Automatic welding device for water pump turbine

Abstract

The invention discloses an automatic welding device for a water pump turbine, and belongs to the technical field of water pump turbine welding, the automatic welding device comprises a welding frame, a welding assembly and an automatic cooling assembly, the upper surface of the welding frame is fixedly connected with a supporting frame, the upper surface of the supporting frame is provided with a first electric push rod, and the output shaft end of the first electric push rod is connected with a welding sleeve; the welding assembly is driven by the first electric push rod to move up and down, a welding head can accurately reach a to-be-welded area, then the welding disc is driven to rotate through mutual cooperation of the driving motor and the driving rod, the welding disc is driven to rotate, the welding head is driven to rotate, and the welding assembly is driven to move up and down through the first electric push rod. The welding rod is promoted to move along the arc-shaped track of the welding groove, meanwhile, the welding machine is started to conduct welding work, the welding gun and the welding head conduct welding work, and therefore efficient welding can be conducted on a plurality of welding areas at the same time, the problem of low efficiency of traditional single-point welding is avoided, and the production period is remarkably shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of water pump turbine welding, and more specifically, to an automatic welding device for water pump turbines. Background Art

[0002] A water pump turbine is a device that uses the energy of fluid (liquid) flow to do work. Its main function is to convert the energy of the fluid into mechanical energy, and then drive other equipment or generators to generate electrical energy. Among them, automatic welding during the processing of water pump turbines is particularly important because it can ensure that the combination between the blade plate and the turntable has sufficient strength and durability.

[0003] When the existing automatic welding device for water pump turbines is in use, the blade plate and the turntable to be welded are usually fixed on the fixture of the welding machine to ensure their accurate positions. The welding machine is started through the control panel for welding. At the same time, the welding speed, current, and voltage are adjusted, and the position of the welding head is adjusted to make it in close contact with the area to be welded, ensuring that the welding head can weld along the arc of the blade plate and the turntable surface. Then, the device is adjusted to drive the welding head to move along the arc trajectory of the blade. During the welding process, the welding gun and the welding head generate pulsed current or arc, making the welding area reach the melting point and completing the welding.

[0004] In the actual use process of the existing technology, since the welding head needs to move point by point and complete each welding area during welding, the temperature changes in each area during welding are inconsistent, resulting in heat stress concentration. At the same time, point-by-point welding of the welding head easily leads to uneven welding quality, affecting the consistency and strength of the weld seam, and reducing its working efficiency.

[0005] Therefore, in view of the above technical problems, it is necessary to provide an automatic welding device for water pump turbines. Summary of the Invention

[0006] The purpose of the present invention is to provide an automatic welding device for water pump turbines to solve the above problems.

[0007] To achieve the above purpose, the technical solution provided by the present invention is as follows: An automatic welding device for water pump turbines includes a welding frame, a welding component, and an automatic cooling component. A support frame is fixedly connected to the upper surface of the welding frame. An electric push rod I is installed on the upper surface of the support frame. The output shaft end of the electric push rod I is connected to a welding sleeve. A fixed disk is fixedly connected to the upper surface of the welding frame. A turbine is installed on the upper surface of the fixed disk. The welding component is installed inside the welding sleeve. The welding component includes a partition plate fixedly installed inside the welding sleeve. The partition plate divides the welding sleeve into a motor chamber and a nitrogen gas tank. A plurality of welding guns are installed below the welding sleeve.

[0008] The automatic cooling component is installed inside the welding sleeve. The automatic cooling component includes a limit disk fixedly installed at the bottom of the welding sleeve. A nitrogen chamber is installed inside the limit disk. An air outlet is opened inside the nitrogen chamber. A sealing plug is installed inside the air outlet. A refrigerator is fixedly connected to the top wall of the inner cavity of the nitrogen tank.

[0009] As a further improvement of the present invention, a fixing component is fixedly installed on the upper surface of the welding frame. The fixing component includes an electric push rod two fixedly connected to the upper surface of the welding frame. The output shaft end of the electric push rod two is fixedly connected to a fixing sleeve. A fixing plate is fixedly connected to the outer surface of the fixing sleeve. The height position of the fixing sleeve is controlled by the electric push rod two to ensure that the blade plate and the turntable can be accurately positioned on the fixing disk.

