An integrated dual tungsten electrode torch for TIG welding

Abstract

The application provides an integrated double-tungsten electrode welding torch for TIG welding, which comprises a fixing plate, a wire feeding device and a double-tungsten electrode welding torch arranged on the fixing plate, the wire feeding device comprises a wire feeding nozzle which can move in three-dimensional space and is used for feeding a welding wire to the double-tungsten electrode welding torch, and the double-tungsten electrode welding torch comprises a rotatable first tungsten electrode and a rotatable second tungsten electrode, and the relative positions of the first tungsten electrode and the second tungsten electrode close to one end of the welding wire can be adjusted. The integrated double-tungsten electrode welding torch for TIG welding can quickly adjust the relative positions of the first tungsten electrode and the second tungsten electrode according to needs to meet the welding requirements of different working conditions, especially the welding requirements of super-thick and narrow-interval titanium alloy, and the position and posture of the integrated double-tungsten electrode welding torch can be adjusted according to the size of the welding plate, so that the adaptability is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of TIG welding, in particular to an integrated double-tungsten electrode welding torch for TIG welding. BACKGROUND

[0002] Titanium alloy plate and pipe have the advantages of high specific strength, corrosion resistance, good weldability, small density, etc., and have been widely used in various fields such as aviation, aerospace, ocean, chemical industry, biology, etc. The welding of super-thick narrow-gap titanium alloy plate is one of the process cores of deep submersible pressure equipment, and the welding quality can affect the final product quality.

[0003] The existing tungsten inert gas arc welding (TIG welding) is a high-quality but low-efficiency welding method, which has the characteristics of stable welding process and excellent welding quality, and is suitable for precision welding and high-quality welding. However, it also has obvious limitations, i.e. slow welding speed and shallow penetration. Double-tungsten electrode TIG welding obtains an elliptical arc between the two tungsten electrodes, which is beneficial to narrow-gap welding and can solve the side wall un-melted defect that is prone to occur during narrow-gap TIG welding. At a larger welding current, it can maintain a relatively low arc pressure, reduce the welding penetration, and significantly improve the welding coverage rate. It is currently the main welding method for thick titanium alloys.

[0004] Therefore, the Chinese patent with application number CN201911125280.8 discloses a double-tungsten electrode welding gun body and device with a full-cooling structure, which includes three cooling water passages and two gas cooling passages inside the gun body to meet the cooling requirements during high-current welding. However, the internal structure of the welding gun in this scheme is complex, the tungsten electrode spacing is not easy to adjust, and the volume is large. The Chinese patent with application number CN202220401851.7 discloses a liquid-cooled double-tungsten electrode welding torch, in which the two tungsten electrodes are fixed by tungsten electrode clamps of the respective tungsten electrode guns. However, this scheme has the disadvantages of inconvenient spacing adjustment, large volume, and poor air tightness. The above-mentioned schemes cannot meet the requirements for adjusting the length and spacing of deep narrow-gap tungsten electrodes during the welding of super-thick narrow-gap titanium alloy plates.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] The problem solved by the present application is that the existing double-tungsten electrode welding gun structure is unreasonable and cannot adjust the length and spacing of deep narrow-gap tungsten electrodes during the welding of super-thick narrow-gap titanium alloy plates.

[0007] In order to solve the above problems, the application provides an integrated double-tungsten electrode welding torch for TIG welding, comprising a fixed plate, a wire feeder and a double-tungsten electrode welding torch arranged on the fixed plate, the wire feeder comprising a wire feeder nozzle movable in three-dimensional space, used for feeding welding wire to the double-tungsten electrode welding torch; the double-tungsten electrode welding torch comprising a rotatable first tungsten electrode and a second tungsten electrode, the relative positions of the first tungsten electrode and the second tungsten electrode near one end of the welding wire being adjustable.

[0008] The setting structure is simple and can meet the welding requirements of super-thick narrow-gap titanium alloy.

