Grain dust screening device

Abstract

The invention discloses a grain sand and dust screening device, which belongs to the field of grain screening and comprises a shell, a screening component is arranged on the inner side and the outer side of the shell, the screening component comprises electric push rods fixedly mounted at the front end and the rear end of the left side of the shell, and the telescopic ends of the electric push rods penetrate into the shell and are fixedly connected with sliding blocks; according to the device, sand and dust carried among corn kernels and in insect holes and insect marks are screened out in the up-down fluctuation process of a first screen, and the corn kernels are bumped due to up-down fluctuation type movement of a collecting box in the conveying process of the corn kernels; according to the device, sand and dust carried in collected corn kernels can be screened out, meanwhile, sand and dust hidden in insect holes and insect marks on the surfaces of the corn kernels can be conveniently shaken out, and the situation that in the storage process of the corn kernels, due to the fact that the sand and dust hidden in the insect holes and the insect marks become nutrient sources of microorganisms, the corn kernels go mouldy and go bad is effectively reduced.

Description

Technical Field

[0001] The invention relates to the field of grain screening, and more specifically to a grain sand and dust screening device. Background Art

[0002] Grain refers to the general term for various plant seeds used in cooking food, which can also be generally referred to as "cereals". Grain is mainly divided into several categories: cereals (rice, wheat, millet, chestnut and corn, etc.), beans (soybean, mung bean, adzuki bean, black bean, etc.), tubers (sweet potato, potato, etc.), oil crops (sesame, rapeseed, etc.) and miscellaneous grains (millet, coix seed, sorghum rice, etc.). The eating habits and types of grain may vary in different regions. In addition, with the advancement of science and technology and changes in agricultural production methods, new types of grain and products are constantly emerging.

[0003] After corn is harvested from the field, it needs to be pre-dried to reduce the moisture content of the corn kernels, making it easier to thresh the corn. The threshed corn kernels still need to be dried until they reach the moisture content standard for storage. In order to improve the drying efficiency of corn kernels, the corn kernels are usually spread out on the drying ground. When recycling, it is inevitable that the sand and dust remaining on the ground of the drying ground will be collected together. Therefore, before the corn kernels are stored, the sand and dust carried inside the corn kernels need to be screened out; In the prior art, corn will inevitably be attacked by various pests during its growth, such as corn borers and armyworms. These pests will bite or lay eggs on the corn kernels, resulting in insect holes and insect marks on the corn kernels. The insect holes and insect marks will provide hiding space for sand and dust. During the storage of corn, sand and dust will also serve as a nutrient source for microorganisms, promoting the growth and reproduction of mold. If the sand and dust are not removed in time, the corn kernels will become moldy and deteriorate. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a grain dust screening device.

[0005] In order to solve the above problems, the present invention adopts the following technical solution, which can screen out the sand and dust carried in the corn kernels, and also facilitate shaking out the sand and dust hidden in the insect eyes and insect marks on the surface of the corn kernels.

[0006] A grain dust screening device comprises a housing and a feeding pipe fixedly mounted on the upper side of the housing, wherein the inner and outer sides of the housing are provided with screening components, wherein the screening components comprise electric push rods fixedly mounted on the front and rear ends of the left side of the housing, and the telescopic end of the electric push rods penetrates into the housing; The telescopic end of the electric push rod is fixedly connected with a slider, and a collection box is slidably provided inside the shell, and slide grooves are provided at both front and rear ends of the left side of the collection box, and the slider is slidably connected in the slide groove, and rollers are rotatably connected at the front and rear sides of the collection box, and a first screen is slidably penetrated through the lower part of the collection box, and the front and rear ends of the lower left side of the first screen are fixedly connected with fixing bars, and guide rails are fixedly installed on the front and rear sides of the shell, and the two fixing bars are slidably connected to the inside of the two guide rails after moving to the left, and a support bar is fixedly connected to the inner upper side of the guide rail, and guide grooves are provided on the front and rear sides of the shell, and the roller is rotatably connected in the guide groove, and a soaking chamber is provided on the left side of the shell.