[0010] As a further improvement of the present invention, the fixing component further includes a telescopic rod installed between the fixing sleeve and the welding frame. A plurality of positioning rods are fixedly connected to the upper surface of the fixing disk to play a role in supporting and fixing the fixing sleeve, ensuring its stability and preventing offset or loosening caused by external forces.

[0011] As a further improvement of the present invention, the turbine includes a blade plate installed on the upper surface of the fixing disk. A plurality of positioning grooves are opened inside the blade plate. The number of the positioning rods is the same as that of the positioning grooves. The positioning rods are engaged with the positioning grooves. A connecting sleeve is installed on the upper surface of the blade plate. A turntable is installed on the outer surface of the connecting sleeve. A plurality of support legs are fixedly connected to the bottom of the welding frame. The number of the positioning grooves is the same as that of the positioning rods and they are engaged with each other, ensuring the precise positioning of the blade plate on the fixing disk, reducing the positioning error, and providing a stable support foundation for the whole device through the support legs, ensuring the smoothness and safety during the welding process.

[0012] As a further improvement of the present invention, the automatic cooling component includes a plurality of slide rails installed inside the limit disk. A slider is slidably connected inside the slide rails. The side surface of the slider is connected to the side surface of the sealing plug to play a role in supporting and limiting the welding rod.

[0013] As a further improvement of the present invention, a driving motor is installed on the top wall of the inner cavity of the motor chamber. The output shaft end of the driving motor is fixedly connected to a driving rod through a coupling. A welding disk is fixedly installed at one end of the driving rod. A plurality of welding grooves are opened inside the welding disk. The welding grooves are consistent with the tracks of the blades on the surface of the blade plate, ensuring that the welding head can move along the preset track and realizing high-precision welding operation.

[0014] As a further improvement of the present invention, a welding rod is slidably connected inside the welding groove. One end of the welding rod is connected to a welding gun, and one end of the welding gun is connected to a welding head. One end of the welding rod is connected to the bottom of the slider. By starting the welding machine, the electric arc is transmitted into the welding gun and then to the welding head through the welding gun, so that the surface of the workpiece is melted by the electric arc to complete the welding work.

[0015] As a further improvement of the present invention, a heat insulation layer is installed on the outer surface of the nitrogen gas tank. The heat insulation layer is made of heat insulation material. Through the heat insulation layer, the heat from the outside can be reduced from entering the inside of the nitrogen gas tank, maintaining the low temperature state of the nitrogen gas. Thus, by reducing heat transfer, the working load and energy consumption of the cooler are reduced.

[0016] As a further improvement of the present invention, two nitrogen gas pipes are installed inside the nitrogen gas tank. The other ends of the two nitrogen gas pipes are communicated with the inside of the nitrogen gas chamber. An air pump is installed on the outer surface of the nitrogen gas pipe. An injection pipe is installed on the upper surface of the nitrogen gas tank, and a sealing cover is installed on the outer surface of the injection pipe. By starting the air pump, the cooled nitrogen gas in the nitrogen gas tank is transported to the nitrogen gas chamber through the two nitrogen gas pipes to ensure sufficient supply of cooling gas in the welding area. Through the injection pipe, it is convenient for the staff to supplement nitrogen gas into the nitrogen gas tank to ensure the normal operation of the device. The sealing cover prevents nitrogen gas leakage.

[0017] As a further improvement of the present invention, the sealing plug includes a soft sealing sleeve installed inside it. A hard sealing sleeve is installed on the outer surface of the soft sealing sleeve. The soft sealing sleeve is made of soft sealing material, and the hard sealing sleeve is made of hard sealing material to improve the sealing performance of the sealing plug.

