Electric water heater liner welding device and welding process

Abstract

The application discloses an electric water heater inner container welding device and a welding process, relates to the electric water heater inner container welding technical field, and comprises a fixed base, one side of the fixed base is provided with a positioning mechanism, and one side of the fixed base is provided with a mechanical arm. In the application, compressed gas is sprayed out through the spraying port at the bottom of the gas outlet pipe, the micro air cylinder works to drive the moving frame to move, the second rotating rod and the first rotating rod rotate to drive the first fixed plate and the gas outlet pipe to make arc motion, the direction of the sprayed gas flow is changed, dust generated in the welding process is sprayed outward, then the spraying port at the bottom of the gas outlet pipe stops working, the micro air cylinder works to drive the moving frame to move reversely, the four gas outlet pipes move inward to the initial positions, and in the process that the spraying assembly reciprocatingly moves outward to spray the gas and moves inward to retract and stop spraying, the dust is continuously blown outward through the outward diffusion of the gas flow, and the dust is prevented from absorbing or scattering the laser energy generated by the laser welding device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric water heater inner tank welding, in particular to an electric water heater inner tank welding device and welding process. BACKGROUND

[0002] The electric water heater refers to a water heater that uses electricity as energy for heating, and is one of the three major water heaters together with gas water heaters and solar water heaters. The inner tank of the electric water heater refers to the part for storing hot water in the electric water heater, which is usually made of different materials. The production of the inner tank requires a welding device to weld the joint position of the butt joint between the cylinder body, the upper cover, and the lower cover.

[0003] For example, the "electric water heater inner tank laser welding machine" with publication number CN218426349U includes a bed body, an end cover mold positioning mechanism, a material cylinder positioning clamp, a wire rail moving mechanism, a three-axis mechanical arm, and a laser welder. The three-axis mechanical arm is located on the side of the bed body and holds the laser welder. The material cylinder positioning clamp is located in the middle of the bed body and is used to lift the cylinder body to the processing height. There are end cover mold positioning mechanisms at both ends of the cylinder body. One end cover mold positioning mechanism is fixed at one end of the bed body.

[0004] In the prior art, the welding environment needs to be kept clean and stable during laser welding. Dust and plasma are generated during welding. The dust will drift in the welding area and will also absorb or scatter the laser energy generated by the laser welder, resulting in uneven energy distribution in the welding area, insufficient welding strength, discontinuous welds, and other problems. When a dust removal device is used directly to remove dust from the welding area, the airflow will interfere with the welding process, causing the liquid metal in the molten pool to flow turbulently, affecting the solidification process of the molten pool, and resulting in poor weld formation. SUMMARY

[0005] The purpose of the present application is to provide an electric water heater inner tank welding device and welding process to solve the problem of directly using a dust removal device to remove dust from the welding area, which will interfere with the welding process, causing the liquid metal in the molten pool to flow turbulently, affecting the solidification process of the molten pool, and resulting in poor weld formation.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a kind of electric water heater liner welding device, including fixed base, the side of the fixed base is equipped with positioning mechanism, the side of the fixed base is equipped with mechanical arm, the end of the mechanical arm is equipped with welding mechanism, the welding mechanism includes laser welder, the end of the laser welder is equipped with mounting bracket, the side of the mounting bracket is equipped with two groups of spray components, each group of the spray component includes two gas outlet pipes, fixed communication between the two gas outlet pipes of same group has telescopic pipe, the outer surface of the gas outlet pipe is all fixedly connected with first fixed plate, the other end of the first fixed plate is fixedly connected with steering lever, the outer rotationally connected with second fixed plate of the steering lever, the other end of the second fixed plate is fixedly connected with the side of mounting bracket, the outside of each group of the spray component is equipped with direction adjusting component, the direction adjusting component includes two first rotating rods, the middle portion of each of the steering lever in each group is fixedly connected with the end of first rotating rod, the end of the first rotating rod is rotationally connected with second rotating rod, the end of the second rotating rod is rotationally connected with moving push block, the end of the moving push block is fixedly connected with moving frame, the outside of the laser welder is equipped with connecting frame, the end of the connecting frame is equipped with suction component.