[0007] Furthermore, the guide groove is located above the guide rail, and the first screen is squeezed into contact with the support bar after moving to the left, and the first screen is misaligned with the soaking chamber after the collecting box moves to just above the soaking chamber, the right half of the guide groove is wavy, and the left half of the guide groove is straight.

[0008] Furthermore, a stirring assembly is provided inside the shell, and the stirring assembly includes a pressure sensor fixedly installed on the left side inside the shell.

[0009] Furthermore, the left side of the collecting box moves to the left and is squeezed into contact with the right side of the pressure sensor. A driving motor is fixedly installed at the inner center of the outer shell. A stirring blade is fixedly connected to the output end of the driving motor. The stirring blade is located inside the immersion chamber.

[0010] Furthermore, a sweeping assembly is provided inside the soaking chamber, and the sweeping assembly includes a brush fixedly connected to the inner wall of the soaking chamber, and the brush is wrapped around the outer side of the stirring blade.

[0011] Furthermore, a sweeping assembly is provided inside the soaking chamber, and the sweeping assembly includes a brush fixedly connected to the inner wall of the soaking chamber, and the brush is wrapped around the outer side of the stirring blade.

[0012] Furthermore, a second screen is fixedly installed inside the partition frame, and a movable groove is jointly provided on the left side of the interior of the partition frame and the interior of the second screen, a movable block is inserted into the upper side of the partition frame, a slope is provided on the lower side of the vertical part of the movable block, and the movable block is in an inverted "L" shape, and the lower half of the movable block is slidably connected in the movable groove, a pressure block is slidably connected to the left side of the interior of the movable groove, a slope is provided on the upper side of the pressure block, the slope of the vertical part of the movable block is in sliding contact with the slope of the pressure block, a floating plate is fixedly installed on the lower side of the horizontal plane of the movable block, a partition net is slidably connected to the interior of the movable groove, the left side of the partition net is fixedly connected to the right side of the pressure block, and a drain box is slidably connected to the lower side of the interior of the outer shell.

[0013] Furthermore, the drain box is located below the second screen, the aperture of the first screen is smaller than the aperture of the second screen, the partition frame is erected on the upper side of the drain box, and the partition frame and the drain box are both pulled out from the inside of the outer shell after moving to the left.

[0014] Furthermore, an ash collecting component is provided inside the shell, and the ash collecting component includes a collecting chamber opened on the right side inside the shell.

[0015] Furthermore, a delivery pipe is fixedly installed on the right side of the interior of the collection chamber, the delivery pipe is connected to the collection chamber, and the other end of the delivery pipe is connected to an external air extraction device.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention uses a first screen to screen out dust between corn kernels and inside worm holes and worm marks during the up and down fluctuation process. Since the collecting box is used to transport corn kernels, the corn kernels are shaken by the up and down fluctuation movement of the collecting box. This not only screens out dust carried by the collected corn kernels, but also facilitates the shaking out of dust hidden in worm holes and worm marks on the surface of the corn kernels. This effectively reduces the risk of the corn kernels becoming moldy and deteriorating due to dust hidden in worm holes and worm marks becoming a nutrient source for microorganisms during storage.

[0017] (2) The present invention stores a specific ratio of salt water in a soaking chamber and soaks corn kernels with the salt water solution. After the corn kernels are soaked in the salt water solution, the sand and dust hidden in the worm holes or worm marks are gradually discharged. This not only distinguishes the corn kernels with worm holes or worm marks to ensure the quality of the corn kernels, but also further prevents the corn kernels from becoming moldy and deteriorating during storage.

[0018] (3) The present invention stirs the brine solution by means of the stirring blades to accelerate the flow rate of the brine solution. Since the stirring blades accelerate the flow of the brine solution, the brine solution can more easily enter the worm holes or worm holes and bring out the sand and dust inside the worm holes or worm holes, thereby effectively improving the efficiency of removing the sand and dust hidden inside the worm holes or worm holes from the corn kernels, thereby preventing the corn kernels from becoming moldy and deteriorating during storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the cross-section structure of the present invention; Figure 3 It is a schematic cross-sectional structural diagram of the housing of the present invention; Figure 4 It is a schematic cross-sectional structural diagram of the collection box of the present invention; Figure 5 It is a structural schematic diagram of the chute of the present invention; Figure 6 It is a schematic cross-sectional structural diagram of the guide rail of the present invention; Figure 7 It is a schematic cross-sectional structural diagram of the partition frame of the present invention; Figure 8 It is a schematic cross-sectional structural diagram of the partition net of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the material discharge pipe of the present invention.

