Molten aluminum degassing device

Abstract

The utility model provides a kind of molten aluminum degassing device, including molten aluminum pool, air distribution pipe is arranged in the lower position in molten aluminum pool, air distribution pipe is installed with communicating pipe in one end outside molten aluminum pool, electric valve is provided with two, two electric valves are respectively installed in the two ends of communicating pipe, two pipe joints are respectively installed in the one end of electric valve away from communicating pipe, horizontal cylinder is installed on pipe joint and is communicated with pipe joint, the one end of horizontal cylinder away from pipe joint is installed with detachable cylinder cover, cylinder cover one side middle position is equipped with air hole, piston is slidably installed in the side of horizontal cylinder close to pipe joint, spring in compression state is equipped between piston and cylinder cover, the utility model has the beneficial effects that: without spending more time waiting for molten aluminum to discharge from the passage formed by air distribution pipe and U-shaped pipe, improve molten aluminum transfer efficiency.

Description

Technical Field

[0001] This utility model is an aluminum liquid degassing device, belonging to the field of aluminum liquid degassing and slag removal technology. Background Technology

[0002] Nitrogen or argon gas is blown into molten aluminum, breaking it into numerous dispersed bubbles that disperse within it. These bubbles are insoluble in the molten aluminum and, through gas partial pressure differences and surface adsorption, absorb hydrogen and oxide inclusions from the melt. These inclusions are carried to the melt surface as the bubbles rise, achieving purification. Because the bubbles are small and dispersed, they mix uniformly with the rotating melt and rise slowly in a spiral, resulting in a long contact time and no continuous upward airflow, effectively removing harmful hydrogen and some oxide inclusions. Argon: The bubbles have better wettability with molten aluminum, enabling more efficient entrainment of oxide inclusions (such as Al2O3), especially for fine inclusions, where its removal rate is higher than nitrogen. Nitrogen: The AlN film that may form on the bubble surface reduces the binding ability with inclusions, resulting in a slightly weaker inclusion removal effect. Furthermore, if the reaction is vigorous, new AlN inclusions may be generated.

[0003] Therefore, nitrogen and argon are alternately introduced into the molten aluminum to allow each gas to exert its own advantages. Two electric valves are installed at the end of the gas distribution pipe outside the molten aluminum pool, respectively connected to the nitrogen and argon supply lines. By controlling the two electric valves to open alternately, nitrogen and argon are alternately introduced into the molten aluminum. When one electric valve is closed and the other is open, there will be a brief switching time. During this time, the amount of gas entering the gas distribution pipe is reduced, and the molten aluminum in the pool can easily enter the gas distribution pipe through the vent. When the molten aluminum in the pool is transferred, some of the molten aluminum enters the gas distribution pipe and takes a long time to be discharged, which affects work efficiency. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an aluminum liquid degassing device to solve the problems mentioned in the background technology. This utility model does not require spending a lot of time waiting for the aluminum liquid to be discharged from the channel formed by the gas distribution pipe and the U-shaped pipe, thereby improving the aluminum liquid transfer efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an aluminum liquid degassing device, comprising:

[0006] Aluminum liquid pool;

[0007] A gas distribution pipe is installed in the lower part of the aluminum liquid pool. One end of the gas distribution pipe passes through the aluminum liquid pool and extends to the outside of the aluminum liquid pool. Multiple first gas outlet holes are evenly opened at the lower part of the outer surface of the gas distribution pipe. A connecting pipe is installed at the end of the gas distribution pipe on the outside of the aluminum liquid pool.

[0008] Two electric valves are provided, and the two electric valves are respectively installed at both ends of the connecting pipe;

[0009] Two pipe fittings are provided, and the two pipe fittings are respectively installed at the end of the electric valve away from the connecting pipe;

[0010] A horizontal cylinder is installed on and connected to a pipe joint. A detachable cylinder cover is installed at the end of the horizontal cylinder away from the pipe joint. A vent hole is opened in the middle of one side of the cylinder cover. A piston is slidably installed inside the horizontal cylinder near the pipe joint. A spring in a compressed state is provided between the piston and the cylinder cover. The spring is arranged inside the horizontal cylinder and along the length of the horizontal cylinder.

