Welding equipment for inner container of water heater

Abstract

The invention relates to the technical field of water heater production, and particularly discloses water heater inner container welding equipment which comprises a supporting mechanism, a driving mechanism is arranged on the supporting mechanism, two transmission mechanisms are symmetrically arranged on the driving mechanism, one transmission mechanism is fixed to the driving mechanism, and the other transmission mechanism is arranged on the driving mechanism in a sliding mode. The two transmission mechanisms are each provided with a clamping mechanism, and the driving mechanism is further provided with two limiting mechanisms. According to the water heater inner container welding equipment, after the workpieces are welded, the welded workpieces can be pushed to be discharged through movement of the fixing plate, meanwhile, the workpieces which are not welded are pushed to the welding position, continuous feeding and discharging are achieved, and therefore the welding efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of water heater manufacturing technology, specifically to a welding device for the inner tank of a water heater. Background Technology

[0002] An electric water heater is a water heater that uses electricity as its energy source for heating. It is one of the three major types of water heaters, alongside gas water heaters and solar water heaters. Electric water heaters can be classified into three types according to their heating power: storage type (also known as tank type or thermal storage type), instantaneous type, and quick-heating type (also known as semi-storage type). Storage-type electric water heaters can be further divided into wall-mounted (horizontal) and floor-standing (vertical) water heaters according to their installation method. Wall-mounted electric water heaters typically have a capacity of 40L-100L, while floor-standing water heaters typically have a capacity of over 100L. The most important component of a storage-type electric water heater is the inner tank. Currently, large-capacity electric water heaters are usually equipped with two inner tanks. In the production process of double-tank water heaters, welding equipment is required to weld the connection between the two inner tanks.

[0003] Chinese patent application CN219170005U discloses a welding device for a double-tank water heater. This welding device includes a welding assembly and a fixed support assembly. The welding assembly includes a welding robot and a positioning electrode structure fixed in relative positions. The positioning electrode structure can extend into the first inner tank to correspond to a connecting pipe. The welding robot includes a detachably connected robot body and a welding torch. The robot body can drive the welding torch to extend into the second inner tank. The welding torch is configured to weld the connecting pipe to the inner wall of the second inner tank. The fixed support assembly supports and fixes the double-tank assembly so that the second inlet of the second inner tank faces the welding assembly and allows the second inner tank to abut against the connecting pipe.

[0004] However, the structural design of the aforementioned technologies, although enabling the welding of the two inner liner from the inside of the second inner liner, requires removing the welded inner liner after welding and then joining the two unwelded inner liner together before the next welding operation can be performed. This makes continuous welding inconvenient and affects production efficiency. Summary of the Invention

[0005] This invention provides a welding device for the inner tank of a water heater, which aims to solve the problem of inconvenience in continuous welding in related technologies.

[0006] The water heater inner tank welding equipment of the present invention includes a support mechanism, a driving mechanism on the support mechanism, two transmission mechanisms symmetrically arranged on the driving mechanism, one transmission mechanism being fixed on the driving mechanism and the other transmission mechanism being slidably arranged on the driving mechanism, a clamping mechanism on both transmission mechanisms, and two limiting mechanisms on the driving mechanism. The transmission mechanism includes two transmission components arranged vertically and an upper and lower, and a support base mounted on the two transmission components; the transmission components include a mounting cover, two gears rotatably connected in the mounting cover, and a toothed belt meshing with the two gears, and a clamping mechanism is arranged on the toothed belt in the two transmission components; The clamping mechanism includes multiple clamping components 1 and multiple clamping components 2 disposed on the toothed belt. Each clamping component 1 and clamping component 2 is provided with a movable component. Each clamping component 2 is located between each two adjacent clamping components 1. The clamping component 1 includes a fixed plate disposed on the toothed belt. The movable component includes a movable plate that is elastically slidably connected to the fixed plate. The movable plate is provided with multiple insertion holes for the limiting mechanism to be inserted.

