Rice and wheat seed dust and impurity removing equipment

Abstract

This invention discloses a dust and impurity removal device for rice and wheat seeds, relating to the field of agricultural machinery technology. It includes a machine body with a sieve plate. A hopper is located on one side of the sieve plate, and a discharge channel is provided inside the hopper. The outlet of the discharge channel is located corresponding to the sieve plate. A cover is installed on the inner wall of the discharge channel, with an open bottom. A pressure roller is rotatably connected inside the discharge channel. The pressure roller is located inside the cover, with its outer peripheral wall conforming to the inner peripheral wall of the cover. A portion of the pressure roller protrudes from the outside of the cover and is close to the inner bottom wall of the discharge channel. The outer peripheral wall of the pressure roller is elastically configured. In this invention, rice and wheat seeds enter the discharge channel through the hopper and are squeezed by the pressure roller before reaching the sieve plate. The outer wall of the pressure roller is deformable, forming pits and gaps after squeezing the seeds, trapping them and carrying them into the cover. Inside the cover, the seeds rub against a rubber layer, further loosening the rice husks, and then slide off the pressure roller and are discharged through the channel outlet.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a dust and impurity removal device for rice and wheat seeds. Background Technology

[0002] During the harvesting, storage, and processing of rice and wheat seeds, impurities such as dust, straw, broken leaves, shriveled grains, and mud are usually mixed in. This not only affects the purity and quality of the seeds but also reduces their germination rate and storage safety. Therefore, it is necessary to remove dust and impurities from the seeds.

[0003] Currently, among the various technical means for removing dust and impurities from rice and wheat seeds, the most commonly used method is to use a screening machine. The screening machine has a continuously vibrating screen plate, which screens the rice and wheat seeds by vibrating and shaking the screen plate, separating impurities and dust from the rice and wheat seeds. However, many rice and wheat seeds are covered with rice husks, and the connection between the rice husks and the seeds is relatively tight. It is difficult to effectively remove the rice husks by simply vibrating and shaking the sieve plate, resulting in a large number of seeds remaining with the rice husks. This leads to poor impurity removal and low seed cleanliness. Summary of the Invention

[0004] The purpose of this invention is to provide a dust and impurity removal device for rice and wheat seeds to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides a dust removal and impurity removal device for rice and wheat seeds, including a machine body with a sieve plate on the machine body. A hopper is correspondingly arranged on one side of the sieve plate. A discharge channel is opened in the hopper. The outlet of the discharge channel is arranged corresponding to the sieve plate. A cover is installed on the inner wall of the discharge channel. The bottom of the cover is open. A pressure roller is rotatably connected in the discharge channel. The pressure roller is located inside the cover. The outer peripheral wall of the pressure roller is set to fit against the inner peripheral wall of the cover. A part of the pressure roller protrudes from the outside of the cover and is close to the inner bottom wall of the discharge channel. The outer peripheral wall of the pressure roller is elastically set and can produce moderate deformation when subjected to force.

[0006] Furthermore, a rubber layer is installed on the outer peripheral wall of the pressure roller. The rubber layer is elastic and is used to alternately squeeze rice and wheat seeds and adapt to elastic deformation as the pressure roller rotates. The inner peripheral wall of the rubber layer is set to fit the outer peripheral wall of the pressure roller.

[0007] Furthermore, the outer peripheral wall of the rubber layer has multiple openings, which are arranged at equal intervals along the outer peripheral wall of the rubber layer in the circumferential direction, and the openings are gradually narrowed at one end located deep in the rubber layer.

[0008] Furthermore, the rotation direction of the pressure roller is towards the outlet direction of the discharge channel, and a rubbing plate is installed on the inner peripheral wall of the cover. The circumference of the rubbing plate is smaller than the circumference of the cover, and the rubbing plate is located on the side away from the outlet direction of the discharge channel. The inner peripheral wall of the rubbing plate is close to the rubber layer to form a grinding surface.

