Silicon carbide micro-powder coarse and fine screening device

Abstract

The utility model discloses a silicon carbide micro powder coarse and fine screening device which comprises a screening box, two guide plates are welded in the screening box, and a screening hopper is arranged between the two guide plates. The second motor is started to drive the cam to rotate, the cam is promoted to push the screening hopper in a reciprocating mode under the action of the contact block, and due to the fact that the two sets of sleeves, sleeve rods, supporting blocks and springs are arranged at the right end of the screening hopper, the effect of resetting of the screening hopper in the pushing stage is achieved; the screening hopper can reciprocate in the screening box under the guiding action of two guide plates, a first motor is started to drive a stirring rod to rotate, the stirring rod drives a blocking block to rotate while stirring silicon carbide micro powder, the blocking block is forced to intermittently block a discharging hole of a partition disc till the silicon carbide micro powder intermittently enters the screening hopper, and the screening effect is improved. Compared with the prior art, a built-in screening box and an intermittent discharging structure are adopted, and the continuous screening device has the advantages of continuous screening, blockage prevention and dust raising prevention.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon carbide micropowder processing, in particular to a silicon carbide micropowder coarse and fine screening device. Background Art

[0002] Silicon carbide micropowder refers to micron-sized silicon carbide powder that is ultra-finely ground and graded using JZFZ equipment. Silicon carbide micropowders are primarily 1200# and 1500#. Because silicon carbide micropowders are primarily used in the abrasive industry, special requirements apply to their grading: large particles must be avoided. Therefore, to meet both international and domestic product requirements, JZF grading equipment is generally used for high-precision grading. Domestic silicon carbide micropowders are primarily black and green.

[0003] The existing technology has the following problems:

[0004] In the prior art, silicon carbide micropowder needs to be screened multiple times after passing through a magnetic separator to avoid mixing of large and small particles in the micropowder. However, the existing screening device only has a screening function (for example: Announcement No. CN212418624U ), has the problem of relatively single function and is difficult to meet the current requirements for silicon carbide micropowder screening.

[0005] To this end, we proposed a silicon carbide micropowder coarse and fine screening device to solve the above-mentioned drawbacks. Utility Model Content

[0006] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a coarse and fine screening device for silicon carbide micropowder.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a silicon carbide micro powder coarse and fine screening device, including a screening box, two guide plates are welded inside the screening box, and a screening bucket is provided between the two guide plates, the left end of the screening bucket is embedded with an ultrafine filter, and the right end of the screening bucket is fixedly installed with a sleeve rod, the outer periphery of the sleeve rod is sleeved with a sleeve, and the sleeve is fixedly connected to the inner wall of the screening box, one end of the sleeve rod is fixedly connected to a support block, and the surface of the sleeve rod is sleeved with a spring, and the two ends of the spring are respectively connected to the inner wall of the sleeve and the support block. The end faces of the blocks are abutted against each other, the top surface of the sub-screening bucket is connected to the feed hopper, and the top of the feed hopper extends to the outside of the sub-screening box, the top surface of the feed hopper is fixedly installed with a first motor, and the output end of the first motor is fixedly connected to a stirring rod through a coupling, the bottom of the stirring rod is fixedly connected to a blocking block, a partition disc is welded inside the feed hopper, and a discharge hole is provided on the surface of the partition disc corresponding to the blocking block, a second motor is fixedly installed on the right side of the top surface of the sub-screening box, and the output end of the second motor is fixedly connected to a cam, the side of the cam is abutted with a contact block, and the contact block is welded to the right end face of the sub-screening bucket.

[0008] Preferably, a powder recovery box is fixedly installed on the outer wall of the screening box, and the top surface of the powder recovery box is connected to an adsorption cover through a pipe. The adsorption cover is installed at the left corner inside the screening box. A dust filter bag is fixed to the bottom of the powder recovery box by screws, and a dust suction fan is installed on the side wall of the powder recovery box, and the dust suction port of the dust suction fan is connected to the powder recovery box through the filter cover.

[0009] Preferably, a coarse powder discharge pipe is installed obliquely on the side of the screening bucket, and a columnar sealing plug is inserted in the coarse powder discharge pipe. The left side of the bottom of the screening box is connected to the fine powder discharge hopper, and a feed port is opened at the edge of the top surface of the screening bucket.

[0010] Preferably, an upper opening is provided on the top surface of the screening box corresponding to the screening bucket, and a side opening is provided on the side wall surface of the screening box corresponding to the coarse powder discharge pipe.

[0011] Preferably, the screening bucket is a box-type structure as a whole, and an inclined surface is provided on the inner bottom surface of the screening bucket.

