Impurity separating device for grain suction machine
By using a multi-layered screen structure and intelligent control, the grain impurity separation equipment solves the problems of easy clogging of the grain screening structure and poor separation effect, achieving efficient separation of grain and impurities and improving the screening and separation quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SUQIAN BETTER GRAIN EQUIP CO LTD
- Filing Date
- 2024-07-17
- Publication Date
- 2026-07-07
Smart Images
Figure CN118491864B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to an impurity separation device for a grain suction machine, and more particularly to an impurity separation device for a grain suction machine applied in the field of grain separation. Background Technology
[0002] A grain suction machine is a flexible auger that uses pneumatic conveying to transport granular materials. It is suitable for bulk conveying of various small granular materials such as grain and plastic. When using a grain suction machine to suck up grain, it is necessary to screen the grain for impurities. However, the existing grain impurity screening structure is relatively simple in use. It usually uses multiple layers of screens to achieve the screening purpose, but the screens are prone to clogging, which is not conducive to continuous screening operations.
[0003] To solve the problem of screen clogging, a certain grain screening structure on the market adopts a shaking screening and screen cleaning design, which has a certain market share.
[0004] Chinese invention patent CN113023368B discloses a suction-type grain suction machine with screening function, including a main body. Three collection pipes are arranged on the front wall of the main body. The rear wall of the last collection pipe is fixedly connected to the front wall of the main body. The three collection pipes are movably connected together by a connecting device. A discharge pipe for discharging material is fixedly installed on the lower wall of the main body. In this invention, the drive motor rotates, causing two linkage blocks two to rotate counterclockwise, continuously and alternately squeezing the inclined surface on linkage block one. Linkage block one drives filter screen two to move downwards inside the screening box, squeezing two springs downwards. When both discharge pipes are squeezing linkage block one, the springs return to their original deformation, causing filter screen two to move upwards again inside the screening box. This process repeats, achieving the effect of shaking filter screen two, thereby screening the grain and removing stones and wood chips, greatly improving the practicality of the equipment.
[0005] When screening grain for impurities, the aforementioned grain suction machine avoids screen clogging by shaking. However, during the screening process, impurities that are similar in size, shape, and weight to normal grain particles will inevitably exist, differing only in the smoothness or unevenness of their surfaces. A single screening operation cannot separate the impurities from the grain, resulting in poor screening and separation effects. Summary of the Invention
[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to perform targeted and more refined screening and separation operations while ensuring that the screen is unobstructed, so as to improve the screening and separation quality.
[0007] To solve the above problems, the present invention provides an impurity separation device for a grain suction machine, including a screening and separation box. The inner wall of the screening and separation box is equipped with a coarse screen plate and a fine screen plate arranged vertically. The outer surfaces of the coarse screen plate and the fine screen plate are in close contact with the inner wall of the screening and separation box. The coarse screen plate and the fine screen plate are connected by a support rod. An isolation plate located below the fine screen plate is fixedly installed on the inner wall of the screening and separation box. A transfer pipe plate is installed through the inner wall of the screening and separation box, and an electronic valve is installed inside the transfer pipe plate.
[0008] Below the partition plate is a two-screen unit. The two-screen unit includes a receiving base plate that is inclinedly installed on the inner wall of the screening and separation box. A pleated plate made of breathable material is installed on the top of the receiving base plate. A movable baffle and a waste collection box are symmetrically installed on the top of the pleated plate. The waste collection box is located away from the transfer pipe plate. A symmetrically arranged servo motor is installed on the bottom of the receiving base plate near the receiving base plate. The output end of the servo motor passes through the inside of the pleated plate and is connected to the movable baffle. A discharge pipe extending to the outside of the screening and separation box is installed through the bottom of the waste collection box.
[0009] A fan is installed at the bottom of the base plate, and the isolation plate is made of non-breathable material.
[0010] In the aforementioned impurity separation equipment for grain suction machines, after coarse and fine screening by coarse and fine screen plates, a two-screen unit is used for selective screening and separation, effectively improving the separation quality.
