Welding device for production of pipe fitting elbow for evaporator

Abstract

The invention relates to the technical field of welding equipment, and discloses a welding device for evaporator pipe elbow production, which comprises a welding table, an air cylinder arranged on the welding table, a flat plate mounted on a piston rod of the air cylinder, a high-frequency coil arranged at the bottom of the flat plate, a pair of clamping blocks arranged on the welding table and a vertical plate arranged on the welding table, a guide groove is formed in the vertical plate, a guide rod is installed in the guide groove in a sliding mode, a movable plate is arranged at the end, away from the vertical plate, of the guide rod, a tool bit is arranged on the movable plate, a scraping plate is arranged at the bottom end of the movable plate, and the movable plate is in transmission connection with an air cylinder. And the straight pipe connector curled edge is smoothed by the scraper. And the flattened curled part is attached to the elbow, so that after the connecting part of the straight pipe and the elbow is heated by the high-frequency coil, the molten curled part of the straight pipe is fully fused with the elbow, the welding is firmer, and the reliability of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, in particular to a welding device for producing pipe elbows for evaporators. Background Art

[0002] The evaporator is a heat exchange device used to convert liquid into gas. It is widely used in refrigeration, chemical industry, food processing, pharmaceutical and other fields. When processing the evaporator, the copper tube is first cut into multiple straight tubes of equal length, and several elbows are made through a bending process. In order for the elbow to be smoothly installed in the straight tube, the interface of the straight tube must be expanded to increase the inner diameter of the straight tube, and then the elbow is installed in the straight tube. Finally, a high-frequency welding machine is used to heat the connection between the straight tube and the elbow so that the straight tube and the elbow melt and become one.

[0003] After the straight pipe is expanded, the interface of the straight pipe will curl outward, resulting in insufficient contact between the curled portion of the straight pipe and the elbow. In the prior art, the straight pipe and the elbow are directly welded, so that the curled portion of the straight pipe interface cannot be fully fused with the elbow after melting, ultimately resulting in a weak weld. Therefore, this does not meet existing needs. In this regard, we propose a welding device for producing elbows for evaporator pipe fittings. Summary of the invention

[0004] The present invention provides a welding device for producing elbows of pipe fittings for evaporators, which has the advantages of using a knife head to impact the curled part of a straight pipe upward before welding, cutting the curled part, and smoothing the curled part with a scraper to make the curled part of the straight pipe contact with the elbow, and fully fuse the curled part with the elbow after welding, so that the curled part is more firm after welding. It solves the problem mentioned in the above background technology that after the straight pipe is expanded, the interface of the straight pipe will curl outward, resulting in the curled part of the straight pipe and the elbow cannot be fully contacted. In the prior art, the straight pipe and the elbow are directly welded, so that the curled part of the straight pipe interface cannot be fully fused with the elbow after melting, which finally leads to loose welding.

[0005] The present invention provides the following technical solution: a welding device for producing an evaporator pipe elbow, comprising a welding platform, a cylinder is arranged on the welding platform, a high-frequency coil is connected to the piston rod of the cylinder, a pair of clamping blocks are arranged on the welding platform, a vertical plate is arranged on the welding platform, a guide groove is opened on the vertical plate, a guide rod is slidably installed in the guide groove, a movable plate is arranged at one end of the guide rod away from the vertical plate, a cutter head is arranged on the movable plate, and a scraper is arranged at the bottom end of the movable plate; The movable plate is drivingly connected to the cylinder.

[0006] As an optional solution of a welding device for producing elbows of evaporator pipe fittings described in the present invention, a groove is opened on the movable plate, a plurality of the cutter heads are arranged, and the plurality of the cutter heads are evenly distributed in the groove, and the scraper is installed directly below the groove.

