Negative pressure screening ultralight nano powder separation device

Abstract

The utility model relates to the technical field of powder processing equipment, and in particular to a negative pressure screening ultralight nano powder separation device suitable for solid electrolyte nano powder processing, comprising: a screening mechanism, which includes a rotary vibrating screen frame, a screen arranged in the rotary vibrating screen frame, and an ultrasonic generator connected to the rotary vibrating screen frame; the rotary vibrating screen frame is also provided with a feeding port and a discharging port; a filtering mechanism, which includes a microporous ceramic separator, an air outlet arranged on the microporous ceramic separator, a discharging port and a feeding port connected to the discharging port of the rotary vibrating screen frame; the feeding port is connected to the rotary vibrating screen frame; a negative pressure mechanism, which includes a vacuum pipe connected to the air outlet of the microporous ceramic separator and a vacuum pump connected to one end of the vacuum pipe away from the microporous ceramic separator. The utility model can improve the screening efficiency of nano-level ultrafine and ultralight powders.

Description

Technical Field

[0001] The utility model relates to the technical field of powder processing equipment, in particular to a negative pressure screening ultralight nano powder separation device suitable for solid electrolyte nano powder processing. Background Art

[0002] The rotary vibrating screen is a high-precision fine powder screening machine with low noise and high efficiency. It is suitable for screening and filtering of materials such as particles, powders, and mucus. The rotary vibrating screen uses an upright motor as the excitation source. Eccentric weights are installed at the upper and lower ends of the motor to convert the motor's rotational motion into horizontal, vertical, and inclined three-dimensional motion, and then transmit this motion to the screen surface. By adjusting the phase angles at the upper and lower ends, the motion trajectory of the material on the screen surface can be changed.

[0003] The ultrasonic rotary vibrating screen is a device that combines an ultrasonic generator, a screening aid and a screen. The ultrasonic rotary vibrating screen generally used in the prior art is to install a high-frequency, low-amplitude ultrasonic vibrator on the screen. The ultra-fine powder is subjected to huge ultrasonic acceleration, so that the material on the screen surface always remains in a suspended state, and is used for screening fine powders. At the same time, by installing a flat scraper, the agglomerated materials on the screen that do not meet the particle size requirements are continuously ground and crushed in the shell until they meet the requirements and are squeezed under the screen by the flat scraper, so as to avoid the screen surface being blocked by larger particles for a long time. The scraper is generally a brush or a whole silicone scraper or a combination of a brush and a silicone scraper.

[0004] Through actual research, it is found that when the ultrasonic rotary vibrating screen involved in the above-mentioned public technology is screening 400 mesh or above nano-level ultra-fine and ultra-light solid electrolyte powders, due to the light weight of the powder, it is difficult to obtain sufficient gravity to pass through the mesh holes, resulting in low screening efficiency of such powders; and because of its large specific surface area, it is easy to absorb moisture in the air. After running on the screen for a long time and being squeezed by the scraper, the nano powders will block the holes on the screen, further reducing the screening efficiency. In addition, during the operation of the rotary vibrating screen, a large amount of dust is easily generated on the screen, which is suspended and adhered to the top cover and other parts, causing environmental pollution and material loss.

[0005] Therefore, for solid electrolyte nano-scale ultrafine powders, the ultrasonic rotary vibrating screen used in the existing screening technology has some insurmountable problems. Especially for the screening needs of ultra-light and ultra-fine solid electrolyte nanopowders, it is necessary to design a new and targeted screening system solution. Utility Model Content

[0006] The utility model aims to provide a negative pressure separation device for screening ultralight nano powders, so as to solve the technical problem of optimizing the screening effect of the ultralight nano powders.

[0007] The negative pressure screening ultralight nano powder separation device of the utility model is realized as follows:

[0008] A negative pressure separation device for ultralight nano powders, comprising:

[0009] The screening mechanism comprises a rotary vibrating screen frame, a screen arranged in the rotary vibrating screen frame, and an ultrasonic generator connected to the rotary vibrating screen frame; the rotary vibrating screen frame is also provided with a feeding port and a discharging port;

[0010] The filtering mechanism comprises a microporous ceramic separator, an air outlet and a material outlet arranged on the microporous ceramic separator, and a material inlet connected to a material outlet of a rotary vibration screen frame;

[0011] The negative pressure mechanism comprises a vacuum pipe connected to the gas outlet of the microporous ceramic separator and a vacuum pump connected to one end of the vacuum pipe away from the microporous ceramic separator.

