An enhanced welding gas protection device

Abstract

This utility model discloses an enhanced welding gas protection device, comprising an outer casing, an inner tube, and a welding torch mounting tube for mounting a welding torch. One end of the outer casing is closed, and the other end is open. The welding torch mounting tube is fixedly inserted through the closed end. The outer casing has an air inlet connected to a shielding gas source, and the interior of the outer casing has an air inlet cavity communicating with the air inlet. The inner tube is located within the air inlet cavity and is positioned between the outer casing and the welding torch mounting tube, forming a first shielding gas channel and a second shielding gas channel. This utility model enhances the gas protection effect and reduces the intrusion of impurity gases by increasing the number of gas protection layers, thereby reducing welding defects such as porosity and slag inclusions and improving welding quality.

Description

Technical Field

[0001] This utility model relates to the field of ship welding technology, and in particular to an enhanced welding gas protection device. Background Technology

[0002] Gas shielded welding is a common welding method in shipbuilding. Oxygen is one of the main sources of contamination during welding. At high temperatures, oxygen reacts chemically with the molten metal in the weld pool, leading to welding defects such as porosity and slag inclusions. Using inert gases (such as argon or carbon dioxide) as shielding gases can effectively prevent oxygen from entering the welding area, thereby reducing defects. However, as industry requirements for welding quality continue to increase, and due to the influence of on-site construction environments, the gas shielding devices built into existing welding machines and torches are gradually failing to meet welding quality demands. Existing gas shielding devices can only generate a single protective gas layer, and because the protective layer is too wide, the shielding gas is not sufficiently constrained, resulting in a slow flow rate within the protective gas layer and an inability to completely isolate impurities from the air. During welding, impurities can still break through the protective gas layer and enter the weld pool, causing welding defects such as porosity and slag inclusions, leading to a decline in welding quality. Utility Model Content

[0003] The purpose of this invention is to provide an enhanced welding gas protection device. By increasing the number of gas protection layers, the gas protection effect can be enhanced, the intrusion of impurity gases can be reduced, thereby reducing the generation of welding defects such as porosity and slag inclusions, and improving welding quality.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An enhanced welding gas protection device includes an outer casing, an inner tube, and a welding torch mounting tube for mounting a welding torch. One end of the outer casing is a closed end, and the other end is an open end. The welding torch mounting tube is fixedly installed on the closed end. The outer casing has an air inlet connected to a protective gas source, and the interior of the outer casing has an air inlet cavity communicating with the air inlet. The inner tube is located within the air inlet cavity and is disposed between the outer casing and the welding torch mounting tube. A first protective gas channel is formed between the inner tube and the welding torch mounting tube, and a second protective gas channel is formed between the outer casing and the inner tube.

[0006] As a preferred embodiment of this utility model, the air inlet is connected to an air inlet pipe, and an air inlet valve is provided on the air inlet pipe.

[0007] As a preferred embodiment of this utility model, a gas acceleration ring is further provided in the air intake cavity near the open end, and the gas acceleration ring is fixedly connected to the end of the inner tube; a first gas outlet gap communicating with the first protective gas channel is formed between the inner side of the gas acceleration ring and the welding torch mounting tube, and a second gas outlet gap communicating with the second protective gas channel is formed between the outer side of the gas acceleration ring and the outer cover.

[0008] As a preferred embodiment of this utility model, when the welding torch is installed inside the welding torch mounting tube, the torch head, the open end of the outer cover, and the gas acceleration ring are flush.

[0009] As a preferred embodiment of this utility model, the welding torch mounting tube is provided with a first threaded hole, and a first bolt is threadedly connected to the first threaded hole; by screwing in the first bolt, the welding torch can be pressed tightly onto the welding torch mounting tube.

[0010] As a preferred embodiment of this utility model, the welding torch is provided with a positioning groove that mates with the first bolt.

[0011] As a preferred embodiment of this utility model, the outer cover has a plurality of second threaded holes evenly distributed along the circumferential direction, and each second threaded hole is threadedly connected to a second bolt. The end of the second bolt abuts against the outer surface of the inner tube, thereby fixing the outer cover.

[0012] As a preferred embodiment of this utility model, the inner tube is provided with a plurality of third threaded holes evenly distributed along the circumference, and each of the third threaded holes is threadedly connected to a third bolt. The end of the third bolt abuts against the outer surface of the welding gun mounting tube, thereby fixing the inner tube.

[0013] As a preferred embodiment of this utility model, the gas acceleration ring is fixedly connected to the inner tube by screws.

