Reverse automatic screening and collecting mechanism for corn kernels

Abstract

The utility model discloses a kind of corn kernel reverse automatic screening collection mechanism, including the screening box being set on rack, screening box inside is provided with screen, the screen includes the fixed screen on the side of discharge port and the movable screen on the side of material box;The air bellow is set on screening box close to material box, the lower portion of the air bellow is provided with multiple first suction nozzles inserted into screening box and the second suction nozzle located above the discharge port of material box.The utility model relates to grain processing equipment technical field, by setting air bellow above screening box, using the mode of negative pressure suction, light impurities are separated in the material blanking, shaking screen process.By the action of negative pressure, the light impurities falling with corn kernel originally are sucked up, its outflow direction is opposite with the screening direction of corn kernel, to effectively avoid that light impurities are accumulated on screen, cover screen hole or wrap corn kernel, guarantee the permeability of screen, improve overall screening efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of grain processing equipment technology, specifically to a reverse automatic screening and collection mechanism for corn kernels. Background Technology

[0002] In the corn processing stage, a screening machine is used to screen the corn kernels to remove impurities. The impurities of corn mainly include three categories: first, large pieces of corn cob impurities that appear due to the breakage of the corn cob during threshing; second, corn kernels, dust and other fragmented impurities; and third, light impurities such as corn silk and leaves.

[0003] Currently, most common corn screening equipment uses vibrating screens for separation. The basic principle is that corn kernels and mixed impurities move together on the vibrating screen. Corn fragments and dust (fine impurities) smaller than the screen aperture leak out from below the screen, while corn kernels larger than the screen aperture, large pieces of impurities, and light impurities move forward on the screen together. Finally, they are separated at the discharge end of the equipment by gravity or wind.

[0004] However, this traditional screening method has significant drawbacks. Because corn kernels, large impurities, and light impurities are all concentrated and separated at the end of the screen (i.e., the discharge end), light impurities (such as corn silk and leaves) easily become trapped around corn kernels as they move across the screen. These light impurities, covering the screen surface or filling the gaps between the corn kernels, not only hinder effective contact between the kernels and the screen, affecting screening efficiency, but also cause some qualified corn kernels to be carried away by the impurities and discharged as impurities, resulting in unnecessary losses. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a reverse automatic screening and collection mechanism for corn kernels, which solves the problem of existing screening machines efficiently separating light impurities from corn kernels during the screening process and avoiding interference caused by these impurities.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a reverse automatic screening and collection mechanism for corn kernels, including a screening box mounted on a frame, a material box located at the inlet end of the screening box, and a discharge port located at the outlet end. The screening box is equipped with a screen, and the side wall of the screening box is equipped with a first impurity outlet. An inclined beam plate is inclinedly mounted on the screen near the discharge port to guide the impurities on the screen to the first impurity outlet. A bellows is provided on the screening box near the material box, and a plurality of first suction nozzles inserted into the screening box and a second suction nozzle located above the material box outlet are provided below the bellows. The screen includes a fixed screen located on one side of the discharge port and a movable screen located on one side of the material box. One end of the movable screen is hinged to the end of the fixed screen, and the other end is connected to the screening box through an elastic element. Several lifting elements are provided on the movable screen. The number of lifting elements corresponds to the number of first suction nozzles and is located below the first suction nozzles.

[0007] Preferably, the movable screen includes a plurality of first screen pieces and at least one second screen piece, the first screen pieces and the second screen pieces being connected in sequence by a connecting beam, and the lifting device being disposed on the connecting beam.

[0008] Preferably, the second screen sheet is disposed close to one side of the material box, and the second screen sheet includes a flat portion and a raised portion.

[0009] Preferably, the lifting component includes a strip plate, the top surface of which is sloped and gradually rises along the material flow direction.

[0010] Preferably, the inclined beam plate is located above the fixed screen.

[0011] Preferably, a baffle plate is provided on the back surface below the first suction nozzle in the material flow direction. The baffle plate includes a connecting part connected to the first suction nozzle and a plurality of fins located below the connecting part, and a gap groove is formed between two adjacent fins.

[0012] Preferably, the spacing between the gaps is 2cm-3cm.

[0013] Preferably, the bottom of the screening box has a second impurity outlet located below the fixed screen; a collection hopper is provided below the frame to collect impurities flowing out of the first and second impurity outlets.

[0014] Preferably, the top of the bellows is connected to a suction pipe.

[0015] The beneficial effects of this utility model are as follows: By using the reverse automatic corn kernel screening and collection mechanism provided by this utility model, compared with the prior art, a bellows is installed above the screening box, and negative pressure suction is used to remove light impurities during the material falling and shaking process. Through the negative pressure, the light impurities that originally fell with the corn kernels are sucked upwards, and their outflow direction is opposite to the screening direction of the corn kernels. This effectively avoids the accumulation of light impurities on the screen, covering the screen holes, or entangling corn kernels, ensuring the permeability of the screen and improving the overall screening efficiency and accuracy.

