A welding device for machining the inner ring of a valve

Abstract

The present invention discloses a welding device for machining the inner ring of a valve, which relates to the technical field of valve welding. The welding device includes a frame body, a conveyor belt is arranged inside the frame body, and a plurality of partition plates are evenly arranged at equal intervals on the conveyor belt. In the present invention, the feeding and positioning are accurately coordinated by the push rod, U-shaped ring 1 and U-shaped ring 2. The push plate, clamping block, etc. in the fixing assembly clamp accurately and stably. The rotating cylinder drives the valve body to rotate, and the welding assembly welds efficiently, so as to perform automatic rotary inner ring welding on the valve body, and finally realize automatic blanking. This greatly improves the welding efficiency and reduces the labor cost. Through precise clamping and fixing, the interaction of the contact block, push block, etc. on the push plate, and accurate feeding and positioning significantly improve the welding quality and accuracy. The reasonable and compact structural design, combined with structures such as spring 1, spring 2, limit block and limit groove, ensures the stability and smoothness of the equipment operation.

Description

Technical Field

[0001] The present invention relates to the technical field of valve welding, and particularly to a welding device for inner ring processing of valves. Background Art

[0002] A valve is a control component in a fluid transportation system, with functions such as cut-off, regulation, diversion, prevention of backflow, pressure stabilization, flow splitting, or overflow pressure relief. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media. When processing and producing valves, it is necessary to weld the inner rings of the valves.

[0003] The currently available welding devices for inner ring processing of valves are found to have at least the following technical problems:

[0004] First, in traditional inner ring welding of valves, usually an operator places the valve body on the clamping station manually, and then uses a welding device to weld the inner ring of the valve. After welding, the operator also needs to manually release the fixture's fixation on the valve, and then remove the valve, and then place another valve on the clamping station for fixation. Loading, clamping and fixing, releasing the fixation, and unloading all need to be manually operated. The entire operation procedure is rather cumbersome, time-consuming and laborious, reducing the welding efficiency of the valves.

[0005] Second, it is difficult for manual operation to ensure the position consistency of the valve body on the clamping station each time, and deviations are likely to occur, thus affecting the welding accuracy and quality.

[0006] Third, when facing the demand for large-scale production, the speed and efficiency of manual welding far cannot meet the market requirements. In view of the above problems, we propose a welding device that can achieve fully automated operation, including precise loading, stable fixation, high-quality welding, and automatic unloading, which has become the key to improving production efficiency and product quality in the valve manufacturing industry. Summary of the Invention

[0007] (I) Technical Problems to be Solved

[0008] In view of the deficiencies of the prior art, the present invention provides a welding device for inner ring processing of valves to solve the above-mentioned technical problems.

[0009] (II) Technical Solutions

[0010] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0011] A welding device for machining the inner ring of a valve, comprising a frame body. A conveyor belt is arranged inside the frame body, and a number of partition plates are equidistantly arranged on the conveyor belt. A valve body is placed between each adjacent pair of partition plates. Notches flush with the conveyor belt are formed on both sides of the upper surface of the frame body. A base is fixedly installed at the end of the frame body, and a rotating cylinder is rotatably installed on the upper end of the base. A welding assembly is arranged above the rotating cylinder. The welding assembly includes a connecting rod, a first connecting block, and a welding head. The welding head is installed on the first connecting block. A fixing assembly is arranged inside the rotating cylinder. The fixing assembly includes a push plate, and three clamping blocks for fixing the valve body are circumferentially and equidistantly arranged on the push plate. A pushing assembly is arranged on the frame body. The pushing assembly includes a pushing rod, and two first U-shaped rings are fixedly installed on the pushing rod. A positioning assembly is arranged on the rotating cylinder. The positioning assembly includes a long rod, and two second U-shaped rings are fixedly installed on the long rod. The opening directions of the two second U-shaped rings are opposite to those of the two first U-shaped rings.

