Screening device
By using a combination of vibration sensors and ultrasonic generators in the screening device, the clogging problem when screening wet and dusty materials is solved, improving screening efficiency and accuracy, and reducing maintenance costs.
Patent Information
- Application Number
- CN202522488201.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-24
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-24
AI Technical Summary
Screening devices are prone to clogging when screening dusty materials with high moisture content, resulting in reduced screening efficiency and inaccurate particle size distribution.
Vibration sensors are used to detect screen vibration information, and control components are used to control ultrasonic generators to provide high-frequency mechanical vibration. This, combined with the vibration of the gyratory screen, disperses the aggregated material and prevents the screen holes from clogging.
It effectively prevents screen hole clogging, improves screening efficiency and the accuracy of grading, reduces downtime and maintenance time, and reduces labor intensity.
Smart Images
Figure CN224926475U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material screening technology, and in particular to a screening device. Background Technology
[0002] In the production processes of chemical, pharmaceutical, and food industries, precise grading and particle size separation of powdered or granular materials is required. Gyratory screens have become a widely used screening device due to their advantages such as high screening efficiency, large throughput, and minimal material damage. Especially in the production process of adsorbents (such as 4A and 5A molecular sieves), gyratory screens are used to screen products such as matrix spheres.
[0003] However, in practical applications, when the material to be screened has a high moisture content, especially during the screening process of the first coarse screen of the screening device, due to the characteristics of damp and dusty materials that are prone to agglomeration, the material often clogs the screen holes of the coarse screen when it enters the gyratory screen, causing poor feeding and screening, resulting in a sharp drop in screening efficiency, reduced processing capacity, and affecting the accuracy of the particle size distribution of the final product. Utility Model Content
[0004] One of the technical problems to be solved by this utility model is: how to improve the screening ability of screening devices for dusty materials with high moisture content.
[0005] To address the aforementioned technical problems, this utility model provides a screening device, comprising: a gyratory screen, which includes a coarse screen and at least one layer of screen disposed below the coarse screen, the gyratory screen being configured to be driven to vibrate for grading and screening materials; a vibration sensor for detecting vibration information of the coarse screen; an ultrasonic generator assembly connected to the coarse screen to provide high-frequency mechanical vibration to the coarse screen; and a control element communicatively connected to the vibration sensor and the ultrasonic generator assembly, configured to control the start / stop and output power of the ultrasonic generator assembly based on the information received from the vibration sensor.
[0006] In some embodiments, the ultrasonic generating assembly includes an ultrasonic power supply and an ultrasonic transducer; the ultrasonic power supply is configured to provide a high-frequency electrical signal to the ultrasonic transducer, and the ultrasonic transducer is configured to convert the high-frequency electrical signal into high-frequency mechanical vibration and is rigidly connected to the coarse screen.
[0007] In some embodiments, the coarse screen is detachably mounted inside the gyratory screen via a screen frame.
[0008] In some embodiments, the gyratory screen further includes a medium screen located below the coarse screen and a fine screen located below the medium screen.
[0009] In some embodiments, the ultrasonic generating component is also connected to the middle screen to provide high-frequency mechanical vibration to the middle screen.
[0010] In some embodiments, the gyratory screen is provided with a feed inlet located above the coarse screen and a discharge outlet located below the coarse screen.
[0011] In some embodiments, the gyratory screen is provided with a feed inlet located above the coarse screen and a discharge outlet located below the coarse screen.
[0012] In some embodiments, an elastic sealing sleeve is provided at the connection between the discharge pipeline and the discharge port and / or at the connection between the discharge pipeline and the storage cylinder.
[0013] In some embodiments, the screening device further includes a dust removal fan and a dust removal duct connecting the dust removal fan and the gyratory screen.
[0014] In some embodiments, the dust removal duct is an elastic corrugated pipe.
[0015] Through the above technical solution, the screening device provided by this utility model, when materials that have clumped together due to moisture enter the gyratory screen and accumulate above the coarse screen, the vibration sensor detects changes in the vibration information of the coarse screen. The control element controls the ultrasonic generator to provide high-frequency mechanical vibration to the coarse screen, which, together with the vibration of the gyratory screen itself, effectively disperses the clumps of dust materials, avoids clogging the screen holes, facilitates subsequent grading and screening, and improves the screening efficiency and grading accuracy of the screening device. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of the screening device according to an embodiment of the present utility model; Figure 2 This is a partial cross-sectional schematic diagram showing the coarse screen in an embodiment of the present invention.
