Stirring device of ultra-pure stainless steel smelting furnace

Abstract

The utility model relates to the technical field of stainless steel vacuum smelting, in particular to an ultrapure stainless steel smelting furnace stirring device which comprises a shell, an operation door is movably installed on the outer side of the shell, a top plate is installed at the upper end of the shell, and a blowing stirring mechanism is installed at the upper end of the top plate. Compared with the prior art, the argon blowing stirring device is reasonable in structural design, when argon and molten steel are mixed, the stirring rods drive the inner pipe to synchronously rotate and stir through the cross rod, the multiple stirring rods on the outer side of the cross rod synchronously rotate and stir, the stirring efficiency is improved, and the argon blowing stirring device is convenient to use and high in practicability. Argon and molten steel are conveniently and uniformly stirred and mixed, harmful gas components in the molten steel can be conveniently and rapidly dissipated by inert gas argon, the smelting time is effectively shortened, energy consumption is effectively reduced, dross and bottom slag in the molten steel are conveniently and rapidly separated from pure molten steel, float to the upper end of the molten steel and precipitate to the lower end of the molten steel, and the molten steel can be completely molten. And the working efficiency and the using effect are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stainless steel vacuum smelting, in particular to a stirring device for an ultra-pure stainless steel smelting furnace. Background Art

[0002] Ultra-pure stainless steel requires that the contents of carbon, nitrogen, oxygen, and hydrogen are not greater than 60×10-16, 65×10-16, 5×10-16, and 1.6×10-16 respectively. It is mainly used in semiconductor manufacturing devices, printed circuits, and ultra-high vacuum components, etc.

[0003] When the smelting furnace melts ultra-pure stainless steel, since most crucible resistance furnaces are not equipped with stirring, the floating slag and bottom slag in the pure stainless steel water cannot be quickly separated from the pure molten steel, resulting in a longer standing time of the molten steel and affecting work efficiency. Therefore, we provide a stirring device for an ultra-pure stainless steel smelting furnace to solve this problem. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the defects existing in the prior art and provide a stirring device for an ultra-pure stainless steel smelting furnace.

[0005] To achieve the above purpose, the technical solution of the utility model is to design a stirring device for an ultra-pure stainless steel smelting furnace, including a shell. An operation door is movably installed on the outer side of the shell. A top plate is installed at the upper end of the shell. A blowing and stirring mechanism is installed at the upper end of the top plate. A circular hole is provided at the upper end of the top plate. The lower end of the blowing and stirring mechanism passes through the circular hole and extends into the inner cavity of the shell. A support assembly is installed in the inner cavity of the shell. An electromagnetic crucible body is placed on the upper end of the support assembly. The electromagnetic crucible body is located below the blowing and stirring mechanism;

[0006] The blowing and stirring mechanism includes a wind hood installed at the upper end of the top plate. An air inlet pipe is connected to the outer side of the wind hood. An electromagnetic valve is installed on the outer side of the air inlet pipe. The top end of the inner cavity of the wind hood is connected to a support shaft through a bearing seat. Blades are equidistantly connected to the outer side of the support shaft. A through hole is provided at the lower end of the wind hood. The lower end of the support shaft is connected to a first fixing plate. The first fixing plate is located in the inner cavity of the through hole. A blowing component and a stirring component are installed on the upper end of the first fixing plate.

[0007] A further preferably technical solution is that the blowing component includes an outer pipe connected to the first fixing plate. An inner pipe is movably sleeved in the inner cavity of the outer pipe. A limit sleeve is installed on the upper part of the outer side of the inner pipe. Oblique air outlet holes are equidistantly provided on the lower part of the outer side of the inner pipe.

[0008] A further preferably technical solution is that the stirring assembly includes a fixed pipe connected to the first fixed disk. A fixed sleeve is movably arranged in the inner cavity of the fixed pipe. A stirring shaft is connected to the middle of the fixed sleeve. A spring is jointly connected between the bottom end of the inner cavity of the fixed sleeve and the fixed pipe. The outer side of the stirring shaft is connected to the inner pipe through a cross bar. Stirring rods are equidistantly connected to the lower end of the cross bar.

