Welding device for fire extinguisher

Abstract

The welding device for the fire extinguisher relates to the technical field of welding equipment and comprises a machine tool assembly, the machine tool assembly comprises a machine tool body and a movable mounting frame, the movable mounting frame is slidably mounted on the top face of the machine tool body, rotating calipers are rotatably mounted at the end of the machine tool body, and a welding assembly is slidably mounted on the top face of the machine tool body; the welding assembly comprises a welding gun body, a detection assembly is coaxially installed at the end, close to the rotating calipers, of the movable installation frame, and a fire extinguisher body is jointly installed between the detection assembly and the rotating calipers. A coherent closed-loop operation process from automatic clamping and precise welding of a fire extinguisher body to post-welding airtightness detection is realized, the automation degree and the production takt of a production line are remarkably improved, the manual intervention frequency is reduced, and the consistency and the reliability of welding and detection are improved; and meanwhile, the clamping stability, the welding posture adjusting capacity and the airtightness detection responsiveness of the workpiece are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding equipment, in particular to a welding device for fire extinguishers. BACKGROUND

[0002] In the production process of existing fire extinguishers, the bottle body is usually formed into an integrated structure by welding the front end shell and the rear end shell. Since the fire extinguisher bottle body is usually made of thin-walled metal material, it is necessary to ensure the strength and forming quality of the weld, as well as the air tightness of the weld, to prevent leakage during subsequent filling of fire extinguishing agent. The traditional welding process mainly adopts manual positioning and manual welding, which requires the operator to manually fix the fire extinguisher body on the machine tool and adjust the welding gun angle by visual observation for welding. This method is labor-intensive and difficult to guarantee the positioning accuracy and welding stability, which may easily cause weld offset or local burning problems.

[0003] In the existing production line, some manufacturers have equipped with automatic rotating clamps or semi-automatic welding equipment, but most of them only realize the rotation of the fire extinguisher body to facilitate welding, and the clamping of the front end shell of the fire extinguisher still relies on the rigid jaw structure. This structure is prone to cause surface indentation or loosening of the shell when the stress is uneven or the deformation is large, which affects the coaxiality and uniformity of the weld. At the same time, after welding is completed, it often needs to be transferred to an independent detection station for air tightness detection, which is not closely linked in the process, and there is idle running and waiting between equipment, resulting in low overall production rhythm.

[0004] Therefore, the existing fire extinguisher welding device generally has problems such as unstable welding positioning, delayed air tightness detection of the weld, and insufficient automation. How to realize the automatic clamping, precise welding and post-welding air tightness detection of the fire extinguisher body on the same machine tool platform has become a technical problem to be solved in the field of fire extinguisher production equipment. SUMMARY

[0005] The present application aims to provide a welding device for fire extinguishers to solve the problems mentioned in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a machine tool assembly, which includes a machine tool body and a movable mounting bracket, the movable mounting bracket is slidably mounted on the top surface of the machine tool body, a rotary clamp is rotatably mounted on the end of the machine tool body, a welding assembly is slidably mounted on the top surface of the machine tool body, the welding assembly includes a welding gun body, a detection assembly is coaxially mounted on the end of the movable mounting bracket close to the rotary clamp, a fire extinguisher body is jointly mounted between the detection assembly and the rotary clamp, the detection assembly includes a positioning assembly, a plurality of clamping assemblies are circumferentially and equidistantly mounted on the outer wall of the positioning assembly, a rotating assembly is coaxially and fixedly mounted on the front end of the positioning assembly, a gas supplementing assembly is coaxially and fixedly mounted on the front end of the rotating assembly, and an air tightness assembly is coaxially and fixedly mounted on the front end of the gas supplementing assembly.

[0007] As a further scheme of the present application, the welding assembly comprises a sliding base, the sliding base is slidingly installed on the top surface of the machine tool body, a sliding rail is fixedly installed on the top surface of the sliding base, a sliding seat is slidingly installed on the outer wall of the sliding rail, an installation seat is fixedly installed on the top surface of the sliding seat, a support arm is rotationally installed on the top surface of the installation seat, and the welding gun body is fixedly connected with the end of the support arm away from the installation seat.

[0008] As a further scheme of the present application, the positioning assembly comprises a positioning cylinder, the positioning cylinder is rotationally connected to the rear end of the moving mounting frame, a corrugated ring sleeve is coaxially installed in the positioning cylinder, and a plurality of connecting pipes are circumferentially and equidistantly arranged on the outer wall of the corrugated ring sleeve.

[0009] As a further scheme of the present application, the clamping assembly comprises a sliding cylinder, the sliding cylinder is fixedly installed on the outer wall of the positioning cylinder, the connecting pipes pass through the side wall of the positioning cylinder and are in communication with the inside of the sliding cylinder, a piston rod is slidingly installed in the inside of the sliding cylinder, a connecting rod is slidingly connected to the end of the piston rod away from the sliding cylinder after passing through the sliding cylinder, and a plurality of installation arms are circumferentially and equidistantly arranged on the outer wall of the positioning cylinder.