[0007] When welding a workpiece, the workpiece is first placed in the support base. Then, the gear drives clamping components one and two to move along the track of the gear belt. During the movement, the fixed plate in clamping component one pushes the workpiece towards the welding position. When the workpiece reaches the welding position, the movable plate in clamping component two is limited by the limiting mechanism, causing the movable plate to stop moving. Then, the gear belt continues to move, thereby driving the fixed plates in clamping components one and two to continue moving. At this time, the fixed plate in clamping component one and the movable plate in clamping component two clamp both ends of the workpiece. Then, one of the transmission mechanisms moves closer to the other to align the two workpieces for welding. After welding one side, the two transmission mechanisms drive the workpiece to flip to continue welding. After the workpiece is flipped, the unwelded workpieces are placed into the support bases of the two transmission mechanisms. After the workpiece is welded, the movement of the fixed plate can push the welded workpiece out of the machine and push the unwelded workpieces to the welding position, thus achieving continuous loading and unloading and improving welding efficiency.

[0008] Preferably, the transmission mechanism further includes two rotating shafts, which are rotatably connected between the mounting covers of the two transmission components, and two gears in the transmission components are respectively mounted on the outer side of one end of the two rotating shafts.

[0009] Preferably, each of the clamping components 2 is located between every two adjacent clamping components 1. Between every two adjacent clamping components 1, the clamping component 2 is positioned close to one of the clamping components 1. The clamping components 1 and clamping components 2 have the same structure.

[0010] By setting different spacings between clamping component 2 and the two adjacent clamping components 1, two workpieces of different lengths can be continuously placed in two positions without having to reset the equipment after the workpiece welding is completed, thereby improving loading and unloading efficiency and further improving welding efficiency.

[0011] Preferably, the drive mechanism includes a motor mounted on a support mechanism, a mounting assembly mounted on the output shaft of the motor, an adjustment assembly mounted at the bottom of one side of the mounting assembly, and a sliding assembly mounted at the top of one side of the adjustment assembly, with both transmission mechanisms disposed between the adjustment assembly and the sliding assembly.

[0012] The motor can drive two transmission mechanisms to rotate through the adjustment and sliding components on the mounting assembly, thereby rotating the two clamped workpieces to facilitate welding.

[0013] Preferably, the adjustment assembly includes a mounting plate, a lead screw, a threaded block, a fixed block, and a movable block. The mounting plate is mounted on a mounting frame, the lead screw is rotatably connected inside the mounting plate, the fixed block is mounted on the top of the threaded block, the movable block is mounted on one side of the threaded block, the threaded block is threadedly connected to the lead screw, one of the limiting mechanisms is mounted on one side of the mounting plate, and the other limiting mechanism is mounted on the movable block.

[0014] Preferably, the sliding assembly includes a mounting base, a second slider, and a connecting block. The mounting base is mounted on a mounting frame, the second slider is slidably connected inside the mounting base, and the connecting block is mounted on the bottom of the second slider. The top and bottom of one of the transmission mechanisms are respectively mounted on the mounting base and the mounting plate, and the bottom and top of the other transmission mechanism are respectively mounted on the fixing block and the connecting block.

[0015] The lead screw can drive the transmission mechanism connected to the fixed block to move through the fixed block on the threaded block, thereby driving the two workpieces to dock with each other.

[0016] Preferably, the limiting mechanism includes an electric telescopic rod, a lifting plate, and two rows of limiting components. In the two limiting mechanisms, the electric telescopic rod is respectively installed on the mounting plate and the movable block. The movable end of the electric telescopic rod is installed on the lifting plate. The number of limiting components is equal to the number of holes on the movable plate. The limiting component includes a limiting rod, a second spring, and a limiting plate. The limiting rod is slidably connected to the lifting plate in a vertical direction. The limiting plate is installed at one end of the limiting rod. The second spring is sleeved on the outside of the limiting rod, and both ends of the second spring are fixedly installed on the lifting plate and the limiting plate, respectively. The insertion hole is adapted to the limiting rod.

[0017] The electric telescopic rod can move the limit rod downward through the lifting plate. When the limit rod is inserted into the hole, the moving plate can be restricted from continuing to move by the blocking of the limit rod.

[0018] The beneficial effects of the present invention, achieved by adopting the above technical solution, are as follows: the two ends of the workpiece are clamped by the fixed plate in clamping assembly one and the movable plate in clamping assembly two, and then one of the transmission mechanisms moves closer to the other to make the two workpieces dock, so as to facilitate welding of the workpieces. After welding one side, the two transmission mechanisms drive the workpiece to flip and continue welding. After the workpiece is flipped, the unwelded workpieces are placed into the support seats of the two transmission mechanisms respectively. After the workpieces are welded, the movement of the fixed plate can push the welded workpieces out of the material, and at the same time push the unwelded workpieces to the welding position to achieve continuous loading and unloading, thereby improving welding efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the welding equipment for the inner tank of a water heater, according to a specific embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the support mechanism structure in a specific embodiment of the present invention.

