Welding device for surfacing of copper-nickel alloy pipe fittings and welding method thereof

Abstract

The invention relates to the technical field of surfacing equipment, and discloses a welding device for surfacing of copper-nickel alloy pipe fittings and a welding method.The welding device for surfacing of the copper-nickel alloy pipe fittings comprises a position changing machine, an electric sliding block is arranged on the position changing machine, and a welding gun is arranged at the bottom of the electric sliding block; a welding flux barrel used for storing welding flux is arranged at the bottom of the electric sliding block, a discharging port is formed in the bottom of the welding flux barrel, a flat plate is installed at the bottom of the electric sliding block, rolling wheels are arranged at the bottom of the flat plate and make rolling contact with the alloy pipe, a guide rod is installed at the bottom of the flat plate, a first sliding block is slidably arranged on the guide rod, and an L-shaped rod is installed on the side portion of the first sliding block. A vertical rod is installed in the middle of the L-shaped rod. The first sliding block drives the vertical rod to move up and down in a reciprocating mode through the L-shaped rod, the welding flux in the discharging port is pounded out, the welding flux is prevented from blocking the discharging port, discharging of the welding flux in the discharging port is more uniform, the welding flux can fully cover the welding wire, the welding wire is prevented from making contact with air, it is guaranteed that a welding seam is smooth, and the reliability of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cladding equipment, in particular to a welding device and a welding method for cladding copper-nickel alloy pipe fittings. Background Art

[0002] Surfacing is a process that forms a welding layer with specific properties on the surface of a workpiece by depositing welding materials. Its main purpose is to improve the wear resistance, corrosion resistance, heat resistance and other properties of the workpiece, or to repair the worn and damaged surface of the workpiece. Among them, submerged arc surfacing has the advantage of high efficiency and is suitable for large-area surfacing. When using submerged arc surfacing, the welding wire should be covered with flux to achieve the purpose of protecting the weld.

[0003] The existing cladding equipment needs to perform multiple welding passes during cladding. In order to reduce the number of times the flux is replenished, a sufficient amount of flux is often stored in the flux hopper. However, due to the large amount of flux stored, the flux will be blocked at the discharge port when it leaks out of the hopper, resulting in uneven flux feeding, which makes part of the welding wire exposed to the air during welding, resulting in uneven oxidation of the weld. Therefore, it does not meet the existing needs. In this regard, we propose a welding device and a welding method for cladding copper-nickel alloy pipe fittings. Summary of the invention

[0004] The present invention provides a welding device and a welding method for surfacing copper-nickel alloy pipe fittings. The device and a welding method are provided with a vertical rod that continuously and reciprocally penetrates a discharge port during welding to prevent the flux from clogging at the discharge port when leaking out of the hopper, so that the flux is discharged more evenly, and the welding wire is ensured to be fully covered by the flux during welding, thereby ensuring the beneficial effect of smooth welds. The device solves the problem that multiple welding passes are required during surfacing as mentioned in the above background technology. In order to reduce the number of times the flux is replenished, a sufficient amount of flux is often stored in the flux hopper. However, due to the large amount of flux stored, the flux will be blocked at the discharge port when leaking out of the hopper, resulting in uneven flux discharge, so that part of the welding wire is exposed to the air during welding, resulting in the problem that the weld is oxidized and not smooth.

[0005] The present invention provides the following technical solutions: a welding device and a welding method for surfacing copper-nickel alloy pipe fittings, comprising a positioner, an electric slider is arranged on the positioner, a welding gun is arranged at the bottom of the electric slider, a flux barrel for storing flux is arranged at the bottom of the electric slider, a discharge port is arranged at the bottom of the flux barrel, a flat plate is installed at the bottom of the electric slider, a rolling wheel is arranged at the bottom of the flat plate, the rolling wheel is in rolling contact with the alloy pipe, a guide rod is installed at the bottom of the flat plate, a No. 1 slider is slidably arranged on the guide rod, an L-shaped rod is installed on the side of the No. 1 slider, a vertical rod is installed in the middle of the L-shaped rod, and the vertical rod is located directly above the discharge port; The first sliding block is transmission-connected with the rolling wheel, and during welding, the vertical rod reciprocates through the discharge port.

[0006] As an optional solution of a welding device and a welding method for surfacing copper-nickel alloy pipe fittings described in the present invention, a No. 1 roller is installed on the side of the rolling wheel, a No. 2 roller is installed on the bottom of the flat plate, the No. 1 roller and the No. 2 roller are both configured as rollers with grooves, and belts are installed in the grooves of the No. 1 roller and the No. 2 roller, a rocker is installed on the side of the No. 2 roller, a swing rod is hinged to the other end of the rocker, and the swing rod is hinged to the No. 1 slider.

[0007] As an optional solution of a welding device and a welding method for surfacing copper-nickel alloy pipe fittings described in the present invention, wherein: an L-shaped plate is arranged at the bottom of the flat plate, a pressure rod is slidably mounted on the L-shaped plate, the rolling wheel is rotatably mounted on the bottom end of the pressure rod, a No. 1 tension spring is sleeved on the pressure rod, and the other end of the No. 1 tension spring is fixedly connected to the L-shaped plate; A lifting rod is installed at the top end of the pressure rod, and a guide plate is arranged at the side of the positioner, and the guide plate is arranged to be a trapezoidal plate in cross section.

