Gas guide assembly of gas shielded welding gun

Abstract

The utility model relates to the technical field of gas guiding of gas shielded welding guns, in particular to a gas guiding assembly of a gas shielded welding gun, which comprises a gas inlet pipe, a contact tube arranged at one end of the gas inlet pipe and gas dispersing holes arranged on the side wall of the gas inlet pipe. The side wall of the flow dividing sleeve is provided with a plurality of flow dividing holes, the inner wall of the flow dividing sleeve is provided with a vent groove, the flow dividing holes are communicated with the vent hole through the vent groove, the air inlet pipe is sleeved with an insulating cylinder, one side of the insulating cylinder is provided with a spray pipe, a spiral blade is sleeved with the spray pipe, and the spiral blade is arranged on the air inlet pipe in a sleeved mode. And the shunting hole and the contact tube are positioned in the spiral blade. The utility model provides a gas guide assembly of a gas shielded welding gun, which can reduce turbulent flow formed in a welding area, improve the welding quality and conveniently clean welding slag, and is used for overcoming the defects in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of gas guides of gas shielded welding guns, in particular to a gas guide component of a gas shielded welding gun. Background Art

[0002] The gas shielded welding gun is composed of a gun head, a gun tail and a welding gun cable. The gas shielded welding gun is a tool that uses welding wire and is protected by gas such as carbon dioxide for welding. During the welding process, the welding wire is fed to the welding gun through a wire feeder, and then the conductive nozzle is energized to form an arc between the conductive nozzle and the workpiece, and then the welding wire is used to weld the workpiece. In order to prevent unstable gases such as water vapor and hydrogen that may have adverse effects on the weld during the welding process, shielding gas is widely used as a medium for welding protection to ensure the quality of welding. Especially in automated welding technology, in order to ensure the quality of welding, a large amount of shielding gas is used to protect the welding area, that is, during the welding process, a specific inert shielding gas, such as argon, nitrogen and carbon dioxide, is continuously provided to the welding area to remove the air in the welding area, thereby forming a short-term inert gas protection zone, which can prevent the weld from being disturbed by certain active gases in the air, and ultimately achieve higher quality welding.

[0003] In order to concentrate the shielding gas in the welding area of ​​the workpiece, the head of the welding gun is equipped with an air inlet pipe, on which a nozzle is mounted, and a conductive nozzle is installed at one end of the air inlet pipe, so that the welding wire is transported into the air inlet pipe through the wire feeder, and the welding wire is inserted into the conductive nozzle to complete the welding operation. At the same time, one end of the air inlet pipe is closed, and a plurality of air diffusion holes are opened on the side wall of the air inlet pipe, so that the shielding gas input from the other end of the air inlet pipe is dispersed from the plurality of air diffusion holes to the gap between the nozzle and the air inlet pipe, and then the nozzle sprays the shielding gas from the exhaust end of the nozzle toward the welding area. The use of the nozzle on the welding gun can not only reduce the consumption of shielding gas, thereby saving production costs, but also ensure that more shielding gas is gathered in the welding area, thereby improving the welding quality.

[0004] When welding a workpiece with welding wire, in order to guide the welding wire to fall on the welding position of the workpiece, the nozzle needs to be transported along the vertical direction of the workpiece surface. For this reason, the direction in which the shielding gas is blown to the welding area is perpendicular to the workpiece. After the shielding gas is blown to the surface of the workpiece, the shielding gas will diffuse in all directions, resulting in turbulence in the welding area, which will cause the pressure of the shielding welding in the welding area to be uneven and unstable, thus affecting the quality of the welding. In addition, welding slag will be generated during the welding process. Since the shielding gas is continuously transported from the nozzle to the welding area, the welding slag will be blown away by the shielding gas. However, the shielding gas in the welding area forms turbulence, which makes it difficult to control the direction in which the welding slag flies out, making it very troublesome to clean the welding slag, which is not conducive to the development of welding operations. Summary of the invention

[0005] In view of the deficiencies in the prior art, the utility model provides a gas guide assembly for a gas shielded welding gun which reduces turbulence formed in a welding area, improves welding quality, and facilitates cleaning of welding slag, thereby overcoming the defects in the prior art.