[0007] As an optional solution of a welding device for producing an evaporator pipe elbow according to the present invention, wherein: the guide groove includes an impact groove, a return groove and a No. 1 chute, the impact groove, the return groove and the No. 1 chute are connected in sequence, the return groove is hinged with a rotating plate at one end connected to the No. 1 chute, a No. 1 torsion spring is arranged on the rotating plate, one end of the No. 1 torsion spring is connected to the rotating plate, and the other end of the rotating plate is connected to the vertical plate, a No. 2 limit block is also arranged in the return groove, and the No. 2 limit block is in conflict with the rotating plate; When the guide rod moves to the bottom end of the first inclined groove, the cutter head is located directly below the curled portion of the straight pipe. When the guide rod moves into the impact groove, the cutter head impacts and cuts the curled edge of the straight pipe interface.

[0008] As an optional solution of the welding device for producing elbows of pipe fittings for evaporators described in the present invention, wherein: a flat plate is installed on the piston rod of the cylinder, a trigger rod is installed at the bottom of the flat plate, a pressure plate is hinged at the bottom end of the trigger rod, the pressure plate is in contact with the guide rod, a No. 2 torsion spring is hinged on the pressure plate, one end of the No. 2 torsion spring is connected to the pressure plate, and the other end of the No. 2 torsion spring is connected to the trigger rod, a No. 1 limit block is arranged on the trigger rod, and the No. 1 limit block is in contact with the pressure plate; When the pressure plate moves downward, the guide rod moves to the bottom end of the first inclined slot, and when the pressure plate is separated from the guide rod, the guide rod enters the impact slot.

[0009] As an optional solution of the welding device for producing elbows of pipe fittings for evaporators described in the present invention, wherein: an energy storage mechanism is arranged on the side of the vertical plate, and the energy storage mechanism comprises a positioning rod, the positioning rod is installed on the side of the vertical plate, a push plate is slidably installed on the positioning rod, the push plate is located at the bottom of the guide rod, and an energy storage spring is sleeved on the positioning rod, and the other end of the energy storage spring is in contact with the push plate; When the guide rod moves into the impact groove, the push plate drives the cutter head to move upward quickly.

[0010] As an optional solution of a welding device for producing elbows of pipe fittings for evaporators described in the present invention, wherein: a return mechanism is arranged on the welding platform, the return mechanism comprises a fixing plate, the fixing plate is mounted on the welding platform, a slide groove is provided on the fixing plate, a guide block is slidably mounted in the slide groove, a connecting rod is slidably inserted on the guide block, one end of the connecting rod is connected to the guide rod, a mounting plate is mounted on the other end of the connecting rod, a return compression spring is sleeved on the connecting rod, one end of the return compression spring is connected to the mounting plate, and the other end of the return compression spring is connected to the guide block; When the guide rod moves into the return groove, the connecting rod drives the guide rod to reset.

[0011] As an optional solution of a welding device for producing an evaporator pipe elbow according to the present invention, wherein: the impact groove includes a vertical groove and a second inclined groove, and the first inclined groove, the vertical groove, the second inclined groove and the return groove are connected in sequence; When the guide rod moves into the No. 2 chute, the scraper clamps the straight pipe.

[0012] As an optional solution for a welding device for producing elbows of evaporator pipe fittings described in the present invention, wherein: a slide rail is provided on the welding table, a slider is slidably installed in the slide rail, a connecting plate is provided on the side of the slider away from the slide rail, a slide rod is slidably inserted on the connecting plate, the clamping block is fixedly connected to the slide rod, an extrusion spring is sleeved on the slide rod, and the other end of the extrusion spring is in contact with the clamping block.

[0013] As an optional solution of a welding device for producing an evaporator pipe elbow according to the present invention, wherein: a limit plate is installed on the slide rail, a limit hole is provided on the limit plate, an L-shaped rod is slidably inserted on the connecting plate, a clamping block is provided at one end of the L-shaped rod close to the limit plate, a locking compression spring is sleeved on the L-shaped rod, and the other end of the locking compression spring is connected to the connecting plate; When the connected plate moves upward, the clamping block is engaged with the limiting hole.

