Airflow grading device for boron carbide purification

Abstract

The utility model discloses an airflow grading device for boron carbide purification, which belongs to the field of airflow graders and comprises a shell, and a driving motor and a cinder valve are fixedly mounted at the top and the bottom of the shell respectively. An exhaust pipe, a feeding pipe and an air inlet pipe are fixedly installed on the outer wall of the top and the outer wall of the bottom of the shell respectively, a through hole right opposite to the separation impeller is formed in an air guide barrel, air can be blown right opposite to the outer wall of the separation impeller through the through hole, the dispersion efficiency of boron carbide powder particles on the separation impeller is improved, and the separation efficiency of the boron carbide powder particles is improved. The outer sides of the through holes are sleeved with shielding rings, the through holes in the positions can be closed by adjusting the shielding rings to be arranged on the outer sides of the corresponding through holes in a sleeving mode, air can be blown to the outer wall of the separation impeller through the other through holes, the effect of adjusting the air blowing area is achieved, and the force of blowing air to the outer wall of the separation impeller through the other through holes can be increased; the separation efficiency of the boron carbide powder particles is improved.

Description

Technical Field

[0001] The utility model relates to the field of airflow classifiers, and more specifically to an airflow classifier for purifying boron carbide. Background Art

[0002] Boron carbide, also known as black diamond, is an inorganic substance with the chemical formula B4C, usually in the form of gray-black powder. It is one of the three hardest materials known (after diamond and cubic boron nitride) and is used in tank armor, bulletproof vests and many industrial applications.

[0003] One of the steps in the purification of boron carbide is to use an airflow classification device to classify the boron carbide powder to obtain the required boron carbide powder with the smallest particle size, so as to facilitate the subsequent smelting and purification, and therefore an airflow classification device is needed. In the existing airflow classification device, the separated airflow is mostly blown in from the bottom of the device, and then blown into the separation impeller from the outer wall of the separation impeller in an oblique upward form through the guide of the conical air guide cover. Although such a structural form can disperse the boron carbide powder particles broken up inside the separation impeller, the wind is not blown directly at the boron carbide powder particles that are centrifugally scattered, which is not conducive to the rapid dispersion of the boron carbide powder particles, and there is a lack of targeted blowing structure at the separation impeller, which is not conducive to the concentrated and targeted blowing of the wind entering the separation chamber to the local area, affecting the blowing efficiency, so we propose an airflow classification device for boron carbide purification to solve the above-mentioned problems. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide an air flow classification device for purifying boron carbide, which has an air guide tube structure, and a through hole is opened on the air guide tube which is directly opposite to the separation impeller, so that wind can blow directly to the outer wall of the separation impeller through the through hole, thereby improving the dispersion efficiency of boron carbide powder particles in the separation impeller; and a shielding ring is sleeved on the outside of the through hole, and the through hole at that location can be closed by adjusting the shielding ring to sleeve on the outside of the corresponding through hole, so that wind can be blown to the outer wall of the separation impeller through the remaining through holes, that is, the effect of regulating the blowing area is achieved, and the force of the wind blowing to the outer wall of the separation impeller through the remaining through holes can be increased, thereby increasing the separation efficiency of the boron carbide powder particles.

[0006] 2. Technical solution

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] An airflow classification device for purifying boron carbide comprises a shell, a driving motor and an ash discharge valve are fixedly installed on the top and bottom of the shell respectively, and an exhaust pipe, a feed pipe and an air inlet pipe are fixedly installed on the outer walls of the top and bottom of the shell respectively, and a feed valve is arranged on the feed pipe;

[0009] The inside of the shell is provided with a coupling chamber, a feeding chamber, a separation chamber and an air inlet chamber from top to bottom in sequence, the top of the air inlet duct extends into the inside of the air inlet chamber, the inner wall of the air inlet chamber located at the top of the air inlet duct is fixedly welded with a conical air guide cover through a cross bar, the top of the separation chamber located at the top of the conical air guide cover is fixedly installed with an air guide tube, a plurality of through holes are symmetrically provided on both sides of the outer wall of the air guide tube, a shielding ring is sleeved on the outer wall of the air guide tube corresponding to two of the through holes in the horizontal direction, and levers are fixedly welded on both sides of the outer wall of the shielding ring, a sliding hole is provided on the shell at the connection between the lever and the shell, a sealing plate is fixedly welded on the lever at the connection between the sliding hole and the lever, and one side of the sealing plate is in close contact with the outer side of the sliding hole.

[0010] Furthermore, a spring bolt is fixedly installed on the outer wall of the shell corresponding to the position of the sliding hole.