[0012] In an optional implementation of the present invention, the microporous ceramic separator is provided with a microporous ceramic filter element; and

[0013] The material outlet and the material inlet are both located on one side of the microporous ceramic filter element, and the air outlet is located on the other side of the microporous ceramic filter element.

[0014] In an optional implementation of the present invention, the microporous ceramic filter element comprises a first filter ring and at least one second filter ring connected by a connecting column; wherein

[0015] The second filter ring and the connecting column are detachably assembled.

[0016] In an optional implementation of the present invention, the thickness of the first filter ring along the axial direction of the connecting column is greater than the thickness of the second filter ring; and

[0017] The outer diameter of the first filter ring is the same as the outer diameter of the second filter ring.

[0018] In an optional implementation of the present invention, a plurality of weight-reducing holes are provided in the first filter ring.

[0019] In an optional implementation of the present invention, the microporous ceramic separator is formed with a cylindrical cavity for adapting to the outer diameter of the first filter ring; and

[0020] The microporous ceramic separator is also provided with a rotating shaft connected to the connecting column for driving the microporous ceramic filter element to rotate in the columnar cavity;

[0021] The rotating shaft is connected to a driving motor arranged outside the microporous ceramic separator.

[0022] In an optional implementation of the present invention, a scraper for scraping the microporous ceramic filter element is further provided in the columnar cavity and on the side of the microporous ceramic filter element facing the discharge port and the feed port.

[0023] In an optional implementation of the utility model, a "cross"-shaped flat scraper for scraping the screen is also provided in the rotary vibration screen frame and above the screen;

[0024] The "cross" shaped flat scraper is provided with a detachably assembled flexible scraper.

[0025] In an optional implementation of the utility model, the "cross"-shaped flat scraper is connected to a driving structure for driving it to perform rotational motion.

[0026] In an optional implementation of the present invention, a slag discharge port is further provided on the side wall of the rotary vibrating screen frame and above the screen.

[0027] By adopting the above technical scheme, the utility model has the following beneficial effects: the negative pressure screening ultralight nano powder separation device of the utility model is an important component of the industrial production of solid electrolyte nano powder, and is of great significance to the solid electrolyte nano powder separation technical scheme. It connects the microporous ceramic separator and the vacuum pump through the rotary vibrating screen frame, and uses the vacuum effect generated by the vacuum pump to form a negative pressure environment in the microporous ceramic separator and the rotary vibrating screen frame, so that the material powder floating on the upper part of the screen is adsorbed on the surface of the screen and passes through the screen under the action of negative pressure; the dust generated on the screen is reduced, and the dust suspended and adhered to the top cover and other parts of the rotary vibrating screen frame falls off due to pressure, and is collected after being filtered through the screen, reducing the pollution to the environment and the loss of materials.

[0028] Furthermore, the rotating motion of the "cross" flat scraper designed on the screen exerts downward force on the powder suspended on the upper part of the screen, and the mechanical vibration generated by the ultrasonic generator separates the mesh, so that the ultra-light powder stuck on the mesh can pass through the screen more quickly. And the "cross" flat scraper can crush the nano powder that has aggregated into a sphere while rotating, and redistribute it evenly, greatly improving the screening efficiency of nano-level ultra-fine and ultra-light powders. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The figure shows the overall structure schematic diagram of the negative pressure separation device for ultra-light nano powders of the utility model;

[0030] Figure 2 The figure shows a schematic diagram of the structure of a "cross"-shaped flat scraper of the separator of the utility model for negative pressure screening of ultralight nano powders;

[0031] Figure 3The figure shows a schematic structural diagram of a microporous ceramic filter element of a separation device for negative pressure screening of ultralight nano powders according to the utility model from a first perspective;

[0032] Figure 4 Shown is a second perspective structural schematic diagram of the microporous ceramic filter element of the separation device for negative pressure screening of ultralight nano powders of the present invention.