[0020] Description of the numbers in the figure: 1. Shell; 11. Feeding pipe; 2. Screening component; 21. Electric push rod; 211. Sliding block; 22. Collecting box; 221. Slide; 222. Roller; 23. First screen; 24. Fixing bar; 25. Guide rail; 251. Support bar; 26. Guide groove; 27. Soaking chamber; 28. Stirring component; 281. Pressure sensor; 282. Driving motor; 283. Stirring blade; 29. ​​Sweeping component; 291. Brush; 3. Discharging component; 31. Partition frame; 32. Second screen; 33. Moving block; 34. Floating plate; 35. Movable groove; 36. Pressure block; 37. Partition net; 38. Drain box; 39. Ash collecting component; 391. Collecting chamber; 392. Delivery pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 9 A grain dust screening device comprises a housing 1 and a feeding pipe 11 fixedly mounted on the upper side of the housing 1, a screening component 2 is provided on the inner and outer sides of the housing 1, and the screening component 2 comprises an electric push rod 21 fixedly mounted on the front and rear ends of the left side of the housing 1, and the telescopic end of the electric push rod 21 penetrates into the interior of the housing 1; The telescopic end of the electric push rod 21 is fixedly connected with a slider 211, and a collecting box 22 is slidably arranged inside the shell 1. Slide grooves 221 are provided at both the front and rear ends of the left side of the collecting box 22, and the slider 211 is slidably connected in the slide groove 221. The front and rear sides of the collecting box 22 are rotatably connected with rollers 222. A first screen 23 slides through the lower part of the collecting box 22, and a fixing bar 24 is fixedly connected at both the front and rear ends of the lower left side of the first screen 23. Guide rails 25 are fixedly installed on the front and rear sides of the shell 1. After the two fixing bars 24 move to the left, they are respectively slidably connected to the inside of the two guide rails 25. A support bar 251 is fixedly connected to the upper side of the inner part of the guide rails 25. Guide grooves 26 are provided on both the front and rear sides of the shell 1, and the roller 222 is rollingly connected in the guide groove 26. An immersion chamber 27 is provided on the left side of the inside of the shell 1.

[0023] By adopting the above technical solution, the corn kernels are first poured into the feeding pipe 11, so that the corn kernels are guided into the interior of the collecting box 22. At this time, the movable first screen 23 inside the collecting box 22 will support the corn kernels, and the sand and dust carried by the corn kernels will pass through the first screen 23. At the same time, the electric push rod 21 will pull the collecting box 22, causing the rollers 222 on the front and rear sides of the collecting box 22 to roll in the guide grooves 26 on the front and rear sides of the shell 1. Because the right half of the guide groove 26 is wavy, the rollers 222 roll in the guide groove 26 and drive the collecting box 22 to move leftward in an up and down undulating manner. After being bumped, the sand and dust between the corn kernels and in the worm eyes and worm marks of the corn kernels will be further bumped out. As the first screen 23 contacts the support bar 251, the fixed bar 24 on the lower side of the first screen 23 will enter The guide rail 25, when the roller 222 reaches the top of the guide groove 26, the fixed bar 24 under the first screen 23 will rise with it, but will still be in contact with the support bar 251. After the first screen 23 is pushed away by the support bar 251, the lower side of the collecting box 22 will be connected with the soaking chamber 27, so that the corn kernels fall into the soaking chamber 27 from above the collecting box 22 and the first screen 23, and are finally soaked in the saline solution inside the soaking chamber 27. Since the collecting box 22 will cause the corn kernels to be bumped due to the up and down movement of the collecting box 22 during the transportation of the corn kernels, not only can the sand and dust carried in the collected corn kernels be screened out, but it is also convenient to shake out the sand and dust hidden in the worm eyes and worm marks on the surface of the corn kernels, effectively reducing the possibility that the sand and dust hidden in the worm eyes and worm marks during the storage of the corn kernels will become a nutrient source for microorganisms, causing the corn kernels to become moldy and deteriorate.