[0012] Preferably, a plurality of stirring columns are vertically welded to the surface of the stirring rod, and the block size of the stirring rod is larger than the size of the feed hole.

[0013] Preferably, the filter cover is composed of a cylindrical shell and a circular filter installed inside it.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) The utility model starts the second motor to drive the cam to rotate, so that the cam pushes the screening bucket back and forth under the action of the contact block. Since two sets of sleeves, sleeve rods, support blocks and springs are arranged at the right end of the screening bucket, the screening bucket is given the effect of resetting in the pushing stage, so that the screening bucket can make reciprocating motion in the screening box under the guidance of the two guide plates, and the first motor is started to drive the stirring rod to rotate, so that the stirring rod stirs the silicon carbide micropowder and drives the blocking block to rotate, forcing the blocking block to intermittently block the discharge hole of the partition plate until the silicon carbide micropowder can intermittently enter the screening bucket. Compared with the existing technology, the utility model adopts a built-in screening box and an intermittent discharge structure, which has the advantages of continuous screening, anti-blocking and anti-dust, and strong functionality.

[0016] (2) The utility model starts the dust suction fan installed on the outer wall of the powder recovery box, prompting the dust suction fan to continuously extract the air inside the powder recovery box, thereby generating a pressure difference between the powder recovery box and the screening box, and then uses an adsorption hood connected to the dust suction fan through a pipeline to absorb the silicon carbide micropowder flying inside the screening box, so that the silicon carbide micropowder entering the powder recovery box enters the dust removal filter bag detachably installed at the bottom of the powder recovery box, thereby achieving the purpose of preventing dust and reducing screening loss during the silicon carbide micropowder screening stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments.

[0018] Figure 1 This is a schematic structural diagram of a silicon carbide micropowder coarse and fine screening device proposed in the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of a silicon carbide micropowder coarse and fine screening device proposed in the utility model;

[0020] Figure 3 This is a cross-sectional view of a screening box of a silicon carbide micropowder coarse and fine screening device proposed in the utility model.

[0021] Legend:

[0022] 1. Screening box; 2. Upper opening; 3. Feed hopper; 4. First motor; 5. Feed port; 6. Second motor; 7. Powder recovery box; 8. Dust suction fan; 9. Dust filter bag; 10. Filter cover; 11. Adsorption cover; 12. Screening hopper; 13. Ultrafine filter; 14. Stirring rod; 15. Block; 16. Partition plate; 17. Feeding hole; 18. Guide plate; 19. Fine powder discharge hopper; 20. Cam; 21. Sleeve; 22. Sleeve rod; 23. Support block; 24. Spring; 25. Coarse powder discharge pipe; 26. Side opening; 27. Contact block. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0024] Please refer to Figure 1-3A silicon carbide powder coarse and fine screening device includes a screening box 1, two guide plates 18 are welded inside the screening box 1, and a screening bucket 12 is arranged between the two guide plates 18, the left end of the screening bucket 12 is embedded with an ultrafine filter 13, and the right end of the screening bucket 12 is fixedly installed with a sleeve rod 22, the outer periphery of the sleeve rod 22 is sleeved with a sleeve 21, and the sleeve 21 is fixedly connected to the inner wall of the screening box 1, one end of the sleeve rod 22 is fixedly connected to a support block 23, and the surface of the sleeve rod 22 is sleeved with a spring 24, the two ends of the spring 24 are respectively against the inner wall of the sleeve 21 and the end face of the support block 23, the screening bucket 1 2 is connected with a feed hopper 3 on the top surface, and the top of the feed hopper 3 extends to the outside of the screening box 1, and a first motor 4 is fixedly installed on the top surface of the feed hopper 3, and the output end of the first motor 4 is fixedly connected to a stirring rod 14 through a coupling, and a blocking block 15 is fixedly connected to the bottom of the stirring rod 14, a partition plate 16 is welded inside the feed hopper 3, and a discharge hole 17 is provided on the surface of the partition plate 16 corresponding to the blocking block 15, and a second motor 6 is fixedly installed on the right side of the top surface of the screening box 1, and a cam 20 is fixedly connected to the output end of the second motor 6, and a contact block 27 is abutted on the side of the cam 20, and the contact block 27 is welded to the right end face of the screening hopper 12.

[0025] In this embodiment: in order to meet the distribution needs of silicon carbide micropowder, the pore size of the ultrafine filter 13 is larger than the particle size of the coarse powder in the silicon carbide micropowder. For the first motor 4, the second motor 6 and the dust suction fan 8, the control method of the present invention is to control the manual start and stop switches. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and wiring arrangement in detail.