[0010] As a further scheme of the present application, the connecting rods of the plurality of clamping assemblies are rotationally connected to the ends of the installation arms, respectively, a clamping claw is rotationally connected to the end of the connecting rod away from the piston rod, and a plurality of rubber strips are equidistantly installed on the inner arc surface of the clamping claw.

[0011] As a further scheme of the present application, the rotating assembly comprises a rifling tube, the rifling tube is coaxially and fixedly installed at the front end of the positioning cylinder, a rifling sleeve is rotationally connected to the outer wall of the rifling tube, two sliding blocks are symmetrically installed on the outer wall of the rifling sleeve, and the two sliding blocks are slidingly inserted into the inner wall of the moving mounting frame, respectively.

[0012] As a further scheme of the present application, the air supplementing assembly comprises an installation ring, the installation ring is coaxially and fixedly installed at the front end surface of the rifling sleeve, an air supplementing pipe is fixedly installed on the outer wall of the installation ring, a first ball valve is slidingly installed in the inside of the air supplementing pipe, and a first spring is fixedly connected to the outer wall of the first ball valve.

[0013] As a further scheme of the present application, the air-tight assembly comprises a corrugated sleeve, the corrugated sleeve is fixedly connected to the front end surface of the installation ring, the end of the corrugated sleeve away from the installation ring is fixedly installed in the inside of the moving mounting frame, an air inlet pipe is fixedly installed at the center of the front end surface of the corrugated sleeve, a second ball valve is slidingly installed in the inside of the air inlet pipe, and a second spring is fixedly installed on the outer wall of the second ball valve.

[0014] As a further scheme of the present application, a communication pipe is fixedly installed at the center of the rear end surface of the corrugated sleeve, a third ball valve is slidingly installed on the inner wall of the communication pipe, an elastic rope is fixedly connected to the outer wall of the third ball valve, and the end of the elastic rope away from the third ball valve is fixedly connected to the inner wall of the front end of the corrugated sleeve.

[0015] As a further embodiment of the present invention, an air guide tube is fixedly installed on the front end face of the corrugated sleeve, and a display tube is fixedly installed on the end of the air guide tube away from the corrugated sleeve after passing through the side wall of the movable mounting frame. A scale piston is slidably installed on the inner wall of the display tube, and a third spring is sandwiched between the top surface of the scale piston and the inner top surface of the display tube.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. During use, this invention achieves a continuous closed-loop operation process from automatic clamping of the fire extinguisher body and precision welding to post-weld airtightness testing through the coordinated linkage of positioning components, welding components and airtight components. This significantly improves the automation level and production cycle of the production line, reduces the frequency of manual intervention and improves the consistency and reliability of welding and testing.

[0018] 2. In the process of use, the invention compresses and drives the hydraulic oil through the corrugated ring sleeve and distributes it to several sliding cylinders through the connecting pipe. The piston rod drives the connecting rod and achieves adaptive uniform clamping with the help of the first torsion spring and the second torsion spring. The relative movement of the rifle tube and the rifle sleeve precisely drives the airtight component, while ensuring the clamping stability of the workpiece, the welding posture adjustment capability and the airtightness detection response.

[0019] 3. During use, the flexible positioning and multi-axis adjustment structure composed of the sliding base, sliding rail and support arm allows the welding torch body to move precisely along the weld and adjust the angle. The air jet pipe cools the weld quickly. The combination of the corrugated sleeve, display tube and scale piston of the airtight component can instantly determine whether there is porosity in the weld, thereby reducing rework rate, shortening the single-piece processing cycle and improving yield. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is an exploded view of the overall structure of the present invention;

[0022] Figure 3 This is an exploded view of the welding assembly structure of the present invention;

[0023] Figure 4 This is an exploded view of the fire extinguisher body structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the detection component structure of the present invention;

[0025] Figure 6 This is an exploded view of the detection component structure of the present invention;

[0026] Figure 7 This is an exploded view of the positioning component structure of the present invention;

[0027] Figure 8 This is an exploded view of the clamping component structure of the present invention;

[0028] Figure 9 This is an exploded view of the rotating component structure of the present invention;

[0029] Figure 10 This is an exploded view of the air replenishment component structure of the present invention;

[0030] Figure 11 This is an exploded view of the airtight component structure of the present invention;

[0031] Figure 12 This is a cross-sectional view of the detection component structure of the present invention;

[0032] Figure 13 for Figure 12 Enlarged view of the structure at point A in the image;

[0033] Figure 14 for Figure 12 Enlarged view of the structure at point B in the image;

[0034] Figure 15 for Figure 12 Enlarged view of the structure at point C.

