Argon blowing ball head metal seal automatic connection joint structure

Abstract

The utility model relates to an argon blowing ball head metal seal automatic connection joint structure which comprises an argon connection joint, an argon feeding joint and a base, the argon feeding joint is arranged on the base in a sliding mode, an elastic assembly is arranged between the argon feeding joint and the base, a sleeve is arranged in the argon connection joint in a rotating mode, and a driving assembly is arranged between the sleeve and the argon feeding joint. According to the utility model, through the mutual cooperation among the driving assembly, the elastic assembly, the transmission structure and the lock catch assembly, not only can the quick connection between the argon receiving joint and the argon feeding joint be realized, but also the argon receiving joint and the argon feeding joint can be quickly connected after the connection is completed, and the connection is convenient. The argon receiving connector and the argon feeding connector can be locked, the situation that the argon receiving connector and the argon feeding connector completely depend on the gravity of the steel ladle and are insufficient in sealing performance when accidental shaking occurs is avoided, and due to the fact that the argon receiving connector and the argon feeding connector are always kept in the locking state, even if the height or position of the steel ladle needs to be adjusted, the sealing effect cannot be affected.

Description

Technical Field

[0001] This utility model relates to the field of argon blowing technology, specifically to an automatic connection joint structure for an argon blowing ball head metal seal. Background Technology

[0002] The bottom-blowing argon process in steel ladle is a very important part of the steel refining process. It can effectively complete processes such as inclusion flotation, alloy and composition adjustment, wire feeding and stirring, and degassing and desulfurization in the vacuum process, so as to achieve uniform steel temperature and composition, removal of harmful gases and inclusions, and improvement of steel quality.

[0003] The bottom-blowing argon process in steel ladles requires the use of ball-head metal-sealed joints. The function and purpose of the automatic ball-head metal-sealed connection joint for argon blowing are: to reduce labor costs and improve the automation level of equipment, and to modify the connection method of argon blowing in converters and refining steel ladle cars; the argon blowing connection in steel ladle cars eliminates the need for manual quick-change operations, saving manpower and meeting the requirements of reducing personnel and increasing efficiency; it allows personnel to avoid high-altitude and high-temperature working environments and operating positions in molten steel channels, improving the working environment for operators; after the technical upgrade, the time affected by replacing metal hoses is shortened and the number of replacements is reduced, which can effectively reduce maintenance costs.

[0004] The existing automatic connection joint structure for argon blowing ball-head metal seals has the following drawbacks: 1. It relies on the weight of the ladle. The sealing effect of the existing structure depends entirely on the weight of the ladle. When the weight provided by the ladle is insufficient, or when unexpected shaking occurs during use, the compression pressure between the sealing ball head of the argon delivery joint and the copper bushing inside the flared end decreases, easily leading to insufficient sealing. This may cause leakage, affecting the efficiency and quality of the argon blowing process, and may even lead to production accidents. 2. It is difficult to adapt to different working conditions. In some special working conditions, such as when the ladle needs to be moved frequently or in a space-constrained environment, the existing structure may not be able to meet the sealing requirements. In addition, if the height or position of the ladle needs to be adjusted during production, it may also affect the sealing effect. Utility Model Content

[0005] The purpose of this invention is to provide an automatic connection joint structure for argon-blown ball head metal sealing, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An automatic connection joint structure for an argon-blowing ball head metal seal includes an argon receiving joint, an argon delivery joint, and a base. The argon delivery joint is slidably disposed on the base, and an elastic component is disposed between the argon delivery joint and the base. Under the action of the elastic component, the argon delivery joint always has an upward tendency to move.

[0008] The argon inlet connector has a rotatable sleeve inside, and a drive assembly is provided between the sleeve and the argon delivery connector. When the argon delivery connector is inserted into the sleeve, the drive assembly will cause the sleeve to rotate.

[0009] A locking assembly is provided between the argon receiving connector and the argon delivery connector, and the locking assembly is connected to the sleeve through a transmission structure. When the sleeve rotates, the locking assembly will lock the argon receiving connector and the argon delivery connector together under the drive of the transmission structure.

