An argon protection system for die casting

Abstract

The utility model provides a kind of argon protection system for die casting pouring, including protective cover body, sealing curtain and first air inlet pipe, protective cover body is sleeved in the outer periphery of lower water gap, and sealing element is equipped between lower water gap;Protective cover body is equipped with annular air chamber inside;Sealing curtain is surrounded in the outer periphery of protective cover body, with the extension part of laying on the upper end surface of middle injection pipe;First air inlet pipe is connected on protective cover body and is communicated with annular air chamber.The protective cover body and sealing curtain are enclosed to form sealed pouring cavity, and multiple air injection holes are provided on the cavity wall of annular air chamber;First air inlet pipe is used to pass through annular air chamber and air injection hole and pass into argon into sealed pouring cavity.The utility model provides a kind of argon protection system for die casting pouring, which can form a sealed pouring cavity with good sealing between the lower water gap and the middle injection pipe, and form an effective argon protection barrier in the sealed pouring cavity, effectively preventing the intrusion of external air, reducing the risk of secondary oxidation of steel liquid, and improving the quality of steel ingot.

Description

Technical Field

[0001] This utility model belongs to the field of ingot casting steelmaking technology, specifically relating to an argon gas protection system for ingot casting. Background Technology

[0002] In steelmaking technology, ingot casting is an important steelmaking and forming process. It involves pouring molten steel into a mold, where it solidifies over a period of time to form a steel ingot. During ingot casting, argon gas is typically introduced between the ladle nozzle and the pouring pipe to create an inert atmosphere barrier in the pouring channel. This effectively isolates the ingot from atmospheric gases such as oxygen and nitrogen, reducing secondary oxidation and gas absorption in the molten steel, and improving the quality of the steel ingot.

[0003] In existing technology, a protective cover is fitted around the ladle nozzle and the pouring pipe, and argon gas is introduced into the cover to reduce oxidation during the molten steel pouring process. However, the existing protective cover has insufficient sealing and cannot effectively form a protective atmosphere inside. As a result, the protected area is susceptible to atmospheric intrusion during the pouring process, and the gas composition is unstable. The molten steel inevitably comes into contact with the atmosphere, causing secondary oxidation and affecting the internal quality of the steel ingot. Utility Model Content

[0004] This utility model provides an argon gas protection system for die casting, which aims to solve the technical problem in the prior art where the protective cover has insufficient sealing performance, the protected area is easily affected by atmospheric intrusion, and secondary oxidation of molten steel is caused.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an argon gas protection system for ingot casting, comprising:

[0006] A protective cover is fitted around the outer periphery of the drain outlet and a sealing element is provided between the cover and the drain outlet; the protective cover has an annular air cavity located on the radial periphery of the drain outlet.

[0007] A sealing curtain is installed around the outer perimeter of the protective cover, and its lower part has an extension laid on the upper end face of the injection pipe; and

[0008] The first air intake pipe is connected to the protective cover and communicates with the annular air cavity;

[0009] The protective cover and the sealing curtain together form a sealed casting cavity, which is located between the drain outlet and the middle injection pipe. The annular gas cavity has multiple air jet holes that communicate with the sealed casting cavity on its cavity wall. The first air inlet pipe is used to introduce argon gas into the sealed casting cavity through the annular gas cavity and the air jet holes.

[0010] In one possible implementation, the plurality of jet holes are divided into:

[0011] A plurality of first air holes are spaced apart on the inner peripheral wall of the annular air cavity, the main axis of the first air holes extending horizontally; and

[0012] Several second air holes are spaced apart on the bottom wall of the annular air cavity, and the main axis of the second air holes extends in the vertical direction.

[0013] In one possible implementation, the protective cover has an upwardly extending connecting sleeve fitted around the outer periphery of the drain outlet, an annular support plate connected to the inner peripheral wall of the connecting sleeve, and a sealing element disposed between the connecting sleeve and the drain outlet and above the annular support plate.

[0014] In some embodiments, the seal includes:

[0015] A first sealing ring is disposed on the inner circumferential wall of the connecting sleeve, and is used to fit onto the outer circumferential wall of the drain outlet; and

[0016] The second sealing ring is connected to the bottom of the first sealing ring and is located above the annular support plate. The inner peripheral wall of the second sealing ring is used to abut against the outer peripheral wall of the drain outlet.