[0008] As an optional solution for a welding device and a welding method for surfacing copper-nickel alloy pipe fittings described in the present invention, a fixed plate is installed at the bottom end of the vertical rod, a shift plate is hinged at the bottom end of the fixed plate, a No. 1 torsion spring is arranged at one end of the shift plate, the other end of the No. 1 torsion spring is fixedly connected to the fixed plate, a pull rope is installed at the bottom end of the shift plate, and the pull rope is transmission-connected to the L-shaped rod.

[0009] As an optional solution of a welding device and a welding method for surfacing copper-nickel alloy pipe fittings described in the present invention, wherein: an active rack is arranged on the L-shaped rod, a No. 1 vertical plate is installed at the bottom end of the flat plate, a rotating shaft is rotatably installed on the side of the No. 1 vertical plate, a driving gear for meshing with the active rack is arranged on the rotating shaft, a transmission gear is installed on the side of the driving gear, and a driven gear for meshing with the transmission gear is rotatably installed on the No. 1 vertical plate; A slide groove is provided at the bottom of the flat plate, a No. 2 slider is slidably installed in the slide groove, a driven rack is installed at the bottom of the No. 2 slider, the driven rack is meshed with the No. 1 vertical plate, and the No. 2 slider is fixedly connected to the pull rope.

[0010] As an optional solution for a welding device and a welding method for surfacing copper-nickel alloy pipe fittings described in the present invention, a knocking mechanism is arranged at the bottom of the fixed shaft, and the knocking mechanism includes a fixed shaft, and the fixed shaft is fixedly installed at the bottom of the flat plate, and a rotating plate is hinged on the fixed shaft, and a plurality of knocking rods are arranged at the bottom of the rotating plate, and a No. 2 torsion spring is arranged on the rotating plate, and the other end of the No. 2 torsion spring is fixedly connected to the fixed shaft, and the rotating plate is transmission-connected to the No. 2 roller.

[0011] As an optional solution of a welding device and a welding method for surfacing copper-nickel alloy pipe fittings described in the present invention, wherein: a second vertical plate is installed at the bottom of the flat plate, a rotating rod is rotatably installed on the second vertical plate, the second roller is installed on the rotating rod, a rotating sleeve is installed on the side of the second vertical plate close to the second roller, a plurality of abutting rods are arranged on the rotating sleeve, the abutting rods abut against the rotating plate, a connecting sleeve is rotatably installed on the side of the second roller away from the rotating sleeve, and the connecting sleeve is fixedly connected to the rocker; A No. 1 ratchet is arranged inside the rotating sleeve, a No. 2 ratchet is arranged inside the connecting sleeve, a No. 1 pawl for engaging with the No. 1 ratchet is hinged on the rotating rod, and a No. 2 pawl for engaging with the No. 2 ratchet is hinged on the rotating rod.

[0012] As an optional solution of a welding device and a welding method for surfacing copper-nickel alloy pipe fittings according to the present invention, wherein: a No. 1 airbag is installed on the side of the L-shaped plate, a No. 2 airbag is arranged on the side of the dial plate, a hose is connected between the No. 2 airbag and the No. 1 airbag, a pressure plate is installed at one end of the No. 1 airbag, and a crossbar is installed on the pressure plate; A spring is arranged on the rotating shaft, one end of the spring is connected to the rotating shaft, and the other end of the spring is connected to the driving gear.

[0013] As an optional solution of a welding device and a welding method for surfacing copper-nickel alloy pipe fittings described in the present invention, wherein: a sleeve is installed on the electric slider, a wedge bar is slidably installed in the sleeve, the inclined surface of the wedge bar abuts against the pressure plate, a compression spring is arranged in the sleeve, and the other end of the compression spring abuts against the wedge bar; An unlocking rod is slidably installed on the electric slider, a wedge block is installed on one end of the unlocking rod, a wedge groove is opened on the wedge bar, and the wedge groove is arranged corresponding to the wedge block. A No. 2 tension spring is sleeved on the unlocking rod, and the other end of the No. 2 tension spring is fixedly connected to the electric slider.

[0014] The present invention also proposes a welding method for surfacing copper-nickel alloy pipe fittings, comprising the following specific steps: S1. Preparation before welding: install the alloy tube on the positioner, ensure the normal operation of the welding equipment, clean the area to be welded, and remove impurities such as oil, rust, etc. S2. Overlay welding operation: multi-layer and multi-pass welding is adopted, and the thickness of each layer is controlled at 2-4mm. The vertical rod is used to continuously pass through the discharge port to prevent the discharge port from being blocked. After each layer is welded, the discharge port is blocked and the welding slag and spatter are cleaned; S3. Post-weld treatment: Keep warm for a while after welding, cool slowly to reduce stress, check whether there are defects such as cracks and pores on the weld surface, grind and polish the weld to ensure a smooth surface.

