A cylinder type grain recovery device
The two-stage separation design and spiked tooth structure of the drum-type grain recovery device solve the problem of separating grains from impurities, achieving efficient grain recovery, reducing field loss rate, and improving the stability and applicability of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHIJIAZHUANG TIANREN AGRI MASCH EQUIP CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-06-02
AI Technical Summary
In existing grain recovery technologies, it is difficult to effectively separate grains from debris, resulting in a high grain loss rate in the field, which affects the quality and yield of crop harvest.
The device employs a drum-type grain recovery unit, which is designed with a pre-separation chamber and a main separation chamber. Separating augers and separating drums are installed respectively. Multiple toothed structures rotate under the drive of the transmission mechanism to achieve two-stage separation. Combined with a three-stage screen and a transition separation chamber, the separation efficiency is improved.
It significantly improves the separation efficiency of grains and impurities, reduces the grain loss rate in the field, enhances the stability and applicability of the device, and meets the needs of modern agriculture for efficient and precise production.
Smart Images
Figure CN224309007U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of agricultural machinery technology, and more specifically, it relates to a drum-type grain recycling device. Background Technology
[0002] In modern agricultural production, grain recycling plays a vital role in improving crop harvesting efficiency and reducing grain loss.
[0003] Currently, the most common grain recovery technologies on the market mainly employ two methods: auger rotary propulsion and vibrating screen separation. The auger rotary propulsion method uses the rotation of an auger to push grains and debris into the recovery device together; the vibrating screen separation method uses the vibration of the screen to separate grains and debris during the vibration process. However, both technologies have significant drawbacks. In actual operation, the auger rotation cannot accurately distinguish between grains and debris, and the vibrating screen cannot completely separate fine grains from debris. This results in a large amount of grain being mixed with debris and unable to be effectively recovered, leading to a high grain loss rate in the field. This seriously affects the harvest quality and yield of crops and fails to meet the high-efficiency and precise production requirements of modern agriculture. Utility Model Content
[0004] The purpose of this invention is to provide a roller-type grain recovery device, which aims to solve the problem that a large number of grains are mixed in with debris and cannot be effectively recovered, resulting in a high grain loss rate in the field, which seriously affects the harvest quality and yield of crops.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a drum-type grain recycling device is provided, including a frame body, a pre-separation chamber and a main separation chamber that are connected in sequence are respectively arranged inside the frame body, a transmission mechanism is arranged outside the frame body, and a waste discharge port connected to the main separation chamber is arranged on one side of the frame body;
[0006] The pre-separation chamber is provided with a feed inlet at the top, a first screen at the bottom, and a separation auger inside, with multiple first nail teeth spaced apart along the axial direction.
[0007] A second screen is provided at the bottom of the main separation chamber, a separation roller is provided inside the main separation chamber, and a plurality of second nail teeth are provided on the outer periphery of the separation roller;
[0008] The transmission mechanism is used to drive the separating auger and the separating drum to rotate, so as to drive the mixture through the pre-separation chamber and the main separation chamber in sequence.
[0009] In one possible implementation, the pre-separation chamber and the main separation chamber are arranged side by side, and the top of the main separation chamber is provided with an upper cover plate, which is inclined downward toward the feed inlet.
[0010] In one possible implementation, a transition separation chamber is provided at the same end of the pre-separation chamber and the main separation chamber. The transition separation chamber is located at the end of the main separation chamber away from the waste discharge port. The separation auger and the separation drum both extend into the transition separation chamber. A third screen is provided at the lower end of the transition separation chamber.
[0011] In one possible implementation, the first screen is located above the second screen, and the third screen is inclined downwards from the first screen toward the second screen.
[0012] In one possible implementation, a first rotating shaft is provided in the middle of the separating auger, and a plurality of first spikes are axially spaced on the first rotating shaft, with two adjacent first spikes arranged opposite each other on both sides of the first rotating shaft.
[0013] In one possible implementation, the separating drum includes a guide auger and a second rotating shaft coaxially connected. The guide auger is located on the side of the second rotating shaft away from the waste discharge port. The second rotating shaft is circumferentially provided with a plurality of coaxial rods, and a plurality of second spike teeth are respectively disposed on the plurality of coaxial rods and extend radially outward.
