Feeding device for silicon nitride production

Abstract

The utility model provides a feeding device for silicon nitride production, which relates to the field of silicon nitride production and comprises feeding racks, a silicon nitride bin and a spiral conveying cylinder, the feeding racks are distributed on the left side and the right side of the silicon nitride bin, and the spiral conveying cylinder is arranged at the lower end of the silicon nitride bin. Limiting lifting plates are connected into an inner side groove of the feeding rack in a penetrating mode and symmetrically fixed to the left side face and the right side face of the silicon nitride stock bin, the upper end faces of the limiting lifting plates make contact with reset springs through extrusion columns, hydraulic columns are attached to the lower end faces of the limiting lifting plates, and a transparent bin cover is inserted into the groove wall of the upper end of the silicon nitride stock bin. A feeding cover plate is installed on the upper surface of the transparent bin cover in a hinged mode. The feeding device solves the problem that in the prior art, a pushing plate is difficult to push and move a small amount of stacked raw materials to a discharging port of a hopper, and feeding residues are caused.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon nitride production, in particular to a feeding device for silicon nitride production. Background Art

[0002] Silicon nitride powder is the main raw material for making silicon nitride ceramics and related products. Silicon nitride powder has high mechanical strength, small thermal expansion coefficient and good thermal conductivity, so it is widely used in real life. At present, the main preparation methods for making silicon nitride powder include direct nitridation of silicon powder, carbothermal reduction method, thermal decomposition method, sol-gel method, chemical vapor deposition and self-propagating high-temperature synthesis method, etc. After retrieval, in the prior art (publication number: CN202320386164.7), a feeding device for the preparation of silicon nitride powder is disclosed. It is recorded in the text that "by setting the material discharging mechanism in the utility model, the main gear can be driven to rotate by the meshing tooth bar at the bottom, so as to drive the connecting ring to rotate. And the two pushing plates on the top of the connecting ring can drive the raw materials accumulated around the hopper to the position of the discharging port in the rotating state, which is convenient for the raw materials to enter the feeding machine to achieve the feeding effect. At the same time, the pushing plates can provide a certain mixing ability to improve the quality of the raw materials". However, in the prior art, it is difficult for the pushing plates to push the accumulated raw materials with a small amount to the discharging port of the hopper, resulting in the problem of residual feeding. Content of the Utility Model

[0003] In order to overcome the defects existing in the prior art, the present utility model provides a feeding device for silicon nitride production to solve the problem that in the prior art, it is difficult for the pushing plates to push the accumulated raw materials with a small amount to the discharging port of the hopper, resulting in the problem of residual feeding.

[0004] To achieve the above object, a feeding device for silicon nitride production is provided, including: a feeding machine frame, a silicon nitride silo and a spiral feeding cylinder. The feeding machine frame is distributed on the left and right sides of the silicon nitride silo, and the spiral feeding cylinder is arranged at the lower end of the silicon nitride silo.

[0005] A limiting lifting plate is connected through the inner groove of the feeding machine frame, and the limiting lifting plate is symmetrically fixed on the left and right side surfaces of the silicon nitride silo. The upper end surface of the limiting lifting plate contacts a return spring through a pressing column, and the lower end surface of the limiting lifting plate is attached to a hydraulic cylinder. A transparent silo cover is inserted into the upper end groove wall of the silicon nitride silo, and a feeding cover plate is hingedly installed on the upper surface of the transparent silo cover.

[0006] Furthermore, a fixing plate is welded on the upper end surface of the feeding machine frame, and a motor is installed on the upper surface of the fixing plate. The transparent silo cover is screwed on the front and rear side surfaces of the fixing plate.

[0007] Furthermore, a rotating column is axially connected to the lower end of the motor, and a scraper is screwed and fixed to the side end of the rotating column through a spring support. The scraper is symmetrically attached to the inner wall of the silicon nitride silo.

[0008] Furthermore, a stirring column is fixed to the lower end face of the rotating column, and the transparent bin cover is sleeved in a circular ring shape at the upper bin opening of the silicon nitride bin.

[0009] Furthermore, a discharge opening is provided at the lower end face of the silicon nitride bin; and the discharge opening is directly opposite to the notch on the upper cylindrical surface of the spiral feeding cylinder.

[0010] Furthermore, a return spring is connected to the upper end of the inner groove of the feeding frame, and an elastic shock pad is embedded and fixed on the lower groove wall of the inner side of the feeding frame; and the elastic shock pad is located below the limit lifting plate.

[0011] Furthermore, the feeding frame, the limit lifting plate, the hydraulic cylinder, the return spring and the extrusion column constitute a linear vibration mechanism of the silicon nitride bin.

