A rapid classifying screen for producing feed

Abstract

The utility model relates to the technical field of screening equipment, concretely relates to a kind of quick classification screen for producing feed, including vibrating screening mechanism and cyclone separator, vibrating screening mechanism includes shell and base, shell is connected between base by elastic member, vibrating motor is installed on shell, upper layer screen and lower layer screen are installed in the inside of shell, first discharge outlet corresponding with upper layer screen upper side side is opened in shell, second discharge outlet corresponding with lower layer screen upper side is opened in shell, the third discharge outlet is opened in the bottom of shell;Cyclone separator includes body and fan, body is located below vibrating screening mechanism, body includes inlet pipeline, cyclone chamber, outlet pipeline and fourth discharge outlet, inlet pipeline top and third discharge outlet are communicated.This application vibrating screening mechanism classifies and processes coarse particle, cyclone separator classifies and processes fine particle, different feed characteristics are considered, and the problem that single technology cannot adapt to multiple types of materials is solved.

Description

Technical Field

[0001] This utility model relates to the field of screening equipment technology, specifically to a rapid grading screen for feed production. Background Technology

[0002] In the feed production sector, grading screens are core equipment, and their performance directly determines product quality and production efficiency. Currently, the mainstream feed grading screens on the market mainly use single vibrating screening or airflow classification technology, but these technologies have significant limitations.

[0003] Vibrating screens rely on the screen mesh size to separate materials. However, due to the limitations of the screen mesh screening principle, it is difficult to guarantee the separation accuracy of fine particles. For example, when processing fine particles such as chicken feed and fish feed, over-sieving or under-sieving often occurs, resulting in uneven feed particle size and significant fluctuations in product quality. Repeated sieving is required, leading to low screening efficiency.

[0004] Airflow classification relies on high-speed airflow to separate particles. When processing large particles such as pig feed and cat feed, the high-speed airflow carries the material and continuously washes against the inner wall of the pipe, causing accelerated wear of the pipe coating and significantly shortening the equipment's lifespan. At the same time, the high-speed airflow operation consumes a lot of energy when screening large particles, increasing production costs.

[0005] In summary, existing single screening technologies in feed production cannot take into account the characteristics of different types of feed, resulting in problems such as low screening efficiency, unstable product quality, and short equipment life, and cannot meet the demands of modern feed production for high efficiency, stability, and energy saving. Utility Model Content

[0006] To address the technical problem that existing single screening technologies are unable to take into account the characteristics of different types of feed in feed production, this utility model provides a rapid grading screen for feed production.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A rapid grading screen for feed production includes a vibrating screening mechanism and a cyclone separator. The vibrating screening mechanism includes a housing and a base, which are connected by an elastic element. A vibrating motor is installed on the housing. A feed inlet is opened at the top of the housing. An upper screen and a lower screen are installed inside the housing. A first discharge port corresponding to the upper side of the upper screen and a second discharge port corresponding to the upper side of the lower screen are opened on the housing. A third discharge port is opened at the bottom of the housing. The cyclone separator includes a body and a blower. The body is located below the vibrating screening mechanism. The body includes an inlet pipe, a cyclone chamber, an outlet pipe, and a fourth discharge port. The inlet pipe is connected to one side of the top of the cyclone chamber and communicates with the blower. The top of the inlet pipe communicates with the third discharge port. The outlet pipe is installed at the top of the cyclone chamber and extends downward into the interior of the cyclone chamber. The fourth discharge port is connected to the bottom of the cyclone chamber.

[0009] The double-layer screen (upper and lower) achieves coarse, medium, and fine particle classification through vibration. Different particle sizes are discharged from the first, second, and third discharge ports. Fine particles discharged from the third discharge port are carried by airflow through the inlet pipe into a cyclone separator. Airflow generated by a blower separates the fine particles in the cyclone chamber. This separation further refines the fine particles into two different particle sizes or separates them from dust. The coarser particles are discharged through the fourth discharge port at the bottom, while the finer particles are discharged through the outlet pipe. This design compensates for the insufficient fine particle separation precision of a single vibrating screen, addresses the shortcomings of single vibrating screens such as over-screening and under-screening, and prevents coarser particles from entering the cyclone chamber, thus reducing its service life.

