A melting furnace for casting aluminum alloy based on electromagnetic stirring technology

Abstract

The present invention relates to the technical field of casting alloys, and discloses a melting furnace for casting aluminum alloys based on electromagnetic stirring technology, including a crucible, two circulation layer shells are fixedly installed on the outer wall of the crucible, a gas outlet layer is fixedly installed on the top of the two circulation layer shells, and a fixed plate is fixedly installed on the outer wall of the top of the circulation layer shell. The present invention arranges the circulation layer shell and the gas outlet layer so that the metal solution inside the crucible is fully isolated and sealed, and the metal smelting effect is effectively improved. By arranging the upper conductive sheet, the heat preservation tube, the lower conductive sheet, the small suction fan, the heat-conducting air pipe, the air storage bag and other structures, the temperature difference between the metal solution and the external environment is effectively reduced, and the metal solution is prevented from losing too much heat and causing the metal solution to produce scum. By arranging the heat-conducting air pipe and the air ducting cavity, the metal solution is kept at a high temperature for a longer time, and the metal solution is prevented from semi-solidifying due to premature cooling, which not only hinders normal flow, but also has an adverse effect on the next casting work.

Description

Technical Field

[0001] The invention relates to the technical field of casting alloys, and in particular to a melting furnace for casting aluminum alloys based on electromagnetic stirring technology. Background Art

[0002] Existing aluminum alloy casting processes mostly use electromagnetic stirring technology. In the casting process based on electromagnetic stirring technology, the aluminum alloy needs to be melted and refined. For aluminum alloy melting, a vacuum induction melting furnace is generally used. The existing vacuum induction melting furnace is mainly composed of a vacuum system, a rotating shaft, a feeding device, a crucible, a sensor, a temperature measuring rotating shaft, an electromagnetic heating device, a furnace shell and other structures. A vacuum environment is created around the crucible through the vacuum system, and electromagnetic induction is generated through the electromagnetic heating device. The electromagnetic induction is used to generate eddy currents inside the crucible, and then the metal is heated and melted, thereby achieving a melting effect.

[0003] When the existing vacuum induction melting furnace is in use, the crucible is located in the vacuum chamber, and the vacuum chamber is created by the vacuum system continuously extracting the air inside the vacuum chamber. Although the vacuum chamber has good sealing performance, when sampling, temperature measurement or feeding is required, the vacuum chamber needs to be opened and the external conveying device needs to be sent into the interior. At this time, the sealing performance of the vacuum chamber cannot be completely guaranteed, and the external air penetrates into the vacuum chamber. Although the vacuum system keeps suction, air still penetrates into the crucible, which causes the metal being melted inside the crucible to oxidize, thereby destroying the metal smelting effect and causing the refining effect to decrease. In addition, after the metal smelting is completed, when the crucible is poured out by using the rotating shaft, because the liquid outlet nozzle is separated from the flow channel cavity by a certain distance, when the molten metal is poured out, there is a certain heat loss, and the temperature difference of the molten metal flowing to the flow channel cavity is large, which causes scum to be easily generated on the surface of the molten metal, thereby causing the quality of the molten metal to decrease, resulting in the problem of reduced efficiency of aluminum alloy casting. Summary of the invention

[0004] In view of the shortcomings of the existing melting furnace mentioned in the background technology during use, the present invention provides a melting furnace for casting aluminum alloy based on electromagnetic stirring technology, which has the advantages of ensuring the sealing of the top of the crucible in real time, improving the melting effect, and effectively reducing the temperature difference generated when the solution is poured, thereby improving the casting efficiency, thereby solving the technical problems raised in the above-mentioned background technology.