[0006] The technical solution adopted by the utility model is: a gas guide component of a gas shielded welding gun, comprising an air inlet pipe, a conductive nozzle arranged at one end of the air inlet pipe and a diffuser hole opened on the side wall of the air inlet pipe, the air inlet pipe is sleeved with a diverter sleeve, a plurality of diverter holes are opened on the side wall of the diverter sleeve, a ventilation groove is opened on the inner wall of the diverter sleeve, the diverter holes are connected with the diffuser holes through the ventilation groove, the air inlet pipe is sleeved with an insulating cylinder, a nozzle is arranged on one side of the insulating cylinder, a spiral blade is sleeved in the nozzle, the spiral blade is sleeved on the air inlet pipe, and the diverter hole and the conductive nozzle are both located in the spiral blade.

[0007] Preferably, the side of the nozzle close to the conductive nozzle adopts a truncated cone cylindrical structure, the inner cavity diameter of the exhaust end of the nozzle is not larger than the inner cavity diameter of the middle part of the nozzle, the outer wall diameter of the spiral blade close to the conductive nozzle gradually decreases along the direction close to the exhaust end of the nozzle, and the outer wall of the spiral blade contacts the inner wall of the nozzle.

[0008] Preferably, the side of the nozzle away from the conductive nozzle adopts a cylindrical structure, the spiral blade is movably mounted in the nozzle, the outer wall diameter of one end of the spiral blade close to the exhaust end of the nozzle is not less than the inner cavity diameter of the exhaust end of the nozzle, a limit ring is mounted on the internal thread of the side of the nozzle away from the conductive nozzle, one side of the limit ring is in contact with the spiral blade, the spiral blade is squeezed on the side of the nozzle close to the conductive nozzle through the limit ring, and two limit blocks are arranged on the end surface of the limit ring away from the spiral blade, and the two limit blocks are respectively installed on both sides of the limit ring.

[0009] Preferably, a fixing sleeve is arranged between the diverter sleeve and the insulating sleeve, the fixing sleeve and the diverter sleeve are an integrated structure, the fixing sleeve is sleeved on the air inlet pipe, a first sealing ring is arranged between the fixing sleeve and the insulating sleeve, the first sealing ring is interference fit on the air inlet pipe, and the first sealing ring is clamped between the fixing sleeve and the insulating sleeve.

[0010] Preferably, the inner cavity of the nozzle away from the conductive nozzle adopts a stepped structure, the inner cavity diameter of the end of the nozzle away from the conductive nozzle and the outer wall diameter of the fixed sleeve are not less than the inner cavity diameter of the middle part of the nozzle, the outer wall diameter of the fixed sleeve is not less than the outer wall diameter of the diverter sleeve, the diverter sleeve is fitted with a second sealing ring, the outer wall diameter of the second sealing ring is not less than the inner cavity diameter of the middle part of the nozzle, and the second sealing ring is clamped between the fixed sleeve and the corner of the nozzle.

[0011] Preferably, a sealing groove is provided on the inner wall of the diverter sleeve, the sealing groove is located between the ventilation groove and the exhaust end of the nozzle, a third sealing ring is interference fit in the sealing groove, and the third sealing ring is interference fit on the intake pipe.

[0012] Preferably, the plurality of diverter holes are evenly distributed on the diverter sleeve along the circumferential direction of the diverter sleeve, and the plurality of diverter holes are respectively opened on the side wall of the diverter sleeve along an inclined direction, and the inclined direction of the diverter holes is toward the side of the spiral blade close to the conductive nozzle.

