Efficient superfine powder screening device

Abstract

The utility model provides an efficient superfine powder screening device which comprises a barrel, the barrel is a cylindrical container, a feeding channel is formed in the top of the barrel, a discharging opening is formed in the side face of the barrel, and a discharging channel is formed in the bottom of the barrel; the upper cover is detachably connected with the top of the barrel body through a flange structure, the airflow generating device comprises a fan, an air filter and at least one screen, the air filter is arranged at an air inlet of the fan, and each screen comprises an annular supporting framework and a plurality of supporting rods, the outer diameter of the annular supporting framework is matched with the inner diameter of the barrel, and a plurality of supporting columns are evenly distributed on the annular supporting framework and used for fixing the screen cloth. According to the powder screening device, multi-stage screening of powder particles can be achieved at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of powder screening devices, in particular to an efficient superfine powder screening device. BACKGROUND

[0002] In many industries such as chemical industry, pharmaceutical industry, electronics industry, food industry and material industry, powder screening devices play a crucial role. In the chemical industry, powder raw materials of different particle sizes often need to be accurately screened before entering the next chemical reaction process. For example, in the production process of catalysts, the particle size distribution of catalyst powder directly affects its catalytic efficiency. Only by accurately screening the powder that meets the particle size requirements can the performance of the final catalyst product be ensured.

[0003] Traditional screening devices are mostly based on mechanical vibration principle, which separates powder by particle size through vibrating screen. This method can still have some effect when dealing with relatively coarse particle powder, but for superfine powder, its efficiency and accuracy are greatly reduced. First, the interparticle forces of superfine powder are large, which are easy to agglomerate and difficult to effectively disperse under mechanical vibration, resulting in incomplete screening and a large amount of powder that does not meet the particle size requirements mixed into the finished product, affecting product quality. During the screening process, superfine powder is easy to produce static electricity due to its high specific surface area. Electrostatic adsorption will cause powder to adhere to the surface of the screen, block the screen holes, reduce the permeability of the screen, and thus sharply reduce the screening efficiency. Moreover, cleaning the blocked screen often requires shutdown operation, increasing production time and cost. SUMMARY

[0004] Therefore, the present application provides an efficient superfine powder screening device to solve at least one problem in the background art, which comprises:

[0005] The screening device body comprises a cylinder, which is a cylindrical container, the top of which is provided with a feeding channel, the side is provided with a discharge port, and the bottom is provided with a discharging channel;

[0006] The upper cover is detachably connected to the top of the cylinder through a flange structure, and the upper cover is located at the top end of the feeding channel,

[0007] The airflow generating device comprises,

[0008] The air outlet of the fan is connected to the air inlet of the cylinder through a pipeline, and the pipeline is provided with an air volume adjusting valve for adjusting the air flow into the cylinder;

[0009] The air filter is arranged at the air inlet of the fan for filtering the air entering the fan to prevent impurities from entering the cylinder;

[0010] At least one screen cloth, the screen cloth comprises:

[0011] An annular support framework, an outer diameter of the annular support framework is matched with an inner diameter of the cylinder, a plurality of support columns are uniformly distributed on the annular support framework, and the support columns are used for fixing the screen cloth;

[0012] The screen cloth is fixedly connected with the annular support framework through bonding and fastening screws, the screen cloth divides the cylinder into different screening areas, and the mesh number of the screen cloth gradually increases from one end to the other end;

[0013] A powder collecting device, the powder collecting device comprises:

[0014] A plurality of collecting boxes, the collecting boxes are square boxes, the plurality of collecting boxes correspond to different screening areas respectively, the collecting boxes are connected with the cylinder through the material falling channels, and sealing gaskets are arranged at the connecting positions of the material falling channels, the cylinder and the collecting boxes.

[0015] Optionally, an ion bar is arranged in the fan, and the ion bar is arranged at the air outlet of the fan.

[0016] Optionally, the powder collecting device further comprises a lock catch mechanism, and the lock catch mechanism is arranged at the connecting position of the collecting box and the material falling channel.

[0017] Optionally, the material inlet channel is further provided with a transparent observation window, and the observation window is sealingly connected with the material inlet channel through a sealing rubber strip.

[0018] Optionally, a funnel-shaped powder collecting part is arranged at the bottom of the collecting box, and an anti-static coating is arranged on the inner walls of the collecting box and the powder collecting part.

[0019] Optionally, the material inlet channel is provided with a material uniformizing device for uniformly distributing the powder entering the cylinder.

[0020] Optionally, the motor of the fan is a variable frequency motor, and the air flow intensity is controlled by adjusting the rotating speed of the fan.

[0021] Optionally, the side wall of the cylinder is provided with an inspection opening for inspecting the cylinder and the screen cloth.

[0022] Optionally, the mesh number of the screen cloth is 300-500 meshes.

