A cereal conveying and sorting device

Abstract

The application discloses a grain conveying and sorting device and relates to the technical field of grain sorting devices.The device comprises a screening mechanism, two vibrating conveying parts symmetrically installed on a bearing frame, and a collecting assembly.The conveying surfaces of the two vibrating conveying parts are inclined along the direction from the head end to the tail end, and the tail ends of the two conveying surfaces are opposite to each other.The collecting assembly comprises a residue box and a collection plate.The residue box is installed on the bearing frame and is used for collecting rice residues passing through the conveying surfaces, and the collection plate is installed on the vibrating conveying parts.Through the blanking and shunting mechanism, the rice is divided into two streams and is conveyed to two uniform-flow discharging mechanisms respectively.After the rice is uniformly and flatly laid by the uniform-flow discharging mechanisms, the rice is conveyed to the head end of the conveying surface of the vibrating conveying part, thereby avoiding the problems of an excessively thick material layer and sieve hole covering caused by the concentrated accumulation of the rice, and the rice can reach the uniform laying state when entering the conveying surface, the laying time is shortened, and the screening efficiency and the screening precision are improved.

Description

Technical Field

[0001] This invention relates to the field of grain sorting equipment technology, and particularly to a grain conveying and sorting device. Background Technology

[0002] In rice processing, grain screening, and seed selection, grain conveying and sorting devices are typically used to continuously convey and screen rice to remove broken grains, bran, dust, and other impurities, thereby improving rice quality and subsequent processing efficiency. Existing grain conveying and sorting devices generally include a vibrating screening mechanism, a conveying mechanism, and a collecting mechanism. Through vibration, the rice continuously moves across the screen surface, and impurities are separated from the rice during the conveying process, thus completing the rice screening operation.

[0003] Currently, most of the rice conveying and sorting devices mentioned above adopt a single feeding method in actual use. That is, the operator pours the rice to be screened directly into the feeding end of the vibrating conveyor. The rice is conveyed forward along the conveying surface under the action of vibration. Smaller impurities pass through the conveying surface and fall into the collection component below, while rice that does not pass through the conveying surface continues to be conveyed to the end of the conveying surface for collection.

[0004] However, the aforementioned existing technologies still have shortcomings in practical use. Because rice tends to accumulate at the beginning of the conveying surface after falling into the vibrating conveyor, the material layer thickness is uneven across different areas of the conveying surface. When the material layer is thick, the upper layer of rice can block the contact between the lower layer of rice and impurities and the conveying surface, making it difficult for broken grains, bran powder, and other fine impurities located inside the material layer to pass through the conveying surface in a timely manner, thus reducing screening efficiency. Simultaneously, the rice relies mainly on vibration for natural spreading after entering the conveying surface. When the feed volume is large, continuous piles easily form at the beginning of the conveying surface. The piled rice needs to travel a long distance with vibration to gradually disperse, which not only prolongs the time it takes for the rice to reach a uniform spreading state but also easily causes some screen holes to be covered during the accumulation process, preventing some screen holes from fully participating in screening, further reducing the screening effect and accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide a grain conveying and sorting device to solve the technical problem in the prior art that rice tends to form concentrated piles when it enters the vibrating conveyor, resulting in uneven material distribution and poor screening effect.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution: A grain conveying and sorting device, comprising: The screening mechanism includes a support frame and two vibrating conveyors symmetrically mounted on the support frame. The conveying surfaces of the two vibrating conveyors are inclined in the direction from the first end to the last end, and the ends of the two conveying surfaces are opposite each other. The collection assembly includes a residue bin and a collection plate. The residue bin is mounted on a support frame and is used to collect rice residue passing through the conveyor surface. The collection plate is mounted on the vibrating conveyor and is used to collect rice that falls from the end of the conveyor surface. Two equal-flow discharge mechanisms are symmetrically installed on the support frame. The feeding and diversion mechanism is installed in the middle of the support frame. After the unscreened rice is poured into the feeding and diversion mechanism, it is transported to two equal flow discharging mechanisms. Among them, the rice that falls into the equal flow feeding mechanism is evenly spread and transported to the first end of the conveying surface of the vibrating conveyor.