[0009] A further preferably technical solution is that a second fixed disk is jointly installed on the outer sides of the outer pipe and the fixed pipe. An annular groove matching the position thereof is arranged at the lower end of the top plate.

[0010] A further preferably technical solution is that the supporting assembly includes a supporting frame installed in the inner cavity of the shell. The inner side of the supporting frame is connected to a clamping seat through a plurality of connecting rods. The electromagnetic crucible body is inserted and placed in the inner cavity of the clamping seat.

[0011] A further preferably technical solution is that a vacuum pump is installed on the outer side of the shell through a mounting plate. One end of the vacuum pump is connected to an air extraction pipe. One end of the air extraction pipe penetrates through the shell and extends to the outside. A vacuum valve is installed on the outer side of the air extraction pipe.

[0012] The advantages and beneficial effects of the present utility model are as follows: The argon gas blows the blades to rotate, and the blades drive the support shaft to rotate. Thus, the support shaft drives the first fixed disk, the fixed column, the second fixed disk, the air blowing assembly and the stirring assembly to rotate synchronously. And due to the argon gas pressure, while the fixed sleeve compresses the spring, it drives the stirring shaft to move downward in the inner cavity of the fixed pipe. The stirring shaft drives the inner pipe to move downward synchronously through the cross bar, which is convenient for the stirring shaft and the inner pipe to rotate and move downward into the molten steel in the inner cavity of the electromagnetic crucible body at the same time. The stirring rods drive the inner pipe to rotate and stir synchronously through the cross bar, and a plurality of stirring rods on the outer side of the cross bar rotate and stir synchronously. At the same time, the argon gas is discharged through the inclined air outlet holes to be uniformly stirred and mixed with the molten steel, which is convenient for the inert gas argon to quickly dissipate the harmful gas components in the molten steel, effectively making the melting time short, reducing the energy consumption. And through the rotation stirring of the argon gas and the synchronous stirring of the stirring rods and the like, it is convenient for the floating slag and bottom slag in the molten steel to be quickly separated from the pure molten steel, effectively making the static process time short after stirring, and the purity of the molten steel in the middle part is high, improving the working efficiency and the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the overall three-dimensional structure diagram proposed by the present utility model;

[0014] Figure 2 is the overall internal unfolded three-dimensional structure diagram proposed by the present utility model;

[0015] Figure 3 is the overall semi-sectional three-dimensional structure diagram proposed by the present utility model;

[0016] Figure 4 Schematic perspective semi-sectional structure diagram of the housing proposed by the present utility model;

[0017] Figure 5 Schematic perspective semi-sectional structure diagram of the air blowing and stirring mechanism proposed by the present utility model;

[0018] Figure 6 Schematic perspective sectional and disassembled structure diagram of a part of the air blowing and stirring mechanism proposed by the present utility model;

[0019] Figure 7 Proposed by the present utility model Figure 6 Schematic enlarged structure diagram of part A device in

[0020] In the figure: 1. Housing; 2. Operating door; 3. Top plate; 4. Air blowing and stirring mechanism; 41. Air hood; 42. Bearing seat; 43. Support shaft; 44. Blade; 45. First fixing plate; 46. Fixing column; 47. Second fixing plate; 48. Air blowing assembly; 481. Outer tube; 482. Inner tube; 483. Limiting sleeve; 484. Oblique air outlet hole; 49. Stirring assembly; 491. Fixing tube; 492. Fixing sleeve; 493. Stirring shaft; 494. Spring; 495. Cross bar; 496. Stirring rod; 410. Air inlet pipe; 411. Solenoid valve; 5. Mounting plate; 6. Vacuum pump; 7. Support assembly; 71. Support frame; 72. Connecting rod; 73. Clamping seat; 8. Electromagnetic crucible body; 9. Exhaust pipe; 10. Vacuum valve; 11. Circular hole; 12. Annular groove. Specific embodiments