[0014] In one possible implementation, the guide auger includes a conical guide cylinder, the outer diameter of which increases from away from the second rotation axis toward the second rotation axis, and a helical impeller is formed on the outer periphery of the conical guide cylinder.
[0015] In one possible implementation, one end of the plurality of coaxial rods is vertically fixed to the end face of the tapered guide cylinder near the second rotating shaft, and a support disk is fitted on the second rotating shaft. The circumferential edge of the support disk has a plurality of positioning grooves for supporting the plurality of coaxial rods.
[0016] In one possible implementation, the two support disks are respectively disposed in the middle of the second rotating shaft and at one end of the second rotating shaft near the waste discharge port, and the support disks are provided with a plurality of process holes in the circumferential direction.
[0017] In one possible implementation, both the first screen and the second screen are arc-shaped screens with a concave center.
[0018] The beneficial effects of the drum-type grain recycling device provided by this utility model are as follows: Compared with the prior art, when this drum-type grain recycling device is working, the mixture containing grains and impurities enters the pre-separation chamber through the feed inlet. The separating auger in the pre-separation chamber rotates under the drive of the transmission mechanism, and its axially spaced first spikes continuously agitate the mixture, causing larger impurities to be initially separated. Simultaneously, lighter impurities are thrown up during the agitation, while the grains fall below through the first screen under gravity, completing the initial pre-separation. The pre-separated material then enters the main separation chamber, where the separating drum rotates at high speed under the drive of the transmission mechanism. Multiple second spikes on its outer periphery further separate the material. The high-speed rotation of the second spikes generates strong centrifugal and agitating forces, further dispersing the material. The grains pass through the second screen under the combined action of centrifugal force and gravity, while the separated impurities are directly discharged into the field through the waste outlet.
[0019] This utility model provides a drum-type grain recovery device with a two-stage separation design of a pre-separation chamber and a main separation chamber, which significantly improves the separation efficiency of grains and impurities. Compared with traditional single separation methods, it can more thoroughly separate grains and reduce grain loss rates in the field. The spiked tooth structure on the separating auger and separating drum enhances the mixing and separation capabilities of the material, especially for separating fine grains and impurities. This drum-type grain recovery device improves the overall stability and reliability of grain recovery devices, better meeting the needs of efficient and precise production in modern agriculture. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 A perspective view of a drum-type grain recycling device provided by this utility model;
[0022] Figure 2 A top view of a drum-type grain recycling device provided by this utility model;
[0023] Figure 3 A side view of a drum-type grain recycling device provided by this utility model;
[0024] Figure 4 A perspective view of the separating roller provided by this utility model.
[0025] In the diagram: 1. Main frame; 2. Transmission mechanism; 3. Waste discharge cylinder; 4. Waste discharge port; 5. First screen; 6. Separating auger; 7. First nail tooth; 8. Separating drum; 9. Upper cover plate; 10. Third screen; 11. First rotating shaft; 12. Second rotating shaft; 13. Coaxial rod; 14. Second nail tooth; 15. Conical guide cylinder; 16. Support plate; 17. Process hole. Detailed Implementation
[0026] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0027] Unless otherwise explicitly specified, the use of terms such as "first," "second," or "third" is intended to distinguish different objects, not to describe a specific order.
[0028] Unless otherwise expressly defined, the use of directional terms such as “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “back,” “left,” “right,” “clockwise,” “counterclockwise,” “high,” and “low” to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of the present invention.
[0029] Please see Figures 1 to 4 The present invention provides a drum-type grain recycling device. The drum-type grain recycling device includes a frame body 1, with a pre-separation chamber and a main separation chamber sequentially connected inside the frame body 1. A transmission mechanism 2 is provided outside the frame body 1, and a waste discharge port 4 connected to the main separation chamber is provided on one side of the frame body 1. A feed inlet is provided at the top of the pre-separation chamber, a first screen 5 is provided at the bottom of the pre-separation chamber, and a separation auger 6 is provided inside the pre-separation chamber, with multiple first nail teeth 7 spaced axially along the auger 6. A second screen (not shown in the figure) is provided at the bottom of the main separation chamber, and a separation drum 8 is provided inside the main separation chamber, with multiple second nail teeth 14 on the outer periphery of the separation drum 8. The transmission mechanism 2 drives the separation auger 6 and the separation drum 8 to rotate, thereby causing the mixture to sequentially pass through the pre-separation chamber and the main separation chamber.
