plate (262) is installed on the upper end of the movable seat (221). A fixed block (265) is installed on the side of the vertical plate (262), and a limiting groove is provided on the side of the fixed block (265) close to the side rod (263). Two triangular blocks (266) distributed up and down are slidably provided inside the fixed block (265), and the inclined surface of the triangular block (266) faces the side rod (263). A spring column (267) that slidably cooperates with the fixed block (265) is installed at the end away from the upper and lower triangular blocks (266).

8. The intelligent welding system for refrigeration equipment according to claim 1, characterized in that: A circumferentially evenly distributed fixing frame (21) is installed on the upper end of the rotating workbench (2), and the fixing frame (21) extends radially along the rotating workbench (2). An arc block (211) is slidably mounted on the fixing frame. The arc block (211) is provided in two groups, inner and outer, for circumferentially limiting and clamping the bent copper tube. A cross bar (212) slidably connected to the fixing frame (21) is installed on the side away from the inner and outer arc blocks (211), and a pressure spring (213) located between the arc block (211) and the fixing frame (21) is sleeved on the outer side of the cross bar (212).

9. The intelligent welding system for refrigeration equipment according to claim 1, characterized in that: A vertical rod (222) is installed at the upper end of the movable seat (221), and two circumferentially adjacent vertical rods (222) are slidably installed on the same movable slide rod (223), and the vertical rod (222) and the movable slide rod (223) are slidably matched. A tilting rod (224) is hinged at the middle of the upper end of the movable slide rod (223), and the other end of the tilting rod (224) is hinged on the pushing plate (225). The lower end of the pushing plate (225) is connected to the pushing end of the electric push rod (226).

10. The intelligent welding system for refrigeration equipment according to claim 9, characterized in that: The end of the arc block (211) is provided with a socket (227), and a plug rod (228) is installed on the side of the upper end of the movable seat (221) close to the arc block (211) and is plugged into the socket (227); A slider (229) that is slidably engaged with the rotary table (2) is installed at the middle of the lower end of the movable slide rod (223), and a pressure plate (230) is installed on one side of the slider (229) close to the center of the rotary table (2).

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