Agricultural product impurity cleaning equipment

Abstract

The utility model belongs to the technical field of grain screening, and particularly relates to agricultural product impurity cleaning equipment. The utility model provides impurity cleaning equipment for agricultural products. The agricultural product impurity cleaning equipment comprises a rack, a rack feeding port is formed in the upper end of the rack, and the agricultural product impurity cleaning equipment is characterized in that an inclined upper screen assembly is arranged on the upper portion in the rack, and an inclined lower screen assembly is arranged in the portion, below the upper screen assembly, in the rack; the high end of the upper screen assembly is arranged below the feeding port of the rack, and the high end of the lower screen assembly is arranged below the low end of the upper screen assembly. A lower impurity discharging opening is formed in the rack and corresponds to the lower end of the lower screen assembly; the rack is provided with an upper impurity discharge port corresponding to the lower end of the upper screen assembly; an upper vibration motor used for driving the upper screen assembly to vibrate is arranged on the machine frame, material blocking plates consistent with the upper screen assembly in inclination direction are arranged in the machine frame below the upper screen assembly and above the lower screen assembly, and the lower ends of the material blocking plates are material blocking plate discharging ends.

Description

Technical Field

[0001] This utility model belongs to the field of grain screening technology, and in particular relates to an agricultural product impurity cleaning device. Background Technology

[0002] In grain processing, screening is a crucial step in removing impurities and grading grains. Traditional screening machines suffer from problems such as fixed screen aperture, low screening efficiency, easy clogging, and difficulty in effectively controlling grain flow, affecting the quality and efficiency of grain processing and failing to meet the demands of modern grain processing industries for high-precision and high-efficiency processing. Therefore, it is necessary to design a new type of agricultural product impurity cleaning equipment to solve the above problems. Utility Model Content

[0003] This utility model addresses the aforementioned problems by providing a device for cleaning impurities from agricultural products.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: the agricultural product impurity cleaning equipment of the present invention includes a frame 9, with a feed inlet at the upper end of the frame 9. The frame 9 is characterized by having an inclined upper screen assembly 11 at its upper part, and an inclined lower screen assembly 12 below the upper screen assembly 11 within the frame 9. The upper screen assembly 11 is positioned below the feed inlet of the frame 9, and the lower screen assembly 12 is positioned below the lower end of the upper screen assembly 11. A lower impurity discharge port is provided on the frame 9 corresponding to the lower end of the lower screen assembly 12; and an upper impurity discharge port is provided on the frame 9 corresponding to the lower end of the upper screen assembly 11.

[0005] The frame 9 is equipped with an upper vibration motor 13 for driving the upper screen assembly 11 to vibrate. Below the upper screen assembly 11 and above the lower screen assembly 12, the frame 9 is equipped with a baffle plate 7 that is inclined in the same direction as the upper screen assembly 11. The lower end of the baffle plate 7 is the discharge end of the baffle plate 7, and the discharge end of the baffle plate 7 is located above the upper end of the lower screen assembly 12.

[0006] The frame 9 is equipped with a lower vibration motor 16 for driving the lower screen assembly 12 to vibrate. The frame 9 below the lower screen assembly 12 is equipped with a discharge trough plate 10 that is in the same direction of inclination as the lower screen assembly 12. The frame 9 is equipped with a discharge port corresponding to the lower end of the discharge trough plate 10.

[0007] As a preferred embodiment, the feed inlet of the machine frame of this utility model is provided with a feed baffle 5, which includes an upper U-shaped baffle and a lower inverted trapezoidal baffle, with the lower end of the inverted trapezoidal baffle connected to the feed inlet of the machine frame.

[0008] As another preferred embodiment, the upper screen assembly 11 of this utility model includes an upper upper screen and a lower upper screen, and the frame 9 is provided with an upper screen driving device for changing the relative position of the upper upper screen and the lower upper screen.

[0009] The lower screen assembly 12 includes an upper lower screen 22 and a lower lower screen 23. The frame 9 is equipped with a lower screen drive device for changing the relative position of the upper lower screen 22 and the lower lower screen 23.

[0010] As another preferred embodiment, the upper screen drive device of this utility model includes an upper X-axis electric push rod 20 and an upper Y-axis electric push rod 19. The upper X-axis electric push rod 20 is mounted on the frame 9 at the lower end of the upper screen assembly 11, and the inclination direction of the upper X-axis electric push rod 20 is consistent with the inclination direction of the upper screen assembly 11. The outer end of the upper X-axis electric push rod 20 abuts against the lower end of the upper screen. An upper X-axis L-shaped hook is provided at the outer end of the upper X-axis electric push rod 20, and the lower end frame of the upper screen rests inside the upper X-axis L-shaped hook. The upper Y-axis electric push rod 19 is mounted on the frame 9 on the side of the upper screen assembly 11, and the outer end of the upper Y-axis electric push rod 19 abuts against the side end of the upper screen. An upper Y-axis L-shaped hook is provided at the outer end of the upper Y-axis electric push rod 19, and the side frame of the upper screen rests inside the upper Y-axis L-shaped hook.

[0011] The lower screen drive device includes a lower X-axis electric push rod 17 and a lower Y-axis electric push rod 18. The lower X-axis electric push rod 17 is mounted on the frame 9 at the lower end of the lower screen assembly 12. The inclination direction of the lower X-axis electric push rod 17 is consistent with the inclination direction of the lower screen assembly 12. The outer end of the lower X-axis electric push rod 17 abuts against the lower end of the upper lower screen 22. A lower X-axis L-shaped hook is provided at the outer end of the lower X-axis electric push rod 17, and the lower end frame of the upper lower screen 22 is located inside the lower X-axis L-shaped hook. The lower Y-axis electric push rod 18 is mounted on the frame 9 on the side of the lower screen assembly 12. The outer end of the lower Y-axis electric push rod 18 abuts against the side end of the upper lower screen 22. A lower Y-axis L-shaped hook 21 is provided at the outer end of the lower Y-axis electric push rod 18, and the side frame of the upper lower screen 22 is located inside the lower Y-axis L-shaped hook 21.

[0012] As another preferred embodiment, the present invention has two upper X-direction electric push rods 20, which are arranged on both sides of the upper screen assembly 11; and two lower X-direction electric push rods 17, which are arranged on both sides of the lower screen assembly 12.

[0013] As another preferred embodiment, the present invention provides an upper waste discharge plate 15 at the upper waste discharge port. The upper waste discharge plate 15 is inclined in the same direction as the upper screen assembly 11. The upper end of the upper waste discharge plate 15 is connected to the frame 9 by fasteners, and the lower end of the upper waste discharge plate 15 is located outside the frame 9. An upper waste discharge collection box is provided below the lower end of the upper waste discharge plate 15.

[0014] A lower waste discharge plate 3 is provided at the lower waste discharge port. The lower waste discharge plate 3 is inclined in the same direction as the lower screen assembly 12. The upper end of the lower waste discharge plate 3 is connected to the frame 9 by fasteners, and the lower end of the lower waste discharge plate 3 is located outside the frame 9. A lower waste discharge collection box is provided below the lower end of the lower waste discharge plate 3.

