Rotary joint of argon arc welding gun

Abstract

The utility model relates to the technical field of argon arc welding, in particular to a rotary joint of an argon arc welding gun, which comprises a joint outer pipe divided into an upper section and a lower section, the upper section is used for being connected with an air inlet pipe in the welding gun, the lower section is used for being connected with an external argon conveying device, and the rotary joint further comprises a connecting section fixedly connected with the lower section. A mounting hole capable of containing the connecting section is formed in the lower section, the connecting section is rotationally connected with the upper section, a rotating hole capable of containing the connecting section is formed in the upper section, the connecting section comprises a limiting ring and a connecting pipe and is in a T shape, a transverse plate is arranged in the upper section, the rotating hole in the upper section is formed in the transverse plate, and the limiting ring is arranged above the transverse plate. A rotating table is further arranged between the limiting ring and the connecting pipe and arranged in the rotating hole, a first step is formed between the rotating table and the connecting pipe, and the lower section abuts against the first step. According to the rotary joint of the argon arc welding gun, relative rotation of the upper section and the lower section is achieved by arranging the connecting section, torsion of the air pipe is avoided, and normal argon arc welding is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of argon arc welding, in particular to a rotary joint of an argon arc welding gun. Background Art

[0002] Argon arc welding technology is a welding technology based on the principle of ordinary arc welding. It uses argon gas to protect metal welding materials. Through high current, the welding materials are melted into liquid on the base material to form a molten pool, so that the metal to be welded and the welding materials can achieve metallurgical bonding. Because argon gas is continuously supplied during high-temperature molten welding, the welding materials cannot come into contact with oxygen in the air, thereby preventing oxidation of the welding materials.

[0003] After searching, the patent with publication number CN105312733A discloses a flexible argon arc welding gun, including a welding gun head and a grip connected to the end of the welding gun head, an air intake pipe is arranged in the grip, and an air intake joint is arranged at the end of the air intake pipe. The air intake pipe is directly connected to an external argon gas delivery device through the air intake joint, but in the actual welding process, it is found that in order to facilitate welding, the angle of the grip is adjusted. Under the restriction of the joint, the air pipe or the gun line is prone to excessive twisting, thereby affecting the normal delivery of argon gas. Utility Model Content

[0004] In order to solve the problem that the existing air pipe joint structure is fixed and easily causes excessive twisting of the air pipe during use, the utility model provides an argon arc welding gun rotary joint, which realizes relative rotation of the upper and lower sections of the joint outer tube by arranging a connecting section, avoids twisting of the air pipe, and ensures normal argon arc welding.

[0005] The utility model provides a argon arc welding gun rotary joint, including a joint outer tube, the joint outer tube is divided into an upper section and a lower section, the upper section is used to connect with the air inlet pipe in the welding gun, the lower section is used to connect with an external argon gas delivery device, and also includes a connecting section, the connecting section is fixedly connected with the lower section, a mounting hole for accommodating the connecting section is provided in the lower section, the connecting section is rotatably connected with the upper section, and a rotating hole for accommodating the connecting section is provided in the upper section. By setting the connecting section, the connecting section is fixedly connected with the lower section and rotatably connected with the upper section, so that the connecting section can drive the lower section to rotate relative to the upper section, effectively avoiding the twisting of the air pipe.

[0006] Furthermore, the connecting section includes a limiting ring and a pipe, and is T-shaped, a transverse plate is arranged in the upper section, a rotation hole in the upper section is arranged on the transverse plate, and the limiting ring is arranged above the transverse plate. The fixing and relative rotation of the connecting section are achieved through the cooperation of the transverse plate and the limiting ring.

[0007] Furthermore, a rotating platform is provided between the limiting ring and the connecting pipe, the rotating platform is placed in the rotating hole, a step 1 is formed between the rotating platform and the connecting pipe, and the lower section abuts against the step 1. Through the setting of the step 1, the rotating platform can stably rotate in the rotating hole.

[0008] Furthermore, the height of the rotating platform is greater than the thickness of the horizontal plate, so that a gap H is formed between the limit ring and the horizontal plate, 0.03mm≤H≤0.06mm. Setting the gap H can not only ensure smooth rotation, but also avoid arcing.