[0035] In the picture:

[0036] 1. Machine tool components; 11. Machine tool body; 111. Rotary caliper; 112. Air jet pipe; 12. Movable mounting bracket;

[0037] 2. Welding assembly; 21. Sliding base; 211. Sliding rail; 22. Sliding seat; 23. Mounting base; 24. Support arm; 25. Welding torch body;

[0038] 3. Fire extinguisher body; 31. Rear end shell; 32. Front end shell;

[0039] 4. Detection components;

[0040] 5. Positioning assembly; 51. Positioning cylinder; 511. Rotating groove; 512. Mounting plate; 513. Mounting arm; 52. Corrugated ring sleeve; 521. Connecting pipe;

[0041] 6. Clamping assembly; 61. Sliding cylinder; 62. Piston rod; 621. Sliding insert rod; 63. Connecting rod; 631. Slide groove; 64. First torsion spring; 65. Clamping claw; 66. Second torsion spring;

[0042] 7. Rotating assembly; 71. Rifling tube; 711. Positioning ring; 72. Rifling sleeve; 721. Sliding insert;

[0043] 8. Air supply assembly; 81. Mounting ring; 811. Air supply pipe; 82. First ball valve; 83. First spring;

[0044] 9. Airtight component; 91. Corrugated sleeve; 911. Inlet pipe; 912. Connecting pipe; 913. Connecting bracket; 914. Air outlet; 92. Second ball valve; 93. Second spring; 94. Third ball valve; 95. Elastic rope; 96. Air guide pipe; 961. Display tube; 97. Scale piston; 98. Third spring. Detailed Implementation

[0045] 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.

[0046] Example 1: Please refer to Figures 1 to 6 A welding device for fire extinguishers includes a machine tool assembly 1, which includes a machine tool body 11 and a movable mounting frame 12. The movable mounting frame 12 is slidably mounted on the top surface of the machine tool body 11. A rotating clamp 111 is rotatably mounted on the end of the machine tool body 11. A welding assembly 2, including a welding torch body 25, is slidably mounted on the top surface of the machine tool body 11. Specifically, a sliding rail is fixedly mounted on the top surface of the machine tool body 11. The movable mounting frame 12 and the welding assembly 2 are slidably mounted together on the outer wall of the sliding rail. An air jet pipe 112 is fixedly mounted on the outer wall of the machine tool body 11. The air jet pipe 112 is used to rapidly cool the weld seam of the fire extinguisher body 3. The movable mounting frame 12 is close to the rotating clamp. A detection component 4 is coaxially mounted on the end of the clamp 111. The fire extinguisher body 3 is installed together with the detection component 4 and the rotating clamp 111. Specifically, the fire extinguisher body 3 includes a rear shell 31 and a front shell 32. The rear shell 31 and the front shell 32 are coaxially clamped together. The weld between the rear shell 31 and the front shell 32 is welded and fixed by the welding torch body 25 to form a sealed fire extinguisher body 3. The detection component 4 includes a positioning component 5. Several clamping components 6 are equidistantly installed on the outer circumference of the positioning component 5. A rotating component 7 is coaxially fixedly installed on the front end of the positioning component 5. An air supply component 8 is coaxially fixedly installed on the front end of the rotating component 7. An airtight component 9 is coaxially fixedly installed on the front end of the air supply component 8.

[0047] Please see Figures 2 to 3The welding assembly 2 includes a sliding base 21, which is slidably mounted on the top surface of the machine tool body 11. Specifically, the sliding base 21 is slidably mounted on the outer wall of the sliding rail. A sliding rail 211 is fixedly mounted on the top surface of the sliding base 21, and a sliding seat 22 is slidably mounted on the outer wall of the sliding rail 211. Specifically, the sliding rail 211 has an inverted trapezoidal cross-section, and the bottom surface of the sliding seat 22 has a sliding groove that matches the shape of the sliding rail 211. The sliding rail 211 has a limiting and guiding function for the sliding seat 22, preventing the sliding seat 22 from slipping off the outer wall of the sliding rail 211. A sliding groove is fixedly mounted on the top surface of the sliding seat 22. Mounting base 23, with support arm 24 rotatably mounted on its top surface. Welding torch body 25 is fixedly connected to the end of support arm 24 away from mounting base 23. Specifically, the top surface of sliding seat 22 is fixedly connected to mounting base 23 by bolts. A rotating groove is provided on the top surface of mounting base 23. A rotating disk is coaxially fixedly welded to the bottom end of support arm 24. The rotating disk is rotatably connected to the inner wall of the rotating groove. The rotating groove has a limiting effect on the rotating disk, preventing support arm 24 from slipping out of the rotating groove. Welding torch body 25 is fixedly connected to the end of support arm 24 by bolts, allowing welding torch body 25 to be flexibly adjusted in multiple directions.

