Graphitization product vibrating screening device

Abstract

The utility model provides a kind of graphitization product vibrating screening device, belong to graphite screening field.Solve the problem of traditional screening equipment cannot reduce the rate of plugging and high cost.It includes vibrating seat, is connected with sieve box, for with sieve box vibration;Injection assembly, is coupled with vibrating seat, for under the vibration driving of vibrating seat intermittent injection airflow;First sleeve, set in sieve box near minimum material discharge port;Built-in pipeline, inlet end is connected with injection assembly outlet end, outlet end is set in first sleeve, for when jetting form back pressure zone in first sleeve;Screen, is connected with sieve box and is located close to the back pressure zone side, wherein, every filter hole of the screen is provided with first cyclone portion and second cyclone portion along screening direction arrangement, first cyclone portion and second cyclone portion are used to form airflow of different cyclone direction.It is mainly used for graphite product screening.

Description

Technical Field

[0001] This utility model belongs to the field of graphite screening, and in particular relates to a vibrating screening device for graphitized products. Background Technology

[0002] Graphitized products, as high-end carbon materials, are widely used in lithium-ion battery anodes, conductive materials, and other fields. The graphitization process typically requires temperatures above 2000℃ to transform the random layer structure of carbon materials into a three-dimensional ordered graphite structure. However, screen clogging is a common problem during the screening of graphitized products, severely impacting production efficiency and product quality.

[0003] The main reasons for screen clogging are as follows: the high specific surface area and porous structure give graphitized products a strong adsorption capacity, making them easy to adsorb moisture and impurities in the air, resulting in adhesion between particles; the presence of polar functional groups gives the surface of graphitized products a certain degree of polarity and hydrophilicity, which enhances the interaction force between particles; and the friction between particles and the screen easily generates static electricity.

[0004] Existing screening methods cannot effectively reduce energy consumption while reducing clogging rate. Ultrasonic screening is costly and cannot be applied to coarse screening. Utility Model Content

[0005] In view of this, the present invention aims to propose a vibrating screening device for graphitized products to solve the problems of traditional screening equipment being unable to reduce the clogging rate and having high costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a vibrating sieving device for graphitization products, comprising a sieve box, including: Vibrating seat, connected to the screen box, used to vibrate with the screen box; The jet assembly, coupled to the vibrating seat, is used to intermittently jet airflow under the vibration drive of the vibrating seat; The first set of pipes is installed inside the screen box near the smallest material discharge port; The built-in pipeline has an inlet end connected to the outlet end of the injection assembly, and the outlet end is located inside the first sleeve to form a back pressure zone inside the first sleeve during jet injection. A screen, connected to a screen box and located near the back pressure zone, wherein each filter hole of the screen is provided with a first swirling section and a second swirling section arranged along the screening direction, the first swirling section and the second swirling section being used to form airflows with different swirling directions.

[0007] Furthermore, the injection assembly includes a piston rod, a cylinder, an inlet check valve, and an outlet check valve. One end of the piston rod is connected to the vibrating seat, and the other end is disposed inside the cylinder for reciprocating motion within the cylinder under the drive of the vibrating seat. An inlet check valve is provided at the inlet end of the cylinder, and an outlet check valve is provided at the outlet end.

[0008] Furthermore, the cylinder outlet end is connected to the inlet end of the built-in pipeline via a connecting part.

[0009] Furthermore, a flow-stopping part is provided at a certain distance from the back pressure zone to block the material.

[0010] Furthermore, both the first swirling section and the second swirling section include a support ring and a number of fins evenly arranged on the inner wall of the support ring.

[0011] Furthermore, the angle between the fin and the radius of the support ring is 20 degrees.

[0012] Furthermore, the fins of the first and second swirling sections face opposite directions.

[0013] Furthermore, an eccentric block is provided on the drive shaft of the screen box to generate excitation force when it rotates.

[0014] Furthermore, a sliding mass is slidably disposed on the eccentric block along the radial direction. The sliding mass is connected to an elastic element on the side away from the drive shaft, and is used to push the sliding mass against the side close to the drive shaft when in the relaxed state.