[0021] Figure 3 This is a structural schematic diagram of the transmission mechanism in use according to a specific embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the limiting mechanism structure in a specific embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the internal structure of the adjustment component in a specific embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of the transmission assembly in a specific embodiment of the present invention.

[0025] Figure 7 This is a schematic diagram of the clamping mechanism in a specific embodiment of the present invention.

[0026] Figure 8 This is a schematic diagram of the water storage tank in a specific embodiment of the present invention.

[0027] Figure 9 This is a schematic diagram of the upper and lower bladders in a specific embodiment of the present invention.

[0028] Figure 10 This is a schematic diagram of the internal structure of the lower chamber in a specific embodiment of the present invention.

[0029] Figure label: 10. Support mechanism; 11. Base plate; 12. Support frame; 13. Support ring; 14. Guide rail; 15. Slider 1; 20. Drive mechanism; 21. Motor 1; 22. Mounting assembly; 221. Mounting bracket; 222. Rotating shaft; 223. Bearing housing; 23. Adjustment assembly; 231. Mounting plate; 232. Motor 2; 233. Lead screw; 234. Threaded block; 235. Fixed block; 236. Moving block; 24. Sliding assembly; 241. Mounting base; 242. Guide rod; 243. Slider 2; 244. Connecting block; 30. Transmission mechanism; 31. Transmission assembly; 311. Mounting cover; 312. Gear; 313. Toothed belt; 32. Motor; 33. Support base; 34. Rotating shaft; 40. Clamping mechanism; 41. Clamping component one; 411. Fixing plate; 412. Mounting block; 413. Slide rod; 414. Spring one; 42. Movable component; 421. Movable plate; 422. Insertion hole; 43. Clamping component two; 50. Limiting mechanism; 51. Electric telescopic rod; 52. Lifting plate; 53. Limiting rod; 54. Spring II; 55. Limiting plate; 60. Inner water tank; 61. Lower tank; 62. Upper tank; 63. Connecting water pipe; 64. Exchange hole. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] like Figures 1 to 7 As shown, the water heater inner tank welding equipment of the present invention includes a support mechanism 10, a drive mechanism 20, a transmission mechanism 30, a clamping mechanism 40, and a limiting mechanism 50. The drive mechanism 20 is mounted on the support mechanism 10. There are two transmission mechanisms 30, symmetrically arranged on the drive mechanism 20, with a water storage inner tank 60 positioned between them. There are two sets of clamping mechanisms 40, each set disposed inside one of the two transmission mechanisms 30 to clamp the water storage inner tank 60. There are two limiting mechanisms 50, both mounted on the drive mechanism 20.

[0032] During the welding of the water storage tank 60, two sets of clamping mechanisms 40 are first driven by two transmission mechanisms 30 to move around the trajectory of the transmission mechanisms 30. During the movement, the clamping mechanisms 40 push the water storage tank 60 to the welding position. After moving to the welding position, the clamping mechanisms 40 are limited by the limiting mechanism 50, so that the clamping mechanisms 40 can clamp the water storage tank 60. After the water storage tank 60 is clamped, the welding robot welds the upper and lower straight lines at the joint of the water storage tank 60.

[0033] After one side of the water storage liner 60 is welded, the drive mechanism 20 drives the two transmission mechanisms 30 to rotate to weld the other side of the water storage liner 60. During the welding process, another water storage liner 60 to be welded can be placed between the two transmission mechanisms 30 by manual labor or external conveying machinery. After the water storage liner 60 is welded, the clamping mechanism 40 pushes the welded water storage liner 60 out of the transmission mechanism 30, and at the same time pushes the unwelded water storage liner 60 to the welding position, which facilitates continuous welding and automatic feeding.

[0034] like Figures 1 to 2 As shown, the support mechanism 10 includes a base plate 11, a support frame 12, a support ring 13, guide rails 14, and sliders 15. The support frame 12 is installed on one side of the top of the base plate 11, and the support ring 13 is installed on the other side of the top of the base plate 11. An annular groove is formed on the inner side of the support ring 13. There are two guide rails 14, which are distributed vertically and located on the inner side of the support ring 13. In addition, two transmission mechanisms 30 are disposed between the two guide rails 14. There are four sliders 15, which are respectively installed on both sides of the two guide rails 14. The outer side of each slider 15 has an arc surface and is slidably connected to the annular groove in the support ring 13.