[0007] Preferably, the support frame is equipped with two baffles, which are located above the vibrating conveyor. The flow equalization and discharge mechanism includes a transmission rod rotatably installed between the two baffles. The transmission rod is fitted with pulleys, and a conveyor belt is driven between the two pulleys. The conveyor belt is inclined and the end closest to the middle of the support frame is the top end. The bottom end of the conveyor belt is located at the beginning of the corresponding conveying surface. Multiple annular limiting grooves are formed on the outer periphery of the conveyor belt along its width direction.

[0008] Preferably, a flow equalization plate is horizontally slidably mounted on both baffles. The flow equalization plate is located between the two baffles and on the upper surface of the conveyor belt. The baffles are close to the top of the conveyor belt. A gap is left between the bottom of the baffle and the conveyor belt. A transmission component for driving the flow equalization plate to move is mounted on the baffle.

[0009] Preferably, a mounting frame is installed between the two baffles, the mounting frame is located below the two conveyor belts, the transmission assembly includes a sliding plate slidably mounted on the mounting frame, the two free ends of the sliding plate are respectively hinged to a connecting rod, the two connecting rods are respectively hinged to two flow equalization plates, and a drive assembly for driving the sliding plate to move is mounted on the mounting frame.

[0010] Preferably, the drive assembly includes two reciprocating lead screws that are horizontally and rotatably mounted on the mounting frame, with one end of the two reciprocating lead screws connected to each other, and two sliding plates respectively mounted on the two reciprocating lead screws. A transmission motor for driving the reciprocating lead screws to rotate is mounted on the mounting frame.

[0011] Preferably, the flow equalization plate includes two guide rods slidably inserted into the baffle, a push plate is constructed between the two guide rods at one end above the conveyor belt, and a connecting plate is installed between the other ends of the two guide rods, the connecting plate being hinged to the connecting rod.

[0012] Preferably, each of the two baffles is equipped with a plug-in tube on the side away from each other, and a mounting rod is detachably mounted on the plug-in tube. A plate is installed between the two mounting rods, and a guide film is installed at the bottom of the plate.

[0013] Preferably, the material feeding and diversion mechanism includes a hopper installed between two baffles, and an mounting plate installed between the top ends of two conveyor belts for sealing the gap between the top ends of the two conveyor belts. The top of the mounting plate is constructed with a triangular block, which is located below the hopper outlet.

[0014] Preferably, the vibrating conveyor includes a vibrating hood that is elastically and inclinedly mounted on the support frame. The top of the vibrating hood is open and a screening plate is installed thereon. The two vibrating hoods are open on the side near the end of the screening plate and are connected to each other. The collecting plate is installed between the two vibrating hoods and is inclinedly distributed. The bottom end of the collecting plate is located on the outside, and the bottom ends of the two screening plates are located above the collecting plate.

[0015] Preferably, a collecting hood is connected between the bottoms of the two vibration hoods, and the bottom surface of the collecting hood is symmetrically constructed as two guide slopes. A slag discharge port is opened between the bottom ends of the guide slopes, and the residue box is located below the slag discharge port.

[0016] The beneficial effects of this invention are: 1. This invention uses a feeding and diversion mechanism to divide rice into two streams and transport them to two equal-flow feeding mechanisms. The equal-flow feeding mechanisms spread the rice evenly and then transport it to the beginning of the conveying surface of the vibrating conveyor. This avoids the problem of excessively thick material layer and screen hole coverage caused by concentrated accumulation of rice. It ensures that the rice is evenly spread when it enters the conveying surface, shortens the spreading time, and improves screening efficiency and screening accuracy. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0018] Figure 2 This is the present invention. Figure 1 Partial three-dimensional sectional view.

[0019] Figure 3 This is the present invention. Figure 1 Another partial sectional view.