[0015] As another preferred embodiment, the frame 9 below the high end of the baffle plate 7 of this utility model is provided with an exhaust port, which is connected to the inlet of the fan 4 through an exhaust pipe 14. The outlet of the fan 4 is connected to the upper inlet of the cyclone separator 2, and the lower outlet of the cyclone separator 2 is provided with an ash storage bin 1. An air inlet is provided at the upper end of the frame 9, and an air cap 6 is provided at the air inlet.

[0016] As another preferred embodiment, a conveyor belt 31 is provided below the grain silo outlet 26 of this utility model, with the inlet end of the conveyor belt 31 located below the grain silo outlet 26 and the outlet end of the conveyor belt 31 located above the screening machine inlet.

[0017] As another preferred embodiment, the present invention provides a grain outlet control module 34 at the grain outlet 26 of the grain silo.

[0018] As another preferred embodiment, the conveyor belt 31 of the present invention is provided with a plurality of strip-shaped protrusions 36, the length direction of the strip-shaped protrusions 36 being perpendicular to the conveying direction of the conveyor belt 31, and the plurality of strip-shaped protrusions 36 being evenly distributed along the conveying direction of the conveyor belt 31.

[0019] As another preferred embodiment, the conveyor belt 31 of this utility model is provided with strip-shaped protrusions 36. These protrusions can effectively increase the friction between the grain and the conveyor belt 31, prevent the grain from sliding downward due to gravity, and ensure the stability and accuracy of the grain during the conveying process.

[0020] As another preferred embodiment, the grain outlet control module 34 of this utility model includes a guide rail motor 24. The output shaft of the guide rail motor 24 is connected to the lead screw 29 through a coupling 27. The lead screw 29 rotates through the threaded hole on the slider 28. The slider 28 is set on the guide rail 30, and the grain outlet control plate 25 is set on the slider 28.

[0021] As another preferred embodiment, the conveyor belt 31 of this invention is provided with an infrared sensor 32 for monitoring the amount of grain conveyed.

[0022] As another preferred embodiment, the infrared sensors 32 of this invention are in four pairs, correspondingly arranged on both sides of the conveyor belt 31; the four pairs of infrared sensors are arranged from top to bottom.

[0023] Secondly, the conveyor belt 31 of this utility model includes a front horizontal conveyor belt and a rear inclined conveyor belt. The feed end of the horizontal conveyor belt is located below the grain bin discharge port 26. The lower end of the inclined conveyor belt is the docking end with the horizontal conveyor belt, and the upper end of the inclined conveyor belt is the discharge end of the conveyor belt 31.

[0024] In addition, sensor mounting brackets are provided on both sides of the lower end of the inclined conveyor belt of this utility model. Vertical strip holes 37 are provided on the sensor mounting brackets. Infrared sensors 32 pass through the vertical strip holes 37 and are connected to the sensor mounting brackets through their own external threads and nuts.

[0025] The beneficial effects of this utility model.

[0026] This utility model of agricultural product impurity cleaning equipment adopts a structure with an inclined upper screen assembly 11 and an inclined lower screen assembly 12. Compared with the traditional linear screen layout, this greatly increases the movement path and residence time of grain on the screen, effectively improving screening efficiency. Simultaneously, both the upper screen assembly 11 and the lower screen assembly 12 are equipped with vibration motors. The upper screen assembly 11 mainly performs preliminary screening for larger impurities, while the lower screen assembly 12 separates smaller diameter impurities. Their coordinated operation further enhances the accuracy and effectiveness of screening.

[0027] After being screened by the upper screen assembly 11, the grain falls onto the baffle plate 7 and continues to move to the lower screen assembly 12 for secondary screening under the action of gravity. The qualified grain falls into the discharge trough plate 10 for collection, while the remaining small impurities fall into the impurity collection box from the impurity discharge port, thus realizing the effective separation and classification collection of grain and impurities.

[0028] The baffle plate 7 can send all the grain that has passed the initial screening to the highest point of the lower screen for a second and complete screening. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0030] Figure 1 This is a schematic diagram of the structure of the agricultural product impurity cleaning equipment of this utility model.

[0031] Figure 2 This is a side view of the agricultural product impurity cleaning equipment of this utility model.

[0032] Figure 3 This is a schematic diagram of the components on the frame after the side plates of the frame have been removed.

[0033] Figure 4 yes Figure 3 Enlarged view of part A.

[0034] Figure 5 yes Figure 3 Enlarged view of part B.

[0035] Figure 6 , Figure 7 This is a schematic diagram of the grain outlet control module of this utility model.

[0036] Figure 8 This is a diagram showing the overall usage state of this utility model.

[0037] Figure 9 yes Figure 8 Enlarged view of part C.

[0038] Figures 10-12 This is the circuit diagram of the power supply section of this utility model.

[0039] Figure 13 This is a circuit diagram of the power supply section of the vibration motor of this utility model.

[0040] Figure 14 This is the circuit schematic diagram of the main control part of this utility model.

[0041] Figure 15 This is a circuit diagram of the infrared sensor part of this utility model.

[0042] Figure 16 This is a circuit diagram of the electric actuator drive section of this utility model.

[0043] Figure 17 This is the circuit diagram of the guide rail motor control part of this utility model.

[0044] Figure 18 This is the circuit diagram of the fan drive part of this utility model.

[0045] Figure 19 , Figure 20 This is the circuit diagram of the vibration motor control part of this utility model.

[0046] Figure 21 This is a circuit diagram of the control part of the conveyor belt drive motor of this utility model.

[0047] Figures 1-9In the diagram, 1 is the ash storage bin, 2 is the cyclone separator, 3 is the lower waste discharge plate, 4 is the blower, 5 is the feed baffle, 6 is the air cap, 7 is the baffle plate, 8 is the motor base, 9 is the frame, 10 is the discharge chute, 11 is the upper screen assembly, 12 is the lower screen assembly, 13 is the upper vibrating motor, 14 is the exhaust pipe, 15 is the upper waste discharge plate, 16 is the lower vibrating motor, 17 is the lower X-axis electric push rod, 18 is the lower Y-axis electric push rod, and 19 is the upper Y-axis electric push rod. 0 is the upper X-axis electric push rod, 21 is the lower Y-axis L-shaped hook, 22 is the upper lower screen, 23 is the lower lower screen, 24 is the guide rail motor, 25 is the grain outlet control board, 26 is the grain bin outlet, 27 is the coupling, 28 is the slider, 29 is the lead screw, 30 is the guide rail, 31 is the conveyor belt, 32 is the infrared sensor, 33 is the grain bin, 34 is the grain outlet control module, 35 is the conveyor belt drive motor, 36 is the strip-shaped protrusion, and 37 is the vertical strip-shaped hole. Detailed Implementation

[0048] like Figure 1 As shown, the agricultural product impurity cleaning equipment of this utility model includes a frame 9. A feed inlet is provided at the upper end of the frame 9. An inclined upper screen assembly 11 is provided in the upper part of the frame 9, and an inclined lower screen assembly 12 is provided in the frame 9 below the upper screen assembly 11. The upper end of the upper screen assembly 11 is located below the feed inlet of the frame 9, and the upper end of the lower screen assembly 12 is located below the lower end of the upper screen assembly 11. A lower impurity discharge port is provided on the frame 9 corresponding to the lower end of the lower screen assembly 12; an upper impurity discharge port is provided on the frame 9 corresponding to the lower end of the upper screen assembly 11.

