Auxiliary fluid director for protective gas and welding device

Abstract

The invention provides an auxiliary fluid director for protective gas and a welding device, and relates to the technical field of welding protection, a tungsten electrode is arranged at the tail end of a welding gun body, and the auxiliary protective gas fluid director comprises a gas storage enclosure piece fixedly arranged on the periphery of the welding gun body in a sleeving mode, a gas storage cavity is formed between the inner wall of the gas storage fence piece and the outer wall of the welding gun body, and an outlet is formed in the end, facing the tungsten electrode, of the gas storage cavity. The gas sieve is fixedly arranged at the outlet of the gas storage cavity; the gas supply assembly is communicated with the gas storage cavity and is used for supplying protective gas to the gas storage cavity; and the nozzle clamp is fixedly arranged on the outer side of the gas storage enclosure piece, a gap is formed between the nozzle clamp and the gas storage enclosure piece, and the gap extends in the axis direction of the tungsten electrode. The action range of the protective gas can be adjusted, and the welding quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of welding protection, and in particular to an auxiliary flow guider for protective gas and a welding device. Background Art

[0002] TIG welding, also known as tungsten inert gas welding, is a welding method that uses the arc heat generated between the tungsten electrode and the weldment to melt the weldment and filler wire under the protection of inert gas. Shielding gas is an important component of TIG welding. It can protect the arc and molten pool from contamination by impurities such as oxygen and nitrogen in the air, and can also affect the characteristics of the arc and heat input.

[0003] In the prior art, when TIG welding is used for welding, especially in welding scenarios with deep grooves, if the tungsten electrode extends too long, or the shielding gas flow rate of the welding gun body is insufficient, the shielding gas may not be able to effectively protect the welding pool and the weld, resulting in the inability to guarantee welding quality. Summary of the invention

[0004] The problem to be solved by the present invention is that the welding pool and the weld may not be effectively protected during the TIG welding process, which affects the welding quality.

[0005] In order to solve the above problems, on the one hand, the present invention provides an auxiliary deflector for shielding gas, which is used in conjunction with a welding gun body. A tungsten electrode is provided at the end of the welding gun body. The auxiliary shielding gas deflector comprises:

[0006] A gas storage enclosure is fixedly sleeved on the periphery of the welding gun body, and a gas storage cavity is formed between the inner wall of the gas storage enclosure and the outer wall of the welding gun body, and the gas storage cavity has an outlet at one end facing the tungsten electrode;

[0007] An air screen is fixedly arranged at the outlet of the air storage cavity;

[0008] A gas supply assembly, connected to the gas storage cavity, and used for supplying protective gas to the gas storage cavity;

[0009] A nozzle clamp is fixedly arranged on the outside of the gas storage enclosure, and a gap is formed between the nozzle clamp and the gas storage enclosure, and the gap extends along the axial direction of the tungsten electrode;

[0010] A nozzle, one end of which is sleeved outside the gas storage enclosure and plugged into the gap and movable along the extension direction of the gap, and the other end of which extends toward the tungsten electrode and is provided with an air outlet.

[0011] Optionally, the nozzle clamp includes a nozzle clamp base and a clamping strip, and the nozzle clamp is made of elastic material. The nozzle clamp includes a nozzle clamp base and a clamping strip, and the nozzle clamp base is annular and fixedly sleeved outside the gas storage enclosure. One end of the clamping strip is fixedly connected to the nozzle clamp base, and the other end is a free end and extends in a direction close to the tungsten electrode. The gap is formed between the clamping strip and the outer wall of the gas storage enclosure, and the width of the gap is smaller than the wall thickness of the nozzle. A plurality of the clamping strips are provided, and the plurality of the clamping strips are evenly distributed on the periphery of the gas storage enclosure and a spacing is provided between two adjacent clamping strips.

[0012] Optionally, a friction portion is provided on the inner wall of the clamping strip.

[0013] Optionally, the gas storage chamber, the gas outlet of the nozzle and the welding gun body are concentrically arranged, and the end surface of the gas storage enclosure facing the tungsten electrode is provided with a porous structure, and the porous structure is distributed around the welding gun body to form the outlet of the gas storage chamber.