[0007] Preferably, fixed communication between the two first fixed plates of different groups has connecting pipe, the outside of the connecting pipe is fixedly connected with second pipe joint.

[0008] Preferably, the end of the two steering levers of same group is all fixedly connected with bevel gear, meshing between two bevel gears, by meshing between bevel gears, can drive two bevel gears to rotate outward or rotate inward at the same time.

[0009] Preferably, the suction component includes annular dust collection pipe, the side of the annular dust collection pipe is annularly distributed with spray head, the other side of the annular dust collection pipe is fixedly connected with gas conveying pipe, the end of the gas conveying pipe is fixedly connected with first pipe joint, the direction of multiple spray heads of annular distribution is all perpendicular to the direction of light shield, and is set downward, and the end of the first pipe joint is circumscribed with dust collection component.

[0010] Preferably, the side of the moving frame is fixedly connected with positioning slide rod, the outside of the positioning slide rod is slidably connected with mounting bracket, the end of the positioning slide rod is fixedly connected with positioning displacement plate.

[0011] Preferably, the side of the mounting bracket is fixedly connected with micro air cylinder, the end of the micro air cylinder is fixedly connected with the side of mounting bracket and moving frame.

[0012] Preferably, the outer part of the connecting frame is fixedly connected with a light shield, the inner side wall of the light shield is fixedly connected with compensation lamps, the compensation lamps are multiple, and are all inclined to the central position of the light shield. The compensation lamps can provide additional light, enhance the brightness of the welding area, enable the vision system to obtain clearer and higher-contrast images, help to accurately identify the position and shape of the weld, improve the precision of the weld tracking, and the light shield can reduce the scattering and reflection of the laser, so that the vision system can more accurately obtain the real image of the welding area.

[0013] Preferably, the positioning mechanism comprises a first support seat and a second support seat, one end of the first support seat and one end of the second support seat are fixedly connected with one side of the fixed base, one side of the first support seat is fixedly connected with a driving motor, the output end of the driving motor penetrates through the first support seat and is fixedly connected with a first turntable, the driving motor is composed of a motor and a speed reducer, and the driving motor can control the inner container of the electric water heater to rotate at a required speed, so that the seams of the inner container of the electric water heater, the upper cover and the lower cover are welded.

[0014] Preferably, one side of the second support seat is fixedly connected with a hydraulic cylinder, one end of the hydraulic cylinder penetrates through one side of the second support seat and is fixedly connected with a guide push rod, one end of the guide push rod is rotatably connected with a second turntable, one end of the second turntable is in contact with one end of the inner container of the electric water heater, the hydraulic cylinder adjusts the positions of the guide push rod and the second turntable, the first turntable and the second turntable cooperate to position the inner container of the electric water heater, and the second turntable is rotatably arranged and can rotate while the inner container of the electric water heater rotates during welding.

[0015] An electric water heater inner container welding process, comprising the following steps:

[0016] S1, first, the assembled electric water heater inner container is transferred to between the first turntable and the second turntable, one end of the electric water heater inner container is in abutment with the first turntable, and the hydraulic cylinder works to drive the second turntable to move in abutment with the other end of the inner container, so as to position the inner container to be machined;

[0017] S2, the position of the welding mechanism is moved to the welding position by the work of the mechanical arm, the inner container to be machined is rotated by the work of the driving motor, and the inner container is welded by the laser welder;

[0018] S3, during the welding process, one end of the second pipe joint is connected with a compressed gas storage system, the compressed gas storage system outputs compressed gas from a gas storage tank through a pneumatic pump, the compressed gas fills the connecting pipe, the gas outlet pipe and the telescopic pipe in sequence, and is sprayed from the spray ports of the gas outlet pipe, the spray ports at the bottom of the gas outlet pipe are all vertically downward in the initial state, then the moving frame moves by the work of the micro pneumatic cylinder, the second rotating rod and the first rotating rod rotate, the steering rod and the gas outlet pipe rotate in sequence, the spray ports at the bottom of the four gas outlet pipes rotate outward, and the gas is sprayed to the surrounding.

