Screening and discharging device for silicon carbide smelting product production

Abstract

The utility model discloses a screening blanking device for silicon carbide smelted product production, which comprises a base and a screening cylinder, three screening nets are fixedly arranged in the screening cylinder, a plurality of groups of screening holes are arranged on the surface of the screening cylinder, the diameters of the screening holes in each group are different, and the screening cylinder has a trend of increasing from left to right in sequence. The screening device has the advantages that the multiple sets of screening holes are formed in the surface of the screening cylinder, the diameters of all the sets of screening holes are different, the screening cylinder has the trend of increasing from left to right in sequence, the set of screening holes in the leftmost side can be used for screening silicon carbide smelting particles with ultra-fine granularity, and the rest can be done in the same manner; silicon carbide smelting particles with ultra-fine, fine, medium and coarse particle sizes can be screened from left to right, and the silicon carbide particles attached in the screening holes of the screening cylinder can be swept off through the brush on the outer end face of the cleaning frame, so that the screening process cannot be hindered.

Description

Technical Field

[0001] The utility model belongs to the technical field of screening devices for silicon carbide, and particularly relates to a screening and feeding device for the production of silicon carbide smelting products. Background Art

[0002] Silicon carbide (SiC) is made from quartz sand, petroleum coke (or coal coke), and wood chips through high-temperature smelting in an electric resistance furnace. Silicon carbide also exists as a rare mineral in nature: moissanite. Silicon carbide is also known as carborundum. Among contemporary non-oxide high-tech refractory raw materials such as C, N, and B, silicon carbide is the most widely used and most economical one, and can be called emery or refractory sand. In the electrical industry, silicon carbide can be used as the valve body of lightning arresters, silicon carbide heating elements, far-infrared heaters, etc. In the aerospace industry, gas filter discs and combustion chamber nozzles made of silicon carbide have been used in rocket technology. Since silicon carbide ultrafine powder is used in the abrasive industry, there are special requirements for the classification of ultrafine powder, and no large particles should appear in the ultrafine powder. Therefore, a screening device is used at this time. Currently, when screening silicon carbide, it is mostly through a vibration motor to vibrate the screening plate, and then the silicon carbide is screened. However, the vibration motor will generate a lot of noise during operation, which will greatly damage the physical health of the staff.

[0003] In the prior art, a screening device for processing silicon carbide ultrafine powder with the patent number CN215088854U includes: a screening box, a feeding hopper, and a top cover. Inside the screening box, a first screening net is fixedly connected above, a second screening net is fixedly connected below the first screening net, and a third screening net is fixedly connected below the second screening net. The mesh of the first screening net is larger than that of the second screening net, and the mesh of the second screening net is larger than that of the third screening net. The first screening net, the second screening net, and the third screening net are all fixedly connected to the inner four walls of the screening box. The middle parts of the bottoms of the first screening net, the second screening net, and the third screening net are all fixedly connected with vibration motors, and a dust suction structure is arranged on one side of the surface of the screening box.

[0004] In the above device, when screening silicon carbide, a great deal of noise will be generated by the vibration motor, affecting the surrounding staff. And when the above-mentioned screening net is used for screening, the silicon carbide will easily block the mesh openings of the screening net, affecting the screening work below. Content of the Utility Model

[0005] The utility model aims to overcome the deficiencies of the prior art and provides a screening and feeding device for the production of silicon carbide smelting products.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A screening and feeding device for the production of silicon carbide smelting products, including a base and a screening cylinder. Three screening meshes are fixedly arranged inside the screening cylinder, and the screen holes of the three screening meshes are all of a coarse grade, allowing coarse-grade silicon carbide particles to pass through.

[0007] Optionally, support frames I are symmetrically and fixedly arranged on the surface of the base. U-shaped support frames II are symmetrically and fixedly arranged on the upper end surfaces of the support frames I. A support cylinder is obliquely arranged between the U-shaped support frames II, and the screening cylinder is rotatably arranged inside the support cylinder.