[0018] Compared with the prior art, the advantages of the present invention are as follows: (1) In this solution, the blade plate is placed on the fixed disk, ensuring that the positioning groove on it is fully engaged with the positioning rod on the fixed disk to achieve precise positioning of the blade plate. Then, the connecting sleeve is installed on the blade plate, and then the turntable is aligned with the blade plate and installed to form an integral turbine and placed on the welding rack. Through the mutual cooperation of the second electric push rod, the fixed sleeve and the fixed plate, the turbine can be firmly fixed on the fixed disk, and the stability of the fixed plate and the fixed sleeve is improved through the telescopic rod to ensure that the position remains unchanged during the entire welding process, reducing the possibility of deviation or loosening during welding and improving the consistency and reliability of welding; (2) The welding assembly is driven by the first electric push rod to move up and down, enabling the welding head to accurately reach the area to be welded. Then, through the mutual cooperation of the driving motor and the driving rod, the welding disk is driven to rotate, prompting the welding rod to move along the arc trajectory of the welding groove. At the same time, the welding machine is started for welding work, enabling the welding gun and the welding head to carry out welding work, so that multiple welding areas can be efficiently welded simultaneously, avoiding the low efficiency problem of traditional single-point welding and significantly shortening the production cycle; (3) The driving motor rotates at a low speed initially. When the displacement sensor detects that the welding rod reaches the central axis part of the welding groove, the driving motor is then prompted to rotate at a high speed. The rotation speed is flexibly adjusted according to different stages of welding to ensure a stable and efficient welding process, thereby increasing the welding speed, ensuring the consistency and aesthetics of the weld, and reducing heat stress concentration; (4) The cooler is started to cool the nitrogen in the nitrogen tank. The heat loss can be reduced through the heat insulation layer on the surface of the nitrogen tank to keep the internal nitrogen in a low-temperature state. Subsequently, the cooled nitrogen is transported to the nitrogen chamber through the water pump and the nitrogen pipe. When the driving motor drives the welding rod and the welding gun to move, the slider will move along the slide rail. When the slider moves, it will drive the sealing plug to open the air outlet. At the same time, the sealing performance of the sealing plug can be improved through the mutual cooperation of the soft sealing sleeve and the hard sealing sleeve on the surface of the sealing plug, and the wear caused by the movement of the sealing plug can be reduced to ensure that the sealing plug can always block the air outlet; (5) Further, the cooled nitrogen entering the nitrogen chamber is blown towards the welding area through the air outlet. The heat in the welding area can be quickly removed by the cooled nitrogen, preventing material deformation or oxidation problems caused by overheating. By evenly distributing the cooled nitrogen in the welding area, it can ensure that each welding point can be properly cooled, avoiding local overcooling or overheating phenomena; (6) At the same time, the cooled nitrogen in the nitrogen tank can conduct convective cooling on the driving motor in the motor chamber, reducing the risk of damage caused by overheating of the driving motor. The nitrogen can form a protective atmosphere on the surface of the turbine, effectively isolating the welding area from contact with the outside air, preventing oxidation, ensuring that the weld is pure and free of impurities, improving the welding quality, preventing cracks or other thermal damages in the welding area, reducing the generation of brittle phases caused by the turbine, and improving its strength and toughness. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the side view of the overall structure of the present invention; Figure 3 is the exploded view of the overall structure of the present invention; Figure 4 is the partial structural sectional view of the overall structure of the present invention; Figure 5 For the present invention Figure 5 is the enlarged view of the structure at A in; Figure 6 is the exploded view of the partial structure of the welding assembly of the present invention; Figure 7 is the structural sectional view of the limit disc of the present invention; Figure 8 is the side view of the structure during the overall welding of the present invention; Figure 9 is the partial structural sectional view during the welding of the welding assembly of the present invention; Figure 10 is the partial structural sectional view of the welding disc of the present invention; Figure 11 is the partial structural sectional view of the automatic cooling assembly of the present invention.

