Auxiliary protective cover device for argon arc welding

Abstract

The utility model discloses an argon arc welding auxiliary protective cover device, which belongs to the technical field of welding equipment, and comprises a lantern ring and a cover body, the cover body comprises a back plate, a gas nozzle pipe arranged on the back plate, an upper baffle plate and a lower baffle plate, the upper baffle plate and the lower baffle plate are connected with the back plate, and a containing groove for containing gas is formed among the back plate, the upper baffle plate and the lower baffle plate. And the air tap pipe is communicated with the accommodating groove. The welding gun cover can be conveniently and stably connected with a welding gun head, and the position of the cover body can be conveniently adjusted according to different parts to be welded; a protective gas space is formed at the to-be-welded part, so that the subsequent welding quality and efficiency are improved; and the gas dispersion screen plate is arranged in the cover body, so that the uniform dispersion of the protective gas in the accommodating groove is improved, the air content in the accommodating groove is reduced, and the welding quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding equipment, and in particular relates to an auxiliary protective cover device for argon arc welding. 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. Since argon gas is continuously supplied during high-temperature molten welding, the welding materials cannot come into contact with oxygen in the air, thereby preventing the oxidation of the welding materials. Existing argon arc welding generally introduces argon gas at the welding gun head, but there is air around the welded surface before welding. During welding, the welded surface is easily exposed to air, which affects the welding quality. Utility Model Content

[0003] The technical problem solved by the utility model is to provide an auxiliary protective cover device for argon arc welding, which is convenient for forming a protective gas space at a workpiece to be welded during welding and improves welding quality.

[0004] Technical solution: In order to solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0005] An auxiliary protective cover device for argon arc welding includes a collar for sleeved on the outside of a welding gun head and a cover body connected to the collar, the cover body includes a back plate, a gas nozzle tube arranged on the back plate, and an upper baffle and a lower baffle connected to the back plate, a containing groove for containing gas is formed between the back plate, the upper baffle and the lower baffle, and the gas nozzle tube is connected to the containing groove.

[0006] Furthermore, the back plate is an arc-shaped plate or a straight-line plate.

[0007] Furthermore, the upper baffle plate and the lower baffle plate respectively include a plurality of unit plates, and one side edge of the unit plate is connected to the back plate.

[0008] Furthermore, a gas dispersion mesh plate is provided in the containing tank, and the gas entering from the gas nozzle tube is dispersed in the containing tank through the gas dispersion mesh plate.

[0009] Furthermore, a positioning rod for fixing the gas dispersion mesh plate is provided in the containing groove.

[0010] Furthermore, the back plate is an elastic plate, and adjacent unit plates overlap.

[0011] Furthermore, the cover body is provided with a first connecting ear, and the sleeve ring is movably connected to the cover body through the first connecting ear.

[0012] Furthermore, the sleeve ring includes an elastic ring and a connecting block, and the elastic ring is connected to a first adjusting bolt.

[0013] Furthermore, the positioning rod is a U-shaped rod, and the positioning rod is pressed against the upper baffle plate and the lower baffle plate by an elastic pre-tightening force.

[0014] Furthermore, the cover body also includes a first side plate and a second side plate.

[0015] Beneficial effects: Compared with the prior art, the utility model has the following advantages:

[0016] 1. By setting the collar and the cover, the collar can be adjusted to be tight, which is convenient for stable connection with the welding gun head. The collar can be rotated relative to the cover, which is convenient for adjusting the position of the cover according to different parts to be welded;

[0017] 2. The cover body includes a back plate and upper and lower baffles. A receiving groove is formed between the back plate and the upper and lower baffles. A gas nozzle pipe connected to the receiving groove is provided on the back plate to facilitate the introduction of protective gas, forming a protective gas space at the welded parts to improve the subsequent welding quality and efficiency;

[0018] 3. A gas dispersion mesh is set inside the hood to improve the uniform dispersion of the protective gas in the containing tank, reduce the air content in the containing tank, and help improve the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the device of the embodiment of the utility model;