[0011] As a further improvement of this application, the end of the movable baffle is in close contact with the surface of the telescopic baffle, and the waste collection box is slidably installed with symmetrically arranged telescopic baffles on the side surface near the movable baffle. The surfaces of the two telescopic baffles that are close to each other are equipped with protruding strips, and the surface of the protruding strips and the tail end surface of the movable baffle are movably connected by a support rod through a universal joint.
[0012] As a further improvement of this application, the connection between the transfer plate and the inner wall of the screening and separation box is located in the middle of the coarse screen plate and the fine screen plate, and in the middle of the isolation plate and the receiving bottom plate, respectively, and the mesh number of the coarse screen plate is smaller than that of the fine screen plate.
[0013] As a further improvement of this application, a cleaning rod is installed through the inner wall of the screening and separation box, and convex plates are symmetrically arranged on the surface of the cleaning rod. The top of the convex plates is in contact with the bottom surface of the coarse screen plate. A symmetrically arranged servo motor is installed on one side of the outer wall of the screening and separation box, and the output ends of the two servo motors are respectively connected to one end of the two cleaning rods.
[0014] As a further improvement of this application, the horizontal distance between the cleaning rod and the inner wall of the screening and separation box is greater than the length of the convex strip, and the connection position between the support rod and the coarse screen plate is located in the middle of the two cleaning rods.
[0015] As a further improvement of this application, there is a vertical gap between the receiving base plate and the bottom wall of the screening and separation box, and an L-shaped discharge trough plate is slidably installed through the front of the screening and separation box near the bottom, with the top of the discharge trough plate fitting against the bottom edge of the receiving base plate.
[0016] As another improvement of this application, a shaft is installed through the side of the telescopic baffle away from the convex strip, and the two ends of the shaft are rotatably connected to the inner wall of the waste collection box. A reset spring strip with its tail end connected to the inner wall of the waste collection box is connected to the back side of the telescopic baffle away from the convex strip.
[0017] As a further improvement to this application, the telescopic baffle is initially tilted inward, and a threshold strip is installed on the inner bottom wall of the waste collection box, with the threshold strip located between the telescopic baffle and the movable baffle.
[0018] As a further improvement to this application, the end of the return spring bar is connected to the surface of the waste collection box and the telescopic baffle via a movable shaft, and the top of the discharge trough plate is provided with a notch that fits into the fan.
[0019] In summary, in this invention, the grain mixture enters the screening and separation box and undergoes screening and separation treatment through coarse and fine screen plates. Then, it enters the surface of the pleated plate in small amounts multiple times through the transfer pipe plate. The pleats on the surface of the pleated plate prevent impurities with wrinkled patterns from continuing to move downwards, while the relatively smooth grain particles can roll down along the surface of the pleated plate. At this time, the movable baffle is in an inclined state, which drives the two telescopic baffles to fit tightly together and seal the surface of the waste collection box. There is a gap between the movable baffle and the surface of the waste collection box, which facilitates the rolling grain particles to fall below the receiving base plate. Subsequently, the servo motor drives the movable baffle to reset, which indirectly drives the telescopic baffles to open in opposite directions. The fan is started, allowing impurities to roll down along the pleated plate into the interior of the waste collection box, achieving a more comprehensive screening and separation treatment and improving the screening and separation quality. Attached Figure Description
[0020] Figure 1 These are schematic diagrams of the overall structure and appearance of Embodiments 1 and 2 of this application;
[0021] Figure 2 This is a schematic diagram of the internal structure of the screening and separation box in Embodiments 1 and 2 of this application;
[0022] Figure 3 This is a schematic diagram of the installation of the internal cleaning rod and support rod of the screening and separation box in Embodiments 1 and 2 of this application;
[0023] Figure 4 This is a schematic diagram showing the movable baffles of Embodiments 1 and 2 of this application approaching each other;
[0024] Figure 5 This is a schematic diagram showing the movable baffles of Embodiments 1 and 2 of this application in a state where they are facing away from each other;
[0025] Figure 6 This is a schematic diagram of the installation of the base plate and the fan in Embodiments 1 and 2 of this application;
[0026] Figure 7 This is a schematic diagram showing the state in which the pleated plate in Embodiments 1 and 2 of this application prevents impurities from sliding down;
[0027] Figure 8 This is a schematic diagram illustrating the state of grain particles sliding off the surface of the pleated plate in Embodiments 1 and 2 of this application.