[0015] The present invention has the following beneficial effects:

[0016] 1. The welding device and welding method for surfacing copper-nickel alloy pipe fittings, during welding, the rolling wheel rolls along the surface of the pipe, and the rolling wheel drives the swing bar to make a circular motion through the No. 1 roller, the belt and the No. 2 roller. At this time, the No. 1 slider arranged at the other end of the swing bar moves back and forth up and down with the swing bar. Furthermore, the No. 1 slider drives the vertical bar to move back and forth up and down through the L-shaped rod, and the flux in the discharge port is pounded out to prevent the flux from clogging the discharge port, so that the discharge of the flux from the discharge port is more uniform, and the flux can fully cover the welding wire to prevent the welding wire from contacting with the air, thereby ensuring a smooth weld and improving the reliability of the device.

[0017] 2. The welding device and welding method for surfacing copper-nickel alloy pipe fittings are provided with a paddle at the bottom of the vertical rod. When the vertical rod moves downward, the paddle will pound out the flux in the discharge port. When the vertical rod moves upward, the active rack drives the active gear to rotate by meshing with the active gear, and further drives the driven gear to rotate by meshing with the transmission gear and the driven gear. The rotation of the driven gear will cause the driven rack to move along the direction of rotation of the paddle. When the driven rack drives the No. 2 slider to move, the pull rope installed on the side of the No. 2 slider pulls the paddle to rotate the paddle. When the paddle rotates, the flux gathered above the discharge port will be pushed away to prevent the flux from being squeezed and accumulated laterally above the discharge port, which is beneficial to ensure smooth discharge of the discharge port, making the discharge of the discharge port more stable, and further improving the reliability of the device.

[0018] 3. The welding device and welding method for surfacing copper-nickel alloy pipe fittings, after one welding, the rolling wheel rolls in the opposite direction along the pipe, and the No. 2 roller rotates in the opposite direction through the transmission of the No. 1 roller and the belt. At this time, the No. 1 ratchet inside the rotating sleeve is engaged with the No. 1 pawl, so that the No. 2 roller drives the rotating sleeve to rotate, and the abutment rod arranged on the rotating sleeve abuts against the rotating plate. Further, through the cooperation of the No. 2 torsion spring, the rotating plate swings repeatedly, and the knocking rod arranged at the bottom of the rotating plate knocks off the flux agglomerates on the pipe, thereby reducing manpower operation and improving the practicality of the device; Moreover, after one welding pass, the horizontal bar on the side of the No. 1 airbag collides with the positioner, the No. 1 airbag contracts and discharges the gas through the hose into the No. 2 airbag. After the No. 2 airbag expands, it blocks the discharge port to prevent the flux from falling from the discharge port and causing loss when the flux agglomerates are knocked off, thereby further increasing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the flux barrel of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the rolling wheel installation of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the installation of the dial plate of the present invention.

[0023] Figure 5 It is a comparative schematic diagram of the change of the position of the paddle of the present invention.

[0024] Figure 6 It is a schematic diagram of the cross-sectional structure of the rotating plate of the present invention.

[0025] Figure 7 It is a schematic diagram of the cross-sectional structure of the No. 2 roller of the present invention.

[0026] Figure 8 It is a schematic diagram of the cross-sectional structure of the wedge-shaped strip of the present invention.

[0027] Fig. 9 It is a schematic diagram of the cross-sectional structure of the paddle of the present invention.

[0028] Fig.10 It is a schematic diagram of the structure of the No. 2 airbag blocking the discharge port of the present invention.

[0029] Fig.11 It is a structural schematic diagram of the pressure rod of the present invention.

[0030] Fig.12 For the present invention Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0031] Fig.13 For the present invention Figure 5 Schematic diagram of the enlarged structure at point B in the middle.

[0032] In the figure: 101, positioner; 102, electric slider; 103, flux barrel; 104, discharge port; 105, welding gun; 201, plate; 202, rolling wheel; 203, roller No. 1; 204, belt; 205, roller No. 2; 206, L-shaped plate; 207, pressure rod; 208, vertical rod; 209, L-shaped rod; 210, guide plate; 211, lifting rod; 212, tension spring No. 1; 213, guide rod; 214, slider No. 1; 215, swing rod; 216, rocker; 217, vertical plate No. 2; 301, slide; 302, slider No. 2; 303, vertical plate No. 1; 304, transmission gear; 305, dial plate; 306, torsion spring No. 1; 307, fixed plate; 308, active rack; 309 , airbag No. 2; 310, pull rope; 311, driven rack; 312, driven gear; 313, driving gear; 314, rotating shaft; 315, spring; 4100, striking mechanism; 402, fixed shaft; 403, rotating plate; 404, striking rod; 405, unlocking rod; 406, tension spring No. 2; 407, sleeve; 408, wedge strip; 409, airbag No. 1; 410, pressure plate; 411, cross bar; 412, rotating sleeve; 413, connecting sleeve; 414, resistance rod; 415, wedge block; 416, hose; 417, rotating rod; 418, ratchet No. 1; 420, torsion spring No. 2; 419, pawl No. 1; 421, ratchet No. 2; 422, pawl No. 2; 423, wedge groove; 425, compression spring. DETAILED DESCRIPTION

[0033] 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.

