Vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloy

Abstract

The utility model discloses a kind of high-purity aluminum-silicon-titanium alloy processing vacuum melting equipment, it is related to aluminum-silicon-titanium alloy processing field, the utility model includes platform, the top of platform is equipped with furnace body, and the inside of furnace body is equipped with inner lining, and one side of furnace body is equipped with inflation assembly. The utility model is provided with inflation assembly, when opening furnace cover, it is necessary to balance the pressure inside and outside furnace body, at this time, electric push rod is started, so that piston rod contracts and drives piston to move up, at this time, piston below is in negative pressure state, second check valve opens while first check valve is in closed state, and the inert gas in the inert gas storage tank outside is entered into the inside of cylinder by inlet pipe, when piston moves down, inert gas is filled into furnace body through gas pipe and first check valve, until the pressure balance inside and outside furnace, to eliminate the pressure difference inside and outside furnace, avoid sealing structure damage and mechanical impact risk, prolong equipment life, improve the safety when opening furnace cover simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of aluminum-silicon-titanium alloy processing, specifically a vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys. Background Technology

[0002] In high-purity aluminum-silicon-titanium alloys, elements such as aluminum and titanium are highly chemically reactive. When smelted in a conventional atmospheric environment, they easily react with gases such as oxygen and nitrogen to form oxide inclusions (such as Al2O3 and TiO2) and nitrides, leading to a decrease in alloy purity and deterioration of mechanical properties. Furthermore, the density difference between silicon and other elements can easily cause compositional segregation. Vacuum melting equipment can effectively isolate air by creating a vacuum environment to avoid oxidation and nitriding. At the same time, the vacuum conditions promote the volatilization and removal of hydrogen and low-melting-point impurities (such as lead and sodium) in the alloy. Combined with induction heating, uniform melting of the metal is achieved, ultimately producing high-purity aluminum-silicon-titanium alloys with low impurities and high performance. This results in high-purity, high-performance alloy materials that meet the stringent requirements of aerospace, nuclear energy, and other fields.

[0003] According to Chinese Patent No. CN216482220U, a vacuum melting device for processing high-purity aluminum-silicon-titanium alloy is disclosed. This utility model is equipped with a heating resistance wire, a second drive motor, a second rotating rod, stirring blades, a vacuum pump, and an air inlet pipe. The vacuum pump is used to evacuate the space formed by the furnace body and the furnace cover through the air inlet pipe, so that the space formed by the furnace cover and the furnace body is in a vacuum state. Then, the high-purity aluminum-silicon-titanium alloy in the furnace body is heated by the heating resistance wire, so that the solid high-purity aluminum-silicon-titanium alloy gradually becomes liquid. Furthermore, the second drive motor drives the second drive shaft to rotate, and the second drive shaft drives the second rotating rod to rotate, which in turn drives the stirring blades to rotate, thereby improving the uniformity of high-purity aluminum-silicon-titanium alloy melting.

[0004] Regarding the aforementioned patent content, since the furnace body is in a vacuum state during melting, and the furnace cover needs to be opened after melting to remove the object, but because the furnace body is in a vacuum state, there is a huge pressure difference between the inside and outside of the furnace. If the furnace cover is opened directly, air will rush in instantly, contaminating the high-purity aluminum-silicon-titanium alloy (generating oxide inclusions or nitrides). At the same time, the pressure impact may damage the sealing structure between the furnace cover and the furnace body (such as sealing rings and sealing grooves), and the mechanical impact caused by the pressure difference poses a safety hazard, thereby reducing the safety of opening the furnace cover. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys, so as to solve the technical problem that if the furnace cover is opened directly, air will rush in instantly and contaminate the high-purity aluminum-silicon-titanium alloys because the furnace body is in a vacuum state and there is a huge pressure difference between the inside and outside of the furnace.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys, comprising a platform, a furnace body installed on the top of the platform, an inner lining installed inside the furnace body, and an air filling assembly provided on one side of the furnace body. The air filling assembly includes a cylinder mounted above one side of the furnace body via a fixing plate. A top cover is mounted on the top of the cylinder via multiple bolts, and an electric push rod is mounted on the top of the top cover. An installation plate is mounted on the output end of the electric push rod via a piston rod, and a piston is mounted on the bottom of the installation plate via multiple bolts. A gas supply pipe connects the cylinder and the furnace body, and a first one-way valve and a gas flow sensor are respectively installed on the gas supply pipe. An air inlet pipe is connected to the lower side of one side of the cylinder, and a second one-way valve is installed on the air inlet pipe, and a flange is connected to one end of the air inlet pipe.

