Directional dust falling device of salvia miltiorrhiza harvester

Abstract

The utility model discloses a kind of salvia miltiorrhiza harvester directional dust falling devices, it is related to the dust falling technical field of agricultural machinery, the salvia miltiorrhiza harvester includes rack, vibration conveying mechanism and excavating shovel, directional dust falling mechanism is equipped on the vibration conveying mechanism top and connected on rack, the directional dust falling mechanism includes closed shell, the closed shell bottom is alternately provided with several spray mechanisms and several negative pressure suction ports along salvia miltiorrhiza conveying direction, the negative pressure suction port is connected with the sedimentation cavity in closed shell, the sedimentation cavity outlet and the multistage cyclone dust removal mechanism connected with negative pressure suction unit are connected, dust is moderately agglomerated by spraying, then by negative pressure and timely suction, solve the technical problem that traditional spray dust falling salvia miltiorrhiza is damp and the clay adhesion and mildew risk caused thereby, simultaneously by gravity settling preliminary separation part large particle dust ball cooperation multistage cyclone dust removal, while guaranteeing dust removal effect, significantly improve the stability of equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of dust suppression technology for agricultural machinery, specifically to a directional dust suppression device for a Salvia miltiorrhiza harvester. Background Technology

[0002] Salvia miltiorrhiza harvesters generate a large amount of dust during the digging, conveying, and separating processes. When the digging shovels and plow blades of the Salvia miltiorrhiza harvester insert into the soil, they cut the soil structure and break up the soil clods around the roots. At the same time, the friction between the digging parts and the soil further grinds large soil clods into fine particles. Some of these particles are lifted up by the mechanical vibration, forming digging dust. After digging, the Salvia miltiorrhiza roots carry a large amount of wet soil. The harvester usually removes the attached soil by using a vibrating screen or a drum soil-shaking device. During the vibration process, the wet soil falls off due to centrifugal force or vibration, and some dry soil particles that are not completely clumped are directly shaken off, forming soil-shaking dust.

[0003] After the soil is vibrated at high frequency by a vibrating screen, the particle size is greatly refined, with only a small number of coarse particles larger than 100μm. These fine particles have a long suspension time and are easily dispersed over long distances by airflow, resulting in a more lasting impact on human health and the air environment. This makes it the most harmful dust-generating area and a core area that targeted dust suppression technology needs to focus on. Traditional spray dust suppression technology can easily cause the surface of Salvia miltiorrhiza to become humidified. Shaking off the soil will combine with the mist droplets to form a wet dust mixture, which will directly adhere to the root surface, causing the moisture content to rise rapidly. The polysaccharides, saponins and other organic components contained in Salvia miltiorrhiza are ideal nutrient sources for molds (Penicillium, Aspergillus). Toxins such as aflatoxin produced by mold metabolism can penetrate deep into the root system and cannot be removed even after subsequent drying, ultimately causing the Salvia miltiorrhiza to become unusable. Utility Model Content

[0004] One objective of this invention is to provide a directional dust suppression device for a Salvia miltiorrhiza harvester. Through an alternating spray mechanism and a negative pressure suction port above the vibrating transmission mechanism, the atomized water mist sprayed by the spray mechanism precisely encapsulates the dust, forming wet dust clumps. Simultaneously, the negative pressure suction port adsorbs these wet dust clumps. This not only prevents secondary dust generation due to uncollected dust but also significantly reduces the contact between the water mist and the Salvia miltiorrhiza. It solves the technical problems of traditional spray dust suppression methods leading to moisture absorption and deterioration of the Salvia miltiorrhiza's appearance. Furthermore, it addresses the derivative problems of fine powder being difficult to completely capture due to its tendency to suspend, and dust spreading and polluting the working environment. Ultimately, while efficiently reducing dust, it ensures the quality stability of the harvested Salvia miltiorrhiza.