[0009] Furthermore, a support roller is rotatably connected to the inner wall of the discharge channel. The support roller is located inside the pressure roller, and the pressure roller can slide along the outer wall of the support roller. The support roller is hollow inside, and a suction port is opened through a part of the support roller, forming a suction area. The remaining part is a closed area, which corresponds to the washboard. Multiple connecting holes are opened through the pressure roller. One end of the connecting hole is connected to the opening, and the other end is connected to the inside of the support roller through the suction area.

[0010] Furthermore, a spring plate is also provided in the discharge channel. The spring plate is set close to the inner bottom wall of the discharge channel. The spring plate and the inner bottom wall of the discharge channel are connected by a spring. One end of the pressure roller is provided with multiple top blocks. The top blocks are connected to the outer peripheral wall of the pressure roller. The multiple top blocks are arranged at intervals along the circumference of the pressure roller. When the pressure roller rotates, the multiple top blocks alternately strike the spring plate. The top of the spring plate is set close to the rubber layer.

[0011] Furthermore, the inner bottom wall of the discharge channel is inclined, with the downward inclination direction located at the outlet, and the spring plate has the same inclination angle as the inner bottom wall of the discharge channel.

[0012] Furthermore, a partition is installed on the inner wall of the discharge channel to separate the discharge channel and form a side channel. The partition has a through opening to connect the discharge channel and the side channel. A guide plate is installed at the end of the cover away from the outlet of the discharge channel. One end of the guide plate gradually slopes downward and extends through the through opening into the side channel. One side of the guide plate is set in close contact with the rubber layer.

[0013] Furthermore, a drive mechanism is installed on the machine body, which is connected to one end of the pressure roller and is used to drive the pressure roller to rotate along the outer peripheral wall of the support roller. A suction unit is also installed on the machine body, which is internally connected to the support roller.

[0014] Furthermore, the support roller is also provided with a shaft, both ends of which are connected to the inner wall of the discharge channel. Multiple support plates are installed on the outer wall of the shaft, and one end of each support plate is connected to the inner ring wall of the support roller.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, rice and wheat seeds enter the discharge channel through the hopper and are squeezed by the pressure roller in front of the screen plate. The outer wall of the pressure roller can be deformed, and after squeezing the rice and wheat seeds, it forms pits and gaps, which clamp the rice and wheat seeds and bring them into the cover. The seeds rub against the rubber layer inside the cover, further loosening the rice husks, and then slide off the pressure roller and are discharged through the channel outlet.

[0016] 2. In this invention, when rice and wheat seeds are transferred into the cover along with the rubber layer, one side of the area does not contact the cover to prevent premature falling. After passing the highest point of the pressure roller, the seeds enter the rubbing plate area and come into contact with the grinding surface. The seeds roll and rub between the grinding surface and the rubber layer and gradually fall down as the pressure roller rotates. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the appearance of the present invention; Figure 2 This is a schematic diagram of the structure of the hopper and discharge channel in this invention; Figure 3 This is a schematic diagram of the connection structure between the discharge channel and the partition in this invention; Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle; Figure 5 This is a schematic diagram of the connection structure between the discharge channel and the spring plate in this invention; Figure 6 This is a schematic diagram of the connection structure between the pressure roller and the top block in this invention; Figure 7 This is a schematic diagram of the connection structure between the cover and the grinding surface in this invention; Figure 8 This is a schematic diagram of the connection structure between the pressure roller and the rubber layer in this invention; Figure 9 for Figure 8 Enlarged view of the structure at point B; Figure 10 This is a schematic diagram of the connection structure between the pressure roller and the connecting hole in this invention.

