A welding device for fire extinguisher canisters

Abstract

This invention discloses a welding device for fire extinguisher canisters, comprising a positioning mechanism, a clamping mechanism, a power component, a welding mechanism, and a frame. The positioning mechanism includes a drive seat, a transmission component, and three positioning rods. Two drive seats are provided, each comprising a base, a rotating seat, and a fixed seat. The fixed seat is fixedly connected to the base by bolts. The rotating seat is rotatably disposed within the base, and three sliding seats are equidistantly distributed along the center direction of the fixed seat. The two ends of the positioning rods are respectively installed in the two sliding seats. The fixed seat is provided with a through groove to avoid the positioning rods, and the sliding seats are provided with a first protruding rod. This invention uses three positioning rods to first position and clamp the three components of the fire extinguisher canister, ensuring that their axes are collinear. Then, the fire extinguisher canister is clamped by the clamping rods before welding, which can effectively improve welding efficiency while ensuring welding quality.

Description

Technical Field

[0001] This invention discloses a welding device for fire extinguisher canisters, belonging to the field of fire-fighting equipment manufacturing technology. Background Technology

[0002] The production of existing fire extinguisher canisters typically involves welding three parts: the canister opening (1), the canister body (2), and the canister bottom (3). Traditional welding processes require two steps: first, welding the canister body (2) to the canister opening (1) (or the canister bottom (3)). Figure 1 At point A (middle arrow), weld another component. Figure 1 At position B (center arrow), this method has the following drawbacks: First, it requires two clamping operations, which is cumbersome and results in low welding efficiency; second, the two clamping operations are prone to positioning errors, causing the axes of the can opening 1, can body 2, and can bottom 3 to shift (misalign), affecting the uniformity of the weld and the appearance quality of the product. Therefore, there is an urgent need for a welding device that can clamp and weld simultaneously in one operation and ensure the coaxiality of the three components. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and to provide a welding device for fire extinguisher canisters.

[0004] The present invention achieves the above-mentioned objective through the following technical solution: a fire extinguisher canister welding device, comprising:

[0005] The positioning mechanism includes a drive seat, a transmission assembly, and three positioning rods. Two drive seats are provided, each comprising a base, a rotating seat, and a fixed seat. The fixed seat is bolted to the base. The rotating seat is rotatably mounted within the base, and three sliding seats are equidistantly distributed along the center direction of the fixed seat. The two ends of each positioning rod are respectively installed within two of the sliding seats. The fixed seat has a through groove to avoid the positioning rod. The sliding seats have a first protrusion, and the rotating seat has an arc-shaped groove that mates with the first protrusion. The two ends of the arc-shaped groove are unequally distanced from the center of the rotating seat. The transmission assembly is installed at the center of the base and the rotating seat.

[0006] The clamping mechanism is provided in two sets. The clamping mechanism includes a cylinder and a clamping rod. One end of the clamping rod is rotatably connected to the piston of the cylinder, and the other end passes through the transmission assembly and the drive seat.

[0007] A power unit is used to drive the transmission assembly or clamping rod to rotate, so as to drive the rotating seat to rotate when the transmission assembly rotates or drive the fire extinguisher canister to rotate when the clamping rod rotates.

[0008] A welding mechanism, comprising a fixed rod and two welding components, the two welding components being slidably mounted on the fixed rod;

[0009] The frame is used to mount the positioning mechanism, clamping mechanism, power assembly and welding mechanism.

[0010] Preferably, the fixed seat is provided with a first sliding groove, the sliding seat is slidably disposed in the first sliding groove, and the sliding seat is also provided with a damping element, the damping element including a first limiting bolt, a first spring and a limiting sleeve, the two ends of the positioning rod are provided with positioning platforms with a non-circular cross-section, the sliding seat is provided with a second sliding groove for the positioning platforms to slide, one end of the first limiting bolt passes through the sliding seat and the limiting sleeve and is fixedly connected to the positioning platform, the first spring is sleeved on the outside of the first limiting bolt, and the two ends of the first spring abut against the sliding seat and the limiting sleeve respectively.

