A protective gas auxiliary flow guide and welding device

Abstract

The application provides a kind of auxiliary flow guide of protective gas and welding device, relate to welding protection technical field, the end of the welding torch body is equipped with tungsten electrode, the auxiliary protective gas flow guide includes: gas storage fence, fixedly covered in the periphery of the welding torch body, the inner wall of the gas storage fence and the outer wall of the welding torch body form gas storage cavity, the one end of the gas storage cavity towards the tungsten electrode has outlet;Gas screen, fixedly set at the outlet of the gas storage cavity;Gas supply assembly, in communication with the gas storage cavity, for supplying protective gas to the gas storage cavity;Nozzle clamp, fixedly set outside the gas storage fence, the gap between the nozzle clamp and the gas storage fence, the gap extends along the axial direction of the tungsten electrode.The application, the action range of protective gas can be adjusted, to ensure the welding quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding protection, in particular to an auxiliary flow guide for protective gas and a welding device. BACKGROUND

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

[0003] In the prior art, when TIG welding is used for welding, especially in the welding scene with a deep groove, if the tungsten electrode is too long or the protective gas flow of the welding gun body is insufficient, the protective gas may not be able to effectively protect the welding pool and the weld, resulting in a failure to guarantee the welding quality. SUMMARY

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

[0005] To solve the above problems, on the one hand, the present application provides an auxiliary flow guide for protective gas, which is used in cooperation with a welding gun body, the distal end of the welding gun body is provided with a tungsten electrode, and the auxiliary protective gas flow guide comprises:

[0006] A gas storage enclosure is fixedly sleeved around the welding gun body, 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 end of the gas storage cavity facing the tungsten electrode has an outlet;

[0007] A gas screen is fixedly arranged at the outlet of the gas storage cavity;

[0008] A gas supply assembly is in communication with the gas storage cavity and is used to supply protective gas to the gas storage cavity;

[0009] A nozzle clamp is fixedly arranged outside the gas storage enclosure, 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 is sleeved outside the gas storage enclosure at one end, is in plug-in cooperation with the gap and can move along the extension direction of the gap, and extends towards the tungsten electrode at the other end and is provided with a gas outlet.

[0011] Optionally, the nozzle clamp comprises a nozzle clamp base and a clamp strip, the nozzle clamp is made of elastic material, the nozzle clamp comprises a nozzle clamp base and a clamp strip, the nozzle clamp base is annular and fixedly sleeved outside the gas storage barrier, one end of the clamp strip is fixedly connected with the nozzle clamp base, the other end is a free end and extends towards the tungsten electrode, the gap is formed between the clamp strip and the outer wall of the gas storage barrier, and the width of the gap is smaller than the wall thickness of the nozzle, and the clamp strip is provided in plurality, and the plurality of clamp strips are uniformly distributed on the periphery of the gas storage barrier and a spacing is provided between adjacent two clamp strips.

[0012] Optionally, the inner wall of the clamp strip is provided with a friction part.

[0013] Optionally, the gas storage cavity, the gas outlet of the nozzle and the welding torch body are concentrically arranged, the end face of the gas storage barrier towards the tungsten electrode is provided with a porous structure, and the porous structure is distributed around the welding torch body to form the outlet of the gas storage cavity.

[0014] Optionally, the gas screen is annular in structure, the outer circumferential surface and the inner circumferential surface thereof are in contact with the inner wall of the gas storage barrier and the outer wall of the welding torch body respectively, one side surface of the gas screen is attached to the end face of the gas storage barrier towards the tungsten electrode, and the other side surface is abutted against the fixing assembly provided on the gas storage barrier.

[0015] Optionally, the fixing assembly comprises a fixing stud, a threaded hole is provided through the gas storage barrier, a through hole is provided through the nozzle clamp base, one end of the fixing stud extends into the gas storage cavity after passing through the through hole and the threaded hole and is in abutment with the surface of the gas screen, the other end of the fixing stud is exposed from the nozzle clamp base, and the fixing stud is threadedly connected with the threaded hole.