[0028] Figure 9 These are state diagrams showing the fan startup process for removing impurities from the surface of the pleated plate in Embodiments 1 and 2 of this application.
[0029] Figure 10 This is a schematic diagram of the installation of the reset spring bar according to Embodiment 2 of this application;
[0030] Figure 11 This is a schematic diagram of the working state of the reset spring bar in Embodiment 2 of this application;
[0031] Figure 12 This is a schematic diagram of the state in which the reset spring bar follows the telescopic baffle to close, as shown in Embodiment 2 of this application.
[0032] Explanation of the labels in the diagram:
[0033] 1. Screening and separation box; 11. Coarse screen plate; 12. Fine screen plate; 13. Transfer pipe plate; 2. Servo motor; 21. Cleaning rod; 22. Raised strip plate; 3. Isolation plate; 4. Second screening unit; 41. Movable baffle; 42. Supporting base plate; 43. Waste collection box; 431. Discharge pipe; 44. Support rod; 45. Telescopic baffle; 46. Pleated plate; 5. Support rod; 6. Servo motor; 7. Fan; 8. Return spring strip. Detailed Implementation
[0034] The two embodiments of this application will now be described in detail with reference to the accompanying drawings.
[0035] Example 1
[0036] Figures 1-9This invention discloses an impurity separation device for a grain suction machine, comprising a screening and separation box 1. The inner wall of the screening and separation box 1 is equipped with a coarse screen plate 11 and a fine screen plate 12 arranged vertically, and the outer surfaces of the coarse screen plate 11 and the fine screen plate 12 are in close contact with the inner wall of the screening and separation box 1. The coarse screen plate 11 and the fine screen plate 12 are connected by a support rod 5. An isolation plate 3 located below the fine screen plate 12 is fixedly installed on the inner wall of the screening and separation box 1. A transfer pipe plate 13 is installed through the inner wall of the screening and separation box 1, and an electronic valve is installed inside the transfer pipe plate 13.
[0037] Below the isolation plate 3, a two-screen unit 4 is installed. The two-screen unit 4 includes a receiving base plate 42 that is inclinedly installed on the inner wall of the screening and separation box 1. A pleated plate 46 made of breathable material is installed on the top of the receiving base plate 42. A movable baffle 41 and a waste collection box 43 are symmetrically installed on the top of the pleated plate 46. The waste collection box 43 is located away from the transfer pipe plate 13. A symmetrically arranged servo motor 6 is installed on the bottom of the receiving base plate 42 near the side of the receiving base plate 42. The output end of the servo motor 6 passes through the inside of the pleated plate 46 and is connected to the movable baffle 41. A discharge pipe 431 with its tail end extending to the outside of the screening and separation box 1 is installed through the bottom of the waste collection box 43.
[0038] A fan 7 is installed at the bottom of the base plate 42, and the isolation plate 3 is made of non-breathable material.
[0039] The end of the movable baffle 41 is in contact with the surface of the telescopic baffle 45. The waste collection box 43 is slidably mounted with symmetrically arranged telescopic baffles 45 on the side surface near the movable baffle 41. The surfaces of the two telescopic baffles 45 that are close to each other are mounted with protruding strips, and the surface of the protruding strips and the tail end surface of the movable baffle 41 are movably connected by a support rod 44 through a universal joint.