[0020] Figure 4 This is a partial structural illustration of the present invention.

[0021] Figure 5 This is a structural illustration of another part of the present invention.

[0022] Figure 6 This is a diagram illustrating the structure of the guiding film of this invention.

[0023] Figure 7 This is the present invention. Figure 2 Enlarged view of the structure at point A in the middle.

[0024] Figure 8 This is the present invention. Figure 2 Enlarged view of the structure at point B in the middle.

[0025] Explanation of reference numerals in the attached figures: 1. Screening mechanism; 101. Support frame; 102. Vibrating conveyor; 1021. Vibrating cover; 1022. Screening plate; 2. Collection assembly; 201. Residue box; 202. Collection plate; 3. Discharge and diversion mechanism; 301. Hopper; 302. Mounting plate; 303. Triangular block; 4. Flow equalization and discharge mechanism; 401. Baffle; 402. Transmission rod; 403. Pulley; 404. Conveyor belt; 405. 1. Annular limiting groove; 5. Flow equalization plate; 501. Guide rod; 502. Push plate; 503. Connecting plate; 6. Transmission assembly; 601. Mounting bracket; 602. Sliding plate; 603. Linking rod; 7. Drive assembly; 701. Reciprocating screw; 702. Drive motor; 8. Insert sleeve; 9. Mounting rod; 10. Plate body; 11. Guide film; 12. Collection hood; 13. Guide slope; 14. Slag discharge port. Detailed Implementation

[0026] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0027] Example 1 Currently, the aforementioned grain conveying and sorting devices still have shortcomings in practical use. Because rice tends to accumulate at the beginning of the conveying surface after falling into the vibrating conveyor, the material layer thickness is uneven across different areas of the conveying surface. When the material layer is thick, the upper layer of rice can block the contact between the lower layer of rice and impurities and the conveying surface, making it difficult for broken grains, bran, and other fine impurities located inside the material layer to pass through the conveying surface in a timely manner, thus reducing screening efficiency. Simultaneously, the rice relies mainly on vibration for natural spreading after entering the conveying surface. When the feed volume is large, continuous piles easily form at the beginning of the conveying surface. These piled-up rice require a long vibrating conveying distance to gradually disperse, which not only prolongs the time it takes for the rice to reach a uniform spreading state but also easily causes some screen holes to be covered during the accumulation process, preventing some screen holes from fully participating in screening, further reducing the screening effect and accuracy.

[0028] like Figures 1 to 8 As shown, a grain conveying and sorting device includes: The screening mechanism 1 includes a support frame 101 and two vibrating conveyors 102 symmetrically mounted on the support frame 101. The conveying surfaces of the two vibrating conveyors 102 are inclined from the beginning to the end, and the ends of the two conveying surfaces are opposite each other. Preferably, the vibrating conveyors 102 are existing vibrating screens. It should be noted that existing vibrating screens generally include a screen box, a screen mesh, and a vibrating motor. The screen mesh is installed inside the screen box, and the vibrating motor is installed on the screen box. The vibrating motor drives the screen box and screen mesh to vibrate, realizing the continuous conveying and screening of materials on the screen mesh. The difference between this application and existing vibrating screens is that the conveying surfaces of the vibrating conveyors 102 are inclined at a certain angle, so that the conveying surfaces gradually decrease from the beginning to the end, so that the rice gradually gathers towards the end under the action of vibration.

[0029] The collection component 2 includes a residue box 201 and a collection plate 202. The residue box 201 is mounted on the support frame 101 and is used to collect rice residue that passes through the conveying surface. The collection plate 202 is mounted on the vibrating conveyor 102 and is used to collect rice that falls from the end of the conveying surface.

[0030] Two equal flow discharge mechanisms 4 are symmetrically installed on the support frame 101.

[0031] The feeding and diversion mechanism 3 is installed in the middle of the support frame 101. Unscreened rice is poured into the feeding and diversion mechanism 3 and then transported to two equal flow dispensing mechanisms 4. The rice that falls onto the equal flow dispensing mechanism 4 is evenly spread and transported to the first end of the conveying surface of the vibrating conveyor 102.