[0010] In this application, the vibrating screening mechanism is used to classify and process coarse particles, while the cyclone separator is used to classify and process fine particles. This takes into account the characteristics of different feeds and solves the problem that a single technology cannot adapt to multiple types of materials. The vibrating screening mechanism and the cyclone separator work together to avoid over-screening and under-screening, and to prevent large particles from wearing down the coating on the inner wall of the cyclone separator. This allows for faster and more accurate screening of materials, stable screening quality, and a long equipment life.

[0011] Furthermore, a rapid grading sieve for feed production also includes a screen cleaning mechanism comprising an airflow backflushing assembly, three pressure sensors, and a controller. The airflow backflushing assembly has two output ends, one facing the bottom of the upper screen and the other the bottom of the lower screen. The three pressure sensors are all housed within the casing and are located above the upper screen, between the upper and lower screens, and below the lower screen, respectively. The airflow backflushing assembly and the three pressure sensors are all electrically connected to the controller. The pressure sensors monitor the pressure difference between the upper and lower screens in real time. When screen blockage causes abnormal pressure differences, the controller triggers the airflow backflushing assembly to spray airflow from the bottom of the screen to clear the blockage, eliminating the need for manual shutdown for cleaning and improving production continuity and screening efficiency.

[0012] Furthermore, the airflow backflushing assembly includes an air compressor, an air tank, main air pipes, branch air pipes, pulse solenoid valves, jet pipes, and nozzles. The output end of the air compressor is connected to the input end of the air tank. There are two main air pipes, one located below the upper screen and the other below the lower screen. The output end of the air tank is connected to each of the two main air pipes. Each main air pipe is connected to several branch air pipes, each branch air pipe is connected to the input end of a pulse solenoid valve, the output end of each pulse solenoid valve is connected to the input end of a jet pipe, and the output end of each jet pipe is connected to the input end of a nozzle. The output end of each nozzle faces the upper screen. The pulse solenoid valve controls the jetting rhythm, generating a high-frequency pulsed airflow that precisely impacts the material adhering to the bottom of the screen, making it more efficient and wear-free than traditional mechanical screen cleaning. Main air pipes are located below the upper and lower screens respectively, allowing independent control of the cleaning of the two screens, avoiding mutual interference when cleaning materials of different particle sizes, and improving the targeted nature of the cleaning.

[0013] Furthermore, the main air pipe includes a primary main pipe and a secondary main pipe, which are connected by an intermediate air pipe. Both the primary and secondary main pipes are annular and coaxially arranged, with several branch air pipes connected to their inner sides. The annular main pipe ensures that the airflow is evenly distributed throughout the entire screen area, avoiding the problem of "high air pressure near the end and low air pressure far from the end" in traditional straight pipes, ensuring consistent screen cleaning effect at all locations, especially suitable for large-sized screens. The inner branch air pipes face the center of the screen, and the blowing airflow covers the entire circumference of the screen, eliminating blind spots and improving the efficiency of removing blockages.

[0014] Furthermore, multiple intermediate air pipes are provided, evenly distributed around the circumference of the primary main pipe. This even distribution of intermediate air pipes balances the air pressure between the primary and secondary main pipes, preventing eddies or pressure fluctuations in the airflow within the annular pipes, ensuring consistent blowing airflow intensity, and improving the reliability of the cleaning process.

[0015] Furthermore, the branch air pipes inside the primary main pipe are evenly distributed around the circumference of the primary main pipe, and the branch air pipes inside the secondary main pipe are evenly distributed around the circumference of the secondary main pipe. The evenly distributed branch air pipes create a ring-shaped jet array of nozzles below the screen, with each nozzle corresponding to a specific area of ​​the screen, effectively removing material from the screen holes without omission, making it particularly suitable for processing highly viscous feed.

