Welding device for water tank inner container of air energy water heater

Abstract

The invention belongs to the related technical field of welding, and particularly discloses an air energy water heater water tank inner container welding device which comprises a first machine base, a motor driving device, an industrial camera, a lifting machine and a second machine base, a lead screw loading table is arranged above one end of the first machine base, and a lead screw is rotationally arranged on the inner side of one end of the lead screw loading table; the lead screw is connected with an output shaft of the motor driving device, a sliding base is slidably installed outside the lead screw loading table and is in threaded fit with the lead screw, the lifting machine is arranged on the upper surface of the sliding base, a plasma welding gun is connected to the outer side of the lifting machine through an arranged movable frame rod, and the second machine base is arranged on one side of the outer wall of the first machine base. A pipe fixing mechanism is arranged on the upper surface of the second machine base, a frame base is arranged at the position, close to the middle, of the upper surface of the second machine base, and hanging and pulling mechanisms are arranged at the two ends in the frame base correspondingly.

Description

Technical Field

[0001] The present invention belongs to the technical field related to welding, and specifically discloses a welding device for the inner tank of an air - energy water heater. Background Art

[0002] An air - energy water heater is an energy - saving device that uses the heat energy in the air to heat water and belongs to a type of heat pump water heater. Its working principle is similar to that of an air conditioner but operates in reverse, absorbing heat from the environment to heat water, rather than directly heating with electricity like a traditional electric water heater or generating heat by combustion like a gas water heater; The inner tank of the water heater is welded by metal plates, and the welding is a straight - seam welding. Before welding, the plates need to be rolled into a circle by a rolling machine first. However, when the rolling machine rolls the metal plates into a circle for welding, when placing the rolled tube, the position between the straight seam and the welding torch needs to be adjusted. Currently, the weld seams are aligned by the visual inspection of workers, which requires rich operation experience of workers. However, due to visual errors, the straight seam may be distorted during welding, affecting the welding quality. Therefore, we need to improve this problem. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems existing in the background art, and a welding device for the inner tank of an air - energy water heater is proposed, which includes a first machine base, a motor driving device, an industrial camera, a lift, and a second machine base. Above one end of the first machine base, a screw rod loading table is provided. Inside one end of the screw rod loading table, a screw rod is rotatably arranged, and the screw rod is connected to the output shaft of the motor driving device. A sliding seat is slidably installed outside the screw rod loading table, and the sliding seat is in threaded cooperation with the screw rod. The lift is arranged on the upper surface of the sliding seat, and a plasma welding torch is connected to the outside of the lift through a moving support rod. The second machine base is arranged on one side of the outer wall of the first machine base, a pipe - fixing mechanism is arranged on the upper surface of the second machine base, a support seat is arranged near the middle on the upper surface of the second machine base, and suspension pulling mechanisms are arranged at both ends inside the support seat.

[0004] Preferably, the pipe - fixing mechanism includes bottom shells arranged on the upper surfaces of both ends of the second machine base. Inside the bottom shells, multiple groups of rotating wheels are rotatably arranged. On both outer sides of the bottom shells, support seats are provided. Inside the support seats, a first hydraulic cylinder is installed above, and the telescopic end of the first hydraulic cylinder is provided with a resisting seat. Inside the resisting seat, a ball is rotatably arranged.

[0005] Preferably, the suspension pulling mechanism includes an electric telescopic cylinder arranged at one end inside the support seat. The telescopic end of the electric telescopic cylinder is provided with a sliding table, the sliding table is slidably connected to the support seat, and locking ropes are arranged on both outer sides of the sliding table wall.

[0006] Preferably, brackets are symmetrically arranged inside both sides of the second machine base. Mounting platforms are arranged on the upper surface of the second machine base. Second hydraulic cylinders are arranged on the outer surfaces of both ends of the mounting platforms. The telescopic ends of the second hydraulic cylinders are connected to the outer sides of the brackets at corresponding positions. A first connecting column and a second connecting column are jointly arranged inside two groups of brackets at the same end. The second connecting column is located above the first connecting column. Two positioning abutting wheels are respectively rotatably installed on the outer part of the first connecting column. One side outer surface of each of the two locking ropes abuts against the inside of the positioning abutting wheel at the corresponding position.