[0015] Furthermore, the eccentric block is provided with a sliding limiting part, the sliding mass part is slidably disposed in the sliding limiting part, and one end of the elastic member abuts against the inner wall of the sliding limiting part.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. This device converts a portion of the kinetic energy of the vibrating screen into gas kinetic energy, forming a flow guide zone in the area with the smallest particle size inside the vibrating screen. Combined with the vibration effect, it reduces the agglomeration effect of the packaged materials, and at the same time activates the pressure distribution and flow direction at the screen holes, thereby reducing the clogging rate. 2. This device sets up swirling components with opposite directions of rotation at the sieve holes, so that the two form a cross-shear airflow in the sieve holes, which further activates the powder in the sieve holes. Combined with the attraction of the guide zone, the powder eventually gathers downwards and will not be blocked due to the unidirectional regular movement trend of transmission vibration and agglomeration. 3. This device uses a sliding mass part inside the eccentric block to ensure that the normal operation of the eccentric block does not affect the normal operation when it rotates normally to provide excitation force. However, during the start-up and shutdown process, the position of the sliding mass part changes, forming a certain irregular vibration, which can also change the original vibration trend, help activate the powder accumulated in the screen holes, and reduce the clogging rate. Attached Figure Description

[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a side view of a vibrating sieve device for graphitized products according to the present invention. Figure 2 The present utility model Figure 1 A magnified view of part A; Figure 3 This is a top view of the sieve described in this utility model; Figure 4 The present utility model Figure 3 A magnified view of part B; Figure 5 This is a schematic diagram of the structure of the swirl section described in this utility model; Figure 6 This is a schematic diagram of the eccentric block described in this utility model; Figure 7 This is a top view of the first sleeve and the built-in pipeline described in this utility model.

[0018] Vibrating seat 1; screen 2; piston rod 3; cylinder 4; inlet check valve 5; outlet check valve 6; connecting part 7; first sleeve 8; flow stop part 9; first vortex part 10; second vortex part 11; support ring 11-1; fin 11-2; drive shaft 12; eccentric block 13; sliding mass part 14; sliding limit part 15; elastic element 16; built-in pipeline 17. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0020] It should be noted that the descriptions of "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this utility model are defined based on the orientation or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and are not intended to indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0021] In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Referring to the accompanying drawings, this embodiment describes a vibrating sieving device for graphitized products, which includes a sieve box and comprises: Vibrating seat 1, connected to the screen box, is used to vibrate with the screen box. Vibrating seat 1 connects to springs and acts as a connecting medium between the screen box and the elastic support. Depending on the actual working conditions, four vibrating seats 1 are typically set up, arranged in pairs on both sides of the screen box, with the two at different heights on each side. To ensure balanced force distribution, all four vibrating seats 1 can be coupled to the spraying assembly, or the vibrating seats 1 distributed at the same position on both sides can be coupled to the spraying assembly. The arrangement can be made reasonably according to actual needs and site limitations.

[0023] The injection assembly, coupled to the vibrating seat 1, is used to intermittently inject airflow under the vibration drive of the vibrating seat 1. The main function of the injection assembly is to convert the vibration generated by the vibrating seat 1 into intermittently injected airflow, thereby creating a guiding effect inside the screen box. At the same time, the intermittent jetting method is more conducive to reducing the clogging rate because it is not easy to form a continuous movement trend, which is conducive to forming an irregular powder movement flow field.

[0024] The first sleeve 8 is installed inside the screen box near the smallest material outlet. This arrangement is because the smallest material outlet is generally located at the bottom of the screen box, which guides the flow of material in the upper layers. The smallest particle size screen 2 is also closest to this location, further activating the powdery material and preventing clogging. The first sleeve 8 is fixed to the inner wall of the smallest material outlet hopper of the screen box using bolts and brackets.

[0025] The built-in pipe 17 has its inlet end connected to the outlet end of the jet assembly, and its outlet end is located inside the first sleeve 8. This outlet end is used to create a back pressure zone within the first sleeve 8 during jet injection. Depending on the arrangement, the built-in pipe 17 and the first sleeve 8 are at least partially coaxial, with the outlet end located inside the first sleeve 8. In this configuration, the jet from the built-in pipe 17 creates a back pressure zone within the first sleeve 8, effectively guiding the flow into the upper part of the screen box. This maintains a downward trend in the screening process, making it easier to separate large pieces of material. Simultaneously, it activates the material at the screen openings, preventing clogging.

