Die casting molten aluminum raw material degassing equipment

Abstract

The utility model relates to the technical field of molten aluminum treatment, in particular to die casting molten aluminum raw material degassing equipment which comprises a molten aluminum tank, a tank cover, a top cover and an exhaust device, the tank cover is sleeved on the top of the molten aluminum tank, the top cover is arranged on the outer side of the top of the tank cover, and the exhaust device is fixedly arranged on the top of the tank cover. The exhaust device comprises a connecting pipe, an electric telescopic rod, a lifting pipe, a mounting frame, an exhaust fan, a connecting seat, a rotating shaft and a cover plate, the connecting pipe is fixed to the top of the tank cover, and the electric telescopic rod is mounted on the inner side of the connecting pipe. Internal exhausted gas can be quickly taken away from the molten aluminum tank through the exhaust device, so that residual hydrogen-containing gas in an unoccupied space at the top of the molten aluminum tank is reduced, shielding gas can be better remained at the top of molten aluminum through quick exhaust, external air entering is reduced through the arrangement of the tank cover, the oxidation speed is reduced, and dissolution of the hydrogen-containing gas is reduced.

Description

Technical Field

[0001] This utility model relates to the field of aluminum liquid treatment technology, and in particular to a degassing device for die-casting aluminum liquid raw materials. Background Technology

[0002] During the solidification process, gases in molten aluminum can form pores, which can impair the mechanical properties and pressure tightness of castings, leading to a decline in casting quality. Molten aluminum is also prone to absorbing gases and oxidizing during the smelting process, producing oxide inclusions. These inclusions can affect the surface quality and internal structure of castings, causing problems such as pinholes, oxide inclusions, and shrinkage porosity. Hydrogen is a gas that is significantly soluble in molten aluminum. If it is not removed in time, it will form pores in the casting, affecting the mechanical properties and appearance quality of the casting. Therefore, it is necessary to degas the molten aluminum before use.

[0003] Existing degassing methods mainly rely on nitrogen rotary jetting. This method causes nitrogen bubbles to rise in the molten aluminum, while hydrogen diffuses from the aluminum into these bubbles and rises with them, thus achieving degassing. However, existing degassing equipment cannot quickly remove the exhaust gas after degassing, resulting in rapid oxidation of the aluminum surface. The lack of necessary exhaust and protection devices leads to incomplete exhaust gas removal, and the gas rising from the molten aluminum cannot be effectively removed from the tank. Therefore, auxiliary equipment is needed during the exhaust process to quickly extract the exhaust gas and to provide necessary protection for the top of the tank. Utility Model Content

[0004] This utility model addresses the deficiencies in the existing technology by providing a degassing device for molten aluminum raw materials used in die casting.

[0005] This utility model is achieved through the following technical solution:

[0006] A degassing device for die-casting molten aluminum raw materials includes an aluminum liquid tank, a tank cover, a top cover, and an exhaust device. The tank cover is fitted onto the top of the aluminum liquid tank, and the top cover is located on the outer side of the top of the tank cover. The exhaust device is fixedly installed on the top of the tank cover. The exhaust device includes a connecting pipe, an electric telescopic rod, a lifting pipe, a mounting frame, an exhaust fan, a connecting seat, a rotating shaft, and a cover plate. The connecting pipe is fixed to the top of the tank cover, the electric telescopic rod is installed inside the connecting pipe, the outer side of the lifting pipe is fixed to the telescopic end of the electric telescopic rod, the mounting frame is fixedly installed on the inner side of the bottom of the lifting pipe, the exhaust fan is connected to the mounting frame, the connecting seat is fixedly installed on the top of the outer side of the connecting pipe, the rotating shaft is movably connected to the connecting seat, and the cover plate is movably connected to the rotating shaft.

[0007] In a preferred embodiment of the present invention, a degassing operation tube is provided on the top of the can lid, the top cover is snapped onto the top outer side of the degassing operation tube on the top of the can lid, and a handle is provided on the top of the top cover.

[0008] The top cover is opened to allow nitrogen to enter the molten aluminum through the rotating nozzle for degassing. After the degassing process is completed, the top cover is closed to prevent air from quickly entering the molten aluminum tank.