[0007] Preferably, one end of each of the two locking ropes away from the sliding platform is jointly rotatably connected to a clamping column. A connecting seat is rotatably arranged in the middle of the outside of the clamping column. An activity sleeve is arranged on one side of the connecting seat. A loading rod is rotatably inserted through the inside of the activity sleeve. The outer walls of the brackets are jointly connected to an arc-shaped abutting shell through symmetrically arranged abutting rods. Both ends of the outside of the loading rod are respectively rotatably connected to the arc-shaped abutting shell at the corresponding position through symmetrically rotatably arranged connecting blocks. A friction block is slidably installed inside the arc-shaped abutting shell.

[0008] Preferably, arc plates extend out from both sides of the outer wall of the arc-shaped abutting shell. A plurality of card slots are equidistantly arranged on the outer surfaces of the two arc plates along the arc direction. A fixing shell is erected in the middle of the outside of the friction block. Locking members are arranged at both ends inside the fixing shell. A rebound mechanism is arranged on the outer surface of the fixing shell and close to the middle.

[0009] Preferably, the locking member includes a clamping cylinder fixedly inserted into one end inside the fixing shell. A spring is arranged inside the clamping cylinder. A sliding rod is slidably arranged inside the clamping cylinder at one end of the spring. An abutting column is arranged at one end of the sliding rod away from the spring. A clamping position column is rotatably arranged at one end of the outside of the abutting column. The clamping position column is in rolling contact with the card slot on the outer surface of the arc plate. The outer surface of the clamping position column has a plurality of prism surfaces, and the plurality of prism surfaces are arranged in a rectangle.

[0010] Preferably, the rebound mechanism includes a telescopic elastic column fixedly arranged in the middle of the outer surface of the fixing shell. The other end of the telescopic elastic column is connected to the lower surface of the abutting rod. A tension spring is sleeved on the outside of the telescopic elastic column. Both ends of the tension spring are respectively connected to the upper end and the lower end of the telescopic elastic column.

[0011] Preferably, sliding grooves are formed on both sides inside the fixing shell. The abutting column slides inside the sliding grooves.

[0012] Preferably, an arc-shaped platform is arranged on the outside of one end of the second machine base. A vertical rod is arranged on the upper end surface of the arc-shaped platform. A machine frame is slidably installed on the outside of the vertical rod. The industrial camera is fixedly installed on the outer wall of the machine frame. A locking pin is threadedly inserted into one end inside the machine frame.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The industrial camera can be connected to an external computing program to scan the surface of the coiled pipe in real time, capture the position of the straight seam, extract the weld contour coordinates through an image processing algorithm, and feed back the industrial camera data to the external control system to drive the lifting and pulling mechanism to adjust the position of the coiled pipe, ensuring that the weld always aligns with the welding path of the plasma welding torch, avoiding problems such as straight seam distortion caused by manual visual inspection, and greatly improving the welding accuracy; When the straight seam outside the coiled pipe is different due to the placement position of the worker, through the corresponding lifting and pulling mechanisms set on the left and right, cooperating with the hydraulic cylinder and the abutment for clamping and pulling, the straight seam can be quickly positioned in the welding area of the welding torch, reducing the error of traditional visual adjustment, maintaining the straight welding of the straight seam, and improving the welding quality; Multiple groups of rotating wheels are rotatably arranged inside the bottom shell of the pipe fixing mechanism, which is convenient for placing and initially positioning the coiled pipe. The first hydraulic cylinders are installed inside the support seats on both sides outside the bottom shell, and the rollers are rotatably arranged inside the abutments at the telescopic ends. The first hydraulic cylinders are symmetrically arranged on both sides of the coiled pipe, and the abutments can be driven to abut against the outside of the coiled pipe, improving the stability of the coiled pipe during welding, and at the same time cooperating with the auxiliary lifting and pulling mechanism to provide rolling support for the coiled pipe; The friction blocks are flexibly attached to the outer wall of the coiled pipe through the tension springs and the telescopic elastic columns to provide uniform pressure. When the friction blocks move to the outer surface of the coiled pipe and press against it, the friction blocks can be self-locked through the rolling cooperation of the positioning columns and the card slots, avoiding the coiled pipe driving the friction blocks to move without traction force, and enabling the lifting and pulling mechanism to more accurately adjust the position of the straight seam. Brief Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall connection structure of the present invention from another angle; Figure 3 It is a schematic diagram of the connection structure between the bracket and the lifting and pulling mechanism of the present invention; Figure 4 It is a schematic diagram of the connection structure between the support seat and the first hydraulic cylinder of the present invention; Figure 5 It is a schematic diagram of the partial connection structure between the arc-shaped abutment shell and the fixed shell of the present invention; Figure 6 It is a schematic diagram of the partial connection structure inside the clamping cylinder of the present invention; Figure 7 For the present invention Figure 1 The enlarged structure schematic diagram at A in it.