[0011] Preferably, the power assembly includes a motor, a transmission rod, a pulley assembly, and a fixing block. The pulley assembly has two sets, including a driving pulley, a driven pulley, and a belt. The frame has a mounting cavity, and the fixing block is fixed to the side wall of the mounting cavity. The driving pulley is fixed to the transmission rod, and the output shaft of the motor is fixedly connected to one end of the transmission rod. The driven pulley is rotatably mounted on the fixing block, and the belt is sleeved on the outside of the driving pulley and the driven pulley. The transmission assembly and the clamping rod cooperate with both sides of the driven pulley for transmission.

[0012] Preferably, the transmission assembly includes a first movable member, a second movable member, and a second spring. The first movable member passes through the rotating seat and the base and is fixedly connected to the second movable member by bolts. The first movable member has a stepped shaft structure, and a plurality of second protrusions are provided on the side of it near the rotating seat. The rotating seat is provided with a first positioning hole that mates with the second protrusions. One end of the second protrusion is always located in the first positioning hole. A third protrusion is provided on the side of the second movable member near the driven pulley. The driven pulley is provided with a second positioning hole that mates with the third protrusion. The second spring is sleeved on the outside of the first movable member, and the second spring applies a force to the second movable member near the driven pulley.

[0013] Preferably, wear-resistant plates are provided on both sides of the second spring, and a limit protrusion is provided on the side of the wear-resistant plate near the second spring.

[0014] Preferably, the clamping rod has a stepped rod structure, with its larger diameter end located on the side of the driven pulley away from the transmission assembly, and its smaller diameter end passing through the driven pulley and the transmission assembly. The clamping rod is provided with a pressing platform for pushing the transmission assembly away from the driven pulley, and the end of the clamping rod away from the driven pulley is also provided with an elastic pressing member. The side of the clamping rod that contacts the driven pulley has a friction plate.

[0015] Preferably, the elastic clamping component includes a pressure block, a second limiting bolt, and a third spring. The pressure block is provided with a recess, one end of the second limiting bolt is located in the recess, and the other end passes through the pressure block and is fixedly connected to the clamping rod. The third spring is located in the clamping rod, and the third spring applies a force to the pressure block away from the clamping rod.

[0016] Preferably, the clamping rod is further provided with a mounting boss, and the piston of the cylinder is provided with a movable sleeve that is rotatably configured with the mounting boss.

[0017] Preferably, the positioning mechanism further includes a reset assembly, which is provided in three sets, including an arc rod, a fourth spring, a stop block, and a mounting block. One end of the arc rod has a limiting platform, and the rotating seat has a groove on the side near the base. The limiting platform is located inside the mounting block, and the mounting block is fixed to the rotating seat by bolts. The base has a positioning groove for mounting the stop block, and the stop block is slidably disposed with the arc rod. The fourth spring is sleeved on the arc rod, and both ends of the fourth spring abut against the stop block and the mounting block, respectively.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. High coaxiality: First, the tank opening, tank body, and tank bottom are radially positioned and pre-clamped using positioning rods. Then, axial clamping is performed using pressure blocks. The radial positioning remains constrained until the axial clamping is in place, ensuring that the axes of the tank opening, tank body, and tank bottom are aligned before final clamping, avoiding misalignment and guaranteeing welding quality.

[0020] 2. High efficiency: Two welding components are used to weld two circumferential welds simultaneously, and the entire welding can be completed by rotating the tank opening, tank body and tank bottom once by the power component, which significantly improves production efficiency.

[0021] 3. Simple and reasonable design: Through the ingenious synchronous release component design, the continuous action of "radial pre-clamping → axial clamping → radial automatic release" is realized, avoiding interference between the positioning rod and the outer wall of the tank during welding. The structure is compact and the control logic is simple. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the components of a fire extinguisher canister.