[0014] As an optional solution of the welding device for producing an evaporator pipe elbow according to the present invention, wherein: an end of the L-shaped rod away from the limiting plate is provided with a resistance block, the resistance block is located directly below the high-frequency coil, and when the high-frequency coil moves downward, the limiting hole and the blocking block are no longer engaged; A buffer spring for reducing the descending speed of the straight pipe is arranged at the bottom of the sliding block.

[0015] The present invention has the following beneficial effects: 1. The welding device for the production of elbows for evaporator pipe fittings, before welding, the cylinder drives the flat plate, the trigger rod, and the pressure plate to move downward. At this time, the pressure plate contacts the guide rod, and the pressure plate drives the guide rod to move downward. The guide rod drives the push plate to move downward. The energy storage spring is compressed by the push plate to store energy. At the same time, the guide rod drives the moving plate, the cutter head and the scraper to move downward. When the guide rod moves to the bottom of the No. 1 inclined slot, the cutter head is located below the curling part of the straight tube. At this time, the guide rod is separated from the pressure plate, and the guide rod enters the vertical slot, and the energy storage spring is released. The energy storage spring drives the guide rod to move up quickly through the push plate, and at the same time, the guide rod drives the movable plate, the cutter head and the scraper to move up quickly. The cutter head cuts the curled part of the straight tube, and the scraper smoothes the cut curled part. The curled part after smoothing fits with the elbow. Therefore, after the high-frequency coil heats the connection between the straight tube and the elbow, the melted curled part of the straight tube is fully fused with the elbow, making the welding more firm, reducing the possibility of leakage during the use of the connection between the straight tube and the elbow, and improving the reliability of the device.

[0016] 2. The welding device for producing elbows of pipe fittings for evaporators, when the guide rod is in the No. 2 inclined groove, the scraper drives the moving plate and the scraper to gradually press the straight pipe, and at the same time drives the straight pipe to move upward. When the straight pipe moves upward, the straight pipe drives the slider to move upward through the clamping block, the sliding rod, and the connecting plate. At the same time, the connecting plate drives the L-shaped rod and the clamping block to move upward, and the clamping block is engaged with the limiting hole. At this time, the high-frequency coil is located below the connection position between the straight pipe and the elbow, and the high-frequency coil is in conflict with the abutment block, and the abutment block drives the L-shaped rod to move away from the limiting plate. At this time, the limiting hole and the clamping block are no longer engaged, and the slider, the connecting plate, the sliding rod, the clamping block and the straight pipe and the elbow move downward under the action of gravity. At the same time, the high-frequency coil heats and welds the straight pipe and the elbow, thereby realizing the welding of the connection point of the straight pipe and the elbow from bottom to top. During welding, the gravity of the molten pool helps gas and impurities to float and be discharged, reduces pores and slag inclusions in the weld, improves the welding quality, and increases the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a structural schematic diagram of the cutter head installation of the present invention.

[0019] Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the guide groove of the present invention.

[0021] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure at point B in the middle.

[0022] Figure 6 It is a schematic diagram of the cross-sectional structure of the pressing plate of the present invention.

[0023] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at C in the middle.

[0024] Figure 8 It is a structural schematic diagram of the return mechanism of the present invention.

[0025] Fig. 9 This is a schematic diagram of the structure of the clamping block installation of the present invention.

[0026] Fig.10 It is a schematic diagram of the cross-sectional structure of the slide rail of the present invention.