[0010] The argon inlet connector is equipped with a copper bushing, and the argon delivery connector is equipped with a sealing ball head. The copper bushing can cover and seal the sealing ball head.

[0011] As a further embodiment of this utility model:

[0012] The drive assembly includes a plurality of balls that are rolled and fitted into the outer wall of the argon delivery connector, and the plurality of balls are evenly distributed along the circumference.

[0013] The inner wall of the sleeve is provided with an arc-shaped groove, and there are multiple arc-shaped grooves. The multiple arc-shaped grooves are evenly distributed along the circumference, and the multiple balls are respectively rolled and fitted into the multiple arc-shaped grooves.

[0014] Among them, the multiple arc-shaped grooves are configured to expand outwards at one end near the argon delivery connector.

[0015] As a further improvement of this utility model:

[0016] The locking assembly includes a frame and a gear ring coaxially rotatably mounted on the frame, and the frame is mounted on the argon connector via a bracket.

[0017] The frame is provided with a guide groove running radially through it. There are multiple guide grooves, which are evenly distributed around the circumference. The gear ring is provided with multiple arc-shaped through holes running evenly around the circumference.

[0018] As a further improvement of this utility model:

[0019] The outer wall of the argon delivery connector is coaxially provided with a locking ring, and sliding columns are slidably provided in the multiple guide grooves and multiple arc-shaped through holes respectively;

[0020] Each end of the plurality of sliding columns is provided with a limit ring and a stop block. The limit ring is in contact with the toothed ring, and the stop block is in contact with the frame. Each of the plurality of stop blocks is provided with a rubber pad, and the top of each of the plurality of rubber pads abuts against the bottom of the locking ring.

[0021] As a further improvement of this utility model:

[0022] The transmission structure includes a rotating shaft rotatably mounted on the argon connector and a bevel gear ring fixedly sleeved on the outer wall of the sleeve. A first bevel gear and a second bevel gear are coaxially mounted at both ends of the rotating shaft.

[0023] The first bevel gear and the bevel ring mesh with each other. A rotating rod is rotatably provided on the argon connector. The two ends of the rotating rod are respectively coaxially provided with the third bevel gear and the transmission gear. The third bevel gear and the second bevel gear mesh with each other. The transmission gear and the gear ring mesh with each other.

[0024] As a further improvement of this utility model:

[0025] The elastic component includes a protective cover and a spring. The protective cover is fixedly sleeved on the outer wall of the argon delivery connector, and the spring is sleeved on the outside of the argon delivery connector, with both ends of the spring abutting against the protective cover and the base, respectively.

[0026] The inner wall of the base is vertically provided with a limiting groove, and the outer wall of the argon delivery connector is provided with a protruding post along the length direction. The protruding post is located in the limiting groove and slides with each other.

[0027] As a further improvement of this utility model:

[0028] The argon connector has an L-shaped gas groove inside, and the top of the sleeve has a gas hole;

[0029] The air hole is connected to one end of the L-shaped air groove, and the other end of the L-shaped air groove is provided with an air outlet.

[0030] Compared with the prior art, the beneficial effects of this utility model are:

[0031] The argon receiving connector is fixed to the ladle, and the argon delivery connector is mounted on the ladle car via a base. When the ladle moves the argon receiving connector vertically and slowly downward, the top of the argon delivery connector will be inserted into the sleeve. During this process, the drive component will cause the sleeve to rotate, and the copper bushing will contact and seal the sealing ball head. The elastic component will be compressed. During the rotation of the sleeve, the transmission structure will drive the locking component to operate, and the locking component will keep the argon receiving connector and the argon delivery connector locked together.

[0032] This application, through the cooperation of the drive component, elastic component, transmission structure, and locking component, not only enables rapid connection between the argon inlet and argon delivery connectors, reducing labor costs and saving human resources, but also locks the two connectors after connection, avoiding complete reliance on the weight of the ladle and preventing insufficient sealing in case of accidental shaking. Because the argon inlet and argon delivery connectors always remain locked, even if the height or position of the ladle needs to be adjusted under certain special working conditions, the sealing effect will not be affected, thus improving adaptability. Attached Figure Description

[0033] Figure 1 A schematic diagram of the overall structure of an embodiment of an automatic connection joint for an argon-blown ball head metal seal.