[0040] The connection between the transfer pipe plate 13 and the inner wall of the screening and separation box 1 is located between the coarse screen plate 11 and the fine screen plate 12, and between the isolation plate 3 and the receiving bottom plate 42, respectively. The mesh number of the coarse screen plate 11 is smaller than that of the fine screen plate 12.
[0041] Specifically, the cross-sectional width of the transfer pipe plate 13 is the same as the cross-sectional width of the receiving base plate 42 and both are smaller than the internal cross-sectional width of the screening and separation box 1.
[0042] During grain screening, the grain mixture to be screened is placed inside the screening and separation box 1 and coarsely screened by the coarse screen plate 11. Impurities larger than the grain volume in the grain mixture are left on the surface of the coarse screen plate 11. After coarse screening, the grain mixture is screened by the fine screen plate 12. Fine ash is screened to the surface of the isolation plate 3, and the grain after preliminary screening is left on the surface of the fine screen plate 12. As the grain accumulation height on the surface of the fine screen plate 12 increases, the grain after preliminary screening is transferred to the surface of the pleated plate 46 through the transfer pipe plate 13. By controlling the opening time of the electronic valve, the amount of grain transferred to the surface of the pleated plate 46 can be reduced and the valve can be opened intermittently.
[0043] After the electronic valve releases grain onto the surface of the pleated plate 46, the impurities mixed in the grain have wrinkled textures on their surface. When the slope of the receiving base plate 42 is small, the relatively dense wrinkles on the surface of the pleated plate 46 can prevent the impurities from continuing to move downwards, while the relatively smooth grain particles can roll down along the surface of the pleated plate 46. At this time, the movable baffle 41 is in an inclined state, which drives the two telescopic baffles 45 to fit tightly together and seal the surface of the waste collection box 43. There is a gap between the movable baffle 41 and the surface of the waste collection box 43, which makes it easy for the rolling grain particles to fall below the receiving base plate 42.
[0044] Then, the servo motor 6 drives the movable baffle 41 to reset, so that the movable baffle 41 fits against the edge of the receiving base plate 42. This causes the telescopic baffle 45 to open in opposite directions, and the fan 7 is started. The generated wind force lifts the impurities stuck on the surface of the pleated plate 46, so that the impurities can be removed from the surface of the pleated plate 46 and roll down along the pleated plate 46 into the interior of the waste collection box 43 (because the movable baffle 41 fits against the surface of the telescopic baffle 45, forming an effective sealing treatment, the impurities can only enter the interior of the waste collection box 43).
[0045] The electronic valve is then reopened to continue the screening and separation operation.
[0046] Thus, when it is impossible to separate impurities in the grain that are similar in size and weight to the grain particles but differ only in the degree of surface wrinkling through screening or winnowing (because under normal circumstances, the high-quality grain particles screened are relatively smooth), after coarse screening by the coarse screen plate 11 and fine screen plate 12 of the present invention, selective screening and separation are carried out by the two screening units 4, which effectively improves the separation quality.
[0047] A cleaning rod 21 is installed through the inner wall of the screening and separation box 1, and convex strips 22 are symmetrically arranged on the surface of the cleaning rod 21. The top of the convex strips 22 is in contact with the bottom surface of the coarse screen plate 11. A servo motor 2 is symmetrically arranged on one side of the outer wall of the screening and separation box 1, and the output ends of the two servo motors 2 are respectively connected to one end of the two cleaning rods 21.
[0048] The horizontal distance between the cleaning rod 21 and the inner wall of the screening and separation box 1 is greater than the length of the convex strip 22, and the connection position between the support rod 5 and the coarse screen plate 11 is located in the middle of the two cleaning rods 21.
[0049] Specifically, to avoid clogging of the coarse screen plate 11 and the fine screen plate 12, the servo motor 2 drives the cleaning rod 21 to rotate, which in turn drives the convex strip plate 22 to rotate, creating a periodic shaking effect on the coarse screen plate 11. Under the connection of the support rod 5, the fine screen plate 12 shakes synchronously with the coarse screen plate 11, achieving the effect of preventing clogging.
