Impurity removing and screening device for silicon carbide powder

Abstract

The utility model relates to the technical field of silicon carbide powder impurity removal, in particular to a silicon carbide powder impurity removal screening device which comprises a flowing air channel and a feeding seat, one end of the feeding seat is fixedly connected with an air expansion cover, one end of the air expansion cover is provided with a material receiving valve seat, and the top of the flowing air channel is movably connected with a top frame. And the bottom end of the flowing air duct is fixedly connected with a material receiving frame. According to the silicon carbide powder impurity removing and screening device, due to the arrangement of the flowing air channel, the feeding seat, the air expanding cover, the material receiving valve seat, the top frame, the flowing frame, the conical screening frame and the screening net groove, the silicon carbide powder can be continuously and efficiently removed and screened, and in actual use, a worker firstly connects a pipeline for conveying silicon carbide powder raw materials to the material receiving valve seat of the air expanding cover; and then the flowing silicon carbide powder rapidly enters the interior of the flowing air duct from the feeding seat under the action of airflow, and at the moment, the silicon carbide powder in the flowing air duct can continuously penetrate through the flowing frame at the bottom of the top frame.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon carbide powder impurity removal, in particular to a silicon carbide powder impurity removal and screening device. Background Art

[0002] Silicon carbide is an inorganic substance made from quartz sand, petroleum coke, sawdust and other raw materials through high-temperature smelting in a resistance furnace. Silicon carbide is a semiconductor that exists in nature in the form of the extremely rare mineral moissanite. It has been mass-produced as powder and crystals and used as abrasives, etc. Among non-oxide high-tech refractory raw materials such as C, N, and B, silicon carbide is the most widely used and economical one, and its production requires impurity removal and screening operations.

[0003] For example, a patent document with publication number CN 110314849 A discloses a silicon carbide powder impurity removal and screening device, comprising a feed box, a filter box, an oscillating screen, a control box and a cloth bag, wherein a filter box is provided at the rear of the feed box, and an oscillating screen is provided directly below the feed box, the oscillating screen and the feed box are connected through a cloth bag, and a control box is provided below the filter box; the present invention solves the problem that the existing oscillating screen can only screen out large particles in the silicon carbide powder when removing impurities from the silicon carbide powder, while small particles of impurities often cannot be purified, thereby resulting in low purity of the silicon carbide powder, thereby affecting the overall quality of the silicon carbide powder. By improving the silicon carbide powder impurity removal and screening device, the silicon carbide powder impurity removal and screening device can effectively purify the silicon carbide powder, and facilitate the classification and screening of silicon carbide.

[0004] However, when this structure is used for impurity removal and screening of silicon carbide powder, the silicon carbide powder raw material is often blocked on the filter, which causes the overall screening efficiency of the equipment to gradually slow down, requiring periodic filter cleaning and maintenance operations. At the same time, the equipment is unable to quickly separate and collect the screened silicon carbide powder, and then perform efficient internal filter cleaning and maintenance operations, which cannot meet daily use needs. Therefore, it is urgent to design a silicon carbide powder impurity removal and screening device to solve the above problems. Summary of the invention

[0005] The purpose of the utility model is to provide a silicon carbide powder impurity removal and screening device to solve the problem that the existing structure proposed in the above background technology, when used for silicon carbide powder impurity removal and screening, often causes the silicon carbide powder raw material to be blocked on the filter, resulting in the overall screening efficiency of the equipment gradually slowing down, requiring staged filter cleaning and maintenance operations, and at the same time, the equipment is unable to quickly separate and collect the screened silicon carbide powder, and then perform efficient internal filter cleaning and maintenance operations, and cannot meet daily use needs.

[0006] To achieve the above object, the utility model provides the following technical solution: a silicon carbide powder impurity removal and screening device, comprising a flow duct, one end of which is fixedly connected to a feed seat, one end of which is fixedly connected to an air diffuser, and one end of which is provided with a material receiving valve seat;

[0007] A top frame and a material receiving frame, wherein the top of the flow air duct is movably connected to the top frame, and the bottom end of the flow air duct is fixedly connected to the material receiving frame.

[0008] Preferably, the bottom end of the side of the material receiving rack is evenly provided with a material extraction valve opening, and the interior of the material receiving rack is evenly fixedly connected with a partition plate.

