Degassing, impurity removing and purifying device for regenerated aluminum alloy melt

Abstract

The invention provides a degassing and impurity-removing purification device for a regenerated aluminum alloy melt, and belongs to the technical field of aluminum alloy processing. The gas and impurity removal purification device comprises a base, a lead screw motor, a movable block, a supporting cantilever, a chain motor, a graphite shaft and a third heat exchange structure. And the third heat exchange structure is arranged near the end part of the free end of the supporting cantilever so as to reduce the temperature of the joint of the graphite shaft and the second bearing. Rotation of the graphite shaft is achieved through cooperation of the driving chain wheel, the driven chain wheel and the transmission chain, compared with a traditional gear transmission structure, the probability of jamming at the high temperature is reduced, the chain motor is away from the high-temperature area where the free end of the supporting cantilever is located, the service life is prolonged, and the normal working state is guaranteed. And meanwhile, the temperature of the joint of the graphite shaft and the second bearing can be regulated and controlled through a third heat exchange structure, and the situation that the graphite shaft and the second bearing are stuck due to too high temperature is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy processing, and in particular to a degassing, impurity removal and purification device for recycled aluminum alloy melt. Background Art

[0002] Recycled aluminum alloy is smelted and prepared with recycled scrap aluminum as the main raw material. Since the aluminum alloy melt contains a large amount of gas and inclusions, the aluminum alloy melt must be degassed and purified to reduce the gas and impurity content of the recycled aluminum alloy and avoid the formation of defects such as pores, holes, and looseness.

[0003] For example, the Chinese utility model (name: "A device for refining, degassing and impurity removal of aluminum alloy" announcement number: CN208532903U, announcement date: 20190222) is a device for refining, degassing and impurity removal of aluminum alloy, which includes a shell, the right end of the shell is fixedly connected with a feed port, the left end of the shell is fixedly connected with an exhaust port, the lower end of the shell is fixedly connected with a discharge port, the discharge port is connected with a valve, the upper end of the shell is drilled with a bearing groove, the bottom end of the bearing groove is rotatably connected to an air storage tank, the upper end of the shell is fixedly connected to a motor base, the upper end of the motor base is fixedly connected to a motor, the power output end of the motor is fixedly connected to a driving gear, the air storage tank is fixedly connected to a driven gear, the bottom end of the bearing groove is drilled with a second through hole, the lower middle part of the air storage tank is fixedly connected with a stirring shaft, the upper end of the stirring shaft is drilled with an exhaust groove, the inner end of the exhaust groove is drilled with a plurality of exhaust holes, and the stirring shaft is fixedly connected with a plurality of stirring rods However, since the ambient temperature during aluminum alloy smelting is relatively high, the gear transmission mechanism will run at high temperature for a long time, which will lead to the risk of mechanical transmission jamming and affect the aluminum alloy smelting process. Summary of the invention

[0004] The present invention aims to provide a degassing and impurity removal purification device for recycled aluminum alloy melt. The rotation of the graphite shaft is achieved by the cooperation of the driving sprocket, the driven sprocket and the transmission chain. Compared with the traditional gear transmission structure, the probability of getting stuck at high temperature is reduced, and the chain motor is far away from the high temperature area where the free end of the supporting cantilever is located, which is conducive to extending the service life and ensuring normal working state. At the same time, the third heat exchange structure provided in the present invention can regulate the temperature of the connection between the graphite shaft and the second bearing to prevent the temperature from being too high and getting stuck.