[0034] Figure 2 A first-view half-sectional view of one embodiment of the automatic connection joint structure for the metal seal of the argon-blown ball head.

[0035] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0036] Figure 4 for Figure 2 Enlarged view of section B in the middle.

[0037] Figure 5 A schematic diagram showing the argon receiving connector and argon delivery connector in one embodiment of the automatic connection joint structure for the metal seal of the argon blowing ball head.

[0038] Figure 6 A second-view half-sectional view of one embodiment of the automatic connection joint structure for the metal seal of the argon-blown ball head.

[0039] Figure 7 for Figure 6 Enlarged view of point C in the middle.

[0040] Figure 8 A schematic diagram showing the argon delivery connector, protective cover, base, and spring in one embodiment of the automatic connection joint structure for the argon blowing ball head metal seal.

[0041] Figure 9 A schematic diagram showing the disassembly of the argon delivery connector and sleeve in one embodiment of the automatic connection joint structure for the argon blowing ball head metal seal.

[0042] Figure 10 A schematic diagram showing the disassembled locking assembly in one embodiment of the automatic connection joint structure for the metal seal of the argon-blown ball head.

[0043] In the diagram: 1. Argon connector; 101. L-shaped gas groove; 2. Argon delivery connector; 201. Protruding column; 3. Base; 301. Limiting groove; 4. Sleeve; 401. Arc-shaped groove; 402. Gas hole; 5. Copper bushing; 6. Sealing ball head; 7. Ball bearing; 8. Frame; 801. Guide groove; 9. Gear ring; 901. Arc-shaped through hole; 10. Bracket; 11. Sliding column; 12. Limiting ring; 13. Stop block; 14. Rubber pad; 15. Locking ring; 16. Rotating shaft; 17. Bevel gear ring; 18. Bevel gear No. 1; 19. Bevel gear No. 2; 20. Rotating rod; 21. Bevel gear No. 3; 22. Transmission gear; 23. Protective cover; 24. Spring. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] Furthermore, the elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0046] Please see Figures 1-10 In this embodiment of the utility model, an automatic connection joint structure for an argon-blowing ball head metal seal includes an argon receiving joint 1, an argon delivery joint 2, and a base 3. The argon delivery joint 2 is slidably disposed on the base 3. An elastic component is disposed between the argon delivery joint 2 and the base 3. Under the action of the elastic component, the argon delivery joint 2 always has an upward tendency.

[0047] The argon inlet connector 1 is rotatably provided with a sleeve 4, and a drive assembly is provided between the sleeve 4 and the argon delivery connector 2. When the argon delivery connector 2 is inserted into the sleeve 4, the drive assembly will cause the sleeve 4 to rotate.

[0048] A locking assembly is provided between the argon receiving connector 1 and the argon delivery connector 2, and the locking assembly is connected to the sleeve 4 through a transmission structure. When the sleeve 4 rotates, the locking assembly will lock the argon receiving connector 1 and the argon delivery connector 2 together under the drive of the transmission structure.

[0049] The argon inlet connector 1 is provided with a copper bushing 5 inside, and the argon delivery connector 2 is provided with a sealing ball head 6. The copper bushing 5 can cover and seal the sealing ball head 6.

[0050] In this scheme, the argon receiving connector 1 is fixed on the ladle, and the argon delivery connector 2 is set on the ladle car through the base 3. When the ladle drives the argon receiving connector 1 to move vertically and slowly downward, the top of the argon delivery connector 2 will be inserted into the sleeve 4. During this process, the drive component will cause the sleeve 4 to rotate, the copper bushing 5 will contact and cover the sealing ball head 6 to seal, and the elastic component will be compressed. During the rotation of the sleeve 4, the locking component will be driven to run through the transmission structure. The locking component will keep the argon receiving connector 1 and the argon delivery connector 2 in a mutually locked state.