[0016] Optionally, the fixing assembly is also used for fixing the nozzle clamp, and the fixing assembly further comprises a compression nut, the compression nut is used for being threadedly connected with the other end of the fixing stud after abutting against the surface of the nozzle clamp base.

[0017] Optionally, the gas supply assembly comprises a gas guide and shunt and an external gas supply pipe, the gas guide and shunt comprises a hollow gas inlet part, a gas inlet-outlet adapter and a gas outlet part respectively, the gas inlet part and the gas outlet part are communicated through the gas inlet-outlet adapter, the gas inlet part is used for being externally connected with the external gas supply pipe, one end of the gas outlet part away from the gas inlet-outlet adapter extends into the gas storage cavity, and a gas outlet hole is provided in the gas outlet part.

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

[0019] The application provides an auxiliary flow guide for protective gas, which is used in cooperation with a welding gun body with a tungsten electrode, and specifically comprises a gas storage surrounding part, which is fixedly sleeved on the periphery of the welding gun body, and a gas storage cavity with an outlet is formed between the inner wall of the gas storage surrounding part and the outer wall of the welding gun body, the gas storage cavity is supplied with protective gas through a gas supply assembly, and a gas screen is fixedly arranged in the outlet of the gas storage cavity, so that the protective gas in the storage cavity can be converted into a dense stream guided out of the outlet. In addition, a nozzle clamp is arranged on the outer side of the gas storage surrounding part, a gap is formed between the nozzle clamp and the gas storage surrounding part, a nozzle for guiding the protective gas can be installed in the gap and can move along the extension direction of the gap, the nozzle covers the outlet of the gas storage cavity, the gas outlet of the nozzle is arranged towards the tungsten electrode, and when the flow of the protective gas is insufficient or in the scene of welding of a deep groove, the gap extends along the axial direction of the tungsten electrode, so that the nozzle can be moved and adjusted along the axial direction of the tungsten electrode according to actual needs, the length of a flow guide air channel formed between the nozzle and the welding gun body is adjusted, the effective range of the dense protective gas guided out of the flow guide air channel is adjusted, the protective gas guided out of the flow guide air channel is closer to the tungsten electrode and can flow towards the tungsten electrode, the welding pool and the weld of the position to be welded are effectively protected, and the welding quality is ensured

[0020] In another aspect, the application also provides a welding device, which comprises a welding gun body and the auxiliary flow guide for protective gas.

[0021] The welding device provided by the application has the same beneficial effects as the auxiliary flow guide for protective gas. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A sectional view of the auxiliary flow guide for protective gas in the embodiment of the application is shown;

[0023] Figure 2 A perspective view of the auxiliary flow guide for protective gas in the embodiment of the application is shown;

[0024] Figure 3 A structural schematic view of the nozzle clamp in the embodiment of the application is shown;

[0025] Figure 4 A structural schematic view of the nozzle clamp in the embodiment of the application is shown; Figure 3 An enlarged structural schematic view of position A in FIG. 4 is shown;

[0026] Figure 5 A structural schematic view of the gas storage surrounding part in the embodiment of the application is shown;

[0027] Figure 6 A structural schematic view of the gas shunt in the embodiment of the application is shown.

[0028] Reference Signs List:

[0029] 1. nozzle clamp; 101, nozzle clamp base; 102, clamping strip; 2, nozzle; 3, gas storage fence; 4, gas screen; 5, gas guide splitter; 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 wire; 13, friction part; 14, central notch; 15, through hole; 16, gas inlet connecting hole; 17, gas outlet hole; 18, threaded hole. DETAILED DESCRIPTION

[0030] In order to make the above 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.