[0023] Figure 2 This is a schematic diagram of the structure of a welding device for a fire extinguisher canister according to the present invention;

[0024] Figure 3 This is a cross-sectional view of a fire extinguisher canister welding device according to the present invention;

[0025] Figure 4This is a schematic diagram of the internal structure of the positioning mechanism and the clamping mechanism in this invention;

[0026] Figure 5 This is a partial structural diagram of the drive seat and clamping mechanism in this invention;

[0027] Figure 6 This is a schematic diagram of the clamping rod and transmission assembly in this invention;

[0028] Figure 7 This is a schematic diagram of the structure of the sliding seat and the positioning rod in this invention;

[0029] Figure 8 This is a schematic diagram of the structure of the base, rotating seat, and reset assembly in this invention;

[0030] Figure 9 This is a schematic diagram of the structure of the fixing base in this invention;

[0031] Figure 10 This is a schematic diagram of the rotating seat in this invention;

[0032] Figure 11 This is a schematic diagram of the structure of the arc rod and the fourth spring in this invention;

[0033] Figure 12 This is a schematic diagram of the base structure in this invention;

[0034] Reference numerals: 1. Can opening; 2. Can body; 3. Can bottom; 4. Motor; 5. Cylinder; 6. Fixed rod; 7. Positioning rod; 8. Welding assembly; 9. Drive seat; 10. Frame; 11. Transmission rod; 12. Drive pulley; 13. Belt; 14. Driven pulley; 15. Fixed block; 16. Clamping rod; 17. Elastic clamping element; 18. Transmission assembly; 19. Power assembly; 20. Mounting boss; 21. Movable sleeve; 22. Friction plate; 23. Second movable part; 24. Base; 25. First protruding rod; 26. Sliding seat; 27. First movable part; 28. Second limit bolt; 29. ​​Pressure... 30. Block; 31. Third spring; 32. Positioning groove; 33. Fixed seat; 34. Reset assembly; 35. Rotating seat; 36. Second spring; 37. Wear-resistant plate; 38. Arc groove; 39. Second protruding rod; 40. Damping component; 41. Second positioning hole; 42. Third protruding rod; 43. Positioning platform; 44. Limiting sleeve; 45. First limiting bolt; 46. First spring; 47. Arc rod; 48. Fourth spring; 49. Mounting block; 50. Stop block; 51. Through groove; 52. First sliding groove; 53. Second sliding groove; 54. First positioning hole; 55. Groove; 56. Limiting platform; 57. Pressing platform. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] like Figures 1-12 As shown, a fire extinguisher canister welding device includes a positioning mechanism, a clamping mechanism, a power component 19, a welding mechanism, and a frame 10. The positioning mechanism includes a drive seat 9, a transmission component 18, and three positioning rods 7. Two drive seats 9 are provided, each including a base 24, a rotating seat 34, and a fixed seat 32. The fixed seat 32 is bolted to the base 24. The rotating seat 34 is rotatably mounted within the base 24. Three sliding seats 26, evenly distributed along the center direction, are slidably mounted on the fixed seat 32. The two ends of the positioning rods 7 are respectively installed within two of the sliding seats 26. The fixed seat 32 has a through groove 50 to avoid the positioning rods 7. A first protrusion 25 is provided on each sliding seat 26, and a part cooperating with the first protrusion 25 is provided on the rotating seat 34. The arc-shaped groove 37 has unequal distances from its two ends to the center of the rotating seat 34. The transmission assembly 18 is installed at the center of the base 24 and the rotating seat 34. Two clamping mechanisms are provided, each including a cylinder 5 and a clamping rod 16. One end of the clamping rod 16 is rotatably connected to the piston of the cylinder 5, and the other end passes through the transmission assembly 18 and the drive seat 9. The power assembly 19 is used to drive the transmission assembly 18 or the clamping rod 16 to rotate, so that the rotating seat 34 rotates when the transmission assembly 18 rotates or the fire extinguisher canister rotates when the clamping rod 16 rotates. The welding mechanism includes a fixed rod 6 and two welding assemblies 8, which are slidably mounted on the fixed rod 6. The frame 10 is used to install the positioning mechanism, the clamping mechanism, the power assembly 19, and the welding mechanism.

