Vacuum and rotary injection composite efficient degassing device for aluminum alloy refining

Abstract

The utility model discloses a vacuum and rotary blowing composite efficient degassing device for aluminum alloy refining, which comprises a smelting container, a driving mechanism, two groups of stirring mechanisms, a vacuumizing mechanism and a gas supply mechanism, a closed smelting chamber is arranged in the smelting container, and the driving mechanism and the two groups of stirring mechanisms are arranged in the smelting chamber. The driving mechanism is simultaneously in transmission connection with the two groups of stirring mechanisms and drives the two groups of stirring mechanisms to reversely rotate around respective axes, the gas supply mechanism is connected with the stirring mechanisms and is used for inputting specified gas into the smelting chamber through the stirring mechanisms, and the vacuumizing mechanism is connected with the smelting container and is used for forming an air pressure difference in the smelting chamber. According to the vacuum and rotary blowing composite efficient degassing device for aluminum alloy refining, vacuumizing degassing and rotary blowing degassing are combined for combined degassing, the refining time is shortened by more than 30% compared with that of a traditional refiner, the refining effect is good, and the gas content can reach 0.08 ml / 100g or below.

Description

Technical Field

[0001] The utility model relates to alloy melt high-efficiency degassing equipment, in particular to a vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining, belonging to the technical field of casting. Background Art

[0002] After the aluminum alloy is melted, the aluminum element in the alloy is particularly easy to oxidize to generate aluminum oxide. At the same time, the aluminum element reacts with water, carbon dioxide, and carbon monoxide in the air to generate aluminum oxide and other impurities. Aluminum oxide is suspended in the melt in the form of an oxide film and becomes an inclusion. The aluminum element in the aluminum alloy melt is also particularly easy to absorb moisture in the air in the molten state, and the aluminum element reacts with water to generate hydrogen. As the temperature rises, the more moisture the aluminum element in the aluminum alloy melt absorbs, the more hydrogen is generated. There are three main reasons for this situation: first, the charge itself is not clean and contains inclusions and moisture; second, the charge is oxidized during the melting process to generate inclusions; third, the air humidity in the production environment is high, and the charge absorbs moisture in the air during the melting process and reacts with it. Therefore, in order to ensure the quality of the melt, it is necessary to remove hydrogen and inclusions in the melt.

[0003] There are four main existing aluminum alloy refining methods. One is the rotary blowing method. The rotary blowing method is to blow gas (argon or nitrogen) or a mixture of gas and solvent into the melt. Under the action of the impeller, the blown gas is broken into fine bubbles. The air pressure of the bubbles decreases during the floating process, and the gas and inclusions in the melt enter the bubbles and float to the surface of the melt with the bubbles. However, this method uses a rotary blowing method for refining under normal pressure in the atmosphere. Before rotary refining, the gas in the alloy liquid will not naturally float to the liquid surface and be discharged. Although the gas and inclusions in the alloy liquid can float together with the blown bubbles during rotary refining, the bubbles are not powered by insufficient power to rise. A certain proportion of hydrogen and inclusions still exist in the refined alloy liquid, and the refining time of this method is relatively long, generally between 15 and 30 minutes. The second is the bottom blowing method. The bottom blowing method is to blow gas (argon or nitrogen) from the bottom of the crucible. The air pressure decreases during the floating process of the bubbles. The gas and inclusions in the melt enter the bubbles and float to the surface of the melt with the bubbles. However, the disadvantage of this method is that the blown gas is not broken, the number of bubbles is small, the position of the blown bubbles is fixed, and the entire crucible cannot be taken into account, and the refining effect is poor. The third is the vacuum degassing method. The vacuum degassing method is to evacuate the crucible and rely on negative pressure to make the gas in the melt float up and degas. The disadvantage of this method is that it only relies on negative pressure to make the gas in the melt float up and degas. The power of gas floating is insufficient, the degassing effect is limited, and there is a lot of residual gas in the melt. The fourth is the vacuum and rotary refining composite method.

