Metering dust suppression device

Abstract

The invention belongs to the technical field of grain delivery and transfer, and discloses a measurable dust suppression device which comprises a silo, a silo plate frame is fixedly connected to the outer wall of the bottom end of the silo, and a metering dust suppression part is jointly arranged between the silo plate frame and the silo; the net weight of grains is monitored in real time through a pressure sensor at the bottom of a grain discharging barrel pipe, an electric cylinder is triggered to control opening and closing of a charging tray, quantitative batch discharging is achieved, meanwhile, a counting light board provides visual monitoring, metering and dust suppression procedures are integrated, secondary dust raising is avoided, a screening net plate is driven by a threaded barrel to achieve synchronous rotation and reciprocating translation, and the screening efficiency is improved. A spiral material flow is formed, the synergistic effect of centrifugal force rotation and shear force translation is achieved, the problem of wet sticky particle blockage is solved, dust sucked by a corrugated pipe is directionally discharged through a conveying pipe and a one-way valve, a brush plate is driven to rotate to scrape a screen in cooperation with a wind wheel, metal blocks are beaten and vibrated synchronously, and zero-shutdown cleaning is achieved. And compared with manual cleaning, the efficiency can be efficiently improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of grain warehouse transfer, and particularly relates to a measurable dust suppression device. BACKGROUND

[0002] The warehouse for storing bulk materials is divided into two categories of agricultural silos and industrial silos. The agricultural silos are used to store grain, feed and other granular and powdery materials. At present, in the process of grain transfer, bulk grain mainly falls from the grain warehouse to the transport vehicle by the self-flowing mode of the silo. When unloading, the bulk material is unloaded to the lower corridor through the unloading hopper and is transported out by the horizontal belt conveyor. In addition, drying, weighing, silo turning, disinfection, cleaning and other work are carried out before the grain enters the warehouse, during the storage period and after the grain is unloaded. In the process of unloading and loading, the dust and light and fine impurities in the grain material will be scattered into the air. In addition, during the falling process of the grain material, the high-speed airflow squeezed out by the grain material will carry dust and light and fine impurities everywhere. A large amount of dust is diffused into the surrounding environment. Because the dust particles are small and light in quality, the settling velocity is slow, so the grain loading and transfer site remains in a dust-filled state for a long time, which is harmful to the health of the loading workers and also pollutes the atmospheric environment. In addition, when the bulk grain falls from the grain warehouse to the transport vehicle by the self-flowing mode of the silo, the flow cannot be accurately measured, and sometimes more or less grain is loaded. In order to avoid the grain quantity error being out of control, a measurable dust suppression device is invented. SUMMARY

[0003] To solve the problems in the background art, the present application provides a measurable dust suppression device.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a measurable dust suppression device, comprising a silo, a silo plate frame is fixedly connected to the outer wall of the bottom end of the silo, and a metering dust suppression part is jointly arranged between the silo plate frame and the silo. The metering dust suppression part comprises a lower grain cylinder fixedly connected to the inner wall of the bottom end of the silo, a material disc is connected to the outer wall of the upper and lower ends of the lower grain cylinder, a pressure sensor is fixedly connected to the inner and outer wall cylinder of the bottom end of the lower grain cylinder, and a counting light board is fixedly connected to the outer wall of the top end of the silo plate frame. A threaded cylinder is movably sleeved on the lower grain cylinder, threaded pipes are threadedly connected to the two end cylinders of the threaded cylinder, magnetic rings are slidingly connected to the outer walls of the two sides of the threaded cylinder, hollow ball valves are movably connected to the outer walls of the two magnetic rings, and a screening net plate for separating screened grain and dust is fixedly connected to the outer walls of the two hollow ball valves. Two ends of the threaded pipes are fixedly connected with hollow magnetic discs for driving the two magnetic rings to move.

