Aluminum alloy vacuum static degassing smelting device and method

Abstract

The invention relates to the technical field of aluminum alloy smelting, and specifically discloses an aluminum alloy vacuum static degassing smelting device and method, comprising a cleaning mechanism arranged on the top of a furnace cover and extending into a furnace body and a sewage discharge mechanism arranged on the outer wall of the furnace body, and the cleaning mechanism and the sewage discharge mechanism cooperate to clean impurities generated during the aluminum alloy smelting process, and the top of the furnace body is provided with a degassing mechanism for filling nitrogen into the furnace body, and the degassing mechanism comprises a second pipe body movably arranged on the top of the furnace cover and extending into the furnace body, and the invention prevents the aluminum liquid from accumulating at a nitrogen discharge port while conveying nitrogen into the aluminum liquid through the degassing mechanism, and facilitates the discharge of impurities such as hydrogen from the aluminum liquid, while avoiding affecting the next smelting use, and facilitates the cleaning mechanism and the sewage discharge mechanism to clean impurities such as aluminum slag attached to the aluminum liquid surface according to the height of the aluminum liquid surface.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy smelting, and in particular to an aluminum alloy vacuum static degassing smelting device and method. Background Art

[0002] The aluminum liquid formed after smelting contains gas and various harmful impurities. During the smelting process of aluminum alloy, degassing is usually required to purify the aluminum liquid and prevent the formation of pores and slag inclusions in the castings, so as to improve the purity of the aluminum alloy after smelting.

[0003] Liquid is easy to accumulate at the nitrogen discharge pipe. Since the alloy liquid will solidify into aluminum blocks after the temperature drops, it will avoid affecting the next use. Or the accumulated aluminum blocks will melt during the next smelting, but the aluminum blocks accumulated in the nitrogen discharge are difficult to melt quickly, affecting the actual smelting and use. During the aluminum alloy smelting process, the liquid level of the aluminum liquid in the furnace body continues to increase or change. The existing aluminum alloy smelting device is not convenient for real-time cleaning of impurities such as aluminum slag on the aluminum liquid surface, or it is not convenient to clean the impurities when the aluminum alloy liquid is stationary.

[0004] A preparation method and smelting device of a high-strength and high-thermal-conductivity aluminum alloy with publication number CN115058614B, the problem raised in the background technology is: during the slag removal process, if the aluminum liquid in the smelting furnace contacts the air over a large area, it will affect the purity of the aluminum alloy material, and the slag removal efficiency of a slag remover is low, and a large amount of slag ash is easily left on the wall of the smelting furnace, which affects the fusion effect of the aluminum liquid in the smelting furnace, thereby causing the various properties of the produced aluminum alloy material to be far lower than the expected effect.

[0005] Based on the existing technology, there are the following problems:

[0006] When an existing aluminum alloy smelting device is smelting an aluminum alloy, in order to remove impurities such as hydrogen in the aluminum alloy liquid and improve the purity of the aluminum alloy, nitrogen and the like are usually added to the aluminum alloy liquid to discharge hydrogen and the like from the aluminum alloy liquid. However, when discharging nitrogen, the aluminum alloy liquid is prone to accumulate at the nitrogen discharge pipe. Since the alloy liquid will solidify into aluminum blocks after the temperature is lowered, it will not affect the next use. Alternatively, although the accumulated aluminum blocks will melt at the next smelting, the aluminum blocks accumulated in the nitrogen discharge are difficult to melt quickly, affecting the actual smelting use. During the aluminum alloy impurity smelting process, the liquid level of the aluminum liquid in the furnace body continues to increase or change. The existing aluminum alloy smelting device is not convenient for practical use. It is not convenient to clean the aluminum slag and other impurities on the surface of the aluminum liquid, or it is not convenient to clean the impurities when the aluminum alloy liquid is stationary. Referring to the above application documents, although it is convenient to discharge nitrogen into the aluminum alloy liquid, the aluminum liquid is easy to accumulate at the nitrogen discharge port, and it only relies on a spring to control the flow of nitrogen, which is easy to cause the aluminum liquid to enter the nitrogen flow pipeline, affecting the actual use of smelting aluminum alloy, and the centrifugal force generated by stirring gathers the aluminum slag, but it is easy to cause the aluminum slag to enter the aluminum liquid again, affecting the cleaning effect, and it is not convenient to clean the impurities attached to the aluminum alloy when it is stationary. There are certain shortcomings. In order to solve the above problems, an aluminum alloy vacuum static degassing smelting device and method are proposed. Summary of the invention

[0007] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides an aluminum alloy vacuum static degassing smelting device and method, which is convenient for discharging nitrogen while avoiding the accumulation of aluminum alloy liquid in the nitrogen discharge pipe, thereby avoiding affecting the next smelting use, and is convenient for real-time cleaning of impurities such as aluminum slag on the liquid surface of the static aluminum liquid.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an aluminum alloy vacuum static degassing smelting device, comprising a furnace body for smelting aluminum alloy and a furnace cover fixedly arranged on the top of the furnace body, and also comprising a cleaning mechanism arranged on the top of the furnace cover and extending into the furnace body and a sewage discharge mechanism arranged on the outer wall of the furnace body, through which the cleaning mechanism and the sewage discharge mechanism cooperate to clean the impurities generated during the aluminum alloy smelting process, and a degassing mechanism for filling nitrogen into the furnace body is arranged on the top of the furnace body, and the degassing mechanism comprises:

[0009] A second tube body is movably disposed on the top of the furnace cover and extends into the furnace body;

[0010] The base is fixedly arranged on the bottom inner wall of the furnace body, and a shell is fixedly arranged on the top of the base. The inside of the shell is provided with an exhaust assembly arranged in a circular array, and the exhaust assembly includes:

[0011] The guide seat is fixed on the bottom inner wall of the shell and extends to the bottom of the shell. An air guide groove is opened at the bottom of the guide seat. A plug is sleeved on the inner wall of the air guide groove. A movable plate is fixed on the side wall of the plug. The side of the movable plate away from the plug is fixedly connected to the outer wall of one end of the second tube body located in the furnace body to drive the plug to move along the inner wall of the air guide groove.