[0004] For example, CN110172600A discloses a composite degassing and grain refinement device and a method of using a cast aluminum alloy melt. The invented patent has the following disadvantages: the rotor speed is too fast, reaching 800 to 1500 revolutions. Such high-speed rotation can easily cause damage to the rotor and cause safety accidents; the use of a steel crucible inner wall does not conform to the smelting rules of aluminum alloys and will cause a large amount of iron to be added to the melt; the refining time is too long, and the refining time of this method is no different from that of the traditional method, and may even be longer, which seriously affects production efficiency; the motor is placed outside the vacuum cover, and the seal is unreliable, which can easily cause air leakage. Fifth, the upper part of the vacuum cover is flat, which does not conform to the manufacturing principle of the pressure vessel and can easily cause safety problems. Utility Model Content

[0005] The main purpose of the utility model is to provide a vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining, so as to overcome the shortcomings of the prior art.

[0006] In order to achieve the above-mentioned utility model purpose, the technical solution adopted by the utility model includes:

[0007] The utility model provides a vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining, comprising:

[0008] A smelting container, wherein the smelting container has a sealed smelting chamber inside, wherein a heat insulation mechanism is arranged in the smelting chamber, wherein the heat insulation mechanism divides the smelting chamber into a first chamber and a second chamber, wherein the first chamber is arranged above the second chamber along the axial direction of the smelting container;

[0009] A driving mechanism is disposed in the first chamber;

[0010] At least two stirring mechanisms are arranged in parallel in the second chamber, the stirring mechanism is connected to the driving mechanism in a transmission manner and can rotate around its own axis under the drive of the driving mechanism, and an air flow channel is also arranged inside the stirring mechanism, and an air inlet and a plurality of air outlets are also arranged on the surface of the stirring mechanism, and the air inlet and the air outlet are connected to the air flow channel:

[0011] a vacuum pumping mechanism, connected to the first chamber and used to form an air pressure difference between the first chamber and the second chamber;

[0012] The air supply mechanism is connected with the air flow channel inside the stirring mechanism through the air inlet, and is at least used to input the specified gas into the second chamber through the air outlet on the stirring mechanism.

[0013] Furthermore, the smelting container includes a container body and a vacuum cover, the vacuum cover is covered on the container body and encloses a closed smelting chamber, the thermal insulation mechanism is fixedly arranged in the vacuum cover, the vacuum cover and the thermal insulation mechanism enclose the first chamber, and the vacuum cover, the thermal insulation mechanism and the container body enclose the second chamber.

[0014] Furthermore, the vacuum cover and / or the container body are also provided with an observation window.

[0015] Furthermore, the smelting container further comprises a sealing mechanism, which is continuously arranged between the container body and the vacuum cover. The sealing mechanism can be deformed under the pressure of the vacuum cover and adaptively seal and fit with the container body and the vacuum cover.

[0016] Furthermore, a continuous sealing groove is provided on the container body and / or the vacuum cover, and at least a portion of the sealing mechanism is provided in the sealing groove, wherein a portion of the sealing mechanism located in the sealing groove is compressed and fits tightly against the groove wall of the sealing groove.

[0017] Furthermore, the gas supply mechanism includes a gas supply source and a gas pipeline, the gas pipeline is respectively connected to the gas supply source and the air flow channel inside the stirring mechanism, and the gas pipeline is rotatably matched with the stirring mechanism, and at least the part of the gas pipeline located in the second chamber is heat conductive.

[0018] Furthermore, the gas pipeline includes multiple gas pipes and at least two switching mechanisms, the switching mechanism has a through cavity inside, the gas pipe is fixedly connected to the switching mechanism and communicated with the cavity, the stirring mechanism is partially arranged in the cavity, and rotates and seals with the switching mechanism, the cavity is isolated from the outside, and the air inlet is located in the cavity and communicated with the cavity.

[0019] Furthermore, the adapter mechanism includes an adapter block and two sealed bearings, the two sealed bearings are coaxially and spaced apart in the cavity, the outer ring of the sealed bearing is fixedly connected to the adapter block, the inner ring is fixedly connected to the stirring mechanism, and the air inlet is located between the two sealed bearings.

