Adjusting tool applied to welding head of pipe fitting TIG (Tungsten Inert Gas) welding

Abstract

The invention discloses an adjusting tool applied to a pipe fitting TIG welding head, and relates to the technical field of pipe fitting welding equipment.The adjusting tool comprises an atmosphere adjusting block, the atmosphere adjusting block is a circular block with the upper end closed, and a first atmosphere outlet, a second atmosphere outlet and a third atmosphere outlet are formed in the lower end of the atmosphere adjusting block; the first atmosphere outlet is formed in the middle of the atmosphere adjusting block, the second atmosphere outlet is annularly formed in the peripheral side of the first atmosphere outlet, and the third atmosphere outlet is annularly formed in the peripheral side of the second atmosphere outlet. The TIG welding machine head is simple in structure and convenient to use, can meet the welding requirements of pipe walls with different thicknesses on the basis of not wasting inert atmosphere, is higher in flexibility during use, can improve the welding quality of pipe fittings with different wall thicknesses, expands the application range of an existing TIG welding machine head for pipe fittings, has great improvement significance, reduces the production cost and is suitable for comprehensive popularization and use.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe welding equipment, and in particular to an adjusting tool used for a pipe TIG welding machine head. Background Art

[0002] Traditional TIG welding has a low degree of automation and limited welding efficiency. The position of the argon arc welding gun is relatively fixed and cannot be flexibly swung and angle adjusted. Welding defects often occur, resulting in poor weld quality.

[0003] To solve the above problems, the patent document with the publication number "CN213497085U" discloses an automatic rotating TIG welding head adjustment device, including a mounting plate, on which an electric slide is connected, one side of the electric slide is connected to a universal oscillator, the universal oscillator is vertically connected to an L-shaped fixed seat, and the lower part of the fixed seat is connected to a rotating device; the rotating device includes a mutually cooperating electric device and a hollow rotating platform; the proximity switch at the lower end of the fixed seat cooperates with the metal screw on the rotating plate, and a TIG welding head is fixed on the rotating plate. The advantages are to improve the degree of automated welding, realize a wider range of weld width control, improve welding efficiency, improve the weld surface, reduce welding defects, and realize the swing and angle adjustment of the welding head.

[0004] Based on the above search and in combination with the prior art, it is found that in the prior art, the protection range of the inert atmosphere for the tungsten electrode is usually fixed, and the size of the protection area and the shape of the protection range are unchanged. The unchanged protection range of the inert atmosphere leads to the position and size of the molten pool being basically fixed. In actual use, due to the different wall thicknesses of the welded pipes, it is necessary to change the weld depth. For example, when welding thin-walled pipes, it is necessary to make the welding section fit the outside of the weld to form a thinner welding section, thereby reducing the local deformation of the pipe after welding and improving the welding accuracy. When welding thick-walled pipes, it is required that the welding section is thicker to form a stable welding product and avoid cracks caused by the thick weld. The existing single pipe TIG welding head obviously cannot meet the welding requirements of pipes with different wall thicknesses, so that a variety of pipe TIG welding equipment needs to be introduced during processing, which increases the production cost. Therefore, an adjustment tooling for the pipe TIG welding head is required. Summary of the invention

[0005] The purpose of the present application is to provide an adjustment tool for a pipe TIG welding head to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: an adjustment tooling for a pipe TIG welding head, comprising:

[0007] The atmosphere regulating block is a circular block with a closed upper end, and a first atmosphere outlet, a second atmosphere outlet and a third atmosphere outlet are provided at the lower end of the atmosphere regulating block. The first atmosphere outlet is provided in the middle of the atmosphere regulating block, the second atmosphere outlet is provided in a ring around the first atmosphere outlet, and the third atmosphere outlet is provided in a ring around the second atmosphere outlet;

[0008] A sealing insert and an air inlet pipe are fixed to the upper end of the atmosphere adjustment block. The sealing insert is used for inserting the tungsten electrode of the welding machine head. The sealing insert is also used to separate the inert atmosphere body so that the inert atmosphere body is located outside the sealing insert. A plurality of air inlet pipes are provided and are respectively connected to the upper ends of the first atmosphere outlet, the second atmosphere outlet and the third atmosphere outlet;

[0009] A connecting ring is also fixed to the upper end of the atmosphere adjustment block. The connecting ring is fixedly sleeved on the end of the atmosphere output pipe of the welding machine head to form a seal. A cavity for entering the inert atmosphere is formed between the inner side of the connecting ring and the outer side of the sealing insert. The upper ends of the multiple air inlet pipes are connected to the cavity.