[0005] This objective is achieved using the following technical solution:

[0006] A directional dust suppression device for a Salvia miltiorrhiza harvester is disclosed. The harvester includes a frame, a vibrating conveyor mechanism, and a digging shovel. A directional dust suppression mechanism connected to the frame is mounted above the vibrating conveyor mechanism. During the vibrating conveying process, Salvia miltiorrhiza separates from soil and impurities, generating a large amount of suspended dust, including fine soil particles and Salvia miltiorrhiza fragments. This dust disperses upwards with the vibration. The directional dust suppression mechanism includes a closed shell. At the bottom of the closed shell, several spray mechanisms and several negative pressure suction ports are alternately arranged along the Salvia miltiorrhiza conveying direction. The spray mechanisms, located at the bottom of the shell, can precisely encapsulate the dust through directional atomized water mist, while the negative pressure suction ports simultaneously adsorb wet dust clumps, ensuring both efficient dust capture and... To reduce direct contact between water mist and Salvia miltiorrhiza and prevent it from getting damp, the negative pressure dust suction port is connected to the settling chamber inside the sealed shell. The outlet of the settling chamber is connected to the multi-stage cyclone dust removal mechanism with a negative pressure suction unit. First, the wet dust clumps are introduced into the settling chamber inside the shell. Gravity initially separates some of the large dust particles, reducing the subsequent dust removal load and protecting the multi-stage cyclone dust removal mechanism from clogging. Then, the multi-stage cyclone dust removal mechanism, in conjunction with the negative pressure suction unit, further separates the fine dust particles, and finally discharges clean airflow. This achieves efficient dust reduction during Salvia miltiorrhiza harvesting, solving the problem that traditional dust removal methods easily lead to Salvia miltiorrhiza getting damp and dust spreading, while also ensuring the stable operation of the dust removal equipment.

[0007] Compared to existing devices, most existing dust suppression devices for Salvia miltiorrhiza use spray dust suppression, with nozzles installed above or to the side of the vibrating conveyor mechanism. They achieve dust suppression by spraying atomized water into the Salvia miltiorrhiza conveying area. However, these devices lack a closed shell and precise dust control space. During the vibrating conveying process, Salvia miltiorrhiza is in prolonged contact with accumulated water, which can easily cause skin damage and discoloration. Furthermore, during subsequent storage, the high moisture content can lead to mold growth, severely affecting the appearance and processing value of the Salvia miltiorrhiza. At the same time, the moistened dust will be conveyed with the Salvia miltiorrhiza into subsequent screening and collection equipment, or directly accumulate in the gaps of the vibrating conveyor mechanism, increasing the maintenance cost and time of the equipment.

[0008] This invention uses spraying to moderately agglomerate dust, which is then promptly removed by negative pressure. This effectively reduces the adhesion of wet dust to the danshen (Salvia miltiorrhiza), thus avoiding prolonged moisture on the surface of the danshen and the resulting risk of clay adhesion and mold growth. At the same time, gravity settling is used to initially separate some large dust particles, combined with multi-stage cyclone dust removal. This ensures the dust removal effect while significantly improving the stability of equipment operation, reducing maintenance frequency, and protecting the quality of the danshen.

[0009] Furthermore, the spraying mechanism includes a fixed bracket and high-pressure atomizing nozzles. The high-pressure atomizing nozzles are evenly distributed on the fixed bracket, which provides a stable mounting base for the high-pressure atomizing nozzles. The high-pressure atomizing nozzles are connected to a liquid supply pipeline, which provides stable and uniform water pressure and flow rate to all high-pressure atomizing nozzles, ensuring that the atomization effect of each nozzle is consistent.

[0010] Furthermore, the angle between the high-pressure atomizing nozzle's spray direction and the horizontal direction of the Salvia miltiorrhiza conveying is 15-30°, and the angle is tilted towards the surface of the vibrating conveying mechanism. If the angle is too flat, the water mist will lack kinetic energy and will be easily blown off course by the slight airflow inside the enclosed shell, leaving the dust zone and resulting in ineffective consumption and water waste. If the angle is too steep, the water mist will sink too quickly due to gravity and will fall onto the surface of the conveying mechanism without fully contacting the suspended dust, thus failing to achieve effective aggregation. The tilt angle of 15-30° allows the water mist to extend towards the dust belt under the action of kinetic energy while slowly sinking with the help of gravity.