[0020] Furthermore, the driving mechanism is connected to at least two of the stirring mechanisms via a transmission assembly, the transmission assembly includes at least two meshing gears, the axes of at least two of the gears are parallel, each of the gears is coaxially fixedly connected to a stirring mechanism, one of the stirring mechanisms is directly connected to the driving mechanism, and the remaining stirring mechanisms are indirectly driven via at least two of the gears, and the rotation directions of at least two of the stirring mechanisms are opposite.

[0021] Furthermore, the stirring mechanism includes a stirring shaft and paddles, the stirring shaft is transmission-connected to the driving mechanism, the paddles are fixed on the stirring shaft, the air flow channel is arranged inside the stirring shaft, the air inlet and the air outlet are arranged on the side of the stirring shaft, and the plurality of air outlets are spaced apart along the axial and circumferential directions of the stirring shaft, and the stirring shaft rotates and seals with the adapter mechanism.

[0022] In a more specific implementation case, the vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining also includes a mounting platform, a lifting mechanism and a rotating mechanism. The lifting mechanism and the rotating mechanism are fixedly arranged on the mounting platform. The lifting mechanism is used to drive the smelting container to lift and lower, and the rotating mechanism is used to drive the smelting container to rotate.

[0023] Furthermore, the installation platform is also provided with universal wheels.

[0024] Compared with the prior art, the advantages of the utility model include:

[0025] The utility model provides a vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining, which inputs gas into the alloy liquid through the stirring shaft and makes at least two stirring shafts rotate in opposite directions, thereby increasing the number and distribution of bubbles formed in the alloy liquid, thereby improving the efficiency and quality of impurity removal;

[0026] The utility model provides a vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining, which uses the alloy liquid in the smelting container as a heat source to preheat the gas provided by the gas supply mechanism, thereby reducing the temperature difference between the gas entering from the outside and the alloy liquid, thereby improving the refining effect;

[0027] The utility model provides a vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining, which adopts vacuum degassing and rotary blowing degassing to carry out combined degassing. The refining time is shortened by more than 30% compared with the traditional refiner, and the refining effect is good, and the gas content can reach below 0.08ml / 100g. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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 recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of a vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining provided in a typical implementation case of the utility model;

[0030] Figure 2 It is a structural schematic diagram of a gas supply mechanism and a stirring mechanism in a vacuum and rotary spray composite high-efficiency degassing device for aluminum alloy refining provided in a typical implementation case of the utility model;

[0031] Figure 3 It is a structural schematic diagram of a gas supply mechanism in a vacuum and rotary spray composite high-efficiency degassing device for aluminum alloy refining provided in a typical implementation case of the utility model;

[0032] Figure 4 It is a partial enlarged view of the connection between the air supply mechanism and the stirring mechanism in a vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining provided in a typical implementation case of the utility model. DETAILED DESCRIPTION

[0033] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the utility model after long-term research and extensive practice. The technical solution, its implementation process and principle, etc. will be further explained and illustrated in combination with the accompanying drawings and specific implementation cases. It should be noted that the specific implementation case of the utility model is intended to explain and illustrate the structural composition and working principle of the vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining. Unless otherwise specified, the container body, vacuum cover, sealed bearing, rotary motor, vacuum pump, etc. therein can be known to those skilled in the art, and their specific shapes, structures, etc. are not limited here.

[0034] Example 1

[0035] See also Figure 1-Figure 4A hanging type vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining, comprising: a smelting container 1, two groups of stirring mechanisms 2, a gas supply mechanism 3, a vacuum pumping mechanism 4 and a driving mechanism 5. The smelting container 1 has a closed smelting chamber inside, and the driving mechanism 5 and the two groups of stirring mechanisms 2 are arranged in the smelting chamber. The driving mechanism 5 is simultaneously connected to the two groups of stirring mechanisms 2 in a transmission manner, and drives the two groups of stirring mechanisms 2 to rotate in opposite directions around their respective axes. The gas supply mechanism 3 is connected to the stirring mechanism 2 and is used to input a specified gas into the smelting chamber through the stirring mechanism 2. The vacuum pumping mechanism 4 is connected to the smelting container 1 and is used to form a pressure difference in the smelting chamber.

