Feed coarse screening and separating device and method

Abstract

The invention discloses a feed coarse screening and separating device and method, and belongs to the technical field of feed processing equipment. A feed coarse screening separation device comprises a frame main body and a screen arranged in the frame main body, and further comprises a material guide plate arranged at the bottom of the frame main body, located under the screen and used for receiving feed screened from the screen; a concentrated feed outlet and a coarse feed outlet are formed in the frame body, the concentrated feed outlet is opposite to the feed guide plate and used for receiving feed on the feed guide plate, and the coarse feed outlet is opposite to the screen and used for receiving feed which is not screened by the screen; feed can be repeatedly screened, mutual interference and entrainment among feed particles with different particle sizes are avoided, meanwhile, the monitoring equipment is arranged to detect the discharging speed on the discharging plate to feed back and adjust screening parameters, and therefore efficient screening is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of feed processing equipment, and in particular to a feed coarse screening and separation device. Background Art

[0002] In the herbivorous animal feed processing industry, coarse screening separation is an indispensable key link in the production process. Its purpose is to preliminarily remove impurities and particles that do not meet the particle size requirements in the raw materials, laying the foundation for subsequent fine processing. General impurities include incompletely crushed straw, corn cobs, and grass. However, traditional feed coarse screening separation devices often have some problems during the screening process, especially when processing feed raw materials with larger mixed particle sizes, it is easy to have too many small particles of feed mixed in larger particles of feed. This phenomenon not only affects the uniformity and quality of the feed, but may also cause blockage and wear of subsequent processing equipment, reducing overall production efficiency and product quality.

[0003] Specifically, the design of traditional coarse screening separation devices often focuses on screening within a single particle size range, ignoring the mutual interference and entrainment between particles of different sizes. At the same time, factors such as the selection of the mesh aperture, the screening method, and the vibration parameters during the screening process may also affect the screening effect. When the mesh aperture is too large, small particles of feed can easily pass through the mesh together with large particles of feed, resulting in incomplete screening.

[0004] In addition, traditional coarse screening separation devices lack effective feedback and adjustment mechanisms during the screening process and are unable to adjust screening parameters in real time according to actual screening results, thus limiting further improvements in screening efficiency and accuracy. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to propose a feed coarse screening and separation device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The invention comprises a frame body and a screen mesh arranged in the frame body, and further comprises: a guide plate arranged at the bottom of the frame body, the guide plate being located directly below the screen mesh and being used for receiving feed screened from the screen mesh; a fine feed outlet and a coarse feed outlet are respectively arranged on the frame body, the fine feed outlet is opposite to the guide plate and being used for receiving feed on the guide plate, and the coarse feed outlet is opposite to the screen mesh and being used for receiving feed not screened by the screen mesh; a re-screening assembly is arranged in the coarse feed outlet, the re-screening assembly comprises an outer screening assembly and an inner screening assembly, the inner screening assembly consists of a fine screen assembly one and a fine screen assembly two; a feeding pipe is arranged in the inner screening assembly, the feeding pipe is fixedly connected to the inner wall of the coarse feed outlet, a feeding assembly is arranged on the feeding pipe, the feeding assembly and the outer screening assembly are fixed on the same component, and the feeding pipe is used for conveying the feed screened by the inner screening assembly into the fine feed outlet.

[0007] Preferably, an upper cover is provided on the frame body, a feeding port is provided on the upper cover, the feeding port is arranged at one end of the upper cover away from the fine material outlet and the coarse material outlet, and the upper cover is fixed to the frame body by a locking assembly.

[0008] Preferably, the frame body is supported by legs, the bottoms of the four ends of the frame body are respectively fixedly connected to limit rods, the limit rods are inserted into the legs, a buffer spring is provided between the frame body and the legs, and the buffer spring is sleeved on the limit rods.

[0009] Preferably, a mounting frame is provided in the frame body, the screen is installed on the mounting frame, the material guide plate is inclined toward the fine material outlet and the coarse material outlet, and a vibration motor is provided at the bottom of the frame body.