[0024] like Figure 2 , Figure 3 and Fig. 9As shown, the guide groove 26 is located above the guide rail 25, and the first screen 23 moves to the left and is squeezed into contact with the support bar 251. After the collecting box 22 moves to the top of the soaking chamber 27, the first screen 23 is misaligned with the soaking chamber 27. The right half of the guide groove 26 is wavy, and the left half of the guide groove 26 is straight.

[0025] By adopting the above technical solution, first, after the corn kernels enter the soaking chamber 27, about 2 to 4 grams of salt are added to the solution in the soaking chamber 27 for every 100 milliliters of water. Such a ratio can provide a moderate osmotic pressure, which is helpful to separate the damaged corn kernels. After being soaked in the salt water solution, the undamaged corn kernels will sink to the bottom of the soaking chamber 27, while the corn kernels with worm holes and worm marks will be suspended in different positions of the salt water solution, or even on the liquid surface, according to the degree of damage. At the same time, after the salt water solution enters the worm holes and worm marks, the sand and dust hidden inside them gradually soften after being soaked in the salt water solution, and finally discharged from the worm holes or worm marks. After the corn kernels discharge the sand and dust, their own weight changes, and finally they float upward. Since the sand and dust hidden in the worm holes or worm marks will be gradually discharged after the corn kernels are soaked in the salt water solution, not only can the corn kernels with worm holes or worm marks be distinguished to ensure the quality of the corn kernels, but also the corn kernels can be further prevented from becoming moldy and deteriorating during storage.

[0026] like Figure 2 and Figure 6 As shown, a stirring assembly 28 is provided inside the housing 1 , and the stirring assembly 28 includes a pressure sensor 281 fixedly installed on the left side inside the housing 1 .

[0027] The left side of the collecting box 22 moves to the left and is squeezed into contact with the right side of the pressure sensor 281. A driving motor 282 is fixedly installed at the inner center of the outer shell 1. A stirring blade 283 is fixedly connected to the output end of the driving motor 282. The stirring blade 283 is inside the immersion chamber 27.

[0028] By adopting the above technical solution, first, after the collection box 22 contacts the pressure sensor 281, the pressure sensor 281 will transmit information to the external controller. After receiving the information, the external sensor will control the operation of the drive motor 282. After the operation of the drive motor 282, it will drive the stirring blade 283 to rotate. The stirring blade 283 will accelerate the flow of the brine solution during the rotation, making it easier for the brine to soak the sand and dust. After the stirring blade 283 accelerates the flow of the brine solution, the brine solution will more easily enter the insect eyes or insect marks, and bring out the sand and dust in the insect eyes or insect marks, thereby effectively improving the efficiency of corn kernels in removing sand and dust hidden in the insect eyes or insect marks, and once again preventing the corn kernels from becoming moldy and deteriorating during storage.

[0029] like Figure 6As shown, a cleaning assembly 29 is provided inside the soaking chamber 27 , and the cleaning assembly 29 includes a brush 291 fixedly connected to the inner wall of the soaking chamber 27 , and the brush 291 is wrapped around the outer side of the stirring blade 283 .

[0030] A cleaning assembly 29 is provided inside the soaking chamber 27 . The cleaning assembly 29 includes a brush 291 fixedly connected to the inner wall of the soaking chamber 27 . The brush 291 is wrapped around the outer side of the stirring blade 283 .