[0007] By adopting the above technical solution, one end of the air inlet pipe is connected to an external inert gas storage tank through a flange. When the furnace cover is opened, the pressure inside and outside the furnace body must be balanced first. At this time, the electric push rod is activated, which causes the piston rod to retract and thus drive the piston to move upward.

[0008] Furthermore, the outer wall of the piston is provided with a sealing ring, the outer wall of the sealing ring is in contact with the inner wall of the cylinder, and the sealing ring is made of fluororubber material.

[0009] By adopting the above technical solution, the sealing ring can improve the sealing performance between the piston and the cylinder, preventing gas below the piston from flowing upward through the gap between the piston and the cylinder.

[0010] Furthermore, an induction heating coil is installed inside the liner, and a temperature sensor is installed on one side of the inside of the liner.

[0011] By adopting the above technical solution, the induction heating coil realizes non-contact heating of metal materials through the principle of electromagnetic induction, while the temperature sensor can monitor the temperature inside the lining in real time.

[0012] Furthermore, the top of the liner is provided with an annular groove, a crucible is inserted inside the liner, and an annular plate is installed above the outer wall of the crucible, the annular plate being located inside the annular groove.

[0013] By adopting the above technical solution, when the crucible is placed inside the liner, the annular plate will be inserted into the annular groove to position the crucible.

[0014] Furthermore, a support frame is fixed to the top of the platform, and a hydraulic cylinder is installed on the top of the support frame. The output end of the hydraulic cylinder is fitted with a furnace cover via a piston rod.

[0015] By adopting the above technical solution, when the position of the furnace cover needs to be adjusted, the operator can start the hydraulic cylinder. The operation of the hydraulic cylinder can extend or retract the piston rod, thereby moving the furnace cover and achieving the purpose of adjusting the position of the furnace cover.

[0016] Furthermore, a vacuum gauge is installed on one side of the furnace cover, and a sealing groove is provided on the top of the furnace body, with a sealing ring inserted inside the sealing groove. The sealing ring is fixedly connected to the bottom of the furnace cover.

[0017] By adopting the above technical solution, the vacuum gauge is set up to enable real-time monitoring of the vacuum status inside the furnace.

[0018] Furthermore, a vacuum pump is installed on one side of the top of the platform, and the pump's suction end is connected to a suction pipe extending into the furnace body.

[0019] By adopting the above technical solution, the vacuum pump can extract gas from inside the furnace through the extraction pipe when it is working, so that a vacuum state can be formed inside the furnace.

[0020] Furthermore, a control console is provided on the other side of the top of the platform, which is electrically connected to a vacuum pump, a hydraulic cylinder, a temperature sensor, an induction heating coil, an electric push rod, a gas flow sensor, and a vacuum gauge.

[0021] By adopting the above technical solution, it is convenient for staff to control the vacuum pump, hydraulic cylinder, temperature sensor, induction heating coil, electric push rod, gas flow sensor and vacuum gauge through the console.

[0022] Furthermore, guide rods penetrating the support frame are installed on both sides of the top of the furnace cover.

[0023] By adopting the above technical solution, when the furnace cover moves, it can drive the guide rod to move, and the guide rod can guide the movement, thereby improving the stability of the furnace cover when it moves.

[0024] Furthermore, the outer wall of the piston is fitted to the inner wall of the cylinder.

[0025] By adopting the above technical solution, the piston can slide inside the cylinder.