[0005] The present invention provides the following technical solution: a smelting furnace for casting aluminum alloy based on electromagnetic stirring technology, comprising a crucible, two circulation layer shells are fixedly installed on the outer wall of the crucible, and an air outlet layer is fixedly installed on the top of the two circulation layer shells, a fixing plate is fixedly installed on the outer wall of the top of the circulation layer shell, and rotating shafts are fixedly installed on both sides of the bottom end of the fixing plate, a discharge nozzle is fixedly installed on one side of the top of the crucible, an upper conductive sheet is fixedly installed on the bottom surface of one end of the discharge nozzle, a heat preservation tube is fixedly installed below the bottom end of the upper conductive sheet, a lower conductive sheet is fixedly installed on one side of the top of the heat preservation tube, a small suction fan is fixedly installed on one side of the top of the tube wall chamber of the heat preservation tube, a heat-conducting air pipe is fixedly installed in the tube wall chamber of the heat preservation tube, an air induction cavity is fixedly installed on one end of the heat-conducting air pipe, a flow channel cavity is fixedly installed below the bottom end of the heat preservation tube, and an air storage bag is fixedly installed on one side of the flow channel cavity.

[0006] Preferably, the shape of the circulation layer shell is semi-arc, and the curvature of the circulation layer shell is adapted to the outer curvature of the crucible, the interior of the circulation layer shell is hollow, and the top of the circulation layer shell is connected to the bottom of the gas outlet layer, there are two gas outlet layers in total, and they are relatively distributed, an opening is provided on the inner side wall of the gas outlet layer, inert gas is passed through the interior of the circulation layer shell, a conduit is provided at the bottom end of one of the circulation layer shells, and the other end of the conduit is connected to the bottom surface of the gas storage bag.

[0007] Preferably, the upper conductive sheet is trapezoidal in shape, the lower conductive sheet is mountain-shaped, the shape and size of the middle part of the lower conductive sheet match those of the upper conductive sheet, and the inclination of one side surface of the upper conductive sheet matches the angle of rotation when the crucible is tilted.

[0008] Preferably, one side surface of the lower conductive sheet is fixedly connected to the top surface of the small suction fan through a wire, and one side surface of the small suction fan is fixedly connected to one side surface of the top of the air storage bag through a conduit, and the two are interconnected.

[0009] Preferably, the heat-insulating cylinder is cylindrical in shape, and the interior of the cylinder wall of the heat-insulating cylinder is hollow. The outer wall of the heat-insulating cylinder has heat-insulating properties, while the inner wall has heat-conducting properties.

[0010] Preferably, the heat-conducting air duct is spiral in shape, and the interior of the heat-conducting air duct is hollow, one end of the heat-conducting air duct is connected to the interior of the small suction fan, and the other end of the heat-conducting air duct is connected to the inner cavity of the air ducting cavity, the shape of the air ducting cavity is rectangular, and the shape and size of the air ducting cavity are adapted to the size of the inner cavity of the flow channel cavity, and the bottom end opening of the air ducting cavity is inclined.

[0011] The present invention has the following beneficial effects:

[0012] 1. The present invention arranges a circulation layer shell and a gas outlet layer, and utilizes the specific distribution of the circulation layer shell and the gas outlet layer, so that when the high-speed low-temperature gas flows, it can flow along the inner cavity of the circulation layer shell and through the opening on the inner wall of the gas outlet layer, thereby achieving the effect of circulating around the outside of the crucible. The annular flow of the gas and the low gas temperature can conduct and carry the heat energy on the outer wall of the crucible, effectively achieving the effect of reducing the high temperature of the outer wall of the crucible, avoiding the problem that the electromagnetic device inside the crucible generates too much heat energy during operation, resulting in excessive temperature of the outer wall, causing the shell of the crucible to be overheated and damaged, and greatly reducing the operation efficiency of the electromagnetic device. At the same time, the high-speed flow of the gas is utilized to form a layer of gas wall above the top of the crucible, thereby isolating the external air and preventing the air from continuing to penetrate downward through the gas wall. Because the inert gas is not easy to react with the metal, the metal solution inside the crucible is fully isolated and sealed, thereby effectively improving the metal smelting effect and making the refining effect better.

