Quantitative discharging rice multi-stage screening device and screening method thereof

By designing a rice multi-stage screening device including a base, screening box, cycle assembly, mounting frame, cam, feeding assembly and swing assembly, the problem that quantitative feeding and multi-stage grading screening in the prior art cannot be achieved simultaneously in the prior art. , realize quantitative investment and grading screening of rice, improve screening efficiency and economical use of equipment.

CN119406737AInactive Publication Date: 2025-02-11SUIZHOU DAZIRAN RICE IND CO LTD
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Patent Information

Application Number
CN202411579699.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-06
Publication Date
2025-02-11
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

In the existing rice screening technology, quantitative feeding and multi-level grading screening cannot be achieved simultaneously, resulting in the need of manual operation and increased labor intensity.

Method used

A multi-stage screening device for quantitative feeding is designed, including a base, screening box, cycle assembly, mounting frame, cam, cutting assembly and swing assembly. Through the coordination of cam and swing assembly, the quantitative input of rice is achieved and Grading filtering.

Benefits of technology

Quantitative investment and multi-level hierarchical screening of rice are realized, manual operation is reduced, screening efficiency and equipment use economy are improved, and noise is reduced.

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Abstract

The invention discloses a rice multi-stage screening device with a quantitative discharging function, and relates to the technical field of rice screening, and a screening box is movably connected with a base. Due to the fact that the screening box is movably connected with the base, the periodic assembly, the mounting frame and the cam are matched with the discharging assembly so that rice can be quantitatively put into the screening box, and the cam and the swing assembly are matched so that rice in the screening box can be classified and screened; one end of the telescopic shaft and one end of the telescopic shaft spring are both fixedly connected with the jarring plate, the other end of the telescopic shaft penetrates through the mounting sub-frame to be fixedly connected with the periodic plate, the other end of the telescopic shaft spring is fixedly connected with the mounting sub-frame, the cam is movably connected with the jarring plate, a discharging port is formed in one side of the base, and the discharging assembly communicates with the screening box through the discharging port. Therefore, the jolting plate is hit through rotation of the cam, then power is transmitted to the periodic plate through the telescopic shaft, and quantitative and quantity-controlled discharging can be achieved through periodic shielding and opening of the discharging port in the process.
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Description

Technical Field

[0001] The invention relates to the technical field of rice screening, in particular to a multi-stage screening device for quantitatively feeding rice and a screening method thereof. Background Art

[0002] Rice screening mainly uses a sieve or vibrating screen to separate impurities in rice (such as stones, rice husks, millet, etc.) from normal rice. During the process, the aperture and vibration frequency of the sieve will be adjusted as needed to ensure the screening effect.

[0003] Rice screening machines are used to clean and screen rice to ensure its quality and consistency. Common types of screening machines include:

[0004] Vibrating screen: Separates rice and impurities through a vibrating screen. Suitable for removing impurities such as rice husks, stones, etc. from rice.

[0005] Photoelectric Rice Sorter: Uses optical technology to detect and separate colored or irregularly shaped rice grains to ensure the consistency and appearance quality of rice.

[0006] Airflow Screening Machine: Uses air flow to remove light impurities such as rice husk fragments. This method is particularly effective for small and light foreign matter.

[0007] Gravity sorting machine: Separates rice by gravity, selects different rice grains according to density, and removes empty grains and other unqualified rice grains.

[0008] Each screening machine has its own specific application scenario and they are usually used in combination to achieve the best effect.

[0009] In the process of using the rice screening in the prior art, there is a situation that quantitative feeding and graded screening cannot be used in combination, so that feeding needs to be done manually, which increases the labor intensity. Summary of the invention

[0010] The object of the present invention is to provide a multi-stage rice screening device and a screening method for quantitative feeding, so as to solve the problems raised in the above-mentioned background technology.

[0011] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a multi-stage screening device for quantitatively feeding rice, comprising a base, a screening box, a periodic component, a mounting frame, a cam, a feeding component and a swinging component, wherein the screening box is movably connected to the base, the periodic component, the mounting frame and the cam cooperate with the feeding component to allow the quantitative feeding of rice into the screening box, and the cam cooperates with the swinging component to provide graded screening of the rice in the screening box.