[0017] In some embodiments, the peripheral wall of the connecting sleeve is provided with a plurality of slots, the slots being disposed through the top surface of the connecting sleeve and extending along the circumference of the connecting sleeve; the plurality of slots are used to engage with a plurality of protrusions on the drain outlet one by one.

[0018] In one possible implementation, the argon gas protection system for ingot casting further includes a fastening assembly, the fastening assembly comprising:

[0019] An elastic collar, fitted around the outer periphery of the sealing fabric curtain, has two parallel mounting portions; and

[0020] Fasteners, provided through both mounting portions, are used to tighten the two mounting portions so that the sealing curtain is tightly fitted onto the outer periphery of the protective cover via the elastic collar.

[0021] In one possible implementation, the argon gas protection system for ingot casting further includes two semi-pressure rings, which are symmetrically located on the radial periphery of the sealing curtain and are used to press the extension above the central injection tube.

[0022] In one possible implementation, the argon protection system for mold casting further includes a mold argon filling assembly for introducing argon gas into the cavities of multiple molds.

[0023] In some embodiments, the mold argon filling assembly includes:

[0024] An annular sleeve is fitted around the periphery of the central injection tube;

[0025] Multiple branch pipes are respectively connected to the annular sleeve, and are configured to correspond one-to-one with the multiple molds; and

[0026] The second air intake pipe is connected to the annular sleeve.

[0027] In some embodiments, the outlet end of the branch pipe is connected to a bent pipe for extending into the inner cavity of the mold, and a cap is fitted around the outer periphery of the bent pipe for covering the upper opening of the mold.

[0028] The beneficial effects of the argon gas protection system for ingot casting provided by this utility model are as follows: By setting a seal between the protective cover and the outlet, setting a sealing curtain around the outer perimeter of the protective cover, and setting a horizontal extension at the lower part of the sealing curtain so that the extension is laid flat on the upper end face of the middle injection pipe, a well-sealed casting cavity is formed between the outlet and the middle injection pipe, effectively preventing the intrusion of outside air; at the same time, argon gas enters the annular gas cavity through the first gas inlet pipe, and then diffuses evenly into the sealed casting cavity through multiple jet holes. During the process of molten steel flowing from the outlet to the middle injection pipe, it is surrounded by an inert argon gas environment, which greatly reduces the chance of molten steel contacting the atmosphere and effectively reduces the risk of secondary oxidation of molten steel.

[0029] Compared with the prior art, the argon gas protection system for ingot casting of this utility model can form a well-sealed casting cavity between the sprue and the middle injection pipe, and can form an effective argon gas protection barrier in the sealed casting cavity, effectively preventing the intrusion of external air, significantly reducing the risk of secondary oxidation of molten steel, and improving the internal quality of steel ingots. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram of the installation state of an argon gas protection system for die casting provided by an embodiment of this utility model;

[0032] Figure 2 This is an embodiment of the present utility model. Figure 1 Schematic diagram of the cross-sectional structure along line AA;

[0033] Figure 3 A schematic diagram of the connection structure between the protective cover and the drain outlet provided in this embodiment of the utility model;

[0034] Figure 4 A schematic diagram of the mold argon filling assembly in use according to an embodiment of this utility model;

[0035] Figure 5 This is an embodiment of the present utility model. Figure 4 A top-view structural diagram.

[0036] The following are the labeling elements in the figure:

[0037] 1. Protective cover; 11. Annular air chamber; 12. Sealed casting chamber; 13. Air vent; 131. First air hole; 132. Second air hole; 14. Connecting sleeve; 141. Annular support plate; 142. Slot; 2. Sealing element; 21. First sealing ring; 22. Second sealing ring; 3. Sealing curtain; 31. Extension; 4. First air inlet pipe; 5. Fastening assembly; 51. Elastic collar; 511. Mounting part; 52. Fastener; 6. Semi-pressure ring; 7. Mold argon filling assembly; 71. Annular sleeve; 72. Branch pipe; 721. Bend; 73. Second air inlet pipe; 74. Cover; 10. Drain outlet; 101. Boss; 20. Central injection pipe; 201. Pulley brick; 30. Mold. Detailed Implementation