[0020] Explanation of the reference numerals in the figure: 1. Welding frame; 101. Support frame; 102. Electric push rod 1; 103. Support leg; 104. Turbine; 1041. Blade plate; 1042. Turntable; 1043. Connecting sleeve; 1044. Positioning groove; 2. Fixing assembly; 201. Electric push rod 2; 202. Telescopic rod; 203. Fixing sleeve; 204. Fixing plate; 205. Fixing disc; 206. Positioning rod; 3. Welding assembly; 301. Welding sleeve; 302. Driving motor; 303. Driving rod; 304. Welding disc; 305. Welding groove; 306. Welding rod; 307. Welding gun; 308. Welding head; 309. Limit disc; 3091. Slide rail; 3092. Slide block; 4. Automatic cooling assembly; 401. Nitrogen tank; 402. Refrigerator; 403. Sealing plug; 4031. Soft sealing sleeve; 4032. Hard sealing sleeve; 404. Nitrogen chamber; 4041. Air outlet; 405. Nitrogen pipe; 4051. Air pump; 406. Injection pipe; 407. Heat insulation layer; 408. Motor chamber. Detailed implementation manners

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention. Embodiment

[0022] Please refer to Figures 1 - 11 , a water pump turbine automatic welding device, including a welding frame 1, a welding assembly 3 and an automatic cooling assembly 4. A support frame 101 is fixedly connected to the upper surface of the welding frame 1. An electric push rod 102 is installed on the upper surface of the support frame 101. The output shaft end of the electric push rod 102 is connected to a welding sleeve 301. A fixed disk 205 is fixedly connected to the upper surface of the welding frame 1. A turbine 104 is installed on the upper surface of the fixed disk 205.

[0023] Specifically, the welding assembly 3 is installed inside the welding sleeve 301. The welding assembly 3 includes a partition plate fixedly installed inside the welding sleeve 301. The partition plate divides the welding sleeve 301 into a motor chamber 408 and a nitrogen gas tank 401. A plurality of welding guns 307 are installed below the welding sleeve 301. A fixing assembly 2 is fixedly installed on the upper surface of the welding frame 1. The fixing assembly 2 includes an electric push rod 201 fixedly connected to the upper surface of the welding frame 1. The output shaft end of the electric push rod 201 is fixedly connected to a fixing sleeve 203. A fixing plate 204 is fixedly connected to the outer surface of the fixing sleeve 203.

[0024] The fixing assembly 2 further includes a telescopic rod 202 installed between the fixing sleeve 203 and the welding frame 1. A plurality of positioning rods 206 are fixedly connected to the upper surface of the fixed disk 205. The turbine 104 includes a blade plate 1041 installed on the upper surface of the fixed disk 205. A plurality of positioning grooves 1044 are opened inside the blade plate 1041. The number of positioning rods 206 is the same as that of the positioning grooves 1044. The positioning rods 206 are engaged with the positioning grooves 1044. A connecting sleeve 1043 is installed on the upper surface of the blade plate 1041. A turntable 1042 is installed on the outer surface of the connecting sleeve 1043. A plurality of support legs 103 are fixedly connected to the bottom of the welding frame 1. One end of the welding rod 306 is connected to the bottom of the slider 3092.

[0025] The inner cavity top wall of the motor chamber 408 is installed with a driving motor 302. The output shaft end of the driving motor 302 is fixedly connected with a driving rod 303 through a coupling. One end of the driving rod 303 is fixedly installed with a welding disc 304. A plurality of welding grooves 305 are formed inside the welding disc 304. The welding grooves 305 are consistent with the tracks of the blades on the surface of the blade plate 1041. A welding rod 306 is slidably connected inside the welding groove 305. One end of the welding rod 306 is connected with a welding gun 307. One end of the welding gun 307 is connected with a welding head 308. A displacement sensor is installed inside the turning point of the welding groove 305. The position reached by the welding rod 306 can be monitored in real time through the displacement sensor. When the welding rod 306 reaches the central axis position of the welding groove 305, start the driving motor 302 and adjust the rotation speed according to the preset parameters.