[0016] The movable screen, when the equipment vibrates, generates independent up-and-down shaking. Combined with the lifting components, this continuously lifts the material, creating a "shaking screen" effect. This makes it easier for the first suction nozzle to draw in corn kernels and light impurities after they are lifted, allowing lighter corn silks and leaves to be more easily captured by the airflow, while heavier corn kernels fall back onto the screen, achieving precise and efficient removal of light impurities. Attached Figure Description

[0017] Figure 1 This is an isometric drawing of the present invention; Figure 2 This is the front view of the present utility model; Figure 3 This is a front view of the screening box of this utility model; Figure 4 This is an isometric view of the second screen sheet of this utility model; Figure 5 This is a schematic diagram of the wedge block structure of this utility model; Figure 6 This is the front view of the toothed plate of this utility model.

[0018] Explanation of the reference numerals in the figure: 1. Frame, 2. Screening box, 3. Discharge port, 4. First impurity outlet, 5. Collection hopper, 6. Material box, 7. Air box, 8. Suction pipe, 9. First suction nozzle, 10. Second suction nozzle, 11. Inclined beam plate, 12. Baffle plate, 13. Second impurity outlet, 14. Fixed screen, 15. Movable screen, 16. Connecting beam, 17. First screen plate, 18. Second screen plate, 181. Flat part, 182. Protrusion, 19. Elastic element, 20. Strip plate, 21. Slope, 22. Fin, 23. Gap groove. Detailed Implementation

[0019] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Various changes can be made to the implementation scheme as long as the effects of the present invention can be achieved.

[0021] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0022] like Figures 1 to 6As shown in the figure, this application proposes a reverse automatic screening and collection mechanism for corn kernels, including a frame, a screening box 2 mounted on the frame 1, a material box 6 located at the inlet end of the screening box 2, and a discharge port 3 located at the outlet end. A screen is installed inside the screening box 2, and a vibrating motor is installed on the outside.

[0023] Furthermore, in this embodiment, the screen includes a fixed screen 14 located on one side of the discharge port 3 and a movable screen 15 located on one side of the material box 6, with the inclined beam plate 11 located above the fixed screen 14.

[0024] In addition, a first impurity outlet 4 is provided on the side wall of the screening box 2, and an inclined beam plate 11 is inclined near the discharge port 3 of the screen, with a gap between the inclined beam plate 11 and the screen for corn kernels to pass through. When large impurities (such as broken corn cobs) move together with corn kernels on the screen towards the discharge port 3, the inclined beam plate 11 blocks the large impurities and guides the impurities on the fixed screen 14 to the first impurity outlet 4 during the vibration of the screening box 2, thus forming a vibration screening to remove impurities.

[0025] Furthermore, one end of the movable screen 15 is hinged to the end of the fixed screen 14, and the other end is connected to the screening box 2 via an elastic element 19, which is a spring; and several lifting elements are provided on the movable screen 15. When the screening box 2 vibrates and screens, the movable screen 15 inside is affected by the vibration of the screening box 2, and a continuous up-and-down vibration effect is formed through the elastic element 19, so that the material on its surface is lifted by the lifting elements during the downward screening process, forming a shaking screen.

[0026] In this embodiment, as Figure 1-3 As shown, an air box 7 is installed above the screening box 2, close to the material box 6. The top of the air box 7 is connected to a suction pipe 8, which is connected to a suction fan. When the suction fan works, it generates negative pressure, which acts through the suction pipe 8 into the air box 7 to create a negative pressure suction force, used to suck up light impurities in the screening box 2.

[0027] Furthermore, in this embodiment, a plurality of first suction nozzles 9 inserted into the screening box 2 and a second suction nozzle 10 located above the discharge port of the material box 6 are provided below the bellows 7. The first suction nozzles 9 are used to suck up light impurities generated when the movable screen 15 shakes and screens corn kernels in motion; the second suction nozzles 10 are used to suck up light impurities that are blown away during the process of the material falling from the material box 6 into the screening box 2.

[0028] By setting multiple impurity removal points, the material undergoes multiple impurity removal processes during feeding, shaking, and vibrating screening, thus completing the screening work. Furthermore, the suction of the bellows 7 causes light impurities that would normally fall and be discharged along with the corn kernels to be lifted upwards and separated from the corn kernels, changing the screening outflow direction of the light impurities and preventing them from carrying over the corn kernels and affecting the screening of the corn kernels.

[0029] In addition, in order to improve the shaking effect, in this embodiment, the number of lifting components corresponds to the number of first suction nozzles 9, and the lifting components are located below the first suction nozzles 9, so that the material can be directed toward the first suction nozzles 9 during the lifting process of the movable screen 15, so that the first suction nozzles 9 can suck away light impurities, while heavier corn kernels and large pieces of impurities fall back onto the movable screen 15.