[0012] As a further solution of the present invention: a multi-stage screening device for quantitative rice feeding, the mounting frame comprises a mounting main frame and a mounting sub-frame, the mounting sub-frame is fixedly connected to the mounting main frame, the periodic component comprises a shock plate, a telescopic shaft, a periodic plate, a telescopic shaft spring and a spring telescopic rod, the outer side of the telescopic shaft is sleeved with a telescopic shaft spring, one end of the telescopic shaft and the telescopic shaft spring are both fixedly connected to the shock plate, the other end of the telescopic shaft passes through the mounting sub-frame and is fixedly connected to the periodic plate, the other end of the telescopic shaft is fixedly connected to the mounting sub-frame, the cam is movably connected to the shock plate, a feeding port is provided on one side of the base, and the feeding component is connected to the screening box through the feeding port.

[0013] As a further solution of the present invention: a multi-stage rice screening device for quantitative feeding, the swing assembly includes a swing plate, a driving wheel, a driven wheel and a conveyor belt, several groups of the swing plates are accommodated inside the screening box, one end of the swing plate is fixedly connected to the driven wheel after passing through the screening box, several groups of the driving wheels are coaxially arranged with the cam, and the driving wheel is connected to the driven wheel through a conveyor belt.

[0014] As a further solution of the present invention: a multi-stage screening device for quantitative rice feeding, wherein a cover plate is movably connected to one side of the feeding component, a feeding channel is fixedly connected to the other side of the feeding component, the feeding channel is fixedly connected to the feeding port, and the feeding component is connected to the feeding port through the feeding channel.

[0015] As a further solution of the present invention: a multi-stage screening device for quantitative rice feeding, the driving mechanism includes a mounting plate, a roller frame, a friction roller and a servo motor, the mounting plate is fixedly connected to the base, the mounting main frame is embedded in the mounting plate, the roller frame is fixedly connected to the mounting plate, and the friction roller passes through the mounting plate and is movably connected to the mounting main frame.

[0016] As a further solution of the present invention: a multi-stage rice screening device for quantitative feeding also includes spring telescopic rods, two groups of the spring telescopic rods are respectively arranged on one side of the telescopic shaft spring and are used to share the pressure when the telescopic shaft spring moves.

[0017] As a further solution of the present invention: a multi-stage screening device for quantitatively feeding rice, the servo motor 2 is fixedly installed on one side of the main mounting frame, the interior of the cam is fixedly connected to a camshaft, the output end of the servo motor 2 is fixedly connected to the camshaft, and the driving wheel is coaxial with the camshaft.

[0018] As a further solution of the present invention: a multi-stage screening device for quantitatively feeding rice, further comprising a noise reduction component, wherein the noise reduction component comprises a noise absorbing unit, a mechanical wave decoding unit, an inverse replication unit and an elimination unit, wherein the noise reduction component absorbs noise through the noise absorbing unit, analyzes the noise wave through the mechanical wave decoding unit, replicates the noise wave through the inverse replication unit and generates an inverse mechanical wave, and the elimination unit performs noise elimination by fusing the inverse mechanical wave with the noise.

[0019] As a further solution of the present invention: a multi-stage screening device for quantitatively discharging rice, the cover plate is a slope structure for facilitating the output of rice.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Since the screening box is movably connected to the base, the periodic component, the mounting frame and the cam cooperate with the unloading component to allow the rice to be quantitatively put into the screening box, and the cam cooperates with the swinging component to provide graded screening of the rice in the screening box. Specifically, a telescopic shaft spring is sleeved on the outer side of the telescopic shaft, one end of the telescopic shaft and the telescopic shaft spring are both fixedly connected to the shock plate, the other end of the telescopic shaft passes through the mounting sub-frame and is fixedly connected to the periodic plate, the other end of the telescopic shaft spring is fixedly connected to the mounting sub-frame, the cam is movably connected to the shock plate, a unloading port is provided on one side of the base, and the unloading component is connected to the screening box through the unloading port. Therefore, the cam rotates to strike the shock plate, and then the power is transmitted to the periodic plate through the telescopic shaft. During the process, quantitative controlled unloading can be achieved by periodically covering and opening the unloading port.

