Grain vibrating screen with pretreatment mechanism
By using a grain vibrating screen with a pretreatment mechanism and utilizing the three-stage coordinated processing of magnetic separation rollers, rubbing sleeves and beating rods, the problem of impurities after grain vibrating screen screening is solved, and the impurities and insect eggs in the grain are efficiently removed, thereby improving the cleanliness and quality of the finished grain.
Patent Information
- Application Number
- CN202510916694.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-03
- Publication Date
- 2025-09-26
AI Technical Summary
The existing grain vibrating screen still contains impurities after screening, especially impurities hidden in the folds of the grain, and fails to completely remove the grain shell, resulting in the screened grain being unable to be directly used or stored.
A grain vibrating screen with a pretreatment mechanism was designed, which includes a three-stage collaborative processing system consisting of a magnetic separation roller, a rubbing sleeve and a beating rod. Metal impurities are removed by magnetic separation, impurities and insect eggs on the grain surface are removed by rubbing, and efficient grading is achieved by using negative pressure dust removal and vibration screening.
The cleanliness of finished grains has been significantly improved, with impurity content reduced to below 0.3%, meeting national high-quality grain standards and ensuring the integrity and cleanliness of the grains.
Smart Images
Figure CN120696080A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of agricultural and grain machinery, in particular to a grain vibrating screen with a pre-processing mechanism. Background Art
[0002] The vibrating screen is a high-precision fine powder screening machine with low noise, high efficiency, and a quick screen change time of 3-5 minutes. Its fully enclosed structure makes it suitable for screening and filtering materials such as granules, powders, and mucus. The vibrating screen uses an upright motor as the vibration source. Eccentric weights are installed at the top and bottom of the motor, converting the motor's rotational motion into three-dimensional motion: horizontal, vertical, and tilted. This motion is then transmitted to the screen surface. Adjusting the phase angle between the top and bottom ends can change the trajectory of the material on the screen surface.
[0003] The current grain vibrating screen can only separate grain and most impurities, but some impurities will be hidden in the folds of the grain. In addition, some grains are not perfectly shelled, so the screened grain will still contain a certain amount of impurities, making the grain unable to be used or stored directly. Summary of the Invention
[0004] In order to solve the problem of impurities in grain after being screened by a vibrating screen as mentioned in the background art, the present invention aims to provide a grain vibrating screen with a pre-treatment mechanism.
[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a grain vibrating screen with a pre-treatment mechanism, comprising a bracket, a screening box being mounted on the bracket via a buffer seat, a dust removal channel being mounted on the bracket, a first dust removal box and a second dust removal box being mounted on the bracket, the dust removal channel being connected to the second dust removal box via a connecting groove, the second dust removal box being connected to the first dust removal box, a bag dust collector being mounted on the first dust removal box, and the connecting groove and the dust removal channel being connected via a second impurity guide channel;
[0006] The first dust removal box is equipped with a pre-treatment device, which is arranged in conjunction with the screening box;
[0007] The pretreatment device includes a feed bin and a pretreatment channel, wherein a third material guide plate and a feeding port are provided in the feed bin, and the feeding port is connected to the pretreatment channel through the third material guide plate;
[0008] A plurality of first rotating shafts are rotatably mounted on the pretreatment channel, a sleeve is fixedly mounted on the first rotating shaft, a plurality of support frames are fixedly mounted on the sleeve, the support frames are arranged in a circular array with the axis of the first rotating shaft as the center, a buffer sleeve is co-installed on the support frame, and a rubbing sleeve is co-installed between every two adjacent support frames.
[0009] Furthermore, a number of moving wheels are installed on the lower side of the bracket, and a first screening plate and a second screening plate are installed in the screening box. The first screening plate is located above the second screening plate. A large particle discharge port and a small particle discharge port are installed on the screening box. The large particle discharge port is located above the first screening plate, and the small particle discharge port is located below the second screening plate.
[0010] Furthermore, a qualified material discharge port is installed between the first screening plate and the second screening plate, and two relatively arranged vibration motors are installed on the screening box.
[0011] Furthermore, a second ash-discharging auger is installed on the lower side of the first dust removal box and the second dust removal box, and a plurality of baffles are installed inside the first dust removal box and the second dust removal box.
[0012] Furthermore, the qualified material discharge port extends into the dust removal channel, and a grain discharge port is installed on the lower side of the dust removal channel.