[0005] Preferably, the metering dust suppression part further comprises two ear plates fixedly connected to the outer walls of the lower grain cylinder at both ends, two electric cylinders fixedly connected to the plate bodies of the two ear plates, a telescopic cylinder fixedly connected to the outer wall of a section of the plate body of the cylinder plate frame, and two support plates fixedly connected to the two end movable rod bodies of the telescopic cylinder.

[0006] Preferably, the other end of the threaded pipe is fixedly connected with a corrugated pipe, the opposite end of the corrugated pipe is fixedly connected with the corresponding support plate, the other end of the corrugated pipe is fixedly connected with a bent plate frame, and one end of the bent plate frame is fixedly connected with the silo.

[0007] Preferably, a plurality of air grooves are formed in the outer wall of the hollow magnetic disc in a surrounding manner, and a plurality of curtains are fixedly connected to the cylinder body of the threaded cylinder.

[0008] Preferably, a gas plug plate is connected to the other end of the threaded pipe, a plurality of bent splicing plates are fixedly connected to the outer wall of the gas plug plate, the other end of the two groups of bent splicing plates is fixedly connected with the outer wall of the threaded pipe, and a spring two is fixedly connected between the two groups of bent splicing plates.

[0009] Preferably, a plurality of groups of wind wheels are symmetrically arranged in the inner wall of each screening net plate, a threaded rod is threadedly connected to each wind wheel, and a metal block is fixedly connected to one end of the threaded rod.

[0010] Preferably, each metal block is intermittently connected to the inner wall of each screening net plate, a stop plate is fixedly connected to the rod body of each threaded rod, and each stop plate is intermittently connected to one end of each wind wheel.

[0011] Preferably, a brush plate is fixedly connected to the rod body of each threaded rod, a circular arc slot is formed in one end of each wind wheel for sliding connection of each metal block and brush plate, a sleeve rod one is movably sleeved on each wind wheel, and a sleeve rod two is movably sleeved on each threaded rod.

[0012] Preferably, the rod bodies of each sleeve rod one and sleeve rod two are fixedly connected to the inner wall of the screening net plate, and a torsional spring is fixedly connected between each sleeve rod two and each wind wheel.

[0013] Preferably, the bottom end of the two corrugated pipes is fixedly connected with a conveying pipe on one side, and a one-way valve is fixedly connected on the pipe body of each conveying pipe.

[0014] Compared with the prior art, the application has the following advantages: The application realizes quantitative batch unloading by monitoring the net weight of grain in real time through the pressure sensor at the bottom of the grain unloading cylinder, triggering the electric cylinder to control the opening and closing of the material disc, and providing visual monitoring through the counting lamp plate, realizes the integration of metering and dust suppression process, avoids secondary dust raising, and realizes synchronous rotation and reciprocating translation of the screening net plate through the threaded cylinder, forms a spiral material flow, and solves the problem of wet and sticky particle blockage through the synergistic effect of centrifugal force rotation and shear force translation. The application realizes zero downtime cleaning by sucking dust through the corrugated pipe, directing dust through the conveying pipe and one-way valve, cooperating with the rotation and scraping of the brush plate driven by the wind wheel, and synchronously performing metal block beating and vibration, which can efficiently improve the efficiency compared with manual cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the application.

[0016] Figure 2 It is a schematic diagram of the local cross-sectional structure of the grain unloading cylinder of the application.

[0017] Figure 3 It is a schematic diagram of the local structure of the metering and dust suppression part of the application.

[0018] Figure 4 It is a schematic diagram of the local cross-sectional structure of the threaded pipe and corrugated pipe of the application.

[0019] Figure 5 It is a schematic diagram of the overall structure of the conveying pipe and one-way valve of the application.

[0020] Figure 6 It is a schematic diagram of the local structure of the application Figure 4 A local enlarged structure diagram.

[0021] Figure 7 It is a schematic diagram of the local structure of the application Figure 5 B local enlarged structure diagram.

[0022] Figure 8 It is a schematic diagram of the split plane structure of the air plug plate and the bent plate of the application.

