Screening device for feed additive production

Abstract

The utility model relates to the field of screening devices, in particular to a screening device for feed additive production, and aims to solve the technical problems that a traditional screening device for feed additive production can cause screen blockage and is not convenient to clean due to high material humidity in the production process; according to the technical scheme, the screening device for feed additive production comprises a screening equipment cover body, a drying feeding mechanism, a screening mechanism, a material dispersing assembly and a supporting mechanism; the drying feeding mechanism, the screening mechanism and the material dispersing assembly are additionally arranged, the drying feeding mechanism dries internal materials, material accumulation is reduced, the material dispersing assembly scatters the materials, screen mesh blockage caused by the fact that the materials adhere together is reduced, a screen mesh in the screening mechanism is detachable, the screening mechanism is convenient to check and clean, and the screening efficiency is improved. The cleaning difficulty is reduced, and the problems that in the production process of a traditional screening device for feed additive production, due to the fact that the humidity of materials is large, a screen is blocked, and the device is not convenient to clean are solved.

Description

Technical Field

[0001] The utility model relates to the field of sieving devices, in particular to a sieving device for feed additive production. Background Art

[0002] The sieving device for feed additive production is one of the key devices in the feed production process, mainly used for grading the particle size of the formulated feed materials or additives to ensure that the products meet certain particle size distribution requirements. A reasonable particle size distribution is of great significance for improving the digestion and absorption rate of feed, promoting animal growth and reducing feed costs.

[0003] However, in the traditional sieving device for feed additive production, during the production process, when dealing with materials with high humidity or strong viscosity, the sieve mesh is prone to blockage, resulting in a decrease in sieving efficiency and an increase in material loss. The structural design of some traditional sieving devices for feed additive production is not conducive to cleaning, especially in areas that are difficult to reach inside, which increases the cleaning difficulty and time. Sometimes, when the operator loads the materials to be sieved into the traditional sieving device for feed additive production, there will be materials sticking together, reducing the work efficiency.

[0004] Therefore, aiming at the above-mentioned traditional sieving device for feed additive production, which has problems such as sieve mesh blockage due to high material humidity and the device being not conducive to cleaning during the production process, a sieving device for feed additive production can be designed. By adding a drying feeding mechanism, a sieving mechanism and a material scattering component, the materials inside are dried, reducing material accumulation, and then the materials are scattered to reduce sieve mesh blockage caused by materials sticking together. Summary of the Utility Model

[0005] In order to overcome the problems of sieve mesh blockage and the device being not conducive to cleaning due to high material humidity in the traditional sieving device for feed additive production during the production process.

[0006] The technical solution of the utility model is: a sieving device for feed additive production, including a sieving equipment housing, a drying feeding mechanism, a sieving mechanism, a material scattering component and a supporting mechanism. The drying feeding mechanism is installed on the top of the sieving equipment housing. The material scattering component is arranged inside the sieving equipment housing. The sieving mechanism is arranged below the material scattering component. The top of the supporting mechanism is arranged at the bottom of the sieving equipment housing 1.

[0007] Preferably, by adding a drying feeding mechanism, a sieving mechanism and a material scattering component, the drying feeding mechanism dries the materials inside, reducing material accumulation. The material scattering component scatters the materials, reducing sieve mesh blockage caused by materials sticking together. The sieve mesh in the sieving mechanism is detachable, making the sieving mechanism convenient for inspection and cleaning and reducing the cleaning difficulty.

[0008] Preferably, the sifting equipment housing includes a box body, a mounting groove, a pull-out discharge pipe, and a discharge chute. The mounting groove is opened on the surface of the box body. The pull-out discharge pipe is fixedly connected inside the mounting groove. The discharge chute is opened at the bottom of the front end of the discharge pipe. The pull-out discharge pipe can make the discharge position more flexible through the stretching of the operator. The mounting groove opened on the surface of the box body is stepped, which is convenient for the pull-out discharge pipe to discharge materials and will not cause the accumulation of discharged materials, improving the discharge efficiency. A vibration motor is arranged at the bottom of the box body. When the vibration motor is started, the whole equipment can be vibrated through the vibration motor connected to the box body, increasing the sifting efficiency.