[0037] The fixed seat 32 is provided with a first slide groove 51, and the sliding seat 26 is slidably disposed in the first slide groove 51. The sliding seat 26 is also provided with a damping element 39, which includes a first limiting bolt 44, a first spring 45, and a limiting sleeve 43. The positioning rod 7 has positioning platforms 42 with non-circular cross-sections at both ends. The sliding seat 26 is provided with a second slide groove 52 for the positioning platforms 42 to slide in. One end of the first limiting bolt 44 passes through the sliding seat 26 and the limiting sleeve 43 and is fixedly connected to the positioning platform 42. The first spring 45 is sleeved on the outside of the first limiting bolt 44, and both ends of the first spring 45 abut against the sliding seat 26 and the limiting sleeve 43, respectively. When the transmission assembly... When component 18 drives the rotating seat 34 to rotate, the arc grooves 37 on the two rotating seats 34 drive the first protrusions 25 on both sides of the same positioning rod 7 to move towards the center of the rotating seat 34. This allows the three positioning rods 7 to center and maintain the pre-clamped state after center positioning of the can opening 1, can body 2 and can bottom 3. When the positioning rod 7 contacts the can opening 1, can body 2 and can bottom 3, if the power component 19 can still drive the rotating seat 34 to rotate, the sliding seat 26 can continue to slide, while the positioning rod 7 remains stationary, so that the first spring 45 is continued to be compressed. This can prevent the positioning rod 7 from causing excessive squeezing force on the can opening 1, can body 2 and can bottom 3, resulting in deformation or misalignment.

[0038] The power assembly 19 includes a motor 4, a transmission rod 11, a pulley assembly, and a fixing block 15. The pulley assembly has two sets, each including a driving pulley 12, a driven pulley 14, and a belt 13. A mounting cavity is provided within the frame 10. The fixing block 15 is fixed to the side wall of the mounting cavity. The driving pulley 12 is fixed to the transmission rod 11. The output shaft of the motor 4 is fixedly connected to one end of the transmission rod 11. The driven pulley 14 is rotatably mounted on the fixing block 15. The belt 13 is sleeved on the driving pulley 12 and the driven pulley 14. On the outside of 4, the transmission assembly 18 and the clamping rod 16 respectively cooperate with the two sides of the driven pulley 14 for transmission. When the motor 4 drives the transmission rod 11 to rotate, it can drive the driving pulley 12 to rotate, and drive the driven pulley 14 to rotate by the belt 13. The driven pulley 14 is rotated on the fixed block 15 by the snap ring. It will not move when subjected to the horizontal force of the clamping rod 16 or the transmission assembly 18, so that the driven pulley 14 can transmit power to the clamping rod 16 or the rotating seat 34.

