Spot welding inflation structure with rotatable nozzle

Abstract

The invention relates to the technical field of argon arc welding, and discloses a nozzle rotatable type spot welding inflation structure which comprises a metal outer pipe, the upper half section of the metal outer pipe is bent by 90 degrees, the metal outer pipe is communicated with an air inlet pipe, the top end of the metal outer pipe is rotationally connected with a spray head through a bearing, and a bendable connecting spring serves as a torsion transmission structure. The handle assembly is rotated to drive the lower connecting table to rotate so as to drive the lower connecting end to rotate, torsion generated when the lower connecting end rotates can be transmitted to the connecting spring, so that the connecting spring rotates, the connecting spring rotates to drive the upper connecting end to rotate so as to drive the upper connecting table to rotate, and the upper connecting table rotates to drive the spray head to rotate. The direction of the nozzle is changed to be aligned with a welding part, so that a protected welding spot can be better protected and quickly cooled, the welding spot is silvery white, the problem of repeated replacement between a straight tube type gas filling tube and a bent tube type gas filling tube can be avoided, and the processing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of argon arc welding, in particular to a nozzle rotatable type spot welding gas filling structure. BACKGROUND

[0002] When copper-nickel, stainless steel pipe and shaped bend butt joint spot welding is carried out by argon arc welding, due to the characteristics of copper-nickel and stainless steel, the pipe inner welding point position needs to be protected by argon. The gas outlet of the previous non-rotating straight pipe type and bend pipe type gas filling structure is fixed in a certain direction. When the spot welding of DN80 or below small pipe diameter stainless steel and copper-nickel bend pipe is carried out, the straight pipe type and bend pipe type gas filling pipe need to be replaced back and forth, which is troublesome and time-consuming, and is not conducive to the improvement of production efficiency. Especially when the non-rotating straight pipe type and bend pipe type gas protection is used at some positions, the gas outlet cannot well adhere to the pipe wall, and the welding point protection effect is not good. Based on the above reasons, the gas filling structure is improved. SUMMARY

[0003] The purpose of the present application is to provide a nozzle rotatable type spot welding gas filling structure to solve the problems raised in the background art.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a nozzle rotatable type spot welding gas filling structure, comprising a metal outer pipe, the upper half of the metal outer pipe is bent at 90°, a gas inlet pipe is communicated on the metal outer pipe, a spray head is rotatably connected to the top end of the metal outer pipe through a bearing, a nozzle is formed on the spray head, a connecting spring is arranged in the metal outer pipe, an upper connecting end is fixedly installed at the top end of the connecting spring, and a lower connecting end is fixedly installed at the bottom end of the connecting spring, a lower connecting table is fixedly installed at the bottom of the lower connecting end, the lower connecting table is rotatable with the metal outer pipe through a sealing bearing, a handle assembly is fixedly installed at the bottom end of the lower connecting table, an upper connecting table is fixedly installed on the outer wall of the lower connecting end, and the end of the upper connecting table is fixedly connected with the spray head.

[0005] Further, the handle assembly comprises a connecting rod, the top end of the connecting rod is fixedly connected with the bottom end of the lower connecting table, the connecting rod extends out of the metal outer pipe, and a knob piece is fixedly installed at the bottom end of the connecting rod.

[0006] Further, a grip is fixedly installed at the bottom of the metal outer pipe, the grip is rotatably sleeved on the connecting rod, and anti-skid lines are formed on the grip.

[0007] Further, two-piece stainless steel ball valves are communicated at the end of the gas inlet pipe away from the metal outer pipe, and ball valve external thread heads are communicated at the end of the two-piece stainless steel ball valves away from the gas inlet pipe.

[0008] Further, the metal outer pipe is welded by a front outer shell and a rear outer shell, and the gas inlet pipe is integrally formed with the metal outer pipe.

[0009] Further, the outer wall of the connecting spring is movably sleeved with a metal inner tube, the bending degree of the metal inner tube is consistent with the metal outer tube, the top end and the bottom end of the metal inner tube are fixedly installed with mounting seats, the upper connecting end and the lower connecting end are rotatably connected with the mounting seats through bearings, and the outer wall of the mounting seat is detachably provided with a fixing assembly, and the fixing assembly is fixedly connected with the inner wall of the metal outer tube.

