A welding gas shielding device and welding torch

Abstract

The utility model provides a kind of welding gas protection device and welding torch, wherein, welding gas protection device includes protective cover, and the first end of protective cover is connected with protection gas source and second end is equipped with gas outlet;Protective cover inside is filled with gas dispersing member, and gas dispersing member is connected by several layers of metal woven mesh sintering;In the welding gas protection device of the utility model, protective gas will pass through gas dispersing member after entering protective cover, and when protective gas passes through the eye of several layers of metal woven mesh in gas dispersing member, it will be scattered to make gas can be evenly dispersed in welding area, so that a small amount of protective gas can be evenly covered in welding area.

Description

Technical Field

[0001] This utility model relates to the field of argon arc welding technology, and more specifically, to a welding gas protection device and a welding torch. Background Technology

[0002] In argon arc welding technology, argon gas is introduced around the tungsten electrode and welding wire as an inert protective gas to prevent high-temperature oxidation of the weldment. For example, in the argon arc welding gas protection device disclosed in patent CN219520790U, two sets of protective gas pipes are set to introduce protective gas into the welding area. It can cover the welding area with protective gas to a certain extent, but in order to achieve sufficient coverage of protective gas, it consumes a large amount of protective gas and it is still difficult to make the protective gas evenly dispersed. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings mentioned in the background art and to provide a welding gas protection device and welding torch.

[0004] The objective of this utility model is achieved through the following technical solution: In a first aspect, this utility model provides a welding gas protection device, including a protective cover, wherein a first end of the protective cover is connected to a protective gas source and a second end is provided with a gas outlet; The protective cover is filled with a gas dispersing element, which is composed of several layers of sintered metal woven mesh.

[0005] In the welding gas protection device of this utility model, the protective gas passes through the gas dispersing component after entering the protective cover. When the protective gas passes through the holes of several layers of metal woven mesh in the gas dispersing component, it is dispersed so that the gas can be evenly dispersed in the welding area, so that a small amount of protective gas can achieve uniform coverage in the welding area.

[0006] Furthermore, the following improvements can be made to a type of welding gas shielding device: Furthermore, a jacket for mounting a tungsten electrode is coaxially disposed inside the protective cover, and the gas dispersion component is filled in the cavity between the outer wall of the jacket and the inner wall of the protective cover. By coaxially distributing the tungsten electrode and the protective cover, the protection of the welding area can be better achieved.

[0007] Furthermore, the first end of the clamping cavity is closed and the second end is filled with the gas dispersant. The protective gas source is connected to the clamping cavity, so that the protective gas can only be dispersed and discharged through the gas dispersant.

[0008] Furthermore, a notch for threading welding wire is provided on the second end sidewall of the protective cover, so that the welding area can be covered inside the protective cover.

[0009] Furthermore, the gas dispersant is supported at the second end of the clamping cavity by a retaining ring, making it less likely for the gas dispersant to fall off.

[0010] Alternatively, in another type of welding gas shielding device, the following improvements can be made: Furthermore, the protective cover includes a protective cover body and two sets of air chambers, the first end of the protective cover body is connected to the two sets of air chambers, and the second end of the protective cover body is provided with the air outlet; Each set of gas chambers is connected to the protective gas source, and each set of gas chambers is equipped with a set of gas dispersants, so that the protective gas can be output from multiple sources.

[0011] Furthermore, a jacket for mounting a tungsten electrode is coaxially disposed within the protective cover body, and two sets of gas chambers are symmetrically arranged on both sides of the jacket.

[0012] Furthermore, the outer contour of the protective cover body is shaped like a platform, the two sets of gas chambers are connected to the end of the protective cover body with a larger contour, and the gas outlet is located at the end of the protective cover body with a smaller contour, so that the protective gas after being evenly dispersed by the gas dispersant can be concentrated around the welding area.

[0013] Secondly, this utility model also provides a welding torch with a welding gas protection device.