[0036] Specifically, a heat insulating mechanism is provided in the smelting chamber inside the smelting container 1, and the heat insulating mechanism divides the smelting chamber into a first chamber and a second chamber, the first chamber is arranged above the second chamber along the axial direction of the smelting container 1, and the second chamber is used to accommodate the alloy liquid, wherein the driving mechanism 5 is arranged in the first chamber, and two groups of stirring mechanisms 2 are arranged in parallel in the second chamber, at least part of the stirring mechanism 2 is immersed below the liquid level of the alloy liquid, and the vacuum mechanism 4 cooperates with the first chamber to form an air pressure difference between the first chamber and the second chamber.

[0037] Specifically, the heat insulation mechanism can be a heat insulation plate extending radially along the smelting container 1, and the heat insulation plate is mainly used to isolate the high-temperature alloy liquid in the second chamber from the driving mechanism 5, so as to isolate the high temperature of the alloy liquid in the second chamber. The reason for setting the heat insulation mechanism is mainly because the maximum melting temperature of the aluminum alloy liquid is 760°C, and the frequency conversion high temperature resistant motor and the bearings used for transmission and other components are subjected to large heat, which is easy to cause the motor and bearings to fail prematurely, affecting the service life of the device. Therefore, a heat insulation mechanism is set in the smelting chamber to divide the smelting chamber into two working rooms, so that the working temperature of the driving mechanism 5 and the transmission mechanism is controlled below 350°C. It should be noted that the heat insulation mechanism mainly realizes the thermal isolation between the first chamber and the second chamber, but does not make the first chamber and the second chamber closed and isolated, and in turn ensures that the vacuum mechanism 4 forms a pressure difference between the first chamber and the second chamber, and the pressure difference is used to drive the bubbles in the alloy liquid in the second chamber to float up quickly.

[0038] Specifically, the smelting container 1 includes a container body 11 and a vacuum cover 12, the vacuum cover 12 covers the container body 11 and encloses a closed smelting chamber, the thermal insulation mechanism is fixedly arranged in the vacuum cover 12, the vacuum cover 12 and the thermal insulation mechanism enclose the first chamber, and the vacuum cover 12, the thermal insulation mechanism and the container body 11 enclose the second chamber.

[0039] More specifically, flanges may be provided on both the container body 11 and the vacuum cover 12, and the flanges on the container body 11 and the vacuum cover 12 are fixedly connected to achieve fixed combination of the two. More specifically, the vacuum cover 12 may be a spherical or hemispherical structure, and the function of the vacuum cover 12 is to cooperate with the vacuum pumping mechanism 4 to form a low vacuum environment of about -80 kPa in the first chamber of the smelting container 1. In order to ensure the pressure bearing capacity of the vacuum cover 12, the vacuum cover 12 may be made of 310S stainless steel plate.

[0040] Specifically, in order to ensure that the vacuum cover 12 and the container body 11 are sealed and connected so that the smelting chamber is in a closed state, a sealing mechanism 13 is also provided between the container body 11 and the vacuum cover 12. The sealing mechanism 13 is continuously provided between the container body 11 and the vacuum cover 12, and the sealing mechanism 13 can be deformed under the pressure of the vacuum cover 12, and can be adaptively sealed and fitted with the container body 11 and the vacuum cover 12. The sealing mechanism 13 that can be deformed under external pressure can not only improve the sealing effect, but also balance the vibration caused by the driving mechanism 5 driving the stirring mechanism 2 to work, so as to ensure that the smelting container 1 does not leak when working. More specifically, a continuous sealing groove is also provided on the container body 11 and / or the vacuum cover 12, and at least a part of the sealing mechanism 13 is provided in the sealing groove, wherein a part of the sealing mechanism 13 located in the sealing groove is compressed and closely fits with the groove wall of the sealing groove. It can be understood that the sealing mechanism 13 is preferably a ring-shaped member, and exemplary, the sealing mechanism 13 can be a rubber ring or a graphene gasket.