[0009] Preferably, the sifting equipment housing further includes a first spring, a first connecting rod, a first movable head, an arc top, a feeding groove, and a first movable hole. The first connecting rod is fixedly installed above the box body. The first spring is sleeved outside the first connecting rod. The top end of the first connecting rod is fixedly connected to the first movable head. The arc top is arranged above the first connecting rod. The first movable hole is opened at the bottom of the edge of the arc top. The feeding groove is opened on the surface of the arc top. The first connecting rod fixedly installed above the box body and the first spring sleeved outside the first connecting rod. When the vibration motor drives the box body, the first connecting rod drives the drying feeding cylinder installed on the arc top, making the materials vibrate in the spiral disk and making the drying more convenient. The first movable hole opened at the bottom of the edge of the arc top and the first movable head fixedly connected to the top end of the first connecting rod cooperate to facilitate the installation and replacement of the arc top.

[0010] Preferably, the drying feeding mechanism includes a feeding cylinder, a spiral disk, a first roller, a connecting piece, a hot air blower, and an air supply pipe. The feeding cylinder is movably connected above the arc top. The spiral disk is arranged inside the feeding cylinder. The first roller penetrates through the center of the spiral disk. The connecting piece is fixedly connected to the top end of the first roller. The air supply hole is opened on the right side of the feeding cylinder. The air supply pipe is fixedly connected to the right side of the feeding cylinder. The hot air blower is movably connected to the top of the air supply pipe. The hot air blower conveys hot air into the feeding cylinder to dry the materials inside. The spiral disk arranged inside the feeding cylinder increases the way for the materials to enter the sieve mesh. A rotating motor is arranged inside the connecting piece. The rotating motor drives the first roller to rotate through gears, and the first roller drives the spiral disk to rotate at the same time, improving the drying rate of the materials.

[0011] Preferably, the screening mechanism includes a primary sieve tray, a secondary sieve tray, a tertiary sieve tray, a second roller, and a quaternary sieve tray. The second roller is fixedly connected to the bottom of the box body. The primary sieve tray, secondary sieve tray, tertiary sieve tray, and quaternary sieve tray are sequentially horizontally and equidistantly snap-connected inside the second roller. Ball bearings are provided at the connection between the inside of the sieve tray and the inside of the second roller and are slidably mounted on the second roller during installation. A rotating motor is provided at the bottom of the box body where the second roller is fixedly connected. A wireless remote control module is provided inside the rotating motor, and the rotating motor is wirelessly controlled through the wireless remote control module. The rotating motor drives the second roller to rotate through gears, and rotates the primary sieve tray, secondary sieve tray, tertiary sieve tray, and quaternary sieve tray movably connected to the roller, improving the screening and discharging of materials. The pore spaces inside the primary sieve tray, secondary sieve tray, tertiary sieve tray, and quaternary sieve tray become smaller and smaller, making the screening of materials more precise. There are no openings in the quaternary sieve tray, and the movably connected sieve trays can be disassembled when cleaning is required, facilitating the cleaning of the equipment.

[0012] Preferably, the bulk material component includes a brush and a third roller. The third roller is arranged in the middle inside the arc top. The bottom of the third roller is movably connected to the brush. A rotating motor is provided at the top of the third roller. A wireless remote control module is provided inside the rotating motor, and the rotating motor is wirelessly controlled through the wireless remote control module. The rotating motor drives the third roller to rotate through gears, and the third roller drives the brush to rotate. The brush is provided with bristles and striking rods. The bristles evenly bring the incoming materials to various positions of the sieve tray, improving the screening efficiency. The striking rods break up the large incoming materials, reducing the reduction in working efficiency and the blockage of the sieve mesh caused by the materials sticking together.

[0013] Preferably, the support mechanism includes a base, a gasket, a second spring, and a second connecting rod. The base is arranged below the box body. A second movable hole is opened on the surface of the base. The upper part of the second movable hole is fixedly connected to the gasket. The gasket is fixedly connected to the bottom of the second spring. A second connecting rod is arranged inside the second spring. The top end of the second connecting rod is fixedly connected to the bottom of the box. A second movable head is arranged at the bottom of the second connecting rod. The second spring increases the vibration efficiency of the box body, making the screening mechanism inside the box screen materials more fully.

[0014] The beneficial effects of the present utility model:

[0015] 1. Through the added drying feeding mechanism, screening mechanism, and bulk material component, the drying feeding mechanism dries the materials inside, reducing material accumulation. The bulk material component scatters the materials, reducing the blockage of the sieve mesh caused by the materials sticking together. The sieve mesh inside the screening mechanism is detachable, making the screening mechanism convenient for inspection and cleaning and reducing the cleaning difficulty.

