Alloy casting melting device

Abstract

The utility model relates to alloy foundry melt technology field especially relates to a kind of alloy foundry melt device, including smelting furnace, and smelting furnace is rotationally connected with stirring shaft, and a plurality of groups of stirring rod are vertically equidistantly installed on stirring shaft, and air inlet passage is opened in stirring shaft, and gas guide hole that is communicated with air inlet passage is opened in stirring shaft, and exhaust passage that is communicated with air inlet passage is opened in stirring rod, and exhaust hole that is communicated with exhaust passage is opened in stirring rod.The utility model is rotated by stirring shaft to drive stirring rod, and the molten liquid in smelting furnace is stirred and exhausts, in this process, argon is introduced into exhaust passage that is opened in stirring rod by the air inlet passage that is opened in stirring shaft, and argon is introduced into molten liquid interior by the gas guide hole that is opened in air inlet passage and the exhaust hole that is opened in exhaust passage, forms bubble, contact with hydrogen and inclusion in molten liquid, and it is adsorbed and floated and discharged, and the efficiency of hydrogen and inclusion in molten liquid is excluded is improved.

Description

Technical Field

[0001] This utility model relates to the field of alloy casting smelting technology, and in particular to an alloy casting smelting apparatus. Background Technology

[0002] In modern industry, alloy castings are widely used in key industries such as aerospace, automobile manufacturing, and energy equipment due to their excellent comprehensive performance.

[0003] However, during the alloy smelting process, the presence of hydrogen impurities can cause precipitation in the alloy castings during solidification, forming porosity or pinhole defects. These pores not only significantly weaken the mechanical properties of the castings, leading to a substantial decrease in their strength, toughness, and fatigue life, but also affect the density and surface quality of the castings, reducing their airtightness and corrosion resistance, thus seriously impacting the overall quality of the castings.

[0004] Currently, most alloy casting smelting equipment uses traditional stirring and degassing processes, which are difficult to effectively remove hydrogen impurities from the melt. On the one hand, existing stirring methods, such as mechanical paddle stirring and electromagnetic induction stirring, have problems such as uneven stirring and many dead zones, which cannot allow the degassing agent or inert gas to fully contact the melt, resulting in inefficient diffusion and discharge of hydrogen. On the other hand, commonly used top blowing or side ventilation methods for hydrogen removal have limited efficiency due to the short residence time of gas in the melt and the large bubble size. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an alloy casting melting device that solves the technical problems of uneven stirring and numerous dead zones in existing stirring and degassing methods, as well as the limited efficiency of top blowing or side ventilation for hydrogen removal.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an alloy casting melting device, including a melting furnace, a stirring shaft rotatably connected to the melting furnace, multiple sets of stirring rods vertically and equidistantly installed on the stirring shaft, an air inlet channel opened inside the stirring shaft, an air guide hole opened on the stirring shaft communicating with the air inlet channel, an exhaust channel opened on the stirring rod communicating with the air inlet channel, and an exhaust hole opened on the stirring rod communicating with the exhaust channel. The melting furnace is provided with a driving assembly for driving the stirring shaft to rotate, and a discharge assembly is provided on the outside of the melting furnace to drive it to flip and discharge materials.

[0007] A further improvement is that both the intake and exhaust channels are spiral-shaped air passages, and the air guide hole and exhaust hole are oblique hole structures opened along the spiral lines of the intake and exhaust channels, respectively, with the air guide hole having an inclination angle of 30°-45° and the exhaust hole having an inclination angle of 45°-60°.

[0008] A further improvement is that the air guide hole is a slanted hole structure that is narrow on the outside and wide on the inside, and the exhaust hole is a slanted hole structure that is wide on the outside and narrow on the inside.

[0009] A further improvement is that an air chamber is provided at the point where the air inlet channel and the air outlet channel on the stirring shaft are connected.

[0010] A further improvement is that the drive assembly includes a driven bevel gear mounted on the stirring shaft, a driving bevel gear meshing with the driven bevel gear, and a drive motor for driving the driving bevel gear to rotate is mounted on the smelting furnace.