[0041] In order to facilitate observation of the conditions inside the furnace, observation windows may be provided on the vacuum cover 12, the heat insulating mechanism and the container body 11. The observation windows are made of heat-resistant quartz glass.

[0042] Specifically, the smelting container 1 is used to accommodate the alloy liquid, and the alloy liquid is accommodated in the smelting chamber. At least part of the two groups of stirring mechanisms 2 are located below the liquid surface of the alloy liquid. The two groups of stirring mechanisms 2 rotate around their respective axes under the drive of the driving mechanism 5, and the rotation directions of the two groups of stirring mechanisms are opposite. It should be noted that the stirring mechanism 2 in the utility model is used to stir the alloy liquid on the one hand, and the two groups of counter-rotating stirring mechanisms 2 can better stir the alloy liquid and improve the stirring efficiency; on the other hand, the stirring mechanism 2 is also connected to the gas supply mechanism 3 and serves as a part of the gas supply passage of the gas supply mechanism 3. The gas provided by the gas supply mechanism 3 can be discharged from the stirring mechanism 2 and enter the alloy liquid to form bubbles. The two groups of stirring mechanisms 2 not only improve the distribution range of the bubbles in the alloy liquid, but also improve the distribution uniformity of the bubbles in the alloy liquid. At the same time, the two groups of stirring mechanisms 2 rotate in opposite directions, which further improves the bubble crushing effect and efficiency, and then further increases the number of bubbles in the alloy liquid, thereby improving the efficiency and quality of bubble impurity removal.

[0043] Under the action of negative pressure, the upper surface pressure of the alloy liquid decreases, and the gas in the alloy liquid is more likely to float. At the same time, the driving mechanism drives the ventilated stirring shaft to rotate, and the blown gas is broken into small bubbles. Under the action of negative pressure, these small bubbles are also easy to float and grow. At this time, the pressure in the bubble is lower than the pressure in the surrounding alloy liquid. The gas and inclusions in the alloy liquid are more likely to enter these blown bubbles and float to the liquid surface together. After refining, the liquid is cleaned up to achieve the purpose of degassing and slag removal. Under negative pressure, it is conducive to the floating of inclusions and gases in the alloy liquid, so that the degassing effect is more significant. The gas content of the refined alloy liquid can reach less than 0.08ml / 100g. And the refining time is shorter. Due to the double superposition of negative pressure and rotary blowing, the refining time is shortened from the original 15 to 30 minutes to 5 to 10 minutes.

[0044] Specifically, the structures of the two groups of stirring mechanisms 2 can be the same. More specifically, the stirring mechanism 2 includes a hollow stirring shaft 21 and a paddle 22. The stirring shaft 21 is transmission-connected to the driving mechanism 5, and the paddle 22 is fixed on the stirring shaft 21. An air flow channel 211 is arranged inside the stirring shaft 21, and an air inlet 212 and an air outlet are arranged on the surface of the stirring shaft 21. The air inlet 212 and the air outlet are respectively connected to the air flow channel 211, and the air supply mechanism 3 is connected to the air inlet 212 of the stirring shaft 21. An air flow passage for continuous flow of gas is formed between the air supply mechanism 3, the air inlet 212, the air flow channel 211 and the air outlet.

[0045] Specifically, the driving mechanism 5 is connected to the two stirring shafts 21 of the two groups of stirring mechanisms 2 through a transmission assembly, wherein the transmission assembly includes two meshing gears, the axes of the two gears are parallel, and each gear is coaxially fixedly connected to a stirring shaft 21, wherein one stirring shaft 21 is directly connected to the driving mechanism 5, and the two meshing gears of the other stirring shaft 21 are indirectly driven, so that the two stirring shafts 21 can be synchronously driven by the same driving mechanism 5 and rotate in opposite directions.