[0022] 2. The rotation of the cam and servo motor 2 drives the driving wheel to rotate, and the driving wheel drives the conveyor belt to rotate the driven wheel. Therefore, the swing plate can swing with the forward and reverse rotation of the cam and servo motor 2, thereby avoiding the problem of low screening efficiency during static screening.

[0023] 3. Since the mounting plate is fixedly connected to the base, the main mounting frame is embedded in the mounting plate, the roller frame is fixedly connected to the mounting plate, and the friction roller passes through the mounting plate and is movably connected to the main mounting frame, the height of the mounting frame can be adjusted through the driving mechanism, thereby adjusting the frequency of the cam and the shock plate hitting and adjusting the tension of the conveyor belt, thereby extending the service life of the equipment after the conveyor belt is aged and improving the economic benefits of use.

[0024] 4. Since the noise reduction component includes a noise absorbing unit, a mechanical wave decoding unit, an inverse replication unit and an elimination unit, the noise reduction component absorbs noise through the noise absorbing unit, analyzes the noise wave through the mechanical wave decoding unit, replicates the noise wave through the inverse replication unit and generates an inverse mechanical wave, and the elimination unit performs noise elimination by fusing the reverse mechanical wave with the noise, thereby not generating too much noise during the rice screening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the overall structure of a multi-stage screening device for quantitatively feeding rice and a screening method thereof according to the present invention;

[0026] Figure 2 It is a schematic structural diagram of a cam in a multi-stage rice screening device for quantitative feeding and a screening method thereof according to the present invention;

[0027] Figure 3 It is a schematic structural diagram of a periodic component and a feeding component in a multi-stage screening device for quantitatively feeding rice and a screening method thereof according to the present invention;

[0028] Figure 4 It is a schematic structural diagram of a swinging assembly in a multi-stage rice screening device for quantitative feeding and a screening method thereof according to the present invention;

[0029] Figure 5 It is a schematic structural diagram of a driving mechanism in a multi-stage screening device for quantitatively feeding rice and a screening method thereof according to the present invention;

[0030] Figure 6 It is a schematic structural diagram of periodic components in a multi-stage screening device for quantitatively feeding rice and a screening method thereof according to the present invention;

[0031] Figure 7 The invention discloses a multi-stage screening device for quantitatively feeding rice and a screening method thereof Figure 3 The enlarged view of point A in the middle;

[0032] In the figure: 1. base; 11. discharge port; 2. screening box; 3. driving mechanism; 31. mounting plate; 32. roller frame; 33. friction roller; 34. servo motor one; 4. periodic component; 41. shock plate; 42. telescopic shaft; 43. periodic plate; 44. telescopic shaft spring; 45. spring telescopic rod; 5. mounting frame; 51. main mounting frame; 52. auxiliary mounting frame; 6. cam; 61. servo motor two; 62. camshaft; 7. discharge component; 71. cover plate; 72. discharge channel; 8. noise reduction component; 9. swing component; 91. swing plate; 92. driving wheel; 93. driven wheel; 94. conveyor belt. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0035] Please refer to the accompanying drawings. In an embodiment of the present invention, a multi-stage screening device for quantitatively feeding rice includes a base 1, a screening box 2, a periodic component 4, a mounting frame 5, a cam 6, a feeding component 7 and a swinging component 9. The screening box 2 is movably connected to the base 1. The periodic component 4, the mounting frame 5 and the cam 6 cooperate with the feeding component 7 to allow the quantitative feeding of rice into the screening box 2. The cam 6 cooperates with the swinging component 9 to provide graded screening of rice in the screening box 2.

[0036] Other embodiments of the present invention: Since the screening box 2 is movably connected to the base 1, the periodic component 4, the mounting frame 5 and the cam 6 cooperate with the unloading component 7 to allow the rice to be quantitatively put into the screening box 2, and the cam 6 cooperates with the swing component 9 to provide graded screening of the rice in the screening box 2. Specifically, a telescopic shaft spring 44 is sleeved on the outer side of the telescopic shaft 42, one end of the telescopic shaft 42 and the telescopic shaft spring 44 are both fixedly connected to the shock plate 41, the other end of the telescopic shaft 42 passes through the mounting sub-frame 52 and is fixedly connected to the periodic plate 43, the other end of the telescopic shaft spring 44 is fixedly connected to the mounting sub-frame 52, the cam 6 is movably connected to the shock plate 41, a unloading port 11 is provided on one side of the base 1, and the unloading component 7 is connected to the screening box 2 through the unloading port 11, so that the cam 6 rotates to strike the shock plate 41, and then the power is transmitted to the periodic plate 43 through the telescopic shaft 42, and quantitative controlled unloading can be achieved by periodically covering and opening the unloading port 11 during the process.