[0013] The beneficial effects of the utility model are as follows: firstly, the utility model guides and diverts the transported shielding gas through the air diffusion holes on the side wall of the air inlet pipe and the diverter holes and ventilation grooves on the diverter sleeve, so that the shielding gas evenly enters the inner cavity of the nozzle, and guides the shielding gas transported in the inner cavity of the nozzle by using the spiral blades and the inner wall of the nozzle, so that the shielding gas is blown toward the welding area in a direction inclined to the nozzle. Therefore, after the shielding gas is blown onto the surface of the workpiece, the shielding gas will be blown out in a single direction to reduce the turbulence formed in the welding area and improve the quality of welding. At the same time, it is convenient to blow out the welding slag in the welding area in a single direction to facilitate the cleaning of the welding slag.

[0014] Secondly, the utility model provides a truncated cone cylindrical structure on one side of the nozzle, so as to centrally process the shielding gas transported by the inner cavity of the nozzle, so as to facilitate the shielding gas to be concentratedly blown to the welding area, so as to reduce the consumption of shielding gas and save production costs. The utility model adopts a cylindrical structure on the side of the nozzle away from the conductive nozzle, and sets a limit ring on the inner thread of the nozzle, and presses the threaded blade on the nozzle, so as to facilitate the loading and unloading of the limit ring and the spiral blade, thereby facilitating the replacement and maintenance of the spiral blade.

[0015] Thirdly, the utility model provides a first sealing ring between the fixed sleeve and the insulating tube to prevent the protective gas from leaking from the gap between the fixed sleeve and the air inlet pipe; provides a second sealing ring between the fixed sleeve and the corner of the nozzle to prevent the protective gas from leaking from the gap between the fixed sleeve and the air inlet pipe; and provides a sealing groove on the inner wall of the diverter sleeve and a third sealing ring in the sealing groove to prevent the protective gas from leaking from the gap between one side of the diverter sleeve and the air inlet pipe, so as to improve the stability of the protective gas delivery. In addition, the utility model arranges the diverter hole along an inclined direction to guide the transported protective gas toward the spiral blades to reduce the turbulence formed in the nozzle and improve the stability of the protective gas delivery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional structural diagram of the utility model.

[0017] Figure 2 This is a three-dimensional cross-sectional view of the utility model installed on a curved pipe.

[0018] Figure 3 for Figure 2 A magnified schematic diagram of center A.

[0019] Figure 4 The utility model is a schematic diagram of the assembly of the flow dividing sleeve, the second sealing ring, the limit ring and the spiral blade.

[0020] Figure 5 It is a sectional stereoscopic view of the nozzle in the utility model. DETAILED DESCRIPTION

[0021] like Figures 1 to 5 As shown, a gas guide assembly of a gas shielded welding gun includes an air inlet pipe 1, a conductive nozzle 2 arranged at one end of the air inlet pipe 1, and a diffuser hole 3 opened on the side wall of the air inlet pipe 1, the air inlet pipe 1 is provided with a diverter sleeve 4, the side wall of the diverter sleeve 4 is provided with a plurality of diverter holes 5, the inner wall of the diverter sleeve 4 is provided with a venting groove 6, the diverter hole 5 is connected with the diffuser hole 3 through the venting groove 6, the air inlet pipe 1 is provided with an insulating tube 7, one side of the insulating tube 7 is provided with a nozzle 8, the nozzle 8 is provided with a spiral blade 9, the spiral blade 9 is provided on the air inlet pipe 1, the diverter hole 5 and The conductive nozzles 2 are all located in the spiral blades 9, and the shielding gas is transported into the air inlet pipe 1 through the other end of the air inlet pipe 1. Since the conductive nozzle 2 closes one end of the air inlet pipe 1, the shielding gas is diverted to the inner cavity of the nozzle 8 through the diffuser holes 3, the ventilation grooves 6 and the diverter holes 5. The shielding gas is guided by the spiral blades 9 and the inner wall of the nozzle 8, so that the shielding gas is blown toward the welding area in a direction inclined to the nozzle 8, that is, after the shielding gas is blown to the surface of the workpiece, the shielding gas will be blown out in a single direction to reduce the turbulence formed in the welding area and facilitate the blowing out of the welding slag in the welding area in a single direction.