[0011] Furthermore, a U-shaped pipe is installed at one end of the gas distribution pipe inside the aluminum liquid pool. The U-shaped pipe is horizontally positioned inside the aluminum liquid pool, and multiple second gas outlet holes are evenly opened at the lower part of the outer surface of the U-shaped pipe.

[0012] Furthermore, a support plate is installed at the end of the cross cylinder near the pipe joint, and a connecting plate is installed at the end of the support plate away from the cross cylinder. The connecting plate is connected to the aluminum liquid pool by multiple screws.

[0013] Furthermore, a boss is provided between the aluminum liquid pool and the support plate, the boss is connected and fixed to the aluminum liquid pool, and the screw passes through the connecting plate and is threadedly connected to the boss.

[0014] Furthermore, a connecting ring is installed at the end of the horizontal cylinder away from the pipe joint, and the cylinder cover is connected to the connecting ring by multiple sets of bolts.

[0015] Furthermore, a branch pipe is installed at the end of the cross cylinder near the pipe joint, and the end of the branch pipe away from the cross cylinder is connected to the pipe joint.

[0016] Furthermore, a flange ring is installed at the end of the pipe joint away from the electric valve, and a plurality of small holes are equidistantly spaced on one side of the flange ring.

[0017] Furthermore, the bottom of the aluminum liquid pool is provided with multiple evenly arranged brackets, the brackets are U-shaped structures, the brackets are connected and fixed to the aluminum liquid pool, and two lifting lugs are installed on the upper part of the two opposite sides of the aluminum liquid pool.

[0018] The beneficial effects of this utility model are:

[0019] 1. Connect the two pipe fittings to the nitrogen and argon delivery pipes respectively. By alternately controlling the opening of the two electric valves, nitrogen and argon can be introduced into the molten aluminum separately. Nitrogen and argon share the same channel formed by the gas distribution pipe and U-shaped pipe, so that nitrogen and argon can each exert their respective advantages to treat the molten aluminum.

[0020] 2. When switching the two electric valves on and off, both pipes connected to the electric valves are in a gas supply state. After the electric valve that needs to be closed is closed, the gas pressure in the corresponding pipe of the closed electric valve increases. At this time, the nitrogen or argon gas in the corresponding pipe enters the horizontal cylinder. The piston in the horizontal cylinder squeezes the spring, further compressing the spring and providing space for storing nitrogen or argon gas, which plays a protective role for the pipeline system. In summary, this ensures that the gas flow rate from the first and second gas outlets will not decrease during the switching of electric valves, preventing molten aluminum from entering the channel formed by the gas distribution pipe and the U-shaped pipe. Later, it is not necessary to spend a lot of time waiting for the molten aluminum to be discharged from the channel formed by the gas distribution pipe and the U-shaped pipe, thus improving the efficiency of molten aluminum transfer.

[0021] 3. Use screws to connect the boss and the connecting plate to complete the connection between the cross cylinder and the aluminum liquid tank, thereby strengthening the overall structure and improving stability. At the same time, the boss locally increases the thickness of the area where the screws are installed in the aluminum liquid tank. Attached Figure Description

[0022] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the structure of an aluminum liquid degassing device according to the present invention;

[0024] Figure 2 This is another perspective view of the aluminum liquid degassing device of this utility model;

[0025] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 4 This is a partial explosion diagram of an aluminum liquid degassing device according to the present invention;

[0027] In the picture:

[0028] 1. Aluminum liquid tank; 11. Lifting lug; 12. Bracket; 13. Boss;

[0029] 2. Air distribution pipe; 21. U-shaped pipe; 22. Connecting pipe;

[0030] 3. Horizontal cylinder; 31. Cylinder cover; 32. Branch pipe; 33. Support plate; 34. Connecting plate; 35. Piston; 36. Spring; 37. Connecting ring;

[0031] 4. Electric valve;

[0032] 5. Pipe fittings; 51. Flange rings;

[0033] 6. Screws. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0035] Please see Figure 1 and Figure 2 This utility model provides a technical solution: an aluminum liquid degassing device, including an aluminum liquid pool 1, with a plurality of evenly arranged brackets 12 at the bottom of the aluminum liquid pool 1. The brackets 12 have a "U" shaped structure and are connected and fixed to the aluminum liquid pool 1. Two lifting lugs 11 are installed at the upper positions of the two opposite sides of the aluminum liquid pool 1. The brackets 12 provide balanced support for the aluminum liquid pool 1 and improve the stability of the aluminum liquid pool 1 structure.