[0010] Further, the fixing assembly comprises fixing rings and connecting pieces, the fixing rings are threadedly sleeved on the outer wall of the mounting seat, the connecting pieces are fixedly installed on the fixing rings, and three connecting pieces are arranged on one fixing ring, and the connecting pieces are fixedly connected with the inner wall of the metal outer tube at the end away from the fixing ring.

[0011] Further, the metal inner tube is formed by welding a front inner layer tube and a rear inner layer tube, and the mounting seat is integrally formed with the metal inner tube.

[0012] Further, the outer wall of the metal inner tube is slidably sleeved with a porous support, the porous support is made of foamed ceramic, and the porous support is staggered with the mounting seat on the metal inner tube.

[0013] Further, the porous support is divided into two parts, the upper half of the porous support is sleeved on the bending section of the metal inner tube, and the lower half of the porous support is sleeved on the vertical section of the metal inner tube.

[0014] Compared with the prior art, the beneficial effects of the present application are: The bendable connecting spring is used as a torsion transmission structure, the lower connecting table is rotated by rotating the handle assembly, and then the lower connecting end is rotated, the torsion of the lower connecting end is transmitted to the connecting spring, the connecting spring is rotated, the upper connecting end is rotated by the rotation of the connecting spring, and then the upper connecting table is rotated, the nozzle is rotated by the rotation of the upper connecting table, the orientation of the nozzle is changed, the metal outer tube of the upper half section is inserted into the to-be-welded elbow pipe, and the nozzle on the metal outer tube is aligned with the welding position, so that the nozzle can be aligned with the welding position at all times when air is sprayed to the welding position, the welding points can be better protected and rapidly cooled, the welding points are all silver-white, and the design can also avoid the problem of back and forth replacement between the straight pipe type and the elbow pipe type air charging pipe, and the processing efficiency is improved. When operating, the worker can hold the handle with one hand, and hold the metal outer tube as the outer main body, and hold the knob piece with the other hand, so that the nozzle only rotates with a small amplitude during the air charging process, and does not have a relatively obvious misalignment problem with the welding position. The metal outer pipe is welded by the front outer shell and the rear outer shell, and the gas inlet pipe is integrally formed with the metal outer pipe, and compared with the metal pipe which is integrally stretched, the structure such as the connecting spring, the upper connecting table and the lower connecting table can be better connected and installed in the metal outer pipe, and when the structure is installed, only the connecting spring, the upper connecting table and the lower connecting table need to be installed, and then the front outer shell and the rear outer shell are welded together; The metal inner pipe is arranged to guide and limit the connecting spring, so as to limit the bending angle and the bending degree of the connecting spring, and because the upper connecting end and the lower connecting end on the connecting spring are rotatably connected with the mounting seat on the metal inner pipe through the bearing, the connecting spring cannot be separated from the metal inner pipe, the fixing assembly is arranged to fixedly connect the mounting seat and the metal outer pipe, so as to fixedly connect the metal inner pipe and the metal outer pipe; The porous support is arranged to support the gap between the metal outer pipe and the metal inner pipe, increase the compression resistance and the deformation resistance of the entire inflatable structure, and the porous support made of the foamed ceramic can allow the argon to pass normally, and the foamed ceramic itself has low density and good heat insulation performance, and does not obviously increase the weight of the entire inflatable structure. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the present application; Figure 2 It is a structural schematic view of the present application Figure 1 It is a structural schematic view of the present application; Figure 3 It is a structural schematic view of the present application Figure 2 It is a structural schematic view of the present application; Figure 4 It is a structural schematic view of the present application Figure 5 It is a structural schematic view of the present application Figure 6 It is a structural schematic view of the present application Figure 7 It is a structural schematic view of the present application Figure 8 It is a structural schematic view of the present application Figure 9 It is a structural schematic view of the present application Figure 10 It is a structural schematic view of the present application