[0038] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0039] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0040] Please refer to the following: Figures 1 to 5 The present invention provides an argon gas protection system for mold casting. The argon gas protection system for mold casting includes a protective cover 1, a sealing curtain 3, and a first air inlet pipe 4. The protective cover 1 is fitted around the outer periphery of the drain outlet 10, and a sealing element 2 is provided between the protective cover 1 and the drain outlet 10. An annular gas cavity 11 is provided inside the protective cover 1, located radially around the drain outlet 10. The sealing curtain 3 surrounds the outer periphery of the protective cover 1, and its lower part has an extension 31 laid on the upper end face of the injection pipe 20. The first air inlet pipe 4 is connected to the protective cover 1 and communicates with the annular gas cavity 11.

[0041] The protective cover 1 and the sealing curtain 3 enclose a sealed casting cavity 12, which is located between the drain outlet 10 and the middle injection pipe 20. The annular gas cavity 11 has multiple air jet holes 13 that communicate with the sealed casting cavity 12 on its cavity wall. The first air inlet pipe 4 is used to introduce argon gas into the sealed casting cavity 12 through the annular gas cavity 11 and the air jet holes 13.

[0042] This embodiment provides an argon gas protection system for ingot casting. By setting a seal 2 between the protective cover 1 and the outlet 10, and setting a sealing curtain 3 around the outer perimeter of the protective cover 1, and setting a horizontal extension 31 at the lower part of the sealing curtain 3, the extension 31 is laid flat on the upper end surface of the middle injection pipe 20, thereby forming a well-sealed casting cavity 12 between the outlet 10 and the middle injection pipe 20, effectively preventing the intrusion of outside air. At the same time, argon gas enters the annular gas cavity 11 through the first air inlet pipe 4, and then diffuses evenly into the sealed casting cavity 12 through multiple air jet holes 13. During the process of molten steel flowing from the outlet 10 to the middle injection pipe 20, it is surrounded by an inert argon gas environment, which greatly reduces the chance of molten steel contacting the atmosphere and effectively reduces the risk of secondary oxidation of molten steel.

[0043] Compared with the prior art, the argon gas protection system for ingot casting of this utility model can form a well-sealed casting cavity 12 between the outlet 10 and the middle injection pipe 20, and can form an effective argon gas protection barrier in the sealed casting cavity 12, effectively preventing the intrusion of external air, significantly reducing the risk of secondary oxidation of molten steel, and improving the internal quality of steel ingots.

[0044] Specifically, both the sealing curtain 3 and the sealing element 2 are made of ceramic fiber felt. Ceramic fiber felt possesses excellent high-temperature resistance, capable of withstanding the radiant heat of molten steel and the high-temperature impact of splashing steel during the casting process, ensuring the stability of the sealing structure throughout the entire casting cycle. Furthermore, the ceramic fiber felt is soft and elastic, allowing it to better conform to irregular sealing surfaces (such as the small protrusions on the outer wall of the drain outlet 10 and the minor unevenness on the upper surface of the injection pipe 20). By filling the sealing gaps through its own deformation, it enhances the sealing performance between the protective cover 1 and the drain outlet 10, as well as between the sealing curtain 3 and the injection pipe 20. Simultaneously, the good flexibility of the ceramic fiber felt makes it easy to cut and process into shapes suitable for the sealing element 2 and the sealing curtain 3, resulting in a high degree of fit during installation and facilitating the installation of the extension 31 of the sealing curtain 3, thus balancing sealing performance with ease of use.

[0045] It should be noted that the sealing performance of the sealed casting cavity 12 is enhanced by the extension 31 on the sealing element 2 and the sealing curtain 3. Simultaneously, the continuous supply of argon gas into the sealed casting cavity 12 by the first air inlet pipe 4 causes the gas pressure inside the sealed casting cavity 12 to continuously increase. To prevent excessive argon gas from being drawn into the casting system with the molten steel, which could lead to subcutaneous bubbles, pinholes, or slag inclusions during ingot solidification, a pressure relief valve (not shown in the figure) needs to be installed on the protective cover 1. When the pressure inside the sealed casting cavity 12 exceeds a set value, the pressure relief valve automatically opens to release pressure, ensuring the stability of the sealed casting cavity 12.