[0010] Among them, the inert atmosphere sprayed from the first atmosphere outlet has the smallest flow range and fits the tip of the tungsten electrode, the inert atmosphere sprayed from the second atmosphere outlet has a larger flow range and forms a bottom outward expansion protection area, the inert atmosphere sprayed from the third atmosphere outlet has the largest flow range and forms a trumpet-shaped protection area, and the inert atmosphere sprayed from the third atmosphere outlet extends to the inside of the weld;

[0011] An adjusting mechanism for controlling the opening and closing of multiple air inlet pipes is also installed on the upper end of the atmosphere adjusting block.

[0012] As a further supplement to this solution, the cross-section of the first atmosphere outlet is a frustum-shaped shape that is larger at the top and smaller at the bottom, the cross-section of the second atmosphere outlet is a slightly expanded shape with the lower end inclined toward the tungsten pole axis, and the cross-section of the third atmosphere outlet is a slightly narrowed shape with the lower end inclined away from the tungsten pole axis.

[0013] As a further supplement to this scheme, the regulatory agencies include:

[0014] The sealing cover is arranged at the upper end of the air inlet pipe and closes the upper end opening of the air inlet pipe. A push rod is fixed on one side of the sealing cover. The end of the push rod away from the sealing cover slides through the connecting ring and extends to the outside of the connecting ring.

[0015] Wherein, a plurality of sealing covers are provided and correspond one to one with the plurality of air inlet pipes respectively;

[0016] The position limiting and resetting assembly is used to adjust the positions of multiple covers so that one of the covers is separated from one of the air inlet pipes and other covers close other air inlet pipes.

[0017] As a further supplement to this solution, the limit and reset components include:

[0018] A first fixing plate, the first fixing plate is fixed to the top of the atmosphere adjustment block, and the first fixing plate is located on a side of the cover away from the push rod;

[0019] An adjusting card plate is used to clamp a plurality of push rods and limit the push rods. The adjusting card plate only clamps one of the push rods at a time. When the adjusting card plate clamps one of the push rods, the cover corresponding to the push rod is separated from the air intake pipe;

[0020] A second fixing plate, the lower end of which is fixed to the top of the atmosphere adjustment block, and the second fixing plate is located on one side of the adjustment card plate;

[0021] There are several return springs, which correspond to the multiple covers and the adjusting card plate respectively. The multiple covers are elastically connected to the first fixed plate through the return springs, and the adjusting card plate is also elastically connected to the second fixed plate through the return springs.

[0022] As a further supplement to this solution, a limit clamping rod extending vertically downward is fixed to the lower end of the push rod;

[0023] The adjusting card plate is provided with a card slot, a guide opening and a through slot, the card slot is connected with the guide opening through the through slot, one side of the guide opening forms an inclined side wall, and the inclined side wall of the guide opening corresponds to the position of the limit card rod;

[0024] The clamping slot is clamped and adapted with the limiting clamping rod, the through slot allows the limiting clamping rod to slide through, and the opening of the guide opening faces one side of the limiting clamping rod.

[0025] As a further supplement to the present solution, a sealing ring is fixed inside the sealing insert, and the inner wall of the sealing ring is interference fit with the peripheral side of the tungsten electrode, so that the inert atmosphere cannot pass through the sealing insert.

[0026] In summary, the technical effects and advantages of the present invention are as follows:

[0027] 1. In the present invention, by adding the adjustment tooling applied to the TIG welding head for pipe fittings, the existing TIG welding head for pipe fittings can be improved, so that it can adapt to the welding needs of pipe walls of different thicknesses without wasting inert atmosphere, and it is more flexible when used, and can improve the welding quality of pipe fittings with different wall thicknesses, thereby expanding the application scope of the existing TIG welding head for pipe fittings, having great improvement significance, reducing production costs, and being suitable for comprehensive promotion and use.