[0021] The following combines the accompanying drawings and embodiments to further describe the specific embodiments of the present utility model. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0022] Referring to Figures 1-7 , a stirring device for an ultra-pure stainless steel smelting furnace includes a housing 1, an operating door 2 is movably installed on the outer side of the housing 1, a top plate 3 is installed at the upper end of the housing 1, an air blowing and stirring mechanism 4 is installed at the upper end of the top plate 3, a circular hole 11 is provided at the upper end of the top plate 3, the lower end of the air blowing and stirring mechanism 4 passes through the circular hole 11 and extends into the inner cavity of the housing 1, the air blowing and stirring mechanism 4 includes an air hood 41 installed at the upper end of the top plate 3, an air inlet pipe 410 is connected to the outer side of the air hood 41, a solenoid valve 411 is installed on the outer side of the air inlet pipe 410, the top end of the inner cavity of the air hood 41 is connected to a support shaft 43 through a bearing seat 42, blades 44 are equidistantly connected to the outer side of the support shaft 43, a through hole is provided at the lower end of the air hood 41, the lower end of the support shaft 43 is connected to a first fixing plate 45, the first fixing plate 45 is located in the inner cavity of the through hole, and an air blowing assembly 48 and a stirring assembly 49 are installed at the upper end of the first fixing plate 45.

[0023] The air blowing assembly 48 includes an outer tube 481 connected to the first fixed disk 45. The inner cavity of the outer tube 481 movably sleeved with an inner tube 482. A limit sleeve 483 is installed on the upper part of the outer side of the inner tube 482. Oblique air outlet holes 484 are equidistantly arranged on the lower part of the outer side of the inner tube 482. A second fixed disk 47 is jointly installed on the outer sides of the outer tube 481 and the fixed tube 491. A circular groove 12 matching the position is arranged at the lower end of the top plate 3.

[0024] The stirring assembly 49 includes a fixed tube 491 connected to the first fixed disk 45. A fixed sleeve 492 is movably arranged in the inner cavity of the fixed tube 491. A stirring shaft 493 is connected to the middle of the fixed sleeve 492. A spring 494 is jointly connected to the bottom end of the inner cavity of the fixed sleeve 492 and the fixed tube 491. The outer side of the stirring shaft 493 is connected to the inner tube 482 through a cross bar 495. Stirring rods 496 are equidistantly connected to the lower end of the cross bar 495.

[0025] By opening the solenoid valve 411, the air inlet pipe 410 is connected to an external conveying pipe, and then argon is conveyed. After the argon enters the air hood 41, it blows the blades 44 to rotate, and the blades 44 drive the support shaft 43 to rotate. Thus, the support shaft 43 drives the first fixed disk 45, the fixed column 46, the second fixed disk 47, the air blowing assembly 48 and the stirring assembly 49 to rotate synchronously. The second fixed disk 47 rotates in the inner cavity of the circular groove, effectively improving the rotation stability effect. Part of the argon enters the fixed tube 491. The conveying pressure of the argon at the same time is relatively large. Then the argon entering the fixed tube 491 pushes the fixed sleeve 492 and the stirring shaft 493. Then the fixed sleeve 492 and the stirring shaft 493 move downward. The fixed sleeve 492 simultaneously compresses the spring 494. The stirring shaft 493 drives the inner tube 482 to move downward synchronously through the cross bar 495. It is convenient that when the argon is conveyed, the relatively large argon pressure drives the stirring rods 496 of the stirring assembly 49 and the inner tube 482 of the air blowing assembly 48 to move downward into the inner cavity of the electromagnetic crucible body 8. When the argon is discharged from the oblique air outlet holes 484 and mixed with the stainless steel liquid, the stirring rods 496 drive the inner tube 482 to rotate and stir synchronously through the cross bar 495, and the multiple stirring rods 496 on the outer side of the cross bar 495 rotate and stir synchronously. It is convenient for the inert gas argon to quickly dissipate the harmful gas components in the molten steel. And through the rotation stirring of the argon and the synchronous stirring of the stirring rods 496 and the like, it is convenient for the floating slag and bottom slag in the molten steel to be quickly separated from the pure molten steel and float to the upper end and precipitate to the lower end of the molten steel. Effectively making the melting time short, reducing energy consumption, and improving the working efficiency and use effect.