[0034] Embodiment 1: This embodiment is intended to solve the problem that multiple passes of welding are required during cladding. In order to reduce the number of times of replenishing flux, sufficient flux is often stored in the flux hopper. However, due to the large amount of flux stored, the flux will be blocked at the discharge port when it leaks out of the hopper, resulting in uneven flux feeding, which makes part of the welding wire exposed to the air during welding, resulting in the problem of uneven oxidation of the weld. Please refer to Figures 1 to 13A welding device for surfacing copper-nickel alloy pipe fittings includes a positioner 101, an electric slider 102 is arranged on the positioner 101, a welding gun 105 is arranged at the bottom of the electric slider 102, a flux barrel 103 for storing flux is arranged at the bottom of the electric slider 102, a discharge port 104 is arranged at the bottom of the flux barrel 103, a flat plate 201 is installed at the bottom of the electric slider 102, a rolling wheel 202 is arranged at the bottom of the flat plate 201, the rolling wheel 202 is in rolling contact with the alloy pipe to be welded, a guide rod 213 is installed at the bottom of the flat plate 201, a slider No. 1 214 is slidably arranged on the guide rod 213, and an L-shaped rod 209 is installed on the side of the slider No. 1 214. A vertical rod 208 is installed in the middle of the L-shaped rod 209, and the vertical rod 208 is located just above the discharge port 104. The first slider 214 is transmission-connected to the rolling wheel 202. During welding, the vertical rod 208 reciprocates through the discharge port 104 to pound out the flux in the discharge port 104 to prevent the flux from clogging the discharge port 104.

[0035] It should be noted that when flux is added to the surface of the alloy tube, a small amount of flux will fall off. Since the unmelted flux can be reused, in the prior art, there is a hopper for collecting the flux under the alloy tube. The fallen flux collected by the hopper can be added back to the flux barrel 103 after filtering and screening.

[0036] For details, please refer to Figure 3 A No. 1 roller 203 is installed on the side of the rolling wheel 202, and a No. 2 roller 205 is rotatably installed on the bottom of the flat plate 201. The No. 1 roller 203 and the No. 2 roller 205 are both configured as rollers with grooves, and belts 204 are installed in the grooves of the No. 1 roller 203 and the No. 2 roller 205. A rocker 216 is installed on the side of the No. 2 roller 205, and a swing rod 215 is hinged to the other end of the rocker 216. The swing rod 215 is hinged to the No. 1 slider 214.

[0037] It should be noted that as the rolling wheel 202 rolls along the surface of the alloy tube, the rolling wheel 202 drives the No. 1 roller 203 and the No. 2 roller 205 to rotate. When the No. 2 roller 205 rotates, the rocker 216 makes a circular motion with the No. 2 roller 205. The swing arm 215 installed at one end of the rocker 216 swings back and forth with the rocker 216. The No. 1 slider 214 set at the other end of the swing arm 215 moves back and forth up and down with the swing arm 215. Furthermore, the No. 1 slider 214 drives the vertical rod 208 to reciprocate up and down through the L-shaped rod 209, so as to pound out the flux in the discharge port 104 to prevent the flux from clogging the discharge port 104.

[0038] In addition, an L-shaped plate 206 is provided at the bottom of the flat plate 201, a pressure rod 207 is slidably mounted on the L-shaped plate 206, and the rolling wheel 202 is rotatably mounted on the bottom end of the pressure rod 207. A tension spring 212 is sleeved on the pressure rod 207, and the other end of the tension spring 212 is fixedly connected to the L-shaped plate 206. Please refer to Fig.11 A lifting rod 211 is installed at the top of the pressure rod 207, and a guide plate 210 is arranged on the side of the positioner 101. The guide plate 210 is arranged to have a trapezoidal cross-section.

[0039] It should be noted that a pair of rolling wheels 202 are provided, and the pair of rolling wheels 202 are respectively provided on both sides of the flat plate 201, and the spacing between the rolling wheel 202 and the welding gun 105 is not less than 30 cm, so as to ensure that the weld at the bottom of the rolling wheel 202 has been completely cooled. Since the surfacing process requires multiple welding passes, the thickness of the metal pipe will change. The design of the No. 1 tension spring 212 can make the rolling wheel 202 fit the pipe better. In addition, when the welding gun 105 welds the two ends of the metal pipe, one of the rolling wheels 202 will be separated from the pipe surface and suspended in the air. At this time, the lifting rod 211 provided at the top of the pressure rod 207 will slide upward along the bevel of the guide plate 210, thereby lifting the rolling wheel 202, and the lifting height of the rolling wheel 202 is less than the groove depth of the No. 1 roller 203 (to prevent the belt 204 from being separated from the No. 1 roller 203 or the No. 2 roller 205), so that when the subsequent rolling wheel 202 moves to the pipe surface again, the rolling wheel 202 will not be stuck by the edge of the pipe.