[0012] Furthermore, the exhaust assembly further comprises:

[0013] The first conduit is fixedly arranged on the outer wall of the guide seat and communicated with the air guide groove. The first conduit is located at the bottom of the movable plate. The side wall of the guide seat is provided with a movable through groove for sleeve mounting the movable plate. When the plug moves to the uppermost end in the air guide groove, the first conduit transports nitrogen into the air guide groove. When the plug moves to the lowermost end of the air guide groove, the plug blocks the first conduit, and the bottom of the plug is level with the bottom of the guide seat or extends to the bottom of the guide seat.

[0014] The first sealing ring is fixedly sleeved at the lower end of the side wall of the plug, and the side wall of the plug and the top fixed sleeve of the first sealing ring are provided with a second sealing ring and a third sealing ring, and the distance between the second sealing ring and the third sealing ring is greater than the diameter of the first conduit.

[0015] Furthermore, the degassing mechanism further comprises:

[0016] An air guide box is fixedly arranged on the bottom inner wall of the shell and is communicated with the first conduits arranged in a circular array. A space for the movable plate to move vertically is reserved between the top of the air guide box and the bottom of the first tube body. A second conduit extending to the top of the furnace cover is fixedly arranged on the top of the inner wall of the air guide box, and the second conduit is sleeved in the second tube body.

[0017] A fourth sealing ring is fixedly sleeved on the inner side of the top of the shell and is used to seal between the outer wall of the second tube body and the top of the shell;

[0018] The electric push rod is fixed on the top of the furnace cover. The telescopic shaft of the electric push rod is fixed with a first connecting piece. The first connecting piece is fixedly connected to the outer wall of one end of the second tube body located on the top of the furnace cover.

[0019] Further, the sewage discharge mechanism comprises:

[0020] A sewage discharge channel is provided on the outer wall of the furnace body so that impurities generated during the aluminum alloy smelting process can be discharged out of the furnace body through the sewage discharge channel;

[0021] The frame is fixedly arranged on the outer wall of the furnace body, and first slide grooves are provided on both sides of the inner side of the frame body, and a limited slot is provided on the inner wall of the first slide groove, and a first slider is placed inside the first slide groove, and a baffle is fixedly arranged on the side where the first sliders are close to each other, and the inner side of the baffle is in contact with the outer wall of the furnace body to block the sewage discharge slot, and both sides of the baffle are located on the outside of the sewage discharge slot, and a connecting plate is fixedly arranged on the side where the first sliders are far away from each other, and the connecting plate is designed in a bent shape, and a limiting component for adjusting the position of the baffle is provided on the side where the connecting plates are far away from each other, and the side wall of the connecting plate is sleeved in the limited slot, and a first slot for sleeved baffle is provided on the inner bottom of the frame body;

[0022] The guide plate is fixedly arranged at the upper end of the outer side of the baffle plate and has an arc-shaped design;

[0023] The sealing strip is fixedly arranged on a side of the baffle plate close to the furnace body and is located on both sides of the sewage discharge groove to seal between the baffle plate and the furnace body.

[0024] Furthermore, the limiting component includes:

[0025] A limiting rod is sleeved on a side wall of the connecting plate away from the first sliding block;

[0026] The limit seat is fixed on the outer wall of the furnace body and is respectively located at the two ends of the limit rod. A second slide groove is opened on the side where the limit seats are close to each other. The second slide groove is designed in an arc shape. A second slider is placed inside the second slide groove. The side where the second slider is close to each other is respectively fixedly connected to the two ends of the limit rod. A first spring is placed inside the second slide groove to elastically support the first slider, so that the limit rod has a tendency to move away from the baffle.

[0027] Furthermore, the limiting component also includes:

[0028] The first electromagnet is sleeved on the side wall of the limit rod and fixed on the top of the limit seat located below;

[0029] The second electromagnet is fixed at the bottom of the connecting plate and sleeved on the side wall of the limit rod, and the side where the second electromagnet and the first electromagnet are close to each other are the same poles. The second electromagnet and the first electromagnet are both annular in design, and a rubber telescopic tube is fixed on the side where the connecting plate and the lower limit seat are close to each other, and the inner wall of the rubber telescopic tube is sleeved on the outside of the first electromagnet and the second electromagnet, and a second spring is sleeved on the side wall of the limit rod and located on the top of the connecting plate.

[0030] Further, the cleaning mechanism comprises:

[0031] The first tube body is sleeved on the top of the furnace cover and extends into the furnace body. The upper end of the inner wall of the first tube body is provided with a third slide groove arranged in a circular array. The third slide groove is provided inside each of the third slide grooves. The third slide groove is fixedly connected to the outer wall of the second tube body. A servo motor is fixedly provided on the top of the furnace cover. The output shaft of the servo motor is fixedly provided with a rotating shaft rotatably connected to the furnace cover through a coupling. A gear is fixedly provided on the side wall of the rotating shaft. The outer wall of the first tube body is provided with tooth grooves meshing with the gear and arranged vertically to drive the first tube body to move.

[0032] The second connecting piece is fixedly arranged on the outer wall of one end of the first tube body located in the furnace body. A mounting ring is fixedly arranged on the bottom of the second connecting piece. A ring-shaped array of nozzles and breaking components are arranged at the bottom of the mounting ring and outside the sewage discharge groove. The nozzles are all inclined and face the sewage discharge groove.

[0033] Furthermore, the cleaning mechanism also includes:

[0034] The gas pipe is fixedly arranged on the inner wall of the mounting ring and is designed in a ring shape. The exhaust end of the gas pipe is connected to the air inlet end of the nozzle. The air inlet end of the gas pipe is fixedly provided with a third conduit. The air inlet end of the third conduit is fixedly provided with a fourth conduit. The fourth conduit extends between the second tube body and the first tube body to the top of the furnace cover.

[0035] The fifth sealing ring is fixedly sleeved on the inner wall of the first tube body and is located at the bottom of the mounting ring, and is used for sealing the outer wall of the second tube body and the inner wall of the first tube body.