[0013] Furthermore, a magnetic separation roller is rotatably installed in the feed bin, a first ash discharge auger is cooperatively installed in the feed bin, a scraper plate is provided on one side of the first ash discharge auger, and the scraper plate is cooperatively arranged with the magnetic separation roller;
[0014] A third drive motor is installed on one side of the feed bin, and the third drive motor drives the magnetic separation roller. A fourth drive motor is also installed on one side of the feed bin, and the fourth drive motor drives the first ash discharge auger.
[0015] Furthermore, the first rotating shaft is linked to a chain through a gear, and a first driving motor is mounted on the feed bin. The first driving motor is connected to the first rotating shaft through corresponding gears and chains.
[0016] Furthermore, a buffer cavity is formed between the buffer sleeve and the support frame, and a rubbing material chamber is formed between the rubbing material sleeve and the support frame. The pressure inside the buffer cavity is 0.9 standard atmospheric pressure, and the pressure inside the rubbing material chamber is 1.1 standard atmospheric pressure.
[0017] A supporting frame is installed on the supporting frame, a plurality of fixing grooves are provided on the pre-processing channel, and a debris suction plate is installed in the fixing groove. The debris suction plate is arranged in cooperation with the buffer sleeve and the material rubbing sleeve.
[0018] Furthermore, the debris absorption plate includes a feeding section, a rubbing section and a discharging section, the feeding section and the discharging section are arc sections, the rubbing section is provided with a plurality of wavy rubbing patterns, and the debris absorption plate is a filter plate with holes;
[0019] A second collecting bin is installed on the upper side of the pretreatment channel, and a first collecting bin is installed on the lower side of the pretreatment channel. The first collecting bin and the second collecting bin are connected by a number of connecting pipes. A material baffle is installed in the pretreatment channel. The interior of the material baffle is hollow and connected to the second collecting bin. A number of through holes are provided on the material baffle.
[0020] Furthermore, the fixed groove is communicated with the interior of the first collecting bin, the first collecting bin is communicated with the connecting groove via a first impurity guide channel, the lower side of the pre-processing channel is communicated with the upper side of the screening box, and a first material guide plate and a second material guide plate are installed in the pre-processing channel;
[0021] A second rotating shaft is installed on the pretreatment channel, and a plurality of beating rods are installed on the second rotating shaft. The beating rods are located between the first guide plate and the second guide plate. A second drive motor is installed on one side of the pretreatment channel, and the second drive motor drives the second rotating shaft.
[0022] Compared with the prior art, the present invention has the following beneficial effects:
[0023] 1. During the operation of the present invention, the rubbing sleeve on the support frame rotates in a direction under the control of the driving system. When the rubbing sleeve rotates to the position corresponding to the suction plate, the rotational pressure of the rubbing sleeve presses the grain against the surface of the suction plate for deep rubbing. In this process, impurities, insect eggs and residual shells that have not completely fallen off attached to the surface of the grain can be effectively stripped off; the separated impurity mixture is transported to the multi-stage dust removal box through the negative pressure airflow of the first impurity guide channel, and is purified through cyclone separation and bag dust collector interception; the grain that has completed primary cleaning then enters the vibration screening system, and particle size classification is achieved through differentiated screen mesh apertures, and finally a finished product with a cleanliness level that meets the national high-quality grain standard is obtained, which significantly improves the cleanliness and quality of the finished grain.
[0024] 2. The present invention uses a permanent magnetic separation roller to pre-treat the grains by magnetic separation, and uses the high-intensity magnetic field on the roller surface to absorb metal particles and iron-containing impurities, and simultaneously realizes the directional discharge of impurities through the spiral conveying mechanism of the first ash auger; the grains that have completed magnetic separation enter the rotary rubbing process, and a three-dimensional spiral rubbing is implemented during the contact stage between the rubbing sleeve and the impurity suction plate to effectively remove insect eggs and residual shells; then, a frequency-converting driven multi-axis rubbing rod group applies 20-30Hz high-frequency mechanical excitation to the grains, with an impact acceleration of ≥5m / s 2 The targeted impact force dislodges surface particles. Finally, negative pressure dust removal and vibration screening combine to reduce the impurity content of the finished grain to below 0.3%, achieving two cleanliness levels higher than traditional processes. This staged processing system utilizes a three-stage synergistic effect: magnetic separation, agitation, and vibration, to remove impurities while ensuring grain integrity. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 The figure is a basic structural diagram of a grain vibrating screen with a pretreatment mechanism according to the present invention.