[0018] In the image: 1. Body; 2. Hopper; 3. Discharge channel; 4. Baffle; 41. Opening; 5. Side passage; 6. Spring plate; 7. Cover; 71. Washboard; 72. Grinding surface; 8. Guide plate; 9. Pressure roller; 91. Connecting hole; 10. Rubber layer; 101. Opening; 11. Support roller; 12. Top block; 13. Suction zone; 14. Enclosed zone; 15. Shaft; 16. Support plate. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides a technical solution: See Figures 1-10 As shown, a dust removal and impurity removal device for rice and wheat seeds includes a body 1 with a sieve plate on the body 1. A hopper 2 is provided on one side of the sieve plate. A discharge channel 3 is provided in the hopper 2. The outlet of the discharge channel 3 is provided corresponding to the sieve plate. A cover 7 is fixedly installed on the inner wall of the discharge channel 3. The bottom of the cover 7 is open. A pressure roller 9 is rotatably connected inside the discharge channel 3. The pressure roller 9 is located inside the cover 7. The outer peripheral wall of the pressure roller 9 is set to fit against the inner peripheral wall of the cover 7. A part of the pressure roller 9 protrudes from the outside of the cover 7 and is close to the inner bottom wall of the discharge channel 3. The outer peripheral wall of the pressure roller 9 is elastic and can produce moderate deformation when subjected to force.

[0021] Rice and wheat seeds are poured into the hopper 2 and then enter the discharge channel 3. They flow through the outlet of the discharge channel 3 onto the screen plate. The pressure roller 9 is installed at the outlet of the discharge channel 3. When the rice and wheat seeds pass through the pressure roller 9, the rotating pressure roller 9 will squeeze the rice and wheat seeds to loosen the outer shell of some of the rice and wheat seeds and help the outer shell of the rice and wheat seeds fall off. Some of them still pass through the outlet and go out. Others will stick to the outer wall of the pressure roller 9 because they are squeezed by the pressure roller 9. The outer peripheral wall of the pressure roller 9 has a deformation function. After being squeezed with the rice and wheat seeds, it will be concave, forming pits or gaps, increasing the friction on the rice and wheat seeds, and can grasp the rice and wheat seeds. Then most of the rice and wheat seeds will rotate with the pressure roller 9 into the cover 7. The cover 7 is placed around the pressure roller 9, and the curvature of the cover 7 matches the curvature of the pressure roller 9. After the rice and wheat seeds enter the coverage area of ​​the cover 7, as the pressure roller 9 continues to rotate, the rice and wheat seeds rub against the inner wall of the rubber layer 10, which helps to separate or loosen the connection between the rice and wheat seeds and the rice husk. Then the rice and wheat seeds slide off the pressure roller 9 and are discharged from the outlet of the discharge channel 3.

[0022] See Figures 5-10 A rubber layer 10 is fixedly installed on the outer peripheral wall of the pressure roller 9. The rubber layer 10 is elastic and is used to alternately squeeze rice and wheat seeds and adapt to elastic deformation as the pressure roller 9 rotates. The inner peripheral wall of the rubber layer 10 is set to fit the outer peripheral wall of the pressure roller 9.

[0023] The pressure roller 9 itself is rigid, providing rigid support, while the rubber layer 10 provides elasticity. As the pressure roller 9 rotates to squeeze the rice and wheat seeds, the rubber layer 10 undergoes elastic deformation after making rigid contact with the rice and wheat seeds, which is used to hold the rice and wheat seeds in place. The rubber layer 10 is close to the pressure roller 9 and is fixedly connected to the pressure roller 9. In this way, when the rice and wheat seeds are squeezed, the pressure roller 9 can provide rigid support to ensure that the rice and wheat seeds can withstand the force.

[0024] See Figures 8-9 The outer peripheral wall of the rubber layer 10 has multiple openings 101, which are arranged at equal intervals along the outer peripheral wall of the rubber layer 10 in the circumferential direction. The openings 101 are gradually narrowed at one end located deep within the rubber layer 10.

[0025] The function of the opening 101 is twofold. When the rice and wheat seeds are squeezed, the opening 101 can open and clamp the rice and wheat seeds, reducing the chance of the rice and wheat seeds falling off the rubber layer 10 before being rubbed, thus improving the gripping effect on the rice and wheat seeds. It also enhances the deformation ability of the rubber layer 10 and increases the friction.