[0035] When the transmission mechanism 30 rotates, it drives the slider 15 on the guide rail 14 to slide in the annular groove of the support ring 13.

[0036] like Figures 1 to 5 As shown, the drive mechanism 20 includes a motor 21, a mounting assembly 22, an adjusting assembly 23, and a sliding assembly 24. The motor 21 is mounted on the top of the support frame 12, and the mounting assembly 22 is mounted on the motor 21. The adjusting assembly 23 is located at the bottom of one side of the mounting assembly 22, and the sliding assembly 24 is located at the top of one side of the adjusting assembly 23. Both transmission mechanisms 30 are located between the adjusting assembly 23 and the sliding assembly 24, and the guide rail 14 and the sliding assembly 24 have the same structure.

[0037] When it is necessary to rotate the water storage tank 60, the motor 21 drives the adjustment component 23 and the sliding component 24 to rotate through the mounting component 22. At this time, the adjustment component 23 and the sliding component 24 drive the two transmission mechanisms 30 to rotate. When the transmission mechanism 30 rotates, it drives the water storage tank 60 to rotate through the clamping mechanism 40 on it.

[0038] like Figure 1 and Figures 4 to 5As shown, the mounting assembly 22 includes a mounting bracket 221, a rotating shaft 222, and a bearing housing 223. The rotating shaft 222 is mounted on the middle of one side of the mounting bracket 221, and a bearing is housed inside the bearing housing 223. The rotating shaft 222 is installed in the inner ring of the bearing, and the bearing housing 223 is mounted on the top of the support frame 12. One end of the rotating shaft 222 is connected to the output shaft of the motor 21, and two transmission mechanisms 30 are symmetrically distributed about the axis of the rotating shaft 222. The adjusting assembly 23 is located at the bottom of the other side of the mounting bracket 221, and the sliding assembly 24 is located at the top of the other side of the mounting bracket 221.

[0039] like Figures 3 to 5 As shown, the adjustment assembly 23 includes a mounting plate 231, a second motor 232, a lead screw 233, a threaded block 234, a fixed block 235, and a movable block 236. The mounting plate 231 is mounted on the bottom side of one side of the mounting bracket 221, and the second motor 232 is mounted on one side of the mounting plate 231. One end of the lead screw 233 is rotatably connected to one side of the inner wall of the mounting plate 231, and the other end of the lead screw 233 is connected to the output shaft of the second motor 232. The fixed block 235 is mounted on the top of the threaded block 234, and the movable block 236 is mounted on one side of the threaded block 234. The threaded block 234 is threadedly connected to the lead screw 233. A groove for sliding the fixed block 235 is provided on the top of the mounting plate 231, and a groove for sliding the movable block 236 is provided on one side of the mounting plate 231. One limiting mechanism 50 is mounted on one side of the mounting plate 231, and the other limiting mechanism 50 is mounted on the movable block 236.

[0040] like Figure 1 and Figures 3 to 5 As shown, the sliding assembly 24 includes a mounting base 241, a guide rod 242, a second slider 243, and a connecting block 244. The mounting base 241 is mounted on the top side of one side of the mounting bracket 221, and the guide rod 242 is mounted inside the mounting base 241. The second slider 243 is slidably connected to the outside of the guide rod 242, and the connecting block 244 is mounted on the bottom of the second slider 243. A groove for sliding the connecting block 244 is provided on the bottom of the mounting base 241. The bottom of one transmission mechanism 30 is mounted on the top side of the mounting plate 231, and the top of another transmission mechanism 30 is mounted on the bottom of the mounting base 241. The bottom of another transmission mechanism 30 is mounted on the top of the fixing block 235, and the top of the other transmission mechanism 30 is mounted on the bottom of the connecting block 244.

[0041] When it is necessary to clamp the water storage tank 60 for docking, the motor 232 drives the fixed block 235 on the threaded block 234 to slide through the lead screw 233, so that one of the transmission mechanisms 30 moves closer to the other transmission mechanism 30 to dock the water storage tank 60, which facilitates subsequent welding.

[0042] like Figure 1 , Figure 3 and Figure 6As shown, the transmission mechanism 30 includes a transmission assembly 31, a motor 32, a support base 33, and a rotating shaft 34. There are two transmission assemblies 31, arranged vertically, with the motor 32 mounted on one of them. There are also two support bases 33, each mounted on one side of one of the two transmission assemblies 31, with an arc-shaped groove on each opposite side of the support base 33 that mates with the water storage tank 60. There are also two rotating shafts 34, rotatably connecting the two transmission assemblies 31.