[0033] In the figure: a rotary vibrating screen frame 1, a screen 2, a "cross"-shaped flat scraper 3, a flexible scraper 4, a motor 5, a feeding port 6, a slag discharge port 7, a connecting pipe 8, an ultrasonic generator 9, a feeding port 10, an air outlet 11, a microporous ceramic separator 12, a driving motor 13, a scraper 14, a microporous ceramic filter element 15, a discharge valve 16, a receiving tank 17, a vacuum pipe 18, a vacuum pump 19, a discharge port 20, an outlet 21, a first filter ring 151, a second filter ring 152, a connecting column 153, and a weight reduction hole 155. DETAILED DESCRIPTION

[0034] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0035] See also Figures 1 to 4 As shown, this embodiment provides a separation device for negative pressure screening of ultralight nanopowders, including: a screening mechanism, a filtering mechanism and a negative pressure mechanism used in conjunction with each other, the three being connected in sequence through pipelines, that is, the filtering mechanism is located between the negative pressure mechanism and the screening mechanism.

[0036] Next, the screening mechanism is described in detail, which includes a rotary vibrating screen frame 1, a screen 2 arranged in the rotary vibrating screen frame 1, and an ultrasonic generator 9 connected to the rotary vibrating screen frame 1; the rotary vibrating screen frame 1 is also provided with a feeding port 6 and a discharging port 20. The feeding port 6 is arranged above the screen 2, and the discharging port is arranged below the screen 2, so that the material put onto the screen 2 through the feeding port 6 is screened by the screen 2 and then discharged through the discharging port 20. The ultrasonic generator 9 is used to transmit ultrasonic waves to the screen 2. Here, the mesh of the screen 2 can be selected to be 400-500 meshes.

[0037] On the basis of the above structure, a "cross" flat scraper 3 for scraping the screen 2 is further provided in the rotary vibration screen frame 1 and above the screen 2; a detachably assembled flexible scraper 4 is provided on the "cross" flat scraper 3. The flexible scraper 4 here can be made of, for example, but not limited to, silicone or rubber.

[0038] The cross-shaped flat scraper 3 is connected with a driving structure for driving it to rotate. The driving structure here adopts, for example, but not limited to, a motor 5, which is connected to the cross-shaped flat scraper 3 through a rotating shaft.

[0039] In addition, it should be noted that a slag discharge port 7 is provided on the side wall of the rotary vibration screen frame 1 and above the screen 2. The material particles that cannot be crushed or cannot pass through the screen 2 are discharged through the slag discharge port 7.

[0040] Next, the filtering mechanism includes a microporous ceramic separator 12, an air outlet 11, a material outlet 21 and a material inlet 10 provided on the microporous ceramic separator 12; wherein the material inlet 10 is connected to the material discharge port 20 of the rotary vibration screen frame 1 through a connecting pipe 8. The air outlet 11 is used to connect the negative pressure mechanism. The material outlet 21 is connected to the material receiving tank 17, and a discharge valve 16 is arranged between the material outlet 21 and the material receiving tank 17.

[0041] Furthermore, a microporous ceramic filter element 15 is provided in the microporous ceramic separator 12; and the discharge port and the feed port 10 are both located on one side of the microporous ceramic filter element 15, and the gas outlet 11 is located on the other side of the microporous ceramic filter element 15. Here, through the design of the ceramic micropores, when the rotary vibrating screen frame 1 and the microporous ceramic separator 12 form an internal environment of negative pressure under the action of the negative pressure mechanism, the microporous ceramic filter element 15 can prevent the material from entering the negative pressure mechanism, so that the material entering the microporous ceramic separator 12 can only enter the receiving tank 17 through the discharge port 21.

[0042] Next, a specific optional implementation is given as an example with reference to the accompanying drawings. The microporous ceramic filter element 15 includes a first filter ring 151 and at least one second filter ring 152 connected by a connecting column 153. In this embodiment, two second filter rings 152 are used, and the number of second filter rings 152 can be adjusted in combination with different usage situations. In order to facilitate the adjustment of the number of second filter rings 152, the second filter ring 152 and the connecting column 153 are detachable and assembled.