[0019] S4, the welding dust is blown outward, the first pipe joint is connected with the dust collection system, and the dust blown outward is collected in the dust collection system through the annular dust collection pipe and the gas conveying pipe.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] 1. In the present application, the compressed gas is sprayed out through the spray port at the bottom of the gas outlet pipe, the micro air cylinder drives the moving frame to move, the second rotating rod and the first rotating rod rotate, and the first fixed plate and the gas outlet pipe move in an arc shape, changing the direction of the spray gas flow, and the dust generated by welding is sprayed outward. Then the spray port at the bottom of the gas outlet pipe stops working, the micro air cylinder drives the moving frame to move in the opposite direction, and the four gas outlet pipes move inward to the initial position. During the process of the spray assembly reciprocating outward to spray gas and retracting inward to stop spraying, the dust is blown outward by the continuous diffusion of the gas flow, preventing the dust from absorbing or scattering the laser energy generated by the laser welding device.

[0022] 2. In the present application, during the process of diffusing the dust outward, the suction assembly of the external dust collection system works, the spray heads at the bottom of the annular dust collection pipe are distributed in a ring shape, and are all in a vertical direction, absorbing the dust diffused outward. The dust is collected and treated in the dust collection system through the annular dust collection pipe and the gas conveying pipe, keeping the welding environment clean and stable, and avoiding the interference of the gas flow and the dust on the welding process.

[0023] 3. In the present application, by cooperating the light shield and the compensation lamp arranged obliquely inside the light shield, when the dust generated by welding is sprayed outward, the light shield can block the diffused dust, preventing the dust from diffusing in a large range, and reducing the scattering and reflection of the laser. The compensation lamp can provide additional light, enhancing the brightness of the welding area, which is helpful for accurately identifying the position and shape of the weld, and improving the precision of the weld tracking. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic view of the welding mechanism and the mechanical arm connecting structure of the electric water heater liner welding device of the present application;

[0025] Figure 2 It is a schematic view of the welding mechanism connecting structure of the electric water heater liner welding device of the present application;

[0026] Figure 3 It is a schematic view of the internal cross-sectional structure of the welding mechanism of the electric water heater liner welding device of the present application;

[0027] Figure 4 It is a schematic view of the internal planar structure of the welding mechanism of the electric water heater liner welding device of the present application;

[0028] Figure 5 Flow chart for reducing airflow interference of the electric water heater liner welding device of the present application;

[0029] Figure 6 Working schematic diagram of the spraying assembly of the electric water heater liner welding device of the present application;

[0030] Figure 7 Disassembled structural schematic diagram of the welding mechanism of the electric water heater liner welding device of the present application;

[0031] Figure 8 Connecting structural installation schematic diagram of the spraying assembly and the direction adjusting assembly of the electric water heater liner welding device of the present application;

[0032] Figure 9 Connecting structural schematic diagram of the spraying assembly of the electric water heater liner welding device of the present application;

[0033] Figure 10 First three-dimensional structural schematic diagram of the electric water heater liner welding device of the present application;

[0034] Figure 11 Second three-dimensional structural schematic diagram of the electric water heater liner welding device of the present application.