[0009] Preferably, the double-tungsten electrode welding torch comprises a first cavity and a second cavity, both of which are semicircular in cross section and internally provided with cooling structures and air inlet structures, an insulating layer is arranged between the first cavity and the second cavity, a first through hole is arranged in the first cavity for placing the first tungsten electrode, a second through hole is arranged in the second cavity for placing the second tungsten electrode, and the relative positions of the first tungsten electrode and the second tungsten electrode near one end of the welding wire in a first direction and a second direction are adjustable.

[0010] This setting can greatly reduce the space occupation area and the cost of the double-tungsten electrode welding torch. Preferably, the first cavity and the second cavity are of the same structure and are made of red copper, and the insulating layer is made of ceramic.

[0011] Preferably, a first fixing bolt is arranged on the side of the first through hole away from the insulating layer, the first fixing bolt being used for fixing the first tungsten electrode, and a second fixing bolt is arranged on the side of the second through hole away from the insulating layer, the second fixing bolt being used for fixing the second tungsten electrode. This setting can adjust the first tungsten electrode and the second tungsten electrode to stretch up and down and rotate horizontally through bolts, the up-and-down adjustment range being 0-60mm, the front-and-back adjustment range being 0-20mm, and the titanium alloy super-thick plate welding with a maximum thickness of 110mm being realized, the installation and dismounting being convenient and the operation being simple.

[0012] Preferably, a nozzle of a "flat" type is arranged at one end of the first cavity, the first tungsten electrode is partially arranged in the nozzle, and a first power supply connecting hole is arranged at the end of the first cavity away from the nozzle, used for connecting a welding machine power supply.

[0013] This setting can adjust the relative positions of the double tungsten electrodes as needed, while making the thickness of the nozzle as small as possible to meet the requirements of deep narrow-gap welding.

[0014] Preferably, the gas inlet structure comprises a first gas pipe and a second gas pipe located on both sides of the insulation layer, the gas outlet ends of the first gas pipe and the second gas pipe are connected with the nozzle, the first gas pipe is provided with a first gas net arranged horizontally, and the second gas pipe is provided with a second gas net arranged horizontally.

[0015] The arrangement disperses the protective gas through the first gas net and the second gas net, avoids the influence of the concentrated gas on the arc stability, sends the protective gas into the nozzle and cools the first tungsten electrode and the second tungsten electrode, adjusts the gas proportion according to the gas flow and the welding pulse amplitude, improves the stability of the titanium alloy narrow-gap welding process, and saves the gas usage amount to reduce the use cost.

[0016] Preferably, the cooling structure comprises a first water inlet pipe and a first water outlet pipe connected with each other and a second water inlet pipe and a second water outlet pipe connected with each other, the first water inlet pipe and the first water outlet pipe are located in the first cavity, and the second water inlet pipe and the second water outlet pipe are located in the second cavity. The arrangement can form a water flow loop in the conductive cavity for taking away the heat of the welding torch during the welding process.

[0017] Preferably, the wire feeding device comprises:

[0018] The up-down adjusting nut is arranged on the fixed plate and used for adjusting the position of the wire feeding nozzle in the vertical direction.

[0019] The left-right adjusting nut is arranged on the up-down adjusting nut and used for adjusting the position of the wire feeding nozzle in the horizontal direction.

[0020] The angle adjusting nut is arranged on the left-right adjusting nut and used for adjusting the inclination angle of the wire feeding nozzle.

[0021] The lengthened wire feeding pipe is arranged on the angle adjusting nut and connected with the inlet end of the wire feeding nozzle, the inlet end of the lengthened wire feeding pipe is provided with a wire feeding hose interface, and the wire feeding hose interface is used for feeding the external hot wire or vibrating welding wire to the wire feeding nozzle.

[0022] The arrangement can ensure that the distance between the welding wire and the double-tungsten-arc molten pool is within a suitable range, and the front end of the wire feeding gun can be deeply inserted into the narrow gap, thereby meeting the welding requirements of the ultra-thick narrow gap.