[0010] Preferably, both ends of the outer screening assembly are provided with an end plate one, a rotating rod is fixedly connected to the end plate one, and the feeding assembly is fixedly connected to the end plate one.

[0011] Furthermore, end plates 2 are provided at both ends of the inner screening assembly, a rotating ring is fixedly connected to one end plate 2 away from the rotating rod, a driven gear is provided on the rotating ring, and a driving gear meshing with the driven gear is provided on the inner wall of the coarse material outlet.

[0012] Furthermore, a discharge port is provided at the portion of the feed pipe located outside the inner screening assembly, a discharge plate for receiving feed dropped from the discharge port is fixedly connected to the inner wall of the coarse material outlet, the discharge plate is communicated with the fine material outlet, a lever is provided on the end plate, and the lever is located between the outer screening assembly and the inner screening assembly.

[0013] Preferably, the fine screen assembly 1 and the fine screen assembly 2 are both arranged on the end plate 2 in a circumferentially distributed arrangement, wherein the fine screen assembly 1 is arranged around the outer circle of the fine screen assembly 2, and a fine screen assembly 2 is provided between every two fine screen assemblies 1, and a material conveying channel 1 is formed between each adjacent fine screen assembly 1 and fine screen assembly 2.

[0014] Furthermore, the fine screen assembly 1 and the fine screen assembly 2 are both arranged in a circular distribution on the end plate 2, wherein the fine screen assembly 1 and the fine screen assembly 2 are crescent-shaped curved plates symmetrically arranged with each other, and the two symmetrically arranged fine screen assemblies 1 and 2 form a group of screen elements, and the screen elements are provided with multiple groups, and the symmetrically arranged fine screen assembly 1 and the fine screen assembly 2 form an open space with an accommodating cavity inside and opening 1 and opening 2 at both ends respectively, and the multiple groups of screen elements are also arranged in a circular distribution on the end plate 2, and the adjacent fine screen assembly 1 and fine screen assembly 2 between every two groups of the screen elements form a channel with a feed channel 2 in the middle and openings 3 and 4 at both ends.

[0015] A method for using a feed coarse screening and separation device mainly comprises the following steps: S1. Pour the feed to be screened onto the screen and screen the feed through the screen; S2. The feed that meets the requirements falls onto the guide plate through the mesh of the screen, and is transported to the concentrate outlet through the guide plate; S3. Feed that does not meet the requirements falls into the coarse material outlet through the screen; S4, the outer screening component and the inner screening component re-screen the feed entering the coarse material outlet, and the feed that does not meet the requirements flows out through the outer screening component; S5. The feed that meets the requirements is retained by the inner screening component and is transported to the concentrate outlet through the feeding pipe.

[0016] Compared with the prior art, the present invention provides a feed coarse screening and separation device, which has the following beneficial effects: 1. The feed coarse screening and separation device can separate and screen feeds of different particle sizes that interfere with each other or are entrained by multiple screenings through the screen and the re-screening component, and redistribute and disrupt the feed through the fine screen component 1 and the fine screen component 2, so as to avoid incomplete screening.

[0017] 2. The feed coarse screening and separation device adjusts the screening parameters by setting up monitoring equipment to detect the material falling rate on the material discharge plate, thereby improving the screening efficiency and accuracy.