[0016] Furthermore, a frame is connected to both the bottom of the base and the bottom of the main body, and the fan and controller are both connected to the frame.

[0017] Furthermore, a rotary motor is connected to the top of the housing, with its output shaft extending vertically into the housing. A feeding blade is connected to the bottom outer periphery of the output shaft, and there is a gap between the feeding blade and the upper surface of the upper screen. When material falls into the feed inlet, the rotating feeding blade breaks up clumps and agitates the material, promoting the sliding of particles along the surface of the upper screen. This prevents large particles from accumulating in localized areas of the screen, improves the uniformity of feeding to the upper screen, accelerates the screening speed, and reduces the probability of clogging.

[0018] Furthermore, the feed inlet is located at the top center of the housing, and four rotary motors are evenly arranged around the feed inlet. The synchronous rotation of multiple rotary motors causes the feeding blades to form a ring-shaped agitation zone around the feed inlet, ensuring that the material is evenly dispersed in all directions.

[0019] Furthermore, the elastic element is a vertically arranged spring. The spring provides elastic support, enabling the vibration generated by the vibratory motor to be efficiently transmitted to the housing and screen, while buffering the impact of vibration on the base, reducing overall equipment sway, and extending the service life of the frame and other components.

[0020] The beneficial effects of this utility model include:

[0021] 1. By using a double-layer screen to separate coarse particles through vibration and a hydrocyclone separator to process fine particles, the system can meet the classification needs of both large and fine particles, thus solving the problem of poor adaptability of a single technology.

[0022] 2. The wear of the cyclone separator pipes mainly comes from fine particles. Compared with the high wear problem of large particles in traditional airflow classification treatment, this application separates large particles in advance by vibrating screen, reducing the wear of the cyclone pipes. At the same time, the energy consumption of vibrating screen for large particles is lower than that of high-speed airflow, making it more energy-efficient overall. Attached Figure Description

[0023] To more clearly illustrate the technical solution of this utility model, the drawings used in the description 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.

[0024] Figure 1 This is a schematic diagram of the external structure of a rapid grading sieve for producing feed, which is a specific embodiment of this utility model.

[0025] Figure 2 This is a schematic diagram of the internal structure of a rapid grading screen for producing feed, which is a specific embodiment of the present invention.

[0026] Figure 3 This is a top view of the main trachea and branch trachea according to a specific embodiment of the present invention.

[0027] List of components and reference numerals:

[0028] 1. Vibrating screening mechanism; 11. Housing; 111. Feed inlet; 112. First discharge outlet; 113. Second discharge outlet; 114. Third discharge outlet; 12. Base; 13. Elastic element; 14. Vibrating motor; 15. Upper screen; 16. Lower screen; 17. Rotary motor; 18. Feeding blades;

[0029] 2. Hydrocyclone separator; 21. Body; 211. Inlet pipe; 212. Hydrocyclone chamber; 213. Outlet pipe; 214. Fourth discharge port; 22. Blower;

[0030] 3. Cleaning mechanism; 31. Air backflushing assembly; 311. Main air pipe; 3111. Primary main pipe; 3112. Secondary main pipe; 3113. Intermediate air pipe; 312. Branch air pipe; 313. Pulse solenoid valve; 314. Jet pipe; 315. Nozzle; 32. Air pressure sensor;

[0031] 4. Frame. Detailed Implementation

[0032] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] Reference Figure 1-3 This embodiment proposes a rapid grading screen for feed production, including a vibrating screening mechanism 1, a cyclone separator 2, and a screen cleaning mechanism 3.