[0014] As a preferred embodiment of this utility model, the gas acceleration ring is welded to the inner tube.

[0015] The advantages of implementing the enhanced welding gas protection device provided by this utility model compared with the prior art are as follows:

[0016] During use, pre-fill the tooling with gas to isolate impurity gases. Install the welding torch in the torch mounting tube and aim the torch nozzle at the top of the weld seam formed by the two parts to be welded. During welding, the welding torch emits its own shielding gas, which simultaneously enters the gas inlet cavity through the gas inlet and exits through the first and second shielding gas channels. This forms a three-layer shielding gas barrier from the inside out, greatly reducing the probability of impurity gases intruding into the weld pool. This reduces welding defects such as porosity and slag inclusions caused by impurity gases intruding into the weld pool, resulting in higher weld quality and reduced rework time for welding repairs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0018] Figure 1 This is a front view of an enhanced welding gas protection device provided in an embodiment of this utility model;

[0019] Figure 2 This is a top view of an enhanced welding gas protection device provided in an embodiment of this utility model;

[0020] Figure 3 It is at Figure 2 A cross-sectional view along direction AA in the structure shown;

[0021] Figure 4 A bottom view of an enhanced welding gas protection device provided in this embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure when the welding torch is installed inside the welding torch mounting tube.

[0023] Marked in the image:

[0024] Outer casing 100; closed end 101; open end 102; air inlet 103; air inlet cavity 104; first protective gas channel 105; second protective gas channel 106; air inlet pipe 107; air inlet valve 108; second threaded hole 109; second bolt 110; inner tube 200; third threaded hole 201; third bolt 202; welding torch mounting tube 300; first threaded hole 301; first bolt 302; welding torch 400; positioning groove 401; gas acceleration ring 500; first air outlet gap 501; second air outlet gap 502; screw 503; workpiece to be welded 600; weld 601. Detailed Implementation

[0025] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0026] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. It should also be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0027] Please see Figures 1 to 5 A preferred embodiment of this utility model provides an enhanced welding gas protection device, which includes an outer cover 100, an inner tube 200, and a welding torch mounting tube 300 for mounting a welding torch 400. One end of the outer cover 100 is a closed end 101, and the other end is an open end 102. The welding torch mounting tube 300 is fixedly installed on the closed end 101. The outer cover 100 is provided with an air inlet 103 connected to a protective gas source. The interior of the outer cover 100 is provided with an air inlet cavity 104 communicating with the air inlet 103. The inner tube 200 is located inside the air inlet cavity 104 and is disposed between the outer cover 100 and the welding torch mounting tube 300. A first protective gas channel 105 is formed between the inner tube 200 and the welding torch mounting tube 300, and a second protective gas channel 106 is formed between the outer cover 100 and the inner tube 200.

[0028] According to the present invention, an enhanced welding gas protection device, such as Figure 5 As shown, during use, the tooling is pre-filled with gas to isolate impurity gases. The welding torch 400 is installed in the welding torch mounting tube 300, and the nozzle of the welding torch 400 is aligned with the upper part of the weld 601 formed by the two parts to be welded 600. During welding, the welding torch 400 sprays its own protective gas. At the same time, the protective gas enters the air inlet cavity 104 from the air inlet 103 and is sprayed out from the first protective gas channel 105 and the second protective gas channel 106 respectively. This forms a three-layer protective gas barrier from the inside out, which greatly reduces the probability of impurity gases intruding into the weld pool and reduces welding defects such as porosity and slag inclusions caused by impurity gases intruding into the weld pool. The weld 601 has a higher forming quality, and the rework time for welding repair is reduced.

[0029] For example, the air inlet 103 is connected to an air inlet pipe 107, and an air inlet valve 108 is provided on the air inlet pipe 107. Thus, the air inlet valve 108 can control the flow rate of the protective gas.

[0030] For example, a gas accelerating ring 500 is also provided in the air inlet cavity 104 near the open end 102. The gas accelerating ring 500 is fixedly connected to the end of the inner tube 200. A first gas outlet gap 501, communicating with the first protective gas channel 105, is formed between the inner side of the gas accelerating ring 500 and the welding torch mounting tube 300. A second gas outlet gap 502, communicating with the second protective gas channel 106, is formed between the outer side of the gas accelerating ring 500 and the outer cover 100. It should be noted that the gas accelerating ring 500 reduces the width of the outlet of the first protective gas channel 105 and the outlet of the second protective gas channel 106, forming a narrow gas outlet gap. This increases the flow rate of the protective gas, forms a stable protective gas barrier, and separates impurities in the air, thereby improving the welding quality.