[0051] As a further embodiment of the present invention, the driving component includes a ball bearing 7 that is rolled and fitted into the outer wall of the argon delivery connector 2. The ball bearing 7 is provided in a plurality of manners, and the plurality of ball bearing 7 are evenly distributed along the circumference.

[0052] The inner sidewall of the sleeve 4 is provided with an arc-shaped groove 401. There are multiple arc-shaped grooves 401, and the multiple arc-shaped grooves 401 are evenly distributed along the circumference. The multiple balls 7 are also respectively rolled and embedded in the multiple arc-shaped grooves 401.

[0053] Among them, the multiple arc-shaped grooves 401 are configured to expand outward at one end near the argon delivery connector 2.

[0054] In this embodiment, since the multiple balls 7 that are rolled and fitted on the outer wall of the argon delivery connector 2 are also rolled and fitted in the multiple arc-shaped grooves 401, and the sleeve 4 is rotatably set inside the argon delivery connector 1, when the argon delivery connector 2 moves vertically and cannot rotate, the balls 7 will cooperate with the arc-shaped grooves 401, causing the sleeve 4 to rotate. The end of the arc-shaped groove 401 near the argon delivery connector 2 is set to be outwardly flared so that the balls 7 can smoothly slide into the arc-shaped groove 401 during the connection process.

[0055] As a further embodiment of this utility model, the locking assembly includes a frame 8 and a gear ring 9 coaxially rotatably disposed on the frame 8, wherein the frame 8 is disposed on the argon connector 1 via a bracket 10.

[0056] The bracket 8 is provided with a radially penetrating guide groove 801. Multiple guide grooves 801 are provided and are evenly distributed along the circumference. Multiple arc-shaped through holes 901 are evenly penetrating along the circumference of the gear ring 9.

[0057] The outer wall of the argon delivery connector 2 is coaxially provided with a locking ring 15, and sliding columns 11 are slidably provided in the multiple guide grooves 801 and the multiple arc-shaped through holes 901 respectively.

[0058] Each end of the plurality of sliding columns 11 is provided with a limiting ring 12 and a stop block 13. The limiting ring 12 is in contact with the toothed ring 9, and the stop block 13 is in contact with the frame 8. Each of the plurality of stop blocks 13 is provided with a rubber pad 14, and the top of the plurality of rubber pads 14 abuts against the bottom of the locking ring 15.

[0059] In this embodiment, since multiple guide grooves 801 are radially through the frame 8, and multiple arc-shaped through holes 901 are uniformly through the circumference of the gear ring 9, and sliding columns 11 are slidably disposed in the multiple guide grooves 801 and the multiple arc-shaped through holes 901, when the frame 8 is fixed and the gear ring 9 is rotated, the multiple sliding columns 11 will slide synchronously in the multiple guide grooves 801, either converging or dispersing outwards.

[0060] The argon delivery connector 2 is configured such that when it is inserted into the sleeve 4, the sleeve 4 will drive the gear ring 9 to rotate through the transmission structure. At this time, the rotation of the gear ring 9 can cause multiple sliding columns 11 to converge. Conversely, when the argon delivery connector 2 is removed from the sleeve 4, the multiple sliding columns 11 will disperse outward.

[0061] Since the sliding column 11 is provided with a limit ring 12 and a stop block 13 at both ends, the limit ring 12 fits with the toothed ring 9, the stop block 13 fits with the bracket 8, and a rubber pad 14 is provided on the stop block 13, and a locking ring 15 is coaxially provided on the outer wall of the argon delivery connector 2, when the argon delivery connector 2 is inserted into the sleeve 4, the locking ring 15 will move upward with the argon delivery connector 2. At the same time, the sliding column 11 will drive the stop block 13 and the rubber pad 14 to move closer together. When the argon delivery connector 2 is connected to the sleeve 4, the top of the rubber pad 14 abuts against the bottom of the locking ring 15.