[0034] The vibrating screening mechanism 1 includes a housing 11 and a base 12. The housing 11 and the base 12 are connected by an elastic element 13, which is a vertically arranged spring. The housing 11 is connected to a vibrating motor 14. The top of the housing 11 has a feed inlet 111. Inside the housing 11 are two layers of screens arranged vertically, namely an upper screen 15 and a lower screen 16. The surfaces of the upper screen 15 and the lower screen 16 are covered with an anti-adhesion coating, which is a Teflon coating or a nano-ceramic coating. The housing 11 has a first discharge port 112 corresponding to the upper side of the upper screen 15, a second discharge port 113 corresponding to the upper side of the lower screen 16, and a third discharge port 114 at the bottom of the housing 11. A rotary motor 17 is connected to the top of the housing 11. The output shaft of the rotary motor 17 extends vertically into the housing 11. A feeding blade 18 is connected to the bottom outer periphery of the output shaft of the rotary motor 17. There is a gap between the feeding blade 18 and the upper surface of the upper screen 15. The feed inlet 111 is opened at the top center of the housing 11. Four rotary motors 17 are provided, and the four rotary motors 17 are evenly arranged around the feed inlet 111.

[0035] The cyclone separator 2 includes a body 21 and a blower 22. The body 21 is located below the vibrating screening mechanism 1. The body 21 includes an inlet pipe 211, a cyclone chamber 212, an outlet pipe 213, and a fourth discharge port 214. One end of the inlet pipe 211 is connected to the top side of the cyclone chamber 212, and the other end is connected to the blower 22. The high-speed airflow blown out by the blower 22 enters the cyclone chamber 212 through the inlet pipe 211. The top of the inlet pipe 211 is connected to the third discharge port 114. When the high-speed airflow passes through the connection between the third discharge port 114 and the inlet pipe 211, it will carry the material discharged from the third discharge port 114 into the cyclone chamber. The connection between the third discharge port 114 and the inlet pipe 211 is inclined towards the body 21 to prevent the high-speed airflow from blowing into the third discharge port 114. The outlet pipe 213 is connected to the top of the cyclone chamber 212 and extends downward into the interior of the cyclone chamber 212. The fourth discharge port 214 is connected to the bottom of the cyclone chamber 212.

[0036] The screen cleaning mechanism 3 includes an airflow backflushing assembly 31, three air pressure sensors 32, and a controller. The airflow backflushing assembly 31 includes an air compressor, an air tank, a main air pipe 311, branch air pipes 312, a pulse solenoid valve 313, a blowpipe 314, and a nozzle 315. The output end of the air compressor is connected to the input end of the air tank. There are two main air pipes 311, located below the upper screen 15 and the lower screen 16, respectively. The output end of the air tank is connected to the two main air pipes 311. Each main air pipe 311 is connected to several branch air pipes 312. Each branch air pipe 312 is connected to the input end of a pulse solenoid valve 313. The output end of each pulse solenoid valve 313 is connected to the input end of a blowpipe 314. The output end of each blowpipe 314 is connected to the input end of a nozzle 315. The output end of each nozzle 315 faces the screen above. All three pressure sensors 32 are installed inside the housing 11. The three pressure sensors 32 are located above the upper screen 15, between the upper screen 15 and the lower screen 16, and below the lower screen 16, respectively. The air compressor, the pulse solenoid valve 313, and the three pressure sensors 32 are all electrically connected to the controller.

[0037] Furthermore, the main airway 311 includes a primary main pipe 3111 and a secondary main pipe 3112, which are connected by an intermediate airway 3113. Both the primary main pipe 3111 and the secondary main pipe 3112 are annular and coaxially arranged. Several branch airways 312 are connected to the inner sides of both the primary main pipe 3111 and the secondary main pipe 3112. Multiple intermediate airways 3113 are provided, and these multiple intermediate airways 3113 are evenly distributed around the circumference of the primary main pipe 3111. The branch airways 312 inside the primary main pipe 3111 are evenly distributed around the circumference of the primary main pipe 3111, and the branch airways 312 inside the secondary main pipe 3112 are evenly distributed around the circumference of the secondary main pipe 3112.

[0038] The bottom of the base 12 and the bottom of the body 21 are both connected to the frame 4, and the fan 22 and the controller are both connected to the frame 4.