[0040] This embodiment also provides a welding method for surfacing copper-nickel alloy pipe fittings, comprising the following specific steps: S1. Preparation before welding: install the alloy tube on the positioner 101, ensure the normal operation of welding equipment such as welding machine, wire feeder, protective gas device, etc., clean the area to be welded, and remove impurities such as oil, rust, etc.; S2, surfacing operation: multi-layer multi-pass welding is adopted, and the thickness of each layer is controlled at 2-4 mm. The vertical rod 208 is used to continuously pass through the discharge port 104 to prevent the discharge port 104 from being blocked. After each layer is welded, the discharge port 104 is blocked and the welding slag and spatter are cleaned; S3. Post-weld treatment: Keep warm for a while after welding, cool slowly to reduce stress, check whether there are defects such as cracks and pores on the weld surface, grind and polish the weld to ensure a smooth surface.

[0041] In this embodiment: during welding, the rolling wheel 202 rolls along the surface of the pipe, and the rolling wheel 202 drives the rocker 216 to make a circular motion through the No. 1 roller 203, the belt 204 and the No. 2 roller 205. At this time, the No. 1 slider 214 arranged at the other end of the swing rod 215 moves back and forth up and down with the swing rod 215. Furthermore, the No. 1 slider 214 drives the vertical rod 208 to reciprocate up and down through the L-shaped rod 209, and the flux in the discharge port 104 is pounded out to prevent the flux from clogging the discharge port 104, so that the flux discharge from the discharge port 104 is more uniform, and the flux can fully cover the welding wire to prevent the welding wire from contacting with the air, thereby ensuring a smooth weld and improving the reliability of the device.

[0042] Embodiment 2: This embodiment is intended to promote the solution of the problem of lateral extrusion and accumulation of flux above the discharge port. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figures 1 to 13 A fixed plate 307 is installed at the bottom end of the vertical rod 208, and a dial plate 305 is hinged at the bottom end of the fixed plate 307. A No. 1 torsion spring 306 is provided at one end of the dial plate 305, and the other end of the No. 1 torsion spring 306 is fixedly connected to the fixed plate 307. A pull rope 310 is installed at the bottom end of the dial plate 305, and the pull rope 310 is transmission-connected to the L-shaped rod 209.

[0043] For details, please refer to Figure 4 A driving rack 308 is provided on the L-shaped rod 209, a vertical plate 303 No. 1 is installed at the bottom end of the flat plate 201, a rotating shaft 314 is rotatably installed on the side of the vertical plate 303 No. 1, a driving gear 313 for meshing with the driving rack 308 is provided on the rotating shaft 314, a transmission gear 304 is installed on the side of the driving gear 313, a driven gear 312 for meshing with the transmission gear 304 is rotatably installed on the vertical plate 303 No. 1, a slide groove 301 is provided at the bottom of the flat plate 201, a slider 302 No. 2 is slidably installed in the slide groove 301, a driven rack 311 is installed at the bottom of the slider 302, the driven rack 311 is meshed with the vertical plate 303 No. 1, and the slider 302 No. 2 is fixedly connected to the pull rope 310.

[0044] Specifically, when the vertical rod 208 and the L-shaped rod 209 move upward, the active rack 308 drives the active gear 313 to rotate by meshing with the active gear 313, and further drives the driven gear 312 to rotate by meshing with the transmission gear 304 and the driven gear 312. The rotation of the driven gear 312 will cause the driven rack 311 to move along the direction of rotation of the paddle plate 305. When the driven rack 311 drives the second slider 302 to move, the pull rope 310 installed on the side of the second slider 302 pulls the paddle plate 305 to rotate. When the paddle plate 305 rotates, the flux gathered above the discharge port 104 will be pushed away. It should be noted that when the paddle plate 305 is in the discharge port 104, the pull rope 310 is in a relaxed state. When the paddle plate 305 is completely moved out of the discharge port 104, the pull rope 310 begins to tighten.

[0045] In this embodiment, a paddle 305 is provided at the bottom of the vertical rod 208. When the vertical rod 208 moves downward, the paddle 305 tamps out the flux in the discharge port 104. When the vertical rod 208 moves upward, the active rack 308 drives the active gear 313 to rotate by meshing with the active gear 313, and further drives the driven gear 312 to rotate by meshing with the transmission gear 304 and the driven gear 312. The rotation of the driven gear 312 causes the driven rack 311 to rotate along the paddle 305. When the driven rack 311 drives the second slider 302 to move, the pull rope 310 installed on the side of the second slider 302 pulls the paddle plate 305 to rotate. When the paddle plate 305 rotates, the flux gathered above the discharge port 104 will be pushed away to prevent the flux from being squeezed and accumulated laterally above the discharge port 104, which is beneficial to ensure smooth discharge of the discharge port 104, making the discharge of the discharge port 104 more stable, and further improving the reliability of the device.

[0046] Embodiment 3: This embodiment aims to solve the problem that the flux will melt and agglomerate during welding, and the flux agglomerates need to be manually knocked off after welding once, which consumes manpower. This embodiment is an improvement made on the basis of embodiment 2. For details, please refer to Figures 1 to 13 A knocking mechanism 4100 is arranged at the bottom of the fixed shaft 402, and the knocking mechanism 4100 includes a fixed shaft 402, which is fixedly installed at the bottom of the flat plate 201, a rotating plate 403 is hinged on the fixed shaft 402, a plurality of knocking rods 404 are arranged at the bottom of the rotating plate 403, a No. 2 torsion spring 420 is arranged on the rotating plate 403, and the other end of the No. 2 torsion spring 420 is fixedly connected to the fixed shaft 402, and the rotating plate 403 is transmission-connected to the No. 2 roller 205.