[0005] The technical solution adopted by the present invention is: A degassing, impurity removal and purification device for recycled aluminum alloy melt, comprising: A base, wherein two parallel support plates are vertically arranged on the upper surface of the base; a top plate is arranged on the top of the two support plates; and a guide column is vertically arranged between the top plate and the upper surface of the base; A lead screw motor, wherein the lead screw motor is arranged above the top plate, and a lead screw connected to a power output end thereof passes through the top plate and is vertically movably connected to the upper surface of the base; A movable block, the movable block is slidably arranged on the lead screw and the guide column; A supporting cantilever, one end of which is connected to the movable block and is provided with a first bearing; a second bearing is provided near the free end of the supporting cantilever; and a gas chamber for introducing an inert gas is also provided above the free end of the supporting cantilever; A chain motor, wherein the chain motor is arranged above one end of the supporting cantilever connected to the movable block, and the lower end of the rotating shaft connected to the power output end of the chain motor is inserted into the first bearing; a driving sprocket is arranged on the rotating shaft; A graphite shaft, wherein the graphite shaft is provided with a through air passage along its own axial center direction; the upper portion of the graphite shaft is inserted into the second bearing, and the top portion thereof is inserted into the air chamber to form a sliding contact seal; a driven wheel sprocket is also provided near the top of the graphite shaft; a matching transmission chain is sleeved between the driven wheel sprocket and the driving sprocket; a graphite rotor is provided at the lower end of the graphite shaft; A third heat exchange structure is arranged near the free end of the support cantilever to reduce the temperature of the connection between the graphite shaft and the second bearing.

[0006] Furthermore, the third heat exchange structure comprises: Second heat dissipation holes, which are evenly opened on the free end of the support cantilever along the circumferential direction of the second bearing, and the penetration direction of the second heat dissipation holes is perpendicular to the upper surface of the base; A second heat dissipation blade is provided on a portion of the graphite shaft between the driven sprocket and the supporting cantilever.

[0007] Furthermore, the third heat exchange structure further includes: A second wind hood cylinder, wherein the second wind hood coincides with the axial center of the graphite shaft and covers the second heat dissipation blades therein; a gap is provided between the upper end of the second wind hood cylinder and the lower surface of the driven sprocket; the lower end of the second wind hood cylinder is connected to the supporting cantilever, and the diameter of the lower end thereof is larger than the diameter of a circle formed by a plurality of the second heat dissipation air holes.

[0008] Furthermore, the third heat exchange structure further includes: A guide wind tube, the guide wind tube coincides with the axial center of the graphite shaft and is located below the second wind cover tube; the upper end diameter of the guide wind tube is smaller than the diameter of the circle formed by the plurality of second heat dissipation holes, and is connected to the supporting cantilever; the lower end of the guide wind tube is gradually bent into a horizontal ring shape parallel to the upper surface of the base, and the lower end edge diameter is larger than the diameter of the circle formed by the plurality of second heat dissipation holes.

[0009] Furthermore, it also includes: A second heat exchange structure, the second heat exchange structure is arranged near one end of the support cantilever connected to the movable block to reduce the temperature of the connection between the rotating shaft and the first bearing; and / or, A first heat exchange structure is provided between the two support plates to reduce the temperature of the connection between the movable block and the lead screw.

[0010] Furthermore, the second heat exchange structure comprises: First heat dissipation holes, the first heat dissipation holes are evenly opened along the circumferential direction of the first bearing on one end of the support cantilever connected to the movable block, and the penetration direction of the first heat dissipation holes is perpendicular to the upper surface of the base; A first heat dissipation blade is disposed on the rotating shaft portion between the driving sprocket and the supporting cantilever.

[0011] Furthermore, the second heat exchange structure further includes: A first wind cover tube, wherein the first wind cover coincides with the axial center of the rotating shaft and covers the first heat dissipation blade therein; a gap is provided between the upper end of the first wind cover tube and the lower surface of the driving sprocket; the lower end of the first wind cover tube is connected to the supporting cantilever, and the diameter of the lower end thereof is larger than the diameter of a circle formed by a plurality of the first heat dissipation holes.

[0012] Furthermore, the first heat exchange structure comprises: A plurality of U-shaped fins, wherein the U-shaped fins are laid in parallel along the height direction of the support plate in the area between the two support plates and form a U-shaped groove structure; at least the lead screw and the movable block part movably connected to the lead screw are located in the groove area of ​​the U-shaped groove structure; An air pipe, the inlet and outlet ends of the air pipe are passed through the support plate, and the remaining part intersects with all the U-shaped fins to form a single straight air path, a U-shaped return air path or a continuous S-shaped return air path; the inlet end of the air pipe is connected to a gas storage tank storing inert gas; the outlet end of the air pipe is connected to the gas bin.