[0016] In the figure: 1, metal outer tube; 101, front outer shell; 102, rear outer shell; 2, metal inner tube; 201, front inner layer tube; 202, rear inner layer tube; 3, connecting spring; 301, upper connecting end; 302, lower connecting end; 4, upper connecting table; 5, lower connecting table; 6, handle assembly; 601, connecting rod; 602, knob piece; 7, grip; 8, sealing bearing; 9, air inlet pipe; 10, spray head; 1001, nozzle; 11, mounting seat; 12, fixing assembly; 1201, fixing ring; 1202, connecting piece; 13, porous support; 14, two-piece stainless steel ball valve; 15, ball valve external thread. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0018] Embodiment one Please refer to Figures 1-10 The present application provides a technical solution: a nozzle rotatable spot welding air charging structure, comprising a metal outer tube 1, the upper half of the metal outer tube 1 is bent at 90°, the metal outer tube 1 is connected with an air inlet pipe 9, the top end of the metal outer tube 1 is rotatably connected with a spray head 10 through a bearing, the spray head 10 is provided with a nozzle 1001, the metal outer tube 1 is provided with a connecting spring 3, the top end of the connecting spring 3 is fixedly installed with an upper connecting end 301, and the bottom end of the connecting spring 3 is fixedly installed with a lower connecting end 302, the bottom of the lower connecting end 302 is fixedly installed with a lower connecting table 5, the lower connecting table 5 is rotatable with the metal outer tube 1 through a sealing bearing 8, the bottom end of the lower connecting table 5 is fixedly installed with a handle assembly 6, the outer wall of the lower connecting end 302 is fixedly installed with an upper connecting table 4, the end of the upper connecting table 4 is fixedly connected with the spray head 10, the bendable connecting spring 3 is used as a torsion transmission structure, the lower connecting table 5 is rotated by rotating the handle assembly 6, and then the lower connecting end 302 is rotated, the torsion of the lower connecting end 302 when rotating is transmitted to the connecting spring 3, so that the connecting spring 3 is rotated, the connecting spring 3 drives the upper connecting end 301 to rotate, and then the upper connecting table 4 is rotated, the upper connecting table 4 drives the spray head 10 to rotate, and the orientation of the nozzle 1001 is changed, the upper half of the bent metal outer tube 1 is inserted into the pipe to be welded, and the spray head 10 on the metal outer tube 1 is aligned with the welding position, only when the air is sprayed to the welding position, the spray head 10 does not collide with the inner wall of the pipe, so that the nozzle 1001 is always aligned with the welding position, the protected welding point is better protected and quickly cooled, the welding point is silver white, and this design can also avoid the problem of back and forth replacement between the straight pipe type and the bent pipe type air charging pipe, and the processing efficiency is improved; The handle assembly 6 comprises a connecting rod 601, the top end of which is fixedly connected with the bottom end of the lower connecting table 5, the connecting rod 601 extends out of the metal outer tube 1, the bottom end of the connecting rod 601 is fixedly installed with a knob piece 602, the lower connecting table 5 and the knob piece 602 are connected through the connecting rod 601, so that when the lower connecting table 5 needs to be rotated, the knob piece 602 can be twisted to rotate the connecting rod 601, and the connecting rod 601 rotates to drive the lower connecting table 5 to rotate; The bottom of the metal outer tube 1 is fixedly installed with a handle 7, and the handle 7 is rotatably sleeved on the connecting rod 601, the handle 7 is provided with anti-skid lines, when operating, the worker can hold the handle 7 with one hand, and hold the metal outer tube 1 as the outer main body with the other hand, and hold the knob piece 602 with the other hand, so that the spray head 10 only rotates in a small range during the inflation process (the connecting spring 3 can be elastically twisted under the influence of external vibration or hand shaking, and then the spray head 10 can rotate in a small range), and the welding position will not be obviously misaligned; The end of the gas inlet pipe 9 away from the metal outer tube 1 is communicated with a two-piece stainless steel ball valve 14, the end of the two-piece stainless steel ball valve 14 away from the gas inlet pipe 9 is communicated with a ball valve external thread 15, the two-piece stainless steel ball valve 14 and the ball valve external thread 15 are arranged to connect the argon pipeline with the gas inlet pipe 9, and the two-piece stainless steel ball valve 14 is opened and closed to control whether the argon is introduced; The metal outer tube 1 is welded by a front outer shell 101 and a rear outer shell 102, the gas inlet pipe 9 is integrally formed with the metal outer tube 1, and compared with the metal tube which is integrally stretched, the connecting spring 3, the upper connecting table 4, the lower connecting table 5 and other structures can be better installed in the metal outer tube 1, and during installation, the connecting spring 3, the upper connecting table 4, the lower connecting table 5 and other structures are first installed, and then the front outer shell 101 and the rear outer shell 102 are welded together.