[0011] A further improvement is that the discharge assembly includes support seats symmetrically installed on both sides of the smelting furnace, a bearing seat is installed on the top of the support seat, a tilting shaft is rotatably connected inside the bearing seat, an installation plate connected to the smelting furnace is installed at the inner end of both tilting shafts, an electric lifting rod is installed on the support seat, and a connecting arm with its end sleeved on the tilting shaft is hinged to the free end of the electric lifting rod.

[0012] By means of the above technical solution, this utility model provides an alloy casting melting device, which has at least the following beneficial effects:

[0013] 1. This utility model uses a stirring shaft to drive a stirring rod to rotate, stirring and venting the molten metal in the melting furnace. During this process, argon gas is introduced into the exhaust channel on the stirring rod through the air inlet channel on the stirring shaft, and then introduced into the molten metal through the air guide hole on the air inlet channel and the exhaust hole on the exhaust channel, forming bubbles that come into contact with hydrogen and inclusions in the molten metal, adsorbing and floating them to the surface for discharge, thus improving the efficiency of removing hydrogen and inclusions from the molten metal.

[0014] 2. This utility model guides argon gas to form a spiral airflow through a spiral air intake channel and an exhaust channel, creating a turbulent effect in the air channel, breaking up the argon gas, reducing the size of the discharged bubbles, and thus allowing them to come into more full contact with hydrogen and inclusions in the molten liquid, and adsorbing and floating them out.

[0015] 3. This utility model uses inclined air guide holes and exhaust holes to make the direction of argon gas ejection consistent with the direction of shaft rotation, forming a forward injection, reducing the collision loss between argon gas injection bubbles and molten liquid flow, and the evenly distributed inclined holes form a spiral gas curtain. Compared with the traditional top single-point blowing, the gas curtain coverage area is increased by 3-5 times, ensuring that hydrogen inclusions in each area of ​​the molten liquid can fully contact the bubbles, improving the impurity removal efficiency.

[0016] 4. When the spiral argon gas flows through the narrow outer and wide inner guide hole, the cross-section of the guide hole expands, converting the tangential kinetic energy of the spiral motion into axial pressure energy, thus compensating for the loss along the path of argon gas transmission and injection. When the argon gas flows to the wide outer and narrow inner exhaust hole, the cross-section of the exhaust hole contracts, amplifying the kinetic energy and forming a two-level compensation of "pressure recovery - kinetic energy enhancement", thereby solving the problem of insufficient pressure when the argon gas flows to the bottom stirring rod.

[0017] 5. This utility model breaks the single flow direction of spiral argon gas by using a gas chamber, so that the argon gas forms a radial and axial composite flow when it enters the exhaust channel inside the stirring rod. When the argon gas is ejected through the exhaust hole, it can form a three-dimensional mixing field of "spiral rising bubble flow + circumferential stirring flow" in the molten liquid in conjunction with the rotating stirring shaft. Compared with traditional straight injection, it is easier to cover the entire molten pool and eliminate stirring dead zones. Attached Figure Description

[0018] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is an independent schematic diagram of the stirring shaft and its structure according to this utility model;

[0022] Figure 3 This is a cross-sectional view of the stirring shaft and the stirring shaft of this utility model;

[0023] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 This is a schematic diagram of the independently enlarged structure of the drive component of this utility model;

[0025] Figure 6 This is a partially enlarged structural diagram of the material discharge assembly of this utility model.

[0026] In the diagram: 1. Smelting furnace; 2. Stirring shaft; 3. Stirring rod; 4. Air inlet channel; 5. Air guide hole; 6. Exhaust channel; 7. Exhaust port; 8. Gas chamber;

[0027] 9. Drive assembly; 91. Driven bevel gear; 92. Driving bevel gear; 93. Drive motor;