[0036] Further, the breaking component includes:

[0037] A hinged frame is fixedly arranged at the bottom of the mounting ring, a fixing rod is fixedly arranged on the inner side of the hinged frame, a sleeve is sleeved on the side wall of the fixing rod, a spring is arranged between the sleeve and the fixing rod, and two sides of the spring are respectively fixedly connected to the inner wall of the sleeve and the side wall of the fixing rod, two ends of the sleeve are respectively rotatably connected to the inner sides of the two sides of the hinged frame, and a roller is fixedly arranged on the bottom of the outer wall of the sleeve;

[0038] The abutment plate is fixedly sleeved on the middle end of the outer wall of the sleeve, and the side of the abutment plate away from the sleeve is in contact with the side wall of the roller. A clamping plate is fixedly arranged on the inner top of the hinged frame, and the clamping plate cooperates with the bottom plate to limit the rotation angle of the roller.

[0039] The present invention also provides a method for using the aluminum alloy vacuum static degassing smelting device, using the aluminum alloy vacuum static degassing smelting device, the method comprises the following steps:

[0040] S1: placing the aluminum alloy to be melted in the furnace body, and heating the aluminum alloy in the furnace body to melt the aluminum alloy to generate aluminum liquid, thereby melting the aluminum alloy;

[0041] S2: During the smelting process, nitrogen is transported into the aluminum alloy through the degassing mechanism to discharge the impurities in the aluminum liquid, and the impurities on the surface of the aluminum liquid are discharged out of the furnace body through the cooperation of the cleaning mechanism and the sewage discharge mechanism.

[0042] The present invention provides an aluminum alloy vacuum static degassing smelting device and method. Compared with the prior art, it has the following beneficial effects:

[0043] 1. The present invention prevents the aluminum liquid from accumulating at the nitrogen outlet while conveying nitrogen into the aluminum liquid through the degassing mechanism, so as to facilitate the discharge of impurities such as hydrogen from the aluminum liquid while avoiding affecting the next smelting use. In addition, the cleaning mechanism and the sewage discharge mechanism cooperate to facilitate the cleaning of impurities such as aluminum slag attached to the aluminum liquid surface according to the height of the aluminum liquid surface.

[0044] 2. The present invention drives the plug to move vertically through the second tube body of the degassing mechanism to control the delivery and interruption of nitrogen. Compared with the traditional method of controlling the circulation of nitrogen only by the elastic support of the spring, the aluminum liquid is prevented from entering the nitrogen circulation channel, thereby avoiding affecting the smelting and use of the aluminum alloy. It has better stability and is convenient for long-term use.

[0045] 3. The present invention uses the first sealing ring, the second sealing ring and the third sealing ring of the degassing mechanism to seal the air guide groove and the plug when the plug is located at different positions. When the plug moves downward, aluminum liquid is prevented from entering the air guide groove and nitrogen is prevented from leaking out. The second sealing ring can strengthen the seal between the plug and the air guide groove to prevent aluminum liquid from entering the air guide groove. When the plug moves upward, nitrogen is prevented from flowing upward and aluminum liquid is prevented from entering the movable through groove and then entering the shell, which is convenient for practical use.

[0046] 4. The present invention uses the sewage discharge slot of the sewage discharge mechanism to facilitate the cleaning mechanism to blow out impurities such as aluminum slag on the surface of the aluminum liquid through the sewage discharge slot to discharge the aluminum slag and other impurities outside the furnace body, and adjust the height of the baffle plate through the limit assembly and the height of the nozzle through the servo motor, so as to clean the aluminum slag and other impurities on the surface of the aluminum liquid in real time according to the height of the aluminum liquid.

[0047] 5. The present invention uses a limiting component to make the connecting plate tend to approach the position of the furnace body on the opposite side of the baffle, so that the baffle fits the furnace body more closely, avoiding the situation of poor sealing caused by gaps between structures such as the first slide groove and the first slider during long-term use of the baffle, and cooperates with the sealing strip to improve the sealing effect between the baffle and the furnace body, avoiding leakage of aluminum liquid without affecting the movement of the baffle.

[0048] 6. The present invention enables the nozzle to be located at a suitable position on the top of the aluminum liquid surface, and the roller to be located below the aluminum liquid surface, thereby breaking thin films such as aluminum film, so that the gas can blow away impurities on the aluminum liquid surface, and the roller can rotate while moving vertically, thereby further improving the effect of breaking the aluminum film on the aluminum liquid surface, and facilitating the subsequent cleaning of impurities such as aluminum slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic diagram of the overall structure of the vacuum static degassing smelting device applicable to aluminum alloys of the present invention;

[0050] Figure 2 It is a schematic diagram of the side structure of the furnace body of the present invention;

[0051] Figure 3 It is a schematic diagram of the cross-sectional structure of the furnace body and the furnace cover of the present invention;

[0052] Figure 4 It is a schematic diagram of the structure of the degassing mechanism and the cleaning mechanism of the present invention;

[0053] Figure 5 It is a schematic cross-sectional structural diagram of the first tube body, the second tube body and the shell of the present invention;

[0054] Figure 6 For the present invention Figure 5 A is a schematic diagram of the enlarged structure of the middle part;

[0055] Figure 7 For the present invention Figure 5 A schematic diagram of the enlarged structure of B;

[0056] Figure 8 This is a schematic diagram of the explosion structure of the mounting ring of the present invention;

[0057] Fig. 9 It is a schematic diagram of the mounting ring, breaking assembly and nozzle structure of the present invention;

[0058] Fig.10 It is a schematic diagram of the structure of the breaking component of the present invention;

[0059] Fig.11 For the present invention Figure 5 Schematic diagram of the enlarged structure of C in the middle;

[0060] Fig.12 It is a schematic diagram of the cross-sectional structure of the shell of the present invention;

[0061] Fig.13 It is a schematic diagram of the exhaust assembly structure of the present invention;

[0062] Fig.14 It is a schematic diagram of the furnace body and the sewage discharge mechanism structure of the present invention;

[0063] Fig.15 It is a schematic diagram of the structure of the sewage discharge mechanism of the present invention;

[0064] Fig.16 It is a schematic diagram of the structure of the limit assembly of the present invention;

[0065] Fig.17 It is a schematic diagram of the cross-sectional structure of the frame of the present invention.