[0028] 2. In the present invention, through the setting of the adjustment mechanism, when the staff pushes one of the push rods, the push rod drives the limit card rod and the cover to move synchronously, the cover leaves the air inlet pipe to open the air inlet pipe, and the other two covers are still in a closed state. At the same time, the limit card rod abuts against the inclined side wall of the guide opening, and the adjustment card plate overcomes the elastic force of the reset spring to produce a lateral displacement. When the limit card rod enters the card slot through the through slot, the adjustment card plate loses the pressure applied by the limit card rod and resets under the elastic force of the reset spring, so that the limit card rod is clamped in the card slot and is limited;

[0029] Afterwards, if the staff pushes another push rod, the other push rod drives another limit clamping rod and another cover to move synchronously. At this time, the other cover is opened. At the same time, the other limit clamping rod abuts against the inclined side wall of the guide opening, and the adjustment clamping plate overcomes the elastic force of the reset spring to produce a lateral displacement. When the other limit clamping rod enters the clamping slot through the through slot, one of the push rods originally clamped in the clamping slot loses the restraining force of the clamping slot and is reset under the elastic action of the reset spring, and the adjustment clamping plate is also reset under the action of the reset spring, so that the other push rod is clamped in the clamping slot.

[0030] When the staff opens any one of the covers, the other two covers will be closed, thereby achieving the effect of switching and opening multiple air inlet pipes, and finally achieving the effect of switching and spraying the inert atmosphere from the first atmosphere outlet, the second atmosphere outlet and the third atmosphere outlet, meeting the welding requirements of pipes with different wall thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 Schematic diagram of the three-dimensional structure in this embodiment;

[0033] Figure 2 is a schematic cross-sectional structural diagram of the atmosphere adjustment block in this embodiment;

[0034] Figure 3 Schematic diagram of the top view of the structure in this embodiment;

[0035] Figure 4 Schematic diagram of the structure of the adjustment card plate in this embodiment;

[0036] Figure 5 Schematic diagram of the weld cross section and atmosphere protection range of a pipe with normal wall thickness in this embodiment;

[0037] Figure 6 Schematic diagram of the weld cross section and atmosphere protection range structure of the thin-walled pipe in this embodiment;

[0038] Figure 7 Schematic diagram of the weld cross section and atmosphere protection range structure of the thick-walled pipe in this embodiment.

[0039] In the figure: 1. atmosphere adjustment block; 11. first atmosphere outlet; 12. second atmosphere outlet; 13. third atmosphere outlet; 2. connecting ring; 3. sealing insert; 31. sealing ring; 4. air inlet pipe; 5. sealing cover; 51. push rod; 52. limit clamping rod; 6. first fixed plate; 7. adjusting clamping plate; 71. clamping groove; 72. guide opening; 73. through groove; 8. second fixed plate; 9. reset spring. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example: Reference Figure 1-3 The adjustment tool for a TIG welding head of a pipe fitting shown in the figure comprises:

[0042] The atmosphere regulating block 1 is a circular block with a closed upper end, and a first atmosphere outlet 11, a second atmosphere outlet 12 and a third atmosphere outlet 13 are provided at the lower end of the atmosphere regulating block 1. The first atmosphere outlet 11 is provided in the middle of the atmosphere regulating block 1, the second atmosphere outlet 12 is provided around the first atmosphere outlet 11, and the third atmosphere outlet 13 is provided around the second atmosphere outlet 12;

[0043] A sealing insert 3 and an air inlet pipe 4 are fixed to the upper end of the atmosphere adjustment block 1. The sealing insert 3 is used for inserting the tungsten electrode of the welding machine head. The sealing insert 3 is also used to separate the inert atmosphere body so that the inert atmosphere body is located outside the sealing insert 3. A plurality of air inlet pipes 4 are provided and are respectively connected to the upper ends of the first atmosphere outlet 11, the second atmosphere outlet 12 and the third atmosphere outlet 13;