[0013] 2. The present invention arranges an upper conductive sheet, a heat preservation tube, a lower conductive sheet, a small suction fan, a heat-conducting air pipe, an air storage bag and other structures, utilizes the heat energy generated on the surface of the crucible to heat the gas to form high-temperature gas, and stores it in the inner cavity of the air storage bag. When the metal inside the crucible is completely melted, the crucible tilts forward to drive the upper conductive sheet downward to contact the lower conductive sheet, so that the small suction fan is powered on to move, continuously absorbs the gas inside the air storage bag, and continuously infuses the gas into the inner cavity of the heat-conducting air pipe. The heat-conducting air pipe is used to make the gas flow from top to bottom around the inner wall of the heat preservation tube. Since the gas stored in the air storage bag has a high temperature, the gas flowing in the heat-conducting air pipe also has a high temperature, so the ambient temperature of the inner cavity of the heat preservation tube is relatively high. Therefore, when the metal solution passes through the heat preservation tube and flows downward, the temperature difference between the metal solution and the external environment can be effectively reduced, so as to avoid excessive heat loss of the metal solution, thereby preventing the metal solution from generating scum, and further affecting the quality of the metal solution.

[0014] 3. The present invention provides a heat-conducting air pipe and an air-inducing cavity. Since the position of the crucible is fixed when it is tipped, the upper conductive sheet and the lower conductive sheet are always in contact with each other, and then the small suction fan will always absorb the gas inside the air storage bag, so that the circulation flow inside the heat-conducting air pipe remains unchanged. In the whole tipping process, the heat preservation tube always maintains a good effect of reducing the temperature difference, and the gas flowing out of the inner cavity of the heat-conducting air pipe will flow into the inner cavity of the air-inducing cavity. The gas passes through the air-inducing cavity, and due to the shape of the air-inducing cavity, the gas adheres to the surface of the metal solution in the inner cavity of the flow channel cavity and flows forward. Due to the characteristics of the inert gas itself and the high temperature of the gas, the metal solution in the inner cavity of the flow channel is isolated by the lateral flow of the gas, and is not easily contacted with the external air, thereby avoiding the problem of secondary oxidation when the metal solution flows out. Moreover, when the metal solution gradually spreads out and flows inside the flow channel cavity, the high-temperature gas can prevent the metal solution from cooling down rapidly, and can keep the high temperature of the metal solution for a longer time, thereby avoiding the metal solution from semi-solidifying due to premature cooling, which not only hinders normal flow, but also has an adverse effect on the next step of casting work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a schematic front view of the structure section of the present invention;

[0017] Figure 3 It is a three-dimensional schematic diagram of the cross-section of the structure of the present invention;

[0018] Figure 4 It is a top cross-sectional top view schematic diagram of the structure of the present invention;

[0019] Figure 5 For the present invention Figure 2 A partial enlarged schematic diagram of the structure at center A;

[0020] Figure 6 For the present invention Figure 2 A partial enlarged schematic diagram of the structure at point B in the middle.

[0021] In the figure: 1. crucible; 2. circulation layer shell; 3. gas outlet layer; 4. fixed plate; 5. rotating shaft; 6. discharge nozzle; 7. upper conductive sheet; 8. heat preservation tube; 9. lower conductive sheet; 10. small suction fan; 11. heat-conducting air pipe; 12. air induction cavity; 13. flow channel cavity; 14. air storage bag. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-Figure 6 A melting furnace for casting aluminum alloy based on electromagnetic stirring technology comprises a crucible 1, two circulation layer shells 2 are fixedly installed on the outer wall of the crucible 1, a gas outlet layer 3 is fixedly installed on the top of the two circulation layer shells 2, a fixing plate 4 is fixedly installed on the outer wall of the top of the circulation layer shell 2, a rotating shaft 5 is fixedly installed on both sides of the bottom end of the fixing plate 4, a discharge nozzle 6 is fixedly installed on one side of the top of the crucible 1, an upper conductive sheet 7 is fixedly installed on the bottom surface of one end of the discharge nozzle 6, a heat preservation tube 8 is fixedly installed below the bottom end of the upper conductive sheet 7, a lower conductive sheet 9 is fixedly installed on one side of the top of the heat preservation tube 8, a small suction fan 10 is fixedly installed on one side of the top of the tube wall chamber of the heat preservation tube 8, a heat conduction air pipe 11 is fixedly installed in the tube wall chamber of the heat preservation tube 8, and a heat conduction air pipe 11 is fixedly installed at one end of the heat conduction air pipe 11 The air cavity 12 and the heat preservation tube 8 are fixedly provided with a flow groove cavity 13 below the bottom end thereof, and an air storage bag 14 is fixedly provided on one side of the flow groove cavity 13. The surface of the air storage bag 14 is elastic. When the amount of gas collected inside the air storage bag 14 is too much, that is, when the crucible 1 is tipped over, in addition to the amount of gas continuously circulating in the heat-conducting air pipe 11, some gas may remain. At this time, the air storage bag 14 expands outwards, and the air pressure inside the air storage bag 14 is relatively high. When the crucible 1 is tipped over downwards, the surface of the crucible 1 may be pressed against the surface of the air storage bag 14. If the rotating shaft 5 generates mechanical vibration, the air pressure of the air storage bag 14 may be used for buffering, thereby preventing the crucible 1 from generating strong vibration when tipping over, thereby causing the metal solution inside the crucible 1 to be shaken out, thereby effectively improving the tipping safety of the crucible 1.