[0032] The working principle of this rice conveying and sorting device is as follows: Unscreened rice is poured into the feeding and diversion mechanism 3, which divides the rice into two streams, which then fall into two equalizing discharge mechanisms 4. The two equalizing discharge mechanisms 4 evenly spread the rice and convey it to the beginning of the conveying surface of two vibrating conveyors 102. Under the vibration of the vibrating conveyors 102, the rice moves forward along the inclined conveying surface. During the movement, smaller particles, bran powder, dust, and other impurities pass through the conveying surface and fall into the residue box 201 for collection. Rice that does not pass through the conveying surface continues to move towards the end of the conveying surface and finally falls into the collection plate 202 from the end of the conveying surface to complete the collection, thus achieving the sorting and screening of rice.

[0033] It should be emphasized that the core improvement of this embodiment is that the rice is divided into two streams by the feeding and diversion mechanism 3 and transported to two equal flow feeding mechanisms 4 respectively. The equal flow feeding mechanism 4 evenly spreads the rice and then transports it to the first end of the conveying surface of the vibrating conveyor 102. This avoids the problem of excessively thick material layer and screen hole coverage caused by concentrated accumulation of rice. The rice is evenly spread when it enters the conveying surface, which shortens the spreading time and improves the screening efficiency and screening accuracy.

[0034] In this embodiment, combined with Figure 1 and Figure 8 As shown, two baffles 401 are installed on the support frame 101, and the baffles 401 are located above the vibrating conveyor 102. The material distribution mechanism 4 includes a transmission rod 402 rotatably installed between the two baffles 401. The transmission rod 402 is fitted with a pulley 403, and a conveyor belt 404 is driven between the two pulleys 403. The conveyor belt 404 is inclined, and the end closest to the middle of the support frame 101 is the top. That is, the tops of the two conveyor belts 404 are close to each other. Preferably, a motor is installed on the baffle 401 to drive one of the transmission rods 402 to rotate. The bottom end of the conveyor belt 404 is located at the beginning of the corresponding conveying surface. Multiple annular limiting grooves 405 are opened along the width direction on the outer periphery of the conveyor belt 404. The annular limiting grooves 405 are used to limit the rice, so that the rice is spread flat within the annular limiting grooves 405.

[0035] In other words, after the rice falls from the feeding and diversion mechanism 3 into the top of the conveyor belt 404, the motor drives the transmission rod 402 to rotate, and the transmission rod 402 drives the conveyor belt 404 to circulate through the pulley 403. The rice moves downward on the inclined conveyor belt 404, and during the movement, the rice gradually falls into the annular limiting grooves 405 on the surface of the conveyor belt 404. The annular limiting grooves 405 divide the rice into multiple independent material flows, so that the rice is evenly distributed along the width direction of the conveyor belt 404. The conveyor belt 404 transports the evenly distributed rice to its bottom end, and the rice falls from the bottom end of the conveyor belt 404 into the first end of the conveying surface of the corresponding vibrating conveyor 102, completing the uniform flow and spreading of materials.

[0036] In this embodiment, combined with Figure 1 and Figure 7 As shown, the feeding and diversion mechanism 3 includes a hopper 301 installed between two baffles 401. It should be noted that the hopper 301 is prior art, typically consisting of a hopper body and a built-in valve plate installed at the bottom of the hopper body. After rice is poured into the hopper body, opening the built-in valve plate allows the rice to fall; this will not be elaborated further here. An mounting plate 302 is installed between the two baffles 401 and located between the top ends of the two conveyor belts 404. This plate is used to seal the gap between the top ends of the two conveyor belts 404, preventing rice from falling through the gap. A triangular block 303 is constructed on the top of the mounting plate 302, located below the discharge port of the hopper 301. When the rice in the hopper 301 falls, it first falls to the tip of the triangular block 303. Guided by the inclined surfaces on both sides of the triangular block 303, the rice is evenly distributed to the top ends of the two conveyor belts 404, completing the diversion and conveying of the rice.