[0026] Screen 2, connected to the screen box and located near the back pressure zone, has a first swirling section 10 and a second swirling section 11 arranged along the sieving direction in each filter hole. The first swirling section 10 and the second swirling section 11 are used to form airflows with different swirling directions. The two rotational trends create a cross-shearing effect at the screen holes, thereby breaking up the aggregated graphite powder. Combined with the guiding effect, this forms an overall downward movement trend, reducing the clogging rate.

[0027] In this embodiment, the injection assembly includes a piston rod 3, a cylinder 4, an inlet check valve 5, and an outlet check valve 6. One end of the piston rod 3 is connected to the vibrating seat 1, and the other end is located inside the cylinder 4, used for reciprocating motion within the cylinder 4 under the drive of the vibrating seat 1. The inlet end of the cylinder 4 is equipped with an inlet check valve 5, and the outlet end is equipped with an outlet check valve 6. When configured as a piston rod, a pulley is installed at one end of the piston rod, that is, the end in contact with the vibrating seat 1. When the vibrating seat 1 vibrates up and down, it transmits the reciprocating motion tendency to the piston rod 3. At this time, a spring needs to be installed inside the cylinder 4 to help the piston end of the piston rod 3 return to its original position. If no pulley is installed, the piston rod is directly connected to the vibrating seat 1, in which case the spring can be omitted. During the reciprocating motion of the piston rod 3, the pressure inside the cylinder 4 will continuously change, thereby introducing gas from the inlet check valve 5, pressurizing it, and then discharging it from the outlet check valve 6, delivering it to the built-in pipeline 17 for jetting. It should be noted that, in order to ensure the reliable operation of cylinder 4, the gas entering through the intake check valve 5 needs to be drawn from the clean area outside the factory, which can be connected using a hose of matching length. Of course, the injection assembly can also adopt other structural forms according to actual needs. Any component that can form an intermittent jet under the drive of the vibrating seat 1 can be used in this application and is also within the inventive concept of this utility model.

[0028] In this embodiment, the outlet end of the cylinder 4 is connected to the inlet end of the built-in pipeline 17 via a connecting part 7. The connecting part 7 is a flexible hose of appropriate length. It is arranged according to actual needs.

[0029] In this embodiment, a flow-stopping part 9 is provided at a certain distance from the back pressure zone to block material. The flow-stopping part 9 is provided to prevent excessive powder from passing through the first sleeve 8 and to prevent blockage within the first sleeve 8 that could lead to ejector failure. Specifically, the flow-stopping part 9 is configured as a baffle plate with an area more than four times larger than the inlet area of ​​the first sleeve 8.

[0030] In this embodiment, both the first swirling section 10 and the second swirling section 11 include a support ring 11-1 and a plurality of fins 11-2 evenly arranged on the inner wall of the support ring 11-1. The angle between the fins 11-2 and the radius of the support ring 11-1 is 20 degrees. This arrangement can form a swirling flow within the sieve holes, and the two swirling flows create a cross-shearing effect at their intersection, thereby breaking up the agglomerated graphite powder.

[0031] In this embodiment, the fins 11-2 of the first swirling section 10 and the second swirling section 11 are oriented in opposite directions. The opposite orientation of the fins helps to form swirling currents in opposite directions, thereby attracting graphite powder intended to agglomerate.

[0032] In this embodiment, an eccentric block 13 is provided on the drive shaft 12 of the sieve box to generate excitation force when rotating.

[0033] In this embodiment, a sliding mass 14 is radially slidably disposed on the eccentric block 13. The side of the sliding mass 14 away from the drive shaft 12 is connected to the elastic element 16, which is used to push the sliding mass 14 against the side close to the drive shaft 12 when in the relaxed state. A sliding limiting part 15 is disposed on the eccentric block 13, and the sliding mass 14 is slidably disposed in the sliding limiting part 15. One end of the elastic element 16 abuts against the inner wall of the sliding limiting part 15. With this arrangement, when the eccentric block 13 starts to rotate, the sliding mass 14 will gradually move towards compressing the elastic element 16 under the action of centrifugal force. When the motor stops driving the drive shaft 12, the centrifugal force decreases, and the elastic element 16 will drive the sliding mass 14 to reset. This results in the polarization force changing continuously during the start-up and shutdown phases. The brief irregular vibrations will shake down the powder already present in the sieve holes, further reducing the clogging rate. The sliding mass part 14 is specifically a slider, the elastic element 16 is a spring, and the sliding limiting part 15 is a groove. The connection method can be reasonably arranged according to the actual situation. Any technical method that is conducive to the implementation of this solution can be used in this application.