[0039] Work process:

[0040] Feed ingredients enter through the feed inlet 111 at the center of the top of the shell 11. Four rotary motors 17 evenly arranged on the top of the shell 11 drive the feeding blades 18 at the bottom of the output shaft to rotate. The feeding blades 18 break up clumps of material and distribute them evenly to the surface of the upper screen 15, preventing large particles from accumulating in local areas of the screen and improving the uniformity of feeding.

[0041] Vibration motor 14 drives housing 11 to vibrate. Housing 11 is connected to base 12 via elastic element 13, and vibration energy is efficiently transmitted to the two screens. The upper screen 15 separates coarse particles and discharges them through the first discharge port 112; medium particles that have not passed through the screen fall into the lower screen 16. The lower screen 16 separates medium particles and discharges them through the second discharge port 113; fine particles (including dust) pass through the screen, fall into the bottom of housing 11, and are discharged through the third discharge port 114.

[0042] Fine particles discharged from the third outlet 114 at the bottom of the shell 11 enter the inlet pipe 211 of the cyclone separator 2 body 21 through an inclined pipe. The blower 22 delivers airflow into the inlet pipe 211, carrying the fine particles tangentially into the cyclone chamber 212 along one side of its top, forming a high-speed rotating airflow vortex. Under centrifugal force, coarser particles are thrown against the inner wall of the cyclone chamber 212, spiraling down along the wall and discharged through the fourth outlet 214. Finer particles (or dust) rise with the central airflow and are discharged through the outlet pipe 213 inserted into the top of the cyclone chamber 212, achieving further refinement and classification of fine particles or separation of material from dust. Because the vibrating screening mechanism 1 has already separated medium and coarse particles, the cyclone separator 2 only processes fine particles, reducing pipe wear and consuming less energy than traditional high-speed airflow classification technology.

[0043] The housing 11 contains three air pressure sensors 32, which monitor the air pressure differences above the upper screen 15, between the two screens, and below the lower screen 16. Because the high-speed airflow from the blower 22 carries the material discharged from the third outlet 114 into the cyclone chamber, there is naturally a certain air pressure difference between the upper screen 15, between the two screens, and below the lower screen 16 under the influence of air pressure. When screen blockage causes abnormal air pressure differences, the controller triggers the airflow backflushing assembly 31: the air compressor supplies air to the air tank, which then delivers the airflow to each pulse solenoid valve 313 through the annular main air pipe 311 and evenly distributed branch air pipes 312. The pulse solenoid valves 313 control the spray rhythm, spraying high-frequency pulsed airflow upwards through the spray pipes 314 and nozzles 315 to impact the material adhering to the bottom of the screen and clear the blockage. The main air pipes 311 below the upper screen 15 and the lower screen 16 are independently controlled to avoid mutual interference when cleaning materials of different particle sizes. The Teflon or nano-ceramic anti-adhesion coating on the screen surface further reduces material adhesion.

[0044] In this embodiment, the vibrating screening mechanism 1 is responsible for classifying medium and coarse particles, while the cyclone separator 2 focuses on the fine separation of fine particles. The combination of these two mechanisms covers the classification needs of various types of feed particles, solving the problem of poor adaptability of a single technology. The screen cleaning mechanism 3, through real-time monitoring by the air pressure sensor 32, pulsed airflow backflushing, and an anti-adhesion coating, achieves automatic cleaning of screen blockages, reducing downtime maintenance and improving production continuity and screening efficiency. This embodiment can reduce equipment wear and improve energy efficiency, and is suitable for the rapid and accurate classification of multi-particle-size materials in feed production.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rapid classer for producing feed, characterized in that, It includes a vibrating screening mechanism (1) and a hydrocyclone separator (2), wherein: The vibrating screening mechanism (1) includes a housing (11) and a base (12). The housing (11) and the base (12) are connected by an elastic element (13). A vibrating motor (14) is installed on the housing (11). A feed inlet (111) is opened at the top of the housing (11). An upper screen (15) and a lower screen (16) are installed inside the housing (11). A first discharge port (112) corresponding to the upper side of the upper screen (15) is opened on the housing (11). A second discharge port (113) corresponding to the upper side of the lower screen (16) is opened on the housing (11). A third discharge port (114) is opened at the bottom of the housing (11). The cyclone separator (2) includes a body (21) and a blower (22). The body (21) is located below the vibrating screening mechanism (1). The body (21) includes an inlet pipe (211), a cyclone chamber (212), an outlet pipe (213), and a fourth discharge port (214). The inlet pipe (211) is connected to the top side of the cyclone chamber (212) and is connected to the blower (22). The top of the inlet pipe (211) is connected to the third discharge port (114). The outlet pipe (213) is installed on the top of the cyclone chamber (212) and extends downward into the interior of the cyclone chamber (212). The fourth discharge port (214) is connected to the bottom of the cyclone chamber (212).