[0037] As a further solution of the present invention: a multi-stage screening device for quantitative rice feeding, the mounting frame 5 includes a mounting main frame 51 and a mounting sub-frame 52, the mounting sub-frame 52 is fixedly connected to the mounting main frame 51, the periodic component 4 includes a shock plate 41, a telescopic shaft 42, a periodic plate 43, a telescopic shaft spring 44 and a spring telescopic rod 45, the outer side of the telescopic shaft 42 is sleeved with a telescopic shaft spring 44, one end of the telescopic shaft 42 and the telescopic shaft spring 44 are both fixedly connected to the shock plate 41, the other end of the telescopic shaft 42 passes through the mounting sub-frame 52 and is fixedly connected to the periodic plate 43, the other end of the telescopic shaft spring 44 is fixedly connected to the mounting sub-frame 52, the cam 6 is movably connected to the shock plate 41, a feeding port 11 is opened on one side of the base 1, and the feeding component 7 is connected to the screening box 2 through the feeding port 11.

[0038] Other embodiments of the present invention: the driving wheel 92 is driven to rotate by the rotation of the cam 6 and the servo motor 2 61, and the driving wheel 92 drives the conveyor belt 94 to rotate the driven wheel 93, so that the swing plate 91 can achieve a swinging effect with the forward and reverse rotation of the cam 6 and the servo motor 2 61, thereby avoiding the problem of low screening efficiency during static screening.

[0039] Other embodiments of the present invention: Since the mounting plate 31 is fixedly connected to the base 1, the mounting main frame 51 is embedded in the mounting plate 31, the roller frame 32 is fixedly connected to the mounting plate 31, and the friction roller 33 passes through the mounting plate 31 and is movably connected to the mounting main frame 51, the height of the mounting frame 5 can be adjusted by the driving mechanism 3, thereby adjusting the frequency of the cam 6 and the shock plate 41 and adjusting the tension of the conveyor belt 94, thereby extending the service life of the equipment after the conveyor belt 94 is aged and improving the economic benefits of use.

[0040] As a further solution of the present invention: a multi-stage rice screening device for quantitative feeding, the swing assembly 9 includes a swing plate 91, a driving wheel 92, a driven wheel 93 and a conveyor belt 94, several groups of the swing plates 91 are accommodated in the screening box 2, one end of the swing plate 91 passes through the screening box 2 and is fixedly connected to the driven wheel 93, several groups of the driving wheels 92 are coaxially arranged with the cam 6, and the driving wheel 92 is transmission-connected to the driven wheel 93 through the conveyor belt 94.

[0041] As a further solution of the present invention: a multi-stage screening device for quantitative rice feeding, wherein a cover plate 71 is movably connected to one side of the feeding component 7, and a feeding channel 72 is fixedly connected to the other side of the feeding component 7, and the feeding channel 72 is fixedly connected to the feeding port 11, and the feeding component 7 is connected to the feeding port 11 through the feeding channel 72.

[0042] As a further solution of the present invention: a multi-stage screening device for quantitative feeding of rice, the driving mechanism 3 includes a mounting plate 31, a roller frame 32, a friction roller 33 and a servo motor 34, the mounting plate 31 is fixedly connected to the base 1, the mounting main frame 51 is embedded in the mounting plate 31, the roller frame 32 is fixedly connected to the mounting plate 31, and the friction roller 33 passes through the mounting plate 31 and is movably connected to the mounting main frame 51.

[0043] As a further solution of the present invention: a multi-stage rice screening device for quantitative feeding also includes spring telescopic rods 45, two groups of spring telescopic rods 45 are respectively arranged on one side of the telescopic shaft spring 44 and are used to share the pressure when the telescopic shaft spring 44 moves.