[0026] Specifically, a powder recovery box 7 is fixedly installed on the outer wall of the screening box 1, and the top surface of the powder recovery box 7 is connected to an adsorption cover 11 through a pipe. The adsorption cover 11 is installed at the left corner inside the screening box 1. A dust filter bag 9 is fixed to the bottom of the powder recovery box 7 by screws, and a dust suction fan 8 is installed on the side wall of the powder recovery box 7, and the dust suction port of the dust suction fan 8 is connected to the powder recovery box 7 through a filter cover 10.

[0027] In this embodiment: by starting the dust suction fan 8 installed on the outer wall of the powder recovery box 7, the dust suction fan 8 is prompted to continuously extract the air inside the powder recovery box 7, and a pressure difference is generated between the powder recovery box 7 and the screening box 1, and then the adsorption hood 11 connected to the dust suction fan 8 through a pipeline is used to absorb the silicon carbide micropowder flying inside the screening box 1, so that the silicon carbide micropowder entering the powder recovery box 7 enters the dust removal filter bag 9 detachably installed at the bottom of the powder recovery box 7, thereby realizing the "dust" recovery of the silicon carbide micropowder in the screening stage and reducing the screening loss. In order to prevent a large amount of silicon carbide micropowder from passing through the dust removal filter bag 9, the dust removal filter bag 9 adopts a double-layer filter bag structure.

[0028] Specifically, a coarse powder discharge pipe 25 is installed at an inclined position on the side of the screening bucket 12, and a columnar sealing plug is inserted into the coarse powder discharge pipe 25. The left side of the bottom surface of the screening box 1 is connected to the fine powder discharge hopper 19, and a feed port 5 is opened at the edge of the top surface of the screening bucket 12.

[0029] In this embodiment, the arrangement of the fine powder discharge hopper 19 and the coarse powder discharge pipe 25 facilitates classified discharge, and the arrangement of the feed port 5 facilitates the feeding of silicon carbide micropowder.

[0030] Specifically, an upper opening 2 is provided on the top surface of the screening box 1 corresponding to the screening bucket 12 , and a side opening 26 is provided on the side wall surface of the screening box 1 corresponding to the coarse powder discharge pipe 25 .

[0031] In this embodiment, the upper opening 2 and the side opening 26 are provided to make way for the reciprocating motion of the screening bucket 12 .

[0032] Specifically, the screening bucket 12 is a box-type structure as a whole, and an inner bottom surface of the screening bucket 12 is provided with an inclined surface.

[0033] In this embodiment, the screening bucket 12 of the box structure facilitates the screening of the silicon carbide powder. The inclined surface allows the silicon carbide powder to slide toward the ultrafine filter 13 under the action of gravity.

[0034] Specifically, a plurality of stirring columns are vertically welded to the surface of the stirring rod 14 , and the size of the block 15 of the stirring rod 14 is larger than the size of the feed hole 17 .

[0035] In this embodiment, the stirring column of the stirring rod 14 can stir the silicon carbide powder to be screened to prevent clogging.

[0036] Specifically, the filter cover 10 is composed of a cylindrical shell and a circular filter installed therein.

[0037] In this embodiment: through the setting of the filter cover 10, it is easy for the dust suction fan 8 to continuously extract the air inside the powder recovery box 7, and it can prevent the silicon carbide micropowder from entering the dust suction fan 8 and causing damage. The aperture of the circular filter screen of the filter cover 10 is the same as the aperture of the ultrafine filter screen 13.

[0038] Working principle: during operation, the silicon carbide powder to be screened is first put into the feed hopper 3. When screening, the cam 20 is driven to rotate by starting the second motor 6, so that the cam 20 pushes the screening bucket 12 back and forth under the action of the contact block 27. Since two sets of sleeves 21, sleeve rods 22, support blocks 23 and springs 24 are arranged on the right end of the screening bucket 12, the spring 24 on the surface of the sleeve rod 22 is in a compressed state during the stage when the screening bucket 12 is pushed to the left by the cam 20, so that the screening bucket 12 is in a state tending to move to the right, and the contact block 27 of the screening bucket 12 is kept in contact with the cam 20 all the time, giving the screening bucket 12 a reset effect in the pushing stage, so that the screening bucket 12 can do reciprocating motion in the screening box 1 under the guidance of the two guide plates 18, and the first motor 4 is started to drive the stirring rod 14 to rotate, so that the stirring rod 14 stirs the silicon carbide powder and drives the blocking block 15 to rotate, forcing the blocking block 15 to intermittently block the discharge hole 17 of the partition plate 16, until The silicon carbide powder can intermittently enter the screening bucket 12, and the silicon carbide powder in the screening bucket 12 enters a reciprocating motion state. The silicon carbide powder is screened through the ultrafine filter 13, and the fine powder passes through the ultrafine filter 13 and is discharged from the fine powder discharge hopper 19. The coarse powder is retained inside the screening bucket 12. When the next silicon carbide powder feeding gap comes, the columnar sealing plug in the coarse powder discharge pipe 25 is pulled out, so that the coarse powder is discharged from the discharge hopper. At the same time, by starting the outer wall of the powder recovery box 7 The installed dust suction fan 8 prompts the dust suction fan 8 to continuously extract the air inside the powder recovery box 7, generating a pressure difference between the powder recovery box 7 and the screening box 1, and then the adsorption hood 11 connected to the dust suction fan 8 through a pipeline absorbs the flying silicon carbide micropowder inside the screening box 1, so that the silicon carbide micropowder entering the powder recovery box 7 enters the dust removal filter bag 9 detachably installed at the bottom of the powder recovery box 7, thereby realizing the "dust" recovery of the silicon carbide micropowder in the screening stage and reducing the screening loss.