[0037] Example 2 In the above embodiment, during the process of conveying rice to the first end of the conveying surface of the vibrating conveyor 102 by the conveyor belt 404, although the rice is divided into multiple streams by the annular limiting groove 405, some rice may pile up on top of the annular limiting groove 405 after falling into it and not enter the groove. As the conveyor belt 404 moves, these piled rice will still fall unevenly to the first end of the conveying surface, affecting the uniformity of the spreading. Therefore, how to further flatten the rice on the conveyor belt 404 and ensure that the rice enters the annular limiting groove 405 is a problem that needs to be solved.

[0038] In this embodiment, combined with Figure 1 and Figure 8 As shown, flow equalization plates 5 are horizontally slidably mounted on both baffles 401. The flow equalization plates 5 are located between the two baffles 401 and on the upper surface of the conveyor belt 404, near the top of the conveyor belt 404. A gap is left between the bottom of the flow equalization plates 5 and the conveyor belt 404. It should be noted that the purpose of this gap is to prevent the conveyor belt 404 from rubbing against the flow equalization plates 5 during movement. The gap is very small, and rice will not pass through it. A transmission assembly 6 is installed on the baffles 401 to drive the flow equalization plates 5 to move. The flow equalization plates 5 move horizontally back and forth above the conveyor belt 404, flattening the rice piled on the surface of the conveyor belt 404, so that the rice is evenly pushed into each annular limiting groove 405, further improving the uniformity of the spreading and enabling the rice to be quickly conveyed into the annular limiting grooves 405.

[0039] In this embodiment, combined with Figures 4 to 8 As shown, a mounting frame 601 is installed between the two baffles 401. The mounting frame 601 is located below the two conveyor belts 404. The transmission assembly 6 includes a sliding plate 602 that is slidably mounted on the mounting frame 601. The two free ends of the sliding plate 602 are respectively hinged to a connecting rod 603. The two connecting rods 603 are respectively hinged to two flow equalization plates 5. A drive assembly 7 that drives the sliding plate 602 to move is installed on the mounting frame 601.

[0040] In this embodiment, combined with Figures 6 to 8As shown, the drive assembly 7 includes two reciprocating lead screws 701 horizontally and rotatably mounted on the mounting bracket 601. One end of the two reciprocating lead screws 701 is connected to each other, and two sliding plates 602 are respectively mounted on the two reciprocating lead screws 701. It should be noted that the sliding plate 602 has a slider that cooperates with the reciprocating lead screw 701. The slider is embedded in the helical groove of the reciprocating lead screw 701. When the reciprocating lead screw 701 rotates, the cooperation between the helical groove and the slider drives the sliding plate 602 to reciprocate along the axial direction of the reciprocating lead screw 701. A transmission motor 702 for driving the reciprocating lead screws 701 to rotate is mounted on the mounting bracket 601. After the drive motor 702 starts, it drives the two reciprocating screws 701 to rotate synchronously. The two reciprocating screws 701 drive the two sliding plates 602 to move horizontally back and forth along the mounting frame 601. The sliding plates 602 drive the two flow equalization plates 5 to slide horizontally back and forth along the baffle 401 through the two connecting rods 603. The two flow equalization plates 5 scrape back and forth above the two conveyor belts 404 to evenly spread the rice on the surface of the conveyor belts 404.

[0041] In this embodiment, combined with Figure 1 and Figure 8 As shown, the flow equalization plate 5 includes two guide rods 501 slidably inserted into the baffle 401. A push plate 502 is constructed between the two guide rods 501 at their ends above the conveyor belt 404. It should be noted that the gap between the flow equalization plate 5 and the conveyor belt 404 mentioned above refers to the gap between the bottom of the push plate 502 and the conveyor belt 404 in this embodiment. A connecting plate 503 is installed between the other ends of the two guide rods 501, and the connecting plate 503 is hinged to the connecting rod 603. When the drive motor 702 drives the sliding plate 602 to move back and forth, the sliding plate 602 drives the connecting plate 503 to move through the connecting rod 603. The connecting plate 503 drives the push plate 502 to move horizontally back and forth above the conveyor belt 404 through the guide rods 501. The push plate 502 scrapes the rice stacked on the surface of the conveyor belt 404 and pushes it into the annular limiting groove 405.

