Refining pipe for isolating molten aluminum and degassing

Abstract

The invention relates to the field of molten aluminum alloy refining equipment, in particular to a refining pipe for isolating molten aluminum and degassing. The device comprises a moving trolley, a mounting box is arranged on one side of the surface of the moving trolley, a vertical frame is arranged on the surface of the mounting box, a rotating motor is arranged at the top of the vertical frame, a lead screw is arranged on an output shaft of the rotating motor, a base plate is arranged on the surface of the lead screw, and the lead screw drives the base plate to move in the vertical direction when rotating; the output end of a servo motor is controlled to drive a first belt shaft to rotate, a transmission belt arranged on the surface of the first belt shaft drives a second belt shaft to conduct transmission, a stirring rod arranged at the bottom of the second belt shaft rotates coaxially with the second belt shaft, and due to the fact that an impeller is arranged at the bottom of the stirring rod, negative pressure is generated in a drainage cover in the rotating process of the impeller; molten aluminum in the smelting furnace is sucked into the drainage cover, bubbles generated by inert gas take away hydrogen in the molten aluminum sucked into the drainage cover, and therefore the labor intensity of operators is reduced.

Description

Technical Field

[0001] The present invention relates to the field of aluminum alloy liquid refining equipment, and specifically, to a refining pipe for isolating aluminum liquid for degassing. Background Art

[0002] The raw materials of aluminum (such as bauxite, waste aluminum) may adsorb moisture or contain volatile substances. When melted, the moisture decomposes to produce hydrogen. The solubility of hydrogen in solid aluminum is much lower than that in liquid aluminum. When the aluminum liquid solidifies, the supersaturated hydrogen will precipitate and aggregate to form pores, which affects the quality of castings. Therefore, it is necessary to degas the aluminum liquid.

[0003] Regarding the refining pipe for degassing, there are many existing technologies, for example:

[0004] Chinese Patent Publication No. CN216972640U discloses a degassing and refining pipe for aluminum alloy liquid, which relates to the field of aluminum alloy liquid refining equipment. It includes an intake main pipe, and a three-way joint is connected to the upper end of the intake main pipe. Two interfaces of the three-way joint are respectively connected with an elbow connector and a refining gas pipe. The other end of the elbow connector is connected with a protective gas pipe. A first ball valve is installed at the front end of the protective gas pipe, and a protective gas inlet pipe is installed in front of the first ball valve. A second ball valve is installed at the front end of the refining gas pipe, and a refining gas inlet pipe is installed in front of the second ball valve. The lower end of the intake main pipe is connected with a shunt cylinder, and a number of refining gas outlet heads with different lengths are evenly arranged on the circumferential surface of the shunt cylinder. This patent adopts the shunt cylinder design, which effectively increases the contact area and contact time between the aluminum alloy liquid and the refining gas, can effectively reduce the residence time of the aluminum alloy liquid, and then improve the refining efficiency of the aluminum alloy liquid and reduce costs.

[0005] However, in the actual use process, there are still some problems:

[0006] 1. The aluminum liquid bath usually has a large volume. During the current degassing process, if the gas guide pipe is fixed, the action range of the bubbles is limited to a local area directly above the nozzle. The aluminum liquid far from the nozzle may not be able to fully contact the gas. Therefore, it is necessary for the operator to move the gas guide pipe inside the aluminum liquid bath, which has potential safety hazards and high labor intensity;

[0007] 2. Under the traditional bottom direct injection gas supply method, inert gases (argon, nitrogen) quickly float up in the form of large bubbles, resulting in low utilization efficiency of inert gases and increased production costs.

[0008] In view of this, we propose a refining pipe for isolating aluminum liquid for degassing. Summary of the Invention

[0009] The purpose of the present invention is to provide a refining pipe for isolating aluminum liquid for degassing to solve the problems raised in the above background art.