[0046] It should be noted that the spacing between the two stirring shafts 21 can be changed by adjusting the size of the gears. The sizes of the two gears can be the same or different. It can be understood that when the sizes of the two gears are different, the rotation speeds of the two stirring shafts 21 are different, and of course, the number of meshing gears can be increased to achieve transmission between the two stirring shafts 21.

[0047] In this embodiment, the drive mechanism 5 adopts a variable frequency high temperature resistant motor, and the output speed of the motor is adjusted by changing the frequency, so that the device has a compact structure, a low failure rate, and a higher reliability. Specifically, the drive mechanism 5 can be fixed on the insulation mechanism or the vacuum cover 12. The fixing structure and method of the drive mechanism 5 and the smelting container 1 are not specifically limited here.

[0048] Specifically, the air inlet 212 is arranged in the upper area of ​​the stirring shaft 21 close to the driving motor, and the air inlet 212 is distributed along the circumferential direction of the stirring shaft 21. The air inlet 212 can be a single annular structure or a plurality of air inlet holes; a plurality of air outlets are arranged, and the plurality of air outlets are distributed axially and circumferentially at intervals along the stirring shaft 21.

[0049] Specifically, the air supply mechanism 3 includes an air supply source 31 and an air pipeline 32 , the air pipeline 32 is respectively connected to the air supply source 31 and the air flow channel 211 inside the stirring mechanism 2 , and the air pipeline 32 is rotationally matched and connected to the two stirring shafts 21 .

[0050] More specifically, the portion where the gas pipeline 32 is connected to the stirring shaft 21 is located in the second chamber and below the heat insulation mechanism, and the portion where the gas pipeline 32 is connected to the stirring shaft 21 is heat-conductive, so that the gas provided by the gas supply source 31 can be heated by the heat radiated by the alloy liquid in the second chamber in the gas pipeline 32 before entering the stirring shaft 21. It should be noted that the temperature of the gas output from the gas supply source 31 is very different from the temperature of the alloy liquid. If the gas output from the gas supply source 31 is directly introduced into the alloy liquid in the smelting container, the temperature of the alloy liquid will drop, affecting the refining effect. The gas pipeline 32 is set between the heat insulation mechanism and the liquid surface of the alloy liquid. When the device is placed on the crucible, the heat of the alloy liquid will heat the gas in the gas pipeline 32 and increase its temperature, thereby reducing the temperature difference between the introduced gas and the alloy liquid. Exemplarily, the gas provided by the gas supply source may be argon, and the gas supply source may be an argon gas cylinder, etc. It can be understood that in order to pass the gas in the gas supply source into the smelting chamber, an air pump or the like may be provided on the gas pipeline 32 to provide driving force.

[0051] For details, please refer to Figure 3 and Figure 4 , Figure 4 yes Figure 1 A partial enlarged view of the structure M, wherein the gas pipeline 32 includes a plurality of gas pipes 321 and at least two adapter mechanisms 322, the adapter mechanism 322 having a through hole inside, the gas pipe 321 is fixedly connected to the adapter mechanism 322 and communicated with the hole, a part of the stirring shaft 21 is arranged in the hole (it can be understood that the stirring shaft passes through the hole), and rotates and seals with the adapter mechanism 322, the hole is isolated from the outside, the air inlet 212 is located in the hole and communicates with the hole, thereby realizing the mutual connection and rotation cooperation of the stirring shaft 21 and the gas pipeline 32.

[0052] More specifically, the adapter mechanism 322 includes an adapter block and two sealed bearings. The cavity is arranged in the adapter block. The adapter block is connected and conducted with the air pipe 321. The two sealed bearings are coaxially and spaced apart in the cavity. The outer ring of the sealed bearing is fixedly connected to the adapter block, and the inner ring is fixedly connected to the stirring shaft 21. The air inlet 212 is located between the two sealed bearings, thereby realizing the conduction and rotation coordination between the stirring shaft 21 and the air pipeline 32.