[0044] A connecting ring 2 is also fixed to the upper end of the atmosphere adjustment block 1. The connecting ring 2 is fixedly sleeved on the end of the atmosphere output pipe of the welding machine head. The atmosphere output pipe adopts the atmosphere output pipe commonly used in the prior art and sleeved on the periphery of the tungsten electrode tube. The end thereof is connected with an inflating device of a slightly positive pressure atmosphere to ensure that the inert atmosphere (argon gas) in the atmosphere output pipe has a certain pressure, can form a sprayed protective atmosphere, ensure its protective effect, and form a seal. A cavity for entering the inert atmosphere is formed between the inner side of the connecting ring 2 and the outer side of the sealing insert 3, and the upper ends of multiple air inlet pipes 4 are all connected to the cavity;

[0045] Among them, the inert atmosphere sprayed from the first atmosphere outlet 11 has the smallest flow range and fits the tip of the tungsten electrode, the inert atmosphere sprayed from the second atmosphere outlet 12 has a larger flow range and forms a bottom outward expansion protection area, the inert atmosphere sprayed from the third atmosphere outlet 13 has the largest flow range and forms a trumpet-shaped protection area, and the inert atmosphere sprayed from the third atmosphere outlet 13 extends to the inside of the weld;

[0046] An adjusting mechanism for controlling the opening and closing of a plurality of air inlet pipes 4 is also installed on the upper end of the atmosphere adjusting block 1 .

[0047] Based on the above structure, when in use, the staff can directly install the adjustment tool on the TIG welding head, so that the connecting ring 2 is fixedly sleeved on the end of the atmosphere output pipe of the welding head to form a seal. The connecting ring 2 and the end of the atmosphere output pipe of the welding head can be connected in various forms such as welding, clamping, and screwing. It can be selected according to the needs of actual use to achieve the purpose of fixed connection and forming a seal. At the same time, the tungsten electrode is inserted into the sealing insert 3 and fits tightly with the inner wall of the sealing insert 3 to also form a seal, so that the inert atmosphere exists in the cavity formed between the inner side of the connecting ring 2 and the outer side of the sealing insert 3 after output. At this time, the staff can control the opening and closing of multiple air inlet pipes 4 through the adjustment mechanism;

[0048] When the air inlet pipe 4 corresponding to the first atmosphere outlet 11 is opened, and the air inlet pipes 4 corresponding to the second atmosphere outlet 12 and the third atmosphere outlet 13 are closed, the inert atmosphere is discharged from the first atmosphere outlet 11, and a small protective area (such as tungsten electrode) is formed outside the tungsten electrode. Figure 6 As shown in the figure, a thinner welding section can be formed when welding thin-walled pipe fittings, which can be adapted to the thin-walled pipe fittings. At the same time, the molten pool is close to the outer layer of the thin-walled pipe fittings, so that the weld after welding forms a thinner weld body that fits the thin-walled pipe fittings on both sides, which can improve the accuracy of welding thin-walled pipe fittings and improve the welding quality of thin-walled pipe fittings when using the TIG welding head;

[0049] When the air inlet pipe 4 corresponding to the second atmosphere outlet 12 is opened, and the air inlet pipes 4 corresponding to the first atmosphere outlet 11 and the third atmosphere outlet 13 are closed, the inert atmosphere is discharged from the second atmosphere outlet 12, and a large protection area with an expanded bottom is formed outside the tungsten electrode (such as Figure 5 As shown), when welding pipes of conventional thickness, the molten pool is relatively located in the middle of the pipe wall section, forming a thicker section that is basically full of welds, which can be adapted to pipes of conventional thickness. At the same time, it can meet the welding quality requirements when welding pipes, and ensure the welding quality of pipes of conventional thickness when welding using the TIG welding head;

[0050] When the air inlet pipe 4 corresponding to the third atmosphere outlet 13 is opened, and the air inlet pipes 4 corresponding to the first atmosphere outlet 11 and the second atmosphere outlet 12 are closed, the inert atmosphere is discharged from the third atmosphere outlet 13, and a protective area with the largest flow range and a trumpet-shaped expansion is formed outside the tungsten electrode (such as Figure 7 As shown), at the same time, it is ensured that the lower end of the flow area of ​​the inert atmosphere extends between the two pipe walls, so that when welding thick-walled pipe fittings, the molten pool is relatively located on the inner side of the pipe wall section, forming a relatively concave welding body, and the welding section can basically fill the cross-sectional thickness of the weld to form a thicker and more stable welding body, which can be adapted to thick-walled pipe fittings. Compared with the prior art that requires inner layer welding first and then outer layer welding, the welding is formed in one step, and there is no possibility of delamination cracks after welding, the welding efficiency is higher, and the welding quality requirements when welding pipe fittings can be met by controlling the quality of the welding wire melt at each point, thereby ensuring the welding quality of thick-walled pipe fittings when welding using the TIG welding head;