[0016] 2. The first-stage sieve tray, second-stage sieve tray, third-stage sieve tray, and fourth-stage sieve tray are connected to the inside of the second roller in a step-by-step horizontal equidistant snap connection. Ball bearings are provided at the connection between the inside of the sieve tray and the inside of the second roller. During installation, they are slid onto the second roller. A rotating motor is provided at the bottom of the box body where the second roller is fixedly connected. A wireless remote control module is provided inside the rotating motor. The rotating motor is wirelessly controlled through the wireless remote control module. The rotating motor drives the second roller to rotate through gears, rotating the first-stage sieve tray, second-stage sieve tray, third-stage sieve tray, and fourth-stage sieve tray movably connected to the roller, improving the screening and discharging of materials. The pore spaces in the first-stage sieve tray, second-stage sieve tray, third-stage sieve tray, and fourth-stage sieve tray become smaller and smaller, screening the materials more finely. There are no openings in the fourth-stage sieve tray. The movably connected sieve trays can be disassembled when cleaning is required, facilitating the cleaning of the equipment.

[0017] 3. The first connecting rod fixedly installed above the box body and the first spring sleeved outside the first connecting rod enable the first connecting rod to drive the drying feed hopper installed on the arc top when the vibration motor drives the box body, vibrating the materials in the spiral disc and making drying more convenient. A first movable hole is opened at the bottom of the arc top edge, and the top end of the first connecting rod is fixedly connected to a first movable head to cooperate for convenient installation and replacement of the arc top.

[0018] 4. A rotating motor is provided at the top of the third roller. A wireless remote control module is provided inside the rotating motor. The rotating motor is wirelessly controlled through the wireless remote control module. The rotating motor drives the third roller to rotate through gears, and the third roller drives the brush to rotate. The brush is provided with bristles and striking rods. The bristles evenly bring the incoming materials to various positions of the sieve tray, improving the screening efficiency. The striking rods break up the large incoming materials, reducing the reduction in work efficiency and sieve mesh blockage caused by the materials sticking together. Description of the Drawings

[0019] Figure 1 Shown is the first three-dimensional structure schematic diagram of the sifting device used in the production of a feed additive of the present utility model;

[0020] Figure 2 Shown is the three-dimensional structure schematic diagram of the sifting equipment cover of the sifting device used in the production of a feed additive of the present utility model;

[0021] Figure 3 Shown is the three-dimensional structure schematic diagram of the drying feed mechanism of the sifting device used in the production of a feed additive of the present utility model;

[0022] Figure 4 Shown is the three-dimensional structure schematic diagram of the screening mechanism of the sifting device used in the production of a feed additive of the present utility model;

[0023] Figure 5The figure shows a three-dimensional structural schematic diagram of a bulk material component of a sieving device used in the production of a feed additive according to the present utility model;

[0024] Figure 6 The figure shows a three-dimensional structural schematic diagram of a support mechanism of a sieving device used in the production of a feed additive according to the present utility model;

[0025] Figure 7 The figure shows a structural schematic diagram of the bottom of a sieving equipment cover of a sieving device used in the production of a feed additive according to the present utility model.

[0026] Description of reference numerals: 1, sieving equipment cover; 2, drying and feeding mechanism; 3, screening mechanism; 4, bulk material component; 5, support mechanism; 101, box body; 102, installation groove; 103, pull-out discharge pipe; 104, first spring; 105, first connecting rod; 106, first movable head; 107, arc top; 108, feeding groove; 109, discharge groove; 110, first movable hole; 201, feeding cylinder; 202, spiral disk; 203, first roller; 204, connecting piece; 205, hot air blower; 206, air supply pipe; 301, first sieve plate; 302, second sieve plate; 303, third sieve plate; 304, second roller; 305, fourth sieve plate; 401, brush; 402, third roller; 501, base; 502, gasket; 503, second spring; 504, second connecting rod; 505, second movable hole; 506, second movable head. Detailed implementation manners

[0027] The present utility model will be further described below with reference to the drawings and embodiments.