[0043] It should be noted that the filtration accuracy of the microporous ceramic filter element 15 used in this embodiment is 0.3-0.6 microns, and a suitable microporous ceramic filter element 15 can be selected according to the conditions of the nano-powder material.

[0044] Based on the above situation, an optional situation is given in conjunction with the attached drawings. The thickness of the first filter ring 151 along the axial direction of the connecting column 153 is greater than the thickness of the second filter ring 152; and the outer diameter of the first filter ring 151 is the same as the outer diameter of the second filter ring 152. It should be noted that the filtering principle of the first filter ring 151 and the second filter ring 152 of this embodiment can be any mature microporous ceramic filtering principle in the prior art, and the filtering principle will not be repeated in this embodiment.

[0045] In order to prevent the first filter ring 151 from being too heavy, a plurality of weight-reducing holes 155 are provided in the first filter ring 151. It should be noted that the weight-reducing holes 155 here are not through holes extending along the axial direction of the connecting column 153, but are only countersunk holes. In conjunction with the accompanying drawings, the first filter ring 151 in this embodiment faces the side of the discharge port and the feed port 10, which means that the weight-reducing holes 155 will not extend to the side end surface of the first filter ring 151 facing the discharge port and the feed port 10.

[0046] It should also be noted that the microporous ceramic separator 12 is formed with a cylindrical cavity for adapting to the outer diameter of the first filter ring 151. Sliding friction is formed between the outer circumferential surfaces of the first filter ring 151 and the second filter ring 152 and the inner wall of the cylindrical cavity, thereby preventing materials from passing between the two.

[0047] Based on the above structure, in an optional implementation, this embodiment further has the following design:

[0048] First, the microporous ceramic separator 12 is also provided with a rotating shaft connected to the connecting column 153 for driving the microporous ceramic filter element 15 to rotate in the columnar cavity; the rotating shaft is connected to the driving motor 13 arranged outside the microporous ceramic separator 12. Furthermore, a scraper 14 for scraping the microporous ceramic filter element 15 is also provided in the columnar cavity and on the side of the microporous ceramic filter element 15 facing the discharge port and the feed port 10. Here, the scraper 14 is designed to scrape off the material attached to the end face of the microporous ceramic filter element 15 facing the discharge port due to the vacuum pressure, so as to keep the gas flow smooth.

[0049] Finally, the negative pressure mechanism is described, which includes a vacuum pipe 18 connected to the gas outlet 11 of the microporous ceramic separator 12 and a vacuum pump 19 connected to one end of the vacuum pipe 18 away from the microporous ceramic separator 12. The vacuum pump 19 is connected to the gas outlet 11 of the microporous ceramic separator 12 through the vacuum pipe 18.

[0050] In summary, for the negative pressure screening ultralight nano powder separation device of this embodiment, its specific use process is as follows:

[0051] S1 preparation operation: first start the ultrasonic generator 9, then start the motor 5 connected to the "cross" flat scraper 3 to drive the "cross" flat scraper 3 to operate, and at the same time drive the flexible scraper 4 on the "cross" flat scraper 3 to rotate, install the material receiving tank 17 under the discharge valve, start the vacuum pump 19, and after the vacuum pump 19 is started, keep the lower part of the screen 2 and the inside of the microporous ceramic separator 12 in a negative pressure state, and finally close the discharge valve 16 at the bottom of the microporous ceramic separator 12.

[0052] S2 screening operation: the powder material to be screened is put into the feed material from the upper part of the rotary vibrating screen frame 1. Under the action of the "cross" flat scraper 3, ultrasonic vibration and negative pressure, the powder material adheres to the upper surface of the screen 2, so that the ultra-light nano fine powder quickly passes through the screen 2 and finally enters the microporous ceramic separator 12, while the powder material that cannot be crushed and pass through the screen 2 is discharged from the slag discharge port, and the gas entering with the fine powder is filtered by the microporous ceramic filter element 15 in the microporous ceramic separator 12 and then discharged through the vacuum pump 19 along the vacuum pipe 18.