[0024] In addition, by providing the upper conductive sheet 7, the heat preservation tube 8, the lower conductive sheet 9, the small suction fan 10, the heat-conducting air pipe 11, the air storage bag 14 and other structures, the heat energy generated by the surface of the crucible 1 is utilized to make the gas inside the circulating layer shell 2 conduct heat when flowing, thereby forming high-temperature gas, and transmitting it to the inner cavity of the air storage bag 14 through the conduit for storage. When the metal inside the crucible 1 is melted, the crucible 1 is driven to tilt forward as a whole through the rotating shaft 5 to pour out the molten metal. When the crucible 1 flips forward, the crucible 1 drives the discharge nozzle 6 to tilt downward, thereby driving the upper conductive sheet 7 downward to plug into the lower conductive sheet 9. The small suction fan 10 is powered on and moves, thereby sucking back the gas inside the air storage bag 14 and continuously injecting the gas into the inner cavity of the heat-conducting air pipe 11. The spiral shape of the heat-conducting air pipe 11 is utilized to make the gas continuously flow from top to bottom around the inner wall of the heat-insulating tube 8. Since the gas transmitted inside the air storage bag 14 has a high temperature, the gas continuously flowing inside the heat-conducting air pipe 11 also has a high temperature. Then, through the conduction of the inner wall of the heat-insulating tube 8 and the heat insulation of the outer wall, the ambient temperature of the inner cavity of the heat-insulating tube 8 is made higher, thereby effectively reducing the temperature difference between the metal solution and the external environment and avoiding excessive heat loss of the metal solution.

[0025] In addition, since the position of the crucible 1 is fixed when it is tipped, and the upper conductive sheet 7 and the lower conductive sheet 9 are always in contact with each other, the small suction fan 10 always absorbs the gas inside the air storage bag 14, so that the circulation flow inside the heat-conducting air pipe 11 remains unchanged, and the heat-insulating tube 8 always maintains a good effect of reducing the temperature difference during the entire tipping process. When the metal solution passes through the heat-insulating tube 8 and flows into the inner cavity of the flow channel cavity 13, at this time, the gas in the inner cavity of the heat-conducting air pipe 11 flows to the tail end, and then flows into the inner cavity of the air induction cavity 12, and passes through the air induction cavity 12, and then The gas is guided to the inner surface of the flow channel cavity 13, so that the gas adheres to the surface of the metal solution in the inner cavity of the flow channel cavity 13 and flows forward. The characteristics of the inert gas are utilized, and the gas still has a high temperature, so that the metal solution in the inner cavity of the flow channel cavity 13 is not easy to contact with the external air, and secondary oxidation is avoided when it flows out. When the metal solution gradually spreads out and flows inside the flow channel cavity 13, the high-temperature gas can keep the metal solution at a high temperature for a longer time, and avoid the metal solution from cooling down too early, which affects the next step of casting.