[0051] By adding the adjustment tooling for the TIG welding head for pipe fittings, the existing TIG welding head for pipe fittings can be improved so that it can adapt to the welding needs of pipe walls of different thicknesses without wasting inert atmosphere. It is more flexible in use and can improve the welding quality of pipe fittings of different wall thicknesses, thereby expanding the application scope of the existing TIG welding head for pipe fittings. It has great improvement significance, reduces production costs, and is suitable for comprehensive promotion and use.

[0052] Furthermore, the cross-section of the first atmosphere outlet 11 is a frustum-shaped shape that is larger at the top and smaller at the bottom, so that the inert atmosphere can form a protection area with the smallest flow range and fit the tip of the tungsten electrode when it is ejected, the cross-section of the second atmosphere outlet 12 is a slightly expanded shape with the lower end inclined toward the axis of the tungsten electrode, so that the inert atmosphere can form a larger flow range and form a bottom outward-expanding protection area when it is ejected, and the cross-section of the third atmosphere outlet 13 is a slightly narrowed shape with the lower end inclined away from the axis of the tungsten electrode, so that the inert atmosphere can form a trumpet-shaped protection area with the largest flow range when it is ejected.

[0053] Further, combined with Figure 3-Figure 4 , the regulatory agencies include:

[0054] The cover 5 is disposed on the upper end of the air inlet pipe 4 and closes the upper end opening of the air inlet pipe 4. A push rod 51 is fixed to one side of the cover 5. The end of the push rod 51 away from the cover 5 slides through the connecting ring 2 and extends to the outside of the connecting ring 2.

[0055] There are multiple covers 5, which correspond to the multiple air inlet pipes 4 one by one.

[0056] The position limiting and resetting assembly is used to adjust the positions of the multiple covers 5 so that one of the covers 5 is separated from one of the air inlet pipes 4 and the other covers 5 close the other air inlet pipes 4 .

[0057] The limit and reset components include:

[0058] A first fixing plate 6, the first fixing plate 6 is fixed to the top of the atmosphere adjustment block 1, and the first fixing plate 6 is located on a side of the cover 5 away from the push rod 51;

[0059] The adjusting clamping plate 7 is used to clamp the plurality of push rods 51 and limit the push rods 51. The adjusting clamping plate 7 only clamps one of the push rods 51 at a time. When the adjusting clamping plate 7 clamps one of the push rods 51, the cover 5 corresponding to the push rod 51 is separated from the air inlet pipe 4;

[0060] A second fixing plate 8, the lower end of which is fixed to the top of the atmosphere adjustment block 1, and the second fixing plate 8 is located on one side of the adjustment card plate 7;

[0061] There are several return springs 9, which respectively correspond to the multiple covers 5 and the adjusting card plate 7. The multiple covers 5 are elastically connected to the first fixed plate 6 through the return springs 9, and the adjusting card plate 7 is also elastically connected to the second fixed plate 8 through the return springs 9.

[0062] A limit rod 52 extending vertically downward is fixed to the lower end of the push rod 51;

[0063] The adjusting card plate 7 is provided with a card slot 71, a guide opening 72 and a through slot 73. The card slot 71 is connected with the guide opening 72 through the through slot 73. An inclined side wall is formed on one side of the guide opening 72. The inclined side wall of the guide opening 72 corresponds to the position of the limit card rod 52.

[0064] The locking groove 71 is engaged and adapted with the limiting locking rod 52 , and the through groove 73 allows the limiting locking rod 52 to slide through, so that the opening of the guide opening 72 faces one side of the limiting locking rod 52 .