[0053] S3 Fine powder collection: After a period of screening and collection, turn off the vacuum pump 19, turn on the drive motor 13 on the microporous ceramic separator 12, and then open the discharge valve 16 at the bottom of the microporous ceramic separator 12, so that the material in the microporous ceramic separator 12 enters the receiving tank 17, pour out the fine powder, reinstall the lower part of the discharge valve 16, close the bottom discharge valve 16 again, turn off the drive motor 13 on the microporous ceramic separator 12, and turn on the vacuum pump 19 to continue screening. Repeat the operation to repeatedly pour out the fine powder.

[0054] This embodiment forms a negative pressure environment through the triple effects of the "cross" flat scraper 3, the ultrasonic generator 9 and the vacuum pump 19, which not only allows the material to remain adsorbed on the upper surface of the screen 2, but also enables the ultra-light and ultra-fine powder to enter and pass through the mesh of the screen 2 more quickly by giving the material an external force through the screen 2, ultrasonic mechanical vibration and vacuum negative pressure absorption, thereby greatly improving the screening efficiency of such materials.

[0055] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0056] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A negative pressure separation device for ultralight nano powders, characterized in that: include: The screening mechanism comprises a rotary vibrating screen frame, a screen arranged in the rotary vibrating screen frame, and an ultrasonic generator connected to the rotary vibrating screen frame; the rotary vibrating screen frame is also provided with a feeding port and a discharging port; The filtering mechanism comprises a microporous ceramic separator, an air outlet and a material outlet arranged on the microporous ceramic separator, and a material inlet connected to a material outlet of a rotary vibration screen frame; The negative pressure mechanism comprises a vacuum pipe connected to the gas outlet of the microporous ceramic separator and a vacuum pump connected to one end of the vacuum pipe away from the microporous ceramic separator.

2. The negative pressure screening ultralight nano powder separation device according to claim 1, characterized in that: The microporous ceramic separator is provided with a microporous ceramic filter element; and The material outlet and the material inlet are both located on one side of the microporous ceramic filter element, and the air outlet is located on the other side of the microporous ceramic filter element.

3. The negative pressure screening ultralight nano powder separation device according to claim 2, characterized in that: The microporous ceramic filter element comprises a first filter ring and at least one second filter ring connected by a connecting column; wherein The second filter ring and the connecting column are detachably assembled.

4. The negative pressure screening ultralight nano powder separation device according to claim 3, characterized in that: The thickness of the first filter ring along the axial direction of the connecting column is greater than the thickness of the second filter ring; and The outer diameter of the first filter ring is the same as the outer diameter of the second filter ring.

5. The negative pressure screening ultralight nano powder separation device according to claim 4, characterized in that: The first filter ring is provided with a plurality of weight-reducing holes.

6. The negative pressure screening ultralight nano powder separation device according to claim 3 or 4, characterized in that: The microporous ceramic separator is formed with a cylindrical cavity adapted to fit the outer diameter of the first filter ring; and The microporous ceramic separator is also provided with a rotating shaft connected to the connecting column for driving the microporous ceramic filter element to rotate in the columnar cavity; The rotating shaft is connected to a driving motor arranged outside the microporous ceramic separator.

7. The negative pressure screening ultralight nano powder separation device according to claim 6, characterized in that: A scraper for scraping the microporous ceramic filter element is also provided in the columnar cavity and on one side of the microporous ceramic filter element facing the discharge port and the feed port.

8. The negative pressure screening ultralight nano powder separation device according to claim 1, characterized in that: A "cross"-shaped flat scraper for scraping the screen is also provided in the rotary vibration screen frame and above the screen; The "cross" shaped flat scraper is provided with a detachably assembled flexible scraper.

9. The negative pressure screening ultralight nano powder separation device according to claim 8, characterized in that: The "cross"-shaped flat scraper is connected with a driving structure for driving it to perform rotational motion.

10. The negative pressure screening ultralight nano powder separation device according to claim 1, characterized in that: A slag discharge port is also provided on the side wall of the rotary vibration screen frame and above the screen.

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