[0026] Figure 2 The figure is a schematic diagram of the internal structure of a grain vibrating screen with a pretreatment mechanism according to the present invention.
[0027] Figure 3 A grain vibrating screen with a pre-treatment mechanism according to the present invention Figure 2 main view.
[0028] Figure 4 A grain vibrating screen with a pre-processing mechanism according to the present invention Figure 3 Enlarged view of part A in .
[0029] Figure 5 A grain vibrating screen with a pre-processing mechanism according to the present invention Figure 3 Enlarged view of part B in .
[0030] Figure 6 The diagram is a schematic diagram of the matching relationship between the rubbing sleeve and the debris suction plate of a grain vibrating screen with a pre-treatment mechanism according to the present invention.
[0031] Figure 7 This is a schematic diagram of another matching relationship between the rubbing sleeve and the debris suction plate of a grain vibrating screen with a pre-treatment mechanism of the present invention.
[0032] Figure 8 The present invention is a schematic diagram of the internal structure of a pretreatment channel of a grain vibrating screen with a pretreatment mechanism.
[0033] Figure 9 The figure is a schematic diagram of the installation position of the magnetic separation roller of the grain vibrating screen with a pretreatment mechanism of the present invention.
[0034] In the figure: 101, bracket; 102, moving wheel; 103, buffer seat; 104, screening box; 1041, first screening plate; 1042, second screening plate; 105, vibration motor; 106, dust removal channel; 107, grain discharge port; 108, second impurity guide channel; 109, second ash discharge auger; 110, first dust removal box; 111, second dust removal box; 112, large particle discharge port; 113, small particle discharge port; 114, qualified material discharge port; 115, connecting groove; 116, bag filter; 300, pretreatment device; 301, feed bin; 302, pretreatment channel; 303, first rotating shaft; 304, first driving motor; 305, sleeve; 3051, support frame; 30 7. Support frame; 308. Buffer sleeve; 3081. Buffer chamber; 309. Material rubbing sleeve; 3091. Material rubbing chamber; 312. Fixed groove; 313. Trash suction plate; 3131. Feed section; 3132. Material rubbing section; 3133. Material discharge section; 315. Material blocking plate; 317. First collecting bin; 318. Second collecting bin; 319. Connecting pipe; 320. First guide plate; 321. Second guide plate; 322. Second rotating shaft; 323. Material beating rod; 324. First guide channel; 325. Second driving motor; 326. Feeding port; 327. Third guide plate; 328. Magnetic separation roller; 329. Scraper; 330. First ash auger; 331. Third driving motor; 332. Fourth driving motor DETAILED DESCRIPTION
[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0036] like Figures 1-9 As shown, the present embodiment provides a grain vibrating screen with a pretreatment mechanism, comprising a bracket 101, a plurality of movable wheels 102 being mounted on the lower side of the bracket 101, a screening box 104 being mounted on the bracket 101 via a buffer seat 103, a first screening plate 1041 and a second screening plate 1042 being mounted in the screening box 104, the first screening plate 1041 being located above the second screening plate 1042, a large particle discharge port 112 and a small particle discharge port 113 being mounted on the screening box 104, the large particle discharge port 112 being located above the first screening plate 1041, the small particle discharge port 113 being located below the second screening plate 1042, and a qualified material discharge port 114 being mounted between the first screening plate 1041 and the second screening plate 1042.
[0037] Two relatively arranged vibration motors 105 are installed on the screening box 104, a dust removal channel 106 is installed on the bracket 101, a qualified material discharge port 114 extends into the dust removal channel 106, and a grain discharge port 107 is installed on the lower side of the dust removal channel 106.
[0038] In this embodiment, when grain falls into the screening box 104, the first screening net is used to screen out large particle impurities and discharge them through the large particle discharge port 112, and the second screening net is used to screen out small particle impurities and discharge them through the small particle discharge port 113. Qualified grain is discharged into the dust removal channel 106 through the qualified material discharge port 114.