[0023] Optionally, the annular support framework is driven by a servo motor.

[0024] The application has the following beneficial effects:

[0025] The application can realize efficient and accurate screening of superfine powder by cooperating airflow generating device with screen mesh with gradually changed mesh number and screen mesh structure with accurate driving. The air volume regulating valve and the variable frequency motor can flexibly adjust the airflow intensity to adapt to the screening requirements of different powders, and the gradually changed mesh number design of the screen cloth can gradually screen the powder, thereby improving the screening accuracy and efficiency.

[0026] The ion bar in the fan and the anti-static coating on the inner wall of the collection box effectively solve the problem of electrostatic adsorption of powder during screening and collection. The ion bar neutralizes the static electricity in the airflow, and the anti-static coating prevents the powder from adhering to the inside of the collection box, ensuring smooth screening and collection process, and further improving the screening efficiency and powder collection efficiency.

[0027] The observation window of the upper cover of the application facilitates real-time monitoring of the screening process by the operator, the access hole of the side wall of the cylinder facilitates maintenance and maintenance of the inside of the device, and the locking mechanism of the powder collection device ensures the stability and sealing of the connection of the collection box. These structural designs greatly improve the operation and maintenance convenience of the device.

[0028] Additional aspects and advantages of the application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings described herein are used to provide further understanding of the application, and form a part of the application. The illustrative embodiments of the application and their descriptions serve to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0030] Figure 1 is a structural schematic view of the application;

[0031] Figure 2 is a sectional view of the application;

[0032] Figure 3 is a structural schematic view of the screen mesh of the application;

[0033] Figure 4 is a structural schematic view of the feed channel of the application;

[0034] Figure 5 is a structural schematic view of the fan of the application.

[0035] Reference signs:

[0036] 1, barrel; 11, feed inlet; 12, discharge outlet; 13, blanking channel; 14, upper cover; 15, access hole; 2, said airflow generating device; 21, fan; 211, ion bar; 22, air filter; 23, screen; 24, annular support framework; 241, screen cloth; 3, collection box; 4, locking mechanism; 5, feed channel; 51, material uniformizing device; 52, observation window. DETAILED DESCRIPTION

[0037] Example embodiments of the present application will now be described in detail with reference to the accompanying drawings. Although specific implementations are described in this application, it will be understood that many modifications, variations and alternatives to the applications can be practiced by those of ordinary skill in the art. The examples described herein are presented by way of example to provide an adequate understanding of the applications disclosed herein and the scope thereof. The examples do not represent an exhaustive list of the applications described in this application, nor do they necessarily represent the only one of many identical applications which will be practiced during the life of the patent.

[0038] In the following description, numerous specific details are given to provide a thorough understanding of the applications. However, it will be apparent that the applications can be practiced without one or more of the specific details. In other instances, well-known structures are not shown in detail in order not to obscure the applications. As such, it will be understood that the applications can be practiced with modification and alteration, and that the applications are not limited to the expressly identified applications. It will be appreciated that, for simplicity and clarity of illustration, elements common between the drawings, and / or those unrelated to the current discussion, are represented by like reference numerals throughout the drawings.

[0039] In the drawings, the size of layers, regions, elements, and the like can be exaggerated for clarity. Like reference numerals refer to like elements throughout.

[0040] It should be understood that when an element or layer is referred to as being "on", "adjacent", "connected" or "coupled" to another element or layer, it can be directly on, adjacent, connected or coupled to the other element or layer or intervening elements or layers can be present. In contrast, when an element is referred to as being "directly on", "directly adjacent", "directly connected", or "directly coupled" to another element or layer, there are no intervening elements or layers present. It will be appreciated that, for simplicity and clarity, the drawings have not necessarily been drawn to scale. It should also be understood that, unless specifically stated otherwise, the drawings are solely for the purpose of illustration of the applications and should not be interpreted as the construction of limits to the applications. It should be further understood that the use of relational terms such as top and bottom, front and back, left and right, and the like are used solely to simplify the discussions and are not intended to limit the scope of the applications. It should be further understood that the specific devices and environments illustrated in the attached drawings, while being considered the best mode for the present disclosure, are provided to describe the applications more completely and are not provided to limit the scope of the applications. The applications are not limited to the specific examples described herein, but include any alternatives as would be recognized by one of ordinary skill in the art.

[0041] Spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and / or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, then a dependent element or feature described as "below" or "beneath" another element or feature would then be oriented "above" and / or "over" the other element or feature. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0042] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] For a thorough understanding of the application, detailed descriptions will be rendered by reference to specific embodiments thereof, which is shown in the following description and accompanying drawings. The preferred embodiments of the present application will be described in detail below with reference made to the drawings.