[0012] Preferably: A sliding rod is slidably installed inside the connecting rod, and a second connecting block is slidably installed on the sliding rod. The bottom end of the second connecting block is fixedly installed with a first electric push rod. The telescopic rod one of the first electric push rod is fixedly connected to the first connecting block. A second electric push rod is fixedly installed on the connecting rod. The telescopic rod two of the second electric push rod is fixedly connected to the sliding rod. A third electric push rod is fixedly installed on the sliding rod. The telescopic rod three of the third electric push rod is fixedly connected to the second connecting block. A servo motor two for driving the rotation of the rotating cylinder is fixedly installed inside the base. A central hole is formed on the upper surface of the rotating cylinder. A fourth electric push rod is fixedly installed on the bottom wall of the inner cavity of the base. A push plate is slidably installed inside the inner cavity of the rotating cylinder. The telescopic rod four of the fourth electric push rod is fixedly connected to the middle of the bottom end of the push plate. Three sliding grooves are circumferentially and equidistantly formed on the upper surface of the push plate. The bottom end of each clamping block is respectively slidably installed in the sliding groove.

[0013] Preferably: A first round rod is fixedly installed in each sliding groove, and a first spring is movably sleeved on each first round rod. Each clamping block is fixedly connected to the inner wall of the sliding groove through the first spring. A contact block is fixedly installed on the inner side of each clamping block. A fixing block is fixedly installed in the central hole. Three pushing blocks are circumferentially and equidistantly fixedly installed on the fixing block. Each pushing block and each contact block are triangular in shape. Each pushing block is respectively located above the contact block. Limiting grooves are formed on the inner walls on both sides of the rotating cylinder. Limiting blocks are fixedly installed at both ends of the push plate. Each limiting block is respectively slidably installed in the limiting groove.

[0014] Preferably, a first support arm is fixedly installed at the end of the frame body. A first motor is fixedly installed on the first support arm. A first threaded rod is fixedly connected to the output shaft of the first motor. The first threaded rod penetrates through the push rod and is threadedly connected to the push rod. A limiting rod is fixedly installed on the first support arm. The limiting rod movably penetrates through the push rod. A feeding plate is fixedly installed at the end of the frame body. The feeding plate is located at the notch away from the first support arm. The base is located on one side of the feeding plate. A toothed ring is movably sleeved on the rotating cylinder. An annular groove is formed in the inner wall of the toothed ring. A limiting ring is arranged in the annular groove. The limiting ring is fixedly sleeved on the rotating cylinder. A long rod is fixedly installed at the upper end of the toothed ring. An extension rod is fixedly installed at the outer end of the long rod. A second threaded rod is rotatably installed between the extension rod and the long rod. A servo motor three is fixedly installed on the long rod. The output shaft three of the servo motor three is fixedly connected to the second threaded rod. A pushing rod is slidably installed at the upper end of the extension rod. The pushing rod movably penetrates through the long rod. One end of the pushing rod is fixedly connected to a pushing block. The pushing block is located inside the long rod.

[0015] Preferably, a rack penetrates through the frame body movably. The rack meshes with the toothed ring. A contact rod is fixedly installed at one end of the rack. A rectangular plate is fixedly sleeved on the rack. The rectangular plate is attached to the outer end of the frame body. An L-shaped plate is fixedly connected to the outer end of the frame body. A second round rod is fixedly connected between the L-shaped plate and the frame body. A second spring is movably sleeved on the second round rod. The second round rod movably penetrates through the rectangular plate. The rectangular plate is fixedly connected to the L-shaped plate through the second spring. The contact rod is located at the outer end of the L-shaped plate. The contact rod is located on one side of the toothed ring. A second support arm is fixedly installed at the end of the frame body. A connecting rod is fixedly installed on the second support arm. A guiding plate is fixedly installed at the end of the frame body. The guiding plate is located on one side of the rotating cylinder.

[0016] (III) Beneficial effects

[0017] First, this welding equipment realizes a highly automated welding process. The conveyor belt can automatically convey the valve body. The push rod, the first U-shaped ring, and the second U-shaped ring cooperate precisely to complete the feeding and positioning. The push plate, the clamping block, etc. in the fixing component clamp precisely and stably. The rotating cylinder drives the valve body to rotate, and the welding component welds efficiently, so as to perform rotary inner-ring automatic welding on the valve body. Finally, automatic blanking is realized. This greatly improves the welding efficiency and reduces the labor cost. Through precise clamping and fixing, the interaction between the contact block and the push block on the push plate, and precise feeding and positioning, the welding quality and accuracy are significantly improved. The reasonable and compact structure design, combined with structures such as the first spring, the second spring, the limiting block, and the limiting groove, ensures the stability and smoothness of the equipment operation.