[0023] Figure 9 It is a schematic diagram of the complete structure of the wind wheel of the application.

[0024] Figure 10 It is a schematic diagram of the local structure of the application Figure 9 C local enlarged structure diagram.

[0025] In the drawings: 1, silo; 101, silo frame; 2, metering dust suppression part; 201, lower grain tube; 202, tray; 203, ear plate; 204, electric cylinder; 205, pressure sensor; 206, two-way telescopic cylinder; 207, support plate; 208, corrugated pipe; 209, threaded pipe; 210, threaded cylinder; 211, hollow magnetic disc; 212, magnetic ring; 213, hollow ball valve; 214, screening mesh plate; 215, spring one; 216, curtain; 217, air plug plate; 218, bent splice plate; 219, spring two; 220, wind wheel; 221, threaded rod; 222, metal block; 223, stop plate; 224, brush plate; 225, sleeve rod one; 226, sleeve rod two; 227, torsional spring; 228, conveying pipe; 229, one-way valve. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0027] As Figures 1 to 10 shown, the present application provides a metering dust suppression device, which comprises a silo 1, a silo frame 101 fixedly connected to the outer wall of the bottom end of the silo 1, and a metering dust suppression part 2 jointly arranged between the silo frame 101 and the silo 1. The metering dust suppression part 2 comprises a lower grain tube 201 fixedly connected through the bottom end inner wall of the silo 1, a tray 202 attached to the outer wall of the upper and lower ends of the lower grain tube 201, a pressure sensor 205 fixedly connected to the inner and outer wall cylinder of the bottom end of the lower grain tube 201, and a metering light board fixedly connected to the outer wall of the top end of the silo frame 101. The lower grain tube 201 is movably sleeved with a threaded cylinder 210, the threaded cylinder 210 is threadedly connected with threaded pipes 209 at both ends of the cylinder body, the magnetic rings 212 are slidably connected to the outer walls of both sides of the threaded cylinder 210, the hollow ball valves 213 are movably connected to the outer walls of the two magnetic rings 212 in a ring shape, the screening mesh plates 214 for separating screened grain and dust are fixedly connected to the outer walls of the two groups of hollow ball valves 213, and a spring one 215 is fixedly connected between each group of screening mesh plates 214. The one end pipe body of the two threaded pipes 209 is fixedly connected with a hollow magnetic disc 211 for driving the two magnetic rings 212 to translate, and the two magnetic rings 212 and the hollow magnetic disc 211 are magnetically attracted to each other.

[0028] Adopt the above scheme: the original state under the grain cylinder tube 201 above the installation of the tray 202 is not to block the lower grain cylinder tube 201, the lower tray 202 is to block its bottom, so as to ensure that multiple screening mesh plate 214 can be fully contacted with the grain being discharged, and the grain being discharged will be cleaned, and the net weight reaches a certain value, the grain continuously presses the pressure sensor 205 installed in the bottom end inner wall of the lower grain cylinder tube 201, the pressure sensor 205 can output electric signal to the related controller, when the pressure is higher than the set value, the controller triggers the electric cylinder 204 to start, so as to push the lower tray 202 to make the cleaned grain naturally discharge and load, while the upper tray 202 is passively blocked the lower grain cylinder tube 201, so that the grain in the silo 1 cannot be discharged, this process will continue for a certain programming setting time, and then reset, so as to reciprocate, and when discharging a certain weight of grain, the passive translation process of the lower tray 202 will touch the pressure sensor 205 installed on the bottom end of the lower grain cylinder tube 201, and the electric signal output by the pressure sensor 205 will make the counting lamp plate light up in turn, so as to facilitate manual identification and clear the current weight of the grain being discharged. As Figure 2 And Figure 3 As shown, when the threaded pipe 209 is passively forced to move, it will be threadedly engaged with the threaded cylinder 210 to drive it to rotate, and the rotating threaded cylinder 210 will drive multiple screening mesh plates 214 connected by the curtain 216 to rotate simultaneously, so that the grain on the rotating screen surface is subjected to centrifugal force to form a spiral advancing path, prolonging the contact time, so that fine particles and dust can be fully sieved, which is superior to linear vibration screen, improving the dust negative pressure adsorption efficiency. In this process, the passive translation of the threaded pipe 209 will simultaneously drive the translation of the hollow magnetic disk 211, so as to realize the translation of the corresponding magnetic adsorption magnetic ring 212 on the outer wall of the threaded cylinder 210, thereby driving multiple screening mesh plates 214 to rotate and translate, intermittently extruding the spring 215, so that it is deformed. The lateral friction force generated by the translation of the multiple screening mesh plates 214 combined with the rotational centrifugal force forms a bidirectional self-cleaning effect on the screen hole, effectively stripping the bran, wet and sticky particles.