[0042] It should be emphasized that the core improvement of this embodiment is that by setting a horizontally reciprocating flow equalization plate 5 above the conveyor belt 404, the pusher plate 502 scrapes the rice stacked on the surface of the conveyor belt 404 and pushes it evenly into each annular limiting groove 405, so that the rice reaches a more uniform spreading state before entering the vibrating conveyor 102, which further improves the screening efficiency of rice on the conveying surface.

[0043] In this embodiment, combined with Figure 3 and Figure 6As shown, each of the two baffles 401 has a connector 8 mounted on its opposite side, and a mounting rod 9 is detachably mounted on the connector 8. Preferably, the mounting rod 9 has a threaded hole on one side, and the connector 8 has a through hole. The mounting rod 9 is fixed to the connector 8 by passing a bolt through the through hole and screwing it into the threaded hole. The bolted connection facilitates the installation and removal of the mounting rod 9. When the guide film 11 needs to be replaced or cleaned, the bolt can be unscrewed to remove the mounting rod 9 and the guide film 11 as a whole, which is convenient. A plate 10 is installed between the two mounting rods 9, and a guide film 11 is installed at the bottom of the plate 10. The guide film 11 can be made of soft polyvinyl chloride, which is soft and elastic. As shown in the figure, the guide film 11 is located on and adheres to the conveyor belt 404. When the rice comes into contact with the conveyor belt 404 after passing the push plate 502, the guide film 11 can further guide the rice that has not yet entered the annular limiting groove 405 into the annular limiting groove 405. Compared with rigid boards, the flexible polyvinyl chloride guide film 11 can produce elastic deformation when the rice comes into contact with it, preventing the rice from being crushed due to collision with hard objects and ensuring the integrity of the rice.

[0044] Example 3 In Embodiment 1, the vibrating conveyor 102 adopts an existing vibrating screen structure, with each vibrating conveyor 102 independently equipped with a collecting plate 202. When the two vibrating conveyors 102 are arranged symmetrically, two collecting plates 202 are required to collect the rice, and the collected rice needs to be collected again, increasing the complexity of subsequent processes. Therefore, how to automatically collect the rice screened by the two vibrating conveyors 102 towards the center, simplifying the collection structure, is a problem that needs to be solved.

[0045] In this embodiment, combined with Figures 1 to 3 As shown, the vibrating conveyor 102 includes a vibrating hood 1021 elastically and inclinedly mounted on a support frame 101. The inclination direction of the vibrating hood 1021 is consistent with the inclination direction of the conveying surface in Embodiment 1, that is, the end of the vibrating hood 1021 near the middle of the support frame 101 is lower than the end away from the middle of the support frame 101. The top of the vibrating hood 1021 is open and a screening plate 1022 is installed thereon. Both the screening plate 1022 and the bottom surface of the vibrating hood 1021 are inclined. The sides of the two vibrating hoods 1021 near the ends of the screening plate 1022 are open and connected to each other. A collecting plate 202 is installed between the two vibrating hoods 1021 and is inclined. The bottom end of the collecting plate 202 is located on the outside, and the bottom ends of the two screening plates 1022 are located above the collecting plate 202. In other words, an opening is formed between the two vibrating hoods 1021 for the collecting plate 202 to pass through.