[0035] In the figure: 1, fixed base; 2, welding mechanism; 21, laser welder; 22, light shield; 23, air suction assembly; 231, first pipe joint; 232, air conveying pipe; 233, annular dust collection pipe; 24, connecting frame; 25, compensation lamp; 26, spraying assembly; 261, first fixed plate; 262, air outlet pipe; 263, second pipe joint; 264, bevel gear; 265, telescopic pipe; 266, second fixed plate; 267, steering lever; 268, connecting pipe; 27, direction adjusting assembly; 271, positioning displacement plate; 272, first rotating lever; 273, second rotating lever; 274, micro air cylinder; 275, moving frame; 276, moving push block; 277, positioning slide rod; 28, mounting bracket; 3, mechanical arm; 4, positioning mechanism; 41, first support seat; 42, driving motor; 43, first turntable; 44, second turntable; 45, guide push rod; 46, second support seat; 47, hydraulic cylinder. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] Embodiment one: refer toFigure 1 Figure 11 The utility model provides an electric water heater liner welding device, including fixed base 1, the side of fixed base 1 is installed with positioning mechanism 4, the side of fixed base 1 is installed with mechanical arm 3, and one end of mechanical arm 3 is installed with welding mechanism 2, and welding mechanism 2 includes laser welder 21, and one end of laser welder 21 is installed with mounting bracket 28, and the side of mounting bracket 28 is installed with two groups of injection assembly 26, and each group of injection assembly 26 includes two gas outlet pipes 262, and the fixed intercommunication of two gas outlet pipes 262 of same group has telescopic pipe 265, and the outer surface of gas outlet pipe 262 is fixedly connected with first fixed plate 261, and the other end of first fixed plate 261 is fixedly connected with steering rod 267, and the outer rotation of steering rod 267 is connected with second fixed plate 266, and the other end of second fixed plate 266 is fixedly connected with the side of mounting bracket 28, and the outside of each group of injection assembly 26 is installed with direction adjusting assembly 27, and direction adjusting assembly 27 includes two first rotation rods 272, and the middle part of each steering rod 267 of each group is fixedly connected with one end of first rotation rod 272, and one end of first rotation rod 272 is rotatably connected with second rotation rod 273, and one end of second rotation rod 273 is rotatably connected with moving push block 276, and one end of moving push block 276 is fixedly connected with moving frame 275, and the outside of laser welder 21 is installed with connecting frame 24, and one end of connecting frame 24 is installed with suction assembly 23;

[0038] The fixed intercommunication of two first fixed plates 261 of different groups has connecting pipe 268, and the outside of connecting pipe 268 is fixedly connected with second pipe joint 263;One end of two steering rods 267 of same group is fixedly connected with bevel gear 264, and the meshing between two bevel gears 264 can drive two bevel gears 264 to rotate outward or inward simultaneously;Suction assembly 23 includes annular dust collection pipe 233, and the side of annular dust collection pipe 233 is annularly distributed with spray head, and the other side of annular dust collection pipe 233 is fixedly connected with gas conveying pipe 232, and one end of gas conveying pipe 232 is fixedly connected with first pipe joint 231, and the direction of multiple spray heads of annular distribution is perpendicular to the direction of light shield 22, and is arranged downward, and one end of first pipe joint 231 is connected with dust collection assembly;One side of moving frame 275 is fixedly connected with positioning slide rod 277, and the outside of positioning slide rod 277 is slidably connected with the side of mounting bracket 28, and one end of positioning slide rod 277 is fixedly connected with positioning displacement plate 271;One side of mounting bracket 28 is fixedly connected with micro pneumatic cylinder 274, and one end of micro pneumatic cylinder 274 passes through the side of mounting bracket 28 and is fixedly connected with the side of moving frame 275.

[0039] ​The mechanical arm 3 is provided as a multi-axis manipulator, which can drive the welding mechanism 2 to move in a three-dimensional space. The mechanical arm 3 drives the welding mechanism 2 to move, and the laser welding device 21 is moved to the welding position for welding. When the laser welding device 21 is welding, the second pipe joint 263 is connected with a compressed gas storage system. The compressed gas storage system is composed of a gas storage tank, a pneumatic pump and a conveying pipe. The compressed gas is stored in the gas storage tank and is output from the gas storage tank by the pneumatic pump. The first pipe joint 231 is connected with a dust collection system. The dust collection system is composed of a dust collection host, a pipe network and a dust collection assembly. Harmful gas and dust are sucked into a large-capacity collection box through a vacuum dust collection pipeline. The compressed gas enters the connecting pipe 268 and the two gas outlet pipes 262 through the second pipe joint 263, enters the inside of the other two gas outlet pipes 262 through the connected telescopic pipe 265, and is provided with a plurality of injection ports at the bottom of the gas outlet pipe 262. The plurality of injection ports are equidistantly distributed. The compressed gas is injected through the injection ports at the bottom of the gas outlet pipe 262. At this time, the initial state of the gas flow injected by the injection ports at the bottom of the gas outlet pipe 262 is vertical.

