A dual flow gas shielded TIG welding torch

Abstract

The application discloses a double-flow-channel gas protection TIG welding gun, and relates to the technical field of welding devices.The welding gun comprises a tungsten electrode structure, a first pipeline structure, a second pipeline structure and a jet pipeline structure arranged in sequence from top to bottom, the first pipeline structure is provided with an outer protective gas inlet, the first pipeline structure is provided with a first outer protective gas channel, the second pipeline structure is provided with an inner protective gas inlet, the second pipeline structure is provided with a second outer protective gas channel and a first inner protective gas channel, the tungsten electrode structure is arranged in the jet pipeline structure, the tungsten electrode structure comprises a mounting seat and a tungsten needle, the jet pipeline structure and the mounting seat are provided with a third outer protective gas channel, the tungsten needle is arranged in the mounting seat, the length direction of the tungsten needle is perpendicular to the length direction of the first pipeline structure, the mounting seat and the tungsten needle are provided with the second inner protective gas channel, and one end of the tungsten needle extends out of the jet pipeline.The welding gun can realize double-gas protection, reduce spatter and form a beautiful weld.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a dual-channel gas-shielded TIG welding torch for welding small-diameter inner ring ends. Background Technology

[0002] TIG welding (Tungsten Inert Gas Welding), also known as non-consumable electrode inert gas welding, is a welding method that uses the heat of an electric arc generated between a tungsten electrode and the workpiece to melt the base material under the protection of an inert gas. During welding, the shielding gas is continuously ejected from the nozzle of the welding torch, forming a protective gas layer around the arc to isolate it from the air and prevent its harmful effects on the tungsten electrode, the molten pool, and the adjacent heat-affected zone, thereby obtaining a high-quality weld.

[0003] Today, higher requirements are placed on the quality of welded joints. Eliminating welding spatter, improving mechanical properties, reducing costs, and increasing economic efficiency are all problems that need to be solved. Currently, most ordinary welding torches are single-pass gas shielded welding, resulting in welded joints with poor mechanical properties, excessive spatter, and uneven weld formation. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-channel gas-shielded TIG welding torch to solve the problems existing in the prior art, achieve dual gas protection, reduce spatter, and produce aesthetically pleasing welds.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a dual-channel gas-shielded TIG welding torch, comprising a tungsten electrode structure and a first pipe structure, a second pipe structure, and a jet pipe structure arranged sequentially from top to bottom. The first pipe structure has an external shielding gas inlet and a first external shielding gas channel. The second pipe structure has an internal shielding gas inlet and a second external shielding gas channel and a first internal shielding gas channel. The tungsten electrode structure is disposed within the jet pipe structure and includes a mounting base and a tungsten needle. A third external shielding gas channel is disposed between the jet pipe structure and the mounting base. The tungsten needle is disposed within the mounting base, and its length direction is perpendicular to the length direction of the first pipe structure. A second internal shielding gas channel is disposed between the mounting base and the tungsten needle, with one end of the tungsten needle extending out of the jet pipe. The external shielding gas inlet, the first external shielding gas channel, the second external shielding gas channel, and the third external shielding gas channel are sequentially connected, as are the internal shielding gas inlet, the first internal shielding gas channel, and the second internal shielding gas channel.

[0007] Preferably, the first pipe structure is provided with a first connector, the first connector including a first hollow screw, the first hollow screw being threadedly connected to the first pipe structure, one end of the first hollow screw being the external protective gas inlet, and the other end of the first hollow screw being connected to the first external protective gas channel.

[0008] Preferably, the first pipe structure and the second pipe structure are connected by a second hollow screw, the second hollow screw is connected to the first pipe structure and the second pipe structure respectively, one end of the second hollow screw is connected to the first external protective gas channel, and the other end of the second hollow screw is connected to the second external protective gas channel.

[0009] Preferably, the second pipe structure is provided with a second connector, the second connector including a third hollow screw, the third hollow screw being threadedly connected to the second pipe structure, one end of the third hollow screw being the inlet of the internal protective gas, and the other end of the third hollow screw being connected to the first internal protective gas channel.

[0010] Preferably, the second pipe structure is provided with a first threaded hole, and the jet pipe structure is provided with a second threaded hole. The connecting bolt passes through the second threaded hole and the first threaded hole in sequence to connect the second pipe structure and the jet pipe structure.