[0010] To achieve the above object, the present invention aims to provide a refining pipe for isolating degassing of molten aluminum, including a mobile trolley, on the surface of which there is a control box and a gas tank. On one side of the surface of the mobile trolley, there is an installation box, on the surface of which there is a vertical frame. At the top of the vertical frame, there is a rotating motor, and the output shaft of the rotating motor is provided with a lead screw. On the surface of the lead screw, there is a substrate. When the lead screw rotates, it drives the substrate to move in the vertical direction. At the end of the substrate, there is a stirring component, which includes a servo motor. The output end of the servo motor penetrates the substrate and at the end there is a first belt shaft. On the side far from the first belt shaft, there is a second belt shaft. Between the first belt shaft and the second belt shaft, there is a transmission belt. At the bottom of the second belt shaft, there is a stirring rod, at the bottom of the stirring rod, there is an impeller. On the surface of the stirring rod, there is a rotating bearing, and on the outer wall of the rotating bearing, there is a drainage cover clamped. The drainage cover is a hollow shape with an open bottom. Drainage holes are opened on the surface of the drainage cover, and inside the drainage cover, there is a degassing component, which is used to blow inert gas into the molten aluminum. At the bottom of the vertical frame, there is an angle adjustment component.

[0011] As a further improvement of this technical solution, the drainage cover is composed of a sealing part and an exchange part. The drainage holes provided on the surface of the drainage cover are arranged in an array on the surface of the exchange part. When the stirring rod rotates, it drives the impeller to form a negative pressure inside the drainage cover.

[0012] As a further improvement of this technical solution, the top of the drainage cover is sealed, and when the molten aluminum enters the inside of the drainage cover, it is thrown out from the exchange part.

[0013] As a further improvement of this technical solution, above each drainage hole, there is a guiding plate, which is fixed in a ring shape above the drainage hole. The guiding plate is arranged at an angle of 30° with the side wall of the drainage cover, and the guiding plate is used to change the direction of the molten aluminum flowing out from the drainage hole.

[0014] As a further improvement of this technical solution, the degassing component includes intake pipes provided on both sides of the end of the substrate. Between the intake pipes and the gas tank, there is a gas valve to control the air flow size. The intake pipes penetrate the drainage cover to its exchange part. At the bottom of the intake pipes, there is a three-way joint, and at the end of the three-way joint, there are branch pipes. The branch pipes are arranged in an array, and the openings of the branch pipes face upward.

[0015] As a further improvement of this technical solution, at the top of the branch pipes, there is a honeycomb head, which is used to split a single inert gas flow into small bubbles.

[0016] As a further improvement of this technical solution, the angle adjustment component includes a semi-gear provided at the bottom of the angle adjustment component, and the semi-gear rotates inside the installation box.

[0017] As a further improvement of the technical solution, a double-headed gear rod is provided on one side of the half gear. A rotating gear is vertically provided on one side below the double-headed gear rod. A turntable rod is provided at the end of the rotating gear, and the turntable rod penetrates through the installation box to the outside.

[0018] As a further improvement of the technical solution, the mobile trolley is provided with a servo system, and the movement of the trolley is controlled by the servo system.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. In the refining pipe for isolating and degassing molten aluminum, by controlling the output end of the servo motor to drive the first belt shaft to rotate, the transmission belt provided on the surface of the first belt shaft drives the second belt shaft to transmit power. The stirring rod provided at the bottom of the second belt shaft rotates coaxially with it. Since an impeller is provided at the bottom of the stirring rod, negative pressure is generated inside the diversion hood during the rotation of the impeller, sucking the molten aluminum in the melting furnace into the diversion hood. Combining with the bubbles generated by the branch pipe, without moving the intake pipe, the bubbles generated by the inert gas carry away the hydrogen in the molten aluminum sucked into the diversion hood, thus reducing the labor intensity of the operators.

[0021] 2. In the refining pipe for isolating and degassing molten aluminum, when the molten aluminum mixed with bubbles is thrown out from the diversion hole, the bubbles collide with the inner wall of the guiding plate. At this time, the bubbles are impacted to form smaller bubbles. And since the guiding plate is arranged at an angle of 30° with the side wall of the diversion hood, the moving directions of the molten aluminum and the bubbles are vertically downward, thereby increasing the contact probability between the bubbles and the hydrogen in the molten aluminum, and reducing the rising speed of the bubbles, reducing the degassing cost.