[0030] This utility model provides a drum-type grain recovery device. Compared with the prior art, when this drum-type grain recovery device is working, the mixture containing grains and impurities enters the pre-separation chamber through the feed inlet. The separating auger 6 in the pre-separation chamber rotates under the drive of the transmission mechanism 2, and its axially spaced first spikes 7 continuously agitate the mixture, causing larger impurities to be initially separated. Simultaneously, lighter impurities are thrown up during the agitation, while the grains fall below through the first screen 5 under gravity, completing the initial pre-separation. The pre-separated material then enters the main separation chamber, where the separating drum 8 rotates at high speed under the drive of the transmission mechanism 2. Multiple second spikes 14 on its outer periphery further separate the material. The high-speed rotation of the second spikes 14 generates strong centrifugal force and agitation force, further dispersing the material. The grains pass through the second screen under the combined action of centrifugal force and gravity, while the separated impurities are directly discharged into the field through the waste outlet 4.
[0031] This utility model provides a drum-type grain recovery device with a two-stage separation design of a pre-separation chamber and a main separation chamber, which significantly improves the separation efficiency of grains and impurities. Compared with traditional single separation methods, it can more thoroughly separate grains and reduce grain loss rate in the field. The spiked tooth structure on the separating auger 6 and the separating drum 8 enhances the mixing and separation capabilities of the material, especially for the separation of fine grains and impurities. This drum-type grain recovery device improves the overall stability and reliability of the grain recovery device, better meeting the needs of efficient and precise production in modern agriculture.
[0032] Among them, a waste discharge cylinder 3 is installed on one side of the main frame 1. The upper end of the waste discharge cylinder 3 is connected to the main separation chamber mentioned above, and the lower end of the waste discharge cylinder 3 forms a waste discharge port 4. The separated debris is discharged directly into the field through the waste discharge cylinder 3 from the waste discharge port 4 at its lower end.
[0033] Please see Figures 1 to 2The pre-separation chamber and the main separation chamber are arranged side by side. Compared with the traditional series structure, this arrangement significantly shortens the material transmission path within the device, reduces material conveying time, and allows the material to enter the main separation chamber more quickly after pre-separation, thereby improving overall processing efficiency. Simultaneously, this layout makes the device structure more compact, occupies less space, and is easier to install on different types of agricultural machinery, improving the device's applicability. The upper cover 9 at the top of the main separation chamber slopes downwards towards the feed inlet. On one hand, the inclined upper cover 9 guides the material entering the main separation chamber from the pre-separation chamber to fall more smoothly into the main separation chamber, preventing material accumulation at the inlet and ensuring continuous material flow, thus improving separation efficiency. On the other hand, the inclined structure makes the airflow within the main separation chamber smoother, helping to quickly discharge small impurities thrown out by the separating roller 8, reducing impurity residue in the main separation chamber and further improving the separation effect. Furthermore, the inclined design of the upper cover 9 can also reduce energy loss caused by material rebound and splashing within the main separation chamber, improving energy utilization efficiency and reducing equipment operating costs.
[0034] Please see Figure 2 A transition separation chamber is provided at the same end of the pre-separation chamber and the main separation chamber. The transition separation chamber is located at the end of the main separation chamber away from the waste discharge port 4. The separation auger 6 and the separation drum 8 both extend into the transition separation chamber. A third screen 10 is provided at the lower end of the transition separation chamber.
[0035] First, the transition separation chamber acts as a buffer and secondary enhanced separation mechanism, bridging the gap between the pre-separation chamber and the transition separation chamber. The material initially processed in the pre-separation chamber enters the transition separation chamber, where the auger 6 and the extended section of the separation drum 8 continue to stir and separate the material. Because the material has additional processing space and time in the transition separation chamber, materials that were not fully separated in the pre-separation chamber can be further processed. The third screen 10 intercepts incompletely separated impurities, allowing more grains to be screened out, effectively reducing grain loss and greatly improving the purity of grain recovery and the overall separation effect.
[0036] Secondly, the existence of the transition separation chamber makes the transfer of materials from the pre-separation chamber to the main separation chamber more stable and orderly, avoiding the accumulation and blockage of materials due to sudden changes in direction or transmission method, ensuring the continuity of the entire grain recycling process, thereby improving the working efficiency and stability of the device.