[0027] In the figure: 101, welding table; 102, cylinder; 103, high frequency coil; 104, clamping block; 105, flat plate; 2100, energy storage mechanism; 2200, return mechanism; 201, trigger rod; 202, vertical plate; 203, fixed plate; 204, mounting plate; 205, reset spring; 206, No. 1 limit block; 207, pressure plate; 208, push plate; 209, positioning rod; 210, energy storage spring; 211, moving plate; 212, cutter head; 213, scraper; 215, groove; 216, guide rod; 217, connecting rod; 218, guide groove ; 2180, impact groove; 2181, inclined groove No. 1; 2182, vertical groove; 2183, inclined groove No. 2; 2184, return groove; 219, rotating plate; 220, torsion spring No. 1; 221, limit block No. 2; 222, torsion spring No. 2; 223, slide groove; 224, guide block; 301, slide rail; 302, limit plate; 303, slider; 304, connecting plate; 305, buffer spring; 306, extrusion spring; 307, limit hole; 308, slide rod; 309, resistance block; 310, L-shaped rod; 311, clamping block; 312, locking compression spring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0029] Embodiment 1: This embodiment is intended to solve the problem that after the straight pipe is expanded, the interface of the straight pipe will curl outward, resulting in the curled part of the straight pipe not being able to fully contact the elbow. In the prior art, the straight pipe and the elbow are directly welded, so that the curled part of the straight pipe interface cannot be fully fused with the elbow after melting, which ultimately leads to a weak weld. Please refer to Figures 1 to 10 A welding device for producing an evaporator pipe elbow comprises a welding platform 101, a cylinder 102 is arranged on the welding platform 101, a high-frequency coil 103 for heating a pipe is connected to the piston rod of the cylinder 102, a pair of clamping blocks 104 are arranged on the welding platform 101, a vertical plate 202 is arranged on the welding platform 101, a guide groove 218 is opened on the vertical plate 202, a guide rod 216 is slidably installed in the guide groove 218, a movable plate 211 is arranged at one end of the guide rod 216 away from the vertical plate 202, a cutter head 212 is arranged on the movable plate 211, and a cutter head 212 is arranged on the movable plate 211. A scraper 213 is provided at the bottom end, and the movable plate 211 is connected to the cylinder 102 in transmission. Before the high-frequency coil 103 is welded to the elbow, the cutter head 212 impacts and cuts the curled edge of the straight pipe interface, and the scraper 213 smoothes the curled edge of the straight pipe interface. When the straight pipe is expanded, the interface of the straight pipe will curl outward. At this time, if the scraper 213 is directly used to smooth the curled part, the required force is relatively large. Therefore, the cutter head 212 is first used to cut the curled part. Cutting helps to reduce the stress of the curled part, so that only a smaller force is required for smoothing in the later stage.

[0030] It should be noted that in the prior art, a high-frequency current passes through the high-frequency coil 103, and the skin effect is used to concentrate the high-frequency current energy on the surface of the pipe to be welded. The proximity effect is used to control the position and range of the high-frequency current flow path, so that the straight pipe and the elbow interface are heated and melted in a very short time, thereby achieving docking. The specific structure and principle of the high-frequency coil 103 for welding are well known to those skilled in the art and will not be elaborated here.

[0031] Among them, please refer to Figure 2 , Figure 3 A groove 215 is provided on the movable plate 211, and a plurality of cutter heads 212 are arranged, and the plurality of cutter heads 212 are evenly distributed in the groove 215, and the scraper 213 is installed directly below the groove 215. Therefore, when the cutter head 212 is located below the curled part of the straight tube, the cutter head 212 is distributed in a ring around the straight tube. When the cutter head 212 moves upward rapidly, the cutter head 212 cuts the curled part of the straight tube. After cutting, the curled part of the straight tube changes from a ring shape to a petal shape, so the scraper 213 can smooth the curled part with a smaller force.