[0009] Preferably, the bottom end of the top frame is evenly and fixedly connected with a flow frame, and positioning strips are provided on the sides between the flow frames.

[0010] Preferably, a sealing ring is provided at the bottom edge of the top frame, and the sealing ring is adapted to the surface of the flow duct.

[0011] Preferably, a conical screening frame is arranged inside the flow frame, and a screening mesh groove is arranged on the inner wall of the conical screening frame.

[0012] Preferably, clamping strips are provided on both sides of the inner wall of the flow duct, and the inner bottom wall of the flow duct is evenly provided with material conveying grooves.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The silicon carbide powder impurity removal and screening device can make the silicon carbide powder continuously and efficiently during impurity removal and screening by means of the arranged flow air duct, feed seat, air expansion hood, material receiving valve seat, top frame, flow frame, conical screening frame and screening mesh slot. In actual use, the staff first connects the pipeline for conveying the silicon carbide powder raw material to the material receiving valve seat of the air expansion hood, and then the flowing silicon carbide powder quickly enters the interior of the flow air duct from the feed seat under the action of the airflow. At this time, the silicon carbide powder inside the flow air duct can continuously pass through the flow frame at the bottom of the top frame, and then pass through the screening mesh slots at the conical screening frame of different calibers inside the flow frame to quickly screen and separate the silicon carbide powder. At this time, the design of the conical screening frame inside the flow frame can make the silicon carbide powder continue to screen and flow even when the screening mesh slot is blocked by the screening, thereby realizing a more efficient and continuous screening operation of the silicon carbide powder raw material, which reflects the practicality of the equipment design.

[0015] The silicon carbide powder impurity removal and screening device further improves the overall use effect of the equipment by arranging the flow air duct, top frame, material receiving frame, material extraction valve port, partition plate, positioning strip, sealing ring, clamping strip and material feed trough. In daily use, after the silicon carbide powder impurity removal and screening in the flow air duct is completed for a period of time, the silicon carbide powder transportation through the air expansion hood and the material receiving valve seat at the feed seat is stopped, so that the silicon carbide powder at the conical screening frame and the screening mesh slot inside all the flow frames loses the lateral blowing force, and then flows out to the material feed trough of the flow air duct along the conical screening frame under the action of gravity, and is finally separated and stored by the partition plate inside the material receiving frame. At the same time, the top frame can be positioned and connected with the flow air duct and the clamping strips on both sides of the inner wall through the positioning strip and the sealing ring. The overall disassembly and assembly stability is improved, and cleaning and maintenance operations are convenient, which reflects the comprehensiveness of the equipment design. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0017] Figure 2 It is an overall schematic diagram of the flow duct structure of the utility model;

[0018] Figure 3 It is an overall schematic diagram of the top frame structure of the utility model;

[0019] Figure 4 It is an overall schematic diagram of the material receiving rack structure of the utility model.

[0020] In the figure: 1. flow air duct; 2. feed seat; 3. air expansion hood; 4. material receiving valve seat; 5. top frame; 6. material receiving frame; 7. material extraction valve port; 8. partition plate; 9. flow frame; 10. positioning strip; 11. sealing ring; 12. conical screening frame; 13. screening mesh slot; 14. clamping strip; 15. material conveying trough. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 , an embodiment provided by the utility model:

[0023] A device for removing impurities and screening of silicon carbide powder comprises a flow duct 1, one end of the flow duct 1 is fixedly connected to a feed seat 2, one end of the feed seat 2 is fixedly connected to an air diffuser hood 3, one end of the air diffuser hood 3 is provided with a material receiving valve seat 4, a conical screening frame 12 is provided inside the flow frame 9, the inner wall of the conical screening frame 12 is provided with a screening mesh slot 13, clamping strips 14 are provided on both sides of the inner wall of the flow duct 1, and a feeding trough 15 is evenly opened on the inner bottom wall of the flow duct 1. After the silicon carbide powder is removed and screened for a period of time inside the flow duct 1, the silicon carbide powder is stopped from being transported through the air diffuser 3 and the material receiving valve seat 4 at the feed seat 2, so that the silicon carbide powder at the conical screening frame 12 and the screening mesh slot 13 inside all the flow frames 9 loses the lateral blowing force, and then flows out to the feeding trough 15 of the flow duct 1 along the conical screening frame 12 under the action of gravity.