[0037] Thirdly, it enhances the versatility and adaptability of the equipment. The design of the transition separation chamber can be flexibly adjusted for different types and states of materials to be separated. For materials with high impurity content and high separation difficulty, the ideal separation effect can be achieved by extending the processing time in the transition separation chamber and strengthening the stirring separation effect, thus expanding the application scenarios and scope of the grain recovery device.
[0038] Specifically, the first screen 5 is located above the second screen, allowing the material, after preliminary screening in the pre-separation chamber, to fall naturally into the lower transition separation chamber. Gravity assists in material transport, reducing additional power consumption. The third screen 10 slopes downwards from the first screen 5 towards the second screen, conforming to the material flow trend. This allows the material in the transition separation chamber to slide more smoothly into the main separation chamber, preventing material stagnation and accumulation, and ensuring the continuity and efficiency of material flow throughout the device. Furthermore, the layered arrangement of the three screens forms a stepped separation system. The first screen 5 completes the initial separation of large particles, the inclined third screen 10 performs secondary screening during the material's descent, further processing any material not completely separated in the pre-separation, while the second screen performs the final fine separation in the main separation chamber. The three screens work together, progressively improving the separation capacity for impurities and grains of different particle sizes, significantly enhancing the purity of grain recovery and overall separation efficiency.
[0039] Please see Figure 2 A first rotating shaft 11 is located in the middle of the separating auger 6. Multiple first spikes 7 are spaced axially on the first rotating shaft 11, with adjacent first spikes 7 positioned opposite each other on both sides of the first rotating shaft 11. This axially spaced spike design allows for continuous and uniform stirring and separation of materials at different locations during material conveying, improving the efficiency and quality of pre-separation. This ensures that more grains are effectively separated from impurities during the pre-separation stage, reducing the working pressure on the subsequent main separation chamber.
[0040] Please see Figure 4The separating drum 8 includes a guide auger and a second rotating shaft 12 coaxially connected. The guide auger is located on the side of the second rotating shaft 12 away from the waste discharge port 4, effectively guiding and conveying the material entering the main separating chamber from the transition separating chamber. It smoothly pushes the material to the area of the second rotating shaft 12, preventing the material from accumulating or becoming disordered at the entrance of the main separating chamber, allowing the material to enter the separation process in a more orderly state, laying a good foundation for subsequent separation work, and ensuring the continuity and efficiency of material processing. Multiple coaxial rods 13 are arranged circumferentially on the second rotating shaft 12, and multiple second spikes 14 are respectively arranged on the multiple coaxial rods 13 and extend radially outward. This increases the contact area and range of action between the second spikes 14 and the material. When the separating drum 8 rotates, the second spikes 14 can more comprehensively and deeply disperse and separate the material. Whether it is fine impurities or adhered particles, they can be fully separated under the strong action of the spikes. Meanwhile, the coaxial rod 13 makes the installation of the second nail tooth 14 more stable, and can maintain a stable working state during high-speed rotation, further improving the reliability and efficiency of separation, and ensuring that the main separation chamber can achieve high-precision separation of grains and impurities.
[0041] Specifically, the guide auger includes a conical guide cylinder 15, the outer diameter of which increases from the direction away from the second rotating shaft 12 towards the direction closer to the second rotating shaft 12, and a spiral impeller is formed on the outer periphery of the conical guide cylinder 15. The cooperation between the spiral impeller and the conical structure enhances the conveying and agitation capabilities of the material. During rotation, the spiral impeller not only smoothly pushes the material to the second rotating shaft 12, but also performs preliminary agitation and compression on the material. As the outer diameter of the conical guide cylinder 15 changes, the extrusion and agitation forces experienced by the material during conveying also continuously change. This dynamic process helps to further separate adhering grains and impurities, allowing the material to receive more thorough pretreatment before entering the area of the second rotating shaft 12, thereby significantly improving the overall separation efficiency of the main separation chamber and reducing the grain loss rate.