[0013] Furthermore, the graphite rotor is in a round cake shape, and the thickness of its lower surface gradually decreases from the center to the edge.

[0014] Furthermore, a plurality of U-shaped through grooves are evenly provided on the edge of the graphite rotor, and an angle α between a center direction of a groove depth of the U-shaped through groove and a radial direction of the graphite rotor is 0.5-1°, and the graphite rotor is offset in the opposite direction of rotation of the graphite rotor; the edge portions of the graphite rotor of two adjacent U-shaped through grooves constitute fan-shaped rotor teeth; along the opposite direction of rotation of the graphite rotor, from the groove edge of the U-shaped through groove to the groove edge of another U-shaped through groove, the thickness of the rotor teeth gradually decreases, and the thickness difference between the two sides of the fan-shaped tooth is 0.1-1 mm.

[0015] The beneficial effects of the present invention are: The rotation of the graphite shaft in the present invention is achieved by the cooperation of the driving sprocket, the driven sprocket and the transmission chain. Compared with the traditional gear transmission structure, the probability of jamming at high temperature is reduced, and the chain motor is far away from the high temperature area where the free end of the supporting cantilever is located, which is conducive to extending the service life and ensuring normal working state. At the same time, the third heat exchange structure provided in the present invention can regulate the temperature of the connection between the graphite shaft and the second bearing to prevent jamming due to excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a front view of the degassing, impurity removal and purification device for the recycled aluminum alloy melt in the embodiment.

[0018] Figure 2 for Figure 1 AA section view.

[0019] Figure 3 The three-dimensional structure of the degassing and impurity removal purification device for the recycled aluminum alloy melt in the embodiment is shown in FIG. Figure 1 .

[0020] Figure 4 Schematic diagram of the three-dimensional structure of the degassing and impurity removal purification device for recycled aluminum alloy melt Figure 2 .

[0021] Figure 5 The three-dimensional structure of the degassing and impurity removal purification device for the recycled aluminum alloy melt in the embodiment is shown in FIG. Figure 3 .

[0022] Figure 6 It is a front view of the graphite rotor in the embodiment.

[0023] Figure 7 1 is a top view of the graphite rotor in the embodiment.

[0024] Figure 8 Schematic diagram of the three-dimensional structure of the graphite rotor.

[0025] The accompanying drawings are marked as follows: 100-base, 110-moving roller, 120-counterweight, 130-support plate, 140-top plate, 150-screw motor, 151-screw, 160-guide column.

[0026] 200 - movable block, 210 - first mounting hole, 220 - guide hole.

[0027] 300 - first heat exchange structure, 310 - U-shaped fin, 320 - air pipe.

[0028] 400-support cantilever, 410-first bearing, 420-chain motor, 421-rotating shaft, 422-driving sprocket, 430-second bearing, 440-air chamber, 441-air inlet, 450-graphite shaft, 451-air duct, 460-follower wheel sprocket, 470-transmission chain, 480-graphite rotor, 481-third mounting hole, 482-U-shaped through groove, 483-rotor teeth.

[0029] 500 - second heat exchange structure, 510 - first heat dissipation hole, 520 - first heat dissipation blade, 530 - first wind hood tube.

[0030] 600 - a third heat exchange structure, 610 - a second heat dissipation hole, 620 - a second heat dissipation blade, 630 - a second wind hood tube, 640 - a guide wind tube. DETAILED DESCRIPTION

[0031] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention.

[0033] The embodiments of the invention are described in detail below with reference to the accompanying drawings.