[0014] Optionally, the gas screen is an annular structure, and its outer circumferential surface and inner circumferential surface are respectively in contact with the inner wall of the gas storage enclosure and the outer wall of the welding gun body, one side surface of the gas screen is in contact with one end surface of the gas storage enclosure facing the tungsten electrode, and the other side surface is against a fixed component provided on the gas storage enclosure.

[0015] Optionally, the fixing assembly includes a fixing stud, a threaded hole is formed through the air storage enclosure, and a through hole is formed on the nozzle clamp base. One end of the fixing stud passes through the through hole and the threaded hole and extends into the air storage cavity, and abuts against the surface of the air screen, and the other end of the fixing stud is exposed from the nozzle clamp base, and the fixing stud is threadedly engaged with the threaded hole.

[0016] Optionally, the fixing assembly is also used to fix the nozzle clamp, and the fixing assembly further comprises a clamping nut, which is used to abut against the surface of the nozzle clamp base after threaded engagement with the other end of the fixing stud.

[0017] Optionally, the air supply assembly includes an air guide diverter and an external air supply pipe, the air guide diverter includes an air inlet portion, an inlet-outlet adapter portion and an air outlet portion, which are respectively hollow, the air inlet portion and the air outlet portion are connected via the inlet-outlet adapter portion, the air inlet portion is used to be externally connected to the external air supply pipe, one end of the air outlet portion away from the inlet-outlet adapter portion extends into the air storage chamber, and a gas outflow hole is provided on the air outlet portion.

[0018] Optionally, a flow direction of the protective gas flowing out through the gas outflow hole is not perpendicular to the surface of the gas screen.

[0019] The auxiliary flow deflector for shielding gas provided by the present invention is used for use in conjunction with a welding gun body with a tungsten electrode, and specifically comprises a gas storage enclosure, which is fixedly sleeved on the periphery of the welding gun body, and a gas storage chamber with an outlet is formed between the inner wall of the gas storage enclosure and the outer wall of the welding gun body, the gas storage chamber is supplied with shielding gas through a gas supply assembly, and a gas screen is fixedly arranged in the outlet of the gas storage chamber, thereby, the shielding gas in the storage chamber can be converted into a dense thin flow guided out from the outlet, and in addition, due to the arrangement of the nozzle clamp fixed on the outside of the gas storage enclosure and the formation of a gap between the nozzle clamp and the gas storage enclosure, the nozzle for guiding the shielding gas can be installed through the gap and can be installed along the gap The nozzle is moved in the extension direction of the gap, and the nozzle cover is provided with the outlet of the gas storage chamber, and the gas outlet of the nozzle is arranged toward the tungsten electrode. When the flow rate of the shielding gas is insufficient or in the scenario of welding with a deep groove, since the gap extends along the axial direction of the tungsten electrode, the nozzle can be moved and adjusted along the axial direction of the tungsten electrode according to actual needs, so that the length of the guide air channel formed between the nozzle and the welding gun body can be adjusted, thereby adjusting the effective range of the dense shielding gas derived from the guide air channel, so that the shielding gas derived from the guide air channel is closer to the tungsten electrode and can flow toward the tungsten electrode, so as to effectively protect the welding molten pool and the weld at the welding position to be welded, and ensure the welding quality.

[0020] On the other hand, the present invention further provides a welding device, comprising a welding gun body and the auxiliary flow guide of the shielding gas as described above.

[0021] The beneficial effects of the welding device provided by the present invention are the same as the beneficial effects of the auxiliary deflector of the shielding gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional structural diagram of an auxiliary flow guide for protective gas in an embodiment of the present invention is shown;

[0023] Figure 2 A three-dimensional diagram of an auxiliary flow guide for shielding gas in an embodiment of the present invention is shown;

[0024] Figure 3 A schematic diagram of the structure of the nozzle clamp in an embodiment of the present invention is shown;

[0025] Figure 4 Shows Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 5 A schematic diagram of the structure of the gas storage enclosure in an embodiment of the present invention is shown;

[0027] Figure 6 A schematic diagram of the structure of a gas splitter head in an embodiment of the present invention is shown.