[0015] In the figure: 1. First machine base; 2. Motor drive device; 3. Industrial camera; 4. Moving support rod; 5. Slide base; 6. Lift; 7. Plasma welding torch; 8. First hydraulic cylinder; 9. Supporting base; 10. Support seat; 11. Support base; 12. Second machine base; 13. Bottom shell; 14. Arc-shaped table; 15. Vertical rod; 16. Bracket; 17. Screw rod loading table; 18. Second hydraulic cylinder; 19. First connecting column; 20. Slide table; 21. Electric telescopic cylinder; 22. Positioning abutting wheel; 23. Locking rope; 24. Friction block; 25. Connecting block; 26. Abutting rod; 27. Movable sleeve; 28. Connecting seat; 29. Clamping column; 30. Arc-shaped abutting shell; 31. Second connecting column; 32. Rotating wheel; 33. Arc plate; 34. Abutting column; 35. Slide rod; 36. Spring; 37. Clamping cylinder; 38. Positioning column; 39. Loading rod; 40. Fixed shell; 41. Tension spring; 42. Support platform. Detailed implementation manner

[0016] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0017] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed below.

[0018] As Figures 1-7 shown, a welding device for the inner tank of an air energy water heater includes a first machine base 1, a motor drive device 2, an industrial camera 3, a lift 6, and a second machine base 12. A screw rod loading table 17 is arranged above one end of the first machine base 1. A screw rod is rotatably arranged inside one end of the screw rod loading table 17, and the screw rod is connected to the output shaft of the motor drive device 2. A slide base 5 is slidably installed outside the screw rod loading table 17, and the slide base 5 is in threaded cooperation with the screw rod. The lift 6 is arranged on the upper surface of the slide base 5. The plasma welding torch 7 is connected to the outside of the lift 6 through a moving support rod 4 arranged. The second machine base 12 is arranged on one side of the outer wall of the first machine base 1. A fixed pipe mechanism is arranged on the upper surface of the second machine base 12. A support base 11 is arranged near the middle on the upper surface of the second machine base 12. Hoisting mechanisms are arranged at both ends inside the support base 11. An arc-shaped table 14 is arranged outside one end of the second machine base 12. A vertical rod 15 is arranged on the upper end surface of the arc-shaped table 14. A machine frame is slidably installed outside the vertical rod 15. The industrial camera 3 is fixedly installed on the outer wall of the machine frame. A locking pin is screwed through one end inside the machine frame; The motor drive device 2 is composed of components such as a motor, a belt, and a drive wheel; The lift 6 can be used with an electric hoist; When the motor drive device 2 drives the lead screw to rotate, the slide seat 5 drives the plasma welding torch 7 to move horizontally, and the elevator 6 adjusts the height of the plasma welding torch 7; The industrial camera 3 is a high-speed camera that captures position coordinates and images for common industrial preparation. Connected to an external computer program and a control program, it can accurately scan the coiled pipe, capture the position of the straight seam, and then feedback it to the control system. The control system then drives each drive hydraulic component and electrical component. The control system can be a PLC controller.

[0019] The pipe fixing mechanism includes bottom shells 13 arranged on the upper surfaces of both ends of the second machine base 12. A plurality of groups of rotating wheels 32 are rotatably arranged inside the bottom shells 13. Support seats 10 are arranged on both outer sides of the bottom shells 13. A first hydraulic cylinder 8 is installed above the inside of the support seats 10. A contact seat 9 is arranged at the telescopic end of the first hydraulic cylinder 8. A ball is rotatably arranged inside the contact seat 9. The first hydraulic cylinders 8 are symmetrically arranged on both sides of the coiled pipe. The contact seat 9 can be driven by the first hydraulic cylinder 8 to abut against the outside of the coiled pipe, which not only facilitates improving the stability of the coiled pipe during subsequent welding but also cooperates with the rolling support of the lifting and pulling mechanism.

[0020] The lifting and pulling mechanism includes an electric telescopic cylinder 21 arranged at one end inside the frame base 11. A slide table 20 is arranged at the telescopic end of the electric telescopic cylinder 21. The slide table 20 is slidably connected to the frame base 11. Locking ropes 23 are arranged on both outer sides of the outer wall of the slide table 20. The electric telescopic cylinder 21 can drive the slide table 20 to move, thereby pulling the locking ropes 23 to move downward.

