A sorting device for bulk grain sampling samples

Abstract

The application discloses a kind of sorting devices of bulk grain sampling sample, it is related to bulk grain detection field, including sorting frame, the top end of the sorting frame is equipped with baffle by bolt, one side of the sorting frame is fixedly connected with discharge port, the inside one side of the sorting frame is hingedly connected with first sieve plate, and the other side of the sorting frame inside is hingedly connected with second sieve plate, the bottom end of the sorting frame is fixedly connected with vibration motor on both sides, and one end of the sorting frame is provided with residual grain groove.The sorting device of bulk grain sampling sample, part of dust and residual grain with lighter weight will be shaken to the air by vibration motor, the residual grain and dust can be blown in the fixed box by fan, so as to blow residual grain and dust to the inside of residual grain groove, the dust and part of residual grain can be collected by residual grain groove, and the impurities in bulk grain can be removed better, to ensure the quality of bulk grain.

Description

Technical Field

[0001] This invention relates to the field of bulk grain detection technology, specifically to a sorting device for bulk grain samples. Background Technology

[0002] The sorting machine can screen bulk grains, making the sampling process easier. At the same time, the sorting machine can shake the bulk grains quickly during the screening process, allowing for faster and more stable screening.

[0003] In the prior art, Chinese Patent No. CN220032249U discloses a device for sampling, sorting, and retaining samples during the loading, unloading, and transportation of bulk grain. The device includes a fixed frame, a conveyor belt movably fitted onto the inner wall of the fixed frame, a bulk grain frame fixedly mounted at the bottom of the inner wall of the fixed frame, a grain suction nozzle fixedly mounted onto the inner wall of the fixed frame, and a split-type explosion-proof grain suction device fixedly mounted at the top of the fixed frame. The inlet of the split-type explosion-proof grain suction device is connected to the outlet of the grain suction nozzle via a connecting pipe, and a first discharge pipe is fixedly fitted onto the outlet of the split-type explosion-proof grain suction device. This device maintains coverage and representativeness while reducing the total sample volume; sampling is conducted along the main bulk grain conveying channel, integrated into the logistics process without bypass facilities; the collected samples can be screened, sorted, and tested, and various characteristic samples can be classified, packaged, and measured; the batch and sampling sequence number of each sample are marked in real time for traceability.

[0004] The aforementioned institutions reduce the total sample size and achieve testing by screening and sorting bulk grains. However, in actual use, since there are some residual grains and broken pieces inside the bulk grains, screening them together will increase the number of residual grains inside the sample and affect the quality of the sample.

[0005] In the prior art, Chinese Patent No. CN207170251U discloses a grain sorting machine, including a frame and a feed box, a primary sorting section, a secondary sorting section, and a tertiary sorting section mounted on the frame. Grain enters the sorting machine from the feed box. In the primary sorting section, smaller impurities are blown out. Subsequently, the grain enters the secondary sorting section, where smaller impurities are further separated under vibration and airflow. Finally, the grain enters the tertiary sorting section, where larger particles and larger-than-large particles are separated from the grain. Ultimately, the impurities and grain are discharged separately, achieving grain sorting. The structure is simple and easy to implement; the three-stage screening achieves thorough separation of grain and impurities, resulting in good screening effect and a high level of cleanliness in the screening workshop.

[0006] The aforementioned mechanism achieves fine selection by separating impurities from loose grains. However, in actual use, some dust particles remain inside the device after air separation, causing the device to become dirty. Summary of the Invention

[0007] The purpose of this invention is to provide a sorting device for bulk grain samples, in order to solve the problem mentioned in the background art that the number of residual grains inside the bulk grain increases when it is screened together, thus affecting the sample quality.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a sorting device for bulk grain samples, comprising a sorting frame, a baffle plate bolted to the top of the sorting frame, a discharge port fixedly connected to one side of the sorting frame, a first sieve plate engaged with one side of the inside of the sorting frame, and a second sieve plate engaged with the other side of the inside of the sorting frame, vibrating motors fixedly connected to both sides of the bottom of the sorting frame, and a residue trough provided at one end of the sorting frame; an air classifier fixedly connected to one side of the top of the sorting frame, and a feed inlet provided on one side of the top of the air classifier, a valve provided at the top of the air classifier on the side of the feed inlet, a second fan fixedly connected to the lower end of one side of the air classifier, and the output end of the second fan extending into the interior of the air classifier, a screening groove provided on one side of the air classifier, a grain inlet channel provided at the bottom of the air classifier, a third sieve plate engaged with one side of the bottom of the feed inlet, and a screening outlet channel installed at the bottom of the feed inlet below the third sieve plate.