[0026] See Figures 7-8 The rotation direction of the pressure roller 9 is towards the outlet direction of the discharge channel 3. A rubbing plate 71 is fixedly installed on the inner peripheral wall of the cover 7. The circumference of the rubbing plate 71 is smaller than the circumference of the cover 7, and the rubbing plate 71 is located on the side away from the outlet direction of the discharge channel 3. The inner peripheral wall of the rubbing plate 71 is close to the rubber layer 10 to form a grinding surface 72.

[0027] Please see Figure 8 From this perspective, the outlet of the discharge channel 3 is on the left. Therefore, the pressure roller 9 rotates clockwise from this perspective. Because the right side of the cover 7 is equipped with the rubbing plate 71, the rubbing plate 71 is closer to the outer peripheral wall of the rubber layer 10. When the rice and wheat seeds are transferred into the cover 7 along with the rubber layer 10, they do not contact the cover 7 when they are on the left side, thus preventing the rice and wheat seeds from falling. When it passes the highest point above the pressure roller 9, it begins to enter the range of the washboard 71, and the rice and wheat seeds open into the inner ring wall of the washboard 71, that is... Figure 7 The grinding surface 72 contacts the rice and wheat seeds in the field of view, and then the grinding surface 72 rubs against the rice and wheat seeds. At this time, the rice and wheat seeds roll between the grinding surface 72 and the rubber layer 10 and are rubbed. At the same time, the rice and wheat seeds also fall down with the rotation of the pressure roller 9.

[0028] See Figure 8 and Figure 10The inner wall of the discharge channel 3 is also rotatably connected to a support roller 11. The support roller 11 is located inside the pressure roller 9. The pressure roller 9 can slide along the outer wall of the support roller 11. The support roller 11 is hollow inside. A part of the support roller 11 has a suction port through it, which forms a suction area 13. The rest is a closed area 14, which corresponds to the rubbing board 71. Multiple connecting holes 91 are through it on the pressure roller 9. One end of the connecting hole 91 is connected to the opening 101, and the other end is connected to the support roller 11 through the suction area 13.

[0029] The support roller 11 has a suction force, which is transmitted to the pressure roller 9 through the suction zone 13, and then to the opening 101 through the connecting hole 91, thereby adhering to the rice and wheat seeds and preventing them from easily falling off. Figure 8 When these rice and wheat seeds reach the closed area 14 as the pressure roller 9 rotates, the closed area 14 blocks the suction force, the rice and wheat seeds are released, and then the rice and wheat seeds rub against the grinding surface 72 and can be tilted out from the opening 101.

[0030] See Figures 2-6 The discharge channel 3 is also equipped with a spring plate 6. The spring plate 6 is set close to the inner bottom wall of the discharge channel 3. The spring plate 6 and the inner bottom wall of the discharge channel 3 are connected by a spring. One end of the pressure roller 9 is equipped with multiple top blocks 12. The top blocks 12 are fixedly connected to the outer peripheral wall of the pressure roller 9. The multiple top blocks 12 are arranged at intervals along the circumference of the pressure roller 9. When the pressure roller 9 rotates, the multiple top blocks 12 alternately strike the spring plate 6. The top of the spring plate 6 is set close to the rubber layer 10.

[0031] As the pressure roller 9 rotates, the multiple top blocks 12 alternately strike the spring plate 6. When the spring plate 6 is struck, it moves toward the bottom wall of the discharge channel 3. During the movement, it squeezes the spring. Then, after the top block 12 rotates away from the spring plate 6, the spring plate 6 will rebound and be squeezed again by the spring plate 6, thus realizing the shaking effect of the spring plate 6, which helps to disperse rice and wheat seeds. As rice and wheat seeds move within the discharge channel 3, they tend to accumulate excessively on one side, resulting in a thicker layer in that area. This causes uneven adhesion of the rice and wheat seeds to the rubber layer 10. The shaking of the spring plate 6 helps to distribute the rice and wheat seeds, which in turn facilitates the compression of the rice and wheat seeds by the rubber layer 10.