[0028] Please refer to Figure 1 , Figure 2 , Figure 6 and Figure 7, the technical solution of the present utility model is: a sieving device for feed additive production, including a sieving equipment housing 1, a drying and feeding mechanism 2, a sieving mechanism 3, a material scattering assembly 4 and a supporting mechanism 5. The drying and feeding mechanism 2 is installed on the top of the sieving equipment housing 1. The material scattering assembly 4 is arranged inside the sieving equipment housing 1. The sieving mechanism 3 is arranged below the material scattering assembly 4. The top of the supporting mechanism 5 is arranged at the bottom of the sieving equipment housing 1. By adding the drying and feeding mechanism 2, the sieving mechanism 3 and the material scattering assembly 4, the drying and feeding mechanism 2 can dry the moist materials inside it through the hot air provided by the hot air blower 205, reducing material loss. The material scattering assembly 4 can scatter the incoming materials, reducing the reduction of work efficiency and the blockage of the sieve mesh caused by the materials sticking together. The sieve mesh inside the sieving mechanism 3 can be disassembled, making the sieving mechanism 3 convenient for inspection and cleaning, reducing the cleaning difficulty, increasing the sieving efficiency and sieving accuracy. The sieving equipment housing 1 includes a box body 101, an installation groove 102, a pull-out discharge pipe 103 and a discharge groove 109. The surface of the box body 101 is provided with the installation groove 102. The pull-out discharge pipe 103 is fixedly connected inside the installation groove 102. The bottom of the front end of the discharge pipe is provided with the discharge groove 109. The pull-out discharge pipe 103 can make the discharge position more flexible through the stretching of the operator. The installation groove 102 opened on the surface of the box body 101 is in a stepped shape, which is convenient for the pull-out discharge pipe 103 to discharge materials and will not cause material discharge to pile up, improving the discharge efficiency. A vibration motor is arranged at the bottom of the box body 101. When the vibration motor is started, it can vibrate the whole equipment through the vibration motor connected to the box body 101, increasing the sieving efficiency. The sieving equipment housing 1 further includes a first spring 104, a first connecting rod 105, a first movable head 106, an arc top 107, a feed groove 108 and a first movable hole 110. The first connecting rod 105 is fixedly installed above the box body 101. The first spring 104 is sleeved outside the first connecting rod 105. The top of the first connecting rod 105 is fixedly connected to the first movable head 106. The arc top 107 is arranged above the first connecting rod 105. The bottom edge of the arc top 107 is provided with the first movable hole 110. The surface of the arc top 107 is provided with the feed groove 108. The first connecting rod 105 fixedly installed above the box body 101 and the first spring 104 sleeved outside the first connecting rod 105. When the vibration motor drives the box body 101, the first connecting rod 105 drives the drying and feeding cylinder 201 installed on the arc top 107, making the materials vibrate in the spiral disk 202 and making the drying more convenient. The first movable hole 110 opened at the bottom edge of the arc top 107 and the first movable head 106 fixedly connected to the top of the first connecting rod 105 cooperate to facilitate the installation and replacement of the arc top 107. The supporting mechanism 5 includes a base 501, a gasket 502, a second spring 503 and a second connecting rod 504. The base 501 is arranged below the box body 101. The surface of the base 501 is provided with a second movable hole 505. The second movable hole 505 is fixedly connected to the gasket 502 above. The gasket 502 is fixedly connected to the bottom of the second spring 503.A second connecting rod 504 is arranged inside a second spring 503. The top end of the second connecting rod 504 is fixedly connected to the bottom of the box, and a second movable head 506 is arranged at the bottom of the second connecting rod 504. The second spring 503 increases the vibration efficiency of the box body 101, enabling the screening mechanism 3 inside the box body 101 to screen materials more fully.,