[0009] Furthermore, a fixed box is fixedly connected to one side of one end of the sorting frame, and an air separation mechanism for separating impurities from bulk grain is provided inside the fixed box. The air separation mechanism includes a perforated plate, and the perforated plate is fixedly connected to one end of the fixed box. A first fan is fixedly connected to one end of the perforated plate, and an air duct is fixedly connected to one end inside the fixed box.

[0010] Furthermore, one end of the air duct extends into the interior of the sorting rack, and the first fan is located at one end of the air duct.

[0011] Furthermore, a material anti-accumulation mechanism is provided between the two ends inside the sorting frame. The material anti-accumulation mechanism includes a deflector plate, and the deflector plate is rotatably connected to one side between the two ends of the sorting frame. A fan blade is fixedly connected to one end of the deflector plate, and the fan blade is located at one end of the air duct.

[0012] Furthermore, the interior of the residual particle trough is equipped with a cleaning mechanism for processing impurities. The cleaning mechanism includes a bidirectional threaded rod, which is connected to a toggle plate via a pulley. A movable block is threadedly connected to the outer side of the bidirectional threaded rod, and a fixed box is fixedly connected to the bottom end of the movable block. A cleaning brush is fixedly connected inside the fixed box via a connecting spring.

[0013] Furthermore, the fixing box and the residue trough are slidably connected, and the bottom end of the cleaning brush is in contact with the bottom end of the residue trough.

[0014] Furthermore, mounting blocks are fixedly connected to both ends of the first and second sieve plates, and mounting boxes are provided at both ends of the sorting frame. The mounting boxes contain mounting mechanisms for limiting the mounting blocks. These mechanisms include airbags, which are fixedly connected to the bottom of the mounting box. A sliding plate is fixedly connected to the top of the airbag, and the sliding plate is slidably connected to the mounting box. Fixed rods are fixedly connected to the middle positions of both sides of the mounting box, and limit rods are slidably connected to the inside of the fixed rods via pistons. Limiting grooves matching the limit rods are provided on both sides of the mounting blocks. The fixed rods are connected to the airbag via flexible hoses. Return springs are fixedly connected to both sides of the bottom of the sliding plate, and the bottom of the mounting box is connected to the bottom of the return springs.

[0015] Furthermore, conductive sheets are fixedly connected to one side of the limiting rod and one side inside the fixing rod, and the positions of the conductive sheets correspond to each other.

[0016] Furthermore, a fixing groove is provided at one end of the fixing rod, and a toggle block is slidably connected inside the fixing groove, the toggle block being connected to the limiting rod.

[0017] 1. Some lighter dust and particles are shaken into the air by the vibrating motor. The first fan inside the fixed box blows these particles and dust into the particle trough, where they are collected. The main function of the vibrating motor is to vibrate and transport the bulk grain, assisting in the screening of the bulk grain. At the same time, the vibrating motor itself is low in noise, avoiding excessive noise from affecting the physical condition of the workers. The screening trough can screen out large particles of impurities from the inside of the air classifier box, while small particles of impurities are screened out by the third screen plate when they enter the air classifier box through the feed inlet.

[0018] Furthermore, when it is necessary to screen other different types of bulk grains and impurities, the first screen plate, the second screen plate, and the third screen plate can be disassembled and replaced. At the same time, when the second fan is performing air separation on different types of bulk grains, it can also adjust its own air volume so that the air force can better separate different types of bulk grains and avoid air separation deviation caused by excessive or insufficient air force.

[0019] Furthermore, during the air separation process using the first blower, the air duct inside the fixed box can concentrate the air, preventing the air from being too scattered and weak, which would make stable screening difficult. Concentrating the air through the air duct stabilizes the airflow, making the screening of impurities in the bulk grain more convenient.

[0020] Furthermore, during the blowing process of the first blower, the air gathered by the air duct will also blow the fan blades, causing the fan blades and the agitator plate to rotate. This will rotate and agitate the bulk grain piled up at the feed inlet, allowing the bulk grain to enter the sorting rack more quickly and undergo subsequent multiple sorting, reducing the residue and impurities inside the bulk grain. As the agitator plate rotates continuously, it can drive the double-threaded rod to rotate through the pulley. During the rotation of the double-threaded rod, it will drive the movable block to move left and right, causing the fixed box below the movable block to move left and right inside the residue trough, thereby cleaning the remaining residue and dust inside the residue trough.