[0029] The metering dust suppression unit 2 also includes ear plates 203 fixedly connected to the outer walls of the upper and lower ends of the lower grain drum pipe 201. Electric cylinders 204 are fixedly connected to the plates of both ear plates 203. A bidirectional telescopic cylinder 206 is fixedly connected to the outer wall of one section of the drum plate frame 101. Support plates 207 are fixedly connected to the movable rods at both ends of the bidirectional telescopic cylinder 206. Corrugated pipes 208 are fixedly connected through the other ends of the two threaded pipes 209. The opposite ends of the two corrugated pipes 208... The pipes are fixedly connected to the corresponding support plates 207 respectively. A bent plate frame is fixedly connected to the other end of one of the corrugated pipes 208. One end of the bent plate frame is fixedly connected to the silo 1. Multiple air slots are opened in a ring-shaped manner on the outer wall of the two hollow disks 211. Multiple curtains 216 are fixedly connected through the cylinder of the threaded cylinder 210. Both ends of each curtain 216 are fixedly connected to the outer walls of the magnetic ring 212. Two corrugated pipes 208 are connected to a conveying pipe 228 through one side of the bottom end of the pipe body, and a one-way valve 229 is fixedly connected to the pipe body of each conveying pipe 228.

[0030] Using the above scheme: Grain is discharged through silo 1, and it falls naturally into the receiving transport compartment below. However, before this, the grain will come into contact with multiple screen plates 214. At that time, it is also necessary to activate the bidirectional telescopic cylinder 206 installed on the silo frame 101 in advance. The bidirectional telescopic cylinder 206 drives the support plates 207 installed at both ends to move. Figure 2 As shown, this causes the corresponding corrugated pipe 208 to be squeezed and extended at the same time, so that the two cavities can be sucked and squeezed respectively. The corrugated pipe 208 that generates suction force will suck the dust contained in the grain through the corresponding threaded pipe 209, hollow disk 211, hollow ball valve 213 and screen plate 214. The squeezed corrugated pipe 208 will squeeze the gas or dust-containing gas in its inner cavity out through the conveying pipe 228. The one-way valve 229 installed on the conveying pipe 228 can control that it can only flow in one direction. The magnetic ring 212 moves on the outer wall of the threaded cylinder 210. During the translation process, the curtains 216 connected to the outer walls at both ends are squeezed and stretched in real time. The curtains 216 are pulled in real time to prevent the grain from falling into the threaded cylinder 210.

[0031] Air plugs 217 are fitted and snapped into the other end of the two threaded pipes 209. Multiple bent splices 218 are fixedly connected to the outer wall of each of the two air plugs 217. The other end of each set of bent splices 218 is fixedly connected to the outer wall of the two threaded pipes 209 respectively, and springs 219 are fixedly connected between each set of bent splices 218.