[0018] The parts not involved in the feed coarse screening and separation device are the same as the existing technology or can be implemented by using the existing technology. The present invention can repeatedly screen the feed to avoid mutual interference and entrainment between feed particles of different particle sizes. At the same time, by setting a monitoring device to detect the material drop rate on the discharge plate, the screening parameters are feedback-adjusted, thereby achieving high-efficiency screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a feed coarse screening and separation device proposed by the present invention; Figure 2 This is a schematic diagram of the structure inside the frame body of a feed coarse screening and separation device proposed by the present invention; Figure 3 A cross-sectional view of the main frame portion of a feed coarse screening and separation device proposed by the present invention; Figure 4 A cross-sectional view of a coarse material outlet portion of a feed coarse screening and separation device proposed by the present invention; Figure 5 This is a schematic structural diagram of a secondary screening assembly of a feed coarse screening and separation device proposed by the present invention; Figure 6 An exploded view of a secondary screening assembly of a feed coarse screening and separation device proposed by the present invention; Figure 7 A side view of a re-screening assembly of a feed coarse screening and separation device proposed by the present invention; Figure 8 A schematic diagram of the structure of a screening component in a feed coarse screening and separation device proposed by the present invention Figure 1 ; Fig. 9 A side view of a screening component in a feed coarse screening separation device proposed by the present invention Figure 1 ; Fig.10 A schematic diagram of the structure of a screening component in a feed coarse screening and separation device proposed by the present invention Figure 2 ; Fig.11 A side view of a screening component in a feed coarse screening separation device proposed by the present invention Figure 2 .

[0020] In the figure: 1, leg; 2, frame body; 3, upper cover; 4, feeding port; 5, locking assembly; 6, limit rod; 7, buffer spring; 8, vibration motor; 9, fine material outlet; 10, coarse material outlet; 11, mounting frame; 12, screen; 13, guide plate; 14, re-screening assembly; 1401, rotating rod; 1402, end plate 1; 1403, external screening assembly; 1404, rotating ring; 1405, end plate 2; 1406 , inner screening component; 14061, fine screen component one; 14062, fine screen component two; 1407, feeding component; 1408, lever; 1409, feeding pipe; 15, inclined plate; 16, driving gear; 17, driven gear; 18, unloading plate; 19, feeding channel one; 20, opening one; 21, accommodating cavity; 22, opening two; 23, opening three; 24, feeding channel two; 25, opening four; 26, discharge port. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 a limitation on the present invention.

[0023] Reference Figure 1-Figure 11 , including a frame body 2 and a screen 12 arranged in the frame body 2, and also including: a guide plate 13 arranged at the bottom of the frame body 2, the guide plate 13 is located directly below the screen 12, and is used to receive the feed screened from the screen 12; a fine material outlet 9 and a coarse material outlet 10 are respectively provided on the frame body 2, the fine material outlet 9 is opposite to the guide plate 13, and is used to receive the feed on the guide plate 13, and the coarse material outlet 10 is opposite to the screen 12, and is used to receive the feed not screened by the screen 12; a re-screening component 14 is provided in the coarse material outlet 10, and the re-screening component 14 It includes an outer screening component 1403 and an inner screening component 1406. The inner screening component 1406 consists of a fine screen component 1 14061 and a fine screen component 2 14062. A feed pipe 1409 is provided inside the inner screening component 1406. The feed pipe 1409 is fixedly connected to the inner wall of the coarse material outlet 10. A feed component 1407 is provided on the feed pipe 1409. The feed component 1407 and the outer screening component 1403 are fixed on the same component. The feed pipe 1409 is used to transport the feed screened by the inner screening component 1406 into the fine material outlet 9.

[0024] In the present invention, the feed to be screened is poured onto the screen 12, and the feed is screened by the screen 12. The feed that meets the requirements falls on the guide plate 13 through the mesh of the screen 12, and is transported into the fine material outlet 9 through the guide plate 13, and the feed that does not meet the requirements falls into the coarse material outlet 10 through the screen 12. The outer screening component 1403 and the inner screening component 1406 re-screen the feed entering the coarse material outlet 10, and the feed that does not meet the requirements flows out through the outer screening component 1403, and the feed that meets the requirements is retained by the inner screening component 1406, and is transported into the fine material outlet 9 through the feeding pipe 1409.

[0025] The feeding assembly 1407 and the outer screening assembly 1403 are fixed on the same component so that the two can achieve synchronous rotation. The rotation direction of the inner screening assembly 1406 is opposite to that of the outer screening assembly 1403. The combination of the two can achieve screening more efficiently.

