Feed coarse screening and separation device and method

Abstract

The present invention discloses a feed coarse screening and separation device and method, which belongs to the technical field of feed processing equipment. A feed coarse screening and separation device includes a frame body and a screen arranged in the frame body, and also includes: a material guide plate arranged at the bottom of the frame body, the material guide plate is located directly below the screen, and is used to receive feed screened from the screen; the frame body is respectively provided with a fine material outlet and a coarse material outlet, the fine material outlet is opposite to the material guide plate, and is used to receive feed on the material guide plate, and the coarse material outlet is opposite to the screen, and is used to receive feed not screened by the screen; the present invention can repeatedly screen the feed to avoid mutual interference and entrainment between feed particles of different particle sizes, and at the same time, by setting a monitoring device to detect the material drop rate on the feed drop plate to feedback and adjust the screening parameters, thereby achieving high-efficiency screening.

Description

Technical Field

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

[0002] In the herbivore feed processing industry, coarse screening is an essential and critical step in the production process. Its purpose is to initially remove impurities and particles that do not meet particle size requirements from the raw materials, laying the foundation for subsequent fine processing. Common impurities include incompletely crushed straw, corn cobs, and forage. However, traditional feed coarse screening devices often have problems during the screening process. In particular, when processing mixed feed ingredients with larger particle sizes, it is easy to cause excessive amounts of small feed particles to be mixed with larger particles. This phenomenon not only affects the uniformity and quality of the feed, but can also cause blockage and wear of subsequent processing equipment, reducing overall production efficiency and product quality.

[0003] Specifically, the design of traditional coarse screening devices often focuses on screening within a single particle size range, ignoring the interference and entrainment between particles of different sizes. Furthermore, factors such as the screen aperture, screening method, and vibration parameters during the screening process can also affect the screening effect. When the screen aperture is too large, small particles can easily pass through the screen along with larger particles, 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 the actual screening effect, thereby 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:

[0007] The sieve is provided with a feed pipe, the feed pipe being fixedly connected to the inner wall of the sieve, the feed pipe being provided with a feed assembly, the feed assembly and the outer sieve assembly being fixed on the same component, the feed pipe being used to transport the feed sieved by the inner sieve assembly into the sieve.

[0008] Preferably, the frame body is provided with an upper cover, the upper cover is provided with a feeding port, 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.

[0009] Preferably, the frame body is supported by supporting legs, and the bottoms of the four ends of the frame body are respectively fixedly connected to limit rods, and the limit rods are inserted into the supporting legs. A buffer spring is provided between the frame body and the supporting legs, and the buffer spring is sleeved on the limit rod.

[0010] Preferably, a mounting frame is provided in the frame body, the screen is mounted on the mounting frame, the material guide plate is tilted toward the fine material outlet and the coarse material outlet, and a vibration motor is provided at the bottom of the frame body.

[0011] Preferably, both ends of the outer screening assembly are provided with an end plate 1, a rotating rod is fixedly connected to the end plate 1, and the feeding assembly is fixedly connected to the end plate 1.

[0012] 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.

[0013] Furthermore, a discharge port is provided on the part of the feed pipe outside the inner screening assembly, and a discharge plate for receiving feed falling from the discharge port is fixedly connected to the inner wall of the coarse material outlet, and the discharge plate is connected to the fine material outlet. A shift rod is provided on the end plate, and the shift rod is located between the outer screening assembly and the inner screening assembly.

[0014] Preferably, the fine screen component 1 and the fine screen component 2 are both arranged on the end plate 2 in a circumferential distribution, wherein the fine screen component 1 is wrapped around the outer ring of the fine screen component 2, and a fine screen component 2 is provided between every two fine screen components 1, and a material conveying channel 1 is formed between each adjacent fine screen component 1 and fine screen component 2.