[0011] Preferably, the jet pipe structure is provided with two diversion pipes and a circular hole. There are two third external protective gas channels. The lower ends of the two diversion pipes extend to both sides of the mounting base. The two third external protective gas channels are symmetrically arranged on both sides of the mounting base. One end of each diversion pipe is connected to the second external protective gas channel, and the other end of each diversion pipe is connected to one of the third external protective gas channels. One end of the circular hole is connected to the first internal protective gas channel, and the other end of the circular hole is connected to the second internal protective gas channel.

[0012] Preferably, the surface of the mounting base has a ventilation channel around the axis of the mounting base, the ventilation channel is connected to the first internal protective gas channel, the ventilation channel is connected to the second internal protective gas channel, and the second internal protective gas channel is arranged around the tungsten needle.

[0013] Preferably, a first sealing ring and a second sealing ring are provided between the mounting base and the jet pipe structure, and the first sealing ring and the second sealing ring are respectively located on both sides of the ventilation channel.

[0014] Preferably, the jet pipe structure is provided with a first locking hole, and the mounting base is provided with a second locking hole. The second locking hole corresponds to the first locking hole, and the locking bolt is threadedly connected to the first locking hole and the second locking hole. The locking bolt extends into the first locking hole and the second locking hole in sequence and contacts the tungsten needle to lock the tungsten needle.

[0015] Preferably, it also includes a power supply interface, wherein a screw is provided at the upper end of the first pipe structure, and the power supply interface is sleeved on the screw and fixed by a nut.

[0016] The present invention achieves the following technical effects compared to the prior art:

[0017] The dual-channel gas-shielded TIG welding torch of this invention has a simple structure and is easy to install and disassemble. The length direction of the tungsten needle is perpendicular to the length direction of the first pipe structure, making it suitable for small-diameter inner ring end welding. During operation, external shielding gas is introduced through the external shielding gas inlet, the first external shielding gas channel, the second external shielding gas channel, and the third external shielding gas channel, while internal shielding gas is introduced through the internal shielding gas inlet, the first internal shielding gas channel, and the second internal shielding gas channel. This allows for the introduction of shielding gases of different purities to protect the weld. The torch operates stably, eliminates spatter, and produces aesthetically pleasing welds, ensuring weld quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the dual-channel gas-shielded TIG welding torch of the present invention;

[0020] Figure 2 This is a schematic diagram of the first pipeline structure of the present invention;

[0021] Figure 3 for Figure 2 AA section view;

[0022] Figure 4 for Figure 2 BB section view;

[0023] Figure 5 This is a schematic diagram of the second pipeline structure of the present invention;

[0024] Figure 6 for Figure 5 CC section view;

[0025] Figure 7 This is a bottom view of the second pipe structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the jet pipe structure of the present invention;

[0027] Figure 9 for Figure 8 DD sectional view;

[0028] Figure 10 for Figure 8 EE sectional view;

[0029] Figure 11 This is a bottom view of the jet duct structure of the present invention;

[0030] Figure 12 This is a front view of the tungsten electrode device of the present invention;

[0031] Figure 13 This is a side view of the tungsten electrode device of the present invention;

[0032] Figure 14 for Figure 13 FF sectional view;

[0033] Figure 15 This is a schematic diagram of the jet pipe structure and tungsten electrode device connection of the present invention;

[0034] Figure 16 for Figure 15 GG cross-sectional view;

[0035] The components are: 100 - Dual-channel gas-shielded TIG welding torch; 1 - First pipe structure; 2 - Second pipe structure; 3 - Jet pipe structure; 4 - External shielding gas inlet; 5 - First external shielding gas channel; 6 - Internal shielding gas inlet; 7 - Second external shielding gas channel; 8 - First internal shielding gas channel; 9 - Mounting base; 10 - Tungsten needle; 11 - Third external shielding gas channel; 12 - Second internal shielding gas channel; 13 - First hollow screw; 14 - Second hollow screw; 15 - Third hollow screw; 16 - First threaded hole; 17 - Second threaded hole; 18 - Diverter pipe; 19 - First groove; 20 - Second groove; 21 - Third groove; 22 - Fourth groove; 23 - Fifth groove; 24 - Locking bolt; 25 - Power supply interface; 26 - Screw; 27 - Stepped circular through hole; 28 - Circular hole; 29 - First locking hole; 30 - Connecting bolt; 31 - Connecting hole. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] The purpose of this invention is to provide a dual-channel gas-shielded TIG welding torch to solve the problems existing in the prior art, achieve dual gas protection, reduce spatter, and produce aesthetically pleasing welds.