[0049] The frame 9 is equipped with an upper vibration motor 13 for driving the upper screen assembly 11 to vibrate. Below the upper screen assembly 11 and above the lower screen assembly 12, the frame 9 is equipped with a baffle plate 7 that is inclined in the same direction as the upper screen assembly 11. The lower end of the baffle plate 7 is the discharge end of the baffle plate 7, and the discharge end of the baffle plate 7 is located above the upper end of the lower screen assembly 12.

[0050] The frame 9 is equipped with a lower vibration motor 16 for driving the lower screen assembly 12 to vibrate. The frame 9 below the lower screen assembly 12 is equipped with a discharge trough plate 10 that is in the same direction of inclination as the lower screen assembly 12. The frame 9 is equipped with a discharge port corresponding to the lower end of the discharge trough plate 10.

[0051] The screen aperture size of the upper screen assembly 11 is larger than that of the lower screen assembly 12.

[0052] Figure 1 This is a schematic diagram after removing the side panels of frame 9. To show the internal structure, the actual product has side panels to prevent materials from falling from both sides of frame 9.

[0053] The vibratory motor is connected to the motor base 8 by bolts. The motor base 8 is connected to the screen frame, and the vibration is transmitted to the screen through the motor base 8.

[0054] A feed baffle 5 is provided at the feed inlet of the frame. The feed baffle 5 includes an upper U-shaped baffle and a lower inverted trapezoidal baffle. The lower end of the inverted trapezoidal baffle is connected to the feed inlet of the frame.

[0055] The upper screen assembly 11 includes an upper upper screen and a lower upper screen, and the frame 9 is provided with an upper screen drive device for changing the relative position of the upper upper screen and the lower upper screen.

[0056] The lower screen assembly 12 includes an upper lower screen 22 and a lower lower screen 23. The frame 9 is equipped with a lower screen drive device for changing the relative position of the upper lower screen 22 and the lower lower screen 23.

[0057] The upper screen drive device includes an upper X-axis electric push rod 20 and an upper Y-axis electric push rod 19. The upper X-axis electric push rod 20 is mounted on the frame 9 at the lower end of the upper screen assembly 11. The inclination direction of the upper X-axis electric push rod 20 is consistent with the inclination direction of the upper screen assembly 11. The outer end of the upper X-axis electric push rod 20 abuts against the lower end of the upper screen. An upper X-axis L-shaped hook is provided at the outer end of the upper X-axis electric push rod 20, and the lower end frame of the upper screen rests inside the upper X-axis L-shaped hook. The upper Y-axis electric push rod 19 is mounted on the frame 9 on the side of the upper screen assembly 11. The outer end of the upper Y-axis electric push rod 19 abuts against the side end of the upper screen. An upper Y-axis L-shaped hook is provided at the outer end of the upper Y-axis electric push rod 19, and the side frame of the upper screen rests inside the upper Y-axis L-shaped hook.

[0058] The lower screen drive device includes a lower X-axis electric push rod 17 and a lower Y-axis electric push rod 18. The lower X-axis electric push rod 17 is mounted on the frame 9 at the lower end of the lower screen assembly 12. The inclination direction of the lower X-axis electric push rod 17 is consistent with the inclination direction of the lower screen assembly 12. The outer end of the lower X-axis electric push rod 17 abuts against the lower end of the upper lower screen 22. A lower X-axis L-shaped hook is provided at the outer end of the lower X-axis electric push rod 17, and the lower end frame of the upper lower screen 22 is located inside the lower X-axis L-shaped hook. The lower Y-axis electric push rod 18 is mounted on the frame 9 on the side of the lower screen assembly 12. The outer end of the lower Y-axis electric push rod 18 abuts against the side end of the upper lower screen 22. A lower Y-axis L-shaped hook 21 is provided at the outer end of the lower Y-axis electric push rod 18, and the side frame of the upper lower screen 22 is located inside the lower Y-axis L-shaped hook 21.

[0059] The outer end of the electric push rod presses against the upper screen to push it out. The L-shaped hook can pull the upper screen back.

[0060] There are two upper X-axis electric push rods 20, which are arranged on both sides of the upper screen assembly 11; there are two lower X-axis electric push rods 17, which are arranged on both sides of the lower screen assembly 12.

[0061] Two Y-axis electric actuators can also be used, located on the upper and lower parts of the side of the screen.

[0062] Two X-axis electric actuators move simultaneously, and two Y-axis electric actuators move simultaneously.

[0063] In the screen assembly, the lower screen is fixedly connected to the frame 9, and the upper screen can move on the lower screen.

[0064] The upper screen assembly 11 and the lower screen assembly 12 adopt a double-layer screen structure, with the upper and lower screens stacked on top of each other. By controlling the electric push rod, the position of the upper screen can be precisely changed, thereby flexibly adjusting the aperture size between the upper and lower screens. This variable aperture design allows the screening machine to adapt to screening operations with different particle size requirements, effectively separating both larger and smaller diameter impurities. For example, when screening different varieties or at different processing stages of grain, the screen aperture only needs to be adjusted according to the target impurity particle size.

[0065] When the screen becomes clogged, the blockage can be cleared by changing the aperture between the upper and lower screen layers. This variable aperture design gives the screen a certain degree of self-cleaning function, reducing the frequency and workload of manual cleaning, minimizing equipment downtime due to clogging, and ensuring the continuity of screening operations.

[0066] An upper waste discharge plate 15 is provided at the upper waste discharge port. The upper waste discharge plate 15 is inclined in the same direction as the upper screen assembly 11. The upper end of the upper waste discharge plate 15 is connected to the frame 9 by fasteners, and the lower end of the upper waste discharge plate 15 is located outside the frame 9. An upper waste discharge collection box is provided below the lower end of the upper waste discharge plate 15.

[0067] A lower waste discharge plate 3 is provided at the lower waste discharge port. The lower waste discharge plate 3 is inclined in the same direction as the lower screen assembly 12. The upper end of the lower waste discharge plate 3 is connected to the frame 9 by fasteners, and the lower end of the lower waste discharge plate 3 is located outside the frame 9. A lower waste discharge collection box is provided below the lower end of the lower waste discharge plate 3.

[0068] An exhaust port is provided on the frame 9 below the high end of the baffle plate 7. The exhaust port is connected to the inlet of the fan 4 through the exhaust pipe 14. The outlet of the fan 4 is connected to the upper inlet of the cyclone separator 2. A ash storage bin 1 is provided at the lower outlet of the cyclone separator 2. An air inlet is provided at the upper end of the frame 9, and an air cap 6 is provided at the air inlet.

[0069] A cyclone separator 2 is installed on one side of the screening machine, with airflow provided by a fan 4. This also helps to keep the screening site clean and reduce the risk of dust contamination to subsequent grain processing stages.

[0070] A conveyor belt 31 is installed below the grain silo outlet 26. The feed end of the conveyor belt 31 is located below the grain silo outlet 26, and the discharge end of the conveyor belt 31 is located above the screening machine inlet.