[0029] Please refer to Figure 3 、 Figure 4 and Figure 5, in this embodiment, the drying feeding mechanism 2 includes a feeding cylinder 201, a spiral disk 202, a first roller 203, a connecting piece 204, a hot air blower 205 and an air supply pipe 206. The feeding cylinder 201 is movably connected above the arc top 107. The spiral disk 202 is arranged inside the feeding cylinder 201. The first roller 203 penetrates through the center of the spiral disk 202. The connecting piece 204 is fixedly connected to the top end of the first roller 203. An air supply hole is opened on the right side of the feeding cylinder 201. The air supply pipe 206 is fixedly connected to the right side of the feeding cylinder 201. The hot air blower 205 is movably connected to the top of the air supply pipe 206. The hot air blower 205 conveys hot air into the feeding cylinder 201 to dry the materials inside. The spiral disk 202 arranged inside the feeding cylinder 201 increases the way for the materials to enter the sieve mesh. A rotating motor is arranged inside the connecting piece 204. The rotating motor drives the first roller 203 to rotate through gears. The first roller 203 drives the spiral disk 202 to rotate at the same time, improving the drying rate of the materials. The screening mechanism 3 includes a first sieve plate 301, a second sieve plate 302, a third sieve plate 303, a second roller 304 and a fourth sieve plate 305. The second roller 304 is fixedly connected to the bottom of the box body 101. The first sieve plate 301, the second sieve plate 302, the third sieve plate 303 and the fourth sieve plate 305 are horizontally and equidistantly buckled inside the second roller 304 in sequence. Ball bearings are arranged at the joints between the inside of the sieve plates and the inside of the second roller 304 and are slidably installed on the second roller 304 during installation. A rotating motor is arranged at the position where the second roller 304 is fixedly connected to the bottom of the box body 101. A wireless remote control module is arranged inside the rotating motor. The rotating motor is wirelessly controlled through the wireless remote control module. The rotating motor drives the second roller 304 to rotate through gears, rotating the first sieve plate 301, the second sieve plate 302, the third sieve plate 303 and the fourth sieve plate 305 movably connected to the roller, improving the screening and discharging of the materials. The pore spaces inside the first sieve plate 301, the second sieve plate 302, the third sieve plate 303 and the fourth sieve plate 305 become smaller and smaller, screening the materials more finely. There are no openings in the fourth sieve plate 305. The movably connected sieve plates can be disassembled when cleaning is required, facilitating the cleaning of the equipment. The material scattering component 4 includes a brush 401 and a third roller 402. The third roller 402 is arranged in the middle inside the arc top 107. The brush 401 is movably connected to the bottom of the third roller 402. A rotating motor is arranged at the top of the third roller 402. A wireless remote control module is arranged inside the rotating motor. The rotating motor is wirelessly controlled through the wireless remote control module. The rotating motor drives the third roller 402 to rotate through gears. The third roller 402 drives the brush 401 to rotate. The brush 401 is provided with bristles and striking rods. The bristles evenly bring the incoming materials to various positions of the sieve plate, improving the screening efficiency. The striking rods break the large incoming materials, reducing the reduction of work efficiency and the blockage of the sieve mesh caused by the adhesion of the materials.

[0030] When working, the operator adds the materials to be mixed into the feeding cylinder 201, starts the rotating motor in the connecting piece 204, and the rotating motor drives the first roller 203 to rotate through the gear. The first roller 203 drives the spiral disk 202, and the materials slowly enter the interior of the equipment through the spiral disk 202. At the same time, the materials in the spiral disk 202 will be affected by the hot air generated by the hot air blower 205. The hot air enters the interior of the feeding cylinder 201 through the air supply pipe 206 and the openings provided on the feeding cylinder 201. The dried materials enter the interior of the box body 101 through the feeding groove 108 provided on the surface of the arc top 107.

[0031] Then, when the materials enter the box body 101, through the rotating motor provided at the top of the third roller 402, a wireless remote control module is provided inside the rotating motor, and the rotating motor is wirelessly controlled through the wireless remote control module. The rotating motor drives the third roller 402 to rotate through the gear, and the third roller 402 drives the brush 401 to rotate. The brush 401 disperses the materials through rotation and evenly distributes the dispersed materials to various positions of the first-stage sieve plate 301.

[0032] Start the vibration motor and the rotating motor fixedly connected to the bottom of the box body 101 through the wireless remote control module. The vibration motor vibrates the entire equipment. The rotating motor drives the second roller 304 to rotate through the gear. The first-stage sieve plate 301, the second-stage sieve plate 302, the third-stage sieve plate 303, and the fourth-stage sieve plate 305 on the second roller 304 rotate. The materials after vibration screening are transported out through the discharge groove 109 at the bottom of the pull-out discharge pipe 103 installed in the installation groove 102 provided on the surface of the box body 101 due to the rotation of the sieve plate. Due to the vibration motor, the second connecting rod 504 at the bottom of the box body 101 is stuck in the second moving hole 505 through the second moving head 506. Through the gasket 502 and the spring on the base 501, the second connecting rod 504 is under the action of the second spring 503, improving the vibration of the bottom of the box. If the sieve plate needs to be cleaned, the operator rotates the sieve plate to loosen the ball bearings inside the sieve plate, and then moves the sieve plate upward to separate the sieve plate from the second roller 304.

