Large-current welding gun

Abstract

The utility model relates to the technical field of welding guns, in particular to a high-current welding gun which comprises a main sleeve, a conductor sleeve is arranged in the main sleeve, an insulating sleeve and an insulating gas screen are arranged on the outer side of the main sleeve in a sleeving mode, the insulating gas screen is arranged at the bottom of the insulating sleeve, a main body shell is arranged on the outer side of the insulating sleeve and the outer side of the insulating gas screen in a sleeving mode, and a nested shell is arranged on the lower portion of the main body shell in a sleeving mode. The lower portion of the nesting shell is connected with a nozzle, the gas channel is defined by the outer side of the main sleeve, the insulating sleeve, the insulating gas screen and the main body shell and communicated with the nozzle, the gas inlet pipe is communicated with the gas channel, the water inlet pipe and the water return pipe are both communicated with the cooling water channel, and protective gas is introduced into the gas channel. The protective gas can cool the electric conductor and can reach the nozzle, the cooling range in the welding gun is expanded, the cooling water channel is formed in the outer side of the gas channel, heat exchange with the protective gas can be conducted while the electric conductor is cooled, and the use temperature of the welding gun is remarkably reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of welding guns, in particular to a high-current welding gun. Background Art

[0002] Tungsten inert gas welding is a traditional welding method that has been widely used in industrial production. During the welding process, the gun body must be water-cooled due to the high temperature of the welding gun. Therefore, only by ensuring that the water flow in the gun body is smooth can good welding quality be guaranteed. The high-current welding gun currently used uses a section of ceramic tube as a cooling water circulation pipeline in its gun body. However, since the pipe diameter of its cooling water input pipeline and circulating water outflow pipeline is smaller than the water channel diameter formed between the ceramic cooling water channel and the conductive cylinder in the gun body, the plasma welding gun is often burned due to insufficient cooling water supply and poor discharge of circulating hot water. Utility Model Content

[0003] The purpose of the utility model is to provide a high-current welding gun to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-current welding gun, comprising a gas channel, a cooling water channel, an air inlet pipe, a water inlet pipe and a water return pipe, including a main sleeve, a conductor sleeve is arranged inside the main sleeve, an insulating sleeve and an insulating gas screen are arranged outside the main sleeve, the insulating gas screen is arranged at the bottom of the insulating sleeve, the insulating sleeve and the insulating gas screen are together sleeved with a main shell, the lower part of the main shell is overlapped with a nested shell, the lower part of the nested shell is connected to a nozzle, the gas channel is surrounded by the outer side of the main sleeve together with the insulating sleeve, the insulating gas screen and the main shell, and the gas channel is connected to the nozzle, the air inlet pipe is connected to the gas channel, and the water inlet pipe and the water return pipe are both connected to the cooling water channel.

[0005] By adopting the above technical solution: a gas channel and a cooling water channel are provided, a shielding gas is introduced into the gas channel, the shielding gas can cool the conductor and the shielding gas can reach the nozzle, thereby expanding the cooling range inside the welding gun, and the cooling water channel is provided on the outside of the gas channel, which can cool the conductor and exchange heat with the shielding gas at the same time, significantly reducing the operating temperature of the welding gun, greatly improving the operating environment of the welding gun, and thereby increasing the service life of the welding gun.

[0006] An outer wall air groove connected to the air inlet is provided on the outer side of the upper part of the insulating sleeve, an inner wall air groove is provided on the inner side of the lower part of the insulating sleeve, a first air hole for connecting the outer wall air groove and the inner wall air groove is provided on the insulating sleeve, an air duct connected to the nozzle is reserved on the inner side of the lower part of the main shell, a second air hole for connecting the inner wall air groove and the air duct is provided on the insulating air screen, and an air inlet for connecting to the air inlet pipe is also provided on the main shell.

[0007] By adopting the above technical solution: the gas channel is composed of the inner wall gas groove, the outer wall gas groove, the first gas hole, the second gas hole and the airway, and the gas channel can extend from the top to the bottom of the main sleeve to increase the cooling area.