[0031] By adopting the above technical solution, first, when the stirring blade 283 accelerates the flow rate of the brine solution, the corn kernels carried by the brine solution will collide with the brush 291 wrapped on the outside of the stirring blade 283. During this process, the brush 291 will rub the worm holes or worm marks on the surface of the corn kernels. After the bristles of the brush 291 enter the worm holes or worm marks, the sand and dust softened by the brine solution will adhere to the outside of the bristles of the brush 291 and eventually be brought out of the worm holes or worm marks. Since the bristles of the brush 291 will bring out the sand and dust hidden in the worm holes or worm marks after being inserted into the worm holes or worm marks, the time used to remove the sand and dust hidden in the worm holes or worm marks is accelerated, thereby preventing the corn kernels from becoming moldy and deteriorating during storage.

[0032] like Figures 6 to 8 As shown, a discharge component 3 is provided inside the housing 1 , and the discharge component (3) comprises a partition frame 31 movably mounted inside the soaking chamber 27 .

[0033] A second screen 32 is fixedly installed inside the partition frame 31, and a movable groove 35 is jointly provided on the left side of the interior of the partition frame 31 and the interior of the second screen 32. A movable block 33 is inserted on the upper side of the partition frame 31, and a slope is provided on the lower side of the vertical part of the movable block 33. The movable block 33 is in an inverted "L" shape, and the lower half of the movable block 33 is slidably connected in the movable groove 35. A pressure block 36 is slidably connected to the left side of the interior of the movable groove 35, and a slope is provided on the upper side of the pressure block 36. The slope of the vertical part of the movable block 33 is in sliding contact with the slope of the pressure block 36. A floating plate 34 is fixedly installed on the lower side of the horizontal plane of the movable block 33, and a partition net 37 is slidably connected inside the movable groove 35. The left side of the partition net 37 is fixedly connected to the right side of the pressure block 36. A drain box 38 is slidably connected to the lower side of the interior of the outer shell 1.

[0034] The drain box 38 is located below the second screen 32, the aperture of the first screen 23 is smaller than the aperture of the second screen 32, the partition frame 31 is set on the upper side of the drain box 38, and the partition frame 31 and the drain box 38 are both pulled out from the inside of the outer shell 1 after moving to the left.

[0035] By adopting the above technical solution, the corn kernels are first soaked in the salt water solution for about 20 to 30 minutes. After sinking, the whole corn kernels will pass through the second screen 32 inside the partition frame 31 and finally be collected by the drain tank 38. After the soaking time is up, the pipe equipped on the front of the shell 1 will gradually discharge the salt water solution inside the soaking tank. As the amount of the salt water solution gradually decreases, the moving block 33 supported by the float plate 34 will move downward inside the movable groove 35 due to the drop in liquid level. After the lower inclined surface of the moving block 33 contacts the inclined surface of the pressure block 36 inside the movable groove 35, the moving block 33 will squeeze the pressure block 36, and the pressure block 36 will drive the partition fixed to it after being squeezed. The net 37 moves to the right, so that the partition net 37 blocks the holes of the second screen 32, so that the brine solution can still pass through the second screen 32, but the corn kernels cannot pass through the second screen 32. When the brine solution in the drain box 38 is discharged, the partition frame 31 and the drain box 38 can be pulled out from the left side of the outer shell 1, and the corn kernels after soaking need to be quickly dried before storage. During the soaking process, the whole corn kernels and the corn kernels with worm eyes or worm marks can be distinguished to prevent the two from mixing again. At the same time, after the brine solution is discharged, the whole corn kernels and the corn kernels with worm eyes or worm marks can be quickly taken out, so that the efficiency of screening sand and dust from the corn kernels is improved.

[0036] like Figure 2 and Figure 3 As shown, an ash collecting assembly 39 is provided inside the shell 1 , and the ash collecting assembly 39 includes a collecting chamber 391 opened on the right side inside the shell 1 .

[0037] A delivery pipe 392 is fixedly installed on the right side of the collecting chamber 391 . The delivery pipe 392 is connected to the collecting chamber 391 , and the other end of the delivery pipe 392 is connected to an external air extraction device.

[0038] By adopting the above technical solution, first, when the corn kernels enter the collecting box 22 and are collected by the first screen 23, the external exhaust equipment in working state will extract the air inside the collecting chamber 391 through the conveying pipe 392, and the shaken-off dust will also be extracted. The dust generated by the corn kernels themselves is combustible dust, which is also extracted at this time. Since the dust screened out from the corn kernels is quickly extracted after entering the collecting chamber 391, the concentration of combustible substances in the dust suspended in the air is effectively avoided from increasing, thereby preventing the possibility of dust explosion during the screening of sand and dust from the corn kernels.