[0011] Furthermore, a ventilation shaft base plate is fixedly installed inside the outer shell at the connection between the feed chamber and the separation chamber, a rotating shaft is rotatably connected inside the ventilation shaft base plate, a separation impeller is fixedly installed at the bottom of the rotating shaft, the top of the rotating shaft passes through the feed chamber to the inside of the coupling chamber, the driving shaft at the bottom of the driving motor passes through the coupling chamber, and the driving shaft at the bottom of the driving motor is connected to the top of the rotating shaft through a coupling.

[0012] Furthermore, the exhaust pipe and the feed pipe are both connected to the interior of the feed chamber, and the valve core inside the feed valve is a star-shaped impeller valve core.

[0013] Furthermore, the length and width of the sealing plate are both greater than the length and width of the sliding hole.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) In this solution, an air guide tube structure is provided, and a through hole is opened on the air guide tube directly facing the separation impeller, so that wind can pass through the through hole and blow directly to the outer wall of the separation impeller, thereby improving the dispersion efficiency of boron carbide powder particles in the separation impeller;

[0017] (2) In this solution, a shielding ring is sleeved on the outside of the through hole. By adjusting the shielding ring to sleeve on the outside of the corresponding through hole, the through hole at that location can be closed, so that wind can be blown to the outer wall of the separation impeller through the remaining through holes, thereby achieving the effect of regulating the blowing area and increasing the force of the wind blowing through the remaining through holes to the outer wall of the separation impeller, thereby increasing the separation efficiency of the boron carbide powder particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 For the utility model Figure 1 The enlarged structural diagram at A in the middle;

[0020] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the housing of the utility model;

[0021] Figure 4 For the utility model Figure 3 The enlarged structural diagram at B in the middle;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the shell of the utility model.

[0023] Description of the numbers in the figure:

[0024] 1. Shell; 101. Coupling cavity; 102. Feeding cavity; 103. Separation cavity; 104. Air inlet cavity; 2. Driving motor; 3. Ash discharge valve; 4. Exhaust duct; 5. Feeding pipe; 6. Air inlet duct; 7. Feeding valve; 8. Conical air guide hood; 9. Air guide tube; 901. Through hole; 10. Shielding ring; 11. Push rod; 12. Sliding hole; 13. Sealing plate; 14. Spring bolt; 15. Ventilation shaft seat plate; 16. Rotating shaft; 17. Separation impeller. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention specification; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] See also Figure 1-Figure 5, an air flow classification device for purifying boron carbide, comprising a shell 1, a driving motor 2 and an ash discharge valve 3 are fixedly installed on the top and bottom of the shell 1, and an exhaust pipe 4, a feed pipe 5 and an air inlet pipe 6 are fixedly installed on the top and bottom outer walls of the shell 1, and a feed valve 7 is arranged on the feed pipe 5;

[0028] A coupling chamber 101, a feeding chamber 102, a separation chamber 103 and an air inlet chamber 104 are sequentially arranged inside the shell 1 from top to bottom. The top of the air inlet pipe 6 extends to the inside of the air inlet chamber 104. A conical air guide cover 8 is fixedly welded to the inner wall of the air inlet chamber 104 located at the top of the air inlet pipe 6 through a cross bar. An air guide tube 9 is fixedly installed on the top of the separation chamber 103 located at the top of the conical air guide cover 8. A plurality of through holes 901 are symmetrically arranged on both sides of the outer wall of the air guide tube 9. A shielding ring 10 is sleeved on the outer wall of the air guide tube 9 corresponding to the two through holes 901 in the horizontal direction. A lever 11 is fixedly welded to both sides of the outer wall of the shielding ring 10. A sliding hole 12 is arranged on the shell 1 at the connection between the lever 11 and the shell 1. A sealing plate 13 is fixedly welded on the lever 11 at the connection between the sliding hole 12 and the lever 11. One side of the sealing plate 13 is in close contact with the outer side of the sliding hole 12.

[0029] A ventilation shaft base plate 15 is fixedly installed inside the housing 1 at the connection between the feeding chamber 102 and the separation chamber 103, a rotating shaft 16 is rotatably connected inside the ventilation shaft base plate 15, a separation impeller 17 is fixedly installed at the bottom of the rotating shaft 16, the top of the rotating shaft 16 passes through the feeding chamber 102 to the inside of the coupling chamber 101, the driving shaft at the bottom of the driving motor 2 passes through the inside of the coupling chamber 101, and the driving shaft at the bottom of the driving motor 2 is connected to the top of the rotating shaft 16 through the coupling;

[0030] The working principle of the airflow classification device for purifying boron carbide is as follows:

[0031] First, the driving motor 2 is started so that the driving motor 2 can drive the separation impeller 17 to rotate, and the external wind enters the air inlet chamber 104 through the air inlet pipe 6, and enters the gap between the outer shell 1 and the air guide tube 9 after being guided by the conical air guide cover 8, and then blows directly to the separation impeller 17 through the through hole 901 on the air guide tube 9. At this time, the material can be fed to the lower material chamber 102 through the feeding pipe 5. When the boron carbide powder particles reach the separation impeller 17 through the ventilation shaft base plate 15, they are separated by the separation impeller 17 while rotating. The small-sized boron carbide powder particles are blown upward by the wind and then discharged through the exhaust pipe 4. The large-sized boron carbide powder particles are thrown outward through the gap between the blades on the separation impeller 17, and fall downward after hitting the inner wall of the air guide tube 9, until they fall to the bottom of the air inlet chamber 104 at the bottom, and can be discharged by opening and closing the ash discharge valve 3;

[0032] When it is necessary to adjust the blowing area at the outer wall of the separation impeller 17, it is only necessary to lift up the shielding ring 10 at the through hole 901 that does not need ventilation to cover the two through holes 901 there. At this time, no wind will be blown out from there, achieving the effect of controlling the blowing area.

[0033] Embodiment 2:

[0034] In view of the above embodiment 1, for further description, refer to Figure 1 , Figure 2 as well as Figure 4 A spring bolt 14 is fixedly installed on the outer wall of the shell 1 at the position corresponding to the sliding hole 12; the exhaust pipe 4 and the feed pipe 5 are both connected to the inside of the discharge chamber 102, and the valve core inside the feed valve 7 is a star-shaped impeller valve core; the length and width of the sealing plate 13 are both greater than the length and width of the sliding hole 12.

[0035] The spring bolt 14 can be set to limit the corresponding lever 11 when the shielding ring 10 is lifted, ensuring that the shielding ring 10 can be stably sleeved on the outside of the corresponding through hole 901. The valve core inside the feed valve 7 is a star-shaped impeller valve core. This structure can prevent part of the wind inside the discharge chamber 102 from leaking through the feed pipe 5 during discharge. The setting of the sealing plate 13 can improve the sealing performance at the sliding hole 12.

[0036] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. An airflow classification device for purifying boron carbide, comprising a housing (1), characterized in that: A driving motor (2) and an ash discharge valve (3) are fixedly mounted on the top and bottom of the shell (1), respectively, and an exhaust pipe (4), a feed pipe (5) and an air inlet pipe (6) are fixedly mounted on the top and bottom outer walls of the shell (1), respectively, and a feed valve (7) is provided on the feed pipe (5); The housing (1) is provided with a coupling chamber (101), a material discharge chamber (102), a separation chamber (103) and an air inlet chamber (104) in sequence from top to bottom; the top of the air inlet pipe (6) extends into the air inlet chamber (104); a conical air guide cover (8) is fixedly welded to the inner wall of the air inlet chamber (104) at the top of the air inlet pipe (6) via a cross bar; an air guide tube (9) is fixedly installed at the top of the separation chamber (103) at the top of the conical air guide cover (8); and a plurality of symmetrical openings are provided on both sides of the outer wall of the air guide tube (9) at equal distances. A through hole (901) is provided, and a shielding ring (10) is sleeved on the outer wall of the air guide tube (9) between two of the through holes (901) in the horizontal direction. A lever (11) is fixedly welded on both sides of the outer wall of the shielding ring (10). A sliding hole (12) is provided on the outer shell (1) at the connection between the lever (11) and the outer shell (1). A sealing plate (13) is fixedly welded on the lever (11) at the connection between the sliding hole (12) and the lever (11), and one side of the sealing plate (13) is in close contact with the outer side of the sliding hole (12).

2. The airflow classification device for purifying boron carbide according to claim 1, characterized in that: A spring bolt (14) is fixedly mounted on the outer wall of the housing (1) at a position corresponding to the sliding hole (12).

3. The airflow classification device for purifying boron carbide according to claim 1, characterized in that: A ventilation shaft base plate (15) is fixedly installed inside the shell (1) at the connection between the feed chamber (102) and the separation chamber (103); a rotating shaft (16) is rotatably connected inside the ventilation shaft base plate (15); a separation impeller (17) is fixedly installed at the bottom of the rotating shaft (16); the top of the rotating shaft (16) passes through the feed chamber (102) to the inside of the coupling chamber (101); the driving shaft at the bottom of the driving motor (2) passes through the inside of the coupling chamber (101), and the driving shaft at the bottom of the driving motor (2) is connected to the top of the rotating shaft (16) through a coupling.

4. The airflow classification device for purifying boron carbide according to claim 1, characterized in that: The exhaust pipe (4) and the feed pipe (5) are both connected to the interior of the feed chamber (102), and the valve core inside the feed valve (7) is a star-shaped impeller valve core.

5. The airflow classification device for purifying boron carbide according to claim 1, characterized in that: The length and width of the sealing plate (13) are both greater than the length and width of the sliding hole (12).

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