[0018] 2. The three clamping blocks in the fixing component can stably and accurately clamp and fix the valve body. Under the coordinated action of the electric push rod 4, the push plate, the contact block and the push block, automatic fastening is realized, so that the rotation of the rotating cylinder can drive the valve body to rotate, thereby automatically welding the inner ring of the valve body in a rotary manner, effectively improving the welding efficiency of the inner ring of the valve body.

[0019] 3. The ingenious cooperation of the push rod, U-shaped ring 1 and U-shaped ring 2 can accurately position the valve body at the center of the rotating cylinder, so that the clamping block can accurately insert into the valve body for clamping, ensuring the accuracy and consistency of each feeding, and effectively avoiding welding mistakes caused by position deviation.

[0020] 4. This welding equipment realizes a highly automated production process. The conveyor belt conveys the valve body, the push rod and U-shaped ring 1 accurately feed the material, the rotating cylinder drives the rotation for welding, and automatic blanking are completed in one go, greatly reducing manual intervention, significantly improving production efficiency and reducing labor costs.

[0021] 5. The rotation of the toothed ring will drive the long rod to rotate. The rotation of the long rod will drive the two U-shaped rings 2 to rotate 90 degrees with the center of the rotating cylinder as the axis, so that the positions of the two U-shaped rings 2 correspond to the position of the material guiding plate. Then start the electric push rod 4 to make the push plate move down, so that the fixing component releases the fixation of the valve body. Then start the servo motor 3 to make the threaded rod 2 rotate. The rotation of the threaded rod 2 drives the servo motor 3 to move. The movement of the servo motor 3 drives the pushing block to move. The movement of the pushing block pushes the valve body to move, so that the valve body is pushed to the material guiding plate and slides out along the inclined direction of the material guiding plate, realizing the automatic blanking of the valve body after welding. The whole blanking process is smooth and highly automated, greatly improving the blanking efficiency, reducing manual operation and reducing labor intensity.

[0022] 6. This welding equipment can successively process and weld multiple valve bodies. Through the continuous conveying of the conveyor belt and the coordinated actions of each component, the valve bodies are automatically welded in sequence, greatly improving the continuity of this welding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the description, the following will describe in detail with reference to the preferred embodiments of the present invention and the accompanying drawings.

[0024] Figure 1 It is the overall structure diagram of the welding equipment for valve inner ring processing of the present invention;

[0025] Figure 2 It is the structure diagram of the frame body of the present invention;

[0026] Figure 3 It is a structural diagram of the base of the present invention;

[0027] Figure 4 It is a structural diagram of a cutaway drum of the present invention;

[0028] Figure 5 It is a structural diagram of the clamping block of the present invention;

[0029] Figure 6 is a structural diagram of a welding assembly of the present invention;

[0030] Figure 7 is a structural diagram of the gear ring of the present invention;

[0031] Figure 8 It is a structural diagram of the rack of the present invention;

[0032] Figure 9 It is a structural diagram of the push rod of the present invention.