[0066] The reference numerals involved in the above drawings are: 1. furnace body; 2. furnace cover; 3. cleaning mechanism; 4. degassing mechanism; 5. sewage discharge mechanism;

[0067] 31. first tube body; 32. servo motor; 33. mounting ring; 34. fourth conduit; 35. third slide groove; 36. second connecting piece; 37. gas pipe; 38. third conduit; 39. breaking assembly; 3901. nozzle; 3902. fifth sealing ring;

[0068] 391, fixed rod; 392, hinged frame; 393, spring; 394, sleeve; 395, clamping plate; 396, stopper plate; 397, roller;

[0069] 41. electric push rod; 42. first connecting member; 43. second tube body; 44. housing; 45. second conduit; 46. fourth sealing ring; 48. base; 49. air guide box; 491. exhaust assembly;

[0070] 4911, guide seat; 4912, movable plate; 4913, first conduit; 4914, air guide groove; 4915, first sealing ring; 4916, second sealing ring; 4917, third sealing ring; 4918, plug; 4919, movable through groove;

[0071] 51. sewage discharge channel; 52. frame; 53. limit assembly; 54. limit channel; 55. baffle; 56. guide plate; 57. first slide channel;

[0072] 531, limit seat; 532, first electromagnet; 533, second slide slot; 534, rubber telescopic tube; 535, limit rod; 536, second electromagnet. DETAILED DESCRIPTION

[0073] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0074] Example 1: Please refer to Figure 1 , Figure 2 and Figure 3 , an aluminum alloy vacuum static degassing smelting device, comprising a furnace body 1 for smelting aluminum alloy and a furnace cover 2 fixedly arranged on the top of the furnace body 1, the furnace body 1 is used to store the aluminum alloy to be smelted, and heat the aluminum alloy to melt it, so as to melt and reshape the aluminum alloy, the upper end and the lower end of the outer wall of the furnace body 1 are respectively provided with a feeding pipe and a discharging pipe, which are respectively used to transport aluminum alloy materials and the like into the furnace body 1 and discharge aluminum liquid, respectively. The above are all prior arts and are not described in detail here, and also include a cleaning mechanism 3 arranged on the top of the furnace cover 2 and extending into the furnace body 1 and a sewage discharge mechanism 5 arranged on the outer wall of the furnace body 1, through which the cleaning mechanism 3 and the sewage discharge mechanism 5 cooperate to clean impurities generated during the aluminum alloy smelting process, and a degassing mechanism 4 for filling nitrogen into the furnace body 1 is arranged on the top of the furnace body 1;

[0075] See also Figure 4 , Figure 5 , Figure 6 , Fig.11 , Fig.12 and Fig.13 , the degassing mechanism 4 comprises:

[0076] The second tube body 43 is movably disposed on the top of the furnace cover 2 and extends into the furnace body 1;

[0077] The base 48 is fixedly arranged on the bottom inner wall of the furnace body 1. The top of the base 48 is fixedly provided with a shell 44. The inside of the shell 44 is provided with an exhaust assembly 491 arranged in a circular array. The exhaust assembly 491 includes:

[0078] The guide seat 4911 is fixed on the bottom inner wall of the shell 44 and extends to the bottom of the shell 44. An air guide groove 4914 is opened at the bottom of the guide seat 4911. The inner wall of the air guide groove 4914 is sleeved with a plug 4918. A movable plate 4912 is fixedly provided on the side wall of the plug 4918. The side of the movable plate 4912 away from the plug 4918 is fixedly connected to the outer wall of one end of the second tube 43 located in the furnace body 1 to drive the plug 4918 to move along the inner wall of the air guide groove 4914.

[0079] The exhaust assembly 491 also includes:

[0080] The first conduit 4913 is fixedly arranged on the outer wall of the guide seat 4911 and communicated with the air guide groove 4914. The first conduit 4913 is located at the bottom of the movable plate 4912. The side wall of the guide seat 4911 is provided with a movable through groove 4919 for sleeve mounting the movable plate 4912. When the plug 4918 moves to the uppermost end in the air guide groove 4914, the first conduit 4913 transports nitrogen into the air guide groove 4914. When the plug 4918 moves to the lowermost end of the air guide groove 4914, the plug 4918 blocks the first conduit 4913, and the bottom of the plug 4918 is level with the bottom of the guide seat 4911 or extends to the bottom of the guide seat 4911.

[0081] The first sealing ring 4915 is fixedly sleeved on the lower end of the side wall of the plug 4918, and the side wall of the plug 4918 and the top of the first sealing ring 4915 are fixedly sleeved with a second sealing ring 4916 and a third sealing ring 4917, and the distance between the second sealing ring 4916 and the third sealing ring 4917 is greater than the diameter of the first conduit 4913.

[0082] The degassing mechanism 4 also includes:

[0083] The air guide box 49 is fixedly arranged on the bottom inner wall of the shell 44 and communicated with the first conduits 4913 arranged in a circular array. A space for the movable plate 4912 to move vertically is reserved between the top of the air guide box 49 and the bottom of the first tube body 31. A second conduit 45 extending to the top of the furnace cover 2 is fixedly arranged on the top of the inner wall of the air guide box 49, and the second conduit 45 is sleeved in the second tube body 43.

[0084] A fourth sealing ring 46 is fixedly sleeved on the inner side of the top of the housing 44 and is used to seal between the outer wall of the second tube 43 and the top of the housing 44;

[0085] The electric push rod 41 is fixedly arranged on the top of the furnace cover 2 . The telescopic shaft of the electric push rod 41 is fixedly provided with a first connecting member 42 . The first connecting member 42 is fixedly connected to the outer wall of one end of the second tube body 43 located on the top of the furnace cover 2 .

[0086] In the specific implementation, the electric push rod 41 is started, and the telescopic shaft of the electric push rod 41 drives the second tube body 43 to move vertically along the inner wall of the first tube body 31. When the second tube body 43 moves upward, it drives the moving plate 4912 to move along the moving through groove 4919, and the moving plate 4912 drives the plug 4918 to move along the inner wall of the air guide groove 4914, so that the plug 4918 is located at the bottom of the first conduit 4913. At this time, nitrogen is transported to the second conduit 45 through the external nitrogen pipeline, and the nitrogen is discharged into the air guide groove 4914 through the second conduit 45, the air guide box 49 and the first conduit 4913, and is discharged into the aluminum liquid in the furnace body 1 through the air guide groove 4914, so that hydrogen and the like in the aluminum liquid are discharged to improve the purity of the aluminum alloy smelting. When the second tube body 43 moves downward, it drives the plug 4918 and the like to move downward, so as to block the first conduit 4913, thereby stopping the transportation of nitrogen.