[0044] As Figures 1 to 5 shown, the embodiment of the present application provides a high-efficiency superfine powder screening device, which comprises,

[0045] The screening device body comprises a barrel 1, which is a cylindrical container, the top of which is provided with a feeding channel 5, the top end of the feeding channel being a feeding port 11, the side surface being provided with a discharge port 12, and the bottom being provided with a discharging channel 13.

[0046] An upper cover 14 is detachably connected to the top of the barrel through a flange structure, and the upper cover is located at the top end of the feeding channel and covers the feeding port.

[0047] An airflow generating device 2 comprises,

[0048] A fan 21, an air outlet of the fan is connected with an air inlet of the cylinder through a pipeline, and a wind volume adjusting valve is arranged in the pipeline to adjust the air flow entering the cylinder;

[0049] An air filter 22 is arranged at an air inlet of the fan to filter the air entering the fan and prevent impurities from entering the cylinder;

[0050] At least one screen cloth 23, which comprises:

[0051] An annular support framework 24, an outer diameter of the annular support framework is matched with an inner diameter of the cylinder, and a plurality of support columns are uniformly distributed on the annular support framework to fix the screen cloth;

[0052] A screen cloth 241 is fixedly connected with the annular support framework through bonding and fastening screws, the screen cloth divides the cylinder into different screening areas, and the mesh number of the screen cloth gradually increases from one end to the other end;

[0053] A powder collecting device, which comprises:

[0054] A plurality of collecting boxes 3, which are square boxes, correspond to different screening areas respectively, are connected with the cylinder through the material falling channels, and sealing washers are arranged at the connecting positions of the material falling channels, the cylinder and the collecting boxes.

[0055] The air flow generated by the fan enters the inside of the cylinder. For the superfine powder entering the cylinder, the air flow plays a key dispersion role. The powder is blown and suspended in the air flow under the driving of the air flow. This is because the air flow has a certain speed and pressure, which can overcome the van der waals force, friction force and the like between the powder particles, so that the powder particles that may be agglomerated together are separated from each other.

[0056] The pore sizes of the screen cloth are arranged in order from large to small according to the direction of the air flow. The powder suspended in the air flow moves towards the screen cloth under the pushing of the air flow. When the powder particles contact the screen cloth, the powder particles smaller than the pore size of the screen cloth can pass through the screen cloth under the carrying of the air flow, and the powder particles larger than the pore size of the screen cloth are intercepted by the screen cloth. In this way, through the screen cloth with different pore sizes, the powder can be classified and screened according to the particle size.

[0057] It should be noted that in the whole screening process, the air flow not only disperses the powder and realizes the particle size screening, but also transmits the screened powder to the corresponding outlet. Generally, the fine powder passing through the screen cloth moves towards the fine powder outlet under the pushing of the air flow, and the coarse powder not passing through the screen cloth moves towards the coarse powder outlet under the action of the air flow and its own gravity.

[0058] In an optional embodiment, an ion rod 211 is arranged in the fan, and the ion rod is arranged at the air outlet of the fan.

[0059] When the fan is working, the ion bar is also working, and the airflow generator continuously provides ion wind into the cylinder, thereby effectively avoiding static electricity generated in the screening process of the powder.

[0060] In an optional embodiment, the powder collecting device further comprises a lock mechanism 4 arranged at the connection between the collecting box and the material falling channel.

[0061] The collecting box and the material falling channel are connected through the lock mechanism, and the disassembly of the collecting box and the cylinder body is realized by operating the lock mechanism.

[0062] In an optional embodiment, the material inlet channel is further provided with a transparent observation window 52, which is sealingly connected with the material inlet channel through a sealing rubber strip.

[0063] By arranging the observation window, the feeding condition can be observed.

[0064] In an optional embodiment, the bottom of the collecting box is provided with a funnel-shaped powder collecting part, and the inner walls of the collecting box and the powder collecting part are provided with an antistatic coating.

[0065] The screened powder enters the corresponding collecting box through the material falling channel, and the powder collecting part at the bottom of the collecting box can better collect the powder, and the antistatic coating inside is also conducive to preventing the powder from adhering to the inner wall of the collecting box.

[0066] In an optional embodiment, the material inlet channel is provided with a uniform material device 51 for uniformly distributing the powder entering the cylinder.

[0067] It can be understood that through the action of the uniform material device, the powder in the material inlet channel uniformly enters the inside of the cylinder. In this embodiment, the uniform material device is a screen mesh driven by a vibration motor.

[0068] In an optional embodiment, the motor of the fan is a variable frequency motor, and the airflow intensity is controlled by adjusting the rotating speed of the fan.

[0069] Before starting the fan, the airflow intensity is adjusted by the air volume adjusting valve and the variable frequency motor according to the characteristics of the powder. The powder enters the cylinder from the material inlet channel and is uniformly distributed on the screen mesh under the action of the uniform material device.