[0071] A grain discharge control module 34 is installed at 26 grain discharge outlets.

[0072] The conveyor belt 31 is provided with a plurality of strip-shaped protrusions 36, the length direction of the strip-shaped protrusions 36 is perpendicular to the conveying direction of the conveyor belt 31, and the plurality of strip-shaped protrusions 36 are evenly distributed along the conveying direction of the conveyor belt 31.

[0073] The conveyor belt 31 is provided with strip-shaped protrusions 36. These protrusions can effectively increase the friction between the grain and the conveyor belt 31, prevent the grain from sliding downward due to gravity, and ensure the stability and accuracy of the grain during the conveying process.

[0074] The grain outlet control module 34 includes a guide rail motor 24. The output shaft of the guide rail motor 24 is connected to the lead screw 29 through a coupling 27. The lead screw 29 rotates through the threaded hole on the slider 28. The slider 28 is set on the guide rail 30, and the grain outlet control plate 25 is set on the slider 28.

[0075] The movement of the slider 28 is controlled by the forward and reverse rotation of the guide rail motor 24, thereby changing the area of ​​the grain bin outlet 26 that is blocked by the grain outlet control plate 25. This design can precisely control the flow rate of falling grain according to actual production needs, ensuring that the grain is evenly distributed on the conveyor belt 31. For example, when docking with subsequent processing equipment or storage facilities, the grain discharge flow rate can be flexibly adjusted according to their processing capacity or storage capacity, avoiding problems such as processing interruption or storage overflow caused by unstable grain flow.

[0076] The conveyor belt 31 is equipped with an infrared sensor 32 for monitoring the amount of grain conveyed.

[0077] The infrared sensors 32 consist of four pairs, which are correspondingly arranged on both sides of the conveyor belt 31; the four pairs of infrared sensors are arranged from top to bottom.

[0078] Four pairs of infrared sensors are installed on both sides of the conveyor belt 31, forming a total grain quantity detection system. This system calculates the total grain quantity by monitoring the height or volume of grain accumulation on the conveyor belt 31 in real time. When excessive grain is detected, the control system automatically adjusts the speed of the conveyor belt 31, thereby controlling the instantaneous screening volume at the screening machine's inlet. This closed-loop control effectively prevents problems such as reduced screening efficiency and screen blockage caused by excessive grain entering the screening machine, ensuring the efficient and stable operation of the entire grain processing system.

[0079] The conveyor belt 31 includes a front horizontal conveyor belt and a rear inclined conveyor belt. The feed end of the horizontal conveyor belt is located below the grain bin discharge port 26. The lower end of the inclined conveyor belt is the docking end with the horizontal conveyor belt, and the upper end of the inclined conveyor belt is the discharge end of the conveyor belt 31.

[0080] Sensor mounting brackets are provided on both sides of the lower end of the inclined conveyor belt. Vertical strip-shaped holes 37 are provided on the sensor mounting brackets. Infrared sensors 32 pass through the vertical strip-shaped holes 37 and are connected to the sensor mounting brackets through their own external threads and nuts.

[0081] The infrared sensor 32 can be an Attorneyson visible-red M12 through-beam photoelectric sensor E3FJ-30NA / 30NL. This sensor has its own external thread.

[0082] The control system of this agricultural product impurity cleaning equipment includes a power supply section, a vibration motor power supply section, a main control section, an infrared sensor section, an electric push rod drive section, a guide rail motor 24 control section, a fan drive section, a vibration motor control section, and a conveyor belt drive motor 35 control section. The power output port of the power supply section is connected to the power ports of the vibration motor power supply section, the main control section, the infrared sensor section, the electric push rod drive section, the guide rail motor 24 control section, the fan drive section, the vibration motor control section, and the conveyor belt drive motor 35 control section, respectively.

[0083] The detection signal output port of the infrared sensor is connected to the detection signal input port of the main control unit;

[0084] The control signal output port of the main control unit is connected to the control signal input port of the conveyor belt drive motor 35 control unit, the control signal input port of the vibration motor power supply unit, the control signal input port of the electric push rod drive unit, the control signal input port of the guide rail motor 24 control unit, the control signal input port of the fan drive unit, the control signal input port of the vibration motor control unit, and the control signal input port of the conveyor belt drive motor 35 control unit, respectively.

[0085] To prevent grain from accumulating or even overflowing at the feed inlet of the screening machine (i.e., the agricultural product impurity cleaning equipment of this utility model), the main control part of this utility model receives the detection signal from the infrared sensor part and controls the speed of the conveyor belt and the amount of grain accumulating on the conveyor belt through the conveyor belt drive motor control part. At the same time, it realizes automatic shutdown of the equipment when there is no grain on the conveyor belt.

[0086] The main control unit of this utility model controls the working state of the vibration motor through the vibration motor control unit, so as to complete the impurity screening work efficiently and reliably.

[0087] The main control unit of this utility model controls the electric push rod through the electric push rod drive unit to adjust the screen hole size and adapt to screening operations with different particle size requirements.

[0088] The main control unit of this utility model controls the size of the grain outlet of the grain bin through the guide rail motor control unit, and precisely controls the flow rate of grain falling according to actual production needs to ensure that the grain is evenly distributed on the conveyor belt.

[0089] The main control unit of this utility model controls the operation of the cyclone separator fan through the fan drive unit, which can collect the dust generated during the screening process in a timely manner and avoid dust flying and causing harm to the environment and operators.

[0090] The power supply section includes an XJ3-G line sequence relay JQ1. Pins 1, 2, and 3 of JQ1 are connected to U-IN, V-IN, and W-IN respectively. Pin 5 of JQ1 is connected to pin 3 of the LRS-100-12 module POW2. Pin 1 of POW2 is connected to V-IN through an emergency stop switch K2. The V+ port of POW2 is connected to +12V.

[0091] Connect pin 1 of the WRB1215MD-6W module POW1 to +12V, and connect the Vo+ port of POW1 to +15V2.

[0092] Connect pin 1 of the WRB1215MD-6W module POW4 to +12V, and connect the Vo+ port of POW4 to +15V1.

[0093] For the A1215S-2W module, pin 1 of POW3 is connected to +12V, pin 3 of POW3 is connected to +15V, and pin 5 of POW3 is connected to -15V.

[0094] Pin 1 of the LM2576-5.0 module U17 is connected to +12V, and pin 2 of U17 is connected to pin 4 and +5V respectively through inductor L6;

[0095] For the AMS1117-3.3 module U15, pin 3 is connected to +5V, and pin 2 of U15 is connected to +3.3V.

[0096] Three power supplies, +15V, +15V1, and +15V2, are configured separately and isolated from each other. +15V powers the voltage sensor module. +15V1 drives the Q2 MOSFET. +15V2 drives the Q1 MOSFET. Q1 requires a separate, isolated power supply because its source needs to be connected to the negative terminal of +15V2 to establish a 15V voltage between its gate and source for switching Q1.

[0097] U-IN, V-IN, and W-IN are connected to three-phase power.