2. A rapid classer for producing feed according to claim 1, characterized in that, It also includes a screen cleaning mechanism (3), which includes an airflow backflushing assembly (31), three air pressure sensors (32) and a controller. The airflow backflushing assembly (31) includes two output ends, which face the bottom of the upper screen (15) and the lower screen (16) respectively. The three air pressure sensors (32) are all located inside the housing (11) and are located above the upper screen (15), between the upper screen (15) and the lower screen (16), and below the lower screen (16) respectively. The airflow backflushing assembly (31) and the three air pressure sensors (32) are all electrically connected to the controller.

3. A rapid classer for producing feed according to claim 2, characterized in that, The airflow backflushing assembly (31) includes an air compressor, an air tank, a main air pipe (311), branch air pipes (312), a pulse solenoid valve (313), a blowpipe (314), and a nozzle (315). The output end of the air compressor is connected to the input end of the air tank. There are two main air pipes (311), located below the upper screen (15) and the lower screen (16), respectively. The output end of the air tank is connected to the two main air pipes (311), each main air pipe (311) is connected to several branch air pipes (312), each branch air pipe (312) is connected to the input end of a pulse solenoid valve (313), the output end of each pulse solenoid valve (313) is connected to the input end of a blowpipe (314), the output end of each blowpipe (314) is connected to the input end of a nozzle (315), and the output end of each nozzle (315) faces the screen above.

4. A rapid classer for producing feed according to claim 3, characterized in that, The main trachea (311) includes a primary main trachea (3111) and a secondary main trachea (3112). The primary main trachea (3111) and the secondary main trachea (3112) are connected by an intermediate trachea (3113). The primary main trachea (3111) and the secondary main trachea (3112) are both circular and coaxial. Several branch tracheas (312) are connected to the inner side of the primary main trachea (3111) and the secondary main trachea (3112).

5. A rapid classer for producing feed according to claim 4, characterized in that, There are multiple intermediate air tubes (3113), which are evenly distributed around the circumference of the primary main tube (3111).

6. A rapid classer for producing feed according to claim 4, characterized in that, The branch trachea (312) inside the primary main trachea (3111) are evenly distributed around the circumference of the primary main trachea (3111), and the branch trachea (312) inside the secondary main trachea (3112) are evenly distributed around the circumference of the secondary main trachea (3112).

7. A rapid classer for producing feed according to claim 1, characterized in that, The bottom of the base (12) and the bottom of the body (21) are both connected to the frame (4), and the fan (22) and the controller are both connected to the frame (4).

8. A rapid grading sieve for producing feed according to claim 1, characterized in that, A rotary motor (17) is connected to the top of the housing (11). The output shaft of the rotary motor (17) extends vertically into the housing (11). A feeding blade (18) is connected to the bottom outer periphery of the output shaft of the rotary motor (17). There is a gap between the feeding blade (18) and the upper surface of the upper screen (15).

9. A rapid classer for producing feed according to claim 8, characterized in that, The feed inlet (111) is located at the top center of the housing (11), and four rotary motors (17) are provided, which are evenly arranged around the feed inlet (111).

10. A rapid classer for producing feed according to claim 1, characterized in that, The elastic element (13) is a vertically arranged spring.

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