[0032] The above solution is adopted: such as Figure 7 and Figure 8As shown, the air stopper plate 217 exhibits different states when subjected to gas suction and compression. When compressed, the air stopper plate 217, along with multiple bent splice plates 218, compresses the corresponding spring 219, causing it to deform and contract. Thus, the air stopper plate 217 engages with the inner wall of the threaded tube 209, preventing the dust remaining in the threaded tube 209, hollow disk 211, hollow ball valve 213, and screen plate 214 from being squeezed back into the lower grain hopper tube 201.

[0033] Each screen plate 214 has multiple sets of impellers 220 symmetrically arranged on its inner wall, and each impeller 220 is threadedly connected to a threaded rod 221. A metal block 222 is fixedly connected to one end of each threaded rod 221. Each metal block 222 can intermittently engage with the inner wall of each screen plate 214. Furthermore, each threaded rod 221 is fixedly connected to a stop plate 223, which can intermittently engage with one end of the inner wall of each impeller 220. Each threaded rod 221... A brush plate 224 is fixedly connected to the rod body. One end of each impeller 220 is provided with an arc-shaped groove for sliding connection between each metal block 222 and the brush plate 224. Each impeller 220 is movably sleeved with a sleeve rod 225, and each threaded rod 221 is movably sleeved with a sleeve rod 226. The rod body of each sleeve rod 225 and sleeve rod 226 is fixedly connected to the inner wall of the screen plate 214. Each sleeve rod 226 and each impeller 220 are jointly and fixedly connected with a torsion spring 227.

[0034] Using the above solution: When gas passes through the screen plate 214 and continuously feeds material into the lower grain hopper 201, causing a certain amount of material accumulation, the resulting dust absorption capacity, such as... Figure 9 and Figure 10 As shown, when the airflow enters, it drives multiple impellers 220 to rotate simultaneously under the limit of the corresponding sleeve rod 225. The rotating impellers 220 drive the threaded rod 221 to translate under the limit of the sleeve rod 226, thereby causing the metal block 222 to quickly strike the inner wall of the sieve plate 214. This vibration at the striking point dislodges the grain husks and dust adhering to the surface of the sieve plate 214, preventing the accumulation of material impurities from affecting the sieve effect. The translation of the brush plate 224 driven by the threaded rod 221 brings it into contact with the sieve plate 214. Simultaneously, the abutment plate 223 abuts against and engages with the inner wall of the impeller 220. At this time, the rotating impeller 220 also synchronously drives the threaded rod 221 and the brush plate 224 to rotate one revolution. Figure 10 As shown, the rotation of the impeller 220 will drive the torsion spring 227 to coil and deform in real time. The installation of the torsion spring 227 makes it convenient to drive the impeller 220 to reverse when there is no gas suction in the later stage, so as to reset the metal block 222 and the brush plate 224.

[0035] One point needs to be added: During the deployment and use of the 228 pipeline, its bottom end must be connected to a dust collection bag or dust guide pipe via a snap-fit ​​or threaded connection to properly handle the discharged dust and gas.