[0043] like Figure 1 and Figures 3 to 6 As shown, the transmission assembly 31 includes a mounting cover 311, gears 312, and a toothed belt 313. In the two transmission mechanisms 30, the two lower mounting covers 311 are connected to the mounting plate 231 and the fixing block 235, respectively. In the two transmission mechanisms 30, the two upper mounting covers 311 are connected to the mounting base 241 and the connecting block 244, respectively. There are two gears 312 located inside the toothed belt 313, and the gears 312 mesh with the toothed belt 313. A clamping mechanism 40 is provided on the toothed belt 313 in both transmission assemblies 31. The two gears 312 are located on the inner sides of the mounting cover 311, and are respectively mounted on the outer side of one end of the rotating shaft 34. The two ends of the rotating shaft 34 are rotatably connected to the inner top walls of the two mounting covers 311, and a support base 33 is mounted on one side of the mounting cover 311. A motor 32 is mounted on the top of one of the mounting covers 311, and its output shaft is connected to the rotating shaft 34.

[0044] Motor 32 drives gear 312 to rotate via rotating shaft 34. Gear 312 drives clamping mechanism 40 to move around the track of toothed belt 313 via toothed belt 313, so as to push the welded water storage tank 60 and the unwelded water storage tank 60 to move.

[0045] like Figure 1 , Figure 3 and Figure 6 As shown, the clamping mechanism 40 includes a first clamping component 41, a movable component 42, and a second clamping component 43, and there are multiple first clamping components 41, movable components 42, and second clamping components 43. Multiple movable components 42 are respectively disposed on multiple first clamping components 41 and multiple second clamping components 43, and the first clamping components 41 and second clamping components 43 have identical structures. Each second clamping component 43 is located between every two adjacent first clamping components 41, and between every two adjacent first clamping components 41, the second clamping component 43 is positioned close to one of the first clamping components 41 to facilitate clamping water storage inner tanks 60 of different lengths.

[0046] like Figure 3 and Figures 6 to 7As shown, the clamping assembly 41 includes a fixed plate 411, mounting blocks 412, and elastic elements. The fixed plate 411 is T-shaped, and there are two mounting blocks 412. One side of each mounting block 412 is mounted on the toothed belt 313 in the two transmission assemblies 31, and the other side of each mounting block 412 is mounted on the fixed plate 411.

[0047] There are two elastic elements, both of which are installed on one side of the fixed plate 411. The elastic elements include a slide rod 413 and a spring 414. The slide rod 413 is installed on the fixed plate 411, the movable component 42 is slidably connected to the outside of the slide rod 413, and the spring 414 is installed between the fixed plate 411 and the movable component 42.

[0048] Continue to refer to Figure 3 and Figures 6 to 7 As shown, the active component 42 includes an active plate 421, which is slidably connected to two slide rods 413. The bottom of the active plate 421 has multiple insertion holes 422 for the limiting mechanism 50 to be inserted.

[0049] When the water storage tank 60 is clamped, the gear 312 drives the toothed belt 313 to rotate. When the movable plate 421 on the clamping assembly 2 43 corresponds to the limiting mechanism 50, the limiting mechanism 50 is inserted into the movable plate 421 connected to the clamping assembly 2 43. At this time, as the toothed belt 313 rotates, it can drive the fixed plate 411 in the clamping assembly 2 43 to continue to move. At the same time, the fixed plate 411 in the clamping assembly 1 41 gradually moves closer to the movable plate 421 on the clamping assembly 2 43, thereby clamping the water storage tank 60 between the clamping assembly 1 41 and the clamping assembly 2 43, ensuring that the water storage tank 60 can be stably welded.

[0050] like Figures 3 to 5 and Figure 7 As shown, the limiting mechanism 50 includes an electric telescopic rod 51, a lifting plate 52, and limiting members. In the two limiting mechanisms 50, the fixed ends of the electric telescopic rod 51 are respectively mounted on the mounting plate 231 and the movable block 236, while the movable ends of the electric telescopic rod 51 are mounted on the bottom of the lifting plate 52. There are two rows of limiting members, with the number of limiting members in each row equal to the number of insertion holes 422 on the movable plate 421.