[0032] See Figure 5 The inner bottom wall of the discharge channel 3 is inclined, with the downward inclination direction located at the outlet. The spring plate 6 has the same inclination angle as the inner bottom wall of the discharge channel 3.

[0033] The tilt angle allows rice and wheat seeds to slide automatically to the outlet of the discharge channel 3 by gravity, achieving smooth feeding without the need for additional power, effectively preventing rice and wheat seeds from being stuck, accumulating, or blocked in the discharge channel 3.

[0034] See Figures 3-9A partition 4 is fixedly installed on the inner wall of the discharge channel 3. The partition 4 separates the discharge channel 3 to form a side channel 5. The partition 4 has a through opening 41 for connecting the discharge channel 3 and the side channel 5. A guide plate 8 is fixedly installed at the end of the cover 7 away from the outlet of the discharge channel 3. One end of the guide plate 8 gradually slopes downward and extends through the through opening 41 into the side channel 5. One side of the guide plate 8 is set in close contact with the rubber layer 10.

[0035] First look Figure 8 The guide plate 8 is located at the tail end of the right side of the cover 7. When the rice and wheat seeds that have been rubbed fall down, they land on the guide plate 8. The rice and wheat seeds that have been rubbed will either have loose rice husks or the rice husks will fall off directly and mix with the rice and wheat seeds. Therefore, they fall directly onto the guide plate 8 and slide directly into the side channel 5 along the tilt angle of the guide plate 8, and then slide out onto the sieve plate along the side channel 5.

[0036] See Figures 1-10 The machine body 1 is equipped with a drive mechanism, which is connected to one end of the pressure roller 9 and is used to drive the pressure roller 9 to rotate along the outer peripheral wall of the support roller 11. The machine body 1 is also equipped with a suction unit, which is internally connected to the support roller 11.

[0037] The drive mechanism uses an electric motor to drive the pressure roller 9 to rotate. The suction unit can use a suction pump to create a negative pressure inside the support roller 11, thereby achieving suction force. The inner dimensions of the connecting hole 91 and the opening 101 are smaller than the rice and wheat seeds, so that the rice and wheat seeds will not be sucked in.

[0038] See Figure 8 The support roller 11 is also provided with a shaft 15. Both ends of the shaft 15 are fixedly connected to the inner wall of the discharge channel 3. Multiple support plates 16 are fixedly installed on the outer wall of the shaft 15. One end of the support plate 16 is fixedly connected to the inner ring wall of the support roller 11.

[0039] The shaft 15 is fixed inside the discharge channel 3, and multiple support plates 16 provide support for the support roller 11, so that the support roller 11 is stably supported inside the pressure roller 9, and at the same time provides support for the pressure roller 9.

Claims

1. A dust and impurity removal device for rice and wheat seeds, comprising a body (1), a sieve plate on the body (1), and a hopper (2) correspondingly disposed on one side of the sieve plate, characterized in that, The hopper (2) is provided with a discharge channel (3). The outlet of the discharge channel (3) is set to correspond to the screen plate. A cover (7) is installed on the inner wall of the discharge channel (3). The bottom of the cover (7) is open. A pressure roller (9) is rotatably connected inside the discharge channel (3). The pressure roller (9) is located inside the cover (7). The outer peripheral wall of the pressure roller (9) is set to fit against the inner peripheral wall of the cover (7). Part of the pressure roller (9) protrudes from the outside of the cover (7) and is close to the inner bottom wall of the discharge channel (3). The outer peripheral wall of the pressure roller (9) is elastic and can produce moderate deformation when subjected to force.

2. The rice and wheat seed dust removal and impurity removal equipment as described in claim 1, characterized in that: The outer peripheral wall of the pressure roller (9) is fitted with a rubber layer (10). The rubber layer (10) is elastic and is used to alternately squeeze rice and wheat seeds and adapt to elastic deformation as the pressure roller (9) rotates. The inner peripheral wall of the rubber layer (10) is fitted to the outer peripheral wall of the pressure roller (9).