[0032] Among them, please refer to Figure 4The guide groove 218 includes an impact groove 2180, a return groove 2184 and a No. 1 inclined groove 2181. The impact groove 2180, the return groove 2184 and the No. 1 inclined groove 2181 are connected in sequence. The end of the return groove 2184 connected to the No. 1 inclined groove 2181 is hinged with a rotating plate 219. The rotating plate 219 is provided with a No. 1 torsion spring 220. One end of the No. 1 torsion spring 220 is connected to the rotating plate 219. The other end of the rotating plate 219 is connected to the vertical plate 202. A No. 2 limit block 220 is also provided in the return groove 2184. 21. When the No. 2 limit block 221 conflicts with the rotating plate 219 and the guide rod 216 moves to the bottom end of the No. 1 inclined groove 2181, the cutter head 212 is located directly below the curled portion of the straight tube. When the guide rod 216 moves into the impact groove 2180, the cutter head 212 impacts and cuts the curled edge of the straight tube interface. Under the action of the No. 2 limit block 221, the rotating plate 219 can only deflect in one direction. Under the action of the rotating plate 219, the guide rod 216 can only move in one direction from the return groove 2184 to the No. 1 inclined groove 2181.

[0033] It should be noted that the cutter head 212 is configured as an alloy cutter head. Since the high-frequency coil 103 will heat the metal, in order to avoid the influence of the high-frequency coil 103 on the cutter head 212, the cutter head 212 enters the return groove 2184 after cutting the curled part of the straight tube, and then moves to the connection between the return groove 2184 and the first bevel groove 2181. At this time, the cutter head 212 is located outside the high-frequency coil 103, thereby avoiding the influence of the high-frequency coil 103 on the cutter head 212.

[0034] For details, please refer to Figure 6 , Figure 7 A trigger rod 201 is installed at the bottom of the flat plate 105, and a pressure plate 207 is hinged at the bottom end of the trigger rod 201. The pressure plate 207 is in conflict with the guide rod 216. A No. 2 torsion spring 222 is hinged on the pressure plate 207. One end of the No. 2 torsion spring 222 is connected to the pressure plate 207, and the other end of the No. 2 torsion spring 222 is connected to the trigger rod 201. A No. 1 limit block 206 is provided on the trigger rod 201, and the No. 1 limit block 206 is in conflict with the pressure plate 207. When the pressure plate 207 moves downward, the guide rod 216 moves to the bottom end of the No. 1 inclined groove 2181. When the pressure plate 207 is separated from the guide rod 216, the guide rod 216 enters the impact groove 2180.

[0035] It should be noted that after the pressure plate 207 is separated from the guide rod 216, the guide rod 216 enters the impact groove 2180, and then the guide rod 216 enters the return groove 2184. At this time, the guide rod 216 is located above the pressure plate 207. After welding is completed, the pressure plate 207 moves upward and resets under the drive of the cylinder 102. In order to avoid the guide rod 216 from blocking the reset of the pressure plate 207, the pressure plate 207 is hinged at the bottom of the trigger rod 201. Therefore, when the pressure plate 207 moves upward and resets under the drive of the cylinder 102, the pressure plate 207 conflicts with the guide rod 216 and flips downward. When the pressure plate 207 completes its reset, the pressure plate 207 returns to the top of the guide rod 216 and waits for the next welding.

[0036] Also, please refer to Figure 6 An energy storage mechanism 2100 is arranged on the side of the vertical plate 202, and the energy storage mechanism 2100 includes a positioning rod 209, which is installed on the side of the vertical plate 202. A push plate 208 is slidably installed on the positioning rod 209, and the push plate 208 is located at the bottom of the guide rod 216. An energy storage spring 210 is sleeved on the positioning rod 209, and the other end of the energy storage spring 210 is in contact with the push plate 208. When the guide rod 216 moves to the impact groove 2180, the push plate 208 drives the cutter head 212 to move up quickly.

[0037] Also, please refer to Figure 7 A return mechanism 2200 is provided on the welding platform 101, and the return mechanism 2200 includes a fixed plate 203, which is installed on the welding platform 101. A slide groove 223 is opened on the fixed plate 203, and a guide block 224 is slidably installed in the slide groove 223. A connecting rod 217 is slidably inserted on the guide block 224, one end of the connecting rod 217 is connected to the guide rod 216, and the other end of the connecting rod 217 is installed with the mounting plate 204. A reset compression spring 205 is sleeved on the connecting rod 217, one end of the reset compression spring 205 is connected to the mounting plate 204, and the other end of the reset compression spring 205 is connected to the guide block 224. When the guide rod 216 moves to the return groove 2184, the connecting rod 217 drives the guide rod 216 to reset.