[0042] Specifically, one end of each of the coaxial rods 13 is vertically fixed to the end face of the conical guide cylinder 15 near the second rotating shaft 12. A support plate 16 is fitted onto the second rotating shaft 12, and multiple positioning grooves for supporting the coaxial rods 13 are formed on the circumferential edge of the support plate 16. One end of each coaxial rod 13 is fixedly connected to the conical guide cylinder 15, and the other end is supported by the positioning grooves of the support plate 16, forming a stable support structure that greatly enhances the firmness of the second nail tooth 14 installation. During the high-speed rotation of the separating drum 8, even if the second nail tooth 14 is subjected to strong impact from the material, this structure can effectively disperse the force, preventing the coaxial rods 13 from shaking, deforming, or even breaking, ensuring that the second nail tooth 14 always maintains a stable working state, thereby ensuring the reliability and continuity of the separation process, reducing the risk of equipment failure due to loose parts, and extending the overall service life of the device.
[0043] Preferably, two support discs 16 are respectively located at the middle of the second rotating shaft 12 and at the end of the second rotating shaft 12 near the waste discharge port 4. The double support disc layout further strengthens the support for the coaxial rod 13 and the second nail tooth 14. The support disc 16 located in the middle of the second rotating shaft 12 can effectively share the stress on the middle area when the separating drum 8 rotates, preventing the second rotating shaft 12 from bending and deforming due to uneven force. The support disc 16 at the end near the waste discharge port 4 can enhance the structural rigidity of the discharge area, ensuring that the coaxial rod 13 and the second nail tooth 14 remain stable during the material discharge process. This method of coordinated support at both ends and the middle enables the separating drum 8 to form a more stable mechanical structure when operating at high speed, effectively resisting material impact, reducing the risk of component loosening and damage, and significantly improving the durability and reliability of the equipment. The support plate 16 has multiple process holes 17 circumferentially oriented. On the one hand, the process holes 17 reduce the weight of the support plate 16, thereby reducing the overall rotational inertia of the separating drum 8, making the equipment easier to start and operate, reducing the load on the drive system, and lowering energy consumption. On the other hand, these process holes 17 optimize airflow around the support plate 16 and facilitate material passage. During the rotation of the separating drum 8, air can flow quickly through the process holes 17, carrying away the heat generated by friction, preventing components from overheating and causing performance degradation, helping to maintain a stable operating temperature and extend the service life of the equipment. In addition, when the material is broken up and separated by the second spike tooth 14 in the main separation chamber, some fine particles and impurities can pass through the process holes 17, preventing material accumulation on the surface of the support plate 16, ensuring that the separating drum 8 can continuously and efficiently process newly entering materials, and improving the overall separation efficiency. In addition, the process hole 17 makes the material flow more smoothly inside the separating drum 8, which helps to form a more uniform material distribution state, allowing the second spike tooth 14 to make more full contact with the material, further improving the separation accuracy of grains and impurities and reducing the grain loss rate.
[0044] Specifically, both the first screen 5 and the second screen are concave arc-shaped screens. This arc-shaped structure encourages materials to naturally gather towards the center of the screen, utilizing gravity to assist material flow and resulting in a more concentrated distribution of materials on the screen. This facilitates targeted processing of the materials by the separating auger 6 and the separating drum 8. Simultaneously, the arc-shaped screen design increases the contact area between the screen and the material, enabling multiple screenings during material rolling and sliding, thus improving the separation capability for impurities and grains of different particle sizes. Furthermore, the concave center of the arc-shaped screen causes impurities that fail to pass through the screen holes to move to both sides along the arc of the screen, preventing impurities from accumulating and clogging the screen holes in the center. This ensures the continuous and effective operation of the screen and further enhances the separation efficiency and reliability of the grain recovery device.
[0045] The transmission mechanism 2 includes a drive motor and several transmission chains, which are located on both sides of the frame body 1 and wound around the end gears of the first rotating shaft 11 and the second rotating shaft 12 that exit the frame body 1. The multiple transmission chains distributed on both sides of the frame form a symmetrical transmission structure, which can evenly transmit the power of the drive motor to the first rotating shaft 11 and the second rotating shaft 12, avoiding shaft twisting or transmission failure caused by uneven force on one side. This ensures that the separating auger 6 and the separating drum 8 maintain a stable and synchronized rotation speed, providing reliable power for efficient grain separation. Furthermore, in terms of ease of maintenance, chain drive is simple in structure and easy to disassemble compared to other transmission methods. When a transmission chain experiences wear or breakage, it can be quickly replaced without a complex disassembly process. The layout on both sides of the frame allows maintenance personnel easier access to the transmission chains, significantly shortening maintenance time and reducing maintenance costs.