[0033] Legend: 1. Frame; 11. Conveyor belt; 12. Partition plate; 13. Support arm 1; 14. Motor 1; 15. Threaded rod 1; 16. Limit rod; 17. Feed plate; 18. L plate; 19. Support arm 2; 2. Base; 21. Rotating drum; 22. Center hole; 23. Electric push rod 4; 24. Limit groove; 3. Welding assembly; 31. Connecting rod; 32. Connecting block 1; 33. Welding head; 34. Electric push rod 1; 35. Sliding rod; 36. Connecting block 2; 37. Electric push rod 3; 38. Electric push rod 2; 4. Push plate; 41 , slide groove; 42, clamping block; 43, round rod one; 44, spring one; 45, contact block; 46, fixed block; 47, push block; 48, limit block; 5, push rod; 51, U-shaped ring one; 52, valve body; 6, gear ring; 61, annular groove; 62, limit ring; 7, long rod; 71, U-shaped ring two; 72, extension rod; 73, servo motor three; 74, threaded rod two; 75, push rod; 76, push block; 77, smoothing plate; 9, rack; 91, contact rod; 92, rectangular plate; 93, round rod two; 94, spring two. DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] Embodiment: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown in the figure, in view of the problems existing in the prior art, the present invention provides a welding device for processing the inner ring of a valve, including a frame 1. A conveyor belt 11 is arranged inside the frame 1. A number of partition plates 12 are evenly arranged on the conveyor belt 11. A valve body 52 is placed between each adjacent partition plate 12. Notches flush with the conveyor belt 11 are opened on both sides of the upper surface of the frame 1. A base 2 is fixedly installed at the end of the frame 1. A rotating cylinder 21 is rotatably installed on the upper end of the base 2. A welding assembly 3 is arranged above the rotating cylinder 21. The welding assembly 3 includes a connecting rod 31, a first connecting block 32 and a welding head 33. The welding head 33 is installed on the first connecting block 32. A fixing assembly is arranged inside the rotating cylinder 21. The fixing assembly includes a push plate 4. Three clamping blocks 42 for fixing the valve body 52 are arranged on the push plate 4 at equal circumferential intervals. A pushing assembly is arranged on the frame 1. The pushing assembly includes a pushing rod 5. Two first U-shaped rings 51 are fixedly installed on the pushing rod 5. A positioning assembly is arranged on the rotating cylinder 21. The positioning assembly includes a long rod 7. Two second U-shaped rings 71 are fixedly installed on the long rod 7. The opening directions of the two second U-shaped rings 71 are opposite to those of the two first U-shaped rings 51. A sliding rod 35 is slidably installed inside the connecting rod 31. A second connecting block 36 is slidably installed on the sliding rod 35. An electric push rod 34 is fixedly installed at the bottom end of the second connecting block 36. The telescopic rod one of the electric push rod 34 is fixedly connected to the first connecting block 32. An electric push rod 38 is fixedly installed on the connecting rod 31. The telescopic rod two of the electric push rod 38 is fixedly connected to the sliding rod 35. An electric push rod 37 is fixedly installed on the sliding rod 35. The telescopic rod three of the electric push rod 37 is fixedly connected to the second connecting block 36. A servo motor two for driving the rotating cylinder 21 to rotate is fixedly installed inside the base 2. A central hole 22 is opened on the upper surface of the rotating cylinder 21. An electric push rod 23 is fixedly installed on the bottom wall of the inner cavity of the base 2. A push plate 4 is slidably installed inside the inner cavity of the rotating cylinder 21. The telescopic rod four of the electric push rod 23 is fixedly connected to the middle of the bottom end of the push plate 4. Three sliding grooves 41 are opened on the upper surface of the push plate 4 at equal circumferential intervals. The bottom end of each clamping block 42 is respectively slidably installed in the sliding groove 41. A first round rod 43 is fixedly installed in each sliding groove 41. A first spring 44 is movably sleeved on each first round rod 43. Each clamping block 42 is fixedly connected to the inner wall of the sliding groove 41 through the first spring 44. A contact block 45 is fixedly installed on the inner side of each clamping block 42. A fixing block 46 is fixedly installed in the central hole 22. Three pushing blocks 47 are fixedly installed on the fixing block 46 at equal circumferential intervals. Each pushing block 47 and each contact block 45 are triangular in shape. Each pushing block 47 is respectively located above the contact block 45. Limiting grooves 24 are opened on both inner walls of the rotating cylinder 21. Limiting blocks 48 are fixedly installed at both ends of the push plate 4. Each limiting block 48 is respectively slidably installed in the limiting groove 24. A first support arm 13 is fixedly installed at the end of the frame 1. A first motor 14 is fixedly installed on the first support arm 13. The output shaft one of the first motor 14 is fixedly connected to a first threaded rod 15. The first threaded rod 15 penetrates through the pushing rod 5 and is threadedly connected to the pushing rod 5.A limiting rod 16 is fixedly installed on the first support arm 13. The limiting rod 16 movably penetrates through the push rod 5. A feeding plate 17 is fixedly installed at the end of the frame body 1. The feeding plate 17 is located at the notch far from the first support arm 13. The base 2 is located on one side of the feeding plate 17. A toothed ring 6 is movably sleeved on the rotating cylinder 21. An annular groove 61 is formed in the inner wall of the toothed ring 6. A limiting ring 62 is arranged in the annular groove 61. The limiting ring 62 is fixedly sleeved on the rotating cylinder 21. A long rod 7 is fixedly installed at the upper end of the toothed ring 6. An extension rod 72 is fixedly installed at the outer end of the long rod 7. A second threaded rod 74 is rotatably installed between the extension rod 72 and the long rod 7. A third servo motor 73 is fixedly installed on the long rod 7. The output shaft three of the third servo motor 73 is fixedly connected to the second threaded rod 74. A pushing rod 75 is slidably installed at the upper end of the extension rod 72. The pushing rod 75 movably penetrates through the long rod 7. One end of the pushing rod 75 is fixedly connected to a pushing block 76. The pushing block 76 is located inside the long rod 7. A rack 9 movably penetrates through the frame body 1. The rack 9 meshes with the toothed ring 6. One end of the rack 9 is fixedly installed with a contact rod 91. A rectangular plate 92 is fixedly sleeved on the rack 9. The rectangular plate 92 fits against the outer end of the frame body 1. An L-shaped plate 18 is fixedly connected to the outer end of the frame body 1. A second round rod 93 is fixedly connected between the L-shaped plate 18 and the frame body 1. A second spring 94 is movably sleeved on the second round rod 93. The second round rod 93 movably penetrates through the rectangular plate 92. The rectangular plate 92 is fixedly connected to the L-shaped plate 18 through the second spring 94. The contact rod 91 is located at the outer end of the L-shaped plate 18. The contact rod 91 is located on one side of the toothed ring 6. A second support arm 19 is fixedly installed at the end of the frame body 1. A connecting rod 31 is fixedly installed on the second support arm 19. A guiding plate 77 is fixedly installed at the end of the frame body 1. The guiding plate 77 is located on one side of the rotating cylinder 21.,