[0008] Optionally, a support block is fixedly arranged at the upper end of the support frame I, and the support block is fixed to the support cylinder.

[0009] Optionally, connecting rings are symmetrically and fixedly arranged at both ends of the screening cylinder, and annular grooves are formed on the surfaces of the connecting rings.

[0010] Optionally, a rotating shaft is rotatably arranged between the two U-shaped support frames II. Rubber rollers are symmetrically and fixedly arranged on the surface of the rotating shaft, and the rubber rollers are rotatably arranged in the annular grooves.

[0011] Optionally, four material dropping ports are formed on the lower surface of the support cylinder, and four collection frames corresponding to the material dropping ports are slidably arranged on the surface of the base.

[0012] Optionally, supports are fixedly arranged on the middle surfaces of the two support frames I. A support shaft is fixedly arranged between the two supports. The support shaft passes through the screening cylinder and is in rotational cooperation with it, and three cleaning frames are fixedly arranged on the surface of the support shaft for each layer of the screening cylinder.

[0013] In summary, compared with the prior art, a screening and feeding device for the production of silicon carbide smelting products provided by the present utility model has the following beneficial effects:

[0014] 1. In the present utility model, by arranging several groups of screen holes on the surface of the screening cylinder, and the diameters of each group of screen holes are different, and show a trend of increasing from left to right on the screening cylinder. The leftmost group of screen holes can be used to screen extra-fine-grained silicon carbide smelting particles, and so on. From left to right, extra-fine, fine, medium, and coarse-grade silicon carbide smelting particles can be screened respectively.

[0015] 2. In the present utility model, when the screening cylinder rotates, the silicon carbide particles attached to the screen holes of the screening cylinder can be swept off by the brushes on the outer end faces of the cleaning frames, so as not to hinder the screening process.

[0016] 3. In the present utility model, the silicon carbide is sieved by rotating the sieving cylinder, so there will be no significant working noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of the present utility model Figure 1 ;

[0018] Figure 2 Schematic diagram of the overall structure of the present utility model Figure 2 ;

[0019] Figure 3 Schematic diagram of the structures of the sieving cylinder and the supporting cylinder of the present utility model;

[0020] Figure 4 Schematic diagram of the structures of some parts of the present utility model;

[0021] Figure 5 Schematic diagram of the sectional structure of the sieving cylinder of the present utility model;

[0022] Figure 6 Schematic diagram of the structures of the supporting shaft and the cleaning frame of the present utility model;

[0023] Figure 7 Schematic diagram of the bottom structure of the whole of the present utility model;

[0024] In the figures: 1, base; 11, first support frame; 111, support block; 12, collection box; 2, second U-shaped support frame; 21, rotating shaft; 22, rubber roller; 23, motor; 24, support; 3, supporting cylinder; 31, material dropping opening; 4, sieving cylinder; 41, connecting ring; 42, annular groove; 44, sieving mesh; 5, supporting shaft; 51, cleaning frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0026] Refer to Figures 1-7 , a sieving and feeding device for the production of silicon carbide smelting products, including a base 1, on the surface of the base 1, first support frames 11 are symmetrically and fixedly arranged, on the upper end surfaces of the first support frames 11, second U-shaped support frames 2 are symmetrically and fixedly arranged. The heights of the two end support rods of the first support frame 11 are different, so that the second U-shaped support frame 2 can be installed in an inclined state on the upper surface of the first support frame 11, and a supporting cylinder 3 is inclined between the second U-shaped support frames 2.

[0027] Refer to Figure 7, a support block 111 is fixedly arranged at the upper end of the first support frame 11. The support block 111 is fixed to the support cylinder 3 to place the support cylinder 3 and make it inclined.