[0051] like Figures 3 to 4As shown, the limiting component includes a limiting rod 53, a second spring 54, and a limiting plate 55. The limiting rod 53 is slidably connected to the lifting plate 52. The limiting plate 55 is installed at one end of the limiting rod 53, and the other end of the limiting rod 53 passes through the lifting plate 52 and extends to the outside of the lifting plate 52. A hole is provided on the support base 33 located below for the limiting rod 53 to pass through. In the initial state, the end of the limiting rod 53 away from the limiting plate 55 is located in the hole of the support base 33. The second spring 54 is sleeved on the outside of the limiting rod 53, and one end of the second spring 54 is fixedly installed on the lifting plate 52, while the other end of the second spring 54 is fixedly installed on the limiting plate 55, so as to drive the limiting rod 53 to reset.

[0052] When the movable plate 421 needs to be limited, the electric telescopic rod 51 drives the lifting plate 52 to move upward. The lifting plate 52, through the second spring 54, drives the limiting rods 53 on the limiting plate 55 to pass through the support base 33 located below. As the electric telescopic rod 51 drives the lifting plate 52 to continue moving upward, one row of limiting rods 53 contacts the fixed plate 411. At this time, the fixed plate 411 blocks the limiting rods 53 in contact with it from moving further upward and stretches the second spring 54. At the same time, the other row of limiting rods 53 contacts the movable plate 421 and inserts into the insertion hole 422. When the limiting rods 53 enter the insertion hole 422, the limiting rods 53 can prevent the movable plate 421 from continuing to move with the fixed plate 411, so as to clamp both ends of the water storage tank 60.

[0053] When the movable plate 421 needs to move with the fixed plate 411, the electric telescopic rod 51 drives the lifting plate 52 to move down. The lifting plate 52 drives the limiting rod 53 on the limiting plate 55 to move down through the second spring 54, so that the two rows of limiting rods 53 return to the holes of the support base 33, thereby releasing the limitation on the movable plate 421.

[0054] like Figure 3 and Figures 8 to 10 As shown, the water storage tank 60 includes a lower tank 61, an upper tank 62, and a connecting water pipe 63.

[0055] The top of the lower liner 61 has multiple exchange holes 64, which are evenly spaced along the length of the lower liner 61. In this embodiment, there are three exchange holes 64; in other embodiments, there may be two, four, or more exchange holes 64.

[0056] Multiple exchange holes 64 can replace the traditional multiple connecting pipes, avoiding the problem of increased spacing between the upper tank 62 due to the need to reserve space for the installation of connecting pipes. Therefore, there is no need to expand the outer shell to accommodate the connecting pipes, effectively reducing the overall size of the electric water heater and improving space adaptability.

[0057] The lower tank 61 is longer than the upper tank 62. The lower tank 61 is the main water storage chamber and has a built-in main heating element (electric heating tube, etc.) to heat the water in the lower tank 61. The upper tank 62 is used to provide additional water storage space.

[0058] The upper tank 62 is installed on the outside of the lower tank 61. The bottom of the upper tank 62 has a groove that matches the outer side of the lower tank 61, allowing for a larger contact area and tighter fit between the two tanks. This results in a stronger connection after welding, effectively reducing the risk of loosening and leakage, and improving the overall structural stability and sealing. Simultaneously, the tight fit between the upper tank 62 and the groove reduces the overall gap between the inner tanks, eliminating the need for additional outer shell expansion. The insulation layer can be more completely filled between the outer shell and the upper tank 62, preventing rapid heat loss due to structural gaps, reducing thermal bridging, improving overall insulation performance, and thus reducing operating energy consumption. The upper tank 62 is connected to the lower tank 61 through an exchange hole 64. There are two connecting water pipes 63, installed on both sides of the bottom of the lower tank 61. These two connecting water pipes 63 serve as the cold water inlet and hot water outlet, respectively. Cold water enters the lower tank 61 through one of the connecting water pipes 63, and is heated by the main heating element to form hot water. The hot water flows out from the other connecting water pipe 63 for the user's use.

[0059] When using the inner water tank 60, it is connected to an external water source via a connecting water pipe 63. The external water source then enters the lower tank 61 through the connecting water pipe 63. Once the lower tank 61 is full, the water in the lower tank 61 flows into the upper tank 62 through the exchange hole 64, gradually filling the upper tank 62. When the water in the lower tank 61 is heated, the water rises to the surface. At this time, the hot water in the lower tank 61 can quickly exchange heat with the water in the upper tank 62 through the exchange hole 64 on the lower tank 61. Simultaneously, the water in the upper tank 62 also exchanges heat with the hot water in the lower tank 61 through the outer wall of the lower tank 61, thereby further improving the heat exchange efficiency between the water in the lower tank 61 and the upper tank 62.