[0009] Furthermore, the horizontal plate divides the upper section into an upper cavity and a lower cavity, the upper cavity is threaded with a gas nozzle, the upper cavity is provided with an external thread, and the lower section is rotatably arranged in the lower cavity. The external thread of the upper cavity is connected to the air inlet pipe in the welding gun.

[0010] Further, the lower section includes a base and an inner tube, the inner tube is rotatably arranged in the lower cavity, and a step 2 is formed between the base and the inner tube for the lower cavity to abut against. Through the setting of the step 2, the lower section is confined in the lower cavity of the upper section.

[0011] Furthermore, an annular groove for accommodating a sealing ring is formed on the outer wall of the inner tube, and at least two annular grooves are provided. The upper section and the lower section are sealed and connected by at least two sealing rings to avoid air leakage.

[0012] Furthermore, a gasket is provided between the base and the lower cavity, and the gasket is placed on step 2. The gasket is made of plastic material, which can prevent arcing from occurring after the base and the lower cavity rotate frequently.

[0013] The beneficial effects of the utility model are:

[0014] The utility model provides a argon arc welding gun rotary joint. Through the setting of the rotary joint, the gas pipe can be rotated according to the actual welding angle of the welding gun, avoiding the twisting of the gun line or the gas pipe, and effectively improving the welding efficiency; by setting a certain gap H between the connecting section and the cross plate, not only the rotation stability is guaranteed, but also the generation of electric arc can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the external structure of the rotary joint;

[0017] Figure 2 It is a schematic diagram of the internal structure of the rotary joint;

[0018] Figure 3 yes Figure 2 The enlarged view of point B in the figure;

[0019] Figure 4 is an exploded schematic diagram of a rotary joint;

[0020] In the figure, 1. upper section, 11. rotating hole, 12. horizontal plate, 13. upper cavity, 14. lower cavity, 2. lower section, 21. mounting hole, 22. base, 23. inner tube, 24. step two, 25. annular groove, 3. connecting section, 31. limiting ring, 32. connecting pipe, 33. rotating table, 34. step one, 4. air nozzle, 5. gasket. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] The traditional argon arc welding gun joint includes an upper section 1 and a lower section 2. The upper section 1 and the lower section 2 are both provided with a through-hole in the center. The upper section 1 is used to connect with the air inlet pipe in the welding gun, and the lower section 2 is used to connect with the external argon gas delivery device. The screw connection is generally adopted. During the welding process, the air pipe will twist, affecting the normal delivery of argon gas. In order to avoid twisting, a argon arc welding gun rotary joint is designed, such as Figure 1 As shown, it also includes a connecting section 3, which is fixedly connected to the lower section 2, and a mounting hole 21 for accommodating the connecting section 3 is provided in the lower section 2. The connecting section 3 is rotatably connected to the upper section 1, and a rotating hole 11 for accommodating the connecting section 3 is provided in the upper section 1. The fixedly connected connecting section 3 and the lower section 2 are an integral whole, and the integral whole can rotate relative to the upper section 1 during the welding process, that is, the air inlet pipe can rotate with the welding angle of the welding gun, thereby effectively avoiding twisting and ensuring the normal delivery of argon gas.

[0023] like Figure 2 and 4 As shown, the connecting section 3 includes a limiting ring 31 and a connecting pipe 32, and is T-shaped. A transverse plate 12 is provided in the upper section 1, and the rotation hole 11 in the upper section 1 is provided on the transverse plate 12, and the limiting ring 31 is provided above the transverse plate 12. A rotating platform 33 is also provided between the limiting ring 31 and the connecting pipe 32, and the rotating platform 33 is placed in the rotation hole 11. A step 1 34 is formed between the rotating platform 33 and the connecting pipe 32, and the lower section 2 abuts against the step 1 34. The connecting section 3 is fixed by the cooperation of the step 1 34 and the lower section 2, so that the rotating platform 33 can rotate stably in the rotation hole 11.

[0024] like Figure 3As shown, the height of the rotating platform 33 is greater than the thickness of the horizontal plate 12, and the gap H is formed between the limiting ring 31 and the horizontal plate 12, 0.03mm≤H≤0.06mm. In order not to hinder the relative rotation of the upper section 1 and the lower section 2, H cannot be less than 0.03mm, but in order to avoid arcing due to excessive spacing, H cannot be greater than 0.06mm. Therefore, the spacing between the bottom surface of the limiting ring 31 and the upper surface of the horizontal plate 12 is set to 0.03mm≤H≤0.06mm.