[0048] Example 2: Please refer to Figures 2 to 8 , Figure 12 , Figure 13 A welding device for fire extinguishers, differing from Embodiment 1 in that the positioning component 5 includes a positioning cylinder 51, which is rotatably connected to the rear end of a movable mounting frame 12. Specifically, a rotating ring is rotatably mounted on the rear end of the movable mounting frame 12. A rotating groove 511 is provided at the front end of the outer wall of the positioning cylinder 51, and the rotating ring is rotatably engaged inside the rotating groove 511. The rotating ring has a limiting and guiding function on the rotating groove 511 to prevent the positioning cylinder 51 from slipping inside the rotating frame. A corrugated ring sleeve 52 is coaxially mounted inside the positioning cylinder 51. Several connecting pipes 521 are equidistantly arranged on the circumference of the outer wall of the corrugated ring sleeve 52. Specifically, the material of the corrugated ring sleeve 52 is nitrile rubber, which has good wear resistance and ductility. The corrugated ring sleeve 52 is filled with hydraulic oil. An mounting plate 512 is welded and fixed inside the positioning cylinder 51. The front end face of the corrugated ring sleeve 52 is coaxially fixed to the rear end face of the mounting plate 512 by bolts.

[0049] Please see Figure 2 , Figures 5 to 8 , Figure 12 , Figure 13The clamping assembly 6 includes a sliding cylinder 61, which is fixedly installed on the outer wall of the positioning cylinder 51. A connecting pipe 521 passes through the side wall of the positioning cylinder 51 and communicates with the interior of the sliding cylinder 61. Specifically, mounting holes are equidistantly opened on the outer circumference of the positioning cylinder 51, and the connecting pipe 521 passes through the mounting holes and communicates with the interior of the sliding cylinder 61. A piston rod 62 is slidably installed inside the sliding cylinder 61. The end of the piston rod 62 away from the sliding cylinder 61 passes through the sliding cylinder 61 and is slidably connected to a connecting rod 63. Several mounting arms 513 are equidistantly arranged on the outer circumference of the positioning cylinder 51, and several sets of clamps... In the holding assembly 6, the connecting rods 63 are rotatably connected to the ends of the mounting arms 513. Specifically, the end of the sliding rod 621 away from the sliding cylinder 61 is welded and fixed with a sliding rod 621. A through groove 631 is opened on the outer wall of the end of the connecting rod 63 near the piston rod 62. The sliding rod 621 is slidably inserted into the groove 631. A rotating shaft is provided in the middle of the connecting rod 63. The rotating shaft is rotatably connected to the end of the mounting arm 513. A first torsion spring 64 is sleeved on the outer wall of the rotating shaft. The two ends of the first torsion spring 64 are fixedly connected to the rotating shaft and the outer wall of the mounting arm 513, respectively. A torsion spring 64 has a resetting function for the connecting rod 63. A clamping pawl 65 is rotatably connected to the end of the connecting rod 63 away from the piston rod 62. Several rubber strips are equidistantly installed on the inner arc surface of the clamping pawl 65. Specifically, a rotating shaft is welded and fixed to the outer arc surface of the clamping pawl 65. A second torsion spring 66 is sleeved on the outer wall of the rotating shaft. The two ends of the second torsion spring 66 are fixedly connected to the rotating shaft of the clamping pawl 65 and the outer wall of the connecting rod 63, respectively. The second torsion spring 66 has a resetting function for the clamping pawl 65, preventing it from flipping and causing clamping failure. The front end of the front housing 32 is inserted into the positioning cylinder 51. Inside, the corrugated sleeve 52 is compressed, and the hydraulic oil inside the corrugated sleeve 52 enters the sliding cylinder 61 of several sets of clamping assemblies 6 through several connecting pipes 521. The piston rod 62 inside the sliding cylinder 61 is hydraulically pushed, and the piston rod 62 drives the connecting rod 63 to rotate at the end of the mounting arm 513. The first torsion spring 64 is compressed, so that the clamping claws 65 in several sets of clamping assemblies 6 fix and clamp the outer wall of the front end shell 32. During the clamping process, the clamping claws 65 adjust the angle at the end of the connecting rod 63, and the second torsion spring 66 is compressed.

[0050] Example 3: Please refer to Figures 2 to 15A welding device for fire extinguishers, differing from Embodiment 1 in that the rotating assembly 7 includes a rifle tube 71, which is coaxially fixedly installed at the front end of the positioning cylinder 51. Specifically, the rifle tube 71 extends through the front and rear, and a positioning ring 711 is coaxially fixedly installed at the rear end of the rifle tube 71. The positioning ring 711 is coaxially fixedly installed on the front end face of the mounting plate 512 by bolts. A rifle sleeve 72 is rotatably connected to the outer wall of the rifle tube 71. Two sliding inserts 721 are symmetrically installed on the left and right sides of the outer wall of the rifle sleeve 72. The two sliding inserts 721 are slidably inserted into the inner wall of the movable mounting frame 12. Specifically, a number of guide strips are equidistantly provided on the circumference of the outer wall of the rifle tube 71, and the inner wall of the rifle sleeve 72 is circumferentially... Several guide grooves are equidistantly provided, and several guide strips slide in cooperation with several guide grooves respectively. Two sliding grooves are symmetrically provided on the inner wall of the movable mounting frame 12. Two sliding blocks 721 are slidably inserted into the inner wall of the two sliding grooves respectively. When the rotating caliper 111 of the machine tool body 11 drives the fire extinguisher body 3 to rotate, the front shell 32 of the fire extinguisher body 3 drives the positioning cylinder 51 and the fire tube 71 to rotate synchronously. The fire tube 71 rotates inside the fire sleeve 72. Since the two sliding blocks 721 of the fire sleeve 72 are slidably inserted into the inner wall of the two sliding grooves, the fire sleeve 72 cannot rotate. The fire tube 71 drives the fire sleeve 72 to move back and forth inside the movable mounting frame 12.