[0046] In existing in-situ casting systems, the sprue 10 is located at the bottom of the ladle to guide the molten steel in the ladle downwards into the inlet pipe 20. The orifice size, structural design, and opening / closing mechanism (such as a sliding gate or stopper rod) of the sprue 10 can be coordinated to precisely adjust the flow rate and velocity of the molten steel to meet the flow requirements of different casting processes.

[0047] The middle injection pipe 20 is equipped with a hopper brick 201, which is a funnel-shaped structure that is wider at the top and narrower at the bottom. It is used to receive the molten steel flowing out from the ladle outlet 10. The molten steel is guided to flow smoothly into the middle injection pipe 20 through the inclined inner wall, so as to avoid the molten steel directly impacting the inner wall of the middle injection pipe 20 and causing splashing or turbulence, thus reducing the risk of molten steel overflow.

[0048] In this embodiment, after the ladle containing molten steel is placed on the casting vehicle, the protective cover 1 is fitted around the outer periphery of the drain outlet 10, so that the sealing element 2 is tightly attached to the outer peripheral wall of the drain outlet 10 to seal the outer periphery of the drain outlet 10. The first air inlet pipe 4 is connected to the argon gas pipeline, and the argon gas pressure is set to 0.1 MPa. Then, the ladle is moved so that the drain outlet 10 is vertically aligned with the middle injection pipe 20, and the ladle is lowered so that the sealing curtain 3 is fitted around the outer periphery of the hopper brick 201 of the middle injection pipe 20, and the extension 31 is laid flat on the upper end face of the middle injection pipe 20 to seal the upper edge of the middle injection pipe 20. Thus, a well-sealed casting cavity 12 is formed, and a stable protective barrier is constructed by the introduction of argon gas, providing a guarantee for subsequent casting processes.

[0049] In some embodiments, the jet hole 13 may be as follows: Figure 1 and Figure 2 The structure shown. See also Figure 1 and Figure 2 The multiple jet holes 13 are divided into several first air holes 131 and several second air holes 132. The several first air holes 131 are spaced apart on the inner peripheral wall of the annular air cavity 11, and the main axis of the first air holes 131 extends in the horizontal direction; the several second air holes 132 are spaced apart on the bottom wall of the annular air cavity 11, and the main axis of the second air holes 132 extends in the vertical direction.

[0050] In this embodiment, the longitudinal section of the annular gas cavity 11 is rectangular. The rectangular cross-section of the annular gas cavity 11 is easier to process and can increase the argon gas capacity, ensuring a continuous supply of argon gas.

[0051] Multiple first vents 131 are evenly distributed on the inner peripheral wall of the annular gas cavity 11, so that some of the argon gas in the annular gas cavity 11 is evenly sprayed out in the horizontal direction, which facilitates the discharge of the original air in the sealed casting cavity 12 located outside the water outlet 10, ensuring that the argon gas can quickly fill the sealed casting cavity 12, avoiding dead corners of residual air, and creating a purer casting environment for the molten steel.

[0052] Multiple second air holes 132 are evenly distributed on the bottom wall of the annular air cavity 11, so that some of the argon gas in the annular air cavity 11 is evenly sprayed downwards, which can form a columnar air curtain around the water outlet 10 and the hopper brick 201, effectively blocking the intrusion of external air into the flow channel of molten steel.

[0053] In some embodiments, the protective cover 1 may be adopted as follows: Figure 1 and Figure 3 The structure shown. See also Figure 1 and Figure 3The protective cover 1 has an upwardly extending connecting sleeve 14, which is sleeved on the outer periphery of the drain outlet 10. An annular support plate 141 is connected to the inner peripheral wall of the connecting sleeve 14. The sealing element 2 is located between the connecting sleeve 14 and the drain outlet 10 and above the annular support plate 141.