[0009] In a preferred embodiment of this utility model, the cover plate is disposed on the top of the connecting pipe, and the area of ​​the cover plate is larger than the cross-sectional area of ​​the top of the connecting pipe;

[0010] During transfer and other operations, the cover plate is placed on top of the connecting pipe to reduce the amount of contact between the molten aluminum and the air, thereby achieving a certain degree of air isolation and slowing down the oxidation and gas dissolution rate.

[0011] In a preferred embodiment of this utility model, the outer wall of the lifting pipe is fitted with the inner wall of the connecting pipe, and an installation block connected to the telescopic end of the electric telescopic rod is fixedly provided on the outer side of the lifting pipe.

[0012] In a preferred embodiment of this utility model, the outer side of the connecting pipe is provided with an installation groove to facilitate the installation of the electric telescopic rod.

[0013] The beneficial effects of this utility model are:

[0014] During the nitrogen rotation degassing process inside the molten aluminum, the degassing equipment for die-casting aluminum liquid can quickly remove the gas discharged from the molten aluminum tank through the exhaust device, thereby reducing the residual hydrogen-containing gas in the empty space at the top of the molten aluminum tank. The rapid exhaust can also better retain protective gas at the top of the molten aluminum. The tank cover reduces the entry of external air, thereby reducing the oxidation rate and the dissolution of hydrogen-containing gas. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the degassing equipment for die-casting aluminum liquid raw materials according to this utility model.

[0016] Figure 2 This is a schematic diagram of the tank cover structure of the die-cast aluminum liquid raw material degassing equipment of this utility model.

[0017] Figure 3 This is a schematic diagram of the exhaust device structure of the degassing equipment for aluminum liquid raw materials in die casting according to this utility model.

[0018] In the diagram: 1. Aluminum liquid tank; 2. Tank lid; 3. Top cover; 4. Exhaust device; 41. Connecting pipe; 42. Electric telescopic rod; 43. Lifting pipe; 44. Mounting bracket; 45. Exhaust fan; 46. Connecting seat; 47. Rotating shaft; 48. Cover plate. Detailed Implementation

[0019] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. The directional terms mentioned in this utility model, such as "up," "down," "front," "back," "left," "right," "top," and "bottom," are only for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding this utility model, and not for limiting this utility model.

[0020] like Figure 1-3 The device shown is a degassing device for molten aluminum raw materials for die casting, including a molten aluminum tank 1, a tank cover 2, a top cover 3, and an exhaust device 4. The tank cover 2 is fitted onto the top of the molten aluminum tank 1, and the top cover 3 is located on the outer side of the top of the tank cover 2. The exhaust device 4 is fixedly installed on the top of the tank cover 2. The exhaust device 4 includes a connecting pipe 41, an electric telescopic rod 42, a lifting pipe 43, a mounting frame 44, an exhaust fan 45, a connecting seat 46, a rotating shaft 47, and a cover plate 48. The connecting pipe 41 is fixed to the top of the tank cover 2, the electric telescopic rod 42 is installed inside the connecting pipe 41, the outer side of the lifting pipe 43 is fixed to the telescopic end of the electric telescopic rod 42, the mounting frame 44 is fixedly installed on the inner side of the bottom of the lifting pipe 43, the exhaust fan 45 is connected to the mounting frame 44, the connecting seat 46 is fixedly installed on the top of the outer side of the connecting pipe 41, the rotating shaft 47 is movably connected to the connecting seat 46, and the cover plate 48 is movably connected to the rotating shaft 47.

[0021] Specifically, a degassing operation pipe is provided on the top of the tank cover 2, and the top cover 3 is clipped onto the top outer side of the degassing operation pipe on the top of the tank cover 2. A handle is provided on the top of the top cover 3. A cover plate 48 is provided on the top of the connecting pipe 41. The area of ​​the cover plate 48 is larger than the cross-sectional area of ​​the top of the connecting pipe 41. The outer wall of the lifting pipe 43 is fitted with the inner wall of the connecting pipe 41. An installation block connected to the telescopic end of the electric telescopic rod 42 is fixedly provided on the outer side of the lifting pipe 43. An installation groove is provided on the outer side of the connecting pipe 41 to facilitate the installation of the electric telescopic rod 42.