[0031] In the description of the present specification, the description of the terms "embodiment", "one embodiment" and "one implementation" and the like 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 application. In the present specification, the illustrative description 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 in the drawings, in one aspect, the embodiment of the present application proposes an auxiliary gas flow guide for protective gas, which is used in cooperation with a welding gun body 10, the end of the welding gun body 10 is provided with a tungsten electrode 9, which is used for tungsten inert gas welding, also known as TIG welding, the correct connection mode 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 flow guide comprises:

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

[0035] Specifically, the gas storage enclosure 3 can be provided as a center-through cylindrical structure, the center-through part is just used for embedding the welding torch body 10, and the top of the gas storage enclosure 3 can be fixed by interference fit along the periphery of the welding torch body 10, so as to realize that the gas storage enclosure 3 is fixedly sleeved on the periphery of the welding torch 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 torch body 10, the end face of the hydrogen storage cavity away from the tungsten electrode 9 is sealed, the outlet can be provided on the end face close to the tungsten electrode 9, the side of the hydrogen storage cavity is kept sealed, and in general, the gas storage enclosure 3 has a function similar to “enclosure”, which forms the gas storage cavity together with the outer wall of the welding torch body 10, so that the protection gas can flow along the outer wall of the welding torch body 10 to the tungsten electrode 9 after being discharged from the outlet.

[0036] The gas screen 4 is fixedly arranged at the outlet of the gas storage cavity.

[0037] Specifically, the gas screen 4 can “screen” the gas flow in the storage cavity into a dense fine flow, so as to improve the uniformity of the discharge of the protection gas.

[0038] The gas supply assembly is connected with the gas storage cavity and used for supplying the protection gas to the gas storage cavity.

[0039] Specifically, the gas supply assembly can supply the protection gas with a certain pressure from the outside to the gas storage cavity, and the protection gas is inert gas such as argon.

[0040] The nozzle clamp 1 is fixedly arranged outside 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 axis direction of the tungsten electrode 9.

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

[0042] The nozzle 2 is sleeved outside the gas storage enclosure 3, is in plug-in fit with the gap and can move along the extension direction of the gap, and the other end extends towards the tungsten electrode 9 and is provided with a gas outlet, so that the protection gas can flow to the discharge position of the tungsten electrode 9 via the outlet of the gas storage cavity.

[0043] Specifically, since the gap extends along the axial direction of the tungsten electrode 9, the part where the nozzle 2 is mounted is arranged in a section of the gap, that is, the gas inlet end can be slid by external force, such as by arranging a driving mechanism, such as a lead screw linear driving mechanism, to slide the nozzle 2 along the gap, or the nozzle clamp 1 can be configured to have elasticity with the contact part of the nozzle 2, to achieve elastic clamping of the nozzle 2, and a flow guide air channel is formed between the nozzle 2 and the welding torch body 10, and obviously the inlet of the flow guide air channel is the outlet of the gas storage chamber, and the gas outlet of the nozzle 2 is arranged towards the tungsten electrode 9, and the nozzle 2 can be designed as follows: the extension range of the outlet of the flow guide air channel can cover the discharge tip of the tungsten electrode 9, so that the protective gas guided in the flow guide air channel flows to the discharge position of the tungsten electrode 9, thereby forming protection around the arc discharge of the tungsten electrode 9 and the welding pool at the welding position.

[0044] The auxiliary flow guide device for protective gas provided by the embodiment is used in cooperation with the welding torch body 10 with the tungsten electrode 9, and specifically includes a gas storage enclosure 3 which is fixedly sleeved on the periphery of the welding torch 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 torch body 10, the gas storage chamber is supplied with protective gas through a gas supply assembly, and a gas screen 4 is fixedly arranged in the outlet of the gas storage chamber, so that the protective gas in the storage chamber can be converted into a dense stream guided 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 the gap formed between the nozzle clamp 1 and the gas storage enclosure 3, the nozzle 2 for guiding the protective gas can be mounted through the gap and can move along 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 towards the tungsten electrode 9. In the case of insufficient protective gas flow, or in the case of deep groove welding, since the gap extends along the axial direction of the tungsten electrode 9, the nozzle 2 can be moved along the axial direction of the tungsten electrode 9 according to actual needs, so that the length of the flow guide air channel formed between the nozzle 2 and the welding torch body 10 is adjusted, thereby adjusting the action range of the dense protective gas guided from the flow guide air channel, so that the protective gas guided from the flow guide air channel is closer to the tungsten electrode 9 and can flow towards the tungsten electrode 9, so as to effectively protect the welding pool and the welding bead at the welding position, and ensure the welding quality.