[0065] By setting the adjustment mechanism, when the staff pushes one of the push rods 51, the push rod 51 drives the limiting clamping rod 52 and the cover 5 to move synchronously, and the cover 5 leaves the air inlet pipe 4 so that the air inlet pipe 4 is opened, and the other two cover 5 are still in a closed state. At the same time, the limiting clamping rod 52 abuts against the inclined side wall of the guide opening 72, and the adjustment clamping plate 7 overcomes the elastic force of the return spring 9 to produce a lateral displacement. When the limiting clamping rod 52 enters the clamping groove 71 through the through groove 73, the adjustment clamping plate 7 loses the pressure applied by the limiting clamping rod 52 and is reset under the elastic force of the return spring 9, so that the limiting clamping rod 52 is clamped in the clamping groove 71 and is limited;

[0066] Afterwards, if the staff pushes another push rod 51, the other push rod 51 drives another limiting clamping rod 52 and another cover 5 to move synchronously. At this time, the other cover 5 is opened. At the same time, the other limiting clamping rod 52 abuts against the inclined side wall of the guide opening 72, and the adjusting clamping plate 7 overcomes the elastic force of the reset spring 9 to produce a lateral displacement. When the other limiting clamping rod 52 enters the clamping groove 71 through the through groove 73, one of the push rods 51 originally clamped in the clamping groove 71 loses the restraining force of the clamping groove 71 and is reset under the elastic action of the reset spring 9, and the adjusting clamping plate 7 is also reset under the action of the reset spring 9, so that the other push rod 51 is clamped in the clamping groove 71.

[0067] When the staff opens any one of the covers 5, the other two covers 5 will be closed, thereby achieving the effect of switching and opening multiple air inlet pipes 4, and finally achieving the effect of switching and spraying the inert atmosphere from the first atmosphere outlet 11, the second atmosphere outlet 12 and the third atmosphere outlet 13, thereby meeting the welding requirements of pipes with different wall thicknesses.

[0068] Furthermore, a sealing ring 31 is fixed inside the sealing insert 3, and the inner wall of the sealing ring 31 is interference fit with the peripheral side of the tungsten electrode, so that the inert atmosphere cannot pass through the sealing insert 3, thereby ensuring its sealing.

[0069] It should be noted that in other embodiments, those skilled in the art can also replace the regulating mechanism with other commonly used mechanisms in the prior art (not shown in the figure), such as a solenoid valve, according to actual use requirements, and connect the solenoid valve to a controller commonly used in the prior art. The controller is a controller commonly used in the prior art and suitable for a TIG welding head for pipe fittings, so that the controller can control the switch of the solenoid valve, thereby controlling the opening and closing of each air inlet pipe 4, and can also open and switch the atmosphere spray range to achieve the purpose of regulating the molten pool position, and can be used in conjunction with automated TIG welding equipment, making automated control more convenient.

[0070] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustment tool for a TIG welding head of a pipe fitting, characterized in that: include: An atmosphere regulating block (1), the atmosphere regulating block (1) being a circular block with a closed upper end, the atmosphere regulating block (1) being provided with a first atmosphere outlet (11), a second atmosphere outlet (12) and a third atmosphere outlet (13) at the lower end, the first atmosphere outlet (11) being provided at the middle of the atmosphere regulating block (1), the second atmosphere outlet (12) being arranged around the first atmosphere outlet (11), and the third atmosphere outlet (13) being arranged around the second atmosphere outlet (12); A sealing insert (3) and an air inlet pipe (4) are fixed to the upper end of the atmosphere adjustment block (1); the sealing insert (3) is used for inserting the tungsten electrode of the welding machine head; the sealing insert (3) is also used for separating the inert atmosphere body so that the inert atmosphere body is located outside the sealing insert (3); a plurality of air inlet pipes (4) are provided and are respectively connected to the upper ends of the first atmosphere outlet (11), the second atmosphere outlet (12) and the third atmosphere outlet (13); A connecting ring (2) is also fixed to the upper end of the atmosphere adjustment block (1), and the connecting ring (2) is fixedly sleeved on the end of the atmosphere output pipe of the welding machine head to form a seal. A cavity for entering the inert atmosphere is formed between the inner side of the connecting ring (2) and the outer side of the sealing insert (3), and the upper ends of the plurality of air inlet pipes (4) are all connected to the cavity; The inert atmosphere ejected from the first atmosphere outlet (11) has the smallest flow range and fits the tip of the tungsten electrode, the inert atmosphere ejected from the second atmosphere outlet (12) has a larger flow range and forms a bottom outward expansion protection area, the inert atmosphere ejected from the third atmosphere outlet (13) has the largest flow range and forms a trumpet-shaped protection area, and the inert atmosphere ejected from the third atmosphere outlet (13) extends to the inside of the weld; The upper end of the atmosphere regulating block (1) is also provided with a regulating mechanism for controlling the opening and closing of a plurality of air inlet pipes (4).