[0030] Reference Figure 3 As shown, in this embodiment, the movable screen 15 includes a plurality of first screen pieces 17 and at least one second screen piece 18. The outermost first screen piece 17 is hinged to the fixed screen 14. The first screen pieces 17 and the second screen pieces 18 are connected sequentially by a connecting beam 16, on which the aforementioned lifting device is mounted.

[0031] Furthermore, the second screen 18 is positioned close to one side of the material box 6, and the second screen 18 is connected to the screening box 2 via an elastic element 19. For example... Figure 4 As shown, the second screen 18 in this embodiment includes a flat portion 181 and a raised portion 182. The raised portion 182 is located below the outlet of the material box 6, and the falling material is evenly distributed on the flat portion 181 through the raised portion 182.

[0032] In this embodiment, the lifting component is as follows: Figure 5 As shown, it includes a strip plate 20, the top surface of which forms a slope 21 that gradually rises along the material flow direction. When the strip plate 20 is fixed to the connecting beam 16, it is embedded in the gap between two adjacent first screen sheets 17 or between the first screen sheet 17 and the second screen sheet 18.

[0033] In this embodiment, a baffle plate 12 is provided on the back surface below the first suction nozzle 9 in the material flow direction to block the thrown material. The baffle plate 12 includes a connecting part connected to the first suction nozzle 9 and several fins 22 located below the connecting part, with a gap groove 23 formed between adjacent fins 22. The spacing of the gap grooves 23 is 2cm-3cm. When the material is thrown up, light impurities (such as leaves or corn silk) are blocked by the baffle plate 12 and smoothly sucked by the first suction nozzle 9, while corn kernels fall back onto the movable screen 15 through the gap grooves 23.

[0034] Furthermore, in this implementation, such as Figure 3 As shown, a second impurity outlet 13 is provided at the bottom of the screening box 2 below the fixed screen 14, and the fragmented impurities screened by the screen are screened out through the second impurity outlet 13; a collection hopper 5 is provided below the frame 1 to collect the impurities flowing out of the first impurity outlet 4 and the second impurity outlet 13.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reverse automatic screening and collecting mechanism for corn kernels, comprising a screening box mounted on a frame, a feed hopper located at the feed end of the screening box, and a discharge port located at the discharge end, wherein a screen is provided inside the screening box, characterized in that: The side wall of the screening box is provided with a first impurity outlet, and the screen is inclined with a beam plate near the discharge port to guide the impurities on the screen to the first impurity outlet. A bellows is provided on the screening box near the material box, and a plurality of first suction nozzles inserted into the screening box and a second suction nozzle located above the material box outlet are provided below the bellows. The screen includes a fixed screen located on one side of the discharge port and a movable screen located on one side of the material box. One end of the movable screen is hinged to the end of the fixed screen, and the other end is connected to the screening box through an elastic element. Several lifting elements are provided on the movable screen. The number of lifting elements corresponds to the number of first suction nozzles and is located below the first suction nozzles.

2. The corn kernel reverse automatic screening and collection mechanism according to claim 1, characterized in that: The movable screen includes a plurality of first screen pieces and at least one second screen piece, the first screen pieces and the second screen pieces being connected in sequence by a connecting beam, and the lifting device being mounted on the connecting beam.

3. The automatic reverse screening and collecting mechanism for corn kernels according to claim 2, characterized in that: The second screen sheet is disposed close to one side of the material box, and the second screen sheet includes a flat part and a raised part.

4. The corn kernel reverse automatic screening and collection mechanism according to claim 2, characterized in that: The lifting device includes a strip plate, the top surface of which is sloped and gradually rises along the material flow direction.

5. The automatic reverse screening and collecting mechanism for corn kernels according to claim 1, characterized in that: The inclined beam plate is located above the fixed screen.

6. The automatic reverse screening and collecting mechanism for corn kernels according to claim 1, characterized in that: A baffle plate is provided on the back surface below the first suction nozzle in the material flow direction. The baffle plate includes a connecting part connected to the first suction nozzle and a plurality of fins located below the connecting part. A gap groove is formed between two adjacent fins.

7. The automatic reverse screening and collection mechanism for corn kernels according to claim 6, characterized in that: The spacing between the gaps is 2cm-3cm.

8. The automatic reverse screening and collection mechanism for corn kernels according to claim 1, characterized in that: The bottom of the screening box is located below the fixed screen and has a second impurity outlet; a collection hopper is provided below the frame to collect impurities flowing out of the first and second impurity outlets.

9. The automatic reverse screening and collecting mechanism for corn kernels according to claim 1, characterized in that: The top of the bellows is connected to a suction pipe.

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