[0026] In summary, the present invention has the following main advantages: 1. This utility model, by incorporating an inflation component, requires balancing the internal and external pressures of the furnace body before opening the furnace lid. At this point, an electric push rod is activated, causing the piston rod to retract and move the piston upwards. The area below the piston is under negative pressure, the second one-way valve opens while the first one-way valve closes, and inert gas from the external inert gas storage tank enters the furnace body through the inlet pipe. When the piston moves downwards, the inert gas is injected into the furnace body through the gas delivery pipe and the first one-way valve until the pressure inside and outside the furnace is balanced (the operator can monitor the pressure balance using a vacuum gauge). This eliminates the pressure difference between the inside and outside of the furnace, avoids damage to the sealing structure and the risk of mechanical impact, extends equipment life, and improves safety when opening the furnace lid. 2. This utility model incorporates a first one-way valve and a second one-way valve. The first one-way valve allows inert gas inside the cylinder to enter the furnace body through the gas supply pipe, while gas inside the furnace body cannot enter the cylinder body through the first one-way valve. The second one-way valve allows external inert gas to enter the cylinder body through the gas inlet pipe, while gas inside the cylinder body cannot be discharged through the second one-way valve. The sealing ring improves the sealing between the piston and the cylinder body, preventing gas below the piston from flowing upward through the gap between the piston and the cylinder body. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a schematic diagram of the overall orthographic structure of this utility model; Figure 3 This is a schematic diagram of the furnace cover structure of this utility model; Figure 4 This is a schematic diagram of the side structure of the cylindrical body of this utility model; Figure 5 This is a schematic diagram of the piston structure of this utility model; Figure 6 This is a schematic diagram of the cylindrical body structure of this utility model.

[0028] In the diagram: 1. Platform; 2. Furnace body; 3. Lining; 4. Vacuum pump; 5. Evacuation pipe; 6. Crucible; 7. Annular groove; 8. Annular plate; 9. Gas filling assembly; 901. Electric push rod; 902. Cylinder; 903. Gas supply pipe; 904. First one-way valve; 905. Top cover; 906. Second one-way valve; 907. Mounting plate; 908. Piston; 909. Sealing ring; 910. Inlet pipe; 911. Gas flow sensor; 10. Induction heating coil; 11. Temperature sensor; 12. Control console; 13. Furnace cover; 14. Support frame; 15. Hydraulic cylinder; 16. Vacuum gauge; 17. Sealing groove; 18. Guide rod; 19. Sealing ring; 20. Insulation layer; 21. Pressure relief valve. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] The embodiments of this utility model will be described below based on its overall structure.

[0031] Example 1: A vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys, such as Figures 1-6 As shown, the furnace includes a platform 1, a furnace body 2 is mounted on the top of the platform 1, and an inner lining 3 is installed inside the furnace body 2. An air-filling assembly 9 is provided on one side of the furnace body 2. The air-filling assembly 9 includes a cylinder 902 mounted on the upper side of the furnace body 2 by a fixing plate. A top cover 905 is mounted on the top of the cylinder 902 by multiple bolts. An electric push rod 901 is mounted on the top of the top cover 905. An installation plate 907 is mounted on the output end of the electric push rod 901 by a piston rod. A piston 908 is mounted on the bottom of the installation plate 907 by multiple bolts.

[0032] See Figures 1-6 A gas supply pipe 903 connects the cylinder 902 and the furnace body 2. A first one-way valve 904 and a gas flow sensor 911 are installed on the gas supply pipe 903. The gas flow sensor (911) can monitor the inert gas flow rate in real time. The first one-way valve 904 is designed to allow the inert gas inside the cylinder 902 to enter the furnace body 2 through the gas supply pipe 903, while the gas inside the furnace body 2 cannot enter the cylinder 902 through the first one-way valve 904. An inlet pipe 910 is connected to the lower side of one side of the cylinder 902, and a second one-way valve 906 is installed on the inlet pipe 910. One end of 910 is connected to a flange, and one end of the inlet pipe 910 is connected to an external inert gas storage tank (such as nitrogen) through the flange. The second one-way valve 906 is set so that the external inert gas can enter the interior of the cylinder 902 through the inlet pipe 910, while the gas inside the cylinder 902 cannot be discharged through the second one-way valve 906. When the furnace cover 13 is opened, the pressure inside and outside the furnace body 2 must be balanced first. At this time, the electric push rod 901 is activated, which causes the piston rod to retract and thus drive the piston 908 to move upward. The outer wall of the piston 908 fits against the inner wall of the cylinder 902 so that the piston 908 can slide inside the cylinder 902.