[0026] The inner cavity of the housing 1 is installed with a support assembly 7. The upper end of the support assembly 7 places the electromagnetic crucible body 8. The electromagnetic crucible body 8 is located below the blowing and stirring mechanism 4. The support assembly 7 includes a support frame 71 installed in the inner cavity of the housing 1. The inner side of the support frame 71 is connected to a clamping seat 73 through a plurality of connecting rods 72. The electromagnetic crucible body 8 is inserted and placed in the inner cavity of the clamping seat 73. By inserting the electromagnetic crucible body 8 into the clamping seat 73, it is convenient to take the electromagnetic crucible body 8 and convenient to use.

[0027] The outside of the housing 1 is installed with a vacuum pump 6 through a mounting plate 5. One end of the vacuum pump 6 is connected to an air extraction pipe 9. One end of the air extraction pipe 9 penetrates the housing 1 and extends to the outside. A vacuum valve 10 is installed on the outside of the air extraction pipe 9. Before melting the molten steel, the vacuum pump 6 and the vacuum valve 10 are opened. The vacuum pump 6 performs a vacuum pumping operation on the inner cavity of the housing 1 through the air extraction pipe 9, which is convenient for subsequent vacuum melting operations.

[0028] Working principle: The utility model is controlled and connected to a solenoid valve 411, a vacuum pump 6, and an electromagnetic crucible body 8 through an external controller. During use, the ladle is placed in the inner cavity of the electromagnetic crucible body 8. The vacuum pump 6 and the vacuum valve 10 are opened, and the vacuum pump 6 performs a vacuum pumping operation on the inner cavity of the housing 1 through the suction pipe 9. After the vacuum pumping operation is completed, the vacuum pump 6 and the vacuum valve 10 are closed. And the vacuum pumping operation is the existing stainless steel melting operation, which will not be elaborated here. Subsequently, the electromagnetic crucible body 8 is opened to melt the ladle in its inner cavity. When the molten steel is formed, by opening the solenoid valve 411, the inert gas argon is transported into the hood 41 through the inlet pipe 410. Then, the argon gas blows the blade 44 to rotate, and the blade 44 drives the support shaft 43 to rotate. Thus, the support shaft 43 drives the first fixed disk 45, the fixed column 46, the second fixed disk 47, as well as the air blowing assembly 48 and the stirring assembly 49 to rotate synchronously. And a part of the argon gas enters the outer pipe 481 and then discharges from the inclined outlet holes 484 at the lower part of the outer side of the inner pipe 482. At the same time, part of the argon gas enters the fixed pipe 491. Since the aperture of the inclined outlet holes 484 is small and the conveying pressure of the argon gas at the same time is large, the argon gas entering the fixed pipe 491 pushes the fixed sleeve 492 and the stirring shaft 493. Then, the fixed sleeve 492 and the stirring shaft 493 move downward, and the fixed sleeve 492 compresses the spring 494 at the same time. And the stirring shaft 493 drives the inner pipe 482 to move downward synchronously through the cross bar 495, which is convenient for the argon gas with a large pressure to drive the stirring rod 496 of the stirring assembly 49 and the inner pipe 482 of the air blowing assembly 48 to move downward into the inner cavity of the electromagnetic crucible body 8 during the argon gas conveying process. When the argon gas discharged from the inclined outlet holes 484 is mixed with the stainless steel liquid, the stirring rod 496 drives the inner pipe 482 to rotate and stir synchronously through the cross bar 495, and multiple stirring rods 496 on the outer side of the cross bar 495 rotate and stir synchronously, which is convenient for the inert gas argon to quickly dissipate the harmful gas components in the molten steel, effectively shortening the melting time, reducing energy consumption, and through the rotating stirring of the argon gas and the synchronous stirring of the stirring rods 496, etc., it is convenient for the floating slag and bottom slag in the molten steel to be quickly separated from the pure molten steel, and under the blowing and stirring of the argon gas, the molten steel will not splash violently, effectively improving the operation safety. And after the air blowing and stirring mechanism works for a set time, the argon gas conveying is stopped. Then, the compressed spring 494 rebounds, and then drives the fixed sleeve 492 and the stirring shaft 493 to reset. And the stirring shaft 493 drives the inner pipe 482 to reset through the cross bar 495. At this time, the floating slag in the molten steel quickly floats upward and the bottom slag quickly precipitates downward, effectively shortening the static process time after stirring and having a high purity of the molten steel in the middle part, improving the work efficiency and the use effect.