[0062] As a further embodiment of this utility model, the transmission structure includes a rotating shaft 16 rotatably mounted on the argon connector 1 and a bevel gear ring 17 fixedly sleeved on the outer wall of the sleeve 4. The two ends of the rotating shaft 16 are respectively coaxially provided with a first bevel gear 18 and a second bevel gear 19.

[0063] The first bevel gear 18 and the bevel ring 17 mesh with each other. A rotating rod 20 is rotatably provided on the argon connector 1. The two ends of the rotating rod 20 are respectively coaxially provided with a third bevel gear 21 and a transmission gear 22. The third bevel gear 21 and the second bevel gear 19 mesh with each other, and the transmission gear 22 and the gear ring 9 mesh with each other.

[0064] In this embodiment, since the first bevel gear 18 fixed on the rotating shaft 16 and the bevel ring 17 fixed on the outer wall of the sleeve 4 mesh with each other, the rotating shaft 16 will rotate when the sleeve 4 rotates.

[0065] Furthermore, since the No. 3 bevel gear 21 fixed on the rotating rod 20 and the No. 2 bevel gear 19 fixed on the rotating shaft 16 mesh with each other, the rotating rod 20 will rotate along with the rotating shaft 16 when the rotating shaft 16 rotates.

[0066] Since the transmission gear 22 and the gear ring 9 fixed on the rotating rod 20 mesh with each other, the gear ring 9 will rotate along with the rotating rod 20 when it rotates.

[0067] As a further embodiment of this utility model, the elastic component includes a protective cover 23 and a spring 24. The protective cover 23 is fixedly sleeved on the outer wall of the argon delivery connector 2, and the spring 24 is sleeved on the outside of the argon delivery connector 2, with both ends of the spring 24 abutting against the protective cover 23 and the base 3 respectively.

[0068] The inner wall of the base 3 is vertically provided with a limiting groove 301, and the outer wall of the argon delivery connector 2 is provided with a protruding post 201 along the length direction. The protruding post 201 is located in the limiting groove 301 and slides with each other.

[0069] In this embodiment, since the two ends of the spring 24 abut against the cover 23 and the base 3 respectively, the cover 23 is fixedly sleeved on the outer wall of the argon delivery connector 2, and the argon delivery connector 2 is slidably mounted on the base 3, when the sealing ball head 6 on the argon delivery connector 2 is subjected to the downward pressure of the copper bushing 5, the cover 23 and the base 3 will compress the spring 24. Under the action of the spring 24, the sealing ball head 6 and the copper bushing 5 will always maintain a sealed state.

[0070] Furthermore, because the protrusion 201 fixed along the length of the outer wall of the argon delivery connector 2 is located in the vertically opened limiting groove 301 on the inner wall of the base 3 and they slide and cooperate with each other, the argon delivery connector 2 can only slide vertically on the base 3 and cannot rotate.

[0071] As a further embodiment of this utility model, the interior of the argon connector 1 is provided with an L-shaped gas groove 101, and the top of the sleeve 4 is provided with a gas hole 402.

[0072] The air hole 402 is connected to one end of the L-shaped air groove 101, and the other end of the L-shaped air groove 101 is provided with an air outlet.

[0073] In this embodiment, since the air hole 402 at the top of the sleeve 4 is connected to one end of the L-shaped air groove 101, and the other end of the L-shaped air groove 101 is provided with an air outlet, the gas will enter the sleeve 4 through the air passage inside the argon delivery connector 2, then enter the L-shaped air groove 101 through the air hole 402, and finally be discharged from the air outlet at the other end of the L-shaped air groove 101.

[0074] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0075] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A structure of automatic connection joint of blow argon ball head metal seal, comprising argon connection joint (1), argon sending joint (2) and base (3), characterized in that, The argon delivery connector (2) is slidably disposed on the base (3), and an elastic component is provided between the argon delivery connector (2) and the base (3). Under the action of the elastic component, the argon delivery connector (2) always has an upward tendency. The argon inlet connector (1) is provided with a sleeve (4) for rotation. A drive assembly is provided between the sleeve (4) and the argon delivery connector (2). When the argon delivery connector (2) is inserted into the sleeve (4), the drive assembly will cause the sleeve (4) to rotate. A locking assembly is provided between the argon receiving connector (1) and the argon delivery connector (2), and the locking assembly is connected to the sleeve (4) through a transmission structure. When the sleeve (4) rotates, the locking assembly will lock the argon receiving connector (1) and the argon delivery connector (2) together under the drive of the transmission structure. The argon inlet connector (1) is provided with a copper bushing (5), and the argon delivery connector (2) is provided with a sealing ball head (6). The copper bushing (5) can cover and seal the sealing ball head (6).