[0054] The protective cover 1 is fitted around the drain outlet 10 via the connecting sleeve 14. The annular support plate 141 provides a flat support surface for the seal 2, enabling the seal 2 to better fill the gap between the connecting sleeve 14 and the drain outlet 10, effectively preventing air intrusion and improving the sealing and stability of the connection between the protective cover 1 and the drain outlet 10.

[0055] In some embodiments, the seal 2 described above may be as follows: Figure 1 The structure shown. See also Figure 1 The sealing element 2 includes a first sealing ring 21 and a second sealing ring 22. The first sealing ring 21 is disposed around the inner peripheral wall of the connecting sleeve 14 and is used to fit onto the outer peripheral wall of the drain outlet 10. The second sealing ring 22 is connected to the bottom of the first sealing ring 21 and is located above the annular support plate 141. The inner peripheral wall of the second sealing ring 22 is used to abut against the outer peripheral wall of the drain outlet 10.

[0056] The first sealing ring 21 adopts a ring design and extends along the axial direction of the drain outlet 10, which can fully wrap the outer peripheral wall of the drain outlet 10 and provide a preliminary sealing effect. The second sealing ring 22 is placed at the bottom of the first sealing ring 21, and its inner peripheral wall extends horizontally in the axial direction until it tightly abuts against the outer peripheral wall of the drain outlet 10. The setting of the second sealing ring 22 can adapt to the shoulder structure on the outer peripheral wall of the drain outlet 10, ensuring the fit between the sealing element 2 and the drain outlet 10. Together with the first sealing ring 21, it forms a double sealing guarantee to ensure the stability of the argon environment in the sealed casting cavity 12.

[0057] In some embodiments, the connecting sleeve 14 and the drain outlet 10 are connected by a method such as Figure 1 and Figure 3 The structure shown. See also Figure 1 and Figure 3 The connecting sleeve 14 has multiple slots 142 on its peripheral wall. The slots 142 penetrate the top surface of the connecting sleeve 14 and extend along the circumference of the connecting sleeve 14. The multiple slots 142 are used to engage with the multiple protrusions 101 on the drain outlet 10 one by one.

[0058] The existing drain outlet 10 has four protrusions 101 spaced circumferentially on its outer peripheral wall. In order to facilitate the quick connection between the connecting sleeve 14 and the drain outlet 10, in this embodiment, four slots 142 are provided on the connecting sleeve 14 for corresponding engagement with the four protrusions 101.

[0059] Specifically, the slot 142 extends downward from the top surface of the connecting sleeve 14, and then extends circumferentially along the connecting sleeve 14 to form an inverted "L"-shaped slot 142. During installation, the connecting sleeve 14 is rotated from bottom to top, so that the protrusions 101 are inserted one by one into the vertically extending part of the slot 142. Then, the connecting sleeve 14 is rotated horizontally so that the protrusions 101 are engaged in the circumferentially extending part of the slot 142, completing the quick connection between the protective cover 1 and the drain outlet 10. At the same time, the sealing element 2 is used to achieve a sealed connection between the two.

[0060] like Figure 1 and Figure 2 As shown, the above-mentioned argon gas protection system for mold casting may also include a fastening component 5. The fastening component 5 includes an elastic collar 51 and a fastener 52. The elastic collar 51 is sleeved on the outer periphery of the sealing curtain 3 and has two parallel mounting parts 511. The fastener 52 is provided through the two mounting parts 511 and is used to tighten the two mounting parts 511 so that the sealing curtain 3 is tightly sleeved on the outer periphery of the protective cover 1 through the elastic collar 51.

[0061] The elastic collar 51 is made of thin steel plate and has good strength and flexibility. After the sealing curtain 3 is placed around the outer peripheral wall of the protective cover 1, the two mounting parts 511 are pulled in the opposite direction to open the elastic collar 51 and put it around the outer periphery of the sealing curtain 3. Then, the fastener 52 is inserted through the two mounting parts 511. By adjusting the tightness of the fastener 52, the two mounting parts 511 are gradually brought closer together, so that the elastic collar 51 can tighten the sealing curtain 3 appropriately to ensure a good sealing effect between the sealing curtain 3 and the protective cover 1.