[0033] Specifically, an induction heating coil 10 is installed inside the liner 3, and a temperature sensor 11 is installed on one side of the inside of the liner 3. The induction heating coil 10 achieves non-contact heating of the metal material through the principle of electromagnetic induction, while the temperature sensor 11 can monitor the temperature inside the liner 3 in real time. An annular groove 7 is formed on the top of the liner 3, and a crucible 6 is inserted inside the liner 3. The crucible 6 can be made of silicon nitride ceramic or alumina ceramic material, and an annular plate 8 is installed on the upper part of the outer wall of the crucible 6. The annular plate 8 is located inside the annular groove 7. When the crucible 6 is placed inside the liner 3, the annular plate 8 will be engaged in the annular groove 7 to position the crucible 6. Platform 1 A support frame 14 is fixed to the top of the furnace body 2, and a hydraulic cylinder 15 is installed on the top of the support frame 14. The output end of the hydraulic cylinder 15 is connected to the furnace cover 13 via a piston rod. When the position of the furnace cover 13 needs to be adjusted, the operator can start the hydraulic cylinder 15. The operation of the hydraulic cylinder 15 can extend or retract the piston rod, thereby moving the furnace cover 13 and achieving the purpose of adjusting the position of the furnace cover 13. Multiple ventilation holes are provided on the lower part of the outer wall of the inner lining 3. The inner lining 3 is made of alumina ceramic material. The inner wall of the furnace body 2 is provided with a heat insulation layer 20, and the heat insulation layer 20 is made of graphite felt. At the same time, the surface of the graphite felt is coated with boron nitride coating. A pressure relief valve 21 is installed on the upper side of the other side of the furnace body 2.

[0034] See Figures 1-4 A vacuum gauge 16 is installed on one side of the furnace cover 13. A sealing groove 17 is provided on the top of the furnace body 2, and a sealing ring 19 is inserted into the sealing groove 17. The sealing ring 19 is fixedly connected to the bottom of the furnace cover 13 and is adapted to the sealing groove 17. The sealing ring 19 is an oxygen-free copper metal sealing ring to improve the sealing performance between the furnace cover 13 and the furnace body 2. The vacuum gauge 16 is set to monitor the vacuum status inside the furnace body 2 in real time. A vacuum pump 4 is installed on one side of the top of the platform 1, and the suction end of the vacuum pump 4 is connected to a suction pipe 5 extending into the furnace body 2. When pump 4 is working, it can draw gas from inside furnace body 2 through suction pipe 5 so that a vacuum state can be formed inside furnace body 2. On the other side of the top of platform 1, there is a control console 12. The control console 12 is electrically connected to vacuum pump 4, hydraulic cylinder 15, temperature sensor 11, induction heating coil 10, electric push rod 901, gas flow sensor 911 and vacuum gauge 16 respectively, so that the operator can control vacuum pump 4, hydraulic cylinder 15, temperature sensor 11, induction heating coil 10, electric push rod 901, gas flow sensor 911 and vacuum gauge 16 through control console 12.

[0035] Example 2: Based on the above embodiment 1, in order to improve the sealing between piston 908 and cylinder 902, the following structure will be set.

[0036] Specifically, the outer wall of the piston 908 is provided with a sealing ring 909. The outer wall of the sealing ring 909 fits against the inner wall of the cylinder 902. The sealing ring 909 is made of fluororubber material. The sealing ring 909 can improve the sealing between the piston 908 and the cylinder 902 and prevent gas below the piston 908 from flowing upward through the gap between the piston 908 and the cylinder 902.

[0037] Example 3: Based on the above embodiment 1, in order to improve the stability of the furnace cover 13 when it moves, it is necessary to guide the furnace cover 13, so the following structure will be set.

[0038] See Figures 1-3 Guide rods 18 that penetrate the support frame 14 are installed on both sides of the top of the furnace cover 13. When the furnace cover 13 moves, it can drive the guide rods 18 to move, and the guide rods 18 can guide the movement, thereby improving the stability of the furnace cover 13 when it moves.