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] like Figures 1-16 As shown: This embodiment provides a dual-channel gas-shielded TIG welding torch 100, including a tungsten electrode structure and a first pipe structure 1, a second pipe structure 2, and a jet pipe structure 3 arranged sequentially from top to bottom. The first pipe structure 1 is provided with an external shielding gas inlet 4 and a first external shielding gas channel 5. The second pipe structure 2 is provided with an internal shielding gas inlet 6, a second external shielding gas channel 7, and a first internal shielding gas channel 8. The tungsten electrode structure includes a mounting base 9 and a tungsten needle 10, with the tungsten needle 10 disposed in the mounting base 9. The tungsten electrode structure is disposed in the jet pipe structure 3. Inside the stepped circular through-hole 27, a third external protective gas channel 11 is formed between the jet pipe structure 3 and the mounting base 9. The length direction of the tungsten needle 10 is perpendicular to the length direction of the first pipe structure 1, that is, the arc is emitted laterally, which is suitable for inner ring end welding. A second internal protective gas channel 12 is provided between the mounting base 9 and the tungsten needle 10. One end of the tungsten needle 10 extends out of the jet pipe. The external protective gas inlet 4, the first external protective gas channel 5, the second external protective gas channel 7 and the third external protective gas channel 11 are connected in sequence. The internal protective gas inlet 6, the first internal protective gas channel 8 and the second internal protective gas channel 12 are connected in sequence.

[0040] In this embodiment, a screw 26 is provided at the upper end of the first pipe structure 1, and the access electrode of the power terminal interface 25 is sleeved on the screw 26 and fixed by a nut. A gasket is provided between the nut and the power terminal interface 25.

[0041] In this embodiment, the first pipe structure 1 is provided with a first connector, which includes a first hollow screw 13. The first hollow screw 13 is threadedly connected to the threaded hole of the first pipe structure 1. One end of the first hollow screw 13 is an external protective gas inlet 4. One end of the first hollow screw 13 is connected to an external source through a nut. When connecting, Teflon tape is wrapped around it to ensure that the gas will not leak out. The other end of the first hollow screw 13 is connected to the first external protective gas channel 5, and the first hollow screw 13 and the first external protective gas channel 5 are arranged perpendicularly.

[0042] In this embodiment, the first pipe structure 1 and the second pipe structure 2 are connected by a second hollow screw 14. The second hollow screw 14 is fixedly connected to the first pipe structure 1 and threadedly connected to the threaded hole of the second pipe structure 2. One end of the second hollow screw 14 is connected to the first external protective gas channel 5, and the other end of the second hollow screw 14 is connected to the second external protective gas channel 7.

[0043] In this embodiment, a Z-shaped groove is formed on the second pipe structure 2. The second pipe structure 2 is provided with a second connector. The second connector includes a third hollow screw 15. The third hollow screw 15 is threadedly connected to the threaded hole at the groove. One end of the third hollow screw 15 is the inner protective gas inlet 6, and the other end of the third hollow screw 15 is connected to the first inner protective gas channel 8.

[0044] In this embodiment, the second pipe structure 2 is provided with two first threaded holes 16, and the jet pipe structure 3 is provided with two second threaded holes 17. The connecting bolt 30 passes through a second threaded hole 17 and a corresponding first threaded hole 16 in sequence to connect the second pipe structure 2 and the jet pipe structure 3.