[0034] Figure 1 It is a front view of the degassing, impurity removal and purification device for the recycled aluminum alloy melt in the embodiment. Figure 2 for Figure 1 AA section view. Figure 3 The three-dimensional structure of the degassing and impurity removal purification device for the recycled aluminum alloy melt in the embodiment is shown in FIG. Figure 1 . Figure 4 Schematic diagram of the three-dimensional structure of the degassing and impurity removal purification device for recycled aluminum alloy melt Figure 2 . Figure 5 The three-dimensional structure of the degassing and impurity removal purification device for the recycled aluminum alloy melt in the embodiment is shown in FIG. Figure 3 .like Figures 1 to 5 As shown in , the degassing and impurity removal purification device for the recycled aluminum alloy melt includes a base 100. Four movable rollers 110 are arranged on the lower surface of the base 100 to meet the need for the overall movement of the device. Counterweights 120 are respectively arranged on the opposite sides of the upper surface of the base 100 to provide a good fixing foundation for the overall device. Two parallel support plates 130 are also arranged in the area between the two configurations 120 on the upper surface of the base 100, and the two support plates 130 are roughly perpendicular to the upper surface of the base 100. A top plate 140 is arranged on the top of the two support plates 130, and the length of the top plate 140 is greater than the length of the support plates 130, that is, the top plate 140 extends outward along the length direction of the top of the two support plates 130, and a similar inverted "L"-shaped structure is formed between the two support plates 130 and the top plate 140. A lead screw motor 150 is disposed above the top plate 140 portion corresponding to the two support plates 130; a lead screw 151 connected to the power output end of the lead screw motor 150 passes through the top plate 140, and its lower end is vertically movably connected to the upper surface of the base 100. A guide column 160 is also vertically disposed between the top plate 140 and the base 100, and the guide column 160 is substantially parallel to the lead screw 151.

[0035] The degassing and impurity removal purification device for the recycled aluminum alloy melt also includes a movable block 200. Figure 2As shown in , the length of the movable block 200 is greater than the distance between the lead screw 151 and the guide post 160; the thickness of the movable block 200 is less than the distance between the two support plates 130. Along the height direction of the movable block 200, a first mounting hole 210 that matches the lead screw 151 and a guide hole 220 that matches the guide post 160 are provided. When the lead screw motor 150 drives the lead screw 151 to rotate forward or reverse, the matching relationship between the movable block 200, the lead screw 151 and the guide post 160 enables the movable block 200 to move upward or downward to a specified position.

[0036] like Figure 3~Figure 5 As shown in , in this embodiment, in order to reduce the influence of high temperature environment on the transmission cooperation between the movable block 200 and the lead screw 151, a plurality of U-shaped fins 310 are laid in parallel along the height direction of the support plates 130 in the area between the two support plates 130, and the U-shaped fins 310 can be made of metal materials with high thermal conductivity such as copper and aluminum. The plurality of U-shaped fins 310 form a U-shaped groove structure, at least the lead screw 151 and the movable block 200 part movably connected to the lead screw 151 are located in the groove area of ​​the U-shaped groove structure, and the movable block 200 does not touch the U-shaped fins 310. An air pipe 320 is also arranged between the two support plates 130, which can be made of metal materials with high thermal conductivity such as copper and aluminum. The inlet and outlet ends of the air pipe 320 are arranged on the same support plate 130 or respectively on two support plates 130; the rest of the air pipe 320 intersects with all the U-shaped fins 310 to form a single straight air path, a U-shaped return air path or a continuous S-shaped return air path. At the same time, the air pipe 320 also provides support for the fixation of the U-shaped fins 310. In this embodiment, the air pipe 320 and the U-shaped fin 310 arranged between the two support plates 130 together constitute the first heat exchange structure 300; the inlet end of the air pipe 320 is connected to a gas tank (not shown in the figure) storing an inert gas (such as nitrogen, argon, etc.), and when the inert gas with a lower temperature released in the gas tank flows along the air pipe 320, the U-shaped fin 310 is used for heat exchange, so that the temperature of the inner area of ​​the U-shaped groove structure formed by the U-shaped fin 310 is relatively low, thereby improving the reliability of the transmission cooperation between the movable block 200 and the lead screw 151, preventing it from getting stuck due to excessive temperature, and extending its service life.