[0024] The top frame 5 and the material receiving frame 6, the top of the flow air duct 1 is movably connected to the top frame 5, the bottom end of the flow air duct 1 is fixedly connected to the material receiving frame 6, the side bottom end of the material receiving frame 6 is evenly provided with a material extraction valve port 7, the inside of the material receiving frame 6 is evenly fixedly connected with a partition plate 8, the bottom end of the top frame 5 is evenly fixedly connected to the flow frame 9, the side between the flow frames 9 is provided with a positioning strip 10, the bottom edge of the top frame 5 is provided with a sealing ring 11, the sealing ring 11 is adapted to the surface of the flow air duct 1, the silicon carbide powder inside the flow air duct 1 can continuously pass through the flow frame 9 at the bottom of the top frame 5, and then pass through the screening mesh slots 13 at the conical screening frames 12 of different calibers inside the flow frame 9 to quickly screen and separate the silicon carbide powder.

[0025] Working principle: When in use, the user first connects the pipeline for conveying silicon carbide powder raw materials to the material receiving valve seat 4 of the air expansion hood 3, and then the flowing silicon carbide powder quickly enters the interior of the flow air duct 1 from the feed seat 2 under the action of the airflow. At this time, the silicon carbide powder inside the flow air duct 1 can continuously pass through the flow rack 9 at the bottom of the top rack 5, and then pass through the screening mesh slots 13 at the conical screening racks 12 of different calibers inside the flow rack 9 to quickly screen and separate the silicon carbide powder. At this time, the design of the conical screening rack 12 inside the flow rack 9 can enable the silicon carbide powder to continue to screen and flow when the screening mesh slots 13 are blocked by the screening, thereby realizing a more efficient and continuous screening operation of the silicon carbide powder raw materials. In daily use During the process, after the silicon carbide powder impurity removal and screening inside the flow duct 1 is completed for a period of time, the transportation of silicon carbide powder through the air expansion hood 3 and the receiving valve seat 4 at the feed seat 2 is stopped, so that the silicon carbide powder at the conical screening frame 12 and the screening mesh slot 13 inside all the flow frames 9 loses the lateral blowing power, and then flows out along the conical screening frame 12 to the feed trough 15 of the flow duct 1 under the action of gravity, and finally is separated and stored by the partition plate 8 inside the receiving frame 6. At the same time, the daily top frame 5 can be positioned and connected with the flow duct 1 and the clamping strips 14 on both sides of the inner wall through the positioning strips 10 and the sealing ring 11, so as to improve the overall disassembly and assembly stability and facilitate cleaning and maintenance operations. The above is the entire working principle of the utility model.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A device for removing impurities from silicon carbide powder, comprising a flow duct (1), characterized in that: One end of the flow air duct (1) is fixedly connected to a feed seat (2), one end of the feed seat (2) is fixedly connected to an air diffuser hood (3), and one end of the air diffuser hood (3) is provided with a material receiving valve seat (4); A top frame (5) and a material receiving frame (6), wherein the top of the flow air duct (1) is movably connected to the top frame (5), and the bottom of the flow air duct (1) is fixedly connected to the material receiving frame (6).

2. The device for removing impurities from silicon carbide powder according to claim 1, characterized in that: The bottom end of the side of the material receiving frame (6) is evenly provided with material extraction valve openings (7), and the interior of the material receiving frame (6) is evenly fixedly connected with partition plates (8).

3. The device for removing impurities from silicon carbide powder according to claim 1, characterized in that: The bottom end of the top frame (5) is evenly and fixedly connected to a flow frame (9), and positioning strips (10) are provided on the sides between the flow frames (9).

4. The device for removing impurities from silicon carbide powder according to claim 1, characterized in that: A sealing ring (11) is provided at the bottom edge of the top frame (5), and the sealing ring (11) is adapted to the surface of the flow duct (1).

5. The device for removing impurities from silicon carbide powder according to claim 3, characterized in that: A conical screening frame (12) is arranged inside the flow frame (9), and a screening mesh groove (13) is arranged on the inner wall of the conical screening frame (12).

6. The device for removing impurities from silicon carbide powder according to claim 1, characterized in that: Clamping strips (14) are provided on both sides of the inner wall of the flow air duct (1), and material conveying grooves (15) are evenly provided on the inner bottom wall of the flow air duct (1).

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