A high-pressure ceramic product raw material screening device

Abstract

This utility model relates to a high-pressure ceramic product raw material screening device in the field of ceramic preparation technology, comprising: an outer shell; a screening cylinder unit inclinedly disposed within the outer shell, the screening cylinder unit including a screening section and a feeding section arranged sequentially along the material flow direction; a first spiral blade provided on the inner wall of the screening section; a driving assembly disposed within the outer shell for driving the screening cylinder unit to rotate; and a collecting unit disposed at the bottom of the outer shell; wherein, the spiral direction of the first spiral blade is opposite to the direction in which the driving assembly drives the screening cylinder unit to rotate; this utility model, by setting the spiral direction of the first spiral blade to be opposite to the driving direction of the driving assembly, causes the material to generate a reverse tumbling motion within the screening section, significantly prolonging the material residence time, achieving full dispersion and collision of particles, and improving screening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of ceramic preparation technology, and in particular to a high-pressure ceramic product raw material screening device. Background Technology

[0002] High-voltage ceramic products (such as mop pools) have stringent requirements for the purity and particle size distribution of raw materials. If impurities such as quartz particles or metal shavings are mixed into the raw materials, or if particles exceeding the specified size are present, it will directly lead to sintering deformation, decreased insulation strength, and even cracking failure in the product. Therefore, the screening process is a crucial step in the production of high-voltage ceramics.

[0003] Traditional vibrating screens rely on mechanical vibration for screening, which not only consumes a lot of energy but also has limited effectiveness in screening agglomerated materials. Furthermore, the open screening structure allows ceramic dust with a particle size <10μm to escape, resulting in dust concentrations in the working environment exceeding 8mg / m³ (GBZ 2.1-2019 limit of 1mg / m³), which endangers workers' health.

[0004] To address this, we designed a high-pressure ceramic raw material screening device. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses a high-pressure ceramic product raw material screening device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-pressure ceramic product raw material screening device, comprising:

[0008] outer shell;

[0009] A screening cylinder unit is inclinedly disposed within the outer casing. The screening cylinder unit includes a screening section and a feeding section arranged sequentially along the material flow direction. The inner wall of the screening section is provided with a first spiral blade.

[0010] A drive assembly, disposed in the outer casing, is used to drive the screening cylinder unit to rotate;

[0011] The collection unit is located at the bottom of the outer casing;

[0012] The spiral direction of the first spiral blade is opposite to the direction in which the driving assembly drives the screening cylinder unit to rotate.

[0013] Furthermore, the pitch of the first helical blade gradually decreases along the material flow direction.

[0014] Furthermore, the screening section is a conical section whose diameter gradually decreases along the material flow direction;

[0015] Furthermore, the inner wall of the feeding section is provided with a second spiral blade, and the spiral direction of the second spiral blade is opposite to that of the first spiral blade.

[0016] Furthermore, the driving component includes:

[0017] A roller support unit has an upper mounting frame, a roller support wheel and a stop wheel mounted on the upper mounting frame, the roller support wheel and the stop wheel together supporting the outer wall of the screening cylinder unit;

[0018] A drive unit has a lower mounting frame, a drive motor, and two drive gears mounted on the lower mounting frame, wherein the drive gears are drivenly connected to the drive motor.

[0019] The outer wall of the screening cylinder unit is fixedly provided with a toothed ring that meshes with the drive gear.

[0020] Furthermore, a rolling ring is fixedly provided on the upper outer wall of the screening section, and the rolling support wheel is supported on the outer ring surface of the rolling ring; a retaining edge is provided at the upper end of the rolling ring, and the stop wheel abuts against the inner end face of the retaining edge to prevent the screening cylinder unit from moving axially.

[0021] Furthermore, the toothed ring is disposed on the lower outer wall of the screening section.

[0022] Furthermore, the collection unit includes:

[0023] Collection tube;

[0024] A connecting channel connects the interior of the outer shell to the collecting cylinder;

[0025] A negative pressure pump, connected to the collection cylinder, is used to generate negative pressure inside the collection cylinder;

[0026] A filter element is installed between the collection cylinder and the negative pressure pump to filter dust that enters with the airflow and prevent dust from entering the negative pressure pump.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] 1. By setting the spiral direction of the first spiral blade to be opposite to the driving direction of the drive component, the material generates a reverse tumbling motion in the screening section, which significantly prolongs the material residence time, realizes the full dispersion and collision of particles, and improves screening efficiency.