[0023] Preferably, the fixed plate is provided with a sliding assembly, and the wire feeding device can slide along the sliding assembly and is fixedly connected with the sliding assembly through a fixed block. The arrangement can realize the large-distance adjustment and control of the wire feeding device in the left-right direction and the front-rear direction, has a simple structure, and is convenient for production and processing.

[0024] Preferably, the integrated double-tungsten torch for TIG welding further comprises a CCD camera, the fixed plate is provided with a fixing assembly for fixing the CCD camera, and the fixing assembly is located on one side of the sliding assembly. By arranging the CCD camera, the welding scene of the ultra-thick narrow gap can be sampled, and the welding precision and efficiency are improved.

[0025] Preferably, the fixed plate is provided with a first sliding groove located on the side of the sliding assembly away from the fixed assembly, and the double-tungsten torch is fixed in the first sliding groove by bolts. This arrangement can adjust the relative position of the double-tungsten torch relative to the fixed plate, and has a wide application range.

[0026] Compared with the prior art, the integrated double-tungsten torch for TIG welding has the following beneficial effects: 1) the relative position of the first tungsten electrode and the second tungsten electrode can be quickly adjusted according to needs to meet the welding requirements of different working conditions, especially the welding of ultra-thick narrow gap titanium alloy; 2) the position and posture of the integrated double-tungsten torch can be adjusted according to the size of the welding plate, and the adaptability is strong; 3) by arranging the gas net, the protective gas can be dispersed, and the concentration of the gas is avoided to affect the stability of the arc; at the same time, the first tungsten electrode and the second tungsten electrode are cooled by the protective gas. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a schematic diagram of the integrated double-tungsten torch for TIG welding according to an embodiment of the present application;

[0028] Figure 2 FIG. 2 is a front view of the double-tungsten torch according to an embodiment of the present application;

[0029] Figure 3 FIG. 3 is a side view of the double-tungsten torch according to an embodiment of the present application;

[0030] Figure 4 FIG. 4 is a top view of the double-tungsten torch according to an embodiment of the present application;

[0031] Figure 5 FIG. 5 is a structural schematic diagram of the first tungsten electrode according to an embodiment of the present application;

[0032] Figure 6 FIG. 6 is a process schematic diagram of adjusting the distance between the double tungsten electrodes according to an embodiment of the present application.

[0033] REFERENCE SIGNS:

[0034] 1 - double tungsten electrode welding torch; 101 - first water inlet pipe; 102 - first water outlet pipe; 103 - second water inlet pipe; 104 - second water outlet pipe; 105 - first perforation; 106 - second perforation; 107 - first gas network; 108 - second gas network; 109 - insulation layer; 110 - first gas pipe; 111 - second gas pipe; 112 - first power supply connection hole; 113 - second power supply connection hole; 114 - fixing strap; 115 - first fixing bolt; 116 - first cavity; 117 - second cavity; 118 - second fixing bolt; 119 - housing; 120 - nozzle; 121 - first tungsten electrode; 1211 - first tungsten electrode segment; 1212 - second tungsten electrode segment; 1213 - third tungsten electrode segment; 122 - second tungsten electrode;

[0035] 2 - wire feeder; 201 - up and down adjusting nut; 202 - left and right adjusting nut; 203 - wire feeder hose interface; 204 - angle adjusting nut; 205 - lengthened wire feeder pipe; 206 - wire feeder nozzle; 207 - welding wire; 208 - fixing block;

[0036] 3 - fixing plate; 301 - sliding assembly; 302 - fixing assembly; 303 - first sliding groove; 304 - second sliding groove. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0038] As Figure 1 described, an integrated double tungsten electrode welding torch for TIG welding comprises a fixing plate 3, a wire feeder 2 and a double tungsten electrode welding torch 1 are arranged on the fixing plate 3, the wire feeder 2 comprises a wire feeder nozzle 206 which can move in three-dimensional space, for feeding welding wire 207 to the double tungsten electrode welding torch 1; the double tungsten electrode welding torch 1 comprises a first tungsten electrode 121 and a second tungsten electrode 122 which are arranged rotatably, and the relative positions of the first tungsten electrode 121 and the second tungsten electrode 122 near one end of the welding wire 207 are adjustable.