[0022] 3. In the refining pipe for isolating and degassing molten aluminum, by controlling the air valve to adjust the appropriate pressure of the inert gas entering the stirring rod, the inert gas enters the honeycomb head through the branch pipe, and multiple small bubbles are generated through the honeycomb head. Since the opening direction of the honeycomb head is upward, the molten aluminum sucked into the diversion hood due to the negative pressure generated by the rotation of the impeller can be quickly mixed with the bubbles, enabling the bubbles to degas the molten aluminum, thus accelerating the degassing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a cross-sectional view of the overall structure of the present invention;

[0025] Figure 3 is of the present invention Figure 2 schematic diagram at position A;

[0026] Figure 4 is a schematic diagram of the structure of the negative pressure component of the present invention;

[0027] Figure 5Cross-sectional view of the drainage cover of the present invention;

[0028] Figure 6 Schematic structural diagram of the degassing component of the present invention;

[0029] Figure 7 Schematic structural diagram of the angle adjustment component of the present invention;

[0030] The meanings of each label in the figure are as follows:

[0031] 100, mobile trolley; 101, control box; 102, gas tank;

[0032] 200, vertical frame; 201, rotating motor; 202, lead screw; 203, base plate;

[0033] 300, negative pressure component; 301, servo motor; 302, first belt shaft; 303, second belt shaft; 304, transmission belt; 305, stirring rod; 306, rotating bearing; 307, drainage cover; 308, drainage hole; 309, guiding plate;

[0034] 400, degassing component; 401, intake pipe; 402, three-way head; 403, branch pipe; 404, honeycomb head;

[0035] 500, angle adjustment component; 501, semi-gear; 502, double-headed gear rod; 503, rotating gear; 504, turntable rod. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation of the present invention.

[0038] The purpose of this embodiment is to provide a refining pipe for degassing molten aluminum for isolation. Refer to Figures 1 - 7As shown in the figure, it includes a mobile trolley 100. A control box 101 and a gas tank 102 are provided on the surface of the mobile trolley 100. An installation box is provided on one side of the surface of the mobile trolley 100. A vertical frame 200 is provided on the surface of the installation box. A rotating motor 201 is provided at the top of the vertical frame 200. A lead screw 202 is provided on the output shaft of the rotating motor 201. A substrate 203 is provided on the surface of the lead screw 202. When the lead screw 202 rotates, it drives the substrate 203 to move in the vertical direction. A stirring assembly and negative pressure assembly 300 is provided at the end of the substrate 203. The stirring assembly and negative pressure assembly 300 includes a servo motor 301. The output end of the servo motor 301 penetrates through the substrate 203 and a first belt shaft 302 is provided at the end. A second belt shaft 303 is provided on the side away from the first belt shaft 302. A transmission belt 304 is provided between the first belt shaft 302 and the second belt shaft 303. A stirring rod 305 is provided at the bottom of the second belt shaft 303. An impeller is provided at the bottom of the stirring rod 305. A rotating bearing 306 is provided on the surface of the stirring rod 305. A drainage cover 307 is clamped on the outer wall of the rotating bearing 306. The drainage cover 307 is a hollow shape with an open bottom. Drainage holes 308 are provided on the surface of the drainage cover 307. A degassing assembly 400 is provided inside the drainage cover 307. The degassing assembly 400 is used to blow inert gas into the molten aluminum. An angle adjustment assembly 500 is provided at the bottom of the vertical frame 200.

[0039] The aluminum liquid bath usually has a relatively large volume. During the current degassing process, if the gas guide pipe is fixed, the effective range of the bubbles is limited to a local area directly above the nozzle. The aluminum liquid far from the nozzle may not be able to fully contact the gas. Therefore, it is necessary for the operator to move the gas guide pipe inside the aluminum liquid bath, which poses a safety hazard and requires a high labor intensity. Therefore, the stirring assembly negative pressure assembly 300 includes a servo motor 301. The output end of the servo motor 301 penetrates through the substrate 203 and a first belt shaft 302 is provided at the end. A second belt shaft 303 is provided on the side away from the first belt shaft 302. A transmission belt 304 is provided between the first belt shaft 302 and the second belt shaft 303. A stirring rod 305 is provided at the bottom of the second belt shaft 303. An impeller is provided at the bottom of the stirring rod 305. A rotating bearing 306 is provided on the surface of the stirring rod 305. A drainage cover 307 is clamped on the outer wall of the rotating bearing 306. The drainage cover 307 is a hollow shape with an open bottom. Drainage holes 308 are opened on the surface of the drainage cover 307. The drainage cover 307 is composed of a sealing part and an exchange part. The drainage holes 308 provided on the surface of the drainage cover 307 are arranged in an array on the surface of the exchange part. When the stirring rod 305 rotates, it drives the impeller to form a negative pressure inside the drainage cover 307. The inert gas in the gas tank 102 is controlled by a gas valve to flow into the intake pipe 401 and is ejected from the end of the branch pipe 403 through the three-way head 402. At this time, the inert gas exists inside the drainage cover 307. By controlling the output end of the servo motor 301 to drive the first belt shaft 302 to rotate, the transmission belt 304 provided on the surface of the first belt shaft 302 drives the second belt shaft 303 to transmit power. The stirring rod 305 provided at the bottom of the second belt shaft 303 rotates coaxially with it. Since an impeller is provided at the bottom of the stirring rod 305, the impeller generates a negative pressure inside the drainage cover 307 during rotation, sucking the aluminum liquid in the furnace into the drainage cover 307. In cooperation with the inert gas ejected from the honeycomb head 404, while the intake pipe 401 does not need to be moved, the inert gas takes away the hydrogen in the aluminum liquid sucked into the drainage cover 307, thereby reducing the labor intensity of the operator.