[0011] Furthermore, the bottom of the negative pressure suction port is higher than the outlet of the high-pressure atomizing nozzle. The droplets ejected from the nozzle need to collide with suspended dust to form stable wet dust clumps. The suction port being higher than the nozzle prevents premature adsorption by the negative pressure, preventing droplets from being drawn away before they are properly coated with dust, thus avoiding agglomeration and failure. After the wet dust clumps form, they will slowly sink due to gravity. The height advantage of the suction port allows for precise interception by negative pressure before they sink to the surface of the Salvia miltiorrhiza, preventing the wet dust from adhering to the Salvia miltiorrhiza and causing dampness. The height difference between the bottom of the negative pressure suction port and the outlet of the high-pressure atomizing nozzle is 5-10 cm. If the height difference is too small, the airflow will directly act on the droplets at the nozzle outlet, sucking away the insufficiently diffused droplets, resulting in uneven water mist coverage. If the height difference is too large, the traction force of the negative pressure field will decrease with distance, failing to effectively capture the sinking wet dust clumps, which will easily fall onto the Salvia miltiorrhiza. The height difference provides just the right space and time for the collision and encapsulation of atomized water mist and suspended dust, allowing the droplets to fully combine with the dust to form a stable wet dust mass, which is then adsorbed by negative pressure.

[0012] Furthermore, the shape of the negative pressure suction port is rectangular or oval. The length of the rectangular or oval suction port can be directly matched with the width of the conveying mechanism. The long strip-shaped suction port of the rectangular or oval suction port can form a continuous and uniform negative pressure band along the width direction, so that the wet dust clumps at each position are within the effective negative pressure range. When the airflow enters, the resistance is uniform, and a balanced negative pressure field can be formed within the coverage area of ​​the suction port. This avoids the situation where some wet dust clumps are not adsorbed in time due to uneven negative pressure. The coverage width of the negative pressure suction port is greater than or equal to the spray width of the high-pressure atomizing nozzle, ensuring that all wet dust clumps in the spray area can be covered by negative pressure, and ensuring that the agglomerated wet dust clumps are extracted in time.

[0013] Furthermore, the inlet structure of the negative pressure suction port to the dust generation area is gradually expanding. The gradually expanding inlet can more comprehensively suck up the dispersed wet dust clumps by expanding the front opening range, avoiding the escape of wet dust clumps at the edges due to insufficient inlet width. The smooth transition structure of the gradually expanding inlet allows the airflow to gently contract from the dust generation area to the inside of the suction port, reducing eddy current generation, reducing airflow resistance, and ensuring that the negative pressure field can act more effectively on the wet dust clumps.

[0014] Furthermore, the multi-stage cyclone dust removal mechanism includes several cyclone dust removal devices. Each cyclone dust removal device includes a cylinder with an exhaust port and a tangential inlet. The exhaust port of the cyclone dust collector is connected to the tangential inlet of another cyclone dust removal device. The dust-laden airflow, after gravity settling, enters the cyclone cylinder at high speed through the tangential inlet and spirals downward along the inner wall of the cylinder. During the rotation of the airflow, a strong centrifugal force is generated. Dust particles with a density much greater than that of air are thrown towards the inner wall of the shell due to inertia, and then slide down the wall to the ash discharge port at the bottom of the shell. The initially purified airflow forms a spiral upward airflow in the center of the shell and is discharged through the exhaust port at the top, entering the next stage of the cyclone dust removal device. Compared with bag dust removal and other methods, multi-stage cyclone dust removal does not require replacement of filter media, avoiding secondary pollution caused by dust particles falling off the filter media. The separated dust particles can be collected centrally through the ash discharge port. The dust-laden airflow passes through multiple cyclone devices in sequence, which can effectively capture ultrafine dust particles that are difficult to handle by a single-stage cyclone device, resulting in high overall dust removal efficiency.

[0015] Furthermore, the bottom of the shell is provided with a dust discharge port, which is connected to the screw conveyor mechanism. Each stage of the cyclone device throws dust particles toward the inner wall of the shell by centrifugal force. After the dust particles slide down the wall, they will accumulate at the bottom of the shell. The dust discharge port at the bottom of the shell is directly connected to the screw conveyor mechanism, and the dust is directly transported to the field area where the harvesting operation is located through the screw conveyor structure connected to it, without the need for additional dust collection boxes for storage, subsequent manual cleaning or treatment.