[0045] In this embodiment, the jet pipe structure 3 is shaped like a cylinder with its two sides symmetrically cut off to form a regular column. The axis of the stepped circular through hole 27 is perpendicular to the cut surface, allowing the interior of the jet pipe structure 3 to communicate with the exterior. The upper surface of the jet pipe structure 3 has an arc-shaped groove and a circular groove. Rubber sealing rings are placed inside the arc-shaped groove and the circular groove. Two vertically arranged diversion pipes 18 are opened downward at the bottom of the arc-shaped groove. The lower ends of the two diversion pipes 18 extend to both sides of the mounting base 9. Two third external protective gas channels 11 are symmetrically arranged on both sides of the mounting base 9. One end of each diversion pipe 18 is connected to the second external protective gas channel 7, and the other end of each diversion pipe 18 is connected to a third external protective gas channel 11 formed by the stepped circular through hole 27. The two diversion pipes 18 and the two third external protective gas channels 11 allow the external protective gas to enter both sides of the tungsten electrode evenly, protecting the tungsten needle 10 during welding and improving the welding quality. A circular hole 28 is concentrically formed at the bottom of the circular groove. One end of the circular hole 28 is connected to the first internal protective gas channel 8, and the other end of the circular hole 28 is connected to the stepped circular through hole 27. The rubber sealing rings inside the arc-shaped groove and the circular groove are used to prevent gas leakage and foreign objects from entering when the second pipe structure 2 and the jet pipe structure 3 are connected.

[0046] In this embodiment, the shape of the outer surface of the mounting base 9 matches the stepped circular through hole 27 of the jet pipe structure 3. This is used to position the tungsten electrode device during installation, preventing welding quality problems caused by over-assembly of the tungsten electrode device and the jet pipe structure 3, which would prevent the inner and outer protective gases from entering smoothly. The outer surface of the mounting base 9 is provided with a first groove 19, a second groove 20, a third groove 21, a fourth groove 22, and a fifth groove 23 in sequence from the tip of the tungsten needle 10 to the tail of the tungsten needle 10. The first groove 19 is connected to the diversion pipe 18 and the third external protective gas channel 11; the second groove 20 is used to place the first sealing ring; the third groove 21 forms a ventilation channel, which is connected to the first internal protective gas channel 8. The bottom surface of the third groove 21 is provided with a connecting hole 31 perpendicular to the length direction of the tungsten needle 10. The connecting hole 31 is located below the tungsten needle 10. The ventilation channel is connected to the second internal protective gas channel 12 through the connecting hole 31. The second internal protective gas channel 12 is arranged around the tungsten needle 10. The position of the connecting hole 31 allows the internal protective gas to enter slowly, avoiding excessive airflow impact that could cause arc breakage during welding; the fourth groove 22 corresponds to the first locking hole 29 of the jet pipe structure 3. The locking bolt 24 is threadedly connected to the first locking hole 29. After the mounting base 9 is placed into the jet pipe structure 3, the locking bolt 24 extends into the first locking hole 29 and the second locking hole at the bottom of the fourth groove 22 in sequence to lock and fix the tungsten needle 10, preventing it from moving during welding; the fifth groove 23 is used to place the second sealing ring. The first and second sealing rings are both disposed between the mounting base 9 and the jet pipe structure 3. The first and second sealing rings are located on both sides of the ventilation channel to prevent the internal protective gas from escaping.

[0047] This embodiment has a compact design. The diameter of the first pipe structure 1 is 19mm, the diameter of the second pipe structure 2 is 25mm, and the distance between the end face of the tungsten needle 10 protruding from the jet pipe structure 3 and the opposite end face is 19.3mm. The overall size of this embodiment is small, and welding can be carried out in a space with a small inner diameter.

[0048] The dual-channel gas-shielded TIG welding torch 100 of this embodiment has a simple structure, is easy to install and disassemble, and is suitable for small-diameter inner ring end welding. During operation, shielding gases of different purities can be introduced to protect the weld. The shielding gas is stable, which keeps the arc stable and has good arc following, achieving no spatter and making the weld formation beautiful, thus ensuring weld quality. During use, it is only necessary to remove the mounting base 9 that holds the tungsten needle 10 to replace the tungsten needle 10. After replacing the tungsten needle 10, the mounting base 9 is placed into the stepped circular through hole 27 and finally fixed with the locking bolt 24. The clamping is convenient, the installation accuracy requirement is low, and welding problems are reduced during use.