[0028] Reference Figure 1 , a screening cylinder 4 is rotatably arranged in the support cylinder 3. A number of groups of screening holes are arranged on the surface of the screening cylinder 4. The diameter of each group of screening holes is different, and it shows a trend of increasing from left to right on the screening cylinder 4. The leftmost group of screening holes can be used to screen the extremely fine-grained silicon carbide smelting particles. And so on, from left to right, it can screen the extremely fine, fine, medium, and coarse-grained silicon carbide smelting particles respectively.

[0029] Reference Figure 2 , connecting rings 41 are symmetrically and fixedly arranged at both ends of the screening cylinder 4. An annular groove 42 is formed on the surface of the connecting ring 41. A rotating shaft 21 is rotatably arranged between the two U-shaped second support frames 2. Rubber rollers 22 are symmetrically and fixedly arranged on the surface of the rotating shaft 21. The rubber rollers 22 are rotatably arranged in the annular groove 42, and the rubber rollers 22 on both sides clamp the connecting ring 41, which is convenient for the rubber rollers 22 to drive the connecting ring 41 to rotate, thereby driving the screening cylinder 4 to rotate. A motor 23 is fixedly arranged on the outer side surface of one side of the first support frame 11. The output shaft of the motor 23 is fixed to one end of the rotating shaft 21. The rotation of the rotating shaft 21 is driven by the motor 23, and then the rubber rollers 22 drive the screening cylinder 4 to rotate.

[0030] Reference Figure 5 , three screening meshes 44 are fixedly arranged in the screening cylinder 4. The screening holes of the three screening meshes 44 are all of the coarse grade. When the screening cylinder 4 rotates for screening, the silicon carbide particles can be prevented from quickly entering the next layer of screening layer, making the screening of the silicon carbide particles in the screening cylinder 4 more meticulous, and also blocking the silicon carbide particles with a particle volume exceeding the coarse grade.

[0031] Further, the unscreened silicon carbide smelting particles are poured into the screening cylinder 4. Through the rotation of the screening cylinder 4, the extremely fine-grained silicon carbide smelting particles can be screened by the screening holes on the surface of the leftmost screening cylinder 4, and then the remaining particles pass through the mesh holes of the coarse-grade screening mesh 44 and enter the rear. And so on, when the silicon carbide smelting particles enter the rightmost screening cylinder 4, the coarse-grained silicon carbide particles can be screened through the screening holes on the surface of the screening cylinder 4 at this position.

[0032] Furthermore, the extra-fine silicon carbide particles will first be separated from the surface of the screening cylinder 4 with extra-fine screen holes. If a small portion of the extra-fine silicon carbide particles fails to separate from the screening cylinder 4, the remaining small portion will follow the fine, medium, and coarse-grade silicon carbide particles and enter the next layer of the screening cylinder 4 through the coarse grade. Then, the fine silicon carbide particles and a portion of the extra-fine grade silicon carbide particles will be separated from the surface of the screening cylinder 4 with fine screen holes. Subsequently, the remaining small portion will follow the medium and coarse-grade silicon carbide particles and enter the next layer of the screening cylinder 4 through the medium grade, and so on. In the rightmost screening cylinder 4, silicon carbide particles of different weights will be separated from the screening cylinder 4 simultaneously. Then, the separated fine, medium, and coarse-grade silicon carbide particles will be re-screened two to three times to completely separate the extra-fine, fine, medium, and coarse-grade silicon carbide particles. This method will not generate excessive noise and can protect the physical health of the staff.

[0033] Reference Figure 1 、 3 As shown in FIGS. Figure 1 and 3 , four material discharge openings 31 are provided on the lower surface of the support cylinder 3. Four collection frames 12 corresponding to the material discharge openings 31 are slidably arranged on the surface of the base 1. The material discharge openings 31 can guide the extra-fine, fine, medium, and coarse-grade silicon carbide particles into the corresponding collection frames 12. Moreover, the support cylinder 3 can prevent the silicon carbide particles adhering to the screen holes from falling outside when the screening cylinder 4 rotates.