[0036] The working principle and usage process of this invention: Grain is discharged through silo 1, and the grain falls naturally into the receiving transport compartment below. However, before this, the grain will come into contact with multiple sieve plates 214. Simultaneously, the bidirectional telescopic cylinder 206 installed on the silo frame 101 needs to be activated in advance. The bidirectional telescopic cylinder 206 drives the support plates 207 installed at both ends to move, such as... Figure 2 As shown, this causes the corresponding corrugated pipe 208 to extend while being squeezed, generating suction force. The corrugated pipe 208 then passes through the corresponding threaded pipe 209, hollow disk 211, hollow ball valve 213, and screen plate 214 to suck up the dust contained in the grain. Meanwhile, the squeezed corrugated pipe 208 will expel the gas in its inner cavity through the conveying pipe 228. Figure 2 and Figure 3 As shown, the bellows 208, which moves due to the suction effect, simultaneously causes the corresponding threaded pipe 209 to move under force, thereby engaging with the threaded cylinder 210 and causing it to rotate. The rotating threaded cylinder 210 causes multiple screen plates 214 connected by the curtain 216 to rotate simultaneously. During this process, the passive translation of the threaded pipe 209 synchronously causes the hollow disk 211 to translate, thereby causing the corresponding magnetically adsorbed magnetic ring 212 to translate on the outer wall of the threaded cylinder 210. During the translation process, the curtain 216 connected to the outer walls at both ends is squeezed and stretched in real time, thereby causing the multiple screen plates 214 to rotate and translate simultaneously, intermittently squeezing the spring 215, causing it to deform, such as... Figure 7 and Figure 8 As shown, the air plug 217 exhibits different states when subjected to gas suction and compression. When compressed, the air plug 217, together with multiple bent splice plates 218, will compress the corresponding spring 219, causing it to deform and contract. Thus, the air plug 217 is engaged in the inner wall of the threaded tube 209. Meanwhile, as gas passes through the screen plate 214 and continuously feeds material into the lower grain hopper 201, a certain amount of material accumulates, generating dust absorption capacity, such as... Figure 9 and Figure 10As shown, the air flow entering will drive multiple wind wheels 220 to rotate simultaneously under the limiting of the corresponding sleeve rod one 225, and the rotating wind wheels 220 will drive the threaded rod 221 to translate under the limiting of the sleeve rod two 226, thereby driving the metal block 222 to hit the inner wall of the screening net plate 214 quickly, and the translation of the brush plate 224 driven by the threaded rod 221 will make it contact the screening net plate 214, and at the same time, the stop plate 223 is clamped to the inner wall of the wind wheel 220, at this time, the rotating wind wheel 220 will also drive the threaded rod 221 and the brush plate 224 related structure to rotate a circle, such as Figure 10 As shown, the rotation of the wind wheel 220 will drive the torsion spring 227 to be wound and deformed in real time, and the installation of the torsion spring 227 is convenient for reversing the wind wheel 220 to reset the metal block 222 and the brush plate 224 when there is no suction gas adsorption.

[0037] It should be noted that in this paper, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0038] Although the embodiments of the present application have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A metering dust suppression device, comprising a silo (1), characterized in that: A silo frame (101) is fixedly connected to the bottom outer wall of the silo (1), and a metering dust suppression part (2) is provided between the silo frame (101) and the silo (1). The metering dust suppression unit (2) includes a lower grain cylinder pipe (201) that is fixedly connected to the inner wall of the bottom end of the silo (1). The upper and lower ends of the lower grain cylinder pipe (201) are attached to the outer walls of the outer walls of the upper and lower ends. Pressure sensors (205) are fixedly connected to the inner and outer walls of the bottom end of the lower grain cylinder pipe (201). A counting light is fixedly connected to the outer wall of one side of the top end of the cylinder plate frame (101). A threaded cylinder (210) is movably sleeved through the lower grain cylinder tube (201). Threaded tubes (209) are threaded to both ends of the threaded cylinder (210). Magnetic rings (212) are slidably connected to both outer walls of the threaded cylinder (210). Hollow ball valves (213) are connected to the outer walls of the two magnetic rings (212) with a circumferential movable shaft. Screen plates (214) for separating sieved grain and dust are fixedly connected to the outer walls of the two sets of hollow ball valves (213). A spring (215) is fixedly connected between each set of screen plates (214). A hollow disk (211) for driving the two magnetic rings (212) to translate is fixedly connected to one end of each of the two threaded tubes (209). The two magnetic rings (212) and the hollow disk (211) are magnetically attracted to each other.

2. The meterable dust suppression device according to claim 1, characterized in that: The metering dust suppression unit (2) also includes ear plates (203) fixedly connected to the outer walls of the upper and lower ends of the lower grain hopper pipe (201). Electric cylinders (204) are fixedly connected to the plates of the two ear plates (203). A bidirectional telescopic cylinder (206) is fixedly connected to the outer wall of a section of the hopper frame (101). Support plates (207) are fixedly connected to the movable rods at both ends of the bidirectional telescopic cylinder (206).