[0021] 2. The first and second sieve plates are connected by the mounting block. By inserting the mounting block into the installation box, the force of the mounting block pressing on the sliding plate causes the airbag under the sliding plate to be stressed and the gas to be delivered to the inside of the fixing rod through the hose. This causes the limiting rod inside the fixing rod to be pushed out by the gas, and at the same time, the limiting rod engages with the limiting grooves on both sides of the outside of the mounting block, thereby realizing the installation of the first and second sieve plates. The convenient disassembly and assembly can increase the flexibility when replacing the first and second sieve plates.

[0022] Furthermore, if the engagement between the limiting rod and the limiting groove is not secure enough, the return spring will reset, causing the gas inside the fixed rod to be transported back into the airbag. This will cause the conductive plate on one side of the limiting rod to contact the conductive plate inside the fixed rod. Once the conductive plates contact, an alarm will be triggered, reminding the staff to check the installation of the first and second screen plates to prevent them from falling off during operation. Attached Figure Description

[0023] Figure 1 This is a front view structural diagram of the present invention;

[0024] Figure 2 This is a cross-sectional structural schematic diagram of the air separation mechanism of the present invention;

[0025] Figure 3 This is a schematic diagram of the sorting rack structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the connection structure between the first sieve plate and the second sieve plate of the present invention.

[0027] Figure 5 This is a front view structural diagram of the present invention;

[0028] Figure 6 This is a schematic diagram of the frontal cross-sectional structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the air separation mechanism of the present invention;

[0030] Figure 8 This is a schematic diagram of the connection structure between the air duct and the fan of the present invention;

[0031] Figure 9 This is a schematic diagram of the material anti-accumulation mechanism of the present invention;

[0032] Figure 10 This is a schematic diagram of the cleaning mechanism of the present invention;

[0033] Figure 11 This is a cross-sectional structural schematic diagram of the sieve plate mounting mechanism of the present invention;

[0034] Figure 12 This is an exploded view of the limiting mechanism of the present invention;

[0035] Figure 13 This is a schematic diagram of the installation mechanism of the present invention;

[0036] Figure 14 This is an enlarged structural schematic diagram of the limiting block of the present invention.

[0037] In the diagram: 1. Sorting frame; 2. Baffle plate; 3. Vibration motor; 4. Discharge port; 5. First screen plate; 6. Second screen plate; 7. Fixing box; 8. Perforated plate; 9. First fan; 10. Air duct; 11. Actuating plate; 12. Fan blade; 13. Bidirectional threaded rod; 14. Movable block; 15. Fixing box; 16. Connecting spring; 17. Cleaning brush; 18. Mounting box; 19. Airbag; 20. Return spring; 21. Sliding plate; 22. Mounting block; 23. Limiting rod; 24. Limiting groove; 25. Conductive sheet; 26. Fixing rod; 27. Actuating block; 28. Fixing groove; 29. ​​Residual grain trough; 30. Valve; 31. Second fan; 32. Air separator box; 33. Screening trough; 34. Third screen plate; 35. Screening channel; 36. Grain inlet channel; 37. Feed port. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1:

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The technical solution shown addresses the problem of residual grains being mixed inside the sample during bulk grain sampling. The bulk grain sampling sample sorting device discloses an air separation mechanism, including a sorting frame 1. A baffle plate 2 is bolted to the top of the sorting frame 1. A discharge port 4 is fixedly connected to one side of the sorting frame 1. A first screen plate 5 is engaged with one side inside the sorting frame 1, and a second screen plate 6 is engaged with the other side inside the sorting frame 1. Vibration motors 3 are fixedly connected to both sides of the bottom of the sorting frame 1. A residual grain trough 29 is provided at one end of the sorting frame 1. An air classifier 32 is fixedly connected to one side of the top, and a feed inlet 37 is provided on one side of the top of the air classifier 32. A valve 30 is provided on the top of the air classifier 32 on the side of the feed inlet 37. A second fan 31 is fixedly connected to the lower end of one side of the air classifier 32, and the output end of the second fan 31 extends into the interior of the air classifier 32. A screening groove 33 is provided on one side of the air classifier 32. A grain inlet channel 36 is provided at the bottom of the air classifier 32. A third screen plate 34 is engaged and connected to one side of the bottom of the feed inlet 37. A screening channel 35 is installed at the bottom of the feed inlet 37 below the third screen plate 34.