[0018] Explanation of reference numerals in the attached figures: 1. Gyratory screen; 11. Coarse screen; 12. Screen frame; 13. Medium screen; 14. Fine screen; 15. Discharge port; 2. Vibration sensor; 3. Ultrasonic generator assembly; 31. Ultrasonic power supply; 32. Ultrasonic transducer; 4. Discharge pipeline; 5. Storage cylinder; 6. Elastic sealing sleeve; 7. Dust removal fan; 8. Dust removal pipeline. Detailed Implementation
[0019] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to exemplarily illustrate the principles of this utility model, but should not be used to limit the scope of this utility model. This utility model can be implemented in many different forms and is not limited to the specific embodiments described herein, but includes all technical solutions falling within the scope of the claims.
[0020] These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values set forth in these embodiments should be interpreted as merely exemplary and not as limiting.
[0021] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0022] Furthermore, the terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.
[0023] It should also be noted that, in the description of this utility model, unless otherwise explicitly 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.
[0024] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.
[0025] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.
[0026] like Figure 1 and Figure 2 As shown, this utility model provides a screening device, including: a gyratory screen 1, which includes a coarse screen 11 and at least one layer of screen disposed below the coarse screen 11, the gyratory screen 1 being configured to be driven to vibrate for grading and screening materials; a vibration sensor 2, which is connected to the coarse screen 11 to detect the vibration information of the coarse screen 11; an ultrasonic generator 3, which is connected to the coarse screen 11 to provide high-frequency mechanical vibration to the coarse screen 11; and a control element, which is communicatively connected to the vibration sensor 2 and the ultrasonic generator 3, and is configured to control the start / stop and output power of the ultrasonic generator 3 according to the information received from the vibration sensor 2.
[0027] Specifically, the gyratory screen 1 used in this invention is a commercially available gyratory screen. Its working principle involves a drive motor driving an eccentric shaft located at the bottom of the gyratory screen 1, causing the various levels of screen meshes in the gyratory screen 1 to gyrate horizontally, vertically, and inclined, thus evenly dispersing the material on the screen meshes and allowing for precise grading. However, due to the tendency of dusty materials to agglomerate when damp, when clumps of material fall onto the uppermost coarse screen mesh 11 inside the gyratory screen 1, they can clog the screen holes, leading to poor material flow and affecting the screening efficiency and accuracy of the device. Therefore, this invention uses a vibration sensor 2 to detect the vibration information (such as vibration frequency and amplitude) of the coarse screen mesh 11, and coordinates with control components to determine whether screen hole clogging has occurred. For example, when the vibration amplitude of the coarse screen 11 received by the control element attenuates to below 80% of the set threshold, it is determined that the coarse screen 11 is clogged. The ultrasonic generating component 3 is then controlled to provide high-frequency mechanical vibration to the coarse screen 11 for a certain duration (e.g., 3 minutes). The high-frequency mechanical vibration (usually greater than 20kHz) of the ultrasonic generating component 3 overcomes the adhesion between the screen holes and the material, and between the material itself, breaking up the aggregated dust material, thereby eliminating the clogging phenomenon. In other embodiments, the control element can also adjust the output power of the ultrasonic generating component 3 according to the attenuation of the vibration amplitude of the coarse screen 11 to improve the clogging removal efficiency of the coarse screen 11. This utility model, through the vibration sensor 2 installed on the coarse screen 11, the ultrasonic generating component 3 that provides high-frequency mechanical vibration to the coarse screen 11, and the control element connected in series with the former two, effectively solves the clogging problem during the screening of dust materials with high moisture content, reduces the time loss and labor intensity caused by frequent shutdowns and disassembly and cleaning of the screen, and significantly improves the screening capacity of the screening device.
[0028] like Figure 1 and Figure 2 As shown, in some embodiments, the ultrasonic generating component 3 includes an ultrasonic power supply 31 and an ultrasonic transducer 32; the ultrasonic power supply 31 is configured to provide a high-frequency electrical signal to the ultrasonic transducer 32, and the ultrasonic transducer 32 is configured to convert the high-frequency electrical signal into high-frequency mechanical vibration and is rigidly connected to the coarse screen 11.