[0028] Description of reference numerals:

[0029] 1. Nozzle clamp; 101. Nozzle clamp base; 102. Clamping strip; 2. Nozzle; 3. Gas storage enclosure; 4. Gas screen; 5. Gas guide and diverter; 501. Gas inlet; 502. Inlet and outlet adapter; 503. Gas outlet; 6. Fixing stud; 7. Compression nut; 8. Sealing gasket; 9. Tungsten electrode; 10. Welding gun body; 11. External gas supply pipe; 12. Welding machine connecting line; 13. Friction part; 14. Center notch; 15. Through hole; 16. Gas inlet connection hole; 17. Gas outflow hole; 18. Threaded hole. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0032] Reference Figure 1 As shown, on the one hand, an embodiment of the present invention proposes an auxiliary deflector for shielding gas, which is used in conjunction with a welding gun body 10. A tungsten electrode 9 is provided at the end of the welding gun body 10 for tungsten inert gas shielded welding, also known as TIG welding. The correct connection method is that the workpiece is connected to the positive pole of the power supply, and the tungsten electrode 9 in the welding gun body 10 is used as the negative pole.

[0033] The auxiliary protective gas deflector comprises:

[0034] A gas storage enclosure 3 is fixedly sleeved on the periphery of the welding gun body 10, and a gas storage cavity is formed between the inner wall of the gas storage enclosure 3 and the outer wall of the welding gun body 10, and the gas storage cavity has an outlet at one end facing the tungsten electrode 9;

[0035] Specifically, the gas storage enclosure 3 can be set as a cylindrical structure with a central penetration, and the central penetration part is just used to embed the welding gun body 10, and the top of the gas storage enclosure 3 can be fixed by interference fit along the periphery of the welding gun body 10, so that the gas storage enclosure 3 is fixedly sleeved on the periphery of the welding gun body 10, and a gas storage chamber is formed between the inner wall of the gas storage enclosure 3 and the outer wall of the welding gun body 10, and the end face of the hydrogen storage chamber away from the tungsten electrode 9 is sealed, and the outlet can be set at the end face close to the tungsten electrode 9, and the side of the hydrogen storage chamber remains sealed. Generally speaking, the gas storage enclosure 3 has a function similar to that of a "enclosure", and it and the outer wall of the welding gun body 10 together form a gas storage chamber, whereby the shielding gas can flow along the outer wall of the welding gun body 10 toward the tungsten electrode 9 after coming out of the outlet.

[0036] An air screen 4 is fixedly arranged at the outlet of the air storage chamber;

[0037] Specifically, the provision of the gas screen 4 can "screen" the gas flow in the storage chamber into dense thin flows, thereby improving the uniformity of the outflow of the protective gas.

[0038] A gas supply assembly, connected to the gas storage cavity, and used for supplying protective gas to the gas storage cavity;

[0039] Specifically, a protective gas with a certain pressure can be supplied from the outside into the gas storage chamber through the gas supply assembly, and the protective gas is an inert gas, such as argon.

[0040] The nozzle clamp 1 is fixedly arranged on the outside of the gas storage enclosure 3 , and a gap is formed between the nozzle clamp 1 and the gas storage enclosure 3 , and the gap extends along the axial direction of the tungsten electrode 9 .

[0041] Specifically, the nozzle clamp 1 is fixed on the outside of the gas storage enclosure 3, and can be indirectly fixed to the welding gun body 10 through the gas storage enclosure 3, and a gap is formed between the nozzle clamp 1 and the gas storage enclosure 3, and this gap is used to install the nozzle 2, and the gap extends along the axial direction of the tungsten electrode 9.

[0042] A nozzle 2, one end of which is sleeved outside the gas storage enclosure 3 and is plugged into the gap and movable along the extension direction of the gap, and the other end of which extends toward the tungsten electrode 9 and is provided with a gas outlet, thereby allowing the protective gas to flow to the discharge position of the tungsten electrode 9 through the outlet of the gas storage chamber.