[0047] It should be noted that, in the present embodiment, when the electric slider 102 moves from one end of the pipe to the other end of the pipe, the surfacing process completes one welding. At this time, the electric slider 102 no longer moves, waiting for the weld to cool completely. After the weld is cooled, the electric slider 102 moves in the opposite direction, the positioner 101 drives the pipe to rotate in the opposite direction, the rotating plate 403 swings back and forth, and the knocking rod 404 arranged on the rotating plate 403 knocks off the agglomerated flux, thereby facilitating the next welding.

[0048] For details, please refer to Figure 7 A second vertical plate 217 is installed at the bottom of the flat plate 201, a rotating rod 417 is rotatably installed on the second vertical plate 217, and the second roller 205 is installed on the rotating rod 417. A rotating sleeve 412 is installed on the side of the second vertical plate 217 close to the second roller 205, and a plurality of abutting rods 414 are arranged on the rotating sleeve 412, and the abutting rods 414 abut against the rotating plate 403. A connecting sleeve 413 is rotatably installed on the side of the second roller 205 away from the rotating sleeve 412, and the connecting sleeve 413 is fixedly connected to the rocker 216. The rotating sleeve 41 A first ratchet 418 is arranged inside the connecting sleeve 413, a second ratchet 421 is arranged inside the connecting sleeve 413, a first pawl 419 for engaging with the first ratchet 418 is hinged on the rotating rod 417, and a second pawl 422 for engaging with the second ratchet 421 is hinged on the rotating rod 417, wherein the first pawl 419 and the second pawl 422 can rotate in one direction through the cooperation of a spring, and the ratchet pawl is a common mechanical cooperation means, and the specific structure and principle of the ratchet pawl are well known to those skilled in the art, and will not be described in detail here.

[0049] It should be noted that during welding, the No. 2 ratchet 421 is engaged with the No. 2 pawl 422, while the No. 1 ratchet 418 is not engaged with the No. 1 pawl 419. Therefore, the No. 2 roller 205 will only drive the connecting sleeve 413 to rotate, and further drive the rocker 216 to rotate. When the flux agglomerates are knocked after welding, the rotation direction of the No. 2 roller 205 rotates in the opposite direction as the rotation direction of the rolling wheel 202 changes. At this time, the No. 1 ratchet 418 is engaged with the No. 1 pawl 419, while the No. 2 ratchet 421 is not engaged with the No. 2 pawl 422. Therefore, the No. 2 roller 205 will only drive the rotating sleeve 412 to rotate.

[0050] For details, please refer to Figure 8A No. 1 airbag 409 is installed on the side of the L-shaped plate 206, a No. 2 airbag 309 is installed on the side of the dial plate 305, a hose 416 is connected between the No. 2 airbag 309 and the No. 1 airbag 409, a pressure plate 410 is installed at one end of the No. 1 airbag 409, a cross bar 411 is installed on the pressure plate 410, a spring 315 is arranged on the rotating shaft 314, the spring 315 is configured as a volute spring, one end of the spring 315 is connected to the rotating shaft 314, and the other end of the spring 315 is connected to the driving gear 313. Specifically, when the driving rack 308 moves upward, the driving gear 313 rotates synchronously, and the spring 315 stores energy.

[0051] It should be noted that when the flux agglomerates are struck after welding, the position of the paddle 305 is located in the discharge port 104. If the paddle 305 is located above the discharge port 104, the spring 315 is in an energy storage state at this time, and the spring 315 will release energy to drive the active gear 313 to rotate in the opposite direction, so that the active rack 308 moves downward, further driving the L-shaped rod 209 and the vertical rod 208 to move downward, and the movement of the vertical rod 208 will cause the paddle 305 to return to the discharge port 104, and the movement of the L-shaped rod 209 will sequentially drive the No. 1 slider 214, the swing rod 215, and the rocker 216 at the bottom of the L-shaped rod 209 to rotate (see Figure 3 ).

[0052] From the above description, it can be understood that the No. 2 ratchet 421 and the No. 2 pawl 422 are not engaged, so the rotation of the rocker 216 and the rotation of the No. 2 roller 205 will not conflict with each other. Therefore, the paddle 305 will smoothly fall back into the discharge port 104. Therefore, when the flux agglomerates are knocked off after welding, the position of the paddle 305 can only be located in the discharge port 104.

[0053] Also, please refer to Figure 8 A sleeve 407 is installed on the electric slider 102, and a wedge-shaped bar 408 is slidably installed in the sleeve 407. The inclined surface of the wedge-shaped bar 408 contacts the pressure plate 410. A compression spring 425 is arranged in the sleeve 407, and the other end of the compression spring 425 contacts the wedge-shaped bar 408. An unlocking rod 405 is slidably installed on the electric slider 102, and a wedge-shaped block 415 is installed at one end of the unlocking rod 405. A wedge-shaped groove 423 is provided on the wedge-shaped bar 408, and the wedge-shaped groove 423 is arranged corresponding to the wedge block 415. A No. 2 tension spring 406 is sleeved on the unlocking rod 405, and the other end of the No. 2 tension spring 406 is fixedly connected to the electric slider 102.