[0021] Brackets 16 are symmetrically arranged inside both sides of the second machine base 12. Frame platforms 42 are arranged on the upper surfaces of the second machine base 12. Second hydraulic cylinders 18 are arranged on the outer surfaces of both ends of the frame platforms 42. The telescopic ends of the second hydraulic cylinders 18 are connected to the outer sides of the corresponding brackets 16. A first connecting column 19 and a second connecting column 31 are jointly arranged inside the two brackets 16 at the same end. The second connecting column 31 is located above the first connecting column 19. Two positioning contact wheels 22 are rotatably installed on the outer part of the first connecting column 19. One side outer surface of the two locking ropes 23 abuts against the inside of the corresponding positioning contact wheels 22.

[0022] The two ends of the two locking ropes 23 away from the slide table 20 are jointly rotatably connected to a clamping column 29. A connecting seat 28 is rotatably arranged in the middle of the outside of the clamping column 29. An activity sleeve 27 is arranged on one side of the connecting seat 28. A loading rod 39 is rotatably inserted inside the activity sleeve 27. The outer walls of the brackets 16 are jointly connected to an arc-shaped contact shell 30 through symmetrically arranged abutting rods 26. The two ends of the outer part of the loading rod 39 are respectively rotatably connected to the arc-shaped contact shell 30 at the corresponding positions through symmetrically rotatably arranged connecting blocks 25. A friction block 24 is slidably installed inside the arc-shaped contact shell 30. When the second hydraulic cylinder 18 extends and drives the bracket 16 to approach the coiled pipe, the arc-shaped contact shell 30 can drive the internal friction block 24 to approach the coiled pipe, causing the friction block 24 to press against the outer surface of the coiled pipe; The first connecting column 19 enables the two sets of brackets 16 to move in unison; The first connecting column 19 facilitates the installation of the positioning abutting wheel 22 at the lower end of the locking rope 23, which is used for guiding the position of the locking rope 23 during pulling, ensuring that the locking rope 23 can pull the friction block 24, thereby causing the friction block 24 to wrap around the cross-sectional curved surface of the coiling tube and drive the coiling tube to rotate. A rubber pad made of high-density rubber material is provided on the curved surface side of the friction block 24 facing the coiling tube, and the inner cut surface of the friction block 24 is also arc-shaped. Therefore, when the friction block 24 moves inside the arc-shaped abutting shell 30, the coiling tube also rotates to one side under the action of frictional resistance.

[0023] Arc-shaped plates 33 extend from both sides of the outer wall of the arc-shaped abutting shell 30. Slots are equidistantly arranged along the arc direction on the outer surfaces of the two arc-shaped plates 33. A fixing shell 40 is erected in the middle of the outside of the friction block 24. Locking members are provided at both ends inside the fixing shell 40, and a rebounding mechanism is provided on the outer surface of the fixing shell 40 near the middle; The locking member includes a cartridge 37 fixedly inserted at one end inside the fixing shell 40. A spring 36 is arranged inside the cartridge 37. A sliding rod 35 is slidably arranged at one end of the spring 36 inside the cartridge 37. An abutting column 34 is arranged at the end of the sliding rod 35 away from the spring 36. A positioning column 38 is rotatably arranged at the outside of one end of the abutting column 34. The positioning column 38 is in rolling contact with the slots on the outer surface of the arc-shaped plate 33. The outer surface of the positioning column 38 has a plurality of prism surfaces, and the plurality of prism surfaces are arranged in a rectangle. Sliding grooves are opened on both sides inside the fixing shell 40. The abutting column 34 slides inside the sliding grooves. When the friction block 24 slides downward inside the arc-shaped abutting shell 30, the positioning column 38 can roll inside the corresponding slot, preventing the friction block 24 from sliding down by itself. And in order to adapt to the arc-shaped displacement of the friction block 24, the spring 36 can ensure that the positioning column 38 always follows the arc path and rolls against the surface of the slot. The plurality of prism surfaces also correspond to the grooves on the inner surface of the slot, and the friction block 24 is locked above the arc-shaped abutting shell 30 when not being pulled.