[0039] The transmission assembly 18 includes a first movable member 27, a second movable member 23, and a second spring 35. The first movable member 27 passes through the rotating seat 34 and the base 24 and is fixedly connected to the second movable member 23 by bolts. The first movable member 27 has a stepped shaft structure, and multiple second protrusions 38 are provided on its side near the rotating seat 34. The rotating seat 34 is provided with a first positioning hole 53 that mates with the second protrusions 38. One end of the second protrusion 38 is always located in the first positioning hole 53. The second movable member 23 is located near the base 24. A third protrusion 41 is provided on one side of the driven pulley 14. A second positioning hole 40 is provided on the driven pulley 14 to cooperate with the third protrusion 41. A second spring 35 is sleeved on the outside of the first movable member 27, and the second spring 35 applies a force to the second movable member 23 near the driven pulley 14. Wear-resistant plates 36 are provided on both sides of the second spring 35. A limit protrusion is provided on the side of the wear-resistant plate 36 near the second spring 35. The positioning rod 7 is used to position and clamp the can opening 1, the can body 2, and the can bottom 3. Previously, the third protrusion 41 on the second movable member 23 was kept inserted into the second positioning hole 40 under the action of the second spring 35. If one end of the third protrusion 41 was misaligned with the second positioning hole 40, the third protrusion 41 and the second positioning hole 40 could be aligned when the driven pulley 14 rotated a certain angle, thus achieving the engagement of the two. Subsequently, the motor 4 drove the driven pulley 14 to rotate, so that the second movable member 23 and the first movable member 27 rotated synchronously. Relying on the cooperation between the second protrusion 38 on the first movable member 27 and the first positioning hole 53 on the rotating seat 34, the driven pulley 14 drove the rotating seat 34 to rotate. In this way, when the arc groove 37 rotated with the rotating seat 34, it could force the first protrusion 25 to drive the sliding seat 26 to slide towards the center of the rotating seat 34, thereby driving the positioning rod 7 to position and pre-clamp the can opening 1, the can body 2, and the can bottom 3. The limiting protrusion is used to position the second spring 35 to prevent misalignment or falling off during assembly.

[0040] The clamping rod 16 has a stepped rod structure, with its larger diameter end located on the driven pulley 14 away from the transmission assembly 18, and its smaller diameter end passing through the driven pulley 14 and the transmission assembly 18. The clamping rod 16 is equipped with a pressure plate 56 for pushing the transmission assembly 18 away from the driven pulley 14, and an elastic pressing element 17 is also provided at the end of the clamping rod 16 away from the driven pulley 14. A friction plate 22 is provided on the side of the clamping rod 16 that contacts the driven pulley 14. After the positioning rod 7 positions and clamps the can opening 1, can body 2, and can bottom 3, the cylinder 5 first drives the clamping rod 16 to move, thus pressing... Block 29 abuts against the can opening 1 and the can bottom 3, bringing the three together tightly. It also exerts a pressing effect on the can opening 1, the can body 2, and the can bottom 3. Subsequently, the pressure table 56 abuts against the second movable part 23 as the clamping rod 16 moves, and drives the third protrusion 41 on the second movable part 23 to disengage from the second positioning hole 40. Then, the friction plate 22 on the side of the clamping rod 16 abuts tightly against the side of the driven pulley 14. Thus, when the driven pulley 14 rotates, it can drive the clamping rod 16 and the pressure block 29 to rotate synchronously, so that the can opening 1, the can body 2, and the can bottom 3 also rotate together, thereby facilitating subsequent welding.

[0041] The elastic clamping component 17 includes a pressure block 29, a second limiting bolt 28, and a third spring 30. The pressure block 29 has a recessed groove. One end of the second limiting bolt 28 is located within the recessed groove, and the other end passes through the pressure block 29 and is fixedly connected to the clamping rod 16. The third spring 30 is located within the clamping rod 16 and applies a force to the pressure block 29 away from the clamping rod 16. The clamping rod 16 also has a mounting boss 20. The piston of the cylinder 5 has a movable sleeve 21 that rotates with the mounting boss 20. When the cylinder 5 drives the clamping rod 16 to clamp the can opening 1, can body 2, and can bottom 3, the pressure block 29 contacts the can opening 1 and can bottom 3 until the friction plate 22... When the third spring 30 comes into contact with the side of the driven pulley 14, it is continuously compressed during this process, which increases the force of the pressure block 29 on the can opening 1 and the can bottom 3. When the gap between the can opening 1, the can body 2 and the can bottom 3 is large, the pressure block 29 can push the can opening 1 and the can bottom 3 towards the can body 2 and make the three of them come into tight contact, so that welding can be carried out smoothly. When the driven pulley 14 drives the clamping rod 16 to rotate, the can opening 1, the can body 2 and the can bottom 3 can rotate together synchronously. By relying on the cooperation of the mounting boss 20 and the movable sleeve 21, the clamping rod 16 can be kept rotating, while the piston of the cylinder 5 will not rotate, and it can only drive the clamping rod 16 to move horizontally.