[0026] Further, start the second electric push rod 201 to drive the fixed sleeve 203 to move downward, so that the fixed sleeve 203 and the fixed plate 204 are in contact with the surface of the turntable 1042, forming a stable fixed state. Start the first electric push rod 102 to drive the welding assembly 3 and the automatic cooling assembly 4 to move downward. When the welding head 308 is about to reach the welding area, start the welding machine to transmit the electric arc through the welding gun 307 into the welding head 308 until the welding head 308 is completely attached to the area to be welded on the surface of the turbine 104. Then turn off the first electric push rod 102 and start the driving motor 302. The driving motor 302 drives a plurality of driving rods 303 to rotate slowly. When the driving rod 303 rotates, it will drive the welding disc 304 to rotate. When the welding disc 304 rotates, it will cause the welding rod 306 to move along the arc track of the welding groove 305. At the same time, start the welding head 308 to perform the welding work, so that the welding work on multiple welding areas on the surface of the turbine 104 can be started. When the displacement sensor detects that the welding rod 306 reaches the central axis of the welding groove 305, the driving motor will rotate quickly, so as to ensure that the welding head 308 can stably contact the surface of the turbine 104 for precise welding. Embodiment

[0027] Refer to Figures 1 - 11 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment, and the automatic cooling assembly 4 is installed inside the welding sleeve 301.

[0028] Specifically, the automatic cooling component 4 includes a limit plate 309 fixedly mounted on the bottom of the welding sleeve 301, a nitrogen chamber 404 is installed inside the limit plate 309, an exhaust port 4041 is opened inside the nitrogen chamber 404, a sealing plug 403 is installed inside the exhaust port 4041, and a refrigerator 402 is fixedly connected to the top wall of the inner cavity of the nitrogen box 401. The refrigerator 402 generally refers to a device for cooling a medium in a specific system. By starting the refrigerator 402, the refrigerator 402 cools the nitrogen in the nitrogen box 401. To a lower temperature in order to provide the necessary cooling effect for the welding process and protect the welding area from oxidation, the automatic cooling component 4 includes a plurality of slide rails 3091 installed inside the limit plate 309, and the internal sliding connection of the slide rail 3091 is connected with a slider 3092, and the side of the slider 3092 is connected to the side of the sealing plug 403. The sealing plug 403 is used to control the flow of nitrogen to ensure that the cooling nitrogen can be accurately delivered to the welding area during the welding process, and the exhaust port 4041 is opened or closed by moving the sealing plug 403.

[0029] An insulation layer 407 is installed on the outer surface of the nitrogen box 401. The insulation layer 407 is made of insulation material. The insulation layer 407 is a material or structure used to reduce heat transfer. It is usually covered on the surface of the object that needs insulation to reduce the impact of the external environment on the internal temperature. The insulation layer 407 reduces the heat transferred from the external environment to the nitrogen box 401 and maintains the low temperature of the internal nitrogen. It can be replaced by insulation materials such as vacuum insulation panels and glass fiber wool. Two nitrogen pipes 405 are installed inside the nitrogen box 401. The other ends of the two nitrogen pipes 405 are connected to the interior of the nitrogen chamber 404. An air pump 4051 is installed on the outer surface of the nitrogen pipe 405. The air pump 4051 is responsible for pumping the cooled nitrogen from the nitrogen box 401 into the nitrogen chamber 404, and further distributing it to the welding area to ensure a continuous supply of nitrogen. The air pump 4051 can be replaced by equipment such as a small air compressor.

[0030] An injection pipe 406 is installed on the upper surface of the nitrogen box 401, and a sealing cover is installed on the outer surface of the injection pipe 406. Nitrogen is an inert gas and is used as a protective atmosphere during the welding process to prevent the welding area from contacting with oxygen in the air and avoid oxidation. At the same time, the cooled nitrogen can be used as a cooling medium to quickly take away the heat during the welding process, reduce thermal stress and deformation, and can be replaced by argon. The nitrogen chamber 404 is a closed space for distributing the nitrogen cooled by the refrigerator 402 so that it can be evenly distributed to various areas that need cooling during the welding process.