[0019] Working principle: in use, according to the construction requirements, select the appropriate length of the front outer shell 101, rear outer shell 102, connecting spring 3, upper connecting table 4, lower connecting table 5, sealed bearing 8, nozzle 10 and other structures are installed in the front outer shell 101, then the connecting rod 601 in the handle assembly 6 and the lower connecting table 5 are fixedly connected together, then the rear outer shell 102 is combined with the front outer shell 101, then the front outer shell 101 and the rear outer shell 102 are welded together, after welding, the sealing of the welding place is detected, before installing the handle assembly 6, the handle 7 needs to be sleeved on the connecting rod 601, after welding the front outer shell 101 and the rear outer shell 102, the handle 7 is welded on the metal outer tube 1, the worker connects the argon pipeline with the ball valve external thread 15, then holds the handle 7 with one hand, and holds the knob piece 602 with the other hand, twists the knob piece 602 to rotate, and then drives the connecting rod 601 to rotate, the connecting rod 601 drives the lower connecting table 5 to rotate, and then drives the lower connecting end 302 to rotate, the torsion of the lower connecting end 302 when rotating is transmitted to the connecting spring 3, so that the connecting spring 3 rotates, the connecting spring 3 drives the upper connecting end 301 to rotate, and then drives the upper connecting table 4 to rotate, the upper connecting table 4 drives the nozzle 10 to rotate, changes the orientation of the nozzle 1001, so that after the metal outer tube 1 is inserted into the to-be-welded elbow pipe, the nozzle 1001 can be aligned with the welding position, the two-piece stainless steel ball valve 14 is opened to let the argon enter the inlet pipe 9 from the ball valve external thread 15, and then enter the metal outer tube 1, the argon in the metal outer tube 1 enters the nozzle 10 from the metal outer tube 1, and then sprays to the welding position from the nozzle 1001 on the nozzle 10, that is, the welding position can be protected and rapidly cooled.