[0029] Specifically, the ultrasonic power supply unit 31 is located outside the gyratory screen 1 and is connected to the ultrasonic transducer 32 located inside the gyratory screen 1 via a shielded cable. The ultrasonic power supply unit 31 converts conventional power frequency electricity into a high-frequency electrical signal, which is transmitted to the ultrasonic transducer 32 through the shielded cable. The ultrasonic transducer 32 then converts the received high-frequency electrical signal into a high-frequency mechanical wave and transmits it to the coarse screen 11, which is rigidly connected to it, thereby breaking up the agglomerated material. Both the ultrasonic power supply unit 31 and the ultrasonic transducer 32 here use commercially available ultrasonic equipment.
[0030] In some embodiments, to enhance the effect of the ultrasonic generating component 3, a plurality of ultrasonic transducers 32 are provided on the coarse screen 11. The plurality of ultrasonic transducers 32 are arranged in a ring around the center of the coarse screen 11 and installed at the bottom of the coarse screen 11. Since the material enters the gyratory screen 1 from the center, the center of the coarse screen 11 is most prone to the accumulation of wet material. By arranging the plurality of ultrasonic transducers 32 in a ring around the center, the high-frequency mechanical vibration can form a superposition effect at the center, thereby effectively breaking up the accumulated material.
[0031] like Figure 2 As shown, in some embodiments, the coarse screen 11 is detachably installed inside the gyratory screen 1 via the screen frame 12. Specifically, the screen frame 12 can be bolted inside the gyratory screen 1, allowing operators to quickly and independently replace the screen during routine maintenance, significantly reducing maintenance time and labor intensity, and effectively ensuring the efficient and continuous operation of the equipment.
[0032] like Figure 1 As shown, in some embodiments, the gyratory screen 1 further includes a medium screen 13 located below the coarse screen 11 and a fine screen 14 located below the medium screen 13. Specifically, the screen aperture size of each level of screen inside the gyratory screen 1 decreases layer by layer from top to bottom to perform material grading and screening.
[0033] like Figure 1 As shown, in some embodiments, the ultrasonic generating component 3 is also connected to the middle screen 13 to provide high-frequency mechanical vibration to the middle screen 13.
[0034] Specifically, to prevent the material dispersed after passing through the coarse screen 11 from re-aggregating on the intermediate screen 13, an ultrasonic transducer 32 is installed at the bottom of the intermediate screen 13. The control element can be configured to provide high-frequency mechanical vibration to the coarse screen 11 for a certain period of time based on the vibration information from the vibration sensor 2, and then provide high-frequency mechanical vibration to the intermediate screen 13 for a certain period of time, ensuring that the material passes smoothly through the coarse screen 11 and the intermediate screen 13 in sequence. In other embodiments, a vibration sensor 2 can also be installed separately on the intermediate screen 13 to allow the control element to determine the blockage status on the intermediate screen 13.
[0035] like Figure 1 As shown, in some embodiments, the gyratory screen 1 is provided with a feed inlet located above the coarse screen 11 and a discharge outlet 15 located below the coarse screen 11.
[0036] Specifically, the feed inlet is typically positioned directly above the center of the coarse screen 11 to facilitate material entry into the gyratory screen 1 for gyratory screening. For example... Figure 1As shown, the gyratory screen 1 has two discharge ports 15, corresponding to the medium screen 13 and the fine screen 14 respectively, so as to collect materials of different particle size grades after screening. The remaining material on the coarse screen 11 can be collected after the screen frame 12 is removed.
[0037] like Figure 1 As shown, in some embodiments, the screening device further includes a discharge pipeline 4 connected to the discharge port 15 and a storage cylinder 5 disposed at the end of the discharge pipeline 4.
[0038] Specifically, the upper end of the discharge pipeline 4 can be sealed and connected to the discharge port 15 via a flange connection or quick clamp. Its body can be made of stainless steel or engineering plastic and extends downwards at a certain angle to form a closed material transport channel. The end of the discharge pipeline 4 is connected to a storage cylinder 5 for collecting and temporarily storing qualified materials separated by the gyratory screen 1, facilitating subsequent packaging or other processing. In other embodiments, an observation window can be provided on the discharge pipeline 4 to facilitate observation of the material flow.
[0039] like Figure 1 As shown, in some embodiments, an elastic sealing sleeve 6 is provided at the connection between the discharge pipeline 4 and the discharge port 15 and / or at the connection between the discharge pipeline 4 and the storage cylinder 5.