[0029] 2. By setting the pitch of the first spiral blade to gradually decrease along the material flow direction, it adapts to the working condition of decreasing material quantity in the screening section. The large pitch at the upper end ensures smooth feeding, while the small pitch at the lower end enhances the tumbling intensity and avoids fine particle residue.

[0030] 3. By setting the screening section as a conical section (diameter decreasing from the upper end to the lower end), it can not only match the decreasing trend of material volume and maintain the uniform thickness of the material layer inside the cylinder, but also, combined with the inclined installation, form a gradient centrifugal force field, which causes large particles to migrate preferentially to the lower end, thereby improving screening accuracy.

[0031] 4. By setting a second spiral blade in the feeding section with the opposite rotation direction to the first spiral blade, the coarse material is given axial acceleration force, the discharge speed is increased, the material is effectively eliminated from the connection point, and the back-mixing of fine powder is avoided.

[0032] 5. The collection unit is designed to recover dust through a negative pressure pump and filter, which can not only collect fine materials, but also effectively suppress dust generated during screening. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of this utility model;

[0034] Figure 2 This is a cross-sectional view of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the screening cylinder unit and the drive assembly in this utility model;

[0036] Figure 4 This is a schematic diagram of the structure of the rolling support unit in this utility model;

[0037] Figure 5 This is a schematic diagram of the drive unit in this utility model.

[0038] In the diagram: 1. Outer shell; 2. Screening cylinder unit; 21. Screening section; 22. First spiral blade; 23. Feeding section; 24. Second spiral blade; 3. Rolling ring; 31. Side guard; 4. Gear ring; 5. Drive assembly; 51. Roller support unit; 511. Upper mounting frame; 512. Roller support wheel; 513. Gear wheel; 52. Drive unit; 521. Lower mounting frame; 522. Drive gear; 523. Drive motor; 6. Collection unit; 61. Collection cylinder; 62. Connecting channel; 63. Negative pressure pump; 64. Filter element. Detailed Implementation

[0039] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0040] Example 1, in conjunction with Appendix Figure 1-5 A high-pressure ceramic product raw material screening device includes an outer shell 1, a screening cylinder unit 2, a drive assembly 5, and a collection unit 6.

[0041] Outer shell 1: It adopts a sealed steel cylinder with a feed port at the top (not shown in the figure) and a slag discharge port at the bottom.

[0042] Screening cylinder unit 2: Installed at an angle inside the outer casing 1, with an inclination angle of 20° (adjustable range 15°-30°). Screening cylinder unit 2 is divided into two sections along the material flow direction:

[0043] Screening section 21: Cylindrical structure with uniformly distributed screen holes (e.g., hole diameter 0.3-0.5mm) on the cylinder wall. The inner wall is welded with a first helical blade 22 (e.g., left-handed structure), the blade height is 50mm, and the material is wear-resistant stainless steel.

[0044] Feeding section 23: Conical structure, connected to the lower end of screening section 21, with a discharge port at the end.

[0045] Driver Component 5:

[0046] Roller support unit 51: The upper mounting bracket 511 is fixed inside the outer casing 1, and two sets of roller support wheels 512 and stop wheels 513 are installed. The roller support wheels 512 are supported on the outer ring surface of the rolling ring 3 on the upper outer wall of the screening section 21; the stop wheels 513 abut against the inner side of the retaining edge 31 at the upper end of the rolling ring 3, restricting axial displacement. There are two roller support units 51, which are located on both sides of the bottom of the rolling ring 3.

[0047] Drive unit 52: The lower mounting bracket 521 is fixed to the bottom of the housing 1, and mounts the drive motor 523 (e.g., 2.2kW power) and two drive gears 522. The drive gears 522 mesh with the toothed ring 4 welded to the lower outer wall of the screening section 21. There are two drive gears 522, located on opposite sides of the bottom of the toothed ring 4.

[0048] Collection Unit 6:

[0049] The collecting cylinder 61 is connected to the bottom of the outer casing 1 via a flange connecting channel 62 (e.g., a steel pipe with a diameter of 150 mm).

[0050] A negative pressure pump 63 (e.g., vacuum degree -0.05MPa) is connected to the top of the collection cylinder 61, and a filter element 64 (e.g., PTFE filter cartridge, accuracy 1μm) is installed between the two.