[0042] The positioning mechanism also includes a reset assembly 33, which has three sets, including an arc rod 46, a fourth spring 47, a stop block 49, and a mounting block 48. One end of the arc rod 46 has a limiting platform 55. The rotating seat 34 has a groove 54 on the side near the base 24. The limiting platform 55 is located inside the mounting block 48, which is fixed to the rotating seat 34 by bolts. The base 24 has a positioning groove 31 for mounting the stop block 49. The stop block 49 is slidably disposed with the arc rod 46. The fourth spring 47 is sleeved on the arc rod 46, and both ends of the fourth spring 47 abut against the stop block 49 and the mounting block 48, respectively. When the rotating seat 34 rotates, the mounting block 48 and the arc rod 46 rotate accordingly. The rotating seat 34 rotates synchronously, while the stop block 49 remains stationary with the base 24. Thus, when the rotating seat 34 drives the positioning rod 7 to pre-clamp the can opening 1, can body 2, and can bottom 3, the fourth spring 47 is compressed and in a stored state. After the clamping rod 16 and the pressure block 29 press the can opening 1, can body 2, and can bottom 3 together, the pressure plate 56 on the clamping rod 16 drives the third protrusion 41 on the second movable part 23 to disengage from the second positioning hole 40. At the same moment, the fourth spring 47 drives the rotating seat 34 to rotate and reset, so that the first protrusion 25 drives the sliding seat 26 to move away from the center of the rotating seat 34, so that the positioning rod 7 moves away from the can opening 1, can body 2, and can bottom 3, thereby facilitating welding of the three parts.

[0043] Working principle: During welding, use both hands to first connect the mouth 1, body 2, and bottom 3 of the fire extinguisher canister in sequence. Then, maintain this position and place it between the three positioning rods 7. By stepping on the control switch of the motor 4, the power component 19 drives the transmission component 18 to rotate. This allows the rotating seat 34 to move the three positioning rods 7 towards the center, thereby centering and pre-clamping the mouth 1, body 2, and bottom 3. Then, turn off the motor 4 and release both hands. During the pre-clamping process of the mouth 1, body 2, and bottom 3, the rotating seat 34 rotates a certain angle, causing the fourth spring 47 to start storing force, and then continues... Keep the positioning rod 7 clamped to the outer wall of the can opening 1, can body 2 and can bottom 3. Let the two cylinders 5 drive the two clamping rods 16 to move towards the can opening 1 and can bottom 3 respectively. When the two pressure blocks 29 touch the can opening 1 and can bottom 3, continue to push the can opening 1 and can bottom 3 to slide towards the can body 2 until the three finally touch and cannot move, and are clamped by the pressure blocks 29. At this time, the pressure table 56 has not yet driven the third protruding rod 41 on the second moving part 23 to disengage from the second positioning hole 40 on the driven pulley 14. The output shaft of the motor 4 cannot be rotated due to the brake self-locking device, so the rotating seat 34 cannot drive the positioning rod 7 to reset under the elastic force of the fourth spring 47.