[0020] Example two Please refer to Figures 1-10The application provides a technical scheme: a nozzle rotatable spot welding air charging structure, which comprises a metal outer pipe 1, the upper half of the metal outer pipe 1 is bent at 90 degrees, the metal outer pipe 1 is provided with an air inlet pipe 9 in communication, the top end of the metal outer pipe 1 is rotationally connected with a spray head 10 through a bearing, the spray head 10 is provided with a nozzle 1001, a connecting spring 3 is arranged in the metal outer pipe 1, the top end of the connecting spring 3 is fixedly provided with an upper connecting end 301, the bottom end of the connecting spring 3 is fixedly provided with a lower connecting end 302, the bottom of the lower connecting end 302 is fixedly provided with a lower connecting table 5, the lower connecting table 5 is rotationally connected with the metal outer pipe 1 through a sealing bearing 8, the bottom end of the lower connecting table 5 is fixedly provided with a handle assembly 6, the outer wall of the lower connecting end 302 is fixedly provided with an upper connecting table 4, the end of the upper connecting table 4 is fixedly connected with the spray head 10, the bending connecting spring 3 is used as a torsion transmission structure, the lower connecting table 5 is driven to rotate by rotating the handle assembly 6, and then the lower connecting end 302 is driven to rotate, the torsion of the lower connecting end 302 when rotating is transmitted to the connecting spring 3, the connecting spring 3 is rotated, the connecting spring 3 drives the upper connecting end 301 to rotate, and then the upper connecting table 4 is driven to rotate, the upper connecting table 4 drives the spray head 10 to rotate, the orientation of the nozzle 1001 is changed, the upper half of the metal outer pipe 1 is inserted into a pipe to be welded, and the spray head 10 on the metal outer pipe 1 can be aligned with the welding position, the nozzle 1001 can be aligned with the welding position at all times only when the spray head 10 does not collide with the inner wall of the pipe when air is sprayed to the welding position, the protected welding point can be better protected and rapidly cooled, the welding points are all silver-white, and the design can avoid the problem of back and forth replacement between the straight pipe type and the bent pipe type air charging pipe, and the machining efficiency is improved. The handle assembly 6 comprises a connecting rod 601, the top end of the connecting rod 601 is fixedly connected with the bottom end of the lower connecting table 5, the connecting rod 601 extends out of the metal outer pipe 1, the bottom end of the connecting rod 601 is fixedly provided with a knob piece 602, the lower connecting table 5 and the knob piece 602 are connected through the connecting rod 601, so that when the lower connecting table 5 needs to be rotated, the knob piece 602 can be twisted to drive the connecting rod 601 to rotate, and the connecting rod 601 drives the lower connecting table 5 to rotate. The bottom of the metal outer pipe 1 is fixedly provided with a handle 7, the handle 7 is rotationally sleeved on the connecting rod 601, and the handle 7 is provided with anti-skid lines, when operating, a worker can hold the handle 7 with one hand, hold the metal outer pipe 1 as an outer main body, and pinch the knob piece 602 with the other hand, so that the spray head 10 only rotates in a small range (the connecting spring 3 can be elastically twisted under the condition of external vibration or hand shaking, and then the spray head 10 can rotate in a small range) during the air charging process, and the spray head 10 does not obviously deviate from the welding position; The two-piece stainless steel ball valve 14 is communicated with the gas inlet pipe 9 away from the metal outer pipe 1, and the ball valve external thread 15 is communicated with the two-piece stainless steel ball valve 14 away from the gas inlet pipe 9. The two-piece stainless steel ball valve 14 and the ball valve external thread 15 are arranged to communicate the argon pipeline with the gas inlet pipe 9, and to control whether the argon is introduced by opening and closing the two-piece stainless steel ball valve 14. The metal outer pipe 1 is welded by the front outer shell 101 and the rear outer shell 102, and the gas inlet pipe 9 is integrally formed with the metal outer pipe 1. Compared with the metal pipe that is integrally stretched, this mode can better connect the spring 3, the upper connecting table 4, the lower connecting table 5 and other structures installed in the metal outer pipe 1. During installation, only the connecting spring 3, the upper connecting table 4, the lower connecting table 5 and other structures need to be installed, and then the front outer shell 101 and the rear outer shell 102 are welded together. The outer wall of the connecting spring 3 movably sleeves the metal inner pipe 2, the bending degree of the metal inner pipe 2 is consistent with the metal outer pipe 1, the top end and the bottom end of the metal inner pipe 2 are fixedly installed with the mounting seat 11, the upper connecting end 301 and the lower connecting end 302 are rotatably connected with the mounting seat 11 through bearings, the outer wall of the mounting seat 11 is detachably provided with the fixed assembly 12, the fixed assembly 12 is fixedly connected with the inner wall of the metal outer pipe 1, and the metal inner pipe 2 is arranged to guide and limit the connecting spring 3, so as to limit the bending angle and the bending degree of the connecting spring 3. Because the upper connecting end 301 and the lower connecting end 302 on the connecting spring 3 are rotatably connected with the mounting seat 11 on the metal inner pipe 2 through bearings, the connecting spring 3 cannot be separated from the metal inner pipe 2, and the fixed assembly 12 is arranged to fixedly connect the mounting seat 11 with the metal outer pipe 1, so as to fixedly connect the metal inner pipe 2 with the metal outer pipe 1. The fixed assembly 12 includes the fixed ring 1201 and the connecting piece 1202, the fixed ring 1201 is threadedly sleeved on the outer wall of the mounting seat 11, the connecting piece 1202 is fixedly installed on the fixed ring 1201, and three connecting pieces 1202 are arranged on one fixed ring 1201, and the end of the connecting piece 1202 away from the fixed ring 1201 is fixedly connected with the inner wall of the metal outer pipe 1. Because the fixed ring 1201 is threadedly sleeved on the mounting seat 11, the fixed ring 1201 can be removed from the mounting seat 11. The inner wall of the metal outer pipe 1 is connected with the fixed ring 1201 through the connecting piece 1202, so that a gap is left between the outer side of the fixed ring 1201 and the inner side of the metal outer pipe 1 for the argon to pass through. The metal inner pipe 2 is welded by the front inner layer pipe 201 and the rear inner layer pipe 202, and the mounting seat 11 is integrally formed with the metal inner pipe 2. This design makes it easier to install the upper connecting end 301, the lower connecting end 302 and the connecting spring 3 in the metal inner pipe 2. After the upper connecting end 301, the lower connecting end 302 and the connecting spring 3 are installed in the front inner layer pipe 201, the rear inner layer pipe 202 is aligned with the front inner layer pipe 201 and then welded. The outer wall of the metal inner tube 2 is sleeved with a porous support 13 made of foam ceramic, the porous support 13 is staggered with the mounting seat 11 on the metal inner tube 2, the porous support 13 is arranged to support the gap between the metal outer tube 1 and the metal inner tube 2, increase the compression resistance and deformation resistance of the entire inflatable structure, and the porous support 13 made of foam ceramic can allow the argon to pass normally, and the foam ceramic itself has low density and good heat insulation performance, which will not significantly increase the weight of the entire inflatable structure; The porous support 13 is divided into two parts, and the upper half of the porous support 13 is sleeved on the curved section of the metal inner tube 2, and the lower half of the porous support 13 is sleeved on the vertical section of the metal inner tube 2, so that the porous support 13 can be sleeved on the metal inner tube 2 without being affected by the curved section and the vertical section of the metal inner tube 2.