[0051] Please see Figures 7 to 15 The air supply assembly 8 includes a mounting ring 81, which is coaxially fixed to the front end face of the rifle sleeve 72. Specifically, the mounting ring 81 is coaxially fixed to the front end face of the rifle sleeve 72 by bolts. An air supply pipe 811 is fixedly installed on the outer wall of the mounting ring 81. A first ball valve 82 is slidably installed inside the air supply pipe 811. A first spring 83 is fixedly connected to the outer wall of the first ball valve 82. For details, please refer to [link / reference]. Figure 12 , Figure 14 An abutment ring is fixedly installed on the inner wall of the air supply pipe 811 near the top end, and a fixing ring is fixedly installed on the inner wall of the air supply pipe 811 near the bottom end. The outer wall of the first ball valve 82 is tightly abutted against the abutment ring, and the end of the first spring 83 away from the first ball valve 82 is fixedly installed on the top surface of the fixing ring.

[0052] Please see Figures 7 to 15 The airtight component 9 includes a corrugated sleeve 91, which is fixedly connected to the front end face of the mounting ring 81. The end of the corrugated sleeve 91 away from the mounting ring 81 is fixedly installed inside the movable mounting bracket 12. Specifically, a support frame is welded and fixed inside the movable mounting bracket 12, and the corrugated sleeve 91 is fixedly connected to the support frame by bolts. The corrugated sleeve 91 is made of nitrile rubber, which has good corrosion resistance and ductility. An air inlet pipe 911 is fixedly installed at the center of the front end face of the corrugated sleeve 91. A second ball valve 92 is slidably installed inside the air inlet pipe 911, and a second spring 93 is fixedly installed on the outer wall of the second ball valve 92. For details, please refer to [link / reference]. Figure 12, Figure 15 An abutment ring is fixedly installed on the inner wall of the intake pipe 911 near the front end, and a retaining ring is fixedly installed on the inner wall of the intake pipe 911 near the rear end. The outer wall of the second ball valve 92 is tightly abutted against the abutment ring. The end of the second spring 93 away from the first ball valve 82 is fixedly installed on the top surface of the retaining ring. A connecting pipe 912 is fixedly installed at the center of the rear end face of the corrugated sleeve 91. A third ball valve 94 is slidably installed on the inner wall of the connecting pipe 912. An elastic rope 95 is fixedly connected to the outer wall of the third ball valve 94. The end of the elastic rope 95 away from the third ball valve 94 is fixedly connected to the inner wall of the front end of the corrugated sleeve 91. For details, please refer to [link to relevant documentation]. Figure 11 , Figure 12 , Figure 15A contact ring is fixedly installed on the inner wall of the connecting pipe 912 near the front end. The outer wall of the third ball valve 94 is in close contact with the contact ring. The elastic rope 95 is made of natural rubber, which has good elasticity. When the corrugated sleeve 91 is unfolded, the elastic rope 95 is stretched and taut, making the third ball valve 94 in close contact with the contact ring inside the connecting pipe 912. When the corrugated sleeve 91 is compressed to one-third of its length, the elastic rope 95 is relaxed, and the contact between the third ball valve 94 and the contact ring inside the connecting pipe 912 is released. A connecting bracket 913 is fixedly installed at the center of the inner wall at the front end of the corrugated sleeve 91. The end of the bellows sleeve 91 away from the third ball valve 94 is fixedly connected to the connecting bracket 913. A vent pipe 96 is fixedly installed on the front end face of the bellows sleeve 91. The end of the vent pipe 96 away from the bellows sleeve 91 passes through the side wall of the movable mounting bracket 12 and is then fixedly installed with a display tube 961. A scale piston 97 is slidably installed on the inner wall of the display tube 961. A third spring 98 is sandwiched between the top surface of the scale piston 97 and the inner top surface of the display tube 961. Specifically, an air outlet 914 is fixedly installed on the front end face of the bellows sleeve 91. The vent pipe 96 is fixedly installed on the front end face of the bellows sleeve 91 by bolts. The positions of the vent pipe 96 and the air outlet 914 correspond. The display tube... The 961 display tube is made of transparent glass, and its outer wall is marked with red pigment markings. When the rotating caliper 111 of the machine tool body 11 drives the fire extinguisher body 3 to rotate, the operator operates the welding torch body 25 in the welding assembly 2 to weld the weld seam in the middle of the fire extinguisher body 3. At the same time, the front shell 32 of the fire extinguisher body 3 drives the positioning cylinder 51 and the fuse tube 71 to rotate synchronously. The fuse tube 71 rotates inside the fuse sleeve 72. Because the two sliding blocks 721 of the fuse sleeve 72 are slidably inserted into the inner walls of the two sliding grooves, the fuse sleeve 72 cannot rotate. The fuse tube 71 drives the fuse sleeve in this way. 72 moves forward inside the movable mounting bracket 12, and the rifle sleeve 72 drives the mounting ring 81 to move forward, compressing the corrugated sleeve 91. Since the detection component 4 and the fire extinguisher body 3 form a sealed space at this time, the sealed space becomes larger and the internal air pressure decreases. The first ball valve 82 inside the air supply pipe 811 is sucked by the negative pressure, causing the first ball valve 82 to disengage from the contact ring. The first spring 83 is compressed, and external gas enters the sealed space. The gas inside the corrugated sleeve 91 is discharged into the air guide pipe 96 through the air outlet 914. The high-pressure gas pushes the scale piston 97 inside the display tube 961 to move upward, compressing the third spring 98.