[0028] 10. Discharge assembly; 101. Support base; 102. Bearing housing; 103. Tilting shaft; 104. Mounting plate; 105. Electric lifting rod; 106. Connecting arm. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Addressing the issues of uneven stirring and numerous dead zones in existing agitation degassing methods, and the limited efficiency of top blowing or side ventilation for hydrogen removal, this embodiment provides an alloy casting melting apparatus. This apparatus can simultaneously introduce argon gas into the molten metal during agitation and degassing, guiding the argon gas to form a three-dimensional swirling field. This reduces the size of the discharged bubbles, allowing for more thorough contact with hydrogen and inclusions in the molten metal, adsorbing and floating them for removal, thus improving the efficiency of hydrogen and inclusion removal from the molten metal. Please refer to... Figures 1-6 The alloy casting smelting apparatus includes a smelting furnace 1, a stirring shaft 2 rotatably connected to the smelting furnace 1, multiple stirring rods 3 vertically and equidistantly mounted on the stirring shaft 2, an air inlet channel 4 inside the stirring shaft 2, an air guide hole 5 communicating with the air inlet channel 4 on the stirring shaft 2, an exhaust channel 6 communicating with the air inlet channel 4 on the stirring rods 3, and an exhaust hole 7 communicating with the exhaust channel 6 on the stirring rods 3. A drive assembly 9 is provided on the smelting furnace 1 to drive the stirring shaft 2 to rotate, and a discharge assembly 10 is provided on the outside of the smelting furnace 1 to drive it to tilt and discharge materials. The stirring shaft 2 rotates, which in turn drives the stirring rod 3 to rotate, stirring and venting the molten liquid in the melting furnace 1. During this process, argon gas is introduced into the exhaust channel 6 on the stirring rod 3 through the air inlet channel 4 on the stirring shaft 2, and then introduced into the molten liquid through the air guide hole 5 on the air inlet channel 4 and the exhaust hole 7 on the exhaust channel 6, forming bubbles. These bubbles come into contact with hydrogen and inclusions in the molten liquid, adsorbing and floating them to the surface for discharge, thus improving the efficiency of removing hydrogen and inclusions from the molten liquid. Finally, the molten liquid after impurity removal is poured out through the discharge assembly 10.

[0031] To enhance the efficiency of removing hydrogen and inclusions from the molten metal, both the inlet channel 4 and the exhaust channel 6 in this device are spiral-shaped gas channels. The guide hole 5 and the exhaust hole 7 are oblique holes opened along the spiral lines of the inlet channel 4 and the exhaust channel 6, respectively. The guide hole 5 has an inclination angle of 30°-45°, and the exhaust hole 7 has an inclination angle of 45°-60°. When argon gas passes through the spiral inlet channel 4 and the exhaust channel 6, it is guided to form a spiral airflow, creating a turbulent effect within the gas channels, thus initially breaking down the argon gas before it is ejected. The process breaks down the bubbles, reducing their size and allowing them to come into more thorough contact with hydrogen and inclusions in the molten metal. This process adsorbs and removes these inclusions by floating them to the surface. The inclined vent holes 5 and vent holes 7 ensure that the direction of the argon gas ejection is aligned with the direction of the shaft rotation, creating a forward injection that reduces the impact loss between the argon gas ejection bubbles and the molten metal flow. Furthermore, the evenly distributed inclined holes form a spiral gas curtain, which increases the gas curtain coverage area by 3-5 times compared to traditional top single-point blowing. This ensures that hydrogen inclusions in all areas of the molten metal can come into full contact with the bubbles, improving the impurity removal efficiency.

[0032] To prevent insufficient gas pressure when the argon gas reaches the bottom stirring rod 3 due to continuous injection during the flow process, the gas guide hole 5 in this device has an oblique hole structure that is narrow on the outside and wide on the inside, and the exhaust hole 7 has an oblique hole structure that is wide on the outside and narrow on the inside. When the spiral argon gas flows through the gas guide hole 5, the cross-section of the gas guide hole 5 expands, converting the tangential kinetic energy of the spiral motion into axial pressure energy, compensating for the loss along the path of argon gas transmission and injection. When the argon gas flows to the exhaust hole 7, the cross-section of the exhaust hole 7 contracts, amplifying the kinetic energy, forming a two-level compensation of "pressure recovery - kinetic energy enhancement", thereby solving the problem of insufficient pressure when the argon gas flows to the bottom stirring rod 3.

[0033] Furthermore, an air chamber 8 is provided at the junction of the air inlet channel 4 and the exhaust channel 6 on the stirring shaft 2. The presence of the air chamber 8 breaks the single flow direction of the spiral argon gas, so that the argon gas forms a radial and axial composite flow when it enters the exhaust channel 6 inside the stirring rod 3. When the argon gas is ejected through the exhaust hole 7, it can form a three-dimensional mixing field of "spiral rising bubble flow + circumferential stirring flow" in the molten liquid in conjunction with the rotating stirring shaft 2. Compared with traditional straight injection, it is easier to cover the entire molten pool and eliminate stirring dead zones.