[0020] Figure 2 is a schematic structural diagram of a cover body in an embodiment;

[0021] Figure 3 2 is a schematic diagram of the ring structure in the embodiment;

[0022] Figure 4 This is a schematic diagram of the main structure of the cover body in the embodiment;

[0023] Figure 5 2. It is a schematic diagram of the joint structure of the gas nozzle pipe in the embodiment;

[0024] Figure 6 Schematic diagram of the joint structure at the positioning rod in the embodiment. DETAILED DESCRIPTION

[0025] The present invention will be further explained below in conjunction with specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, an auxiliary protective cover device for argon arc welding of the utility model comprises a collar 1 and a cover body 2, the collar 1 comprises an elastic ring 11 and a connecting block 12, the elastic ring 11 is a circular ring body with a notch, two tightening plates are arranged at the notch of the elastic ring 11, and a first adjusting bolt 111 is connected to the two tightening plates of the elastic ring 11, one of the tightening plates is provided with a through hole corresponding to the first adjusting bolt 111, and the other tightening plate is provided with a threaded hole corresponding to the first adjusting bolt 111, the size of the elastic ring 11 can be adjusted by the first adjusting bolt 111, so that the collar 1 can be conveniently sleeved on the outside of the welding gun head, and Stably connected to the welding gun head; a connecting block 12 is connected under the two tightening plates of the elastic ring 11, and two connecting blocks 12 are provided. The second adjusting bolt 121 passes through one of the connecting blocks 12 and is threadedly connected to the other connecting block 12. A first connecting ear 25 is provided on the cover body 2, and a through hole is provided on the first connecting ear 25. When connected, the two connecting blocks 12 are placed on both sides of the first connecting ear 25, and the second adjusting bolt 121 passes through the through hole of the first connecting ear 25, so that the collar 1 can rotate relative to the cover body 2 with the second adjusting bolt 121 as the axis to adjust the relative positions of the collar 1 and the cover body 2.

[0027] like Figure 1 , Figure 2 and Figure 4 As shown, the cover body 2 includes a back plate 21, an upper baffle plate 22, a lower baffle plate 23, a first side plate 26 and a second side plate 27, the back plate 21 is an arc-shaped plate (when welding an arc-shaped welded part, such as the outer surface of a pipe, in order to make the cover body fit the welding surface as much as possible, the back plate 21 is set to an arc shape, and when welding a flat welded part, the back plate 21 can be set to a straight plate), the upper baffle plate 22 is connected to the upper end edge of the back plate 21, and the lower baffle plate 23 is connected to the lower end edge of the back plate 21. The upper baffle plate 22 and the lower baffle plate 23 respectively include four unit plates 201, and only the innermost edges of the four unit plates 201 are connected to the back plate 21. There is overlap between adjacent unit plates 201 in the four unit plates 201, and the overlapping parts are not welded. The back plate 21 is an elastic plate. In this embodiment, elastic steel is used. The plate is convenient for bending. When bending, the position of the outermost edge of the four unit plates 201 can be adjusted to adapt to curved surfaces of different curvatures (the outer sides of the four unit plates 201 cannot be close to the curved surface, there will be gaps, and gas escapes. The position of the outermost edge of the unit plate 201 can be adjusted to minimize the gap); the first side plate 26 is connected to the left end edge of the back plate 21, and the second side plate 27 is connected to the right end edge of the back plate 21. The width of the first side plate 26 is equal to the width of the upper baffle plate 22, and the width of the second side plate 27 is less than half of the width of the upper baffle plate 22. Since the width of the second side plate 27 is small, the shielding gas can escape from the second side plate 27. The second side plate 27 is close to the ring 1, and the ring 1 is sleeved on the welding gun head. The escaped shielding gas is located near the welding gun head, thereby improving the protection effect near the welding gun head.