[0022] In this embodiment, the side of the nozzle 8 close to the conductive nozzle 2 adopts a truncated cone cylindrical structure, and the inner cavity diameter of the exhaust end of the nozzle 8 is not larger than the inner cavity diameter of the middle part of the nozzle 8, so that the shielding gas transported by the inner cavity of the nozzle 8 is centrally processed, which is convenient for the shielding gas to be concentratedly blown to the welding area. The outer wall diameter of the spiral blade 9 close to the conductive nozzle 2 gradually decreases along the direction close to the exhaust end of the nozzle 8, and the outer wall of the spiral blade 9 contacts the inner wall of the nozzle 8 to guide the shielding gas transported by the inner cavity of the nozzle 8.

[0023] Specifically, the side of the nozzle 8 away from the conductive nozzle 2 adopts a cylindrical structure, and the spiral blade 9 is movably sleeved in the nozzle 8. The outer wall diameter of the end of the spiral blade 9 close to the exhaust end of the nozzle 8 is not less than the inner cavity diameter of the exhaust end of the nozzle 8. The inner thread of the side of the nozzle 8 away from the conductive nozzle 2 is sleeved with a limit ring 10, and the outer wall of the limit ring 10 is provided with an external thread groove, and the inner wall of the nozzle 8 is provided with an internal thread groove. The limit ring 10 of the nozzle 8 is connected with the internal thread groove by means of the external thread groove, and one side of the limit ring 10 contacts with the spiral blade 9. The spiral blade 9 is squeezed on the side of the nozzle 8 close to the conductive nozzle 2 through the limit ring 10. Two limit blocks 11 are arranged on the end surface of the limit ring 10 away from the spiral blade 9. The two limit blocks 11 are respectively installed on both sides of the limit ring 10. By twisting the limit block 11, the limit ring 10 is driven to rotate, thereby facilitating the loading and unloading of the limit ring 10 and the spiral blade 9.

[0024] Please refer again Figure 1 and 3 A fixing sleeve 12 is arranged between the diverter sleeve 4 and the insulating tube 7. The fixing sleeve 12 and the diverter sleeve 4 are an integrated structure. The fixing sleeve 12 is sleeved on the air inlet pipe 1. A first sealing ring 13 is arranged between the fixing sleeve 12 and the insulating tube 7. The first sealing ring 13 is interference fit on the air inlet pipe 1. The first sealing ring 13 is clamped between the fixing sleeve 12 and the insulating tube 7. The first sealing ring 13 is used to prevent the protective gas from leaking from the gap between the fixing sleeve 12 and the air inlet pipe 1.

[0025] Specifically, the inner cavity of the nozzle 8 away from the conductive nozzle 2 adopts a stepped structure, the inner cavity diameter of the end of the nozzle 8 away from the conductive nozzle 2 and the outer wall diameter of the fixed sleeve 12 are not less than the inner cavity diameter of the middle part of the nozzle 8, the outer wall diameter of the fixed sleeve 12 is not less than the outer wall diameter of the diverter sleeve 4, and the diverter sleeve 4 is interference-fitted with a second sealing ring 14, the outer wall diameter of the second sealing ring 14 is not less than the inner cavity diameter of the middle part of the nozzle 8, the second sealing ring 14 is clamped between the fixed sleeve 12 and the corner of the nozzle 8, and the second sealing ring 14 is used to prevent leakage from the gap between the protective gas nozzle and the fixed sleeve 12.

[0026] In this embodiment, a sealing groove 15 is provided on the inner wall of the diverter sleeve 4, and the sealing groove 15 is located between the ventilation groove 6 and the exhaust end of the nozzle 8. A third sealing ring 16 is interference fit in the sealing groove 15, and the third sealing ring 16 is interference fit on the intake pipe 1. The third sealing ring 16 is used to prevent the protective gas from leaking out from the gap between one side of the diverter sleeve 4 and the intake pipe 1.