[0037] like Figure 3~Figure 5As shown in , the degassing and impurity removal purification device for the recycled aluminum alloy melt also includes a support cantilever 400. One end of the support cantilever 400 is connected to one side of the movable block 200 adjacent to the guide hole 220, and a through second mounting hole is opened near the end of the support cantilever 400 in a direction substantially perpendicular to the upper surface of the base 100; a first bearing 410 is arranged in the second mounting hole. A chain motor 420 is arranged above the end of the support cantilever 400 connected to the movable block 200, and the lower end of the rotating shaft 421 connected to the power output end of the chain motor 420 is inserted into the first bearing 410, and a driving sprocket 422 is also arranged on the rotating shaft 421. A third through mounting hole is provided near the free end of the supporting cantilever 400 in a direction substantially perpendicular to the upper surface of the base 100, and a second bearing 430 is provided in the third mounting hole; a gas chamber 440 is also provided above the free end of the supporting cantilever 400, and an air inlet 441 of the gas chamber 440 is connected to the outlet end of the air pipe 320 through a metal hose, or directly connected to a gas storage tank (not shown in the figure) storing inert gas (such as nitrogen, argon, etc.). The degassing and impurity removal purification device for the recycled aluminum alloy melt also includes a graphite shaft 450. A through gas passage 451 is provided on the graphite shaft 450 along the axial center direction of the graphite shaft 450. The upper part of the graphite shaft 450 is inserted into the second bearing 430, and the top thereof is inserted into the gas chamber 440; the joint of the graphite shaft 450 and the gas chamber 440 is in sliding contact and sealing, so that the inert gas can flow along the gas passage 451 and be released from the lower end of the graphite shaft 450. A driven sprocket 460 is arranged on the graphite shaft 450 between the gas chamber 440 and the free end of the supporting cantilever 400, and a matching transmission chain 470 is sleeved between the driven sprocket 460 and the driving sprocket 422. A matching graphite rotor 480 is arranged at the lower end of the graphite shaft 450. When the chain motor 420 is working, the rotating shaft 421 and the driving sprocket 422 are driven to rotate rapidly, and then the driven sprocket 460, the graphite shaft 450 and the graphite rotor 480 are driven by the transmission chain 470 to rotate rapidly, and the inert gas introduced into the aluminum alloy melt through the air channel 451 is broken into uniform small bubbles; during the rising process of the small bubbles, the gas and inclusions in the aluminum alloy melt are brought to the surface to form aluminum slag, so as to achieve impurity removal and degassing. At the same time, in this embodiment, the rotation of the graphite shaft is achieved by the cooperation of the driving sprocket, the driven sprocket and the transmission chain. Compared with the traditional gear transmission structure, the probability of jamming at high temperature is reduced, and the chain motor is away from the high temperature area where the free end of the supporting cantilever is located, which is conducive to extending the service life and ensuring normal working condition.

[0038] like Figure 2 and Figure 5As shown in , a plurality of through first heat dissipation holes 510 are evenly opened on one end of the support cantilever 400 connected to the movable block 200 along the circumferential direction of the first bearing 410, and the through direction of the first heat dissipation holes 510 is perpendicular to the upper surface of the base 100; a first heat dissipation blade 520 is arranged on the rotating shaft 421 between the driving sprocket 422 and the support cantilever 400. When the rotating shaft 421 rotates rapidly, the first heat dissipation blade 520 also rotates synchronously, thereby driving the air flow around the first bearing 410; when the air flow passes through the first heat dissipation holes 510, it also takes away part of the heat at the connection between the support cantilever 400 and the first bearing 410, reducing the temperature there, and preventing the rotating shaft 421 and the first bearing 410 from being overheated and stuck. A first wind cover cylinder 530 is also provided on the outer periphery of the rotating shaft 421; the first wind cover cylinder 530 covers the first heat dissipation blade 520 therein, and the axial centers of the rotating shaft 421 and the first wind cover cylinder 530 coincide with each other; the lower end of the first wind cover cylinder 530 is connected to the supporting cantilever 400, and the diameter of the lower end thereof is larger than the diameter of the circle formed by the plurality of first heat dissipation air holes 510; there is a gap between the upper end of the first wind cover cylinder 530 and the lower surface of the driving sprocket 422; the middle part of the first wind cover cylinder 530 is evenly grooved compared with the upper and lower ends thereof, thereby forming an upper and lower groove. There are two conical air guide areas, and the first heat dissipation blade 520 is located in the air guide area below the first wind hood tube 530. By setting the first heat dissipation blade 520, the external air can be forced to be introduced from the air guide area above the first wind hood tube 530 into the air guide area below, and then flow out from the first heat dissipation air hole 510 to take away the heat; at the same time, because the air is continuously drawn into the air guide area below the first wind hood tube 530, the air pressure is slightly higher than the air pressure of the air guide area above the first wind hood tube 530, so that the air flow can be accelerated to pass through the first heat dissipation air hole 510 to take away the heat. In this embodiment, the first heat dissipation air hole 510, the first heat dissipation blade 520 and the first wind hood tube 530 constitute the second heat exchange structure 500, which can regulate the temperature of the connection between the rotating shaft and the first bearing to prevent the temperature from being too high and getting stuck; at the same time, the first wind hood tube can also isolate the position of the first heat dissipation blade.