[0043] Specifically, since the gap extends along the axial direction of the tungsten electrode 9, the portion where the nozzle 2 is installed is set at a section within the gap, that is, the air inlet end can be slid by an external force, such as by setting a driving mechanism such as a screw linear driving mechanism to enable the nozzle 2 to slide along the gap, or, the nozzle clamp 1 can be configured to have elasticity in the contact portion with the nozzle 2 to achieve elastic clamping of the nozzle 2, and a guide air duct is formed between the nozzle 2 and the welding gun body 10. Obviously, the inlet of the guide air duct is the outlet of the gas storage chamber, and the air outlet of the nozzle 2 is set toward the tungsten electrode 9. The nozzle 2 can be designed as follows: the extension range of the outlet of the guide air duct can cover the discharge tip of the tungsten electrode 9, so that the protective gas discharged from the guide air duct flows to the discharge position of the tungsten electrode 9, thereby forming protection around the arc discharged by the tungsten electrode 9 and the welding molten pool at the welding position.

[0044] The auxiliary flow deflector for shielding gas provided in the present embodiment is used for use in conjunction with a welding gun body 10 with a tungsten electrode 9, and specifically includes a gas storage enclosure 3, which is fixedly sleeved on the periphery of the welding gun body 10, and a gas storage chamber with an outlet is formed between the inner wall of the gas storage enclosure 3 and the outer wall of the welding gun body 10, and the gas storage chamber is supplied with shielding gas through a gas supply assembly, and a gas screen 4 is fixedly arranged in the outlet of the gas storage chamber, thereby, the shielding gas in the storage chamber can be converted into a dense thin flow guided out from the outlet, in addition, due to the arrangement of the nozzle clamp 1 fixed on the outside of the gas storage enclosure 3, and a gap is formed between the nozzle clamp 1 and the gas storage enclosure 3, the nozzle 2 for guiding the shielding gas can be installed through the gap and can be installed along the The nozzle 2 is moved in the extension direction of the gap, and the nozzle 2 covers the outlet of the gas storage chamber, and the gas outlet of the nozzle 2 is arranged toward the tungsten electrode 9. When the flow rate of the shielding gas is insufficient, or in the scenario of welding of deep grooves, since the gap extends along the axial direction of the tungsten electrode 9, the nozzle 2 can be moved and adjusted along the axial direction of the tungsten electrode 9 according to actual needs, so that the length of the guide air channel formed between the nozzle 2 and the welding gun body 10 can be adjusted, thereby adjusting the range of action of the dense shielding gas derived from the guide air channel, so that the shielding gas derived from the guide air channel is closer to the tungsten electrode 9 and can flow toward the tungsten electrode 9, so as to effectively protect the welding molten pool and the weld at the welding position to be welded, and ensure the welding quality.

[0045] As an optional embodiment of the present invention, the nozzle 2 can be gradually changed along the direction of outflow of the shielding gas, and the closing gas outlet of the nozzle 2 shrinks inwards in the direction close to the welding gun body 10, thereby forming a guide air duct with a decreasing size between the nozzle 2 and the welding gun body 10, so as to avoid interference of the guide air duct with the welding operation.

[0046] In addition, the nozzle 2 is made of high temperature resistant glass, and there is no line of sight obstructing the end of the tungsten electrode 9, which facilitates observation of the welding process.

[0047] like Figure 1 , Figure 2 and Figure 3 As shown, as an optional embodiment of the present invention, the nozzle clamp 1 is made of elastic material, and the nozzle clamp 1 includes a nozzle clamp base 101 and a clamping strip 102. The nozzle clamp base 101 is annular and fixedly sleeved outside the gas storage enclosure 3. One end of the clamping strip 102 is fixedly connected to the nozzle clamp base 101, and the other end is a free end and extends in a direction close to the tungsten electrode 9. The gap is formed between the clamping strip 102 and the outer wall of the gas storage enclosure 3, and the width of the gap is less than the wall thickness of the nozzle 2.