[0025] like Figure 2 As shown, specifically, the horizontal plate 12 divides the upper section 1 into an upper cavity 13 and a lower cavity 14, the upper cavity 13 is threaded with a gas nozzle 4, the upper cavity 13 is provided with an external thread, and the lower section 2 is rotatably arranged in the lower cavity 14. The air inlet pipe of the welding gun is threadedly connected to the upper cavity 13.

[0026] Specifically, the lower section 2 includes a base 22 and an inner tube 23, the inner tube 23 is rotatably disposed in the lower cavity 14, and a second step 24 is formed between the base 22 and the inner tube 23 for the lower cavity 14 to abut against. The cooperation between the second step 24 and the connecting section 3 can restrict the inner tube 23 of the lower section 2 in the lower cavity 14.

[0027] In order to ensure the sealed connection between the upper section 1 and the lower section 2, an annular groove 25 for accommodating a sealing ring is provided on the outer wall of the inner tube 23, and at least two annular grooves 25 are provided.

[0028] like Figure 1 As shown, in order to avoid arcing, a gasket 5 is provided between the base 22 and the lower cavity 14. The gasket 5 is placed on the second step 24. The gasket 5 is made of plastic insulating material, which can effectively prevent arcing caused by frequent rotation.

[0029] The above description is only illustrative rather than restrictive of the present invention. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all will fall within the scope of protection of the present invention.

Claims

1. A argon arc welding gun rotary joint, comprising a joint outer tube, the joint outer tube is divided into an upper section (1) and a lower section (2), the upper section (1) is used to connect to an air inlet pipe in the welding gun, and the lower section (2) is used to connect to an external argon gas delivery device, Features: The invention also comprises a connecting section (3), wherein the connecting section (3) is fixedly connected to the lower section (2), wherein a mounting hole (21) capable of accommodating the connecting section (3) is provided in the lower section (2), and wherein the connecting section (3) is rotatably connected to the upper section (1), wherein a rotating hole (11) capable of accommodating the connecting section (3) is provided in the upper section (1).

2. The argon arc welding torch rotary joint according to claim 1, characterized in that: The connecting section (3) comprises a limiting ring (31) and a connecting pipe (32) and is T-shaped. A transverse plate (12) is provided in the upper section (1), the rotating hole (11) in the upper section (1) is arranged on the transverse plate (12), and the limiting ring (31) is arranged above the transverse plate (12).

3. The argon arc welding torch rotary joint according to claim 2, characterized in that: A rotating platform (33) is also provided between the limiting ring (31) and the connecting pipe (32); the rotating platform (33) is placed in the rotating hole (11); a step one (34) is formed between the rotating platform (33) and the connecting pipe (32); and the lower section (2) abuts against the step one (34).

4. The argon arc welding torch rotary joint according to claim 3, characterized in that: The height of the rotating platform (33) is greater than the thickness of the transverse plate (12), and a gap H is formed between the limiting ring (31) and the transverse plate (12), and the gap H is 0.03 mm ≤ H ≤ 0.06 mm.

5. The argon arc welding torch rotary joint according to claim 2, characterized in that: The transverse plate (12) divides the upper section (1) into an upper cavity (13) and a lower cavity (14); a gas nozzle (4) is threadedly connected inside the upper cavity (13); an external thread is provided outside the upper cavity (13); and the lower section (2) is rotatably arranged in the lower cavity (14).

6. The argon arc welding torch rotary joint according to claim 5, characterized in that: The lower section (2) comprises a base (22) and an inner tube (23); the inner tube (23) is rotatably arranged in the lower cavity (14); a second step (24) is formed between the base (22) and the inner tube (23) for the lower cavity (14) to abut against.

7. The argon arc welding torch rotary joint according to claim 6, characterized in that: The outer wall of the inner tube (23) is provided with an annular groove (25) capable of accommodating a sealing ring, and at least two annular grooves (25) are provided.

8. The argon arc welding torch rotary joint according to claim 6, characterized in that: A gasket (5) is provided between the base (22) and the lower cavity (14), and the gasket (5) is placed on the second step (24).

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