[0040] During the injection process, the micro-cylinder 274 drives the moving frame 275 to move, the positioning slide rod 277 and the positioning displacement plate 271 move, the positioning slide rod 277 slides in the installation support 28, the moving frame 275 moves linearly, the moving push block 276 moves, the second rotating rod 273 and the first rotating rod 272 rotate, the steering rod 267 connected therewith rotates, one end of each group of steering rods 267 is provided with a bevel gear 264, the two bevel gears 264 of the same group are engaged, and the steering rod 267 connected with the first rotating rod 272 rotates, and the other steering rod 267 of the group rotates at the same time, so as to drive the plurality of first fixed plates 261 and the gas outlet pipe 262 to move in an arc shape. The injection ports at the bottom of the four gas outlet pipes 262 are inclined outward, the direction of the injected gas flow is changed, the dust generated during welding is injected outward, the light shield 22 can block the diffused dust, the dust diffusion range is prevented from being large, the telescopic pipe 265 has a certain telescopic range, and the telescopic pipe 265 can be elongated when the connected two gas outlet pipes 262 expand outward, so as to prevent the influence on the conveying of the gas flow;

[0041] In the process of dust spreading outwards, the suction assembly 23 of the external dust suction system works, the nozzles at the bottom of the annular dust suction pipe 233 are distributed annularly and vertically, and they suck the dust spreading outwards. The dust is sent into the dust suction system through the annular dust suction pipe 233 and the air conveying pipe 232 for collection and treatment. Then the compressed gas storage system stops supplying gas, the micro-cylinder 274 works to drive the moving frame 275 to move reversely, the four air outlet pipes 262 move inwards to the initial position, the jetting ports on the air outlet pipes 262 return to the vertical state, and after the air outlet pipes 262 return to the initial position, the compressed gas storage system continues to work to deliver compressed gas, while the air outlet pipes 262 start to move outwards. The micro-cylinder 274 works to drive the jetting assembly 26 to reciprocate and expand outwards and retract inwards. The compressed gas storage system supplies gas intermittently. In the process of the jetting assembly 26 reciprocating and expanding outwards to jet gas and retracting inwards to stop jetting, the airflow continuously spreads outwards to blow the dust outwards, and the airflow stops delivering during the retraction process to prevent the airflow from taking the dust and plasma back to the inner circle, prevent the dust from absorbing or scattering the laser energy generated by the laser welder 21 working, and ensure the stability of the welding process and the welding quality.

[0042] Embodiment two: as Figure 3 , Figure 4 , Figure 10 and Figure 11As shown, the outer part of the connecting frame 24 is fixedly connected with a light shield 22, the inner side wall of the light shield 22 is fixedly connected with a compensation lamp 25, the compensation lamp 25 is multiple, and is inclined to the center position of the light shield 22, the compensation lamp 25 can provide additional light, enhance the brightness of the welding area, make the vision system obtain clearer and higher contrast image, help to accurately identify the position and shape of the weld, improve the precision of the weld tracking, the light shield 22 can reduce the scattering and reflection of the laser, so that the vision system can more accurately obtain the real image of the welding area; the positioning mechanism 4 includes a first support seat 41 and a second support seat 46, one end of the first support seat 41 and one end of the second support seat 46 are fixedly connected with one side of the fixed base 1, one side of the first support seat 41 is fixedly connected with a drive motor 42, the output end of the drive motor 42 is fixedly connected with a first turntable 43 through the first support seat 41, the drive motor 42 is composed of a motor and a speed reducer, which can control the rotation speed of the electric water heater inner container to be machined, and weld the joint position of the inner container cylinder, upper cover and lower cover of the electric water heater; one side of the second support seat 46 is fixedly connected with a hydraulic cylinder 47, one end of the hydraulic cylinder 47 is fixedly connected with a guide push rod 45 through one side of the second support seat 46, one end of the guide push rod 45 is rotatably connected with a second turntable 44, one end of the second turntable 44 is in contact with one end of the electric water heater inner container, the hydraulic cylinder 47 adjusts the position of the guide push rod 45 and the second turntable 44, the first turntable 43 and the second turntable 44 cooperate to position the electric water heater inner container, and the second turntable 44 is rotatably arranged and can rotate with the electric water heater inner container during welding.