[0027] Specifically, the plurality of diverter holes 5 are evenly distributed on the diverter sleeve 4 along the circumferential direction of the diverter sleeve 4, so that the diverter holes 5 evenly transport the shielding gas to the nozzle 8. The plurality of diverter holes 5 are respectively opened on the side wall of the diverter sleeve 4 along the inclined direction, and the inclined direction of the diverter holes 5 is toward the side of the spiral blade 9 close to the conductive nozzle 2, so that the shielding gas output by the diverter holes 5 is toward the side of the nozzle 8 close to the conductive nozzle 2, so as to guide the transported shielding gas, thereby reducing the formation of turbulence in the nozzle 8 and improving the stability of shielding gas transportation.

[0028] The assembly method of this product is as follows: Figures 2 to 3 As shown, first, the insulating tube 7, the first sealing ring 13 and the flow divider sleeve 4 with the third sealing ring 16 are sequentially installed on the air inlet pipe 1, and the conductive nozzle 2 is installed on the air inlet pipe 1. At the same time, the spiral blade 9 is placed in the nozzle 8, and the spiral blade 9 is pressed and fixed in the nozzle 8 by placing the limit ring 10 on the inner wall of the nozzle 8. Then the second sealing ring 14 is sleeved on the flow divider sleeve 4, and the nozzle 8 is sleeved on the insulating tube 7, so that the second sealing ring 14 is clamped between the fixing sleeve 12 and the corner of the nozzle 8. Finally, the air inlet pipe 1 is installed on the elbow of the welding gun, so that the shielding gas is transported to the air inlet pipe 1 through the elbow.

[0029] The shielding gas is guided as follows: Figures 1 to 5 As shown, the shielding gas is delivered to the air inlet pipe 1 through the bend of the welding gun. Since the conductive nozzle 2 seals one end of the air inlet pipe 1, the shielding gas delivered to the air inlet pipe 1 is diverted to the inner cavity of the nozzle 8 through the diffuser hole 3, the vent groove 6 and the diverter hole 5. By using the diverter hole 5 set obliquely, the shielding gas flowing out of the diverter hole 5 is delivered toward the exhaust end of the nozzle 8 to reduce the turbulence formed in the nozzle 8. Then, the shielding gas is guided by the spiral blade 9 and the inner wall of the nozzle 8, so that the shielding gas is blown toward the welding area in a direction inclined to the nozzle 8, so that the welding wire set in the conductive nozzle 2 can weld the workpiece.

[0030] In this embodiment, the shielding gas is guided and diverted by the air diffusion holes 3 provided on the side wall of the air inlet pipe 1 and the diverter holes 5 and the ventilation grooves 6 provided on the diverter sleeve 4, so that the shielding gas evenly enters the inner cavity of the nozzle 8. The shielding gas transported in the inner cavity of the nozzle 8 is guided by the spiral blades 9 and the inner wall of the nozzle 8, so that the shielding gas is blown toward the welding area in a direction inclined to the nozzle 8. Therefore, after the shielding gas is blown onto the surface of the workpiece, the shielding gas will be blown out in a single direction to reduce the turbulence formed in the welding area and improve the quality of welding. At the same time, it is convenient to blow out the welding slag in the welding area in a single direction to facilitate the cleaning of the welding slag.

[0031] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A gas guide assembly for a gas shielded welding gun, comprising an air inlet pipe (1), a conductive nozzle (2) disposed at one end of the air inlet pipe (1), and a gas diffusion hole (3) provided on a side wall of the air inlet pipe (1), characterized in that: The air intake pipe (1) is provided with a flow divider sleeve (4), a plurality of flow divider holes (5) are provided on the side wall of the flow divider sleeve (4), a ventilation groove (6) is provided on the inner wall of the flow divider sleeve (4), the flow divider holes (5) are connected with the air diffusion holes (3) through the ventilation groove (6), the air intake pipe (1) is provided with an insulating tube (7), a nozzle (8) is provided on one side of the insulating tube (7), a spiral blade (9) is provided inside the nozzle (8), the spiral blade (9) is provided on the air intake pipe (1), and the flow divider holes (5) and the conductive nozzle (2) are both located inside the spiral blade (9).