[0026] See also Figure 3-Figure 4, wherein the shape of the circulation layer shell 2 is semi-arc, and the curvature of the circulation layer shell 2 is adapted to the outer curvature of the crucible 1, the interior of the circulation layer shell 2 is hollow, and the top of the circulation layer shell 2 is connected to the bottom of the gas outlet layer 3, there are two gas outlet layers 3, and they are relatively distributed, an opening is provided on the inner side wall of the gas outlet layer 3, the interior of the circulation layer shell 2 is passed with inert gas, a conduit is provided at the bottom end of one circulation layer shell 2, and the other end of the conduit is connected to the bottom surface of the gas storage bag 14, by arranging the circulation layer shell 2 and the gas outlet layer 3, the high-speed low-temperature gas passes through the circulation layer shell 2 located on one side of the outside of the crucible 1, and passes through the gas outlet layer 3 provided at the top of the circulation layer shell 2, and through the opening on the inner side wall of the gas outlet layer 3, the gas flows out horizontally, and because the gas has a high speed, it can quickly pass through the crucible 1 The top opening of the crucible 1 is formed, and the gas rushes to the other side of the crucible 1. At this time, the gas rushes into the opening on the inner wall of the gas outlet layer 3 at the top of the circulation layer shell 2 on the other side of the crucible 1, and then flows into the inner cavity of the circulation layer shell 2 on the other side of the crucible 1, so as to achieve the effect of annular flow of gas around the outside of the crucible 1. Through the continuous annular flow of the gas and the low temperature of the gas, the heat energy on the outer wall of the crucible 1 can be conducted and carried, so as to reduce the high temperature of the outer wall of the crucible 1, avoid excessive heat energy generated by the electromagnetic device inside the crucible 1 when it is running, and a large amount of heat energy is conducted to the outer wall, resulting in excessive temperature of the outer wall, which can easily cause damage to the shell of the crucible 1, and is not conducive to the long-term use of the electromagnetic device inside the crucible 1, and reduces the operation efficiency of the electromagnetic device.

[0027] In addition, when the gas circulates over the top of the crucible 1, due to the high-speed flow of the gas, an air wall is formed over the top of the crucible 1. When external air infiltrates downward, the rapid flow of the inert gas is used to isolate the external air, thereby preventing the air from continuing to infiltrate downward through the air wall. Furthermore, since the inert gas does not easily react with the metal, the metal solution inside the crucible 1 can be effectively isolated, thereby preventing external air from infiltrating into the crucible 1 when sampling, measuring temperature or adding materials for the second time, and contacting with the metal solution to cause oxidation of the metal solution, thereby destroying the metal smelting effect and greatly reducing the refining effect.

[0028] See also Figure 5-Figure 6 The upper conductive sheet 7 is in a trapezoidal shape, the lower conductive sheet 9 is in a "mountain" shape, and the shape and size of the middle part of the lower conductive sheet 9 are adapted to the shape and size of the upper conductive sheet 7. The inclination of one side surface of the upper conductive sheet 7 is adapted to the angle of rotation when the crucible 1 is tilted, so that when the crucible 1 is used to pour the metal solution, the upper conductive sheet 7 and the lower conductive sheet 9 can be adapted to each other and touch each other.

[0029] See also Figure 5-Figure 6One side surface of the lower conductive sheet 9 is fixedly connected to the top surface of the small suction fan 10 through a wire, and one side surface of the small suction fan 10 is fixedly connected to the top side surface of the air storage bag 14 through a catheter, and the two are interconnected.

[0030] See also Figure 2-Figure 3 The heat-insulating tube 8 is cylindrical in shape, and the interior of the tube wall of the heat-insulating tube 8 is hollow. The outer wall of the heat-insulating tube 8 has heat-insulating properties, while the inner wall thereof has heat-conducting properties.

[0031] See also Figure 2-Figure 3 The heat-conducting air pipe 11 is spiral in shape, and the interior of the heat-conducting air pipe 11 is hollow. One end of the heat-conducting air pipe 11 is connected to the interior of the small suction fan 10, and the other end of the heat-conducting air pipe 11 is connected to the inner cavity of the air-inducing cavity 12. The shape of the air-inducing cavity 12 is rectangular, and the shape and size of the air-inducing cavity 12 are adapted to the inner cavity size of the flow channel cavity 13, and the bottom end opening of the air-inducing cavity 12 is inclined.