[0034] Furthermore, the drive assembly 9 includes a driven bevel gear 91 mounted on the stirring shaft 2, a driving bevel gear 92 meshing with the driven bevel gear 91, and a drive motor 93 mounted on the melting furnace 1 to drive the driving bevel gear 92 to rotate. When the drive motor 93 is started, it drives the driving bevel gear 92 to rotate, which in turn drives the driven bevel gear 91 to rotate, thereby driving the stirring rod 3 to rotate to stir and remove impurities from the molten liquid.

[0035] To facilitate material unloading, the device also includes a discharge assembly 10. The discharge assembly 10 includes support seats 101 symmetrically installed on both sides of the smelting furnace 1. A bearing seat 102 is installed on the top of the support seat 101. A tilting shaft 103 is rotatably connected inside the bearing seat 102. An installation plate 104 connected to the smelting furnace 1 is installed at the inner end of each of the two tilting shafts 103. An electric lifting rod 105 is installed on the support seat 101. The free end of the electric lifting rod 105 is hinged to a connecting arm 106 whose end is sleeved on the tilting shaft 103. When the electric lifting rod 105 is activated, the connecting arm 106 is pushed upward, and the pin slides in the groove opened on the connecting arm 106. Thus, the tilting shaft 103 is driven to rotate in the bearing seat 102 through the connecting arm 106, and then the smelting furnace 1 is tilted to unload material through the installation plate 104.

[0036] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An alloy casting smelting apparatus, comprising a smelting furnace (1), characterized in that: The smelting furnace (1) is rotatably connected to a stirring shaft (2), and multiple sets of stirring rods (3) are vertically and equidistantly installed on the stirring shaft (2). An air inlet channel (4) is opened inside the stirring shaft (2), and an air guide hole (5) communicating with the air inlet channel (4) is opened on the stirring shaft (2). An exhaust channel (6) communicating with the air inlet channel (4) is opened on the stirring rod (3), and an exhaust hole (7) communicating with the exhaust channel (6) is opened on the stirring rod (3). The smelting furnace (1) is provided with a driving assembly (9) for driving the stirring shaft (2) to rotate, and a discharge assembly (10) for driving the furnace (1) to flip and discharge materials is provided on the outside of the smelting furnace (1).

2. The alloy casting melting apparatus according to claim 1, characterized in that: The intake channel (4) and exhaust channel (6) are both spiral air passages. The air guide hole (5) and exhaust hole (7) are oblique hole structures opened along the spiral lines of the intake channel (4) and exhaust channel (6), respectively. The inclination angle of the air guide hole (5) is 30°-45°, and the inclination angle of the exhaust hole (7) is 45°-60°.

3. The alloy casting melting apparatus according to claim 1, characterized in that: The air guide hole (5) is a slanted hole structure that is narrow on the outside and wide on the inside, and the exhaust hole (7) is a slanted hole structure that is wide on the outside and narrow on the inside.

4. The alloy casting melting apparatus according to claim 1, characterized in that: An air chamber (8) is provided at the junction of the air inlet channel (4) and the exhaust channel (6) on the stirring shaft (2).

5. The alloy casting melting apparatus according to claim 1, characterized in that: The drive assembly (9) includes a driven bevel gear (91) mounted on the stirring shaft (2), a driving bevel gear (92) meshing with the driven bevel gear (91), and a drive motor (93) for driving the driving bevel gear (92) to rotate is mounted on the smelting furnace (1).

6. The alloy casting melting apparatus according to claim 1, characterized in that: The discharge assembly (10) includes a support base (101) symmetrically installed on both sides of the smelting furnace (1). A bearing seat (102) is installed on the top of the support base (101). A rotating shaft (103) is rotatably connected inside the bearing seat (102). An installation plate (104) connected to the smelting furnace (1) is installed at the inner end of both rotating shafts (103). An electric lifting rod (105) is installed on the support base (101). A connecting arm (106) with its end sleeved on the rotating shaft (103) is hinged to the free end of the electric lifting rod (105).

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