[0040] When the stirring rod 305 drives the impeller to rotate coaxially, a negative pressure is generated inside the drainage cover 307, causing the aluminum liquid in the furnace to continuously mix with the inert gas discharged from the honeycomb head 404. In order to increase the time for the inert gas to stay in the aluminum liquid and thus improve the degassing efficiency, the top of the drainage cover 307 is sealed. When the aluminum liquid enters the drainage cover 307, it is thrown out from the exchange part. Since the top of the drainage cover 307 is sealed, the inert gas generates bubbles and the aluminum liquid is thrown out from the drainage holes 308 under the action of centrifugal force. At this time, the bubbles and the aluminum liquid move horizontally under the action of force, thereby increasing the time for the bubbles in the aluminum liquid and extending the floating path of the bubbles, thus improving the degassing efficiency.

[0041] In order to enable the bubbles in the molten aluminum to circulate, thereby reducing the use of inert gas, guide plates 309 are provided above the drainage holes 308. The guide plates 309 are fixed in a ring shape above the drainage holes 308. The guide plates 309 are arranged at an angle of 30° with the side wall of the drainage cover 307. The guide plates 309 are used to change the direction of the molten aluminum flowing out of the drainage holes 308. When the molten aluminum mixed with bubbles is ejected from the drainage holes 308, the bubbles collide with the inner wall of the guide plates 309. At this time, the bubbles are impacted to form smaller bubbles. And because the guide plates 309 are arranged at an angle of 30° with the side wall of the drainage cover 307, the moving directions of the bubbles and the molten aluminum are vertically downward, thereby increasing the contact probability between the bubbles and the hydrogen in the molten aluminum, and reducing the rising speed of the bubbles, reducing the amount of inert gas used and the degassing cost.

[0042] Considering that during the degassing process of the molten aluminum, the inner part of the drainage cover 307 that forms a negative pressure blocks the air outlet of the branch pipe 403, resulting in the inability of the inert gas to eject and generate bubbles. Therefore, the degassing assembly 400 includes intake pipes 401 provided on both sides of the end of the substrate 203. A gas valve is connected between the intake pipes 401 and the gas tank 102 to control the air flow. The intake pipes 401 penetrate through the drainage cover 307 to its exchange part. A tee joint 402 is provided at the bottom of the intake pipes 401. Branch pipes 403 are provided at the ends of the tee joint 402. The branch pipes 403 are arranged in an array. The branch pipes 403 open upward. A honeycomb head 404 is provided at the top of the branch pipes 403. The honeycomb head 404 is used to split a single inert gas flow into small bubbles. The gas valve is controlled to adjust the appropriate pressure of the inert gas entering the stirring rod 305. The inert gas enters the honeycomb head 404 through the branch pipes 403, and multiple small bubbles are generated through the honeycomb head 404. Since the opening direction of the honeycomb head 404 is upward, the molten aluminum sucked into the inner part of the drainage cover 307 due to the negative pressure generated by the rotation of the impeller can be quickly mixed with the bubbles, enabling the bubbles to degas the molten aluminum, thereby accelerating the degassing operation.