[0039] Working principle: First, the corn kernels are sent into the collecting box 22 through the feeding pipe 11, and the sand and dust carried by the corn kernels will pass through the first screen 23. Then the electric push rod 21 pulls the collecting box 22, causing the rollers 222 on the front and rear sides of the collecting box 22 to roll in the guide groove 26, and drive the collecting box 22 and the corn kernels to move up and down in a fluctuating manner to one side. At this time, the sand and dust carried in the worm eyes and worm marks on the surface of the corn kernels will be further knocked out. At the same time, the corn kernels enter the collecting box 22 and are collected by the first screen 23, the external exhaust equipment in working state will extract the air inside the collecting chamber 391 through the conveying pipe 392, and the shaken sand and dust will also be extracted. The dust generated by the corn kernels themselves is combustible dust, and it is also at this time. After the first screen 23 contacts the support bar 251, the fixed bar 24 on the lower side of the first screen 23 will enter the guide rail 25. After the first screen 23 is pushed away by the support bar 251, the corn kernels fall into the soaking chamber 27 from the collecting box 22 and the top of the first screen 23. After the corn kernels enter the soaking chamber 27, because the solution inside the soaking chamber 27 contains about 2 to 4 grams of salt per 100 milliliters of water, after being soaked in the salt water solution, the undamaged corn kernels will sink to the bottom of the soaking chamber 27, while the corn kernels with worm eyes and worm marks will be suspended in different positions of the salt water solution according to the degree of damage. The sand and dust hidden inside the corn kernels will gradually soften after being soaked in the salt water solution, and the worm eyes or worm marks will eventually be discharged. After the collecting box 22 contacts the pressure sensor 281, the driving motor 282 is controlled by the external controller to drive the stirring blade 283 to rotate. The stirring blade 283 will accelerate the flow of the salt water solution during the rotation, so that the salt water will be easier to soak the sand and dust. When the stirring blade 283 accelerates the flow rate of the salt water solution, the corn kernels carried by the salt water solution will hit the brush 291 wrapped on the outside of the stirring blade 283. In this process, the brush 291 will rub the insect eyes or insect marks on the surface of the corn kernels, and the sand and dust softened by the salt water solution will adhere to the outside of the bristles of the brush 291 and eventually be taken out of the insect eyes or insect marks. As the corn kernels are soaked in the salt water solution for about 20 to 30 minutes, the complete corn kernels will sink through the partition. The second screen 32 inside the broken frame 31 is finally collected by the drain tank 38. After the soaking time is reached, the pipe equipped on the front side of the shell 1 will gradually discharge the brine solution inside the soaking tank. As the amount of brine solution gradually decreases, the movable block 33 supported by the float plate 34 will move downward inside the movable groove 35 due to the drop in liquid level, and squeeze the pressure block 36. At this time, the pressure block 36 drives the partition net 37 fixed thereto to move to the right, so that the partition net 37 blocks the holes of the second screen 32, so that the brine solution can still pass through the second screen 32, while the corn kernels cannot pass through the second screen 32. When the brine solution in the drain tank 38 is discharged, the partition frame 31 and the drain tank 38 can be pulled out from the left side of the shell 1.