[0036] See Figures 1-4 The gas distribution pipe 2 is located in the lower part of the aluminum liquid pool 1. One end of the gas distribution pipe 2 passes through the aluminum liquid pool 1 and extends to the outside of the aluminum liquid pool 1. Multiple first gas outlet holes are evenly opened on the lower part of the outer surface of the gas distribution pipe 2. A U-shaped pipe 21 is installed at the end of the gas distribution pipe 2 inside the aluminum liquid pool 1. The U-shaped pipe 21 is horizontally set in the aluminum liquid pool 1. Multiple second gas outlet holes are evenly opened on the lower part of the outer surface of the U-shaped pipe 21. The gas distribution pipe 2 and the U-shaped pipe 21 form a common channel for conveying nitrogen and argon.

[0037] See Figures 1-4 A connecting pipe 22 is installed at one end of the gas distribution pipe 2 located outside the aluminum liquid pool 1. Two electric valves 4 are provided, installed at both ends of the connecting pipe 22 respectively. Two pipe joints 5 are provided, installed at the ends of the electric valves 4 away from the connecting pipe 22 respectively. A flange ring 51 is installed at the end of the pipe joint 5 away from the electric valve 4. Multiple small holes are equidistantly opened on one side of the flange ring 51 in a ring shape, so that the two pipe joints 5 can be connected to the nitrogen supply pipeline and the argon supply pipeline respectively. By alternately controlling the opening of the two electric valves 4, nitrogen and argon can be introduced into the aluminum liquid separately. Nitrogen and argon can share the channel formed by the gas distribution pipe 2 and the U-shaped pipe 21, so that nitrogen and argon can each exert their respective advantages to treat the aluminum liquid.

[0038] See Figures 1-4A horizontal cylinder 3 is installed on and connected to a pipe joint 5. A branch pipe 32 is installed at the end of the horizontal cylinder 3 closest to the pipe joint 5. The end of the branch pipe 32 away from the horizontal cylinder 3 is connected to the pipe joint 5. A detachable cylinder cover 31 is installed at the end of the horizontal cylinder 3 away from the pipe joint 5. A connecting ring 37 is installed at the end of the horizontal cylinder 3 away from the pipe joint 5. The cylinder cover 31 is connected to the connecting ring 37 by multiple sets of bolts. A vent hole is opened in the middle of one side of the cylinder cover 31. A piston 35 is slidably installed inside the horizontal cylinder 3 on the side closest to the pipe joint 5. A spring 36 in a compressed state is provided between the piston 35 and the cylinder cover 31. The spring 36 is arranged inside the horizontal cylinder 3 and along the length of the horizontal cylinder 3. During the switching process of the two electric valves 4, the pipeline is kept in a stable gas supply state: when the electric valve 4 that needs to be closed is closed, the gas pressure in its corresponding pipeline will increase due to the continuous gas input. At this time, nitrogen or argon in the pipeline will flow into the horizontal cylinder 3, pushing the piston 35 in the horizontal cylinder 3 to move towards the cylinder cover 31, thereby squeezing the spring 36 to further compress it. This process provides a temporary storage space for excess gas, effectively buffering the pressure fluctuations in the pipeline and protecting the pipeline system.

[0039] Through this mechanism, the gas flow rate of the first vent of the gas distribution pipe 2 and the second vent of the U-shaped pipe 21 remains stable during the switching of the electric valve 4, completely avoiding the risk of aluminum liquid backflow caused by a sudden decrease in gas volume during the traditional switching process. Therefore, after the aluminum liquid is transferred from the aluminum liquid pool 1, there is no need to spend a lot of time waiting for the aluminum liquid to be discharged from the channels of the gas distribution pipe 2 and the U-shaped pipe 21. This saves time per operation, improves the continuity of aluminum liquid transfer and subsequent degassing processes, and increases overall production efficiency.