[0060] Working principle: When welding the water storage tank 60, the workers place the lower tank 61 and the upper tank 62 into the support seats 33 of the two transmission mechanisms 30 respectively, and make the exchange hole 64 on the lower tank 61 face the upper tank 62, so that the upper tank 62 can cover the exchange hole 64 on the lower tank 61 during welding, so that the lower tank 61 and the upper tank 62 can be accurately connected when they are moved to the welding position. At this time, the motor 32 is started, and the motor 32 drives the toothed belt 313 to rotate through the gear 312 on the rotating shaft 34.

[0061] During rotation, the toothed belt 313 drives the fixed plate 411 to move around the track of the toothed belt 313 via the mounting block 412. As the fixed plate 411 moves, it pushes the lower liner 61 or the upper liner 62 to move. When both the lower liner 61 and the upper liner 62 reach the welding position, the fixed plate 411 stops moving, aligning the insertion hole 422 on the movable plate 421 and the fixed plate 411 with the limiting rod 53. At this point, the lower liner 61 or the upper liner 62 is located between the fixed plate 411 in clamping assembly one 41 and the movable plate 421 in clamping assembly two 43. Then, the electric telescopic rod 51 drives the limiting rod 53 to move via the lifting plate 52. When the limiting rod 53 contacts the fixed plate 411, the fixed plate 411 prevents the limiting rod 53 from moving further downward. When the limiting rod 53 contacts the movable plate 421, the limiting rod 53 enters the insertion hole 422 and prevents the movable plate 421 from continuing to follow the fixed plate 411. Then, as the toothed belt 313 continues to move, the fixed plate 411, which pushes the lower bladder 61 or the upper bladder 62 to move, continues to move, thereby clamping both ends of the lower bladder 61 or the upper bladder 62.

[0062] After the two ends of the lower tube 61 or the upper tube 62 are clamped, the second motor 232 is started. The second motor 232 drives the fixed block 235 on the threaded block 234 to slide through the lead screw 233, so that one of the transmission mechanisms 30 moves closer to the other transmission mechanism 30, so that the lower tube 61 and the upper tube 62 are tightly connected, which facilitates subsequent welding.

[0063] After one straight line is welded, motor 21 drives the mounting plate 231 and mounting base 241 to rotate via mounting bracket 221, thereby driving the mounting cover 311 to rotate. During the rotation of the mounting cover 311, the lower tank 61 and upper tank 62 are rotated via movable plate 421 and fixed plate 411 to weld another straight line at the joint of the lower tank 61 and upper tank 62. After the lower tank 61 and upper tank 62 have rotated, the unwelded lower tank 61 and upper tank 62 are placed into the support seats 33 of the two transmission mechanisms 30 respectively. After the upper and lower straight lines at the joint of the lower tank 61 and upper tank 62 are welded, the electric telescopic rod 51 drives the limit rod 53 to reset, so that the movable plate 421 is reset. Then, by moving the fixed plate 411, the welded water storage tank 60 can be pushed to unload, while the unwelded lower tank 61 and upper tank 62 are pushed to the welding position to achieve continuous loading and unloading, thereby improving welding efficiency. After the lower liner 61 and upper liner 62 are cut to size, the arcs at both ends of the lower liner 61 and upper liner 62 are welded by a welding robot or manually. When welding the arcs at both ends of the lower liner 61 and upper liner 62, it is not necessary to flip the lower liner 61 and upper liner 62 to perform the welding, so as to achieve continuous welding of the lower liner 61 and upper liner 62.

[0064] During the welding process, by setting different spacings between clamping component 2 43 and two adjacent clamping components 1 41, water storage tanks 60 of different lengths can be clamped, thereby improving loading and unloading efficiency and further improving welding efficiency.