[0043] When welding the electric water heater inner container to be machined, the cylinder, upper cover and lower cover are assembled into an inner container, and the assembled inner container is placed on the positioning mechanism 4, one end of the inner container abuts against one side of the first turntable 43, the hydraulic cylinder 47 drives the guide push rod 45 and the second turntable 44 to move, so that the second turntable 44 abuts against the other end of the inner container, the inner container is positioned by cooperation between the second turntable 44 and the first turntable 43, the drive motor 42 drives the first turntable 43 to rotate, and the inner container rotates accordingly to weld the joint position at different positions. During the welding process, the setting of the light shield 22 can block part of the strong light, so that the light conditions of the welding area are more stable and controllable. The compensation lamps 25 are installed on the four inner side walls of the light shield 22, and the multiple inclined compensation lamps 25 are irradiated on the center area of the welding area to provide additional light and enhance the brightness of the welding area, which helps the vision system to accurately identify the position and shape of the weld and improves the precision of the weld tracking.

[0044] Embodiment three: a welding process for an electric water heater inner container, comprising the following steps:

[0045] S1, first transfer the assembled electric water heater liner to the first rotating disc 43 and the second rotating disc 44, one end of the electric water heater liner abuts against the first rotating disc 43, the hydraulic cylinder 47 drives the second rotating disc 44 to move and abut against the other end of the liner, the liner to be processed is positioned to prevent the liner from moving during processing.

[0046] S2, the mechanical arm 3 works to drive the position of the welding mechanism 2 to move to the welding position, the driving motor 42 works to drive the liner to be processed to rotate, the liner can be welded at different butt joints, the laser welder 21 welds the liner, the four side walls inside the light shield 22 are obliquely installed with compensation lamps 25 for illumination, and the brightness of the welding area is enhanced;

[0047] S3, during the welding process, one end of the second pipe joint 263 is connected with the compressed gas storage system, the compressed gas storage system outputs compressed gas from the gas storage tank through the pneumatic pump, the compressed gas fills the connecting pipe 268, the gas outlet pipe 262 and the telescopic pipe 265 in turn, and is sprayed from the spray port of the gas outlet pipe 262, the spray ports at the bottom of the gas outlet pipe 262 are all vertical downward in the initial state, then the micro pneumatic cylinder 274 drives the moving frame 275 to move, the second rotating rod 273 and the first rotating rod 272 rotate, the steering rod 267 and the gas outlet pipe 262 rotate in turn, so that the spray ports at the bottom of the four gas outlet pipes 262 rotate outward, the gas is sprayed to the surrounding, the dust scattered around is diffused outward to prevent the dust from accumulating at the welding position and affecting the welding;

[0048] S4, the dust generated during welding is blown outward, the first pipe joint 231 is connected with the dust collection system, the suction assembly 23 works, the spray heads at the bottom of the annular dust collection pipe 233 are annularly distributed and are all vertical, the dust diffused outward is absorbed, and the dust blown to the surrounding is collected through the annular dust collection pipe 233 and the gas conveying pipe 232.