[0041] In this example, bulk grain enters the sorting device through the feed inlet 37. The amount of bulk grain entering is controlled by the valve 30. The vibrating motor 3 shakes the grain and sends it into the air separator 32. The second fan 31 blows air and performs preliminary screening. The main function of the vibrating motor 3 is to vibrate and transport the bulk grain, assisting in the screening. At the same time, the vibrating motor 3 has low noise, avoiding excessive noise from affecting the physical condition of the workers. The screening trough 33 can screen out impurities with a diameter of 8mm or more from the air separator 32. Impurities with a diameter of less than 3mm are screened out through the third screen plate 34 when they enter the air separator 32 through the feed inlet 37. The vibrating motor 3 performs preliminary screening, and the impurities with a diameter of less than 3mm are screened out and discharged through the screening channel 35.

[0042] The remaining bulk grains enter different channels through the grain inlet channel 36. Some lighter impurities that do not meet the diameter requirements enter the residue trough 29 through the grain inlet channel 36 for screening. Most of the remaining bulk grains enter the interior of the sorting rack 1 for secondary screening. The internal channels can be used to screen the bulk grains more stably and prevent impurities from entering during the screening process.

[0043] Bulk grains are fed into the sorting rack 1 through a section above one side that is not covered by the baffle plate 2. After entering the sorting rack 1, the bulk grains are vibrated by the vibrating motor 3, causing them to pass through the first screen plate 5 and the second screen plate 6 for screening. The first screen plate 5 can screen out half-grains of bulk grains, while the second screen plate 6 can screen out whole grains of bulk grains. This allows bulk grains of different qualities to be discharged from different channels, thus achieving a stable sorting process. Qualified bulk grains are discharged from the sorting rack 1 through the discharge port 4.

[0044] During the initial screening process, there is no baffle 2 at the feed inlet, so some of the lighter dust and residue will be shaken into the air by the vibrating motor 3. The first fan 9 inside the fixed box 7 can blow these residues and dust into the residue trough 29. The residue trough 29 can collect these dust and some residues. The continuous shaking of the vibrating motor 3 will transport these impurities to the discharge port 4 for discharge, so as to avoid impurities affecting the quality of the sorted bulk grain.

[0045] Example 2:

[0046] As shown Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10To address the problem of residual grains remaining inside the sorting rack 1 after screening, this technical solution discloses a material anti-accumulation mechanism for the bulk grain sampling device. A fixed box 7 is fixedly connected to one side of one end of the sorting rack 1, and an air separation mechanism for separating impurities from the bulk grain is installed inside the fixed box 7. The air separation mechanism includes a perforated plate 8, which is fixedly connected to one end of the fixed box 7. A first blower 9 is fixedly connected to one end of the perforated plate 8, and an air duct 10 is fixedly connected to one end of the fixed box 7. One end of the air duct 10 extends into the interior of the sorting rack 1, and the first blower 9 is located at one end of the air duct 10. A material anti-accumulation mechanism is provided between the two ends inside the sorting rack 1. The material anti-accumulation mechanism includes… The device includes a toggle plate 11, which is rotatably connected to one side between the two ends of the sorting frame 1. One end of the toggle plate 11 is fixedly connected to a fan blade 12, which is located at one end of the air duct 10. The interior of the residue trough 29 is equipped with a cleaning mechanism for processing impurities. The cleaning mechanism includes a bidirectional threaded rod 13, which is connected to the toggle plate 11 via a pulley. The outer side of the bidirectional threaded rod 13 is threadedly connected to a movable block 14, and the bottom end of the movable block 14 is fixedly connected to a fixed box 15. The interior of the fixed box 15 is fixedly connected to a cleaning brush 17 via a connecting spring 16. The fixed box 15 and the residue trough 29 are slidably connected, and the bottom end of the cleaning brush 17 is in contact with the bottom end of the residue trough 29.