[0098] The power supply section of the vibration motor includes an MDS30A1600 module BD10. Pin 1 of BD10 is connected to U-IN through inductor L1, pin 2 of BD10 is connected to V-IN through inductor L4, and pin 3 of BD10 is connected to W-IN through inductor L5. Pin 5 of BD10 is connected to the drain of CRXQ20D120G1 transistor Q2 and the anode of diode D13 through inductor L2. The gate of Q2 is connected to Q2-1, and the source of Q2 is connected to GND-P. The cathode of D13 is connected to the drain of CRXQ20D120G1 transistor Q1, the gate of Q1 is connected to Q1-1, and the source of Q1 is connected to VCC-P through inductor L3.

[0099] The anode of the input terminal of PC817 chip U11 is connected to PA8 through resistor R27. The collector of the output terminal of U11 is connected to +15V2. The emitter of the output terminal of U11 is connected to pin 2 of TC4429 chip U3 through resistor R31. Pins 6 and 7 of U3 are connected to Q1-1 through resistor R34.

[0100] The anode of the input terminal of PC817 chip U16 is connected to PC8 through resistor R36. The collector of the output terminal of U16 is connected to +15V1. The emitter of the output terminal of U16 is connected to pin 2 of TC4429 chip U4 through resistor R37. Pins 6 and 7 of U4 are connected to Q2-1 through resistor R38.

[0101] Pin 1 of the HVS5-25A Hall sensor QU2 is connected to VCC-P via resistors R22 and R21 in sequence. Pin 2 of QU2 is connected to GND-P via resistors R25 and R24 in sequence. Pin 4 of QU2 is connected to pin 3 of the LM331S5 chip U1 via resistor R23. Pin 4 of U1 is connected to ADC0.

[0102] like Figure 12 As shown, the three-phase U-IN, V-IN, and W-IN inputs are filtered by the three-phase rectifier bridge BD10 to obtain a DC voltage of approximately 500V. This voltage is then boosted to approximately 800V by the BOOST boost circuit composed of Q2, L2, D13, and C24, thereby increasing the power supply voltage of the vibratory motor and thus increasing its power. The BACK step-down circuit composed of Q1-1, Q1, D14, L3, and C25 is used to adjust the voltage reduction and control the actual power of the vibratory motor.

[0103] The output value of voltage sensor QU2, which acquires the power supply voltage VCC-P of the vibration motor, is passed through an RC filter composed of R23 and C90 (cutoff frequency 31Hz), and then input to U1 for analog-to-digital conversion. The output ADC0 is then sent to U14. This obtains the voltage value between VCC-P and GND-P, filtering out high-frequency signals above 31Hz.

[0104] U3 is the driver chip, which amplifies the PWM signal of U14 to drive the field-effect transistor.

[0105] The vibration intensity is controlled by combining the voltage value obtained from the QU2 voltage acquisition module (ADC0 detection value) and the vibration intensity input from the touchscreen. Q2-1 is responsible for boosting the voltage to increase the vibration intensity, while Q1-1 is responsible for deflating the voltage to decrease the vibration intensity. Higher voltage results in greater vibration intensity. For example, if the operator sets the maximum vibration intensity, the voltage detected by ADC0 controls the maximum duty cycle of Q2-1, keeping Q1-1 in a normally open state. A larger duty cycle in Q2-1 results in a higher voltage, and a smaller duty cycle in Q1-1 results in a lower voltage.

[0106] The main control unit includes an STM32F103ZET6 chip U14. Pin 34 of U14 is connected to ADC0. Pins 100-102, 46, 47, 133-137, 98, 123, 85, and 86 of U14 are respectively connected to PA8-PA10, PB0, PB1, PB3-PB7, PB11-PB15, PC8, PD7, PD14, and PD15. Pins 141, 142, 1-5, 58-60, 63, 65-68, 10-15, 18-22, and 49 of U14 are respectively connected to PE0-PE10, PE12-PE15, and PF0-PF11.

[0107] Pins 3 and 4 of the DC80480M043_B010_0C touchscreen are connected to PA10 and PA9 respectively.

[0108] The touchscreen can be used to display and set: vibration mode, intermittent vibration, interval time, vibration direction, vibration intensity, screen adjustment, feed speed, etc.

[0109] The infrared sensor section uses an Attorneyson visible red light M12 through-beam photoelectric sensor (CH1, CH2), and the detection signal output port of the photoelectric sensor is connected to PE12 through resistor R1.

[0110] CH1 and CH2 are one of the four sets of through-beam photoelectric sensors. Figure 15 As shown.

[0111] CH1, CH3, CH5, and CH7 are transmitting heads, and CH2, CH4, CH6, and CH8 are receiving heads. An infrared beam is used, installed on conveyor belt 31. The transmitting head can be installed on the left side of conveyor belt 31, and the receiving head on the right side. When the conveyor belt 31 carries grain and passes through the area of ​​infrared sensor 32, the grain blocks the infrared light, and the receiving head cannot receive the infrared light. Pin 2 of the receiving head will then go low.

[0112] When there is no grain on conveyor belt 31, pins 2 of the four photoelectric receivers are at a low level.

[0113] When the grain pile height on conveyor belt 31 is 4 cm, pin 2 of CH2 is at a low level because only the infrared light of CH2 is blocked.

[0114] When the grain pile height on conveyor belt 31 is 8 cm, the infrared light of CH2 and CH4 is blocked, and pins 2 of CH2 and CH4 are at low level.

[0115] When the grain pile height on conveyor belt 31 is 12 cm, the infrared light of CH2, CH4, and CH6 is blocked, and pins 2 of CH2, CH4, and CH6 are at low voltage.

[0116] When the grain pile height on conveyor belt 31 is 16 cm or more, the infrared light of CH2, CH4, CH6, and CH8 is blocked, and pins 2 of CH2, CH4, CH6, and CH8 are at low voltage.

[0117] U14 can determine the current grain accumulation height on conveyor belt 31 by detecting the four pins PE12, PF10, PF11, and PE15.

[0118] The infrared sensor section can prevent grain from accumulating or even overflowing at the feed inlet of the screening machine. By detecting the values ​​of PE12, PF10, PF11, and PE15, it controls the speed of the conveyor belt 31 and the amount of grain accumulating on the conveyor belt 31, and realizes automatic shutdown of the conveyor belt 31 when there is no grain on the conveyor belt 31 (it can be set that if no grain passes through the infrared sensor 32 for 10 minutes, it means that all the grain has been screened).

[0119] The electric actuator drive section uses an NPN transistor Q3. The base of Q3 is connected to PE0 through resistor R2, the emitter of Q3 is connected to GND, the collector of Q3 is connected to pin 7 of MY2NJ relay K1, pins 8 and 3 of K1 are connected to +12V, pin 6 of K1 is connected to GND, and pins 2 and 5 of K1 are connected to the electric actuator control port P2.

[0120] The base of NPN transistor Q24 is connected to PE1 through resistor R3, the emitter of Q24 is connected to GND, the collector of Q24 is connected to pin 7 of MY2NJ relay K2, pins 6 and 8 of K2 are connected to +12V, pin 3 of K2 is connected to GND, and pins 2 and 5 of K2 are connected to the electric actuator control port P2.

[0121] The electric actuator drive unit is used to control the extension and retraction of the electric actuator.