[0040] See Figure 1 , Figure 3 and Figure 4 A support plate 33 is installed at one end of the horizontal cylinder 3 near the pipe joint 5, and a connecting plate 34 is installed at the other end of the support plate 33 away from the horizontal cylinder 3. The connecting plate 34 is connected to the aluminum liquid tank 1 by multiple screws 6. A boss 13 is provided between the aluminum liquid tank 1 and the support plate 33. The boss 13 is connected and fixed to the aluminum liquid tank 1. The screws 6 pass through the connecting plate 34 and are threaded to the boss 13. By connecting the boss 13 and the connecting plate 34 with screws 6, the horizontal cylinder 3 and the aluminum liquid tank 1 are connected, which strengthens the overall structure and improves stability. At the same time, the boss 13 locally increases the thickness of the aluminum liquid tank 1 at the location where the screws 6 are installed.

[0041] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An aluminum liquid degassing device, characterized in that... include: Aluminum liquid tank (1); A gas distribution pipe (2) is set in the lower part of the aluminum liquid pool (1). One end of the gas distribution pipe (2) passes through the aluminum liquid pool (1) and extends to the outside of the aluminum liquid pool (1). Multiple first gas outlet holes are evenly opened at the lower part of the outer surface of the gas distribution pipe (2). A connecting pipe (22) is installed at the end of the gas distribution pipe (2) located outside the aluminum liquid pool (1). Two electric valves (4) are provided, and the two electric valves (4) are respectively installed at both ends of the connecting pipe (22); There are two pipe fittings (5), and the two pipe fittings (5) are respectively installed at the end of the electric valve (4) away from the connecting pipe (22); A horizontal cylinder (3) is installed on a pipe connector (5) and connected to the pipe connector (5). A detachable cylinder cover (31) is installed at the end of the horizontal cylinder (3) away from the pipe connector (5). A vent hole is provided in the middle of one side of the cylinder cover (31). A piston (35) is slidably installed inside the horizontal cylinder (3) on the side close to the pipe connector (5). A spring (36) in a compressed state is provided between the piston (35) and the cylinder cover (31). The spring (36) is arranged inside the horizontal cylinder (3) and along the length direction of the horizontal cylinder (3).

2. The aluminum liquid degassing device according to claim 1, characterized in that: The gas distribution pipe (2) is installed with a U-shaped pipe (21) at one end inside the aluminum liquid pool (1). The U-shaped pipe (21) is horizontally arranged inside the aluminum liquid pool (1), and multiple second gas outlet holes are evenly opened at the lower part of the outer surface of the U-shaped pipe (21).

3. The aluminum liquid degassing device according to claim 1, characterized in that: A support plate (33) is installed at one end of the horizontal cylinder (3) near the pipe joint (5), and a connecting plate (34) is installed at the other end of the support plate (33) away from the horizontal cylinder (3). The connecting plate (34) is connected to the aluminum liquid pool (1) by multiple screws (6).

4. The aluminum liquid degassing device according to claim 3, characterized in that: A boss (13) is provided between the aluminum liquid pool (1) and the support plate (33). The boss (13) is connected and fixed to the aluminum liquid pool (1). The screw (6) passes through the connecting plate (34) and is threaded to the boss (13).

5. The aluminum liquid degassing device according to claim 1, characterized in that: A connecting ring (37) is installed at the end of the horizontal cylinder (3) away from the pipe joint (5), and the cylinder cover (31) is connected to the connecting ring (37) by multiple sets of bolts.

6. The aluminum liquid degassing device according to claim 5, characterized in that: A branch pipe (32) is installed at one end of the horizontal cylinder (3) near the pipe joint (5), and the end of the branch pipe (32) away from the horizontal cylinder (3) is connected to the pipe joint (5).

7. The aluminum liquid degassing device according to claim 1, characterized in that: The pipe joint (5) is equipped with a flange ring (51) at the end away from the electric valve (4), and the flange ring (51) has multiple small holes equidistantly arranged on one side in a ring shape.

8. The aluminum liquid degassing device according to claim 1, characterized in that: The bottom of the aluminum liquid pool (1) is provided with a plurality of evenly arranged brackets (12). The brackets (12) are U-shaped structures. The brackets (12) are connected and fixed to the aluminum liquid pool (1). Two lifting lugs (11) are installed on the upper part of the two opposite sides of the aluminum liquid pool (1).

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