[0038] In this embodiment: before welding begins, the cylinder 102 drives the plate 105, the trigger rod 201, and the pressure plate 207 to move downward. At this time, the pressure plate 207 contacts the guide rod 216, and the pressure plate 207 drives the guide rod 216 to move downward. The guide rod 216 drives the push plate 208 to move downward. The energy storage spring 210 is compressed by the push plate 208 to store energy. At the same time, the guide rod 216 drives the moving plate 211, the cutter head 212 and the scraper 213 to move downward. When the guide rod 216 moves to the bottom end of the first inclined groove 2181, the cutter head 212 is located below the curling part of the straight tube. At this time, the guide rod 216 is separated from the pressure plate 207, and the guide rod 216 enters the vertical groove 2 In 182, the energy storage spring 210 is released, and the energy storage spring 210 drives the guide rod 216 to move up quickly through the push plate 208. At the same time, the guide rod 216 drives the movable plate 211, the cutter head 212 and the scraper 213 to move up quickly. The cutter head 212 cuts the curled part of the straight tube, and the scraper 213 smoothes the cut curled part. The smoothed curled part fits with the elbow. Therefore, after the high-frequency coil 103 heats the connection between the straight tube and the elbow, the melted curled part of the straight tube is fully fused with the elbow, making the welding more firm, reducing the possibility of leakage during use of the connection between the straight tube and the elbow, and improving the reliability of the device.

[0039] Embodiment 2: This embodiment is intended to promote the solution of welding the connection point of the straight pipe and the elbow from bottom to top, which helps the gas and impurities float and discharge under the gravity of the molten pool, reduces the pores and slag inclusions in the weld, and improves the welding quality. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figures 1 to 10 The impact groove 2180 includes a vertical groove 2182 and a second inclined groove 2183. The first inclined groove 2181, the vertical groove 2182, the second inclined groove 2183 and the return groove 2184 are connected in sequence. When the guide rod 216 moves to the second inclined groove 2183, the scraper 213 clamps the straight pipe.

[0040] Please note that, please refer to Figure 4 When the guide rod 216 moves in the vertical groove 2182, the cutter head 212 cuts the curled part of the straight tube, and the scraper 213 smoothes the curled part. When the guide rod 216 is in the second inclined groove 2183, the scraper 213 drives the moving plate 211 and the scraper 213 to gradually press the straight tube, and at the same time drive the straight tube to move upward.

[0041] Also, please refer to Fig. 9 , Fig.10, a slide rail 301 is provided on the welding platform 101, a slider 303 is slidably installed in the slide rail 301, a connecting plate 304 is provided on the side of the slider 303 away from the slide rail 301, a slide rod 308 is slidably inserted on the connecting plate 304, the clamping block 104 is fixedly connected to the slide rod 308, an extrusion spring 306 is sleeved on the slide rod 308, and the other end of the extrusion spring 306 contacts the clamping block 104, a limit plate 302 is installed on the slide rail 301, a limit hole 307 is provided on the limit plate 302, an L-shaped rod 310 is slidably inserted on the connecting plate 304, a clamping block 311 is provided at one end of the L-shaped rod 310 close to the limit plate 302, a locking spring 312 is sleeved on the L-shaped rod 310, and the other end of the locking spring 312 is connected to the connecting plate 304, and when the connected plate 304 moves upward, the clamping block 311 is engaged with the limiting hole 307.

[0042] In addition, a resistance block 309 is provided at one end of the L-shaped rod 310 away from the limit plate 302. The resistance block 309 is located directly below the high-frequency coil 103. When the high-frequency coil 103 moves downward, the limit hole 307 and the block 311 are no longer engaged. A buffer spring 305 is provided at the bottom of the slider 303 to reduce the descending speed of the straight tube.