[0039] The working principle of this utility model is as follows: First, before use, the operator can turn on the power supply, then put the aluminum-silicon-titanium alloy into the crucible 6 inside the furnace body 2. After the alloy is placed in, the hydraulic cylinder 15 is activated, causing the piston rod to extend and thus drive the furnace cover 13 to move down, so that the furnace cover 13 and the furnace body 2 are closed. At the same time, the sealing ring 19 is inserted into the sealing groove 17. Then, one end of the air inlet pipe 910 is connected to an external inert gas storage tank (such as nitrogen) through a flange. Then, the vacuum pump 4 is activated through the control console 12, and the gas inside the furnace body 2 is extracted through the air extraction pipe 5. Combined with the sealing fit between the furnace cover 13 and the furnace body 2 through the sealing ring 19 and the sealing groove 17, a vacuum environment is formed inside the furnace body 2 to isolate air and prevent alloy oxidation. Then, the induction heating coil 10 inside the lining 3 is activated to heat the aluminum-silicon-titanium alloy raw material in the crucible 6 in a non-contact manner through the electromagnetic induction principle, so as to melt the aluminum-silicon-titanium alloy raw material. At the same time, the temperature sensor 11 monitors the temperature inside the lining 3 in real time and feeds it back to the control console 12 to achieve precise temperature control. Before opening the furnace cover 13, the pressure inside and outside the furnace is balanced by the gas filling component 9. When the electric push rod 901 drives the piston 908 to move upward, the external inert gas is drawn into the cylinder 902 through the gas inlet pipe 910 and the second one-way valve 906. When the piston 908 moves downward, the inert gas is filled into the furnace body 2 through the gas delivery pipe 903 and the first one-way valve 904 until the pressure inside and outside the furnace is balanced (the staff can know the pressure balance status through the vacuum gauge 16). The gas flow sensor (911) can monitor the gas filling flow rate of the inert gas in real time. Then the hydraulic cylinder 15 is started, so that the furnace cover 13 moves upward. The guide rod 18 ensures the stability of the movement of the furnace cover 13. Then the staff can take out the material.

[0040] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys, comprising a platform (1), characterized in that: A furnace body (2) is installed on the top of the platform (1), and an inner lining (3) is installed inside the furnace body (2). An air-filling assembly (9) is provided on one side of the furnace body (2). The air-filling assembly (9) includes a cylinder (902) installed above one side of the furnace body (2) by a fixing plate. A top cover (905) is installed on the top of the cylinder (902) by multiple bolts. An electric push rod (901) is installed on the top of the top cover (905). The output end of the electric push rod (901) is installed with a piston rod. The cylinder (907) is connected to the furnace body (2) by a gas supply pipe (903), and a first one-way valve (904) and a gas flow sensor (911) are respectively installed on the gas supply pipe (903). An air inlet pipe (910) is connected to the lower side of the cylinder (902), and a second one-way valve (906) is installed on the air inlet pipe (910). A flange is connected to one end of the air inlet pipe (910).

2. The vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys according to claim 1, characterized in that: The piston (908) has a sealing ring (909) on its outer wall. The outer wall of the sealing ring (909) is in contact with the inner wall of the cylinder (902). The sealing ring (909) is made of fluororubber material.

3. The vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys according to claim 1, characterized in that: An induction heating coil (10) is installed inside the liner (3), and a temperature sensor (11) is installed on one side of the inside of the liner (3).

4. The vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys according to claim 1, characterized in that: The top of the liner (3) is provided with an annular groove (7), a crucible (6) is inserted inside the liner (3), and an annular plate (8) is installed above the outer wall of the crucible (6), the annular plate (8) is located inside the annular groove (7).

5. The vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys according to claim 1, characterized in that: The top of the platform (1) is fixed with a support frame (14), and a hydraulic cylinder (15) is installed on the top of the support frame (14). The output end of the hydraulic cylinder (15) is fitted with a furnace cover (13) via a piston rod.

6. The vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys according to claim 5, characterized in that: A vacuum gauge (16) is installed on one side of the furnace cover (13). A sealing groove (17) is provided on the top of the furnace body (2), and a sealing ring (19) is inserted inside the sealing groove (17). The sealing ring (19) is fixedly connected to the bottom of the furnace cover (13).

7. The vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys according to claim 1, characterized in that: A vacuum pump (4) is installed on one side of the top of the platform (1), and the vacuum pump (4) is connected to a suction pipe (5) extending into the furnace body (2).

8. The vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys according to claim 1, characterized in that: The platform (1) is provided with a control console (12) on the other side of the top. The control console (12) is electrically connected to the vacuum pump (4), hydraulic cylinder (15), temperature sensor (11), induction heating coil (10), electric push rod (901), gas flow sensor (911) and vacuum gauge (16).

9. The vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys according to claim 5, characterized in that: Guide rods (18) that penetrate the support frame (14) are installed on both sides of the top of the furnace cover (13).

10. The vacuum melting equipment for processing high-purity aluminum-silicon-titanium alloys according to claim 1, characterized in that: The outer wall of the piston (908) is in contact with the inner wall of the cylinder (902).

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