[0028] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, a receiving groove 24 for receiving gas is formed between the back plate 21, the upper baffle plate 22 and the lower baffle plate 23. A gas nozzle tube 211 is provided in the middle position of the back plate 21. The gas nozzle tube 211 is used to connect to an external shielding gas source, such as an argon gas tube. The gas nozzle tube 211 is connected to the receiving groove 24, and argon gas continuously enters the receiving groove 24 from the gas nozzle tube 211. Due to the obstruction of the back plate 21, the upper baffle plate 22 and the lower baffle plate 23 and the two sides of the back plate 21 are also connected to the first side plate 26 and the second side plate 27, a space for receiving shielding gas is formed in the receiving groove 24. The shielding gas that continuously enters drives out the air in the original space, thereby facilitating subsequent welding of the welding gun head, which is beneficial to improving welding efficiency and quality.

[0029] like Figure 4 , Figure 5 and Figure 6 As shown, a gas dispersion mesh plate 3 is provided in the receiving groove 24. The gas dispersion mesh plate 3 adopts a multi-layer stainless steel mesh plate with meshes. The gas dispersion mesh plate 3 is arranged close to the back plate 21. The gas entering the gas nozzle tube 211 passes through the gas dispersion mesh plate 3 and is dispersed in the receiving groove 24, thereby improving the uniform dispersion of the protective gas and reducing the air content in the receiving groove 24, which is beneficial to improving the welding quality; two positioning rods 4 are also provided in the receiving groove 24. The positioning rod 4 is a U-shaped rod, including an upper side rod and a lower side rod. The upper side rod of the positioning rod 4 is pressed against the upper baffle 22 by an elastic preload force, and the lower side rod of the positioning rod 4 is pressed against the lower baffle 23 by an elastic preload force (the positioning rod 4 can also be connected to the upper and lower baffles by welding), thereby fixing the gas dispersion mesh plate 3 in the receiving groove 24.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An auxiliary protective cover device for argon arc welding, characterized in that: The invention comprises a collar (1) for sleeved on the outside of a welding gun head and a cover body (2) connected to the collar (1); the cover body (2) comprises a back plate (21), a gas nozzle tube (211) arranged on the back plate (21), and an upper baffle plate (22) and a lower baffle plate (23) connected to the back plate (21); a receiving groove (24) for receiving gas is formed between the back plate (21), the upper baffle plate (22) and the lower baffle plate (23); the gas nozzle tube (211) is connected to the receiving groove (24); the upper baffle plate (22) and the lower baffle plate (23) respectively comprise a plurality of unit plates (201); one side of the unit plates (201) is connected to the back plate (21); the back plate (21) is an elastic plate, and adjacent unit plates (201) overlap.

2. The argon arc welding auxiliary protective cover device according to claim 1, characterized in that: The back plate (21) is an arc-shaped plate or a straight-line plate.

3. The argon arc welding auxiliary protective cover device according to claim 2, characterized in that: A gas dispersion mesh plate (3) is provided in the containing tank (24), and the gas entering through the gas nozzle tube (211) is dispersed in the containing tank (24) after passing through the gas dispersion mesh plate (3).

4. The argon arc welding auxiliary protective cover device according to claim 3, characterized in that: A positioning rod (4) for fixing the gas dispersion screen (3) is provided in the containing groove (24).

5. The argon arc welding auxiliary protective cover device according to claim 1, characterized in that: The cover body (2) is provided with a first connecting ear (25), and the collar (1) is movably connected to the cover body (2) via the first connecting ear (25).

6. The argon arc welding auxiliary protective cover device according to claim 1, characterized in that: The sleeve ring (1) comprises an elastic ring (11) and a connecting block (12), and a first adjusting bolt (111) is connected to the elastic ring (11).

7. The argon arc welding auxiliary protective cover device according to claim 4, characterized in that: The positioning rod (4) is a U-shaped rod, and the positioning rod (4) is pressed against the upper baffle plate (22) and the lower baffle plate (23) by elastic pre-tightening force.

8. The argon arc welding auxiliary protective cover device according to claim 4, characterized in that: The cover body (2) further comprises a first side plate (26) and a second side plate (27).

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