[0008] An inner wall water groove is provided on the inner side of the nested shell, and the cooling water channel is surrounded by the outer wall of the main shell and the inner wall water groove. A water inlet and a water return port connected to the inner wall water groove are provided on the nested shell, and an extension seat is connected to the nested shell. A water inlet channel and a water return channel connected to the water inlet and the water return port are provided in the extension seat, and the water inlet channel and the water return channel are used to be connected to the water inlet pipe and the water outlet pipe respectively.

[0009] By adopting the above technical solution: the cooling water channel is surrounded by the main shell and the nested shell, and the cooling water channel is connected to the water inlet pipe and the water outlet pipe, so that the cooling water can be circulated in and out, and the cooling water channel and the gas channel are adjacent. The heat between the protective gas and the conductor can be taken away through the cooling water channel, thereby improving the cooling effect.

[0010] An annular limiting protrusion is provided on the upper part of the main sleeve, an annular groove corresponding to the limiting protrusion is provided on the top of the insulating sleeve, a first annular notch is provided on the annular groove, a first sealing ring is provided in the first annular notch, and a rear cover is also connected to the top of the insulating sleeve.

[0011] By adopting the above technical solution: the limiting protrusion is arranged between the main sleeve and the rear cover, and the sealing between the main sleeve and the insulating sleeve is ensured by installing a first sealing ring in the limiting protrusion, thereby ensuring the sealing of the gas channel.

[0012] The top of the insulating sleeve is provided with a flange, the top of the main shell is fixedly connected to the bottom of the flange, and the outer lower edge of the flange is provided with a second annular notch, and the second annular notch is used to install a second sealing ring.

[0013] By adopting the above technical solution: the insulating sleeve is provided with a flange for connecting the back cover and the main shell, and a second sealing ring is installed on the outside of the insulating sleeve to ensure the sealing between the insulating sleeve and the main shell, and further ensure the sealing of the gas channel.

[0014] A connecting neck is extended upward from the upper part of the limiting protrusion, a pressing cap is connected to the connecting neck, a connecting rod is fixed inside the pressing cap, and the lower end of the connecting rod extends into the connecting neck and is fixedly connected to the conductor through the conductor sleeve.

[0015] By adopting the above technical solution: a connecting neck is provided for placing the conductor, and the conductor can be disassembled and installed through the connection between the pressure cap and the connecting neck.

[0016] Technical effects and advantages of the utility model:

[0017] 1. In this scheme, a gas channel and a cooling water channel are provided. The gas channel is passed with a shielding gas, which can cool the conductor and reach the nozzle, thereby expanding the cooling range inside the welding gun. The cooling water channel is provided on the outside of the gas channel, which can cool the conductor and exchange heat with the shielding gas at the same time, thereby significantly reducing the operating temperature of the welding gun, greatly improving the operating environment of the welding gun, and thereby increasing the service life of the welding gun.

[0018] 2. In this solution, the gas channel is composed of an inner wall gas groove, an outer wall gas groove, a first gas hole, a second gas hole and an air duct. The gas channel can extend from the top to the bottom of the main sleeve to increase the cooling area. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the overall structure of the high current welding gun provided for this application;

[0020] Figure 2 A schematic cross-sectional view of a high current welding gun provided in this application;

[0021] Figure 3 for Figure 1 A schematic diagram of the partial structure of a high current welding gun;

[0022] Figure 4 A schematic diagram of the half-section structure of the insulating sleeve of the high-current welding gun provided in the present application.