[0054] Specifically, after one welding, the cross bar 411 conflicts with the positioner 101, the No. 1 airbag 409 is compressed, and the gas in the No. 1 airbag 409 enters the No. 2 airbag 309 through the hose 416, and the No. 2 airbag 309 expands and blocks the discharge port 104. At the same time, the pressing plate 410 conflicts with the inclined surface of the wedge strip 408, and the wedge strip 408 moves upward, and then the pressing plate 410 is separated from the inclined surface of the wedge strip 408, and the wedge strip 408 blocks the pressing plate 410 to prevent the No. 1 airbag 409 from rebounding and resetting. Therefore, when the flux agglomerates after welding are knocked, the No. 1 airbag 4 09 is always in a contracted state, and the No. 2 airbag 309 is always in an expanded state and blocks the discharge port 104. After the flux agglomerates are knocked, the electric slider 102 returns to the initial position and waits for the next welding. At this time, the unlocking rod 405 slidably installed on the electric slider 102 conflicts with the positioner 101, and the wedge block 415 extends into the wedge groove 423, so that the wedge bar 408 moves upward, and the wedge bar 408 releases the limit on the pressure plate 410, and the No. 1 airbag 409 rebounds and resets, and the No. 2 airbag 309 contracts, and the discharge port 104 is unblocked again to prepare for the next welding.

[0055] In this embodiment: after one welding, the rolling wheel 202 rolls in the opposite direction along the pipeline, and the No. 2 roller 205 rotates in the opposite direction through the transmission of the No. 1 roller 203 and the belt 204. At this time, the No. 1 ratchet 418 inside the rotating sleeve 412 is engaged with the No. 1 pawl 419, so that the No. 2 roller 205 drives the rotating sleeve 412 to rotate, and the abutting rod 414 arranged on the rotating sleeve 412 abuts against the rotating plate 403. Further, through the cooperation of the No. 2 torsion spring 420, the rotating plate 403 repeatedly swings, and at the same time, the knocking rod 404 arranged at the bottom end of the rotating plate 403 knocks off the flux agglomerates on the pipeline, thereby reducing manpower operation and improving the practicality of the device; Moreover, after one welding pass, the cross bar 411 on the side of the No. 1 airbag 409 conflicts with the positioner 101, the No. 1 airbag 409 contracts and discharges the gas into the No. 2 airbag 309 through the hose 416. After the No. 2 airbag 309 expands, it blocks the discharge port 104 to prevent the flux from falling from the discharge port 104 and causing loss when the flux agglomerates are knocked off, thereby further increasing the practicality of the device.

[0056] 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.

[0057] 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 cladding copper-nickel alloy pipe fittings, comprising a positioner (101), an electric slide block (102) being provided on the positioner (101), a welding gun (105) being provided at the bottom of the electric slide block (102), a flux barrel (103) for storing flux being provided at the bottom of the electric slide block (102), and a discharge port (104) being provided at the bottom of the flux barrel (103), characterized in that: A flat plate (201) is installed at the bottom of the electric slider (102), a rolling wheel (202) is arranged at the bottom of the flat plate (201), the rolling wheel (202) is in rolling contact with the alloy tube, a guide rod (213) is installed at the bottom of the flat plate (201), a first slider (214) is slidably arranged on the guide rod (213), an L-shaped rod (209) is installed on the side of the first slider (214), a vertical rod (208) is installed in the middle of the L-shaped rod (209), and the vertical rod (208) is located directly above the discharge port (104); The first sliding block (214) is drivingly connected to the rolling wheel (202), and during welding, the vertical rod (208) reciprocates through the discharge port (104).

2. A welding device for surfacing copper-nickel alloy pipe fittings according to claim 1, characterized in that: A first roller (203) is installed on the side of the rolling wheel (202), a second roller (205) is installed on the bottom of the flat plate (201), the first roller (203) and the second roller (205) are both configured as rollers with grooves, and belts (204) are installed in the grooves of the first roller (203) and the second roller (205), a rocker (216) is installed on the side of the second roller (205), the other end of the rocker (216) is hingedly connected to a swing rod (215), and the swing rod (215) is hingedly connected to the first slider (214).

3. A welding device for surfacing copper-nickel alloy pipe fittings according to claim 2, characterized in that: An L-shaped plate (206) is arranged at the bottom of the flat plate (201), a pressure rod (207) is slidably mounted on the L-shaped plate (206), the rolling wheel (202) is rotatably mounted on the bottom end of the pressure rod (207), a tension spring (212) is sleeved on the pressure rod (207), and the other end of the tension spring (212) is fixedly connected to the L-shaped plate (206); A lifting rod (211) is installed at the top end of the pressure rod (207), and a guide plate (210) is provided on the side of the positioner (101), wherein the guide plate (210) is configured as a trapezoidal plate with a cross section.