3. The rice and wheat seed dust removal and impurity removal equipment as described in claim 2, characterized in that: The outer peripheral wall of the rubber layer (10) has multiple openings (101). The multiple openings (101) are arranged at equal intervals along the outer peripheral wall of the rubber layer (10) in the circumferential direction. The openings (101) are located at the end deep in the rubber layer (10) and gradually narrow.

4. The rice and wheat seed dust removal and impurity removal equipment as described in claim 3, characterized in that: The rotation direction of the pressure roller (9) is towards the outlet direction of the discharge channel (3). A rubbing plate (71) is installed on the inner peripheral wall of the cover (7). The circumference of the rubbing plate (71) is smaller than the circumference of the cover (7), and the rubbing plate (71) is located on the side away from the outlet direction of the discharge channel (3). The inner peripheral wall of the rubbing plate (71) is close to the rubber layer (10) to form a grinding surface (72).

5. The rice and wheat seed dust removal and impurity removal equipment as described in claim 4, characterized in that: The inner wall of the discharge channel (3) is also rotatably connected to a support roller (11). The support roller (11) is located inside the pressure roller (9). The pressure roller (9) can slide along the outer wall of the support roller (11). The support roller (11) is hollow inside. A suction port is opened through a part of the support roller (11). This part forms a suction area (13). The rest is a closed area (14). The closed area (14) corresponds to the rubbing board (71). Multiple connecting holes (91) are opened through the pressure roller (9). One end of the connecting hole (91) is connected to the opening (101), and the other end is connected to the support roller (11) through the suction area (13).

6. The rice and wheat seed dust removal and impurity removal equipment as described in claim 5, characterized in that: The discharge channel (3) is also provided with a spring plate (6). The spring plate (6) is set close to the inner bottom wall of the discharge channel (3). The spring plate (6) and the inner bottom wall of the discharge channel (3) are connected by a spring. One end of the pressure roller (9) is provided with multiple top blocks (12). The top blocks (12) are connected to the outer peripheral wall of the pressure roller (9). The multiple top blocks (12) are arranged at intervals along the circumference of the pressure roller (9) so that when the pressure roller (9) rotates, the multiple top blocks (12) alternately hit the spring plate (6). The top of the spring plate (6) is set close to the rubber layer (10).

7. The rice and wheat seed dust removal and impurity removal equipment as described in claim 6, characterized in that: The inner bottom wall of the discharge channel (3) is inclined, with the downward inclination direction located at the outlet. The spring plate (6) has the same inclination angle as the inner bottom wall of the discharge channel (3).

8. The rice and wheat seed dust removal and impurity removal equipment as described in claim 7, characterized in that: The inner wall of the discharge channel (3) is equipped with a partition (4), which separates the discharge channel (3) to form a side channel (5). The partition (4) has a through opening (41) for connecting the discharge channel (3) and the side channel (5). A guide plate (8) is installed at one end of the cover (7) away from the outlet of the discharge channel (3). One end of the guide plate (8) gradually tilts downward and extends through the through opening (41) into the side channel (5). One side of the guide plate (8) is set close to the rubber layer (10).

9. The rice and wheat seed dust removal and impurity removal equipment as described in claim 1, characterized in that: The machine body (1) is equipped with a drive mechanism, which is connected to one end of the pressure roller (9) and is used to drive the pressure roller (9) to rotate along the outer peripheral wall of the support roller (11). The machine body (1) is also equipped with a suction unit, which is internally connected to the support roller (11).

10. The rice and wheat seed dust removal and impurity removal equipment as described in claim 9, characterized in that: The support roller (11) is also provided with a shaft (15), both ends of which are connected to the inner wall of the discharge channel (3). Multiple support plates (16) are installed on the outer wall of the shaft (15), and one end of the support plate (16) is connected to the inner ring wall of the support roller (11).

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