[0026] Reference Figure 1-Figure 11 The frame body 2 is provided with an upper cover 3, and a feeding port 4 is provided on the upper cover 3. The feeding port 4 is arranged at one end of the upper cover 3 away from the fine material outlet 9 and the coarse material outlet 10, and the upper cover 3 is fixed to the frame body 2 by a locking assembly 5; the frame body 2 is supported by the supporting legs 1, and the bottoms of the four ends of the frame body 2 are respectively fixedly connected to the limit rods 6, and the limit rods 6 are inserted in the supporting legs 1. A buffer spring 7 is provided between the frame body 2 and the supporting legs 1, and the buffer spring 7 is sleeved on the limit rod 6; a mounting frame 11 is provided in the frame body 2, and a screen 12 is installed on the mounting frame 11, and a guide plate 13 is inclined toward the fine material outlet 9 and the coarse material outlet 10, and a vibration motor 8 is provided at the bottom of the frame body 2; both ends of the external screening assembly 1403 are provided with end plates 1402, and a rotating Rod 1401 and feeding assembly 1407 are fixedly connected to end plate 1402; end plates 1405 are provided at both ends of the inner screening assembly 1406, and a rotating ring 1404 is fixedly connected to one end plate 1405 away from the rotating rod 1401, and a driven gear 17 is provided on the rotating ring 1404, and a driving gear 16 meshing with the driven gear 17 is provided on the inner wall of the coarse material outlet 10; a discharge port 26 is provided in the part of the feeding pipe 1409 placed outside the inner screening assembly 1406, and a discharge plate 18 for receiving feed falling from the discharge port 26 is fixedly connected to the inner wall of the coarse material outlet 10, and the discharge plate 18 is connected to the fine material outlet 9, and a shifting rod 1408 is provided on the end plate 1402, and the shifting rod 1408 is located between the outer screening assembly 1403 and the inner screening assembly 1406.

[0027] In the present invention, material is added to the screen 12 through the feeding port 4, and the sealing effect of the upper cover 3 can prevent dust from overflowing during the screening process and affecting the health of the workers; The vibration motor 8 is used to provide vibration to the screen 12 and is of conventional design, which will not be described in detail here; the limit rod 6 is slidably inserted into the support leg 1, and can then cooperate with the buffer spring 7 to filter vibration.

[0028] In one embodiment, the guide plate 13 is tilted toward the fine material outlet 9 and the coarse material outlet 10, so that the feed falling on the guide plate 13 can fall into the fine material outlet 9 more smoothly; A motor is provided on the outside and inside of the frame body 2. One of the two motors is used to drive the rotating rod 1401 to rotate, and the other is used to control the driving gear 16 to rotate. The driving gear 16 drives the driven gear 17 to rotate, and then the driven gear 17 drives the second end plate 1405 to rotate. A support frame is provided on the inner wall of the coarse material outlet 10 to further support the rotating ring 1404. The end of the feeding pipe 1409 is fixed to the inner wall of the coarse material outlet 10. The feeding assembly 1407 is a spiral conveying auger.

[0029] In one embodiment, the rotation direction of the inner screening component 1406 is opposite to that of the outer screening component 1403, so that the feed entering the interlayer between the inner screening component 1406 and the outer screening component 1403 will be subjected to two opposite forces from the inner screening component 1406 and the outer screening component 1403. Combined with the influence of the feed's own gravity, the feed can be better distributed on the inner screening component 1406. At the same time, combined with the stirring of the lever 1408, a more thorough separation of the feed can be achieved.

[0030] In one embodiment, a camera is installed above the feed plate 18 to identify the number of feed particles falling on the feed plate 18 through image processing technology, and a photoelectric sensor is installed on the side of the feed plate 18 to detect the frequency of feed falling by blocking the light path when feed particles pass by, thereby comprehensively analyzing the real-time feed discharging frequency. If the discharging frequency is large, it may be that the working efficiency of the screen 12 is not high. By adjusting the exciting force of the vibration motor 8, the processing capacity and screening efficiency of the screen 12 are increased, so that the screening efficiency and accuracy of the coarse screening device are further improved.