[0062] Fastener 52 can be a combination of bolts and nuts, which, together with elastic collar 51, enables quick installation of the sealing curtain 3 and the protective cover 1, ensuring the stability of the connection.

[0063] Preferably, the above-mentioned argon gas protection system for ingot casting further includes two semi-pressure rings 6, which are symmetrically located on the radial periphery of the sealing curtain 3, for pressing the extension 31 above the central injection pipe 20.

[0064] The two semi-pressure rings 6 are symmetrically arranged and each has a certain weight, which can evenly press the extension 31 of the sealing curtain 3 onto the upper end surface of the injection pipe 20 to form a flat and tight sealing surface, effectively preventing outside air from entering from the connection between the sealing curtain 3 and the injection pipe 20.

[0065] In use, there is no need to install or connect the half-pressure rings 6. After laying the extension 31 flat on the upper end face of the middle injection tube 20, simply place the two half-pressure rings 6 symmetrically on the extension 31. The sealing effect between the extension 31 and the upper end face of the middle injection tube 20 can be achieved by the weight of the half-pressure rings 6. The operation is simple and convenient.

[0066] The two semi-pressure rings 6 are joined together as much as possible to form a complete circle, which is then fitted around the sealing curtain 3 to ensure a full-range seal on the contact surface between the sealing curtain 3 and the central injection pipe 20, reducing the possibility of external air intrusion.

[0067] In some embodiments, see Figure 4 and Figure 5 The aforementioned argon gas protection system for die casting also includes a die argon filling component 7, which is used to introduce argon gas into the inner cavities of multiple dies 30.

[0068] This embodiment refers to a bottom-pouring system, which can simultaneously pour water into multiple molds 30 through the central pouring pipe 20 and the pouring channel located at the bottom of the mold 30.

[0069] After the molds 30 of the pouring system are installed, argon gas is introduced into the inner cavity of each mold 30 20 minutes before pouring using the mold argon filling component 7. This replaces the air in each mold 30 in advance, so that the oxygen content in the mold 30 is less than 5%. This creates a low-oxygen environment for the injection of molten steel, reduces the oxidation of molten steel in the mold 30, and further ensures the quality of the steel ingot.

[0070] For example, the mold filling assembly 7 consists of multiple argon blowing tubes, which can sequentially supply argon gas into the inner cavity of each mold 30, or simultaneously supply argon gas into multiple molds 30.

[0071] For example, the mold argon filling assembly 7 includes an annular sleeve 71, multiple branch pipes 72, and a second air inlet pipe 73. The annular sleeve 71 is sleeved around the central injection pipe 20; the multiple branch pipes 72 are respectively connected to the annular sleeve 71 and are respectively set to correspond to multiple molds 30; the second air inlet pipe 73 is connected to the annular sleeve 71.

[0072] In this embodiment, multiple molds 30 are arranged at intervals around the central injection pipe 20 along its circumference. An annular sleeve 71 is fitted around the central injection pipe 20, which can evenly distribute the argon gas supplied by the second air inlet pipe 73 into each branch pipe 72. Each branch pipe 72 then introduces the argon gas into the corresponding mold 30 cavity, realizing simultaneous argon filling of multiple molds 30 and improving the argon filling efficiency.

[0073] Furthermore, the outlet end of the branch pipe 72 is connected to a bent pipe 721 for extending into the inner cavity of the mold 30. A cap 74 is fitted around the outer periphery of the bent pipe 721 to cover the upper opening of the mold 30.

[0074] The bend 721 allows argon gas to be introduced into the inner cavity of the mold 30 more accurately. At the same time, the cap 74 covers the upper opening of the mold 30 to prevent outside air from re-entering the mold 30, thereby improving the replacement efficiency of argon gas with the air inside the mold 30 and reducing the waste of argon gas.

[0075] Specifically, the cap 74 is also made of ceramic fiber felt, which is easy to cut into a shape that matches the top opening of the mold 30.