[0014] For example, it could be a circumferential welding torch or a narrow-gap welding torch equipped with a welding gas protection device. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of a welding gas protection device provided in one embodiment of this utility model; Figure 2 A schematic diagram of a narrow gap welding torch structure provided for another embodiment of this utility model; The attached diagram lists the components represented by each number as follows: 10. Protective cover; 10a. Protective cover body; 10b. Gas chamber; 11. Jacket; 12. Clamping cavity; 13. Gas dispersion component; 14. Notch; 15. Retaining ring; 20. Tungsten electrode; 21. Wire feeding tube. Detailed Implementation

[0016] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0017] Example 1: This embodiment provides a welding gas protection device, including a protective cover 10. The first end of the protective cover 10 is connected to a protective gas source and the second end is provided with a gas outlet. The protective cover 10 is filled with a gas dispersing component 13, wherein the gas dispersing component 13 is composed of several layers of metal woven mesh sintered and connected, so that the several layers of metal woven mesh are sintered into an integral structure, and the integral structure is the gas dispersing component 13.

[0018] Therefore, during argon arc welding, the protective gas supplied by the protective gas source passes through the gas distributor 13 after entering the protective cover 10. The protective gas is dispersed as it passes through the holes of several layers of metal woven mesh in the gas distributor 13, so that the protective gas can be evenly dispersed in the welding area.

[0019] Among them, the several layers of metal woven wire mesh in the gas dispersion component 13 are manufactured by combining lamination pressing and vacuum sintering processes, and have high mechanical strength and overall rigidity.

[0020] Example 2: Reference Figure 1 Based on Embodiment 1, this embodiment also provides a welding gas protection device.

[0021] In this welding gas protection device, a jacket 11 is coaxially arranged inside the protective cover 10. The jacket 11 is used to install a tungsten electrode (not shown). In this embodiment, the jacket 11 has a cylindrical structure, and the tungsten electrode can pass through the jacket 11 to enter the protective cover 10.

[0022] The gas dispersant 13 is filled in the cavity 12 between the outer wall of the jacket 11 and the inner wall of the protective cover 10. The outer contour of the gas dispersant 13 is adapted to the inner wall contour of the protective cover 10, and the inner contour of the gas dispersant 13 is adapted to the outer wall contour of the jacket 11.

[0023] Reference Figure 1 When both the protective cover 10 and the jacket 11 are cylindrical, the gas dispersant 13 is annular.

[0024] Since the jacket 11 and the protective cover 10 are coaxially arranged, during argon arc welding, the gas dispersed by the gas distributor 13 can be more evenly distributed around the tungsten electrode and the welding wire, thus better protecting the welding area.

[0025] The sleeve 11 can be connected to the inner wall of the protective cover 10 via a bracket. In this case, if the first end of the sleeve 11 is not sealed to the first end of the protective cover 10, that is, if the first end of the clamping cavity 12 is not sealed, This would cause some of the protective gas to seep out along the inside of the jacket 11 without being uniformly dispersed by the gas distributor 13, which would reduce the dispersion effect of the protective gas.

[0026] Therefore, to solve the above situation, the first end of the clamping cavity 12 can be closed, so that the first end of the jacket 11 is sealed to the first end of the protective cover 10. At this time, a gas dispersant 13 is filled at the second end of the clamping cavity 12, the protective gas source is connected to the clamping cavity 12, and the protective gas introduced into the clamping cavity 12 can only be dispersed by the gas dispersant 13 and then discharged.

[0027] It is easy to understand that: the first end of the sleeve 11 can be welded to the first end of the protective cover 10, or the sleeve 11 can be integrally formed with the protective cover 10, or the first end of the sleeve 11 can penetrate through the first end of the protective cover 10, and the outer wall of the sleeve 11 and the tube hole on the first end of the protective cover 10 are sealed by a sealing ring.

[0028] When the first end of the sleeve 11 is welded to the first end of the protective cover 10, or when the sleeve 11 and the protective cover 10 are integrally formed, the sleeve 11 and the protective cover 10 have good connection strength. In this case, the aforementioned bracket may not be provided between the sleeve 11 and the protective cover 10.

[0029] Reference Figure 1 In this embodiment, a notch 14 for threading welding wire is also provided on the second end sidewall of the protective cover 10, so that the tungsten electrode and the welding wire can be simultaneously enclosed inside the second end of the protective cover 10, reducing the leakage and waste of protective gas.

[0030] Reference Figure 1 When in use, the second end of the protective cover 10 faces downwards. Therefore, in order to prevent the gas dispersant 13 from falling off, the gas dispersant 13 can be supported at the second end of the clamping cavity 12 by the retaining ring 15.