[0049] The working principle and method of using the device: first, the cylinder, the upper cover and the lower cover are assembled into the liner, the assembled electric water heater liner is transferred to the positioning mechanism 4 by the mechanical hand, one end of the liner abuts against one side of the first turntable 43, the hydraulic cylinder 47 drives the guide push rod 45 and the second turntable 44 to move, so that the second turntable 44 abuts against the other end of the liner, the liner is positioned by cooperating between the second turntable 44 and the first turntable 43, the driving motor 42 works to drive the first turntable 43 to rotate, and the liner rotates accordingly, so that the seams at different positions can be conveniently welded, the mechanical arm 3 works to move the laser welder 21 to the welding position for welding, and in the welding process, one end of the second pipe joint 263 is connected with the compressed gas storage system, the compressed gas enters the connecting pipe 268 and the two gas outlet pipes 262 inside through the second pipe joint 263, enters the inside of the other two gas outlet pipes 262 through the communicating telescopic pipe 265, and is sprayed out through the spray ports at the bottom of the gas outlet pipes 262;

[0050] Then the micro cylinder 274 works to drive the moving frame 275 to move, the positioning slide rod 277 and the positioning displacement plate 271 move accordingly, drive the positioning slide rod 277 to slide on the mounting bracket 28, fix the linear motion of the moving frame 275, the moving push block 276 moves accordingly, the second rotating rod 273 and the first rotating rod 272 rotate, drive the steering rod 267 to rotate, the first fixed plate 261 and the gas outlet pipe 262 make arc motion, the spray ports at the bottom of the four gas outlet pipes 262 tilt outward, change the direction of the jet gas flow, and spray the dust generated by welding outward, and at this time, the first pipe joint 231 is connected with the dust collection system to work, the spray head at the bottom of the annular dust collection pipe 233 works to absorb the diffused dust, and the dust is collected and treated in the dust collection system through the annular dust collection pipe 233 and the gas conveying pipe 232. Then the annular dust collection pipe 233 continues to work to absorb dust, the micro cylinder 274 works to drive the moving frame 275 to move reversely, and the four gas outlet pipes 262 move inward to the initial position. In this process, the gas outlet pipes 262 stop spraying gas outward, and after returning to the initial position, continue to move outward to spray gas, so that the dust is blown outward by the continuous diffusion of the gas flow, preventing the dust from absorbing or scattering the laser energy generated by the work of the laser welder 21. The compensation lamp 25 is installed on the four side walls inside the light shield 22, providing additional light and enhancing the brightness of the welding area.

[0051] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A welding device for an inner tank of an electric water heater, comprising a fixed base (1), characterized in that: A positioning mechanism (4) is installed on one side of the fixed base (1), a mechanical arm (3) is installed on one side of the fixed base (1), a welding mechanism (2) is installed on one end of the mechanical arm (3), the welding mechanism (2) includes a laser welder (21), a mounting bracket (28) is installed on one end of the laser welder (21), two groups of injection assemblies (26) are installed on one side of the mounting bracket (28), each group of the injection assemblies (26) includes two air outlet pipes (262), and the two injection assemblies in the same group are connected to each other. The outlet pipes (262) are fixedly connected with a telescopic pipe (265), the outer surface of each outlet pipe (262) is fixedly connected with a first fixed plate (261), the other end of the first fixed plate (261) is fixedly connected with a steering rod (267), the outer portion of the steering rod (267) is rotatably connected with a second fixed plate (266), the other end of the second fixed plate (266) is fixedly connected to one side of the mounting bracket (28), and the outer portion of each group of the injection assembly (26) is equipped with a direction adjustment assembly (27). ), the direction adjustment component (27) is used to adjust the direction of the injection port in the injection component (26), and the injection component (26) is used to blow the floating dust to the surroundings. The direction adjustment component (27) includes two first rotating rods (272), and the middle part of one of the steering rods (267) in each group is fixedly connected to one end of the first rotating rod (272), one end of the first rotating rod (272) is rotatably connected to the second rotating rod (273), and one end of the second rotating rod (273) is rotatably connected to the moving rod (273). A movable push block (276), one end of which is fixedly connected to a movable frame (275), a connecting frame (24) is installed on the outside of the laser welder (21), one end of which is installed an air suction component (23), the air suction component (23) is used to absorb dust blown around by the injection component (26), the air suction component (23) is arranged on the outer ring of the injection component (26), and the nozzle position of the air suction component (23) is located below the nozzle of the injection component (26).