[0040] Specifically, the elastic sealing sleeve 6 can be made of high-molecular elastic materials such as rubber, silicone, or polyurethane. Its two ends are connected to the discharge port 15 and the upper end of the discharge pipeline 4 by means of stainless steel clamps or flanges, and / or are set in the same way between the end of the discharge pipeline 4 and the inlet of the storage cylinder 5. With the elastic deformation capability of the elastic sealing sleeve 6, the vibration generated by the gyratory screen 1 during operation is effectively absorbed, and the displacement between the gyratory screen 1 and the relatively stationary discharge pipeline 4 and storage cylinder is compensated, which effectively improves the reliability and service life of the screening device.
[0041] like Figure 1 As shown, in some embodiments, the screening device further includes a dust removal fan 7 and a dust removal pipe 8 connecting the dust removal fan 7 and the gyratory screen 1.
[0042] Specifically, the top of the gyratory screen 1 is equipped with a dust extraction port. The dust removal fan 7 is fixedly installed on the outside of the gyratory screen 1 by a bracket, and its inlet is sealed to the dust extraction port through a dust removal pipe 8. During operation, the dust removal fan 7 is started to create a stable negative pressure environment inside the gyratory screen 1 through the dust removal pipe 8, effectively sucking out the dust generated during the screening process from the screening area of the material for collection and treatment. This inhibits the diffusion of dust inside the gyratory screen 1 and its escape into the workshop environment, improves the air quality in the working area, and protects the health of the operators.
[0043] In some embodiments, the dust collection duct 8 is an elastic corrugated pipe. Specifically, the dust collection duct 8 is an elastic corrugated pipe made of metal (such as stainless steel, galvanized steel) or high-performance engineering plastics (such as polypropylene, polyvinyl chloride). During installation, both ends of the elastic corrugated pipe are sealed to the dust suction port on the gyratory screen 1 and the inlet of the dust collection fan 7 respectively through pipe clamps or flange joints. During operation, its own elastic deformation effectively absorbs and compensates for the displacement and installation errors caused by the working vibration of the gyratory screen 1, ensuring the reliability and stability of the dust collection operation over a long period of time.
[0044] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions described herein based on the above description.
[0045] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.
Claims
1. A screening device, characterized in that, include: A gyratory screen (1) includes a coarse screen (11) and at least one layer of screen disposed below the coarse screen (11). The gyratory screen (1) is configured to be driven to vibrate in order to classify and screen materials. Vibration sensor (2), the vibration sensor (2) is connected to the coarse screen (11) to detect the vibration information of the coarse screen (11); An ultrasonic generating component (3) is connected to the coarse screen (11) to provide high-frequency mechanical vibration to the coarse screen (11). A control element is communicatively connected to the vibration sensor (2) and the ultrasonic generator assembly (3), and is configured to control the start / stop and output power of the ultrasonic generator assembly (3) based on information received from the vibration sensor (2).
2. The screening device according to claim 1, characterized in that, The ultrasonic generating component (3) includes an ultrasonic power supply (31) and an ultrasonic transducer (32). The ultrasonic power supply (31) is configured to provide a high-frequency electrical signal to the ultrasonic transducer (32), and the ultrasonic transducer (32) is configured to convert the high-frequency electrical signal into high-frequency mechanical vibration and is rigidly connected to the coarse screen (11).
3. The screening device according to claim 1, characterized in that, The coarse screen (11) is detachably installed inside the gyratory screen (1) via the screen frame (12).
4. The screening device according to claim 1, characterized in that, The swing screen (1) also includes a medium screen (13) located below the coarse screen (11) and a fine screen (14) located below the medium screen (13).
5. The screening device according to claim 4, characterized in that, The ultrasonic generating component (3) is also connected to the middle screen (13) to provide high-frequency mechanical vibration to the middle screen (13).
6. The screening device according to claim 1, characterized in that, The gyratory screen (1) is provided with a feed inlet located above the coarse screen (11) and a discharge outlet (15) located below the coarse screen (11).
7. The screening device according to claim 6, characterized in that, The screening device also includes a discharge pipeline (4) connected to the discharge port (15) and a storage cylinder (5) located at the end of the discharge pipeline (4).
8. The screening device according to claim 7, characterized in that, An elastic sealing sleeve (6) is provided at the connection between the discharge pipeline (4) and the discharge port (15) and / or at the connection between the discharge pipeline (4) and the storage cylinder (5).
9. The screening device according to claim 1, characterized in that, The screening device also includes a dust removal fan (7) and a dust removal pipe (8) connecting the dust removal fan (7) and the swing screen (1).
10. The screening device according to claim 9, characterized in that, The dust removal pipe (8) is an elastic corrugated pipe.