[0039] The arrangement can make the structure of the welding torch reasonable, and meet the welding requirements of super-thick narrow-gap titanium alloy. Preferably, the fixing plate 3 is a bakelite plate, which can ensure insulation between each other and is safer.

[0040] As Figures 2-6As shown, the double tungsten electrode welding torch 1 comprises a first cavity 116 and a second cavity 117, which are semicircular in cross section and internally provided with cooling structures and air inlet structures, and an insulation layer 109 is arranged between the first cavity 116 and the second cavity 117, a first through hole 105 is arranged in the first cavity 116 for placing a first tungsten electrode 121, and a second through hole 106 is arranged in the second cavity 117 for placing a second tungsten electrode 122, and the relative positions of the first tungsten electrode 121 and the second tungsten electrode 122 in the first direction and the second direction near one end of the welding wire 207 are adjustable.

[0041] The first cavity 116 and the second cavity 117 are combined to replace two welding torches, which greatly reduces the space occupation area and the cost of the double tungsten electrode welding torch 1. Preferably, the first cavity 116 and the second cavity 117 are of the same structure and are made of red copper, and the insulation layer 109 is made of ceramic.

[0042] Preferably, the first tungsten electrode 121 comprises a first tungsten electrode segment 1211, a second tungsten electrode segment 1212 and a third tungsten electrode segment 1213 which are sequentially connected and in the same plane, the second tungsten electrode segment 1212 is perpendicular to the first tungsten electrode segment 1211 and the third tungsten electrode segment 1213, one side of the third tungsten electrode segment 1213 is provided with a first inclined surface, and the first tungsten electrode segment 1211 is located in the first through hole 105. This arrangement can adjust the relative position of the first tungsten electrode 121 and the second tungsten electrode 122 by rotating the first tungsten electrode 121, thereby meeting the welding requirements of different working conditions, especially the welding of ultra-thick narrow-gap titanium alloy. Preferably, the structure of the second tungsten electrode 122 is the same as that of the first tungsten electrode 121, which will not be described here.

[0043] As an example of the present application, a first fixed bolt 115 abutting against the first tungsten electrode 121 is arranged on the side of the first through hole 105 away from the insulation layer 109, and a second fixed bolt 118 abutting against the second tungsten electrode 122 is arranged on the side of the second through hole 106 away from the insulation layer 109. This arrangement can adjust the first tungsten electrode 121 and the second tungsten electrode 122 up and down and horizontally rotate by bolts, the up and down can be adjusted within the range of 0-60mm, and the front and rear distance can be adjusted within the range of 0-20mm by the adjustment mode as shown, Figure 6 which can realize the welding of titanium alloy ultra-thick plates with a maximum thickness of 110mm, and the installation and disassembly are convenient and simple to operate.

[0044] Preferably, the first fixed bolt 115 and the second fixed bolt 118 are symmetrically arranged on the left and right sides of the insulation layer 109. This arrangement is simple in structure and beautiful in appearance.

[0045] As an example of the present application, the first cavity 116 and the second cavity 117 are connected by the fixed cable tie 114, and the periphery of the first cavity 116 and the second cavity 117 is provided with the shell 119. This arrangement can be isolated and protected to avoid the connection between the two cavities due to the operation error in the welding process.

[0046] Preferably, the first cavity 116 is provided with a "flat" nozzle 120 at one end, and the third tungsten electrode segment 1213 partially extends out of the nozzle 120. The first power supply connection hole 112 is arranged at the end of the first cavity 116 away from the nozzle 120 for connecting the welding machine power supply. This arrangement can adjust the relative position between the two tungsten electrodes as needed, while making the thickness of the nozzle 120 as small as possible to meet the needs of deep and narrow gap welding. As an example of the present application, the length of the second tungsten electrode segment 1212 is L1, and the thickness and width of the nozzle 120 are L2 and L3 respectively, where L1 < L2 and L3 > 2*L1. Similarly, the second power supply connection hole 113 is arranged at one end of the second cavity 117 for connecting the welding machine power supply.