[0036] Working principle:

[0037] First step, during use, a plurality of valve bodies 52 are respectively placed between every two partition plates 12. A third servo motor for driving the conveyor belt 11 to roll is installed on the frame body 1. The conveyor belt 11 rolls to convey the valve bodies 52 to the notch. Then, the first motor 14 is started to make the first threaded rod 15 rotate. The rotation of the first threaded rod 15 drives the push rod 5 to move. The movement of the push rod 5 drives the two first U-shaped rings 51 to move. The movement of the two first U-shaped rings 51 pushes the valve body 52 to move from the feeding plate 17 to the rotating cylinder 21. The two second U-shaped rings 71 and the two first U-shaped rings 51 are designed with a dislocation. At this time, the two second U-shaped rings 71 and the two first U-shaped rings 51 are both sleeved on the valve body 52 to position the valve body 52 so that the valve body 52 is located at the center of the rotating cylinder 21. Then, the fixing assembly is used to fix the valve body 52. At this time, the third servo motor in the base 2 is started to make the rotating cylinder 21 rotate. The rotation of the rotating cylinder 21 makes the valve body 52 rotate. The welding assembly 3 is used to perform rotary inner ring automatic welding on the valve body 52;

[0038] In the second step, the valve bodies 52 can be transported in sequence by rolling the conveyor belt 11, and the valve bodies 52 on the conveyor belt 11 can be pushed onto the rotating drum 21 in sequence by moving the push rod 5 and the U-shaped ring 1 51, so as to realize the transportation and loading of multiple valves in sequence, and the telescopic rod 4 is moved upward by starting the electric push rod 4 23, and the push plate 4 is moved upward by the telescopic rod 4, and the three clamping blocks 42 are moved upward by the push plate 4, so that the three clamping blocks 42 are inserted into the valve body 52, and the three clamping blocks 42 are moved upward while driving the three The contact block 45 moves upward. When the contact block 45 contacts the surface of the push block 47, as the clamping block 42 and the contact block 45 move upward, the push block 47 applies a force to the contact block 45, so that the three clamping blocks 42 gradually move outward. The three clamping blocks 42 apply a force to the inside of the valve body 52. ​​The three clamping blocks 42 expand outward to clamp and fix the valve body 52, and the valve body 52 is automatically fixed. At this time, the rotation of the rotating drum 21 can drive the valve body 52 to rotate, so as to perform rotary inner ring automatic welding on the valve body 52.