[0021] Working principle: when in use, the upper connecting end 301, the lower connecting end 302 and the connecting spring 3 are installed in the front inner layer tube 201, then the rear inner layer tube 202 is welded to the front inner layer tube 201, then the upper and lower two sections of the porous support 13 are sleeved on the metal inner tube 2 respectively, the fixing ring 1201 is threadedly sleeved on the mounting seat 11, the lower connecting table 5 is welded to the connecting rod 601, the upper connecting table 4 is welded to the spray head 10, then this part of structure is installed in the front outer layer shell 101, the rear outer layer shell 102 is combined with the front outer layer shell 101, then the front outer layer shell 101 and the rear outer layer shell 102 are welded together, after welding, the sealing performance of the welded part is detected, the worker connects the argon pipeline with the ball valve external connecting thread 15, then holds the handle 7 with one hand and pinches the knob piece 602 with the other hand, twists the knob piece 602 to rotate, thereby driving the connecting rod 601 to rotate, the connecting rod 601 drives the lower connecting table 5 to rotate, thereby driving the lower connecting end 302 to rotate, the torsion of the lower connecting end 302 when rotating is transmitted to the connecting spring 3, the connecting spring 3 rotates to drive the upper connecting end 301 to rotate, thereby driving the upper connecting table 4 to rotate, the upper connecting table 4 drives the spray head 10 to rotate, changes the orientation of the nozzle 1001, so that after the metal outer tube 1 is inserted into the to-be-welded elbow pipe, the nozzle 1001 can be aligned with the welding position, the two-piece stainless steel ball valve 14 is opened to allow the argon to enter the gas inlet pipe 9 from the ball valve external connecting thread 15, then enter the metal outer tube 1, the argon in the metal outer tube 1 enters the spray head 10 from the metal outer tube 1, then is sprayed to the welding position from the nozzle 1001 on the spray head 10, so that the welding position can be protected and rapidly cooled.

[0022] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the present application.