[0024] The rebounding mechanism includes a telescopic elastic column fixedly arranged at the middle of the outer surface of the fixing shell 40. The other end of the telescopic elastic column is connected to the lower surface of the abutting rod 26. A tension spring 41 is sleeved outside the telescopic elastic column. Both ends of the tension spring 41 are connected to the upper end and the lower end of the telescopic elastic column respectively. When the friction block 24 slides downward along with the pulling of the locking rope 23, the lower ends of the telescopic elastic column and the tension spring 41 are pulled and will extend and deform downward. When the pulling force is greater than the elastic force, the friction block 24 can slide stably. When the pulling force decreases, the tension spring 41 and the elastic telescopic column can rebound. It should be specially noted that the elastic force of the spring 36 inside the cartridge 37 is less than that of the tension spring 41. Therefore, when the tension spring 41 resets, the positioning column 38 will move accordingly.

[0025] Working principle: During use, the coiled pipe is placed above two groups of bottom shells 13. The industrial camera 3 scans the surface of the coiled pipe to identify the position of the straight seam and feeds back the coordinates to the control system. The control system then automatically drives the electric telescopic cylinder 21 and the second hydraulic cylinder 18 to perform corresponding operations. According to the position of the straight seam and the position spacing of the welding torch, different side lifting and pulling mechanisms are selected for use; The second hydraulic cylinder 18 then prompts the two groups of horizontally symmetrically arranged brackets 16 on this side to move towards the coiled pipe until the friction block 24 abuts against the curved surface of one side of the coiled pipe. (During the movement, due to the elastic telescopic columns and tension springs 41 arranged outside the friction block 24, the friction block 24 will not slide inside the arc-shaped abutting shell 30 by itself without the pulling force, and can also reset the friction block 24). When the friction block 24 adheres to the coiled pipe, the electric telescopic cylinder 21 drives the sliding table 20 to move towards the other end. The sliding table 20 pulls the locking rope 23, and the positioning abutting wheel 22 cooperates with the locking rope 23 to rotate flexibly to guide the locking rope 23. When the lower end of the locking rope 23 is stretched, the connecting seat 28 and the movable sleeve 27 pull the loading rod 39, causing the friction block 24 to slide towards the lower end of the arc-shaped abutting shell 30. Since the friction block 24 abuts against and has frictional resistance with the outer surface of the coiled pipe, when the friction block 24 slides downward, it will drive the coiled pipe to rotate, making the straight seam face the welding port of the plasma welding torch 7. At the same time, the two groups of first hydraulic cylinders 8 on the opposite side can press the abutting seat 9 against the outer surface of the other side of the coiled pipe. When the coiled pipe rotates under frictional pressure, the balls inside the abutting seat 9 cooperate to hold and roll the coiled pipe. (During the sliding process of the friction block 24, the positioning column 38 in the locking part rolls into contact with the card slot on the outer surface of the arc plate 33. The spring 36 ensures that the positioning column 38 always rolls along the arc path and abuts against the surface of the card slot. Multiple prism surfaces correspond to the card slot grooves, and can lock the position of the friction block 24 when there is no pulling force on the friction block 24 to prevent it from sliding down by itself). In this way, the position of the straight seam can be accurately and quickly adjusted to ensure that the plasma welding torch 7 can quickly capture the straight seam for welding, solving the problems of difficult straight seam alignment and much manual intervention in traditional water tank inner liner welding, and significantly improving the welding accuracy and efficiency.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A welding device for the inner tank of an air - energy water heater, comprising a first machine base (1), a motor driving device (2), an industrial camera (3), a lift (6), and a second machine base (12), characterized in that: Above one end of the first machine base (1), a lead screw loading table (17) is provided. Inside one end of the lead screw loading table (17), a lead screw is rotatably arranged, and the lead screw is connected to the output shaft of the motor driving device (2). A sliding seat (5) is slidably installed outside the lead screw loading table (17), and the sliding seat (5) is in threaded cooperation with the lead screw. An elevator (6) is arranged on the upper surface of the sliding seat (5). A plasma welding torch (7) is connected to the outside of the elevator (6) through a moving support rod (4). The second machine base (12) is arranged on one side of the outer wall of the first machine base (1). A pipe fixing mechanism is arranged on the upper surface of the second machine base (12). A support seat (11) is arranged on the upper surface of the second machine base (12) and near the middle. Hoisting mechanisms are arranged at both ends inside the support seat (11).

2. The welding device for the inner tank of an air energy water heater according to claim 1, characterized in that: The pipe fixing mechanism includes bottom shells (13) arranged on the upper surfaces of both ends of the second machine base (12). Inside the bottom shells (13), multiple groups of rotating wheels (32) are rotatably arranged. On both outer sides of the bottom shells (13), support seats (10) are arranged. Inside the upper part of the support seats (10), first hydraulic cylinders (8) are installed. The telescopic ends of the first hydraulic cylinders (8) are provided with abutting seats (9), and inside the abutting seats (9), balls are rotatably arranged.