[0031] The sealing plug 403 includes a soft sealing sleeve 4031 installed inside it. The outer surface of the soft sealing sleeve 4031 is installed with a hard sealing sleeve 4032. The soft sealing sleeve 4031 is made of a soft sealing material, and the hard sealing sleeve 4032 is made of a hard sealing material. The soft sealing sleeve 4031 has good elasticity and sealing performance. Through the soft sealing sleeve 4031, the tiny gaps between the hard sealing sleeve 4032 and the contact surface can be filled to ensure a tight fit and prevent leakage. It can be replaced by polyurethane or fluororubber. The hard sealing sleeve 4032 is usually made of rigid materials such as metal or hard plastic, with high strength and wear resistance, preventing it from undergoing excessive deformation or damage during use. Thus, through the mutual cooperation of the soft sealing sleeve 4031 and the hard sealing sleeve 4032, the tiny displacement and deformation of the sealing plug 403 during movement can be prevented, and its sealing effect can be maintained.

[0032] Furthermore, start the cooler 402 to cool the nitrogen in the nitrogen tank 401, and through transmissive cooling, the drive motor 302 in the motor chamber 408 can be cooled down. Start the air pump 4051 to pump the nitrogen in the nitrogen tank 401 into the nitrogen chamber 404 through the nitrogen pipe 405, so that the cooled nitrogen is continuously delivered into the nitrogen chamber 404. When the welding rod 306 moves, it will drive the slider 3092 to slide along the slide rail 3091. When the slider 3092 moves, the sealing plug 403 moves, so that when the sealing plug 403 moves, it can open multiple air vents 4041 in the nitrogen chamber 404, allowing the cooled nitrogen to enter multiple welding areas to cool multiple welding areas simultaneously and avoid their thermal deformation.

[0033] The working principle of the present invention: During welding, place the blade plate 1041 on the fixed disk 205 to ensure that the positioning groove 1044 on it is completely engaged with the positioning rod 206 on the fixed disk 205, thereby achieving the precise positioning of the blade plate 1041. Then install the connecting sleeve 1043 on the blade plate 1041, and then align the turntable 1042 with the blade plate 1041 and install it, so as to place the entire turbine 104 on the welding rack 1. Subsequently, start the second electric push rod 201 to drive the fixed sleeve 203 to move downward, so that the fixed sleeve 203 and the fixed plate 204 are in contact with the surface of the turntable 1042 to form a stable fixed state. At the same time, when the fixed sleeve 203 moves, it will drive the telescopic rod 202 to perform telescopic motion to support the fixed sleeve 203 and ensure that it does not shift or loosen during the entire welding process.

[0034] At this time, start the first electric push rod 102 to drive the welding assembly 3 and the automatic cooling assembly 4 to move downward. When the welding head 308 is about to reach the welding area, start the welding machine. The welding machine ionizes the air by applying a high voltage to form a conductive channel, and converts electrical energy into heat energy through the flow of current, thus forming an arc. The arc is transmitted into the welding head 308 through the welding gun 307. In the constant current or constant voltage mode provided by the welding power supply, ensure that the arc length and temperature remain stable, so that the welding head 308 maintains the required welding state. When the welding head 308 is completely fitted with the area to be welded on the surface of the turbine 104, turn off the first electric push rod 102, and at the same time quickly start the drive motor 302. The drive motor 302 drives a plurality of drive rods 303 to rotate slowly. When the drive rods 303 rotate, they will drive the welding disc 304 to rotate. When the welding disc 304 rotates, it will cause the welding rod 306 to move along the arc trajectory of the welding groove 305, and start the welding work on multiple welding areas on the surface of the turbine 104.

[0035] When the welding rod 306 moves, it will drive the welding gun 307 and the welding head 308 to weld the welding area, realizing full circumferential welding. Further, in the initial stage of welding, the drive motor 302 should rotate at a speed with a lower curvature, which helps the welding head 308 to smoothly contact the surface of the workpiece, form a good starting welding point, and be detected by the displacement sensor installed in the welding groove 305. When the welding rod 306 reaches the central axis of the welding groove 305, the drive motor rotates quickly, so as to ensure that the welding head 308 can smoothly contact the surface of the turbine 104 for precise welding.