[0070] The airflow drives the powder to move on the screen mesh, and the powder of different particle sizes is gradually screened on the screen cloth with gradually changing mesh number, the fine powder falls into the corresponding collecting box through the screen cloth, and the coarse powder remains on the screen mesh and is discharged through the discharge port.

[0071] In an optional embodiment, the side wall of the cylinder is provided with an inspection opening 15 for inspecting the cylinder and the screen mesh.

[0072] It can be understood that when the screening device is operated for a period of time, the mesh of the screen cloth may be blocked, and the screen cloth needs to be cleaned in time by opening the maintenance opening.

[0073] In an optional embodiment, the mesh number of the screen cloth is 300-500 mesh.

[0074] The mesh number of the screen cloth can be selected according to the diameter of the powder to be screened. In the present embodiment, the mesh number of the screen cloth is 300-500 mesh.

[0075] In an optional embodiment, the annular support framework is driven by a servo motor.

[0076] When the airflow containing the powder flows from the screen cloth, the screen cloth follows the annular support framework. Due to the centrifugal force, the powder particles are thrown to the cylinder wall and fall along the cylinder wall to the discharge channel at the bottom.

[0077] It should be understood that the above embodiments are exemplary and are not intended to include all possible embodiments included in the claims. Various modifications and changes can also be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, any combination of the technical features of the above embodiments can also be made to form additional embodiments of the present application that can not be explicitly described. Therefore, the above embodiments only express several embodiments of the present application, and do not limit the protection scope of the patent of the present application.

Claims

1. A high efficiency superfine powder sieving device, characterized in that, The application relates to a screening device, which comprises the following parts: a screening device body, which comprises a cylinder-shaped container, the top of the container is provided with a feeding channel, the side wall of the container is provided with a discharging port, and the bottom of the container is provided with a discharging channel; an upper cover, which is detachably connected with the top of the cylinder-shaped container through a flange structure, and the upper cover is located at the top end of the feeding channel, an air flow generating device, which comprises a fan, the air outlet of the fan is connected with the air inlet of the cylinder-shaped container through a pipeline, a wind volume adjusting valve is arranged in the pipeline, and the air volume entering the cylinder-shaped container is adjusted; an air filter, which is arranged at the air inlet of the fan and is used for filtering the air entering the fan to prevent impurities from entering the cylinder-shaped container; at least one screen cloth, which comprises an annular support framework, the outer diameter of the annular support framework is matched with the inner diameter of the cylinder-shaped container, a plurality of support columns are uniformly distributed on the annular support framework and are used for fixing the screen cloth, a screen cloth, which is fixedly connected with the annular support framework through adhesion and fastening screws, the screen cloth divides the cylinder-shaped container into different screening areas, and the mesh number of the screen cloth gradually increases from one end to the other end; and a powder collecting device, which comprises 2. The high efficiency superfine powder sieving device according to claim 1, characterized in that: a plurality of collecting boxes, the collecting boxes are square box bodies, the plurality of collecting boxes are respectively matched with different screening areas, and the collecting boxes are connected with the cylinder-shaped container through the discharging channel, and sealing gaskets are arranged at the connecting positions of the discharging channel, the cylinder-shaped container and the collecting boxes.

3. The high efficiency superfine powder sieving apparatus according to claim 1, wherein: An ion rod is arranged in the fan and is arranged at the air outlet of the fan.

4. The high efficiency superfine powder sieving apparatus according to claim 1, wherein: The powder collecting device further comprises a lock catch mechanism, and the lock catch mechanism is arranged at the connecting position of the collecting box and the discharging channel.

5. The high efficiency superfine powder sieving apparatus of claim 1, wherein: The feeding channel is further provided with a transparent observation window, and the observation window is sealingly connected with the feeding channel through a sealing rubber strip.

6. The high efficiency superfine powder sieving apparatus of claim 1, wherein: The bottom of the collecting box is provided with a funnel-shaped powder collecting part, and the inner walls of the collecting box and the powder collecting part are provided with anti-static coating.

7. The high efficiency superfine powder sieving apparatus of claim 1, wherein: The feeding channel is provided with a uniform material distributing device for uniformly distributing the powder entering the cylinder-shaped container.

8. The high efficiency superfine powder sieving apparatus of claim 1, wherein: The motor of the fan is a variable frequency motor, and the air flow intensity is controlled by adjusting the rotating speed of the fan.

9. The high efficiency superfine powder sieving apparatus of claim 1, wherein: The side wall of the cylinder-shaped container is provided with an inspection opening for inspecting the cylinder-shaped container and the screen cloth.

10. The high efficiency superfine powder sieving apparatus of claim 1, wherein: The mesh number of the screen cloth is 300-500 meshes. The annular support framework is driven by a servo motor.

Images