2. The automatic blow-to-ball metal seal connector structure of claim 1, wherein The drive assembly includes a ball (7) that is rolled and fitted into the outer wall of the argon delivery connector (2). The ball (7) is provided in multiple quantities and the multiple balls (7) are evenly distributed along the circumference. The inner wall of the sleeve (4) is provided with an arc groove (401). There are multiple arc grooves (401), and the multiple arc grooves (401) are evenly distributed along the circumference. The multiple balls (7) are also respectively rolled and fitted into the multiple arc grooves (401). Among them, the multiple arc-shaped grooves (401) are arranged in an outward-expanding shape at one end near the argon delivery connector (2).

3. The automatic connection joint structure for an argon-blown ball head metal seal according to claim 1, characterized in that, The locking assembly includes a frame (8) and a gear ring (9) coaxially rotatably mounted on the frame (8). The frame (8) is mounted on the argon connector (1) via a bracket (10). The bracket (8) has a guide groove (801) that runs through it radially. There are multiple guide grooves (801) that run evenly around the circumference. The gear ring (9) has multiple arc-shaped through holes (901) that run evenly around the circumference.

4. The blow argon ball head metal seal automatic connection joint structure according to claim 3, characterized in that, The outer wall of the argon delivery connector (2) is coaxially provided with a locking ring (15), and a sliding column (11) is slidably provided in the multiple guide grooves (801) and the multiple arc-shaped through holes (901). Each of the multiple sliding columns (11) is provided with a limit ring (12) and a stop block (13) at both ends. The limit ring (12) is in contact with the toothed ring (9), and the stop block (13) is in contact with the frame (8). Each of the multiple stop blocks (13) is provided with a rubber pad (14), and the top of each of the multiple rubber pads (14) abuts against the bottom of the locking ring (15).

5. The structure of the automatic connection joint of the ball head metal seal by argon blowing according to claim 3, characterized in that, The transmission structure includes a rotating shaft (16) rotatably mounted on the argon connector (1) and a bevel gear ring (17) fixedly mounted on the outer wall of the sleeve (4). The two ends of the rotating shaft (16) are respectively coaxially mounted with a first bevel gear (18) and a second bevel gear (19). The first bevel gear (18) and the bevel ring (17) mesh with each other. A rotating rod (20) is rotatably provided on the argon connector (1). The two ends of the rotating rod (20) are respectively coaxially provided with a third bevel gear (21) and a transmission gear (22). The third bevel gear (21) and the second bevel gear (19) mesh with each other. The transmission gear (22) and the gear ring (9) mesh with each other.

6. The structure of the automatic connection joint of the ball head metal seal by argon blowing according to claim 1, characterized in that, The elastic component includes a protective cover (23) and a spring (24). The protective cover (23) is fixedly sleeved on the outer wall of the argon delivery connector (2), and the spring (24) is sleeved on the outside of the argon delivery connector (2). The two ends of the spring (24) abut against the protective cover (23) and the base (3) respectively. The inner wall of the base (3) has a vertically opening limiting groove (301), and the outer wall of the argon delivery connector (2) is provided with a protruding post (201) along the length direction. The protruding post (201) is located in the limiting groove (301) and slides with each other.

7. The structure of the automatic connection joint of the ball head metal seal by argon blowing according to claim 1, characterized in that, The argon connector (1) has an L-shaped gas groove (101) inside, and the top of the sleeve (4) has a gas hole (402). The air hole (402) is connected to one end of the L-shaped air groove (101), and the other end of the L-shaped air groove (101) is provided with an air outlet.

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