[0046] After the grains mixed with impurities are separated in the pre-separation chamber, the transition separation chamber and the main separation chamber, the separated grains fall into the grain lifting device below through the first screen 5, the third screen 10 and the second screen respectively. The grain lifting device then transports the grains to the grain warehouse. The separated impurities are discharged directly into the field through the waste discharge pipe 3 from the waste discharge port 4 at its lower end, thus completing the separation of the grains.
[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A drum-type grain recycling device, characterized in that, Includes a frame body (1), the frame body (1) is provided with a pre-separation chamber and a main separation chamber connected in sequence inside the frame body (1), a transmission mechanism (2) is provided on the outside of the frame body (1), and a waste discharge port (4) connected to the main separation chamber is provided on one side of the frame body (1); The pre-separation chamber is provided with a feed inlet at the top and a first screen (5) at the bottom. The pre-separation chamber is provided with a separation auger (6) inside and a plurality of first nail teeth (7) are provided at intervals along the axial direction. The bottom of the main separation chamber is provided with a second screen, and the interior of the main separation chamber is provided with a separation roller (8). The outer periphery of the separation roller (8) is provided with a plurality of second nail teeth (14). The transmission mechanism (2) is used to drive the separating auger (6) and the separating drum (8) to rotate, so as to drive the mixture through the pre-separation chamber and the main separation chamber in sequence.
2. The drum-type grain recycling device as described in claim 1, characterized in that, The pre-separation chamber and the main separation chamber are arranged side by side. The top of the main separation chamber is provided with an upper cover plate (9), which is inclined downward toward the feed inlet.
3. The drum-type grain recycling device as described in claim 2, characterized in that, A transition separation chamber is provided at the same end of the pre-separation chamber and the main separation chamber. The transition separation chamber is located at the end of the main separation chamber away from the waste discharge port (4). The separation auger (6) and the separation drum (8) both extend into the transition separation chamber. A third screen (10) is provided at the lower end of the transition separation chamber.
4. The drum-type grain recycling device as described in claim 3, characterized in that, The first screen (5) is located above the second screen, and the third screen (10) is inclined downward from the first screen (5) toward the second screen.
5. The drum-type grain recycling device as described in claim 1, characterized in that, The separation auger (6) has a first rotating shaft (11) in the middle, and a plurality of first nail teeth (7) are spaced apart along the axial direction on the first rotating shaft (11), with two adjacent first nail teeth (7) arranged opposite each other on both sides of the first rotating shaft (11).
6. The drum-type grain recycling device as described in claim 1, characterized in that, The separating drum (8) includes a guide auger and a second rotating shaft (12) connected coaxially. The guide auger is located on the side of the second rotating shaft (12) away from the waste discharge port (4). The second rotating shaft (12) is circumferentially provided with a plurality of coaxial rods (13). A plurality of second nail teeth (14) are respectively provided on the plurality of coaxial rods (13) and extend radially outward.
7. A drum-type grain recycling device as described in claim 6, characterized in that, The guide auger includes a conical guide cylinder (15), the outer diameter of which increases from away from the second rotating shaft (12) toward the second rotating shaft (12), and a spiral impeller is formed on the outer periphery of the conical guide cylinder (15).
8. The drum-type grain recycling device as described in claim 7, characterized in that, One end of each of the coaxial rods (13) is vertically fixed to the end face of the tapered guide cylinder (15) near the second rotating shaft (12). A support plate (16) is fitted on the second rotating shaft (12), and the circumferential edge of the support plate (16) is provided with multiple positioning grooves for supporting the coaxial rods (13).
9. A drum-type grain recycling device as described in claim 8, characterized in that, The two support disks (16) are respectively located in the middle of the second rotating shaft (12) and at one end of the second rotating shaft (12) near the waste discharge port (4). The support disks (16) are provided with a plurality of process holes (17) in the circumferential direction.
10. A drum-type grain recycling device as described in claim 1, characterized in that, Both the first screen (5) and the second screen are arc-shaped screens with a concave center.