[0051] Work process:

[0052] Ceramic raw materials enter the screening section 21 through the feed inlet. Under the rotation of the cylinder and the reverse action of the first spiral blade 22, the material is repeatedly tumbled and thrown, and fine particles fall into the bottom of the outer shell 1 through the screen holes. The airflow carries dust into the collection cylinder 61 through the connecting channel 62. The dust is intercepted by the filter element 64, and the clean gas is discharged by the negative pressure pump 63. The coarse material after screening is discharged through the discharge section 23.

[0053] Example 2, in conjunction with Appendix Figure 2 A high-pressure ceramic product raw material screening device differs from Embodiment 1 in that the pitch of the first spiral blade 22 is a gradually decreasing pitch. That is, the pitch of the first spiral blade 22 gradually decreases along the material flow direction to adapt to the decreasing material quantity within the screening section 21.

[0054] A second spiral blade 24 is added to the inner wall of the feeding section 23. The second spiral blade 24 rotates in the opposite direction to the first spiral blade, for example, a right-handed structure, with a constant pitch of 150mm, to accelerate the discharge of coarse material.

[0055] Example 3, in conjunction with Appendix Figure 2-3 A high-pressure ceramic product raw material screening device differs from Embodiment 1 or 2 in that the screening section 21 is a conical structure, that is, the screening section 21 is a conical section with a diameter that gradually decreases along the material flow direction (for example, the upper diameter is 500 mm and the lower diameter is 300 mm), in order to adapt to the situation where the amount of material in the screening section 21 decreases.

[0056] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A high-pressure ceramic product raw material screening device, characterized in that, include: Outer shell (1); The screening cylinder unit (2) is inclinedly disposed inside the outer shell (1). The screening cylinder unit (2) includes a screening section (21) and a feeding section (23) arranged sequentially along the material flow direction. The inner wall of the screening section (21) is provided with a first spiral blade (22). A drive assembly (5) is disposed on the outer casing (1) and is used to drive the screening cylinder unit (2) to rotate; The collection unit (6) is disposed at the bottom of the outer shell (1); The spiral direction of the first spiral blade (22) is opposite to the direction in which the driving assembly (5) drives the screening cylinder unit (2) to rotate.

2. The high-pressure ceramic product raw material screening device according to claim 1, characterized in that: The pitch of the first helical blade (22) gradually decreases along the material flow direction.

3. The high-pressure ceramic product raw material screening device according to claim 1, characterized in that: The screening section (21) is a conical section whose diameter gradually decreases along the material flow direction.

4. The high-pressure ceramic product raw material screening device according to claim 1, characterized in that: The inner wall of the feeding section (23) is provided with a second spiral blade (24), and the spiral direction of the second spiral blade (24) is opposite to that of the first spiral blade (22).

5. The high-pressure ceramic product raw material screening device according to claim 1, characterized in that: The driving component (5) includes: The roller support unit (51) has an upper mounting frame (511), a roller support wheel (512) mounted on the upper mounting frame (511), and a stop wheel (513), the roller support wheel (512) and the stop wheel (513) together supporting the outer wall of the screening cylinder unit (2); The drive unit (52) has a lower mounting bracket (521), a drive motor (523) and two drive gears (522) mounted on the lower mounting bracket (521), wherein the drive gears (522) are drivenly connected to the drive motor (523); The outer wall of the screening cylinder unit (2) is fixedly provided with a toothed ring (4) that meshes with the drive gear (522).

6. The high-pressure ceramic product raw material screening device according to claim 5, characterized in that: A rolling ring (3) is fixedly provided on the upper outer wall of the screening section (21), and the rolling support wheel (512) is supported on the outer ring surface of the rolling ring (3); the upper end of the rolling ring (3) is provided with a retaining edge (31), and the stop wheel (513) abuts against the inner end face of the retaining edge (31) to prevent the screening cylinder unit (2) from moving axially.

7. The high-pressure ceramic product raw material screening device according to claim 5, characterized in that: The toothed ring (4) is located on the lower outer wall of the screening section (21).

8. The high-pressure ceramic product raw material screening device according to claim 1, characterized in that: The collection unit (6) includes: Collection tube (61); Connecting channel (62) connects the interior of the outer shell (1) to the collecting cylinder (61); A negative pressure pump (63) is connected to the collection cylinder (61) and is used to generate negative pressure in the collection cylinder (61); A filter element (64) is disposed between the collection cylinder (61) and the negative pressure pump (63) to filter dust that enters with the airflow and prevent dust from entering the negative pressure pump (63).

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