[0040] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A grain dust screening device, comprising a housing (1) and a feed pipe (11) fixedly mounted on the upper side of the housing (1), characterized in that: The inner and outer sides of the housing (1) are provided with a screening component (2), the screening component (2) comprising an electric push rod (21) fixedly mounted at the front and rear ends of the left side of the housing (1), the telescopic end of the electric push rod (21) extending through the interior of the housing (1); The telescopic end of the electric push rod (21) is fixedly connected to a slider (211), a collection box (22) is slidably disposed inside the housing (1), a slide groove (221) is provided at both the front and rear ends of the left side of the collection box (22), the slider (211) is slidably connected in the slide groove (221), the front and rear sides of the collection box (22) are rotatably connected to rollers (222), a first screen (23) is slidably penetrated through the lower part of the collection box (22), and both the front and rear ends of the lower left side of the first screen (23) are A fixing strip (24) is fixedly connected thereto; guide rails (25) are fixedly installed on both the front and rear sides of the shell (1); the two fixing strips (24) are respectively slidably connected to the inside of the two guide rails (25) after being moved to the left; a support strip (251) is fixedly connected to the upper side of the inside of the guide rail (25); guide grooves (26) are provided on both the front and rear sides of the shell (1); the roller (222) is rollingly connected in the guide grooves (26); and an immersion chamber (27) is provided on the left side of the inside of the shell (1).

2. A grain dust screening device according to claim 1, characterized in that: The guide groove (26) is located above the guide rail (25); the first screen (23) moves to the left and comes into contact with the support bar (251); the first screen (23) is misaligned with the soaking chamber (27) after the collection box (22) moves to the top of the soaking chamber (27); the right half of the guide groove (26) is wavy, and the left half of the guide groove (26) is straight.

3. A grain dust screening device according to claim 1, characterized in that: A stirring assembly (28) is provided inside the housing (1), and the stirring assembly (28) comprises a pressure sensor (281) fixedly mounted on the left side inside the housing (1).

4. A grain dust screening device according to claim 3, characterized in that: The left side of the collection box (22) moves leftwards and comes into contact with the right side of the pressure sensor (281) by compression. A drive motor (282) is fixedly mounted at the inner center of the housing (1). A stirring blade (283) is fixedly connected to the output end of the drive motor (282). The stirring blade (283) is located inside the soaking chamber (27).

5. A grain dust screening device according to claim 4, characterized in that: A sweeping assembly (29) is provided inside the soaking chamber (27), and the sweeping assembly (29) comprises a brush (291) fixedly connected to the inner wall of the soaking chamber (27), and the brush (291) is wrapped around the outer side of the stirring blade (283).

6. A grain dust screening device according to claim 1, characterized in that: A discharge component (3) is provided inside the housing (1), and the discharge component (3) comprises a partition frame (31) movably mounted inside the soaking chamber (27).

7. A grain dust screening device according to claim 6, characterized in that: A second screen (32) is fixedly mounted inside the partition frame (31); a movable groove (35) is provided on the left side of the interior of the partition frame (31) and the interior of the second screen (32); a moving block (33) is inserted into the upper side of the partition frame (31); a slope is provided on the lower side of the vertical portion of the moving block (33); the moving block (33) is in an inverted "L" shape; the lower half of the moving block (33) is slidably connected in the movable groove (35); the left side of the interior of the movable groove (35) is A pressure block (36) is slidably connected to the side, an inclined surface is provided on the upper side of the pressure block (36), the inclined surface of the vertical part of the movable block (33) is in sliding contact with the inclined surface of the pressure block (36), a floating plate (34) is fixedly installed on the lower side of the horizontal plane of the movable block (33), a partition net (37) is slidably connected inside the movable groove (35), the left side of the partition net (37) is fixedly connected to the right side of the pressure block (36), and a drain box (38) is slidably connected to the lower side of the inner part of the shell (1).

8. A grain dust screening device according to claim 7, characterized in that: The drain box (38) is located below the second screen (32); the aperture of the first screen (23) is smaller than the aperture of the second screen (32); the partition frame (31) is arranged on the upper side of the drain box (38); and the partition frame (31) and the drain box (38) are both pulled out from the inside of the housing (1) after moving to the left.

9. The grain dust screening device according to claim 1, characterized in that: An ash collecting component (39) is provided inside the shell (1), and the ash collecting component (39) comprises a collecting chamber (391) opened on the right side inside the shell (1).

10. A grain dust screening device according to claim 9, characterized in that: A delivery pipe (392) is fixedly installed on the right side of the interior of the collection chamber (391); the delivery pipe (392) is connected to the collection chamber (391); and the other end of the delivery pipe (392) is connected to an external air extraction device.

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