[0034] In use, the drive shaft 12 is driven by the motor to rotate. The rotation of the drive shaft 12 will drive the eccentric block 13 to rotate, forming eccentric excitation. The screen box vibrates under the support of the spring support seat. The vibration is transmitted to the spraying assembly through the vibrating seat 1 to form a jet. A back pressure zone is formed in the first sleeve 8, which forms an overall guiding effect on the screen box, helping the powder to maintain a downward movement trend, improving screening efficiency and making it less prone to clogging.

[0035] The combined swirling shearing action of the first swirling section 10 and the second swirling section 11 breaks up the agglomerated graphite powder, further reducing the clogging rate.

[0036] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A vibrating sieving device for graphitized products, comprising a sieve box, characterized in that, include: Vibrating seat (1) is connected to the screen box and is used to vibrate with the screen box; The jet assembly, coupled to the vibrating seat (1), is used to intermittently jet airflow under the vibration drive of the vibrating seat (1); The first sleeve (8) is set inside the screen box near the smallest material outlet; The built-in pipeline (17) has its inlet end connected to the outlet end of the injection assembly, and its outlet end is located inside the first sleeve (8) to form a back pressure zone inside the first sleeve (8) when the jet is applied. The screen (2) is connected to the screen box and located on the side close to the back pressure zone. Each filter hole of the screen (2) is provided with a first swirling part (10) and a second swirling part (11) arranged along the sieving direction. The first swirling part (10) and the second swirling part (11) are used to form airflows with different swirling directions.

2. The vibrating sieving device for graphitized products according to claim 1, characterized in that: The injection assembly includes a piston rod (3), a cylinder (4), an inlet check valve (5), and an outlet check valve (6). One end of the piston rod (3) is connected to the vibrating seat (1), and the other end is located inside the cylinder (4) for reciprocating motion inside the cylinder (4) under the drive of the vibrating seat (1). The cylinder (4) is provided with an inlet check valve (5) at the inlet end and an outlet check valve (6) at the outlet end.

3. The vibrating sieving device for graphitized products according to claim 2, characterized in that: The outlet end of the cylinder (4) is connected to the inlet end of the built-in pipeline (17) through the connecting part (7).

4. A vibrating sieve device for graphitized products according to claim 1, 2 or 3, characterized in that: A flow-stopping part (9) is provided near the back pressure zone to block the material.

5. The vibrating sieving device for graphitized products according to claim 4, characterized in that: The first swirling section (10) and the second swirling section (11) both include a support ring (11-1) and a number of fins (11-2) evenly arranged on the inner wall of the support ring (11-1).

6. The vibrating sieving device for graphitized products according to claim 5, characterized in that: The angle between the radius of the fin (11-2) and the support ring (11-1) is 20 degrees.

7. The vibrating sieving device for graphitized products according to claim 5, characterized in that: The fins (11-2) of the first swirling section (10) and the second swirling section (11) face opposite directions.

8. A vibrating sieve device for graphitized products according to claim 1, 2, 3, 5, 6 or 7, characterized in that: An eccentric block (13) is provided on the drive shaft (12) of the sieve box to generate excitation force when rotating.

9. A vibrating sieve device for graphitization products according to claim 8, characterized in that: The eccentric block (13) is provided with a sliding mass (14) that slides radially. The sliding mass (14) is connected to the elastic element (16) on the side away from the drive shaft (12) and is used to push the sliding mass (14) against the side close to the drive shaft (12) when in the relaxed state.

10. A vibrating sieve device for graphitization products according to claim 9, characterized in that: The eccentric block (13) is provided with a sliding limiting part (15), the sliding mass part (14) is slidably disposed in the sliding limiting part (15), and one end of the elastic member (16) abuts against the inner wall of the sliding limiting part (15).

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