[0050] There is a vertical gap between the receiving base plate 42 and the bottom wall of the screening and separation box 1, and an L-shaped discharge trough plate is slidably installed on the front of the screening and separation box 1 near the bottom, and the top of the discharge trough plate is in contact with the bottom edge of the receiving base plate 42.
[0051] Specifically, during discharge, pulling the discharge trough plate will collect and clean the high-quality grain particles that have been screened and fallen onto the surface of the discharge trough plate from the inside of the screening and separation box 1. Since the top of the discharge trough plate is in contact with the bottom of the receiving base plate 42, it can achieve a good centralized cleaning effect.
[0052] Example 2
[0053] Figures 10-12 A shaft is installed through the telescopic baffle 45 on the side away from the convex strip, and both ends of the shaft are rotatably connected to the inner wall of the waste collection box 43. A reset spring strip 8 with its tail end connected to the inner wall of the waste collection box 43 is connected to the back side of the telescopic baffle 45 on the side away from the convex strip.
[0054] In the initial state, the telescopic baffle 45 is tilted inward, and a threshold strip is installed on the inner bottom wall of the waste collection box 43, with the threshold strip located between the telescopic baffle 45 and the movable baffle 41.
[0055] The end of the reset spring bar 8 is connected to the surface of the waste collection box 43 and the telescopic baffle 45 through a movable shaft, and the top of the discharge trough plate is provided with a notch that fits into the fan 7.
[0056] Specifically, when the telescopic baffle 45 is in the open state, part of the telescopic baffle 45 is in a vertical position, which reduces the effective opening area of the waste collection box 43 and makes it difficult for impurities to enter and be collected. To solve the above problem, this embodiment is adopted.
[0057] When the telescopic baffle 45 is closed, the return spring bar 8 is stretched, allowing the telescopic baffle 45 to move. After the telescopic baffle 45 is open, under the elastic action of the return spring bar 8, the telescopic baffle 45 deflects around the shaft to a certain extent until the return spring bar 8 returns to its initial length. At this time, the telescopic baffle 45 is in an inward tilting state, which facilitates the complete entry of impurities into the interior of the waste collection box 43.
[0058] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Various changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.
Claims
1. An impurity separation device for a grain suction machine, comprising a screening and separation box (1), characterized in that: The inner wall of the screening and separation box (1) is equipped with a coarse screen plate (11) and a fine screen plate (12) arranged vertically. The outer surfaces of the coarse screen plate (11) and the fine screen plate (12) are in close contact with the inner wall of the screening and separation box (1). The coarse screen plate (11) and the fine screen plate (12) are connected by a support rod (5). An isolation plate (3) located below the fine screen plate (12) is fixedly installed on the inner wall of the screening and separation box (1). A transfer pipe plate (13) is installed through the inner wall of the screening and separation box (1). An electronic valve is installed inside; a two-screen unit (4) is installed below the isolation plate (3), the two-screen unit (4) includes a receiving base plate (42) that is inclinedly installed on the inner wall of the screening and separation box (1), a pleated plate (46) made of breathable material is installed on the top of the receiving base plate (42), a movable baffle (41) and a waste collection box (43) are symmetrically installed on the top of the pleated plate (46), and the waste collection box (43) is located away from the transfer pipe plate (13), and the bottom of the receiving base plate (42) is close to the side of the receiving base plate (42). A symmetrically arranged servo motor (6) is installed, and the output end of the servo motor (6) passes through the interior of the corrugated plate (46) and is connected to the movable baffle (41). A discharge pipe (431) extending to the outside of the screening and separation box (1) is installed through the bottom of the waste collection box (43). The end of the movable baffle (41) is in close contact with the surface of the telescopic baffle (45). A symmetrically arranged telescopic baffle (45) is slidably installed on the side of the waste collection box (43) near the movable baffle (41). The two telescopic baffles (45) are close to each other. The surface near the convex plate is equipped with a convex plate strip, and the surface of the convex plate strip and the tail end surface of the movable baffle (41) are