[0031] Example 3: Reference Figure 2 Based on Embodiment 1, this embodiment provides a welding gas protection device.

[0032] In this embodiment, the protective cover 10 includes a protective cover body 10a and two sets of air chambers 10b. The first end of the protective cover body 10a is connected to the two sets of air chambers 10b, and the second end of the protective cover body 10a is provided with an air outlet.

[0033] Each gas chamber 10b is connected to a protective gas source and is supplied with gas independently. Each gas chamber 10b is equipped with a gas dispersion element 13, so that the protective gas can be output from multiple sources.

[0034] Reference Figure 2 A jacket 11 for mounting the tungsten electrode 20 is coaxially arranged inside the protective cover body 10a, and two sets of gas chambers 10b are symmetrically arranged on both sides of the jacket 11.

[0035] In addition, the extension lines of the two gas chambers 10b in the gas outlet direction intersect, so that the protective gas output from the two gas chambers 10b can be evenly dispersed around the tungsten electrode 20.

[0036] In addition, in order to better gather the protective gas after it has been dispersed and homogenized by the gas dispersant 13, in this embodiment, the outer contour of the protective cover body 10a is a flattened platform shape. The flattening allows it to enter the narrow gap of the workpiece. The platform shape makes the two end face contours of its two ends inconsistent in size, and the two sets of gas chambers 10b are connected at the end with the larger end face contour of the protective cover body 10a, and the gas outlet is located at the end with the smaller end face contour of the protective cover body 10a.

[0037] Example 4: This embodiment provides a welding torch that has the welding gas protection device described in Embodiment 1.

[0038] Example 5: This embodiment provides a circumferential weld torch, which has the welding gas protection device described in Embodiment 2.

[0039] Example 6: Reference Figure 2 This embodiment provides a narrow gap welding torch, which has the welding gas protection device of Embodiment 3.

[0040] Among them, the wire feeding tube 21 of the narrow gap welding torch is used to feed the welding wire, and the output ends of the two sets of wire feeding tubes 21 are evenly arranged on both sides of the lower end of the tungsten electrode 20.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A welding gas protection device, comprising a protective cover, wherein a first end of the protective cover is connected to a protective gas source and a second end is provided with a gas outlet, characterized in that: The protective cover is filled with a gas dispersing element, which is composed of several layers of sintered metal woven mesh.

2. The welding gas protection device according to claim 1, characterized in that, The protective cover is coaxially provided with a jacket for mounting a tungsten electrode, and the gas dispersion component is filled in the cavity between the outer wall of the jacket and the inner wall of the protective cover.

3. The welding gas protection device according to claim 2, characterized in that, The first end of the clamping cavity is closed and the second end is filled with the gas dispersant, and the protective gas source is connected to the clamping cavity.

4. The welding gas protection device according to claim 3, characterized in that, The second end sidewall of the protective cover also has a notch for threading welding wire.

5. The welding gas protection device according to claim 2, characterized in that, The gas dispersion element is supported at the second end of the clamping cavity by a retaining ring.

6. The welding gas protection device according to claim 1, characterized in that, The protective cover includes a protective cover body and two sets of air chambers. The first end of the protective cover body is connected to the two sets of air chambers, and the second end of the protective cover body is provided with the air outlet. Each set of gas chambers is connected to the protective gas source, and each set of gas chambers is equipped with a set of gas dispersants.

7. The welding gas protection device according to claim 6, characterized in that, The protective cover body is coaxially provided with a jacket for installing a tungsten electrode, and two sets of gas chambers are symmetrically arranged on both sides of the jacket.

8. The welding gas protection device according to claim 6, characterized in that, The outer contour of the protective cover body is shaped like a platform. The two sets of air chambers are connected to the end of the protective cover body with a larger contour, and the air outlet is located at the end of the protective cover body with a smaller contour.

9. A circumferential weld torch, characterized in that, The circumferential welding torch is equipped with a welding gas protection device as described in any one of claims 2 to 5.

10. A narrow gap welding torch, characterized in that, The narrow-gap welding torch is equipped with a welding gas protection device as described in any one of claims 6 to 8.

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