[0016] Furthermore, the spiral conveying mechanism includes a spiral shaft and a spiral groove. The spiral shaft is provided with spiral blades, which are located in the spiral groove. The spiral shaft can rotate around its own axis. Dust particles falling from the ash discharge port of the cyclone dust collector will directly enter the spiral groove of the spiral conveying mechanism and naturally accumulate at the bottom of the spiral groove and in the cavity between the spiral blades. When the spiral blades on the spiral shaft rotate, the spiral blades will push the dust particles to move towards the outlet of the spiral groove, thereby realizing the conveying of dust particles.

[0017] Furthermore, the outlet of the spiral groove is connected to the discharge port set on the closed shell, which can ensure that dust particles are always discharged from the preset discharge port into the field, reducing subsequent cleaning procedures and improving overall operation efficiency and reliability.

[0018] Compared with the prior art, the directional dust suppression device for a Salvia miltiorrhiza harvester provided by this utility model has the following beneficial effects:

[0019] 1. This utility model discloses a directional dust suppression device for a Salvia miltiorrhiza harvester. Through an alternating spray mechanism and a negative pressure dust suction port above the vibration conveying mechanism, the spray mechanism can promptly atomize and encapsulate the dust raised during the vibration conveying process, transforming the suspended dust into easily captured wet dust clumps. The alternating negative pressure dust suction port can closely follow the spray rhythm and accurately capture the newly formed wet dust clumps. This solves the technical problems of traditional spray dust suppression causing Salvia miltiorrhiza to become damp and deteriorate in appearance. It also solves the problems of low capture efficiency of suspended fine dust and easy dust dispersion of the negative pressure dust suction port, greatly improving the dust suppression efficiency, ensuring the stable quality and moisture content of Salvia miltiorrhiza after harvest, and meeting the clean and efficient requirements of large-scale Salvia miltiorrhiza harvesting.

[0020] 2. The present invention relates to a directional dust removal device for a Salvia miltiorrhiza harvester. The device uses a settling chamber to initially separate the wet dust clumps sucked in by the negative pressure dust suction port before they enter a multi-stage cyclone dust collector. This device can process dust particles of different sizes in stages, avoiding large wet dust clumps from directly entering the cyclone device and causing wear or blockage. The multi-stage cyclone dust collector significantly improves dust removal efficiency and extends the equipment maintenance cycle. Attached Figure Description

[0021] The accompanying drawings, which are provided to further illustrate the embodiments of the present invention and constitute a part of the present invention, do not constitute a limitation thereof.

[0022] Figure 1 This is a front view of the overall structure of a directional dust suppression device for a Salvia miltiorrhiza harvester according to this utility model;

[0023] Figure 2 This is a side view of the overall structure of a directional dust suppression device for a Salvia miltiorrhiza harvester according to this utility model;

[0024] Figure 3 This is a schematic diagram of the directional dust suppression device in this utility model;

[0025] Figure 4 This is a bottom view of the directional dust suppression device structure in this utility model;

[0026] Figure 5 This is a schematic diagram of the negative pressure dust suction port structure in this utility model;

[0027] Among them, 1-frame, 2-vibration transmission mechanism, 3-digging shovel, 4-enclosed shell, 5-negative pressure dust suction port, 6-settling chamber, 7-negative pressure fan, 8-fixed bracket, 9-high pressure atomizing nozzle, 10-liquid supply pipeline, 11-cylinder, 12-exhaust port, 13-tangential air inlet, 14-ash discharge port, 15-connecting pipe, 16-spiral shaft, 17-spiral groove, 18-spiral blade, 19-motor, 20-discharge port. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments of this utility model and the features within them can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0030] Example 1