[0022] In this embodiment, after the molten aluminum is poured into the molten aluminum tank 1, it needs to be degassed at the degassing equipment. After the molten aluminum is added into the molten aluminum tank 1, the tank cover 2 is placed over the top of the molten aluminum tank 1. When the molten aluminum tank 1 is moved to the bottom of the degassing equipment, the top cover 3 of the tank cover 2 is opened, and the rotating nozzle of the degassing equipment is inserted into the molten aluminum. The rotating nozzle rotates and sprays nitrogen or other protective gas into the molten aluminum, thereby achieving the effect of degassing the molten aluminum.

[0023] Furthermore, during the degassing process inside the molten aluminum, excess gas rises and is expelled from the molten aluminum tank 1. If the gas density is similar to or lower than that of air, the gas in the molten aluminum tank 1 may not be able to escape smoothly. This can lead to oxidation of the molten aluminum surface or re-dissolving of the gas inside the molten aluminum. Therefore, it is necessary to expel the exhaust gas in a timely manner. At this time, the cover plate 48 is rotated according to the rotating shaft 47, thereby opening the cover plate 48 covering the top of the connecting pipe 41. Then, the electric telescopic rod 42 is extended, causing the lifting pipe 43 to descend to its bottom position close to the liquid surface. The exhaust fan 45 is turned on to quickly expel the residual exhaust gas in the molten aluminum tank 1. Controlling the electric telescopic rod 42 to retract can raise the lifting pipe 43, thereby allowing the exhaust fan 45 to better extract the exhaust gas inside the molten aluminum tank 1, filling the molten aluminum tank 1 with protective gas. After degassing is completed, the cover plate 48 and the top cover 3 are closed to reduce the entry of air, thereby slowing down the oxidation rate and reducing the amount of gas dissolved.

[0024] It should be noted that the parts not covered in this utility model are the same as or can be implemented using existing technology; the various drives in this utility model can be implemented by corresponding power structures such as cylinders, oil cylinders, electric cylinders, and motors in conjunction with connecting rods, guide rods, etc., and are not limited to the structures described in the specification and the drawings.

[0025] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," "set up," "equipped with," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A device for degassing of the raw material of the liquid aluminium for die casting, comprising a tank (1) for the liquid aluminium, a tank cover (2), a top cover (3) and a degassing device (4), characterised in that: The tank cover (2) is sleeved on the top of the molten aluminum tank (1), the top cover (3) is arranged outside the top of the tank cover (2), and the exhaust device (4) is fixedly arranged on the top of the tank cover (2); The exhaust device (4) comprises a connecting pipe (41), an electric telescopic rod (42), a lifting pipe (43), a mounting rack (44), an exhaust fan (45), a connecting seat (46), a rotating shaft (47) and a cover plate (48), the connecting pipe (41) is fixed on the top of the tank cover (2), the electric telescopic rod (42) is mounted on the inner side of the connecting pipe (41), the outer side of the lifting pipe (43) is fixed with the telescopic end of the electric telescopic rod (42), the mounting rack (44) is fixedly arranged on the inner side of the bottom of the lifting pipe (43), the exhaust fan (45) is connected with the mounting rack (44), the connecting seat (46) is fixedly arranged on the top of the outer side of the connecting pipe (41), the rotating shaft (47) is movably connected with the connecting seat (46), and the cover plate (48) is movably connected with the rotating shaft (47).

2. The die casting molten aluminum feed material degassing apparatus according to claim 1, wherein: The top of the tank cover (2) is provided with a degassing operation pipe, the top cover (3) is clamped on the top of the degassing operation pipe of the tank cover (2), and the top of the top cover (3) is provided with a handle.

3. The die casting molten aluminum material degassing apparatus according to claim 1, characterized by: The cover plate (48) is arranged on the top of the connecting pipe (41), and the area of the cover plate (48) is greater than the cross-sectional area of the top of the connecting pipe (41).

4. The die casting molten aluminum material degassing apparatus according to claim 1, characterized by: The outer wall of the lifting pipe (43) is attached to the inner wall of the connecting pipe (41), and the outer side of the lifting pipe (43) is fixedly provided with a mounting block connected with the telescopic end of the electric telescopic rod (42).

5. The die casting molten aluminum material degassing apparatus according to claim 1, characterized by: The outer side of the connecting pipe (41) is provided with a mounting groove facilitating the mounting of the electric telescopic rod (42).

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