[0033] Through the above steps, by adding the drying and feeding mechanism 2, the screening mechanism 3, and the material dispersing component 4, the drying and feeding mechanism 2 dries the materials inside, reducing the accumulation of materials. The material dispersing component 4 disperses the materials, reducing the blockage of the sieve mesh caused by the materials sticking together. The sieve mesh in the screening mechanism 3 is detachable, making the screening mechanism 3 convenient for inspection and cleaning and reducing the cleaning difficulty, solving the problems of sieve mesh blockage and inconvenient cleaning of the traditional sifting device used in the production of feed additives during the production process due to high material humidity.

[0034] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those skilled in the art.

Claims

1. A sieving device for the production of feed additives, comprising a sieving equipment housing (1); characterized in that: It also includes a drying feeding mechanism (2), a screening mechanism (3), a bulk material component (4) and a support mechanism (5). The drying feeding mechanism (2) is installed on the top of the sieving equipment housing (1). A bulk material component (4) is arranged inside the sieving equipment housing (1). The screening mechanism (3) is arranged below the bulk material component (4). The support mechanism (5) is arranged at the bottom of the sieving equipment housing (1).

2. The sieving device for producing a feed additive according to claim 1, characterized in that: The sieving equipment housing (1) includes a box body (101), an installation groove (102), a pull-out discharge pipe (103) and a discharge groove (109). An installation groove (102) is formed on the surface of the box body (101). The pull-out discharge pipe (103) is fixedly connected inside the installation groove (102). A discharge groove (109) is formed at the bottom of the front end of the pull-out discharge pipe (103).

3. The sieving device for the production of a feed additive according to claim 2, characterized in that: The sieving equipment housing (1) also includes a first spring (104), a first connecting rod (105), a first movable head (106), an arc top (107), a feeding groove (108) and a first movable hole (110). The first connecting rod (105) is fixedly installed on the upper surface of the box body (101). The first spring (104) is sleeved outside the first connecting rod (105). The top end of the first connecting rod (105) is fixedly connected to the first movable head (106). The arc top (107) is arranged above the first connecting rod (105). A first movable hole (110) is formed at the bottom of the edge of the arc top (107). A feeding groove (108) is formed on the surface of the arc top (107).

4. The sieving device for the production of a feed additive according to claim 3, characterized in that: The drying feeding mechanism (2) includes a feeding cylinder (201), a spiral disc (202), a first roller (203), a connecting piece (204), a hot air blower (205) and an air supply pipe (206). The feeding cylinder (201) is movably connected above the arc top (107). The spiral disc (202) is arranged inside the feeding cylinder (201). The first roller (203) penetrates through the center of the spiral disc (202). The connecting piece (204) is fixedly connected to the top end of the first roller (203). An air supply hole is formed on the right side of the feeding cylinder (201). The air supply pipe (206) is fixedly connected to the right side of the feeding cylinder (201). The top of the air supply pipe (206) is movably connected to the hot air blower (205).

5. The sieving device for the production of a feed additive according to claim 4, characterized in that: The screening mechanism (3) includes a primary sieve plate (301), a secondary sieve plate (302), a tertiary sieve plate (303), a second roller (304) and a quaternary sieve plate (305). The second roller (304) is installed at the bottom of the box body (101). The primary sieve plate (301), the secondary sieve plate (302), the tertiary sieve plate (303) and the quaternary sieve plate (305) are horizontally and equidistantly buckled and connected inside the second roller (304) in sequence.

6. The sieving device used in the production of a feed additive according to claim 5, characterized in that: The bulk material component (4) includes a brush (401) and a third roller (402). The third roller (402) is arranged in the middle inside the arc top (107). The bottom of the third roller (402) is movably connected to the brush (401).

7. The sieving device for producing a feed additive according to claim 6, characterized in that: The support mechanism (5) includes a base (501), a gasket (502), a second spring (503), a second connecting rod (504), a second moving hole (505), and a second moving head (506). The base (501) is arranged below the box body (101). A second moving hole (505) is formed on the surface of the base (501). The second moving hole (505) is fixedly connected to the gasket (502) above. The gasket (502) is fixedly connected to the bottom of the second spring (503). The second connecting rod (504) is arranged inside the second spring (503). The top end of the second connecting rod (504) is fixedly connected to the bottom of the box. The bottom of the second connecting rod (504) is provided with the second moving head (506).

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