[0043] When performing the degassing operation, in order to improve the degassing effect, the stirring component and the negative pressure component 300 need to be placed at the center of the aluminum liquid furnace, so that when the impeller rotates, the aluminum liquid in the furnace can be degassed in all directions. Therefore, the angle adjustment component 500 includes a half gear 501 provided at the bottom of the angle adjustment component 500. The half gear 501 rotates inside the installation box. One side of the half gear 501 is provided with a double-headed gear rod 502. One side below the double-headed gear rod 502 is vertically provided with a rotating gear 503. The end of the rotating gear 503 is provided with a turntable rod 504. The turntable rod 504 penetrates through the installation box to the outside. Control the moving trolley 100 to drive the vertical frame 200 to move. When the stirring component and the negative pressure component 300 provided at the end of the vertical frame 200 move above the furnace, control the output shaft of the rotating motor 201 to drive the lead screw 202 to rotate, so that the substrate 203 moves vertically on the surface of the lead screw 202, and the stirring component and the negative pressure component 300 move into the furnace. Drive the rotating gear 503 to rotate by rotating the turntable rod 504. The double-headed gear rod 502 provided above the rotating gear 503 meshes and rotates. During the rotation of the double-headed gear rod 502, the half gear 501 is driven to rotate, thereby adjusting the angle of the vertical frame 200, so that the stirring component and the negative pressure component 300 are located at the center of the aluminum liquid furnace, facilitating the degassing operation of the aluminum liquid in the furnace in all directions.

[0044] The moving trolley 100 is equipped with a servo system. The movement of the trolley is controlled through the servo system. The working principle of the servo system of the moving trolley 100 to control its movement is based on the closed-loop process of "instruction issuance - execution - feedback correction". First, the upper computer issues motion instructions such as position and speed. After receiving them, the servo driver drives the motor to operate by adjusting the voltage, current and frequency. The motor then converts the rotational motion into the linear movement or steering of the trolley through mechanical transmission mechanisms such as gear racks and ball screw nuts.

[0045] During the operation, feedback devices such as encoders continuously monitor the movement state of the trolley, and feed back data such as the actual displacement and speed to the servo driver. If there is a deviation between the actual state and the target instruction, the driver will automatically adjust the motor parameters for correction until the target state is reached.

[0046] When in specific use, control the moving trolley 100 to move to the aluminum liquid furnace. When the stirring component and the negative pressure component 300 provided at the end of the vertical frame 200 move above the furnace, control the output shaft of the rotating motor 201 to drive the lead screw 202 to rotate, so that the substrate 203 moves vertically on the surface of the lead screw 202, and the stirring component and the negative pressure component 300 move into the furnace. Drive the rotating gear 503 to rotate by rotating the turntable rod 504. The double-headed gear rod 502 provided above the rotating gear 503 meshes and rotates. During the rotation of the double-headed gear rod 502, the half gear 501 is driven to rotate, thereby adjusting the angle of the vertical frame 200, so that the stirring component and the negative pressure component 300 are located at the center of the aluminum liquid furnace;

[0047] When refining and degassing molten aluminum, the inert gas in the gas tank 102 is controlled by a gas valve to flow into the intake pipe 401 and is ejected from the end of the branch pipe 403 through the three-way head 402. At this time, the inert gas exists inside the diversion hood 307. By controlling the output end of the servo motor 301 to drive the first belt shaft 302 to rotate, the transmission belt 304 provided on the surface of the first belt shaft 302 drives the second belt shaft 303 for transmission. The stirring rod 305 provided at the bottom of the second belt shaft 303 rotates coaxially with it. Since an impeller is provided at the bottom of the stirring rod 305, a negative pressure is generated inside the diversion hood 307 during the rotation of the impeller, causing the molten aluminum in the furnace to enter the inside of the diversion hood 307. Cooperating with the inert gas ejected from the honeycomb head 404, it is not necessary for an operator to hold a spray pipe and insert it into the bottom of the molten pool and continuously move the spray pipe in the molten aluminum to make the bubbles and the molten aluminum evenly distributed for degassing operation, thereby reducing the labor intensity of the operator.

[0048] When the molten aluminum mixed with bubbles is thrown out from the drainage hole 308, the bubbles collide with the inner wall of the guide plate 309. At this time, the bubbles are impacted to form smaller bubbles. And because the guide plate 309 is arranged at an angle of 30° with the side wall of the diversion hood 307, the moving directions of the bubbles and the molten aluminum are vertically downward, thereby increasing the contact probability between the bubbles and the hydrogen in the molten aluminum, and reducing the rising speed of the bubbles, reducing the amount of inert gas used and lowering the degassing cost.