[0039] In the third step, when the valve body 52 is pushed to move to the rotating drum 21, when the valve body 52 is about to be completely separated from the feeding plate 17, one end of the valve body 52 is already located in the two U-shaped rings 71. As the two U-shaped rings 51 continue to push, the valve body 52 is completely separated from the feeding plate 17, so that the valve body 52 is located between the two U-shaped rings 71 and the two U-shaped rings 51, so that the position of the valve body 52 is precisely defined, so that the valve body 52 can accurately reach the center of the rotating drum 21, so that the three clamping blocks 42 can be accurately inserted into the valve body 52 from the center hole 22, so that the valve body 52 can be clamped and fixed;

[0040] Fourthly, after welding a valve body 52, the push rod 5 and the U-shaped ring 1 51 move back to the initial state, and then the push rod 5 and the U-shaped ring 1 51 continue to move backward. The movement of the push rod 5 applies a force to the contact rod 91, causing the contact rod 91 to move backward. The backward movement of the contact rod 91 drives the rack 9 to move backward. The movement of the rack 9 drives the gear ring 6 to rotate. The rotation of the gear ring 6 drives the long rod 7 to rotate. The rotation of the long rod 7 drives the two U-shaped rings 2 71 to rotate 90 degrees with the center of the rotating cylinder 21 as the axis, so that the positions of the two U-shaped rings 2 71 correspond to the position of the material guiding plate 77. Then, start the electric push rod 4 23 to lower the push plate 4, so that the fixing component releases the fixation of the valve body 52. Then, start the servo motor 3 73 to rotate the threaded rod 2 74. The rotation of the threaded rod 2 74 drives the servo motor 3 73 to move. The movement of the servo motor 3 73 drives the push block 76 to move. The movement of the push block 76 pushes the valve body 52 to move, so that the valve body 52 is pushed to the material guiding plate 77 and slides out along the inclined direction of the material guiding plate 77, realizing the automatic blanking of the valve body 52 after welding. The whole blanking process is smooth and highly automated, reducing manual operation and labor intensity;

[0041] Fifthly, when the push rod 5 does not apply a force to the contact rod 91, by using the elastic reset function of the spring 2 94, the rack 9 is reset. The reset of the rack 9 resets the gear ring 6. The reset of the gear ring 6 resets the long rod 7 and the U-shaped ring 2 71, facilitating the subsequent positioning of the valve body 52. The spring 1 44 plays a role in resetting the clamping block 42, facilitating the subsequent clamping and fixing of the valve body 52. The two limit blocks 48 are respectively slidably installed in the limit grooves 24, playing a limiting role for the push plate 4, so that the push plate 4 can only move in the vertical direction. The structural design is reasonable;

[0042] Sixthly, start the electric push rod 2 38 to move the sliding rod 35 and the welding head 33 in the X-axis direction. The electric push rod 3 37 controls the connecting block 2 36 and the welding head 33 to move in the Y-axis direction. The electric push rod 1 34 controls the welding head 33 to move in the Z-axis direction, which can realize the flexible adjustment of the welding head 33 and is more convenient to use.