[0039] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A device for screening coarse and fine silicon carbide powder, comprising a screening box (1), characterized in that: Two guide plates (18) are welded inside the screening box (1), and a screening bucket (12) is provided between the two guide plates (18). An ultrafine filter (13) is embedded in the left end of the screening bucket (12), and a sleeve rod (22) is fixedly installed on the right end of the screening bucket (12). A sleeve (21) is sleeved on the periphery of the sleeve rod (22), and the sleeve (21) is fixedly connected to the inner wall of the screening box (1). One end of the sleeve rod (22) is fixedly connected to a support block (23), and a spring (24) is sleeved on the surface of the sleeve rod (22), and the two ends of the spring (24) are respectively against the inner wall of the sleeve (21) and the end face of the support block (23). The top surface of the screening bucket (12) is connected to the feed hopper (3). ), and the top of the feed hopper (3) extends to the outside of the screening box (1), the top surface of the feed hopper (3) is fixedly installed with a first motor (4), and the output end of the first motor (4) is fixedly connected to a stirring rod (14) through a coupling, and the bottom of the stirring rod (14) is fixedly connected to a blocking block (15), a partition plate (16) is welded inside the feed hopper (3), and a discharge hole (17) is provided on the surface of the partition plate (16) corresponding to the blocking block (15), a second motor (6) is fixedly installed on the right side of the top surface of the screening box (1), and a cam (20) is fixedly connected to the output end of the second motor (6), the side of the cam (20) is abutted with a contact block (27), and the contact block (27) is welded to the right end surface of the screening hopper (12).

2. The silicon carbide powder coarse and fine screening device according to claim 1, characterized in that: A powder recovery box (7) is fixedly mounted on the outer wall of the sieving box (1), and the top surface of the powder recovery box (7) is connected to an adsorption cover (11) through a pipe. The adsorption cover (11) is mounted at the left corner inside the sieving box (1). A dust filter bag (9) is fixed to the bottom of the powder recovery box (7) by screws, and a dust suction fan (8) is mounted on the side wall of the powder recovery box (7), and the dust suction port of the dust suction fan (8) is connected to the powder recovery box (7) through a filter cover (10).

3. The silicon carbide powder coarse and fine screening device according to claim 1, characterized in that: A coarse powder discharge pipe (25) is installed obliquely on the side of the screening bucket (12), and a columnar sealing plug is inserted into the coarse powder discharge pipe (25). The left side of the bottom surface of the screening box (1) is connected to a fine powder discharge hopper (19), and a feed port (5) is opened at the edge of the top surface of the screening bucket (12).

4. The silicon carbide powder coarse and fine screening device according to claim 3, characterized in that: The top surface of the screening box (1) is provided with an upper opening (2) corresponding to the screening bucket (12), and the side wall surface of the screening box (1) is provided with a side opening (26) corresponding to the coarse powder discharge pipe (25).

5. The silicon carbide powder coarse and fine screening device according to claim 1, characterized in that: The screening bucket (12) is a box-type structure as a whole, and an inclined surface is provided on the inner bottom surface of the screening bucket (12).

6. The silicon carbide powder coarse and fine screening device according to claim 1, characterized in that: A plurality of stirring columns are vertically welded on the surface of the stirring rod (14), and the size of the block (15) of the stirring rod (14) is larger than the size of the feed hole (17).

7. The silicon carbide powder coarse and fine screening device according to claim 2, characterized in that: The filter cover (10) is composed of a cylindrical shell and a circular filter screen installed therein.

Images