[0049] Control the gas valve to adjust the appropriate pressure of the inert gas entering the stirring rod 305. The inert gas enters the honeycomb head 404 through the branch pipe 403, and multiple small bubbles are generated through the honeycomb head 404. Since the opening direction of the honeycomb head 404 is upward, therefore, the molten aluminum sucked into the inside of the diversion hood 307 due to the negative pressure generated by the rotation of the impeller can be quickly mixed with the bubbles, enabling the bubbles to degas the molten aluminum, thereby accelerating the degassing operation.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A refining pipe for degassing molten aluminum for isolation, characterized in that: It includes a mobile trolley (100), on the surface of the mobile trolley (100) there is a control box (101) and a gas tank (102). On one side of the surface of the mobile trolley (100) there is an installation box, and on the surface of the installation box there is an upright frame (200). At the top of the upright frame (200) there is a rotating motor (201), the output shaft of the rotating motor (201) is provided with a lead screw (202), on the surface of the lead screw (202) there is a substrate (203). When the lead screw (202) rotates, it drives the substrate (203) to move in the vertical direction. At the end of the substrate (203) there is a negative pressure component (300), the negative pressure component (300) includes a servo motor (301), the output end of the servo motor (301) penetrates the substrate (203) and at the end there is a first belt shaft (302). On the side away from the first belt shaft (302) there is a second belt shaft (303). Between the first belt shaft (302) and the second belt shaft (303) there is a transmission belt (304). At the bottom of the second belt shaft (303) there is a stirring rod (305), at the bottom of the stirring rod (305) there is an impeller. On the surface of the stirring rod (305) there is a rotating bearing (306), and on the outer wall of the rotating bearing (306) there is a drainage cover (307) clamped. The drainage cover (307) is a hollow shape with an open bottom, on the surface of the drainage cover (307) there are drainage holes (308) opened, and inside the drainage cover (307) there is a degassing component (400). The degassing component (400) is used to blow inert gas into the molten aluminum. At the bottom of the upright frame (200) there is an angle adjustment component (500).

2. The refining tube for isolating and degassing molten aluminum according to claim 1, characterized in that: The drainage cover (307) is composed of a sealing part and an exchange part. The drainage holes (308) provided on the surface of the drainage cover (307) are arranged in an array on the surface of the exchange part. When the stirring rod (305) rotates, it drives the impeller to form a negative pressure inside the drainage cover (307).

3. The refining tube for isolating and degassing molten aluminum according to claim 2, wherein: The top of the drainage cover (307) is sealed. When the molten aluminum enters the inside of the drainage cover (307), it is thrown out from the exchange part.

4. The refining pipe for isolating and degassing molten aluminum according to claim 2, characterized in that: Above each of the drainage holes (308) there is a guiding plate (309). The guiding plate (309) is fixed in a ring shape above the drainage holes (308). The guiding plate (309) is arranged at an angle of 30° with the side wall of the drainage cover (307). The guiding plate (309) is used to change the direction of the molten aluminum flowing out from the drainage holes (308).

5. The refining tube for isolating and degassing molten aluminum according to claim 1, characterized in that: The degassing component (400) includes intake pipes (401) provided on both sides at the end of the substrate (203). Between the intake pipes (401) and the gas tank (102) there is a gas valve to control the air flow size. The intake pipes (401) penetrate the drainage cover (307) to its exchange part. At the bottom of the intake pipes (401) there is a tee joint (402). At the end of the tee joint (402) there are branch pipes (403). The branch pipes (403) are arranged in an array and the openings of the branch pipes (403) face upward.

6. The refining tube for isolating aluminum liquid degassing according to claim 5, characterized in that: At the top of the branch pipes (403) there are honeycomb heads (404). The honeycomb heads (404) are used to split a single inert gas flow into small bubbles.

7. The refining pipe for isolating and degassing molten aluminum according to claim 1, characterized in that: The angle adjustment component (500) includes a half gear (501) provided at the bottom of the angle adjustment component (500), and the half gear (501) rotates inside the installation box.

8. The refining tube for isolating and degassing molten aluminum according to claim 7, characterized in that: One side of the half gear (501) is provided with a double-headed gear rod (502). One side below the double-headed gear rod (502) is vertically provided with a rotating gear (503). The end of the rotating gear (503) is provided with a turntable rod (504), and the turntable rod (504) penetrates through the installation box to the outside.

9. The refining pipe for isolating and degassing molten aluminum according to claim 1, wherein: The mobile trolley (100) is provided with a servo system, and the movement of the trolley is controlled by the servo system.

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