[0053] Specifically, the vacuum pumping mechanism 4 can be a vacuum pump, etc. The vacuum pumping mechanism 4 is mainly used to form an air pressure difference between the first chamber and the second chamber. Driven by the air pressure difference, the bubbles in the alloy liquid in the second chamber can escape from the alloy liquid quickly under the drive of the air pressure difference. The specific structure of the vacuum pumping mechanism 4 is not limited here.

[0054] Specifically, a lifting ring 121 may be fixedly provided on the top of the vacuum cover 12, and the lifting ring 121 is mainly used to cooperate with a crane, etc., to realize the transfer of the entire device. Exemplarily, the lifting ring 121 is fixed by a crane to transport the device to a melting furnace to be refined, and the flange of the vacuum cover is aligned with the flange of the container body by lifting and lowering the crane, and the device is started to perform vacuuming, refining and other operations. During the refining process, gas (argon or nitrogen) can be introduced separately, and a solvent for refining can also be introduced during the process of passing gas.

[0055] Example 2

[0056] A vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining of a movable small vehicle is basically the same as the device in Example 1, and the same parts of the two are not repeated here. The difference between the two is:

[0057] The vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining in this embodiment also includes a mounting platform with universal wheels, a lifting mechanism and a rotating mechanism. The lifting mechanism and the rotating mechanism are fixedly arranged on the mounting platform. The lifting mechanism is used to drive the smelting container to lift and lower, and the rotating mechanism is used to drive the smelting container to rotate. The device in this embodiment can be moved to the side of the melting furnace to be refined under human power, and then the lifting mechanism and the rotating mechanism are adjusted to align the flange of the vacuum cover with the flange of the container body, and the equipment is started to perform vacuuming, refining and other operations. Gas (argon or nitrogen) can be introduced during the refining process, and solvents for refining can also be introduced during the gas passing process.

[0058] Example 3

[0059] A fixed position rotatable vacuum and rotary blowing composite high-efficiency degassing device for aluminum alloy refining, which has a structure basically the same as that of the device in Example 2, and the same parts of the two are not repeated here. The difference between the two is that:

[0060] The installation platform in this embodiment is fixed. The device in this embodiment is fixed near the smelting furnace and can radiate 2 to 3 melting furnaces. The refiner is aligned with the melting furnace through the rotating mechanism, and then the lifting mechanism is adjusted to align the flange of the vacuum cover with the flange of the container body. The equipment is started to perform vacuuming, refining and other operations. Gas (argon or nitrogen) can be introduced during the refining process, and the solvent used for refining can also be introduced during the gas passing process.

[0061] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as commonly understood by ordinary technicians in the technical field to which the present invention belongs.

[0062] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0063] It should be understood that the above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A vacuum and rotary spray composite high-efficiency degassing device for aluminum alloy refining, characterized in that: include: A smelting container, wherein the smelting container has a sealed smelting chamber inside, wherein a heat insulation mechanism is arranged in the smelting chamber, wherein the heat insulation mechanism divides the smelting chamber into a first chamber and a second chamber, wherein the first chamber is arranged above the second chamber along the axial direction of the smelting container; A driving mechanism is disposed in the first chamber; At least two stirring mechanisms are arranged in parallel in the second chamber, the stirring mechanism is in transmission connection with the driving mechanism and can rotate around its own axis under the drive of the driving mechanism, and an air flow channel is also arranged inside the stirring mechanism, and an air inlet and a plurality of air outlets are also arranged on the surface of the stirring mechanism, and the air inlet and the air outlet are connected to the air flow channel; a vacuum pumping mechanism, connected to the first chamber and used to form an air pressure difference between the first chamber and the second chamber; The air supply mechanism is connected with the air flow channel inside the stirring mechanism through the air inlet, and is at least used to input the specified gas into the second chamber through the air outlet on the stirring mechanism.