2. The adjusting tool for the welding head of pipe TIG welding according to claim 1 is characterized in that: The cross section of the first atmosphere outlet (11) is a frustum with a larger upper portion and a smaller lower portion, the cross section of the second atmosphere outlet (12) is a slightly expanded shape with the lower end inclined toward the tungsten pole axis, and the cross section of the third atmosphere outlet (13) is a slightly narrowed shape with the lower end inclined away from the tungsten pole axis.

3. The adjusting tool for TIG welding head of pipe fittings according to claim 1 is characterized in that: The regulating mechanism comprises: A sealing cover (5), the sealing cover (5) is arranged on the upper end of the air inlet pipe (4) and closes the upper end opening of the air inlet pipe (4), a push rod (51) is fixed on one side of the sealing cover (5), and an end of the push rod (51) away from the sealing cover (5) slides through the connecting ring (2) and extends to the outside of the connecting ring (2); Wherein, the sealing cover (5) is provided in plurality and corresponds to the plurality of air inlet pipes (4) respectively; A position limiting and resetting component is used to adjust the positions of a plurality of sealing covers (5) so that one of the sealing covers (5) is separated from one of the air inlet pipes (4) and other sealing covers (5) close other air inlet pipes (4).

4. The adjusting tool for the welding head of pipe TIG welding according to claim 3 is characterized in that: The limit and reset assembly comprises: A first fixing plate (6), the first fixing plate (6) being fixed to the top of the atmosphere adjustment block (1), the first fixing plate (6) being located on a side of the cover (5) away from the push rod (51); an adjusting clamping plate (7), the adjusting clamping plate (7) being used for clamping a plurality of push rods (51) and limiting the position of the push rods (51), the adjusting clamping plate (7) only clamping one of the push rods (51) at a time, and when the adjusting clamping plate (7) clamps one of the push rods (51), the sealing cover (5) corresponding to the push rod (51) is separated from the air intake pipe (4); A second fixing plate (8), the lower end of which is fixed to the top of the atmosphere adjustment block (1), and the second fixing plate (8) is located on one side of the adjustment card plate (7); A return spring (9), wherein a plurality of return springs (9) are provided, and the plurality of return springs (9) respectively correspond to a plurality of cover plates (5) and an adjusting card plate (7), and the plurality of cover plates (5) are elastically connected to the first fixing plate (6) via the return spring (9), and the adjusting card plate (7) is also elastically connected to the second fixing plate (8) via the return spring (9).

5. The adjusting tool for the welding head of pipe TIG welding according to claim 4 is characterized in that: A limit clamping rod (52) extending vertically downward is fixed to the lower end of the push rod (51); The adjusting card plate (7) is provided with a card slot (71), a guide opening (72) and a through slot (73); the card slot (71) is connected to the guide opening (72) through the through slot (73); one side of the guide opening (72) forms an inclined side wall; the inclined side wall of the guide opening (72) corresponds to the position of the limit card rod (52); The clamping groove (71) is clamped and adapted with the limiting clamping rod (52), the through groove (73) allows the limiting clamping rod (52) to slide through, and the opening of the guide opening (72) faces one side of the limiting clamping rod (52).

6. The adjusting tool for TIG welding head of pipe fittings according to claim 1 is characterized in that: A sealing ring (31) is fixed inside the sealing insert (3), and the inner wall of the sealing ring (31) is interference-fitted with the peripheral side of the tungsten electrode, so that the inert atmosphere cannot pass through the sealing insert (3).

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