2. The electric water heater inner tank welding device according to claim 1, characterized in that: A connecting pipe (268) is fixedly connected between two first fixing plates (261) in different groups, and the outside of the connecting pipe (268) is fixedly connected to a second pipe joint (263).

3. The electric water heater inner tank welding device according to claim 2, characterized in that: One end of the two steering rods (267) in the same group is fixedly connected to a bevel gear (264), and the two bevel gears (264) are meshed with each other.

4. The electric water heater inner tank welding device according to claim 3, characterized in that: The suction assembly (23) comprises an annular dust suction pipe (233), one side of which is provided with nozzles in an annular pattern, the other side of which is fixedly connected to an air supply pipe (232), and one end of which is fixedly connected to a first pipe joint (231).

5. The electric water heater inner tank welding device according to claim 4, characterized in that: One side of the movable frame (275) is fixedly connected to a positioning slide bar (277), the outside of the positioning slide bar (277) is slidably connected to the mounting bracket (28), and one end of the positioning slide bar (277) is fixedly connected to a positioning shift plate (271).

6. The electric water heater inner tank welding device according to claim 5, characterized in that: A micro cylinder (274) is fixedly connected to one side of the mounting bracket (28), and one end of the micro cylinder (274) passes through the mounting bracket (28) and is fixedly connected to one side of the moving frame (275).

7. The electric water heater inner tank welding device according to claim 6, characterized in that: The outside of the connection frame (24) is fixedly connected to a light shield (22), and the inner side wall of the light shield (22) is fixedly connected to a compensation lamp (25).

8. The electric water heater inner tank welding device according to claim 7, characterized in that: The positioning mechanism (4) comprises a first support seat (41) and a second support seat (46), one end of the first support seat (41) and one end of the second support seat (46) are both fixedly connected to one side of the fixed base (1), one side of the first support seat (41) is fixedly connected to a drive motor (42), and an output end of the drive motor (42) passes through the first support seat (41) and is fixedly connected to a first turntable (43).

9. The electric water heater inner tank welding device according to claim 8, characterized in that: One side of the second support seat (46) is fixedly connected to a hydraulic cylinder (47), one end of the hydraulic cylinder (47) passes through one side of the second support seat (46) and is fixedly connected to a guide push rod (45), and one end of the guide push rod (45) is rotatably connected to the second turntable (44).

10. A welding process for the inner tank of an electric water heater, characterized by: An electric water heater inner tank welding device according to any one of claims 1 to 9 is used, comprising the following steps: S1. First, the assembled inner tank of the electric water heater is transferred between the first turntable (43) and the second turntable (44). One end of the inner tank of the electric water heater is brought into contact with the first turntable (43). The hydraulic cylinder (47) is driven to move the second turntable (44) to abut against the other end of the inner tank, thereby positioning the inner tank to be processed. S2, the robot arm (3) drives the welding mechanism (2) to move to the welding position, the driving motor (42) drives the inner liner to be processed to rotate, and the laser welder (21) welds the inner liner; S3. During the welding process, one end of the second pipe joint (263) is connected to the compressed gas storage system. The compressed gas storage system outputs the compressed gas from the gas tank through the pneumatic pump. The gas sequentially fills the connecting pipe (268), the gas outlet pipe (262) and the telescopic pipe (265), and is ejected from the injection port of the gas outlet pipe (262). The injection ports at the bottom of the gas outlet pipe (262) are all downwardly vertical in the initial state. Then, the micro cylinder (274) drives the moving frame (275) to move, the second rotating rod (273) and the first rotating rod (272) rotate, and the steering rod (267) and the gas outlet pipe (262) rotate in sequence, so that the injection ports at the bottom of the four gas outlet pipes (262) rotate outward, and the gas is ejected in all directions. S4. Blow the welding dust outwards. The first pipe joint (231) is connected to an external dust collection system. The dust blown to the surroundings enters the dust collection system through the annular dust collection pipe (233) and the air supply pipe (232) for collection.

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