[0087] By setting the base 48, a gap is left between the bottom of the shell 44 and the bottom inner wall of the furnace body 1, so that the nitrogen can be discharged downward through the guide seat 4911 and the gas guide groove 4914. When the nitrogen delivery is stopped, the plug 4918 is moved downward so that the bottom of the plug 4918 is level with or located at the bottom of the guide seat 4911, thereby blocking the gas guide groove 4914. While not affecting the discharge of nitrogen, it is avoided that the aluminum liquid accumulates at the nitrogen discharge port when the nitrogen is discharged upward in the traditional way. Since the aluminum liquid will solidify into aluminum blocks after the temperature is lowered, it is avoided to affect the next use. Although the accumulated aluminum blocks are melted in the next smelting, the aluminum blocks accumulated at the nitrogen discharge are difficult to melt quickly, which affects the actual smelting use.

[0088] When the plug 4918 moves downward, the first sealing ring 4915 is tightly attached to the lower end of the inner wall of the guide seat 4911, thereby sealing the plug 4918 and the air guide groove 4914 to prevent molten aluminum from entering the air guide groove 4914, which is convenient for next use. At this time, the second sealing ring 4916 and the third sealing ring 4917 are respectively located at the top and bottom of the first conduit 4913, and a gap is left between the bottom inner wall of the movable through groove 4919 and the top of the first conduit 4913, so that the bottom and top of the first conduit 4913 can be sealed by the second sealing ring 4916 and the third sealing ring 4917 respectively to prevent nitrogen from leaking out, and the second sealing ring 4916 can strengthen the seal between the plug 4918 and the air guide groove 4914 to prevent molten aluminum from entering the air guide groove 4914;

[0089] When the plug 4918 moves upward, the first sealing ring 4915 seals the plug 4918 and the air guide groove 4914 from the top of the first conduit 4913, preventing nitrogen from flowing upward and also preventing aluminum liquid from entering the moving groove 4919 and then entering the housing 44, which is convenient for practical use;

[0090] The plurality of exhaust components 491 arranged in a circular array are used to improve the contact degree between nitrogen and molten aluminum, thereby improving the efficiency of removing impurities such as hydrogen, and the plurality of movable plates 4912 are synchronously driven to rise and fall through the second tube body 43, so as to facilitate the actual control of the circulation of nitrogen. Compared with the traditional method of controlling the circulation of nitrogen only by elastic support of springs, the stability is better, and the molten aluminum is prevented from entering the nitrogen circulation channel, thereby avoiding affecting the smelting and use of aluminum alloy, and it is convenient for long-term use.

[0091] Example 2: Please refer to Fig.14 , Fig.15 , Fig.16 and Fig.17 The technical solution of this embodiment is different from that of the first embodiment in that the sewage discharge mechanism 5 includes:

[0092] A sewage discharge groove 51 is provided on the outer wall of the furnace body 1 so that impurities generated during the aluminum alloy smelting process can be discharged to the outside of the furnace body 1 through the sewage discharge groove 51;

[0093] The frame 52 is fixedly arranged on the outer wall of the furnace body 1, and first slide grooves 57 are provided on both sides of the inner side of the frame 52, and a limited slot 54 is provided on the inner wall of the first slide groove 57. A first slider is placed inside the first slide groove 57, and a baffle 55 is fixedly arranged on the side where the first sliders are close to each other. The inner side of the baffle 55 is in contact with the outer wall of the furnace body 1 to block the sewage discharge slot 51, and both sides of the baffle 55 are located on the outer side of the sewage discharge slot 51, and a connecting plate is fixedly arranged on the side where the first sliders are far away from each other. The connecting plate is designed in a bent shape, and a limiting component 53 for adjusting the position of the baffle 55 is provided on the side where the connecting plates are far away from each other. The side wall of the connecting plate is sleeved in the limited slot 54, and a first slot for sleeved the baffle 55 is provided on the inner bottom of the frame 52;

[0094] The guide plate 56 is fixedly arranged on the upper end of the outer side of the baffle plate 55 and is designed in an arc shape;

[0095] The sealing strip is fixedly disposed on a side of the baffle plate 55 close to the furnace body 1 and is located on both sides of the sewage discharge groove 51 to seal between the baffle plate 55 and the furnace body 1 .

[0096] In specific implementation, by opening a sewage discharge groove 51 on the outer wall of the furnace body 1, it is convenient for the cleaning mechanism 3 to blow out impurities such as aluminum slag on the surface of the aluminum liquid through the sewage discharge groove 51, so as to discharge the impurities such as aluminum slag to the outside of the furnace body 1. By setting the guide plate 56, it is convenient to discharge impurities such as aluminum slag and reduce their attachment to the outer side of the baffle 55, which is convenient for long-term use. The baffle 55 and the furnace body 1 are sealed by a sealing strip to avoid leakage of aluminum liquid and facilitate the movement of the baffle 55.

[0097] The limiting assembly 53 includes:

[0098] The limiting rod 535 is sleeved on a side wall of the connecting plate away from the first sliding block;

[0099] The limiting seat 531 is fixedly arranged on the outer wall of the furnace body 1 and is respectively located at the two ends of the limiting rod 535. A second slide groove 533 is provided on the side where the limiting seat 531 is close to each other. The second slide groove 533 is designed in an arc shape. A second slider is placed inside the second slide groove 533. The side where the second slider is close to each other is respectively fixedly connected to the two ends of the limiting rod 535. A first spring is placed inside the second slide groove 533 to elastically support the first slider, so that the limiting rod 535 has a tendency to move away from the baffle 55.