[0044] When cylinder 5 drives the clamping rod 16 to move, the pressure table 56 drives the third protrusion 41 on the second movable part 23 to disengage from the driven second positioning hole 40. At this time, the rotating seat 34 is no longer restricted and rotates back to its original position under the action of the fourth spring 47, causing the positioning rod 7 to disengage from the contact with the can opening 1, can body 2, and can bottom 3. Then, cylinder 5 drives the wear-resistant plate 36 on the clamping rod 16 to fully contact the driven pulley 14. At this time, the pressure block 29 exerts maximum pressure on the can opening 1, can body 2, and can bottom 3. Before this, the can opening 1, can body 2, and can bottom 3 will not move. Then, the welding assembly 8 is allowed to connect with the two adjacent parts. The gaps formed between the components are aligned, and two welding components 8 weld the two gaps simultaneously. The power component 19 drives the clamping rod 16, the can opening 1, the can body 2, and the can bottom 3 to rotate synchronously by the friction plate 22. This enables circumferential welding. In this way, before the can opening 1, the can body 2, and the can bottom 3 are fully clamped, the positioning rod 7 is used to align and pre-clamp them, so that the axes of the three can remain coaxial. This ensures that the size of the weld seam is basically consistent during welding, thus effectively guaranteeing the welding quality. Furthermore, the simultaneous welding of the two gaps of the three components can greatly improve the welding efficiency.

[0045] After welding is completed, the cylinder 5 drives the clamping rod 16 and the pressure block 29 to reset, so that the welded fire extinguisher canister can be removed. At this time, the second movable part 23 and the first movable part 27 are reset under the action of the second spring 35. When the third protrusion 41 is misaligned with the second positioning hole 40, the motor 4 drives the driven pulley 14 to rotate so that the second positioning hole 40 and the third protrusion 41 are aligned and can fit together. This allows the parts of the next fire extinguisher canister to be positioned and clamped.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A welding device for fire extinguisher canisters, characterized in that, include: The positioning mechanism includes a drive seat (9), a transmission assembly (18), and three positioning rods (7). Two drive seats (9) are provided, each including a base (24), a rotating seat (34), and a fixed seat (32). The fixed seat (32) is fixedly connected to the base (24) by bolts. The rotating seat (34) is rotatably disposed within the base (24), and three sliding seats (26) are equidistantly distributed along the center direction on the fixed seat (32). The two ends of the positioning rod (7) are respectively installed in the two sliding seats (26). The fixed seat (32) is provided with a through groove (50) to avoid the positioning rod (7). The sliding seat (26) is provided with a first protrusion (25). The rotating seat (34) is provided with an arc groove (37) that cooperates with the first protrusion (25). The two ends of the arc groove (37) are not equidistant from the center of the rotating seat (34). The transmission component (18) is installed at the center of the base (24) and the rotating seat (34). The clamping mechanism is provided in two sets. The clamping mechanism includes a cylinder (5) and a clamping rod (16). One end of the clamping rod (16) is rotatably connected to the piston of the cylinder (5), and the other end passes through the transmission assembly (18) and the drive seat (9). A power assembly (19) is used to drive the transmission assembly (18) or the clamping rod (16) to rotate, so as to drive the rotating seat (34) to rotate when the transmission assembly (18) rotates or to drive the fire extinguisher canister to rotate when the clamping rod (16) rotates. The welding mechanism includes a fixed rod (6) and two welding components (8), which are slidably disposed on the fixed rod (6); A frame (10) for mounting a positioning mechanism, a clamping mechanism, a power assembly (19) and a welding mechanism; The power assembly (19) includes a motor (4), a transmission rod (11), a pulley group and a fixing block (15). The pulley group is provided in two sets, including a driving pulley (12), a driven pulley (14) and a belt (13). The frame (10) is provided with an installation cavity. The fixing block (15) is fixed to the side wall of the installation cavity. The driving pulley (12) is fixed on the transmission rod (11). The output shaft of the motor (4) is fixedly connected to one end of the transmission rod (11). The driven pulley (14) is rotatably mounted on the fixing block (15). The belt (13) is sleeved on the outside of the driving pulley (12) and the driven pulley (14). The transmission assembly (18) and the clamping rod (16) cooperate with the two sides of the driven pulley (14) for transmission. The transmission assembly (18) includes a first movable part (27), a second movable part (23), and a second spring (35). The first movable part (27) passes through the rotating seat (34) and the base (24) and is fixedly connected to the second movable part (23) by bolts. The first movable part (27) has a stepped shaft structure and a plurality of second protrusions (38) are provided on the side of it near the rotating seat (34). The rotating seat (34) is provided with a first positioning hole (53) that cooperates with the second protrusions (38). One end of the second protrusion (38) is always located in the first positioning hole (53). The second movable part (23) is provided with a third protrusion (41) on the side of it near the driven pulley (14). The driven pulley (14) is provided with a second positioning hole (40) that cooperates with the third protrusion (41). The second spring (35) is sleeved on the outside of the first movable part (27) and the second spring (35) applies a force to the second movable part (23) near the driven pulley (14). The clamping rod (16) has a stepped rod structure, with its larger diameter end located on the side of the driven pulley (14) away from the transmission assembly (18), and its smaller diameter end passing through the driven pulley (14) and the transmission assembly (18). The clamping rod (16) is provided with a pressing platform (56) for pushing the transmission assembly (18) away from the driven pulley (14), and the end of the clamping rod (16) away from the driven pulley (14) is also provided with an elastic pressing member (17). The side of the clamping rod (16) that abuts against the driven pulley (14) has a friction plate (22). The elastic clamping component (17) includes a pressure block (29), a second limiting bolt (28), and a third spring (30). The pressure block (29) is provided with a groove. One end of the second limiting bolt (28) is located in the groove, and the other end passes through the pressure block (29) and is fixedly connected to the clamping rod (16). The third spring (30) is located in the clamping rod (16), and the third spring (30) applies a force to the pressure block (29) away from the clamping rod (16).