[0039] The first dust removal box 110 and the second dust removal box 111 are installed on the bracket 101. The dust removal channel 106 is connected to the second dust removal box 111 through the connecting groove 115. The second dust removal box 111 is connected to the first dust removal box 110. A bag dust collector 116 is installed on the first dust removal box 110. The second ash discharge auger 109 is installed on the lower side of the first dust removal box 110 and the second dust removal box 111. Several baffles are installed in the first dust removal box 110 and the second dust removal box 111. The connecting groove 115 and the dust removal channel 106 are connected through the second impurity guide channel 108.
[0040] Specifically, several baffles are installed in the first dust removal box 110 and the second dust removal box 111 to accelerate the falling of impurities, and the impurities are discharged through the second ash discharge auger 109. The bag dust collector 116 has the function of generating negative pressure, and the air in the dust removal channel 106 is sucked through the negative pressure, and the dust removal operation is performed through the bag dust collector 116. After the grain falls into the dust removal channel 106, the dust-containing gas is extracted twice through the connecting groove 115 and the second impurity guide channel 108, thereby further improving the dust removal effect.
[0041] A pretreatment device 300 is installed on the first dust removal box 110. The pretreatment device 300 includes a feed bin 301 and a pretreatment channel 302. A third guide plate 327 and a feeding port 326 are provided in the feed bin 301. The feeding port 326 is connected to the pretreatment channel 302 through the third guide plate 327. A magnetic separation roller 328 is rotatably installed in the feed bin 301. A first ash discharge auger 330 is installed in the feed bin 301. A scraper plate 329 is provided on one side of the first ash discharge auger 330. The scraper plate 329 is arranged in conjunction with the magnetic separation roller 328.
[0042] A third drive motor 331 is installed on one side of the feed bin 301, and the third drive motor 331 drives the magnetic separation roller 328. A fourth drive motor 332 is also installed on one side of the feed bin 301, and the fourth drive motor 332 drives the first ash discharge auger 330. In this embodiment, the magnetic separation roller 328 is located above the third guide plate 327. The magnetic separation roller 328 is set upward and is arranged in conjunction with the scraper plate 329. The magnetic separation roller 328 will generate a high-intensity magnetic field to absorb iron impurities in the grain.
[0043] A number of first rotating shafts 303 are rotatably installed on the pretreatment channel 302, and the first rotating shafts 303 are linked to each other through gears and chains. A first driving motor 304 is installed on the first feeding bin 301, and the first driving motor 304 is connected to the first rotating shaft 303 through corresponding gears and chains. A sleeve 305 is fixedly installed on the first rotating shaft 303, and a number of support frames 307 are fixedly installed on the sleeve 305. The support frames 307 are arranged in a circular array with the axis of the first rotating shaft 303 as the center. A buffer sleeve 308 is installed on the support frame 307, and a buffer cavity 3081 is formed between the buffer sleeve 308 and the support frame 307.
[0044] A rubbing sleeve 309 is installed between every two adjacent support frames 307, and a rubbing chamber 3091 is formed between the rubbing sleeve 309 and the support frame 307. The interior of the buffer cavity 3081 is 0.9 standard atmospheric pressure, and the interior of the rubbing chamber 3091 is 1.1 standard atmospheric pressure. A support skeleton 3051 is installed on the support frame 307, and a plurality of fixed grooves 312 are opened on the pretreatment channel 302. A debris absorption plate 313 is installed in the fixed groove 312, and the debris absorption plate 313 is arranged in conjunction with the buffer sleeve 308 and the rubbing sleeve 309.
[0045] In this embodiment, a number of rubbing protrusions are provided on the rubbing sleeve 309, which can increase the friction between the grain and the rubbing sleeve 309. The atmospheric pressure in the buffer cavity 3081 is lower than the standard atmospheric pressure, which can make the buffer sleeve 308 concave inward, making it convenient to move the grain after rubbing.
[0046] The debris suction plate 313 includes a feeding section 3131, a kneading section 3132 and a discharging section 3133. The feeding section 3131 and the discharging section 3133 are arc sections. The kneading section 3132 is provided with a number of wavy kneading patterns. The debris suction plate 313 is a perforated filter plate. A second collecting bin 318 is installed on the upper side of the pretreatment channel 302, and a first collecting bin 317 is installed on the lower side of the pretreatment channel 302. The first collecting bin 317 and the second collecting bin 318 are connected by a number of connecting pipes 319.