[0012] The beneficial effects of the present utility model are as follows. The feeding device for silicon nitride production of the present utility model connects the feeding frame and the silicon nitride bin by using the limit lifting plate, and the limit lifting plate is pushed up and down by the hydraulic cylinder and the return spring to make the silicon nitride bin vibrate linearly, so as to vibrate and discharge the residual raw materials in the silicon nitride bin, which is convenient for the silicon nitride raw materials to be fed fully and thoroughly. At the same time, it is convenient for the silicon nitride feeding device to feed continuously and stably, avoiding the phenomena of agglomeration, blockage and sticking of the fed silicon nitride raw materials, improving the feeding effect of the silicon nitride feeding device. The transparent bin cover inserted at the upper end of the silicon nitride bin effectively blocks the dust overflow of the silicon nitride raw materials and reduces the loss in the silicon nitride feeding link. Brief Description of the Drawings

[0013] Figure 1 It is a front view structural schematic diagram of the feeding device for silicon nitride production according to an embodiment of the present utility model.

[0014] Figure 2 It is a front view sectional structural schematic diagram of the feeding device for silicon nitride production according to an embodiment of the present utility model.

[0015] Figure 3 It is a front view sectional structural schematic diagram of the silicon nitride bin according to an embodiment of the present utility model.

[0016] Figure 4 It is a top view structural schematic diagram of the feeding frame according to an embodiment of the present utility model.

[0017] In the figure: 1. Feeding frame; 11. Fixed plate; 12. Limit lifting plate; 13. Hydraulic cylinder; 14. Return spring; 15. Extrusion column; 16. Elastic shock pad; 2. Silicon nitride bin; 21. Discharge opening; 3. Spiral feeding cylinder; 4. Stirring column; 41. Scraper; 42. Motor; 43. Rotating column; 44. Spring support; 5. Transparent bin cover; 51. Feeding cover plate. Detailed Description of the Embodiment

[0018] Next, in combination with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0019] Referring to Figures 1 to 4 As shown, the present utility model provides a feeding device for silicon nitride production, including: a feeding frame 1, a silicon nitride silo 2, and a spiral feeding cylinder 3. The feeding frame 1 is distributed on the left and right sides of the silicon nitride silo 2, and a spiral feeding cylinder 3 is arranged at the lower end of the silicon nitride silo 2.

[0020] A limiting lifting plate 12 is connected through the inner groove of the feeding frame 1. The limiting lifting plates 12 are symmetrically fixed on the left and right side surfaces of the silicon nitride silo 2. A return spring 14 is contacted by the upper end surface of the limiting lifting plate 12 through a pressing column 15, and a hydraulic column 13 is attached to the lower end surface of the limiting lifting plate 12. A transparent bin cover 5 is inserted into the upper groove wall of the silicon nitride silo 2, and a feeding cover plate 51 is hinged and installed on the upper surface of the transparent bin cover 5.

[0021] During use, the hydraulic column 13 pushes up the limiting lifting plate 12 to squeeze the return spring 14, and then the return spring 14 pushes down the limiting lifting plate 12 to fall, performing a reciprocating motion to drive the silicon nitride silo 2 to vibrate up and down. At the same time, the scraper 41 and the stirring column 4 in the silicon nitride silo 2 rotate to ensure that the raw materials in the silicon nitride silo 2 do not agglomerate, become blocked, or stick to the bin during the feeding process. The raw materials in the silicon nitride silo 2 are vibrated and discharged into the spiral feeding cylinder 3, and then transported to the processing equipment through the spiral feeding cylinder 3 to produce silicon nitride, thus completing the feeding process.

[0022] In this embodiment, a fixing plate 11 is welded on the upper end surface of the feeding frame 1. A motor 42 is installed on the upper surface of the fixing plate 11, and the transparent bin cover 5 is screwed on the front and rear side surfaces of the fixing plate 11. The lower end of the motor 42 is axially connected with a rotating column 43. A scraper 41 is screwed and fixed on the side end of the rotating column 43 through a spring support 44. The scrapers 41 are symmetrically attached to the inner wall of the silicon nitride silo 2. A stirring column 4 is fixed on the lower end surface of the rotating column 43, and the transparent bin cover 5 is circularly covered on the upper bin opening of the silicon nitride silo 2.

[0023] As a preferred implementation manner, the motor 42 drives the scraper 41 and the stirring column 4 to rotate, scraping and mixing or stirring the silicon nitride raw materials on the inner wall of the silicon nitride silo 2 to prevent the silicon nitride raw materials from agglomerating. The transparent bin cover 5 is convenient for blocking the outflow of the raw materials in the silicon nitride silo 2, and at the same time, it avoids the silicon nitride raw materials being exposed to the external environment, thus avoiding affecting the quality of the silicon nitride raw materials.

[0024] In this embodiment, a discharge opening 21 is provided at the lower end face of the silicon nitride silo 2; and the discharge opening 21 is directly opposite to the notch on the upper cylindrical surface of the spiral feeding cylinder 3.