[0043] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A welding device for inner ring machining of a valve, comprising a frame body (1), characterized in that: A conveyor belt (11) is arranged inside the frame body (1). A number of partition plates (12) are evenly arranged on the conveyor belt (11). A valve body (52) is placed between each adjacent partition plate (12). Notches flush with the conveyor belt (11) are formed on both sides of the upper surface of the frame body (1). A base (2) is fixedly installed at the end of the frame body (1). A rotating cylinder (21) is rotatably installed at the upper end of the base (2). A welding assembly (3) is arranged above the rotating cylinder (21). Among them, the welding assembly (3) includes a connecting rod (31), a first connecting block (32) and a welding head (33). The welding head (33) is installed on the first connecting block (32). A fixing assembly is arranged inside the rotating cylinder (21). The fixing assembly includes a push plate (4). Three clamping blocks (42) for fixing the valve body (52) are arranged on the push plate (4) at equal circumferential intervals. A pushing assembly is arranged on the frame body (1). The pushing assembly includes a pushing rod (5). Two first U-shaped rings (51) are fixedly installed on the pushing rod (5). Among them, a positioning assembly is arranged on the rotating cylinder (21). The positioning assembly includes a long rod (7). Two second U-shaped rings (71) are fixedly installed on the long rod (7). The opening directions of the two second U-shaped rings (71) are opposite to those of the two first U-shaped rings (51). A servo motor two for driving the rotating cylinder (21) to rotate is fixedly installed inside the base (2). A central hole (22) is formed on the upper surface of the rotating cylinder (21). An electric push rod four (23) is fixedly installed on the bottom wall of the inner cavity of the base (2). A push plate (4) is slidably installed inside the rotating cylinder (21). Among them, the telescopic rod four of the electric push rod four (23) is fixedly connected to the middle of the bottom end of the push plate (4). Three sliding grooves (41) are formed on the upper surface of the push plate (4) at equal circumferential intervals. The bottom end of each clamping block (42) is respectively slidably installed in the sliding groove (41). A first support arm (13) is fixedly installed at the end of the frame body (1). A first motor (14) is fixedly installed on the first support arm (13). A first threaded rod (15) is fixedly connected to the output shaft one of the first motor (14). The first threaded rod (15) penetrates through the pushing rod (5) and is in threaded connection with the pushing rod (5). Among them, a limiting rod (16) is fixedly installed on the first support arm (13). The limiting rod (16) movably penetrates through the pushing rod (5). A feeding plate (17) is fixedly installed at the end of the frame body (1). The feeding plate (17) is located at the notch far from the first support arm (13). The base (2) is located on one side of the feeding plate (17). A toothed ring (6) is movably sleeved on the rotary drum (21). An annular groove (61) is formed in the inner wall of the toothed ring (6). A limiting ring (62) is arranged in the annular groove (61). The limiting ring (62) is fixedly sleeved on the rotary drum (21). A long rod (7) is fixedly installed at the upper end of the toothed ring (6). An extension rod (72) is fixedly installed at the outer end of the long rod (7). A second threaded rod (74) is rotatably installed between the extension rod (72) and the long rod (7). Among them, a third servo motor (73) is fixedly installed on the long rod (7). The output shaft three of the third servo motor (73) is fixedly connected to the second threaded rod (74). A pushing rod (75) is slidably installed at the upper end of the extension rod (72). The pushing rod (75) movably penetrates through the long rod (7). One end of the pushing rod (75) is fixedly connected to a pushing block (76). The pushing block (76) is located inside the long rod (7). A rack (9) movably penetrates through the frame body (1). The rack (9) meshes with the toothed ring (6). A contact rod (91) is fixedly installed at one end of the rack (9). A rectangular plate (92) is fixedly sleeved on the rack (9). The rectangular plate (92) is attached to the outer end of the frame body (1). Among them, an L-shaped plate (18) is fixedly connected to the outer end of the frame body (1). A second round rod (93) is fixedly connected between the L-shaped plate (18) and the frame body (1). A second spring (94) is movably sleeved on the second round rod (93). A sliding rod (35) is slidably installed in the connecting rod (31). A second connecting block (36) is slidably installed on the sliding rod (35). An electric push rod one (34) is fixedly installed at the bottom end of the second connecting block (36). The telescopic rod one of the electric push rod one (34) is fixedly connected to the first connecting block (32). Among them, an electric push rod two (38) is fixedly installed on the connecting rod (31). The telescopic rod two of the electric push rod two (38) is fixedly connected to the sliding rod (35). An electric push rod three (37) is fixedly installed on the sliding rod (35). The telescopic rod three of the electric push rod three (37) is fixedly connected to the second connecting block (36). A first round rod (43) is fixedly installed in each chute (41). A first spring (44) is movably sleeved on each first round rod (43). Each clamping block (42) is fixedly connected to the inner wall of the chute (41) through the first spring (44). Among them, a contact block (45) is fixedly installed on the inner side of each clamping block (42). The second round rod (93) movably penetrates through the rectangular plate (92). The rectangular plate (92) is fixedly connected to the L-shaped plate (18) through the second spring (94). The contact rod (91) is located at the outer end of the L-shaped plate (18). The contact rod (91) is located on one side of the toothed ring (6).

2. A welding device for inner ring machining of a valve according to claim 1, characterized in that: A fixing block (46) is fixedly installed inside the center hole (22). Three pushing blocks (47) are fixedly installed on the fixing block (46) at equal circumferential intervals. Each of the pushing blocks (47) and each of the contact blocks (45) are triangular in shape. Each of the pushing blocks (47) is located above the contact block (45). Among them, limiting grooves (24) are formed in both inner walls of the rotating cylinder (21). Limiting blocks (48) are fixedly installed at both ends of the pushing plate (4). Each of the limiting blocks (48) is slidably installed in the limiting groove (24).

3. A welding device for inner ring machining of a valve according to claim 1, characterized in that: An arm two (19) is fixedly installed at the end of the frame body (1). The connecting rod (31) is fixedly installed on the arm two (19). Among them, a material guiding plate (77) is fixedly installed at the end of the frame body (1). The material guiding plate (77) is located on one side of the rotating cylinder (21).

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