[0032] The working principle of the method of the present invention is as follows:

[0033] When aluminum alloy casting is performed, the metal raw material to be smelted is placed in the crucible 1. After the raw material is placed, the existing gas supply pump is fixedly connected to the bottom end of the circulation layer shell 2 located on the outer side of the crucible 1. After confirming that the connection is completed, the existing vacuum chamber is closed, the existing vacuum system is started, and the vacuum chamber is evacuated. At the same time, the existing electromagnetic device is started to heat the metal raw material in the crucible 1 to melt the metal raw material into a liquid state. At the same time, the existing gas supply pump is started to keep the low-temperature gas at a high speed and continuously pour it into the inner cavity of the circulation layer shell 2 on one side, so that the gas flows through the circulation layer on the outer side of the crucible 1. The gas flows into the inner cavity of the shell 2, and passes through the inner cavity of the circulation layer shell 2 to the opening on the inner wall of the gas outlet layer 3 at the top of the circulation layer shell 2. Through the opening, because the gas maintains a high speed and the opening distance of the crucible 1 is limited, the gas can quickly flow through the top of the crucible 1, and rush to the opening on the inner wall of the gas outlet layer 3 at the top of the circulation layer shell 2 on the other side of the outside of the crucible 1, and then flow into the inner cavity of the circulation layer shell 2 on the other side of the outside of the crucible 1. In summary, the gas circulates in a ring shape outside the crucible 1, and the outer wall of the crucible 1 is cooled by the continuous flow of the gas in a ring shape, thereby improving the operating efficiency of the electromagnetic device.

[0034] When the gas flows into the inner cavity of the circulation layer shell 2 located on the other side of the crucible 1, the gas is transmitted to the inner cavity of the gas storage bag 14 through the conduit provided at the bottom end of the circulation layer shell 2, and the gas is temporarily stored in the gas storage bag 14. At this time, the gas contains high temperature because it absorbs heat and cools the crucible 1.

[0035] When the metal inside the crucible 1 is completely melted, at this time, the existing electric setting is used to drive the rotating shaft 5 to rotate, and then the rotating shaft 5 drives the crucible 1 to tilt forward as a whole, so that the metal solution inside the crucible 1 is completely poured out, and when the crucible 1 flips forward, the crucible 1 will drive the discharge nozzle 6 to tilt downward, and when the discharge nozzle 6 tilts, the discharge nozzle 6 drives the upper conductive sheet 7 downward, and when the crucible 1 completes a certain angle of inclination and fixes the position, at this time, the upper conductive sheet 7 and the lower conductive sheet 9 are plugged into contact, and a path is formed at this time, and the current provided by the external existing power supply begins to flow, and then through the conduction of the upper conductive sheet 7 and the lower conductive sheet 9, the current flows through the small suction fan 10, The small suction fan 10 is powered on and operated, and the internal blades of the small suction fan 10 rotate, thereby generating negative pressure to start sucking the gas inside the air storage bag 14, and continuously infusing this gas into the inner cavity of the heat-conducting air pipe 11. The gas is guided by the spiral tube body of the heat-conducting air pipe 11 to continuously flow from top to bottom around the inner wall of the insulation tube 8. Since the gas transmitted inside the air storage bag 14 has a high temperature, the gas continuously flowing inside the heat-conducting air pipe 11 also has a high temperature. Through the conduction of the inner wall of the insulation tube 8 and the heat insulation of the outer wall, the ambient temperature of the inner cavity of the insulation tube 8 is higher, thereby effectively reducing the temperature difference between the metal solution and the external environment, and avoiding excessive heat loss of the metal solution.

[0036] When the gas flows to the tail end of the heat-conducting air pipe 11, that is, flows out of the inner cavity of the heat-conducting air pipe 11, at this time, the gas flows into the inner cavity of the air inlet cavity 12 through the heat-conducting air pipe 11, and then passes through the air inlet cavity 12, and the gas is guided to the inner cavity surface of the flow groove cavity 13, and adheres to the surface of the metal solution in the inner cavity of the flow groove cavity 13 to flow forward, so that the metal solution in the inner cavity of the flow groove cavity 13 is not easy to contact with the external air, and the high temperature is maintained for a longer time.