[0044] As a further solution of the present invention: a multi-stage screening device for quantitative feeding of rice, the servo motor 61 is fixedly installed on one side of the main frame 51, the cam 6 is fixedly connected to the inside of the cam 6 with a camshaft 62, the output end of the servo motor 61 is fixedly connected to the camshaft 62, and the driving wheel 92 is coaxial with the camshaft 62.

[0045] As a further solution of the present invention: a multi-stage screening device for quantitatively feeding rice, further comprising a noise reduction component 8, wherein the noise reduction component 8 comprises a noise absorption unit, a mechanical wave decoding unit, an inverse replication unit and an elimination unit, wherein the noise reduction component 8 absorbs noise through the noise absorption unit, the noise reduction component 8 analyzes the noise wave through the mechanical wave decoding unit, the noise reduction component 8 replicates the noise wave through the inverse replication unit and generates an inverse mechanical wave, and the elimination unit performs noise elimination by fusing the inverse mechanical wave with the noise.

[0046] Other embodiments of the present invention: Since the noise reduction component 8 includes a noise absorbing unit, a mechanical wave decoding unit, an inverse copying unit and an elimination unit, the noise reduction component 8 absorbs noise through the noise absorbing unit, the noise reduction component 8 analyzes the noise wave through the mechanical wave decoding unit, the noise reduction component 8 copies the noise wave through the inverse copying unit and generates an inverse mechanical wave, and the elimination unit performs noise elimination by fusing the reverse mechanical wave with the noise, thereby not generating too much noise during the rice screening process.

[0047] As a further solution of the present invention: a multi-stage screening device for quantitatively discharging rice, the cover plate 71 is a slope structure for facilitating the output of rice.

[0048] The working principle of the present invention is: since the screening box 2 is movably connected with the base 1, the periodic component 4, the mounting frame 5 and the cam 6 cooperate with the unloading component 7 to allow the rice to be quantitatively put into the screening box 2, and the cam 6 cooperates with the swing component 9 to provide graded screening of the rice in the screening box 2. Specifically, a telescopic shaft spring 44 is sleeved on the outer side of the telescopic shaft 42, and one end of the telescopic shaft 42 and the telescopic shaft spring 44 are both fixedly connected to the shock plate 41, and the other end of the telescopic shaft 42 passes through the mounting sub-frame 52 and is fixedly connected to the periodic plate 43, and the other end of the telescopic shaft spring 44 is fixedly connected to the mounting sub-frame 52. The cam 6 is movably connected to the shock plate 41, and a unloading port 11 is provided on one side of the base 1. The unloading component 7 is connected to the screening box 2 through the unloading port 11. Therefore, the cam 6 rotates to strike the shock plate 41, and then the power is transmitted to the periodic plate 43 through the telescopic shaft 42. During the process, quantitative controlled unloading can be achieved by periodically covering and opening the unloading port 11.

[0049] The rotation of the cam 6 and the servo motor 2 61 drives the driving wheel 92 to rotate, and the driving wheel 92 drives the conveyor belt 94 to rotate the driven wheel 93. Therefore, the swing plate 91 can achieve a swinging effect with the forward and reverse rotation of the cam 6 and the servo motor 2 61, thereby avoiding the problem of low screening efficiency during static screening.

[0050] Since the mounting plate 31 is fixedly connected to the base 1, the mounting main frame 51 is embedded in the mounting plate 31, the roller frame 32 is fixedly connected to the mounting plate 31, and the friction roller 33 passes through the mounting plate 31 and is movably connected to the mounting main frame 51, the height of the mounting frame 5 can be adjusted by the driving mechanism 3, thereby adjusting the frequency of the cam 6 and the shock plate 41 and adjusting the tension of the conveyor belt 94, thereby extending the service life of the equipment after the conveyor belt 94 is aged and improving the economic benefits of use.

[0051] Since the noise reduction component 8 includes a noise absorbing unit, a mechanical wave decoding unit, an inverse copying unit and an elimination unit, the noise reduction component 8 absorbs noise through the noise absorbing unit, the noise reduction component 8 analyzes the noise wave through the mechanical wave decoding unit, the noise reduction component 8 copies the noise wave through the inverse copying unit and generates an inverse mechanical wave, and the elimination unit performs noise elimination by fusing the reverse mechanical wave with the noise, thereby not generating too much noise during the rice screening process.