[0015] Furthermore, the fine screen component 1 and the fine screen component 2 are both arranged in a circular distribution on the end plate 2, wherein the fine screen component 1 and the fine screen component 2 are crescent-shaped curved plates symmetrically arranged with each other, and the two symmetrically arranged fine screen components 1 and 2 form a group of screen elements, and the screen elements are provided in multiple groups, and the symmetrically arranged fine screen component 1 and the fine screen component 2 form an open space with an interior cavity and openings 1 and 2 at both ends respectively. The multiple groups of screen elements are also arranged in a circular distribution on the end plate 2, and the adjacent fine screen components 1 and 2 between each two groups of screen elements form a channel with a feed channel 2 in the middle and openings 3 and 4 at both ends.

[0016] A method for using a feed coarse screening and separation device mainly comprises the following steps:

[0017] S1. Pour the feed to be screened onto the screen and screen the feed through the screen;

[0018] 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;

[0019] S3. Feed that does not meet the requirements falls through the screen into the coarse material outlet;

[0020] 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;

[0021] 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.

[0022] Compared with the prior art, the present invention provides a feed coarse screening and separation device, which has the following beneficial effects:

[0023] 1. The feed coarse screening and separation device uses the screen and the re-screening component for multiple screening, and the fine screen component 1 and the fine screen component 2 to redistribute and disrupt the feed. It can separate and screen feeds of different particle sizes that interfere with each other or are entrained, thus avoiding incomplete screening.

[0024] 2. The feed coarse screening and separation device is equipped with monitoring equipment to detect the material falling rate on the discharge plate to feedback and adjust the screening parameters, thereby improving the screening efficiency and accuracy.

[0025] The parts not involved in the feed coarse screening and separation device are the same as those in the prior art or can be implemented using the prior art. 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 adjusted to feedback, thereby achieving high-efficiency screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a feed coarse screening and separation device proposed by the present invention;

[0027] 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;

[0028] Figure 3 This is a cross-sectional view of the main frame portion of a feed coarse screening and separation device proposed by the present invention;

[0029] Figure 4 This is a cross-sectional view of the coarse material outlet portion of a feed coarse screening and separation device proposed by the present invention;

[0030] 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;

[0031] Figure 6 This is an exploded view of the secondary screening assembly of a feed coarse screening and separation device proposed by the present invention;

[0032] Figure 7 This is a side view of a secondary screening assembly of a feed coarse screening and separation device proposed by the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the screening component in the feed coarse screening separation device proposed by the present invention. Figure 1 ;

[0034] Figure 9 A side view of the screening component in a feed coarse screening separation device proposed by the present invention Figure 1 ;

[0035] Figure 10 This is a schematic diagram of the structure of the screening component in the feed coarse screening separation device proposed by the present invention. Figure 2 ;

[0036] Figure 11 A side view of the screening component in a feed coarse screening separation device proposed by the present invention Figure 2 .

[0037] Figure: 1, support 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, outer screening assembly; 1404, rotating ring; 1405, end plate 2; 1406 , internal screening component; 14061, fine screen component one; 14062, fine screen component two; 1407, feeding component; 1408, shift rod; 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

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described 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.

[0039] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0040] Reference Figures 1-11 , 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; the frame body 2 is respectively provided with a fine material outlet 9 and a coarse material outlet 10, 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 feeding pipe 1409 is provided in the inner screening component 1406. The feeding pipe 1409 is fixedly connected to the inner wall of the coarse material outlet 10. A feeding component 1407 is provided on the feeding pipe 1409. The feeding component 1407 and the outer screening component 1403 are fixed on the same component. The feeding pipe 1409 is used to transport the feed screened by the inner screening component 1406 into the fine material outlet 9.

[0041] 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 onto 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. 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. 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.

[0042] The feeding assembly 1407 and the outer screening assembly 1403 are fixed on the same component so that the two can rotate synchronously. 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 more efficient screening.