[0047] A baffle plate 315 is installed in the pretreatment channel 302. The baffle plate 315 is hollow inside and connected to the second collecting bin 318. A number of through holes are provided on the baffle plate 315. The fixed groove 312 is connected to the inside of the first collecting bin 317. The first collecting bin 317 is connected to the connecting groove 115 through the first impurity guide channel 324. The lower side of the pretreatment channel 302 is connected to the upper side of the screening box 104. A first material guide plate 320 and a second material guide plate 321 are installed in the pretreatment channel 302.
[0048] A second rotating shaft 322 is installed on the pre-processing channel 302, and several beating rods 323 are installed on the second rotating shaft 322. The beating rods 323 are located between the first guide plate 320 and the second guide plate 321. A second drive motor 325 is installed on one side of the pre-processing channel 302, and the second drive motor 325 drives the second rotating shaft 322.
[0049] It should be noted that when the present embodiment is in use, the grain will first pass under the magnetic separation roller 328. During this process, the magnetic separation roller 328 will also rotate and absorb the metal impurities in the grain. The metal impurities absorbed on the magnetic separation roller 328 will rotate to the first ash-discharging auger 330, and the metal impurities on the magnetic separation roller 328 will be scraped off by the scraper plate 329 and transmitted out by the first ash-discharging auger 330. After the grain passes through the magnetic separation roller 328 to remove the metal impurities, the grain will enter the pre-treatment channel 302, and the rubbing sleeve 309 on the support frame 307 can be used to rub the grain. When the rubbing sleeve 309 rotates to the position aligned with the impurity suction plate 31 3, the grain will be pressed by the rubbing sleeve 309 on the suction plate 313 and rubbed, so that the impurities, insect eggs and shells that are not completely removed on the grain are separated from the grain, and the separated impurities are transmitted to the dust removal channel 106 through the first impurity guide channel 324 due to the negative pressure. Then, after the grain is hit by the second rotating shaft 322, it falls into the screening box 104 for screening. When the screened grain falls into the dust removal channel 106, the separated impurities enter the dust removal box through the connecting groove 115 and the second impurity guide channel 108 due to the negative pressure for dust removal operation, and finally a finished product with a cleanliness level that meets the national high-quality grain standards is obtained, which significantly improves the cleanliness and quality of the finished grain.
[0050] In this document, relational terms such as first and second, etc., are used solely to distinguish one entity or operation from another entity or operation and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed or that are inherent to such process, method, article, or apparatus.
[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A grain vibrating screen with a pre-treatment mechanism, characterized by: The invention comprises a bracket (101), a screening box (104) is mounted on the bracket (101) via a buffer seat (103), a dust removal channel (106) is mounted on the bracket (101), a first dust removal box (110) and a second dust removal box (111) are mounted on the bracket (101), the dust removal channel (106) is connected to the second dust removal box (111) via a connecting groove (115), the second dust removal box (111) is connected to the first dust removal box (110), a bag dust collector (116) is mounted on the first dust removal box (110), and the connecting groove (115) is connected to the dust removal channel (106) via a second impurity guide channel (108); A pre-processing device (300) is installed on the first dust removal box (110), and the pre-processing device (300) is arranged in conjunction with the screening box (104); The pretreatment device (300) comprises a feed bin (301) and a pretreatment channel (302); a third guide plate (327) and a feeding port (326) are provided in the feed bin (301); the feeding port (326) is connected to the pretreatment channel (302) via the third guide plate (327); A plurality of first rotating shafts (303) are rotatably mounted on the pretreatment channel (302), a sleeve (305) is fixedly mounted on the first rotating shaft (303), a plurality of support frames (307) are fixedly mounted on the sleeve (305), the support frames (307) are arranged in a circular array with the axis of the first rotating shaft (303) as the center, a buffer sleeve (308) is mounted on the support frame (307), and a rubbing sleeve (309) is mounted between every two adjacent support frames (307).
2. The grain vibrating screen with a pretreatment mechanism according to claim 1, characterized in that: A plurality of moving wheels (102) are co-operated and installed on the lower side of the bracket (101); a first screening plate (1041) and a second screening plate (1042) are co-operated and installed in the screening box (104); the first screening plate (1041) is located above the second screening plate (1042); a large particle discharge port (112) and a small particle discharge port (113) are co-operated and installed on the screening box (104); the large particle discharge port (112) is located above the first screening plate (1041), and the small particle discharge port (113) is located below the second screening plate (1042).