[0023] Figure numerals: 1. conductor; 2. main sleeve; 3. back cover; 4. insulating sleeve; 401. outer wall air groove; 402. first air hole; 403. inner wall air groove; 404. flange; 405. annular groove; 406. first annular notch; 407. second annular notch; 5. main shell; 501. air inlet; 502. air duct; 6. nested shell; 601. water inlet; 602. water return port; 603. inner wall water groove; 7. insulating air screen; 701. second air hole; 8. nozzle; 9. air inlet pipe; 10. water inlet pipe; 11. water return pipe; 12. pressure cap; 13. conductor sleeve; 14. extension seat. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] This embodiment provides Figure 1The high-current welding gun shown in the figure contains a gas channel and a cooling water channel. One side of the welding gun is connected to an air inlet pipe 9, a water inlet pipe 10 and a return pipe 11. Its structure includes a main sleeve 2, a conductor sleeve 1 is arranged inside the main sleeve 2, an insulating sleeve 4 and an insulating gas screen 7 are arranged on the outside of the main sleeve 2, the insulating gas screen 7 is arranged at the bottom of the insulating sleeve 4, and a main shell 5 is arranged on the outside of the insulating sleeve 4 and the insulating gas screen 7. The lower part of the main shell 5 is overlapped with a nested shell 6, and the lower part of the nested shell 6 is connected to a nozzle 8. The gas channel is surrounded by the outer side of the main sleeve 2 together with the insulating sleeve 4, the insulating gas screen 7 and the main shell 5, and the gas channel is connected to the nozzle 8. The air inlet pipe 9 is connected to the gas channel, and the water inlet pipe 10 and the return pipe 11 are both connected to the cooling water channel. Since a gas channel and a cooling water channel are provided in the welding gun, a shielding gas is introduced into the gas channel, the shielding gas can cool down the conductor 1 and the shielding gas can reach the nozzle 8, thereby expanding the cooling range inside the welding gun, and the cooling water channel is provided on the outside of the gas channel, which can cool down the conductor 1 and exchange heat with the shielding gas at the same time, significantly reducing the operating temperature of the welding gun, thereby ensuring that the welding gun can use a large current, greatly improving the use environment of the welding gun, and thereby increasing the service life of the welding gun.

[0026] like Figure 2 and Figure 3 As shown, the outer side of the upper part of the insulating sleeve 4 is provided with an outer wall gas groove 401 connected to the air inlet 501, the inner side of the lower part of the insulating sleeve 4 is provided with an inner wall gas groove 403, the insulating sleeve 4 is provided with a first air hole 402 for connecting the outer wall gas groove 401 and the inner wall gas groove 403, the inner side of the lower part of the main shell 5 is provided with an air passage 502 connected to the nozzle 8, the insulating air screen 7 is provided with a second air hole 701 for connecting the inner wall gas groove 403 and the air passage 502, and the main shell 5 is also provided with an air inlet 501 for connecting to the air inlet pipe 9. The gas passage is composed of the inner wall gas groove 403, the outer wall gas groove 401, the first air hole 402, the second air hole 701 and the air passage 502, according to Figure 2 The gas path on the main sleeve 2 is: air inlet pipe 9 - air inlet 501 - outer wall air groove 401 - first air hole 402 - inner wall air groove 403 - second air hole 701 - air channel 502 - nozzle 8. It can be seen that the gas channel can extend from the top to the bottom of the main sleeve 2 to increase the cooling area.

[0027] Furthermore, an inner wall water groove 603 is provided on the inner side of the nested shell 6, and a cooling water channel is surrounded by the outer wall of the main shell 5 and the inner wall water groove 603. A water inlet 601 and a water return port 602 connected to the inner wall water groove 603 are provided on the nested shell 6. An extension seat 14 is connected to the nested shell 6. An inlet channel and a water return channel connected to the inlet 601 and the water return port 602 are provided in the extension seat 14. The inlet channel and the water return channel are used to be connected to the water inlet pipe 10 and the water outlet pipe, respectively. The cooling water channel is surrounded by the main shell 5 and the nested shell 6. The cooling water channel is connected to the water inlet pipe 10 and the water outlet pipe, so that the cooling water can be circulated in and out, and the cooling water channel is adjacent to the gas channel. The heat between the protective gas and the conductor 1 can be taken away through the cooling water channel to improve the cooling effect.

[0028] In this embodiment, Figure 2 As shown, the upper part of the main sleeve 2 is provided with an annular limiting protrusion, the top of the insulating sleeve 4 is provided with an annular groove 405 corresponding to the limiting protrusion, the annular groove 405 is provided with a first annular notch 406, the first annular notch 406 is provided with a first sealing ring, and the top of the insulating sleeve 4 is also connected to the back cover 3. The limiting protrusion is provided between the main sleeve 2 and the back cover 3, and the sealing between the main sleeve 2 and the insulating sleeve 4 is ensured by installing the first sealing ring in the limiting protrusion, thereby ensuring the sealing of the gas channel. Figure 4 As shown, the top of the insulating sleeve 4 is provided with a flange 404, the top of the main housing 5 is fixedly connected to the bottom of the flange 404, and the outer lower edge of the flange 404 is provided with a second annular notch 407, and the second annular notch 407 is used to install a second sealing ring. The insulating sleeve 4 is provided with a flange 404 for connecting the back cover 3 and the main housing 5, and the second sealing ring is installed on the outer side of the insulating sleeve 4 to ensure the sealing between the insulating sleeve 4 and the main housing 5, and further ensure the sealing of the gas channel.