[0043] Reference Figures 1-11 , the frame body 2 is provided with an upper cover 3, and the upper cover 3 is provided with a feeding port 4. 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 support 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 support legs 1. A buffer spring 7 is provided between the frame body 2 and the support 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 the screen 12 is installed on the mounting frame 11, and the guide plate 13 is tilted 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 outer screening component 1403 are provided with an end plate 1402, and the end plate 1402 is fixedly connected with a rotating Rod 1401 and feeding assembly 1407 are fixedly connected to end plate 1402; end plate 2 1405 is provided at both ends of the inner screening assembly 1406, and a rotating ring 1404 is fixedly connected to the end plate 2 1405 away from the rotating rod 1401, and the rotating ring 1404 is provided with a driven gear 17, and the inner wall of the coarse material outlet 10 is provided with a driving gear 16 that meshes with the driven gear 17; the feeding pipe 1409 is placed outside the inner screening assembly 1406 and is provided with a discharge port 26, 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 shift rod 1408 is provided on the end plate 1402, and the shift rod 1408 is located between the outer screening assembly 1403 and the inner screening assembly 1406.

[0044] In the present invention, the 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;

[0045] The vibration motor 8 is used to provide vibration to the screen 12. It is of conventional design and 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.

[0046] In one embodiment, the guide plate 13 is tilted toward the concentrate outlet 9 and the coarse feed outlet 10 so that the feed falling on the guide plate 13 can fall into the concentrate outlet 9 more smoothly.

[0047] A motor is provided on the outside and inside of the frame body 2. One motor is used to drive the rotating rod 1401 to rotate, and the other is used to control the rotation of the driving gear 16. The driving gear 16 drives the driven gear 17 to rotate, and then the driven gear 17 drives the end plate 2 1405 to rotate. A support bracket 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.

[0048] The feeding assembly 1407 is a spiral conveying auger.

[0049] 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.

[0050] In one embodiment, a camera is installed above the blanking plate 18 to identify the number of feed particles falling on the blanking plate 18 through image processing technology, and a photoelectric sensor is installed on the side of the blanking plate 18 to detect the frequency of feed falling by blocking the light path when the 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.

[0051] Reference Figure 8 and Figure 9 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 is wound 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 19 is formed between each adjacent fine screen component 1 14061 and fine screen component 2 14062.

[0052] In the present invention, the feed screened by the outer screening assembly 1403 falls into the interlayer formed between the outer screening assembly 1403 and the inner screening assembly 1406. The feed that meets the requirements will be screened by the inner screening assembly 1406 and fall onto the feeding pipe 1409. The feed is then pushed into the concentrate outlet 9 by the feeding pipe 1409 and the feeding assembly 1407.

[0053] refer to Figure 9 From a cross-sectional view, each adjacent two fine screen assemblies 14061 and a fine screen assembly 2 14062 located therebetween form an isosceles triangle. The location of the fine screen assembly 2 14062 is the vertex of the isosceles triangle. In the isosceles triangle, the area between the fine screen assembly 1 14061 and the fine screen assembly 2 14062 is the feed channel 19. The isosceles triangle located at the top is similar to a net.

[0054] When the feed falls into the interlayer between the outer screening component 1403 and the inner screening component 1406, especially when the feed with a large flow rate 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. Figure 9 When a large amount of feed falls, the net formed by the two fine screen components 14061 and the one fine screen component 2 14062 on the top of the end plate 2 1405 will accommodate the feed, thereby achieving better feed capture and avoiding omissions. 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. 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 when the end plate 2 1405 rotates downward, and then be screened out through the external screening component 1403.

[0055] Reference Figure 10 and Figure 11The fine screen component 1 14061 and the fine screen component 2 14062 are arranged in a circular 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 arranged symmetrically with each other, and the two symmetrically arranged fine screen components 1 14061 and the fine screen component 2 14062 form a group of screen elements, and the screen elements are provided with multiple groups, and the symmetrically arranged fine screen components 1 14061 and the fine screen component 2 14062 form an open space with an interior accommodating cavity 21 and an opening 1 20 and an opening 2 22 at both ends respectively. The multiple groups of screen elements are also arranged in a circular distribution on the end plate 2 1405, and the adjacent fine screen components 1 14061 and the fine screen component 2 14062 between each two groups of screen elements form a channel with a feed channel 2 24 in the middle and openings 3 23 and openings 4 25 at both ends.