[0048] Specifically, the nozzle clamp base 101 is an annular structure, the inner ring of the annular structure is used to embed the welding gun body 10, and the outer ring is used to fix the clamping strip 102. The nozzle clamp 1 can be integrally formed. The setting of the clamping strip 102, when installing the gas storage enclosure 3, align the top of the gas storage enclosure 3 with the gap, and insert it along the gap between the inner wall of the free end of the clamping strip 102 and the outer wall of the gas storage enclosure 3, and select a suitable length of the exposed nozzle 2. Under the action of the elastic force of the clamping strip 102, the gas storage enclosure 3 will be clamped in the gap. When the clamping strip 102 is in a free state, the width of the gap is less than the wall thickness of the nozzle 2, so that after the gas storage enclosure 3 is installed, the clamping strip 102 is always in an outward expansion state, thereby, there is always a pressing force on the gas storage enclosure 3 to press the outer wall of the gas storage enclosure 3. The nozzle clamp base 101 can be made of plastic.

[0049] In this optional embodiment, regardless of the exposed length of the bottom of the nozzle 2, the nozzle 2 can be fixed, and when adjusting the gas guide length of the nozzle 2, the nozzle 2 can be pulled along the axial direction of the tungsten electrode 9 as required to achieve rapid adjustment.

[0050] like Figure 1 , Figure 2 and Figure 3 As shown, as an optional embodiment of the present invention, the nozzle clamp base 101 is arranged in a ring shape, and the clamping strip 102 is in a strip shape. When there are multiple clamping strips 102, the multiple clamping strips 102 are evenly distributed on the periphery of the gas storage enclosure 3 and a spacing is provided between two adjacent clamping strips 102.

[0051] In simple terms, the clamping bar 102 is in a comb-teeth shape.

[0052] Specifically, by means of a plurality of circumferentially arranged clamping strips 102, that is, a circle of clamping strips 102 is provided along the outer edge of the nozzle clamp base 101, the plurality of clamping strips 102 can clamp the air storage enclosure 3 together to improve the closing effect, and the purpose of providing a spacing between two adjacent clamping strips 102 is to prevent the clamping strips 102 from affecting each other during closing and opening, and to enable the closing of the plurality of clamping strips 102 to expand synchronously after the air storage enclosure 3 is installed, so as to firmly wrap the top section of the air storage enclosure 3 together.

[0053] exist Figure 1 In the embodiment, the welding gun body 10 is also connected with a welding machine connecting wire 12, and the welding machine connecting wire 12 is connected with an external welding machine.

[0054] like Figure 3 and Figure 4 As shown, as an optional embodiment of the present invention, the inner wall of the clamping strip 102 is provided with a friction portion 13 .

[0055] Specifically, at least one friction portion 13 can be provided on the inner wall of each of the nozzle clamp bases 101, and the friction portion 13 is preferably arranged horizontally, thereby, the clamping strip 102 is closed to firmly clamp the air storage enclosure 3, thereby ensuring the clamping effect of the air storage enclosure 3 and maintaining the clamped state, thereby improving the installation effect of the air storage enclosure 3, realizing stable airflow outlet, and preventing the position from loosening due to the airflow.

[0056] like Figure 1 As shown, as an optional embodiment of the present invention, the gas storage chamber, the gas outlet of the nozzle 2 and the welding gun body 10 are concentrically arranged, and the end face of the gas storage enclosure 3 facing the tungsten electrode 9 is provided with a porous structure, and the porous structure is distributed around the welding gun body 10 to form the outlet of the gas storage chamber.

[0057] Specifically, the outlet surrounds the welding gun body 10 toward the tungsten electrode 9. In this way, the shielding gas can flow from the storage chamber along the surface of the welding gun body 10 to the tungsten electrode 9, so that the shielding gas completely surrounds the tungsten electrode 9. Of course, when the tungsten electrode 9 discharges, the shielding gas can tightly surround the arc and the welding position to block the air. The porous structure constitutes the outlet. This porous structure is manifested as multiple holes opened on the bottom end face of the gas storage enclosure 3, that is, a porous structure is formed. The size of the pore size can be equivalent to the pore size of the gas screen 4, or slightly larger than that of the gas screen 4, and can be set according to actual needs. The shielding gas forms a dense surrounding airflow after passing through the gas screen 4 and the porous structure from the gas storage chamber.