3. A welding device for the inner tank of an air energy water heater according to claim 1, characterized in that: The hoisting mechanism includes an electric telescopic cylinder (21) arranged at one end inside the support seat (11). The telescopic end of the electric telescopic cylinder (21) is provided with a sliding table (20), and the sliding table (20) is slidably connected to the support seat (11). Locking ropes (23) are arranged on both outer sides of the outer wall of the sliding table (20).

4. A welding device for the inner tank of an air energy water heater according to claim 3, characterized in that: On both sides inside the second machine base (12), brackets (16) are symmetrically arranged. On the upper surface of the second machine base (12), support platforms (42) are arranged. On the outer surfaces of both ends of the support platforms (42), second hydraulic cylinders (18) are arranged. The telescopic ends of the second hydraulic cylinders (18) are connected to the outer sides of the corresponding brackets (16). Inside the two brackets (16) at the same end, a first connecting column (19) and a second connecting column (31) are jointly arranged. The second connecting column (31) is located above the first connecting column (19). Two positioning abutting wheels (22) are respectively rotatably installed outside the first connecting column (19). One side outer surface of the two locking ropes (23) abuts against the inside of the corresponding positioning abutting wheels (22).

5. The welding device for the inner tank of an air energy water heater according to claim 4, characterized in that: One end of the two locking ropes (23) far from the sliding table (20) is jointly rotatably connected to a clamping column (29). In the middle of the outside of the clamping column (29), a connecting seat (28) is rotatably arranged. On one side of the connecting seat (28), a movable sleeve (27) is arranged. Inside the movable sleeve (27), a loading rod (39) is rotatably inserted. The outer walls of the brackets (16) are jointly connected to an arc-shaped abutting shell (30) through symmetrically arranged abutting rods (26). The two ends of the outside of the loading rod (39) are respectively rotatably connected to the arc-shaped abutting shell (30) at the corresponding positions through symmetrically rotatably arranged connecting blocks (25). A friction block (24) is slidably installed inside the arc-shaped abutting shell (30).

6. The welding device for the inner tank of an air energy water heater according to claim 5, characterized in that: On both sides of the outer wall of the arc-shaped abutting shell (30), arc plates (33) extend respectively. On the outer surfaces of the two arc plates (33), clamping grooves are arranged at equal distances along the arc direction. In the middle of the outside of the friction block (24), a fixed shell (40) is installed. At both ends inside the fixed shell (40), locking members are arranged. On the outer surface of the fixed shell (40) and near the middle, a resilient mechanism is arranged.

7. A welding device for the inner tank of an air energy water heater according to claim 6, characterized in that: The locking member includes a clamping cylinder (37) fixedly inserted at one end inside the fixed shell (40). A spring (36) is arranged inside the clamping cylinder (37). Inside the clamping cylinder (37) and at one end of the spring (36), a sliding rod (35) is slidably arranged. At the end of the sliding rod (35) away from the spring (36), an abutting column (34) is arranged. At the outside of one end of the abutting column (34), a clamping position column (38) is rotatably arranged. The clamping position column (38) is in rolling contact with the clamping grooves on the outer surface of the arc plate (33). The outer surface of the clamping position column (38) has a plurality of prism surfaces, and the plurality of prism surfaces are arranged in a rectangle.

8. The welding device for the inner tank of an air energy water heater according to claim 6, characterized in that: The resilient mechanism includes a telescopic elastic column fixedly arranged at the middle of the outer surface of the fixed shell (40). The other end of the telescopic elastic column is connected to the lower surface of the abutting rod (26). A tension spring (41) is sleeved outside the telescopic elastic column. Both ends of the tension spring (41) are respectively connected to the upper end and the lower end of the telescopic elastic column.

9. A welding device for the inner tank of an air energy water heater according to claim 7, characterized in that: On both sides inside the fixed shell (40), chutes are opened. The abutting column (34) slides inside the chutes.

10. A welding device for the inner tank of an air energy water heater according to claim 1, characterized in that: At the outside of one end of the second machine base (12), an arc-shaped platform (14) is arranged. On the upper end surface of the arc-shaped platform (14), a vertical rod (15) is arranged. A frame is slidably installed outside the vertical rod (15). The industrial camera (3) is fixedly installed on the outer wall of the frame. A locking pin is screwed and inserted inside one end of the frame.

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