[0052] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-stage screening device for quantitatively feeding rice, characterized in that: The invention comprises a base (1), a screening box (2), a periodic component (4), a mounting frame (5), a cam (6), a material discharge component (7) and a swinging component (9); the screening box (2) is movably connected to the base (1); the periodic component (4), the mounting frame (5) and the cam (6) cooperate with the material discharge component (7) to allow rice to be quantitatively fed into the screening box (2); and the cam (6) cooperates with the swinging component (9) to perform graded screening of the rice in the screening box (2).

2. A multi-stage screening device for quantitatively feeding rice according to claim 1, characterized in that: The mounting frame (5) comprises a mounting main frame (51) and a mounting sub-frame (52), wherein the mounting sub-frame (52) is fixedly connected to the mounting main frame (51), and the periodic component (4) comprises a shock plate (41), a telescopic shaft (42), a periodic plate (43), a telescopic shaft spring (44) and a spring telescopic rod (45). The outer side of the telescopic shaft (42) is sleeved with a telescopic shaft spring (44), one end of the telescopic shaft (42) and the telescopic shaft spring (44) are both fixedly connected to the shock plate (41), the other end of the telescopic shaft (42) passes through the mounting sub-frame (52) and is fixedly connected to the periodic plate (43), the other end of the telescopic shaft spring (44) is fixedly connected to the mounting sub-frame (52), the cam (6) is movably connected to the shock plate (41), a discharge port (11) is provided on one side of the base (1), and the discharge component (7) is connected to the screening box (2) through the discharge port (11).

3. A multi-stage screening device for quantitatively feeding rice according to claim 2, characterized in that: The swing assembly (9) comprises a swing plate (91), a driving wheel (92), a driven wheel (93) and a conveyor belt (94); a plurality of sets of the swing plates (91) are accommodated in the screening box (2); one end of the swing plate (91) passes through the screening box (2) and is fixedly connected to the driven wheel (93); a plurality of sets of the driving wheels (92) are coaxially arranged with the cam (6); and the driving wheel (92) is transmission-connected to the driven wheel (93) via the conveyor belt (94).

4. A multi-stage screening device for quantitatively feeding rice according to claim 3, characterized in that: A cover plate (71) is movably connected to one side of the blanking assembly (7), and a blanking channel (72) is fixedly connected to the other side of the blanking assembly (7); the blanking channel (72) is fixedly connected to the blanking port (11); and the blanking assembly (7) is connected to the blanking port (11) via the blanking channel (72).

5. A multi-stage screening device for quantitatively feeding rice according to claim 4, characterized in that: The driving mechanism (3) comprises a mounting plate (31), a roller frame (32), a friction roller (33) and a servo motor (34); the mounting plate (31) is fixedly connected to the base (1); the mounting main frame (51) is embedded in the mounting plate (31); the roller frame (32) is fixedly connected to the mounting plate (31); and the friction roller (33) passes through the mounting plate (31) and is movably connected to the mounting main frame (51).

6. A multi-stage screening device for quantitatively feeding rice according to claim 5, characterized in that: It also includes spring telescopic rods (45). Two groups of the spring telescopic rods (45) are arranged on one side of the telescopic shaft spring (44) and are used to share the pressure when the telescopic shaft spring (44) moves.

7. A multi-stage screening device for quantitatively feeding rice according to claim 6, characterized in that: The second servo motor (61) is fixedly mounted on one side of the mounting main frame (51); a camshaft (62) is fixedly connected to the interior of the cam (6); an output end of the second servo motor (61) is fixedly connected to the camshaft (62); and the driving wheel (92) is coaxial with the camshaft (62).

8. The multi-stage screening device for quantitatively feeding rice according to claim 7, characterized in that: It also includes a noise reduction component (8), which includes a noise absorption unit, a mechanical wave decoding unit, an inverse replication unit and an elimination unit. The noise reduction component (8) absorbs noise through the noise absorption unit, analyzes the noise wave through the mechanical wave decoding unit, replicates the noise wave through the inverse replication unit and generates an inverse mechanical wave, and the elimination unit performs noise elimination by fusing the inverse mechanical wave with the noise.

9. A multi-stage screening device for quantitatively feeding rice according to claim 8, characterized in that: The cover plate (71) is a slope structure that facilitates the output of rice.