[0029] Furthermore, a connection neck is provided on the upper part of the limiting protrusion, and a pressure cap 12 is connected to the connection neck. A connecting rod is fixed in the pressure cap 12. The lower end of the connecting rod extends into the connection neck and is fixedly connected to the conductor 1 through the conductor 1 sleeve. The connection neck is provided for placing the conductor 1, and the conductor 1 can be disassembled and installed through the connection between the pressure cap 12 and the connection neck.

[0030] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high current welding gun, comprising a gas channel, a cooling water channel, an air inlet pipe (9), a water inlet pipe (10) and a water return pipe (11), characterized in that: The invention comprises a main sleeve (2), wherein a conductor (1) sleeve is arranged inside the main sleeve (2), an insulating sleeve (4) and an insulating air screen (7) are arranged outside the main sleeve (2), the insulating air screen (7) is arranged at the bottom of the insulating sleeve (4), a main shell (5) is sleeved on the outside of the insulating sleeve (4) and the insulating air screen (7), a nested shell (6) is sleeved on the lower part of the main shell (5), a nozzle (8) is connected to the lower part of the nested shell (6), a gas channel is surrounded by the outer side of the main sleeve (2) and the insulating sleeve (4), the insulating air screen (7) and the main shell (5), and the gas channel is connected to the nozzle (8), the air inlet pipe (9) is connected to the gas channel, and the water inlet pipe (10) and the water return pipe (11) are both connected to the cooling water channel.

2. The high current welding gun according to claim 1, characterized in that: The outer side of the upper part of the insulating sleeve (4) is provided with an outer wall air groove (401) connected to the air inlet (501), the inner side of the lower part of the insulating sleeve (4) is provided with an inner wall air groove (403), the insulating sleeve (4) is provided with a first air hole (402) for connecting the outer wall air groove (401) and the inner wall air groove (403), the inner side of the lower part of the main shell (5) is provided with an air channel (502) connected to the nozzle (8), the insulating air screen (7) is provided with a second air hole (701) for connecting the inner wall air groove (403) and the air channel (502), and the main shell (5) is also provided with an air inlet (501) for connecting to the air inlet pipe (9).

3. The high current welding gun according to claim 2, characterized in that: An inner wall water groove (603) is provided on the inner side of the nested shell (6); the cooling water channel is surrounded by the outer wall of the main shell (5) and the inner wall water groove (603); a water inlet (601) and a water return port (602) connected to the inner wall water groove (603) are provided on the nested shell (6); an extension seat (14) is connected to the nested shell (6); a water inlet channel and a water return channel connected to the water inlet (601) and the water return port (602) are provided in the extension seat (14); the water inlet channel and the water return channel are used to be connected to the water inlet pipe (10) and the water outlet pipe respectively.

4. The high current welding gun according to claim 3, characterized in that: An annular limiting protrusion is provided on the upper part of the main sleeve (2); an annular groove (405) corresponding to the limiting protrusion is provided on the top of the insulating sleeve (4); a first annular notch (406) is provided on the annular groove (405); a first sealing ring is provided in the first annular notch (406); and a rear cover (3) is also connected to the top of the insulating sleeve (4).

5. The high current welding gun according to claim 2, characterized in that: The top of the insulating sleeve (4) is provided with a flange (404), the top of the main shell (5) is fixedly connected to the bottom of the flange (404), and the outer lower edge of the flange (404) is provided with a second annular notch (407), and the second annular notch (407) is used to install a second sealing ring.

6. The high current welding gun according to claim 4, characterized in that: A connecting neck is provided on the upper part of the limiting protrusion extending upwards, and a pressure cap (12) is connected to the connecting neck. A connecting rod is fixedly provided inside the pressure cap (12), and the lower end of the connecting rod extends into the connecting neck and is fixedly connected to the conductor (1) through the conductor (1) sleeve.

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