[0100] The limiting component 53 also includes:

[0101] The first electromagnet 532 is sleeved on the side wall of the limiting rod 535 and fixed on the top of the limiting seat 531 located below;

[0102] The second electromagnet 536 is fixed at the bottom of the connecting plate and is sleeved on the side wall of the limiting rod 535, and the side where the second electromagnet 536 and the first electromagnet 532 are close to each other are the same poles. The second electromagnet 536 and the first electromagnet 532 are both annular in design, and a rubber telescopic tube 534 is fixed on the side where the connecting plate and the lower limiting seat 531 are close to each other, and the inner wall of the rubber telescopic tube 534 is sleeved on the outside of the first electromagnet 532 and the second electromagnet 536, and a second spring is sleeved on the side wall of the limiting rod 535 and located on the top of the connecting plate.

[0103] In specific implementation, since the liquid level of the aluminum liquid in the furnace body 1 is constantly increasing during the aluminum alloy smelting process, in order to facilitate the real-time cleaning of impurities such as aluminum slag on the liquid level of the aluminum liquid, the first electromagnet 532 and the second electromagnet 536 are started, and the repulsive force generated by the first electromagnet 532 and the second electromagnet 536 drives the second electromagnet 536, the connecting plate, the first slider and the baffle 55 to move vertically, so that the connecting plate overcomes the elastic force of the second spring and moves upward, thereby adjusting the height of the baffle 55, so that the aluminum slag and other impurities on the liquid level of the aluminum liquid can be cleaned in real time according to the height of the aluminum liquid;

[0104] The second slider moves in the second slide groove 533, and the first spring elastically supports the second slider and the limiting rod 535. Since the second slide groove 533 is designed in an arc shape, the connecting plate is close to the position of the furnace body 1 on the opposite side of the baffle 55, so that the baffle 55 fits the furnace body 1 more closely, and avoids the baffle 55 from being poorly sealed due to the gap between the first slide groove 57 and the first slider and other structures during long-term use. The baffle 55 cooperates with the sealing strip to improve the sealing effect between the baffle 55 and the furnace body 1, and avoids the leakage of aluminum liquid without affecting the movement of the baffle 55. By making the curvature of the second slide groove 533 consistent with the curvature of the furnace body 1, it is convenient to tighten the two sides of the baffle 55 through the limiting rod 535, so that the baffle 55 and the furnace body 1 are in close contact.

[0105] The rubber expansion tube 534 is provided to protect the first electromagnet 532 and the second electromagnet 536, so as to facilitate practical use.

[0106] See also Figure 7 , Figure 8 , Fig. 9 and Fig.10 , the cleaning mechanism 3 includes:

[0107] The first tube body 31 is sleeved on the top of the furnace cover 2 and extends into the furnace body 1. The upper end of the inner wall of the first tube body 31 is provided with a third slide groove 35 arranged in a circular array. The third slide groove 35 is placed inside each third slide groove. The third slide groove is fixedly connected to the outer wall of the second tube body 43. A servo motor 32 is fixedly provided on the top of the furnace cover 2. The output shaft of the servo motor 32 is fixedly provided with a rotating shaft rotatably connected to the furnace cover 2 through a coupling. A gear is fixedly provided on the side wall of the rotating shaft. The outer wall of the first tube body 31 is provided with a tooth groove meshing with the gear and arranged vertically to drive the first tube body 31 to move.

[0108] The second connecting member 36 is fixedly arranged on the outer wall of one end of the first tube body 31 located in the furnace body 1. A mounting ring 33 is fixedly arranged at the bottom of the second connecting member 36. A ring array of nozzles 3901 and a breaking assembly 39 are arranged at the bottom of the mounting ring 33 and located outside the sewage discharge groove 51. The nozzles 3901 are all inclined and face the sewage discharge groove 51.

[0109] The cleaning mechanism 3 also includes:

[0110] The gas pipe 37 is fixedly arranged on the inner wall of the mounting ring 33 and is designed in a ring shape. The exhaust end of the gas pipe 37 is connected to the intake end of the nozzle 3901. The intake end of the gas pipe 37 is fixedly provided with a third conduit 38. The intake end of the third conduit 38 is fixedly provided with a fourth conduit 34. The fourth conduit 34 extends between the second tube body 43 and the first tube body 31 to the top of the furnace cover 2.

[0111] The fifth sealing ring 3902 is fixedly sleeved on the inner wall of the first tube body 31 and located at the bottom of the mounting ring 33 , and is used to seal the outer wall of the second tube body 43 and the inner wall of the first tube body 31 .

[0112] In a specific implementation, a gas such as nitrogen is input into the fourth conduit 34, and the gas enters the nozzle 3901 through the fourth conduit 34, the third conduit 38 and the gas delivery pipe 37, and is ejected through the nozzle group. Since the nozzle 3901 is designed to be inclined and faces the drainage groove 51, impurities such as aluminum slag accumulated on the surface of the aluminum liquid are floated to the drainage groove 51, so that the impurities such as aluminum slag accumulated on the surface of the aluminum liquid are discharged outside the furnace body 1 along the drainage groove 51;

[0113] The servo motor 32 drives the gear to rotate, and the gear rotates while driving the first tube body 31 to move through the tooth groove, so that the first tube body 31 moves along the outer wall of the second tube body 43, thereby adjusting the height of the nozzle 3901, and cooperating with the sewage discharge mechanism 5 to remove slag from aluminum liquid with different liquid level heights, which is convenient for actual smelting of aluminum alloy;

[0114] By disposing the second tube body 43 in the first tube body 31, it is convenient to drive the shell 44 to move, and it is also convenient to arrange the fourth conduit 34 and the second conduit 45, which is convenient for actual gas transportation. The positions of the first tube body 31 and the second tube body 43 are limited by the third slide groove 35 and the third slider to avoid misalignment of gears and tooth grooves, thereby improving the stability of the vertical movement of the first tube body 31.

[0115] See also Fig.10 , the breaking component 39 includes:

[0116] The hinged frame 392 is fixedly arranged at the bottom of the mounting ring 33. A fixing rod 391 is fixedly arranged on the inner side of the hinged frame 392. A sleeve 394 is sleeved on the side wall of the fixing rod 391. A spring 393 is arranged between the sleeve 394 and the fixing rod 391. The two sides of the spring 393 are respectively fixedly connected to the inner wall of the sleeve 394 and the side wall of the fixing rod 391. The two ends of the sleeve 394 are respectively rotatably connected to the inner sides of the two sides of the hinged frame 392. A roller 397 is fixedly arranged on the bottom of the outer wall of the sleeve 394.