[0122] When the push rod extends, PE0 is at a high level, Q3 is turned on, and relay K1 is energized. Pin 3 of K1 is connected to pin 2 of motor P2 through pin 2 of K1, and pin 2 of P2 is positive. After passing through the motor, it returns to pin 5 of K1 through pin 1 of P2, and then connects to pin 6 of K1 to GND through pin 5 of K1.

[0123] Because PE1 is low, pins 3 and 6 of K2 are not connected to pins 2 and 3 of K2. When PE0 is low and PE1 is high, pins 6 and 3 of K1 are not connected to pins 5 and 2 of K1. Pins 3 and 6 of K2 are connected to pins 2 and 5 of K2 respectively. The +12V is connected through pin 6 of K2 to pin 5 of K2, then to pin 1 of P2, through P2 to pin 2 of P2, then to pin 2 of K2, and finally to pin 3 of K2 to GND. This achieves the following: when PE1 is high and PE0 is low, pin 1 of P2 is +12V and pin 2 of P2 is GND; when PE1 is low and PE0 is high, pin 2 of P2 is +12V and pin 1 of P2 is GND, thus realizing the extension and retraction of the push rod.

[0124] K1, K2, Q3, and Q24 are the drive components of one of the electric linear actuators; there are four in total. Figure 16 As shown.

[0125] The control section of the guide rail motor 24 uses an NPN transistor Q14. The base of Q14 is connected to PE8 through a resistor R28, the emitter of Q14 is connected to GND, and the collector of Q14 is connected to the coil terminal of relay RL1. The controlled switch RL1 is connected to the control port P6 of the guide rail motor 24.

[0126] The main control unit controls the state of the controlled switch RL1 by controlling the base of Q14, and thus controls the working state of the guide rail motor 24.

[0127] The amount of grain being transported is detected by infrared. When there is a large amount of grain being discharged, the guide rail motor 24 is controlled by PE8 and PE9 to reduce the size of the grain outlet 26 and slow down the grain discharge speed.

[0128] U14 controls the grain outlet control module 34 (controlled by the guide rail motor 24) and the speed of the conveyor belt 31 (controlled by the conveyor belt drive motor 35). Infrared sensors detect the amount of grain accumulated on the conveyor belt 31, and the speed of the conveyor belt 31 is controlled based on this accumulation. When the accumulation is large, the speed of the conveyor belt 31 can be reduced and the size of the discharge outlet decreased (controlled by the grain outlet control module).

[0129] Q14 and RL1 are the control components for one of the guide rail motors 24; there are two in total. Figure 17 As shown.

[0130] The fan drive section uses an NPN transistor Q7. The base of Q7 is connected to PE10 through resistor R26, the emitter of Q7 is connected to GND, the collector of Q7 is connected to port B of the JQX-38F relay, port A of the JQX-38F relay is connected to +12V, pin 2 of the JQX-38F relay is connected to W-IN, and pins 3 and 6 of the JQX-38F relay are connected to the fan control port P8.

[0131] The main control unit controls pins 3 and 6 of the JQX-38F relay by controlling the base of Q17, thereby controlling the working state of the fan 4.

[0132] When grain reaches the upper screen assembly 11 through the feed inlet of frame 9, the vibrating motor performs screening, and the blower 4 is turned on via PE10. It can be set that the blower 4 starts when the vibrating motor starts working and stops working when the vibrating motor stops working.

[0133] The vibration motor control section includes an NPN transistor Q18. The base of Q18 is connected to PF0 through a resistor R48, the emitter of Q18 is connected to GND, and the collector of Q18 is connected to the coil terminal KM1A of relay KM1.

[0134] The base of NPN transistor Q19 is connected to PF2 through resistor R49, the emitter of Q19 is connected to GND, and the collector of Q19 is connected to the coil terminal KM2A of relay KM2.

[0135] The base of NPN transistor Q22 is connected to PF1 through resistor R61, the emitter of Q22 is connected to GND, and the collector of Q22 is connected to the coil terminal KM3A of relay KM3.

[0136] The base of NPN transistor Q23 is connected to PF3 through resistor R62, the emitter of Q23 is connected to GND, and the collector of Q23 is connected to the coil terminal KM4A of relay KM4.

[0137] Pin 2 of SLMI350DB module U5 is connected to PF4. Pin 6 of U5 is connected to A_2 and the gate of IXFH16N90 transistor Q16 through resistor R44. The source of Q16 is connected to the source of IXFH16N90 transistor Q17, pin 5 of U5, and pin 1 of HKC20P5 module QU1. The drain of Q16 is connected to the drain of Q17, one end of controlled switch KM2B of KM2, and one end of controlled switch KM4B of KM4. The other end of KM2B is connected to one end of the power port P9 of the vibration motor and one end of controlled switch KM1B of KM1. The other end of KM4B is connected to the other end of P9 and one end of controlled switch KM3B of KM3. The other end of KM3B is connected to the other end of KM1B and VCC-P.

[0138] Pin 2 of QU1 is connected to GND-P. Pin 5 of QU1 is connected to pin 3 of LM331S5 chip U8 through resistor R50. Pin 4 of U8 is connected to pin 3 of MAX11158 chip U9. Pins 6 to 9 of U9 are connected to PB12 to PB15 respectively.

[0139] Q18, Q19, Q22, Q23, U5, QU1, U8, and U9 are the control components of one of the vibration motors; there are two in total. Figure 19 As shown.

[0140] QU1 uses an ADC chip (LM331S5 chip U8) and a high cutoff frequency (the required cutoff frequency of 960HZ is obtained by setting the parameters of 270R resistor R50 and 0.63uF / 50V capacitor C33) to accommodate the rapidly changing current values ​​here.

[0141] By using current acquisition (the output values ​​of U8 and U12 are current acquisition values) and voltage acquisition (does this mean that the output value of QU2 is voltage acquisition value), the power of the vibration motor is obtained, and the duty cycle of Q1 is adjusted to control the actual power of the vibration motor and thus control the vibration intensity.

[0142] U8 and U12 filter the signals acquired by the Hall current transformer to reduce high-frequency interference.

[0143] KM1B~KM4B control the rotation direction and opening / closing of the vibration motor, while Q16 and Q17 control the power of the vibration motor.

[0144] The screen allows you to set whether the upper vibration motor 13 and the lower vibration motor 16 vibrate simultaneously or alternately, as well as the vibration intensity of each motor.

[0145] U5 is a MOSFET driver chip.

[0146] KM1 and KM4 form one group, and KM2 and KM3 form another group. By controlling the two groups of relays, the positive and negative terminals of the power supply port P9 of the vibration motor can be switched, thereby controlling the rotation direction of the vibration motor and whether the vibration motor is working.

[0147] The directions of the combined vibration force are different when the vibratory motor rotates forward and in reverse.

[0148] This provides a stronger vibration effect and is more in line with the principle of manual sieving, resulting in better performance.

[0149] Connecting Q16 and Q17 in parallel increases the control current.

[0150] The control part of the conveyor belt drive motor 35 includes a B1215S-3WR2 module U22, with pins 3 and 4 of U22 connected to AQS1 and V1 respectively.