Claims

1. A nozzle-rotatable spot welding gas-filling structure, comprising a metal outer tube (1), characterized in that: The upper half of the metal outer tube (1) is bent at 90°. An air inlet pipe (9) is connected to the metal outer tube (1). A nozzle (10) is rotatably connected to the top of the metal outer tube (1) through a bearing. A nozzle (1001) is provided on the nozzle (10). A connecting spring (3) is provided inside the metal outer tube (1). An upper connecting end (301) is fixedly installed at the top of the connecting spring (3), and a lower connecting end (302) is fixedly installed at the bottom of the connecting spring (3). A lower connecting platform (5) is fixedly installed at the bottom of the lower connecting end (302). The lower connecting platform (5) rotates with the metal outer tube (1) through a sealed bearing (8). A handle assembly (6) is fixedly installed at the bottom of the lower connecting platform (5). An upper connecting platform (4) is fixedly installed on the outer wall of the lower connecting end (302). The end of the upper connecting platform (4) is fixedly connected to the nozzle (10).

2. The nozzle-rotatable spot welding gas-filling structure according to claim 1, characterized in that: The handle assembly (6) includes a connecting rod (601), the top end of which is fixedly connected to the bottom end of the lower connecting platform (5), the connecting rod (601) extends outside the metal outer tube (1), and a knob plate (602) is fixedly installed at the bottom end of the connecting rod (601).

3. The nozzle-rotatable spot welding gas-filling structure according to claim 1, characterized in that: The bottom of the metal outer tube (1) is fixedly installed with a handle (7), and the handle (7) is rotatably sleeved on the connecting rod (601). The handle (7) is provided with anti-slip texture.

4. The nozzle-rotatable spot welding gas-filling structure according to claim 1, characterized in that: The end of the air intake pipe (9) away from the metal outer pipe (1) is connected to a two-piece stainless steel ball valve (14), and the end of the two-piece stainless steel ball valve (14) away from the air intake pipe (9) is connected to a ball valve external thread (15).

5. The nozzle-rotatable spot welding gas-filling structure according to claim 1, characterized in that: The metal outer tube (1) is welded from the front outer shell (101) and the rear outer shell (102), and the air intake pipe (9) is integrally formed with the metal outer tube (1).

6. The nozzle-rotatable spot welding gas-filling structure according to claim 1, characterized in that: The outer wall of the connecting spring (3) is movably fitted with a metal inner tube (2). The bending degree of the metal inner tube (2) is the same as that of the metal outer tube (1). The top and bottom ends of the metal inner tube (2) are fixedly installed with mounting seats (11). The upper connecting end (301) and the lower connecting end (302) are rotatably connected to the mounting seat (11) through bearings. The outer wall of the mounting seat (11) is detachably equipped with a fixing component (12). The fixing component (12) is fixedly connected to the inner wall of the metal outer tube (1).

7. The nozzle-rotatable spot welding gas-filling structure according to claim 6, characterized in that: The fixing component (12) includes a fixing ring (1201) and a connecting piece (1202). The fixing ring (1201) is threaded onto the outer wall of the mounting base (11). The connecting piece (1202) is fixedly installed on the fixing ring (1201). There are three connecting pieces (1202) on one fixing ring (1201). The end of the connecting piece (1202) away from the fixing ring (1201) is fixedly connected to the inner wall of the metal outer tube (1).

8. The nozzle-rotatable spot welding gas-filling structure according to claim 6, characterized in that: The metal inner tube (2) is welded from the front inner tube (201) and the rear inner tube (202), and the mounting base (11) is integrally formed with the metal inner tube (2).

9. The nozzle-rotatable spot welding gas-filling structure according to claim 6, characterized in that: The outer wall of the metal inner tube (2) is slidably fitted with a porous support (13) made of foam ceramic, and the porous support (13) is offset from the mounting seat (11) on the metal inner tube (2).

10. A nozzle-rotatable spot welding gas-filling structure according to claim 9, characterized in that: The porous support (13) is divided into upper and lower parts, with the upper part of the porous support (13) fitted onto the curved section of the metal inner tube (2) and the lower part of the porous support (13) fitted onto the vertical section of the metal inner tube (2).

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