[0117] The support plate 396 is fixedly mounted on the middle end of the outer wall of the sleeve 394, and the side of the support plate 396 away from the sleeve 394 is in contact with the side wall of the roller 397. A clamping plate 395 is fixedly provided on the inner top of the hinged frame 392, and the clamping plate 395 cooperates with the bottom plate to limit the rotation angle of the roller 397.

[0118] In specific implementation, when a large amount of impurities such as aluminum slag accumulate on the surface of the aluminum liquid, it is easy to form aluminum film and other thin films on the surface of the aluminum liquid, which affects the gas from cleaning the impurities on the surface of the aluminum liquid. Therefore, when the nozzle 3901 is located at a suitable position on the top of the aluminum liquid surface, the roller 397 is located below the surface of the aluminum liquid, thereby breaking the aluminum film and other thin films. In addition, since the nozzle 3901 is arranged at the bottom of the mounting ring 33, it is convenient for the gas to blow the impurities on the surface of the aluminum liquid, thereby facilitating the impurities to be discharged to the outside of the furnace body 1 along the sewage discharge groove 51.

[0119] When the height of the nozzle 3901 and the like is adjusted by the second tube body 43, the roller 397 rotates outward under the action of the spring 393, so that the side wall of the roller 397 fits against the inner wall of the furnace body 1, so that the roller 397 rotates while moving vertically, further improving the effect of breaking the aluminum film on the surface of the aluminum liquid, facilitating the subsequent cleaning of impurities such as aluminum slag, and by the cooperation of the abutment plate 396 and the clamping plate 395, the roller 397 is prevented from rotating excessively, thereby avoiding the situation in which the roller 397 is flipped to the outside of the furnace body 1 when the roller 397 and the like enter the furnace body 1, making it inconvenient for the roller 397 to enter the furnace body 1, and the side wall of the roller 397 is scraped by the abutment plate 396 to avoid a large amount of impurities accumulating on the side wall of the roller 397 to avoid affecting the rotation of the roller 397.

[0120] The embodiment of the present invention further provides a method for using an aluminum alloy vacuum static degassing melting device, using an aluminum alloy vacuum static degassing melting device, the method comprising the following steps:

[0121] S1: placing the aluminum alloy to be smelted in the furnace body 1 through the feed pipe at the upper end of the outer wall of the furnace body 1, and heating the aluminum alloy in the furnace body 1 to melt the aluminum alloy to produce aluminum liquid, thereby smelting the aluminum alloy, and the smelted aluminum liquid is discharged through the discharge pipe at the lower end of the outer wall of the furnace body 1;

[0122] S2: During the smelting process, nitrogen is transported into the aluminum alloy through the degassing mechanism 4 to discharge impurities such as hydrogen in the aluminum liquid, thereby improving the purity of the aluminum alloy, and the impurities on the surface of the aluminum liquid are discharged to the outside of the furnace body 1 through the cooperation of the cleaning mechanism 3 and the sewage discharge mechanism 5, so as to avoid a large amount of impurities such as aluminum slag adhering to the liquid surface of the aluminum liquid, thereby avoiding affecting the discharge of impurities such as hydrogen and subsequent processing and use.

[0123] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0124] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0125] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum static degassing smelting device for aluminum alloy, comprising a furnace body for smelting aluminum alloy and a furnace cover fixed on the top of the furnace body, characterized in that: It also includes a cleaning mechanism arranged on the top of the furnace cover and extending into the furnace body and a sewage discharge mechanism arranged on the outer wall of the furnace body. The cleaning mechanism and the sewage discharge mechanism cooperate to clean the impurities generated during the aluminum alloy smelting process. The top of the furnace body is provided with a degassing mechanism for filling nitrogen into the furnace body. The degassing mechanism includes: A second tube body is movably disposed on the top of the furnace cover and extends into the furnace body; The base is fixedly arranged on the bottom inner wall of the furnace body, and a shell is fixedly arranged on the top of the base. The inside of the shell is provided with an exhaust assembly arranged in a circular array, and the exhaust assembly includes: The guide seat is fixedly arranged on the bottom inner wall of the shell and extends to the bottom of the shell. An air guide groove is provided at the bottom of the guide seat. A plug is sleeved on the inner wall of the air guide groove. A movable plate is fixedly arranged on the side wall of the plug. The side of the movable plate away from the plug is fixedly connected to the outer wall of one end of the second tube body located in the furnace body, so as to drive the plug to move along the inner wall of the air guide groove. The cleaning mechanism comprises: The first tube body is sleeved on the top of the furnace cover and extends into the furnace body. The upper end of the inner wall of the first tube body is provided with a third slide groove arranged in a circular array. The third slide groove is provided inside each of the third slide grooves. The third slide groove is fixedly connected to the outer wall of the second tube body. A servo motor is fixedly provided on the top of the furnace cover. The output shaft of the servo motor is fixedly provided with a rotating shaft rotatably connected to the furnace cover through a coupling. A gear is fixedly provided on the side wall of the rotating shaft. The outer wall of the first tube body is provided with tooth grooves meshing with the gear and arranged vertically to drive the first tube body to move. The second connecting member is fixedly arranged on the outer wall of one end of the first tube body located in the furnace body, and a mounting ring is fixedly arranged on the bottom of the second connecting member. A ring-shaped array of nozzles and a breaking assembly are arranged on the bottom of the mounting ring and outside the sewage discharge groove, and the nozzles are all inclined and face the sewage discharge groove; The breaking component comprises: A hinged frame is fixedly arranged at the bottom of the mounting ring, a fixing rod is fixedly arranged on the inner side of the hinged frame, a sleeve is sleeved on the side wall of the fixing rod, a spring is arranged between the sleeve and the fixing rod, and two sides of the spring are respectively fixedly connected to the inner wall of the sleeve and the side wall of the fixing rod, two ends of the sleeve are respectively rotatably connected to the inner sides of the two sides of the hinged frame, and a roller is fixedly arranged on the bottom of the outer wall of the sleeve; The abutment plate is fixedly sleeved on the middle end of the outer wall of the sleeve, and the side of the abutment plate away from the sleeve is in contact with the side wall of the roller. A clamping plate is fixedly arranged on the inner top of the hinged frame, and the clamping plate cooperates with the bottom plate to limit the rotation angle of the roller.