[0151] The anode of the OP13 input terminal of the EL357 chip is connected to PB0, the cathode of the OP13 input terminal is connected to GND, the collector of the OP13 output terminal is connected to V1, and the emitter of the OP13 output terminal is connected to AQG1 through resistor R84.

[0152] U_IN is connected to the cathode of diode D19 and the drain of NCEP60T12AK transistor Q9, respectively. The anode of D19 is connected to AQS1 and the source of NCEP60T12AK transistor Q8, respectively. The gate of Q8 is connected to AQG1, the gate of Q9 is connected to AQG2, the source of Q9 is connected to AQS2 and the anode of diode D20, respectively. The cathode of D20 is connected to A_OUT, the drain of Q8, and the power supply port P19 of the conveyor belt drive motor 35, respectively.

[0153] The anode of the U6 input terminal of the PC817 chip is connected to one end of resistor R41 and the cathode of the U7 input terminal of the PC817 chip, respectively. The other end of R41 is connected to U_IN through resistor R40. The cathode of the U6 input terminal is connected to one end of resistor R43 and the anode of the U7 input terminal, respectively. The other end of R43 is connected to N through resistor R42.

[0154] like Figure 21 As shown, P19 is the power supply port of the three-phase conveyor belt drive motor 35. Optocouplers U6, U7, U37, U38, U39, and U40 are used to detect the zero-crossing point of the three-phase power. When the voltage of a certain phase line is at zero, the optocoupler on the corresponding branch is not conducting; when the voltage of that phase line slowly rises from zero, the optocoupler on the corresponding branch conducts, and the corresponding output pin is at a high level. U14 will detect the zero-crossing signal of that phase.

[0155] Let's take phase U_IN as an example. Alternating current exists, with both forward and reverse currents. Each channel has two optocouplers, U6 and U7. During the positive half-cycle of U_IN, U_IN flows through R40 and R41 to U6, and through R42 and R43 to N; because U6 is conducting, PB7 outputs high. When U_IN is at zero, no current flows through U6 and U7, and PB7 and PD14 have no output. During the negative half-cycle of U_IN, N flows through R42 and R43 to U7, and through R41 and R40 to U_IN. U7 conducts, PD14 is high, and PB7 is low.

[0156] Q9, Q11, and Q13 are used to control the resistance connected in series with the conveyor belt drive motor 35. By changing the resistance, the speed of the conveyor belt drive motor 35 is changed. Taking phase U as an example, the same applies to phases V and W. When phase U is in its positive half-cycle, the zero-crossing point of U is detected by the zero-crossing circuit above. This zero-crossing point is then controlled by U14 to adjust the duty cycle of the field-effect transistor AQG2 (Q9), thus controlling the gate voltage of Q9. This causes the transistor to operate in the variable resistance region. By adjusting the duty cycle, the equivalent resistance of the transistor in the variable resistance region can be changed, thereby adjusting the resistance of the resistor connected in series with the conveyor belt drive motor 35 (this resistor is the simulated resistance used to control Q8 and Q9 to operate in the variable resistance region), and thus changing the speed of the conveyor belt drive motor 35.

[0157] Diode D20 prevents current from flowing through the body diode inside Q9 during the negative half-cycle. Because Q9 is conducting, it is impossible to use Q8 to control the rotation speed using an analog resistor.

[0158] The function of AQS2 is to control the analog resistance value of Q9 when it operates in the variable resistance region.

[0159] When phase U is in the negative half-cycle, Q8 is driven into the adjustable resistor region in the same way for control.

[0160] By detecting the zero-crossing point, it is determined whether it is a positive or negative half-cycle, which transistor should be turned on, whether it is Q8 or Q9, and the duty cycle controls the value of the resistor connected in series with the motor to adjust the speed of the motor.

[0161] U22 and OP13 are the drive circuit and isolation power supply. Because the PB0 of U14 is used to drive the gate AQS1 of the three-phase field-effect transistor Q9 to achieve the condition of entering the variable resistance region, a 0V~15V voltage isolated from others needs to be established between the gate and source of Q9. An isolation power supply is used for drive control.

[0162] The MOS transistor requires 15V between the gate and source to conduct. Since the source is not directly connected to GND, an isolated power supply is needed to apply voltage between the gate and source to reach 15V. The isolation is also to protect U14, since the source is connected to a 380V high voltage.

[0163] U22 is the power supply module. Pins 1 and 2 of U22 are inputs, and pins 3 and 4 are outputs. The negative terminal of the power supply is connected to the source of Q8. The gate of Q8 is connected to the positive terminal of the power supply via an optocoupler, controlled by PB0 of U14. PB0 of U14 controls the resistance value of Q8 in the adjustable resistor region.

[0164] The working process of this utility model will be described below with reference to the accompanying drawings.

[0165] like Figure 8 As shown, firstly, the grain in the grain bin 33 flows towards the bottom grain bin outlet 26 under the action of gravity. At this time, the grain outlet control module 34 starts to work. The guide rail motor 24 drives the lead screw 29, which drives the slider 28 on the guide rail 30 to move, thereby changing the area of ​​the grain bin outlet 26 that is blocked by the grain outlet control plate 25. This precisely controls the flow rate of grain from the grain bin 33, so that the grain falls evenly onto the conveyor belt 31 below.

[0166] Next, the grain falling onto the conveyor belt 31 is moved towards the screening machine (i.e., the aforementioned agricultural product impurity cleaning equipment) by the power of the conveyor belt drive motor 35. The strip-shaped protrusions 36 on the surface of the conveyor belt 31 effectively prevent the grain from sliding down due to gravity, ensuring the stability of grain transportation. During transportation, four pairs of infrared sensors 32 on both sides of the conveyor belt 31 continuously monitor the total amount of grain. Once too much grain is detected, the speed of the conveyor belt 31 will be automatically adjusted to control the instantaneous flow rate of grain entering the screening machine, avoiding adverse effects on the screening efficiency of the screening machine due to excessive feed.

[0167] Finally, the grain is conveyed into the screening machine. It first reaches the upper screen assembly 11, where it begins screening under the vibration of the upper vibrating motor 13, separating larger particles of impurities. The screened grain falls onto the baffle plate 7. Subsequently, the grain falls along the baffle plate 7 by gravity to the lower screen assembly 12, where the lower vibrating motor 16 also operates, performing a secondary screening to remove smaller diameter impurities. After screening by the upper and lower screen assemblies 12, the qualified grain falls into the discharge trough 10 and is collected, while the small impurities that were screened out fall from the discharge port into the discharge collection box.

[0168] During the screening process, if the screen becomes clogged, the position of the upper screen can be changed by controlling the electric push rod, thereby adjusting the aperture size between the upper and lower screens to clear the clogged screen. At the same time, the cyclone separator 2 on one side of the screening machine, with the air force provided by the fan 4, collects the dust generated inside the screening machine, keeping the screening environment clean and avoiding dust pollution.