[0047] In this example, during the blowing process of the first blower 9, the wind gathered by the air duct 10 will also blow the fan blades 12, causing the fan blades 12 and the deflector plate 11 to rotate, thereby rotating and deflecting the bulk grain piled up at the feed point, so that the bulk grain can enter the sorting rack 1 more quickly and undergo subsequent multiple sorting, reducing the residual grains and impurities inside the bulk grain, and also effectively preventing the bulk grain from piling up at the feed point, preventing the bulk grain from falling off during vibration after piling up;

[0048] Meanwhile, as the actuating plate 11 rotates continuously, it drives the bidirectional threaded rod 13 to rotate via the pulley. During the rotation, the bidirectional threaded rod 13 drives the movable block 14 to move left and right, causing the fixed box 15 below the movable block 14 to move left and right inside the residue trough 29. This cleans the remaining residue and dust inside the residue trough 29, allowing impurities to fall and be discharged by the vibration force of the vibrating motor 3, effectively reducing the residue of impurities.

[0049] Example 3:

[0050] like Figure 5 , Figure 6 , Figure 11 , Figure 12 , Figure 13 and Figure 14The technical solution shown addresses the problem that different sizes of sieve plates are needed when sampling different bulk grains, but the sieve plates are inconvenient to disassemble and assemble during use, resulting in overall inconvenience. The bulk grain sampling device discloses an installation mechanism. Mounting blocks 22 are fixedly connected to both ends of the first sieve plate 5 and the second sieve plate 6, and mounting boxes 18 are provided at both ends of the sorting frame 1. The mounting boxes 18 contain an installation mechanism for limiting the mounting blocks 22. The installation mechanism includes an airbag 19, which is fixedly connected to the bottom of the mounting box 18. A sliding plate 21 is fixedly connected to the top of the airbag 19, and the sliding plate 21 is slidably connected to the mounting box 18. The mounting boxes 18 have two... A fixing rod 26 is fixedly connected to the middle position of each side, and a limit rod 23 is slidably connected inside the fixing rod 26 via a piston. Limiting grooves 24 matching the limit rods 23 are opened on both sides of the mounting block 22. The fixing rod 26 is connected to the airbag 19 via a hose. Return springs 20 are fixedly connected to both sides of the bottom end of the sliding plate 21, and the bottom end of the mounting box 18 is connected to the bottom end of the return springs 20. Conductive plates 25 are fixedly connected to one side of the limit rod 23 and one side of the inside of the fixing rod 26, and the positions of the conductive plates 25 correspond to each other. A fixing groove 28 is opened at one end of the fixing rod 26, and a toggle block 27 is slidably connected inside the fixing groove 28. The toggle block 27 is connected to the limit rod 23.

[0051] In this example, the mounting block 22 is connected to the first sieve plate 5 and the second sieve plate 6. When the first sieve plate 5 and the second sieve plate 6 need to be installed, the mounting block 22 is inserted into the interior of the mounting box 18, so that the bottom end of the mounting block 22 contacts the sliding plate 21. The force of the mounting block 22 pressing on the sliding plate 21 causes the airbag 19 under the sliding plate 21 to be stressed and the gas is delivered to the interior of the fixing rod 26 through the hose. This causes the limiting rod 23 inside the fixing rod 26 to be pushed out by the gas, and at the same time, the limiting rod 23 engages with the limiting grooves 24 on both sides of the outside of the mounting block 22, thereby realizing the installation of the first sieve plate 5 and the second sieve plate 6.

[0052] After the first screen plate 5 and the second screen plate 6 are installed, the conductive sheet 25 separates. If the engagement between the limiting rod 23 and the limiting groove 24 is not firm enough, the return spring 20 will reset, so that the gas inside the fixing rod 26 will be transported back into the airbag 19, so that the conductive sheet 25 on the side of the limiting rod 23 and the conductive sheet 25 inside the fixing rod 26 come into contact. When the conductive sheet 25 comes into contact, an alarm will be triggered to remind the staff to check the installation of the first screen plate 5 and the second screen plate 6, so as to avoid the problem of the first screen plate 5 and the second screen plate 6 falling off during operation.