[0039] like Figure 2 and Figure 5As shown in , a plurality of through second heat dissipation holes 610 are evenly opened on the free end of the support cantilever 400 along the circumferential direction of the second bearing 430, and the through direction of the second heat dissipation holes 610 is perpendicular to the upper surface of the base 100; a second heat dissipation blade 620 is arranged on the portion of the graphite shaft 450 between the driven sprocket 460 and the support cantilever 400. When the graphite shaft 450 rotates rapidly, the second heat dissipation blade 620 also rotates synchronously, thereby driving the air flow around the graphite shaft 450; when the air flow passes through the second heat dissipation holes 610, it also takes away part of the heat at the connection between the support cantilever 400 and the second bearing 430, thereby reducing the temperature there, and preventing the graphite shaft 450 and the second bearing 430 from being overheated and stuck. A second wind shield cylinder 630 is also provided on the periphery of the graphite shaft 450; the second wind shield cylinder 630 shields the second heat dissipation blade 620 therein, and the axial centers of the graphite shaft 450 and the second wind shield cylinder 630 coincide with each other; the lower end of the second wind shield cylinder 630 is connected to the support cantilever 400, and the diameter of the lower end is larger than the diameter of the circle formed by the plurality of second heat dissipation holes 610; there is a gap between the upper end of the second wind shield cylinder 630 and the lower surface of the driven sprocket 460; the middle part of the second wind shield cylinder 630 is evenly grooved compared with the upper and lower ends thereof, thereby forming an upper and lower groove. A conical wind guide area is formed, and the second heat dissipation blade 620 is located in the wind guide area below the second wind cover tube 630. By arranging the second heat dissipation blade 620, external air can be forced to be introduced from the wind guide area above the second wind cover tube 630 into the wind guide area below, and then flow out from the second heat dissipation air hole 610 to take away the heat; at the same time, since the wind guide area below the second wind cover tube 630 continuously draws in air, the air pressure is slightly higher than the air pressure in the wind guide area above the second wind cover tube 630, thereby accelerating the airflow to pass through the second heat dissipation air hole 610 and take away the heat. There is also a guide air cylinder 640 on the outer periphery of the graphite shaft 450, and the guide air cylinder 640 coincides with the axial center of the graphite shaft 450; the guide air cylinder 640 is located below the second wind cover cylinder 630, and its upper end diameter is smaller than the diameter of the circle formed by the multiple second heat dissipation holes 610 and is connected to the support cantilever 400; the lower end of the guide air cylinder 640 is gradually bent into a horizontal ring parallel to the upper surface of the base 100, and its lower end edge diameter is larger than the diameter of the circle formed by the multiple second heat dissipation holes 610, thereby changing the gas flow direction from the second heat dissipation holes 610 to prevent it from blowing directly to the aluminum alloy melt furnace. In this embodiment, the second heat dissipation holes 610, the second heat dissipation blades 620, the second wind hood tube 630 and the guide wind tube 640 constitute a third heat exchange structure 600, which can regulate the temperature of the connection between the graphite shaft and the second bearing to prevent it from being stuck due to excessive temperature; at the same time, the second wind hood tube can also isolate the position of the second heat dissipation blades; the guide wind tube can reduce the impact of airflow on the aluminum alloy melt furnace.