[0031] like Figure 1 The diagram shows a directional dust suppression device for a Salvia miltiorrhiza harvester. The harvester includes a frame 1, a vibrating transmission mechanism 2, and a digging shovel 3. The vibrating transmission mechanism is the core process for separating Salvia miltiorrhiza from soil, where a large amount of dust is generated directly. A directional dust suppression mechanism is connected to the frame 1 above the vibrating transmission mechanism 2. The directional dust suppression mechanism includes a closed housing 4, as shown... Figure 4 As shown, the bottom of the enclosed shell 4 is alternately equipped with several spray mechanisms and several negative pressure dust suction ports 5 along the conveying direction of the Salvia miltiorrhiza. When the Salvia miltiorrhiza harvester is working, a large amount of suspended dust is generated above the vibrating conveying mechanism. The spray mechanism sprays water precisely onto the dust-generating area above the vibrating conveying mechanism through high-pressure atomizing nozzles 9, only enveloping the suspended dust to form a denser and more easily captured wet dust cloud. The adjacent negative pressure dust suction port quickly sucks the wet dust cloud into the suction channel before it settles and adheres to the surface of the Salvia miltiorrhiza and spreads to other areas. The negative pressure dust suction port 5 is connected to the settling chamber 6 inside the enclosed shell 4. The outlet of the settling chamber 6 is connected to a 7-stage cyclone dust removal mechanism connected to a negative pressure fan. The dust is conveyed to the subsequent settling chamber 6 through the suction channel. At this time, there is no wet dust cloud adhering to the surface of the Salvia miltiorrhiza. Only a small amount of residual mist droplets will evaporate naturally with the vibration of the conveying mechanism or the airflow. This solves the technical problem of Salvia miltiorrhiza getting damp and its appearance deteriorating due to traditional spray dust suppression, and ensures the quality of the harvested Salvia miltiorrhiza.

[0032] In some embodiments, such as Figure 3 As shown, the spraying mechanism includes a fixed bracket 8 and a high-pressure atomizing nozzle 9. The high-pressure atomizing nozzle 9 is evenly distributed on the fixed bracket 8 and is connected to the liquid supply pipeline 10.

[0033] In some embodiments, the high-pressure atomizing nozzle 9 is a fan-shaped atomizing nozzle with an atomization particle size of 50-80μm. This particle size can effectively encapsulate dust particles of 5-100μm without causing water accumulation due to excessively large droplets. Furthermore, several high-pressure atomizing nozzles 9 are evenly distributed along the length of the fixed support 8, and the spacing between adjacent high-pressure atomizing nozzles 9 is set to 8-9cm to ensure that the spray range of adjacent nozzles can form a gapless coverage zone. The coverage width is completely matched with the conveying width of the vibration conveying mechanism 2, avoiding the occurrence of spray blind spots that cause local dust to remain untreated.

[0034] Example 2

[0035] Based on Example 1, such as Figure 2 As shown, the angle between the spray direction of the high-pressure atomizing nozzle 9 and the horizontal direction of the Salvia miltiorrhiza delivery is 15-30°, and the angle is tilted towards the surface of the vibration transmission mechanism 2.

[0036] In some embodiments, the bottom of the negative pressure suction port 5 is higher than the outlet end of the high pressure atomizing nozzle 9, and the height difference between the bottom of the negative pressure suction port 5 and the outlet end of the high pressure atomizing nozzle 9 is 5-10cm.

[0037] In some embodiments, the negative pressure suction port 5 is rectangular or flattened oval in shape, and the coverage width of the negative pressure suction port 5 is greater than or equal to the spray width of the high-pressure atomizing nozzle 9.

[0038] In some embodiments, the width of the negative pressure suction port 5 is 55-75cm, and the width of the vibration transmission mechanism is 60-80cm.

[0039] In some embodiments, such as Figure 5 As shown, the inlet structure of the negative pressure suction port 5 to the dust generation area is gradually expanding, which allows the negative pressure suction port 5 to more comprehensively suck up the dispersed wet dust clumps.

[0040] Example 3

[0041] Based on Examples 1 and 2, such as Figure 2As shown, the multi-stage cyclone dust removal mechanism includes several cyclone dust removal devices. Each cyclone dust removal device includes a cylinder 11, which is provided with an exhaust port 12 and a tangential air inlet 13. When the dust-laden airflow enters the cylinder 11 from the settling chamber 6 through the connecting pipe 15 and the tangential air inlet 13, it forms a high-speed rotating airflow along the inner wall of the cylinder 11. The dust particles in the airflow, because their density is much greater than that of air, are thrown towards the inner wall of the cylinder 11 under the action of centrifugal force, and then slide down the wall to the ash discharge port 14 at the bottom of the cylinder 11, completing the primary separation. The exhaust port 12 of the cyclone dust collector is connected to the tangential air inlet 13 of another cyclone dust removal device. The gas after primary separation enters the tangential air inlet 13 of another cyclone dust removal device for further separation of dust particles in the airflow.

[0042] In some embodiments, the diameter of the cyclone dust collector is 1.5 times its height.