[0034] Reference Figure 2 、 5 As shown in FIGS. Figure 2 and 5 , supports 24 are fixedly arranged on the middle surfaces of both the first supports 11. A support shaft 5 is fixedly arranged between the two supports 24. The support shaft 5 passes through the screening cylinder 4 and is in rotational fit. Three cleaning frames 51 are fixedly arranged on the surface of the support shaft 5 for each layer of the screening cylinder 4. Brushes are fixed to the outer end faces of the cleaning frames 51. The brushes are in close contact with the inner wall of the screening cylinder 4. When the screening cylinder 4 rotates, the brushes can sweep off the silicon carbide particles adhering to the screen holes of the screening cylinder 4 to prevent them from hindering the screening process.

[0035] As used in the specification and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in names as a way to distinguish components, but rather use the difference in functions of the components as the criterion for distinction. As used throughout the specification and claims, the term "comprising" is an open-ended term and should be interpreted as "including but not limited to". "Substantially" means within an acceptable error range. Those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0036] It should be noted that the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a commodity or system comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such commodity or system. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the commodity or system comprising said element.

[0037] The above description shows and describes several preferred embodiments of the present application. However, as previously mentioned, it should be understood that the present application is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the application concept described herein through the above teachings or the technology or knowledge in the relevant field. And any changes and variations made by those skilled in the art without departing from the spirit and scope of the present application shall fall within the protection scope of the appended claims of the present application.

Claims

1. A screening and unloading device for the production of silicon carbide smelting products, characterized in that: The invention comprises a base (1) and a screening cylinder (4), wherein three screening nets (44) are fixedly arranged inside the screening cylinder (4), and a plurality of groups of screening holes are arranged on the surface of the screening cylinder (4), wherein the diameter of each group of screening holes is different and shows a tendency to increase from left to right on the screening cylinder (4).

2. A screening and unloading device for producing silicon carbide smelting products according to claim 1, characterized in that: A support frame 1 (11) is symmetrically fixedly arranged on the surface of the base (1), a U-shaped support frame 2 (2) is symmetrically fixedly arranged on the upper end surface of the support frame 1 (11), a support cylinder (3) is obliquely arranged between the U-shaped support frames 2 (2), and the screening cylinder (4) is rotatably arranged inside the support cylinder (3).

3. A screening and unloading device for producing silicon carbide smelting products according to claim 2, characterized in that: A support block (111) is fixedly provided at the upper end of the support frame 1 (11), and the support block (111) is fixed to the support cylinder (3).

4. A screening and unloading device for producing silicon carbide smelting products according to claim 1, characterized in that: Connecting rings (41) are symmetrically fixedly arranged at both ends of the screening cylinder (4), and an annular groove (42) is provided on the surface of the connecting ring (41).

5. A screening and unloading device for producing silicon carbide smelting products according to claim 2, characterized in that: A rotating shaft (21) is rotatably arranged between the two U-shaped support frames (2), a rubber roller (22) is symmetrically fixedly arranged on the surface of the rotating shaft (21), and the rubber roller (22) is rotatably arranged in the annular groove (42).

6. A screening and unloading device for producing silicon carbide smelting products according to claim 2, characterized in that: The lower surface of the supporting cylinder (3) is provided with four material dropping openings (31), and the surface of the base (1) is slidably provided with four collecting frames (12) corresponding to the material dropping openings (31).

7. A screening and unloading device for producing silicon carbide smelting products according to claim 3, characterized in that: A support (24) is fixedly arranged on the middle surface of the two support frames (11), a support shaft (5) is fixedly arranged between the two support frames (24), the support shaft (5) penetrates the screening cylinder (4) and is rotatably matched, and three cleaning frames (51) are fixedly arranged on the surface of the support shaft (5) of each layer of the screening cylinder (4).

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