[0040] Figure 6 It is a front view of the graphite rotor in the embodiment. Figure 71 is a top view of the graphite rotor in the embodiment. Figure 8 Figure 3 is a schematic diagram of the three-dimensional structure of a graphite rotor. Figures 6-8 As shown in the figure, the graphite rotor 480 is roughly in the shape of a round cake; a third mounting hole 481 that cooperates with the lower end of the graphite shaft 450 is provided at the center of the graphite rotor 480; a plurality of U-shaped through grooves 482 are evenly provided on the edge of the graphite rotor 480, and the angle α between the center direction of the groove depth of the U-shaped through groove 482 and the radial direction of the graphite rotor 480 is 0.5~1°, and is offset in the opposite direction of the rotation of the graphite rotor 480; at the same time, the edge portions of the graphite rotor 480 of two adjacent U-shaped through grooves 482 form fan-shaped rotor teeth 483. The thickness of the lower surface of the graphite rotor 480 gradually decreases from the center to the edge, guiding the inert gas released from the lower end of the graphite shaft 450 to rotate in the U-shaped groove 482 at the edge of the graphite rotor 480, and then breaking into small bubbles; at the same time, along the opposite direction of the rotation of the graphite rotor 480, the thickness of the rotor teeth 483 gradually decreases from the groove edge of the U-shaped groove 482 to the groove edge of the other U-shaped groove 482, and the thickness difference between the two sides of the fan-shaped is 0.1~1mm, that is, the groove edges on both sides of the lower end of the U-shaped groove 482 have a certain position height difference, which is conducive to the inert gas entering the U-shaped groove 482 and being cut into smaller bubbles during high rotation. In this embodiment, by designing the shape of the lower surface of the graphite rotor, the inert gas is melted into the aluminum alloy melt to form bubbles with smaller diameters, which is conducive to further improving the degassing and impurity removal effect.

Claims

1. A degassing and impurity removal purification device for recycled aluminum alloy melt, characterized in that: include: A base, wherein the upper surface of the base is vertically provided with two parallel support plates; a top plate is provided on the top of the two support plates; A guide column is vertically arranged between the top plate and the upper surface of the base; A lead screw motor, wherein the lead screw motor is arranged above the top plate, and a lead screw connected to a power output end thereof passes through the top plate and is vertically movably connected to the upper surface of the base; A movable block, the movable block is slidably arranged on the lead screw and the guide column; A supporting cantilever, one end of which is connected to the movable block and is provided with a first bearing; a second bearing is provided near the free end of the supporting cantilever; and a gas chamber for introducing an inert gas is also provided above the free end of the supporting cantilever; A chain motor, wherein the chain motor is arranged above one end of the supporting cantilever connected to the movable block, and the lower end of the rotating shaft connected to the power output end of the chain motor is inserted into the first bearing; a driving sprocket is arranged on the rotating shaft; A graphite shaft, wherein the graphite shaft is provided with a through air passage along its own axial center direction; the upper portion of the graphite shaft is inserted into the second bearing, and the top portion thereof is inserted into the air chamber to form a sliding contact seal; a driven wheel sprocket is also provided near the top of the graphite shaft; a matching transmission chain is sleeved between the driven wheel sprocket and the driving sprocket; a graphite rotor is provided at the lower end of the graphite shaft; A third heat exchange structure is arranged near the free end of the support cantilever to reduce the temperature of the connection between the graphite shaft and the second bearing.

2. The degassing and impurity removal purification device for recycled aluminum alloy melt according to claim 1 is characterized in that: The third heat exchange structure comprises: Second heat dissipation holes, which are evenly opened on the free end of the support cantilever along the circumferential direction of the second bearing, and the penetration direction of the second heat dissipation holes is perpendicular to the upper surface of the base; A second heat dissipation blade is provided on a portion of the graphite shaft between the driven sprocket and the supporting cantilever.