[0046] It should be noted that the vibrating cover 1021 can use the outer shell of an existing vibrating screen, and the screening plate 1022 corresponds to the screen mesh in the prior art. A vibration motor is installed on the vibrating cover 1021, and the vibration motor is also a prior art technology. There is only one vibration motor, installed at the connection point of the two vibrating covers 1021 or on one of the vibrating covers 1021. One vibration motor can drive the vibration of both vibrating covers 1021 simultaneously, simplifying the structure. It should also be noted that the inclination of the vibrating cover 1021 is small, only slightly inclined, to cooperate with the vibration and allow the rice to gradually gather towards the center. The rice has sufficient residence time on the screening plate 1022 for screening and will not slide away directly due to excessive inclination angle.

[0047] The working principle of the vibrating conveyor 102 is as follows: After the vibrating motor starts, it drives the two vibrating covers 1021 to vibrate as a whole, and the two screening plates 1022 vibrate synchronously with the vibrating covers 1021. After the rice enters the screening plate 1022 from the first end of the conveying surface, it gradually moves towards the end of the inclined screening plate 1022 under the action of vibration. During the movement, impurities such as broken grains and bran powder pass through the screening plate 1022 and fall into the vibrating cover 1021. The rice that does not pass through the screening plate 1022 continues to move to the end of the screening plate 1022 and falls onto the collecting plate 202 from the end of the two screening plates 1022. The collecting plate 202 is inclined, and the rice continues to slide on the collecting plate 202 along the inclined direction, and finally is discharged from the bottom of the collecting plate 202 to the external collection device, realizing the automatic collection of rice after screening by the two screening plates 1022. Only one collecting plate 202 is needed to complete the collection.

[0048] It should be emphasized that the core improvement of this embodiment is that the two vibration hoods 1021 are connected to each other and driven by a vibration motor. The ends of the two screening plates 1022 extend to the same collecting plate 202, so that the rice screened by the two screening plates 1022 automatically gathers to the middle and is discharged onto a collecting plate 202. There is no need to set up two collecting plates 202 and collect again, which simplifies the collection structure and reduces subsequent processes.

[0049] In this embodiment, combined with Figure 1 and Figure 2As shown, a collecting hood 12 connects the bottoms of the two vibrating hoods 1021. The bottom surface of the collecting hood 12 is symmetrically constructed with two guiding inclined surfaces 13. A slag discharge port 14 is opened between the bottom ends of the guiding inclined surfaces 13, and the residue box 201 is located below the slag discharge port 14. Because the bottom surface of the vibrating hood 1021 is inclined, the particles, bran powder, and other residues that fall into the vibrating hood 1021 through the screening plate 1022 slide down the bottom surface of the vibrating hood 1021 under the action of vibration and enter the collecting hood 12. The residues continue to slide towards the center along the guiding inclined surfaces 13 in the collecting hood 12, and finally converge at the slag discharge port 14 for discharge and fall into the residue box 201 for unified collection. This achieves centralized treatment of the residues and eliminates the need for a separate residue collection container for each vibrating hood 1021.

[0050] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A grain conveying and sorting device, characterized in that, include: The screening mechanism (1) includes a support frame (101) and two vibrating conveyors (102) symmetrically mounted on the support frame (101). The conveying surfaces of the two vibrating conveyors (102) are inclined in the direction from the first end to the last end, and the ends of the two conveying surfaces are opposite each other. The collection assembly (2) includes a residue bin (201) and a collection plate (202). The residue bin (201) is mounted on the support frame (101) and is used to collect rice residue passing through the conveying surface. The collection plate (202) is mounted on the vibrating conveyor (102) and is used to collect rice that falls from the end of the conveying surface. Two equal-flow discharge mechanisms (4) are symmetrically installed on the support frame (101); The feeding and diversion mechanism (3) is installed in the middle of the support frame (101). After the unscreened rice is poured into the feeding and diversion mechanism (3), it is transported to the two equal flow feeding mechanisms (4) through the feeding and diversion mechanism (3). Among them, the rice that falls into the equal flow feeding mechanism (4) is evenly spread and transported to the first end of the conveying surface of the vibrating conveyor (102).