[0045] As an optional embodiment of the present application, the nozzle 2 can be tapered along the direction of the outflow of the protective gas, and the gas outlet of the nozzle 2 is inwardly reduced in size towards the welding torch body 10, so as to form a flow guide air channel with a size that tends to decrease between the nozzle 2 and the welding torch body 10, so as to avoid interference of the flow guide air channel with the welding operation.

[0046] In addition, the nozzle 2 is made of high-temperature-resistant glass, and the end of the tungsten electrode 9 is not blocked by the nozzle 2, so that the welding process can be observed.

[0047] As shown in Figure 1 , Figure 2 and Figure 3 , as an optional embodiment of the present application, the nozzle clamp 1 is made of elastic material, and the nozzle clamp 1 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 barrier 3, one end of the clamping strip 102 is fixedly connected with the nozzle clamp base 101, and the other end is a free end and extends towards the direction close to the tungsten electrode 9, the gap is formed between the clamping strip 102 and the outer wall of the gas storage barrier 3, and the width of the gap is smaller than the wall thickness of the nozzle 2.

[0048] Specifically, the nozzle clamp base 101 is annular, the inner ring of the annular structure is used for embedding the welding gun body 10, and the outer ring is used for fixing the clamping strip 102. The nozzle clamp 1 can be integrally formed. When the gas storage barrier 3 is installed, the top of the gas storage barrier 3 is aligned with the gap, and then the gas storage barrier 3 is inserted along the gap between the inner wall of the free end of the clamping strip 102 and the outer wall of the gas storage barrier 3, and the length of the nozzle 2 exposed outside is selected. Under the action of the elastic force of the clamping strip 102, the gas storage barrier 3 is clamped in the gap. When the clamping strip 102 is in a free state, the width of the gap is smaller than the wall thickness of the nozzle 2, so that after the gas storage barrier 3 is installed, the clamping strip 102 is always in an outwardly expanded state, and thus the pressure on the outer wall of the gas storage barrier 3 always exists. The nozzle clamp base 101 can be made of plastic.

[0049] In this optional embodiment, the length of the nozzle 2 exposed at the bottom can be adjusted as required by pulling the nozzle 2 along the axis direction of the tungsten electrode 9.

[0050] As shown in Figure 1 , Figure 2 and Figure 3 , as an optional embodiment of the present application, the nozzle clamp base 101 is annular, and the clamping strip 102 is strip-shaped. When a plurality of clamping strips 102 are provided, the plurality of clamping strips 102 are uniformly distributed on the periphery of the gas storage barrier 3, and a spacing is provided between adjacent two clamping strips 102.

[0051] Briefly, the clamping strip 102 is in the form of a comb.

[0052] Specifically, the plurality of clamping strips 102 are circumferentially arranged, that is, a ring of clamping strips 102 is arranged along the outer edge of the nozzle holder 101, so that the plurality of clamping strips 102 can collectively clamp the gas storage surrounding stopper 3, improving the closing effect. The purpose of providing a spacing between adjacent two clamping strips 102 is to prevent the clamping strips 102 from affecting each other during closing and opening, and to make the plurality of clamping strips 102 expand synchronously after the gas storage surrounding stopper 3 is installed, so as to collectively wrap the top section of the gas storage surrounding stopper 3 tightly.

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

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

[0055] Specifically, the friction part 13 can be provided with at least one, and each inner wall of the nozzle holder 101 is provided with one. The friction part 13 is preferably arranged transversely. In this way, when the clamping strip 102 closes to tightly clamp the gas storage surrounding stopper 3, the clamping effect on the gas storage surrounding stopper 3 is ensured, and the state after clamping is maintained, the installation effect of the gas storage surrounding stopper 3 is improved, the stable gas flow is realized, and the position will not be loose due to the gas flow.