[0043] In this embodiment: when the guide rod 216 is in the second chute 2183, the scraper 213 drives the moving plate 211 and the scraper 213 to gradually press the straight tube, and at the same time drives the straight tube to move upward. When the straight tube moves upward, the straight tube drives the slider 303 to move upward through the clamping block 104, the slide bar 308, and the connecting plate 304. At the same time, the connecting plate 304 drives the L-shaped rod 310 and the clamping block 311 to move upward, and the clamping block 311 is engaged with the limiting hole 307. At this time, the high-frequency coil 103 is located below the connection position between the straight tube and the elbow, and the high-frequency coil 103 is in contact with the abutment block 307. 09, the resistance block 309 drives the L-shaped rod 310 to move in the direction of the principle limit plate 302. At this time, the limit hole 307 and the clamping block 311 are no longer engaged, and the slider 303, the connecting plate 304, the sliding rod 308, the clamping block 104 and the straight pipe and the elbow move downward under the action of gravity. At the same time, the high-frequency coil 103 heats and welds the straight pipe and the elbow, thereby realizing the welding of the connection point of the straight pipe and the elbow from bottom to top. During welding, the gravity of the molten pool helps the gas and impurities to float up and be discharged, reducing the pores and slag inclusions in the weld and improving the welding quality.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A welding device for producing an evaporator pipe elbow, comprising a welding platform (101), a cylinder (102) being arranged on the welding platform (101), a high-frequency coil (103) being connected to a piston rod of the cylinder (102), and a pair of clamping blocks (104) being arranged on the welding platform (101), characterized in that: The welding platform (101) is provided with a vertical plate (202), the vertical plate (202) is provided with a guide groove (218), a guide rod (216) is slidably installed in the guide groove (218), a movable plate (211) is provided at one end of the guide rod (216) away from the vertical plate (202), a cutter head (212) is provided on the movable plate (211), and a scraper (213) is provided at the bottom end of the movable plate (211); The moving plate (211) is drivingly connected to the cylinder (102).

2. A welding device for producing an evaporator pipe elbow according to claim 1, characterized in that: The movable plate (211) is provided with a groove (215), a plurality of the cutter heads (212) are provided, and the plurality of the cutter heads (212) are evenly distributed in the groove (215), and the scraper (213) is installed directly below the groove (215).

3. A welding device for producing an evaporator pipe elbow according to claim 1, characterized in that: The guide groove (218) comprises an impact groove (2180), a return groove (2184) and a first inclined groove (2181); the impact groove (2180), the return groove (2184) and the first inclined groove (2181) are connected in sequence; one end of the return groove (2184) connected to the first inclined groove (2181) is hingedly connected to a rotating plate (219); a first torsion spring (220) is arranged on the rotating plate (219); one end of the first torsion spring (220) is connected to the rotating plate (219); the other end of the rotating plate (219) is connected to the vertical plate (202); a second limit block (221) is further arranged in the return groove (2184); the second limit block (221) abuts against the rotating plate (219); When the guide rod (216) moves to the bottom end of the first inclined groove (2181), the cutter head (212) is located directly below the curled portion of the straight pipe, and when the guide rod (216) moves into the impact groove (2180), the cutter head (212) impacts and cuts the curled edge of the straight pipe interface.

4. A welding device for producing an evaporator pipe elbow according to claim 3, characterized in that: A plate (105) is mounted on the piston rod of the cylinder (102), a trigger rod (201) is mounted on the bottom of the plate (105), a pressure plate (207) is hingedly connected to the bottom end of the trigger rod (201), the pressure plate (207) abuts against the guide rod (216), a No. 2 torsion spring (222) is hingedly connected to the pressure plate (207), one end of the No. 2 torsion spring (222) is connected to the pressure plate (207), and the other end of the No. 2 torsion spring (222) is connected to the trigger rod (201), a No. 1 limit block (206) is arranged on the trigger rod (201), and the No. 1 limit block (206) abuts against the pressure plate (207); When the pressure plate (207) moves downward, the guide rod (216) moves to the bottom end of the first inclined slot (2181), and when the pressure plate (207) and the guide rod (216) are separated, the guide rod (216) enters the impact slot (2180).