2. A grain conveying and sorting device according to claim 1, characterized in that, Two baffles (401) are installed on the support frame (101). The baffles (401) are located above the vibrating conveyor (102). The flow equalization and discharge mechanism (4) includes a transmission rod (402) rotatably installed between the two baffles (401). The transmission rod (402) is fitted with a pulley (403). A conveyor belt (404) is installed between the two pulleys (403). The conveyor belt (404) is inclined and the end closest to the middle of the support frame (101) is the top. The bottom end of the conveyor belt (404) is located at the beginning of the corresponding conveying surface. Multiple annular limiting grooves (405) are opened on the outer periphery of the conveyor belt (404) along its width direction.

3. A grain conveying and sorting device according to claim 2, characterized in that, A flow equalization plate (5) is horizontally slidably installed on both of the baffles (401). The flow equalization plate (5) is located between the two baffles (401) and on the upper surface of the conveyor belt (404). The baffles (401) are close to the top of the conveyor belt (404). There is a gap between the bottom of the baffles (401) and the conveyor belt (404). A transmission assembly (6) for driving the flow equalization plate (5) to move is installed on the baffles (401).

4. A grain conveying and sorting device according to claim 3, characterized in that, A mounting frame (601) is installed between the two baffles (401). The mounting frame (601) is located below the two conveyor belts (404). The transmission assembly (6) includes a sliding plate (602) slidably mounted on the mounting frame (601). The two free ends of the sliding plate (602) are respectively hinged to connecting rods (603). The two connecting rods (603) are respectively hinged to two flow equalization plates (5). A drive assembly (7) for driving the sliding plate (602) to move is installed on the mounting frame (601).

5. A grain conveying and sorting device according to claim 4, characterized in that, The drive assembly (7) includes two reciprocating screws (701) that are horizontally and rotatably mounted on the mounting bracket (601). One end of the two reciprocating screws (701) is connected to each other. Two sliding plates (602) are respectively mounted on the two reciprocating screws (701). A transmission motor (702) for driving the reciprocating screws (701) to rotate is mounted on the mounting bracket (601).

6. A grain conveying and sorting device according to claim 5, characterized in that, The flow equalization plate (5) includes two guide rods (501) that are slidably inserted into the baffle (401). A push plate (502) is constructed between the two guide rods (501) at one end above the conveyor belt (404). A connecting plate (503) is installed between the other ends of the two guide rods (501). The connecting plate (503) is hinged to the connecting rod (603).

7. A grain conveying and sorting device according to claim 2, characterized in that, A plug tube (8) is installed on each of the two baffles (401) on the side away from each other. An installation rod (9) is detachably installed on the plug tube (8). A plate (10) is installed between the two installation rods (9). A guide film (11) is installed at the bottom of the plate (10).

8. A grain conveying and sorting device according to claim 2, characterized in that, The feeding and diversion mechanism (3) includes a hopper (301) installed between two baffles (401), and an mounting plate (302) installed between the top ends of two conveyor belts (404) between the two baffles (401) for sealing the gap between the top ends of the two conveyor belts (404). The top of the mounting plate (302) is constructed with a triangular block (303), which is located below the discharge port of the hopper (301).

9. A grain conveying and sorting device according to claim 1, characterized in that, The vibrating conveyor (102) includes a vibrating hood (1021) that is elastically and inclinedly mounted on the support frame (101). The top of the vibrating hood (1021) is open and a screening plate (1022) is installed thereon. The two vibrating hoods (1021) are open on the side near the end of the screening plate (1022) and are connected to each other. The collecting plate (202) is installed between the two vibrating hoods (1021) and is inclined. The bottom of the collecting plate (202) is located on the outside, and the bottom of the two screening plates (1022) is located above the collecting plate (202).

10. A grain conveying and sorting device according to claim 1, characterized in that, A collection hood (12) is connected between the bottoms of the two vibration hoods (1021). The bottom surface of the collection hood (12) is symmetrically constructed as two guide slopes (13). A slag discharge port (14) is opened between the bottom ends of the guide slopes (13). The residue box (201) is located below the slag discharge port (14).

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