[0053] During disassembly, by moving the actuating block 27 to one side, the actuating block 27 slides inside the fixed groove 28. At the same time, the spring on one side of the actuating block 27 is stressed and shortened. The actuating block 27 is connected to the limiting rod 23. During the movement of the actuating block 27, it will drive the limiting rod 23 to one side, thereby separating the limiting rod 23 from the limiting groove 24, realizing the disassembly of the first screen plate 5 and the second screen plate 6. This facilitates the replacement of the size of the first screen plate 5 and the second screen plate 6 according to different needs, thus enabling better sorting of bulk grain.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sorting device for bulk grain samples, characterized in that: The system includes a sorting frame (1), with a baffle plate (2) bolted to the top of the sorting frame (1), a discharge port (4) fixedly connected to one side of the sorting frame (1), a first screen plate (5) snapped to one side inside the sorting frame (1), and a second screen plate (6) snapped to the other side inside the sorting frame (1), and vibration motors (3) fixedly connected to both sides of the bottom end of the sorting frame (1), and a residue trough (29) provided at one end of the sorting frame (1). A wind classifier box (32) is fixedly connected to one side of the top of the sorting rack (1), and a feed inlet (37) is provided on one side of the top of the wind classifier box (32). A valve (30) is provided on the top of the wind classifier box (32) on the side of the feed inlet (37). A second fan (31) is fixedly connected to the lower end of one side of the wind classifier box (32), and the output end of the second fan (31) extends into the interior of the wind classifier box (32). A screening groove (33) is provided on one side of the wind classifier box (32). The bottom end is provided with a grain inlet channel (36), and a third screen plate (34) is engaged and connected to one side of the bottom end of the feed inlet (37). A screening channel (35) is installed at the bottom end of the feed inlet (37) below the third screen plate (34). Both ends of the first screen plate (5) and the second screen plate (6) are fixedly connected with mounting blocks (22), and both ends of the sorting frame (1) are provided with mounting boxes (18). The mounting box (18) is provided with an installation mechanism for limiting the mounting block (22). The installation mechanism includes an airbag (19), which is fixedly connected to the bottom of the installation box (18). A sliding plate (21) is fixedly connected to the top of the airbag (19), and the sliding plate (21) is slidably connected to the installation box (18). A fixing rod (26) is fixedly connected to the middle position on both sides of the installation box (18), and a limit rod (23) is slidably connected to the inside of the fixing rod (26) through a piston. Limiting grooves (24) matching the limit rods (23) are opened on both sides of the installation block (22). The fixing rod (26) is connected to the airbag (19) through a hose. A return spring (20) is fixedly connected to both sides of the bottom of the sliding plate (21), and the bottom of the installation box (18) is connected to the bottom of the return spring (20).

2. The sorting device for bulk grain sampling according to claim 1, characterized in that: One side of the sorting frame (1) is fixedly connected to a fixed box (7), and the fixed box (7) is provided with an air separation mechanism for separating impurities from bulk grain. The air separation mechanism includes a perforated plate (8), and the perforated plate (8) is fixedly connected to one end of the fixed box (7). One end of the perforated plate (8) is fixedly connected to a first blower (9), and one end of the fixed box (7) is fixedly connected to a wind duct (10).

3. The sorting device for bulk grain sampling according to claim 2, characterized in that: One end of the air duct (10) extends into the interior of the sorting rack (1), and the first fan (9) is located at one end of the air duct (10).

4. The sorting device for bulk grain sampling according to claim 3, characterized in that: The sorting rack (1) is provided with a material anti-accumulation mechanism between its two ends. The material anti-accumulation mechanism includes a deflector plate (11), and the deflector plate (11) is rotatably connected to one side between the two ends of the sorting rack (1). One end of the deflector plate (11) is fixedly connected to a fan blade (12), and the fan blade (12) is located at one end of the air duct (10).

5. The sorting device for bulk grain sampling according to claim 4, characterized in that: The residue trough (29) is equipped with a cleaning mechanism for processing impurities. The cleaning mechanism includes a bidirectional threaded rod (13), which is connected to a toggle plate (11) via a pulley. A movable block (14) is threadedly connected to the outer side of the bidirectional threaded rod (13), and a fixed box (15) is fixedly connected to the bottom end of the movable block (14). A cleaning brush (17) is fixedly connected inside the fixed box (15) via a connecting spring (16).

6. The sorting device for bulk grain sampling according to claim 5, characterized in that: The fixed box (15) and the residue trough (29) are slidably connected, and the bottom end of the cleaning brush (17) is in contact with the bottom end of the residue trough (29).

7. The sorting device for bulk grain sampling according to claim 1, characterized in that: A conductive sheet (25) is fixedly connected to one side of the limiting rod (23) and one side inside the fixing rod (26), and the positions of the conductive sheets (25) correspond to each other.

8. A sorting device for bulk grain sampling according to claim 7, characterized in that: One end of the fixing rod (26) is provided with a fixing groove (28), and a toggle block (27) is slidably connected inside the fixing groove (28). The toggle block (27) is connected to the limiting rod (23).

Images