[0031] Reference Figure 8 and Fig. 9 The fine screen component 1 14061 and the fine screen component 2 14062 are arranged on the end plate 2 1405 in a circumferentially distributed arrangement, wherein the fine screen component 1 14061 is wound around the outer circle of the fine screen component 2 14062, and a fine screen component 2 14062 is provided between every two fine screen components 1 14061, and a material conveying channel 19 is formed between each adjacent fine screen component 1 14061 and fine screen component 2 14062.

[0032] In the present invention, the feed screened by the outer screening component 1403 falls into the interlayer formed between the outer screening component 1403 and the inner screening component 1406, wherein the feed meeting the requirements will fall onto the feeding pipe 1409 after being screened by the inner screening component 1406, and enter the concentrate outlet 9 through the feeding pipe 1409 and the feeding component 1407. refer to Fig. 9From the cross section, each of the two adjacent fine screen components 14061 and the fine screen component 2 14062 located between the two form an isosceles triangle, and the location of the fine screen component 2 14062 is the vertex of the isosceles triangle. In the isosceles triangle, the area between the fine screen component 1 14061 and the fine screen component 2 14062 is the material conveying channel 19, and the isosceles triangle located at the top is similar to a net; When feed falls into the interlayer between the outer screening component 1403 and the inner screening component 1406, especially when a large amount of feed falls, if Figure 7 As shown in the inner screening component 1406, a large amount of feed may not be screened out by the inner screening component 1406 in time, resulting in the omission of some feed that meets the requirements. Fig. 9 When a large amount of feed falls, the net formed by the two fine screen components 14061 and the one fine screen component 14062 on the top of the second end plate 1405 will contain the feed, thereby achieving better feed capture and avoiding omission. When the feed falls into the net, since the width of the feeding channel 19 is set to only allow feed that meets the requirements to pass through, the feed that meets the requirements is screened out in the net bag, falls on the feeding pipe 1409, and is finally transported away by the feeding component 1407. When the second end plate 1405 rotates downward, the feed that does not meet the requirements placed in the net bag will automatically fall out due to the action of centrifugal force and gravity, and then be screened out through the external screening component 1403.

[0033] Reference Fig.10 and Fig.11 The fine screen component 1 14061 and the fine screen component 2 14062 are arranged on the end plate 2 1405 in a circular distribution, wherein the fine screen component 1 14061 and the fine screen component 2 14062 are crescent-shaped curved plates symmetrically arranged with each other, and the two fine screen components 1 14061 and the fine screen component 2 14062 symmetrically arranged with each other form a group of screen elements, and the screen elements are provided with multiple groups, and the fine screen components 1 14061 and the fine screen component 2 14062 symmetrically arranged with each other form an open space with an interior accommodating cavity 21 and an opening 1 20 and an opening 2 22 at both ends respectively, and the multiple groups of screen elements are also arranged on the end plate 2 1405 in a circular distribution, and the fine screen components 1 14061 and the fine screen component 2 14062 adjacent to each two groups of screen elements form a channel with a feed channel 2 24 in the middle and openings 3 23 and 4 25 at both ends.

[0034] In the present invention, when a large flow of feed appears, the accommodating cavity 21 and the opening three 23 will both grab the feed. The opening one 20 of the accommodating cavity 21 is a wide opening that can accommodate large particles and large agglomerates of feed. Since the end plate two 1405 is rotating, the feed in the accommodating cavity 21 is always in a state of shaking and colliding. Such a shaking and colliding state can further separate large particles and small particles of feed, and then screen the small particles that meet the requirements through the opening two 22 to the feeding pipe 1409. If there is a lot of feed in the accommodating cavity 21, when the end plate two 1405 rotates the accommodating cavity 21 to the opening one 20 facing downward, due to the adsorption force and friction between the feeds and the obstruction of external feeds, the feed in the accommodating cavity 21 will not be dumped out, but will be slowly thrown out after multiple rotation cycles. In multiple rotation cycles, the feed in the accommodating cavity 21 is always in a state of shaking and colliding, and then the large particles and small particles of feed are further separated.