[0025] As a preferred implementation manner, the silicon nitride raw material is discharged into the spiral feeding cylinder 3 through the discharge opening 21 of the silicon nitride silo 2, and is conveyed to the production and processing equipment through the spiral feeding cylinder 3.

[0026] In this embodiment, a return spring 14 is connected to the upper end of the inner groove of the feeding frame 1, and an elastic shock pad 16 is embedded and fixed on the lower groove wall of the inner side of the feeding frame 1; and the elastic shock pad 16 is located below the limit lifting plate 12.

[0027] As a preferred implementation manner, the force generated by the upward deformation of the return spring 14 under the extrusion of the extrusion column 15 is used to push the limit lifting plate 12 downward. The elastic shock pad 16 supports and buffers the impact force of the falling of the limit lifting plate 12 on the feeding frame 1. The hydraulic column 13 is used to assist in pushing the limit lifting plate 12 upward and then quickly retracting.

[0028] In this embodiment, the feeding frame 1, the limit lifting plate 12, the hydraulic column 13, the return spring 14 and the extrusion column 15 constitute a linear vibration mechanism of the silicon nitride silo 2.

[0029] As a preferred implementation manner, the linear vibration mechanism of the silicon nitride silo 2 facilitates driving the silicon nitride silo 2 to vibrate up and down, facilitating the full and thorough feeding of the silicon nitride raw material. At the same time, it facilitates the continuous and stable feeding of the silicon nitride feeding device, avoiding phenomena such as agglomeration, blockage, and sticking of the fed silicon nitride raw material, and the structure of the linear vibration mechanism is simple, and disassembly and replacement are relatively simple.

[0030] The feeding device for silicon nitride production of the present utility model can effectively solve the problem in the prior art that the pushing plate is difficult to push the relatively small amount of piled raw materials to the discharge opening of the hopper, resulting in residual feeding. It facilitates the full and thorough feeding of the silicon nitride raw material. At the same time, it facilitates the continuous and stable feeding of the silicon nitride feeding device, avoiding phenomena such as agglomeration, blockage, and sticking of the fed silicon nitride raw material, improving the feeding effect of the silicon nitride feeding device, and is applicable to the feeding device for silicon nitride production.

[0031] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A feeding device for silicon nitride production, comprising: A feeding frame (1), a silicon nitride silo (2) and a spiral feed barrel (3), wherein the feeding frame (1) is distributed on the left and right sides of the silicon nitride silo (2), and a spiral feed barrel (3) is arranged at the lower end of the silicon nitride silo (2), characterized in that: A limit lifting plate (12) is connected through the inner groove of the feeding frame (1), and the limit lifting plate (12) is symmetrically fixed on the left and right sides of the silicon nitride bin (2). The upper end surface of the limit lifting plate (12) contacts a return spring (14) through an extrusion column (15), and the lower end surface of the limit lifting plate (12) is attached to a hydraulic column (13). A transparent bin cover (5) is inserted into the groove wall at the upper end of the silicon nitride bin (2), and a feed cover plate (51) is hingedly mounted on the upper surface of the transparent bin cover (5).

2. A feeding device for silicon nitride production according to claim 1, characterized in that: A fixing plate (11) is welded to the upper end surface of the loading frame (1), a motor (42) is mounted on the upper surface of the fixing plate (11), and a transparent bin cover (5) is screwed to the front and rear sides of the fixing plate (11).

3. A feeding device for silicon nitride production according to claim 2, characterized in that: The lower end of the motor (42) is axially connected to a rotating column (43), and a scraper (41) is screwed and fixed to the side end of the rotating column (43) via a spring support (44), and the scraper (41) is symmetrically attached to the inner wall of the silicon nitride silo (2).

4. A feeding device for silicon nitride production according to claim 3, characterized in that: A stirring column (4) is fixed to the lower end surface of the rotating column (43), and the transparent bin cover (5) is annularly shaped and connected to the upper bin opening of the silicon nitride bin (2).

5. A feeding device for silicon nitride production according to claim 1, characterized in that: The lower end surface of the silicon nitride material bin (2) is provided with a material discharge port (21); and the material discharge port (21) is directly opposite to the notch on the upper surface of the spiral feed cylinder (3).

6. A feeding device for silicon nitride production according to claim 1, characterized in that: A return spring (14) is connected to the upper end of the inner groove of the loading frame (1), and an elastic shock-isolating pad (16) is embedded and fixed in the inner lower groove wall of the loading frame (1); and the elastic shock-isolating pad (16) is located below the limit lifting plate (12).

7. A feeding device for silicon nitride production according to claim 1, characterized in that: The loading frame (1), the limiting lifting plate (12), the hydraulic column (13), the return spring (14) and the extrusion column (15) constitute a linear vibration mechanism of the silicon nitride silo (2).

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