[0056] In the present invention, when a large flow of feed occurs, both the accommodating cavity 21 and the opening three 23 will capture the feed. The opening one 20 of the accommodating cavity 21 is a wide opening that can accommodate large particles and large lumps 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 shaking and colliding state can further separate large particles from 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 face the opening one 20 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, thereby further separating large particles from small particles of feed.

[0057] 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 wide 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.

[0058] The fine screen component 1 14061 and the fine screen component 2 14062 are crescent-shaped curved plates arranged symmetrically with each other, and their ends converge with each other, which can provide more collision resistance and also serve as a throw-out resistance for the feed in the receiving cavity 21, allowing the feed to be fully separated in the receiving cavity 21.

[0059] Reference Figures 1-11 A method for using a feed coarse screening and separation device mainly comprises the following steps:

[0060] S1, pouring the feed to be screened onto the screen 12 through the feeding port 4, and screening the feed through the screen 12;

[0061] S2. The feed that meets the requirements passes through the mesh of the screen 12 and falls onto the guide plate 13. The feed that meets the requirements is transported to the concentrate outlet 9 through the guide plate 13.

[0062] S3, feed that does not meet the requirements passes through the screen 12 and falls into the coarse material outlet 10;

[0063] 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;

[0064] S5. The feed that meets the requirements is retained by the inner screening component 1406 and is transported into the concentrate outlet 9 through the feeding component 1407 and the feeding pipe 1409.

[0065] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection 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 provided at the bottom of the frame body (2), wherein the material guide plate (13) is located directly below 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 the coarse material outlet (10) is opposite to the screen (12). A re-screening assembly (14) is provided in the coarse material outlet (10), the re-screening 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 feeding pipe (1409) is provided in the inner screening component (1406), and the feeding pipe (1409) is fixedly connected to the inner wall of the coarse material outlet (10). A feeding component (1407) is provided on the feeding pipe (1409), and the feeding component (1407) and the outer screening component (1403) are fixed on the same component. The feeding pipe (1409) is used to transport the feed screened by the inner screening component (1406) into the fine material outlet (9); Wherein, the fine screen component 1 (14061) and the fine screen component 2 (14062) are crescent-shaped curved plates that are symmetrically arranged with each other, and the two symmetrically arranged fine screen components 1 (14061) and fine screen components 2 (14062) form a group of screen elements, and the screen elements are provided in multiple groups. The fine screen components 1 (14061) and the fine screen components 2 (14062) that are symmetrically arranged with each other form an open space with an internal cavity (21) and an opening 1 (20) and an opening 2 (22) at both ends.

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), and the upper cover (3) is provided with a feeding port (4). 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). The upper cover (3) is fixed to the frame body (2) via 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), and the bottoms of the four ends of the frame body (2) are respectively fixedly connected to limit rods (6), and 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), and 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 tilted 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 the end of the mounting frame (11) near 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 1 (1402), a rotating rod (1401) is fixedly connected to the end plate 1 (1402), and the feeding component (1407) is fixedly connected to the end plate 1 (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 assembly (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) located outside the inner screening assembly (1406) is provided with a discharge port (26); a discharge plate (18) is fixedly connected to the inner wall of the coarse material outlet (10) for receiving feed dropped from the discharge port (26); the discharge plate (18) is communicated with the fine material outlet (9); a shifting rod (1408) is provided on the end plate (1402); the shifting rod (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 circumferential distribution, wherein the fine screen component 1 (14061) is wound 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), and multiple groups of the screen elements are also arranged in a circumferential distribution on the end plate 2 (1405). The adjacent fine screen components 1 (14061) and the fine screen component 2 (14062) between each two groups of the screen elements 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 that meets the requirements passes through the mesh of the screen (12) and falls onto the guide plate (13), and the feed that meets 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. 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 pipe (1409).

Images