[0035] Furthermore, the third opening 23 can also accommodate feed. Due to the width limitation of the second feeding channel 24, large feed particles can be prevented from entering the feeding tube 1409, and only small feed particles that meet the requirements can be allowed to enter. At the same time, the fourth opening 25 is a large width opening, so that the feed passing through the second feeding channel 24 will not be blocked at the outlet, and smooth feeding can be achieved; The fine screen component 1 14061 and the fine screen component 2 14062 are crescent-shaped curved plates that are symmetrically arranged with their ends converging to each other, which can provide more collision barriers and also serve as barriers for the feed to be thrown out of the containing cavity 21, allowing the feed to be fully separated inside the containing cavity 21.

[0036] Reference Figure 1-Figure 11 A method for using a feed coarse screening and separation device mainly comprises the following steps: S1, pouring the feed to be screened onto the screen 12 through the feed inlet 4, and screening the feed through the screen 12; S2, the feed that meets the requirements falls onto the guide plate 13 through the mesh of the screen 12, and is transported to the concentrate outlet 9 through the guide plate 13; S3, feed that does not meet the requirements falls into the coarse material outlet 10 through the screen 12; S4, the outer screening component 1403 and the inner screening component 1406 re-screen the feed entering the coarse material outlet 10, and the feed that does not meet the requirements flows out through the outer screening component 1403; S5. The feed that meets the requirements is retained by the inner screening component 1406 and is transported to the concentrate outlet 9 through the feeding component 1407 and the feeding pipe 1409.

[0037] The above description 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 feed coarse screening and separation device, comprising a frame body (2) and a screen (12) arranged in the frame body (2), characterized in that: Also includes: A material guide plate (13) is arranged at the bottom of the frame body (2), wherein the material guide plate (13) is located directly below the screen (12) and is used to receive feed sieved from the screen (12); The frame body (2) is provided with a fine material outlet (9) and a coarse material outlet (10), respectively; the fine material outlet (9) is opposite to the guide plate (13) and is used to receive feed on the guide plate (13); the coarse material outlet (10) is opposite to the screen (12) and is used to receive feed not screened by the screen (12); A rescreening assembly (14) is provided in the coarse material outlet (10), the rescreening assembly (14) comprising an outer screening assembly (1403) and an inner screening assembly (1406), the inner screening assembly (1406) comprising a fine screen assembly 1 (14061) and a fine screen assembly 2 (14062); A feed pipe (1409) is provided inside the inner screening component (1406), and the feed pipe (1409) is fixedly connected to the inner wall of the coarse material outlet (10). A feed pipe (1407) is provided on the feed pipe (1409), and the feed pipe (1407) and the outer screening component (1403) are fixed on the same component. The feed pipe (1409) is used to transport the feed screened by the inner screening component (1406) into the fine material outlet (9).

2. A feed coarse screening and separation device according to claim 1, characterized in that: The frame body (2) is provided with an upper cover (3), the upper cover (3) is provided with a feeding port (4), the feeding port (4) is arranged at an end of the upper cover (3) away from the fine material outlet (9) and the coarse material outlet (10), and the upper cover (3) is fixed to the frame body (2) by a locking assembly (5).

3. A feed coarse screening and separation device according to claim 1, characterized in that: The frame body (2) is supported by the supporting legs (1); the bottoms of the four ends of the frame body (2) are respectively fixedly connected to limit rods (6); the limit rods (6) are inserted into the supporting legs (1); a buffer spring (7) is provided between the frame body (2) and the supporting legs (1); the buffer spring (7) is sleeved on the limit rods (6).