[0058] In this optional embodiment, the gas storage chamber is concentric with the welding gun body 10, and the protective gas outflow surface, that is, the outlet of the gas storage chamber, is processed into a porous structure to control the uniformity of the outflow of the protective gas and surround the tungsten electrode 9 to act on the release point of the tungsten electrode 9 to improve the effect of isolating the air.

[0059] like Figure 1 and Figure 5 As shown, as an optional embodiment of the present invention, the gas screen 4 is an annular structure, and its outer circumferential surface and inner circumferential surface are respectively in contact with the inner wall of the gas storage enclosure 3 and the outer wall of the welding gun body 10, and one side surface of the gas screen 4 is in contact with one end surface of the gas storage enclosure 3 facing the tungsten electrode 9, and the other side surface is against the fixed component provided on the gas storage enclosure 3.

[0060] In this optional embodiment, the air screen 4 can be manufactured by welding multiple layers of stainless steel mesh to promote uniform pressure of the protective gas introduced by the air guide diverter 5 in the air storage chamber, thereby controlling the uniformity of the outflow of the protective gas. The air screen 4 can also be made of non-metallic material or metal material. After determining the mesh size of the air guide diverter 5, half of the processed air guide diverter 5 is meshed or fully loaded into the air storage chamber and set on the porous structure, that is, the porous structure supports it. The air screen 4 is provided with one or more layers. With the aid of a fixing assembly, the relative fixation of the air screen 4 and the air storage enclosure 3 can be achieved.

[0061] like Figure 2 , Figure 3 and Figure 4 As shown, as an optional embodiment of the present invention, the fixing assembly includes a fixing stud 6, a threaded hole 18 is opened through the air storage enclosure 3, and a through hole 15 is opened on the nozzle clamp base 101. One end of the fixing stud 6 extends into the air storage cavity after passing through the through hole 15 and the threaded hole 18, and abuts against the surface of the air screen 4, and the other end of the fixing stud 6 is exposed from the nozzle clamp base 101, and the fixing stud 6 is threadedly matched with the threaded hole 18.

[0062] Specifically, the bottom end of the fixing stud 6 passes through the through hole 15 on the end face of the nozzle clamp 1, is screwed into the threaded hole 18 on the upper end face of the air storage enclosure 3, and enters the air storage chamber, and presses against the surface of the air screen 4, thereby fixing the air screen 4. The other end exposes the nozzle clamp base 101, so that tightening and loosening can be achieved by rotating the fixing stud 6. In addition, the other end of the fixing stud 6 can be provided with a slot for tool operation, such as a slot for operation with a slotted screwdriver.

[0063] In this optional embodiment, the gas screen 4 can be fixed by setting a fixing component, and the gas screen 4 can be confined in the outlet of the gas storage chamber, so that the protective gas can form a dense airflow to act on the discharge position of the tungsten electrode 9.

[0064] In addition, a sealing gasket 8 is provided at the position where the nozzle clamp base 101 contacts the welding gun body 10. The sealing gasket 8 is made of heat-resistant plastic and installed between the top of the nozzle clamp 1 and the welding gun body 10 to prevent the protective gas from leaking at the joint between the top of the nozzle clamp 1 and the welding gun body 10.

[0065] like Figure 2 As shown, as an optional embodiment of the present invention, the fixing assembly is also used to fix the nozzle clamp 1, and the fixing assembly also includes a clamping nut 7, and the clamping nut 7 is used to abut against the surface of the nozzle clamp base 101 after threaded cooperation with the other end of the fixing stud 6.

[0066] Specifically, the fixing assembly is also used to fix the nozzle clamp 1, so that the nozzle clamp 1 can be detachably installed based on the welding gun body 10. The exposed end of the fixing stud 6 is located at the top of the nozzle clamp base 101, and is abutted against the surface of the nozzle clamp base 101 after being screwed by the clamping nut 7, so that the nozzle clamp 1 is pressed against the gas storage enclosure 3.