[0047] As an example of the present application, the gas inlet structure includes the first gas pipe 110 and the second gas pipe 111 located on both sides of the insulating layer 109. The gas outlet ends of the first gas pipe 110 and the second gas pipe 111 are connected to the nozzle 120. The first gas net 107 is arranged horizontally in the first gas pipe 110, and the second gas net 108 is arranged horizontally in the second gas pipe 111. This arrangement disperses the shielding gas through the first gas net 107 and the second gas net 108 to avoid the concentration of the gas affecting the stability of the arc. At the same time, the shielding gas is sent into the nozzle 120 and the first tungsten electrode 121 and the second tungsten electrode 122 for cooling. According to the gas flow and the welding pulse amplitude, the gas proportion is adjusted to improve the stability of the titanium alloy narrow gap welding process while saving the amount of gas used to reduce the use cost.

[0048] The first gas pipe 110 and the second gas pipe 111 can pass the same or different shielding gas, such as helium or argon. Preferably, the integrated double-tungsten electrode welding torch for TIG welding further includes a gas controller connected to the first gas pipe 110 and the second gas pipe 111 respectively, which can realize the proportional mixing of helium and argon gas. The pulse control regulator can also be linked with the gas controller to pass argon and helium in sequence according to the high and low of the pulse amplitude to improve the stability of the welding pool.

[0049] As an example of the present application, the first gas pipe 110 is connected to pure argon gas, and the second gas pipe 111 is connected to pure helium gas. By adjusting the gas flow of the two pipes, argon-helium mixed gas with different mixing ratios can be obtained. Under the protection of argon-helium mixed gas with different mixing ratios, the arc and the molten pool can exhibit different characteristics, and different mixing ratios can be selected according to the welding characteristics of the workpiece.

[0050] By adjusting the gas controller to alternately output pure argon gas and pure helium gas, and adjusting the pulse frequency of the double-tungsten electrode welding machine to match the gas control, helium gas is output during high pulse, and argon gas is output during low pulse. In this way, the arc energy is higher during high pulse, which helps to reduce the side wall unmelting, and the welding deposition efficiency is greatly improved.

[0051] As an example of the present application, the first gas net 107 or the second gas net 108 uses a 60-mesh brass net with a wire diameter of 0.09 mm, stacked 4-5 layers. Specifically, the brass net is cut to the size of the inner diameter of the first gas pipe 110 and the second gas pipe 111, and is pushed into the first gas pipe 110 and the second gas pipe 111 about 10 mm deep from the lower end. This setting can make the gas output uniform, concentrated and stable to better protect the molten pool.

[0052] As an example of the present application, the cooling structure includes a first water inlet pipe 101, a first water outlet pipe 102 connected thereto, and a second water inlet pipe 103, a second water outlet pipe 104 connected thereto. The first water inlet pipe 101 and the first water outlet pipe 102 are located in the first cavity 116, and the second water inlet pipe 103 and the second water outlet pipe 104 are located in the first cavity 116. This setting can form a water flow loop in the conductive cavity for carrying away the heat of the welding torch during welding.

[0053] As an example of the present application, the wire feeding device 2 includes:

[0054] The up-down adjusting nut 201 is arranged on the fixed plate 3 and is used to adjust the position of the wire feeding nozzle 206 in the vertical direction;

[0055] The left-right adjusting nut 202 is arranged on the up-down adjusting nut 201 and is used to adjust the position of the wire feeding nozzle 206 in the horizontal direction;

[0056] The angle adjusting nut 204 is arranged on the left-right adjusting nut 202 and is used to adjust the inclination angle of the wire feeding nozzle 206;

[0057] The lengthened wire feeding pipe 205 is arranged on the angle adjusting nut 204 and is connected to the inlet end of the wire feeding nozzle 206. The inlet end of the lengthened wire feeding pipe 205 is provided with a wire feeding hose interface 203, which is used to feed the external hot wire or vibrating welding wire 207 to the wire feeding nozzle 206.