4. A welding device for surfacing copper-nickel alloy pipe fittings according to claim 3, characterized in that: A fixing plate (307) is installed at the bottom end of the vertical rod (208), a dial plate (305) is hinged at the bottom end of the fixing plate (307), a first torsion spring (306) is provided at one end of the dial plate (305), the other end of the first torsion spring (306) is fixedly connected to the fixing plate (307), a pull rope (310) is installed at the bottom end of the dial plate (305), and the pull rope (310) is transmission-connected to the L-shaped rod (209).

5. A welding device for surfacing copper-nickel alloy pipe fittings according to claim 4, characterized in that: The L-shaped rod (209) is provided with a driving rack (308); a first vertical plate (303) is installed at the bottom end of the flat plate (201); a rotating shaft (314) is rotatably installed on the side of the first vertical plate (303); a driving gear (313) for meshing with the driving rack (308) is provided on the rotating shaft (314); a transmission gear (304) is installed on the side of the driving gear (313); and a driven gear (312) for meshing with the transmission gear (304) is rotatably installed on the first vertical plate (303); A slide groove (301) is provided at the bottom of the flat plate (201), a second slider (302) is slidably installed in the slide groove (301), a driven rack (311) is installed at the bottom of the second slider (302), the driven rack (311) is meshed with the first vertical plate (303), and the second slider (302) is fixedly connected to the pull rope (310).

6. A welding device for surfacing copper-nickel alloy pipe fittings according to claim 5, characterized in that: A striking mechanism (4100) is provided at the bottom of the fixed shaft (402), and the striking mechanism (4100) comprises a fixed shaft (402), the fixed shaft (402) is fixedly mounted at the bottom of the flat plate (201), a rotating plate (403) is hingedly connected to the fixed shaft (402), a plurality of striking rods (404) are provided at the bottom of the rotating plate (403), a No. 2 torsion spring (420) is provided on the rotating plate (403), the other end of the No. 2 torsion spring (420) is fixedly connected to the fixed shaft (402), and the rotating plate (403) is drivingly connected to the No. 2 roller (205).

7. A welding device for surfacing copper-nickel alloy pipe fittings according to claim 6, characterized in that: A second vertical plate (217) is installed at the bottom of the flat plate (201), a rotating rod (417) is rotatably installed on the second vertical plate (217), the second roller (205) is installed on the rotating rod (417), a rotating sleeve (412) is installed on the side of the second vertical plate (217) close to the second roller (205), a plurality of abutting rods (414) are arranged on the rotating sleeve (412), the abutting rods (414) abut against the rotating plate (403), a connecting sleeve (413) is rotatably installed on the side of the second roller (205) away from the rotating sleeve (412), and the connecting sleeve (413) is fixedly connected to the rocker (216); A first ratchet (418) is arranged inside the rotating sleeve (412), a second ratchet (421) is arranged inside the connecting sleeve (413), a first pawl (419) for engaging with the first ratchet (418) is hingedly connected to the rotating rod (417), and a second pawl (422) for engaging with the second ratchet (421) is hingedly connected to the rotating rod (417).

8. A welding device for surfacing copper-nickel alloy pipe fittings according to claim 7, characterized in that: A first airbag (409) is installed on the side of the L-shaped plate (206), a second airbag (309) is installed on the side of the shift plate (305), a hose (416) is connected between the second airbag (309) and the first airbag (409), a pressure plate (410) is installed at one end of the first airbag (409), and a crossbar (411) is installed on the pressure plate (410); A spring (315) is disposed on the rotating shaft (314); one end of the spring (315) is connected to the rotating shaft (314), and the other end of the spring (315) is connected to the driving gear (313).

9. A welding device for surfacing copper-nickel alloy pipe fittings according to claim 8, characterized in that: A sleeve (407) is installed on the electric slider (102), a wedge-shaped bar (408) is slidably installed in the sleeve (407), the inclined surface of the wedge-shaped bar (408) abuts against the pressure plate (410), a compression spring (425) is arranged in the sleeve (407), and the other end of the compression spring (425) abuts against the wedge-shaped bar (408); An unlocking rod (405) is slidably mounted on the electric slider (102), a wedge block (415) is mounted on one end of the unlocking rod (405), a wedge groove (423) is provided on the wedge bar (408), the wedge groove (423) is arranged corresponding to the wedge block (415), a second tension spring (406) is sleeved on the unlocking rod (405), and the other end of the second tension spring (406) is fixedly connected to the electric slider (102).

10. A welding method for cladding copper-nickel alloy pipe fittings, comprising a welding device for cladding copper-nickel alloy pipe fittings according to any one of claims 1 to 9, characterized in that: The method comprises the following specific steps: S1. Preparation before welding: install the alloy tube on the positioner (101), ensure that the welding equipment (such as welding machine, wire feeder, protective gas device, etc.) works normally, clean the area to be welded, and remove impurities such as oil, rust, etc.; S2, surfacing operation: multi-layer multi-pass welding is adopted, the thickness of each layer is controlled to be 2-4 mm, and the vertical rod (208) is used to continuously pass through the discharge port (104) to prevent the discharge port (104) from being blocked. After each layer is welded, the discharge port (104) is blocked and the welding slag and spatter are cleaned; S3. Post-weld treatment: Keep warm for a while after welding, cool slowly to reduce stress, check whether there are defects such as cracks and pores on the weld surface, grind and polish the weld to ensure a smooth surface.

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