2. The vacuum and rotary spray composite high-efficiency degassing device for aluminum alloy refining according to claim 1 is characterized in that: The smelting container comprises a container body and a vacuum cover, wherein the vacuum cover is covered on the container body and encloses to form a closed smelting chamber, the heat insulation mechanism is fixedly arranged in the vacuum cover, the vacuum cover and the heat insulation mechanism enclose to form the first chamber, and the vacuum cover, the heat insulation mechanism and the container body enclose to form the second chamber; And / or, the vacuum cover and / or the container body are also provided with an observation window.

3. The vacuum and rotary spray composite high-efficiency degassing device for aluminum alloy refining according to claim 2 is characterized in that: The smelting container further comprises a sealing mechanism, which is continuously arranged between the container body and the vacuum cover, and the sealing mechanism can be deformed under the pressure of the vacuum cover and adaptively seal and fit with the container body and the vacuum cover; And / or, a continuous sealing groove is also provided on the container body and / or the vacuum cover, and at least a part of the sealing mechanism is arranged in the sealing groove, wherein a part of the sealing mechanism located in the sealing groove is compressed and fits tightly with the groove wall of the sealing groove.

4. The vacuum and rotary spray composite high-efficiency degassing device for aluminum alloy refining according to claim 2 is characterized in that: The gas supply mechanism includes a gas supply source and a gas pipeline, the gas pipeline is respectively connected to the gas supply source and the air flow channel inside the stirring mechanism, and the gas pipeline is rotationally matched with the stirring mechanism, and at least the part of the gas pipeline located in the second chamber is heat conductive.

5. The vacuum and rotary spray composite high-efficiency degassing device for aluminum alloy refining according to claim 4 is characterized in that: The gas pipeline includes multiple gas pipes and at least two switching mechanisms. The switching mechanism has a through hole inside. The gas pipe is fixedly connected to the switching mechanism and communicates with the hole. The stirring mechanism is partially arranged in the hole and rotates and seals with the switching mechanism. The hole is isolated from the outside world, and the air inlet is located in the hole and communicates with the hole.

6. The vacuum and rotary spraying composite high-efficiency degassing device for aluminum alloy refining according to claim 5 is characterized in that: The adapter mechanism includes an adapter block and two sealed bearings. The two sealed bearings are coaxially and spaced apart in the cavity. The outer ring of the sealed bearing is fixedly connected to the adapter block, and the inner ring is fixedly connected to the stirring mechanism. The air inlet is located between the two sealed bearings.

7. The vacuum and rotary spraying composite high-efficiency degassing device for aluminum alloy refining according to claim 5 or 6, characterized in that: The driving mechanism is connected to at least two stirring mechanisms via a transmission assembly, the transmission assembly includes at least two meshing gears, the axes of at least two of the gears are parallel, each of the gears is coaxially fixedly connected to a stirring mechanism, one of the stirring mechanisms is directly connected to the driving mechanism, and the other stirring mechanisms are indirectly driven via at least two of the gears, and the rotation directions of at least two stirring mechanisms are opposite.

8. The vacuum and rotary spray composite high-efficiency degassing device for aluminum alloy refining according to claim 7 is characterized in that: The stirring mechanism includes a stirring shaft and a paddle, the stirring shaft is transmission-connected to the driving mechanism, the paddle is fixed on the stirring shaft, the air flow channel is arranged inside the stirring shaft, the air inlet and the air outlet are arranged on the side of the stirring shaft, and a plurality of the air outlets are distributed at intervals along the axial and circumferential directions of the stirring shaft, and the stirring shaft rotates and seals with the adapter mechanism.

9. The vacuum and rotary spray composite high-efficiency degassing device for aluminum alloy refining according to claim 1 is characterized in that: It also includes a mounting platform, a lifting mechanism and a rotating mechanism. The lifting mechanism and the rotating mechanism are fixedly arranged on the mounting platform. The lifting mechanism is used to drive the smelting container to lift and lower, and the rotating mechanism is used to drive the smelting container to rotate.

10. The vacuum and rotary spraying composite high-efficiency degassing device for aluminum alloy refining according to claim 9 is characterized in that: The installation platform is also provided with universal wheels.

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