movably connected by a support rod (44) through a universal joint; the telescopic baffle (45) is equipped with a shaft rod through the side away from the convex plate strip, and the two ends of the shaft rod are rotatably connected to the inner wall of the waste collection box (43); the back of the telescopic baffle (45) away from the convex plate strip is connected with a return spring strip (8) whose tail end is connected to the inner wall of the waste collection box (43); a fan (7) is installed at the bottom of the supporting base plate (42), and the isolation plate (3) is made of non-breathable material; The operating method of the device includes the following steps: S1. Coarse and fine screening: After the material enters the screening and separation box (1), it is coarsely and finely screened by the coarse screen plate (11) and the fine screen plate (12). The material after preliminary separation enters the surface of the pleated plate (46) through the transfer pipe plate (13). S2. Screening based on surface smoothness: The electronic valve is opened and the material falls onto the pleated plate (46); the pleats on the surface of the pleated plate (46) prevent impurities with pleated textures from moving down, while the relatively smooth grain particles roll down along the surface of the pleated plate (46); at this time, the servo motor (6) drives the movable baffle (41) to be in an inclined state, and the movable baffle (41) drives the telescopic baffle (45) to fit tightly through the support rod (44), sealing the surface of the waste collection box (43), and there is a gap between the movable baffle (41) and the surface of the waste collection box (43), so that the rolling grain particles pass through the gap and fall down; S3. Airflow-assisted impurity removal: Subsequently, the servo motor (6) drives the movable baffle (41) to reset. The movable baffle (41) drives the telescopic baffle (45) to open in opposite directions through the support rod (44). The fan (7) is started. The wind force generated by the fan lifts the impurities stuck on the surface of the pleated plate (46), causing the impurities to detach from the pleated plate (46) and roll into the waste collection box (43).
2. The impurity separation device for a grain suction machine according to claim 1, characterized in that: The connection between the transfer pipe plate (13) and the inner wall of the screening and separation box (1) is located in the middle of the coarse screen plate (11) and the fine screen plate (12), and in the middle of the isolation plate (3) and the receiving bottom plate (42), respectively. The mesh number of the coarse screen plate (11) is smaller than that of the fine screen plate (12).
3. The impurity separation device for a grain suction machine according to claim 1, characterized in that: The inner wall of the screening and separation box (1) is equipped with a cleaning rod (21), and the surface of the cleaning rod (21) is equipped with symmetrically arranged raised strips (22), and the top of the raised strips (22) is in contact with the bottom surface of the coarse screen plate (11). A symmetrically arranged servo motor (2) is installed on one side of the outer wall of the screening and separation box (1), and the output ends of the two servo motors (2) are respectively connected to one end of the two cleaning rods (21).
4. The impurity separation device for a grain suction machine according to claim 3, characterized in that: The horizontal distance between the cleaning rod (21) and the inner wall of the screening and separation box (1) is greater than the length of the convex strip (22), and the connection position between the support rod (5) and the coarse screen plate (11) is located in the middle of the two cleaning rods (21).
5. The impurity separation device for a grain suction machine according to claim 1, characterized in that: There is a vertical gap between the receiving base plate (42) and the bottom wall of the screening and separation box (1), and an L-shaped discharge trough plate is slidably installed on the front of the screening and separation box (1) near the bottom, and the top of the discharge trough plate is in contact with the bottom edge of the receiving base plate (42).
6. The impurity separation device for a grain suction machine according to claim 5, characterized in that: In the initial state, the telescopic baffle (45) is tilted inward, and a threshold strip is installed on the inner bottom wall of the waste collection box (43), and the threshold strip is located between the telescopic baffle (45) and the movable baffle (41).
7. The impurity separation device for a grain suction machine according to claim 5, characterized in that: The end of the reset spring bar (8) is connected to the surface of the waste collection box (43) and the telescopic baffle (45) through a movable shaft, and the top of the discharge trough plate is provided with a notch that fits into the fan (7).