[0036] At the same time, start the cooler 402 to cool the nitrogen in the nitrogen tank 401, and through transmissive cooling, the drive motor 302 in the motor chamber 408 can be cooled down, avoiding damage to the drive motor 302 caused by a large amount of heat generated during continuous operation, thereby reducing the temperature of the drive motor 302 and increasing the service life of the drive motor 302. Then start the air pump 4051 to pump the nitrogen in the nitrogen tank 401 into the nitrogen chamber 404 through the nitrogen pipe 405, so that the cooled nitrogen is continuously transported into the nitrogen chamber 404, and the heat insulation layer 407 on the surface of the nitrogen tank 401 can reduce the heat from the outside entering the inside of the nitrogen tank 401, thereby maintaining the low temperature characteristics of the nitrogen.

[0037] When the welding rod 306 moves, it will drive the slider 3092 to slide along the slide rail 3091, so as to support and limit the welding rod 306. Furthermore, when the slider 3092 moves, the sealing plug 403 moves, so that when the sealing plug 403 moves, multiple exhaust ports 4041 in the nitrogen chamber 404 can be opened, allowing the cooled nitrogen to enter multiple welding areas, so as to cool the multiple welding areas at the same time to avoid thermal deformation. When the welding rod 306 arrives, the displacement sensor installed at the bend of the welding groove 305 detects that the welding rod 306 has arrived. The drive motor 302 adjusts the rotation speed according to the preset parameters, so that the drive motor 302 rotates rapidly, and the welding disk 304 rotates to prompt the welding rod 306 to move along the welding groove 305, so that the welding head 308 welds the welding area. Then, when welding is completed, the drive motor 302 is turned off, and the cooled nitrogen in the nitrogen chamber 404 passes through the welding groove 305 and the slide rail 3091 to cool the welded area. At the same time, the nitrogen can form a protective atmosphere on the surface of the turbine 104, effectively isolating the welding area from the outside air, preventing the occurrence of oxidation, ensuring that the weld is pure and free of impurities, and improving the welding quality. In this way, multiple welding areas of the turbine 104 blades can be welded at the same time, avoiding the low work efficiency, time and labor caused by traditional single welding. The cooled nitrogen can quickly take away the large amount of heat generated during the welding process, help the welding area to cool down quickly, reduce the accumulation of thermal stress, prevent cracks or other thermal damage in the welding area, and reduce the generation of brittle phases caused by the turbine 104, thereby improving its strength and toughness.

[0038] The drive motor 302 is started to drive the welding gun 307, the welding rod 306 and the slider 3092 to reset. When the slider 3092 is reset, it will drive the sealing plug 403 to block the exhaust port 4041, and improve its sealing performance through the soft sealing sleeve 4031 and the hard sealing sleeve 4032 on the surface of the sealing plug 403 to prevent nitrogen leakage. Then the electric push rod 102 is started to drive the welding sleeve 301 and the welding gun 307 to move upward, so that the welding gun 307 is away from the turbine 104. Then the electric push rod 201 is started to drive the fixed sleeve 203 and the fixed plate 204 to move upward, so that the fixed plate 204 is away from the turbine 104, so that the staff can take out the turbine 104 and place another turbine 104 on the fixed disk 205 before carrying out the welding work.

[0039] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0040] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic welding device for a water pump turbine, characterized in that: Including: A welding frame (1), on the upper surface of the welding frame (1) is fixedly connected with a support frame (101), on the upper surface of the support frame (101) is installed a first electric push rod (102), the output shaft end of the first electric push rod (102) is connected with a welding sleeve (301), on the upper surface of the welding frame (1) is fixedly connected with a fixed disk (205), and on the upper surface of the fixed disk (205) is installed a turbine (104); A welding component (3), installed inside the welding sleeve (301), the welding component (3) includes a partition plate fixedly installed inside the welding sleeve (301), the partition plate divides the welding sleeve (301) into a motor chamber (408) and a nitrogen gas tank (401), and a plurality of welding guns (307) are installed below the welding sleeve (301); An automatic cooling component (4), installed inside the welding sleeve (301), the automatic cooling component (4) includes a limit disk (309) fixedly installed at the bottom of the welding sleeve (301), inside the limit disk (309) is installed a nitrogen gas chamber (404), inside the nitrogen gas chamber (404) is provided with an air outlet (4041), inside the air outlet (4041) is installed a sealing plug (403), and the inner cavity top wall of the nitrogen gas tank (401) is fixedly connected with a refrigerator (402).