2. The fire extinguisher canister welding device according to claim 1, characterized in that, The fixed seat (32) is provided with a first sliding groove (51), the sliding seat (26) is slidably disposed in the first sliding groove (51), and the sliding seat (26) is also provided with a damping element (39). The damping element (39) includes a first limiting bolt (44), a first spring (45) and a limiting sleeve (43). The two ends of the positioning rod (7) are provided with positioning platforms (42) with non-circular cross-sections. The sliding seat (26) is provided with a second sliding groove (52) for the positioning platform (42) to slide. One end of the first limiting bolt (44) passes through the sliding seat (26) and the limiting sleeve (43) and is fixedly connected to the positioning platform (42). The first spring (45) is sleeved on the outside of the first limiting bolt (44), and the two ends of the first spring (45) abut against the sliding seat (26) and the limiting sleeve (43) respectively.

3. The fire extinguisher canister welding device according to claim 1, characterized in that, Wear-resistant plates (36) are provided on both sides of the second spring (35), and the wear-resistant plates (36) are provided with limit protrusions on the side of the second spring (35).

4. The fire extinguisher canister welding device according to claim 1, characterized in that, The clamping rod (16) is also provided with a mounting boss (20), and the piston of the cylinder (5) is provided with a movable sleeve (21) that is rotatably configured with the mounting boss (20).

5. The fire extinguisher canister welding device according to claim 1, characterized in that, The positioning mechanism also includes a reset assembly (33), which is provided in three sets, including an arc rod (46), a fourth spring (47), a stop block (49), and a mounting block (48). One end of the arc rod (46) has a limiting platform (55). The rotating seat (34) has a groove (54) on the side near the base (24). The limiting platform (55) is located inside the mounting block (48). The mounting block (48) is fixed to the rotating seat (34) by bolts. The base (24) is provided with a positioning groove (31) for mounting the stop block (49). The stop block (49) is slidably disposed with the arc rod (46). The fourth spring (47) is sleeved on the arc rod (46), and the two ends of the fourth spring (47) abut against the stop block (49) and the mounting block (48) respectively.

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