[0056] As Figure 1 shown, as an optional embodiment of the present application, the gas storage cavity, the gas outlet of the nozzle 2 and the welding gun body 10 are concentrically arranged, one end face of the gas storage surrounding stopper 3 towards 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 cavity.

[0057] Specifically, the outlet surrounds the welding gun body 10 towards the tungsten electrode 9 side, so that the shielding gas can flow from the storage cavity 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 be tightly surrounded around the arc and the position to be welded, blocking air. The porous structure constitutes the outlet, which is characterized by that a plurality of holes are formed in the bottom end face of the gas storage surrounding stopper 3, that is, a porous structure is formed. The size of the hole diameter can be comparable to that of the gas screen 4, or slightly larger, which can be set according to actual needs. After the shielding gas passes through the gas screen 4 and the porous structure from the gas storage cavity, a dense surrounding gas flow is formed.

[0058] In the optional embodiment, the gas storage cavity is arranged concentrically with the welding torch body 10, the outlet of the gas storage cavity, which is the protection gas outlet surface, is processed into a porous structure, the uniformity of the protection gas flow is controlled, and the tungsten electrode 9 is surrounded to improve the air isolation effect at the melting point of the tungsten electrode 9.

[0059] As shown in Figure 1 and Figure 5 , as an optional embodiment of the present application, the gas screen 4 is in a ring structure, the outer and inner circumferential surfaces thereof are in contact with the inner wall of the gas storage surrounding stopper 3 and the outer wall of the welding torch body 10 respectively, one side surface of the gas screen 4 is attached to the end surface of the gas storage surrounding stopper 3 facing the tungsten electrode 9, and the other side surface is in abutment with the fixing assembly provided on the gas storage surrounding stopper 3.

[0060] In the optional embodiment, the gas screen 4 can be manufactured by stacking multiple layers of stainless steel mesh and welding, which promotes the uniform pressure of the protection gas introduced by the gas guide and shunt 5 in the gas storage cavity, thereby controlling the uniformity of the protection gas flow. The gas screen 4 can also be made of non-metallic or metallic materials. After determining the mesh number of the gas guide and shunt 5, half or the entire mesh of the processed gas guide and shunt 5 is loaded into the gas storage cavity and arranged on the porous structure, that is, the porous structure plays a supporting role. The gas screen 4 is provided with one or more layers and is fixed relative to the gas storage surrounding stopper 3 by means of the fixing assembly.

[0061] As shown in Figure 2 , Figure 3 and Figure 4 , as an optional embodiment of the present application, the fixing assembly includes a fixing stud 6, a threaded hole 18 is provided through the gas storage surrounding stopper 3, a through hole 15 is provided through the nozzle clamp base body 101, one end of the fixing stud 6 extends into the gas storage cavity after passing through the through hole 15 and the threaded hole 18 and abuts against the surface of the gas screen 4, the other end of the fixing stud 6 protrudes from the nozzle clamp base body 101, and the fixing stud 6 is threadedly connected with the threaded hole 18.

[0062] Specifically, the bottom end of the fixing stud 6 passes through the through hole 15 on the end surface of the nozzle clamp 1, is screwed into the gas storage cavity through the threaded hole 18 on the upper end surface of the gas storage surrounding stopper 3, and abuts against the surface of the gas screen 4 to fix the gas screen 4. The other end of the fixing stud 6 protrudes from the nozzle clamp base body 101, so that the fixing stud 6 can be tightened and loosened by rotating. In addition, the other end of the fixing stud 6 can be provided with a notch, for example, a slot, for tool operation.

[0063] In the optional embodiment, the gas screen 4 is fixed by the fixing assembly, and the gas screen 4 is limited in the outlet of the gas storage cavity, so that the protective gas can form a dense gas flow acting on the discharge position of the tungsten electrode 9.

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

[0065] As shown in Figure 2 As an optional embodiment of the present application, the fixing assembly is also used for fixing the nozzle holder 1, and the fixing assembly further comprises a compression nut 7 which is used for abutting against the surface of the nozzle holder base 101 after being screwed with the other end of the fixing stud 6.