2. The automatic welding device for a water pump turbine according to claim 1, characterized in that: On the upper surface of the welding frame (1) is fixedly installed a fixing component (2), the fixing component (2) includes a second electric push rod (201) fixedly connected to the upper surface of the welding frame (1), the output shaft end of the second electric push rod (201) is fixedly connected with a fixing sleeve (203), and on the outer surface of the fixing sleeve (203) is fixedly connected with a fixing plate (204).

3. The automatic welding device for a water pump turbine according to claim 2, wherein: The fixing component (2) further includes a telescopic rod (202) installed between the fixing sleeve (203) and the welding frame (1), and a plurality of positioning rods (206) are fixedly connected to the upper surface of the fixed disk (205).

4. The automatic welding device for a water pump turbine according to claim 3, characterized in that: The turbine (104) includes a blade plate (1041) installed on the upper surface of the fixed disk (205), inside the blade plate (1041) are provided with a plurality of positioning grooves (1044), the number of the positioning rods (206) is the same as that of the positioning grooves (1044), the positioning rods (206) are engaged with the positioning grooves (1044), on the upper surface of the blade plate (1041) is installed a connecting sleeve (1043), on the outer surface of the connecting sleeve (1043) is installed a turntable (1042), and a plurality of support legs (103) are fixedly connected to the bottom of the welding frame (1).

5. The automatic welding device for a water pump turbine according to claim 1, characterized in that: The automatic cooling component (4) includes a plurality of slide rails (3091) installed inside the limit disk (309), inside the slide rails (3091) is slidably connected with a slider (3092), and the side surface of the slider (3092) is connected with the side surface of the sealing plug (403).

6. The automatic welding device for a water pump turbine according to claim 4, characterized in that: A driving motor (302) is installed on the inner cavity top wall of the motor chamber (408). The output shaft end of the driving motor (302) is fixedly connected with a driving rod (303) through a coupling. One end of the driving rod (303) is fixedly installed with a welding disc (304). A plurality of welding grooves (305) are formed inside the welding disc (304). The welding grooves (305) are consistent with the tracks of the blades on the surface of the blade plate (1041).

7. An automatic welding device for a water pump turbine according to claim 6, characterized in that: A welding rod (306) is slidably connected inside the welding groove (305). One end of the welding rod (306) is connected with a welding gun (307). One end of the welding gun (307) is connected with a welding head (308). One end of the welding rod (306) is connected with the bottom of the slider (3092).

8. The automatic welding device for a water pump turbine according to claim 1, characterized in that: A heat preservation layer (407) is installed on the outer surface of the nitrogen gas tank (401). The heat preservation layer (407) is made of heat preservation materials.

9. The automatic welding device for a water pump turbine according to claim 1, characterized in that: Two nitrogen gas pipes (405) are installed inside the nitrogen gas tank (401). The other ends of the two nitrogen gas pipes (405) are communicated with the inside of the nitrogen gas chamber (404). An air pump (4051) is installed on the outer surface of the nitrogen gas pipe (405). An injection pipe (406) is installed on the upper surface of the nitrogen gas tank (401). A sealing cover is installed on the outer surface of the injection pipe (406).

10. The automatic welding device for a water pump turbine according to claim 1, characterized in that: The sealing plug (403) includes a soft sealing sleeve (4031) installed inside it. A hard sealing sleeve (4032) is installed on the outer surface of the soft sealing sleeve (4031). The soft sealing sleeve (4031) is made of soft sealing materials. The hard sealing sleeve (4032) is made of hard sealing materials.

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