4. A feed coarse screening and separation device according to claim 1, characterized in that: A mounting frame (11) is provided in the frame body (2), the screen (12) is mounted on the mounting frame (11), the guide plate (13) is arranged to be inclined toward the fine material outlet (9) and the coarse material outlet (10), a vibration motor (8) is provided at the bottom of the frame body (2), and an inclined plate (15) is provided at an end of the mounting frame (11) close to the coarse material outlet (10).

5. A feed coarse screening and separation device according to claim 1, characterized in that: Both ends of the outer screening component (1403) are provided with an end plate one (1402), a rotating rod (1401) is fixedly connected to the end plate one (1402), and the feeding component (1407) is fixedly connected to the end plate one (1402).

6. A feed coarse screening and separation device according to claim 5, characterized in that: End plates (1405) are provided at both ends of the inner screening component (1406); a rotating ring (1404) is fixedly connected to one end plate (1405) away from the rotating rod (1401); a driven gear (17) is provided on the rotating ring (1404); and a driving gear (16) meshing with the driven gear (17) is provided on the inner wall of the coarse material outlet (10).

7. A feed coarse screening and separation device according to claim 6, characterized in that: The portion of the feed pipe (1409) disposed outside the inner screening assembly (1406) is provided with a discharge port (26); a discharge plate (18) for receiving feed dropped from the discharge port (26) is fixedly connected to the inner wall of the coarse material outlet (10); the discharge plate (18) is communicated with the fine material outlet (9); a lever (1408) is provided on the first end plate (1402); the lever (1408) is located between the outer screening assembly (1403) and the inner screening assembly (1406).

8. A feed coarse screening and separation device according to claim 6, characterized in that: The fine screen component 1 (14061) and the fine screen component 2 (14062) are both arranged on the end plate 2 (1405) in a circumferentially distributed arrangement, wherein the fine screen component 1 (14061) is arranged around the outer ring of the fine screen component 2 (14062), and a fine screen component 2 (14062) is provided between every two fine screen components 1 (14061), and a material conveying channel 1 (19) is formed between each adjacent fine screen component 1 (14061) and fine screen component 2 (14062).

9. A feed coarse screening and separation device according to claim 8, characterized in that: The fine screen component 1 (14061) and the fine screen component 2 (14062) are both arranged in a circumferential distribution on the end plate 2 (1405), wherein the fine screen component 1 (14061) and the fine screen component 2 (14062) are crescent-shaped curved plates symmetrically arranged with each other, and the two symmetrically arranged fine screen components 1 (14061) and the fine screen component 2 (14062) are a group of screen elements, and the screen elements are provided with multiple groups, and the symmetrically arranged fine screen components 1 (1 The first and second fine screen assemblies (14061 and 14062) form an open space with a cavity (21) inside and openings 1 (20) and 2 (22) at both ends. The plurality of groups of sieves are also arranged on the second end plate (1405) in a circular distribution. The adjacent fine screen assemblies 1 (14061) and 2 (14062) between each two groups of sieves form a channel with a feed channel 2 (24) in the middle and openings 3 (23) and 4 (25) at both ends.

10. A method for using a feed coarse screening and separation device, comprising the feed coarse screening and separation device according to claim 1, mainly comprising the following steps: S1, pouring the feed to be screened onto the screen (12), and screening the feed through the screen (12); S2, the feed meeting the requirements passes through the mesh of the screen (12) and falls onto the guide plate (13), and the feed meeting the requirements is transported to the concentrate outlet (9) through the guide plate (13); S3, feed that does not meet the requirements passes through the screen (12) and falls into the coarse material outlet (10); S4, the outer screening component (1403) and the inner screening component (1406) re-screen the feed entering the coarse material outlet (10), and the feed that does not meet the requirements flows out through the outer screening component (1403); S5. Feed that meets the requirements is retained by the internal screening component (1406), and is transported to the concentrate outlet (9) through the feeding pipe (1409).

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