[0049] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A dual-channel gas-shielded TIG welding torch, characterized in that: The device includes a tungsten electrode structure and a first pipe structure, a second pipe structure, and a jet pipe structure arranged sequentially from top to bottom. The first pipe structure has an external protective gas inlet and a first external protective gas channel. The second pipe structure has an internal protective gas inlet and a second external protective gas channel and a first internal protective gas channel. The tungsten electrode structure is disposed within the jet pipe structure. The tungsten electrode structure includes a mounting base and a tungsten needle. A third external protective gas channel is provided between the jet pipe structure and the mounting base. The tungsten needle is disposed within the mounting base, and its length direction is perpendicular to the length direction of the first pipe structure. A second internal protective gas channel is provided between the mounting base and the tungsten needle, with one end of the tungsten needle extending out of the jet pipe structure. The external protective gas inlet, the first external protective gas channel, the second external protective gas channel, and the third external protective gas channel are sequentially connected. The internal protective gas inlet, the first internal protective gas channel, and the second internal protective gas channel are also sequentially connected. The jet pipe structure is provided with two diversion pipes and a circular hole. There are two third external protective gas channels. The lower ends of the two diversion pipes extend to both sides of the mounting base. The two third external protective gas channels are symmetrically arranged on both sides of the mounting base. One end of each diversion pipe is connected to the second external protective gas channel, and the other end of each diversion pipe is connected to one of the third external protective gas channels. One end of the circular hole is connected to the first internal protective gas channel, and the other end of the circular hole is connected to the second internal protective gas channel. The surface of the mounting base is provided with a ventilation channel around the axis of the mounting base. The ventilation channel is connected to the first internal protective gas channel and the second internal protective gas channel. The second internal protective gas channel is arranged around the tungsten needle. A first sealing ring and a second sealing ring are provided between the mounting base and the jet pipe structure, and the first sealing ring and the second sealing ring are respectively located on both sides of the ventilation channel; The jet pipe structure is provided with a first locking hole, and the mounting base is provided with a second locking hole. The second locking hole corresponds to the first locking hole. The locking bolt is threadedly connected to the first locking hole and the second locking hole. The locking bolt extends into the first locking hole and the second locking hole in sequence and contacts the tungsten needle to lock the tungsten needle. The outer surface of the mounting base is provided with a first groove, a second groove, a third groove, a fourth groove, and a fifth groove sequentially from the tip of the tungsten needle to the tail of the tungsten needle. The first groove is used to communicate with the diversion pipe and the third external protective gas channel. The second groove is used to place the first sealing ring. The third groove forms the ventilation channel, and a connecting hole is provided on the bottom surface of the third groove perpendicular to the length direction of the tungsten needle. The connecting hole is located below the tungsten needle, and the ventilation channel communicates with the second internal protective gas channel through the connecting hole. The bottom of the fourth groove is provided with the second locking hole. The fifth groove is used to place the second sealing ring.

2. The dual-channel gas-shielded TIG welding torch according to claim 1, characterized in that: The first pipeline structure is provided with a first joint, the first joint including a first hollow screw, the first hollow screw being threadedly connected to the first pipeline structure, one end of the first hollow screw being the external protective gas inlet, and the other end of the first hollow screw being connected to the first external protective gas channel.

3. The dual-channel gas-shielded TIG welding torch according to claim 1, characterized in that: The first pipe structure and the second pipe structure are connected by a second hollow screw. The second hollow screw is connected to both the first pipe structure and the second pipe structure. One end of the second hollow screw is connected to the first external protective gas channel, and the other end of the second hollow screw is connected to the second external protective gas channel.

4. The dual-channel gas-shielded TIG welding torch according to claim 1, characterized in that: The second pipeline structure is provided with a second connector, which includes a third hollow screw. The third hollow screw is threadedly connected to the second pipeline structure. One end of the third hollow screw is the inlet of the internal protective gas, and the other end of the third hollow screw is connected to the first internal protective gas channel.

5. The dual-channel gas-shielded TIG welding torch according to claim 1, characterized in that: The second pipe structure is provided with a first threaded hole, and the jet pipe structure is provided with a second threaded hole. The connecting bolt passes through the second threaded hole and the first threaded hole in sequence to connect the second pipe structure and the jet pipe structure.

6. The dual-channel gas-shielded TIG welding torch according to claim 1, characterized in that: It also includes a power supply interface. A screw is provided at the upper end of the first pipe structure, and the power supply interface is sleeved on the screw and fixed by a nut.

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