3. The degassing and impurity removal purification device for recycled aluminum alloy melt according to claim 2 is characterized in that: The third heat exchange structure further includes: A second wind hood cylinder, wherein the second wind hood coincides with the axial center of the graphite shaft and covers the second heat dissipation blades therein; a gap is provided between the upper end of the second wind hood cylinder and the lower surface of the driven sprocket; the lower end of the second wind hood cylinder is connected to the supporting cantilever, and the diameter of the lower end thereof is larger than the diameter of a circle formed by a plurality of the second heat dissipation air holes.

4. The degassing and impurity removal purification device for recycled aluminum alloy melt according to claim 3 is characterized in that: The third heat exchange structure further includes: A guide wind tube, the guide wind tube coincides with the axial center of the graphite shaft and is located below the second wind cover tube; the upper end diameter of the guide wind tube is smaller than the diameter of the circle formed by the plurality of second heat dissipation holes, and is connected to the supporting cantilever; the lower end of the guide wind tube is gradually bent into a horizontal ring shape parallel to the upper surface of the base, and the lower end edge diameter is larger than the diameter of the circle formed by the plurality of second heat dissipation holes.

5. The degassing and impurity removal purification device for recycled aluminum alloy melt according to any one of claims 1 to 4, characterized in that: Also includes: A second heat exchange structure, the second heat exchange structure is arranged near one end of the support cantilever connected to the movable block to reduce the temperature of the connection between the rotating shaft and the first bearing; and / or, A first heat exchange structure is provided between the two support plates to reduce the temperature of the connection between the movable block and the lead screw.

6. The degassing, impurity removal and purification device for recycled aluminum alloy melt according to claim 5, characterized in that: The second heat exchange structure comprises: First heat dissipation holes, the first heat dissipation holes are evenly opened along the circumferential direction of the first bearing on one end of the support cantilever connected to the movable block, and the penetration direction of the first heat dissipation holes is perpendicular to the upper surface of the base; A first heat dissipation blade is disposed on the rotating shaft portion between the driving sprocket and the supporting cantilever.

7. The degassing, impurity removal and purification device for recycled aluminum alloy melt according to claim 6 is characterized in that: The second heat exchange structure also includes: A first wind cover tube, wherein the first wind cover coincides with the axial center of the rotating shaft and covers the first heat dissipation blade therein; a gap is provided between the upper end of the first wind cover tube and the lower surface of the driving sprocket; the lower end of the first wind cover tube is connected to the supporting cantilever, and the diameter of the lower end thereof is larger than the diameter of a circle formed by a plurality of the first heat dissipation holes.

8. The degassing, impurity removal and purification device for recycled aluminum alloy melt according to claim 5, characterized in that: The first heat exchange structure comprises: A plurality of U-shaped fins, wherein the U-shaped fins are laid in parallel along the height direction of the support plate in the area between the two support plates and form a U-shaped groove structure; at least the lead screw and the movable block part movably connected to the lead screw are located in the groove area of ​​the U-shaped groove structure; An air pipe, the inlet and outlet ends of the air pipe are passed through the support plate, and the remaining part intersects with all the U-shaped fins to form a single straight air path, a U-shaped return air path or a continuous S-shaped return air path; the inlet end of the air pipe is connected to a gas storage tank storing inert gas; the outlet end of the air pipe is connected to the gas bin.

9. The degassing and impurity removal purification device for recycled aluminum alloy melt according to any one of claims 1 to 4 and 6 to 8, characterized in that: The graphite rotor is in a round cake shape, and the thickness of the lower surface thereof gradually decreases from the center to the edge.

10. The degassing, impurity removal and purification device for recycled aluminum alloy melt according to claim 9, characterized in that: A plurality of U-shaped through grooves are evenly provided on the edge of the graphite rotor, and the angle α between the center direction of the groove depth of the U-shaped through groove and the radial direction of the graphite rotor is 0.5-1°, and the graphite rotor is offset in the opposite direction of rotation of the graphite rotor; the edge portions of the graphite rotor of two adjacent U-shaped through grooves form fan-shaped rotor teeth; along the opposite direction of rotation of the graphite rotor, from the groove edge of the U-shaped through groove to the groove edge of the other U-shaped through groove, the thickness of the rotor teeth gradually decreases, and the thickness difference between the two sides of the fan is 0.1-1 mm.

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