[0037] When the metal smelting is completed, just turn off the existing air supply pump.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A melting furnace for casting aluminum alloy based on electromagnetic stirring technology, comprising a crucible (1), characterized in that: Two circulation layer shells (2) are fixedly mounted on the outer wall of the crucible (1); a gas outlet layer (3) is fixedly mounted on the top of the two circulation layer shells (2); a fixing plate (4) is fixedly mounted on the outer wall of the top of the circulation layer shell (2); rotating shafts (5) are fixedly mounted on both sides of the bottom of the fixing plate (4); a discharge nozzle (6) is fixedly mounted on one side of the top of the crucible (1); an upper conductive sheet (7) is fixedly mounted on the bottom surface of one end of the discharge nozzle (6); a heat preservation tube (8) is fixedly mounted below the bottom end of the upper conductive sheet (7); and a heat preservation tube (8) is fixedly mounted on one side of the top of the heat preservation tube (8). A lower conductive sheet (9) is fixedly installed, a small suction fan (10) is fixedly installed on one side of the top of the cylinder wall chamber of the heat-insulating cylinder (8), a heat-conducting air pipe (11) is fixedly installed in the cylinder wall chamber of the heat-insulating cylinder (8), an air induction chamber (12) is fixedly installed at one end of the heat-conducting air pipe (11), a flow channel chamber (13) is fixedly installed below the bottom end of the heat-insulating cylinder (8), an air storage bag (14) is fixedly installed on one side of the flow channel chamber (13), and a conduit is provided at the bottom end of one of the circulation layer shells (2), and the other end of the conduit is connected to the bottom surface of the air storage bag (14); One side surface of the small suction fan (10) is fixedly connected to one side surface of the top end of the air storage bag (14) via a conduit, and the two are interconnected.

2. The melting furnace for casting aluminum alloy based on electromagnetic stirring technology according to claim 1, characterized in that: The shape of the circulation layer shell (2) is semi-arc, and the curvature of the circulation layer shell (2) is matched with the outer curvature of the crucible (1). The interior of the circulation layer shell (2) is hollow, and the top end of the circulation layer shell (2) is connected to the bottom end of the gas outlet layer (3). There are two gas outlet layers (3) in total and they are relatively distributed. An opening is provided on the inner side wall of the gas outlet layer (3), and an inert gas is passed through the interior of the circulation layer shell (2).

3. The melting furnace for casting aluminum alloy based on electromagnetic stirring technology according to claim 1, characterized in that: The upper conductive sheet (7) is in the shape of a trapezoid, the lower conductive sheet (9) is in the shape of a "mountain", the shape and size of the middle portion of the lower conductive sheet (9) are adapted to the shape and size of the upper conductive sheet (7), and the inclination of a surface on one side of the upper conductive sheet (7) is adapted to the angle of rotation of the crucible (1) when it is tilted.

4. The melting furnace for casting aluminum alloy based on electromagnetic stirring technology according to claim 1, characterized in that: One side surface of the lower conductive sheet (9) is fixedly connected to the top surface of the small suction fan (10) via a wire.

5. The melting furnace for casting aluminum alloy based on electromagnetic stirring technology according to claim 1, characterized in that: The heat-insulating cylinder (8) is cylindrical in shape, and the interior of the cylinder wall of the heat-insulating cylinder (8) is hollow; the outer wall of the heat-insulating cylinder (8) has heat-insulating properties, while the inner wall has heat-conducting properties.

6. The melting furnace for casting aluminum alloy based on electromagnetic stirring technology according to claim 1, characterized in that: The heat-conducting air pipe (11) is spiral in shape, and the interior of the heat-conducting air pipe (11) is hollow; one end of the heat-conducting air pipe (11) is connected to the interior of the small suction fan (10), and the other end of the heat-conducting air pipe (11) is connected to the inner cavity of the air induction cavity (12); the shape of the air induction cavity (12) is rectangular, and the shape and size of the air induction cavity (12) are compatible with the size of the inner cavity of the flow channel cavity (13); the bottom end opening of the air induction cavity (12) is inclined.

Images