[0053] When the rotating caliper 111 of the machine tool body 11 drives the fire extinguisher body 3 to rotate one revolution, the welding work of the welding torch body 25 on the weld seam in the middle of the fire extinguisher body 3 is completed. At this time, the corrugated sleeve 91 is compressed to one-third of its length, the elastic rope 95 is in a relaxed state, the third ball valve 94 and the abutment ring inside the connecting pipe 912 are released from contact, the compressed gas inside the corrugated sleeve 91 enters the sealed space and balances with the air pressure in the sealed space, the third spring 98 releases its elastic force, and the scale piston 97 descends a portion to... The completed fire extinguisher body 3 undergoes an inflation test. The operator observes the position of the graduated piston 97 through the display tube 961. If the graduated piston 97 continues to descend to its initial position, the weld of the fire extinguisher body 3 has pores and needs to be re-welded. If the graduated piston 97 remains stable, the weld of the fire extinguisher body 3 has no pores and can proceed to the next process. The rotating clamp 111 of the machine tool body 11 is activated, causing the fire extinguisher body 3 to reverse. The front shell 32 of the fire extinguisher body 3 then moves the positioning cylinder 51 and... The rifling tube 71 rotates synchronously, and the rifling tube 71 rotates inside the rifling sleeve 72. The rifling tube 71 drives the rifling sleeve 72 to move backward inside the movable mounting bracket 12. The rifling sleeve 72 drives the mounting ring 81 to move backward, stretching the corrugated sleeve 91. The air pressure inside the corrugated sleeve 91 decreases, the third spring 98 releases its elastic force, the graduated piston 97 returns to its initial position, and the second ball valve 92 is attracted by negative pressure, causing the second ball valve 92 to disengage from the abutment ring inside the air intake pipe 911. The second spring 93 is compressed. External gas enters the corrugated sleeve 91 through the air inlet pipe 911, facilitating the next inspection. The movable mounting bracket 12 moves the positioning component 5 forward, releasing the clamp on the fire extinguisher body 3. The first torsion spring 64 releases its elastic force, causing the connecting rod 63 to return to its initial position. The clamping claw 65 releases its clamp on the fire extinguisher body 3. The end of the connecting rod 63 drives the piston rod 62 to move downward inside the sliding cylinder 61, pressing the hydraulic oil inside the sliding cylinder 61 back into the corrugated sleeve 52, facilitating the next operation.

[0054] The working principle of this invention is as follows: When this device is in use, the rear end shell 31 and the front end shell 32 of the fire extinguisher body 3 are first coaxially clamped and fixed between the rotating caliper 111 and the detection component 4 of the machine tool body 11. When the front end shell 32 of the fire extinguisher body 3 is inserted into the positioning cylinder 51, the corrugated ring sleeve 52 is squeezed and deformed. The hydraulic oil inside the corrugated ring sleeve 52 flows into each sliding cylinder 61 through the connecting pipe 521. The hydraulic oil pushes the piston rod 62 to move. The piston rod 62 drives the connecting rod 63 to rotate around the rotating shaft at the end of the mounting arm 513. The first torsion spring 64 is compressed. The clamping claw 65 at the end of the connecting rod 63 clamps the outer wall of the front end shell 32 evenly. The second torsion spring 66 on the outer arc surface of the clamping claw 65 provides a restoring force to prevent the clamping claw 65 from flipping during the clamping process, thereby achieving stable fixation of the fire extinguisher body 3.