5. A welding device for producing an evaporator pipe elbow according to claim 3, characterized in that: An energy storage mechanism (2100) is arranged on the side of the vertical plate (202), and the energy storage mechanism (2100) comprises a positioning rod (209), the positioning rod (209) is mounted on the side of the vertical plate (202), a push plate (208) is slidably mounted on the positioning rod (209), the push plate (208) is located at the bottom of the guide rod (216), and an energy storage spring (210) is sleeved on the positioning rod (209), and the other end of the energy storage spring (210) is in contact with the push plate (208); When the guide rod (216) moves into the impact groove (2180), the push plate (208) drives the cutter head (212) to move upward quickly.

6. A welding device for producing an evaporator pipe elbow according to claim 3, characterized in that: The soldering station (101) is provided with a return mechanism (2200), the return mechanism (2200) comprising a fixed plate (203), the fixed plate (203) being mounted on the soldering station (101), the fixed plate (203) being provided with a slide groove (223), a guide block (224) being slidably mounted in the slide groove (223), a connecting rod (217) being slidably plugged into the guide block (224), one end of the connecting rod (217) being connected to the guide rod (216), the other end of the connecting rod (217) being mounted with a mounting plate (204), a return compression spring (205) being sleeved on the connecting rod (217), one end of the return compression spring (205) being connected to the mounting plate (204), and the other end of the return compression spring (205) being connected to the guide block (224); When the guide rod (216) moves into the return groove (2184), the connecting rod (217) drives the guide rod (216) to return to its original position.

7. A welding device for producing an evaporator pipe elbow according to claim 3, characterized in that: The impact groove (2180) comprises a vertical groove (2182) and a second inclined groove (2183), and the first inclined groove (2181), the vertical groove (2182), the second inclined groove (2183) and the return groove (2184) are connected in sequence; When the guide rod (216) moves into the second chute (2183), the scraper (213) clamps the straight pipe.

8. The welding device for producing an evaporator pipe elbow according to claim 1, characterized in that: A slide rail (301) is provided on the soldering station (101), a slider (303) is slidably installed in the slide rail (301), a connecting plate (304) is provided on the side of the slider (303) away from the slide rail (301), a slide rod (308) is slidably inserted on the connecting plate (304), the clamping block (104) is fixedly connected to the slide rod (308), and an extrusion spring (306) is sleeved on the slide rod (308), and the other end of the extrusion spring (306) contacts the clamping block (104).

9. A welding device for producing an evaporator pipe elbow according to claim 8, characterized in that: A limit plate (302) is installed on the slide rail (301), a limit hole (307) is provided on the limit plate (302), an L-shaped rod (310) is slidably plugged on the connecting plate (304), a clamping block (311) is provided at one end of the L-shaped rod (310) close to the limit plate (302), a locking compression spring (312) is sleeved on the L-shaped rod (310), and the other end of the locking compression spring (312) is connected to the connecting plate (304); When the connected plate (304) moves upward, the clamping block (311) engages with the limiting hole (307).

10. A welding device for producing an evaporator pipe elbow according to claim 9, characterized in that: An abutment block (309) is provided at one end of the L-shaped rod (310) away from the limiting plate (302), and the abutment block (309) is located directly below the high-frequency coil (103). When the high-frequency coil (103) moves downward, the limiting hole (307) and the clamping block (311) are no longer engaged. A buffer spring (305) for reducing the descending speed of the straight tube is arranged at the bottom of the sliding block (303).

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