[0067] like Figure 2 As shown, it should be noted that the fixing studs 6 can be provided in plurality to achieve uniform fixing of the air screen 4 and the nozzle clamp 1 and avoid single-point force.

[0068] In this optional embodiment, by further utilizing the fixing stud 6 of the fixing assembly, the position of the welding gun body 10 can be fixed by only providing a clamping nut 7. Thus, the fixing stud 6 can simultaneously fix the gas screen 4 and the nozzle clamp 1.

[0069] like Figure 1 and Figure 6 As shown, as an optional embodiment of the present invention, the air supply component includes an air guide diverter 5 and an external air supply pipe 11, the air guide diverter 5 includes an air inlet portion 501, an inlet-outlet adapter portion 502 and an air outlet portion 503 which are respectively hollowly arranged, the air inlet portion 501 and the air outlet portion 503 are connected through the inlet-outlet adapter portion 502, the air inlet portion 501 is used to be externally connected to the external air supply pipe 11, and the air outlet portion 503 extends into the air storage chamber at one end away from the inlet-outlet adapter portion 502, and a gas outflow hole 17 is opened on the air outlet portion 503.

[0070] A central notch 14 is provided at the center of the nozzle clamp base 101 to allow the head of the welding gun body 10 to be exposed. An air inlet connection hole 16 is also provided on the nozzle clamp base 101 to allow the air guide diverter 5 to pass through.

[0071] Specifically, the distal end of the external gas supply pipe 11 is connected to the external gas supply bottle, the proximal end of the external gas supply pipe 11 is connected to the air inlet part 501, the inlet and outlet adapter part 502 connects the air inlet part 501 and the air outlet part 503, and the entire air guide diverter 5 can be in a right angle shape. The main purpose of the inlet and outlet adapter part 502 is to allow the protective gas from the external gas supply pipe 11 to turn and enter the gas storage chamber. In this way, the air guide diverter 5 penetrates the nozzle clamp 1 and the gas storage enclosure 3 to enter the gas storage chamber, and corresponding seals can be set at the penetration position of the air guide diverter 5 on the nozzle clamp 1 and the gas storage enclosure 3 to improve the sealing performance.

[0072] In this optional embodiment, the gas guide and diverter 5 can supply gas from one side of the top of the nozzle clamp 1, which will not hinder the use of welding, thereby achieving the effect of stable gas supply.

[0073] like Figure 6 As shown, as an optional embodiment of the present invention, the outflow direction of the protective gas flowing out through the gas outflow hole 17 is not perpendicular to the surface of the gas screen 4 .

[0074] Specifically, the outflow direction of the shielding gas flowing out through the gas outflow hole 17 is not perpendicular to the surface of the gas screen 4, so as to avoid impact on the surface of the gas screen 4 and the shielding gas directly going out from the outlet. Instead, a certain path is buffered in the gas storage chamber. The gas outlet portion 503 can be set to be tubular, and a plurality of gas outflow holes 17 are symmetrically opened along the radial direction of the gas outlet portion 503, and there is no gas outflow hole in the axial direction, so that the shielding gas enters the gas storage chamber from the side, and the gas pressure in the gas storage chamber is controlled to be uniform, thereby controlling the uniform outflow of the shielding gas and improving the protective effect of the shielding gas on welding.

[0075] On the other hand, the present invention further provides a welding device, comprising a welding gun body 10 and an auxiliary flow guide for the shielding gas as described in any one of the above embodiments.

[0076] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

[0077] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An auxiliary flow guide for shielding gas, used in conjunction with a welding gun body (10), wherein a tungsten electrode (9) is provided at the end of the welding gun body (10), characterized in that: The auxiliary protective gas deflector comprises: A gas storage enclosure (3) is fixedly sleeved on the periphery of the welding gun body (10), and a gas storage cavity is formed between the inner wall of the gas storage enclosure (3) and the outer wall of the welding gun body (10), and the gas storage cavity has an outlet at one end facing the tungsten electrode (9); An air screen (4) is fixedly arranged at the outlet of the air storage chamber; A gas supply assembly, connected to the gas storage cavity, and used for supplying protective gas to the gas storage cavity; A nozzle clamp (1) is fixedly arranged on the outside of the gas storage enclosure (3), a gap is formed between the nozzle clamp (1) and the gas storage enclosure (3), and the gap extends along the axial direction of the tungsten electrode (9); A nozzle (2), one end of which is sleeved outside the gas storage enclosure (3) and is plugged into the gap and movable along the extension direction of the gap, and the other end of which extends toward the tungsten electrode (9) and is provided with a gas outlet.