[0055] The operator starts the machine tool assembly 1. The rotating caliper 111 of the machine tool body 11 drives the fire extinguisher body 3 to rotate, so that the front shell 32 synchronously drives the positioning cylinder 51 in the positioning assembly 5 and the rifling tube 71 in the rotating assembly 7 to rotate together. The operator operates the welding torch body 25 in the welding assembly 2 to weld the weld seam in the middle of the fire extinguisher body 3. The welding assembly 2 moves smoothly on the top surface of the machine tool body 11 through the sliding base 21, the sliding rail 211 and the sliding seat 22. The welding torch body 25 rotates in the rotating groove with the help of the support arm 24, which can flexibly adjust the welding angle to ensure the welding position is accurate. After the welding is completed, the jet pipe 112 sprays cooling airflow to quickly cool the weld seam area.

[0056] During the welding process, the front shell 32 of the fire extinguisher body 3 continues to drive the positioning cylinder 51 to rotate synchronously, and the fire tube 71 rotates inside the fire sleeve 72. Since the two sliding blocks 721 of the fire sleeve 72 are slidably inserted into the sliding groove on the inner wall of the movable mounting bracket 12, the fire sleeve 72 cannot rotate. Driven by the fire tube 71, the fire sleeve 72 moves back and forth along the direction of the sliding groove.

[0057] When the rifle sleeve 72 moves forward, the mounting ring 81 installed at the front end of the rifle sleeve 72 simultaneously pushes the air replenishment component 8 and the airtight component 9 forward, causing the corrugated sleeve 91 to be compressed axially. At the same time, the detection component 4 and the interior of the fire extinguisher body 3 form a sealed space. The increase in the volume of the sealed space causes the internal air pressure to decrease. Under the action of negative pressure, the first ball valve 82 in the air replenishment pipe 811 is drawn away from the abutment ring position, the first spring 83 is compressed, and the external gas enters the sealed space through the air replenishment pipe 811 to realize automatic air replenishment.

[0058] As the bellows sleeve 91 is compressed, the gas pressure inside the bellows sleeve 91 gradually increases. The gas inside the gas guide pipe 96 pushes the scale piston 97 inside the display tube 961 upward, compressing the third spring 98. When the rotating caliper 111 of the machine tool body 11 drives the fire extinguisher body 3 to rotate one revolution, the weld of the fire extinguisher body 3 is completed. At this time, the rifle tube 71 continues to drive the rifle sleeve 72 forward, causing the bellows sleeve 91 to be compressed to one-third of its length. The elastic rope 95 inside the bellows sleeve 91 is in a relaxed state, and the third ball valve 94 and the connecting... When the contact ring inside the through pipe 912 disengages, the compressed gas inside the corrugated sleeve 91 enters the sealed space and balances with the air pressure inside the sealed space. Due to the pressure balance, at this time, the reading position of the scale piston 97 on the scale line on the outer wall of the display tube 961 can be used to judge the airtightness of the weld of the fire extinguisher body 3. If the scale piston 97 slowly descends to the initial position, it indicates that there are air holes in the weld of the fire extinguisher body 3 and it needs to be re-welded. If the scale piston 97 remains stable, it indicates that the airtightness of the weld of the fire extinguisher body 3 is good and it can proceed to the next process.

[0059] After the airtightness test of the fire extinguisher body 3 is completed, the control machine tool body 11 rotates the caliper 111 in reverse, causing the fire extinguisher body 3 and the positioning cylinder 51 to rotate in the opposite direction. The rifling tube 71 drives the rifling sleeve 72 to move backward inside the movable mounting bracket 12. The mounting ring 81 drives the corrugated sleeve 91 to reset. During the stretching process, the internal air pressure of the corrugated sleeve 91 decreases. The second ball valve 92 is drawn in under the negative pressure, and the second spring 93 is compressed. External gas enters the interior of the corrugated sleeve 91 through the air inlet pipe 911 to achieve gas compensation and prepare for the next test.

[0060] When the movable mounting bracket 12 moves the positioning assembly 5 forward, the first torsion spring 64 releases its elastic force, the connecting rod 63 returns to its initial angle, the clamping claw 65 releases its grip on the fire extinguisher body 3, the piston rod 62 moves downward inside the sliding cylinder 61, and the hydraulic oil is pushed back into the corrugated ring sleeve 52. The entire clamping assembly 6 is reset, making it convenient for the next welding cycle. At this point, the operation of this device is completed.

[0061] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A welding device for fire extinguishers, comprising a machine tool assembly (1), characterized in that: The machine tool assembly (1) includes a machine tool body (11) and a mobile mounting frame (12), the mobile mounting frame (12) is slidingly installed on the top surface of the machine tool body (11), the end of the machine tool body (11) is rotatably installed with a rotating caliper (111), and the top surface of the machine tool body (11) is slidingly installed with a welding assembly (2); the end of the mobile mounting frame (12) close to the rotating caliper (111) is coaxially installed with a detection assembly (4), and the detection assembly (4) and the rotating caliper (111) are jointly installed with a fire extinguisher body (3); the detection assembly (4) includes a positioning assembly (5), a plurality of clamping assemblies (6) are circumferentially and equidistantly installed on the outer wall of the positioning assembly (5), the front end of the positioning assembly (5) is coaxially and fixedly installed with a rotating assembly (7), the front end of the rotating assembly (7) is coaxially and fixedly installed with a gas supplementing assembly (8), and the front end of the gas supplementing assembly (8) is coaxially and fixedly installed with a gas-tight assembly (9).