[0066] Specifically, the fixing assembly is also used for fixing the nozzle holder 1, realizing detachable installation of the nozzle holder 1 based on the welding gun body 10, the exposed end of the fixing stud 6 is located at the top end of the nozzle holder base 101, and abuts against the surface of the nozzle holder base 101 after being screwed by the compression nut 7, realizing compression of the nozzle holder 1 on the gas storage fence 3.

[0067] As shown in Figure 2 It should be noted that the fixing stud 6 can be provided in multiple, realizing uniform fixing of the gas screen 4 and the nozzle holder 1, and avoiding single-point stress.

[0068] In the optional embodiment, the position of the welding gun body 10 can be fixed by further utilizing the fixing stud 6 of the fixing assembly in cooperation with the compression nut 7, and thus the fixing stud 6 realizes fixing of the gas screen 4 and the nozzle holder 1 at the same time.

[0069] As shown in Figure 1 and Figure 6 As an optional embodiment of the present application, the gas supply assembly comprises a gas guide shunt 5 and an external gas supply pipe 11, the gas guide shunt 5 comprises a gas inlet part 501, a gas inlet-outlet adapter part 502 and a gas outlet part 503 which are hollowly arranged respectively, the gas inlet part 501 and the gas outlet part 503 are communicated through the gas inlet-outlet adapter part 502, the gas inlet part 501 is used for externally connecting the external gas supply pipe 11, one end of the gas outlet part 503 away from the gas inlet-outlet adapter part 502 extends into the gas storage cavity, and a gas flow-out hole 17 is arranged on the gas outlet part 503.

[0070] A central gap 14 is arranged at the center of the nozzle holder base 101 for exposing the head of the welding gun body 10, and a gas inlet connecting hole 16 is arranged on the nozzle holder base 101 for the gas guide shunt 5 to pass through.

[0071] Specifically, the distal end of the external gas supply pipe 11 is connected to an external gas cylinder, and the proximal end of the external gas supply pipe 11 is connected to the air inlet 501. The inlet-outlet transition part 502 connects the air inlet 501 and the air outlet 503. The entire gas guide and diverter 5 can be right-angled. The main purpose of the inlet-outlet transition 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 gas guide and diverter 5 passes through the nozzle clamp 1 and the gas storage enclosure 3 to enter the gas storage chamber. At the penetration position of the gas guide and diverter 5 on the nozzle clamp 1 and the gas storage enclosure 3, a corresponding seal can be set to improve the sealing performance.

[0072] In this optional embodiment, the gas diverter 5 can supply gas from one side of the top of the nozzle clamp 1 without hindering the use of welding, thereby achieving a stable gas supply.

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

[0074] Specifically, the outflow direction of the protective gas flowing out through the gas outlet 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 protective gas directly leaving from the outlet. Instead, it is buffered in the gas storage cavity through a certain path. The gas outlet 503 can be set as a tube, with multiple gas outlet holes 17 symmetrically opened along the radial direction of the gas outlet 503. There are no gas outlet holes in the axial direction, so that the protective gas enters the gas storage cavity from the side, controls the gas pressure in the gas storage cavity to be uniform, thereby controlling the uniformity of the protective gas outflow and improving the protective effect of the protective gas on welding.

[0075] On the other hand, the present invention also provides a welding apparatus, including a welding torch body 10 and an auxiliary guide for the protective gas as described in any of the above embodiments.