2. The aluminum alloy vacuum static degassing smelting device according to claim 1, characterized in that: The exhaust assembly also includes: The first conduit is fixedly arranged on the outer wall of the guide seat and communicated with the air guide groove. The first conduit is located at the bottom of the movable plate. The side wall of the guide seat is provided with a movable through groove for sleeve mounting the movable plate. When the plug moves to the uppermost end in the air guide groove, the first conduit transports nitrogen into the air guide groove. When the plug moves to the lowermost end of the air guide groove, the plug blocks the first conduit, and the bottom of the plug is level with the bottom of the guide seat or extends to the bottom of the guide seat. The first sealing ring is fixedly sleeved at the lower end of the side wall of the plug, and the side wall of the plug and the top fixed sleeve of the first sealing ring are provided with a second sealing ring and a third sealing ring, and the distance between the second sealing ring and the third sealing ring is greater than the diameter of the first conduit.

3. The aluminum alloy vacuum static degassing smelting device according to claim 2, characterized in that: The degassing mechanism also includes: An air guide box is fixedly arranged on the bottom inner wall of the shell and is communicated with the first conduits arranged in a circular array. A space for the movable plate to move vertically is reserved between the top of the air guide box and the bottom of the first tube body. A second conduit extending to the top of the furnace cover is fixedly arranged on the top of the inner wall of the air guide box, and the second conduit is sleeved in the second tube body. A fourth sealing ring is fixedly sleeved on the inner side of the top of the shell and is used to seal between the outer wall of the second tube body and the top of the shell; The electric push rod is fixed on the top of the furnace cover. The telescopic shaft of the electric push rod is fixed with a first connecting piece. The first connecting piece is fixedly connected to the outer wall of one end of the second tube body located on the top of the furnace cover.

4. The aluminum alloy vacuum static degassing melting device according to claim 1, characterized in that: The sewage discharge mechanism comprises: A sewage discharge channel is provided on the outer wall of the furnace body so that impurities generated during the aluminum alloy smelting process can be discharged out of the furnace body through the sewage discharge channel; The frame is fixedly arranged on the outer wall of the furnace body, and first slide grooves are provided on both sides of the inner side of the frame body, and a limited slot is provided on the inner wall of the first slide groove, and a first slider is placed inside the first slide groove, and a baffle is fixedly arranged on the side where the first sliders are close to each other, and the inner side of the baffle is in contact with the outer wall of the furnace body to block the sewage discharge slot, and both sides of the baffle are located on the outside of the sewage discharge slot, and a connecting plate is fixedly arranged on the side where the first sliders are far away from each other, and the connecting plate is designed in a bent shape, and a limiting component for adjusting the position of the baffle is provided on the side where the connecting plates are far away from each other, and the side wall of the connecting plate is sleeved in the limited slot, and a first slot for sleeved baffle is provided on the inner bottom of the frame body; The guide plate is fixedly arranged at the upper end of the outer side of the baffle plate and has an arc-shaped design; The sealing strip is fixedly arranged on a side of the baffle plate close to the furnace body and is located on both sides of the sewage discharge groove to seal between the baffle plate and the furnace body.

5. The aluminum alloy vacuum static degassing smelting device according to claim 4, characterized in that: The limiting component comprises: A limiting rod is sleeved on a side wall of the connecting plate away from the first sliding block; The limit seat is fixed on the outer wall of the furnace body and is respectively located at the two ends of the limit rod. A second slide groove is opened on the side where the limit seats are close to each other. The second slide groove is designed in an arc shape. A second slider is placed inside the second slide groove. The side where the second slider is close to each other is respectively fixedly connected to the two ends of the limit rod. A first spring is placed inside the second slide groove to elastically support the first slider, so that the limit rod has a tendency to move away from the baffle.

6. The aluminum alloy vacuum static degassing smelting device according to claim 5, characterized in that: The limiter assembly also includes: The first electromagnet is sleeved on the side wall of the limit rod and fixed on the top of the limit seat located below; The second electromagnet is fixed at the bottom of the connecting plate and sleeved on the side wall of the limit rod, and the side where the second electromagnet and the first electromagnet are close to each other are the same poles. The second electromagnet and the first electromagnet are both annular in design, and a rubber telescopic tube is fixed on the side where the connecting plate and the lower limit seat are close to each other, and the inner wall of the rubber telescopic tube is sleeved on the outside of the first electromagnet and the second electromagnet, and a second spring is sleeved on the side wall of the limit rod and located on the top of the connecting plate.

7. The aluminum alloy vacuum static degassing melting device according to claim 1, characterized in that: The cleaning mechanism also includes: The gas pipe is fixedly arranged on the inner wall of the mounting ring and is designed in a ring shape. The exhaust end of the gas pipe is connected to the air inlet end of the nozzle. The air inlet end of the gas pipe is fixedly provided with a third conduit. The air inlet end of the third conduit is fixedly provided with a fourth conduit. The fourth conduit extends between the second tube body and the first tube body to the top of the furnace cover. The fifth sealing ring is fixedly sleeved on the inner wall of the first tube body and is located at the bottom of the mounting ring, and is used for sealing the outer wall of the second tube body and the inner wall of the first tube body.

8. A method for using an aluminum alloy vacuum static degassing smelting device, characterized in that: Using the aluminum alloy vacuum static degassing smelting device according to any one of claims 1 to 7, the method comprises the following steps: S1: placing the aluminum alloy to be melted in the furnace body, and heating the aluminum alloy in the furnace body to melt the aluminum alloy to generate aluminum liquid, thereby melting the aluminum alloy; S2: During the smelting process, nitrogen is transported into the aluminum alloy through the degassing mechanism to discharge the impurities in the aluminum liquid, and the impurities on the surface of the aluminum liquid are discharged out of the furnace body through the cooperation of the cleaning mechanism and the sewage discharge mechanism.

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