[0058] The connection and assembly relationship of the up and down adjusting nut 201, the left and right adjusting nut 202, the angle adjusting nut 204 and the lengthened wire feeding pipe 205 are prior art, which will not be described here. As an example of the present application, the angle adjusting nut 204 can adjust the wire feeding nozzle 206 within the range of 15°-45°, ensuring that the distance between the welding wire 207 and the double-tungsten electrode arc pool is within the appropriate range; the lengthened wire feeding pipe 205 is a lengthened thin copper pipe with a diameter of 6 mm to ensure that the front end of the wire feeding gun can be deep into the narrow gap.

[0059] As an example of the present application, the fixed plate 3 is provided with a sliding assembly 301, and the wire feeding device 2 can slide along the sliding assembly 301 and is fixedly connected with the sliding assembly 301 through the fixed block 208. Preferably, the sliding assembly 301 is L-shaped, which can realize the large-distance adjustment of the wire feeding device 2 in the left, right, front and back directions, and has a simple structure and is convenient for production and processing.

[0060] Preferably, the integrated double-tungsten electrode welding torch for TIG welding further comprises a CCD camera, the fixed plate 3 is provided with a fixed assembly 302 for fixing the CCD camera, and the fixed assembly 302 is located on one side of the sliding assembly 301. By arranging the CCD camera, the welding scene of the ultra-thick narrow gap can be sampled, and the welding precision and efficiency are improved. The specific structures of the sliding assembly 301, the fixed block 208 and the fixed assembly 302 are prior art, which will not be described here.

[0061] As an example of the present application, the fixed plate 3 is provided with a first sliding groove 303, the first sliding groove 303 is located on the side of the sliding assembly 301 away from the fixed assembly 302, and the double-tungsten electrode welding gun 1 is fixed in the first sliding groove 303 through bolts. This arrangement can adjust the relative position of the double-tungsten electrode welding gun 1 relative to the fixed plate 3, and has a wide application range. Preferably, the integrated double-tungsten electrode welding torch for TIG welding further comprises a welding carriage (not shown in the figure), the fixed plate 3 is provided with a second sliding groove 304, the second sliding groove 304 and the first sliding groove 303 are respectively located on the two sides of the fixed plate 3, and the second sliding groove 304 is slidably arranged on the welding carriage. This arrangement has a simple structure and is convenient for adjusting the position and posture of the integrated double-tungsten electrode welding torch according to the size of the welding plate, and has strong adaptability.

[0062] Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and therefore the protection scope of the present application should be subject to the range defined by the claims.