[0169] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. An agricultural product impurity cleaning device, comprising a frame (9), wherein a feed inlet for the frame (9) is provided at the upper end of the frame (9), characterized in that... An inclined upper screen assembly (11) is provided in the upper part of the frame (9), and an inclined lower screen assembly (12) is provided in the frame (9) below the upper screen assembly (11); the high end of the upper screen assembly (11) is located below the feed inlet of the frame (9), and the high end of the lower screen assembly (12) is located below the low end of the upper screen assembly (11); a lower discharge port is provided on the frame (9) corresponding to the low end of the lower screen assembly (12); an upper discharge port is provided on the frame (9) corresponding to the low end of the upper screen assembly (11); An upper vibration motor (13) for driving the upper screen assembly (11) to vibrate is provided on the frame (9). A baffle plate (7) with the same inclination direction as the upper screen assembly (11) is provided in the frame (9) below the upper screen assembly (11) and above the lower screen assembly (12). The lower end of the baffle plate (7) is the discharge end of the baffle plate (7), and the discharge end of the baffle plate (7) is located above the upper end of the lower screen assembly (12). A lower vibration motor (16) for driving the vibration of the lower screen assembly (12) is provided on the frame (9). A discharge trough plate (10) with the same inclination direction as the lower screen assembly (12) is provided in the frame (9) below the lower screen assembly (12). A discharge port of the frame (9) is provided on the frame (9) at the lower end of the discharge trough plate (10).

2. The agricultural product impurity cleaning equipment according to claim 1, characterized in that... The upper screen assembly (11) includes an upper screen and a lower screen, and the frame (9) is provided with an upper screen drive device for changing the relative position of the upper screen and the lower screen. The lower screen assembly (12) includes an upper lower screen (22) and a lower lower screen (23). The frame (9) is provided with a lower screen drive device for changing the relative position of the upper lower screen (22) and the lower lower screen (23).

3. The agricultural product impurity cleaning equipment according to claim 2, characterized in that... The upper screen drive device includes an upper X-axis electric push rod (20) and an upper Y-axis electric push rod (19). The upper X-axis electric push rod (20) is mounted on the frame (9) at the lower end of the upper screen assembly (11). The inclination direction of the upper X-axis electric push rod (20) is consistent with the inclination direction of the upper screen assembly (11). The outer end of the upper X-axis electric push rod (20) abuts against the lower end of the upper screen. An upper X-axis L-shaped hook is provided at the outer end of the upper X-axis electric push rod (20), and the lower end frame of the upper screen rests inside the upper X-axis L-shaped hook. The upper Y-axis electric push rod (19) is mounted on the frame (9) on the side of the upper screen assembly (11). The outer end of the upper Y-axis electric push rod (19) abuts against the side end of the upper screen. An upper Y-axis L-shaped hook is provided at the outer end of the upper Y-axis electric push rod (19), and the side frame of the upper screen rests inside the upper Y-axis L-shaped hook. The lower screen drive device includes a lower X-axis electric push rod (17) and a lower Y-axis electric push rod (18). The lower X-axis electric push rod (17) is mounted on the frame (9) at the lower end of the lower screen assembly (12). The inclination direction of the lower X-axis electric push rod (17) is consistent with the inclination direction of the lower screen assembly (12). The outer end of the lower X-axis electric push rod (17) abuts against the lower end of the upper lower screen (22). The outer end of the lower X-axis electric push rod (17) is provided with There is a lower X-direction L-shaped hook, and the lower frame of the upper lower screen (22) is located inside the lower X-direction L-shaped hook; the lower Y-direction electric push rod (18) is set on the frame (9) on the side of the lower screen assembly (12), and the outer end of the lower Y-direction electric push rod (18) abuts against the side end of the upper lower screen (22); the outer end of the lower Y-direction electric push rod (18) is provided with a lower Y-direction L-shaped hook (21), and the side frame of the upper lower screen (22) is located inside the lower Y-direction L-shaped hook (21).

4. The agricultural product impurity cleaning equipment according to claim 1, characterized in that... An upper waste discharge plate (15) is provided at the upper waste discharge port. The upper waste discharge plate (15) is inclined in the same direction as the upper screen assembly (11). The upper end of the upper waste discharge plate (15) is connected to the frame (9) by fasteners, and the lower end of the upper waste discharge plate (15) is located outside the frame (9). An upper waste discharge collection box is provided below the lower end of the upper waste discharge plate (15). A lower waste plate (3) is provided at the lower waste outlet. The lower waste plate (3) is inclined in the same direction as the lower screen assembly (12). The upper end of the lower waste plate (3) is connected to the frame (9) by fasteners. The lower end of the lower waste plate (3) is located outside the frame (9). A lower waste collection box is provided below the lower end of the lower waste plate (3).

5. The agricultural product impurity cleaning equipment according to claim 1, characterized in that... An exhaust port is provided on the frame (9) below the high end of the baffle plate (7). The exhaust port is connected to the inlet of the fan (4) through the exhaust pipe (14). The outlet of the fan (4) is connected to the upper inlet of the cyclone separator (2). A ash storage bin (1) is provided at the lower outlet of the cyclone separator (2). An air inlet is provided at the upper end of the frame (9), and an air cap (6) is provided at the air inlet.

6. The agricultural product impurity cleaning equipment according to claim 1, characterized in that... A conveyor belt (31) is installed below the grain silo outlet (26). The feed end of the conveyor belt (31) is located below the grain silo outlet (26), and the discharge end of the conveyor belt (31) is located above the feed inlet of the frame (9). A grain outlet control module (34) is installed at the grain silo outlet (26).

7. The agricultural product impurity cleaning equipment according to claim 6, characterized in that... The grain outlet control module (34) includes a guide rail motor (24). The output shaft of the guide rail motor (24) is connected to the lead screw (29) through a coupling (27). The lead screw (29) rotates through the threaded hole on the slider (28). The slider (28) is set on the guide rail (30). The grain outlet control plate (25) is set on the slider (28).

8. The agricultural product impurity cleaning equipment according to claim 6, characterized in that... The conveyor belt (31) is equipped with an infrared sensor (32) for monitoring the amount of grain transported.

9. The agricultural product impurity cleaning equipment according to claim 6, characterized in that... The conveyor belt (31) includes a front horizontal conveyor belt and a rear inclined conveyor belt. The feed end of the horizontal conveyor belt is located below the grain bin discharge port (26). The lower end of the inclined conveyor belt is the docking end with the horizontal conveyor belt, and the upper end of the inclined conveyor belt is the discharge end of the conveyor belt (31).

10. The agricultural product impurity cleaning equipment according to claim 1, characterized in that... The control signal input port of the power supply section of the vibration motor, the control signal input port of the control section of the vibration motor, and the control signal output port of the main control section are connected. The control signal output port of the main control section is connected to the control signal input port of the control section of the conveyor belt drive motor (35), the control signal input port of the electric push rod drive section, the control signal input port of the control section of the guide rail motor (24), the control signal input port of the fan drive section, and the control signal input port of the control section of the conveyor belt drive motor (35). The power output ports of the power supply section are connected to the power supply ports of the vibration motor power supply section, the main control section, the infrared sensor section, the electric push rod drive section, the guide rail motor (24) control section, the fan drive section, the vibration motor control section, and the conveyor belt drive motor (35) control section, respectively. The detection signal output port of the infrared sensor is connected to the detection signal input port of the main control unit.

Images