[0031] For example, when the welding torch 400 is installed inside the welding torch mounting tube 300, the torch head of the welding torch 400, the open end 102 of the outer cover 100, and the gas acceleration ring 500 are flush. This design reduces turbulence in the shielding gas during the outflow process, making the airflow more stable, thereby enhancing the stability of the gas barrier and improving the welding quality.

[0032] In this embodiment, the connection structure between the components is as follows:

[0033] For example, the welding torch mounting tube 300 is provided with a first threaded hole 301, and a first bolt 302 is threadedly connected to the first threaded hole 301; by screwing in the first bolt 302, the welding torch 400 can be pressed tightly onto the welding torch mounting tube 300. Further, the welding torch 400 is provided with a positioning groove 401 that mates with the first bolt 302, which enables the welding torch 400 to be quickly positioned and installed in the welding torch mounting tube 300, so that the torch head, the open end 102 of the outer cover 100, and the gas acceleration ring 500 are aligned.

[0034] For example, the outer cover 100 has a plurality of second threaded holes 109 evenly distributed along the circumferential direction, and each second threaded hole 109 is threadedly connected to a second bolt 110. The end of the second bolt 110 abuts against the outer surface of the inner tube 200 to fix the outer cover 100.

[0035] For example, the inner tube 200 has a plurality of third threaded holes 201 evenly distributed along the circumferential direction, and each of the third threaded holes 201 is threadedly connected to a third bolt 202. The third bolt 202 abuts against the outer surface of the welding gun mounting tube 300 to fix the inner tube 200.

[0036] For example, the gas acceleration ring 500 is fixedly connected to the inner tube 200 by screws 503, or the gas acceleration ring 500 is welded to the inner tube 200.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An enhanced welding gas shield, characterized by, The device includes an outer casing, an inner tube, and a welding torch mounting tube for mounting a welding torch. One end of the outer casing is closed, and the other end is open. The welding torch mounting tube is fixedly installed on the closed end. The outer casing has an air inlet connected to a shielding gas source, and the interior of the outer casing has an air inlet cavity communicating with the air inlet. The inner tube is located within the air inlet cavity and is positioned between the outer casing and the welding torch mounting tube. A first shielding gas channel is formed between the inner tube and the welding torch mounting tube, and a second shielding gas channel is formed between the outer casing and the inner tube.

2. The enhanced gas shielded welding apparatus of claim 1, wherein, The air inlet is connected to an air inlet pipe, and the air inlet pipe is equipped with an air inlet valve.

3. The enhanced welding gas protection device according to claim 1, characterized in that, A gas acceleration ring is also provided near the open end in the air intake cavity. The gas acceleration ring is fixedly connected to the end of the inner tube. A first gas outlet gap is formed between the inner side of the gas acceleration ring and the welding torch mounting tube, which communicates with the first protective gas channel. A second gas outlet gap is formed between the outer side of the gas acceleration ring and the outer cover, which communicates with the second protective gas channel.

4. The enhanced welding gas protection device according to claim 3, characterized in that, When the welding torch is installed inside the welding torch mounting tube, the torch head, the open end of the outer cover, and the gas acceleration ring are flush.

5. The enhanced welding gas protection device according to claim 4, characterized in that, The welding torch mounting tube is provided with a first threaded hole, and a first bolt is threadedly connected to the first threaded hole; by screwing in the first bolt, the welding torch can be pressed tightly onto the welding torch mounting tube.

6. The enhanced welding gas protection device according to claim 5, characterized in that, The welding torch is provided with a positioning groove that mates with the first bolt.

7. The enhanced welding gas protection device according to claim 1, characterized in that, The outer cover has a plurality of second threaded holes evenly distributed along the circumference, and each second threaded hole is threaded with a second bolt. The end of the second bolt abuts against the outer surface of the inner tube to fix the outer cover.

8. The enhanced welding gas protection device according to claim 1, characterized in that, The inner tube has multiple third threaded holes evenly distributed along the circumference, and each of the third threaded holes is threaded with a third bolt. The end of the third bolt abuts against the outer surface of the welding gun mounting tube, thereby fixing the inner tube.

9. The enhanced welding gas protection device according to claim 3, characterized in that, The gas acceleration ring is fixedly connected to the inner tube by screws.

10. The enhanced welding gas protection device according to claim 3, characterized in that, The gas acceleration ring is welded to the inner tube.

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