[0065] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A welding device for the inner tank of a water heater, comprising a support mechanism (10), characterized in that, The support mechanism (10) is provided with a drive mechanism (20), and the drive mechanism (20) is provided with two symmetrically arranged transmission mechanisms (30). One transmission mechanism (30) is fixed on the drive mechanism (20), and the other transmission mechanism (30) is slidably arranged on the drive mechanism (20). Both transmission mechanisms (30) are provided with clamping mechanisms (40), and the drive mechanism (20) is also provided with two limiting mechanisms (50). The transmission mechanism (30) includes two transmission components (31) arranged vertically and vertically and a support base (33) mounted on the two transmission components (31); the transmission component (31) includes a mounting cover (311), two gears (312) rotatably connected in the mounting cover (311) and a toothed belt (313) meshing with the two gears (312); the clamping mechanism (40) is arranged on the toothed belt (313) in the two transmission components (31); The clamping mechanism (40) includes multiple clamping components 1 (41) and multiple clamping components 2 (43) disposed on the toothed belt (313). Each clamping component 1 (41) and clamping component 2 (43) is provided with a movable component (42). Each clamping component 2 (43) is located between each two adjacent clamping components 1 (41). The clamping component 1 (41) includes a fixed plate (411) disposed on the toothed belt (313). The movable component (42) includes a movable plate (421) elastically slidably connected to the fixed plate (411). The movable plate (421) is provided with multiple insertion holes (422) for the limiting mechanism (50) to be inserted.

2. The welding equipment for the inner tank of a water heater according to claim 1, characterized in that, The transmission mechanism (30) also includes two rotating shafts (34), which are rotatably connected between the mounting covers (311) of the two transmission components (31). Two gears (312) in the transmission components (31) are respectively mounted on the outer side of one end of the two rotating shafts (34).

3. The water heater inner tank welding equipment according to claim 1, characterized in that, Each of the clamping components two (43) is located between each two adjacent clamping components one (41). Between each two adjacent clamping components one (41), the clamping component two (43) is positioned close to one of the clamping components one (41). The clamping components one (41) and the clamping component two (43) have the same structure.

4. The water heater inner tank welding equipment according to claim 1, characterized in that, The drive mechanism (20) includes a motor (21) mounted on the support mechanism (10), a mounting assembly (22) mounted on the output shaft of the motor (21), an adjustment assembly (23) mounted on the bottom side of the mounting assembly (22), and a sliding assembly (24) mounted on the top side of the adjustment assembly (23). Both transmission mechanisms (30) are located between the adjustment assembly (23) and the sliding assembly (24).

5. The water heater inner tank welding equipment according to claim 4, characterized in that, The adjustment assembly (23) includes a mounting plate (231), a lead screw (233), a threaded block (234), a fixed block (235), and a movable block (236). The mounting plate (231) is mounted on the mounting bracket (221). The lead screw (233) is rotatably connected inside the mounting plate (231). The fixed block (235) is mounted on the top of the threaded block (234). The movable block (236) is mounted on one side of the threaded block (234). The threaded block (234) is threadedly connected to the lead screw (233). One of the limiting mechanisms (50) is mounted on one side of the mounting plate (231), and the other limiting mechanism (50) is mounted on the movable block (236).

6. The water heater inner tank welding equipment according to claim 5, characterized in that, The sliding assembly (24) includes a mounting base (241), a second slider (243), and a connecting block (244). The mounting base (241) is mounted on a mounting bracket (221). The second slider (243) is slidably connected inside the mounting base (241). The connecting block (244) is mounted on the bottom of the second slider (243). The top and bottom of one of the transmission mechanisms (30) are respectively mounted on the mounting base (241) and the mounting plate (231), and the bottom and top of the other transmission mechanism (30) are respectively mounted on the fixing block (235) and the connecting block (244).

7. The water heater inner tank welding equipment according to claim 6, characterized in that, The limiting mechanism (50) includes an electric telescopic rod (51), a lifting plate (52), and two rows of limiting members. In the two limiting mechanisms (50), the electric telescopic rod (51) is installed on the mounting plate (231) and the movable block (236) respectively. The movable end of the electric telescopic rod (51) is installed on the lifting plate (52). The number of limiting members is equal to the number of holes (422) on the movable plate (421). The limiting component includes a limiting rod (53), a second spring (54), and a limiting plate (55). The limiting rod (53) is slidably connected to the lifting plate (52) in a vertical direction. The limiting plate (55) is installed at one end of the limiting rod (53). The second spring (54) is sleeved on the outside of the limiting rod (53), and the two ends of the second spring (54) are respectively fixedly installed on the lifting plate (52) and the limiting plate (55). The insertion hole (422) is adapted to the limiting rod (53).

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