2. The auxiliary flow guide of the protective gas according to claim 1, characterized in that: The nozzle clamp (1) is made of elastic material, and comprises a nozzle clamp base (101) and a clamping strip (102). The nozzle clamp base (101) is annular and fixedly sleeved outside the gas storage enclosure (3). One end of the clamping strip (102) is fixedly connected to the nozzle clamp base (101), and the other end is a free end and extends in a direction close to the tungsten electrode (9). A gap is formed between the clamping strip (102) and the outer wall of the gas storage enclosure (3), and the width of the gap is smaller than the wall thickness of the nozzle (2). A plurality of the clamping strips (102) are provided, and the plurality of the clamping strips (102) are evenly distributed on the periphery of the gas storage enclosure (3), and a spacing is provided between two adjacent clamping strips (102).

3. The auxiliary flow guide of the protective gas according to claim 2, characterized in that: The inner wall of the clamping strip (102) is provided with a friction portion (13).

4. The auxiliary flow guide of the protective gas according to claim 2, characterized in that: The gas storage chamber, the gas outlet of the nozzle (2) and the welding gun body (10) are arranged concentrically, and the end surface of the gas storage enclosure (3) facing the tungsten electrode (9) is provided with a porous structure, and the porous structure is distributed around the welding gun body (10) to form the outlet of the gas storage chamber.

5. The auxiliary flow guide of the protective gas according to claim 4, characterized in that: The gas screen (4) is an annular structure, and its outer circumferential surface and inner circumferential surface are in contact with the inner wall of the gas storage enclosure (3) and the outer wall of the welding gun body (10) respectively; one side surface of the gas screen (4) is in contact with an end surface of the gas storage enclosure (3) facing the tungsten electrode (9), and the other side surface is in contact with a fixing component provided on the gas storage enclosure (3).

6. The auxiliary flow guide of the protective gas according to claim 5, characterized in that: The fixing assembly includes a fixing stud (6), a threaded hole (18) is formed through the air storage enclosure (3), and a through hole (15) is formed on the nozzle clamp base (101). One end of the fixing stud (6) passes through the through hole (15) and the threaded hole (18) and extends into the air storage cavity, and abuts against the surface of the air screen (4). The other end of the fixing stud (6) is exposed from the nozzle clamp base (101), and the fixing stud (6) is threadedly matched with the threaded hole (18).

7. The auxiliary flow guide of the protective gas according to claim 6, characterized in that: The fixing assembly further comprises a clamping nut (7), and the clamping nut (7) is used to be threadedly matched with the other end of the fixing stud (6) and then abut against the surface of the nozzle clamp base (101).

8. The auxiliary flow guide of the protective gas according to any one of claims 1 to 5, characterized in that: The air supply assembly comprises an air guide diverter (5) and an external air supply pipe (11); the air guide diverter (5) comprises an air inlet (501), an inlet-outlet adapter (502) and an air outlet (503) which are respectively arranged hollow; the air inlet (501) and the air outlet (503) are connected via the inlet-outlet adapter (502); the air inlet (501) is used to be externally connected to the external air supply pipe (11); one end of the air outlet (503) away from the inlet-outlet adapter (502) extends into the air storage chamber; and a gas outflow hole (17) is provided on the air outlet (503).

9. The auxiliary flow guide of the protective gas according to claim 8, characterized in that: The outflow direction of the protective gas flowing out through the gas outflow hole (17) is not perpendicular to the surface of the gas screen (4).

10. A welding device, characterized in that: The invention comprises a welding gun body (10) and an auxiliary flow guide for the shielding gas as claimed in any one of claims 1 to 9.

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