[0043] In some embodiments, the bottom of the cylinder 11 is provided with a dust discharge port 14, which is connected to a screw conveyor mechanism. The dust particles entering the dust discharge port 14 are affected by gravity and enter the screw conveyor structure. The outlet of the screw groove 17 is connected to the discharge port 20 provided on the closed shell 4. The dust particles are discharged through the screw conveyor structure to the discharge port 20.

[0044] In some embodiments, the discharge port 20 can be located on both sides of the housing 4 along the operating direction of the Salvia miltiorrhiza harvester, and the discharge port 20 can also be connected to the dust collection box.

[0045] In some embodiments, the spiral conveying mechanism includes a spiral shaft 16 and a spiral groove 17. The spiral shaft 16 is provided with spiral blades 18, which are located in the spiral groove 17. The spiral shaft 16 is connected to a motor 19. The rotation of the motor 19 drives the spiral blades 18 on the spiral shaft 16 to rotate, thereby conveying dust particles after cyclone dust removal.

[0046] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0047] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A directional dust suppression device for a Salvia miltiorrhiza harvester, the Salvia miltiorrhiza harvester comprising a frame (1), a vibration transmission mechanism (2), and a digging shovel (3), characterized in that, The vibration transmission mechanism (2) is provided with a directional dust collection mechanism connected to the frame (1) above it. The directional dust collection mechanism includes a closed shell (4). Several spray mechanisms and several negative pressure dust collection ports (5) are alternately arranged at the bottom of the closed shell (4) along the conveying direction of the danshen. The negative pressure dust collection ports (5) are connected to the settling chamber (6) inside the closed shell (4). The outlet of the settling chamber (6) is connected to a multi-stage cyclone dust removal mechanism connected to a negative pressure suction unit.

2. The directional dust suppression device for a Salvia miltiorrhiza harvester according to claim 1, characterized in that, The spraying mechanism includes a fixed bracket (8) and a high-pressure atomizing nozzle (9). The high-pressure atomizing nozzle (9) is evenly distributed on the fixed bracket (8) and is connected to the liquid supply pipeline (10).

3. The directional dust suppression device for a Salvia miltiorrhiza harvester according to claim 2, characterized in that, The angle between the spray direction of the high-pressure atomizing nozzle (9) and the horizontal direction of the Danshen delivery is 15-30°, and the angle is tilted towards the surface of the vibration transmission mechanism (2).

4. The directional dust suppression device for a Salvia miltiorrhiza harvester according to claim 1, characterized in that, The bottom of the negative pressure suction port (5) is higher than the outlet end of the high pressure atomizing nozzle (9), and the height difference between the bottom of the negative pressure suction port (5) and the outlet end of the high pressure atomizing nozzle (9) is 5-10cm.

5. The directional dust suppression device for a Salvia miltiorrhiza harvester according to claim 1, characterized in that, The shape of the negative pressure suction port (5) is rectangular or flat round, and the coverage width of the negative pressure suction port (5) is greater than or equal to the spray width of the high pressure atomizing nozzle (9).

6. The directional dust suppression device for a Salvia miltiorrhiza harvester according to claim 1, characterized in that, The negative pressure dust suction port (5) has a gradually expanding inlet structure to the dust generation area.

7. The directional dust suppression device for a Salvia miltiorrhiza harvester according to claim 1, characterized in that, The multi-stage cyclone dust removal mechanism includes several cyclone dust removal devices. Each cyclone dust removal device includes a cylinder (11), which is provided with an exhaust port (12) and a tangential air inlet (13). The exhaust port (12) of the cyclone dust removal device is connected to the tangential air inlet (13) of another cyclone dust removal device.

8. A directional dust suppression device for a Salvia miltiorrhiza harvester according to claim 7, characterized in that, The bottom of the cylinder (11) is provided with a dust discharge port (14), which is connected to a screw conveyor mechanism for conveying dust.

9. A directional dust suppression device for a Salvia miltiorrhiza harvester according to claim 8, characterized in that, The spiral conveying mechanism includes a spiral shaft (16) and a spiral groove (17). The spiral shaft (16) is provided with spiral blades (18), which are located in the spiral groove (17). The spiral shaft (16) can rotate around its own axis.

10. A directional dust suppression device for a Salvia miltiorrhiza harvester according to claim 9, characterized in that, The outlet of the spiral groove (17) is connected to the discharge port (20) provided on the closed shell (4).

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