3. The meterable dust suppression device according to claim 2, characterized in that: A corrugated pipe (208) is fixedly connected to the other end of each of the two threaded pipes (209). The opposite ends of the two corrugated pipes (208) are fixedly connected to the corresponding support plates (207). A bent plate frame is fixedly connected to the other end of one of the corrugated pipes (208), and one end of the bent plate frame is fixedly connected to the silo (1).

4. The meterable dust suppression device according to claim 1, characterized in that: Multiple air slots are provided around the outer walls of the two hollow disks (211). Multiple curtains (216) are fixedly connected through the cylinder of the threaded cylinder (210). Each curtain (216) has two ends that are fixedly connected to the outer walls of the magnetic ring (212). When the magnetic ring (212) moves along the threaded cylinder (210), it stretches or squeezes the curtain (216) synchronously, so that the curtain (216) always fits against the outer wall of the threaded cylinder (210). At the same time, the centrifugal force generated by the rotation of the screen plate (214) throws the grain to the outside of the screen plate (214). Together with the protection of the curtain (216), the active throwing and passive blocking work together to prevent the grain from entering the threaded cylinder (210).

5. The meterable dust suppression device according to claim 1, characterized in that: Air plugs (217) are fitted and snapped into the other end of each of the two threaded tubes (209). Multiple bent splices (218) are fixedly connected to the outer walls of the two air plugs (217). The other ends of the two sets of bent splices (218) are fixedly connected to the outer walls of the two threaded tubes (209), and springs (219) are fixedly connected between the two sets of bent splices (218). When the bellows (208) is expelled, the airflow pushes the air plugs (217) to compress the springs (219), so that the air plugs (217) fit against the inner wall of the threaded tube (209) to form a seal. When the bellows (208) is stretched and sucked, the springs (219) drive the air plugs (217) to reset, allowing the airflow to pass through.

6. The meterable dust suppression device according to claim 5, characterized in that: Each of the screen plates (214) has multiple sets of impellers (220) symmetrically arranged in the inner wall, and each impeller (220) is threaded with a threaded rod (221), and a metal block (222) is fixedly connected to one end of each threaded rod (221).

7. The meterable dust suppression device according to claim 6, characterized in that: Each of the metal blocks (222) can be intermittently attached to the inner wall of each of the screen plates (214), and each of the threaded rods (221) is also fixedly connected to a stop plate (223), and each of the stop plates (223) can be intermittently attached to the inner wall of one end of each impeller (220).

8. The meterable dust suppression device according to claim 7, characterized in that: Each threaded rod (221) is also fixedly connected to a brush plate (224). One end of each impeller (220) is provided with a circular arc groove for sliding connection between each metal block (222) and the brush plate (224). Each impeller (220) is movably sleeved with a sleeve rod one (225), and each threaded rod (221) is movably sleeved with a sleeve rod two (226).

9. The meterable dust suppression device according to claim 8, characterized in that: Each of the first sleeve rod (225) and the second sleeve rod (226) is fixedly connected to the inner wall of the screen plate (214). Each of the second sleeve rod (226) and each of the impellers (220) is fixedly connected with a torsion spring (227). The impeller (220) is driven to rotate by the suction airflow of the bellows (208), which synchronously drives the threaded rod (221) to move. The metal block (222) strikes the inner wall of the screen plate (214) at a stable frequency. The brush plate (224) slides along the arc groove, thereby passively receiving force to perform 360-degree rotation to clean the screen holes. After the airflow stops, the torsion spring (227) drives the impeller (220) to reset, ensuring that the self-cleaning action can be repeated when the airflow is driven again, thereby increasing the continuous working time of the screen plate (214) and eliminating the need for manual cleaning.

10. The meterable dust suppression device according to claim 3, characterized in that: A conveying pipe (228) is fixedly connected to one side of the bottom end of each of the two corrugated pipes (208), and a one-way valve (229) is fixedly connected to the body of each conveying pipe (228).

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