[0076] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An argon gas protection system for ingot casting, characterized in that, include: A protective cover (1) is fitted around the outer periphery of the drain outlet (10), and a sealing element (2) is provided between the protective cover (1) and the drain outlet (10); an annular air cavity (11) is provided inside the protective cover (1), and the annular air cavity (11) is located on the radial periphery of the drain outlet (10); A sealing curtain (3) is installed around the outer periphery of the protective cover (1), and its lower part has an extension (31) laid on the upper end face of the central injection pipe (20); and The first air inlet pipe (4) is connected to the protective cover (1) and communicates with the annular air chamber (11); The protective cover (1) and the sealing curtain (3) enclose a sealed casting cavity (12), which is located between the drain outlet (10) and the middle injection pipe (20). The annular gas cavity (11) has multiple air jet holes (13) that communicate with the sealed casting cavity (12). The first air inlet pipe (4) is used to introduce argon gas into the sealed casting cavity (12) through the annular gas cavity (11) and the air jet holes (13).

2. The argon gas protection system for ingot casting as described in claim 1, characterized in that, The plurality of jet holes (13) are divided into: A plurality of first air holes (131) are spaced apart on the inner peripheral wall of the annular air cavity (11), the main axis of the first air holes (131) extending in the horizontal direction; and Several second air holes (132) are spaced apart on the bottom wall of the annular air cavity (11), and the main axis of the second air holes (132) extends in the vertical direction.

3. The argon gas protection system for ingot casting as described in claim 1, characterized in that, The protective cover (1) has an upwardly extending connecting sleeve (14), which is sleeved on the outer periphery of the drain (10). An annular support plate (141) is connected to the inner peripheral wall of the connecting sleeve (14). The sealing element (2) is located between the connecting sleeve (14) and the drain (10) and above the annular support plate (141).

4. The argon gas protection system for die casting as described in claim 3, characterized in that, The seal (2) includes: A first sealing ring (21) is disposed around the inner circumferential wall of the connecting sleeve (14) and is used to fit onto the outer circumferential wall of the drain outlet (10); and The second sealing ring (22) is connected to the bottom of the first sealing ring (21) and is located above the annular support plate (141). The inner peripheral wall of the second sealing ring (22) is used to abut against the outer peripheral wall of the drain outlet (10).

5. The argon gas protection system for die casting as described in claim 3, characterized in that, The connecting sleeve (14) has a plurality of slots (142) on its peripheral wall. The slots (142) penetrate the top surface of the connecting sleeve (14) and extend along the circumference of the connecting sleeve (14). The plurality of slots (142) are used to engage with the plurality of protrusions (101) on the drain outlet (10) one by one.

6. The argon gas protection system for ingot casting as described in claim 1, characterized in that, The argon gas protection system for ingot casting also includes a fastening assembly (5), which includes: An elastic collar (51) is fitted around the outer periphery of the sealing curtain (3) and has two parallel mounting portions (511); and Fasteners (52) are provided through the two mounting portions (511) to tighten the two mounting portions (511) so that the sealing curtain (3) is tightly fitted onto the outer periphery of the protective cover (1) by means of the elastic collar (51).

7. The argon gas protection system for ingot casting as described in claim 1, characterized in that, The argon gas protection system for casting also includes two semi-pressure rings (6), which are symmetrically located on the radial periphery of the sealing curtain (3) and are used to press the extension (31) above the central injection pipe (20).

8. The argon gas protection system for ingot casting as described in claim 1, characterized in that, The argon gas protection system for casting also includes a mold argon filling assembly (7), which is used to introduce argon gas into the inner cavity of multiple molds (30).

9. An argon gas protection system for die casting as described in claim 8, characterized in that, The mold argon filling assembly (7) includes: An annular sleeve (71) is fitted around the periphery of the central injection tube (20); Multiple branch pipes (72) are respectively connected to the annular sleeve (71) and are respectively arranged in a one-to-one correspondence with multiple molds (30); and The second air intake pipe (73) is connected to the annular sleeve (71).

10. An argon gas protection system for die casting as described in claim 9, characterized in that, The outlet end of the branch pipe (72) is connected to a bent pipe (721) for extending into the inner cavity of the mold (30). A cover (74) is fitted around the outer periphery of the bent pipe (721) for covering the upper opening of the mold (30).

Images