3. The grain vibrating screen with a pretreatment mechanism according to claim 2, characterized in that: A qualified material discharge port (114) is installed between the first screening plate (1041) and the second screening plate (1042), and two vibration motors (105) arranged opposite to each other are installed on the screening box (104).
4. The grain vibrating screen with a pre-treatment mechanism according to claim 3, characterized in that: A second ash discharge auger (109) is installed on the lower side of the first dust removal box (110) and the second dust removal box (111), and a plurality of baffles are installed in the first dust removal box (110) and the second dust removal box (111).
5. The grain vibrating screen with a pre-treatment mechanism according to claim 4, characterized in that: The qualified material discharge port (114) extends into the dust removal channel (106), and a grain discharge port (107) is installed on the lower side of the dust removal channel (106).
6. The grain vibrating screen with a pre-treatment mechanism according to claim 1, characterized in that: A magnetic separation roller (328) is rotatably installed in the feed bin (301), and a first ash discharge auger (330) is cooperatively installed in the feed bin (301). A scraper plate (329) is provided on one side of the first ash discharge auger (330), and the scraper plate (329) is arranged in cooperation with the magnetic separation roller (328); A third drive motor (331) is installed on one side of the feed bin (301), and the third drive motor (331) drives the magnetic separation roller (328). A fourth drive motor (332) is also installed on one side of the feed bin (301), and the fourth drive motor (332) drives the first ash discharge auger (330).
7. The grain vibrating screen with a pre-treatment mechanism according to claim 6, characterized in that: The first rotating shaft (303) is linked to a chain through a gear, and a first driving motor (304) is mounted on the feeding bin (301). The first driving motor (304) is connected to the first rotating shaft (303) through corresponding gears and chains.
8. The grain vibrating screen with a pre-treatment mechanism according to claim 6, characterized in that: A buffer cavity (3081) is formed between the buffer sleeve (308) and the support frame (307), and a rubbing material chamber (3091) is formed between the rubbing material sleeve (309) and the support frame (307). The interior of the buffer cavity (3081) is at a standard atmospheric pressure of 0.9, and the interior of the rubbing material chamber (3091) is at a standard atmospheric pressure of 1.
1. A support frame (3051) is installed on the support frame (307), and a plurality of fixing grooves (312) are provided on the pre-processing channel (302). A debris absorption plate (313) is installed in the fixing groove (312). The debris absorption plate (313) is arranged in conjunction with the buffer sleeve (308) and the rubbing sleeve (309).
9. The grain vibrating screen with a pre-treatment mechanism according to claim 8, characterized in that: The impurity suction plate (313) comprises a feeding section (3131), a rubbing section (3132) and a discharging section (3133); the feeding section (3131) and the discharging section (3133) are arc sections; the rubbing section (3132) is provided with a plurality of wavy rubbing patterns; the impurity suction plate (313) is a filter plate with holes; A second collecting bin (318) is installed on the upper side of the pretreatment channel (302), and a first collecting bin (317) is installed on the lower side of the pretreatment channel (302). The first collecting bin (317) and the second collecting bin (318) are connected via a plurality of connecting pipes (319). A material blocking plate (315) is installed in the pretreatment channel (302). The interior of the material blocking plate (315) is hollow and connected to the second collecting bin (318). The material blocking plate (315) is provided with a plurality of through holes.
10. The grain vibrating screen with a pre-treatment mechanism according to claim 9, characterized in that: The fixed groove (312) is in communication with the interior of the first collecting bin (317), the first collecting bin (317) is in communication with the connecting groove (115) via a first impurity guide channel (324), the lower side of the pre-processing channel (302) is in communication with the upper side of the screening box (104), and a first material guide plate (320) and a second material guide plate (321) are cooperatively installed in the pre-processing channel (302); A second rotating shaft (322) is installed on the pretreatment channel (302), and a plurality of beating rods (323) are installed on the second rotating shaft (322). The beating rods (323) are located between the first guide plate (320) and the second guide plate (321). A second driving motor (325) is installed on one side of the pretreatment channel (302), and the second driving motor (325) drives the second rotating shaft (322).