2. The gas guide assembly of the gas shielded welding gun according to claim 1, characterized in that: The side of the nozzle (8) close to the conductive nozzle (2) adopts a truncated cone cylindrical structure, the inner cavity diameter of the exhaust end of the nozzle (8) is not greater than the inner cavity diameter of the middle part of the nozzle (8), the outer wall diameter of the side of the spiral blade (9) close to the conductive nozzle (2) gradually decreases along the direction close to the exhaust end of the nozzle (8), and the outer wall of the spiral blade (9) contacts the inner wall of the nozzle (8).

3. The gas guide assembly of the gas shielded welding gun according to claim 1, characterized in that: The side of the nozzle (8) away from the conductive nozzle (2) adopts a cylindrical structure, the spiral blade (9) is movably sleeved in the nozzle (8), the outer wall diameter of one end of the spiral blade (9) close to the exhaust end of the nozzle (8) is not less than the inner cavity diameter of the exhaust end of the nozzle (8), the side of the nozzle (8) away from the conductive nozzle (2) is sleeved with a limit ring (10) through the internal thread, one side of the limit ring (10) is in contact with the spiral blade (9), the spiral blade (9) is squeezed on the side of the nozzle (8) close to the conductive nozzle (2) through the limit ring (10), and two limit blocks (11) are arranged on the end surface of the limit ring (10) away from the spiral blade (9), and the two limit blocks (11) are respectively installed on the two sides of the limit ring (10).

4. The gas guide assembly of a gas shielded welding gun according to claim 1, characterized in that: A fixing sleeve (12) is arranged between the flow-dividing sleeve (4) and the insulating sleeve (7); the fixing sleeve (12) and the flow-dividing sleeve (4) are an integral structure; the fixing sleeve (12) is sleeved on the air inlet pipe (1); a first sealing ring (13) is arranged between the fixing sleeve (12) and the insulating sleeve (7); the first sealing ring (13) is interference-fitted on the air inlet pipe (1); and the first sealing ring (13) is clamped between the fixing sleeve (12) and the insulating sleeve (7).

5. The gas guide assembly of the gas shielded welding gun according to claim 4, characterized in that: The inner cavity of the nozzle (8) at the side away from the conductive nozzle (2) adopts a stepped structure, the inner cavity diameter of the end of the nozzle (8) away from the conductive nozzle (2) and the outer wall diameter of the fixed sleeve (12) are not less than the inner cavity diameter of the middle part of the nozzle (8), the outer wall diameter of the fixed sleeve (12) is not less than the outer wall diameter of the diverter sleeve (4), the second sealing ring (14) is provided with an interference fit on the diverter sleeve (4), the outer wall diameter of the second sealing ring (14) is not less than the inner cavity diameter of the middle part of the nozzle (8), and the second sealing ring (14) is clamped between the fixed sleeve (12) and the corner of the nozzle (8).

6. The gas guide assembly of a gas shielded welding gun according to claim 1, characterized in that: A sealing groove (15) is provided on the inner wall of the flow distribution sleeve (4), the sealing groove (15) being located between the ventilation groove (6) and the exhaust end of the nozzle (8), a third sealing ring (16) is interference fit inside the sealing groove (15), and the third sealing ring (16) is interference fit on the intake pipe (1).

7. The gas guide assembly of a gas shielded welding gun according to claim 1, characterized in that: The plurality of flow diversion holes (5) are evenly distributed on the flow diversion sleeve (4) along the circumferential direction of the flow diversion sleeve (4), and the plurality of flow diversion holes (5) are respectively opened on the side wall of the flow diversion sleeve (4) along an inclined direction, and the inclined direction of the flow diversion holes (5) is toward the side of the spiral blade (9) close to the conductive nozzle (2).

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