2. A welding device for fire extinguishers as claimed in claim 1, wherein: The welding assembly (2) includes a sliding base (21), the sliding base (21) is slidingly installed on the top surface of the machine tool body (11), the top surface of the sliding base (21) is fixedly installed with a sliding rail (211), the outer wall of the sliding rail (211) is slidingly installed with a sliding seat (22), the top surface of the sliding seat (22) is fixedly installed with a mounting seat (23), the top surface of the mounting seat (23) is rotatably installed with a support arm (24), and the welding gun body (25) is fixedly connected with the end of the support arm (24) away from the mounting seat (23).

3. A welding device for fire extinguishers as claimed in claim 1, wherein: The positioning assembly (5) includes a positioning cylinder (51), the positioning cylinder (51) is rotatably connected to the rear end of the mobile mounting frame (12), and the positioning cylinder (51) is coaxially installed with a corrugated ring sleeve (52) inside.

4. A welding device for fire extinguishers as defined in claim 1, characterized in that: The clamping assembly (6) includes a sliding cylinder (61), the sliding cylinder (61) is fixedly installed on the outer wall of the positioning cylinder (51), the connecting pipe (521) penetrates through the side wall of the positioning cylinder (51) and is in communication with the inside of the sliding cylinder (61), the inside of the sliding cylinder (61) is slidingly installed with a piston rod (62), the end of the piston rod (62) away from the sliding cylinder (61) is slidingly connected with a connecting rod (63) after penetrating through the sliding cylinder (61), and the outer wall of the positioning cylinder (51) is circumferentially and equidistantly provided with a plurality of mounting arms (513).

5. A welding device for fire extinguishers as defined in claim 4, characterized in that: The connecting rods (63) of a plurality of groups of the clamping assemblies (6) are rotatably connected to the ends of the mounting arms (513), respectively, the end of the connecting rod (63) away from the piston rod (62) is rotatably connected with a clamping jaw (65), and a plurality of rubber strips are equidistantly installed on the inner arc surface of the clamping jaw (65).

6. A welding device for fire extinguishers as defined in claim 1, characterized in that: The rotating assembly (7) includes a LeFou pipe (71), the LeFou pipe (71) is coaxially and fixedly installed at the front end of the positioning cylinder (51), the outer wall of the LeFou pipe (71) is rotatably connected with a LeFou sleeve (72), the outer wall of the LeFou sleeve (72) is symmetrically installed with two sliding blocks (721) on the left and right, and the two sliding blocks (721) are slidingly inserted into the inner wall of the mobile mounting frame (12), respectively.

7. A welding device for fire extinguishers as defined in claim 1, characterized in that: The air supplement assembly (8) comprises a mounting ring (81), the mounting ring (81) is coaxially fixedly installed at the front end surface of the laffol sleeve (72), the outer wall of the mounting ring (81) is fixedly installed with an air supplement pipe (811), the first ball valve (82) is slidably installed in the air supplement pipe (811), and the outer wall of the first ball valve (82) is fixedly connected with the first spring (83).

8. A welding device for fire extinguishers as defined in claim 1, characterized in that: The air-tight assembly (9) comprises a corrugated sleeve (91), the corrugated sleeve (91) is fixedly connected with the front end surface of the mounting ring (81), the end, away from the mounting ring (81), of the corrugated sleeve (91) is fixedly installed in the mobile mounting frame (12), the front end surface of the corrugated sleeve (91) is fixedly installed with an air inlet pipe (911) at the center, the second ball valve (92) is slidably installed in the air inlet pipe (911), and the outer wall of the second ball valve (92) is fixedly installed with the second spring (93).

9. A welding device for fire extinguishers as defined in claim 8, characterized in that: The corrugated sleeve (91) is fixedly installed with a communication pipe (912) at the center of the rear end surface, the third ball valve (94) is slidably installed in the inner wall of the communication pipe (912), the outer wall of the third ball valve (94) is fixedly connected with the elastic rope (95), and the end, away from the third ball valve (94), of the elastic rope (95) is fixedly connected with the front end inner wall of the corrugated sleeve (91).

10. A welding device for fire extinguishers as defined in claim 9, characterized in that: The corrugated sleeve (91) is fixedly installed with a gas guide pipe (96) at the front end surface, the end, away from the corrugated sleeve (91), of the gas guide pipe (96) is fixedly installed with a display pipe (961) after penetrating through the side wall of the mobile mounting frame (12), and the scale piston (97) is slidably installed in the inner wall of the display pipe (961); the third spring (98) is clamped between the top surface of the scale piston (97) and the inner top surface of the display pipe (961).

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