[0029] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. A stirring device for an ultra-pure stainless steel smelting furnace, comprising a housing, characterized in that, An operation door is movably installed on the outer side of the housing. A top plate is installed at the upper end of the housing. A blowing and stirring mechanism is installed at the upper end of the top plate. A round hole is provided at the upper end of the top plate. The lower end of the blowing and stirring mechanism passes through the round hole and extends into the inner cavity of the housing. A support assembly is installed in the inner cavity of the housing. An electromagnetic crucible body is placed on the upper end of the support assembly. The electromagnetic crucible body is located below the blowing and stirring mechanism; The blowing and stirring mechanism includes a wind hood installed at the upper end of the top plate. An air inlet pipe is connected to the outer side of the wind hood. A solenoid valve is installed on the outer side of the air inlet pipe. The top end of the inner cavity of the wind hood is connected to a support shaft through a bearing seat. Blades are equidistantly connected to the outer side of the support shaft. A through hole is provided at the lower end of the wind hood. The lower end of the support shaft is connected to a first fixing plate. The first fixing plate is located in the inner cavity of the through hole. A blowing assembly and a stirring assembly are installed on the upper end of the first fixing plate.

2. The stirring device of an ultra-pure stainless steel smelting furnace according to claim 1, characterized in that, The blowing assembly includes an outer pipe connected to the first fixing plate. An inner pipe is movably sleeved in the inner cavity of the outer pipe. A limit sleeve is installed on the upper part of the outer side of the inner pipe. Obliquely arranged air outlet holes are equidistantly provided on the lower part of the outer side of the inner pipe.

3. The stirring device of an ultra-pure stainless steel smelting furnace according to claim 2, characterized in that, The stirring assembly includes a fixed pipe connected to the first fixing plate. A fixed sleeve is movably arranged in the inner cavity of the fixed pipe. A stirring shaft is connected to the middle of the fixed sleeve. Springs are commonly connected between the bottom end of the inner cavity of the fixed sleeve and the fixed pipe. The outer side of the stirring shaft is connected to the inner pipe through a cross bar. Stirring rods are equidistantly connected to the lower end of the cross bar.

4. The stirring device of an ultra-pure stainless steel smelting furnace according to claim 3, characterized in that, A second fixing plate is commonly installed on the outer sides of the outer pipe and the fixed pipe. An annular groove with a matching position is provided at the lower end of the top plate.

5. The stirring device of an ultra-pure stainless steel smelting furnace according to claim 1, characterized in that, The support assembly includes a support frame installed in the inner cavity of the housing. The inner side of the support frame is connected to a clamping seat through a plurality of connecting rods. The electromagnetic crucible body is inserted and placed in the inner cavity of the clamping seat.

6. The stirring device of an ultra-pure stainless steel smelting furnace according to claim 1, characterized in that, A vacuum pump is installed on the outer side of the housing through a mounting plate. One end of the vacuum pump is connected to an air extraction pipe. One end of the air extraction pipe penetrates through the housing and extends to the outside. A vacuum valve is installed on the outer side of the air extraction pipe.

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