[0076] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily 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 invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

[0077] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. An auxiliary gas deflector for use in cooperation with a welding torch body (10) having a tungsten electrode (9) at its distal end, characterized in that, The auxiliary flow guide of the shielding gas comprises: a gas storage enclosure (3) fixedly sleeved on the periphery of the welding torch body (10), an inner wall of the gas storage enclosure (3) and an outer wall of the welding torch body (10) forming a gas storage cavity, one end of the gas storage cavity towards the tungsten electrode (9) having an outlet; a gas screen (4) fixedly arranged at the outlet of the gas storage cavity; a gas supply assembly in communication with the gas storage cavity for supplying shielding gas to the gas storage cavity; a nozzle clamp (1) fixedly arranged outside the gas storage enclosure (3), the nozzle clamp (1) and the gas storage enclosure (3) forming a gap therebetween, the gap extending along the axial direction of the tungsten electrode (9); a nozzle (2) one end of the nozzle (2) sleeved outside the gas storage enclosure (3) and insertedly fitted with the gap and movable along the extending direction of the gap, the other end of the nozzle (2) extending towards the tungsten electrode (9) and provided with a gas outlet; the nozzle clamp (1) is made of elastic material, the nozzle clamp (1) comprising a nozzle clamp base body (101) and a clamping strip (102), the nozzle clamp base body (101) being annular and fixedly sleeved outside the gas storage enclosure (3), one end of the clamping strip (102) fixedly connected with the nozzle clamp base body (101), the other end of the clamping strip (102) being a free end and extending towards the direction close to the tungsten electrode (9), the clamping strip (102) and the outer wall of the gas storage enclosure (3) forming the gap therebetween, the width of the gap being smaller than the wall thickness of the nozzle (2), a plurality of the clamping strips (102) being evenly distributed on the periphery of the gas storage enclosure (3) and a spacing being provided between adjacent two of the clamping strips (102); the gas screen (4) being annular in structure, the outer peripheral surface and the inner peripheral surface of the gas screen (4) being in contact with the inner wall of the gas storage enclosure (3) and the outer wall of the welding torch body (10) respectively, one side surface of the gas screen (4) abutting against the end surface of the gas storage enclosure (3) towards the tungsten electrode (9), the other side surface of the gas screen (4) abutting against the fixing assembly provided on the gas storage enclosure (3).

2. The shield gas assist flow conditioner of claim 1, wherein, a friction portion (13) is provided on the inner wall of the clamping strip (102).

3. The shield gas assist flow conditioner of claim 1, wherein, the gas storage cavity, the gas outlet of the nozzle (2) and the welding torch body (10) are concentrically arranged, the end surface of the gas storage enclosure (3) towards the tungsten electrode (9) is provided with a porous structure, the porous structure being distributed around the welding torch body (10) to form the outlet of the gas storage cavity.

4. The shield gas assist flow conditioner of claim 1, wherein, the fixing assembly comprises a fixing stud (6), a threaded hole (18) is provided through the gas storage enclosure (3), a through hole (15) is provided through the nozzle clamp base body (101), one end of the fixing stud (6) extending into the gas storage cavity through the through hole (15) and the threaded hole (18) and abutting against the surface of the gas screen (4), the other end of the fixing stud (6) exposed from the nozzle clamp base body (101), the fixing stud (6) threadedly fitted with the threaded hole (18).

5. The shield gas assist flow conditioner of claim 4, wherein, The fixing assembly further comprises a compression nut (7) for abutting against the surface of the nozzle clamp base body (101) after being screwed with the other end of the fixing stud (6).

6. The shroud of any one of claims 1-3, wherein, The gas supply assembly comprises a gas guide shunt (5) and an external gas supply pipe (11), the gas guide shunt (5) comprises a hollowly arranged gas inlet part (501), a gas inlet-outlet adapter (502) and a gas outlet part (503) respectively, the gas inlet part (501) and the gas outlet part (503) are communicated through the gas inlet-outlet adapter (502), the gas inlet part (501) is used for externally connecting the external gas supply pipe (11), one end of the gas outlet part (503) away from the gas inlet-outlet adapter (502) extends into the gas storage cavity, and a gas outlet hole (17) is formed in the gas outlet part (503).

7. The shield gas assist flow conditioner of claim 6, wherein, The outflow direction of the protective gas flowing out through the gas outlet hole (17) is not perpendicular to the surface of the gas screen (4).

8. A welding device characterized by, The protective gas auxiliary flow guide comprises a welding torch body (10) and the protective gas auxiliary flow guide as claimed in any one of claims 1-7.

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