Claims

1. An integrated double tungsten electrode torch for TIG welding, comprising a fixing plate (3), characterized in that, The fixed plate (3) is provided with a wire feeding device (2) and a double tungsten electrode welding gun (1), the wire feeding device (2) comprises a wire feeding nozzle (206) which can move in three-dimensional space, used for conveying a welding wire (207) to the double tungsten electrode welding gun (1); the double tungsten electrode welding gun (1) comprises a rotatable first tungsten electrode (121) and a second tungsten electrode (122), the relative positions of the first tungsten electrode (121) and the second tungsten electrode (122) near one end of the welding wire (207) are adjustable; The double tungsten electrode welding gun (1) comprises a first cavity (116) and a second cavity (117) which are semicircular in cross section and internally provided with cooling structures and air inlet structures, an insulation layer (109) is arranged between the first cavity (116) and the second cavity (117), a first through hole (105) is arranged in the first cavity (116) for placing the first tungsten electrode (121), a second through hole (106) is arranged in the second cavity (117) for placing the second tungsten electrode (122), and the relative positions of the first tungsten electrode (121) and the second tungsten electrode (122) near one end of the welding wire (207) in a first direction and a second direction are adjustable; A first fixing bolt (115) is arranged on the side of the first through hole (105) away from the insulation layer (109), the first fixing bolt (115) is used for fixing the first tungsten electrode (121), and a second fixing bolt (118) is arranged on the side of the second through hole (106) away from the insulation layer (109), the second fixing bolt (118) is used for fixing the second tungsten electrode (122); A "flat" nozzle (120) is arranged at one end of the first cavity (116), part of the first tungsten electrode (121) is arranged to extend into the nozzle (120), and a first power supply connecting hole (112) is arranged at the end of the first cavity (116) away from the nozzle (120) and used for connecting a welding machine power supply; The first tungsten electrode (121) comprises a first tungsten electrode segment (1211), a second tungsten electrode segment (1212) and a third tungsten electrode segment (1213) which are sequentially connected and located in the same plane, the second tungsten electrode segment (1212) is perpendicular to the first tungsten electrode segment (1211) and the third tungsten electrode segment (1213), one side of the third tungsten electrode segment (1213) is provided with a first inclined surface, the first tungsten electrode segment (1211) is located in the first through hole (105), and the structure of the second tungsten electrode (122) is the same as that of the first tungsten electrode (121).

2. The integrated dual tungsten electrode torch for TIG welding of claim 1, wherein, The air inlet structure comprises a first air pipe (110) and a second air pipe (111) located on both sides of the insulation layer (109), the air outlet ends of the first air pipe (110) and the second air pipe (111) are connected with the nozzle (120), a first air net (107) is arranged horizontally in the first air pipe (110), and a second air net (108) is arranged horizontally in the second air pipe (111).

3. The integrated dual tungsten electrode torch for TIG welding of claim 1, wherein, The cooling structure comprises a first water inlet pipe (101) and a first water outlet pipe (102) connected to each other, and a second water inlet pipe (103) and a second water outlet pipe (104) connected to each other, wherein the first water inlet pipe (101) and the first water outlet pipe (102) are located in the first cavity (116), and the second water inlet pipe (103) and the second water outlet pipe (104) are located in the second cavity (117).

4. The integrated dual tungsten electrode torch for TIG welding of claim 1, wherein, The wire feeding device (2) comprises: an up-down adjusting nut (201) arranged on the fixed plate (3) and used for adjusting the position of the wire feeding nozzle (206) in the vertical direction; a left-right adjusting nut (202) arranged on the up-down adjusting nut (201) and used for adjusting the position of the wire feeding nozzle (206) in the horizontal direction; an angle adjusting nut (204) arranged on the left-right adjusting nut (202) and used for adjusting the inclination angle of the wire feeding nozzle (206); and an extended wire feeding pipe (205) arranged on the angle adjusting nut (204) and connected to the inlet end of the wire feeding nozzle (206), wherein the inlet end of the extended wire feeding pipe (205) is provided with a wire feeding hose interface (203) for feeding the externally connected hot wire or vibrating welding wire (207) to the wire feeding nozzle (206).

5. The integrated dual tungsten electrode torch for TIG welding of claim 4, wherein, The fixed plate (3) is provided with a sliding assembly (301), and the wire feeding device (2) can slide along the sliding assembly (301) and is fixedly connected to the sliding assembly (301) through a fixing block (208).

6. The integrated dual tungsten electrode torch for TIG welding of claim 5, wherein, The integrated double-tungsten electrode welding torch for TIG welding further comprises a CCD camera, and the fixed plate (3) is provided with a fixing assembly (302) for fixing the CCD camera, wherein the fixing assembly (302) is located on one side of the sliding assembly (301).

7. The integrated dual tungsten electrode torch for TIG welding of claim 6, wherein, The fixed plate (3) is provided with a first sliding groove (303) located on the side of the sliding assembly (301) away from the fixing assembly (302), and the double-tungsten electrode welding torch (1) is fixed in the first sliding groove (303) through bolts.

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